[netdrvr] sfc: sfc: Add self-test support

Add a set of self-tests accessible thorugh ethtool.
Add hardware loopback and TX disable control code to support them.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 717 insertions, 0 deletions

diff --git a/drivers/net/sfc/selftest.c b/drivers/net/sfc/selftest.c
new file mode 100644
index 00000000000..cbda15946e8
--- /dev/null
+++ b/drivers/net/sfc/selftest.c
@@ -0,0 +1,717 @@
+/****************************************************************************
+ * 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 *)(char *) 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 (NET_DEV_REGISTERED(efx))
+			netif_tx_lock_bh(efx->net_dev);
+		rc = efx_xmit(efx, tx_queue, skb);
+		if (NET_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 (NET_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 (NET_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);
+		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 = (void *)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;
+}
+