[mirror_ubuntu-bionic-kernel.git] / drivers / net / ethernet / mellanox / mlx4 / en_selftest.c

/*
 * 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, MLX4_CMD_WRAPPED);
}

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)
		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);
	eth_zero_addr(ethh->h_source);
	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;
	bool gro_enabled;

        priv->loopback_ok = 0;
	priv->validate_loopback = 1;
	gro_enabled = priv->dev->features & NETIF_F_GRO;

	mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
	priv->dev->features &= ~NETIF_F_GRO;

	/* 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;

	if (gro_enabled)
		priv->dev->features |= NETIF_F_GRO;

	mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
	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)
{
	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 supports 100M, 1G, 10G, 20G, 40G and 56G speed */
	if (priv->port_state.link_speed != SPEED_100 &&
	    priv->port_state.link_speed != SPEED_1000 &&
	    priv->port_state.link_speed != SPEED_10000 &&
	    priv->port_state.link_speed != SPEED_20000 &&
	    priv->port_state.link_speed != SPEED_40000 &&
	    priv->port_state.link_speed != SPEED_56000)
		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);
	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);
		/* Wait until all tx queues are empty.
		 * there should not be any additional incoming traffic
		 * since we turned the carrier off */
		msleep(200);

		if (priv->mdev->dev->caps.flags &
					MLX4_DEV_CAP_FLAG_UC_LOOPBACK) {
			buf[3] = mlx4_en_test_registers(priv);
			if (priv->port_up)
				buf[4] = mlx4_en_test_loopback(priv);
		}

		if (carrier_ok)
			netif_carrier_on(dev);

	}
	buf[0] = mlx4_en_test_interrupts(priv);
	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;
	}
}
Commit	Line	Data
e7c1c2c4 YP	1	/*
	2	* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
	3	*
	4	* This software is available to you under a choice of one of two
	5	* licenses. You may choose to be licensed under the terms of the GNU
	6	* General Public License (GPL) Version 2, available from the file
	7	* COPYING in the main directory of this source tree, or the
	8	* OpenIB.org BSD license below:
	9	*
	10	* Redistribution and use in source and binary forms, with or
	11	* without modification, are permitted provided that the following
	12	* conditions are met:
	13	*
	14	* - Redistributions of source code must retain the above
	15	* copyright notice, this list of conditions and the following
	16	* disclaimer.
	17	*
	18	* - Redistributions in binary form must reproduce the above
	19	* copyright notice, this list of conditions and the following
	20	* disclaimer in the documentation and/or other materials
	21	* provided with the distribution.
	22	*
	23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	27	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	28	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	29	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*
	32	*/
	33
	34	#include <linux/kernel.h>
	35	#include <linux/ethtool.h>
	36	#include <linux/netdevice.h>
	37	#include <linux/delay.h>
	38	#include <linux/mlx4/driver.h>
	39
	40	#include "mlx4_en.h"
	41
	42
	43	static int mlx4_en_test_registers(struct mlx4_en_priv *priv)
	44	{
	45	return mlx4_cmd(priv->mdev->dev, 0, 0, 0, MLX4_CMD_HW_HEALTH_CHECK,
f9baff50	46	MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
e7c1c2c4 YP	47	}
	48
	49	static int mlx4_en_test_loopback_xmit(struct mlx4_en_priv *priv)
	50	{
	51	struct sk_buff *skb;
	52	struct ethhdr *ethh;
	53	unsigned char *packet;
	54	unsigned int packet_size = MLX4_LOOPBACK_TEST_PAYLOAD;
	55	unsigned int i;
	56	int err;
	57
	58
	59	/* build the pkt before xmit */
	60	skb = netdev_alloc_skb(priv->dev, MLX4_LOOPBACK_TEST_PAYLOAD + ETH_HLEN + NET_IP_ALIGN);
720a43ef	61	if (!skb)
e7c1c2c4	62	return -ENOMEM;
720a43ef	63
e7c1c2c4 YP	64	skb_reserve(skb, NET_IP_ALIGN);
	65
	66	ethh = (struct ethhdr *)skb_put(skb, sizeof(struct ethhdr));
	67	packet = (unsigned char *)skb_put(skb, packet_size);
	68	memcpy(ethh->h_dest, priv->dev->dev_addr, ETH_ALEN);
c7bf7169	69	eth_zero_addr(ethh->h_source);
e7c1c2c4 YP	70	ethh->h_proto = htons(ETH_P_ARP);
	71	skb_set_mac_header(skb, 0);
	72	for (i = 0; i < packet_size; ++i) /* fill our packet */
	73	packet[i] = (unsigned char)(i & 0xff);
	74
	75	/* xmit the pkt */
	76	err = mlx4_en_xmit(skb, priv->dev);
	77	return err;
	78	}
	79
	80	static int mlx4_en_test_loopback(struct mlx4_en_priv *priv)
	81	{
	82	u32 loopback_ok = 0;
	83	int i;
1037ebbb	84	bool gro_enabled;
e7c1c2c4 YP	85
	86	priv->loopback_ok = 0;
	87	priv->validate_loopback = 1;
1037ebbb	88	gro_enabled = priv->dev->features & NETIF_F_GRO;
e7c1c2c4	89
79aeaccd	90	mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
1037ebbb	91	priv->dev->features &= ~NETIF_F_GRO;
79aeaccd	92
e7c1c2c4 YP	93	/* xmit */
	94	if (mlx4_en_test_loopback_xmit(priv)) {
	95	en_err(priv, "Transmitting loopback packet failed\n");
	96	goto mlx4_en_test_loopback_exit;
	97	}
	98
	99	/* polling for result */
	100	for (i = 0; i < MLX4_EN_LOOPBACK_RETRIES; ++i) {
	101	msleep(MLX4_EN_LOOPBACK_TIMEOUT);
	102	if (priv->loopback_ok) {
	103	loopback_ok = 1;
	104	break;
	105	}
	106	}
	107	if (!loopback_ok)
	108	en_err(priv, "Loopback packet didn't arrive\n");
	109
	110	mlx4_en_test_loopback_exit:
	111
	112	priv->validate_loopback = 0;
1037ebbb IS	113
	114	if (gro_enabled)
	115	priv->dev->features \|= NETIF_F_GRO;
	116
79aeaccd	117	mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
807540ba	118	return !loopback_ok;
e7c1c2c4 YP	119	}
e7c1c2c4 YP	120
6f2e0d2c EE	121	static int mlx4_en_test_interrupts(struct mlx4_en_priv *priv)
	122	{
	123	struct mlx4_en_dev *mdev = priv->mdev;
	124	int err = 0;
	125	int i = 0;
	126
	127	err = mlx4_test_async(mdev->dev);
	128	/* When not in MSI_X or slave, test only async */
	129	if (!(mdev->dev->flags & MLX4_FLAG_MSI_X) \|\| mlx4_is_slave(mdev->dev))
	130	return err;
	131
	132	/* A loop over all completion vectors of current port,
	133	* for each vector check whether it works by mapping command
	134	* completions to that vector and performing a NOP command
	135	*/
	136	for (i = 0; i < priv->rx_ring_num; i++) {
	137	err = mlx4_test_interrupt(mdev->dev, priv->rx_cq[i]->vector);
	138	if (err)
	139	break;
	140	}
	141
	142	return err;
	143	}
e7c1c2c4 YP	144
	145	static int mlx4_en_test_link(struct mlx4_en_priv *priv)
	146	{
	147	if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
	148	return -ENOMEM;
	149	if (priv->port_state.link_state == 1)
	150	return 0;
	151	else
	152	return 1;
	153	}
	154
	155	static int mlx4_en_test_speed(struct mlx4_en_priv *priv)
	156	{
	157
	158	if (mlx4_en_QUERY_PORT(priv->mdev, priv->port))
	159	return -ENOMEM;
	160
dcf972a3 SM	161	/* The device supports 100M, 1G, 10G, 20G, 40G and 56G speed */
	162	if (priv->port_state.link_speed != SPEED_100 &&
	163	priv->port_state.link_speed != SPEED_1000 &&
	164	priv->port_state.link_speed != SPEED_10000 &&
	165	priv->port_state.link_speed != SPEED_20000 &&
	166	priv->port_state.link_speed != SPEED_40000 &&
	167	priv->port_state.link_speed != SPEED_56000)
e7c1c2c4	168	return priv->port_state.link_speed;
dcf972a3	169
e7c1c2c4 YP	170	return 0;
	171	}
	172
	173
	174	void mlx4_en_ex_selftest(struct net_device dev, u32 flags, u64 *buf)
	175	{
	176	struct mlx4_en_priv *priv = netdev_priv(dev);
e7c1c2c4 YP	177	int i, carrier_ok;
	178
	179	memset(buf, 0, sizeof(u64) * MLX4_EN_NUM_SELF_TEST);
	180
	181	if (*flags & ETH_TEST_FL_OFFLINE) {
	182	/* disable the interface */
	183	carrier_ok = netif_carrier_ok(dev);
	184
	185	netif_carrier_off(dev);
25985edc	186	/* Wait until all tx queues are empty.
e7c1c2c4 YP	187	* there should not be any additional incoming traffic
	188	* since we turned the carrier off */
	189	msleep(200);
e7c1c2c4	190
ccf86321 OG	191	if (priv->mdev->dev->caps.flags &
ccf86321 OG	192	MLX4_DEV_CAP_FLAG_UC_LOOPBACK) {
e7c1c2c4	193	buf[3] = mlx4_en_test_registers(priv);
4359db1e EE	194	if (priv->port_up)
4359db1e EE	195	buf[4] = mlx4_en_test_loopback(priv);
e7c1c2c4 YP	196	}
	197
	198	if (carrier_ok)
	199	netif_carrier_on(dev);
	200
	201	}
6f2e0d2c	202	buf[0] = mlx4_en_test_interrupts(priv);
e7c1c2c4 YP	203	buf[1] = mlx4_en_test_link(priv);
	204	buf[2] = mlx4_en_test_speed(priv);
	205
	206	for (i = 0; i < MLX4_EN_NUM_SELF_TEST; i++) {
	207	if (buf[i])
	208	*flags \|= ETH_TEST_FL_FAILED;
	209	}
	210	}