Commit | Line | Data |
---|---|---|
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" |
e1253f39 AM |
21 | #include "efx_common.h" |
22 | #include "efx_channels.h" | |
744093c9 | 23 | #include "nic.h" |
c77289b4 | 24 | #include "mcdi_port_common.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; | |
1d20a160 | 49 | char msg[64]; |
ba2d3587 | 50 | } __packed; |
3273c2e8 BH |
51 | |
52 | /* Loopback test source MAC address */ | |
cd84ff4d | 53 | static const u8 payload_source[ETH_ALEN] __aligned(2) = { |
3273c2e8 BH |
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 | /** |
b1d11fdb | 71 | * struct 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 | |
c77289b4 EC |
103 | rc = efx_mcdi_phy_test_alive(efx); |
104 | tests->phy_alive = rc ? -1 : 1; | |
8c8661e4 | 105 | |
8c8661e4 BH |
106 | return rc; |
107 | } | |
108 | ||
109 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
110 | { | |
0aa3fbaa BH |
111 | int rc = 0; |
112 | ||
113 | if (efx->type->test_nvram) { | |
114 | rc = efx->type->test_nvram(efx); | |
27324820 DP |
115 | if (rc == -EPERM) |
116 | rc = 0; | |
117 | else | |
118 | tests->nvram = rc ? -1 : 1; | |
0aa3fbaa | 119 | } |
8c8661e4 | 120 | |
8c8661e4 BH |
121 | return rc; |
122 | } | |
123 | ||
3273c2e8 BH |
124 | /************************************************************************** |
125 | * | |
126 | * Interrupt and event queue testing | |
127 | * | |
128 | **************************************************************************/ | |
129 | ||
130 | /* Test generation and receipt of interrupts */ | |
131 | static int efx_test_interrupts(struct efx_nic *efx, | |
132 | struct efx_self_tests *tests) | |
133 | { | |
93e5dfa5 | 134 | unsigned long timeout, wait; |
1646a6f3 | 135 | int cpu; |
942e298e | 136 | int rc; |
1646a6f3 | 137 | |
62776d03 | 138 | netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); |
3273c2e8 BH |
139 | tests->interrupt = -1; |
140 | ||
942e298e JC |
141 | rc = efx_nic_irq_test_start(efx); |
142 | if (rc == -ENOTSUPP) { | |
143 | netif_dbg(efx, drv, efx->net_dev, | |
144 | "direct interrupt testing not supported\n"); | |
145 | tests->interrupt = 0; | |
146 | return 0; | |
147 | } | |
148 | ||
93e5dfa5 BH |
149 | timeout = jiffies + IRQ_TIMEOUT; |
150 | wait = 1; | |
3273c2e8 BH |
151 | |
152 | /* Wait for arrival of test interrupt. */ | |
62776d03 | 153 | netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n"); |
93e5dfa5 BH |
154 | do { |
155 | schedule_timeout_uninterruptible(wait); | |
eee6f6a9 | 156 | cpu = efx_nic_irq_test_irq_cpu(efx); |
93e5dfa5 BH |
157 | if (cpu >= 0) |
158 | goto success; | |
159 | wait *= 2; | |
160 | } while (time_before(jiffies, timeout)); | |
3273c2e8 | 161 | |
62776d03 | 162 | netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); |
3273c2e8 BH |
163 | return -ETIMEDOUT; |
164 | ||
165 | success: | |
62776d03 | 166 | netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", |
1646a6f3 | 167 | INT_MODE(efx), cpu); |
3273c2e8 BH |
168 | tests->interrupt = 1; |
169 | return 0; | |
170 | } | |
171 | ||
3273c2e8 | 172 | /* Test generation and receipt of interrupting events */ |
ed74f480 | 173 | static int efx_test_eventq_irq(struct efx_nic *efx, |
3273c2e8 BH |
174 | struct efx_self_tests *tests) |
175 | { | |
ed74f480 BH |
176 | struct efx_channel *channel; |
177 | unsigned int read_ptr[EFX_MAX_CHANNELS]; | |
178 | unsigned long napi_ran = 0, dma_pend = 0, int_pend = 0; | |
93e5dfa5 | 179 | unsigned long timeout, wait; |
3273c2e8 | 180 | |
ed74f480 BH |
181 | BUILD_BUG_ON(EFX_MAX_CHANNELS > BITS_PER_LONG); |
182 | ||
183 | efx_for_each_channel(channel, efx) { | |
184 | read_ptr[channel->channel] = channel->eventq_read_ptr; | |
185 | set_bit(channel->channel, &dma_pend); | |
186 | set_bit(channel->channel, &int_pend); | |
eee6f6a9 | 187 | efx_nic_event_test_start(channel); |
ed74f480 | 188 | } |
3273c2e8 | 189 | |
93e5dfa5 BH |
190 | timeout = jiffies + IRQ_TIMEOUT; |
191 | wait = 1; | |
3273c2e8 | 192 | |
ed74f480 | 193 | /* Wait for arrival of interrupts. NAPI processing may or may |
0fb53faa BH |
194 | * not complete in time, but we can cope in any case. |
195 | */ | |
93e5dfa5 BH |
196 | do { |
197 | schedule_timeout_uninterruptible(wait); | |
198 | ||
ed74f480 | 199 | efx_for_each_channel(channel, efx) { |
36763266 | 200 | efx_stop_eventq(channel); |
ed74f480 BH |
201 | if (channel->eventq_read_ptr != |
202 | read_ptr[channel->channel]) { | |
203 | set_bit(channel->channel, &napi_ran); | |
204 | clear_bit(channel->channel, &dma_pend); | |
205 | clear_bit(channel->channel, &int_pend); | |
206 | } else { | |
207 | if (efx_nic_event_present(channel)) | |
208 | clear_bit(channel->channel, &dma_pend); | |
eee6f6a9 | 209 | if (efx_nic_event_test_irq_cpu(channel) >= 0) |
ed74f480 BH |
210 | clear_bit(channel->channel, &int_pend); |
211 | } | |
36763266 | 212 | efx_start_eventq(channel); |
93e5dfa5 | 213 | } |
93e5dfa5 BH |
214 | |
215 | wait *= 2; | |
ed74f480 | 216 | } while ((dma_pend || int_pend) && time_before(jiffies, timeout)); |
0fb53faa | 217 | |
ed74f480 BH |
218 | efx_for_each_channel(channel, efx) { |
219 | bool dma_seen = !test_bit(channel->channel, &dma_pend); | |
220 | bool int_seen = !test_bit(channel->channel, &int_pend); | |
221 | ||
222 | tests->eventq_dma[channel->channel] = dma_seen ? 1 : -1; | |
223 | tests->eventq_int[channel->channel] = int_seen ? 1 : -1; | |
224 | ||
225 | if (dma_seen && int_seen) { | |
226 | netif_dbg(efx, drv, efx->net_dev, | |
227 | "channel %d event queue passed (with%s NAPI)\n", | |
228 | channel->channel, | |
229 | test_bit(channel->channel, &napi_ran) ? | |
230 | "" : "out"); | |
231 | } else { | |
232 | /* Report failure and whether either interrupt or DMA | |
233 | * worked | |
234 | */ | |
0fb53faa | 235 | netif_err(efx, drv, efx->net_dev, |
ed74f480 | 236 | "channel %d timed out waiting for event queue\n", |
0fb53faa | 237 | channel->channel); |
ed74f480 BH |
238 | if (int_seen) |
239 | netif_err(efx, drv, efx->net_dev, | |
240 | "channel %d saw interrupt " | |
241 | "during event queue test\n", | |
242 | channel->channel); | |
243 | if (dma_seen) | |
244 | netif_err(efx, drv, efx->net_dev, | |
245 | "channel %d event was generated, but " | |
246 | "failed to trigger an interrupt\n", | |
247 | channel->channel); | |
248 | } | |
3273c2e8 | 249 | } |
ed74f480 BH |
250 | |
251 | return (dma_pend || int_pend) ? -ETIMEDOUT : 0; | |
3273c2e8 BH |
252 | } |
253 | ||
1796721a BH |
254 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
255 | unsigned flags) | |
3273c2e8 | 256 | { |
8c8661e4 | 257 | int rc; |
3273c2e8 | 258 | |
8c8661e4 | 259 | mutex_lock(&efx->mac_lock); |
c77289b4 | 260 | rc = efx_mcdi_phy_run_tests(efx, tests->phy_ext, flags); |
8c8661e4 | 261 | mutex_unlock(&efx->mac_lock); |
27324820 DP |
262 | if (rc == -EPERM) |
263 | rc = 0; | |
264 | else | |
265 | netif_info(efx, drv, efx->net_dev, | |
266 | "%s phy selftest\n", rc ? "Failed" : "Passed"); | |
267 | ||
8c8661e4 | 268 | return rc; |
3273c2e8 BH |
269 | } |
270 | ||
271 | /************************************************************************** | |
272 | * | |
273 | * Loopback testing | |
274 | * NB Only one loopback test can be executing concurrently. | |
275 | * | |
276 | **************************************************************************/ | |
277 | ||
278 | /* Loopback test RX callback | |
279 | * This is called for each received packet during loopback testing. | |
280 | */ | |
281 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
282 | const char *buf_ptr, int pkt_len) | |
283 | { | |
8c8661e4 | 284 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
285 | struct efx_loopback_payload *received; |
286 | struct efx_loopback_payload *payload; | |
287 | ||
288 | BUG_ON(!buf_ptr); | |
289 | ||
290 | /* If we are just flushing, then drop the packet */ | |
291 | if ((state == NULL) || state->flush) | |
292 | return; | |
293 | ||
294 | payload = &state->payload; | |
8c8661e4 | 295 | |
d3208b5e | 296 | received = (struct efx_loopback_payload *) buf_ptr; |
3273c2e8 | 297 | received->ip.saddr = payload->ip.saddr; |
60ac1065 BH |
298 | if (state->offload_csum) |
299 | received->ip.check = payload->ip.check; | |
300 | ||
3273c2e8 BH |
301 | /* Check that header exists */ |
302 | if (pkt_len < sizeof(received->header)) { | |
62776d03 BH |
303 | netif_err(efx, drv, efx->net_dev, |
304 | "saw runt RX packet (length %d) in %s loopback " | |
305 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
306 | goto err; |
307 | } | |
308 | ||
309 | /* Check that the ethernet header exists */ | |
310 | if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { | |
62776d03 BH |
311 | netif_err(efx, drv, efx->net_dev, |
312 | "saw non-loopback RX packet in %s loopback test\n", | |
313 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
314 | goto err; |
315 | } | |
316 | ||
317 | /* Check packet length */ | |
318 | if (pkt_len != sizeof(*payload)) { | |
62776d03 BH |
319 | netif_err(efx, drv, efx->net_dev, |
320 | "saw incorrect RX packet length %d (wanted %d) in " | |
321 | "%s loopback test\n", pkt_len, (int)sizeof(*payload), | |
322 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
323 | goto err; |
324 | } | |
325 | ||
326 | /* Check that IP header matches */ | |
327 | if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { | |
62776d03 BH |
328 | netif_err(efx, drv, efx->net_dev, |
329 | "saw corrupted IP header in %s loopback test\n", | |
330 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
331 | goto err; |
332 | } | |
333 | ||
334 | /* Check that msg and padding matches */ | |
335 | if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { | |
62776d03 BH |
336 | netif_err(efx, drv, efx->net_dev, |
337 | "saw corrupted RX packet in %s loopback test\n", | |
338 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
339 | goto err; |
340 | } | |
341 | ||
342 | /* Check that iteration matches */ | |
343 | if (received->iteration != payload->iteration) { | |
62776d03 BH |
344 | netif_err(efx, drv, efx->net_dev, |
345 | "saw RX packet from iteration %d (wanted %d) in " | |
346 | "%s loopback test\n", ntohs(received->iteration), | |
347 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
348 | goto err; |
349 | } | |
350 | ||
351 | /* Increase correct RX count */ | |
62776d03 BH |
352 | netif_vdbg(efx, drv, efx->net_dev, |
353 | "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
354 | |
355 | atomic_inc(&state->rx_good); | |
356 | return; | |
357 | ||
358 | err: | |
5f3f9d6c | 359 | #ifdef DEBUG |
3273c2e8 | 360 | if (atomic_read(&state->rx_bad) == 0) { |
62776d03 | 361 | netif_err(efx, drv, efx->net_dev, "received packet:\n"); |
3273c2e8 BH |
362 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
363 | buf_ptr, pkt_len, 0); | |
62776d03 | 364 | netif_err(efx, drv, efx->net_dev, "expected packet:\n"); |
3273c2e8 BH |
365 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
366 | &state->payload, sizeof(state->payload), 0); | |
367 | } | |
368 | #endif | |
369 | atomic_inc(&state->rx_bad); | |
370 | } | |
371 | ||
372 | /* Initialise an efx_selftest_state for a new iteration */ | |
373 | static void efx_iterate_state(struct efx_nic *efx) | |
374 | { | |
8c8661e4 | 375 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
376 | struct net_device *net_dev = efx->net_dev; |
377 | struct efx_loopback_payload *payload = &state->payload; | |
378 | ||
379 | /* Initialise the layerII header */ | |
cd84ff4d EC |
380 | ether_addr_copy((u8 *)&payload->header.h_dest, net_dev->dev_addr); |
381 | ether_addr_copy((u8 *)&payload->header.h_source, payload_source); | |
3273c2e8 BH |
382 | payload->header.h_proto = htons(ETH_P_IP); |
383 | ||
384 | /* saddr set later and used as incrementing count */ | |
385 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
386 | payload->ip.ihl = 5; | |
3f978ef3 | 387 | payload->ip.check = (__force __sum16) htons(0xdead); |
3273c2e8 BH |
388 | payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); |
389 | payload->ip.version = IPVERSION; | |
390 | payload->ip.protocol = IPPROTO_UDP; | |
391 | ||
392 | /* Initialise udp header */ | |
393 | payload->udp.source = 0; | |
394 | payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - | |
395 | sizeof(struct iphdr)); | |
396 | payload->udp.check = 0; /* checksum ignored */ | |
397 | ||
398 | /* Fill out payload */ | |
399 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
400 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
401 | ||
402 | /* Fill out remaining state members */ | |
403 | atomic_set(&state->rx_good, 0); | |
404 | atomic_set(&state->rx_bad, 0); | |
405 | smp_wmb(); | |
406 | } | |
407 | ||
b9aafb0e | 408 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
409 | { |
410 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 411 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
412 | struct efx_loopback_payload *payload; |
413 | struct sk_buff *skb; | |
61357325 SH |
414 | int i; |
415 | netdev_tx_t rc; | |
3273c2e8 BH |
416 | |
417 | /* Transmit N copies of buffer */ | |
418 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 419 | /* Allocate an skb, holding an extra reference for |
3273c2e8 BH |
420 | * transmit completion counting */ |
421 | skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); | |
422 | if (!skb) | |
423 | return -ENOMEM; | |
424 | state->skbs[i] = skb; | |
425 | skb_get(skb); | |
426 | ||
427 | /* Copy the payload in, incrementing the source address to | |
428 | * exercise the rss vectors */ | |
4df864c1 | 429 | payload = skb_put(skb, sizeof(state->payload)); |
3273c2e8 BH |
430 | memcpy(payload, &state->payload, sizeof(state->payload)); |
431 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
432 | ||
433 | /* Ensure everything we've written is visible to the | |
434 | * interrupt handler. */ | |
435 | smp_wmb(); | |
436 | ||
73ba7b68 | 437 | netif_tx_lock_bh(efx->net_dev); |
497f5ba3 | 438 | rc = efx_enqueue_skb(tx_queue, skb); |
73ba7b68 | 439 | netif_tx_unlock_bh(efx->net_dev); |
3273c2e8 BH |
440 | |
441 | if (rc != NETDEV_TX_OK) { | |
62776d03 BH |
442 | netif_err(efx, drv, efx->net_dev, |
443 | "TX queue %d could not transmit packet %d of " | |
a81dcd85 | 444 | "%d in %s loopback test\n", tx_queue->label, |
62776d03 BH |
445 | i + 1, state->packet_count, |
446 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
447 | |
448 | /* Defer cleaning up the other skbs for the caller */ | |
449 | kfree_skb(skb); | |
450 | return -EPIPE; | |
451 | } | |
452 | } | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
b9aafb0e BH |
457 | static int efx_poll_loopback(struct efx_nic *efx) |
458 | { | |
8c8661e4 | 459 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 460 | |
b9aafb0e BH |
461 | return atomic_read(&state->rx_good) == state->packet_count; |
462 | } | |
463 | ||
464 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
465 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
466 | { |
467 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 468 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
469 | struct sk_buff *skb; |
470 | int tx_done = 0, rx_good, rx_bad; | |
471 | int i, rc = 0; | |
472 | ||
73ba7b68 | 473 | netif_tx_lock_bh(efx->net_dev); |
3273c2e8 BH |
474 | |
475 | /* Count the number of tx completions, and decrement the refcnt. Any | |
476 | * skbs not already completed will be free'd when the queue is flushed */ | |
9c636baf | 477 | for (i = 0; i < state->packet_count; i++) { |
3273c2e8 BH |
478 | skb = state->skbs[i]; |
479 | if (skb && !skb_shared(skb)) | |
480 | ++tx_done; | |
e3ed2bdf | 481 | dev_kfree_skb(skb); |
3273c2e8 BH |
482 | } |
483 | ||
73ba7b68 | 484 | netif_tx_unlock_bh(efx->net_dev); |
3273c2e8 BH |
485 | |
486 | /* Check TX completion and received packet counts */ | |
487 | rx_good = atomic_read(&state->rx_good); | |
488 | rx_bad = atomic_read(&state->rx_bad); | |
489 | if (tx_done != state->packet_count) { | |
490 | /* Don't free the skbs; they will be picked up on TX | |
491 | * overflow or channel teardown. | |
492 | */ | |
62776d03 BH |
493 | netif_err(efx, drv, efx->net_dev, |
494 | "TX queue %d saw only %d out of an expected %d " | |
495 | "TX completion events in %s loopback test\n", | |
a81dcd85 | 496 | tx_queue->label, tx_done, state->packet_count, |
62776d03 | 497 | LOOPBACK_MODE(efx)); |
3273c2e8 BH |
498 | rc = -ETIMEDOUT; |
499 | /* Allow to fall through so we see the RX errors as well */ | |
500 | } | |
501 | ||
502 | /* We may always be up to a flush away from our desired packet total */ | |
503 | if (rx_good != state->packet_count) { | |
62776d03 BH |
504 | netif_dbg(efx, drv, efx->net_dev, |
505 | "TX queue %d saw only %d out of an expected %d " | |
506 | "received packets in %s loopback test\n", | |
a81dcd85 | 507 | tx_queue->label, rx_good, state->packet_count, |
62776d03 | 508 | LOOPBACK_MODE(efx)); |
3273c2e8 BH |
509 | rc = -ETIMEDOUT; |
510 | /* Fall through */ | |
511 | } | |
512 | ||
513 | /* Update loopback test structure */ | |
a81dcd85 EC |
514 | lb_tests->tx_sent[tx_queue->label] += state->packet_count; |
515 | lb_tests->tx_done[tx_queue->label] += tx_done; | |
3273c2e8 BH |
516 | lb_tests->rx_good += rx_good; |
517 | lb_tests->rx_bad += rx_bad; | |
518 | ||
519 | return rc; | |
520 | } | |
521 | ||
522 | static int | |
523 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
524 | struct efx_loopback_self_tests *lb_tests) | |
525 | { | |
526 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 527 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 528 | int i, begin_rc, end_rc; |
3273c2e8 | 529 | |
8c8661e4 | 530 | for (i = 0; i < 3; i++) { |
3273c2e8 | 531 | /* Determine how many packets to send */ |
ecc910f5 | 532 | state->packet_count = efx->txq_entries / 3; |
3273c2e8 | 533 | state->packet_count = min(1 << (i << 2), state->packet_count); |
c2e4e25a TM |
534 | state->skbs = kcalloc(state->packet_count, |
535 | sizeof(state->skbs[0]), GFP_KERNEL); | |
9b7bfc4c BH |
536 | if (!state->skbs) |
537 | return -ENOMEM; | |
dc8cfa55 | 538 | state->flush = false; |
3273c2e8 | 539 | |
62776d03 | 540 | netif_dbg(efx, drv, efx->net_dev, |
a81dcd85 EC |
541 | "TX queue %d (hw %d) testing %s loopback with %d packets\n", |
542 | tx_queue->label, tx_queue->queue, LOOPBACK_MODE(efx), | |
62776d03 | 543 | state->packet_count); |
3273c2e8 BH |
544 | |
545 | efx_iterate_state(efx); | |
b9aafb0e BH |
546 | begin_rc = efx_begin_loopback(tx_queue); |
547 | ||
548 | /* This will normally complete very quickly, but be | |
93e5dfa5 | 549 | * prepared to wait much longer. */ |
b9aafb0e BH |
550 | msleep(1); |
551 | if (!efx_poll_loopback(efx)) { | |
93e5dfa5 | 552 | msleep(LOOPBACK_TIMEOUT_MS); |
b9aafb0e | 553 | efx_poll_loopback(efx); |
3273c2e8 BH |
554 | } |
555 | ||
b9aafb0e | 556 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
557 | kfree(state->skbs); |
558 | ||
b9aafb0e | 559 | if (begin_rc || end_rc) { |
3273c2e8 BH |
560 | /* Wait a while to ensure there are no packets |
561 | * floating around after a failure. */ | |
562 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 563 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
564 | } |
565 | } | |
566 | ||
62776d03 BH |
567 | netif_dbg(efx, drv, efx->net_dev, |
568 | "TX queue %d passed %s loopback test with a burst length " | |
a81dcd85 | 569 | "of %d packets\n", tx_queue->label, LOOPBACK_MODE(efx), |
62776d03 | 570 | state->packet_count); |
3273c2e8 | 571 | |
a0c2c190 | 572 | return 0; |
3273c2e8 BH |
573 | } |
574 | ||
78c1f0a0 SH |
575 | /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
576 | * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it | |
577 | * to delay and retry. Therefore, it's safer to just poll directly. Wait | |
578 | * for link up and any faults to dissipate. */ | |
579 | static int efx_wait_for_link(struct efx_nic *efx) | |
580 | { | |
581 | struct efx_link_state *link_state = &efx->link_state; | |
901d3fe8 | 582 | int count, link_up_count = 0; |
78c1f0a0 SH |
583 | bool link_up; |
584 | ||
585 | for (count = 0; count < 40; count++) { | |
586 | schedule_timeout_uninterruptible(HZ / 10); | |
587 | ||
588 | if (efx->type->monitor != NULL) { | |
589 | mutex_lock(&efx->mac_lock); | |
590 | efx->type->monitor(efx); | |
591 | mutex_unlock(&efx->mac_lock); | |
78c1f0a0 SH |
592 | } |
593 | ||
594 | mutex_lock(&efx->mac_lock); | |
595 | link_up = link_state->up; | |
596 | if (link_up) | |
710b208d | 597 | link_up = !efx->type->check_mac_fault(efx); |
78c1f0a0 SH |
598 | mutex_unlock(&efx->mac_lock); |
599 | ||
901d3fe8 SH |
600 | if (link_up) { |
601 | if (++link_up_count == 2) | |
602 | return 0; | |
603 | } else { | |
604 | link_up_count = 0; | |
605 | } | |
78c1f0a0 SH |
606 | } |
607 | ||
608 | return -ETIMEDOUT; | |
609 | } | |
610 | ||
a5692e49 | 611 | static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
3273c2e8 BH |
612 | unsigned int loopback_modes) |
613 | { | |
8c8661e4 BH |
614 | enum efx_loopback_mode mode; |
615 | struct efx_loopback_state *state; | |
1ac0226e BH |
616 | struct efx_channel *channel = |
617 | efx_get_channel(efx, efx->tx_channel_offset); | |
3273c2e8 | 618 | struct efx_tx_queue *tx_queue; |
78c1f0a0 | 619 | int rc = 0; |
3273c2e8 | 620 | |
8c8661e4 BH |
621 | /* Set the port loopback_selftest member. From this point on |
622 | * all received packets will be dropped. Mark the state as | |
623 | * "flushing" so all inflight packets are dropped */ | |
624 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
625 | if (state == NULL) | |
626 | return -ENOMEM; | |
627 | BUG_ON(efx->loopback_selftest); | |
628 | state->flush = true; | |
629 | efx->loopback_selftest = state; | |
3273c2e8 BH |
630 | |
631 | /* Test all supported loopback modes */ | |
8c8661e4 | 632 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
633 | if (!(loopback_modes & (1 << mode))) |
634 | continue; | |
635 | ||
636 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 637 | state->flush = true; |
78c1f0a0 | 638 | mutex_lock(&efx->mac_lock); |
3273c2e8 | 639 | efx->loopback_mode = mode; |
78c1f0a0 SH |
640 | rc = __efx_reconfigure_port(efx); |
641 | mutex_unlock(&efx->mac_lock); | |
642 | if (rc) { | |
62776d03 BH |
643 | netif_err(efx, drv, efx->net_dev, |
644 | "unable to move into %s loopback\n", | |
645 | LOOPBACK_MODE(efx)); | |
78c1f0a0 SH |
646 | goto out; |
647 | } | |
3273c2e8 | 648 | |
78c1f0a0 SH |
649 | rc = efx_wait_for_link(efx); |
650 | if (rc) { | |
62776d03 BH |
651 | netif_err(efx, drv, efx->net_dev, |
652 | "loopback %s never came up\n", | |
653 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
654 | goto out; |
655 | } | |
656 | ||
94b274bf | 657 | /* Test all enabled types of TX queue */ |
f7d12cdc | 658 | efx_for_each_channel_tx_queue(tx_queue, channel) { |
12804793 | 659 | state->offload_csum = (tx_queue->type & |
044588b9 | 660 | EFX_TXQ_TYPE_OUTER_CSUM); |
f8ea0b67 BH |
661 | rc = efx_test_loopback(tx_queue, |
662 | &tests->loopback[mode]); | |
3273c2e8 BH |
663 | if (rc) |
664 | goto out; | |
665 | } | |
666 | } | |
667 | ||
668 | out: | |
8c8661e4 | 669 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 670 | state->flush = true; |
8c8661e4 BH |
671 | efx->loopback_selftest = NULL; |
672 | wmb(); | |
673 | kfree(state); | |
3273c2e8 | 674 | |
27324820 DP |
675 | if (rc == -EPERM) |
676 | rc = 0; | |
677 | ||
3273c2e8 BH |
678 | return rc; |
679 | } | |
680 | ||
681 | /************************************************************************** | |
682 | * | |
2ef3068e | 683 | * Entry point |
3273c2e8 BH |
684 | * |
685 | *************************************************************************/ | |
686 | ||
2ef3068e BH |
687 | int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
688 | unsigned flags) | |
3273c2e8 | 689 | { |
2ef3068e BH |
690 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
691 | int phy_mode = efx->phy_mode; | |
d4f2cecc | 692 | int rc_test = 0, rc_reset, rc; |
2ef3068e | 693 | |
dd40781e BH |
694 | efx_selftest_async_cancel(efx); |
695 | ||
2ef3068e BH |
696 | /* Online (i.e. non-disruptive) testing |
697 | * This checks interrupt generation, event delivery and PHY presence. */ | |
8c8661e4 | 698 | |
4f16c073 | 699 | rc = efx_test_phy_alive(efx, tests); |
2ef3068e BH |
700 | if (rc && !rc_test) |
701 | rc_test = rc; | |
8c8661e4 BH |
702 | |
703 | rc = efx_test_nvram(efx, tests); | |
2ef3068e BH |
704 | if (rc && !rc_test) |
705 | rc_test = rc; | |
3273c2e8 | 706 | |
f8ea0b67 | 707 | rc = efx_test_interrupts(efx, tests); |
2ef3068e BH |
708 | if (rc && !rc_test) |
709 | rc_test = rc; | |
8c8661e4 | 710 | |
ed74f480 BH |
711 | rc = efx_test_eventq_irq(efx, tests); |
712 | if (rc && !rc_test) | |
713 | rc_test = rc; | |
8c8661e4 | 714 | |
2ef3068e BH |
715 | if (rc_test) |
716 | return rc_test; | |
3273c2e8 | 717 | |
2ef3068e | 718 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 719 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
720 | |
721 | /* Offline (i.e. disruptive) testing | |
722 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 | 723 | |
e4abce85 BH |
724 | /* Detach the device so the kernel doesn't transmit during the |
725 | * loopback test and the watchdog timeout doesn't fire. | |
8c8661e4 | 726 | */ |
c2f3b8e3 | 727 | efx_device_detach_sync(efx); |
e4abce85 | 728 | |
d4f2cecc BH |
729 | if (efx->type->test_chip) { |
730 | rc_reset = efx->type->test_chip(efx, tests); | |
731 | if (rc_reset) { | |
732 | netif_err(efx, hw, efx->net_dev, | |
733 | "Unable to recover from chip test\n"); | |
734 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
735 | return rc_reset; | |
736 | } | |
8c8661e4 | 737 | |
74cd60a4 | 738 | if ((tests->memory < 0 || tests->registers < 0) && !rc_test) |
d4f2cecc BH |
739 | rc_test = -EIO; |
740 | } | |
8c8661e4 | 741 | |
a5692e49 BH |
742 | /* Ensure that the phy is powered and out of loopback |
743 | * for the bist and loopback tests */ | |
d4f2cecc | 744 | mutex_lock(&efx->mac_lock); |
a5692e49 | 745 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; |
8c8661e4 | 746 | efx->loopback_mode = LOOPBACK_NONE; |
d4f2cecc BH |
747 | __efx_reconfigure_port(efx); |
748 | mutex_unlock(&efx->mac_lock); | |
3273c2e8 | 749 | |
1796721a | 750 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
751 | if (rc && !rc_test) |
752 | rc_test = rc; | |
3273c2e8 | 753 | |
2ef3068e BH |
754 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
755 | if (rc && !rc_test) | |
756 | rc_test = rc; | |
3273c2e8 | 757 | |
8c8661e4 | 758 | /* restore the PHY to the previous state */ |
d3245b28 | 759 | mutex_lock(&efx->mac_lock); |
8c8661e4 | 760 | efx->phy_mode = phy_mode; |
d3245b28 BH |
761 | efx->loopback_mode = loopback_mode; |
762 | __efx_reconfigure_port(efx); | |
763 | mutex_unlock(&efx->mac_lock); | |
8c8661e4 | 764 | |
9c568fd8 | 765 | efx_device_attach_if_not_resetting(efx); |
9d1aea62 | 766 | |
2ef3068e | 767 | return rc_test; |
3273c2e8 BH |
768 | } |
769 | ||
dd40781e BH |
770 | void efx_selftest_async_start(struct efx_nic *efx) |
771 | { | |
772 | struct efx_channel *channel; | |
773 | ||
774 | efx_for_each_channel(channel, efx) | |
775 | efx_nic_event_test_start(channel); | |
776 | schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT); | |
777 | } | |
778 | ||
779 | void efx_selftest_async_cancel(struct efx_nic *efx) | |
780 | { | |
781 | cancel_delayed_work_sync(&efx->selftest_work); | |
782 | } | |
783 | ||
86de7ced | 784 | static void efx_selftest_async_work(struct work_struct *data) |
dd40781e BH |
785 | { |
786 | struct efx_nic *efx = container_of(data, struct efx_nic, | |
787 | selftest_work.work); | |
788 | struct efx_channel *channel; | |
789 | int cpu; | |
790 | ||
791 | efx_for_each_channel(channel, efx) { | |
792 | cpu = efx_nic_event_test_irq_cpu(channel); | |
793 | if (cpu < 0) | |
794 | netif_err(efx, ifup, efx->net_dev, | |
795 | "channel %d failed to trigger an interrupt\n", | |
796 | channel->channel); | |
797 | else | |
798 | netif_dbg(efx, ifup, efx->net_dev, | |
799 | "channel %d triggered interrupt on CPU %d\n", | |
800 | channel->channel, cpu); | |
801 | } | |
802 | } | |
86de7ced AM |
803 | |
804 | void efx_selftest_async_init(struct efx_nic *efx) | |
805 | { | |
806 | INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); | |
807 | } |