net/mlx4: Fix firmware command timeout during interrupt test

Currently interrupt test that is part of ethtool selftest runs the
check over all interrupt vectors of the device.
In mlx4_en package part of interrupt vectors are uninitialized since
mlx4_ib doesn't exist. This causes NOP FW command to time out.
Change logic to test current port interrupt vectors only.

Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_selftest.c b/drivers/net/ethernet/mellanox/mlx4/en_selftest.c
index b66e03d..c06346a 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/en_selftest.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_selftest.c
@@ -118,6 +118,29 @@ mlx4_en_test_loopback_exit:
        return !loopback_ok;
 }
 
+static int mlx4_en_test_interrupts(struct mlx4_en_priv *priv)
+{
+       struct mlx4_en_dev *mdev = priv->mdev;
+       int err = 0;
+       int i = 0;
+
+       err = mlx4_test_async(mdev->dev);
+       /* When not in MSI_X or slave, test only async */
+       if (!(mdev->dev->flags & MLX4_FLAG_MSI_X) || mlx4_is_slave(mdev->dev))
+               return err;
+
+       /* A loop over all completion vectors of current port,
+        * for each vector check whether it works by mapping command
+        * completions to that vector and performing a NOP command
+        */
+       for (i = 0; i < priv->rx_ring_num; i++) {
+               err = mlx4_test_interrupt(mdev->dev, priv->rx_cq[i]->vector);
+               if (err)
+                       break;
+       }
+
+       return err;
+}
 
 static int mlx4_en_test_link(struct mlx4_en_priv *priv)
 {
@@ -151,7 +174,6 @@ static int mlx4_en_test_speed(struct mlx4_en_priv *priv)
 void mlx4_en_ex_selftest(struct net_device *dev, u32 *flags, u64 *buf)
 {
        struct mlx4_en_priv *priv = netdev_priv(dev);
-       struct mlx4_en_dev *mdev = priv->mdev;
        int i, carrier_ok;
 
        memset(buf, 0, sizeof(u64) * MLX4_EN_NUM_SELF_TEST);
@@ -177,7 +199,7 @@ void mlx4_en_ex_selftest(struct net_device *dev, u32 *flags, u64 *buf)
                        netif_carrier_on(dev);
 
        }
-       buf[0] = mlx4_test_interrupts(mdev->dev);
+       buf[0] = mlx4_en_test_interrupts(priv);
        buf[1] = mlx4_en_test_link(priv);
        buf[2] = mlx4_en_test_speed(priv);
 

diff --git a/drivers/net/ethernet/mellanox/mlx4/eq.c b/drivers/net/ethernet/mellanox/mlx4/eq.c
index cf8f8a7..cd3638e 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/eq.c
@@ -1361,53 +1361,49 @@ 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.
+/* A test that verifies that we can accept interrupts
+ * on the vector allocated for asynchronous events
+ */
+int mlx4_test_async(struct mlx4_dev *dev)
+{
+       return mlx4_NOP(dev);
+}
+EXPORT_SYMBOL(mlx4_test_async);
+
+/* A test that verifies that we can accept interrupts
+ * on the given irq vector of the tested port.
  * Interrupts are checked using the NOP command.
  */
-int mlx4_test_interrupts(struct mlx4_dev *dev)
+int mlx4_test_interrupt(struct mlx4_dev *dev, int vector)
 {
        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) || mlx4_is_slave(dev))
-               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) {
-               /* Make sure request_irq was called */
-               if (!priv->eq_table.eq[i].have_irq)
-                       continue;
-
-               /* Temporary use polling for command completions */
-               mlx4_cmd_use_polling(dev);
-
-               /* Map the new eq to handle all asynchronous events */
-               err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 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;
-               }
+       /* Temporary use polling for command completions */
+       mlx4_cmd_use_polling(dev);
 
-               /* Go back to using events */
-               mlx4_cmd_use_events(dev);
-               err = mlx4_NOP(dev);
+       /* Map the new eq to handle all asynchronous events */
+       err = mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
+                         priv->eq_table.eq[MLX4_CQ_TO_EQ_VECTOR(vector)].eqn);
+       if (err) {
+               mlx4_warn(dev, "Failed mapping eq for interrupt test\n");
+               goto out;
        }
 
+       /* Go back to using events */
+       mlx4_cmd_use_events(dev);
+       err = mlx4_NOP(dev);
+
        /* Return to default */
+       mlx4_cmd_use_polling(dev);
+out:
        mlx4_MAP_EQ(dev, get_async_ev_mask(dev), 0,
                    priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
+       mlx4_cmd_use_events(dev);
+
        return err;
 }
-EXPORT_SYMBOL(mlx4_test_interrupts);
+EXPORT_SYMBOL(mlx4_test_interrupt);
 
 bool mlx4_is_eq_vector_valid(struct mlx4_dev *dev, u8 port, int vector)
 {

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index f6a1642..3be7abd 100644 (file)
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -1399,7 +1399,8 @@ void mlx4_fmr_unmap(struct mlx4_dev *dev, struct mlx4_fmr *fmr,
                    u32 *lkey, u32 *rkey);
 int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr);
 int mlx4_SYNC_TPT(struct mlx4_dev *dev);
-int mlx4_test_interrupts(struct mlx4_dev *dev);
+int mlx4_test_interrupt(struct mlx4_dev *dev, int vector);
+int mlx4_test_async(struct mlx4_dev *dev);
 int mlx4_query_diag_counters(struct mlx4_dev *dev, u8 op_modifier,
                             const u32 offset[], u32 value[],
                             size_t array_len, u8 port);