[v4,08/21] net/mlx5: add flow IPv4 item
diff mbox series

Message ID f4696c1d00488c814533922b82c6b4a7ed2a919f.1531387413.git.nelio.laranjeiro@6wind.com
State Accepted, archived
Delegated to: Shahaf Shuler
Headers show
Series
  • net/mlx5: flow rework
Related show

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation fail apply issues

Commit Message

Nélio Laranjeiro July 12, 2018, 9:30 a.m. UTC
Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
Acked-by: Yongseok Koh <yskoh@mellanox.com>
---
 drivers/net/mlx5/mlx5_flow.c | 90 ++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

Patch
diff mbox series

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 659979283..c05b8498d 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,