[dpdk-dev] [PATCH 11/17] net/mlx5: add translation for CT action

[Bing Zhao]

When creating a flow with this action context for CT, it needs to be
translated in 2 levels.
First, retrieve from action context to RTE_FLOW action.
Second, translate it to the correct DR action with traffic direction.

Before using the DR action in a flow, the CT context should be
available to use in the hardware.

Signed-off-by: Bing Zhao <bingz at nvidia.com>
---
 drivers/net/mlx5/mlx5.h          |  3 ++-
 drivers/net/mlx5/mlx5_flow.c     |  9 +++++++++
 drivers/net/mlx5/mlx5_flow.h     |  1 +
 drivers/net/mlx5/mlx5_flow_aso.c | 40 ++++++++++++++++++++++++++++++++++++++++
 drivers/net/mlx5/mlx5_flow_dv.c  | 18 ++++++++++++++++++
 5 files changed, 70 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index f999828..3b67706 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -1716,6 +1716,7 @@ int mlx5_aso_ct_wait_ready(struct mlx5_dev_ctx_shared *sh,
 int mlx5_aso_ct_query_by_wqe(struct mlx5_dev_ctx_shared *sh,
 			     struct mlx5_aso_ct_action *ct,
 			     struct rte_flow_action_conntrack *profile);
-
+int mlx5_aso_ct_available(struct mlx5_dev_ctx_shared *sh,
+			  struct mlx5_aso_ct_action *ct);
 
 #endif /* RTE_PMD_MLX5_H_ */
diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 1c28b63..7b9f055 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -3552,6 +3552,15 @@ flow_action_handles_translate(struct rte_eth_dev *dev,
 				break;
 			}
 			/* Fall-through */
+		case MLX5_INDIRECT_ACTION_TYPE_CT:
+			if (priv->sh->ct_aso_en) {
+				translated[handle->index].type =
+					RTE_FLOW_ACTION_TYPE_CONNTRACK;
+				translated[handle->index].conf =
+							 (void *)(uintptr_t)idx;
+				break;
+			}
+			/* Fall-through */
 		default:
 			mlx5_free(translated);
 			return rte_flow_error_set
diff --git a/drivers/net/mlx5/mlx5_flow.h b/drivers/net/mlx5/mlx5_flow.h
index 988b171..ddfc517 100644
--- a/drivers/net/mlx5/mlx5_flow.h
+++ b/drivers/net/mlx5/mlx5_flow.h
@@ -226,6 +226,7 @@ enum mlx5_feature_name {
 #define MLX5_FLOW_ACTION_TUNNEL_MATCH (1ull << 38)
 #define MLX5_FLOW_ACTION_MODIFY_FIELD (1ull << 39)
 #define MLX5_FLOW_ACTION_METER_WITH_TERMINATED_POLICY (1ull << 40)
+#define MLX5_FLOW_ACTION_CT (1ull << 41)
 
 #define MLX5_FLOW_FATE_ACTIONS \
 	(MLX5_FLOW_ACTION_DROP | MLX5_FLOW_ACTION_QUEUE | \
diff --git a/drivers/net/mlx5/mlx5_flow_aso.c b/drivers/net/mlx5/mlx5_flow_aso.c
index 12e8dc7..21de855 100644
--- a/drivers/net/mlx5/mlx5_flow_aso.c
+++ b/drivers/net/mlx5/mlx5_flow_aso.c
@@ -1394,3 +1394,43 @@ mlx5_aso_ct_query_by_wqe(struct mlx5_dev_ctx_shared *sh,
 		mlx5_aso_ct_obj_analyze(profile, out_data);
 	return ret;
 }
+
+/*
+ * Make sure the conntrack context is synchronized with hardware before
+ * creating a flow rule that uses it.
+ *
+ * @param[in] sh
+ *   Pointer to shared device context.
+ * @param[in] ct
+ *   Pointer to connection tracking offload object.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_aso_ct_available(struct mlx5_dev_ctx_shared *sh,
+		      struct mlx5_aso_ct_action *ct)
+{
+	struct mlx5_aso_ct_pools_mng *mng = sh->ct_mng;
+	uint32_t poll_cqe_times = MLX5_CT_POLL_WQE_CQE_TIMES;
+	uint8_t state = __atomic_load_n(&ct->state, __ATOMIC_RELAXED);
+
+	if (state == ASO_CONNTRACK_FREE) {
+		rte_errno = ENXIO;
+		return -rte_errno;
+	} else if (state == ASO_CONNTRACK_READY ||
+		   state == ASO_CONNTRACK_QUERY) {
+		return 0;
+	}
+	do {
+		mlx5_aso_ct_completion_handle(mng);
+		state = __atomic_load_n(&ct->state, __ATOMIC_RELAXED);
+		if (state == ASO_CONNTRACK_READY ||
+		    state == ASO_CONNTRACK_QUERY)
+			return 0;
+		/* Waiting for CQE ready, consider should block or sleep. */
+		rte_delay_us_sleep(MLX5_ASO_WQE_CQE_RESPONSE_DELAY);
+	} while (--poll_cqe_times);
+	rte_errno = EBUSY;
+	return -rte_errno;
+}
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index f4fa3a0..3ebeb58 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -11373,6 +11373,7 @@ flow_dv_translate_create_conntrack(struct rte_eth_dev *dev,
 		return rte_flow_error_set(error, EBUSY,
 					  RTE_FLOW_ERROR_TYPE_ACTION, NULL,
 					  "Failed to update CT");
+	ct->is_original = !!pro->is_original_dir;
 	return idx;
 }
 
@@ -11529,6 +11530,8 @@ flow_dv_translate(struct rte_eth_dev *dev,
 		const struct rte_flow_action *found_action = NULL;
 		uint32_t jump_group = 0;
 		struct mlx5_flow_counter *cnt;
+		uint32_t ct_idx;
+		struct mlx5_aso_ct_action *ct;
 
 		if (!mlx5_flow_os_action_supported(action_type))
 			return rte_flow_error_set(error, ENOTSUP,
@@ -12002,6 +12005,21 @@ flow_dv_translate(struct rte_eth_dev *dev,
 				return -rte_errno;
 			action_flags |= MLX5_FLOW_ACTION_MODIFY_FIELD;
 			break;
+		case RTE_FLOW_ACTION_TYPE_CONNTRACK:
+			ct_idx = (uint32_t)(uintptr_t)action->conf;
+			ct = flow_aso_ct_get_by_idx(dev, ct_idx);
+			if (mlx5_aso_ct_available(priv->sh, ct))
+				return -rte_errno;
+			if (ct->is_original)
+				dev_flow->dv.actions[actions_n] =
+							ct->dr_action_orig;
+			else
+				dev_flow->dv.actions[actions_n] =
+							ct->dr_action_rply;
+			__atomic_fetch_add(&ct->refcnt, 1, __ATOMIC_RELAXED);
+			actions_n++;
+			action_flags |= MLX5_FLOW_ACTION_CT;
+			break;
 		case RTE_FLOW_ACTION_TYPE_END:
 			actions_end = true;
 			if (mhdr_res->actions_num) {
-- 
2.5.5