81 	struct drm_modeset_acquire_ctx *ctx;  in drm_modeset_lock_all()  local
84 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL | __GFP_NOFAIL);  in drm_modeset_lock_all()
85 	if (WARN_ON(!ctx))  in drm_modeset_lock_all()
90 	drm_modeset_acquire_init(ctx, 0);  in drm_modeset_lock_all()
93 	ret = drm_modeset_lock_all_ctx(dev, ctx);  in drm_modeset_lock_all()
96 			drm_modeset_backoff(ctx);  in drm_modeset_lock_all()
100 		drm_modeset_acquire_fini(ctx);  in drm_modeset_lock_all()
101 		kfree(ctx);  in drm_modeset_lock_all()
111 	config->acquire_ctx = ctx;  in drm_modeset_lock_all()
134 	struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx;  in drm_modeset_unlock_all()  local
136 	if (WARN_ON(!ctx))  in drm_modeset_unlock_all()
140 	drm_modeset_drop_locks(ctx);  in drm_modeset_unlock_all()
141 	drm_modeset_acquire_fini(ctx);  in drm_modeset_unlock_all()
143 	kfree(ctx);  in drm_modeset_unlock_all()
165 	struct drm_modeset_acquire_ctx *ctx;  in drm_modeset_lock_crtc()  local
168 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);  in drm_modeset_lock_crtc()
169 	if (WARN_ON(!ctx))  in drm_modeset_lock_crtc()
172 	drm_modeset_acquire_init(ctx, 0);  in drm_modeset_lock_crtc()
175 	ret = drm_modeset_lock(&crtc->mutex, ctx);  in drm_modeset_lock_crtc()
180 		ret = drm_modeset_lock(&plane->mutex, ctx);  in drm_modeset_lock_crtc()
185 			ret = drm_modeset_lock(&plane->crtc->mutex, ctx);  in drm_modeset_lock_crtc()
196 	crtc->acquire_ctx = ctx;  in drm_modeset_lock_crtc()
202 		drm_modeset_backoff(ctx);  in drm_modeset_lock_crtc()
238 	struct drm_modeset_acquire_ctx *ctx = crtc->acquire_ctx;  in drm_modeset_unlock_crtc()  local
240 	if (WARN_ON(!ctx))  in drm_modeset_unlock_crtc()
244 	drm_modeset_drop_locks(ctx);  in drm_modeset_unlock_crtc()
245 	drm_modeset_acquire_fini(ctx);  in drm_modeset_unlock_crtc()
247 	kfree(ctx);  in drm_modeset_unlock_crtc()
278 void drm_modeset_acquire_init(struct drm_modeset_acquire_ctx *ctx,  in drm_modeset_acquire_init()  argument
281 	memset(ctx, 0, sizeof(*ctx));  in drm_modeset_acquire_init()
282 	ww_acquire_init(&ctx->ww_ctx, &crtc_ww_class);  in drm_modeset_acquire_init()
283 	INIT_LIST_HEAD(&ctx->locked);  in drm_modeset_acquire_init()
291 void drm_modeset_acquire_fini(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_acquire_fini()  argument
293 	ww_acquire_fini(&ctx->ww_ctx);  in drm_modeset_acquire_fini()
303 void drm_modeset_drop_locks(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_drop_locks()  argument
305 	WARN_ON(ctx->contended);  in drm_modeset_drop_locks()
306 	while (!list_empty(&ctx->locked)) {  in drm_modeset_drop_locks()
309 		lock = list_first_entry(&ctx->locked,  in drm_modeset_drop_locks()
318 		struct drm_modeset_acquire_ctx *ctx,  in modeset_lock()  argument
323 	WARN_ON(ctx->contended);  in modeset_lock()
325 	if (ctx->trylock_only) {  in modeset_lock()
326 		lockdep_assert_held(&ctx->ww_ctx);  in modeset_lock()
333 		ret = ww_mutex_lock_slow_interruptible(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
335 		ret = ww_mutex_lock_interruptible(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
337 		ww_mutex_lock_slow(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
340 		ret = ww_mutex_lock(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
344 		list_add(&lock->head, &ctx->locked);  in modeset_lock()
353 		ctx->contended = lock;  in modeset_lock()
359 static int modeset_backoff(struct drm_modeset_acquire_ctx *ctx,  in modeset_backoff()  argument
362 	struct drm_modeset_lock *contended = ctx->contended;  in modeset_backoff()
364 	ctx->contended = NULL;  in modeset_backoff()
369 	drm_modeset_drop_locks(ctx);  in modeset_backoff()
371 	return modeset_lock(contended, ctx, interruptible, true);  in modeset_backoff()
382 void drm_modeset_backoff(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_backoff()  argument
384 	modeset_backoff(ctx, false);  in drm_modeset_backoff()
394 int drm_modeset_backoff_interruptible(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_backoff_interruptible()  argument
396 	return modeset_backoff(ctx, true);  in drm_modeset_backoff_interruptible()
412 		struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_lock()  argument
414 	if (ctx)  in drm_modeset_lock()
415 		return modeset_lock(lock, ctx, false, false);  in drm_modeset_lock()
430 		struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_lock_interruptible()  argument
432 	if (ctx)  in drm_modeset_lock_interruptible()
433 		return modeset_lock(lock, ctx, true, false);  in drm_modeset_lock_interruptible()
469 			     struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_lock_all_ctx()  argument
475 	ret = drm_modeset_lock(&dev->mode_config.connection_mutex, ctx);  in drm_modeset_lock_all_ctx()
480 		ret = drm_modeset_lock(&crtc->mutex, ctx);  in drm_modeset_lock_all_ctx()
486 		ret = drm_modeset_lock(&plane->mutex, ctx);  in drm_modeset_lock_all_ctx()