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net/mlx5: Store the global doorbell in mlx5_priv

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The global doorbell is used for more than just Ethernet resources, so
move it out of mlx5e_hw_objs into a common place (mlx5_priv), to avoid
non-Ethernet modules (e.g. HWS, ASO) depending on Ethernet structs.

Use this opportunity to consolidate it with the 'uar' pointer already
there, which was used as an RX doorbell. Underneath the 'uar' pointer is
identical to 'bfreg->up', so store a single resource and use that
instead.

For CQ doorbells, care is taken to always use bfreg->up->index instead
of bfreg->index, which may refer to a subsequent UAR page from the same
ALLOC_UAR batch on some NICs.

This paves the way for cleanly supporting multiple doorbells in the
Ethernet driver.

Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Cosmin Ratiu
2025-09-16 17:11:38 +03:00
committed by Jakub Kicinski
parent 913d28f8a7
commit aa4595d0ad
12 changed files with 29 additions and 40 deletions
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3
include/linux/mlx5/driver.h
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@@ -612,7 +612,7 @@ struct mlx5_priv {
struct mlx5_ft_pool *ft_pool;
struct mlx5_bfreg_data bfregs;
struct mlx5_uars_page *uar;
struct mlx5_sq_bfreg bfreg;
#ifdef CONFIG_MLX5_SF
struct mlx5_vhca_state_notifier *vhca_state_notifier;
struct mlx5_sf_dev_table *sf_dev_table;
@@ -658,7 +658,6 @@ struct mlx5e_resources {
u32 pdn;
struct mlx5_td td;
u32 mkey;
struct mlx5_sq_bfreg bfreg;
#define MLX5_MAX_NUM_TC 8
u32 tisn[MLX5_MAX_PORTS][MLX5_MAX_NUM_TC];
bool tisn_valid;