Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
3273c2e8 | 2 | /**************************************************************************** |
f7a6d2c4 | 3 | * Driver for Solarflare network controllers and boards |
3273c2e8 | 4 | * Copyright 2005-2006 Fen Systems Ltd. |
f7a6d2c4 | 5 | * Copyright 2006-2012 Solarflare Communications Inc. |
3273c2e8 BH |
6 | */ |
7 | ||
8 | #include <linux/netdevice.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/delay.h> | |
11 | #include <linux/kernel_stat.h> | |
12 | #include <linux/pci.h> | |
13 | #include <linux/ethtool.h> | |
14 | #include <linux/ip.h> | |
15 | #include <linux/in.h> | |
16 | #include <linux/udp.h> | |
17 | #include <linux/rtnetlink.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
3273c2e8 | 19 | #include "net_driver.h" |
3273c2e8 | 20 | #include "efx.h" |
744093c9 | 21 | #include "nic.h" |
3273c2e8 | 22 | #include "selftest.h" |
3273c2e8 | 23 | #include "workarounds.h" |
3273c2e8 | 24 | |
93e5dfa5 BH |
25 | /* IRQ latency can be enormous because: |
26 | * - All IRQs may be disabled on a CPU for a *long* time by e.g. a | |
27 | * slow serial console or an old IDE driver doing error recovery | |
28 | * - The PREEMPT_RT patches mostly deal with this, but also allow a | |
29 | * tasklet or normal task to be given higher priority than our IRQ | |
30 | * threads | |
31 | * Try to avoid blaming the hardware for this. | |
32 | */ | |
33 | #define IRQ_TIMEOUT HZ | |
34 | ||
3273c2e8 BH |
35 | /* |
36 | * Loopback test packet structure | |
37 | * | |
38 | * The self-test should stress every RSS vector, and unfortunately | |
39 | * Falcon only performs RSS on TCP/UDP packets. | |
40 | */ | |
41 | struct efx_loopback_payload { | |
42 | struct ethhdr header; | |
43 | struct iphdr ip; | |
44 | struct udphdr udp; | |
45 | __be16 iteration; | |
1d20a160 | 46 | char msg[64]; |
ba2d3587 | 47 | } __packed; |
3273c2e8 BH |
48 | |
49 | /* Loopback test source MAC address */ | |
cd84ff4d | 50 | static const u8 payload_source[ETH_ALEN] __aligned(2) = { |
3273c2e8 BH |
51 | 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b, |
52 | }; | |
53 | ||
94de803d | 54 | static const char payload_msg[] = |
3273c2e8 BH |
55 | "Hello world! This is an Efx loopback test in progress!"; |
56 | ||
d215697f | 57 | /* Interrupt mode names */ |
58 | static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; | |
18e83e4c | 59 | static const char *const efx_interrupt_mode_names[] = { |
d215697f | 60 | [EFX_INT_MODE_MSIX] = "MSI-X", |
61 | [EFX_INT_MODE_MSI] = "MSI", | |
62 | [EFX_INT_MODE_LEGACY] = "legacy", | |
63 | }; | |
64 | #define INT_MODE(efx) \ | |
65 | STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode) | |
66 | ||
3273c2e8 | 67 | /** |
8c8661e4 | 68 | * efx_loopback_state - persistent state during a loopback selftest |
3273c2e8 BH |
69 | * @flush: Drop all packets in efx_loopback_rx_packet |
70 | * @packet_count: Number of packets being used in this test | |
71 | * @skbs: An array of skbs transmitted | |
f30eb23e | 72 | * @offload_csum: Checksums are being offloaded |
3273c2e8 BH |
73 | * @rx_good: RX good packet count |
74 | * @rx_bad: RX bad packet count | |
75 | * @payload: Payload used in tests | |
76 | */ | |
8c8661e4 | 77 | struct efx_loopback_state { |
dc8cfa55 | 78 | bool flush; |
3273c2e8 BH |
79 | int packet_count; |
80 | struct sk_buff **skbs; | |
dc8cfa55 | 81 | bool offload_csum; |
3273c2e8 BH |
82 | atomic_t rx_good; |
83 | atomic_t rx_bad; | |
84 | struct efx_loopback_payload payload; | |
85 | }; | |
86 | ||
93e5dfa5 BH |
87 | /* How long to wait for all the packets to arrive (in ms) */ |
88 | #define LOOPBACK_TIMEOUT_MS 1000 | |
89 | ||
3273c2e8 BH |
90 | /************************************************************************** |
91 | * | |
8c8661e4 | 92 | * MII, NVRAM and register tests |
3273c2e8 BH |
93 | * |
94 | **************************************************************************/ | |
95 | ||
4f16c073 | 96 | static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests) |
8c8661e4 BH |
97 | { |
98 | int rc = 0; | |
8c8661e4 | 99 | |
4f16c073 BH |
100 | if (efx->phy_op->test_alive) { |
101 | rc = efx->phy_op->test_alive(efx); | |
102 | tests->phy_alive = rc ? -1 : 1; | |
8c8661e4 BH |
103 | } |
104 | ||
8c8661e4 BH |
105 | return rc; |
106 | } | |
107 | ||
108 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
109 | { | |
0aa3fbaa BH |
110 | int rc = 0; |
111 | ||
112 | if (efx->type->test_nvram) { | |
113 | rc = efx->type->test_nvram(efx); | |
27324820 DP |
114 | if (rc == -EPERM) |
115 | rc = 0; | |
116 | else | |
117 | tests->nvram = rc ? -1 : 1; | |
0aa3fbaa | 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 | 134 | int cpu; |
942e298e | 135 | int rc; |
1646a6f3 | 136 | |
62776d03 | 137 | netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); |
3273c2e8 BH |
138 | tests->interrupt = -1; |
139 | ||
942e298e JC |
140 | rc = efx_nic_irq_test_start(efx); |
141 | if (rc == -ENOTSUPP) { | |
142 | netif_dbg(efx, drv, efx->net_dev, | |
143 | "direct interrupt testing not supported\n"); | |
144 | tests->interrupt = 0; | |
145 | return 0; | |
146 | } | |
147 | ||
93e5dfa5 BH |
148 | timeout = jiffies + IRQ_TIMEOUT; |
149 | wait = 1; | |
3273c2e8 BH |
150 | |
151 | /* Wait for arrival of test interrupt. */ | |
62776d03 | 152 | netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n"); |
93e5dfa5 BH |
153 | do { |
154 | schedule_timeout_uninterruptible(wait); | |
eee6f6a9 | 155 | cpu = efx_nic_irq_test_irq_cpu(efx); |
93e5dfa5 BH |
156 | if (cpu >= 0) |
157 | goto success; | |
158 | wait *= 2; | |
159 | } while (time_before(jiffies, timeout)); | |
3273c2e8 | 160 | |
62776d03 | 161 | netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); |
3273c2e8 BH |
162 | return -ETIMEDOUT; |
163 | ||
164 | success: | |
62776d03 | 165 | netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", |
1646a6f3 | 166 | INT_MODE(efx), cpu); |
3273c2e8 BH |
167 | tests->interrupt = 1; |
168 | return 0; | |
169 | } | |
170 | ||
3273c2e8 | 171 | /* Test generation and receipt of interrupting events */ |
ed74f480 | 172 | static int efx_test_eventq_irq(struct efx_nic *efx, |
3273c2e8 BH |
173 | struct efx_self_tests *tests) |
174 | { | |
ed74f480 BH |
175 | struct efx_channel *channel; |
176 | unsigned int read_ptr[EFX_MAX_CHANNELS]; | |
177 | unsigned long napi_ran = 0, dma_pend = 0, int_pend = 0; | |
93e5dfa5 | 178 | unsigned long timeout, wait; |
3273c2e8 | 179 | |
ed74f480 BH |
180 | BUILD_BUG_ON(EFX_MAX_CHANNELS > BITS_PER_LONG); |
181 | ||
182 | efx_for_each_channel(channel, efx) { | |
183 | read_ptr[channel->channel] = channel->eventq_read_ptr; | |
184 | set_bit(channel->channel, &dma_pend); | |
185 | set_bit(channel->channel, &int_pend); | |
eee6f6a9 | 186 | efx_nic_event_test_start(channel); |
ed74f480 | 187 | } |
3273c2e8 | 188 | |
93e5dfa5 BH |
189 | timeout = jiffies + IRQ_TIMEOUT; |
190 | wait = 1; | |
3273c2e8 | 191 | |
ed74f480 | 192 | /* Wait for arrival of interrupts. NAPI processing may or may |
0fb53faa BH |
193 | * not complete in time, but we can cope in any case. |
194 | */ | |
93e5dfa5 BH |
195 | do { |
196 | schedule_timeout_uninterruptible(wait); | |
197 | ||
ed74f480 | 198 | efx_for_each_channel(channel, efx) { |
36763266 | 199 | efx_stop_eventq(channel); |
ed74f480 BH |
200 | if (channel->eventq_read_ptr != |
201 | read_ptr[channel->channel]) { | |
202 | set_bit(channel->channel, &napi_ran); | |
203 | clear_bit(channel->channel, &dma_pend); | |
204 | clear_bit(channel->channel, &int_pend); | |
205 | } else { | |
206 | if (efx_nic_event_present(channel)) | |
207 | clear_bit(channel->channel, &dma_pend); | |
eee6f6a9 | 208 | if (efx_nic_event_test_irq_cpu(channel) >= 0) |
ed74f480 BH |
209 | clear_bit(channel->channel, &int_pend); |
210 | } | |
36763266 | 211 | efx_start_eventq(channel); |
93e5dfa5 | 212 | } |
93e5dfa5 BH |
213 | |
214 | wait *= 2; | |
ed74f480 | 215 | } while ((dma_pend || int_pend) && time_before(jiffies, timeout)); |
0fb53faa | 216 | |
ed74f480 BH |
217 | efx_for_each_channel(channel, efx) { |
218 | bool dma_seen = !test_bit(channel->channel, &dma_pend); | |
219 | bool int_seen = !test_bit(channel->channel, &int_pend); | |
220 | ||
221 | tests->eventq_dma[channel->channel] = dma_seen ? 1 : -1; | |
222 | tests->eventq_int[channel->channel] = int_seen ? 1 : -1; | |
223 | ||
224 | if (dma_seen && int_seen) { | |
225 | netif_dbg(efx, drv, efx->net_dev, | |
226 | "channel %d event queue passed (with%s NAPI)\n", | |
227 | channel->channel, | |
228 | test_bit(channel->channel, &napi_ran) ? | |
229 | "" : "out"); | |
230 | } else { | |
231 | /* Report failure and whether either interrupt or DMA | |
232 | * worked | |
233 | */ | |
0fb53faa | 234 | netif_err(efx, drv, efx->net_dev, |
ed74f480 | 235 | "channel %d timed out waiting for event queue\n", |
0fb53faa | 236 | channel->channel); |
ed74f480 BH |
237 | if (int_seen) |
238 | netif_err(efx, drv, efx->net_dev, | |
239 | "channel %d saw interrupt " | |
240 | "during event queue test\n", | |
241 | channel->channel); | |
242 | if (dma_seen) | |
243 | netif_err(efx, drv, efx->net_dev, | |
244 | "channel %d event was generated, but " | |
245 | "failed to trigger an interrupt\n", | |
246 | channel->channel); | |
247 | } | |
3273c2e8 | 248 | } |
ed74f480 BH |
249 | |
250 | return (dma_pend || int_pend) ? -ETIMEDOUT : 0; | |
3273c2e8 BH |
251 | } |
252 | ||
1796721a BH |
253 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
254 | unsigned flags) | |
3273c2e8 | 255 | { |
8c8661e4 | 256 | int rc; |
3273c2e8 | 257 | |
1796721a | 258 | if (!efx->phy_op->run_tests) |
3273c2e8 | 259 | return 0; |
3273c2e8 | 260 | |
8c8661e4 | 261 | mutex_lock(&efx->mac_lock); |
4f16c073 | 262 | rc = efx->phy_op->run_tests(efx, tests->phy_ext, flags); |
8c8661e4 | 263 | mutex_unlock(&efx->mac_lock); |
27324820 DP |
264 | if (rc == -EPERM) |
265 | rc = 0; | |
266 | else | |
267 | netif_info(efx, drv, efx->net_dev, | |
268 | "%s phy selftest\n", rc ? "Failed" : "Passed"); | |
269 | ||
8c8661e4 | 270 | return rc; |
3273c2e8 BH |
271 | } |
272 | ||
273 | /************************************************************************** | |
274 | * | |
275 | * Loopback testing | |
276 | * NB Only one loopback test can be executing concurrently. | |
277 | * | |
278 | **************************************************************************/ | |
279 | ||
280 | /* Loopback test RX callback | |
281 | * This is called for each received packet during loopback testing. | |
282 | */ | |
283 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
284 | const char *buf_ptr, int pkt_len) | |
285 | { | |
8c8661e4 | 286 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
287 | struct efx_loopback_payload *received; |
288 | struct efx_loopback_payload *payload; | |
289 | ||
290 | BUG_ON(!buf_ptr); | |
291 | ||
292 | /* If we are just flushing, then drop the packet */ | |
293 | if ((state == NULL) || state->flush) | |
294 | return; | |
295 | ||
296 | payload = &state->payload; | |
8c8661e4 | 297 | |
d3208b5e | 298 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 299 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
300 | if (state->offload_csum) |
301 | received->ip.check = payload->ip.check; | |
302 | ||
3273c2e8 BH |
303 | /* Check that header exists */ |
304 | if (pkt_len < sizeof(received->header)) { | |
62776d03 BH |
305 | netif_err(efx, drv, efx->net_dev, |
306 | "saw runt RX packet (length %d) in %s loopback " | |
307 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
308 | goto err; |
309 | } | |
310 | ||
311 | /* Check that the ethernet header exists */ | |
312 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
62776d03 BH |
313 | netif_err(efx, drv, efx->net_dev, |
314 | "saw non-loopback RX packet in %s loopback test\n", | |
315 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
316 | goto err; |
317 | } | |
318 | ||
319 | /* Check packet length */ | |
320 | if (pkt_len != sizeof(*payload)) { | |
62776d03 BH |
321 | netif_err(efx, drv, efx->net_dev, |
322 | "saw incorrect RX packet length %d (wanted %d) in " | |
323 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
324 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
325 | goto err; |
326 | } | |
327 | ||
328 | /* Check that IP header matches */ | |
329 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
62776d03 BH |
330 | netif_err(efx, drv, efx->net_dev, |
331 | "saw corrupted IP header in %s loopback test\n", | |
332 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
333 | goto err; |
334 | } | |
335 | ||
336 | /* Check that msg and padding matches */ | |
337 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
62776d03 BH |
338 | netif_err(efx, drv, efx->net_dev, |
339 | "saw corrupted RX packet in %s loopback test\n", | |
340 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
341 | goto err; |
342 | } | |
343 | ||
344 | /* Check that iteration matches */ | |
345 | if (received->iteration != payload->iteration) { | |
62776d03 BH |
346 | netif_err(efx, drv, efx->net_dev, |
347 | "saw RX packet from iteration %d (wanted %d) in " | |
348 | "%s loopback test\n", ntohs(received->iteration), | |
349 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
350 | goto err; |
351 | } | |
352 | ||
353 | /* Increase correct RX count */ | |
62776d03 BH |
354 | netif_vdbg(efx, drv, efx->net_dev, |
355 | "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
356 | |
357 | atomic_inc(&state->rx_good); | |
358 | return; | |
359 | ||
360 | err: | |
5f3f9d6c | 361 | #ifdef DEBUG |
3273c2e8 | 362 | if (atomic_read(&state->rx_bad) == 0) { |
62776d03 | 363 | netif_err(efx, drv, efx->net_dev, "received packet:\n"); |
3273c2e8 BH |
364 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
365 | buf_ptr, pkt_len, 0); | |
62776d03 | 366 | netif_err(efx, drv, efx->net_dev, "expected packet:\n"); |
3273c2e8 BH |
367 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
368 | &state->payload, sizeof(state->payload), 0); | |
369 | } | |
370 | #endif | |
371 | atomic_inc(&state->rx_bad); | |
372 | } | |
373 | ||
374 | /* Initialise an efx_selftest_state for a new iteration */ | |
375 | static void efx_iterate_state(struct efx_nic *efx) | |
376 | { | |
8c8661e4 | 377 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
378 | struct net_device *net_dev = efx->net_dev; |
379 | struct efx_loopback_payload *payload = &state->payload; | |
380 | ||
381 | /* Initialise the layerII header */ | |
cd84ff4d EC |
382 | ether_addr_copy((u8 *)&payload->header.h_dest, net_dev->dev_addr); |
383 | ether_addr_copy((u8 *)&payload->header.h_source, payload_source); | |
3273c2e8 BH |
384 | payload->header.h_proto = htons(ETH_P_IP); |
385 | ||
386 | /* saddr set later and used as incrementing count */ | |
387 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
388 | payload->ip.ihl = 5; | |
3f978ef3 | 389 | payload->ip.check = (__force __sum16) htons(0xdead); |
3273c2e8 BH |
390 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); |
391 | payload->ip.version = IPVERSION; | |
392 | payload->ip.protocol = IPPROTO_UDP; | |
393 | ||
394 | /* Initialise udp header */ | |
395 | payload->udp.source = 0; | |
396 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
397 | sizeof(struct iphdr)); | |
398 | payload->udp.check = 0; /* checksum ignored */ | |
399 | ||
400 | /* Fill out payload */ | |
401 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
402 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
403 | ||
404 | /* Fill out remaining state members */ | |
405 | atomic_set(&state->rx_good, 0); | |
406 | atomic_set(&state->rx_bad, 0); | |
407 | smp_wmb(); | |
408 | } | |
409 | ||
b9aafb0e | 410 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
411 | { |
412 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 413 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
414 | struct efx_loopback_payload *payload; |
415 | struct sk_buff *skb; | |
61357325 SH |
416 | int i; |
417 | netdev_tx_t rc; | |
3273c2e8 BH |
418 | |
419 | /* Transmit N copies of buffer */ | |
420 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 421 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
422 | * transmit completion counting */ |
423 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
424 | if (!skb) | |
425 | return -ENOMEM; | |
426 | state->skbs[i] = skb; | |
427 | skb_get(skb); | |
428 | ||
429 | /* Copy the payload in, incrementing the source address to | |
430 | * exercise the rss vectors */ | |
4df864c1 | 431 | payload = skb_put(skb, sizeof(state->payload)); |
3273c2e8 BH |
432 | memcpy(payload, &state->payload, sizeof(state->payload)); |
433 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
434 | ||
435 | /* Ensure everything we've written is visible to the | |
436 | * interrupt handler. */ | |
437 | smp_wmb(); | |
438 | ||
73ba7b68 | 439 | netif_tx_lock_bh(efx->net_dev); |
497f5ba3 | 440 | rc = efx_enqueue_skb(tx_queue, skb); |
73ba7b68 | 441 | netif_tx_unlock_bh(efx->net_dev); |
3273c2e8 BH |
442 | |
443 | if (rc != NETDEV_TX_OK) { | |
62776d03 BH |
444 | netif_err(efx, drv, efx->net_dev, |
445 | "TX queue %d could not transmit packet %d of " | |
446 | "%d in %s loopback test\n", tx_queue->queue, | |
447 | i + 1, state->packet_count, | |
448 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
449 | |
450 | /* Defer cleaning up the other skbs for the caller */ | |
451 | kfree_skb(skb); | |
452 | return -EPIPE; | |
453 | } | |
454 | } | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
b9aafb0e BH |
459 | static int efx_poll_loopback(struct efx_nic *efx) |
460 | { | |
8c8661e4 | 461 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 462 | |
b9aafb0e BH |
463 | return atomic_read(&state->rx_good) == state->packet_count; |
464 | } | |
465 | ||
466 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
467 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
468 | { |
469 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 470 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
471 | struct sk_buff *skb; |
472 | int tx_done = 0, rx_good, rx_bad; | |
473 | int i, rc = 0; | |
474 | ||
73ba7b68 | 475 | netif_tx_lock_bh(efx->net_dev); |
3273c2e8 BH |
476 | |
477 | /* Count the number of tx completions, and decrement the refcnt. Any | |
478 | * skbs not already completed will be free'd when the queue is flushed */ | |
9c636baf | 479 | for (i = 0; i < state->packet_count; i++) { |
3273c2e8 BH |
480 | skb = state->skbs[i]; |
481 | if (skb && !skb_shared(skb)) | |
482 | ++tx_done; | |
e3ed2bdf | 483 | dev_kfree_skb(skb); |
3273c2e8 BH |
484 | } |
485 | ||
73ba7b68 | 486 | netif_tx_unlock_bh(efx->net_dev); |
3273c2e8 BH |
487 | |
488 | /* Check TX completion and received packet counts */ | |
489 | rx_good = atomic_read(&state->rx_good); | |
490 | rx_bad = atomic_read(&state->rx_bad); | |
491 | if (tx_done != state->packet_count) { | |
492 | /* Don't free the skbs; they will be picked up on TX | |
493 | * overflow or channel teardown. | |
494 | */ | |
62776d03 BH |
495 | netif_err(efx, drv, efx->net_dev, |
496 | "TX queue %d saw only %d out of an expected %d " | |
497 | "TX completion events in %s loopback test\n", | |
498 | tx_queue->queue, tx_done, state->packet_count, | |
499 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
500 | rc = -ETIMEDOUT; |
501 | /* Allow to fall through so we see the RX errors as well */ | |
502 | } | |
503 | ||
504 | /* We may always be up to a flush away from our desired packet total */ | |
505 | if (rx_good != state->packet_count) { | |
62776d03 BH |
506 | netif_dbg(efx, drv, efx->net_dev, |
507 | "TX queue %d saw only %d out of an expected %d " | |
508 | "received packets in %s loopback test\n", | |
509 | tx_queue->queue, rx_good, state->packet_count, | |
510 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
511 | rc = -ETIMEDOUT; |
512 | /* Fall through */ | |
513 | } | |
514 | ||
515 | /* Update loopback test structure */ | |
516 | lb_tests->tx_sent[tx_queue->queue] += state->packet_count; | |
517 | lb_tests->tx_done[tx_queue->queue] += tx_done; | |
518 | lb_tests->rx_good += rx_good; | |
519 | lb_tests->rx_bad += rx_bad; | |
520 | ||
521 | return rc; | |
522 | } | |
523 | ||
524 | static int | |
525 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
526 | struct efx_loopback_self_tests *lb_tests) | |
527 | { | |
528 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 529 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 530 | int i, begin_rc, end_rc; |
3273c2e8 | 531 | |
8c8661e4 | 532 | for (i = 0; i < 3; i++) { |
3273c2e8 | 533 | /* Determine how many packets to send */ |
ecc910f5 | 534 | state->packet_count = efx->txq_entries / 3; |
3273c2e8 | 535 | state->packet_count = min(1 << (i << 2), state->packet_count); |
c2e4e25a TM |
536 | state->skbs = kcalloc(state->packet_count, |
537 | sizeof(state->skbs[0]), GFP_KERNEL); | |
9b7bfc4c BH |
538 | if (!state->skbs) |
539 | return -ENOMEM; | |
dc8cfa55 | 540 | state->flush = false; |
3273c2e8 | 541 | |
62776d03 BH |
542 | netif_dbg(efx, drv, efx->net_dev, |
543 | "TX queue %d testing %s loopback with %d packets\n", | |
544 | tx_queue->queue, LOOPBACK_MODE(efx), | |
545 | state->packet_count); | |
3273c2e8 BH |
546 | |
547 | efx_iterate_state(efx); | |
b9aafb0e BH |
548 | begin_rc = efx_begin_loopback(tx_queue); |
549 | ||
550 | /* This will normally complete very quickly, but be | |
93e5dfa5 | 551 | * prepared to wait much longer. */ |
b9aafb0e BH |
552 | msleep(1); |
553 | if (!efx_poll_loopback(efx)) { | |
93e5dfa5 | 554 | msleep(LOOPBACK_TIMEOUT_MS); |
b9aafb0e | 555 | efx_poll_loopback(efx); |
3273c2e8 BH |
556 | } |
557 | ||
b9aafb0e | 558 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
559 | kfree(state->skbs); |
560 | ||
b9aafb0e | 561 | if (begin_rc || end_rc) { |
3273c2e8 BH |
562 | /* Wait a while to ensure there are no packets |
563 | * floating around after a failure. */ | |
564 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 565 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
566 | } |
567 | } | |
568 | ||
62776d03 BH |
569 | netif_dbg(efx, drv, efx->net_dev, |
570 | "TX queue %d passed %s loopback test with a burst length " | |
571 | "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), | |
572 | state->packet_count); | |
3273c2e8 | 573 | |
a0c2c190 | 574 | return 0; |
3273c2e8 BH |
575 | } |
576 | ||
78c1f0a0 SH |
577 | /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
578 | * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it | |
579 | * to delay and retry. Therefore, it's safer to just poll directly. Wait | |
580 | * for link up and any faults to dissipate. */ | |
581 | static int efx_wait_for_link(struct efx_nic *efx) | |
582 | { | |
583 | struct efx_link_state *link_state = &efx->link_state; | |
901d3fe8 | 584 | int count, link_up_count = 0; |
78c1f0a0 SH |
585 | bool link_up; |
586 | ||
587 | for (count = 0; count < 40; count++) { | |
588 | schedule_timeout_uninterruptible(HZ / 10); | |
589 | ||
590 | if (efx->type->monitor != NULL) { | |
591 | mutex_lock(&efx->mac_lock); | |
592 | efx->type->monitor(efx); | |
593 | mutex_unlock(&efx->mac_lock); | |
78c1f0a0 SH |
594 | } |
595 | ||
596 | mutex_lock(&efx->mac_lock); | |
597 | link_up = link_state->up; | |
598 | if (link_up) | |
710b208d | 599 | link_up = !efx->type->check_mac_fault(efx); |
78c1f0a0 SH |
600 | mutex_unlock(&efx->mac_lock); |
601 | ||
901d3fe8 SH |
602 | if (link_up) { |
603 | if (++link_up_count == 2) | |
604 | return 0; | |
605 | } else { | |
606 | link_up_count = 0; | |
607 | } | |
78c1f0a0 SH |
608 | } |
609 | ||
610 | return -ETIMEDOUT; | |
611 | } | |
612 | ||
a5692e49 | 613 | static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
3273c2e8 BH |
614 | unsigned int loopback_modes) |
615 | { | |
8c8661e4 BH |
616 | enum efx_loopback_mode mode; |
617 | struct efx_loopback_state *state; | |
1ac0226e BH |
618 | struct efx_channel *channel = |
619 | efx_get_channel(efx, efx->tx_channel_offset); | |
3273c2e8 | 620 | struct efx_tx_queue *tx_queue; |
78c1f0a0 | 621 | int rc = 0; |
3273c2e8 | 622 | |
8c8661e4 BH |
623 | /* Set the port loopback_selftest member. From this point on |
624 | * all received packets will be dropped. Mark the state as | |
625 | * "flushing" so all inflight packets are dropped */ | |
626 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
627 | if (state == NULL) | |
628 | return -ENOMEM; | |
629 | BUG_ON(efx->loopback_selftest); | |
630 | state->flush = true; | |
631 | efx->loopback_selftest = state; | |
3273c2e8 BH |
632 | |
633 | /* Test all supported loopback modes */ | |
8c8661e4 | 634 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
635 | if (!(loopback_modes & (1 << mode))) |
636 | continue; | |
637 | ||
638 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 639 | state->flush = true; |
78c1f0a0 | 640 | mutex_lock(&efx->mac_lock); |
3273c2e8 | 641 | efx->loopback_mode = mode; |
78c1f0a0 SH |
642 | rc = __efx_reconfigure_port(efx); |
643 | mutex_unlock(&efx->mac_lock); | |
644 | if (rc) { | |
62776d03 BH |
645 | netif_err(efx, drv, efx->net_dev, |
646 | "unable to move into %s loopback\n", | |
647 | LOOPBACK_MODE(efx)); | |
78c1f0a0 SH |
648 | goto out; |
649 | } | |
3273c2e8 | 650 | |
78c1f0a0 SH |
651 | rc = efx_wait_for_link(efx); |
652 | if (rc) { | |
62776d03 BH |
653 | netif_err(efx, drv, efx->net_dev, |
654 | "loopback %s never came up\n", | |
655 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
656 | goto out; |
657 | } | |
658 | ||
94b274bf | 659 | /* Test all enabled types of TX queue */ |
f7d12cdc | 660 | efx_for_each_channel_tx_queue(tx_queue, channel) { |
a4900ac9 BH |
661 | state->offload_csum = (tx_queue->queue & |
662 | EFX_TXQ_TYPE_OFFLOAD); | |
f8ea0b67 BH |
663 | rc = efx_test_loopback(tx_queue, |
664 | &tests->loopback[mode]); | |
3273c2e8 BH |
665 | if (rc) |
666 | goto out; | |
667 | } | |
668 | } | |
669 | ||
670 | out: | |
8c8661e4 | 671 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 672 | state->flush = true; |
8c8661e4 BH |
673 | efx->loopback_selftest = NULL; |
674 | wmb(); | |
675 | kfree(state); | |
3273c2e8 | 676 | |
27324820 DP |
677 | if (rc == -EPERM) |
678 | rc = 0; | |
679 | ||
3273c2e8 BH |
680 | return rc; |
681 | } | |
682 | ||
683 | /************************************************************************** | |
684 | * | |
2ef3068e | 685 | * Entry point |
3273c2e8 BH |
686 | * |
687 | *************************************************************************/ | |
688 | ||
2ef3068e BH |
689 | int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
690 | unsigned flags) | |
3273c2e8 | 691 | { |
2ef3068e BH |
692 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
693 | int phy_mode = efx->phy_mode; | |
d4f2cecc | 694 | int rc_test = 0, rc_reset, rc; |
2ef3068e | 695 | |
dd40781e BH |
696 | efx_selftest_async_cancel(efx); |
697 | ||
2ef3068e BH |
698 | /* Online (i.e. non-disruptive) testing |
699 | * This checks interrupt generation, event delivery and PHY presence. */ | |
8c8661e4 | 700 | |
4f16c073 | 701 | rc = efx_test_phy_alive(efx, tests); |
2ef3068e BH |
702 | if (rc && !rc_test) |
703 | rc_test = rc; | |
8c8661e4 BH |
704 | |
705 | rc = efx_test_nvram(efx, tests); | |
2ef3068e BH |
706 | if (rc && !rc_test) |
707 | rc_test = rc; | |
3273c2e8 | 708 | |
f8ea0b67 | 709 | rc = efx_test_interrupts(efx, tests); |
2ef3068e BH |
710 | if (rc && !rc_test) |
711 | rc_test = rc; | |
8c8661e4 | 712 | |
ed74f480 BH |
713 | rc = efx_test_eventq_irq(efx, tests); |
714 | if (rc && !rc_test) | |
715 | rc_test = rc; | |
8c8661e4 | 716 | |
2ef3068e BH |
717 | if (rc_test) |
718 | return rc_test; | |
3273c2e8 | 719 | |
2ef3068e | 720 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 721 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
722 | |
723 | /* Offline (i.e. disruptive) testing | |
724 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 | 725 | |
e4abce85 BH |
726 | /* Detach the device so the kernel doesn't transmit during the |
727 | * loopback test and the watchdog timeout doesn't fire. | |
8c8661e4 | 728 | */ |
c2f3b8e3 | 729 | efx_device_detach_sync(efx); |
e4abce85 | 730 | |
d4f2cecc BH |
731 | if (efx->type->test_chip) { |
732 | rc_reset = efx->type->test_chip(efx, tests); | |
733 | if (rc_reset) { | |
734 | netif_err(efx, hw, efx->net_dev, | |
735 | "Unable to recover from chip test\n"); | |
736 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
737 | return rc_reset; | |
738 | } | |
8c8661e4 | 739 | |
74cd60a4 | 740 | if ((tests->memory < 0 || tests->registers < 0) && !rc_test) |
d4f2cecc BH |
741 | rc_test = -EIO; |
742 | } | |
8c8661e4 | 743 | |
a5692e49 BH |
744 | /* Ensure that the phy is powered and out of loopback |
745 | * for the bist and loopback tests */ | |
d4f2cecc | 746 | mutex_lock(&efx->mac_lock); |
a5692e49 | 747 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; |
8c8661e4 | 748 | efx->loopback_mode = LOOPBACK_NONE; |
d4f2cecc BH |
749 | __efx_reconfigure_port(efx); |
750 | mutex_unlock(&efx->mac_lock); | |
3273c2e8 | 751 | |
1796721a | 752 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
753 | if (rc && !rc_test) |
754 | rc_test = rc; | |
3273c2e8 | 755 | |
2ef3068e BH |
756 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
757 | if (rc && !rc_test) | |
758 | rc_test = rc; | |
3273c2e8 | 759 | |
8c8661e4 | 760 | /* restore the PHY to the previous state */ |
d3245b28 | 761 | mutex_lock(&efx->mac_lock); |
8c8661e4 | 762 | efx->phy_mode = phy_mode; |
d3245b28 BH |
763 | efx->loopback_mode = loopback_mode; |
764 | __efx_reconfigure_port(efx); | |
765 | mutex_unlock(&efx->mac_lock); | |
8c8661e4 | 766 | |
9c568fd8 | 767 | efx_device_attach_if_not_resetting(efx); |
9d1aea62 | 768 | |
2ef3068e | 769 | return rc_test; |
3273c2e8 BH |
770 | } |
771 | ||
dd40781e BH |
772 | void efx_selftest_async_start(struct efx_nic *efx) |
773 | { | |
774 | struct efx_channel *channel; | |
775 | ||
776 | efx_for_each_channel(channel, efx) | |
777 | efx_nic_event_test_start(channel); | |
778 | schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT); | |
779 | } | |
780 | ||
781 | void efx_selftest_async_cancel(struct efx_nic *efx) | |
782 | { | |
783 | cancel_delayed_work_sync(&efx->selftest_work); | |
784 | } | |
785 | ||
786 | void efx_selftest_async_work(struct work_struct *data) | |
787 | { | |
788 | struct efx_nic *efx = container_of(data, struct efx_nic, | |
789 | selftest_work.work); | |
790 | struct efx_channel *channel; | |
791 | int cpu; | |
792 | ||
793 | efx_for_each_channel(channel, efx) { | |
794 | cpu = efx_nic_event_test_irq_cpu(channel); | |
795 | if (cpu < 0) | |
796 | netif_err(efx, ifup, efx->net_dev, | |
797 | "channel %d failed to trigger an interrupt\n", | |
798 | channel->channel); | |
799 | else | |
800 | netif_dbg(efx, ifup, efx->net_dev, | |
801 | "channel %d triggered interrupt on CPU %d\n", | |
802 | channel->channel, cpu); | |
803 | } | |
804 | } |