dma/ptdma/ptdma-dmaengine.c

42 	struct pt_dma_desc *desc = to_pt_desc(vd);
43 	struct pt_device *pt = desc->pt;
45 	kmem_cache_free(pt->dma_desc_cache, desc);
48 static int pt_dma_start_desc(struct pt_dma_desc *desc)
55 	desc->issued_to_hw = 1;
57 	pt_cmd = &desc->pt_cmd;
79 						 struct pt_dma_desc *desc)
87 		if (desc) {
88 			if (!desc->issued_to_hw) {
90 				if (desc->status != DMA_ERROR)
91 					return desc;
94 			tx_desc = &desc->vd.tx;
95 			vd = &desc->vd;
102 		if (desc) {
103 			if (desc->status != DMA_COMPLETE) {
104 				if (desc->status != DMA_ERROR)
105 					desc->status = DMA_COMPLETE;
109 				list_del(&desc->vd.node);
116 		desc = pt_next_dma_desc(chan);
125 	} while (desc);
132 	struct pt_dma_desc *desc = data;
140 	dma_chan = desc->vd.tx.chan;
144 		desc->status = DMA_ERROR;
148 		desc = pt_handle_active_desc(chan, desc);
151 		if (!desc)
154 		ret = pt_dma_start_desc(desc);
158 		desc->status = DMA_ERROR;
165 	struct pt_dma_desc *desc;
167 	desc = kmem_cache_zalloc(chan->pt->dma_desc_cache, GFP_NOWAIT);
168 	if (!desc)
171 	vchan_tx_prep(&chan->vc, &desc->vd, flags);
173 	desc->pt = chan->pt;
174 	desc->pt->cmd_q.int_en = !!(flags & DMA_PREP_INTERRUPT);
175 	desc->issued_to_hw = 0;
176 	desc->status = DMA_IN_PROGRESS;
178 	return desc;
189 	struct pt_dma_desc *desc;
192 	desc = pt_alloc_dma_desc(chan, flags);
193 	if (!desc)
196 	pt_cmd = &desc->pt_cmd;
204 	pt_cmd->data = desc;
206 	desc->len = len;
208 	return desc;
215 	struct pt_dma_desc *desc;
217 	desc = pt_create_desc(dma_chan, dst, src, len, flags);
218 	if (!desc)
221 	return &desc->vd.tx;
228 	struct pt_dma_desc *desc;
230 	desc = pt_alloc_dma_desc(chan, flags);
231 	if (!desc)
234 	return &desc->vd.tx;
240 	struct pt_dma_desc *desc;
246 	desc = pt_next_dma_desc(chan);
247 	if (desc)
252 	desc = pt_next_dma_desc(chan);
257 	if (engine_is_idle && desc)
258 		pt_cmd_callback(desc, 0);
287 	struct pt_dma_desc *desc = NULL;
292 	desc = pt_next_dma_desc(chan);
296 	if (desc)
297 		pt_cmd_callback(desc, 0);
340 					 "%s-dmaengine-desc-cache",