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Date: Tue, 20 May 2014 10:48:56 -0700
From: Asai Thambi S P <asamymuthupa@...ron.com>
To: Jens Axboe <axboe@...nel.dk>
CC: linux-kernel <linux-kernel@...r.kernel.org>,
Selvan Mani <smani@...ron.com>,
Sam Bradshaw <sbradshaw@...ron.com>
Subject: [PATCH] mtip32xx: move error handling to service thread
Move error handling to service thread, and use mtip_set_timeout()
to set timeouts for HDIO_DRIVE_TASK and HDIO_DRIVE_CMD IOCTL commands.
Signed-off-by: Selvan Mani <smani@...ron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@...ron.com>
---
drivers/block/mtip32xx/mtip32xx.c | 71 +++++++++++++++++++++++++------------
drivers/block/mtip32xx/mtip32xx.h | 8 +++--
2 files changed, 53 insertions(+), 26 deletions(-)
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 4efc676..6124aa4 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -620,7 +620,6 @@ static void mtip_handle_tfe(struct driver_data *dd)
port = dd->port;
- /* Stop the timer to prevent command timeouts. */
set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) &&
@@ -855,8 +854,6 @@ static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat)
*/
static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat)
{
- if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR)))
- mtip_handle_tfe(dd);
if (unlikely(port_stat & PORT_IRQ_CONNECT)) {
dev_warn(&dd->pdev->dev,
@@ -874,6 +871,12 @@ static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat)
dev_warn(&dd->pdev->dev,
"Port stat errors %x unhandled\n",
(port_stat & ~PORT_IRQ_HANDLED));
+ if (mtip_check_surprise_removal(dd->pdev))
+ return;
+ }
+ if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) {
+ set_bit(MTIP_PF_EH_ACTIVE_BIT, &dd->port->flags);
+ wake_up_interruptible(&dd->port->svc_wait);
}
}
@@ -1040,8 +1043,13 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
msleep(20);
continue; /* svc thd is actively issuing commands */
}
+
+ msleep(100);
+ if (mtip_check_surprise_removal(port->dd->pdev))
+ goto err_fault;
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
goto err_fault;
+
/*
* Ignore s_active bit 0 of array element 0.
* This bit will always be set
@@ -1052,8 +1060,6 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
if (!active)
break;
-
- msleep(20);
} while (time_before(jiffies, to));
blk_mq_start_stopped_hw_queues(port->dd->queue, true);
@@ -1113,7 +1119,8 @@ static int mtip_exec_internal_command(struct mtip_port *port,
if (atomic == GFP_KERNEL) {
if (fis->command != ATA_CMD_STANDBYNOW1) {
/* wait for io to complete if non atomic */
- if (mtip_quiesce_io(port, 5000) < 0) {
+ if (mtip_quiesce_io(port,
+ MTIP_QUIESCE_IO_TIMEOUT_MS) < 0) {
dev_warn(&dd->pdev->dev,
"Failed to quiesce IO\n");
mtip_put_int_command(dd, int_cmd);
@@ -1161,9 +1168,9 @@ static int mtip_exec_internal_command(struct mtip_port *port,
if (atomic == GFP_KERNEL) {
/* Wait for the command to complete or timeout. */
- if (wait_for_completion_interruptible_timeout(
+ if ((rv = wait_for_completion_interruptible_timeout(
&wait,
- msecs_to_jiffies(timeout)) <= 0) {
+ msecs_to_jiffies(timeout))) <= 0) {
if (rv == -ERESTARTSYS) { /* interrupted */
dev_err(&dd->pdev->dev,
"Internal command [%02X] was interrupted after %lu ms\n",
@@ -1299,7 +1306,7 @@ static void mtip_set_timeout(struct driver_data *dd,
*timeout = 15000; /* 15 seconds */
break;
default:
- *timeout = MTIP_IOCTL_COMMAND_TIMEOUT_MS;
+ *timeout = MTIP_IOCTL_CMD_TIMEOUT_MS;
break;
}
}
@@ -1351,7 +1358,7 @@ static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
sizeof(u16) * ATA_ID_WORDS,
0,
GFP_KERNEL,
- MTIP_INTERNAL_COMMAND_TIMEOUT_MS)
+ MTIP_INT_CMD_TIMEOUT_MS)
< 0) {
rv = -1;
goto out;
@@ -1483,7 +1490,7 @@ static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
sectors * ATA_SECT_SIZE,
0,
GFP_ATOMIC,
- MTIP_INTERNAL_COMMAND_TIMEOUT_MS);
+ MTIP_INT_CMD_TIMEOUT_MS);
}
/*
@@ -1776,6 +1783,7 @@ static int exec_drive_task(struct mtip_port *port, u8 *command)
{
struct host_to_dev_fis fis;
struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG);
+ unsigned int to;
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
@@ -1789,6 +1797,8 @@ static int exec_drive_task(struct mtip_port *port, u8 *command)
fis.cyl_hi = command[5];
fis.device = command[6] & ~0x10; /* Clear the dev bit*/
+ mtip_set_timeout(port->dd, &fis, &to, 0);
+
dbg_printk(MTIP_DRV_NAME " %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
__func__,
command[0],
@@ -1807,7 +1817,7 @@ static int exec_drive_task(struct mtip_port *port, u8 *command)
0,
0,
GFP_KERNEL,
- MTIP_IOCTL_COMMAND_TIMEOUT_MS) < 0) {
+ to) < 0) {
return -1;
}
@@ -1847,6 +1857,7 @@ static int exec_drive_command(struct mtip_port *port, u8 *command,
u8 *buf = NULL;
dma_addr_t dma_addr = 0;
int rv = 0, xfer_sz = command[3];
+ unsigned int to;
if (xfer_sz) {
if (!user_buffer)
@@ -1878,6 +1889,8 @@ static int exec_drive_command(struct mtip_port *port, u8 *command,
fis.cyl_hi = 0xC2;
}
+ mtip_set_timeout(port->dd, &fis, &to, 0);
+
if (xfer_sz)
reply = (port->rxfis + RX_FIS_PIO_SETUP);
else
@@ -1900,7 +1913,7 @@ static int exec_drive_command(struct mtip_port *port, u8 *command,
(xfer_sz ? ATA_SECT_SIZE * xfer_sz : 0),
0,
GFP_KERNEL,
- MTIP_IOCTL_COMMAND_TIMEOUT_MS)
+ to)
< 0) {
rv = -EFAULT;
goto exit_drive_command;
@@ -2956,6 +2969,11 @@ static int mtip_service_thread(void *data)
int ret;
while (1) {
+ if (kthread_should_stop() ||
+ test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
+ goto st_out;
+ clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
+
/*
* the condition is to check neither an internal command is
* is in progress nor error handling is active
@@ -2963,11 +2981,12 @@ static int mtip_service_thread(void *data)
wait_event_interruptible(port->svc_wait, (port->flags) &&
!(port->flags & MTIP_PF_PAUSE_IO));
- if (kthread_should_stop())
- goto st_out;
-
set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
+ if (kthread_should_stop() ||
+ test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
+ goto st_out;
+
/* If I am an orphan, start self cleanup */
if (test_bit(MTIP_PF_SR_CLEANUP_BIT, &port->flags))
break;
@@ -2976,6 +2995,16 @@ static int mtip_service_thread(void *data)
&dd->dd_flag)))
goto st_out;
+restart_eh:
+ /* Demux bits: start with error handling */
+ if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) {
+ mtip_handle_tfe(dd);
+ clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
+ }
+
+ if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags))
+ goto restart_eh;
+
if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
slot = 1;
/* used to restrict the loop to one iteration */
@@ -3005,16 +3034,14 @@ static int mtip_service_thread(void *data)
}
clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
- } else if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) {
+ }
+
+ if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) {
if (mtip_ftl_rebuild_poll(dd) < 0)
set_bit(MTIP_DDF_REBUILD_FAILED_BIT,
&dd->dd_flag);
clear_bit(MTIP_PF_REBUILD_BIT, &port->flags);
}
- clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
-
- if (test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
- goto st_out;
}
/* wait for pci remove to exit */
@@ -4499,8 +4526,6 @@ static void mtip_pci_remove(struct pci_dev *pdev)
pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
pci_set_drvdata(pdev, NULL);
- pci_dev_put(pdev);
-
}
/*
diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h
index 982a88f..4b9b554 100644
--- a/drivers/block/mtip32xx/mtip32xx.h
+++ b/drivers/block/mtip32xx/mtip32xx.h
@@ -40,9 +40,11 @@
#define MTIP_MAX_RETRIES 2
/* Various timeout values in ms */
-#define MTIP_NCQ_COMMAND_TIMEOUT_MS 5000
-#define MTIP_IOCTL_COMMAND_TIMEOUT_MS 5000
-#define MTIP_INTERNAL_COMMAND_TIMEOUT_MS 5000
+#define MTIP_NCQ_CMD_TIMEOUT_MS 15000
+#define MTIP_IOCTL_CMD_TIMEOUT_MS 5000
+#define MTIP_INT_CMD_TIMEOUT_MS 5000
+#define MTIP_QUIESCE_IO_TIMEOUT_MS (MTIP_NCQ_CMD_TIMEOUT_MS * \
+ (MTIP_MAX_RETRIES + 1))
/* check for timeouts every 500ms */
#define MTIP_TIMEOUT_CHECK_PERIOD 500
--
1.7.1
--
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