?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
kmemtrace: SLOB hooks.
[linux-2.6/kmemtrace.git] / drivers / net / sfc / selftest.c
blob3b2de9fe7f27ee6607a3cdc17cf8a443285287c5
1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2008 Solarflare Communications Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
9 */
10
11 #include <linux/netdevice.h>
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/kernel_stat.h>
15 #include <linux/pci.h>
16 #include <linux/ethtool.h>
17 #include <linux/ip.h>
18 #include <linux/in.h>
19 #include <linux/udp.h>
20 #include <linux/rtnetlink.h>
21 #include <asm/io.h>
22 #include "net_driver.h"
23 #include "ethtool.h"
24 #include "efx.h"
25 #include "falcon.h"
26 #include "selftest.h"
27 #include "boards.h"
28 #include "workarounds.h"
29 #include "mac.h"
30
31 /*
32 * Loopback test packet structure
33 *
34 * The self-test should stress every RSS vector, and unfortunately
35 * Falcon only performs RSS on TCP/UDP packets.
36 */
37 struct efx_loopback_payload {
38 struct ethhdr header;
39 struct iphdr ip;
40 struct udphdr udp;
41 __be16 iteration;
42 const char msg[64];
43 } __attribute__ ((packed));
44
45 /* Loopback test source MAC address */
46 static const unsigned char payload_source[ETH_ALEN] = {
47 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b,
48 };
49
50 static const char *payload_msg =
51 "Hello world! This is an Efx loopback test in progress!";
52
53 /**
54 * efx_selftest_state - persistent state during a selftest
55 * @flush: Drop all packets in efx_loopback_rx_packet
56 * @packet_count: Number of packets being used in this test
57 * @skbs: An array of skbs transmitted
58 * @rx_good: RX good packet count
59 * @rx_bad: RX bad packet count
60 * @payload: Payload used in tests
61 */
62 struct efx_selftest_state {
63 int flush;
64 int packet_count;
65 struct sk_buff **skbs;
66 atomic_t rx_good;
67 atomic_t rx_bad;
68 struct efx_loopback_payload payload;
69 };
70
71 /**************************************************************************
72 *
73 * Configurable values
74 *
75 **************************************************************************/
76
77 /* Level of loopback testing
78 *
79 * The maximum packet burst length is 16**(n-1), i.e.
80 *
81 * - Level 0 : no packets
82 * - Level 1 : 1 packet
83 * - Level 2 : 17 packets (1 * 1 packet, 1 * 16 packets)
84 * - Level 3 : 273 packets (1 * 1 packet, 1 * 16 packet, 1 * 256 packets)
85 *
86 */
87 static unsigned int loopback_test_level = 3;
88
89 /**************************************************************************
90 *
91 * Interrupt and event queue testing
92 *
93 **************************************************************************/
94
95 /* Test generation and receipt of interrupts */
96 static int efx_test_interrupts(struct efx_nic *efx,
97 struct efx_self_tests *tests)
98 {
99 struct efx_channel *channel;
100
101 EFX_LOG(efx, "testing interrupts\n");
102 tests->interrupt = -1;
103
104 /* Reset interrupt flag */
105 efx->last_irq_cpu = -1;
106 smp_wmb();
107
108 /* ACK each interrupting event queue. Receiving an interrupt due to
109 * traffic before a test event is raised is considered a pass */
110 efx_for_each_channel_with_interrupt(channel, efx) {
111 if (channel->work_pending)
112 efx_process_channel_now(channel);
113 if (efx->last_irq_cpu >= 0)
114 goto success;
115 }
116
117 falcon_generate_interrupt(efx);
118
119 /* Wait for arrival of test interrupt. */
120 EFX_LOG(efx, "waiting for test interrupt\n");
121 schedule_timeout_uninterruptible(HZ / 10);
122 if (efx->last_irq_cpu >= 0)
123 goto success;
124
125 EFX_ERR(efx, "timed out waiting for interrupt\n");
126 return -ETIMEDOUT;
127
128 success:
129 EFX_LOG(efx, "test interrupt (mode %d) seen on CPU%d\n",
130 efx->interrupt_mode, efx->last_irq_cpu);
131 tests->interrupt = 1;
132 return 0;
133 }
134
135 /* Test generation and receipt of non-interrupting events */
136 static int efx_test_eventq(struct efx_channel *channel,
137 struct efx_self_tests *tests)
138 {
139 unsigned int magic;
140
141 /* Channel specific code, limited to 20 bits */
142 magic = (0x00010150 + channel->channel);
143 EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n",
144 channel->channel, magic);
145
146 tests->eventq_dma[channel->channel] = -1;
147 tests->eventq_int[channel->channel] = 1; /* fake pass */
148 tests->eventq_poll[channel->channel] = 1; /* fake pass */
149
150 /* Reset flag and zero magic word */
151 channel->efx->last_irq_cpu = -1;
152 channel->eventq_magic = 0;
153 smp_wmb();
154
155 falcon_generate_test_event(channel, magic);
156 udelay(1);
157
158 efx_process_channel_now(channel);
159 if (channel->eventq_magic != magic) {
160 EFX_ERR(channel->efx, "channel %d failed to see test event\n",
161 channel->channel);
162 return -ETIMEDOUT;
163 } else {
164 tests->eventq_dma[channel->channel] = 1;
165 }
166
167 return 0;
168 }
169
170 /* Test generation and receipt of interrupting events */
171 static int efx_test_eventq_irq(struct efx_channel *channel,
172 struct efx_self_tests *tests)
173 {
174 unsigned int magic, count;
175
176 /* Channel specific code, limited to 20 bits */
177 magic = (0x00010150 + channel->channel);
178 EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n",
179 channel->channel, magic);
180
181 tests->eventq_dma[channel->channel] = -1;
182 tests->eventq_int[channel->channel] = -1;
183 tests->eventq_poll[channel->channel] = -1;
184
185 /* Reset flag and zero magic word */
186 channel->efx->last_irq_cpu = -1;
187 channel->eventq_magic = 0;
188 smp_wmb();
189
190 falcon_generate_test_event(channel, magic);
191
192 /* Wait for arrival of interrupt */
193 count = 0;
194 do {
195 schedule_timeout_uninterruptible(HZ / 100);
196
197 if (channel->work_pending)
198 efx_process_channel_now(channel);
199
200 if (channel->eventq_magic == magic)
201 goto eventq_ok;
202 } while (++count < 2);
203
204 EFX_ERR(channel->efx, "channel %d timed out waiting for event queue\n",
205 channel->channel);
206
207 /* See if interrupt arrived */
208 if (channel->efx->last_irq_cpu >= 0) {
209 EFX_ERR(channel->efx, "channel %d saw interrupt on CPU%d "
210 "during event queue test\n", channel->channel,
211 raw_smp_processor_id());
212 tests->eventq_int[channel->channel] = 1;
213 }
214
215 /* Check to see if event was received even if interrupt wasn't */
216 efx_process_channel_now(channel);
217 if (channel->eventq_magic == magic) {
218 EFX_ERR(channel->efx, "channel %d event was generated, but "
219 "failed to trigger an interrupt\n", channel->channel);
220 tests->eventq_dma[channel->channel] = 1;
221 }
222
223 return -ETIMEDOUT;
224 eventq_ok:
225 EFX_LOG(channel->efx, "channel %d event queue passed\n",
226 channel->channel);
227 tests->eventq_dma[channel->channel] = 1;
228 tests->eventq_int[channel->channel] = 1;
229 tests->eventq_poll[channel->channel] = 1;
230 return 0;
231 }
232
233 /**************************************************************************
234 *
235 * PHY testing
236 *
237 **************************************************************************/
238
239 /* Check PHY presence by reading the PHY ID registers */
240 static int efx_test_phy(struct efx_nic *efx,
241 struct efx_self_tests *tests)
242 {
243 u16 physid1, physid2;
244 struct mii_if_info *mii = &efx->mii;
245 struct net_device *net_dev = efx->net_dev;
246
247 if (efx->phy_type == PHY_TYPE_NONE)
248 return 0;
249
250 EFX_LOG(efx, "testing PHY presence\n");
251 tests->phy_ok = -1;
252
253 physid1 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID1);
254 physid2 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID2);
255
256 if ((physid1 != 0x0000) && (physid1 != 0xffff) &&
257 (physid2 != 0x0000) && (physid2 != 0xffff)) {
258 EFX_LOG(efx, "found MII PHY %d ID 0x%x:%x\n",
259 mii->phy_id, physid1, physid2);
260 tests->phy_ok = 1;
261 return 0;
262 }
263
264 EFX_ERR(efx, "no MII PHY present with ID %d\n", mii->phy_id);
265 return -ENODEV;
266 }
267
268 /**************************************************************************
269 *
270 * Loopback testing
271 * NB Only one loopback test can be executing concurrently.
272 *
273 **************************************************************************/
274
275 /* Loopback test RX callback
276 * This is called for each received packet during loopback testing.
277 */
278 void efx_loopback_rx_packet(struct efx_nic *efx,
279 const char *buf_ptr, int pkt_len)
280 {
281 struct efx_selftest_state *state = efx->loopback_selftest;
282 struct efx_loopback_payload *received;
283 struct efx_loopback_payload *payload;
284
285 BUG_ON(!buf_ptr);
286
287 /* If we are just flushing, then drop the packet */
288 if ((state == NULL) || state->flush)
289 return;
290
291 payload = &state->payload;
292
293 received = (struct efx_loopback_payload *) buf_ptr;
294 received->ip.saddr = payload->ip.saddr;
295 received->ip.check = payload->ip.check;
296
297 /* Check that header exists */
298 if (pkt_len < sizeof(received->header)) {
299 EFX_ERR(efx, "saw runt RX packet (length %d) in %s loopback "
300 "test\n", pkt_len, LOOPBACK_MODE(efx));
301 goto err;
302 }
303
304 /* Check that the ethernet header exists */
305 if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) {
306 EFX_ERR(efx, "saw non-loopback RX packet in %s loopback test\n",
307 LOOPBACK_MODE(efx));
308 goto err;
309 }
310
311 /* Check packet length */
312 if (pkt_len != sizeof(*payload)) {
313 EFX_ERR(efx, "saw incorrect RX packet length %d (wanted %d) in "
314 "%s loopback test\n", pkt_len, (int)sizeof(*payload),
315 LOOPBACK_MODE(efx));
316 goto err;
317 }
318
319 /* Check that IP header matches */
320 if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) {
321 EFX_ERR(efx, "saw corrupted IP header in %s loopback test\n",
322 LOOPBACK_MODE(efx));
323 goto err;
324 }
325
326 /* Check that msg and padding matches */
327 if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) {
328 EFX_ERR(efx, "saw corrupted RX packet in %s loopback test\n",
329 LOOPBACK_MODE(efx));
330 goto err;
331 }
332
333 /* Check that iteration matches */
334 if (received->iteration != payload->iteration) {
335 EFX_ERR(efx, "saw RX packet from iteration %d (wanted %d) in "
336 "%s loopback test\n", ntohs(received->iteration),
337 ntohs(payload->iteration), LOOPBACK_MODE(efx));
338 goto err;
339 }
340
341 /* Increase correct RX count */
342 EFX_TRACE(efx, "got loopback RX in %s loopback test\n",
343 LOOPBACK_MODE(efx));
344
345 atomic_inc(&state->rx_good);
346 return;
347
348 err:
349 #ifdef EFX_ENABLE_DEBUG
350 if (atomic_read(&state->rx_bad) == 0) {
351 EFX_ERR(efx, "received packet:\n");
352 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
353 buf_ptr, pkt_len, 0);
354 EFX_ERR(efx, "expected packet:\n");
355 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
356 &state->payload, sizeof(state->payload), 0);
357 }
358 #endif
359 atomic_inc(&state->rx_bad);
360 }
361
362 /* Initialise an efx_selftest_state for a new iteration */
363 static void efx_iterate_state(struct efx_nic *efx)
364 {
365 struct efx_selftest_state *state = efx->loopback_selftest;
366 struct net_device *net_dev = efx->net_dev;
367 struct efx_loopback_payload *payload = &state->payload;
368
369 /* Initialise the layerII header */
370 memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN);
371 memcpy(&payload->header.h_source, &payload_source, ETH_ALEN);
372 payload->header.h_proto = htons(ETH_P_IP);
373
374 /* saddr set later and used as incrementing count */
375 payload->ip.daddr = htonl(INADDR_LOOPBACK);
376 payload->ip.ihl = 5;
377 payload->ip.check = htons(0xdead);
378 payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr));
379 payload->ip.version = IPVERSION;
380 payload->ip.protocol = IPPROTO_UDP;
381
382 /* Initialise udp header */
383 payload->udp.source = 0;
384 payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) -
385 sizeof(struct iphdr));
386 payload->udp.check = 0; /* checksum ignored */
387
388 /* Fill out payload */
389 payload->iteration = htons(ntohs(payload->iteration) + 1);
390 memcpy(&payload->msg, payload_msg, sizeof(payload_msg));
391
392 /* Fill out remaining state members */
393 atomic_set(&state->rx_good, 0);
394 atomic_set(&state->rx_bad, 0);
395 smp_wmb();
396 }
397
398 static int efx_tx_loopback(struct efx_tx_queue *tx_queue)
399 {
400 struct efx_nic *efx = tx_queue->efx;
401 struct efx_selftest_state *state = efx->loopback_selftest;
402 struct efx_loopback_payload *payload;
403 struct sk_buff *skb;
404 int i, rc;
405
406 /* Transmit N copies of buffer */
407 for (i = 0; i < state->packet_count; i++) {
408 /* Allocate an skb, holding an extra reference for
409 * transmit completion counting */
410 skb = alloc_skb(sizeof(state->payload), GFP_KERNEL);
411 if (!skb)
412 return -ENOMEM;
413 state->skbs[i] = skb;
414 skb_get(skb);
415
416 /* Copy the payload in, incrementing the source address to
417 * exercise the rss vectors */
418 payload = ((struct efx_loopback_payload *)
419 skb_put(skb, sizeof(state->payload)));
420 memcpy(payload, &state->payload, sizeof(state->payload));
421 payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2));
422
423 /* Ensure everything we've written is visible to the
424 * interrupt handler. */
425 smp_wmb();
426
427 if (efx_dev_registered(efx))
428 netif_tx_lock_bh(efx->net_dev);
429 rc = efx_xmit(efx, tx_queue, skb);
430 if (efx_dev_registered(efx))
431 netif_tx_unlock_bh(efx->net_dev);
432
433 if (rc != NETDEV_TX_OK) {
434 EFX_ERR(efx, "TX queue %d could not transmit packet %d "
435 "of %d in %s loopback test\n", tx_queue->queue,
436 i + 1, state->packet_count, LOOPBACK_MODE(efx));
437
438 /* Defer cleaning up the other skbs for the caller */
439 kfree_skb(skb);
440 return -EPIPE;
441 }
442 }
443
444 return 0;
445 }
446
447 static int efx_rx_loopback(struct efx_tx_queue *tx_queue,
448 struct efx_loopback_self_tests *lb_tests)
449 {
450 struct efx_nic *efx = tx_queue->efx;
451 struct efx_selftest_state *state = efx->loopback_selftest;
452 struct sk_buff *skb;
453 int tx_done = 0, rx_good, rx_bad;
454 int i, rc = 0;
455
456 if (efx_dev_registered(efx))
457 netif_tx_lock_bh(efx->net_dev);
458
459 /* Count the number of tx completions, and decrement the refcnt. Any
460 * skbs not already completed will be free'd when the queue is flushed */
461 for (i=0; i < state->packet_count; i++) {
462 skb = state->skbs[i];
463 if (skb && !skb_shared(skb))
464 ++tx_done;
465 dev_kfree_skb_any(skb);
466 }
467
468 if (efx_dev_registered(efx))
469 netif_tx_unlock_bh(efx->net_dev);
470
471 /* Check TX completion and received packet counts */
472 rx_good = atomic_read(&state->rx_good);
473 rx_bad = atomic_read(&state->rx_bad);
474 if (tx_done != state->packet_count) {
475 /* Don't free the skbs; they will be picked up on TX
476 * overflow or channel teardown.
477 */
478 EFX_ERR(efx, "TX queue %d saw only %d out of an expected %d "
479 "TX completion events in %s loopback test\n",
480 tx_queue->queue, tx_done, state->packet_count,
481 LOOPBACK_MODE(efx));
482 rc = -ETIMEDOUT;
483 /* Allow to fall through so we see the RX errors as well */
484 }
485
486 /* We may always be up to a flush away from our desired packet total */
487 if (rx_good != state->packet_count) {
488 EFX_LOG(efx, "TX queue %d saw only %d out of an expected %d "
489 "received packets in %s loopback test\n",
490 tx_queue->queue, rx_good, state->packet_count,
491 LOOPBACK_MODE(efx));
492 rc = -ETIMEDOUT;
493 /* Fall through */
494 }
495
496 /* Update loopback test structure */
497 lb_tests->tx_sent[tx_queue->queue] += state->packet_count;
498 lb_tests->tx_done[tx_queue->queue] += tx_done;
499 lb_tests->rx_good += rx_good;
500 lb_tests->rx_bad += rx_bad;
501
502 return rc;
503 }
504
505 static int
506 efx_test_loopback(struct efx_tx_queue *tx_queue,
507 struct efx_loopback_self_tests *lb_tests)
508 {
509 struct efx_nic *efx = tx_queue->efx;
510 struct efx_selftest_state *state = efx->loopback_selftest;
511 struct efx_channel *channel;
512 int i, rc = 0;
513
514 for (i = 0; i < loopback_test_level; i++) {
515 /* Determine how many packets to send */
516 state->packet_count = (efx->type->txd_ring_mask + 1) / 3;
517 state->packet_count = min(1 << (i << 2), state->packet_count);
518 state->skbs = kzalloc(sizeof(state->skbs[0]) *
519 state->packet_count, GFP_KERNEL);
520 if (!state->skbs)
521 return -ENOMEM;
522 state->flush = 0;
523
524 EFX_LOG(efx, "TX queue %d testing %s loopback with %d "
525 "packets\n", tx_queue->queue, LOOPBACK_MODE(efx),
526 state->packet_count);
527
528 efx_iterate_state(efx);
529 rc = efx_tx_loopback(tx_queue);
530
531 /* NAPI polling is not enabled, so process channels synchronously */
532 schedule_timeout_uninterruptible(HZ / 50);
533 efx_for_each_channel_with_interrupt(channel, efx) {
534 if (channel->work_pending)
535 efx_process_channel_now(channel);
536 }
537
538 rc |= efx_rx_loopback(tx_queue, lb_tests);
539 kfree(state->skbs);
540
541 if (rc) {
542 /* Wait a while to ensure there are no packets
543 * floating around after a failure. */
544 schedule_timeout_uninterruptible(HZ / 10);
545 return rc;
546 }
547 }
548
549 EFX_LOG(efx, "TX queue %d passed %s loopback test with a burst length "
550 "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx),
551 state->packet_count);
552
553 return rc;
554 }
555
556 static int efx_test_loopbacks(struct efx_nic *efx,
557 struct efx_self_tests *tests,
558 unsigned int loopback_modes)
559 {
560 struct efx_selftest_state *state = efx->loopback_selftest;
561 struct ethtool_cmd ecmd, ecmd_loopback;
562 struct efx_tx_queue *tx_queue;
563 enum efx_loopback_mode old_mode, mode;
564 int count, rc = 0, link_up;
565
566 rc = efx_ethtool_get_settings(efx->net_dev, &ecmd);
567 if (rc) {
568 EFX_ERR(efx, "could not get GMII settings\n");
569 return rc;
570 }
571 old_mode = efx->loopback_mode;
572
573 /* Disable autonegotiation for the purposes of loopback */
574 memcpy(&ecmd_loopback, &ecmd, sizeof(ecmd_loopback));
575 if (ecmd_loopback.autoneg == AUTONEG_ENABLE) {
576 ecmd_loopback.autoneg = AUTONEG_DISABLE;
577 ecmd_loopback.duplex = DUPLEX_FULL;
578 ecmd_loopback.speed = SPEED_10000;
579 }
580
581 rc = efx_ethtool_set_settings(efx->net_dev, &ecmd_loopback);
582 if (rc) {
583 EFX_ERR(efx, "could not disable autonegotiation\n");
584 goto out;
585 }
586 tests->loopback_speed = ecmd_loopback.speed;
587 tests->loopback_full_duplex = ecmd_loopback.duplex;
588
589 /* Test all supported loopback modes */
590 for (mode = LOOPBACK_NONE; mode < LOOPBACK_TEST_MAX; mode++) {
591 if (!(loopback_modes & (1 << mode)))
592 continue;
593
594 /* Move the port into the specified loopback mode. */
595 state->flush = 1;
596 efx->loopback_mode = mode;
597 efx_reconfigure_port(efx);
598
599 /* Wait for the PHY to signal the link is up */
600 count = 0;
601 do {
602 struct efx_channel *channel = &efx->channel[0];
603
604 falcon_check_xmac(efx);
605 schedule_timeout_uninterruptible(HZ / 10);
606 if (channel->work_pending)
607 efx_process_channel_now(channel);
608 /* Wait for PHY events to be processed */
609 flush_workqueue(efx->workqueue);
610 rmb();
611
612 /* efx->link_up can be 1 even if the XAUI link is down,
613 * (bug5762). Usually, it's not worth bothering with the
614 * difference, but for selftests, we need that extra
615 * guarantee that the link is really, really, up.
616 */
617 link_up = efx->link_up;
618 if (!falcon_xaui_link_ok(efx))
619 link_up = 0;
620
621 } while ((++count < 20) && !link_up);
622
623 /* The link should now be up. If it isn't, there is no point
624 * in attempting a loopback test */
625 if (!link_up) {
626 EFX_ERR(efx, "loopback %s never came up\n",
627 LOOPBACK_MODE(efx));
628 rc = -EIO;
629 goto out;
630 }
631
632 EFX_LOG(efx, "link came up in %s loopback in %d iterations\n",
633 LOOPBACK_MODE(efx), count);
634
635 /* Test every TX queue */
636 efx_for_each_tx_queue(tx_queue, efx) {
637 rc |= efx_test_loopback(tx_queue,
638 &tests->loopback[mode]);
639 if (rc)
640 goto out;
641 }
642 }
643
644 out:
645 /* Take out of loopback and restore PHY settings */
646 state->flush = 1;
647 efx->loopback_mode = old_mode;
648 efx_ethtool_set_settings(efx->net_dev, &ecmd);
649
650 return rc;
651 }
652
653 /**************************************************************************
654 *
655 * Entry points
656 *
657 *************************************************************************/
658
659 /* Online (i.e. non-disruptive) testing
660 * This checks interrupt generation, event delivery and PHY presence. */
661 int efx_online_test(struct efx_nic *efx, struct efx_self_tests *tests)
662 {
663 struct efx_channel *channel;
664 int rc = 0;
665
666 EFX_LOG(efx, "performing online self-tests\n");
667
668 rc |= efx_test_interrupts(efx, tests);
669 efx_for_each_channel(channel, efx) {
670 if (channel->has_interrupt)
671 rc |= efx_test_eventq_irq(channel, tests);
672 else
673 rc |= efx_test_eventq(channel, tests);
674 }
675 rc |= efx_test_phy(efx, tests);
676
677 if (rc)
678 EFX_ERR(efx, "failed online self-tests\n");
679
680 return rc;
681 }
682
683 /* Offline (i.e. disruptive) testing
684 * This checks MAC and PHY loopback on the specified port. */
685 int efx_offline_test(struct efx_nic *efx,
686 struct efx_self_tests *tests, unsigned int loopback_modes)
687 {
688 struct efx_selftest_state *state;
689 int rc = 0;
690
691 EFX_LOG(efx, "performing offline self-tests\n");
692
693 /* Create a selftest_state structure to hold state for the test */
694 state = kzalloc(sizeof(*state), GFP_KERNEL);
695 if (state == NULL) {
696 rc = -ENOMEM;
697 goto out;
698 }
699
700 /* Set the port loopback_selftest member. From this point on
701 * all received packets will be dropped. Mark the state as
702 * "flushing" so all inflight packets are dropped */
703 BUG_ON(efx->loopback_selftest);
704 state->flush = 1;
705 efx->loopback_selftest = state;
706
707 rc = efx_test_loopbacks(efx, tests, loopback_modes);
708
709 efx->loopback_selftest = NULL;
710 wmb();
711 kfree(state);
712
713 out:
714 if (rc)
715 EFX_ERR(efx, "failed offline self-tests\n");
716
717 return rc;
718 }
719
kmemtrace - Kernel memory tracer