![Ben Hutchings](/assets/img/avatar_default.png)
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
720 lines
20 KiB
C
720 lines
20 KiB
C
/****************************************************************************
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* Driver for Solarflare Solarstorm network controllers and boards
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* Copyright 2005-2006 Fen Systems Ltd.
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* Copyright 2006-2008 Solarflare Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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#include <linux/netdevice.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/kernel_stat.h>
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#include <linux/pci.h>
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#include <linux/ethtool.h>
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#include <linux/ip.h>
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#include <linux/in.h>
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#include <linux/udp.h>
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#include <linux/rtnetlink.h>
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#include <asm/io.h>
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#include "net_driver.h"
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#include "ethtool.h"
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#include "efx.h"
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#include "falcon.h"
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#include "selftest.h"
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#include "boards.h"
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#include "workarounds.h"
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#include "mac.h"
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/*
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* Loopback test packet structure
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*
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* The self-test should stress every RSS vector, and unfortunately
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* Falcon only performs RSS on TCP/UDP packets.
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*/
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struct efx_loopback_payload {
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struct ethhdr header;
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struct iphdr ip;
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struct udphdr udp;
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__be16 iteration;
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const char msg[64];
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} __attribute__ ((packed));
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/* Loopback test source MAC address */
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static const unsigned char payload_source[ETH_ALEN] = {
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0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b,
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};
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static const char *payload_msg =
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"Hello world! This is an Efx loopback test in progress!";
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/**
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* efx_selftest_state - persistent state during a selftest
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* @flush: Drop all packets in efx_loopback_rx_packet
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* @packet_count: Number of packets being used in this test
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* @skbs: An array of skbs transmitted
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* @rx_good: RX good packet count
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* @rx_bad: RX bad packet count
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* @payload: Payload used in tests
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*/
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struct efx_selftest_state {
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int flush;
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int packet_count;
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struct sk_buff **skbs;
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atomic_t rx_good;
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atomic_t rx_bad;
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struct efx_loopback_payload payload;
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};
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/**************************************************************************
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*
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* Configurable values
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*
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**************************************************************************/
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/* Level of loopback testing
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*
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* The maximum packet burst length is 16**(n-1), i.e.
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*
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* - Level 0 : no packets
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* - Level 1 : 1 packet
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* - Level 2 : 17 packets (1 * 1 packet, 1 * 16 packets)
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* - Level 3 : 273 packets (1 * 1 packet, 1 * 16 packet, 1 * 256 packets)
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*
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*/
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static unsigned int loopback_test_level = 3;
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/**************************************************************************
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*
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* Interrupt and event queue testing
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*
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**************************************************************************/
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/* Test generation and receipt of interrupts */
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static int efx_test_interrupts(struct efx_nic *efx,
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struct efx_self_tests *tests)
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{
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struct efx_channel *channel;
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EFX_LOG(efx, "testing interrupts\n");
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tests->interrupt = -1;
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/* Reset interrupt flag */
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efx->last_irq_cpu = -1;
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smp_wmb();
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/* ACK each interrupting event queue. Receiving an interrupt due to
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* traffic before a test event is raised is considered a pass */
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efx_for_each_channel_with_interrupt(channel, efx) {
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if (channel->work_pending)
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efx_process_channel_now(channel);
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if (efx->last_irq_cpu >= 0)
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goto success;
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}
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falcon_generate_interrupt(efx);
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/* Wait for arrival of test interrupt. */
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EFX_LOG(efx, "waiting for test interrupt\n");
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schedule_timeout_uninterruptible(HZ / 10);
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if (efx->last_irq_cpu >= 0)
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goto success;
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EFX_ERR(efx, "timed out waiting for interrupt\n");
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return -ETIMEDOUT;
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success:
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EFX_LOG(efx, "test interrupt (mode %d) seen on CPU%d\n",
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efx->interrupt_mode, efx->last_irq_cpu);
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tests->interrupt = 1;
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return 0;
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}
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/* Test generation and receipt of non-interrupting events */
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static int efx_test_eventq(struct efx_channel *channel,
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struct efx_self_tests *tests)
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{
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unsigned int magic;
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/* Channel specific code, limited to 20 bits */
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magic = (0x00010150 + channel->channel);
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EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n",
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channel->channel, magic);
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tests->eventq_dma[channel->channel] = -1;
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tests->eventq_int[channel->channel] = 1; /* fake pass */
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tests->eventq_poll[channel->channel] = 1; /* fake pass */
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/* Reset flag and zero magic word */
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channel->efx->last_irq_cpu = -1;
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channel->eventq_magic = 0;
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smp_wmb();
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falcon_generate_test_event(channel, magic);
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udelay(1);
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efx_process_channel_now(channel);
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if (channel->eventq_magic != magic) {
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EFX_ERR(channel->efx, "channel %d failed to see test event\n",
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channel->channel);
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return -ETIMEDOUT;
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} else {
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tests->eventq_dma[channel->channel] = 1;
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}
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return 0;
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}
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/* Test generation and receipt of interrupting events */
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static int efx_test_eventq_irq(struct efx_channel *channel,
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struct efx_self_tests *tests)
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{
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unsigned int magic, count;
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/* Channel specific code, limited to 20 bits */
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magic = (0x00010150 + channel->channel);
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EFX_LOG(channel->efx, "channel %d testing event queue with code %x\n",
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channel->channel, magic);
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tests->eventq_dma[channel->channel] = -1;
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tests->eventq_int[channel->channel] = -1;
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tests->eventq_poll[channel->channel] = -1;
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/* Reset flag and zero magic word */
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channel->efx->last_irq_cpu = -1;
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channel->eventq_magic = 0;
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smp_wmb();
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falcon_generate_test_event(channel, magic);
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/* Wait for arrival of interrupt */
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count = 0;
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do {
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schedule_timeout_uninterruptible(HZ / 100);
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if (channel->work_pending)
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efx_process_channel_now(channel);
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if (channel->eventq_magic == magic)
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goto eventq_ok;
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} while (++count < 2);
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EFX_ERR(channel->efx, "channel %d timed out waiting for event queue\n",
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channel->channel);
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/* See if interrupt arrived */
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if (channel->efx->last_irq_cpu >= 0) {
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EFX_ERR(channel->efx, "channel %d saw interrupt on CPU%d "
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"during event queue test\n", channel->channel,
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raw_smp_processor_id());
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tests->eventq_int[channel->channel] = 1;
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}
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/* Check to see if event was received even if interrupt wasn't */
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efx_process_channel_now(channel);
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if (channel->eventq_magic == magic) {
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EFX_ERR(channel->efx, "channel %d event was generated, but "
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"failed to trigger an interrupt\n", channel->channel);
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tests->eventq_dma[channel->channel] = 1;
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}
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return -ETIMEDOUT;
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eventq_ok:
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EFX_LOG(channel->efx, "channel %d event queue passed\n",
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channel->channel);
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tests->eventq_dma[channel->channel] = 1;
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tests->eventq_int[channel->channel] = 1;
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tests->eventq_poll[channel->channel] = 1;
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return 0;
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}
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/**************************************************************************
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*
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* PHY testing
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*
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**************************************************************************/
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/* Check PHY presence by reading the PHY ID registers */
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static int efx_test_phy(struct efx_nic *efx,
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struct efx_self_tests *tests)
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{
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u16 physid1, physid2;
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struct mii_if_info *mii = &efx->mii;
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struct net_device *net_dev = efx->net_dev;
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if (efx->phy_type == PHY_TYPE_NONE)
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return 0;
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EFX_LOG(efx, "testing PHY presence\n");
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tests->phy_ok = -1;
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physid1 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID1);
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physid2 = mii->mdio_read(net_dev, mii->phy_id, MII_PHYSID2);
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if ((physid1 != 0x0000) && (physid1 != 0xffff) &&
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(physid2 != 0x0000) && (physid2 != 0xffff)) {
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EFX_LOG(efx, "found MII PHY %d ID 0x%x:%x\n",
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mii->phy_id, physid1, physid2);
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tests->phy_ok = 1;
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return 0;
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}
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EFX_ERR(efx, "no MII PHY present with ID %d\n", mii->phy_id);
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return -ENODEV;
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}
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/**************************************************************************
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*
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* Loopback testing
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* NB Only one loopback test can be executing concurrently.
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*
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**************************************************************************/
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/* Loopback test RX callback
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* This is called for each received packet during loopback testing.
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*/
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void efx_loopback_rx_packet(struct efx_nic *efx,
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const char *buf_ptr, int pkt_len)
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{
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struct efx_selftest_state *state = efx->loopback_selftest;
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struct efx_loopback_payload *received;
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struct efx_loopback_payload *payload;
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BUG_ON(!buf_ptr);
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/* If we are just flushing, then drop the packet */
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if ((state == NULL) || state->flush)
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return;
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payload = &state->payload;
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received = (struct efx_loopback_payload *) buf_ptr;
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received->ip.saddr = payload->ip.saddr;
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received->ip.check = payload->ip.check;
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/* Check that header exists */
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if (pkt_len < sizeof(received->header)) {
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EFX_ERR(efx, "saw runt RX packet (length %d) in %s loopback "
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"test\n", pkt_len, LOOPBACK_MODE(efx));
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goto err;
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}
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/* Check that the ethernet header exists */
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if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) {
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EFX_ERR(efx, "saw non-loopback RX packet in %s loopback test\n",
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LOOPBACK_MODE(efx));
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goto err;
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}
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/* Check packet length */
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if (pkt_len != sizeof(*payload)) {
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EFX_ERR(efx, "saw incorrect RX packet length %d (wanted %d) in "
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"%s loopback test\n", pkt_len, (int)sizeof(*payload),
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LOOPBACK_MODE(efx));
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goto err;
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}
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/* Check that IP header matches */
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if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) {
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EFX_ERR(efx, "saw corrupted IP header in %s loopback test\n",
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LOOPBACK_MODE(efx));
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goto err;
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}
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/* Check that msg and padding matches */
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if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) {
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EFX_ERR(efx, "saw corrupted RX packet in %s loopback test\n",
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LOOPBACK_MODE(efx));
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goto err;
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}
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/* Check that iteration matches */
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if (received->iteration != payload->iteration) {
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EFX_ERR(efx, "saw RX packet from iteration %d (wanted %d) in "
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"%s loopback test\n", ntohs(received->iteration),
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ntohs(payload->iteration), LOOPBACK_MODE(efx));
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goto err;
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}
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/* Increase correct RX count */
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EFX_TRACE(efx, "got loopback RX in %s loopback test\n",
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LOOPBACK_MODE(efx));
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atomic_inc(&state->rx_good);
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return;
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err:
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#ifdef EFX_ENABLE_DEBUG
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if (atomic_read(&state->rx_bad) == 0) {
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EFX_ERR(efx, "received packet:\n");
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print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
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buf_ptr, pkt_len, 0);
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EFX_ERR(efx, "expected packet:\n");
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print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1,
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&state->payload, sizeof(state->payload), 0);
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}
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#endif
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atomic_inc(&state->rx_bad);
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}
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/* Initialise an efx_selftest_state for a new iteration */
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static void efx_iterate_state(struct efx_nic *efx)
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{
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struct efx_selftest_state *state = efx->loopback_selftest;
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struct net_device *net_dev = efx->net_dev;
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struct efx_loopback_payload *payload = &state->payload;
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/* Initialise the layerII header */
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memcpy(&payload->header.h_dest, net_dev->dev_addr, ETH_ALEN);
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memcpy(&payload->header.h_source, &payload_source, ETH_ALEN);
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payload->header.h_proto = htons(ETH_P_IP);
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/* saddr set later and used as incrementing count */
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payload->ip.daddr = htonl(INADDR_LOOPBACK);
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payload->ip.ihl = 5;
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payload->ip.check = htons(0xdead);
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payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr));
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payload->ip.version = IPVERSION;
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payload->ip.protocol = IPPROTO_UDP;
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/* Initialise udp header */
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payload->udp.source = 0;
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payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) -
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sizeof(struct iphdr));
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payload->udp.check = 0; /* checksum ignored */
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/* Fill out payload */
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payload->iteration = htons(ntohs(payload->iteration) + 1);
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memcpy(&payload->msg, payload_msg, sizeof(payload_msg));
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/* Fill out remaining state members */
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atomic_set(&state->rx_good, 0);
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atomic_set(&state->rx_bad, 0);
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smp_wmb();
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}
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static int efx_tx_loopback(struct efx_tx_queue *tx_queue)
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{
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struct efx_nic *efx = tx_queue->efx;
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struct efx_selftest_state *state = efx->loopback_selftest;
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struct efx_loopback_payload *payload;
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struct sk_buff *skb;
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int i, rc;
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/* Transmit N copies of buffer */
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for (i = 0; i < state->packet_count; i++) {
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/* Allocate an skb, holding an extra reference for
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* transmit completion counting */
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skb = alloc_skb(sizeof(state->payload), GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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state->skbs[i] = skb;
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skb_get(skb);
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/* Copy the payload in, incrementing the source address to
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* exercise the rss vectors */
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payload = ((struct efx_loopback_payload *)
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skb_put(skb, sizeof(state->payload)));
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memcpy(payload, &state->payload, sizeof(state->payload));
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payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2));
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/* Ensure everything we've written is visible to the
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* interrupt handler. */
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smp_wmb();
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if (efx_dev_registered(efx))
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netif_tx_lock_bh(efx->net_dev);
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rc = efx_xmit(efx, tx_queue, skb);
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if (efx_dev_registered(efx))
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netif_tx_unlock_bh(efx->net_dev);
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if (rc != NETDEV_TX_OK) {
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EFX_ERR(efx, "TX queue %d could not transmit packet %d "
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"of %d in %s loopback test\n", tx_queue->queue,
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i + 1, state->packet_count, LOOPBACK_MODE(efx));
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/* Defer cleaning up the other skbs for the caller */
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kfree_skb(skb);
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return -EPIPE;
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}
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}
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return 0;
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}
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static int efx_rx_loopback(struct efx_tx_queue *tx_queue,
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struct efx_loopback_self_tests *lb_tests)
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{
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struct efx_nic *efx = tx_queue->efx;
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struct efx_selftest_state *state = efx->loopback_selftest;
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struct sk_buff *skb;
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int tx_done = 0, rx_good, rx_bad;
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int i, rc = 0;
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if (efx_dev_registered(efx))
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netif_tx_lock_bh(efx->net_dev);
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/* Count the number of tx completions, and decrement the refcnt. Any
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* skbs not already completed will be free'd when the queue is flushed */
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for (i=0; i < state->packet_count; i++) {
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skb = state->skbs[i];
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if (skb && !skb_shared(skb))
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++tx_done;
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dev_kfree_skb_any(skb);
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}
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if (efx_dev_registered(efx))
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netif_tx_unlock_bh(efx->net_dev);
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/* Check TX completion and received packet counts */
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rx_good = atomic_read(&state->rx_good);
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rx_bad = atomic_read(&state->rx_bad);
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if (tx_done != state->packet_count) {
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/* Don't free the skbs; they will be picked up on TX
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* overflow or channel teardown.
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*/
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EFX_ERR(efx, "TX queue %d saw only %d out of an expected %d "
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"TX completion events in %s loopback test\n",
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tx_queue->queue, tx_done, state->packet_count,
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LOOPBACK_MODE(efx));
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rc = -ETIMEDOUT;
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/* Allow to fall through so we see the RX errors as well */
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}
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/* We may always be up to a flush away from our desired packet total */
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if (rx_good != state->packet_count) {
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EFX_LOG(efx, "TX queue %d saw only %d out of an expected %d "
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"received packets in %s loopback test\n",
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tx_queue->queue, rx_good, state->packet_count,
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LOOPBACK_MODE(efx));
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rc = -ETIMEDOUT;
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/* Fall through */
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}
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|
|
/* 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;
|
|
}
|
|
|