summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/sfc/selftest.c
diff options
context:
space:
mode:
authorJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-05-13 00:17:42 -0700
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-08-11 02:33:50 -0700
commit874aeea5d01cac55c160a4e503e3ddb4db030de7 (patch)
tree2ec67fc737ebc853d954b914a70098ece1ded19b /drivers/net/ethernet/sfc/selftest.c
parente689cf4a042772f727450035b102579b0c01bdc7 (diff)
downloadlinux-874aeea5d01cac55c160a4e503e3ddb4db030de7.tar.bz2
sfc: Move the Solarflare drivers
Moves the Solarflare drivers into drivers/net/ethernet/sfc/ and make the necessary Kconfig and Makefile changes. CC: Steve Hodgson <shodgson@solarflare.com> CC: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/sfc/selftest.c')
-rw-r--r--drivers/net/ethernet/sfc/selftest.c761
1 files changed, 761 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/selftest.c b/drivers/net/ethernet/sfc/selftest.c
new file mode 100644
index 000000000000..822f6c2a6a7c
--- /dev/null
+++ b/drivers/net/ethernet/sfc/selftest.c
@@ -0,0 +1,761 @@
+/****************************************************************************
+ * 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 <asm/io.h>
+#include "net_driver.h"
+#include "efx.h"
+#include "nic.h"
+#include "selftest.h"
+#include "workarounds.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];
+} __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 *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;
+};
+
+/**************************************************************************
+ *
+ * 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;
+}
+
+static int efx_test_chip(struct efx_nic *efx, struct efx_self_tests *tests)
+{
+ int rc = 0;
+
+ /* Test register access */
+ if (efx->type->test_registers) {
+ rc = efx->type->test_registers(efx);
+ tests->registers = 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)
+{
+ netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n");
+ tests->interrupt = -1;
+
+ /* Reset interrupt flag */
+ efx->last_irq_cpu = -1;
+ smp_wmb();
+
+ efx_nic_generate_interrupt(efx);
+
+ /* Wait for arrival of test interrupt. */
+ netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n");
+ schedule_timeout_uninterruptible(HZ / 10);
+ if (efx->last_irq_cpu >= 0)
+ goto success;
+
+ 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),
+ efx->last_irq_cpu);
+ tests->interrupt = 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)
+{
+ struct efx_nic *efx = channel->efx;
+ unsigned int read_ptr, count;
+
+ tests->eventq_dma[channel->channel] = -1;
+ tests->eventq_int[channel->channel] = -1;
+ tests->eventq_poll[channel->channel] = -1;
+
+ read_ptr = channel->eventq_read_ptr;
+ channel->efx->last_irq_cpu = -1;
+ smp_wmb();
+
+ efx_nic_generate_test_event(channel);
+
+ /* Wait for arrival of interrupt */
+ count = 0;
+ do {
+ schedule_timeout_uninterruptible(HZ / 100);
+
+ if (ACCESS_ONCE(channel->eventq_read_ptr) != read_ptr)
+ goto eventq_ok;
+ } while (++count < 2);
+
+ netif_err(efx, drv, efx->net_dev,
+ "channel %d timed out waiting for event queue\n",
+ channel->channel);
+
+ /* See if interrupt arrived */
+ if (channel->efx->last_irq_cpu >= 0) {
+ netif_err(efx, drv, efx->net_dev,
+ "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 */
+ if (efx_nic_event_present(channel)) {
+ netif_err(efx, drv, efx->net_dev,
+ "channel %d event was generated, but "
+ "failed to trigger an interrupt\n", channel->channel);
+ tests->eventq_dma[channel->channel] = 1;
+ }
+
+ return -ETIMEDOUT;
+ eventq_ok:
+ netif_dbg(efx, drv, efx->net_dev, "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;
+}
+
+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 EFX_ENABLE_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 = 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();
+
+ if (efx_dev_registered(efx))
+ netif_tx_lock_bh(efx->net_dev);
+ rc = efx_enqueue_skb(tx_queue, skb);
+ if (efx_dev_registered(efx))
+ 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;
+ struct efx_channel *channel;
+
+ /* NAPI polling is not enabled, so process channels
+ * synchronously */
+ efx_for_each_channel(channel, efx) {
+ if (channel->work_pending)
+ efx_process_channel_now(channel);
+ }
+ 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;
+
+ 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.
+ */
+ 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 = kzalloc(sizeof(state->skbs[0]) *
+ state->packet_count, 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 up to 100 ms. */
+ msleep(1);
+ if (!efx_poll_loopback(efx)) {
+ msleep(100);
+ 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);
+ } else {
+ struct efx_channel *channel = efx_get_channel(efx, 0);
+ if (channel->work_pending)
+ efx_process_channel_now(channel);
+ }
+
+ mutex_lock(&efx->mac_lock);
+ link_up = link_state->up;
+ if (link_up)
+ link_up = !efx->mac_op->check_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, 0);
+ 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;
+ enum reset_type reset_method = RESET_TYPE_INVISIBLE;
+ struct efx_channel *channel;
+ int rc_test = 0, rc_reset = 0, rc;
+
+ /* 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;
+
+ efx_for_each_channel(channel, efx) {
+ rc = efx_test_eventq_irq(channel, 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.
+ */
+ netif_device_detach(efx->net_dev);
+
+ mutex_lock(&efx->mac_lock);
+ if (efx->loopback_modes) {
+ /* We need the 312 clock from the PHY to test the XMAC
+ * registers, so move into XGMII loopback if available */
+ if (efx->loopback_modes & (1 << LOOPBACK_XGMII))
+ efx->loopback_mode = LOOPBACK_XGMII;
+ else
+ efx->loopback_mode = __ffs(efx->loopback_modes);
+ }
+
+ __efx_reconfigure_port(efx);
+ mutex_unlock(&efx->mac_lock);
+
+ /* free up all consumers of SRAM (including all the queues) */
+ efx_reset_down(efx, reset_method);
+
+ rc = efx_test_chip(efx, tests);
+ if (rc && !rc_test)
+ rc_test = rc;
+
+ /* reset the chip to recover from the register test */
+ rc_reset = efx->type->reset(efx, reset_method);
+
+ /* Ensure that the phy is powered and out of loopback
+ * for the bist and loopback tests */
+ efx->phy_mode &= ~PHY_MODE_LOW_POWER;
+ efx->loopback_mode = LOOPBACK_NONE;
+
+ rc = efx_reset_up(efx, reset_method, rc_reset == 0);
+ if (rc && !rc_reset)
+ rc_reset = rc;
+
+ if (rc_reset) {
+ netif_err(efx, drv, efx->net_dev,
+ "Unable to recover from chip test\n");
+ efx_schedule_reset(efx, RESET_TYPE_DISABLE);
+ return rc_reset;
+ }
+
+ 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;
+}
+