]>
Commit | Line | Data |
---|---|---|
3273c2e8 | 1 | /**************************************************************************** |
f7a6d2c4 | 2 | * Driver for Solarflare network controllers and boards |
3273c2e8 | 3 | * Copyright 2005-2006 Fen Systems Ltd. |
f7a6d2c4 | 4 | * Copyright 2006-2012 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 | 27 | |
93e5dfa5 BH |
28 | /* IRQ latency can be enormous because: |
29 | * - All IRQs may be disabled on a CPU for a *long* time by e.g. a | |
30 | * slow serial console or an old IDE driver doing error recovery | |
31 | * - The PREEMPT_RT patches mostly deal with this, but also allow a | |
32 | * tasklet or normal task to be given higher priority than our IRQ | |
33 | * threads | |
34 | * Try to avoid blaming the hardware for this. | |
35 | */ | |
36 | #define IRQ_TIMEOUT HZ | |
37 | ||
3273c2e8 BH |
38 | /* |
39 | * Loopback test packet structure | |
40 | * | |
41 | * The self-test should stress every RSS vector, and unfortunately | |
42 | * Falcon only performs RSS on TCP/UDP packets. | |
43 | */ | |
44 | struct efx_loopback_payload { | |
45 | struct ethhdr header; | |
46 | struct iphdr ip; | |
47 | struct udphdr udp; | |
48 | __be16 iteration; | |
49 | const char msg[64]; | |
ba2d3587 | 50 | } __packed; |
3273c2e8 BH |
51 | |
52 | /* Loopback test source MAC address */ | |
53 | static const unsigned char payload_source[ETH_ALEN] = { | |
54 | 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b, | |
55 | }; | |
56 | ||
94de803d | 57 | static const char payload_msg[] = |
3273c2e8 BH |
58 | "Hello world! This is an Efx loopback test in progress!"; |
59 | ||
d215697f | 60 | /* Interrupt mode names */ |
61 | static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; | |
18e83e4c | 62 | static const char *const efx_interrupt_mode_names[] = { |
d215697f | 63 | [EFX_INT_MODE_MSIX] = "MSI-X", |
64 | [EFX_INT_MODE_MSI] = "MSI", | |
65 | [EFX_INT_MODE_LEGACY] = "legacy", | |
66 | }; | |
67 | #define INT_MODE(efx) \ | |
68 | STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode) | |
69 | ||
3273c2e8 | 70 | /** |
8c8661e4 | 71 | * efx_loopback_state - persistent state during a loopback selftest |
3273c2e8 BH |
72 | * @flush: Drop all packets in efx_loopback_rx_packet |
73 | * @packet_count: Number of packets being used in this test | |
74 | * @skbs: An array of skbs transmitted | |
f30eb23e | 75 | * @offload_csum: Checksums are being offloaded |
3273c2e8 BH |
76 | * @rx_good: RX good packet count |
77 | * @rx_bad: RX bad packet count | |
78 | * @payload: Payload used in tests | |
79 | */ | |
8c8661e4 | 80 | struct efx_loopback_state { |
dc8cfa55 | 81 | bool flush; |
3273c2e8 BH |
82 | int packet_count; |
83 | struct sk_buff **skbs; | |
dc8cfa55 | 84 | bool offload_csum; |
3273c2e8 BH |
85 | atomic_t rx_good; |
86 | atomic_t rx_bad; | |
87 | struct efx_loopback_payload payload; | |
88 | }; | |
89 | ||
93e5dfa5 BH |
90 | /* How long to wait for all the packets to arrive (in ms) */ |
91 | #define LOOPBACK_TIMEOUT_MS 1000 | |
92 | ||
3273c2e8 BH |
93 | /************************************************************************** |
94 | * | |
8c8661e4 | 95 | * MII, NVRAM and register tests |
3273c2e8 BH |
96 | * |
97 | **************************************************************************/ | |
98 | ||
4f16c073 | 99 | static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests) |
8c8661e4 BH |
100 | { |
101 | int rc = 0; | |
8c8661e4 | 102 | |
4f16c073 BH |
103 | if (efx->phy_op->test_alive) { |
104 | rc = efx->phy_op->test_alive(efx); | |
105 | tests->phy_alive = rc ? -1 : 1; | |
8c8661e4 BH |
106 | } |
107 | ||
8c8661e4 BH |
108 | return rc; |
109 | } | |
110 | ||
111 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
112 | { | |
0aa3fbaa BH |
113 | int rc = 0; |
114 | ||
115 | if (efx->type->test_nvram) { | |
116 | rc = efx->type->test_nvram(efx); | |
117 | tests->nvram = rc ? -1 : 1; | |
118 | } | |
8c8661e4 | 119 | |
8c8661e4 BH |
120 | return rc; |
121 | } | |
122 | ||
3273c2e8 BH |
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 | { | |
93e5dfa5 | 133 | unsigned long timeout, wait; |
1646a6f3 BH |
134 | int cpu; |
135 | ||
62776d03 | 136 | netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); |
3273c2e8 BH |
137 | tests->interrupt = -1; |
138 | ||
eee6f6a9 | 139 | efx_nic_irq_test_start(efx); |
93e5dfa5 BH |
140 | timeout = jiffies + IRQ_TIMEOUT; |
141 | wait = 1; | |
3273c2e8 BH |
142 | |
143 | /* Wait for arrival of test interrupt. */ | |
62776d03 | 144 | netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n"); |
93e5dfa5 BH |
145 | do { |
146 | schedule_timeout_uninterruptible(wait); | |
eee6f6a9 | 147 | cpu = efx_nic_irq_test_irq_cpu(efx); |
93e5dfa5 BH |
148 | if (cpu >= 0) |
149 | goto success; | |
150 | wait *= 2; | |
151 | } while (time_before(jiffies, timeout)); | |
3273c2e8 | 152 | |
62776d03 | 153 | netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); |
3273c2e8 BH |
154 | return -ETIMEDOUT; |
155 | ||
156 | success: | |
62776d03 | 157 | netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", |
1646a6f3 | 158 | INT_MODE(efx), cpu); |
3273c2e8 BH |
159 | tests->interrupt = 1; |
160 | return 0; | |
161 | } | |
162 | ||
3273c2e8 | 163 | /* Test generation and receipt of interrupting events */ |
ed74f480 | 164 | static int efx_test_eventq_irq(struct efx_nic *efx, |
3273c2e8 BH |
165 | struct efx_self_tests *tests) |
166 | { | |
ed74f480 BH |
167 | struct efx_channel *channel; |
168 | unsigned int read_ptr[EFX_MAX_CHANNELS]; | |
169 | unsigned long napi_ran = 0, dma_pend = 0, int_pend = 0; | |
93e5dfa5 | 170 | unsigned long timeout, wait; |
3273c2e8 | 171 | |
ed74f480 BH |
172 | BUILD_BUG_ON(EFX_MAX_CHANNELS > BITS_PER_LONG); |
173 | ||
174 | efx_for_each_channel(channel, efx) { | |
175 | read_ptr[channel->channel] = channel->eventq_read_ptr; | |
176 | set_bit(channel->channel, &dma_pend); | |
177 | set_bit(channel->channel, &int_pend); | |
eee6f6a9 | 178 | efx_nic_event_test_start(channel); |
ed74f480 | 179 | } |
3273c2e8 | 180 | |
93e5dfa5 BH |
181 | timeout = jiffies + IRQ_TIMEOUT; |
182 | wait = 1; | |
3273c2e8 | 183 | |
ed74f480 | 184 | /* Wait for arrival of interrupts. NAPI processing may or may |
0fb53faa BH |
185 | * not complete in time, but we can cope in any case. |
186 | */ | |
93e5dfa5 BH |
187 | do { |
188 | schedule_timeout_uninterruptible(wait); | |
189 | ||
ed74f480 BH |
190 | efx_for_each_channel(channel, efx) { |
191 | napi_disable(&channel->napi_str); | |
192 | if (channel->eventq_read_ptr != | |
193 | read_ptr[channel->channel]) { | |
194 | set_bit(channel->channel, &napi_ran); | |
195 | clear_bit(channel->channel, &dma_pend); | |
196 | clear_bit(channel->channel, &int_pend); | |
197 | } else { | |
198 | if (efx_nic_event_present(channel)) | |
199 | clear_bit(channel->channel, &dma_pend); | |
eee6f6a9 | 200 | if (efx_nic_event_test_irq_cpu(channel) >= 0) |
ed74f480 BH |
201 | clear_bit(channel->channel, &int_pend); |
202 | } | |
203 | napi_enable(&channel->napi_str); | |
204 | efx_nic_eventq_read_ack(channel); | |
93e5dfa5 | 205 | } |
93e5dfa5 BH |
206 | |
207 | wait *= 2; | |
ed74f480 | 208 | } while ((dma_pend || int_pend) && time_before(jiffies, timeout)); |
0fb53faa | 209 | |
ed74f480 BH |
210 | efx_for_each_channel(channel, efx) { |
211 | bool dma_seen = !test_bit(channel->channel, &dma_pend); | |
212 | bool int_seen = !test_bit(channel->channel, &int_pend); | |
213 | ||
214 | tests->eventq_dma[channel->channel] = dma_seen ? 1 : -1; | |
215 | tests->eventq_int[channel->channel] = int_seen ? 1 : -1; | |
216 | ||
217 | if (dma_seen && int_seen) { | |
218 | netif_dbg(efx, drv, efx->net_dev, | |
219 | "channel %d event queue passed (with%s NAPI)\n", | |
220 | channel->channel, | |
221 | test_bit(channel->channel, &napi_ran) ? | |
222 | "" : "out"); | |
223 | } else { | |
224 | /* Report failure and whether either interrupt or DMA | |
225 | * worked | |
226 | */ | |
0fb53faa | 227 | netif_err(efx, drv, efx->net_dev, |
ed74f480 | 228 | "channel %d timed out waiting for event queue\n", |
0fb53faa | 229 | channel->channel); |
ed74f480 BH |
230 | if (int_seen) |
231 | netif_err(efx, drv, efx->net_dev, | |
232 | "channel %d saw interrupt " | |
233 | "during event queue test\n", | |
234 | channel->channel); | |
235 | if (dma_seen) | |
236 | netif_err(efx, drv, efx->net_dev, | |
237 | "channel %d event was generated, but " | |
238 | "failed to trigger an interrupt\n", | |
239 | channel->channel); | |
240 | } | |
3273c2e8 | 241 | } |
ed74f480 BH |
242 | |
243 | return (dma_pend || int_pend) ? -ETIMEDOUT : 0; | |
3273c2e8 BH |
244 | } |
245 | ||
1796721a BH |
246 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
247 | unsigned flags) | |
3273c2e8 | 248 | { |
8c8661e4 | 249 | int rc; |
3273c2e8 | 250 | |
1796721a | 251 | if (!efx->phy_op->run_tests) |
3273c2e8 | 252 | return 0; |
3273c2e8 | 253 | |
8c8661e4 | 254 | mutex_lock(&efx->mac_lock); |
4f16c073 | 255 | rc = efx->phy_op->run_tests(efx, tests->phy_ext, flags); |
8c8661e4 | 256 | mutex_unlock(&efx->mac_lock); |
8c8661e4 | 257 | return rc; |
3273c2e8 BH |
258 | } |
259 | ||
260 | /************************************************************************** | |
261 | * | |
262 | * Loopback testing | |
263 | * NB Only one loopback test can be executing concurrently. | |
264 | * | |
265 | **************************************************************************/ | |
266 | ||
267 | /* Loopback test RX callback | |
268 | * This is called for each received packet during loopback testing. | |
269 | */ | |
270 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
271 | const char *buf_ptr, int pkt_len) | |
272 | { | |
8c8661e4 | 273 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
274 | struct efx_loopback_payload *received; |
275 | struct efx_loopback_payload *payload; | |
276 | ||
277 | BUG_ON(!buf_ptr); | |
278 | ||
279 | /* If we are just flushing, then drop the packet */ | |
280 | if ((state == NULL) || state->flush) | |
281 | return; | |
282 | ||
283 | payload = &state->payload; | |
8c8661e4 | 284 | |
d3208b5e | 285 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 286 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
287 | if (state->offload_csum) |
288 | received->ip.check = payload->ip.check; | |
289 | ||
3273c2e8 BH |
290 | /* Check that header exists */ |
291 | if (pkt_len < sizeof(received->header)) { | |
62776d03 BH |
292 | netif_err(efx, drv, efx->net_dev, |
293 | "saw runt RX packet (length %d) in %s loopback " | |
294 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
295 | goto err; |
296 | } | |
297 | ||
298 | /* Check that the ethernet header exists */ | |
299 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
62776d03 BH |
300 | netif_err(efx, drv, efx->net_dev, |
301 | "saw non-loopback RX packet in %s loopback test\n", | |
302 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
303 | goto err; |
304 | } | |
305 | ||
306 | /* Check packet length */ | |
307 | if (pkt_len != sizeof(*payload)) { | |
62776d03 BH |
308 | netif_err(efx, drv, efx->net_dev, |
309 | "saw incorrect RX packet length %d (wanted %d) in " | |
310 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
311 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
312 | goto err; |
313 | } | |
314 | ||
315 | /* Check that IP header matches */ | |
316 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
62776d03 BH |
317 | netif_err(efx, drv, efx->net_dev, |
318 | "saw corrupted IP header in %s loopback test\n", | |
319 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
320 | goto err; |
321 | } | |
322 | ||
323 | /* Check that msg and padding matches */ | |
324 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
62776d03 BH |
325 | netif_err(efx, drv, efx->net_dev, |
326 | "saw corrupted RX packet in %s loopback test\n", | |
327 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
328 | goto err; |
329 | } | |
330 | ||
331 | /* Check that iteration matches */ | |
332 | if (received->iteration != payload->iteration) { | |
62776d03 BH |
333 | netif_err(efx, drv, efx->net_dev, |
334 | "saw RX packet from iteration %d (wanted %d) in " | |
335 | "%s loopback test\n", ntohs(received->iteration), | |
336 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
337 | goto err; |
338 | } | |
339 | ||
340 | /* Increase correct RX count */ | |
62776d03 BH |
341 | netif_vdbg(efx, drv, efx->net_dev, |
342 | "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
343 | |
344 | atomic_inc(&state->rx_good); | |
345 | return; | |
346 | ||
347 | err: | |
5f3f9d6c | 348 | #ifdef DEBUG |
3273c2e8 | 349 | if (atomic_read(&state->rx_bad) == 0) { |
62776d03 | 350 | netif_err(efx, drv, efx->net_dev, "received packet:\n"); |
3273c2e8 BH |
351 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
352 | buf_ptr, pkt_len, 0); | |
62776d03 | 353 | netif_err(efx, drv, efx->net_dev, "expected packet:\n"); |
3273c2e8 BH |
354 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
355 | &state->payload, sizeof(state->payload), 0); | |
356 | } | |
357 | #endif | |
358 | atomic_inc(&state->rx_bad); | |
359 | } | |
360 | ||
361 | /* Initialise an efx_selftest_state for a new iteration */ | |
362 | static void efx_iterate_state(struct efx_nic *efx) | |
363 | { | |
8c8661e4 | 364 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
365 | struct net_device *net_dev = efx->net_dev; |
366 | struct efx_loopback_payload *payload = &state->payload; | |
367 | ||
368 | /* Initialise the layerII header */ | |
369 | memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN); | |
370 | memcpy(&payload->header.h_source, &payload_source, ETH_ALEN); | |
371 | payload->header.h_proto = htons(ETH_P_IP); | |
372 | ||
373 | /* saddr set later and used as incrementing count */ | |
374 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
375 | payload->ip.ihl = 5; | |
3f978ef3 | 376 | payload->ip.check = (__force __sum16) htons(0xdead); |
3273c2e8 BH |
377 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); |
378 | payload->ip.version = IPVERSION; | |
379 | payload->ip.protocol = IPPROTO_UDP; | |
380 | ||
381 | /* Initialise udp header */ | |
382 | payload->udp.source = 0; | |
383 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
384 | sizeof(struct iphdr)); | |
385 | payload->udp.check = 0; /* checksum ignored */ | |
386 | ||
387 | /* Fill out payload */ | |
388 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
389 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
390 | ||
391 | /* Fill out remaining state members */ | |
392 | atomic_set(&state->rx_good, 0); | |
393 | atomic_set(&state->rx_bad, 0); | |
394 | smp_wmb(); | |
395 | } | |
396 | ||
b9aafb0e | 397 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
398 | { |
399 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 400 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
401 | struct efx_loopback_payload *payload; |
402 | struct sk_buff *skb; | |
61357325 SH |
403 | int i; |
404 | netdev_tx_t rc; | |
3273c2e8 BH |
405 | |
406 | /* Transmit N copies of buffer */ | |
407 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 408 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
409 | * transmit completion counting */ |
410 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
411 | if (!skb) | |
412 | return -ENOMEM; | |
413 | state->skbs[i] = skb; | |
414 | skb_get(skb); | |
415 | ||
416 | /* Copy the payload in, incrementing the source address to | |
417 | * exercise the rss vectors */ | |
418 | payload = ((struct efx_loopback_payload *) | |
419 | skb_put(skb, sizeof(state->payload))); | |
420 | memcpy(payload, &state->payload, sizeof(state->payload)); | |
421 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
422 | ||
423 | /* Ensure everything we've written is visible to the | |
424 | * interrupt handler. */ | |
425 | smp_wmb(); | |
426 | ||
73ba7b68 | 427 | netif_tx_lock_bh(efx->net_dev); |
497f5ba3 | 428 | rc = efx_enqueue_skb(tx_queue, skb); |
73ba7b68 | 429 | netif_tx_unlock_bh(efx->net_dev); |
3273c2e8 BH |
430 | |
431 | if (rc != NETDEV_TX_OK) { | |
62776d03 BH |
432 | netif_err(efx, drv, efx->net_dev, |
433 | "TX queue %d could not transmit packet %d of " | |
434 | "%d in %s loopback test\n", tx_queue->queue, | |
435 | i + 1, state->packet_count, | |
436 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
437 | |
438 | /* Defer cleaning up the other skbs for the caller */ | |
439 | kfree_skb(skb); | |
440 | return -EPIPE; | |
441 | } | |
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 | 450 | |
b9aafb0e BH |
451 | return atomic_read(&state->rx_good) == state->packet_count; |
452 | } | |
453 | ||
454 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
455 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
456 | { |
457 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 458 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
459 | struct sk_buff *skb; |
460 | int tx_done = 0, rx_good, rx_bad; | |
461 | int i, rc = 0; | |
462 | ||
73ba7b68 | 463 | netif_tx_lock_bh(efx->net_dev); |
3273c2e8 BH |
464 | |
465 | /* Count the number of tx completions, and decrement the refcnt. Any | |
466 | * skbs not already completed will be free'd when the queue is flushed */ | |
9c636baf | 467 | for (i = 0; i < state->packet_count; i++) { |
3273c2e8 BH |
468 | skb = state->skbs[i]; |
469 | if (skb && !skb_shared(skb)) | |
470 | ++tx_done; | |
e3ed2bdf | 471 | dev_kfree_skb(skb); |
3273c2e8 BH |
472 | } |
473 | ||
73ba7b68 | 474 | netif_tx_unlock_bh(efx->net_dev); |
3273c2e8 BH |
475 | |
476 | /* Check TX completion and received packet counts */ | |
477 | rx_good = atomic_read(&state->rx_good); | |
478 | rx_bad = atomic_read(&state->rx_bad); | |
479 | if (tx_done != state->packet_count) { | |
480 | /* Don't free the skbs; they will be picked up on TX | |
481 | * overflow or channel teardown. | |
482 | */ | |
62776d03 BH |
483 | netif_err(efx, drv, efx->net_dev, |
484 | "TX queue %d saw only %d out of an expected %d " | |
485 | "TX completion events in %s loopback test\n", | |
486 | tx_queue->queue, tx_done, state->packet_count, | |
487 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
488 | rc = -ETIMEDOUT; |
489 | /* Allow to fall through so we see the RX errors as well */ | |
490 | } | |
491 | ||
492 | /* We may always be up to a flush away from our desired packet total */ | |
493 | if (rx_good != state->packet_count) { | |
62776d03 BH |
494 | netif_dbg(efx, drv, efx->net_dev, |
495 | "TX queue %d saw only %d out of an expected %d " | |
496 | "received packets in %s loopback test\n", | |
497 | tx_queue->queue, rx_good, state->packet_count, | |
498 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
499 | rc = -ETIMEDOUT; |
500 | /* Fall through */ | |
501 | } | |
502 | ||
503 | /* Update loopback test structure */ | |
504 | lb_tests->tx_sent[tx_queue->queue] += state->packet_count; | |
505 | lb_tests->tx_done[tx_queue->queue] += tx_done; | |
506 | lb_tests->rx_good += rx_good; | |
507 | lb_tests->rx_bad += rx_bad; | |
508 | ||
509 | return rc; | |
510 | } | |
511 | ||
512 | static int | |
513 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
514 | struct efx_loopback_self_tests *lb_tests) | |
515 | { | |
516 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 517 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 518 | int i, begin_rc, end_rc; |
3273c2e8 | 519 | |
8c8661e4 | 520 | for (i = 0; i < 3; i++) { |
3273c2e8 | 521 | /* Determine how many packets to send */ |
ecc910f5 | 522 | state->packet_count = efx->txq_entries / 3; |
3273c2e8 | 523 | state->packet_count = min(1 << (i << 2), state->packet_count); |
c2e4e25a TM |
524 | state->skbs = kcalloc(state->packet_count, |
525 | sizeof(state->skbs[0]), GFP_KERNEL); | |
9b7bfc4c BH |
526 | if (!state->skbs) |
527 | return -ENOMEM; | |
dc8cfa55 | 528 | state->flush = false; |
3273c2e8 | 529 | |
62776d03 BH |
530 | netif_dbg(efx, drv, efx->net_dev, |
531 | "TX queue %d testing %s loopback with %d packets\n", | |
532 | tx_queue->queue, LOOPBACK_MODE(efx), | |
533 | state->packet_count); | |
3273c2e8 BH |
534 | |
535 | efx_iterate_state(efx); | |
b9aafb0e BH |
536 | begin_rc = efx_begin_loopback(tx_queue); |
537 | ||
538 | /* This will normally complete very quickly, but be | |
93e5dfa5 | 539 | * prepared to wait much longer. */ |
b9aafb0e BH |
540 | msleep(1); |
541 | if (!efx_poll_loopback(efx)) { | |
93e5dfa5 | 542 | msleep(LOOPBACK_TIMEOUT_MS); |
b9aafb0e | 543 | efx_poll_loopback(efx); |
3273c2e8 BH |
544 | } |
545 | ||
b9aafb0e | 546 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
547 | kfree(state->skbs); |
548 | ||
b9aafb0e | 549 | if (begin_rc || end_rc) { |
3273c2e8 BH |
550 | /* Wait a while to ensure there are no packets |
551 | * floating around after a failure. */ | |
552 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 553 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
554 | } |
555 | } | |
556 | ||
62776d03 BH |
557 | netif_dbg(efx, drv, efx->net_dev, |
558 | "TX queue %d passed %s loopback test with a burst length " | |
559 | "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
560 | state->packet_count); | |
3273c2e8 | 561 | |
a0c2c190 | 562 | return 0; |
3273c2e8 BH |
563 | } |
564 | ||
78c1f0a0 SH |
565 | /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
566 | * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it | |
567 | * to delay and retry. Therefore, it's safer to just poll directly. Wait | |
568 | * for link up and any faults to dissipate. */ | |
569 | static int efx_wait_for_link(struct efx_nic *efx) | |
570 | { | |
571 | struct efx_link_state *link_state = &efx->link_state; | |
901d3fe8 | 572 | int count, link_up_count = 0; |
78c1f0a0 SH |
573 | bool link_up; |
574 | ||
575 | for (count = 0; count < 40; count++) { | |
576 | schedule_timeout_uninterruptible(HZ / 10); | |
577 | ||
578 | if (efx->type->monitor != NULL) { | |
579 | mutex_lock(&efx->mac_lock); | |
580 | efx->type->monitor(efx); | |
581 | mutex_unlock(&efx->mac_lock); | |
78c1f0a0 SH |
582 | } |
583 | ||
584 | mutex_lock(&efx->mac_lock); | |
585 | link_up = link_state->up; | |
586 | if (link_up) | |
710b208d | 587 | link_up = !efx->type->check_mac_fault(efx); |
78c1f0a0 SH |
588 | mutex_unlock(&efx->mac_lock); |
589 | ||
901d3fe8 SH |
590 | if (link_up) { |
591 | if (++link_up_count == 2) | |
592 | return 0; | |
593 | } else { | |
594 | link_up_count = 0; | |
595 | } | |
78c1f0a0 SH |
596 | } |
597 | ||
598 | return -ETIMEDOUT; | |
599 | } | |
600 | ||
a5692e49 | 601 | static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
3273c2e8 BH |
602 | unsigned int loopback_modes) |
603 | { | |
8c8661e4 BH |
604 | enum efx_loopback_mode mode; |
605 | struct efx_loopback_state *state; | |
1ac0226e BH |
606 | struct efx_channel *channel = |
607 | efx_get_channel(efx, efx->tx_channel_offset); | |
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 | ||
94b274bf | 647 | /* Test all enabled 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; | |
d4f2cecc | 679 | int rc_test = 0, rc_reset, rc; |
2ef3068e | 680 | |
dd40781e BH |
681 | efx_selftest_async_cancel(efx); |
682 | ||
2ef3068e BH |
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 | |
ed74f480 BH |
698 | rc = efx_test_eventq_irq(efx, tests); |
699 | if (rc && !rc_test) | |
700 | rc_test = rc; | |
8c8661e4 | 701 | |
2ef3068e BH |
702 | if (rc_test) |
703 | return rc_test; | |
3273c2e8 | 704 | |
2ef3068e | 705 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 706 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
707 | |
708 | /* Offline (i.e. disruptive) testing | |
709 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 | 710 | |
e4abce85 BH |
711 | /* Detach the device so the kernel doesn't transmit during the |
712 | * loopback test and the watchdog timeout doesn't fire. | |
8c8661e4 | 713 | */ |
c2f3b8e3 | 714 | efx_device_detach_sync(efx); |
e4abce85 | 715 | |
d4f2cecc BH |
716 | if (efx->type->test_chip) { |
717 | rc_reset = efx->type->test_chip(efx, tests); | |
718 | if (rc_reset) { | |
719 | netif_err(efx, hw, efx->net_dev, | |
720 | "Unable to recover from chip test\n"); | |
721 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
722 | return rc_reset; | |
723 | } | |
8c8661e4 | 724 | |
74cd60a4 | 725 | if ((tests->memory < 0 || tests->registers < 0) && !rc_test) |
d4f2cecc BH |
726 | rc_test = -EIO; |
727 | } | |
8c8661e4 | 728 | |
a5692e49 BH |
729 | /* Ensure that the phy is powered and out of loopback |
730 | * for the bist and loopback tests */ | |
d4f2cecc | 731 | mutex_lock(&efx->mac_lock); |
a5692e49 | 732 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; |
8c8661e4 | 733 | efx->loopback_mode = LOOPBACK_NONE; |
d4f2cecc BH |
734 | __efx_reconfigure_port(efx); |
735 | mutex_unlock(&efx->mac_lock); | |
3273c2e8 | 736 | |
1796721a | 737 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
738 | if (rc && !rc_test) |
739 | rc_test = rc; | |
3273c2e8 | 740 | |
2ef3068e BH |
741 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
742 | if (rc && !rc_test) | |
743 | rc_test = rc; | |
3273c2e8 | 744 | |
8c8661e4 | 745 | /* restore the PHY to the previous state */ |
d3245b28 | 746 | mutex_lock(&efx->mac_lock); |
8c8661e4 | 747 | efx->phy_mode = phy_mode; |
d3245b28 BH |
748 | efx->loopback_mode = loopback_mode; |
749 | __efx_reconfigure_port(efx); | |
750 | mutex_unlock(&efx->mac_lock); | |
8c8661e4 | 751 | |
e4abce85 | 752 | netif_device_attach(efx->net_dev); |
9d1aea62 | 753 | |
2ef3068e | 754 | return rc_test; |
3273c2e8 BH |
755 | } |
756 | ||
dd40781e BH |
757 | void efx_selftest_async_start(struct efx_nic *efx) |
758 | { | |
759 | struct efx_channel *channel; | |
760 | ||
761 | efx_for_each_channel(channel, efx) | |
762 | efx_nic_event_test_start(channel); | |
763 | schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT); | |
764 | } | |
765 | ||
766 | void efx_selftest_async_cancel(struct efx_nic *efx) | |
767 | { | |
768 | cancel_delayed_work_sync(&efx->selftest_work); | |
769 | } | |
770 | ||
771 | void efx_selftest_async_work(struct work_struct *data) | |
772 | { | |
773 | struct efx_nic *efx = container_of(data, struct efx_nic, | |
774 | selftest_work.work); | |
775 | struct efx_channel *channel; | |
776 | int cpu; | |
777 | ||
778 | efx_for_each_channel(channel, efx) { | |
779 | cpu = efx_nic_event_test_irq_cpu(channel); | |
780 | if (cpu < 0) | |
781 | netif_err(efx, ifup, efx->net_dev, | |
782 | "channel %d failed to trigger an interrupt\n", | |
783 | channel->channel); | |
784 | else | |
785 | netif_dbg(efx, ifup, efx->net_dev, | |
786 | "channel %d triggered interrupt on CPU %d\n", | |
787 | channel->channel, cpu); | |
788 | } | |
789 | } |