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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 | ||
51 | /** | |
8c8661e4 | 52 | * efx_loopback_state - persistent state during a loopback selftest |
3273c2e8 BH |
53 | * @flush: Drop all packets in efx_loopback_rx_packet |
54 | * @packet_count: Number of packets being used in this test | |
55 | * @skbs: An array of skbs transmitted | |
f30eb23e | 56 | * @offload_csum: Checksums are being offloaded |
3273c2e8 BH |
57 | * @rx_good: RX good packet count |
58 | * @rx_bad: RX bad packet count | |
59 | * @payload: Payload used in tests | |
60 | */ | |
8c8661e4 | 61 | struct efx_loopback_state { |
dc8cfa55 | 62 | bool flush; |
3273c2e8 BH |
63 | int packet_count; |
64 | struct sk_buff **skbs; | |
dc8cfa55 | 65 | bool offload_csum; |
3273c2e8 BH |
66 | atomic_t rx_good; |
67 | atomic_t rx_bad; | |
68 | struct efx_loopback_payload payload; | |
69 | }; | |
70 | ||
71 | /************************************************************************** | |
72 | * | |
8c8661e4 | 73 | * MII, NVRAM and register tests |
3273c2e8 BH |
74 | * |
75 | **************************************************************************/ | |
76 | ||
4f16c073 | 77 | static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests) |
8c8661e4 BH |
78 | { |
79 | int rc = 0; | |
8c8661e4 | 80 | |
4f16c073 BH |
81 | if (efx->phy_op->test_alive) { |
82 | rc = efx->phy_op->test_alive(efx); | |
83 | tests->phy_alive = rc ? -1 : 1; | |
8c8661e4 BH |
84 | } |
85 | ||
8c8661e4 BH |
86 | return rc; |
87 | } | |
88 | ||
89 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
90 | { | |
0aa3fbaa BH |
91 | int rc = 0; |
92 | ||
93 | if (efx->type->test_nvram) { | |
94 | rc = efx->type->test_nvram(efx); | |
95 | tests->nvram = rc ? -1 : 1; | |
96 | } | |
8c8661e4 | 97 | |
8c8661e4 BH |
98 | return rc; |
99 | } | |
100 | ||
101 | static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests) | |
102 | { | |
9bfc4bb1 | 103 | int rc = 0; |
8c8661e4 | 104 | |
9bfc4bb1 BH |
105 | /* Test register access */ |
106 | if (efx->type->test_registers) { | |
107 | rc = efx->type->test_registers(efx); | |
108 | tests->registers = rc ? -1 : 1; | |
109 | } | |
8c8661e4 | 110 | |
8c8661e4 BH |
111 | return rc; |
112 | } | |
3273c2e8 BH |
113 | |
114 | /************************************************************************** | |
115 | * | |
116 | * Interrupt and event queue testing | |
117 | * | |
118 | **************************************************************************/ | |
119 | ||
120 | /* Test generation and receipt of interrupts */ | |
121 | static int efx_test_interrupts(struct efx_nic *efx, | |
122 | struct efx_self_tests *tests) | |
123 | { | |
124 | struct efx_channel *channel; | |
125 | ||
62776d03 | 126 | netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); |
3273c2e8 BH |
127 | tests->interrupt = -1; |
128 | ||
129 | /* Reset interrupt flag */ | |
130 | efx->last_irq_cpu = -1; | |
131 | smp_wmb(); | |
132 | ||
133 | /* ACK each interrupting event queue. Receiving an interrupt due to | |
134 | * traffic before a test event is raised is considered a pass */ | |
64ee3120 | 135 | efx_for_each_channel(channel, efx) { |
3273c2e8 BH |
136 | if (channel->work_pending) |
137 | efx_process_channel_now(channel); | |
138 | if (efx->last_irq_cpu >= 0) | |
139 | goto success; | |
140 | } | |
141 | ||
152b6a62 | 142 | efx_nic_generate_interrupt(efx); |
3273c2e8 BH |
143 | |
144 | /* Wait for arrival of test interrupt. */ | |
62776d03 | 145 | netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n"); |
3273c2e8 BH |
146 | schedule_timeout_uninterruptible(HZ / 10); |
147 | if (efx->last_irq_cpu >= 0) | |
148 | goto success; | |
149 | ||
62776d03 | 150 | netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); |
3273c2e8 BH |
151 | return -ETIMEDOUT; |
152 | ||
153 | success: | |
62776d03 BH |
154 | netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", |
155 | INT_MODE(efx), | |
c459302d | 156 | efx->last_irq_cpu); |
3273c2e8 BH |
157 | tests->interrupt = 1; |
158 | return 0; | |
159 | } | |
160 | ||
3273c2e8 BH |
161 | /* Test generation and receipt of interrupting events */ |
162 | static int efx_test_eventq_irq(struct efx_channel *channel, | |
163 | struct efx_self_tests *tests) | |
164 | { | |
62776d03 | 165 | struct efx_nic *efx = channel->efx; |
d730dc52 | 166 | unsigned int magic_count, count; |
3273c2e8 BH |
167 | |
168 | tests->eventq_dma[channel->channel] = -1; | |
169 | tests->eventq_int[channel->channel] = -1; | |
170 | tests->eventq_poll[channel->channel] = -1; | |
171 | ||
d730dc52 | 172 | magic_count = channel->magic_count; |
3273c2e8 | 173 | channel->efx->last_irq_cpu = -1; |
3273c2e8 BH |
174 | smp_wmb(); |
175 | ||
d730dc52 | 176 | efx_nic_generate_test_event(channel); |
3273c2e8 BH |
177 | |
178 | /* Wait for arrival of interrupt */ | |
179 | count = 0; | |
180 | do { | |
181 | schedule_timeout_uninterruptible(HZ / 100); | |
182 | ||
183 | if (channel->work_pending) | |
184 | efx_process_channel_now(channel); | |
185 | ||
d730dc52 | 186 | if (channel->magic_count != magic_count) |
3273c2e8 BH |
187 | goto eventq_ok; |
188 | } while (++count < 2); | |
189 | ||
62776d03 BH |
190 | netif_err(efx, drv, efx->net_dev, |
191 | "channel %d timed out waiting for event queue\n", | |
192 | channel->channel); | |
3273c2e8 BH |
193 | |
194 | /* See if interrupt arrived */ | |
195 | if (channel->efx->last_irq_cpu >= 0) { | |
62776d03 BH |
196 | netif_err(efx, drv, efx->net_dev, |
197 | "channel %d saw interrupt on CPU%d " | |
198 | "during event queue test\n", channel->channel, | |
199 | raw_smp_processor_id()); | |
3273c2e8 BH |
200 | tests->eventq_int[channel->channel] = 1; |
201 | } | |
202 | ||
203 | /* Check to see if event was received even if interrupt wasn't */ | |
204 | efx_process_channel_now(channel); | |
d730dc52 | 205 | if (channel->magic_count != magic_count) { |
62776d03 BH |
206 | netif_err(efx, drv, efx->net_dev, |
207 | "channel %d event was generated, but " | |
208 | "failed to trigger an interrupt\n", channel->channel); | |
3273c2e8 BH |
209 | tests->eventq_dma[channel->channel] = 1; |
210 | } | |
211 | ||
212 | return -ETIMEDOUT; | |
213 | eventq_ok: | |
62776d03 BH |
214 | netif_dbg(efx, drv, efx->net_dev, "channel %d event queue passed\n", |
215 | channel->channel); | |
3273c2e8 BH |
216 | tests->eventq_dma[channel->channel] = 1; |
217 | tests->eventq_int[channel->channel] = 1; | |
218 | tests->eventq_poll[channel->channel] = 1; | |
219 | return 0; | |
220 | } | |
221 | ||
1796721a BH |
222 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
223 | unsigned flags) | |
3273c2e8 | 224 | { |
8c8661e4 | 225 | int rc; |
3273c2e8 | 226 | |
1796721a | 227 | if (!efx->phy_op->run_tests) |
3273c2e8 | 228 | return 0; |
3273c2e8 | 229 | |
8c8661e4 | 230 | mutex_lock(&efx->mac_lock); |
4f16c073 | 231 | rc = efx->phy_op->run_tests(efx, tests->phy_ext, flags); |
8c8661e4 | 232 | mutex_unlock(&efx->mac_lock); |
8c8661e4 | 233 | return rc; |
3273c2e8 BH |
234 | } |
235 | ||
236 | /************************************************************************** | |
237 | * | |
238 | * Loopback testing | |
239 | * NB Only one loopback test can be executing concurrently. | |
240 | * | |
241 | **************************************************************************/ | |
242 | ||
243 | /* Loopback test RX callback | |
244 | * This is called for each received packet during loopback testing. | |
245 | */ | |
246 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
247 | const char *buf_ptr, int pkt_len) | |
248 | { | |
8c8661e4 | 249 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
250 | struct efx_loopback_payload *received; |
251 | struct efx_loopback_payload *payload; | |
252 | ||
253 | BUG_ON(!buf_ptr); | |
254 | ||
255 | /* If we are just flushing, then drop the packet */ | |
256 | if ((state == NULL) || state->flush) | |
257 | return; | |
258 | ||
259 | payload = &state->payload; | |
8c8661e4 | 260 | |
39c9cf07 BH |
261 | buf_ptr += efx->type->rx_buffer_hash_size; |
262 | pkt_len -= efx->type->rx_buffer_hash_size; | |
263 | ||
d3208b5e | 264 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 265 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
266 | if (state->offload_csum) |
267 | received->ip.check = payload->ip.check; | |
268 | ||
3273c2e8 BH |
269 | /* Check that header exists */ |
270 | if (pkt_len < sizeof(received->header)) { | |
62776d03 BH |
271 | netif_err(efx, drv, efx->net_dev, |
272 | "saw runt RX packet (length %d) in %s loopback " | |
273 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
274 | goto err; |
275 | } | |
276 | ||
277 | /* Check that the ethernet header exists */ | |
278 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
62776d03 BH |
279 | netif_err(efx, drv, efx->net_dev, |
280 | "saw non-loopback RX packet in %s loopback test\n", | |
281 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
282 | goto err; |
283 | } | |
284 | ||
285 | /* Check packet length */ | |
286 | if (pkt_len != sizeof(*payload)) { | |
62776d03 BH |
287 | netif_err(efx, drv, efx->net_dev, |
288 | "saw incorrect RX packet length %d (wanted %d) in " | |
289 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
290 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
291 | goto err; |
292 | } | |
293 | ||
294 | /* Check that IP header matches */ | |
295 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
62776d03 BH |
296 | netif_err(efx, drv, efx->net_dev, |
297 | "saw corrupted IP header in %s loopback test\n", | |
298 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
299 | goto err; |
300 | } | |
301 | ||
302 | /* Check that msg and padding matches */ | |
303 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
62776d03 BH |
304 | netif_err(efx, drv, efx->net_dev, |
305 | "saw corrupted RX packet in %s loopback test\n", | |
306 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
307 | goto err; |
308 | } | |
309 | ||
310 | /* Check that iteration matches */ | |
311 | if (received->iteration != payload->iteration) { | |
62776d03 BH |
312 | netif_err(efx, drv, efx->net_dev, |
313 | "saw RX packet from iteration %d (wanted %d) in " | |
314 | "%s loopback test\n", ntohs(received->iteration), | |
315 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
316 | goto err; |
317 | } | |
318 | ||
319 | /* Increase correct RX count */ | |
62776d03 BH |
320 | netif_vdbg(efx, drv, efx->net_dev, |
321 | "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
322 | |
323 | atomic_inc(&state->rx_good); | |
324 | return; | |
325 | ||
326 | err: | |
327 | #ifdef EFX_ENABLE_DEBUG | |
328 | if (atomic_read(&state->rx_bad) == 0) { | |
62776d03 | 329 | netif_err(efx, drv, efx->net_dev, "received packet:\n"); |
3273c2e8 BH |
330 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
331 | buf_ptr, pkt_len, 0); | |
62776d03 | 332 | netif_err(efx, drv, efx->net_dev, "expected packet:\n"); |
3273c2e8 BH |
333 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
334 | &state->payload, sizeof(state->payload), 0); | |
335 | } | |
336 | #endif | |
337 | atomic_inc(&state->rx_bad); | |
338 | } | |
339 | ||
340 | /* Initialise an efx_selftest_state for a new iteration */ | |
341 | static void efx_iterate_state(struct efx_nic *efx) | |
342 | { | |
8c8661e4 | 343 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
344 | struct net_device *net_dev = efx->net_dev; |
345 | struct efx_loopback_payload *payload = &state->payload; | |
346 | ||
347 | /* Initialise the layerII header */ | |
348 | memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN); | |
349 | memcpy(&payload->header.h_source, &payload_source, ETH_ALEN); | |
350 | payload->header.h_proto = htons(ETH_P_IP); | |
351 | ||
352 | /* saddr set later and used as incrementing count */ | |
353 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
354 | payload->ip.ihl = 5; | |
355 | payload->ip.check = htons(0xdead); | |
356 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); | |
357 | payload->ip.version = IPVERSION; | |
358 | payload->ip.protocol = IPPROTO_UDP; | |
359 | ||
360 | /* Initialise udp header */ | |
361 | payload->udp.source = 0; | |
362 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
363 | sizeof(struct iphdr)); | |
364 | payload->udp.check = 0; /* checksum ignored */ | |
365 | ||
366 | /* Fill out payload */ | |
367 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
368 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
369 | ||
370 | /* Fill out remaining state members */ | |
371 | atomic_set(&state->rx_good, 0); | |
372 | atomic_set(&state->rx_bad, 0); | |
373 | smp_wmb(); | |
374 | } | |
375 | ||
b9aafb0e | 376 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
377 | { |
378 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 379 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
380 | struct efx_loopback_payload *payload; |
381 | struct sk_buff *skb; | |
61357325 SH |
382 | int i; |
383 | netdev_tx_t rc; | |
3273c2e8 BH |
384 | |
385 | /* Transmit N copies of buffer */ | |
386 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 387 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
388 | * transmit completion counting */ |
389 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
390 | if (!skb) | |
391 | return -ENOMEM; | |
392 | state->skbs[i] = skb; | |
393 | skb_get(skb); | |
394 | ||
395 | /* Copy the payload in, incrementing the source address to | |
396 | * exercise the rss vectors */ | |
397 | payload = ((struct efx_loopback_payload *) | |
398 | skb_put(skb, sizeof(state->payload))); | |
399 | memcpy(payload, &state->payload, sizeof(state->payload)); | |
400 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
401 | ||
402 | /* Ensure everything we've written is visible to the | |
403 | * interrupt handler. */ | |
404 | smp_wmb(); | |
405 | ||
55668611 | 406 | if (efx_dev_registered(efx)) |
3273c2e8 | 407 | netif_tx_lock_bh(efx->net_dev); |
497f5ba3 | 408 | rc = efx_enqueue_skb(tx_queue, skb); |
55668611 | 409 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
410 | netif_tx_unlock_bh(efx->net_dev); |
411 | ||
412 | if (rc != NETDEV_TX_OK) { | |
62776d03 BH |
413 | netif_err(efx, drv, efx->net_dev, |
414 | "TX queue %d could not transmit packet %d of " | |
415 | "%d in %s loopback test\n", tx_queue->queue, | |
416 | i + 1, state->packet_count, | |
417 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
418 | |
419 | /* Defer cleaning up the other skbs for the caller */ | |
420 | kfree_skb(skb); | |
421 | return -EPIPE; | |
422 | } | |
423 | } | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
b9aafb0e BH |
428 | static int efx_poll_loopback(struct efx_nic *efx) |
429 | { | |
8c8661e4 | 430 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e BH |
431 | struct efx_channel *channel; |
432 | ||
433 | /* NAPI polling is not enabled, so process channels | |
434 | * synchronously */ | |
64ee3120 | 435 | efx_for_each_channel(channel, efx) { |
b9aafb0e BH |
436 | if (channel->work_pending) |
437 | efx_process_channel_now(channel); | |
438 | } | |
439 | return atomic_read(&state->rx_good) == state->packet_count; | |
440 | } | |
441 | ||
442 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
443 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
444 | { |
445 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 446 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
447 | struct sk_buff *skb; |
448 | int tx_done = 0, rx_good, rx_bad; | |
449 | int i, rc = 0; | |
450 | ||
55668611 | 451 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
452 | netif_tx_lock_bh(efx->net_dev); |
453 | ||
454 | /* Count the number of tx completions, and decrement the refcnt. Any | |
455 | * skbs not already completed will be free'd when the queue is flushed */ | |
456 | for (i=0; i < state->packet_count; i++) { | |
457 | skb = state->skbs[i]; | |
458 | if (skb && !skb_shared(skb)) | |
459 | ++tx_done; | |
460 | dev_kfree_skb_any(skb); | |
461 | } | |
462 | ||
55668611 | 463 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
464 | netif_tx_unlock_bh(efx->net_dev); |
465 | ||
466 | /* Check TX completion and received packet counts */ | |
467 | rx_good = atomic_read(&state->rx_good); | |
468 | rx_bad = atomic_read(&state->rx_bad); | |
469 | if (tx_done != state->packet_count) { | |
470 | /* Don't free the skbs; they will be picked up on TX | |
471 | * overflow or channel teardown. | |
472 | */ | |
62776d03 BH |
473 | netif_err(efx, drv, efx->net_dev, |
474 | "TX queue %d saw only %d out of an expected %d " | |
475 | "TX completion events in %s loopback test\n", | |
476 | tx_queue->queue, tx_done, state->packet_count, | |
477 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
478 | rc = -ETIMEDOUT; |
479 | /* Allow to fall through so we see the RX errors as well */ | |
480 | } | |
481 | ||
482 | /* We may always be up to a flush away from our desired packet total */ | |
483 | if (rx_good != state->packet_count) { | |
62776d03 BH |
484 | netif_dbg(efx, drv, efx->net_dev, |
485 | "TX queue %d saw only %d out of an expected %d " | |
486 | "received packets in %s loopback test\n", | |
487 | tx_queue->queue, rx_good, state->packet_count, | |
488 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
489 | rc = -ETIMEDOUT; |
490 | /* Fall through */ | |
491 | } | |
492 | ||
493 | /* Update loopback test structure */ | |
494 | lb_tests->tx_sent[tx_queue->queue] += state->packet_count; | |
495 | lb_tests->tx_done[tx_queue->queue] += tx_done; | |
496 | lb_tests->rx_good += rx_good; | |
497 | lb_tests->rx_bad += rx_bad; | |
498 | ||
499 | return rc; | |
500 | } | |
501 | ||
502 | static int | |
503 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
504 | struct efx_loopback_self_tests *lb_tests) | |
505 | { | |
506 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 507 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 508 | int i, begin_rc, end_rc; |
3273c2e8 | 509 | |
8c8661e4 | 510 | for (i = 0; i < 3; i++) { |
3273c2e8 | 511 | /* Determine how many packets to send */ |
3ffeabdd | 512 | state->packet_count = EFX_TXQ_SIZE / 3; |
3273c2e8 BH |
513 | state->packet_count = min(1 << (i << 2), state->packet_count); |
514 | state->skbs = kzalloc(sizeof(state->skbs[0]) * | |
515 | state->packet_count, GFP_KERNEL); | |
9b7bfc4c BH |
516 | if (!state->skbs) |
517 | return -ENOMEM; | |
dc8cfa55 | 518 | state->flush = false; |
3273c2e8 | 519 | |
62776d03 BH |
520 | netif_dbg(efx, drv, efx->net_dev, |
521 | "TX queue %d testing %s loopback with %d packets\n", | |
522 | tx_queue->queue, LOOPBACK_MODE(efx), | |
523 | state->packet_count); | |
3273c2e8 BH |
524 | |
525 | efx_iterate_state(efx); | |
b9aafb0e BH |
526 | begin_rc = efx_begin_loopback(tx_queue); |
527 | ||
528 | /* This will normally complete very quickly, but be | |
529 | * prepared to wait up to 100 ms. */ | |
530 | msleep(1); | |
531 | if (!efx_poll_loopback(efx)) { | |
532 | msleep(100); | |
533 | efx_poll_loopback(efx); | |
3273c2e8 BH |
534 | } |
535 | ||
b9aafb0e | 536 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
537 | kfree(state->skbs); |
538 | ||
b9aafb0e | 539 | if (begin_rc || end_rc) { |
3273c2e8 BH |
540 | /* Wait a while to ensure there are no packets |
541 | * floating around after a failure. */ | |
542 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 543 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
544 | } |
545 | } | |
546 | ||
62776d03 BH |
547 | netif_dbg(efx, drv, efx->net_dev, |
548 | "TX queue %d passed %s loopback test with a burst length " | |
549 | "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
550 | state->packet_count); | |
3273c2e8 | 551 | |
a0c2c190 | 552 | return 0; |
3273c2e8 BH |
553 | } |
554 | ||
78c1f0a0 SH |
555 | /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
556 | * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it | |
557 | * to delay and retry. Therefore, it's safer to just poll directly. Wait | |
558 | * for link up and any faults to dissipate. */ | |
559 | static int efx_wait_for_link(struct efx_nic *efx) | |
560 | { | |
561 | struct efx_link_state *link_state = &efx->link_state; | |
901d3fe8 | 562 | int count, link_up_count = 0; |
78c1f0a0 SH |
563 | bool link_up; |
564 | ||
565 | for (count = 0; count < 40; count++) { | |
566 | schedule_timeout_uninterruptible(HZ / 10); | |
567 | ||
568 | if (efx->type->monitor != NULL) { | |
569 | mutex_lock(&efx->mac_lock); | |
570 | efx->type->monitor(efx); | |
571 | mutex_unlock(&efx->mac_lock); | |
572 | } else { | |
573 | struct efx_channel *channel = &efx->channel[0]; | |
574 | if (channel->work_pending) | |
575 | efx_process_channel_now(channel); | |
576 | } | |
577 | ||
578 | mutex_lock(&efx->mac_lock); | |
579 | link_up = link_state->up; | |
580 | if (link_up) | |
581 | link_up = !efx->mac_op->check_fault(efx); | |
582 | mutex_unlock(&efx->mac_lock); | |
583 | ||
901d3fe8 SH |
584 | if (link_up) { |
585 | if (++link_up_count == 2) | |
586 | return 0; | |
587 | } else { | |
588 | link_up_count = 0; | |
589 | } | |
78c1f0a0 SH |
590 | } |
591 | ||
592 | return -ETIMEDOUT; | |
593 | } | |
594 | ||
a5692e49 | 595 | static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
3273c2e8 BH |
596 | unsigned int loopback_modes) |
597 | { | |
8c8661e4 BH |
598 | enum efx_loopback_mode mode; |
599 | struct efx_loopback_state *state; | |
3273c2e8 | 600 | struct efx_tx_queue *tx_queue; |
78c1f0a0 | 601 | int rc = 0; |
3273c2e8 | 602 | |
8c8661e4 BH |
603 | /* Set the port loopback_selftest member. From this point on |
604 | * all received packets will be dropped. Mark the state as | |
605 | * "flushing" so all inflight packets are dropped */ | |
606 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
607 | if (state == NULL) | |
608 | return -ENOMEM; | |
609 | BUG_ON(efx->loopback_selftest); | |
610 | state->flush = true; | |
611 | efx->loopback_selftest = state; | |
3273c2e8 BH |
612 | |
613 | /* Test all supported loopback modes */ | |
8c8661e4 | 614 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
615 | if (!(loopback_modes & (1 << mode))) |
616 | continue; | |
617 | ||
618 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 619 | state->flush = true; |
78c1f0a0 | 620 | mutex_lock(&efx->mac_lock); |
3273c2e8 | 621 | efx->loopback_mode = mode; |
78c1f0a0 SH |
622 | rc = __efx_reconfigure_port(efx); |
623 | mutex_unlock(&efx->mac_lock); | |
624 | if (rc) { | |
62776d03 BH |
625 | netif_err(efx, drv, efx->net_dev, |
626 | "unable to move into %s loopback\n", | |
627 | LOOPBACK_MODE(efx)); | |
78c1f0a0 SH |
628 | goto out; |
629 | } | |
3273c2e8 | 630 | |
78c1f0a0 SH |
631 | rc = efx_wait_for_link(efx); |
632 | if (rc) { | |
62776d03 BH |
633 | netif_err(efx, drv, efx->net_dev, |
634 | "loopback %s never came up\n", | |
635 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
636 | goto out; |
637 | } | |
638 | ||
5298c37f BH |
639 | /* Test both types of TX queue */ |
640 | efx_for_each_channel_tx_queue(tx_queue, &efx->channel[0]) { | |
a4900ac9 BH |
641 | state->offload_csum = (tx_queue->queue & |
642 | EFX_TXQ_TYPE_OFFLOAD); | |
f8ea0b67 BH |
643 | rc = efx_test_loopback(tx_queue, |
644 | &tests->loopback[mode]); | |
3273c2e8 BH |
645 | if (rc) |
646 | goto out; | |
647 | } | |
648 | } | |
649 | ||
650 | out: | |
8c8661e4 | 651 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 652 | state->flush = true; |
8c8661e4 BH |
653 | efx->loopback_selftest = NULL; |
654 | wmb(); | |
655 | kfree(state); | |
3273c2e8 BH |
656 | |
657 | return rc; | |
658 | } | |
659 | ||
660 | /************************************************************************** | |
661 | * | |
2ef3068e | 662 | * Entry point |
3273c2e8 BH |
663 | * |
664 | *************************************************************************/ | |
665 | ||
2ef3068e BH |
666 | int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
667 | unsigned flags) | |
3273c2e8 | 668 | { |
2ef3068e BH |
669 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
670 | int phy_mode = efx->phy_mode; | |
4b988280 | 671 | enum reset_type reset_method = RESET_TYPE_INVISIBLE; |
3273c2e8 | 672 | struct efx_channel *channel; |
2ef3068e BH |
673 | int rc_test = 0, rc_reset = 0, rc; |
674 | ||
675 | /* Online (i.e. non-disruptive) testing | |
676 | * This checks interrupt generation, event delivery and PHY presence. */ | |
8c8661e4 | 677 | |
4f16c073 | 678 | rc = efx_test_phy_alive(efx, tests); |
2ef3068e BH |
679 | if (rc && !rc_test) |
680 | rc_test = rc; | |
8c8661e4 BH |
681 | |
682 | rc = efx_test_nvram(efx, tests); | |
2ef3068e BH |
683 | if (rc && !rc_test) |
684 | rc_test = rc; | |
3273c2e8 | 685 | |
f8ea0b67 | 686 | rc = efx_test_interrupts(efx, tests); |
2ef3068e BH |
687 | if (rc && !rc_test) |
688 | rc_test = rc; | |
8c8661e4 | 689 | |
3273c2e8 | 690 | efx_for_each_channel(channel, efx) { |
64ee3120 | 691 | rc = efx_test_eventq_irq(channel, tests); |
2ef3068e BH |
692 | if (rc && !rc_test) |
693 | rc_test = rc; | |
3273c2e8 | 694 | } |
8c8661e4 | 695 | |
2ef3068e BH |
696 | if (rc_test) |
697 | return rc_test; | |
3273c2e8 | 698 | |
2ef3068e | 699 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 700 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
701 | |
702 | /* Offline (i.e. disruptive) testing | |
703 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 BH |
704 | |
705 | /* force the carrier state off so the kernel doesn't transmit during | |
706 | * the loopback test, and the watchdog timeout doesn't fire. Also put | |
707 | * falcon into loopback for the register test. | |
708 | */ | |
709 | mutex_lock(&efx->mac_lock); | |
710 | efx->port_inhibited = true; | |
6f158d5f BH |
711 | if (efx->loopback_modes) { |
712 | /* We need the 312 clock from the PHY to test the XMAC | |
713 | * registers, so move into XGMII loopback if available */ | |
714 | if (efx->loopback_modes & (1 << LOOPBACK_XGMII)) | |
715 | efx->loopback_mode = LOOPBACK_XGMII; | |
716 | else | |
717 | efx->loopback_mode = __ffs(efx->loopback_modes); | |
718 | } | |
719 | ||
8c8661e4 BH |
720 | __efx_reconfigure_port(efx); |
721 | mutex_unlock(&efx->mac_lock); | |
722 | ||
723 | /* free up all consumers of SRAM (including all the queues) */ | |
d3245b28 | 724 | efx_reset_down(efx, reset_method); |
8c8661e4 BH |
725 | |
726 | rc = efx_test_chip(efx, tests); | |
2ef3068e BH |
727 | if (rc && !rc_test) |
728 | rc_test = rc; | |
8c8661e4 BH |
729 | |
730 | /* reset the chip to recover from the register test */ | |
ef2b90ee | 731 | rc_reset = efx->type->reset(efx, reset_method); |
8c8661e4 | 732 | |
a5692e49 BH |
733 | /* Ensure that the phy is powered and out of loopback |
734 | * for the bist and loopback tests */ | |
735 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; | |
8c8661e4 | 736 | efx->loopback_mode = LOOPBACK_NONE; |
3273c2e8 | 737 | |
d3245b28 | 738 | rc = efx_reset_up(efx, reset_method, rc_reset == 0); |
2ef3068e BH |
739 | if (rc && !rc_reset) |
740 | rc_reset = rc; | |
741 | ||
742 | if (rc_reset) { | |
62776d03 BH |
743 | netif_err(efx, drv, efx->net_dev, |
744 | "Unable to recover from chip test\n"); | |
8c8661e4 | 745 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); |
2ef3068e | 746 | return rc_reset; |
8c8661e4 | 747 | } |
3273c2e8 | 748 | |
1796721a | 749 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
750 | if (rc && !rc_test) |
751 | rc_test = rc; | |
3273c2e8 | 752 | |
2ef3068e BH |
753 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
754 | if (rc && !rc_test) | |
755 | rc_test = rc; | |
3273c2e8 | 756 | |
8c8661e4 | 757 | /* restore the PHY to the previous state */ |
d3245b28 | 758 | mutex_lock(&efx->mac_lock); |
8c8661e4 BH |
759 | efx->phy_mode = phy_mode; |
760 | efx->port_inhibited = false; | |
d3245b28 BH |
761 | efx->loopback_mode = loopback_mode; |
762 | __efx_reconfigure_port(efx); | |
763 | mutex_unlock(&efx->mac_lock); | |
8c8661e4 | 764 | |
2ef3068e | 765 | return rc_test; |
3273c2e8 BH |
766 | } |
767 |