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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" | |
3273c2e8 | 23 | #include "efx.h" |
744093c9 | 24 | #include "nic.h" |
3273c2e8 | 25 | #include "selftest.h" |
3273c2e8 | 26 | #include "workarounds.h" |
8c8661e4 | 27 | #include "spi.h" |
12d00cad | 28 | #include "io.h" |
8c8661e4 | 29 | #include "mdio_10g.h" |
3273c2e8 BH |
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 | /** | |
8c8661e4 | 54 | * efx_loopback_state - persistent state during a loopback selftest |
3273c2e8 BH |
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 | |
f30eb23e | 58 | * @offload_csum: Checksums are being offloaded |
3273c2e8 BH |
59 | * @rx_good: RX good packet count |
60 | * @rx_bad: RX bad packet count | |
61 | * @payload: Payload used in tests | |
62 | */ | |
8c8661e4 | 63 | struct efx_loopback_state { |
dc8cfa55 | 64 | bool flush; |
3273c2e8 BH |
65 | int packet_count; |
66 | struct sk_buff **skbs; | |
dc8cfa55 | 67 | bool offload_csum; |
3273c2e8 BH |
68 | atomic_t rx_good; |
69 | atomic_t rx_bad; | |
70 | struct efx_loopback_payload payload; | |
71 | }; | |
72 | ||
73 | /************************************************************************** | |
74 | * | |
8c8661e4 | 75 | * MII, NVRAM and register tests |
3273c2e8 BH |
76 | * |
77 | **************************************************************************/ | |
78 | ||
68e7f45e | 79 | static int efx_test_mdio(struct efx_nic *efx, struct efx_self_tests *tests) |
8c8661e4 BH |
80 | { |
81 | int rc = 0; | |
68e7f45e | 82 | int devad = __ffs(efx->mdio.mmds); |
8c8661e4 | 83 | u16 physid1, physid2; |
8c8661e4 BH |
84 | |
85 | if (efx->phy_type == PHY_TYPE_NONE) | |
86 | return 0; | |
87 | ||
88 | mutex_lock(&efx->mac_lock); | |
68e7f45e | 89 | tests->mdio = -1; |
8c8661e4 | 90 | |
68e7f45e BH |
91 | physid1 = efx_mdio_read(efx, devad, MDIO_DEVID1); |
92 | physid2 = efx_mdio_read(efx, devad, MDIO_DEVID2); | |
8c8661e4 BH |
93 | |
94 | if ((physid1 == 0x0000) || (physid1 == 0xffff) || | |
95 | (physid2 == 0x0000) || (physid2 == 0xffff)) { | |
68e7f45e BH |
96 | EFX_ERR(efx, "no MDIO PHY present with ID %d\n", |
97 | efx->mdio.prtad); | |
8c8661e4 BH |
98 | rc = -EINVAL; |
99 | goto out; | |
100 | } | |
101 | ||
177dfcd8 | 102 | if (EFX_IS10G(efx)) { |
c1c4f453 | 103 | rc = efx_mdio_check_mmds(efx, efx->mdio.mmds, 0); |
177dfcd8 BH |
104 | if (rc) |
105 | goto out; | |
106 | } | |
8c8661e4 BH |
107 | |
108 | out: | |
109 | mutex_unlock(&efx->mac_lock); | |
68e7f45e | 110 | tests->mdio = rc ? -1 : 1; |
8c8661e4 BH |
111 | return rc; |
112 | } | |
113 | ||
114 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
115 | { | |
0aa3fbaa BH |
116 | int rc = 0; |
117 | ||
118 | if (efx->type->test_nvram) { | |
119 | rc = efx->type->test_nvram(efx); | |
120 | tests->nvram = rc ? -1 : 1; | |
121 | } | |
8c8661e4 | 122 | |
8c8661e4 BH |
123 | return rc; |
124 | } | |
125 | ||
126 | static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests) | |
127 | { | |
9bfc4bb1 | 128 | int rc = 0; |
8c8661e4 | 129 | |
9bfc4bb1 BH |
130 | /* Test register access */ |
131 | if (efx->type->test_registers) { | |
132 | rc = efx->type->test_registers(efx); | |
133 | tests->registers = rc ? -1 : 1; | |
134 | } | |
8c8661e4 | 135 | |
8c8661e4 BH |
136 | return rc; |
137 | } | |
3273c2e8 BH |
138 | |
139 | /************************************************************************** | |
140 | * | |
141 | * Interrupt and event queue testing | |
142 | * | |
143 | **************************************************************************/ | |
144 | ||
145 | /* Test generation and receipt of interrupts */ | |
146 | static int efx_test_interrupts(struct efx_nic *efx, | |
147 | struct efx_self_tests *tests) | |
148 | { | |
149 | struct efx_channel *channel; | |
150 | ||
151 | EFX_LOG(efx, "testing interrupts\n"); | |
152 | tests->interrupt = -1; | |
153 | ||
154 | /* Reset interrupt flag */ | |
155 | efx->last_irq_cpu = -1; | |
156 | smp_wmb(); | |
157 | ||
158 | /* ACK each interrupting event queue. Receiving an interrupt due to | |
159 | * traffic before a test event is raised is considered a pass */ | |
64ee3120 | 160 | efx_for_each_channel(channel, efx) { |
3273c2e8 BH |
161 | if (channel->work_pending) |
162 | efx_process_channel_now(channel); | |
163 | if (efx->last_irq_cpu >= 0) | |
164 | goto success; | |
165 | } | |
166 | ||
152b6a62 | 167 | efx_nic_generate_interrupt(efx); |
3273c2e8 BH |
168 | |
169 | /* Wait for arrival of test interrupt. */ | |
170 | EFX_LOG(efx, "waiting for test interrupt\n"); | |
171 | schedule_timeout_uninterruptible(HZ / 10); | |
172 | if (efx->last_irq_cpu >= 0) | |
173 | goto success; | |
174 | ||
175 | EFX_ERR(efx, "timed out waiting for interrupt\n"); | |
176 | return -ETIMEDOUT; | |
177 | ||
178 | success: | |
c459302d BH |
179 | EFX_LOG(efx, "%s test interrupt seen on CPU%d\n", INT_MODE(efx), |
180 | efx->last_irq_cpu); | |
3273c2e8 BH |
181 | tests->interrupt = 1; |
182 | return 0; | |
183 | } | |
184 | ||
3273c2e8 BH |
185 | /* Test generation and receipt of interrupting events */ |
186 | static int efx_test_eventq_irq(struct efx_channel *channel, | |
187 | struct efx_self_tests *tests) | |
188 | { | |
189 | unsigned int magic, count; | |
190 | ||
191 | /* Channel specific code, limited to 20 bits */ | |
192 | magic = (0x00010150 + channel->channel); | |
193 | EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n", | |
194 | channel->channel, magic); | |
195 | ||
196 | tests->eventq_dma[channel->channel] = -1; | |
197 | tests->eventq_int[channel->channel] = -1; | |
198 | tests->eventq_poll[channel->channel] = -1; | |
199 | ||
200 | /* Reset flag and zero magic word */ | |
201 | channel->efx->last_irq_cpu = -1; | |
202 | channel->eventq_magic = 0; | |
203 | smp_wmb(); | |
204 | ||
152b6a62 | 205 | efx_nic_generate_test_event(channel, magic); |
3273c2e8 BH |
206 | |
207 | /* Wait for arrival of interrupt */ | |
208 | count = 0; | |
209 | do { | |
210 | schedule_timeout_uninterruptible(HZ / 100); | |
211 | ||
212 | if (channel->work_pending) | |
213 | efx_process_channel_now(channel); | |
214 | ||
215 | if (channel->eventq_magic == magic) | |
216 | goto eventq_ok; | |
217 | } while (++count < 2); | |
218 | ||
219 | EFX_ERR(channel->efx, "channel %d timed out waiting for event queue\n", | |
220 | channel->channel); | |
221 | ||
222 | /* See if interrupt arrived */ | |
223 | if (channel->efx->last_irq_cpu >= 0) { | |
224 | EFX_ERR(channel->efx, "channel %d saw interrupt on CPU%d " | |
225 | "during event queue test\n", channel->channel, | |
226 | raw_smp_processor_id()); | |
227 | tests->eventq_int[channel->channel] = 1; | |
228 | } | |
229 | ||
230 | /* Check to see if event was received even if interrupt wasn't */ | |
231 | efx_process_channel_now(channel); | |
232 | if (channel->eventq_magic == magic) { | |
233 | EFX_ERR(channel->efx, "channel %d event was generated, but " | |
234 | "failed to trigger an interrupt\n", channel->channel); | |
235 | tests->eventq_dma[channel->channel] = 1; | |
236 | } | |
237 | ||
238 | return -ETIMEDOUT; | |
239 | eventq_ok: | |
240 | EFX_LOG(channel->efx, "channel %d event queue passed\n", | |
241 | channel->channel); | |
242 | tests->eventq_dma[channel->channel] = 1; | |
243 | tests->eventq_int[channel->channel] = 1; | |
244 | tests->eventq_poll[channel->channel] = 1; | |
245 | return 0; | |
246 | } | |
247 | ||
1796721a BH |
248 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
249 | unsigned flags) | |
3273c2e8 | 250 | { |
8c8661e4 | 251 | int rc; |
3273c2e8 | 252 | |
1796721a | 253 | if (!efx->phy_op->run_tests) |
3273c2e8 | 254 | return 0; |
3273c2e8 | 255 | |
8c8661e4 | 256 | mutex_lock(&efx->mac_lock); |
1796721a | 257 | rc = efx->phy_op->run_tests(efx, tests->phy, flags); |
8c8661e4 | 258 | mutex_unlock(&efx->mac_lock); |
8c8661e4 | 259 | return rc; |
3273c2e8 BH |
260 | } |
261 | ||
262 | /************************************************************************** | |
263 | * | |
264 | * Loopback testing | |
265 | * NB Only one loopback test can be executing concurrently. | |
266 | * | |
267 | **************************************************************************/ | |
268 | ||
269 | /* Loopback test RX callback | |
270 | * This is called for each received packet during loopback testing. | |
271 | */ | |
272 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
273 | const char *buf_ptr, int pkt_len) | |
274 | { | |
8c8661e4 | 275 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
276 | struct efx_loopback_payload *received; |
277 | struct efx_loopback_payload *payload; | |
278 | ||
279 | BUG_ON(!buf_ptr); | |
280 | ||
281 | /* If we are just flushing, then drop the packet */ | |
282 | if ((state == NULL) || state->flush) | |
283 | return; | |
284 | ||
285 | payload = &state->payload; | |
8c8661e4 | 286 | |
d3208b5e | 287 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 288 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
289 | if (state->offload_csum) |
290 | received->ip.check = payload->ip.check; | |
291 | ||
3273c2e8 BH |
292 | /* Check that header exists */ |
293 | if (pkt_len < sizeof(received->header)) { | |
294 | EFX_ERR(efx, "saw runt RX packet (length %d) in %s loopback " | |
295 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
296 | goto err; | |
297 | } | |
298 | ||
299 | /* Check that the ethernet header exists */ | |
300 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
301 | EFX_ERR(efx, "saw non-loopback RX packet in %s loopback test\n", | |
302 | LOOPBACK_MODE(efx)); | |
303 | goto err; | |
304 | } | |
305 | ||
306 | /* Check packet length */ | |
307 | if (pkt_len != sizeof(*payload)) { | |
308 | EFX_ERR(efx, "saw incorrect RX packet length %d (wanted %d) in " | |
309 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
310 | LOOPBACK_MODE(efx)); | |
311 | goto err; | |
312 | } | |
313 | ||
314 | /* Check that IP header matches */ | |
315 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
316 | EFX_ERR(efx, "saw corrupted IP header in %s loopback test\n", | |
317 | LOOPBACK_MODE(efx)); | |
318 | goto err; | |
319 | } | |
320 | ||
321 | /* Check that msg and padding matches */ | |
322 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
323 | EFX_ERR(efx, "saw corrupted RX packet in %s loopback test\n", | |
324 | LOOPBACK_MODE(efx)); | |
325 | goto err; | |
326 | } | |
327 | ||
328 | /* Check that iteration matches */ | |
329 | if (received->iteration != payload->iteration) { | |
330 | EFX_ERR(efx, "saw RX packet from iteration %d (wanted %d) in " | |
331 | "%s loopback test\n", ntohs(received->iteration), | |
332 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
333 | goto err; | |
334 | } | |
335 | ||
336 | /* Increase correct RX count */ | |
337 | EFX_TRACE(efx, "got loopback RX in %s loopback test\n", | |
338 | LOOPBACK_MODE(efx)); | |
339 | ||
340 | atomic_inc(&state->rx_good); | |
341 | return; | |
342 | ||
343 | err: | |
344 | #ifdef EFX_ENABLE_DEBUG | |
345 | if (atomic_read(&state->rx_bad) == 0) { | |
346 | EFX_ERR(efx, "received packet:\n"); | |
347 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, | |
348 | buf_ptr, pkt_len, 0); | |
349 | EFX_ERR(efx, "expected packet:\n"); | |
350 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, | |
351 | &state->payload, sizeof(state->payload), 0); | |
352 | } | |
353 | #endif | |
354 | atomic_inc(&state->rx_bad); | |
355 | } | |
356 | ||
357 | /* Initialise an efx_selftest_state for a new iteration */ | |
358 | static void efx_iterate_state(struct efx_nic *efx) | |
359 | { | |
8c8661e4 | 360 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
361 | struct net_device *net_dev = efx->net_dev; |
362 | struct efx_loopback_payload *payload = &state->payload; | |
363 | ||
364 | /* Initialise the layerII header */ | |
365 | memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN); | |
366 | memcpy(&payload->header.h_source, &payload_source, ETH_ALEN); | |
367 | payload->header.h_proto = htons(ETH_P_IP); | |
368 | ||
369 | /* saddr set later and used as incrementing count */ | |
370 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
371 | payload->ip.ihl = 5; | |
372 | payload->ip.check = htons(0xdead); | |
373 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); | |
374 | payload->ip.version = IPVERSION; | |
375 | payload->ip.protocol = IPPROTO_UDP; | |
376 | ||
377 | /* Initialise udp header */ | |
378 | payload->udp.source = 0; | |
379 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
380 | sizeof(struct iphdr)); | |
381 | payload->udp.check = 0; /* checksum ignored */ | |
382 | ||
383 | /* Fill out payload */ | |
384 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
385 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
386 | ||
387 | /* Fill out remaining state members */ | |
388 | atomic_set(&state->rx_good, 0); | |
389 | atomic_set(&state->rx_bad, 0); | |
390 | smp_wmb(); | |
391 | } | |
392 | ||
b9aafb0e | 393 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
394 | { |
395 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 396 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
397 | struct efx_loopback_payload *payload; |
398 | struct sk_buff *skb; | |
61357325 SH |
399 | int i; |
400 | netdev_tx_t rc; | |
3273c2e8 BH |
401 | |
402 | /* Transmit N copies of buffer */ | |
403 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 404 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
405 | * transmit completion counting */ |
406 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
407 | if (!skb) | |
408 | return -ENOMEM; | |
409 | state->skbs[i] = skb; | |
410 | skb_get(skb); | |
411 | ||
412 | /* Copy the payload in, incrementing the source address to | |
413 | * exercise the rss vectors */ | |
414 | payload = ((struct efx_loopback_payload *) | |
415 | skb_put(skb, sizeof(state->payload))); | |
416 | memcpy(payload, &state->payload, sizeof(state->payload)); | |
417 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
418 | ||
419 | /* Ensure everything we've written is visible to the | |
420 | * interrupt handler. */ | |
421 | smp_wmb(); | |
422 | ||
55668611 | 423 | if (efx_dev_registered(efx)) |
3273c2e8 | 424 | netif_tx_lock_bh(efx->net_dev); |
497f5ba3 | 425 | rc = efx_enqueue_skb(tx_queue, skb); |
55668611 | 426 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
427 | netif_tx_unlock_bh(efx->net_dev); |
428 | ||
429 | if (rc != NETDEV_TX_OK) { | |
430 | EFX_ERR(efx, "TX queue %d could not transmit packet %d " | |
431 | "of %d in %s loopback test\n", tx_queue->queue, | |
432 | i + 1, state->packet_count, LOOPBACK_MODE(efx)); | |
433 | ||
434 | /* Defer cleaning up the other skbs for the caller */ | |
435 | kfree_skb(skb); | |
436 | return -EPIPE; | |
437 | } | |
438 | } | |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
b9aafb0e BH |
443 | static int efx_poll_loopback(struct efx_nic *efx) |
444 | { | |
8c8661e4 | 445 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e BH |
446 | struct efx_channel *channel; |
447 | ||
448 | /* NAPI polling is not enabled, so process channels | |
449 | * synchronously */ | |
64ee3120 | 450 | efx_for_each_channel(channel, efx) { |
b9aafb0e BH |
451 | if (channel->work_pending) |
452 | efx_process_channel_now(channel); | |
453 | } | |
454 | return atomic_read(&state->rx_good) == state->packet_count; | |
455 | } | |
456 | ||
457 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
458 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
459 | { |
460 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 461 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
462 | struct sk_buff *skb; |
463 | int tx_done = 0, rx_good, rx_bad; | |
464 | int i, rc = 0; | |
465 | ||
55668611 | 466 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
467 | netif_tx_lock_bh(efx->net_dev); |
468 | ||
469 | /* Count the number of tx completions, and decrement the refcnt. Any | |
470 | * skbs not already completed will be free'd when the queue is flushed */ | |
471 | for (i=0; i < state->packet_count; i++) { | |
472 | skb = state->skbs[i]; | |
473 | if (skb && !skb_shared(skb)) | |
474 | ++tx_done; | |
475 | dev_kfree_skb_any(skb); | |
476 | } | |
477 | ||
55668611 | 478 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
479 | netif_tx_unlock_bh(efx->net_dev); |
480 | ||
481 | /* Check TX completion and received packet counts */ | |
482 | rx_good = atomic_read(&state->rx_good); | |
483 | rx_bad = atomic_read(&state->rx_bad); | |
484 | if (tx_done != state->packet_count) { | |
485 | /* Don't free the skbs; they will be picked up on TX | |
486 | * overflow or channel teardown. | |
487 | */ | |
488 | EFX_ERR(efx, "TX queue %d saw only %d out of an expected %d " | |
489 | "TX completion events in %s loopback test\n", | |
490 | tx_queue->queue, tx_done, state->packet_count, | |
491 | LOOPBACK_MODE(efx)); | |
492 | rc = -ETIMEDOUT; | |
493 | /* Allow to fall through so we see the RX errors as well */ | |
494 | } | |
495 | ||
496 | /* We may always be up to a flush away from our desired packet total */ | |
497 | if (rx_good != state->packet_count) { | |
498 | EFX_LOG(efx, "TX queue %d saw only %d out of an expected %d " | |
499 | "received packets in %s loopback test\n", | |
500 | tx_queue->queue, rx_good, state->packet_count, | |
501 | LOOPBACK_MODE(efx)); | |
502 | rc = -ETIMEDOUT; | |
503 | /* Fall through */ | |
504 | } | |
505 | ||
506 | /* Update loopback test structure */ | |
507 | lb_tests->tx_sent[tx_queue->queue] += state->packet_count; | |
508 | lb_tests->tx_done[tx_queue->queue] += tx_done; | |
509 | lb_tests->rx_good += rx_good; | |
510 | lb_tests->rx_bad += rx_bad; | |
511 | ||
512 | return rc; | |
513 | } | |
514 | ||
515 | static int | |
516 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
517 | struct efx_loopback_self_tests *lb_tests) | |
518 | { | |
519 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 520 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 521 | int i, begin_rc, end_rc; |
3273c2e8 | 522 | |
8c8661e4 | 523 | for (i = 0; i < 3; i++) { |
3273c2e8 | 524 | /* Determine how many packets to send */ |
3ffeabdd | 525 | state->packet_count = EFX_TXQ_SIZE / 3; |
3273c2e8 BH |
526 | state->packet_count = min(1 << (i << 2), state->packet_count); |
527 | state->skbs = kzalloc(sizeof(state->skbs[0]) * | |
528 | state->packet_count, GFP_KERNEL); | |
9b7bfc4c BH |
529 | if (!state->skbs) |
530 | return -ENOMEM; | |
dc8cfa55 | 531 | state->flush = false; |
3273c2e8 BH |
532 | |
533 | EFX_LOG(efx, "TX queue %d testing %s loopback with %d " | |
534 | "packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
535 | state->packet_count); | |
536 | ||
537 | efx_iterate_state(efx); | |
b9aafb0e BH |
538 | begin_rc = efx_begin_loopback(tx_queue); |
539 | ||
540 | /* This will normally complete very quickly, but be | |
541 | * prepared to wait up to 100 ms. */ | |
542 | msleep(1); | |
543 | if (!efx_poll_loopback(efx)) { | |
544 | msleep(100); | |
545 | efx_poll_loopback(efx); | |
3273c2e8 BH |
546 | } |
547 | ||
b9aafb0e | 548 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
549 | kfree(state->skbs); |
550 | ||
b9aafb0e | 551 | if (begin_rc || end_rc) { |
3273c2e8 BH |
552 | /* Wait a while to ensure there are no packets |
553 | * floating around after a failure. */ | |
554 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 555 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
556 | } |
557 | } | |
558 | ||
559 | EFX_LOG(efx, "TX queue %d passed %s loopback test with a burst length " | |
560 | "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
561 | state->packet_count); | |
562 | ||
a0c2c190 | 563 | return 0; |
3273c2e8 BH |
564 | } |
565 | ||
78c1f0a0 SH |
566 | /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
567 | * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it | |
568 | * to delay and retry. Therefore, it's safer to just poll directly. Wait | |
569 | * for link up and any faults to dissipate. */ | |
570 | static int efx_wait_for_link(struct efx_nic *efx) | |
571 | { | |
572 | struct efx_link_state *link_state = &efx->link_state; | |
573 | int count; | |
574 | bool link_up; | |
575 | ||
576 | for (count = 0; count < 40; count++) { | |
577 | schedule_timeout_uninterruptible(HZ / 10); | |
578 | ||
579 | if (efx->type->monitor != NULL) { | |
580 | mutex_lock(&efx->mac_lock); | |
581 | efx->type->monitor(efx); | |
582 | mutex_unlock(&efx->mac_lock); | |
583 | } else { | |
584 | struct efx_channel *channel = &efx->channel[0]; | |
585 | if (channel->work_pending) | |
586 | efx_process_channel_now(channel); | |
587 | } | |
588 | ||
589 | mutex_lock(&efx->mac_lock); | |
590 | link_up = link_state->up; | |
591 | if (link_up) | |
592 | link_up = !efx->mac_op->check_fault(efx); | |
593 | mutex_unlock(&efx->mac_lock); | |
594 | ||
595 | if (link_up) | |
596 | return 0; | |
597 | } | |
598 | ||
599 | return -ETIMEDOUT; | |
600 | } | |
601 | ||
a5692e49 | 602 | static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
3273c2e8 BH |
603 | unsigned int loopback_modes) |
604 | { | |
8c8661e4 BH |
605 | enum efx_loopback_mode mode; |
606 | struct efx_loopback_state *state; | |
3273c2e8 | 607 | struct efx_tx_queue *tx_queue; |
78c1f0a0 | 608 | int rc = 0; |
3273c2e8 | 609 | |
8c8661e4 BH |
610 | /* Set the port loopback_selftest member. From this point on |
611 | * all received packets will be dropped. Mark the state as | |
612 | * "flushing" so all inflight packets are dropped */ | |
613 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
614 | if (state == NULL) | |
615 | return -ENOMEM; | |
616 | BUG_ON(efx->loopback_selftest); | |
617 | state->flush = true; | |
618 | efx->loopback_selftest = state; | |
3273c2e8 BH |
619 | |
620 | /* Test all supported loopback modes */ | |
8c8661e4 | 621 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
622 | if (!(loopback_modes & (1 << mode))) |
623 | continue; | |
624 | ||
625 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 626 | state->flush = true; |
78c1f0a0 | 627 | mutex_lock(&efx->mac_lock); |
3273c2e8 | 628 | efx->loopback_mode = mode; |
78c1f0a0 SH |
629 | rc = __efx_reconfigure_port(efx); |
630 | mutex_unlock(&efx->mac_lock); | |
631 | if (rc) { | |
632 | EFX_ERR(efx, "unable to move into %s loopback\n", | |
633 | LOOPBACK_MODE(efx)); | |
634 | goto out; | |
635 | } | |
3273c2e8 | 636 | |
78c1f0a0 SH |
637 | rc = efx_wait_for_link(efx); |
638 | if (rc) { | |
3273c2e8 BH |
639 | EFX_ERR(efx, "loopback %s never came up\n", |
640 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
641 | goto out; |
642 | } | |
643 | ||
3273c2e8 BH |
644 | /* Test every TX queue */ |
645 | efx_for_each_tx_queue(tx_queue, efx) { | |
60ac1065 BH |
646 | state->offload_csum = (tx_queue->queue == |
647 | EFX_TX_QUEUE_OFFLOAD_CSUM); | |
f8ea0b67 BH |
648 | rc = efx_test_loopback(tx_queue, |
649 | &tests->loopback[mode]); | |
3273c2e8 BH |
650 | if (rc) |
651 | goto out; | |
652 | } | |
653 | } | |
654 | ||
655 | out: | |
8c8661e4 | 656 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 657 | state->flush = true; |
8c8661e4 BH |
658 | efx->loopback_selftest = NULL; |
659 | wmb(); | |
660 | kfree(state); | |
3273c2e8 BH |
661 | |
662 | return rc; | |
663 | } | |
664 | ||
665 | /************************************************************************** | |
666 | * | |
2ef3068e | 667 | * Entry point |
3273c2e8 BH |
668 | * |
669 | *************************************************************************/ | |
670 | ||
2ef3068e BH |
671 | int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
672 | unsigned flags) | |
3273c2e8 | 673 | { |
2ef3068e BH |
674 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
675 | int phy_mode = efx->phy_mode; | |
4b988280 | 676 | enum reset_type reset_method = RESET_TYPE_INVISIBLE; |
3273c2e8 | 677 | struct efx_channel *channel; |
2ef3068e BH |
678 | int rc_test = 0, rc_reset = 0, rc; |
679 | ||
680 | /* Online (i.e. non-disruptive) testing | |
681 | * This checks interrupt generation, event delivery and PHY presence. */ | |
8c8661e4 | 682 | |
68e7f45e | 683 | rc = efx_test_mdio(efx, tests); |
2ef3068e BH |
684 | if (rc && !rc_test) |
685 | rc_test = rc; | |
8c8661e4 BH |
686 | |
687 | rc = efx_test_nvram(efx, tests); | |
2ef3068e BH |
688 | if (rc && !rc_test) |
689 | rc_test = rc; | |
3273c2e8 | 690 | |
f8ea0b67 | 691 | rc = efx_test_interrupts(efx, tests); |
2ef3068e BH |
692 | if (rc && !rc_test) |
693 | rc_test = rc; | |
8c8661e4 | 694 | |
3273c2e8 | 695 | efx_for_each_channel(channel, efx) { |
64ee3120 | 696 | rc = efx_test_eventq_irq(channel, tests); |
2ef3068e BH |
697 | if (rc && !rc_test) |
698 | rc_test = rc; | |
3273c2e8 | 699 | } |
8c8661e4 | 700 | |
2ef3068e BH |
701 | if (rc_test) |
702 | return rc_test; | |
3273c2e8 | 703 | |
2ef3068e | 704 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 705 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
706 | |
707 | /* Offline (i.e. disruptive) testing | |
708 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 BH |
709 | |
710 | /* force the carrier state off so the kernel doesn't transmit during | |
711 | * the loopback test, and the watchdog timeout doesn't fire. Also put | |
712 | * falcon into loopback for the register test. | |
713 | */ | |
714 | mutex_lock(&efx->mac_lock); | |
715 | efx->port_inhibited = true; | |
6f158d5f BH |
716 | if (efx->loopback_modes) { |
717 | /* We need the 312 clock from the PHY to test the XMAC | |
718 | * registers, so move into XGMII loopback if available */ | |
719 | if (efx->loopback_modes & (1 << LOOPBACK_XGMII)) | |
720 | efx->loopback_mode = LOOPBACK_XGMII; | |
721 | else | |
722 | efx->loopback_mode = __ffs(efx->loopback_modes); | |
723 | } | |
724 | ||
8c8661e4 BH |
725 | __efx_reconfigure_port(efx); |
726 | mutex_unlock(&efx->mac_lock); | |
727 | ||
728 | /* free up all consumers of SRAM (including all the queues) */ | |
d3245b28 | 729 | efx_reset_down(efx, reset_method); |
8c8661e4 BH |
730 | |
731 | rc = efx_test_chip(efx, tests); | |
2ef3068e BH |
732 | if (rc && !rc_test) |
733 | rc_test = rc; | |
8c8661e4 BH |
734 | |
735 | /* reset the chip to recover from the register test */ | |
ef2b90ee | 736 | rc_reset = efx->type->reset(efx, reset_method); |
8c8661e4 | 737 | |
a5692e49 BH |
738 | /* Ensure that the phy is powered and out of loopback |
739 | * for the bist and loopback tests */ | |
740 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; | |
8c8661e4 | 741 | efx->loopback_mode = LOOPBACK_NONE; |
3273c2e8 | 742 | |
d3245b28 | 743 | rc = efx_reset_up(efx, reset_method, rc_reset == 0); |
2ef3068e BH |
744 | if (rc && !rc_reset) |
745 | rc_reset = rc; | |
746 | ||
747 | if (rc_reset) { | |
8c8661e4 BH |
748 | EFX_ERR(efx, "Unable to recover from chip test\n"); |
749 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
2ef3068e | 750 | return rc_reset; |
8c8661e4 | 751 | } |
3273c2e8 | 752 | |
1796721a | 753 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
754 | if (rc && !rc_test) |
755 | rc_test = rc; | |
3273c2e8 | 756 | |
2ef3068e BH |
757 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
758 | if (rc && !rc_test) | |
759 | rc_test = rc; | |
3273c2e8 | 760 | |
8c8661e4 | 761 | /* restore the PHY to the previous state */ |
d3245b28 | 762 | mutex_lock(&efx->mac_lock); |
8c8661e4 BH |
763 | efx->phy_mode = phy_mode; |
764 | efx->port_inhibited = false; | |
d3245b28 BH |
765 | efx->loopback_mode = loopback_mode; |
766 | __efx_reconfigure_port(efx); | |
767 | mutex_unlock(&efx->mac_lock); | |
8c8661e4 | 768 | |
2ef3068e | 769 | return rc_test; |
3273c2e8 BH |
770 | } |
771 |