linux-kernel - [RFC PATCH 21/21] nvme-pci: use lib tagset init helper

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Message-ID: <20221005032257.80681-22-kch@nvidia.com>
Date:   Tue, 4 Oct 2022 20:22:57 -0700
From:   Chaitanya Kulkarni <kch@...dia.com>
To:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-omap@...r.kernel.org>, <linux-remoteproc@...r.kernel.org>,
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Subject: [RFC PATCH 21/21] nvme-pci: use lib tagset init helper

Use the block layer helper to initialize the common fields of tag_set
such as blk_mq_ops, number of h/w queues, queue depth, command size,
numa_node, timeout, BLK_MQ_F_XXX flags, driver data. This initialization
is spread all over the block drivers. This avoids the code repetation of
the inialization code of the tag set in current block drivers and any
future ones.

Signed-off-by: Chaitanya Kulkarni <kch@...dia.com>
---
 drivers/nvme/host/pci.c | 25 +++++++------------------
 1 file changed, 7 insertions(+), 18 deletions(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 7bbffd2a9beb..52af4b2bb668 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1757,15 +1757,9 @@ static int nvme_pci_alloc_admin_tag_set(struct nvme_dev *dev)
 {
 	struct blk_mq_tag_set *set = &dev->admin_tagset;
 
-	set->ops = &nvme_mq_admin_ops;
-	set->nr_hw_queues = 1;
-
-	set->queue_depth = NVME_AQ_MQ_TAG_DEPTH;
-	set->timeout = NVME_ADMIN_TIMEOUT;
-	set->numa_node = dev->ctrl.numa_node;
-	set->cmd_size = sizeof(struct nvme_iod);
-	set->flags = BLK_MQ_F_NO_SCHED;
-	set->driver_data = dev;
+	blk_mq_init_tag_set(set, &nvme_mq_admin_ops, 1, NVME_AQ_MQ_TAG_DEPTH,
+			sizeof(struct nvme_iod), dev->ctrl.numa_node,
+			NVME_ADMIN_TIMEOUT, BLK_MQ_F_NO_SCHED, dev);
 
 	if (blk_mq_alloc_tag_set(set))
 		return -ENOMEM;
@@ -2528,20 +2522,15 @@ static void nvme_pci_alloc_tag_set(struct nvme_dev *dev)
 	struct blk_mq_tag_set * set = &dev->tagset;
 	int ret;
 
-	set->ops = &nvme_mq_ops;
-	set->nr_hw_queues = dev->online_queues - 1;
 	set->nr_maps = 1;
 	if (dev->io_queues[HCTX_TYPE_READ])
 		set->nr_maps = 2;
 	if (dev->io_queues[HCTX_TYPE_POLL])
 		set->nr_maps = 3;
-	set->timeout = NVME_IO_TIMEOUT;
-	set->numa_node = dev->ctrl.numa_node;
-	set->queue_depth = min_t(unsigned, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1;
-	set->cmd_size = sizeof(struct nvme_iod);
-	set->flags = BLK_MQ_F_SHOULD_MERGE;
-	set->driver_data = dev;
-
+	blk_mq_init_tag_set(set, &nvme_mq_ops, dev->online_queues - 1,
+			min_t(unsigned, dev->q_depth, BLK_MQ_MAX_DEPTH) - 1,
+			sizeof(struct nvme_iod), dev->ctrl.numa_node,
+			NVME_IO_TIMEOUT, BLK_MQ_F_SHOULD_MERGE, dev);
 	/*
 	 * Some Apple controllers requires tags to be unique
 	 * across admin and IO queue, so reserve the first 32
-- 
2.29.0