Home | History | Annotate | Download | only in linux

Lines Matching refs:sg

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