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author | anholt <anholt@FreeBSD.org> | 2002-04-27 20:47:57 +0000 |
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committer | anholt <anholt@FreeBSD.org> | 2002-04-27 20:47:57 +0000 |
commit | 682fe32ace5d21d6e0400fcfc7426bc6ae04c124 (patch) | |
tree | 2e73a21383876a4e751630f3059c8690aecfb78a /sys/dev/drm/drm_vm.h | |
parent | 6818945234fbb5686fb3e963d4f172c2c44fdbf1 (diff) | |
download | FreeBSD-src-682fe32ace5d21d6e0400fcfc7426bc6ae04c124.zip FreeBSD-src-682fe32ace5d21d6e0400fcfc7426bc6ae04c124.tar.gz |
Add the code for the DRM, based on the code from the drm-kmod port.
This is not hooked up yet, that will come later.
Approved by: des
Diffstat (limited to 'sys/dev/drm/drm_vm.h')
-rw-r--r-- | sys/dev/drm/drm_vm.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/sys/dev/drm/drm_vm.h b/sys/dev/drm/drm_vm.h new file mode 100644 index 0000000..1e9a7c5 --- /dev/null +++ b/sys/dev/drm/drm_vm.h @@ -0,0 +1,85 @@ +/* + * $FreeBSD$ + */ + +#include <vm/vm.h> +#include <vm/pmap.h> + +static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot) +{ + drm_device_t *dev = kdev->si_drv1; + drm_device_dma_t *dma = dev->dma; + unsigned long physical; + unsigned long page; + + if (!dma) return -1; /* Error */ + if (!dma->pagelist) return -1; /* Nothing allocated */ + + page = offset >> PAGE_SHIFT; + physical = dma->pagelist[page]; + + DRM_DEBUG("0x%08x (page %lu) => 0x%08lx\n", offset, page, physical); + return atop(physical); +} + +int DRM(mmap)(dev_t kdev, vm_offset_t offset, int prot) +{ + drm_device_t *dev = kdev->si_drv1; + drm_map_t *map = NULL; + drm_map_list_entry_t *listentry=NULL; + /*drm_file_t *priv;*/ + +/* DRM_DEBUG("offset = 0x%x\n", offset);*/ + + /*XXX Fixme */ + /*priv = DRM(find_file_by_proc)(dev, p); + if (!priv) { + DRM_DEBUG("can't find authenticator\n"); + return EINVAL; + } + + if (!priv->authenticated) DRM_OS_RETURN(EACCES);*/ + + if (dev->dma + && offset >= 0 + && offset < ptoa(dev->dma->page_count)) + return DRM(dma_mmap)(kdev, offset, prot); + + /* 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) && suser(DRM_OS_CURPROC))) { + DRM_DEBUG("restricted map\n"); + return -1; + } + + switch (map->type) { + case _DRM_FRAME_BUFFER: + case _DRM_REGISTERS: + case _DRM_AGP: + return atop(offset); + case _DRM_SHM: + return atop(vtophys(offset)); + default: + return -1; /* This should never happen. */ + } + DRM_DEBUG("bailing out\n"); + + return -1; +} + |