[dpdk-dev] [PATCH v2 2/4] common/mlx5: support DevX virtq stats operations

[Matan Azrad <matan@mellanox.com>]

Add DevX API to create and query virtio queue statistics from the HW.
The next counters are supported by the HW per virtio queue:
	received_desc.
	completed_desc.
	error_cqes.
	bad_desc_errors.
	exceed_max_chain.
	invalid_buffer.

Signed-off-by: Matan Azrad <matan@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---
 drivers/common/mlx5/mlx5_devx_cmds.c            | 73 +++++++++++++++++++++++++
 drivers/common/mlx5/mlx5_devx_cmds.h            | 43 +++++++++++++++
 drivers/common/mlx5/mlx5_prm.h                  | 26 ++++++++-
 drivers/common/mlx5/rte_common_mlx5_version.map |  7 +++
 4 files changed, 148 insertions(+), 1 deletion(-)

diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c b/drivers/common/mlx5/mlx5_devx_cmds.c
index 67c8a8c..c8fc4bb 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.c
+++ b/drivers/common/mlx5/mlx5_devx_cmds.c
@@ -460,6 +460,9 @@ struct mlx5_devx_obj *
 	attr->vdpa.valid = !!(MLX5_GET64(cmd_hca_cap, hcattr,
 					 general_obj_types) &
 			      MLX5_GENERAL_OBJ_TYPES_CAP_VIRTQ_NET_Q);
+	attr->vdpa.queue_counters_valid = !!(MLX5_GET64(cmd_hca_cap, hcattr,
+							general_obj_types) &
+				  MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_Q_COUNTERS);
 	if (attr->qos.sup) {
 		MLX5_SET(query_hca_cap_in, in, op_mod,
 			 MLX5_GET_HCA_CAP_OP_MOD_QOS_CAP |
@@ -1255,6 +1258,7 @@ struct mlx5_devx_obj *
 	MLX5_SET(virtio_q, virtctx, umem_3_id, attr->umems[2].id);
 	MLX5_SET(virtio_q, virtctx, umem_3_size, attr->umems[2].size);
 	MLX5_SET64(virtio_q, virtctx, umem_3_offset, attr->umems[2].offset);
+	MLX5_SET(virtio_q, virtctx, counter_set_id, attr->counters_obj_id);
 	MLX5_SET(virtio_net_q, virtq, tisn_or_qpn, attr->tis_id);
 	virtq_obj->obj = mlx5_glue->devx_obj_create(ctx, in, sizeof(in), out,
 						    sizeof(out));
@@ -1529,3 +1533,72 @@ struct mlx5_devx_obj *
 	}
 	return ret;
 }
+
+struct mlx5_devx_obj *
+mlx5_devx_cmd_create_virtio_q_counters(void *ctx)
+{
+	uint32_t in[MLX5_ST_SZ_DW(create_virtio_q_counters_in)] = {0};
+	uint32_t out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {0};
+	struct mlx5_devx_obj *couners_obj = rte_zmalloc(__func__,
+						       sizeof(*couners_obj), 0);
+	void *hdr = MLX5_ADDR_OF(create_virtio_q_counters_in, in, hdr);
+
+	if (!couners_obj) {
+		DRV_LOG(ERR, "Failed to allocate virtio queue counters data.");
+		rte_errno = ENOMEM;
+		return NULL;
+	}
+	MLX5_SET(general_obj_in_cmd_hdr, hdr, opcode,
+		 MLX5_CMD_OP_CREATE_GENERAL_OBJECT);
+	MLX5_SET(general_obj_in_cmd_hdr, hdr, obj_type,
+		 MLX5_GENERAL_OBJ_TYPE_VIRTIO_Q_COUNTERS);
+	couners_obj->obj = mlx5_glue->devx_obj_create(ctx, in, sizeof(in), out,
+						      sizeof(out));
+	if (!couners_obj->obj) {
+		rte_errno = errno;
+		DRV_LOG(ERR, "Failed to create virtio queue counters Obj using"
+			" DevX.");
+		rte_free(couners_obj);
+		return NULL;
+	}
+	couners_obj->id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
+	return couners_obj;
+}
+
+int
+mlx5_devx_cmd_query_virtio_q_counters(struct mlx5_devx_obj *couners_obj,
+				   struct mlx5_devx_virtio_q_couners_attr *attr)
+{
+	uint32_t in[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)] = {0};
+	uint32_t out[MLX5_ST_SZ_DW(query_virtio_q_counters_out)] = {0};
+	void *hdr = MLX5_ADDR_OF(query_virtio_q_counters_out, in, hdr);
+	void *virtio_q_counters = MLX5_ADDR_OF(query_virtio_q_counters_out, out,
+					       virtio_q_counters);
+	int ret;
+
+	MLX5_SET(general_obj_in_cmd_hdr, hdr, opcode,
+		 MLX5_CMD_OP_QUERY_GENERAL_OBJECT);
+	MLX5_SET(general_obj_in_cmd_hdr, hdr, obj_type,
+		 MLX5_GENERAL_OBJ_TYPE_VIRTIO_Q_COUNTERS);
+	MLX5_SET(general_obj_in_cmd_hdr, hdr, obj_id, couners_obj->id);
+	ret = mlx5_glue->devx_obj_query(couners_obj->obj, in, sizeof(in), out,
+					sizeof(out));
+	if (ret) {
+		DRV_LOG(ERR, "Failed to query virtio q counters using DevX.");
+		rte_errno = errno;
+		return -errno;
+	}
+	attr->received_desc = MLX5_GET64(virtio_q_counters, virtio_q_counters,
+					 received_desc);
+	attr->completed_desc = MLX5_GET64(virtio_q_counters, virtio_q_counters,
+					  completed_desc);
+	attr->error_cqes = MLX5_GET(virtio_q_counters, virtio_q_counters,
+				    error_cqes);
+	attr->bad_desc_errors = MLX5_GET(virtio_q_counters, virtio_q_counters,
+					 bad_desc_errors);
+	attr->exceed_max_chain = MLX5_GET(virtio_q_counters, virtio_q_counters,
+					  exceed_max_chain);
+	attr->invalid_buffer = MLX5_GET(virtio_q_counters, virtio_q_counters,
+					invalid_buffer);
+	return ret;
+}
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h b/drivers/common/mlx5/mlx5_devx_cmds.h
index f7802e6..60db6da 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.h
+++ b/drivers/common/mlx5/mlx5_devx_cmds.h
@@ -64,6 +64,7 @@ struct mlx5_hca_vdpa_attr {
 	uint32_t event_mode:3;
 	uint32_t log_doorbell_stride:5;
 	uint32_t log_doorbell_bar_size:5;
+	uint32_t queue_counters_valid:1;
 	uint32_t max_num_virtio_queues;
 	struct {
 		uint32_t a;
@@ -270,6 +271,7 @@ struct mlx5_devx_virtq_attr {
 	uint32_t qp_id;
 	uint32_t queue_index;
 	uint32_t tis_id;
+	uint32_t counters_obj_id;
 	uint64_t dirty_bitmap_addr;
 	uint64_t type;
 	uint64_t desc_addr;
@@ -298,6 +300,15 @@ struct mlx5_devx_qp_attr {
 	uint64_t wq_umem_offset;
 };
 
+struct mlx5_devx_virtio_q_couners_attr {
+	uint64_t received_desc;
+	uint64_t completed_desc;
+	uint32_t error_cqes;
+	uint32_t bad_desc_errors;
+	uint32_t exceed_max_chain;
+	uint32_t invalid_buffer;
+};
+
 /* mlx5_devx_cmds.c */
 
 struct mlx5_devx_obj *mlx5_devx_cmd_flow_counter_alloc(struct ibv_context *ctx,
@@ -348,5 +359,37 @@ int mlx5_devx_cmd_modify_qp_state(struct mlx5_devx_obj *qp,
 				  uint32_t qp_st_mod_op, uint32_t remote_qp_id);
 int mlx5_devx_cmd_modify_rqt(struct mlx5_devx_obj *rqt,
 			     struct mlx5_devx_rqt_attr *rqt_attr);
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Create virtio queue counters object DevX API.
+ *
+ * @param[in] ctx
+ *   Device context.
+
+ * @return
+ *   The DevX object created, NULL otherwise and rte_errno is set.
+ */
+__rte_experimental
+struct mlx5_devx_obj *mlx5_devx_cmd_create_virtio_q_counters(void *ctx);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Query virtio queue counters object using DevX API.
+ *
+ * @param[in] couners_obj
+ *   Pointer to virtq object structure.
+ * @param [in/out] attr
+ *   Pointer to virtio queue counters attributes structure.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+__rte_experimental
+int mlx5_devx_cmd_query_virtio_q_counters(struct mlx5_devx_obj *couners_obj,
+				  struct mlx5_devx_virtio_q_couners_attr *attr);
 
 #endif /* RTE_PMD_MLX5_DEVX_CMDS_H_ */
diff --git a/drivers/common/mlx5/mlx5_prm.h b/drivers/common/mlx5/mlx5_prm.h
index 4ab1c75..eefaf26 100644
--- a/drivers/common/mlx5/mlx5_prm.h
+++ b/drivers/common/mlx5/mlx5_prm.h
@@ -947,6 +947,7 @@ enum {
 
 enum {
 	MLX5_GENERAL_OBJ_TYPES_CAP_VIRTQ_NET_Q = (1ULL << 0xd),
+	MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_Q_COUNTERS = (1ULL << 0x1c),
 };
 
 enum {
@@ -2003,6 +2004,7 @@ struct mlx5_ifc_create_cq_in_bits {
 
 enum {
 	MLX5_GENERAL_OBJ_TYPE_VIRTQ = 0x000d,
+	MLX5_GENERAL_OBJ_TYPE_VIRTIO_Q_COUNTERS = 0x001c,
 };
 
 struct mlx5_ifc_general_obj_in_cmd_hdr_bits {
@@ -2021,6 +2023,27 @@ struct mlx5_ifc_general_obj_out_cmd_hdr_bits {
 	u8 reserved_at_60[0x20];
 };
 
+struct mlx5_ifc_virtio_q_counters_bits {
+	u8 modify_field_select[0x40];
+	u8 reserved_at_40[0x40];
+	u8 received_desc[0x40];
+	u8 completed_desc[0x40];
+	u8 error_cqes[0x20];
+	u8 bad_desc_errors[0x20];
+	u8 exceed_max_chain[0x20];
+	u8 invalid_buffer[0x20];
+	u8 reserved_at_180[0x50];
+};
+
+struct mlx5_ifc_create_virtio_q_counters_in_bits {
+	struct mlx5_ifc_general_obj_in_cmd_hdr_bits hdr;
+	struct mlx5_ifc_virtio_q_counters_bits virtio_q_counters;
+};
+
+struct mlx5_ifc_query_virtio_q_counters_out_bits {
+	struct mlx5_ifc_general_obj_in_cmd_hdr_bits hdr;
+	struct mlx5_ifc_virtio_q_counters_bits virtio_q_counters;
+};
 enum {
 	MLX5_VIRTQ_STATE_INIT = 0,
 	MLX5_VIRTQ_STATE_RDY = 1,
@@ -2061,7 +2084,8 @@ struct mlx5_ifc_virtio_q_bits {
 	u8 umem_3_id[0x20];
 	u8 umem_3_size[0x20];
 	u8 umem_3_offset[0x40];
-	u8 reserved_at_300[0x100];
+	u8 counter_set_id[0x20];
+	u8 reserved_at_320[0xe0];
 };
 
 struct mlx5_ifc_virtio_net_q_bits {
diff --git a/drivers/common/mlx5/rte_common_mlx5_version.map b/drivers/common/mlx5/rte_common_mlx5_version.map
index b58a378..8c2d224 100644
--- a/drivers/common/mlx5/rte_common_mlx5_version.map
+++ b/drivers/common/mlx5/rte_common_mlx5_version.map
@@ -76,3 +76,10 @@ EXPERIMENTAL {
 	mlx5_mr_create_primary;
 	mlx5_mr_flush_local_cache;
 };
+
+EXPERIMENTAL {
+	global:
+
+	mlx5_devx_cmd_create_virtio_q_counters;
+	mlx5_devx_cmd_query_virtio_q_counters;
+};
-- 
1.8.3.1