Add support for extracting RSS hash values and hash types from hardware completion descriptors in XDP programs for bnxt_en.
Add IP_TYPE definition for determining if completion is ipv4 or ipv6. In addition add ITYPE_ICMP flag for identifying ICMP completions. Signed-off-by: Chris J Arges <[email protected]> Reviewed-by: Joe Damato <[email protected]> Reviewed-by: Andy Gospodarek <[email protected]> --- v4: no changes v5: no changes --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 5 ++ drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 + drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c | 47 +++++++++++++++++++ drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h | 3 ++ 4 files changed, 57 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index e70fd04fe5f3..d15548dfd4a3 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -15911,6 +15911,10 @@ static const struct net_device_ops bnxt_netdev_ops = { .ndo_hwtstamp_set = bnxt_hwtstamp_set, }; +static const struct xdp_metadata_ops bnxt_xdp_metadata_ops = { + .xmo_rx_hash = bnxt_xdp_rx_hash, +}; + static void bnxt_get_queue_stats_rx(struct net_device *dev, int i, struct netdev_queue_stats_rx *stats) { @@ -16795,6 +16799,7 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) goto init_err_free; dev->netdev_ops = &bnxt_netdev_ops; + dev->xdp_metadata_ops = &bnxt_xdp_metadata_ops; dev->stat_ops = &bnxt_stat_ops; dev->watchdog_timeo = BNXT_TX_TIMEOUT; dev->ethtool_ops = &bnxt_ethtool_ops; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index dd0f6743acf5..99f45686ed09 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -232,6 +232,7 @@ struct rx_cmp { #define RX_CMP_FLAGS_ITYPE_UDP (3 << 12) #define RX_CMP_FLAGS_ITYPE_FCOE (4 << 12) #define RX_CMP_FLAGS_ITYPE_ROCE (5 << 12) + #define RX_CMP_FLAGS_ITYPE_ICMP (7 << 12) #define RX_CMP_FLAGS_ITYPE_PTP_WO_TS (8 << 12) #define RX_CMP_FLAGS_ITYPE_PTP_W_TS (9 << 12) #define RX_CMP_LEN (0xffff << 16) @@ -311,6 +312,7 @@ struct rx_cmp_ext { #define RX_CMP_FLAGS2_T_IP_CS_CALC (0x1 << 2) #define RX_CMP_FLAGS2_T_L4_CS_CALC (0x1 << 3) #define RX_CMP_FLAGS2_META_FORMAT_VLAN (0x1 << 4) + #define RX_CMP_FLAGS2_IP_TYPE (0x1 << 8) __le32 rx_cmp_meta_data; #define RX_CMP_FLAGS2_METADATA_TCI_MASK 0xffff #define RX_CMP_FLAGS2_METADATA_VID_MASK 0xfff diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c index 85cbeb35681c..1f920464b426 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c @@ -472,3 +472,50 @@ bnxt_xdp_build_skb(struct bnxt *bp, struct sk_buff *skb, u8 num_frags, xdp_buff_get_skb_flags(xdp)); return skb; } + +int bnxt_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash, + enum xdp_rss_hash_type *rss_type) +{ + const struct bnxt_xdp_buff *xdp = (void *)ctx; + const struct rx_cmp_ext *rxcmp1 = xdp->rxcmp1; + const struct rx_cmp *rxcmp = xdp->rxcmp; + enum xdp_rss_hash_type hash_type = 0; + u32 itypes; + + if (!rxcmp || !RX_CMP_HASH_VALID(rxcmp)) + return -ENODATA; + + *hash = le32_to_cpu(rxcmp->rx_cmp_rss_hash); + + if (!rxcmp1) { + *rss_type = XDP_RSS_TYPE_L2; + return 0; + } + + if (xdp->cmp_type == CMP_TYPE_RX_L2_CMP) { + itypes = RX_CMP_ITYPES(rxcmp); + if (rxcmp1->rx_cmp_flags2 & + cpu_to_le32(RX_CMP_FLAGS2_IP_TYPE)) { + hash_type |= XDP_RSS_TYPE_L3_IPV6; + } else { + hash_type |= XDP_RSS_TYPE_L3_IPV4; + } + + switch (itypes) { + case RX_CMP_FLAGS_ITYPE_TCP: + hash_type |= XDP_RSS_L4 | XDP_RSS_L4_TCP; + break; + case RX_CMP_FLAGS_ITYPE_UDP: + hash_type |= XDP_RSS_L4 | XDP_RSS_L4_UDP; + break; + case RX_CMP_FLAGS_ITYPE_ICMP: + hash_type |= XDP_RSS_L4 | XDP_RSS_L4_ICMP; + break; + default: + break; + } + } + + *rss_type = hash_type; + return 0; +} diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h index 8c66698bde11..fb4f9143929f 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h @@ -41,4 +41,7 @@ void bnxt_xdp_buff_frags_free(struct bnxt_rx_ring_info *rxr, struct sk_buff *bnxt_xdp_build_skb(struct bnxt *bp, struct sk_buff *skb, u8 num_frags, struct bnxt_rx_ring_info *rxr, struct xdp_buff *xdp); +int bnxt_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash, + enum xdp_rss_hash_type *rss_type); + #endif -- 2.43.0
