From 4899185ff9dafa4e6ef9d7314784926cf7f6ad41 Mon Sep 17 00:00:00 2001 From: Nelio Laranjeiro Date: Thu, 12 Jul 2018 11:30:54 +0200 Subject: [PATCH] net/mlx5: add flow IPv4 item Signed-off-by: Nelio Laranjeiro Acked-by: Yongseok Koh --- drivers/net/mlx5/mlx5_flow.c | 90 ++++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c index 659979283d..c05b8498de 100644 --- a/drivers/net/mlx5/mlx5_flow.c +++ b/drivers/net/mlx5/mlx5_flow.c @@ -506,6 +506,93 @@ mlx5_flow_item_vlan(const struct rte_flow_item *item, struct rte_flow *flow, return size; } +/** + * Convert the @p item into a Verbs specification after ensuring the NIC + * will understand and process it correctly. + * If the necessary size for the conversion is greater than the @p flow_size, + * nothing is written in @p flow, the validation is still performed. + * + * @param[in] item + * Item specification. + * @param[in, out] flow + * Pointer to flow structure. + * @param[in] flow_size + * Size in bytes of the available space in @p flow, if too small, nothing is + * written. + * @param[out] error + * Pointer to error structure. + * + * @return + * On success the number of bytes consumed/necessary, if the returned value + * is lesser or equal to @p flow_size, the @p item has fully been converted, + * otherwise another call with this returned memory size should be done. + * On error, a negative errno value is returned and rte_errno is set. + */ +static int +mlx5_flow_item_ipv4(const struct rte_flow_item *item, struct rte_flow *flow, + const size_t flow_size, struct rte_flow_error *error) +{ + const struct rte_flow_item_ipv4 *spec = item->spec; + const struct rte_flow_item_ipv4 *mask = item->mask; + const struct rte_flow_item_ipv4 nic_mask = { + .hdr = { + .src_addr = RTE_BE32(0xffffffff), + .dst_addr = RTE_BE32(0xffffffff), + .type_of_service = 0xff, + .next_proto_id = 0xff, + }, + }; + unsigned int size = sizeof(struct ibv_flow_spec_ipv4_ext); + struct ibv_flow_spec_ipv4_ext ipv4 = { + .type = IBV_FLOW_SPEC_IPV4_EXT, + .size = size, + }; + int ret; + + if (flow->layers & MLX5_FLOW_LAYER_OUTER_L3) + return rte_flow_error_set(error, ENOTSUP, + RTE_FLOW_ERROR_TYPE_ITEM, + item, + "multiple L3 layers not supported"); + else if (flow->layers & MLX5_FLOW_LAYER_OUTER_L4) + return rte_flow_error_set(error, ENOTSUP, + RTE_FLOW_ERROR_TYPE_ITEM, + item, + "L3 cannot follow an L4 layer."); + if (!mask) + mask = &rte_flow_item_ipv4_mask; + ret = mlx5_flow_item_acceptable + (item, (const uint8_t *)mask, + (const uint8_t *)&nic_mask, + sizeof(struct rte_flow_item_ipv4), error); + if (ret < 0) + return ret; + flow->layers |= MLX5_FLOW_LAYER_OUTER_L3_IPV4; + if (size > flow_size) + return size; + if (spec) { + ipv4.val = (struct ibv_flow_ipv4_ext_filter){ + .src_ip = spec->hdr.src_addr, + .dst_ip = spec->hdr.dst_addr, + .proto = spec->hdr.next_proto_id, + .tos = spec->hdr.type_of_service, + }; + ipv4.mask = (struct ibv_flow_ipv4_ext_filter){ + .src_ip = mask->hdr.src_addr, + .dst_ip = mask->hdr.dst_addr, + .proto = mask->hdr.next_proto_id, + .tos = mask->hdr.type_of_service, + }; + /* Remove unwanted bits from values. */ + ipv4.val.src_ip &= ipv4.mask.src_ip; + ipv4.val.dst_ip &= ipv4.mask.dst_ip; + ipv4.val.proto &= ipv4.mask.proto; + ipv4.val.tos &= ipv4.mask.tos; + } + mlx5_flow_spec_verbs_add(flow, &ipv4, size); + return size; +} + /** * Convert the @p pattern into a Verbs specifications after ensuring the NIC * will understand and process it correctly. @@ -551,6 +638,9 @@ mlx5_flow_items(const struct rte_flow_item pattern[], case RTE_FLOW_ITEM_TYPE_VLAN: ret = mlx5_flow_item_vlan(pattern, flow, remain, error); break; + case RTE_FLOW_ITEM_TYPE_IPV4: + ret = mlx5_flow_item_ipv4(pattern, flow, remain, error); + break; default: return rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, -- 2.20.1