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authorMichael S. Tsirkin <mst@dev.mellanox.co.il>2007-08-07 16:08:28 +0300
committerRoland Dreier <rolandd@cisco.com>2007-10-09 19:59:05 -0700
commit08fb105540f4649eaa25270ec3ada1d35406afcc (patch)
tree5b2032fb7c687c7c0a6b6aba5e695233532b2f66 /drivers/net/mlx4/main.c
parent8a68bbe31d51cc75d2acf1c9f5ceff91f7662ea4 (diff)
mlx4_core: Enable MSI-X by default
Recover from MSI-X errors by automatically falling back on regular interrupt, instead of asking the user to do this manually. This makes it possible to enable MSI-X by default, and will make it possible to get rid of the msi_x module option in the future. Signed-off-by: Michael S. Tsirkin <mst@dev.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.c34
1 files changed, 22 insertions, 12 deletions
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index 4dc9dc19b71..4b126943558 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -61,7 +61,7 @@ MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
#ifdef CONFIG_PCI_MSI
-static int msi_x;
+static int msi_x = 1;
module_param(msi_x, int, 0444);
MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
@@ -599,13 +599,17 @@ static int __devinit mlx4_setup_hca(struct mlx4_dev *dev)
err = mlx4_NOP(dev);
if (err) {
- mlx4_err(dev, "NOP command failed to generate interrupt "
- "(IRQ %d), aborting.\n",
- priv->eq_table.eq[MLX4_EQ_ASYNC].irq);
- if (dev->flags & MLX4_FLAG_MSI_X)
- mlx4_err(dev, "Try again with MSI-X disabled.\n");
- else
+ 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);
+ 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);
mlx4_err(dev, "BIOS or ACPI interrupt routing problem?\n");
+ }
goto err_cmd_poll;
}
@@ -803,8 +807,6 @@ static int __devinit mlx4_init_one(struct pci_dev *pdev,
goto err_free_dev;
}
- mlx4_enable_msi_x(dev);
-
if (mlx4_cmd_init(dev)) {
mlx4_err(dev, "Failed to init command interface, aborting.\n");
goto err_free_dev;
@@ -814,7 +816,15 @@ static int __devinit mlx4_init_one(struct pci_dev *pdev,
if (err)
goto err_cmd;
+ mlx4_enable_msi_x(dev);
+
err = mlx4_setup_hca(dev);
+ if (err == -EBUSY && (dev->flags & MLX4_FLAG_MSI_X)) {
+ dev->flags &= ~MLX4_FLAG_MSI_X;
+ pci_disable_msix(pdev);
+ err = mlx4_setup_hca(dev);
+ }
+
if (err)
goto err_close;
@@ -838,15 +848,15 @@ err_cleanup:
mlx4_cleanup_uar_table(dev);
err_close:
+ if (dev->flags & MLX4_FLAG_MSI_X)
+ pci_disable_msix(pdev);
+
mlx4_close_hca(dev);
err_cmd:
mlx4_cmd_cleanup(dev);
err_free_dev:
- if (dev->flags & MLX4_FLAG_MSI_X)
- pci_disable_msix(pdev);
-
kfree(priv);
err_release_bar2: