60 	struct hsu_dma_desc *desc = hsuc->desc;  in hsu_dma_chan_start()  local
80 	count = (desc->nents - desc->active) % HSU_DMA_CHAN_NR_DESC;  in hsu_dma_chan_start()
82 		hsu_chan_writel(hsuc, HSU_CH_DxSAR(i), desc->sg[i].addr);  in hsu_dma_chan_start()
83 		hsu_chan_writel(hsuc, HSU_CH_DxTSR(i), desc->sg[i].len);  in hsu_dma_chan_start()
89 		desc->active++;  in hsu_dma_chan_start()
118 		hsuc->desc = NULL;  in hsu_dma_start_transfer()
123 	hsuc->desc = to_hsu_dma_desc(vdesc);  in hsu_dma_start_transfer()
144 	struct hsu_dma_desc *desc;  in hsu_dma_irq()  local
171 	desc = hsuc->desc;  in hsu_dma_irq()
172 	if (desc) {  in hsu_dma_irq()
174 			desc->status = DMA_ERROR;  in hsu_dma_irq()
175 		} else if (desc->active < desc->nents) {  in hsu_dma_irq()
178 			vchan_cookie_complete(&desc->vdesc);  in hsu_dma_irq()
179 			desc->status = DMA_COMPLETE;  in hsu_dma_irq()
191 	struct hsu_dma_desc *desc;  in hsu_dma_alloc_desc()  local
193 	desc = kzalloc(sizeof(*desc), GFP_NOWAIT);  in hsu_dma_alloc_desc()
194 	if (!desc)  in hsu_dma_alloc_desc()
197 	desc->sg = kcalloc(nents, sizeof(*desc->sg), GFP_NOWAIT);  in hsu_dma_alloc_desc()
198 	if (!desc->sg) {  in hsu_dma_alloc_desc()
199 		kfree(desc);  in hsu_dma_alloc_desc()
203 	return desc;  in hsu_dma_alloc_desc()
208 	struct hsu_dma_desc *desc = to_hsu_dma_desc(vdesc);  in hsu_dma_desc_free()  local
210 	kfree(desc->sg);  in hsu_dma_desc_free()
211 	kfree(desc);  in hsu_dma_desc_free()
220 	struct hsu_dma_desc *desc;  in hsu_dma_prep_slave_sg()  local
224 	desc = hsu_dma_alloc_desc(sg_len);  in hsu_dma_prep_slave_sg()
225 	if (!desc)  in hsu_dma_prep_slave_sg()
229 		desc->sg[i].addr = sg_dma_address(sg);  in hsu_dma_prep_slave_sg()
230 		desc->sg[i].len = sg_dma_len(sg);  in hsu_dma_prep_slave_sg()
233 	desc->nents = sg_len;  in hsu_dma_prep_slave_sg()
234 	desc->direction = direction;  in hsu_dma_prep_slave_sg()
236 	desc->status = DMA_IN_PROGRESS;  in hsu_dma_prep_slave_sg()
238 	return vchan_tx_prep(&hsuc->vchan, &desc->vdesc, flags);  in hsu_dma_prep_slave_sg()
247 	if (vchan_issue_pending(&hsuc->vchan) && !hsuc->desc)  in hsu_dma_issue_pending()
252 static size_t hsu_dma_desc_size(struct hsu_dma_desc *desc)  in hsu_dma_desc_size()  argument
257 	for (i = desc->active; i < desc->nents; i++)  in hsu_dma_desc_size()
258 		bytes += desc->sg[i].len;  in hsu_dma_desc_size()
265 	struct hsu_dma_desc *desc = hsuc->desc;  in hsu_dma_active_desc_size()  local
266 	size_t bytes = hsu_dma_desc_size(desc);  in hsu_dma_active_desc_size()
269 	i = desc->active % HSU_DMA_CHAN_NR_DESC;  in hsu_dma_active_desc_size()
292 	if (hsuc->desc && cookie == hsuc->desc->vdesc.tx.cookie) {  in hsu_dma_tx_status()
295 		status = hsuc->desc->status;  in hsu_dma_tx_status()
325 	if (hsuc->desc && hsuc->desc->status == DMA_IN_PROGRESS) {  in hsu_dma_pause()
327 		hsuc->desc->status = DMA_PAUSED;  in hsu_dma_pause()
340 	if (hsuc->desc && hsuc->desc->status == DMA_PAUSED) {  in hsu_dma_resume()
341 		hsuc->desc->status = DMA_IN_PROGRESS;  in hsu_dma_resume()
358 	if (hsuc->desc) {  in hsu_dma_terminate_all()
359 		hsu_dma_desc_free(&hsuc->desc->vdesc);  in hsu_dma_terminate_all()
360 		hsuc->desc = NULL;  in hsu_dma_terminate_all()