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Commit 9007b9fa authored by Ben Hutchings's avatar Ben Hutchings Committed by David S. Miller
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sfc: Simplify XMAC link polling 



From: Steve Hodgson <shodgson@solarflare.com>

Only the XMAC on Falcon needs help from the driver to poll and reset
the MAC-PHY link (XAUI); GMII is a simple parallel bus and on later
NICs firmware takes care of the XAUI link.  Also, an XMAC interrupt
currently schedules a work item which simply clears a flag
(efx_nic::mac_up) to be checked by the regular monitor (or the next
link reconfiguration, if that is sooner).

Rename the flag to xmac_poll_required, changing its sense.  Remove the
needless indirection and just set the flag immediately.  Call
falcon_xmac_poll() directly where required.

Add a new generic operation mac_op::check_fault to check the link
outside of regular monitoring, as required during self-tests.

(Note that this leaves us with an unused work item, but we will
immediately have another use for it.)

Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fe75820b

drivers/net/sfc/efx.c

+0 −5
Original line number Diff line number Diff line
@@ -693,8 +693,6 @@ static void efx_mac_work(struct work_struct *data) 
	struct efx_nic *efx = container_of(data, struct efx_nic, mac_work);



	mutex_lock(&efx->mac_lock);

	if (efx->port_enabled)

		efx->mac_op->irq(efx);

	mutex_unlock(&efx->mac_lock);

}
@@ -774,7 +772,6 @@ static void efx_start_port(struct efx_nic *efx) 
	mutex_lock(&efx->mac_lock);

	efx->port_enabled = true;

	__efx_reconfigure_port(efx);

	efx->mac_op->irq(efx);

	mutex_unlock(&efx->mac_lock);

}
@@ -1903,8 +1900,6 @@ void efx_port_dummy_op_set_id_led(struct efx_nic *efx, enum efx_led_mode mode) 


static struct efx_mac_operations efx_dummy_mac_operations = {

	.reconfigure	= efx_port_dummy_op_void,

	.poll		= efx_port_dummy_op_void,

	.irq		= efx_port_dummy_op_void,

};



static struct efx_phy_operations efx_dummy_phy_operations = {

drivers/net/sfc/falcon.c

+4 −3
Original line number Diff line number Diff line
@@ -900,7 +900,7 @@ static void falcon_handle_global_event(struct efx_channel *channel, 


	if ((falcon_rev(efx) >= FALCON_REV_B0) &&

	    EFX_QWORD_FIELD(*event, FSF_BB_GLB_EV_XG_MGT_INTR)) {

		queue_work(efx->workqueue, &efx->mac_work);

		efx->xmac_poll_required = true;

		handled = true;

	}
@@ -2251,7 +2251,7 @@ int falcon_switch_mac(struct efx_nic *efx) 


	EFX_LOG(efx, "selected %cMAC\n", EFX_IS10G(efx) ? 'X' : 'G');

	/* Not all macs support a mac-level link state */

	efx->mac_up = true;

	efx->xmac_poll_required = false;



	rc = falcon_reset_macs(efx);

out:
@@ -2624,7 +2624,8 @@ void falcon_monitor(struct efx_nic *efx) 
		falcon_sim_phy_event(efx);

	}

	efx->phy_op->poll(efx);

	efx->mac_op->poll(efx);

	if (EFX_IS10G(efx))

		falcon_poll_xmac(efx);

}



/* Zeroes out the SRAM contents.  This routine must be called in

drivers/net/sfc/falcon.h

+2 −0
Original line number Diff line number Diff line
@@ -209,4 +209,6 @@ extern int falcon_test_registers(struct efx_nic *efx); 
extern void falcon_generate_event(struct efx_channel *channel,

				  efx_qword_t *event);



extern void falcon_poll_xmac(struct efx_nic *efx);



#endif /* EFX_FALCON_H */

drivers/net/sfc/falcon_boards.c

+2 −2
Original line number Diff line number Diff line
@@ -380,7 +380,7 @@ static int sfe4001_check_hw(struct efx_nic *efx) 
	s32 status;



	/* If XAUI link is up then do not monitor */

	if (EFX_WORKAROUND_7884(efx) && efx->mac_up)

	if (EFX_WORKAROUND_7884(efx) && !efx->xmac_poll_required)

		return 0;



	/* Check the powered status of the PHY. Lack of power implies that
@@ -468,7 +468,7 @@ static int sfn4111t_check_hw(struct efx_nic *efx) 
	s32 status;



	/* If XAUI link is up then do not monitor */

	if (EFX_WORKAROUND_7884(efx) && efx->mac_up)

	if (EFX_WORKAROUND_7884(efx) && !efx->xmac_poll_required)

		return 0;



	/* Test LHIGH, RHIGH, FAULT, EOT and IOT alarms */

drivers/net/sfc/falcon_gmac.c

+6 −2
Original line number Diff line number Diff line
@@ -216,9 +216,13 @@ static void falcon_update_stats_gmac(struct efx_nic *efx) 
	mac_stats->rx_lt64 = mac_stats->rx_good_lt64 + mac_stats->rx_bad_lt64;

}



static bool falcon_gmac_check_fault(struct efx_nic *efx)

{

	return false;

}



struct efx_mac_operations falcon_gmac_operations = {

	.reconfigure	= falcon_reconfigure_gmac,

	.update_stats	= falcon_update_stats_gmac,

	.irq		= efx_port_dummy_op_void,

	.poll		= efx_port_dummy_op_void,

	.check_fault 	= falcon_gmac_check_fault,

};