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-rw-r--r--bsd/drm_vm.h81
1 files changed, 81 insertions, 0 deletions
diff --git a/bsd/drm_vm.h b/bsd/drm_vm.h
new file mode 100644
index 00000000..a06fb448
--- /dev/null
+++ b/bsd/drm_vm.h
@@ -0,0 +1,81 @@
+#include <vm/vm.h>
+#include <vm/pmap.h>
+
+static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot)
+{
+ drm_device_t *dev = kdev->si_drv1;
+ drm_device_dma_t *dma = dev->dma;
+ unsigned long physical;
+ unsigned long page;
+
+ if (!dma) return -1; /* Error */
+ if (!dma->pagelist) return -1; /* Nothing allocated */
+
+ page = offset >> PAGE_SHIFT;
+ physical = dma->pagelist[page];
+
+ DRM_DEBUG("0x%08x (page %lu) => 0x%08lx\n", offset, page, physical);
+ return atop(physical);
+}
+
+int DRM(mmap)(dev_t kdev, vm_offset_t offset, int prot)
+{
+ drm_device_t *dev = kdev->si_drv1;
+ drm_map_t *map = NULL;
+ drm_map_list_entry_t *listentry=NULL;
+ /*drm_file_t *priv;*/
+
+/* DRM_DEBUG("offset = 0x%x\n", offset);*/
+
+ /*XXX Fixme */
+ /*priv = DRM(find_file_by_proc)(dev, p);
+ if (!priv) {
+ DRM_DEBUG("can't find authenticator\n");
+ return EINVAL;
+ }
+
+ if (!priv->authenticated) DRM_OS_RETURN(EACCES);*/
+
+ if (dev->dma
+ && offset >= 0
+ && offset < ptoa(dev->dma->page_count))
+ return DRM(dma_mmap)(kdev, offset, prot);
+
+ /* A sequential search of a linked list is
+ fine here because: 1) there will only be
+ about 5-10 entries in the list and, 2) a
+ DRI client only has to do this mapping
+ once, so it doesn't have to be optimized
+ for performance, even if the list was a
+ bit longer. */
+ TAILQ_FOREACH(listentry, dev->maplist, link) {
+ map = listentry->map;
+/* DRM_DEBUG("considering 0x%x..0x%x\n", map->offset, map->offset + map->size - 1);*/
+ if (offset >= map->offset
+ && offset < map->offset + map->size) break;
+ }
+
+ if (!listentry) {
+ DRM_DEBUG("can't find map\n");
+ return -1;
+ }
+ if (((map->flags&_DRM_RESTRICTED) && suser(curproc))) {
+ DRM_DEBUG("restricted map\n");
+ return -1;
+ }
+
+ switch (map->type) {
+ case _DRM_FRAME_BUFFER:
+ case _DRM_REGISTERS:
+ case _DRM_AGP:
+ return atop(offset);
+ case _DRM_SHM:
+ return atop(vtophys(offset));
+ default:
+ return -1; /* This should never happen. */
+ }
+ DRM_DEBUG("bailing out\n");
+
+ return -1;
+}
+