Provide flow rules capability to match on IPv4 IHL field.
Minimal HCA firmware version requiredto offload IPv4 IHL is
xx_30_2000.
Signed-off-by: Gregory Etelson <getel...@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viachesl...@nvidia.com>
---
doc/guides/nics/mlx5.rst | 1 +
doc/guides/rel_notes/release_21_08.rst | 3 +++
drivers/net/mlx5/mlx5_flow_dv.c | 31 +++++++++++++++++++-------
3 files changed, 27 insertions(+), 8 deletions(-)
diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index eb44a070b1..3cdf0de4e7 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -110,6 +110,7 @@ Features
- Flow integrity offload API.
- Connection tracking.
- Sub-Function representors.
+- IPv4 IHL offload.
Limitations
-----------
diff --git a/doc/guides/rel_notes/release_21_08.rst
b/doc/guides/rel_notes/release_21_08.rst
index a6ecfdf3ce..9fd3b2c214 100644
--- a/doc/guides/rel_notes/release_21_08.rst
+++ b/doc/guides/rel_notes/release_21_08.rst
@@ -55,6 +55,9 @@ New Features
Also, make sure to start the actual text at the margin.
=======================================================
+* **Updated Mellanox MLX5 PMD.**
+
+ * Added IPv4 IHL offload support.
Removed Items
-------------
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index a04a3c2bb8..a84fb60d10 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -2451,19 +2451,19 @@ flow_dv_validate_item_gtp_psc(const struct
rte_flow_item *item,
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
static int
-flow_dv_validate_item_ipv4(const struct rte_flow_item *item,
- uint64_t item_flags,
- uint64_t last_item,
- uint16_t ether_type,
- struct rte_flow_error *error)
+flow_dv_validate_item_ipv4(struct rte_eth_dev *dev,
+ const struct rte_flow_item *item,
+ uint64_t item_flags, uint64_t last_item,
+ uint16_t ether_type, struct rte_flow_error *error)
{
int ret;
+ struct mlx5_priv *priv = dev->data->dev_private;
const struct rte_flow_item_ipv4 *spec = item->spec;
const struct rte_flow_item_ipv4 *last = item->last;
const struct rte_flow_item_ipv4 *mask = item->mask;
rte_be16_t fragment_offset_spec = 0;
rte_be16_t fragment_offset_last = 0;
- const struct rte_flow_item_ipv4 nic_ipv4_mask = {
+ struct rte_flow_item_ipv4 nic_ipv4_mask = {
.hdr = {
.src_addr = RTE_BE32(0xffffffff),
.dst_addr = RTE_BE32(0xffffffff),
@@ -2474,6 +2474,17 @@ flow_dv_validate_item_ipv4(const struct rte_flow_item
*item,
},
};
+ if (mask && (mask->hdr.version_ihl & RTE_IPV4_HDR_IHL_MASK)) {
+ int tunnel = !!(item_flags & MLX5_FLOW_LAYER_TUNNEL);
+ bool ihl_cap = !tunnel ? priv->config.hca_attr.outer_ipv4_ihl :
+ priv->config.hca_attr.inner_ipv4_ihl;
+ if (!ihl_cap)
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM,
+ item,
+ "IPV4 ihl offload not
supported");
+ nic_ipv4_mask.hdr.version_ihl = mask->hdr.version_ihl;
+ }
ret = mlx5_flow_validate_item_ipv4(item, item_flags, last_item,
ether_type, &nic_ipv4_mask,
MLX5_ITEM_RANGE_ACCEPTED, error);
@@ -6771,7 +6782,7 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct
rte_flow_attr *attr,
case RTE_FLOW_ITEM_TYPE_IPV4:
mlx5_flow_tunnel_ip_check(items, next_protocol,
&item_flags, &tunnel);
- ret = flow_dv_validate_item_ipv4(items, item_flags,
+ ret = flow_dv_validate_item_ipv4(dev, items, item_flags,
last_item, ether_type,
error);
if (ret < 0)
@@ -8154,7 +8165,7 @@ flow_dv_translate_item_ipv4(void *matcher, void *key,
void *headers_v;
char *l24_m;
char *l24_v;
- uint8_t tos;
+ uint8_t tos, ihl_m, ihl_v;
if (inner) {
headers_m = MLX5_ADDR_OF(fte_match_param, matcher,
@@ -8183,6 +8194,10 @@ flow_dv_translate_item_ipv4(void *matcher, void *key,
*(uint32_t *)l24_m = ipv4_m->hdr.src_addr;
*(uint32_t *)l24_v = ipv4_m->hdr.src_addr & ipv4_v->hdr.src_addr;
tos = ipv4_m->hdr.type_of_service & ipv4_v->hdr.type_of_service;
+ ihl_m = ipv4_m->hdr.version_ihl & RTE_IPV4_HDR_IHL_MASK;
+ ihl_v = ipv4_v->hdr.version_ihl & RTE_IPV4_HDR_IHL_MASK;
+ MLX5_SET(fte_match_set_lyr_2_4, headers_m, ipv4_ihl, ihl_m);
+ MLX5_SET(fte_match_set_lyr_2_4, headers_v, ipv4_ihl, ihl_m & ihl_v);
MLX5_SET(fte_match_set_lyr_2_4, headers_m, ip_ecn,
ipv4_m->hdr.type_of_service);
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_ecn, tos);
--
2.31.1
