diff options
| author | David Herrmann <dh.herrmann@gmail.com> | 2014-07-23 11:01:12 +0400 |
|---|---|---|
| committer | David Herrmann <dh.herrmann@gmail.com> | 2014-08-05 18:07:45 +0400 |
| commit | 9f8d21ea276177547725a60cefc1b6da742f14d3 (patch) | |
| tree | 1511b996ef09915f43246b7ecf145b2bd2ac349b | |
| parent | a91576d7916f6cce76d30303e60e1ac47cf4a76d (diff) | |
| download | linux-9f8d21ea276177547725a60cefc1b6da742f14d3.tar.xz | |
drm: extract legacy ctxbitmap flushing
The ctxbitmap code is only used by legacy drivers so lets try to keep it
as separated as possible. Furthermore, the locking is non-obvious and
kinda weird with ctxlist_mutex *and* struct_mutex. Keeping all ctxbitmap
access in one file is much easier to review and makes drm_release() more
readable.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
| -rw-r--r-- | drivers/gpu/drm/drm_context.c | 30 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_fops.c | 20 | ||||
| -rw-r--r-- | include/drm/drmP.h | 1 |
3 files changed, 32 insertions, 19 deletions
diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c index a4b017b6849e..c045505978f1 100644 --- a/drivers/gpu/drm/drm_context.c +++ b/drivers/gpu/drm/drm_context.c @@ -111,6 +111,36 @@ void drm_ctxbitmap_cleanup(struct drm_device * dev) mutex_unlock(&dev->struct_mutex); } +/** + * drm_ctxbitmap_flush() - Flush all contexts owned by a file + * @dev: DRM device to operate on + * @file: Open file to flush contexts for + * + * This iterates over all contexts on @dev and drops them if they're owned by + * @file. Note that after this call returns, new contexts might be added if + * the file is still alive. + */ +void drm_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file) +{ + struct drm_ctx_list *pos, *tmp; + + mutex_lock(&dev->ctxlist_mutex); + + list_for_each_entry_safe(pos, tmp, &dev->ctxlist, head) { + if (pos->tag == file && + pos->handle != DRM_KERNEL_CONTEXT) { + if (dev->driver->context_dtor) + dev->driver->context_dtor(dev, pos->handle); + + drm_ctxbitmap_free(dev, pos->handle); + list_del(&pos->head); + kfree(pos); + } + } + + mutex_unlock(&dev->ctxlist_mutex); +} + /*@}*/ /******************************************************************/ diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index bc583fe51e45..55143f7747f3 100644 --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -457,25 +457,7 @@ int drm_release(struct inode *inode, struct file *filp) if (dev->driver->driver_features & DRIVER_GEM) drm_gem_release(dev, file_priv); - mutex_lock(&dev->ctxlist_mutex); - if (!list_empty(&dev->ctxlist)) { - struct drm_ctx_list *pos, *n; - - list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { - if (pos->tag == file_priv && - pos->handle != DRM_KERNEL_CONTEXT) { - if (dev->driver->context_dtor) - dev->driver->context_dtor(dev, - pos->handle); - - drm_ctxbitmap_free(dev, pos->handle); - - list_del(&pos->head); - kfree(pos); - } - } - } - mutex_unlock(&dev->ctxlist_mutex); + drm_ctxbitmap_flush(dev, file_priv); mutex_lock(&dev->master_mutex); diff --git a/include/drm/drmP.h b/include/drm/drmP.h index d3d9be6b83ef..80889982d196 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -1242,6 +1242,7 @@ extern int drm_rmctx(struct drm_device *dev, void *data, extern int drm_ctxbitmap_init(struct drm_device *dev); extern void drm_ctxbitmap_cleanup(struct drm_device *dev); extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle); +extern void drm_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file); extern int drm_setsareactx(struct drm_device *dev, void *data, struct drm_file *file_priv); |