From 5db1d364086e235ff4ac2c276538b0cc9b2e6010 Mon Sep 17 00:00:00 2001 From: Moti Haimovsky Date: Thu, 12 Oct 2017 14:29:58 +0200 Subject: [PATCH] net/mlx4: restore Tx checksum offloads This patch adds hardware offloading support for IPv4, UDP and TCP checksum calculation, including inner/outer checksums on supported tunnel types. Signed-off-by: Moti Haimovsky Acked-by: Adrien Mazarguil --- doc/guides/nics/features/mlx4.ini | 4 ++++ drivers/net/mlx4/mlx4.c | 11 +++++++++++ drivers/net/mlx4/mlx4.h | 2 ++ drivers/net/mlx4/mlx4_ethdev.c | 6 ++++++ drivers/net/mlx4/mlx4_prm.h | 2 ++ drivers/net/mlx4/mlx4_rxtx.c | 19 +++++++++++++++++++ drivers/net/mlx4/mlx4_rxtx.h | 2 ++ drivers/net/mlx4/mlx4_txq.c | 2 ++ 8 files changed, 48 insertions(+) diff --git a/doc/guides/nics/features/mlx4.ini b/doc/guides/nics/features/mlx4.ini index 19ae6882a9..366e051fb5 100644 --- a/doc/guides/nics/features/mlx4.ini +++ b/doc/guides/nics/features/mlx4.ini @@ -20,6 +20,10 @@ Multicast MAC filter = Y RSS hash = Y SR-IOV = Y VLAN filter = Y +L3 checksum offload = Y +L4 checksum offload = Y +Inner L3 checksum = Y +Inner L4 checksum = Y Basic stats = Y Stats per queue = Y Other kdrv = Y diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c index 0db9a19775..a297b9a974 100644 --- a/drivers/net/mlx4/mlx4.c +++ b/drivers/net/mlx4/mlx4.c @@ -566,6 +566,17 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev) priv->pd = pd; priv->mtu = ETHER_MTU; priv->vf = vf; + priv->hw_csum = !!(device_attr.device_cap_flags & + IBV_DEVICE_RAW_IP_CSUM); + DEBUG("checksum offloading is %ssupported", + (priv->hw_csum ? "" : "not ")); + /* Only ConnectX-3 Pro supports tunneling. */ + priv->hw_csum_l2tun = + priv->hw_csum && + (device_attr.vendor_part_id == + PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO); + DEBUG("L2 tunnel checksum offloads are %ssupported", + (priv->hw_csum_l2tun ? "" : "not ")); /* Configure the first MAC address by default. */ if (mlx4_get_mac(priv, &mac.addr_bytes)) { ERROR("cannot get MAC address, is mlx4_en loaded?" diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h index f4da8c64e5..e0a98539e8 100644 --- a/drivers/net/mlx4/mlx4.h +++ b/drivers/net/mlx4/mlx4.h @@ -113,6 +113,8 @@ struct priv { uint32_t vf:1; /**< This is a VF device. */ uint32_t intr_alarm:1; /**< An interrupt alarm is scheduled. */ uint32_t isolated:1; /**< Toggle isolated mode. */ + uint32_t hw_csum:1; /* Checksum offload is supported. */ + uint32_t hw_csum_l2tun:1; /* Checksum support for L2 tunnels. */ struct rte_intr_handle intr_handle; /**< Port interrupt handle. */ struct mlx4_drop *drop; /**< Shared resources for drop flow rules. */ LIST_HEAD(, mlx4_rss) rss; /**< Shared targets for Rx flow rules. */ diff --git a/drivers/net/mlx4/mlx4_ethdev.c b/drivers/net/mlx4/mlx4_ethdev.c index 3623909670..a8c0ee2b01 100644 --- a/drivers/net/mlx4/mlx4_ethdev.c +++ b/drivers/net/mlx4/mlx4_ethdev.c @@ -767,6 +767,12 @@ mlx4_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info) info->max_mac_addrs = RTE_DIM(priv->mac); info->rx_offload_capa = 0; info->tx_offload_capa = 0; + if (priv->hw_csum) + info->tx_offload_capa |= (DEV_TX_OFFLOAD_IPV4_CKSUM | + DEV_TX_OFFLOAD_UDP_CKSUM | + DEV_TX_OFFLOAD_TCP_CKSUM); + if (priv->hw_csum_l2tun) + info->tx_offload_capa |= DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM; if (mlx4_get_ifname(priv, &ifname) == 0) info->if_index = if_nametoindex(ifname); info->hash_key_size = MLX4_RSS_HASH_KEY_SIZE; diff --git a/drivers/net/mlx4/mlx4_prm.h b/drivers/net/mlx4/mlx4_prm.h index 085a595d90..df5a6b49b5 100644 --- a/drivers/net/mlx4/mlx4_prm.h +++ b/drivers/net/mlx4/mlx4_prm.h @@ -64,6 +64,8 @@ /* Work queue element (WQE) flags. */ #define MLX4_BIT_WQE_OWN 0x80000000 +#define MLX4_WQE_CTRL_IIP_HDR_CSUM (1 << 28) +#define MLX4_WQE_CTRL_IL4_HDR_CSUM (1 << 27) #define MLX4_SIZE_TO_TXBBS(size) \ (RTE_ALIGN((size), (MLX4_TXBB_SIZE)) >> (MLX4_TXBB_SHIFT)) diff --git a/drivers/net/mlx4/mlx4_rxtx.c b/drivers/net/mlx4/mlx4_rxtx.c index cc0baaac62..fe7d5d08e4 100644 --- a/drivers/net/mlx4/mlx4_rxtx.c +++ b/drivers/net/mlx4/mlx4_rxtx.c @@ -431,6 +431,25 @@ mlx4_post_send(struct txq *txq, struct rte_mbuf *pkt) } else { srcrb_flags = RTE_BE32(MLX4_WQE_CTRL_SOLICIT); } + /* Enable HW checksum offload if requested */ + if (txq->csum && + (pkt->ol_flags & + (PKT_TX_IP_CKSUM | PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM))) { + const uint64_t is_tunneled = (pkt->ol_flags & + (PKT_TX_TUNNEL_GRE | + PKT_TX_TUNNEL_VXLAN)); + + if (is_tunneled && txq->csum_l2tun) { + owner_opcode |= MLX4_WQE_CTRL_IIP_HDR_CSUM | + MLX4_WQE_CTRL_IL4_HDR_CSUM; + if (pkt->ol_flags & PKT_TX_OUTER_IP_CKSUM) + srcrb_flags |= + RTE_BE32(MLX4_WQE_CTRL_IP_HDR_CSUM); + } else { + srcrb_flags |= RTE_BE32(MLX4_WQE_CTRL_IP_HDR_CSUM | + MLX4_WQE_CTRL_TCP_UDP_CSUM); + } + } ctrl->srcrb_flags = srcrb_flags; /* * Make sure descriptor is fully written before diff --git a/drivers/net/mlx4/mlx4_rxtx.h b/drivers/net/mlx4/mlx4_rxtx.h index fa5738f232..6c88efb788 100644 --- a/drivers/net/mlx4/mlx4_rxtx.h +++ b/drivers/net/mlx4/mlx4_rxtx.h @@ -124,6 +124,8 @@ struct txq { struct txq_elt (*elts)[]; /**< Tx elements. */ struct mlx4_txq_stats stats; /**< Tx queue counters. */ uint32_t max_inline; /**< Max inline send size. */ + uint32_t csum:1; /**< Enable checksum offloading. */ + uint32_t csum_l2tun:1; /**< Same for L2 tunnels. */ uint8_t *bounce_buf; /**< Memory used for storing the first DWORD of data TXBBs. */ struct { diff --git a/drivers/net/mlx4/mlx4_txq.c b/drivers/net/mlx4/mlx4_txq.c index fbb028ad83..0e27df2c92 100644 --- a/drivers/net/mlx4/mlx4_txq.c +++ b/drivers/net/mlx4/mlx4_txq.c @@ -276,6 +276,8 @@ mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc, RTE_MIN(MLX4_PMD_TX_PER_COMP_REQ, desc / 4), .elts_comp_cd_init = RTE_MIN(MLX4_PMD_TX_PER_COMP_REQ, desc / 4), + .csum = priv->hw_csum, + .csum_l2tun = priv->hw_csum_l2tun, .bounce_buf = bounce_buf, }; txq->cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0); -- 2.20.1