| 1 | /* |
| 2 | * $FreeBSD: src/sys/dev/drm/drm_vm.h,v 1.6.2.1 2003/04/26 07:05:29 anholt Exp $ |
| 3 | */ |
| 4 | |
| 5 | #if defined(__FreeBSD__) && __FreeBSD_version >= 500102 |
| 6 | static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, vm_paddr_t *paddr, |
| 7 | int prot) |
| 8 | #elif defined(__FreeBSD__) |
| 9 | static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot) |
| 10 | #elif defined(__NetBSD__) |
| 11 | static paddr_t DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot) |
| 12 | #endif |
| 13 | { |
| 14 | DRM_DEVICE; |
| 15 | drm_device_dma_t *dma = dev->dma; |
| 16 | unsigned long physical; |
| 17 | unsigned long page; |
| 18 | |
| 19 | if (!dma) return -1; /* Error */ |
| 20 | if (!dma->pagelist) return -1; /* Nothing allocated */ |
| 21 | |
| 22 | page = offset >> PAGE_SHIFT; |
| 23 | physical = dma->pagelist[page]; |
| 24 | |
| 25 | DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", (long)offset, page, physical); |
| 26 | #if defined(__FreeBSD__) && __FreeBSD_version >= 500102 |
| 27 | *paddr = physical; |
| 28 | return 0; |
| 29 | #else |
| 30 | return atop(physical); |
| 31 | #endif |
| 32 | } |
| 33 | |
| 34 | #if defined(__FreeBSD__) && __FreeBSD_version >= 500102 |
| 35 | int DRM(mmap)(dev_t kdev, vm_offset_t offset, vm_paddr_t *paddr, |
| 36 | int prot) |
| 37 | #elif defined(__FreeBSD__) |
| 38 | int DRM(mmap)(dev_t kdev, vm_offset_t offset, int prot) |
| 39 | #elif defined(__NetBSD__) |
| 40 | paddr_t DRM(mmap)(dev_t kdev, off_t offset, int prot) |
| 41 | #endif |
| 42 | { |
| 43 | DRM_DEVICE; |
| 44 | drm_local_map_t *map = NULL; |
| 45 | drm_map_list_entry_t *listentry=NULL; |
| 46 | drm_file_t *priv; |
| 47 | |
| 48 | priv = DRM(find_file_by_proc)(dev, DRM_CURPROC); |
| 49 | if (!priv) { |
| 50 | DRM_DEBUG("can't find authenticator\n"); |
| 51 | return EINVAL; |
| 52 | } |
| 53 | |
| 54 | if (!priv->authenticated) |
| 55 | return DRM_ERR(EACCES); |
| 56 | |
| 57 | if (dev->dma |
| 58 | && offset >= 0 |
| 59 | && offset < ptoa(dev->dma->page_count)) |
| 60 | #if defined(__FreeBSD__) && __FreeBSD_version >= 500102 |
| 61 | return DRM(dma_mmap)(kdev, offset, paddr, prot); |
| 62 | #else |
| 63 | return DRM(dma_mmap)(kdev, offset, prot); |
| 64 | #endif |
| 65 | |
| 66 | /* A sequential search of a linked list is |
| 67 | fine here because: 1) there will only be |
| 68 | about 5-10 entries in the list and, 2) a |
| 69 | DRI client only has to do this mapping |
| 70 | once, so it doesn't have to be optimized |
| 71 | for performance, even if the list was a |
| 72 | bit longer. */ |
| 73 | TAILQ_FOREACH(listentry, dev->maplist, link) { |
| 74 | map = listentry->map; |
| 75 | /* DRM_DEBUG("considering 0x%x..0x%x\n", map->offset, map->offset + map->size - 1);*/ |
| 76 | if (offset >= map->offset |
| 77 | && offset < map->offset + map->size) break; |
| 78 | } |
| 79 | |
| 80 | if (!listentry) { |
| 81 | DRM_DEBUG("can't find map\n"); |
| 82 | return -1; |
| 83 | } |
| 84 | if (((map->flags&_DRM_RESTRICTED) && DRM_SUSER(DRM_CURPROC))) { |
| 85 | DRM_DEBUG("restricted map\n"); |
| 86 | return -1; |
| 87 | } |
| 88 | |
| 89 | switch (map->type) { |
| 90 | case _DRM_FRAME_BUFFER: |
| 91 | case _DRM_REGISTERS: |
| 92 | case _DRM_AGP: |
| 93 | #if defined(__FreeBSD__) && __FreeBSD_version >= 500102 |
| 94 | *paddr = offset; |
| 95 | return 0; |
| 96 | #else |
| 97 | return atop(offset); |
| 98 | #endif |
| 99 | case _DRM_SCATTER_GATHER: |
| 100 | case _DRM_SHM: |
| 101 | #if defined(__FreeBSD__) && __FreeBSD_version >= 500102 |
| 102 | *paddr = vtophys(offset); |
| 103 | return 0; |
| 104 | #else |
| 105 | return atop(vtophys(offset)); |
| 106 | #endif |
| 107 | default: |
| 108 | return -1; /* This should never happen. */ |
| 109 | } |
| 110 | DRM_DEBUG("bailing out\n"); |
| 111 | |
| 112 | return -1; |
| 113 | } |
| 114 | |