From 5f6aa50e4ece6b9464130d819a2caa75c783c603 Mon Sep 17 00:00:00 2001 From: Anirudh Venkataramanan Date: Thu, 28 Feb 2019 15:24:28 -0800 Subject: [PATCH] ice: Add priority information into VLAN header This patch introduces a new function ice_tx_prepare_vlan_flags_dcb to insert 802.1p priority information into the VLAN header Signed-off-by: Anirudh Venkataramanan Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ice/ice_dcb_lib.c | 39 ++++++++++++++++++++ drivers/net/ethernet/intel/ice/ice_dcb_lib.h | 10 +++++ drivers/net/ethernet/intel/ice/ice_txrx.c | 6 +-- drivers/net/ethernet/intel/ice/ice_txrx.h | 2 + 4 files changed, 54 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_lib.c b/drivers/net/ethernet/intel/ice/ice_dcb_lib.c index aabba91189bd..de1e33db761a 100644 --- a/drivers/net/ethernet/intel/ice/ice_dcb_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_dcb_lib.c @@ -359,6 +359,45 @@ dcb_init_err: return err; } +/** + * ice_tx_prepare_vlan_flags_dcb - prepare VLAN tagging for DCB + * @tx_ring: ring to send buffer on + * @first: pointer to struct ice_tx_buf + */ +int +ice_tx_prepare_vlan_flags_dcb(struct ice_ring *tx_ring, + struct ice_tx_buf *first) +{ + struct sk_buff *skb = first->skb; + + if (!test_bit(ICE_FLAG_DCB_ENA, tx_ring->vsi->back->flags)) + return 0; + + /* Insert 802.1p priority into VLAN header */ + if ((first->tx_flags & (ICE_TX_FLAGS_HW_VLAN | ICE_TX_FLAGS_SW_VLAN)) || + skb->priority != TC_PRIO_CONTROL) { + first->tx_flags &= ~ICE_TX_FLAGS_VLAN_PR_M; + /* Mask the lower 3 bits to set the 802.1p priority */ + first->tx_flags |= (skb->priority & 0x7) << + ICE_TX_FLAGS_VLAN_PR_S; + if (first->tx_flags & ICE_TX_FLAGS_SW_VLAN) { + struct vlan_ethhdr *vhdr; + int rc; + + rc = skb_cow_head(skb, 0); + if (rc < 0) + return rc; + vhdr = (struct vlan_ethhdr *)skb->data; + vhdr->h_vlan_TCI = htons(first->tx_flags >> + ICE_TX_FLAGS_VLAN_S); + } else { + first->tx_flags |= ICE_TX_FLAGS_HW_VLAN; + } + } + + return 0; +} + /** * ice_dcb_process_lldp_set_mib_change - Process MIB change * @pf: ptr to ice_pf diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_lib.h b/drivers/net/ethernet/intel/ice/ice_dcb_lib.h index 8932702b0b66..58d8458149c7 100644 --- a/drivers/net/ethernet/intel/ice/ice_dcb_lib.h +++ b/drivers/net/ethernet/intel/ice/ice_dcb_lib.h @@ -12,6 +12,9 @@ u8 ice_dcb_get_ena_tc(struct ice_dcbx_cfg *dcbcfg); u8 ice_dcb_get_num_tc(struct ice_dcbx_cfg *dcbcfg); void ice_vsi_cfg_dcb_rings(struct ice_vsi *vsi); int ice_init_pf_dcb(struct ice_pf *pf); +int +ice_tx_prepare_vlan_flags_dcb(struct ice_ring *tx_ring, + struct ice_tx_buf *first); void ice_dcb_process_lldp_set_mib_change(struct ice_pf *pf, struct ice_rq_event_info *event); @@ -37,6 +40,13 @@ static inline int ice_init_pf_dcb(struct ice_pf *pf) return -EOPNOTSUPP; } +static inline int +ice_tx_prepare_vlan_flags_dcb(struct ice_ring __always_unused *tx_ring, + struct ice_tx_buf __always_unused *first) +{ + return 0; +} + #define ice_vsi_cfg_dcb_rings(vsi) do {} while (0) #define ice_dcb_process_lldp_set_mib_change(pf, event) do {} while (0) #define ice_set_cgd_num(tlan_ctx, ring) do {} while (0) diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c index bd1b27dd29a4..a1dcde49eb99 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx.c @@ -6,6 +6,7 @@ #include #include #include "ice.h" +#include "ice_dcb_lib.h" #define ICE_RX_HDR_SIZE 256 @@ -1798,7 +1799,7 @@ ice_tx_prepare_vlan_flags(struct ice_ring *tx_ring, struct ice_tx_buf *first) * to the encapsulated ethertype. */ skb->protocol = vlan_get_protocol(skb); - goto out; + return 0; } /* if we have a HW VLAN tag being added, default to the HW one */ @@ -1820,8 +1821,7 @@ ice_tx_prepare_vlan_flags(struct ice_ring *tx_ring, struct ice_tx_buf *first) first->tx_flags |= ICE_TX_FLAGS_SW_VLAN; } -out: - return 0; + return ice_tx_prepare_vlan_flags_dcb(tx_ring, first); } /** diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h index 53903f846834..c75d9fd12a68 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.h +++ b/drivers/net/ethernet/intel/ice/ice_txrx.h @@ -45,6 +45,8 @@ #define ICE_TX_FLAGS_HW_VLAN BIT(1) #define ICE_TX_FLAGS_SW_VLAN BIT(2) #define ICE_TX_FLAGS_VLAN_M 0xffff0000 +#define ICE_TX_FLAGS_VLAN_PR_M 0xe0000000 +#define ICE_TX_FLAGS_VLAN_PR_S 29 #define ICE_TX_FLAGS_VLAN_S 16 #define ICE_RX_DMA_ATTR \ -- 2.30.2