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3273c2e8 BH |
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; | |
60ac1065 BH |
66 | |
67 | /* Checksums are being offloaded */ | |
68 | int offload_csum; | |
69 | ||
3273c2e8 BH |
70 | atomic_t rx_good; |
71 | atomic_t rx_bad; | |
72 | struct efx_loopback_payload payload; | |
73 | }; | |
74 | ||
75 | /************************************************************************** | |
76 | * | |
77 | * Configurable values | |
78 | * | |
79 | **************************************************************************/ | |
80 | ||
81 | /* Level of loopback testing | |
82 | * | |
83 | * The maximum packet burst length is 16**(n-1), i.e. | |
84 | * | |
85 | * - Level 0 : no packets | |
86 | * - Level 1 : 1 packet | |
87 | * - Level 2 : 17 packets (1 * 1 packet, 1 * 16 packets) | |
88 | * - Level 3 : 273 packets (1 * 1 packet, 1 * 16 packet, 1 * 256 packets) | |
89 | * | |
90 | */ | |
91 | static unsigned int loopback_test_level = 3; | |
92 | ||
93 | /************************************************************************** | |
94 | * | |
95 | * Interrupt and event queue testing | |
96 | * | |
97 | **************************************************************************/ | |
98 | ||
99 | /* Test generation and receipt of interrupts */ | |
100 | static int efx_test_interrupts(struct efx_nic *efx, | |
101 | struct efx_self_tests *tests) | |
102 | { | |
103 | struct efx_channel *channel; | |
104 | ||
105 | EFX_LOG(efx, "testing interrupts\n"); | |
106 | tests->interrupt = -1; | |
107 | ||
108 | /* Reset interrupt flag */ | |
109 | efx->last_irq_cpu = -1; | |
110 | smp_wmb(); | |
111 | ||
112 | /* ACK each interrupting event queue. Receiving an interrupt due to | |
113 | * traffic before a test event is raised is considered a pass */ | |
114 | efx_for_each_channel_with_interrupt(channel, efx) { | |
115 | if (channel->work_pending) | |
116 | efx_process_channel_now(channel); | |
117 | if (efx->last_irq_cpu >= 0) | |
118 | goto success; | |
119 | } | |
120 | ||
121 | falcon_generate_interrupt(efx); | |
122 | ||
123 | /* Wait for arrival of test interrupt. */ | |
124 | EFX_LOG(efx, "waiting for test interrupt\n"); | |
125 | schedule_timeout_uninterruptible(HZ / 10); | |
126 | if (efx->last_irq_cpu >= 0) | |
127 | goto success; | |
128 | ||
129 | EFX_ERR(efx, "timed out waiting for interrupt\n"); | |
130 | return -ETIMEDOUT; | |
131 | ||
132 | success: | |
133 | EFX_LOG(efx, "test interrupt (mode %d) seen on CPU%d\n", | |
134 | efx->interrupt_mode, efx->last_irq_cpu); | |
135 | tests->interrupt = 1; | |
136 | return 0; | |
137 | } | |
138 | ||
139 | /* Test generation and receipt of non-interrupting events */ | |
140 | static int efx_test_eventq(struct efx_channel *channel, | |
141 | struct efx_self_tests *tests) | |
142 | { | |
143 | unsigned int magic; | |
144 | ||
145 | /* Channel specific code, limited to 20 bits */ | |
146 | magic = (0x00010150 + channel->channel); | |
147 | EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n", | |
148 | channel->channel, magic); | |
149 | ||
150 | tests->eventq_dma[channel->channel] = -1; | |
151 | tests->eventq_int[channel->channel] = 1; /* fake pass */ | |
152 | tests->eventq_poll[channel->channel] = 1; /* fake pass */ | |
153 | ||
154 | /* Reset flag and zero magic word */ | |
155 | channel->efx->last_irq_cpu = -1; | |
156 | channel->eventq_magic = 0; | |
157 | smp_wmb(); | |
158 | ||
159 | falcon_generate_test_event(channel, magic); | |
160 | udelay(1); | |
161 | ||
162 | efx_process_channel_now(channel); | |
163 | if (channel->eventq_magic != magic) { | |
164 | EFX_ERR(channel->efx, "channel %d failed to see test event\n", | |
165 | channel->channel); | |
166 | return -ETIMEDOUT; | |
167 | } else { | |
168 | tests->eventq_dma[channel->channel] = 1; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | /* Test generation and receipt of interrupting events */ | |
175 | static int efx_test_eventq_irq(struct efx_channel *channel, | |
176 | struct efx_self_tests *tests) | |
177 | { | |
178 | unsigned int magic, count; | |
179 | ||
180 | /* Channel specific code, limited to 20 bits */ | |
181 | magic = (0x00010150 + channel->channel); | |
182 | EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n", | |
183 | channel->channel, magic); | |
184 | ||
185 | tests->eventq_dma[channel->channel] = -1; | |
186 | tests->eventq_int[channel->channel] = -1; | |
187 | tests->eventq_poll[channel->channel] = -1; | |
188 | ||
189 | /* Reset flag and zero magic word */ | |
190 | channel->efx->last_irq_cpu = -1; | |
191 | channel->eventq_magic = 0; | |
192 | smp_wmb(); | |
193 | ||
194 | falcon_generate_test_event(channel, magic); | |
195 | ||
196 | /* Wait for arrival of interrupt */ | |
197 | count = 0; | |
198 | do { | |
199 | schedule_timeout_uninterruptible(HZ / 100); | |
200 | ||
201 | if (channel->work_pending) | |
202 | efx_process_channel_now(channel); | |
203 | ||
204 | if (channel->eventq_magic == magic) | |
205 | goto eventq_ok; | |
206 | } while (++count < 2); | |
207 | ||
208 | EFX_ERR(channel->efx, "channel %d timed out waiting for event queue\n", | |
209 | channel->channel); | |
210 | ||
211 | /* See if interrupt arrived */ | |
212 | if (channel->efx->last_irq_cpu >= 0) { | |
213 | EFX_ERR(channel->efx, "channel %d saw interrupt on CPU%d " | |
214 | "during event queue test\n", channel->channel, | |
215 | raw_smp_processor_id()); | |
216 | tests->eventq_int[channel->channel] = 1; | |
217 | } | |
218 | ||
219 | /* Check to see if event was received even if interrupt wasn't */ | |
220 | efx_process_channel_now(channel); | |
221 | if (channel->eventq_magic == magic) { | |
222 | EFX_ERR(channel->efx, "channel %d event was generated, but " | |
223 | "failed to trigger an interrupt\n", channel->channel); | |
224 | tests->eventq_dma[channel->channel] = 1; | |
225 | } | |
226 | ||
227 | return -ETIMEDOUT; | |
228 | eventq_ok: | |
229 | EFX_LOG(channel->efx, "channel %d event queue passed\n", | |
230 | channel->channel); | |
231 | tests->eventq_dma[channel->channel] = 1; | |
232 | tests->eventq_int[channel->channel] = 1; | |
233 | tests->eventq_poll[channel->channel] = 1; | |
234 | return 0; | |
235 | } | |
236 | ||
237 | /************************************************************************** | |
238 | * | |
239 | * PHY testing | |
240 | * | |
241 | **************************************************************************/ | |
242 | ||
243 | /* Check PHY presence by reading the PHY ID registers */ | |
244 | static int efx_test_phy(struct efx_nic *efx, | |
245 | struct efx_self_tests *tests) | |
246 | { | |
247 | u16 physid1, physid2; | |
248 | struct mii_if_info *mii = &efx->mii; | |
249 | struct net_device *net_dev = efx->net_dev; | |
250 | ||
251 | if (efx->phy_type == PHY_TYPE_NONE) | |
252 | return 0; | |
253 | ||
254 | EFX_LOG(efx, "testing PHY presence\n"); | |
255 | tests->phy_ok = -1; | |
256 | ||
257 | physid1 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID1); | |
258 | physid2 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID2); | |
259 | ||
260 | if ((physid1 != 0x0000) && (physid1 != 0xffff) && | |
261 | (physid2 != 0x0000) && (physid2 != 0xffff)) { | |
262 | EFX_LOG(efx, "found MII PHY %d ID 0x%x:%x\n", | |
263 | mii->phy_id, physid1, physid2); | |
264 | tests->phy_ok = 1; | |
265 | return 0; | |
266 | } | |
267 | ||
268 | EFX_ERR(efx, "no MII PHY present with ID %d\n", mii->phy_id); | |
269 | return -ENODEV; | |
270 | } | |
271 | ||
272 | /************************************************************************** | |
273 | * | |
274 | * Loopback testing | |
275 | * NB Only one loopback test can be executing concurrently. | |
276 | * | |
277 | **************************************************************************/ | |
278 | ||
279 | /* Loopback test RX callback | |
280 | * This is called for each received packet during loopback testing. | |
281 | */ | |
282 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
283 | const char *buf_ptr, int pkt_len) | |
284 | { | |
285 | struct efx_selftest_state *state = efx->loopback_selftest; | |
286 | struct efx_loopback_payload *received; | |
287 | struct efx_loopback_payload *payload; | |
288 | ||
289 | BUG_ON(!buf_ptr); | |
290 | ||
291 | /* If we are just flushing, then drop the packet */ | |
292 | if ((state == NULL) || state->flush) | |
293 | return; | |
294 | ||
295 | payload = &state->payload; | |
296 | ||
d3208b5e | 297 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 298 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
299 | if (state->offload_csum) |
300 | received->ip.check = payload->ip.check; | |
301 | ||
3273c2e8 BH |
302 | /* Check that header exists */ |
303 | if (pkt_len < sizeof(received->header)) { | |
304 | EFX_ERR(efx, "saw runt RX packet (length %d) in %s loopback " | |
305 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
306 | goto err; | |
307 | } | |
308 | ||
309 | /* Check that the ethernet header exists */ | |
310 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
311 | EFX_ERR(efx, "saw non-loopback RX packet in %s loopback test\n", | |
312 | LOOPBACK_MODE(efx)); | |
313 | goto err; | |
314 | } | |
315 | ||
316 | /* Check packet length */ | |
317 | if (pkt_len != sizeof(*payload)) { | |
318 | EFX_ERR(efx, "saw incorrect RX packet length %d (wanted %d) in " | |
319 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
320 | LOOPBACK_MODE(efx)); | |
321 | goto err; | |
322 | } | |
323 | ||
324 | /* Check that IP header matches */ | |
325 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
326 | EFX_ERR(efx, "saw corrupted IP header in %s loopback test\n", | |
327 | LOOPBACK_MODE(efx)); | |
328 | goto err; | |
329 | } | |
330 | ||
331 | /* Check that msg and padding matches */ | |
332 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
333 | EFX_ERR(efx, "saw corrupted RX packet in %s loopback test\n", | |
334 | LOOPBACK_MODE(efx)); | |
335 | goto err; | |
336 | } | |
337 | ||
338 | /* Check that iteration matches */ | |
339 | if (received->iteration != payload->iteration) { | |
340 | EFX_ERR(efx, "saw RX packet from iteration %d (wanted %d) in " | |
341 | "%s loopback test\n", ntohs(received->iteration), | |
342 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
343 | goto err; | |
344 | } | |
345 | ||
346 | /* Increase correct RX count */ | |
347 | EFX_TRACE(efx, "got loopback RX in %s loopback test\n", | |
348 | LOOPBACK_MODE(efx)); | |
349 | ||
350 | atomic_inc(&state->rx_good); | |
351 | return; | |
352 | ||
353 | err: | |
354 | #ifdef EFX_ENABLE_DEBUG | |
355 | if (atomic_read(&state->rx_bad) == 0) { | |
356 | EFX_ERR(efx, "received packet:\n"); | |
357 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, | |
358 | buf_ptr, pkt_len, 0); | |
359 | EFX_ERR(efx, "expected packet:\n"); | |
360 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, | |
361 | &state->payload, sizeof(state->payload), 0); | |
362 | } | |
363 | #endif | |
364 | atomic_inc(&state->rx_bad); | |
365 | } | |
366 | ||
367 | /* Initialise an efx_selftest_state for a new iteration */ | |
368 | static void efx_iterate_state(struct efx_nic *efx) | |
369 | { | |
370 | struct efx_selftest_state *state = efx->loopback_selftest; | |
371 | struct net_device *net_dev = efx->net_dev; | |
372 | struct efx_loopback_payload *payload = &state->payload; | |
373 | ||
374 | /* Initialise the layerII header */ | |
375 | memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN); | |
376 | memcpy(&payload->header.h_source, &payload_source, ETH_ALEN); | |
377 | payload->header.h_proto = htons(ETH_P_IP); | |
378 | ||
379 | /* saddr set later and used as incrementing count */ | |
380 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
381 | payload->ip.ihl = 5; | |
382 | payload->ip.check = htons(0xdead); | |
383 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); | |
384 | payload->ip.version = IPVERSION; | |
385 | payload->ip.protocol = IPPROTO_UDP; | |
386 | ||
387 | /* Initialise udp header */ | |
388 | payload->udp.source = 0; | |
389 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
390 | sizeof(struct iphdr)); | |
391 | payload->udp.check = 0; /* checksum ignored */ | |
392 | ||
393 | /* Fill out payload */ | |
394 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
395 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
396 | ||
397 | /* Fill out remaining state members */ | |
398 | atomic_set(&state->rx_good, 0); | |
399 | atomic_set(&state->rx_bad, 0); | |
400 | smp_wmb(); | |
401 | } | |
402 | ||
403 | static int efx_tx_loopback(struct efx_tx_queue *tx_queue) | |
404 | { | |
405 | struct efx_nic *efx = tx_queue->efx; | |
406 | struct efx_selftest_state *state = efx->loopback_selftest; | |
407 | struct efx_loopback_payload *payload; | |
408 | struct sk_buff *skb; | |
409 | int i, rc; | |
410 | ||
411 | /* Transmit N copies of buffer */ | |
412 | for (i = 0; i < state->packet_count; i++) { | |
413 | /* Allocate an skb, holding an extra reference for | |
414 | * transmit completion counting */ | |
415 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
416 | if (!skb) | |
417 | return -ENOMEM; | |
418 | state->skbs[i] = skb; | |
419 | skb_get(skb); | |
420 | ||
421 | /* Copy the payload in, incrementing the source address to | |
422 | * exercise the rss vectors */ | |
423 | payload = ((struct efx_loopback_payload *) | |
424 | skb_put(skb, sizeof(state->payload))); | |
425 | memcpy(payload, &state->payload, sizeof(state->payload)); | |
426 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
427 | ||
428 | /* Ensure everything we've written is visible to the | |
429 | * interrupt handler. */ | |
430 | smp_wmb(); | |
431 | ||
55668611 | 432 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
433 | netif_tx_lock_bh(efx->net_dev); |
434 | rc = efx_xmit(efx, tx_queue, skb); | |
55668611 | 435 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
436 | netif_tx_unlock_bh(efx->net_dev); |
437 | ||
438 | if (rc != NETDEV_TX_OK) { | |
439 | EFX_ERR(efx, "TX queue %d could not transmit packet %d " | |
440 | "of %d in %s loopback test\n", tx_queue->queue, | |
441 | i + 1, state->packet_count, LOOPBACK_MODE(efx)); | |
442 | ||
443 | /* Defer cleaning up the other skbs for the caller */ | |
444 | kfree_skb(skb); | |
445 | return -EPIPE; | |
446 | } | |
447 | } | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
452 | static int efx_rx_loopback(struct efx_tx_queue *tx_queue, | |
453 | struct efx_loopback_self_tests *lb_tests) | |
454 | { | |
455 | struct efx_nic *efx = tx_queue->efx; | |
456 | struct efx_selftest_state *state = efx->loopback_selftest; | |
457 | struct sk_buff *skb; | |
458 | int tx_done = 0, rx_good, rx_bad; | |
459 | int i, rc = 0; | |
460 | ||
55668611 | 461 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
462 | netif_tx_lock_bh(efx->net_dev); |
463 | ||
464 | /* Count the number of tx completions, and decrement the refcnt. Any | |
465 | * skbs not already completed will be free'd when the queue is flushed */ | |
466 | for (i=0; i < state->packet_count; i++) { | |
467 | skb = state->skbs[i]; | |
468 | if (skb && !skb_shared(skb)) | |
469 | ++tx_done; | |
470 | dev_kfree_skb_any(skb); | |
471 | } | |
472 | ||
55668611 | 473 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
474 | netif_tx_unlock_bh(efx->net_dev); |
475 | ||
476 | /* Check TX completion and received packet counts */ | |
477 | rx_good = atomic_read(&state->rx_good); | |
478 | rx_bad = atomic_read(&state->rx_bad); | |
479 | if (tx_done != state->packet_count) { | |
480 | /* Don't free the skbs; they will be picked up on TX | |
481 | * overflow or channel teardown. | |
482 | */ | |
483 | EFX_ERR(efx, "TX queue %d saw only %d out of an expected %d " | |
484 | "TX completion events in %s loopback test\n", | |
485 | tx_queue->queue, tx_done, state->packet_count, | |
486 | LOOPBACK_MODE(efx)); | |
487 | rc = -ETIMEDOUT; | |
488 | /* Allow to fall through so we see the RX errors as well */ | |
489 | } | |
490 | ||
491 | /* We may always be up to a flush away from our desired packet total */ | |
492 | if (rx_good != state->packet_count) { | |
493 | EFX_LOG(efx, "TX queue %d saw only %d out of an expected %d " | |
494 | "received packets in %s loopback test\n", | |
495 | tx_queue->queue, rx_good, state->packet_count, | |
496 | LOOPBACK_MODE(efx)); | |
497 | rc = -ETIMEDOUT; | |
498 | /* Fall through */ | |
499 | } | |
500 | ||
501 | /* Update loopback test structure */ | |
502 | lb_tests->tx_sent[tx_queue->queue] += state->packet_count; | |
503 | lb_tests->tx_done[tx_queue->queue] += tx_done; | |
504 | lb_tests->rx_good += rx_good; | |
505 | lb_tests->rx_bad += rx_bad; | |
506 | ||
507 | return rc; | |
508 | } | |
509 | ||
510 | static int | |
511 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
512 | struct efx_loopback_self_tests *lb_tests) | |
513 | { | |
514 | struct efx_nic *efx = tx_queue->efx; | |
515 | struct efx_selftest_state *state = efx->loopback_selftest; | |
516 | struct efx_channel *channel; | |
a0c2c190 | 517 | int i, tx_rc, rx_rc; |
3273c2e8 BH |
518 | |
519 | for (i = 0; i < loopback_test_level; i++) { | |
520 | /* Determine how many packets to send */ | |
521 | state->packet_count = (efx->type->txd_ring_mask + 1) / 3; | |
522 | state->packet_count = min(1 << (i << 2), state->packet_count); | |
523 | state->skbs = kzalloc(sizeof(state->skbs[0]) * | |
524 | state->packet_count, GFP_KERNEL); | |
9b7bfc4c BH |
525 | if (!state->skbs) |
526 | return -ENOMEM; | |
3273c2e8 BH |
527 | state->flush = 0; |
528 | ||
529 | EFX_LOG(efx, "TX queue %d testing %s loopback with %d " | |
530 | "packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
531 | state->packet_count); | |
532 | ||
533 | efx_iterate_state(efx); | |
a0c2c190 | 534 | tx_rc = efx_tx_loopback(tx_queue); |
3273c2e8 BH |
535 | |
536 | /* NAPI polling is not enabled, so process channels synchronously */ | |
537 | schedule_timeout_uninterruptible(HZ / 50); | |
538 | efx_for_each_channel_with_interrupt(channel, efx) { | |
539 | if (channel->work_pending) | |
540 | efx_process_channel_now(channel); | |
541 | } | |
542 | ||
a0c2c190 | 543 | rx_rc = efx_rx_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
544 | kfree(state->skbs); |
545 | ||
a0c2c190 | 546 | if (tx_rc || rx_rc) { |
3273c2e8 BH |
547 | /* Wait a while to ensure there are no packets |
548 | * floating around after a failure. */ | |
549 | schedule_timeout_uninterruptible(HZ / 10); | |
a0c2c190 | 550 | return tx_rc ? tx_rc : rx_rc; |
3273c2e8 BH |
551 | } |
552 | } | |
553 | ||
554 | EFX_LOG(efx, "TX queue %d passed %s loopback test with a burst length " | |
555 | "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
556 | state->packet_count); | |
557 | ||
a0c2c190 | 558 | return 0; |
3273c2e8 BH |
559 | } |
560 | ||
561 | static int efx_test_loopbacks(struct efx_nic *efx, | |
562 | struct efx_self_tests *tests, | |
563 | unsigned int loopback_modes) | |
564 | { | |
565 | struct efx_selftest_state *state = efx->loopback_selftest; | |
566 | struct ethtool_cmd ecmd, ecmd_loopback; | |
567 | struct efx_tx_queue *tx_queue; | |
568 | enum efx_loopback_mode old_mode, mode; | |
569 | int count, rc = 0, link_up; | |
570 | ||
571 | rc = efx_ethtool_get_settings(efx->net_dev, &ecmd); | |
572 | if (rc) { | |
573 | EFX_ERR(efx, "could not get GMII settings\n"); | |
574 | return rc; | |
575 | } | |
576 | old_mode = efx->loopback_mode; | |
577 | ||
578 | /* Disable autonegotiation for the purposes of loopback */ | |
579 | memcpy(&ecmd_loopback, &ecmd, sizeof(ecmd_loopback)); | |
580 | if (ecmd_loopback.autoneg == AUTONEG_ENABLE) { | |
581 | ecmd_loopback.autoneg = AUTONEG_DISABLE; | |
582 | ecmd_loopback.duplex = DUPLEX_FULL; | |
583 | ecmd_loopback.speed = SPEED_10000; | |
584 | } | |
585 | ||
586 | rc = efx_ethtool_set_settings(efx->net_dev, &ecmd_loopback); | |
587 | if (rc) { | |
588 | EFX_ERR(efx, "could not disable autonegotiation\n"); | |
589 | goto out; | |
590 | } | |
591 | tests->loopback_speed = ecmd_loopback.speed; | |
592 | tests->loopback_full_duplex = ecmd_loopback.duplex; | |
593 | ||
594 | /* Test all supported loopback modes */ | |
595 | for (mode = LOOPBACK_NONE; mode < LOOPBACK_TEST_MAX; mode++) { | |
596 | if (!(loopback_modes & (1 << mode))) | |
597 | continue; | |
598 | ||
599 | /* Move the port into the specified loopback mode. */ | |
600 | state->flush = 1; | |
601 | efx->loopback_mode = mode; | |
602 | efx_reconfigure_port(efx); | |
603 | ||
604 | /* Wait for the PHY to signal the link is up */ | |
605 | count = 0; | |
606 | do { | |
607 | struct efx_channel *channel = &efx->channel[0]; | |
608 | ||
609 | falcon_check_xmac(efx); | |
610 | schedule_timeout_uninterruptible(HZ / 10); | |
611 | if (channel->work_pending) | |
612 | efx_process_channel_now(channel); | |
613 | /* Wait for PHY events to be processed */ | |
614 | flush_workqueue(efx->workqueue); | |
615 | rmb(); | |
616 | ||
617 | /* efx->link_up can be 1 even if the XAUI link is down, | |
618 | * (bug5762). Usually, it's not worth bothering with the | |
619 | * difference, but for selftests, we need that extra | |
620 | * guarantee that the link is really, really, up. | |
621 | */ | |
622 | link_up = efx->link_up; | |
623 | if (!falcon_xaui_link_ok(efx)) | |
624 | link_up = 0; | |
625 | ||
626 | } while ((++count < 20) && !link_up); | |
627 | ||
628 | /* The link should now be up. If it isn't, there is no point | |
629 | * in attempting a loopback test */ | |
630 | if (!link_up) { | |
631 | EFX_ERR(efx, "loopback %s never came up\n", | |
632 | LOOPBACK_MODE(efx)); | |
633 | rc = -EIO; | |
634 | goto out; | |
635 | } | |
636 | ||
637 | EFX_LOG(efx, "link came up in %s loopback in %d iterations\n", | |
638 | LOOPBACK_MODE(efx), count); | |
639 | ||
640 | /* Test every TX queue */ | |
641 | efx_for_each_tx_queue(tx_queue, efx) { | |
60ac1065 BH |
642 | state->offload_csum = (tx_queue->queue == |
643 | EFX_TX_QUEUE_OFFLOAD_CSUM); | |
3273c2e8 BH |
644 | rc |= efx_test_loopback(tx_queue, |
645 | &tests->loopback[mode]); | |
646 | if (rc) | |
647 | goto out; | |
648 | } | |
649 | } | |
650 | ||
651 | out: | |
652 | /* Take out of loopback and restore PHY settings */ | |
653 | state->flush = 1; | |
654 | efx->loopback_mode = old_mode; | |
655 | efx_ethtool_set_settings(efx->net_dev, &ecmd); | |
656 | ||
657 | return rc; | |
658 | } | |
659 | ||
660 | /************************************************************************** | |
661 | * | |
662 | * Entry points | |
663 | * | |
664 | *************************************************************************/ | |
665 | ||
666 | /* Online (i.e. non-disruptive) testing | |
667 | * This checks interrupt generation, event delivery and PHY presence. */ | |
668 | int efx_online_test(struct efx_nic *efx, struct efx_self_tests *tests) | |
669 | { | |
670 | struct efx_channel *channel; | |
671 | int rc = 0; | |
672 | ||
673 | EFX_LOG(efx, "performing online self-tests\n"); | |
674 | ||
675 | rc |= efx_test_interrupts(efx, tests); | |
676 | efx_for_each_channel(channel, efx) { | |
677 | if (channel->has_interrupt) | |
678 | rc |= efx_test_eventq_irq(channel, tests); | |
679 | else | |
680 | rc |= efx_test_eventq(channel, tests); | |
681 | } | |
682 | rc |= efx_test_phy(efx, tests); | |
683 | ||
684 | if (rc) | |
685 | EFX_ERR(efx, "failed online self-tests\n"); | |
686 | ||
687 | return rc; | |
688 | } | |
689 | ||
690 | /* Offline (i.e. disruptive) testing | |
691 | * This checks MAC and PHY loopback on the specified port. */ | |
692 | int efx_offline_test(struct efx_nic *efx, | |
693 | struct efx_self_tests *tests, unsigned int loopback_modes) | |
694 | { | |
695 | struct efx_selftest_state *state; | |
696 | int rc = 0; | |
697 | ||
698 | EFX_LOG(efx, "performing offline self-tests\n"); | |
699 | ||
700 | /* Create a selftest_state structure to hold state for the test */ | |
701 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
702 | if (state == NULL) { | |
703 | rc = -ENOMEM; | |
704 | goto out; | |
705 | } | |
706 | ||
707 | /* Set the port loopback_selftest member. From this point on | |
708 | * all received packets will be dropped. Mark the state as | |
709 | * "flushing" so all inflight packets are dropped */ | |
710 | BUG_ON(efx->loopback_selftest); | |
711 | state->flush = 1; | |
d3208b5e | 712 | efx->loopback_selftest = state; |
3273c2e8 BH |
713 | |
714 | rc = efx_test_loopbacks(efx, tests, loopback_modes); | |
715 | ||
716 | efx->loopback_selftest = NULL; | |
717 | wmb(); | |
718 | kfree(state); | |
719 | ||
720 | out: | |
721 | if (rc) | |
722 | EFX_ERR(efx, "failed offline self-tests\n"); | |
723 | ||
724 | return rc; | |
725 | } | |
726 |