1df0e7f7eSEmmanuel Vadot // SPDX-License-Identifier: GPL-2.0 or MIT 2c76f0f7cSNoralf Trønnes /* 3c76f0f7cSNoralf Trønnes * Copyright 2018 Noralf Trønnes 4c76f0f7cSNoralf Trønnes */ 5c76f0f7cSNoralf Trønnes 67938f421SLucas De Marchi #include <linux/iosys-map.h> 7c76f0f7cSNoralf Trønnes #include <linux/list.h> 8c76f0f7cSNoralf Trønnes #include <linux/module.h> 9c76f0f7cSNoralf Trønnes #include <linux/mutex.h> 10c76f0f7cSNoralf Trønnes #include <linux/seq_file.h> 11c76f0f7cSNoralf Trønnes #include <linux/slab.h> 12c76f0f7cSNoralf Trønnes 13c76f0f7cSNoralf Trønnes #include <drm/drm_client.h> 14c76f0f7cSNoralf Trønnes #include <drm/drm_debugfs.h> 15c76f0f7cSNoralf Trønnes #include <drm/drm_device.h> 16c76f0f7cSNoralf Trønnes #include <drm/drm_drv.h> 17c76f0f7cSNoralf Trønnes #include <drm/drm_file.h> 18c76f0f7cSNoralf Trønnes #include <drm/drm_fourcc.h> 190500c04eSSam Ravnborg #include <drm/drm_framebuffer.h> 20c76f0f7cSNoralf Trønnes #include <drm/drm_gem.h> 21c76f0f7cSNoralf Trønnes #include <drm/drm_mode.h> 22c76f0f7cSNoralf Trønnes #include <drm/drm_print.h> 23c76f0f7cSNoralf Trønnes 24c76f0f7cSNoralf Trønnes #include "drm_crtc_internal.h" 25c76f0f7cSNoralf Trønnes #include "drm_internal.h" 26c76f0f7cSNoralf Trønnes 27c76f0f7cSNoralf Trønnes /** 28c76f0f7cSNoralf Trønnes * DOC: overview 29c76f0f7cSNoralf Trønnes * 30c76f0f7cSNoralf Trønnes * This library provides support for clients running in the kernel like fbdev and bootsplash. 31c76f0f7cSNoralf Trønnes * 32c76f0f7cSNoralf Trønnes * GEM drivers which provide a GEM based dumb buffer with a virtual address are supported. 33c76f0f7cSNoralf Trønnes */ 34c76f0f7cSNoralf Trønnes 35c76f0f7cSNoralf Trønnes static int drm_client_open(struct drm_client_dev *client) 36c76f0f7cSNoralf Trønnes { 37c76f0f7cSNoralf Trønnes struct drm_device *dev = client->dev; 38c76f0f7cSNoralf Trønnes struct drm_file *file; 39c76f0f7cSNoralf Trønnes 40c76f0f7cSNoralf Trønnes file = drm_file_alloc(dev->primary); 41c76f0f7cSNoralf Trønnes if (IS_ERR(file)) 42c76f0f7cSNoralf Trønnes return PTR_ERR(file); 43c76f0f7cSNoralf Trønnes 44c76f0f7cSNoralf Trønnes mutex_lock(&dev->filelist_mutex); 45c76f0f7cSNoralf Trønnes list_add(&file->lhead, &dev->filelist_internal); 46c76f0f7cSNoralf Trønnes mutex_unlock(&dev->filelist_mutex); 47c76f0f7cSNoralf Trønnes 48c76f0f7cSNoralf Trønnes client->file = file; 49c76f0f7cSNoralf Trønnes 50c76f0f7cSNoralf Trønnes return 0; 51c76f0f7cSNoralf Trønnes } 52c76f0f7cSNoralf Trønnes 53c76f0f7cSNoralf Trønnes static void drm_client_close(struct drm_client_dev *client) 54c76f0f7cSNoralf Trønnes { 55c76f0f7cSNoralf Trønnes struct drm_device *dev = client->dev; 56c76f0f7cSNoralf Trønnes 57c76f0f7cSNoralf Trønnes mutex_lock(&dev->filelist_mutex); 58c76f0f7cSNoralf Trønnes list_del(&client->file->lhead); 59c76f0f7cSNoralf Trønnes mutex_unlock(&dev->filelist_mutex); 60c76f0f7cSNoralf Trønnes 61c76f0f7cSNoralf Trønnes drm_file_free(client->file); 62c76f0f7cSNoralf Trønnes } 63c76f0f7cSNoralf Trønnes 64c76f0f7cSNoralf Trønnes /** 654d4c2d89SNoralf Trønnes * drm_client_init - Initialise a DRM client 66c76f0f7cSNoralf Trønnes * @dev: DRM device 67c76f0f7cSNoralf Trønnes * @client: DRM client 68c76f0f7cSNoralf Trønnes * @name: Client name 69c76f0f7cSNoralf Trønnes * @funcs: DRM client functions (optional) 70c76f0f7cSNoralf Trønnes * 71e33898a2SNoralf Trønnes * This initialises the client and opens a &drm_file. 72e33898a2SNoralf Trønnes * Use drm_client_register() to complete the process. 73c76f0f7cSNoralf Trønnes * The caller needs to hold a reference on @dev before calling this function. 74c76f0f7cSNoralf Trønnes * The client is freed when the &drm_device is unregistered. See drm_client_release(). 75c76f0f7cSNoralf Trønnes * 76c76f0f7cSNoralf Trønnes * Returns: 77c76f0f7cSNoralf Trønnes * Zero on success or negative error code on failure. 78c76f0f7cSNoralf Trønnes */ 794d4c2d89SNoralf Trønnes int drm_client_init(struct drm_device *dev, struct drm_client_dev *client, 80c76f0f7cSNoralf Trønnes const char *name, const struct drm_client_funcs *funcs) 81c76f0f7cSNoralf Trønnes { 82c76f0f7cSNoralf Trønnes int ret; 83c76f0f7cSNoralf Trønnes 84b39b5394SNoralf Trønnes if (!drm_core_check_feature(dev, DRIVER_MODESET) || !dev->driver->dumb_create) 8569fdf420SChris Wilson return -EOPNOTSUPP; 86c76f0f7cSNoralf Trønnes 87c76f0f7cSNoralf Trønnes if (funcs && !try_module_get(funcs->owner)) 88c76f0f7cSNoralf Trønnes return -ENODEV; 89c76f0f7cSNoralf Trønnes 90c76f0f7cSNoralf Trønnes client->dev = dev; 91c76f0f7cSNoralf Trønnes client->name = name; 92c76f0f7cSNoralf Trønnes client->funcs = funcs; 93c76f0f7cSNoralf Trønnes 94d81294afSNoralf Trønnes ret = drm_client_modeset_create(client); 95c76f0f7cSNoralf Trønnes if (ret) 96c76f0f7cSNoralf Trønnes goto err_put_module; 97c76f0f7cSNoralf Trønnes 98d81294afSNoralf Trønnes ret = drm_client_open(client); 99d81294afSNoralf Trønnes if (ret) 100d81294afSNoralf Trønnes goto err_free; 101d81294afSNoralf Trønnes 102c76f0f7cSNoralf Trønnes drm_dev_get(dev); 103c76f0f7cSNoralf Trønnes 104c76f0f7cSNoralf Trønnes return 0; 105c76f0f7cSNoralf Trønnes 106d81294afSNoralf Trønnes err_free: 107d81294afSNoralf Trønnes drm_client_modeset_free(client); 108c76f0f7cSNoralf Trønnes err_put_module: 109c76f0f7cSNoralf Trønnes if (funcs) 110c76f0f7cSNoralf Trønnes module_put(funcs->owner); 111c76f0f7cSNoralf Trønnes 112c76f0f7cSNoralf Trønnes return ret; 113c76f0f7cSNoralf Trønnes } 1144d4c2d89SNoralf Trønnes EXPORT_SYMBOL(drm_client_init); 1154d4c2d89SNoralf Trønnes 1164d4c2d89SNoralf Trønnes /** 117e33898a2SNoralf Trønnes * drm_client_register - Register client 1184d4c2d89SNoralf Trønnes * @client: DRM client 1194d4c2d89SNoralf Trønnes * 1204d4c2d89SNoralf Trønnes * Add the client to the &drm_device client list to activate its callbacks. 1214d4c2d89SNoralf Trønnes * @client must be initialized by a call to drm_client_init(). After 122e33898a2SNoralf Trønnes * drm_client_register() it is no longer permissible to call drm_client_release() 1234d4c2d89SNoralf Trønnes * directly (outside the unregister callback), instead cleanup will happen 1244d4c2d89SNoralf Trønnes * automatically on driver unload. 12527655b9bSThomas Zimmermann * 12627655b9bSThomas Zimmermann * Registering a client generates a hotplug event that allows the client 12727655b9bSThomas Zimmermann * to set up its display from pre-existing outputs. The client must have 12827655b9bSThomas Zimmermann * initialized its state to able to handle the hotplug event successfully. 1294d4c2d89SNoralf Trønnes */ 130e33898a2SNoralf Trønnes void drm_client_register(struct drm_client_dev *client) 1314d4c2d89SNoralf Trønnes { 1324d4c2d89SNoralf Trønnes struct drm_device *dev = client->dev; 13327655b9bSThomas Zimmermann int ret; 1344d4c2d89SNoralf Trønnes 1354d4c2d89SNoralf Trønnes mutex_lock(&dev->clientlist_mutex); 1364d4c2d89SNoralf Trønnes list_add(&client->list, &dev->clientlist); 13727655b9bSThomas Zimmermann 13827655b9bSThomas Zimmermann if (client->funcs && client->funcs->hotplug) { 13927655b9bSThomas Zimmermann /* 14027655b9bSThomas Zimmermann * Perform an initial hotplug event to pick up the 14127655b9bSThomas Zimmermann * display configuration for the client. This step 14227655b9bSThomas Zimmermann * has to be performed *after* registering the client 14327655b9bSThomas Zimmermann * in the list of clients, or a concurrent hotplug 14427655b9bSThomas Zimmermann * event might be lost; leaving the display off. 14527655b9bSThomas Zimmermann * 14627655b9bSThomas Zimmermann * Hold the clientlist_mutex as for a regular hotplug 14727655b9bSThomas Zimmermann * event. 14827655b9bSThomas Zimmermann */ 14927655b9bSThomas Zimmermann ret = client->funcs->hotplug(client); 15027655b9bSThomas Zimmermann if (ret) 15127655b9bSThomas Zimmermann drm_dbg_kms(dev, "client hotplug ret=%d\n", ret); 15227655b9bSThomas Zimmermann } 1534d4c2d89SNoralf Trønnes mutex_unlock(&dev->clientlist_mutex); 1544d4c2d89SNoralf Trønnes } 155e33898a2SNoralf Trønnes EXPORT_SYMBOL(drm_client_register); 156c76f0f7cSNoralf Trønnes 157c76f0f7cSNoralf Trønnes /** 158c76f0f7cSNoralf Trønnes * drm_client_release - Release DRM client resources 159c76f0f7cSNoralf Trønnes * @client: DRM client 160c76f0f7cSNoralf Trønnes * 1614d4c2d89SNoralf Trønnes * Releases resources by closing the &drm_file that was opened by drm_client_init(). 162c76f0f7cSNoralf Trønnes * It is called automatically if the &drm_client_funcs.unregister callback is _not_ set. 163c76f0f7cSNoralf Trønnes * 164c76f0f7cSNoralf Trønnes * This function should only be called from the unregister callback. An exception 165c76f0f7cSNoralf Trønnes * is fbdev which cannot free the buffer if userspace has open file descriptors. 166c76f0f7cSNoralf Trønnes * 167c76f0f7cSNoralf Trønnes * Note: 168c76f0f7cSNoralf Trønnes * Clients cannot initiate a release by themselves. This is done to keep the code simple. 169c76f0f7cSNoralf Trønnes * The driver has to be unloaded before the client can be unloaded. 170c76f0f7cSNoralf Trønnes */ 171c76f0f7cSNoralf Trønnes void drm_client_release(struct drm_client_dev *client) 172c76f0f7cSNoralf Trønnes { 173c76f0f7cSNoralf Trønnes struct drm_device *dev = client->dev; 174c76f0f7cSNoralf Trønnes 17541cb6603SJani Nikula drm_dbg_kms(dev, "%s\n", client->name); 176c76f0f7cSNoralf Trønnes 177d81294afSNoralf Trønnes drm_client_modeset_free(client); 178c76f0f7cSNoralf Trønnes drm_client_close(client); 179c76f0f7cSNoralf Trønnes drm_dev_put(dev); 180c76f0f7cSNoralf Trønnes if (client->funcs) 181c76f0f7cSNoralf Trønnes module_put(client->funcs->owner); 182c76f0f7cSNoralf Trønnes } 183c76f0f7cSNoralf Trønnes EXPORT_SYMBOL(drm_client_release); 184c76f0f7cSNoralf Trønnes 185c76f0f7cSNoralf Trønnes void drm_client_dev_unregister(struct drm_device *dev) 186c76f0f7cSNoralf Trønnes { 187c76f0f7cSNoralf Trønnes struct drm_client_dev *client, *tmp; 188c76f0f7cSNoralf Trønnes 189c76f0f7cSNoralf Trønnes if (!drm_core_check_feature(dev, DRIVER_MODESET)) 190c76f0f7cSNoralf Trønnes return; 191c76f0f7cSNoralf Trønnes 192c76f0f7cSNoralf Trønnes mutex_lock(&dev->clientlist_mutex); 193c76f0f7cSNoralf Trønnes list_for_each_entry_safe(client, tmp, &dev->clientlist, list) { 194c76f0f7cSNoralf Trønnes list_del(&client->list); 195c76f0f7cSNoralf Trønnes if (client->funcs && client->funcs->unregister) { 196c76f0f7cSNoralf Trønnes client->funcs->unregister(client); 197c76f0f7cSNoralf Trønnes } else { 198c76f0f7cSNoralf Trønnes drm_client_release(client); 199c76f0f7cSNoralf Trønnes kfree(client); 200c76f0f7cSNoralf Trønnes } 201c76f0f7cSNoralf Trønnes } 202c76f0f7cSNoralf Trønnes mutex_unlock(&dev->clientlist_mutex); 203c76f0f7cSNoralf Trønnes } 204c76f0f7cSNoralf Trønnes 205c76f0f7cSNoralf Trønnes /** 206c76f0f7cSNoralf Trønnes * drm_client_dev_hotplug - Send hotplug event to clients 207c76f0f7cSNoralf Trønnes * @dev: DRM device 208c76f0f7cSNoralf Trønnes * 209c76f0f7cSNoralf Trønnes * This function calls the &drm_client_funcs.hotplug callback on the attached clients. 210c76f0f7cSNoralf Trønnes * 211c76f0f7cSNoralf Trønnes * drm_kms_helper_hotplug_event() calls this function, so drivers that use it 212c76f0f7cSNoralf Trønnes * don't need to call this function themselves. 213c76f0f7cSNoralf Trønnes */ 214c76f0f7cSNoralf Trønnes void drm_client_dev_hotplug(struct drm_device *dev) 215c76f0f7cSNoralf Trønnes { 216c76f0f7cSNoralf Trønnes struct drm_client_dev *client; 217c76f0f7cSNoralf Trønnes int ret; 218c76f0f7cSNoralf Trønnes 219c76f0f7cSNoralf Trønnes if (!drm_core_check_feature(dev, DRIVER_MODESET)) 220c76f0f7cSNoralf Trønnes return; 221c76f0f7cSNoralf Trønnes 222c2bb3be6SThomas Zimmermann if (!dev->mode_config.num_connector) { 223c2bb3be6SThomas Zimmermann drm_dbg_kms(dev, "No connectors found, will not send hotplug events!\n"); 224c2bb3be6SThomas Zimmermann return; 225c2bb3be6SThomas Zimmermann } 226c2bb3be6SThomas Zimmermann 227c76f0f7cSNoralf Trønnes mutex_lock(&dev->clientlist_mutex); 228c76f0f7cSNoralf Trønnes list_for_each_entry(client, &dev->clientlist, list) { 229c76f0f7cSNoralf Trønnes if (!client->funcs || !client->funcs->hotplug) 230c76f0f7cSNoralf Trønnes continue; 231c76f0f7cSNoralf Trønnes 2326a9d5ad3SThomas Zimmermann if (client->hotplug_failed) 2336a9d5ad3SThomas Zimmermann continue; 2346a9d5ad3SThomas Zimmermann 235c76f0f7cSNoralf Trønnes ret = client->funcs->hotplug(client); 23641cb6603SJani Nikula drm_dbg_kms(dev, "%s: ret=%d\n", client->name, ret); 2376a9d5ad3SThomas Zimmermann if (ret) 2386a9d5ad3SThomas Zimmermann client->hotplug_failed = true; 239c76f0f7cSNoralf Trønnes } 240c76f0f7cSNoralf Trønnes mutex_unlock(&dev->clientlist_mutex); 241c76f0f7cSNoralf Trønnes } 242c76f0f7cSNoralf Trønnes EXPORT_SYMBOL(drm_client_dev_hotplug); 243c76f0f7cSNoralf Trønnes 244c76f0f7cSNoralf Trønnes void drm_client_dev_restore(struct drm_device *dev) 245c76f0f7cSNoralf Trønnes { 246c76f0f7cSNoralf Trønnes struct drm_client_dev *client; 247c76f0f7cSNoralf Trønnes int ret; 248c76f0f7cSNoralf Trønnes 249c76f0f7cSNoralf Trønnes if (!drm_core_check_feature(dev, DRIVER_MODESET)) 250c76f0f7cSNoralf Trønnes return; 251c76f0f7cSNoralf Trønnes 252c76f0f7cSNoralf Trønnes mutex_lock(&dev->clientlist_mutex); 253c76f0f7cSNoralf Trønnes list_for_each_entry(client, &dev->clientlist, list) { 254c76f0f7cSNoralf Trønnes if (!client->funcs || !client->funcs->restore) 255c76f0f7cSNoralf Trønnes continue; 256c76f0f7cSNoralf Trønnes 257c76f0f7cSNoralf Trønnes ret = client->funcs->restore(client); 25841cb6603SJani Nikula drm_dbg_kms(dev, "%s: ret=%d\n", client->name, ret); 259c76f0f7cSNoralf Trønnes if (!ret) /* The first one to return zero gets the privilege to restore */ 260c76f0f7cSNoralf Trønnes break; 261c76f0f7cSNoralf Trønnes } 262c76f0f7cSNoralf Trønnes mutex_unlock(&dev->clientlist_mutex); 263c76f0f7cSNoralf Trønnes } 264c76f0f7cSNoralf Trønnes 265c76f0f7cSNoralf Trønnes static void drm_client_buffer_delete(struct drm_client_buffer *buffer) 266c76f0f7cSNoralf Trønnes { 267444bbba7SDmitry Osipenko if (buffer->gem) { 26827b2ae65SDmitry Osipenko drm_gem_vunmap_unlocked(buffer->gem, &buffer->map); 269be6ee102SEmil Velikov drm_gem_object_put(buffer->gem); 270444bbba7SDmitry Osipenko } 271c76f0f7cSNoralf Trønnes 272c76f0f7cSNoralf Trønnes kfree(buffer); 273c76f0f7cSNoralf Trønnes } 274c76f0f7cSNoralf Trønnes 275c76f0f7cSNoralf Trønnes static struct drm_client_buffer * 27685e26dd5SChristian König drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height, 27785e26dd5SChristian König u32 format, u32 *handle) 278c76f0f7cSNoralf Trønnes { 27924c478eaSMaxime Ripard const struct drm_format_info *info = drm_format_info(format); 280c76f0f7cSNoralf Trønnes struct drm_mode_create_dumb dumb_args = { }; 281c76f0f7cSNoralf Trønnes struct drm_device *dev = client->dev; 282c76f0f7cSNoralf Trønnes struct drm_client_buffer *buffer; 283c76f0f7cSNoralf Trønnes struct drm_gem_object *obj; 284c76f0f7cSNoralf Trønnes int ret; 285c76f0f7cSNoralf Trønnes 286c76f0f7cSNoralf Trønnes buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); 287c76f0f7cSNoralf Trønnes if (!buffer) 288c76f0f7cSNoralf Trønnes return ERR_PTR(-ENOMEM); 289c76f0f7cSNoralf Trønnes 290c76f0f7cSNoralf Trønnes buffer->client = client; 291c76f0f7cSNoralf Trønnes 292c76f0f7cSNoralf Trønnes dumb_args.width = width; 293c76f0f7cSNoralf Trønnes dumb_args.height = height; 294356d2c8eSGeert Uytterhoeven dumb_args.bpp = drm_format_info_bpp(info, 0); 295c76f0f7cSNoralf Trønnes ret = drm_mode_create_dumb(dev, &dumb_args, client->file); 296c76f0f7cSNoralf Trønnes if (ret) 297cf19fa2cSNoralf Trønnes goto err_delete; 298c76f0f7cSNoralf Trønnes 299c76f0f7cSNoralf Trønnes obj = drm_gem_object_lookup(client->file, dumb_args.handle); 300c76f0f7cSNoralf Trønnes if (!obj) { 301c76f0f7cSNoralf Trønnes ret = -ENOENT; 302c76f0f7cSNoralf Trønnes goto err_delete; 303c76f0f7cSNoralf Trønnes } 304c76f0f7cSNoralf Trønnes 30585e26dd5SChristian König buffer->pitch = dumb_args.pitch; 306c76f0f7cSNoralf Trønnes buffer->gem = obj; 30785e26dd5SChristian König *handle = dumb_args.handle; 308c76f0f7cSNoralf Trønnes 309c76f0f7cSNoralf Trønnes return buffer; 310c76f0f7cSNoralf Trønnes 311c76f0f7cSNoralf Trønnes err_delete: 312c76f0f7cSNoralf Trønnes drm_client_buffer_delete(buffer); 313c76f0f7cSNoralf Trønnes 314c76f0f7cSNoralf Trønnes return ERR_PTR(ret); 315c76f0f7cSNoralf Trønnes } 316c76f0f7cSNoralf Trønnes 31715dd0fc8SThomas Zimmermann /** 31815dd0fc8SThomas Zimmermann * drm_client_buffer_vmap - Map DRM client buffer into address space 31915dd0fc8SThomas Zimmermann * @buffer: DRM client buffer 320a8595556SThomas Zimmermann * @map_copy: Returns the mapped memory's address 32115dd0fc8SThomas Zimmermann * 32215dd0fc8SThomas Zimmermann * This function maps a client buffer into kernel address space. If the 323a8595556SThomas Zimmermann * buffer is already mapped, it returns the existing mapping's address. 32415dd0fc8SThomas Zimmermann * 32515dd0fc8SThomas Zimmermann * Client buffer mappings are not ref'counted. Each call to 32615dd0fc8SThomas Zimmermann * drm_client_buffer_vmap() should be followed by a call to 32715dd0fc8SThomas Zimmermann * drm_client_buffer_vunmap(); or the client buffer should be mapped 328cf1ca9aeSThomas Zimmermann * throughout its lifetime. 32915dd0fc8SThomas Zimmermann * 330a8595556SThomas Zimmermann * The returned address is a copy of the internal value. In contrast to 331a8595556SThomas Zimmermann * other vmap interfaces, you don't need it for the client's vunmap 332a8595556SThomas Zimmermann * function. So you can modify it at will during blit and draw operations. 333a8595556SThomas Zimmermann * 33415dd0fc8SThomas Zimmermann * Returns: 335a8595556SThomas Zimmermann * 0 on success, or a negative errno code otherwise. 33615dd0fc8SThomas Zimmermann */ 337a8595556SThomas Zimmermann int 3387938f421SLucas De Marchi drm_client_buffer_vmap(struct drm_client_buffer *buffer, 3397938f421SLucas De Marchi struct iosys_map *map_copy) 34015dd0fc8SThomas Zimmermann { 3417938f421SLucas De Marchi struct iosys_map *map = &buffer->map; 342a745fb1cSThomas Zimmermann int ret; 34315dd0fc8SThomas Zimmermann 34415dd0fc8SThomas Zimmermann /* 34515dd0fc8SThomas Zimmermann * FIXME: The dependency on GEM here isn't required, we could 34615dd0fc8SThomas Zimmermann * convert the driver handle to a dma-buf instead and use the 34715dd0fc8SThomas Zimmermann * backend-agnostic dma-buf vmap support instead. This would 34815dd0fc8SThomas Zimmermann * require that the handle2fd prime ioctl is reworked to pull the 34915dd0fc8SThomas Zimmermann * fd_install step out of the driver backend hooks, to make that 35015dd0fc8SThomas Zimmermann * final step optional for internal users. 35115dd0fc8SThomas Zimmermann */ 35279e2cf2eSDmitry Osipenko ret = drm_gem_vmap_unlocked(buffer->gem, map); 353a745fb1cSThomas Zimmermann if (ret) 354a8595556SThomas Zimmermann return ret; 35515dd0fc8SThomas Zimmermann 356a8595556SThomas Zimmermann *map_copy = *map; 35715dd0fc8SThomas Zimmermann 358a8595556SThomas Zimmermann return 0; 35915dd0fc8SThomas Zimmermann } 36015dd0fc8SThomas Zimmermann EXPORT_SYMBOL(drm_client_buffer_vmap); 36115dd0fc8SThomas Zimmermann 36215dd0fc8SThomas Zimmermann /** 36315dd0fc8SThomas Zimmermann * drm_client_buffer_vunmap - Unmap DRM client buffer 36415dd0fc8SThomas Zimmermann * @buffer: DRM client buffer 36515dd0fc8SThomas Zimmermann * 366cf1ca9aeSThomas Zimmermann * This function removes a client buffer's memory mapping. Calling this 367cf1ca9aeSThomas Zimmermann * function is only required by clients that manage their buffer mappings 368cf1ca9aeSThomas Zimmermann * by themselves. 36915dd0fc8SThomas Zimmermann */ 37015dd0fc8SThomas Zimmermann void drm_client_buffer_vunmap(struct drm_client_buffer *buffer) 37115dd0fc8SThomas Zimmermann { 3727938f421SLucas De Marchi struct iosys_map *map = &buffer->map; 373a745fb1cSThomas Zimmermann 37479e2cf2eSDmitry Osipenko drm_gem_vunmap_unlocked(buffer->gem, map); 37515dd0fc8SThomas Zimmermann } 37615dd0fc8SThomas Zimmermann EXPORT_SYMBOL(drm_client_buffer_vunmap); 37715dd0fc8SThomas Zimmermann 378c76f0f7cSNoralf Trønnes static void drm_client_buffer_rmfb(struct drm_client_buffer *buffer) 379c76f0f7cSNoralf Trønnes { 380c76f0f7cSNoralf Trønnes int ret; 381c76f0f7cSNoralf Trønnes 382c76f0f7cSNoralf Trønnes if (!buffer->fb) 383c76f0f7cSNoralf Trønnes return; 384c76f0f7cSNoralf Trønnes 385c76f0f7cSNoralf Trønnes ret = drm_mode_rmfb(buffer->client->dev, buffer->fb->base.id, buffer->client->file); 386c76f0f7cSNoralf Trønnes if (ret) 38741cb6603SJani Nikula drm_err(buffer->client->dev, 388c76f0f7cSNoralf Trønnes "Error removing FB:%u (%d)\n", buffer->fb->base.id, ret); 389c76f0f7cSNoralf Trønnes 390c76f0f7cSNoralf Trønnes buffer->fb = NULL; 391c76f0f7cSNoralf Trønnes } 392c76f0f7cSNoralf Trønnes 393c76f0f7cSNoralf Trønnes static int drm_client_buffer_addfb(struct drm_client_buffer *buffer, 39485e26dd5SChristian König u32 width, u32 height, u32 format, 39585e26dd5SChristian König u32 handle) 396c76f0f7cSNoralf Trønnes { 397c76f0f7cSNoralf Trønnes struct drm_client_dev *client = buffer->client; 398c76f0f7cSNoralf Trønnes struct drm_mode_fb_cmd fb_req = { }; 399c76f0f7cSNoralf Trønnes const struct drm_format_info *info; 400c76f0f7cSNoralf Trønnes int ret; 401c76f0f7cSNoralf Trønnes 402c76f0f7cSNoralf Trønnes info = drm_format_info(format); 403356d2c8eSGeert Uytterhoeven fb_req.bpp = drm_format_info_bpp(info, 0); 404c76f0f7cSNoralf Trønnes fb_req.depth = info->depth; 405c76f0f7cSNoralf Trønnes fb_req.width = width; 406c76f0f7cSNoralf Trønnes fb_req.height = height; 40785e26dd5SChristian König fb_req.handle = handle; 408c76f0f7cSNoralf Trønnes fb_req.pitch = buffer->pitch; 409c76f0f7cSNoralf Trønnes 410c76f0f7cSNoralf Trønnes ret = drm_mode_addfb(client->dev, &fb_req, client->file); 411c76f0f7cSNoralf Trønnes if (ret) 412c76f0f7cSNoralf Trønnes return ret; 413c76f0f7cSNoralf Trønnes 414c76f0f7cSNoralf Trønnes buffer->fb = drm_framebuffer_lookup(client->dev, buffer->client->file, fb_req.fb_id); 415c76f0f7cSNoralf Trønnes if (WARN_ON(!buffer->fb)) 416c76f0f7cSNoralf Trønnes return -ENOENT; 417c76f0f7cSNoralf Trønnes 418c76f0f7cSNoralf Trønnes /* drop the reference we picked up in framebuffer lookup */ 419c76f0f7cSNoralf Trønnes drm_framebuffer_put(buffer->fb); 420c76f0f7cSNoralf Trønnes 421c76f0f7cSNoralf Trønnes strscpy(buffer->fb->comm, client->name, TASK_COMM_LEN); 422c76f0f7cSNoralf Trønnes 423c76f0f7cSNoralf Trønnes return 0; 424c76f0f7cSNoralf Trønnes } 425c76f0f7cSNoralf Trønnes 426c76f0f7cSNoralf Trønnes /** 427c76f0f7cSNoralf Trønnes * drm_client_framebuffer_create - Create a client framebuffer 428c76f0f7cSNoralf Trønnes * @client: DRM client 429c76f0f7cSNoralf Trønnes * @width: Framebuffer width 430c76f0f7cSNoralf Trønnes * @height: Framebuffer height 431c76f0f7cSNoralf Trønnes * @format: Buffer format 432c76f0f7cSNoralf Trønnes * 433c76f0f7cSNoralf Trønnes * This function creates a &drm_client_buffer which consists of a 434c76f0f7cSNoralf Trønnes * &drm_framebuffer backed by a dumb buffer. 435c76f0f7cSNoralf Trønnes * Call drm_client_framebuffer_delete() to free the buffer. 436c76f0f7cSNoralf Trønnes * 437c76f0f7cSNoralf Trønnes * Returns: 438c76f0f7cSNoralf Trønnes * Pointer to a client buffer or an error pointer on failure. 439c76f0f7cSNoralf Trønnes */ 440c76f0f7cSNoralf Trønnes struct drm_client_buffer * 441c76f0f7cSNoralf Trønnes drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format) 442c76f0f7cSNoralf Trønnes { 443c76f0f7cSNoralf Trønnes struct drm_client_buffer *buffer; 44485e26dd5SChristian König u32 handle; 445c76f0f7cSNoralf Trønnes int ret; 446c76f0f7cSNoralf Trønnes 44785e26dd5SChristian König buffer = drm_client_buffer_create(client, width, height, format, 44885e26dd5SChristian König &handle); 449c76f0f7cSNoralf Trønnes if (IS_ERR(buffer)) 450c76f0f7cSNoralf Trønnes return buffer; 451c76f0f7cSNoralf Trønnes 45285e26dd5SChristian König ret = drm_client_buffer_addfb(buffer, width, height, format, handle); 45385e26dd5SChristian König 45485e26dd5SChristian König /* 45585e26dd5SChristian König * The handle is only needed for creating the framebuffer, destroy it 45685e26dd5SChristian König * again to solve a circular dependency should anybody export the GEM 45785e26dd5SChristian König * object as DMA-buf. The framebuffer and our buffer structure are still 45885e26dd5SChristian König * holding references to the GEM object to prevent its destruction. 45985e26dd5SChristian König */ 46085e26dd5SChristian König drm_mode_destroy_dumb(client->dev, handle, client->file); 46185e26dd5SChristian König 462c76f0f7cSNoralf Trønnes if (ret) { 463c76f0f7cSNoralf Trønnes drm_client_buffer_delete(buffer); 464c76f0f7cSNoralf Trønnes return ERR_PTR(ret); 465c76f0f7cSNoralf Trønnes } 466c76f0f7cSNoralf Trønnes 467c76f0f7cSNoralf Trønnes return buffer; 468c76f0f7cSNoralf Trønnes } 469c76f0f7cSNoralf Trønnes EXPORT_SYMBOL(drm_client_framebuffer_create); 470c76f0f7cSNoralf Trønnes 471c76f0f7cSNoralf Trønnes /** 472c76f0f7cSNoralf Trønnes * drm_client_framebuffer_delete - Delete a client framebuffer 473c76f0f7cSNoralf Trønnes * @buffer: DRM client buffer (can be NULL) 474c76f0f7cSNoralf Trønnes */ 475c76f0f7cSNoralf Trønnes void drm_client_framebuffer_delete(struct drm_client_buffer *buffer) 476c76f0f7cSNoralf Trønnes { 477c76f0f7cSNoralf Trønnes if (!buffer) 478c76f0f7cSNoralf Trønnes return; 479c76f0f7cSNoralf Trønnes 480c76f0f7cSNoralf Trønnes drm_client_buffer_rmfb(buffer); 481c76f0f7cSNoralf Trønnes drm_client_buffer_delete(buffer); 482c76f0f7cSNoralf Trønnes } 483c76f0f7cSNoralf Trønnes EXPORT_SYMBOL(drm_client_framebuffer_delete); 484e896c132SNoralf Trønnes 485c9c03e3cSNoralf Trønnes /** 486c9c03e3cSNoralf Trønnes * drm_client_framebuffer_flush - Manually flush client framebuffer 487c9c03e3cSNoralf Trønnes * @buffer: DRM client buffer (can be NULL) 488c9c03e3cSNoralf Trønnes * @rect: Damage rectangle (if NULL flushes all) 489c9c03e3cSNoralf Trønnes * 490c9c03e3cSNoralf Trønnes * This calls &drm_framebuffer_funcs->dirty (if present) to flush buffer changes 491c9c03e3cSNoralf Trønnes * for drivers that need it. 492c9c03e3cSNoralf Trønnes * 493c9c03e3cSNoralf Trønnes * Returns: 494c9c03e3cSNoralf Trønnes * Zero on success or negative error code on failure. 495c9c03e3cSNoralf Trønnes */ 496c9c03e3cSNoralf Trønnes int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect) 497c9c03e3cSNoralf Trønnes { 498c9c03e3cSNoralf Trønnes if (!buffer || !buffer->fb || !buffer->fb->funcs->dirty) 499c9c03e3cSNoralf Trønnes return 0; 500c9c03e3cSNoralf Trønnes 501c9c03e3cSNoralf Trønnes if (rect) { 502c9c03e3cSNoralf Trønnes struct drm_clip_rect clip = { 503c9c03e3cSNoralf Trønnes .x1 = rect->x1, 504c9c03e3cSNoralf Trønnes .y1 = rect->y1, 505c9c03e3cSNoralf Trønnes .x2 = rect->x2, 506c9c03e3cSNoralf Trønnes .y2 = rect->y2, 507c9c03e3cSNoralf Trønnes }; 508c9c03e3cSNoralf Trønnes 509c9c03e3cSNoralf Trønnes return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file, 510c9c03e3cSNoralf Trønnes 0, 0, &clip, 1); 511c9c03e3cSNoralf Trønnes } 512c9c03e3cSNoralf Trønnes 513c9c03e3cSNoralf Trønnes return buffer->fb->funcs->dirty(buffer->fb, buffer->client->file, 514c9c03e3cSNoralf Trønnes 0, 0, NULL, 0); 515c9c03e3cSNoralf Trønnes } 516c9c03e3cSNoralf Trønnes EXPORT_SYMBOL(drm_client_framebuffer_flush); 517c9c03e3cSNoralf Trønnes 518e896c132SNoralf Trønnes #ifdef CONFIG_DEBUG_FS 519e896c132SNoralf Trønnes static int drm_client_debugfs_internal_clients(struct seq_file *m, void *data) 520e896c132SNoralf Trønnes { 5216fd80729SMaíra Canal struct drm_debugfs_entry *entry = m->private; 5226fd80729SMaíra Canal struct drm_device *dev = entry->dev; 523e896c132SNoralf Trønnes struct drm_printer p = drm_seq_file_printer(m); 524e896c132SNoralf Trønnes struct drm_client_dev *client; 525e896c132SNoralf Trønnes 526e896c132SNoralf Trønnes mutex_lock(&dev->clientlist_mutex); 527e896c132SNoralf Trønnes list_for_each_entry(client, &dev->clientlist, list) 528e896c132SNoralf Trønnes drm_printf(&p, "%s\n", client->name); 529e896c132SNoralf Trønnes mutex_unlock(&dev->clientlist_mutex); 530e896c132SNoralf Trønnes 531e896c132SNoralf Trønnes return 0; 532e896c132SNoralf Trønnes } 533e896c132SNoralf Trønnes 5346fd80729SMaíra Canal static const struct drm_debugfs_info drm_client_debugfs_list[] = { 535e896c132SNoralf Trønnes { "internal_clients", drm_client_debugfs_internal_clients, 0 }, 536e896c132SNoralf Trønnes }; 537e896c132SNoralf Trønnes 538*0b30d57aSChristian König void drm_client_debugfs_init(struct drm_device *dev) 539e896c132SNoralf Trønnes { 540*0b30d57aSChristian König drm_debugfs_add_files(dev, drm_client_debugfs_list, 5416fd80729SMaíra Canal ARRAY_SIZE(drm_client_debugfs_list)); 542e896c132SNoralf Trønnes } 543e896c132SNoralf Trønnes #endif 544