diff options
| -rw-r--r-- | drivers/net/e1000.c | 10 | ||||
| -rw-r--r-- | drivers/net/e1000.h | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c index 2d4da4b38..8ba98b27d 100644 --- a/drivers/net/e1000.c +++ b/drivers/net/e1000.c @@ -1688,6 +1688,16 @@ e1000_init_hw(struct eth_device *nic) E1000_WRITE_REG(hw, TXDCTL, ctrl); } + /* Set the receive descriptor write back policy */ + + if (hw->mac_type >= e1000_82571) { + ctrl = E1000_READ_REG(hw, RXDCTL); + ctrl = + (ctrl & ~E1000_RXDCTL_WTHRESH) | + E1000_RXDCTL_FULL_RX_DESC_WB; + E1000_WRITE_REG(hw, RXDCTL, ctrl); + } + switch (hw->mac_type) { default: break; diff --git a/drivers/net/e1000.h b/drivers/net/e1000.h index fd1d8f871..1bbae5085 100644 --- a/drivers/net/e1000.h +++ b/drivers/net/e1000.h @@ -1551,6 +1551,7 @@ struct e1000_hw { #define E1000_RXDCTL_HTHRESH 0x00003F00 /* RXDCTL Host Threshold */ #define E1000_RXDCTL_WTHRESH 0x003F0000 /* RXDCTL Writeback Threshold */ #define E1000_RXDCTL_GRAN 0x01000000 /* RXDCTL Granularity */ +#define E1000_RXDCTL_FULL_RX_DESC_WB 0x01010000 /* GRAN=1, WTHRESH=1 */ /* Transmit Descriptor Control */ #define E1000_TXDCTL_PTHRESH 0x0000003F /* TXDCTL Prefetch Threshold */ |