diff options
Diffstat (limited to 'nx-X11/extras/drm/bsd-core/drm_vm.c')
| -rw-r--r-- | nx-X11/extras/drm/bsd-core/drm_vm.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/nx-X11/extras/drm/bsd-core/drm_vm.c b/nx-X11/extras/drm/bsd-core/drm_vm.c new file mode 100644 index 000000000..05ac7b154 --- /dev/null +++ b/nx-X11/extras/drm/bsd-core/drm_vm.c @@ -0,0 +1,126 @@ +/*- + * 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. + */ + +#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 +{ + DRM_DEVICE; + drm_local_map_t *map; + drm_file_t *priv; + drm_map_type_t type; + + 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 DRM_ERR(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]; + +#if defined(__FreeBSD__) && __FreeBSD_version >= 500102 + *paddr = phys; + DRM_SPINUNLOCK(&dev->dma_lock); + return 0; +#else + return atop(phys); +#endif + } else { + DRM_SPINUNLOCK(&dev->dma_lock); + return -1; + } + DRM_SPINUNLOCK(&dev->dma_lock); + } + + /* 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: +#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; +} + |