diff options
Diffstat (limited to 'drivers/ata/libata-eh.c')
| -rw-r--r-- | drivers/ata/libata-eh.c | 142 |
1 files changed, 116 insertions, 26 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index c1db2f234d2e..99037a4860d9 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -1756,7 +1756,7 @@ static unsigned int ata_eh_speed_down_verdict(struct ata_device *dev) static unsigned int ata_eh_speed_down(struct ata_device *dev, unsigned int eflags, unsigned int err_mask) { - struct ata_link *link = dev->link; + struct ata_link *link = ata_dev_phys_link(dev); int xfer_ok = 0; unsigned int verdict; unsigned int action = 0; @@ -1880,7 +1880,8 @@ static void ata_eh_link_autopsy(struct ata_link *link) 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->dev->link != link) + if (!(qc->flags & ATA_QCFLAG_FAILED) || + ata_dev_phys_link(qc->dev) != link) continue; /* inherit upper level err_mask */ @@ -1967,6 +1968,23 @@ void ata_eh_autopsy(struct ata_port *ap) ata_port_for_each_link(link, ap) ata_eh_link_autopsy(link); + /* Handle the frigging slave link. Autopsy is done similarly + * but actions and flags are transferred over to the master + * link and handled from there. + */ + if (ap->slave_link) { + struct ata_eh_context *mehc = &ap->link.eh_context; + struct ata_eh_context *sehc = &ap->slave_link->eh_context; + + ata_eh_link_autopsy(ap->slave_link); + + ata_eh_about_to_do(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); + mehc->i.action |= sehc->i.action; + mehc->i.dev_action[1] |= sehc->i.dev_action[1]; + mehc->i.flags |= sehc->i.flags; + ata_eh_done(ap->slave_link, NULL, ATA_EH_ALL_ACTIONS); + } + /* Autopsy of fanout ports can affect host link autopsy. * Perform host link autopsy last. */ @@ -2001,7 +2019,8 @@ static void ata_eh_link_report(struct ata_link *link) 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->dev->link != link || + if (!(qc->flags & ATA_QCFLAG_FAILED) || + ata_dev_phys_link(qc->dev) != link || ((qc->flags & ATA_QCFLAG_QUIET) && qc->err_mask == AC_ERR_DEV)) continue; @@ -2068,7 +2087,7 @@ static void ata_eh_link_report(struct ata_link *link) char cdb_buf[70] = ""; if (!(qc->flags & ATA_QCFLAG_FAILED) || - qc->dev->link != link || !qc->err_mask) + ata_dev_phys_link(qc->dev) != link || !qc->err_mask) continue; if (qc->dma_dir != DMA_NONE) { @@ -2160,12 +2179,14 @@ void ata_eh_report(struct ata_port *ap) } static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset, - unsigned int *classes, unsigned long deadline) + unsigned int *classes, unsigned long deadline, + bool clear_classes) { struct ata_device *dev; - ata_link_for_each_dev(dev, link) - classes[dev->devno] = ATA_DEV_UNKNOWN; + if (clear_classes) + ata_link_for_each_dev(dev, link) + classes[dev->devno] = ATA_DEV_UNKNOWN; return reset(link, classes, deadline); } @@ -2187,17 +2208,20 @@ int ata_eh_reset(struct ata_link *link, int classify, ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) { struct ata_port *ap = link->ap; + struct ata_link *slave = ap->slave_link; struct ata_eh_context *ehc = &link->eh_context; + struct ata_eh_context *sehc = &slave->eh_context; unsigned int *classes = ehc->classes; unsigned int lflags = link->flags; int verbose = !(ehc->i.flags & ATA_EHI_QUIET); int max_tries = 0, try = 0; + struct ata_link *failed_link; struct ata_device *dev; unsigned long deadline, now; ata_reset_fn_t reset; unsigned long flags; u32 sstatus; - int nr_known, rc; + int nr_unknown, rc; /* * Prepare to reset @@ -2252,8 +2276,30 @@ int ata_eh_reset(struct ata_link *link, int classify, } if (prereset) { - rc = prereset(link, - ata_deadline(jiffies, ATA_EH_PRERESET_TIMEOUT)); + unsigned long deadline = ata_deadline(jiffies, + ATA_EH_PRERESET_TIMEOUT); + + if (slave) { + sehc->i.action &= ~ATA_EH_RESET; + sehc->i.action |= ehc->i.action; + } + + rc = prereset(link, deadline); + + /* If present, do prereset on slave link too. Reset + * is skipped iff both master and slave links report + * -ENOENT or clear ATA_EH_RESET. + */ + if (slave && (rc == 0 || rc == -ENOENT)) { + int tmp; + + tmp = prereset(slave, deadline); + if (tmp != -ENOENT) + rc = tmp; + + ehc->i.action |= sehc->i.action; + } + if (rc) { if (rc == -ENOENT) { ata_link_printk(link, KERN_DEBUG, @@ -2302,25 +2348,51 @@ int ata_eh_reset(struct ata_link *link, int classify, else ehc->i.flags |= ATA_EHI_DID_SOFTRESET; - rc = ata_do_reset(link, reset, classes, deadline); - if (rc && rc != -EAGAIN) + rc = ata_do_reset(link, reset, classes, deadline, true); + if (rc && rc != -EAGAIN) { + failed_link = link; goto fail; + } + + /* hardreset slave link if existent */ + if (slave && reset == hardreset) { + int tmp; + + if (verbose) + ata_link_printk(slave, KERN_INFO, + "hard resetting link\n"); + ata_eh_about_to_do(slave, NULL, ATA_EH_RESET); + tmp = ata_do_reset(slave, reset, classes, deadline, + false); + switch (tmp) { + case -EAGAIN: + rc = -EAGAIN; + case 0: + break; + default: + failed_link = slave; + rc = tmp; + goto fail; + } + } + + /* perform follow-up SRST if necessary */ if (reset == hardreset && ata_eh_followup_srst_needed(link, rc, classes)) { - /* okay, let's do follow-up softreset */ reset = softreset; if (!reset) { ata_link_printk(link, KERN_ERR, "follow-up softreset required " "but no softreset avaliable\n"); + failed_link = link; rc = -EINVAL; goto fail; } ata_eh_about_to_do(link, NULL, ATA_EH_RESET); - rc = ata_do_reset(link, reset, classes, deadline); + rc = ata_do_reset(link, reset, classes, deadline, true); } } else { if (verbose) @@ -2341,7 +2413,7 @@ int ata_eh_reset(struct ata_link *link, int classify, dev->pio_mode = XFER_PIO_0; dev->flags &= ~ATA_DFLAG_SLEEPING; - if (ata_link_offline(link)) + if (ata_phys_link_offline(ata_dev_phys_link(dev))) continue; /* apply class override */ @@ -2354,6 +2426,8 @@ int ata_eh_reset(struct ata_link *link, int classify, /* record current link speed */ if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0) link->sata_spd = (sstatus >> 4) & 0xf; + if (slave && sata_scr_read(slave, SCR_STATUS, &sstatus) == 0) + slave->sata_spd = (sstatus >> 4) & 0xf; /* thaw the port */ if (ata_is_host_link(link)) @@ -2366,12 +2440,17 @@ int ata_eh_reset(struct ata_link *link, int classify, * reset and here. This race is mediated by cross checking * link onlineness and classification result later. */ - if (postreset) + if (postreset) { postreset(link, classes); + if (slave) + postreset(slave, classes); + } /* clear cached SError */ spin_lock_irqsave(link->ap->lock, flags); link->eh_info.serror = 0; + if (slave) + slave->eh_info.serror = 0; spin_unlock_irqrestore(link->ap->lock, flags); /* Make sure onlineness and classification result correspond. @@ -2381,19 +2460,21 @@ int ata_eh_reset(struct ata_link *link, int classify, * link onlineness and classification result, those conditions * can be reliably detected and retried. */ - nr_known = 0; + nr_unknown = 0; ata_link_for_each_dev(dev, link) { /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */ - if (classes[dev->devno] == ATA_DEV_UNKNOWN) + if (classes[dev->devno] == ATA_DEV_UNKNOWN) { classes[dev->devno] = ATA_DEV_NONE; - else - nr_known++; + if (ata_phys_link_online(ata_dev_phys_link(dev))) + nr_unknown++; + } } - if (classify && !nr_known && ata_link_online(link)) { + if (classify && nr_unknown) { if (try < max_tries) { ata_link_printk(link, KERN_WARNING, "link online but " "device misclassified, retrying\n"); + failed_link = link; rc = -EAGAIN; goto fail; } @@ -2404,6 +2485,8 @@ int ata_eh_reset(struct ata_link *link, int classify, /* reset successful, schedule revalidation */ ata_eh_done(link, NULL, ATA_EH_RESET); + if (slave) + ata_eh_done(slave, NULL, ATA_EH_RESET); ehc->last_reset = jiffies; ehc->i.action |= ATA_EH_REVALIDATE; @@ -2411,6 +2494,8 @@ int ata_eh_reset(struct ata_link *link, int classify, out: /* clear hotplug flag */ ehc->i.flags &= ~ATA_EHI_HOTPLUGGED; + if (slave) + sehc->i.flags &= ~ATA_EHI_HOTPLUGGED; spin_lock_irqsave(ap->lock, flags); ap->pflags &= ~ATA_PFLAG_RESETTING; @@ -2431,7 +2516,7 @@ int ata_eh_reset(struct ata_link *link, int classify, if (time_before(now, deadline)) { unsigned long delta = deadline - now; - ata_link_printk(link, KERN_WARNING, + ata_link_printk(failed_link, KERN_WARNING, "reset failed (errno=%d), retrying in %u secs\n", rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000)); @@ -2439,8 +2524,13 @@ int ata_eh_reset(struct ata_link *link, int classify, delta = schedule_timeout_uninterruptible(delta); } - if (rc == -EPIPE || try == max_tries - 1) + if (try == max_tries - 1) { sata_down_spd_limit(link); + if (slave) + sata_down_spd_limit(slave); + } else if (rc == -EPIPE) + sata_down_spd_limit(failed_link); + if (hardreset) reset = hardreset; goto retry; @@ -2472,7 +2562,7 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link, if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { WARN_ON(dev->class == ATA_DEV_PMP); - if (ata_link_offline(link)) { + if (ata_phys_link_offline(ata_dev_phys_link(dev))) { rc = -EIO; goto err; } @@ -2697,7 +2787,7 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) /* This is the last chance, better to slow * down than lose it. */ - sata_down_spd_limit(dev->link); + sata_down_spd_limit(ata_dev_phys_link(dev)); ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); } } @@ -2707,7 +2797,7 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) ata_dev_disable(dev); /* detach if offline */ - if (ata_link_offline(dev->link)) + if (ata_phys_link_offline(ata_dev_phys_link(dev))) ata_eh_detach_dev(dev); /* schedule probe if necessary */ |