- mlx5_txq_release_devx_sq_resources(txq_obj);
- mlx5_txq_release_devx_cq_resources(txq_obj);
-}
-
-/**
- * Create a DevX CQ object and its resources for an Tx queue.
- *
- * @param dev
- * Pointer to Ethernet device.
- * @param idx
- * Queue index in DPDK Tx queue array.
- *
- * @return
- * Number of CQEs in CQ, 0 otherwise and rte_errno is set.
- */
-static uint32_t
-mlx5_txq_create_devx_cq_resources(struct rte_eth_dev *dev, uint16_t idx)
-{
- struct mlx5_priv *priv = dev->data->dev_private;
- struct mlx5_txq_data *txq_data = (*priv->txqs)[idx];
- struct mlx5_txq_ctrl *txq_ctrl =
- container_of(txq_data, struct mlx5_txq_ctrl, txq);
- struct mlx5_txq_obj *txq_obj = txq_ctrl->obj;
- struct mlx5_devx_cq_attr cq_attr = { 0 };
- struct mlx5_cqe *cqe;
- size_t page_size;
- size_t alignment;
- uint32_t cqe_n;
- uint32_t i;
- int ret;
-
- MLX5_ASSERT(txq_data);
- MLX5_ASSERT(txq_obj);
- page_size = rte_mem_page_size();
- if (page_size == (size_t)-1) {
- DRV_LOG(ERR, "Failed to get mem page size.");
- rte_errno = ENOMEM;
- return 0;
- }
- /* Allocate memory buffer for CQEs. */
- alignment = MLX5_CQE_BUF_ALIGNMENT;
- if (alignment == (size_t)-1) {
- DRV_LOG(ERR, "Failed to get CQE buf alignment.");
- rte_errno = ENOMEM;
- return 0;
- }
- /* Create the Completion Queue. */
- cqe_n = (1UL << txq_data->elts_n) / MLX5_TX_COMP_THRESH +
- 1 + MLX5_TX_COMP_THRESH_INLINE_DIV;
- cqe_n = 1UL << log2above(cqe_n);
- if (cqe_n > UINT16_MAX) {
- DRV_LOG(ERR,
- "Port %u Tx queue %u requests to many CQEs %u.",
- dev->data->port_id, txq_data->idx, cqe_n);
- rte_errno = EINVAL;
- return 0;
- }
- txq_obj->cq_buf = mlx5_malloc(MLX5_MEM_RTE | MLX5_MEM_ZERO,
- cqe_n * sizeof(struct mlx5_cqe),
- alignment,
- priv->sh->numa_node);
- if (!txq_obj->cq_buf) {
- DRV_LOG(ERR,
- "Port %u Tx queue %u cannot allocate memory (CQ).",
- dev->data->port_id, txq_data->idx);
- rte_errno = ENOMEM;
- return 0;
- }
- /* Register allocated buffer in user space with DevX. */
- txq_obj->cq_umem = mlx5_glue->devx_umem_reg(priv->sh->ctx,
- (void *)txq_obj->cq_buf,
- cqe_n * sizeof(struct mlx5_cqe),
- IBV_ACCESS_LOCAL_WRITE);
- if (!txq_obj->cq_umem) {
- rte_errno = errno;
- DRV_LOG(ERR,
- "Port %u Tx queue %u cannot register memory (CQ).",
- dev->data->port_id, txq_data->idx);
- goto error;
- }
- /* Allocate doorbell record for completion queue. */
- txq_obj->cq_dbrec_offset = mlx5_get_dbr(priv->sh->ctx,
- &priv->dbrpgs,
- &txq_obj->cq_dbrec_page);
- if (txq_obj->cq_dbrec_offset < 0) {
- rte_errno = errno;
- DRV_LOG(ERR, "Failed to allocate CQ door-bell.");
- goto error;
- }
- cq_attr.cqe_size = (sizeof(struct mlx5_cqe) == 128) ?
- MLX5_CQE_SIZE_128B : MLX5_CQE_SIZE_64B;
- cq_attr.uar_page_id = mlx5_os_get_devx_uar_page_id(priv->sh->tx_uar);
- cq_attr.eqn = priv->sh->eqn;
- cq_attr.q_umem_valid = 1;
- cq_attr.q_umem_offset = (uintptr_t)txq_obj->cq_buf % page_size;
- cq_attr.q_umem_id = mlx5_os_get_umem_id(txq_obj->cq_umem);
- cq_attr.db_umem_valid = 1;
- cq_attr.db_umem_offset = txq_obj->cq_dbrec_offset;
- cq_attr.db_umem_id = mlx5_os_get_umem_id(txq_obj->cq_dbrec_page->umem);
- cq_attr.log_cq_size = rte_log2_u32(cqe_n);
- cq_attr.log_page_size = rte_log2_u32(page_size);
- /* Create completion queue object with DevX. */
- txq_obj->cq_devx = mlx5_devx_cmd_create_cq(priv->sh->ctx, &cq_attr);
- if (!txq_obj->cq_devx) {
- rte_errno = errno;
- DRV_LOG(ERR, "Port %u Tx queue %u CQ creation failure.",
- dev->data->port_id, idx);
- goto error;
- }
- /* Initial fill CQ buffer with invalid CQE opcode. */
- cqe = (struct mlx5_cqe *)txq_obj->cq_buf;
- for (i = 0; i < cqe_n; i++) {
- cqe->op_own = (MLX5_CQE_INVALID << 4) | MLX5_CQE_OWNER_MASK;
- ++cqe;
- }
- return cqe_n;
-error:
- ret = rte_errno;
- mlx5_txq_release_devx_cq_resources(txq_obj);
- rte_errno = ret;
- return 0;