diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/3w-xxxx.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/Kconfig | 17 | ||||
| -rw-r--r-- | drivers/scsi/NCR5380.c | 2868 | ||||
| -rw-r--r-- | drivers/scsi/NCR5380.h | 87 | ||||
| -rw-r--r-- | drivers/scsi/arm/cumana_1.c | 31 | ||||
| -rw-r--r-- | drivers/scsi/arm/oak.c | 27 | ||||
| -rw-r--r-- | drivers/scsi/atari_NCR5380.c | 2266 | ||||
| -rw-r--r-- | drivers/scsi/atari_scsi.c | 102 | ||||
| -rw-r--r-- | drivers/scsi/cxgbi/cxgb3i/cxgb3i.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/dmx3191d.c | 33 | ||||
| -rw-r--r-- | drivers/scsi/dtc.c | 115 | ||||
| -rw-r--r-- | drivers/scsi/dtc.h | 45 | ||||
| -rw-r--r-- | drivers/scsi/g_NCR5380.c | 408 | ||||
| -rw-r--r-- | drivers/scsi/g_NCR5380.h | 66 | ||||
| -rw-r--r-- | drivers/scsi/hisi_sas/hisi_sas_v1_hw.c | 40 | ||||
| -rw-r--r-- | drivers/scsi/imm.c | 50 | ||||
| -rw-r--r-- | drivers/scsi/ipr.c | 5 | ||||
| -rw-r--r-- | drivers/scsi/mac_scsi.c | 117 | ||||
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_mm.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/pas16.c | 116 | ||||
| -rw-r--r-- | drivers/scsi/pas16.h | 40 | ||||
| -rw-r--r-- | drivers/scsi/scsi_devinfo.c | 1 | ||||
| -rw-r--r-- | drivers/scsi/storvsc_drv.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/sun3_scsi.c | 141 | ||||
| -rw-r--r-- | drivers/scsi/t128.c | 102 | ||||
| -rw-r--r-- | drivers/scsi/t128.h | 39 |
26 files changed, 3009 insertions, 3718 deletions
diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c index 2940bd769936..25aba1613e21 100644 --- a/drivers/scsi/3w-xxxx.c +++ b/drivers/scsi/3w-xxxx.c @@ -1045,6 +1045,9 @@ static int tw_chrdev_open(struct inode *inode, struct file *file) static const struct file_operations tw_fops = { .owner = THIS_MODULE, .unlocked_ioctl = tw_chrdev_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = tw_chrdev_ioctl, +#endif .open = tw_chrdev_open, .release = NULL, .llseek = noop_llseek, diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index c1fe0d2f90ca..23d862dfdde3 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -1620,23 +1620,6 @@ config ATARI_SCSI ST-DMA, replacing ACSI). It does NOT support other schemes, like in the Hades (without DMA). -config ATARI_SCSI_TOSHIBA_DELAY - bool "Long delays for Toshiba CD-ROMs" - depends on ATARI_SCSI - help - This option increases the delay after a SCSI arbitration to - accommodate some flaky Toshiba CD-ROM drives. Say Y if you intend to - use a Toshiba CD-ROM drive; otherwise, the option is not needed and - would impact performance a bit, so say N. - -config ATARI_SCSI_RESET_BOOT - bool "Reset SCSI-devices at boottime" - depends on ATARI_SCSI - help - Reset the devices on your Atari whenever it boots. This makes the - boot process fractionally longer but may assist recovery from errors - that leave the devices with SCSI operations partway completed. - config MAC_SCSI tristate "Macintosh NCR5380 SCSI" depends on MAC && SCSI=y diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index a777e5c412df..d72867257346 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -1,17 +1,17 @@ -/* +/* * NCR 5380 generic driver routines. These should make it *trivial* - * to implement 5380 SCSI drivers under Linux with a non-trantor - * architecture. + * to implement 5380 SCSI drivers under Linux with a non-trantor + * architecture. * - * Note that these routines also work with NR53c400 family chips. + * Note that these routines also work with NR53c400 family chips. * * Copyright 1993, Drew Eckhardt - * Visionary Computing - * (Unix and Linux consulting and custom programming) - * drew@colorado.edu - * +1 (303) 666-5836 + * Visionary Computing + * (Unix and Linux consulting and custom programming) + * drew@colorado.edu + * +1 (303) 666-5836 * - * For more information, please consult + * For more information, please consult * * NCR 5380 Family * SCSI Protocol Controller @@ -25,84 +25,28 @@ */ /* - * Revision 1.10 1998/9/2 Alan Cox - * (alan@lxorguk.ukuu.org.uk) - * Fixed up the timer lockups reported so far. Things still suck. Looking - * forward to 2.3 and per device request queues. Then it'll be possible to - * SMP thread this beast and improve life no end. - - * Revision 1.9 1997/7/27 Ronald van Cuijlenborg - * (ronald.van.cuijlenborg@tip.nl or nutty@dds.nl) - * (hopefully) fixed and enhanced USLEEP - * added support for DTC3181E card (for Mustek scanner) - * - - * Revision 1.8 Ingmar Baumgart - * (ingmar@gonzo.schwaben.de) - * added support for NCR53C400a card - * - - * Revision 1.7 1996/3/2 Ray Van Tassle (rayvt@comm.mot.com) - * added proc_info - * added support needed for DTC 3180/3280 - * fixed a couple of bugs - * - - * Revision 1.5 1994/01/19 09:14:57 drew - * Fixed udelay() hack that was being used on DATAOUT phases - * instead of a proper wait for the final handshake. - * - * Revision 1.4 1994/01/19 06:44:25 drew - * *** empty log message *** - * - * Revision 1.3 1994/01/19 05:24:40 drew - * Added support for TCR LAST_BYTE_SENT bit. - * - * Revision 1.2 1994/01/15 06:14:11 drew - * REAL DMA support, bug fixes. - * - * Revision 1.1 1994/01/15 06:00:54 drew - * Initial revision - * + * With contributions from Ray Van Tassle, Ingmar Baumgart, + * Ronald van Cuijlenborg, Alan Cox and others. */ /* - * Further development / testing that should be done : + * Further development / testing that should be done : * 1. Cleanup the NCR5380_transfer_dma function and DMA operation complete - * code so that everything does the same thing that's done at the - * end of a pseudo-DMA read operation. + * code so that everything does the same thing that's done at the + * end of a pseudo-DMA read operation. * * 2. Fix REAL_DMA (interrupt driven, polled works fine) - - * basically, transfer size needs to be reduced by one - * and the last byte read as is done with PSEUDO_DMA. - * - * 4. Test SCSI-II tagged queueing (I have no devices which support - * tagged queueing) - * - * 5. Test linked command handling code after Eric is ready with - * the high level code. + * basically, transfer size needs to be reduced by one + * and the last byte read as is done with PSEUDO_DMA. + * + * 4. Test SCSI-II tagged queueing (I have no devices which support + * tagged queueing) */ -#include <scsi/scsi_dbg.h> -#include <scsi/scsi_transport_spi.h> - -#if (NDEBUG & NDEBUG_LISTS) -#define LIST(x,y) {printk("LINE:%d Adding %p to %p\n", __LINE__, (void*)(x), (void*)(y)); if ((x)==(y)) udelay(5); } -#define REMOVE(w,x,y,z) {printk("LINE:%d Removing: %p->%p %p->%p \n", __LINE__, (void*)(w), (void*)(x), (void*)(y), (void*)(z)); if ((x)==(y)) udelay(5); } -#else -#define LIST(x,y) -#define REMOVE(w,x,y,z) -#endif #ifndef notyet -#undef LINKED #undef REAL_DMA #endif -#ifdef REAL_DMA_POLL -#undef READ_OVERRUNS -#define READ_OVERRUNS -#endif - #ifdef BOARD_REQUIRES_NO_DELAY #define io_recovery_delay(x) #else @@ -112,44 +56,28 @@ /* * Design * - * This is a generic 5380 driver. To use it on a different platform, + * This is a generic 5380 driver. To use it on a different platform, * one simply writes appropriate system specific macros (ie, data - * transfer - some PC's will use the I/O bus, 68K's must use + * transfer - some PC's will use the I/O bus, 68K's must use * memory mapped) and drops this file in their 'C' wrapper. * - * (Note from hch: unfortunately it was not enough for the different - * m68k folks and instead of improving this driver they copied it - * and hacked it up for their needs. As a consequence they lost - * most updates to this driver. Maybe someone will fix all these - * drivers to use a common core one day..) - * - * As far as command queueing, two queues are maintained for + * As far as command queueing, two queues are maintained for * each 5380 in the system - commands that haven't been issued yet, - * and commands that are currently executing. This means that an - * unlimited number of commands may be queued, letting - * more commands propagate from the higher driver levels giving higher - * throughput. Note that both I_T_L and I_T_L_Q nexuses are supported, - * allowing multiple commands to propagate all the way to a SCSI-II device + * and commands that are currently executing. This means that an + * unlimited number of commands may be queued, letting + * more commands propagate from the higher driver levels giving higher + * throughput. Note that both I_T_L and I_T_L_Q nexuses are supported, + * allowing multiple commands to propagate all the way to a SCSI-II device * while a command is already executing. * * - * Issues specific to the NCR5380 : + * Issues specific to the NCR5380 : * - * When used in a PIO or pseudo-dma mode, the NCR5380 is a braindead - * piece of hardware that requires you to sit in a loop polling for - * the REQ signal as long as you are connected. Some devices are - * brain dead (ie, many TEXEL CD ROM drives) and won't disconnect - * while doing long seek operations. - * - * The workaround for this is to keep track of devices that have - * disconnected. If the device hasn't disconnected, for commands that - * should disconnect, we do something like - * - * while (!REQ is asserted) { sleep for N usecs; poll for M usecs } - * - * Some tweaking of N and M needs to be done. An algorithm based - * on "time to data" would give the best results as long as short time - * to datas (ie, on the same track) were considered, however these + * When used in a PIO or pseudo-dma mode, the NCR5380 is a braindead + * piece of hardware that requires you to sit in a loop polling for + * the REQ signal as long as you are connected. Some devices are + * brain dead (ie, many TEXEL CD ROM drives) and won't disconnect + * while doing long seek operations. [...] These * broken devices are the exception rather than the rule and I'd rather * spend my time optimizing for the normal case. * @@ -159,23 +87,23 @@ * which is started from a workqueue for each NCR5380 host in the * system. It attempts to establish I_T_L or I_T_L_Q nexuses by * removing the commands from the issue queue and calling - * NCR5380_select() if a nexus is not established. + * NCR5380_select() if a nexus is not established. * * Once a nexus is established, the NCR5380_information_transfer() * phase goes through the various phases as instructed by the target. * if the target goes into MSG IN and sends a DISCONNECT message, * the command structure is placed into the per instance disconnected - * queue, and NCR5380_main tries to find more work. If the target is + * queue, and NCR5380_main tries to find more work. If the target is * idle for too long, the system will try to sleep. * * If a command has disconnected, eventually an interrupt will trigger, * calling NCR5380_intr() which will in turn call NCR5380_reselect * to reestablish a nexus. This will run main if necessary. * - * On command termination, the done function will be called as + * On command termination, the done function will be called as * appropriate. * - * SCSI pointers are maintained in the SCp field of SCSI command + * SCSI pointers are maintained in the SCp field of SCSI command * structures, being initialized after the command is connected * in NCR5380_select, and set as appropriate in NCR5380_information_transfer. * Note that in violation of the standard, an implicit SAVE POINTERS operation @@ -185,73 +113,48 @@ /* * Using this file : * This file a skeleton Linux SCSI driver for the NCR 5380 series - * of chips. To use it, you write an architecture specific functions + * of chips. To use it, you write an architecture specific functions * and macros and include this file in your driver. * - * These macros control options : - * AUTOPROBE_IRQ - if defined, the NCR5380_probe_irq() function will be - * defined. - * + * These macros control options : + * AUTOPROBE_IRQ - if defined, the NCR5380_probe_irq() function will be + * defined. + * * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically - * for commands that return with a CHECK CONDITION status. + * for commands that return with a CHECK CONDITION status. * * DIFFERENTIAL - if defined, NCR53c81 chips will use external differential - * transceivers. + * transceivers. * * DONT_USE_INTR - if defined, never use interrupts, even if we probe or - * override-configure an IRQ. - * - * LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512 - * bytes at a time. Since interrupts are disabled by default during - * these transfers, we might need this to give reasonable interrupt - * service time if the transfer size gets too large. - * - * LINKED - if defined, linked commands are supported. + * override-configure an IRQ. * * PSEUDO_DMA - if defined, PSEUDO DMA is used during the data transfer phases. * * REAL_DMA - if defined, REAL DMA is used during the data transfer phases. * * REAL_DMA_POLL - if defined, REAL DMA is used but the driver doesn't - * rely on phase mismatch and EOP interrupts to determine end - * of phase. - * - * UNSAFE - leave interrupts enabled during pseudo-DMA transfers. You - * only really want to use this if you're having a problem with - * dropped characters during high speed communications, and even - * then, you're going to be better off twiddling with transfersize - * in the high level code. - * - * Defaults for these will be provided although the user may want to adjust - * these to allocate CPU resources to the SCSI driver or "real" code. - * - * USLEEP_SLEEP - amount of time, in jiffies, to sleep - * - * USLEEP_POLL - amount of time, in jiffies, to poll + * rely on phase mismatch and EOP interrupts to determine end + * of phase. * * These macros MUST be defined : - * NCR5380_local_declare() - declare any local variables needed for your - * transfer routines. * - * NCR5380_setup(instance) - initialize any local variables needed from a given - * instance of the host adapter for NCR5380_{read,write,pread,pwrite} - * * NCR5380_read(register) - read from the specified register * - * NCR5380_write(register, value) - write to the specific register + * NCR5380_write(register, value) - write to the specific register * - * NCR5380_implementation_fields - additional fields needed for this - * specific implementation of the NCR5380 + * NCR5380_implementation_fields - additional fields needed for this + * specific implementation of the NCR5380 * * Either real DMA *or* pseudo DMA may be implemented - * REAL functions : + * REAL functions : * NCR5380_REAL_DMA should be defined if real DMA is to be used. - * Note that the DMA setup functions should return the number of bytes - * that they were able to program the controller for. + * Note that the DMA setup functions should return the number of bytes + * that they were able to program the controller for. * - * Also note that generic i386/PC versions of these macros are - * available as NCR5380_i386_dma_write_setup, - * NCR5380_i386_dma_read_setup, and NCR5380_i386_dma_residual. + * Also note that generic i386/PC versions of these macros are + * available as NCR5380_i386_dma_write_setup, + * NCR5380_i386_dma_read_setup, and NCR5380_i386_dma_residual. * * NCR5380_dma_write_setup(instance, src, count) - initialize * NCR5380_dma_read_setup(instance, dst, count) - initialize @@ -262,25 +165,25 @@ * NCR5380_pread(instance, dst, count); * * The generic driver is initialized by calling NCR5380_init(instance), - * after setting the appropriate host specific fields and ID. If the + * after setting the appropriate host specific fields and ID. If the * driver wishes to autoprobe for an IRQ line, the NCR5380_probe_irq(instance, * possible) function may be used. */ -static int do_abort(struct Scsi_Host *host); -static void do_reset(struct Scsi_Host *host); +static int do_abort(struct Scsi_Host *); +static void do_reset(struct Scsi_Host *); -/* - * initialize_SCp - init the scsi pointer field - * @cmd: command block to set up +/** + * initialize_SCp - init the scsi pointer field + * @cmd: command block to set up * - * Set up the internal fields in the SCSI command. + * Set up the internal fields in the SCSI command. */ static inline void initialize_SCp(struct scsi_cmnd *cmd) { - /* - * Initialize the Scsi Pointer field so that all of the commands in the + /* + * Initialize the Scsi Pointer field so that all of the commands in the * various queues are valid. */ @@ -295,120 +198,123 @@ static inline void initialize_SCp(struct scsi_cmnd *cmd) cmd->SCp.ptr = NULL; cmd->SCp.this_residual = 0; } + + cmd->SCp.Status = 0; + cmd->SCp.Message = 0; } /** - * NCR5380_poll_politely - wait for NCR5380 status bits - * @instance: controller to poll - * @reg: 5380 register to poll - * @bit: Bitmask to check - * @val: Value required to exit - * - * Polls the NCR5380 in a reasonably efficient manner waiting for - * an event to occur, after a short quick poll we begin giving the - * CPU back in non IRQ contexts - * - * Returns the value of the register or a negative error code. + * NCR5380_poll_politely2 - wait for two chip register values + * @instance: controller to poll + * @reg1: 5380 register to poll + * @bit1: Bitmask to check + * @val1: Expected value + * @reg2: Second 5380 register to poll + * @bit2: Second bitmask to check + * @val2: Second expected value + * @wait: Time-out in jiffies + * + * Polls the chip in a reasonably efficient manner waiting for an + * event to occur. After a short quick poll we begin to yield the CPU + * (if possible). In irq contexts the time-out is arbitrarily limited. + * Callers may hold locks as long as they are held in irq mode. + * + * Returns 0 if either or both event(s) occurred otherwise -ETIMEDOUT. */ - -static int NCR5380_poll_politely(struct Scsi_Host *instance, int reg, int bit, int val, int t) + +static int NCR5380_poll_politely2(struct Scsi_Host *instance, + int reg1, int bit1, int val1, + int reg2, int bit2, int val2, int wait) { - NCR5380_local_declare(); - int n = 500; /* At about 8uS a cycle for the cpu access */ - unsigned long end = jiffies + t; - int r; - - NCR5380_setup(instance); - - while( n-- > 0) - { - r = NCR5380_read(reg); - if((r & bit) == val) + struct NCR5380_hostdata *hostdata = shost_priv(instance); + unsigned long deadline = jiffies + wait; + unsigned long n; + + /* Busy-wait for up to 10 ms */ + n = min(10000U, jiffies_to_usecs(wait)); + n *= hostdata->accesses_per_ms; + n /= 2000; + do { + if ((NCR5380_read(reg1) & bit1) == val1) + return 0; + if ((NCR5380_read(reg2) & bit2) == val2) return 0; cpu_relax(); - } - - /* t time yet ? */ - while(time_before(jiffies, end)) - { - r = NCR5380_read(reg); - if((r & bit) == val) + } while (n--); + + if (irqs_disabled() || in_interrupt()) + return -ETIMEDOUT; + + /* Repeatedly sleep for 1 ms until deadline */ + while (time_is_after_jiffies(deadline)) { + schedule_timeout_uninterruptible(1); + if ((NCR5380_read(reg1) & bit1) == val1) + return 0; + if ((NCR5380_read(reg2) & bit2) == val2) return 0; - if(!in_interrupt()) - cond_resched(); - else - cpu_relax(); } + return -ETIMEDOUT; } -static struct { - unsigned char value; - const char *name; -} phases[] __maybe_unused = { - {PHASE_DATAOUT, "DATAOUT"}, - {PHASE_DATAIN, "DATAIN"}, - {PHASE_CMDOUT, "CMDOUT"}, - {PHASE_STATIN, "STATIN"}, - {PHASE_MSGOUT, "MSGOUT"}, - {PHASE_MSGIN, "MSGIN"}, - {PHASE_UNKNOWN, "UNKNOWN"} -}; +static inline int NCR5380_poll_politely(struct Scsi_Host *instance, + int reg, int bit, int val, int wait) +{ + return NCR5380_poll_politely2(instance, reg, bit, val, + reg, bit, val, wait); +} #if NDEBUG static struct { unsigned char mask; const char *name; -} signals[] = { - {SR_DBP, "PARITY"}, - {SR_RST, "RST"}, - {SR_BSY, "BSY"}, - {SR_REQ, "REQ"}, - {SR_MSG, "MSG"}, - {SR_CD, "CD"}, - {SR_IO, "IO"}, - {SR_SEL, "SEL"}, +} signals[] = { + {SR_DBP, "PARITY"}, + {SR_RST, "RST"}, + {SR_BSY, "BSY"}, + {SR_REQ, "REQ"}, + {SR_MSG, "MSG"}, + {SR_CD, "CD"}, + {SR_IO, "IO"}, + {SR_SEL, "SEL"}, {0, NULL} -}, +}, basrs[] = { - {BASR_ATN, "ATN"}, - {BASR_ACK, "ACK"}, + {BASR_ATN, "ATN"}, + {BASR_ACK, "ACK"}, {0, NULL} -}, -icrs[] = { - {ICR_ASSERT_RST, "ASSERT RST"}, - {ICR_ASSERT_ACK, "ASSERT ACK"}, - {ICR_ASSERT_BSY, "ASSERT BSY"}, - {ICR_ASSERT_SEL, "ASSERT SEL"}, - {ICR_ASSERT_ATN, "ASSERT ATN"}, - {ICR_ASSERT_DATA, "ASSERT DATA"}, +}, +icrs[] = { + {ICR_ASSERT_RST, "ASSERT RST"}, + {ICR_ASSERT_ACK, "ASSERT ACK"}, + {ICR_ASSERT_BSY, "ASSERT BSY"}, + {ICR_ASSERT_SEL, "ASSERT SEL"}, + {ICR_ASSERT_ATN, "ASSERT ATN"}, + {ICR_ASSERT_DATA, "ASSERT DATA"}, {0, NULL} -}, -mrs[] = { - {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"}, - {MR_TARGET, "MODE TARGET"}, - {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"}, - {MR_ENABLE_PAR_INTR, "MODE PARITY INTR"}, - {MR_MONITOR_BSY, "MODE MONITOR BSY"}, - {MR_DMA_MODE, "MODE DMA"}, - {MR_ARBITRATE, "MODE ARBITRATION"}, +}, +mrs[] = { + {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"}, + {MR_TARGET, "MODE TARGET"}, + {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"}, + {MR_ENABLE_PAR_INTR, "MODE PARITY INTR"}, + {MR_ENABLE_EOP_INTR, "MODE EOP INTR"}, + {MR_MONITOR_BSY, "MODE MONITOR BSY"}, + {MR_DMA_MODE, "MODE DMA"}, + {MR_ARBITRATE, "MODE ARBITRATION"}, {0, NULL} }; /** - * NCR5380_print - print scsi bus signals - * @instance: adapter state to dump - * - * Print the SCSI bus signals for debugging purposes + * NCR5380_print - print scsi bus signals + * @instance: adapter state to dump * - * Locks: caller holds hostdata lock (not essential) + * Print the SCSI bus signals for debugging purposes */ static void NCR5380_print(struct Scsi_Host *instance) { - NCR5380_local_declare(); unsigned char status, data, basr, mr, icr, i; - NCR5380_setup(instance); data = NCR5380_read(CURRENT_SCSI_DATA_REG); status = NCR5380_read(STATUS_REG); @@ -435,117 +341,56 @@ static void NCR5380_print(struct Scsi_Host *instance) printk("\n"); } +static struct { + unsigned char value; + const char *name; +} phases[] = { + {PHASE_DATAOUT, "DATAOUT"}, + {PHASE_DATAIN, "DATAIN"}, + {PHASE_CMDOUT, "CMDOUT"}, + {PHASE_STATIN, "STATIN"}, + {PHASE_MSGOUT, "MSGOUT"}, + {PHASE_MSGIN, "MSGIN"}, + {PHASE_UNKNOWN, "UNKNOWN"} +}; -/* - * NCR5380_print_phase - show SCSI phase - * @instance: adapter to dump - * - * Print the current SCSI phase for debugging purposes +/** + * NCR5380_print_phase - show SCSI phase + * @instance: adapter to dump * - * Locks: none + * Print the current SCSI phase for debugging purposes */ static void NCR5380_print_phase(struct Scsi_Host *instance) { - NCR5380_local_declare(); unsigned char status; int i; - NCR5380_setup(instance); status = NCR5380_read(STATUS_REG); if (!(status & SR_REQ)) - printk("scsi%d : REQ not asserted, phase unknown.\n", instance->host_no); + shost_printk(KERN_DEBUG, instance, "REQ not asserted, phase unknown.\n"); else { - for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i); - printk("scsi%d : phase %s\n", instance->host_no, phases[i].name); + for (i = 0; (phases[i].value != PHASE_UNKNOWN) && + (phases[i].value != (status & PHASE_MASK)); ++i) + ; + shost_printk(KERN_DEBUG, instance, "phase %s\n", phases[i].name); } } #endif -/* - * These need tweaking, and would probably work best as per-device - * flags initialized differently for disk, tape, cd, etc devices. - * People with broken devices are free to experiment as to what gives - * the best results for them. - * - * USLEEP_SLEEP should be a minimum seek time. - * - * USLEEP_POLL should be a maximum rotational latency. - */ -#ifndef USLEEP_SLEEP -/* 20 ms (reasonable hard disk speed) */ -#define USLEEP_SLEEP msecs_to_jiffies(20) -#endif -/* 300 RPM (floppy speed) */ -#ifndef USLEEP_POLL -#define USLEEP_POLL msecs_to_jiffies(200) -#endif -#ifndef USLEEP_WAITLONG -/* RvC: (reasonable time to wait on select error) */ -#define USLEEP_WAITLONG USLEEP_SLEEP -#endif -/* - * Function : int should_disconnect (unsigned char cmd) - * - * Purpose : decide whether a command would normally disconnect or - * not, since if it won't disconnect we should go to sleep. - * - * Input : cmd - opcode of SCSI command - * - * Returns : DISCONNECT_LONG if we should disconnect for a really long - * time (ie always, sleep, look for REQ active, sleep), - * DISCONNECT_TIME_TO_DATA if we would only disconnect for a normal - * time-to-data delay, DISCONNECT_NONE if this command would return - * immediately. - * - * Future sleep algorithms based on time to data can exploit - * something like this so they can differentiate between "normal" - * (ie, read, write, seek) and unusual commands (ie, * format). - * - * Note : We don't deal with commands that handle an immediate disconnect, - * - */ - -static int should_disconnect(unsigned char cmd) -{ - switch (cmd) { - case READ_6: - case WRITE_6: - case SEEK_6: - case READ_10: - case WRITE_10: - case SEEK_10: - return DISCONNECT_TIME_TO_DATA; - case FORMAT_UNIT: - case SEARCH_HIGH: - case SEARCH_LOW: - case SEARCH_EQUAL: - return DISCONNECT_LONG; - default: - return DISCONNECT_NONE; - } -} - -static void NCR5380_set_timer(struct NCR5380_hostdata *hostdata, unsigned long timeout) -{ - hostdata->time_expires = jiffies + timeout; - schedule_delayed_work(&hostdata->coroutine, timeout); -} - - -static int probe_irq __initdata = 0; +static int probe_irq __initdata; /** - * probe_intr - helper for IRQ autoprobe - * @irq: interrupt number - * @dev_id: unused - * @regs: unused + * probe_intr - helper for IRQ autoprobe + * @irq: interrupt number + * @dev_id: unused + * @regs: unused * - * Set a flag to indicate the IRQ in question was received. This is - * used by the IRQ probe code. + * Set a flag to indicate the IRQ in question was received. This is + * used by the IRQ probe code. */ - + static irqreturn_t __init probe_intr(int irq, void *dev_id) { probe_irq = irq; @@ -553,24 +398,20 @@ static irqreturn_t __init probe_intr(int irq, void *dev_id) } /** - * NCR5380_probe_irq - find the IRQ of an NCR5380 - * @instance: NCR5380 controller - * @possible: bitmask of ISA IRQ lines + * NCR5380_probe_irq - find the IRQ of an NCR5380 + * @instance: NCR5380 controller + * @possible: bitmask of ISA IRQ lines * - * Autoprobe for the IRQ line used by the NCR5380 by triggering an IRQ - * and then looking to see what interrupt actually turned up. - * - * Locks: none, irqs must be enabled on entry + * Autoprobe for the IRQ line used by the NCR5380 by triggering an IRQ + * and then looking to see what interrupt actually turned up. */ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance, int possible) { - NCR5380_local_declare(); - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; + struct NCR5380_hostdata *hostdata = shost_priv(instance); unsigned long timeout; int trying_irqs, i, mask; - NCR5380_setup(instance); for (trying_irqs = 0, i = 1, mask = 2; i < 16; ++i, mask <<= 1) if ((mask & possible) && (request_irq(i, &probe_intr, 0, "NCR-probe", NULL) == 0)) @@ -581,7 +422,7 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance, /* * A interrupt is triggered whenever BSY = false, SEL = true - * and a bit set in the SELECT_ENABLE_REG is asserted on the + * and a bit set in the SELECT_ENABLE_REG is asserted on the * SCSI bus. * * Note that the bus is only driven when the phase control signals @@ -596,7 +437,7 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance, while (probe_irq == NO_IRQ && time_before(jiffies, timeout)) schedule_timeout_uninterruptible(1); - + NCR5380_write(SELECT_ENABLE_REG, 0); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); @@ -608,12 +449,10 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance, } /** - * NCR58380_info - report driver and host information - * @instance: relevant scsi host instance - * - * For use as the host template info() handler. + * NCR58380_info - report driver and host information + * @instance: relevant scsi host instance * - * Locks: none + * For use as the host template info() handler. */ static const char *NCR5380_info(struct Scsi_Host *instance) @@ -633,20 +472,14 @@ static void prepare_info(struct Scsi_Host *instance) "can_queue %d, cmd_per_lun %d, " "sg_tablesize %d, this_id %d, " "flags { %s%s%s}, " -#if defined(USLEEP_POLL) && defined(USLEEP_WAITLONG) - "USLEEP_POLL %lu, USLEEP_WAITLONG %lu, " -#endif "options { %s} ", instance->hostt->name, instance->io_port, instance->n_io_port, instance->base, instance->irq, instance->can_queue, instance->cmd_per_lun, instance->sg_tablesize, instance->this_id, - hostdata->flags & FLAG_NCR53C400 ? "NCR53C400 " : "", - hostdata->flags & FLAG_DTC3181E ? "DTC3181E " : "", + hostdata->flags & FLAG_NO_DMA_FIXUP ? "NO_DMA_FIXUP " : "", hostdata->flags & FLAG_NO_PSEUDO_DMA ? "NO_PSEUDO_DMA " : "", -#if defined(USLEEP_POLL) && defined(USLEEP_WAITLONG) - USLEEP_POLL, USLEEP_WAITLONG, -#endif + hostdata->flags & FLAG_TOSHIBA_DELAY ? "TOSHIBA_DELAY " : "", #ifdef AUTOPROBE_IRQ "AUTOPROBE_IRQ " #endif @@ -665,46 +498,10 @@ static void prepare_info(struct Scsi_Host *instance) #ifdef PSEUDO_DMA "PSEUDO_DMA " #endif -#ifdef UNSAFE - "UNSAFE " -#endif -#ifdef NCR53C400 - "NCR53C400 " -#endif ""); } -/** - * NCR5380_print_status - dump controller info - * @instance: controller to dump - * - * Print commands in the various queues, called from NCR5380_abort - * and NCR5380_debug to aid debugging. - * - * Locks: called functions disable irqs - */ - -static void NCR5380_print_status(struct Scsi_Host *instance) -{ - NCR5380_dprint(NDEBUG_ANY, instance); - NCR5380_dprint_phase(NDEBUG_ANY, instance); -} - #ifdef PSEUDO_DMA -/******************************************/ -/* - * /proc/scsi/[dtc pas16 t128 generic]/[0-ASC_NUM_BOARD_SUPPORTED] - * - * *buffer: I/O buffer - * **start: if inout == FALSE pointer into buffer where user read should start - * offset: current offset - * length: length of buffer - * hostno: Scsi_Host host_no - * inout: TRUE - user is writing; FALSE - user is reading - * - * Return the number of bytes read from or written - */ - static int __maybe_unused NCR5380_write_info(struct Scsi_Host *instance, char *buffer, int length) { @@ -714,104 +511,41 @@ static int __maybe_unused NCR5380_write_info(struct Scsi_Host *instance, hostdata->spin_max_w = 0; return 0; } -#endif - -static -void lprint_Scsi_Cmnd(struct scsi_cmnd *cmd, struct seq_file *m); -static -void lprint_command(unsigned char *cmd, struct seq_file *m); -static -void lprint_opcode(int opcode, struct seq_file *m); static int __maybe_unused NCR5380_show_info(struct seq_file *m, - struct Scsi_Host *instance) + struct Scsi_Host *instance) { - struct NCR5380_hostdata *hostdata; - struct scsi_cmnd *ptr; - - hostdata = (struct NCR5380_hostdata *) instance->hostdata; + struct NCR5380_hostdata *hostdata = shost_priv(instance); -#ifdef PSEUDO_DMA seq_printf(m, "Highwater I/O busy spin counts: write %d, read %d\n", hostdata->spin_max_w, hostdata->spin_max_r); -#endif - spin_lock_irq(instance->host_lock); - if (!hostdata->connected) - seq_printf(m, "scsi%d: no currently connected command\n", instance->host_no); - else - lprint_Scsi_Cmnd((struct scsi_cmnd *) hostdata->connected, m); - seq_printf(m, "scsi%d: issue_queue\n", instance->host_no); - for (ptr = (struct scsi_cmnd *) hostdata->issue_queue; ptr; ptr = (struct scsi_cmnd *) ptr->host_scribble) - lprint_Scsi_Cmnd(ptr, m); - - seq_printf(m, "scsi%d: disconnected_queue\n", instance->host_no); - for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr; ptr = (struct scsi_cmnd *) ptr->host_scribble) - lprint_Scsi_Cmnd(ptr, m); - spin_unlock_irq(instance->host_lock); return 0; } - -static void lprint_Scsi_Cmnd(struct scsi_cmnd *cmd, struct seq_file *m) -{ - seq_printf(m, "scsi%d : destination target %d, lun %llu\n", cmd->device->host->host_no, cmd->device->id, cmd->device->lun); - seq_puts(m, " command = "); - lprint_command(cmd->cmnd, m); -} - -static void lprint_command(unsigned char *command, struct seq_file *m) -{ - int i, s; - lprint_opcode(command[0], m); - for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i) - seq_printf(m, "%02x ", command[i]); - seq_putc(m, '\n'); -} - -static void lprint_opcode(int opcode, struct seq_file *m) -{ - seq_printf(m, "%2d (0x%02x)", opcode, opcode); -} - +#endif /** - * NCR5380_init - initialise an NCR5380 - * @instance: adapter to configure - * @flags: control flags + * NCR5380_init - initialise an NCR5380 + * @instance: adapter to configure + * @flags: control flags * - * Initializes *instance and corresponding 5380 chip, - * with flags OR'd into the initial flags value. + * Initializes *instance and corresponding 5380 chip, + * with flags OR'd into the initial flags value. * - * Notes : I assume that the host, hostno, and id bits have been - * set correctly. I don't care about the irq and other fields. + * Notes : I assume that the host, hostno, and id bits have been + * set correctly. I don't care about the irq and other fields. * - * Returns 0 for success - * - * Locks: interrupts must be enabled when we are called + * Returns 0 for success */ static int NCR5380_init(struct Scsi_Host *instance, int flags) { - NCR5380_local_declare(); - int i, pass; - unsigned long timeout; - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; - - if(in_interrupt()) - printk(KERN_ERR "NCR5380_init called with interrupts off!\n"); - /* - * On NCR53C400 boards, NCR5380 registers are mapped 8 past - * the base address. - */ - -#ifdef NCR53C400 - if (flags & FLAG_NCR53C400) - instance->NCR5380_instance_name += NCR53C400_address_adjust; -#endif - - NCR5380_setup(instance); + struct NCR5380_hostdata *hostdata = shost_priv(instance); + int i; + unsigned long deadline; - hostdata->aborted = 0; + hostdata->host = instance; hostdata->id_mask = 1 << instance->this_id; + hostdata->id_higher_mask = 0; for (i = hostdata->id_mask; i <= 0x80; i <<= 1) if (i > hostdata->id_mask) hostdata->id_higher_mask |= i; @@ -820,21 +554,21 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags) #ifdef REAL_DMA hostdata->dmalen = 0; #endif - hostdata->targets_present = 0; + spin_lock_init(&hostdata->lock); hostdata->connected = NULL; - hostdata->issue_queue = NULL; - hostdata->disconnected_queue = NULL; - - INIT_DELAYED_WORK(&hostdata->coroutine, NCR5380_main); - - /* The CHECK code seems to break the 53C400. Will check it later maybe */ - if (flags & FLAG_NCR53C400) - hostdata->flags = FLAG_HAS_LAST_BYTE_SENT | flags; - else - hostdata->flags = FLAG_CHECK_LAST_BYTE_SENT | flags; + hostdata->sensing = NULL; + INIT_LIST_HEAD(&hostdata->autosense); + INIT_LIST_HEAD(&hostdata->unissued); + INIT_LIST_HEAD(&hostdata->disconnected); - hostdata->host = instance; - hostdata->time_expires = 0; + hostdata->flags = flags; + + INIT_WORK(&hostdata->main_task, NCR5380_main); + hostdata->work_q = alloc_workqueue("ncr5380_%d", + WQ_UNBOUND | WQ_MEM_RECLAIM, + 1, instance->host_no); + if (!hostdata->work_q) + return -ENOMEM; prepare_info(instance); @@ -843,43 +577,69 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags) NCR5380_write(TARGET_COMMAND_REG, 0); NCR5380_write(SELECT_ENABLE_REG, 0); -#ifdef NCR53C400 - if (hostdata->flags & FLAG_NCR53C400) { - NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE); - } -#endif + /* Calibrate register polling loop */ + i = 0; + deadline = jiffies + 1; + do { + cpu_relax(); + } while (time_is_after_jiffies(deadline)); + deadline += msecs_to_jiffies(256); + do { + NCR5380_read(STATUS_REG); + ++i; + cpu_relax(); + } while (time_is_after_jiffies(deadline)); + hostdata->accesses_per_ms = i / 256; - /* - * Detect and correct bus wedge problems. - * - * If the system crashed, it may have crashed in a state - * where a SCSI command was still executing, and the - * SCSI bus is not in a BUS FREE STATE. - * - * If this is the case, we'll try to abort the currently - * established nexus which we know nothing about, and that - * failing, do a hard reset of the SCSI bus - */ + return 0; +} + +/** + * NCR5380_maybe_reset_bus - Detect and correct bus wedge problems. + * @instance: adapter to check + * + * If the system crashed, it may have crashed with a connected target and + * the SCSI bus busy. Check for BUS FREE phase. If not, try to abort the + * currently established nexus, which we know nothing about. Failing that + * do a bus reset. + * + * Note that a bus reset will cause the chip to assert IRQ. + * + * Returns 0 if successful, otherwise -ENXIO. + */ + +static int NCR5380_maybe_reset_bus(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + int pass; for (pass = 1; (NCR5380_read(STATUS_REG) & SR_BSY) && pass <= 6; ++pass) { switch (pass) { case 1: case 3: case 5: - printk(KERN_INFO "scsi%d: SCSI bus busy, waiting up to five seconds\n", instance->host_no); - timeout = jiffies + 5 * HZ; - NCR5380_poll_politely(instance, STATUS_REG, SR_BSY, 0, 5*HZ); + shost_printk(KERN_ERR, instance, "SCSI bus busy, waiting up to five seconds\n"); + NCR5380_poll_politely(instance, + STATUS_REG, SR_BSY, 0, 5 * HZ); break; case 2: - printk(KERN_WARNING "scsi%d: bus busy, attempting abort\n", instance->host_no); + shost_printk(KERN_ERR, instance, "bus busy, attempting abort\n"); do_abort(instance); break; case 4: - printk(KERN_WARNING "scsi%d: bus busy, attempting reset\n", instance->host_no); + shost_printk(KERN_ERR, instance, "bus busy, attempting reset\n"); do_reset(instance); + /* Wait after a reset; the SCSI standard calls for + * 250ms, we wait 500ms to be on the safe side. + * But some Toshiba CD-ROMs need ten times that. + */ + if (hostdata->flags & FLAG_TOSHIBA_DELAY) + msleep(2500); + else + msleep(500); break; case 6: - printk(KERN_ERR "scsi%d: bus locked solid or invalid override\n", instance->host_no); + shost_printk(KERN_ERR, instance, "bus locked solid\n"); return -ENXIO; } } @@ -887,450 +647,513 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags) } /** - * NCR5380_exit - remove an NCR5380 - * @instance: adapter to remove + * NCR5380_exit - remove an NCR5380 + * @instance: adapter to remove + * + * Assumes that no more work can be queued (e.g. by NCR5380_intr). */ static void NCR5380_exit(struct Scsi_Host *instance) { - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; + struct NCR5380_hostdata *hostdata = shost_priv(instance); - cancel_delayed_work_sync(&hostdata->coroutine); + cancel_work_sync(&hostdata->main_task); + destroy_workqueue(hostdata->work_q); } /** - * NCR5380_queue_command - queue a command - * @cmd: SCSI command - * @done: completion handler - * - * cmd is added to the per instance issue_queue, with minor - * twiddling done to the host specific fields of cmd. If the - * main coroutine is not running, it is restarted. + * complete_cmd - finish processing a command and return it to the SCSI ML + * @instance: the host instance + * @cmd: command to complete + */ + +static void complete_cmd(struct Scsi_Host *instance, + struct scsi_cmnd *cmd) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + + dsprintk(NDEBUG_QUEUES, instance, "complete_cmd: cmd %p\n", cmd); + + if (hostdata->sensing == cmd) { + /* Autosense processing ends here */ + if ((cmd->result & 0xff) != SAM_STAT_GOOD) { + scsi_eh_restore_cmnd(cmd, &hostdata->ses); + set_host_byte(cmd, DID_ERROR); + } else + scsi_eh_restore_cmnd(cmd, &hostdata->ses); + hostdata->sensing = NULL; + } + + hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun); + + cmd->scsi_done(cmd); +} + +/** + * NCR5380_queue_command - queue a command + * @instance: the relevant SCSI adapter + * @cmd: SCSI command * - * Locks: host lock taken by caller + * cmd is added to the per-instance issue queue, with minor + * twiddling done to the host specific fields of cmd. If the + * main coroutine is not running, it is restarted. */ -static int NCR5380_queue_command_lck(struct scsi_cmnd *cmd, void (*done) (struct scsi_cmnd *)) +static int NCR5380_queue_command(struct Scsi_Host *instance, + struct scsi_cmnd *cmd) { - struct Scsi_Host *instance = cmd->device->host; - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; - struct scsi_cmnd *tmp; + struct NCR5380_hostdata *hostdata = shost_priv(instance); + struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); + unsigned long flags; #if (NDEBUG & NDEBUG_NO_WRITE) switch (cmd->cmnd[0]) { case WRITE_6: case WRITE_10: - printk("scsi%d : WRITE attempted with NO_WRITE debugging flag set\n", instance->host_no); + shost_printk(KERN_DEBUG, instance, "WRITE attempted with NDEBUG_NO_WRITE set\n"); cmd->result = (DID_ERROR << 16); - done(cmd); + cmd->scsi_done(cmd); return 0; } -#endif /* (NDEBUG & NDEBUG_NO_WRITE) */ - - /* - * We use the host_scribble field as a pointer to the next command - * in a queue - */ +#endif /* (NDEBUG & NDEBUG_NO_WRITE) */ - cmd->host_scribble = NULL; - cmd->scsi_done = done; cmd->result = 0; - /* - * Insert the cmd into the issue queue. Note that REQUEST SENSE + spin_lock_irqsave(&hostdata->lock, flags); + + /* + * Insert the cmd into the issue queue. Note that REQUEST SENSE * commands are added to the head of the queue since any command will - * clear the contingent allegiance condition that exists and the + * clear the contingent allegiance condition that exists and the * sense data is only guaranteed to be valid while the condition exists. */ - if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) { - LIST(cmd, hostdata->issue_queue); - cmd->host_scribble = (unsigned char *) hostdata->issue_queue; - hostdata->issue_queue = cmd; - } else { - for (tmp = (struct scsi_cmnd *) hostdata->issue_queue; tmp->host_scribble; tmp = (struct scsi_cmnd *) tmp->host_scribble); - LIST(cmd, tmp); - tmp->host_scribble = (unsigned char *) cmd; - } - dprintk(NDEBUG_QUEUES, "scsi%d : command added to %s of queue\n", instance->host_no, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail"); + if (cmd->cmnd[0] == REQUEST_SENSE) + list_add(&ncmd->list, &hostdata->unissued); + else + list_add_tail(&ncmd->list, &hostdata->unissued); + + spin_unlock_irqrestore(&hostdata->lock, flags); + + dsprintk(NDEBUG_QUEUES, instance, "command %p added to %s of queue\n", + cmd, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail"); - /* Run the coroutine if it isn't already running. */ /* Kick off command processing */ - schedule_delayed_work(&hostdata->coroutine, 0); + queue_work(hostdata->work_q, &hostdata->main_task); return 0; } -static DEF_SCSI_QCMD(NCR5380_queue_command) +/** + * dequeue_next_cmd - dequeue a command for processing + * @instance: the scsi host instance + * + * Priority is given to commands on the autosense queue. These commands + * need autosense because of a CHECK CONDITION result. + * + * Returns a command pointer if a command is found for a target that is + * not already busy. Otherwise returns NULL. + */ + +static struct scsi_cmnd *dequeue_next_cmd(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + struct NCR5380_cmd *ncmd; + struct scsi_cmnd *cmd; + + if (list_empty(&hostdata->autosense)) { + list_for_each_entry(ncmd, &hostdata->unissued, list) { + cmd = NCR5380_to_scmd(ncmd); + dsprintk(NDEBUG_QUEUES, instance, "dequeue: cmd=%p target=%d busy=0x%02x lun=%llu\n", + cmd, scmd_id(cmd), hostdata->busy[scmd_id(cmd)], cmd->device->lun); + + if (!(hostdata->busy[scmd_id(cmd)] & (1 << cmd->device->lun))) { + list_del(&ncmd->list); + dsprintk(NDEBUG_QUEUES, instance, + "dequeue: removed %p from issue queue\n", cmd); + return cmd; + } + } + } else { + /* Autosense processing begins here */ + ncmd = list_first_entry(&hostdata->autosense, + struct NCR5380_cmd, list); + list_del(&ncmd->list); + cmd = NCR5380_to_scmd(ncmd); + dsprintk(NDEBUG_QUEUES, instance, + "dequeue: removed %p from autosense queue\n", cmd); + scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0); + hostdata->sensing = cmd; + return cmd; + } + return NULL; +} + +static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); + + if (hostdata->sensing) { + scsi_eh_restore_cmnd(cmd, &hostdata->ses); + list_add(&ncmd->list, &hostdata->autosense); + hostdata->sensing = NULL; + } else + list_add(&ncmd->list, &hostdata->unissued); +} /** - * NCR5380_main - NCR state machines - * - * NCR5380_main is a coroutine that runs as long as more work can - * be done on the NCR5380 host adapters in a system. Both - * NCR5380_queue_command() and NCR5380_intr() will try to start it - * in case it is not running. - * - * Locks: called as its own thread with no locks held. Takes the - * host lock and called routines may take the isa dma lock. + * NCR5380_main - NCR state machines + * + * NCR5380_main is a coroutine that runs as long as more work can + * be done on the NCR5380 host adapters in a system. Both + * NCR5380_queue_command() and NCR5380_intr() will try to start it + * in case it is not running. */ static void NCR5380_main(struct work_struct *work) { struct NCR5380_hostdata *hostdata = - container_of(work, struct NCR5380_hostdata, coroutine.work); + container_of(work, struct NCR5380_hostdata, main_task); struct Scsi_Host *instance = hostdata->host; - struct scsi_cmnd *tmp, *prev; + struct scsi_cmnd *cmd; int done; - - spin_lock_irq(instance->host_lock); + do { - /* Lock held here */ done = 1; - if (!hostdata->connected && !hostdata->selecting) { - dprintk(NDEBUG_MAIN, "scsi%d : not connected\n", instance->host_no); - /* - * Search through the issue_queue for a command destined - * for a target that's not busy. - */ - for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, prev = NULL; tmp; prev = tmp, tmp = (struct scsi_cmnd *) tmp->host_scribble) - { - if (prev != tmp) - dprintk(NDEBUG_LISTS, "MAIN tmp=%p target=%d busy=%d lun=%llu\n", tmp, tmp->device->id, hostdata->busy[tmp->device->id], tmp->device->lun); - /* When we find one, remove it from the issue queue. */ - if (!(hostdata->busy[tmp->device->id] & - (1 << (u8)(tmp->device->lun & 0xff)))) { - if (prev) { - REMOVE(prev, prev->host_scribble, tmp, tmp->host_scribble); - prev->host_scribble = tmp->host_scribble; - } else { - REMOVE(-1, hostdata->issue_queue, tmp, tmp->host_scribble); - hostdata->issue_queue = (struct scsi_cmnd *) tmp->host_scribble; - } - tmp->host_scribble = NULL; - /* - * Attempt to establish an I_T_L nexus here. - * On success, instance->hostdata->connected is set. - * On failure, we must add the command back to the - * issue queue so we can keep trying. - */ - dprintk(NDEBUG_MAIN|NDEBUG_QUEUES, "scsi%d : main() : command for target %d lun %llu removed from issue_queue\n", instance->host_no, tmp->device->id, tmp->device->lun); - - /* - * A successful selection is defined as one that - * leaves us with the command connected and - * in hostdata->connected, OR has terminated the - * command. - * - * With successful commands, we fall through - * and see if we can do an information transfer, - * with failures we will restart. - */ - hostdata->selecting = NULL; - /* RvC: have to preset this to indicate a new command is being performed */ + spin_lock_irq(&hostdata->lock); + while (!hostdata->connected && + (cmd = dequeue_next_cmd(instance))) { - /* - * REQUEST SENSE commands are issued without tagged - * queueing, even on SCSI-II devices because the - * contingent allegiance condition exists for the - * entire unit. - */ + dsprintk(NDEBUG_MAIN, instance, "main: dequeued %p\n", cmd); - if (!NCR5380_select(instance, tmp)) { - break; - } else { - LIST(tmp, hostdata->issue_queue); - tmp->host_scribble = (unsigned char *) hostdata->issue_queue; - hostdata->issue_queue = tmp; - done = 0; - dprintk(NDEBUG_MAIN|NDEBUG_QUEUES, "scsi%d : main(): select() failed, returned to issue_queue\n", instance->host_no); - } - /* lock held here still */ - } /* if target/lun is not busy */ - } /* for */ - /* exited locked */ - } /* if (!hostdata->connected) */ - if (hostdata->selecting) { - tmp = (struct scsi_cmnd *) hostdata->selecting; - /* Selection will drop and retake the lock */ - if (!NCR5380_select(instance, tmp)) { - /* Ok ?? */ + /* + * Attempt to establish an I_T_L nexus here. + * On success, instance->hostdata->connected is set. + * On failure, we must add the command back to the + * issue queue so we can keep trying. + */ + /* + * REQUEST SENSE commands are issued without tagged + * queueing, even on SCSI-II devices because the + * contingent allegiance condition exists for the + * entire unit. + */ + + cmd = NCR5380_select(instance, cmd); + if (!cmd) { + dsprintk(NDEBUG_MAIN, instance, "main: select complete\n"); } else { - /* RvC: device failed, so we wait a long time - this is needed for Mustek scanners, that - do not respond to commands immediately - after a scan */ - printk(KERN_DEBUG "scsi%d: device %d did not respond in time\n", instance->host_no, tmp->device->id); - LIST(tmp, hostdata->issue_queue); - tmp->host_scribble = (unsigned char *) hostdata->issue_queue; - hostdata->issue_queue = tmp; - NCR5380_set_timer(hostdata, USLEEP_WAITLONG); + dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES, instance, + "main: select failed, returning %p to queue\n", cmd); + requeue_cmd(instance, cmd); } - } /* if hostdata->selecting */ + } if (hostdata->connected #ifdef REAL_DMA && !hostdata->dmalen #endif - && (!hostdata->time_expires || time_before_eq(hostdata->time_expires, jiffies)) ) { - dprintk(NDEBUG_MAIN, "scsi%d : main() : performing information transfer\n", instance->host_no); + dsprintk(NDEBUG_MAIN, instance, "main: performing information transfer\n"); NCR5380_information_transfer(instance); - dprintk(NDEBUG_MAIN, "scsi%d : main() : done set false\n", instance->host_no); done = 0; - } else - break; + } + spin_unlock_irq(&hostdata->lock); + if (!done) + cond_resched(); } while (!done); - - spin_unlock_irq(instance->host_lock); } #ifndef DONT_USE_INTR /** - * NCR5380_intr - generic NCR5380 irq handler - * @irq: interrupt number - * @dev_id: device info - * - * Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses - * from the disconnected queue, and restarting NCR5380_main() - * as required. - * - * Locks: takes the needed instance locks + * NCR5380_intr - generic NCR5380 irq handler + * @irq: interrupt number + * @dev_id: device info + * + * Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses + * from the disconnected queue, and restarting NCR5380_main() + * as required. + * + * The chip can assert IRQ in any of six different conditions. The IRQ flag + * is then cleared by reading the Reset Parity/Interrupt Register (RPIR). + * Three of these six conditions are latched in the Bus and Status Register: + * - End of DMA (cleared by ending DMA Mode) + * - Parity error (cleared by reading RPIR) + * - Loss of BSY (cleared by reading RPIR) + * Two conditions have flag bits that are not latched: + * - Bus phase mismatch (non-maskable in DMA Mode, cleared by ending DMA Mode) + * - Bus reset (non-maskable) + * The remaining condition has no flag bit at all: + * - Selection/reselection + * + * Hence, establishing the cause(s) of any interrupt is partly guesswork. + * In "The DP8490 and DP5380 Comparison Guide", National Semiconductor + * claimed that "the design of the [DP8490] interrupt logic ensures + * interrupts will not be lost (they can be on the DP5380)." + * The L5380/53C80 datasheet from LOGIC Devices has more details. + * + * Checking for bus reset by reading RST is futile because of interrupt + * latency, but a bus reset will reset chip logic. Checking for parity error + * is unnecessary because that interrupt is never enabled. A Loss of BSY + * condition will clear DMA Mode. We can tell when this occurs because the + * the Busy Monitor interrupt is enabled together with DMA Mode. */ -static irqreturn_t NCR5380_intr(int dummy, void *dev_id) +static irqreturn_t NCR5380_intr(int irq, void *dev_id) { - NCR5380_local_declare(); struct Scsi_Host *instance = dev_id; - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; - int done; + struct NCR5380_hostdata *hostdata = shost_priv(instance); + int handled = 0; unsigned char basr; unsigned long flags; - dprintk(NDEBUG_INTR, "scsi : NCR5380 irq %d triggered\n", - instance->irq); + spin_lock_irqsave(&hostdata->lock, flags); + + basr = NCR5380_read(BUS_AND_STATUS_REG); + if (basr & BASR_IRQ) { + unsigned char mr = NCR5380_read(MODE_REG); + unsigned char sr = NCR5380_read(STATUS_REG); + + dsprintk(NDEBUG_INTR, instance, "IRQ %d, BASR 0x%02x, SR 0x%02x, MR 0x%02x\n", + irq, basr, sr, mr); - do { - done = 1; - spin_lock_irqsave(instance->host_lock, flags); - /* Look for pending interrupts */ - NCR5380_setup(instance); - basr = NCR5380_read(BUS_AND_STATUS_REG); - /* XXX dispatch to appropriate routine if found and done=0 */ - if (basr & BASR_IRQ) { - NCR5380_dprint(NDEBUG_INTR, instance); - if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) { - done = 0; - dprintk(NDEBUG_INTR, "scsi%d : SEL interrupt\n", instance->host_no); - NCR5380_reselect(instance); - (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG); - } else if (basr & BASR_PARITY_ERROR) { - dprintk(NDEBUG_INTR, "scsi%d : PARITY interrupt\n", instance->host_no); - (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG); - } else if ((NCR5380_read(STATUS_REG) & SR_RST) == SR_RST) { - dprintk(NDEBUG_INTR, "scsi%d : RESET interrupt\n", instance->host_no); - (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG); - } else { #if defined(REAL_DMA) - /* - * We should only get PHASE MISMATCH and EOP interrupts - * if we have DMA enabled, so do a sanity check based on - * the current setting of the MODE register. - */ + if ((mr & MR_DMA_MODE) || (mr & MR_MONITOR_BSY)) { + /* Probably End of DMA, Phase Mismatch or Loss of BSY. + * We ack IRQ after clearing Mode Register. Workarounds + * for End of DMA errata need to happen in DMA Mode. + */ - if ((NCR5380_read(MODE_REG) & MR_DMA) && ((basr & BASR_END_DMA_TRANSFER) || !(basr & BASR_PHASE_MATCH))) { - int transferred; + dsprintk(NDEBUG_INTR, instance, "interrupt in DMA mode\n"); - if (!hostdata->connected) - panic("scsi%d : received end of DMA interrupt with no connected cmd\n", instance->hostno); + int transferred; - transferred = (hostdata->dmalen - NCR5380_dma_residual(instance)); - hostdata->connected->SCp.this_residual -= transferred; - hostdata->connected->SCp.ptr += transferred; - hostdata->dmalen = 0; + if (!hostdata->connected) + panic("scsi%d : DMA interrupt with no connected cmd\n", + instance->hostno); - (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG); - - /* FIXME: we need to poll briefly then defer a workqueue task ! */ - NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, BASR_ACK, 0, 2*HZ); + transferred = hostdata->dmalen - NCR5380_dma_residual(instance); + hostdata->connected->SCp.this_residual -= transferred; + hostdata->connected->SCp.ptr += transferred; + hostdata->dmalen = 0; - NCR5380_write(MODE_REG, MR_BASE); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - } -#else - dprintk(NDEBUG_INTR, "scsi : unknown interrupt, BASR 0x%X, MR 0x%X, SR 0x%x\n", basr, NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG)); - (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG); -#endif + /* FIXME: we need to poll briefly then defer a workqueue task ! */ + NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, BASR_ACK, 0, 2 * HZ); + + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + NCR5380_write(MODE_REG, MR_BASE); + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + } else +#endif /* REAL_DMA */ + if ((NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_mask) && + (sr & (SR_SEL | SR_IO | SR_BSY | SR_RST)) == (SR_SEL | SR_IO)) { + /* Probably reselected */ + NCR5380_write(SELECT_ENABLE_REG, 0); + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + + dsprintk(NDEBUG_INTR, instance, "interrupt with SEL and IO\n"); + + if (!hostdata->connected) { + NCR5380_reselect(instance); + queue_work(hostdata->work_q, &hostdata->main_task); } - } /* if BASR_IRQ */ - spin_unlock_irqrestore(instance->host_lock, flags); - if(!done) - schedule_delayed_work(&hostdata->coroutine, 0); - } while (!done); - return IRQ_HANDLED; + if (!hostdata->connected) + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); + } else { + /* Probably Bus Reset */ + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + + dsprintk(NDEBUG_INTR, instance, "unknown interrupt\n"); + } + handled = 1; + } else { + shost_printk(KERN_NOTICE, instance, "interrupt without IRQ bit\n"); + } + + spin_unlock_irqrestore(&hostdata->lock, flags); + + return IRQ_RETVAL(handled); } -#endif +#endif -/* +/* * Function : int NCR5380_select(struct Scsi_Host *instance, - * struct scsi_cmnd *cmd) + * struct scsi_cmnd *cmd) * * Purpose : establishes I_T_L or I_T_L_Q nexus for new or existing command, - * including ARBITRATION, SELECTION, and initial message out for - * IDENTIFY and queue messages. - * - * Inputs : instance - instantiation of the 5380 driver on which this - * target lives, cmd - SCSI command to execute. - * - * Returns : -1 if selection could not execute for some reason, - * 0 if selection succeeded or failed because the target - * did not respond. - * - * Side effects : - * If bus busy, arbitration failed, etc, NCR5380_select() will exit - * with registers as they should have been on entry - ie - * SELECT_ENABLE will be set appropriately, the NCR5380 - * will cease to drive any SCSI bus signals. - * - * If successful : I_T_L or I_T_L_Q nexus will be established, - * instance->connected will be set to cmd. - * SELECT interrupt will be disabled. - * - * If failed (no target) : cmd->scsi_done() will be called, and the - * cmd->result host byte set to DID_BAD_TARGET. - * - * Locks: caller holds hostdata lock in IRQ mode + * including ARBITRATION, SELECTION, and initial message out for + * IDENTIFY and queue messages. + * + * Inputs : instance - instantiation of the 5380 driver on which this + * target lives, cmd - SCSI command to execute. + * + * Returns cmd if selection failed but should be retried, + * NULL if selection failed and should not be retried, or + * NULL if selection succeeded (hostdata->connected == cmd). + * + * Side effects : + * If bus busy, arbitration failed, etc, NCR5380_select() will exit + * with registers as they should have been on entry - ie + * SELECT_ENABLE will be set appropriately, the NCR5380 + * will cease to drive any SCSI bus signals. + * + * If successful : I_T_L or I_T_L_Q nexus will be established, + * instance->connected will be set to cmd. + * SELECT interrupt will be disabled. + * + * If failed (no target) : cmd->scsi_done() will be called, and the + * cmd->result host byte set to DID_BAD_TARGET. */ - -static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) + +static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance, + struct scsi_cmnd *cmd) { - NCR5380_local_declare(); - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; + struct NCR5380_hostdata *hostdata = shost_priv(instance); unsigned char tmp[3], phase; unsigned char *data; int len; - unsigned long timeout; - unsigned char value; int err; - NCR5380_setup(instance); - - if (hostdata->selecting) - goto part2; - - hostdata->restart_select = 0; NCR5380_dprint(NDEBUG_ARBITRATION, instance); - dprintk(NDEBUG_ARBITRATION, "scsi%d : starting arbitration, id = %d\n", instance->host_no, instance->this_id); + dsprintk(NDEBUG_ARBITRATION, instance, "starting arbitration, id = %d\n", + instance->this_id); + + /* + * Arbitration and selection phases are slow and involve dropping the + * lock, so we have to watch out for EH. An exception handler may + * change 'selecting' to NULL. This function will then return NULL + * so that the caller will forget about 'cmd'. (During information + * transfer phases, EH may change 'connected' to NULL.) + */ + hostdata->selecting = cmd; - /* - * Set the phase bits to 0, otherwise the NCR5380 won't drive the + /* + * Set the phase bits to 0, otherwise the NCR5380 won't drive the * data bus during SELECTION. */ NCR5380_write(TARGET_COMMAND_REG, 0); - /* + /* * Start arbitration. */ NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask); NCR5380_write(MODE_REG, MR_ARBITRATE); + /* The chip now waits for BUS FREE phase. Then after the 800 ns + * Bus Free Delay, arbitration will begin. + */ - /* We can be relaxed here, interrupts are on, we are - in workqueue context, the birds are singing in the trees */ - spin_unlock_irq(instance->host_lock); - err = NCR5380_poll_politely(instance, INITIATOR_COMMAND_REG, ICR_ARBITRATION_PROGRESS, ICR_ARBITRATION_PROGRESS, 5*HZ); - spin_lock_irq(instance->host_lock); + spin_unlock_irq(&hostdata->lock); + err = NCR5380_poll_politely2(instance, MODE_REG, MR_ARBITRATE, 0, + INITIATOR_COMMAND_REG, ICR_ARBITRATION_PROGRESS, + ICR_ARBITRATION_PROGRESS, HZ); + spin_lock_irq(&hostdata->lock); + if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE)) { + /* Reselection interrupt */ + goto out; + } if (err < 0) { - printk(KERN_DEBUG "scsi: arbitration timeout at %d\n", __LINE__); NCR5380_write(MODE_REG, MR_BASE); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - goto failed; + shost_printk(KERN_ERR, instance, + "select: arbitration timeout\n"); + goto out; } + spin_unlock_irq(&hostdata->lock); - dprintk(NDEBUG_ARBITRATION, "scsi%d : arbitration complete\n", instance->host_no); - - /* - * The arbitration delay is 2.2us, but this is a minimum and there is - * no maximum so we can safely sleep for ceil(2.2) usecs to accommodate - * the integral nature of udelay(). - * - */ - + /* The SCSI-2 arbitration delay is 2.4 us */ udelay(3); /* Check for lost arbitration */ - if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) || (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) || (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) { - NCR5380_write(MODE_REG, MR_BASE); - dprintk(NDEBUG_ARBITRATION, "scsi%d : lost arbitration, deasserting MR_ARBITRATE\n", instance->host_no); - goto failed; - } - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_SEL); - - if (!(hostdata->flags & FLAG_DTC3181E) && - /* RvC: DTC3181E has some trouble with this - * so we simply removed it. Seems to work with - * only Mustek scanner attached - */ + if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) || + (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) || (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) { NCR5380_write(MODE_REG, MR_BASE); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - dprintk(NDEBUG_ARBITRATION, "scsi%d : lost arbitration, deasserting ICR_ASSERT_SEL\n", instance->host_no); - goto failed; + dsprintk(NDEBUG_ARBITRATION, instance, "lost arbitration, deasserting MR_ARBITRATE\n"); + spin_lock_irq(&hostdata->lock); + goto out; } - /* - * Again, bus clear + bus settle time is 1.2us, however, this is + + /* After/during arbitration, BSY should be asserted. + * IBM DPES-31080 Version S31Q works now + * Tnx to Thomas_Roesch@m2.maus.de for finding this! (Roman) + */ + NCR5380_write(INITIATOR_COMMAND_REG, + ICR_BASE | ICR_ASSERT_SEL | ICR_ASSERT_BSY); + + /* + * Again, bus clear + bus settle time is 1.2us, however, this is * a minimum so we'll udelay ceil(1.2) */ - udelay(2); + if (hostdata->flags & FLAG_TOSHIBA_DELAY) + udelay(15); + else + udelay(2); + + spin_lock_irq(&hostdata->lock); + + /* NCR5380_reselect() clears MODE_REG after a reselection interrupt */ + if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE)) + goto out; + + if (!hostdata->selecting) { + NCR5380_write(MODE_REG, MR_BASE); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + goto out; + } - dprintk(NDEBUG_ARBITRATION, "scsi%d : won arbitration\n", instance->host_no); + dsprintk(NDEBUG_ARBITRATION, instance, "won arbitration\n"); - /* - * Now that we have won arbitration, start Selection process, asserting + /* + * Now that we have won arbitration, start Selection process, asserting * the host and target ID's on the SCSI bus. */ - NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << scmd_id(cmd)))); + NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask | (1 << scmd_id(cmd))); - /* + /* * Raise ATN while SEL is true before BSY goes false from arbitration, * since this is the only way to guarantee that we'll get a MESSAGE OUT * phase immediately after selection. */ - NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_BSY | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL)); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY | + ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL); NCR5380_write(MODE_REG, MR_BASE); - /* + /* * Reselect interrupts must be turned off prior to the dropping of BSY, * otherwise we will trigger an interrupt. */ NCR5380_write(SELECT_ENABLE_REG, 0); + spin_unlock_irq(&hostdata->lock); + /* - * The initiator shall then wait at least two deskew delays and release + * The initiator shall then wait at least two deskew delays and release * the BSY signal. */ - udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */ + udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */ /* Reset BSY */ - NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL)); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | + ICR_ASSERT_ATN | ICR_ASSERT_SEL); - /* + /* * Something weird happens when we cease to drive BSY - looks - * like the board/chip is letting us do another read before the + * like the board/chip is letting us do another read before the * appropriate propagation delay has expired, and we're confusing * a BSY signal from ourselves as the target's response to SELECTION. * * A small delay (the 'C++' frontend breaks the pipeline with an * unnecessary jump, making it work on my 386-33/Trantor T128, the - * tighter 'C' code breaks and requires this) solves the problem - - * the 1 us delay is arbitrary, and only used because this delay will - * be the same on other platforms and since it works here, it should + * tighter 'C' code breaks and requires this) solves the problem - + * the 1 us delay is arbitrary, and only used because this delay will + * be the same on other platforms and since it works here, it should * work there. * * wingel suggests that this could be due to failing to wait @@ -1339,50 +1162,43 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) udelay(1); - dprintk(NDEBUG_SELECTION, "scsi%d : selecting target %d\n", instance->host_no, scmd_id(cmd)); + dsprintk(NDEBUG_SELECTION, instance, "selecting target %d\n", scmd_id(cmd)); - /* - * The SCSI specification calls for a 250 ms timeout for the actual + /* + * The SCSI specification calls for a 250 ms timeout for the actual * selection. */ - timeout = jiffies + msecs_to_jiffies(250); - - /* - * XXX very interesting - we're seeing a bounce where the BSY we - * asserted is being reflected / still asserted (propagation delay?) - * and it's detecting as true. Sigh. - */ - - hostdata->select_time = 0; /* we count the clock ticks at which we polled */ - hostdata->selecting = cmd; + err = NCR5380_poll_politely(instance, STATUS_REG, SR_BSY, SR_BSY, + msecs_to_jiffies(250)); -part2: - /* RvC: here we enter after a sleeping period, or immediately after - execution of part 1 - we poll only once ech clock tick */ - value = NCR5380_read(STATUS_REG) & (SR_BSY | SR_IO); - - if (!value && (hostdata->select_time < HZ/4)) { - /* RvC: we still must wait for a device response */ - hostdata->select_time++; /* after 25 ticks the device has failed */ - NCR5380_set_timer(hostdata, 1); - return 0; /* RvC: we return here with hostdata->selecting set, - to go to sleep */ - } - - hostdata->selecting = NULL;/* clear this pointer, because we passed the - waiting period */ if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) { + spin_lock_irq(&hostdata->lock); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); NCR5380_reselect(instance); - printk("scsi%d : reselection after won arbitration?\n", instance->host_no); + if (!hostdata->connected) + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); + shost_printk(KERN_ERR, instance, "reselection after won arbitration?\n"); + goto out; + } + + if (err < 0) { + spin_lock_irq(&hostdata->lock); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - return -1; + /* Can't touch cmd if it has been reclaimed by the scsi ML */ + if (hostdata->selecting) { + cmd->result = DID_BAD_TARGET << 16; + complete_cmd(instance, cmd); + dsprintk(NDEBUG_SELECTION, instance, "target did not respond within 250ms\n"); + cmd = NULL; + } + goto out; } - /* - * No less than two deskew delays after the initiator detects the - * BSY signal is true, it shall release the SEL signal and may + + /* + * No less than two deskew delays after the initiator detects the + * BSY signal is true, it shall release the SEL signal and may * change the DATA BUS. -wingel */ @@ -1390,53 +1206,38 @@ part2: NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); - if (!(NCR5380_read(STATUS_REG) & SR_BSY)) { - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - if (hostdata->targets_present & (1 << scmd_id(cmd))) { - printk(KERN_DEBUG "scsi%d : weirdness\n", instance->host_no); - if (hostdata->restart_select) - printk(KERN_DEBUG "\trestart select\n"); - NCR5380_dprint(NDEBUG_SELECTION, instance); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - return -1; - } - cmd->result = DID_BAD_TARGET << 16; - cmd->scsi_done(cmd); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - dprintk(NDEBUG_SELECTION, "scsi%d : target did not respond within 250ms\n", instance->host_no); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - return 0; - } - hostdata->targets_present |= (1 << scmd_id(cmd)); - /* - * Since we followed the SCSI spec, and raised ATN while SEL + * Since we followed the SCSI spec, and raised ATN while SEL * was true but before BSY was false during selection, the information * transfer phase should be a MESSAGE OUT phase so that we can send the * IDENTIFY message. - * + * * If SCSI-II tagged queuing is enabled, we also send a SIMPLE_QUEUE_TAG * message (2 bytes) with a tag ID that we increment with every command * until it wraps back to 0. * * XXX - it turns out that there are some broken SCSI-II devices, - * which claim to support tagged queuing but fail when more than - * some number of commands are issued at once. + * which claim to support tagged queuing but fail when more than + * some number of commands are issued at once. */ /* Wait for start of REQ/ACK handshake */ - spin_unlock_irq(instance->host_lock); err = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ); - spin_lock_irq(instance->host_lock); - - if(err) { - printk(KERN_ERR "scsi%d: timeout at NCR5380.c:%d\n", instance->host_no, __LINE__); + spin_lock_irq(&hostdata->lock); + if (err < 0) { + shost_printk(KERN_ERR, instance, "select: REQ timeout\n"); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - goto failed; + goto out; + } + if (!hostdata->selecting) { + do_abort(instance); + goto out; } - dprintk(NDEBUG_SELECTION, "scsi%d : target %d selected, going into MESSAGE OUT phase.\n", instance->host_no, cmd->device->id); + dsprintk(NDEBUG_SELECTION, instance, "target %d selected, going into MESSAGE OUT phase.\n", + scmd_id(cmd)); tmp[0] = IDENTIFY(((instance->irq == NO_IRQ) ? 0 : 1), cmd->device->lun); len = 1; @@ -1446,104 +1247,82 @@ part2: data = tmp; phase = PHASE_MSGOUT; NCR5380_transfer_pio(instance, &phase, &len, &data); - dprintk(NDEBUG_SELECTION, "scsi%d : nexus established.\n", instance->host_no); + dsprintk(NDEBUG_SELECTION, instance, "nexus established.\n"); /* XXX need to handle errors here */ + hostdata->connected = cmd; - hostdata->busy[cmd->device->id] |= (1 << (cmd->device->lun & 0xFF)); + hostdata->busy[cmd->device->id] |= 1 << cmd->device->lun; initialize_SCp(cmd); - return 0; - - /* Selection failed */ -failed: - return -1; + cmd = NULL; +out: + if (!hostdata->selecting) + return NULL; + hostdata->selecting = NULL; + return cmd; } -/* - * Function : int NCR5380_transfer_pio (struct Scsi_Host *instance, - * unsigned char *phase, int *count, unsigned char **data) +/* + * Function : int NCR5380_transfer_pio (struct Scsi_Host *instance, + * unsigned char *phase, int *count, unsigned char **data) * * Purpose : transfers data in given phase using polled I/O * - * Inputs : instance - instance of driver, *phase - pointer to - * what phase is expected, *count - pointer to number of - * bytes to transfer, **data - pointer to data pointer. - * + * Inputs : instance - instance of driver, *phase - pointer to + * what phase is expected, *count - pointer to number of + * bytes to transfer, **data - pointer to data pointer. + * * Returns : -1 when different phase is entered without transferring - * maximum number of bytes, 0 if all bytes or transferred or exit - * is in same phase. + * maximum number of bytes, 0 if all bytes are transferred or exit + * is in same phase. * - * Also, *phase, *count, *data are modified in place. + * Also, *phase, *count, *data are modified in place. * * XXX Note : handling for bus free may be useful. */ /* - * Note : this code is not as quick as it could be, however it + * Note : this code is not as quick as it could be, however it * IS 100% reliable, and for the actual data transfer where speed * counts, we will always do a pseudo DMA or DMA transfer. */ -static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) { - NCR5380_local_declare(); +static int NCR5380_transfer_pio(struct Scsi_Host *instance, + unsigned char *phase, int *count, + unsigned char **data) +{ unsigned char p = *phase, tmp; int c = *count; unsigned char *d = *data; - /* - * RvC: some administrative data to process polling time - */ - int break_allowed = 0; - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; - NCR5380_setup(instance); - - if (!(p & SR_IO)) - dprintk(NDEBUG_PIO, "scsi%d : pio write %d bytes\n", instance->host_no, c); - else - dprintk(NDEBUG_PIO, "scsi%d : pio read %d bytes\n", instance->host_no, c); - /* - * The NCR5380 chip will only drive the SCSI bus when the + /* + * The NCR5380 chip will only drive the SCSI bus when the * phase specified in the appropriate bits of the TARGET COMMAND * REGISTER match the STATUS REGISTER */ - NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p)); + NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p)); - /* RvC: don't know if this is necessary, but other SCSI I/O is short - * so breaks are not necessary there - */ - if ((p == PHASE_DATAIN) || (p == PHASE_DATAOUT)) { - break_allowed = 1; - } do { - /* - * Wait for assertion of REQ, after which the phase bits will be - * valid - */ - - /* RvC: we simply poll once, after that we stop temporarily - * and let the device buffer fill up - * if breaking is not allowed, we keep polling as long as needed + /* + * Wait for assertion of REQ, after which the phase bits will be + * valid */ - /* FIXME */ - while (!((tmp = NCR5380_read(STATUS_REG)) & SR_REQ) && !break_allowed); - if (!(tmp & SR_REQ)) { - /* timeout condition */ - NCR5380_set_timer(hostdata, USLEEP_SLEEP); + if (NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ) < 0) break; - } - dprintk(NDEBUG_HANDSHAKE, "scsi%d : REQ detected\n", instance->host_no); + dsprintk(NDEBUG_HANDSHAKE, instance, "REQ asserted\n"); /* Check for phase mismatch */ - if ((tmp & PHASE_MASK) != p) { - dprintk(NDEBUG_HANDSHAKE, "scsi%d : phase mismatch\n", instance->host_no); - NCR5380_dprint_phase(NDEBUG_HANDSHAKE, instance); + if ((NCR5380_read(STATUS_REG) & PHASE_MASK) != p) { + dsprintk(NDEBUG_PIO, instance, "phase mismatch\n"); + NCR5380_dprint_phase(NDEBUG_PIO, instance); break; } + /* Do actual transfer from SCSI bus to / from memory */ if (!(p & SR_IO)) NCR5380_write(OUTPUT_DATA_REG, *d); @@ -1552,7 +1331,7 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase ++d; - /* + /* * The SCSI standard suggests that in MSGOUT phase, the initiator * should drop ATN on the last byte of the message phase * after REQ has been asserted for the handshake but before @@ -1563,29 +1342,34 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase if (!((p & SR_MSG) && c > 1)) { NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA); NCR5380_dprint(NDEBUG_PIO, instance); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ACK); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | + ICR_ASSERT_DATA | ICR_ASSERT_ACK); } else { - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | + ICR_ASSERT_DATA | ICR_ASSERT_ATN); NCR5380_dprint(NDEBUG_PIO, instance); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_ACK); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | + ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_ACK); } } else { NCR5380_dprint(NDEBUG_PIO, instance); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ACK); } - /* FIXME - if this fails bus reset ?? */ - NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 5*HZ); - dprintk(NDEBUG_HANDSHAKE, "scsi%d : req false, handshake complete\n", instance->host_no); + if (NCR5380_poll_politely(instance, + STATUS_REG, SR_REQ, 0, 5 * HZ) < 0) + break; + + dsprintk(NDEBUG_HANDSHAKE, instance, "REQ negated, handshake complete\n"); /* - * We have several special cases to consider during REQ/ACK handshaking : - * 1. We were in MSGOUT phase, and we are on the last byte of the - * message. ATN must be dropped as ACK is dropped. + * We have several special cases to consider during REQ/ACK handshaking : + * 1. We were in MSGOUT phase, and we are on the last byte of the + * message. ATN must be dropped as ACK is dropped. * - * 2. We are in a MSGIN phase, and we are on the last byte of the - * message. We must exit with ACK asserted, so that the calling - * code may raise ATN before dropping ACK to reject the message. + * 2. We are in a MSGIN phase, and we are on the last byte of the + * message. We must exit with ACK asserted, so that the calling + * code may raise ATN before dropping ACK to reject the message. * * 3. ACK and ATN are clear and the target may proceed as normal. */ @@ -1597,12 +1381,16 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase } } while (--c); - dprintk(NDEBUG_PIO, "scsi%d : residual %d\n", instance->host_no, c); + dsprintk(NDEBUG_PIO, instance, "residual %d\n", c); *count = c; *data = d; tmp = NCR5380_read(STATUS_REG); - if (tmp & SR_REQ) + /* The phase read from the bus is valid if either REQ is (already) + * asserted or if ACK hasn't been released yet. The latter applies if + * we're in MSG IN, DATA IN or STATUS and all bytes have been received. + */ + if ((tmp & SR_REQ) || ((tmp & SR_IO) && c == 0)) *phase = tmp & PHASE_MASK; else *phase = PHASE_UNKNOWN; @@ -1614,79 +1402,80 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase } /** - * do_reset - issue a reset command - * @host: adapter to reset + * do_reset - issue a reset command + * @instance: adapter to reset * - * Issue a reset sequence to the NCR5380 and try and get the bus - * back into sane shape. + * Issue a reset sequence to the NCR5380 and try and get the bus + * back into sane shape. * - * Locks: caller holds queue lock + * This clears the reset interrupt flag because there may be no handler for + * it. When the driver is initialized, the NCR5380_intr() handler has not yet + * been installed. And when in EH we may have released the ST DMA interrupt. */ - -static void do_reset(struct Scsi_Host *host) { - NCR5380_local_declare(); - NCR5380_setup(host); - NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK)); +static void do_reset(struct Scsi_Host *instance) +{ + unsigned long flags; + + local_irq_save(flags); + NCR5380_write(TARGET_COMMAND_REG, + PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK)); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST); - udelay(25); + udelay(50); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); + local_irq_restore(flags); } -/* - * Function : do_abort (Scsi_Host *host) - * - * Purpose : abort the currently established nexus. Should only be - * called from a routine which can drop into a - * - * Returns : 0 on success, -1 on failure. - * - * Locks: queue lock held by caller - * FIXME: sort this out and get new_eh running +/** + * do_abort - abort the currently established nexus by going to + * MESSAGE OUT phase and sending an ABORT message. + * @instance: relevant scsi host instance + * + * Returns 0 on success, -1 on failure. */ -static int do_abort(struct Scsi_Host *host) { - NCR5380_local_declare(); +static int do_abort(struct Scsi_Host *instance) +{ unsigned char *msgptr, phase, tmp; int len; int rc; - NCR5380_setup(host); - /* Request message out phase */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); - /* - * Wait for the target to indicate a valid phase by asserting - * REQ. Once this happens, we'll have either a MSGOUT phase - * and can immediately send the ABORT message, or we'll have some + /* + * Wait for the target to indicate a valid phase by asserting + * REQ. Once this happens, we'll have either a MSGOUT phase + * and can immediately send the ABORT message, or we'll have some * other phase and will have to source/sink data. - * + * * We really don't care what value was on the bus or what value * the target sees, so we just handshake. */ - rc = NCR5380_poll_politely(host, STATUS_REG, SR_REQ, SR_REQ, 60 * HZ); - - if(rc < 0) - return -1; + rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 10 * HZ); + if (rc < 0) + goto timeout; + + tmp = NCR5380_read(STATUS_REG) & PHASE_MASK; - tmp = (unsigned char)rc; - NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp)); - if ((tmp & PHASE_MASK) != PHASE_MSGOUT) { - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK); - rc = NCR5380_poll_politely(host, STATUS_REG, SR_REQ, 0, 3*HZ); + if (tmp != PHASE_MSGOUT) { + NCR5380_write(INITIATOR_COMMAND_REG, + ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK); + rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 3 * HZ); + if (rc < 0) + goto timeout; NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); - if(rc == -1) - return -1; } + tmp = ABORT; msgptr = &tmp; len = 1; phase = PHASE_MSGOUT; - NCR5380_transfer_pio(host, &phase, &len, &msgptr); + NCR5380_transfer_pio(instance, &phase, &len, &msgptr); /* * If we got here, and the command completed successfully, @@ -1694,32 +1483,37 @@ static int do_abort(struct Scsi_Host *host) { */ return len ? -1 : 0; + +timeout: + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + return -1; } #if defined(REAL_DMA) || defined(PSEUDO_DMA) || defined (REAL_DMA_POLL) -/* - * Function : int NCR5380_transfer_dma (struct Scsi_Host *instance, - * unsigned char *phase, int *count, unsigned char **data) +/* + * Function : int NCR5380_transfer_dma (struct Scsi_Host *instance, + * unsigned char *phase, int *count, unsigned char **data) * * Purpose : transfers data in given phase using either real - * or pseudo DMA. + * or pseudo DMA. * - * Inputs : instance - instance of driver, *phase - pointer to - * what phase is expected, *count - pointer to number of - * bytes to transfer, **data - pointer to data pointer. - * - * Returns : -1 when different phase is entered without transferring - * maximum number of bytes, 0 if all bytes or transferred or exit - * is in same phase. + * Inputs : instance - instance of driver, *phase - pointer to + * what phase is expected, *count - pointer to number of + * bytes to transfer, **data - pointer to data pointer. * - * Also, *phase, *count, *data are modified in place. + * Returns : -1 when different phase is entered without transferring + * maximum number of bytes, 0 if all bytes or transferred or exit + * is in same phase. * - * Locks: io_request lock held by caller + * Also, *phase, *count, *data are modified in place. */ -static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) { - NCR5380_local_declare(); +static int NCR5380_transfer_dma(struct Scsi_Host *instance, + unsigned char *phase, int *count, + unsigned char **data) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); register int c = *count; register unsigned char p = *phase; register unsigned char *d = *data; @@ -1730,54 +1524,47 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase unsigned char saved_data = 0, overrun = 0, residue; #endif - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; - - NCR5380_setup(instance); - if ((tmp = (NCR5380_read(STATUS_REG) & PHASE_MASK)) != p) { *phase = tmp; return -1; } #if defined(REAL_DMA) || defined(REAL_DMA_POLL) -#ifdef READ_OVERRUNS if (p & SR_IO) { - c -= 2; + if (!(hostdata->flags & FLAG_NO_DMA_FIXUPS)) + c -= 2; } -#endif - dprintk(NDEBUG_DMA, "scsi%d : initializing DMA channel %d for %s, %d bytes %s %0x\n", instance->host_no, instance->dma_channel, (p & SR_IO) ? "reading" : "writing", c, (p & SR_IO) ? "to" : "from", (unsigned) d); hostdata->dma_len = (p & SR_IO) ? NCR5380_dma_read_setup(instance, d, c) : NCR5380_dma_write_setup(instance, d, c); + + dsprintk(NDEBUG_DMA, instance, "initializing DMA %s: length %d, address %p\n", + (p & SR_IO) ? "receive" : "send", c, *data); #endif NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p)); #ifdef REAL_DMA - NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_EOP_INTR | MR_MONITOR_BSY); + NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY | + MR_ENABLE_EOP_INTR); #elif defined(REAL_DMA_POLL) - NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE); + NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY); #else /* * Note : on my sample board, watch-dog timeouts occurred when interrupts - * were not disabled for the duration of a single DMA transfer, from + * were not disabled for the duration of a single DMA transfer, from * before the setting of DMA mode to after transfer of the last byte. */ -#if defined(PSEUDO_DMA) && defined(UNSAFE) - spin_unlock_irq(instance->host_lock); -#endif - /* KLL May need eop and parity in 53c400 */ - if (hostdata->flags & FLAG_NCR53C400) - NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | - MR_ENABLE_PAR_CHECK | MR_ENABLE_PAR_INTR | - MR_ENABLE_EOP_INTR | MR_MONITOR_BSY); + if (hostdata->flags & FLAG_NO_DMA_FIXUP) + NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY | + MR_ENABLE_EOP_INTR); else - NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE); + NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY); #endif /* def REAL_DMA */ dprintk(NDEBUG_DMA, "scsi%d : mode reg = 0x%X\n", instance->host_no, NCR5380_read(MODE_REG)); - /* - * On the PAS16 at least I/O recovery delays are not needed here. - * Everyone else seems to want them. + /* + * On the PAS16 at least I/O recovery delays are not needed here. + * Everyone else seems to want them. */ if (p & SR_IO) { @@ -1797,49 +1584,49 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase } while ((tmp & BASR_PHASE_MATCH) && !(tmp & (BASR_BUSY_ERROR | BASR_END_DMA_TRANSFER))); /* - At this point, either we've completed DMA, or we have a phase mismatch, - or we've unexpectedly lost BUSY (which is a real error). - - For write DMAs, we want to wait until the last byte has been - transferred out over the bus before we turn off DMA mode. Alas, there - seems to be no terribly good way of doing this on a 5380 under all - conditions. For non-scatter-gather operations, we can wait until REQ - and ACK both go false, or until a phase mismatch occurs. Gather-writes - are nastier, since the device will be expecting more data than we - are prepared to send it, and REQ will remain asserted. On a 53C8[01] we - could test LAST BIT SENT to assure transfer (I imagine this is precisely - why this signal was added to the newer chips) but on the older 538[01] - this signal does not exist. The workaround for this lack is a watchdog; - we bail out of the wait-loop after a modest amount of wait-time if - the usual exit conditions are not met. Not a terribly clean or - correct solution :-% - - Reads are equally tricky due to a nasty characteristic of the NCR5380. - If the chip is in DMA mode for an READ, it will respond to a target's - REQ by latching the SCSI data into the INPUT DATA register and asserting - ACK, even if it has _already_ been notified by the DMA controller that - the current DMA transfer has completed! If the NCR5380 is then taken - out of DMA mode, this already-acknowledged byte is lost. - - This is not a problem for "one DMA transfer per command" reads, because - the situation will never arise... either all of the data is DMA'ed - properly, or the target switches to MESSAGE IN phase to signal a - disconnection (either operation bringing the DMA to a clean halt). - However, in order to handle scatter-reads, we must work around the - problem. The chosen fix is to DMA N-2 bytes, then check for the - condition before taking the NCR5380 out of DMA mode. One or two extra - bytes are transferred via PIO as necessary to fill out the original - request. + * At this point, either we've completed DMA, or we have a phase mismatch, + * or we've unexpectedly lost BUSY (which is a real error). + * + * For DMA sends, we want to wait until the last byte has been + * transferred out over the bus before we turn off DMA mode. Alas, there + * seems to be no terribly good way of doing this on a 5380 under all + * conditions. For non-scatter-gather operations, we can wait until REQ + * and ACK both go false, or until a phase mismatch occurs. Gather-sends + * are nastier, since the device will be expecting more data than we + * are prepared to send it, and REQ will remain asserted. On a 53C8[01] we + * could test Last Byte Sent to assure transfer (I imagine this is precisely + * why this signal was added to the newer chips) but on the older 538[01] + * this signal does not exist. The workaround for this lack is a watchdog; + * we bail out of the wait-loop after a modest amount of wait-time if + * the usual exit conditions are not met. Not a terribly clean or + * correct solution :-% + * + * DMA receive is equally tricky due to a nasty characteristic of the NCR5380. + * If the chip is in DMA receive mode, it will respond to a target's + * REQ by latching the SCSI data into the INPUT DATA register and asserting + * ACK, even if it has _already_ been notified by the DMA controller that + * the current DMA transfer has completed! If the NCR5380 is then taken + * out of DMA mode, this already-acknowledged byte is lost. This is + * not a problem for "one DMA transfer per READ command", because + * the situation will never arise... either all of the data is DMA'ed + * properly, or the target switches to MESSAGE IN phase to signal a + * disconnection (either operation bringing the DMA to a clean halt). + * However, in order to handle scatter-receive, we must work around the + * problem. The chosen fix is to DMA N-2 bytes, then check for the + * condition before taking the NCR5380 out of DMA mode. One or two extra + * bytes are transferred via PIO as necessary to fill out the original + * request. */ if (p & SR_IO) { -#ifdef READ_OVERRUNS - udelay(10); - if (((NCR5380_read(BUS_AND_STATUS_REG) & (BASR_PHASE_MATCH | BASR_ACK)) == (BASR_PHASE_MATCH | BASR_ACK))) { - saved_data = NCR5380_read(INPUT_DATA_REGISTER); - overrun = 1; + if (!(hostdata->flags & FLAG_NO_DMA_FIXUPS)) { + udelay(10); + if ((NCR5380_read(BUS_AND_STATUS_REG) & (BASR_PHASE_MATCH | BASR_ACK)) == + (BASR_PHASE_MATCH | BASR_ACK)) { + saved_data = NCR5380_read(INPUT_DATA_REGISTER); + overrun = 1; + } } -#endif } else { int limit = 100; while (((tmp = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_ACK) || (NCR5380_read(STATUS_REG) & SR_REQ)) { @@ -1850,7 +1637,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase } } - dprintk(NDEBUG_DMA, "scsi%d : polled DMA transfer complete, basr 0x%X, sr 0x%X\n", instance->host_no, tmp, NCR5380_read(STATUS_REG)); + dsprintk(NDEBUG_DMA, "polled DMA transfer complete, basr 0x%02x, sr 0x%02x\n", + tmp, NCR5380_read(STATUS_REG)); NCR5380_write(MODE_REG, MR_BASE); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); @@ -1861,8 +1649,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase *data += c; *phase = NCR5380_read(STATUS_REG) & PHASE_MASK; -#ifdef READ_OVERRUNS - if (*phase == p && (p & SR_IO) && residue == 0) { + if (!(hostdata->flags & FLAG_NO_DMA_FIXUPS) && + *phase == p && (p & SR_IO) && residue == 0) { if (overrun) { dprintk(NDEBUG_DMA, "Got an input overrun, using saved byte\n"); **data = saved_data; @@ -1877,7 +1665,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase NCR5380_transfer_pio(instance, phase, &cnt, data); *count -= toPIO - cnt; } -#endif dprintk(NDEBUG_DMA, "Return with data ptr = 0x%X, count %d, last 0x%X, next 0x%X\n", *data, *count, *(*data + *count - 1), *(*data + *count)); return 0; @@ -1886,95 +1673,64 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase return 0; #else /* defined(REAL_DMA_POLL) */ if (p & SR_IO) { -#ifdef DMA_WORKS_RIGHT - foo = NCR5380_pread(instance, d, c); -#else - int diff = 1; - if (hostdata->flags & FLAG_NCR53C400) { - diff = 0; - } - if (!(foo = NCR5380_pread(instance, d, c - diff))) { + foo = NCR5380_pread(instance, d, + hostdata->flags & FLAG_NO_DMA_FIXUP ? c : c - 1); + if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) { /* - * We can't disable DMA mode after successfully transferring + * We can't disable DMA mode after successfully transferring * what we plan to be the last byte, since that would open up - * a race condition where if the target asserted REQ before + * a race condition where if the target asserted REQ before * we got the DMA mode reset, the NCR5380 would have latched * an additional byte into the INPUT DATA register and we'd * have dropped it. - * - * The workaround was to transfer one fewer bytes than we - * intended to with the pseudo-DMA read function, wait for + * + * The workaround was to transfer one fewer bytes than we + * intended to with the pseudo-DMA read function, wait for * the chip to latch the last byte, read it, and then disable * pseudo-DMA mode. - * + * * After REQ is asserted, the NCR5380 asserts DRQ and ACK. * REQ is deasserted when ACK is asserted, and not reasserted * until ACK goes false. Since the NCR5380 won't lower ACK * until DACK is asserted, which won't happen unless we twiddle - * the DMA port or we take the NCR5380 out of DMA mode, we - * can guarantee that we won't handshake another extra + * the DMA port or we take the NCR5380 out of DMA mode, we + * can guarantee that we won't handshake another extra * byte. */ - if (!(hostdata->flags & FLAG_NCR53C400)) { - while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)); - /* Wait for clean handshake */ - while (NCR5380_read(STATUS_REG) & SR_REQ); - d[c - 1] = NCR5380_read(INPUT_DATA_REG); + if (NCR5380_poll_politely(instance, BUS_AND_STATUS_REG, + BASR_DRQ, BASR_DRQ, HZ) < 0) { + foo = -1; + shost_printk(KERN_ERR, instance, "PDMA read: DRQ timeout\n"); + } + if (NCR5380_poll_politely(instance, STATUS_REG, + SR_REQ, 0, HZ) < 0) { + foo = -1; + shost_printk(KERN_ERR, instance, "PDMA read: !REQ timeout\n"); } + d[c - 1] = NCR5380_read(INPUT_DATA_REG); } -#endif } else { -#ifdef DMA_WORKS_RIGHT foo = NCR5380_pwrite(instance, d, c); -#else - int timeout; - dprintk(NDEBUG_C400_PWRITE, "About to pwrite %d bytes\n", c); - if (!(foo = NCR5380_pwrite(instance, d, c))) { + if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) { /* - * Wait for the last byte to be sent. If REQ is being asserted for - * the byte we're interested, we'll ACK it and it will go false. + * Wait for the last byte to be sent. If REQ is being asserted for + * the byte we're interested, we'll ACK it and it will go false. */ - if (!(hostdata->flags & FLAG_HAS_LAST_BYTE_SENT)) { - timeout = 20000; - while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) && (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)); - - if (!timeout) - dprintk(NDEBUG_LAST_BYTE_SENT, "scsi%d : timed out on last byte\n", instance->host_no); - - if (hostdata->flags & FLAG_CHECK_LAST_BYTE_SENT) { - hostdata->flags &= ~FLAG_CHECK_LAST_BYTE_SENT; - if (NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT) { - hostdata->flags |= FLAG_HAS_LAST_BYTE_SENT; - dprintk(NDEBUG_LAST_BYTE_SENT, "scsi%d : last byte sent works\n", instance->host_no); - } - } - } else { - dprintk(NDEBUG_C400_PWRITE, "Waiting for LASTBYTE\n"); - while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT)); - dprintk(NDEBUG_C400_PWRITE, "Got LASTBYTE\n"); + if (NCR5380_poll_politely2(instance, + BUS_AND_STATUS_REG, BASR_DRQ, BASR_DRQ, + BUS_AND_STATUS_REG, BASR_PHASE_MATCH, 0, HZ) < 0) { + foo = -1; + shost_printk(KERN_ERR, instance, "PDMA write: DRQ and phase timeout\n"); } } -#endif } NCR5380_write(MODE_REG, MR_BASE); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - - if ((!(p & SR_IO)) && (hostdata->flags & FLAG_NCR53C400)) { - dprintk(NDEBUG_C400_PWRITE, "53C400w: Checking for IRQ\n"); - if (NCR5380_read(BUS_AND_STATUS_REG) & BASR_IRQ) { - dprintk(NDEBUG_C400_PWRITE, "53C400w: got it, reading reset interrupt reg\n"); - NCR5380_read(RESET_PARITY_INTERRUPT_REG); - } else { - printk("53C400w: IRQ NOT THERE!\n"); - } - } + NCR5380_read(RESET_PARITY_INTERRUPT_REG); *data = d + c; *count = 0; *phase = NCR5380_read(STATUS_REG) & PHASE_MASK; -#if defined(PSEUDO_DMA) && defined(UNSAFE) - spin_lock_irq(instance->host_lock); -#endif /* defined(REAL_DMA_POLL) */ return foo; #endif /* def REAL_DMA */ } @@ -1983,25 +1739,23 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase /* * Function : NCR5380_information_transfer (struct Scsi_Host *instance) * - * Purpose : run through the various SCSI phases and do as the target - * directs us to. Operates on the currently connected command, - * instance->connected. + * Purpose : run through the various SCSI phases and do as the target + * directs us to. Operates on the currently connected command, + * instance->connected. * * Inputs : instance, instance for which we are doing commands * - * Side effects : SCSI things happen, the disconnected queue will be - * modified if a command disconnects, *instance->connected will - * change. - * - * XXX Note : we need to watch for bus free or a reset condition here - * to recover from an unexpected bus free condition. + * Side effects : SCSI things happen, the disconnected queue will be + * modified if a command disconnects, *instance->connected will + * change. * - * Locks: io_request_lock held by caller in IRQ mode + * XXX Note : we need to watch for bus free or a reset condition here + * to recover from an unexpected bus free condition. */ -static void NCR5380_information_transfer(struct Scsi_Host *instance) { - NCR5380_local_declare(); - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *)instance->hostdata; +static void NCR5380_information_transfer(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); unsigned char msgout = NOP; int sink = 0; int len; @@ -2010,13 +1764,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { #endif unsigned char *data; unsigned char phase, tmp, extended_msg[10], old_phase = 0xff; - struct scsi_cmnd *cmd = (struct scsi_cmnd *) hostdata->connected; - /* RvC: we need to set the end of the polling time */ - unsigned long poll_time = jiffies + USLEEP_POLL; + struct scsi_cmnd *cmd; - NCR5380_setup(instance); + while ((cmd = hostdata->connected)) { + struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); - while (1) { tmp = NCR5380_read(STATUS_REG); /* We only have a valid SCSI phase when REQ is asserted */ if (tmp & SR_REQ) { @@ -2028,24 +1780,28 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { if (sink && (phase != PHASE_MSGOUT)) { NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp)); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK); - while (NCR5380_read(STATUS_REG) & SR_REQ); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | + ICR_ASSERT_ACK); + while (NCR5380_read(STATUS_REG) & SR_REQ) + ; + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | + ICR_ASSERT_ATN); sink = 0; continue; } + switch (phase) { - case PHASE_DATAIN: case PHASE_DATAOUT: #if (NDEBUG & NDEBUG_NO_DATAOUT) - printk("scsi%d : NDEBUG_NO_DATAOUT set, attempted DATAOUT aborted\n", instance->host_no); + shost_printk(KERN_DEBUG, instance, "NDEBUG_NO_DATAOUT set, attempted DATAOUT aborted\n"); sink = 1; do_abort(instance); cmd->result = DID_ERROR << 16; - cmd->scsi_done(cmd); + complete_cmd(instance, cmd); return; #endif - /* + case PHASE_DATAIN: + /* * If there is no room left in the current buffer in the * scatter-gather list, move onto the next one. */ @@ -2055,10 +1811,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { --cmd->SCp.buffers_residual; cmd->SCp.this_residual = cmd->SCp.buffer->length; cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); - dprintk(NDEBUG_INFORMATION, "scsi%d : %d bytes and %d buffers left\n", instance->host_no, cmd->SCp.this_residual, cmd->SCp.buffers_residual); + dsprintk(NDEBUG_INFORMATION, instance, "%d bytes and %d buffers left\n", + cmd->SCp.this_residual, + cmd->SCp.buffers_residual); } + /* - * The preferred transfer method is going to be + * The preferred transfer method is going to be * PSEUDO-DMA for systems that are strictly PIO, * since we can let the hardware do the handshaking. * @@ -2068,50 +1827,39 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { */ #if defined(PSEUDO_DMA) || defined(REAL_DMA_POLL) - /* KLL - * PSEUDO_DMA is defined here. If this is the g_NCR5380 - * driver then it will always be defined, so the - * FLAG_NO_PSEUDO_DMA is used to inhibit PDMA in the base - * NCR5380 case. I think this is a fairly clean solution. - * We supplement these 2 if's with the flag. - */ -#ifdef NCR5380_dma_xfer_len - if (!cmd->device->borken && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && (transfersize = NCR5380_dma_xfer_len(instance, cmd)) != 0) { -#else - transfersize = cmd->transfersize; - -#ifdef LIMIT_TRANSFERSIZE /* If we have problems with interrupt service */ - if (transfersize > 512) - transfersize = 512; -#endif /* LIMIT_TRANSFERSIZE */ - - if (!cmd->device->borken && transfersize && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && cmd->SCp.this_residual && !(cmd->SCp.this_residual % transfersize)) { - /* Limit transfers to 32K, for xx400 & xx406 - * pseudoDMA that transfers in 128 bytes blocks. */ - if (transfersize > 32 * 1024) - transfersize = 32 * 1024; -#endif + transfersize = 0; + if (!cmd->device->borken && + !(hostdata->flags & FLAG_NO_PSEUDO_DMA)) + transfersize = NCR5380_dma_xfer_len(instance, cmd, phase); + + if (transfersize) { len = transfersize; - if (NCR5380_transfer_dma(instance, &phase, &len, (unsigned char **) &cmd->SCp.ptr)) { + if (NCR5380_transfer_dma(instance, &phase, + &len, (unsigned char **)&cmd->SCp.ptr)) { /* - * If the watchdog timer fires, all future accesses to this - * device will use the polled-IO. + * If the watchdog timer fires, all future + * accesses to this device will use the + * polled-IO. */ scmd_printk(KERN_INFO, cmd, - "switching to slow handshake\n"); + "switching to slow handshake\n"); cmd->device->borken = 1; - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); sink = 1; do_abort(instance); cmd->result = DID_ERROR << 16; - cmd->scsi_done(cmd); + complete_cmd(instance, cmd); /* XXX - need to source or sink data here, as appropriate */ } else cmd->SCp.this_residual -= transfersize - len; } else #endif /* defined(PSEUDO_DMA) || defined(REAL_DMA_POLL) */ - NCR5380_transfer_pio(instance, &phase, (int *) &cmd->SCp.this_residual, (unsigned char **) - &cmd->SCp.ptr); + { + spin_unlock_irq(&hostdata->lock); + NCR5380_transfer_pio(instance, &phase, + (int *)&cmd->SCp.this_residual, + (unsigned char **)&cmd->SCp.ptr); + spin_lock_irq(&hostdata->lock); + } break; case PHASE_MSGIN: len = 1; @@ -2120,101 +1868,42 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { cmd->SCp.Message = tmp; switch (tmp) { - /* - * Linking lets us reduce the time required to get the - * next command out to the device, hopefully this will - * mean we don't waste another revolution due to the delays - * required by ARBITRATION and another SELECTION. - * - * In the current implementation proposal, low level drivers - * merely have to start the next command, pointed to by - * next_link, done() is called as with unlinked commands. - */ -#ifdef LINKED - case LINKED_CMD_COMPLETE: - case LINKED_FLG_CMD_COMPLETE: - /* Accept message by clearing ACK */ - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - dprintk(NDEBUG_LINKED, "scsi%d : target %d lun %llu linked command complete.\n", instance->host_no, cmd->device->id, cmd->device->lun); - /* - * Sanity check : A linked command should only terminate with - * one of these messages if there are more linked commands - * available. - */ - if (!cmd->next_link) { - printk("scsi%d : target %d lun %llu linked command complete, no next_link\n" instance->host_no, cmd->device->id, cmd->device->lun); - sink = 1; - do_abort(instance); - return; - } - initialize_SCp(cmd->next_link); - /* The next command is still part of this process */ - cmd->next_link->tag = cmd->tag; - cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); - dprintk(NDEBUG_LINKED, "scsi%d : target %d lun %llu linked request done, calling scsi_done().\n", instance->host_no, cmd->device->id, cmd->device->lun); - cmd->scsi_done(cmd); - cmd = hostdata->connected; - break; -#endif /* def LINKED */ case ABORT: case COMMAND_COMPLETE: /* Accept message by clearing ACK */ sink = 1; NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - hostdata->connected = NULL; - dprintk(NDEBUG_QUEUES, "scsi%d : command for target %d, lun %llu completed\n", instance->host_no, cmd->device->id, cmd->device->lun); - hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xFF)); - - /* - * I'm not sure what the correct thing to do here is : - * - * If the command that just executed is NOT a request - * sense, the obvious thing to do is to set the result - * code to the values of the stored parameters. - * - * If it was a REQUEST SENSE command, we need some way - * to differentiate between the failure code of the original - * and the failure code of the REQUEST sense - the obvious - * case is success, where we fall through and leave the result - * code unchanged. - * - * The non-obvious place is where the REQUEST SENSE failed - */ - - if (cmd->cmnd[0] != REQUEST_SENSE) - cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); - else if (status_byte(cmd->SCp.Status) != GOOD) - cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); + dsprintk(NDEBUG_QUEUES, instance, + "COMMAND COMPLETE %p target %d lun %llu\n", + cmd, scmd_id(cmd), cmd->device->lun); - if ((cmd->cmnd[0] == REQUEST_SENSE) && - hostdata->ses.cmd_len) { - scsi_eh_restore_cmnd(cmd, &hostdata->ses); - hostdata->ses.cmd_len = 0 ; - } - - if ((cmd->cmnd[0] != REQUEST_SENSE) && (status_byte(cmd->SCp.Status) == CHECK_CONDITION)) { - scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0); - - dprintk(NDEBUG_AUTOSENSE, "scsi%d : performing request sense\n", instance->host_no); + hostdata->connected = NULL; - LIST(cmd, hostdata->issue_queue); - cmd->host_scribble = (unsigned char *) - hostdata->issue_queue; - hostdata->issue_queue = (struct scsi_cmnd *) cmd; - dprintk(NDEBUG_QUEUES, "scsi%d : REQUEST SENSE added to head of issue queue\n", instance->host_no); - } else { - cmd->scsi_done(cmd); + cmd->result &= ~0xffff; + cmd->result |= cmd->SCp.Status; + cmd->result |= cmd->SCp.Message << 8; + + if (cmd->cmnd[0] == REQUEST_SENSE) + complete_cmd(instance, cmd); + else { + if (cmd->SCp.Status == SAM_STAT_CHECK_CONDITION || + cmd->SCp.Status == SAM_STAT_COMMAND_TERMINATED) { + dsprintk(NDEBUG_QUEUES, instance, "autosense: adding cmd %p to tail of autosense queue\n", + cmd); + list_add_tail(&ncmd->list, + &hostdata->autosense); + } else + complete_cmd(instance, cmd); } - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - /* - * Restore phase bits to 0 so an interrupted selection, + /* + * Restore phase bits to 0 so an interrupted selection, * arbitration can resume. */ NCR5380_write(TARGET_COMMAND_REG, 0); - while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected) - barrier(); + /* Enable reselect interrupts */ + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); return; case MESSAGE_REJECT: /* Accept message by clearing ACK */ @@ -2229,38 +1918,33 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { default: break; } - case DISCONNECT:{ - /* Accept message by clearing ACK */ - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - cmd->device->disconnect = 1; - LIST(cmd, hostdata->disconnected_queue); - cmd->host_scribble = (unsigned char *) - hostdata->disconnected_queue; - hostdata->connected = NULL; - hostdata->disconnected_queue = cmd; - dprintk(NDEBUG_QUEUES, "scsi%d : command for target %d lun %llu was moved from connected to" " the disconnected_queue\n", instance->host_no, cmd->device->id, cmd->device->lun); - /* - * Restore phase bits to 0 so an interrupted selection, - * arbitration can resume. - */ - NCR5380_write(TARGET_COMMAND_REG, 0); - - /* Enable reselect interrupts */ - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - /* Wait for bus free to avoid nasty timeouts - FIXME timeout !*/ - /* NCR538_poll_politely(instance, STATUS_REG, SR_BSY, 0, 30 * HZ); */ - while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected) - barrier(); - return; - } - /* + break; + case DISCONNECT: + /* Accept message by clearing ACK */ + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + hostdata->connected = NULL; + list_add(&ncmd->list, &hostdata->disconnected); + dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES, + instance, "connected command %p for target %d lun %llu moved to disconnected queue\n", + cmd, scmd_id(cmd), cmd->device->lun); + + /* + * Restore phase bits to 0 so an interrupted selection, + * arbitration can resume. + */ + NCR5380_write(TARGET_COMMAND_REG, 0); + + /* Enable reselect interrupts */ + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); + return; + /* * The SCSI data pointer is *IMPLICITLY* saved on a disconnect - * operation, in violation of the SCSI spec so we can safely + * operation, in violation of the SCSI spec so we can safely * ignore SAVE/RESTORE pointers calls. * - * Unfortunately, some disks violate the SCSI spec and + * Unfortunately, some disks violate the SCSI spec and * don't issue the required SAVE_POINTERS message before - * disconnecting, and we have to break spec to remain + * disconnecting, and we have to break spec to remain * compatible. */ case SAVE_POINTERS: @@ -2269,31 +1953,28 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); break; case EXTENDED_MESSAGE: -/* - * Extended messages are sent in the following format : - * Byte - * 0 EXTENDED_MESSAGE == 1 - * 1 length (includes one byte for code, doesn't - * include first two bytes) - * 2 code - * 3..length+1 arguments - * - * Start the extended message buffer with the EXTENDED_MESSAGE - * byte, since spi_print_msg() wants the whole thing. - */ + /* + * Start the message buffer with the EXTENDED_MESSAGE + * byte, since spi_print_msg() wants the whole thing. + */ extended_msg[0] = EXTENDED_MESSAGE; /* Accept first byte by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - dprintk(NDEBUG_EXTENDED, "scsi%d : receiving extended message\n", instance->host_no); + + spin_unlock_irq(&hostdata->lock); + + dsprintk(NDEBUG_EXTENDED, instance, "receiving extended message\n"); len = 2; data = extended_msg + 1; phase = PHASE_MSGIN; NCR5380_transfer_pio(instance, &phase, &len, &data); + dsprintk(NDEBUG_EXTENDED, instance, "length %d, code 0x%02x\n", + (int)extended_msg[1], + (int)extended_msg[2]); - dprintk(NDEBUG_EXTENDED, "scsi%d : length=%d, code=0x%02x\n", instance->host_no, (int) extended_msg[1], (int) extended_msg[2]); - - if (!len && extended_msg[1] <= (sizeof(extended_msg) - 1)) { + if (!len && extended_msg[1] > 0 && + extended_msg[1] <= sizeof(extended_msg) - 2) { /* Accept third byte by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); len = extended_msg[1] - 1; @@ -2301,7 +1982,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { phase = PHASE_MSGIN; NCR5380_transfer_pio(instance, &phase, &len, &data); - dprintk(NDEBUG_EXTENDED, "scsi%d : message received, residual %d\n", instance->host_no, len); + dsprintk(NDEBUG_EXTENDED, instance, "message received, residual %d\n", + len); switch (extended_msg[2]) { case EXTENDED_SDTR: @@ -2311,34 +1993,42 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { tmp = 0; } } else if (len) { - printk("scsi%d: error receiving extended message\n", instance->host_no); + shost_printk(KERN_ERR, instance, "error receiving extended message\n"); tmp = 0; } else { - printk("scsi%d: extended message code %02x length %d is too long\n", instance->host_no, extended_msg[2], extended_msg[1]); + shost_printk(KERN_NOTICE, instance, "extended message code %02x length %d is too long\n", + extended_msg[2], extended_msg[1]); tmp = 0; } + + spin_lock_irq(&hostdata->lock); + if (!hostdata->connected) + return; + /* Fall through to reject message */ - /* - * If we get something weird that we aren't expecting, + /* + * If we get something weird that we aren't expecting, * reject it. */ default: if (!tmp) { - printk("scsi%d: rejecting message ", instance->host_no); + shost_printk(KERN_ERR, instance, "rejecting message "); spi_print_msg(extended_msg); printk("\n"); } else if (tmp != EXTENDED_MESSAGE) scmd_printk(KERN_INFO, cmd, - "rejecting unknown message %02x\n",tmp); + "rejecting unknown message %02x\n", + tmp); else scmd_printk(KERN_INFO, cmd, - "rejecting unknown extended message code %02x, length %d\n", extended_msg[1], extended_msg[0]); + "rejecting unknown extended message code %02x, length %d\n", + extended_msg[1], extended_msg[0]); msgout = MESSAGE_REJECT; NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); break; - } /* switch (tmp) */ + } /* switch (tmp) */ break; case PHASE_MSGOUT: len = 1; @@ -2346,10 +2036,9 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { hostdata->last_message = msgout; NCR5380_transfer_pio(instance, &phase, &len, &data); if (msgout == ABORT) { - hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xFF)); hostdata->connected = NULL; cmd->result = DID_ERROR << 16; - cmd->scsi_done(cmd); + complete_cmd(instance, cmd); NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); return; } @@ -2358,17 +2047,12 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { case PHASE_CMDOUT: len = cmd->cmd_len; data = cmd->cmnd; - /* - * XXX for performance reasons, on machines with a - * PSEUDO-DMA architecture we should probably - * use the dma transfer function. + /* + * XXX for performance reasons, on machines with a + * PSEUDO-DMA architecture we should probably + * use the dma transfer function. */ NCR5380_transfer_pio(instance, &phase, &len, &data); - if (!cmd->device->disconnect && should_disconnect(cmd->cmnd[0])) { - NCR5380_set_timer(hostdata, USLEEP_SLEEP); - dprintk(NDEBUG_USLEEP, "scsi%d : issued command, sleeping until %lu\n", instance->host_no, hostdata->time_expires); - return; - } break; case PHASE_STATIN: len = 1; @@ -2377,46 +2061,37 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) { cmd->SCp.Status = tmp; break; default: - printk("scsi%d : unknown phase\n", instance->host_no); + shost_printk(KERN_ERR, instance, "unknown phase\n"); NCR5380_dprint(NDEBUG_ANY, instance); - } /* switch(phase) */ - } /* if (tmp * SR_REQ) */ - else { - /* RvC: go to sleep if polling time expired - */ - if (!cmd->device->disconnect && time_after_eq(jiffies, poll_time)) { - NCR5380_set_timer(hostdata, USLEEP_SLEEP); - dprintk(NDEBUG_USLEEP, "scsi%d : poll timed out, sleeping until %lu\n", instance->host_no, hostdata->time_expires); - return; - } + } /* switch(phase) */ + } else { + spin_unlock_irq(&hostdata->lock); + NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ); + spin_lock_irq(&hostdata->lock); } - } /* while (1) */ + } } /* * Function : void NCR5380_reselect (struct Scsi_Host *instance) * - * Purpose : does reselection, initializing the instance->connected - * field to point to the scsi_cmnd for which the I_T_L or I_T_L_Q - * nexus has been reestablished, - * - * Inputs : instance - this instance of the NCR5380. + * Purpose : does reselection, initializing the instance->connected + * field to point to the scsi_cmnd for which the I_T_L or I_T_L_Q + * nexus has been reestablished, * - * Locks: io_request_lock held by caller if IRQ driven + * Inputs : instance - this instance of the NCR5380. */ -static void NCR5380_reselect(struct Scsi_Host *instance) { - NCR5380_local_declare(); - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) - instance->hostdata; +static void NCR5380_reselect(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); unsigned char target_mask; unsigned char lun, phase; int len; unsigned char msg[3]; unsigned char *data; - struct scsi_cmnd *tmp = NULL, *prev; - int abort = 0; - NCR5380_setup(instance); + struct NCR5380_cmd *ncmd; + struct scsi_cmnd *tmp; /* * Disable arbitration, etc. since the host adapter obviously @@ -2424,12 +2099,12 @@ static void NCR5380_reselect(struct Scsi_Host *instance) { */ NCR5380_write(MODE_REG, MR_BASE); - hostdata->restart_select = 1; target_mask = NCR5380_read(CURRENT_SCSI_DATA_REG) & ~(hostdata->id_mask); - dprintk(NDEBUG_SELECTION, "scsi%d : reselect\n", instance->host_no); - /* + dsprintk(NDEBUG_RESELECTION, instance, "reselect\n"); + + /* * At this point, we have detected that our SCSI ID is on the bus, * SEL is true and BSY was false for at least one bus settle delay * (400 ns). @@ -2439,103 +2114,110 @@ static void NCR5380_reselect(struct Scsi_Host *instance) { */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY); - - /* FIXME: timeout too long, must fail to workqueue */ - if(NCR5380_poll_politely(instance, STATUS_REG, SR_SEL, 0, 2*HZ)<0) - abort = 1; - + if (NCR5380_poll_politely(instance, + STATUS_REG, SR_SEL, 0, 2 * HZ) < 0) { + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + return; + } NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); /* * Wait for target to go into MSGIN. - * FIXME: timeout needed and fail to work queeu */ - if(NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 2*HZ)) - abort = 1; + if (NCR5380_poll_politely(instance, + STATUS_REG, SR_REQ, SR_REQ, 2 * HZ) < 0) { + do_abort(instance); + return; + } len = 1; data = msg; phase = PHASE_MSGIN; NCR5380_transfer_pio(instance, &phase, &len, &data); + if (len) { + do_abort(instance); + return; + } + if (!(msg[0] & 0x80)) { - printk(KERN_ERR "scsi%d : expecting IDENTIFY message, got ", instance->host_no); + shost_printk(KERN_ERR, instance, "expecting IDENTIFY message, got "); spi_print_msg(msg); - abort = 1; - } else { - /* Accept message by clearing ACK */ - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - lun = (msg[0] & 0x07); + printk("\n"); + do_abort(instance); + return; + } + lun = msg[0] & 0x07; - /* - * We need to add code for SCSI-II to track which devices have - * I_T_L_Q nexuses established, and which have simple I_T_L - * nexuses so we can chose to do additional data transfer. - */ + /* + * We need to add code for SCSI-II to track which devices have + * I_T_L_Q nexuses established, and which have simple I_T_L + * nexuses so we can chose to do additional data transfer. + */ - /* - * Find the command corresponding to the I_T_L or I_T_L_Q nexus we - * just reestablished, and remove it from the disconnected queue. - */ + /* + * Find the command corresponding to the I_T_L or I_T_L_Q nexus we + * just reestablished, and remove it from the disconnected queue. + */ + tmp = NULL; + list_for_each_entry(ncmd, &hostdata->disconnected, list) { + struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd); - for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue, prev = NULL; tmp; prev = tmp, tmp = (struct scsi_cmnd *) tmp->host_scribble) - if ((target_mask == (1 << tmp->device->id)) && (lun == (u8)tmp->device->lun) - ) { - if (prev) { - REMOVE(prev, prev->host_scribble, tmp, tmp->host_scribble); - prev->host_scribble = tmp->host_scribble; - } else { - REMOVE(-1, hostdata->disconnected_queue, tmp, tmp->host_scribble); - hostdata->disconnected_queue = (struct scsi_cmnd *) tmp->host_scribble; - } - tmp->host_scribble = NULL; - break; - } - if (!tmp) { - printk(KERN_ERR "scsi%d : warning : target bitmask %02x lun %d not in disconnect_queue.\n", instance->host_no, target_mask, lun); - /* - * Since we have an established nexus that we can't do anything with, - * we must abort it. - */ - abort = 1; + if (target_mask == (1 << scmd_id(cmd)) && + lun == (u8)cmd->device->lun) { + list_del(&ncmd->list); + tmp = cmd; + break; } } - if (abort) { - do_abort(instance); + if (tmp) { + dsprintk(NDEBUG_RESELECTION | NDEBUG_QUEUES, instance, + "reselect: removed %p from disconnected queue\n", tmp); } else { - hostdata->connected = tmp; - dprintk(NDEBUG_RESELECTION, "scsi%d : nexus established, target = %d, lun = %llu, tag = %d\n", instance->host_no, tmp->device->id, tmp->device->lun, tmp->tag); + shost_printk(KERN_ERR, instance, "target bitmask 0x%02x lun %d not in disconnected queue.\n", + target_mask, lun); + /* + * Since we have an established nexus that we can't do anything + * with, we must abort it. + */ + do_abort(instance); + return; } + + /* Accept message by clearing ACK */ + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + + hostdata->connected = tmp; + dsprintk(NDEBUG_RESELECTION, instance, "nexus established, target %d, lun %llu, tag %d\n", + scmd_id(tmp), tmp->device->lun, tmp->tag); } /* * Function : void NCR5380_dma_complete (struct Scsi_Host *instance) * * Purpose : called by interrupt handler when DMA finishes or a phase - * mismatch occurs (which would finish the DMA transfer). + * mismatch occurs (which would finish the DMA transfer). * * Inputs : instance - this instance of the NCR5380. * * Returns : pointer to the scsi_cmnd structure for which the I_T_L - * nexus has been reestablished, on failure NULL is returned. + * nexus has been reestablished, on failure NULL is returned. */ #ifdef REAL_DMA static void NCR5380_dma_complete(NCR5380_instance * instance) { - NCR5380_local_declare(); - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; + struct NCR5380_hostdata *hostdata = shost_priv(instance); int transferred; - NCR5380_setup(instance); /* * XXX this might not be right. * * Wait for final byte to transfer, ie wait for ACK to go false. * - * We should use the Last Byte Sent bit, unfortunately this is + * We should use the Last Byte Sent bit, unfortunately this is * not available on the 5380/5381 (only the various CMOS chips) * * FIXME: timeout, and need to handle long timeout/irq case @@ -2543,7 +2225,6 @@ static void NCR5380_dma_complete(NCR5380_instance * instance) { NCR5380_poll_politely(instance, BUS_AND_STATUS_REG, BASR_ACK, 0, 5*HZ); - NCR5380_write(MODE_REG, MR_BASE); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); /* @@ -2560,190 +2241,251 @@ static void NCR5380_dma_complete(NCR5380_instance * instance) { } #endif /* def REAL_DMA */ -/* - * Function : int NCR5380_abort (struct scsi_cmnd *cmd) - * - * Purpose : abort a command - * - * Inputs : cmd - the scsi_cmnd to abort, code - code to set the - * host byte of the result field to, if zero DID_ABORTED is - * used. - * - * Returns : SUCCESS - success, FAILED on failure. - * - * XXX - there is no way to abort the command that is currently - * connected, you have to wait for it to complete. If this is - * a problem, we could implement longjmp() / setjmp(), setjmp() - * called where the loop started in NCR5380_main(). - * - * Locks: host lock taken by caller +/** + * list_find_cmd - test for presence of a command in a linked list + * @haystack: list of commands + * @needle: command to search for */ -static int NCR5380_abort(struct scsi_cmnd *cmd) +static bool list_find_cmd(struct list_head *haystack, + struct scsi_cmnd *needle) { - NCR5380_local_declare(); - struct Scsi_Host *instance = cmd->device->host; - struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata; - struct scsi_cmnd *tmp, **prev; + struct NCR5380_cmd *ncmd; - scmd_printk(KERN_WARNING, cmd, "aborting command\n"); + list_for_each_entry(ncmd, haystack, list) + if (NCR5380_to_scmd(ncmd) == needle) + return true; + return false; +} - NCR5380_print_status(instance); +/** + * list_remove_cmd - remove a command from linked list + * @haystack: list of commands + * @needle: command to remove + */ - NCR5380_setup(instance); +static bool list_del_cmd(struct list_head *haystack, + struct scsi_cmnd *needle) +{ + if (list_find_cmd(haystack, needle)) { + struct NCR5380_cmd *ncmd = scsi_cmd_priv(needle); - dprintk(NDEBUG_ABORT, "scsi%d : abort called\n", instance->host_no); - dprintk(NDEBUG_ABORT, " basr 0x%X, sr 0x%X\n", NCR5380_read(BUS_AND_STATUS_REG), NCR5380_read(STATUS_REG)); + list_del(&ncmd->list); + return true; + } + return false; +} -#if 0 -/* - * Case 1 : If the command is the currently executing command, - * we'll set the aborted flag and return control so that - * information transfer routine can exit cleanly. +/** + * NCR5380_abort - scsi host eh_abort_handler() method + * @cmd: the command to be aborted + * + * Try to abort a given command by removing it from queues and/or sending + * the target an abort message. This may not succeed in causing a target + * to abort the command. Nonetheless, the low-level driver must forget about + * the command because the mid-layer reclaims it and it may be re-issued. + * + * The normal path taken by a command is as follows. For EH we trace this + * same path to locate and abort the command. + * + * unissued -> selecting -> [unissued -> selecting ->]... connected -> + * [disconnected -> connected ->]... + * [autosense -> connected ->] done + * + * If cmd is unissued then just remove it. + * If cmd is disconnected, try to select the target. + * If cmd is connected, try to send an abort message. + * If cmd is waiting for autosense, give it a chance to complete but check + * that it isn't left connected. + * If cmd was not found at all then presumably it has already been completed, + * in which case return SUCCESS to try to avoid further EH measures. + * If the command has not completed yet, we must not fail to find it. */ - if (hostdata->connected == cmd) { - dprintk(NDEBUG_ABORT, "scsi%d : aborting connected command\n", instance->host_no); - hostdata->aborted = 1; -/* - * We should perform BSY checking, and make sure we haven't slipped - * into BUS FREE. - */ +static int NCR5380_abort(struct scsi_cmnd *cmd) +{ + struct Scsi_Host *instance = cmd->device->host; + struct NCR5380_hostdata *hostdata = shost_priv(instance); + unsigned long flags; + int result = SUCCESS; - NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_ATN); -/* - * Since we can't change phases until we've completed the current - * handshake, we have to source or sink a byte of data if the current - * phase is not MSGOUT. - */ + spin_lock_irqsave(&hostdata->lock, flags); -/* - * Return control to the executing NCR drive so we can clear the - * aborted flag and get back into our main loop. - */ +#if (NDEBUG & NDEBUG_ANY) + scmd_printk(KERN_INFO, cmd, __func__); +#endif + NCR5380_dprint(NDEBUG_ANY, instance); + NCR5380_dprint_phase(NDEBUG_ANY, instance); - return SUCCESS; + if (list_del_cmd(&hostdata->unissued, cmd)) { + dsprintk(NDEBUG_ABORT, instance, + "abort: removed %p from issue queue\n", cmd); + cmd->result = DID_ABORT << 16; + cmd->scsi_done(cmd); /* No tag or busy flag to worry about */ } -#endif -/* - * Case 2 : If the command hasn't been issued yet, we simply remove it - * from the issue queue. - */ - - dprintk(NDEBUG_ABORT, "scsi%d : abort going into loop.\n", instance->host_no); - for (prev = (struct scsi_cmnd **) &(hostdata->issue_queue), tmp = (struct scsi_cmnd *) hostdata->issue_queue; tmp; prev = (struct scsi_cmnd **) &(tmp->host_scribble), tmp = (struct scsi_cmnd *) tmp->host_scribble) - if (cmd == tmp) { - REMOVE(5, *prev, tmp, tmp->host_scribble); - (*prev) = (struct scsi_cmnd *) tmp->host_scribble; - tmp->host_scribble = NULL; - tmp->result = DID_ABORT << 16; - dprintk(NDEBUG_ABORT, "scsi%d : abort removed command from issue queue.\n", instance->host_no); - tmp->scsi_done(tmp); - return SUCCESS; + if (hostdata->selecting == cmd) { + dsprintk(NDEBUG_ABORT, instance, + "abort: cmd %p == selecting\n", cmd); + hostdata->selecting = NULL; + cmd->result = DID_ABORT << 16; + complete_cmd(instance, cmd); + goto out; + } + + if (list_del_cmd(&hostdata->disconnected, cmd)) { + dsprintk(NDEBUG_ABORT, instance, + "abort: removed %p from disconnected list\n", cmd); + cmd->result = DID_ERROR << 16; + if (!hostdata->connected) + NCR5380_select(instance, cmd); + if (hostdata->connected != cmd) { + complete_cmd(instance, cmd); + result = FAILED; + goto out; + } + } + + if (hostdata->connected == cmd) { + dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd); + hostdata->connected = NULL; + if (do_abort(instance)) { + set_host_byte(cmd, DID_ERROR); + complete_cmd(instance, cmd); + result = FAILED; + goto out; } -#if (NDEBUG & NDEBUG_ABORT) - /* KLL */ - else if (prev == tmp) - printk(KERN_ERR "scsi%d : LOOP\n", instance->host_no); + set_host_byte(cmd, DID_ABORT); +#ifdef REAL_DMA + hostdata->dma_len = 0; #endif + if (cmd->cmnd[0] == REQUEST_SENSE) + complete_cmd(instance, cmd); + else { + struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); -/* - * Case 3 : If any commands are connected, we're going to fail the abort - * and let the high level SCSI driver retry at a later time or - * issue a reset. - * - * Timeouts, and therefore aborted commands, will be highly unlikely - * and handling them cleanly in this situation would make the common - * case of noresets less efficient, and would pollute our code. So, - * we fail. - */ + /* Perform autosense for this command */ + list_add(&ncmd->list, &hostdata->autosense); + } + } - if (hostdata->connected) { - dprintk(NDEBUG_ABORT, "scsi%d : abort failed, command connected.\n", instance->host_no); - return FAILED; + if (list_find_cmd(&hostdata->autosense, cmd)) { + dsprintk(NDEBUG_ABORT, instance, + "abort: found %p on sense queue\n", cmd); + spin_unlock_irqrestore(&hostdata->lock, flags); + queue_work(hostdata->work_q, &hostdata->main_task); + msleep(1000); + spin_lock_irqsave(&hostdata->lock, flags); + if (list_del_cmd(&hostdata->autosense, cmd)) { + dsprintk(NDEBUG_ABORT, instance, + "abort: removed %p from sense queue\n", cmd); + set_host_byte(cmd, DID_ABORT); + complete_cmd(instance, cmd); + goto out; + } } -/* - * Case 4: If the command is currently disconnected from the bus, and - * there are no connected commands, we reconnect the I_T_L or - * I_T_L_Q nexus associated with it, go into message out, and send - * an abort message. - * - * This case is especially ugly. In order to reestablish the nexus, we - * need to call NCR5380_select(). The easiest way to implement this - * function was to abort if the bus was busy, and let the interrupt - * handler triggered on the SEL for reselect take care of lost arbitrations - * where necessary, meaning interrupts need to be enabled. - * - * When interrupts are enabled, the queues may change - so we - * can't remove it from the disconnected queue before selecting it - * because that could cause a failure in hashing the nexus if that - * device reselected. - * - * Since the queues may change, we can't use the pointers from when we - * first locate it. - * - * So, we must first locate the command, and if NCR5380_select() - * succeeds, then issue the abort, relocate the command and remove - * it from the disconnected queue. - */ - for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp; tmp = (struct scsi_cmnd *) tmp->host_scribble) - if (cmd == tmp) { - dprintk(NDEBUG_ABORT, "scsi%d : aborting disconnected command.\n", instance->host_no); + if (hostdata->connected == cmd) { + dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd); + hostdata->connected = NULL; + if (do_abort(instance)) { + set_host_byte(cmd, DID_ERROR); + complete_cmd(instance, cmd); + result = FAILED; + goto out; + } + set_host_byte(cmd, DID_ABORT); +#ifdef REAL_DMA + hostdata->dma_len = 0; +#endif + complete_cmd(instance, cmd); + } - if (NCR5380_select(instance, cmd)) - return FAILED; - dprintk(NDEBUG_ABORT, "scsi%d : nexus reestablished.\n", instance->host_no); +out: + if (result == FAILED) + dsprintk(NDEBUG_ABORT, instance, "abort: failed to abort %p\n", cmd); + else + dsprintk(NDEBUG_ABORT, instance, "abort: successfully aborted %p\n", cmd); - do_abort(instance); + queue_work(hostdata->work_q, &hostdata->main_task); + spin_unlock_irqrestore(&hostdata->lock, flags); - for (prev = (struct scsi_cmnd **) &(hostdata->disconnected_queue), tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp; prev = (struct scsi_cmnd **) &(tmp->host_scribble), tmp = (struct scsi_cmnd *) tmp->host_scribble) - if (cmd == tmp) { - REMOVE(5, *prev, tmp, tmp->host_scribble); - *prev = (struct scsi_cmnd *) tmp->host_scribble; - tmp->host_scribble = NULL; - tmp->result = DID_ABORT << 16; - tmp->scsi_done(tmp); - return SUCCESS; - } - } -/* - * Case 5 : If we reached this point, the command was not found in any of - * the queues. - * - * We probably reached this point because of an unlikely race condition - * between the command completing successfully and the abortion code, - * so we won't panic, but we will notify the user in case something really - * broke. - */ - printk(KERN_WARNING "scsi%d : warning : SCSI command probably completed successfully\n" - " before abortion\n", instance->host_no); - return FAILED; + return result; } -/* - * Function : int NCR5380_bus_reset (struct scsi_cmnd *cmd) - * - * Purpose : reset the SCSI bus. - * - * Returns : SUCCESS +/** + * NCR5380_bus_reset - reset the SCSI bus + * @cmd: SCSI command undergoing EH * - * Locks: host lock taken by caller + * Returns SUCCESS */ static int NCR5380_bus_reset(struct scsi_cmnd *cmd) { struct Scsi_Host *instance = cmd->device->host; + struct NCR5380_hostdata *hostdata = shost_priv(instance); + int i; + unsigned long flags; + struct NCR5380_cmd *ncmd; - NCR5380_local_declare(); - NCR5380_setup(instance); - NCR5380_print_status(instance); + spin_lock_irqsave(&hostdata->lock, flags); + +#if (NDEBUG & NDEBUG_ANY) + scmd_printk(KERN_INFO, cmd, __func__); +#endif + NCR5380_dprint(NDEBUG_ANY, instance); + NCR5380_dprint_phase(NDEBUG_ANY, instance); - spin_lock_irq(instance->host_lock); do_reset(instance); - spin_unlock_irq(instance->host_lock); + + /* reset NCR registers */ + NCR5380_write(MODE_REG, MR_BASE); + NCR5380_write(TARGET_COMMAND_REG, 0); + NCR5380_write(SELECT_ENABLE_REG, 0); + + /* After the reset, there are no more connected or disconnected commands + * and no busy units; so clear the low-level status here to avoid + * conflicts when the mid-level code tries to wake up the affected + * commands! + */ + + hostdata->selecting = NULL; + + list_for_each_entry(ncmd, &hostdata->disconnected, list) { + struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd); + + set_host_byte(cmd, DID_RESET); + cmd->scsi_done(cmd); + } + + list_for_each_entry(ncmd, &hostdata->autosense, list) { + struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd); + + set_host_byte(cmd, DID_RESET); + cmd->scsi_done(cmd); + } + + if (hostdata->connected) { + set_host_byte(hostdata->connected, DID_RESET); + complete_cmd(instance, hostdata->connected); + hostdata->connected = NULL; + } + + if (hostdata->sensing) { + set_host_byte(hostdata->connected, DID_RESET); + complete_cmd(instance, hostdata->sensing); + hostdata->sensing = NULL; + } + + for (i = 0; i < 8; ++i) + hostdata->busy[i] = 0; +#ifdef REAL_DMA + hostdata->dma_len = 0; +#endif + + queue_work(hostdata->work_q, &hostdata->main_task); + spin_unlock_irqrestore(&hostdata->lock, flags); return SUCCESS; } diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h index 162112dd1bf8..a79288682a74 100644 --- a/drivers/scsi/NCR5380.h +++ b/drivers/scsi/NCR5380.h @@ -22,8 +22,13 @@ #ifndef NCR5380_H #define NCR5380_H +#include <linux/delay.h> #include <linux/interrupt.h> +#include <linux/list.h> +#include <linux/workqueue.h> +#include <scsi/scsi_dbg.h> #include <scsi/scsi_eh.h> +#include <scsi/scsi_transport_spi.h> #define NDEBUG_ARBITRATION 0x1 #define NDEBUG_AUTOSENSE 0x2 @@ -158,8 +163,7 @@ /* Write any value to this register to start an ini mode DMA receive */ #define START_DMA_INITIATOR_RECEIVE_REG 7 /* wo */ -#define C400_CONTROL_STATUS_REG NCR53C400_register_offset-8 /* rw */ - +/* NCR 53C400(A) Control Status Register bits: */ #define CSR_RESET 0x80 /* wo Resets 53c400 */ #define CSR_53C80_REG 0x80 /* ro 5380 registers busy */ #define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */ @@ -176,16 +180,6 @@ #define CSR_BASE CSR_53C80_INTR #endif -/* Number of 128-byte blocks to be transferred */ -#define C400_BLOCK_COUNTER_REG NCR53C400_register_offset-7 /* rw */ - -/* Resume transfer after disconnect */ -#define C400_RESUME_TRANSFER_REG NCR53C400_register_offset-6 /* wo */ - -/* Access to host buffer stack */ -#define C400_HOST_BUFFER NCR53C400_register_offset-4 /* rw */ - - /* Note : PHASE_* macros are based on the values of the STATUS register */ #define PHASE_MASK (SR_MSG | SR_CD | SR_IO) @@ -205,16 +199,6 @@ #define PHASE_SR_TO_TCR(phase) ((phase) >> 2) -/* - * The internal should_disconnect() function returns these based on the - * expected length of a disconnect if a device supports disconnect/ - * reconnect. - */ - -#define DISCONNECT_NONE 0 -#define DISCONNECT_TIME_TO_DATA 1 -#define DISCONNECT_LONG 2 - /* * "Special" value for the (unsigned char) command tag, to indicate * I_T_L nexus instead of I_T_L_Q. @@ -236,15 +220,11 @@ #define NO_IRQ 0 #endif -#define FLAG_HAS_LAST_BYTE_SENT 1 /* NCR53c81 or better */ -#define FLAG_CHECK_LAST_BYTE_SENT 2 /* Only test once */ -#define FLAG_NCR53C400 4 /* NCR53c400 */ +#define FLAG_NO_DMA_FIXUP 1 /* No DMA errata workarounds */ #define FLAG_NO_PSEUDO_DMA 8 /* Inhibit DMA */ -#define FLAG_DTC3181E 16 /* DTC3181E */ #define FLAG_LATE_DMA_SETUP 32 /* Setup NCR before DMA H/W */ #define FLAG_TAGGED_QUEUING 64 /* as X3T9.2 spelled it */ - -#ifndef ASM +#define FLAG_TOSHIBA_DELAY 128 /* Allow for borken CD-ROMs */ #ifdef SUPPORT_TAGS struct tag_alloc { @@ -258,33 +238,24 @@ struct NCR5380_hostdata { NCR5380_implementation_fields; /* implementation specific */ struct Scsi_Host *host; /* Host backpointer */ unsigned char id_mask, id_higher_mask; /* 1 << id, all bits greater */ - unsigned char targets_present; /* targets we have connected - to, so we can call a select - failure a retryable condition */ - volatile unsigned char busy[8]; /* index = target, bit = lun */ + unsigned char busy[8]; /* index = target, bit = lun */ #if defined(REAL_DMA) || defined(REAL_DMA_POLL) - volatile int dma_len; /* requested length of DMA */ + int dma_len; /* requested length of DMA */ #endif - volatile unsigned char last_message; /* last message OUT */ - volatile struct scsi_cmnd *connected; /* currently connected command */ - volatile struct scsi_cmnd *issue_queue; /* waiting to be issued */ - volatile struct scsi_cmnd *disconnected_queue; /* waiting for reconnect */ - volatile int restart_select; /* we have disconnected, - used to restart - NCR5380_select() */ - volatile unsigned aborted:1; /* flag, says aborted */ + unsigned char last_message; /* last message OUT */ + struct scsi_cmnd *connected; /* currently connected cmnd */ + struct scsi_cmnd *selecting; /* cmnd to be connected */ + struct list_head unissued; /* waiting to be issued */ + struct list_head autosense; /* priority issue queue */ + struct list_head disconnected; /* waiting for reconnect */ + spinlock_t lock; /* protects this struct */ int flags; - unsigned long time_expires; /* in jiffies, set prior to sleeping */ - int select_time; /* timer in select for target response */ - volatile struct scsi_cmnd *selecting; - struct delayed_work coroutine; /* our co-routine */ struct scsi_eh_save ses; + struct scsi_cmnd *sensing; char info[256]; int read_overruns; /* number of bytes to cut from a * transfer to handle chip overruns */ - int retain_dma_intr; struct work_struct main_task; - volatile int main_running; #ifdef SUPPORT_TAGS struct tag_alloc TagAlloc[8][8]; /* 8 targets and 8 LUNs */ #endif @@ -292,10 +263,23 @@ struct NCR5380_hostdata { unsigned spin_max_r; unsigned spin_max_w; #endif + struct workqueue_struct *work_q; + unsigned long accesses_per_ms; /* chip register accesses per ms */ }; #ifdef __KERNEL__ +struct NCR5380_cmd { + struct list_head list; +}; + +#define NCR5380_CMD_SIZE (sizeof(struct NCR5380_cmd)) + +static inline struct scsi_cmnd *NCR5380_to_scmd(struct NCR5380_cmd *ncmd_ptr) +{ + return ((struct scsi_cmnd *)ncmd_ptr) - 1; +} + #ifndef NDEBUG #define NDEBUG (0) #endif @@ -304,6 +288,11 @@ struct NCR5380_hostdata { do { if ((NDEBUG) & (flg)) \ printk(KERN_DEBUG fmt, ## __VA_ARGS__); } while (0) +#define dsprintk(flg, host, fmt, ...) \ + do { if ((NDEBUG) & (flg)) \ + shost_printk(KERN_DEBUG, host, fmt, ## __VA_ARGS__); \ + } while (0) + #if NDEBUG #define NCR5380_dprint(flg, arg) \ do { if ((NDEBUG) & (flg)) NCR5380_print(arg); } while (0) @@ -320,6 +309,7 @@ static void NCR5380_print(struct Scsi_Host *instance); static int NCR5380_probe_irq(struct Scsi_Host *instance, int possible); #endif static int NCR5380_init(struct Scsi_Host *instance, int flags); +static int NCR5380_maybe_reset_bus(struct Scsi_Host *); static void NCR5380_exit(struct Scsi_Host *instance); static void NCR5380_information_transfer(struct Scsi_Host *instance); #ifndef DONT_USE_INTR @@ -328,7 +318,7 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id); static void NCR5380_main(struct work_struct *work); static const char *NCR5380_info(struct Scsi_Host *instance); static void NCR5380_reselect(struct Scsi_Host *instance); -static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd); +static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *, struct scsi_cmnd *); #if defined(PSEUDO_DMA) || defined(REAL_DMA) || defined(REAL_DMA_POLL) static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data); #endif @@ -443,5 +433,4 @@ static __inline__ int NCR5380_pc_dma_residual(struct Scsi_Host *instance) #endif /* defined(i386) || defined(__alpha__) */ #endif /* defined(REAL_DMA) */ #endif /* __KERNEL__ */ -#endif /* ndef ASM */ #endif /* NCR5380_H */ diff --git a/drivers/scsi/arm/cumana_1.c b/drivers/scsi/arm/cumana_1.c index d28d6c0f18c0..221f18c5df93 100644 --- a/drivers/scsi/arm/cumana_1.c +++ b/drivers/scsi/arm/cumana_1.c @@ -4,9 +4,7 @@ * Copyright 1995-2002, Russell King */ #include <linux/module.h> -#include <linux/signal.h> #include <linux/ioport.h> -#include <linux/delay.h> #include <linux/blkdev.h> #include <linux/init.h> @@ -15,15 +13,14 @@ #include <scsi/scsi_host.h> -#include <scsi/scsicam.h> - #define PSEUDO_DMA #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata) -#define NCR5380_local_declare() struct Scsi_Host *_instance -#define NCR5380_setup(instance) _instance = instance -#define NCR5380_read(reg) cumanascsi_read(_instance, reg) -#define NCR5380_write(reg, value) cumanascsi_write(_instance, reg, value) +#define NCR5380_read(reg) cumanascsi_read(instance, reg) +#define NCR5380_write(reg, value) cumanascsi_write(instance, reg, value) + +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) + #define NCR5380_intr cumanascsi_intr #define NCR5380_queue_command cumanascsi_queue_command #define NCR5380_info cumanascsi_info @@ -211,6 +208,8 @@ static struct scsi_host_template cumanascsi_template = { .cmd_per_lun = 2, .use_clustering = DISABLE_CLUSTERING, .proc_name = "CumanaSCSI-1", + .cmd_size = NCR5380_CMD_SIZE, + .max_sectors = 128, }; static int cumanascsi1_probe(struct expansion_card *ec, @@ -240,23 +239,21 @@ static int cumanascsi1_probe(struct expansion_card *ec, host->irq = ec->irq; - NCR5380_init(host, 0); + ret = NCR5380_init(host, 0); + if (ret) + goto out_unmap; + + NCR5380_maybe_reset_bus(host); priv(host)->ctrl = 0; writeb(0, priv(host)->base + CTRL); - host->n_io_port = 255; - if (!(request_region(host->io_port, host->n_io_port, "CumanaSCSI-1"))) { - ret = -EBUSY; - goto out_unmap; - } - ret = request_irq(host->irq, cumanascsi_intr, 0, "CumanaSCSI-1", host); if (ret) { printk("scsi%d: IRQ%d not free: %d\n", host->host_no, host->irq, ret); - goto out_unmap; + goto out_exit; } ret = scsi_add_host(host, &ec->dev); @@ -268,6 +265,8 @@ static int cumanascsi1_probe(struct expansion_card *ec, out_free_irq: free_irq(host->irq, host); + out_exit: + NCR5380_exit(host); out_unmap: iounmap(priv(host)->base); iounmap(priv(host)->dma); diff --git a/drivers/scsi/arm/oak.c b/drivers/scsi/arm/oak.c index 7c6fa1479c9c..1fab1d1896b1 100644 --- a/drivers/scsi/arm/oak.c +++ b/drivers/scsi/arm/oak.c @@ -5,9 +5,7 @@ */ #include <linux/module.h> -#include <linux/signal.h> #include <linux/ioport.h> -#include <linux/delay.h> #include <linux/blkdev.h> #include <linux/init.h> @@ -20,14 +18,16 @@ #define DONT_USE_INTR #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata) -#define NCR5380_local_declare() void __iomem *_base -#define NCR5380_setup(host) _base = priv(host)->base -#define NCR5380_read(reg) readb(_base + ((reg) << 2)) -#define NCR5380_write(reg, value) writeb(value, _base + ((reg) << 2)) +#define NCR5380_read(reg) \ + readb(priv(instance)->base + ((reg) << 2)) +#define NCR5380_write(reg, value) \ + writeb(value, priv(instance)->base + ((reg) << 2)) + +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) + #define NCR5380_queue_command oakscsi_queue_command #define NCR5380_info oakscsi_info -#define NCR5380_show_info oakscsi_show_info #define NCR5380_implementation_fields \ void __iomem *base @@ -103,7 +103,6 @@ printk("reading %p len %d\n", addr, len); static struct scsi_host_template oakscsi_template = { .module = THIS_MODULE, - .show_info = oakscsi_show_info, .name = "Oak 16-bit SCSI", .info = oakscsi_info, .queuecommand = oakscsi_queue_command, @@ -115,6 +114,8 @@ static struct scsi_host_template oakscsi_template = { .cmd_per_lun = 2, .use_clustering = DISABLE_CLUSTERING, .proc_name = "oakscsi", + .cmd_size = NCR5380_CMD_SIZE, + .max_sectors = 128, }; static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id) @@ -142,15 +143,21 @@ static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id) host->irq = NO_IRQ; host->n_io_port = 255; - NCR5380_init(host, 0); + ret = NCR5380_init(host, 0); + if (ret) + goto out_unmap; + + NCR5380_maybe_reset_bus(host); ret = scsi_add_host(host, &ec->dev); if (ret) - goto out_unmap; + goto out_exit; scsi_scan_host(host); goto out; + out_exit: + NCR5380_exit(host); out_unmap: iounmap(priv(host)->base); unreg: diff --git a/drivers/scsi/atari_NCR5380.c b/drivers/scsi/atari_NCR5380.c index db87ece6edb2..e65478651ca9 100644 --- a/drivers/scsi/atari_NCR5380.c +++ b/drivers/scsi/atari_NCR5380.c @@ -1,15 +1,15 @@ /* * NCR 5380 generic driver routines. These should make it *trivial* - * to implement 5380 SCSI drivers under Linux with a non-trantor - * architecture. + * to implement 5380 SCSI drivers under Linux with a non-trantor + * architecture. * - * Note that these routines also work with NR53c400 family chips. + * Note that these routines also work with NR53c400 family chips. * * Copyright 1993, Drew Eckhardt - * Visionary Computing - * (Unix and Linux consulting and custom programming) - * drew@colorado.edu - * +1 (303) 666-5836 + * Visionary Computing + * (Unix and Linux consulting and custom programming) + * drew@colorado.edu + * +1 (303) 666-5836 * * For more information, please consult * @@ -24,84 +24,10 @@ * 1+ (800) 334-5454 */ -/* - * ++roman: To port the 5380 driver to the Atari, I had to do some changes in - * this file, too: - * - * - Some of the debug statements were incorrect (undefined variables and the - * like). I fixed that. - * - * - In information_transfer(), I think a #ifdef was wrong. Looking at the - * possible DMA transfer size should also happen for REAL_DMA. I added this - * in the #if statement. - * - * - When using real DMA, information_transfer() should return in a DATAOUT - * phase after starting the DMA. It has nothing more to do. - * - * - The interrupt service routine should run main after end of DMA, too (not - * only after RESELECTION interrupts). Additionally, it should _not_ test - * for more interrupts after running main, since a DMA process may have - * been started and interrupts are turned on now. The new int could happen - * inside the execution of NCR5380_intr(), leading to recursive - * calls. - * - * - I've added a function merge_contiguous_buffers() that tries to - * merge scatter-gather buffers that are located at contiguous - * physical addresses and can be processed with the same DMA setup. - * Since most scatter-gather operations work on a page (4K) of - * 4 buffers (1K), in more than 90% of all cases three interrupts and - * DMA setup actions are saved. - * - * - I've deleted all the stuff for AUTOPROBE_IRQ, REAL_DMA_POLL, PSEUDO_DMA - * and USLEEP, because these were messing up readability and will never be - * needed for Atari SCSI. - * - * - I've revised the NCR5380_main() calling scheme (relax the 'main_running' - * stuff), and 'main' is executed in a bottom half if awoken by an - * interrupt. - * - * - The code was quite cluttered up by "#if (NDEBUG & NDEBUG_*) printk..." - * constructs. In my eyes, this made the source rather unreadable, so I - * finally replaced that by the *_PRINTK() macros. - * - */ - -/* - * Further development / testing that should be done : - * 1. Test linked command handling code after Eric is ready with - * the high level code. - */ +/* Ported to Atari by Roman Hodek and others. */ /* Adapted for the sun3 by Sam Creasey. */ -#include <scsi/scsi_dbg.h> -#include <scsi/scsi_transport_spi.h> - -#if (NDEBUG & NDEBUG_LISTS) -#define LIST(x, y) \ - do { \ - printk("LINE:%d Adding %p to %p\n", \ - __LINE__, (void*)(x), (void*)(y)); \ - if ((x) == (y)) \ - udelay(5); \ - } while (0) -#define REMOVE(w, x, y, z) \ - do { \ - printk("LINE:%d Removing: %p->%p %p->%p \n", \ - __LINE__, (void*)(w), (void*)(x), \ - (void*)(y), (void*)(z)); \ - if ((x) == (y)) \ - udelay(5); \ - } while (0) -#else -#define LIST(x,y) -#define REMOVE(w,x,y,z) -#endif - -#ifndef notyet -#undef LINKED -#endif - /* * Design * @@ -126,17 +52,7 @@ * piece of hardware that requires you to sit in a loop polling for * the REQ signal as long as you are connected. Some devices are * brain dead (ie, many TEXEL CD ROM drives) and won't disconnect - * while doing long seek operations. - * - * The workaround for this is to keep track of devices that have - * disconnected. If the device hasn't disconnected, for commands that - * should disconnect, we do something like - * - * while (!REQ is asserted) { sleep for N usecs; poll for M usecs } - * - * Some tweaking of N and M needs to be done. An algorithm based - * on "time to data" would give the best results as long as short time - * to datas (ie, on the same track) were considered, however these + * while doing long seek operations. [...] These * broken devices are the exception rather than the rule and I'd rather * spend my time optimizing for the normal case. * @@ -177,12 +93,10 @@ * * These macros control options : * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically - * for commands that return with a CHECK CONDITION status. + * for commands that return with a CHECK CONDITION status. * * DIFFERENTIAL - if defined, NCR53c81 chips will use external differential - * transceivers. - * - * LINKED - if defined, linked commands are supported. + * transceivers. * * REAL_DMA - if defined, REAL DMA is used during the data transfer phases. * @@ -195,17 +109,17 @@ * NCR5380_write(register, value) - write to the specific register * * NCR5380_implementation_fields - additional fields needed for this - * specific implementation of the NCR5380 + * specific implementation of the NCR5380 * * Either real DMA *or* pseudo DMA may be implemented * REAL functions : * NCR5380_REAL_DMA should be defined if real DMA is to be used. * Note that the DMA setup functions should return the number of bytes - * that they were able to program the controller for. + * that they were able to program the controller for. * * Also note that generic i386/PC versions of these macros are - * available as NCR5380_i386_dma_write_setup, - * NCR5380_i386_dma_read_setup, and NCR5380_i386_dma_residual. + * available as NCR5380_i386_dma_write_setup, + * NCR5380_i386_dma_read_setup, and NCR5380_i386_dma_residual. * * NCR5380_dma_write_setup(instance, src, count) - initialize * NCR5380_dma_read_setup(instance, dst, count) - initialize @@ -221,18 +135,8 @@ * possible) function may be used. */ -/* Macros ease life... :-) */ -#define SETUP_HOSTDATA(in) \ - struct NCR5380_hostdata *hostdata = \ - (struct NCR5380_hostdata *)(in)->hostdata -#define HOSTDATA(in) ((struct NCR5380_hostdata *)(in)->hostdata) - -#define NEXT(cmd) ((struct scsi_cmnd *)(cmd)->host_scribble) -#define SET_NEXT(cmd,next) ((cmd)->host_scribble = (void *)(next)) -#define NEXTADDR(cmd) ((struct scsi_cmnd **)&(cmd)->host_scribble) - -#define HOSTNO instance->host_no -#define H_NO(cmd) (cmd)->device->host->host_no +static int do_abort(struct Scsi_Host *); +static void do_reset(struct Scsi_Host *); #ifdef SUPPORT_TAGS @@ -251,9 +155,7 @@ * cannot know it in advance :-( We just see a QUEUE_FULL status being * returned. So, in this case, the driver internal queue size assumption is * reduced to the number of active tags if QUEUE_FULL is returned by the - * target. The command is returned to the mid-level, but with status changed - * to BUSY, since --as I've seen-- the mid-level can't handle QUEUE_FULL - * correctly. + * target. * * We're also not allowed running tagged commands as long as an untagged * command is active. And REQUEST SENSE commands after a contingent allegiance @@ -304,7 +206,8 @@ static void __init init_tags(struct NCR5380_hostdata *hostdata) static int is_lun_busy(struct scsi_cmnd *cmd, int should_be_tagged) { u8 lun = cmd->device->lun; - SETUP_HOSTDATA(cmd->device->host); + struct Scsi_Host *instance = cmd->device->host; + struct NCR5380_hostdata *hostdata = shost_priv(instance); if (hostdata->busy[cmd->device->id] & (1 << lun)) return 1; @@ -314,8 +217,8 @@ static int is_lun_busy(struct scsi_cmnd *cmd, int should_be_tagged) return 0; if (hostdata->TagAlloc[scmd_id(cmd)][lun].nr_allocated >= hostdata->TagAlloc[scmd_id(cmd)][lun].queue_size) { - dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d: no free tags\n", - H_NO(cmd), cmd->device->id, lun); + dsprintk(NDEBUG_TAGS, instance, "target %d lun %d: no free tags\n", + scmd_id(cmd), lun); return 1; } return 0; @@ -330,7 +233,8 @@ static int is_lun_busy(struct scsi_cmnd *cmd, int should_be_tagged) static void cmd_get_tag(struct scsi_cmnd *cmd, int should_be_tagged) { u8 lun = cmd->device->lun; - SETUP_HOSTDATA(cmd->device->host); + struct Scsi_Host *instance = cmd->device->host; + struct NCR5380_hostdata *hostdata = shost_priv(instance); /* If we or the target don't support tagged queuing, allocate the LUN for * an untagged command. @@ -340,18 +244,16 @@ static void cmd_get_tag(struct scsi_cmnd *cmd, int should_be_tagged) !cmd->device->tagged_supported) { cmd->tag = TAG_NONE; hostdata->busy[cmd->device->id] |= (1 << lun); - dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d now allocated by untagged " - "command\n", H_NO(cmd), cmd->device->id, lun); + dsprintk(NDEBUG_TAGS, instance, "target %d lun %d now allocated by untagged command\n", + scmd_id(cmd), lun); } else { struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun]; cmd->tag = find_first_zero_bit(ta->allocated, MAX_TAGS); set_bit(cmd->tag, ta->allocated); ta->nr_allocated++; - dprintk(NDEBUG_TAGS, "scsi%d: using tag %d for target %d lun %d " - "(now %d tags in use)\n", - H_NO(cmd), cmd->tag, cmd->device->id, - lun, ta->nr_allocated); + dsprintk(NDEBUG_TAGS, instance, "using tag %d for target %d lun %d (%d tags allocated)\n", + cmd->tag, scmd_id(cmd), lun, ta->nr_allocated); } } @@ -363,21 +265,22 @@ static void cmd_get_tag(struct scsi_cmnd *cmd, int should_be_tagged) static void cmd_free_tag(struct scsi_cmnd *cmd) { u8 lun = cmd->device->lun; - SETUP_HOSTDATA(cmd->device->host); + struct Scsi_Host *instance = cmd->device->host; + struct NCR5380_hostdata *hostdata = shost_priv(instance); if (cmd->tag == TAG_NONE) { hostdata->busy[cmd->device->id] &= ~(1 << lun); - dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %d untagged cmd finished\n", - H_NO(cmd), cmd->device->id, lun); + dsprintk(NDEBUG_TAGS, instance, "target %d lun %d untagged cmd freed\n", + scmd_id(cmd), lun); } else if (cmd->tag >= MAX_TAGS) { - printk(KERN_NOTICE "scsi%d: trying to free bad tag %d!\n", - H_NO(cmd), cmd->tag); + shost_printk(KERN_NOTICE, instance, + "trying to free bad tag %d!\n", cmd->tag); } else { struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun]; clear_bit(cmd->tag, ta->allocated); ta->nr_allocated--; - dprintk(NDEBUG_TAGS, "scsi%d: freed tag %d for target %d lun %d\n", - H_NO(cmd), cmd->tag, cmd->device->id, lun); + dsprintk(NDEBUG_TAGS, instance, "freed tag %d for target %d lun %d\n", + cmd->tag, scmd_id(cmd), lun); } } @@ -401,17 +304,15 @@ static void free_all_tags(struct NCR5380_hostdata *hostdata) #endif /* SUPPORT_TAGS */ - -/* - * Function: void merge_contiguous_buffers( struct scsi_cmnd *cmd ) - * - * Purpose: Try to merge several scatter-gather requests into one DMA - * transfer. This is possible if the scatter buffers lie on - * physical contiguous addresses. - * - * Parameters: struct scsi_cmnd *cmd - * The command to work on. The first scatter buffer's data are - * assumed to be already transferred into ptr/this_residual. +/** + * merge_contiguous_buffers - coalesce scatter-gather list entries + * @cmd: command requesting IO + * + * Try to merge several scatter-gather buffers into one DMA transfer. + * This is possible if the scatter buffers lie on physically + * contiguous addresses. The first scatter-gather buffer's data are + * assumed to be already transferred into cmd->SCp.this_residual. + * Every buffer merged avoids an interrupt and a DMA setup operation. */ static void merge_contiguous_buffers(struct scsi_cmnd *cmd) @@ -463,9 +364,7 @@ static inline void initialize_SCp(struct scsi_cmnd *cmd) cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1; cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); cmd->SCp.this_residual = cmd->SCp.buffer->length; - /* ++roman: Try to merge some scatter-buffers if they are at - * contiguous physical addresses. - */ + merge_contiguous_buffers(cmd); } else { cmd->SCp.buffer = NULL; @@ -473,31 +372,110 @@ static inline void initialize_SCp(struct scsi_cmnd *cmd) cmd->SCp.ptr = NULL; cmd->SCp.this_residual = 0; } + + cmd->SCp.Status = 0; + cmd->SCp.Message = 0; +} + +/** + * NCR5380_poll_politely2 - wait for two chip register values + * @instance: controller to poll + * @reg1: 5380 register to poll + * @bit1: Bitmask to check + * @val1: Expected value + * @reg2: Second 5380 register to poll + * @bit2: Second bitmask to check + * @val2: Second expected value + * @wait: Time-out in jiffies + * + * Polls the chip in a reasonably efficient manner waiting for an + * event to occur. After a short quick poll we begin to yield the CPU + * (if possible). In irq contexts the time-out is arbitrarily limited. + * Callers may hold locks as long as they are held in irq mode. + * + * Returns 0 if either or both event(s) occurred otherwise -ETIMEDOUT. + */ + +static int NCR5380_poll_politely2(struct Scsi_Host *instance, + int reg1, int bit1, int val1, + int reg2, int bit2, int val2, int wait) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + unsigned long deadline = jiffies + wait; + unsigned long n; + + /* Busy-wait for up to 10 ms */ + n = min(10000U, jiffies_to_usecs(wait)); + n *= hostdata->accesses_per_ms; + n /= 2000; + do { + if ((NCR5380_read(reg1) & bit1) == val1) + return 0; + if ((NCR5380_read(reg2) & bit2) == val2) + return 0; + cpu_relax(); + } while (n--); + + if (irqs_disabled() || in_interrupt()) + return -ETIMEDOUT; + + /* Repeatedly sleep for 1 ms until deadline */ + while (time_is_after_jiffies(deadline)) { + schedule_timeout_uninterruptible(1); + if ((NCR5380_read(reg1) & bit1) == val1) + return 0; + if ((NCR5380_read(reg2) & bit2) == val2) + return 0; + } + + return -ETIMEDOUT; } -#include <linux/delay.h> +static inline int NCR5380_poll_politely(struct Scsi_Host *instance, + int reg, int bit, int val, int wait) +{ + return NCR5380_poll_politely2(instance, reg, bit, val, + reg, bit, val, wait); +} #if NDEBUG static struct { unsigned char mask; const char *name; } signals[] = { - { SR_DBP, "PARITY"}, { SR_RST, "RST" }, { SR_BSY, "BSY" }, - { SR_REQ, "REQ" }, { SR_MSG, "MSG" }, { SR_CD, "CD" }, { SR_IO, "IO" }, - { SR_SEL, "SEL" }, {0, NULL} -}, basrs[] = { - {BASR_ATN, "ATN"}, {BASR_ACK, "ACK"}, {0, NULL} -}, icrs[] = { - {ICR_ASSERT_RST, "ASSERT RST"},{ICR_ASSERT_ACK, "ASSERT ACK"}, - {ICR_ASSERT_BSY, "ASSERT BSY"}, {ICR_ASSERT_SEL, "ASSERT SEL"}, - {ICR_ASSERT_ATN, "ASSERT ATN"}, {ICR_ASSERT_DATA, "ASSERT DATA"}, + {SR_DBP, "PARITY"}, + {SR_RST, "RST"}, + {SR_BSY, "BSY"}, + {SR_REQ, "REQ"}, + {SR_MSG, "MSG"}, + {SR_CD, "CD"}, + {SR_IO, "IO"}, + {SR_SEL, "SEL"}, + {0, NULL} +}, +basrs[] = { + {BASR_ATN, "ATN"}, + {BASR_ACK, "ACK"}, {0, NULL} -}, mrs[] = { - {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"}, {MR_TARGET, "MODE TARGET"}, - {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"}, {MR_ENABLE_PAR_INTR, - "MODE PARITY INTR"}, {MR_ENABLE_EOP_INTR,"MODE EOP INTR"}, +}, +icrs[] = { + {ICR_ASSERT_RST, "ASSERT RST"}, + {ICR_ASSERT_ACK, "ASSERT ACK"}, + {ICR_ASSERT_BSY, "ASSERT BSY"}, + {ICR_ASSERT_SEL, "ASSERT SEL"}, + {ICR_ASSERT_ATN, "ASSERT ATN"}, + {ICR_ASSERT_DATA, "ASSERT DATA"}, + {0, NULL} +}, +mrs[] = { + {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"}, + {MR_TARGET, "MODE TARGET"}, + {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"}, + {MR_ENABLE_PAR_INTR, "MODE PARITY INTR"}, + {MR_ENABLE_EOP_INTR, "MODE EOP INTR"}, {MR_MONITOR_BSY, "MODE MONITOR BSY"}, - {MR_DMA_MODE, "MODE DMA"}, {MR_ARBITRATE, "MODE ARBITRATION"}, + {MR_DMA_MODE, "MODE DMA"}, + {MR_ARBITRATE, "MODE ARBITRATION"}, {0, NULL} }; @@ -511,15 +489,13 @@ static struct { static void NCR5380_print(struct Scsi_Host *instance) { unsigned char status, data, basr, mr, icr, i; - unsigned long flags; - local_irq_save(flags); data = NCR5380_read(CURRENT_SCSI_DATA_REG); status = NCR5380_read(STATUS_REG); mr = NCR5380_read(MODE_REG); icr = NCR5380_read(INITIATOR_COMMAND_REG); basr = NCR5380_read(BUS_AND_STATUS_REG); - local_irq_restore(flags); + printk("STATUS_REG: %02x ", status); for (i = 0; signals[i].mask; ++i) if (status & signals[i].mask) @@ -543,8 +519,12 @@ static struct { unsigned char value; const char *name; } phases[] = { - {PHASE_DATAOUT, "DATAOUT"}, {PHASE_DATAIN, "DATAIN"}, {PHASE_CMDOUT, "CMDOUT"}, - {PHASE_STATIN, "STATIN"}, {PHASE_MSGOUT, "MSGOUT"}, {PHASE_MSGIN, "MSGIN"}, + {PHASE_DATAOUT, "DATAOUT"}, + {PHASE_DATAIN, "DATAIN"}, + {PHASE_CMDOUT, "CMDOUT"}, + {PHASE_STATIN, "STATIN"}, + {PHASE_MSGOUT, "MSGOUT"}, + {PHASE_MSGIN, "MSGIN"}, {PHASE_UNKNOWN, "UNKNOWN"} }; @@ -553,8 +533,6 @@ static struct { * @instance: adapter to dump * * Print the current SCSI phase for debugging purposes - * - * Locks: none */ static void NCR5380_print_phase(struct Scsi_Host *instance) @@ -564,54 +542,21 @@ static void NCR5380_print_phase(struct Scsi_Host *instance) status = NCR5380_read(STATUS_REG); if (!(status & SR_REQ)) - printk(KERN_DEBUG "scsi%d: REQ not asserted, phase unknown.\n", HOSTNO); + shost_printk(KERN_DEBUG, instance, "REQ not asserted, phase unknown.\n"); else { for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i) ; - printk(KERN_DEBUG "scsi%d: phase %s\n", HOSTNO, phases[i].name); + shost_printk(KERN_DEBUG, instance, "phase %s\n", phases[i].name); } } - #endif -/* - * ++roman: New scheme of calling NCR5380_main() - * - * If we're not in an interrupt, we can call our main directly, it cannot be - * already running. Else, we queue it on a task queue, if not 'main_running' - * tells us that a lower level is already executing it. This way, - * 'main_running' needs not be protected in a special way. - * - * queue_main() is a utility function for putting our main onto the task - * queue, if main_running is false. It should be called only from a - * interrupt or bottom half. - */ - -#include <linux/gfp.h> -#include <linux/workqueue.h> -#include <linux/interrupt.h> - -static inline void queue_main(struct NCR5380_hostdata *hostdata) -{ - if (!hostdata->main_running) { - /* If in interrupt and NCR5380_main() not already running, - queue it on the 'immediate' task queue, to be processed - immediately after the current interrupt processing has - finished. */ - schedule_work(&hostdata->main_task); - } - /* else: nothing to do: the running NCR5380_main() will pick up - any newly queued command. */ -} - /** * NCR58380_info - report driver and host information * @instance: relevant scsi host instance * * For use as the host template info() handler. - * - * Locks: none */ static const char *NCR5380_info(struct Scsi_Host *instance) @@ -630,13 +575,14 @@ static void prepare_info(struct Scsi_Host *instance) "base 0x%lx, irq %d, " "can_queue %d, cmd_per_lun %d, " "sg_tablesize %d, this_id %d, " - "flags { %s}, " + "flags { %s%s}, " "options { %s} ", instance->hostt->name, instance->io_port, instance->n_io_port, instance->base, instance->irq, instance->can_queue, instance->cmd_per_lun, instance->sg_tablesize, instance->this_id, hostdata->flags & FLAG_TAGGED_QUEUING ? "TAGGED_QUEUING " : "", + hostdata->flags & FLAG_TOSHIBA_DELAY ? "TOSHIBA_DELAY " : "", #ifdef DIFFERENTIAL "DIFFERENTIAL " #endif @@ -653,102 +599,6 @@ static void prepare_info(struct Scsi_Host *instance) } /** - * NCR5380_print_status - dump controller info - * @instance: controller to dump - * - * Print commands in the various queues, called from NCR5380_abort - * to aid debugging. - */ - -static void lprint_Scsi_Cmnd(struct scsi_cmnd *cmd) -{ - int i, s; - unsigned char *command; - printk("scsi%d: destination target %d, lun %llu\n", - H_NO(cmd), cmd->device->id, cmd->device->lun); - printk(KERN_CONT " command = "); - command = cmd->cmnd; - printk(KERN_CONT "%2d (0x%02x)", command[0], command[0]); - for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i) - printk(KERN_CONT " %02x", command[i]); - printk("\n"); -} - -static void NCR5380_print_status(struct Scsi_Host *instance) -{ - struct NCR5380_hostdata *hostdata; - struct scsi_cmnd *ptr; - unsigned long flags; - - NCR5380_dprint(NDEBUG_ANY, instance); - NCR5380_dprint_phase(NDEBUG_ANY, instance); - - hostdata = (struct NCR5380_hostdata *)instance->hostdata; - - local_irq_save(flags); - printk("NCR5380: coroutine is%s running.\n", - hostdata->main_running ? "" : "n't"); - if (!hostdata->connected) - printk("scsi%d: no currently connected command\n", HOSTNO); - else - lprint_Scsi_Cmnd((struct scsi_cmnd *) hostdata->connected); - printk("scsi%d: issue_queue\n", HOSTNO); - for (ptr = (struct scsi_cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr)) - lprint_Scsi_Cmnd(ptr); - - printk("scsi%d: disconnected_queue\n", HOSTNO); - for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr; - ptr = NEXT(ptr)) - lprint_Scsi_Cmnd(ptr); - - local_irq_restore(flags); - printk("\n"); -} - -static void show_Scsi_Cmnd(struct scsi_cmnd *cmd, struct seq_file *m) -{ - int i, s; - unsigned char *command; - seq_printf(m, "scsi%d: destination target %d, lun %llu\n", - H_NO(cmd), cmd->device->id, cmd->device->lun); - seq_puts(m, " command = "); - command = cmd->cmnd; - seq_printf(m, "%2d (0x%02x)", command[0], command[0]); - for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i) - seq_printf(m, " %02x", command[i]); - seq_putc(m, '\n'); -} - -static int __maybe_unused NCR5380_show_info(struct seq_file *m, - struct Scsi_Host *instance) -{ - struct NCR5380_hostdata *hostdata; - struct scsi_cmnd *ptr; - unsigned long flags; - - hostdata = (struct NCR5380_hostdata *)instance->hostdata; - - local_irq_save(flags); - seq_printf(m, "NCR5380: coroutine is%s running.\n", - hostdata->main_running ? "" : "n't"); - if (!hostdata->connected) - seq_printf(m, "scsi%d: no currently connected command\n", HOSTNO); - else - show_Scsi_Cmnd((struct scsi_cmnd *) hostdata->connected, m); - seq_printf(m, "scsi%d: issue_queue\n", HOSTNO); - for (ptr = (struct scsi_cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr)) - show_Scsi_Cmnd(ptr, m); - - seq_printf(m, "scsi%d: disconnected_queue\n", HOSTNO); - for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr; - ptr = NEXT(ptr)) - show_Scsi_Cmnd(ptr, m); - - local_irq_restore(flags); - return 0; -} - -/** * NCR5380_init - initialise an NCR5380 * @instance: adapter to configure * @flags: control flags @@ -764,11 +614,11 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m, static int __init NCR5380_init(struct Scsi_Host *instance, int flags) { + struct NCR5380_hostdata *hostdata = shost_priv(instance); int i; - SETUP_HOSTDATA(instance); + unsigned long deadline; hostdata->host = instance; - hostdata->aborted = 0; hostdata->id_mask = 1 << instance->this_id; hostdata->id_higher_mask = 0; for (i = hostdata->id_mask; i <= 0x80; i <<= 1) @@ -782,13 +632,21 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags) #if defined (REAL_DMA) hostdata->dma_len = 0; #endif - hostdata->targets_present = 0; + spin_lock_init(&hostdata->lock); hostdata->connected = NULL; - hostdata->issue_queue = NULL; - hostdata->disconnected_queue = NULL; + hostdata->sensing = NULL; + INIT_LIST_HEAD(&hostdata->autosense); + INIT_LIST_HEAD(&hostdata->unissued); + INIT_LIST_HEAD(&hostdata->disconnected); + hostdata->flags = flags; INIT_WORK(&hostdata->main_task, NCR5380_main); + hostdata->work_q = alloc_workqueue("ncr5380_%d", + WQ_UNBOUND | WQ_MEM_RECLAIM, + 1, instance->host_no); + if (!hostdata->work_q) + return -ENOMEM; prepare_info(instance); @@ -797,6 +655,72 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags) NCR5380_write(TARGET_COMMAND_REG, 0); NCR5380_write(SELECT_ENABLE_REG, 0); + /* Calibrate register polling loop */ + i = 0; + deadline = jiffies + 1; + do { + cpu_relax(); + } while (time_is_after_jiffies(deadline)); + deadline += msecs_to_jiffies(256); + do { + NCR5380_read(STATUS_REG); + ++i; + cpu_relax(); + } while (time_is_after_jiffies(deadline)); + hostdata->accesses_per_ms = i / 256; + + return 0; +} + +/** + * NCR5380_maybe_reset_bus - Detect and correct bus wedge problems. + * @instance: adapter to check + * + * If the system crashed, it may have crashed with a connected target and + * the SCSI bus busy. Check for BUS FREE phase. If not, try to abort the + * currently established nexus, which we know nothing about. Failing that + * do a bus reset. + * + * Note that a bus reset will cause the chip to assert IRQ. + * + * Returns 0 if successful, otherwise -ENXIO. + */ + +static int NCR5380_maybe_reset_bus(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + int pass; + + for (pass = 1; (NCR5380_read(STATUS_REG) & SR_BSY) && pass <= 6; ++pass) { + switch (pass) { + case 1: + case 3: + case 5: + shost_printk(KERN_ERR, instance, "SCSI bus busy, waiting up to five seconds\n"); + NCR5380_poll_politely(instance, + STATUS_REG, SR_BSY, 0, 5 * HZ); + break; + case 2: + shost_printk(KERN_ERR, instance, "bus busy, attempting abort\n"); + do_abort(instance); + break; + case 4: + shost_printk(KERN_ERR, instance, "bus busy, attempting reset\n"); + do_reset(instance); + /* Wait after a reset; the SCSI standard calls for + * 250ms, we wait 500ms to be on the safe side. + * But some Toshiba CD-ROMs need ten times that. + */ + if (hostdata->flags & FLAG_TOSHIBA_DELAY) + msleep(2500); + else + msleep(500); + break; + case 6: + shost_printk(KERN_ERR, instance, "bus locked solid\n"); + return -ENXIO; + } + } return 0; } @@ -812,6 +736,38 @@ static void NCR5380_exit(struct Scsi_Host *instance) struct NCR5380_hostdata *hostdata = shost_priv(instance); cancel_work_sync(&hostdata->main_task); + destroy_workqueue(hostdata->work_q); +} + +/** + * complete_cmd - finish processing a command and return it to the SCSI ML + * @instance: the host instance + * @cmd: command to complete + */ + +static void complete_cmd(struct Scsi_Host *instance, + struct scsi_cmnd *cmd) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + + dsprintk(NDEBUG_QUEUES, instance, "complete_cmd: cmd %p\n", cmd); + + if (hostdata->sensing == cmd) { + /* Autosense processing ends here */ + if ((cmd->result & 0xff) != SAM_STAT_GOOD) { + scsi_eh_restore_cmnd(cmd, &hostdata->ses); + set_host_byte(cmd, DID_ERROR); + } else + scsi_eh_restore_cmnd(cmd, &hostdata->ses); + hostdata->sensing = NULL; + } + +#ifdef SUPPORT_TAGS + cmd_free_tag(cmd); +#else + hostdata->busy[scmd_id(cmd)] &= ~(1 << cmd->device->lun); +#endif + cmd->scsi_done(cmd); } /** @@ -819,7 +775,7 @@ static void NCR5380_exit(struct Scsi_Host *instance) * @instance: the relevant SCSI adapter * @cmd: SCSI command * - * cmd is added to the per instance issue_queue, with minor + * cmd is added to the per-instance issue queue, with minor * twiddling done to the host specific fields of cmd. If the * main coroutine is not running, it is restarted. */ @@ -828,44 +784,23 @@ static int NCR5380_queue_command(struct Scsi_Host *instance, struct scsi_cmnd *cmd) { struct NCR5380_hostdata *hostdata = shost_priv(instance); - struct scsi_cmnd *tmp; + struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); unsigned long flags; #if (NDEBUG & NDEBUG_NO_WRITE) switch (cmd->cmnd[0]) { case WRITE_6: case WRITE_10: - printk(KERN_NOTICE "scsi%d: WRITE attempted with NO_WRITE debugging flag set\n", - H_NO(cmd)); + shost_printk(KERN_DEBUG, instance, "WRITE attempted with NDEBUG_NO_WRITE set\n"); cmd->result = (DID_ERROR << 16); cmd->scsi_done(cmd); return 0; } #endif /* (NDEBUG & NDEBUG_NO_WRITE) */ - /* - * We use the host_scribble field as a pointer to the next command - * in a queue - */ - - SET_NEXT(cmd, NULL); cmd->result = 0; /* - * Insert the cmd into the issue queue. Note that REQUEST SENSE - * commands are added to the head of the queue since any command will - * clear the contingent allegiance condition that exists and the - * sense data is only guaranteed to be valid while the condition exists. - */ - - /* ++guenther: now that the issue queue is being set up, we can lock ST-DMA. - * Otherwise a running NCR5380_main may steal the lock. - * Lock before actually inserting due to fairness reasons explained in - * atari_scsi.c. If we insert first, then it's impossible for this driver - * to release the lock. - * Stop timer for this command while waiting for the lock, or timeouts - * may happen (and they really do), and it's no good if the command doesn't - * appear in any of the queues. * ++roman: Just disabling the NCR interrupt isn't sufficient here, * because also a timer int can trigger an abort or reset, which would * alter queues and touch the lock. @@ -873,7 +808,7 @@ static int NCR5380_queue_command(struct Scsi_Host *instance, if (!NCR5380_acquire_dma_irq(instance)) return SCSI_MLQUEUE_HOST_BUSY; - local_irq_save(flags); + spin_lock_irqsave(&hostdata->lock, flags); /* * Insert the cmd into the issue queue. Note that REQUEST SENSE @@ -882,33 +817,18 @@ static int NCR5380_queue_command(struct Scsi_Host *instance, * sense data is only guaranteed to be valid while the condition exists. */ - if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) { - LIST(cmd, hostdata->issue_queue); - SET_NEXT(cmd, hostdata->issue_queue); - hostdata->issue_queue = cmd; - } else { - for (tmp = (struct scsi_cmnd *)hostdata->issue_queue; - NEXT(tmp); tmp = NEXT(tmp)) - ; - LIST(cmd, tmp); - SET_NEXT(tmp, cmd); - } - local_irq_restore(flags); + if (cmd->cmnd[0] == REQUEST_SENSE) + list_add(&ncmd->list, &hostdata->unissued); + else + list_add_tail(&ncmd->list, &hostdata->unissued); - dprintk(NDEBUG_QUEUES, "scsi%d: command added to %s of queue\n", H_NO(cmd), - (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail"); + spin_unlock_irqrestore(&hostdata->lock, flags); - /* If queue_command() is called from an interrupt (real one or bottom - * half), we let queue_main() do the job of taking care about main. If it - * is already running, this is a no-op, else main will be queued. - * - * If we're not in an interrupt, we can call NCR5380_main() - * unconditionally, because it cannot be already running. - */ - if (in_interrupt() || irqs_disabled()) - queue_main(hostdata); - else - NCR5380_main(&hostdata->main_task); + dsprintk(NDEBUG_QUEUES, instance, "command %p added to %s of queue\n", + cmd, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail"); + + /* Kick off command processing */ + queue_work(hostdata->work_q, &hostdata->main_task); return 0; } @@ -917,22 +837,85 @@ static inline void maybe_release_dma_irq(struct Scsi_Host *instance) struct NCR5380_hostdata *hostdata = shost_priv(instance); /* Caller does the locking needed to set & test these data atomically */ - if (!hostdata->disconnected_queue && - !hostdata->issue_queue && + if (list_empty(&hostdata->disconnected) && + list_empty(&hostdata->unissued) && + list_empty(&hostdata->autosense) && !hostdata->connected && - !hostdata->retain_dma_intr) + !hostdata->selecting) NCR5380_release_dma_irq(instance); } /** + * dequeue_next_cmd - dequeue a command for processing + * @instance: the scsi host instance + * + * Priority is given to commands on the autosense queue. These commands + * need autosense because of a CHECK CONDITION result. + * + * Returns a command pointer if a command is found for a target that is + * not already busy. Otherwise returns NULL. + */ + +static struct scsi_cmnd *dequeue_next_cmd(struct Scsi_Host *instance) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + struct NCR5380_cmd *ncmd; + struct scsi_cmnd *cmd; + + if (list_empty(&hostdata->autosense)) { + list_for_each_entry(ncmd, &hostdata->unissued, list) { + cmd = NCR5380_to_scmd(ncmd); + dsprintk(NDEBUG_QUEUES, instance, "dequeue: cmd=%p target=%d busy=0x%02x lun=%llu\n", + cmd, scmd_id(cmd), hostdata->busy[scmd_id(cmd)], cmd->device->lun); + + if ( +#ifdef SUPPORT_TAGS + !is_lun_busy(cmd, 1) +#else + !(hostdata->busy[scmd_id(cmd)] & (1 << cmd->device->lun)) +#endif + ) { + list_del(&ncmd->list); + dsprintk(NDEBUG_QUEUES, instance, + "dequeue: removed %p from issue queue\n", cmd); + return cmd; + } + } + } else { + /* Autosense processing begins here */ + ncmd = list_first_entry(&hostdata->autosense, + struct NCR5380_cmd, list); + list_del(&ncmd->list); + cmd = NCR5380_to_scmd(ncmd); + dsprintk(NDEBUG_QUEUES, instance, + "dequeue: removed %p from autosense queue\n", cmd); + scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0); + hostdata->sensing = cmd; + return cmd; + } + return NULL; +} + +static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); + + if (hostdata->sensing) { + scsi_eh_restore_cmnd(cmd, &hostdata->ses); + list_add(&ncmd->list, &hostdata->autosense); + hostdata->sensing = NULL; + } else + list_add(&ncmd->list, &hostdata->unissued); +} + +/** * NCR5380_main - NCR state machines * * NCR5380_main is a coroutine that runs as long as more work can * be done on the NCR5380 host adapters in a system. Both * NCR5380_queue_command() and NCR5380_intr() will try to start it * in case it is not running. - * - * Locks: called as its own thread with no locks held. */ static void NCR5380_main(struct work_struct *work) @@ -940,154 +923,69 @@ static void NCR5380_main(struct work_struct *work) struct NCR5380_hostdata *hostdata = container_of(work, struct NCR5380_hostdata, main_task); struct Scsi_Host *instance = hostdata->host; - struct scsi_cmnd *tmp, *prev; + struct scsi_cmnd *cmd; int done; - unsigned long flags; /* - * We run (with interrupts disabled) until we're sure that none of - * the host adapters have anything that can be done, at which point - * we set main_running to 0 and exit. - * - * Interrupts are enabled before doing various other internal - * instructions, after we've decided that we need to run through - * the loop again. - * - * this should prevent any race conditions. - * * ++roman: Just disabling the NCR interrupt isn't sufficient here, * because also a timer int can trigger an abort or reset, which can * alter queues and touch the Falcon lock. */ - /* Tell int handlers main() is now already executing. Note that - no races are possible here. If an int comes in before - 'main_running' is set here, and queues/executes main via the - task queue, it doesn't do any harm, just this instance of main - won't find any work left to do. */ - if (hostdata->main_running) - return; - hostdata->main_running = 1; - - local_save_flags(flags); do { - local_irq_disable(); /* Freeze request queues */ done = 1; - if (!hostdata->connected) { - dprintk(NDEBUG_MAIN, "scsi%d: not connected\n", HOSTNO); - /* - * Search through the issue_queue for a command destined - * for a target that's not busy. - */ -#if (NDEBUG & NDEBUG_LISTS) - for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, prev = NULL; - tmp && (tmp != prev); prev = tmp, tmp = NEXT(tmp)) - ; - /*printk("%p ", tmp);*/ - if ((tmp == prev) && tmp) - printk(" LOOP\n"); - /* else printk("\n"); */ -#endif - for (tmp = (struct scsi_cmnd *) hostdata->issue_queue, - prev = NULL; tmp; prev = tmp, tmp = NEXT(tmp)) { - u8 lun = tmp->device->lun; - - dprintk(NDEBUG_LISTS, - "MAIN tmp=%p target=%d busy=%d lun=%d\n", - tmp, scmd_id(tmp), hostdata->busy[scmd_id(tmp)], - lun); - /* When we find one, remove it from the issue queue. */ - /* ++guenther: possible race with Falcon locking */ - if ( -#ifdef SUPPORT_TAGS - !is_lun_busy( tmp, tmp->cmnd[0] != REQUEST_SENSE) -#else - !(hostdata->busy[tmp->device->id] & (1 << lun)) -#endif - ) { - /* ++guenther: just to be sure, this must be atomic */ - local_irq_disable(); - if (prev) { - REMOVE(prev, NEXT(prev), tmp, NEXT(tmp)); - SET_NEXT(prev, NEXT(tmp)); - } else { - REMOVE(-1, hostdata->issue_queue, tmp, NEXT(tmp)); - hostdata->issue_queue = NEXT(tmp); - } - SET_NEXT(tmp, NULL); - hostdata->retain_dma_intr++; + spin_lock_irq(&hostdata->lock); + while (!hostdata->connected && + (cmd = dequeue_next_cmd(instance))) { - /* reenable interrupts after finding one */ - local_irq_restore(flags); + dsprintk(NDEBUG_MAIN, instance, "main: dequeued %p\n", cmd); - /* - * Attempt to establish an I_T_L nexus here. - * On success, instance->hostdata->connected is set. - * On failure, we must add the command back to the - * issue queue so we can keep trying. - */ - dprintk(NDEBUG_MAIN, "scsi%d: main(): command for target %d " - "lun %d removed from issue_queue\n", - HOSTNO, tmp->device->id, lun); - /* - * REQUEST SENSE commands are issued without tagged - * queueing, even on SCSI-II devices because the - * contingent allegiance condition exists for the - * entire unit. - */ - /* ++roman: ...and the standard also requires that - * REQUEST SENSE command are untagged. - */ + /* + * Attempt to establish an I_T_L nexus here. + * On success, instance->hostdata->connected is set. + * On failure, we must add the command back to the + * issue queue so we can keep trying. + */ + /* + * REQUEST SENSE commands are issued without tagged + * queueing, even on SCSI-II devices because the + * contingent allegiance condition exists for the + * entire unit. + */ + /* ++roman: ...and the standard also requires that + * REQUEST SENSE command are untagged. + */ #ifdef SUPPORT_TAGS - cmd_get_tag(tmp, tmp->cmnd[0] != REQUEST_SENSE); + cmd_get_tag(cmd, cmd->cmnd[0] != REQUEST_SENSE); #endif - if (!NCR5380_select(instance, tmp)) { - local_irq_disable(); - hostdata->retain_dma_intr--; - /* release if target did not response! */ - maybe_release_dma_irq(instance); - local_irq_restore(flags); - break; - } else { - local_irq_disable(); - LIST(tmp, hostdata->issue_queue); - SET_NEXT(tmp, hostdata->issue_queue); - hostdata->issue_queue = tmp; + cmd = NCR5380_select(instance, cmd); + if (!cmd) { + dsprintk(NDEBUG_MAIN, instance, "main: select complete\n"); + maybe_release_dma_irq(instance); + } else { + dsprintk(NDEBUG_MAIN | NDEBUG_QUEUES, instance, + "main: select failed, returning %p to queue\n", cmd); + requeue_cmd(instance, cmd); #ifdef SUPPORT_TAGS - cmd_free_tag(tmp); + cmd_free_tag(cmd); #endif - hostdata->retain_dma_intr--; - local_irq_restore(flags); - dprintk(NDEBUG_MAIN, "scsi%d: main(): select() failed, " - "returned to issue_queue\n", HOSTNO); - if (hostdata->connected) - break; - } - } /* if target/lun/target queue is not busy */ - } /* for issue_queue */ - } /* if (!hostdata->connected) */ - + } + } if (hostdata->connected #ifdef REAL_DMA && !hostdata->dma_len #endif ) { - local_irq_restore(flags); - dprintk(NDEBUG_MAIN, "scsi%d: main: performing information transfer\n", - HOSTNO); + dsprintk(NDEBUG_MAIN, instance, "main: performing information transfer\n"); NCR5380_information_transfer(instance); - dprintk(NDEBUG_MAIN, "scsi%d: main: done set false\n", HOSTNO); done = 0; } + spin_unlock_irq(&hostdata->lock); + if (!done) + cond_resched(); } while (!done); - - /* Better allow ints _after_ 'main_running' has been cleared, else - an interrupt could believe we'll pick up the work it left for - us, but we won't see it anymore here... */ - hostdata->main_running = 0; - local_irq_restore(flags); } @@ -1096,27 +994,20 @@ static void NCR5380_main(struct work_struct *work) * Function : void NCR5380_dma_complete (struct Scsi_Host *instance) * * Purpose : Called by interrupt handler when DMA finishes or a phase - * mismatch occurs (which would finish the DMA transfer). + * mismatch occurs (which would finish the DMA transfer). * * Inputs : instance - this instance of the NCR5380. - * */ static void NCR5380_dma_complete(struct Scsi_Host *instance) { - SETUP_HOSTDATA(instance); + struct NCR5380_hostdata *hostdata = shost_priv(instance); int transferred; unsigned char **data; - volatile int *count; + int *count; int saved_data = 0, overrun = 0; unsigned char p; - if (!hostdata->connected) { - printk(KERN_WARNING "scsi%d: received end of DMA interrupt with " - "no connected cmd\n", HOSTNO); - return; - } - if (hostdata->read_overruns) { p = hostdata->connected->SCp.phase; if (p & SR_IO) { @@ -1126,15 +1017,11 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance) (BASR_PHASE_MATCH|BASR_ACK)) { saved_data = NCR5380_read(INPUT_DATA_REG); overrun = 1; - dprintk(NDEBUG_DMA, "scsi%d: read overrun handled\n", HOSTNO); + dsprintk(NDEBUG_DMA, instance, "read overrun handled\n"); } } } - dprintk(NDEBUG_DMA, "scsi%d: real DMA transfer complete, basr 0x%X, sr 0x%X\n", - HOSTNO, NCR5380_read(BUS_AND_STATUS_REG), - NCR5380_read(STATUS_REG)); - #if defined(CONFIG_SUN3) if ((sun3scsi_dma_finish(rq_data_dir(hostdata->connected->request)))) { pr_err("scsi%d: overrun in UDC counter -- not prepared to deal with this!\n", @@ -1153,9 +1040,9 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance) } #endif - (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); NCR5380_write(MODE_REG, MR_BASE); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + NCR5380_read(RESET_PARITY_INTERRUPT_REG); transferred = hostdata->dma_len - NCR5380_dma_residual(instance); hostdata->dma_len = 0; @@ -1194,140 +1081,160 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance) * Handle interrupts, reestablishing I_T_L or I_T_L_Q nexuses * from the disconnected queue, and restarting NCR5380_main() * as required. + * + * The chip can assert IRQ in any of six different conditions. The IRQ flag + * is then cleared by reading the Reset Parity/Interrupt Register (RPIR). + * Three of these six conditions are latched in the Bus and Status Register: + * - End of DMA (cleared by ending DMA Mode) + * - Parity error (cleared by reading RPIR) + * - Loss of BSY (cleared by reading RPIR) + * Two conditions have flag bits that are not latched: + * - Bus phase mismatch (non-maskable in DMA Mode, cleared by ending DMA Mode) + * - Bus reset (non-maskable) + * The remaining condition has no flag bit at all: + * - Selection/reselection + * + * Hence, establishing the cause(s) of any interrupt is partly guesswork. + * In "The DP8490 and DP5380 Comparison Guide", National Semiconductor + * claimed that "the design of the [DP8490] interrupt logic ensures + * interrupts will not be lost (they can be on the DP5380)." + * The L5380/53C80 datasheet from LOGIC Devices has more details. + * + * Checking for bus reset by reading RST is futile because of interrupt + * latency, but a bus reset will reset chip logic. Checking for parity error + * is unnecessary because that interrupt is never enabled. A Loss of BSY + * condition will clear DMA Mode. We can tell when this occurs because the + * the Busy Monitor interrupt is enabled together with DMA Mode. */ static irqreturn_t NCR5380_intr(int irq, void *dev_id) { struct Scsi_Host *instance = dev_id; - int done = 1, handled = 0; + struct NCR5380_hostdata *hostdata = shost_priv(instance); + int handled = 0; unsigned char basr; + unsigned long flags; - dprintk(NDEBUG_INTR, "scsi%d: NCR5380 irq triggered\n", HOSTNO); + spin_lock_irqsave(&hostdata->lock, flags); - /* Look for pending interrupts */ basr = NCR5380_read(BUS_AND_STATUS_REG); - dprintk(NDEBUG_INTR, "scsi%d: BASR=%02x\n", HOSTNO, basr); - /* dispatch to appropriate routine if found and done=0 */ if (basr & BASR_IRQ) { - NCR5380_dprint(NDEBUG_INTR, instance); - if ((NCR5380_read(STATUS_REG) & (SR_SEL|SR_IO)) == (SR_SEL|SR_IO)) { - done = 0; - dprintk(NDEBUG_INTR, "scsi%d: SEL interrupt\n", HOSTNO); - NCR5380_reselect(instance); - (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); - } else if (basr & BASR_PARITY_ERROR) { - dprintk(NDEBUG_INTR, "scsi%d: PARITY interrupt\n", HOSTNO); - (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); - } else if ((NCR5380_read(STATUS_REG) & SR_RST) == SR_RST) { - dprintk(NDEBUG_INTR, "scsi%d: RESET interrupt\n", HOSTNO); - (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); - } else { - /* - * The rest of the interrupt conditions can occur only during a - * DMA transfer - */ + unsigned char mr = NCR5380_read(MODE_REG); + unsigned char sr = NCR5380_read(STATUS_REG); + + dsprintk(NDEBUG_INTR, instance, "IRQ %d, BASR 0x%02x, SR 0x%02x, MR 0x%02x\n", + irq, basr, sr, mr); #if defined(REAL_DMA) - /* - * We should only get PHASE MISMATCH and EOP interrupts if we have - * DMA enabled, so do a sanity check based on the current setting - * of the MODE register. + if ((mr & MR_DMA_MODE) || (mr & MR_MONITOR_BSY)) { + /* Probably End of DMA, Phase Mismatch or Loss of BSY. + * We ack IRQ after clearing Mode Register. Workarounds + * for End of DMA errata need to happen in DMA Mode. */ - if ((NCR5380_read(MODE_REG) & MR_DMA_MODE) && - ((basr & BASR_END_DMA_TRANSFER) || - !(basr & BASR_PHASE_MATCH))) { + dsprintk(NDEBUG_INTR, instance, "interrupt in DMA mode\n"); - dprintk(NDEBUG_INTR, "scsi%d: PHASE MISM or EOP interrupt\n", HOSTNO); - NCR5380_dma_complete( instance ); - done = 0; - } else + if (hostdata->connected) { + NCR5380_dma_complete(instance); + queue_work(hostdata->work_q, &hostdata->main_task); + } else { + NCR5380_write(MODE_REG, MR_BASE); + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + } + } else #endif /* REAL_DMA */ - { -/* MS: Ignore unknown phase mismatch interrupts (caused by EOP interrupt) */ - if (basr & BASR_PHASE_MATCH) - dprintk(NDEBUG_INTR, "scsi%d: unknown interrupt, " - "BASR 0x%x, MR 0x%x, SR 0x%x\n", - HOSTNO, basr, NCR5380_read(MODE_REG), - NCR5380_read(STATUS_REG)); - (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); + if ((NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_mask) && + (sr & (SR_SEL | SR_IO | SR_BSY | SR_RST)) == (SR_SEL | SR_IO)) { + /* Probably reselected */ + NCR5380_write(SELECT_ENABLE_REG, 0); + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + + dsprintk(NDEBUG_INTR, instance, "interrupt with SEL and IO\n"); + + if (!hostdata->connected) { + NCR5380_reselect(instance); + queue_work(hostdata->work_q, &hostdata->main_task); + } + if (!hostdata->connected) + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); + } else { + /* Probably Bus Reset */ + NCR5380_read(RESET_PARITY_INTERRUPT_REG); + + dsprintk(NDEBUG_INTR, instance, "unknown interrupt\n"); #ifdef SUN3_SCSI_VME - dregs->csr |= CSR_DMA_ENABLE; + dregs->csr |= CSR_DMA_ENABLE; #endif - } - } /* if !(SELECTION || PARITY) */ + } handled = 1; - } /* BASR & IRQ */ else { - printk(KERN_NOTICE "scsi%d: interrupt without IRQ bit set in BASR, " - "BASR 0x%X, MR 0x%X, SR 0x%x\n", HOSTNO, basr, - NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG)); - (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); + } else { + shost_printk(KERN_NOTICE, instance, "interrupt without IRQ bit\n"); #ifdef SUN3_SCSI_VME dregs->csr |= CSR_DMA_ENABLE; #endif } - if (!done) { - dprintk(NDEBUG_INTR, "scsi%d: in int routine, calling main\n", HOSTNO); - /* Put a call to NCR5380_main() on the queue... */ - queue_main(shost_priv(instance)); - } + spin_unlock_irqrestore(&hostdata->lock, flags); + return IRQ_RETVAL(handled); } /* * Function : int NCR5380_select(struct Scsi_Host *instance, - * struct scsi_cmnd *cmd) + * struct scsi_cmnd *cmd) * * Purpose : establishes I_T_L or I_T_L_Q nexus for new or existing command, - * including ARBITRATION, SELECTION, and initial message out for - * IDENTIFY and queue messages. + * including ARBITRATION, SELECTION, and initial message out for + * IDENTIFY and queue messages. * * Inputs : instance - instantiation of the 5380 driver on which this - * target lives, cmd - SCSI command to execute. + * target lives, cmd - SCSI command to execute. * - * Returns : -1 if selection could not execute for some reason, - * 0 if selection succeeded or failed because the target - * did not respond. + * Returns cmd if selection failed but should be retried, + * NULL if selection failed and should not be retried, or + * NULL if selection succeeded (hostdata->connected == cmd). * * Side effects : - * If bus busy, arbitration failed, etc, NCR5380_select() will exit - * with registers as they should have been on entry - ie - * SELECT_ENABLE will be set appropriately, the NCR5380 - * will cease to drive any SCSI bus signals. + * If bus busy, arbitration failed, etc, NCR5380_select() will exit + * with registers as they should have been on entry - ie + * SELECT_ENABLE will be set appropriately, the NCR5380 + * will cease to drive any SCSI bus signals. * - * If successful : I_T_L or I_T_L_Q nexus will be established, - * instance->connected will be set to cmd. - * SELECT interrupt will be disabled. + * If successful : I_T_L or I_T_L_Q nexus will be established, + * instance->connected will be set to cmd. + * SELECT interrupt will be disabled. * - * If failed (no target) : cmd->scsi_done() will be called, and the - * cmd->result host byte set to DID_BAD_TARGET. + * If failed (no target) : cmd->scsi_done() will be called, and the + * cmd->result host byte set to DID_BAD_TARGET. */ -static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) +static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance, + struct scsi_cmnd *cmd) { - SETUP_HOSTDATA(instance); + struct NCR5380_hostdata *hostdata = shost_priv(instance); unsigned char tmp[3], phase; unsigned char *data; int len; - unsigned long timeout; - unsigned long flags; + int err; - hostdata->restart_select = 0; NCR5380_dprint(NDEBUG_ARBITRATION, instance); - dprintk(NDEBUG_ARBITRATION, "scsi%d: starting arbitration, id = %d\n", HOSTNO, - instance->this_id); + dsprintk(NDEBUG_ARBITRATION, instance, "starting arbitration, id = %d\n", + instance->this_id); + + /* + * Arbitration and selection phases are slow and involve dropping the + * lock, so we have to watch out for EH. An exception handler may + * change 'selecting' to NULL. This function will then return NULL + * so that the caller will forget about 'cmd'. (During information + * transfer phases, EH may change 'connected' to NULL.) + */ + hostdata->selecting = cmd; /* * Set the phase bits to 0, otherwise the NCR5380 won't drive the * data bus during SELECTION. */ - local_irq_save(flags); - if (hostdata->connected) { - local_irq_restore(flags); - return -1; - } NCR5380_write(TARGET_COMMAND_REG, 0); /* @@ -1337,96 +1244,77 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask); NCR5380_write(MODE_REG, MR_ARBITRATE); - local_irq_restore(flags); - - /* Wait for arbitration logic to complete */ -#if defined(NCR_TIMEOUT) - { - unsigned long timeout = jiffies + 2*NCR_TIMEOUT; + /* The chip now waits for BUS FREE phase. Then after the 800 ns + * Bus Free Delay, arbitration will begin. + */ - while (!(NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_PROGRESS) && - time_before(jiffies, timeout) && !hostdata->connected) - ; - if (time_after_eq(jiffies, timeout)) { - printk("scsi : arbitration timeout at %d\n", __LINE__); - NCR5380_write(MODE_REG, MR_BASE); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - return -1; - } + spin_unlock_irq(&hostdata->lock); + err = NCR5380_poll_politely2(instance, MODE_REG, MR_ARBITRATE, 0, + INITIATOR_COMMAND_REG, ICR_ARBITRATION_PROGRESS, + ICR_ARBITRATION_PROGRESS, HZ); + spin_lock_irq(&hostdata->lock); + if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE)) { + /* Reselection interrupt */ + goto out; } -#else /* NCR_TIMEOUT */ - while (!(NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_PROGRESS) && - !hostdata->connected) - ; -#endif - - dprintk(NDEBUG_ARBITRATION, "scsi%d: arbitration complete\n", HOSTNO); - - if (hostdata->connected) { + if (err < 0) { NCR5380_write(MODE_REG, MR_BASE); - return -1; + shost_printk(KERN_ERR, instance, + "select: arbitration timeout\n"); + goto out; } - /* - * The arbitration delay is 2.2us, but this is a minimum and there is - * no maximum so we can safely sleep for ceil(2.2) usecs to accommodate - * the integral nature of udelay(). - * - */ + spin_unlock_irq(&hostdata->lock); + /* The SCSI-2 arbitration delay is 2.4 us */ udelay(3); /* Check for lost arbitration */ if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) || (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) || - (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) || - hostdata->connected) { + (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) { NCR5380_write(MODE_REG, MR_BASE); - dprintk(NDEBUG_ARBITRATION, "scsi%d: lost arbitration, deasserting MR_ARBITRATE\n", - HOSTNO); - return -1; + dsprintk(NDEBUG_ARBITRATION, instance, "lost arbitration, deasserting MR_ARBITRATE\n"); + spin_lock_irq(&hostdata->lock); + goto out; } - /* after/during arbitration, BSY should be asserted. - IBM DPES-31080 Version S31Q works now */ - /* Tnx to Thomas_Roesch@m2.maus.de for finding this! (Roman) */ + /* After/during arbitration, BSY should be asserted. + * IBM DPES-31080 Version S31Q works now + * Tnx to Thomas_Roesch@m2.maus.de for finding this! (Roman) + */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_SEL | ICR_ASSERT_BSY); - if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) || - hostdata->connected) { - NCR5380_write(MODE_REG, MR_BASE); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - dprintk(NDEBUG_ARBITRATION, "scsi%d: lost arbitration, deasserting ICR_ASSERT_SEL\n", - HOSTNO); - return -1; - } - /* * Again, bus clear + bus settle time is 1.2us, however, this is * a minimum so we'll udelay ceil(1.2) */ -#ifdef CONFIG_ATARI_SCSI_TOSHIBA_DELAY - /* ++roman: But some targets (see above :-) seem to need a bit more... */ - udelay(15); -#else - udelay(2); -#endif + if (hostdata->flags & FLAG_TOSHIBA_DELAY) + udelay(15); + else + udelay(2); - if (hostdata->connected) { + spin_lock_irq(&hostdata->lock); + + /* NCR5380_reselect() clears MODE_REG after a reselection interrupt */ + if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE)) + goto out; + + if (!hostdata->selecting) { NCR5380_write(MODE_REG, MR_BASE); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - return -1; + goto out; } - dprintk(NDEBUG_ARBITRATION, "scsi%d: won arbitration\n", HOSTNO); + dsprintk(NDEBUG_ARBITRATION, instance, "won arbitration\n"); /* * Now that we have won arbitration, start Selection process, asserting * the host and target ID's on the SCSI bus. */ - NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << cmd->device->id))); + NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask | (1 << scmd_id(cmd))); /* * Raise ATN while SEL is true before BSY goes false from arbitration, @@ -1434,22 +1322,18 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) * phase immediately after selection. */ - NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_BSY | - ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL )); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY | + ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL); NCR5380_write(MODE_REG, MR_BASE); /* * Reselect interrupts must be turned off prior to the dropping of BSY, * otherwise we will trigger an interrupt. */ - - if (hostdata->connected) { - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - return -1; - } - NCR5380_write(SELECT_ENABLE_REG, 0); + spin_unlock_irq(&hostdata->lock); + /* * The initiator shall then wait at least two deskew delays and release * the BSY signal. @@ -1457,8 +1341,8 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */ /* Reset BSY */ - NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA | - ICR_ASSERT_ATN | ICR_ASSERT_SEL)); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | + ICR_ASSERT_ATN | ICR_ASSERT_SEL); /* * Something weird happens when we cease to drive BSY - looks @@ -1479,45 +1363,39 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) udelay(1); - dprintk(NDEBUG_SELECTION, "scsi%d: selecting target %d\n", HOSTNO, cmd->device->id); + dsprintk(NDEBUG_SELECTION, instance, "selecting target %d\n", scmd_id(cmd)); /* * The SCSI specification calls for a 250 ms timeout for the actual * selection. */ - timeout = jiffies + msecs_to_jiffies(250); - - /* - * XXX very interesting - we're seeing a bounce where the BSY we - * asserted is being reflected / still asserted (propagation delay?) - * and it's detecting as true. Sigh. - */ - -#if 0 - /* ++roman: If a target conformed to the SCSI standard, it wouldn't assert - * IO while SEL is true. But again, there are some disks out the in the - * world that do that nevertheless. (Somebody claimed that this announces - * reselection capability of the target.) So we better skip that test and - * only wait for BSY... (Famous german words: Der Klügere gibt nach :-) - */ - - while (time_before(jiffies, timeout) && - !(NCR5380_read(STATUS_REG) & (SR_BSY | SR_IO))) - ; + err = NCR5380_poll_politely(instance, STATUS_REG, SR_BSY, SR_BSY, + msecs_to_jiffies(250)); if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) { + spin_lock_irq(&hostdata->lock); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); NCR5380_reselect(instance); - printk(KERN_ERR "scsi%d: reselection after won arbitration?\n", - HOSTNO); + if (!hostdata->connected) + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); + shost_printk(KERN_ERR, instance, "reselection after won arbitration?\n"); + goto out; + } + + if (err < 0) { + spin_lock_irq(&hostdata->lock); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - return -1; + /* Can't touch cmd if it has been reclaimed by the scsi ML */ + if (hostdata->selecting) { + cmd->result = DID_BAD_TARGET << 16; + complete_cmd(instance, cmd); + dsprintk(NDEBUG_SELECTION, instance, "target did not respond within 250ms\n"); + cmd = NULL; + } + goto out; } -#else - while (time_before(jiffies, timeout) && !(NCR5380_read(STATUS_REG) & SR_BSY)) - ; -#endif /* * No less than two deskew delays after the initiator detects the @@ -1529,29 +1407,6 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); - if (!(NCR5380_read(STATUS_REG) & SR_BSY)) { - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - if (hostdata->targets_present & (1 << cmd->device->id)) { - printk(KERN_ERR "scsi%d: weirdness\n", HOSTNO); - if (hostdata->restart_select) - printk(KERN_NOTICE "\trestart select\n"); - NCR5380_dprint(NDEBUG_ANY, instance); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - return -1; - } - cmd->result = DID_BAD_TARGET << 16; -#ifdef SUPPORT_TAGS - cmd_free_tag(cmd); -#endif - cmd->scsi_done(cmd); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - dprintk(NDEBUG_SELECTION, "scsi%d: target did not respond within 250ms\n", HOSTNO); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - return 0; - } - - hostdata->targets_present |= (1 << cmd->device->id); - /* * Since we followed the SCSI spec, and raised ATN while SEL * was true but before BSY was false during selection, the information @@ -1563,16 +1418,27 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) * until it wraps back to 0. * * XXX - it turns out that there are some broken SCSI-II devices, - * which claim to support tagged queuing but fail when more than - * some number of commands are issued at once. + * which claim to support tagged queuing but fail when more than + * some number of commands are issued at once. */ /* Wait for start of REQ/ACK handshake */ - while (!(NCR5380_read(STATUS_REG) & SR_REQ)) - ; - dprintk(NDEBUG_SELECTION, "scsi%d: target %d selected, going into MESSAGE OUT phase.\n", - HOSTNO, cmd->device->id); + err = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ); + spin_lock_irq(&hostdata->lock); + if (err < 0) { + shost_printk(KERN_ERR, instance, "select: REQ timeout\n"); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); + goto out; + } + if (!hostdata->selecting) { + do_abort(instance); + goto out; + } + + dsprintk(NDEBUG_SELECTION, instance, "target %d selected, going into MESSAGE OUT phase.\n", + scmd_id(cmd)); tmp[0] = IDENTIFY(1, cmd->device->lun); #ifdef SUPPORT_TAGS @@ -1591,11 +1457,12 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) data = tmp; phase = PHASE_MSGOUT; NCR5380_transfer_pio(instance, &phase, &len, &data); - dprintk(NDEBUG_SELECTION, "scsi%d: nexus established.\n", HOSTNO); + dsprintk(NDEBUG_SELECTION, instance, "nexus established.\n"); /* XXX need to handle errors here */ + hostdata->connected = cmd; #ifndef SUPPORT_TAGS - hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); + hostdata->busy[cmd->device->id] |= 1 << cmd->device->lun; #endif #ifdef SUN3_SCSI_VME dregs->csr |= CSR_INTR; @@ -1603,24 +1470,30 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) initialize_SCp(cmd); - return 0; + cmd = NULL; + +out: + if (!hostdata->selecting) + return NULL; + hostdata->selecting = NULL; + return cmd; } /* * Function : int NCR5380_transfer_pio (struct Scsi_Host *instance, - * unsigned char *phase, int *count, unsigned char **data) + * unsigned char *phase, int *count, unsigned char **data) * * Purpose : transfers data in given phase using polled I/O * * Inputs : instance - instance of driver, *phase - pointer to - * what phase is expected, *count - pointer to number of - * bytes to transfer, **data - pointer to data pointer. + * what phase is expected, *count - pointer to number of + * bytes to transfer, **data - pointer to data pointer. * * Returns : -1 when different phase is entered without transferring - * maximum number of bytes, 0 if all bytes are transferred or exit - * is in same phase. + * maximum number of bytes, 0 if all bytes are transferred or exit + * is in same phase. * - * Also, *phase, *count, *data are modified in place. + * Also, *phase, *count, *data are modified in place. * * XXX Note : handling for bus free may be useful. */ @@ -1635,9 +1508,9 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) { - register unsigned char p = *phase, tmp; - register int c = *count; - register unsigned char *d = *data; + unsigned char p = *phase, tmp; + int c = *count; + unsigned char *d = *data; /* * The NCR5380 chip will only drive the SCSI bus when the @@ -1652,14 +1525,15 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, * Wait for assertion of REQ, after which the phase bits will be * valid */ - while (!((tmp = NCR5380_read(STATUS_REG)) & SR_REQ)) - ; - dprintk(NDEBUG_HANDSHAKE, "scsi%d: REQ detected\n", HOSTNO); + if (NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ) < 0) + break; + + dsprintk(NDEBUG_HANDSHAKE, instance, "REQ asserted\n"); /* Check for phase mismatch */ - if ((tmp & PHASE_MASK) != p) { - dprintk(NDEBUG_PIO, "scsi%d: phase mismatch\n", HOSTNO); + if ((NCR5380_read(STATUS_REG) & PHASE_MASK) != p) { + dsprintk(NDEBUG_PIO, instance, "phase mismatch\n"); NCR5380_dprint_phase(NDEBUG_PIO, instance); break; } @@ -1684,35 +1558,36 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA); NCR5380_dprint(NDEBUG_PIO, instance); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | - ICR_ASSERT_DATA | ICR_ASSERT_ACK); + ICR_ASSERT_DATA | ICR_ASSERT_ACK); } else { NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | - ICR_ASSERT_DATA | ICR_ASSERT_ATN); + ICR_ASSERT_DATA | ICR_ASSERT_ATN); NCR5380_dprint(NDEBUG_PIO, instance); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | - ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_ACK); + ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_ACK); } } else { NCR5380_dprint(NDEBUG_PIO, instance); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ACK); } - while (NCR5380_read(STATUS_REG) & SR_REQ) - ; + if (NCR5380_poll_politely(instance, + STATUS_REG, SR_REQ, 0, 5 * HZ) < 0) + break; - dprintk(NDEBUG_HANDSHAKE, "scsi%d: req false, handshake complete\n", HOSTNO); + dsprintk(NDEBUG_HANDSHAKE, instance, "REQ negated, handshake complete\n"); - /* - * We have several special cases to consider during REQ/ACK handshaking : - * 1. We were in MSGOUT phase, and we are on the last byte of the - * message. ATN must be dropped as ACK is dropped. - * - * 2. We are in a MSGIN phase, and we are on the last byte of the - * message. We must exit with ACK asserted, so that the calling - * code may raise ATN before dropping ACK to reject the message. - * - * 3. ACK and ATN are clear and the target may proceed as normal. - */ +/* + * We have several special cases to consider during REQ/ACK handshaking : + * 1. We were in MSGOUT phase, and we are on the last byte of the + * message. ATN must be dropped as ACK is dropped. + * + * 2. We are in a MSGIN phase, and we are on the last byte of the + * message. We must exit with ACK asserted, so that the calling + * code may raise ATN before dropping ACK to reject the message. + * + * 3. ACK and ATN are clear and the target may proceed as normal. + */ if (!(p == PHASE_MSGIN && c == 1)) { if (p == PHASE_MSGOUT && c > 1) NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); @@ -1721,16 +1596,16 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, } } while (--c); - dprintk(NDEBUG_PIO, "scsi%d: residual %d\n", HOSTNO, c); + dsprintk(NDEBUG_PIO, instance, "residual %d\n", c); *count = c; *data = d; tmp = NCR5380_read(STATUS_REG); /* The phase read from the bus is valid if either REQ is (already) - * asserted or if ACK hasn't been released yet. The latter is the case if - * we're in MSGIN and all wanted bytes have been received. + * asserted or if ACK hasn't been released yet. The latter applies if + * we're in MSG IN, DATA IN or STATUS and all bytes have been received. */ - if ((tmp & SR_REQ) || (p == PHASE_MSGIN && c == 0)) + if ((tmp & SR_REQ) || ((tmp & SR_IO) && c == 0)) *phase = tmp & PHASE_MASK; else *phase = PHASE_UNKNOWN; @@ -1741,19 +1616,45 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, return -1; } -/* - * Function : do_abort (Scsi_Host *host) +/** + * do_reset - issue a reset command + * @instance: adapter to reset * - * Purpose : abort the currently established nexus. Should only be - * called from a routine which can drop into a + * Issue a reset sequence to the NCR5380 and try and get the bus + * back into sane shape. * - * Returns : 0 on success, -1 on failure. + * This clears the reset interrupt flag because there may be no handler for + * it. When the driver is initialized, the NCR5380_intr() handler has not yet + * been installed. And when in EH we may have released the ST DMA interrupt. + */ + +static void do_reset(struct Scsi_Host *instance) +{ + unsigned long flags; + + local_irq_save(flags); + NCR5380_write(TARGET_COMMAND_REG, + PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK)); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST); + udelay(50); + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); + local_irq_restore(flags); +} + +/** + * do_abort - abort the currently established nexus by going to + * MESSAGE OUT phase and sending an ABORT message. + * @instance: relevant scsi host instance + * + * Returns 0 on success, -1 on failure. */ static int do_abort(struct Scsi_Host *instance) { - unsigned char tmp, *msgptr, phase; + unsigned char *msgptr, phase, tmp; int len; + int rc; /* Request message out phase */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); @@ -1768,16 +1669,20 @@ static int do_abort(struct Scsi_Host *instance) * the target sees, so we just handshake. */ - while (!((tmp = NCR5380_read(STATUS_REG)) & SR_REQ)) - ; + rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 10 * HZ); + if (rc < 0) + goto timeout; + + tmp = NCR5380_read(STATUS_REG) & PHASE_MASK; NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp)); - if ((tmp & PHASE_MASK) != PHASE_MSGOUT) { - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | - ICR_ASSERT_ACK); - while (NCR5380_read(STATUS_REG) & SR_REQ) - ; + if (tmp != PHASE_MSGOUT) { + NCR5380_write(INITIATOR_COMMAND_REG, + ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK); + rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 3 * HZ); + if (rc < 0) + goto timeout; NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN); } @@ -1793,26 +1698,29 @@ static int do_abort(struct Scsi_Host *instance) */ return len ? -1 : 0; + +timeout: + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + return -1; } #if defined(REAL_DMA) /* * Function : int NCR5380_transfer_dma (struct Scsi_Host *instance, - * unsigned char *phase, int *count, unsigned char **data) + * unsigned char *phase, int *count, unsigned char **data) * * Purpose : transfers data in given phase using either real - * or pseudo DMA. + * or pseudo DMA. * * Inputs : instance - instance of driver, *phase - pointer to - * what phase is expected, *count - pointer to number of - * bytes to transfer, **data - pointer to data pointer. + * what phase is expected, *count - pointer to number of + * bytes to transfer, **data - pointer to data pointer. * * Returns : -1 when different phase is entered without transferring - * maximum number of bytes, 0 if all bytes or transferred or exit - * is in same phase. - * - * Also, *phase, *count, *data are modified in place. + * maximum number of bytes, 0 if all bytes or transferred or exit + * is in same phase. * + * Also, *phase, *count, *data are modified in place. */ @@ -1820,10 +1728,9 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) { - SETUP_HOSTDATA(instance); + struct NCR5380_hostdata *hostdata = shost_priv(instance); register int c = *count; register unsigned char p = *phase; - unsigned long flags; #if defined(CONFIG_SUN3) /* sanity check */ @@ -1834,29 +1741,22 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, } hostdata->dma_len = c; - dprintk(NDEBUG_DMA, "scsi%d: initializing DMA for %s, %d bytes %s %p\n", - instance->host_no, (p & SR_IO) ? "reading" : "writing", - c, (p & SR_IO) ? "to" : "from", *data); + dsprintk(NDEBUG_DMA, instance, "initializing DMA %s: length %d, address %p\n", + (p & SR_IO) ? "receive" : "send", c, *data); /* netbsd turns off ints here, why not be safe and do it too */ - local_irq_save(flags); /* send start chain */ sun3scsi_dma_start(c, *data); + NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p)); + NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY | + MR_ENABLE_EOP_INTR); if (p & SR_IO) { - NCR5380_write(TARGET_COMMAND_REG, 1); - NCR5380_read(RESET_PARITY_INTERRUPT_REG); NCR5380_write(INITIATOR_COMMAND_REG, 0); - NCR5380_write(MODE_REG, - (NCR5380_read(MODE_REG) | MR_DMA_MODE | MR_ENABLE_EOP_INTR)); NCR5380_write(START_DMA_INITIATOR_RECEIVE_REG, 0); } else { - NCR5380_write(TARGET_COMMAND_REG, 0); - NCR5380_read(RESET_PARITY_INTERRUPT_REG); NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_DATA); - NCR5380_write(MODE_REG, - (NCR5380_read(MODE_REG) | MR_DMA_MODE | MR_ENABLE_EOP_INTR)); NCR5380_write(START_DMA_SEND_REG, 0); } @@ -1864,8 +1764,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, dregs->csr |= CSR_DMA_ENABLE; #endif - local_irq_restore(flags); - sun3_dma_active = 1; #else /* !defined(CONFIG_SUN3) */ @@ -1880,25 +1778,20 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, if (hostdata->read_overruns && (p & SR_IO)) c -= hostdata->read_overruns; - dprintk(NDEBUG_DMA, "scsi%d: initializing DMA for %s, %d bytes %s %p\n", - HOSTNO, (p & SR_IO) ? "reading" : "writing", - c, (p & SR_IO) ? "to" : "from", d); + dsprintk(NDEBUG_DMA, instance, "initializing DMA %s: length %d, address %p\n", + (p & SR_IO) ? "receive" : "send", c, d); NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p)); - -#ifdef REAL_DMA - NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_EOP_INTR | MR_MONITOR_BSY); -#endif /* def REAL_DMA */ + NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY | + MR_ENABLE_EOP_INTR); if (!(hostdata->flags & FLAG_LATE_DMA_SETUP)) { /* On the Medusa, it is a must to initialize the DMA before * starting the NCR. This is also the cleaner way for the TT. */ - local_irq_save(flags); hostdata->dma_len = (p & SR_IO) ? NCR5380_dma_read_setup(instance, d, c) : NCR5380_dma_write_setup(instance, d, c); - local_irq_restore(flags); } if (p & SR_IO) @@ -1912,11 +1805,9 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, /* On the Falcon, the DMA setup must be done after the last */ /* NCR access, else the DMA setup gets trashed! */ - local_irq_save(flags); hostdata->dma_len = (p & SR_IO) ? NCR5380_dma_read_setup(instance, d, c) : NCR5380_dma_write_setup(instance, d, c); - local_irq_restore(flags); } #endif /* !defined(CONFIG_SUN3) */ @@ -1928,23 +1819,22 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, * Function : NCR5380_information_transfer (struct Scsi_Host *instance) * * Purpose : run through the various SCSI phases and do as the target - * directs us to. Operates on the currently connected command, - * instance->connected. + * directs us to. Operates on the currently connected command, + * instance->connected. * * Inputs : instance, instance for which we are doing commands * * Side effects : SCSI things happen, the disconnected queue will be - * modified if a command disconnects, *instance->connected will - * change. + * modified if a command disconnects, *instance->connected will + * change. * * XXX Note : we need to watch for bus free or a reset condition here - * to recover from an unexpected bus free condition. + * to recover from an unexpected bus free condition. */ static void NCR5380_information_transfer(struct Scsi_Host *instance) { - SETUP_HOSTDATA(instance); - unsigned long flags; + struct NCR5380_hostdata *hostdata = shost_priv(instance); unsigned char msgout = NOP; int sink = 0; int len; @@ -1953,13 +1843,15 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) #endif unsigned char *data; unsigned char phase, tmp, extended_msg[10], old_phase = 0xff; - struct scsi_cmnd *cmd = (struct scsi_cmnd *) hostdata->connected; + struct scsi_cmnd *cmd; #ifdef SUN3_SCSI_VME dregs->csr |= CSR_INTR; #endif - while (1) { + while ((cmd = hostdata->connected)) { + struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); + tmp = NCR5380_read(STATUS_REG); /* We only have a valid SCSI phase when REQ is asserted */ if (tmp & SR_REQ) { @@ -1984,7 +1876,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) /* this command setup for dma yet? */ if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != cmd)) { if (cmd->request->cmd_type == REQ_TYPE_FS) { - sun3scsi_dma_setup(d, count, + sun3scsi_dma_setup(instance, d, count, rq_data_dir(cmd->request)); sun3_dma_setup_done = cmd; } @@ -2000,11 +1892,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp)); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | - ICR_ASSERT_ACK); + ICR_ASSERT_ACK); while (NCR5380_read(STATUS_REG) & SR_REQ) ; NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | - ICR_ASSERT_ATN); + ICR_ASSERT_ATN); sink = 0; continue; } @@ -2012,12 +1904,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) switch (phase) { case PHASE_DATAOUT: #if (NDEBUG & NDEBUG_NO_DATAOUT) - printk("scsi%d: NDEBUG_NO_DATAOUT set, attempted DATAOUT " - "aborted\n", HOSTNO); + shost_printk(KERN_DEBUG, instance, "NDEBUG_NO_DATAOUT set, attempted DATAOUT aborted\n"); sink = 1; do_abort(instance); cmd->result = DID_ERROR << 16; - cmd->scsi_done(cmd); + complete_cmd(instance, cmd); return; #endif case PHASE_DATAIN: @@ -2031,13 +1922,10 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) --cmd->SCp.buffers_residual; cmd->SCp.this_residual = cmd->SCp.buffer->length; cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); - /* ++roman: Try to merge some scatter-buffers if - * they are at contiguous physical addresses. - */ merge_contiguous_buffers(cmd); - dprintk(NDEBUG_INFORMATION, "scsi%d: %d bytes and %d buffers left\n", - HOSTNO, cmd->SCp.this_residual, - cmd->SCp.buffers_residual); + dsprintk(NDEBUG_INFORMATION, instance, "%d bytes and %d buffers left\n", + cmd->SCp.this_residual, + cmd->SCp.buffers_residual); } /* @@ -2051,16 +1939,18 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) */ /* ++roman: I suggest, this should be - * #if def(REAL_DMA) + * #if def(REAL_DMA) * instead of leaving REAL_DMA out. */ #if defined(REAL_DMA) - if ( #if !defined(CONFIG_SUN3) - !cmd->device->borken && + transfersize = 0; + if (!cmd->device->borken) #endif - (transfersize = NCR5380_dma_xfer_len(instance, cmd, phase)) >= DMA_MIN_SIZE) { + transfersize = NCR5380_dma_xfer_len(instance, cmd, phase); + + if (transfersize >= DMA_MIN_SIZE) { len = transfersize; cmd->SCp.phase = phase; if (NCR5380_transfer_dma(instance, &phase, @@ -2068,16 +1958,15 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) /* * If the watchdog timer fires, all future * accesses to this device will use the - * polled-IO. */ + * polled-IO. + */ scmd_printk(KERN_INFO, cmd, "switching to slow handshake\n"); cmd->device->borken = 1; - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | - ICR_ASSERT_ATN); sink = 1; do_abort(instance); cmd->result = DID_ERROR << 16; - cmd->scsi_done(cmd); + complete_cmd(instance, cmd); /* XXX - need to source or sink data here, as appropriate */ } else { #ifdef REAL_DMA @@ -2093,9 +1982,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) } } else #endif /* defined(REAL_DMA) */ + { + spin_unlock_irq(&hostdata->lock); NCR5380_transfer_pio(instance, &phase, - (int *)&cmd->SCp.this_residual, - (unsigned char **)&cmd->SCp.ptr); + (int *)&cmd->SCp.this_residual, + (unsigned char **)&cmd->SCp.ptr); + spin_lock_irq(&hostdata->lock); + } #if defined(CONFIG_SUN3) && defined(REAL_DMA) /* if we had intended to dma that command clear it */ if (sun3_dma_setup_done == cmd) @@ -2105,162 +1998,64 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) case PHASE_MSGIN: len = 1; data = &tmp; - NCR5380_write(SELECT_ENABLE_REG, 0); /* disable reselects */ NCR5380_transfer_pio(instance, &phase, &len, &data); cmd->SCp.Message = tmp; switch (tmp) { - /* - * Linking lets us reduce the time required to get the - * next command out to the device, hopefully this will - * mean we don't waste another revolution due to the delays - * required by ARBITRATION and another SELECTION. - * - * In the current implementation proposal, low level drivers - * merely have to start the next command, pointed to by - * next_link, done() is called as with unlinked commands. - */ -#ifdef LINKED - case LINKED_CMD_COMPLETE: - case LINKED_FLG_CMD_COMPLETE: - /* Accept message by clearing ACK */ - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - - dprintk(NDEBUG_LINKED, "scsi%d: target %d lun %llu linked command " - "complete.\n", HOSTNO, cmd->device->id, cmd->device->lun); - - /* Enable reselect interrupts */ - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - /* - * Sanity check : A linked command should only terminate - * with one of these messages if there are more linked - * commands available. - */ - - if (!cmd->next_link) { - printk(KERN_NOTICE "scsi%d: target %d lun %llu " - "linked command complete, no next_link\n", - HOSTNO, cmd->device->id, cmd->device->lun); - sink = 1; - do_abort(instance); - return; - } - - initialize_SCp(cmd->next_link); - /* The next command is still part of this process; copy it - * and don't free it! */ - cmd->next_link->tag = cmd->tag; - cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); - dprintk(NDEBUG_LINKED, "scsi%d: target %d lun %llu linked request " - "done, calling scsi_done().\n", - HOSTNO, cmd->device->id, cmd->device->lun); - cmd->scsi_done(cmd); - cmd = hostdata->connected; - break; -#endif /* def LINKED */ case ABORT: case COMMAND_COMPLETE: /* Accept message by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d, lun %llu " - "completed\n", HOSTNO, cmd->device->id, cmd->device->lun); + dsprintk(NDEBUG_QUEUES, instance, + "COMMAND COMPLETE %p target %d lun %llu\n", + cmd, scmd_id(cmd), cmd->device->lun); - local_irq_save(flags); - hostdata->retain_dma_intr++; hostdata->connected = NULL; #ifdef SUPPORT_TAGS cmd_free_tag(cmd); if (status_byte(cmd->SCp.Status) == QUEUE_FULL) { - /* Turn a QUEUE FULL status into BUSY, I think the - * mid level cannot handle QUEUE FULL :-( (The - * command is retried after BUSY). Also update our - * queue size to the number of currently issued - * commands now. - */ - /* ++Andreas: the mid level code knows about - QUEUE_FULL now. */ - struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][cmd->device->lun]; - dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %llu returned " - "QUEUE_FULL after %d commands\n", - HOSTNO, cmd->device->id, cmd->device->lun, - ta->nr_allocated); + u8 lun = cmd->device->lun; + struct tag_alloc *ta = &hostdata->TagAlloc[scmd_id(cmd)][lun]; + + dsprintk(NDEBUG_TAGS, instance, + "QUEUE_FULL %p target %d lun %d nr_allocated %d\n", + cmd, scmd_id(cmd), lun, ta->nr_allocated); if (ta->queue_size > ta->nr_allocated) - ta->nr_allocated = ta->queue_size; + ta->queue_size = ta->nr_allocated; } -#else - hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); #endif - /* Enable reselect interrupts */ - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - - /* - * I'm not sure what the correct thing to do here is : - * - * If the command that just executed is NOT a request - * sense, the obvious thing to do is to set the result - * code to the values of the stored parameters. - * - * If it was a REQUEST SENSE command, we need some way to - * differentiate between the failure code of the original - * and the failure code of the REQUEST sense - the obvious - * case is success, where we fall through and leave the - * result code unchanged. - * - * The non-obvious place is where the REQUEST SENSE failed - */ - - if (cmd->cmnd[0] != REQUEST_SENSE) - cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); - else if (status_byte(cmd->SCp.Status) != GOOD) - cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); - - if ((cmd->cmnd[0] == REQUEST_SENSE) && - hostdata->ses.cmd_len) { - scsi_eh_restore_cmnd(cmd, &hostdata->ses); - hostdata->ses.cmd_len = 0 ; - } - - if ((cmd->cmnd[0] != REQUEST_SENSE) && - (status_byte(cmd->SCp.Status) == CHECK_CONDITION)) { - scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0); - - dprintk(NDEBUG_AUTOSENSE, "scsi%d: performing request sense\n", HOSTNO); - LIST(cmd,hostdata->issue_queue); - SET_NEXT(cmd, hostdata->issue_queue); - hostdata->issue_queue = (struct scsi_cmnd *) cmd; - dprintk(NDEBUG_QUEUES, "scsi%d: REQUEST SENSE added to head of " - "issue queue\n", H_NO(cmd)); - } else { - cmd->scsi_done(cmd); + cmd->result &= ~0xffff; + cmd->result |= cmd->SCp.Status; + cmd->result |= cmd->SCp.Message << 8; + + if (cmd->cmnd[0] == REQUEST_SENSE) + complete_cmd(instance, cmd); + else { + if (cmd->SCp.Status == SAM_STAT_CHECK_CONDITION || + cmd->SCp.Status == SAM_STAT_COMMAND_TERMINATED) { + dsprintk(NDEBUG_QUEUES, instance, "autosense: adding cmd %p to tail of autosense queue\n", + cmd); + list_add_tail(&ncmd->list, + &hostdata->autosense); + } else + complete_cmd(instance, cmd); } - local_irq_restore(flags); - - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); /* * Restore phase bits to 0 so an interrupted selection, * arbitration can resume. */ NCR5380_write(TARGET_COMMAND_REG, 0); - while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected) - barrier(); + /* Enable reselect interrupts */ + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - local_irq_save(flags); - hostdata->retain_dma_intr--; - /* ++roman: For Falcon SCSI, release the lock on the - * ST-DMA here if no other commands are waiting on the - * disconnected queue. - */ maybe_release_dma_irq(instance); - local_irq_restore(flags); return; case MESSAGE_REJECT: /* Accept message by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - /* Enable reselect interrupts */ - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); switch (hostdata->last_message) { case HEAD_OF_QUEUE_TAG: case ORDERED_QUEUE_TAG: @@ -2274,27 +2069,20 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) cmd->device->tagged_supported = 0; hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); cmd->tag = TAG_NONE; - dprintk(NDEBUG_TAGS, "scsi%d: target %d lun %llu rejected " - "QUEUE_TAG message; tagged queuing " - "disabled\n", - HOSTNO, cmd->device->id, cmd->device->lun); + dsprintk(NDEBUG_TAGS, instance, "target %d lun %llu rejected QUEUE_TAG message; tagged queuing disabled\n", + scmd_id(cmd), cmd->device->lun); break; } break; case DISCONNECT: /* Accept message by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - local_irq_save(flags); - cmd->device->disconnect = 1; - LIST(cmd,hostdata->disconnected_queue); - SET_NEXT(cmd, hostdata->disconnected_queue); hostdata->connected = NULL; - hostdata->disconnected_queue = cmd; - local_irq_restore(flags); - dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d lun %llu was " - "moved from connected to the " - "disconnected_queue\n", HOSTNO, - cmd->device->id, cmd->device->lun); + list_add(&ncmd->list, &hostdata->disconnected); + dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES, + instance, "connected command %p for target %d lun %llu moved to disconnected queue\n", + cmd, scmd_id(cmd), cmd->device->lun); + /* * Restore phase bits to 0 so an interrupted selection, * arbitration can resume. @@ -2303,9 +2091,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) /* Enable reselect interrupts */ NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - /* Wait for bus free to avoid nasty timeouts */ - while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected) - barrier(); #ifdef SUN3_SCSI_VME dregs->csr |= CSR_DMA_ENABLE; #endif @@ -2324,37 +2109,30 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) case RESTORE_POINTERS: /* Accept message by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - /* Enable reselect interrupts */ - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); break; case EXTENDED_MESSAGE: /* - * Extended messages are sent in the following format : - * Byte - * 0 EXTENDED_MESSAGE == 1 - * 1 length (includes one byte for code, doesn't - * include first two bytes) - * 2 code - * 3..length+1 arguments - * - * Start the extended message buffer with the EXTENDED_MESSAGE + * Start the message buffer with the EXTENDED_MESSAGE * byte, since spi_print_msg() wants the whole thing. */ extended_msg[0] = EXTENDED_MESSAGE; /* Accept first byte by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - dprintk(NDEBUG_EXTENDED, "scsi%d: receiving extended message\n", HOSTNO); + spin_unlock_irq(&hostdata->lock); + + dsprintk(NDEBUG_EXTENDED, instance, "receiving extended message\n"); len = 2; data = extended_msg + 1; phase = PHASE_MSGIN; NCR5380_transfer_pio(instance, &phase, &len, &data); - dprintk(NDEBUG_EXTENDED, "scsi%d: length=%d, code=0x%02x\n", HOSTNO, - (int)extended_msg[1], (int)extended_msg[2]); + dsprintk(NDEBUG_EXTENDED, instance, "length %d, code 0x%02x\n", + (int)extended_msg[1], + (int)extended_msg[2]); - if (!len && extended_msg[1] <= - (sizeof(extended_msg) - 1)) { + if (!len && extended_msg[1] > 0 && + extended_msg[1] <= sizeof(extended_msg) - 2) { /* Accept third byte by clearing ACK */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); len = extended_msg[1] - 1; @@ -2362,8 +2140,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) phase = PHASE_MSGIN; NCR5380_transfer_pio(instance, &phase, &len, &data); - dprintk(NDEBUG_EXTENDED, "scsi%d: message received, residual %d\n", - HOSTNO, len); + dsprintk(NDEBUG_EXTENDED, instance, "message received, residual %d\n", + len); switch (extended_msg[2]) { case EXTENDED_SDTR: @@ -2373,15 +2151,18 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) tmp = 0; } } else if (len) { - printk(KERN_NOTICE "scsi%d: error receiving " - "extended message\n", HOSTNO); + shost_printk(KERN_ERR, instance, "error receiving extended message\n"); tmp = 0; } else { - printk(KERN_NOTICE "scsi%d: extended message " - "code %02x length %d is too long\n", - HOSTNO, extended_msg[2], extended_msg[1]); + shost_printk(KERN_NOTICE, instance, "extended message code %02x length %d is too long\n", + extended_msg[2], extended_msg[1]); tmp = 0; } + + spin_lock_irq(&hostdata->lock); + if (!hostdata->connected) + return; + /* Fall through to reject message */ /* @@ -2390,8 +2171,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) */ default: if (!tmp) { - printk(KERN_INFO "scsi%d: rejecting message ", - instance->host_no); + shost_printk(KERN_ERR, instance, "rejecting message "); spi_print_msg(extended_msg); printk("\n"); } else if (tmp != EXTENDED_MESSAGE) @@ -2414,18 +2194,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) hostdata->last_message = msgout; NCR5380_transfer_pio(instance, &phase, &len, &data); if (msgout == ABORT) { - local_irq_save(flags); -#ifdef SUPPORT_TAGS - cmd_free_tag(cmd); -#else - hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); -#endif hostdata->connected = NULL; cmd->result = DID_ERROR << 16; - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); + complete_cmd(instance, cmd); maybe_release_dma_irq(instance); - local_irq_restore(flags); - cmd->scsi_done(cmd); + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); return; } msgout = NOP; @@ -2447,22 +2220,25 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) cmd->SCp.Status = tmp; break; default: - printk("scsi%d: unknown phase\n", HOSTNO); + shost_printk(KERN_ERR, instance, "unknown phase\n"); NCR5380_dprint(NDEBUG_ANY, instance); } /* switch(phase) */ - } /* if (tmp * SR_REQ) */ - } /* while (1) */ + } else { + spin_unlock_irq(&hostdata->lock); + NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ); + spin_lock_irq(&hostdata->lock); + } + } } /* * Function : void NCR5380_reselect (struct Scsi_Host *instance) * * Purpose : does reselection, initializing the instance->connected - * field to point to the scsi_cmnd for which the I_T_L or I_T_L_Q - * nexus has been reestablished, + * field to point to the scsi_cmnd for which the I_T_L or I_T_L_Q + * nexus has been reestablished, * * Inputs : instance - this instance of the NCR5380. - * */ @@ -2471,7 +2247,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) static void NCR5380_reselect(struct Scsi_Host *instance) { - SETUP_HOSTDATA(instance); + struct NCR5380_hostdata *hostdata = shost_priv(instance); unsigned char target_mask; unsigned char lun; #ifdef SUPPORT_TAGS @@ -2480,7 +2256,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance) unsigned char msg[3]; int __maybe_unused len; unsigned char __maybe_unused *data, __maybe_unused phase; - struct scsi_cmnd *tmp = NULL, *prev; + struct NCR5380_cmd *ncmd; + struct scsi_cmnd *tmp; /* * Disable arbitration, etc. since the host adapter obviously @@ -2488,11 +2265,10 @@ static void NCR5380_reselect(struct Scsi_Host *instance) */ NCR5380_write(MODE_REG, MR_BASE); - hostdata->restart_select = 1; target_mask = NCR5380_read(CURRENT_SCSI_DATA_REG) & ~(hostdata->id_mask); - dprintk(NDEBUG_RESELECTION, "scsi%d: reselect\n", HOSTNO); + dsprintk(NDEBUG_RESELECTION, instance, "reselect\n"); /* * At this point, we have detected that our SCSI ID is on the bus, @@ -2504,17 +2280,22 @@ static void NCR5380_reselect(struct Scsi_Host *instance) */ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY); - - while (NCR5380_read(STATUS_REG) & SR_SEL) - ; + if (NCR5380_poll_politely(instance, + STATUS_REG, SR_SEL, 0, 2 * HZ) < 0) { + NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); + return; + } NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); /* * Wait for target to go into MSGIN. */ - while (!(NCR5380_read(STATUS_REG) & SR_REQ)) - ; + if (NCR5380_poll_politely(instance, + STATUS_REG, SR_REQ, SR_REQ, 2 * HZ) < 0) { + do_abort(instance); + return; + } #if defined(CONFIG_SUN3) && defined(REAL_DMA) /* acknowledge toggle to MSGIN */ @@ -2527,15 +2308,21 @@ static void NCR5380_reselect(struct Scsi_Host *instance) data = msg; phase = PHASE_MSGIN; NCR5380_transfer_pio(instance, &phase, &len, &data); + + if (len) { + do_abort(instance); + return; + } #endif if (!(msg[0] & 0x80)) { - printk(KERN_DEBUG "scsi%d: expecting IDENTIFY message, got ", HOSTNO); + shost_printk(KERN_ERR, instance, "expecting IDENTIFY message, got "); spi_print_msg(msg); + printk("\n"); do_abort(instance); return; } - lun = (msg[0] & 0x07); + lun = msg[0] & 0x07; #if defined(SUPPORT_TAGS) && !defined(CONFIG_SUN3) /* If the phase is still MSGIN, the target wants to send some more @@ -2551,8 +2338,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance) if (!NCR5380_transfer_pio(instance, &phase, &len, &data) && msg[1] == SIMPLE_QUEUE_TAG) tag = msg[2]; - dprintk(NDEBUG_TAGS, "scsi%d: target mask %02x, lun %d sent tag %d at " - "reselection\n", HOSTNO, target_mask, lun, tag); + dsprintk(NDEBUG_TAGS, instance, "reselect: target mask %02x, lun %d sent tag %d\n", + target_mask, lun, tag); } #endif @@ -2561,36 +2348,34 @@ static void NCR5380_reselect(struct Scsi_Host *instance) * just reestablished, and remove it from the disconnected queue. */ - for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue, prev = NULL; - tmp; prev = tmp, tmp = NEXT(tmp)) { - if ((target_mask == (1 << tmp->device->id)) && (lun == tmp->device->lun) + tmp = NULL; + list_for_each_entry(ncmd, &hostdata->disconnected, list) { + struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd); + + if (target_mask == (1 << scmd_id(cmd)) && + lun == (u8)cmd->device->lun #ifdef SUPPORT_TAGS - && (tag == tmp->tag) + && (tag == cmd->tag) #endif ) { - if (prev) { - REMOVE(prev, NEXT(prev), tmp, NEXT(tmp)); - SET_NEXT(prev, NEXT(tmp)); - } else { - REMOVE(-1, hostdata->disconnected_queue, tmp, NEXT(tmp)); - hostdata->disconnected_queue = NEXT(tmp); - } - SET_NEXT(tmp, NULL); + list_del(&ncmd->list); + tmp = cmd; break; } } - if (!tmp) { - printk(KERN_WARNING "scsi%d: warning: target bitmask %02x lun %d " -#ifdef SUPPORT_TAGS - "tag %d " -#endif - "not in disconnected_queue.\n", - HOSTNO, target_mask, lun + if (tmp) { + dsprintk(NDEBUG_RESELECTION | NDEBUG_QUEUES, instance, + "reselect: removed %p from disconnected queue\n", tmp); + } else { + #ifdef SUPPORT_TAGS - , tag + shost_printk(KERN_ERR, instance, "target bitmask 0x%02x lun %d tag %d not in disconnected queue.\n", + target_mask, lun, tag); +#else + shost_printk(KERN_ERR, instance, "target bitmask 0x%02x lun %d not in disconnected queue.\n", + target_mask, lun); #endif - ); /* * Since we have an established nexus that we can't do anything * with, we must abort it. @@ -2614,7 +2399,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance) } /* setup this command for dma if not already */ if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != tmp)) { - sun3scsi_dma_setup(d, count, rq_data_dir(tmp->request)); + sun3scsi_dma_setup(instance, d, count, + rq_data_dir(tmp->request)); sun3_dma_setup_done = tmp; } } @@ -2639,235 +2425,196 @@ static void NCR5380_reselect(struct Scsi_Host *instance) if (!NCR5380_transfer_pio(instance, &phase, &len, &data) && msg[1] == SIMPLE_QUEUE_TAG) tag = msg[2]; - dprintk(NDEBUG_TAGS, "scsi%d: target mask %02x, lun %d sent tag %d at reselection\n" - HOSTNO, target_mask, lun, tag); + dsprintk(NDEBUG_TAGS, instance, "reselect: target mask %02x, lun %d sent tag %d\n" + target_mask, lun, tag); } #endif hostdata->connected = tmp; - dprintk(NDEBUG_RESELECTION, "scsi%d: nexus established, target = %d, lun = %llu, tag = %d\n", - HOSTNO, tmp->device->id, tmp->device->lun, tmp->tag); + dsprintk(NDEBUG_RESELECTION, instance, "nexus established, target %d, lun %llu, tag %d\n", + scmd_id(tmp), tmp->device->lun, tmp->tag); } -/* - * Function : int NCR5380_abort (struct scsi_cmnd *cmd) - * - * Purpose : abort a command - * - * Inputs : cmd - the scsi_cmnd to abort, code - code to set the - * host byte of the result field to, if zero DID_ABORTED is - * used. - * - * Returns : SUCCESS - success, FAILED on failure. - * - * XXX - there is no way to abort the command that is currently - * connected, you have to wait for it to complete. If this is - * a problem, we could implement longjmp() / setjmp(), setjmp() - * called where the loop started in NCR5380_main(). +/** + * list_find_cmd - test for presence of a command in a linked list + * @haystack: list of commands + * @needle: command to search for */ -static -int NCR5380_abort(struct scsi_cmnd *cmd) +static bool list_find_cmd(struct list_head *haystack, + struct scsi_cmnd *needle) { - struct Scsi_Host *instance = cmd->device->host; - SETUP_HOSTDATA(instance); - struct scsi_cmnd *tmp, **prev; - unsigned long flags; + struct NCR5380_cmd *ncmd; - scmd_printk(KERN_NOTICE, cmd, "aborting command\n"); + list_for_each_entry(ncmd, haystack, list) + if (NCR5380_to_scmd(ncmd) == needle) + return true; + return false; +} - NCR5380_print_status(instance); +/** + * list_remove_cmd - remove a command from linked list + * @haystack: list of commands + * @needle: command to remove + */ - local_irq_save(flags); +static bool list_del_cmd(struct list_head *haystack, + struct scsi_cmnd *needle) +{ + if (list_find_cmd(haystack, needle)) { + struct NCR5380_cmd *ncmd = scsi_cmd_priv(needle); - dprintk(NDEBUG_ABORT, "scsi%d: abort called basr 0x%02x, sr 0x%02x\n", HOSTNO, - NCR5380_read(BUS_AND_STATUS_REG), - NCR5380_read(STATUS_REG)); + list_del(&ncmd->list); + return true; + } + return false; +} -#if 1 - /* - * Case 1 : If the command is the currently executing command, - * we'll set the aborted flag and return control so that - * information transfer routine can exit cleanly. - */ +/** + * NCR5380_abort - scsi host eh_abort_handler() method + * @cmd: the command to be aborted + * + * Try to abort a given command by removing it from queues and/or sending + * the target an abort message. This may not succeed in causing a target + * to abort the command. Nonetheless, the low-level driver must forget about + * the command because the mid-layer reclaims it and it may be re-issued. + * + * The normal path taken by a command is as follows. For EH we trace this + * same path to locate and abort the command. + * + * unissued -> selecting -> [unissued -> selecting ->]... connected -> + * [disconnected -> connected ->]... + * [autosense -> connected ->] done + * + * If cmd is unissued then just remove it. + * If cmd is disconnected, try to select the target. + * If cmd is connected, try to send an abort message. + * If cmd is waiting for autosense, give it a chance to complete but check + * that it isn't left connected. + * If cmd was not found at all then presumably it has already been completed, + * in which case return SUCCESS to try to avoid further EH measures. + * If the command has not completed yet, we must not fail to find it. + */ - if (hostdata->connected == cmd) { +static int NCR5380_abort(struct scsi_cmnd *cmd) +{ + struct Scsi_Host *instance = cmd->device->host; + struct NCR5380_hostdata *hostdata = shost_priv(instance); + unsigned long flags; + int result = SUCCESS; - dprintk(NDEBUG_ABORT, "scsi%d: aborting connected command\n", HOSTNO); - /* - * We should perform BSY checking, and make sure we haven't slipped - * into BUS FREE. - */ + spin_lock_irqsave(&hostdata->lock, flags); - /* NCR5380_write(INITIATOR_COMMAND_REG, ICR_ASSERT_ATN); */ - /* - * Since we can't change phases until we've completed the current - * handshake, we have to source or sink a byte of data if the current - * phase is not MSGOUT. - */ +#if (NDEBUG & NDEBUG_ANY) + scmd_printk(KERN_INFO, cmd, __func__); +#endif + NCR5380_dprint(NDEBUG_ANY, instance); + NCR5380_dprint_phase(NDEBUG_ANY, instance); - /* - * Return control to the executing NCR drive so we can clear the - * aborted flag and get back into our main loop. - */ + if (list_del_cmd(&hostdata->unissued, cmd)) { + dsprintk(NDEBUG_ABORT, instance, + "abort: removed %p from issue queue\n", cmd); + cmd->result = DID_ABORT << 16; + cmd->scsi_done(cmd); /* No tag or busy flag to worry about */ + } - if (do_abort(instance) == 0) { - hostdata->aborted = 1; - hostdata->connected = NULL; - cmd->result = DID_ABORT << 16; -#ifdef SUPPORT_TAGS - cmd_free_tag(cmd); -#else - hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); -#endif - maybe_release_dma_irq(instance); - local_irq_restore(flags); - cmd->scsi_done(cmd); - return SUCCESS; - } else { - local_irq_restore(flags); - printk("scsi%d: abort of connected command failed!\n", HOSTNO); - return FAILED; - } + if (hostdata->selecting == cmd) { + dsprintk(NDEBUG_ABORT, instance, + "abort: cmd %p == selecting\n", cmd); + hostdata->selecting = NULL; + cmd->result = DID_ABORT << 16; + complete_cmd(instance, cmd); + goto out; } -#endif - /* - * Case 2 : If the command hasn't been issued yet, we simply remove it - * from the issue queue. - */ - for (prev = (struct scsi_cmnd **)&(hostdata->issue_queue), - tmp = (struct scsi_cmnd *)hostdata->issue_queue; - tmp; prev = NEXTADDR(tmp), tmp = NEXT(tmp)) { - if (cmd == tmp) { - REMOVE(5, *prev, tmp, NEXT(tmp)); - (*prev) = NEXT(tmp); - SET_NEXT(tmp, NULL); - tmp->result = DID_ABORT << 16; - maybe_release_dma_irq(instance); - local_irq_restore(flags); - dprintk(NDEBUG_ABORT, "scsi%d: abort removed command from issue queue.\n", - HOSTNO); - /* Tagged queuing note: no tag to free here, hasn't been assigned - * yet... */ - tmp->scsi_done(tmp); - return SUCCESS; + if (list_del_cmd(&hostdata->disconnected, cmd)) { + dsprintk(NDEBUG_ABORT, instance, + "abort: removed %p from disconnected list\n", cmd); + cmd->result = DID_ERROR << 16; + if (!hostdata->connected) + NCR5380_select(instance, cmd); + if (hostdata->connected != cmd) { + complete_cmd(instance, cmd); + result = FAILED; + goto out; } } - /* - * Case 3 : If any commands are connected, we're going to fail the abort - * and let the high level SCSI driver retry at a later time or - * issue a reset. - * - * Timeouts, and therefore aborted commands, will be highly unlikely - * and handling them cleanly in this situation would make the common - * case of noresets less efficient, and would pollute our code. So, - * we fail. - */ + if (hostdata->connected == cmd) { + dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd); + hostdata->connected = NULL; + if (do_abort(instance)) { + set_host_byte(cmd, DID_ERROR); + complete_cmd(instance, cmd); + result = FAILED; + goto out; + } + set_host_byte(cmd, DID_ABORT); +#ifdef REAL_DMA + hostdata->dma_len = 0; +#endif + if (cmd->cmnd[0] == REQUEST_SENSE) + complete_cmd(instance, cmd); + else { + struct NCR5380_cmd *ncmd = scsi_cmd_priv(cmd); - if (hostdata->connected) { - local_irq_restore(flags); - dprintk(NDEBUG_ABORT, "scsi%d: abort failed, command connected.\n", HOSTNO); - return FAILED; + /* Perform autosense for this command */ + list_add(&ncmd->list, &hostdata->autosense); + } } - /* - * Case 4: If the command is currently disconnected from the bus, and - * there are no connected commands, we reconnect the I_T_L or - * I_T_L_Q nexus associated with it, go into message out, and send - * an abort message. - * - * This case is especially ugly. In order to reestablish the nexus, we - * need to call NCR5380_select(). The easiest way to implement this - * function was to abort if the bus was busy, and let the interrupt - * handler triggered on the SEL for reselect take care of lost arbitrations - * where necessary, meaning interrupts need to be enabled. - * - * When interrupts are enabled, the queues may change - so we - * can't remove it from the disconnected queue before selecting it - * because that could cause a failure in hashing the nexus if that - * device reselected. - * - * Since the queues may change, we can't use the pointers from when we - * first locate it. - * - * So, we must first locate the command, and if NCR5380_select() - * succeeds, then issue the abort, relocate the command and remove - * it from the disconnected queue. - */ - - for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp; - tmp = NEXT(tmp)) { - if (cmd == tmp) { - local_irq_restore(flags); - dprintk(NDEBUG_ABORT, "scsi%d: aborting disconnected command.\n", HOSTNO); - - if (NCR5380_select(instance, cmd)) - return FAILED; - - dprintk(NDEBUG_ABORT, "scsi%d: nexus reestablished.\n", HOSTNO); - - do_abort(instance); - - local_irq_save(flags); - for (prev = (struct scsi_cmnd **)&(hostdata->disconnected_queue), - tmp = (struct scsi_cmnd *)hostdata->disconnected_queue; - tmp; prev = NEXTADDR(tmp), tmp = NEXT(tmp)) { - if (cmd == tmp) { - REMOVE(5, *prev, tmp, NEXT(tmp)); - *prev = NEXT(tmp); - SET_NEXT(tmp, NULL); - tmp->result = DID_ABORT << 16; - /* We must unlock the tag/LUN immediately here, since the - * target goes to BUS FREE and doesn't send us another - * message (COMMAND_COMPLETE or the like) - */ -#ifdef SUPPORT_TAGS - cmd_free_tag(tmp); -#else - hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); -#endif - maybe_release_dma_irq(instance); - local_irq_restore(flags); - tmp->scsi_done(tmp); - return SUCCESS; - } - } + if (list_find_cmd(&hostdata->autosense, cmd)) { + dsprintk(NDEBUG_ABORT, instance, + "abort: found %p on sense queue\n", cmd); + spin_unlock_irqrestore(&hostdata->lock, flags); + queue_work(hostdata->work_q, &hostdata->main_task); + msleep(1000); + spin_lock_irqsave(&hostdata->lock, flags); + if (list_del_cmd(&hostdata->autosense, cmd)) { + dsprintk(NDEBUG_ABORT, instance, + "abort: removed %p from sense queue\n", cmd); + set_host_byte(cmd, DID_ABORT); + complete_cmd(instance, cmd); + goto out; } } - /* Maybe it is sufficient just to release the ST-DMA lock... (if - * possible at all) At least, we should check if the lock could be - * released after the abort, in case it is kept due to some bug. - */ - maybe_release_dma_irq(instance); - local_irq_restore(flags); + if (hostdata->connected == cmd) { + dsprintk(NDEBUG_ABORT, instance, "abort: cmd %p is connected\n", cmd); + hostdata->connected = NULL; + if (do_abort(instance)) { + set_host_byte(cmd, DID_ERROR); + complete_cmd(instance, cmd); + result = FAILED; + goto out; + } + set_host_byte(cmd, DID_ABORT); +#ifdef REAL_DMA + hostdata->dma_len = 0; +#endif + complete_cmd(instance, cmd); + } - /* - * Case 5 : If we reached this point, the command was not found in any of - * the queues. - * - * We probably reached this point because of an unlikely race condition - * between the command completing successfully and the abortion code, - * so we won't panic, but we will notify the user in case something really - * broke. - */ +out: + if (result == FAILED) + dsprintk(NDEBUG_ABORT, instance, "abort: failed to abort %p\n", cmd); + else + dsprintk(NDEBUG_ABORT, instance, "abort: successfully aborted %p\n", cmd); - printk(KERN_INFO "scsi%d: warning : SCSI command probably completed successfully before abortion\n", HOSTNO); + queue_work(hostdata->work_q, &hostdata->main_task); + maybe_release_dma_irq(instance); + spin_unlock_irqrestore(&hostdata->lock, flags); - return FAILED; + return result; } -/* - * Function : int NCR5380_reset (struct scsi_cmnd *cmd) - * - * Purpose : reset the SCSI bus. - * - * Returns : SUCCESS or FAILURE +/** + * NCR5380_bus_reset - reset the SCSI bus + * @cmd: SCSI command undergoing EH * + * Returns SUCCESS */ static int NCR5380_bus_reset(struct scsi_cmnd *cmd) @@ -2876,23 +2623,22 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd) struct NCR5380_hostdata *hostdata = shost_priv(instance); int i; unsigned long flags; + struct NCR5380_cmd *ncmd; - NCR5380_print_status(instance); + spin_lock_irqsave(&hostdata->lock, flags); + +#if (NDEBUG & NDEBUG_ANY) + scmd_printk(KERN_INFO, cmd, __func__); +#endif + NCR5380_dprint(NDEBUG_ANY, instance); + NCR5380_dprint_phase(NDEBUG_ANY, instance); + + do_reset(instance); - /* get in phase */ - NCR5380_write(TARGET_COMMAND_REG, - PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG))); - /* assert RST */ - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST); - udelay(40); /* reset NCR registers */ - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); NCR5380_write(MODE_REG, MR_BASE); NCR5380_write(TARGET_COMMAND_REG, 0); NCR5380_write(SELECT_ENABLE_REG, 0); - /* ++roman: reset interrupt condition! otherwise no interrupts don't get - * through anymore ... */ - (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG); /* After the reset, there are no more connected or disconnected commands * and no busy units; so clear the low-level status here to avoid @@ -2900,17 +2646,34 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd) * commands! */ - if (hostdata->issue_queue) - dprintk(NDEBUG_ABORT, "scsi%d: reset aborted issued command(s)\n", H_NO(cmd)); - if (hostdata->connected) - dprintk(NDEBUG_ABORT, "scsi%d: reset aborted a connected command\n", H_NO(cmd)); - if (hostdata->disconnected_queue) - dprintk(NDEBUG_ABORT, "scsi%d: reset aborted disconnected command(s)\n", H_NO(cmd)); + hostdata->selecting = NULL; + + list_for_each_entry(ncmd, &hostdata->disconnected, list) { + struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd); + + set_host_byte(cmd, DID_RESET); + cmd->scsi_done(cmd); + } + + list_for_each_entry(ncmd, &hostdata->autosense, list) { + struct scsi_cmnd *cmd = NCR5380_to_scmd(ncmd); + + set_host_byte(cmd, DID_RESET); + cmd->scsi_done(cmd); + } + + if (hostdata->connected) { + set_host_byte(hostdata->connected, DID_RESET); + complete_cmd(instance, hostdata->connected); + hostdata->connected = NULL; + } + + if (hostdata->sensing) { + set_host_byte(hostdata->connected, DID_RESET); + complete_cmd(instance, hostdata->sensing); + hostdata->sensing = NULL; + } - local_irq_save(flags); - hostdata->issue_queue = NULL; - hostdata->connected = NULL; - hostdata->disconnected_queue = NULL; #ifdef SUPPORT_TAGS free_all_tags(hostdata); #endif @@ -2920,8 +2683,9 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd) hostdata->dma_len = 0; #endif + queue_work(hostdata->work_q, &hostdata->main_task); maybe_release_dma_irq(instance); - local_irq_restore(flags); + spin_unlock_irqrestore(&hostdata->lock, flags); return SUCCESS; } diff --git a/drivers/scsi/atari_scsi.c b/drivers/scsi/atari_scsi.c index 5ede3daa93dc..78d1b2963f2c 100644 --- a/drivers/scsi/atari_scsi.c +++ b/drivers/scsi/atari_scsi.c @@ -66,7 +66,6 @@ #include <linux/module.h> #include <linux/types.h> -#include <linux/delay.h> #include <linux/blkdev.h> #include <linux/interrupt.h> #include <linux/init.h> @@ -98,7 +97,6 @@ #define NCR5380_queue_command atari_scsi_queue_command #define NCR5380_abort atari_scsi_abort -#define NCR5380_show_info atari_scsi_show_info #define NCR5380_info atari_scsi_info #define NCR5380_dma_read_setup(instance, data, count) \ @@ -161,23 +159,10 @@ static inline unsigned long SCSI_DMA_GETADR(void) return adr; } -#define HOSTDATA_DMALEN (((struct NCR5380_hostdata *) \ - (atari_scsi_host->hostdata))->dma_len) - -/* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms, - * we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more - * need ten times the standard value... */ -#ifndef CONFIG_ATARI_SCSI_TOSHIBA_DELAY -#define AFTER_RESET_DELAY (HZ/2) -#else -#define AFTER_RESET_DELAY (5*HZ/2) -#endif - #ifdef REAL_DMA static void atari_scsi_fetch_restbytes(void); #endif -static struct Scsi_Host *atari_scsi_host; static unsigned char (*atari_scsi_reg_read)(unsigned char reg); static void (*atari_scsi_reg_write)(unsigned char reg, unsigned char value); @@ -208,12 +193,12 @@ static int setup_cmd_per_lun = -1; module_param(setup_cmd_per_lun, int, 0); static int setup_sg_tablesize = -1; module_param(setup_sg_tablesize, int, 0); -#ifdef SUPPORT_TAGS static int setup_use_tagged_queuing = -1; module_param(setup_use_tagged_queuing, int, 0); -#endif static int setup_hostid = -1; module_param(setup_hostid, int, 0); +static int setup_toshiba_delay = -1; +module_param(setup_toshiba_delay, int, 0); #if defined(REAL_DMA) @@ -273,15 +258,17 @@ static void scsi_dma_buserr(int irq, void *dummy) #endif -static irqreturn_t scsi_tt_intr(int irq, void *dummy) +static irqreturn_t scsi_tt_intr(int irq, void *dev) { #ifdef REAL_DMA + struct Scsi_Host *instance = dev; + struct NCR5380_hostdata *hostdata = shost_priv(instance); int dma_stat; dma_stat = tt_scsi_dma.dma_ctrl; - dprintk(NDEBUG_INTR, "scsi%d: NCR5380 interrupt, DMA status = %02x\n", - atari_scsi_host->host_no, dma_stat & 0xff); + dsprintk(NDEBUG_INTR, instance, "NCR5380 interrupt, DMA status = %02x\n", + dma_stat & 0xff); /* Look if it was the DMA that has interrupted: First possibility * is that a bus error occurred... @@ -304,7 +291,8 @@ static irqreturn_t scsi_tt_intr(int irq, void *dummy) * data reg! */ if ((dma_stat & 0x02) && !(dma_stat & 0x40)) { - atari_dma_residual = HOSTDATA_DMALEN - (SCSI_DMA_READ_P(dma_addr) - atari_dma_startaddr); + atari_dma_residual = hostdata->dma_len - + (SCSI_DMA_READ_P(dma_addr) - atari_dma_startaddr); dprintk(NDEBUG_DMA, "SCSI DMA: There are %ld residual bytes.\n", atari_dma_residual); @@ -356,15 +344,17 @@ static irqreturn_t scsi_tt_intr(int irq, void *dummy) #endif /* REAL_DMA */ - NCR5380_intr(irq, dummy); + NCR5380_intr(irq, dev); return IRQ_HANDLED; } -static irqreturn_t scsi_falcon_intr(int irq, void *dummy) +static irqreturn_t scsi_falcon_intr(int irq, void *dev) { #ifdef REAL_DMA + struct Scsi_Host *instance = dev; + struct NCR5380_hostdata *hostdata = shost_priv(instance); int dma_stat; /* Turn off DMA and select sector counter register before @@ -399,7 +389,7 @@ static irqreturn_t scsi_falcon_intr(int irq, void *dummy) printk(KERN_ERR "SCSI DMA error: %ld bytes lost in " "ST-DMA fifo\n", transferred & 15); - atari_dma_residual = HOSTDATA_DMALEN - transferred; + atari_dma_residual = hostdata->dma_len - transferred; dprintk(NDEBUG_DMA, "SCSI DMA: There are %ld residual bytes.\n", atari_dma_residual); } else @@ -411,13 +401,14 @@ static irqreturn_t scsi_falcon_intr(int irq, void *dummy) * data to the original destination address. */ memcpy(atari_dma_orig_addr, phys_to_virt(atari_dma_startaddr), - HOSTDATA_DMALEN - atari_dma_residual); + hostdata->dma_len - atari_dma_residual); atari_dma_orig_addr = NULL; } #endif /* REAL_DMA */ - NCR5380_intr(irq, dummy); + NCR5380_intr(irq, dev); + return IRQ_HANDLED; } @@ -488,7 +479,7 @@ static int __init atari_scsi_setup(char *str) * Defaults depend on TT or Falcon, determined at run time. * Negative values mean don't change. */ - int ints[6]; + int ints[8]; get_options(str, ARRAY_SIZE(ints), ints); @@ -504,10 +495,11 @@ static int __init atari_scsi_setup(char *str) setup_sg_tablesize = ints[3]; if (ints[0] >= 4) setup_hostid = ints[4]; -#ifdef SUPPORT_TAGS if (ints[0] >= 5) setup_use_tagged_queuing = ints[5]; -#endif + /* ints[6] (use_pdma) is ignored */ + if (ints[0] >= 7) + setup_toshiba_delay = ints[7]; return 1; } @@ -516,38 +508,6 @@ __setup("atascsi=", atari_scsi_setup); #endif /* !MODULE */ -#ifdef CONFIG_ATARI_SCSI_RESET_BOOT -static void __init atari_scsi_reset_boot(void) -{ - unsigned long end; - - /* - * Do a SCSI reset to clean up the bus during initialization. No messing - * with the queues, interrupts, or locks necessary here. - */ - - printk("Atari SCSI: resetting the SCSI bus..."); - - /* get in phase */ - NCR5380_write(TARGET_COMMAND_REG, - PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG))); - - /* assert RST */ - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST); - /* The min. reset hold time is 25us, so 40us should be enough */ - udelay(50); - /* reset RST and interrupt */ - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - NCR5380_read(RESET_PARITY_INTERRUPT_REG); - - end = jiffies + AFTER_RESET_DELAY; - while (time_before(jiffies, end)) - barrier(); - - printk(" done\n"); -} -#endif - #if defined(REAL_DMA) static unsigned long atari_scsi_dma_setup(struct Scsi_Host *instance, @@ -815,14 +775,14 @@ static int atari_scsi_bus_reset(struct scsi_cmnd *cmd) static struct scsi_host_template atari_scsi_template = { .module = THIS_MODULE, .proc_name = DRV_MODULE_NAME, - .show_info = atari_scsi_show_info, .name = "Atari native SCSI", .info = atari_scsi_info, .queuecommand = atari_scsi_queue_command, .eh_abort_handler = atari_scsi_abort, .eh_bus_reset_handler = atari_scsi_bus_reset, .this_id = 7, - .use_clustering = DISABLE_CLUSTERING + .use_clustering = DISABLE_CLUSTERING, + .cmd_size = NCR5380_CMD_SIZE, }; static int __init atari_scsi_probe(struct platform_device *pdev) @@ -880,7 +840,7 @@ static int __init atari_scsi_probe(struct platform_device *pdev) } else { /* Test if a host id is set in the NVRam */ if (ATARIHW_PRESENT(TT_CLK) && nvram_check_checksum()) { - unsigned char b = nvram_read_byte(14); + unsigned char b = nvram_read_byte(16); /* Arbitration enabled? (for TOS) * If yes, use configured host ID @@ -915,21 +875,18 @@ static int __init atari_scsi_probe(struct platform_device *pdev) error = -ENOMEM; goto fail_alloc; } - atari_scsi_host = instance; - -#ifdef CONFIG_ATARI_SCSI_RESET_BOOT - atari_scsi_reset_boot(); -#endif instance->irq = irq->start; host_flags |= IS_A_TT() ? 0 : FLAG_LATE_DMA_SETUP; - #ifdef SUPPORT_TAGS host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0; #endif + host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0; - NCR5380_init(instance, host_flags); + error = NCR5380_init(instance, host_flags); + if (error) + goto fail_init; if (IS_A_TT()) { error = request_irq(instance->irq, scsi_tt_intr, 0, @@ -975,6 +932,8 @@ static int __init atari_scsi_probe(struct platform_device *pdev) #endif } + NCR5380_maybe_reset_bus(instance); + error = scsi_add_host(instance, NULL); if (error) goto fail_host; @@ -989,6 +948,7 @@ fail_host: free_irq(instance->irq, instance); fail_irq: NCR5380_exit(instance); +fail_init: scsi_host_put(instance); fail_alloc: if (atari_dma_buffer) diff --git a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c index 0e2bee937fe8..e22a268fd311 100644 --- a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c +++ b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c @@ -57,7 +57,7 @@ MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)"); static int cxgb3i_rx_credit_thres = 10 * 1024; module_param(cxgb3i_rx_credit_thres, int, 0644); -MODULE_PARM_DESC(rx_credit_thres, +MODULE_PARM_DESC(cxgb3i_rx_credit_thres, "RX credits return threshold in bytes (default=10KB)"); static unsigned int cxgb3i_max_connect = 8 * 1024; diff --git a/drivers/scsi/dmx3191d.c b/drivers/scsi/dmx3191d.c index 3e088125a8be..6c14e68b9e1a 100644 --- a/drivers/scsi/dmx3191d.c +++ b/drivers/scsi/dmx3191d.c @@ -36,17 +36,10 @@ #define DONT_USE_INTR -#define NCR5380_read(reg) inb(port + reg) -#define NCR5380_write(reg, value) outb(value, port + reg) +#define NCR5380_read(reg) inb(instance->io_port + reg) +#define NCR5380_write(reg, value) outb(value, instance->io_port + reg) #define NCR5380_implementation_fields /* none */ -#define NCR5380_local_declare() unsigned int port -#define NCR5380_setup(instance) port = instance->io_port - -/* - * Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h) - */ -#include <linux/delay.h> #include "NCR5380.h" #include "NCR5380.c" @@ -56,6 +49,7 @@ static struct scsi_host_template dmx3191d_driver_template = { + .module = THIS_MODULE, .proc_name = DMX3191D_DRIVER_NAME, .name = "Domex DMX3191D", .info = NCR5380_info, @@ -67,6 +61,8 @@ static struct scsi_host_template dmx3191d_driver_template = { .sg_tablesize = SG_ALL, .cmd_per_lun = 2, .use_clustering = DISABLE_CLUSTERING, + .cmd_size = NCR5380_CMD_SIZE, + .max_sectors = 128, }; static int dmx3191d_probe_one(struct pci_dev *pdev, @@ -97,17 +93,25 @@ static int dmx3191d_probe_one(struct pci_dev *pdev, */ shost->irq = NO_IRQ; - NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E); + error = NCR5380_init(shost, FLAG_NO_PSEUDO_DMA); + if (error) + goto out_host_put; + + NCR5380_maybe_reset_bus(shost); pci_set_drvdata(pdev, shost); error = scsi_add_host(shost, &pdev->dev); if (error) - goto out_release_region; + goto out_exit; scsi_scan_host(shost); return 0; +out_exit: + NCR5380_exit(shost); +out_host_put: + scsi_host_put(shost); out_release_region: release_region(io, DMX3191D_REGION_LEN); out_disable_device: @@ -119,15 +123,14 @@ static int dmx3191d_probe_one(struct pci_dev *pdev, static void dmx3191d_remove_one(struct pci_dev *pdev) { struct Scsi_Host *shost = pci_get_drvdata(pdev); + unsigned long io = shost->io_port; scsi_remove_host(shost); NCR5380_exit(shost); - - release_region(shost->io_port, DMX3191D_REGION_LEN); - pci_disable_device(pdev); - scsi_host_put(shost); + release_region(io, DMX3191D_REGION_LEN); + pci_disable_device(pdev); } static struct pci_device_id dmx3191d_pci_tbl[] = { diff --git a/drivers/scsi/dtc.c b/drivers/scsi/dtc.c index 4c74c7ba2dff..6c736b071cf4 100644 --- a/drivers/scsi/dtc.c +++ b/drivers/scsi/dtc.c @@ -1,9 +1,5 @@ - #define PSEUDO_DMA #define DONT_USE_INTR -#define UNSAFE /* Leave interrupts enabled during pseudo-dma I/O */ -#define DMA_WORKS_RIGHT - /* * DTC 3180/3280 driver, by @@ -50,15 +46,13 @@ #include <linux/module.h> -#include <linux/signal.h> #include <linux/blkdev.h> -#include <linux/delay.h> -#include <linux/stat.h> #include <linux/string.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/io.h> #include <scsi/scsi_host.h> + #include "dtc.h" #define AUTOPROBE_IRQ #include "NCR5380.h" @@ -150,7 +144,7 @@ static const struct signature { static int __init dtc_setup(char *str) { - static int commandline_current = 0; + static int commandline_current; int i; int ints[10]; @@ -188,7 +182,7 @@ __setup("dtc=", dtc_setup); static int __init dtc_detect(struct scsi_host_template * tpnt) { - static int current_override = 0, current_base = 0; + static int current_override, current_base; struct Scsi_Host *instance; unsigned int addr; void __iomem *base; @@ -205,9 +199,8 @@ static int __init dtc_detect(struct scsi_host_template * tpnt) addr = 0; } else for (; !addr && (current_base < NO_BASES); ++current_base) { -#if (DTCDEBUG & DTCDEBUG_INIT) - printk(KERN_DEBUG "scsi-dtc : probing address %08x\n", bases[current_base].address); -#endif + dprintk(NDEBUG_INIT, "dtc: probing address 0x%08x\n", + (unsigned int)bases[current_base].address); if (bases[current_base].noauto) continue; base = ioremap(bases[current_base].address, 0x2000); @@ -216,18 +209,14 @@ static int __init dtc_detect(struct scsi_host_template * tpnt) for (sig = 0; sig < NO_SIGNATURES; ++sig) { if (check_signature(base + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) { addr = bases[current_base].address; -#if (DTCDEBUG & DTCDEBUG_INIT) - printk(KERN_DEBUG "scsi-dtc : detected board.\n"); -#endif + dprintk(NDEBUG_INIT, "dtc: detected board\n"); goto found; } } iounmap(base); } -#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT) - printk(KERN_DEBUG "scsi-dtc : base = %08x\n", addr); -#endif + dprintk(NDEBUG_INIT, "dtc: addr = 0x%08x\n", addr); if (!addr) break; @@ -235,12 +224,15 @@ static int __init dtc_detect(struct scsi_host_template * tpnt) found: instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); if (instance == NULL) - break; + goto out_unmap; instance->base = addr; ((struct NCR5380_hostdata *)(instance)->hostdata)->base = base; - NCR5380_init(instance, 0); + if (NCR5380_init(instance, FLAG_NO_DMA_FIXUP)) + goto out_unregister; + + NCR5380_maybe_reset_bus(instance); NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */ if (overrides[current_override].irq != IRQ_AUTO) @@ -271,14 +263,19 @@ found: printk(KERN_WARNING "scsi%d : interrupts not used. Might as well not jumper it.\n", instance->host_no); instance->irq = NO_IRQ; #endif -#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT) - printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); -#endif + dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n", + instance->host_no, instance->irq); ++current_override; ++count; } return count; + +out_unregister: + scsi_unregister(instance); +out_unmap: + iounmap(base); + return count; } /* @@ -331,12 +328,8 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, unsigned char *d = dst; int i; /* For counting time spent in the poll-loop */ struct NCR5380_hostdata *hostdata = shost_priv(instance); - NCR5380_local_declare(); - NCR5380_setup(instance); i = 0; - NCR5380_read(RESET_PARITY_INTERRUPT_REG); - NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE); if (instance->irq == NO_IRQ) NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ); else @@ -348,7 +341,7 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) ++i; rtrc(3); - memcpy_fromio(d, base + DTC_DATA_BUF, 128); + memcpy_fromio(d, hostdata->base + DTC_DATA_BUF, 128); d += 128; len -= 128; rtrc(7); @@ -358,9 +351,7 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, rtrc(4); while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) ++i; - NCR5380_write(MODE_REG, 0); /* Clear the operating mode */ rtrc(0); - NCR5380_read(RESET_PARITY_INTERRUPT_REG); if (i > hostdata->spin_max_r) hostdata->spin_max_r = i; return (0); @@ -383,12 +374,7 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, { int i; struct NCR5380_hostdata *hostdata = shost_priv(instance); - NCR5380_local_declare(); - NCR5380_setup(instance); - NCR5380_read(RESET_PARITY_INTERRUPT_REG); - NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE); - /* set direction (write) */ if (instance->irq == NO_IRQ) NCR5380_write(DTC_CONTROL_REG, 0); else @@ -400,7 +386,7 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) ++i; rtrc(3); - memcpy_toio(base + DTC_DATA_BUF, src, 128); + memcpy_toio(hostdata->base + DTC_DATA_BUF, src, 128); src += 128; len -= 128; } @@ -413,47 +399,60 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, ++i; rtrc(7); /* Check for parity error here. fixme. */ - NCR5380_write(MODE_REG, 0); /* Clear the operating mode */ rtrc(0); if (i > hostdata->spin_max_w) hostdata->spin_max_w = i; return (0); } +static int dtc_dma_xfer_len(struct scsi_cmnd *cmd) +{ + int transfersize = cmd->transfersize; + + /* Limit transfers to 32K, for xx400 & xx406 + * pseudoDMA that transfers in 128 bytes blocks. + */ + if (transfersize > 32 * 1024 && cmd->SCp.this_residual && + !(cmd->SCp.this_residual % transfersize)) + transfersize = 32 * 1024; + + return transfersize; +} + MODULE_LICENSE("GPL"); #include "NCR5380.c" static int dtc_release(struct Scsi_Host *shost) { - NCR5380_local_declare(); - NCR5380_setup(shost); + struct NCR5380_hostdata *hostdata = shost_priv(shost); + if (shost->irq != NO_IRQ) free_irq(shost->irq, shost); NCR5380_exit(shost); - if (shost->io_port && shost->n_io_port) - release_region(shost->io_port, shost->n_io_port); scsi_unregister(shost); - iounmap(base); + iounmap(hostdata->base); return 0; } static struct scsi_host_template driver_template = { - .name = "DTC 3180/3280 ", - .detect = dtc_detect, - .release = dtc_release, - .proc_name = "dtc3x80", - .show_info = dtc_show_info, - .write_info = dtc_write_info, - .info = dtc_info, - .queuecommand = dtc_queue_command, - .eh_abort_handler = dtc_abort, - .eh_bus_reset_handler = dtc_bus_reset, - .bios_param = dtc_biosparam, - .can_queue = CAN_QUEUE, - .this_id = 7, - .sg_tablesize = SG_ALL, - .cmd_per_lun = CMD_PER_LUN, - .use_clustering = DISABLE_CLUSTERING, + .name = "DTC 3180/3280", + .detect = dtc_detect, + .release = dtc_release, + .proc_name = "dtc3x80", + .show_info = dtc_show_info, + .write_info = dtc_write_info, + .info = dtc_info, + .queuecommand = dtc_queue_command, + .eh_abort_handler = dtc_abort, + .eh_bus_reset_handler = dtc_bus_reset, + .bios_param = dtc_biosparam, + .can_queue = 32, + .this_id = 7, + .sg_tablesize = SG_ALL, + .cmd_per_lun = 2, + .use_clustering = DISABLE_CLUSTERING, + .cmd_size = NCR5380_CMD_SIZE, + .max_sectors = 128, }; #include "scsi_module.c" diff --git a/drivers/scsi/dtc.h b/drivers/scsi/dtc.h index 78a2332e9064..56732cba8aba 100644 --- a/drivers/scsi/dtc.h +++ b/drivers/scsi/dtc.h @@ -10,54 +10,17 @@ #ifndef DTC3280_H #define DTC3280_H -#define DTCDEBUG 0 -#define DTCDEBUG_INIT 0x1 -#define DTCDEBUG_TRANSFER 0x2 - -#ifndef CMD_PER_LUN -#define CMD_PER_LUN 2 -#endif - -#ifndef CAN_QUEUE -#define CAN_QUEUE 32 -#endif - #define NCR5380_implementation_fields \ void __iomem *base -#define NCR5380_local_declare() \ - void __iomem *base - -#define NCR5380_setup(instance) \ - base = ((struct NCR5380_hostdata *)(instance)->hostdata)->base +#define DTC_address(reg) \ + (((struct NCR5380_hostdata *)shost_priv(instance))->base + DTC_5380_OFFSET + reg) -#define DTC_address(reg) (base + DTC_5380_OFFSET + reg) - -#define dbNCR5380_read(reg) \ - (rval=readb(DTC_address(reg)), \ - (((unsigned char) printk("DTC : read register %d at addr %p is: %02x\n"\ - , (reg), DTC_address(reg), rval)), rval ) ) - -#define dbNCR5380_write(reg, value) do { \ - printk("DTC : write %02x to register %d at address %p\n", \ - (value), (reg), DTC_address(reg)); \ - writeb(value, DTC_address(reg));} while(0) - - -#if !(DTCDEBUG & DTCDEBUG_TRANSFER) #define NCR5380_read(reg) (readb(DTC_address(reg))) #define NCR5380_write(reg, value) (writeb(value, DTC_address(reg))) -#else -#define NCR5380_read(reg) (readb(DTC_address(reg))) -#define xNCR5380_read(reg) \ - (((unsigned char) printk("DTC : read register %d at address %p\n"\ - , (reg), DTC_address(reg))), readb(DTC_address(reg))) -#define NCR5380_write(reg, value) do { \ - printk("DTC : write %02x to register %d at address %p\n", \ - (value), (reg), DTC_address(reg)); \ - writeb(value, DTC_address(reg));} while(0) -#endif +#define NCR5380_dma_xfer_len(instance, cmd, phase) \ + dtc_dma_xfer_len(cmd) #define NCR5380_intr dtc_intr #define NCR5380_queue_command dtc_queue_command diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c index f8d2478b11cc..90091e693020 100644 --- a/drivers/scsi/g_NCR5380.c +++ b/drivers/scsi/g_NCR5380.c @@ -56,40 +56,31 @@ * */ -/* settings for DTC3181E card with only Mustek scanner attached */ -#define USLEEP_POLL msecs_to_jiffies(10) -#define USLEEP_SLEEP msecs_to_jiffies(200) -#define USLEEP_WAITLONG msecs_to_jiffies(5000) - #define AUTOPROBE_IRQ #ifdef CONFIG_SCSI_GENERIC_NCR53C400 -#define NCR53C400_PSEUDO_DMA 1 #define PSEUDO_DMA -#define NCR53C400 #endif #include <asm/io.h> -#include <linux/signal.h> #include <linux/blkdev.h> +#include <linux/module.h> #include <scsi/scsi_host.h> #include "g_NCR5380.h" #include "NCR5380.h" -#include <linux/stat.h> #include <linux/init.h> #include <linux/ioport.h> #include <linux/isapnp.h> -#include <linux/delay.h> #include <linux/interrupt.h> -#define NCR_NOT_SET 0 -static int ncr_irq = NCR_NOT_SET; -static int ncr_dma = NCR_NOT_SET; -static int ncr_addr = NCR_NOT_SET; -static int ncr_5380 = NCR_NOT_SET; -static int ncr_53c400 = NCR_NOT_SET; -static int ncr_53c400a = NCR_NOT_SET; -static int dtc_3181e = NCR_NOT_SET; +static int ncr_irq; +static int ncr_dma; +static int ncr_addr; +static int ncr_5380; +static int ncr_53c400; +static int ncr_53c400a; +static int dtc_3181e; +static int hp_c2502; static struct override { NCR5380_map_type NCR5380_map_name; @@ -121,7 +112,7 @@ static struct override { static void __init internal_setup(int board, char *str, int *ints) { - static int commandline_current = 0; + static int commandline_current; switch (board) { case BOARD_NCR5380: if (ints[0] != 2 && ints[0] != 3) { @@ -235,6 +226,30 @@ static int __init do_DTC3181E_setup(char *str) #endif +#ifndef SCSI_G_NCR5380_MEM +/* + * Configure I/O address of 53C400A or DTC436 by writing magic numbers + * to ports 0x779 and 0x379. + */ +static void magic_configure(int idx, u8 irq, u8 magic[]) +{ + u8 cfg = 0; + + outb(magic[0], 0x779); + outb(magic[1], 0x379); + outb(magic[2], 0x379); + outb(magic[3], 0x379); + outb(magic[4], 0x379); + + /* allowed IRQs for HP C2502 */ + if (irq != 2 && irq != 3 && irq != 4 && irq != 5 && irq != 7) + irq = 0; + if (idx >= 0 && idx <= 7) + cfg = 0x80 | idx | (irq << 4); + outb(cfg, 0x379); +} +#endif + /** * generic_NCR5380_detect - look for NCR5380 controllers * @tpnt: the scsi template @@ -243,19 +258,18 @@ static int __init do_DTC3181E_setup(char *str) * and DTC436(ISAPnP) controllers. If overrides have been set we use * them. * - * The caller supplied NCR5380_init function is invoked from here, before - * the interrupt line is taken. - * * Locks: none */ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) { - static int current_override = 0; + static int current_override; int count; unsigned int *ports; + u8 *magic = NULL; #ifndef SCSI_G_NCR5380_MEM int i; + int port_idx = -1; unsigned long region_size = 16; #endif static unsigned int __initdata ncr_53c400a_ports[] = { @@ -264,27 +278,36 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) static unsigned int __initdata dtc_3181e_ports[] = { 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0 }; - int flags = 0; + static u8 ncr_53c400a_magic[] __initdata = { /* 53C400A & DTC436 */ + 0x59, 0xb9, 0xc5, 0xae, 0xa6 + }; + static u8 hp_c2502_magic[] __initdata = { /* HP C2502 */ + 0x0f, 0x22, 0xf0, 0x20, 0x80 + }; + int flags; struct Scsi_Host *instance; + struct NCR5380_hostdata *hostdata; #ifdef SCSI_G_NCR5380_MEM unsigned long base; void __iomem *iomem; #endif - if (ncr_irq != NCR_NOT_SET) + if (ncr_irq) overrides[0].irq = ncr_irq; - if (ncr_dma != NCR_NOT_SET) + if (ncr_dma) overrides[0].dma = ncr_dma; - if (ncr_addr != NCR_NOT_SET) + if (ncr_addr) overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr; - if (ncr_5380 != NCR_NOT_SET) + if (ncr_5380) overrides[0].board = BOARD_NCR5380; - else if (ncr_53c400 != NCR_NOT_SET) + else if (ncr_53c400) overrides[0].board = BOARD_NCR53C400; - else if (ncr_53c400a != NCR_NOT_SET) + else if (ncr_53c400a) overrides[0].board = BOARD_NCR53C400A; - else if (dtc_3181e != NCR_NOT_SET) + else if (dtc_3181e) overrides[0].board = BOARD_DTC3181E; + else if (hp_c2502) + overrides[0].board = BOARD_HP_C2502; #ifndef SCSI_G_NCR5380_MEM if (!current_override && isapnp_present()) { struct pnp_dev *dev = NULL; @@ -318,41 +341,45 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) } } #endif - tpnt->proc_name = "g_NCR5380"; for (count = 0; current_override < NO_OVERRIDES; ++current_override) { if (!(overrides[current_override].NCR5380_map_name)) continue; ports = NULL; + flags = 0; switch (overrides[current_override].board) { case BOARD_NCR5380: flags = FLAG_NO_PSEUDO_DMA; break; case BOARD_NCR53C400: - flags = FLAG_NCR53C400; +#ifdef PSEUDO_DMA + flags = FLAG_NO_DMA_FIXUP; +#endif break; case BOARD_NCR53C400A: - flags = FLAG_NO_PSEUDO_DMA; + flags = FLAG_NO_DMA_FIXUP; + ports = ncr_53c400a_ports; + magic = ncr_53c400a_magic; + break; + case BOARD_HP_C2502: + flags = FLAG_NO_DMA_FIXUP; ports = ncr_53c400a_ports; + magic = hp_c2502_magic; break; case BOARD_DTC3181E: - flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E; + flags = FLAG_NO_DMA_FIXUP; ports = dtc_3181e_ports; + magic = ncr_53c400a_magic; break; } #ifndef SCSI_G_NCR5380_MEM - if (ports) { + if (ports && magic) { /* wakeup sequence for the NCR53C400A and DTC3181E */ /* Disable the adapter and look for a free io port */ - outb(0x59, 0x779); - outb(0xb9, 0x379); - outb(0xc5, 0x379); - outb(0xae, 0x379); - outb(0xa6, 0x379); - outb(0x00, 0x379); + magic_configure(-1, 0, magic); if (overrides[current_override].NCR5380_map_name != PORT_AUTO) for (i = 0; ports[i]; i++) { @@ -371,17 +398,12 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) } if (ports[i]) { /* At this point we have our region reserved */ - outb(0x59, 0x779); - outb(0xb9, 0x379); - outb(0xc5, 0x379); - outb(0xae, 0x379); - outb(0xa6, 0x379); - outb(0x80 | i, 0x379); /* set io port to be used */ + magic_configure(i, 0, magic); /* no IRQ yet */ outb(0xc0, ports[i] + 9); if (inb(ports[i] + 9) != 0x80) continue; - else - overrides[current_override].NCR5380_map_name = ports[i]; + overrides[current_override].NCR5380_map_name = ports[i]; + port_idx = i; } else continue; } @@ -403,24 +425,65 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) } #endif instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); - if (instance == NULL) { -#ifndef SCSI_G_NCR5380_MEM - release_region(overrides[current_override].NCR5380_map_name, region_size); -#else - iounmap(iomem); - release_mem_region(base, NCR5380_region_size); -#endif - continue; - } + if (instance == NULL) + goto out_release; + hostdata = shost_priv(instance); - instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name; #ifndef SCSI_G_NCR5380_MEM + instance->io_port = overrides[current_override].NCR5380_map_name; instance->n_io_port = region_size; + hostdata->io_width = 1; /* 8-bit PDMA by default */ + + /* + * On NCR53C400 boards, NCR5380 registers are mapped 8 past + * the base address. + */ + switch (overrides[current_override].board) { + case BOARD_NCR53C400: + instance->io_port += 8; + hostdata->c400_ctl_status = 0; + hostdata->c400_blk_cnt = 1; + hostdata->c400_host_buf = 4; + break; + case BOARD_DTC3181E: + hostdata->io_width = 2; /* 16-bit PDMA */ + /* fall through */ + case BOARD_NCR53C400A: + case BOARD_HP_C2502: + hostdata->c400_ctl_status = 9; + hostdata->c400_blk_cnt = 10; + hostdata->c400_host_buf = 8; + break; + } #else - ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem; + instance->base = overrides[current_override].NCR5380_map_name; + hostdata->iomem = iomem; + switch (overrides[current_override].board) { + case BOARD_NCR53C400: + hostdata->c400_ctl_status = 0x100; + hostdata->c400_blk_cnt = 0x101; + hostdata->c400_host_buf = 0x104; + break; + case BOARD_DTC3181E: + case BOARD_NCR53C400A: + case BOARD_HP_C2502: + pr_err(DRV_MODULE_NAME ": unknown register offsets\n"); + goto out_unregister; + } #endif - NCR5380_init(instance, flags); + if (NCR5380_init(instance, flags)) + goto out_unregister; + + switch (overrides[current_override].board) { + case BOARD_NCR53C400: + case BOARD_DTC3181E: + case BOARD_NCR53C400A: + case BOARD_HP_C2502: + NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); + } + + NCR5380_maybe_reset_bus(instance); if (overrides[current_override].irq != IRQ_AUTO) instance->irq = overrides[current_override].irq; @@ -431,12 +494,18 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) if (instance->irq == 255) instance->irq = NO_IRQ; - if (instance->irq != NO_IRQ) + if (instance->irq != NO_IRQ) { +#ifndef SCSI_G_NCR5380_MEM + /* set IRQ for HP C2502 */ + if (overrides[current_override].board == BOARD_HP_C2502) + magic_configure(port_idx, instance->irq, magic); +#endif if (request_irq(instance->irq, generic_NCR5380_intr, 0, "NCR5380", instance)) { printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); instance->irq = NO_IRQ; } + } if (instance->irq == NO_IRQ) { printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); @@ -447,6 +516,17 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) ++count; } return count; + +out_unregister: + scsi_unregister(instance); +out_release: +#ifndef SCSI_G_NCR5380_MEM + release_region(overrides[current_override].NCR5380_map_name, region_size); +#else + iounmap(iomem); + release_mem_region(base, NCR5380_region_size); +#endif + return count; } /** @@ -460,21 +540,15 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) static int generic_NCR5380_release_resources(struct Scsi_Host *instance) { - NCR5380_local_declare(); - NCR5380_setup(instance); - if (instance->irq != NO_IRQ) free_irq(instance->irq, instance); NCR5380_exit(instance); - #ifndef SCSI_G_NCR5380_MEM - release_region(instance->NCR5380_instance_name, instance->n_io_port); + release_region(instance->io_port, instance->n_io_port); #else iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem); - release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size); + release_mem_region(instance->base, NCR5380_region_size); #endif - - return 0; } @@ -507,7 +581,7 @@ generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev, } #endif -#ifdef NCR53C400_PSEUDO_DMA +#ifdef PSEUDO_DMA /** * NCR5380_pread - pseudo DMA read @@ -521,75 +595,68 @@ generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev, static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len) { + struct NCR5380_hostdata *hostdata = shost_priv(instance); int blocks = len / 128; int start = 0; - int bl; - - NCR5380_local_declare(); - NCR5380_setup(instance); - NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR); - NCR5380_write(C400_BLOCK_COUNTER_REG, blocks); + NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR); + NCR5380_write(hostdata->c400_blk_cnt, blocks); while (1) { - if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) { + if (NCR5380_read(hostdata->c400_blk_cnt) == 0) break; - } - if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) { + if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) { printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks); return -1; } - while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY); + while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) + ; /* FIXME - no timeout */ #ifndef SCSI_G_NCR5380_MEM - { - int i; - for (i = 0; i < 128; i++) - dst[start + i] = NCR5380_read(C400_HOST_BUFFER); - } + if (hostdata->io_width == 2) + insw(instance->io_port + hostdata->c400_host_buf, + dst + start, 64); + else + insb(instance->io_port + hostdata->c400_host_buf, + dst + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ - memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128); + memcpy_fromio(dst + start, + hostdata->iomem + NCR53C400_host_buffer, 128); #endif start += 128; blocks--; } if (blocks) { - while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY) - { - // FIXME - no timeout - } + while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) + ; /* FIXME - no timeout */ #ifndef SCSI_G_NCR5380_MEM - { - int i; - for (i = 0; i < 128; i++) - dst[start + i] = NCR5380_read(C400_HOST_BUFFER); - } + if (hostdata->io_width == 2) + insw(instance->io_port + hostdata->c400_host_buf, + dst + start, 64); + else + insb(instance->io_port + hostdata->c400_host_buf, + dst + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ - memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128); + memcpy_fromio(dst + start, + hostdata->iomem + NCR53C400_host_buffer, 128); #endif start += 128; blocks--; } - if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ)) + if (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ)) printk("53C400r: no 53C80 gated irq after transfer"); -#if 0 - /* - * DON'T DO THIS - THEY NEVER ARRIVE! - */ - printk("53C400r: Waiting for 53C80 registers\n"); - while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG) + /* wait for 53C80 registers to be available */ + while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)) ; -#endif + if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) printk(KERN_ERR "53C400r: no end dma signal\n"); - NCR5380_write(MODE_REG, MR_BASE); - NCR5380_read(RESET_PARITY_INTERRUPT_REG); return 0; } @@ -605,89 +672,91 @@ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len) { + struct NCR5380_hostdata *hostdata = shost_priv(instance); int blocks = len / 128; int start = 0; - int bl; - int i; - NCR5380_local_declare(); - NCR5380_setup(instance); - - NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE); - NCR5380_write(C400_BLOCK_COUNTER_REG, blocks); + NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); + NCR5380_write(hostdata->c400_blk_cnt, blocks); while (1) { - if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) { + if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) { printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks); return -1; } - if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) { + if (NCR5380_read(hostdata->c400_blk_cnt) == 0) break; - } - while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY) + while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; // FIXME - timeout #ifndef SCSI_G_NCR5380_MEM - { - for (i = 0; i < 128; i++) - NCR5380_write(C400_HOST_BUFFER, src[start + i]); - } + if (hostdata->io_width == 2) + outsw(instance->io_port + hostdata->c400_host_buf, + src + start, 64); + else + outsb(instance->io_port + hostdata->c400_host_buf, + src + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ - memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128); + memcpy_toio(hostdata->iomem + NCR53C400_host_buffer, + src + start, 128); #endif start += 128; blocks--; } if (blocks) { - while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY) + while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; // FIXME - no timeout #ifndef SCSI_G_NCR5380_MEM - { - for (i = 0; i < 128; i++) - NCR5380_write(C400_HOST_BUFFER, src[start + i]); - } + if (hostdata->io_width == 2) + outsw(instance->io_port + hostdata->c400_host_buf, + src + start, 64); + else + outsb(instance->io_port + hostdata->c400_host_buf, + src + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ - memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128); + memcpy_toio(hostdata->iomem + NCR53C400_host_buffer, + src + start, 128); #endif start += 128; blocks--; } -#if 0 - printk("53C400w: waiting for registers to be available\n"); - THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG); - printk("53C400w: Got em\n"); -#endif - - /* Let's wait for this instead - could be ugly */ - /* All documentation says to check for this. Maybe my hardware is too - * fast. Waiting for it seems to work fine! KLL - */ - while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ)) - ; // FIXME - no timeout - - /* - * I know. i is certainly != 0 here but the loop is new. See previous - * comment. - */ - if (i) { - if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER)) - printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i); - } else - printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n"); + /* wait for 53C80 registers to be available */ + while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)) { + udelay(4); /* DTC436 chip hangs without this */ + /* FIXME - no timeout */ + } -#if 0 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) { printk(KERN_ERR "53C400w: no end dma signal\n"); } -#endif + while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT)) ; // TIMEOUT return 0; } -#endif /* PSEUDO_DMA */ + +static int generic_NCR5380_dma_xfer_len(struct scsi_cmnd *cmd) +{ + int transfersize = cmd->transfersize; + + /* Limit transfers to 32K, for xx400 & xx406 + * pseudoDMA that transfers in 128 bytes blocks. + */ + if (transfersize > 32 * 1024 && cmd->SCp.this_residual && + !(cmd->SCp.this_residual % transfersize)) + transfersize = 32 * 1024; + + /* 53C400 datasheet: non-modulo-128-byte transfers should use PIO */ + if (transfersize % 128) + transfersize = 0; + + return transfersize; +} + +#endif /* PSEUDO_DMA */ /* * Include the NCR5380 core code that we build our driver around @@ -696,22 +765,24 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, #include "NCR5380.c" static struct scsi_host_template driver_template = { - .show_info = generic_NCR5380_show_info, - .name = "Generic NCR5380/NCR53C400 SCSI", - .detect = generic_NCR5380_detect, - .release = generic_NCR5380_release_resources, - .info = generic_NCR5380_info, - .queuecommand = generic_NCR5380_queue_command, + .proc_name = DRV_MODULE_NAME, + .name = "Generic NCR5380/NCR53C400 SCSI", + .detect = generic_NCR5380_detect, + .release = generic_NCR5380_release_resources, + .info = generic_NCR5380_info, + .queuecommand = generic_NCR5380_queue_command, .eh_abort_handler = generic_NCR5380_abort, .eh_bus_reset_handler = generic_NCR5380_bus_reset, - .bios_param = NCR5380_BIOSPARAM, - .can_queue = CAN_QUEUE, - .this_id = 7, - .sg_tablesize = SG_ALL, - .cmd_per_lun = CMD_PER_LUN, - .use_clustering = DISABLE_CLUSTERING, + .bios_param = NCR5380_BIOSPARAM, + .can_queue = 16, + .this_id = 7, + .sg_tablesize = SG_ALL, + .cmd_per_lun = 2, + .use_clustering = DISABLE_CLUSTERING, + .cmd_size = NCR5380_CMD_SIZE, + .max_sectors = 128, }; -#include <linux/module.h> + #include "scsi_module.c" module_param(ncr_irq, int, 0); @@ -721,6 +792,7 @@ module_param(ncr_5380, int, 0); module_param(ncr_53c400, int, 0); module_param(ncr_53c400a, int, 0); module_param(dtc_3181e, int, 0); +module_param(hp_c2502, int, 0); MODULE_LICENSE("GPL"); #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE) diff --git a/drivers/scsi/g_NCR5380.h b/drivers/scsi/g_NCR5380.h index bea1a3b9b862..6f3d2ac4f185 100644 --- a/drivers/scsi/g_NCR5380.h +++ b/drivers/scsi/g_NCR5380.h @@ -14,81 +14,67 @@ #ifndef GENERIC_NCR5380_H #define GENERIC_NCR5380_H -#ifdef NCR53C400 +#ifdef CONFIG_SCSI_GENERIC_NCR53C400 #define BIOSPARAM #define NCR5380_BIOSPARAM generic_NCR5380_biosparam #else #define NCR5380_BIOSPARAM NULL #endif -#ifndef ASM - -#ifndef CMD_PER_LUN -#define CMD_PER_LUN 2 -#endif - -#ifndef CAN_QUEUE -#define CAN_QUEUE 16 -#endif - #define __STRVAL(x) #x #define STRVAL(x) __STRVAL(x) #ifndef SCSI_G_NCR5380_MEM +#define DRV_MODULE_NAME "g_NCR5380" -#define NCR5380_map_config port #define NCR5380_map_type int #define NCR5380_map_name port -#define NCR5380_instance_name io_port -#define NCR53C400_register_offset 0 -#define NCR53C400_address_adjust 8 -#ifdef NCR53C400 +#ifdef CONFIG_SCSI_GENERIC_NCR53C400 #define NCR5380_region_size 16 #else #define NCR5380_region_size 8 #endif -#define NCR5380_read(reg) (inb(NCR5380_map_name + (reg))) -#define NCR5380_write(reg, value) (outb((value), (NCR5380_map_name + (reg)))) +#define NCR5380_read(reg) \ + inb(instance->io_port + (reg)) +#define NCR5380_write(reg, value) \ + outb(value, instance->io_port + (reg)) #define NCR5380_implementation_fields \ - NCR5380_map_type NCR5380_map_name - -#define NCR5380_local_declare() \ - register NCR5380_implementation_fields - -#define NCR5380_setup(instance) \ - NCR5380_map_name = (NCR5380_map_type)((instance)->NCR5380_instance_name) + int c400_ctl_status; \ + int c400_blk_cnt; \ + int c400_host_buf; \ + int io_width; #else /* therefore SCSI_G_NCR5380_MEM */ +#define DRV_MODULE_NAME "g_NCR5380_mmio" -#define NCR5380_map_config memory #define NCR5380_map_type unsigned long #define NCR5380_map_name base -#define NCR5380_instance_name base -#define NCR53C400_register_offset 0x108 -#define NCR53C400_address_adjust 0 #define NCR53C400_mem_base 0x3880 #define NCR53C400_host_buffer 0x3900 #define NCR5380_region_size 0x3a00 -#define NCR5380_read(reg) readb(iomem + NCR53C400_mem_base + (reg)) -#define NCR5380_write(reg, value) writeb(value, iomem + NCR53C400_mem_base + (reg)) +#define NCR5380_read(reg) \ + readb(((struct NCR5380_hostdata *)shost_priv(instance))->iomem + \ + NCR53C400_mem_base + (reg)) +#define NCR5380_write(reg, value) \ + writeb(value, ((struct NCR5380_hostdata *)shost_priv(instance))->iomem + \ + NCR53C400_mem_base + (reg)) #define NCR5380_implementation_fields \ - NCR5380_map_type NCR5380_map_name; \ - void __iomem *iomem; - -#define NCR5380_local_declare() \ - register void __iomem *iomem - -#define NCR5380_setup(instance) \ - iomem = (((struct NCR5380_hostdata *)(instance)->hostdata)->iomem) + void __iomem *iomem; \ + int c400_ctl_status; \ + int c400_blk_cnt; \ + int c400_host_buf; #endif +#define NCR5380_dma_xfer_len(instance, cmd, phase) \ + generic_NCR5380_dma_xfer_len(cmd) + #define NCR5380_intr generic_NCR5380_intr #define NCR5380_queue_command generic_NCR5380_queue_command #define NCR5380_abort generic_NCR5380_abort @@ -102,7 +88,7 @@ #define BOARD_NCR53C400 1 #define BOARD_NCR53C400A 2 #define BOARD_DTC3181E 3 +#define BOARD_HP_C2502 4 -#endif /* ndef ASM */ #endif /* GENERIC_NCR5380_H */ diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c index d54381149c0d..057fdeb720ac 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c @@ -247,41 +247,36 @@ /* ITCT header */ /* qw0 */ #define ITCT_HDR_DEV_TYPE_OFF 0 -#define ITCT_HDR_DEV_TYPE_MSK (0x3 << ITCT_HDR_DEV_TYPE_OFF) +#define ITCT_HDR_DEV_TYPE_MSK (0x3ULL << ITCT_HDR_DEV_TYPE_OFF) #define ITCT_HDR_VALID_OFF 2 -#define ITCT_HDR_VALID_MSK (0x1 << ITCT_HDR_VALID_OFF) -#define ITCT_HDR_BREAK_REPLY_ENA_OFF 3 -#define ITCT_HDR_BREAK_REPLY_ENA_MSK (0x1 << ITCT_HDR_BREAK_REPLY_ENA_OFF) +#define ITCT_HDR_VALID_MSK (0x1ULL << ITCT_HDR_VALID_OFF) #define ITCT_HDR_AWT_CONTROL_OFF 4 -#define ITCT_HDR_AWT_CONTROL_MSK (0x1 << ITCT_HDR_AWT_CONTROL_OFF) +#define ITCT_HDR_AWT_CONTROL_MSK (0x1ULL << ITCT_HDR_AWT_CONTROL_OFF) #define ITCT_HDR_MAX_CONN_RATE_OFF 5 -#define ITCT_HDR_MAX_CONN_RATE_MSK (0xf << ITCT_HDR_MAX_CONN_RATE_OFF) +#define ITCT_HDR_MAX_CONN_RATE_MSK (0xfULL << ITCT_HDR_MAX_CONN_RATE_OFF) #define ITCT_HDR_VALID_LINK_NUM_OFF 9 -#define ITCT_HDR_VALID_LINK_NUM_MSK (0xf << ITCT_HDR_VALID_LINK_NUM_OFF) +#define ITCT_HDR_VALID_LINK_NUM_MSK (0xfULL << ITCT_HDR_VALID_LINK_NUM_OFF) #define ITCT_HDR_PORT_ID_OFF 13 -#define ITCT_HDR_PORT_ID_MSK (0x7 << ITCT_HDR_PORT_ID_OFF) +#define ITCT_HDR_PORT_ID_MSK (0x7ULL << ITCT_HDR_PORT_ID_OFF) #define ITCT_HDR_SMP_TIMEOUT_OFF 16 -#define ITCT_HDR_SMP_TIMEOUT_MSK (0xffff << ITCT_HDR_SMP_TIMEOUT_OFF) -#define ITCT_HDR_MAX_BURST_BYTES_OFF 16 -#define ITCT_HDR_MAX_BURST_BYTES_MSK (0xffffffff << \ - ITCT_MAX_BURST_BYTES_OFF) +#define ITCT_HDR_SMP_TIMEOUT_MSK (0xffffULL << ITCT_HDR_SMP_TIMEOUT_OFF) /* qw1 */ #define ITCT_HDR_MAX_SAS_ADDR_OFF 0 #define ITCT_HDR_MAX_SAS_ADDR_MSK (0xffffffffffffffff << \ ITCT_HDR_MAX_SAS_ADDR_OFF) /* qw2 */ #define ITCT_HDR_IT_NEXUS_LOSS_TL_OFF 0 -#define ITCT_HDR_IT_NEXUS_LOSS_TL_MSK (0xffff << \ +#define ITCT_HDR_IT_NEXUS_LOSS_TL_MSK (0xffffULL << \ ITCT_HDR_IT_NEXUS_LOSS_TL_OFF) #define ITCT_HDR_BUS_INACTIVE_TL_OFF 16 -#define ITCT_HDR_BUS_INACTIVE_TL_MSK (0xffff << \ +#define ITCT_HDR_BUS_INACTIVE_TL_MSK (0xffffULL << \ ITCT_HDR_BUS_INACTIVE_TL_OFF) #define ITCT_HDR_MAX_CONN_TL_OFF 32 -#define ITCT_HDR_MAX_CONN_TL_MSK (0xffff << \ +#define ITCT_HDR_MAX_CONN_TL_MSK (0xffffULL << \ ITCT_HDR_MAX_CONN_TL_OFF) #define ITCT_HDR_REJ_OPEN_TL_OFF 48 -#define ITCT_HDR_REJ_OPEN_TL_MSK (0xffff << \ - ITCT_REJ_OPEN_TL_OFF) +#define ITCT_HDR_REJ_OPEN_TL_MSK (0xffffULL << \ + ITCT_HDR_REJ_OPEN_TL_OFF) /* Err record header */ #define ERR_HDR_DMA_TX_ERR_TYPE_OFF 0 @@ -533,10 +528,10 @@ static void setup_itct_v1_hw(struct hisi_hba *hisi_hba, itct->sas_addr = __swab64(itct->sas_addr); /* qw2 */ - itct->qw2 = cpu_to_le64((500 < ITCT_HDR_IT_NEXUS_LOSS_TL_OFF) | - (0xff00 < ITCT_HDR_BUS_INACTIVE_TL_OFF) | - (0xff00 < ITCT_HDR_MAX_CONN_TL_OFF) | - (0xff00 < ITCT_HDR_REJ_OPEN_TL_OFF)); + itct->qw2 = cpu_to_le64((500ULL << ITCT_HDR_IT_NEXUS_LOSS_TL_OFF) | + (0xff00ULL << ITCT_HDR_BUS_INACTIVE_TL_OFF) | + (0xff00ULL << ITCT_HDR_MAX_CONN_TL_OFF) | + (0xff00ULL << ITCT_HDR_REJ_OPEN_TL_OFF)); } static void free_device_v1_hw(struct hisi_hba *hisi_hba, @@ -544,7 +539,8 @@ static void free_device_v1_hw(struct hisi_hba *hisi_hba, { u64 dev_id = sas_dev->device_id; struct hisi_sas_itct *itct = &hisi_hba->itct[dev_id]; - u32 qw0, reg_val = hisi_sas_read32(hisi_hba, CFG_AGING_TIME); + u64 qw0; + u32 reg_val = hisi_sas_read32(hisi_hba, CFG_AGING_TIME); reg_val |= CFG_AGING_TIME_ITCT_REL_MSK; hisi_sas_write32(hisi_hba, CFG_AGING_TIME, reg_val); diff --git a/drivers/scsi/imm.c b/drivers/scsi/imm.c index 4e1a632ccf16..f8b88fa78e62 100644 --- a/drivers/scsi/imm.c +++ b/drivers/scsi/imm.c @@ -43,6 +43,7 @@ typedef struct { unsigned dp:1; /* Data phase present */ unsigned rd:1; /* Read data in data phase */ unsigned wanted:1; /* Parport sharing busy flag */ + unsigned int dev_no; /* Device number */ wait_queue_head_t *waiting; struct Scsi_Host *host; struct list_head list; @@ -1120,15 +1121,40 @@ static struct scsi_host_template imm_template = { static LIST_HEAD(imm_hosts); +/* + * Finds the first available device number that can be alloted to the + * new imm device and returns the address of the previous node so that + * we can add to the tail and have a list in the ascending order. + */ + +static inline imm_struct *find_parent(void) +{ + imm_struct *dev, *par = NULL; + unsigned int cnt = 0; + + if (list_empty(&imm_hosts)) + return NULL; + + list_for_each_entry(dev, &imm_hosts, list) { + if (dev->dev_no != cnt) + return par; + cnt++; + par = dev; + } + + return par; +} + static int __imm_attach(struct parport *pb) { struct Scsi_Host *host; - imm_struct *dev; + imm_struct *dev, *temp; DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waiting); DEFINE_WAIT(wait); int ports; int modes, ppb; int err = -ENOMEM; + struct pardev_cb imm_cb; init_waitqueue_head(&waiting); @@ -1141,9 +1167,15 @@ static int __imm_attach(struct parport *pb) dev->mode = IMM_AUTODETECT; INIT_LIST_HEAD(&dev->list); - dev->dev = parport_register_device(pb, "imm", NULL, imm_wakeup, - NULL, 0, dev); + temp = find_parent(); + if (temp) + dev->dev_no = temp->dev_no + 1; + + memset(&imm_cb, 0, sizeof(imm_cb)); + imm_cb.private = dev; + imm_cb.wakeup = imm_wakeup; + dev->dev = parport_register_dev_model(pb, "imm", &imm_cb, dev->dev_no); if (!dev->dev) goto out; @@ -1207,7 +1239,10 @@ static int __imm_attach(struct parport *pb) host->unique_id = pb->number; *(imm_struct **)&host->hostdata = dev; dev->host = host; - list_add_tail(&dev->list, &imm_hosts); + if (!temp) + list_add_tail(&dev->list, &imm_hosts); + else + list_add_tail(&dev->list, &temp->list); err = scsi_add_host(host, NULL); if (err) goto out2; @@ -1245,9 +1280,10 @@ static void imm_detach(struct parport *pb) } static struct parport_driver imm_driver = { - .name = "imm", - .attach = imm_attach, - .detach = imm_detach, + .name = "imm", + .match_port = imm_attach, + .detach = imm_detach, + .devmodel = true, }; static int __init imm_driver_init(void) diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 536cd5a80422..1c3759bab80b 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -4003,13 +4003,12 @@ static ssize_t ipr_store_update_fw(struct device *dev, struct ipr_sglist *sglist; char fname[100]; char *src; - int len, result, dnld_size; + int result, dnld_size; if (!capable(CAP_SYS_ADMIN)) return -EACCES; - len = snprintf(fname, 99, "%s", buf); - fname[len-1] = '\0'; + snprintf(fname, sizeof(fname), "%s", buf); if (request_firmware(&fw_entry, fname, &ioa_cfg->pdev->dev)) { dev_err(&ioa_cfg->pdev->dev, "Firmware file %s not found\n", fname); diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c index d64a769b8155..bb2381314a2b 100644 --- a/drivers/scsi/mac_scsi.c +++ b/drivers/scsi/mac_scsi.c @@ -12,7 +12,6 @@ */ #include <linux/types.h> -#include <linux/delay.h> #include <linux/module.h> #include <linux/ioport.h> #include <linux/init.h> @@ -32,14 +31,13 @@ #define PSEUDO_DMA #define NCR5380_implementation_fields unsigned char *pdma_base -#define NCR5380_local_declare() struct Scsi_Host *_instance -#define NCR5380_setup(instance) _instance = instance -#define NCR5380_read(reg) macscsi_read(_instance, reg) -#define NCR5380_write(reg, value) macscsi_write(_instance, reg, value) +#define NCR5380_read(reg) macscsi_read(instance, reg) +#define NCR5380_write(reg, value) macscsi_write(instance, reg, value) #define NCR5380_pread macscsi_pread #define NCR5380_pwrite macscsi_pwrite +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) #define NCR5380_intr macscsi_intr #define NCR5380_queue_command macscsi_queue_command @@ -51,8 +49,6 @@ #include "NCR5380.h" -#define RESET_BOOT - static int setup_can_queue = -1; module_param(setup_can_queue, int, 0); static int setup_cmd_per_lun = -1; @@ -65,17 +61,8 @@ static int setup_use_tagged_queuing = -1; module_param(setup_use_tagged_queuing, int, 0); static int setup_hostid = -1; module_param(setup_hostid, int, 0); - -/* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms, - * we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more - * need ten times the standard value... */ -#define TOSHIBA_DELAY - -#ifdef TOSHIBA_DELAY -#define AFTER_RESET_DELAY (5*HZ/2) -#else -#define AFTER_RESET_DELAY (HZ/2) -#endif +static int setup_toshiba_delay = -1; +module_param(setup_toshiba_delay, int, 0); /* * NCR 5380 register access functions @@ -94,12 +81,12 @@ static inline void macscsi_write(struct Scsi_Host *instance, int reg, int value) #ifndef MODULE static int __init mac_scsi_setup(char *str) { - int ints[7]; + int ints[8]; (void)get_options(str, ARRAY_SIZE(ints), ints); - if (ints[0] < 1 || ints[0] > 6) { - pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>]]]]]\n"); + if (ints[0] < 1) { + pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n"); return 0; } if (ints[0] >= 1) @@ -114,50 +101,14 @@ static int __init mac_scsi_setup(char *str) setup_use_tagged_queuing = ints[5]; if (ints[0] >= 6) setup_use_pdma = ints[6]; + if (ints[0] >= 7) + setup_toshiba_delay = ints[7]; return 1; } __setup("mac5380=", mac_scsi_setup); #endif /* !MODULE */ -#ifdef RESET_BOOT -/* - * Our 'bus reset on boot' function - */ - -static void mac_scsi_reset_boot(struct Scsi_Host *instance) -{ - unsigned long end; - - NCR5380_local_declare(); - NCR5380_setup(instance); - - /* - * Do a SCSI reset to clean up the bus during initialization. No messing - * with the queues, interrupts, or locks necessary here. - */ - - printk(KERN_INFO "Macintosh SCSI: resetting the SCSI bus..." ); - - /* get in phase */ - NCR5380_write( TARGET_COMMAND_REG, - PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) )); - - /* assert RST */ - NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST ); - /* The min. reset hold time is 25us, so 40us should be enough */ - udelay( 50 ); - /* reset RST and interrupt */ - NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE ); - NCR5380_read( RESET_PARITY_INTERRUPT_REG ); - - for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); ) - barrier(); - - printk(KERN_INFO " done\n" ); -} -#endif - #ifdef PSEUDO_DMA /* Pseudo-DMA: (Ove Edlund) @@ -235,9 +186,6 @@ static int macscsi_pread(struct Scsi_Host *instance, unsigned char *d; unsigned char *s; - NCR5380_local_declare(); - NCR5380_setup(instance); - s = hostdata->pdma_base + (INPUT_DATA_REG << 4); d = dst; @@ -329,9 +277,6 @@ static int macscsi_pwrite(struct Scsi_Host *instance, unsigned char *s; unsigned char *d; - NCR5380_local_declare(); - NCR5380_setup(instance); - s = src; d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4); @@ -364,20 +309,22 @@ static int macscsi_pwrite(struct Scsi_Host *instance, #define PFX DRV_MODULE_NAME ": " static struct scsi_host_template mac_scsi_template = { - .module = THIS_MODULE, - .proc_name = DRV_MODULE_NAME, - .show_info = macscsi_show_info, - .write_info = macscsi_write_info, - .name = "Macintosh NCR5380 SCSI", - .info = macscsi_info, - .queuecommand = macscsi_queue_command, - .eh_abort_handler = macscsi_abort, - .eh_bus_reset_handler = macscsi_bus_reset, - .can_queue = 16, - .this_id = 7, - .sg_tablesize = SG_ALL, - .cmd_per_lun = 2, - .use_clustering = DISABLE_CLUSTERING + .module = THIS_MODULE, + .proc_name = DRV_MODULE_NAME, + .show_info = macscsi_show_info, + .write_info = macscsi_write_info, + .name = "Macintosh NCR5380 SCSI", + .info = macscsi_info, + .queuecommand = macscsi_queue_command, + .eh_abort_handler = macscsi_abort, + .eh_bus_reset_handler = macscsi_bus_reset, + .can_queue = 16, + .this_id = 7, + .sg_tablesize = SG_ALL, + .cmd_per_lun = 2, + .use_clustering = DISABLE_CLUSTERING, + .cmd_size = NCR5380_CMD_SIZE, + .max_sectors = 128, }; static int __init mac_scsi_probe(struct platform_device *pdev) @@ -432,15 +379,14 @@ static int __init mac_scsi_probe(struct platform_device *pdev) } else host_flags |= FLAG_NO_PSEUDO_DMA; -#ifdef RESET_BOOT - mac_scsi_reset_boot(instance); -#endif - #ifdef SUPPORT_TAGS host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0; #endif + host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0; - NCR5380_init(instance, host_flags); + error = NCR5380_init(instance, host_flags); + if (error) + goto fail_init; if (instance->irq != NO_IRQ) { error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED, @@ -449,6 +395,8 @@ static int __init mac_scsi_probe(struct platform_device *pdev) goto fail_irq; } + NCR5380_maybe_reset_bus(instance); + error = scsi_add_host(instance, NULL); if (error) goto fail_host; @@ -463,6 +411,7 @@ fail_host: free_irq(instance->irq, instance); fail_irq: NCR5380_exit(instance); +fail_init: scsi_host_put(instance); return error; } diff --git a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c index a70692779a16..4cf9ed96414f 100644 --- a/drivers/scsi/megaraid/megaraid_mm.c +++ b/drivers/scsi/megaraid/megaraid_mm.c @@ -179,8 +179,12 @@ mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) /* * The following call will block till a kioc is available + * or return NULL if the list head is empty for the pointer + * of type mraid_mmapt passed to mraid_mm_alloc_kioc */ kioc = mraid_mm_alloc_kioc(adp); + if (!kioc) + return -ENXIO; /* * User sent the old mimd_t ioctl packet. Convert it to uioc_t. diff --git a/drivers/scsi/pas16.c b/drivers/scsi/pas16.c index e81eadd08afc..512037e27783 100644 --- a/drivers/scsi/pas16.c +++ b/drivers/scsi/pas16.c @@ -1,6 +1,4 @@ #define PSEUDO_DMA -#define UNSAFE /* Not unsafe for PAS16 -- use it */ -#define PDEBUG 0 /* * This driver adapted from Drew Eckhardt's Trantor T128 driver @@ -71,14 +69,10 @@ #include <linux/module.h> -#include <linux/signal.h> -#include <linux/proc_fs.h> #include <asm/io.h> #include <asm/dma.h> #include <linux/blkdev.h> -#include <linux/delay.h> #include <linux/interrupt.h> -#include <linux/stat.h> #include <linux/init.h> #include <scsi/scsi_host.h> @@ -87,8 +81,8 @@ #include "NCR5380.h" -static unsigned short pas16_addr = 0; -static int pas16_irq = 0; +static unsigned short pas16_addr; +static int pas16_irq; static const int scsi_irq_translate[] = @@ -146,22 +140,6 @@ static const unsigned short pas16_offset[ 8 ] = * START_DMA_INITIATOR_RECEIVE_REG wo */ }; -/*----------------------------------------------------------------*/ -/* the following will set the monitor border color (useful to find - where something crashed or gets stuck at */ -/* 1 = blue - 2 = green - 3 = cyan - 4 = red - 5 = magenta - 6 = yellow - 7 = white -*/ -#if 1 -#define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);} -#else -#define rtrc(i) {} -#endif /* @@ -205,7 +183,7 @@ static void __init outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */ outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */ - NCR5380_read( RESET_PARITY_INTERRUPT_REG ); + inb(io_port + pas16_offset[RESET_PARITY_INTERRUPT_REG]); /* Set the SCSI interrupt pointer without mucking up the sound * interrupt pointer in the same byte. @@ -280,13 +258,13 @@ static int __init * put in an additional test to try to weed them out. */ - outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */ - NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */ - if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */ - return 0; /* and try to read */ - NCR5380_write( MODE_REG, 0x00 ); /* it back. */ - if( NCR5380_read( MODE_REG ) != 0x00 ) - return 0; + outb(0x01, io_port + WAIT_STATE); /* 1 Wait state */ + outb(0x20, io_port + pas16_offset[MODE_REG]); /* Is it really SCSI? */ + if (inb(io_port + pas16_offset[MODE_REG]) != 0x20) /* Write to a reg. */ + return 0; /* and try to read */ + outb(0x00, io_port + pas16_offset[MODE_REG]); /* it back. */ + if (inb(io_port + pas16_offset[MODE_REG]) != 0x00) + return 0; return 1; } @@ -305,7 +283,7 @@ static int __init static int __init pas16_setup(char *str) { - static int commandline_current = 0; + static int commandline_current; int i; int ints[10]; @@ -344,8 +322,8 @@ __setup("pas16=", pas16_setup); static int __init pas16_detect(struct scsi_host_template *tpnt) { - static int current_override = 0; - static unsigned short current_base = 0; + static int current_override; + static unsigned short current_base; struct Scsi_Host *instance; unsigned short io_port; int count; @@ -377,34 +355,32 @@ static int __init pas16_detect(struct scsi_host_template *tpnt) } else for (; !io_port && (current_base < NO_BASES); ++current_base) { -#if (PDEBUG & PDEBUG_INIT) - printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port); -#endif + dprintk(NDEBUG_INIT, "pas16: probing io_port 0x%04x\n", + (unsigned int)bases[current_base].io_port); if ( !bases[current_base].noauto && pas16_hw_detect( current_base ) ){ io_port = bases[current_base].io_port; init_board( io_port, default_irqs[ current_base ], 0 ); -#if (PDEBUG & PDEBUG_INIT) - printk("scsi-pas16 : detected board.\n"); -#endif + dprintk(NDEBUG_INIT, "pas16: detected board\n"); } } - -#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT) - printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port); -#endif + dprintk(NDEBUG_INIT, "pas16: io_port = 0x%04x\n", + (unsigned int)io_port); if (!io_port) break; instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); if(instance == NULL) - break; + goto out; instance->io_port = io_port; - NCR5380_init(instance, 0); + if (NCR5380_init(instance, 0)) + goto out_unregister; + + NCR5380_maybe_reset_bus(instance); if (overrides[current_override].irq != IRQ_AUTO) instance->irq = overrides[current_override].irq; @@ -431,14 +407,18 @@ static int __init pas16_detect(struct scsi_host_template *tpnt) outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 ); } -#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT) - printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); -#endif + dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n", + instance->host_no, instance->irq); ++current_override; ++count; } return count; + +out_unregister: + scsi_unregister(instance); +out: + return count; } /* @@ -561,29 +541,29 @@ static int pas16_release(struct Scsi_Host *shost) if (shost->irq != NO_IRQ) free_irq(shost->irq, shost); NCR5380_exit(shost); - if (shost->io_port && shost->n_io_port) - release_region(shost->io_port, shost->n_io_port); scsi_unregister(shost); return 0; } static struct scsi_host_template driver_template = { - .name = "Pro Audio Spectrum-16 SCSI", - .detect = pas16_detect, - .release = pas16_release, - .proc_name = "pas16", - .show_info = pas16_show_info, - .write_info = pas16_write_info, - .info = pas16_info, - .queuecommand = pas16_queue_command, - .eh_abort_handler = pas16_abort, - .eh_bus_reset_handler = pas16_bus_reset, - .bios_param = pas16_biosparam, - .can_queue = CAN_QUEUE, - .this_id = 7, - .sg_tablesize = SG_ALL, - .cmd_per_lun = CMD_PER_LUN, - .use_clustering = DISABLE_CLUSTERING, + .name = "Pro Audio Spectrum-16 SCSI", + .detect = pas16_detect, + .release = pas16_release, + .proc_name = "pas16", + .show_info = pas16_show_info, + .write_info = pas16_write_info, + .info = pas16_info, + .queuecommand = pas16_queue_command, + .eh_abort_handler = pas16_abort, + .eh_bus_reset_handler = pas16_bus_reset, + .bios_param = pas16_biosparam, + .can_queue = 32, + .this_id = 7, + .sg_tablesize = SG_ALL, + .cmd_per_lun = 2, + .use_clustering = DISABLE_CLUSTERING, + .cmd_size = NCR5380_CMD_SIZE, + .max_sectors = 128, }; #include "scsi_module.c" diff --git a/drivers/scsi/pas16.h b/drivers/scsi/pas16.h index c6109c80050b..d37527717225 100644 --- a/drivers/scsi/pas16.h +++ b/drivers/scsi/pas16.h @@ -24,9 +24,6 @@ #ifndef PAS16_H #define PAS16_H -#define PDEBUG_INIT 0x1 -#define PDEBUG_TRANSFER 0x2 - #define PAS16_DEFAULT_BASE_1 0x388 #define PAS16_DEFAULT_BASE_2 0x384 #define PAS16_DEFAULT_BASE_3 0x38c @@ -98,46 +95,16 @@ #define OPERATION_MODE_1 0xec03 #define IO_CONFIG_3 0xf002 +#define NCR5380_implementation_fields /* none */ -#ifndef ASM - -#ifndef CMD_PER_LUN -#define CMD_PER_LUN 2 -#endif - -#ifndef CAN_QUEUE -#define CAN_QUEUE 32 -#endif - -#define NCR5380_implementation_fields \ - volatile unsigned short io_port - -#define NCR5380_local_declare() \ - volatile unsigned short io_port +#define PAS16_io_port(reg) (instance->io_port + pas16_offset[(reg)]) -#define NCR5380_setup(instance) \ - io_port = (instance)->io_port - -#define PAS16_io_port(reg) ( io_port + pas16_offset[(reg)] ) - -#if !(PDEBUG & PDEBUG_TRANSFER) #define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) ) #define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) ) -#else -#define NCR5380_read(reg) \ - (((unsigned char) printk("scsi%d : read register %d at io_port %04x\n"\ - , instance->hostno, (reg), PAS16_io_port(reg))), inb( PAS16_io_port(reg)) ) - -#define NCR5380_write(reg, value) \ - (printk("scsi%d : write %02x to register %d at io_port %04x\n", \ - instance->hostno, (value), (reg), PAS16_io_port(reg)), \ - outb( (value),PAS16_io_port(reg) ) ) - -#endif +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) #define NCR5380_intr pas16_intr -#define do_NCR5380_intr do_pas16_intr #define NCR5380_queue_command pas16_queue_command #define NCR5380_abort pas16_abort #define NCR5380_bus_reset pas16_bus_reset @@ -150,5 +117,4 @@ #define PAS16_IRQS 0xd4a8 -#endif /* ndef ASM */ #endif /* PAS16_H */ diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c index 2c1160c7ec92..47b9d13f97b8 100644 --- a/drivers/scsi/scsi_devinfo.c +++ b/drivers/scsi/scsi_devinfo.c @@ -227,6 +227,7 @@ static struct { {"Promise", "VTrak E610f", NULL, BLIST_SPARSELUN | BLIST_NO_RSOC}, {"Promise", "", NULL, BLIST_SPARSELUN}, {"QNAP", "iSCSI Storage", NULL, BLIST_MAX_1024}, + {"SYNOLOGY", "iSCSI Storage", NULL, BLIST_MAX_1024}, {"QUANTUM", "XP34301", "1071", BLIST_NOTQ}, {"REGAL", "CDC-4X", NULL, BLIST_MAX5LUN | BLIST_SINGLELUN}, {"SanDisk", "ImageMate CF-SD1", NULL, BLIST_FORCELUN}, diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 41c115c230d9..55627d097873 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -390,7 +390,7 @@ module_param(storvsc_ringbuffer_size, int, S_IRUGO); MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)"); module_param(storvsc_vcpus_per_sub_channel, int, S_IRUGO); -MODULE_PARM_DESC(vcpus_per_sub_channel, "Ratio of VCPUs to subchannels"); +MODULE_PARM_DESC(storvsc_vcpus_per_sub_channel, "Ratio of VCPUs to subchannels"); /* * Timeout in seconds for all devices managed by this driver. */ diff --git a/drivers/scsi/sun3_scsi.c b/drivers/scsi/sun3_scsi.c index 22a42836d193..b9de487bbd31 100644 --- a/drivers/scsi/sun3_scsi.c +++ b/drivers/scsi/sun3_scsi.c @@ -53,13 +53,12 @@ #define NCR5380_queue_command sun3scsi_queue_command #define NCR5380_bus_reset sun3scsi_bus_reset #define NCR5380_abort sun3scsi_abort -#define NCR5380_show_info sun3scsi_show_info #define NCR5380_info sun3scsi_info #define NCR5380_dma_read_setup(instance, data, count) \ - sun3scsi_dma_setup(data, count, 0) + sun3scsi_dma_setup(instance, data, count, 0) #define NCR5380_dma_write_setup(instance, data, count) \ - sun3scsi_dma_setup(data, count, 1) + sun3scsi_dma_setup(instance, data, count, 1) #define NCR5380_dma_residual(instance) \ sun3scsi_dma_residual(instance) #define NCR5380_dma_xfer_len(instance, cmd, phase) \ @@ -86,10 +85,6 @@ module_param(setup_use_tagged_queuing, int, 0); static int setup_hostid = -1; module_param(setup_hostid, int, 0); -/* #define RESET_BOOT */ - -#define AFTER_RESET_DELAY (HZ/2) - /* ms to wait after hitting dma regs */ #define SUN3_DMA_DELAY 10 @@ -100,11 +95,10 @@ static struct scsi_cmnd *sun3_dma_setup_done; static unsigned char *sun3_scsi_regp; static volatile struct sun3_dma_regs *dregs; static struct sun3_udc_regs *udc_regs; -static unsigned char *sun3_dma_orig_addr = NULL; -static unsigned long sun3_dma_orig_count = 0; -static int sun3_dma_active = 0; -static unsigned long last_residual = 0; -static struct Scsi_Host *default_instance; +static unsigned char *sun3_dma_orig_addr; +static unsigned long sun3_dma_orig_count; +static int sun3_dma_active; +static unsigned long last_residual; /* * NCR 5380 register access functions @@ -144,50 +138,12 @@ static inline void sun3_udc_write(unsigned short val, unsigned char reg) } #endif -#ifdef RESET_BOOT -static void sun3_scsi_reset_boot(struct Scsi_Host *instance) -{ - unsigned long end; - - /* - * Do a SCSI reset to clean up the bus during initialization. No - * messing with the queues, interrupts, or locks necessary here. - */ - - printk( "Sun3 SCSI: resetting the SCSI bus..." ); - - /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */ -// sun3_disable_irq( IRQ_SUN3_SCSI ); - - /* get in phase */ - NCR5380_write( TARGET_COMMAND_REG, - PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) )); - - /* assert RST */ - NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST ); - - /* The min. reset hold time is 25us, so 40us should be enough */ - udelay( 50 ); - - /* reset RST and interrupt */ - NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE ); - NCR5380_read( RESET_PARITY_INTERRUPT_REG ); - - for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); ) - barrier(); - - /* switch on SCSI IRQ again */ -// sun3_enable_irq( IRQ_SUN3_SCSI ); - - printk( " done\n" ); -} -#endif - // safe bits for the CSR #define CSR_GOOD 0x060f -static irqreturn_t scsi_sun3_intr(int irq, void *dummy) +static irqreturn_t scsi_sun3_intr(int irq, void *dev) { + struct Scsi_Host *instance = dev; unsigned short csr = dregs->csr; int handled = 0; @@ -196,46 +152,24 @@ static irqreturn_t scsi_sun3_intr(int irq, void *dummy) #endif if(csr & ~CSR_GOOD) { - if(csr & CSR_DMA_BUSERR) { - printk("scsi%d: bus error in dma\n", default_instance->host_no); - } - - if(csr & CSR_DMA_CONFLICT) { - printk("scsi%d: dma conflict\n", default_instance->host_no); - } + if (csr & CSR_DMA_BUSERR) + shost_printk(KERN_ERR, instance, "bus error in DMA\n"); + if (csr & CSR_DMA_CONFLICT) + shost_printk(KERN_ERR, instance, "DMA conflict\n"); handled = 1; } if(csr & (CSR_SDB_INT | CSR_DMA_INT)) { - NCR5380_intr(irq, dummy); + NCR5380_intr(irq, dev); handled = 1; } return IRQ_RETVAL(handled); } -/* - * Debug stuff - to be called on NMI, or sysrq key. Use at your own risk; - * reentering NCR5380_print_status seems to have ugly side effects - */ - -/* this doesn't seem to get used at all -- sam */ -#if 0 -void sun3_sun3_debug (void) -{ - unsigned long flags; - - if (default_instance) { - local_irq_save(flags); - NCR5380_print_status(default_instance); - local_irq_restore(flags); - } -} -#endif - - /* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */ -static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag) +static unsigned long sun3scsi_dma_setup(struct Scsi_Host *instance, + void *data, unsigned long count, int write_flag) { void *addr; @@ -287,10 +221,9 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri dregs->csr |= CSR_FIFO; if(dregs->fifo_count != count) { - printk("scsi%d: fifo_mismatch %04x not %04x\n", - default_instance->host_no, dregs->fifo_count, - (unsigned int) count); - NCR5380_dprint(NDEBUG_DMA, default_instance); + shost_printk(KERN_ERR, instance, "FIFO mismatch %04x not %04x\n", + dregs->fifo_count, (unsigned int) count); + NCR5380_dprint(NDEBUG_DMA, instance); } /* setup udc */ @@ -325,21 +258,6 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri } -#ifndef SUN3_SCSI_VME -static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance) -{ - unsigned short resid; - - dregs->udc_addr = 0x32; - udelay(SUN3_DMA_DELAY); - resid = dregs->udc_data; - udelay(SUN3_DMA_DELAY); - resid *= 2; - - return (unsigned long) resid; -} -#endif - static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance) { return last_residual; @@ -437,7 +355,10 @@ static int sun3scsi_dma_finish(int write_flag) } } - count = sun3scsi_dma_count(default_instance); + dregs->udc_addr = 0x32; + udelay(SUN3_DMA_DELAY); + count = 2 * dregs->udc_data; + udelay(SUN3_DMA_DELAY); fifo = dregs->fifo_count; last_residual = fifo; @@ -502,17 +423,17 @@ static int sun3scsi_dma_finish(int write_flag) static struct scsi_host_template sun3_scsi_template = { .module = THIS_MODULE, .proc_name = DRV_MODULE_NAME, - .show_info = sun3scsi_show_info, .name = SUN3_SCSI_NAME, .info = sun3scsi_info, .queuecommand = sun3scsi_queue_command, - .eh_abort_handler = sun3scsi_abort, - .eh_bus_reset_handler = sun3scsi_bus_reset, + .eh_abort_handler = sun3scsi_abort, + .eh_bus_reset_handler = sun3scsi_bus_reset, .can_queue = 16, .this_id = 7, .sg_tablesize = SG_NONE, .cmd_per_lun = 2, - .use_clustering = DISABLE_CLUSTERING + .use_clustering = DISABLE_CLUSTERING, + .cmd_size = NCR5380_CMD_SIZE, }; static int __init sun3_scsi_probe(struct platform_device *pdev) @@ -591,7 +512,6 @@ static int __init sun3_scsi_probe(struct platform_device *pdev) error = -ENOMEM; goto fail_alloc; } - default_instance = instance; instance->io_port = (unsigned long)ioaddr; instance->irq = irq->start; @@ -600,7 +520,9 @@ static int __init sun3_scsi_probe(struct platform_device *pdev) host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0; #endif - NCR5380_init(instance, host_flags); + error = NCR5380_init(instance, host_flags); + if (error) + goto fail_init; error = request_irq(instance->irq, scsi_sun3_intr, 0, "NCR5380", instance); @@ -631,9 +553,7 @@ static int __init sun3_scsi_probe(struct platform_device *pdev) dregs->ivect = VME_DATA24 | (instance->irq & 0xff); #endif -#ifdef RESET_BOOT - sun3_scsi_reset_boot(instance); -#endif + NCR5380_maybe_reset_bus(instance); error = scsi_add_host(instance, NULL); if (error) @@ -649,6 +569,7 @@ fail_host: free_irq(instance->irq, instance); fail_irq: NCR5380_exit(instance); +fail_init: scsi_host_put(instance); fail_alloc: if (udc_regs) diff --git a/drivers/scsi/t128.c b/drivers/scsi/t128.c index 87828acbf7c6..4615fda60dbd 100644 --- a/drivers/scsi/t128.c +++ b/drivers/scsi/t128.c @@ -68,14 +68,11 @@ * 15 9-11 */ -#include <linux/signal.h> #include <linux/io.h> #include <linux/blkdev.h> #include <linux/interrupt.h> -#include <linux/stat.h> #include <linux/init.h> #include <linux/module.h> -#include <linux/delay.h> #include <scsi/scsi_host.h> #include "t128.h" @@ -126,7 +123,7 @@ static struct signature { static int __init t128_setup(char *str) { - static int commandline_current = 0; + static int commandline_current; int i; int ints[10]; @@ -165,7 +162,7 @@ __setup("t128=", t128_setup); static int __init t128_detect(struct scsi_host_template *tpnt) { - static int current_override = 0, current_base = 0; + static int current_override, current_base; struct Scsi_Host *instance; unsigned long base; void __iomem *p; @@ -182,9 +179,8 @@ static int __init t128_detect(struct scsi_host_template *tpnt) base = 0; } else for (; !base && (current_base < NO_BASES); ++current_base) { -#if (TDEBUG & TDEBUG_INIT) - printk("scsi-t128 : probing address %08x\n", bases[current_base].address); -#endif + dprintk(NDEBUG_INIT, "t128: probing address 0x%08x\n", + bases[current_base].address); if (bases[current_base].noauto) continue; p = ioremap(bases[current_base].address, 0x2000); @@ -195,17 +191,13 @@ static int __init t128_detect(struct scsi_host_template *tpnt) signatures[sig].string, strlen(signatures[sig].string))) { base = bases[current_base].address; -#if (TDEBUG & TDEBUG_INIT) - printk("scsi-t128 : detected board.\n"); -#endif + dprintk(NDEBUG_INIT, "t128: detected board\n"); goto found; } iounmap(p); } -#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) - printk("scsi-t128 : base = %08x\n", (unsigned int) base); -#endif + dprintk(NDEBUG_INIT, "t128: base = 0x%08x\n", (unsigned int)base); if (!base) break; @@ -213,12 +205,15 @@ static int __init t128_detect(struct scsi_host_template *tpnt) found: instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); if(instance == NULL) - break; - + goto out_unmap; + instance->base = base; ((struct NCR5380_hostdata *)instance->hostdata)->base = p; - NCR5380_init(instance, 0); + if (NCR5380_init(instance, 0)) + goto out_unregister; + + NCR5380_maybe_reset_bus(instance); if (overrides[current_override].irq != IRQ_AUTO) instance->irq = overrides[current_override].irq; @@ -242,27 +237,30 @@ found: printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); } -#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) - printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); -#endif + dprintk(NDEBUG_INIT, "scsi%d: irq = %d\n", + instance->host_no, instance->irq); ++current_override; ++count; } return count; + +out_unregister: + scsi_unregister(instance); +out_unmap: + iounmap(p); + return count; } static int t128_release(struct Scsi_Host *shost) { - NCR5380_local_declare(); - NCR5380_setup(shost); + struct NCR5380_hostdata *hostdata = shost_priv(shost); + if (shost->irq != NO_IRQ) free_irq(shost->irq, shost); NCR5380_exit(shost); - if (shost->io_port && shost->n_io_port) - release_region(shost->io_port, shost->n_io_port); scsi_unregister(shost); - iounmap(base); + iounmap(hostdata->base); return 0; } @@ -308,14 +306,14 @@ static int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev, * timeout. */ -static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst, - int len) { - NCR5380_local_declare(); - void __iomem *reg; +static inline int +NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + void __iomem *reg, *base = hostdata->base; unsigned char *d = dst; register int i = len; - NCR5380_setup(instance); reg = base + T_DATA_REG_OFFSET; #if 0 @@ -354,14 +352,14 @@ static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst, * timeout. */ -static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src, - int len) { - NCR5380_local_declare(); - void __iomem *reg; +static inline int +NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len) +{ + struct NCR5380_hostdata *hostdata = shost_priv(instance); + void __iomem *reg, *base = hostdata->base; unsigned char *s = src; register int i = len; - NCR5380_setup(instance); reg = base + T_DATA_REG_OFFSET; #if 0 @@ -392,21 +390,23 @@ MODULE_LICENSE("GPL"); #include "NCR5380.c" static struct scsi_host_template driver_template = { - .name = "Trantor T128/T128F/T228", - .detect = t128_detect, - .release = t128_release, - .proc_name = "t128", - .show_info = t128_show_info, - .write_info = t128_write_info, - .info = t128_info, - .queuecommand = t128_queue_command, - .eh_abort_handler = t128_abort, - .eh_bus_reset_handler = t128_bus_reset, - .bios_param = t128_biosparam, - .can_queue = CAN_QUEUE, - .this_id = 7, - .sg_tablesize = SG_ALL, - .cmd_per_lun = CMD_PER_LUN, - .use_clustering = DISABLE_CLUSTERING, + .name = "Trantor T128/T128F/T228", + .detect = t128_detect, + .release = t128_release, + .proc_name = "t128", + .show_info = t128_show_info, + .write_info = t128_write_info, + .info = t128_info, + .queuecommand = t128_queue_command, + .eh_abort_handler = t128_abort, + .eh_bus_reset_handler = t128_bus_reset, + .bios_param = t128_biosparam, + .can_queue = 32, + .this_id = 7, + .sg_tablesize = SG_ALL, + .cmd_per_lun = 2, + .use_clustering = DISABLE_CLUSTERING, + .cmd_size = NCR5380_CMD_SIZE, + .max_sectors = 128, }; #include "scsi_module.c" diff --git a/drivers/scsi/t128.h b/drivers/scsi/t128.h index 2c7371454dfd..dd16d85497e1 100644 --- a/drivers/scsi/t128.h +++ b/drivers/scsi/t128.h @@ -23,10 +23,6 @@ #ifndef T128_H #define T128_H -#define TDEBUG 0 -#define TDEBUG_INIT 0x1 -#define TDEBUG_TRANSFER 0x2 - /* * The trantor boards are memory mapped. They use an NCR5380 or * equivalent (my sample board had part second sourced from ZILOG). @@ -71,44 +67,18 @@ #define T_DATA_REG_OFFSET 0x1e00 /* rw 512 bytes long */ -#ifndef ASM - -#ifndef CMD_PER_LUN -#define CMD_PER_LUN 2 -#endif - -#ifndef CAN_QUEUE -#define CAN_QUEUE 32 -#endif - #define NCR5380_implementation_fields \ void __iomem *base -#define NCR5380_local_declare() \ - void __iomem *base - -#define NCR5380_setup(instance) \ - base = ((struct NCR5380_hostdata *)(instance->hostdata))->base +#define T128_address(reg) \ + (((struct NCR5380_hostdata *)shost_priv(instance))->base + T_5380_OFFSET + ((reg) * 0x20)) -#define T128_address(reg) (base + T_5380_OFFSET + ((reg) * 0x20)) - -#if !(TDEBUG & TDEBUG_TRANSFER) #define NCR5380_read(reg) readb(T128_address(reg)) #define NCR5380_write(reg, value) writeb((value),(T128_address(reg))) -#else -#define NCR5380_read(reg) \ - (((unsigned char) printk("scsi%d : read register %d at address %08x\n"\ - , instance->hostno, (reg), T128_address(reg))), readb(T128_address(reg))) - -#define NCR5380_write(reg, value) { \ - printk("scsi%d : write %02x to register %d at address %08x\n", \ - instance->hostno, (value), (reg), T128_address(reg)); \ - writeb((value), (T128_address(reg))); \ -} -#endif + +#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize) #define NCR5380_intr t128_intr -#define do_NCR5380_intr do_t128_intr #define NCR5380_queue_command t128_queue_command #define NCR5380_abort t128_abort #define NCR5380_bus_reset t128_bus_reset @@ -121,5 +91,4 @@ #define T128_IRQS 0xc4a8 -#endif /* ndef ASM */ #endif /* T128_H */ |