1 // SPDX-License-Identifier: GPL-2.0 or MIT
6 #include <linux/iosys-map.h>
30  * GEM drivers which provide a GEM based dumb buffer with a virtual address are supported.
35 	struct drm_device *dev = client->dev;  in drm_client_open()
38 	file = drm_file_alloc(dev->primary);  in drm_client_open()
42 	mutex_lock(&dev->filelist_mutex);  in drm_client_open()
43 	list_add(&file->lhead, &dev->filelist_internal);  in drm_client_open()
44 	mutex_unlock(&dev->filelist_mutex);  in drm_client_open()
46 	client->file = file;  in drm_client_open()
53 	struct drm_device *dev = client->dev;  in drm_client_close()
55 	mutex_lock(&dev->filelist_mutex);  in drm_client_close()
56 	list_del(&client->file->lhead);  in drm_client_close()
57 	mutex_unlock(&dev->filelist_mutex);  in drm_client_close()
59 	drm_file_free(client->file);  in drm_client_close()
63  * drm_client_init - Initialise a DRM client
82 	if (!drm_core_check_feature(dev, DRIVER_MODESET) || !dev->driver->dumb_create)  in drm_client_init()
83 		return -EOPNOTSUPP;  in drm_client_init()
85 	client->dev = dev;  in drm_client_init()
86 	client->name = name;  in drm_client_init()
87 	client->funcs = funcs;  in drm_client_init()
108  * drm_client_register - Register client
118  * to set up its display from pre-existing outputs. The client must have
123 	struct drm_device *dev = client->dev;  in drm_client_register()
126 	mutex_lock(&dev->clientlist_mutex);  in drm_client_register()
127 	list_add(&client->list, &dev->clientlist);  in drm_client_register()
129 	if (client->funcs && client->funcs->hotplug) {  in drm_client_register()
140 		ret = client->funcs->hotplug(client);  in drm_client_register()
144 	mutex_unlock(&dev->clientlist_mutex);  in drm_client_register()
149  * drm_client_release - Release DRM client resources
164 	struct drm_device *dev = client->dev;  in drm_client_release()
166 	drm_dbg_kms(dev, "%s\n", client->name);  in drm_client_release()
176 	if (buffer->gem) {  in drm_client_buffer_delete()
177 		drm_gem_vunmap_unlocked(buffer->gem, &buffer->map);  in drm_client_buffer_delete()
178 		drm_gem_object_put(buffer->gem);  in drm_client_buffer_delete()
185 drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height,  in drm_client_buffer_create()  argument
190 	struct drm_device *dev = client->dev;  in drm_client_buffer_create()
197 		return ERR_PTR(-ENOMEM);  in drm_client_buffer_create()
199 	buffer->client = client;  in drm_client_buffer_create()
201 	dumb_args.width = width;  in drm_client_buffer_create()
204 	ret = drm_mode_create_dumb(dev, &dumb_args, client->file);  in drm_client_buffer_create()
208 	obj = drm_gem_object_lookup(client->file, dumb_args.handle);  in drm_client_buffer_create()
210 		ret = -ENOENT;  in drm_client_buffer_create()
214 	buffer->pitch = dumb_args.pitch;  in drm_client_buffer_create()
215 	buffer->gem = obj;  in drm_client_buffer_create()
227  * drm_client_buffer_vmap_local - Map DRM client buffer into address space
229  * @map_copy: Returns the mapped memory's address
231  * This function maps a client buffer into kernel address space. If the
232  * buffer is already mapped, it returns the existing mapping's address.
237  * long-term mappings.
239  * The returned address is a copy of the internal value. In contrast to
249 	struct drm_gem_object *gem = buffer->gem;  in drm_client_buffer_vmap_local()
250 	struct iosys_map *map = &buffer->map;  in drm_client_buffer_vmap_local()
269  * drm_client_buffer_vunmap_local - Unmap DRM client buffer
278 	struct drm_gem_object *gem = buffer->gem;  in drm_client_buffer_vunmap_local()
279 	struct iosys_map *map = &buffer->map;  in drm_client_buffer_vunmap_local()
287  * drm_client_buffer_vmap - Map DRM client buffer into address space
289  * @map_copy: Returns the mapped memory's address
291  * This function maps a client buffer into kernel address space. If the
292  * buffer is already mapped, it returns the existing mapping's address.
299  * The returned address is a copy of the internal value. In contrast to
310 	struct drm_gem_object *gem = buffer->gem;  in drm_client_buffer_vmap()
311 	struct iosys_map *map = &buffer->map;  in drm_client_buffer_vmap()
330 	drm_gem_unpin_locked(buffer->gem);  in drm_client_buffer_vmap()
338  * drm_client_buffer_vunmap - Unmap DRM client buffer
347 	struct drm_gem_object *gem = buffer->gem;  in drm_client_buffer_vunmap()
348 	struct iosys_map *map = &buffer->map;  in drm_client_buffer_vunmap()
361 	if (!buffer->fb)  in drm_client_buffer_rmfb()
364 	ret = drm_mode_rmfb(buffer->client->dev, buffer->fb->base.id, buffer->client->file);  in drm_client_buffer_rmfb()
366 		drm_err(buffer->client->dev,  in drm_client_buffer_rmfb()
367 			"Error removing FB:%u (%d)\n", buffer->fb->base.id, ret);  in drm_client_buffer_rmfb()
369 	buffer->fb = NULL;  in drm_client_buffer_rmfb()
373 				   u32 width, u32 height, u32 format,  in drm_client_buffer_addfb()  argument
376 	struct drm_client_dev *client = buffer->client;  in drm_client_buffer_addfb()
380 	fb_req.width = width;  in drm_client_buffer_addfb()
384 	fb_req.pitches[0] = buffer->pitch;  in drm_client_buffer_addfb()
386 	ret = drm_mode_addfb2(client->dev, &fb_req, client->file);  in drm_client_buffer_addfb()
390 	buffer->fb = drm_framebuffer_lookup(client->dev, buffer->client->file, fb_req.fb_id);  in drm_client_buffer_addfb()
391 	if (WARN_ON(!buffer->fb))  in drm_client_buffer_addfb()
392 		return -ENOENT;  in drm_client_buffer_addfb()
395 	drm_framebuffer_put(buffer->fb);  in drm_client_buffer_addfb()
397 	strscpy(buffer->fb->comm, client->name, TASK_COMM_LEN);  in drm_client_buffer_addfb()
403  * drm_client_framebuffer_create - Create a client framebuffer
405  * @width: Framebuffer width
417 drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format)  in drm_client_framebuffer_create()  argument
423 	buffer = drm_client_buffer_create(client, width, height, format,  in drm_client_framebuffer_create()
428 	ret = drm_client_buffer_addfb(buffer, width, height, format, handle);  in drm_client_framebuffer_create()
433 	 * object as DMA-buf. The framebuffer and our buffer structure are still  in drm_client_framebuffer_create()
436 	drm_mode_destroy_dumb(client->dev, handle, client->file);  in drm_client_framebuffer_create()
448  * drm_client_framebuffer_delete - Delete a client framebuffer
462  * drm_client_framebuffer_flush - Manually flush client framebuffer
466  * This calls &drm_framebuffer_funcs->dirty (if present) to flush buffer changes
474 	if (!buffer || !buffer->fb || !buffer->fb->funcs->dirty)  in drm_client_framebuffer_flush()
479 			.x1 = rect->x1,  in drm_client_framebuffer_flush()
480 			.y1 = rect->y1,  in drm_client_framebuffer_flush()
481 			.x2 = rect->x2,  in drm_client_framebuffer_flush()
482 			.y2 = rect->y2,  in drm_client_framebuffer_flush()
485 		return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,  in drm_client_framebuffer_flush()
489 	return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file,  in drm_client_framebuffer_flush()