Function gdma_post_work_request

dpdk/drivers/net/mana/gdma.c:123–167

* Post a work request to queue. */

 * Post a work request to queue.
 */
int
gdma_post_work_request(struct mana_gdma_queue *queue,
		       struct gdma_work_request *work_req,
		       uint32_t *wqe_size_in_bu)
{
	uint32_t client_oob_size =
		work_req->inline_oob_size_in_bytes >
				INLINE_OOB_SMALL_SIZE_IN_BYTES ?
			INLINE_OOB_LARGE_SIZE_IN_BYTES :
			INLINE_OOB_SMALL_SIZE_IN_BYTES;

	uint32_t sgl_data_size = sizeof(struct gdma_sgl_element) *
			RTE_MAX((uint32_t)1, work_req->num_sgl_elements);
	uint32_t wqe_size =
		RTE_ALIGN(sizeof(struct gdma_wqe_dma_oob) +
				client_oob_size + sgl_data_size,
			  GDMA_WQE_ALIGNMENT_UNIT_SIZE);
	uint8_t *wq_buffer_pointer;
	uint32_t queue_free_units = queue->count - (queue->head - queue->tail);

	if (wqe_size / GDMA_WQE_ALIGNMENT_UNIT_SIZE > queue_free_units) {
		DP_LOG(DEBUG, "WQE size %u queue count %u head %u tail %u",
		       wqe_size, queue->count, queue->head, queue->tail);
		return -EBUSY;
	}

	DP_LOG(DEBUG, "client_oob_size %u sgl_data_size %u wqe_size %u",
	       client_oob_size, sgl_data_size, wqe_size);

	*wqe_size_in_bu = wqe_size / GDMA_WQE_ALIGNMENT_UNIT_SIZE;

	wq_buffer_pointer = gdma_get_wqe_pointer(queue);
	wq_buffer_pointer += write_dma_client_oob(wq_buffer_pointer, work_req,
						  client_oob_size);
	if (wq_buffer_pointer >= ((uint8_t *)queue->buffer) + queue->size)
		wq_buffer_pointer -= queue->size;

	write_scatter_gather_list((uint8_t *)queue->buffer,
				  (uint8_t *)queue->buffer + queue->size,
				  wq_buffer_pointer, work_req);

	queue->head += wqe_size / GDMA_WQE_ALIGNMENT_UNIT_SIZE;

	return 0;
}

#ifdef RTE_ARCH_32
union gdma_short_doorbell_entry {