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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 <asm/io.h>
23#include "net_driver.h"
24#include "efx.h"
25#include "nic.h"
26#include "selftest.h"
27#include "workarounds.h"
28
29/*
30 * Loopback test packet structure
31 *
32 * The self-test should stress every RSS vector, and unfortunately
33 * Falcon only performs RSS on TCP/UDP packets.
34 */
35struct efx_loopback_payload {
36 struct ethhdr header;
37 struct iphdr ip;
38 struct udphdr udp;
39 __be16 iteration;
40 const char msg[64];
41} __packed;
42
43/* Loopback test source MAC address */
44static const unsigned char payload_source[ETH_ALEN] = {
45 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b,
46};
47
48static const char payload_msg[] =
49 "Hello world! This is an Efx loopback test in progress!";
50
51/* Interrupt mode names */
52static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX;
53static const char *efx_interrupt_mode_names[] = {
54 [EFX_INT_MODE_MSIX] = "MSI-X",
55 [EFX_INT_MODE_MSI] = "MSI",
56 [EFX_INT_MODE_LEGACY] = "legacy",
57};
58#define INT_MODE(efx) \
59 STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode)
60
61/**
62 * efx_loopback_state - persistent state during a loopback selftest
63 * @flush: Drop all packets in efx_loopback_rx_packet
64 * @packet_count: Number of packets being used in this test
65 * @skbs: An array of skbs transmitted
66 * @offload_csum: Checksums are being offloaded
67 * @rx_good: RX good packet count
68 * @rx_bad: RX bad packet count
69 * @payload: Payload used in tests
70 */
71struct efx_loopback_state {
72 bool flush;
73 int packet_count;
74 struct sk_buff **skbs;
75 bool offload_csum;
76 atomic_t rx_good;
77 atomic_t rx_bad;
78 struct efx_loopback_payload payload;
79};
80
81/**************************************************************************
82 *
83 * MII, NVRAM and register tests
84 *
85 **************************************************************************/
86
87static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests)
88{
89 int rc = 0;
90
91 if (efx->phy_op->test_alive) {
92 rc = efx->phy_op->test_alive(efx);
93 tests->phy_alive = rc ? -1 : 1;
94 }
95
96 return rc;
97}
98
99static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests)
100{
101 int rc = 0;
102
103 if (efx->type->test_nvram) {
104 rc = efx->type->test_nvram(efx);
105 tests->nvram = rc ? -1 : 1;
106 }
107
108 return rc;
109}
110
111static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests)
112{
113 int rc = 0;
114
115 /* Test register access */
116 if (efx->type->test_registers) {
117 rc = efx->type->test_registers(efx);
118 tests->registers = rc ? -1 : 1;
119 }
120
121 return rc;
122}
123
124/**************************************************************************
125 *
126 * Interrupt and event queue testing
127 *
128 **************************************************************************/
129
130/* Test generation and receipt of interrupts */
131static int efx_test_interrupts(struct efx_nic *efx,
132 struct efx_self_tests *tests)
133{
134 netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n");
135 tests->interrupt = -1;
136
137 /* Reset interrupt flag */
138 efx->last_irq_cpu = -1;
139 smp_wmb();
140
141 efx_nic_generate_interrupt(efx);
142
143 /* Wait for arrival of test interrupt. */
144 netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n");
145 schedule_timeout_uninterruptible(HZ / 10);
146 if (efx->last_irq_cpu >= 0)
147 goto success;
148
149 netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n");
150 return -ETIMEDOUT;
151
152 success:
153 netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n",
154 INT_MODE(efx),
155 efx->last_irq_cpu);
156 tests->interrupt = 1;
157 return 0;
158}
159
160/* Test generation and receipt of interrupting events */
161static int efx_test_eventq_irq(struct efx_channel *channel,
162 struct efx_self_tests *tests)
163{
164 struct efx_nic *efx = channel->efx;
165 unsigned int read_ptr, count;
166
167 tests->eventq_dma[channel->channel] = -1;
168 tests->eventq_int[channel->channel] = -1;
169 tests->eventq_poll[channel->channel] = -1;
170
171 read_ptr = channel->eventq_read_ptr;
172 channel->efx->last_irq_cpu = -1;
173 smp_wmb();
174
175 efx_nic_generate_test_event(channel);
176
177 /* Wait for arrival of interrupt */
178 count = 0;
179 do {
180 schedule_timeout_uninterruptible(HZ / 100);
181
182 if (ACCESS_ONCE(channel->eventq_read_ptr) != read_ptr)
183 goto eventq_ok;
184 } while (++count < 2);
185
186 netif_err(efx, drv, efx->net_dev,
187 "channel %d timed out waiting for event queue\n",
188 channel->channel);
189
190 /* See if interrupt arrived */
191 if (channel->efx->last_irq_cpu >= 0) {
192 netif_err(efx, drv, efx->net_dev,
193 "channel %d saw interrupt on CPU%d "
194 "during event queue test\n", channel->channel,
195 raw_smp_processor_id());
196 tests->eventq_int[channel->channel] = 1;
197 }
198
199 /* Check to see if event was received even if interrupt wasn't */
200 if (efx_nic_event_present(channel)) {
201 netif_err(efx, drv, efx->net_dev,
202 "channel %d event was generated, but "
203 "failed to trigger an interrupt\n", channel->channel);
204 tests->eventq_dma[channel->channel] = 1;
205 }
206
207 return -ETIMEDOUT;
208 eventq_ok:
209 netif_dbg(efx, drv, efx->net_dev, "channel %d event queue passed\n",
210 channel->channel);
211 tests->eventq_dma[channel->channel] = 1;
212 tests->eventq_int[channel->channel] = 1;
213 tests->eventq_poll[channel->channel] = 1;
214 return 0;
215}
216
217static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests,
218 unsigned flags)
219{
220 int rc;
221
222 if (!efx->phy_op->run_tests)
223 return 0;
224
225 mutex_lock(&efx->mac_lock);
226 rc = efx->phy_op->run_tests(efx, tests->phy_ext, flags);
227 mutex_unlock(&efx->mac_lock);
228 return rc;
229}
230
231/**************************************************************************
232 *
233 * Loopback testing
234 * NB Only one loopback test can be executing concurrently.
235 *
236 **************************************************************************/
237
238/* Loopback test RX callback
239 * This is called for each received packet during loopback testing.
240 */
241void efx_loopback_rx_packet(struct efx_nic *efx,
242 const char *buf_ptr, int pkt_len)
243{
244 struct efx_loopback_state *state = efx->loopback_selftest;
245 struct efx_loopback_payload *received;
246 struct efx_loopback_payload *payload;
247
248 BUG_ON(!buf_ptr);
249
250 /* If we are just flushing, then drop the packet */
251 if ((state == NULL) || state->flush)
252 return;
253
254 payload = &state->payload;
255
256 received = (struct efx_loopback_payload *) buf_ptr;
257 received->ip.saddr = payload->ip.saddr;
258 if (state->offload_csum)
259 received->ip.check = payload->ip.check;
260
261 /* Check that header exists */
262 if (pkt_len < sizeof(received->header)) {
263 netif_err(efx, drv, efx->net_dev,
264 "saw runt RX packet (length %d) in %s loopback "
265 "test\n", pkt_len, LOOPBACK_MODE(efx));
266 goto err;
267 }
268
269 /* Check that the ethernet header exists */
270 if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) {
271 netif_err(efx, drv, efx->net_dev,
272 "saw non-loopback RX packet in %s loopback test\n",
273 LOOPBACK_MODE(efx));
274 goto err;
275 }
276
277 /* Check packet length */
278 if (pkt_len != sizeof(*payload)) {
279 netif_err(efx, drv, efx->net_dev,
280 "saw incorrect RX packet length %d (wanted %d) in "
281 "%s loopback test\n", pkt_len, (int)sizeof(*payload),
282 LOOPBACK_MODE(efx));
283 goto err;
284 }
285
286 /* Check that IP header matches */
287 if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) {
288 netif_err(efx, drv, efx->net_dev,
289 "saw corrupted IP header in %s loopback test\n",
290 LOOPBACK_MODE(efx));
291 goto err;
292 }
293
294 /* Check that msg and padding matches */
295 if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) {
296 netif_err(efx, drv, efx->net_dev,
297 "saw corrupted RX packet in %s loopback test\n",
298 LOOPBACK_MODE(efx));
299 goto err;
300 }
301
302 /* Check that iteration matches */
303 if (received->iteration != payload->iteration) {
304 netif_err(efx, drv, efx->net_dev,
305 "saw RX packet from iteration %d (wanted %d) in "
306 "%s loopback test\n", ntohs(received->iteration),
307 ntohs(payload->iteration), LOOPBACK_MODE(efx));
308 goto err;
309 }
310
311 /* Increase correct RX count */
312 netif_vdbg(efx, drv, efx->net_dev,
313 "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx));
314
315 atomic_inc(&state->rx_good);
316 return;
317
318 err:
319#ifdef EFX_ENABLE_DEBUG
320 if (atomic_read(&state->rx_bad) == 0) {
321 netif_err(efx, drv, efx->net_dev, "received packet:\n");
322 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
323 buf_ptr, pkt_len, 0);
324 netif_err(efx, drv, efx->net_dev, "expected packet:\n");
325 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
326 &state->payload, sizeof(state->payload), 0);
327 }
328#endif
329 atomic_inc(&state->rx_bad);
330}
331
332/* Initialise an efx_selftest_state for a new iteration */
333static void efx_iterate_state(struct efx_nic *efx)
334{
335 struct efx_loopback_state *state = efx->loopback_selftest;
336 struct net_device *net_dev = efx->net_dev;
337 struct efx_loopback_payload *payload = &state->payload;
338
339 /* Initialise the layerII header */
340 memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN);
341 memcpy(&payload->header.h_source, &payload_source, ETH_ALEN);
342 payload->header.h_proto = htons(ETH_P_IP);
343
344 /* saddr set later and used as incrementing count */
345 payload->ip.daddr = htonl(INADDR_LOOPBACK);
346 payload->ip.ihl = 5;
347 payload->ip.check = htons(0xdead);
348 payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr));
349 payload->ip.version = IPVERSION;
350 payload->ip.protocol = IPPROTO_UDP;
351
352 /* Initialise udp header */
353 payload->udp.source = 0;
354 payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) -
355 sizeof(struct iphdr));
356 payload->udp.check = 0; /* checksum ignored */
357
358 /* Fill out payload */
359 payload->iteration = htons(ntohs(payload->iteration) + 1);
360 memcpy(&payload->msg, payload_msg, sizeof(payload_msg));
361
362 /* Fill out remaining state members */
363 atomic_set(&state->rx_good, 0);
364 atomic_set(&state->rx_bad, 0);
365 smp_wmb();
366}
367
368static int efx_begin_loopback(struct efx_tx_queue *tx_queue)
369{
370 struct efx_nic *efx = tx_queue->efx;
371 struct efx_loopback_state *state = efx->loopback_selftest;
372 struct efx_loopback_payload *payload;
373 struct sk_buff *skb;
374 int i;
375 netdev_tx_t rc;
376
377 /* Transmit N copies of buffer */
378 for (i = 0; i < state->packet_count; i++) {
379 /* Allocate an skb, holding an extra reference for
380 * transmit completion counting */
381 skb = alloc_skb(sizeof(state->payload), GFP_KERNEL);
382 if (!skb)
383 return -ENOMEM;
384 state->skbs[i] = skb;
385 skb_get(skb);
386
387 /* Copy the payload in, incrementing the source address to
388 * exercise the rss vectors */
389 payload = ((struct efx_loopback_payload *)
390 skb_put(skb, sizeof(state->payload)));
391 memcpy(payload, &state->payload, sizeof(state->payload));
392 payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2));
393
394 /* Ensure everything we've written is visible to the
395 * interrupt handler. */
396 smp_wmb();
397
398 if (efx_dev_registered(efx))
399 netif_tx_lock_bh(efx->net_dev);
400 rc = efx_enqueue_skb(tx_queue, skb);
401 if (efx_dev_registered(efx))
402 netif_tx_unlock_bh(efx->net_dev);
403
404 if (rc != NETDEV_TX_OK) {
405 netif_err(efx, drv, efx->net_dev,
406 "TX queue %d could not transmit packet %d of "
407 "%d in %s loopback test\n", tx_queue->queue,
408 i + 1, state->packet_count,
409 LOOPBACK_MODE(efx));
410
411 /* Defer cleaning up the other skbs for the caller */
412 kfree_skb(skb);
413 return -EPIPE;
414 }
415 }
416
417 return 0;
418}
419
420static int efx_poll_loopback(struct efx_nic *efx)
421{
422 struct efx_loopback_state *state = efx->loopback_selftest;
423 struct efx_channel *channel;
424
425 /* NAPI polling is not enabled, so process channels
426 * synchronously */
427 efx_for_each_channel(channel, efx) {
428 if (channel->work_pending)
429 efx_process_channel_now(channel);
430 }
431 return atomic_read(&state->rx_good) == state->packet_count;
432}
433
434static int efx_end_loopback(struct efx_tx_queue *tx_queue,
435 struct efx_loopback_self_tests *lb_tests)
436{
437 struct efx_nic *efx = tx_queue->efx;
438 struct efx_loopback_state *state = efx->loopback_selftest;
439 struct sk_buff *skb;
440 int tx_done = 0, rx_good, rx_bad;
441 int i, rc = 0;
442
443 if (efx_dev_registered(efx))
444 netif_tx_lock_bh(efx->net_dev);
445
446 /* Count the number of tx completions, and decrement the refcnt. Any
447 * skbs not already completed will be free'd when the queue is flushed */
448 for (i=0; i < state->packet_count; i++) {
449 skb = state->skbs[i];
450 if (skb && !skb_shared(skb))
451 ++tx_done;
452 dev_kfree_skb_any(skb);
453 }
454
455 if (efx_dev_registered(efx))
456 netif_tx_unlock_bh(efx->net_dev);
457
458 /* Check TX completion and received packet counts */
459 rx_good = atomic_read(&state->rx_good);
460 rx_bad = atomic_read(&state->rx_bad);
461 if (tx_done != state->packet_count) {
462 /* Don't free the skbs; they will be picked up on TX
463 * overflow or channel teardown.
464 */
465 netif_err(efx, drv, efx->net_dev,
466 "TX queue %d saw only %d out of an expected %d "
467 "TX completion events in %s loopback test\n",
468 tx_queue->queue, tx_done, state->packet_count,
469 LOOPBACK_MODE(efx));
470 rc = -ETIMEDOUT;
471 /* Allow to fall through so we see the RX errors as well */
472 }
473
474 /* We may always be up to a flush away from our desired packet total */
475 if (rx_good != state->packet_count) {
476 netif_dbg(efx, drv, efx->net_dev,
477 "TX queue %d saw only %d out of an expected %d "
478 "received packets in %s loopback test\n",
479 tx_queue->queue, rx_good, state->packet_count,
480 LOOPBACK_MODE(efx));
481 rc = -ETIMEDOUT;
482 /* Fall through */
483 }
484
485 /* Update loopback test structure */
486 lb_tests->tx_sent[tx_queue->queue] += state->packet_count;
487 lb_tests->tx_done[tx_queue->queue] += tx_done;
488 lb_tests->rx_good += rx_good;
489 lb_tests->rx_bad += rx_bad;
490
491 return rc;
492}
493
494static int
495efx_test_loopback(struct efx_tx_queue *tx_queue,
496 struct efx_loopback_self_tests *lb_tests)
497{
498 struct efx_nic *efx = tx_queue->efx;
499 struct efx_loopback_state *state = efx->loopback_selftest;
500 int i, begin_rc, end_rc;
501
502 for (i = 0; i < 3; i++) {
503 /* Determine how many packets to send */
504 state->packet_count = efx->txq_entries / 3;
505 state->packet_count = min(1 << (i << 2), state->packet_count);
506 state->skbs = kzalloc(sizeof(state->skbs[0]) *
507 state->packet_count, GFP_KERNEL);
508 if (!state->skbs)
509 return -ENOMEM;
510 state->flush = false;
511
512 netif_dbg(efx, drv, efx->net_dev,
513 "TX queue %d testing %s loopback with %d packets\n",
514 tx_queue->queue, LOOPBACK_MODE(efx),
515 state->packet_count);
516
517 efx_iterate_state(efx);
518 begin_rc = efx_begin_loopback(tx_queue);
519
520 /* This will normally complete very quickly, but be
521 * prepared to wait up to 100 ms. */
522 msleep(1);
523 if (!efx_poll_loopback(efx)) {
524 msleep(100);
525 efx_poll_loopback(efx);
526 }
527
528 end_rc = efx_end_loopback(tx_queue, lb_tests);
529 kfree(state->skbs);
530
531 if (begin_rc || end_rc) {
532 /* Wait a while to ensure there are no packets
533 * floating around after a failure. */
534 schedule_timeout_uninterruptible(HZ / 10);
535 return begin_rc ? begin_rc : end_rc;
536 }
537 }
538
539 netif_dbg(efx, drv, efx->net_dev,
540 "TX queue %d passed %s loopback test with a burst length "
541 "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx),
542 state->packet_count);
543
544 return 0;
545}
546
547/* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but
548 * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it
549 * to delay and retry. Therefore, it's safer to just poll directly. Wait
550 * for link up and any faults to dissipate. */
551static int efx_wait_for_link(struct efx_nic *efx)
552{
553 struct efx_link_state *link_state = &efx->link_state;
554 int count, link_up_count = 0;
555 bool link_up;
556
557 for (count = 0; count < 40; count++) {
558 schedule_timeout_uninterruptible(HZ / 10);
559
560 if (efx->type->monitor != NULL) {
561 mutex_lock(&efx->mac_lock);
562 efx->type->monitor(efx);
563 mutex_unlock(&efx->mac_lock);
564 } else {
565 struct efx_channel *channel = efx_get_channel(efx, 0);
566 if (channel->work_pending)
567 efx_process_channel_now(channel);
568 }
569
570 mutex_lock(&efx->mac_lock);
571 link_up = link_state->up;
572 if (link_up)
573 link_up = !efx->mac_op->check_fault(efx);
574 mutex_unlock(&efx->mac_lock);
575
576 if (link_up) {
577 if (++link_up_count == 2)
578 return 0;
579 } else {
580 link_up_count = 0;
581 }
582 }
583
584 return -ETIMEDOUT;
585}
586
587static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests,
588 unsigned int loopback_modes)
589{
590 enum efx_loopback_mode mode;
591 struct efx_loopback_state *state;
592 struct efx_channel *channel = efx_get_channel(efx, 0);
593 struct efx_tx_queue *tx_queue;
594 int rc = 0;
595
596 /* Set the port loopback_selftest member. From this point on
597 * all received packets will be dropped. Mark the state as
598 * "flushing" so all inflight packets are dropped */
599 state = kzalloc(sizeof(*state), GFP_KERNEL);
600 if (state == NULL)
601 return -ENOMEM;
602 BUG_ON(efx->loopback_selftest);
603 state->flush = true;
604 efx->loopback_selftest = state;
605
606 /* Test all supported loopback modes */
607 for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) {
608 if (!(loopback_modes & (1 << mode)))
609 continue;
610
611 /* Move the port into the specified loopback mode. */
612 state->flush = true;
613 mutex_lock(&efx->mac_lock);
614 efx->loopback_mode = mode;
615 rc = __efx_reconfigure_port(efx);
616 mutex_unlock(&efx->mac_lock);
617 if (rc) {
618 netif_err(efx, drv, efx->net_dev,
619 "unable to move into %s loopback\n",
620 LOOPBACK_MODE(efx));
621 goto out;
622 }
623
624 rc = efx_wait_for_link(efx);
625 if (rc) {
626 netif_err(efx, drv, efx->net_dev,
627 "loopback %s never came up\n",
628 LOOPBACK_MODE(efx));
629 goto out;
630 }
631
632 /* Test all enabled types of TX queue */
633 efx_for_each_channel_tx_queue(tx_queue, channel) {
634 state->offload_csum = (tx_queue->queue &
635 EFX_TXQ_TYPE_OFFLOAD);
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 point
656 *
657 *************************************************************************/
658
659int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests,
660 unsigned flags)
661{
662 enum efx_loopback_mode loopback_mode = efx->loopback_mode;
663 int phy_mode = efx->phy_mode;
664 enum reset_type reset_method = RESET_TYPE_INVISIBLE;
665 struct efx_channel *channel;
666 int rc_test = 0, rc_reset = 0, rc;
667
668 /* Online (i.e. non-disruptive) testing
669 * This checks interrupt generation, event delivery and PHY presence. */
670
671 rc = efx_test_phy_alive(efx, tests);
672 if (rc && !rc_test)
673 rc_test = rc;
674
675 rc = efx_test_nvram(efx, tests);
676 if (rc && !rc_test)
677 rc_test = rc;
678
679 rc = efx_test_interrupts(efx, tests);
680 if (rc && !rc_test)
681 rc_test = rc;
682
683 efx_for_each_channel(channel, efx) {
684 rc = efx_test_eventq_irq(channel, tests);
685 if (rc && !rc_test)
686 rc_test = rc;
687 }
688
689 if (rc_test)
690 return rc_test;
691
692 if (!(flags & ETH_TEST_FL_OFFLINE))
693 return efx_test_phy(efx, tests, flags);
694
695 /* Offline (i.e. disruptive) testing
696 * This checks MAC and PHY loopback on the specified port. */
697
698 /* Detach the device so the kernel doesn't transmit during the
699 * loopback test and the watchdog timeout doesn't fire.
700 */
701 netif_device_detach(efx->net_dev);
702
703 mutex_lock(&efx->mac_lock);
704 if (efx->loopback_modes) {
705 /* We need the 312 clock from the PHY to test the XMAC
706 * registers, so move into XGMII loopback if available */
707 if (efx->loopback_modes & (1 << LOOPBACK_XGMII))
708 efx->loopback_mode = LOOPBACK_XGMII;
709 else
710 efx->loopback_mode = __ffs(efx->loopback_modes);
711 }
712
713 __efx_reconfigure_port(efx);
714 mutex_unlock(&efx->mac_lock);
715
716 /* free up all consumers of SRAM (including all the queues) */
717 efx_reset_down(efx, reset_method);
718
719 rc = efx_test_chip(efx, tests);
720 if (rc && !rc_test)
721 rc_test = rc;
722
723 /* reset the chip to recover from the register test */
724 rc_reset = efx->type->reset(efx, reset_method);
725
726 /* Ensure that the phy is powered and out of loopback
727 * for the bist and loopback tests */
728 efx->phy_mode &= ~PHY_MODE_LOW_POWER;
729 efx->loopback_mode = LOOPBACK_NONE;
730
731 rc = efx_reset_up(efx, reset_method, rc_reset == 0);
732 if (rc && !rc_reset)
733 rc_reset = rc;
734
735 if (rc_reset) {
736 netif_err(efx, drv, efx->net_dev,
737 "Unable to recover from chip test\n");
738 efx_schedule_reset(efx, RESET_TYPE_DISABLE);
739 return rc_reset;
740 }
741
742 rc = efx_test_phy(efx, tests, flags);
743 if (rc && !rc_test)
744 rc_test = rc;
745
746 rc = efx_test_loopbacks(efx, tests, efx->loopback_modes);
747 if (rc && !rc_test)
748 rc_test = rc;
749
750 /* restore the PHY to the previous state */
751 mutex_lock(&efx->mac_lock);
752 efx->phy_mode = phy_mode;
753 efx->loopback_mode = loopback_mode;
754 __efx_reconfigure_port(efx);
755 mutex_unlock(&efx->mac_lock);
756
757 netif_device_attach(efx->net_dev);
758
759 return rc_test;
760}
761