From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Kirsher Subject: [net-next 08/12] igb: Add workaround for byte swapped VLAN on i350 local traffic Date: Tue, 11 Oct 2011 20:38:24 -0700 Message-ID: <1318390708-12232-9-git-send-email-jeffrey.t.kirsher@intel.com> References: <1318390708-12232-1-git-send-email-jeffrey.t.kirsher@intel.com> Cc: Alexander Duyck , netdev@vger.kernel.org, gospo@redhat.com, sassmann@redhat.com, Jeff Kirsher To: davem@davemloft.net Return-path: Received: from mga11.intel.com ([192.55.52.93]:34679 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751256Ab1JLDio (ORCPT ); Tue, 11 Oct 2011 23:38:44 -0400 In-Reply-To: <1318390708-12232-1-git-send-email-jeffrey.t.kirsher@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Alexander Duyck On i350 when traffic is looped back from a VF to the PF the value is byte swapped from the normal format. In order to address this we need to add a flag indicating that the ring will need to byte swap the loopback packets prior to processing them. Signed-off-by: Alexander Duyck Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/e1000_defines.h | 1 + drivers/net/ethernet/intel/igb/igb.h | 1 + drivers/net/ethernet/intel/igb/igb_main.c | 29 +++++++++++++++++++----- 3 files changed, 25 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/intel/igb/e1000_defines.h b/drivers/net/ethernet/intel/igb/e1000_defines.h index 68558be..f5fc572 100644 --- a/drivers/net/ethernet/intel/igb/e1000_defines.h +++ b/drivers/net/ethernet/intel/igb/e1000_defines.h @@ -85,6 +85,7 @@ #define E1000_RXD_STAT_TCPCS 0x20 /* TCP xsum calculated */ #define E1000_RXD_STAT_TS 0x10000 /* Pkt was time stamped */ +#define E1000_RXDEXT_STATERR_LB 0x00040000 #define E1000_RXDEXT_STATERR_CE 0x01000000 #define E1000_RXDEXT_STATERR_SE 0x02000000 #define E1000_RXDEXT_STATERR_SEQ 0x04000000 diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h index 5def94c..e6e770d 100644 --- a/drivers/net/ethernet/intel/igb/igb.h +++ b/drivers/net/ethernet/intel/igb/igb.h @@ -243,6 +243,7 @@ struct igb_ring { enum e1000_ring_flags_t { IGB_RING_FLAG_RX_SCTP_CSUM, + IGB_RING_FLAG_RX_LB_VLAN_BSWAP, IGB_RING_FLAG_TX_CTX_IDX, IGB_RING_FLAG_TX_DETECT_HANG }; diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 43caf84..7c6e526 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -712,6 +712,11 @@ static int igb_alloc_queues(struct igb_adapter *adapter) /* set flag indicating ring supports SCTP checksum offload */ if (adapter->hw.mac.type >= e1000_82576) set_bit(IGB_RING_FLAG_RX_SCTP_CSUM, &ring->flags); + + /* On i350, loopback VLAN packets have the tag byte-swapped. */ + if (adapter->hw.mac.type == e1000_i350) + set_bit(IGB_RING_FLAG_RX_LB_VLAN_BSWAP, &ring->flags); + adapter->rx_ring[i] = ring; } @@ -5794,6 +5799,23 @@ static void igb_rx_hwtstamp(struct igb_q_vector *q_vector, igb_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval); } + +static void igb_rx_vlan(struct igb_ring *ring, + union e1000_adv_rx_desc *rx_desc, + struct sk_buff *skb) +{ + if (igb_test_staterr(rx_desc, E1000_RXD_STAT_VP)) { + u16 vid; + if (igb_test_staterr(rx_desc, E1000_RXDEXT_STATERR_LB) && + test_bit(IGB_RING_FLAG_RX_LB_VLAN_BSWAP, &ring->flags)) + vid = be16_to_cpu(rx_desc->wb.upper.vlan); + else + vid = le16_to_cpu(rx_desc->wb.upper.vlan); + + __vlan_hwaccel_put_tag(skb, vid); + } +} + static inline u16 igb_get_hlen(union e1000_adv_rx_desc *rx_desc) { /* HW will not DMA in data larger than the given buffer, even if it @@ -5890,12 +5912,7 @@ static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, int budget) igb_rx_hwtstamp(q_vector, rx_desc, skb); igb_rx_hash(rx_ring, rx_desc, skb); igb_rx_checksum(rx_ring, rx_desc, skb); - - if (igb_test_staterr(rx_desc, E1000_RXD_STAT_VP)) { - u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan); - - __vlan_hwaccel_put_tag(skb, vid); - } + igb_rx_vlan(rx_ring, rx_desc, skb); total_bytes += skb->len; total_packets++; -- 1.7.6.4