74 	struct drm_modeset_acquire_ctx *ctx;  in __drm_modeset_lock_all()  local
77 	ctx = kzalloc(sizeof(*ctx),  in __drm_modeset_lock_all()
79 	if (!ctx)  in __drm_modeset_lock_all()
89 	drm_modeset_acquire_init(ctx, 0);  in __drm_modeset_lock_all()
90 	ctx->trylock_only = trylock;  in __drm_modeset_lock_all()
93 	ret = drm_modeset_lock(&config->connection_mutex, ctx);  in __drm_modeset_lock_all()
96 	ret = drm_modeset_lock_all_crtcs(dev, ctx);  in __drm_modeset_lock_all()
105 	config->acquire_ctx = ctx;  in __drm_modeset_lock_all()
113 		drm_modeset_backoff(ctx);  in __drm_modeset_lock_all()
144 	struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx;  in drm_modeset_unlock_all()  local
146 	if (WARN_ON(!ctx))  in drm_modeset_unlock_all()
150 	drm_modeset_drop_locks(ctx);  in drm_modeset_unlock_all()
151 	drm_modeset_acquire_fini(ctx);  in drm_modeset_unlock_all()
153 	kfree(ctx);  in drm_modeset_unlock_all()
175 	struct drm_modeset_acquire_ctx *ctx;  in drm_modeset_lock_crtc()  local
178 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);  in drm_modeset_lock_crtc()
179 	if (WARN_ON(!ctx))  in drm_modeset_lock_crtc()
182 	drm_modeset_acquire_init(ctx, 0);  in drm_modeset_lock_crtc()
185 	ret = drm_modeset_lock(&crtc->mutex, ctx);  in drm_modeset_lock_crtc()
190 		ret = drm_modeset_lock(&plane->mutex, ctx);  in drm_modeset_lock_crtc()
195 			ret = drm_modeset_lock(&plane->crtc->mutex, ctx);  in drm_modeset_lock_crtc()
206 	crtc->acquire_ctx = ctx;  in drm_modeset_lock_crtc()
212 		drm_modeset_backoff(ctx);  in drm_modeset_lock_crtc()
248 	struct drm_modeset_acquire_ctx *ctx = crtc->acquire_ctx;  in drm_modeset_unlock_crtc()  local
250 	if (WARN_ON(!ctx))  in drm_modeset_unlock_crtc()
254 	drm_modeset_drop_locks(ctx);  in drm_modeset_unlock_crtc()
255 	drm_modeset_acquire_fini(ctx);  in drm_modeset_unlock_crtc()
257 	kfree(ctx);  in drm_modeset_unlock_crtc()
288 void drm_modeset_acquire_init(struct drm_modeset_acquire_ctx *ctx,  in drm_modeset_acquire_init()  argument
291 	memset(ctx, 0, sizeof(*ctx));  in drm_modeset_acquire_init()
292 	ww_acquire_init(&ctx->ww_ctx, &crtc_ww_class);  in drm_modeset_acquire_init()
293 	INIT_LIST_HEAD(&ctx->locked);  in drm_modeset_acquire_init()
301 void drm_modeset_acquire_fini(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_acquire_fini()  argument
303 	ww_acquire_fini(&ctx->ww_ctx);  in drm_modeset_acquire_fini()
313 void drm_modeset_drop_locks(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_drop_locks()  argument
315 	WARN_ON(ctx->contended);  in drm_modeset_drop_locks()
316 	while (!list_empty(&ctx->locked)) {  in drm_modeset_drop_locks()
319 		lock = list_first_entry(&ctx->locked,  in drm_modeset_drop_locks()
328 		struct drm_modeset_acquire_ctx *ctx,  in modeset_lock()  argument
333 	WARN_ON(ctx->contended);  in modeset_lock()
335 	if (ctx->trylock_only) {  in modeset_lock()
341 		ret = ww_mutex_lock_slow_interruptible(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
343 		ret = ww_mutex_lock_interruptible(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
345 		ww_mutex_lock_slow(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
348 		ret = ww_mutex_lock(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
352 		list_add(&lock->head, &ctx->locked);  in modeset_lock()
361 		ctx->contended = lock;  in modeset_lock()
367 static int modeset_backoff(struct drm_modeset_acquire_ctx *ctx,  in modeset_backoff()  argument
370 	struct drm_modeset_lock *contended = ctx->contended;  in modeset_backoff()
372 	ctx->contended = NULL;  in modeset_backoff()
377 	drm_modeset_drop_locks(ctx);  in modeset_backoff()
379 	return modeset_lock(contended, ctx, interruptible, true);  in modeset_backoff()
390 void drm_modeset_backoff(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_backoff()  argument
392 	modeset_backoff(ctx, false);  in drm_modeset_backoff()
402 int drm_modeset_backoff_interruptible(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_backoff_interruptible()  argument
404 	return modeset_backoff(ctx, true);  in drm_modeset_backoff_interruptible()
420 		struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_lock()  argument
422 	if (ctx)  in drm_modeset_lock()
423 		return modeset_lock(lock, ctx, false, false);  in drm_modeset_lock()
438 		struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_lock_interruptible()  argument
440 	if (ctx)  in drm_modeset_lock_interruptible()
441 		return modeset_lock(lock, ctx, true, false);  in drm_modeset_lock_interruptible()
461 		struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_lock_all_crtcs()  argument
469 		ret = drm_modeset_lock(&crtc->mutex, ctx);  in drm_modeset_lock_all_crtcs()
475 		ret = drm_modeset_lock(&plane->mutex, ctx);  in drm_modeset_lock_all_crtcs()