dma/sf-pdma/sf-pdma.c

57 	struct sf_pdma_desc *desc;
59 	desc = kzalloc(sizeof(*desc), GFP_NOWAIT);
60 	if (!desc)
63 	desc->chan = chan;
65 	return desc;
68 static void sf_pdma_fill_desc(struct sf_pdma_desc *desc,
71 	desc->xfer_type =  desc->chan->pdma->transfer_type;
72 	desc->xfer_size = size;
73 	desc->dst_addr = dst;
74 	desc->src_addr = src;
89 	struct sf_pdma_desc *desc;
98 	desc = sf_pdma_alloc_desc(chan);
99 	if (!desc)
102 	desc->dirn = DMA_MEM_TO_MEM;
103 	desc->async_tx = vchan_tx_prep(&chan->vchan, &desc->vdesc, flags);
106 	sf_pdma_fill_desc(desc, dest, src, len);
109 	return desc->async_tx;
148 	kfree(chan->desc);
149 	chan->desc = NULL;
163 	struct sf_pdma_desc *desc;
185 		desc = to_sf_pdma_desc(vd);
186 		residue = desc->xfer_size;
218 	kfree(chan->desc);
219 	chan->desc = NULL;
256 	struct sf_pdma_desc *desc = chan->desc;
259 	if (!desc) {
260 		dev_err(chan->pdma->dma_dev.dev, "NULL desc.\n");
264 	writel(desc->xfer_type, regs->xfer_type);
265 	writeq(desc->xfer_size, regs->xfer_size);
266 	writeq(desc->dst_addr, regs->dst_addr);
267 	writeq(desc->src_addr, regs->src_addr);
269 	chan->desc = desc;
281 	if (!chan->desc && vchan_issue_pending(&chan->vchan)) {
282 		/* vchan_issue_pending has made a check that desc in not NULL */
283 		chan->desc = sf_pdma_get_first_pending_desc(chan);
292 	struct sf_pdma_desc *desc;
294 	desc = to_sf_pdma_desc(vdesc);
295 	kfree(desc);
312 	list_del(&chan->desc->vdesc.node);
313 	vchan_cookie_complete(&chan->desc->vdesc);
315 	chan->desc = sf_pdma_get_first_pending_desc(chan);
316 	if (chan->desc)
325 	struct sf_pdma_desc *desc = chan->desc;
332 		dmaengine_desc_get_callback_invoke(desc->async_tx, NULL);
358 		struct sf_pdma_desc *desc = chan->desc;
360 		desc->src_addr += desc->xfer_size - residue;
361 		desc->dst_addr += desc->xfer_size - residue;
362 		desc->xfer_size = residue;