[PATCH v2 1/2] nvme: add per-controller io and admin timeouts

From: Maximilian Heyne
Date: Wed Apr 03 2019 - 08:36:03 EST

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Some NVMe controller require specific io and admin timeouts that are
different from the default, for instance local vs. remote storage.

This patch adds per-controller admin and io timeouts to the nvme_ctrl
structure and replaces all usages of the module parameters in the NVMe
drivers with the per-device timeouts.

Original-patch-by: Milan Pandurov <milanpa@xxxxxxxxxx>
Signed-off-by: Maximilian Heyne <mheyne@xxxxxxxxx>
---
v2: use per-controller timeout in other nvme drivers too

drivers/nvme/host/core.c | 11 +++++++----
drivers/nvme/host/fc.c | 2 +-
drivers/nvme/host/lightnvm.c | 2 +-
drivers/nvme/host/nvme.h | 2 ++
drivers/nvme/host/pci.c | 13 +++++++------
drivers/nvme/host/rdma.c | 4 ++--
drivers/nvme/host/tcp.c | 4 ++--
drivers/nvme/target/loop.c | 4 ++--
8 files changed, 24 insertions(+), 18 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 470601980794..d0530bf7a677 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -779,7 +779,7 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
if (IS_ERR(req))
return PTR_ERR(req);

- req->timeout = timeout ? timeout : ADMIN_TIMEOUT;
+ req->timeout = timeout ? timeout : q->rq_timeout;

if (buffer && bufflen) {
ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL);
@@ -862,7 +862,7 @@ static int nvme_submit_user_cmd(struct request_queue *q,
if (IS_ERR(req))
return PTR_ERR(req);

- req->timeout = timeout ? timeout : ADMIN_TIMEOUT;
+ req->timeout = timeout ? timeout : q->rq_timeout;
nvme_req(req)->flags |= NVME_REQ_USERCMD;

if (ubuffer && bufflen) {
@@ -1800,7 +1800,8 @@ int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
cmd.common.cdw11 = cpu_to_le32(len);

return __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, NULL, buffer, len,
- ADMIN_TIMEOUT, NVME_QID_ANY, 1, 0, false);
+ ctrl->admin_timeout, NVME_QID_ANY, 1, 0,
+ false);
}
EXPORT_SYMBOL_GPL(nvme_sec_submit);
#endif /* CONFIG_BLK_SED_OPAL */
@@ -3575,7 +3576,7 @@ static void nvme_fw_act_work(struct work_struct *work)
msecs_to_jiffies(ctrl->mtfa * 100);
else
fw_act_timeout = jiffies +
- msecs_to_jiffies(admin_timeout * 1000);
+ msecs_to_jiffies((ctrl->admin_timeout / HZ) * 1000);

nvme_stop_queues(ctrl);
while (nvme_ctrl_pp_status(ctrl)) {
@@ -3721,6 +3722,8 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
ctrl->dev = dev;
ctrl->ops = ops;
ctrl->quirks = quirks;
+ ctrl->io_timeout = NVME_IO_TIMEOUT;
+ ctrl->admin_timeout = ADMIN_TIMEOUT;
INIT_WORK(&ctrl->scan_work, nvme_scan_work);
INIT_WORK(&ctrl->async_event_work, nvme_async_event_work);
INIT_WORK(&ctrl->fw_act_work, nvme_fw_act_work);
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index f3b9d91ba0df..09614a214bed 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2431,7 +2431,7 @@ nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl)
ctrl->lport->ops->fcprqst_priv_sz);
ctrl->tag_set.driver_data = ctrl;
ctrl->tag_set.nr_hw_queues = ctrl->ctrl.queue_count - 1;
- ctrl->tag_set.timeout = NVME_IO_TIMEOUT;
+ ctrl->tag_set.timeout = ctrl->ctrl.io_timeout;

ret = blk_mq_alloc_tag_set(&ctrl->tag_set);
if (ret)
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 949e29e1d782..b9160123b53c 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -789,7 +789,7 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
goto err_cmd;
}

- rq->timeout = timeout ? timeout : ADMIN_TIMEOUT;
+ rq->timeout = timeout ? timeout : ns->ctrl->admin_timeout;

if (ppa_buf && ppa_len) {
ppa_list = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, &ppa_dma);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 527d64545023..1397650edfda 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -201,6 +201,8 @@ struct nvme_ctrl {
u32 aen_result;
u32 ctratt;
unsigned int shutdown_timeout;
+ unsigned int io_timeout;
+ unsigned int admin_timeout;
unsigned int kato;
bool subsystem;
unsigned long quirks;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index a90cf5d63aac..16d7a00fecf0 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1357,7 +1357,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
return BLK_EH_RESET_TIMER;
}

- abort_req->timeout = ADMIN_TIMEOUT;
+ abort_req->timeout = dev->ctrl.admin_timeout;
abort_req->end_io_data = NULL;
blk_execute_rq_nowait(abort_req->q, NULL, abort_req, 0, abort_endio);

@@ -1637,7 +1637,7 @@ static int nvme_alloc_admin_tags(struct nvme_dev *dev)
dev->admin_tagset.nr_hw_queues = 1;

dev->admin_tagset.queue_depth = NVME_AQ_MQ_TAG_DEPTH;
- dev->admin_tagset.timeout = ADMIN_TIMEOUT;
+ dev->admin_tagset.timeout = dev->ctrl.admin_timeout;
dev->admin_tagset.numa_node = dev_to_node(dev->dev);
dev->admin_tagset.cmd_size = nvme_pci_cmd_size(dev, false);
dev->admin_tagset.flags = BLK_MQ_F_NO_SCHED;
@@ -2226,7 +2226,7 @@ static int nvme_delete_queue(struct nvme_queue *nvmeq, u8 opcode)
if (IS_ERR(req))
return PTR_ERR(req);

- req->timeout = ADMIN_TIMEOUT;
+ req->timeout = nvmeq->dev->ctrl.admin_timeout;
req->end_io_data = nvmeq;

init_completion(&nvmeq->delete_done);
@@ -2242,7 +2242,7 @@ static bool __nvme_disable_io_queues(struct nvme_dev *dev, u8 opcode)
unsigned long timeout;

retry:
- timeout = ADMIN_TIMEOUT;
+ timeout = dev->ctrl.admin_timeout;
while (nr_queues > 0) {
if (nvme_delete_queue(&dev->queues[nr_queues], opcode))
break;
@@ -2282,7 +2282,7 @@ static int nvme_dev_add(struct nvme_dev *dev)
dev->tagset.nr_maps = 2; /* default + read */
if (dev->io_queues[HCTX_TYPE_POLL])
dev->tagset.nr_maps++;
- dev->tagset.timeout = NVME_IO_TIMEOUT;
+ dev->tagset.timeout = dev->ctrl.io_timeout;
dev->tagset.numa_node = dev_to_node(dev->dev);
dev->tagset.queue_depth =
min_t(int, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1;
@@ -2417,7 +2417,8 @@ static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown)
*/
if (!dead) {
if (shutdown)
- nvme_wait_freeze_timeout(&dev->ctrl, NVME_IO_TIMEOUT);
+ nvme_wait_freeze_timeout(&dev->ctrl,
+ dev->ctrl.io_timeout);
}

nvme_stop_queues(&dev->ctrl);
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 11a5ecae78c8..a81049fd3896 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -724,7 +724,7 @@ static struct blk_mq_tag_set *nvme_rdma_alloc_tagset(struct nvme_ctrl *nctrl,
SG_CHUNK_SIZE * sizeof(struct scatterlist);
set->driver_data = ctrl;
set->nr_hw_queues = 1;
- set->timeout = ADMIN_TIMEOUT;
+ set->timeout = nctrl->admin_timeout;
set->flags = BLK_MQ_F_NO_SCHED;
} else {
set = &ctrl->tag_set;
@@ -738,7 +738,7 @@ static struct blk_mq_tag_set *nvme_rdma_alloc_tagset(struct nvme_ctrl *nctrl,
SG_CHUNK_SIZE * sizeof(struct scatterlist);
set->driver_data = ctrl;
set->nr_hw_queues = nctrl->queue_count - 1;
- set->timeout = NVME_IO_TIMEOUT;
+ set->timeout = nctrl->io_timeout;
set->nr_maps = nctrl->opts->nr_poll_queues ? HCTX_MAX_TYPES : 2;
}

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 68c49dd67210..dede067e339b 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1449,7 +1449,7 @@ static struct blk_mq_tag_set *nvme_tcp_alloc_tagset(struct nvme_ctrl *nctrl,
set->cmd_size = sizeof(struct nvme_tcp_request);
set->driver_data = ctrl;
set->nr_hw_queues = 1;
- set->timeout = ADMIN_TIMEOUT;
+ set->timeout = nctrl->admin_timeout;
} else {
set = &ctrl->tag_set;
memset(set, 0, sizeof(*set));
@@ -1461,7 +1461,7 @@ static struct blk_mq_tag_set *nvme_tcp_alloc_tagset(struct nvme_ctrl *nctrl,
set->cmd_size = sizeof(struct nvme_tcp_request);
set->driver_data = ctrl;
set->nr_hw_queues = nctrl->queue_count - 1;
- set->timeout = NVME_IO_TIMEOUT;
+ set->timeout = nctrl->io_timeout;
set->nr_maps = 2 /* default + read */;
}

diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index b9f623ab01f3..7fbefca5c6cb 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -359,7 +359,7 @@ static int nvme_loop_configure_admin_queue(struct nvme_loop_ctrl *ctrl)
SG_CHUNK_SIZE * sizeof(struct scatterlist);
ctrl->admin_tag_set.driver_data = ctrl;
ctrl->admin_tag_set.nr_hw_queues = 1;
- ctrl->admin_tag_set.timeout = ADMIN_TIMEOUT;
+ ctrl->admin_tag_set.timeout = ctrl->ctrl.admin_timeout;
ctrl->admin_tag_set.flags = BLK_MQ_F_NO_SCHED;

ctrl->queues[0].ctrl = ctrl;
@@ -532,7 +532,7 @@ static int nvme_loop_create_io_queues(struct nvme_loop_ctrl *ctrl)
SG_CHUNK_SIZE * sizeof(struct scatterlist);
ctrl->tag_set.driver_data = ctrl;
ctrl->tag_set.nr_hw_queues = ctrl->ctrl.queue_count - 1;
- ctrl->tag_set.timeout = NVME_IO_TIMEOUT;
+ ctrl->tag_set.timeout = ctrl->ctrl.io_timeout;
ctrl->ctrl.tagset = &ctrl->tag_set;

ret = blk_mq_alloc_tag_set(&ctrl->tag_set);
--
2.16.5

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Next message: Maximilian Heyne: "[PATCH v2 0/2] Adding per-controller timeout support to nvme"
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