553 static int crq_queue_create(struct crq_queue *queue, struct srp_target *target)  in crq_queue_create()  argument
558 	queue->msgs = (struct viosrp_crq *) get_zeroed_page(GFP_KERNEL);  in crq_queue_create()
559 	if (!queue->msgs)  in crq_queue_create()
561 	queue->size = PAGE_SIZE / sizeof(*queue->msgs);  in crq_queue_create()
563 	queue->msg_token = dma_map_single(target->dev, queue->msgs,  in crq_queue_create()
564 					  queue->size * sizeof(*queue->msgs),  in crq_queue_create()
567 	if (dma_mapping_error(target->dev, queue->msg_token))  in crq_queue_create()
570 	err = h_reg_crq(vport->dma_dev->unit_address, queue->msg_token,  in crq_queue_create()
581 	    err = h_reg_crq(vport->dma_dev->unit_address, queue->msg_token,  in crq_queue_create()
599 	queue->cur = 0;  in crq_queue_create()
600 	spin_lock_init(&queue->lock);  in crq_queue_create()
610 	dma_unmap_single(target->dev, queue->msg_token,  in crq_queue_create()
611 			 queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);  in crq_queue_create()
613 	free_page((unsigned long) queue->msgs);  in crq_queue_create()
622 	struct crq_queue *queue = &vport->crq_queue;  in crq_queue_destroy()  local
630 	dma_unmap_single(target->dev, queue->msg_token,  in crq_queue_destroy()
631 			 queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);  in crq_queue_destroy()
633 	free_page((unsigned long) queue->msgs);  in crq_queue_destroy()
680 static inline struct viosrp_crq *next_crq(struct crq_queue *queue)  in next_crq()  argument
685 	spin_lock_irqsave(&queue->lock, flags);  in next_crq()
686 	crq = &queue->msgs[queue->cur];  in next_crq()
688 		if (++queue->cur == queue->size)  in next_crq()
689 			queue->cur = 0;  in next_crq()
692 	spin_unlock_irqrestore(&queue->lock, flags);  in next_crq()