The RQ object in DevX is used currently only in net driver, but it share
for future.
Add a structure that contains all the resources, and provide creation
and release functions for it.
Signed-off-by: Michael Baum <michae...@nvidia.com>
Acked-by: Matan Azrad <ma...@nvidia.com>
---
drivers/common/mlx5/mlx5_common_devx.c | 116 +++++++++++++++++++++++++++++++++
drivers/common/mlx5/mlx5_common_devx.h | 11 ++++
2 files changed, 127 insertions(+)
diff --git a/drivers/common/mlx5/mlx5_common_devx.c
b/drivers/common/mlx5/mlx5_common_devx.c
index 46404d8..0ac67bd 100644
--- a/drivers/common/mlx5/mlx5_common_devx.c
+++ b/drivers/common/mlx5/mlx5_common_devx.c
@@ -276,4 +276,120 @@
return -rte_errno;
}
+/**
+ * Destroy DevX Receive Queue.
+ *
+ * @param[in] rq
+ * DevX RQ to destroy.
+ */
+void
+mlx5_devx_rq_destroy(struct mlx5_devx_rq *rq)
+{
+ if (rq->rq)
+ claim_zero(mlx5_devx_cmd_destroy(rq->rq));
+ if (rq->umem_obj)
+ claim_zero(mlx5_glue->devx_umem_dereg(rq->umem_obj));
+ if (rq->umem_buf)
+ mlx5_free((void *)(uintptr_t)rq->umem_buf);
+}
+
+/**
+ * Create Receive Queue using DevX API.
+ *
+ * Get a pointer to partially initialized attributes structure, and updates the
+ * following fields:
+ * wq_umem_valid
+ * wq_umem_id
+ * wq_umem_offset
+ * dbr_umem_valid
+ * dbr_umem_id
+ * dbr_addr
+ * log_wq_pg_sz
+ * All other fields are updated by caller.
+ *
+ * @param[in] ctx
+ * Context returned from mlx5 open_device() glue function.
+ * @param[in/out] rq_obj
+ * Pointer to RQ to create.
+ * @param[in] wqe_size
+ * Size of WQE structure.
+ * @param[in] log_wqbb_n
+ * Log of number of WQBBs in queue.
+ * @param[in] attr
+ * Pointer to RQ attributes structure.
+ * @param[in] socket
+ * Socket to use for allocation.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_devx_rq_create(void *ctx, struct mlx5_devx_rq *rq_obj, uint32_t wqe_size,
+ uint16_t log_wqbb_n,
+ struct mlx5_devx_create_rq_attr *attr, int socket)
+{
+ struct mlx5_devx_obj *rq = NULL;
+ struct mlx5dv_devx_umem *umem_obj = NULL;
+ void *umem_buf = NULL;
+ size_t page_size = rte_mem_page_size();
+ size_t alignment = MLX5_WQE_BUF_ALIGNMENT;
+ uint32_t umem_size, umem_dbrec;
+ uint16_t rq_size = 1 << log_wqbb_n;
+ int ret;
+
+ if (page_size == (size_t)-1 || alignment == (size_t)-1) {
+ DRV_LOG(ERR, "Failed to get page_size.");
+ rte_errno = ENOMEM;
+ return -rte_errno;
+ }
+ /* Allocate memory buffer for WQEs and doorbell record. */
+ umem_size = wqe_size * rq_size;
+ umem_dbrec = RTE_ALIGN(umem_size, MLX5_DBR_SIZE);
+ umem_size += MLX5_DBR_SIZE;
+ umem_buf = mlx5_malloc(MLX5_MEM_RTE | MLX5_MEM_ZERO, umem_size,
+ alignment, socket);
+ if (!umem_buf) {
+ DRV_LOG(ERR, "Failed to allocate memory for RQ.");
+ rte_errno = ENOMEM;
+ return -rte_errno;
+ }
+ /* Register allocated buffer in user space with DevX. */
+ umem_obj = mlx5_glue->devx_umem_reg(ctx, (void *)(uintptr_t)umem_buf,
+ umem_size, 0);
+ if (!umem_obj) {
+ DRV_LOG(ERR, "Failed to register umem for RQ.");
+ rte_errno = errno;
+ goto error;
+ }
+ /* Fill attributes for RQ object creation. */
+ attr->wq_attr.wq_umem_valid = 1;
+ attr->wq_attr.wq_umem_id = mlx5_os_get_umem_id(rq_obj->umem_obj);
+ attr->wq_attr.wq_umem_offset = 0;
+ attr->wq_attr.dbr_umem_valid = 1;
+ attr->wq_attr.dbr_umem_id = attr->wq_attr.wq_umem_id;
+ attr->wq_attr.dbr_addr = umem_dbrec;
+ attr->wq_attr.log_wq_pg_sz = rte_log2_u32(page_size);
+ /* Create receive queue object with DevX. */
+ rq = mlx5_devx_cmd_create_rq(ctx, attr, socket);
+ if (!rq) {
+ DRV_LOG(ERR, "Can't create DevX RQ object.");
+ rte_errno = ENOMEM;
+ goto error;
+ }
+ rq_obj->umem_buf = umem_buf;
+ rq_obj->umem_obj = umem_obj;
+ rq_obj->rq = rq;
+ rq_obj->db_rec = RTE_PTR_ADD(rq_obj->umem_buf, umem_dbrec);
+ return 0;
+error:
+ ret = rte_errno;
+ if (rq)
+ claim_zero(mlx5_devx_cmd_destroy(rq));
+ if (umem_obj)
+ claim_zero(mlx5_glue->devx_umem_dereg(umem_obj));
+ if (umem_buf)
+ mlx5_free((void *)(uintptr_t)umem_buf);
+ rte_errno = ret;
+ return -rte_errno;
+}
diff --git a/drivers/common/mlx5/mlx5_common_devx.h
b/drivers/common/mlx5/mlx5_common_devx.h
index 8377d34..1dafbf5 100644
--- a/drivers/common/mlx5/mlx5_common_devx.h
+++ b/drivers/common/mlx5/mlx5_common_devx.h
@@ -30,6 +30,13 @@ struct mlx5_devx_sq {
volatile uint32_t *db_rec; /* The SQ doorbell record. */
};
+/* DevX Receive Queue structure. */
+struct mlx5_devx_rq {
+ struct mlx5_devx_obj *rq; /* The RQ DevX object. */
+ struct mlx5dv_devx_umem *umem_obj; /* The RQ umem object. */
+ volatile void *umem_buf;
+ volatile uint32_t *db_rec; /* The RQ doorbell record. */
+};
/* mlx5_common_devx.c */
@@ -41,5 +48,9 @@ int mlx5_devx_cq_create(void *ctx, struct mlx5_devx_cq
*cq_obj,
int mlx5_devx_sq_create(void *ctx, struct mlx5_devx_sq *sq_obj,
uint16_t log_wqbb_n,
struct mlx5_devx_create_sq_attr *attr, int socket);
+void mlx5_devx_rq_destroy(struct mlx5_devx_rq *rq);
+int mlx5_devx_rq_create(void *ctx, struct mlx5_devx_rq *rq_obj,
+ uint32_t wqe_size, uint16_t log_wqbb_n,
+ struct mlx5_devx_create_rq_attr *attr, int socket);
#endif /* RTE_PMD_MLX5_COMMON_DEVX_H_ */
--
1.8.3.1
