drivers/dma/ls2x-apb-dma.c

118  * @desc: pointer to the ls2x sw dma descriptor.
119  * @pool: hw desc table
125 	struct ls2x_dma_desc	*desc;
172 	struct ls2x_dma_desc *desc = to_ldma_desc(vdesc);
175 	for (i = 0; i < desc->desc_num; i++) {
176 		if (desc->sg[i].hw)
177 			dma_pool_free(lchan->pool, desc->sg[i].hw,
178 				      desc->sg[i].llp);
181 	kfree(desc);
204 		lchan->desc = NULL;
209 	lchan->desc = to_ldma_desc(vdesc);
210 	ldma_sg = &lchan->desc->sg[0];
240 			       struct ls2x_dma_desc *desc)
242 	struct ls2x_dma_sg *ldma_sg = &desc->sg[sg_index];
245 	if (desc->direction == DMA_MEM_TO_DEV) {
257 	num_segments = DIV_ROUND_UP((ldma_sg->len + 3) >> 2, desc->burst_size);
267 		desc->sg[sg_index - 1].hw->ndesc_addr = ldma_sg->llp | LDMA_DESC_EN;
268 		desc->sg[sg_index - 1].hw->high_ndesc_addr = upper_32_bits(ldma_sg->llp);
326 	struct ls2x_dma_desc *desc;
338 	desc = kzalloc(struct_size(desc, sg, sg_len), GFP_NOWAIT);
339 	if (!desc)
342 	desc->desc_num = sg_len;
343 	desc->direction = direction;
344 	desc->burst_size = burst_size;
347 		struct ls2x_dma_sg *ldma_sg = &desc->sg[i];
352 			desc->desc_num = i;
353 			ls2x_dma_desc_free(&desc->vdesc);
360 		ls2x_dma_fill_desc(lchan, i, desc);
364 	desc->sg[sg_len - 1].hw->ndesc_addr &= ~LDMA_DESC_EN;
365 	desc->status = DMA_IN_PROGRESS;
367 	return vchan_tx_prep(&lchan->vchan, &desc->vdesc, flags);
387 	struct ls2x_dma_desc *desc;
403 	desc = kzalloc(struct_size(desc, sg, num_periods), GFP_NOWAIT);
404 	if (!desc)
407 	desc->desc_num = num_periods;
408 	desc->direction = direction;
409 	desc->burst_size = burst_size;
413 		struct ls2x_dma_sg *ldma_sg = &desc->sg[i];
418 			desc->desc_num = i;
419 			ls2x_dma_desc_free(&desc->vdesc);
426 		ls2x_dma_fill_desc(lchan, i, desc);
430 	desc->sg[num_periods - 1].hw->ndesc_addr = desc->sg[0].llp | LDMA_DESC_EN;
431 	desc->sg[num_periods - 1].hw->high_ndesc_addr = upper_32_bits(desc->sg[0].llp);
432 	desc->cyclic = true;
433 	desc->status = DMA_IN_PROGRESS;
435 	return vchan_tx_prep(&lchan->vchan, &desc->vdesc, flags);
467 	if (vchan_issue_pending(&lchan->vchan) && !lchan->desc)
487 	if (lchan->desc) {
488 		vchan_terminate_vdesc(&lchan->desc->vdesc);
489 		lchan->desc = NULL;
517 	if (lchan->desc && lchan->desc->status == DMA_IN_PROGRESS) {
519 		lchan->desc->status = DMA_PAUSED;
532 	if (lchan->desc && lchan->desc->status == DMA_PAUSED) {
533 		lchan->desc->status = DMA_IN_PROGRESS;
551 	struct ls2x_dma_desc *desc;
554 	desc = lchan->desc;
555 	if (desc) {
556 		if (desc->cyclic) {
557 			vchan_cyclic_callback(&desc->vdesc);
559 			desc->status = DMA_COMPLETE;
560 			vchan_cookie_complete(&desc->vdesc);
564 		/* ls2x_dma_start_transfer() updates lchan->desc */
565 		if (!lchan->desc)