diff options
Diffstat (limited to 'sys/dev/drm/drm_vm.h')
| -rw-r--r-- | sys/dev/drm/drm_vm.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/sys/dev/drm/drm_vm.h b/sys/dev/drm/drm_vm.h new file mode 100644 index 000000000000..2637a83998ed --- /dev/null +++ b/sys/dev/drm/drm_vm.h @@ -0,0 +1,133 @@ +/* + * 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; +} + |