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>

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);
         }