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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" | |
3273c2e8 | 27 | #include "workarounds.h" |
8c8661e4 | 28 | #include "spi.h" |
12d00cad | 29 | #include "io.h" |
8c8661e4 | 30 | #include "mdio_10g.h" |
3273c2e8 BH |
31 | |
32 | /* | |
33 | * Loopback test packet structure | |
34 | * | |
35 | * The self-test should stress every RSS vector, and unfortunately | |
36 | * Falcon only performs RSS on TCP/UDP packets. | |
37 | */ | |
38 | struct efx_loopback_payload { | |
39 | struct ethhdr header; | |
40 | struct iphdr ip; | |
41 | struct udphdr udp; | |
42 | __be16 iteration; | |
43 | const char msg[64]; | |
44 | } __attribute__ ((packed)); | |
45 | ||
46 | /* Loopback test source MAC address */ | |
47 | static const unsigned char payload_source[ETH_ALEN] = { | |
48 | 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b, | |
49 | }; | |
50 | ||
51 | static const char *payload_msg = | |
52 | "Hello world! This is an Efx loopback test in progress!"; | |
53 | ||
54 | /** | |
8c8661e4 | 55 | * efx_loopback_state - persistent state during a loopback selftest |
3273c2e8 BH |
56 | * @flush: Drop all packets in efx_loopback_rx_packet |
57 | * @packet_count: Number of packets being used in this test | |
58 | * @skbs: An array of skbs transmitted | |
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; | |
60ac1065 BH |
67 | |
68 | /* Checksums are being offloaded */ | |
dc8cfa55 | 69 | bool offload_csum; |
60ac1065 | 70 | |
3273c2e8 BH |
71 | atomic_t rx_good; |
72 | atomic_t rx_bad; | |
73 | struct efx_loopback_payload payload; | |
74 | }; | |
75 | ||
76 | /************************************************************************** | |
77 | * | |
8c8661e4 | 78 | * MII, NVRAM and register tests |
3273c2e8 BH |
79 | * |
80 | **************************************************************************/ | |
81 | ||
68e7f45e | 82 | static int efx_test_mdio(struct efx_nic *efx, struct efx_self_tests *tests) |
8c8661e4 BH |
83 | { |
84 | int rc = 0; | |
68e7f45e | 85 | int devad = __ffs(efx->mdio.mmds); |
8c8661e4 | 86 | u16 physid1, physid2; |
8c8661e4 BH |
87 | |
88 | if (efx->phy_type == PHY_TYPE_NONE) | |
89 | return 0; | |
90 | ||
91 | mutex_lock(&efx->mac_lock); | |
68e7f45e | 92 | tests->mdio = -1; |
8c8661e4 | 93 | |
68e7f45e BH |
94 | physid1 = efx_mdio_read(efx, devad, MDIO_DEVID1); |
95 | physid2 = efx_mdio_read(efx, devad, MDIO_DEVID2); | |
8c8661e4 BH |
96 | |
97 | if ((physid1 == 0x0000) || (physid1 == 0xffff) || | |
98 | (physid2 == 0x0000) || (physid2 == 0xffff)) { | |
68e7f45e BH |
99 | EFX_ERR(efx, "no MDIO PHY present with ID %d\n", |
100 | efx->mdio.prtad); | |
8c8661e4 BH |
101 | rc = -EINVAL; |
102 | goto out; | |
103 | } | |
104 | ||
177dfcd8 | 105 | if (EFX_IS10G(efx)) { |
68e7f45e | 106 | rc = efx_mdio_check_mmds(efx, efx->phy_op->mmds, 0); |
177dfcd8 BH |
107 | if (rc) |
108 | goto out; | |
109 | } | |
8c8661e4 BH |
110 | |
111 | out: | |
112 | mutex_unlock(&efx->mac_lock); | |
68e7f45e | 113 | tests->mdio = rc ? -1 : 1; |
8c8661e4 BH |
114 | return rc; |
115 | } | |
116 | ||
117 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
118 | { | |
119 | int rc; | |
120 | ||
121 | rc = falcon_read_nvram(efx, NULL); | |
122 | tests->nvram = rc ? -1 : 1; | |
123 | return rc; | |
124 | } | |
125 | ||
126 | static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests) | |
127 | { | |
128 | int rc; | |
129 | ||
130 | /* Not supported on A-series silicon */ | |
131 | if (falcon_rev(efx) < FALCON_REV_B0) | |
132 | return 0; | |
133 | ||
134 | rc = falcon_test_registers(efx); | |
135 | tests->registers = rc ? -1 : 1; | |
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 | ||
167 | falcon_generate_interrupt(efx); | |
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: | |
179 | EFX_LOG(efx, "test interrupt (mode %d) seen on CPU%d\n", | |
180 | efx->interrupt_mode, efx->last_irq_cpu); | |
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 | ||
205 | falcon_generate_test_event(channel, magic); | |
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 | |
1796721a BH |
256 | EFX_BUG_ON_PARANOID(efx->phy_op->num_tests == 0 || |
257 | efx->phy_op->num_tests > EFX_MAX_PHY_TESTS); | |
258 | ||
8c8661e4 | 259 | mutex_lock(&efx->mac_lock); |
1796721a | 260 | rc = efx->phy_op->run_tests(efx, tests->phy, flags); |
8c8661e4 | 261 | mutex_unlock(&efx->mac_lock); |
8c8661e4 | 262 | return rc; |
3273c2e8 BH |
263 | } |
264 | ||
265 | /************************************************************************** | |
266 | * | |
267 | * Loopback testing | |
268 | * NB Only one loopback test can be executing concurrently. | |
269 | * | |
270 | **************************************************************************/ | |
271 | ||
272 | /* Loopback test RX callback | |
273 | * This is called for each received packet during loopback testing. | |
274 | */ | |
275 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
276 | const char *buf_ptr, int pkt_len) | |
277 | { | |
8c8661e4 | 278 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
279 | struct efx_loopback_payload *received; |
280 | struct efx_loopback_payload *payload; | |
281 | ||
282 | BUG_ON(!buf_ptr); | |
283 | ||
284 | /* If we are just flushing, then drop the packet */ | |
285 | if ((state == NULL) || state->flush) | |
286 | return; | |
287 | ||
288 | payload = &state->payload; | |
8c8661e4 | 289 | |
d3208b5e | 290 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 291 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
292 | if (state->offload_csum) |
293 | received->ip.check = payload->ip.check; | |
294 | ||
3273c2e8 BH |
295 | /* Check that header exists */ |
296 | if (pkt_len < sizeof(received->header)) { | |
297 | EFX_ERR(efx, "saw runt RX packet (length %d) in %s loopback " | |
298 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
299 | goto err; | |
300 | } | |
301 | ||
302 | /* Check that the ethernet header exists */ | |
303 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
304 | EFX_ERR(efx, "saw non-loopback RX packet in %s loopback test\n", | |
305 | LOOPBACK_MODE(efx)); | |
306 | goto err; | |
307 | } | |
308 | ||
309 | /* Check packet length */ | |
310 | if (pkt_len != sizeof(*payload)) { | |
311 | EFX_ERR(efx, "saw incorrect RX packet length %d (wanted %d) in " | |
312 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
313 | LOOPBACK_MODE(efx)); | |
314 | goto err; | |
315 | } | |
316 | ||
317 | /* Check that IP header matches */ | |
318 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
319 | EFX_ERR(efx, "saw corrupted IP header in %s loopback test\n", | |
320 | LOOPBACK_MODE(efx)); | |
321 | goto err; | |
322 | } | |
323 | ||
324 | /* Check that msg and padding matches */ | |
325 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
326 | EFX_ERR(efx, "saw corrupted RX packet in %s loopback test\n", | |
327 | LOOPBACK_MODE(efx)); | |
328 | goto err; | |
329 | } | |
330 | ||
331 | /* Check that iteration matches */ | |
332 | if (received->iteration != payload->iteration) { | |
333 | EFX_ERR(efx, "saw RX packet from iteration %d (wanted %d) in " | |
334 | "%s loopback test\n", ntohs(received->iteration), | |
335 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
336 | goto err; | |
337 | } | |
338 | ||
339 | /* Increase correct RX count */ | |
340 | EFX_TRACE(efx, "got loopback RX in %s loopback test\n", | |
341 | LOOPBACK_MODE(efx)); | |
342 | ||
343 | atomic_inc(&state->rx_good); | |
344 | return; | |
345 | ||
346 | err: | |
347 | #ifdef EFX_ENABLE_DEBUG | |
348 | if (atomic_read(&state->rx_bad) == 0) { | |
349 | EFX_ERR(efx, "received packet:\n"); | |
350 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, | |
351 | buf_ptr, pkt_len, 0); | |
352 | EFX_ERR(efx, "expected packet:\n"); | |
353 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, | |
354 | &state->payload, sizeof(state->payload), 0); | |
355 | } | |
356 | #endif | |
357 | atomic_inc(&state->rx_bad); | |
358 | } | |
359 | ||
360 | /* Initialise an efx_selftest_state for a new iteration */ | |
361 | static void efx_iterate_state(struct efx_nic *efx) | |
362 | { | |
8c8661e4 | 363 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
364 | struct net_device *net_dev = efx->net_dev; |
365 | struct efx_loopback_payload *payload = &state->payload; | |
366 | ||
367 | /* Initialise the layerII header */ | |
368 | memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN); | |
369 | memcpy(&payload->header.h_source, &payload_source, ETH_ALEN); | |
370 | payload->header.h_proto = htons(ETH_P_IP); | |
371 | ||
372 | /* saddr set later and used as incrementing count */ | |
373 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
374 | payload->ip.ihl = 5; | |
375 | payload->ip.check = htons(0xdead); | |
376 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); | |
377 | payload->ip.version = IPVERSION; | |
378 | payload->ip.protocol = IPPROTO_UDP; | |
379 | ||
380 | /* Initialise udp header */ | |
381 | payload->udp.source = 0; | |
382 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
383 | sizeof(struct iphdr)); | |
384 | payload->udp.check = 0; /* checksum ignored */ | |
385 | ||
386 | /* Fill out payload */ | |
387 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
388 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
389 | ||
390 | /* Fill out remaining state members */ | |
391 | atomic_set(&state->rx_good, 0); | |
392 | atomic_set(&state->rx_bad, 0); | |
393 | smp_wmb(); | |
394 | } | |
395 | ||
b9aafb0e | 396 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
397 | { |
398 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 399 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
400 | struct efx_loopback_payload *payload; |
401 | struct sk_buff *skb; | |
61357325 SH |
402 | int i; |
403 | netdev_tx_t rc; | |
3273c2e8 BH |
404 | |
405 | /* Transmit N copies of buffer */ | |
406 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 407 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
408 | * transmit completion counting */ |
409 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
410 | if (!skb) | |
411 | return -ENOMEM; | |
412 | state->skbs[i] = skb; | |
413 | skb_get(skb); | |
414 | ||
415 | /* Copy the payload in, incrementing the source address to | |
416 | * exercise the rss vectors */ | |
417 | payload = ((struct efx_loopback_payload *) | |
418 | skb_put(skb, sizeof(state->payload))); | |
419 | memcpy(payload, &state->payload, sizeof(state->payload)); | |
420 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
421 | ||
422 | /* Ensure everything we've written is visible to the | |
423 | * interrupt handler. */ | |
424 | smp_wmb(); | |
425 | ||
55668611 | 426 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
427 | netif_tx_lock_bh(efx->net_dev); |
428 | rc = efx_xmit(efx, tx_queue, skb); | |
55668611 | 429 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
430 | netif_tx_unlock_bh(efx->net_dev); |
431 | ||
432 | if (rc != NETDEV_TX_OK) { | |
433 | EFX_ERR(efx, "TX queue %d could not transmit packet %d " | |
434 | "of %d in %s loopback test\n", tx_queue->queue, | |
435 | i + 1, state->packet_count, LOOPBACK_MODE(efx)); | |
436 | ||
437 | /* Defer cleaning up the other skbs for the caller */ | |
438 | kfree_skb(skb); | |
439 | return -EPIPE; | |
440 | } | |
28679751 | 441 | efx->net_dev->trans_start = jiffies; |
3273c2e8 BH |
442 | } |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
b9aafb0e BH |
447 | static int efx_poll_loopback(struct efx_nic *efx) |
448 | { | |
8c8661e4 | 449 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e BH |
450 | struct efx_channel *channel; |
451 | ||
452 | /* NAPI polling is not enabled, so process channels | |
453 | * synchronously */ | |
64ee3120 | 454 | efx_for_each_channel(channel, efx) { |
b9aafb0e BH |
455 | if (channel->work_pending) |
456 | efx_process_channel_now(channel); | |
457 | } | |
458 | return atomic_read(&state->rx_good) == state->packet_count; | |
459 | } | |
460 | ||
461 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
462 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
463 | { |
464 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 465 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
466 | struct sk_buff *skb; |
467 | int tx_done = 0, rx_good, rx_bad; | |
468 | int i, rc = 0; | |
469 | ||
55668611 | 470 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
471 | netif_tx_lock_bh(efx->net_dev); |
472 | ||
473 | /* Count the number of tx completions, and decrement the refcnt. Any | |
474 | * skbs not already completed will be free'd when the queue is flushed */ | |
475 | for (i=0; i < state->packet_count; i++) { | |
476 | skb = state->skbs[i]; | |
477 | if (skb && !skb_shared(skb)) | |
478 | ++tx_done; | |
479 | dev_kfree_skb_any(skb); | |
480 | } | |
481 | ||
55668611 | 482 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
483 | netif_tx_unlock_bh(efx->net_dev); |
484 | ||
485 | /* Check TX completion and received packet counts */ | |
486 | rx_good = atomic_read(&state->rx_good); | |
487 | rx_bad = atomic_read(&state->rx_bad); | |
488 | if (tx_done != state->packet_count) { | |
489 | /* Don't free the skbs; they will be picked up on TX | |
490 | * overflow or channel teardown. | |
491 | */ | |
492 | EFX_ERR(efx, "TX queue %d saw only %d out of an expected %d " | |
493 | "TX completion events in %s loopback test\n", | |
494 | tx_queue->queue, tx_done, state->packet_count, | |
495 | LOOPBACK_MODE(efx)); | |
496 | rc = -ETIMEDOUT; | |
497 | /* Allow to fall through so we see the RX errors as well */ | |
498 | } | |
499 | ||
500 | /* We may always be up to a flush away from our desired packet total */ | |
501 | if (rx_good != state->packet_count) { | |
502 | EFX_LOG(efx, "TX queue %d saw only %d out of an expected %d " | |
503 | "received packets in %s loopback test\n", | |
504 | tx_queue->queue, rx_good, state->packet_count, | |
505 | LOOPBACK_MODE(efx)); | |
506 | rc = -ETIMEDOUT; | |
507 | /* Fall through */ | |
508 | } | |
509 | ||
510 | /* Update loopback test structure */ | |
511 | lb_tests->tx_sent[tx_queue->queue] += state->packet_count; | |
512 | lb_tests->tx_done[tx_queue->queue] += tx_done; | |
513 | lb_tests->rx_good += rx_good; | |
514 | lb_tests->rx_bad += rx_bad; | |
515 | ||
516 | return rc; | |
517 | } | |
518 | ||
519 | static int | |
520 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
521 | struct efx_loopback_self_tests *lb_tests) | |
522 | { | |
523 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 524 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 525 | int i, begin_rc, end_rc; |
3273c2e8 | 526 | |
8c8661e4 | 527 | for (i = 0; i < 3; i++) { |
3273c2e8 BH |
528 | /* Determine how many packets to send */ |
529 | state->packet_count = (efx->type->txd_ring_mask + 1) / 3; | |
530 | state->packet_count = min(1 << (i << 2), state->packet_count); | |
531 | state->skbs = kzalloc(sizeof(state->skbs[0]) * | |
532 | state->packet_count, GFP_KERNEL); | |
9b7bfc4c BH |
533 | if (!state->skbs) |
534 | return -ENOMEM; | |
dc8cfa55 | 535 | state->flush = false; |
3273c2e8 BH |
536 | |
537 | EFX_LOG(efx, "TX queue %d testing %s loopback with %d " | |
538 | "packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
539 | state->packet_count); | |
540 | ||
541 | efx_iterate_state(efx); | |
b9aafb0e BH |
542 | begin_rc = efx_begin_loopback(tx_queue); |
543 | ||
544 | /* This will normally complete very quickly, but be | |
545 | * prepared to wait up to 100 ms. */ | |
546 | msleep(1); | |
547 | if (!efx_poll_loopback(efx)) { | |
548 | msleep(100); | |
549 | efx_poll_loopback(efx); | |
3273c2e8 BH |
550 | } |
551 | ||
b9aafb0e | 552 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
553 | kfree(state->skbs); |
554 | ||
b9aafb0e | 555 | if (begin_rc || end_rc) { |
3273c2e8 BH |
556 | /* Wait a while to ensure there are no packets |
557 | * floating around after a failure. */ | |
558 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 559 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
560 | } |
561 | } | |
562 | ||
563 | EFX_LOG(efx, "TX queue %d passed %s loopback test with a burst length " | |
564 | "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
565 | state->packet_count); | |
566 | ||
a0c2c190 | 567 | return 0; |
3273c2e8 BH |
568 | } |
569 | ||
a5692e49 | 570 | static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
3273c2e8 BH |
571 | unsigned int loopback_modes) |
572 | { | |
8c8661e4 BH |
573 | enum efx_loopback_mode mode; |
574 | struct efx_loopback_state *state; | |
3273c2e8 | 575 | struct efx_tx_queue *tx_queue; |
dc8cfa55 | 576 | bool link_up; |
8c8661e4 | 577 | int count, rc = 0; |
3273c2e8 | 578 | |
8c8661e4 BH |
579 | /* Set the port loopback_selftest member. From this point on |
580 | * all received packets will be dropped. Mark the state as | |
581 | * "flushing" so all inflight packets are dropped */ | |
582 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
583 | if (state == NULL) | |
584 | return -ENOMEM; | |
585 | BUG_ON(efx->loopback_selftest); | |
586 | state->flush = true; | |
587 | efx->loopback_selftest = state; | |
3273c2e8 BH |
588 | |
589 | /* Test all supported loopback modes */ | |
8c8661e4 | 590 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
591 | if (!(loopback_modes & (1 << mode))) |
592 | continue; | |
593 | ||
594 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 595 | state->flush = true; |
3273c2e8 BH |
596 | efx->loopback_mode = mode; |
597 | efx_reconfigure_port(efx); | |
598 | ||
766ca0fa BH |
599 | /* Wait for the PHY to signal the link is up. Interrupts |
600 | * are enabled for PHY's using LASI, otherwise we poll() | |
601 | * quickly */ | |
3273c2e8 BH |
602 | count = 0; |
603 | do { | |
604 | struct efx_channel *channel = &efx->channel[0]; | |
605 | ||
766ca0fa | 606 | efx->phy_op->poll(efx); |
3273c2e8 BH |
607 | schedule_timeout_uninterruptible(HZ / 10); |
608 | if (channel->work_pending) | |
609 | efx_process_channel_now(channel); | |
610 | /* Wait for PHY events to be processed */ | |
611 | flush_workqueue(efx->workqueue); | |
612 | rmb(); | |
613 | ||
177dfcd8 BH |
614 | /* We need both the phy and xaui links to be ok. |
615 | * rather than relying on the falcon_xmac irq/poll | |
616 | * regime, just poll xaui directly */ | |
3273c2e8 | 617 | link_up = efx->link_up; |
177dfcd8 BH |
618 | if (link_up && EFX_IS10G(efx) && |
619 | !falcon_xaui_link_ok(efx)) | |
8c8661e4 | 620 | link_up = false; |
3273c2e8 BH |
621 | |
622 | } while ((++count < 20) && !link_up); | |
623 | ||
624 | /* The link should now be up. If it isn't, there is no point | |
625 | * in attempting a loopback test */ | |
626 | if (!link_up) { | |
627 | EFX_ERR(efx, "loopback %s never came up\n", | |
628 | LOOPBACK_MODE(efx)); | |
629 | rc = -EIO; | |
630 | goto out; | |
631 | } | |
632 | ||
633 | EFX_LOG(efx, "link came up in %s loopback in %d iterations\n", | |
634 | LOOPBACK_MODE(efx), count); | |
635 | ||
636 | /* Test every TX queue */ | |
637 | efx_for_each_tx_queue(tx_queue, efx) { | |
60ac1065 BH |
638 | state->offload_csum = (tx_queue->queue == |
639 | EFX_TX_QUEUE_OFFLOAD_CSUM); | |
f8ea0b67 BH |
640 | rc = efx_test_loopback(tx_queue, |
641 | &tests->loopback[mode]); | |
3273c2e8 BH |
642 | if (rc) |
643 | goto out; | |
644 | } | |
645 | } | |
646 | ||
647 | out: | |
8c8661e4 | 648 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 649 | state->flush = true; |
8c8661e4 BH |
650 | efx->loopback_selftest = NULL; |
651 | wmb(); | |
652 | kfree(state); | |
3273c2e8 BH |
653 | |
654 | return rc; | |
655 | } | |
656 | ||
657 | /************************************************************************** | |
658 | * | |
2ef3068e | 659 | * Entry point |
3273c2e8 BH |
660 | * |
661 | *************************************************************************/ | |
662 | ||
2ef3068e BH |
663 | int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
664 | unsigned flags) | |
3273c2e8 | 665 | { |
2ef3068e BH |
666 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
667 | int phy_mode = efx->phy_mode; | |
4b988280 | 668 | enum reset_type reset_method = RESET_TYPE_INVISIBLE; |
2ef3068e | 669 | struct ethtool_cmd ecmd; |
3273c2e8 | 670 | struct efx_channel *channel; |
2ef3068e BH |
671 | int rc_test = 0, rc_reset = 0, rc; |
672 | ||
673 | /* Online (i.e. non-disruptive) testing | |
674 | * This checks interrupt generation, event delivery and PHY presence. */ | |
8c8661e4 | 675 | |
68e7f45e | 676 | rc = efx_test_mdio(efx, tests); |
2ef3068e BH |
677 | if (rc && !rc_test) |
678 | rc_test = rc; | |
8c8661e4 BH |
679 | |
680 | rc = efx_test_nvram(efx, tests); | |
2ef3068e BH |
681 | if (rc && !rc_test) |
682 | rc_test = rc; | |
3273c2e8 | 683 | |
f8ea0b67 | 684 | rc = efx_test_interrupts(efx, tests); |
2ef3068e BH |
685 | if (rc && !rc_test) |
686 | rc_test = rc; | |
8c8661e4 | 687 | |
3273c2e8 | 688 | efx_for_each_channel(channel, efx) { |
64ee3120 | 689 | rc = efx_test_eventq_irq(channel, tests); |
2ef3068e BH |
690 | if (rc && !rc_test) |
691 | rc_test = rc; | |
3273c2e8 | 692 | } |
8c8661e4 | 693 | |
2ef3068e BH |
694 | if (rc_test) |
695 | return rc_test; | |
3273c2e8 | 696 | |
2ef3068e | 697 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 698 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
699 | |
700 | /* Offline (i.e. disruptive) testing | |
701 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 BH |
702 | |
703 | /* force the carrier state off so the kernel doesn't transmit during | |
704 | * the loopback test, and the watchdog timeout doesn't fire. Also put | |
705 | * falcon into loopback for the register test. | |
706 | */ | |
707 | mutex_lock(&efx->mac_lock); | |
708 | efx->port_inhibited = true; | |
6f158d5f BH |
709 | if (efx->loopback_modes) { |
710 | /* We need the 312 clock from the PHY to test the XMAC | |
711 | * registers, so move into XGMII loopback if available */ | |
712 | if (efx->loopback_modes & (1 << LOOPBACK_XGMII)) | |
713 | efx->loopback_mode = LOOPBACK_XGMII; | |
714 | else | |
715 | efx->loopback_mode = __ffs(efx->loopback_modes); | |
716 | } | |
717 | ||
8c8661e4 BH |
718 | __efx_reconfigure_port(efx); |
719 | mutex_unlock(&efx->mac_lock); | |
720 | ||
721 | /* free up all consumers of SRAM (including all the queues) */ | |
4b988280 | 722 | efx_reset_down(efx, reset_method, &ecmd); |
8c8661e4 BH |
723 | |
724 | rc = efx_test_chip(efx, tests); | |
2ef3068e BH |
725 | if (rc && !rc_test) |
726 | rc_test = rc; | |
8c8661e4 BH |
727 | |
728 | /* reset the chip to recover from the register test */ | |
4b988280 | 729 | rc_reset = falcon_reset_hw(efx, reset_method); |
8c8661e4 | 730 | |
a5692e49 BH |
731 | /* Ensure that the phy is powered and out of loopback |
732 | * for the bist and loopback tests */ | |
733 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; | |
8c8661e4 | 734 | efx->loopback_mode = LOOPBACK_NONE; |
3273c2e8 | 735 | |
4b988280 | 736 | rc = efx_reset_up(efx, reset_method, &ecmd, rc_reset == 0); |
2ef3068e BH |
737 | if (rc && !rc_reset) |
738 | rc_reset = rc; | |
739 | ||
740 | if (rc_reset) { | |
8c8661e4 BH |
741 | EFX_ERR(efx, "Unable to recover from chip test\n"); |
742 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
2ef3068e | 743 | return rc_reset; |
8c8661e4 | 744 | } |
3273c2e8 | 745 | |
1796721a | 746 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
747 | if (rc && !rc_test) |
748 | rc_test = rc; | |
3273c2e8 | 749 | |
2ef3068e BH |
750 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
751 | if (rc && !rc_test) | |
752 | rc_test = rc; | |
3273c2e8 | 753 | |
8c8661e4 BH |
754 | /* restore the PHY to the previous state */ |
755 | efx->loopback_mode = loopback_mode; | |
756 | efx->phy_mode = phy_mode; | |
757 | efx->port_inhibited = false; | |
758 | efx_ethtool_set_settings(efx->net_dev, &ecmd); | |
759 | ||
2ef3068e | 760 | return rc_test; |
3273c2e8 BH |
761 | } |
762 |