diff options
29 files changed, 4667 insertions, 1651 deletions
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 81803a16f986d..669ff6b99c4f7 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -164,7 +164,7 @@ ncr53c8xx-flags-$(CONFIG_SCSI_ZALON) \ CFLAGS_ncr53c8xx.o := $(ncr53c8xx-flags-y) $(ncr53c8xx-flags-m) zalon7xx-objs := zalon.o ncr53c8xx.o NCR_Q720_mod-objs := NCR_Q720.o ncr53c8xx.o -libata-objs := libata-core.o libata-scsi.o libata-bmdma.o +libata-objs := libata-core.o libata-scsi.o libata-bmdma.o libata-eh.o oktagon_esp_mod-objs := oktagon_esp.o oktagon_io.o # Files generated that shall be removed upon make clean diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index b4f8fb1d628b9..45fd71d801287 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -48,7 +48,7 @@ #include <asm/io.h> #define DRV_NAME "ahci" -#define DRV_VERSION "1.2" +#define DRV_VERSION "1.3" enum { @@ -56,12 +56,15 @@ enum { AHCI_MAX_SG = 168, /* hardware max is 64K */ AHCI_DMA_BOUNDARY = 0xffffffff, AHCI_USE_CLUSTERING = 0, - AHCI_CMD_SLOT_SZ = 32 * 32, + AHCI_MAX_CMDS = 32, + AHCI_CMD_SZ = 32, + AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ, AHCI_RX_FIS_SZ = 256, - AHCI_CMD_TBL_HDR = 0x80, AHCI_CMD_TBL_CDB = 0x40, - AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16), - AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ + + AHCI_CMD_TBL_HDR_SZ = 0x80, + AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16), + AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS, + AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ, AHCI_IRQ_ON_SG = (1 << 31), AHCI_CMD_ATAPI = (1 << 5), @@ -71,8 +74,10 @@ enum { AHCI_CMD_CLR_BUSY = (1 << 10), RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */ + RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */ board_ahci = 0, + board_ahci_vt8251 = 1, /* global controller registers */ HOST_CAP = 0x00, /* host capabilities */ @@ -87,8 +92,9 @@ enum { HOST_AHCI_EN = (1 << 31), /* AHCI enabled */ /* HOST_CAP bits */ - HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */ HOST_CAP_CLO = (1 << 24), /* Command List Override support */ + HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */ + HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */ /* registers for each SATA port */ PORT_LST_ADDR = 0x00, /* command list DMA addr */ @@ -127,15 +133,16 @@ enum { PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */ PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */ - PORT_IRQ_FATAL = PORT_IRQ_TF_ERR | - PORT_IRQ_HBUS_ERR | - PORT_IRQ_HBUS_DATA_ERR | - PORT_IRQ_IF_ERR, - DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY | - PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE | - PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS | - PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS | - PORT_IRQ_D2H_REG_FIS, + PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR | + PORT_IRQ_IF_ERR | + PORT_IRQ_CONNECT | + PORT_IRQ_UNK_FIS, + PORT_IRQ_ERROR = PORT_IRQ_FREEZE | + PORT_IRQ_TF_ERR | + PORT_IRQ_HBUS_DATA_ERR, + DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE | + PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS | + PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS, /* PORT_CMD bits */ PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */ @@ -153,6 +160,9 @@ enum { /* hpriv->flags bits */ AHCI_FLAG_MSI = (1 << 0), + + /* ap->flags bits */ + AHCI_FLAG_RESET_NEEDS_CLO = (1 << 24), }; struct ahci_cmd_hdr { @@ -181,7 +191,6 @@ struct ahci_port_priv { dma_addr_t cmd_slot_dma; void *cmd_tbl; dma_addr_t cmd_tbl_dma; - struct ahci_sg *cmd_tbl_sg; void *rx_fis; dma_addr_t rx_fis_dma; }; @@ -193,13 +202,15 @@ static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc); static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs); static int ahci_probe_reset(struct ata_port *ap, unsigned int *classes); static void ahci_irq_clear(struct ata_port *ap); -static void ahci_eng_timeout(struct ata_port *ap); static int ahci_port_start(struct ata_port *ap); static void ahci_port_stop(struct ata_port *ap); static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf); static void ahci_qc_prep(struct ata_queued_cmd *qc); static u8 ahci_check_status(struct ata_port *ap); -static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); +static void ahci_freeze(struct ata_port *ap); +static void ahci_thaw(struct ata_port *ap); +static void ahci_error_handler(struct ata_port *ap); +static void ahci_post_internal_cmd(struct ata_queued_cmd *qc); static void ahci_remove_one (struct pci_dev *pdev); static struct scsi_host_template ahci_sht = { @@ -207,7 +218,8 @@ static struct scsi_host_template ahci_sht = { .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, - .can_queue = ATA_DEF_QUEUE, + .change_queue_depth = ata_scsi_change_queue_depth, + .can_queue = AHCI_MAX_CMDS - 1, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = AHCI_MAX_SG, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, @@ -233,14 +245,18 @@ static const struct ata_port_operations ahci_ops = { .qc_prep = ahci_qc_prep, .qc_issue = ahci_qc_issue, - .eng_timeout = ahci_eng_timeout, - .irq_handler = ahci_interrupt, .irq_clear = ahci_irq_clear, .scr_read = ahci_scr_read, .scr_write = ahci_scr_write, + .freeze = ahci_freeze, + .thaw = ahci_thaw, + + .error_handler = ahci_error_handler, + .post_internal_cmd = ahci_post_internal_cmd, + .port_start = ahci_port_start, .port_stop = ahci_port_stop, }; @@ -255,6 +271,16 @@ static const struct ata_port_info ahci_port_info[] = { .udma_mask = 0x7f, /* udma0-6 ; FIXME */ .port_ops = &ahci_ops, }, + /* board_ahci_vt8251 */ + { + .sht = &ahci_sht, + .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | + ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | + AHCI_FLAG_RESET_NEEDS_CLO, + .pio_mask = 0x1f, /* pio0-4 */ + .udma_mask = 0x7f, /* udma0-6 ; FIXME */ + .port_ops = &ahci_ops, + }, }; static const struct pci_device_id ahci_pci_tbl[] = { @@ -296,6 +322,8 @@ static const struct pci_device_id ahci_pci_tbl[] = { board_ahci }, /* ATI SB600 non-raid */ { PCI_VENDOR_ID_ATI, 0x4381, PCI_ANY_ID, PCI_ANY_ID, 0, 0, board_ahci }, /* ATI SB600 raid */ + { PCI_VENDOR_ID_VIA, 0x3349, PCI_ANY_ID, PCI_ANY_ID, 0, 0, + board_ahci_vt8251 }, /* VIA VT8251 */ { } /* terminate list */ }; @@ -374,8 +402,6 @@ static int ahci_port_start(struct ata_port *ap) pp->cmd_tbl = mem; pp->cmd_tbl_dma = mem_dma; - pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR; - ap->private_data = pp; if (hpriv->cap & HOST_CAP_64) @@ -508,46 +534,60 @@ static unsigned int ahci_dev_classify(struct ata_port *ap) return ata_dev_classify(&tf); } -static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, u32 opts) +static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, + u32 opts) { - pp->cmd_slot[0].opts = cpu_to_le32(opts); - pp->cmd_slot[0].status = 0; - pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff); - pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16); + dma_addr_t cmd_tbl_dma; + + cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ; + + pp->cmd_slot[tag].opts = cpu_to_le32(opts); + pp->cmd_slot[tag].status = 0; + pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff); + pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16); } -static int ahci_poll_register(void __iomem *reg, u32 mask, u32 val, - unsigned long interval_msec, - unsigned long timeout_msec) +static int ahci_clo(struct ata_port *ap) { - unsigned long timeout; + void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr; + struct ahci_host_priv *hpriv = ap->host_set->private_data; u32 tmp; - timeout = jiffies + (timeout_msec * HZ) / 1000; - do { - tmp = readl(reg); - if ((tmp & mask) == val) - return 0; - msleep(interval_msec); - } while (time_before(jiffies, timeout)); + if (!(hpriv->cap & HOST_CAP_CLO)) + return -EOPNOTSUPP; + + tmp = readl(port_mmio + PORT_CMD); + tmp |= PORT_CMD_CLO; + writel(tmp, port_mmio + PORT_CMD); + + tmp = ata_wait_register(port_mmio + PORT_CMD, + PORT_CMD_CLO, PORT_CMD_CLO, 1, 500); + if (tmp & PORT_CMD_CLO) + return -EIO; - return -1; + return 0; } -static int ahci_softreset(struct ata_port *ap, int verbose, unsigned int *class) +static int ahci_softreset(struct ata_port *ap, unsigned int *class) { - struct ahci_host_priv *hpriv = ap->host_set->private_data; struct ahci_port_priv *pp = ap->private_data; void __iomem *mmio = ap->host_set->mmio_base; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); const u32 cmd_fis_len = 5; /* five dwords */ const char *reason = NULL; struct ata_taskfile tf; + u32 tmp; u8 *fis; int rc; DPRINTK("ENTER\n"); + if (ata_port_offline(ap)) { + DPRINTK("PHY reports no device\n"); + *class = ATA_DEV_NONE; + return 0; + } + /* prepare for SRST (AHCI-1.1 10.4.1) */ rc = ahci_stop_engine(ap); if (rc) { @@ -558,23 +598,13 @@ static int ahci_softreset(struct ata_port *ap, int verbose, unsigned int *class) /* check BUSY/DRQ, perform Command List Override if necessary */ ahci_tf_read(ap, &tf); if (tf.command & (ATA_BUSY | ATA_DRQ)) { - u32 tmp; + rc = ahci_clo(ap); - if (!(hpriv->cap & HOST_CAP_CLO)) { - rc = -EIO; - reason = "port busy but no CLO"; + if (rc == -EOPNOTSUPP) { + reason = "port busy but CLO unavailable"; goto fail_restart; - } - - tmp = readl(port_mmio + PORT_CMD); - tmp |= PORT_CMD_CLO; - writel(tmp, port_mmio + PORT_CMD); - readl(port_mmio + PORT_CMD); /* flush */ - - if (ahci_poll_register(port_mmio + PORT_CMD, PORT_CMD_CLO, 0x0, - 1, 500)) { - rc = -EIO; - reason = "CLO failed"; + } else if (rc) { + reason = "port busy but CLO failed"; goto fail_restart; } } @@ -582,20 +612,21 @@ static int ahci_softreset(struct ata_port *ap, int verbose, unsigned int *class) /* restart engine */ ahci_start_engine(ap); - ata_tf_init(ap, &tf, 0); + ata_tf_init(ap->device, &tf); fis = pp->cmd_tbl; /* issue the first D2H Register FIS */ - ahci_fill_cmd_slot(pp, cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY); + ahci_fill_cmd_slot(pp, 0, + cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY); tf.ctl |= ATA_SRST; ata_tf_to_fis(&tf, fis, 0); fis[1] &= ~(1 << 7); /* turn off Command FIS bit */ writel(1, port_mmio + PORT_CMD_ISSUE); - readl(port_mmio + PORT_CMD_ISSUE); /* flush */ - if (ahci_poll_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x0, 1, 500)) { + tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500); + if (tmp & 0x1) { rc = -EIO; reason = "1st FIS failed"; goto fail; @@ -605,7 +636,7 @@ static int ahci_softreset(struct ata_port *ap, int verbose, unsigned int *class) msleep(1); /* issue the second D2H Register FIS */ - ahci_fill_cmd_slot(pp, cmd_fis_len); + ahci_fill_cmd_slot(pp, 0, cmd_fis_len); tf.ctl &= ~ATA_SRST; ata_tf_to_fis(&tf, fis, 0); @@ -625,7 +656,7 @@ static int ahci_softreset(struct ata_port *ap, int verbose, unsigned int *class) msleep(150); *class = ATA_DEV_NONE; - if (sata_dev_present(ap)) { + if (ata_port_online(ap)) { if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { rc = -EIO; reason = "device not ready"; @@ -640,25 +671,21 @@ static int ahci_softreset(struct ata_port *ap, int verbose, unsigned int *class) fail_restart: ahci_start_engine(ap); fail: - if (verbose) - printk(KERN_ERR "ata%u: softreset failed (%s)\n", - ap->id, reason); - else - DPRINTK("EXIT, rc=%d reason=\"%s\"\n", rc, reason); + ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason); return rc; } -static int ahci_hardreset(struct ata_port *ap, int verbose, unsigned int *class) +static int ahci_hardreset(struct ata_port *ap, unsigned int *class) { int rc; DPRINTK("ENTER\n"); ahci_stop_engine(ap); - rc = sata_std_hardreset(ap, verbose, class); + rc = sata_std_hardreset(ap, class); ahci_start_engine(ap); - if (rc == 0) + if (rc == 0 && ata_port_online(ap)) *class = ahci_dev_classify(ap); if (*class == ATA_DEV_UNKNOWN) *class = ATA_DEV_NONE; @@ -688,6 +715,12 @@ static void ahci_postreset(struct ata_port *ap, unsigned int *class) static int ahci_probe_reset(struct ata_port *ap, unsigned int *classes) { + if ((ap->flags & AHCI_FLAG_RESET_NEEDS_CLO) && + (ata_busy_wait(ap, ATA_BUSY, 1000) & ATA_BUSY)) { + /* ATA_BUSY hasn't cleared, so send a CLO */ + ahci_clo(ap); + } + return ata_drive_probe_reset(ap, ata_std_probeinit, ahci_softreset, ahci_hardreset, ahci_postreset, classes); @@ -708,9 +741,8 @@ static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf) ata_tf_from_fis(d2h_fis, tf); } -static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc) +static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl) { - struct ahci_port_priv *pp = qc->ap->private_data; struct scatterlist *sg; struct ahci_sg *ahci_sg; unsigned int n_sg = 0; @@ -720,7 +752,7 @@ static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc) /* * Next, the S/G list. */ - ahci_sg = pp->cmd_tbl_sg; + ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ; ata_for_each_sg(sg, qc) { dma_addr_t addr = sg_dma_address(sg); u32 sg_len = sg_dma_len(sg); @@ -741,6 +773,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc) struct ata_port *ap = qc->ap; struct ahci_port_priv *pp = ap->private_data; int is_atapi = is_atapi_taskfile(&qc->tf); + void *cmd_tbl; u32 opts; const u32 cmd_fis_len = 5; /* five dwords */ unsigned int n_elem; @@ -749,16 +782,17 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc) * Fill in command table information. First, the header, * a SATA Register - Host to Device command FIS. */ - ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0); + cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ; + + ata_tf_to_fis(&qc->tf, cmd_tbl, 0); if (is_atapi) { - memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); - memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, - qc->dev->cdb_len); + memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); + memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len); } n_elem = 0; if (qc->flags & ATA_QCFLAG_DMAMAP) - n_elem = ahci_fill_sg(qc); + n_elem = ahci_fill_sg(qc, cmd_tbl); /* * Fill in command slot information. @@ -769,112 +803,123 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc) if (is_atapi) opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; - ahci_fill_cmd_slot(pp, opts); + ahci_fill_cmd_slot(pp, qc->tag, opts); } -static void ahci_restart_port(struct ata_port *ap, u32 irq_stat) +static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) { - void __iomem *mmio = ap->host_set->mmio_base; - void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); - u32 tmp; + struct ahci_port_priv *pp = ap->private_data; + struct ata_eh_info *ehi = &ap->eh_info; + unsigned int err_mask = 0, action = 0; + struct ata_queued_cmd *qc; + u32 serror; - if ((ap->device[0].class != ATA_DEV_ATAPI) || - ((irq_stat & PORT_IRQ_TF_ERR) == 0)) - printk(KERN_WARNING "ata%u: port reset, " - "p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n", - ap->id, - irq_stat, - readl(mmio + HOST_IRQ_STAT), - readl(port_mmio + PORT_IRQ_STAT), - readl(port_mmio + PORT_CMD), - readl(port_mmio + PORT_TFDATA), - readl(port_mmio + PORT_SCR_STAT), - readl(port_mmio + PORT_SCR_ERR)); - - /* stop DMA */ - ahci_stop_engine(ap); + ata_ehi_clear_desc(ehi); - /* clear SATA phy error, if any */ - tmp = readl(port_mmio + PORT_SCR_ERR); - writel(tmp, port_mmio + PORT_SCR_ERR); + /* AHCI needs SError cleared; otherwise, it might lock up */ + serror = ahci_scr_read(ap, SCR_ERROR); + ahci_scr_write(ap, SCR_ERROR, serror); - /* if DRQ/BSY is set, device needs to be reset. - * if so, issue COMRESET - */ - tmp = readl(port_mmio + PORT_TFDATA); - if (tmp & (ATA_BUSY | ATA_DRQ)) { - writel(0x301, port_mmio + PORT_SCR_CTL); - readl(port_mmio + PORT_SCR_CTL); /* flush */ - udelay(10); - writel(0x300, port_mmio + PORT_SCR_CTL); - readl(port_mmio + PORT_SCR_CTL); /* flush */ + /* analyze @irq_stat */ + ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); + + if (irq_stat & PORT_IRQ_TF_ERR) + err_mask |= AC_ERR_DEV; + + if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) { + err_mask |= AC_ERR_HOST_BUS; + action |= ATA_EH_SOFTRESET; } - /* re-start DMA */ - ahci_start_engine(ap); -} + if (irq_stat & PORT_IRQ_IF_ERR) { + err_mask |= AC_ERR_ATA_BUS; + action |= ATA_EH_SOFTRESET; + ata_ehi_push_desc(ehi, ", interface fatal error"); + } -static void ahci_eng_timeout(struct ata_port *ap) -{ - struct ata_host_set *host_set = ap->host_set; - void __iomem *mmio = host_set->mmio_base; - void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); - struct ata_queued_cmd *qc; - unsigned long flags; + if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) { + err_mask |= AC_ERR_ATA_BUS; + action |= ATA_EH_SOFTRESET; + ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ? + "connection status changed" : "PHY RDY changed"); + } - printk(KERN_WARNING "ata%u: handling error/timeout\n", ap->id); + if (irq_stat & PORT_IRQ_UNK_FIS) { + u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK); - spin_lock_irqsave(&host_set->lock, flags); + err_mask |= AC_ERR_HSM; + action |= ATA_EH_SOFTRESET; + ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x", + unk[0], unk[1], unk[2], unk[3]); + } - ahci_restart_port(ap, readl(port_mmio + PORT_IRQ_STAT)); - qc = ata_qc_from_tag(ap, ap->active_tag); - qc->err_mask |= AC_ERR_TIMEOUT; + /* okay, let's hand over to EH */ + ehi->serror |= serror; + ehi->action |= action; - spin_unlock_irqrestore(&host_set->lock, flags); + qc = ata_qc_from_tag(ap, ap->active_tag); + if (qc) + qc->err_mask |= err_mask; + else + ehi->err_mask |= err_mask; - ata_eh_qc_complete(qc); + if (irq_stat & PORT_IRQ_FREEZE) + ata_port_freeze(ap); + else + ata_port_abort(ap); } -static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc) +static void ahci_host_intr(struct ata_port *ap) { void __iomem *mmio = ap->host_set->mmio_base; void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); - u32 status, serr, ci; - - serr = readl(port_mmio + PORT_SCR_ERR); - writel(serr, port_mmio + PORT_SCR_ERR); + struct ata_eh_info *ehi = &ap->eh_info; + u32 status, qc_active; + int rc; status = readl(port_mmio + PORT_IRQ_STAT); writel(status, port_mmio + PORT_IRQ_STAT); - ci = readl(port_mmio + PORT_CMD_ISSUE); - if (likely((ci & 0x1) == 0)) { - if (qc) { - WARN_ON(qc->err_mask); - ata_qc_complete(qc); - qc = NULL; - } + if (unlikely(status & PORT_IRQ_ERROR)) { + ahci_error_intr(ap, status); + return; } - if (status & PORT_IRQ_FATAL) { - unsigned int err_mask; - if (status & PORT_IRQ_TF_ERR) - err_mask = AC_ERR_DEV; - else if (status & PORT_IRQ_IF_ERR) - err_mask = AC_ERR_ATA_BUS; - else - err_mask = AC_ERR_HOST_BUS; - - /* command processing has stopped due to error; restart */ - ahci_restart_port(ap, status); - - if (qc) { - qc->err_mask |= err_mask; - ata_qc_complete(qc); - } + if (ap->sactive) + qc_active = readl(port_mmio + PORT_SCR_ACT); + else + qc_active = readl(port_mmio + PORT_CMD_ISSUE); + + rc = ata_qc_complete_multiple(ap, qc_active, NULL); + if (rc > 0) + return; + if (rc < 0) { + ehi->err_mask |= AC_ERR_HSM; + ehi->action |= ATA_EH_SOFTRESET; + ata_port_freeze(ap); + return; + } + + /* hmmm... a spurious interupt */ + + /* some devices send D2H reg with I bit set during NCQ command phase */ + if (ap->sactive && status & PORT_IRQ_D2H_REG_FIS) + return; + + /* ignore interim PIO setup fis interrupts */ + if (ata_tag_valid(ap->active_tag)) { + struct ata_queued_cmd *qc = + ata_qc_from_tag(ap, ap->active_tag); + + if (qc && qc->tf.protocol == ATA_PROT_PIO && + (status & PORT_IRQ_PIOS_FIS)) + return; } - return 1; + if (ata_ratelimit()) + ata_port_printk(ap, KERN_INFO, "spurious interrupt " + "(irq_stat 0x%x active_tag %d sactive 0x%x)\n", + status, ap->active_tag, ap->sactive); } static void ahci_irq_clear(struct ata_port *ap) @@ -882,7 +927,7 @@ static void ahci_irq_clear(struct ata_port *ap) /* TODO */ } -static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs) +static irqreturn_t ahci_interrupt(int irq, void *dev_instance, struct pt_regs *regs) { struct ata_host_set *host_set = dev_instance; struct ahci_host_priv *hpriv; @@ -911,14 +956,7 @@ static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs * ap = host_set->ports[i]; if (ap) { - struct ata_queued_cmd *qc; - qc = ata_qc_from_tag(ap, ap->active_tag); - if (!ahci_host_intr(ap, qc)) - if (ata_ratelimit()) - dev_printk(KERN_WARNING, host_set->dev, - "unhandled interrupt on port %u\n", - i); - + ahci_host_intr(ap); VPRINTK("port %u\n", i); } else { VPRINTK("port %u (no irq)\n", i); @@ -935,7 +973,7 @@ static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs * handled = 1; } - spin_unlock(&host_set->lock); + spin_unlock(&host_set->lock); VPRINTK("EXIT\n"); @@ -947,12 +985,64 @@ static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) struct ata_port *ap = qc->ap; void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr; - writel(1, port_mmio + PORT_CMD_ISSUE); + if (qc->tf.protocol == ATA_PROT_NCQ) + writel(1 << qc->tag, port_mmio + PORT_SCR_ACT); + writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE); readl(port_mmio + PORT_CMD_ISSUE); /* flush */ return 0; } +static void ahci_freeze(struct ata_port *ap) +{ + void __iomem *mmio = ap->host_set->mmio_base; + void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); + + /* turn IRQ off */ + writel(0, port_mmio + PORT_IRQ_MASK); +} + +static void ahci_thaw(struct ata_port *ap) +{ + void __iomem *mmio = ap->host_set->mmio_base; + void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no); + u32 tmp; + + /* clear IRQ */ + tmp = readl(port_mmio + PORT_IRQ_STAT); + writel(tmp, port_mmio + PORT_IRQ_STAT); + writel(1 << ap->id, mmio + HOST_IRQ_STAT); + + /* turn IRQ back on */ + writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK); +} + +static void ahci_error_handler(struct ata_port *ap) +{ + if (!(ap->flags & ATA_FLAG_FROZEN)) { + /* restart engine */ + ahci_stop_engine(ap); + ahci_start_engine(ap); + } + + /* perform recovery */ + ata_do_eh(ap, ahci_softreset, ahci_hardreset, ahci_postreset); +} + +static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + + if (qc->flags & ATA_QCFLAG_FAILED) + qc->err_mask |= AC_ERR_OTHER; + + if (qc->err_mask) { + /* make DMA engine forget about the failed command */ + ahci_stop_engine(ap); + ahci_start_engine(ap); + } +} + static void ahci_setup_port(struct ata_ioports *port, unsigned long base, unsigned int port_idx) { @@ -1097,9 +1187,6 @@ static int ahci_host_init(struct ata_probe_ent *probe_ent) writel(tmp, port_mmio + PORT_IRQ_STAT); writel(1 << i, mmio + HOST_IRQ_STAT); - - /* set irq mask (enables interrupts) */ - writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK); } tmp = readl(mmio + HOST_CTL); @@ -1197,6 +1284,8 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) VPRINTK("ENTER\n"); + WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS); + if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); @@ -1264,6 +1353,9 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) if (rc) goto err_out_hpriv; + if (hpriv->cap & HOST_CAP_NCQ) + probe_ent->host_flags |= ATA_FLAG_NCQ; + ahci_print_info(probe_ent); /* FIXME: check ata_device_add return value */ diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 6dc88149f9f15..28bd8cae52cea 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -93,7 +93,7 @@ #include <linux/libata.h> #define DRV_NAME "ata_piix" -#define DRV_VERSION "1.05" +#define DRV_VERSION "1.10" enum { PIIX_IOCFG = 0x54, /* IDE I/O configuration register */ @@ -159,6 +159,7 @@ static const struct pci_device_id piix_pci_tbl[] = { { 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix4_pata }, { 0x8086, 0x24db, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata }, { 0x8086, 0x25a2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata }, + { 0x8086, 0x27df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata }, #endif /* NOTE: The following PCI ids must be kept in sync with the @@ -243,7 +244,10 @@ static const struct ata_port_operations piix_pata_ops = { .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, - .eng_timeout = ata_eng_timeout, + .freeze = ata_bmdma_freeze, + .thaw = ata_bmdma_thaw, + .error_handler = ata_bmdma_error_handler, + .post_internal_cmd = ata_bmdma_post_internal_cmd, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, @@ -271,7 +275,10 @@ static const struct ata_port_operations piix_sata_ops = { .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, - .eng_timeout = ata_eng_timeout, + .freeze = ata_bmdma_freeze, + .thaw = ata_bmdma_thaw, + .error_handler = ata_bmdma_error_handler, + .post_internal_cmd = ata_bmdma_post_internal_cmd, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, @@ -484,7 +491,7 @@ static int piix_pata_probe_reset(struct ata_port *ap, unsigned int *classes) struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->hard_port_no])) { - printk(KERN_INFO "ata%u: port disabled. ignoring.\n", ap->id); + ata_port_printk(ap, KERN_INFO, "port disabled. ignoring.\n"); return 0; } @@ -565,7 +572,7 @@ static unsigned int piix_sata_probe (struct ata_port *ap) static int piix_sata_probe_reset(struct ata_port *ap, unsigned int *classes) { if (!piix_sata_probe(ap)) { - printk(KERN_INFO "ata%u: SATA port has no device.\n", ap->id); + ata_port_printk(ap, KERN_INFO, "SATA port has no device.\n"); return 0; } diff --git a/drivers/scsi/libata-bmdma.c b/drivers/scsi/libata-bmdma.c index 835dff0bafdc9..6d30d2c529602 100644 --- a/drivers/scsi/libata-bmdma.c +++ b/drivers/scsi/libata-bmdma.c @@ -652,6 +652,149 @@ void ata_bmdma_stop(struct ata_queued_cmd *qc) ata_altstatus(ap); /* dummy read */ } +/** + * ata_bmdma_freeze - Freeze BMDMA controller port + * @ap: port to freeze + * + * Freeze BMDMA controller port. + * + * LOCKING: + * Inherited from caller. + */ +void ata_bmdma_freeze(struct ata_port *ap) +{ + struct ata_ioports *ioaddr = &ap->ioaddr; + + ap->ctl |= ATA_NIEN; + ap->last_ctl = ap->ctl; + + if (ap->flags & ATA_FLAG_MMIO) + writeb(ap->ctl, (void __iomem *)ioaddr->ctl_addr); + else + outb(ap->ctl, ioaddr->ctl_addr); +} + +/** + * ata_bmdma_thaw - Thaw BMDMA controller port + * @ap: port to thaw + * + * Thaw BMDMA controller port. + * + * LOCKING: + * Inherited from caller. + */ +void ata_bmdma_thaw(struct ata_port *ap) +{ + /* clear & re-enable interrupts */ + ata_chk_status(ap); + ap->ops->irq_clear(ap); + if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ + ata_irq_on(ap); +} + +/** + * ata_bmdma_drive_eh - Perform EH with given methods for BMDMA controller + * @ap: port to handle error for + * @softreset: softreset method (can be NULL) + * @hardreset: hardreset method (can be NULL) + * @postreset: postreset method (can be NULL) + * + * Handle error for ATA BMDMA controller. It can handle both + * PATA and SATA controllers. Many controllers should be able to + * use this EH as-is or with some added handling before and + * after. + * + * This function is intended to be used for constructing + * ->error_handler callback by low level drivers. + * + * LOCKING: + * Kernel thread context (may sleep) + */ +void ata_bmdma_drive_eh(struct ata_port *ap, ata_reset_fn_t softreset, + ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) +{ + struct ata_host_set *host_set = ap->host_set; + struct ata_eh_context *ehc = &ap->eh_context; + struct ata_queued_cmd *qc; + unsigned long flags; + int thaw = 0; + + qc = __ata_qc_from_tag(ap, ap->active_tag); + if (qc && !(qc->flags & ATA_QCFLAG_FAILED)) + qc = NULL; + + /* reset PIO HSM and stop DMA engine */ + spin_lock_irqsave(&host_set->lock, flags); + + ap->hsm_task_state = HSM_ST_IDLE; + + if (qc && (qc->tf.protocol == ATA_PROT_DMA || + qc->tf.protocol == ATA_PROT_ATAPI_DMA)) { + u8 host_stat; + + host_stat = ata_bmdma_status(ap); + + ata_ehi_push_desc(&ehc->i, "BMDMA stat 0x%x", host_stat); + + /* BMDMA controllers indicate host bus error by + * setting DMA_ERR bit and timing out. As it wasn't + * really a timeout event, adjust error mask and + * cancel frozen state. + */ + if (qc->err_mask == AC_ERR_TIMEOUT && host_stat & ATA_DMA_ERR) { + qc->err_mask = AC_ERR_HOST_BUS; + thaw = 1; + } + + ap->ops->bmdma_stop(qc); + } + + ata_altstatus(ap); + ata_chk_status(ap); + ap->ops->irq_clear(ap); + + spin_unlock_irqrestore(&host_set->lock, flags); + + if (thaw) + ata_eh_thaw_port(ap); + + /* PIO and DMA engines have been stopped, perform recovery */ + ata_do_eh(ap, softreset, hardreset, postreset); +} + +/** + * ata_bmdma_error_handler - Stock error handler for BMDMA controller + * @ap: port to handle error for + * + * Stock error handler for BMDMA controller. + * + * LOCKING: + * Kernel thread context (may sleep) + */ +void ata_bmdma_error_handler(struct ata_port *ap) +{ + ata_reset_fn_t hardreset; + + hardreset = NULL; + if (sata_scr_valid(ap)) + hardreset = sata_std_hardreset; + + ata_bmdma_drive_eh(ap, ata_std_softreset, hardreset, ata_std_postreset); +} + +/** + * ata_bmdma_post_internal_cmd - Stock post_internal_cmd for + * BMDMA controller + * @qc: internal command to clean up + * + * LOCKING: + * Kernel thread context (may sleep) + */ +void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc) +{ + ata_bmdma_stop(qc); +} + #ifdef CONFIG_PCI static struct ata_probe_ent * ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 823dfa78c0ba5..bf00d2b2e404c 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -61,14 +61,10 @@ #include "libata.h" -static unsigned int ata_dev_init_params(struct ata_port *ap, - struct ata_device *dev, - u16 heads, - u16 sectors); -static void ata_set_mode(struct ata_port *ap); -static unsigned int ata_dev_set_xfermode(struct ata_port *ap, - struct ata_device *dev); -static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev); +static unsigned int ata_dev_init_params(struct ata_device *dev, + u16 heads, u16 sectors); +static unsigned int ata_dev_set_xfermode(struct ata_device *dev); +static void ata_dev_xfermask(struct ata_device *dev); static unsigned int ata_unique_id = 1; static struct workqueue_struct *ata_wq; @@ -77,6 +73,10 @@ int atapi_enabled = 1; module_param(atapi_enabled, int, 0444); MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); +int atapi_dmadir = 0; +module_param(atapi_dmadir, int, 0444); +MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); + int libata_fua = 0; module_param_named(fua, libata_fua, int, 0444); MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); @@ -397,11 +397,22 @@ static const char *ata_mode_string(unsigned int xfer_mask) return "<n/a>"; } -static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev) +static const char *sata_spd_string(unsigned int spd) +{ + static const char * const spd_str[] = { + "1.5 Gbps", + "3.0 Gbps", + }; + + if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) + return "<unknown>"; + return spd_str[spd - 1]; +} + +void ata_dev_disable(struct ata_device *dev) { - if (ata_dev_present(dev)) { - printk(KERN_WARNING "ata%u: dev %u disabled\n", - ap->id, dev->devno); + if (ata_dev_enabled(dev)) { + ata_dev_printk(dev, KERN_WARNING, "disabled\n"); dev->class++; } } @@ -943,15 +954,14 @@ void ata_qc_complete_internal(struct ata_queued_cmd *qc) { struct completion *waiting = qc->private_data; - qc->ap->ops->tf_read(qc->ap, &qc->tf); complete(waiting); } /** * ata_exec_internal - execute libata internal command - * @ap: Port to which the command is sent * @dev: Device to which the command is sent * @tf: Taskfile registers for the command and the result + * @cdb: CDB for packet command * @dma_dir: Data tranfer direction of the command * @buf: Data buffer of the command * @buflen: Length of data buffer @@ -966,23 +976,62 @@ void ata_qc_complete_internal(struct ata_queued_cmd *qc) * None. Should be called with kernel context, might sleep. */ -static unsigned -ata_exec_internal(struct ata_port *ap, struct ata_device *dev, - struct ata_taskfile *tf, - int dma_dir, void *buf, unsigned int buflen) +unsigned ata_exec_internal(struct ata_device *dev, + struct ata_taskfile *tf, const u8 *cdb, + int dma_dir, void *buf, unsigned int buflen) { + struct ata_port *ap = dev->ap; u8 command = tf->command; struct ata_queued_cmd *qc; + unsigned int tag, preempted_tag; + u32 preempted_sactive, preempted_qc_active; DECLARE_COMPLETION(wait); unsigned long flags; unsigned int err_mask; + int rc; spin_lock_irqsave(&ap->host_set->lock, flags); - qc = ata_qc_new_init(ap, dev); - BUG_ON(qc == NULL); + /* no internal command while frozen */ + if (ap->flags & ATA_FLAG_FROZEN) { + spin_unlock_irqrestore(&ap->host_set->lock, flags); + return AC_ERR_SYSTEM; + } + /* initialize internal qc */ + + /* XXX: Tag 0 is used for drivers with legacy EH as some + * drivers choke if any other tag is given. This breaks + * ata_tag_internal() test for those drivers. Don't use new + * EH stuff without converting to it. + */ + if (ap->ops->error_handler) + tag = ATA_TAG_INTERNAL; + else + tag = 0; + + if (test_and_set_bit(tag, &ap->qc_allocated)) + BUG(); + qc = __ata_qc_from_tag(ap, tag); + + qc->tag = tag; + qc->scsicmd = NULL; + qc->ap = ap; + qc->dev = dev; + ata_qc_reinit(qc); + + preempted_tag = ap->active_tag; + preempted_sactive = ap->sactive; + preempted_qc_active = ap->qc_active; + ap->active_tag = ATA_TAG_POISON; + ap->sactive = 0; + ap->qc_active = 0; + + /* prepare & issue qc */ qc->tf = *tf; + if (cdb) + memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); + qc->flags |= ATA_QCFLAG_RESULT_TF; qc->dma_dir = dma_dir; if (dma_dir != DMA_NONE) { ata_sg_init_one(qc, buf, buflen); @@ -996,31 +1045,53 @@ ata_exec_internal(struct ata_port *ap, struct ata_device *dev, spin_unlock_irqrestore(&ap->host_set->lock, flags); - if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) { - ata_port_flush_task(ap); + rc = wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL); + ata_port_flush_task(ap); + + if (!rc) { spin_lock_irqsave(&ap->host_set->lock, flags); /* We're racing with irq here. If we lose, the * following test prevents us from completing the qc - * again. If completion irq occurs after here but - * before the caller cleans up, it will result in a - * spurious interrupt. We can live with that. + * twice. If we win, the port is frozen and will be + * cleaned up by ->post_internal_cmd(). */ if (qc->flags & ATA_QCFLAG_ACTIVE) { - qc->err_mask = AC_ERR_TIMEOUT; - ata_qc_complete(qc); - printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n", - ap->id, command); + qc->err_mask |= AC_ERR_TIMEOUT; + + if (ap->ops->error_handler) + ata_port_freeze(ap); + else + ata_qc_complete(qc); + + ata_dev_printk(dev, KERN_WARNING, + "qc timeout (cmd 0x%x)\n", command); } spin_unlock_irqrestore(&ap->host_set->lock, flags); } - *tf = qc->tf; + /* do post_internal_cmd */ + if (ap->ops->post_internal_cmd) + ap->ops->post_internal_cmd(qc); + + if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) { + ata_dev_printk(dev, KERN_WARNING, "zero err_mask for failed " + "internal command, assuming AC_ERR_OTHER\n"); + qc->err_mask |= AC_ERR_OTHER; + } + + /* finish up */ + spin_lock_irqsave(&ap->host_set->lock, flags); + + *tf = qc->result_tf; err_mask = qc->err_mask; ata_qc_free(qc); + ap->active_tag = preempted_tag; + ap->sactive = preempted_sactive; + ap->qc_active = preempted_qc_active; /* XXX - Some LLDDs (sata_mv) disable port on command failure. * Until those drivers are fixed, we detect the condition @@ -1033,11 +1104,13 @@ ata_exec_internal(struct ata_port *ap, struct ata_device *dev, * * Kill the following code as soon as those drivers are fixed. */ - if (ap->flags & ATA_FLAG_PORT_DISABLED) { + if (ap->flags & ATA_FLAG_DISABLED) { err_mask |= AC_ERR_SYSTEM; ata_port_probe(ap); } + spin_unlock_irqrestore(&ap->host_set->lock, flags); + return err_mask; } @@ -1076,11 +1149,10 @@ unsigned int ata_pio_need_iordy(const struct ata_device *adev) /** * ata_dev_read_id - Read ID data from the specified device - * @ap: port on which target device resides * @dev: target device * @p_class: pointer to class of the target device (may be changed) * @post_reset: is this read ID post-reset? - * @p_id: read IDENTIFY page (newly allocated) + * @id: buffer to read IDENTIFY data into * * Read ID data from the specified device. ATA_CMD_ID_ATA is * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI @@ -1093,13 +1165,13 @@ unsigned int ata_pio_need_iordy(const struct ata_device *adev) * RETURNS: * 0 on success, -errno otherwise. */ -static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev, - unsigned int *p_class, int post_reset, u16 **p_id) +static int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, + int post_reset, u16 *id) { + struct ata_port *ap = dev->ap; unsigned int class = *p_class; struct ata_taskfile tf; unsigned int err_mask = 0; - u16 *id; const char *reason; int rc; @@ -1107,15 +1179,8 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev, ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ - id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL); - if (id == NULL) { - rc = -ENOMEM; - reason = "out of memory"; - goto err_out; - } - retry: - ata_tf_init(ap, &tf, dev->devno); + ata_tf_init(dev, &tf); switch (class) { case ATA_DEV_ATA: @@ -1132,7 +1197,7 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev, tf.protocol = ATA_PROT_PIO; - err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE, + err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, id, sizeof(id[0]) * ATA_ID_WORDS); if (err_mask) { rc = -EIO; @@ -1159,7 +1224,7 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev, * Some drives were very specific about that exact sequence. */ if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { - err_mask = ata_dev_init_params(ap, dev, id[3], id[6]); + err_mask = ata_dev_init_params(dev, id[3], id[6]); if (err_mask) { rc = -EIO; reason = "INIT_DEV_PARAMS failed"; @@ -1175,25 +1240,44 @@ static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev, } *p_class = class; - *p_id = id; + return 0; err_out: - printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n", - ap->id, dev->devno, reason); - kfree(id); + ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " + "(%s, err_mask=0x%x)\n", reason, err_mask); return rc; } -static inline u8 ata_dev_knobble(const struct ata_port *ap, - struct ata_device *dev) +static inline u8 ata_dev_knobble(struct ata_device *dev) { - return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); + return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); +} + +static void ata_dev_config_ncq(struct ata_device *dev, + char *desc, size_t desc_sz) +{ + struct ata_port *ap = dev->ap; + int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); + + if (!ata_id_has_ncq(dev->id)) { + desc[0] = '\0'; + return; + } + + if (ap->flags & ATA_FLAG_NCQ) { + hdepth = min(ap->host->can_queue, ATA_MAX_QUEUE - 1); + dev->flags |= ATA_DFLAG_NCQ; + } + + if (hdepth >= ddepth) + snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); + else + snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); } /** * ata_dev_configure - Configure the specified ATA/ATAPI device - * @ap: Port on which target device resides * @dev: Target device to configure * @print_info: Enable device info printout * @@ -1206,14 +1290,14 @@ static inline u8 ata_dev_knobble(const struct ata_port *ap, * RETURNS: * 0 on success, -errno otherwise */ -static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, - int print_info) +static int ata_dev_configure(struct ata_device *dev, int print_info) { + struct ata_port *ap = dev->ap; const u16 *id = dev->id; unsigned int xfer_mask; int i, rc; - if (!ata_dev_present(dev)) { + if (!ata_dev_enabled(dev)) { DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n", ap->id, dev->devno); return 0; @@ -1223,13 +1307,13 @@ static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, /* print device capabilities */ if (print_info) - printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x " - "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", - ap->id, dev->devno, id[49], id[82], id[83], - id[84], id[85], id[86], id[87], id[88]); + ata_dev_printk(dev, KERN_DEBUG, "cfg 49:%04x 82:%04x 83:%04x " + "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", + id[49], id[82], id[83], id[84], + id[85], id[86], id[87], id[88]); /* initialize to-be-configured parameters */ - dev->flags = 0; + dev->flags &= ~ATA_DFLAG_CFG_MASK; dev->max_sectors = 0; dev->cdb_len = 0; dev->n_sectors = 0; @@ -1252,6 +1336,7 @@ static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, if (ata_id_has_lba(id)) { const char *lba_desc; + char ncq_desc[20]; lba_desc = "LBA"; dev->flags |= ATA_DFLAG_LBA; @@ -1260,15 +1345,17 @@ static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, lba_desc = "LBA48"; } + /* config NCQ */ + ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); + /* print device info to dmesg */ if (print_info) - printk(KERN_INFO "ata%u: dev %u ATA-%d, " - "max %s, %Lu sectors: %s\n", - ap->id, dev->devno, - ata_id_major_version(id), - ata_mode_string(xfer_mask), - (unsigned long long)dev->n_sectors, - lba_desc); + ata_dev_printk(dev, KERN_INFO, "ATA-%d, " + "max %s, %Lu sectors: %s %s\n", + ata_id_major_version(id), + ata_mode_string(xfer_mask), + (unsigned long long)dev->n_sectors, + lba_desc, ncq_desc); } else { /* CHS */ @@ -1286,13 +1373,18 @@ static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, /* print device info to dmesg */ if (print_info) - printk(KERN_INFO "ata%u: dev %u ATA-%d, " - "max %s, %Lu sectors: CHS %u/%u/%u\n", - ap->id, dev->devno, - ata_id_major_version(id), - ata_mode_string(xfer_mask), - (unsigned long long)dev->n_sectors, - dev->cylinders, dev->heads, dev->sectors); + ata_dev_printk(dev, KERN_INFO, "ATA-%d, " + "max %s, %Lu sectors: CHS %u/%u/%u\n", + ata_id_major_version(id), + ata_mode_string(xfer_mask), + (unsigned long long)dev->n_sectors, + dev->cylinders, dev->heads, dev->sectors); + } + + if (dev->id[59] & 0x100) { + dev->multi_count = dev->id[59] & 0xff; + DPRINTK("ata%u: dev %u multi count %u\n", + ap->id, dev->devno, dev->multi_count); } dev->cdb_len = 16; @@ -1300,18 +1392,27 @@ static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, /* ATAPI-specific feature tests */ else if (dev->class == ATA_DEV_ATAPI) { + char *cdb_intr_string = ""; + rc = atapi_cdb_len(id); if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { - printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id); + ata_dev_printk(dev, KERN_WARNING, + "unsupported CDB len\n"); rc = -EINVAL; goto err_out_nosup; } dev->cdb_len = (unsigned int) rc; + if (ata_id_cdb_intr(dev->id)) { + dev->flags |= ATA_DFLAG_CDB_INTR; + cdb_intr_string = ", CDB intr"; + } + /* print device info to dmesg */ if (print_info) - printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n", - ap->id, dev->devno, ata_mode_string(xfer_mask)); + ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n", + ata_mode_string(xfer_mask), + cdb_intr_string); } ap->host->max_cmd_len = 0; @@ -1321,10 +1422,10 @@ static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, ap->device[i].cdb_len); /* limit bridge transfers to udma5, 200 sectors */ - if (ata_dev_knobble(ap, dev)) { + if (ata_dev_knobble(dev)) { if (print_info) - printk(KERN_INFO "ata%u(%u): applying bridge limits\n", - ap->id, dev->devno); + ata_dev_printk(dev, KERN_INFO, + "applying bridge limits\n"); dev->udma_mask &= ATA_UDMA5; dev->max_sectors = ATA_MAX_SECTORS; } @@ -1352,16 +1453,24 @@ err_out_nosup: * PCI/etc. bus probe sem. * * RETURNS: - * Zero on success, non-zero on error. + * Zero on success, negative errno otherwise. */ static int ata_bus_probe(struct ata_port *ap) { unsigned int classes[ATA_MAX_DEVICES]; - unsigned int i, rc, found = 0; + int tries[ATA_MAX_DEVICES]; + int i, rc, down_xfermask; + struct ata_device *dev; ata_port_probe(ap); + for (i = 0; i < ATA_MAX_DEVICES; i++) + tries[i] = ATA_PROBE_MAX_TRIES; + + retry: + down_xfermask = 0; + /* reset and determine device classes */ for (i = 0; i < ATA_MAX_DEVICES; i++) classes[i] = ATA_DEV_UNKNOWN; @@ -1369,15 +1478,18 @@ static int ata_bus_probe(struct ata_port *ap) if (ap->ops->probe_reset) { rc = ap->ops->probe_reset(ap, classes); if (rc) { - printk("ata%u: reset failed (errno=%d)\n", ap->id, rc); + ata_port_printk(ap, KERN_ERR, + "reset failed (errno=%d)\n", rc); return rc; } } else { ap->ops->phy_reset(ap); - if (!(ap->flags & ATA_FLAG_PORT_DISABLED)) - for (i = 0; i < ATA_MAX_DEVICES; i++) + for (i = 0; i < ATA_MAX_DEVICES; i++) { + if (!(ap->flags & ATA_FLAG_DISABLED)) classes[i] = ap->device[i].class; + ap->device[i].class = ATA_DEV_UNKNOWN; + } ata_port_probe(ap); } @@ -1388,43 +1500,61 @@ static int ata_bus_probe(struct ata_port *ap) /* read IDENTIFY page and configure devices */ for (i = 0; i < ATA_MAX_DEVICES; i++) { - struct ata_device *dev = &ap->device[i]; + dev = &ap->device[i]; - dev->class = classes[i]; + if (tries[i]) + dev->class = classes[i]; - if (!ata_dev_present(dev)) + if (!ata_dev_enabled(dev)) continue; - WARN_ON(dev->id != NULL); - if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) { - dev->class = ATA_DEV_NONE; - continue; - } + rc = ata_dev_read_id(dev, &dev->class, 1, dev->id); + if (rc) + goto fail; - if (ata_dev_configure(ap, dev, 1)) { - ata_dev_disable(ap, dev); - continue; - } + rc = ata_dev_configure(dev, 1); + if (rc) + goto fail; + } - found = 1; + /* configure transfer mode */ + rc = ata_set_mode(ap, &dev); + if (rc) { + down_xfermask = 1; + goto fail; } - if (!found) - goto err_out_disable; + for (i = 0; i < ATA_MAX_DEVICES; i++) + if (ata_dev_enabled(&ap->device[i])) + return 0; - if (ap->ops->set_mode) - ap->ops->set_mode(ap); - else - ata_set_mode(ap); + /* no device present, disable port */ + ata_port_disable(ap); + ap->ops->port_disable(ap); + return -ENODEV; - if (ap->flags & ATA_FLAG_PORT_DISABLED) - goto err_out_disable; + fail: + switch (rc) { + case -EINVAL: + case -ENODEV: + tries[dev->devno] = 0; + break; + case -EIO: + sata_down_spd_limit(ap); + /* fall through */ + default: + tries[dev->devno]--; + if (down_xfermask && + ata_down_xfermask_limit(dev, tries[dev->devno] == 1)) + tries[dev->devno] = 0; + } - return 0; + if (!tries[dev->devno]) { + ata_down_xfermask_limit(dev, 1); + ata_dev_disable(dev); + } -err_out_disable: - ap->ops->port_disable(ap); - return -1; + goto retry; } /** @@ -1440,7 +1570,7 @@ err_out_disable: void ata_port_probe(struct ata_port *ap) { - ap->flags &= ~ATA_FLAG_PORT_DISABLED; + ap->flags &= ~ATA_FLAG_DISABLED; } /** @@ -1454,27 +1584,21 @@ void ata_port_probe(struct ata_port *ap) */ static void sata_print_link_status(struct ata_port *ap) { - u32 sstatus, tmp; - const char *speed; + u32 sstatus, scontrol, tmp; - if (!ap->ops->scr_read) + if (sata_scr_read(ap, SCR_STATUS, &sstatus)) return; + sata_scr_read(ap, SCR_CONTROL, &scontrol); - sstatus = scr_read(ap, SCR_STATUS); - - if (sata_dev_present(ap)) { + if (ata_port_online(ap)) { tmp = (sstatus >> 4) & 0xf; - if (tmp & (1 << 0)) - speed = "1.5"; - else if (tmp & (1 << 1)) - speed = "3.0"; - else - speed = "<unknown>"; - printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n", - ap->id, speed, sstatus); + ata_port_printk(ap, KERN_INFO, + "SATA link up %s (SStatus %X SControl %X)\n", + sata_spd_string(tmp), sstatus, scontrol); } else { - printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n", - ap->id, sstatus); + ata_port_printk(ap, KERN_INFO, + "SATA link down (SStatus %X SControl %X)\n", + sstatus, scontrol); } } @@ -1497,17 +1621,18 @@ void __sata_phy_reset(struct ata_port *ap) if (ap->flags & ATA_FLAG_SATA_RESET) { /* issue phy wake/reset */ - scr_write_flush(ap, SCR_CONTROL, 0x301); + sata_scr_write_flush(ap, SCR_CONTROL, 0x301); /* Couldn't find anything in SATA I/II specs, but * AHCI-1.1 10.4.2 says at least 1 ms. */ mdelay(1); } - scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */ + /* phy wake/clear reset */ + sata_scr_write_flush(ap, SCR_CONTROL, 0x300); /* wait for phy to become ready, if necessary */ do { msleep(200); - sstatus = scr_read(ap, SCR_STATUS); + sata_scr_read(ap, SCR_STATUS, &sstatus); if ((sstatus & 0xf) != 1) break; } while (time_before(jiffies, timeout)); @@ -1516,12 +1641,12 @@ void __sata_phy_reset(struct ata_port *ap) sata_print_link_status(ap); /* TODO: phy layer with polling, timeouts, etc. */ - if (sata_dev_present(ap)) + if (!ata_port_offline(ap)) ata_port_probe(ap); else ata_port_disable(ap); - if (ap->flags & ATA_FLAG_PORT_DISABLED) + if (ap->flags & ATA_FLAG_DISABLED) return; if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { @@ -1546,24 +1671,24 @@ void __sata_phy_reset(struct ata_port *ap) void sata_phy_reset(struct ata_port *ap) { __sata_phy_reset(ap); - if (ap->flags & ATA_FLAG_PORT_DISABLED) + if (ap->flags & ATA_FLAG_DISABLED) return; ata_bus_reset(ap); } /** * ata_dev_pair - return other device on cable - * @ap: port * @adev: device * * Obtain the other device on the same cable, or if none is * present NULL is returned */ -struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev) +struct ata_device *ata_dev_pair(struct ata_device *adev) { + struct ata_port *ap = adev->ap; struct ata_device *pair = &ap->device[1 - adev->devno]; - if (!ata_dev_present(pair)) + if (!ata_dev_enabled(pair)) return NULL; return pair; } @@ -1585,7 +1710,122 @@ void ata_port_disable(struct ata_port *ap) { ap->device[0].class = ATA_DEV_NONE; ap->device[1].class = ATA_DEV_NONE; - ap->flags |= ATA_FLAG_PORT_DISABLED; + ap->flags |= ATA_FLAG_DISABLED; +} + +/** + * sata_down_spd_limit - adjust SATA spd limit downward + * @ap: Port to adjust SATA spd limit for + * + * Adjust SATA spd limit of @ap downward. Note that this + * function only adjusts the limit. The change must be applied + * using sata_set_spd(). + * + * LOCKING: + * Inherited from caller. + * + * RETURNS: + * 0 on success, negative errno on failure + */ +int sata_down_spd_limit(struct ata_port *ap) +{ + u32 sstatus, spd, mask; + int rc, highbit; + + rc = sata_scr_read(ap, SCR_STATUS, &sstatus); + if (rc) + return rc; + + mask = ap->sata_spd_limit; + if (mask <= 1) + return -EINVAL; + highbit = fls(mask) - 1; + mask &= ~(1 << highbit); + + spd = (sstatus >> 4) & 0xf; + if (spd <= 1) + return -EINVAL; + spd--; + mask &= (1 << spd) - 1; + if (!mask) + return -EINVAL; + + ap->sata_spd_limit = mask; + + ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", + sata_spd_string(fls(mask))); + + return 0; +} + +static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) +{ + u32 spd, limit; + + if (ap->sata_spd_limit == UINT_MAX) + limit = 0; + else + limit = fls(ap->sata_spd_limit); + + spd = (*scontrol >> 4) & 0xf; + *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); + + return spd != limit; +} + +/** + * sata_set_spd_needed - is SATA spd configuration needed + * @ap: Port in question + * + * Test whether the spd limit in SControl matches + * @ap->sata_spd_limit. This function is used to determine + * whether hardreset is necessary to apply SATA spd + * configuration. + * + * LOCKING: + * Inherited from caller. + * + * RETURNS: + * 1 if SATA spd configuration is needed, 0 otherwise. + */ +int sata_set_spd_needed(struct ata_port *ap) +{ + u32 scontrol; + + if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) + return 0; + + return __sata_set_spd_needed(ap, &scontrol); +} + +/** + * sata_set_spd - set SATA spd according to spd limit + * @ap: Port to set SATA spd for + * + * Set SATA spd of @ap according to sata_spd_limit. + * + * LOCKING: + * Inherited from caller. + * + * RETURNS: + * 0 if spd doesn't need to be changed, 1 if spd has been + * changed. Negative errno if SCR registers are inaccessible. + */ +int sata_set_spd(struct ata_port *ap) +{ + u32 scontrol; + int rc; + + if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) + return rc; + + if (!__sata_set_spd_needed(ap, &scontrol)) + return 0; + + if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) + return rc; + + return 1; } /* @@ -1736,151 +1976,196 @@ int ata_timing_compute(struct ata_device *adev, unsigned short speed, return 0; } -static int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev) +/** + * ata_down_xfermask_limit - adjust dev xfer masks downward + * @dev: Device to adjust xfer masks + * @force_pio0: Force PIO0 + * + * Adjust xfer masks of @dev downward. Note that this function + * does not apply the change. Invoking ata_set_mode() afterwards + * will apply the limit. + * + * LOCKING: + * Inherited from caller. + * + * RETURNS: + * 0 on success, negative errno on failure + */ +int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0) +{ + unsigned long xfer_mask; + int highbit; + + xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask, + dev->udma_mask); + + if (!xfer_mask) + goto fail; + /* don't gear down to MWDMA from UDMA, go directly to PIO */ + if (xfer_mask & ATA_MASK_UDMA) + xfer_mask &= ~ATA_MASK_MWDMA; + + highbit = fls(xfer_mask) - 1; + xfer_mask &= ~(1 << highbit); + if (force_pio0) + xfer_mask &= 1 << ATA_SHIFT_PIO; + if (!xfer_mask) + goto fail; + + ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, + &dev->udma_mask); + + ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n", + ata_mode_string(xfer_mask)); + + return 0; + + fail: + return -EINVAL; +} + +static int ata_dev_set_mode(struct ata_device *dev) { unsigned int err_mask; int rc; + dev->flags &= ~ATA_DFLAG_PIO; if (dev->xfer_shift == ATA_SHIFT_PIO) dev->flags |= ATA_DFLAG_PIO; - err_mask = ata_dev_set_xfermode(ap, dev); + err_mask = ata_dev_set_xfermode(dev); if (err_mask) { - printk(KERN_ERR - "ata%u: failed to set xfermode (err_mask=0x%x)\n", - ap->id, err_mask); + ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " + "(err_mask=0x%x)\n", err_mask); return -EIO; } - rc = ata_dev_revalidate(ap, dev, 0); - if (rc) { - printk(KERN_ERR - "ata%u: failed to revalidate after set xfermode\n", - ap->id); + rc = ata_dev_revalidate(dev, 0); + if (rc) return rc; - } DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", dev->xfer_shift, (int)dev->xfer_mode); - printk(KERN_INFO "ata%u: dev %u configured for %s\n", - ap->id, dev->devno, - ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); + ata_dev_printk(dev, KERN_INFO, "configured for %s\n", + ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); return 0; } -static int ata_host_set_pio(struct ata_port *ap) -{ - int i; - - for (i = 0; i < ATA_MAX_DEVICES; i++) { - struct ata_device *dev = &ap->device[i]; - - if (!ata_dev_present(dev)) - continue; - - if (!dev->pio_mode) { - printk(KERN_WARNING "ata%u: no PIO support for device %d.\n", ap->id, i); - return -1; - } - - dev->xfer_mode = dev->pio_mode; - dev->xfer_shift = ATA_SHIFT_PIO; - if (ap->ops->set_piomode) - ap->ops->set_piomode(ap, dev); - } - - return 0; -} - -static void ata_host_set_dma(struct ata_port *ap) -{ - int i; - - for (i = 0; i < ATA_MAX_DEVICES; i++) { - struct ata_device *dev = &ap->device[i]; - - if (!ata_dev_present(dev) || !dev->dma_mode) - continue; - - dev->xfer_mode = dev->dma_mode; - dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); - if (ap->ops->set_dmamode) - ap->ops->set_dmamode(ap, dev); - } -} - /** * ata_set_mode - Program timings and issue SET FEATURES - XFER * @ap: port on which timings will be programmed + * @r_failed_dev: out paramter for failed device * - * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). + * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If + * ata_set_mode() fails, pointer to the failing device is + * returned in @r_failed_dev. * * LOCKING: * PCI/etc. bus probe sem. + * + * RETURNS: + * 0 on success, negative errno otherwise */ -static void ata_set_mode(struct ata_port *ap) +int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) { - int i, rc, used_dma = 0; + struct ata_device *dev; + int i, rc = 0, used_dma = 0, found = 0; + + /* has private set_mode? */ + if (ap->ops->set_mode) { + /* FIXME: make ->set_mode handle no device case and + * return error code and failing device on failure. + */ + for (i = 0; i < ATA_MAX_DEVICES; i++) { + if (ata_dev_enabled(&ap->device[i])) { + ap->ops->set_mode(ap); + break; + } + } + return 0; + } /* step 1: calculate xfer_mask */ for (i = 0; i < ATA_MAX_DEVICES; i++) { - struct ata_device *dev = &ap->device[i]; unsigned int pio_mask, dma_mask; - if (!ata_dev_present(dev)) - continue; + dev = &ap->device[i]; - ata_dev_xfermask(ap, dev); + if (!ata_dev_enabled(dev)) + continue; - /* TODO: let LLDD filter dev->*_mask here */ + ata_dev_xfermask(dev); pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); dev->pio_mode = ata_xfer_mask2mode(pio_mask); dev->dma_mode = ata_xfer_mask2mode(dma_mask); + found = 1; if (dev->dma_mode) used_dma = 1; } + if (!found) + goto out; /* step 2: always set host PIO timings */ - rc = ata_host_set_pio(ap); - if (rc) - goto err_out; + for (i = 0; i < ATA_MAX_DEVICES; i++) { + dev = &ap->device[i]; + if (!ata_dev_enabled(dev)) + continue; + + if (!dev->pio_mode) { + ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); + rc = -EINVAL; + goto out; + } + + dev->xfer_mode = dev->pio_mode; + dev->xfer_shift = ATA_SHIFT_PIO; + if (ap->ops->set_piomode) + ap->ops->set_piomode(ap, dev); + } /* step 3: set host DMA timings */ - ata_host_set_dma(ap); + for (i = 0; i < ATA_MAX_DEVICES; i++) { + dev = &ap->device[i]; + + if (!ata_dev_enabled(dev) || !dev->dma_mode) + continue; + + dev->xfer_mode = dev->dma_mode; + dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); + if (ap->ops->set_dmamode) + ap->ops->set_dmamode(ap, dev); + } /* step 4: update devices' xfer mode */ for (i = 0; i < ATA_MAX_DEVICES; i++) { - struct ata_device *dev = &ap->device[i]; + dev = &ap->device[i]; - if (!ata_dev_present(dev)) + if (!ata_dev_enabled(dev)) continue; - if (ata_dev_set_mode(ap, dev)) - goto err_out; + rc = ata_dev_set_mode(dev); + if (rc) + goto out; } - /* - * Record simplex status. If we selected DMA then the other - * host channels are not permitted to do so. + /* Record simplex status. If we selected DMA then the other + * host channels are not permitted to do so. */ - if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX)) ap->host_set->simplex_claimed = 1; - /* - * Chip specific finalisation - */ + /* step5: chip specific finalisation */ if (ap->ops->post_set_mode) ap->ops->post_set_mode(ap); - return; - -err_out: - ata_port_disable(ap); + out: + if (rc) + *r_failed_dev = dev; + return rc; } /** @@ -1930,8 +2215,8 @@ unsigned int ata_busy_sleep (struct ata_port *ap, } if (status & ATA_BUSY) - printk(KERN_WARNING "ata%u is slow to respond, " - "please be patient\n", ap->id); + ata_port_printk(ap, KERN_WARNING, + "port is slow to respond, please be patient\n"); timeout = timer_start + tmout; while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { @@ -1940,8 +2225,8 @@ unsigned int ata_busy_sleep (struct ata_port *ap, } if (status & ATA_BUSY) { - printk(KERN_ERR "ata%u failed to respond (%lu secs)\n", - ap->id, tmout / HZ); + ata_port_printk(ap, KERN_ERR, "port failed to respond " + "(%lu secs)\n", tmout / HZ); return 1; } @@ -2033,8 +2318,10 @@ static unsigned int ata_bus_softreset(struct ata_port *ap, * the bus shows 0xFF because the odd clown forgets the D7 * pulldown resistor. */ - if (ata_check_status(ap) == 0xFF) + if (ata_check_status(ap) == 0xFF) { + ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n"); return AC_ERR_OTHER; + } ata_bus_post_reset(ap, devmask); @@ -2058,7 +2345,7 @@ static unsigned int ata_bus_softreset(struct ata_port *ap, * Obtains host_set lock. * * SIDE EFFECTS: - * Sets ATA_FLAG_PORT_DISABLED if bus reset fails. + * Sets ATA_FLAG_DISABLED if bus reset fails. */ void ata_bus_reset(struct ata_port *ap) @@ -2126,7 +2413,7 @@ void ata_bus_reset(struct ata_port *ap) return; err_out: - printk(KERN_ERR "ata%u: disabling port\n", ap->id); + ata_port_printk(ap, KERN_ERR, "disabling port\n"); ap->ops->port_disable(ap); DPRINTK("EXIT\n"); @@ -2135,19 +2422,27 @@ err_out: static int sata_phy_resume(struct ata_port *ap) { unsigned long timeout = jiffies + (HZ * 5); - u32 sstatus; + u32 scontrol, sstatus; + int rc; - scr_write_flush(ap, SCR_CONTROL, 0x300); + if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) + return rc; + + scontrol = (scontrol & 0x0f0) | 0x300; + + if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) + return rc; /* Wait for phy to become ready, if necessary. */ do { msleep(200); - sstatus = scr_read(ap, SCR_STATUS); + if ((rc = sata_scr_read(ap, SCR_STATUS, &sstatus))) + return rc; if ((sstatus & 0xf) != 1) return 0; } while (time_before(jiffies, timeout)); - return -1; + return -EBUSY; } /** @@ -2165,17 +2460,25 @@ static int sata_phy_resume(struct ata_port *ap) */ void ata_std_probeinit(struct ata_port *ap) { - if ((ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read) { - sata_phy_resume(ap); - if (sata_dev_present(ap)) - ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); + u32 scontrol; + + /* resume link */ + sata_phy_resume(ap); + + /* init sata_spd_limit to the current value */ + if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { + int spd = (scontrol >> 4) & 0xf; + ap->sata_spd_limit &= (1 << spd) - 1; } + + /* wait for device */ + if (ata_port_online(ap)) + ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); } /** * ata_std_softreset - reset host port via ATA SRST * @ap: port to reset - * @verbose: fail verbosely * @classes: resulting classes of attached devices * * Reset host port using ATA SRST. This function is to be used @@ -2187,7 +2490,7 @@ void ata_std_probeinit(struct ata_port *ap) * RETURNS: * 0 on success, -errno otherwise. */ -int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) +int ata_std_softreset(struct ata_port *ap, unsigned int *classes) { unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; unsigned int devmask = 0, err_mask; @@ -2195,7 +2498,7 @@ int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) DPRINTK("ENTER\n"); - if (ap->ops->scr_read && !sata_dev_present(ap)) { + if (ata_port_offline(ap)) { classes[0] = ATA_DEV_NONE; goto out; } @@ -2213,11 +2516,7 @@ int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) DPRINTK("about to softreset, devmask=%x\n", devmask); err_mask = ata_bus_softreset(ap, devmask); if (err_mask) { - if (verbose) - printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n", - ap->id, err_mask); - else - DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n", + ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", err_mask); return -EIO; } @@ -2235,7 +2534,6 @@ int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) /** * sata_std_hardreset - reset host port via SATA phy reset * @ap: port to reset - * @verbose: fail verbosely * @class: resulting class of attached device * * SATA phy-reset host port using DET bits of SControl register. @@ -2248,35 +2546,57 @@ int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) * RETURNS: * 0 on success, -errno otherwise. */ -int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class) +int sata_std_hardreset(struct ata_port *ap, unsigned int *class) { + u32 scontrol; + int rc; + DPRINTK("ENTER\n"); - /* Issue phy wake/reset */ - scr_write_flush(ap, SCR_CONTROL, 0x301); + if (sata_set_spd_needed(ap)) { + /* SATA spec says nothing about how to reconfigure + * spd. To be on the safe side, turn off phy during + * reconfiguration. This works for at least ICH7 AHCI + * and Sil3124. + */ + if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) + return rc; - /* - * Couldn't find anything in SATA I/II specs, but AHCI-1.1 + scontrol = (scontrol & 0x0f0) | 0x302; + + if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) + return rc; + + sata_set_spd(ap); + } + + /* issue phy wake/reset */ + if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) + return rc; + + scontrol = (scontrol & 0x0f0) | 0x301; + + if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) + return rc; + + /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 * 10.4.2 says at least 1 ms. */ msleep(1); - /* Bring phy back */ + /* bring phy back */ sata_phy_resume(ap); /* TODO: phy layer with polling, timeouts, etc. */ - if (!sata_dev_present(ap)) { + if (ata_port_offline(ap)) { *class = ATA_DEV_NONE; DPRINTK("EXIT, link offline\n"); return 0; } if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { - if (verbose) - printk(KERN_ERR "ata%u: COMRESET failed " - "(device not ready)\n", ap->id); - else - DPRINTK("EXIT, device not ready\n"); + ata_port_printk(ap, KERN_ERR, + "COMRESET failed (device not ready)\n"); return -EIO; } @@ -2305,19 +2625,23 @@ int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class) */ void ata_std_postreset(struct ata_port *ap, unsigned int *classes) { - DPRINTK("ENTER\n"); + u32 serror; - /* set cable type if it isn't already set */ - if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA) - ap->cbl = ATA_CBL_SATA; + DPRINTK("ENTER\n"); /* print link status */ - if (ap->cbl == ATA_CBL_SATA) - sata_print_link_status(ap); + sata_print_link_status(ap); + + /* clear SError */ + if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) + sata_scr_write(ap, SCR_ERROR, serror); /* re-enable interrupts */ - if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ - ata_irq_on(ap); + if (!ap->ops->error_handler) { + /* FIXME: hack. create a hook instead */ + if (ap->ioaddr.ctl_addr) + ata_irq_on(ap); + } /* is double-select really necessary? */ if (classes[0] != ATA_DEV_NONE) @@ -2360,7 +2684,7 @@ int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes) ata_reset_fn_t hardreset; hardreset = NULL; - if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) + if (sata_scr_valid(ap)) hardreset = sata_std_hardreset; return ata_drive_probe_reset(ap, ata_std_probeinit, @@ -2368,16 +2692,15 @@ int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes) ata_std_postreset, classes); } -static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset, - ata_postreset_fn_t postreset, - unsigned int *classes) +int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset, + unsigned int *classes) { int i, rc; for (i = 0; i < ATA_MAX_DEVICES; i++) classes[i] = ATA_DEV_UNKNOWN; - rc = reset(ap, 0, classes); + rc = reset(ap, classes); if (rc) return rc; @@ -2394,10 +2717,7 @@ static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset, if (classes[i] == ATA_DEV_UNKNOWN) classes[i] = ATA_DEV_NONE; - if (postreset) - postreset(ap, classes); - - return classes[0] != ATA_DEV_UNKNOWN ? 0 : -ENODEV; + return 0; } /** @@ -2421,8 +2741,6 @@ static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset, * - If classification is supported, fill classes[] with * recognized class codes. * - If classification is not supported, leave classes[] alone. - * - If verbose is non-zero, print error message on failure; - * otherwise, shut up. * * LOCKING: * Kernel thread context (may sleep) @@ -2438,31 +2756,63 @@ int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit, { int rc = -EINVAL; + ata_eh_freeze_port(ap); + if (probeinit) probeinit(ap); - if (softreset) { - rc = do_probe_reset(ap, softreset, postreset, classes); - if (rc == 0) - return 0; + if (softreset && !sata_set_spd_needed(ap)) { + rc = ata_do_reset(ap, softreset, classes); + if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN) + goto done; + ata_port_printk(ap, KERN_INFO, "softreset failed, " + "will try hardreset in 5 secs\n"); + ssleep(5); } if (!hardreset) - return rc; + goto done; - rc = do_probe_reset(ap, hardreset, postreset, classes); - if (rc == 0 || rc != -ENODEV) - return rc; + while (1) { + rc = ata_do_reset(ap, hardreset, classes); + if (rc == 0) { + if (classes[0] != ATA_DEV_UNKNOWN) + goto done; + break; + } + + if (sata_down_spd_limit(ap)) + goto done; + + ata_port_printk(ap, KERN_INFO, "hardreset failed, " + "will retry in 5 secs\n"); + ssleep(5); + } + + if (softreset) { + ata_port_printk(ap, KERN_INFO, + "hardreset succeeded without classification, " + "will retry softreset in 5 secs\n"); + ssleep(5); - if (softreset) - rc = do_probe_reset(ap, softreset, postreset, classes); + rc = ata_do_reset(ap, softreset, classes); + } + + done: + if (rc == 0) { + if (postreset) + postreset(ap, classes); + ata_eh_thaw_port(ap); + + if (classes[0] == ATA_DEV_UNKNOWN) + rc = -ENODEV; + } return rc; } /** * ata_dev_same_device - Determine whether new ID matches configured device - * @ap: port on which the device to compare against resides * @dev: device to compare against * @new_class: class of the new device * @new_id: IDENTIFY page of the new device @@ -2477,17 +2827,16 @@ int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit, * RETURNS: * 1 if @dev matches @new_class and @new_id, 0 otherwise. */ -static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev, - unsigned int new_class, const u16 *new_id) +static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, + const u16 *new_id) { const u16 *old_id = dev->id; unsigned char model[2][41], serial[2][21]; u64 new_n_sectors; if (dev->class != new_class) { - printk(KERN_INFO - "ata%u: dev %u class mismatch %d != %d\n", - ap->id, dev->devno, dev->class, new_class); + ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", + dev->class, new_class); return 0; } @@ -2498,24 +2847,22 @@ static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev, new_n_sectors = ata_id_n_sectors(new_id); if (strcmp(model[0], model[1])) { - printk(KERN_INFO - "ata%u: dev %u model number mismatch '%s' != '%s'\n", - ap->id, dev->devno, model[0], model[1]); + ata_dev_printk(dev, KERN_INFO, "model number mismatch " + "'%s' != '%s'\n", model[0], model[1]); return 0; } if (strcmp(serial[0], serial[1])) { - printk(KERN_INFO - "ata%u: dev %u serial number mismatch '%s' != '%s'\n", - ap->id, dev->devno, serial[0], serial[1]); + ata_dev_printk(dev, KERN_INFO, "serial number mismatch " + "'%s' != '%s'\n", serial[0], serial[1]); return 0; } if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { - printk(KERN_INFO - "ata%u: dev %u n_sectors mismatch %llu != %llu\n", - ap->id, dev->devno, (unsigned long long)dev->n_sectors, - (unsigned long long)new_n_sectors); + ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " + "%llu != %llu\n", + (unsigned long long)dev->n_sectors, + (unsigned long long)new_n_sectors); return 0; } @@ -2524,7 +2871,6 @@ static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev, /** * ata_dev_revalidate - Revalidate ATA device - * @ap: port on which the device to revalidate resides * @dev: device to revalidate * @post_reset: is this revalidation after reset? * @@ -2537,40 +2883,37 @@ static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev, * RETURNS: * 0 on success, negative errno otherwise */ -int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev, - int post_reset) +int ata_dev_revalidate(struct ata_device *dev, int post_reset) { - unsigned int class; - u16 *id; + unsigned int class = dev->class; + u16 *id = (void *)dev->ap->sector_buf; int rc; - if (!ata_dev_present(dev)) - return -ENODEV; - - class = dev->class; - id = NULL; + if (!ata_dev_enabled(dev)) { + rc = -ENODEV; + goto fail; + } - /* allocate & read ID data */ - rc = ata_dev_read_id(ap, dev, &class, post_reset, &id); + /* read ID data */ + rc = ata_dev_read_id(dev, &class, post_reset, id); if (rc) goto fail; /* is the device still there? */ - if (!ata_dev_same_device(ap, dev, class, id)) { + if (!ata_dev_same_device(dev, class, id)) { rc = -ENODEV; goto fail; } - kfree(dev->id); - dev->id = id; + memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); /* configure device according to the new ID */ - return ata_dev_configure(ap, dev, 0); + rc = ata_dev_configure(dev, 0); + if (rc == 0) + return 0; fail: - printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n", - ap->id, dev->devno, rc); - kfree(id); + ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); return rc; } @@ -2646,7 +2989,6 @@ static int ata_dma_blacklisted(const struct ata_device *dev) /** * ata_dev_xfermask - Compute supported xfermask of the given device - * @ap: Port on which the device to compute xfermask for resides * @dev: Device to compute xfermask for * * Compute supported xfermask of @dev and store it in @@ -2661,49 +3003,61 @@ static int ata_dma_blacklisted(const struct ata_device *dev) * LOCKING: * None. */ -static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev) +static void ata_dev_xfermask(struct ata_device *dev) { + struct ata_port *ap = dev->ap; struct ata_host_set *hs = ap->host_set; unsigned long xfer_mask; int i; - xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, - ap->udma_mask); + xfer_mask = ata_pack_xfermask(ap->pio_mask, + ap->mwdma_mask, ap->udma_mask); + + /* Apply cable rule here. Don't apply it early because when + * we handle hot plug the cable type can itself change. + */ + if (ap->cbl == ATA_CBL_PATA40) + xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); /* FIXME: Use port-wide xfermask for now */ for (i = 0; i < ATA_MAX_DEVICES; i++) { struct ata_device *d = &ap->device[i]; - if (!ata_dev_present(d)) + + if (ata_dev_absent(d)) + continue; + + if (ata_dev_disabled(d)) { + /* to avoid violating device selection timing */ + xfer_mask &= ata_pack_xfermask(d->pio_mask, + UINT_MAX, UINT_MAX); continue; - xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask, - d->udma_mask); + } + + xfer_mask &= ata_pack_xfermask(d->pio_mask, + d->mwdma_mask, d->udma_mask); xfer_mask &= ata_id_xfermask(d->id); if (ata_dma_blacklisted(d)) xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); - /* Apply cable rule here. Don't apply it early because when - we handle hot plug the cable type can itself change */ - if (ap->cbl == ATA_CBL_PATA40) - xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); } if (ata_dma_blacklisted(dev)) - printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, " - "disabling DMA\n", ap->id, dev->devno); + ata_dev_printk(dev, KERN_WARNING, + "device is on DMA blacklist, disabling DMA\n"); if (hs->flags & ATA_HOST_SIMPLEX) { if (hs->simplex_claimed) xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); } + if (ap->ops->mode_filter) xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask); - ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, - &dev->udma_mask); + ata_unpack_xfermask(xfer_mask, &dev->pio_mask, + &dev->mwdma_mask, &dev->udma_mask); } /** * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command - * @ap: Port associated with device @dev * @dev: Device to which command will be sent * * Issue SET FEATURES - XFER MODE command to device @dev @@ -2716,8 +3070,7 @@ static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev) * 0 on success, AC_ERR_* mask otherwise. */ -static unsigned int ata_dev_set_xfermode(struct ata_port *ap, - struct ata_device *dev) +static unsigned int ata_dev_set_xfermode(struct ata_device *dev) { struct ata_taskfile tf; unsigned int err_mask; @@ -2725,14 +3078,14 @@ static unsigned int ata_dev_set_xfermode(struct ata_port *ap, /* set up set-features taskfile */ DPRINTK("set features - xfer mode\n"); - ata_tf_init(ap, &tf, dev->devno); + ata_tf_init(dev, &tf); tf.command = ATA_CMD_SET_FEATURES; tf.feature = SETFEATURES_XFER; tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; tf.protocol = ATA_PROT_NODATA; tf.nsect = dev->xfer_mode; - err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); + err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); DPRINTK("EXIT, err_mask=%x\n", err_mask); return err_mask; @@ -2740,7 +3093,6 @@ static unsigned int ata_dev_set_xfermode(struct ata_port *ap, /** * ata_dev_init_params - Issue INIT DEV PARAMS command - * @ap: Port associated with device @dev * @dev: Device to which command will be sent * @heads: Number of heads (taskfile parameter) * @sectors: Number of sectors (taskfile parameter) @@ -2751,11 +3103,8 @@ static unsigned int ata_dev_set_xfermode(struct ata_port *ap, * RETURNS: * 0 on success, AC_ERR_* mask otherwise. */ - -static unsigned int ata_dev_init_params(struct ata_port *ap, - struct ata_device *dev, - u16 heads, - u16 sectors) +static unsigned int ata_dev_init_params(struct ata_device *dev, + u16 heads, u16 sectors) { struct ata_taskfile tf; unsigned int err_mask; @@ -2767,14 +3116,14 @@ static unsigned int ata_dev_init_params(struct ata_port *ap, /* set up init dev params taskfile */ DPRINTK("init dev params \n"); - ata_tf_init(ap, &tf, dev->devno); + ata_tf_init(dev, &tf); tf.command = ATA_CMD_INIT_DEV_PARAMS; tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; tf.protocol = ATA_PROT_NODATA; tf.nsect = sectors; tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ - err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); + err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); DPRINTK("EXIT, err_mask=%x\n", err_mask); return err_mask; @@ -2912,6 +3261,15 @@ int ata_check_atapi_dma(struct ata_queued_cmd *qc) if (ap->ops->check_atapi_dma) rc = ap->ops->check_atapi_dma(qc); + /* We don't support polling DMA. + * Use PIO if the LLDD handles only interrupts in + * the HSM_ST_LAST state and the ATAPI device + * generates CDB interrupts. + */ + if ((ap->flags & ATA_FLAG_PIO_POLLING) && + (qc->dev->flags & ATA_DFLAG_CDB_INTR)) + rc = 1; + return rc; } /** @@ -3140,134 +3498,6 @@ skip_map: } /** - * ata_poll_qc_complete - turn irq back on and finish qc - * @qc: Command to complete - * @err_mask: ATA status register content - * - * LOCKING: - * None. (grabs host lock) - */ - -void ata_poll_qc_complete(struct ata_queued_cmd *qc) -{ - struct ata_port *ap = qc->ap; - unsigned long flags; - - spin_lock_irqsave(&ap->host_set->lock, flags); - ap->flags &= ~ATA_FLAG_NOINTR; - ata_irq_on(ap); - ata_qc_complete(qc); - spin_unlock_irqrestore(&ap->host_set->lock, flags); -} - -/** - * ata_pio_poll - poll using PIO, depending on current state - * @ap: the target ata_port - * - * LOCKING: - * None. (executing in kernel thread context) - * - * RETURNS: - * timeout value to use - */ - -static unsigned long ata_pio_poll(struct ata_port *ap) -{ - struct ata_queued_cmd *qc; - u8 status; - unsigned int poll_state = HSM_ST_UNKNOWN; - unsigned int reg_state = HSM_ST_UNKNOWN; - - qc = ata_qc_from_tag(ap, ap->active_tag); - WARN_ON(qc == NULL); - - switch (ap->hsm_task_state) { - case HSM_ST: - case HSM_ST_POLL: - poll_state = HSM_ST_POLL; - reg_state = HSM_ST; - break; - case HSM_ST_LAST: - case HSM_ST_LAST_POLL: - poll_state = HSM_ST_LAST_POLL; - reg_state = HSM_ST_LAST; - break; - default: - BUG(); - break; - } - - status = ata_chk_status(ap); - if (status & ATA_BUSY) { - if (time_after(jiffies, ap->pio_task_timeout)) { - qc->err_mask |= AC_ERR_TIMEOUT; - ap->hsm_task_state = HSM_ST_TMOUT; - return 0; - } - ap->hsm_task_state = poll_state; - return ATA_SHORT_PAUSE; - } - - ap->hsm_task_state = reg_state; - return 0; -} - -/** - * ata_pio_complete - check if drive is busy or idle - * @ap: the target ata_port - * - * LOCKING: - * None. (executing in kernel thread context) - * - * RETURNS: - * Non-zero if qc completed, zero otherwise. - */ - -static int ata_pio_complete (struct ata_port *ap) -{ - struct ata_queued_cmd *qc; - u8 drv_stat; - - /* - * This is purely heuristic. This is a fast path. Sometimes when - * we enter, BSY will be cleared in a chk-status or two. If not, - * the drive is probably seeking or something. Snooze for a couple - * msecs, then chk-status again. If still busy, fall back to - * HSM_ST_POLL state. - */ - drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); - if (drv_stat & ATA_BUSY) { - msleep(2); - drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); - if (drv_stat & ATA_BUSY) { - ap->hsm_task_state = HSM_ST_LAST_POLL; - ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; - return 0; - } - } - - qc = ata_qc_from_tag(ap, ap->active_tag); - WARN_ON(qc == NULL); - - drv_stat = ata_wait_idle(ap); - if (!ata_ok(drv_stat)) { - qc->err_mask |= __ac_err_mask(drv_stat); - ap->hsm_task_state = HSM_ST_ERR; - return 0; - } - - ap->hsm_task_state = HSM_ST_IDLE; - - WARN_ON(qc->err_mask); - ata_poll_qc_complete(qc); - - /* another command may start at this point */ - - return 1; -} - - -/** * swap_buf_le16 - swap halves of 16-bit words in place * @buf: Buffer to swap * @buf_words: Number of 16-bit words in buffer. @@ -3435,7 +3665,23 @@ static void ata_pio_sector(struct ata_queued_cmd *qc) page = nth_page(page, (offset >> PAGE_SHIFT)); offset %= PAGE_SIZE; - buf = kmap(page) + offset; + DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); + + if (PageHighMem(page)) { + unsigned long flags; + + local_irq_save(flags); + buf = kmap_atomic(page, KM_IRQ0); + + /* do the actual data transfer */ + ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write); + + kunmap_atomic(buf, KM_IRQ0); + local_irq_restore(flags); + } else { + buf = page_address(page); + ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write); + } qc->cursect++; qc->cursg_ofs++; @@ -3444,14 +3690,68 @@ static void ata_pio_sector(struct ata_queued_cmd *qc) qc->cursg++; qc->cursg_ofs = 0; } +} - DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); +/** + * ata_pio_sectors - Transfer one or many 512-byte sectors. + * @qc: Command on going + * + * Transfer one or many ATA_SECT_SIZE of data from/to the + * ATA device for the DRQ request. + * + * LOCKING: + * Inherited from caller. + */ + +static void ata_pio_sectors(struct ata_queued_cmd *qc) +{ + if (is_multi_taskfile(&qc->tf)) { + /* READ/WRITE MULTIPLE */ + unsigned int nsect; - /* do the actual data transfer */ - do_write = (qc->tf.flags & ATA_TFLAG_WRITE); - ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write); + WARN_ON(qc->dev->multi_count == 0); - kunmap(page); + nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count); + while (nsect--) + ata_pio_sector(qc); + } else + ata_pio_sector(qc); +} + +/** + * atapi_send_cdb - Write CDB bytes to hardware + * @ap: Port to which ATAPI device is attached. + * @qc: Taskfile currently active + * + * When device has indicated its readiness to accept + * a CDB, this function is called. Send the CDB. + * + * LOCKING: + * caller. + */ + +static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) +{ + /* send SCSI cdb */ + DPRINTK("send cdb\n"); + WARN_ON(qc->dev->cdb_len < 12); + + ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); + ata_altstatus(ap); /* flush */ + + switch (qc->tf.protocol) { + case ATA_PROT_ATAPI: + ap->hsm_task_state = HSM_ST; + break; + case ATA_PROT_ATAPI_NODATA: + ap->hsm_task_state = HSM_ST_LAST; + break; + case ATA_PROT_ATAPI_DMA: + ap->hsm_task_state = HSM_ST_LAST; + /* initiate bmdma */ + ap->ops->bmdma_start(qc); + break; + } } /** @@ -3492,8 +3792,8 @@ next_sg: unsigned int i; if (words) /* warning if bytes > 1 */ - printk(KERN_WARNING "ata%u: %u bytes trailing data\n", - ap->id, bytes); + ata_dev_printk(qc->dev, KERN_WARNING, + "%u bytes trailing data\n", bytes); for (i = 0; i < words; i++) ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write); @@ -3517,7 +3817,23 @@ next_sg: /* don't cross page boundaries */ count = min(count, (unsigned int)PAGE_SIZE - offset); - buf = kmap(page) + offset; + DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); + + if (PageHighMem(page)) { + unsigned long flags; + + local_irq_save(flags); + buf = kmap_atomic(page, KM_IRQ0); + + /* do the actual data transfer */ + ata_data_xfer(ap, buf + offset, count, do_write); + + kunmap_atomic(buf, KM_IRQ0); + local_irq_restore(flags); + } else { + buf = page_address(page); + ata_data_xfer(ap, buf + offset, count, do_write); + } bytes -= count; qc->curbytes += count; @@ -3528,13 +3844,6 @@ next_sg: qc->cursg_ofs = 0; } - DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); - - /* do the actual data transfer */ - ata_data_xfer(ap, buf, count, do_write); - - kunmap(page); - if (bytes) goto next_sg; } @@ -3556,10 +3865,16 @@ static void atapi_pio_bytes(struct ata_queued_cmd *qc) unsigned int ireason, bc_lo, bc_hi, bytes; int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; - ap->ops->tf_read(ap, &qc->tf); - ireason = qc->tf.nsect; - bc_lo = qc->tf.lbam; - bc_hi = qc->tf.lbah; + /* Abuse qc->result_tf for temp storage of intermediate TF + * here to save some kernel stack usage. + * For normal completion, qc->result_tf is not relevant. For + * error, qc->result_tf is later overwritten by ata_qc_complete(). + * So, the correctness of qc->result_tf is not affected. + */ + ap->ops->tf_read(ap, &qc->result_tf); + ireason = qc->result_tf.nsect; + bc_lo = qc->result_tf.lbam; + bc_hi = qc->result_tf.lbah; bytes = (bc_hi << 8) | bc_lo; /* shall be cleared to zero, indicating xfer of data */ @@ -3571,302 +3886,364 @@ static void atapi_pio_bytes(struct ata_queued_cmd *qc) if (do_write != i_write) goto err_out; + VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes); + __atapi_pio_bytes(qc, bytes); return; err_out: - printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n", - ap->id, dev->devno); + ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); qc->err_mask |= AC_ERR_HSM; ap->hsm_task_state = HSM_ST_ERR; } /** - * ata_pio_block - start PIO on a block + * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. * @ap: the target ata_port + * @qc: qc on going * - * LOCKING: - * None. (executing in kernel thread context) + * RETURNS: + * 1 if ok in workqueue, 0 otherwise. */ -static void ata_pio_block(struct ata_port *ap) +static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) { - struct ata_queued_cmd *qc; - u8 status; - - /* - * This is purely heuristic. This is a fast path. - * Sometimes when we enter, BSY will be cleared in - * a chk-status or two. If not, the drive is probably seeking - * or something. Snooze for a couple msecs, then - * chk-status again. If still busy, fall back to - * HSM_ST_POLL state. - */ - status = ata_busy_wait(ap, ATA_BUSY, 5); - if (status & ATA_BUSY) { - msleep(2); - status = ata_busy_wait(ap, ATA_BUSY, 10); - if (status & ATA_BUSY) { - ap->hsm_task_state = HSM_ST_POLL; - ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; - return; - } - } - - qc = ata_qc_from_tag(ap, ap->active_tag); - WARN_ON(qc == NULL); - - /* check error */ - if (status & (ATA_ERR | ATA_DF)) { - qc->err_mask |= AC_ERR_DEV; - ap->hsm_task_state = HSM_ST_ERR; - return; - } - - /* transfer data if any */ - if (is_atapi_taskfile(&qc->tf)) { - /* DRQ=0 means no more data to transfer */ - if ((status & ATA_DRQ) == 0) { - ap->hsm_task_state = HSM_ST_LAST; - return; - } + if (qc->tf.flags & ATA_TFLAG_POLLING) + return 1; - atapi_pio_bytes(qc); - } else { - /* handle BSY=0, DRQ=0 as error */ - if ((status & ATA_DRQ) == 0) { - qc->err_mask |= AC_ERR_HSM; - ap->hsm_task_state = HSM_ST_ERR; - return; - } + if (ap->hsm_task_state == HSM_ST_FIRST) { + if (qc->tf.protocol == ATA_PROT_PIO && + (qc->tf.flags & ATA_TFLAG_WRITE)) + return 1; - ata_pio_sector(qc); + if (is_atapi_taskfile(&qc->tf) && + !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) + return 1; } -} - -static void ata_pio_error(struct ata_port *ap) -{ - struct ata_queued_cmd *qc; - - qc = ata_qc_from_tag(ap, ap->active_tag); - WARN_ON(qc == NULL); - - if (qc->tf.command != ATA_CMD_PACKET) - printk(KERN_WARNING "ata%u: PIO error\n", ap->id); - /* make sure qc->err_mask is available to - * know what's wrong and recover - */ - WARN_ON(qc->err_mask == 0); - - ap->hsm_task_state = HSM_ST_IDLE; - - ata_poll_qc_complete(qc); + return 0; } -static void ata_pio_task(void *_data) +/** + * ata_hsm_qc_complete - finish a qc running on standard HSM + * @qc: Command to complete + * @in_wq: 1 if called from workqueue, 0 otherwise + * + * Finish @qc which is running on standard HSM. + * + * LOCKING: + * If @in_wq is zero, spin_lock_irqsave(host_set lock). + * Otherwise, none on entry and grabs host lock. + */ +static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) { - struct ata_port *ap = _data; - unsigned long timeout; - int qc_completed; - -fsm_start: - timeout = 0; - qc_completed = 0; - - switch (ap->hsm_task_state) { - case HSM_ST_IDLE: - return; - - case HSM_ST: - ata_pio_block(ap); - break; + struct ata_port *ap = qc->ap; + unsigned long flags; - case HSM_ST_LAST: - qc_completed = ata_pio_complete(ap); - break; + if (ap->ops->error_handler) { + if (in_wq) { + spin_lock_irqsave(&ap->host_set->lock, flags); - case HSM_ST_POLL: - case HSM_ST_LAST_POLL: - timeout = ata_pio_poll(ap); - break; + /* EH might have kicked in while host_set lock + * is released. + */ + qc = ata_qc_from_tag(ap, qc->tag); + if (qc) { + if (likely(!(qc->err_mask & AC_ERR_HSM))) { + ata_irq_on(ap); + ata_qc_complete(qc); + } else + ata_port_freeze(ap); + } - case HSM_ST_TMOUT: - case HSM_ST_ERR: - ata_pio_error(ap); - return; + spin_unlock_irqrestore(&ap->host_set->lock, flags); + } else { + if (likely(!(qc->err_mask & AC_ERR_HSM))) + ata_qc_complete(qc); + else + ata_port_freeze(ap); + } + } else { + if (in_wq) { + spin_lock_irqsave(&ap->host_set->lock, flags); + ata_irq_on(ap); + ata_qc_complete(qc); + spin_unlock_irqrestore(&ap->host_set->lock, flags); + } else + ata_qc_complete(qc); } - - if (timeout) - ata_port_queue_task(ap, ata_pio_task, ap, timeout); - else if (!qc_completed) - goto fsm_start; } /** - * atapi_packet_task - Write CDB bytes to hardware - * @_data: Port to which ATAPI device is attached. - * - * When device has indicated its readiness to accept - * a CDB, this function is called. Send the CDB. - * If DMA is to be performed, exit immediately. - * Otherwise, we are in polling mode, so poll - * status under operation succeeds or fails. + * ata_hsm_move - move the HSM to the next state. + * @ap: the target ata_port + * @qc: qc on going + * @status: current device status + * @in_wq: 1 if called from workqueue, 0 otherwise * - * LOCKING: - * Kernel thread context (may sleep) + * RETURNS: + * 1 when poll next status needed, 0 otherwise. */ -static void atapi_packet_task(void *_data) +static int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, + u8 status, int in_wq) { - struct ata_port *ap = _data; - struct ata_queued_cmd *qc; - u8 status; + unsigned long flags = 0; + int poll_next; - qc = ata_qc_from_tag(ap, ap->active_tag); - WARN_ON(qc == NULL); - WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); + WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); - /* sleep-wait for BSY to clear */ - DPRINTK("busy wait\n"); - if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) { - qc->err_mask |= AC_ERR_TIMEOUT; - goto err_out; - } + /* Make sure ata_qc_issue_prot() does not throw things + * like DMA polling into the workqueue. Notice that + * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). + */ + WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); - /* make sure DRQ is set */ - status = ata_chk_status(ap); - if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) { - qc->err_mask |= AC_ERR_HSM; - goto err_out; - } +fsm_start: + DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", + ap->id, qc->tf.protocol, ap->hsm_task_state, status); - /* send SCSI cdb */ - DPRINTK("send cdb\n"); - WARN_ON(qc->dev->cdb_len < 12); + switch (ap->hsm_task_state) { + case HSM_ST_FIRST: + /* Send first data block or PACKET CDB */ - if (qc->tf.protocol == ATA_PROT_ATAPI_DMA || - qc->tf.protocol == ATA_PROT_ATAPI_NODATA) { - unsigned long flags; + /* If polling, we will stay in the work queue after + * sending the data. Otherwise, interrupt handler + * takes over after sending the data. + */ + poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); + + /* check device status */ + if (unlikely((status & ATA_DRQ) == 0)) { + /* handle BSY=0, DRQ=0 as error */ + if (likely(status & (ATA_ERR | ATA_DF))) + /* device stops HSM for abort/error */ + qc->err_mask |= AC_ERR_DEV; + else + /* HSM violation. Let EH handle this */ + qc->err_mask |= AC_ERR_HSM; + + ap->hsm_task_state = HSM_ST_ERR; + goto fsm_start; + } - /* Once we're done issuing command and kicking bmdma, - * irq handler takes over. To not lose irq, we need - * to clear NOINTR flag before sending cdb, but - * interrupt handler shouldn't be invoked before we're - * finished. Hence, the following locking. + /* Device should not ask for data transfer (DRQ=1) + * when it finds something wrong. + * We ignore DRQ here and stop the HSM by + * changing hsm_task_state to HSM_ST_ERR and + * let the EH abort the command or reset the device. */ - spin_lock_irqsave(&ap->host_set->lock, flags); - ap->flags &= ~ATA_FLAG_NOINTR; - ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); - if (qc->tf.protocol == ATA_PROT_ATAPI_DMA) - ap->ops->bmdma_start(qc); /* initiate bmdma */ - spin_unlock_irqrestore(&ap->host_set->lock, flags); - } else { - ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); + if (unlikely(status & (ATA_ERR | ATA_DF))) { + printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", + ap->id, status); + qc->err_mask |= AC_ERR_HSM; + ap->hsm_task_state = HSM_ST_ERR; + goto fsm_start; + } - /* PIO commands are handled by polling */ - ap->hsm_task_state = HSM_ST; - ata_port_queue_task(ap, ata_pio_task, ap, 0); - } + /* Send the CDB (atapi) or the first data block (ata pio out). + * During the state transition, interrupt handler shouldn't + * be invoked before the data transfer is complete and + * hsm_task_state is changed. Hence, the following locking. + */ + if (in_wq) + spin_lock_irqsave(&ap->host_set->lock, flags); - return; + if (qc->tf.protocol == ATA_PROT_PIO) { + /* PIO data out protocol. + * send first data block. + */ -err_out: - ata_poll_qc_complete(qc); -} + /* ata_pio_sectors() might change the state + * to HSM_ST_LAST. so, the state is changed here + * before ata_pio_sectors(). + */ + ap->hsm_task_state = HSM_ST; + ata_pio_sectors(qc); + ata_altstatus(ap); /* flush */ + } else + /* send CDB */ + atapi_send_cdb(ap, qc); + + if (in_wq) + spin_unlock_irqrestore(&ap->host_set->lock, flags); + + /* if polling, ata_pio_task() handles the rest. + * otherwise, interrupt handler takes over from here. + */ + break; -/** - * ata_qc_timeout - Handle timeout of queued command - * @qc: Command that timed out - * - * Some part of the kernel (currently, only the SCSI layer) - * has noticed that the active command on port @ap has not - * completed after a specified length of time. Handle this - * condition by disabling DMA (if necessary) and completing - * transactions, with error if necessary. - * - * This also handles the case of the "lost interrupt", where - * for some reason (possibly hardware bug, possibly driver bug) - * an interrupt was not delivered to the driver, even though the - * transaction completed successfully. - * - * LOCKING: - * Inherited from SCSI layer (none, can sleep) - */ + case HSM_ST: + /* complete command or read/write the data register */ + if (qc->tf.protocol == ATA_PROT_ATAPI) { + /* ATAPI PIO protocol */ + if ((status & ATA_DRQ) == 0) { + /* No more data to transfer or device error. + * Device error will be tagged in HSM_ST_LAST. + */ + ap->hsm_task_state = HSM_ST_LAST; + goto fsm_start; + } -static void ata_qc_timeout(struct ata_queued_cmd *qc) -{ - struct ata_port *ap = qc->ap; - struct ata_host_set *host_set = ap->host_set; - u8 host_stat = 0, drv_stat; - unsigned long flags; + /* Device should not ask for data transfer (DRQ=1) + * when it finds something wrong. + * We ignore DRQ here and stop the HSM by + * changing hsm_task_state to HSM_ST_ERR and + * let the EH abort the command or reset the device. + */ + if (unlikely(status & (ATA_ERR | ATA_DF))) { + printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", + ap->id, status); + qc->err_mask |= AC_ERR_HSM; + ap->hsm_task_state = HSM_ST_ERR; + goto fsm_start; + } - DPRINTK("ENTER\n"); + atapi_pio_bytes(qc); - ap->hsm_task_state = HSM_ST_IDLE; + if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) + /* bad ireason reported by device */ + goto fsm_start; - spin_lock_irqsave(&host_set->lock, flags); + } else { + /* ATA PIO protocol */ + if (unlikely((status & ATA_DRQ) == 0)) { + /* handle BSY=0, DRQ=0 as error */ + if (likely(status & (ATA_ERR | ATA_DF))) + /* device stops HSM for abort/error */ + qc->err_mask |= AC_ERR_DEV; + else + /* HSM violation. Let EH handle this */ + qc->err_mask |= AC_ERR_HSM; + + ap->hsm_task_state = HSM_ST_ERR; + goto fsm_start; + } - switch (qc->tf.protocol) { + /* For PIO reads, some devices may ask for + * data transfer (DRQ=1) alone with ERR=1. + * We respect DRQ here and transfer one + * block of junk data before changing the + * hsm_task_state to HSM_ST_ERR. + * + * For PIO writes, ERR=1 DRQ=1 doesn't make + * sense since the data block has been + * transferred to the device. + */ + if (unlikely(status & (ATA_ERR | ATA_DF))) { + /* data might be corrputed */ + qc->err_mask |= AC_ERR_DEV; + + if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { + ata_pio_sectors(qc); + ata_altstatus(ap); + status = ata_wait_idle(ap); + } + + if (status & (ATA_BUSY | ATA_DRQ)) + qc->err_mask |= AC_ERR_HSM; + + /* ata_pio_sectors() might change the + * state to HSM_ST_LAST. so, the state + * is changed after ata_pio_sectors(). + */ + ap->hsm_task_state = HSM_ST_ERR; + goto fsm_start; + } - case ATA_PROT_DMA: - case ATA_PROT_ATAPI_DMA: - host_stat = ap->ops->bmdma_status(ap); + ata_pio_sectors(qc); - /* before we do anything else, clear DMA-Start bit */ - ap->ops->bmdma_stop(qc); + if (ap->hsm_task_state == HSM_ST_LAST && + (!(qc->tf.flags & ATA_TFLAG_WRITE))) { + /* all data read */ + ata_altstatus(ap); + status = ata_wait_idle(ap); + goto fsm_start; + } + } - /* fall through */ + ata_altstatus(ap); /* flush */ + poll_next = 1; + break; - default: - ata_altstatus(ap); - drv_stat = ata_chk_status(ap); + case HSM_ST_LAST: + if (unlikely(!ata_ok(status))) { + qc->err_mask |= __ac_err_mask(status); + ap->hsm_task_state = HSM_ST_ERR; + goto fsm_start; + } - /* ack bmdma irq events */ - ap->ops->irq_clear(ap); + /* no more data to transfer */ + DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", + ap->id, qc->dev->devno, status); - printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n", - ap->id, qc->tf.command, drv_stat, host_stat); + WARN_ON(qc->err_mask); + + ap->hsm_task_state = HSM_ST_IDLE; /* complete taskfile transaction */ - qc->err_mask |= ac_err_mask(drv_stat); + ata_hsm_qc_complete(qc, in_wq); + + poll_next = 0; break; - } - spin_unlock_irqrestore(&host_set->lock, flags); + case HSM_ST_ERR: + /* make sure qc->err_mask is available to + * know what's wrong and recover + */ + WARN_ON(qc->err_mask == 0); - ata_eh_qc_complete(qc); + ap->hsm_task_state = HSM_ST_IDLE; - DPRINTK("EXIT\n"); -} + /* complete taskfile transaction */ + ata_hsm_qc_complete(qc, in_wq); -/** - * ata_eng_timeout - Handle timeout of queued command - * @ap: Port on which timed-out command is active - * - * Some part of the kernel (currently, only the SCSI layer) - * has noticed that the active command on port @ap has not - * completed after a specified length of time. Handle this - * condition by disabling DMA (if necessary) and completing - * transactions, with error if necessary. - * - * This also handles the case of the "lost interrupt", where - * for some reason (possibly hardware bug, possibly driver bug) - * an interrupt was not delivered to the driver, even though the - * transaction completed successfully. - * - * LOCKING: - * Inherited from SCSI layer (none, can sleep) - */ + poll_next = 0; + break; + default: + poll_next = 0; + BUG(); + } -void ata_eng_timeout(struct ata_port *ap) + return poll_next; +} + +static void ata_pio_task(void *_data) { - DPRINTK("ENTER\n"); + struct ata_queued_cmd *qc = _data; + struct ata_port *ap = qc->ap; + u8 status; + int poll_next; - ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag)); +fsm_start: + WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); - DPRINTK("EXIT\n"); + /* + * This is purely heuristic. This is a fast path. + * Sometimes when we enter, BSY will be cleared in + * a chk-status or two. If not, the drive is probably seeking + * or something. Snooze for a couple msecs, then + * chk-status again. If still busy, queue delayed work. + */ + status = ata_busy_wait(ap, ATA_BUSY, 5); + if (status & ATA_BUSY) { + msleep(2); + status = ata_busy_wait(ap, ATA_BUSY, 10); + if (status & ATA_BUSY) { + ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); + return; + } + } + + /* move the HSM */ + poll_next = ata_hsm_move(ap, qc, status, 1); + + /* another command or interrupt handler + * may be running at this point. + */ + if (poll_next) + goto fsm_start; } /** @@ -3883,9 +4260,14 @@ static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) struct ata_queued_cmd *qc = NULL; unsigned int i; - for (i = 0; i < ATA_MAX_QUEUE; i++) - if (!test_and_set_bit(i, &ap->qactive)) { - qc = ata_qc_from_tag(ap, i); + /* no command while frozen */ + if (unlikely(ap->flags & ATA_FLAG_FROZEN)) + return NULL; + + /* the last tag is reserved for internal command. */ + for (i = 0; i < ATA_MAX_QUEUE - 1; i++) + if (!test_and_set_bit(i, &ap->qc_allocated)) { + qc = __ata_qc_from_tag(ap, i); break; } @@ -3897,16 +4279,15 @@ static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) /** * ata_qc_new_init - Request an available ATA command, and initialize it - * @ap: Port associated with device @dev * @dev: Device from whom we request an available command structure * * LOCKING: * None. */ -struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, - struct ata_device *dev) +struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) { + struct ata_port *ap = dev->ap; struct ata_queued_cmd *qc; qc = ata_qc_new(ap); @@ -3941,36 +4322,153 @@ void ata_qc_free(struct ata_queued_cmd *qc) qc->flags = 0; tag = qc->tag; if (likely(ata_tag_valid(tag))) { - if (tag == ap->active_tag) - ap->active_tag = ATA_TAG_POISON; qc->tag = ATA_TAG_POISON; - clear_bit(tag, &ap->qactive); + clear_bit(tag, &ap->qc_allocated); } } void __ata_qc_complete(struct ata_queued_cmd *qc) { + struct ata_port *ap = qc->ap; + WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) ata_sg_clean(qc); + /* command should be marked inactive atomically with qc completion */ + if (qc->tf.protocol == ATA_PROT_NCQ) + ap->sactive &= ~(1 << qc->tag); + else + ap->active_tag = ATA_TAG_POISON; + /* atapi: mark qc as inactive to prevent the interrupt handler * from completing the command twice later, before the error handler * is called. (when rc != 0 and atapi request sense is needed) */ qc->flags &= ~ATA_QCFLAG_ACTIVE; + ap->qc_active &= ~(1 << qc->tag); /* call completion callback */ qc->complete_fn(qc); } +/** + * ata_qc_complete - Complete an active ATA command + * @qc: Command to complete + * @err_mask: ATA Status register contents + * + * Indicate to the mid and upper layers that an ATA + * command has completed, with either an ok or not-ok status. + * + * LOCKING: + * spin_lock_irqsave(host_set lock) + */ +void ata_qc_complete(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + + /* XXX: New EH and old EH use different mechanisms to + * synchronize EH with regular execution path. + * + * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. + * Normal execution path is responsible for not accessing a + * failed qc. libata core enforces the rule by returning NULL + * from ata_qc_from_tag() for failed qcs. + * + * Old EH depends on ata_qc_complete() nullifying completion + * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does + * not synchronize with interrupt handler. Only PIO task is + * taken care of. + */ + if (ap->ops->error_handler) { + WARN_ON(ap->flags & ATA_FLAG_FROZEN); + + if (unlikely(qc->err_mask)) + qc->flags |= ATA_QCFLAG_FAILED; + + if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { + if (!ata_tag_internal(qc->tag)) { + /* always fill result TF for failed qc */ + ap->ops->tf_read(ap, &qc->result_tf); + ata_qc_schedule_eh(qc); + return; + } + } + + /* read result TF if requested */ + if (qc->flags & ATA_QCFLAG_RESULT_TF) + ap->ops->tf_read(ap, &qc->result_tf); + + __ata_qc_complete(qc); + } else { + if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) + return; + + /* read result TF if failed or requested */ + if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) + ap->ops->tf_read(ap, &qc->result_tf); + + __ata_qc_complete(qc); + } +} + +/** + * ata_qc_complete_multiple - Complete multiple qcs successfully + * @ap: port in question + * @qc_active: new qc_active mask + * @finish_qc: LLDD callback invoked before completing a qc + * + * Complete in-flight commands. This functions is meant to be + * called from low-level driver's interrupt routine to complete + * requests normally. ap->qc_active and @qc_active is compared + * and commands are completed accordingly. + * + * LOCKING: + * spin_lock_irqsave(host_set lock) + * + * RETURNS: + * Number of completed commands on success, -errno otherwise. + */ +int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, + void (*finish_qc)(struct ata_queued_cmd *)) +{ + int nr_done = 0; + u32 done_mask; + int i; + + done_mask = ap->qc_active ^ qc_active; + + if (unlikely(done_mask & qc_active)) { + ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " + "(%08x->%08x)\n", ap->qc_active, qc_active); + return -EINVAL; + } + + for (i = 0; i < ATA_MAX_QUEUE; i++) { + struct ata_queued_cmd *qc; + + if (!(done_mask & (1 << i))) + continue; + + if ((qc = ata_qc_from_tag(ap, i))) { + if (finish_qc) + finish_qc(qc); + ata_qc_complete(qc); + nr_done++; + } + } + + return nr_done; +} + static inline int ata_should_dma_map(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; switch (qc->tf.protocol) { + case ATA_PROT_NCQ: case ATA_PROT_DMA: case ATA_PROT_ATAPI_DMA: return 1; @@ -4005,8 +4503,22 @@ void ata_qc_issue(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; - qc->ap->active_tag = qc->tag; + /* Make sure only one non-NCQ command is outstanding. The + * check is skipped for old EH because it reuses active qc to + * request ATAPI sense. + */ + WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); + + if (qc->tf.protocol == ATA_PROT_NCQ) { + WARN_ON(ap->sactive & (1 << qc->tag)); + ap->sactive |= 1 << qc->tag; + } else { + WARN_ON(ap->sactive); + ap->active_tag = qc->tag; + } + qc->flags |= ATA_QCFLAG_ACTIVE; + ap->qc_active |= 1 << qc->tag; if (ata_should_dma_map(qc)) { if (qc->flags & ATA_QCFLAG_SG) { @@ -4056,43 +4568,105 @@ unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; + /* Use polling pio if the LLD doesn't handle + * interrupt driven pio and atapi CDB interrupt. + */ + if (ap->flags & ATA_FLAG_PIO_POLLING) { + switch (qc->tf.protocol) { + case ATA_PROT_PIO: + case ATA_PROT_ATAPI: + case ATA_PROT_ATAPI_NODATA: + qc->tf.flags |= ATA_TFLAG_POLLING; + break; + case ATA_PROT_ATAPI_DMA: + if (qc->dev->flags & ATA_DFLAG_CDB_INTR) + /* see ata_check_atapi_dma() */ + BUG(); + break; + default: + break; + } + } + + /* select the device */ ata_dev_select(ap, qc->dev->devno, 1, 0); + /* start the command */ switch (qc->tf.protocol) { case ATA_PROT_NODATA: + if (qc->tf.flags & ATA_TFLAG_POLLING) + ata_qc_set_polling(qc); + ata_tf_to_host(ap, &qc->tf); + ap->hsm_task_state = HSM_ST_LAST; + + if (qc->tf.flags & ATA_TFLAG_POLLING) + ata_port_queue_task(ap, ata_pio_task, qc, 0); + break; case ATA_PROT_DMA: + WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); + ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ ap->ops->bmdma_setup(qc); /* set up bmdma */ ap->ops->bmdma_start(qc); /* initiate bmdma */ + ap->hsm_task_state = HSM_ST_LAST; break; - case ATA_PROT_PIO: /* load tf registers, initiate polling pio */ - ata_qc_set_polling(qc); - ata_tf_to_host(ap, &qc->tf); - ap->hsm_task_state = HSM_ST; - ata_port_queue_task(ap, ata_pio_task, ap, 0); - break; + case ATA_PROT_PIO: + if (qc->tf.flags & ATA_TFLAG_POLLING) + ata_qc_set_polling(qc); - case ATA_PROT_ATAPI: - ata_qc_set_polling(qc); ata_tf_to_host(ap, &qc->tf); - ata_port_queue_task(ap, atapi_packet_task, ap, 0); + + if (qc->tf.flags & ATA_TFLAG_WRITE) { + /* PIO data out protocol */ + ap->hsm_task_state = HSM_ST_FIRST; + ata_port_queue_task(ap, ata_pio_task, qc, 0); + + /* always send first data block using + * the ata_pio_task() codepath. + */ + } else { + /* PIO data in protocol */ + ap->hsm_task_state = HSM_ST; + + if (qc->tf.flags & ATA_TFLAG_POLLING) + ata_port_queue_task(ap, ata_pio_task, qc, 0); + + /* if polling, ata_pio_task() handles the rest. + * otherwise, interrupt handler takes over from here. + */ + } + break; + case ATA_PROT_ATAPI: case ATA_PROT_ATAPI_NODATA: - ap->flags |= ATA_FLAG_NOINTR; + if (qc->tf.flags & ATA_TFLAG_POLLING) + ata_qc_set_polling(qc); + ata_tf_to_host(ap, &qc->tf); - ata_port_queue_task(ap, atapi_packet_task, ap, 0); + + ap->hsm_task_state = HSM_ST_FIRST; + + /* send cdb by polling if no cdb interrupt */ + if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || + (qc->tf.flags & ATA_TFLAG_POLLING)) + ata_port_queue_task(ap, ata_pio_task, qc, 0); break; case ATA_PROT_ATAPI_DMA: - ap->flags |= ATA_FLAG_NOINTR; + WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); + ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ ap->ops->bmdma_setup(qc); /* set up bmdma */ - ata_port_queue_task(ap, atapi_packet_task, ap, 0); + ap->hsm_task_state = HSM_ST_FIRST; + + /* send cdb by polling if no cdb interrupt */ + if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) + ata_port_queue_task(ap, ata_pio_task, qc, 0); break; default: @@ -4122,52 +4696,66 @@ unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) inline unsigned int ata_host_intr (struct ata_port *ap, struct ata_queued_cmd *qc) { - u8 status, host_stat; - - switch (qc->tf.protocol) { + u8 status, host_stat = 0; - case ATA_PROT_DMA: - case ATA_PROT_ATAPI_DMA: - case ATA_PROT_ATAPI: - /* check status of DMA engine */ - host_stat = ap->ops->bmdma_status(ap); - VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); + VPRINTK("ata%u: protocol %d task_state %d\n", + ap->id, qc->tf.protocol, ap->hsm_task_state); - /* if it's not our irq... */ - if (!(host_stat & ATA_DMA_INTR)) - goto idle_irq; - - /* before we do anything else, clear DMA-Start bit */ - ap->ops->bmdma_stop(qc); - - /* fall through */ - - case ATA_PROT_ATAPI_NODATA: - case ATA_PROT_NODATA: - /* check altstatus */ - status = ata_altstatus(ap); - if (status & ATA_BUSY) - goto idle_irq; + /* Check whether we are expecting interrupt in this state */ + switch (ap->hsm_task_state) { + case HSM_ST_FIRST: + /* Some pre-ATAPI-4 devices assert INTRQ + * at this state when ready to receive CDB. + */ - /* check main status, clearing INTRQ */ - status = ata_chk_status(ap); - if (unlikely(status & ATA_BUSY)) + /* Check the ATA_DFLAG_CDB_INTR flag is enough here. + * The flag was turned on only for atapi devices. + * No need to check is_atapi_taskfile(&qc->tf) again. + */ + if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) goto idle_irq; - DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", - ap->id, qc->tf.protocol, status); - - /* ack bmdma irq events */ - ap->ops->irq_clear(ap); - - /* complete taskfile transaction */ - qc->err_mask |= ac_err_mask(status); - ata_qc_complete(qc); break; - + case HSM_ST_LAST: + if (qc->tf.protocol == ATA_PROT_DMA || + qc->tf.protocol == ATA_PROT_ATAPI_DMA) { + /* check status of DMA engine */ + host_stat = ap->ops->bmdma_status(ap); + VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); + + /* if it's not our irq... */ + if (!(host_stat & ATA_DMA_INTR)) + goto idle_irq; + + /* before we do anything else, clear DMA-Start bit */ + ap->ops->bmdma_stop(qc); + + if (unlikely(host_stat & ATA_DMA_ERR)) { + /* error when transfering data to/from memory */ + qc->err_mask |= AC_ERR_HOST_BUS; + ap->hsm_task_state = HSM_ST_ERR; + } + } + break; + case HSM_ST: + break; default: goto idle_irq; } + /* check altstatus */ + status = ata_altstatus(ap); + if (status & ATA_BUSY) + goto idle_irq; + + /* check main status, clearing INTRQ */ + status = ata_chk_status(ap); + if (unlikely(status & ATA_BUSY)) + goto idle_irq; + + /* ack bmdma irq events */ + ap->ops->irq_clear(ap); + + ata_hsm_move(ap, qc, status, 0); return 1; /* irq handled */ idle_irq: @@ -4176,7 +4764,7 @@ idle_irq: #ifdef ATA_IRQ_TRAP if ((ap->stats.idle_irq % 1000) == 0) { ata_irq_ack(ap, 0); /* debug trap */ - printk(KERN_WARNING "ata%d: irq trap\n", ap->id); + ata_port_printk(ap, KERN_WARNING, "irq trap\n"); return 1; } #endif @@ -4214,11 +4802,11 @@ irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) ap = host_set->ports[i]; if (ap && - !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) { + !(ap->flags & ATA_FLAG_DISABLED)) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN)) && + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && (qc->flags & ATA_QCFLAG_ACTIVE)) handled |= ata_host_intr(ap, qc); } @@ -4229,32 +4817,168 @@ irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) return IRQ_RETVAL(handled); } +/** + * sata_scr_valid - test whether SCRs are accessible + * @ap: ATA port to test SCR accessibility for + * + * Test whether SCRs are accessible for @ap. + * + * LOCKING: + * None. + * + * RETURNS: + * 1 if SCRs are accessible, 0 otherwise. + */ +int sata_scr_valid(struct ata_port *ap) +{ + return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read; +} + +/** + * sata_scr_read - read SCR register of the specified port + * @ap: ATA port to read SCR for + * @reg: SCR to read + * @val: Place to store read value + * + * Read SCR register @reg of @ap into *@val. This function is + * guaranteed to succeed if the cable type of the port is SATA + * and the port implements ->scr_read. + * + * LOCKING: + * None. + * + * RETURNS: + * 0 on success, negative errno on failure. + */ +int sata_scr_read(struct ata_port *ap, int reg, u32 *val) +{ + if (sata_scr_valid(ap)) { + *val = ap->ops->scr_read(ap, reg); + return 0; + } + return -EOPNOTSUPP; +} + +/** + * sata_scr_write - write SCR register of the specified port + * @ap: ATA port to write SCR for + * @reg: SCR to write + * @val: value to write + * + * Write @val to SCR register @reg of @ap. This function is + * guaranteed to succeed if the cable type of the port is SATA + * and the port implements ->scr_read. + * + * LOCKING: + * None. + * + * RETURNS: + * 0 on success, negative errno on failure. + */ +int sata_scr_write(struct ata_port *ap, int reg, u32 val) +{ + if (sata_scr_valid(ap)) { + ap->ops->scr_write(ap, reg, val); + return 0; + } + return -EOPNOTSUPP; +} + +/** + * sata_scr_write_flush - write SCR register of the specified port and flush + * @ap: ATA port to write SCR for + * @reg: SCR to write + * @val: value to write + * + * This function is identical to sata_scr_write() except that this + * function performs flush after writing to the register. + * + * LOCKING: + * None. + * + * RETURNS: + * 0 on success, negative errno on failure. + */ +int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) +{ + if (sata_scr_valid(ap)) { + ap->ops->scr_write(ap, reg, val); + ap->ops->scr_read(ap, reg); + return 0; + } + return -EOPNOTSUPP; +} + +/** + * ata_port_online - test whether the given port is online + * @ap: ATA port to test + * + * Test whether @ap is online. Note that this function returns 0 + * if online status of @ap cannot be obtained, so + * ata_port_online(ap) != !ata_port_offline(ap). + * + * LOCKING: + * None. + * + * RETURNS: + * 1 if the port online status is available and online. + */ +int ata_port_online(struct ata_port *ap) +{ + u32 sstatus; + + if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) + return 1; + return 0; +} + +/** + * ata_port_offline - test whether the given port is offline + * @ap: ATA port to test + * + * Test whether @ap is offline. Note that this function returns + * 0 if offline status of @ap cannot be obtained, so + * ata_port_online(ap) != !ata_port_offline(ap). + * + * LOCKING: + * None. + * + * RETURNS: + * 1 if the port offline status is available and offline. + */ +int ata_port_offline(struct ata_port *ap) +{ + u32 sstatus; + + if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) + return 1; + return 0; +} /* * Execute a 'simple' command, that only consists of the opcode 'cmd' itself, * without filling any other registers */ -static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev, - u8 cmd) +static int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) { struct ata_taskfile tf; int err; - ata_tf_init(ap, &tf, dev->devno); + ata_tf_init(dev, &tf); tf.command = cmd; tf.flags |= ATA_TFLAG_DEVICE; tf.protocol = ATA_PROT_NODATA; - err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); + err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); if (err) - printk(KERN_ERR "%s: ata command failed: %d\n", - __FUNCTION__, err); + ata_dev_printk(dev, KERN_ERR, "%s: ata command failed: %d\n", + __FUNCTION__, err); return err; } -static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev) +static int ata_flush_cache(struct ata_device *dev) { u8 cmd; @@ -4266,22 +4990,21 @@ static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev) else cmd = ATA_CMD_FLUSH; - return ata_do_simple_cmd(ap, dev, cmd); + return ata_do_simple_cmd(dev, cmd); } -static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev) +static int ata_standby_drive(struct ata_device *dev) { - return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1); + return ata_do_simple_cmd(dev, ATA_CMD_STANDBYNOW1); } -static int ata_start_drive(struct ata_port *ap, struct ata_device *dev) +static int ata_start_drive(struct ata_device *dev) { - return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE); + return ata_do_simple_cmd(dev, ATA_CMD_IDLEIMMEDIATE); } /** * ata_device_resume - wakeup a previously suspended devices - * @ap: port the device is connected to * @dev: the device to resume * * Kick the drive back into action, by sending it an idle immediate @@ -4289,38 +5012,43 @@ static int ata_start_drive(struct ata_port *ap, struct ata_device *dev) * and host. * */ -int ata_device_resume(struct ata_port *ap, struct ata_device *dev) +int ata_device_resume(struct ata_device *dev) { + struct ata_port *ap = dev->ap; + if (ap->flags & ATA_FLAG_SUSPENDED) { + struct ata_device *failed_dev; ap->flags &= ~ATA_FLAG_SUSPENDED; - ata_set_mode(ap); + while (ata_set_mode(ap, &failed_dev)) + ata_dev_disable(failed_dev); } - if (!ata_dev_present(dev)) + if (!ata_dev_enabled(dev)) return 0; if (dev->class == ATA_DEV_ATA) - ata_start_drive(ap, dev); + ata_start_drive(dev); return 0; } /** * ata_device_suspend - prepare a device for suspend - * @ap: port the device is connected to * @dev: the device to suspend * @state: target power management state * * Flush the cache on the drive, if appropriate, then issue a * standbynow command. */ -int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state) +int ata_device_suspend(struct ata_device *dev, pm_message_t state) { - if (!ata_dev_present(dev)) + struct ata_port *ap = dev->ap; + + if (!ata_dev_enabled(dev)) return 0; if (dev->class == ATA_DEV_ATA) - ata_flush_cache(ap, dev); + ata_flush_cache(dev); if (state.event != PM_EVENT_FREEZE) - ata_standby_drive(ap, dev); + ata_standby_drive(dev); ap->flags |= ATA_FLAG_SUSPENDED; return 0; } @@ -4434,7 +5162,7 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, host->unique_id = ata_unique_id++; host->max_cmd_len = 12; - ap->flags = ATA_FLAG_PORT_DISABLED; + ap->flags = ATA_FLAG_DISABLED; ap->id = host->unique_id; ap->host = host; ap->ctl = ATA_DEVCTL_OBS; @@ -4448,15 +5176,21 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, ap->udma_mask = ent->udma_mask; ap->flags |= ent->host_flags; ap->ops = ent->port_ops; - ap->cbl = ATA_CBL_NONE; + ap->sata_spd_limit = UINT_MAX; ap->active_tag = ATA_TAG_POISON; ap->last_ctl = 0xFF; INIT_WORK(&ap->port_task, NULL, NULL); INIT_LIST_HEAD(&ap->eh_done_q); + /* set cable type */ + ap->cbl = ATA_CBL_NONE; + if (ap->flags & ATA_FLAG_SATA) + ap->cbl = ATA_CBL_SATA; + for (i = 0; i < ATA_MAX_DEVICES; i++) { struct ata_device *dev = &ap->device[i]; + dev->ap = ap; dev->devno = i; dev->pio_mask = UINT_MAX; dev->mwdma_mask = UINT_MAX; @@ -4509,7 +5243,7 @@ static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, host->transportt = &ata_scsi_transport_template; - ap = (struct ata_port *) &host->hostdata[0]; + ap = ata_shost_to_port(host); ata_host_init(ap, host, host_set, ent, port_no); @@ -4580,18 +5314,18 @@ int ata_device_add(const struct ata_probe_ent *ent) (ap->pio_mask << ATA_SHIFT_PIO); /* print per-port info to dmesg */ - printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX " - "bmdma 0x%lX irq %lu\n", - ap->id, - ap->flags & ATA_FLAG_SATA ? 'S' : 'P', - ata_mode_string(xfer_mode_mask), - ap->ioaddr.cmd_addr, - ap->ioaddr.ctl_addr, - ap->ioaddr.bmdma_addr, - ent->irq); + ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX " + "ctl 0x%lX bmdma 0x%lX irq %lu\n", + ap->flags & ATA_FLAG_SATA ? 'S' : 'P', + ata_mode_string(xfer_mode_mask), + ap->ioaddr.cmd_addr, + ap->ioaddr.ctl_addr, + ap->ioaddr.bmdma_addr, + ent->irq); ata_chk_status(ap); host_set->ops->irq_clear(ap); + ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */ count++; } @@ -4626,8 +5360,7 @@ int ata_device_add(const struct ata_probe_ent *ent) rc = scsi_add_host(ap->host, dev); if (rc) { - printk(KERN_ERR "ata%u: scsi_add_host failed\n", - ap->id); + ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n"); /* FIXME: do something useful here */ /* FIXME: handle unconditional calls to * scsi_scan_host and ata_host_remove, below, @@ -4722,15 +5455,12 @@ void ata_host_set_remove(struct ata_host_set *host_set) int ata_scsi_release(struct Scsi_Host *host) { - struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; - int i; + struct ata_port *ap = ata_shost_to_port(host); DPRINTK("ENTER\n"); ap->ops->port_disable(ap); ata_host_remove(ap, 0); - for (i = 0; i < ATA_MAX_DEVICES; i++) - kfree(ap->device[i].id); DPRINTK("EXIT\n"); return 1; @@ -4889,6 +5619,52 @@ int ata_ratelimit(void) return rc; } +/** + * ata_wait_register - wait until register value changes + * @reg: IO-mapped register + * @mask: Mask to apply to read register value + * @val: Wait condition + * @interval_msec: polling interval in milliseconds + * @timeout_msec: timeout in milliseconds + * + * Waiting for some bits of register to change is a common + * operation for ATA controllers. This function reads 32bit LE + * IO-mapped register @reg and tests for the following condition. + * + * (*@reg & mask) != val + * + * If the condition is met, it returns; otherwise, the process is + * repeated after @interval_msec until timeout. + * + * LOCKING: + * Kernel thread context (may sleep) + * + * RETURNS: + * The final register value. + */ +u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, + unsigned long interval_msec, + unsigned long timeout_msec) +{ + unsigned long timeout; + u32 tmp; + + tmp = ioread32(reg); + + /* Calculate timeout _after_ the first read to make sure + * preceding writes reach the controller before starting to + * eat away the timeout. + */ + timeout = jiffies + (timeout_msec * HZ) / 1000; + + while ((tmp & mask) == val && time_before(jiffies, timeout)) { + msleep(interval_msec); + tmp = ioread32(reg); + } + + return tmp; +} + /* * libata is essentially a library of internal helper functions for * low-level ATA host controller drivers. As such, the API/ABI is @@ -4902,9 +5678,9 @@ EXPORT_SYMBOL_GPL(ata_device_add); EXPORT_SYMBOL_GPL(ata_host_set_remove); EXPORT_SYMBOL_GPL(ata_sg_init); EXPORT_SYMBOL_GPL(ata_sg_init_one); -EXPORT_SYMBOL_GPL(__ata_qc_complete); +EXPORT_SYMBOL_GPL(ata_qc_complete); +EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); EXPORT_SYMBOL_GPL(ata_qc_issue_prot); -EXPORT_SYMBOL_GPL(ata_eng_timeout); EXPORT_SYMBOL_GPL(ata_tf_load); EXPORT_SYMBOL_GPL(ata_tf_read); EXPORT_SYMBOL_GPL(ata_noop_dev_select); @@ -4925,7 +5701,13 @@ EXPORT_SYMBOL_GPL(ata_bmdma_start); EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); EXPORT_SYMBOL_GPL(ata_bmdma_status); EXPORT_SYMBOL_GPL(ata_bmdma_stop); +EXPORT_SYMBOL_GPL(ata_bmdma_freeze); +EXPORT_SYMBOL_GPL(ata_bmdma_thaw); +EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); +EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); +EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); EXPORT_SYMBOL_GPL(ata_port_probe); +EXPORT_SYMBOL_GPL(sata_set_spd); EXPORT_SYMBOL_GPL(sata_phy_reset); EXPORT_SYMBOL_GPL(__sata_phy_reset); EXPORT_SYMBOL_GPL(ata_bus_reset); @@ -4940,18 +5722,24 @@ EXPORT_SYMBOL_GPL(ata_dev_classify); EXPORT_SYMBOL_GPL(ata_dev_pair); EXPORT_SYMBOL_GPL(ata_port_disable); EXPORT_SYMBOL_GPL(ata_ratelimit); +EXPORT_SYMBOL_GPL(ata_wait_register); EXPORT_SYMBOL_GPL(ata_busy_sleep); EXPORT_SYMBOL_GPL(ata_port_queue_task); EXPORT_SYMBOL_GPL(ata_scsi_ioctl); EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); EXPORT_SYMBOL_GPL(ata_scsi_slave_config); +EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); EXPORT_SYMBOL_GPL(ata_scsi_release); EXPORT_SYMBOL_GPL(ata_host_intr); +EXPORT_SYMBOL_GPL(sata_scr_valid); +EXPORT_SYMBOL_GPL(sata_scr_read); +EXPORT_SYMBOL_GPL(sata_scr_write); +EXPORT_SYMBOL_GPL(sata_scr_write_flush); +EXPORT_SYMBOL_GPL(ata_port_online); +EXPORT_SYMBOL_GPL(ata_port_offline); EXPORT_SYMBOL_GPL(ata_id_string); EXPORT_SYMBOL_GPL(ata_id_c_string); EXPORT_SYMBOL_GPL(ata_scsi_simulate); -EXPORT_SYMBOL_GPL(ata_eh_qc_complete); -EXPORT_SYMBOL_GPL(ata_eh_qc_retry); EXPORT_SYMBOL_GPL(ata_pio_need_iordy); EXPORT_SYMBOL_GPL(ata_timing_compute); @@ -4973,3 +5761,13 @@ EXPORT_SYMBOL_GPL(ata_device_suspend); EXPORT_SYMBOL_GPL(ata_device_resume); EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); EXPORT_SYMBOL_GPL(ata_scsi_device_resume); + +EXPORT_SYMBOL_GPL(ata_eng_timeout); +EXPORT_SYMBOL_GPL(ata_port_schedule_eh); +EXPORT_SYMBOL_GPL(ata_port_abort); +EXPORT_SYMBOL_GPL(ata_port_freeze); +EXPORT_SYMBOL_GPL(ata_eh_freeze_port); +EXPORT_SYMBOL_GPL(ata_eh_thaw_port); +EXPORT_SYMBOL_GPL(ata_eh_qc_complete); +EXPORT_SYMBOL_GPL(ata_eh_qc_retry); +EXPORT_SYMBOL_GPL(ata_do_eh); diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c new file mode 100644 index 0000000000000..71b45ad2c1247 --- /dev/null +++ b/drivers/scsi/libata-eh.c @@ -0,0 +1,1561 @@ +/* + * libata-eh.c - libata error handling + * + * Maintained by: Jeff Garzik <jgarzik@pobox.com> + * Please ALWAYS copy linux-ide@vger.kernel.org + * on emails. + * + * Copyright 2006 Tejun Heo <htejun@gmail.com> + * + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, + * USA. + * + * + * libata documentation is available via 'make {ps|pdf}docs', + * as Documentation/DocBook/libata.* + * + * Hardware documentation available from http://www.t13.org/ and + * http://www.sata-io.org/ + * + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <scsi/scsi.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_cmnd.h> +#include "scsi_transport_api.h" + +#include <linux/libata.h> + +#include "libata.h" + +static void __ata_port_freeze(struct ata_port *ap); + +static void ata_ering_record(struct ata_ering *ering, int is_io, + unsigned int err_mask) +{ + struct ata_ering_entry *ent; + + WARN_ON(!err_mask); + + ering->cursor++; + ering->cursor %= ATA_ERING_SIZE; + + ent = &ering->ring[ering->cursor]; + ent->is_io = is_io; + ent->err_mask = err_mask; + ent->timestamp = get_jiffies_64(); +} + +static struct ata_ering_entry * ata_ering_top(struct ata_ering *ering) +{ + struct ata_ering_entry *ent = &ering->ring[ering->cursor]; + if (!ent->err_mask) + return NULL; + return ent; +} + +static int ata_ering_map(struct ata_ering *ering, + int (*map_fn)(struct ata_ering_entry *, void *), + void *arg) +{ + int idx, rc = 0; + struct ata_ering_entry *ent; + + idx = ering->cursor; + do { + ent = &ering->ring[idx]; + if (!ent->err_mask) + break; + rc = map_fn(ent, arg); + if (rc) + break; + idx = (idx - 1 + ATA_ERING_SIZE) % ATA_ERING_SIZE; + } while (idx != ering->cursor); + + return rc; +} + +/** + * ata_scsi_timed_out - SCSI layer time out callback + * @cmd: timed out SCSI command + * + * Handles SCSI layer timeout. We race with normal completion of + * the qc for @cmd. If the qc is already gone, we lose and let + * the scsi command finish (EH_HANDLED). Otherwise, the qc has + * timed out and EH should be invoked. Prevent ata_qc_complete() + * from finishing it by setting EH_SCHEDULED and return + * EH_NOT_HANDLED. + * + * TODO: kill this function once old EH is gone. + * + * LOCKING: + * Called from timer context + * + * RETURNS: + * EH_HANDLED or EH_NOT_HANDLED + */ +enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) +{ + struct Scsi_Host *host = cmd->device->host; + struct ata_port *ap = ata_shost_to_port(host); + unsigned long flags; + struct ata_queued_cmd *qc; + enum scsi_eh_timer_return ret; + + DPRINTK("ENTER\n"); + + if (ap->ops->error_handler) { + ret = EH_NOT_HANDLED; + goto out; + } + + ret = EH_HANDLED; + spin_lock_irqsave(&ap->host_set->lock, flags); + qc = ata_qc_from_tag(ap, ap->active_tag); + if (qc) { + WARN_ON(qc->scsicmd != cmd); + qc->flags |= ATA_QCFLAG_EH_SCHEDULED; + qc->err_mask |= AC_ERR_TIMEOUT; + ret = EH_NOT_HANDLED; + } + spin_unlock_irqrestore(&ap->host_set->lock, flags); + + out: + DPRINTK("EXIT, ret=%d\n", ret); + return ret; +} + +/** + * ata_scsi_error - SCSI layer error handler callback + * @host: SCSI host on which error occurred + * + * Handles SCSI-layer-thrown error events. + * + * LOCKING: + * Inherited from SCSI layer (none, can sleep) + * + * RETURNS: + * Zero. + */ +void ata_scsi_error(struct Scsi_Host *host) +{ + struct ata_port *ap = ata_shost_to_port(host); + spinlock_t *hs_lock = &ap->host_set->lock; + int i, repeat_cnt = ATA_EH_MAX_REPEAT; + unsigned long flags; + + DPRINTK("ENTER\n"); + + /* synchronize with port task */ + ata_port_flush_task(ap); + + /* synchronize with host_set lock and sort out timeouts */ + + /* For new EH, all qcs are finished in one of three ways - + * normal completion, error completion, and SCSI timeout. + * Both cmpletions can race against SCSI timeout. When normal + * completion wins, the qc never reaches EH. When error + * completion wins, the qc has ATA_QCFLAG_FAILED set. + * + * When SCSI timeout wins, things are a bit more complex. + * Normal or error completion can occur after the timeout but + * before this point. In such cases, both types of + * completions are honored. A scmd is determined to have + * timed out iff its associated qc is active and not failed. + */ + if (ap->ops->error_handler) { + struct scsi_cmnd *scmd, *tmp; + int nr_timedout = 0; + + spin_lock_irqsave(hs_lock, flags); + + list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) { + struct ata_queued_cmd *qc; + + for (i = 0; i < ATA_MAX_QUEUE; i++) { + qc = __ata_qc_from_tag(ap, i); + if (qc->flags & ATA_QCFLAG_ACTIVE && + qc->scsicmd == scmd) + break; + } + + if (i < ATA_MAX_QUEUE) { + /* the scmd has an associated qc */ + if (!(qc->flags & ATA_QCFLAG_FAILED)) { + /* which hasn't failed yet, timeout */ + qc->err_mask |= AC_ERR_TIMEOUT; + qc->flags |= ATA_QCFLAG_FAILED; + nr_timedout++; + } + } else { + /* Normal completion occurred after + * SCSI timeout but before this point. + * Successfully complete it. + */ + scmd->retries = scmd->allowed; + scsi_eh_finish_cmd(scmd, &ap->eh_done_q); + } + } + + /* If we have timed out qcs. They belong to EH from + * this point but the state of the controller is + * unknown. Freeze the port to make sure the IRQ + * handler doesn't diddle with those qcs. This must + * be done atomically w.r.t. setting QCFLAG_FAILED. + */ + if (nr_timedout) + __ata_port_freeze(ap); + + spin_unlock_irqrestore(hs_lock, flags); + } else + spin_unlock_wait(hs_lock); + + repeat: + /* invoke error handler */ + if (ap->ops->error_handler) { + /* fetch & clear EH info */ + spin_lock_irqsave(hs_lock, flags); + + memset(&ap->eh_context, 0, sizeof(ap->eh_context)); + ap->eh_context.i = ap->eh_info; + memset(&ap->eh_info, 0, sizeof(ap->eh_info)); + + ap->flags &= ~ATA_FLAG_EH_PENDING; + + spin_unlock_irqrestore(hs_lock, flags); + + /* invoke EH */ + ap->ops->error_handler(ap); + + /* Exception might have happend after ->error_handler + * recovered the port but before this point. Repeat + * EH in such case. + */ + spin_lock_irqsave(hs_lock, flags); + + if (ap->flags & ATA_FLAG_EH_PENDING) { + if (--repeat_cnt) { + ata_port_printk(ap, KERN_INFO, + "EH pending after completion, " + "repeating EH (cnt=%d)\n", repeat_cnt); + spin_unlock_irqrestore(hs_lock, flags); + goto repeat; + } + ata_port_printk(ap, KERN_ERR, "EH pending after %d " + "tries, giving up\n", ATA_EH_MAX_REPEAT); + } + + /* this run is complete, make sure EH info is clear */ + memset(&ap->eh_info, 0, sizeof(ap->eh_info)); + + /* Clear host_eh_scheduled while holding hs_lock such + * that if exception occurs after this point but + * before EH completion, SCSI midlayer will + * re-initiate EH. + */ + host->host_eh_scheduled = 0; + + spin_unlock_irqrestore(hs_lock, flags); + } else { + WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL); + ap->ops->eng_timeout(ap); + } + + /* finish or retry handled scmd's and clean up */ + WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); + + scsi_eh_flush_done_q(&ap->eh_done_q); + + /* clean up */ + spin_lock_irqsave(hs_lock, flags); + + if (ap->flags & ATA_FLAG_RECOVERED) + ata_port_printk(ap, KERN_INFO, "EH complete\n"); + ap->flags &= ~ATA_FLAG_RECOVERED; + + spin_unlock_irqrestore(hs_lock, flags); + + DPRINTK("EXIT\n"); +} + +/** + * ata_qc_timeout - Handle timeout of queued command + * @qc: Command that timed out + * + * Some part of the kernel (currently, only the SCSI layer) + * has noticed that the active command on port @ap has not + * completed after a specified length of time. Handle this + * condition by disabling DMA (if necessary) and completing + * transactions, with error if necessary. + * + * This also handles the case of the "lost interrupt", where + * for some reason (possibly hardware bug, possibly driver bug) + * an interrupt was not delivered to the driver, even though the + * transaction completed successfully. + * + * TODO: kill this function once old EH is gone. + * + * LOCKING: + * Inherited from SCSI layer (none, can sleep) + */ +static void ata_qc_timeout(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct ata_host_set *host_set = ap->host_set; + u8 host_stat = 0, drv_stat; + unsigned long flags; + + DPRINTK("ENTER\n"); + + ap->hsm_task_state = HSM_ST_IDLE; + + spin_lock_irqsave(&host_set->lock, flags); + + switch (qc->tf.protocol) { + + case ATA_PROT_DMA: + case ATA_PROT_ATAPI_DMA: + host_stat = ap->ops->bmdma_status(ap); + + /* before we do anything else, clear DMA-Start bit */ + ap->ops->bmdma_stop(qc); + + /* fall through */ + + default: + ata_altstatus(ap); + drv_stat = ata_chk_status(ap); + + /* ack bmdma irq events */ + ap->ops->irq_clear(ap); + + ata_dev_printk(qc->dev, KERN_ERR, "command 0x%x timeout, " + "stat 0x%x host_stat 0x%x\n", + qc->tf.command, drv_stat, host_stat); + + /* complete taskfile transaction */ + qc->err_mask |= AC_ERR_TIMEOUT; + break; + } + + spin_unlock_irqrestore(&host_set->lock, flags); + + ata_eh_qc_complete(qc); + + DPRINTK("EXIT\n"); +} + +/** + * ata_eng_timeout - Handle timeout of queued command + * @ap: Port on which timed-out command is active + * + * Some part of the kernel (currently, only the SCSI layer) + * has noticed that the active command on port @ap has not + * completed after a specified length of time. Handle this + * condition by disabling DMA (if necessary) and completing + * transactions, with error if necessary. + * + * This also handles the case of the "lost interrupt", where + * for some reason (possibly hardware bug, possibly driver bug) + * an interrupt was not delivered to the driver, even though the + * transaction completed successfully. + * + * TODO: kill this function once old EH is gone. + * + * LOCKING: + * Inherited from SCSI layer (none, can sleep) + */ +void ata_eng_timeout(struct ata_port *ap) +{ + DPRINTK("ENTER\n"); + + ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag)); + + DPRINTK("EXIT\n"); +} + +/** + * ata_qc_schedule_eh - schedule qc for error handling + * @qc: command to schedule error handling for + * + * Schedule error handling for @qc. EH will kick in as soon as + * other commands are drained. + * + * LOCKING: + * spin_lock_irqsave(host_set lock) + */ +void ata_qc_schedule_eh(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + + WARN_ON(!ap->ops->error_handler); + + qc->flags |= ATA_QCFLAG_FAILED; + qc->ap->flags |= ATA_FLAG_EH_PENDING; + + /* The following will fail if timeout has already expired. + * ata_scsi_error() takes care of such scmds on EH entry. + * Note that ATA_QCFLAG_FAILED is unconditionally set after + * this function completes. + */ + scsi_req_abort_cmd(qc->scsicmd); +} + +/** + * ata_port_schedule_eh - schedule error handling without a qc + * @ap: ATA port to schedule EH for + * + * Schedule error handling for @ap. EH will kick in as soon as + * all commands are drained. + * + * LOCKING: + * spin_lock_irqsave(host_set lock) + */ +void ata_port_schedule_eh(struct ata_port *ap) +{ + WARN_ON(!ap->ops->error_handler); + + ap->flags |= ATA_FLAG_EH_PENDING; + scsi_schedule_eh(ap->host); + + DPRINTK("port EH scheduled\n"); +} + +/** + * ata_port_abort - abort all qc's on the port + * @ap: ATA port to abort qc's for + * + * Abort all active qc's of @ap and schedule EH. + * + * LOCKING: + * spin_lock_irqsave(host_set lock) + * + * RETURNS: + * Number of aborted qc's. + */ +int ata_port_abort(struct ata_port *ap) +{ + int tag, nr_aborted = 0; + + WARN_ON(!ap->ops->error_handler); + + for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { + struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag); + + if (qc) { + qc->flags |= ATA_QCFLAG_FAILED; + ata_qc_complete(qc); + nr_aborted++; + } + } + + if (!nr_aborted) + ata_port_schedule_eh(ap); + + return nr_aborted; +} + +/** + * __ata_port_freeze - freeze port + * @ap: ATA port to freeze + * + * This function is called when HSM violation or some other + * condition disrupts normal operation of the port. Frozen port + * is not allowed to perform any operation until the port is + * thawed, which usually follows a successful reset. + * + * ap->ops->freeze() callback can be used for freezing the port + * hardware-wise (e.g. mask interrupt and stop DMA engine). If a + * port cannot be frozen hardware-wise, the interrupt handler + * must ack and clear interrupts unconditionally while the port + * is frozen. + * + * LOCKING: + * spin_lock_irqsave(host_set lock) + */ +static void __ata_port_freeze(struct ata_port *ap) +{ + WARN_ON(!ap->ops->error_handler); + + if (ap->ops->freeze) + ap->ops->freeze(ap); + + ap->flags |= ATA_FLAG_FROZEN; + + DPRINTK("ata%u port frozen\n", ap->id); +} + +/** + * ata_port_freeze - abort & freeze port + * @ap: ATA port to freeze + * + * Abort and freeze @ap. + * + * LOCKING: + * spin_lock_irqsave(host_set lock) + * + * RETURNS: + * Number of aborted commands. + */ +int ata_port_freeze(struct ata_port *ap) +{ + int nr_aborted; + + WARN_ON(!ap->ops->error_handler); + + nr_aborted = ata_port_abort(ap); + __ata_port_freeze(ap); + + return nr_aborted; +} + +/** + * ata_eh_freeze_port - EH helper to freeze port + * @ap: ATA port to freeze + * + * Freeze @ap. + * + * LOCKING: + * None. + */ +void ata_eh_freeze_port(struct ata_port *ap) +{ + unsigned long flags; + + if (!ap->ops->error_handler) + return; + + spin_lock_irqsave(&ap->host_set->lock, flags); + __ata_port_freeze(ap); + spin_unlock_irqrestore(&ap->host_set->lock, flags); +} + +/** + * ata_port_thaw_port - EH helper to thaw port + * @ap: ATA port to thaw + * + * Thaw frozen port @ap. + * + * LOCKING: + * None. + */ +void ata_eh_thaw_port(struct ata_port *ap) +{ + unsigned long flags; + + if (!ap->ops->error_handler) + return; + + spin_lock_irqsave(&ap->host_set->lock, flags); + + ap->flags &= ~ATA_FLAG_FROZEN; + + if (ap->ops->thaw) + ap->ops->thaw(ap); + + spin_unlock_irqrestore(&ap->host_set->lock, flags); + + DPRINTK("ata%u port thawed\n", ap->id); +} + +static void ata_eh_scsidone(struct scsi_cmnd *scmd) +{ + /* nada */ +} + +static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct scsi_cmnd *scmd = qc->scsicmd; + unsigned long flags; + + spin_lock_irqsave(&ap->host_set->lock, flags); + qc->scsidone = ata_eh_scsidone; + __ata_qc_complete(qc); + WARN_ON(ata_tag_valid(qc->tag)); + spin_unlock_irqrestore(&ap->host_set->lock, flags); + + scsi_eh_finish_cmd(scmd, &ap->eh_done_q); +} + +/** + * ata_eh_qc_complete - Complete an active ATA command from EH + * @qc: Command to complete + * + * Indicate to the mid and upper layers that an ATA command has + * completed. To be used from EH. + */ +void ata_eh_qc_complete(struct ata_queued_cmd *qc) +{ + struct scsi_cmnd *scmd = qc->scsicmd; + scmd->retries = scmd->allowed; + __ata_eh_qc_complete(qc); +} + +/** + * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH + * @qc: Command to retry + * + * Indicate to the mid and upper layers that an ATA command + * should be retried. To be used from EH. + * + * SCSI midlayer limits the number of retries to scmd->allowed. + * scmd->retries is decremented for commands which get retried + * due to unrelated failures (qc->err_mask is zero). + */ +void ata_eh_qc_retry(struct ata_queued_cmd *qc) +{ + struct scsi_cmnd *scmd = qc->scsicmd; + if (!qc->err_mask && scmd->retries) + scmd->retries--; + __ata_eh_qc_complete(qc); +} + +/** + * ata_eh_about_to_do - about to perform eh_action + * @ap: target ATA port + * @action: action about to be performed + * + * Called just before performing EH actions to clear related bits + * in @ap->eh_info such that eh actions are not unnecessarily + * repeated. + * + * LOCKING: + * None. + */ +static void ata_eh_about_to_do(struct ata_port *ap, unsigned int action) +{ + unsigned long flags; + + spin_lock_irqsave(&ap->host_set->lock, flags); + ap->eh_info.action &= ~action; + ap->flags |= ATA_FLAG_RECOVERED; + spin_unlock_irqrestore(&ap->host_set->lock, flags); +} + +/** + * ata_err_string - convert err_mask to descriptive string + * @err_mask: error mask to convert to string + * + * Convert @err_mask to descriptive string. Errors are + * prioritized according to severity and only the most severe + * error is reported. + * + * LOCKING: + * None. + * + * RETURNS: + * Descriptive string for @err_mask + */ +static const char * ata_err_string(unsigned int err_mask) +{ + if (err_mask & AC_ERR_HOST_BUS) + return "host bus error"; + if (err_mask & AC_ERR_ATA_BUS) + return "ATA bus error"; + if (err_mask & AC_ERR_TIMEOUT) + return "timeout"; + if (err_mask & AC_ERR_HSM) + return "HSM violation"; + if (err_mask & AC_ERR_SYSTEM) + return "internal error"; + if (err_mask & AC_ERR_MEDIA) + return "media error"; + if (err_mask & AC_ERR_INVALID) + return "invalid argument"; + if (err_mask & AC_ERR_DEV) + return "device error"; + return "unknown error"; +} + +/** + * ata_read_log_page - read a specific log page + * @dev: target device + * @page: page to read + * @buf: buffer to store read page + * @sectors: number of sectors to read + * + * Read log page using READ_LOG_EXT command. + * + * LOCKING: + * Kernel thread context (may sleep). + * + * RETURNS: + * 0 on success, AC_ERR_* mask otherwise. + */ +static unsigned int ata_read_log_page(struct ata_device *dev, + u8 page, void *buf, unsigned int sectors) +{ + struct ata_taskfile tf; + unsigned int err_mask; + + DPRINTK("read log page - page %d\n", page); + + ata_tf_init(dev, &tf); + tf.command = ATA_CMD_READ_LOG_EXT; + tf.lbal = page; + tf.nsect = sectors; + tf.hob_nsect = sectors >> 8; + tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; + tf.protocol = ATA_PROT_PIO; + + err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, + buf, sectors * ATA_SECT_SIZE); + + DPRINTK("EXIT, err_mask=%x\n", err_mask); + return err_mask; +} + +/** + * ata_eh_read_log_10h - Read log page 10h for NCQ error details + * @dev: Device to read log page 10h from + * @tag: Resulting tag of the failed command + * @tf: Resulting taskfile registers of the failed command + * + * Read log page 10h to obtain NCQ error details and clear error + * condition. + * + * LOCKING: + * Kernel thread context (may sleep). + * + * RETURNS: + * 0 on success, -errno otherwise. + */ +static int ata_eh_read_log_10h(struct ata_device *dev, + int *tag, struct ata_taskfile *tf) +{ + u8 *buf = dev->ap->sector_buf; + unsigned int err_mask; + u8 csum; + int i; + + err_mask = ata_read_log_page(dev, ATA_LOG_SATA_NCQ, buf, 1); + if (err_mask) + return -EIO; + + csum = 0; + for (i = 0; i < ATA_SECT_SIZE; i++) + csum += buf[i]; + if (csum) + ata_dev_printk(dev, KERN_WARNING, + "invalid checksum 0x%x on log page 10h\n", csum); + + if (buf[0] & 0x80) + return -ENOENT; + + *tag = buf[0] & 0x1f; + + tf->command = buf[2]; + tf->feature = buf[3]; + tf->lbal = buf[4]; + tf->lbam = buf[5]; + tf->lbah = buf[6]; + tf->device = buf[7]; + tf->hob_lbal = buf[8]; + tf->hob_lbam = buf[9]; + tf->hob_lbah = buf[10]; + tf->nsect = buf[12]; + tf->hob_nsect = buf[13]; + + return 0; +} + +/** + * atapi_eh_request_sense - perform ATAPI REQUEST_SENSE + * @dev: device to perform REQUEST_SENSE to + * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long) + * + * Perform ATAPI REQUEST_SENSE after the device reported CHECK + * SENSE. This function is EH helper. + * + * LOCKING: + * Kernel thread context (may sleep). + * + * RETURNS: + * 0 on success, AC_ERR_* mask on failure + */ +static unsigned int atapi_eh_request_sense(struct ata_device *dev, + unsigned char *sense_buf) +{ + struct ata_port *ap = dev->ap; + struct ata_taskfile tf; + u8 cdb[ATAPI_CDB_LEN]; + + DPRINTK("ATAPI request sense\n"); + + ata_tf_init(dev, &tf); + + /* FIXME: is this needed? */ + memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE); + + /* XXX: why tf_read here? */ + ap->ops->tf_read(ap, &tf); + + /* fill these in, for the case where they are -not- overwritten */ + sense_buf[0] = 0x70; + sense_buf[2] = tf.feature >> 4; + + memset(cdb, 0, ATAPI_CDB_LEN); + cdb[0] = REQUEST_SENSE; + cdb[4] = SCSI_SENSE_BUFFERSIZE; + + tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + tf.command = ATA_CMD_PACKET; + + /* is it pointless to prefer PIO for "safety reasons"? */ + if (ap->flags & ATA_FLAG_PIO_DMA) { + tf.protocol = ATA_PROT_ATAPI_DMA; + tf.feature |= ATAPI_PKT_DMA; + } else { + tf.protocol = ATA_PROT_ATAPI; + tf.lbam = (8 * 1024) & 0xff; + tf.lbah = (8 * 1024) >> 8; + } + + return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE, + sense_buf, SCSI_SENSE_BUFFERSIZE); +} + +/** + * ata_eh_analyze_serror - analyze SError for a failed port + * @ap: ATA port to analyze SError for + * + * Analyze SError if available and further determine cause of + * failure. + * + * LOCKING: + * None. + */ +static void ata_eh_analyze_serror(struct ata_port *ap) +{ + struct ata_eh_context *ehc = &ap->eh_context; + u32 serror = ehc->i.serror; + unsigned int err_mask = 0, action = 0; + + if (serror & SERR_PERSISTENT) { + err_mask |= AC_ERR_ATA_BUS; + action |= ATA_EH_HARDRESET; + } + if (serror & + (SERR_DATA_RECOVERED | SERR_COMM_RECOVERED | SERR_DATA)) { + err_mask |= AC_ERR_ATA_BUS; + action |= ATA_EH_SOFTRESET; + } + if (serror & SERR_PROTOCOL) { + err_mask |= AC_ERR_HSM; + action |= ATA_EH_SOFTRESET; + } + if (serror & SERR_INTERNAL) { + err_mask |= AC_ERR_SYSTEM; + action |= ATA_EH_SOFTRESET; + } + if (serror & (SERR_PHYRDY_CHG | SERR_DEV_XCHG)) { + err_mask |= AC_ERR_ATA_BUS; + action |= ATA_EH_HARDRESET; + } + + ehc->i.err_mask |= err_mask; + ehc->i.action |= action; +} + +/** + * ata_eh_analyze_ncq_error - analyze NCQ error + * @ap: ATA port to analyze NCQ error for + * + * Read log page 10h, determine the offending qc and acquire + * error status TF. For NCQ device errors, all LLDDs have to do + * is setting AC_ERR_DEV in ehi->err_mask. This function takes + * care of the rest. + * + * LOCKING: + * Kernel thread context (may sleep). + */ +static void ata_eh_analyze_ncq_error(struct ata_port *ap) +{ + struct ata_eh_context *ehc = &ap->eh_context; + struct ata_device *dev = ap->device; + struct ata_queued_cmd *qc; + struct ata_taskfile tf; + int tag, rc; + + /* if frozen, we can't do much */ + if (ap->flags & ATA_FLAG_FROZEN) + return; + + /* is it NCQ device error? */ + if (!ap->sactive || !(ehc->i.err_mask & AC_ERR_DEV)) + return; + + /* has LLDD analyzed already? */ + for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { + qc = __ata_qc_from_tag(ap, tag); + + if (!(qc->flags & ATA_QCFLAG_FAILED)) + continue; + + if (qc->err_mask) + return; + } + + /* okay, this error is ours */ + rc = ata_eh_read_log_10h(dev, &tag, &tf); + if (rc) { + ata_port_printk(ap, KERN_ERR, "failed to read log page 10h " + "(errno=%d)\n", rc); + return; + } + + if (!(ap->sactive & (1 << tag))) { + ata_port_printk(ap, KERN_ERR, "log page 10h reported " + "inactive tag %d\n", tag); + return; + } + + /* we've got the perpetrator, condemn it */ + qc = __ata_qc_from_tag(ap, tag); + memcpy(&qc->result_tf, &tf, sizeof(tf)); + qc->err_mask |= AC_ERR_DEV; + ehc->i.err_mask &= ~AC_ERR_DEV; +} + +/** + * ata_eh_analyze_tf - analyze taskfile of a failed qc + * @qc: qc to analyze + * @tf: Taskfile registers to analyze + * + * Analyze taskfile of @qc and further determine cause of + * failure. This function also requests ATAPI sense data if + * avaliable. + * + * LOCKING: + * Kernel thread context (may sleep). + * + * RETURNS: + * Determined recovery action + */ +static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc, + const struct ata_taskfile *tf) +{ + unsigned int tmp, action = 0; + u8 stat = tf->command, err = tf->feature; + + if ((stat & (ATA_BUSY | ATA_DRQ | ATA_DRDY)) != ATA_DRDY) { + qc->err_mask |= AC_ERR_HSM; + return ATA_EH_SOFTRESET; + } + + if (!(qc->err_mask & AC_ERR_DEV)) + return 0; + + switch (qc->dev->class) { + case ATA_DEV_ATA: + if (err & ATA_ICRC) + qc->err_mask |= AC_ERR_ATA_BUS; + if (err & ATA_UNC) + qc->err_mask |= AC_ERR_MEDIA; + if (err & ATA_IDNF) + qc->err_mask |= AC_ERR_INVALID; + break; + + case ATA_DEV_ATAPI: + tmp = atapi_eh_request_sense(qc->dev, + qc->scsicmd->sense_buffer); + if (!tmp) { + /* ATA_QCFLAG_SENSE_VALID is used to tell + * atapi_qc_complete() that sense data is + * already valid. + * + * TODO: interpret sense data and set + * appropriate err_mask. + */ + qc->flags |= ATA_QCFLAG_SENSE_VALID; + } else + qc->err_mask |= tmp; + } + + if (qc->err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT | AC_ERR_ATA_BUS)) + action |= ATA_EH_SOFTRESET; + + return action; +} + +static int ata_eh_categorize_ering_entry(struct ata_ering_entry *ent) +{ + if (ent->err_mask & (AC_ERR_ATA_BUS | AC_ERR_TIMEOUT)) + return 1; + + if (ent->is_io) { + if (ent->err_mask & AC_ERR_HSM) + return 1; + if ((ent->err_mask & + (AC_ERR_DEV|AC_ERR_MEDIA|AC_ERR_INVALID)) == AC_ERR_DEV) + return 2; + } + + return 0; +} + +struct speed_down_needed_arg { + u64 since; + int nr_errors[3]; +}; + +static int speed_down_needed_cb(struct ata_ering_entry *ent, void *void_arg) +{ + struct speed_down_needed_arg *arg = void_arg; + + if (ent->timestamp < arg->since) + return -1; + + arg->nr_errors[ata_eh_categorize_ering_entry(ent)]++; + return 0; +} + +/** + * ata_eh_speed_down_needed - Determine wheter speed down is necessary + * @dev: Device of interest + * + * This function examines error ring of @dev and determines + * whether speed down is necessary. Speed down is necessary if + * there have been more than 3 of Cat-1 errors or 10 of Cat-2 + * errors during last 15 minutes. + * + * Cat-1 errors are ATA_BUS, TIMEOUT for any command and HSM + * violation for known supported commands. + * + * Cat-2 errors are unclassified DEV error for known supported + * command. + * + * LOCKING: + * Inherited from caller. + * + * RETURNS: + * 1 if speed down is necessary, 0 otherwise + */ +static int ata_eh_speed_down_needed(struct ata_device *dev) +{ + const u64 interval = 15LLU * 60 * HZ; + static const int err_limits[3] = { -1, 3, 10 }; + struct speed_down_needed_arg arg; + struct ata_ering_entry *ent; + int err_cat; + u64 j64; + + ent = ata_ering_top(&dev->ering); + if (!ent) + return 0; + + err_cat = ata_eh_categorize_ering_entry(ent); + if (err_cat == 0) + return 0; + + memset(&arg, 0, sizeof(arg)); + + j64 = get_jiffies_64(); + if (j64 >= interval) + arg.since = j64 - interval; + else + arg.since = 0; + + ata_ering_map(&dev->ering, speed_down_needed_cb, &arg); + + return arg.nr_errors[err_cat] > err_limits[err_cat]; +} + +/** + * ata_eh_speed_down - record error and speed down if necessary + * @dev: Failed device + * @is_io: Did the device fail during normal IO? + * @err_mask: err_mask of the error + * + * Record error and examine error history to determine whether + * adjusting transmission speed is necessary. It also sets + * transmission limits appropriately if such adjustment is + * necessary. + * + * LOCKING: + * Kernel thread context (may sleep). + * + * RETURNS: + * 0 on success, -errno otherwise + */ +static int ata_eh_speed_down(struct ata_device *dev, int is_io, + unsigned int err_mask) +{ + if (!err_mask) + return 0; + + /* record error and determine whether speed down is necessary */ + ata_ering_record(&dev->ering, is_io, err_mask); + + if (!ata_eh_speed_down_needed(dev)) + return 0; + + /* speed down SATA link speed if possible */ + if (sata_down_spd_limit(dev->ap) == 0) + return ATA_EH_HARDRESET; + + /* lower transfer mode */ + if (ata_down_xfermask_limit(dev, 0) == 0) + return ATA_EH_SOFTRESET; + + ata_dev_printk(dev, KERN_ERR, + "speed down requested but no transfer mode left\n"); + return 0; +} + +/** + * ata_eh_autopsy - analyze error and determine recovery action + * @ap: ATA port to perform autopsy on + * + * Analyze why @ap failed and determine which recovery action is + * needed. This function also sets more detailed AC_ERR_* values + * and fills sense data for ATAPI CHECK SENSE. + * + * LOCKING: + * Kernel thread context (may sleep). + */ +static void ata_eh_autopsy(struct ata_port *ap) +{ + struct ata_eh_context *ehc = &ap->eh_context; + unsigned int action = ehc->i.action; + struct ata_device *failed_dev = NULL; + unsigned int all_err_mask = 0; + int tag, is_io = 0; + u32 serror; + int rc; + + DPRINTK("ENTER\n"); + + /* obtain and analyze SError */ + rc = sata_scr_read(ap, SCR_ERROR, &serror); + if (rc == 0) { + ehc->i.serror |= serror; + ata_eh_analyze_serror(ap); + } else if (rc != -EOPNOTSUPP) + action |= ATA_EH_HARDRESET; + + /* analyze NCQ failure */ + ata_eh_analyze_ncq_error(ap); + + /* any real error trumps AC_ERR_OTHER */ + if (ehc->i.err_mask & ~AC_ERR_OTHER) + ehc->i.err_mask &= ~AC_ERR_OTHER; + + all_err_mask |= ehc->i.err_mask; + + for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { + struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); + + if (!(qc->flags & ATA_QCFLAG_FAILED)) + continue; + + /* inherit upper level err_mask */ + qc->err_mask |= ehc->i.err_mask; + + /* analyze TF */ + action |= ata_eh_analyze_tf(qc, &qc->result_tf); + + /* DEV errors are probably spurious in case of ATA_BUS error */ + if (qc->err_mask & AC_ERR_ATA_BUS) + qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_MEDIA | + AC_ERR_INVALID); + + /* any real error trumps unknown error */ + if (qc->err_mask & ~AC_ERR_OTHER) + qc->err_mask &= ~AC_ERR_OTHER; + + /* SENSE_VALID trumps dev/unknown error and revalidation */ + if (qc->flags & ATA_QCFLAG_SENSE_VALID) { + qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER); + action &= ~ATA_EH_REVALIDATE; + } + + /* accumulate error info */ + failed_dev = qc->dev; + all_err_mask |= qc->err_mask; + if (qc->flags & ATA_QCFLAG_IO) + is_io = 1; + } + + /* speed down iff command was in progress */ + if (failed_dev) + action |= ata_eh_speed_down(failed_dev, is_io, all_err_mask); + + /* enforce default EH actions */ + if (ap->flags & ATA_FLAG_FROZEN || + all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT)) + action |= ATA_EH_SOFTRESET; + else if (all_err_mask) + action |= ATA_EH_REVALIDATE; + + /* record autopsy result */ + ehc->i.dev = failed_dev; + ehc->i.action = action; + + DPRINTK("EXIT\n"); +} + +/** + * ata_eh_report - report error handling to user + * @ap: ATA port EH is going on + * + * Report EH to user. + * + * LOCKING: + * None. + */ +static void ata_eh_report(struct ata_port *ap) +{ + struct ata_eh_context *ehc = &ap->eh_context; + const char *frozen, *desc; + int tag, nr_failed = 0; + + desc = NULL; + if (ehc->i.desc[0] != '\0') + desc = ehc->i.desc; + + for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { + struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); + + if (!(qc->flags & ATA_QCFLAG_FAILED)) + continue; + if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask) + continue; + + nr_failed++; + } + + if (!nr_failed && !ehc->i.err_mask) + return; + + frozen = ""; + if (ap->flags & ATA_FLAG_FROZEN) + frozen = " frozen"; + + if (ehc->i.dev) { + ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x " + "SAct 0x%x SErr 0x%x action 0x%x%s\n", + ehc->i.err_mask, ap->sactive, ehc->i.serror, + ehc->i.action, frozen); + if (desc) + ata_dev_printk(ehc->i.dev, KERN_ERR, "(%s)\n", desc); + } else { + ata_port_printk(ap, KERN_ERR, "exception Emask 0x%x " + "SAct 0x%x SErr 0x%x action 0x%x%s\n", + ehc->i.err_mask, ap->sactive, ehc->i.serror, + ehc->i.action, frozen); + if (desc) + ata_port_printk(ap, KERN_ERR, "(%s)\n", desc); + } + + for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { + struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); + + if (!(qc->flags & ATA_QCFLAG_FAILED) || !qc->err_mask) + continue; + + ata_dev_printk(qc->dev, KERN_ERR, "tag %d cmd 0x%x " + "Emask 0x%x stat 0x%x err 0x%x (%s)\n", + qc->tag, qc->tf.command, qc->err_mask, + qc->result_tf.command, qc->result_tf.feature, + ata_err_string(qc->err_mask)); + } +} + +static int ata_eh_reset(struct ata_port *ap, ata_reset_fn_t softreset, + ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) +{ + struct ata_eh_context *ehc = &ap->eh_context; + unsigned int classes[ATA_MAX_DEVICES]; + int tries = ATA_EH_RESET_TRIES; + ata_reset_fn_t reset; + int rc; + + if (softreset && (!hardreset || (!sata_set_spd_needed(ap) && + !(ehc->i.action & ATA_EH_HARDRESET)))) + reset = softreset; + else + reset = hardreset; + + retry: + ata_port_printk(ap, KERN_INFO, "%s resetting port\n", + reset == softreset ? "soft" : "hard"); + + /* reset */ + ata_eh_about_to_do(ap, ATA_EH_RESET_MASK); + ehc->i.flags |= ATA_EHI_DID_RESET; + + rc = ata_do_reset(ap, reset, classes); + + if (rc && --tries) { + ata_port_printk(ap, KERN_WARNING, + "%sreset failed, retrying in 5 secs\n", + reset == softreset ? "soft" : "hard"); + ssleep(5); + + if (reset == hardreset) + sata_down_spd_limit(ap); + if (hardreset) + reset = hardreset; + goto retry; + } + + if (rc == 0) { + if (postreset) + postreset(ap, classes); + + /* reset successful, schedule revalidation */ + ehc->i.dev = NULL; + ehc->i.action &= ~ATA_EH_RESET_MASK; + ehc->i.action |= ATA_EH_REVALIDATE; + } + + return rc; +} + +static int ata_eh_revalidate(struct ata_port *ap, + struct ata_device **r_failed_dev) +{ + struct ata_eh_context *ehc = &ap->eh_context; + struct ata_device *dev; + int i, rc = 0; + + DPRINTK("ENTER\n"); + + for (i = 0; i < ATA_MAX_DEVICES; i++) { + dev = &ap->device[i]; + + if (ehc->i.action & ATA_EH_REVALIDATE && ata_dev_enabled(dev) && + (!ehc->i.dev || ehc->i.dev == dev)) { + if (ata_port_offline(ap)) { + rc = -EIO; + break; + } + + ata_eh_about_to_do(ap, ATA_EH_REVALIDATE); + rc = ata_dev_revalidate(dev, + ehc->i.flags & ATA_EHI_DID_RESET); + if (rc) + break; + + ehc->i.action &= ~ATA_EH_REVALIDATE; + } + } + + if (rc) + *r_failed_dev = dev; + + DPRINTK("EXIT\n"); + return rc; +} + +static int ata_port_nr_enabled(struct ata_port *ap) +{ + int i, cnt = 0; + + for (i = 0; i < ATA_MAX_DEVICES; i++) + if (ata_dev_enabled(&ap->device[i])) + cnt++; + return cnt; +} + +/** + * ata_eh_recover - recover host port after error + * @ap: host port to recover + * @softreset: softreset method (can be NULL) + * @hardreset: hardreset method (can be NULL) + * @postreset: postreset method (can be NULL) + * + * This is the alpha and omega, eum and yang, heart and soul of + * libata exception handling. On entry, actions required to + * recover each devices are recorded in eh_context. This + * function executes all the operations with appropriate retrials + * and fallbacks to resurrect failed devices. + * + * LOCKING: + * Kernel thread context (may sleep). + * + * RETURNS: + * 0 on success, -errno on failure. + */ +static int ata_eh_recover(struct ata_port *ap, ata_reset_fn_t softreset, + ata_reset_fn_t hardreset, + ata_postreset_fn_t postreset) +{ + struct ata_eh_context *ehc = &ap->eh_context; + struct ata_device *dev; + int down_xfermask, i, rc; + + DPRINTK("ENTER\n"); + + /* prep for recovery */ + for (i = 0; i < ATA_MAX_DEVICES; i++) { + dev = &ap->device[i]; + + ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; + } + + retry: + down_xfermask = 0; + rc = 0; + + /* skip EH if possible. */ + if (!ata_port_nr_enabled(ap) && !(ap->flags & ATA_FLAG_FROZEN)) + ehc->i.action = 0; + + /* reset */ + if (ehc->i.action & ATA_EH_RESET_MASK) { + ata_eh_freeze_port(ap); + + rc = ata_eh_reset(ap, softreset, hardreset, postreset); + if (rc) { + ata_port_printk(ap, KERN_ERR, + "reset failed, giving up\n"); + goto out; + } + + ata_eh_thaw_port(ap); + } + + /* revalidate existing devices */ + rc = ata_eh_revalidate(ap, &dev); + if (rc) + goto dev_fail; + + /* configure transfer mode if the port has been reset */ + if (ehc->i.flags & ATA_EHI_DID_RESET) { + rc = ata_set_mode(ap, &dev); + if (rc) { + down_xfermask = 1; + goto dev_fail; + } + } + + goto out; + + dev_fail: + switch (rc) { + case -ENODEV: + case -EINVAL: + ehc->tries[dev->devno] = 0; + break; + case -EIO: + sata_down_spd_limit(ap); + default: + ehc->tries[dev->devno]--; + if (down_xfermask && + ata_down_xfermask_limit(dev, ehc->tries[dev->devno] == 1)) + ehc->tries[dev->devno] = 0; + } + + /* disable device if it has used up all its chances */ + if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) + ata_dev_disable(dev); + + /* soft didn't work? be haaaaard */ + if (ehc->i.flags & ATA_EHI_DID_RESET) + ehc->i.action |= ATA_EH_HARDRESET; + else + ehc->i.action |= ATA_EH_SOFTRESET; + + if (ata_port_nr_enabled(ap)) { + ata_port_printk(ap, KERN_WARNING, "failed to recover some " + "devices, retrying in 5 secs\n"); + ssleep(5); + } else { + /* no device left, repeat fast */ + msleep(500); + } + + goto retry; + + out: + if (rc) { + for (i = 0; i < ATA_MAX_DEVICES; i++) + ata_dev_disable(&ap->device[i]); + } + + DPRINTK("EXIT, rc=%d\n", rc); + return rc; +} + +/** + * ata_eh_finish - finish up EH + * @ap: host port to finish EH for + * + * Recovery is complete. Clean up EH states and retry or finish + * failed qcs. + * + * LOCKING: + * None. + */ +static void ata_eh_finish(struct ata_port *ap) +{ + int tag; + + /* retry or finish qcs */ + for (tag = 0; tag < ATA_MAX_QUEUE; tag++) { + struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); + + if (!(qc->flags & ATA_QCFLAG_FAILED)) + continue; + + if (qc->err_mask) { + /* FIXME: Once EH migration is complete, + * generate sense data in this function, + * considering both err_mask and tf. + */ + if (qc->err_mask & AC_ERR_INVALID) + ata_eh_qc_complete(qc); + else + ata_eh_qc_retry(qc); + } else { + if (qc->flags & ATA_QCFLAG_SENSE_VALID) { + ata_eh_qc_complete(qc); + } else { + /* feed zero TF to sense generation */ + memset(&qc->result_tf, 0, sizeof(qc->result_tf)); + ata_eh_qc_retry(qc); + } + } + } +} + +/** + * ata_do_eh - do standard error handling + * @ap: host port to handle error for + * @softreset: softreset method (can be NULL) + * @hardreset: hardreset method (can be NULL) + * @postreset: postreset method (can be NULL) + * + * Perform standard error handling sequence. + * + * LOCKING: + * Kernel thread context (may sleep). + */ +void ata_do_eh(struct ata_port *ap, ata_reset_fn_t softreset, + ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) +{ + ata_eh_autopsy(ap); + ata_eh_report(ap); + ata_eh_recover(ap, softreset, hardreset, postreset); + ata_eh_finish(ap); +} diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index a0289ec3e283b..2007b4b6e1b4b 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -41,6 +41,7 @@ #include <scsi/scsi_eh.h> #include <scsi/scsi_device.h> #include <scsi/scsi_request.h> +#include <scsi/scsi_tcq.h> #include <scsi/scsi_transport.h> #include <linux/libata.h> #include <linux/hdreg.h> @@ -53,8 +54,6 @@ typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd); static struct ata_device * ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev); -static void ata_scsi_error(struct Scsi_Host *host); -enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd); #define RW_RECOVERY_MPAGE 0x1 #define RW_RECOVERY_MPAGE_LEN 12 @@ -304,7 +303,6 @@ int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) /** * ata_scsi_qc_new - acquire new ata_queued_cmd reference - * @ap: ATA port to which the new command is attached * @dev: ATA device to which the new command is attached * @cmd: SCSI command that originated this ATA command * @done: SCSI command completion function @@ -323,14 +321,13 @@ int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) * RETURNS: * Command allocated, or %NULL if none available. */ -struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap, - struct ata_device *dev, +struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) { struct ata_queued_cmd *qc; - qc = ata_qc_new_init(ap, dev); + qc = ata_qc_new_init(dev); if (qc) { qc->scsicmd = cmd; qc->scsidone = done; @@ -397,18 +394,18 @@ void ata_dump_status(unsigned id, struct ata_taskfile *tf) int ata_scsi_device_resume(struct scsi_device *sdev) { - struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0]; + struct ata_port *ap = ata_shost_to_port(sdev->host); struct ata_device *dev = &ap->device[sdev->id]; - return ata_device_resume(ap, dev); + return ata_device_resume(dev); } int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state) { - struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0]; + struct ata_port *ap = ata_shost_to_port(sdev->host); struct ata_device *dev = &ap->device[sdev->id]; - return ata_device_suspend(ap, dev, state); + return ata_device_suspend(dev, state); } /** @@ -419,6 +416,7 @@ int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state) * @sk: the sense key we'll fill out * @asc: the additional sense code we'll fill out * @ascq: the additional sense code qualifier we'll fill out + * @verbose: be verbose * * Converts an ATA error into a SCSI error. Fill out pointers to * SK, ASC, and ASCQ bytes for later use in fixed or descriptor @@ -428,7 +426,7 @@ int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state) * spin_lock_irqsave(host_set lock) */ void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, - u8 *ascq) + u8 *ascq, int verbose) { int i; @@ -493,8 +491,9 @@ void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, } } /* No immediate match */ - printk(KERN_WARNING "ata%u: no sense translation for " - "error 0x%02x\n", id, drv_err); + if (verbose) + printk(KERN_WARNING "ata%u: no sense translation for " + "error 0x%02x\n", id, drv_err); } /* Fall back to interpreting status bits */ @@ -507,8 +506,9 @@ void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, } } /* No error? Undecoded? */ - printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n", - id, drv_stat); + if (verbose) + printk(KERN_WARNING "ata%u: no sense translation for " + "status: 0x%02x\n", id, drv_stat); /* We need a sensible error return here, which is tricky, and one that won't cause people to do things like return a disk wrongly */ @@ -517,9 +517,10 @@ void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, *ascq = 0x00; translate_done: - printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to " - "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err, - *sk, *asc, *ascq); + if (verbose) + printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " + "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", + id, drv_stat, drv_err, *sk, *asc, *ascq); return; } @@ -539,27 +540,23 @@ void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) { struct scsi_cmnd *cmd = qc->scsicmd; - struct ata_taskfile *tf = &qc->tf; + struct ata_taskfile *tf = &qc->result_tf; unsigned char *sb = cmd->sense_buffer; unsigned char *desc = sb + 8; + int verbose = qc->ap->ops->error_handler == NULL; memset(sb, 0, SCSI_SENSE_BUFFERSIZE); cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; /* - * Read the controller registers. - */ - WARN_ON(qc->ap->ops->tf_read == NULL); - qc->ap->ops->tf_read(qc->ap, tf); - - /* * Use ata_to_sense_error() to map status register bits * onto sense key, asc & ascq. */ - if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { + if (qc->err_mask || + tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { ata_to_sense_error(qc->ap->id, tf->command, tf->feature, - &sb[1], &sb[2], &sb[3]); + &sb[1], &sb[2], &sb[3], verbose); sb[1] &= 0x0f; } @@ -615,26 +612,22 @@ void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) void ata_gen_fixed_sense(struct ata_queued_cmd *qc) { struct scsi_cmnd *cmd = qc->scsicmd; - struct ata_taskfile *tf = &qc->tf; + struct ata_taskfile *tf = &qc->result_tf; unsigned char *sb = cmd->sense_buffer; + int verbose = qc->ap->ops->error_handler == NULL; memset(sb, 0, SCSI_SENSE_BUFFERSIZE); cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; /* - * Read the controller registers. - */ - WARN_ON(qc->ap->ops->tf_read == NULL); - qc->ap->ops->tf_read(qc->ap, tf); - - /* * Use ata_to_sense_error() to map status register bits * onto sense key, asc & ascq. */ - if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { + if (qc->err_mask || + tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { ata_to_sense_error(qc->ap->id, tf->command, tf->feature, - &sb[2], &sb[12], &sb[13]); + &sb[2], &sb[12], &sb[13], verbose); sb[2] &= 0x0f; } @@ -677,7 +670,7 @@ static void ata_scsi_dev_config(struct scsi_device *sdev, */ max_sectors = ATA_MAX_SECTORS; if (dev->flags & ATA_DFLAG_LBA48) - max_sectors = 2048; + max_sectors = ATA_MAX_SECTORS_LBA48; if (dev->max_sectors) max_sectors = dev->max_sectors; @@ -692,6 +685,14 @@ static void ata_scsi_dev_config(struct scsi_device *sdev, request_queue_t *q = sdev->request_queue; blk_queue_max_hw_segments(q, q->max_hw_segments - 1); } + + if (dev->flags & ATA_DFLAG_NCQ) { + int depth; + + depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); + depth = min(ATA_MAX_QUEUE - 1, depth); + scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); + } } /** @@ -716,7 +717,7 @@ int ata_scsi_slave_config(struct scsi_device *sdev) struct ata_port *ap; struct ata_device *dev; - ap = (struct ata_port *) &sdev->host->hostdata[0]; + ap = ata_shost_to_port(sdev->host); dev = &ap->device[sdev->id]; ata_scsi_dev_config(sdev, dev); @@ -726,134 +727,40 @@ int ata_scsi_slave_config(struct scsi_device *sdev) } /** - * ata_scsi_timed_out - SCSI layer time out callback - * @cmd: timed out SCSI command + * ata_scsi_change_queue_depth - SCSI callback for queue depth config + * @sdev: SCSI device to configure queue depth for + * @queue_depth: new queue depth * - * Handles SCSI layer timeout. We race with normal completion of - * the qc for @cmd. If the qc is already gone, we lose and let - * the scsi command finish (EH_HANDLED). Otherwise, the qc has - * timed out and EH should be invoked. Prevent ata_qc_complete() - * from finishing it by setting EH_SCHEDULED and return - * EH_NOT_HANDLED. + * This is libata standard hostt->change_queue_depth callback. + * SCSI will call into this callback when user tries to set queue + * depth via sysfs. * * LOCKING: - * Called from timer context + * SCSI layer (we don't care) * * RETURNS: - * EH_HANDLED or EH_NOT_HANDLED - */ -enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) -{ - struct Scsi_Host *host = cmd->device->host; - struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; - unsigned long flags; - struct ata_queued_cmd *qc; - enum scsi_eh_timer_return ret = EH_HANDLED; - - DPRINTK("ENTER\n"); - - spin_lock_irqsave(&ap->host_set->lock, flags); - qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc) { - WARN_ON(qc->scsicmd != cmd); - qc->flags |= ATA_QCFLAG_EH_SCHEDULED; - qc->err_mask |= AC_ERR_TIMEOUT; - ret = EH_NOT_HANDLED; - } - spin_unlock_irqrestore(&ap->host_set->lock, flags); - - DPRINTK("EXIT, ret=%d\n", ret); - return ret; -} - -/** - * ata_scsi_error - SCSI layer error handler callback - * @host: SCSI host on which error occurred - * - * Handles SCSI-layer-thrown error events. - * - * LOCKING: - * Inherited from SCSI layer (none, can sleep) + * Newly configured queue depth. */ - -static void ata_scsi_error(struct Scsi_Host *host) -{ - struct ata_port *ap; - unsigned long flags; - - DPRINTK("ENTER\n"); - - ap = (struct ata_port *) &host->hostdata[0]; - - spin_lock_irqsave(&ap->host_set->lock, flags); - WARN_ON(ap->flags & ATA_FLAG_IN_EH); - ap->flags |= ATA_FLAG_IN_EH; - WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL); - spin_unlock_irqrestore(&ap->host_set->lock, flags); - - ata_port_flush_task(ap); - - ap->ops->eng_timeout(ap); - - WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); - - scsi_eh_flush_done_q(&ap->eh_done_q); - - spin_lock_irqsave(&ap->host_set->lock, flags); - ap->flags &= ~ATA_FLAG_IN_EH; - spin_unlock_irqrestore(&ap->host_set->lock, flags); - - DPRINTK("EXIT\n"); -} - -static void ata_eh_scsidone(struct scsi_cmnd *scmd) +int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) { - /* nada */ -} - -static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) -{ - struct ata_port *ap = qc->ap; - struct scsi_cmnd *scmd = qc->scsicmd; - unsigned long flags; + struct ata_port *ap = ata_shost_to_port(sdev->host); + struct ata_device *dev; + int max_depth; - spin_lock_irqsave(&ap->host_set->lock, flags); - qc->scsidone = ata_eh_scsidone; - __ata_qc_complete(qc); - WARN_ON(ata_tag_valid(qc->tag)); - spin_unlock_irqrestore(&ap->host_set->lock, flags); + if (queue_depth < 1) + return sdev->queue_depth; - scsi_eh_finish_cmd(scmd, &ap->eh_done_q); -} + dev = ata_scsi_find_dev(ap, sdev); + if (!dev || !ata_dev_enabled(dev)) + return sdev->queue_depth; -/** - * ata_eh_qc_complete - Complete an active ATA command from EH - * @qc: Command to complete - * - * Indicate to the mid and upper layers that an ATA command has - * completed. To be used from EH. - */ -void ata_eh_qc_complete(struct ata_queued_cmd *qc) -{ - struct scsi_cmnd *scmd = qc->scsicmd; - scmd->retries = scmd->allowed; - __ata_eh_qc_complete(qc); -} + max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); + max_depth = min(ATA_MAX_QUEUE - 1, max_depth); + if (queue_depth > max_depth) + queue_depth = max_depth; -/** - * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH - * @qc: Command to retry - * - * Indicate to the mid and upper layers that an ATA command - * should be retried. To be used from EH. - * - * SCSI midlayer limits the number of retries to scmd->allowed. - * This function might need to adjust scmd->retries for commands - * which get retried due to unrelated NCQ failures. - */ -void ata_eh_qc_retry(struct ata_queued_cmd *qc) -{ - __ata_eh_qc_complete(qc); + scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); + return queue_depth; } /** @@ -891,7 +798,7 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, tf->nsect = 1; /* 1 sector, lba=0 */ if (qc->dev->flags & ATA_DFLAG_LBA) { - qc->tf.flags |= ATA_TFLAG_LBA; + tf->flags |= ATA_TFLAG_LBA; tf->lbah = 0x0; tf->lbam = 0x0; @@ -1195,6 +1102,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm u64 block; u32 n_block; + qc->flags |= ATA_QCFLAG_IO; tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 || @@ -1241,7 +1149,36 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm */ goto nothing_to_do; - if (dev->flags & ATA_DFLAG_LBA) { + if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) { + /* yay, NCQ */ + if (!lba_48_ok(block, n_block)) + goto out_of_range; + + tf->protocol = ATA_PROT_NCQ; + tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; + + if (tf->flags & ATA_TFLAG_WRITE) + tf->command = ATA_CMD_FPDMA_WRITE; + else + tf->command = ATA_CMD_FPDMA_READ; + + qc->nsect = n_block; + + tf->nsect = qc->tag << 3; + tf->hob_feature = (n_block >> 8) & 0xff; + tf->feature = n_block & 0xff; + + tf->hob_lbah = (block >> 40) & 0xff; + tf->hob_lbam = (block >> 32) & 0xff; + tf->hob_lbal = (block >> 24) & 0xff; + tf->lbah = (block >> 16) & 0xff; + tf->lbam = (block >> 8) & 0xff; + tf->lbal = block & 0xff; + + tf->device = 1 << 6; + if (tf->flags & ATA_TFLAG_FUA) + tf->device |= 1 << 7; + } else if (dev->flags & ATA_DFLAG_LBA) { tf->flags |= ATA_TFLAG_LBA; if (lba_28_ok(block, n_block)) { @@ -1356,10 +1293,8 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) } } - if (need_sense) { - /* The ata_gen_..._sense routines fill in tf */ - ata_dump_status(qc->ap->id, &qc->tf); - } + if (need_sense && !qc->ap->ops->error_handler) + ata_dump_status(qc->ap->id, &qc->result_tf); qc->scsidone(cmd); @@ -1367,8 +1302,40 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) } /** + * ata_scmd_need_defer - Check whether we need to defer scmd + * @dev: ATA device to which the command is addressed + * @is_io: Is the command IO (and thus possibly NCQ)? + * + * NCQ and non-NCQ commands cannot run together. As upper layer + * only knows the queue depth, we are responsible for maintaining + * exclusion. This function checks whether a new command can be + * issued to @dev. + * + * LOCKING: + * spin_lock_irqsave(host_set lock) + * + * RETURNS: + * 1 if deferring is needed, 0 otherwise. + */ +static int ata_scmd_need_defer(struct ata_device *dev, int is_io) +{ + struct ata_port *ap = dev->ap; + + if (!(dev->flags & ATA_DFLAG_NCQ)) + return 0; + + if (is_io) { + if (!ata_tag_valid(ap->active_tag)) + return 0; + } else { + if (!ata_tag_valid(ap->active_tag) && !ap->sactive) + return 0; + } + return 1; +} + +/** * ata_scsi_translate - Translate then issue SCSI command to ATA device - * @ap: ATA port to which the command is addressed * @dev: ATA device to which the command is addressed * @cmd: SCSI command to execute * @done: SCSI command completion function @@ -1389,19 +1356,25 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) * * LOCKING: * spin_lock_irqsave(host_set lock) + * + * RETURNS: + * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command + * needs to be deferred. */ - -static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, - struct scsi_cmnd *cmd, +static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), ata_xlat_func_t xlat_func) { struct ata_queued_cmd *qc; u8 *scsicmd = cmd->cmnd; + int is_io = xlat_func == ata_scsi_rw_xlat; VPRINTK("ENTER\n"); - qc = ata_scsi_qc_new(ap, dev, cmd, done); + if (unlikely(ata_scmd_need_defer(dev, is_io))) + goto defer; + + qc = ata_scsi_qc_new(dev, cmd, done); if (!qc) goto err_mem; @@ -1409,8 +1382,8 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, if (cmd->sc_data_direction == DMA_FROM_DEVICE || cmd->sc_data_direction == DMA_TO_DEVICE) { if (unlikely(cmd->request_bufflen < 1)) { - printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n", - ap->id, dev->devno); + ata_dev_printk(dev, KERN_WARNING, + "WARNING: zero len r/w req\n"); goto err_did; } @@ -1432,13 +1405,13 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, ata_qc_issue(qc); VPRINTK("EXIT\n"); - return; + return 0; early_finish: ata_qc_free(qc); done(cmd); DPRINTK("EXIT - early finish (good or error)\n"); - return; + return 0; err_did: ata_qc_free(qc); @@ -1446,7 +1419,11 @@ err_mem: cmd->result = (DID_ERROR << 16); done(cmd); DPRINTK("EXIT - internal\n"); - return; + return 0; + +defer: + DPRINTK("EXIT - defer\n"); + return SCSI_MLQUEUE_DEVICE_BUSY; } /** @@ -2137,13 +2114,14 @@ void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 static void atapi_sense_complete(struct ata_queued_cmd *qc) { - if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) + if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { /* FIXME: not quite right; we don't want the * translation of taskfile registers into * a sense descriptors, since that's only * correct for ATA, not ATAPI */ ata_gen_ata_desc_sense(qc); + } qc->scsidone(qc->scsicmd); ata_qc_free(qc); @@ -2207,21 +2185,38 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc) VPRINTK("ENTER, err_mask 0x%X\n", err_mask); + /* handle completion from new EH */ + if (unlikely(qc->ap->ops->error_handler && + (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { + + if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { + /* FIXME: not quite right; we don't want the + * translation of taskfile registers into a + * sense descriptors, since that's only + * correct for ATA, not ATAPI + */ + ata_gen_ata_desc_sense(qc); + } + + qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; + qc->scsidone(cmd); + ata_qc_free(qc); + return; + } + + /* successful completion or old EH failure path */ if (unlikely(err_mask & AC_ERR_DEV)) { cmd->result = SAM_STAT_CHECK_CONDITION; atapi_request_sense(qc); return; - } - - else if (unlikely(err_mask)) + } else if (unlikely(err_mask)) { /* FIXME: not quite right; we don't want the * translation of taskfile registers into * a sense descriptors, since that's only * correct for ATA, not ATAPI */ ata_gen_ata_desc_sense(qc); - - else { + } else { u8 *scsicmd = cmd->cmnd; if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { @@ -2303,11 +2298,9 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) qc->tf.protocol = ATA_PROT_ATAPI_DMA; qc->tf.feature |= ATAPI_PKT_DMA; -#ifdef ATAPI_ENABLE_DMADIR - /* some SATA bridges need us to indicate data xfer direction */ - if (cmd->sc_data_direction != DMA_TO_DEVICE) + if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE)) + /* some SATA bridges need us to indicate data xfer direction */ qc->tf.feature |= ATAPI_DMADIR; -#endif } qc->nbytes = cmd->bufflen; @@ -2347,13 +2340,14 @@ ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) (scsidev->lun != 0))) return NULL; - if (unlikely(!ata_dev_present(dev))) + if (unlikely(!ata_dev_enabled(dev))) return NULL; if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) { if (unlikely(dev->class == ATA_DEV_ATAPI)) { - printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n", - ap->id, dev->devno, atapi_enabled ? "not supported with this driver" : "disabled"); + ata_dev_printk(dev, KERN_WARNING, + "WARNING: ATAPI is %s, device ignored.\n", + atapi_enabled ? "not supported with this driver" : "disabled"); return NULL; } } @@ -2502,6 +2496,9 @@ ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd) */ qc->nsect = cmd->bufflen / ATA_SECT_SIZE; + /* request result TF */ + qc->flags |= ATA_QCFLAG_RESULT_TF; + return 0; invalid_fld: @@ -2578,19 +2575,24 @@ static inline void ata_scsi_dump_cdb(struct ata_port *ap, #endif } -static inline void __ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), - struct ata_port *ap, struct ata_device *dev) +static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd, + void (*done)(struct scsi_cmnd *), + struct ata_device *dev) { + int rc = 0; + if (dev->class == ATA_DEV_ATA) { ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, cmd->cmnd[0]); if (xlat_func) - ata_scsi_translate(ap, dev, cmd, done, xlat_func); + rc = ata_scsi_translate(dev, cmd, done, xlat_func); else - ata_scsi_simulate(ap, dev, cmd, done); + ata_scsi_simulate(dev, cmd, done); } else - ata_scsi_translate(ap, dev, cmd, done, atapi_xlat); + rc = ata_scsi_translate(dev, cmd, done, atapi_xlat); + + return rc; } /** @@ -2609,17 +2611,18 @@ static inline void __ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struc * Releases scsi-layer-held lock, and obtains host_set lock. * * RETURNS: - * Zero. + * Return value from __ata_scsi_queuecmd() if @cmd can be queued, + * 0 otherwise. */ - int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) { struct ata_port *ap; struct ata_device *dev; struct scsi_device *scsidev = cmd->device; struct Scsi_Host *shost = scsidev->host; + int rc = 0; - ap = (struct ata_port *) &shost->hostdata[0]; + ap = ata_shost_to_port(shost); spin_unlock(shost->host_lock); spin_lock(&ap->host_set->lock); @@ -2628,7 +2631,7 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) dev = ata_scsi_find_dev(ap, scsidev); if (likely(dev)) - __ata_scsi_queuecmd(cmd, done, ap, dev); + rc = __ata_scsi_queuecmd(cmd, done, dev); else { cmd->result = (DID_BAD_TARGET << 16); done(cmd); @@ -2636,12 +2639,11 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) spin_unlock(&ap->host_set->lock); spin_lock(shost->host_lock); - return 0; + return rc; } /** * ata_scsi_simulate - simulate SCSI command on ATA device - * @ap: port the device is connected to * @dev: the target device * @cmd: SCSI command being sent to device. * @done: SCSI command completion function. @@ -2653,14 +2655,12 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) * spin_lock_irqsave(host_set lock) */ -void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev, - struct scsi_cmnd *cmd, +void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) { struct ata_scsi_args args; const u8 *scsicmd = cmd->cmnd; - args.ap = ap; args.dev = dev; args.id = dev->id; args.cmd = cmd; @@ -2735,14 +2735,13 @@ void ata_scsi_scan_host(struct ata_port *ap) struct ata_device *dev; unsigned int i; - if (ap->flags & ATA_FLAG_PORT_DISABLED) + if (ap->flags & ATA_FLAG_DISABLED) return; for (i = 0; i < ATA_MAX_DEVICES; i++) { dev = &ap->device[i]; - if (ata_dev_present(dev)) + if (ata_dev_enabled(dev)) scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0); } } - diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h index bac8cbae06fe9..b76ad7d7062af 100644 --- a/drivers/scsi/libata.h +++ b/drivers/scsi/libata.h @@ -29,10 +29,9 @@ #define __LIBATA_H__ #define DRV_NAME "libata" -#define DRV_VERSION "1.20" /* must be exactly four chars */ +#define DRV_VERSION "1.30" /* must be exactly four chars */ struct ata_scsi_args { - struct ata_port *ap; struct ata_device *dev; u16 *id; struct scsi_cmnd *cmd; @@ -41,13 +40,24 @@ struct ata_scsi_args { /* libata-core.c */ extern int atapi_enabled; +extern int atapi_dmadir; extern int libata_fua; -extern struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, - struct ata_device *dev); +extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev); extern int ata_rwcmd_protocol(struct ata_queued_cmd *qc); +extern void ata_dev_disable(struct ata_device *dev); extern void ata_port_flush_task(struct ata_port *ap); +extern unsigned ata_exec_internal(struct ata_device *dev, + struct ata_taskfile *tf, const u8 *cdb, + int dma_dir, void *buf, unsigned int buflen); +extern int sata_down_spd_limit(struct ata_port *ap); +extern int sata_set_spd_needed(struct ata_port *ap); +extern int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0); +extern int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); +extern int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset, + unsigned int *classes); extern void ata_qc_free(struct ata_queued_cmd *qc); extern void ata_qc_issue(struct ata_queued_cmd *qc); +extern void __ata_qc_complete(struct ata_queued_cmd *qc); extern int ata_check_atapi_dma(struct ata_queued_cmd *qc); extern void ata_dev_select(struct ata_port *ap, unsigned int device, unsigned int wait, unsigned int can_sleep); @@ -88,5 +98,11 @@ extern void ata_scsi_set_sense(struct scsi_cmnd *cmd, extern void ata_scsi_rbuf_fill(struct ata_scsi_args *args, unsigned int (*actor) (struct ata_scsi_args *args, u8 *rbuf, unsigned int buflen)); +extern void ata_schedule_scsi_eh(struct Scsi_Host *shost); + +/* libata-eh.c */ +extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd); +extern void ata_scsi_error(struct Scsi_Host *host); +extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc); #endif /* __LIBATA_H__ */ diff --git a/drivers/scsi/pdc_adma.c b/drivers/scsi/pdc_adma.c index 5cda16cfacb03..a341fa8d3291c 100644 --- a/drivers/scsi/pdc_adma.c +++ b/drivers/scsi/pdc_adma.c @@ -46,7 +46,7 @@ #include <linux/libata.h> #define DRV_NAME "pdc_adma" -#define DRV_VERSION "0.03" +#define DRV_VERSION "0.04" /* macro to calculate base address for ATA regs */ #define ADMA_ATA_REGS(base,port_no) ((base) + ((port_no) * 0x40)) @@ -455,13 +455,13 @@ static inline unsigned int adma_intr_pkt(struct ata_host_set *host_set) continue; handled = 1; adma_enter_reg_mode(ap); - if (ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR)) + if (ap->flags & ATA_FLAG_DISABLED) continue; pp = ap->private_data; if (!pp || pp->state != adma_state_pkt) continue; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN))) { + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { if ((status & (aPERR | aPSD | aUIRQ))) qc->err_mask |= AC_ERR_OTHER; else if (pp->pkt[0] != cDONE) @@ -480,13 +480,13 @@ static inline unsigned int adma_intr_mmio(struct ata_host_set *host_set) for (port_no = 0; port_no < host_set->n_ports; ++port_no) { struct ata_port *ap; ap = host_set->ports[port_no]; - if (ap && (!(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR)))) { + if (ap && (!(ap->flags & ATA_FLAG_DISABLED))) { struct ata_queued_cmd *qc; struct adma_port_priv *pp = ap->private_data; if (!pp || pp->state != adma_state_mmio) continue; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN))) { + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { /* check main status, clearing INTRQ */ u8 status = ata_check_status(ap); diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c index 9b8bca1ac1f01..bfe817fc75200 100644 --- a/drivers/scsi/sata_mv.c +++ b/drivers/scsi/sata_mv.c @@ -93,7 +93,7 @@ enum { MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */ MV_COMMON_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | - ATA_FLAG_NO_ATAPI), + ATA_FLAG_PIO_POLLING), MV_6XXX_FLAGS = MV_FLAG_IRQ_COALESCE, CRQB_FLAG_READ = (1 << 0), @@ -683,7 +683,7 @@ static void mv_stop_dma(struct ata_port *ap) } if (EDMA_EN & reg) { - printk(KERN_ERR "ata%u: Unable to stop eDMA\n", ap->id); + ata_port_printk(ap, KERN_ERR, "Unable to stop eDMA\n"); /* FIXME: Consider doing a reset here to recover */ } } @@ -1307,8 +1307,8 @@ static void mv_err_intr(struct ata_port *ap, int reset_allowed) edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); if (EDMA_ERR_SERR & edma_err_cause) { - serr = scr_read(ap, SCR_ERROR); - scr_write_flush(ap, SCR_ERROR, serr); + sata_scr_read(ap, SCR_ERROR, &serr); + sata_scr_write_flush(ap, SCR_ERROR, serr); } if (EDMA_ERR_SELF_DIS & edma_err_cause) { struct mv_port_priv *pp = ap->private_data; @@ -1398,7 +1398,7 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant, } } - if (ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR)) + if (ap && (ap->flags & ATA_FLAG_DISABLED)) continue; err_mask = ac_err_mask(ata_status); @@ -1419,7 +1419,7 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant, VPRINTK("port %u IRQ found for qc, " "ata_status 0x%x\n", port,ata_status); /* mark qc status appropriately */ - if (!(qc->tf.ctl & ATA_NIEN)) { + if (!(qc->tf.flags & ATA_TFLAG_POLLING)) { qc->err_mask |= err_mask; ata_qc_complete(qc); } @@ -1949,15 +1949,16 @@ static void __mv_phy_reset(struct ata_port *ap, int can_sleep) /* Issue COMRESET via SControl */ comreset_retry: - scr_write_flush(ap, SCR_CONTROL, 0x301); + sata_scr_write_flush(ap, SCR_CONTROL, 0x301); __msleep(1, can_sleep); - scr_write_flush(ap, SCR_CONTROL, 0x300); + sata_scr_write_flush(ap, SCR_CONTROL, 0x300); __msleep(20, can_sleep); timeout = jiffies + msecs_to_jiffies(200); do { - sstatus = scr_read(ap, SCR_STATUS) & 0x3; + sata_scr_read(ap, SCR_STATUS, &sstatus); + sstatus &= 0x3; if ((sstatus == 3) || (sstatus == 0)) break; @@ -1974,11 +1975,12 @@ comreset_retry: "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS), mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL)); - if (sata_dev_present(ap)) { + if (ata_port_online(ap)) { ata_port_probe(ap); } else { - printk(KERN_INFO "ata%u: no device found (phy stat %08x)\n", - ap->id, scr_read(ap, SCR_STATUS)); + sata_scr_read(ap, SCR_STATUS, &sstatus); + ata_port_printk(ap, KERN_INFO, + "no device found (phy stat %08x)\n", sstatus); ata_port_disable(ap); return; } @@ -2005,7 +2007,7 @@ comreset_retry: tf.nsect = readb((void __iomem *) ap->ioaddr.nsect_addr); dev->class = ata_dev_classify(&tf); - if (!ata_dev_present(dev)) { + if (!ata_dev_enabled(dev)) { VPRINTK("Port disabled post-sig: No device present.\n"); ata_port_disable(ap); } @@ -2036,7 +2038,7 @@ static void mv_eng_timeout(struct ata_port *ap) { struct ata_queued_cmd *qc; - printk(KERN_ERR "ata%u: Entering mv_eng_timeout\n",ap->id); + ata_port_printk(ap, KERN_ERR, "Entering mv_eng_timeout\n"); DPRINTK("All regs @ start of eng_timeout\n"); mv_dump_all_regs(ap->host_set->mmio_base, ap->port_no, to_pci_dev(ap->host_set->dev)); diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c index 9f553081b5e83..70c51088d371f 100644 --- a/drivers/scsi/sata_nv.c +++ b/drivers/scsi/sata_nv.c @@ -44,7 +44,7 @@ #include <linux/libata.h> #define DRV_NAME "sata_nv" -#define DRV_VERSION "0.8" +#define DRV_VERSION "0.9" enum { NV_PORTS = 2, @@ -279,11 +279,11 @@ static irqreturn_t nv_interrupt (int irq, void *dev_instance, ap = host_set->ports[i]; if (ap && - !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) { + !(ap->flags & ATA_FLAG_DISABLED)) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN))) + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) handled += ata_host_intr(ap, qc); else // No request pending? Clear interrupt status diff --git a/drivers/scsi/sata_promise.c b/drivers/scsi/sata_promise.c index 7eb67a6bdc64c..bb000438cb6c0 100644 --- a/drivers/scsi/sata_promise.c +++ b/drivers/scsi/sata_promise.c @@ -76,7 +76,8 @@ enum { PDC_RESET = (1 << 11), /* HDMA reset */ PDC_COMMON_FLAGS = ATA_FLAG_NO_LEGACY | ATA_FLAG_SRST | - ATA_FLAG_MMIO | ATA_FLAG_NO_ATAPI, + ATA_FLAG_MMIO | ATA_FLAG_NO_ATAPI | + ATA_FLAG_PIO_POLLING, }; @@ -435,7 +436,7 @@ static void pdc_eng_timeout(struct ata_port *ap) switch (qc->tf.protocol) { case ATA_PROT_DMA: case ATA_PROT_NODATA: - printk(KERN_ERR "ata%u: command timeout\n", ap->id); + ata_port_printk(ap, KERN_ERR, "command timeout\n"); drv_stat = ata_wait_idle(ap); qc->err_mask |= __ac_err_mask(drv_stat); break; @@ -443,8 +444,9 @@ static void pdc_eng_timeout(struct ata_port *ap) default: drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); - printk(KERN_ERR "ata%u: unknown timeout, cmd 0x%x stat 0x%x\n", - ap->id, qc->tf.command, drv_stat); + ata_port_printk(ap, KERN_ERR, + "unknown timeout, cmd 0x%x stat 0x%x\n", + qc->tf.command, drv_stat); qc->err_mask |= ac_err_mask(drv_stat); break; @@ -533,11 +535,11 @@ static irqreturn_t pdc_interrupt (int irq, void *dev_instance, struct pt_regs *r ap = host_set->ports[i]; tmp = mask & (1 << (i + 1)); if (tmp && ap && - !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) { + !(ap->flags & ATA_FLAG_DISABLED)) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN))) + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) handled += pdc_host_intr(ap, qc); } } @@ -676,10 +678,6 @@ static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *e if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); - /* - * If this driver happens to only be useful on Apple's K2, then - * we should check that here as it has a normal Serverworks ID - */ rc = pci_enable_device(pdev); if (rc) return rc; diff --git a/drivers/scsi/sata_qstor.c b/drivers/scsi/sata_qstor.c index 886f3447dd48b..54283e06070e5 100644 --- a/drivers/scsi/sata_qstor.c +++ b/drivers/scsi/sata_qstor.c @@ -41,7 +41,7 @@ #include <linux/libata.h> #define DRV_NAME "sata_qstor" -#define DRV_VERSION "0.05" +#define DRV_VERSION "0.06" enum { QS_PORTS = 4, @@ -175,7 +175,7 @@ static const struct ata_port_info qs_port_info[] = { .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | //FIXME ATA_FLAG_SRST | - ATA_FLAG_MMIO, + ATA_FLAG_MMIO | ATA_FLAG_PIO_POLLING, .pio_mask = 0x10, /* pio4 */ .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &qs_ata_ops, @@ -394,14 +394,13 @@ static inline unsigned int qs_intr_pkt(struct ata_host_set *host_set) DPRINTK("SFF=%08x%08x: sCHAN=%u sHST=%d sDST=%02x\n", sff1, sff0, port_no, sHST, sDST); handled = 1; - if (ap && !(ap->flags & - (ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) { + if (ap && !(ap->flags & ATA_FLAG_DISABLED)) { struct ata_queued_cmd *qc; struct qs_port_priv *pp = ap->private_data; if (!pp || pp->state != qs_state_pkt) continue; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN))) { + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { switch (sHST) { case 0: /* successful CPB */ case 3: /* device error */ @@ -428,13 +427,13 @@ static inline unsigned int qs_intr_mmio(struct ata_host_set *host_set) struct ata_port *ap; ap = host_set->ports[port_no]; if (ap && - !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) { + !(ap->flags & ATA_FLAG_DISABLED)) { struct ata_queued_cmd *qc; struct qs_port_priv *pp = ap->private_data; if (!pp || pp->state != qs_state_mmio) continue; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN))) { + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { /* check main status, clearing INTRQ */ u8 status = ata_check_status(ap); diff --git a/drivers/scsi/sata_sil.c b/drivers/scsi/sata_sil.c index 106627299d55f..aa63044eed2ed 100644 --- a/drivers/scsi/sata_sil.c +++ b/drivers/scsi/sata_sil.c @@ -46,7 +46,7 @@ #include <linux/libata.h> #define DRV_NAME "sata_sil" -#define DRV_VERSION "0.9" +#define DRV_VERSION "1.0" enum { /* @@ -96,6 +96,8 @@ static void sil_dev_config(struct ata_port *ap, struct ata_device *dev); static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg); static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val); static void sil_post_set_mode (struct ata_port *ap); +static void sil_freeze(struct ata_port *ap); +static void sil_thaw(struct ata_port *ap); static const struct pci_device_id sil_pci_tbl[] = { @@ -174,7 +176,10 @@ static const struct ata_port_operations sil_ops = { .bmdma_status = ata_bmdma_status, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, - .eng_timeout = ata_eng_timeout, + .freeze = sil_freeze, + .thaw = sil_thaw, + .error_handler = ata_bmdma_error_handler, + .post_internal_cmd = ata_bmdma_post_internal_cmd, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .scr_read = sil_scr_read, @@ -263,7 +268,7 @@ static void sil_post_set_mode (struct ata_port *ap) for (i = 0; i < 2; i++) { dev = &ap->device[i]; - if (!ata_dev_present(dev)) + if (!ata_dev_enabled(dev)) dev_mode[i] = 0; /* PIO0/1/2 */ else if (dev->flags & ATA_DFLAG_PIO) dev_mode[i] = 1; /* PIO3/4 */ @@ -314,6 +319,33 @@ static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) writel(val, mmio); } +static void sil_freeze(struct ata_port *ap) +{ + void __iomem *mmio_base = ap->host_set->mmio_base; + u32 tmp; + + /* plug IRQ */ + tmp = readl(mmio_base + SIL_SYSCFG); + tmp |= SIL_MASK_IDE0_INT << ap->port_no; + writel(tmp, mmio_base + SIL_SYSCFG); + readl(mmio_base + SIL_SYSCFG); /* flush */ +} + +static void sil_thaw(struct ata_port *ap) +{ + void __iomem *mmio_base = ap->host_set->mmio_base; + u32 tmp; + + /* clear IRQ */ + ata_chk_status(ap); + ata_bmdma_irq_clear(ap); + + /* turn on IRQ */ + tmp = readl(mmio_base + SIL_SYSCFG); + tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no); + writel(tmp, mmio_base + SIL_SYSCFG); +} + /** * sil_dev_config - Apply device/host-specific errata fixups * @ap: Port containing device to be examined @@ -360,16 +392,16 @@ static void sil_dev_config(struct ata_port *ap, struct ata_device *dev) if (slow_down || ((ap->flags & SIL_FLAG_MOD15WRITE) && (quirks & SIL_QUIRK_MOD15WRITE))) { - printk(KERN_INFO "ata%u(%u): applying Seagate errata fix (mod15write workaround)\n", - ap->id, dev->devno); + ata_dev_printk(dev, KERN_INFO, "applying Seagate errata fix " + "(mod15write workaround)\n"); dev->max_sectors = 15; return; } /* limit to udma5 */ if (quirks & SIL_QUIRK_UDMA5MAX) { - printk(KERN_INFO "ata%u(%u): applying Maxtor errata fix %s\n", - ap->id, dev->devno, model_num); + ata_dev_printk(dev, KERN_INFO, + "applying Maxtor errata fix %s\n", model_num); dev->udma_mask &= ATA_UDMA5; return; } @@ -384,16 +416,12 @@ static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) int rc; unsigned int i; int pci_dev_busy = 0; - u32 tmp, irq_mask; + u32 tmp; u8 cls; if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); - /* - * If this driver happens to only be useful on Apple's K2, then - * we should check that here as it has a normal Serverworks ID - */ rc = pci_enable_device(pdev); if (rc) return rc; @@ -478,24 +506,11 @@ static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) } if (ent->driver_data == sil_3114) { - irq_mask = SIL_MASK_4PORT; - /* flip the magic "make 4 ports work" bit */ tmp = readl(mmio_base + sil_port[2].bmdma); if ((tmp & SIL_INTR_STEERING) == 0) writel(tmp | SIL_INTR_STEERING, mmio_base + sil_port[2].bmdma); - - } else { - irq_mask = SIL_MASK_2PORT; - } - - /* make sure IDE0/1/2/3 interrupts are not masked */ - tmp = readl(mmio_base + SIL_SYSCFG); - if (tmp & irq_mask) { - tmp &= ~irq_mask; - writel(tmp, mmio_base + SIL_SYSCFG); - readl(mmio_base + SIL_SYSCFG); /* flush */ } /* mask all SATA phy-related interrupts */ diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index f7264fd611c22..4c76f05d9b650 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -31,7 +31,7 @@ #include <asm/io.h> #define DRV_NAME "sata_sil24" -#define DRV_VERSION "0.23" +#define DRV_VERSION "0.24" /* * Port request block (PRB) 32 bytes @@ -86,6 +86,13 @@ enum { /* HOST_SLOT_STAT bits */ HOST_SSTAT_ATTN = (1 << 31), + /* HOST_CTRL bits */ + HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */ + HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */ + HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */ + HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */ + HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */ + /* * Port registers * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2) @@ -142,8 +149,15 @@ enum { PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */ PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */ PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */ - PORT_IRQ_UNK_FIS = (1 << 6), /* Unknown FIS received */ - PORT_IRQ_SDB_FIS = (1 << 11), /* SDB FIS received */ + PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */ + PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */ + PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */ + PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */ + PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */ + PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */ + + DEF_PORT_IRQ = PORT_IRQ_COMPLETE | PORT_IRQ_ERROR | + PORT_IRQ_DEV_XCHG | PORT_IRQ_UNK_FIS, /* bits[27:16] are unmasked (raw) */ PORT_IRQ_RAW_SHIFT = 16, @@ -174,7 +188,7 @@ enum { PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */ PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */ PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */ - PORT_CERR_XFR_MSGABRT = 34, /* PSD ecode 10 - master abort */ + PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */ PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */ PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */ @@ -202,11 +216,19 @@ enum { SGE_DRD = (1 << 29), /* discard data read (/dev/null) data address ignored */ + SIL24_MAX_CMDS = 31, + /* board id */ BID_SIL3124 = 0, BID_SIL3132 = 1, BID_SIL3131 = 2, + /* host flags */ + SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | + ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | + ATA_FLAG_NCQ, + SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */ + IRQ_STAT_4PORTS = 0xf, }; @@ -226,6 +248,58 @@ union sil24_cmd_block { struct sil24_atapi_block atapi; }; +static struct sil24_cerr_info { + unsigned int err_mask, action; + const char *desc; +} sil24_cerr_db[] = { + [0] = { AC_ERR_DEV, ATA_EH_REVALIDATE, + "device error" }, + [PORT_CERR_DEV] = { AC_ERR_DEV, ATA_EH_REVALIDATE, + "device error via D2H FIS" }, + [PORT_CERR_SDB] = { AC_ERR_DEV, ATA_EH_REVALIDATE, + "device error via SDB FIS" }, + [PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_SOFTRESET, + "error in data FIS" }, + [PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_SOFTRESET, + "failed to transmit command FIS" }, + [PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "protocol mismatch" }, + [PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "data directon mismatch" }, + [PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "ran out of SGEs while writing" }, + [PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "ran out of SGEs while reading" }, + [PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "invalid data directon for ATAPI CDB" }, + [PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_SOFTRESET, + "SGT no on qword boundary" }, + [PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI target abort while fetching SGT" }, + [PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI master abort while fetching SGT" }, + [PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI parity error while fetching SGT" }, + [PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_SOFTRESET, + "PRB not on qword boundary" }, + [PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI target abort while fetching PRB" }, + [PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI master abort while fetching PRB" }, + [PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI parity error while fetching PRB" }, + [PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "undefined error while transferring data" }, + [PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI target abort while transferring data" }, + [PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI master abort while transferring data" }, + [PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET, + "PCI parity error while transferring data" }, + [PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_SOFTRESET, + "FIS received while sending service FIS" }, +}; + /* * ap->private_data * @@ -253,8 +327,11 @@ static int sil24_probe_reset(struct ata_port *ap, unsigned int *classes); 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_eng_timeout(struct ata_port *ap); static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs); +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); +static void sil24_post_internal_cmd(struct ata_queued_cmd *qc); static int sil24_port_start(struct ata_port *ap); static void sil24_port_stop(struct ata_port *ap); static void sil24_host_stop(struct ata_host_set *host_set); @@ -281,7 +358,8 @@ static struct scsi_host_template sil24_sht = { .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, - .can_queue = ATA_DEF_QUEUE, + .change_queue_depth = ata_scsi_change_queue_depth, + .can_queue = SIL24_MAX_CMDS, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = LIBATA_MAX_PRD, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, @@ -309,14 +387,17 @@ static const struct ata_port_operations sil24_ops = { .qc_prep = sil24_qc_prep, .qc_issue = sil24_qc_issue, - .eng_timeout = sil24_eng_timeout, - .irq_handler = sil24_interrupt, .irq_clear = sil24_irq_clear, .scr_read = sil24_scr_read, .scr_write = sil24_scr_write, + .freeze = sil24_freeze, + .thaw = sil24_thaw, + .error_handler = sil24_error_handler, + .post_internal_cmd = sil24_post_internal_cmd, + .port_start = sil24_port_start, .port_stop = sil24_port_stop, .host_stop = sil24_host_stop, @@ -333,9 +414,8 @@ static struct ata_port_info sil24_port_info[] = { /* sil_3124 */ { .sht = &sil24_sht, - .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | - ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | - SIL24_NPORTS2FLAG(4), + .host_flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) | + SIL24_FLAG_PCIX_IRQ_WOC, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x3f, /* udma0-5 */ @@ -344,9 +424,7 @@ static struct ata_port_info sil24_port_info[] = { /* sil_3132 */ { .sht = &sil24_sht, - .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | - ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | - SIL24_NPORTS2FLAG(2), + .host_flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2), .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x3f, /* udma0-5 */ @@ -355,9 +433,7 @@ static struct ata_port_info sil24_port_info[] = { /* sil_3131/sil_3531 */ { .sht = &sil24_sht, - .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | - ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | - SIL24_NPORTS2FLAG(1), + .host_flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1), .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x3f, /* udma0-5 */ @@ -365,6 +441,13 @@ static struct ata_port_info sil24_port_info[] = { }, }; +static int sil24_tag(int tag) +{ + if (unlikely(ata_tag_internal(tag))) + return 0; + return tag; +} + static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev) { void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; @@ -426,56 +509,65 @@ static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf) *tf = pp->tf; } -static int sil24_softreset(struct ata_port *ap, int verbose, - unsigned int *class) +static int sil24_init_port(struct ata_port *ap) +{ + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + u32 tmp; + + writel(PORT_CS_INIT, port + PORT_CTRL_STAT); + ata_wait_register(port + PORT_CTRL_STAT, + PORT_CS_INIT, PORT_CS_INIT, 10, 100); + tmp = ata_wait_register(port + PORT_CTRL_STAT, + PORT_CS_RDY, 0, 10, 100); + + if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) + return -EIO; + return 0; +} + +static int sil24_softreset(struct ata_port *ap, unsigned int *class) { void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; struct sil24_port_priv *pp = ap->private_data; struct sil24_prb *prb = &pp->cmd_block[0].ata.prb; dma_addr_t paddr = pp->cmd_block_dma; - unsigned long timeout = jiffies + ATA_TMOUT_BOOT * HZ; - u32 irq_enable, irq_stat; + u32 mask, irq_stat; + const char *reason; DPRINTK("ENTER\n"); - if (!sata_dev_present(ap)) { + if (ata_port_offline(ap)) { DPRINTK("PHY reports no device\n"); *class = ATA_DEV_NONE; goto out; } - /* temporarily turn off IRQs during SRST */ - irq_enable = readl(port + PORT_IRQ_ENABLE_SET); - writel(irq_enable, port + PORT_IRQ_ENABLE_CLR); - - /* - * XXX: Not sure whether the following sleep is needed or not. - * The original driver had it. So.... - */ - msleep(10); + /* put the port into known state */ + if (sil24_init_port(ap)) { + reason ="port not ready"; + goto err; + } - prb->ctrl = PRB_CTRL_SRST; + /* do SRST */ + prb->ctrl = cpu_to_le16(PRB_CTRL_SRST); prb->fis[1] = 0; /* no PM yet */ writel((u32)paddr, port + PORT_CMD_ACTIVATE); + writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4); - do { - irq_stat = readl(port + PORT_IRQ_STAT); - writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */ + mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT; + irq_stat = ata_wait_register(port + PORT_IRQ_STAT, mask, 0x0, + 100, ATA_TMOUT_BOOT / HZ * 1000); - irq_stat >>= PORT_IRQ_RAW_SHIFT; - if (irq_stat & (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR)) - break; - - msleep(100); - } while (time_before(jiffies, timeout)); - - /* restore IRQs */ - writel(irq_enable, port + PORT_IRQ_ENABLE_SET); + writel(irq_stat, port + PORT_IRQ_STAT); /* clear IRQs */ + irq_stat >>= PORT_IRQ_RAW_SHIFT; if (!(irq_stat & PORT_IRQ_COMPLETE)) { - DPRINTK("EXIT, srst failed\n"); - return -EIO; + if (irq_stat & PORT_IRQ_ERROR) + reason = "SRST command error"; + else + reason = "timeout"; + goto err; } sil24_update_tf(ap); @@ -487,15 +579,55 @@ static int sil24_softreset(struct ata_port *ap, int verbose, out: DPRINTK("EXIT, class=%u\n", *class); return 0; + + err: + ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason); + return -EIO; } -static int sil24_hardreset(struct ata_port *ap, int verbose, - unsigned int *class) +static int sil24_hardreset(struct ata_port *ap, unsigned int *class) { - unsigned int dummy_class; + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + const char *reason; + int tout_msec; + u32 tmp; + + /* sil24 does the right thing(tm) without any protection */ + sata_set_spd(ap); + + tout_msec = 100; + if (ata_port_online(ap)) + tout_msec = 5000; - /* sil24 doesn't report device signature after hard reset */ - return sata_std_hardreset(ap, verbose, &dummy_class); + writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); + tmp = ata_wait_register(port + PORT_CTRL_STAT, + PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10, tout_msec); + + /* SStatus oscillates between zero and valid status for short + * duration after DEV_RST, give it time to settle. + */ + msleep(100); + + if (tmp & PORT_CS_DEV_RST) { + if (ata_port_offline(ap)) + return 0; + reason = "link not ready"; + goto err; + } + + if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { + reason = "device not ready"; + goto err; + } + + /* sil24 doesn't report device class code after hardreset, + * leave *class alone. + */ + return 0; + + err: + ata_port_printk(ap, KERN_ERR, "hardreset failed (%s)\n", reason); + return -EIO; } static int sil24_probe_reset(struct ata_port *ap, unsigned int *classes) @@ -528,17 +660,20 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct sil24_port_priv *pp = ap->private_data; - union sil24_cmd_block *cb = pp->cmd_block + qc->tag; + union sil24_cmd_block *cb; struct sil24_prb *prb; struct sil24_sge *sge; + u16 ctrl = 0; + + cb = &pp->cmd_block[sil24_tag(qc->tag)]; switch (qc->tf.protocol) { case ATA_PROT_PIO: case ATA_PROT_DMA: + case ATA_PROT_NCQ: case ATA_PROT_NODATA: prb = &cb->ata.prb; sge = cb->ata.sge; - prb->ctrl = 0; break; case ATA_PROT_ATAPI: @@ -551,12 +686,10 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc) if (qc->tf.protocol != ATA_PROT_ATAPI_NODATA) { if (qc->tf.flags & ATA_TFLAG_WRITE) - prb->ctrl = PRB_CTRL_PACKET_WRITE; + ctrl = PRB_CTRL_PACKET_WRITE; else - prb->ctrl = PRB_CTRL_PACKET_READ; - } else - prb->ctrl = 0; - + ctrl = PRB_CTRL_PACKET_READ; + } break; default: @@ -565,6 +698,7 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc) BUG(); } + prb->ctrl = cpu_to_le16(ctrl); ata_tf_to_fis(&qc->tf, prb->fis, 0); if (qc->flags & ATA_QCFLAG_DMAMAP) @@ -574,11 +708,18 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc) static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; - void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; struct sil24_port_priv *pp = ap->private_data; - dma_addr_t paddr = pp->cmd_block_dma + qc->tag * sizeof(*pp->cmd_block); + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + unsigned int tag = sil24_tag(qc->tag); + dma_addr_t paddr; + void __iomem *activate; + + paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block); + activate = port + PORT_CMD_ACTIVATE + tag * 8; + + writel((u32)paddr, activate); + writel((u64)paddr >> 32, activate + 4); - writel((u32)paddr, port + PORT_CMD_ACTIVATE); return 0; } @@ -587,162 +728,141 @@ static void sil24_irq_clear(struct ata_port *ap) /* unused */ } -static int __sil24_restart_controller(void __iomem *port) +static void sil24_freeze(struct ata_port *ap) { - u32 tmp; - int cnt; - - writel(PORT_CS_INIT, port + PORT_CTRL_STAT); - - /* Max ~10ms */ - for (cnt = 0; cnt < 10000; cnt++) { - tmp = readl(port + PORT_CTRL_STAT); - if (tmp & PORT_CS_RDY) - return 0; - udelay(1); - } + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; - return -1; + /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear + * PORT_IRQ_ENABLE instead. + */ + writel(0xffff, port + PORT_IRQ_ENABLE_CLR); } -static void sil24_restart_controller(struct ata_port *ap) +static void sil24_thaw(struct ata_port *ap) { - if (__sil24_restart_controller((void __iomem *)ap->ioaddr.cmd_addr)) - printk(KERN_ERR DRV_NAME - " ata%u: failed to restart controller\n", ap->id); + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + u32 tmp; + + /* clear IRQ */ + tmp = readl(port + PORT_IRQ_STAT); + writel(tmp, port + PORT_IRQ_STAT); + + /* turn IRQ back on */ + writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET); } -static int __sil24_reset_controller(void __iomem *port) +static void sil24_error_intr(struct ata_port *ap) { - int cnt; - u32 tmp; + void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; + struct ata_eh_info *ehi = &ap->eh_info; + int freeze = 0; + u32 irq_stat; - /* Reset controller state. Is this correct? */ - writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); - readl(port + PORT_CTRL_STAT); /* sync */ + /* on error, we need to clear IRQ explicitly */ + irq_stat = readl(port + PORT_IRQ_STAT); + writel(irq_stat, port + PORT_IRQ_STAT); - /* Max ~100ms */ - for (cnt = 0; cnt < 1000; cnt++) { - udelay(100); - tmp = readl(port + PORT_CTRL_STAT); - if (!(tmp & PORT_CS_DEV_RST)) - break; - } + /* first, analyze and record host port events */ + ata_ehi_clear_desc(ehi); - if (tmp & PORT_CS_DEV_RST) - return -1; + ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat); - if (tmp & PORT_CS_RDY) - return 0; + if (irq_stat & PORT_IRQ_DEV_XCHG) { + ehi->err_mask |= AC_ERR_ATA_BUS; + /* sil24 doesn't recover very well from phy + * disconnection with a softreset. Force hardreset. + */ + ehi->action |= ATA_EH_HARDRESET; + ata_ehi_push_desc(ehi, ", device_exchanged"); + freeze = 1; + } - return __sil24_restart_controller(port); -} + if (irq_stat & PORT_IRQ_UNK_FIS) { + ehi->err_mask |= AC_ERR_HSM; + ehi->action |= ATA_EH_SOFTRESET; + ata_ehi_push_desc(ehi , ", unknown FIS"); + freeze = 1; + } -static void sil24_reset_controller(struct ata_port *ap) -{ - printk(KERN_NOTICE DRV_NAME - " ata%u: resetting controller...\n", ap->id); - if (__sil24_reset_controller((void __iomem *)ap->ioaddr.cmd_addr)) - printk(KERN_ERR DRV_NAME - " ata%u: failed to reset controller\n", ap->id); -} + /* deal with command error */ + 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; + + /* analyze CMD_ERR */ + cerr = readl(port + PORT_CMD_ERR); + if (cerr < ARRAY_SIZE(sil24_cerr_db)) + ci = &sil24_cerr_db[cerr]; + + if (ci && ci->desc) { + err_mask |= ci->err_mask; + action |= ci->action; + ata_ehi_push_desc(ehi, ", %s", ci->desc); + } else { + err_mask |= AC_ERR_OTHER; + action |= ATA_EH_SOFTRESET; + ata_ehi_push_desc(ehi, ", unknown command error %d", + cerr); + } -static void sil24_eng_timeout(struct ata_port *ap) -{ - struct ata_queued_cmd *qc; + /* record error info */ + qc = ata_qc_from_tag(ap, ap->active_tag); + if (qc) { + sil24_update_tf(ap); + qc->err_mask |= err_mask; + } else + ehi->err_mask |= err_mask; - qc = ata_qc_from_tag(ap, ap->active_tag); + ehi->action |= action; + } - printk(KERN_ERR "ata%u: command timeout\n", ap->id); - qc->err_mask |= AC_ERR_TIMEOUT; - ata_eh_qc_complete(qc); + /* freeze or abort */ + if (freeze) + ata_port_freeze(ap); + else + ata_port_abort(ap); +} - sil24_reset_controller(ap); +static void sil24_finish_qc(struct ata_queued_cmd *qc) +{ + if (qc->flags & ATA_QCFLAG_RESULT_TF) + sil24_update_tf(qc->ap); } -static void sil24_error_intr(struct ata_port *ap, u32 slot_stat) +static inline void sil24_host_intr(struct ata_port *ap) { - struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); - struct sil24_port_priv *pp = ap->private_data; void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; - u32 irq_stat, cmd_err, sstatus, serror; - unsigned int err_mask; + u32 slot_stat, qc_active; + int rc; - irq_stat = readl(port + PORT_IRQ_STAT); - writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */ + slot_stat = readl(port + PORT_SLOT_STAT); - if (!(irq_stat & PORT_IRQ_ERROR)) { - /* ignore non-completion, non-error irqs for now */ - printk(KERN_WARNING DRV_NAME - "ata%u: non-error exception irq (irq_stat %x)\n", - ap->id, irq_stat); + if (unlikely(slot_stat & HOST_SSTAT_ATTN)) { + sil24_error_intr(ap); return; } - cmd_err = readl(port + PORT_CMD_ERR); - sstatus = readl(port + PORT_SSTATUS); - serror = readl(port + PORT_SERROR); - if (serror) - writel(serror, port + PORT_SERROR); + if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) + writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT); - /* - * Don't log ATAPI device errors. They're supposed to happen - * and any serious errors will be logged using sense data by - * the SCSI layer. - */ - if (ap->device[0].class != ATA_DEV_ATAPI || cmd_err > PORT_CERR_SDB) - printk("ata%u: error interrupt on port%d\n" - " stat=0x%x irq=0x%x cmd_err=%d sstatus=0x%x serror=0x%x\n", - ap->id, ap->port_no, slot_stat, irq_stat, cmd_err, sstatus, serror); - - if (cmd_err == PORT_CERR_DEV || cmd_err == PORT_CERR_SDB) { - /* - * Device is reporting error, tf registers are valid. - */ - sil24_update_tf(ap); - err_mask = ac_err_mask(pp->tf.command); - sil24_restart_controller(ap); - } else { - /* - * Other errors. libata currently doesn't have any - * mechanism to report these errors. Just turn on - * ATA_ERR. - */ - err_mask = AC_ERR_OTHER; - sil24_reset_controller(ap); + qc_active = slot_stat & ~HOST_SSTAT_ATTN; + rc = ata_qc_complete_multiple(ap, qc_active, sil24_finish_qc); + if (rc > 0) + return; + if (rc < 0) { + struct ata_eh_info *ehi = &ap->eh_info; + ehi->err_mask |= AC_ERR_HSM; + ehi->action |= ATA_EH_SOFTRESET; + ata_port_freeze(ap); + return; } - if (qc) { - qc->err_mask |= err_mask; - ata_qc_complete(qc); - } -} - -static inline void sil24_host_intr(struct ata_port *ap) -{ - struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); - void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr; - u32 slot_stat; - - slot_stat = readl(port + PORT_SLOT_STAT); - if (!(slot_stat & HOST_SSTAT_ATTN)) { - struct sil24_port_priv *pp = ap->private_data; - /* - * !HOST_SSAT_ATTN guarantees successful completion, - * so reading back tf registers is unnecessary for - * most commands. TODO: read tf registers for - * commands which require these values on successful - * completion (EXECUTE DEVICE DIAGNOSTIC, CHECK POWER, - * DEVICE RESET and READ PORT MULTIPLIER (any more?). - */ - sil24_update_tf(ap); - - if (qc) { - qc->err_mask |= ac_err_mask(pp->tf.command); - ata_qc_complete(qc); - } - } else - sil24_error_intr(ap, slot_stat); + if (ata_ratelimit()) + ata_port_printk(ap, KERN_INFO, "spurious interrupt " + "(slot_stat 0x%x active_tag %d sactive 0x%x)\n", + slot_stat, ap->active_tag, ap->sactive); } static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs) @@ -769,7 +889,7 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs * for (i = 0; i < host_set->n_ports; i++) if (status & (1 << i)) { struct ata_port *ap = host_set->ports[i]; - if (ap && !(ap->flags & ATA_FLAG_PORT_DISABLED)) { + if (ap && !(ap->flags & ATA_FLAG_DISABLED)) { sil24_host_intr(host_set->ports[i]); handled++; } else @@ -782,9 +902,34 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs * return IRQ_RETVAL(handled); } +static void sil24_error_handler(struct ata_port *ap) +{ + struct ata_eh_context *ehc = &ap->eh_context; + + if (sil24_init_port(ap)) { + ata_eh_freeze_port(ap); + ehc->i.action |= ATA_EH_HARDRESET; + } + + /* perform recovery */ + ata_do_eh(ap, sil24_softreset, sil24_hardreset, ata_std_postreset); +} + +static void sil24_post_internal_cmd(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + + if (qc->flags & ATA_QCFLAG_FAILED) + qc->err_mask |= AC_ERR_OTHER; + + /* make DMA engine forget about the failed command */ + if (qc->err_mask) + sil24_init_port(ap); +} + static inline void sil24_cblk_free(struct sil24_port_priv *pp, struct device *dev) { - const size_t cb_size = sizeof(*pp->cmd_block); + const size_t cb_size = sizeof(*pp->cmd_block) * SIL24_MAX_CMDS; dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma); } @@ -794,7 +939,7 @@ static int sil24_port_start(struct ata_port *ap) struct device *dev = ap->host_set->dev; struct sil24_port_priv *pp; union sil24_cmd_block *cb; - size_t cb_size = sizeof(*cb); + size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS; dma_addr_t cb_dma; int rc = -ENOMEM; @@ -858,6 +1003,7 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) void __iomem *host_base = NULL; void __iomem *port_base = NULL; int i, rc; + u32 tmp; if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); @@ -910,35 +1056,51 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) /* * Configure the device */ - /* - * FIXME: This device is certainly 64-bit capable. We just - * don't know how to use it. After fixing 32bit activation in - * this function, enable 64bit masks here. - */ - rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); - if (rc) { - dev_printk(KERN_ERR, &pdev->dev, - "32-bit DMA enable failed\n"); - goto out_free; - } - rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); - if (rc) { - dev_printk(KERN_ERR, &pdev->dev, - "32-bit consistent DMA enable failed\n"); - goto out_free; + if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) { + rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); + if (rc) { + rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + dev_printk(KERN_ERR, &pdev->dev, + "64-bit DMA enable failed\n"); + goto out_free; + } + } + } else { + rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + dev_printk(KERN_ERR, &pdev->dev, + "32-bit DMA enable failed\n"); + goto out_free; + } + rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + dev_printk(KERN_ERR, &pdev->dev, + "32-bit consistent DMA enable failed\n"); + goto out_free; + } } /* GPIO off */ writel(0, host_base + HOST_FLASH_CMD); - /* Mask interrupts during initialization */ + /* Apply workaround for completion IRQ loss on PCI-X errata */ + if (probe_ent->host_flags & SIL24_FLAG_PCIX_IRQ_WOC) { + tmp = readl(host_base + HOST_CTRL); + if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL)) + dev_printk(KERN_INFO, &pdev->dev, + "Applying completion IRQ loss on PCI-X " + "errata fix\n"); + else + probe_ent->host_flags &= ~SIL24_FLAG_PCIX_IRQ_WOC; + } + + /* clear global reset & mask interrupts during initialization */ writel(0, host_base + HOST_CTRL); for (i = 0; i < probe_ent->n_ports; i++) { void __iomem *port = port_base + i * PORT_REGS_SIZE; unsigned long portu = (unsigned long)port; - u32 tmp; - int cnt; probe_ent->port[i].cmd_addr = portu + PORT_PRB; probe_ent->port[i].scr_addr = portu + PORT_SCONTROL; @@ -952,18 +1114,20 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) tmp = readl(port + PORT_CTRL_STAT); if (tmp & PORT_CS_PORT_RST) { writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); - readl(port + PORT_CTRL_STAT); /* sync */ - for (cnt = 0; cnt < 10; cnt++) { - msleep(10); - tmp = readl(port + PORT_CTRL_STAT); - if (!(tmp & PORT_CS_PORT_RST)) - break; - } + tmp = ata_wait_register(port + PORT_CTRL_STAT, + PORT_CS_PORT_RST, + PORT_CS_PORT_RST, 10, 100); if (tmp & PORT_CS_PORT_RST) dev_printk(KERN_ERR, &pdev->dev, "failed to clear port RST\n"); } + /* Configure IRQ WoC */ + if (probe_ent->host_flags & SIL24_FLAG_PCIX_IRQ_WOC) + writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT); + else + writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); + /* Zero error counters. */ writel(0x8000, port + PORT_DECODE_ERR_THRESH); writel(0x8000, port + PORT_CRC_ERR_THRESH); @@ -972,26 +1136,11 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) writel(0x0000, port + PORT_CRC_ERR_CNT); writel(0x0000, port + PORT_HSHK_ERR_CNT); - /* FIXME: 32bit activation? */ - writel(0, port + PORT_ACTIVATE_UPPER_ADDR); - writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_STAT); - - /* Configure interrupts */ - writel(0xffff, port + PORT_IRQ_ENABLE_CLR); - writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR | PORT_IRQ_SDB_FIS, - port + PORT_IRQ_ENABLE_SET); - - /* Clear interrupts */ - writel(0x0fff0fff, port + PORT_IRQ_STAT); - writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); + /* Always use 64bit activation */ + writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR); /* Clear port multiplier enable and resume bits */ writel(PORT_CS_PM_EN | PORT_CS_RESUME, port + PORT_CTRL_CLR); - - /* Reset itself */ - if (__sil24_reset_controller(port)) - dev_printk(KERN_ERR, &pdev->dev, - "failed to reset controller\n"); } /* Turn on interrupts */ diff --git a/drivers/scsi/sata_sis.c b/drivers/scsi/sata_sis.c index 728530df2e075..3097821688dc1 100644 --- a/drivers/scsi/sata_sis.c +++ b/drivers/scsi/sata_sis.c @@ -43,7 +43,7 @@ #include <linux/libata.h> #define DRV_NAME "sata_sis" -#define DRV_VERSION "0.5" +#define DRV_VERSION "0.6" enum { sis_180 = 0, diff --git a/drivers/scsi/sata_svw.c b/drivers/scsi/sata_svw.c index 53b0d5c0a61f4..d5eb5375e2655 100644 --- a/drivers/scsi/sata_svw.c +++ b/drivers/scsi/sata_svw.c @@ -54,7 +54,7 @@ #endif /* CONFIG_PPC_OF */ #define DRV_NAME "sata_svw" -#define DRV_VERSION "1.07" +#define DRV_VERSION "1.8" enum { /* Taskfile registers offsets */ @@ -257,7 +257,7 @@ static int k2_sata_proc_info(struct Scsi_Host *shost, char *page, char **start, int len, index; /* Find the ata_port */ - ap = (struct ata_port *) &shost->hostdata[0]; + ap = ata_shost_to_port(shost); if (ap == NULL) return 0; diff --git a/drivers/scsi/sata_sx4.c b/drivers/scsi/sata_sx4.c index 4139ad4b1df06..70a695488291b 100644 --- a/drivers/scsi/sata_sx4.c +++ b/drivers/scsi/sata_sx4.c @@ -46,7 +46,7 @@ #include "sata_promise.h" #define DRV_NAME "sata_sx4" -#define DRV_VERSION "0.8" +#define DRV_VERSION "0.9" enum { @@ -218,7 +218,7 @@ static const struct ata_port_info pdc_port_info[] = { .sht = &pdc_sata_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SRST | ATA_FLAG_MMIO | - ATA_FLAG_NO_ATAPI, + ATA_FLAG_PIO_POLLING, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x7f, /* udma0-6 ; FIXME */ @@ -833,11 +833,11 @@ static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_re tmp = mask & (1 << i); VPRINTK("seq %u, port_no %u, ap %p, tmp %x\n", i, port_no, ap, tmp); if (tmp && ap && - !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) { + !(ap->flags & ATA_FLAG_DISABLED)) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN))) + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) handled += pdc20621_host_intr(ap, qc, (i > 4), mmio_base); } @@ -868,15 +868,16 @@ static void pdc_eng_timeout(struct ata_port *ap) switch (qc->tf.protocol) { case ATA_PROT_DMA: case ATA_PROT_NODATA: - printk(KERN_ERR "ata%u: command timeout\n", ap->id); + ata_port_printk(ap, KERN_ERR, "command timeout\n"); qc->err_mask |= __ac_err_mask(ata_wait_idle(ap)); break; default: drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); - printk(KERN_ERR "ata%u: unknown timeout, cmd 0x%x stat 0x%x\n", - ap->id, qc->tf.command, drv_stat); + ata_port_printk(ap, KERN_ERR, + "unknown timeout, cmd 0x%x stat 0x%x\n", + qc->tf.command, drv_stat); qc->err_mask |= ac_err_mask(drv_stat); break; @@ -1375,10 +1376,6 @@ static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id * if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); - /* - * If this driver happens to only be useful on Apple's K2, then - * we should check that here as it has a normal Serverworks ID - */ rc = pci_enable_device(pdev); if (rc) return rc; diff --git a/drivers/scsi/sata_uli.c b/drivers/scsi/sata_uli.c index 38b52bd3fa3f1..15f81bfc30f0e 100644 --- a/drivers/scsi/sata_uli.c +++ b/drivers/scsi/sata_uli.c @@ -37,7 +37,7 @@ #include <linux/libata.h> #define DRV_NAME "sata_uli" -#define DRV_VERSION "0.5" +#define DRV_VERSION "0.6" enum { uli_5289 = 0, diff --git a/drivers/scsi/sata_via.c b/drivers/scsi/sata_via.c index 9e7ae4e0db324..17aefab5f42fb 100644 --- a/drivers/scsi/sata_via.c +++ b/drivers/scsi/sata_via.c @@ -47,7 +47,7 @@ #include <asm/io.h> #define DRV_NAME "sata_via" -#define DRV_VERSION "1.1" +#define DRV_VERSION "1.2" enum board_ids_enum { vt6420, diff --git a/drivers/scsi/sata_vsc.c b/drivers/scsi/sata_vsc.c index 8a29ce340b472..0372be7ff1c92 100644 --- a/drivers/scsi/sata_vsc.c +++ b/drivers/scsi/sata_vsc.c @@ -221,14 +221,21 @@ static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance, ap = host_set->ports[i]; - if (ap && !(ap->flags & - (ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) { + if (is_vsc_sata_int_err(i, int_status)) { + u32 err_status; + printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__); + err_status = ap ? vsc_sata_scr_read(ap, SCR_ERROR) : 0; + vsc_sata_scr_write(ap, SCR_ERROR, err_status); + handled++; + } + + if (ap && !(ap->flags & ATA_FLAG_DISABLED)) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.ctl & ATA_NIEN))) { + if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) handled += ata_host_intr(ap, qc); - } else if (is_vsc_sata_int_err(i, int_status)) { + else if (is_vsc_sata_int_err(i, int_status)) { /* * On some chips (i.e. Intel 31244), an error * interrupt will sneak in at initialization diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 73994e2ac2cb7..dae4f08adde08 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -720,6 +720,24 @@ void scsi_init_cmd_from_req(struct scsi_cmnd *cmd, struct scsi_request *sreq) static DEFINE_PER_CPU(struct list_head, scsi_done_q); /** + * scsi_req_abort_cmd -- Request command recovery for the specified command + * cmd: pointer to the SCSI command of interest + * + * This function requests that SCSI Core start recovery for the + * command by deleting the timer and adding the command to the eh + * queue. It can be called by either LLDDs or SCSI Core. LLDDs who + * implement their own error recovery MAY ignore the timeout event if + * they generated scsi_req_abort_cmd. + */ +void scsi_req_abort_cmd(struct scsi_cmnd *cmd) +{ + if (!scsi_delete_timer(cmd)) + return; + scsi_times_out(cmd); +} +EXPORT_SYMBOL(scsi_req_abort_cmd); + +/** * scsi_done - Enqueue the finished SCSI command into the done queue. * @cmd: The SCSI Command for which a low-level device driver (LLDD) gives * ownership back to SCSI Core -- i.e. the LLDD has finished with it. diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 1c75646f9689d..346ab72ebf86e 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -58,6 +58,28 @@ void scsi_eh_wakeup(struct Scsi_Host *shost) } /** + * scsi_schedule_eh - schedule EH for SCSI host + * @shost: SCSI host to invoke error handling on. + * + * Schedule SCSI EH without scmd. + **/ +void scsi_schedule_eh(struct Scsi_Host *shost) +{ + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + + if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 || + scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) { + shost->host_eh_scheduled++; + scsi_eh_wakeup(shost); + } + + spin_unlock_irqrestore(shost->host_lock, flags); +} +EXPORT_SYMBOL_GPL(scsi_schedule_eh); + +/** * scsi_eh_scmd_add - add scsi cmd to error handling. * @scmd: scmd to run eh on. * @eh_flag: optional SCSI_EH flag. @@ -1517,7 +1539,7 @@ int scsi_error_handler(void *data) */ set_current_state(TASK_INTERRUPTIBLE); while (!kthread_should_stop()) { - if (shost->host_failed == 0 || + if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) || shost->host_failed != shost->host_busy) { SCSI_LOG_ERROR_RECOVERY(1, printk("Error handler scsi_eh_%d sleeping\n", diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 764a8b375ead1..18e34775b238c 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -566,7 +566,7 @@ void scsi_device_unbusy(struct scsi_device *sdev) spin_lock_irqsave(shost->host_lock, flags); shost->host_busy--; if (unlikely(scsi_host_in_recovery(shost) && - shost->host_failed)) + (shost->host_failed || shost->host_eh_scheduled))) scsi_eh_wakeup(shost); spin_unlock(shost->host_lock); spin_lock(sdev->request_queue->queue_lock); diff --git a/drivers/scsi/scsi_transport_api.h b/drivers/scsi/scsi_transport_api.h new file mode 100644 index 0000000000000..934f0e62bb5c6 --- /dev/null +++ b/drivers/scsi/scsi_transport_api.h @@ -0,0 +1,6 @@ +#ifndef _SCSI_TRANSPORT_API_H +#define _SCSI_TRANSPORT_API_H + +void scsi_schedule_eh(struct Scsi_Host *shost); + +#endif /* _SCSI_TRANSPORT_API_H */ diff --git a/include/linux/ata.h b/include/linux/ata.h index 312a2c0c64e6e..c494e1c0531ef 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -97,6 +97,9 @@ enum { ATA_DRQ = (1 << 3), /* data request i/o */ ATA_ERR = (1 << 0), /* have an error */ ATA_SRST = (1 << 2), /* software reset */ + ATA_ICRC = (1 << 7), /* interface CRC error */ + ATA_UNC = (1 << 6), /* uncorrectable media error */ + ATA_IDNF = (1 << 4), /* ID not found */ ATA_ABORTED = (1 << 2), /* command aborted */ /* ATA command block registers */ @@ -130,6 +133,8 @@ enum { ATA_CMD_WRITE = 0xCA, ATA_CMD_WRITE_EXT = 0x35, ATA_CMD_WRITE_FUA_EXT = 0x3D, + ATA_CMD_FPDMA_READ = 0x60, + ATA_CMD_FPDMA_WRITE = 0x61, ATA_CMD_PIO_READ = 0x20, ATA_CMD_PIO_READ_EXT = 0x24, ATA_CMD_PIO_WRITE = 0x30, @@ -148,6 +153,10 @@ enum { ATA_CMD_INIT_DEV_PARAMS = 0x91, ATA_CMD_READ_NATIVE_MAX = 0xF8, ATA_CMD_READ_NATIVE_MAX_EXT = 0x27, + ATA_CMD_READ_LOG_EXT = 0x2f, + + /* READ_LOG_EXT pages */ + ATA_LOG_SATA_NCQ = 0x10, /* SETFEATURES stuff */ SETFEATURES_XFER = 0x03, @@ -192,6 +201,16 @@ enum { SCR_ACTIVE = 3, SCR_NOTIFICATION = 4, + /* SError bits */ + SERR_DATA_RECOVERED = (1 << 0), /* recovered data error */ + SERR_COMM_RECOVERED = (1 << 1), /* recovered comm failure */ + SERR_DATA = (1 << 8), /* unrecovered data error */ + SERR_PERSISTENT = (1 << 9), /* persistent data/comm error */ + SERR_PROTOCOL = (1 << 10), /* protocol violation */ + SERR_INTERNAL = (1 << 11), /* host internal error */ + SERR_PHYRDY_CHG = (1 << 16), /* PHY RDY changed */ + SERR_DEV_XCHG = (1 << 26), /* device exchanged */ + /* struct ata_taskfile flags */ ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */ ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */ @@ -199,6 +218,7 @@ enum { ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */ ATA_TFLAG_LBA = (1 << 4), /* enable LBA */ ATA_TFLAG_FUA = (1 << 5), /* enable FUA */ + ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */ }; enum ata_tf_protocols { @@ -207,6 +227,7 @@ enum ata_tf_protocols { ATA_PROT_NODATA, /* no data */ ATA_PROT_PIO, /* PIO single sector */ ATA_PROT_DMA, /* DMA */ + ATA_PROT_NCQ, /* NCQ */ ATA_PROT_ATAPI, /* packet command, PIO data xfer*/ ATA_PROT_ATAPI_NODATA, /* packet command, no data */ ATA_PROT_ATAPI_DMA, /* packet command with special DMA sauce */ @@ -262,6 +283,8 @@ struct ata_taskfile { #define ata_id_has_pm(id) ((id)[82] & (1 << 3)) #define ata_id_has_lba(id) ((id)[49] & (1 << 9)) #define ata_id_has_dma(id) ((id)[49] & (1 << 8)) +#define ata_id_has_ncq(id) ((id)[76] & (1 << 8)) +#define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1) #define ata_id_removeable(id) ((id)[0] & (1 << 7)) #define ata_id_has_dword_io(id) ((id)[50] & (1 << 0)) #define ata_id_u32(id,n) \ @@ -272,6 +295,8 @@ struct ata_taskfile { ((u64) (id)[(n) + 1] << 16) | \ ((u64) (id)[(n) + 0]) ) +#define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20) + static inline unsigned int ata_id_major_version(const u16 *id) { unsigned int mver; @@ -311,6 +336,15 @@ static inline int is_atapi_taskfile(const struct ata_taskfile *tf) (tf->protocol == ATA_PROT_ATAPI_DMA); } +static inline int is_multi_taskfile(struct ata_taskfile *tf) +{ + return (tf->command == ATA_CMD_READ_MULTI) || + (tf->command == ATA_CMD_WRITE_MULTI) || + (tf->command == ATA_CMD_READ_MULTI_EXT) || + (tf->command == ATA_CMD_WRITE_MULTI_EXT) || + (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT); +} + static inline int ata_ok(u8 status) { return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR)) diff --git a/include/linux/libata.h b/include/linux/libata.h index b80d2e7fa6d25..c51502c047a4c 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -33,6 +33,7 @@ #include <asm/io.h> #include <linux/ata.h> #include <linux/workqueue.h> +#include <scsi/scsi_host.h> /* * compile-time options: to be removed as soon as all the drivers are @@ -44,7 +45,6 @@ #undef ATA_NDEBUG /* define to disable quick runtime checks */ #undef ATA_ENABLE_PATA /* define to enable PATA support in some * low-level drivers */ -#undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */ /* note: prints function name for you */ @@ -108,8 +108,11 @@ enum { LIBATA_MAX_PRD = ATA_MAX_PRD / 2, ATA_MAX_PORTS = 8, ATA_DEF_QUEUE = 1, - ATA_MAX_QUEUE = 1, + /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ + ATA_MAX_QUEUE = 32, + ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, ATA_MAX_SECTORS = 200, /* FIXME */ + ATA_MAX_SECTORS_LBA48 = 65535, ATA_MAX_BUS = 2, ATA_DEF_BUSY_WAIT = 10000, ATA_SHORT_PAUSE = (HZ >> 6) + 1, @@ -120,9 +123,13 @@ enum { ATA_SHT_USE_CLUSTERING = 1, /* struct ata_device stuff */ - ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */ - ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */ - ATA_DFLAG_LBA = (1 << 2), /* device supports LBA */ + ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ + ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ + ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ + ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ + ATA_DFLAG_CFG_MASK = (1 << 8) - 1, + + ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */ ATA_DEV_UNKNOWN = 0, /* unknown device */ ATA_DEV_ATA = 1, /* ATA device */ @@ -132,43 +139,51 @@ enum { ATA_DEV_NONE = 5, /* no device */ /* struct ata_port flags */ - ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */ + ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ /* (doesn't imply presence) */ - ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */ - ATA_FLAG_SATA = (1 << 3), - ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */ - ATA_FLAG_SRST = (1 << 5), /* (obsolete) use ATA SRST, not E.D.D. */ - ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */ - ATA_FLAG_SATA_RESET = (1 << 7), /* (obsolete) use COMRESET */ - ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */ - ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once - * proper HSM is in place. */ - ATA_FLAG_DEBUGMSG = (1 << 10), - ATA_FLAG_NO_ATAPI = (1 << 11), /* No ATAPI support */ - - ATA_FLAG_SUSPENDED = (1 << 12), /* port is suspended */ - - ATA_FLAG_PIO_LBA48 = (1 << 13), /* Host DMA engine is LBA28 only */ - ATA_FLAG_IRQ_MASK = (1 << 14), /* Mask IRQ in PIO xfers */ - - ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* Flush port task */ - ATA_FLAG_IN_EH = (1 << 16), /* EH in progress */ - - ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */ - ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */ - ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */ + ATA_FLAG_SATA = (1 << 1), + ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ + ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ + ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ + ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ + ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ + ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ + ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ + ATA_FLAG_IRQ_MASK = (1 << 9), /* Mask IRQ in PIO xfers */ + ATA_FLAG_PIO_POLLING = (1 << 10), /* use polling PIO if LLD + * doesn't handle PIO interrupts */ + ATA_FLAG_NCQ = (1 << 11), /* host supports NCQ */ + + ATA_FLAG_DEBUGMSG = (1 << 14), + ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* flush port task */ + + ATA_FLAG_EH_PENDING = (1 << 16), /* EH pending */ + ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */ + ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */ + + ATA_FLAG_DISABLED = (1 << 22), /* port is disabled, ignore it */ + ATA_FLAG_SUSPENDED = (1 << 23), /* port is suspended (power) */ + + /* bits 24:31 of ap->flags are reserved for LLDD specific flags */ + + /* struct ata_queued_cmd flags */ + ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ + ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ + ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, - ATA_QCFLAG_EH_SCHEDULED = (1 << 5), /* EH scheduled */ + ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ + ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ + + ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ + ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ + ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ /* host set flags */ ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */ /* various lengths of time */ - ATA_TMOUT_PIO = 30 * HZ, ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ - ATA_TMOUT_CDB = 30 * HZ, - ATA_TMOUT_CDB_QUICK = 5 * HZ, ATA_TMOUT_INTERNAL = 30 * HZ, ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, @@ -207,21 +222,44 @@ enum { /* size of buffer to pad xfers ending on unaligned boundaries */ ATA_DMA_PAD_SZ = 4, ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, - - /* Masks for port functions */ + + /* masks for port functions */ ATA_PORT_PRIMARY = (1 << 0), ATA_PORT_SECONDARY = (1 << 1), + + /* ering size */ + ATA_ERING_SIZE = 32, + + /* desc_len for ata_eh_info and context */ + ATA_EH_DESC_LEN = 80, + + /* reset / recovery action types */ + ATA_EH_REVALIDATE = (1 << 0), + ATA_EH_SOFTRESET = (1 << 1), + ATA_EH_HARDRESET = (1 << 2), + + ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, + + /* ata_eh_info->flags */ + ATA_EHI_DID_RESET = (1 << 0), /* already reset this port */ + + /* max repeat if error condition is still set after ->error_handler */ + ATA_EH_MAX_REPEAT = 5, + + /* how hard are we gonna try to probe/recover devices */ + ATA_PROBE_MAX_TRIES = 3, + ATA_EH_RESET_TRIES = 3, + ATA_EH_DEV_TRIES = 3, }; enum hsm_task_states { - HSM_ST_UNKNOWN, - HSM_ST_IDLE, - HSM_ST_POLL, - HSM_ST_TMOUT, - HSM_ST, - HSM_ST_LAST, - HSM_ST_LAST_POLL, - HSM_ST_ERR, + HSM_ST_UNKNOWN, /* state unknown */ + HSM_ST_IDLE, /* no command on going */ + HSM_ST, /* (waiting the device to) transfer data */ + HSM_ST_LAST, /* (waiting the device to) complete command */ + HSM_ST_ERR, /* error */ + HSM_ST_FIRST, /* (waiting the device to) + write CDB or first data block */ }; enum ata_completion_errors { @@ -245,7 +283,7 @@ struct ata_queued_cmd; /* typedefs */ typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); typedef void (*ata_probeinit_fn_t)(struct ata_port *); -typedef int (*ata_reset_fn_t)(struct ata_port *, int, unsigned int *); +typedef int (*ata_reset_fn_t)(struct ata_port *, unsigned int *); typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *); struct ata_ioports { @@ -336,7 +374,7 @@ struct ata_queued_cmd { struct scatterlist *__sg; unsigned int err_mask; - + struct ata_taskfile result_tf; ata_qc_cb_t complete_fn; void *private_data; @@ -348,12 +386,24 @@ struct ata_host_stats { unsigned long rw_reqbuf; }; +struct ata_ering_entry { + int is_io; + unsigned int err_mask; + u64 timestamp; +}; + +struct ata_ering { + int cursor; + struct ata_ering_entry ring[ATA_ERING_SIZE]; +}; + struct ata_device { + struct ata_port *ap; u64 n_sectors; /* size of device, if ATA */ unsigned long flags; /* ATA_DFLAG_xxx */ unsigned int class; /* ATA_DEV_xxx */ unsigned int devno; /* 0 or 1 */ - u16 *id; /* IDENTIFY xxx DEVICE data */ + u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ u8 pio_mode; u8 dma_mode; u8 xfer_mode; @@ -373,6 +423,24 @@ struct ata_device { u16 cylinders; /* Number of cylinders */ u16 heads; /* Number of heads */ u16 sectors; /* Number of sectors per track */ + + /* error history */ + struct ata_ering ering; +}; + +struct ata_eh_info { + struct ata_device *dev; /* offending device */ + u32 serror; /* SError from LLDD */ + unsigned int err_mask; /* port-wide err_mask */ + unsigned int action; /* ATA_EH_* action mask */ + unsigned int flags; /* ATA_EHI_* flags */ + char desc[ATA_EH_DESC_LEN]; + int desc_len; +}; + +struct ata_eh_context { + struct ata_eh_info i; + int tries[ATA_MAX_DEVICES]; }; struct ata_port { @@ -397,12 +465,21 @@ struct ata_port { unsigned int mwdma_mask; unsigned int udma_mask; unsigned int cbl; /* cable type; ATA_CBL_xxx */ + unsigned int sata_spd_limit; /* SATA PHY speed limit */ + + /* record runtime error info, protected by host_set lock */ + struct ata_eh_info eh_info; + /* EH context owned by EH */ + struct ata_eh_context eh_context; struct ata_device device[ATA_MAX_DEVICES]; struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; - unsigned long qactive; + unsigned long qc_allocated; + unsigned int qc_active; + unsigned int active_tag; + u32 sactive; struct ata_host_stats stats; struct ata_host_set *host_set; @@ -411,12 +488,13 @@ struct ata_port { struct work_struct port_task; unsigned int hsm_task_state; - unsigned long pio_task_timeout; u32 msg_enable; struct list_head eh_done_q; void *private_data; + + u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ }; struct ata_port_operations { @@ -450,7 +528,15 @@ struct ata_port_operations { void (*qc_prep) (struct ata_queued_cmd *qc); unsigned int (*qc_issue) (struct ata_queued_cmd *qc); - void (*eng_timeout) (struct ata_port *ap); + /* Error handlers. ->error_handler overrides ->eng_timeout and + * indicates that new-style EH is in place. + */ + void (*eng_timeout) (struct ata_port *ap); /* obsolete */ + + void (*freeze) (struct ata_port *ap); + void (*thaw) (struct ata_port *ap); + void (*error_handler) (struct ata_port *ap); + void (*post_internal_cmd) (struct ata_queued_cmd *qc); irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); void (*irq_clear) (struct ata_port *); @@ -496,18 +582,16 @@ extern void ata_port_probe(struct ata_port *); extern void __sata_phy_reset(struct ata_port *ap); extern void sata_phy_reset(struct ata_port *ap); extern void ata_bus_reset(struct ata_port *ap); +extern int sata_set_spd(struct ata_port *ap); extern int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit, ata_reset_fn_t softreset, ata_reset_fn_t hardreset, ata_postreset_fn_t postreset, unsigned int *classes); extern void ata_std_probeinit(struct ata_port *ap); -extern int ata_std_softreset(struct ata_port *ap, int verbose, - unsigned int *classes); -extern int sata_std_hardreset(struct ata_port *ap, int verbose, - unsigned int *class); +extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); +extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); -extern int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev, - int post_reset); +extern int ata_dev_revalidate(struct ata_device *dev, int post_reset); extern void ata_port_disable(struct ata_port *); extern void ata_std_ports(struct ata_ioports *ioaddr); #ifdef CONFIG_PCI @@ -523,20 +607,27 @@ extern void ata_host_set_remove(struct ata_host_set *host_set); extern int ata_scsi_detect(struct scsi_host_template *sht); extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); -extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); -extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); extern int ata_scsi_release(struct Scsi_Host *host); extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); +extern int sata_scr_valid(struct ata_port *ap); +extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); +extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); +extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); +extern int ata_port_online(struct ata_port *ap); +extern int ata_port_offline(struct ata_port *ap); extern int ata_scsi_device_resume(struct scsi_device *); extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state); -extern int ata_device_resume(struct ata_port *, struct ata_device *); -extern int ata_device_suspend(struct ata_port *, struct ata_device *, pm_message_t state); +extern int ata_device_resume(struct ata_device *); +extern int ata_device_suspend(struct ata_device *, pm_message_t state); extern int ata_ratelimit(void); extern unsigned int ata_busy_sleep(struct ata_port *ap, unsigned long timeout_pat, unsigned long timeout); extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data, unsigned long delay); +extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, + unsigned long interval_msec, + unsigned long timeout_msec); /* * Default driver ops implementations @@ -572,17 +663,26 @@ extern void ata_bmdma_start (struct ata_queued_cmd *qc); extern void ata_bmdma_stop(struct ata_queued_cmd *qc); extern u8 ata_bmdma_status(struct ata_port *ap); extern void ata_bmdma_irq_clear(struct ata_port *ap); -extern void __ata_qc_complete(struct ata_queued_cmd *qc); -extern void ata_eng_timeout(struct ata_port *ap); -extern void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev, - struct scsi_cmnd *cmd, +extern void ata_bmdma_freeze(struct ata_port *ap); +extern void ata_bmdma_thaw(struct ata_port *ap); +extern void ata_bmdma_drive_eh(struct ata_port *ap, + ata_reset_fn_t softreset, + ata_reset_fn_t hardreset, + ata_postreset_fn_t postreset); +extern void ata_bmdma_error_handler(struct ata_port *ap); +extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); +extern void ata_qc_complete(struct ata_queued_cmd *qc); +extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, + void (*finish_qc)(struct ata_queued_cmd *)); +extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); extern int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]); extern int ata_scsi_slave_config(struct scsi_device *sdev); -extern struct ata_device *ata_dev_pair(struct ata_port *ap, - struct ata_device *adev); +extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, + int queue_depth); +extern struct ata_device *ata_dev_pair(struct ata_device *adev); /* * Timing helpers @@ -628,7 +728,50 @@ extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bit extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long); #endif /* CONFIG_PCI */ +/* + * EH + */ +extern void ata_eng_timeout(struct ata_port *ap); + +extern void ata_port_schedule_eh(struct ata_port *ap); +extern int ata_port_abort(struct ata_port *ap); +extern int ata_port_freeze(struct ata_port *ap); + +extern void ata_eh_freeze_port(struct ata_port *ap); +extern void ata_eh_thaw_port(struct ata_port *ap); + +extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); +extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); + +extern void ata_do_eh(struct ata_port *ap, ata_reset_fn_t softreset, + ata_reset_fn_t hardreset, ata_postreset_fn_t postreset); + +/* + * printk helpers + */ +#define ata_port_printk(ap, lv, fmt, args...) \ + printk(lv"ata%u: "fmt, (ap)->id , ##args) + +#define ata_dev_printk(dev, lv, fmt, args...) \ + printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args) + +/* + * ata_eh_info helpers + */ +#define ata_ehi_push_desc(ehi, fmt, args...) do { \ + (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ + ATA_EH_DESC_LEN - (ehi)->desc_len, \ + fmt , ##args); \ +} while (0) + +#define ata_ehi_clear_desc(ehi) do { \ + (ehi)->desc[0] = '\0'; \ + (ehi)->desc_len = 0; \ +} while (0) +/* + * qc helpers + */ static inline int ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) { @@ -671,14 +814,39 @@ static inline unsigned int ata_tag_valid(unsigned int tag) return (tag < ATA_MAX_QUEUE) ? 1 : 0; } -static inline unsigned int ata_class_present(unsigned int class) +static inline unsigned int ata_tag_internal(unsigned int tag) +{ + return tag == ATA_MAX_QUEUE - 1; +} + +static inline unsigned int ata_class_enabled(unsigned int class) { return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; } -static inline unsigned int ata_dev_present(const struct ata_device *dev) +static inline unsigned int ata_class_disabled(unsigned int class) +{ + return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; +} + +static inline unsigned int ata_class_absent(unsigned int class) +{ + return !ata_class_enabled(class) && !ata_class_disabled(class); +} + +static inline unsigned int ata_dev_enabled(const struct ata_device *dev) +{ + return ata_class_enabled(dev->class); +} + +static inline unsigned int ata_dev_disabled(const struct ata_device *dev) +{ + return ata_class_disabled(dev->class); +} + +static inline unsigned int ata_dev_absent(const struct ata_device *dev) { - return ata_class_present(dev->class); + return ata_class_absent(dev->class); } static inline u8 ata_chk_status(struct ata_port *ap) @@ -759,20 +927,35 @@ static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) qc->tf.ctl |= ATA_NIEN; } -static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, - unsigned int tag) +static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, + unsigned int tag) { if (likely(ata_tag_valid(tag))) return &ap->qcmd[tag]; return NULL; } -static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) +static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, + unsigned int tag) +{ + struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); + + if (unlikely(!qc) || !ap->ops->error_handler) + return qc; + + if ((qc->flags & (ATA_QCFLAG_ACTIVE | + ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) + return qc; + + return NULL; +} + +static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) { memset(tf, 0, sizeof(*tf)); - tf->ctl = ap->ctl; - if (device == 0) + tf->ctl = dev->ap->ctl; + if (dev->devno == 0) tf->device = ATA_DEVICE_OBS; else tf->device = ATA_DEVICE_OBS | ATA_DEV1; @@ -787,26 +970,11 @@ static inline void ata_qc_reinit(struct ata_queued_cmd *qc) qc->nbytes = qc->curbytes = 0; qc->err_mask = 0; - ata_tf_init(qc->ap, &qc->tf, qc->dev->devno); -} - -/** - * ata_qc_complete - Complete an active ATA command - * @qc: Command to complete - * @err_mask: ATA Status register contents - * - * Indicate to the mid and upper layers that an ATA - * command has completed, with either an ok or not-ok status. - * - * LOCKING: - * spin_lock_irqsave(host_set lock) - */ -static inline void ata_qc_complete(struct ata_queued_cmd *qc) -{ - if (unlikely(qc->flags & ATA_QCFLAG_EH_SCHEDULED)) - return; + ata_tf_init(qc->dev, &qc->tf); - __ata_qc_complete(qc); + /* init result_tf such that it indicates normal completion */ + qc->result_tf.command = ATA_DRDY; + qc->result_tf.feature = 0; } /** @@ -885,28 +1053,6 @@ static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) return status; } -static inline u32 scr_read(struct ata_port *ap, unsigned int reg) -{ - return ap->ops->scr_read(ap, reg); -} - -static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) -{ - ap->ops->scr_write(ap, reg, val); -} - -static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, - u32 val) -{ - ap->ops->scr_write(ap, reg, val); - (void) ap->ops->scr_read(ap, reg); -} - -static inline unsigned int sata_dev_present(struct ata_port *ap) -{ - return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; -} - static inline int ata_try_flush_cache(const struct ata_device *dev) { return ata_id_wcache_enabled(dev->id) || @@ -916,7 +1062,7 @@ static inline int ata_try_flush_cache(const struct ata_device *dev) static inline unsigned int ac_err_mask(u8 status) { - if (status & ATA_BUSY) + if (status & (ATA_BUSY | ATA_DRQ)) return AC_ERR_HSM; if (status & (ATA_ERR | ATA_DF)) return AC_ERR_DEV; @@ -944,4 +1090,9 @@ static inline void ata_pad_free(struct ata_port *ap, struct device *dev) dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); } +static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) +{ + return (struct ata_port *) &host->hostdata[0]; +} + #endif /* __LINUX_LIBATA_H__ */ diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 1ace1b9fe5373..88c6c4da6c054 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -151,5 +151,6 @@ extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, gfp_t); extern void scsi_put_command(struct scsi_cmnd *); extern void scsi_io_completion(struct scsi_cmnd *, unsigned int, unsigned int); extern void scsi_finish_command(struct scsi_cmnd *cmd); +extern void scsi_req_abort_cmd(struct scsi_cmnd *cmd); #endif /* _SCSI_SCSI_CMND_H */ diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index de6ce541a046c..a42efd6e4be88 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -472,6 +472,7 @@ struct Scsi_Host { */ unsigned int host_busy; /* commands actually active on low-level */ unsigned int host_failed; /* commands that failed. */ + unsigned int host_eh_scheduled; /* EH scheduled without command */ unsigned short host_no; /* Used for IOCTL_GET_IDLUN, /proc/scsi et al. */ int resetting; /* if set, it means that last_reset is a valid value */ |