mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
807 lines
22 KiB
807 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/**************************************************************************** |
|
* Driver for Solarflare network controllers and boards |
|
* Copyright 2005-2006 Fen Systems Ltd. |
|
* Copyright 2006-2012 Solarflare Communications Inc. |
|
*/ |
|
|
|
#include <linux/netdevice.h> |
|
#include <linux/module.h> |
|
#include <linux/delay.h> |
|
#include <linux/kernel_stat.h> |
|
#include <linux/pci.h> |
|
#include <linux/ethtool.h> |
|
#include <linux/ip.h> |
|
#include <linux/in.h> |
|
#include <linux/udp.h> |
|
#include <linux/rtnetlink.h> |
|
#include <linux/slab.h> |
|
#include "net_driver.h" |
|
#include "efx.h" |
|
#include "efx_common.h" |
|
#include "efx_channels.h" |
|
#include "nic.h" |
|
#include "mcdi_port_common.h" |
|
#include "selftest.h" |
|
#include "workarounds.h" |
|
|
|
/* IRQ latency can be enormous because: |
|
* - All IRQs may be disabled on a CPU for a *long* time by e.g. a |
|
* slow serial console or an old IDE driver doing error recovery |
|
* - The PREEMPT_RT patches mostly deal with this, but also allow a |
|
* tasklet or normal task to be given higher priority than our IRQ |
|
* threads |
|
* Try to avoid blaming the hardware for this. |
|
*/ |
|
#define IRQ_TIMEOUT HZ |
|
|
|
/* |
|
* Loopback test packet structure |
|
* |
|
* The self-test should stress every RSS vector, and unfortunately |
|
* Falcon only performs RSS on TCP/UDP packets. |
|
*/ |
|
struct efx_loopback_payload { |
|
struct ethhdr header; |
|
struct iphdr ip; |
|
struct udphdr udp; |
|
__be16 iteration; |
|
char msg[64]; |
|
} __packed; |
|
|
|
/* Loopback test source MAC address */ |
|
static const u8 payload_source[ETH_ALEN] __aligned(2) = { |
|
0x00, 0x0f, 0x53, 0x1b, 0x1b, 0x1b, |
|
}; |
|
|
|
static const char payload_msg[] = |
|
"Hello world! This is an Efx loopback test in progress!"; |
|
|
|
/* Interrupt mode names */ |
|
static const unsigned int efx_interrupt_mode_max = EFX_INT_MODE_MAX; |
|
static const char *const efx_interrupt_mode_names[] = { |
|
[EFX_INT_MODE_MSIX] = "MSI-X", |
|
[EFX_INT_MODE_MSI] = "MSI", |
|
[EFX_INT_MODE_LEGACY] = "legacy", |
|
}; |
|
#define INT_MODE(efx) \ |
|
STRING_TABLE_LOOKUP(efx->interrupt_mode, efx_interrupt_mode) |
|
|
|
/** |
|
* struct efx_loopback_state - persistent state during a loopback selftest |
|
* @flush: Drop all packets in efx_loopback_rx_packet |
|
* @packet_count: Number of packets being used in this test |
|
* @skbs: An array of skbs transmitted |
|
* @offload_csum: Checksums are being offloaded |
|
* @rx_good: RX good packet count |
|
* @rx_bad: RX bad packet count |
|
* @payload: Payload used in tests |
|
*/ |
|
struct efx_loopback_state { |
|
bool flush; |
|
int packet_count; |
|
struct sk_buff **skbs; |
|
bool offload_csum; |
|
atomic_t rx_good; |
|
atomic_t rx_bad; |
|
struct efx_loopback_payload payload; |
|
}; |
|
|
|
/* How long to wait for all the packets to arrive (in ms) */ |
|
#define LOOPBACK_TIMEOUT_MS 1000 |
|
|
|
/************************************************************************** |
|
* |
|
* MII, NVRAM and register tests |
|
* |
|
**************************************************************************/ |
|
|
|
static int efx_test_phy_alive(struct efx_nic *efx, struct efx_self_tests *tests) |
|
{ |
|
int rc = 0; |
|
|
|
rc = efx_mcdi_phy_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); |
|
if (rc == -EPERM) |
|
rc = 0; |
|
else |
|
tests->nvram = rc ? -1 : 1; |
|
} |
|
|
|
return rc; |
|
} |
|
|
|
/************************************************************************** |
|
* |
|
* Interrupt and event queue testing |
|
* |
|
**************************************************************************/ |
|
|
|
/* Test generation and receipt of interrupts */ |
|
static int efx_test_interrupts(struct efx_nic *efx, |
|
struct efx_self_tests *tests) |
|
{ |
|
unsigned long timeout, wait; |
|
int cpu; |
|
int rc; |
|
|
|
netif_dbg(efx, drv, efx->net_dev, "testing interrupts\n"); |
|
tests->interrupt = -1; |
|
|
|
rc = efx_nic_irq_test_start(efx); |
|
if (rc == -ENOTSUPP) { |
|
netif_dbg(efx, drv, efx->net_dev, |
|
"direct interrupt testing not supported\n"); |
|
tests->interrupt = 0; |
|
return 0; |
|
} |
|
|
|
timeout = jiffies + IRQ_TIMEOUT; |
|
wait = 1; |
|
|
|
/* Wait for arrival of test interrupt. */ |
|
netif_dbg(efx, drv, efx->net_dev, "waiting for test interrupt\n"); |
|
do { |
|
schedule_timeout_uninterruptible(wait); |
|
cpu = efx_nic_irq_test_irq_cpu(efx); |
|
if (cpu >= 0) |
|
goto success; |
|
wait *= 2; |
|
} while (time_before(jiffies, timeout)); |
|
|
|
netif_err(efx, drv, efx->net_dev, "timed out waiting for interrupt\n"); |
|
return -ETIMEDOUT; |
|
|
|
success: |
|
netif_dbg(efx, drv, efx->net_dev, "%s test interrupt seen on CPU%d\n", |
|
INT_MODE(efx), cpu); |
|
tests->interrupt = 1; |
|
return 0; |
|
} |
|
|
|
/* Test generation and receipt of interrupting events */ |
|
static int efx_test_eventq_irq(struct efx_nic *efx, |
|
struct efx_self_tests *tests) |
|
{ |
|
struct efx_channel *channel; |
|
unsigned int read_ptr[EFX_MAX_CHANNELS]; |
|
unsigned long napi_ran = 0, dma_pend = 0, int_pend = 0; |
|
unsigned long timeout, wait; |
|
|
|
BUILD_BUG_ON(EFX_MAX_CHANNELS > BITS_PER_LONG); |
|
|
|
efx_for_each_channel(channel, efx) { |
|
read_ptr[channel->channel] = channel->eventq_read_ptr; |
|
set_bit(channel->channel, &dma_pend); |
|
set_bit(channel->channel, &int_pend); |
|
efx_nic_event_test_start(channel); |
|
} |
|
|
|
timeout = jiffies + IRQ_TIMEOUT; |
|
wait = 1; |
|
|
|
/* Wait for arrival of interrupts. NAPI processing may or may |
|
* not complete in time, but we can cope in any case. |
|
*/ |
|
do { |
|
schedule_timeout_uninterruptible(wait); |
|
|
|
efx_for_each_channel(channel, efx) { |
|
efx_stop_eventq(channel); |
|
if (channel->eventq_read_ptr != |
|
read_ptr[channel->channel]) { |
|
set_bit(channel->channel, &napi_ran); |
|
clear_bit(channel->channel, &dma_pend); |
|
clear_bit(channel->channel, &int_pend); |
|
} else { |
|
if (efx_nic_event_present(channel)) |
|
clear_bit(channel->channel, &dma_pend); |
|
if (efx_nic_event_test_irq_cpu(channel) >= 0) |
|
clear_bit(channel->channel, &int_pend); |
|
} |
|
efx_start_eventq(channel); |
|
} |
|
|
|
wait *= 2; |
|
} while ((dma_pend || int_pend) && time_before(jiffies, timeout)); |
|
|
|
efx_for_each_channel(channel, efx) { |
|
bool dma_seen = !test_bit(channel->channel, &dma_pend); |
|
bool int_seen = !test_bit(channel->channel, &int_pend); |
|
|
|
tests->eventq_dma[channel->channel] = dma_seen ? 1 : -1; |
|
tests->eventq_int[channel->channel] = int_seen ? 1 : -1; |
|
|
|
if (dma_seen && int_seen) { |
|
netif_dbg(efx, drv, efx->net_dev, |
|
"channel %d event queue passed (with%s NAPI)\n", |
|
channel->channel, |
|
test_bit(channel->channel, &napi_ran) ? |
|
"" : "out"); |
|
} else { |
|
/* Report failure and whether either interrupt or DMA |
|
* worked |
|
*/ |
|
netif_err(efx, drv, efx->net_dev, |
|
"channel %d timed out waiting for event queue\n", |
|
channel->channel); |
|
if (int_seen) |
|
netif_err(efx, drv, efx->net_dev, |
|
"channel %d saw interrupt " |
|
"during event queue test\n", |
|
channel->channel); |
|
if (dma_seen) |
|
netif_err(efx, drv, efx->net_dev, |
|
"channel %d event was generated, but " |
|
"failed to trigger an interrupt\n", |
|
channel->channel); |
|
} |
|
} |
|
|
|
return (dma_pend || int_pend) ? -ETIMEDOUT : 0; |
|
} |
|
|
|
static int efx_test_phy(struct efx_nic *efx, struct efx_self_tests *tests, |
|
unsigned flags) |
|
{ |
|
int rc; |
|
|
|
mutex_lock(&efx->mac_lock); |
|
rc = efx_mcdi_phy_run_tests(efx, tests->phy_ext, flags); |
|
mutex_unlock(&efx->mac_lock); |
|
if (rc == -EPERM) |
|
rc = 0; |
|
else |
|
netif_info(efx, drv, efx->net_dev, |
|
"%s phy selftest\n", rc ? "Failed" : "Passed"); |
|
|
|
return rc; |
|
} |
|
|
|
/************************************************************************** |
|
* |
|
* Loopback testing |
|
* NB Only one loopback test can be executing concurrently. |
|
* |
|
**************************************************************************/ |
|
|
|
/* Loopback test RX callback |
|
* This is called for each received packet during loopback testing. |
|
*/ |
|
void efx_loopback_rx_packet(struct efx_nic *efx, |
|
const char *buf_ptr, int pkt_len) |
|
{ |
|
struct efx_loopback_state *state = efx->loopback_selftest; |
|
struct efx_loopback_payload *received; |
|
struct efx_loopback_payload *payload; |
|
|
|
BUG_ON(!buf_ptr); |
|
|
|
/* If we are just flushing, then drop the packet */ |
|
if ((state == NULL) || state->flush) |
|
return; |
|
|
|
payload = &state->payload; |
|
|
|
received = (struct efx_loopback_payload *) buf_ptr; |
|
received->ip.saddr = payload->ip.saddr; |
|
if (state->offload_csum) |
|
received->ip.check = payload->ip.check; |
|
|
|
/* Check that header exists */ |
|
if (pkt_len < sizeof(received->header)) { |
|
netif_err(efx, drv, efx->net_dev, |
|
"saw runt RX packet (length %d) in %s loopback " |
|
"test\n", pkt_len, LOOPBACK_MODE(efx)); |
|
goto err; |
|
} |
|
|
|
/* Check that the ethernet header exists */ |
|
if (memcmp(&received->header, &payload->header, ETH_HLEN) != 0) { |
|
netif_err(efx, drv, efx->net_dev, |
|
"saw non-loopback RX packet in %s loopback test\n", |
|
LOOPBACK_MODE(efx)); |
|
goto err; |
|
} |
|
|
|
/* Check packet length */ |
|
if (pkt_len != sizeof(*payload)) { |
|
netif_err(efx, drv, efx->net_dev, |
|
"saw incorrect RX packet length %d (wanted %d) in " |
|
"%s loopback test\n", pkt_len, (int)sizeof(*payload), |
|
LOOPBACK_MODE(efx)); |
|
goto err; |
|
} |
|
|
|
/* Check that IP header matches */ |
|
if (memcmp(&received->ip, &payload->ip, sizeof(payload->ip)) != 0) { |
|
netif_err(efx, drv, efx->net_dev, |
|
"saw corrupted IP header in %s loopback test\n", |
|
LOOPBACK_MODE(efx)); |
|
goto err; |
|
} |
|
|
|
/* Check that msg and padding matches */ |
|
if (memcmp(&received->msg, &payload->msg, sizeof(received->msg)) != 0) { |
|
netif_err(efx, drv, efx->net_dev, |
|
"saw corrupted RX packet in %s loopback test\n", |
|
LOOPBACK_MODE(efx)); |
|
goto err; |
|
} |
|
|
|
/* Check that iteration matches */ |
|
if (received->iteration != payload->iteration) { |
|
netif_err(efx, drv, efx->net_dev, |
|
"saw RX packet from iteration %d (wanted %d) in " |
|
"%s loopback test\n", ntohs(received->iteration), |
|
ntohs(payload->iteration), LOOPBACK_MODE(efx)); |
|
goto err; |
|
} |
|
|
|
/* Increase correct RX count */ |
|
netif_vdbg(efx, drv, efx->net_dev, |
|
"got loopback RX in %s loopback test\n", LOOPBACK_MODE(efx)); |
|
|
|
atomic_inc(&state->rx_good); |
|
return; |
|
|
|
err: |
|
#ifdef DEBUG |
|
if (atomic_read(&state->rx_bad) == 0) { |
|
netif_err(efx, drv, efx->net_dev, "received packet:\n"); |
|
print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
|
buf_ptr, pkt_len, 0); |
|
netif_err(efx, drv, efx->net_dev, "expected packet:\n"); |
|
print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 0x10, 1, |
|
&state->payload, sizeof(state->payload), 0); |
|
} |
|
#endif |
|
atomic_inc(&state->rx_bad); |
|
} |
|
|
|
/* Initialise an efx_selftest_state for a new iteration */ |
|
static void efx_iterate_state(struct efx_nic *efx) |
|
{ |
|
struct efx_loopback_state *state = efx->loopback_selftest; |
|
struct net_device *net_dev = efx->net_dev; |
|
struct efx_loopback_payload *payload = &state->payload; |
|
|
|
/* Initialise the layerII header */ |
|
ether_addr_copy((u8 *)&payload->header.h_dest, net_dev->dev_addr); |
|
ether_addr_copy((u8 *)&payload->header.h_source, payload_source); |
|
payload->header.h_proto = htons(ETH_P_IP); |
|
|
|
/* saddr set later and used as incrementing count */ |
|
payload->ip.daddr = htonl(INADDR_LOOPBACK); |
|
payload->ip.ihl = 5; |
|
payload->ip.check = (__force __sum16) htons(0xdead); |
|
payload->ip.tot_len = htons(sizeof(*payload) - sizeof(struct ethhdr)); |
|
payload->ip.version = IPVERSION; |
|
payload->ip.protocol = IPPROTO_UDP; |
|
|
|
/* Initialise udp header */ |
|
payload->udp.source = 0; |
|
payload->udp.len = htons(sizeof(*payload) - sizeof(struct ethhdr) - |
|
sizeof(struct iphdr)); |
|
payload->udp.check = 0; /* checksum ignored */ |
|
|
|
/* Fill out payload */ |
|
payload->iteration = htons(ntohs(payload->iteration) + 1); |
|
memcpy(&payload->msg, payload_msg, sizeof(payload_msg)); |
|
|
|
/* Fill out remaining state members */ |
|
atomic_set(&state->rx_good, 0); |
|
atomic_set(&state->rx_bad, 0); |
|
smp_wmb(); |
|
} |
|
|
|
static int efx_begin_loopback(struct efx_tx_queue *tx_queue) |
|
{ |
|
struct efx_nic *efx = tx_queue->efx; |
|
struct efx_loopback_state *state = efx->loopback_selftest; |
|
struct efx_loopback_payload *payload; |
|
struct sk_buff *skb; |
|
int i; |
|
netdev_tx_t rc; |
|
|
|
/* Transmit N copies of buffer */ |
|
for (i = 0; i < state->packet_count; i++) { |
|
/* Allocate an skb, holding an extra reference for |
|
* transmit completion counting */ |
|
skb = alloc_skb(sizeof(state->payload), GFP_KERNEL); |
|
if (!skb) |
|
return -ENOMEM; |
|
state->skbs[i] = skb; |
|
skb_get(skb); |
|
|
|
/* Copy the payload in, incrementing the source address to |
|
* exercise the rss vectors */ |
|
payload = skb_put(skb, sizeof(state->payload)); |
|
memcpy(payload, &state->payload, sizeof(state->payload)); |
|
payload->ip.saddr = htonl(INADDR_LOOPBACK | (i << 2)); |
|
|
|
/* Ensure everything we've written is visible to the |
|
* interrupt handler. */ |
|
smp_wmb(); |
|
|
|
netif_tx_lock_bh(efx->net_dev); |
|
rc = efx_enqueue_skb(tx_queue, skb); |
|
netif_tx_unlock_bh(efx->net_dev); |
|
|
|
if (rc != NETDEV_TX_OK) { |
|
netif_err(efx, drv, efx->net_dev, |
|
"TX queue %d could not transmit packet %d of " |
|
"%d in %s loopback test\n", tx_queue->label, |
|
i + 1, state->packet_count, |
|
LOOPBACK_MODE(efx)); |
|
|
|
/* Defer cleaning up the other skbs for the caller */ |
|
kfree_skb(skb); |
|
return -EPIPE; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int efx_poll_loopback(struct efx_nic *efx) |
|
{ |
|
struct efx_loopback_state *state = efx->loopback_selftest; |
|
|
|
return atomic_read(&state->rx_good) == state->packet_count; |
|
} |
|
|
|
static int efx_end_loopback(struct efx_tx_queue *tx_queue, |
|
struct efx_loopback_self_tests *lb_tests) |
|
{ |
|
struct efx_nic *efx = tx_queue->efx; |
|
struct efx_loopback_state *state = efx->loopback_selftest; |
|
struct sk_buff *skb; |
|
int tx_done = 0, rx_good, rx_bad; |
|
int i, rc = 0; |
|
|
|
netif_tx_lock_bh(efx->net_dev); |
|
|
|
/* Count the number of tx completions, and decrement the refcnt. Any |
|
* skbs not already completed will be free'd when the queue is flushed */ |
|
for (i = 0; i < state->packet_count; i++) { |
|
skb = state->skbs[i]; |
|
if (skb && !skb_shared(skb)) |
|
++tx_done; |
|
dev_kfree_skb(skb); |
|
} |
|
|
|
netif_tx_unlock_bh(efx->net_dev); |
|
|
|
/* Check TX completion and received packet counts */ |
|
rx_good = atomic_read(&state->rx_good); |
|
rx_bad = atomic_read(&state->rx_bad); |
|
if (tx_done != state->packet_count) { |
|
/* Don't free the skbs; they will be picked up on TX |
|
* overflow or channel teardown. |
|
*/ |
|
netif_err(efx, drv, efx->net_dev, |
|
"TX queue %d saw only %d out of an expected %d " |
|
"TX completion events in %s loopback test\n", |
|
tx_queue->label, 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->label, rx_good, state->packet_count, |
|
LOOPBACK_MODE(efx)); |
|
rc = -ETIMEDOUT; |
|
/* Fall through */ |
|
} |
|
|
|
/* Update loopback test structure */ |
|
lb_tests->tx_sent[tx_queue->label] += state->packet_count; |
|
lb_tests->tx_done[tx_queue->label] += tx_done; |
|
lb_tests->rx_good += rx_good; |
|
lb_tests->rx_bad += rx_bad; |
|
|
|
return rc; |
|
} |
|
|
|
static int |
|
efx_test_loopback(struct efx_tx_queue *tx_queue, |
|
struct efx_loopback_self_tests *lb_tests) |
|
{ |
|
struct efx_nic *efx = tx_queue->efx; |
|
struct efx_loopback_state *state = efx->loopback_selftest; |
|
int i, begin_rc, end_rc; |
|
|
|
for (i = 0; i < 3; i++) { |
|
/* Determine how many packets to send */ |
|
state->packet_count = efx->txq_entries / 3; |
|
state->packet_count = min(1 << (i << 2), state->packet_count); |
|
state->skbs = kcalloc(state->packet_count, |
|
sizeof(state->skbs[0]), GFP_KERNEL); |
|
if (!state->skbs) |
|
return -ENOMEM; |
|
state->flush = false; |
|
|
|
netif_dbg(efx, drv, efx->net_dev, |
|
"TX queue %d (hw %d) testing %s loopback with %d packets\n", |
|
tx_queue->label, tx_queue->queue, LOOPBACK_MODE(efx), |
|
state->packet_count); |
|
|
|
efx_iterate_state(efx); |
|
begin_rc = efx_begin_loopback(tx_queue); |
|
|
|
/* This will normally complete very quickly, but be |
|
* prepared to wait much longer. */ |
|
msleep(1); |
|
if (!efx_poll_loopback(efx)) { |
|
msleep(LOOPBACK_TIMEOUT_MS); |
|
efx_poll_loopback(efx); |
|
} |
|
|
|
end_rc = efx_end_loopback(tx_queue, lb_tests); |
|
kfree(state->skbs); |
|
|
|
if (begin_rc || end_rc) { |
|
/* Wait a while to ensure there are no packets |
|
* floating around after a failure. */ |
|
schedule_timeout_uninterruptible(HZ / 10); |
|
return begin_rc ? begin_rc : end_rc; |
|
} |
|
} |
|
|
|
netif_dbg(efx, drv, efx->net_dev, |
|
"TX queue %d passed %s loopback test with a burst length " |
|
"of %d packets\n", tx_queue->label, LOOPBACK_MODE(efx), |
|
state->packet_count); |
|
|
|
return 0; |
|
} |
|
|
|
/* Wait for link up. On Falcon, we would prefer to rely on efx_monitor, but |
|
* any contention on the mac lock (via e.g. efx_mac_mcast_work) causes it |
|
* to delay and retry. Therefore, it's safer to just poll directly. Wait |
|
* for link up and any faults to dissipate. */ |
|
static int efx_wait_for_link(struct efx_nic *efx) |
|
{ |
|
struct efx_link_state *link_state = &efx->link_state; |
|
int count, link_up_count = 0; |
|
bool link_up; |
|
|
|
for (count = 0; count < 40; count++) { |
|
schedule_timeout_uninterruptible(HZ / 10); |
|
|
|
if (efx->type->monitor != NULL) { |
|
mutex_lock(&efx->mac_lock); |
|
efx->type->monitor(efx); |
|
mutex_unlock(&efx->mac_lock); |
|
} |
|
|
|
mutex_lock(&efx->mac_lock); |
|
link_up = link_state->up; |
|
if (link_up) |
|
link_up = !efx->type->check_mac_fault(efx); |
|
mutex_unlock(&efx->mac_lock); |
|
|
|
if (link_up) { |
|
if (++link_up_count == 2) |
|
return 0; |
|
} else { |
|
link_up_count = 0; |
|
} |
|
} |
|
|
|
return -ETIMEDOUT; |
|
} |
|
|
|
static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, |
|
unsigned int loopback_modes) |
|
{ |
|
enum efx_loopback_mode mode; |
|
struct efx_loopback_state *state; |
|
struct efx_channel *channel = |
|
efx_get_channel(efx, efx->tx_channel_offset); |
|
struct efx_tx_queue *tx_queue; |
|
int rc = 0; |
|
|
|
/* Set the port loopback_selftest member. From this point on |
|
* all received packets will be dropped. Mark the state as |
|
* "flushing" so all inflight packets are dropped */ |
|
state = kzalloc(sizeof(*state), GFP_KERNEL); |
|
if (state == NULL) |
|
return -ENOMEM; |
|
BUG_ON(efx->loopback_selftest); |
|
state->flush = true; |
|
efx->loopback_selftest = state; |
|
|
|
/* Test all supported loopback modes */ |
|
for (mode = LOOPBACK_NONE; mode <= LOOPBACK_TEST_MAX; mode++) { |
|
if (!(loopback_modes & (1 << mode))) |
|
continue; |
|
|
|
/* Move the port into the specified loopback mode. */ |
|
state->flush = true; |
|
mutex_lock(&efx->mac_lock); |
|
efx->loopback_mode = mode; |
|
rc = __efx_reconfigure_port(efx); |
|
mutex_unlock(&efx->mac_lock); |
|
if (rc) { |
|
netif_err(efx, drv, efx->net_dev, |
|
"unable to move into %s loopback\n", |
|
LOOPBACK_MODE(efx)); |
|
goto out; |
|
} |
|
|
|
rc = efx_wait_for_link(efx); |
|
if (rc) { |
|
netif_err(efx, drv, efx->net_dev, |
|
"loopback %s never came up\n", |
|
LOOPBACK_MODE(efx)); |
|
goto out; |
|
} |
|
|
|
/* Test all enabled types of TX queue */ |
|
efx_for_each_channel_tx_queue(tx_queue, channel) { |
|
state->offload_csum = (tx_queue->type & |
|
EFX_TXQ_TYPE_OUTER_CSUM); |
|
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); |
|
|
|
if (rc == -EPERM) |
|
rc = 0; |
|
|
|
return rc; |
|
} |
|
|
|
/************************************************************************** |
|
* |
|
* Entry point |
|
* |
|
*************************************************************************/ |
|
|
|
int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests, |
|
unsigned flags) |
|
{ |
|
enum efx_loopback_mode loopback_mode = efx->loopback_mode; |
|
int phy_mode = efx->phy_mode; |
|
int rc_test = 0, rc_reset, rc; |
|
|
|
efx_selftest_async_cancel(efx); |
|
|
|
/* Online (i.e. non-disruptive) testing |
|
* This checks interrupt generation, event delivery and PHY presence. */ |
|
|
|
rc = efx_test_phy_alive(efx, tests); |
|
if (rc && !rc_test) |
|
rc_test = rc; |
|
|
|
rc = efx_test_nvram(efx, tests); |
|
if (rc && !rc_test) |
|
rc_test = rc; |
|
|
|
rc = efx_test_interrupts(efx, tests); |
|
if (rc && !rc_test) |
|
rc_test = rc; |
|
|
|
rc = efx_test_eventq_irq(efx, tests); |
|
if (rc && !rc_test) |
|
rc_test = rc; |
|
|
|
if (rc_test) |
|
return rc_test; |
|
|
|
if (!(flags & ETH_TEST_FL_OFFLINE)) |
|
return efx_test_phy(efx, tests, flags); |
|
|
|
/* Offline (i.e. disruptive) testing |
|
* This checks MAC and PHY loopback on the specified port. */ |
|
|
|
/* Detach the device so the kernel doesn't transmit during the |
|
* loopback test and the watchdog timeout doesn't fire. |
|
*/ |
|
efx_device_detach_sync(efx); |
|
|
|
if (efx->type->test_chip) { |
|
rc_reset = efx->type->test_chip(efx, tests); |
|
if (rc_reset) { |
|
netif_err(efx, hw, efx->net_dev, |
|
"Unable to recover from chip test\n"); |
|
efx_schedule_reset(efx, RESET_TYPE_DISABLE); |
|
return rc_reset; |
|
} |
|
|
|
if ((tests->memory < 0 || tests->registers < 0) && !rc_test) |
|
rc_test = -EIO; |
|
} |
|
|
|
/* Ensure that the phy is powered and out of loopback |
|
* for the bist and loopback tests */ |
|
mutex_lock(&efx->mac_lock); |
|
efx->phy_mode &= ~PHY_MODE_LOW_POWER; |
|
efx->loopback_mode = LOOPBACK_NONE; |
|
__efx_reconfigure_port(efx); |
|
mutex_unlock(&efx->mac_lock); |
|
|
|
rc = efx_test_phy(efx, tests, flags); |
|
if (rc && !rc_test) |
|
rc_test = rc; |
|
|
|
rc = efx_test_loopbacks(efx, tests, efx->loopback_modes); |
|
if (rc && !rc_test) |
|
rc_test = rc; |
|
|
|
/* restore the PHY to the previous state */ |
|
mutex_lock(&efx->mac_lock); |
|
efx->phy_mode = phy_mode; |
|
efx->loopback_mode = loopback_mode; |
|
__efx_reconfigure_port(efx); |
|
mutex_unlock(&efx->mac_lock); |
|
|
|
efx_device_attach_if_not_resetting(efx); |
|
|
|
return rc_test; |
|
} |
|
|
|
void efx_selftest_async_start(struct efx_nic *efx) |
|
{ |
|
struct efx_channel *channel; |
|
|
|
efx_for_each_channel(channel, efx) |
|
efx_nic_event_test_start(channel); |
|
schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT); |
|
} |
|
|
|
void efx_selftest_async_cancel(struct efx_nic *efx) |
|
{ |
|
cancel_delayed_work_sync(&efx->selftest_work); |
|
} |
|
|
|
static void efx_selftest_async_work(struct work_struct *data) |
|
{ |
|
struct efx_nic *efx = container_of(data, struct efx_nic, |
|
selftest_work.work); |
|
struct efx_channel *channel; |
|
int cpu; |
|
|
|
efx_for_each_channel(channel, efx) { |
|
cpu = efx_nic_event_test_irq_cpu(channel); |
|
if (cpu < 0) |
|
netif_err(efx, ifup, efx->net_dev, |
|
"channel %d failed to trigger an interrupt\n", |
|
channel->channel); |
|
else |
|
netif_dbg(efx, ifup, efx->net_dev, |
|
"channel %d triggered interrupt on CPU %d\n", |
|
channel->channel, cpu); |
|
} |
|
} |
|
|
|
void efx_selftest_async_init(struct efx_nic *efx) |
|
{ |
|
INIT_DELAYED_WORK(&efx->selftest_work, efx_selftest_async_work); |
|
}
|
|
|