net/mlx5: Use max_num_eqs_24b capability if set

A new capability with more bits is added. If it's set use that value as
the maximum number of EQs available.

This cap is also writable by the vhca_resource_manager to allow limiting
the number of EQs available to SFs and VFs.

Fixes: 93197c7 ("mlx5/core: Support max_io_eqs for a function")
Signed-off-by: Daniel Jurgens <[email protected]>
Reviewed-by: Parav Pandit <[email protected]>
Reviewed-by: William Tu <[email protected]>
Signed-off-by: Tariq Toukan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: danielj-mellanox

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

@@ -1197,9 +1197,7 @@ static int get_num_eqs(struct mlx5_core_dev *dev)
 	if (!mlx5_core_is_eth_enabled(dev) && mlx5_eth_supported(dev))
 		return 1;
 
-	max_dev_eqs = MLX5_CAP_GEN(dev, max_num_eqs) ?
-		      MLX5_CAP_GEN(dev, max_num_eqs) :
-		      1 << MLX5_CAP_GEN(dev, log_max_eq);
+	max_dev_eqs = mlx5_max_eq_cap_get(dev);
 
 	num_eqs = min_t(int, mlx5_irq_table_get_num_comp(eq_table->irq_table),
 			max_dev_eqs - MLX5_MAX_ASYNC_EQS);

drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h

@@ -383,4 +383,14 @@ static inline int mlx5_vport_to_func_id(const struct mlx5_core_dev *dev, u16 vpo
 			  : vport;
 }
 
+static inline int mlx5_max_eq_cap_get(const struct mlx5_core_dev *dev)
+{
+	if (MLX5_CAP_GEN_2(dev, max_num_eqs_24b))
+		return MLX5_CAP_GEN_2(dev, max_num_eqs_24b);
+
+	if (MLX5_CAP_GEN(dev, max_num_eqs))
+		return MLX5_CAP_GEN(dev, max_num_eqs);
+
+	return 1 << MLX5_CAP_GEN(dev, log_max_eq);
+}
 #endif /* __MLX5_CORE_H__ */

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

@@ -711,9 +711,7 @@ int mlx5_irq_table_get_num_comp(struct mlx5_irq_table *table)
 
 int mlx5_irq_table_create(struct mlx5_core_dev *dev)
 {
-	int num_eqs = MLX5_CAP_GEN(dev, max_num_eqs) ?
-		      MLX5_CAP_GEN(dev, max_num_eqs) :
-		      1 << MLX5_CAP_GEN(dev, log_max_eq);
+	int num_eqs = mlx5_max_eq_cap_get(dev);
 	int total_vec;
 	int pcif_vec;
 	int req_vec;