From: "Dr. David Alan Gilbert" <linux@treblig.org>

mlx5dr_domain_sync() was added in 2019 by
commit 70605ea545e8 ("net/mlx5: DR, Expose APIs for direct rule managing")
but hasn't been used.

Remove it.

mlx5dr_domain_sync() was the only user of
mlx5dr_send_ring_force_drain().
Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
---
 .../mlx5/core/steering/sws/dr_domain.c        | 24 --------------
 .../mellanox/mlx5/core/steering/sws/dr_send.c | 33 -------------------
 .../mlx5/core/steering/sws/dr_types.h         |  1 -
 .../mellanox/mlx5/core/steering/sws/mlx5dr.h  |  2 --
 4 files changed, 60 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_domain.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_domain.c
index 60cb4527588a..65740bb68b09 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_domain.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_domain.c
@@ -516,30 +516,6 @@ mlx5dr_domain_create(struct mlx5_core_dev *mdev, enum mlx5dr_domain_type type)
 	return NULL;
 }
 
-/* Assure synchronization of the device steering tables with updates made by SW
- * insertion.
- */
-int mlx5dr_domain_sync(struct mlx5dr_domain *dmn, u32 flags)
-{
-	int ret = 0;
-
-	if (flags & MLX5DR_DOMAIN_SYNC_FLAGS_SW) {
-		mlx5dr_domain_lock(dmn);
-		ret = mlx5dr_send_ring_force_drain(dmn);
-		mlx5dr_domain_unlock(dmn);
-		if (ret) {
-			mlx5dr_err(dmn, "Force drain failed flags: %d, ret: %d\n",
-				   flags, ret);
-			return ret;
-		}
-	}
-
-	if (flags & MLX5DR_DOMAIN_SYNC_FLAGS_HW)
-		ret = mlx5dr_cmd_sync_steering(dmn->mdev);
-
-	return ret;
-}
-
 int mlx5dr_domain_destroy(struct mlx5dr_domain *dmn)
 {
 	if (WARN_ON_ONCE(refcount_read(&dmn->refcount) > 1))
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_send.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_send.c
index f57c84e5128b..4fd4e8483382 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_send.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_send.c
@@ -1331,36 +1331,3 @@ void mlx5dr_send_ring_free(struct mlx5dr_domain *dmn,
 	kfree(send_ring->sync_buff);
 	kfree(send_ring);
 }
-
-int mlx5dr_send_ring_force_drain(struct mlx5dr_domain *dmn)
-{
-	struct mlx5dr_send_ring *send_ring = dmn->send_ring;
-	struct postsend_info send_info = {};
-	u8 data[DR_STE_SIZE];
-	int num_of_sends_req;
-	int ret;
-	int i;
-
-	/* Sending this amount of requests makes sure we will get drain */
-	num_of_sends_req = send_ring->signal_th * TH_NUMS_TO_DRAIN / 2;
-
-	/* Send fake requests forcing the last to be signaled */
-	send_info.write.addr = (uintptr_t)data;
-	send_info.write.length = DR_STE_SIZE;
-	send_info.write.lkey = 0;
-	/* Using the sync_mr in order to write/read */
-	send_info.remote_addr = (uintptr_t)send_ring->sync_mr->addr;
-	send_info.rkey = send_ring->sync_mr->mkey;
-
-	for (i = 0; i < num_of_sends_req; i++) {
-		ret = dr_postsend_icm_data(dmn, &send_info);
-		if (ret)
-			return ret;
-	}
-
-	spin_lock(&send_ring->lock);
-	ret = dr_handle_pending_wc(dmn, send_ring);
-	spin_unlock(&send_ring->lock);
-
-	return ret;
-}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_types.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_types.h
index 7618c6147f86..cc328292bf84 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_types.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/dr_types.h
@@ -1473,7 +1473,6 @@ struct mlx5dr_send_ring {
 int mlx5dr_send_ring_alloc(struct mlx5dr_domain *dmn);
 void mlx5dr_send_ring_free(struct mlx5dr_domain *dmn,
 			   struct mlx5dr_send_ring *send_ring);
-int mlx5dr_send_ring_force_drain(struct mlx5dr_domain *dmn);
 int mlx5dr_send_postsend_ste(struct mlx5dr_domain *dmn,
 			     struct mlx5dr_ste *ste,
 			     u8 *data,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/mlx5dr.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/mlx5dr.h
index 0bb3724c10c2..fc8a2169d1a1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/mlx5dr.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/sws/mlx5dr.h
@@ -45,8 +45,6 @@ mlx5dr_domain_create(struct mlx5_core_dev *mdev, enum mlx5dr_domain_type type);
 
 int mlx5dr_domain_destroy(struct mlx5dr_domain *domain);
 
-int mlx5dr_domain_sync(struct mlx5dr_domain *domain, u32 flags);
-
 void mlx5dr_domain_set_peer(struct mlx5dr_domain *dmn,
 			    struct mlx5dr_domain *peer_dmn,
 			    u16 peer_vhca_id);
-- 
2.48.1

On Tue, Feb 4, 2025 at 12:30 AM <linux@treblig.org> wrote:
>
> From: "Dr. David Alan Gilbert" <linux@treblig.org>
>
> mlx5dr_domain_sync() was added in 2019 by
> commit 70605ea545e8 ("net/mlx5: DR, Expose APIs for direct rule managing")
> but hasn't been used.
>
> Remove it.
>
> mlx5dr_domain_sync() was the only user of
> mlx5dr_send_ring_force_drain().
> Remove it.
>
> Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
LGTM,
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>


-- 
Regards,
Kalesh AP

On 03/02/2025 20:59, linux@treblig.org wrote:
> From: "Dr. David Alan Gilbert" <linux@treblig.org>
> 
> mlx5dr_domain_sync() was added in 2019 by
> commit 70605ea545e8 ("net/mlx5: DR, Expose APIs for direct rule managing")
> but hasn't been used.
> 
> Remove it.
> 
> mlx5dr_domain_sync() was the only user of
> mlx5dr_send_ring_force_drain().
> Remove it.
> 
> Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
> ---
>   .../mlx5/core/steering/sws/dr_domain.c        | 24 --------------
>   .../mellanox/mlx5/core/steering/sws/dr_send.c | 33 -------------------
>   .../mlx5/core/steering/sws/dr_types.h         |  1 -
>   .../mellanox/mlx5/core/steering/sws/mlx5dr.h  |  2 --
>   4 files changed, 60 deletions(-)
> 

Thanks for your patch.

Reviewed-by: Tariq Toukan <tariqt@nvidia.com>

Tariq.