diff options
Diffstat (limited to 'drivers/net/sfc/selftest.c')
| -rw-r--r-- | drivers/net/sfc/selftest.c | 719 |
1 files changed, 0 insertions, 719 deletions
diff --git a/drivers/net/sfc/selftest.c b/drivers/net/sfc/selftest.c deleted file mode 100644 index 3b2de9fe7f2..00000000000 --- a/drivers/net/sfc/selftest.c +++ /dev/null @@ -1,719 +0,0 @@ -/**************************************************************************** - * Driver for Solarflare Solarstorm network controllers and boards - * Copyright 2005-2006 Fen Systems Ltd. - * Copyright 2006-2008 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 <asm/io.h> -#include "net_driver.h" -#include "ethtool.h" -#include "efx.h" -#include "falcon.h" -#include "selftest.h" -#include "boards.h" -#include "workarounds.h" -#include "mac.h" - -/* - * 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]; -} __attribute__ ((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!"; - -/** - * efx_selftest_state - persistent state during a 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 - * @rx_good: RX good packet count - * @rx_bad: RX bad packet count - * @payload: Payload used in tests - */ -struct efx_selftest_state { - int flush; - int packet_count; - struct sk_buff **skbs; - atomic_t rx_good; - atomic_t rx_bad; - struct efx_loopback_payload payload; -}; - -/************************************************************************** - * - * Configurable values - * - **************************************************************************/ - -/* Level of loopback testing - * - * The maximum packet burst length is 16**(n-1), i.e. - * - * - Level 0 : no packets - * - Level 1 : 1 packet - * - Level 2 : 17 packets (1 * 1 packet, 1 * 16 packets) - * - Level 3 : 273 packets (1 * 1 packet, 1 * 16 packet, 1 * 256 packets) - * - */ -static unsigned int loopback_test_level = 3; - -/************************************************************************** - * - * 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) -{ - struct efx_channel *channel; - - EFX_LOG(efx, "testing interrupts\n"); - tests->interrupt = -1; - - /* Reset interrupt flag */ - efx->last_irq_cpu = -1; - smp_wmb(); - - /* ACK each interrupting event queue. Receiving an interrupt due to - * traffic before a test event is raised is considered a pass */ - efx_for_each_channel_with_interrupt(channel, efx) { - if (channel->work_pending) - efx_process_channel_now(channel); - if (efx->last_irq_cpu >= 0) - goto success; - } - - falcon_generate_interrupt(efx); - - /* Wait for arrival of test interrupt. */ - EFX_LOG(efx, "waiting for test interrupt\n"); - schedule_timeout_uninterruptible(HZ / 10); - if (efx->last_irq_cpu >= 0) - goto success; - - EFX_ERR(efx, "timed out waiting for interrupt\n"); - return -ETIMEDOUT; - - success: - EFX_LOG(efx, "test interrupt (mode %d) seen on CPU%d\n", - efx->interrupt_mode, efx->last_irq_cpu); - tests->interrupt = 1; - return 0; -} - -/* Test generation and receipt of non-interrupting events */ -static int efx_test_eventq(struct efx_channel *channel, - struct efx_self_tests *tests) -{ - unsigned int magic; - - /* Channel specific code, limited to 20 bits */ - magic = (0x00010150 + channel->channel); - EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n", - channel->channel, magic); - - tests->eventq_dma[channel->channel] = -1; - tests->eventq_int[channel->channel] = 1; /* fake pass */ - tests->eventq_poll[channel->channel] = 1; /* fake pass */ - - /* Reset flag and zero magic word */ - channel->efx->last_irq_cpu = -1; - channel->eventq_magic = 0; - smp_wmb(); - - falcon_generate_test_event(channel, magic); - udelay(1); - - efx_process_channel_now(channel); - if (channel->eventq_magic != magic) { - EFX_ERR(channel->efx, "channel %d failed to see test event\n", - channel->channel); - return -ETIMEDOUT; - } else { - tests->eventq_dma[channel->channel] = 1; - } - - return 0; -} - -/* Test generation and receipt of interrupting events */ -static int efx_test_eventq_irq(struct efx_channel *channel, - struct efx_self_tests *tests) -{ - unsigned int magic, count; - - /* Channel specific code, limited to 20 bits */ - magic = (0x00010150 + channel->channel); - EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n", - channel->channel, magic); - - tests->eventq_dma[channel->channel] = -1; - tests->eventq_int[channel->channel] = -1; - tests->eventq_poll[channel->channel] = -1; - - /* Reset flag and zero magic word */ - channel->efx->last_irq_cpu = -1; - channel->eventq_magic = 0; - smp_wmb(); - - falcon_generate_test_event(channel, magic); - - /* Wait for arrival of interrupt */ - count = 0; - do { - schedule_timeout_uninterruptible(HZ / 100); - - if (channel->work_pending) - efx_process_channel_now(channel); - - if (channel->eventq_magic == magic) - goto eventq_ok; - } while (++count < 2); - - EFX_ERR(channel->efx, "channel %d timed out waiting for event queue\n", - channel->channel); - - /* See if interrupt arrived */ - if (channel->efx->last_irq_cpu >= 0) { - EFX_ERR(channel->efx, "channel %d saw interrupt on CPU%d " - "during event queue test\n", channel->channel, - raw_smp_processor_id()); - tests->eventq_int[channel->channel] = 1; - } - - /* Check to see if event was received even if interrupt wasn't */ - efx_process_channel_now(channel); - if (channel->eventq_magic == magic) { - EFX_ERR(channel->efx, "channel %d event was generated, but " - "failed to trigger an interrupt\n", channel->channel); - tests->eventq_dma[channel->channel] = 1; - } - - return -ETIMEDOUT; - eventq_ok: - EFX_LOG(channel->efx, "channel %d event queue passed\n", - channel->channel); - tests->eventq_dma[channel->channel] = 1; - tests->eventq_int[channel->channel] = 1; - tests->eventq_poll[channel->channel] = 1; - return 0; -} - -/************************************************************************** - * - * PHY testing - * - **************************************************************************/ - -/* Check PHY presence by reading the PHY ID registers */ -static int efx_test_phy(struct efx_nic *efx, - struct efx_self_tests *tests) -{ - u16 physid1, physid2; - struct mii_if_info *mii = &efx->mii; - struct net_device *net_dev = efx->net_dev; - - if (efx->phy_type == PHY_TYPE_NONE) - return 0; - - EFX_LOG(efx, "testing PHY presence\n"); - tests->phy_ok = -1; - - physid1 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID1); - physid2 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID2); - - if ((physid1 != 0x0000) && (physid1 != 0xffff) && - (physid2 != 0x0000) && (physid2 != 0xffff)) { - EFX_LOG(efx, "found MII PHY %d ID 0x%x:%x\n", - mii->phy_id, physid1, physid2); - tests->phy_ok = 1; - return 0; - } - - EFX_ERR(efx, "no MII PHY present with ID %d\n", mii->phy_id); - return -ENODEV; -} - -/************************************************************************** - * - * 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_selftest_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; - received->ip.check = payload->ip.check; - - /* Check that header exists */ - if (pkt_len < sizeof(received->header)) { - EFX_ERR(efx, "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) { - EFX_ERR(efx, "saw non-loopback RX packet in %s loopback test\n", - LOOPBACK_MODE(efx)); - goto err; - } - - /* Check packet length */ - if (pkt_len != sizeof(*payload)) { - EFX_ERR(efx, "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) { - EFX_ERR(efx, "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) { - EFX_ERR(efx, "saw corrupted RX packet in %s loopback test\n", - LOOPBACK_MODE(efx)); - goto err; - } - - /* Check that iteration matches */ - if (received->iteration != payload->iteration) { - EFX_ERR(efx, "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 */ - EFX_TRACE(efx, "got loopback RX in %s loopback test\n", - LOOPBACK_MODE(efx)); - - atomic_inc(&state->rx_good); - return; - - err: -#ifdef EFX_ENABLE_DEBUG - if (atomic_read(&state->rx_bad) == 0) { - EFX_ERR(efx, "received packet:\n"); - print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, - buf_ptr, pkt_len, 0); - EFX_ERR(efx, "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_selftest_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 = 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_tx_loopback(struct efx_tx_queue *tx_queue) -{ - struct efx_nic *efx = tx_queue->efx; - struct efx_selftest_state *state = efx->loopback_selftest; - struct efx_loopback_payload *payload; - struct sk_buff *skb; - int i, 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(); - - if (efx_dev_registered(efx)) - netif_tx_lock_bh(efx->net_dev); - rc = efx_xmit(efx, tx_queue, skb); - if (efx_dev_registered(efx)) - netif_tx_unlock_bh(efx->net_dev); - - if (rc != NETDEV_TX_OK) { - EFX_ERR(efx, "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_rx_loopback(struct efx_tx_queue *tx_queue, - struct efx_loopback_self_tests *lb_tests) -{ - struct efx_nic *efx = tx_queue->efx; - struct efx_selftest_state *state = efx->loopback_selftest; - struct sk_buff *skb; - int tx_done = 0, rx_good, rx_bad; - int i, rc = 0; - - if (efx_dev_registered(efx)) - 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_any(skb); - } - - if (efx_dev_registered(efx)) - 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. - */ - EFX_ERR(efx, "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) { - EFX_LOG(efx, "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_selftest_state *state = efx->loopback_selftest; - struct efx_channel *channel; - int i, rc = 0; - - for (i = 0; i < loopback_test_level; i++) { - /* Determine how many packets to send */ - state->packet_count = (efx->type->txd_ring_mask + 1) / 3; - state->packet_count = min(1 << (i << 2), state->packet_count); - state->skbs = kzalloc(sizeof(state->skbs[0]) * - state->packet_count, GFP_KERNEL); - if (!state->skbs) - return -ENOMEM; - state->flush = 0; - - EFX_LOG(efx, "TX queue %d testing %s loopback with %d " - "packets\n", tx_queue->queue, LOOPBACK_MODE(efx), - state->packet_count); - - efx_iterate_state(efx); - rc = efx_tx_loopback(tx_queue); - - /* NAPI polling is not enabled, so process channels synchronously */ - schedule_timeout_uninterruptible(HZ / 50); - efx_for_each_channel_with_interrupt(channel, efx) { - if (channel->work_pending) - efx_process_channel_now(channel); - } - - rc |= efx_rx_loopback(tx_queue, lb_tests); - kfree(state->skbs); - - if (rc) { - /* Wait a while to ensure there are no packets - * floating around after a failure. */ - schedule_timeout_uninterruptible(HZ / 10); - return rc; - } - } - - EFX_LOG(efx, "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 rc; -} - -static int efx_test_loopbacks(struct efx_nic *efx, - struct efx_self_tests *tests, - unsigned int loopback_modes) -{ - struct efx_selftest_state *state = efx->loopback_selftest; - struct ethtool_cmd ecmd, ecmd_loopback; - struct efx_tx_queue *tx_queue; - enum efx_loopback_mode old_mode, mode; - int count, rc = 0, link_up; - - rc = efx_ethtool_get_settings(efx->net_dev, &ecmd); - if (rc) { - EFX_ERR(efx, "could not get GMII settings\n"); - return rc; - } - old_mode = efx->loopback_mode; - - /* Disable autonegotiation for the purposes of loopback */ - memcpy(&ecmd_loopback, &ecmd, sizeof(ecmd_loopback)); - if (ecmd_loopback.autoneg == AUTONEG_ENABLE) { - ecmd_loopback.autoneg = AUTONEG_DISABLE; - ecmd_loopback.duplex = DUPLEX_FULL; - ecmd_loopback.speed = SPEED_10000; - } - - rc = efx_ethtool_set_settings(efx->net_dev, &ecmd_loopback); - if (rc) { - EFX_ERR(efx, "could not disable autonegotiation\n"); - goto out; - } - tests->loopback_speed = ecmd_loopback.speed; - tests->loopback_full_duplex = ecmd_loopback.duplex; - - /* 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 = 1; - efx->loopback_mode = mode; - efx_reconfigure_port(efx); - - /* Wait for the PHY to signal the link is up */ - count = 0; - do { - struct efx_channel *channel = &efx->channel[0]; - - falcon_check_xmac(efx); - schedule_timeout_uninterruptible(HZ / 10); - if (channel->work_pending) - efx_process_channel_now(channel); - /* Wait for PHY events to be processed */ - flush_workqueue(efx->workqueue); - rmb(); - - /* efx->link_up can be 1 even if the XAUI link is down, - * (bug5762). Usually, it's not worth bothering with the - * difference, but for selftests, we need that extra - * guarantee that the link is really, really, up. - */ - link_up = efx->link_up; - if (!falcon_xaui_link_ok(efx)) - link_up = 0; - - } while ((++count < 20) && !link_up); - - /* The link should now be up. If it isn't, there is no point - * in attempting a loopback test */ - if (!link_up) { - EFX_ERR(efx, "loopback %s never came up\n", - LOOPBACK_MODE(efx)); - rc = -EIO; - goto out; - } - - EFX_LOG(efx, "link came up in %s loopback in %d iterations\n", - LOOPBACK_MODE(efx), count); - - /* Test every TX queue */ - efx_for_each_tx_queue(tx_queue, efx) { - rc |= efx_test_loopback(tx_queue, - &tests->loopback[mode]); - if (rc) - goto out; - } - } - - out: - /* Take out of loopback and restore PHY settings */ - state->flush = 1; - efx->loopback_mode = old_mode; - efx_ethtool_set_settings(efx->net_dev, &ecmd); - - return rc; -} - -/************************************************************************** - * - * Entry points - * - *************************************************************************/ - -/* Online (i.e. non-disruptive) testing - * This checks interrupt generation, event delivery and PHY presence. */ -int efx_online_test(struct efx_nic *efx, struct efx_self_tests *tests) -{ - struct efx_channel *channel; - int rc = 0; - - EFX_LOG(efx, "performing online self-tests\n"); - - rc |= efx_test_interrupts(efx, tests); - efx_for_each_channel(channel, efx) { - if (channel->has_interrupt) - rc |= efx_test_eventq_irq(channel, tests); - else - rc |= efx_test_eventq(channel, tests); - } - rc |= efx_test_phy(efx, tests); - - if (rc) - EFX_ERR(efx, "failed online self-tests\n"); - - return rc; -} - -/* Offline (i.e. disruptive) testing - * This checks MAC and PHY loopback on the specified port. */ -int efx_offline_test(struct efx_nic *efx, - struct efx_self_tests *tests, unsigned int loopback_modes) -{ - struct efx_selftest_state *state; - int rc = 0; - - EFX_LOG(efx, "performing offline self-tests\n"); - - /* Create a selftest_state structure to hold state for the test */ - state = kzalloc(sizeof(*state), GFP_KERNEL); - if (state == NULL) { - rc = -ENOMEM; - goto out; - } - - /* 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 */ - BUG_ON(efx->loopback_selftest); - state->flush = 1; - efx->loopback_selftest = state; - - rc = efx_test_loopbacks(efx, tests, loopback_modes); - - efx->loopback_selftest = NULL; - wmb(); - kfree(state); - - out: - if (rc) - EFX_ERR(efx, "failed offline self-tests\n"); - - return rc; -} - |