1 #ifndef _DRM_DEVICE_H_ 2 #define _DRM_DEVICE_H_ 3 4 #include <linux/list.h> 5 #include <linux/kref.h> 6 #include <linux/mutex.h> 7 #include <linux/idr.h> 8 9 #include <drm/drm_hashtab.h> 10 #include <drm/drm_mode_config.h> 11 12 struct drm_driver; 13 struct drm_minor; 14 struct drm_master; 15 struct drm_device_dma; 16 struct drm_vblank_crtc; 17 struct drm_sg_mem; 18 struct drm_local_map; 19 struct drm_vma_offset_manager; 20 struct drm_vram_mm; 21 struct drm_fb_helper; 22 23 struct inode; 24 25 struct pci_dev; 26 struct pci_controller; 27 28 29 /** 30 * enum switch_power_state - power state of drm device 31 */ 32 33 enum switch_power_state { 34 /** @DRM_SWITCH_POWER_ON: Power state is ON */ 35 DRM_SWITCH_POWER_ON = 0, 36 37 /** @DRM_SWITCH_POWER_OFF: Power state is OFF */ 38 DRM_SWITCH_POWER_OFF = 1, 39 40 /** @DRM_SWITCH_POWER_CHANGING: Power state is changing */ 41 DRM_SWITCH_POWER_CHANGING = 2, 42 43 /** @DRM_SWITCH_POWER_DYNAMIC_OFF: Suspended */ 44 DRM_SWITCH_POWER_DYNAMIC_OFF = 3, 45 }; 46 47 /** 48 * struct drm_device - DRM device structure 49 * 50 * This structure represent a complete card that 51 * may contain multiple heads. 52 */ 53 struct drm_device { 54 /** @if_version: Highest interface version set */ 55 int if_version; 56 57 /** @ref: Object ref-count */ 58 struct kref ref; 59 60 /** @dev: Device structure of bus-device */ 61 struct device *dev; 62 63 /** 64 * @managed: 65 * 66 * Managed resources linked to the lifetime of this &drm_device as 67 * tracked by @ref. 68 */ 69 struct { 70 /** @managed.resources: managed resources list */ 71 struct list_head resources; 72 /** @managed.final_kfree: pointer for final kfree() call */ 73 void *final_kfree; 74 /** @managed.lock: protects @managed.resources */ 75 spinlock_t lock; 76 } managed; 77 78 /** @driver: DRM driver managing the device */ 79 const struct drm_driver *driver; 80 81 /** 82 * @dev_private: 83 * 84 * DRM driver private data. This is deprecated and should be left set to 85 * NULL. 86 * 87 * Instead of using this pointer it is recommended that drivers use 88 * devm_drm_dev_alloc() and embed struct &drm_device in their larger 89 * per-device structure. 90 */ 91 void *dev_private; 92 93 /** @primary: Primary node */ 94 struct drm_minor *primary; 95 96 /** @render: Render node */ 97 struct drm_minor *render; 98 99 /** 100 * @registered: 101 * 102 * Internally used by drm_dev_register() and drm_connector_register(). 103 */ 104 bool registered; 105 106 /** 107 * @master: 108 * 109 * Currently active master for this device. 110 * Protected by &master_mutex 111 */ 112 struct drm_master *master; 113 114 /** 115 * @driver_features: per-device driver features 116 * 117 * Drivers can clear specific flags here to disallow 118 * certain features on a per-device basis while still 119 * sharing a single &struct drm_driver instance across 120 * all devices. 121 */ 122 u32 driver_features; 123 124 /** 125 * @unplugged: 126 * 127 * Flag to tell if the device has been unplugged. 128 * See drm_dev_enter() and drm_dev_is_unplugged(). 129 */ 130 bool unplugged; 131 132 /** @anon_inode: inode for private address-space */ 133 struct inode *anon_inode; 134 135 /** @unique: Unique name of the device */ 136 char *unique; 137 138 /** 139 * @struct_mutex: 140 * 141 * Lock for others (not &drm_minor.master and &drm_file.is_master) 142 * 143 * WARNING: 144 * Only drivers annotated with DRIVER_LEGACY should be using this. 145 */ 146 struct mutex struct_mutex; 147 148 /** 149 * @master_mutex: 150 * 151 * Lock for &drm_minor.master and &drm_file.is_master 152 */ 153 struct mutex master_mutex; 154 155 /** 156 * @open_count: 157 * 158 * Usage counter for outstanding files open, 159 * protected by drm_global_mutex 160 */ 161 atomic_t open_count; 162 163 /** @filelist_mutex: Protects @filelist. */ 164 struct mutex filelist_mutex; 165 /** 166 * @filelist: 167 * 168 * List of userspace clients, linked through &drm_file.lhead. 169 */ 170 struct list_head filelist; 171 172 /** 173 * @filelist_internal: 174 * 175 * List of open DRM files for in-kernel clients. 176 * Protected by &filelist_mutex. 177 */ 178 struct list_head filelist_internal; 179 180 /** 181 * @clientlist_mutex: 182 * 183 * Protects &clientlist access. 184 */ 185 struct mutex clientlist_mutex; 186 187 /** 188 * @clientlist: 189 * 190 * List of in-kernel clients. Protected by &clientlist_mutex. 191 */ 192 struct list_head clientlist; 193 194 /** 195 * @irq_enabled: 196 * 197 * Indicates that interrupt handling is enabled, specifically vblank 198 * handling. Drivers which don't use drm_irq_install() need to set this 199 * to true manually. 200 */ 201 bool irq_enabled; 202 203 /** 204 * @irq: Used by the drm_irq_install() and drm_irq_unistall() helpers. 205 */ 206 int irq; 207 208 /** 209 * @vblank_disable_immediate: 210 * 211 * If true, vblank interrupt will be disabled immediately when the 212 * refcount drops to zero, as opposed to via the vblank disable 213 * timer. 214 * 215 * This can be set to true it the hardware has a working vblank counter 216 * with high-precision timestamping (otherwise there are races) and the 217 * driver uses drm_crtc_vblank_on() and drm_crtc_vblank_off() 218 * appropriately. See also @max_vblank_count and 219 * &drm_crtc_funcs.get_vblank_counter. 220 */ 221 bool vblank_disable_immediate; 222 223 /** 224 * @vblank: 225 * 226 * Array of vblank tracking structures, one per &struct drm_crtc. For 227 * historical reasons (vblank support predates kernel modesetting) this 228 * is free-standing and not part of &struct drm_crtc itself. It must be 229 * initialized explicitly by calling drm_vblank_init(). 230 */ 231 struct drm_vblank_crtc *vblank; 232 233 /** 234 * @vblank_time_lock: 235 * 236 * Protects vblank count and time updates during vblank enable/disable 237 */ 238 spinlock_t vblank_time_lock; 239 /** 240 * @vbl_lock: Top-level vblank references lock, wraps the low-level 241 * @vblank_time_lock. 242 */ 243 spinlock_t vbl_lock; 244 245 /** 246 * @max_vblank_count: 247 * 248 * Maximum value of the vblank registers. This value +1 will result in a 249 * wrap-around of the vblank register. It is used by the vblank core to 250 * handle wrap-arounds. 251 * 252 * If set to zero the vblank core will try to guess the elapsed vblanks 253 * between times when the vblank interrupt is disabled through 254 * high-precision timestamps. That approach is suffering from small 255 * races and imprecision over longer time periods, hence exposing a 256 * hardware vblank counter is always recommended. 257 * 258 * This is the statically configured device wide maximum. The driver 259 * can instead choose to use a runtime configurable per-crtc value 260 * &drm_vblank_crtc.max_vblank_count, in which case @max_vblank_count 261 * must be left at zero. See drm_crtc_set_max_vblank_count() on how 262 * to use the per-crtc value. 263 * 264 * If non-zero, &drm_crtc_funcs.get_vblank_counter must be set. 265 */ 266 u32 max_vblank_count; 267 268 /** @vblank_event_list: List of vblank events */ 269 struct list_head vblank_event_list; 270 271 /** 272 * @event_lock: 273 * 274 * Protects @vblank_event_list and event delivery in 275 * general. See drm_send_event() and drm_send_event_locked(). 276 */ 277 spinlock_t event_lock; 278 279 /** @num_crtcs: Number of CRTCs on this device */ 280 unsigned int num_crtcs; 281 282 /** @mode_config: Current mode config */ 283 struct drm_mode_config mode_config; 284 285 /** @object_name_lock: GEM information */ 286 struct mutex object_name_lock; 287 288 /** @object_name_idr: GEM information */ 289 struct idr object_name_idr; 290 291 /** @vma_offset_manager: GEM information */ 292 struct drm_vma_offset_manager *vma_offset_manager; 293 294 /** @vram_mm: VRAM MM memory manager */ 295 struct drm_vram_mm *vram_mm; 296 297 /** 298 * @switch_power_state: 299 * 300 * Power state of the client. 301 * Used by drivers supporting the switcheroo driver. 302 * The state is maintained in the 303 * &vga_switcheroo_client_ops.set_gpu_state callback 304 */ 305 enum switch_power_state switch_power_state; 306 307 /** 308 * @fb_helper: 309 * 310 * Pointer to the fbdev emulation structure. 311 * Set by drm_fb_helper_init() and cleared by drm_fb_helper_fini(). 312 */ 313 struct drm_fb_helper *fb_helper; 314 315 /* Everything below here is for legacy driver, never use! */ 316 /* private: */ 317 #if IS_ENABLED(CONFIG_DRM_LEGACY) 318 /* List of devices per driver for stealth attach cleanup */ 319 struct list_head legacy_dev_list; 320 321 #ifdef __alpha__ 322 /** @hose: PCI hose, only used on ALPHA platforms. */ 323 struct pci_controller *hose; 324 #endif 325 326 /* AGP data */ 327 struct drm_agp_head *agp; 328 329 /* Context handle management - linked list of context handles */ 330 struct list_head ctxlist; 331 332 /* Context handle management - mutex for &ctxlist */ 333 struct mutex ctxlist_mutex; 334 335 /* Context handle management */ 336 struct idr ctx_idr; 337 338 /* Memory management - linked list of regions */ 339 struct list_head maplist; 340 341 /* Memory management - user token hash table for maps */ 342 struct drm_open_hash map_hash; 343 344 /* Context handle management - list of vmas (for debugging) */ 345 struct list_head vmalist; 346 347 /* Optional pointer for DMA support */ 348 struct drm_device_dma *dma; 349 350 /* Context swapping flag */ 351 __volatile__ long context_flag; 352 353 /* Last current context */ 354 int last_context; 355 356 /* Lock for &buf_use and a few other things. */ 357 spinlock_t buf_lock; 358 359 /* Usage counter for buffers in use -- cannot alloc */ 360 int buf_use; 361 362 /* Buffer allocation in progress */ 363 atomic_t buf_alloc; 364 365 struct { 366 int context; 367 struct drm_hw_lock *lock; 368 } sigdata; 369 370 struct drm_local_map *agp_buffer_map; 371 unsigned int agp_buffer_token; 372 373 /* Scatter gather memory */ 374 struct drm_sg_mem *sg; 375 #endif 376 }; 377 378 #endif 379