nvme-rdma: move tagset allocation to a dedicated routine

We always pair tagset allocation with rdma device reference and it shares
some code, centralize it with an argument if its an admin or IO tagset.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 6ef5650..3f580c1 100644 (file)
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -646,14 +646,79 @@ out_free_queues:
        return ret;
 }
 
+static void nvme_rdma_free_tagset(struct nvme_ctrl *nctrl, bool admin)
+{
+       struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
+       struct blk_mq_tag_set *set = admin ?
+                       &ctrl->admin_tag_set : &ctrl->tag_set;
+
+       blk_mq_free_tag_set(set);
+       nvme_rdma_dev_put(ctrl->device);
+}
+
+static struct blk_mq_tag_set *nvme_rdma_alloc_tagset(struct nvme_ctrl *nctrl,
+               bool admin)
+{
+       struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
+       struct blk_mq_tag_set *set;
+       int ret;
+
+       if (admin) {
+               set = &ctrl->admin_tag_set;
+               memset(set, 0, sizeof(*set));
+               set->ops = &nvme_rdma_admin_mq_ops;
+               set->queue_depth = NVME_RDMA_AQ_BLKMQ_DEPTH;
+               set->reserved_tags = 2; /* connect + keep-alive */
+               set->numa_node = NUMA_NO_NODE;
+               set->cmd_size = sizeof(struct nvme_rdma_request) +
+                       SG_CHUNK_SIZE * sizeof(struct scatterlist);
+               set->driver_data = ctrl;
+               set->nr_hw_queues = 1;
+               set->timeout = ADMIN_TIMEOUT;
+       } else {
+               set = &ctrl->tag_set;
+               memset(set, 0, sizeof(*set));
+               set->ops = &nvme_rdma_mq_ops;
+               set->queue_depth = nctrl->opts->queue_size;
+               set->reserved_tags = 1; /* fabric connect */
+               set->numa_node = NUMA_NO_NODE;
+               set->flags = BLK_MQ_F_SHOULD_MERGE;
+               set->cmd_size = sizeof(struct nvme_rdma_request) +
+                       SG_CHUNK_SIZE * sizeof(struct scatterlist);
+               set->driver_data = ctrl;
+               set->nr_hw_queues = nctrl->queue_count - 1;
+               set->timeout = NVME_IO_TIMEOUT;
+       }
+
+       ret = blk_mq_alloc_tag_set(set);
+       if (ret)
+               goto out;
+
+       /*
+        * We need a reference on the device as long as the tag_set is alive,
+        * as the MRs in the request structures need a valid ib_device.
+        */
+       ret = nvme_rdma_dev_get(ctrl->device);
+       if (!ret) {
+               ret = -EINVAL;
+               goto out_free_tagset;
+       }
+
+       return set;
+
+out_free_tagset:
+       blk_mq_free_tag_set(set);
+out:
+       return ERR_PTR(ret);
+}
+
 static void nvme_rdma_destroy_admin_queue(struct nvme_rdma_ctrl *ctrl)
 {
        nvme_rdma_free_qe(ctrl->queues[0].device->dev, &ctrl->async_event_sqe,
                        sizeof(struct nvme_command), DMA_TO_DEVICE);
        nvme_rdma_stop_and_free_queue(&ctrl->queues[0]);
        blk_cleanup_queue(ctrl->ctrl.admin_q);
-       blk_mq_free_tag_set(&ctrl->admin_tag_set);
-       nvme_rdma_dev_put(ctrl->device);
+       nvme_rdma_free_tagset(&ctrl->ctrl, true);
 }
 
 static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl)
@@ -666,32 +731,12 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl)
 
        ctrl->device = ctrl->queues[0].device;
 
-       /*
-        * We need a reference on the device as long as the tag_set is alive,
-        * as the MRs in the request structures need a valid ib_device.
-        */
-       error = -EINVAL;
-       if (!nvme_rdma_dev_get(ctrl->device))
-               goto out_free_queue;
-
        ctrl->max_fr_pages = min_t(u32, NVME_RDMA_MAX_SEGMENTS,
                ctrl->device->dev->attrs.max_fast_reg_page_list_len);
 
-       memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set));
-       ctrl->admin_tag_set.ops = &nvme_rdma_admin_mq_ops;
-       ctrl->admin_tag_set.queue_depth = NVME_RDMA_AQ_BLKMQ_DEPTH;
-       ctrl->admin_tag_set.reserved_tags = 2; /* connect + keep-alive */
-       ctrl->admin_tag_set.numa_node = NUMA_NO_NODE;
-       ctrl->admin_tag_set.cmd_size = sizeof(struct nvme_rdma_request) +
-               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;
-
-       error = blk_mq_alloc_tag_set(&ctrl->admin_tag_set);
-       if (error)
-               goto out_put_dev;
-       ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set;
+       ctrl->ctrl.admin_tagset = nvme_rdma_alloc_tagset(&ctrl->ctrl, true);
+       if (IS_ERR(ctrl->ctrl.admin_tagset))
+               goto out_free_queue;
 
        ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set);
        if (IS_ERR(ctrl->ctrl.admin_q)) {
@@ -740,9 +785,7 @@ out_cleanup_queue:
 out_free_tagset:
        /* disconnect and drain the queue before freeing the tagset */
        nvme_rdma_stop_queue(&ctrl->queues[0]);
-       blk_mq_free_tag_set(&ctrl->admin_tag_set);
-out_put_dev:
-       nvme_rdma_dev_put(ctrl->device);
+       nvme_rdma_free_tagset(&ctrl->ctrl, true);
 out_free_queue:
        nvme_rdma_free_queue(&ctrl->queues[0]);
        return error;
@@ -1644,8 +1687,7 @@ static void __nvme_rdma_remove_ctrl(struct nvme_rdma_ctrl *ctrl, bool shutdown)
        nvme_uninit_ctrl(&ctrl->ctrl);
        if (ctrl->ctrl.tagset) {
                blk_cleanup_queue(ctrl->ctrl.connect_q);
-               blk_mq_free_tag_set(&ctrl->tag_set);
-               nvme_rdma_dev_put(ctrl->device);
+               nvme_rdma_free_tagset(&ctrl->ctrl, false);
        }
 
        nvme_put_ctrl(&ctrl->ctrl);
@@ -1765,31 +1807,10 @@ static int nvme_rdma_create_io_queues(struct nvme_rdma_ctrl *ctrl)
        if (ret)
                return ret;
 
-       /*
-        * We need a reference on the device as long as the tag_set is alive,
-        * as the MRs in the request structures need a valid ib_device.
-        */
-       ret = -EINVAL;
-       if (!nvme_rdma_dev_get(ctrl->device))
+       ctrl->ctrl.tagset = nvme_rdma_alloc_tagset(&ctrl->ctrl, true);
+       if (IS_ERR(ctrl->ctrl.tagset))
                goto out_free_io_queues;
 
-       memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set));
-       ctrl->tag_set.ops = &nvme_rdma_mq_ops;
-       ctrl->tag_set.queue_depth = ctrl->ctrl.opts->queue_size;
-       ctrl->tag_set.reserved_tags = 1; /* fabric connect */
-       ctrl->tag_set.numa_node = NUMA_NO_NODE;
-       ctrl->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
-       ctrl->tag_set.cmd_size = sizeof(struct nvme_rdma_request) +
-               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;
-
-       ret = blk_mq_alloc_tag_set(&ctrl->tag_set);
-       if (ret)
-               goto out_put_dev;
-       ctrl->ctrl.tagset = &ctrl->tag_set;
-
        ctrl->ctrl.connect_q = blk_mq_init_queue(&ctrl->tag_set);
        if (IS_ERR(ctrl->ctrl.connect_q)) {
                ret = PTR_ERR(ctrl->ctrl.connect_q);
@@ -1805,9 +1826,7 @@ static int nvme_rdma_create_io_queues(struct nvme_rdma_ctrl *ctrl)
 out_cleanup_connect_q:
        blk_cleanup_queue(ctrl->ctrl.connect_q);
 out_free_tag_set:
-       blk_mq_free_tag_set(&ctrl->tag_set);
-out_put_dev:
-       nvme_rdma_dev_put(ctrl->device);
+       nvme_rdma_free_tagset(&ctrl->ctrl, false);
 out_free_io_queues:
        nvme_rdma_free_io_queues(ctrl);
        return ret;