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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 | ||
68e7f45e | 83 | static int efx_test_mdio(struct efx_nic *efx, struct efx_self_tests *tests) |
8c8661e4 BH |
84 | { |
85 | int rc = 0; | |
68e7f45e | 86 | int devad = __ffs(efx->mdio.mmds); |
8c8661e4 | 87 | u16 physid1, physid2; |
8c8661e4 BH |
88 | |
89 | if (efx->phy_type == PHY_TYPE_NONE) | |
90 | return 0; | |
91 | ||
92 | mutex_lock(&efx->mac_lock); | |
68e7f45e | 93 | tests->mdio = -1; |
8c8661e4 | 94 | |
68e7f45e BH |
95 | physid1 = efx_mdio_read(efx, devad, MDIO_DEVID1); |
96 | physid2 = efx_mdio_read(efx, devad, MDIO_DEVID2); | |
8c8661e4 BH |
97 | |
98 | if ((physid1 == 0x0000) || (physid1 == 0xffff) || | |
99 | (physid2 == 0x0000) || (physid2 == 0xffff)) { | |
68e7f45e BH |
100 | EFX_ERR(efx, "no MDIO PHY present with ID %d\n", |
101 | efx->mdio.prtad); | |
8c8661e4 BH |
102 | rc = -EINVAL; |
103 | goto out; | |
104 | } | |
105 | ||
177dfcd8 | 106 | if (EFX_IS10G(efx)) { |
68e7f45e | 107 | rc = efx_mdio_check_mmds(efx, efx->phy_op->mmds, 0); |
177dfcd8 BH |
108 | if (rc) |
109 | goto out; | |
110 | } | |
8c8661e4 BH |
111 | |
112 | out: | |
113 | mutex_unlock(&efx->mac_lock); | |
68e7f45e | 114 | tests->mdio = rc ? -1 : 1; |
8c8661e4 BH |
115 | return rc; |
116 | } | |
117 | ||
118 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
119 | { | |
120 | int rc; | |
121 | ||
122 | rc = falcon_read_nvram(efx, NULL); | |
123 | tests->nvram = rc ? -1 : 1; | |
124 | return rc; | |
125 | } | |
126 | ||
127 | static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests) | |
128 | { | |
129 | int rc; | |
130 | ||
131 | /* Not supported on A-series silicon */ | |
132 | if (falcon_rev(efx) < FALCON_REV_B0) | |
133 | return 0; | |
134 | ||
135 | rc = falcon_test_registers(efx); | |
136 | tests->registers = rc ? -1 : 1; | |
137 | return rc; | |
138 | } | |
3273c2e8 BH |
139 | |
140 | /************************************************************************** | |
141 | * | |
142 | * Interrupt and event queue testing | |
143 | * | |
144 | **************************************************************************/ | |
145 | ||
146 | /* Test generation and receipt of interrupts */ | |
147 | static int efx_test_interrupts(struct efx_nic *efx, | |
148 | struct efx_self_tests *tests) | |
149 | { | |
150 | struct efx_channel *channel; | |
151 | ||
152 | EFX_LOG(efx, "testing interrupts\n"); | |
153 | tests->interrupt = -1; | |
154 | ||
155 | /* Reset interrupt flag */ | |
156 | efx->last_irq_cpu = -1; | |
157 | smp_wmb(); | |
158 | ||
159 | /* ACK each interrupting event queue. Receiving an interrupt due to | |
160 | * traffic before a test event is raised is considered a pass */ | |
64ee3120 | 161 | efx_for_each_channel(channel, efx) { |
3273c2e8 BH |
162 | if (channel->work_pending) |
163 | efx_process_channel_now(channel); | |
164 | if (efx->last_irq_cpu >= 0) | |
165 | goto success; | |
166 | } | |
167 | ||
168 | falcon_generate_interrupt(efx); | |
169 | ||
170 | /* Wait for arrival of test interrupt. */ | |
171 | EFX_LOG(efx, "waiting for test interrupt\n"); | |
172 | schedule_timeout_uninterruptible(HZ / 10); | |
173 | if (efx->last_irq_cpu >= 0) | |
174 | goto success; | |
175 | ||
176 | EFX_ERR(efx, "timed out waiting for interrupt\n"); | |
177 | return -ETIMEDOUT; | |
178 | ||
179 | success: | |
180 | EFX_LOG(efx, "test interrupt (mode %d) seen on CPU%d\n", | |
181 | efx->interrupt_mode, efx->last_irq_cpu); | |
182 | tests->interrupt = 1; | |
183 | return 0; | |
184 | } | |
185 | ||
3273c2e8 BH |
186 | /* Test generation and receipt of interrupting events */ |
187 | static int efx_test_eventq_irq(struct efx_channel *channel, | |
188 | struct efx_self_tests *tests) | |
189 | { | |
190 | unsigned int magic, count; | |
191 | ||
192 | /* Channel specific code, limited to 20 bits */ | |
193 | magic = (0x00010150 + channel->channel); | |
194 | EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n", | |
195 | channel->channel, magic); | |
196 | ||
197 | tests->eventq_dma[channel->channel] = -1; | |
198 | tests->eventq_int[channel->channel] = -1; | |
199 | tests->eventq_poll[channel->channel] = -1; | |
200 | ||
201 | /* Reset flag and zero magic word */ | |
202 | channel->efx->last_irq_cpu = -1; | |
203 | channel->eventq_magic = 0; | |
204 | smp_wmb(); | |
205 | ||
206 | falcon_generate_test_event(channel, magic); | |
207 | ||
208 | /* Wait for arrival of interrupt */ | |
209 | count = 0; | |
210 | do { | |
211 | schedule_timeout_uninterruptible(HZ / 100); | |
212 | ||
213 | if (channel->work_pending) | |
214 | efx_process_channel_now(channel); | |
215 | ||
216 | if (channel->eventq_magic == magic) | |
217 | goto eventq_ok; | |
218 | } while (++count < 2); | |
219 | ||
220 | EFX_ERR(channel->efx, "channel %d timed out waiting for event queue\n", | |
221 | channel->channel); | |
222 | ||
223 | /* See if interrupt arrived */ | |
224 | if (channel->efx->last_irq_cpu >= 0) { | |
225 | EFX_ERR(channel->efx, "channel %d saw interrupt on CPU%d " | |
226 | "during event queue test\n", channel->channel, | |
227 | raw_smp_processor_id()); | |
228 | tests->eventq_int[channel->channel] = 1; | |
229 | } | |
230 | ||
231 | /* Check to see if event was received even if interrupt wasn't */ | |
232 | efx_process_channel_now(channel); | |
233 | if (channel->eventq_magic == magic) { | |
234 | EFX_ERR(channel->efx, "channel %d event was generated, but " | |
235 | "failed to trigger an interrupt\n", channel->channel); | |
236 | tests->eventq_dma[channel->channel] = 1; | |
237 | } | |
238 | ||
239 | return -ETIMEDOUT; | |
240 | eventq_ok: | |
241 | EFX_LOG(channel->efx, "channel %d event queue passed\n", | |
242 | channel->channel); | |
243 | tests->eventq_dma[channel->channel] = 1; | |
244 | tests->eventq_int[channel->channel] = 1; | |
245 | tests->eventq_poll[channel->channel] = 1; | |
246 | return 0; | |
247 | } | |
248 | ||
1796721a BH |
249 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
250 | unsigned flags) | |
3273c2e8 | 251 | { |
8c8661e4 | 252 | int rc; |
3273c2e8 | 253 | |
1796721a | 254 | if (!efx->phy_op->run_tests) |
3273c2e8 | 255 | return 0; |
3273c2e8 | 256 | |
1796721a BH |
257 | EFX_BUG_ON_PARANOID(efx->phy_op->num_tests == 0 || |
258 | efx->phy_op->num_tests > EFX_MAX_PHY_TESTS); | |
259 | ||
8c8661e4 | 260 | mutex_lock(&efx->mac_lock); |
1796721a | 261 | rc = efx->phy_op->run_tests(efx, tests->phy, flags); |
8c8661e4 | 262 | mutex_unlock(&efx->mac_lock); |
8c8661e4 | 263 | return rc; |
3273c2e8 BH |
264 | } |
265 | ||
266 | /************************************************************************** | |
267 | * | |
268 | * Loopback testing | |
269 | * NB Only one loopback test can be executing concurrently. | |
270 | * | |
271 | **************************************************************************/ | |
272 | ||
273 | /* Loopback test RX callback | |
274 | * This is called for each received packet during loopback testing. | |
275 | */ | |
276 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
277 | const char *buf_ptr, int pkt_len) | |
278 | { | |
8c8661e4 | 279 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
280 | struct efx_loopback_payload *received; |
281 | struct efx_loopback_payload *payload; | |
282 | ||
283 | BUG_ON(!buf_ptr); | |
284 | ||
285 | /* If we are just flushing, then drop the packet */ | |
286 | if ((state == NULL) || state->flush) | |
287 | return; | |
288 | ||
289 | payload = &state->payload; | |
8c8661e4 | 290 | |
d3208b5e | 291 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 292 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
293 | if (state->offload_csum) |
294 | received->ip.check = payload->ip.check; | |
295 | ||
3273c2e8 BH |
296 | /* Check that header exists */ |
297 | if (pkt_len < sizeof(received->header)) { | |
298 | EFX_ERR(efx, "saw runt RX packet (length %d) in %s loopback " | |
299 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
300 | goto err; | |
301 | } | |
302 | ||
303 | /* Check that the ethernet header exists */ | |
304 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
305 | EFX_ERR(efx, "saw non-loopback RX packet in %s loopback test\n", | |
306 | LOOPBACK_MODE(efx)); | |
307 | goto err; | |
308 | } | |
309 | ||
310 | /* Check packet length */ | |
311 | if (pkt_len != sizeof(*payload)) { | |
312 | EFX_ERR(efx, "saw incorrect RX packet length %d (wanted %d) in " | |
313 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
314 | LOOPBACK_MODE(efx)); | |
315 | goto err; | |
316 | } | |
317 | ||
318 | /* Check that IP header matches */ | |
319 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
320 | EFX_ERR(efx, "saw corrupted IP header in %s loopback test\n", | |
321 | LOOPBACK_MODE(efx)); | |
322 | goto err; | |
323 | } | |
324 | ||
325 | /* Check that msg and padding matches */ | |
326 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
327 | EFX_ERR(efx, "saw corrupted RX packet in %s loopback test\n", | |
328 | LOOPBACK_MODE(efx)); | |
329 | goto err; | |
330 | } | |
331 | ||
332 | /* Check that iteration matches */ | |
333 | if (received->iteration != payload->iteration) { | |
334 | EFX_ERR(efx, "saw RX packet from iteration %d (wanted %d) in " | |
335 | "%s loopback test\n", ntohs(received->iteration), | |
336 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
337 | goto err; | |
338 | } | |
339 | ||
340 | /* Increase correct RX count */ | |
341 | EFX_TRACE(efx, "got loopback RX in %s loopback test\n", | |
342 | LOOPBACK_MODE(efx)); | |
343 | ||
344 | atomic_inc(&state->rx_good); | |
345 | return; | |
346 | ||
347 | err: | |
348 | #ifdef EFX_ENABLE_DEBUG | |
349 | if (atomic_read(&state->rx_bad) == 0) { | |
350 | EFX_ERR(efx, "received packet:\n"); | |
351 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, | |
352 | buf_ptr, pkt_len, 0); | |
353 | EFX_ERR(efx, "expected packet:\n"); | |
354 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, | |
355 | &state->payload, sizeof(state->payload), 0); | |
356 | } | |
357 | #endif | |
358 | atomic_inc(&state->rx_bad); | |
359 | } | |
360 | ||
361 | /* Initialise an efx_selftest_state for a new iteration */ | |
362 | static void efx_iterate_state(struct efx_nic *efx) | |
363 | { | |
8c8661e4 | 364 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
365 | struct net_device *net_dev = efx->net_dev; |
366 | struct efx_loopback_payload *payload = &state->payload; | |
367 | ||
368 | /* Initialise the layerII header */ | |
369 | memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN); | |
370 | memcpy(&payload->header.h_source, &payload_source, ETH_ALEN); | |
371 | payload->header.h_proto = htons(ETH_P_IP); | |
372 | ||
373 | /* saddr set later and used as incrementing count */ | |
374 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
375 | payload->ip.ihl = 5; | |
376 | payload->ip.check = htons(0xdead); | |
377 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); | |
378 | payload->ip.version = IPVERSION; | |
379 | payload->ip.protocol = IPPROTO_UDP; | |
380 | ||
381 | /* Initialise udp header */ | |
382 | payload->udp.source = 0; | |
383 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
384 | sizeof(struct iphdr)); | |
385 | payload->udp.check = 0; /* checksum ignored */ | |
386 | ||
387 | /* Fill out payload */ | |
388 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
389 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
390 | ||
391 | /* Fill out remaining state members */ | |
392 | atomic_set(&state->rx_good, 0); | |
393 | atomic_set(&state->rx_bad, 0); | |
394 | smp_wmb(); | |
395 | } | |
396 | ||
b9aafb0e | 397 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
398 | { |
399 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 400 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
401 | struct efx_loopback_payload *payload; |
402 | struct sk_buff *skb; | |
61357325 SH |
403 | int i; |
404 | netdev_tx_t rc; | |
3273c2e8 BH |
405 | |
406 | /* Transmit N copies of buffer */ | |
407 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 408 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
409 | * transmit completion counting */ |
410 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
411 | if (!skb) | |
412 | return -ENOMEM; | |
413 | state->skbs[i] = skb; | |
414 | skb_get(skb); | |
415 | ||
416 | /* Copy the payload in, incrementing the source address to | |
417 | * exercise the rss vectors */ | |
418 | payload = ((struct efx_loopback_payload *) | |
419 | skb_put(skb, sizeof(state->payload))); | |
420 | memcpy(payload, &state->payload, sizeof(state->payload)); | |
421 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
422 | ||
423 | /* Ensure everything we've written is visible to the | |
424 | * interrupt handler. */ | |
425 | smp_wmb(); | |
426 | ||
55668611 | 427 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
428 | netif_tx_lock_bh(efx->net_dev); |
429 | rc = efx_xmit(efx, tx_queue, skb); | |
55668611 | 430 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
431 | netif_tx_unlock_bh(efx->net_dev); |
432 | ||
433 | if (rc != NETDEV_TX_OK) { | |
434 | EFX_ERR(efx, "TX queue %d could not transmit packet %d " | |
435 | "of %d in %s loopback test\n", tx_queue->queue, | |
436 | i + 1, state->packet_count, LOOPBACK_MODE(efx)); | |
437 | ||
438 | /* Defer cleaning up the other skbs for the caller */ | |
439 | kfree_skb(skb); | |
440 | return -EPIPE; | |
441 | } | |
28679751 | 442 | efx->net_dev->trans_start = jiffies; |
3273c2e8 BH |
443 | } |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
b9aafb0e BH |
448 | static int efx_poll_loopback(struct efx_nic *efx) |
449 | { | |
8c8661e4 | 450 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e BH |
451 | struct efx_channel *channel; |
452 | ||
453 | /* NAPI polling is not enabled, so process channels | |
454 | * synchronously */ | |
64ee3120 | 455 | efx_for_each_channel(channel, efx) { |
b9aafb0e BH |
456 | if (channel->work_pending) |
457 | efx_process_channel_now(channel); | |
458 | } | |
459 | return atomic_read(&state->rx_good) == state->packet_count; | |
460 | } | |
461 | ||
462 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
463 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
464 | { |
465 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 466 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
467 | struct sk_buff *skb; |
468 | int tx_done = 0, rx_good, rx_bad; | |
469 | int i, rc = 0; | |
470 | ||
55668611 | 471 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
472 | netif_tx_lock_bh(efx->net_dev); |
473 | ||
474 | /* Count the number of tx completions, and decrement the refcnt. Any | |
475 | * skbs not already completed will be free'd when the queue is flushed */ | |
476 | for (i=0; i < state->packet_count; i++) { | |
477 | skb = state->skbs[i]; | |
478 | if (skb && !skb_shared(skb)) | |
479 | ++tx_done; | |
480 | dev_kfree_skb_any(skb); | |
481 | } | |
482 | ||
55668611 | 483 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
484 | netif_tx_unlock_bh(efx->net_dev); |
485 | ||
486 | /* Check TX completion and received packet counts */ | |
487 | rx_good = atomic_read(&state->rx_good); | |
488 | rx_bad = atomic_read(&state->rx_bad); | |
489 | if (tx_done != state->packet_count) { | |
490 | /* Don't free the skbs; they will be picked up on TX | |
491 | * overflow or channel teardown. | |
492 | */ | |
493 | EFX_ERR(efx, "TX queue %d saw only %d out of an expected %d " | |
494 | "TX completion events in %s loopback test\n", | |
495 | tx_queue->queue, tx_done, state->packet_count, | |
496 | LOOPBACK_MODE(efx)); | |
497 | rc = -ETIMEDOUT; | |
498 | /* Allow to fall through so we see the RX errors as well */ | |
499 | } | |
500 | ||
501 | /* We may always be up to a flush away from our desired packet total */ | |
502 | if (rx_good != state->packet_count) { | |
503 | EFX_LOG(efx, "TX queue %d saw only %d out of an expected %d " | |
504 | "received packets in %s loopback test\n", | |
505 | tx_queue->queue, rx_good, state->packet_count, | |
506 | LOOPBACK_MODE(efx)); | |
507 | rc = -ETIMEDOUT; | |
508 | /* Fall through */ | |
509 | } | |
510 | ||
511 | /* Update loopback test structure */ | |
512 | lb_tests->tx_sent[tx_queue->queue] += state->packet_count; | |
513 | lb_tests->tx_done[tx_queue->queue] += tx_done; | |
514 | lb_tests->rx_good += rx_good; | |
515 | lb_tests->rx_bad += rx_bad; | |
516 | ||
517 | return rc; | |
518 | } | |
519 | ||
520 | static int | |
521 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
522 | struct efx_loopback_self_tests *lb_tests) | |
523 | { | |
524 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 525 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 526 | int i, begin_rc, end_rc; |
3273c2e8 | 527 | |
8c8661e4 | 528 | for (i = 0; i < 3; i++) { |
3273c2e8 BH |
529 | /* Determine how many packets to send */ |
530 | state->packet_count = (efx->type->txd_ring_mask + 1) / 3; | |
531 | state->packet_count = min(1 << (i << 2), state->packet_count); | |
532 | state->skbs = kzalloc(sizeof(state->skbs[0]) * | |
533 | state->packet_count, GFP_KERNEL); | |
9b7bfc4c BH |
534 | if (!state->skbs) |
535 | return -ENOMEM; | |
dc8cfa55 | 536 | state->flush = false; |
3273c2e8 BH |
537 | |
538 | EFX_LOG(efx, "TX queue %d testing %s loopback with %d " | |
539 | "packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
540 | state->packet_count); | |
541 | ||
542 | efx_iterate_state(efx); | |
b9aafb0e BH |
543 | begin_rc = efx_begin_loopback(tx_queue); |
544 | ||
545 | /* This will normally complete very quickly, but be | |
546 | * prepared to wait up to 100 ms. */ | |
547 | msleep(1); | |
548 | if (!efx_poll_loopback(efx)) { | |
549 | msleep(100); | |
550 | efx_poll_loopback(efx); | |
3273c2e8 BH |
551 | } |
552 | ||
b9aafb0e | 553 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
554 | kfree(state->skbs); |
555 | ||
b9aafb0e | 556 | if (begin_rc || end_rc) { |
3273c2e8 BH |
557 | /* Wait a while to ensure there are no packets |
558 | * floating around after a failure. */ | |
559 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 560 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
561 | } |
562 | } | |
563 | ||
564 | EFX_LOG(efx, "TX queue %d passed %s loopback test with a burst length " | |
565 | "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
566 | state->packet_count); | |
567 | ||
a0c2c190 | 568 | return 0; |
3273c2e8 BH |
569 | } |
570 | ||
a5692e49 | 571 | static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
3273c2e8 BH |
572 | unsigned int loopback_modes) |
573 | { | |
8c8661e4 BH |
574 | enum efx_loopback_mode mode; |
575 | struct efx_loopback_state *state; | |
3273c2e8 | 576 | struct efx_tx_queue *tx_queue; |
dc8cfa55 | 577 | bool link_up; |
8c8661e4 | 578 | int count, rc = 0; |
3273c2e8 | 579 | |
8c8661e4 BH |
580 | /* Set the port loopback_selftest member. From this point on |
581 | * all received packets will be dropped. Mark the state as | |
582 | * "flushing" so all inflight packets are dropped */ | |
583 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
584 | if (state == NULL) | |
585 | return -ENOMEM; | |
586 | BUG_ON(efx->loopback_selftest); | |
587 | state->flush = true; | |
588 | efx->loopback_selftest = state; | |
3273c2e8 BH |
589 | |
590 | /* Test all supported loopback modes */ | |
8c8661e4 | 591 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
592 | if (!(loopback_modes & (1 << mode))) |
593 | continue; | |
594 | ||
595 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 596 | state->flush = true; |
3273c2e8 BH |
597 | efx->loopback_mode = mode; |
598 | efx_reconfigure_port(efx); | |
599 | ||
766ca0fa BH |
600 | /* Wait for the PHY to signal the link is up. Interrupts |
601 | * are enabled for PHY's using LASI, otherwise we poll() | |
602 | * quickly */ | |
3273c2e8 BH |
603 | count = 0; |
604 | do { | |
605 | struct efx_channel *channel = &efx->channel[0]; | |
606 | ||
766ca0fa | 607 | efx->phy_op->poll(efx); |
3273c2e8 BH |
608 | schedule_timeout_uninterruptible(HZ / 10); |
609 | if (channel->work_pending) | |
610 | efx_process_channel_now(channel); | |
611 | /* Wait for PHY events to be processed */ | |
612 | flush_workqueue(efx->workqueue); | |
613 | rmb(); | |
614 | ||
177dfcd8 BH |
615 | /* We need both the phy and xaui links to be ok. |
616 | * rather than relying on the falcon_xmac irq/poll | |
617 | * regime, just poll xaui directly */ | |
3273c2e8 | 618 | link_up = efx->link_up; |
177dfcd8 BH |
619 | if (link_up && EFX_IS10G(efx) && |
620 | !falcon_xaui_link_ok(efx)) | |
8c8661e4 | 621 | link_up = false; |
3273c2e8 BH |
622 | |
623 | } while ((++count < 20) && !link_up); | |
624 | ||
625 | /* The link should now be up. If it isn't, there is no point | |
626 | * in attempting a loopback test */ | |
627 | if (!link_up) { | |
628 | EFX_ERR(efx, "loopback %s never came up\n", | |
629 | LOOPBACK_MODE(efx)); | |
630 | rc = -EIO; | |
631 | goto out; | |
632 | } | |
633 | ||
634 | EFX_LOG(efx, "link came up in %s loopback in %d iterations\n", | |
635 | LOOPBACK_MODE(efx), count); | |
636 | ||
637 | /* Test every TX queue */ | |
638 | efx_for_each_tx_queue(tx_queue, efx) { | |
60ac1065 BH |
639 | state->offload_csum = (tx_queue->queue == |
640 | EFX_TX_QUEUE_OFFLOAD_CSUM); | |
f8ea0b67 BH |
641 | rc = efx_test_loopback(tx_queue, |
642 | &tests->loopback[mode]); | |
3273c2e8 BH |
643 | if (rc) |
644 | goto out; | |
645 | } | |
646 | } | |
647 | ||
648 | out: | |
8c8661e4 | 649 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 650 | state->flush = true; |
8c8661e4 BH |
651 | efx->loopback_selftest = NULL; |
652 | wmb(); | |
653 | kfree(state); | |
3273c2e8 BH |
654 | |
655 | return rc; | |
656 | } | |
657 | ||
658 | /************************************************************************** | |
659 | * | |
2ef3068e | 660 | * Entry point |
3273c2e8 BH |
661 | * |
662 | *************************************************************************/ | |
663 | ||
2ef3068e BH |
664 | int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
665 | unsigned flags) | |
3273c2e8 | 666 | { |
2ef3068e BH |
667 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
668 | int phy_mode = efx->phy_mode; | |
4b988280 | 669 | enum reset_type reset_method = RESET_TYPE_INVISIBLE; |
2ef3068e | 670 | struct ethtool_cmd ecmd; |
3273c2e8 | 671 | struct efx_channel *channel; |
2ef3068e BH |
672 | int rc_test = 0, rc_reset = 0, rc; |
673 | ||
674 | /* Online (i.e. non-disruptive) testing | |
675 | * This checks interrupt generation, event delivery and PHY presence. */ | |
8c8661e4 | 676 | |
68e7f45e | 677 | rc = efx_test_mdio(efx, tests); |
2ef3068e BH |
678 | if (rc && !rc_test) |
679 | rc_test = rc; | |
8c8661e4 BH |
680 | |
681 | rc = efx_test_nvram(efx, tests); | |
2ef3068e BH |
682 | if (rc && !rc_test) |
683 | rc_test = rc; | |
3273c2e8 | 684 | |
f8ea0b67 | 685 | rc = efx_test_interrupts(efx, tests); |
2ef3068e BH |
686 | if (rc && !rc_test) |
687 | rc_test = rc; | |
8c8661e4 | 688 | |
3273c2e8 | 689 | efx_for_each_channel(channel, efx) { |
64ee3120 | 690 | rc = efx_test_eventq_irq(channel, tests); |
2ef3068e BH |
691 | if (rc && !rc_test) |
692 | rc_test = rc; | |
3273c2e8 | 693 | } |
8c8661e4 | 694 | |
2ef3068e BH |
695 | if (rc_test) |
696 | return rc_test; | |
3273c2e8 | 697 | |
2ef3068e | 698 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 699 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
700 | |
701 | /* Offline (i.e. disruptive) testing | |
702 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 BH |
703 | |
704 | /* force the carrier state off so the kernel doesn't transmit during | |
705 | * the loopback test, and the watchdog timeout doesn't fire. Also put | |
706 | * falcon into loopback for the register test. | |
707 | */ | |
708 | mutex_lock(&efx->mac_lock); | |
709 | efx->port_inhibited = true; | |
6f158d5f BH |
710 | if (efx->loopback_modes) { |
711 | /* We need the 312 clock from the PHY to test the XMAC | |
712 | * registers, so move into XGMII loopback if available */ | |
713 | if (efx->loopback_modes & (1 << LOOPBACK_XGMII)) | |
714 | efx->loopback_mode = LOOPBACK_XGMII; | |
715 | else | |
716 | efx->loopback_mode = __ffs(efx->loopback_modes); | |
717 | } | |
718 | ||
8c8661e4 BH |
719 | __efx_reconfigure_port(efx); |
720 | mutex_unlock(&efx->mac_lock); | |
721 | ||
722 | /* free up all consumers of SRAM (including all the queues) */ | |
4b988280 | 723 | efx_reset_down(efx, reset_method, &ecmd); |
8c8661e4 BH |
724 | |
725 | rc = efx_test_chip(efx, tests); | |
2ef3068e BH |
726 | if (rc && !rc_test) |
727 | rc_test = rc; | |
8c8661e4 BH |
728 | |
729 | /* reset the chip to recover from the register test */ | |
4b988280 | 730 | rc_reset = falcon_reset_hw(efx, reset_method); |
8c8661e4 | 731 | |
a5692e49 BH |
732 | /* Ensure that the phy is powered and out of loopback |
733 | * for the bist and loopback tests */ | |
734 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; | |
8c8661e4 | 735 | efx->loopback_mode = LOOPBACK_NONE; |
3273c2e8 | 736 | |
4b988280 | 737 | rc = efx_reset_up(efx, reset_method, &ecmd, rc_reset == 0); |
2ef3068e BH |
738 | if (rc && !rc_reset) |
739 | rc_reset = rc; | |
740 | ||
741 | if (rc_reset) { | |
8c8661e4 BH |
742 | EFX_ERR(efx, "Unable to recover from chip test\n"); |
743 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
2ef3068e | 744 | return rc_reset; |
8c8661e4 | 745 | } |
3273c2e8 | 746 | |
1796721a | 747 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
748 | if (rc && !rc_test) |
749 | rc_test = rc; | |
3273c2e8 | 750 | |
2ef3068e BH |
751 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
752 | if (rc && !rc_test) | |
753 | rc_test = rc; | |
3273c2e8 | 754 | |
8c8661e4 BH |
755 | /* restore the PHY to the previous state */ |
756 | efx->loopback_mode = loopback_mode; | |
757 | efx->phy_mode = phy_mode; | |
758 | efx->port_inhibited = false; | |
759 | efx_ethtool_set_settings(efx->net_dev, &ecmd); | |
760 | ||
2ef3068e | 761 | return rc_test; |
3273c2e8 BH |
762 | } |
763 |