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/ip.h>
34 #include <linux/udp.h>
35 #include <net/udp.h>
36 #include "en.h"
37 #include "en/port.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
mlx5e_self_test_num(struct mlx5e_priv * priv)58 int mlx5e_self_test_num(struct mlx5e_priv *priv)
59 {
60 return ARRAY_SIZE(mlx5e_self_tests);
61 }
62
mlx5e_test_health_info(struct mlx5e_priv * priv)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->fatal_error ? 1 : 0;
68 }
69
mlx5e_test_link_state(struct mlx5e_priv * priv)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_VPORT_STATE_OP_MOD_VNIC_VPORT, 0);
78 return port_state == VPORT_STATE_UP ? 0 : 1;
79 }
80
mlx5e_test_link_speed(struct mlx5e_priv * priv)81 static int mlx5e_test_link_speed(struct mlx5e_priv *priv)
82 {
83 u32 speed;
84
85 if (!netif_carrier_ok(priv->netdev))
86 return 1;
87
88 return mlx5e_port_linkspeed(priv->mdev, &speed);
89 }
90
91 struct mlx5ehdr {
92 __be32 version;
93 __be64 magic;
94 };
95
96 #ifdef CONFIG_INET
97 /* loopback test */
98 #define MLX5E_TEST_PKT_SIZE (sizeof(struct ethhdr) + sizeof(struct iphdr) +\
99 sizeof(struct udphdr) + sizeof(struct mlx5ehdr))
100 #define MLX5E_TEST_MAGIC 0x5AEED15C001ULL
101
mlx5e_test_get_udp_skb(struct mlx5e_priv * priv)102 static struct sk_buff *mlx5e_test_get_udp_skb(struct mlx5e_priv *priv)
103 {
104 struct sk_buff *skb = NULL;
105 struct mlx5ehdr *mlxh;
106 struct ethhdr *ethh;
107 struct udphdr *udph;
108 struct iphdr *iph;
109 int iplen;
110
111 skb = netdev_alloc_skb(priv->netdev, MLX5E_TEST_PKT_SIZE);
112 if (!skb) {
113 netdev_err(priv->netdev, "\tFailed to alloc loopback skb\n");
114 return NULL;
115 }
116
117 net_prefetchw(skb->data);
118 skb_reserve(skb, NET_IP_ALIGN);
119
120 /* Reserve for ethernet and IP header */
121 ethh = skb_push(skb, ETH_HLEN);
122 skb_reset_mac_header(skb);
123
124 skb_set_network_header(skb, skb->len);
125 iph = skb_put(skb, sizeof(struct iphdr));
126
127 skb_set_transport_header(skb, skb->len);
128 udph = skb_put(skb, sizeof(struct udphdr));
129
130 /* Fill ETH header */
131 ether_addr_copy(ethh->h_dest, priv->netdev->dev_addr);
132 eth_zero_addr(ethh->h_source);
133 ethh->h_proto = htons(ETH_P_IP);
134
135 /* Fill UDP header */
136 udph->source = htons(9);
137 udph->dest = htons(9); /* Discard Protocol */
138 udph->len = htons(sizeof(struct mlx5ehdr) + sizeof(struct udphdr));
139 udph->check = 0;
140
141 /* Fill IP header */
142 iph->ihl = 5;
143 iph->ttl = 32;
144 iph->version = 4;
145 iph->protocol = IPPROTO_UDP;
146 iplen = sizeof(struct iphdr) + sizeof(struct udphdr) +
147 sizeof(struct mlx5ehdr);
148 iph->tot_len = htons(iplen);
149 iph->frag_off = 0;
150 iph->saddr = 0;
151 iph->daddr = 0;
152 iph->tos = 0;
153 iph->id = 0;
154 ip_send_check(iph);
155
156 /* Fill test header and data */
157 mlxh = skb_put(skb, sizeof(*mlxh));
158 mlxh->version = 0;
159 mlxh->magic = cpu_to_be64(MLX5E_TEST_MAGIC);
160
161 skb->csum = 0;
162 skb->ip_summed = CHECKSUM_PARTIAL;
163 udp4_hwcsum(skb, iph->saddr, iph->daddr);
164
165 skb->protocol = htons(ETH_P_IP);
166 skb->pkt_type = PACKET_HOST;
167 skb->dev = priv->netdev;
168
169 return skb;
170 }
171
172 struct mlx5e_lbt_priv {
173 struct packet_type pt;
174 struct completion comp;
175 bool loopback_ok;
176 bool local_lb;
177 };
178
179 static int
mlx5e_test_loopback_validate(struct sk_buff * skb,struct net_device * ndev,struct packet_type * pt,struct net_device * orig_ndev)180 mlx5e_test_loopback_validate(struct sk_buff *skb,
181 struct net_device *ndev,
182 struct packet_type *pt,
183 struct net_device *orig_ndev)
184 {
185 struct mlx5e_lbt_priv *lbtp = pt->af_packet_priv;
186 struct mlx5ehdr *mlxh;
187 struct ethhdr *ethh;
188 struct udphdr *udph;
189 struct iphdr *iph;
190
191 /* We are only going to peek, no need to clone the SKB */
192 if (MLX5E_TEST_PKT_SIZE - ETH_HLEN > skb_headlen(skb))
193 goto out;
194
195 ethh = (struct ethhdr *)skb_mac_header(skb);
196 if (!ether_addr_equal(ethh->h_dest, orig_ndev->dev_addr))
197 goto out;
198
199 iph = ip_hdr(skb);
200 if (iph->protocol != IPPROTO_UDP)
201 goto out;
202
203 /* Don't assume skb_transport_header() was set */
204 udph = (struct udphdr *)((u8 *)iph + 4 * iph->ihl);
205 if (udph->dest != htons(9))
206 goto out;
207
208 mlxh = (struct mlx5ehdr *)((char *)udph + sizeof(*udph));
209 if (mlxh->magic != cpu_to_be64(MLX5E_TEST_MAGIC))
210 goto out; /* so close ! */
211
212 /* bingo */
213 lbtp->loopback_ok = true;
214 complete(&lbtp->comp);
215 out:
216 kfree_skb(skb);
217 return 0;
218 }
219
mlx5e_test_loopback_setup(struct mlx5e_priv * priv,struct mlx5e_lbt_priv * lbtp)220 static int mlx5e_test_loopback_setup(struct mlx5e_priv *priv,
221 struct mlx5e_lbt_priv *lbtp)
222 {
223 int err = 0;
224
225 /* Temporarily enable local_lb */
226 err = mlx5_nic_vport_query_local_lb(priv->mdev, &lbtp->local_lb);
227 if (err)
228 return err;
229
230 if (!lbtp->local_lb) {
231 err = mlx5_nic_vport_update_local_lb(priv->mdev, true);
232 if (err)
233 return err;
234 }
235
236 err = mlx5e_refresh_tirs(priv, true, false);
237 if (err)
238 goto out;
239
240 lbtp->loopback_ok = false;
241 init_completion(&lbtp->comp);
242
243 lbtp->pt.type = htons(ETH_P_IP);
244 lbtp->pt.func = mlx5e_test_loopback_validate;
245 lbtp->pt.dev = priv->netdev;
246 lbtp->pt.af_packet_priv = lbtp;
247 dev_add_pack(&lbtp->pt);
248
249 return 0;
250
251 out:
252 if (!lbtp->local_lb)
253 mlx5_nic_vport_update_local_lb(priv->mdev, false);
254
255 return err;
256 }
257
mlx5e_test_loopback_cleanup(struct mlx5e_priv * priv,struct mlx5e_lbt_priv * lbtp)258 static void mlx5e_test_loopback_cleanup(struct mlx5e_priv *priv,
259 struct mlx5e_lbt_priv *lbtp)
260 {
261 if (!lbtp->local_lb)
262 mlx5_nic_vport_update_local_lb(priv->mdev, false);
263
264 dev_remove_pack(&lbtp->pt);
265 mlx5e_refresh_tirs(priv, false, false);
266 }
267
268 #define MLX5E_LB_VERIFY_TIMEOUT (msecs_to_jiffies(200))
mlx5e_test_loopback(struct mlx5e_priv * priv)269 static int mlx5e_test_loopback(struct mlx5e_priv *priv)
270 {
271 struct mlx5e_lbt_priv *lbtp;
272 struct sk_buff *skb = NULL;
273 int err;
274
275 if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
276 netdev_err(priv->netdev,
277 "\tCan't perform loopback test while device is down\n");
278 return -ENODEV;
279 }
280
281 lbtp = kzalloc(sizeof(*lbtp), GFP_KERNEL);
282 if (!lbtp)
283 return -ENOMEM;
284 lbtp->loopback_ok = false;
285
286 err = mlx5e_test_loopback_setup(priv, lbtp);
287 if (err)
288 goto out;
289
290 skb = mlx5e_test_get_udp_skb(priv);
291 if (!skb) {
292 err = -ENOMEM;
293 goto cleanup;
294 }
295
296 skb_set_queue_mapping(skb, 0);
297 err = dev_queue_xmit(skb);
298 if (err) {
299 netdev_err(priv->netdev,
300 "\tFailed to xmit loopback packet err(%d)\n",
301 err);
302 goto cleanup;
303 }
304
305 wait_for_completion_timeout(&lbtp->comp, MLX5E_LB_VERIFY_TIMEOUT);
306 err = !lbtp->loopback_ok;
307
308 cleanup:
309 mlx5e_test_loopback_cleanup(priv, lbtp);
310 out:
311 kfree(lbtp);
312 return err;
313 }
314 #endif
315
316 static int (*mlx5e_st_func[MLX5E_ST_NUM])(struct mlx5e_priv *) = {
317 mlx5e_test_link_state,
318 mlx5e_test_link_speed,
319 mlx5e_test_health_info,
320 #ifdef CONFIG_INET
321 mlx5e_test_loopback,
322 #endif
323 };
324
mlx5e_self_test(struct net_device * ndev,struct ethtool_test * etest,u64 * buf)325 void mlx5e_self_test(struct net_device *ndev, struct ethtool_test *etest,
326 u64 *buf)
327 {
328 struct mlx5e_priv *priv = netdev_priv(ndev);
329 int i;
330
331 memset(buf, 0, sizeof(u64) * MLX5E_ST_NUM);
332
333 mutex_lock(&priv->state_lock);
334 netdev_info(ndev, "Self test begin..\n");
335
336 for (i = 0; i < MLX5E_ST_NUM; i++) {
337 netdev_info(ndev, "\t[%d] %s start..\n",
338 i, mlx5e_self_tests[i]);
339 buf[i] = mlx5e_st_func[i](priv);
340 netdev_info(ndev, "\t[%d] %s end: result(%lld)\n",
341 i, mlx5e_self_tests[i], buf[i]);
342 }
343
344 mutex_unlock(&priv->state_lock);
345
346 for (i = 0; i < MLX5E_ST_NUM; i++) {
347 if (buf[i]) {
348 etest->flags |= ETH_TEST_FL_FAILED;
349 break;
350 }
351 }
352 netdev_info(ndev, "Self test out: status flags(0x%x)\n",
353 etest->flags);
354 }
355
