134 lines
3.9 KiB
C
134 lines
3.9 KiB
C
/*
|
|
* Copyright 2003 Eric Anholt
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
|
|
static int DRM(dma_mmap)(struct cdev *kdev, vm_offset_t offset, vm_paddr_t *paddr,
|
|
int prot)
|
|
#elif defined(__FreeBSD__)
|
|
static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot)
|
|
#elif defined(__NetBSD__)
|
|
static paddr_t DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot)
|
|
#endif
|
|
{
|
|
DRM_DEVICE;
|
|
drm_device_dma_t *dma = dev->dma;
|
|
unsigned long physical;
|
|
unsigned long page;
|
|
|
|
if (dma == NULL || dma->pagelist == NULL)
|
|
return -1;
|
|
|
|
page = offset >> PAGE_SHIFT;
|
|
physical = dma->pagelist[page];
|
|
|
|
DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", (long)offset, page, physical);
|
|
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
|
|
*paddr = physical;
|
|
return 0;
|
|
#else
|
|
return atop(physical);
|
|
#endif
|
|
}
|
|
|
|
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
|
|
int DRM(mmap)(struct cdev *kdev, vm_offset_t offset, vm_paddr_t *paddr,
|
|
int prot)
|
|
#elif defined(__FreeBSD__)
|
|
int DRM(mmap)(dev_t kdev, vm_offset_t offset, int prot)
|
|
#elif defined(__NetBSD__)
|
|
paddr_t DRM(mmap)(dev_t kdev, off_t offset, int prot)
|
|
#endif
|
|
{
|
|
DRM_DEVICE;
|
|
drm_local_map_t *map = NULL;
|
|
drm_map_list_entry_t *listentry = NULL;
|
|
drm_file_t *priv;
|
|
|
|
DRM_GET_PRIV_WITH_RETURN(priv, (DRMFILE)(uintptr_t)DRM_CURRENTPID);
|
|
|
|
if (!priv->authenticated)
|
|
return DRM_ERR(EACCES);
|
|
|
|
if (dev->dma
|
|
&& offset >= 0
|
|
&& offset < ptoa(dev->dma->page_count))
|
|
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
|
|
return DRM(dma_mmap)(kdev, offset, paddr, prot);
|
|
#else
|
|
return DRM(dma_mmap)(kdev, offset, prot);
|
|
#endif
|
|
|
|
/* 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) && DRM_SUSER(DRM_CURPROC))) {
|
|
DRM_DEBUG("restricted map\n");
|
|
return -1;
|
|
}
|
|
|
|
switch (map->type) {
|
|
case _DRM_FRAME_BUFFER:
|
|
case _DRM_REGISTERS:
|
|
case _DRM_AGP:
|
|
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
|
|
*paddr = offset;
|
|
return 0;
|
|
#else
|
|
return atop(offset);
|
|
#endif
|
|
case _DRM_SCATTER_GATHER:
|
|
case _DRM_SHM:
|
|
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
|
|
*paddr = vtophys(offset);
|
|
return 0;
|
|
#else
|
|
return atop(vtophys(offset));
|
|
#endif
|
|
default:
|
|
return -1; /* This should never happen. */
|
|
}
|
|
DRM_DEBUG("bailing out\n");
|
|
|
|
return -1;
|
|
}
|
|
|