mlx4_en: Added self diagnostics test implementation
The selftest includes 5 features:
1. Interrupt test: Executing commands and receiving command completion
on all our interrupt vectors.
2. Link test: Verifying we are connected to valid link partner.
3. Speed test: Check that we negotiated link speed correctly.
4. Registers test: Activate HW health check command.
5. Loopback test: Send a packet on loopback interface and catch it on RX side.
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/mlx4/en_selftest.c b/drivers/net/mlx4/en_selftest.c
new file mode 100644
index 0000000..43357d3
--- /dev/null
+++ b/drivers/net/mlx4/en_selftest.c
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include <linux/mlx4/driver.h>
+
+#include "mlx4_en.h"
+
+
+static int mlx4_en_test_registers(struct mlx4_en_priv *priv)
+{
+ return mlx4_cmd(priv->mdev->dev, 0, 0, 0, MLX4_CMD_HW_HEALTH_CHECK,
+ MLX4_CMD_TIME_CLASS_A);
+}
+
+static int mlx4_en_test_loopback_xmit(struct mlx4_en_priv *priv)
+{
+ struct sk_buff *skb;
+ struct ethhdr *ethh;
+ unsigned char *packet;
+ unsigned int packet_size = MLX4_LOOPBACK_TEST_PAYLOAD;
+ unsigned int i;
+ int err;
+
+
+ /* build the pkt before xmit */
+ skb = netdev_alloc_skb(priv->dev, MLX4_LOOPBACK_TEST_PAYLOAD + ETH_HLEN + NET_IP_ALIGN);
+ if (!skb) {
+ en_err(priv, "-LOOPBACK_TEST_XMIT- failed to create skb for xmit\n");
+ return -ENOMEM;
+ }
+ skb_reserve(skb, NET_IP_ALIGN);
+
+ ethh = (struct ethhdr *)skb_put(skb, sizeof(struct ethhdr));
+ packet = (unsigned char *)skb_put(skb, packet_size);
+ memcpy(ethh->h_dest, priv->dev->dev_addr, ETH_ALEN);
+ memset(ethh->h_source, 0, ETH_ALEN);
+ ethh->h_proto = htons(ETH_P_ARP);
+ skb_set_mac_header(skb, 0);
+ for (i = 0; i < packet_size; ++i) /* fill our packet */
+ packet[i] = (unsigned char)(i & 0xff);
+
+ /* xmit the pkt */
+ err = mlx4_en_xmit(skb, priv->dev);
+ return err;
+}
+
+static int mlx4_en_test_loopback(struct mlx4_en_priv *priv)
+{
+ u32 loopback_ok = 0;
+ int i;
+
+
+ priv->loopback_ok = 0;
+ priv->validate_loopback = 1;
+
+ /* xmit */
+ if (mlx4_en_test_loopback_xmit(priv)) {
+ en_err(priv, "Transmitting loopback packet failed\n");
+ goto mlx4_en_test_loopback_exit;
+ }
+
+ /* polling for result */
+ for (i = 0; i < MLX4_EN_LOOPBACK_RETRIES; ++i) {
+ msleep(MLX4_EN_LOOPBACK_TIMEOUT);
+ if (priv->loopback_ok) {
+ loopback_ok = 1;
+ break;
+ }
+ }
+ if (!loopback_ok)
+ en_err(priv, "Loopback packet didn't arrive\n");
+
+mlx4_en_test_loopback_exit:
+
+ priv->validate_loopback = 0;
+ return (!loopback_ok);
+}
+
+
+static int mlx4_en_test_link(struct mlx4_en_priv *priv)
+{
+ if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
+ return -ENOMEM;
+ if (priv->port_state.link_state == 1)
+ return 0;
+ else
+ return 1;
+}
+
+static int mlx4_en_test_speed(struct mlx4_en_priv *priv)
+{
+
+ if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
+ return -ENOMEM;
+
+ /* The device currently only supports 10G speed */
+ if (priv->port_state.link_speed != SPEED_10000)
+ return priv->port_state.link_speed;
+ return 0;
+}
+
+
+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;
+ struct mlx4_en_tx_ring *tx_ring;
+ int i, carrier_ok;
+
+ memset(buf, 0, sizeof(u64) * MLX4_EN_NUM_SELF_TEST);
+
+ if (*flags & ETH_TEST_FL_OFFLINE) {
+ /* disable the interface */
+ carrier_ok = netif_carrier_ok(dev);
+
+ netif_carrier_off(dev);
+retry_tx:
+ /* Wait untill all tx queues are empty.
+ * there should not be any additional incoming traffic
+ * since we turned the carrier off */
+ msleep(200);
+ for (i = 0; i < priv->tx_ring_num && carrier_ok; i++) {
+ tx_ring = &priv->tx_ring[i];
+ if (tx_ring->prod != (tx_ring->cons + tx_ring->last_nr_txbb))
+ goto retry_tx;
+ }
+
+ if (priv->mdev->dev->caps.loopback_support){
+ buf[3] = mlx4_en_test_registers(priv);
+ buf[4] = mlx4_en_test_loopback(priv);
+ }
+
+ if (carrier_ok)
+ netif_carrier_on(dev);
+
+ }
+ buf[0] = mlx4_test_interrupts(mdev->dev);
+ buf[1] = mlx4_en_test_link(priv);
+ buf[2] = mlx4_en_test_speed(priv);
+
+ for (i = 0; i < MLX4_EN_NUM_SELF_TEST; i++) {
+ if (buf[i])
+ *flags |= ETH_TEST_FL_FAILED;
+ }
+}