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e1000e: Support RXALL feature flag. 

This allows the NIC to receive all frames available, including
those with bad FCS, un-matched vlans, ethernet control frames,
and more.

Tested by sending frames with bad FCS.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Ben Greear 2012-02-11 15:39:51 +00:00 committed by Jeff Kirsher
parent 5e0c03c8cd
commit cf955e6c96
2 changed files with 26 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/intel/e1000e/defines.h
View File

@ -177,6 +177,7 @@
#define E1000_RCTL_VFE 0x00040000 /* vlan filter enable */
#define E1000_RCTL_CFIEN 0x00080000 /* canonical form enable */
#define E1000_RCTL_CFI 0x00100000 /* canonical form indicator */
#define E1000_RCTL_DPF 0x00400000 /* Discard Pause Frames */
#define E1000_RCTL_PMCF 0x00800000 /* pass MAC control frames */
#define E1000_RCTL_BSEX 0x02000000 /* Buffer size extension */
#define E1000_RCTL_SECRC 0x04000000 /* Strip Ethernet CRC */

29
drivers/net/ethernet/intel/e1000e/netdev.c
View File

@ -926,7 +926,8 @@ static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done,
goto next_desc;
}
if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
!(netdev->features & NETIF_F_RXALL))) {
/* recycle */
buffer_info->skb = skb;
goto next_desc;
@ -1255,7 +1256,8 @@ static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
goto next_desc;
}
if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
!(netdev->features & NETIF_F_RXALL))) {
dev_kfree_skb_irq(skb);
goto next_desc;
}
@ -1454,7 +1456,8 @@ static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done,
/* errors is only valid for DD + EOP descriptors */
if (unlikely((staterr & E1000_RXD_STAT_EOP) &&
(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK))) {
((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
!(netdev->features & NETIF_F_RXALL)))) {
/* recycle both page and skb */
buffer_info->skb = skb;
/* an error means any chain goes out the window too */
@ -2997,6 +3000,22 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
ew32(PSRCTL, psrctl);
}
/* This is useful for sniffing bad packets. */
if (adapter->netdev->features & NETIF_F_RXALL) {
/* UPE and MPE will be handled by normal PROMISC logic
* in e1000e_set_rx_mode */
rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
E1000_RCTL_BAM | /* RX All Bcast Pkts */
E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
E1000_RCTL_DPF | /* Allow filtered pause */
E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
/* Do not mess with E1000_CTRL_VME, it affects transmit as well,
* and that breaks VLANs.
*/
}
ew32(RFCTL, rfctl);
ew32(RCTL, rctl);
/* just started the receive unit, no need to restart */
@ -6005,7 +6024,8 @@ static int e1000_set_features(struct net_device *netdev,
adapter->flags |= FLAG_TSO_FORCE;
if (!(changed & (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX |
NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS)))
NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS |
NETIF_F_RXALL)))
return 0;
/*
@ -6233,6 +6253,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
netdev->hw_features = netdev->features;
netdev->hw_features |= NETIF_F_RXFCS;
netdev->priv_flags |= IFF_SUPP_NOFCS;
netdev->hw_features |= NETIF_F_RXALL;
if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
netdev->features |= NETIF_F_HW_VLAN_FILTER;