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3273c2e8 BH |
1 | /**************************************************************************** |
2 | * Driver for Solarflare Solarstorm network controllers and boards | |
3 | * Copyright 2005-2006 Fen Systems Ltd. | |
906bb26c | 4 | * Copyright 2006-2009 Solarflare Communications Inc. |
3273c2e8 BH |
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> | |
5a0e3ad6 | 21 | #include <linux/slab.h> |
3273c2e8 BH |
22 | #include <asm/io.h> |
23 | #include "net_driver.h" | |
3273c2e8 | 24 | #include "efx.h" |
744093c9 | 25 | #include "nic.h" |
3273c2e8 | 26 | #include "selftest.h" |
3273c2e8 | 27 | #include "workarounds.h" |
3273c2e8 BH |
28 | |
29 | /* | |
30 | * Loopback test packet structure | |
31 | * | |
32 | * The self-test should stress every RSS vector, and unfortunately | |
33 | * Falcon only performs RSS on TCP/UDP packets. | |
34 | */ | |
35 | struct efx_loopback_payload { | |
36 | struct ethhdr header; | |
37 | struct iphdr ip; | |
38 | struct udphdr udp; | |
39 | __be16 iteration; | |
40 | const char msg[64]; | |
ba2d3587 | 41 | } __packed; |
3273c2e8 BH |
42 | |
43 | /* Loopback test source MAC address */ | |
44 | static const unsigned char payload_source[ETH_ALEN] = { | |
45 | 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b, | |
46 | }; | |
47 | ||
94de803d | 48 | static const char payload_msg[] = |
3273c2e8 BH |
49 | "Hello world! This is an Efx loopback test in progress!"; |
50 | ||
d215697f | 51 | /* Interrupt mode names */ |
52 | static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; | |
53 | static const char *efx_interrupt_mode_names[] = { | |
54 | [EFX_INT_MODE_MSIX] = "MSI-X", | |
55 | [EFX_INT_MODE_MSI] = "MSI", | |
56 | [EFX_INT_MODE_LEGACY] = "legacy", | |
57 | }; | |
58 | #define INT_MODE(efx) \ | |
59 | STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode) | |
60 | ||
3273c2e8 | 61 | /** |
8c8661e4 | 62 | * efx_loopback_state - persistent state during a loopback selftest |
3273c2e8 BH |
63 | * @flush: Drop all packets in efx_loopback_rx_packet |
64 | * @packet_count: Number of packets being used in this test | |
65 | * @skbs: An array of skbs transmitted | |
f30eb23e | 66 | * @offload_csum: Checksums are being offloaded |
3273c2e8 BH |
67 | * @rx_good: RX good packet count |
68 | * @rx_bad: RX bad packet count | |
69 | * @payload: Payload used in tests | |
70 | */ | |
8c8661e4 | 71 | struct efx_loopback_state { |
dc8cfa55 | 72 | bool flush; |
3273c2e8 BH |
73 | int packet_count; |
74 | struct sk_buff **skbs; | |
dc8cfa55 | 75 | bool offload_csum; |
3273c2e8 BH |
76 | atomic_t rx_good; |
77 | atomic_t rx_bad; | |
78 | struct efx_loopback_payload payload; | |
79 | }; | |
80 | ||
81 | /************************************************************************** | |
82 | * | |
8c8661e4 | 83 | * MII, NVRAM and register tests |
3273c2e8 BH |
84 | * |
85 | **************************************************************************/ | |
86 | ||
4f16c073 | 87 | static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests) |
8c8661e4 BH |
88 | { |
89 | int rc = 0; | |
8c8661e4 | 90 | |
4f16c073 BH |
91 | if (efx->phy_op->test_alive) { |
92 | rc = efx->phy_op->test_alive(efx); | |
93 | tests->phy_alive = rc ? -1 : 1; | |
8c8661e4 BH |
94 | } |
95 | ||
8c8661e4 BH |
96 | return rc; |
97 | } | |
98 | ||
99 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
100 | { | |
0aa3fbaa BH |
101 | int rc = 0; |
102 | ||
103 | if (efx->type->test_nvram) { | |
104 | rc = efx->type->test_nvram(efx); | |
105 | tests->nvram = rc ? -1 : 1; | |
106 | } | |
8c8661e4 | 107 | |
8c8661e4 BH |
108 | return rc; |
109 | } | |
110 | ||
111 | static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests) | |
112 | { | |
9bfc4bb1 | 113 | int rc = 0; |
8c8661e4 | 114 | |
9bfc4bb1 BH |
115 | /* Test register access */ |
116 | if (efx->type->test_registers) { | |
117 | rc = efx->type->test_registers(efx); | |
118 | tests->registers = rc ? -1 : 1; | |
119 | } | |
8c8661e4 | 120 | |
8c8661e4 BH |
121 | return rc; |
122 | } | |
3273c2e8 BH |
123 | |
124 | /************************************************************************** | |
125 | * | |
126 | * Interrupt and event queue testing | |
127 | * | |
128 | **************************************************************************/ | |
129 | ||
130 | /* Test generation and receipt of interrupts */ | |
131 | static int efx_test_interrupts(struct efx_nic *efx, | |
132 | struct efx_self_tests *tests) | |
133 | { | |
134 | struct efx_channel *channel; | |
135 | ||
62776d03 | 136 | netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); |
3273c2e8 BH |
137 | tests->interrupt = -1; |
138 | ||
139 | /* Reset interrupt flag */ | |
140 | efx->last_irq_cpu = -1; | |
141 | smp_wmb(); | |
142 | ||
143 | /* ACK each interrupting event queue. Receiving an interrupt due to | |
144 | * traffic before a test event is raised is considered a pass */ | |
64ee3120 | 145 | efx_for_each_channel(channel, efx) { |
3273c2e8 BH |
146 | if (channel->work_pending) |
147 | efx_process_channel_now(channel); | |
148 | if (efx->last_irq_cpu >= 0) | |
149 | goto success; | |
150 | } | |
151 | ||
152b6a62 | 152 | efx_nic_generate_interrupt(efx); |
3273c2e8 BH |
153 | |
154 | /* Wait for arrival of test interrupt. */ | |
62776d03 | 155 | netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n"); |
3273c2e8 BH |
156 | schedule_timeout_uninterruptible(HZ / 10); |
157 | if (efx->last_irq_cpu >= 0) | |
158 | goto success; | |
159 | ||
62776d03 | 160 | netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); |
3273c2e8 BH |
161 | return -ETIMEDOUT; |
162 | ||
163 | success: | |
62776d03 BH |
164 | netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", |
165 | INT_MODE(efx), | |
c459302d | 166 | efx->last_irq_cpu); |
3273c2e8 BH |
167 | tests->interrupt = 1; |
168 | return 0; | |
169 | } | |
170 | ||
3273c2e8 BH |
171 | /* Test generation and receipt of interrupting events */ |
172 | static int efx_test_eventq_irq(struct efx_channel *channel, | |
173 | struct efx_self_tests *tests) | |
174 | { | |
62776d03 | 175 | struct efx_nic *efx = channel->efx; |
d730dc52 | 176 | unsigned int magic_count, count; |
3273c2e8 BH |
177 | |
178 | tests->eventq_dma[channel->channel] = -1; | |
179 | tests->eventq_int[channel->channel] = -1; | |
180 | tests->eventq_poll[channel->channel] = -1; | |
181 | ||
d730dc52 | 182 | magic_count = channel->magic_count; |
3273c2e8 | 183 | channel->efx->last_irq_cpu = -1; |
3273c2e8 BH |
184 | smp_wmb(); |
185 | ||
d730dc52 | 186 | efx_nic_generate_test_event(channel); |
3273c2e8 BH |
187 | |
188 | /* Wait for arrival of interrupt */ | |
189 | count = 0; | |
190 | do { | |
191 | schedule_timeout_uninterruptible(HZ / 100); | |
192 | ||
193 | if (channel->work_pending) | |
194 | efx_process_channel_now(channel); | |
195 | ||
d730dc52 | 196 | if (channel->magic_count != magic_count) |
3273c2e8 BH |
197 | goto eventq_ok; |
198 | } while (++count < 2); | |
199 | ||
62776d03 BH |
200 | netif_err(efx, drv, efx->net_dev, |
201 | "channel %d timed out waiting for event queue\n", | |
202 | channel->channel); | |
3273c2e8 BH |
203 | |
204 | /* See if interrupt arrived */ | |
205 | if (channel->efx->last_irq_cpu >= 0) { | |
62776d03 BH |
206 | netif_err(efx, drv, efx->net_dev, |
207 | "channel %d saw interrupt on CPU%d " | |
208 | "during event queue test\n", channel->channel, | |
209 | raw_smp_processor_id()); | |
3273c2e8 BH |
210 | tests->eventq_int[channel->channel] = 1; |
211 | } | |
212 | ||
213 | /* Check to see if event was received even if interrupt wasn't */ | |
214 | efx_process_channel_now(channel); | |
d730dc52 | 215 | if (channel->magic_count != magic_count) { |
62776d03 BH |
216 | netif_err(efx, drv, efx->net_dev, |
217 | "channel %d event was generated, but " | |
218 | "failed to trigger an interrupt\n", channel->channel); | |
3273c2e8 BH |
219 | tests->eventq_dma[channel->channel] = 1; |
220 | } | |
221 | ||
222 | return -ETIMEDOUT; | |
223 | eventq_ok: | |
62776d03 BH |
224 | netif_dbg(efx, drv, efx->net_dev, "channel %d event queue passed\n", |
225 | channel->channel); | |
3273c2e8 BH |
226 | tests->eventq_dma[channel->channel] = 1; |
227 | tests->eventq_int[channel->channel] = 1; | |
228 | tests->eventq_poll[channel->channel] = 1; | |
229 | return 0; | |
230 | } | |
231 | ||
1796721a BH |
232 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
233 | unsigned flags) | |
3273c2e8 | 234 | { |
8c8661e4 | 235 | int rc; |
3273c2e8 | 236 | |
1796721a | 237 | if (!efx->phy_op->run_tests) |
3273c2e8 | 238 | return 0; |
3273c2e8 | 239 | |
8c8661e4 | 240 | mutex_lock(&efx->mac_lock); |
4f16c073 | 241 | rc = efx->phy_op->run_tests(efx, tests->phy_ext, flags); |
8c8661e4 | 242 | mutex_unlock(&efx->mac_lock); |
8c8661e4 | 243 | return rc; |
3273c2e8 BH |
244 | } |
245 | ||
246 | /************************************************************************** | |
247 | * | |
248 | * Loopback testing | |
249 | * NB Only one loopback test can be executing concurrently. | |
250 | * | |
251 | **************************************************************************/ | |
252 | ||
253 | /* Loopback test RX callback | |
254 | * This is called for each received packet during loopback testing. | |
255 | */ | |
256 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
257 | const char *buf_ptr, int pkt_len) | |
258 | { | |
8c8661e4 | 259 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
260 | struct efx_loopback_payload *received; |
261 | struct efx_loopback_payload *payload; | |
262 | ||
263 | BUG_ON(!buf_ptr); | |
264 | ||
265 | /* If we are just flushing, then drop the packet */ | |
266 | if ((state == NULL) || state->flush) | |
267 | return; | |
268 | ||
269 | payload = &state->payload; | |
8c8661e4 | 270 | |
d3208b5e | 271 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 272 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
273 | if (state->offload_csum) |
274 | received->ip.check = payload->ip.check; | |
275 | ||
3273c2e8 BH |
276 | /* Check that header exists */ |
277 | if (pkt_len < sizeof(received->header)) { | |
62776d03 BH |
278 | netif_err(efx, drv, efx->net_dev, |
279 | "saw runt RX packet (length %d) in %s loopback " | |
280 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
281 | goto err; |
282 | } | |
283 | ||
284 | /* Check that the ethernet header exists */ | |
285 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
62776d03 BH |
286 | netif_err(efx, drv, efx->net_dev, |
287 | "saw non-loopback RX packet in %s loopback test\n", | |
288 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
289 | goto err; |
290 | } | |
291 | ||
292 | /* Check packet length */ | |
293 | if (pkt_len != sizeof(*payload)) { | |
62776d03 BH |
294 | netif_err(efx, drv, efx->net_dev, |
295 | "saw incorrect RX packet length %d (wanted %d) in " | |
296 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
297 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
298 | goto err; |
299 | } | |
300 | ||
301 | /* Check that IP header matches */ | |
302 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
62776d03 BH |
303 | netif_err(efx, drv, efx->net_dev, |
304 | "saw corrupted IP header in %s loopback test\n", | |
305 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
306 | goto err; |
307 | } | |
308 | ||
309 | /* Check that msg and padding matches */ | |
310 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
62776d03 BH |
311 | netif_err(efx, drv, efx->net_dev, |
312 | "saw corrupted RX packet in %s loopback test\n", | |
313 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
314 | goto err; |
315 | } | |
316 | ||
317 | /* Check that iteration matches */ | |
318 | if (received->iteration != payload->iteration) { | |
62776d03 BH |
319 | netif_err(efx, drv, efx->net_dev, |
320 | "saw RX packet from iteration %d (wanted %d) in " | |
321 | "%s loopback test\n", ntohs(received->iteration), | |
322 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
323 | goto err; |
324 | } | |
325 | ||
326 | /* Increase correct RX count */ | |
62776d03 BH |
327 | netif_vdbg(efx, drv, efx->net_dev, |
328 | "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
329 | |
330 | atomic_inc(&state->rx_good); | |
331 | return; | |
332 | ||
333 | err: | |
334 | #ifdef EFX_ENABLE_DEBUG | |
335 | if (atomic_read(&state->rx_bad) == 0) { | |
62776d03 | 336 | netif_err(efx, drv, efx->net_dev, "received packet:\n"); |
3273c2e8 BH |
337 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
338 | buf_ptr, pkt_len, 0); | |
62776d03 | 339 | netif_err(efx, drv, efx->net_dev, "expected packet:\n"); |
3273c2e8 BH |
340 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
341 | &state->payload, sizeof(state->payload), 0); | |
342 | } | |
343 | #endif | |
344 | atomic_inc(&state->rx_bad); | |
345 | } | |
346 | ||
347 | /* Initialise an efx_selftest_state for a new iteration */ | |
348 | static void efx_iterate_state(struct efx_nic *efx) | |
349 | { | |
8c8661e4 | 350 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
351 | struct net_device *net_dev = efx->net_dev; |
352 | struct efx_loopback_payload *payload = &state->payload; | |
353 | ||
354 | /* Initialise the layerII header */ | |
355 | memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN); | |
356 | memcpy(&payload->header.h_source, &payload_source, ETH_ALEN); | |
357 | payload->header.h_proto = htons(ETH_P_IP); | |
358 | ||
359 | /* saddr set later and used as incrementing count */ | |
360 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
361 | payload->ip.ihl = 5; | |
362 | payload->ip.check = htons(0xdead); | |
363 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); | |
364 | payload->ip.version = IPVERSION; | |
365 | payload->ip.protocol = IPPROTO_UDP; | |
366 | ||
367 | /* Initialise udp header */ | |
368 | payload->udp.source = 0; | |
369 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
370 | sizeof(struct iphdr)); | |
371 | payload->udp.check = 0; /* checksum ignored */ | |
372 | ||
373 | /* Fill out payload */ | |
374 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
375 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
376 | ||
377 | /* Fill out remaining state members */ | |
378 | atomic_set(&state->rx_good, 0); | |
379 | atomic_set(&state->rx_bad, 0); | |
380 | smp_wmb(); | |
381 | } | |
382 | ||
b9aafb0e | 383 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
384 | { |
385 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 386 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
387 | struct efx_loopback_payload *payload; |
388 | struct sk_buff *skb; | |
61357325 SH |
389 | int i; |
390 | netdev_tx_t rc; | |
3273c2e8 BH |
391 | |
392 | /* Transmit N copies of buffer */ | |
393 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 394 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
395 | * transmit completion counting */ |
396 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
397 | if (!skb) | |
398 | return -ENOMEM; | |
399 | state->skbs[i] = skb; | |
400 | skb_get(skb); | |
401 | ||
402 | /* Copy the payload in, incrementing the source address to | |
403 | * exercise the rss vectors */ | |
404 | payload = ((struct efx_loopback_payload *) | |
405 | skb_put(skb, sizeof(state->payload))); | |
406 | memcpy(payload, &state->payload, sizeof(state->payload)); | |
407 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
408 | ||
409 | /* Ensure everything we've written is visible to the | |
410 | * interrupt handler. */ | |
411 | smp_wmb(); | |
412 | ||
55668611 | 413 | if (efx_dev_registered(efx)) |
3273c2e8 | 414 | netif_tx_lock_bh(efx->net_dev); |
497f5ba3 | 415 | rc = efx_enqueue_skb(tx_queue, skb); |
55668611 | 416 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
417 | netif_tx_unlock_bh(efx->net_dev); |
418 | ||
419 | if (rc != NETDEV_TX_OK) { | |
62776d03 BH |
420 | netif_err(efx, drv, efx->net_dev, |
421 | "TX queue %d could not transmit packet %d of " | |
422 | "%d in %s loopback test\n", tx_queue->queue, | |
423 | i + 1, state->packet_count, | |
424 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
425 | |
426 | /* Defer cleaning up the other skbs for the caller */ | |
427 | kfree_skb(skb); | |
428 | return -EPIPE; | |
429 | } | |
430 | } | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
b9aafb0e BH |
435 | static int efx_poll_loopback(struct efx_nic *efx) |
436 | { | |
8c8661e4 | 437 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e BH |
438 | struct efx_channel *channel; |
439 | ||
440 | /* NAPI polling is not enabled, so process channels | |
441 | * synchronously */ | |
64ee3120 | 442 | efx_for_each_channel(channel, efx) { |
b9aafb0e BH |
443 | if (channel->work_pending) |
444 | efx_process_channel_now(channel); | |
445 | } | |
446 | return atomic_read(&state->rx_good) == state->packet_count; | |
447 | } | |
448 | ||
449 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
450 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
451 | { |
452 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 453 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
454 | struct sk_buff *skb; |
455 | int tx_done = 0, rx_good, rx_bad; | |
456 | int i, rc = 0; | |
457 | ||
55668611 | 458 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
459 | netif_tx_lock_bh(efx->net_dev); |
460 | ||
461 | /* Count the number of tx completions, and decrement the refcnt. Any | |
462 | * skbs not already completed will be free'd when the queue is flushed */ | |
463 | for (i=0; i < state->packet_count; i++) { | |
464 | skb = state->skbs[i]; | |
465 | if (skb && !skb_shared(skb)) | |
466 | ++tx_done; | |
467 | dev_kfree_skb_any(skb); | |
468 | } | |
469 | ||
55668611 | 470 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
471 | netif_tx_unlock_bh(efx->net_dev); |
472 | ||
473 | /* Check TX completion and received packet counts */ | |
474 | rx_good = atomic_read(&state->rx_good); | |
475 | rx_bad = atomic_read(&state->rx_bad); | |
476 | if (tx_done != state->packet_count) { | |
477 | /* Don't free the skbs; they will be picked up on TX | |
478 | * overflow or channel teardown. | |
479 | */ | |
62776d03 BH |
480 | netif_err(efx, drv, efx->net_dev, |
481 | "TX queue %d saw only %d out of an expected %d " | |
482 | "TX completion events in %s loopback test\n", | |
483 | tx_queue->queue, tx_done, state->packet_count, | |
484 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
485 | rc = -ETIMEDOUT; |
486 | /* Allow to fall through so we see the RX errors as well */ | |
487 | } | |
488 | ||
489 | /* We may always be up to a flush away from our desired packet total */ | |
490 | if (rx_good != state->packet_count) { | |
62776d03 BH |
491 | netif_dbg(efx, drv, efx->net_dev, |
492 | "TX queue %d saw only %d out of an expected %d " | |
493 | "received packets in %s loopback test\n", | |
494 | tx_queue->queue, rx_good, state->packet_count, | |
495 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
496 | rc = -ETIMEDOUT; |
497 | /* Fall through */ | |
498 | } | |
499 | ||
500 | /* Update loopback test structure */ | |
501 | lb_tests->tx_sent[tx_queue->queue] += state->packet_count; | |
502 | lb_tests->tx_done[tx_queue->queue] += tx_done; | |
503 | lb_tests->rx_good += rx_good; | |
504 | lb_tests->rx_bad += rx_bad; | |
505 | ||
506 | return rc; | |
507 | } | |
508 | ||
509 | static int | |
510 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
511 | struct efx_loopback_self_tests *lb_tests) | |
512 | { | |
513 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 514 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 515 | int i, begin_rc, end_rc; |
3273c2e8 | 516 | |
8c8661e4 | 517 | for (i = 0; i < 3; i++) { |
3273c2e8 | 518 | /* Determine how many packets to send */ |
ecc910f5 | 519 | state->packet_count = efx->txq_entries / 3; |
3273c2e8 BH |
520 | state->packet_count = min(1 << (i << 2), state->packet_count); |
521 | state->skbs = kzalloc(sizeof(state->skbs[0]) * | |
522 | state->packet_count, GFP_KERNEL); | |
9b7bfc4c BH |
523 | if (!state->skbs) |
524 | return -ENOMEM; | |
dc8cfa55 | 525 | state->flush = false; |
3273c2e8 | 526 | |
62776d03 BH |
527 | netif_dbg(efx, drv, efx->net_dev, |
528 | "TX queue %d testing %s loopback with %d packets\n", | |
529 | tx_queue->queue, LOOPBACK_MODE(efx), | |
530 | state->packet_count); | |
3273c2e8 BH |
531 | |
532 | efx_iterate_state(efx); | |
b9aafb0e BH |
533 | begin_rc = efx_begin_loopback(tx_queue); |
534 | ||
535 | /* This will normally complete very quickly, but be | |
536 | * prepared to wait up to 100 ms. */ | |
537 | msleep(1); | |
538 | if (!efx_poll_loopback(efx)) { | |
539 | msleep(100); | |
540 | efx_poll_loopback(efx); | |
3273c2e8 BH |
541 | } |
542 | ||
b9aafb0e | 543 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
544 | kfree(state->skbs); |
545 | ||
b9aafb0e | 546 | if (begin_rc || end_rc) { |
3273c2e8 BH |
547 | /* Wait a while to ensure there are no packets |
548 | * floating around after a failure. */ | |
549 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 550 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
551 | } |
552 | } | |
553 | ||
62776d03 BH |
554 | netif_dbg(efx, drv, efx->net_dev, |
555 | "TX queue %d passed %s loopback test with a burst length " | |
556 | "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
557 | state->packet_count); | |
3273c2e8 | 558 | |
a0c2c190 | 559 | return 0; |
3273c2e8 BH |
560 | } |
561 | ||
78c1f0a0 SH |
562 | /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
563 | * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it | |
564 | * to delay and retry. Therefore, it's safer to just poll directly. Wait | |
565 | * for link up and any faults to dissipate. */ | |
566 | static int efx_wait_for_link(struct efx_nic *efx) | |
567 | { | |
568 | struct efx_link_state *link_state = &efx->link_state; | |
901d3fe8 | 569 | int count, link_up_count = 0; |
78c1f0a0 SH |
570 | bool link_up; |
571 | ||
572 | for (count = 0; count < 40; count++) { | |
573 | schedule_timeout_uninterruptible(HZ / 10); | |
574 | ||
575 | if (efx->type->monitor != NULL) { | |
576 | mutex_lock(&efx->mac_lock); | |
577 | efx->type->monitor(efx); | |
578 | mutex_unlock(&efx->mac_lock); | |
579 | } else { | |
f7d12cdc | 580 | struct efx_channel *channel = efx_get_channel(efx, 0); |
78c1f0a0 SH |
581 | if (channel->work_pending) |
582 | efx_process_channel_now(channel); | |
583 | } | |
584 | ||
585 | mutex_lock(&efx->mac_lock); | |
586 | link_up = link_state->up; | |
587 | if (link_up) | |
588 | link_up = !efx->mac_op->check_fault(efx); | |
589 | mutex_unlock(&efx->mac_lock); | |
590 | ||
901d3fe8 SH |
591 | if (link_up) { |
592 | if (++link_up_count == 2) | |
593 | return 0; | |
594 | } else { | |
595 | link_up_count = 0; | |
596 | } | |
78c1f0a0 SH |
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; | |
f7d12cdc | 607 | struct efx_channel *channel = efx_get_channel(efx, 0); |
3273c2e8 | 608 | struct efx_tx_queue *tx_queue; |
78c1f0a0 | 609 | int rc = 0; |
3273c2e8 | 610 | |
8c8661e4 BH |
611 | /* Set the port loopback_selftest member. From this point on |
612 | * all received packets will be dropped. Mark the state as | |
613 | * "flushing" so all inflight packets are dropped */ | |
614 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
615 | if (state == NULL) | |
616 | return -ENOMEM; | |
617 | BUG_ON(efx->loopback_selftest); | |
618 | state->flush = true; | |
619 | efx->loopback_selftest = state; | |
3273c2e8 BH |
620 | |
621 | /* Test all supported loopback modes */ | |
8c8661e4 | 622 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
623 | if (!(loopback_modes & (1 << mode))) |
624 | continue; | |
625 | ||
626 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 627 | state->flush = true; |
78c1f0a0 | 628 | mutex_lock(&efx->mac_lock); |
3273c2e8 | 629 | efx->loopback_mode = mode; |
78c1f0a0 SH |
630 | rc = __efx_reconfigure_port(efx); |
631 | mutex_unlock(&efx->mac_lock); | |
632 | if (rc) { | |
62776d03 BH |
633 | netif_err(efx, drv, efx->net_dev, |
634 | "unable to move into %s loopback\n", | |
635 | LOOPBACK_MODE(efx)); | |
78c1f0a0 SH |
636 | goto out; |
637 | } | |
3273c2e8 | 638 | |
78c1f0a0 SH |
639 | rc = efx_wait_for_link(efx); |
640 | if (rc) { | |
62776d03 BH |
641 | netif_err(efx, drv, efx->net_dev, |
642 | "loopback %s never came up\n", | |
643 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
644 | goto out; |
645 | } | |
646 | ||
5298c37f | 647 | /* Test both types of TX queue */ |
f7d12cdc | 648 | efx_for_each_channel_tx_queue(tx_queue, channel) { |
a4900ac9 BH |
649 | state->offload_csum = (tx_queue->queue & |
650 | EFX_TXQ_TYPE_OFFLOAD); | |
f8ea0b67 BH |
651 | rc = efx_test_loopback(tx_queue, |
652 | &tests->loopback[mode]); | |
3273c2e8 BH |
653 | if (rc) |
654 | goto out; | |
655 | } | |
656 | } | |
657 | ||
658 | out: | |
8c8661e4 | 659 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 660 | state->flush = true; |
8c8661e4 BH |
661 | efx->loopback_selftest = NULL; |
662 | wmb(); | |
663 | kfree(state); | |
3273c2e8 BH |
664 | |
665 | return rc; | |
666 | } | |
667 | ||
668 | /************************************************************************** | |
669 | * | |
2ef3068e | 670 | * Entry point |
3273c2e8 BH |
671 | * |
672 | *************************************************************************/ | |
673 | ||
2ef3068e BH |
674 | int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
675 | unsigned flags) | |
3273c2e8 | 676 | { |
2ef3068e BH |
677 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
678 | int phy_mode = efx->phy_mode; | |
4b988280 | 679 | enum reset_type reset_method = RESET_TYPE_INVISIBLE; |
3273c2e8 | 680 | struct efx_channel *channel; |
2ef3068e BH |
681 | int rc_test = 0, rc_reset = 0, rc; |
682 | ||
683 | /* Online (i.e. non-disruptive) testing | |
684 | * This checks interrupt generation, event delivery and PHY presence. */ | |
8c8661e4 | 685 | |
4f16c073 | 686 | rc = efx_test_phy_alive(efx, tests); |
2ef3068e BH |
687 | if (rc && !rc_test) |
688 | rc_test = rc; | |
8c8661e4 BH |
689 | |
690 | rc = efx_test_nvram(efx, tests); | |
2ef3068e BH |
691 | if (rc && !rc_test) |
692 | rc_test = rc; | |
3273c2e8 | 693 | |
f8ea0b67 | 694 | rc = efx_test_interrupts(efx, tests); |
2ef3068e BH |
695 | if (rc && !rc_test) |
696 | rc_test = rc; | |
8c8661e4 | 697 | |
3273c2e8 | 698 | efx_for_each_channel(channel, efx) { |
64ee3120 | 699 | rc = efx_test_eventq_irq(channel, tests); |
2ef3068e BH |
700 | if (rc && !rc_test) |
701 | rc_test = rc; | |
3273c2e8 | 702 | } |
8c8661e4 | 703 | |
2ef3068e BH |
704 | if (rc_test) |
705 | return rc_test; | |
3273c2e8 | 706 | |
2ef3068e | 707 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 708 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
709 | |
710 | /* Offline (i.e. disruptive) testing | |
711 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 BH |
712 | |
713 | /* force the carrier state off so the kernel doesn't transmit during | |
714 | * the loopback test, and the watchdog timeout doesn't fire. Also put | |
715 | * falcon into loopback for the register test. | |
716 | */ | |
717 | mutex_lock(&efx->mac_lock); | |
718 | efx->port_inhibited = true; | |
6f158d5f BH |
719 | if (efx->loopback_modes) { |
720 | /* We need the 312 clock from the PHY to test the XMAC | |
721 | * registers, so move into XGMII loopback if available */ | |
722 | if (efx->loopback_modes & (1 << LOOPBACK_XGMII)) | |
723 | efx->loopback_mode = LOOPBACK_XGMII; | |
724 | else | |
725 | efx->loopback_mode = __ffs(efx->loopback_modes); | |
726 | } | |
727 | ||
8c8661e4 BH |
728 | __efx_reconfigure_port(efx); |
729 | mutex_unlock(&efx->mac_lock); | |
730 | ||
731 | /* free up all consumers of SRAM (including all the queues) */ | |
d3245b28 | 732 | efx_reset_down(efx, reset_method); |
8c8661e4 BH |
733 | |
734 | rc = efx_test_chip(efx, tests); | |
2ef3068e BH |
735 | if (rc && !rc_test) |
736 | rc_test = rc; | |
8c8661e4 BH |
737 | |
738 | /* reset the chip to recover from the register test */ | |
ef2b90ee | 739 | rc_reset = efx->type->reset(efx, reset_method); |
8c8661e4 | 740 | |
a5692e49 BH |
741 | /* Ensure that the phy is powered and out of loopback |
742 | * for the bist and loopback tests */ | |
743 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; | |
8c8661e4 | 744 | efx->loopback_mode = LOOPBACK_NONE; |
3273c2e8 | 745 | |
d3245b28 | 746 | rc = efx_reset_up(efx, reset_method, rc_reset == 0); |
2ef3068e BH |
747 | if (rc && !rc_reset) |
748 | rc_reset = rc; | |
749 | ||
750 | if (rc_reset) { | |
62776d03 BH |
751 | netif_err(efx, drv, efx->net_dev, |
752 | "Unable to recover from chip test\n"); | |
8c8661e4 | 753 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); |
2ef3068e | 754 | return rc_reset; |
8c8661e4 | 755 | } |
3273c2e8 | 756 | |
1796721a | 757 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
758 | if (rc && !rc_test) |
759 | rc_test = rc; | |
3273c2e8 | 760 | |
2ef3068e BH |
761 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
762 | if (rc && !rc_test) | |
763 | rc_test = rc; | |
3273c2e8 | 764 | |
8c8661e4 | 765 | /* restore the PHY to the previous state */ |
d3245b28 | 766 | mutex_lock(&efx->mac_lock); |
8c8661e4 BH |
767 | efx->phy_mode = phy_mode; |
768 | efx->port_inhibited = false; | |
d3245b28 BH |
769 | efx->loopback_mode = loopback_mode; |
770 | __efx_reconfigure_port(efx); | |
771 | mutex_unlock(&efx->mac_lock); | |
8c8661e4 | 772 | |
2ef3068e | 773 | return rc_test; |
3273c2e8 BH |
774 | } |
775 |