dma/xilinx/xdma.c

55  * struct xdma_chan - Driver specific DMA channel structure
65 struct xdma_chan {
96 	struct xdma_chan		*chan;
130 	struct xdma_chan	*h2c_chans;
131 	struct xdma_chan	*c2h_chans;
208 static inline struct xdma_chan *to_xdma_chan(struct dma_chan *chan)
210 	return container_of(chan, struct xdma_chan, vchan.chan);
222 static int xdma_channel_init(struct xdma_chan *chan)
268 xdma_alloc_desc(struct xdma_chan *chan, u32 desc_num, bool cyclic)
325 static int xdma_xfer_start(struct xdma_chan *xchan)
391 static int xdma_xfer_stop(struct xdma_chan *xchan)
413 	struct xdma_chan **chans, *xchan;
498 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
501 	spin_lock_irqsave(&xdma_chan->vchan.lock, flags);
502 	if (vchan_issue_pending(&xdma_chan->vchan))
503 		xdma_xfer_start(xdma_chan);
504 	spin_unlock_irqrestore(&xdma_chan->vchan.lock, flags);
513 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
518 	xdma_xfer_stop(xdma_chan);
520 	spin_lock_irqsave(&xdma_chan->vchan.lock, flags);
522 	xdma_chan->busy = false;
523 	xdma_chan->stop_requested = true;
524 	vd = vchan_next_desc(&xdma_chan->vchan);
530 	vchan_get_all_descriptors(&xdma_chan->vchan, &head);
531 	list_splice_tail(&head, &xdma_chan->vchan.desc_terminated);
533 	spin_unlock_irqrestore(&xdma_chan->vchan.lock, flags);
544 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
545 	struct xdma_device *xdev = xdma_chan->xdev_hdl;
549 	regmap_read(xdev->rmap, xdma_chan->base + XDMA_CHAN_STATUS, &st);
551 		wait_for_completion_timeout(&xdma_chan->last_interrupt, msecs_to_jiffies(1000));
553 	vchan_synchronize(&xdma_chan->vchan);
609 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
619 	sw_desc = xdma_alloc_desc(xdma_chan, desc_num, false);
627 		dev_addr = xdma_chan->cfg.dst_addr;
631 		dev_addr = xdma_chan->cfg.src_addr;
643 	tx_desc = vchan_tx_prep(&xdma_chan->vchan, &sw_desc->vdesc, flags);
670 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
671 	struct xdma_device *xdev = xdma_chan->xdev_hdl;
693 	sw_desc = xdma_alloc_desc(xdma_chan, periods, true);
704 		dev_addr = xdma_chan->cfg.dst_addr;
708 		dev_addr = xdma_chan->cfg.src_addr;
719 	tx_desc = vchan_tx_prep(&xdma_chan->vchan, &sw_desc->vdesc, flags);
745 	struct xdma_chan *xchan = to_xdma_chan(chan);
790 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
792 	memcpy(&xdma_chan->cfg, cfg, sizeof(*cfg));
803 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
805 	vchan_free_chan_resources(&xdma_chan->vchan);
806 	dma_pool_destroy(xdma_chan->desc_pool);
807 	xdma_chan->desc_pool = NULL;
816 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
817 	struct xdma_device *xdev = xdma_chan->xdev_hdl;
827 	xdma_chan->desc_pool = dma_pool_create(dma_chan_name(chan), dev, XDMA_DESC_BLOCK_SIZE,
829 	if (!xdma_chan->desc_pool) {
840 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
852 	spin_lock_irqsave(&xdma_chan->vchan.lock, flags);
854 	vd = vchan_find_desc(&xdma_chan->vchan, cookie);
867 	spin_unlock_irqrestore(&xdma_chan->vchan.lock, flags);
879 	struct xdma_chan *xchan = dev_id;
1108 	struct xdma_chan *xdma_chan = to_xdma_chan(chan);
1111 	return chan_info->dir == xdma_chan->dir;