141 dma_map_sg(bus_dma_tag_t dmat, struct scatterlist *sg, int nents, int dir)  in dma_map_sg()  argument
144 	return dma_map_sg_attrs(dmat, sg, nents, dir, 0);  in dma_map_sg()
148 dma_map_sg_attrs(bus_dma_tag_t dmat, struct scatterlist *sg, int nents,  in dma_map_sg_attrs()  argument
155 	KASSERT(sg->sg_dmamap == NULL);  in dma_map_sg_attrs()
156 	KASSERT(sg->sg_npgs);  in dma_map_sg_attrs()
174 	error = bus_dmamap_create(dmat, (bus_size_t)sg->sg_npgs << PAGE_SHIFT,  in dma_map_sg_attrs()
175 	    nents, PAGE_SIZE, 0, BUS_DMA_WAITOK, &sg->sg_dmamap);  in dma_map_sg_attrs()
178 	KASSERT(sg->sg_dmamap);  in dma_map_sg_attrs()
180 	error = bus_dmamap_load_pages(dmat, sg->sg_dmamap, sg->sg_pgs,  in dma_map_sg_attrs()
181 	    (bus_size_t)sg->sg_npgs << PAGE_SHIFT, BUS_DMA_WAITOK|flags);  in dma_map_sg_attrs()
187 	KASSERT(sg->sg_dmamap->dm_nsegs > 0);  in dma_map_sg_attrs()
188 	KASSERT(sg->sg_dmamap->dm_nsegs <= nents);  in dma_map_sg_attrs()
189 	sg->sg_dmat = dmat;  in dma_map_sg_attrs()
190 	ret = sg->sg_dmamap->dm_nsegs;  in dma_map_sg_attrs()
195 			bus_dmamap_unload(dmat, sg->sg_dmamap);  in dma_map_sg_attrs()
197 		if (sg->sg_dmamap)  in dma_map_sg_attrs()
198 			bus_dmamap_destroy(dmat, sg->sg_dmamap);  in dma_map_sg_attrs()
199 		sg->sg_dmamap = NULL;  in dma_map_sg_attrs()
206 dma_unmap_sg(bus_dma_tag_t dmat, struct scatterlist *sg, int nents, int dir)  in dma_unmap_sg()  argument
209 	dma_unmap_sg_attrs(dmat, sg, nents, dir, 0);  in dma_unmap_sg()
213 dma_unmap_sg_attrs(bus_dma_tag_t dmat, struct scatterlist *sg, int nents,  in dma_unmap_sg_attrs()  argument
217 	KASSERT(sg->sg_dmat == dmat);  in dma_unmap_sg_attrs()
219 	bus_dmamap_unload(dmat, sg->sg_dmamap);  in dma_unmap_sg_attrs()
220 	bus_dmamap_destroy(dmat, sg->sg_dmamap);  in dma_unmap_sg_attrs()
221 	sg->sg_dmamap = NULL;  in dma_unmap_sg_attrs()
225 sg_dma_address(const struct scatterlist *sg)  in sg_dma_address()  argument
228 	KASSERT(sg->sg_dmamap->dm_nsegs == 1);  in sg_dma_address()
229 	return sg->sg_dmamap->dm_segs[0].ds_addr;  in sg_dma_address()
233 sg_dma_len(const struct scatterlist *sg)  in sg_dma_len()  argument
236 	KASSERT(sg->sg_dmamap->dm_nsegs == 1);  in sg_dma_len()
237 	return sg->sg_dmamap->dm_segs[0].ds_len;  in sg_dma_len()