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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>
This commit is contained in:
Sagi Grimberg 2015-12-24 15:26:59 +01:00 committed by Jens Axboe
parent c89e5b8024
commit 363c9aacb6
3 changed files with 33 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/nvme/host/core.c
View File

@ -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;

3
drivers/nvme/host/nvme.h
View File

@ -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);

32
drivers/nvme/host/pci.c
View File

@ -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);
}