diff options
Diffstat (limited to 'drivers/net/mlx4/eq.c')
| -rw-r--r-- | drivers/net/mlx4/eq.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/net/mlx4/eq.c b/drivers/net/mlx4/eq.c index 6d7b2bf210ce..552d0fce6f67 100644 --- a/drivers/net/mlx4/eq.c +++ b/drivers/net/mlx4/eq.c @@ -699,3 +699,47 @@ void mlx4_cleanup_eq_table(struct mlx4_dev *dev) kfree(priv->eq_table.uar_map); } + +/* A test that verifies that we can accept interrupts on all + * the irq vectors of the device. + * Interrupts are checked using the NOP command. + */ +int mlx4_test_interrupts(struct mlx4_dev *dev) +{ + struct mlx4_priv *priv = mlx4_priv(dev); + int i; + int err; + + err = mlx4_NOP(dev); + /* When not in MSI_X, there is only one irq to check */ + if (!(dev->flags & MLX4_FLAG_MSI_X)) + return err; + + /* A loop over all completion vectors, for each vector we will check + * whether it works by mapping command completions to that vector + * and performing a NOP command + */ + for(i = 0; !err && (i < dev->caps.num_comp_vectors); ++i) { + /* Temporary use polling for command completions */ + mlx4_cmd_use_polling(dev); + + /* Map the new eq to handle all asyncronous events */ + err = mlx4_MAP_EQ(dev, MLX4_ASYNC_EVENT_MASK, 0, + priv->eq_table.eq[i].eqn); + if (err) { + mlx4_warn(dev, "Failed mapping eq for interrupt test\n"); + mlx4_cmd_use_events(dev); + break; + } + + /* Go back to using events */ + mlx4_cmd_use_events(dev); + err = mlx4_NOP(dev); + } + + /* Return to default */ + mlx4_MAP_EQ(dev, MLX4_ASYNC_EVENT_MASK, 0, + priv->eq_table.eq[dev->caps.num_comp_vectors].eqn); + return err; +} +EXPORT_SYMBOL(mlx4_test_interrupts); |