diff options
| -rw-r--r-- | drivers/ata/sata_sil24.c | 227 |
1 files changed, 206 insertions, 21 deletions
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c index b4f81eb8bbbe..03bfbb65c533 100644 --- a/drivers/ata/sata_sil24.c +++ b/drivers/ata/sata_sil24.c @@ -30,7 +30,7 @@ #include <linux/libata.h> #define DRV_NAME "sata_sil24" -#define DRV_VERSION "1.0" +#define DRV_VERSION "1.1" /* * Port request block (PRB) 32 bytes @@ -238,7 +238,7 @@ enum { SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA | - ATA_FLAG_AN, + ATA_FLAG_AN | ATA_FLAG_PMP, SIL24_COMMON_LFLAGS = ATA_LFLAG_SKIP_D2H_BSY, SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */ @@ -330,9 +330,14 @@ static u8 sil24_check_status(struct ata_port *ap); static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val); static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val); static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf); +static int sil24_qc_defer(struct ata_queued_cmd *qc); static void sil24_qc_prep(struct ata_queued_cmd *qc); static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc); static void sil24_irq_clear(struct ata_port *ap); +static void sil24_pmp_attach(struct ata_port *ap); +static void sil24_pmp_detach(struct ata_port *ap); +static int sil24_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val); +static int sil24_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val); static void sil24_freeze(struct ata_port *ap); static void sil24_thaw(struct ata_port *ap); static void sil24_error_handler(struct ata_port *ap); @@ -341,6 +346,7 @@ static int sil24_port_start(struct ata_port *ap); static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); #ifdef CONFIG_PM static int sil24_pci_device_resume(struct pci_dev *pdev); +static int sil24_port_resume(struct ata_port *ap); #endif static const struct pci_device_id sil24_pci_tbl[] = { @@ -393,7 +399,7 @@ static const struct ata_port_operations sil24_ops = { .tf_read = sil24_tf_read, - .qc_defer = ata_std_qc_defer, + .qc_defer = sil24_qc_defer, .qc_prep = sil24_qc_prep, .qc_issue = sil24_qc_issue, @@ -402,12 +408,21 @@ static const struct ata_port_operations sil24_ops = { .scr_read = sil24_scr_read, .scr_write = sil24_scr_write, + .pmp_attach = sil24_pmp_attach, + .pmp_detach = sil24_pmp_detach, + .pmp_read = sil24_pmp_read, + .pmp_write = sil24_pmp_write, + .freeze = sil24_freeze, .thaw = sil24_thaw, .error_handler = sil24_error_handler, .post_internal_cmd = sil24_post_internal_cmd, .port_start = sil24_port_start, + +#ifdef CONFIG_PM + .port_resume = sil24_port_resume, +#endif }; /* @@ -521,11 +536,40 @@ static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf) *tf = pp->tf; } +static void sil24_config_pmp(struct ata_port *ap, int attached) +{ + void __iomem *port = ap->ioaddr.cmd_addr; + + if (attached) + writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT); + else + writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR); +} + +static void sil24_clear_pmp(struct ata_port *ap) +{ + void __iomem *port = ap->ioaddr.cmd_addr; + int i; + + writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR); + + for (i = 0; i < SATA_PMP_MAX_PORTS; i++) { + void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE; + + writel(0, pmp_base + PORT_PMP_STATUS); + writel(0, pmp_base + PORT_PMP_QACTIVE); + } +} + static int sil24_init_port(struct ata_port *ap) { void __iomem *port = ap->ioaddr.cmd_addr; u32 tmp; + /* clear PMP error status */ + if (ap->nr_pmp_links) + sil24_clear_pmp(ap); + writel(PORT_CS_INIT, port + PORT_CTRL_STAT); ata_wait_register(port + PORT_CTRL_STAT, PORT_CS_INIT, PORT_CS_INIT, 10, 100); @@ -640,7 +684,7 @@ static int sil24_do_softreset(struct ata_link *link, unsigned int *class, static int sil24_softreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { - return sil24_do_softreset(link, class, 0, deadline); + return sil24_do_softreset(link, class, SATA_PMP_CTRL_PORT, deadline); } static int sil24_hardreset(struct ata_link *link, unsigned int *class, @@ -708,6 +752,38 @@ static inline void sil24_fill_sg(struct ata_queued_cmd *qc, } } +static int sil24_qc_defer(struct ata_queued_cmd *qc) +{ + struct ata_link *link = qc->dev->link; + struct ata_port *ap = link->ap; + u8 prot = qc->tf.protocol; + int is_atapi = (prot == ATA_PROT_ATAPI || + prot == ATA_PROT_ATAPI_NODATA || + prot == ATA_PROT_ATAPI_DMA); + + /* ATAPI commands completing with CHECK_SENSE cause various + * weird problems if other commands are active. PMP DMA CS + * errata doesn't cover all and HSM violation occurs even with + * only one other device active. Always run an ATAPI command + * by itself. + */ + if (unlikely(ap->excl_link)) { + if (link == ap->excl_link) { + if (ap->nr_active_links) + return ATA_DEFER_PORT; + qc->flags |= ATA_QCFLAG_CLEAR_EXCL; + } else + return ATA_DEFER_PORT; + } else if (unlikely(is_atapi)) { + ap->excl_link = link; + if (ap->nr_active_links) + return ATA_DEFER_PORT; + qc->flags |= ATA_QCFLAG_CLEAR_EXCL; + } + + return ata_std_qc_defer(qc); +} + static void sil24_qc_prep(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; @@ -751,7 +827,7 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc) } prb->ctrl = cpu_to_le16(ctrl); - ata_tf_to_fis(&qc->tf, 0, 1, prb->fis); + ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis); if (qc->flags & ATA_QCFLAG_DMAMAP) sil24_fill_sg(qc, sge); @@ -780,6 +856,65 @@ static void sil24_irq_clear(struct ata_port *ap) /* unused */ } +static void sil24_pmp_attach(struct ata_port *ap) +{ + sil24_config_pmp(ap, 1); + sil24_init_port(ap); +} + +static void sil24_pmp_detach(struct ata_port *ap) +{ + sil24_init_port(ap); + sil24_config_pmp(ap, 0); +} + +static int sil24_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val) +{ + struct ata_port *ap = dev->link->ap; + struct ata_taskfile tf; + int rc; + + sata_pmp_read_init_tf(&tf, dev, pmp, reg); + rc = sil24_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0, + SATA_PMP_SCR_TIMEOUT); + if (rc == 0) { + sil24_read_tf(ap, 0, &tf); + *r_val = sata_pmp_read_val(&tf); + } + return rc; +} + +static int sil24_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val) +{ + struct ata_port *ap = dev->link->ap; + struct ata_taskfile tf; + + sata_pmp_write_init_tf(&tf, dev, pmp, reg, val); + return sil24_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0, + SATA_PMP_SCR_TIMEOUT); +} + +static int sil24_pmp_softreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + return sil24_do_softreset(link, class, link->pmp, deadline); +} + +static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + int rc; + + rc = sil24_init_port(link->ap); + if (rc) { + ata_link_printk(link, KERN_ERR, + "hardreset failed (port not ready)\n"); + return rc; + } + + return sata_pmp_std_hardreset(link, class, deadline); +} + static void sil24_freeze(struct ata_port *ap) { void __iomem *port = ap->ioaddr.cmd_addr; @@ -807,8 +942,10 @@ static void sil24_error_intr(struct ata_port *ap) { void __iomem *port = ap->ioaddr.cmd_addr; struct sil24_port_priv *pp = ap->private_data; - struct ata_eh_info *ehi = &ap->link.eh_info; - int freeze = 0; + struct ata_queued_cmd *qc = NULL; + struct ata_link *link; + struct ata_eh_info *ehi; + int abort = 0, freeze = 0; u32 irq_stat; /* on error, we need to clear IRQ explicitly */ @@ -816,6 +953,8 @@ static void sil24_error_intr(struct ata_port *ap) writel(irq_stat, port + PORT_IRQ_STAT); /* first, analyze and record host port events */ + link = &ap->link; + ehi = &link->eh_info; ata_ehi_clear_desc(ehi); ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); @@ -844,8 +983,43 @@ static void sil24_error_intr(struct ata_port *ap) if (irq_stat & PORT_IRQ_ERROR) { struct sil24_cerr_info *ci = NULL; unsigned int err_mask = 0, action = 0; - struct ata_queued_cmd *qc; - u32 cerr; + u32 context, cerr; + int pmp; + + abort = 1; + + /* DMA Context Switch Failure in Port Multiplier Mode + * errata. If we have active commands to 3 or more + * devices, any error condition on active devices can + * corrupt DMA context switching. + */ + if (ap->nr_active_links >= 3) { + ehi->err_mask |= AC_ERR_OTHER; + ehi->action |= ATA_EH_HARDRESET; + ata_ehi_push_desc(ehi, "PMP DMA CS errata"); + freeze = 1; + } + + /* find out the offending link and qc */ + if (ap->nr_pmp_links) { + context = readl(port + PORT_CONTEXT); + pmp = (context >> 5) & 0xf; + + if (pmp < ap->nr_pmp_links) { + link = &ap->pmp_link[pmp]; + ehi = &link->eh_info; + qc = ata_qc_from_tag(ap, link->active_tag); + + ata_ehi_clear_desc(ehi); + ata_ehi_push_desc(ehi, "irq_stat 0x%08x", + irq_stat); + } else { + err_mask |= AC_ERR_HSM; + action |= ATA_EH_HARDRESET; + freeze = 1; + } + } else + qc = ata_qc_from_tag(ap, link->active_tag); /* analyze CMD_ERR */ cerr = readl(port + PORT_CMD_ERR); @@ -864,7 +1038,6 @@ static void sil24_error_intr(struct ata_port *ap) } /* record error info */ - qc = ata_qc_from_tag(ap, ap->link.active_tag); if (qc) { sil24_read_tf(ap, qc->tag, &pp->tf); qc->err_mask |= err_mask; @@ -872,13 +1045,21 @@ static void sil24_error_intr(struct ata_port *ap) ehi->err_mask |= err_mask; ehi->action |= action; + + /* if PMP, resume */ + if (ap->nr_pmp_links) + writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT); } /* freeze or abort */ if (freeze) ata_port_freeze(ap); - else - ata_port_abort(ap); + else if (abort) { + if (qc) + ata_link_abort(qc->dev->link); + else + ata_port_abort(ap); + } } static void sil24_finish_qc(struct ata_queued_cmd *qc) @@ -971,16 +1152,14 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance) static void sil24_error_handler(struct ata_port *ap) { - struct ata_eh_context *ehc = &ap->link.eh_context; - - if (sil24_init_port(ap)) { + if (sil24_init_port(ap)) ata_eh_freeze_port(ap); - ehc->i.action |= ATA_EH_HARDRESET; - } /* perform recovery */ - ata_do_eh(ap, ata_std_prereset, sil24_softreset, sil24_hardreset, - ata_std_postreset); + sata_pmp_do_eh(ap, ata_std_prereset, sil24_softreset, sil24_hardreset, + ata_std_postreset, sata_pmp_std_prereset, + sil24_pmp_softreset, sil24_pmp_hardreset, + sata_pmp_std_postreset); } static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) @@ -988,8 +1167,8 @@ static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) struct ata_port *ap = qc->ap; /* make DMA engine forget about the failed command */ - if (qc->flags & ATA_QCFLAG_FAILED) - sil24_init_port(ap); + if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap)) + ata_eh_freeze_port(ap); } static int sil24_port_start(struct ata_port *ap) @@ -1190,6 +1369,12 @@ static int sil24_pci_device_resume(struct pci_dev *pdev) return 0; } + +static int sil24_port_resume(struct ata_port *ap) +{ + sil24_config_pmp(ap, ap->nr_pmp_links); + return 0; +} #endif static int __init sil24_init(void) |