Add support of new rte_flow item and action - TAG and SET_TAG. TAG is
a transient value which can be kept during flow matching.
This is supported through device metadata register reg_c[]. Although
there are 8 registers are available on the current mlx5 device,
some of them can be reserved for firmware or kernel purposes.
The availability should be queried by iterative trial-and-error
mlx5_flow_discover_mreg_c() routine.
Signed-off-by: Yongseok Koh <ys...@mellanox.com>
Signed-off-by: Viacheslav Ovsiienko <viachesl...@mellanox.com>
Acked-by: Matan Azrad <ma...@mellanox.com>
---
drivers/net/mlx5/mlx5_flow_dv.c | 232 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 228 insertions(+), 4 deletions(-)
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 80280ab..fec2efe 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -872,10 +872,12 @@ struct field_modify_info modify_tcp[] = {
return rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ACTION, NULL,
"too many items to modify");
+ assert(conf->id != REG_NONE);
+ assert(conf->id < RTE_DIM(reg_to_field));
actions[i].action_type = MLX5_MODIFICATION_TYPE_SET;
actions[i].field = reg_to_field[conf->id];
actions[i].data0 = rte_cpu_to_be_32(actions[i].data0);
- actions[i].data1 = conf->data;
+ actions[i].data1 = rte_cpu_to_be_32(conf->data);
++i;
resource->actions_num = i;
if (!resource->actions_num)
@@ -886,6 +888,52 @@ struct field_modify_info modify_tcp[] = {
}
/**
+ * Convert SET_TAG action to DV specification.
+ *
+ * @param[in] dev
+ * Pointer to the rte_eth_dev structure.
+ * @param[in,out] resource
+ * Pointer to the modify-header resource.
+ * @param[in] conf
+ * Pointer to action specification.
+ * @param[out] error
+ * Pointer to the error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+flow_dv_convert_action_set_tag
+ (struct rte_eth_dev *dev,
+ struct mlx5_flow_dv_modify_hdr_resource *resource,
+ const struct rte_flow_action_set_tag *conf,
+ struct rte_flow_error *error)
+{
+ rte_be32_t data = rte_cpu_to_be_32(conf->data);
+ rte_be32_t mask = rte_cpu_to_be_32(conf->mask);
+ struct rte_flow_item item = {
+ .spec = &data,
+ .mask = &mask,
+ };
+ struct field_modify_info reg_c_x[] = {
+ [1] = {0, 0, 0},
+ };
+ enum mlx5_modification_field reg_type;
+ int ret;
+
+ ret = mlx5_flow_get_reg_id(dev, MLX5_APP_TAG, conf->index, error);
+ if (ret < 0)
+ return ret;
+ assert(ret != REG_NONE);
+ assert((unsigned int)ret < RTE_DIM(reg_to_field));
+ reg_type = reg_to_field[ret];
+ assert(reg_type > 0);
+ reg_c_x[0] = (struct field_modify_info){4, 0, reg_type};
+ return flow_dv_convert_modify_action(&item, reg_c_x, NULL, resource,
+ MLX5_MODIFICATION_TYPE_SET, error);
+}
+
+/**
* Convert internal COPY_REG action to DV specification.
*
* @param[in] dev
@@ -1016,6 +1064,65 @@ struct field_modify_info modify_tcp[] = {
}
/**
+ * Validate TAG item.
+ *
+ * @param[in] dev
+ * Pointer to the rte_eth_dev structure.
+ * @param[in] item
+ * Item specification.
+ * @param[in] attr
+ * Attributes of flow that includes this item.
+ * @param[out] error
+ * Pointer to error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+flow_dv_validate_item_tag(struct rte_eth_dev *dev,
+ const struct rte_flow_item *item,
+ const struct rte_flow_attr *attr __rte_unused,
+ struct rte_flow_error *error)
+{
+ const struct rte_flow_item_tag *spec = item->spec;
+ const struct rte_flow_item_tag *mask = item->mask;
+ const struct rte_flow_item_tag nic_mask = {
+ .data = RTE_BE32(UINT32_MAX),
+ .index = 0xff,
+ };
+ int ret;
+
+ if (!mlx5_flow_ext_mreg_supported(dev))
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM, item,
+ "extensive metadata register"
+ " isn't supported");
+ if (!spec)
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ITEM_SPEC,
+ item->spec,
+ "data cannot be empty");
+ if (!mask)
+ mask = &rte_flow_item_tag_mask;
+ ret = mlx5_flow_item_acceptable(item, (const uint8_t *)mask,
+ (const uint8_t *)&nic_mask,
+ sizeof(struct rte_flow_item_tag),
+ error);
+ if (ret < 0)
+ return ret;
+ if (mask->index != 0xff)
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ITEM_SPEC, NULL,
+ "partial mask for tag index"
+ " is not supported");
+ ret = mlx5_flow_get_reg_id(dev, MLX5_APP_TAG, spec->index, error);
+ if (ret < 0)
+ return ret;
+ assert(ret != REG_NONE);
+ return 0;
+}
+
+/**
* Validate vport item.
*
* @param[in] dev
@@ -1376,6 +1483,62 @@ struct field_modify_info modify_tcp[] = {
}
/**
+ * Validate SET_TAG action.
+ *
+ * @param[in] dev
+ * Pointer to the rte_eth_dev structure.
+ * @param[in] action
+ * Pointer to the encap action.
+ * @param[in] action_flags
+ * Holds the actions detected until now.
+ * @param[in] attr
+ * Pointer to flow attributes
+ * @param[out] error
+ * Pointer to error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+flow_dv_validate_action_set_tag(struct rte_eth_dev *dev,
+ const struct rte_flow_action *action,
+ uint64_t action_flags,
+ const struct rte_flow_attr *attr,
+ struct rte_flow_error *error)
+{
+ const struct rte_flow_action_set_tag *conf;
+ const uint64_t terminal_action_flags =
+ MLX5_FLOW_ACTION_DROP | MLX5_FLOW_ACTION_QUEUE |
+ MLX5_FLOW_ACTION_RSS;
+ int ret;
+
+ if (!mlx5_flow_ext_mreg_supported(dev))
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ACTION, action,
+ "extensive metadata register"
+ " isn't supported");
+ if (!(action->conf))
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION, action,
+ "configuration cannot be null");
+ conf = (const struct rte_flow_action_set_tag *)action->conf;
+ if (!conf->mask)
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION, action,
+ "zero mask doesn't have any effect");
+ ret = mlx5_flow_get_reg_id(dev, MLX5_APP_TAG, conf->index, error);
+ if (ret < 0)
+ return ret;
+ if (!attr->transfer && attr->ingress &&
+ (action_flags & terminal_action_flags))
+ return rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ACTION, action,
+ "set_tag has no effect"
+ " with terminal actions");
+ return 0;
+}
+
+/**
* Validate count action.
*
* @param[in] dev
@@ -3765,6 +3928,13 @@ struct field_modify_info modify_tcp[] = {
return ret;
last_item = MLX5_FLOW_LAYER_ICMP6;
break;
+ case RTE_FLOW_ITEM_TYPE_TAG:
+ ret = flow_dv_validate_item_tag(dev, items,
+ attr, error);
+ if (ret < 0)
+ return ret;
+ last_item = MLX5_FLOW_ITEM_TAG;
+ break;
case MLX5_RTE_FLOW_ITEM_TYPE_TAG:
case MLX5_RTE_FLOW_ITEM_TYPE_TX_QUEUE:
break;
@@ -3812,6 +3982,17 @@ struct field_modify_info modify_tcp[] = {
action_flags |= MLX5_FLOW_ACTION_MARK;
++actions_n;
break;
+ case RTE_FLOW_ACTION_TYPE_SET_TAG:
+ ret = flow_dv_validate_action_set_tag(dev, actions,
+ action_flags,
+ attr, error);
+ if (ret < 0)
+ return ret;
+ /* Count all modify-header actions as one action. */
+ if (!(action_flags & MLX5_FLOW_MODIFY_HDR_ACTIONS))
+ ++actions_n;
+ action_flags |= MLX5_FLOW_ACTION_SET_TAG;
+ break;
case RTE_FLOW_ACTION_TYPE_DROP:
ret = mlx5_flow_validate_action_drop(action_flags,
attr, error);
@@ -5099,8 +5280,38 @@ struct field_modify_info modify_tcp[] = {
{
const struct mlx5_rte_flow_item_tag *tag_v = item->spec;
const struct mlx5_rte_flow_item_tag *tag_m = item->mask;
- enum modify_reg reg = tag_v->id;
+ assert(tag_v);
+ flow_dv_match_meta_reg(matcher, key, tag_v->id, tag_v->data,
+ tag_m ? tag_m->data : UINT32_MAX);
+}
+
+/**
+ * Add TAG item to matcher
+ *
+ * @param[in] dev
+ * The devich to configure through.
+ * @param[in, out] matcher
+ * Flow matcher.
+ * @param[in, out] key
+ * Flow matcher value.
+ * @param[in] item
+ * Flow pattern to translate.
+ */
+static void
+flow_dv_translate_item_tag(struct rte_eth_dev *dev,
+ void *matcher, void *key,
+ const struct rte_flow_item *item)
+{
+ const struct rte_flow_item_tag *tag_v = item->spec;
+ const struct rte_flow_item_tag *tag_m = item->mask;
+ enum modify_reg reg;
+
+ assert(tag_v);
+ tag_m = tag_m ? tag_m : &rte_flow_item_tag_mask;
+ /* Get the metadata register index for the tag. */
+ reg = mlx5_flow_get_reg_id(dev, MLX5_APP_TAG, tag_v->index, NULL);
+ assert(reg > 0);
flow_dv_match_meta_reg(matcher, key, reg, tag_v->data, tag_m->data);
}
@@ -5775,6 +5986,14 @@ struct field_modify_info modify_tcp[] = {
dev_flow->dv.tag_resource->action;
action_flags |= MLX5_FLOW_ACTION_MARK;
break;
+ case RTE_FLOW_ACTION_TYPE_SET_TAG:
+ if (flow_dv_convert_action_set_tag
+ (dev, &mhdr_res,
+ (const struct rte_flow_action_set_tag *)
+ actions->conf, error))
+ return -rte_errno;
+ action_flags |= MLX5_FLOW_ACTION_SET_TAG;
+ break;
case RTE_FLOW_ACTION_TYPE_DROP:
action_flags |= MLX5_FLOW_ACTION_DROP;
break;
@@ -6055,7 +6274,7 @@ struct field_modify_info modify_tcp[] = {
break;
case RTE_FLOW_ACTION_TYPE_END:
actions_end = true;
- if (action_flags & MLX5_FLOW_MODIFY_HDR_ACTIONS) {
+ if (mhdr_res.actions_num) {
/* create modify action if needed. */
if (flow_dv_modify_hdr_resource_register
(dev, &mhdr_res, dev_flow, error))
@@ -6067,7 +6286,7 @@ struct field_modify_info modify_tcp[] = {
default:
break;
}
- if ((action_flags & MLX5_FLOW_MODIFY_HDR_ACTIONS) &&
+ if (mhdr_res.actions_num &&
modify_action_position == UINT32_MAX)
modify_action_position = actions_n++;
}
@@ -6230,6 +6449,11 @@ struct field_modify_info modify_tcp[] = {
items, tunnel);
last_item = MLX5_FLOW_LAYER_ICMP6;
break;
+ case RTE_FLOW_ITEM_TYPE_TAG:
+ flow_dv_translate_item_tag(dev, match_mask,
+ match_value, items);
+ last_item = MLX5_FLOW_ITEM_TAG;
+ break;
case MLX5_RTE_FLOW_ITEM_TYPE_TAG:
flow_dv_translate_mlx5_item_tag(match_mask,
match_value, items);
--
1.8.3.1
