@@ -56,6 +56,7 @@ Usage doc = Y
[rte_flow items]
aggr_affinity = Y
+compare = Y
conntrack = Y
ecpri = Y
esp = Y
@@ -780,6 +780,13 @@ Limitations
The flow engine of a process cannot move from active to standby mode
if preceding active application rules are still present and vice versa.
+- Match with compare result item (``RTE_FLOW_ITEM_TYPE_COMPARE``):
+
+ - Only supported in HW steering(``dv_flow_en`` = 2) mode.
+ - Only single flow is supported to the flow table.
+ - Only 32-bit comparison is supported.
+ - Only match with compare result between packet fields is supported.
+
Statistics
----------
@@ -63,7 +63,7 @@ New Features
* **Updated NVIDIA mlx5 driver.**
* Added support for accumulating from src field to dst field.
-
+ * Added support for comparing result between packet fields or value.
Removed Items
-------------
@@ -277,6 +277,9 @@ enum mlx5_feature_name {
/* NSH ITEM */
#define MLX5_FLOW_ITEM_NSH (1ull << 53)
+/* COMPARE ITEM */
+#define MLX5_FLOW_ITEM_COMPARE (1ull << 54)
+
/* Outer Masks. */
#define MLX5_FLOW_LAYER_OUTER_L3 \
(MLX5_FLOW_LAYER_OUTER_L3_IPV4 | MLX5_FLOW_LAYER_OUTER_L3_IPV6)
@@ -426,6 +426,9 @@ flow_hw_matching_item_flags_get(const struct rte_flow_item items[])
case RTE_FLOW_ITEM_TYPE_GTP:
last_item = MLX5_FLOW_LAYER_GTP;
break;
+ case RTE_FLOW_ITEM_TYPE_COMPARE:
+ last_item = MLX5_FLOW_ITEM_COMPARE;
+ break;
default:
break;
}
@@ -4390,6 +4393,8 @@ flow_hw_table_create(struct rte_eth_dev *dev,
rte_errno = EINVAL;
goto it_error;
}
+ if (item_templates[i]->item_flags & MLX5_FLOW_ITEM_COMPARE)
+ matcher_attr.mode = MLX5DR_MATCHER_RESOURCE_MODE_HTABLE;
ret = __atomic_fetch_add(&item_templates[i]->refcnt, 1,
__ATOMIC_RELAXED) + 1;
if (ret <= 1) {
@@ -6670,6 +6675,66 @@ flow_hw_prepend_item(const struct rte_flow_item *items,
return copied_items;
}
+static inline bool
+flow_hw_item_compare_field_supported(enum rte_flow_field_id field)
+{
+ switch (field) {
+ case RTE_FLOW_FIELD_TAG:
+ case RTE_FLOW_FIELD_META:
+ case RTE_FLOW_FIELD_VALUE:
+ return true;
+ default:
+ break;
+ }
+ return false;
+}
+
+static int
+flow_hw_validate_item_compare(const struct rte_flow_item *item,
+ struct rte_flow_error *error)
+{
+ const struct rte_flow_item_compare *comp_m = item->mask;
+ const struct rte_flow_item_compare *comp_v = item->spec;
+
+ if (unlikely(!comp_m))
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+ NULL,
+ "compare item mask is missing");
+ if (comp_m->width != UINT32_MAX)
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+ NULL,
+ "compare item only support full mask");
+ if (!flow_hw_item_compare_field_supported(comp_m->a.field) ||
+ !flow_hw_item_compare_field_supported(comp_m->b.field))
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+ NULL,
+ "compare item field not support");
+ if (comp_m->a.field == RTE_FLOW_FIELD_VALUE &&
+ comp_m->b.field == RTE_FLOW_FIELD_VALUE)
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+ NULL,
+ "compare between value is not valid");
+ if (comp_v) {
+ if (comp_v->operation != comp_m->operation ||
+ comp_v->a.field != comp_m->a.field ||
+ comp_v->b.field != comp_m->b.field)
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+ NULL,
+ "compare item spec/mask not matching");
+ if ((comp_v->width & comp_m->width) != 32)
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+ NULL,
+ "compare item only support full mask");
+ }
+ return 0;
+}
+
static int
flow_hw_pattern_validate(struct rte_eth_dev *dev,
const struct rte_flow_pattern_template_attr *attr,
@@ -6680,6 +6745,7 @@ flow_hw_pattern_validate(struct rte_eth_dev *dev,
int i, tag_idx;
bool items_end = false;
uint32_t tag_bitmap = 0;
+ int ret;
if (!attr->ingress && !attr->egress && !attr->transfer)
return rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_ATTR, NULL,
@@ -6817,6 +6883,13 @@ flow_hw_pattern_validate(struct rte_eth_dev *dev,
" attribute");
break;
}
+ case RTE_FLOW_ITEM_TYPE_COMPARE:
+ {
+ ret = flow_hw_validate_item_compare(&items[i], error);
+ if (ret)
+ return ret;
+ break;
+ }
case RTE_FLOW_ITEM_TYPE_VOID:
case RTE_FLOW_ITEM_TYPE_ETH:
case RTE_FLOW_ITEM_TYPE_VLAN: