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Diffstat (limited to 'drivers/ata/libata-eh.c')
-rw-r--r--drivers/ata/libata-eh.c219
1 files changed, 171 insertions, 48 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 7894d83ea1eb..58bdc538d229 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -66,15 +66,19 @@ enum {
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
@@ -84,12 +88,59 @@ enum {
* 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
@@ -236,6 +287,73 @@ void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
#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)
{
@@ -486,6 +604,9 @@ void ata_scsi_error(struct Scsi_Host *host)
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;
@@ -641,7 +762,7 @@ void ata_eh_fastdrain_timerfn(unsigned long arg)
/* 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);
}
@@ -681,7 +802,8 @@ static void ata_eh_set_pending(struct ata_port *ap, int fastdrain)
/* 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);
}
@@ -1238,6 +1360,7 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
* 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)
+ * @dfl_sense_key: default sense key to use
*
* Perform ATAPI REQUEST_SENSE after the device reported CHECK
* SENSE. This function is EH helper.
@@ -1248,13 +1371,13 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
* RETURNS:
* 0 on success, AC_ERR_* mask on failure
*/
-static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
+static unsigned int atapi_eh_request_sense(struct ata_device *dev,
+ u8 *sense_buf, u8 dfl_sense_key)
{
- struct ata_device *dev = qc->dev;
- unsigned char *sense_buf = qc->scsicmd->sense_buffer;
+ u8 cdb[ATAPI_CDB_LEN] =
+ { REQUEST_SENSE, 0, 0, 0, SCSI_SENSE_BUFFERSIZE, 0 };
struct ata_port *ap = dev->link->ap;
struct ata_taskfile tf;
- u8 cdb[ATAPI_CDB_LEN];
DPRINTK("ATAPI request sense\n");
@@ -1265,15 +1388,11 @@ static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
* for the case where they are -not- overwritten
*/
sense_buf[0] = 0x70;
- sense_buf[2] = qc->result_tf.feature >> 4;
+ sense_buf[2] = dfl_sense_key;
/* some devices time out if garbage left in tf */
ata_tf_init(dev, &tf);
- 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;
@@ -1445,7 +1564,9 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
case ATA_DEV_ATAPI:
if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) {
- tmp = atapi_eh_request_sense(qc);
+ tmp = atapi_eh_request_sense(qc->dev,
+ qc->scsicmd->sense_buffer,
+ qc->result_tf.feature >> 4);
if (!tmp) {
/* ATA_QCFLAG_SENSE_VALID is used to
* tell atapi_qc_complete() that sense
@@ -2071,13 +2192,12 @@ int ata_eh_reset(struct ata_link *link, int classify,
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;
@@ -2088,11 +2208,20 @@ int ata_eh_reset(struct ata_link *link, int classify,
/*
* 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);
+
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)
@@ -2125,7 +2254,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
}
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,
@@ -2157,10 +2287,11 @@ int ata_eh_reset(struct ata_link *link, int classify,
/*
* Perform reset
*/
+ ehc->last_reset = jiffies;
if (ata_is_host_link(link))
ata_eh_freeze_port(ap);
- deadline = jiffies + ata_eh_reset_timeouts[try++];
+ deadline = ata_deadline(jiffies, ata_eh_reset_timeouts[try++]);
if (reset) {
if (verbose)
@@ -2277,6 +2408,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
/* reset successful, schedule revalidation */
ata_eh_done(link, NULL, ATA_EH_RESET);
+ ehc->last_reset = jiffies;
ehc->i.action |= ATA_EH_REVALIDATE;
rc = 0;
@@ -2303,9 +2435,9 @@ 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, "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);
@@ -2583,8 +2715,11 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
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 {
@@ -2622,7 +2757,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
{
struct ata_link *link;
struct ata_device *dev;
- int nr_failed_devs, nr_disabled_devs;
+ int nr_failed_devs;
int rc;
unsigned long flags;
@@ -2665,7 +2800,6 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
retry:
rc = 0;
nr_failed_devs = 0;
- nr_disabled_devs = 0;
/* if UNLOADING, finish immediately */
if (ap->pflags & ATA_PFLAG_UNLOADING)
@@ -2732,8 +2866,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
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.
@@ -2745,18 +2878,8 @@ dev_fail:
}
}
- 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)
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-22 12:21:09 +0000