dma/hsu/hsu.c

65 	struct hsu_dma_desc *desc = hsuc->desc;
85 	count = desc->nents - desc->active;
87 		hsu_chan_writel(hsuc, HSU_CH_DxSAR(i), desc->sg[i].addr);
88 		hsu_chan_writel(hsuc, HSU_CH_DxTSR(i), desc->sg[i].len);
94 		desc->active++;
123 		hsuc->desc = NULL;
128 	hsuc->desc = to_hsu_dma_desc(vdesc);
214 	struct hsu_dma_desc *desc;
225 	desc = hsuc->desc;
226 	if (desc) {
228 			desc->status = DMA_ERROR;
229 		} else if (desc->active < desc->nents) {
232 			vchan_cookie_complete(&desc->vdesc);
233 			desc->status = DMA_COMPLETE;
234 			stat->bytes_transferred += desc->length;
246 	struct hsu_dma_desc *desc;
248 	desc = kzalloc(sizeof(*desc), GFP_NOWAIT);
249 	if (!desc)
252 	desc->sg = kcalloc(nents, sizeof(*desc->sg), GFP_NOWAIT);
253 	if (!desc->sg) {
254 		kfree(desc);
258 	return desc;
263 	struct hsu_dma_desc *desc = to_hsu_dma_desc(vdesc);
265 	kfree(desc->sg);
266 	kfree(desc);
275 	struct hsu_dma_desc *desc;
279 	desc = hsu_dma_alloc_desc(sg_len);
280 	if (!desc)
284 		desc->sg[i].addr = sg_dma_address(sg);
285 		desc->sg[i].len = sg_dma_len(sg);
287 		desc->length += sg_dma_len(sg);
290 	desc->nents = sg_len;
291 	desc->direction = direction;
292 	/* desc->active = 0 by kzalloc */
293 	desc->status = DMA_IN_PROGRESS;
295 	return vchan_tx_prep(&hsuc->vchan, &desc->vdesc, flags);
304 	if (vchan_issue_pending(&hsuc->vchan) && !hsuc->desc)
311 	struct hsu_dma_desc *desc = hsuc->desc;
315 	for (i = desc->active; i < desc->nents; i++)
316 		bytes += desc->sg[i].len;
341 	if (hsuc->desc && cookie == hsuc->desc->vdesc.tx.cookie) {
344 		status = hsuc->desc->status;
370 	if (hsuc->desc && hsuc->desc->status == DMA_IN_PROGRESS) {
372 		hsuc->desc->status = DMA_PAUSED;
385 	if (hsuc->desc && hsuc->desc->status == DMA_PAUSED) {
386 		hsuc->desc->status = DMA_IN_PROGRESS;
403 	if (hsuc->desc) {
404 		hsu_dma_desc_free(&hsuc->desc->vdesc);
405 		hsuc->desc = NULL;