diff options
author | Alan Cox <alan@linux.intel.com> | 2011-07-05 15:37:16 +0100 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-07-05 08:20:39 -0700 |
commit | eee9b52e5e9024abd7fc9e5a71230218cbc9db93 (patch) | |
tree | 96d95c95704cb2fdc5d6ec06d9ae0ef4e77874bc /drivers/staging/gma500/gem_glue.c | |
parent | a897854c30903bc77d919fc303009d17c1548b08 (diff) | |
download | op-kernel-dev-eee9b52e5e9024abd7fc9e5a71230218cbc9db93.zip op-kernel-dev-eee9b52e5e9024abd7fc9e5a71230218cbc9db93.tar.gz |
gma500: Move our other GEM helper into the bits want to push into GEM
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/gma500/gem_glue.c')
-rw-r--r-- | drivers/staging/gma500/gem_glue.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/staging/gma500/gem_glue.c b/drivers/staging/gma500/gem_glue.c index 0817497..0e7364b 100644 --- a/drivers/staging/gma500/gem_glue.c +++ b/drivers/staging/gma500/gem_glue.c @@ -45,3 +45,57 @@ void drm_gem_object_release_wrap(struct drm_gem_object *obj) if (obj->filp) drm_gem_object_release(obj); } + +/** + * gem_create_mmap_offset - invent an mmap offset + * @obj: our object + * + * Standard implementation of offset generation for mmap as is + * duplicated in several drivers. This belongs in GEM. + */ +int gem_create_mmap_offset(struct drm_gem_object *obj) +{ + struct drm_device *dev = obj->dev; + struct drm_gem_mm *mm = dev->mm_private; + struct drm_map_list *list; + struct drm_local_map *map; + int ret; + + list = &obj->map_list; + list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); + if (list->map == NULL) + return -ENOMEM; + map = list->map; + map->type = _DRM_GEM; + map->size = obj->size; + map->handle = obj; + + list->file_offset_node = drm_mm_search_free(&mm->offset_manager, + obj->size / PAGE_SIZE, 0, 0); + if (!list->file_offset_node) { + dev_err(dev->dev, "failed to allocate offset for bo %d\n", + obj->name); + ret = -ENOSPC; + goto free_it; + } + list->file_offset_node = drm_mm_get_block(list->file_offset_node, + obj->size / PAGE_SIZE, 0); + if (!list->file_offset_node) { + ret = -ENOMEM; + goto free_it; + } + list->hash.key = list->file_offset_node->start; + ret = drm_ht_insert_item(&mm->offset_hash, &list->hash); + if (ret) { + dev_err(dev->dev, "failed to add to map hash\n"); + goto free_mm; + } + return 0; + +free_mm: + drm_mm_put_block(list->file_offset_node); +free_it: + kfree(list->map); + list->map = NULL; + return ret; +} |