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/*-
* 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
* ERIC ANHOLT 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.
*/
/** @file drm_vm.c
* Support code for mmaping of DRM maps.
*/
#include "drmP.h"
#include "drm.h"
#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__) || defined(__OpenBSD__)
paddr_t drm_mmap(dev_t kdev, off_t offset, int prot)
#endif
{
struct drm_device *dev = drm_get_device_from_kdev(kdev);
drm_local_map_t *map;
drm_file_t *priv;
drm_map_type_t type;
#ifdef __FreeBSD__
vm_paddr_t phys;
#else
paddr_t phys;
#endif
DRM_LOCK();
priv = drm_find_file_by_proc(dev, DRM_CURPROC);
DRM_UNLOCK();
if (priv == NULL) {
DRM_ERROR("can't find authenticator\n");
return EINVAL;
}
if (!priv->authenticated)
return EACCES;
if (dev->dma && offset >= 0 && offset < ptoa(dev->dma->page_count)) {
drm_device_dma_t *dma = dev->dma;
DRM_SPINLOCK(&dev->dma_lock);
if (dma->pagelist != NULL) {
unsigned long page = offset >> PAGE_SHIFT;
unsigned long phys = dma->pagelist[page];
DRM_SPINUNLOCK(&dev->dma_lock);
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
*paddr = phys;
return 0;
#else
return atop(phys);
#endif
} else {
DRM_SPINUNLOCK(&dev->dma_lock);
return -1;
}
}
/* 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. */
DRM_LOCK();
TAILQ_FOREACH(map, &dev->maplist, link) {
if (offset >= map->offset && offset < map->offset + map->size)
break;
}
if (map == NULL) {
DRM_UNLOCK();
DRM_DEBUG("can't find map\n");
return -1;
}
if (((map->flags&_DRM_RESTRICTED) && !DRM_SUSER(DRM_CURPROC))) {
DRM_UNLOCK();
DRM_DEBUG("restricted map\n");
return -1;
}
type = map->type;
DRM_UNLOCK();
switch (type) {
case _DRM_FRAME_BUFFER:
case _DRM_REGISTERS:
case _DRM_AGP:
phys = offset;
break;
case _DRM_CONSISTENT:
phys = vtophys((char *)map->handle + (offset - map->offset));
break;
case _DRM_SCATTER_GATHER:
case _DRM_SHM:
phys = vtophys(offset);
break;
default:
DRM_ERROR("bad map type %d\n", type);
return -1; /* This should never happen. */
}
#if defined(__FreeBSD__) && __FreeBSD_version >= 500102
*paddr = phys;
return 0;
#else
return atop(phys);
#endif
}
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