[dpdk-dev] [PATCH v2 17/25] net/mlx5: remove unused mreg copy code

[Suanming Mou <suanmingm@nvidia.com>]

After non-cache mode feature was implemented, the flows can only be
created when port started. No need to check if the mreg flows are
created in port stopped status, and apply the mreg flows after port
start will also never happen.

This commit removed the relevant not used mreg copy code.

Signed-off-by: Suanming Mou <suanmingm@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
---
 drivers/net/mlx5/mlx5.h      |   2 -
 drivers/net/mlx5/mlx5_flow.c | 185 -------------------------------------------
 drivers/net/mlx5/mlx5_flow.h |   2 -
 3 files changed, 189 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index ae6d37d..0e4917a 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -1050,8 +1050,6 @@ int mlx5_dev_filter_ctrl(struct rte_eth_dev *dev,
 			 enum rte_filter_type filter_type,
 			 enum rte_filter_op filter_op,
 			 void *arg);
-int mlx5_flow_start(struct rte_eth_dev *dev, uint32_t *list);
-void mlx5_flow_stop(struct rte_eth_dev *dev, uint32_t *list);
 int mlx5_flow_start_default(struct rte_eth_dev *dev);
 void mlx5_flow_stop_default(struct rte_eth_dev *dev);
 int mlx5_flow_verify(struct rte_eth_dev *dev);
diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 80b4980..b2e694d 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -3002,28 +3002,6 @@ struct mlx5_flow_tunnel_info {
 }
 
 /**
- * Flow driver remove API. This abstracts calling driver specific functions.
- * Parent flow (rte_flow) should have driver type (drv_type). It removes a flow
- * on device. All the resources of the flow should be freed by calling
- * flow_drv_destroy().
- *
- * @param[in] dev
- *   Pointer to Ethernet device.
- * @param[in, out] flow
- *   Pointer to flow structure.
- */
-static inline void
-flow_drv_remove(struct rte_eth_dev *dev, struct rte_flow *flow)
-{
-	const struct mlx5_flow_driver_ops *fops;
-	enum mlx5_flow_drv_type type = flow->drv_type;
-
-	MLX5_ASSERT(type > MLX5_FLOW_TYPE_MIN && type < MLX5_FLOW_TYPE_MAX);
-	fops = flow_get_drv_ops(type);
-	fops->remove(dev, flow);
-}
-
-/**
  * Flow driver destroy API. This abstracts calling driver specific functions.
  * Parent flow (rte_flow) should have driver type (drv_type). It removes a flow
  * on device and releases resources of the flow.
@@ -3487,19 +3465,6 @@ struct mlx5_flow_tunnel_info {
 				 flow->rix_mreg_copy);
 	if (!mcp_res || !priv->mreg_cp_tbl)
 		return;
-	if (flow->copy_applied) {
-		MLX5_ASSERT(mcp_res->appcnt);
-		flow->copy_applied = 0;
-		--mcp_res->appcnt;
-		if (!mcp_res->appcnt) {
-			struct rte_flow *mcp_flow = mlx5_ipool_get
-					(priv->sh->ipool[MLX5_IPOOL_RTE_FLOW],
-					mcp_res->rix_flow);
-
-			if (mcp_flow)
-				flow_drv_remove(dev, mcp_flow);
-		}
-	}
 	/*
 	 * We do not check availability of metadata registers here,
 	 * because copy resources are not allocated in this case.
@@ -3514,81 +3479,6 @@ struct mlx5_flow_tunnel_info {
 }
 
 /**
- * Start flow in RX_CP_TBL.
- *
- * @param dev
- *   Pointer to Ethernet device.
- * @flow
- *   Parent flow for wich copying is provided.
- *
- * @return
- *   0 on success, a negative errno value otherwise and rte_errno is set.
- */
-static int
-flow_mreg_start_copy_action(struct rte_eth_dev *dev,
-			    struct rte_flow *flow)
-{
-	struct mlx5_flow_mreg_copy_resource *mcp_res;
-	struct mlx5_priv *priv = dev->data->dev_private;
-	int ret;
-
-	if (!flow->rix_mreg_copy || flow->copy_applied)
-		return 0;
-	mcp_res = mlx5_ipool_get(priv->sh->ipool[MLX5_IPOOL_MCP],
-				 flow->rix_mreg_copy);
-	if (!mcp_res)
-		return 0;
-	if (!mcp_res->appcnt) {
-		struct rte_flow *mcp_flow = mlx5_ipool_get
-				(priv->sh->ipool[MLX5_IPOOL_RTE_FLOW],
-				mcp_res->rix_flow);
-
-		if (mcp_flow) {
-			ret = flow_drv_apply(dev, mcp_flow, NULL);
-			if (ret)
-				return ret;
-		}
-	}
-	++mcp_res->appcnt;
-	flow->copy_applied = 1;
-	return 0;
-}
-
-/**
- * Stop flow in RX_CP_TBL.
- *
- * @param dev
- *   Pointer to Ethernet device.
- * @flow
- *   Parent flow for wich copying is provided.
- */
-static void
-flow_mreg_stop_copy_action(struct rte_eth_dev *dev,
-			   struct rte_flow *flow)
-{
-	struct mlx5_flow_mreg_copy_resource *mcp_res;
-	struct mlx5_priv *priv = dev->data->dev_private;
-
-	if (!flow->rix_mreg_copy || !flow->copy_applied)
-		return;
-	mcp_res = mlx5_ipool_get(priv->sh->ipool[MLX5_IPOOL_MCP],
-				 flow->rix_mreg_copy);
-	if (!mcp_res)
-		return;
-	MLX5_ASSERT(mcp_res->appcnt);
-	--mcp_res->appcnt;
-	flow->copy_applied = 0;
-	if (!mcp_res->appcnt) {
-		struct rte_flow *mcp_flow = mlx5_ipool_get
-				(priv->sh->ipool[MLX5_IPOOL_RTE_FLOW],
-				mcp_res->rix_flow);
-
-		if (mcp_flow)
-			flow_drv_remove(dev, mcp_flow);
-	}
-}
-
-/**
  * Remove the default copy action from RX_CP_TBL.
  *
  * @param dev
@@ -3703,10 +3593,6 @@ struct mlx5_flow_tunnel_info {
 			if (!mcp_res)
 				return -rte_errno;
 			flow->rix_mreg_copy = mcp_res->idx;
-			if (dev->data->dev_started) {
-				mcp_res->appcnt++;
-				flow->copy_applied = 1;
-			}
 			return 0;
 		case RTE_FLOW_ACTION_TYPE_MARK:
 			mark = (const struct rte_flow_action_mark *)
@@ -3716,10 +3602,6 @@ struct mlx5_flow_tunnel_info {
 			if (!mcp_res)
 				return -rte_errno;
 			flow->rix_mreg_copy = mcp_res->idx;
-			if (dev->data->dev_started) {
-				mcp_res->appcnt++;
-				flow->copy_applied = 1;
-			}
 			return 0;
 		default:
 			break;
@@ -5424,73 +5306,6 @@ struct rte_flow *
 }
 
 /**
- * Remove all flows.
- *
- * @param dev
- *   Pointer to Ethernet device.
- * @param list
- *   Pointer to the Indexed flow list.
- */
-void
-mlx5_flow_stop(struct rte_eth_dev *dev, uint32_t *list)
-{
-	struct mlx5_priv *priv = dev->data->dev_private;
-	struct rte_flow *flow = NULL;
-	uint32_t idx;
-
-	ILIST_FOREACH(priv->sh->ipool[MLX5_IPOOL_RTE_FLOW], *list, idx,
-		      flow, next) {
-		flow_drv_remove(dev, flow);
-		flow_mreg_stop_copy_action(dev, flow);
-	}
-	flow_mreg_del_default_copy_action(dev);
-	flow_rxq_flags_clear(dev);
-}
-
-/**
- * Add all flows.
- *
- * @param dev
- *   Pointer to Ethernet device.
- * @param list
- *   Pointer to the Indexed flow list.
- *
- * @return
- *   0 on success, a negative errno value otherwise and rte_errno is set.
- */
-int
-mlx5_flow_start(struct rte_eth_dev *dev, uint32_t *list)
-{
-	struct mlx5_priv *priv = dev->data->dev_private;
-	struct rte_flow *flow = NULL;
-	struct rte_flow_error error;
-	uint32_t idx;
-	int ret = 0;
-
-	/* Make sure default copy action (reg_c[0] -> reg_b) is created. */
-	ret = flow_mreg_add_default_copy_action(dev, &error);
-	if (ret < 0)
-		return -rte_errno;
-	/* Apply Flows created by application. */
-	ILIST_FOREACH(priv->sh->ipool[MLX5_IPOOL_RTE_FLOW], *list, idx,
-		      flow, next) {
-		ret = flow_mreg_start_copy_action(dev, flow);
-		if (ret < 0)
-			goto error;
-		ret = flow_drv_apply(dev, flow, &error);
-		if (ret < 0)
-			goto error;
-		flow_rxq_flags_set(dev, flow);
-	}
-	return 0;
-error:
-	ret = rte_errno; /* Save rte_errno before cleanup. */
-	mlx5_flow_stop(dev, list);
-	rte_errno = ret; /* Restore rte_errno. */
-	return -rte_errno;
-}
-
-/**
  * Stop all default actions for flows.
  *
  * @param dev
diff --git a/drivers/net/mlx5/mlx5_flow.h b/drivers/net/mlx5/mlx5_flow.h
index 45b9b05..5124914 100644
--- a/drivers/net/mlx5/mlx5_flow.h
+++ b/drivers/net/mlx5/mlx5_flow.h
@@ -520,7 +520,6 @@ struct mlx5_flow_mreg_copy_resource {
 	LIST_ENTRY(mlx5_flow_mreg_copy_resource) next;
 	/* List entry for device flows. */
 	uint32_t refcnt; /* Reference counter. */
-	uint32_t appcnt; /* Apply/Remove counter. */
 	uint32_t idx;
 	uint32_t rix_flow; /* Built flow for copy. */
 };
@@ -926,7 +925,6 @@ struct rte_flow {
 	/**< Device flow handles that are part of the flow. */
 	uint32_t drv_type:2; /**< Driver type. */
 	uint32_t fdir:1; /**< Identifier of associated FDIR if any. */
-	uint32_t copy_applied:1; /**< The MARK copy Flow os applied. */
 	uint32_t meter:16; /**< Holds flow meter id. */
 	uint32_t rix_mreg_copy;
 	/**< Index to metadata register copy table resource. */
-- 
1.8.3.1