[PATCH 20.11] net/hns3: fix traffic management thread safety

[Chengwen Feng]

[ upstream commit 69901040975bff8a38edfc47aee727cadc87d356 ]

The driver-related TM (traffic management) info is implemented through
the linked list. The following threads are involved in the read and
write of the TM info:

1. main thread: invokes the rte_tm_xxx() API family to modify or read.
2. interrupt thread: will read TM info in reset recover process.

Currently, thread safety protection of TM info is implemented only in
the following operations:
1. some of the rte_tm_xxx() API's implementation.
2. reset recover process.

Thread safety risks may exist in other scenarios, so fix by make sure
all the rte_tm_xxx() API's implementations protected by hw.lock.

Fixes: c09c7847d892 ("net/hns3: support traffic management")

Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3 at huawei.com>
---
 drivers/net/hns3/hns3_tm.c | 173 ++++++++++++++++++++++++++++++++-----
 1 file changed, 150 insertions(+), 23 deletions(-)

diff --git a/drivers/net/hns3/hns3_tm.c b/drivers/net/hns3/hns3_tm.c
index e1089b6bd0..67402a700f 100644
--- a/drivers/net/hns3/hns3_tm.c
+++ b/drivers/net/hns3/hns3_tm.c
@@ -1081,21 +1081,6 @@ hns3_tm_hierarchy_commit(struct rte_eth_dev *dev,
 	return -EINVAL;
 }
 
-static int
-hns3_tm_hierarchy_commit_wrap(struct rte_eth_dev *dev,
-			      int clear_on_fail,
-			      struct rte_tm_error *error)
-{
-	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
-	int ret;
-
-	rte_spinlock_lock(&hw->lock);
-	ret = hns3_tm_hierarchy_commit(dev, clear_on_fail, error);
-	rte_spinlock_unlock(&hw->lock);
-
-	return ret;
-}
-
 static int
 hns3_tm_node_shaper_do_update(struct hns3_hw *hw,
 			      uint32_t node_id,
@@ -1195,6 +1180,148 @@ hns3_tm_node_shaper_update(struct rte_eth_dev *dev,
 	return 0;
 }
 
+static int
+hns3_tm_capabilities_get_wrap(struct rte_eth_dev *dev,
+			      struct rte_tm_capabilities *cap,
+			      struct rte_tm_error *error)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int ret;
+
+	rte_spinlock_lock(&hw->lock);
+	ret = hns3_tm_capabilities_get(dev, cap, error);
+	rte_spinlock_unlock(&hw->lock);
+
+	return ret;
+}
+
+static int
+hns3_tm_shaper_profile_add_wrap(struct rte_eth_dev *dev,
+				uint32_t shaper_profile_id,
+				struct rte_tm_shaper_params *profile,
+				struct rte_tm_error *error)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int ret;
+
+	rte_spinlock_lock(&hw->lock);
+	ret = hns3_tm_shaper_profile_add(dev, shaper_profile_id, profile, error);
+	rte_spinlock_unlock(&hw->lock);
+
+	return ret;
+}
+
+static int
+hns3_tm_shaper_profile_del_wrap(struct rte_eth_dev *dev,
+				uint32_t shaper_profile_id,
+				struct rte_tm_error *error)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int ret;
+
+	rte_spinlock_lock(&hw->lock);
+	ret = hns3_tm_shaper_profile_del(dev, shaper_profile_id, error);
+	rte_spinlock_unlock(&hw->lock);
+
+	return ret;
+}
+
+static int
+hns3_tm_node_add_wrap(struct rte_eth_dev *dev, uint32_t node_id,
+		      uint32_t parent_node_id, uint32_t priority,
+		      uint32_t weight, uint32_t level_id,
+		      struct rte_tm_node_params *params,
+		      struct rte_tm_error *error)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int ret;
+
+	rte_spinlock_lock(&hw->lock);
+	ret = hns3_tm_node_add(dev, node_id, parent_node_id, priority,
+			       weight, level_id, params, error);
+	rte_spinlock_unlock(&hw->lock);
+
+	return ret;
+}
+
+static int
+hns3_tm_node_delete_wrap(struct rte_eth_dev *dev,
+			 uint32_t node_id,
+			 struct rte_tm_error *error)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int ret;
+
+	rte_spinlock_lock(&hw->lock);
+	ret = hns3_tm_node_delete(dev, node_id, error);
+	rte_spinlock_unlock(&hw->lock);
+
+	return ret;
+}
+
+static int
+hns3_tm_node_type_get_wrap(struct rte_eth_dev *dev,
+			   uint32_t node_id,
+			   int *is_leaf,
+			   struct rte_tm_error *error)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int ret;
+
+	rte_spinlock_lock(&hw->lock);
+	ret = hns3_tm_node_type_get(dev, node_id, is_leaf, error);
+	rte_spinlock_unlock(&hw->lock);
+
+	return ret;
+}
+
+static int
+hns3_tm_level_capabilities_get_wrap(struct rte_eth_dev *dev,
+				    uint32_t level_id,
+				    struct rte_tm_level_capabilities *cap,
+				    struct rte_tm_error *error)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int ret;
+
+	rte_spinlock_lock(&hw->lock);
+	ret = hns3_tm_level_capabilities_get(dev, level_id, cap, error);
+	rte_spinlock_unlock(&hw->lock);
+
+	return ret;
+}
+
+static int
+hns3_tm_node_capabilities_get_wrap(struct rte_eth_dev *dev,
+				   uint32_t node_id,
+				   struct rte_tm_node_capabilities *cap,
+				   struct rte_tm_error *error)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int ret;
+
+	rte_spinlock_lock(&hw->lock);
+	ret = hns3_tm_node_capabilities_get(dev, node_id, cap, error);
+	rte_spinlock_unlock(&hw->lock);
+
+	return ret;
+}
+
+static int
+hns3_tm_hierarchy_commit_wrap(struct rte_eth_dev *dev,
+			      int clear_on_fail,
+			      struct rte_tm_error *error)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	int ret;
+
+	rte_spinlock_lock(&hw->lock);
+	ret = hns3_tm_hierarchy_commit(dev, clear_on_fail, error);
+	rte_spinlock_unlock(&hw->lock);
+
+	return ret;
+}
+
 static int
 hns3_tm_node_shaper_update_wrap(struct rte_eth_dev *dev,
 				uint32_t node_id,
@@ -1213,14 +1340,14 @@ hns3_tm_node_shaper_update_wrap(struct rte_eth_dev *dev,
 }
 
 static const struct rte_tm_ops hns3_tm_ops = {
-	.capabilities_get       = hns3_tm_capabilities_get,
-	.shaper_profile_add     = hns3_tm_shaper_profile_add,
-	.shaper_profile_delete  = hns3_tm_shaper_profile_del,
-	.node_add               = hns3_tm_node_add,
-	.node_delete            = hns3_tm_node_delete,
-	.node_type_get          = hns3_tm_node_type_get,
-	.level_capabilities_get = hns3_tm_level_capabilities_get,
-	.node_capabilities_get  = hns3_tm_node_capabilities_get,
+	.capabilities_get       = hns3_tm_capabilities_get_wrap,
+	.shaper_profile_add     = hns3_tm_shaper_profile_add_wrap,
+	.shaper_profile_delete  = hns3_tm_shaper_profile_del_wrap,
+	.node_add               = hns3_tm_node_add_wrap,
+	.node_delete            = hns3_tm_node_delete_wrap,
+	.node_type_get          = hns3_tm_node_type_get_wrap,
+	.level_capabilities_get = hns3_tm_level_capabilities_get_wrap,
+	.node_capabilities_get  = hns3_tm_node_capabilities_get_wrap,
 	.hierarchy_commit       = hns3_tm_hierarchy_commit_wrap,
 	.node_shaper_update     = hns3_tm_node_shaper_update_wrap,
 };
-- 
2.17.1