69 	struct drm_modeset_acquire_ctx *ctx;  in drm_modeset_lock_all()  local
72 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);  in drm_modeset_lock_all()
73 	if (WARN_ON(!ctx))  in drm_modeset_lock_all()
78 	drm_modeset_acquire_init(ctx, 0);  in drm_modeset_lock_all()
81 	ret = drm_modeset_lock(&config->connection_mutex, ctx);  in drm_modeset_lock_all()
84 	ret = drm_modeset_lock_all_crtcs(dev, ctx);  in drm_modeset_lock_all()
93 	config->acquire_ctx = ctx;  in drm_modeset_lock_all()
101 		drm_modeset_backoff(ctx);  in drm_modeset_lock_all()
105 	kfree(ctx);  in drm_modeset_lock_all()
118 	struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx;  in drm_modeset_unlock_all()  local
120 	if (WARN_ON(!ctx))  in drm_modeset_unlock_all()
124 	drm_modeset_drop_locks(ctx);  in drm_modeset_unlock_all()
125 	drm_modeset_acquire_fini(ctx);  in drm_modeset_unlock_all()
127 	kfree(ctx);  in drm_modeset_unlock_all()
149 	struct drm_modeset_acquire_ctx *ctx;  in drm_modeset_lock_crtc()  local
152 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);  in drm_modeset_lock_crtc()
153 	if (WARN_ON(!ctx))  in drm_modeset_lock_crtc()
156 	drm_modeset_acquire_init(ctx, 0);  in drm_modeset_lock_crtc()
159 	ret = drm_modeset_lock(&crtc->mutex, ctx);  in drm_modeset_lock_crtc()
164 		ret = drm_modeset_lock(&plane->mutex, ctx);  in drm_modeset_lock_crtc()
169 			ret = drm_modeset_lock(&plane->crtc->mutex, ctx);  in drm_modeset_lock_crtc()
180 	crtc->acquire_ctx = ctx;  in drm_modeset_lock_crtc()
186 		drm_modeset_backoff(ctx);  in drm_modeset_lock_crtc()
222 	struct drm_modeset_acquire_ctx *ctx = crtc->acquire_ctx;  in drm_modeset_unlock_crtc()  local
224 	if (WARN_ON(!ctx))  in drm_modeset_unlock_crtc()
228 	drm_modeset_drop_locks(ctx);  in drm_modeset_unlock_crtc()
229 	drm_modeset_acquire_fini(ctx);  in drm_modeset_unlock_crtc()
231 	kfree(ctx);  in drm_modeset_unlock_crtc()
262 void drm_modeset_acquire_init(struct drm_modeset_acquire_ctx *ctx,  in drm_modeset_acquire_init()  argument
265 	memset(ctx, 0, sizeof(*ctx));  in drm_modeset_acquire_init()
266 	ww_acquire_init(&ctx->ww_ctx, &crtc_ww_class);  in drm_modeset_acquire_init()
267 	INIT_LIST_HEAD(&ctx->locked);  in drm_modeset_acquire_init()
275 void drm_modeset_acquire_fini(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_acquire_fini()  argument
277 	ww_acquire_fini(&ctx->ww_ctx);  in drm_modeset_acquire_fini()
287 void drm_modeset_drop_locks(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_drop_locks()  argument
289 	WARN_ON(ctx->contended);  in drm_modeset_drop_locks()
290 	while (!list_empty(&ctx->locked)) {  in drm_modeset_drop_locks()
293 		lock = list_first_entry(&ctx->locked,  in drm_modeset_drop_locks()
302 		struct drm_modeset_acquire_ctx *ctx,  in modeset_lock()  argument
307 	WARN_ON(ctx->contended);  in modeset_lock()
309 	if (ctx->trylock_only) {  in modeset_lock()
310 		lockdep_assert_held(&ctx->ww_ctx);  in modeset_lock()
317 		ret = ww_mutex_lock_slow_interruptible(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
319 		ret = ww_mutex_lock_interruptible(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
321 		ww_mutex_lock_slow(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
324 		ret = ww_mutex_lock(&lock->mutex, &ctx->ww_ctx);  in modeset_lock()
328 		list_add(&lock->head, &ctx->locked);  in modeset_lock()
337 		ctx->contended = lock;  in modeset_lock()
343 static int modeset_backoff(struct drm_modeset_acquire_ctx *ctx,  in modeset_backoff()  argument
346 	struct drm_modeset_lock *contended = ctx->contended;  in modeset_backoff()
348 	ctx->contended = NULL;  in modeset_backoff()
353 	drm_modeset_drop_locks(ctx);  in modeset_backoff()
355 	return modeset_lock(contended, ctx, interruptible, true);  in modeset_backoff()
366 void drm_modeset_backoff(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_backoff()  argument
368 	modeset_backoff(ctx, false);  in drm_modeset_backoff()
378 int drm_modeset_backoff_interruptible(struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_backoff_interruptible()  argument
380 	return modeset_backoff(ctx, true);  in drm_modeset_backoff_interruptible()
396 		struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_lock()  argument
398 	if (ctx)  in drm_modeset_lock()
399 		return modeset_lock(lock, ctx, false, false);  in drm_modeset_lock()
414 		struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_lock_interruptible()  argument
416 	if (ctx)  in drm_modeset_lock_interruptible()
417 		return modeset_lock(lock, ctx, true, false);  in drm_modeset_lock_interruptible()
437 		struct drm_modeset_acquire_ctx *ctx)  in drm_modeset_lock_all_crtcs()  argument
444 		ret = drm_modeset_lock(&crtc->mutex, ctx);  in drm_modeset_lock_all_crtcs()
450 		ret = drm_modeset_lock(&plane->mutex, ctx);  in drm_modeset_lock_all_crtcs()