sfc: Add AER and EEH support for Siena

The Linux side of EEH is triggered by MMIO reads, but this
driver's data path does not issue any MMIO reads (except in
legacy interrupt mode).  Therefore add a monitor function
to poll EEH periodically.

When preparing to reset the device based on our own error
detection, also poll EEH and defer to its recovery mechanism
if appropriate.

[bwh: Use a separate condition for the initial link poll; fix some
 style errors]
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index c83fe090406d..9e900817d2ab 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -429,6 +429,7 @@ enum nic_state {
         STATE_UNINIT = 0,       /* device being probed/removed or is frozen */
         STATE_READY = 1,        /* hardware ready and netdev registered */
         STATE_DISABLED = 2,     /* device disabled due to hardware errors */
+        STATE_RECOVERY = 3,     /* device recovering from PCI error */
 };
 
 /*