| /*- |
| * 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_t *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]; |
| |
| #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: |
| 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 |
| } |
| |