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3273c2e8 BH |
1 | /**************************************************************************** |
2 | * Driver for Solarflare Solarstorm network controllers and boards | |
3 | * Copyright 2005-2006 Fen Systems Ltd. | |
0a6f40c6 | 4 | * Copyright 2006-2010 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 | 22 | #include "net_driver.h" |
3273c2e8 | 23 | #include "efx.h" |
744093c9 | 24 | #include "nic.h" |
3273c2e8 | 25 | #include "selftest.h" |
3273c2e8 | 26 | #include "workarounds.h" |
3273c2e8 BH |
27 | |
28 | /* | |
29 | * Loopback test packet structure | |
30 | * | |
31 | * The self-test should stress every RSS vector, and unfortunately | |
32 | * Falcon only performs RSS on TCP/UDP packets. | |
33 | */ | |
34 | struct efx_loopback_payload { | |
35 | struct ethhdr header; | |
36 | struct iphdr ip; | |
37 | struct udphdr udp; | |
38 | __be16 iteration; | |
39 | const char msg[64]; | |
ba2d3587 | 40 | } __packed; |
3273c2e8 BH |
41 | |
42 | /* Loopback test source MAC address */ | |
43 | static const unsigned char payload_source[ETH_ALEN] = { | |
44 | 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b, | |
45 | }; | |
46 | ||
94de803d | 47 | static const char payload_msg[] = |
3273c2e8 BH |
48 | "Hello world! This is an Efx loopback test in progress!"; |
49 | ||
d215697f | 50 | /* Interrupt mode names */ |
51 | static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; | |
18e83e4c | 52 | static const char *const efx_interrupt_mode_names[] = { |
d215697f | 53 | [EFX_INT_MODE_MSIX] = "MSI-X", |
54 | [EFX_INT_MODE_MSI] = "MSI", | |
55 | [EFX_INT_MODE_LEGACY] = "legacy", | |
56 | }; | |
57 | #define INT_MODE(efx) \ | |
58 | STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode) | |
59 | ||
3273c2e8 | 60 | /** |
8c8661e4 | 61 | * efx_loopback_state - persistent state during a loopback selftest |
3273c2e8 BH |
62 | * @flush: Drop all packets in efx_loopback_rx_packet |
63 | * @packet_count: Number of packets being used in this test | |
64 | * @skbs: An array of skbs transmitted | |
f30eb23e | 65 | * @offload_csum: Checksums are being offloaded |
3273c2e8 BH |
66 | * @rx_good: RX good packet count |
67 | * @rx_bad: RX bad packet count | |
68 | * @payload: Payload used in tests | |
69 | */ | |
8c8661e4 | 70 | struct efx_loopback_state { |
dc8cfa55 | 71 | bool flush; |
3273c2e8 BH |
72 | int packet_count; |
73 | struct sk_buff **skbs; | |
dc8cfa55 | 74 | bool offload_csum; |
3273c2e8 BH |
75 | atomic_t rx_good; |
76 | atomic_t rx_bad; | |
77 | struct efx_loopback_payload payload; | |
78 | }; | |
79 | ||
80 | /************************************************************************** | |
81 | * | |
8c8661e4 | 82 | * MII, NVRAM and register tests |
3273c2e8 BH |
83 | * |
84 | **************************************************************************/ | |
85 | ||
4f16c073 | 86 | static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests) |
8c8661e4 BH |
87 | { |
88 | int rc = 0; | |
8c8661e4 | 89 | |
4f16c073 BH |
90 | if (efx->phy_op->test_alive) { |
91 | rc = efx->phy_op->test_alive(efx); | |
92 | tests->phy_alive = rc ? -1 : 1; | |
8c8661e4 BH |
93 | } |
94 | ||
8c8661e4 BH |
95 | return rc; |
96 | } | |
97 | ||
98 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
99 | { | |
0aa3fbaa BH |
100 | int rc = 0; |
101 | ||
102 | if (efx->type->test_nvram) { | |
103 | rc = efx->type->test_nvram(efx); | |
104 | tests->nvram = rc ? -1 : 1; | |
105 | } | |
8c8661e4 | 106 | |
8c8661e4 BH |
107 | return rc; |
108 | } | |
109 | ||
110 | static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests) | |
111 | { | |
9bfc4bb1 | 112 | int rc = 0; |
8c8661e4 | 113 | |
9bfc4bb1 BH |
114 | /* Test register access */ |
115 | if (efx->type->test_registers) { | |
116 | rc = efx->type->test_registers(efx); | |
117 | tests->registers = rc ? -1 : 1; | |
118 | } | |
8c8661e4 | 119 | |
8c8661e4 BH |
120 | return rc; |
121 | } | |
3273c2e8 BH |
122 | |
123 | /************************************************************************** | |
124 | * | |
125 | * Interrupt and event queue testing | |
126 | * | |
127 | **************************************************************************/ | |
128 | ||
129 | /* Test generation and receipt of interrupts */ | |
130 | static int efx_test_interrupts(struct efx_nic *efx, | |
131 | struct efx_self_tests *tests) | |
132 | { | |
1646a6f3 BH |
133 | int cpu; |
134 | ||
62776d03 | 135 | netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); |
3273c2e8 BH |
136 | tests->interrupt = -1; |
137 | ||
138 | /* Reset interrupt flag */ | |
139 | efx->last_irq_cpu = -1; | |
140 | smp_wmb(); | |
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 | 146 | schedule_timeout_uninterruptible(HZ / 10); |
1646a6f3 BH |
147 | cpu = ACCESS_ONCE(efx->last_irq_cpu); |
148 | if (cpu >= 0) | |
3273c2e8 BH |
149 | goto success; |
150 | ||
62776d03 | 151 | netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); |
3273c2e8 BH |
152 | return -ETIMEDOUT; |
153 | ||
154 | success: | |
62776d03 | 155 | netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", |
1646a6f3 | 156 | INT_MODE(efx), 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; |
0fb53faa BH |
166 | unsigned int read_ptr; |
167 | bool napi_ran, dma_seen, int_seen; | |
3273c2e8 | 168 | |
d4fabcc8 | 169 | read_ptr = channel->eventq_read_ptr; |
1646a6f3 | 170 | channel->last_irq_cpu = -1; |
3273c2e8 BH |
171 | smp_wmb(); |
172 | ||
d730dc52 | 173 | efx_nic_generate_test_event(channel); |
3273c2e8 | 174 | |
0fb53faa BH |
175 | /* Wait for arrival of interrupt. NAPI processing may or may |
176 | * not complete in time, but we can cope in any case. | |
177 | */ | |
178 | msleep(10); | |
179 | napi_disable(&channel->napi_str); | |
180 | if (channel->eventq_read_ptr != read_ptr) { | |
181 | napi_ran = true; | |
182 | dma_seen = true; | |
183 | int_seen = true; | |
184 | } else { | |
185 | napi_ran = false; | |
186 | dma_seen = efx_nic_event_present(channel); | |
1646a6f3 | 187 | int_seen = ACCESS_ONCE(channel->last_irq_cpu) >= 0; |
3273c2e8 | 188 | } |
0fb53faa BH |
189 | napi_enable(&channel->napi_str); |
190 | efx_nic_eventq_read_ack(channel); | |
191 | ||
192 | tests->eventq_dma[channel->channel] = dma_seen ? 1 : -1; | |
193 | tests->eventq_int[channel->channel] = int_seen ? 1 : -1; | |
194 | ||
195 | if (dma_seen && int_seen) { | |
196 | netif_dbg(efx, drv, efx->net_dev, | |
197 | "channel %d event queue passed (with%s NAPI)\n", | |
198 | channel->channel, napi_ran ? "" : "out"); | |
199 | return 0; | |
200 | } else { | |
201 | /* Report failure and whether either interrupt or DMA worked */ | |
62776d03 | 202 | netif_err(efx, drv, efx->net_dev, |
0fb53faa BH |
203 | "channel %d timed out waiting for event queue\n", |
204 | channel->channel); | |
205 | if (int_seen) | |
206 | netif_err(efx, drv, efx->net_dev, | |
207 | "channel %d saw interrupt " | |
208 | "during event queue test\n", | |
209 | channel->channel); | |
210 | if (dma_seen) | |
211 | netif_err(efx, drv, efx->net_dev, | |
212 | "channel %d event was generated, but " | |
213 | "failed to trigger an interrupt\n", | |
214 | channel->channel); | |
215 | return -ETIMEDOUT; | |
3273c2e8 | 216 | } |
3273c2e8 BH |
217 | } |
218 | ||
1796721a BH |
219 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
220 | unsigned flags) | |
3273c2e8 | 221 | { |
8c8661e4 | 222 | int rc; |
3273c2e8 | 223 | |
1796721a | 224 | if (!efx->phy_op->run_tests) |
3273c2e8 | 225 | return 0; |
3273c2e8 | 226 | |
8c8661e4 | 227 | mutex_lock(&efx->mac_lock); |
4f16c073 | 228 | rc = efx->phy_op->run_tests(efx, tests->phy_ext, flags); |
8c8661e4 | 229 | mutex_unlock(&efx->mac_lock); |
8c8661e4 | 230 | return rc; |
3273c2e8 BH |
231 | } |
232 | ||
233 | /************************************************************************** | |
234 | * | |
235 | * Loopback testing | |
236 | * NB Only one loopback test can be executing concurrently. | |
237 | * | |
238 | **************************************************************************/ | |
239 | ||
240 | /* Loopback test RX callback | |
241 | * This is called for each received packet during loopback testing. | |
242 | */ | |
243 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
244 | const char *buf_ptr, int pkt_len) | |
245 | { | |
8c8661e4 | 246 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
247 | struct efx_loopback_payload *received; |
248 | struct efx_loopback_payload *payload; | |
249 | ||
250 | BUG_ON(!buf_ptr); | |
251 | ||
252 | /* If we are just flushing, then drop the packet */ | |
253 | if ((state == NULL) || state->flush) | |
254 | return; | |
255 | ||
256 | payload = &state->payload; | |
8c8661e4 | 257 | |
d3208b5e | 258 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 259 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
260 | if (state->offload_csum) |
261 | received->ip.check = payload->ip.check; | |
262 | ||
3273c2e8 BH |
263 | /* Check that header exists */ |
264 | if (pkt_len < sizeof(received->header)) { | |
62776d03 BH |
265 | netif_err(efx, drv, efx->net_dev, |
266 | "saw runt RX packet (length %d) in %s loopback " | |
267 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
268 | goto err; |
269 | } | |
270 | ||
271 | /* Check that the ethernet header exists */ | |
272 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
62776d03 BH |
273 | netif_err(efx, drv, efx->net_dev, |
274 | "saw non-loopback RX packet in %s loopback test\n", | |
275 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
276 | goto err; |
277 | } | |
278 | ||
279 | /* Check packet length */ | |
280 | if (pkt_len != sizeof(*payload)) { | |
62776d03 BH |
281 | netif_err(efx, drv, efx->net_dev, |
282 | "saw incorrect RX packet length %d (wanted %d) in " | |
283 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
284 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
285 | goto err; |
286 | } | |
287 | ||
288 | /* Check that IP header matches */ | |
289 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
62776d03 BH |
290 | netif_err(efx, drv, efx->net_dev, |
291 | "saw corrupted IP header in %s loopback test\n", | |
292 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
293 | goto err; |
294 | } | |
295 | ||
296 | /* Check that msg and padding matches */ | |
297 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
62776d03 BH |
298 | netif_err(efx, drv, efx->net_dev, |
299 | "saw corrupted RX packet in %s loopback test\n", | |
300 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
301 | goto err; |
302 | } | |
303 | ||
304 | /* Check that iteration matches */ | |
305 | if (received->iteration != payload->iteration) { | |
62776d03 BH |
306 | netif_err(efx, drv, efx->net_dev, |
307 | "saw RX packet from iteration %d (wanted %d) in " | |
308 | "%s loopback test\n", ntohs(received->iteration), | |
309 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
310 | goto err; |
311 | } | |
312 | ||
313 | /* Increase correct RX count */ | |
62776d03 BH |
314 | netif_vdbg(efx, drv, efx->net_dev, |
315 | "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
316 | |
317 | atomic_inc(&state->rx_good); | |
318 | return; | |
319 | ||
320 | err: | |
5f3f9d6c | 321 | #ifdef DEBUG |
3273c2e8 | 322 | if (atomic_read(&state->rx_bad) == 0) { |
62776d03 | 323 | netif_err(efx, drv, efx->net_dev, "received packet:\n"); |
3273c2e8 BH |
324 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
325 | buf_ptr, pkt_len, 0); | |
62776d03 | 326 | netif_err(efx, drv, efx->net_dev, "expected packet:\n"); |
3273c2e8 BH |
327 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
328 | &state->payload, sizeof(state->payload), 0); | |
329 | } | |
330 | #endif | |
331 | atomic_inc(&state->rx_bad); | |
332 | } | |
333 | ||
334 | /* Initialise an efx_selftest_state for a new iteration */ | |
335 | static void efx_iterate_state(struct efx_nic *efx) | |
336 | { | |
8c8661e4 | 337 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
338 | struct net_device *net_dev = efx->net_dev; |
339 | struct efx_loopback_payload *payload = &state->payload; | |
340 | ||
341 | /* Initialise the layerII header */ | |
342 | memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN); | |
343 | memcpy(&payload->header.h_source, &payload_source, ETH_ALEN); | |
344 | payload->header.h_proto = htons(ETH_P_IP); | |
345 | ||
346 | /* saddr set later and used as incrementing count */ | |
347 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
348 | payload->ip.ihl = 5; | |
349 | payload->ip.check = htons(0xdead); | |
350 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); | |
351 | payload->ip.version = IPVERSION; | |
352 | payload->ip.protocol = IPPROTO_UDP; | |
353 | ||
354 | /* Initialise udp header */ | |
355 | payload->udp.source = 0; | |
356 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
357 | sizeof(struct iphdr)); | |
358 | payload->udp.check = 0; /* checksum ignored */ | |
359 | ||
360 | /* Fill out payload */ | |
361 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
362 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
363 | ||
364 | /* Fill out remaining state members */ | |
365 | atomic_set(&state->rx_good, 0); | |
366 | atomic_set(&state->rx_bad, 0); | |
367 | smp_wmb(); | |
368 | } | |
369 | ||
b9aafb0e | 370 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
371 | { |
372 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 373 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
374 | struct efx_loopback_payload *payload; |
375 | struct sk_buff *skb; | |
61357325 SH |
376 | int i; |
377 | netdev_tx_t rc; | |
3273c2e8 BH |
378 | |
379 | /* Transmit N copies of buffer */ | |
380 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 381 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
382 | * transmit completion counting */ |
383 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
384 | if (!skb) | |
385 | return -ENOMEM; | |
386 | state->skbs[i] = skb; | |
387 | skb_get(skb); | |
388 | ||
389 | /* Copy the payload in, incrementing the source address to | |
390 | * exercise the rss vectors */ | |
391 | payload = ((struct efx_loopback_payload *) | |
392 | skb_put(skb, sizeof(state->payload))); | |
393 | memcpy(payload, &state->payload, sizeof(state->payload)); | |
394 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
395 | ||
396 | /* Ensure everything we've written is visible to the | |
397 | * interrupt handler. */ | |
398 | smp_wmb(); | |
399 | ||
55668611 | 400 | if (efx_dev_registered(efx)) |
3273c2e8 | 401 | netif_tx_lock_bh(efx->net_dev); |
497f5ba3 | 402 | rc = efx_enqueue_skb(tx_queue, skb); |
55668611 | 403 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
404 | netif_tx_unlock_bh(efx->net_dev); |
405 | ||
406 | if (rc != NETDEV_TX_OK) { | |
62776d03 BH |
407 | netif_err(efx, drv, efx->net_dev, |
408 | "TX queue %d could not transmit packet %d of " | |
409 | "%d in %s loopback test\n", tx_queue->queue, | |
410 | i + 1, state->packet_count, | |
411 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
412 | |
413 | /* Defer cleaning up the other skbs for the caller */ | |
414 | kfree_skb(skb); | |
415 | return -EPIPE; | |
416 | } | |
417 | } | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
b9aafb0e BH |
422 | static int efx_poll_loopback(struct efx_nic *efx) |
423 | { | |
8c8661e4 | 424 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e BH |
425 | struct efx_channel *channel; |
426 | ||
427 | /* NAPI polling is not enabled, so process channels | |
428 | * synchronously */ | |
64ee3120 | 429 | efx_for_each_channel(channel, efx) { |
b9aafb0e BH |
430 | if (channel->work_pending) |
431 | efx_process_channel_now(channel); | |
432 | } | |
433 | return atomic_read(&state->rx_good) == state->packet_count; | |
434 | } | |
435 | ||
436 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
437 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
438 | { |
439 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 440 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
441 | struct sk_buff *skb; |
442 | int tx_done = 0, rx_good, rx_bad; | |
443 | int i, rc = 0; | |
444 | ||
55668611 | 445 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
446 | netif_tx_lock_bh(efx->net_dev); |
447 | ||
448 | /* Count the number of tx completions, and decrement the refcnt. Any | |
449 | * skbs not already completed will be free'd when the queue is flushed */ | |
9c636baf | 450 | for (i = 0; i < state->packet_count; i++) { |
3273c2e8 BH |
451 | skb = state->skbs[i]; |
452 | if (skb && !skb_shared(skb)) | |
453 | ++tx_done; | |
454 | dev_kfree_skb_any(skb); | |
455 | } | |
456 | ||
55668611 | 457 | if (efx_dev_registered(efx)) |
3273c2e8 BH |
458 | netif_tx_unlock_bh(efx->net_dev); |
459 | ||
460 | /* Check TX completion and received packet counts */ | |
461 | rx_good = atomic_read(&state->rx_good); | |
462 | rx_bad = atomic_read(&state->rx_bad); | |
463 | if (tx_done != state->packet_count) { | |
464 | /* Don't free the skbs; they will be picked up on TX | |
465 | * overflow or channel teardown. | |
466 | */ | |
62776d03 BH |
467 | netif_err(efx, drv, efx->net_dev, |
468 | "TX queue %d saw only %d out of an expected %d " | |
469 | "TX completion events in %s loopback test\n", | |
470 | tx_queue->queue, tx_done, state->packet_count, | |
471 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
472 | rc = -ETIMEDOUT; |
473 | /* Allow to fall through so we see the RX errors as well */ | |
474 | } | |
475 | ||
476 | /* We may always be up to a flush away from our desired packet total */ | |
477 | if (rx_good != state->packet_count) { | |
62776d03 BH |
478 | netif_dbg(efx, drv, efx->net_dev, |
479 | "TX queue %d saw only %d out of an expected %d " | |
480 | "received packets in %s loopback test\n", | |
481 | tx_queue->queue, rx_good, state->packet_count, | |
482 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
483 | rc = -ETIMEDOUT; |
484 | /* Fall through */ | |
485 | } | |
486 | ||
487 | /* Update loopback test structure */ | |
488 | lb_tests->tx_sent[tx_queue->queue] += state->packet_count; | |
489 | lb_tests->tx_done[tx_queue->queue] += tx_done; | |
490 | lb_tests->rx_good += rx_good; | |
491 | lb_tests->rx_bad += rx_bad; | |
492 | ||
493 | return rc; | |
494 | } | |
495 | ||
496 | static int | |
497 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
498 | struct efx_loopback_self_tests *lb_tests) | |
499 | { | |
500 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 501 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 502 | int i, begin_rc, end_rc; |
3273c2e8 | 503 | |
8c8661e4 | 504 | for (i = 0; i < 3; i++) { |
3273c2e8 | 505 | /* Determine how many packets to send */ |
ecc910f5 | 506 | state->packet_count = efx->txq_entries / 3; |
3273c2e8 | 507 | state->packet_count = min(1 << (i << 2), state->packet_count); |
c2e4e25a TM |
508 | state->skbs = kcalloc(state->packet_count, |
509 | sizeof(state->skbs[0]), GFP_KERNEL); | |
9b7bfc4c BH |
510 | if (!state->skbs) |
511 | return -ENOMEM; | |
dc8cfa55 | 512 | state->flush = false; |
3273c2e8 | 513 | |
62776d03 BH |
514 | netif_dbg(efx, drv, efx->net_dev, |
515 | "TX queue %d testing %s loopback with %d packets\n", | |
516 | tx_queue->queue, LOOPBACK_MODE(efx), | |
517 | state->packet_count); | |
3273c2e8 BH |
518 | |
519 | efx_iterate_state(efx); | |
b9aafb0e BH |
520 | begin_rc = efx_begin_loopback(tx_queue); |
521 | ||
522 | /* This will normally complete very quickly, but be | |
523 | * prepared to wait up to 100 ms. */ | |
524 | msleep(1); | |
525 | if (!efx_poll_loopback(efx)) { | |
526 | msleep(100); | |
527 | efx_poll_loopback(efx); | |
3273c2e8 BH |
528 | } |
529 | ||
b9aafb0e | 530 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
531 | kfree(state->skbs); |
532 | ||
b9aafb0e | 533 | if (begin_rc || end_rc) { |
3273c2e8 BH |
534 | /* Wait a while to ensure there are no packets |
535 | * floating around after a failure. */ | |
536 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 537 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
538 | } |
539 | } | |
540 | ||
62776d03 BH |
541 | netif_dbg(efx, drv, efx->net_dev, |
542 | "TX queue %d passed %s loopback test with a burst length " | |
543 | "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
544 | state->packet_count); | |
3273c2e8 | 545 | |
a0c2c190 | 546 | return 0; |
3273c2e8 BH |
547 | } |
548 | ||
78c1f0a0 SH |
549 | /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
550 | * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it | |
551 | * to delay and retry. Therefore, it's safer to just poll directly. Wait | |
552 | * for link up and any faults to dissipate. */ | |
553 | static int efx_wait_for_link(struct efx_nic *efx) | |
554 | { | |
555 | struct efx_link_state *link_state = &efx->link_state; | |
901d3fe8 | 556 | int count, link_up_count = 0; |
78c1f0a0 SH |
557 | bool link_up; |
558 | ||
559 | for (count = 0; count < 40; count++) { | |
560 | schedule_timeout_uninterruptible(HZ / 10); | |
561 | ||
562 | if (efx->type->monitor != NULL) { | |
563 | mutex_lock(&efx->mac_lock); | |
564 | efx->type->monitor(efx); | |
565 | mutex_unlock(&efx->mac_lock); | |
566 | } else { | |
f7d12cdc | 567 | struct efx_channel *channel = efx_get_channel(efx, 0); |
78c1f0a0 SH |
568 | if (channel->work_pending) |
569 | efx_process_channel_now(channel); | |
570 | } | |
571 | ||
572 | mutex_lock(&efx->mac_lock); | |
573 | link_up = link_state->up; | |
574 | if (link_up) | |
710b208d | 575 | link_up = !efx->type->check_mac_fault(efx); |
78c1f0a0 SH |
576 | mutex_unlock(&efx->mac_lock); |
577 | ||
901d3fe8 SH |
578 | if (link_up) { |
579 | if (++link_up_count == 2) | |
580 | return 0; | |
581 | } else { | |
582 | link_up_count = 0; | |
583 | } | |
78c1f0a0 SH |
584 | } |
585 | ||
586 | return -ETIMEDOUT; | |
587 | } | |
588 | ||
a5692e49 | 589 | static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
3273c2e8 BH |
590 | unsigned int loopback_modes) |
591 | { | |
8c8661e4 BH |
592 | enum efx_loopback_mode mode; |
593 | struct efx_loopback_state *state; | |
f7d12cdc | 594 | struct efx_channel *channel = efx_get_channel(efx, 0); |
3273c2e8 | 595 | struct efx_tx_queue *tx_queue; |
78c1f0a0 | 596 | int rc = 0; |
3273c2e8 | 597 | |
8c8661e4 BH |
598 | /* Set the port loopback_selftest member. From this point on |
599 | * all received packets will be dropped. Mark the state as | |
600 | * "flushing" so all inflight packets are dropped */ | |
601 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
602 | if (state == NULL) | |
603 | return -ENOMEM; | |
604 | BUG_ON(efx->loopback_selftest); | |
605 | state->flush = true; | |
606 | efx->loopback_selftest = state; | |
3273c2e8 BH |
607 | |
608 | /* Test all supported loopback modes */ | |
8c8661e4 | 609 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
610 | if (!(loopback_modes & (1 << mode))) |
611 | continue; | |
612 | ||
613 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 614 | state->flush = true; |
78c1f0a0 | 615 | mutex_lock(&efx->mac_lock); |
3273c2e8 | 616 | efx->loopback_mode = mode; |
78c1f0a0 SH |
617 | rc = __efx_reconfigure_port(efx); |
618 | mutex_unlock(&efx->mac_lock); | |
619 | if (rc) { | |
62776d03 BH |
620 | netif_err(efx, drv, efx->net_dev, |
621 | "unable to move into %s loopback\n", | |
622 | LOOPBACK_MODE(efx)); | |
78c1f0a0 SH |
623 | goto out; |
624 | } | |
3273c2e8 | 625 | |
78c1f0a0 SH |
626 | rc = efx_wait_for_link(efx); |
627 | if (rc) { | |
62776d03 BH |
628 | netif_err(efx, drv, efx->net_dev, |
629 | "loopback %s never came up\n", | |
630 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
631 | goto out; |
632 | } | |
633 | ||
94b274bf | 634 | /* Test all enabled types of TX queue */ |
f7d12cdc | 635 | efx_for_each_channel_tx_queue(tx_queue, channel) { |
a4900ac9 BH |
636 | state->offload_csum = (tx_queue->queue & |
637 | EFX_TXQ_TYPE_OFFLOAD); | |
f8ea0b67 BH |
638 | rc = efx_test_loopback(tx_queue, |
639 | &tests->loopback[mode]); | |
3273c2e8 BH |
640 | if (rc) |
641 | goto out; | |
642 | } | |
643 | } | |
644 | ||
645 | out: | |
8c8661e4 | 646 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 647 | state->flush = true; |
8c8661e4 BH |
648 | efx->loopback_selftest = NULL; |
649 | wmb(); | |
650 | kfree(state); | |
3273c2e8 BH |
651 | |
652 | return rc; | |
653 | } | |
654 | ||
655 | /************************************************************************** | |
656 | * | |
2ef3068e | 657 | * Entry point |
3273c2e8 BH |
658 | * |
659 | *************************************************************************/ | |
660 | ||
2ef3068e BH |
661 | int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
662 | unsigned flags) | |
3273c2e8 | 663 | { |
2ef3068e BH |
664 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
665 | int phy_mode = efx->phy_mode; | |
4b988280 | 666 | enum reset_type reset_method = RESET_TYPE_INVISIBLE; |
3273c2e8 | 667 | struct efx_channel *channel; |
2ef3068e BH |
668 | int rc_test = 0, rc_reset = 0, rc; |
669 | ||
670 | /* Online (i.e. non-disruptive) testing | |
671 | * This checks interrupt generation, event delivery and PHY presence. */ | |
8c8661e4 | 672 | |
4f16c073 | 673 | rc = efx_test_phy_alive(efx, tests); |
2ef3068e BH |
674 | if (rc && !rc_test) |
675 | rc_test = rc; | |
8c8661e4 BH |
676 | |
677 | rc = efx_test_nvram(efx, tests); | |
2ef3068e BH |
678 | if (rc && !rc_test) |
679 | rc_test = rc; | |
3273c2e8 | 680 | |
f8ea0b67 | 681 | rc = efx_test_interrupts(efx, tests); |
2ef3068e BH |
682 | if (rc && !rc_test) |
683 | rc_test = rc; | |
8c8661e4 | 684 | |
3273c2e8 | 685 | efx_for_each_channel(channel, efx) { |
64ee3120 | 686 | rc = efx_test_eventq_irq(channel, tests); |
2ef3068e BH |
687 | if (rc && !rc_test) |
688 | rc_test = rc; | |
3273c2e8 | 689 | } |
8c8661e4 | 690 | |
2ef3068e BH |
691 | if (rc_test) |
692 | return rc_test; | |
3273c2e8 | 693 | |
2ef3068e | 694 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 695 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
696 | |
697 | /* Offline (i.e. disruptive) testing | |
698 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 | 699 | |
e4abce85 BH |
700 | /* Detach the device so the kernel doesn't transmit during the |
701 | * loopback test and the watchdog timeout doesn't fire. | |
8c8661e4 | 702 | */ |
e4abce85 BH |
703 | netif_device_detach(efx->net_dev); |
704 | ||
8c8661e4 | 705 | mutex_lock(&efx->mac_lock); |
6f158d5f BH |
706 | if (efx->loopback_modes) { |
707 | /* We need the 312 clock from the PHY to test the XMAC | |
708 | * registers, so move into XGMII loopback if available */ | |
709 | if (efx->loopback_modes & (1 << LOOPBACK_XGMII)) | |
710 | efx->loopback_mode = LOOPBACK_XGMII; | |
711 | else | |
712 | efx->loopback_mode = __ffs(efx->loopback_modes); | |
713 | } | |
714 | ||
8c8661e4 BH |
715 | __efx_reconfigure_port(efx); |
716 | mutex_unlock(&efx->mac_lock); | |
717 | ||
718 | /* free up all consumers of SRAM (including all the queues) */ | |
d3245b28 | 719 | efx_reset_down(efx, reset_method); |
8c8661e4 BH |
720 | |
721 | rc = efx_test_chip(efx, tests); | |
2ef3068e BH |
722 | if (rc && !rc_test) |
723 | rc_test = rc; | |
8c8661e4 BH |
724 | |
725 | /* reset the chip to recover from the register test */ | |
ef2b90ee | 726 | rc_reset = efx->type->reset(efx, reset_method); |
8c8661e4 | 727 | |
a5692e49 BH |
728 | /* Ensure that the phy is powered and out of loopback |
729 | * for the bist and loopback tests */ | |
730 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; | |
8c8661e4 | 731 | efx->loopback_mode = LOOPBACK_NONE; |
3273c2e8 | 732 | |
d3245b28 | 733 | rc = efx_reset_up(efx, reset_method, rc_reset == 0); |
2ef3068e BH |
734 | if (rc && !rc_reset) |
735 | rc_reset = rc; | |
736 | ||
737 | if (rc_reset) { | |
62776d03 BH |
738 | netif_err(efx, drv, efx->net_dev, |
739 | "Unable to recover from chip test\n"); | |
8c8661e4 | 740 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); |
2ef3068e | 741 | return rc_reset; |
8c8661e4 | 742 | } |
3273c2e8 | 743 | |
1796721a | 744 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
745 | if (rc && !rc_test) |
746 | rc_test = rc; | |
3273c2e8 | 747 | |
2ef3068e BH |
748 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
749 | if (rc && !rc_test) | |
750 | rc_test = rc; | |
3273c2e8 | 751 | |
8c8661e4 | 752 | /* restore the PHY to the previous state */ |
d3245b28 | 753 | mutex_lock(&efx->mac_lock); |
8c8661e4 | 754 | efx->phy_mode = phy_mode; |
d3245b28 BH |
755 | efx->loopback_mode = loopback_mode; |
756 | __efx_reconfigure_port(efx); | |
757 | mutex_unlock(&efx->mac_lock); | |
8c8661e4 | 758 | |
e4abce85 | 759 | netif_device_attach(efx->net_dev); |
9d1aea62 | 760 | |
2ef3068e | 761 | return rc_test; |
3273c2e8 BH |
762 | } |
763 |