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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" | |
8c8661e4 BH |
29 | #include "spi.h" |
30 | #include "falcon_io.h" | |
31 | #include "mdio_10g.h" | |
3273c2e8 BH |
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 | /** | |
8c8661e4 | 56 | * efx_loopback_state - persistent state during a loopback selftest |
3273c2e8 BH |
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 | */ | |
8c8661e4 | 64 | struct efx_loopback_state { |
dc8cfa55 | 65 | bool flush; |
3273c2e8 BH |
66 | int packet_count; |
67 | struct sk_buff **skbs; | |
60ac1065 BH |
68 | |
69 | /* Checksums are being offloaded */ | |
dc8cfa55 | 70 | bool offload_csum; |
60ac1065 | 71 | |
3273c2e8 BH |
72 | atomic_t rx_good; |
73 | atomic_t rx_bad; | |
74 | struct efx_loopback_payload payload; | |
75 | }; | |
76 | ||
77 | /************************************************************************** | |
78 | * | |
8c8661e4 | 79 | * MII, NVRAM and register tests |
3273c2e8 BH |
80 | * |
81 | **************************************************************************/ | |
82 | ||
8c8661e4 BH |
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 | ||
177dfcd8 BH |
107 | if (EFX_IS10G(efx)) { |
108 | rc = mdio_clause45_check_mmds(efx, efx->phy_op->mmds, 0); | |
109 | if (rc) | |
110 | goto out; | |
111 | } | |
8c8661e4 BH |
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 | } | |
3273c2e8 BH |
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 */ | |
64ee3120 | 162 | efx_for_each_channel(channel, efx) { |
3273c2e8 BH |
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 | ||
3273c2e8 BH |
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 | ||
8c8661e4 | 250 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests) |
3273c2e8 | 251 | { |
8c8661e4 | 252 | int rc; |
3273c2e8 | 253 | |
8c8661e4 | 254 | if (!efx->phy_op->test) |
3273c2e8 | 255 | return 0; |
3273c2e8 | 256 | |
8c8661e4 BH |
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; | |
3273c2e8 BH |
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 | { | |
8c8661e4 | 277 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
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; | |
8c8661e4 | 288 | |
d3208b5e | 289 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 290 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
291 | if (state->offload_csum) |
292 | received->ip.check = payload->ip.check; | |
293 | ||
3273c2e8 BH |
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 | { | |
8c8661e4 | 362 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
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 | ||
b9aafb0e | 395 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
396 | { |
397 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 398 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
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++) { | |
8c8661e4 | 405 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
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 | ||
55668611 | 424 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
425 | netif_tx_lock_bh(efx->net_dev); |
426 | rc = efx_xmit(efx, tx_queue, skb); | |
55668611 | 427 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
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 | ||
b9aafb0e BH |
444 | static int efx_poll_loopback(struct efx_nic *efx) |
445 | { | |
8c8661e4 | 446 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e BH |
447 | struct efx_channel *channel; |
448 | ||
449 | /* NAPI polling is not enabled, so process channels | |
450 | * synchronously */ | |
64ee3120 | 451 | efx_for_each_channel(channel, efx) { |
b9aafb0e BH |
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) | |
3273c2e8 BH |
460 | { |
461 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 462 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
463 | struct sk_buff *skb; |
464 | int tx_done = 0, rx_good, rx_bad; | |
465 | int i, rc = 0; | |
466 | ||
55668611 | 467 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
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 | ||
55668611 | 479 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
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; | |
8c8661e4 | 521 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 522 | int i, begin_rc, end_rc; |
3273c2e8 | 523 | |
8c8661e4 | 524 | for (i = 0; i < 3; i++) { |
3273c2e8 BH |
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); | |
9b7bfc4c BH |
530 | if (!state->skbs) |
531 | return -ENOMEM; | |
dc8cfa55 | 532 | state->flush = false; |
3273c2e8 BH |
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); | |
b9aafb0e BH |
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); | |
3273c2e8 BH |
547 | } |
548 | ||
b9aafb0e | 549 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
550 | kfree(state->skbs); |
551 | ||
b9aafb0e | 552 | if (begin_rc || end_rc) { |
3273c2e8 BH |
553 | /* Wait a while to ensure there are no packets |
554 | * floating around after a failure. */ | |
555 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 556 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
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 | ||
a0c2c190 | 564 | return 0; |
3273c2e8 BH |
565 | } |
566 | ||
8c8661e4 | 567 | static int efx_test_loopbacks(struct efx_nic *efx, struct ethtool_cmd ecmd, |
3273c2e8 BH |
568 | struct efx_self_tests *tests, |
569 | unsigned int loopback_modes) | |
570 | { | |
8c8661e4 BH |
571 | enum efx_loopback_mode mode; |
572 | struct efx_loopback_state *state; | |
3273c2e8 | 573 | struct efx_tx_queue *tx_queue; |
dc8cfa55 | 574 | bool link_up; |
8c8661e4 | 575 | int count, rc = 0; |
3273c2e8 | 576 | |
8c8661e4 BH |
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; | |
3273c2e8 BH |
586 | |
587 | /* Test all supported loopback modes */ | |
8c8661e4 | 588 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
589 | if (!(loopback_modes & (1 << mode))) |
590 | continue; | |
591 | ||
592 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 593 | state->flush = true; |
3273c2e8 BH |
594 | efx->loopback_mode = mode; |
595 | efx_reconfigure_port(efx); | |
596 | ||
766ca0fa BH |
597 | /* Wait for the PHY to signal the link is up. Interrupts |
598 | * are enabled for PHY's using LASI, otherwise we poll() | |
599 | * quickly */ | |
3273c2e8 BH |
600 | count = 0; |
601 | do { | |
602 | struct efx_channel *channel = &efx->channel[0]; | |
603 | ||
766ca0fa | 604 | efx->phy_op->poll(efx); |
3273c2e8 BH |
605 | schedule_timeout_uninterruptible(HZ / 10); |
606 | if (channel->work_pending) | |
607 | efx_process_channel_now(channel); | |
608 | /* Wait for PHY events to be processed */ | |
609 | flush_workqueue(efx->workqueue); | |
610 | rmb(); | |
611 | ||
177dfcd8 BH |
612 | /* We need both the phy and xaui links to be ok. |
613 | * rather than relying on the falcon_xmac irq/poll | |
614 | * regime, just poll xaui directly */ | |
3273c2e8 | 615 | link_up = efx->link_up; |
177dfcd8 BH |
616 | if (link_up && EFX_IS10G(efx) && |
617 | !falcon_xaui_link_ok(efx)) | |
8c8661e4 | 618 | link_up = false; |
3273c2e8 BH |
619 | |
620 | } while ((++count < 20) && !link_up); | |
621 | ||
622 | /* The link should now be up. If it isn't, there is no point | |
623 | * in attempting a loopback test */ | |
624 | if (!link_up) { | |
625 | EFX_ERR(efx, "loopback %s never came up\n", | |
626 | LOOPBACK_MODE(efx)); | |
627 | rc = -EIO; | |
628 | goto out; | |
629 | } | |
630 | ||
631 | EFX_LOG(efx, "link came up in %s loopback in %d iterations\n", | |
632 | LOOPBACK_MODE(efx), count); | |
633 | ||
634 | /* Test every TX queue */ | |
635 | efx_for_each_tx_queue(tx_queue, efx) { | |
60ac1065 BH |
636 | state->offload_csum = (tx_queue->queue == |
637 | EFX_TX_QUEUE_OFFLOAD_CSUM); | |
f8ea0b67 BH |
638 | rc = efx_test_loopback(tx_queue, |
639 | &tests->loopback[mode]); | |
3273c2e8 BH |
640 | if (rc) |
641 | goto out; | |
642 | } | |
643 | } | |
644 | ||
645 | out: | |
8c8661e4 | 646 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 647 | state->flush = true; |
8c8661e4 BH |
648 | efx->loopback_selftest = NULL; |
649 | wmb(); | |
650 | kfree(state); | |
3273c2e8 BH |
651 | |
652 | return rc; | |
653 | } | |
654 | ||
655 | /************************************************************************** | |
656 | * | |
657 | * Entry points | |
658 | * | |
659 | *************************************************************************/ | |
660 | ||
661 | /* Online (i.e. non-disruptive) testing | |
662 | * This checks interrupt generation, event delivery and PHY presence. */ | |
663 | int efx_online_test(struct efx_nic *efx, struct efx_self_tests *tests) | |
664 | { | |
665 | struct efx_channel *channel; | |
8c8661e4 BH |
666 | int rc, rc2 = 0; |
667 | ||
668 | rc = efx_test_mii(efx, tests); | |
669 | if (rc && !rc2) | |
670 | rc2 = rc; | |
671 | ||
672 | rc = efx_test_nvram(efx, tests); | |
673 | if (rc && !rc2) | |
674 | rc2 = rc; | |
3273c2e8 | 675 | |
f8ea0b67 | 676 | rc = efx_test_interrupts(efx, tests); |
8c8661e4 BH |
677 | if (rc && !rc2) |
678 | rc2 = rc; | |
679 | ||
3273c2e8 | 680 | efx_for_each_channel(channel, efx) { |
64ee3120 | 681 | rc = efx_test_eventq_irq(channel, tests); |
8c8661e4 BH |
682 | if (rc && !rc2) |
683 | rc2 = rc; | |
3273c2e8 | 684 | } |
8c8661e4 BH |
685 | |
686 | return rc2; | |
3273c2e8 BH |
687 | } |
688 | ||
689 | /* Offline (i.e. disruptive) testing | |
690 | * This checks MAC and PHY loopback on the specified port. */ | |
691 | int efx_offline_test(struct efx_nic *efx, | |
692 | struct efx_self_tests *tests, unsigned int loopback_modes) | |
693 | { | |
8c8661e4 BH |
694 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
695 | int phy_mode = efx->phy_mode; | |
696 | struct ethtool_cmd ecmd, ecmd_test; | |
697 | int rc, rc2 = 0; | |
698 | ||
699 | /* force the carrier state off so the kernel doesn't transmit during | |
700 | * the loopback test, and the watchdog timeout doesn't fire. Also put | |
701 | * falcon into loopback for the register test. | |
702 | */ | |
703 | mutex_lock(&efx->mac_lock); | |
704 | efx->port_inhibited = true; | |
6f158d5f BH |
705 | if (efx->loopback_modes) { |
706 | /* We need the 312 clock from the PHY to test the XMAC | |
707 | * registers, so move into XGMII loopback if available */ | |
708 | if (efx->loopback_modes & (1 << LOOPBACK_XGMII)) | |
709 | efx->loopback_mode = LOOPBACK_XGMII; | |
710 | else | |
711 | efx->loopback_mode = __ffs(efx->loopback_modes); | |
712 | } | |
713 | ||
8c8661e4 BH |
714 | __efx_reconfigure_port(efx); |
715 | mutex_unlock(&efx->mac_lock); | |
716 | ||
717 | /* free up all consumers of SRAM (including all the queues) */ | |
718 | efx_reset_down(efx, &ecmd); | |
719 | ||
720 | rc = efx_test_chip(efx, tests); | |
721 | if (rc && !rc2) | |
722 | rc2 = rc; | |
723 | ||
724 | /* reset the chip to recover from the register test */ | |
725 | rc = falcon_reset_hw(efx, RESET_TYPE_ALL); | |
726 | ||
727 | /* Modify the saved ecmd so that when efx_reset_up() restores the phy | |
728 | * state, AN is disabled, and the phy is powered, and out of loopback */ | |
729 | memcpy(&ecmd_test, &ecmd, sizeof(ecmd_test)); | |
730 | if (ecmd_test.autoneg == AUTONEG_ENABLE) { | |
731 | ecmd_test.autoneg = AUTONEG_DISABLE; | |
732 | ecmd_test.duplex = DUPLEX_FULL; | |
8c8661e4 BH |
733 | } |
734 | efx->loopback_mode = LOOPBACK_NONE; | |
3273c2e8 | 735 | |
8c8661e4 BH |
736 | rc = efx_reset_up(efx, &ecmd_test, rc == 0); |
737 | if (rc) { | |
738 | EFX_ERR(efx, "Unable to recover from chip test\n"); | |
739 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
740 | return rc; | |
741 | } | |
3273c2e8 | 742 | |
8c8661e4 BH |
743 | rc = efx_test_phy(efx, tests); |
744 | if (rc && !rc2) | |
745 | rc2 = rc; | |
3273c2e8 | 746 | |
8c8661e4 BH |
747 | rc = efx_test_loopbacks(efx, ecmd_test, tests, loopback_modes); |
748 | if (rc && !rc2) | |
749 | rc2 = rc; | |
3273c2e8 | 750 | |
8c8661e4 BH |
751 | /* restore the PHY to the previous state */ |
752 | efx->loopback_mode = loopback_mode; | |
753 | efx->phy_mode = phy_mode; | |
754 | efx->port_inhibited = false; | |
755 | efx_ethtool_set_settings(efx->net_dev, &ecmd); | |
756 | ||
757 | return rc2; | |
3273c2e8 BH |
758 | } |
759 |