diff options
| -rw-r--r-- | sys/dev/e1000/if_igb.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sys/dev/e1000/if_igb.c b/sys/dev/e1000/if_igb.c index 484cba1..b1fc572 100644 --- a/sys/dev/e1000/if_igb.c +++ b/sys/dev/e1000/if_igb.c @@ -4517,6 +4517,18 @@ igb_initialize_receive_units(struct adapter *adapter) rctl |= E1000_RCTL_SZ_2048; } + /* + * If TX flow control is disabled and there's >1 queue defined, + * enable DROP. + * + * This drops frames rather than hanging the RX MAC for all queues. + */ + if ((adapter->num_queues > 1) && + (adapter->fc == e1000_fc_none || + adapter->fc == e1000_fc_rx_pause)) { + srrctl |= E1000_SRRCTL_DROP_EN; + } + /* Setup the Base and Length of the Rx Descriptor Rings */ for (int i = 0; i < adapter->num_queues; i++, rxr++) { u64 bus_addr = rxr->rxdma.dma_paddr; @@ -6053,6 +6065,7 @@ igb_set_flowcntl(SYSCTL_HANDLER_ARGS) adapter->hw.fc.current_mode = adapter->hw.fc.requested_mode; e1000_force_mac_fc(&adapter->hw); + /* XXX TODO: update DROP_EN on each RX queue if appropriate */ return (error); } |
