redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

sfc: Speed up loopback self-test

Browse source 
Add efx_poll_loopback() function to test for successful completion of test.
Change efx_test_loopback() to end the test after 1 ms if
efx_poll_loopback() indicates success, and otherwise to wait for 100 ms
as before.

While we're here, rename efx_{rx,tx}_loopback() to
efx_{begin,end}_loopback() which more accurately reflect their
purpose.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Ben Hutchings 2008-09-01 12:46:33 +01:00 committed by Jeff Garzik
parent f8ea0b6743
commit b9aafb0e91
1 changed files with 29 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
drivers/net/sfc/selftest.c
View file

@ -400,7 +400,7 @@ static void efx_iterate_state(struct efx_nic *efx)
smp_wmb();
}
static int efx_tx_loopback(struct efx_tx_queue *tx_queue)
static int efx_begin_loopback(struct efx_tx_queue *tx_queue)
{
struct efx_nic *efx = tx_queue->efx;
struct efx_selftest_state *state = efx->loopback_selftest;
@ -449,8 +449,22 @@ static int efx_tx_loopback(struct efx_tx_queue *tx_queue)
return 0;
}
static int efx_rx_loopback(struct efx_tx_queue *tx_queue,
struct efx_loopback_self_tests *lb_tests)
static int efx_poll_loopback(struct efx_nic *efx)
{
struct efx_selftest_state *state = efx->loopback_selftest;
struct efx_channel *channel;
/* NAPI polling is not enabled, so process channels
* synchronously */
efx_for_each_channel_with_interrupt(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_selftest_state *state = efx->loopback_selftest;
@ -513,8 +527,7 @@ efx_test_loopback(struct efx_tx_queue *tx_queue,
{
struct efx_nic *efx = tx_queue->efx;
struct efx_selftest_state *state = efx->loopback_selftest;
struct efx_channel *channel;
int i, tx_rc, rx_rc;
int i, begin_rc, end_rc;
for (i = 0; i < loopback_test_level; i++) {
/* Determine how many packets to send */
@ -531,23 +544,24 @@ efx_test_loopback(struct efx_tx_queue *tx_queue,
state->packet_count);
efx_iterate_state(efx);
tx_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);
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);
}
rx_rc = efx_rx_loopback(tx_queue, lb_tests);
end_rc = efx_end_loopback(tx_queue, lb_tests);
kfree(state->skbs);
if (tx_rc || rx_rc) {
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 tx_rc ? tx_rc : rx_rc;
return begin_rc ? begin_rc : end_rc;
}
}