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mtip32xx: Implement timeout handler

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Added timeout handler. Replaced blk_mq_end_request() with
blk_mq_complete_request() to avoid double completion of a request.

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Rajesh Kumar Sambandam <rsambandam@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Asai Thambi SP 2016-02-24 21:21:13 -08:00 committed by Jens Axboe
parent aae4a03386
commit abb0ccd185
2 changed files with 92 additions and 10 deletions
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95
drivers/block/mtip32xx/mtip32xx.c
View File

@ -233,15 +233,9 @@ static void mtip_async_complete(struct mtip_port *port,
"Command tag %d failed due to TFE\n", tag);
}
/* Unmap the DMA scatter list entries */
dma_unmap_sg(&dd->pdev->dev, cmd->sg, cmd->scatter_ents, cmd->direction);
rq = mtip_rq_from_tag(dd, tag);
if (unlikely(cmd->unaligned))
up(&port->cmd_slot_unal);
blk_mq_end_request(rq, status ? -EIO : 0);
blk_mq_complete_request(rq, status);
}
/*
@ -2889,6 +2883,42 @@ static int mtip_ftl_rebuild_poll(struct driver_data *dd)
return -EFAULT;
}
static void mtip_softirq_done_fn(struct request *rq)
{
struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
struct driver_data *dd = rq->q->queuedata;
/* Unmap the DMA scatter list entries */
dma_unmap_sg(&dd->pdev->dev, cmd->sg, cmd->scatter_ents,
cmd->direction);
if (unlikely(cmd->unaligned))
up(&dd->port->cmd_slot_unal);
blk_mq_end_request(rq, rq->errors);
}
static void mtip_abort_cmd(struct request *req, void *data,
bool reserved)
{
struct driver_data *dd = data;
dbg_printk(MTIP_DRV_NAME " Aborting request, tag = %d\n", req->tag);
clear_bit(req->tag, dd->port->cmds_to_issue);
req->errors = -EIO;
mtip_softirq_done_fn(req);
}
static void mtip_queue_cmd(struct request *req, void *data,
bool reserved)
{
struct driver_data *dd = data;
set_bit(req->tag, dd->port->cmds_to_issue);
blk_abort_request(req);
}
/*
* service thread to issue queued commands
*
@ -2901,7 +2931,7 @@ static int mtip_ftl_rebuild_poll(struct driver_data *dd)
static int mtip_service_thread(void *data)
{
struct driver_data *dd = (struct driver_data *)data;
unsigned long slot, slot_start, slot_wrap;
unsigned long slot, slot_start, slot_wrap, to;
unsigned int num_cmd_slots = dd->slot_groups * 32;
struct mtip_port *port = dd->port;
@ -2938,6 +2968,32 @@ restart_eh:
if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags))
goto restart_eh;
if (test_bit(MTIP_PF_TO_ACTIVE_BIT, &port->flags)) {
to = jiffies + msecs_to_jiffies(5000);
do {
mdelay(100);
} while (atomic_read(&dd->irq_workers_active) != 0 &&
time_before(jiffies, to));
if (atomic_read(&dd->irq_workers_active) != 0)
dev_warn(&dd->pdev->dev,
"Completion workers still active!");
spin_lock(dd->queue->queue_lock);
blk_mq_all_tag_busy_iter(*dd->tags.tags,
mtip_queue_cmd, dd);
spin_unlock(dd->queue->queue_lock);
set_bit(MTIP_PF_ISSUE_CMDS_BIT, &dd->port->flags);
if (mtip_device_reset(dd))
blk_mq_all_tag_busy_iter(*dd->tags.tags,
mtip_abort_cmd, dd);
clear_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags);
}
if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
slot = 1;
/* used to restrict the loop to one iteration */
@ -3803,11 +3859,33 @@ static int mtip_init_cmd(void *data, struct request *rq, unsigned int hctx_idx,
return 0;
}
static enum blk_eh_timer_return mtip_cmd_timeout(struct request *req,
bool reserved)
{
struct driver_data *dd = req->q->queuedata;
int ret = BLK_EH_RESET_TIMER;
if (reserved)
goto exit_handler;
if (test_bit(req->tag, dd->port->cmds_to_issue))
goto exit_handler;
if (test_and_set_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags))
goto exit_handler;
wake_up_interruptible(&dd->port->svc_wait);
exit_handler:
return ret;
}
static struct blk_mq_ops mtip_mq_ops = {
.queue_rq = mtip_queue_rq,
.map_queue = blk_mq_map_queue,
.init_request = mtip_init_cmd,
.exit_request = mtip_free_cmd,
.complete = mtip_softirq_done_fn,
.timeout = mtip_cmd_timeout,
};
/*
@ -3883,6 +3961,7 @@ static int mtip_block_initialize(struct driver_data *dd)
dd->tags.numa_node = dd->numa_node;
dd->tags.flags = BLK_MQ_F_SHOULD_MERGE;
dd->tags.driver_data = dd;
dd->tags.timeout = MTIP_NCQ_CMD_TIMEOUT_MS;
rv = blk_mq_alloc_tag_set(&dd->tags);
if (rv) {

7
drivers/block/mtip32xx/mtip32xx.h
View File

@ -134,10 +134,12 @@ enum {
MTIP_PF_EH_ACTIVE_BIT = 1, /* error handling */
MTIP_PF_SE_ACTIVE_BIT = 2, /* secure erase */
MTIP_PF_DM_ACTIVE_BIT = 3, /* download microcde */
MTIP_PF_TO_ACTIVE_BIT = 9, /* timeout handling */
MTIP_PF_PAUSE_IO = ((1 << MTIP_PF_IC_ACTIVE_BIT) |
(1 << MTIP_PF_EH_ACTIVE_BIT) |
(1 << MTIP_PF_SE_ACTIVE_BIT) |
(1 << MTIP_PF_DM_ACTIVE_BIT)),
(1 << MTIP_PF_DM_ACTIVE_BIT) |
(1 << MTIP_PF_TO_ACTIVE_BIT)),
MTIP_PF_SVC_THD_ACTIVE_BIT = 4,
MTIP_PF_ISSUE_CMDS_BIT = 5,
@ -147,7 +149,8 @@ enum {
MTIP_PF_SVC_THD_WORK = ((1 << MTIP_PF_EH_ACTIVE_BIT) |
(1 << MTIP_PF_ISSUE_CMDS_BIT) |
(1 << MTIP_PF_REBUILD_BIT) |
(1 << MTIP_PF_SVC_THD_STOP_BIT)),
(1 << MTIP_PF_SVC_THD_STOP_BIT) |
(1 << MTIP_PF_TO_ACTIVE_BIT)),
/* below are bit numbers in 'dd_flag' defined in driver_data */
MTIP_DDF_SEC_LOCK_BIT = 0,