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Mon, 03 Mar 2025 05:25:20 -0500 X-MC-Unique: STtjK2HuNryqBqfPHnOfUw-1 X-Mimecast-MFC-AGG-ID: STtjK2HuNryqBqfPHnOfUw_1740997519 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4C2C71800987; Mon, 3 Mar 2025 10:25:19 +0000 (UTC) Received: from [10.45.242.27] (unknown [10.45.242.27]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 664B61800352; Mon, 3 Mar 2025 10:25:16 +0000 (UTC) Message-ID: Date: Mon, 3 Mar 2025 11:25:13 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [EXTERNAL] Re: [PATCH v2] net/virtio: add virtio hash report feature To: Shiva Shankar Kommula , "dev@dpdk.org" , "chenbox@nvidia.com" Cc: "david.marchand@redhat.com" , Jerin Jacob , Nithin Kumar Dabilpuram , Srujana Challa References: <20250126193404.3431544-1-kshankar@marvell.com> <20250127074150.3499851-1-kshankar@marvell.com> From: Maxime Coquelin Autocrypt: addr=maxime.coquelin@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org On 2/27/25 10:44 AM, Shiva Shankar Kommula wrote: >> -----Original Message----- >> From: Maxime Coquelin >> Sent: Tuesday, February 25, 2025 9:39 PM >> To: Shiva Shankar Kommula ; dev@dpdk.org; >> chenbox@nvidia.com >> Cc: david.marchand@redhat.com; Jerin Jacob ; Nithin >> Kumar Dabilpuram ; Srujana Challa >> >> Subject: [EXTERNAL] Re: [PATCH v2] net/virtio: add virtio hash report feature >> >> Hi, On 1/27/25 8: 41 AM, Kommula Shiva Shankar wrote: > This patch adds >> virtio hash report feature, which is > supported in packet queue mode with >> scalar version Why only restrict to packed ring? isn't it also compatible with >> split ring? >> >> Hi, >> >> On 1/27/25 8:41 AM, Kommula Shiva Shankar wrote: >>> This patch adds virtio hash report feature, which is supported in >>> packet queue mode with scalar version >> >> Why only restrict to packed ring? isn't it also compatible with split ring? > Hi Maxim, > Yes, it is. I can add split ring support later if it's alright. Ok, I checked the split path and it should not break. But please add its support in next release. I see one thing missing in virtio_ethdev.c: int eth_virtio_dev_init(struct rte_eth_dev *eth_dev) { struct virtio_hw *hw = eth_dev->data->dev_private; uint32_t speed = RTE_ETH_SPEED_NUM_UNKNOWN; int vectorized = 0; int ret; if (sizeof(struct virtio_net_hdr_mrg_rxbuf) > RTE_PKTMBUF_HEADROOM) { PMD_INIT_LOG(ERR, "Not sufficient headroom required = %d, avail = %d", (int)sizeof(struct virtio_net_hdr_mrg_rxbuf), RTE_PKTMBUF_HEADROOM); return -1; } It should now be checked against virtio_net_hdr_hash_report struct size. Regards, Maxime >> >>> >>> Signed-off-by: Kommula Shiva Shankar >>> --- >>> drivers/net/virtio/virtio.h | 2 ++ >>> drivers/net/virtio/virtio_ethdev.c | 20 ++++++++++++- >>> drivers/net/virtio/virtio_ethdev.h | 1 + >>> drivers/net/virtio/virtio_rxtx.c | 30 +++++++++++++++++++ >>> .../net/virtio/virtio_user/virtio_user_dev.c | 1 + >>> drivers/net/virtio/virtqueue.h | 21 +++++++++++++ >>> 6 files changed, 74 insertions(+), 1 deletion(-) >>> >>> diff --git a/drivers/net/virtio/virtio.h b/drivers/net/virtio/virtio.h >>> index ef5827c5f5..c2a0fd477c 100644 >>> --- a/drivers/net/virtio/virtio.h >>> +++ b/drivers/net/virtio/virtio.h >>> @@ -30,6 +30,7 @@ >>> #define VIRTIO_NET_F_GUEST_ANNOUNCE 21 /* Guest can >> announce device on the network */ >>> #define VIRTIO_NET_F_MQ 22 /* Device supports Receive >> Flow Steering */ >>> #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ >>> +#define VIRTIO_NET_F_HASH_REPORT 57 /* Supports hash report */ >>> #define VIRTIO_NET_F_RSS 60 /* RSS supported */ >>> >>> /* >>> @@ -187,6 +188,7 @@ struct virtio_hw { >>> uint8_t started; >>> uint8_t weak_barriers; >>> uint8_t vlan_strip; >>> + uint8_t has_hash_report; >>> bool rx_ol_scatter; >>> uint8_t has_tx_offload; >>> uint8_t has_rx_offload; >>> diff --git a/drivers/net/virtio/virtio_ethdev.c >>> b/drivers/net/virtio/virtio_ethdev.c >>> index 70d4839def..caacbce57a 100644 >>> --- a/drivers/net/virtio/virtio_ethdev.c >>> +++ b/drivers/net/virtio/virtio_ethdev.c >>> @@ -1796,7 +1796,9 @@ virtio_init_device(struct rte_eth_dev *eth_dev, >> uint64_t req_features) >>> eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC; >>> >>> /* Setting up rx_header size for the device */ >>> - if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) || >>> + if (virtio_with_feature(hw, VIRTIO_NET_F_HASH_REPORT)) >>> + hw->vtnet_hdr_size = sizeof(struct >> virtio_net_hdr_hash_report); >>> + else if (virtio_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) || >>> virtio_with_feature(hw, VIRTIO_F_VERSION_1) || >>> virtio_with_packed_queue(hw)) >>> hw->vtnet_hdr_size = sizeof(struct >> virtio_net_hdr_mrg_rxbuf); @@ >>> -2181,6 +2183,10 @@ virtio_dev_configure(struct rte_eth_dev *dev) >>> (1ULL << VIRTIO_NET_F_GUEST_TSO4) | >>> (1ULL << VIRTIO_NET_F_GUEST_TSO6); >>> >>> + if (rx_offloads & RTE_ETH_RX_OFFLOAD_RSS_HASH) >>> + req_features |= >>> + (1ULL << VIRTIO_NET_F_HASH_REPORT); >>> + >>> if (tx_offloads & (RTE_ETH_TX_OFFLOAD_UDP_CKSUM | >>> RTE_ETH_TX_OFFLOAD_TCP_CKSUM)) >>> req_features |= (1ULL << VIRTIO_NET_F_CSUM); @@ -2233,6 >> +2239,9 @@ >>> virtio_dev_configure(struct rte_eth_dev *dev) >>> if (rx_offloads & RTE_ETH_RX_OFFLOAD_VLAN_STRIP) >>> hw->vlan_strip = 1; >>> >>> + if (rx_offloads & RTE_ETH_RX_OFFLOAD_RSS_HASH) >>> + hw->has_hash_report = 1; >>> + >>> hw->rx_ol_scatter = (rx_offloads & RTE_ETH_RX_OFFLOAD_SCATTER); >>> >>> if ((rx_offloads & RTE_ETH_RX_OFFLOAD_VLAN_FILTER) && @@ - >> 2285,6 >>> +2294,12 @@ virtio_dev_configure(struct rte_eth_dev *dev) >>> "disabled packed ring vectorized rx for >> TCP_LRO enabled"); >>> hw->use_vec_rx = 0; >>> } >>> + >>> + if (rx_offloads & RTE_ETH_RX_OFFLOAD_RSS_HASH) { >>> + PMD_DRV_LOG(INFO, >>> + "disabled packed ring vectorized rx for >> RSS_HASH enabled"); >>> + hw->use_vec_rx = 0; >>> + } >>> } >>> } else { >>> if (virtio_with_feature(hw, VIRTIO_F_IN_ORDER)) { @@ - >> 2669,6 >>> +2684,9 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct >> rte_eth_dev_info *dev_info) >>> dev_info->flow_type_rss_offloads = 0; >>> } >>> >>> + if (host_features & (1ULL << VIRTIO_NET_F_HASH_REPORT)) >>> + dev_info->rx_offload_capa |= >> RTE_ETH_RX_OFFLOAD_RSS_HASH; >>> + >>> if (host_features & (1ULL << VIRTIO_F_RING_PACKED)) { >>> /* >>> * According to 2.7 Packed Virtqueues, diff --git >>> a/drivers/net/virtio/virtio_ethdev.h >>> b/drivers/net/virtio/virtio_ethdev.h >>> index 7be1c9acd0..7aa771fd2b 100644 >>> --- a/drivers/net/virtio/virtio_ethdev.h >>> +++ b/drivers/net/virtio/virtio_ethdev.h >>> @@ -46,6 +46,7 @@ >>> 1u << VIRTIO_NET_F_CSUM | \ >>> 1u << VIRTIO_NET_F_HOST_TSO4 | \ >>> 1u << VIRTIO_NET_F_HOST_TSO6 | \ >>> + 1ULL << VIRTIO_NET_F_HASH_REPORT | \ >>> 1ULL << VIRTIO_NET_F_RSS) >>> >>> extern const struct eth_dev_ops virtio_user_secondary_eth_dev_ops; >>> diff --git a/drivers/net/virtio/virtio_rxtx.c >>> b/drivers/net/virtio/virtio_rxtx.c >>> index b67f063b31..35bd61350c 100644 >>> --- a/drivers/net/virtio/virtio_rxtx.c >>> +++ b/drivers/net/virtio/virtio_rxtx.c >>> @@ -40,6 +40,19 @@ >>> #define VIRTIO_DUMP_PACKET(m, len) do { } while (0) >>> #endif >>> >>> +static const uint32_t vhdr_hash_report_to_mbuf_pkt_type[] = { >>> + RTE_PTYPE_UNKNOWN, >>> + RTE_PTYPE_L3_IPV4, >>> + RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_TCP, >>> + RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L4_UDP, >>> + RTE_PTYPE_L3_IPV6, >>> + RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_TCP, >>> + RTE_PTYPE_L3_IPV6 | RTE_PTYPE_L4_UDP, >>> + RTE_PTYPE_L3_IPV6_EXT, >>> + RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_L4_TCP, >>> + RTE_PTYPE_L3_IPV6_EXT | RTE_PTYPE_L4_UDP, }; >>> + >>> void >>> vq_ring_free_inorder(struct virtqueue *vq, uint16_t desc_idx, uint16_t >> num) >>> { >>> @@ -901,6 +914,16 @@ virtio_discard_rxbuf_inorder(struct virtqueue *vq, >> struct rte_mbuf *m) >>> } >>> } >>> >>> +static inline void >>> +virtio_rx_update_hash_report(struct rte_mbuf *m, struct >>> +virtio_net_hdr_hash_report *hdr) { >>> + if (likely(hdr->hash_report)) { >>> + m->packet_type = vhdr_hash_report_to_mbuf_pkt_type[hdr- >>> hash_report]; >>> + m->hash.rss = hdr->hash_value; >>> + m->ol_flags |= RTE_MBUF_F_RX_RSS_HASH; >>> + } >>> +} >>> + >>> /* Optionally fill offload information in structure */ >>> static inline int >>> virtio_rx_offload(struct rte_mbuf *m, struct virtio_net_hdr *hdr) @@ >>> -1134,6 +1157,9 @@ virtio_recv_pkts_packed(void *rx_queue, struct >> rte_mbuf **rx_pkts, >>> hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr + >>> RTE_PKTMBUF_HEADROOM - hdr_size); >>> >>> + if (hw->has_hash_report) >>> + virtio_rx_update_hash_report(rxm, >>> + (struct >> virtio_net_hdr_hash_report *)hdr); >>> if (hw->vlan_strip) >>> rte_vlan_strip(rxm); >>> >>> @@ -1617,6 +1643,10 @@ virtio_recv_mergeable_pkts_packed(void >> *rx_queue, >>> if (hw->vlan_strip) >>> rte_vlan_strip(rx_pkts[nb_rx]); >>> >>> + if (hw->has_hash_report) >>> + virtio_rx_update_hash_report(rxm, >>> + (struct >> virtio_net_hdr_hash_report *)header); >>> + >>> seg_res = seg_num - 1; >>> >>> /* Merge remaining segments */ >>> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c >>> b/drivers/net/virtio/virtio_user/virtio_user_dev.c >>> index 2997d2bd26..187f81b066 100644 >>> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c >>> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c >>> @@ -726,6 +726,7 @@ virtio_user_free_vrings(struct virtio_user_dev *dev) >>> 1ULL << VIRTIO_F_RING_PACKED | \ >>> 1ULL << VIRTIO_F_NOTIFICATION_DATA | \ >>> 1ULL << VIRTIO_F_ORDER_PLATFORM | \ >>> + 1ULL << VIRTIO_NET_F_HASH_REPORT | \ >>> 1ULL << VIRTIO_NET_F_RSS) >>> >>> int >>> diff --git a/drivers/net/virtio/virtqueue.h >>> b/drivers/net/virtio/virtqueue.h index 60211a40c9..3b468bd4f4 100644 >>> --- a/drivers/net/virtio/virtqueue.h >>> +++ b/drivers/net/virtio/virtqueue.h >>> @@ -257,6 +257,27 @@ struct virtio_net_hdr_mrg_rxbuf { >>> uint16_t num_buffers; /**< Number of merged rx buffers */ >>> }; >>> >>> +/** >>> + * This is the version of the header to use when the HASH_REPORT >>> + * feature has been negotiated. >>> + */ >>> +struct virtio_net_hdr_hash_report { >>> + struct virtio_net_hdr_mrg_rxbuf hdr; >>> + uint32_t hash_value; >>> +#define VIRTIO_NET_HASH_REPORT_NONE 0 >>> +#define VIRTIO_NET_HASH_REPORT_IPV4 1 >>> +#define VIRTIO_NET_HASH_REPORT_TCPV4 2 >>> +#define VIRTIO_NET_HASH_REPORT_UDPV4 3 >>> +#define VIRTIO_NET_HASH_REPORT_IPV6 4 >>> +#define VIRTIO_NET_HASH_REPORT_TCPV6 5 >>> +#define VIRTIO_NET_HASH_REPORT_UDPV6 6 >>> +#define VIRTIO_NET_HASH_REPORT_IPV6_EX 7 >>> +#define VIRTIO_NET_HASH_REPORT_TCPV6_EX 8 >>> +#define VIRTIO_NET_HASH_REPORT_UDPV6_EX 9 >>> + uint16_t hash_report; >>> + uint16_t pad_reserved; >>> +}; >>> + >>> /* Region reserved to allow for transmit header and indirect ring */ >>> #define VIRTIO_MAX_TX_INDIRECT 8 >>> struct virtio_tx_region { >