igb: add counter for dma out of sync errors
Add a counter for dma out of sync errors reported via interrupt.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 8c27e0a..c05ca34 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -689,7 +689,7 @@
wr32(E1000_EIAC, adapter->eims_enable_mask);
wr32(E1000_EIAM, adapter->eims_enable_mask);
wr32(E1000_EIMS, adapter->eims_enable_mask);
- wr32(E1000_IMS, E1000_IMS_LSC);
+ wr32(E1000_IMS, E1000_IMS_LSC | E1000_IMS_DOUTSYNC);
} else {
wr32(E1000_IMS, IMS_ENABLE_MASK);
wr32(E1000_IAM, IMS_ENABLE_MASK);
@@ -3287,6 +3287,11 @@
u32 icr = rd32(E1000_ICR);
/* reading ICR causes bit 31 of EICR to be cleared */
+
+ if(icr & E1000_ICR_DOUTSYNC) {
+ /* HW is reporting DMA is out of sync */
+ adapter->stats.doosync++;
+ }
if (!(icr & E1000_ICR_LSC))
goto no_link_interrupt;
hw->mac.get_link_status = 1;
@@ -3295,7 +3300,7 @@
mod_timer(&adapter->watchdog_timer, jiffies + 1);
no_link_interrupt:
- wr32(E1000_IMS, E1000_IMS_LSC);
+ wr32(E1000_IMS, E1000_IMS_LSC | E1000_IMS_DOUTSYNC);
wr32(E1000_EIMS, adapter->eims_other);
return IRQ_HANDLED;
@@ -3499,6 +3504,11 @@
igb_write_itr(adapter->rx_ring);
+ if(icr & E1000_ICR_DOUTSYNC) {
+ /* HW is reporting DMA is out of sync */
+ adapter->stats.doosync++;
+ }
+
if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
hw->mac.get_link_status = 1;
if (!test_bit(__IGB_DOWN, &adapter->state))
@@ -3534,6 +3544,11 @@
if (!(icr & E1000_ICR_INT_ASSERTED))
return IRQ_NONE;
+ if(icr & E1000_ICR_DOUTSYNC) {
+ /* HW is reporting DMA is out of sync */
+ adapter->stats.doosync++;
+ }
+
eicr = rd32(E1000_EICR);
if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {