drivers/dma/pxa_dma.c

516 static void set_updater_desc(struct pxad_desc_sw *sw_desc,
520 		sw_desc->hw_desc[sw_desc->nb_desc - 1];
521 	dma_addr_t dma = sw_desc->hw_desc[sw_desc->nb_desc - 2]->ddadr;
530 	if (sw_desc->cyclic)
531 		sw_desc->hw_desc[sw_desc->nb_desc - 2]->ddadr = sw_desc->first;
536 	struct pxad_desc_sw *sw_desc = to_pxad_sw_desc(vd);
538 		sw_desc->hw_desc[sw_desc->nb_desc - 1];
723 	struct pxad_desc_sw *sw_desc = to_pxad_sw_desc(vd);
725 	for (i = sw_desc->nb_desc - 1; i >= 0; i--) {
727 			dma = sw_desc->hw_desc[i - 1]->ddadr;
729 			dma = sw_desc->first;
730 		dma_pool_free(sw_desc->desc_pool,
731 			      sw_desc->hw_desc[i], dma);
733 	sw_desc->nb_desc = 0;
734 	kfree(sw_desc);
740 	struct pxad_desc_sw *sw_desc;
745 	sw_desc = kzalloc(struct_size(sw_desc, hw_desc, nb_hw_desc),
747 	if (!sw_desc)
749 	sw_desc->desc_pool = chan->desc_pool;
752 		desc = dma_pool_alloc(sw_desc->desc_pool, GFP_NOWAIT, &dma);
756 				__func__, i, sw_desc->desc_pool);
760 		sw_desc->nb_desc++;
761 		sw_desc->hw_desc[i] = desc;
764 			sw_desc->first = dma;
766 			sw_desc->hw_desc[i - 1]->ddadr = dma;
769 	return sw_desc;
771 	pxad_free_desc(&sw_desc->vd);
921 	struct pxad_desc_sw *sw_desc;
937 	sw_desc = pxad_alloc_desc(chan, nb_desc + 1);
938 	if (!sw_desc)
940 	sw_desc->len = len;
944 		sw_desc->misaligned = true;
948 		hw_desc = sw_desc->hw_desc[i++];
957 	set_updater_desc(sw_desc, flags);
959 	return pxad_tx_prep(&chan->vc, &sw_desc->vd, flags);
968 	struct pxad_desc_sw *sw_desc;
984 	sw_desc = pxad_alloc_desc(chan, nb_desc + 1);
985 	if (!sw_desc)
991 		sw_desc->len += avail;
996 				sw_desc->misaligned = true;
998 			sw_desc->hw_desc[j]->dcmd =
1000 			sw_desc->hw_desc[j]->dsadr = dsadr ? dsadr : dma;
1001 			sw_desc->hw_desc[j++]->dtadr = dtadr ? dtadr : dma;
1007 	set_updater_desc(sw_desc, flags);
1009 	return pxad_tx_prep(&chan->vc, &sw_desc->vd, flags);
1018 	struct pxad_desc_sw *sw_desc;
1044 	sw_desc = pxad_alloc_desc(chan, nb_desc + 1);
1045 	if (!sw_desc)
1047 	sw_desc->cyclic = true;
1048 	sw_desc->len = len;
1050 	phw_desc = sw_desc->hw_desc;
1060 	set_updater_desc(sw_desc, flags);
1062 	return pxad_tx_prep(&chan->vc, &sw_desc->vd, flags);
1117 	struct pxad_desc_sw *sw_desc = NULL;
1137 	sw_desc = to_pxad_sw_desc(vd);
1138 	if (sw_desc->hw_desc[0]->dcmd & PXA_DCMD_INCSRCADDR)
1153 	for (i = 0; i < sw_desc->nb_desc - 1; i++) {
1154 		hw_desc = sw_desc->hw_desc[i];
1155 		if (sw_desc->hw_desc[0]->dcmd & PXA_DCMD_INCSRCADDR)
1179 		residue = sw_desc->len;
1184 		"%s(): txd %p[%x] sw_desc=%p: %d\n",
1185 		__func__, vd, cookie, sw_desc, residue);