diff options
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c index 81a9232a03e1..7db9cab9bedf 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c @@ -593,9 +593,11 @@ static void irq_pool_free(struct mlx5_irq_pool *pool) kvfree(pool); } -static int irq_pools_init(struct mlx5_core_dev *dev, int sf_vec, int pcif_vec) +static int irq_pools_init(struct mlx5_core_dev *dev, int sf_vec, int pcif_vec, + bool dynamic_vec) { struct mlx5_irq_table *table = dev->priv.irq_table; + int sf_vec_available = sf_vec; int num_sf_ctrl; int err; @@ -616,6 +618,13 @@ static int irq_pools_init(struct mlx5_core_dev *dev, int sf_vec, int pcif_vec) 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); + if (!dynamic_vec && (num_sf_ctrl + 1) > sf_vec_available) { + mlx5_core_dbg(dev, + "Not enough IRQs for SFs control and completion pool, required=%d avail=%d\n", + num_sf_ctrl + 1, sf_vec_available); + return 0; + } + table->sf_ctrl_pool = irq_pool_alloc(dev, pcif_vec, num_sf_ctrl, "mlx5_sf_ctrl", MLX5_EQ_SHARE_IRQ_MIN_CTRL, @@ -624,9 +633,11 @@ static int irq_pools_init(struct mlx5_core_dev *dev, int sf_vec, int pcif_vec) err = PTR_ERR(table->sf_ctrl_pool); goto err_pf; } - /* init sf_comp_pool */ + sf_vec_available -= num_sf_ctrl; + + /* init sf_comp_pool, remaining vectors are for the SF completions */ table->sf_comp_pool = irq_pool_alloc(dev, pcif_vec + num_sf_ctrl, - sf_vec - num_sf_ctrl, "mlx5_sf_comp", + sf_vec_available, "mlx5_sf_comp", MLX5_EQ_SHARE_IRQ_MIN_COMP, MLX5_EQ_SHARE_IRQ_MAX_COMP); if (IS_ERR(table->sf_comp_pool)) { @@ -715,6 +726,7 @@ 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_max_eq_cap_get(dev); + bool dynamic_vec; int total_vec; int pcif_vec; int req_vec; @@ -724,21 +736,31 @@ int mlx5_irq_table_create(struct mlx5_core_dev *dev) if (mlx5_core_is_sf(dev)) return 0; + /* PCI PF vectors usage is limited by online cpus, device EQs and + * PCI MSI-X capability. + */ pcif_vec = MLX5_CAP_GEN(dev, num_ports) * num_online_cpus() + 1; pcif_vec = min_t(int, pcif_vec, num_eqs); + pcif_vec = min_t(int, pcif_vec, pci_msix_vec_count(dev->pdev)); total_vec = pcif_vec; if (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)); req_vec = pci_msix_can_alloc_dyn(dev->pdev) ? 1 : total_vec; n = pci_alloc_irq_vectors(dev->pdev, 1, req_vec, PCI_IRQ_MSIX); if (n < 0) return n; - err = irq_pools_init(dev, total_vec - pcif_vec, pcif_vec); + /* Further limit vectors of the pools based on platform for non dynamic case */ + dynamic_vec = pci_msix_can_alloc_dyn(dev->pdev); + if (!dynamic_vec) { + pcif_vec = min_t(int, n, pcif_vec); + total_vec = min_t(int, n, total_vec); + } + + err = irq_pools_init(dev, total_vec - pcif_vec, pcif_vec, dynamic_vec); if (err) pci_free_irq_vectors(dev->pdev); |