[dpdk-dev] [PATCH 16/17] net/bnxt: synchronize between flow related functions

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

From: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>

Currently, there are four flow related functions, namely
bnxt_flow_create, bnxt_flow_destroy, bnxt_flow_validate,
bnxt_flow_flush. All these functions are not multi-thread safe.

This patch fixes it by synchronizing these functions with a lock.

Reviewed-by: Kalesh Anakkur Purayil <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt.h        |  6 +++++
 drivers/net/bnxt/bnxt_ethdev.c | 23 ++++++++++++++++
 drivers/net/bnxt/bnxt_flow.c   | 49 +++++++++++++++++++++++++++-------
 3 files changed, 69 insertions(+), 9 deletions(-)

diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index 64cc06304..773227048 100644
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -462,6 +462,7 @@ struct bnxt {
 	uint32_t		flow_flags;
 #define BNXT_FLOW_FLAG_L2_HDR_SRC_FILTER_EN	BIT(0)
 
+	pthread_mutex_t         flow_lock;
 	unsigned int		rx_nr_rings;
 	unsigned int		rx_cp_nr_rings;
 	unsigned int		rx_num_qs_per_vnic;
@@ -571,6 +572,11 @@ void bnxt_schedule_fw_health_check(struct bnxt *bp);
 bool is_bnxt_supported(struct rte_eth_dev *dev);
 bool bnxt_stratus_device(struct bnxt *bp);
 extern const struct rte_flow_ops bnxt_flow_ops;
+#define bnxt_acquire_flow_lock(bp) \
+	pthread_mutex_lock(&(bp)->flow_lock)
+
+#define bnxt_release_flow_lock(bp) \
+	pthread_mutex_unlock(&(bp)->flow_lock)
 
 extern int bnxt_logtype_driver;
 #define PMD_DRV_LOG_RAW(level, fmt, args...) \
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 5ef2ee0c4..f5cbc0038 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -4297,6 +4297,17 @@ static int bnxt_init_fw(struct bnxt *bp)
 	return 0;
 }
 
+static int
+bnxt_init_locks(struct bnxt *bp)
+{
+	int err;
+
+	err = pthread_mutex_init(&bp->flow_lock, NULL);
+	if (err)
+		PMD_DRV_LOG(ERR, "Unable to initialize flow_lock\n");
+	return err;
+}
+
 static int bnxt_init_resources(struct bnxt *bp, bool reconfig_dev)
 {
 	int rc;
@@ -4350,6 +4361,10 @@ static int bnxt_init_resources(struct bnxt *bp, bool reconfig_dev)
 	if (rc)
 		return rc;
 
+	rc = bnxt_init_locks(bp);
+	if (rc)
+		return rc;
+
 	return 0;
 }
 
@@ -4430,6 +4445,12 @@ bnxt_dev_init(struct rte_eth_dev *eth_dev)
 	return rc;
 }
 
+static void
+bnxt_uninit_locks(struct bnxt *bp)
+{
+	pthread_mutex_destroy(&bp->flow_lock);
+}
+
 static int
 bnxt_uninit_resources(struct bnxt *bp, bool reconfig_dev)
 {
@@ -4451,6 +4472,8 @@ bnxt_uninit_resources(struct bnxt *bp, bool reconfig_dev)
 		bp->recovery_info = NULL;
 	}
 
+	bnxt_uninit_locks(bp);
+
 	return rc;
 }
 
diff --git a/drivers/net/bnxt/bnxt_flow.c b/drivers/net/bnxt/bnxt_flow.c
index 8156b5b4b..d640a923a 100644
--- a/drivers/net/bnxt/bnxt_flow.c
+++ b/drivers/net/bnxt/bnxt_flow.c
@@ -1385,13 +1385,17 @@ bnxt_flow_validate(struct rte_eth_dev *dev,
 	struct bnxt_filter_info *filter;
 	int ret = 0;
 
+	bnxt_acquire_flow_lock(bp);
 	ret = bnxt_flow_args_validate(attr, pattern, actions, error);
-	if (ret != 0)
+	if (ret != 0) {
+		bnxt_release_flow_lock(bp);
 		return ret;
+	}
 
 	filter = bnxt_get_unused_filter(bp);
 	if (filter == NULL) {
 		PMD_DRV_LOG(ERR, "Not enough resources for a new flow.\n");
+		bnxt_release_flow_lock(bp);
 		return -ENOMEM;
 	}
 
@@ -1423,6 +1427,7 @@ bnxt_flow_validate(struct rte_eth_dev *dev,
 	/* No need to hold on to this filter if we are just validating flow */
 	filter->fw_l2_filter_id = UINT64_MAX;
 	bnxt_free_filter(bp, filter);
+	bnxt_release_flow_lock(bp);
 
 	return ret;
 }
@@ -1535,6 +1540,7 @@ bnxt_flow_create(struct rte_eth_dev *dev,
 		return flow;
 	}
 
+	bnxt_acquire_flow_lock(bp);
 	ret = bnxt_flow_args_validate(attr, pattern, actions, error);
 	if (ret != 0) {
 		PMD_DRV_LOG(ERR, "Not a validate flow.\n");
@@ -1630,6 +1636,7 @@ bnxt_flow_create(struct rte_eth_dev *dev,
 		STAILQ_INSERT_TAIL(&vnic->filter, filter, next);
 		PMD_DRV_LOG(ERR, "Successfully created flow.\n");
 		STAILQ_INSERT_TAIL(&vnic->flow_list, flow, next);
+		bnxt_release_flow_lock(bp);
 		return flow;
 	}
 
@@ -1650,6 +1657,7 @@ bnxt_flow_create(struct rte_eth_dev *dev,
 				   "Failed to create flow.");
 	rte_free(flow);
 	flow = NULL;
+	bnxt_release_flow_lock(bp);
 	return flow;
 }
 
@@ -1700,13 +1708,28 @@ bnxt_flow_destroy(struct rte_eth_dev *dev,
 		  struct rte_flow_error *error)
 {
 	struct bnxt *bp = dev->data->dev_private;
-	struct bnxt_filter_info *filter = flow->filter;
-	struct bnxt_vnic_info *vnic = flow->vnic;
+	struct bnxt_filter_info *filter;
+	struct bnxt_vnic_info *vnic;
 	int ret = 0;
 
+	bnxt_acquire_flow_lock(bp);
+	if (!flow) {
+		rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
+				   "Invalid flow: failed to destroy flow.");
+		bnxt_release_flow_lock(bp);
+		return -EINVAL;
+	}
+
+	filter = flow->filter;
+	vnic = flow->vnic;
+
 	if (!filter) {
-		ret = -EINVAL;
-		goto done;
+		rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
+				   "Invalid flow: failed to destroy flow.");
+		bnxt_release_flow_lock(bp);
+		return -EINVAL;
 	}
 
 	if (filter->filter_type == HWRM_CFA_TUNNEL_REDIRECT_FILTER &&
@@ -1714,10 +1737,12 @@ bnxt_flow_destroy(struct rte_eth_dev *dev,
 		ret = bnxt_handle_tunnel_redirect_destroy(bp,
 							  filter,
 							  error);
-		if (!ret)
+		if (!ret) {
 			goto done;
-		else
+		} else {
+			bnxt_release_flow_lock(bp);
 			return ret;
+		}
 	}
 
 	ret = bnxt_match_filter(bp, filter);
@@ -1756,6 +1781,7 @@ bnxt_flow_destroy(struct rte_eth_dev *dev,
 				   "Failed to destroy flow.");
 	}
 
+	bnxt_release_flow_lock(bp);
 	return ret;
 }
 
@@ -1769,6 +1795,7 @@ bnxt_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *error)
 	unsigned int i;
 	int ret = 0;
 
+	bnxt_acquire_flow_lock(bp);
 	for (i = 0; i < bp->max_vnics; i++) {
 		vnic = &bp->vnic_info[i];
 		if (vnic && vnic->fw_vnic_id == INVALID_VNIC_ID)
@@ -1785,10 +1812,12 @@ bnxt_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *error)
 				bnxt_handle_tunnel_redirect_destroy(bp,
 								    filter,
 								    error);
-				if (!ret)
+				if (!ret) {
 					goto done;
-				else
+				} else {
+					bnxt_release_flow_lock(bp);
 					return ret;
+				}
 			}
 
 			if (filter->filter_type == HWRM_CFA_EM_FILTER)
@@ -1805,6 +1834,7 @@ bnxt_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *error)
 					 RTE_FLOW_ERROR_TYPE_HANDLE,
 					 NULL,
 					 "Failed to flush flow in HW.");
+				bnxt_release_flow_lock(bp);
 				return -rte_errno;
 			}
 done:
@@ -1833,6 +1863,7 @@ bnxt_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *error)
 		}
 	}
 
+	bnxt_release_flow_lock(bp);
 	return ret;
 }
 
-- 
2.20.1 (Apple Git-117)