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" |
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 { | |
cf60ed46 | 45 | char pad[2]; /* Ensures ip is 4-byte aligned */ |
3273c2e8 BH |
46 | struct ethhdr header; |
47 | struct iphdr ip; | |
48 | struct udphdr udp; | |
49 | __be16 iteration; | |
1d20a160 | 50 | char msg[64]; |
cf60ed46 EC |
51 | } __packed __aligned(4); |
52 | #define EFX_LOOPBACK_PAYLOAD_LEN (sizeof(struct efx_loopback_payload) - \ | |
53 | offsetof(struct efx_loopback_payload, \ | |
54 | header)) | |
3273c2e8 BH |
55 | |
56 | /* Loopback test source MAC address */ | |
cd84ff4d | 57 | static const u8 payload_source[ETH_ALEN] __aligned(2) = { |
3273c2e8 BH |
58 | 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b, |
59 | }; | |
60 | ||
94de803d | 61 | static const char payload_msg[] = |
3273c2e8 BH |
62 | "Hello world! This is an Efx loopback test in progress!"; |
63 | ||
d215697f | 64 | /* Interrupt mode names */ |
65 | static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; | |
18e83e4c | 66 | static const char *const efx_interrupt_mode_names[] = { |
d215697f | 67 | [EFX_INT_MODE_MSIX] = "MSI-X", |
68 | [EFX_INT_MODE_MSI] = "MSI", | |
69 | [EFX_INT_MODE_LEGACY] = "legacy", | |
70 | }; | |
71 | #define INT_MODE(efx) \ | |
72 | STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode) | |
73 | ||
3273c2e8 | 74 | /** |
b1d11fdb | 75 | * struct efx_loopback_state - persistent state during a loopback selftest |
3273c2e8 BH |
76 | * @flush: Drop all packets in efx_loopback_rx_packet |
77 | * @packet_count: Number of packets being used in this test | |
78 | * @skbs: An array of skbs transmitted | |
f30eb23e | 79 | * @offload_csum: Checksums are being offloaded |
3273c2e8 BH |
80 | * @rx_good: RX good packet count |
81 | * @rx_bad: RX bad packet count | |
82 | * @payload: Payload used in tests | |
83 | */ | |
8c8661e4 | 84 | struct efx_loopback_state { |
dc8cfa55 | 85 | bool flush; |
3273c2e8 BH |
86 | int packet_count; |
87 | struct sk_buff **skbs; | |
dc8cfa55 | 88 | bool offload_csum; |
3273c2e8 BH |
89 | atomic_t rx_good; |
90 | atomic_t rx_bad; | |
91 | struct efx_loopback_payload payload; | |
92 | }; | |
93 | ||
93e5dfa5 BH |
94 | /* How long to wait for all the packets to arrive (in ms) */ |
95 | #define LOOPBACK_TIMEOUT_MS 1000 | |
96 | ||
3273c2e8 BH |
97 | /************************************************************************** |
98 | * | |
8c8661e4 | 99 | * MII, NVRAM and register tests |
3273c2e8 BH |
100 | * |
101 | **************************************************************************/ | |
102 | ||
4f16c073 | 103 | static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests) |
8c8661e4 BH |
104 | { |
105 | int rc = 0; | |
8c8661e4 | 106 | |
c77289b4 EC |
107 | rc = efx_mcdi_phy_test_alive(efx); |
108 | tests->phy_alive = rc ? -1 : 1; | |
8c8661e4 | 109 | |
8c8661e4 BH |
110 | return rc; |
111 | } | |
112 | ||
113 | static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) | |
114 | { | |
0aa3fbaa BH |
115 | int rc = 0; |
116 | ||
117 | if (efx->type->test_nvram) { | |
118 | rc = efx->type->test_nvram(efx); | |
27324820 DP |
119 | if (rc == -EPERM) |
120 | rc = 0; | |
121 | else | |
122 | tests->nvram = rc ? -1 : 1; | |
0aa3fbaa | 123 | } |
8c8661e4 | 124 | |
8c8661e4 BH |
125 | return rc; |
126 | } | |
127 | ||
3273c2e8 BH |
128 | /************************************************************************** |
129 | * | |
130 | * Interrupt and event queue testing | |
131 | * | |
132 | **************************************************************************/ | |
133 | ||
134 | /* Test generation and receipt of interrupts */ | |
135 | static int efx_test_interrupts(struct efx_nic *efx, | |
136 | struct efx_self_tests *tests) | |
137 | { | |
93e5dfa5 | 138 | unsigned long timeout, wait; |
1646a6f3 | 139 | int cpu; |
942e298e | 140 | int rc; |
1646a6f3 | 141 | |
62776d03 | 142 | netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); |
3273c2e8 BH |
143 | tests->interrupt = -1; |
144 | ||
942e298e JC |
145 | rc = efx_nic_irq_test_start(efx); |
146 | if (rc == -ENOTSUPP) { | |
147 | netif_dbg(efx, drv, efx->net_dev, | |
148 | "direct interrupt testing not supported\n"); | |
149 | tests->interrupt = 0; | |
150 | return 0; | |
151 | } | |
152 | ||
93e5dfa5 BH |
153 | timeout = jiffies + IRQ_TIMEOUT; |
154 | wait = 1; | |
3273c2e8 BH |
155 | |
156 | /* Wait for arrival of test interrupt. */ | |
62776d03 | 157 | netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n"); |
93e5dfa5 BH |
158 | do { |
159 | schedule_timeout_uninterruptible(wait); | |
eee6f6a9 | 160 | cpu = efx_nic_irq_test_irq_cpu(efx); |
93e5dfa5 BH |
161 | if (cpu >= 0) |
162 | goto success; | |
163 | wait *= 2; | |
164 | } while (time_before(jiffies, timeout)); | |
3273c2e8 | 165 | |
62776d03 | 166 | netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); |
3273c2e8 BH |
167 | return -ETIMEDOUT; |
168 | ||
169 | success: | |
62776d03 | 170 | netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", |
1646a6f3 | 171 | INT_MODE(efx), cpu); |
3273c2e8 BH |
172 | tests->interrupt = 1; |
173 | return 0; | |
174 | } | |
175 | ||
3273c2e8 | 176 | /* Test generation and receipt of interrupting events */ |
ed74f480 | 177 | static int efx_test_eventq_irq(struct efx_nic *efx, |
3273c2e8 BH |
178 | struct efx_self_tests *tests) |
179 | { | |
ed74f480 BH |
180 | struct efx_channel *channel; |
181 | unsigned int read_ptr[EFX_MAX_CHANNELS]; | |
182 | unsigned long napi_ran = 0, dma_pend = 0, int_pend = 0; | |
93e5dfa5 | 183 | unsigned long timeout, wait; |
3273c2e8 | 184 | |
ed74f480 BH |
185 | BUILD_BUG_ON(EFX_MAX_CHANNELS > BITS_PER_LONG); |
186 | ||
187 | efx_for_each_channel(channel, efx) { | |
188 | read_ptr[channel->channel] = channel->eventq_read_ptr; | |
189 | set_bit(channel->channel, &dma_pend); | |
190 | set_bit(channel->channel, &int_pend); | |
eee6f6a9 | 191 | efx_nic_event_test_start(channel); |
ed74f480 | 192 | } |
3273c2e8 | 193 | |
93e5dfa5 BH |
194 | timeout = jiffies + IRQ_TIMEOUT; |
195 | wait = 1; | |
3273c2e8 | 196 | |
ed74f480 | 197 | /* Wait for arrival of interrupts. NAPI processing may or may |
0fb53faa BH |
198 | * not complete in time, but we can cope in any case. |
199 | */ | |
93e5dfa5 BH |
200 | do { |
201 | schedule_timeout_uninterruptible(wait); | |
202 | ||
ed74f480 | 203 | efx_for_each_channel(channel, efx) { |
36763266 | 204 | efx_stop_eventq(channel); |
ed74f480 BH |
205 | if (channel->eventq_read_ptr != |
206 | read_ptr[channel->channel]) { | |
207 | set_bit(channel->channel, &napi_ran); | |
208 | clear_bit(channel->channel, &dma_pend); | |
209 | clear_bit(channel->channel, &int_pend); | |
210 | } else { | |
211 | if (efx_nic_event_present(channel)) | |
212 | clear_bit(channel->channel, &dma_pend); | |
eee6f6a9 | 213 | if (efx_nic_event_test_irq_cpu(channel) >= 0) |
ed74f480 BH |
214 | clear_bit(channel->channel, &int_pend); |
215 | } | |
36763266 | 216 | efx_start_eventq(channel); |
93e5dfa5 | 217 | } |
93e5dfa5 BH |
218 | |
219 | wait *= 2; | |
ed74f480 | 220 | } while ((dma_pend || int_pend) && time_before(jiffies, timeout)); |
0fb53faa | 221 | |
ed74f480 BH |
222 | efx_for_each_channel(channel, efx) { |
223 | bool dma_seen = !test_bit(channel->channel, &dma_pend); | |
224 | bool int_seen = !test_bit(channel->channel, &int_pend); | |
225 | ||
226 | tests->eventq_dma[channel->channel] = dma_seen ? 1 : -1; | |
227 | tests->eventq_int[channel->channel] = int_seen ? 1 : -1; | |
228 | ||
229 | if (dma_seen && int_seen) { | |
230 | netif_dbg(efx, drv, efx->net_dev, | |
231 | "channel %d event queue passed (with%s NAPI)\n", | |
232 | channel->channel, | |
233 | test_bit(channel->channel, &napi_ran) ? | |
234 | "" : "out"); | |
235 | } else { | |
236 | /* Report failure and whether either interrupt or DMA | |
237 | * worked | |
238 | */ | |
0fb53faa | 239 | netif_err(efx, drv, efx->net_dev, |
ed74f480 | 240 | "channel %d timed out waiting for event queue\n", |
0fb53faa | 241 | channel->channel); |
ed74f480 BH |
242 | if (int_seen) |
243 | netif_err(efx, drv, efx->net_dev, | |
244 | "channel %d saw interrupt " | |
245 | "during event queue test\n", | |
246 | channel->channel); | |
247 | if (dma_seen) | |
248 | netif_err(efx, drv, efx->net_dev, | |
249 | "channel %d event was generated, but " | |
250 | "failed to trigger an interrupt\n", | |
251 | channel->channel); | |
252 | } | |
3273c2e8 | 253 | } |
ed74f480 BH |
254 | |
255 | return (dma_pend || int_pend) ? -ETIMEDOUT : 0; | |
3273c2e8 BH |
256 | } |
257 | ||
1796721a BH |
258 | static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
259 | unsigned flags) | |
3273c2e8 | 260 | { |
8c8661e4 | 261 | int rc; |
3273c2e8 | 262 | |
8c8661e4 | 263 | mutex_lock(&efx->mac_lock); |
c77289b4 | 264 | rc = efx_mcdi_phy_run_tests(efx, tests->phy_ext, flags); |
8c8661e4 | 265 | mutex_unlock(&efx->mac_lock); |
27324820 DP |
266 | if (rc == -EPERM) |
267 | rc = 0; | |
268 | else | |
269 | netif_info(efx, drv, efx->net_dev, | |
270 | "%s phy selftest\n", rc ? "Failed" : "Passed"); | |
271 | ||
8c8661e4 | 272 | return rc; |
3273c2e8 BH |
273 | } |
274 | ||
275 | /************************************************************************** | |
276 | * | |
277 | * Loopback testing | |
278 | * NB Only one loopback test can be executing concurrently. | |
279 | * | |
280 | **************************************************************************/ | |
281 | ||
282 | /* Loopback test RX callback | |
283 | * This is called for each received packet during loopback testing. | |
284 | */ | |
285 | void efx_loopback_rx_packet(struct efx_nic *efx, | |
286 | const char *buf_ptr, int pkt_len) | |
287 | { | |
8c8661e4 | 288 | struct efx_loopback_state *state = efx->loopback_selftest; |
cf60ed46 | 289 | struct efx_loopback_payload received; |
3273c2e8 BH |
290 | struct efx_loopback_payload *payload; |
291 | ||
292 | BUG_ON(!buf_ptr); | |
293 | ||
294 | /* If we are just flushing, then drop the packet */ | |
295 | if ((state == NULL) || state->flush) | |
296 | return; | |
297 | ||
298 | payload = &state->payload; | |
8c8661e4 | 299 | |
cf60ed46 EC |
300 | memcpy(&received.header, buf_ptr, |
301 | min_t(int, pkt_len, EFX_LOOPBACK_PAYLOAD_LEN)); | |
302 | received.ip.saddr = payload->ip.saddr; | |
60ac1065 | 303 | if (state->offload_csum) |
cf60ed46 | 304 | received.ip.check = payload->ip.check; |
60ac1065 | 305 | |
3273c2e8 | 306 | /* Check that header exists */ |
cf60ed46 | 307 | if (pkt_len < sizeof(received.header)) { |
62776d03 BH |
308 | netif_err(efx, drv, efx->net_dev, |
309 | "saw runt RX packet (length %d) in %s loopback " | |
310 | "test\n", pkt_len, LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
311 | goto err; |
312 | } | |
313 | ||
314 | /* Check that the ethernet header exists */ | |
cf60ed46 | 315 | if (memcmp(&received.header, &payload->header, ETH_HLEN) != 0) { |
62776d03 BH |
316 | netif_err(efx, drv, efx->net_dev, |
317 | "saw non-loopback RX packet in %s loopback test\n", | |
318 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
319 | goto err; |
320 | } | |
321 | ||
322 | /* Check packet length */ | |
cf60ed46 | 323 | if (pkt_len != EFX_LOOPBACK_PAYLOAD_LEN) { |
62776d03 BH |
324 | netif_err(efx, drv, efx->net_dev, |
325 | "saw incorrect RX packet length %d (wanted %d) in " | |
cf60ed46 EC |
326 | "%s loopback test\n", pkt_len, |
327 | (int)EFX_LOOPBACK_PAYLOAD_LEN, LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
328 | goto err; |
329 | } | |
330 | ||
331 | /* Check that IP header matches */ | |
cf60ed46 | 332 | if (memcmp(&received.ip, &payload->ip, sizeof(payload->ip)) != 0) { |
62776d03 BH |
333 | netif_err(efx, drv, efx->net_dev, |
334 | "saw corrupted IP header in %s loopback test\n", | |
335 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
336 | goto err; |
337 | } | |
338 | ||
339 | /* Check that msg and padding matches */ | |
cf60ed46 | 340 | if (memcmp(&received.msg, &payload->msg, sizeof(received.msg)) != 0) { |
62776d03 BH |
341 | netif_err(efx, drv, efx->net_dev, |
342 | "saw corrupted RX packet in %s loopback test\n", | |
343 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
344 | goto err; |
345 | } | |
346 | ||
347 | /* Check that iteration matches */ | |
cf60ed46 | 348 | if (received.iteration != payload->iteration) { |
62776d03 BH |
349 | netif_err(efx, drv, efx->net_dev, |
350 | "saw RX packet from iteration %d (wanted %d) in " | |
cf60ed46 | 351 | "%s loopback test\n", ntohs(received.iteration), |
62776d03 | 352 | ntohs(payload->iteration), LOOPBACK_MODE(efx)); |
3273c2e8 BH |
353 | goto err; |
354 | } | |
355 | ||
356 | /* Increase correct RX count */ | |
62776d03 BH |
357 | netif_vdbg(efx, drv, efx->net_dev, |
358 | "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
359 | |
360 | atomic_inc(&state->rx_good); | |
361 | return; | |
362 | ||
363 | err: | |
5f3f9d6c | 364 | #ifdef DEBUG |
3273c2e8 | 365 | if (atomic_read(&state->rx_bad) == 0) { |
62776d03 | 366 | netif_err(efx, drv, efx->net_dev, "received packet:\n"); |
3273c2e8 BH |
367 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
368 | buf_ptr, pkt_len, 0); | |
62776d03 | 369 | netif_err(efx, drv, efx->net_dev, "expected packet:\n"); |
3273c2e8 | 370 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
cf60ed46 EC |
371 | &state->payload.header, EFX_LOOPBACK_PAYLOAD_LEN, |
372 | 0); | |
3273c2e8 BH |
373 | } |
374 | #endif | |
375 | atomic_inc(&state->rx_bad); | |
376 | } | |
377 | ||
378 | /* Initialise an efx_selftest_state for a new iteration */ | |
379 | static void efx_iterate_state(struct efx_nic *efx) | |
380 | { | |
8c8661e4 | 381 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
382 | struct net_device *net_dev = efx->net_dev; |
383 | struct efx_loopback_payload *payload = &state->payload; | |
384 | ||
385 | /* Initialise the layerII header */ | |
cd84ff4d EC |
386 | ether_addr_copy((u8 *)&payload->header.h_dest, net_dev->dev_addr); |
387 | ether_addr_copy((u8 *)&payload->header.h_source, payload_source); | |
3273c2e8 BH |
388 | payload->header.h_proto = htons(ETH_P_IP); |
389 | ||
390 | /* saddr set later and used as incrementing count */ | |
391 | payload->ip.daddr = htonl(INADDR_LOOPBACK); | |
392 | payload->ip.ihl = 5; | |
3f978ef3 | 393 | payload->ip.check = (__force __sum16) htons(0xdead); |
cf60ed46 EC |
394 | payload->ip.tot_len = htons(sizeof(*payload) - |
395 | offsetof(struct efx_loopback_payload, ip)); | |
3273c2e8 BH |
396 | payload->ip.version = IPVERSION; |
397 | payload->ip.protocol = IPPROTO_UDP; | |
398 | ||
399 | /* Initialise udp header */ | |
400 | payload->udp.source = 0; | |
cf60ed46 EC |
401 | payload->udp.len = htons(sizeof(*payload) - |
402 | offsetof(struct efx_loopback_payload, udp)); | |
3273c2e8 BH |
403 | payload->udp.check = 0; /* checksum ignored */ |
404 | ||
405 | /* Fill out payload */ | |
406 | payload->iteration = htons(ntohs(payload->iteration) + 1); | |
407 | memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); | |
408 | ||
409 | /* Fill out remaining state members */ | |
410 | atomic_set(&state->rx_good, 0); | |
411 | atomic_set(&state->rx_bad, 0); | |
412 | smp_wmb(); | |
413 | } | |
414 | ||
b9aafb0e | 415 | static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
3273c2e8 BH |
416 | { |
417 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 418 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
419 | struct efx_loopback_payload *payload; |
420 | struct sk_buff *skb; | |
61357325 SH |
421 | int i; |
422 | netdev_tx_t rc; | |
3273c2e8 BH |
423 | |
424 | /* Transmit N copies of buffer */ | |
425 | for (i = 0; i < state->packet_count; i++) { | |
8c8661e4 | 426 | /* Allocate an skb, holding an extra reference for |
3273c2e8 | 427 | * transmit completion counting */ |
cf60ed46 | 428 | skb = alloc_skb(EFX_LOOPBACK_PAYLOAD_LEN, GFP_KERNEL); |
3273c2e8 BH |
429 | if (!skb) |
430 | return -ENOMEM; | |
431 | state->skbs[i] = skb; | |
432 | skb_get(skb); | |
433 | ||
434 | /* Copy the payload in, incrementing the source address to | |
435 | * exercise the rss vectors */ | |
4df864c1 | 436 | payload = skb_put(skb, sizeof(state->payload)); |
3273c2e8 BH |
437 | memcpy(payload, &state->payload, sizeof(state->payload)); |
438 | payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); | |
cf60ed46 EC |
439 | /* Strip off the leading padding */ |
440 | skb_pull(skb, offsetof(struct efx_loopback_payload, header)); | |
3273c2e8 BH |
441 | |
442 | /* Ensure everything we've written is visible to the | |
443 | * interrupt handler. */ | |
444 | smp_wmb(); | |
445 | ||
73ba7b68 | 446 | netif_tx_lock_bh(efx->net_dev); |
497f5ba3 | 447 | rc = efx_enqueue_skb(tx_queue, skb); |
73ba7b68 | 448 | netif_tx_unlock_bh(efx->net_dev); |
3273c2e8 BH |
449 | |
450 | if (rc != NETDEV_TX_OK) { | |
62776d03 BH |
451 | netif_err(efx, drv, efx->net_dev, |
452 | "TX queue %d could not transmit packet %d of " | |
a81dcd85 | 453 | "%d in %s loopback test\n", tx_queue->label, |
62776d03 BH |
454 | i + 1, state->packet_count, |
455 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
456 | |
457 | /* Defer cleaning up the other skbs for the caller */ | |
458 | kfree_skb(skb); | |
459 | return -EPIPE; | |
460 | } | |
461 | } | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
b9aafb0e BH |
466 | static int efx_poll_loopback(struct efx_nic *efx) |
467 | { | |
8c8661e4 | 468 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 469 | |
b9aafb0e BH |
470 | return atomic_read(&state->rx_good) == state->packet_count; |
471 | } | |
472 | ||
473 | static int efx_end_loopback(struct efx_tx_queue *tx_queue, | |
474 | struct efx_loopback_self_tests *lb_tests) | |
3273c2e8 BH |
475 | { |
476 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 477 | struct efx_loopback_state *state = efx->loopback_selftest; |
3273c2e8 BH |
478 | struct sk_buff *skb; |
479 | int tx_done = 0, rx_good, rx_bad; | |
480 | int i, rc = 0; | |
481 | ||
73ba7b68 | 482 | netif_tx_lock_bh(efx->net_dev); |
3273c2e8 BH |
483 | |
484 | /* Count the number of tx completions, and decrement the refcnt. Any | |
485 | * skbs not already completed will be free'd when the queue is flushed */ | |
9c636baf | 486 | for (i = 0; i < state->packet_count; i++) { |
3273c2e8 BH |
487 | skb = state->skbs[i]; |
488 | if (skb && !skb_shared(skb)) | |
489 | ++tx_done; | |
e3ed2bdf | 490 | dev_kfree_skb(skb); |
3273c2e8 BH |
491 | } |
492 | ||
73ba7b68 | 493 | netif_tx_unlock_bh(efx->net_dev); |
3273c2e8 BH |
494 | |
495 | /* Check TX completion and received packet counts */ | |
496 | rx_good = atomic_read(&state->rx_good); | |
497 | rx_bad = atomic_read(&state->rx_bad); | |
498 | if (tx_done != state->packet_count) { | |
499 | /* Don't free the skbs; they will be picked up on TX | |
500 | * overflow or channel teardown. | |
501 | */ | |
62776d03 BH |
502 | netif_err(efx, drv, efx->net_dev, |
503 | "TX queue %d saw only %d out of an expected %d " | |
504 | "TX completion events in %s loopback test\n", | |
a81dcd85 | 505 | tx_queue->label, tx_done, state->packet_count, |
62776d03 | 506 | LOOPBACK_MODE(efx)); |
3273c2e8 BH |
507 | rc = -ETIMEDOUT; |
508 | /* Allow to fall through so we see the RX errors as well */ | |
509 | } | |
510 | ||
511 | /* We may always be up to a flush away from our desired packet total */ | |
512 | if (rx_good != state->packet_count) { | |
62776d03 BH |
513 | netif_dbg(efx, drv, efx->net_dev, |
514 | "TX queue %d saw only %d out of an expected %d " | |
515 | "received packets in %s loopback test\n", | |
a81dcd85 | 516 | tx_queue->label, rx_good, state->packet_count, |
62776d03 | 517 | LOOPBACK_MODE(efx)); |
3273c2e8 BH |
518 | rc = -ETIMEDOUT; |
519 | /* Fall through */ | |
520 | } | |
521 | ||
522 | /* Update loopback test structure */ | |
a81dcd85 EC |
523 | lb_tests->tx_sent[tx_queue->label] += state->packet_count; |
524 | lb_tests->tx_done[tx_queue->label] += tx_done; | |
3273c2e8 BH |
525 | lb_tests->rx_good += rx_good; |
526 | lb_tests->rx_bad += rx_bad; | |
527 | ||
528 | return rc; | |
529 | } | |
530 | ||
531 | static int | |
532 | efx_test_loopback(struct efx_tx_queue *tx_queue, | |
533 | struct efx_loopback_self_tests *lb_tests) | |
534 | { | |
535 | struct efx_nic *efx = tx_queue->efx; | |
8c8661e4 | 536 | struct efx_loopback_state *state = efx->loopback_selftest; |
b9aafb0e | 537 | int i, begin_rc, end_rc; |
3273c2e8 | 538 | |
8c8661e4 | 539 | for (i = 0; i < 3; i++) { |
3273c2e8 | 540 | /* Determine how many packets to send */ |
ecc910f5 | 541 | state->packet_count = efx->txq_entries / 3; |
3273c2e8 | 542 | state->packet_count = min(1 << (i << 2), state->packet_count); |
c2e4e25a TM |
543 | state->skbs = kcalloc(state->packet_count, |
544 | sizeof(state->skbs[0]), GFP_KERNEL); | |
9b7bfc4c BH |
545 | if (!state->skbs) |
546 | return -ENOMEM; | |
dc8cfa55 | 547 | state->flush = false; |
3273c2e8 | 548 | |
62776d03 | 549 | netif_dbg(efx, drv, efx->net_dev, |
a81dcd85 EC |
550 | "TX queue %d (hw %d) testing %s loopback with %d packets\n", |
551 | tx_queue->label, tx_queue->queue, LOOPBACK_MODE(efx), | |
62776d03 | 552 | state->packet_count); |
3273c2e8 BH |
553 | |
554 | efx_iterate_state(efx); | |
b9aafb0e BH |
555 | begin_rc = efx_begin_loopback(tx_queue); |
556 | ||
557 | /* This will normally complete very quickly, but be | |
93e5dfa5 | 558 | * prepared to wait much longer. */ |
b9aafb0e BH |
559 | msleep(1); |
560 | if (!efx_poll_loopback(efx)) { | |
93e5dfa5 | 561 | msleep(LOOPBACK_TIMEOUT_MS); |
b9aafb0e | 562 | efx_poll_loopback(efx); |
3273c2e8 BH |
563 | } |
564 | ||
b9aafb0e | 565 | end_rc = efx_end_loopback(tx_queue, lb_tests); |
3273c2e8 BH |
566 | kfree(state->skbs); |
567 | ||
b9aafb0e | 568 | if (begin_rc || end_rc) { |
3273c2e8 BH |
569 | /* Wait a while to ensure there are no packets |
570 | * floating around after a failure. */ | |
571 | schedule_timeout_uninterruptible(HZ / 10); | |
b9aafb0e | 572 | return begin_rc ? begin_rc : end_rc; |
3273c2e8 BH |
573 | } |
574 | } | |
575 | ||
62776d03 BH |
576 | netif_dbg(efx, drv, efx->net_dev, |
577 | "TX queue %d passed %s loopback test with a burst length " | |
a81dcd85 | 578 | "of %d packets\n", tx_queue->label, LOOPBACK_MODE(efx), |
62776d03 | 579 | state->packet_count); |
3273c2e8 | 580 | |
a0c2c190 | 581 | return 0; |
3273c2e8 BH |
582 | } |
583 | ||
78c1f0a0 SH |
584 | /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
585 | * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it | |
586 | * to delay and retry. Therefore, it's safer to just poll directly. Wait | |
587 | * for link up and any faults to dissipate. */ | |
588 | static int efx_wait_for_link(struct efx_nic *efx) | |
589 | { | |
590 | struct efx_link_state *link_state = &efx->link_state; | |
901d3fe8 | 591 | int count, link_up_count = 0; |
78c1f0a0 SH |
592 | bool link_up; |
593 | ||
594 | for (count = 0; count < 40; count++) { | |
595 | schedule_timeout_uninterruptible(HZ / 10); | |
596 | ||
597 | if (efx->type->monitor != NULL) { | |
598 | mutex_lock(&efx->mac_lock); | |
599 | efx->type->monitor(efx); | |
600 | mutex_unlock(&efx->mac_lock); | |
78c1f0a0 SH |
601 | } |
602 | ||
603 | mutex_lock(&efx->mac_lock); | |
604 | link_up = link_state->up; | |
605 | if (link_up) | |
710b208d | 606 | link_up = !efx->type->check_mac_fault(efx); |
78c1f0a0 SH |
607 | mutex_unlock(&efx->mac_lock); |
608 | ||
901d3fe8 SH |
609 | if (link_up) { |
610 | if (++link_up_count == 2) | |
611 | return 0; | |
612 | } else { | |
613 | link_up_count = 0; | |
614 | } | |
78c1f0a0 SH |
615 | } |
616 | ||
617 | return -ETIMEDOUT; | |
618 | } | |
619 | ||
a5692e49 | 620 | static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
3273c2e8 BH |
621 | unsigned int loopback_modes) |
622 | { | |
8c8661e4 BH |
623 | enum efx_loopback_mode mode; |
624 | struct efx_loopback_state *state; | |
1ac0226e BH |
625 | struct efx_channel *channel = |
626 | efx_get_channel(efx, efx->tx_channel_offset); | |
3273c2e8 | 627 | struct efx_tx_queue *tx_queue; |
78c1f0a0 | 628 | int rc = 0; |
3273c2e8 | 629 | |
8c8661e4 BH |
630 | /* Set the port loopback_selftest member. From this point on |
631 | * all received packets will be dropped. Mark the state as | |
632 | * "flushing" so all inflight packets are dropped */ | |
633 | state = kzalloc(sizeof(*state), GFP_KERNEL); | |
634 | if (state == NULL) | |
635 | return -ENOMEM; | |
636 | BUG_ON(efx->loopback_selftest); | |
637 | state->flush = true; | |
638 | efx->loopback_selftest = state; | |
3273c2e8 BH |
639 | |
640 | /* Test all supported loopback modes */ | |
8c8661e4 | 641 | for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
3273c2e8 BH |
642 | if (!(loopback_modes & (1 << mode))) |
643 | continue; | |
644 | ||
645 | /* Move the port into the specified loopback mode. */ | |
dc8cfa55 | 646 | state->flush = true; |
78c1f0a0 | 647 | mutex_lock(&efx->mac_lock); |
3273c2e8 | 648 | efx->loopback_mode = mode; |
78c1f0a0 SH |
649 | rc = __efx_reconfigure_port(efx); |
650 | mutex_unlock(&efx->mac_lock); | |
651 | if (rc) { | |
62776d03 BH |
652 | netif_err(efx, drv, efx->net_dev, |
653 | "unable to move into %s loopback\n", | |
654 | LOOPBACK_MODE(efx)); | |
78c1f0a0 SH |
655 | goto out; |
656 | } | |
3273c2e8 | 657 | |
78c1f0a0 SH |
658 | rc = efx_wait_for_link(efx); |
659 | if (rc) { | |
62776d03 BH |
660 | netif_err(efx, drv, efx->net_dev, |
661 | "loopback %s never came up\n", | |
662 | LOOPBACK_MODE(efx)); | |
3273c2e8 BH |
663 | goto out; |
664 | } | |
665 | ||
94b274bf | 666 | /* Test all enabled types of TX queue */ |
f7d12cdc | 667 | efx_for_each_channel_tx_queue(tx_queue, channel) { |
12804793 | 668 | state->offload_csum = (tx_queue->type & |
044588b9 | 669 | EFX_TXQ_TYPE_OUTER_CSUM); |
f8ea0b67 BH |
670 | rc = efx_test_loopback(tx_queue, |
671 | &tests->loopback[mode]); | |
3273c2e8 BH |
672 | if (rc) |
673 | goto out; | |
674 | } | |
675 | } | |
676 | ||
677 | out: | |
8c8661e4 | 678 | /* Remove the flush. The caller will remove the loopback setting */ |
dc8cfa55 | 679 | state->flush = true; |
8c8661e4 BH |
680 | efx->loopback_selftest = NULL; |
681 | wmb(); | |
682 | kfree(state); | |
3273c2e8 | 683 | |
27324820 DP |
684 | if (rc == -EPERM) |
685 | rc = 0; | |
686 | ||
3273c2e8 BH |
687 | return rc; |
688 | } | |
689 | ||
690 | /************************************************************************** | |
691 | * | |
2ef3068e | 692 | * Entry point |
3273c2e8 BH |
693 | * |
694 | *************************************************************************/ | |
695 | ||
2ef3068e BH |
696 | int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
697 | unsigned flags) | |
3273c2e8 | 698 | { |
2ef3068e BH |
699 | enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
700 | int phy_mode = efx->phy_mode; | |
d4f2cecc | 701 | int rc_test = 0, rc_reset, rc; |
2ef3068e | 702 | |
dd40781e BH |
703 | efx_selftest_async_cancel(efx); |
704 | ||
2ef3068e BH |
705 | /* Online (i.e. non-disruptive) testing |
706 | * This checks interrupt generation, event delivery and PHY presence. */ | |
8c8661e4 | 707 | |
4f16c073 | 708 | rc = efx_test_phy_alive(efx, tests); |
2ef3068e BH |
709 | if (rc && !rc_test) |
710 | rc_test = rc; | |
8c8661e4 BH |
711 | |
712 | rc = efx_test_nvram(efx, tests); | |
2ef3068e BH |
713 | if (rc && !rc_test) |
714 | rc_test = rc; | |
3273c2e8 | 715 | |
f8ea0b67 | 716 | rc = efx_test_interrupts(efx, tests); |
2ef3068e BH |
717 | if (rc && !rc_test) |
718 | rc_test = rc; | |
8c8661e4 | 719 | |
ed74f480 BH |
720 | rc = efx_test_eventq_irq(efx, tests); |
721 | if (rc && !rc_test) | |
722 | rc_test = rc; | |
8c8661e4 | 723 | |
2ef3068e BH |
724 | if (rc_test) |
725 | return rc_test; | |
3273c2e8 | 726 | |
2ef3068e | 727 | if (!(flags & ETH_TEST_FL_OFFLINE)) |
1796721a | 728 | return efx_test_phy(efx, tests, flags); |
2ef3068e BH |
729 | |
730 | /* Offline (i.e. disruptive) testing | |
731 | * This checks MAC and PHY loopback on the specified port. */ | |
8c8661e4 | 732 | |
e4abce85 BH |
733 | /* Detach the device so the kernel doesn't transmit during the |
734 | * loopback test and the watchdog timeout doesn't fire. | |
8c8661e4 | 735 | */ |
c2f3b8e3 | 736 | efx_device_detach_sync(efx); |
e4abce85 | 737 | |
d4f2cecc BH |
738 | if (efx->type->test_chip) { |
739 | rc_reset = efx->type->test_chip(efx, tests); | |
740 | if (rc_reset) { | |
741 | netif_err(efx, hw, efx->net_dev, | |
742 | "Unable to recover from chip test\n"); | |
743 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
744 | return rc_reset; | |
745 | } | |
8c8661e4 | 746 | |
74cd60a4 | 747 | if ((tests->memory < 0 || tests->registers < 0) && !rc_test) |
d4f2cecc BH |
748 | rc_test = -EIO; |
749 | } | |
8c8661e4 | 750 | |
a5692e49 BH |
751 | /* Ensure that the phy is powered and out of loopback |
752 | * for the bist and loopback tests */ | |
d4f2cecc | 753 | mutex_lock(&efx->mac_lock); |
a5692e49 | 754 | efx->phy_mode &= ~PHY_MODE_LOW_POWER; |
8c8661e4 | 755 | efx->loopback_mode = LOOPBACK_NONE; |
d4f2cecc BH |
756 | __efx_reconfigure_port(efx); |
757 | mutex_unlock(&efx->mac_lock); | |
3273c2e8 | 758 | |
1796721a | 759 | rc = efx_test_phy(efx, tests, flags); |
2ef3068e BH |
760 | if (rc && !rc_test) |
761 | rc_test = rc; | |
3273c2e8 | 762 | |
2ef3068e BH |
763 | rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
764 | if (rc && !rc_test) | |
765 | rc_test = rc; | |
3273c2e8 | 766 | |
8c8661e4 | 767 | /* restore the PHY to the previous state */ |
d3245b28 | 768 | mutex_lock(&efx->mac_lock); |
8c8661e4 | 769 | efx->phy_mode = phy_mode; |
d3245b28 BH |
770 | efx->loopback_mode = loopback_mode; |
771 | __efx_reconfigure_port(efx); | |
772 | mutex_unlock(&efx->mac_lock); | |
8c8661e4 | 773 | |
9c568fd8 | 774 | efx_device_attach_if_not_resetting(efx); |
9d1aea62 | 775 | |
2ef3068e | 776 | return rc_test; |
3273c2e8 BH |
777 | } |
778 | ||
dd40781e BH |
779 | void efx_selftest_async_start(struct efx_nic *efx) |
780 | { | |
781 | struct efx_channel *channel; | |
782 | ||
783 | efx_for_each_channel(channel, efx) | |
784 | efx_nic_event_test_start(channel); | |
785 | schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT); | |
786 | } | |
787 | ||
788 | void efx_selftest_async_cancel(struct efx_nic *efx) | |
789 | { | |
790 | cancel_delayed_work_sync(&efx->selftest_work); | |
791 | } | |
792 | ||
86de7ced | 793 | static void efx_selftest_async_work(struct work_struct *data) |
dd40781e BH |
794 | { |
795 | struct efx_nic *efx = container_of(data, struct efx_nic, | |
796 | selftest_work.work); | |
797 | struct efx_channel *channel; | |
798 | int cpu; | |
799 | ||
800 | efx_for_each_channel(channel, efx) { | |
801 | cpu = efx_nic_event_test_irq_cpu(channel); | |
802 | if (cpu < 0) | |
803 | netif_err(efx, ifup, efx->net_dev, | |
804 | "channel %d failed to trigger an interrupt\n", | |
805 | channel->channel); | |
806 | else | |
807 | netif_dbg(efx, ifup, efx->net_dev, | |
808 | "channel %d triggered interrupt on CPU %d\n", | |
809 | channel->channel, cpu); | |
810 | } | |
811 | } | |
86de7ced AM |
812 | |
813 | void efx_selftest_async_init(struct efx_nic *efx) | |
814 | { | |
815 | INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); | |
816 | } |