net/mlx5: Use set number of max EQs

If a maximum number of EQs has been set for an SF, use that amount.

Signed-off-by: Daniel Jurgens <danielj@nvidia.com>
Reviewed-by: William Tu <witu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Link: https://patch.msgid.link/20240712003310.355106-5-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: danielj-mellanox

drivers/net/ethernet/mellanox/mlx5/core/eq.c

@@ -1187,7 +1187,6 @@ static int get_num_eqs(struct mlx5_core_dev *dev)
 {
 	struct mlx5_eq_table *eq_table = dev->priv.eq_table;
 	int max_dev_eqs;
-	int max_eqs_sf;
 	int num_eqs;
 
 	/* If ethernet is disabled we use just a single completion vector to
@@ -1202,7 +1201,11 @@ static int get_num_eqs(struct mlx5_core_dev *dev)
 	num_eqs = min_t(int, mlx5_irq_table_get_num_comp(eq_table->irq_table),
 			max_dev_eqs - MLX5_MAX_ASYNC_EQS);
 	if (mlx5_core_is_sf(dev)) {
-		max_eqs_sf = min_t(int, MLX5_COMP_EQS_PER_SF,
+		int max_eqs_sf = MLX5_CAP_GEN_2(dev, sf_eq_usage) ?
+				 MLX5_CAP_GEN_2(dev, max_num_eqs_24b) :
+				 MLX5_COMP_EQS_PER_SF;
+
+		max_eqs_sf = min_t(int, max_eqs_sf,
 				   mlx5_irq_table_get_sfs_vec(eq_table->irq_table));
 		num_eqs = min_t(int, num_eqs, max_eqs_sf);
 	}

drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c

@@ -16,6 +16,7 @@
 #endif
 
 #define MLX5_SFS_PER_CTRL_IRQ 64
+#define MLX5_MAX_MSIX_PER_SF 256
 #define MLX5_IRQ_CTRL_SF_MAX 8
 /* min num of vectors for SFs to be enabled */
 #define MLX5_IRQ_VEC_COMP_BASE_SF 2
@@ -589,8 +590,6 @@ static void irq_pool_free(struct mlx5_irq_pool *pool)
 static int irq_pools_init(struct mlx5_core_dev *dev, int sf_vec, int pcif_vec)
 {
 	struct mlx5_irq_table *table = dev->priv.irq_table;
-	int num_sf_ctrl_by_msix;
-	int num_sf_ctrl_by_sfs;
 	int num_sf_ctrl;
 	int err;
 
@@ -608,10 +607,8 @@ static int irq_pools_init(struct mlx5_core_dev *dev, int sf_vec, int pcif_vec)
 	}
 
 	/* init sf_ctrl_pool */
-	num_sf_ctrl_by_msix = DIV_ROUND_UP(sf_vec, MLX5_COMP_EQS_PER_SF);
-	num_sf_ctrl_by_sfs = DIV_ROUND_UP(mlx5_sf_max_functions(dev),
-					  MLX5_SFS_PER_CTRL_IRQ);
-	num_sf_ctrl = min_t(int, num_sf_ctrl_by_msix, num_sf_ctrl_by_sfs);
+	num_sf_ctrl = DIV_ROUND_UP(mlx5_sf_max_functions(dev),
+				   MLX5_SFS_PER_CTRL_IRQ);
 	num_sf_ctrl = min_t(int, MLX5_IRQ_CTRL_SF_MAX, num_sf_ctrl);
 	table->sf_ctrl_pool = irq_pool_alloc(dev, pcif_vec, num_sf_ctrl,
 					     "mlx5_sf_ctrl",
@@ -726,8 +723,7 @@ int mlx5_irq_table_create(struct mlx5_core_dev *dev)
 
 	total_vec = pcif_vec;
 	if (mlx5_sf_max_functions(dev))
-		total_vec += MLX5_IRQ_CTRL_SF_MAX +
-			MLX5_COMP_EQS_PER_SF * mlx5_sf_max_functions(dev);
+		total_vec += MLX5_MAX_MSIX_PER_SF * mlx5_sf_max_functions(dev);
 	total_vec = min_t(int, total_vec, pci_msix_vec_count(dev->pdev));
 	pcif_vec = min_t(int, pcif_vec, pci_msix_vec_count(dev->pdev));