1 /**************************************************************************** 2 * Driver for Solarflare network controllers and boards 3 * Copyright 2005-2006 Fen Systems Ltd. 4 * Copyright 2006-2012 Solarflare Communications Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 as published 8 * by the Free Software Foundation, incorporated herein by reference. 9 */ 10 11 #include <linux/netdevice.h> 12 #include <linux/module.h> 13 #include <linux/delay.h> 14 #include <linux/kernel_stat.h> 15 #include <linux/pci.h> 16 #include <linux/ethtool.h> 17 #include <linux/ip.h> 18 #include <linux/in.h> 19 #include <linux/udp.h> 20 #include <linux/rtnetlink.h> 21 #include <linux/slab.h> 22 #include "net_driver.h" 23 #include "efx.h" 24 #include "nic.h" 25 #include "selftest.h" 26 #include "workarounds.h" 27 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 38 /* 39 * Loopback test packet structure 40 * 41 * The self-test should stress every RSS vector, and unfortunately 42 * Falcon only performs RSS on TCP/UDP packets. 43 */ 44 struct efx_loopback_payload { 45 struct ethhdr header; 46 struct iphdr ip; 47 struct udphdr udp; 48 __be16 iteration; 49 char msg[64]; 50 } __packed; 51 52 /* Loopback test source MAC address */ 53 static const u8 payload_source[ETH_ALEN] __aligned(2) = { 54 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b, 55 }; 56 57 static const char payload_msg[] = 58 "Hello world! This is an Efx loopback test in progress!"; 59 60 /* Interrupt mode names */ 61 static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; 62 static const char *const efx_interrupt_mode_names[] = { 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 70 /** 71 * efx_loopback_state - persistent state during a loopback selftest 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 75 * @offload_csum: Checksums are being offloaded 76 * @rx_good: RX good packet count 77 * @rx_bad: RX bad packet count 78 * @payload: Payload used in tests 79 */ 80 struct efx_loopback_state { 81 bool flush; 82 int packet_count; 83 struct sk_buff **skbs; 84 bool offload_csum; 85 atomic_t rx_good; 86 atomic_t rx_bad; 87 struct efx_loopback_payload payload; 88 }; 89 90 /* How long to wait for all the packets to arrive (in ms) */ 91 #define LOOPBACK_TIMEOUT_MS 1000 92 93 /************************************************************************** 94 * 95 * MII, NVRAM and register tests 96 * 97 **************************************************************************/ 98 99 static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests) 100 { 101 int rc = 0; 102 103 if (efx->phy_op->test_alive) { 104 rc = efx->phy_op->test_alive(efx); 105 tests->phy_alive = rc ? -1 : 1; 106 } 107 108 return rc; 109 } 110 111 static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) 112 { 113 int rc = 0; 114 115 if (efx->type->test_nvram) { 116 rc = efx->type->test_nvram(efx); 117 tests->nvram = rc ? -1 : 1; 118 } 119 120 return rc; 121 } 122 123 /************************************************************************** 124 * 125 * Interrupt and event queue testing 126 * 127 **************************************************************************/ 128 129 /* Test generation and receipt of interrupts */ 130 static int efx_test_interrupts(struct efx_nic *efx, 131 struct efx_self_tests *tests) 132 { 133 unsigned long timeout, wait; 134 int cpu; 135 136 netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); 137 tests->interrupt = -1; 138 139 efx_nic_irq_test_start(efx); 140 timeout = jiffies + IRQ_TIMEOUT; 141 wait = 1; 142 143 /* Wait for arrival of test interrupt. */ 144 netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n"); 145 do { 146 schedule_timeout_uninterruptible(wait); 147 cpu = efx_nic_irq_test_irq_cpu(efx); 148 if (cpu >= 0) 149 goto success; 150 wait *= 2; 151 } while (time_before(jiffies, timeout)); 152 153 netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); 154 return -ETIMEDOUT; 155 156 success: 157 netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", 158 INT_MODE(efx), cpu); 159 tests->interrupt = 1; 160 return 0; 161 } 162 163 /* Test generation and receipt of interrupting events */ 164 static int efx_test_eventq_irq(struct efx_nic *efx, 165 struct efx_self_tests *tests) 166 { 167 struct efx_channel *channel; 168 unsigned int read_ptr[EFX_MAX_CHANNELS]; 169 unsigned long napi_ran = 0, dma_pend = 0, int_pend = 0; 170 unsigned long timeout, wait; 171 172 BUILD_BUG_ON(EFX_MAX_CHANNELS > BITS_PER_LONG); 173 174 efx_for_each_channel(channel, efx) { 175 read_ptr[channel->channel] = channel->eventq_read_ptr; 176 set_bit(channel->channel, &dma_pend); 177 set_bit(channel->channel, &int_pend); 178 efx_nic_event_test_start(channel); 179 } 180 181 timeout = jiffies + IRQ_TIMEOUT; 182 wait = 1; 183 184 /* Wait for arrival of interrupts. NAPI processing may or may 185 * not complete in time, but we can cope in any case. 186 */ 187 do { 188 schedule_timeout_uninterruptible(wait); 189 190 efx_for_each_channel(channel, efx) { 191 efx_stop_eventq(channel); 192 if (channel->eventq_read_ptr != 193 read_ptr[channel->channel]) { 194 set_bit(channel->channel, &napi_ran); 195 clear_bit(channel->channel, &dma_pend); 196 clear_bit(channel->channel, &int_pend); 197 } else { 198 if (efx_nic_event_present(channel)) 199 clear_bit(channel->channel, &dma_pend); 200 if (efx_nic_event_test_irq_cpu(channel) >= 0) 201 clear_bit(channel->channel, &int_pend); 202 } 203 efx_start_eventq(channel); 204 } 205 206 wait *= 2; 207 } while ((dma_pend || int_pend) && time_before(jiffies, timeout)); 208 209 efx_for_each_channel(channel, efx) { 210 bool dma_seen = !test_bit(channel->channel, &dma_pend); 211 bool int_seen = !test_bit(channel->channel, &int_pend); 212 213 tests->eventq_dma[channel->channel] = dma_seen ? 1 : -1; 214 tests->eventq_int[channel->channel] = int_seen ? 1 : -1; 215 216 if (dma_seen && int_seen) { 217 netif_dbg(efx, drv, efx->net_dev, 218 "channel %d event queue passed (with%s NAPI)\n", 219 channel->channel, 220 test_bit(channel->channel, &napi_ran) ? 221 "" : "out"); 222 } else { 223 /* Report failure and whether either interrupt or DMA 224 * worked 225 */ 226 netif_err(efx, drv, efx->net_dev, 227 "channel %d timed out waiting for event queue\n", 228 channel->channel); 229 if (int_seen) 230 netif_err(efx, drv, efx->net_dev, 231 "channel %d saw interrupt " 232 "during event queue test\n", 233 channel->channel); 234 if (dma_seen) 235 netif_err(efx, drv, efx->net_dev, 236 "channel %d event was generated, but " 237 "failed to trigger an interrupt\n", 238 channel->channel); 239 } 240 } 241 242 return (dma_pend || int_pend) ? -ETIMEDOUT : 0; 243 } 244 245 static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, 246 unsigned flags) 247 { 248 int rc; 249 250 if (!efx->phy_op->run_tests) 251 return 0; 252 253 mutex_lock(&efx->mac_lock); 254 rc = efx->phy_op->run_tests(efx, tests->phy_ext, flags); 255 mutex_unlock(&efx->mac_lock); 256 return rc; 257 } 258 259 /************************************************************************** 260 * 261 * Loopback testing 262 * NB Only one loopback test can be executing concurrently. 263 * 264 **************************************************************************/ 265 266 /* Loopback test RX callback 267 * This is called for each received packet during loopback testing. 268 */ 269 void efx_loopback_rx_packet(struct efx_nic *efx, 270 const char *buf_ptr, int pkt_len) 271 { 272 struct efx_loopback_state *state = efx->loopback_selftest; 273 struct efx_loopback_payload *received; 274 struct efx_loopback_payload *payload; 275 276 BUG_ON(!buf_ptr); 277 278 /* If we are just flushing, then drop the packet */ 279 if ((state == NULL) || state->flush) 280 return; 281 282 payload = &state->payload; 283 284 received = (struct efx_loopback_payload *) buf_ptr; 285 received->ip.saddr = payload->ip.saddr; 286 if (state->offload_csum) 287 received->ip.check = payload->ip.check; 288 289 /* Check that header exists */ 290 if (pkt_len < sizeof(received->header)) { 291 netif_err(efx, drv, efx->net_dev, 292 "saw runt RX packet (length %d) in %s loopback " 293 "test\n", pkt_len, LOOPBACK_MODE(efx)); 294 goto err; 295 } 296 297 /* Check that the ethernet header exists */ 298 if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { 299 netif_err(efx, drv, efx->net_dev, 300 "saw non-loopback RX packet in %s loopback test\n", 301 LOOPBACK_MODE(efx)); 302 goto err; 303 } 304 305 /* Check packet length */ 306 if (pkt_len != sizeof(*payload)) { 307 netif_err(efx, drv, efx->net_dev, 308 "saw incorrect RX packet length %d (wanted %d) in " 309 "%s loopback test\n", pkt_len, (int)sizeof(*payload), 310 LOOPBACK_MODE(efx)); 311 goto err; 312 } 313 314 /* Check that IP header matches */ 315 if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { 316 netif_err(efx, drv, efx->net_dev, 317 "saw corrupted IP header in %s loopback test\n", 318 LOOPBACK_MODE(efx)); 319 goto err; 320 } 321 322 /* Check that msg and padding matches */ 323 if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { 324 netif_err(efx, drv, efx->net_dev, 325 "saw corrupted RX packet in %s loopback test\n", 326 LOOPBACK_MODE(efx)); 327 goto err; 328 } 329 330 /* Check that iteration matches */ 331 if (received->iteration != payload->iteration) { 332 netif_err(efx, drv, efx->net_dev, 333 "saw RX packet from iteration %d (wanted %d) in " 334 "%s loopback test\n", ntohs(received->iteration), 335 ntohs(payload->iteration), LOOPBACK_MODE(efx)); 336 goto err; 337 } 338 339 /* Increase correct RX count */ 340 netif_vdbg(efx, drv, efx->net_dev, 341 "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); 342 343 atomic_inc(&state->rx_good); 344 return; 345 346 err: 347 #ifdef DEBUG 348 if (atomic_read(&state->rx_bad) == 0) { 349 netif_err(efx, drv, efx->net_dev, "received packet:\n"); 350 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, 351 buf_ptr, pkt_len, 0); 352 netif_err(efx, drv, efx->net_dev, "expected packet:\n"); 353 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, 354 &state->payload, sizeof(state->payload), 0); 355 } 356 #endif 357 atomic_inc(&state->rx_bad); 358 } 359 360 /* Initialise an efx_selftest_state for a new iteration */ 361 static void efx_iterate_state(struct efx_nic *efx) 362 { 363 struct efx_loopback_state *state = efx->loopback_selftest; 364 struct net_device *net_dev = efx->net_dev; 365 struct efx_loopback_payload *payload = &state->payload; 366 367 /* Initialise the layerII header */ 368 ether_addr_copy((u8 *)&payload->header.h_dest, net_dev->dev_addr); 369 ether_addr_copy((u8 *)&payload->header.h_source, payload_source); 370 payload->header.h_proto = htons(ETH_P_IP); 371 372 /* saddr set later and used as incrementing count */ 373 payload->ip.daddr = htonl(INADDR_LOOPBACK); 374 payload->ip.ihl = 5; 375 payload->ip.check = (__force __sum16) htons(0xdead); 376 payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); 377 payload->ip.version = IPVERSION; 378 payload->ip.protocol = IPPROTO_UDP; 379 380 /* Initialise udp header */ 381 payload->udp.source = 0; 382 payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - 383 sizeof(struct iphdr)); 384 payload->udp.check = 0; /* checksum ignored */ 385 386 /* Fill out payload */ 387 payload->iteration = htons(ntohs(payload->iteration) + 1); 388 memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); 389 390 /* Fill out remaining state members */ 391 atomic_set(&state->rx_good, 0); 392 atomic_set(&state->rx_bad, 0); 393 smp_wmb(); 394 } 395 396 static int efx_begin_loopback(struct efx_tx_queue *tx_queue) 397 { 398 struct efx_nic *efx = tx_queue->efx; 399 struct efx_loopback_state *state = efx->loopback_selftest; 400 struct efx_loopback_payload *payload; 401 struct sk_buff *skb; 402 int i; 403 netdev_tx_t rc; 404 405 /* Transmit N copies of buffer */ 406 for (i = 0; i < state->packet_count; i++) { 407 /* Allocate an skb, holding an extra reference for 408 * transmit completion counting */ 409 skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); 410 if (!skb) 411 return -ENOMEM; 412 state->skbs[i] = skb; 413 skb_get(skb); 414 415 /* Copy the payload in, incrementing the source address to 416 * exercise the rss vectors */ 417 payload = ((struct efx_loopback_payload *) 418 skb_put(skb, sizeof(state->payload))); 419 memcpy(payload, &state->payload, sizeof(state->payload)); 420 payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); 421 422 /* Ensure everything we've written is visible to the 423 * interrupt handler. */ 424 smp_wmb(); 425 426 netif_tx_lock_bh(efx->net_dev); 427 rc = efx_enqueue_skb(tx_queue, skb); 428 netif_tx_unlock_bh(efx->net_dev); 429 430 if (rc != NETDEV_TX_OK) { 431 netif_err(efx, drv, efx->net_dev, 432 "TX queue %d could not transmit packet %d of " 433 "%d in %s loopback test\n", tx_queue->queue, 434 i + 1, state->packet_count, 435 LOOPBACK_MODE(efx)); 436 437 /* Defer cleaning up the other skbs for the caller */ 438 kfree_skb(skb); 439 return -EPIPE; 440 } 441 } 442 443 return 0; 444 } 445 446 static int efx_poll_loopback(struct efx_nic *efx) 447 { 448 struct efx_loopback_state *state = efx->loopback_selftest; 449 450 return atomic_read(&state->rx_good) == state->packet_count; 451 } 452 453 static int efx_end_loopback(struct efx_tx_queue *tx_queue, 454 struct efx_loopback_self_tests *lb_tests) 455 { 456 struct efx_nic *efx = tx_queue->efx; 457 struct efx_loopback_state *state = efx->loopback_selftest; 458 struct sk_buff *skb; 459 int tx_done = 0, rx_good, rx_bad; 460 int i, rc = 0; 461 462 netif_tx_lock_bh(efx->net_dev); 463 464 /* Count the number of tx completions, and decrement the refcnt. Any 465 * skbs not already completed will be free'd when the queue is flushed */ 466 for (i = 0; i < state->packet_count; i++) { 467 skb = state->skbs[i]; 468 if (skb && !skb_shared(skb)) 469 ++tx_done; 470 dev_kfree_skb(skb); 471 } 472 473 netif_tx_unlock_bh(efx->net_dev); 474 475 /* Check TX completion and received packet counts */ 476 rx_good = atomic_read(&state->rx_good); 477 rx_bad = atomic_read(&state->rx_bad); 478 if (tx_done != state->packet_count) { 479 /* Don't free the skbs; they will be picked up on TX 480 * overflow or channel teardown. 481 */ 482 netif_err(efx, drv, efx->net_dev, 483 "TX queue %d saw only %d out of an expected %d " 484 "TX completion events in %s loopback test\n", 485 tx_queue->queue, tx_done, state->packet_count, 486 LOOPBACK_MODE(efx)); 487 rc = -ETIMEDOUT; 488 /* Allow to fall through so we see the RX errors as well */ 489 } 490 491 /* We may always be up to a flush away from our desired packet total */ 492 if (rx_good != state->packet_count) { 493 netif_dbg(efx, drv, efx->net_dev, 494 "TX queue %d saw only %d out of an expected %d " 495 "received packets in %s loopback test\n", 496 tx_queue->queue, rx_good, state->packet_count, 497 LOOPBACK_MODE(efx)); 498 rc = -ETIMEDOUT; 499 /* Fall through */ 500 } 501 502 /* Update loopback test structure */ 503 lb_tests->tx_sent[tx_queue->queue] += state->packet_count; 504 lb_tests->tx_done[tx_queue->queue] += tx_done; 505 lb_tests->rx_good += rx_good; 506 lb_tests->rx_bad += rx_bad; 507 508 return rc; 509 } 510 511 static int 512 efx_test_loopback(struct efx_tx_queue *tx_queue, 513 struct efx_loopback_self_tests *lb_tests) 514 { 515 struct efx_nic *efx = tx_queue->efx; 516 struct efx_loopback_state *state = efx->loopback_selftest; 517 int i, begin_rc, end_rc; 518 519 for (i = 0; i < 3; i++) { 520 /* Determine how many packets to send */ 521 state->packet_count = efx->txq_entries / 3; 522 state->packet_count = min(1 << (i << 2), state->packet_count); 523 state->skbs = kcalloc(state->packet_count, 524 sizeof(state->skbs[0]), GFP_KERNEL); 525 if (!state->skbs) 526 return -ENOMEM; 527 state->flush = false; 528 529 netif_dbg(efx, drv, efx->net_dev, 530 "TX queue %d testing %s loopback with %d packets\n", 531 tx_queue->queue, LOOPBACK_MODE(efx), 532 state->packet_count); 533 534 efx_iterate_state(efx); 535 begin_rc = efx_begin_loopback(tx_queue); 536 537 /* This will normally complete very quickly, but be 538 * prepared to wait much longer. */ 539 msleep(1); 540 if (!efx_poll_loopback(efx)) { 541 msleep(LOOPBACK_TIMEOUT_MS); 542 efx_poll_loopback(efx); 543 } 544 545 end_rc = efx_end_loopback(tx_queue, lb_tests); 546 kfree(state->skbs); 547 548 if (begin_rc || end_rc) { 549 /* Wait a while to ensure there are no packets 550 * floating around after a failure. */ 551 schedule_timeout_uninterruptible(HZ / 10); 552 return begin_rc ? begin_rc : end_rc; 553 } 554 } 555 556 netif_dbg(efx, drv, efx->net_dev, 557 "TX queue %d passed %s loopback test with a burst length " 558 "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), 559 state->packet_count); 560 561 return 0; 562 } 563 564 /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but 565 * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it 566 * to delay and retry. Therefore, it's safer to just poll directly. Wait 567 * for link up and any faults to dissipate. */ 568 static int efx_wait_for_link(struct efx_nic *efx) 569 { 570 struct efx_link_state *link_state = &efx->link_state; 571 int count, link_up_count = 0; 572 bool link_up; 573 574 for (count = 0; count < 40; count++) { 575 schedule_timeout_uninterruptible(HZ / 10); 576 577 if (efx->type->monitor != NULL) { 578 mutex_lock(&efx->mac_lock); 579 efx->type->monitor(efx); 580 mutex_unlock(&efx->mac_lock); 581 } 582 583 mutex_lock(&efx->mac_lock); 584 link_up = link_state->up; 585 if (link_up) 586 link_up = !efx->type->check_mac_fault(efx); 587 mutex_unlock(&efx->mac_lock); 588 589 if (link_up) { 590 if (++link_up_count == 2) 591 return 0; 592 } else { 593 link_up_count = 0; 594 } 595 } 596 597 return -ETIMEDOUT; 598 } 599 600 static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, 601 unsigned int loopback_modes) 602 { 603 enum efx_loopback_mode mode; 604 struct efx_loopback_state *state; 605 struct efx_channel *channel = 606 efx_get_channel(efx, efx->tx_channel_offset); 607 struct efx_tx_queue *tx_queue; 608 int rc = 0; 609 610 /* Set the port loopback_selftest member. From this point on 611 * all received packets will be dropped. Mark the state as 612 * "flushing" so all inflight packets are dropped */ 613 state = kzalloc(sizeof(*state), GFP_KERNEL); 614 if (state == NULL) 615 return -ENOMEM; 616 BUG_ON(efx->loopback_selftest); 617 state->flush = true; 618 efx->loopback_selftest = state; 619 620 /* Test all supported loopback modes */ 621 for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { 622 if (!(loopback_modes & (1 << mode))) 623 continue; 624 625 /* Move the port into the specified loopback mode. */ 626 state->flush = true; 627 mutex_lock(&efx->mac_lock); 628 efx->loopback_mode = mode; 629 rc = __efx_reconfigure_port(efx); 630 mutex_unlock(&efx->mac_lock); 631 if (rc) { 632 netif_err(efx, drv, efx->net_dev, 633 "unable to move into %s loopback\n", 634 LOOPBACK_MODE(efx)); 635 goto out; 636 } 637 638 rc = efx_wait_for_link(efx); 639 if (rc) { 640 netif_err(efx, drv, efx->net_dev, 641 "loopback %s never came up\n", 642 LOOPBACK_MODE(efx)); 643 goto out; 644 } 645 646 /* Test all enabled types of TX queue */ 647 efx_for_each_channel_tx_queue(tx_queue, channel) { 648 state->offload_csum = (tx_queue->queue & 649 EFX_TXQ_TYPE_OFFLOAD); 650 rc = efx_test_loopback(tx_queue, 651 &tests->loopback[mode]); 652 if (rc) 653 goto out; 654 } 655 } 656 657 out: 658 /* Remove the flush. The caller will remove the loopback setting */ 659 state->flush = true; 660 efx->loopback_selftest = NULL; 661 wmb(); 662 kfree(state); 663 664 return rc; 665 } 666 667 /************************************************************************** 668 * 669 * Entry point 670 * 671 *************************************************************************/ 672 673 int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, 674 unsigned flags) 675 { 676 enum efx_loopback_mode loopback_mode = efx->loopback_mode; 677 int phy_mode = efx->phy_mode; 678 int rc_test = 0, rc_reset, rc; 679 680 efx_selftest_async_cancel(efx); 681 682 /* Online (i.e. non-disruptive) testing 683 * This checks interrupt generation, event delivery and PHY presence. */ 684 685 rc = efx_test_phy_alive(efx, tests); 686 if (rc && !rc_test) 687 rc_test = rc; 688 689 rc = efx_test_nvram(efx, tests); 690 if (rc && !rc_test) 691 rc_test = rc; 692 693 rc = efx_test_interrupts(efx, tests); 694 if (rc && !rc_test) 695 rc_test = rc; 696 697 rc = efx_test_eventq_irq(efx, tests); 698 if (rc && !rc_test) 699 rc_test = rc; 700 701 if (rc_test) 702 return rc_test; 703 704 if (!(flags & ETH_TEST_FL_OFFLINE)) 705 return efx_test_phy(efx, tests, flags); 706 707 /* Offline (i.e. disruptive) testing 708 * This checks MAC and PHY loopback on the specified port. */ 709 710 /* Detach the device so the kernel doesn't transmit during the 711 * loopback test and the watchdog timeout doesn't fire. 712 */ 713 efx_device_detach_sync(efx); 714 715 if (efx->type->test_chip) { 716 rc_reset = efx->type->test_chip(efx, tests); 717 if (rc_reset) { 718 netif_err(efx, hw, efx->net_dev, 719 "Unable to recover from chip test\n"); 720 efx_schedule_reset(efx, RESET_TYPE_DISABLE); 721 return rc_reset; 722 } 723 724 if ((tests->memory < 0 || tests->registers < 0) && !rc_test) 725 rc_test = -EIO; 726 } 727 728 /* Ensure that the phy is powered and out of loopback 729 * for the bist and loopback tests */ 730 mutex_lock(&efx->mac_lock); 731 efx->phy_mode &= ~PHY_MODE_LOW_POWER; 732 efx->loopback_mode = LOOPBACK_NONE; 733 __efx_reconfigure_port(efx); 734 mutex_unlock(&efx->mac_lock); 735 736 rc = efx_test_phy(efx, tests, flags); 737 if (rc && !rc_test) 738 rc_test = rc; 739 740 rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); 741 if (rc && !rc_test) 742 rc_test = rc; 743 744 /* restore the PHY to the previous state */ 745 mutex_lock(&efx->mac_lock); 746 efx->phy_mode = phy_mode; 747 efx->loopback_mode = loopback_mode; 748 __efx_reconfigure_port(efx); 749 mutex_unlock(&efx->mac_lock); 750 751 netif_device_attach(efx->net_dev); 752 753 return rc_test; 754 } 755 756 void efx_selftest_async_start(struct efx_nic *efx) 757 { 758 struct efx_channel *channel; 759 760 efx_for_each_channel(channel, efx) 761 efx_nic_event_test_start(channel); 762 schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT); 763 } 764 765 void efx_selftest_async_cancel(struct efx_nic *efx) 766 { 767 cancel_delayed_work_sync(&efx->selftest_work); 768 } 769 770 void efx_selftest_async_work(struct work_struct *data) 771 { 772 struct efx_nic *efx = container_of(data, struct efx_nic, 773 selftest_work.work); 774 struct efx_channel *channel; 775 int cpu; 776 777 efx_for_each_channel(channel, efx) { 778 cpu = efx_nic_event_test_irq_cpu(channel); 779 if (cpu < 0) 780 netif_err(efx, ifup, efx->net_dev, 781 "channel %d failed to trigger an interrupt\n", 782 channel->channel); 783 else 784 netif_dbg(efx, ifup, efx->net_dev, 785 "channel %d triggered interrupt on CPU %d\n", 786 channel->channel, cpu); 787 } 788 } 789