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Message-ID: <4F7E07EE.60306@micron.com>
Date: Thu, 5 Apr 2012 14:00:30 -0700
From: Asai Thambi S P <asamymuthupa@...ron.com>
To: Jens Axboe <axboe@...nel.dk>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Sam Bradshaw <sbradshaw@...ron.com>
Subject: [PATCH 5/5] mtip32xx: dump tagmap on failure
dump tagmap on failure
Signed-off-by: Asai Thambi S P <asamymuthupa@...ron.com>
Reviewed-by: Sam Bradshaw <sbradshaw@...ron.com>
---
drivers/block/mtip32xx/mtip32xx.c | 62 +++++++++++++++++++-----------------
1 files changed, 33 insertions(+), 29 deletions(-)
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 95066b7..339d86c 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -525,6 +525,25 @@ static void mtip_restart_port(struct mtip_port *port)
}
/*
+ * Helper function for tag logging
+ */
+static void print_tags(struct driver_data *dd,
+ char *msg,
+ unsigned long *tagbits,
+ int cnt)
+{
+ unsigned char tagmap[128];
+ int group, tagmap_len = 0;
+
+ memset(tagmap, 0, sizeof(tagmap));
+ for (group = SLOTBITS_IN_LONGS; group > 0; group--)
+ tagmap_len = sprintf(tagmap + tagmap_len, "%016lX ",
+ tagbits[group-1]);
+ dev_warn(&dd->pdev->dev,
+ "%d command(s) %s: tagmap [%s]", cnt, msg, tagmap);
+}
+
+/*
* Called periodically to see if any read/write commands are
* taking too long to complete.
*
@@ -541,7 +560,7 @@ static void mtip_timeout_function(unsigned long int data)
int tag, cmdto_cnt = 0;
unsigned int bit, group;
unsigned int num_command_slots = port->dd->slot_groups * 32;
- unsigned long to;
+ unsigned long to, tagaccum[SLOTBITS_IN_LONGS];
if (unlikely(!port))
return;
@@ -551,6 +570,8 @@ static void mtip_timeout_function(unsigned long int data)
jiffies + msecs_to_jiffies(30000));
return;
}
+ /* clear the tag accumulator */
+ memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
for (tag = 0; tag < num_command_slots; tag++) {
/*
@@ -568,9 +589,7 @@ static void mtip_timeout_function(unsigned long int data)
command = &port->commands[tag];
fis = (struct host_to_dev_fis *) command->command;
- dev_warn(&port->dd->pdev->dev,
- "Timeout for command tag %d\n", tag);
-
+ set_bit(tag, tagaccum);
cmdto_cnt++;
if (cmdto_cnt == 1)
set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
@@ -607,9 +626,8 @@ static void mtip_timeout_function(unsigned long int data)
}
if (cmdto_cnt && !test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
- dev_warn(&port->dd->pdev->dev,
- "%d commands timed out: restarting port",
- cmdto_cnt);
+ print_tags(port->dd, "timed out", tagaccum, cmdto_cnt);
+
mtip_restart_port(port);
clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
wake_up_interruptible(&port->svc_wait);
@@ -733,23 +751,6 @@ static void mtip_null_completion(struct mtip_port *port,
return;
}
-/*
- * Helper function for tag logging
- */
-static void print_tags(struct driver_data *dd,
- char *msg,
- unsigned long *tagbits)
-{
- unsigned int tag, count = 0;
-
- for (tag = 0; tag < (dd->slot_groups) * 32; tag++) {
- if (test_bit(tag, tagbits))
- count++;
- }
- if (count)
- dev_info(&dd->pdev->dev, "%s [%i tags]\n", msg, count);
-}
-
static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
dma_addr_t buffer_dma, unsigned int sectors);
static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
@@ -770,6 +771,7 @@ static void mtip_handle_tfe(struct driver_data *dd)
u32 completed;
struct host_to_dev_fis *fis;
unsigned long tagaccum[SLOTBITS_IN_LONGS];
+ unsigned int cmd_cnt = 0;
unsigned char *buf;
char *fail_reason = NULL;
int fail_all_ncq_write = 0, fail_all_ncq_cmds = 0;
@@ -781,6 +783,9 @@ static void mtip_handle_tfe(struct driver_data *dd)
/* Stop the timer to prevent command timeouts. */
del_timer(&port->cmd_timer);
+ /* clear the tag accumulator */
+ memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
+
/* Set eh_active */
set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
@@ -791,9 +796,6 @@ static void mtip_handle_tfe(struct driver_data *dd)
/* clear completed status register in the hardware.*/
writel(completed, port->completed[group]);
- /* clear the tag accumulator */
- memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
-
/* Process successfully completed commands */
for (bit = 0; bit < 32 && completed; bit++) {
if (!(completed & (1<<bit)))
@@ -807,6 +809,7 @@ static void mtip_handle_tfe(struct driver_data *dd)
cmd = &port->commands[tag];
if (likely(cmd->comp_func)) {
set_bit(tag, tagaccum);
+ cmd_cnt++;
atomic_set(&cmd->active, 0);
cmd->comp_func(port,
tag,
@@ -824,7 +827,8 @@ static void mtip_handle_tfe(struct driver_data *dd)
}
}
}
- print_tags(dd, "TFE tags completed:", tagaccum);
+
+ print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt);
/* Restart the port */
mdelay(20);
@@ -934,7 +938,7 @@ static void mtip_handle_tfe(struct driver_data *dd)
tag);
}
}
- print_tags(dd, "TFE tags reissued:", tagaccum);
+ print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt);
/* clear eh_active */
clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
--
1.7.1
--
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