From mboxrd@z Thu Jan 1 00:00:00 1970 From: greearb@candelatech.com Subject: [PATCH v3 11/16] e1000: Support RX-ALL flag. Date: Fri, 10 Feb 2012 17:04:29 -0800 Message-ID: <1328922274-23993-12-git-send-email-greearb@candelatech.com> References: <1328922274-23993-1-git-send-email-greearb@candelatech.com> Cc: Ben Greear To: netdev@vger.kernel.org Return-path: Received: from mail.candelatech.com ([208.74.158.172]:55880 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761219Ab2BKBGW (ORCPT ); Fri, 10 Feb 2012 20:06:22 -0500 In-Reply-To: <1328922274-23993-1-git-send-email-greearb@candelatech.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Ben Greear This allows the NIC to receive errored frames (bad FCS, etc) and pass them up the stack. This can be useful when using sniffers. Signed-off-by: Ben Greear --- :100644 100644 64b73bc... 59b8207... M drivers/net/ethernet/intel/e1000/e1000_main.c drivers/net/ethernet/intel/e1000/e1000_main.c | 26 ++++++++++++++++++++++++- 1 files changed, 25 insertions(+), 1 deletions(-) diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c index 64b73bc..59b8207 100644 --- a/drivers/net/ethernet/intel/e1000/e1000_main.c +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c @@ -824,9 +824,10 @@ static int e1000_set_features(struct net_device *netdev, if (changed & NETIF_F_HW_VLAN_RX) e1000_vlan_mode(netdev, features); - if (!(changed & NETIF_F_RXCSUM)) + if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL))) return 0; + netdev->features = features; adapter->rx_csum = !!(features & NETIF_F_RXCSUM); if (netif_running(netdev)) @@ -1071,6 +1072,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev, netdev->features |= netdev->hw_features; netdev->hw_features |= NETIF_F_RXCSUM; + netdev->hw_features |= NETIF_F_RXALL; if (pci_using_dac) { netdev->features |= NETIF_F_HIGHDMA; @@ -1837,6 +1839,22 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter) break; } + /* 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(RCTL, rctl); } @@ -4066,6 +4084,8 @@ static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, irq_flags); length--; } else { + if (netdev->features & NETIF_F_RXALL) + goto process_skb; /* recycle both page and skb */ buffer_info->skb = skb; /* an error means any chain goes out the window @@ -4078,6 +4098,7 @@ static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, } #define rxtop rx_ring->rx_skb_top +process_skb: if (!(status & E1000_RXD_STAT_EOP)) { /* this descriptor is only the beginning (or middle) */ if (!rxtop) { @@ -4288,12 +4309,15 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, flags); length--; } else { + if (netdev->features & NETIF_F_RXALL) + goto process_skb; /* recycle */ buffer_info->skb = skb; goto next_desc; } } +process_skb: /* adjust length to remove Ethernet CRC, this must be * done after the TBI_ACCEPT workaround above */ length -= 4; -- 1.7.3.4