diff options
author | Yevgeny Petrilin <yevgenyp@mellanox.co.il> | 2008-12-22 07:15:03 -0800 |
---|---|---|
committer | Roland Dreier <rolandd@cisco.com> | 2008-12-22 07:15:03 -0800 |
commit | b8dd786f9417e5885929bfe33a235c76a9c1c569 (patch) | |
tree | 16b38c672980d142ffa0ac0ccdeb4af19c20cc31 /drivers/net/mlx4/main.c | |
parent | 061e41fdb5047b1fb161e89664057835935ca1d2 (diff) | |
download | linux-b8dd786f9417e5885929bfe33a235c76a9c1c569.tar.gz linux-b8dd786f9417e5885929bfe33a235c76a9c1c569.tar.bz2 linux-b8dd786f9417e5885929bfe33a235c76a9c1c569.zip |
mlx4_core: Add support for multiple completion event vectors
When using MSI-X mode, create a completion event queue for each CPU.
Report the number of completion EQs in a new struct mlx4_caps member,
num_comp_vectors, and extend the mlx4_cq_alloc() interface with a
vector parameter so that consumers can specify which completion EQ
should be used to report events for the CQ being created.
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/net/mlx4/main.c')
-rw-r--r-- | drivers/net/mlx4/main.c | 53 |
1 files changed, 39 insertions, 14 deletions
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c index 90a0281d15ea..710c79e7a2db 100644 --- a/drivers/net/mlx4/main.c +++ b/drivers/net/mlx4/main.c @@ -421,9 +421,7 @@ static int mlx4_init_cmpt_table(struct mlx4_dev *dev, u64 cmpt_base, ((u64) (MLX4_CMPT_TYPE_EQ * cmpt_entry_sz) << MLX4_CMPT_SHIFT), cmpt_entry_sz, - roundup_pow_of_two(MLX4_NUM_EQ + - dev->caps.reserved_eqs), - MLX4_NUM_EQ + dev->caps.reserved_eqs, 0, 0); + dev->caps.num_eqs, dev->caps.num_eqs, 0, 0); if (err) goto err_cq; @@ -810,12 +808,12 @@ static int mlx4_setup_hca(struct mlx4_dev *dev) if (dev->flags & MLX4_FLAG_MSI_X) { mlx4_warn(dev, "NOP command failed to generate MSI-X " "interrupt IRQ %d).\n", - priv->eq_table.eq[MLX4_EQ_ASYNC].irq); + priv->eq_table.eq[dev->caps.num_comp_vectors].irq); mlx4_warn(dev, "Trying again without MSI-X.\n"); } else { mlx4_err(dev, "NOP command failed to generate interrupt " "(IRQ %d), aborting.\n", - priv->eq_table.eq[MLX4_EQ_ASYNC].irq); + priv->eq_table.eq[dev->caps.num_comp_vectors].irq); mlx4_err(dev, "BIOS or ACPI interrupt routing problem?\n"); } @@ -908,31 +906,50 @@ err_uar_table_free: static void mlx4_enable_msi_x(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); - struct msix_entry entries[MLX4_NUM_EQ]; + struct msix_entry *entries; + int nreq; int err; int i; if (msi_x) { - for (i = 0; i < MLX4_NUM_EQ; ++i) + nreq = min(dev->caps.num_eqs - dev->caps.reserved_eqs, + num_possible_cpus() + 1); + entries = kcalloc(nreq, sizeof *entries, GFP_KERNEL); + if (!entries) + goto no_msi; + + for (i = 0; i < nreq; ++i) entries[i].entry = i; - err = pci_enable_msix(dev->pdev, entries, ARRAY_SIZE(entries)); + retry: + err = pci_enable_msix(dev->pdev, entries, nreq); if (err) { - if (err > 0) - mlx4_info(dev, "Only %d MSI-X vectors available, " - "not using MSI-X\n", err); + /* Try again if at least 2 vectors are available */ + if (err > 1) { + mlx4_info(dev, "Requested %d vectors, " + "but only %d MSI-X vectors available, " + "trying again\n", nreq, err); + nreq = err; + goto retry; + } + goto no_msi; } - for (i = 0; i < MLX4_NUM_EQ; ++i) + dev->caps.num_comp_vectors = nreq - 1; + for (i = 0; i < nreq; ++i) priv->eq_table.eq[i].irq = entries[i].vector; dev->flags |= MLX4_FLAG_MSI_X; + + kfree(entries); return; } no_msi: - for (i = 0; i < MLX4_NUM_EQ; ++i) + dev->caps.num_comp_vectors = 1; + + for (i = 0; i < 2; ++i) priv->eq_table.eq[i].irq = dev->pdev->irq; } @@ -1074,6 +1091,10 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id) if (err) goto err_cmd; + err = mlx4_alloc_eq_table(dev); + if (err) + goto err_close; + mlx4_enable_msi_x(dev); err = mlx4_setup_hca(dev); @@ -1084,7 +1105,7 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id) } if (err) - goto err_close; + goto err_free_eq; for (port = 1; port <= dev->caps.num_ports; port++) { err = mlx4_init_port_info(dev, port); @@ -1114,6 +1135,9 @@ err_port: mlx4_cleanup_pd_table(dev); mlx4_cleanup_uar_table(dev); +err_free_eq: + mlx4_free_eq_table(dev); + err_close: if (dev->flags & MLX4_FLAG_MSI_X) pci_disable_msix(pdev); @@ -1177,6 +1201,7 @@ static void mlx4_remove_one(struct pci_dev *pdev) iounmap(priv->kar); mlx4_uar_free(dev, &priv->driver_uar); mlx4_cleanup_uar_table(dev); + mlx4_free_eq_table(dev); mlx4_close_hca(dev); mlx4_cmd_cleanup(dev); |