ATA_ECAT_DUBIOUS_TOUT_HSM = 6,
ATA_ECAT_DUBIOUS_UNK_DEV = 7,
ATA_ECAT_NR = 8,
-};
-/* Waiting in ->prereset can never be reliable. It's sometimes nice
- * to wait there but it can't be depended upon; otherwise, we wouldn't
- * be resetting. Just give it enough time for most drives to spin up.
- */
-enum {
- ATA_EH_PRERESET_TIMEOUT = 10 * HZ,
- ATA_EH_FASTDRAIN_INTERVAL = 3 * HZ,
+ ATA_EH_CMD_DFL_TIMEOUT = 5000,
+
+ /* always put at least this amount of time between resets */
+ ATA_EH_RESET_COOL_DOWN = 5000,
+
+ /* Waiting in ->prereset can never be reliable. It's
+ * sometimes nice to wait there but it can't be depended upon;
+ * otherwise, we wouldn't be resetting. Just give it enough
+ * time for most drives to spin up.
+ */
+ ATA_EH_PRERESET_TIMEOUT = 10000,
+ ATA_EH_FASTDRAIN_INTERVAL = 3000,
};
/* The following table determines how we sequence resets. Each entry
* are mostly for error handling, hotplug and retarded devices.
*/
static const unsigned long ata_eh_reset_timeouts[] = {
- 10 * HZ, /* most drives spin up by 10sec */
- 10 * HZ, /* > 99% working drives spin up before 20sec */
- 35 * HZ, /* give > 30 secs of idleness for retarded devices */
- 5 * HZ, /* and sweet one last chance */
- /* > 1 min has elapsed, give up */
+ 10000, /* most drives spin up by 10sec */
+ 10000, /* > 99% working drives spin up before 20sec */
+ 35000, /* give > 30 secs of idleness for retarded devices */
+ 5000, /* and sweet one last chance */
+ ULONG_MAX, /* > 1 min has elapsed, give up */
+};
+
+static const unsigned long ata_eh_identify_timeouts[] = {
+ 5000, /* covers > 99% of successes and not too boring on failures */
+ 10000, /* combined time till here is enough even for media access */
+ 30000, /* for true idiots */
+ ULONG_MAX,
+};
+
+static const unsigned long ata_eh_other_timeouts[] = {
+ 5000, /* same rationale as identify timeout */
+ 10000, /* ditto */
+ /* but no merciful 30sec for other commands, it just isn't worth it */
+ ULONG_MAX,
};
+struct ata_eh_cmd_timeout_ent {
+ const u8 *commands;
+ const unsigned long *timeouts;
+};
+
+/* The following table determines timeouts to use for EH internal
+ * commands. Each table entry is a command class and matches the
+ * commands the entry applies to and the timeout table to use.
+ *
+ * On the retry after a command timed out, the next timeout value from
+ * the table is used. If the table doesn't contain further entries,
+ * the last value is used.
+ *
+ * ehc->cmd_timeout_idx keeps track of which timeout to use per
+ * command class, so if SET_FEATURES times out on the first try, the
+ * next try will use the second timeout value only for that class.
+ */
+#define CMDS(cmds...) (const u8 []){ cmds, 0 }
+static const struct ata_eh_cmd_timeout_ent
+ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = {
+ { .commands = CMDS(ATA_CMD_ID_ATA, ATA_CMD_ID_ATAPI),
+ .timeouts = ata_eh_identify_timeouts, },
+ { .commands = CMDS(ATA_CMD_READ_NATIVE_MAX, ATA_CMD_READ_NATIVE_MAX_EXT),
+ .timeouts = ata_eh_other_timeouts, },
+ { .commands = CMDS(ATA_CMD_SET_MAX, ATA_CMD_SET_MAX_EXT),
+ .timeouts = ata_eh_other_timeouts, },
+ { .commands = CMDS(ATA_CMD_SET_FEATURES),
+ .timeouts = ata_eh_other_timeouts, },
+ { .commands = CMDS(ATA_CMD_INIT_DEV_PARAMS),
+ .timeouts = ata_eh_other_timeouts, },
+};
+#undef CMDS
+
static void __ata_port_freeze(struct ata_port *ap);
#ifdef CONFIG_PM
static void ata_eh_handle_port_suspend(struct ata_port *ap);
#endif /* CONFIG_PCI */
+static int ata_lookup_timeout_table(u8 cmd)
+{
+ int i;
+
+ for (i = 0; i < ATA_EH_CMD_TIMEOUT_TABLE_SIZE; i++) {
+ const u8 *cur;
+
+ for (cur = ata_eh_cmd_timeout_table[i].commands; *cur; cur++)
+ if (*cur == cmd)
+ return i;
+ }
+
+ return -1;
+}
+
+/**
+ * ata_internal_cmd_timeout - determine timeout for an internal command
+ * @dev: target device
+ * @cmd: internal command to be issued
+ *
+ * Determine timeout for internal command @cmd for @dev.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * Determined timeout.
+ */
+unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd)
+{
+ struct ata_eh_context *ehc = &dev->link->eh_context;
+ int ent = ata_lookup_timeout_table(cmd);
+ int idx;
+
+ if (ent < 0)
+ return ATA_EH_CMD_DFL_TIMEOUT;
+
+ idx = ehc->cmd_timeout_idx[dev->devno][ent];
+ return ata_eh_cmd_timeout_table[ent].timeouts[idx];
+}
+
+/**
+ * ata_internal_cmd_timed_out - notification for internal command timeout
+ * @dev: target device
+ * @cmd: internal command which timed out
+ *
+ * Notify EH that internal command @cmd for @dev timed out. This
+ * function should be called only for commands whose timeouts are
+ * determined using ata_internal_cmd_timeout().
+ *
+ * LOCKING:
+ * EH context.
+ */
+void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd)
+{
+ struct ata_eh_context *ehc = &dev->link->eh_context;
+ int ent = ata_lookup_timeout_table(cmd);
+ int idx;
+
+ if (ent < 0)
+ return;
+
+ idx = ehc->cmd_timeout_idx[dev->devno][ent];
+ if (ata_eh_cmd_timeout_table[ent].timeouts[idx + 1] != ULONG_MAX)
+ ehc->cmd_timeout_idx[dev->devno][ent]++;
+}
+
static void ata_ering_record(struct ata_ering *ering, unsigned int eflags,
unsigned int err_mask)
{
if (ata_ncq_enabled(dev))
ehc->saved_ncq_enabled |= 1 << devno;
}
+
+ /* set last reset timestamp to some time in the past */
+ ehc->last_reset = jiffies - 60 * HZ;
}
ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS;
/* some qcs have finished, give it another chance */
ap->fastdrain_cnt = cnt;
ap->fastdrain_timer.expires =
- jiffies + ATA_EH_FASTDRAIN_INTERVAL;
+ ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL);
add_timer(&ap->fastdrain_timer);
}
/* activate fast drain */
ap->fastdrain_cnt = cnt;
- ap->fastdrain_timer.expires = jiffies + ATA_EH_FASTDRAIN_INTERVAL;
+ ap->fastdrain_timer.expires =
+ ata_deadline(jiffies, ATA_EH_FASTDRAIN_INTERVAL);
add_timer(&ap->fastdrain_timer);
}
unsigned int err_mask = 0, action = 0;
u32 hotplug_mask;
- if (serror & SERR_PERSISTENT) {
- err_mask |= AC_ERR_ATA_BUS;
- action |= ATA_EH_RESET;
- }
- if (serror &
- (SERR_DATA_RECOVERED | SERR_COMM_RECOVERED | SERR_DATA)) {
+ if (serror & (SERR_PERSISTENT | SERR_DATA)) {
err_mask |= AC_ERR_ATA_BUS;
action |= ATA_EH_RESET;
}
* LOCKING:
* Kernel thread context (may sleep).
*/
-static void ata_eh_analyze_ncq_error(struct ata_link *link)
+void ata_eh_analyze_ncq_error(struct ata_link *link)
{
struct ata_port *ap = link->ap;
struct ata_eh_context *ehc = &link->eh_context;
unsigned int *classes, unsigned long deadline)
{
struct ata_device *dev;
- int rc;
ata_link_for_each_dev(dev, link)
classes[dev->devno] = ATA_DEV_UNKNOWN;
- rc = reset(link, classes, deadline);
-
- /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */
- ata_link_for_each_dev(dev, link)
- if (classes[dev->devno] == ATA_DEV_UNKNOWN)
- classes[dev->devno] = ATA_DEV_NONE;
-
- return rc;
+ return reset(link, classes, deadline);
}
static int ata_eh_followup_srst_needed(struct ata_link *link,
ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
{
- const int max_tries = ARRAY_SIZE(ata_eh_reset_timeouts);
struct ata_port *ap = link->ap;
struct ata_eh_context *ehc = &link->eh_context;
unsigned int *classes = ehc->classes;
unsigned int lflags = link->flags;
int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
- int try = 0;
+ int max_tries = 0, try = 0;
struct ata_device *dev;
unsigned long deadline, now;
ata_reset_fn_t reset;
unsigned long flags;
u32 sstatus;
- int rc;
+ int nr_known, rc;
+
+ /*
+ * Prepare to reset
+ */
+ while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX)
+ max_tries++;
+
+ now = jiffies;
+ deadline = ata_deadline(ehc->last_reset, ATA_EH_RESET_COOL_DOWN);
+ if (time_before(now, deadline))
+ schedule_timeout_uninterruptible(deadline - now);
- /* about to reset */
spin_lock_irqsave(ap->lock, flags);
ap->pflags |= ATA_PFLAG_RESETTING;
spin_unlock_irqrestore(ap->lock, flags);
ata_eh_about_to_do(link, NULL, ATA_EH_RESET);
+ ehc->last_reset = jiffies;
ata_link_for_each_dev(dev, link) {
/* If we issue an SRST then an ATA drive (not ATAPI)
ap->ops->set_piomode(ap, dev);
}
- if (!softreset && !hardreset) {
- if (verbose)
- ata_link_printk(link, KERN_INFO, "no reset method "
- "available, skipping reset\n");
- if (!(lflags & ATA_LFLAG_ASSUME_CLASS))
- lflags |= ATA_LFLAG_ASSUME_ATA;
- goto done;
- }
-
/* prefer hardreset */
+ reset = NULL;
ehc->i.action &= ~ATA_EH_RESET;
if (hardreset) {
reset = hardreset;
} else if (softreset) {
reset = softreset;
ehc->i.action = ATA_EH_SOFTRESET;
- } else {
- ata_link_printk(link, KERN_ERR, "BUG: no reset method, "
- "please report to linux-ide@vger.kernel.org\n");
- dump_stack();
- return -EINVAL;
}
if (prereset) {
- rc = prereset(link, jiffies + ATA_EH_PRERESET_TIMEOUT);
+ rc = prereset(link,
+ ata_deadline(jiffies, ATA_EH_PRERESET_TIMEOUT));
if (rc) {
if (rc == -ENOENT) {
ata_link_printk(link, KERN_DEBUG,
"prereset failed (errno=%d)\n", rc);
goto out;
}
- }
- /* prereset() might have cleared ATA_EH_RESET */
- if (!(ehc->i.action & ATA_EH_RESET)) {
- /* prereset told us not to reset, bang classes and return */
- ata_link_for_each_dev(dev, link)
- classes[dev->devno] = ATA_DEV_NONE;
- rc = 0;
- goto out;
+ /* prereset() might have cleared ATA_EH_RESET. If so,
+ * bang classes and return.
+ */
+ if (reset && !(ehc->i.action & ATA_EH_RESET)) {
+ ata_link_for_each_dev(dev, link)
+ classes[dev->devno] = ATA_DEV_NONE;
+ rc = 0;
+ goto out;
+ }
}
retry:
- deadline = jiffies + ata_eh_reset_timeouts[try++];
+ /*
+ * Perform reset
+ */
+ ehc->last_reset = jiffies;
+ if (ata_is_host_link(link))
+ ata_eh_freeze_port(ap);
- /* shut up during boot probing */
- if (verbose)
- ata_link_printk(link, KERN_INFO, "%s resetting link\n",
- reset == softreset ? "soft" : "hard");
+ deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]);
- /* mark that this EH session started with reset */
- if (reset == hardreset)
- ehc->i.flags |= ATA_EHI_DID_HARDRESET;
- else
- ehc->i.flags |= ATA_EHI_DID_SOFTRESET;
+ if (reset) {
+ if (verbose)
+ ata_link_printk(link, KERN_INFO, "%s resetting link\n",
+ reset == softreset ? "soft" : "hard");
- rc = ata_do_reset(link, reset, classes, deadline);
+ /* mark that this EH session started with reset */
+ if (reset == hardreset)
+ ehc->i.flags |= ATA_EHI_DID_HARDRESET;
+ else
+ ehc->i.flags |= ATA_EHI_DID_SOFTRESET;
- if (reset == hardreset &&
- ata_eh_followup_srst_needed(link, rc, classify, classes)) {
- /* okay, let's do follow-up softreset */
- reset = softreset;
+ rc = ata_do_reset(link, reset, classes, deadline);
- if (!reset) {
- ata_link_printk(link, KERN_ERR,
- "follow-up softreset required "
- "but no softreset avaliable\n");
- rc = -EINVAL;
- goto fail;
+ if (reset == hardreset &&
+ ata_eh_followup_srst_needed(link, rc, classify, 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");
+ rc = -EINVAL;
+ goto fail;
+ }
+
+ ata_eh_about_to_do(link, NULL, ATA_EH_RESET);
+ rc = ata_do_reset(link, reset, classes, deadline);
}
- ata_eh_about_to_do(link, NULL, ATA_EH_RESET);
- rc = ata_do_reset(link, reset, classes, deadline);
+ /* -EAGAIN can happen if we skipped followup SRST */
+ if (rc && rc != -EAGAIN)
+ goto fail;
+ } else {
+ if (verbose)
+ ata_link_printk(link, KERN_INFO, "no reset method "
+ "available, skipping reset\n");
+ if (!(lflags & ATA_LFLAG_ASSUME_CLASS))
+ lflags |= ATA_LFLAG_ASSUME_ATA;
}
- /* -EAGAIN can happen if we skipped followup SRST */
- if (rc && rc != -EAGAIN)
- goto fail;
-
- done:
+ /*
+ * Post-reset processing
+ */
ata_link_for_each_dev(dev, link) {
/* After the reset, the device state is PIO 0 and the
* controller state is undefined. Reset also wakes up
if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0)
link->sata_spd = (sstatus >> 4) & 0xf;
+ /* thaw the port */
+ if (ata_is_host_link(link))
+ ata_eh_thaw_port(ap);
+
+ /* postreset() should clear hardware SError. Although SError
+ * is cleared during link resume, clearing SError here is
+ * necessary as some PHYs raise hotplug events after SRST.
+ * This introduces race condition where hotplug occurs between
+ * reset and here. This race is mediated by cross checking
+ * link onlineness and classification result later.
+ */
if (postreset)
postreset(link, classes);
+ /* clear cached SError */
+ spin_lock_irqsave(link->ap->lock, flags);
+ link->eh_info.serror = 0;
+ spin_unlock_irqrestore(link->ap->lock, flags);
+
+ /* Make sure onlineness and classification result correspond.
+ * Hotplug could have happened during reset and some
+ * controllers fail to wait while a drive is spinning up after
+ * being hotplugged causing misdetection. By cross checking
+ * link onlineness and classification result, those conditions
+ * can be reliably detected and retried.
+ */
+ nr_known = 0;
+ ata_link_for_each_dev(dev, link) {
+ /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */
+ if (classes[dev->devno] == ATA_DEV_UNKNOWN)
+ classes[dev->devno] = ATA_DEV_NONE;
+ else
+ nr_known++;
+ }
+
+ if (classify && !nr_known && ata_link_online(link)) {
+ if (try < max_tries) {
+ ata_link_printk(link, KERN_WARNING, "link online but "
+ "device misclassified, retrying\n");
+ rc = -EAGAIN;
+ goto fail;
+ }
+ ata_link_printk(link, KERN_WARNING,
+ "link online but device misclassified, "
+ "device detection might fail\n");
+ }
+
/* reset successful, schedule revalidation */
ata_eh_done(link, NULL, ATA_EH_RESET);
+ ehc->last_reset = jiffies;
ehc->i.action |= ATA_EH_REVALIDATE;
rc = 0;
if (time_before(now, deadline)) {
unsigned long delta = deadline - now;
- ata_link_printk(link, KERN_WARNING, "reset failed "
- "(errno=%d), retrying in %u secs\n",
- rc, (jiffies_to_msecs(delta) + 999) / 1000);
+ ata_link_printk(link, KERN_WARNING,
+ "reset failed (errno=%d), retrying in %u secs\n",
+ rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000));
while (delta)
delta = schedule_timeout_uninterruptible(delta);
ata_eh_detach_dev(dev);
/* schedule probe if necessary */
- if (ata_eh_schedule_probe(dev))
+ if (ata_eh_schedule_probe(dev)) {
ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
+ memset(ehc->cmd_timeout_idx[dev->devno], 0,
+ sizeof(ehc->cmd_timeout_idx[dev->devno]));
+ }
return 1;
} else {
{
struct ata_link *link;
struct ata_device *dev;
- int nr_failed_devs, nr_disabled_devs;
- int reset, rc;
+ int nr_failed_devs;
+ int rc;
unsigned long flags;
DPRINTK("ENTER\n");
retry:
rc = 0;
nr_failed_devs = 0;
- nr_disabled_devs = 0;
- reset = 0;
/* if UNLOADING, finish immediately */
if (ap->pflags & ATA_PFLAG_UNLOADING)
if (ata_eh_skip_recovery(link))
ehc->i.action = 0;
- /* do we need to reset? */
- if (ehc->i.action & ATA_EH_RESET)
- reset = 1;
-
ata_link_for_each_dev(dev, link)
ehc->classes[dev->devno] = ATA_DEV_UNKNOWN;
}
/* reset */
- if (reset) {
- /* if PMP is attached, this function only deals with
- * downstream links, port should stay thawed.
- */
- if (!sata_pmp_attached(ap))
- ata_eh_freeze_port(ap);
-
- ata_port_for_each_link(link, ap) {
- struct ata_eh_context *ehc = &link->eh_context;
+ ata_port_for_each_link(link, ap) {
+ struct ata_eh_context *ehc = &link->eh_context;
- if (!(ehc->i.action & ATA_EH_RESET))
- continue;
+ if (!(ehc->i.action & ATA_EH_RESET))
+ continue;
- rc = ata_eh_reset(link, ata_link_nr_vacant(link),
- prereset, softreset, hardreset,
- postreset);
- if (rc) {
- ata_link_printk(link, KERN_ERR,
- "reset failed, giving up\n");
- goto out;
- }
+ rc = ata_eh_reset(link, ata_link_nr_vacant(link),
+ prereset, softreset, hardreset, postreset);
+ if (rc) {
+ ata_link_printk(link, KERN_ERR,
+ "reset failed, giving up\n");
+ goto out;
}
-
- if (!sata_pmp_attached(ap))
- ata_eh_thaw_port(ap);
}
/* the rest */
dev_fail:
nr_failed_devs++;
- if (ata_eh_handle_dev_fail(dev, rc))
- nr_disabled_devs++;
+ ata_eh_handle_dev_fail(dev, rc);
if (ap->pflags & ATA_PFLAG_FROZEN) {
/* PMP reset requires working host port.
}
}
- if (nr_failed_devs) {
- if (nr_failed_devs != nr_disabled_devs) {
- ata_port_printk(ap, KERN_WARNING, "failed to recover "
- "some devices, retrying in 5 secs\n");
- ssleep(5);
- } else {
- /* no device left to recover, repeat fast */
- msleep(500);
- }
-
+ if (nr_failed_devs)
goto retry;
- }
out:
if (rc && r_failed_link)
git.openpandora.org / pandora-kernel.git / blobdiff