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[RFC 6/7] nvme: Move BLK_MQ_F_BLOCKING indicator to struct nvme_ctrl

mhkelley58@gmail.com posted 7 patches 1 year, 5 months ago
[RFC 6/7] nvme: Move BLK_MQ_F_BLOCKING indicator to struct nvme_ctrl
Posted by mhkelley58@gmail.com 1 year, 5 months ago 
From: Michael Kelley <mhklinux@outlook.com>

The NVMe setting that controls the BLK_MQ_F_BLOCKING flag on the
request queue is currently a flag in struct nvme_ctrl_ops, where
it is not writable. A new use case needs this flag to be writable
based on a determination made during the NVMe device probe function.

Move this setting to struct nvme_ctrl, and update the only user to
set it in the new location.

No functional change.

Signed-off-by: Michael Kelley <mhklinux@outlook.com>
---
 drivers/nvme/host/core.c | 4 ++--
 drivers/nvme/host/nvme.h | 2 +-
 drivers/nvme/host/tcp.c  | 3 ++-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 33fa01c599ad..f1ce325471f1 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4495,7 +4495,7 @@ int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
 		set->reserved_tags = 2;
 	set->numa_node = ctrl->numa_node;
 	set->flags = BLK_MQ_F_NO_SCHED;
-	if (ctrl->ops->flags & NVME_F_BLOCKING)
+	if (ctrl->blocking)
 		set->flags |= BLK_MQ_F_BLOCKING;
 	set->cmd_size = cmd_size;
 	set->driver_data = ctrl;
@@ -4565,7 +4565,7 @@ int nvme_alloc_io_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
 		set->reserved_tags = 1;
 	set->numa_node = ctrl->numa_node;
 	set->flags = BLK_MQ_F_SHOULD_MERGE;
-	if (ctrl->ops->flags & NVME_F_BLOCKING)
+	if (ctrl->blocking)
 		set->flags |= BLK_MQ_F_BLOCKING;
 	set->cmd_size = cmd_size,
 	set->driver_data = ctrl;
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index ae5314d32943..28709f166cab 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -338,6 +338,7 @@ struct nvme_ctrl {
 	unsigned int shutdown_timeout;
 	unsigned int kato;
 	bool subsystem;
+	bool blocking;
 	unsigned long quirks;
 	struct nvme_id_power_state psd[32];
 	struct nvme_effects_log *effects;
@@ -546,7 +547,6 @@ struct nvme_ctrl_ops {
 	unsigned int flags;
 #define NVME_F_FABRICS			(1 << 0)
 #define NVME_F_METADATA_SUPPORTED	(1 << 1)
-#define NVME_F_BLOCKING			(1 << 2)
 
 	const struct attribute_group **dev_attr_groups;
 	int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 9ea6be0b0392..6b9fdf7dc1ac 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -2658,7 +2658,7 @@ static const struct blk_mq_ops nvme_tcp_admin_mq_ops = {
 static const struct nvme_ctrl_ops nvme_tcp_ctrl_ops = {
 	.name			= "tcp",
 	.module			= THIS_MODULE,
-	.flags			= NVME_F_FABRICS | NVME_F_BLOCKING,
+	.flags			= NVME_F_FABRICS,
 	.reg_read32		= nvmf_reg_read32,
 	.reg_read64		= nvmf_reg_read64,
 	.reg_write32		= nvmf_reg_write32,
@@ -2762,6 +2762,7 @@ static struct nvme_tcp_ctrl *nvme_tcp_alloc_ctrl(struct device *dev,
 	if (ret)
 		goto out_kfree_queues;
 
+	ctrl->ctrl.blocking = true;
 	return ctrl;
 out_kfree_queues:
 	kfree(ctrl->queues);
-- 
2.25.1
Re: [RFC 6/7] nvme: Move BLK_MQ_F_BLOCKING indicator to struct nvme_ctrl
Posted by Petr Tesařík 1 year, 5 months ago 
On Thu, 22 Aug 2024 11:37:17 -0700
mhkelley58@gmail.com wrote:

> From: Michael Kelley <mhklinux@outlook.com>
> 
> The NVMe setting that controls the BLK_MQ_F_BLOCKING flag on the
> request queue is currently a flag in struct nvme_ctrl_ops, where
> it is not writable. A new use case needs this flag to be writable
> based on a determination made during the NVMe device probe function.
> 
> Move this setting to struct nvme_ctrl, and update the only user to
> set it in the new location.
> 
> No functional change.
> 
> Signed-off-by: Michael Kelley <mhklinux@outlook.com>

LGTM.

Reviewed-by: Petr Tesarik <ptesarik@suse.com>

Petr T

> ---
>  drivers/nvme/host/core.c | 4 ++--
>  drivers/nvme/host/nvme.h | 2 +-
>  drivers/nvme/host/tcp.c  | 3 ++-
>  3 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 33fa01c599ad..f1ce325471f1 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -4495,7 +4495,7 @@ int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
>  		set->reserved_tags = 2;
>  	set->numa_node = ctrl->numa_node;
>  	set->flags = BLK_MQ_F_NO_SCHED;
> -	if (ctrl->ops->flags & NVME_F_BLOCKING)
> +	if (ctrl->blocking)
>  		set->flags |= BLK_MQ_F_BLOCKING;
>  	set->cmd_size = cmd_size;
>  	set->driver_data = ctrl;
> @@ -4565,7 +4565,7 @@ int nvme_alloc_io_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
>  		set->reserved_tags = 1;
>  	set->numa_node = ctrl->numa_node;
>  	set->flags = BLK_MQ_F_SHOULD_MERGE;
> -	if (ctrl->ops->flags & NVME_F_BLOCKING)
> +	if (ctrl->blocking)
>  		set->flags |= BLK_MQ_F_BLOCKING;
>  	set->cmd_size = cmd_size,
>  	set->driver_data = ctrl;
> diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
> index ae5314d32943..28709f166cab 100644
> --- a/drivers/nvme/host/nvme.h
> +++ b/drivers/nvme/host/nvme.h
> @@ -338,6 +338,7 @@ struct nvme_ctrl {
>  	unsigned int shutdown_timeout;
>  	unsigned int kato;
>  	bool subsystem;
> +	bool blocking;
>  	unsigned long quirks;
>  	struct nvme_id_power_state psd[32];
>  	struct nvme_effects_log *effects;
> @@ -546,7 +547,6 @@ struct nvme_ctrl_ops {
>  	unsigned int flags;
>  #define NVME_F_FABRICS			(1 << 0)
>  #define NVME_F_METADATA_SUPPORTED	(1 << 1)
> -#define NVME_F_BLOCKING			(1 << 2)
>  
>  	const struct attribute_group **dev_attr_groups;
>  	int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
> diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
> index 9ea6be0b0392..6b9fdf7dc1ac 100644
> --- a/drivers/nvme/host/tcp.c
> +++ b/drivers/nvme/host/tcp.c
> @@ -2658,7 +2658,7 @@ static const struct blk_mq_ops nvme_tcp_admin_mq_ops = {
>  static const struct nvme_ctrl_ops nvme_tcp_ctrl_ops = {
>  	.name			= "tcp",
>  	.module			= THIS_MODULE,
> -	.flags			= NVME_F_FABRICS | NVME_F_BLOCKING,
> +	.flags			= NVME_F_FABRICS,
>  	.reg_read32		= nvmf_reg_read32,
>  	.reg_read64		= nvmf_reg_read64,
>  	.reg_write32		= nvmf_reg_write32,
> @@ -2762,6 +2762,7 @@ static struct nvme_tcp_ctrl *nvme_tcp_alloc_ctrl(struct device *dev,
>  	if (ret)
>  		goto out_kfree_queues;
>  
> +	ctrl->ctrl.blocking = true;
>  	return ctrl;
>  out_kfree_queues:
>  	kfree(ctrl->queues);

Patchew 2.1-devel-b67e4c2

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