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sfc: Simplify XMAC link polling

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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>
This commit is contained in:
Ben Hutchings
2009-11-25 16:12:01 +00:00
committed by David S. Miller
parent fe75820b99
commit 9007b9fa36
8 changed files with 41 additions and 54 deletions
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7
drivers/net/sfc/falcon.c
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@@ -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