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Mon, 22 Sep 2025 10:16:21 +0000 Date: Mon, 22 Sep 2025 12:16:05 +0200 From: Maciej Fijalkowski To: Lorenzo Bianconi CC: Donald Hunter , Jakub Kicinski , "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , "Alexei Starovoitov" , Daniel Borkmann , "Jesper Dangaard Brouer" , John Fastabend , Stanislav Fomichev , Andrew Lunn , Tony Nguyen , Przemek Kitszel , Alexander Lobakin , Andrii Nakryiko , "Martin KaFai Lau" , Eduard Zingerman , "Song Liu" , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , Shuah Khan , , , , Subject: Re: [PATCH RFC bpf-next 4/6] net: ice: Add xmo_rx_checksum callback Message-ID: References: <20250920-xdp-meta-rxcksum-v1-0-35e76a8a84e7@kernel.org> <20250920-xdp-meta-rxcksum-v1-4-35e76a8a84e7@kernel.org> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20250920-xdp-meta-rxcksum-v1-4-35e76a8a84e7@kernel.org> X-ClientProxiedBy: TL0P290CA0008.ISRP290.PROD.OUTLOOK.COM (2603:1096:950:5::19) To DM4PR11MB6117.namprd11.prod.outlook.com (2603:10b6:8:b3::19) Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR11MB6117:EE_|PH3PPFD80FA6330:EE_ X-MS-Office365-Filtering-Correlation-Id: 375bb455-2314-4eb2-3a7f-08ddf9c113ae X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|7416014|376014|7053199007; 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> xdp_init_buff(&ring->xdp, ice_get_frame_sz(ring), &ring->xdp_rxq); > ring->xdp.data = NULL; > ring->xdp_ext.pkt_ctx = &ring->pkt_ctx; > diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h > index 2fd8e78178a271c15fc054ef553bd509b1c8f8f3..96a2bb79e5e95fa0b9c6287eb9769bdecf47dec1 100644 > --- a/drivers/net/ethernet/intel/ice/ice_txrx.h > +++ b/drivers/net/ethernet/intel/ice/ice_txrx.h > @@ -260,6 +260,7 @@ enum ice_rx_dtype { > struct ice_pkt_ctx { > u64 cached_phctime; > __be16 vlan_proto; > + u8 rxq_flags; > }; > > struct ice_xdp_buff { > diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c > index 45cfaabc41cbeb9b119a0e95547e012e0df1e188..5327b0389ec1a3708a469fa9986a1e565b20ecf7 100644 > --- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c > +++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c > @@ -555,6 +555,87 @@ 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, u8 *ip_summed, > + u32 *cksum_meta) Hi Lorenzo, any chance we could have some common code used both here and in ice_rx_csum() ? > +{ > + const struct ice_xdp_buff *xdp_ext = (void *)ctx; > + const union ice_32b_rx_flex_desc *rx_desc = xdp_ext->eop_desc; > + u16 rx_status0, rx_status1, ptype = ice_get_ptype(rx_desc); > + struct libeth_rx_pt decoded = libie_rx_pt_parse(ptype); > + bool ipv4, ipv6; > + > + if (!libeth_rx_pt_has_checksum(xdp_ext->xdp_buff.rxq->dev, decoded)) > + goto checksum_none; > + > + rx_status0 = le16_to_cpu(rx_desc->wb.status_error0); > + rx_status1 = le16_to_cpu(rx_desc->wb.status_error1); > + if ((xdp_ext->pkt_ctx->rxq_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)) { > + const struct ice_32b_rx_flex_desc_nic *desc; > + u16 csum; > + > + desc = (struct ice_32b_rx_flex_desc_nic *)rx_desc; > + *ip_summed = CHECKSUM_COMPLETE; > + csum = (__force u16)desc->raw_csum; > + *cksum_meta = csum_unfold((__force __sum16)swab16(csum)); > + return 0; > + } > + > + /* check if HW has decoded the packet and checksum */ > + if (!(rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_L3L4P_S))) > + goto checksum_none; > + > + ipv4 = libeth_rx_pt_get_ip_ver(decoded) == LIBETH_RX_PT_OUTER_IPV4; > + if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EIPE_S)))) > + goto checksum_none; > + > + if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_IPE_S)))) > + goto checksum_none; > + > + ipv6 = libeth_rx_pt_get_ip_ver(decoded) == LIBETH_RX_PT_OUTER_IPV6; > + if (ipv6 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_IPV6EXADD_S)))) > + goto checksum_none; > + > + /* check for L4 errors and handle packets that were not able to be > + * checksummed due to arrival speed > + */ > + if (rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_L4E_S)) > + goto checksum_none; > + > + /* check for outer UDP checksum error in tunneled packets */ > + if ((rx_status1 & BIT(ICE_RX_FLEX_DESC_STATUS1_NAT_S)) && > + (rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EUDPE_S))) > + goto checksum_none; > + > + /* If there is an outer header present that might contain a checksum > + * 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) > + *cksum_meta = 1; > + > + *ip_summed = CHECKSUM_UNNECESSARY; > + return 0; > + > +checksum_none: > + *ip_summed = CHECKSUM_NONE; > + *cksum_meta = 0; > + > + return 0; > +} > + > /** > * ice_xdp_rx_vlan_tag - VLAN tag XDP hint handler > * @ctx: XDP buff pointer > @@ -584,4 +665,5 @@ 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, > }; > > -- > 2.51.0 > >