Merge branch 'master' into csb1725

[mv-sheeva.git] / drivers / net / mlx4 / eq.c

diff --git a/drivers/net/mlx4/eq.c b/drivers/net/mlx4/eq.c
index 6d7b2bf210ceb8818a811699d179819304df8510..552d0fce6f671a50da289aa5b7d96f5ce05fb874 100644 (file)
--- 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);