1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2010 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 <linux/slab.h>
22 #include "net_driver.h"
23 #include "efx.h"
24 #include "nic.h"
25 #include "selftest.h"
26 #include "workarounds.h"
27
28 /* IRQ latency can be enormous because:
29 * - All IRQs may be disabled on a CPU for a *long* time by e.g. a
30 * slow serial console or an old IDE driver doing error recovery
31 * - The PREEMPT_RT patches mostly deal with this, but also allow a
32 * tasklet or normal task to be given higher priority than our IRQ
33 * threads
34 * Try to avoid blaming the hardware for this.
35 */
36 #define IRQ_TIMEOUT HZ
37
38 /*
39 * Loopback test packet structure
40 *
41 * The self-test should stress every RSS vector, and unfortunately
42 * Falcon only performs RSS on TCP/UDP packets.
43 */
44 struct efx_loopback_payload {
45 struct ethhdr header;
46 struct iphdr ip;
47 struct udphdr udp;
48 __be16 iteration;
49 const char msg[64];
50 } __packed;
51
52 /* Loopback test source MAC address */
53 static const unsigned char payload_source[ETH_ALEN] = {
54 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b,
55 };
56
57 static const char payload_msg[] =
58 "Hello world! This is an Efx loopback test in progress!";
59
60 /* Interrupt mode names */
61 static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX;
62 static const char *const efx_interrupt_mode_names[] = {
63 [EFX_INT_MODE_MSIX] = "MSI-X",
64 [EFX_INT_MODE_MSI] = "MSI",
65 [EFX_INT_MODE_LEGACY] = "legacy",
66 };
67 #define INT_MODE(efx) \
68 STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode)
69
70 /**
71 * efx_loopback_state - persistent state during a loopback selftest
72 * @flush: Drop all packets in efx_loopback_rx_packet
73 * @packet_count: Number of packets being used in this test
74 * @skbs: An array of skbs transmitted
75 * @offload_csum: Checksums are being offloaded
76 * @rx_good: RX good packet count
77 * @rx_bad: RX bad packet count
78 * @payload: Payload used in tests
79 */
80 struct efx_loopback_state {
81 bool flush;
82 int packet_count;
83 struct sk_buff **skbs;
84 bool offload_csum;
85 atomic_t rx_good;
86 atomic_t rx_bad;
87 struct efx_loopback_payload payload;
88 };
89
90 /* How long to wait for all the packets to arrive (in ms) */
91 #define LOOPBACK_TIMEOUT_MS 1000
92
93 /**************************************************************************
94 *
95 * MII, NVRAM and register tests
96 *
97 **************************************************************************/
98
efx_test_phy_alive(struct efx_nic * efx,struct efx_self_tests * tests)99 static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests)
100 {
101 int rc = 0;
102
103 if (efx->phy_op->test_alive) {
104 rc = efx->phy_op->test_alive(efx);
105 tests->phy_alive = rc ? -1 : 1;
106 }
107
108 return rc;
109 }
110
efx_test_nvram(struct efx_nic * efx,struct efx_self_tests * tests)111 static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests)
112 {
113 int rc = 0;
114
115 if (efx->type->test_nvram) {
116 rc = efx->type->test_nvram(efx);
117 tests->nvram = rc ? -1 : 1;
118 }
119
120 return rc;
121 }
122
123 /**************************************************************************
124 *
125 * Interrupt and event queue testing
126 *
127 **************************************************************************/
128
129 /* Test generation and receipt of interrupts */
efx_test_interrupts(struct efx_nic * efx,struct efx_self_tests * tests)130 static int efx_test_interrupts(struct efx_nic *efx,
131 struct efx_self_tests *tests)
132 {
133 unsigned long timeout, wait;
134 int cpu;
135
136 netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n");
137 tests->interrupt = -1;
138
139 efx_nic_irq_test_start(efx);
140 timeout = jiffies + IRQ_TIMEOUT;
141 wait = 1;
142
143 /* Wait for arrival of test interrupt. */
144 netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n");
145 do {
146 schedule_timeout_uninterruptible(wait);
147 cpu = efx_nic_irq_test_irq_cpu(efx);
148 if (cpu >= 0)
149 goto success;
150 wait *= 2;
151 } while (time_before(jiffies, timeout));
152
153 netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n");
154 return -ETIMEDOUT;
155
156 success:
157 netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n",
158 INT_MODE(efx), cpu);
159 tests->interrupt = 1;
160 return 0;
161 }
162
163 /* Test generation and receipt of interrupting events */
efx_test_eventq_irq(struct efx_nic * efx,struct efx_self_tests * tests)164 static int efx_test_eventq_irq(struct efx_nic *efx,
165 struct efx_self_tests *tests)
166 {
167 struct efx_channel *channel;
168 unsigned int read_ptr[EFX_MAX_CHANNELS];
169 unsigned long napi_ran = 0, dma_pend = 0, int_pend = 0;
170 unsigned long timeout, wait;
171
172 BUILD_BUG_ON(EFX_MAX_CHANNELS > BITS_PER_LONG);
173
174 efx_for_each_channel(channel, efx) {
175 read_ptr[channel->channel] = channel->eventq_read_ptr;
176 set_bit(channel->channel, &dma_pend);
177 set_bit(channel->channel, &int_pend);
178 efx_nic_event_test_start(channel);
179 }
180
181 timeout = jiffies + IRQ_TIMEOUT;
182 wait = 1;
183
184 /* Wait for arrival of interrupts. NAPI processing may or may
185 * not complete in time, but we can cope in any case.
186 */
187 do {
188 schedule_timeout_uninterruptible(wait);
189
190 efx_for_each_channel(channel, efx) {
191 napi_disable(&channel->napi_str);
192 if (channel->eventq_read_ptr !=
193 read_ptr[channel->channel]) {
194 set_bit(channel->channel, &napi_ran);
195 clear_bit(channel->channel, &dma_pend);
196 clear_bit(channel->channel, &int_pend);
197 } else {
198 if (efx_nic_event_present(channel))
199 clear_bit(channel->channel, &dma_pend);
200 if (efx_nic_event_test_irq_cpu(channel) >= 0)
201 clear_bit(channel->channel, &int_pend);
202 }
203 napi_enable(&channel->napi_str);
204 efx_nic_eventq_read_ack(channel);
205 }
206
207 wait *= 2;
208 } while ((dma_pend || int_pend) && time_before(jiffies, timeout));
209
210 efx_for_each_channel(channel, efx) {
211 bool dma_seen = !test_bit(channel->channel, &dma_pend);
212 bool int_seen = !test_bit(channel->channel, &int_pend);
213
214 tests->eventq_dma[channel->channel] = dma_seen ? 1 : -1;
215 tests->eventq_int[channel->channel] = int_seen ? 1 : -1;
216
217 if (dma_seen && int_seen) {
218 netif_dbg(efx, drv, efx->net_dev,
219 "channel %d event queue passed (with%s NAPI)\n",
220 channel->channel,
221 test_bit(channel->channel, &napi_ran) ?
222 "" : "out");
223 } else {
224 /* Report failure and whether either interrupt or DMA
225 * worked
226 */
227 netif_err(efx, drv, efx->net_dev,
228 "channel %d timed out waiting for event queue\n",
229 channel->channel);
230 if (int_seen)
231 netif_err(efx, drv, efx->net_dev,
232 "channel %d saw interrupt "
233 "during event queue test\n",
234 channel->channel);
235 if (dma_seen)
236 netif_err(efx, drv, efx->net_dev,
237 "channel %d event was generated, but "
238 "failed to trigger an interrupt\n",
239 channel->channel);
240 }
241 }
242
243 return (dma_pend || int_pend) ? -ETIMEDOUT : 0;
244 }
245
efx_test_phy(struct efx_nic * efx,struct efx_self_tests * tests,unsigned flags)246 static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests,
247 unsigned flags)
248 {
249 int rc;
250
251 if (!efx->phy_op->run_tests)
252 return 0;
253
254 mutex_lock(&efx->mac_lock);
255 rc = efx->phy_op->run_tests(efx, tests->phy_ext, flags);
256 mutex_unlock(&efx->mac_lock);
257 return rc;
258 }
259
260 /**************************************************************************
261 *
262 * Loopback testing
263 * NB Only one loopback test can be executing concurrently.
264 *
265 **************************************************************************/
266
267 /* Loopback test RX callback
268 * This is called for each received packet during loopback testing.
269 */
efx_loopback_rx_packet(struct efx_nic * efx,const char * buf_ptr,int pkt_len)270 void efx_loopback_rx_packet(struct efx_nic *efx,
271 const char *buf_ptr, int pkt_len)
272 {
273 struct efx_loopback_state *state = efx->loopback_selftest;
274 struct efx_loopback_payload *received;
275 struct efx_loopback_payload *payload;
276
277 BUG_ON(!buf_ptr);
278
279 /* If we are just flushing, then drop the packet */
280 if ((state == NULL) || state->flush)
281 return;
282
283 payload = &state->payload;
284
285 received = (struct efx_loopback_payload *) buf_ptr;
286 received->ip.saddr = payload->ip.saddr;
287 if (state->offload_csum)
288 received->ip.check = payload->ip.check;
289
290 /* Check that header exists */
291 if (pkt_len < sizeof(received->header)) {
292 netif_err(efx, drv, efx->net_dev,
293 "saw runt RX packet (length %d) in %s loopback "
294 "test\n", pkt_len, LOOPBACK_MODE(efx));
295 goto err;
296 }
297
298 /* Check that the ethernet header exists */
299 if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) {
300 netif_err(efx, drv, efx->net_dev,
301 "saw non-loopback RX packet in %s loopback test\n",
302 LOOPBACK_MODE(efx));
303 goto err;
304 }
305
306 /* Check packet length */
307 if (pkt_len != sizeof(*payload)) {
308 netif_err(efx, drv, efx->net_dev,
309 "saw incorrect RX packet length %d (wanted %d) in "
310 "%s loopback test\n", pkt_len, (int)sizeof(*payload),
311 LOOPBACK_MODE(efx));
312 goto err;
313 }
314
315 /* Check that IP header matches */
316 if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) {
317 netif_err(efx, drv, efx->net_dev,
318 "saw corrupted IP header in %s loopback test\n",
319 LOOPBACK_MODE(efx));
320 goto err;
321 }
322
323 /* Check that msg and padding matches */
324 if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) {
325 netif_err(efx, drv, efx->net_dev,
326 "saw corrupted RX packet in %s loopback test\n",
327 LOOPBACK_MODE(efx));
328 goto err;
329 }
330
331 /* Check that iteration matches */
332 if (received->iteration != payload->iteration) {
333 netif_err(efx, drv, efx->net_dev,
334 "saw RX packet from iteration %d (wanted %d) in "
335 "%s loopback test\n", ntohs(received->iteration),
336 ntohs(payload->iteration), LOOPBACK_MODE(efx));
337 goto err;
338 }
339
340 /* Increase correct RX count */
341 netif_vdbg(efx, drv, efx->net_dev,
342 "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx));
343
344 atomic_inc(&state->rx_good);
345 return;
346
347 err:
348 #ifdef DEBUG
349 if (atomic_read(&state->rx_bad) == 0) {
350 netif_err(efx, drv, efx->net_dev, "received packet:\n");
351 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
352 buf_ptr, pkt_len, 0);
353 netif_err(efx, drv, efx->net_dev, "expected packet:\n");
354 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
355 &state->payload, sizeof(state->payload), 0);
356 }
357 #endif
358 atomic_inc(&state->rx_bad);
359 }
360
361 /* Initialise an efx_selftest_state for a new iteration */
efx_iterate_state(struct efx_nic * efx)362 static void efx_iterate_state(struct efx_nic *efx)
363 {
364 struct efx_loopback_state *state = efx->loopback_selftest;
365 struct net_device *net_dev = efx->net_dev;
366 struct efx_loopback_payload *payload = &state->payload;
367
368 /* Initialise the layerII header */
369 memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN);
370 memcpy(&payload->header.h_source, &payload_source, ETH_ALEN);
371 payload->header.h_proto = htons(ETH_P_IP);
372
373 /* saddr set later and used as incrementing count */
374 payload->ip.daddr = htonl(INADDR_LOOPBACK);
375 payload->ip.ihl = 5;
376 payload->ip.check = htons(0xdead);
377 payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr));
378 payload->ip.version = IPVERSION;
379 payload->ip.protocol = IPPROTO_UDP;
380
381 /* Initialise udp header */
382 payload->udp.source = 0;
383 payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) -
384 sizeof(struct iphdr));
385 payload->udp.check = 0; /* checksum ignored */
386
387 /* Fill out payload */
388 payload->iteration = htons(ntohs(payload->iteration) + 1);
389 memcpy(&payload->msg, payload_msg, sizeof(payload_msg));
390
391 /* Fill out remaining state members */
392 atomic_set(&state->rx_good, 0);
393 atomic_set(&state->rx_bad, 0);
394 smp_wmb();
395 }
396
efx_begin_loopback(struct efx_tx_queue * tx_queue)397 static int efx_begin_loopback(struct efx_tx_queue *tx_queue)
398 {
399 struct efx_nic *efx = tx_queue->efx;
400 struct efx_loopback_state *state = efx->loopback_selftest;
401 struct efx_loopback_payload *payload;
402 struct sk_buff *skb;
403 int i;
404 netdev_tx_t 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 netif_tx_lock_bh(efx->net_dev);
428 rc = efx_enqueue_skb(tx_queue, skb);
429 netif_tx_unlock_bh(efx->net_dev);
430
431 if (rc != NETDEV_TX_OK) {
432 netif_err(efx, drv, efx->net_dev,
433 "TX queue %d could not transmit packet %d of "
434 "%d in %s loopback test\n", tx_queue->queue,
435 i + 1, state->packet_count,
436 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
efx_poll_loopback(struct efx_nic * efx)447 static int efx_poll_loopback(struct efx_nic *efx)
448 {
449 struct efx_loopback_state *state = efx->loopback_selftest;
450 struct efx_channel *channel;
451
452 /* NAPI polling is not enabled, so process channels
453 * synchronously */
454 efx_for_each_channel(channel, efx) {
455 if (channel->work_pending)
456 efx_process_channel_now(channel);
457 }
458 return atomic_read(&state->rx_good) == state->packet_count;
459 }
460
efx_end_loopback(struct efx_tx_queue * tx_queue,struct efx_loopback_self_tests * lb_tests)461 static int efx_end_loopback(struct efx_tx_queue *tx_queue,
462 struct efx_loopback_self_tests *lb_tests)
463 {
464 struct efx_nic *efx = tx_queue->efx;
465 struct efx_loopback_state *state = efx->loopback_selftest;
466 struct sk_buff *skb;
467 int tx_done = 0, rx_good, rx_bad;
468 int i, rc = 0;
469
470 netif_tx_lock_bh(efx->net_dev);
471
472 /* Count the number of tx completions, and decrement the refcnt. Any
473 * skbs not already completed will be free'd when the queue is flushed */
474 for (i = 0; i < state->packet_count; i++) {
475 skb = state->skbs[i];
476 if (skb && !skb_shared(skb))
477 ++tx_done;
478 dev_kfree_skb_any(skb);
479 }
480
481 netif_tx_unlock_bh(efx->net_dev);
482
483 /* Check TX completion and received packet counts */
484 rx_good = atomic_read(&state->rx_good);
485 rx_bad = atomic_read(&state->rx_bad);
486 if (tx_done != state->packet_count) {
487 /* Don't free the skbs; they will be picked up on TX
488 * overflow or channel teardown.
489 */
490 netif_err(efx, drv, efx->net_dev,
491 "TX queue %d saw only %d out of an expected %d "
492 "TX completion events in %s loopback test\n",
493 tx_queue->queue, tx_done, state->packet_count,
494 LOOPBACK_MODE(efx));
495 rc = -ETIMEDOUT;
496 /* Allow to fall through so we see the RX errors as well */
497 }
498
499 /* We may always be up to a flush away from our desired packet total */
500 if (rx_good != state->packet_count) {
501 netif_dbg(efx, drv, efx->net_dev,
502 "TX queue %d saw only %d out of an expected %d "
503 "received packets in %s loopback test\n",
504 tx_queue->queue, rx_good, state->packet_count,
505 LOOPBACK_MODE(efx));
506 rc = -ETIMEDOUT;
507 /* Fall through */
508 }
509
510 /* Update loopback test structure */
511 lb_tests->tx_sent[tx_queue->queue] += state->packet_count;
512 lb_tests->tx_done[tx_queue->queue] += tx_done;
513 lb_tests->rx_good += rx_good;
514 lb_tests->rx_bad += rx_bad;
515
516 return rc;
517 }
518
519 static int
efx_test_loopback(struct efx_tx_queue * tx_queue,struct efx_loopback_self_tests * lb_tests)520 efx_test_loopback(struct efx_tx_queue *tx_queue,
521 struct efx_loopback_self_tests *lb_tests)
522 {
523 struct efx_nic *efx = tx_queue->efx;
524 struct efx_loopback_state *state = efx->loopback_selftest;
525 int i, begin_rc, end_rc;
526
527 for (i = 0; i < 3; i++) {
528 /* Determine how many packets to send */
529 state->packet_count = efx->txq_entries / 3;
530 state->packet_count = min(1 << (i << 2), state->packet_count);
531 state->skbs = kcalloc(state->packet_count,
532 sizeof(state->skbs[0]), GFP_KERNEL);
533 if (!state->skbs)
534 return -ENOMEM;
535 state->flush = false;
536
537 netif_dbg(efx, drv, efx->net_dev,
538 "TX queue %d testing %s loopback with %d packets\n",
539 tx_queue->queue, LOOPBACK_MODE(efx),
540 state->packet_count);
541
542 efx_iterate_state(efx);
543 begin_rc = efx_begin_loopback(tx_queue);
544
545 /* This will normally complete very quickly, but be
546 * prepared to wait much longer. */
547 msleep(1);
548 if (!efx_poll_loopback(efx)) {
549 msleep(LOOPBACK_TIMEOUT_MS);
550 efx_poll_loopback(efx);
551 }
552
553 end_rc = efx_end_loopback(tx_queue, lb_tests);
554 kfree(state->skbs);
555
556 if (begin_rc || end_rc) {
557 /* Wait a while to ensure there are no packets
558 * floating around after a failure. */
559 schedule_timeout_uninterruptible(HZ / 10);
560 return begin_rc ? begin_rc : end_rc;
561 }
562 }
563
564 netif_dbg(efx, drv, efx->net_dev,
565 "TX queue %d passed %s loopback test with a burst length "
566 "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx),
567 state->packet_count);
568
569 return 0;
570 }
571
572 /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but
573 * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it
574 * to delay and retry. Therefore, it's safer to just poll directly. Wait
575 * for link up and any faults to dissipate. */
efx_wait_for_link(struct efx_nic * efx)576 static int efx_wait_for_link(struct efx_nic *efx)
577 {
578 struct efx_link_state *link_state = &efx->link_state;
579 int count, link_up_count = 0;
580 bool link_up;
581
582 for (count = 0; count < 40; count++) {
583 schedule_timeout_uninterruptible(HZ / 10);
584
585 if (efx->type->monitor != NULL) {
586 mutex_lock(&efx->mac_lock);
587 efx->type->monitor(efx);
588 mutex_unlock(&efx->mac_lock);
589 } else {
590 struct efx_channel *channel = efx_get_channel(efx, 0);
591 if (channel->work_pending)
592 efx_process_channel_now(channel);
593 }
594
595 mutex_lock(&efx->mac_lock);
596 link_up = link_state->up;
597 if (link_up)
598 link_up = !efx->type->check_mac_fault(efx);
599 mutex_unlock(&efx->mac_lock);
600
601 if (link_up) {
602 if (++link_up_count == 2)
603 return 0;
604 } else {
605 link_up_count = 0;
606 }
607 }
608
609 return -ETIMEDOUT;
610 }
611
efx_test_loopbacks(struct efx_nic * efx,struct efx_self_tests * tests,unsigned int loopback_modes)612 static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests,
613 unsigned int loopback_modes)
614 {
615 enum efx_loopback_mode mode;
616 struct efx_loopback_state *state;
617 struct efx_channel *channel = efx_get_channel(efx, 0);
618 struct efx_tx_queue *tx_queue;
619 int rc = 0;
620
621 /* Set the port loopback_selftest member. From this point on
622 * all received packets will be dropped. Mark the state as
623 * "flushing" so all inflight packets are dropped */
624 state = kzalloc(sizeof(*state), GFP_KERNEL);
625 if (state == NULL)
626 return -ENOMEM;
627 BUG_ON(efx->loopback_selftest);
628 state->flush = true;
629 efx->loopback_selftest = state;
630
631 /* Test all supported loopback modes */
632 for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) {
633 if (!(loopback_modes & (1 << mode)))
634 continue;
635
636 /* Move the port into the specified loopback mode. */
637 state->flush = true;
638 mutex_lock(&efx->mac_lock);
639 efx->loopback_mode = mode;
640 rc = __efx_reconfigure_port(efx);
641 mutex_unlock(&efx->mac_lock);
642 if (rc) {
643 netif_err(efx, drv, efx->net_dev,
644 "unable to move into %s loopback\n",
645 LOOPBACK_MODE(efx));
646 goto out;
647 }
648
649 rc = efx_wait_for_link(efx);
650 if (rc) {
651 netif_err(efx, drv, efx->net_dev,
652 "loopback %s never came up\n",
653 LOOPBACK_MODE(efx));
654 goto out;
655 }
656
657 /* Test all enabled types of TX queue */
658 efx_for_each_channel_tx_queue(tx_queue, channel) {
659 state->offload_csum = (tx_queue->queue &
660 EFX_TXQ_TYPE_OFFLOAD);
661 rc = efx_test_loopback(tx_queue,
662 &tests->loopback[mode]);
663 if (rc)
664 goto out;
665 }
666 }
667
668 out:
669 /* Remove the flush. The caller will remove the loopback setting */
670 state->flush = true;
671 efx->loopback_selftest = NULL;
672 wmb();
673 kfree(state);
674
675 return rc;
676 }
677
678 /**************************************************************************
679 *
680 * Entry point
681 *
682 *************************************************************************/
683
efx_selftest(struct efx_nic * efx,struct efx_self_tests * tests,unsigned flags)684 int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests,
685 unsigned flags)
686 {
687 enum efx_loopback_mode loopback_mode = efx->loopback_mode;
688 int phy_mode = efx->phy_mode;
689 int rc_test = 0, rc_reset, rc;
690
691 efx_selftest_async_cancel(efx);
692
693 /* Online (i.e. non-disruptive) testing
694 * This checks interrupt generation, event delivery and PHY presence. */
695
696 rc = efx_test_phy_alive(efx, tests);
697 if (rc && !rc_test)
698 rc_test = rc;
699
700 rc = efx_test_nvram(efx, tests);
701 if (rc && !rc_test)
702 rc_test = rc;
703
704 rc = efx_test_interrupts(efx, tests);
705 if (rc && !rc_test)
706 rc_test = rc;
707
708 rc = efx_test_eventq_irq(efx, tests);
709 if (rc && !rc_test)
710 rc_test = rc;
711
712 if (rc_test)
713 return rc_test;
714
715 if (!(flags & ETH_TEST_FL_OFFLINE))
716 return efx_test_phy(efx, tests, flags);
717
718 /* Offline (i.e. disruptive) testing
719 * This checks MAC and PHY loopback on the specified port. */
720
721 /* Detach the device so the kernel doesn't transmit during the
722 * loopback test and the watchdog timeout doesn't fire.
723 */
724 efx_device_detach_sync(efx);
725
726 if (efx->type->test_chip) {
727 rc_reset = efx->type->test_chip(efx, tests);
728 if (rc_reset) {
729 netif_err(efx, hw, efx->net_dev,
730 "Unable to recover from chip test\n");
731 efx_schedule_reset(efx, RESET_TYPE_DISABLE);
732 return rc_reset;
733 }
734
735 if ((tests->registers < 0) && !rc_test)
736 rc_test = -EIO;
737 }
738
739 /* Ensure that the phy is powered and out of loopback
740 * for the bist and loopback tests */
741 mutex_lock(&efx->mac_lock);
742 efx->phy_mode &= ~PHY_MODE_LOW_POWER;
743 efx->loopback_mode = LOOPBACK_NONE;
744 __efx_reconfigure_port(efx);
745 mutex_unlock(&efx->mac_lock);
746
747 rc = efx_test_phy(efx, tests, flags);
748 if (rc && !rc_test)
749 rc_test = rc;
750
751 rc = efx_test_loopbacks(efx, tests, efx->loopback_modes);
752 if (rc && !rc_test)
753 rc_test = rc;
754
755 /* restore the PHY to the previous state */
756 mutex_lock(&efx->mac_lock);
757 efx->phy_mode = phy_mode;
758 efx->loopback_mode = loopback_mode;
759 __efx_reconfigure_port(efx);
760 mutex_unlock(&efx->mac_lock);
761
762 netif_device_attach(efx->net_dev);
763
764 return rc_test;
765 }
766
efx_selftest_async_start(struct efx_nic * efx)767 void efx_selftest_async_start(struct efx_nic *efx)
768 {
769 struct efx_channel *channel;
770
771 efx_for_each_channel(channel, efx)
772 efx_nic_event_test_start(channel);
773 schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT);
774 }
775
efx_selftest_async_cancel(struct efx_nic * efx)776 void efx_selftest_async_cancel(struct efx_nic *efx)
777 {
778 cancel_delayed_work_sync(&efx->selftest_work);
779 }
780
efx_selftest_async_work(struct work_struct * data)781 void efx_selftest_async_work(struct work_struct *data)
782 {
783 struct efx_nic *efx = container_of(data, struct efx_nic,
784 selftest_work.work);
785 struct efx_channel *channel;
786 int cpu;
787
788 efx_for_each_channel(channel, efx) {
789 cpu = efx_nic_event_test_irq_cpu(channel);
790 if (cpu < 0)
791 netif_err(efx, ifup, efx->net_dev,
792 "channel %d failed to trigger an interrupt\n",
793 channel->channel);
794 else
795 netif_dbg(efx, ifup, efx->net_dev,
796 "channel %d triggered interrupt on CPU %d\n",
797 channel->channel, cpu);
798 }
799 }
800