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authorSagi Grimberg <sagig@mellanox.com>2015-12-24 17:26:59 +0300
committerJens Axboe <axboe@fb.com>2016-01-12 23:30:11 +0300
commit363c9aacb6c59bb63148dd115632880a4aed4d88 (patch)
treed018bf0126b3224ebcf541b8f66dc84964b6d28a /drivers/nvme
parentc89e5b80245899fc51fb1d83880e2f5762fcf350 (diff)
downloadlinux-363c9aacb6c59bb63148dd115632880a4aed4d88.tar.xz
nvme: Move nvme_freeze/unfreeze_queues to nvme core
Nothing pci specific about them and We'll need them exported in other transports too. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/core.c28
-rw-r--r--drivers/nvme/host/nvme.h3
-rw-r--r--drivers/nvme/host/pci.c32
3 files changed, 33 insertions, 30 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 1437ff36e91c..27130056136b 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1328,6 +1328,34 @@ out:
return ret;
}
+void nvme_freeze_queues(struct nvme_ctrl *ctrl)
+{
+ struct nvme_ns *ns;
+
+ list_for_each_entry(ns, &ctrl->namespaces, list) {
+ blk_mq_freeze_queue_start(ns->queue);
+
+ spin_lock_irq(ns->queue->queue_lock);
+ queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue);
+ spin_unlock_irq(ns->queue->queue_lock);
+
+ blk_mq_cancel_requeue_work(ns->queue);
+ blk_mq_stop_hw_queues(ns->queue);
+ }
+}
+
+void nvme_unfreeze_queues(struct nvme_ctrl *ctrl)
+{
+ struct nvme_ns *ns;
+
+ list_for_each_entry(ns, &ctrl->namespaces, list) {
+ queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue);
+ blk_mq_unfreeze_queue(ns->queue);
+ blk_mq_start_stopped_hw_queues(ns->queue, true);
+ blk_mq_kick_requeue_list(ns->queue);
+ }
+}
+
int __init nvme_core_init(void)
{
int result;
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index d88cf45fbcc1..0da67474ce6d 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -237,6 +237,9 @@ int nvme_init_identify(struct nvme_ctrl *ctrl);
void nvme_scan_namespaces(struct nvme_ctrl *ctrl);
void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
+void nvme_freeze_queues(struct nvme_ctrl *ctrl);
+void nvme_unfreeze_queues(struct nvme_ctrl *ctrl);
+
struct request *nvme_alloc_request(struct request_queue *q,
struct nvme_command *cmd, unsigned int flags);
void nvme_requeue_req(struct request *req);
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index b82bbea909cd..a7e549969462 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1903,34 +1903,6 @@ static void nvme_dev_list_remove(struct nvme_dev *dev)
kthread_stop(tmp);
}
-static void nvme_freeze_queues(struct nvme_dev *dev)
-{
- struct nvme_ns *ns;
-
- list_for_each_entry(ns, &dev->ctrl.namespaces, list) {
- blk_mq_freeze_queue_start(ns->queue);
-
- spin_lock_irq(ns->queue->queue_lock);
- queue_flag_set(QUEUE_FLAG_STOPPED, ns->queue);
- spin_unlock_irq(ns->queue->queue_lock);
-
- blk_mq_cancel_requeue_work(ns->queue);
- blk_mq_stop_hw_queues(ns->queue);
- }
-}
-
-static void nvme_unfreeze_queues(struct nvme_dev *dev)
-{
- struct nvme_ns *ns;
-
- list_for_each_entry(ns, &dev->ctrl.namespaces, list) {
- queue_flag_clear_unlocked(QUEUE_FLAG_STOPPED, ns->queue);
- blk_mq_unfreeze_queue(ns->queue);
- blk_mq_start_stopped_hw_queues(ns->queue, true);
- blk_mq_kick_requeue_list(ns->queue);
- }
-}
-
static void nvme_dev_shutdown(struct nvme_dev *dev)
{
int i;
@@ -1940,7 +1912,7 @@ static void nvme_dev_shutdown(struct nvme_dev *dev)
mutex_lock(&dev->shutdown_lock);
if (dev->bar) {
- nvme_freeze_queues(dev);
+ nvme_freeze_queues(&dev->ctrl);
csts = readl(dev->bar + NVME_REG_CSTS);
}
if (csts & NVME_CSTS_CFS || !(csts & NVME_CSTS_RDY)) {
@@ -2049,7 +2021,7 @@ static void nvme_reset_work(struct work_struct *work)
dev_warn(dev->dev, "IO queues not created\n");
nvme_remove_namespaces(&dev->ctrl);
} else {
- nvme_unfreeze_queues(dev);
+ nvme_unfreeze_queues(&dev->ctrl);
nvme_dev_add(dev);
}