drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c

   1 /*
   2  * Copyright (c) 2016, Mellanox Technologies, Ltd.  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 #include <linux/prefetch.h>
  34 #include <linux/ip.h>
  35 #include <linux/udp.h>
  36 #include <net/udp.h>
  37 #include "en.h"
  38
  39 enum {
  40         MLX5E_ST_LINK_STATE,
  41         MLX5E_ST_LINK_SPEED,
  42         MLX5E_ST_HEALTH_INFO,
  43 #ifdef CONFIG_INET
  44         MLX5E_ST_LOOPBACK,
  45 #endif
  46         MLX5E_ST_NUM,
  47 };
  48
  49 const char mlx5e_self_tests[MLX5E_ST_NUM][ETH_GSTRING_LEN] = {
  50         "Link Test",
  51         "Speed Test",
  52         "Health Test",
  53 #ifdef CONFIG_INET
  54         "Loopback Test",
  55 #endif
  56 };
  57
  58 int mlx5e_self_test_num(struct mlx5e_priv *priv)
  59 {
  60         return ARRAY_SIZE(mlx5e_self_tests);
  61 }
  62
  63 static int mlx5e_test_health_info(struct mlx5e_priv *priv)
  64 {
  65         struct mlx5_core_health *health = &priv->mdev->priv.health;
  66
  67         return health->sick ? 1 : 0;
  68 }
  69
  70 static int mlx5e_test_link_state(struct mlx5e_priv *priv)
  71 {
  72         u8 port_state;
  73
  74         if (!netif_carrier_ok(priv->netdev))
  75                 return 1;
  76
  77         port_state = mlx5_query_vport_state(priv->mdev, MLX5_QUERY_VPORT_STATE_IN_OP_MOD_VNIC_VPORT, 0);
  78         return port_state == VPORT_STATE_UP ? 0 : 1;
  79 }
  80
  81 static int mlx5e_test_link_speed(struct mlx5e_priv *priv)
  82 {
  83         u32 out[MLX5_ST_SZ_DW(ptys_reg)];
  84         u32 eth_proto_oper;
  85         int i;
  86
  87         if (!netif_carrier_ok(priv->netdev))
  88                 return 1;
  89
  90         if (mlx5_query_port_ptys(priv->mdev, out, sizeof(out), MLX5_PTYS_EN, 1))
  91                 return 1;
  92
  93         eth_proto_oper = MLX5_GET(ptys_reg, out, eth_proto_oper);
  94         for (i = 0; i < MLX5E_LINK_MODES_NUMBER; i++) {
  95                 if (eth_proto_oper & MLX5E_PROT_MASK(i))
  96                         return 0;
  97         }
  98         return 1;
  99 }
 100
 101 #ifdef CONFIG_INET
 102 /* loopback test */
 103 #define MLX5E_TEST_PKT_SIZE (MLX5_MPWRQ_SMALL_PACKET_THRESHOLD - NET_IP_ALIGN)
 104 static const char mlx5e_test_text[ETH_GSTRING_LEN] = "MLX5E SELF TEST";
 105 #define MLX5E_TEST_MAGIC 0x5AEED15C001ULL
 106
 107 struct mlx5ehdr {
 108         __be32 version;
 109         __be64 magic;
 110         char   text[ETH_GSTRING_LEN];
 111 };
 112
 113 static struct sk_buff *mlx5e_test_get_udp_skb(struct mlx5e_priv *priv)
 114 {
 115         struct sk_buff *skb = NULL;
 116         struct mlx5ehdr *mlxh;
 117         struct ethhdr *ethh;
 118         struct udphdr *udph;
 119         struct iphdr *iph;
 120         int datalen, iplen;
 121
 122         datalen = MLX5E_TEST_PKT_SIZE -
 123                   (sizeof(*ethh) + sizeof(*iph) + sizeof(*udph));
 124
 125         skb = netdev_alloc_skb(priv->netdev, MLX5E_TEST_PKT_SIZE);
 126         if (!skb) {
 127                 netdev_err(priv->netdev, "\tFailed to alloc loopback skb\n");
 128                 return NULL;
 129         }
 130
 131         prefetchw(skb->data);
 132         skb_reserve(skb, NET_IP_ALIGN);
 133
 134         /*  Reserve for ethernet and IP header  */
 135         ethh = skb_push(skb, ETH_HLEN);
 136         skb_reset_mac_header(skb);
 137
 138         skb_set_network_header(skb, skb->len);
 139         iph = skb_put(skb, sizeof(struct iphdr));
 140
 141         skb_set_transport_header(skb, skb->len);
 142         udph = skb_put(skb, sizeof(struct udphdr));
 143
 144         /* Fill ETH header */
 145         ether_addr_copy(ethh->h_dest, priv->netdev->dev_addr);
 146         eth_zero_addr(ethh->h_source);
 147         ethh->h_proto = htons(ETH_P_IP);
 148
 149         /* Fill UDP header */
 150         udph->source = htons(9);
 151         udph->dest = htons(9); /* Discard Protocol */
 152         udph->len = htons(datalen + sizeof(struct udphdr));
 153         udph->check = 0;
 154
 155         /* Fill IP header */
 156         iph->ihl = 5;
 157         iph->ttl = 32;
 158         iph->version = 4;
 159         iph->protocol = IPPROTO_UDP;
 160         iplen = sizeof(struct iphdr) + sizeof(struct udphdr) + datalen;
 161         iph->tot_len = htons(iplen);
 162         iph->frag_off = 0;
 163         iph->saddr = 0;
 164         iph->daddr = 0;
 165         iph->tos = 0;
 166         iph->id = 0;
 167         ip_send_check(iph);
 168
 169         /* Fill test header and data */
 170         mlxh = skb_put(skb, sizeof(*mlxh));
 171         mlxh->version = 0;
 172         mlxh->magic = cpu_to_be64(MLX5E_TEST_MAGIC);
 173         strlcpy(mlxh->text, mlx5e_test_text, sizeof(mlxh->text));
 174         datalen -= sizeof(*mlxh);
 175         skb_put_zero(skb, datalen);
 176
 177         skb->csum = 0;
 178         skb->ip_summed = CHECKSUM_PARTIAL;
 179         udp4_hwcsum(skb, iph->saddr, iph->daddr);
 180
 181         skb->protocol = htons(ETH_P_IP);
 182         skb->pkt_type = PACKET_HOST;
 183         skb->dev = priv->netdev;
 184
 185         return skb;
 186 }
 187
 188 struct mlx5e_lbt_priv {
 189         struct packet_type pt;
 190         struct completion comp;
 191         bool loopback_ok;
 192         bool local_lb;
 193 };
 194
 195 static int
 196 mlx5e_test_loopback_validate(struct sk_buff *skb,
 197                              struct net_device *ndev,
 198                              struct packet_type *pt,
 199                              struct net_device *orig_ndev)
 200 {
 201         struct mlx5e_lbt_priv *lbtp = pt->af_packet_priv;
 202         struct mlx5ehdr *mlxh;
 203         struct ethhdr *ethh;
 204         struct udphdr *udph;
 205         struct iphdr *iph;
 206
 207         /* We are only going to peek, no need to clone the SKB */
 208         if (MLX5E_TEST_PKT_SIZE - ETH_HLEN > skb_headlen(skb))
 209                 goto out;
 210
 211         ethh = (struct ethhdr *)skb_mac_header(skb);
 212         if (!ether_addr_equal(ethh->h_dest, orig_ndev->dev_addr))
 213                 goto out;
 214
 215         iph = ip_hdr(skb);
 216         if (iph->protocol != IPPROTO_UDP)
 217                 goto out;
 218
 219         udph = udp_hdr(skb);
 220         if (udph->dest != htons(9))
 221                 goto out;
 222
 223         mlxh = (struct mlx5ehdr *)((char *)udph + sizeof(*udph));
 224         if (mlxh->magic != cpu_to_be64(MLX5E_TEST_MAGIC))
 225                 goto out; /* so close ! */
 226
 227         /* bingo */
 228         lbtp->loopback_ok = true;
 229         complete(&lbtp->comp);
 230 out:
 231         kfree_skb(skb);
 232         return 0;
 233 }
 234
 235 static int mlx5e_test_loopback_setup(struct mlx5e_priv *priv,
 236                                      struct mlx5e_lbt_priv *lbtp)
 237 {
 238         int err = 0;
 239
 240         /* Temporarily enable local_lb */
 241         if (MLX5_CAP_GEN(priv->mdev, disable_local_lb)) {
 242                 mlx5_nic_vport_query_local_lb(priv->mdev, &lbtp->local_lb);
 243                 if (!lbtp->local_lb)
 244                         mlx5_nic_vport_update_local_lb(priv->mdev, true);
 245         }
 246
 247         err = mlx5e_refresh_tirs(priv, true);
 248         if (err)
 249                 return err;
 250
 251         lbtp->loopback_ok = false;
 252         init_completion(&lbtp->comp);
 253
 254         lbtp->pt.type = htons(ETH_P_IP);
 255         lbtp->pt.func = mlx5e_test_loopback_validate;
 256         lbtp->pt.dev = priv->netdev;
 257         lbtp->pt.af_packet_priv = lbtp;
 258         dev_add_pack(&lbtp->pt);
 259         return err;
 260 }
 261
 262 static void mlx5e_test_loopback_cleanup(struct mlx5e_priv *priv,
 263                                         struct mlx5e_lbt_priv *lbtp)
 264 {
 265         if (MLX5_CAP_GEN(priv->mdev, disable_local_lb)) {
 266                 if (!lbtp->local_lb)
 267                         mlx5_nic_vport_update_local_lb(priv->mdev, false);
 268         }
 269
 270         dev_remove_pack(&lbtp->pt);
 271         mlx5e_refresh_tirs(priv, false);
 272 }
 273
 274 #define MLX5E_LB_VERIFY_TIMEOUT (msecs_to_jiffies(200))
 275 static int mlx5e_test_loopback(struct mlx5e_priv *priv)
 276 {
 277         struct mlx5e_lbt_priv *lbtp;
 278         struct sk_buff *skb = NULL;
 279         int err;
 280
 281         if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
 282                 netdev_err(priv->netdev,
 283                            "\tCan't perform loobpack test while device is down\n");
 284                 return -ENODEV;
 285         }
 286
 287         lbtp = kzalloc(sizeof(*lbtp), GFP_KERNEL);
 288         if (!lbtp)
 289                 return -ENOMEM;
 290         lbtp->loopback_ok = false;
 291
 292         err = mlx5e_test_loopback_setup(priv, lbtp);
 293         if (err)
 294                 goto out;
 295
 296         skb = mlx5e_test_get_udp_skb(priv);
 297         if (!skb) {
 298                 err = -ENOMEM;
 299                 goto cleanup;
 300         }
 301
 302         skb_set_queue_mapping(skb, 0);
 303         err = dev_queue_xmit(skb);
 304         if (err) {
 305                 netdev_err(priv->netdev,
 306                            "\tFailed to xmit loopback packet err(%d)\n",
 307                            err);
 308                 goto cleanup;
 309         }
 310
 311         wait_for_completion_timeout(&lbtp->comp, MLX5E_LB_VERIFY_TIMEOUT);
 312         err = !lbtp->loopback_ok;
 313
 314 cleanup:
 315         mlx5e_test_loopback_cleanup(priv, lbtp);
 316 out:
 317         kfree(lbtp);
 318         return err;
 319 }
 320 #endif
 321
 322 static int (*mlx5e_st_func[MLX5E_ST_NUM])(struct mlx5e_priv *) = {
 323         mlx5e_test_link_state,
 324         mlx5e_test_link_speed,
 325         mlx5e_test_health_info,
 326 #ifdef CONFIG_INET
 327         mlx5e_test_loopback,
 328 #endif
 329 };
 330
 331 void mlx5e_self_test(struct net_device *ndev, struct ethtool_test *etest,
 332                      u64 *buf)
 333 {
 334         struct mlx5e_priv *priv = netdev_priv(ndev);
 335         int i;
 336
 337         memset(buf, 0, sizeof(u64) * MLX5E_ST_NUM);
 338
 339         mutex_lock(&priv->state_lock);
 340         netdev_info(ndev, "Self test begin..\n");
 341
 342         for (i = 0; i < MLX5E_ST_NUM; i++) {
 343                 netdev_info(ndev, "\t[%d] %s start..\n",
 344                             i, mlx5e_self_tests[i]);
 345                 buf[i] = mlx5e_st_func[i](priv);
 346                 netdev_info(ndev, "\t[%d] %s end: result(%lld)\n",
 347                             i, mlx5e_self_tests[i], buf[i]);
 348         }
 349
 350         mutex_unlock(&priv->state_lock);
 351
 352         for (i = 0; i < MLX5E_ST_NUM; i++) {
 353                 if (buf[i]) {
 354                         etest->flags |= ETH_TEST_FL_FAILED;
 355                         break;
 356                 }
 357         }
 358         netdev_info(ndev, "Self test out: status flags(0x%x)\n",
 359                     etest->flags);
 360 }