diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firewire/fw-sbp2.c | 66 |
1 files changed, 54 insertions, 12 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index 1efc67b1d26e..f96f19293dd1 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -37,6 +37,7 @@ #include <linux/dma-mapping.h> #include <linux/blkdev.h> #include <linux/string.h> +#include <linux/stringify.h> #include <linux/timer.h> #include <scsi/scsi.h> @@ -60,6 +61,46 @@ module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " "(default = Y, use N for concurrent initiators)"); +/* + * Flags for firmware oddities + * + * - 128kB max transfer + * Limit transfer size. Necessary for some old bridges. + * + * - 36 byte inquiry + * When scsi_mod probes the device, let the inquiry command look like that + * from MS Windows. + * + * - skip mode page 8 + * Suppress sending of mode_sense for mode page 8 if the device pretends to + * support the SCSI Primary Block commands instead of Reduced Block Commands. + * + * - fix capacity + * Tell sd_mod to correct the last sector number reported by read_capacity. + * Avoids access beyond actual disk limits on devices with an off-by-one bug. + * Don't use this with devices which don't have this bug. + * + * - override internal blacklist + * Instead of adding to the built-in blacklist, use only the workarounds + * specified in the module load parameter. + * Useful if a blacklist entry interfered with a non-broken device. + */ +#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 +#define SBP2_WORKAROUND_INQUIRY_36 0x2 +#define SBP2_WORKAROUND_MODE_SENSE_8 0x4 +#define SBP2_WORKAROUND_FIX_CAPACITY 0x8 +#define SBP2_WORKAROUND_OVERRIDE 0x100 + +static int sbp2_param_workarounds; +module_param_named(workarounds, sbp2_param_workarounds, int, 0644); +MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" + ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) + ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) + ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) + ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) + ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) + ", or a combination)"); + /* I don't know why the SCSI stack doesn't define something like this... */ typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); @@ -122,13 +163,6 @@ struct sbp2_target { #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 -/* Flags for detected oddities and brokeness */ -#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 -#define SBP2_WORKAROUND_INQUIRY_36 0x2 -#define SBP2_WORKAROUND_MODE_SENSE_8 0x4 -#define SBP2_WORKAROUND_FIX_CAPACITY 0x8 -#define SBP2_WORKAROUND_OVERRIDE 0x100 - /* Management orb opcodes */ #define SBP2_LOGIN_REQUEST 0x0 #define SBP2_QUERY_LOGINS_REQUEST 0x1 @@ -751,8 +785,15 @@ static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, u32 firmware_revision) { int i; + unsigned w = sbp2_param_workarounds; + + if (w) + fw_notify("Please notify linux1394-devel@lists.sourceforge.net " + "if you need the workarounds parameter for %s\n", + tgt->unit->device.bus_id); - tgt->workarounds = 0; + if (w & SBP2_WORKAROUND_OVERRIDE) + goto out; for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { @@ -764,15 +805,16 @@ static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, sbp2_workarounds_table[i].model != ~0) continue; - tgt->workarounds |= sbp2_workarounds_table[i].workarounds; + w |= sbp2_workarounds_table[i].workarounds; break; } - - if (tgt->workarounds) + out: + if (w) fw_notify("Workarounds for %s: 0x%x " "(firmware_revision 0x%06x, model_id 0x%06x)\n", tgt->unit->device.bus_id, - tgt->workarounds, firmware_revision, model); + w, firmware_revision, model); + tgt->workarounds = w; } static struct scsi_host_template scsi_driver_template; |