82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
|
#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;
|
||
|
|
}
|
||
|
|
|