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authorDavid Herrmann <dh.herrmann@gmail.com>2014-07-23 11:01:12 +0400
committerDavid Herrmann <dh.herrmann@gmail.com>2014-08-05 18:07:45 +0400
commit9f8d21ea276177547725a60cefc1b6da742f14d3 (patch)
tree1511b996ef09915f43246b7ecf145b2bd2ac349b /drivers/gpu/drm/drm_context.c
parenta91576d7916f6cce76d30303e60e1ac47cf4a76d (diff)
downloadlinux-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>
Diffstat (limited to 'drivers/gpu/drm/drm_context.c')
-rw-r--r--drivers/gpu/drm/drm_context.c30
1 files changed, 30 insertions, 0 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);
+}
+
/*@}*/
/******************************************************************/