dist/bsd-core/drm_pci.c

41 	drm_dma_handle_t *dmah = arg;
47 	dmah->busaddr = segs[0].ds_addr;
59 	drm_dma_handle_t *dmah;
72 	dmah = malloc(sizeof(drm_dma_handle_t), DRM_MEM_DMA, M_ZERO | M_NOWAIT);
73 	if (dmah == NULL)
90 	    &dmah->tag);
92 		free(dmah, DRM_MEM_DMA);
96 	ret = bus_dmamem_alloc(dmah->tag, &dmah->vaddr,
97 	    BUS_DMA_WAITOK | BUS_DMA_ZERO, &dmah->map);
99 		bus_dma_tag_destroy(dmah->tag);
100 		free(dmah, DRM_MEM_DMA);
104 	ret = bus_dmamap_load(dmah->tag, dmah->map, dmah->vaddr, size,
105 	    drm_pci_busdma_callback, dmah, BUS_DMA_NOWAIT | BUS_DMA_NOCACHE);
107 		bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map);
108 		bus_dma_tag_destroy(dmah->tag);
109 		free(dmah, DRM_MEM_DMA);
114 	dmah->tag = dev->pa.pa_dmat; /* use 32-bit DMA tag */
116 	if ((ret = bus_dmamem_alloc(dmah->tag, size, align, 0,
117 	    dmah->segs, 1, &nsegs, BUS_DMA_WAITOK)) != 0) {
120 		dmah->tag = NULL;
121 		free(dmah, DRM_MEM_DMA);
127 		bus_dmamem_free(dmah->tag, dmah->segs, 1);
128 		dmah->tag = NULL;
129 		free(dmah, DRM_MEM_DMA);
132 	if ((ret = bus_dmamem_map(dmah->tag, dmah->segs, nsegs, size,
133 	     &dmah->vaddr, BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_NOCACHE)) != 0) {
135 		bus_dmamem_free(dmah->tag, dmah->segs, 1);
136 		dmah->tag = NULL;
137 		free(dmah, DRM_MEM_DMA);
140 	if ((ret = bus_dmamap_create(dmah->tag, size, 1, size, 0,
141 	     BUS_DMA_NOWAIT, &dmah->map)) != 0) {
143 		bus_dmamem_unmap(dmah->tag, dmah->vaddr, size);
144 		bus_dmamem_free(dmah->tag, dmah->segs, 1);
145 		dmah->tag = NULL;
146 		free(dmah, DRM_MEM_DMA);
149 	if ((ret = bus_dmamap_load(dmah->tag, dmah->map, dmah->vaddr,
152 		bus_dmamap_destroy(dmah->tag, dmah->map);
153 		bus_dmamem_unmap(dmah->tag, dmah->vaddr, size);
154 		bus_dmamem_free(dmah->tag, dmah->segs, 1);
155 		dmah->tag = NULL;
156 		free(dmah, DRM_MEM_DMA);
159 	dmah->busaddr = dmah->map->dm_segs[0].ds_addr;
160 	dmah->size = size;
161 	dmah->nsegs = 1;
162 	memset(dmah->vaddr, 0, size);
165 	return dmah;
172 drm_pci_free(struct drm_device *dev, drm_dma_handle_t *dmah)
174 	if (dmah == NULL)
178 	bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map);
179 	bus_dma_tag_destroy(dmah->tag);
181 	bus_dmamap_unload(dmah->tag, dmah->map);
182 	bus_dmamap_destroy(dmah->tag, dmah->map);
183 	bus_dmamem_unmap(dmah->tag, dmah->vaddr, dmah->size);
184 	bus_dmamem_free(dmah->tag, dmah->segs, 1);
185 	dmah->tag = NULL;
188 	free(dmah, DRM_MEM_DMA);