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([2a09:bac1:76c0:540::22f:7d]) by smtp.gmail.com with ESMTPSA id 5614622812f47-467342fab49sm5408516b6e.16.2026.03.13.15.30.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Mar 2026 15:30:54 -0700 (PDT) From: Chris J Arges To: Joe Damato , Jakub Kicinski , Andy Gospodarek , Michael Chan , Pavan Chebbi , Andrew Lunn , "David S. Miller" , Eric Dumazet , Paolo Abeni , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev Cc: Chris J Arges , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH net-next v4 2/6] bnxt_en: Implement XDP RSS hash metadata extraction Date: Fri, 13 Mar 2026 17:27:32 -0500 Message-ID: <20260313223029.454755-3-carges@cloudflare.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260313223029.454755-1-carges@cloudflare.com> References: <20260313223029.454755-1-carges@cloudflare.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Joe Damato Reviewed-by: Andy Gospodarek --- v4: 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/ethern= et/broadcom/bnxt/bnxt.c index 1b170b9cf461..4881d9359549 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -15906,6 +15906,10 @@ static const struct net_device_ops bnxt_netdev_ops= =3D { .ndo_hwtstamp_set =3D bnxt_hwtstamp_set, }; =20 +static const struct xdp_metadata_ops bnxt_xdp_metadata_ops =3D { + .xmo_rx_hash =3D bnxt_xdp_rx_hash, +}; + static void bnxt_get_queue_stats_rx(struct net_device *dev, int i, struct netdev_queue_stats_rx *stats) { @@ -16790,6 +16794,7 @@ static int bnxt_init_one(struct pci_dev *pdev, cons= t struct pci_device_id *ent) goto init_err_free; =20 dev->netdev_ops =3D &bnxt_netdev_ops; + dev->xdp_metadata_ops =3D &bnxt_xdp_metadata_ops; dev->stat_ops =3D &bnxt_stat_ops; dev->watchdog_timeo =3D BNXT_TX_TIMEOUT; dev->ethtool_ops =3D &bnxt_ethtool_ops; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethern= et/broadcom/bnxt/bnxt.h index 90fa3e93c8d6..34bb98709f2b 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/et= hernet/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 *sk= b, 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 =3D (void *)ctx; + const struct rx_cmp_ext *rxcmp1 =3D xdp->rxcmp1; + const struct rx_cmp *rxcmp =3D xdp->rxcmp; + enum xdp_rss_hash_type hash_type =3D 0; + u32 itypes; + + if (!rxcmp || !RX_CMP_HASH_VALID(rxcmp)) + return -ENODATA; + + *hash =3D le32_to_cpu(rxcmp->rx_cmp_rss_hash); + + if (!rxcmp1) { + *rss_type =3D XDP_RSS_TYPE_L2; + return 0; + } + + if (xdp->cmp_type =3D=3D CMP_TYPE_RX_L2_CMP) { + itypes =3D RX_CMP_ITYPES(rxcmp); + if (rxcmp1->rx_cmp_flags2 & + cpu_to_le32(RX_CMP_FLAGS2_IP_TYPE)) { + hash_type |=3D XDP_RSS_TYPE_L3_IPV6; + } else { + hash_type |=3D XDP_RSS_TYPE_L3_IPV4; + } + + switch (itypes) { + case RX_CMP_FLAGS_ITYPE_TCP: + hash_type |=3D XDP_RSS_L4 | XDP_RSS_L4_TCP; + break; + case RX_CMP_FLAGS_ITYPE_UDP: + hash_type |=3D XDP_RSS_L4 | XDP_RSS_L4_UDP; + break; + case RX_CMP_FLAGS_ITYPE_ICMP: + hash_type |=3D XDP_RSS_L4 | XDP_RSS_L4_ICMP; + break; + default: + break; + } + } + + *rss_type =3D hash_type; + return 0; +} diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h b/drivers/net/et= hernet/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 *r= xr, 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 --=20 2.43.0