Implement xmo_rx_checksum callback in ice driver to report RX checksum result to the eBPF program bounded to the NIC. Introduce ice_get_rx_csum utility routine in order to rx cksum codebase available in ice_rx_csum().
Signed-off-by: Lorenzo Bianconi <[email protected]> --- drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 118 +++++++++++++++++--------- 1 file changed, 76 insertions(+), 42 deletions(-) diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c index 956da38d63b0032db238325dcff818bbd99478e9..65b34b29f396560739fc58293496a5e9ddf09b53 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c @@ -81,69 +81,47 @@ ice_rx_hash_to_skb(const struct ice_rx_ring *rx_ring, libeth_rx_pt_set_hash(skb, hash, decoded); } -/** - * ice_rx_gcs - Set generic checksum in skb - * @skb: skb currently being received and modified - * @rx_desc: receive descriptor - */ -static void ice_rx_gcs(struct sk_buff *skb, - const union ice_32b_rx_flex_desc *rx_desc) -{ - const struct ice_32b_rx_flex_desc_nic *desc; - u16 csum; - - desc = (struct ice_32b_rx_flex_desc_nic *)rx_desc; - skb->ip_summed = CHECKSUM_COMPLETE; - csum = (__force u16)desc->raw_csum; - skb->csum = csum_unfold((__force __sum16)swab16(csum)); -} - -/** - * ice_rx_csum - Indicate in skb if checksum is good - * @ring: the ring we care about - * @skb: skb currently being received and modified - * @rx_desc: the receive descriptor - * @ptype: the packet type decoded by hardware - * - * skb->protocol must be set before this function is called - */ static void -ice_rx_csum(struct ice_rx_ring *ring, struct sk_buff *skb, - union ice_32b_rx_flex_desc *rx_desc, u16 ptype) +ice_get_rx_csum(const union ice_32b_rx_flex_desc *rx_desc, u16 ptype, + struct ice_rx_ring *ring, enum xdp_checksum *ip_summed, + u32 *cksum_meta) { - struct libeth_rx_pt decoded; + struct libeth_rx_pt decoded = libie_rx_pt_parse(ptype); u16 rx_status0, rx_status1; bool ipv4, ipv6; - /* Start with CHECKSUM_NONE and by default csum_level = 0 */ - skb->ip_summed = CHECKSUM_NONE; - - decoded = libie_rx_pt_parse(ptype); if (!libeth_rx_pt_has_checksum(ring->netdev, decoded)) - return; + goto checksum_none; rx_status0 = le16_to_cpu(rx_desc->wb.status_error0); rx_status1 = le16_to_cpu(rx_desc->wb.status_error1); - if ((ring->flags & ICE_RX_FLAGS_RING_GCS) && rx_desc->wb.rxdid == ICE_RXDID_FLEX_NIC && (decoded.inner_prot == LIBETH_RX_PT_INNER_TCP || decoded.inner_prot == LIBETH_RX_PT_INNER_UDP || decoded.inner_prot == LIBETH_RX_PT_INNER_ICMP)) { - ice_rx_gcs(skb, rx_desc); + const struct ice_32b_rx_flex_desc_nic *desc; + __wsum wcsum; + u16 csum; + + desc = (struct ice_32b_rx_flex_desc_nic *)rx_desc; + *ip_summed = XDP_CHECKSUM_COMPLETE; + csum = (__force u16)desc->raw_csum; + wcsum = csum_unfold((__force __sum16)swab16(csum)); + *cksum_meta = (__force u32)wcsum; return; } /* check if HW has decoded the packet and checksum */ if (!(rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_L3L4P_S))) - return; + goto checksum_none; ipv4 = libeth_rx_pt_get_ip_ver(decoded) == LIBETH_RX_PT_OUTER_IPV4; ipv6 = libeth_rx_pt_get_ip_ver(decoded) == LIBETH_RX_PT_OUTER_IPV6; if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EIPE_S)))) { ring->vsi->back->hw_rx_eipe_error++; - return; + goto checksum_none; } if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_IPE_S)))) @@ -167,14 +145,45 @@ ice_rx_csum(struct ice_rx_ring *ring, struct sk_buff *skb, * we need to bump the checksum level by 1 to reflect the fact that * we are indicating we validated the inner checksum. */ - if (decoded.tunnel_type >= LIBETH_RX_PT_TUNNEL_IP_GRENAT) - skb->csum_level = 1; - - skb->ip_summed = CHECKSUM_UNNECESSARY; + *cksum_meta = decoded.tunnel_type >= LIBETH_RX_PT_TUNNEL_IP_GRENAT; + *ip_summed = XDP_CHECKSUM_UNNECESSARY; return; checksum_fail: ring->vsi->back->hw_csum_rx_error++; +checksum_none: + *ip_summed = XDP_CHECKSUM_NONE; + *cksum_meta = 0; +} + +/** + * ice_rx_csum - Indicate in skb if checksum is good + * @ring: the ring we care about + * @skb: skb currently being received and modified + * @rx_desc: the receive descriptor + * @ptype: the packet type decoded by hardware + * + * skb->protocol must be set before this function is called + */ +static void +ice_rx_csum(struct ice_rx_ring *ring, struct sk_buff *skb, + union ice_32b_rx_flex_desc *rx_desc, u16 ptype) +{ + enum xdp_checksum ip_summed; + u32 cksum_meta; + + ice_get_rx_csum(rx_desc, ptype, ring, &ip_summed, &cksum_meta); + switch (ip_summed) { + case XDP_CHECKSUM_UNNECESSARY: + skb->csum_level = cksum_meta; + break; + case XDP_CHECKSUM_COMPLETE: + skb->csum = (__force __wsum)cksum_meta; + break; + default: + break; + } + skb->ip_summed = ip_summed; } /** @@ -569,6 +578,30 @@ static int ice_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash, return 0; } +/** + * ice_xdp_rx_checksum - RX checksum XDP hint handler + * @ctx: XDP buff pointer + * @ip_summed: RX checksum result destination address + * @cksum_meta: XDP RX checksum metadata destination address + * + * Copy RX checksum result (if available) and its metadata to the + * destination address. + */ +static int ice_xdp_rx_checksum(const struct xdp_md *ctx, + enum xdp_checksum *ip_summed, + u32 *cksum_meta) +{ + const struct libeth_xdp_buff *xdp_ext = (void *)ctx; + const union ice_32b_rx_flex_desc *rx_desc = xdp_ext->desc; + struct ice_rx_ring *ring; + + ring = libeth_xdp_buff_to_rq(xdp_ext, typeof(*ring), xdp_rxq); + ice_get_rx_csum(rx_desc, ice_get_ptype(rx_desc), ring, ip_summed, + cksum_meta); + + return 0; +} + /** * ice_xdp_rx_vlan_tag - VLAN tag XDP hint handler * @ctx: XDP buff pointer @@ -601,4 +634,5 @@ const struct xdp_metadata_ops ice_xdp_md_ops = { .xmo_rx_timestamp = ice_xdp_rx_hw_ts, .xmo_rx_hash = ice_xdp_rx_hash, .xmo_rx_vlan_tag = ice_xdp_rx_vlan_tag, + .xmo_rx_checksum = ice_xdp_rx_checksum, }; -- 2.53.0
