drivers/net/sfc/selftest.c

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2005-2006 Fen Systems Ltd.
   4  * Copyright 2006-2008 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 <asm/io.h>
  22 #include "net_driver.h"
  23 #include "ethtool.h"
  24 #include "efx.h"
  25 #include "falcon.h"
  26 #include "selftest.h"
  27 #include "boards.h"
  28 #include "workarounds.h"
  29 #include "spi.h"
  30 #include "falcon_io.h"
  31 #include "mdio_10g.h"
  32
  33 /*
  34  * Loopback test packet structure
  35  *
  36  * The self-test should stress every RSS vector, and unfortunately
  37  * Falcon only performs RSS on TCP/UDP packets.
  38  */
  39 struct efx_loopback_payload {
  40         struct ethhdr header;
  41         struct iphdr ip;
  42         struct udphdr udp;
  43         __be16 iteration;
  44         const char msg[64];
  45 } __attribute__ ((packed));
  46
  47 /* Loopback test source MAC address */
  48 static const unsigned char payload_source[ETH_ALEN] = {
  49         0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b,
  50 };
  51
  52 static const char *payload_msg =
  53         "Hello world! This is an Efx loopback test in progress!";
  54
  55 /**
  56  * efx_loopback_state - persistent state during a loopback selftest
  57  * @flush:              Drop all packets in efx_loopback_rx_packet
  58  * @packet_count:       Number of packets being used in this test
  59  * @skbs:               An array of skbs transmitted
  60  * @rx_good:            RX good packet count
  61  * @rx_bad:             RX bad packet count
  62  * @payload:            Payload used in tests
  63  */
  64 struct efx_loopback_state {
  65         bool flush;
  66         int packet_count;
  67         struct sk_buff **skbs;
  68
  69         /* Checksums are being offloaded */
  70         bool offload_csum;
  71
  72         atomic_t rx_good;
  73         atomic_t rx_bad;
  74         struct efx_loopback_payload payload;
  75 };
  76
  77 /**************************************************************************
  78  *
  79  * MII, NVRAM and register tests
  80  *
  81  **************************************************************************/
  82
  83 static int efx_test_mii(struct efx_nic *efx, struct efx_self_tests *tests)
  84 {
  85         int rc = 0;
  86         u16 physid1, physid2;
  87         struct mii_if_info *mii = &efx->mii;
  88         struct net_device *net_dev = efx->net_dev;
  89
  90         if (efx->phy_type == PHY_TYPE_NONE)
  91                 return 0;
  92
  93         mutex_lock(&efx->mac_lock);
  94         tests->mii = -1;
  95
  96         physid1 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID1);
  97         physid2 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID2);
  98
  99         if ((physid1 == 0x0000) || (physid1 == 0xffff) ||
 100             (physid2 == 0x0000) || (physid2 == 0xffff)) {
 101                 EFX_ERR(efx, "no MII PHY present with ID %d\n",
 102                         mii->phy_id);
 103                 rc = -EINVAL;
 104                 goto out;
 105         }
 106
 107         if (EFX_IS10G(efx)) {
 108                 rc = mdio_clause45_check_mmds(efx, efx->phy_op->mmds, 0);
 109                 if (rc)
 110                         goto out;
 111         }
 112
 113 out:
 114         mutex_unlock(&efx->mac_lock);
 115         tests->mii = rc ? -1 : 1;
 116         return rc;
 117 }
 118
 119 static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests)
 120 {
 121         int rc;
 122
 123         rc = falcon_read_nvram(efx, NULL);
 124         tests->nvram = rc ? -1 : 1;
 125         return rc;
 126 }
 127
 128 static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests)
 129 {
 130         int rc;
 131
 132         /* Not supported on A-series silicon */
 133         if (falcon_rev(efx) < FALCON_REV_B0)
 134                 return 0;
 135
 136         rc = falcon_test_registers(efx);
 137         tests->registers = rc ? -1 : 1;
 138         return rc;
 139 }
 140
 141 /**************************************************************************
 142  *
 143  * Interrupt and event queue testing
 144  *
 145  **************************************************************************/
 146
 147 /* Test generation and receipt of interrupts */
 148 static int efx_test_interrupts(struct efx_nic *efx,
 149                                struct efx_self_tests *tests)
 150 {
 151         struct efx_channel *channel;
 152
 153         EFX_LOG(efx, "testing interrupts\n");
 154         tests->interrupt = -1;
 155
 156         /* Reset interrupt flag */
 157         efx->last_irq_cpu = -1;
 158         smp_wmb();
 159
 160         /* ACK each interrupting event queue. Receiving an interrupt due to
 161          * traffic before a test event is raised is considered a pass */
 162         efx_for_each_channel(channel, efx) {
 163                 if (channel->work_pending)
 164                         efx_process_channel_now(channel);
 165                 if (efx->last_irq_cpu >= 0)
 166                         goto success;
 167         }
 168
 169         falcon_generate_interrupt(efx);
 170
 171         /* Wait for arrival of test interrupt. */
 172         EFX_LOG(efx, "waiting for test interrupt\n");
 173         schedule_timeout_uninterruptible(HZ / 10);
 174         if (efx->last_irq_cpu >= 0)
 175                 goto success;
 176
 177         EFX_ERR(efx, "timed out waiting for interrupt\n");
 178         return -ETIMEDOUT;
 179
 180  success:
 181         EFX_LOG(efx, "test interrupt (mode %d) seen on CPU%d\n",
 182                 efx->interrupt_mode, efx->last_irq_cpu);
 183         tests->interrupt = 1;
 184         return 0;
 185 }
 186
 187 /* Test generation and receipt of interrupting events */
 188 static int efx_test_eventq_irq(struct efx_channel *channel,
 189                                struct efx_self_tests *tests)
 190 {
 191         unsigned int magic, count;
 192
 193         /* Channel specific code, limited to 20 bits */
 194         magic = (0x00010150 + channel->channel);
 195         EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n",
 196                 channel->channel, magic);
 197
 198         tests->eventq_dma[channel->channel] = -1;
 199         tests->eventq_int[channel->channel] = -1;
 200         tests->eventq_poll[channel->channel] = -1;
 201
 202         /* Reset flag and zero magic word */
 203         channel->efx->last_irq_cpu = -1;
 204         channel->eventq_magic = 0;
 205         smp_wmb();
 206
 207         falcon_generate_test_event(channel, magic);
 208
 209         /* Wait for arrival of interrupt */
 210         count = 0;
 211         do {
 212                 schedule_timeout_uninterruptible(HZ / 100);
 213
 214                 if (channel->work_pending)
 215                         efx_process_channel_now(channel);
 216
 217                 if (channel->eventq_magic == magic)
 218                         goto eventq_ok;
 219         } while (++count < 2);
 220
 221         EFX_ERR(channel->efx, "channel %d timed out waiting for event queue\n",
 222                 channel->channel);
 223
 224         /* See if interrupt arrived */
 225         if (channel->efx->last_irq_cpu >= 0) {
 226                 EFX_ERR(channel->efx, "channel %d saw interrupt on CPU%d "
 227                         "during event queue test\n", channel->channel,
 228                         raw_smp_processor_id());
 229                 tests->eventq_int[channel->channel] = 1;
 230         }
 231
 232         /* Check to see if event was received even if interrupt wasn't */
 233         efx_process_channel_now(channel);
 234         if (channel->eventq_magic == magic) {
 235                 EFX_ERR(channel->efx, "channel %d event was generated, but "
 236                         "failed to trigger an interrupt\n", channel->channel);
 237                 tests->eventq_dma[channel->channel] = 1;
 238         }
 239
 240         return -ETIMEDOUT;
 241  eventq_ok:
 242         EFX_LOG(channel->efx, "channel %d event queue passed\n",
 243                 channel->channel);
 244         tests->eventq_dma[channel->channel] = 1;
 245         tests->eventq_int[channel->channel] = 1;
 246         tests->eventq_poll[channel->channel] = 1;
 247         return 0;
 248 }
 249
 250 static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests)
 251 {
 252         int rc;
 253
 254         if (!efx->phy_op->test)
 255                 return 0;
 256
 257         mutex_lock(&efx->mac_lock);
 258         rc = efx->phy_op->test(efx);
 259         mutex_unlock(&efx->mac_lock);
 260         tests->phy = rc ? -1 : 1;
 261         return rc;
 262 }
 263
 264 /**************************************************************************
 265  *
 266  * Loopback testing
 267  * NB Only one loopback test can be executing concurrently.
 268  *
 269  **************************************************************************/
 270
 271 /* Loopback test RX callback
 272  * This is called for each received packet during loopback testing.
 273  */
 274 void efx_loopback_rx_packet(struct efx_nic *efx,
 275                             const char *buf_ptr, int pkt_len)
 276 {
 277         struct efx_loopback_state *state = efx->loopback_selftest;
 278         struct efx_loopback_payload *received;
 279         struct efx_loopback_payload *payload;
 280
 281         BUG_ON(!buf_ptr);
 282
 283         /* If we are just flushing, then drop the packet */
 284         if ((state == NULL) || state->flush)
 285                 return;
 286
 287         payload = &state->payload;
 288
 289         received = (struct efx_loopback_payload *) buf_ptr;
 290         received->ip.saddr = payload->ip.saddr;
 291         if (state->offload_csum)
 292                 received->ip.check = payload->ip.check;
 293
 294         /* Check that header exists */
 295         if (pkt_len < sizeof(received->header)) {
 296                 EFX_ERR(efx, "saw runt RX packet (length %d) in %s loopback "
 297                         "test\n", pkt_len, LOOPBACK_MODE(efx));
 298                 goto err;
 299         }
 300
 301         /* Check that the ethernet header exists */
 302         if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) {
 303                 EFX_ERR(efx, "saw non-loopback RX packet in %s loopback test\n",
 304                         LOOPBACK_MODE(efx));
 305                 goto err;
 306         }
 307
 308         /* Check packet length */
 309         if (pkt_len != sizeof(*payload)) {
 310                 EFX_ERR(efx, "saw incorrect RX packet length %d (wanted %d) in "
 311                         "%s loopback test\n", pkt_len, (int)sizeof(*payload),
 312                         LOOPBACK_MODE(efx));
 313                 goto err;
 314         }
 315
 316         /* Check that IP header matches */
 317         if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) {
 318                 EFX_ERR(efx, "saw corrupted IP header in %s loopback test\n",
 319                         LOOPBACK_MODE(efx));
 320                 goto err;
 321         }
 322
 323         /* Check that msg and padding matches */
 324         if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) {
 325                 EFX_ERR(efx, "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                 EFX_ERR(efx, "saw RX packet from iteration %d (wanted %d) in "
 333                         "%s loopback test\n", ntohs(received->iteration),
 334                         ntohs(payload->iteration), LOOPBACK_MODE(efx));
 335                 goto err;
 336         }
 337
 338         /* Increase correct RX count */
 339         EFX_TRACE(efx, "got loopback RX in %s loopback test\n",
 340                   LOOPBACK_MODE(efx));
 341
 342         atomic_inc(&state->rx_good);
 343         return;
 344
 345  err:
 346 #ifdef EFX_ENABLE_DEBUG
 347         if (atomic_read(&state->rx_bad) == 0) {
 348                 EFX_ERR(efx, "received packet:\n");
 349                 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
 350                                buf_ptr, pkt_len, 0);
 351                 EFX_ERR(efx, "expected packet:\n");
 352                 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
 353                                &state->payload, sizeof(state->payload), 0);
 354         }
 355 #endif
 356         atomic_inc(&state->rx_bad);
 357 }
 358
 359 /* Initialise an efx_selftest_state for a new iteration */
 360 static void efx_iterate_state(struct efx_nic *efx)
 361 {
 362         struct efx_loopback_state *state = efx->loopback_selftest;
 363         struct net_device *net_dev = efx->net_dev;
 364         struct efx_loopback_payload *payload = &state->payload;
 365
 366         /* Initialise the layerII header */
 367         memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN);
 368         memcpy(&payload->header.h_source, &payload_source, ETH_ALEN);
 369         payload->header.h_proto = htons(ETH_P_IP);
 370
 371         /* saddr set later and used as incrementing count */
 372         payload->ip.daddr = htonl(INADDR_LOOPBACK);
 373         payload->ip.ihl = 5;
 374         payload->ip.check = htons(0xdead);
 375         payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr));
 376         payload->ip.version = IPVERSION;
 377         payload->ip.protocol = IPPROTO_UDP;
 378
 379         /* Initialise udp header */
 380         payload->udp.source = 0;
 381         payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) -
 382                                  sizeof(struct iphdr));
 383         payload->udp.check = 0; /* checksum ignored */
 384
 385         /* Fill out payload */
 386         payload->iteration = htons(ntohs(payload->iteration) + 1);
 387         memcpy(&payload->msg, payload_msg, sizeof(payload_msg));
 388
 389         /* Fill out remaining state members */
 390         atomic_set(&state->rx_good, 0);
 391         atomic_set(&state->rx_bad, 0);
 392         smp_wmb();
 393 }
 394
 395 static int efx_begin_loopback(struct efx_tx_queue *tx_queue)
 396 {
 397         struct efx_nic *efx = tx_queue->efx;
 398         struct efx_loopback_state *state = efx->loopback_selftest;
 399         struct efx_loopback_payload *payload;
 400         struct sk_buff *skb;
 401         int i, rc;
 402
 403         /* Transmit N copies of buffer */
 404         for (i = 0; i < state->packet_count; i++) {
 405                 /* Allocate an skb, holding an extra reference for
 406                  * transmit completion counting */
 407                 skb = alloc_skb(sizeof(state->payload), GFP_KERNEL);
 408                 if (!skb)
 409                         return -ENOMEM;
 410                 state->skbs[i] = skb;
 411                 skb_get(skb);
 412
 413                 /* Copy the payload in, incrementing the source address to
 414                  * exercise the rss vectors */
 415                 payload = ((struct efx_loopback_payload *)
 416                            skb_put(skb, sizeof(state->payload)));
 417                 memcpy(payload, &state->payload, sizeof(state->payload));
 418                 payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2));
 419
 420                 /* Ensure everything we've written is visible to the
 421                  * interrupt handler. */
 422                 smp_wmb();
 423
 424                 if (efx_dev_registered(efx))
 425                         netif_tx_lock_bh(efx->net_dev);
 426                 rc = efx_xmit(efx, tx_queue, skb);
 427                 if (efx_dev_registered(efx))
 428                         netif_tx_unlock_bh(efx->net_dev);
 429
 430                 if (rc != NETDEV_TX_OK) {
 431                         EFX_ERR(efx, "TX queue %d could not transmit packet %d "
 432                                 "of %d in %s loopback test\n", tx_queue->queue,
 433                                 i + 1, state->packet_count, LOOPBACK_MODE(efx));
 434
 435                         /* Defer cleaning up the other skbs for the caller */
 436                         kfree_skb(skb);
 437                         return -EPIPE;
 438                 }
 439         }
 440
 441         return 0;
 442 }
 443
 444 static int efx_poll_loopback(struct efx_nic *efx)
 445 {
 446         struct efx_loopback_state *state = efx->loopback_selftest;
 447         struct efx_channel *channel;
 448
 449         /* NAPI polling is not enabled, so process channels
 450          * synchronously */
 451         efx_for_each_channel(channel, efx) {
 452                 if (channel->work_pending)
 453                         efx_process_channel_now(channel);
 454         }
 455         return atomic_read(&state->rx_good) == state->packet_count;
 456 }
 457
 458 static int efx_end_loopback(struct efx_tx_queue *tx_queue,
 459                             struct efx_loopback_self_tests *lb_tests)
 460 {
 461         struct efx_nic *efx = tx_queue->efx;
 462         struct efx_loopback_state *state = efx->loopback_selftest;
 463         struct sk_buff *skb;
 464         int tx_done = 0, rx_good, rx_bad;
 465         int i, rc = 0;
 466
 467         if (efx_dev_registered(efx))
 468                 netif_tx_lock_bh(efx->net_dev);
 469
 470         /* Count the number of tx completions, and decrement the refcnt. Any
 471          * skbs not already completed will be free'd when the queue is flushed */
 472         for (i=0; i < state->packet_count; i++) {
 473                 skb = state->skbs[i];
 474                 if (skb && !skb_shared(skb))
 475                         ++tx_done;
 476                 dev_kfree_skb_any(skb);
 477         }
 478
 479         if (efx_dev_registered(efx))
 480                 netif_tx_unlock_bh(efx->net_dev);
 481
 482         /* Check TX completion and received packet counts */
 483         rx_good = atomic_read(&state->rx_good);
 484         rx_bad = atomic_read(&state->rx_bad);
 485         if (tx_done != state->packet_count) {
 486                 /* Don't free the skbs; they will be picked up on TX
 487                  * overflow or channel teardown.
 488                  */
 489                 EFX_ERR(efx, "TX queue %d saw only %d out of an expected %d "
 490                         "TX completion events in %s loopback test\n",
 491                         tx_queue->queue, tx_done, state->packet_count,
 492                         LOOPBACK_MODE(efx));
 493                 rc = -ETIMEDOUT;
 494                 /* Allow to fall through so we see the RX errors as well */
 495         }
 496
 497         /* We may always be up to a flush away from our desired packet total */
 498         if (rx_good != state->packet_count) {
 499                 EFX_LOG(efx, "TX queue %d saw only %d out of an expected %d "
 500                         "received packets in %s loopback test\n",
 501                         tx_queue->queue, rx_good, state->packet_count,
 502                         LOOPBACK_MODE(efx));
 503                 rc = -ETIMEDOUT;
 504                 /* Fall through */
 505         }
 506
 507         /* Update loopback test structure */
 508         lb_tests->tx_sent[tx_queue->queue] += state->packet_count;
 509         lb_tests->tx_done[tx_queue->queue] += tx_done;
 510         lb_tests->rx_good += rx_good;
 511         lb_tests->rx_bad += rx_bad;
 512
 513         return rc;
 514 }
 515
 516 static int
 517 efx_test_loopback(struct efx_tx_queue *tx_queue,
 518                   struct efx_loopback_self_tests *lb_tests)
 519 {
 520         struct efx_nic *efx = tx_queue->efx;
 521         struct efx_loopback_state *state = efx->loopback_selftest;
 522         int i, begin_rc, end_rc;
 523
 524         for (i = 0; i < 3; i++) {
 525                 /* Determine how many packets to send */
 526                 state->packet_count = (efx->type->txd_ring_mask + 1) / 3;
 527                 state->packet_count = min(1 << (i << 2), state->packet_count);
 528                 state->skbs = kzalloc(sizeof(state->skbs[0]) *
 529                                       state->packet_count, GFP_KERNEL);
 530                 if (!state->skbs)
 531                         return -ENOMEM;
 532                 state->flush = false;
 533
 534                 EFX_LOG(efx, "TX queue %d testing %s loopback with %d "
 535                         "packets\n", tx_queue->queue, LOOPBACK_MODE(efx),
 536                         state->packet_count);
 537
 538                 efx_iterate_state(efx);
 539                 begin_rc = efx_begin_loopback(tx_queue);
 540
 541                 /* This will normally complete very quickly, but be
 542                  * prepared to wait up to 100 ms. */
 543                 msleep(1);
 544                 if (!efx_poll_loopback(efx)) {
 545                         msleep(100);
 546                         efx_poll_loopback(efx);
 547                 }
 548
 549                 end_rc = efx_end_loopback(tx_queue, lb_tests);
 550                 kfree(state->skbs);
 551
 552                 if (begin_rc || end_rc) {
 553                         /* Wait a while to ensure there are no packets
 554                          * floating around after a failure. */
 555                         schedule_timeout_uninterruptible(HZ / 10);
 556                         return begin_rc ? begin_rc : end_rc;
 557                 }
 558         }
 559
 560         EFX_LOG(efx, "TX queue %d passed %s loopback test with a burst length "
 561                 "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx),
 562                 state->packet_count);
 563
 564         return 0;
 565 }
 566
 567 static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests,
 568                               unsigned int loopback_modes)
 569 {
 570         enum efx_loopback_mode mode;
 571         struct efx_loopback_state *state;
 572         struct efx_tx_queue *tx_queue;
 573         bool link_up;
 574         int count, rc = 0;
 575
 576         /* Set the port loopback_selftest member. From this point on
 577          * all received packets will be dropped. Mark the state as
 578          * "flushing" so all inflight packets are dropped */
 579         state = kzalloc(sizeof(*state), GFP_KERNEL);
 580         if (state == NULL)
 581                 return -ENOMEM;
 582         BUG_ON(efx->loopback_selftest);
 583         state->flush = true;
 584         efx->loopback_selftest = state;
 585
 586         /* Test all supported loopback modes */
 587         for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) {
 588                 if (!(loopback_modes & (1 << mode)))
 589                         continue;
 590
 591                 /* Move the port into the specified loopback mode. */
 592                 state->flush = true;
 593                 efx->loopback_mode = mode;
 594                 efx_reconfigure_port(efx);
 595
 596                 /* Wait for the PHY to signal the link is up. Interrupts
 597                  * are enabled for PHY's using LASI, otherwise we poll()
 598                  * quickly */
 599                 count = 0;
 600                 do {
 601                         struct efx_channel *channel = &efx->channel[0];
 602
 603                         efx->phy_op->poll(efx);
 604                         schedule_timeout_uninterruptible(HZ / 10);
 605                         if (channel->work_pending)
 606                                 efx_process_channel_now(channel);
 607                         /* Wait for PHY events to be processed */
 608                         flush_workqueue(efx->workqueue);
 609                         rmb();
 610
 611                         /* We need both the phy and xaui links to be ok.
 612                          * rather than relying on the falcon_xmac irq/poll
 613                          * regime, just poll xaui directly */
 614                         link_up = efx->link_up;
 615                         if (link_up && EFX_IS10G(efx) &&
 616                             !falcon_xaui_link_ok(efx))
 617                                 link_up = false;
 618
 619                 } while ((++count < 20) && !link_up);
 620
 621                 /* The link should now be up. If it isn't, there is no point
 622                  * in attempting a loopback test */
 623                 if (!link_up) {
 624                         EFX_ERR(efx, "loopback %s never came up\n",
 625                                 LOOPBACK_MODE(efx));
 626                         rc = -EIO;
 627                         goto out;
 628                 }
 629
 630                 EFX_LOG(efx, "link came up in %s loopback in %d iterations\n",
 631                         LOOPBACK_MODE(efx), count);
 632
 633                 /* Test every TX queue */
 634                 efx_for_each_tx_queue(tx_queue, efx) {
 635                         state->offload_csum = (tx_queue->queue ==
 636                                                EFX_TX_QUEUE_OFFLOAD_CSUM);
 637                         rc = efx_test_loopback(tx_queue,
 638                                                &tests->loopback[mode]);
 639                         if (rc)
 640                                 goto out;
 641                 }
 642         }
 643
 644  out:
 645         /* Remove the flush. The caller will remove the loopback setting */
 646         state->flush = true;
 647         efx->loopback_selftest = NULL;
 648         wmb();
 649         kfree(state);
 650
 651         return rc;
 652 }
 653
 654 /**************************************************************************
 655  *
 656  * Entry points
 657  *
 658  *************************************************************************/
 659
 660 /* Online (i.e. non-disruptive) testing
 661  * This checks interrupt generation, event delivery and PHY presence. */
 662 int efx_online_test(struct efx_nic *efx, struct efx_self_tests *tests)
 663 {
 664         struct efx_channel *channel;
 665         int rc, rc2 = 0;
 666
 667         rc = efx_test_mii(efx, tests);
 668         if (rc && !rc2)
 669                 rc2 = rc;
 670
 671         rc = efx_test_nvram(efx, tests);
 672         if (rc && !rc2)
 673                 rc2 = rc;
 674
 675         rc = efx_test_interrupts(efx, tests);
 676         if (rc && !rc2)
 677                 rc2 = rc;
 678
 679         efx_for_each_channel(channel, efx) {
 680                 rc = efx_test_eventq_irq(channel, tests);
 681                 if (rc && !rc2)
 682                         rc2 = rc;
 683         }
 684
 685         return rc2;
 686 }
 687
 688 /* Offline (i.e. disruptive) testing
 689  * This checks MAC and PHY loopback on the specified port. */
 690 int efx_offline_test(struct efx_nic *efx,
 691                      struct efx_self_tests *tests, unsigned int loopback_modes)
 692 {
 693         enum efx_loopback_mode loopback_mode = efx->loopback_mode;
 694         int phy_mode = efx->phy_mode;
 695         struct ethtool_cmd ecmd;
 696         int rc, rc2 = 0;
 697
 698         /* force the carrier state off so the kernel doesn't transmit during
 699          * the loopback test, and the watchdog timeout doesn't fire. Also put
 700          * falcon into loopback for the register test.
 701          */
 702         mutex_lock(&efx->mac_lock);
 703         efx->port_inhibited = true;
 704         if (efx->loopback_modes) {
 705                 /* We need the 312 clock from the PHY to test the XMAC
 706                  * registers, so move into XGMII loopback if available */
 707                 if (efx->loopback_modes & (1 << LOOPBACK_XGMII))
 708                         efx->loopback_mode = LOOPBACK_XGMII;
 709                 else
 710                         efx->loopback_mode = __ffs(efx->loopback_modes);
 711         }
 712
 713         __efx_reconfigure_port(efx);
 714         mutex_unlock(&efx->mac_lock);
 715
 716         /* free up all consumers of SRAM (including all the queues) */
 717         efx_reset_down(efx, &ecmd);
 718
 719         rc = efx_test_chip(efx, tests);
 720         if (rc && !rc2)
 721                 rc2 = rc;
 722
 723         /* reset the chip to recover from the register test */
 724         rc = falcon_reset_hw(efx, RESET_TYPE_ALL);
 725
 726         /* Ensure that the phy is powered and out of loopback
 727          * for the bist and loopback tests */
 728         efx->phy_mode &= ~PHY_MODE_LOW_POWER;
 729         efx->loopback_mode = LOOPBACK_NONE;
 730
 731         rc = efx_reset_up(efx, &ecmd, rc == 0);
 732         if (rc) {
 733                 EFX_ERR(efx, "Unable to recover from chip test\n");
 734                 efx_schedule_reset(efx, RESET_TYPE_DISABLE);
 735                 return rc;
 736         }
 737
 738         rc = efx_test_phy(efx, tests);
 739         if (rc && !rc2)
 740                 rc2 = rc;
 741
 742         rc = efx_test_loopbacks(efx, tests, loopback_modes);
 743         if (rc && !rc2)
 744                 rc2 = rc;
 745
 746         /* restore the PHY to the previous state */
 747         efx->loopback_mode = loopback_mode;
 748         efx->phy_mode = phy_mode;
 749         efx->port_inhibited = false;
 750         efx_ethtool_set_settings(efx->net_dev, &ecmd);
 751
 752         return rc2;
 753 }
 754