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sfc: Add support for sub-10G speeds
[linux-2.6/verdex.git] / drivers / net / sfc / selftest.c
blob8142e37a518f9aa4044699fb802439fb7e6d42f0
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 "spi.h"
30 #include "falcon_io.h"
31 #include "mdio_10g.h"
32
33 /*
34 * Loopback test packet structure
35 *
36 * The self-test should stress every RSS vector, and unfortunately
37 * Falcon only performs RSS on TCP/UDP packets.
38 */
39 struct efx_loopback_payload {
40 struct ethhdr header;
41 struct iphdr ip;
42 struct udphdr udp;
43 __be16 iteration;
44 const char msg[64];
45 } __attribute__ ((packed));
46
47 /* Loopback test source MAC address */
48 static const unsigned char payload_source[ETH_ALEN] = {
49 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b,
50 };
51
52 static const char *payload_msg =
53 "Hello world! This is an Efx loopback test in progress!";
54
55 /**
56 * efx_loopback_state - persistent state during a loopback selftest
57 * @flush: Drop all packets in efx_loopback_rx_packet
58 * @packet_count: Number of packets being used in this test
59 * @skbs: An array of skbs transmitted
60 * @rx_good: RX good packet count
61 * @rx_bad: RX bad packet count
62 * @payload: Payload used in tests
63 */
64 struct efx_loopback_state {
65 bool flush;
66 int packet_count;
67 struct sk_buff **skbs;
68
69 /* Checksums are being offloaded */
70 bool offload_csum;
71
72 atomic_t rx_good;
73 atomic_t rx_bad;
74 struct efx_loopback_payload payload;
75 };
76
77 /**************************************************************************
78 *
79 * MII, NVRAM and register tests
80 *
81 **************************************************************************/
82
83 static int efx_test_mii(struct efx_nic *efx, struct efx_self_tests *tests)
84 {
85 int rc = 0;
86 u16 physid1, physid2;
87 struct mii_if_info *mii = &efx->mii;
88 struct net_device *net_dev = efx->net_dev;
89
90 if (efx->phy_type == PHY_TYPE_NONE)
91 return 0;
92
93 mutex_lock(&efx->mac_lock);
94 tests->mii = -1;
95
96 physid1 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID1);
97 physid2 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID2);
98
99 if ((physid1 == 0x0000) || (physid1 == 0xffff) ||
100 (physid2 == 0x0000) || (physid2 == 0xffff)) {
101 EFX_ERR(efx, "no MII PHY present with ID %d\n",
102 mii->phy_id);
103 rc = -EINVAL;
104 goto out;
105 }
106
107 if (EFX_IS10G(efx)) {
108 rc = mdio_clause45_check_mmds(efx, efx->phy_op->mmds, 0);
109 if (rc)
110 goto out;
111 }
112
113 out:
114 mutex_unlock(&efx->mac_lock);
115 tests->mii = rc ? -1 : 1;
116 return rc;
117 }
118
119 static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests)
120 {
121 int rc;
122
123 rc = falcon_read_nvram(efx, NULL);
124 tests->nvram = rc ? -1 : 1;
125 return rc;
126 }
127
128 static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests)
129 {
130 int rc;
131
132 /* Not supported on A-series silicon */
133 if (falcon_rev(efx) < FALCON_REV_B0)
134 return 0;
135
136 rc = falcon_test_registers(efx);
137 tests->registers = rc ? -1 : 1;
138 return rc;
139 }
140
141 /**************************************************************************
142 *
143 * Interrupt and event queue testing
144 *
145 **************************************************************************/
146
147 /* Test generation and receipt of interrupts */
148 static int efx_test_interrupts(struct efx_nic *efx,
149 struct efx_self_tests *tests)
150 {
151 struct efx_channel *channel;
152
153 EFX_LOG(efx, "testing interrupts\n");
154 tests->interrupt = -1;
155
156 /* Reset interrupt flag */
157 efx->last_irq_cpu = -1;
158 smp_wmb();
159
160 /* ACK each interrupting event queue. Receiving an interrupt due to
161 * traffic before a test event is raised is considered a pass */
162 efx_for_each_channel(channel, efx) {
163 if (channel->work_pending)
164 efx_process_channel_now(channel);
165 if (efx->last_irq_cpu >= 0)
166 goto success;
167 }
168
169 falcon_generate_interrupt(efx);
170
171 /* Wait for arrival of test interrupt. */
172 EFX_LOG(efx, "waiting for test interrupt\n");
173 schedule_timeout_uninterruptible(HZ / 10);
174 if (efx->last_irq_cpu >= 0)
175 goto success;
176
177 EFX_ERR(efx, "timed out waiting for interrupt\n");
178 return -ETIMEDOUT;
179
180 success:
181 EFX_LOG(efx, "test interrupt (mode %d) seen on CPU%d\n",
182 efx->interrupt_mode, efx->last_irq_cpu);
183 tests->interrupt = 1;
184 return 0;
185 }
186
187 /* Test generation and receipt of interrupting events */
188 static int efx_test_eventq_irq(struct efx_channel *channel,
189 struct efx_self_tests *tests)
190 {
191 unsigned int magic, count;
192
193 /* Channel specific code, limited to 20 bits */
194 magic = (0x00010150 + channel->channel);
195 EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n",
196 channel->channel, magic);
197
198 tests->eventq_dma[channel->channel] = -1;
199 tests->eventq_int[channel->channel] = -1;
200 tests->eventq_poll[channel->channel] = -1;
201
202 /* Reset flag and zero magic word */
203 channel->efx->last_irq_cpu = -1;
204 channel->eventq_magic = 0;
205 smp_wmb();
206
207 falcon_generate_test_event(channel, magic);
208
209 /* Wait for arrival of interrupt */
210 count = 0;
211 do {
212 schedule_timeout_uninterruptible(HZ / 100);
213
214 if (channel->work_pending)
215 efx_process_channel_now(channel);
216
217 if (channel->eventq_magic == magic)
218 goto eventq_ok;
219 } while (++count < 2);
220
221 EFX_ERR(channel->efx, "channel %d timed out waiting for event queue\n",
222 channel->channel);
223
224 /* See if interrupt arrived */
225 if (channel->efx->last_irq_cpu >= 0) {
226 EFX_ERR(channel->efx, "channel %d saw interrupt on CPU%d "
227 "during event queue test\n", channel->channel,
228 raw_smp_processor_id());
229 tests->eventq_int[channel->channel] = 1;
230 }
231
232 /* Check to see if event was received even if interrupt wasn't */
233 efx_process_channel_now(channel);
234 if (channel->eventq_magic == magic) {
235 EFX_ERR(channel->efx, "channel %d event was generated, but "
236 "failed to trigger an interrupt\n", channel->channel);
237 tests->eventq_dma[channel->channel] = 1;
238 }
239
240 return -ETIMEDOUT;
241 eventq_ok:
242 EFX_LOG(channel->efx, "channel %d event queue passed\n",
243 channel->channel);
244 tests->eventq_dma[channel->channel] = 1;
245 tests->eventq_int[channel->channel] = 1;
246 tests->eventq_poll[channel->channel] = 1;
247 return 0;
248 }
249
250 static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests)
251 {
252 int rc;
253
254 if (!efx->phy_op->test)
255 return 0;
256
257 mutex_lock(&efx->mac_lock);
258 rc = efx->phy_op->test(efx);
259 mutex_unlock(&efx->mac_lock);
260 tests->phy = rc ? -1 : 1;
261 return rc;
262 }
263
264 /**************************************************************************
265 *
266 * Loopback testing
267 * NB Only one loopback test can be executing concurrently.
268 *
269 **************************************************************************/
270
271 /* Loopback test RX callback
272 * This is called for each received packet during loopback testing.
273 */
274 void efx_loopback_rx_packet(struct efx_nic *efx,
275 const char *buf_ptr, int pkt_len)
276 {
277 struct efx_loopback_state *state = efx->loopback_selftest;
278 struct efx_loopback_payload *received;
279 struct efx_loopback_payload *payload;
280
281 BUG_ON(!buf_ptr);
282
283 /* If we are just flushing, then drop the packet */
284 if ((state == NULL) || state->flush)
285 return;
286
287 payload = &state->payload;
288
289 received = (struct efx_loopback_payload *) buf_ptr;
290 received->ip.saddr = payload->ip.saddr;
291 if (state->offload_csum)
292 received->ip.check = payload->ip.check;
293
294 /* Check that header exists */
295 if (pkt_len < sizeof(received->header)) {
296 EFX_ERR(efx, "saw runt RX packet (length %d) in %s loopback "
297 "test\n", pkt_len, LOOPBACK_MODE(efx));
298 goto err;
299 }
300
301 /* Check that the ethernet header exists */
302 if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) {
303 EFX_ERR(efx, "saw non-loopback RX packet in %s loopback test\n",
304 LOOPBACK_MODE(efx));
305 goto err;
306 }
307
308 /* Check packet length */
309 if (pkt_len != sizeof(*payload)) {
310 EFX_ERR(efx, "saw incorrect RX packet length %d (wanted %d) in "
311 "%s loopback test\n", pkt_len, (int)sizeof(*payload),
312 LOOPBACK_MODE(efx));
313 goto err;
314 }
315
316 /* Check that IP header matches */
317 if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) {
318 EFX_ERR(efx, "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 EFX_ERR(efx, "saw corrupted RX packet in %s loopback test\n",
326 LOOPBACK_MODE(efx));
327 goto err;
328 }
329
330 /* Check that iteration matches */
331 if (received->iteration != payload->iteration) {
332 EFX_ERR(efx, "saw RX packet from iteration %d (wanted %d) in "
333 "%s loopback test\n", ntohs(received->iteration),
334 ntohs(payload->iteration), LOOPBACK_MODE(efx));
335 goto err;
336 }
337
338 /* Increase correct RX count */
339 EFX_TRACE(efx, "got loopback RX in %s loopback test\n",
340 LOOPBACK_MODE(efx));
341
342 atomic_inc(&state->rx_good);
343 return;
344
345 err:
346 #ifdef EFX_ENABLE_DEBUG
347 if (atomic_read(&state->rx_bad) == 0) {
348 EFX_ERR(efx, "received packet:\n");
349 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
350 buf_ptr, pkt_len, 0);
351 EFX_ERR(efx, "expected packet:\n");
352 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
353 &state->payload, sizeof(state->payload), 0);
354 }
355 #endif
356 atomic_inc(&state->rx_bad);
357 }
358
359 /* Initialise an efx_selftest_state for a new iteration */
360 static void efx_iterate_state(struct efx_nic *efx)
361 {
362 struct efx_loopback_state *state = efx->loopback_selftest;
363 struct net_device *net_dev = efx->net_dev;
364 struct efx_loopback_payload *payload = &state->payload;
365
366 /* Initialise the layerII header */
367 memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN);
368 memcpy(&payload->header.h_source, &payload_source, ETH_ALEN);
369 payload->header.h_proto = htons(ETH_P_IP);
370
371 /* saddr set later and used as incrementing count */
372 payload->ip.daddr = htonl(INADDR_LOOPBACK);
373 payload->ip.ihl = 5;
374 payload->ip.check = htons(0xdead);
375 payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr));
376 payload->ip.version = IPVERSION;
377 payload->ip.protocol = IPPROTO_UDP;
378
379 /* Initialise udp header */
380 payload->udp.source = 0;
381 payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) -
382 sizeof(struct iphdr));
383 payload->udp.check = 0; /* checksum ignored */
384
385 /* Fill out payload */
386 payload->iteration = htons(ntohs(payload->iteration) + 1);
387 memcpy(&payload->msg, payload_msg, sizeof(payload_msg));
388
389 /* Fill out remaining state members */
390 atomic_set(&state->rx_good, 0);
391 atomic_set(&state->rx_bad, 0);
392 smp_wmb();
393 }
394
395 static int efx_begin_loopback(struct efx_tx_queue *tx_queue)
396 {
397 struct efx_nic *efx = tx_queue->efx;
398 struct efx_loopback_state *state = efx->loopback_selftest;
399 struct efx_loopback_payload *payload;
400 struct sk_buff *skb;
401 int i, rc;
402
403 /* Transmit N copies of buffer */
404 for (i = 0; i < state->packet_count; i++) {
405 /* Allocate an skb, holding an extra reference for
406 * transmit completion counting */
407 skb = alloc_skb(sizeof(state->payload), GFP_KERNEL);
408 if (!skb)
409 return -ENOMEM;
410 state->skbs[i] = skb;
411 skb_get(skb);
412
413 /* Copy the payload in, incrementing the source address to
414 * exercise the rss vectors */
415 payload = ((struct efx_loopback_payload *)
416 skb_put(skb, sizeof(state->payload)));
417 memcpy(payload, &state->payload, sizeof(state->payload));
418 payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2));
419
420 /* Ensure everything we've written is visible to the
421 * interrupt handler. */
422 smp_wmb();
423
424 if (efx_dev_registered(efx))
425 netif_tx_lock_bh(efx->net_dev);
426 rc = efx_xmit(efx, tx_queue, skb);
427 if (efx_dev_registered(efx))
428 netif_tx_unlock_bh(efx->net_dev);
429
430 if (rc != NETDEV_TX_OK) {
431 EFX_ERR(efx, "TX queue %d could not transmit packet %d "
432 "of %d in %s loopback test\n", tx_queue->queue,
433 i + 1, state->packet_count, LOOPBACK_MODE(efx));
434
435 /* Defer cleaning up the other skbs for the caller */
436 kfree_skb(skb);
437 return -EPIPE;
438 }
439 }
440
441 return 0;
442 }
443
444 static int efx_poll_loopback(struct efx_nic *efx)
445 {
446 struct efx_loopback_state *state = efx->loopback_selftest;
447 struct efx_channel *channel;
448
449 /* NAPI polling is not enabled, so process channels
450 * synchronously */
451 efx_for_each_channel(channel, efx) {
452 if (channel->work_pending)
453 efx_process_channel_now(channel);
454 }
455 return atomic_read(&state->rx_good) == state->packet_count;
456 }
457
458 static int efx_end_loopback(struct efx_tx_queue *tx_queue,
459 struct efx_loopback_self_tests *lb_tests)
460 {
461 struct efx_nic *efx = tx_queue->efx;
462 struct efx_loopback_state *state = efx->loopback_selftest;
463 struct sk_buff *skb;
464 int tx_done = 0, rx_good, rx_bad;
465 int i, rc = 0;
466
467 if (efx_dev_registered(efx))
468 netif_tx_lock_bh(efx->net_dev);
469
470 /* Count the number of tx completions, and decrement the refcnt. Any
471 * skbs not already completed will be free'd when the queue is flushed */
472 for (i=0; i < state->packet_count; i++) {
473 skb = state->skbs[i];
474 if (skb && !skb_shared(skb))
475 ++tx_done;
476 dev_kfree_skb_any(skb);
477 }
478
479 if (efx_dev_registered(efx))
480 netif_tx_unlock_bh(efx->net_dev);
481
482 /* Check TX completion and received packet counts */
483 rx_good = atomic_read(&state->rx_good);
484 rx_bad = atomic_read(&state->rx_bad);
485 if (tx_done != state->packet_count) {
486 /* Don't free the skbs; they will be picked up on TX
487 * overflow or channel teardown.
488 */
489 EFX_ERR(efx, "TX queue %d saw only %d out of an expected %d "
490 "TX completion events in %s loopback test\n",
491 tx_queue->queue, tx_done, state->packet_count,
492 LOOPBACK_MODE(efx));
493 rc = -ETIMEDOUT;
494 /* Allow to fall through so we see the RX errors as well */
495 }
496
497 /* We may always be up to a flush away from our desired packet total */
498 if (rx_good != state->packet_count) {
499 EFX_LOG(efx, "TX queue %d saw only %d out of an expected %d "
500 "received packets in %s loopback test\n",
501 tx_queue->queue, rx_good, state->packet_count,
502 LOOPBACK_MODE(efx));
503 rc = -ETIMEDOUT;
504 /* Fall through */
505 }
506
507 /* Update loopback test structure */
508 lb_tests->tx_sent[tx_queue->queue] += state->packet_count;
509 lb_tests->tx_done[tx_queue->queue] += tx_done;
510 lb_tests->rx_good += rx_good;
511 lb_tests->rx_bad += rx_bad;
512
513 return rc;
514 }
515
516 static int
517 efx_test_loopback(struct efx_tx_queue *tx_queue,
518 struct efx_loopback_self_tests *lb_tests)
519 {
520 struct efx_nic *efx = tx_queue->efx;
521 struct efx_loopback_state *state = efx->loopback_selftest;
522 int i, begin_rc, end_rc;
523
524 for (i = 0; i < 3; i++) {
525 /* Determine how many packets to send */
526 state->packet_count = (efx->type->txd_ring_mask + 1) / 3;
527 state->packet_count = min(1 << (i << 2), state->packet_count);
528 state->skbs = kzalloc(sizeof(state->skbs[0]) *
529 state->packet_count, GFP_KERNEL);
530 if (!state->skbs)
531 return -ENOMEM;
532 state->flush = false;
533
534 EFX_LOG(efx, "TX queue %d testing %s loopback with %d "
535 "packets\n", tx_queue->queue, LOOPBACK_MODE(efx),
536 state->packet_count);
537
538 efx_iterate_state(efx);
539 begin_rc = efx_begin_loopback(tx_queue);
540
541 /* This will normally complete very quickly, but be
542 * prepared to wait up to 100 ms. */
543 msleep(1);
544 if (!efx_poll_loopback(efx)) {
545 msleep(100);
546 efx_poll_loopback(efx);
547 }
548
549 end_rc = efx_end_loopback(tx_queue, lb_tests);
550 kfree(state->skbs);
551
552 if (begin_rc || end_rc) {
553 /* Wait a while to ensure there are no packets
554 * floating around after a failure. */
555 schedule_timeout_uninterruptible(HZ / 10);
556 return begin_rc ? begin_rc : end_rc;
557 }
558 }
559
560 EFX_LOG(efx, "TX queue %d passed %s loopback test with a burst length "
561 "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx),
562 state->packet_count);
563
564 return 0;
565 }
566
567 static int efx_test_loopbacks(struct efx_nic *efx, struct ethtool_cmd ecmd,
568 struct efx_self_tests *tests,
569 unsigned int loopback_modes)
570 {
571 enum efx_loopback_mode mode;
572 struct efx_loopback_state *state;
573 struct efx_tx_queue *tx_queue;
574 bool link_up;
575 int count, rc = 0;
576
577 /* Set the port loopback_selftest member. From this point on
578 * all received packets will be dropped. Mark the state as
579 * "flushing" so all inflight packets are dropped */
580 state = kzalloc(sizeof(*state), GFP_KERNEL);
581 if (state == NULL)
582 return -ENOMEM;
583 BUG_ON(efx->loopback_selftest);
584 state->flush = true;
585 efx->loopback_selftest = state;
586
587 /* Test all supported loopback modes */
588 for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) {
589 if (!(loopback_modes & (1 << mode)))
590 continue;
591
592 /* Move the port into the specified loopback mode. */
593 state->flush = true;
594 efx->loopback_mode = mode;
595 efx_reconfigure_port(efx);
596
597 /* Wait for the PHY to signal the link is up */
598 count = 0;
599 do {
600 struct efx_channel *channel = &efx->channel[0];
601
602 efx->mac_op->check_hw(efx);
603 schedule_timeout_uninterruptible(HZ / 10);
604 if (channel->work_pending)
605 efx_process_channel_now(channel);
606 /* Wait for PHY events to be processed */
607 flush_workqueue(efx->workqueue);
608 rmb();
609
610 /* We need both the phy and xaui links to be ok.
611 * rather than relying on the falcon_xmac irq/poll
612 * regime, just poll xaui directly */
613 link_up = efx->link_up;
614 if (link_up && EFX_IS10G(efx) &&
615 !falcon_xaui_link_ok(efx))
616 link_up = false;
617
618 } while ((++count < 20) && !link_up);
619
620 /* The link should now be up. If it isn't, there is no point
621 * in attempting a loopback test */
622 if (!link_up) {
623 EFX_ERR(efx, "loopback %s never came up\n",
624 LOOPBACK_MODE(efx));
625 rc = -EIO;
626 goto out;
627 }
628
629 EFX_LOG(efx, "link came up in %s loopback in %d iterations\n",
630 LOOPBACK_MODE(efx), count);
631
632 /* Test every TX queue */
633 efx_for_each_tx_queue(tx_queue, efx) {
634 state->offload_csum = (tx_queue->queue ==
635 EFX_TX_QUEUE_OFFLOAD_CSUM);
636 rc = efx_test_loopback(tx_queue,
637 &tests->loopback[mode]);
638 if (rc)
639 goto out;
640 }
641 }
642
643 out:
644 /* Remove the flush. The caller will remove the loopback setting */
645 state->flush = true;
646 efx->loopback_selftest = NULL;
647 wmb();
648 kfree(state);
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, rc2 = 0;
665
666 rc = efx_test_mii(efx, tests);
667 if (rc && !rc2)
668 rc2 = rc;
669
670 rc = efx_test_nvram(efx, tests);
671 if (rc && !rc2)
672 rc2 = rc;
673
674 rc = efx_test_interrupts(efx, tests);
675 if (rc && !rc2)
676 rc2 = rc;
677
678 efx_for_each_channel(channel, efx) {
679 rc = efx_test_eventq_irq(channel, tests);
680 if (rc && !rc2)
681 rc2 = rc;
682 }
683
684 return rc2;
685 }
686
687 /* Offline (i.e. disruptive) testing
688 * This checks MAC and PHY loopback on the specified port. */
689 int efx_offline_test(struct efx_nic *efx,
690 struct efx_self_tests *tests, unsigned int loopback_modes)
691 {
692 enum efx_loopback_mode loopback_mode = efx->loopback_mode;
693 int phy_mode = efx->phy_mode;
694 struct ethtool_cmd ecmd, ecmd_test;
695 int rc, rc2 = 0;
696
697 /* force the carrier state off so the kernel doesn't transmit during
698 * the loopback test, and the watchdog timeout doesn't fire. Also put
699 * falcon into loopback for the register test.
700 */
701 mutex_lock(&efx->mac_lock);
702 efx->port_inhibited = true;
703 if (efx->loopback_modes)
704 efx->loopback_mode = __ffs(efx->loopback_modes);
705 __efx_reconfigure_port(efx);
706 mutex_unlock(&efx->mac_lock);
707
708 /* free up all consumers of SRAM (including all the queues) */
709 efx_reset_down(efx, &ecmd);
710
711 rc = efx_test_chip(efx, tests);
712 if (rc && !rc2)
713 rc2 = rc;
714
715 /* reset the chip to recover from the register test */
716 rc = falcon_reset_hw(efx, RESET_TYPE_ALL);
717
718 /* Modify the saved ecmd so that when efx_reset_up() restores the phy
719 * state, AN is disabled, and the phy is powered, and out of loopback */
720 memcpy(&ecmd_test, &ecmd, sizeof(ecmd_test));
721 if (ecmd_test.autoneg == AUTONEG_ENABLE) {
722 ecmd_test.autoneg = AUTONEG_DISABLE;
723 ecmd_test.duplex = DUPLEX_FULL;
724 }
725 efx->loopback_mode = LOOPBACK_NONE;
726
727 rc = efx_reset_up(efx, &ecmd_test, rc == 0);
728 if (rc) {
729 EFX_ERR(efx, "Unable to recover from chip test\n");
730 efx_schedule_reset(efx, RESET_TYPE_DISABLE);
731 return rc;
732 }
733
734 rc = efx_test_phy(efx, tests);
735 if (rc && !rc2)
736 rc2 = rc;
737
738 rc = efx_test_loopbacks(efx, ecmd_test, tests, loopback_modes);
739 if (rc && !rc2)
740 rc2 = rc;
741
742 /* restore the PHY to the previous state */
743 efx->loopback_mode = loopback_mode;
744 efx->phy_mode = phy_mode;
745 efx->port_inhibited = false;
746 efx_ethtool_set_settings(efx->net_dev, &ecmd);
747
748 return rc2;
749 }
750
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