From 89464c8e89b12bbc1838d9cee60a9be8c03ab592 Mon Sep 17 00:00:00 2001 From: Nelio Laranjeiro Date: Thu, 12 Jul 2018 11:30:57 +0200 Subject: [PATCH] net/mlx5: add flow TCP item Signed-off-by: Nelio Laranjeiro Acked-by: Yongseok Koh --- drivers/net/mlx5/mlx5_flow.c | 79 ++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c index 0096ed8a2f..f646eee01f 100644 --- a/drivers/net/mlx5/mlx5_flow.c +++ b/drivers/net/mlx5/mlx5_flow.c @@ -53,6 +53,7 @@ extern const struct eth_dev_ops mlx5_dev_ops_isolate; #define MLX5_FLOW_FATE_QUEUE (1u << 1) /* possible L3 layers protocols filtering. */ +#define MLX5_IP_PROTOCOL_TCP 6 #define MLX5_IP_PROTOCOL_UDP 17 /** Handles information leading to a drop fate. */ @@ -787,6 +788,81 @@ mlx5_flow_item_udp(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_tcp(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_tcp *spec = item->spec; + const struct rte_flow_item_tcp *mask = item->mask; + unsigned int size = sizeof(struct ibv_flow_spec_tcp_udp); + struct ibv_flow_spec_tcp_udp tcp = { + .type = IBV_FLOW_SPEC_TCP, + .size = size, + }; + int ret; + + if (flow->l3_protocol_en && flow->l3_protocol != MLX5_IP_PROTOCOL_TCP) + return rte_flow_error_set(error, ENOTSUP, + RTE_FLOW_ERROR_TYPE_ITEM, + item, + "protocol filtering not compatible" + " with TCP layer"); + if (!(flow->layers & MLX5_FLOW_LAYER_OUTER_L3)) + return rte_flow_error_set(error, ENOTSUP, + RTE_FLOW_ERROR_TYPE_ITEM, + item, + "L3 is mandatory to filter on L4"); + if (flow->layers & MLX5_FLOW_LAYER_OUTER_L4) + return rte_flow_error_set(error, ENOTSUP, + RTE_FLOW_ERROR_TYPE_ITEM, + item, + "L4 layer is already present"); + if (!mask) + mask = &rte_flow_item_tcp_mask; + ret = mlx5_flow_item_acceptable + (item, (const uint8_t *)mask, + (const uint8_t *)&rte_flow_item_tcp_mask, + sizeof(struct rte_flow_item_tcp), error); + if (ret < 0) + return ret; + flow->layers |= MLX5_FLOW_LAYER_OUTER_L4_TCP; + if (size > flow_size) + return size; + if (spec) { + tcp.val.dst_port = spec->hdr.dst_port; + tcp.val.src_port = spec->hdr.src_port; + tcp.mask.dst_port = mask->hdr.dst_port; + tcp.mask.src_port = mask->hdr.src_port; + /* Remove unwanted bits from values. */ + tcp.val.src_port &= tcp.mask.src_port; + tcp.val.dst_port &= tcp.mask.dst_port; + } + mlx5_flow_spec_verbs_add(flow, &tcp, size); + return size; +} + /** * Convert the @p pattern into a Verbs specifications after ensuring the NIC * will understand and process it correctly. @@ -841,6 +917,9 @@ mlx5_flow_items(const struct rte_flow_item pattern[], case RTE_FLOW_ITEM_TYPE_UDP: ret = mlx5_flow_item_udp(pattern, flow, remain, error); break; + case RTE_FLOW_ITEM_TYPE_TCP: + ret = mlx5_flow_item_tcp(pattern, flow, remain, error); + break; default: return rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,