| /**************************************************************************** |
| * Driver for Solarflare Solarstorm network controllers and boards |
| * Copyright 2005-2006 Fen Systems Ltd. |
| * Copyright 2006-2010 Solarflare Communications Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published |
| * by the Free Software Foundation, incorporated herein by reference. |
| */ |
| |
| #include <linux/netdevice.h> |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| #include <linux/kernel_stat.h> |
| #include <linux/pci.h> |
| #include <linux/ethtool.h> |
| #include <linux/ip.h> |
| #include <linux/in.h> |
| #include <linux/udp.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/slab.h> |
| #include "net_driver.h" |
| #include "efx.h" |
| #include "nic.h" |
| #include "selftest.h" |
| #include "workarounds.h" |
| |
| /* IRQ latency can be enormous because: |
| * - All IRQs may be disabled on a CPU for a *long* time by e.g. a |
| * slow serial console or an old IDE driver doing error recovery |
| * - The PREEMPT_RT patches mostly deal with this, but also allow a |
| * tasklet or normal task to be given higher priority than our IRQ |
| * threads |
| * Try to avoid blaming the hardware for this. |
| */ |
| #define IRQ_TIMEOUT HZ |
| |
| /* |
| * Loopback test packet structure |
| * |
| * The self-test should stress every RSS vector, and unfortunately |
| * Falcon only performs RSS on TCP/UDP packets. |
| */ |
| struct efx_loopback_payload { |
| struct ethhdr header; |
| struct iphdr ip; |
| struct udphdr udp; |
| __be16 iteration; |
| const char msg[64]; |
| } __packed; |
| |
| /* Loopback test source MAC address */ |
| static const unsigned char payload_source[ETH_ALEN] = { |
| 0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b, |
| }; |
| |
| static const char payload_msg[] = |
| "Hello world! This is an Efx loopback test in progress!"; |
| |
| /* Interrupt mode names */ |
| static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; |
| static const char *const efx_interrupt_mode_names[] = { |
| [EFX_INT_MODE_MSIX] = "MSI-X", |
| [EFX_INT_MODE_MSI] = "MSI", |
| [EFX_INT_MODE_LEGACY] = "legacy", |
| }; |
| #define INT_MODE(efx) \ |
| STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode) |
| |
| /** |
| * efx_loopback_state - persistent state during a loopback selftest |
| * @flush: Drop all packets in efx_loopback_rx_packet |
| * @packet_count: Number of packets being used in this test |
| * @skbs: An array of skbs transmitted |
| * @offload_csum: Checksums are being offloaded |
| * @rx_good: RX good packet count |
| * @rx_bad: RX bad packet count |
| * @payload: Payload used in tests |
| */ |
| struct efx_loopback_state { |
| bool flush; |
| int packet_count; |
| struct sk_buff **skbs; |
| bool offload_csum; |
| atomic_t rx_good; |
| atomic_t rx_bad; |
| struct efx_loopback_payload payload; |
| }; |
| |
| /* How long to wait for all the packets to arrive (in ms) */ |
| #define LOOPBACK_TIMEOUT_MS 1000 |
| |
| /************************************************************************** |
| * |
| * MII, NVRAM and register tests |
| * |
| **************************************************************************/ |
| |
| static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests) |
| { |
| int rc = 0; |
| |
| if (efx->phy_op->test_alive) { |
| rc = efx->phy_op->test_alive(efx); |
| tests->phy_alive = rc ? -1 : 1; |
| } |
| |
| return rc; |
| } |
| |
| static int efx_test_nvram(struct efx_nic *efx, struct efx_self_tests *tests) |
| { |
| int rc = 0; |
| |
| if (efx->type->test_nvram) { |
| rc = efx->type->test_nvram(efx); |
| tests->nvram = rc ? -1 : 1; |
| } |
| |
| return rc; |
| } |
| |
| /************************************************************************** |
| * |
| * Interrupt and event queue testing |
| * |
| **************************************************************************/ |
| |
| /* Test generation and receipt of interrupts */ |
| static int efx_test_interrupts(struct efx_nic *efx, |
| struct efx_self_tests *tests) |
| { |
| unsigned long timeout, wait; |
| int cpu; |
| |
| netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); |
| tests->interrupt = -1; |
| |
| efx_nic_irq_test_start(efx); |
| timeout = jiffies + IRQ_TIMEOUT; |
| wait = 1; |
| |
| /* Wait for arrival of test interrupt. */ |
| netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n"); |
| do { |
| schedule_timeout_uninterruptible(wait); |
| cpu = efx_nic_irq_test_irq_cpu(efx); |
| if (cpu >= 0) |
| goto success; |
| wait *= 2; |
| } while (time_before(jiffies, timeout)); |
| |
| netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); |
| return -ETIMEDOUT; |
| |
| success: |
| netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", |
| INT_MODE(efx), cpu); |
| tests->interrupt = 1; |
| return 0; |
| } |
| |
| /* Test generation and receipt of interrupting events */ |
| static int efx_test_eventq_irq(struct efx_nic *efx, |
| struct efx_self_tests *tests) |
| { |
| struct efx_channel *channel; |
| unsigned int read_ptr[EFX_MAX_CHANNELS]; |
| unsigned long napi_ran = 0, dma_pend = 0, int_pend = 0; |
| unsigned long timeout, wait; |
| |
| BUILD_BUG_ON(EFX_MAX_CHANNELS > BITS_PER_LONG); |
| |
| efx_for_each_channel(channel, efx) { |
| read_ptr[channel->channel] = channel->eventq_read_ptr; |
| set_bit(channel->channel, &dma_pend); |
| set_bit(channel->channel, &int_pend); |
| efx_nic_event_test_start(channel); |
| } |
| |
| timeout = jiffies + IRQ_TIMEOUT; |
| wait = 1; |
| |
| /* Wait for arrival of interrupts. NAPI processing may or may |
| * not complete in time, but we can cope in any case. |
| */ |
| do { |
| schedule_timeout_uninterruptible(wait); |
| |
| efx_for_each_channel(channel, efx) { |
| napi_disable(&channel->napi_str); |
| if (channel->eventq_read_ptr != |
| read_ptr[channel->channel]) { |
| set_bit(channel->channel, &napi_ran); |
| clear_bit(channel->channel, &dma_pend); |
| clear_bit(channel->channel, &int_pend); |
| } else { |
| if (efx_nic_event_present(channel)) |
| clear_bit(channel->channel, &dma_pend); |
| if (efx_nic_event_test_irq_cpu(channel) >= 0) |
| clear_bit(channel->channel, &int_pend); |
| } |
| napi_enable(&channel->napi_str); |
| efx_nic_eventq_read_ack(channel); |
| } |
| |
| wait *= 2; |
| } while ((dma_pend || int_pend) && time_before(jiffies, timeout)); |
| |
| efx_for_each_channel(channel, efx) { |
| bool dma_seen = !test_bit(channel->channel, &dma_pend); |
| bool int_seen = !test_bit(channel->channel, &int_pend); |
| |
| tests->eventq_dma[channel->channel] = dma_seen ? 1 : -1; |
| tests->eventq_int[channel->channel] = int_seen ? 1 : -1; |
| |
| if (dma_seen && int_seen) { |
| netif_dbg(efx, drv, efx->net_dev, |
| "channel %d event queue passed (with%s NAPI)\n", |
| channel->channel, |
| test_bit(channel->channel, &napi_ran) ? |
| "" : "out"); |
| } else { |
| /* Report failure and whether either interrupt or DMA |
| * worked |
| */ |
| netif_err(efx, drv, efx->net_dev, |
| "channel %d timed out waiting for event queue\n", |
| channel->channel); |
| if (int_seen) |
| netif_err(efx, drv, efx->net_dev, |
| "channel %d saw interrupt " |
| "during event queue test\n", |
| channel->channel); |
| if (dma_seen) |
| netif_err(efx, drv, efx->net_dev, |
| "channel %d event was generated, but " |
| "failed to trigger an interrupt\n", |
| channel->channel); |
| } |
| } |
| |
| return (dma_pend || int_pend) ? -ETIMEDOUT : 0; |
| } |
| |
| static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
| unsigned flags) |
| { |
| int rc; |
| |
| if (!efx->phy_op->run_tests) |
| return 0; |
| |
| mutex_lock(&efx->mac_lock); |
| rc = efx->phy_op->run_tests(efx, tests->phy_ext, flags); |
| mutex_unlock(&efx->mac_lock); |
| return rc; |
| } |
| |
| /************************************************************************** |
| * |
| * Loopback testing |
| * NB Only one loopback test can be executing concurrently. |
| * |
| **************************************************************************/ |
| |
| /* Loopback test RX callback |
| * This is called for each received packet during loopback testing. |
| */ |
| void efx_loopback_rx_packet(struct efx_nic *efx, |
| const char *buf_ptr, int pkt_len) |
| { |
| struct efx_loopback_state *state = efx->loopback_selftest; |
| struct efx_loopback_payload *received; |
| struct efx_loopback_payload *payload; |
| |
| BUG_ON(!buf_ptr); |
| |
| /* If we are just flushing, then drop the packet */ |
| if ((state == NULL) || state->flush) |
| return; |
| |
| payload = &state->payload; |
| |
| received = (struct efx_loopback_payload *) buf_ptr; |
| received->ip.saddr = payload->ip.saddr; |
| if (state->offload_csum) |
| received->ip.check = payload->ip.check; |
| |
| /* Check that header exists */ |
| if (pkt_len < sizeof(received->header)) { |
| netif_err(efx, drv, efx->net_dev, |
| "saw runt RX packet (length %d) in %s loopback " |
| "test\n", pkt_len, LOOPBACK_MODE(efx)); |
| goto err; |
| } |
| |
| /* Check that the ethernet header exists */ |
| if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { |
| netif_err(efx, drv, efx->net_dev, |
| "saw non-loopback RX packet in %s loopback test\n", |
| LOOPBACK_MODE(efx)); |
| goto err; |
| } |
| |
| /* Check packet length */ |
| if (pkt_len != sizeof(*payload)) { |
| netif_err(efx, drv, efx->net_dev, |
| "saw incorrect RX packet length %d (wanted %d) in " |
| "%s loopback test\n", pkt_len, (int)sizeof(*payload), |
| LOOPBACK_MODE(efx)); |
| goto err; |
| } |
| |
| /* Check that IP header matches */ |
| if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { |
| netif_err(efx, drv, efx->net_dev, |
| "saw corrupted IP header in %s loopback test\n", |
| LOOPBACK_MODE(efx)); |
| goto err; |
| } |
| |
| /* Check that msg and padding matches */ |
| if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { |
| netif_err(efx, drv, efx->net_dev, |
| "saw corrupted RX packet in %s loopback test\n", |
| LOOPBACK_MODE(efx)); |
| goto err; |
| } |
| |
| /* Check that iteration matches */ |
| if (received->iteration != payload->iteration) { |
| netif_err(efx, drv, efx->net_dev, |
| "saw RX packet from iteration %d (wanted %d) in " |
| "%s loopback test\n", ntohs(received->iteration), |
| ntohs(payload->iteration), LOOPBACK_MODE(efx)); |
| goto err; |
| } |
| |
| /* Increase correct RX count */ |
| netif_vdbg(efx, drv, efx->net_dev, |
| "got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); |
| |
| atomic_inc(&state->rx_good); |
| return; |
| |
| err: |
| #ifdef DEBUG |
| if (atomic_read(&state->rx_bad) == 0) { |
| netif_err(efx, drv, efx->net_dev, "received packet:\n"); |
| print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
| buf_ptr, pkt_len, 0); |
| netif_err(efx, drv, efx->net_dev, "expected packet:\n"); |
| print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
| &state->payload, sizeof(state->payload), 0); |
| } |
| #endif |
| atomic_inc(&state->rx_bad); |
| } |
| |
| /* Initialise an efx_selftest_state for a new iteration */ |
| static void efx_iterate_state(struct efx_nic *efx) |
| { |
| struct efx_loopback_state *state = efx->loopback_selftest; |
| struct net_device *net_dev = efx->net_dev; |
| struct efx_loopback_payload *payload = &state->payload; |
| |
| /* Initialise the layerII header */ |
| memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN); |
| memcpy(&payload->header.h_source, &payload_source, ETH_ALEN); |
| payload->header.h_proto = htons(ETH_P_IP); |
| |
| /* saddr set later and used as incrementing count */ |
| payload->ip.daddr = htonl(INADDR_LOOPBACK); |
| payload->ip.ihl = 5; |
| payload->ip.check = (__force __sum16) htons(0xdead); |
| payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); |
| payload->ip.version = IPVERSION; |
| payload->ip.protocol = IPPROTO_UDP; |
| |
| /* Initialise udp header */ |
| payload->udp.source = 0; |
| payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - |
| sizeof(struct iphdr)); |
| payload->udp.check = 0; /* checksum ignored */ |
| |
| /* Fill out payload */ |
| payload->iteration = htons(ntohs(payload->iteration) + 1); |
| memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); |
| |
| /* Fill out remaining state members */ |
| atomic_set(&state->rx_good, 0); |
| atomic_set(&state->rx_bad, 0); |
| smp_wmb(); |
| } |
| |
| static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
| { |
| struct efx_nic *efx = tx_queue->efx; |
| struct efx_loopback_state *state = efx->loopback_selftest; |
| struct efx_loopback_payload *payload; |
| struct sk_buff *skb; |
| int i; |
| netdev_tx_t rc; |
| |
| /* Transmit N copies of buffer */ |
| for (i = 0; i < state->packet_count; i++) { |
| /* Allocate an skb, holding an extra reference for |
| * transmit completion counting */ |
| skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); |
| if (!skb) |
| return -ENOMEM; |
| state->skbs[i] = skb; |
| skb_get(skb); |
| |
| /* Copy the payload in, incrementing the source address to |
| * exercise the rss vectors */ |
| payload = ((struct efx_loopback_payload *) |
| skb_put(skb, sizeof(state->payload))); |
| memcpy(payload, &state->payload, sizeof(state->payload)); |
| payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); |
| |
| /* Ensure everything we've written is visible to the |
| * interrupt handler. */ |
| smp_wmb(); |
| |
| netif_tx_lock_bh(efx->net_dev); |
| rc = efx_enqueue_skb(tx_queue, skb); |
| netif_tx_unlock_bh(efx->net_dev); |
| |
| if (rc != NETDEV_TX_OK) { |
| netif_err(efx, drv, efx->net_dev, |
| "TX queue %d could not transmit packet %d of " |
| "%d in %s loopback test\n", tx_queue->queue, |
| i + 1, state->packet_count, |
| LOOPBACK_MODE(efx)); |
| |
| /* Defer cleaning up the other skbs for the caller */ |
| kfree_skb(skb); |
| return -EPIPE; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int efx_poll_loopback(struct efx_nic *efx) |
| { |
| struct efx_loopback_state *state = efx->loopback_selftest; |
| |
| return atomic_read(&state->rx_good) == state->packet_count; |
| } |
| |
| static int efx_end_loopback(struct efx_tx_queue *tx_queue, |
| struct efx_loopback_self_tests *lb_tests) |
| { |
| struct efx_nic *efx = tx_queue->efx; |
| struct efx_loopback_state *state = efx->loopback_selftest; |
| struct sk_buff *skb; |
| int tx_done = 0, rx_good, rx_bad; |
| int i, rc = 0; |
| |
| netif_tx_lock_bh(efx->net_dev); |
| |
| /* Count the number of tx completions, and decrement the refcnt. Any |
| * skbs not already completed will be free'd when the queue is flushed */ |
| for (i = 0; i < state->packet_count; i++) { |
| skb = state->skbs[i]; |
| if (skb && !skb_shared(skb)) |
| ++tx_done; |
| dev_kfree_skb(skb); |
| } |
| |
| netif_tx_unlock_bh(efx->net_dev); |
| |
| /* Check TX completion and received packet counts */ |
| rx_good = atomic_read(&state->rx_good); |
| rx_bad = atomic_read(&state->rx_bad); |
| if (tx_done != state->packet_count) { |
| /* Don't free the skbs; they will be picked up on TX |
| * overflow or channel teardown. |
| */ |
| netif_err(efx, drv, efx->net_dev, |
| "TX queue %d saw only %d out of an expected %d " |
| "TX completion events in %s loopback test\n", |
| tx_queue->queue, tx_done, state->packet_count, |
| LOOPBACK_MODE(efx)); |
| rc = -ETIMEDOUT; |
| /* Allow to fall through so we see the RX errors as well */ |
| } |
| |
| /* We may always be up to a flush away from our desired packet total */ |
| if (rx_good != state->packet_count) { |
| netif_dbg(efx, drv, efx->net_dev, |
| "TX queue %d saw only %d out of an expected %d " |
| "received packets in %s loopback test\n", |
| tx_queue->queue, rx_good, state->packet_count, |
| LOOPBACK_MODE(efx)); |
| rc = -ETIMEDOUT; |
| /* Fall through */ |
| } |
| |
| /* Update loopback test structure */ |
| lb_tests->tx_sent[tx_queue->queue] += state->packet_count; |
| lb_tests->tx_done[tx_queue->queue] += tx_done; |
| lb_tests->rx_good += rx_good; |
| lb_tests->rx_bad += rx_bad; |
| |
| return rc; |
| } |
| |
| static int |
| efx_test_loopback(struct efx_tx_queue *tx_queue, |
| struct efx_loopback_self_tests *lb_tests) |
| { |
| struct efx_nic *efx = tx_queue->efx; |
| struct efx_loopback_state *state = efx->loopback_selftest; |
| int i, begin_rc, end_rc; |
| |
| for (i = 0; i < 3; i++) { |
| /* Determine how many packets to send */ |
| state->packet_count = efx->txq_entries / 3; |
| state->packet_count = min(1 << (i << 2), state->packet_count); |
| state->skbs = kcalloc(state->packet_count, |
| sizeof(state->skbs[0]), GFP_KERNEL); |
| if (!state->skbs) |
| return -ENOMEM; |
| state->flush = false; |
| |
| netif_dbg(efx, drv, efx->net_dev, |
| "TX queue %d testing %s loopback with %d packets\n", |
| tx_queue->queue, LOOPBACK_MODE(efx), |
| state->packet_count); |
| |
| efx_iterate_state(efx); |
| begin_rc = efx_begin_loopback(tx_queue); |
| |
| /* This will normally complete very quickly, but be |
| * prepared to wait much longer. */ |
| msleep(1); |
| if (!efx_poll_loopback(efx)) { |
| msleep(LOOPBACK_TIMEOUT_MS); |
| efx_poll_loopback(efx); |
| } |
| |
| end_rc = efx_end_loopback(tx_queue, lb_tests); |
| kfree(state->skbs); |
| |
| if (begin_rc || end_rc) { |
| /* Wait a while to ensure there are no packets |
| * floating around after a failure. */ |
| schedule_timeout_uninterruptible(HZ / 10); |
| return begin_rc ? begin_rc : end_rc; |
| } |
| } |
| |
| netif_dbg(efx, drv, efx->net_dev, |
| "TX queue %d passed %s loopback test with a burst length " |
| "of %d packets\n", tx_queue->queue, LOOPBACK_MODE(efx), |
| state->packet_count); |
| |
| return 0; |
| } |
| |
| /* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
| * any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it |
| * to delay and retry. Therefore, it's safer to just poll directly. Wait |
| * for link up and any faults to dissipate. */ |
| static int efx_wait_for_link(struct efx_nic *efx) |
| { |
| struct efx_link_state *link_state = &efx->link_state; |
| int count, link_up_count = 0; |
| bool link_up; |
| |
| for (count = 0; count < 40; count++) { |
| schedule_timeout_uninterruptible(HZ / 10); |
| |
| if (efx->type->monitor != NULL) { |
| mutex_lock(&efx->mac_lock); |
| efx->type->monitor(efx); |
| mutex_unlock(&efx->mac_lock); |
| } |
| |
| mutex_lock(&efx->mac_lock); |
| link_up = link_state->up; |
| if (link_up) |
| link_up = !efx->type->check_mac_fault(efx); |
| mutex_unlock(&efx->mac_lock); |
| |
| if (link_up) { |
| if (++link_up_count == 2) |
| return 0; |
| } else { |
| link_up_count = 0; |
| } |
| } |
| |
| return -ETIMEDOUT; |
| } |
| |
| static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
| unsigned int loopback_modes) |
| { |
| enum efx_loopback_mode mode; |
| struct efx_loopback_state *state; |
| struct efx_channel *channel = |
| efx_get_channel(efx, efx->tx_channel_offset); |
| struct efx_tx_queue *tx_queue; |
| int rc = 0; |
| |
| /* Set the port loopback_selftest member. From this point on |
| * all received packets will be dropped. Mark the state as |
| * "flushing" so all inflight packets are dropped */ |
| state = kzalloc(sizeof(*state), GFP_KERNEL); |
| if (state == NULL) |
| return -ENOMEM; |
| BUG_ON(efx->loopback_selftest); |
| state->flush = true; |
| efx->loopback_selftest = state; |
| |
| /* Test all supported loopback modes */ |
| for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
| if (!(loopback_modes & (1 << mode))) |
| continue; |
| |
| /* Move the port into the specified loopback mode. */ |
| state->flush = true; |
| mutex_lock(&efx->mac_lock); |
| efx->loopback_mode = mode; |
| rc = __efx_reconfigure_port(efx); |
| mutex_unlock(&efx->mac_lock); |
| if (rc) { |
| netif_err(efx, drv, efx->net_dev, |
| "unable to move into %s loopback\n", |
| LOOPBACK_MODE(efx)); |
| goto out; |
| } |
| |
| rc = efx_wait_for_link(efx); |
| if (rc) { |
| netif_err(efx, drv, efx->net_dev, |
| "loopback %s never came up\n", |
| LOOPBACK_MODE(efx)); |
| goto out; |
| } |
| |
| /* Test all enabled types of TX queue */ |
| efx_for_each_channel_tx_queue(tx_queue, channel) { |
| state->offload_csum = (tx_queue->queue & |
| EFX_TXQ_TYPE_OFFLOAD); |
| rc = efx_test_loopback(tx_queue, |
| &tests->loopback[mode]); |
| if (rc) |
| goto out; |
| } |
| } |
| |
| out: |
| /* Remove the flush. The caller will remove the loopback setting */ |
| state->flush = true; |
| efx->loopback_selftest = NULL; |
| wmb(); |
| kfree(state); |
| |
| return rc; |
| } |
| |
| /************************************************************************** |
| * |
| * Entry point |
| * |
| *************************************************************************/ |
| |
| int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
| unsigned flags) |
| { |
| enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
| int phy_mode = efx->phy_mode; |
| int rc_test = 0, rc_reset, rc; |
| |
| efx_selftest_async_cancel(efx); |
| |
| /* Online (i.e. non-disruptive) testing |
| * This checks interrupt generation, event delivery and PHY presence. */ |
| |
| rc = efx_test_phy_alive(efx, tests); |
| if (rc && !rc_test) |
| rc_test = rc; |
| |
| rc = efx_test_nvram(efx, tests); |
| if (rc && !rc_test) |
| rc_test = rc; |
| |
| rc = efx_test_interrupts(efx, tests); |
| if (rc && !rc_test) |
| rc_test = rc; |
| |
| rc = efx_test_eventq_irq(efx, tests); |
| if (rc && !rc_test) |
| rc_test = rc; |
| |
| if (rc_test) |
| return rc_test; |
| |
| if (!(flags & ETH_TEST_FL_OFFLINE)) |
| return efx_test_phy(efx, tests, flags); |
| |
| /* Offline (i.e. disruptive) testing |
| * This checks MAC and PHY loopback on the specified port. */ |
| |
| /* Detach the device so the kernel doesn't transmit during the |
| * loopback test and the watchdog timeout doesn't fire. |
| */ |
| efx_device_detach_sync(efx); |
| |
| if (efx->type->test_chip) { |
| rc_reset = efx->type->test_chip(efx, tests); |
| if (rc_reset) { |
| netif_err(efx, hw, efx->net_dev, |
| "Unable to recover from chip test\n"); |
| efx_schedule_reset(efx, RESET_TYPE_DISABLE); |
| return rc_reset; |
| } |
| |
| if ((tests->registers < 0) && !rc_test) |
| rc_test = -EIO; |
| } |
| |
| /* Ensure that the phy is powered and out of loopback |
| * for the bist and loopback tests */ |
| mutex_lock(&efx->mac_lock); |
| efx->phy_mode &= ~PHY_MODE_LOW_POWER; |
| efx->loopback_mode = LOOPBACK_NONE; |
| __efx_reconfigure_port(efx); |
| mutex_unlock(&efx->mac_lock); |
| |
| rc = efx_test_phy(efx, tests, flags); |
| if (rc && !rc_test) |
| rc_test = rc; |
| |
| rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
| if (rc && !rc_test) |
| rc_test = rc; |
| |
| /* restore the PHY to the previous state */ |
| mutex_lock(&efx->mac_lock); |
| efx->phy_mode = phy_mode; |
| efx->loopback_mode = loopback_mode; |
| __efx_reconfigure_port(efx); |
| mutex_unlock(&efx->mac_lock); |
| |
| netif_device_attach(efx->net_dev); |
| |
| return rc_test; |
| } |
| |
| void efx_selftest_async_start(struct efx_nic *efx) |
| { |
| struct efx_channel *channel; |
| |
| efx_for_each_channel(channel, efx) |
| efx_nic_event_test_start(channel); |
| schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT); |
| } |
| |
| void efx_selftest_async_cancel(struct efx_nic *efx) |
| { |
| cancel_delayed_work_sync(&efx->selftest_work); |
| } |
| |
| void efx_selftest_async_work(struct work_struct *data) |
| { |
| struct efx_nic *efx = container_of(data, struct efx_nic, |
| selftest_work.work); |
| struct efx_channel *channel; |
| int cpu; |
| |
| efx_for_each_channel(channel, efx) { |
| cpu = efx_nic_event_test_irq_cpu(channel); |
| if (cpu < 0) |
| netif_err(efx, ifup, efx->net_dev, |
| "channel %d failed to trigger an interrupt\n", |
| channel->channel); |
| else |
| netif_dbg(efx, ifup, efx->net_dev, |
| "channel %d triggered interrupt on CPU %d\n", |
| channel->channel, cpu); |
| } |
| } |