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Commit 78c1f0a0 authored by Steve Hodgson's avatar Steve Hodgson Committed by David S. Miller
Browse files

sfc: Generalise link state monitoring 



Use the efx_nic_type::monitor operation or event handling as
appropriate.

Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d3245b28

drivers/net/sfc/efx.c

+14 −2
Original line number Diff line number Diff line
@@ -1174,10 +1174,18 @@ static void efx_start_all(struct efx_nic *efx) 


	falcon_enable_interrupts(efx);



	/* Start the hardware monitor (if there is one) if we're in RUNNING */

	if (efx->state == STATE_RUNNING && efx->type->monitor != NULL)

	/* Start the hardware monitor if there is one. Otherwise (we're link

	 * event driven), we have to poll the PHY because after an event queue

	 * flush, we could have a missed a link state change */

	if (efx->type->monitor != NULL) {

		queue_delayed_work(efx->workqueue, &efx->monitor_work,

				   efx_monitor_interval);

	} else {

		mutex_lock(&efx->mac_lock);

		if (efx->phy_op->poll(efx))

			efx_link_status_changed(efx);

		mutex_unlock(&efx->mac_lock);

	}



	efx->type->start_stats(efx);

}
@@ -1421,6 +1429,10 @@ static int efx_net_open(struct net_device *net_dev) 
	if (efx->phy_mode & PHY_MODE_SPECIAL)

		return -EBUSY;



	/* Notify the kernel of the link state polled during driver load,

	 * before the monitor starts running */

	efx_link_status_changed(efx);



	efx_start_all(efx);

	return 0;

}

drivers/net/sfc/selftest.c

+47 −32
Original line number Diff line number Diff line
@@ -563,14 +563,49 @@ efx_test_loopback(struct efx_tx_queue *tx_queue, 
	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;

	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->channel[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)

			return 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_tx_queue *tx_queue;

	bool link_up;

	int count, rc = 0;

	int rc = 0;



	/* Set the port loopback_selftest member. From this point on

	 * all received packets will be dropped. Mark the state as
@@ -589,43 +624,23 @@ static int efx_test_loopbacks(struct efx_nic *efx, struct efx_self_tests *tests, 


		/* Move the port into the specified loopback mode. */

		state->flush = true;

		mutex_lock(&efx->mac_lock);

		efx->loopback_mode = mode;

		efx_reconfigure_port(efx);



		/* Wait for the PHY to signal the link is up. Interrupts

		 * are enabled for PHY's using LASI, otherwise we poll()

		 * quickly */

		count = 0;

		do {

			struct efx_channel *channel = &efx->channel[0];



			efx->phy_op->poll(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();



			/* We need both the PHY and MAC-PHY links to be OK */

			link_up = efx->link_state.up;

			if (link_up)

				link_up = !efx->mac_op->check_fault(efx);



		} while ((++count < 20) && !link_up);

		rc = __efx_reconfigure_port(efx);

		mutex_unlock(&efx->mac_lock);

		if (rc) {

			EFX_ERR(efx, "unable to move into %s loopback\n",

				LOOPBACK_MODE(efx));

			goto out;

		}



		/* The link should now be up. If it isn't, there is no point

		 * in attempting a loopback test */

		if (!link_up) {

		rc = efx_wait_for_link(efx);

		if (rc) {

			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) {

			state->offload_csum = (tx_queue->queue ==