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From: Gregory Etelson <getelson@nvidia.com>
To: <dev@dpdk.org>
Cc: <getelson@nvidia.com>, <matan@nvidia.com>, <orika@nvidia.com>,
	<rasland@nvidia.com>, <ferruh.yigit@intel.com>, <stable@dpdk.org>,
	"Viacheslav Ovsiienko" <viacheslavo@nvidia.com>,
	Shahaf Shuler <shahafs@nvidia.com>
Subject: [dpdk-dev] [PATCH v4] net/mlx5: fix tunnel offload private items location
Date: Thu, 6 May 2021 12:57:51 +0300	[thread overview]
Message-ID: <20210506095751.5689-1-getelson@nvidia.com> (raw)
In-Reply-To: <20210419130204.24348-1-getelson@nvidia.com>

Tunnel offload API requires application to query PMD for specific flow
items and actions. Application uses these PMD specific elements to
build flow rules according to the tunnel offload model.
The model does not restrict private elements location in a flow rule,
but the current MLX5 PMD implementation expects that tunnel offload
rule will begin with PMD specific elements.
The patch removes that placement limitation.

Cc: stable@dpdk.org

Fixes: 4ec6360de37d ("net/mlx5: implement tunnel offload")

Signed-off-by: Gregory Etelson <getelson@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
v2: Update the patch comment.
v3: Remove testpmd patch from the series.
v4: Remove redundant verifications in flow_dv_validate.
---
 drivers/net/mlx5/mlx5_flow.c    | 48 ++++++++++++------
 drivers/net/mlx5/mlx5_flow.h    | 46 ++++++++++-------
 drivers/net/mlx5/mlx5_flow_dv.c | 88 ++++++++++++++++-----------------
 3 files changed, 102 insertions(+), 80 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 3194cd5633..f464271d42 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -50,6 +50,7 @@ flow_tunnel_add_default_miss(struct rte_eth_dev *dev,
 			     const struct rte_flow_attr *attr,
 			     const struct rte_flow_action *app_actions,
 			     uint32_t flow_idx,
+			     const struct mlx5_flow_tunnel *tunnel,
 			     struct tunnel_default_miss_ctx *ctx,
 			     struct rte_flow_error *error);
 static struct mlx5_flow_tunnel *
@@ -5958,22 +5959,14 @@ flow_create_split_outer(struct rte_eth_dev *dev,
 	return ret;
 }
 
-static struct mlx5_flow_tunnel *
-flow_tunnel_from_rule(struct rte_eth_dev *dev,
-		      const struct rte_flow_attr *attr,
-		      const struct rte_flow_item items[],
-		      const struct rte_flow_action actions[])
+static inline struct mlx5_flow_tunnel *
+flow_tunnel_from_rule(const struct mlx5_flow *flow)
 {
 	struct mlx5_flow_tunnel *tunnel;
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wcast-qual"
-	if (is_flow_tunnel_match_rule(dev, attr, items, actions))
-		tunnel = (struct mlx5_flow_tunnel *)items[0].spec;
-	else if (is_flow_tunnel_steer_rule(dev, attr, items, actions))
-		tunnel = (struct mlx5_flow_tunnel *)actions[0].conf;
-	else
-		tunnel = NULL;
+	tunnel = (typeof(tunnel))flow->tunnel;
 #pragma GCC diagnostic pop
 
 	return tunnel;
@@ -6168,12 +6161,11 @@ flow_list_create(struct rte_eth_dev *dev, uint32_t *list,
 					      error);
 		if (ret < 0)
 			goto error;
-		if (is_flow_tunnel_steer_rule(dev, attr,
-					      buf->entry[i].pattern,
-					      p_actions_rx)) {
+		if (is_flow_tunnel_steer_rule(wks->flows[0].tof_type)) {
 			ret = flow_tunnel_add_default_miss(dev, flow, attr,
 							   p_actions_rx,
 							   idx,
+							   wks->flows[0].tunnel,
 							   &default_miss_ctx,
 							   error);
 			if (ret < 0) {
@@ -6237,7 +6229,7 @@ flow_list_create(struct rte_eth_dev *dev, uint32_t *list,
 	}
 	flow_rxq_flags_set(dev, flow);
 	rte_free(translated_actions);
-	tunnel = flow_tunnel_from_rule(dev, attr, items, actions);
+	tunnel = flow_tunnel_from_rule(wks->flows);
 	if (tunnel) {
 		flow->tunnel = 1;
 		flow->tunnel_id = tunnel->tunnel_id;
@@ -8152,6 +8144,28 @@ int rte_pmd_mlx5_sync_flow(uint16_t port_id, uint32_t domains)
 	return ret;
 }
 
+const struct mlx5_flow_tunnel *
+mlx5_get_tof(const struct rte_flow_item *item,
+	     const struct rte_flow_action *action,
+	     enum mlx5_tof_rule_type *rule_type)
+{
+	for (; item->type != RTE_FLOW_ITEM_TYPE_END; item++) {
+		if (item->type == (typeof(item->type))
+				  MLX5_RTE_FLOW_ITEM_TYPE_TUNNEL) {
+			*rule_type = MLX5_TUNNEL_OFFLOAD_MATCH_RULE;
+			return flow_items_to_tunnel(item);
+		}
+	}
+	for (; action->conf != RTE_FLOW_ACTION_TYPE_END; action++) {
+		if (action->type == (typeof(action->type))
+				    MLX5_RTE_FLOW_ACTION_TYPE_TUNNEL_SET) {
+			*rule_type = MLX5_TUNNEL_OFFLOAD_SET_RULE;
+			return flow_actions_to_tunnel(action);
+		}
+	}
+	return NULL;
+}
+
 /**
  * tunnel offload functionalilty is defined for DV environment only
  */
@@ -8182,13 +8196,13 @@ flow_tunnel_add_default_miss(struct rte_eth_dev *dev,
 			     const struct rte_flow_attr *attr,
 			     const struct rte_flow_action *app_actions,
 			     uint32_t flow_idx,
+			     const struct mlx5_flow_tunnel *tunnel,
 			     struct tunnel_default_miss_ctx *ctx,
 			     struct rte_flow_error *error)
 {
 	struct mlx5_priv *priv = dev->data->dev_private;
 	struct mlx5_flow *dev_flow;
 	struct rte_flow_attr miss_attr = *attr;
-	const struct mlx5_flow_tunnel *tunnel = app_actions[0].conf;
 	const struct rte_flow_item miss_items[2] = {
 		{
 			.type = RTE_FLOW_ITEM_TYPE_ETH,
@@ -8274,6 +8288,7 @@ flow_tunnel_add_default_miss(struct rte_eth_dev *dev,
 	dev_flow->flow = flow;
 	dev_flow->external = true;
 	dev_flow->tunnel = tunnel;
+	dev_flow->tof_type = MLX5_TUNNEL_OFFLOAD_MISS_RULE;
 	/* Subflow object was created, we must include one in the list. */
 	SILIST_INSERT(&flow->dev_handles, dev_flow->handle_idx,
 		      dev_flow->handle, next);
@@ -8887,6 +8902,7 @@ flow_tunnel_add_default_miss(__rte_unused struct rte_eth_dev *dev,
 			     __rte_unused const struct rte_flow_attr *attr,
 			     __rte_unused const struct rte_flow_action *actions,
 			     __rte_unused uint32_t flow_idx,
+			     __rte_unused const struct mlx5_flow_tunnel *tunnel,
 			     __rte_unused struct tunnel_default_miss_ctx *ctx,
 			     __rte_unused struct rte_flow_error *error)
 {
diff --git a/drivers/net/mlx5/mlx5_flow.h b/drivers/net/mlx5/mlx5_flow.h
index 5365699426..04c8806bf6 100644
--- a/drivers/net/mlx5/mlx5_flow.h
+++ b/drivers/net/mlx5/mlx5_flow.h
@@ -819,6 +819,16 @@ struct mlx5_flow_verbs_workspace {
 /** Maximal number of device sub-flows supported. */
 #define MLX5_NUM_MAX_DEV_FLOWS 32
 
+/**
+ * tunnel offload rules type
+ */
+enum mlx5_tof_rule_type {
+	MLX5_TUNNEL_OFFLOAD_NONE = 0,
+	MLX5_TUNNEL_OFFLOAD_SET_RULE,
+	MLX5_TUNNEL_OFFLOAD_MATCH_RULE,
+	MLX5_TUNNEL_OFFLOAD_MISS_RULE,
+};
+
 /** Device flow structure. */
 __extension__
 struct mlx5_flow {
@@ -854,6 +864,7 @@ struct mlx5_flow {
 	struct mlx5_flow_handle *handle;
 	uint32_t handle_idx; /* Index of the mlx5 flow handle memory. */
 	const struct mlx5_flow_tunnel *tunnel;
+	enum mlx5_tof_rule_type tof_type;
 };
 
 /* Flow meter state. */
@@ -949,10 +960,10 @@ mlx5_tunnel_hub(struct rte_eth_dev *dev)
 }
 
 static inline bool
-is_tunnel_offload_active(struct rte_eth_dev *dev)
+is_tunnel_offload_active(const struct rte_eth_dev *dev)
 {
 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
-	struct mlx5_priv *priv = dev->data->dev_private;
+	const struct mlx5_priv *priv = dev->data->dev_private;
 	return !!priv->config.dv_miss_info;
 #else
 	RTE_SET_USED(dev);
@@ -961,23 +972,15 @@ is_tunnel_offload_active(struct rte_eth_dev *dev)
 }
 
 static inline bool
-is_flow_tunnel_match_rule(__rte_unused struct rte_eth_dev *dev,
-			  __rte_unused const struct rte_flow_attr *attr,
-			  __rte_unused const struct rte_flow_item items[],
-			  __rte_unused const struct rte_flow_action actions[])
+is_flow_tunnel_match_rule(enum mlx5_tof_rule_type tof_rule_type)
 {
-	return (items[0].type == (typeof(items[0].type))
-				 MLX5_RTE_FLOW_ITEM_TYPE_TUNNEL);
+	return tof_rule_type == MLX5_TUNNEL_OFFLOAD_MATCH_RULE;
 }
 
 static inline bool
-is_flow_tunnel_steer_rule(__rte_unused struct rte_eth_dev *dev,
-			  __rte_unused const struct rte_flow_attr *attr,
-			  __rte_unused const struct rte_flow_item items[],
-			  __rte_unused const struct rte_flow_action actions[])
+is_flow_tunnel_steer_rule(enum mlx5_tof_rule_type tof_rule_type)
 {
-	return (actions[0].type == (typeof(actions[0].type))
-				   MLX5_RTE_FLOW_ACTION_TYPE_TUNNEL_SET);
+	return tof_rule_type == MLX5_TUNNEL_OFFLOAD_SET_RULE;
 }
 
 static inline const struct mlx5_flow_tunnel *
@@ -1273,11 +1276,10 @@ struct flow_grp_info {
 
 static inline bool
 tunnel_use_standard_attr_group_translate
-		    (struct rte_eth_dev *dev,
-		     const struct mlx5_flow_tunnel *tunnel,
+		    (const struct rte_eth_dev *dev,
 		     const struct rte_flow_attr *attr,
-		     const struct rte_flow_item items[],
-		     const struct rte_flow_action actions[])
+		     const struct mlx5_flow_tunnel *tunnel,
+		     enum mlx5_tof_rule_type tof_rule_type)
 {
 	bool verdict;
 
@@ -1293,7 +1295,7 @@ tunnel_use_standard_attr_group_translate
 		 * method
 		 */
 		verdict = !attr->group &&
-			  is_flow_tunnel_steer_rule(dev, attr, items, actions);
+			  is_flow_tunnel_steer_rule(tof_rule_type);
 	} else {
 		/*
 		 * non-tunnel group translation uses standard method for
@@ -1681,4 +1683,10 @@ int mlx5_flow_create_def_policy(struct rte_eth_dev *dev);
 void mlx5_flow_destroy_def_policy(struct rte_eth_dev *dev);
 void flow_drv_rxq_flags_set(struct rte_eth_dev *dev,
 		       struct mlx5_flow_handle *dev_handle);
+const struct mlx5_flow_tunnel *
+mlx5_get_tof(const struct rte_flow_item *items,
+	     const struct rte_flow_action *actions,
+	     enum mlx5_tof_rule_type *rule_type);
+
+
 #endif /* RTE_PMD_MLX5_FLOW_H_ */
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 70e8d0b113..10ca342edc 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -6627,10 +6627,12 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct rte_flow_attr *attr,
 	uint32_t rw_act_num = 0;
 	uint64_t is_root;
 	const struct mlx5_flow_tunnel *tunnel;
+	enum mlx5_tof_rule_type tof_rule_type;
 	struct flow_grp_info grp_info = {
 		.external = !!external,
 		.transfer = !!attr->transfer,
 		.fdb_def_rule = !!priv->fdb_def_rule,
+		.std_tbl_fix = true,
 	};
 	const struct rte_eth_hairpin_conf *conf;
 	const struct rte_flow_item *rule_items = items;
@@ -6638,23 +6640,22 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct rte_flow_attr *attr,
 
 	if (items == NULL)
 		return -1;
-	if (is_flow_tunnel_match_rule(dev, attr, items, actions)) {
-		tunnel = flow_items_to_tunnel(items);
-		action_flags |= MLX5_FLOW_ACTION_TUNNEL_MATCH |
-				MLX5_FLOW_ACTION_DECAP;
-	} else if (is_flow_tunnel_steer_rule(dev, attr, items, actions)) {
-		tunnel = flow_actions_to_tunnel(actions);
-		action_flags |= MLX5_FLOW_ACTION_TUNNEL_SET;
-	} else {
-		tunnel = NULL;
+	tunnel = is_tunnel_offload_active(dev) ?
+		 mlx5_get_tof(items, actions, &tof_rule_type) : NULL;
+	if (tunnel) {
+		if (priv->representor)
+			return rte_flow_error_set
+				(error, ENOTSUP,
+				 RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				 NULL, "decap not supported for VF representor");
+		if (tof_rule_type == MLX5_TUNNEL_OFFLOAD_SET_RULE)
+			action_flags |= MLX5_FLOW_ACTION_TUNNEL_SET;
+		else if (tof_rule_type == MLX5_TUNNEL_OFFLOAD_MATCH_RULE)
+			action_flags |= MLX5_FLOW_ACTION_TUNNEL_MATCH |
+					MLX5_FLOW_ACTION_DECAP;
+		grp_info.std_tbl_fix = tunnel_use_standard_attr_group_translate
+					(dev, attr, tunnel, tof_rule_type);
 	}
-	if (tunnel && priv->representor)
-		return rte_flow_error_set(error, ENOTSUP,
-					  RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
-					  "decap not supported "
-					  "for VF representor");
-	grp_info.std_tbl_fix = tunnel_use_standard_attr_group_translate
-				(dev, tunnel, attr, items, actions);
 	ret = flow_dv_validate_attributes(dev, tunnel, attr, &grp_info, error);
 	if (ret < 0)
 		return ret;
@@ -6668,15 +6669,6 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct rte_flow_attr *attr,
 						  RTE_FLOW_ERROR_TYPE_ITEM,
 						  NULL, "item not supported");
 		switch (type) {
-		case MLX5_RTE_FLOW_ITEM_TYPE_TUNNEL:
-			if (items[0].type != (typeof(items[0].type))
-						MLX5_RTE_FLOW_ITEM_TYPE_TUNNEL)
-				return rte_flow_error_set
-						(error, EINVAL,
-						RTE_FLOW_ERROR_TYPE_ITEM,
-						NULL, "MLX5 private items "
-						"must be the first");
-			break;
 		case RTE_FLOW_ITEM_TYPE_VOID:
 			break;
 		case RTE_FLOW_ITEM_TYPE_PORT_ID:
@@ -6975,6 +6967,11 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct rte_flow_attr *attr,
 			if (ret < 0)
 				return ret;
 			break;
+		case MLX5_RTE_FLOW_ITEM_TYPE_TUNNEL:
+			/* tunnel offload item was processed before
+			 * list it here as a supported type
+			 */
+			break;
 		default:
 			return rte_flow_error_set(error, ENOTSUP,
 						  RTE_FLOW_ERROR_TYPE_ITEM,
@@ -7516,17 +7513,6 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct rte_flow_attr *attr,
 			action_flags |= MLX5_FLOW_ACTION_SAMPLE;
 			++actions_n;
 			break;
-		case MLX5_RTE_FLOW_ACTION_TYPE_TUNNEL_SET:
-			if (actions[0].type != (typeof(actions[0].type))
-				MLX5_RTE_FLOW_ACTION_TYPE_TUNNEL_SET)
-				return rte_flow_error_set
-						(error, EINVAL,
-						RTE_FLOW_ERROR_TYPE_ACTION,
-						NULL, "MLX5 private action "
-						"must be the first");
-
-			action_flags |= MLX5_FLOW_ACTION_TUNNEL_SET;
-			break;
 		case RTE_FLOW_ACTION_TYPE_MODIFY_FIELD:
 			ret = flow_dv_validate_action_modify_field(dev,
 								   action_flags,
@@ -7551,6 +7537,11 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct rte_flow_attr *attr,
 				return ret;
 			action_flags |= MLX5_FLOW_ACTION_CT;
 			break;
+		case MLX5_RTE_FLOW_ACTION_TYPE_TUNNEL_SET:
+			/* tunnel offload action was processed before
+			 * list it here as a supported type
+			 */
+			break;
 		default:
 			return rte_flow_error_set(error, ENOTSUP,
 						  RTE_FLOW_ERROR_TYPE_ACTION,
@@ -12035,13 +12026,14 @@ flow_dv_translate(struct rte_eth_dev *dev,
 	int tmp_actions_n = 0;
 	uint32_t table;
 	int ret = 0;
-	const struct mlx5_flow_tunnel *tunnel;
+	const struct mlx5_flow_tunnel *tunnel = NULL;
 	struct flow_grp_info grp_info = {
 		.external = !!dev_flow->external,
 		.transfer = !!attr->transfer,
 		.fdb_def_rule = !!priv->fdb_def_rule,
 		.skip_scale = dev_flow->skip_scale &
 			(1 << MLX5_SCALE_FLOW_GROUP_BIT),
+		.std_tbl_fix = true,
 	};
 	const struct rte_flow_item *head_item = items;
 
@@ -12057,15 +12049,21 @@ flow_dv_translate(struct rte_eth_dev *dev,
 					   MLX5DV_FLOW_TABLE_TYPE_NIC_RX;
 	/* update normal path action resource into last index of array */
 	sample_act = &mdest_res.sample_act[MLX5_MAX_DEST_NUM - 1];
-	tunnel = is_flow_tunnel_match_rule(dev, attr, items, actions) ?
-		 flow_items_to_tunnel(items) :
-		 is_flow_tunnel_steer_rule(dev, attr, items, actions) ?
-		 flow_actions_to_tunnel(actions) :
-		 dev_flow->tunnel ? dev_flow->tunnel : NULL;
+	if (is_tunnel_offload_active(dev)) {
+		if (dev_flow->tunnel) {
+			RTE_VERIFY(dev_flow->tof_type ==
+				   MLX5_TUNNEL_OFFLOAD_MISS_RULE);
+			tunnel = dev_flow->tunnel;
+		} else {
+			tunnel = mlx5_get_tof(items, actions,
+					      &dev_flow->tof_type);
+			dev_flow->tunnel = tunnel;
+		}
+		grp_info.std_tbl_fix = tunnel_use_standard_attr_group_translate
+					(dev, attr, tunnel, dev_flow->tof_type);
+	}
 	mhdr_res->ft_type = attr->egress ? MLX5DV_FLOW_TABLE_TYPE_NIC_TX :
 					   MLX5DV_FLOW_TABLE_TYPE_NIC_RX;
-	grp_info.std_tbl_fix = tunnel_use_standard_attr_group_translate
-				(dev, tunnel, attr, items, actions);
 	ret = mlx5_flow_group_to_table(dev, tunnel, attr->group, &table,
 				       &grp_info, error);
 	if (ret)
@@ -12075,7 +12073,7 @@ flow_dv_translate(struct rte_eth_dev *dev,
 		mhdr_res->ft_type = MLX5DV_FLOW_TABLE_TYPE_FDB;
 	/* number of actions must be set to 0 in case of dirty stack. */
 	mhdr_res->actions_num = 0;
-	if (is_flow_tunnel_match_rule(dev, attr, items, actions)) {
+	if (is_flow_tunnel_match_rule(dev_flow->tof_type)) {
 		/*
 		 * do not add decap action if match rule drops packet
 		 * HW rejects rules with decap & drop
-- 
2.31.1


  parent reply	other threads:[~2021-05-06  9:58 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-19 13:02 [dpdk-dev] [PATCH 1/2] " Gregory Etelson
2021-04-19 13:02 ` [dpdk-dev] [PATCH 2/2] app/testpmd: " Gregory Etelson
2021-04-23  8:50   ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
2021-04-25 15:57 ` [dpdk-dev] [PATCH v2 1/2] net/mlx5: " Gregory Etelson
2021-04-25 15:57   ` [dpdk-dev] [PATCH v2 2/2] app/testpmd: " Gregory Etelson
2021-04-30 13:49     ` Ferruh Yigit
2021-04-25 16:28   ` [dpdk-dev] [PATCH v2 1/2] net/mlx5: " Thomas Monjalon
2021-04-25 17:01     ` Gregory Etelson
2021-04-25 17:07       ` Thomas Monjalon
2021-04-26  7:54         ` Ferruh Yigit
2021-04-27  9:27           ` Gregory Etelson
2021-04-29  7:44             ` Gregory Etelson
2021-04-30 13:37               ` Ferruh Yigit
2021-05-04  9:20           ` Gregory Etelson
2021-05-02  8:08 ` [dpdk-dev] [PATCH v3] " Gregory Etelson
2021-05-04  8:10   ` Raslan Darawsheh
2021-05-04  8:20   ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
2021-05-04  9:12     ` Gregory Etelson
2021-05-05 17:45       ` Ferruh Yigit
2021-05-06  6:08         ` Gregory Etelson
2021-05-06  7:40           ` Gregory Etelson
2021-05-06  7:59             ` [dpdk-dev] net/mlx5: mellanox cx5/cx6-dx increment "rx_phy_discard_packets" with DPDK rte_flow actions COUNT & DROP Arthas
2021-05-06 10:55               ` Slava Ovsiienko
2021-05-06  9:57 ` Gregory Etelson [this message]
2021-05-10 12:29   ` [dpdk-dev] [PATCH v4] net/mlx5: fix tunnel offload private items location Gregory Etelson
2021-05-10 16:10     ` Ferruh Yigit
2021-05-11 22:16   ` Ferruh Yigit

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