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#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;
}
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