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net/mlx5: add flow TCP item

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Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
Acked-by: Yongseok Koh <yskoh@mellanox.com>
This commit is contained in:
Nelio Laranjeiro 2018-07-12 11:30:57 +02:00 committed by Shahaf Shuler
parent 535f686e54
commit 89464c8e89
1 changed files with 79 additions and 0 deletions
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79
drivers/net/mlx5/mlx5_flow.c
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@ -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,