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: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 5 deletions

diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index d17cea9f4e88..15616dd9ed41 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -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 = {