71     if (ch->dma.alloc == NULL)  in ata_dmainit()
72 	ch->dma.alloc = ata_dmaalloc;  in ata_dmainit()
73     if (ch->dma.free == NULL)  in ata_dmainit()
74 	ch->dma.free = ata_dmafree;  in ata_dmainit()
75     if (ch->dma.setprd == NULL)  in ata_dmainit()
76 	ch->dma.setprd = ata_dmasetprd;  in ata_dmainit()
77     if (ch->dma.load == NULL)  in ata_dmainit()
78 	ch->dma.load = ata_dmaload;  in ata_dmainit()
79     if (ch->dma.unload == NULL)  in ata_dmainit()
80 	ch->dma.unload = ata_dmaunload;  in ata_dmainit()
81     if (ch->dma.alignment == 0)  in ata_dmainit()
82 	ch->dma.alignment = 2;  in ata_dmainit()
83     if (ch->dma.boundary == 0)  in ata_dmainit()
84 	ch->dma.boundary = 65536;  in ata_dmainit()
85     if (ch->dma.segsize == 0)  in ata_dmainit()
86 	ch->dma.segsize = 65536;  in ata_dmainit()
87     if (ch->dma.max_iosize == 0)  in ata_dmainit()
88 	ch->dma.max_iosize = (ATA_DMA_ENTRIES - 1) * PAGE_SIZE;  in ata_dmainit()
89     if (ch->dma.max_address == 0)  in ata_dmainit()
90 	ch->dma.max_address = BUS_SPACE_MAXADDR_32BIT;  in ata_dmainit()
91     if (ch->dma.dma_slots == 0)  in ata_dmainit()
92 	ch->dma.dma_slots = 1;  in ata_dmainit()
94     if (bus_dma_tag_create(bus_get_dma_tag(dev), ch->dma.alignment, 0,  in ata_dmainit()
95 			   ch->dma.max_address, BUS_SPACE_MAXADDR,  in ata_dmainit()
96 			   NULL, NULL, ch->dma.max_iosize,  in ata_dmainit()
97 			   ATA_DMA_ENTRIES, ch->dma.segsize,  in ata_dmainit()
98 			   0, NULL, NULL, &ch->dma.dmatag))  in ata_dmainit()
101     if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, 64 * 1024,  in ata_dmainit()
102 			   ch->dma.max_address, BUS_SPACE_MAXADDR,  in ata_dmainit()
104 			   0, NULL, NULL, &ch->dma.work_tag))  in ata_dmainit()
107     if (bus_dmamem_alloc(ch->dma.work_tag, (void **)&ch->dma.work,  in ata_dmainit()
109 			 &ch->dma.work_map))  in ata_dmainit()
112     if (bus_dmamap_load(ch->dma.work_tag, ch->dma.work_map, ch->dma.work,  in ata_dmainit()
115 	bus_dmamem_free(ch->dma.work_tag, ch->dma.work, ch->dma.work_map);  in ata_dmainit()
118     ch->dma.work_bus = dcba.maddr;  in ata_dmainit()
131     if (ch->dma.work_bus) {  in ata_dmafini()
132 	bus_dmamap_unload(ch->dma.work_tag, ch->dma.work_map);  in ata_dmafini()
133 	bus_dmamem_free(ch->dma.work_tag, ch->dma.work, ch->dma.work_map);  in ata_dmafini()
134 	ch->dma.work_bus = 0;  in ata_dmafini()
135 	ch->dma.work = NULL;  in ata_dmafini()
137     if (ch->dma.work_tag) {  in ata_dmafini()
138 	bus_dma_tag_destroy(ch->dma.work_tag);  in ata_dmafini()
139 	ch->dma.work_tag = NULL;  in ata_dmafini()
141     if (ch->dma.dmatag) {  in ata_dmafini()
142 	bus_dma_tag_destroy(ch->dma.dmatag);  in ata_dmafini()
143 	ch->dma.dmatag = NULL;  in ata_dmafini()
164     bzero(ch->dma.slot, sizeof(struct ata_dmaslot) * ATA_DMA_SLOTS);  in ata_dmaalloc()
165     for (i = 0; i < ch->dma.dma_slots; i++) {  in ata_dmaalloc()
166 	struct ata_dmaslot *slot = &ch->dma.slot[i];  in ata_dmaalloc()
168 	if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, PAGE_SIZE,  in ata_dmaalloc()
169 			       ch->dma.max_address, BUS_SPACE_MAXADDR,  in ata_dmaalloc()
189 	if (bus_dma_tag_create(ch->dma.dmatag,  in ata_dmaalloc()
190 			       ch->dma.alignment, ch->dma.boundary,  in ata_dmaalloc()
191                                ch->dma.max_address, BUS_SPACE_MAXADDR,  in ata_dmaalloc()
192                                NULL, NULL, ch->dma.max_iosize,  in ata_dmaalloc()
193                                ATA_DMA_ENTRIES, ch->dma.segsize,  in ata_dmaalloc()
220 	struct ata_dmaslot *slot = &ch->dma.slot[i];  in ata_dmafree()
273     if (request->dma) {  in ata_dmaload()
283     if (request->bytecount & (ch->dma.alignment - 1)) {  in ata_dmaload()
286 		      request->bytecount, ch->dma.alignment);  in ata_dmaload()
289     if (request->bytecount > ch->dma.max_iosize) {  in ata_dmaload()
292 		      request->bytecount, ch->dma.max_iosize);  in ata_dmaload()
297     request->dma = &ch->dma.slot[0];  in ata_dmaload()
302 	dspa.dmatab = request->dma->sg;  in ata_dmaload()
305         error = bus_dmamap_load_ccb(request->dma->data_tag,  in ata_dmaload()
306 				request->dma->data_map, request->ccb,  in ata_dmaload()
307 				ch->dma.setprd, &dspa, BUS_DMA_NOWAIT);  in ata_dmaload()
309         error = bus_dmamap_load(request->dma->data_tag, request->dma->data_map,  in ata_dmaload()
311 				ch->dma.setprd, &dspa, BUS_DMA_NOWAIT);  in ata_dmaload()
320     bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map,  in ata_dmaload()
322     bus_dmamap_sync(request->dma->data_tag, request->dma->data_map,  in ata_dmaload()
337     if (request->dma) {  in ata_dmaunload()
338 	bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map,  in ata_dmaunload()
340 	bus_dmamap_sync(request->dma->data_tag, request->dma->data_map,  in ata_dmaunload()
344 	bus_dmamap_unload(request->dma->data_tag, request->dma->data_map);  in ata_dmaunload()
345         request->dma = NULL;  in ata_dmaunload()