114 hyperv_dma_alloc(bus_dma_tag_t dmat, struct hyperv_dma *dma, bus_size_t size,  in hyperv_dma_alloc()  argument
119 	KASSERT(dma != NULL);  in hyperv_dma_alloc()
120 	KASSERT(dma->segs == NULL);  in hyperv_dma_alloc()
123 	dma->segs = kmem_zalloc(sizeof(*dma->segs) * nsegs, KM_SLEEP);  in hyperv_dma_alloc()
124 	dma->nsegs = nsegs;  in hyperv_dma_alloc()
126 	error = bus_dmamem_alloc(dmat, size, alignment, boundary, dma->segs,  in hyperv_dma_alloc()
133 	error = bus_dmamem_map(dmat, dma->segs, rseg, size, &dma->addr,  in hyperv_dma_alloc()
141 	    BUS_DMA_WAITOK, &dma->map);  in hyperv_dma_alloc()
147 	error = bus_dmamap_load(dmat, dma->map, dma->addr, size, NULL,  in hyperv_dma_alloc()
155 	memset(dma->addr, 0, dma->map->dm_mapsize);  in hyperv_dma_alloc()
156 	bus_dmamap_sync(dmat, dma->map, 0, dma->map->dm_mapsize,  in hyperv_dma_alloc()
159 	return dma->addr;  in hyperv_dma_alloc()
161 fail4:	bus_dmamap_destroy(dmat, dma->map);  in hyperv_dma_alloc()
162 fail3:	bus_dmamem_unmap(dmat, dma->addr, size);  in hyperv_dma_alloc()
163 	dma->addr = NULL;  in hyperv_dma_alloc()
164 fail2:	bus_dmamem_free(dmat, dma->segs, rseg);  in hyperv_dma_alloc()
165 fail1:	kmem_free(dma->segs, sizeof(*dma->segs) * nsegs);  in hyperv_dma_alloc()
166 	dma->segs = NULL;  in hyperv_dma_alloc()
167 	dma->nsegs = 0;  in hyperv_dma_alloc()
172 hyperv_dma_free(bus_dma_tag_t dmat, struct hyperv_dma *dma)  in hyperv_dma_free()  argument
174 	bus_size_t size = dma->map->dm_mapsize;  in hyperv_dma_free()
175 	int rsegs = dma->map->dm_nsegs;  in hyperv_dma_free()
177 	bus_dmamap_unload(dmat, dma->map);  in hyperv_dma_free()
178 	bus_dmamap_destroy(dmat, dma->map);  in hyperv_dma_free()
179 	bus_dmamem_unmap(dmat, dma->addr, size);  in hyperv_dma_free()
180 	dma->addr = NULL;  in hyperv_dma_free()
181 	bus_dmamem_free(dmat, dma->segs, rsegs);  in hyperv_dma_free()
182 	kmem_free(dma->segs, sizeof(*dma->segs) * dma->nsegs);  in hyperv_dma_free()
183 	dma->segs = NULL;  in hyperv_dma_free()
184 	dma->nsegs = 0;  in hyperv_dma_free()