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 drm_switch_power - 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 /** 55 * @legacy_dev_list: 56 * 57 * List of devices per driver for stealth attach cleanup 58 */ 59 struct list_head legacy_dev_list; 60 61 /** @if_version: Highest interface version set */ 62 int if_version; 63 64 /** @ref: Object ref-count */ 65 struct kref ref; 66 67 /** @dev: Device structure of bus-device */ 68 struct device *dev; 69 70 /** 71 * @managed: 72 * 73 * Managed resources linked to the lifetime of this &drm_device as 74 * tracked by @ref. 75 */ 76 struct { 77 /** @managed.resources: managed resources list */ 78 struct list_head resources; 79 /** @managed.final_kfree: pointer for final kfree() call */ 80 void *final_kfree; 81 /** @managed.lock: protects @managed.resources */ 82 spinlock_t lock; 83 } managed; 84 85 /** @driver: DRM driver managing the device */ 86 #ifdef CONFIG_DRM_LEGACY 87 struct drm_driver *driver; 88 #else 89 const struct drm_driver *driver; 90 #endif 91 92 /** 93 * @dev_private: 94 * 95 * DRM driver private data. This is deprecated and should be left set to 96 * NULL. 97 * 98 * Instead of using this pointer it is recommended that drivers use 99 * devm_drm_dev_alloc() and embed struct &drm_device in their larger 100 * per-device structure. 101 */ 102 void *dev_private; 103 104 /** @primary: Primary node */ 105 struct drm_minor *primary; 106 107 /** @render: Render node */ 108 struct drm_minor *render; 109 110 /** 111 * @registered: 112 * 113 * Internally used by drm_dev_register() and drm_connector_register(). 114 */ 115 bool registered; 116 117 /** 118 * @master: 119 * 120 * Currently active master for this device. 121 * Protected by &master_mutex 122 */ 123 struct drm_master *master; 124 125 /** 126 * @driver_features: per-device driver features 127 * 128 * Drivers can clear specific flags here to disallow 129 * certain features on a per-device basis while still 130 * sharing a single &struct drm_driver instance across 131 * all devices. 132 */ 133 u32 driver_features; 134 135 /** 136 * @unplugged: 137 * 138 * Flag to tell if the device has been unplugged. 139 * See drm_dev_enter() and drm_dev_is_unplugged(). 140 */ 141 bool unplugged; 142 143 /** @anon_inode: inode for private address-space */ 144 struct inode *anon_inode; 145 146 /** @unique: Unique name of the device */ 147 char *unique; 148 149 /** 150 * @struct_mutex: 151 * 152 * Lock for others (not &drm_minor.master and &drm_file.is_master) 153 * 154 * WARNING: 155 * Only drivers annotated with DRIVER_LEGACY should be using this. 156 */ 157 struct mutex struct_mutex; 158 159 /** 160 * @master_mutex: 161 * 162 * Lock for &drm_minor.master and &drm_file.is_master 163 */ 164 struct mutex master_mutex; 165 166 /** 167 * @open_count: 168 * 169 * Usage counter for outstanding files open, 170 * protected by drm_global_mutex 171 */ 172 atomic_t open_count; 173 174 /** @filelist_mutex: Protects @filelist. */ 175 struct mutex filelist_mutex; 176 /** 177 * @filelist: 178 * 179 * List of userspace clients, linked through &drm_file.lhead. 180 */ 181 struct list_head filelist; 182 183 /** 184 * @filelist_internal: 185 * 186 * List of open DRM files for in-kernel clients. 187 * Protected by &filelist_mutex. 188 */ 189 struct list_head filelist_internal; 190 191 /** 192 * @clientlist_mutex: 193 * 194 * Protects &clientlist access. 195 */ 196 struct mutex clientlist_mutex; 197 198 /** 199 * @clientlist: 200 * 201 * List of in-kernel clients. Protected by &clientlist_mutex. 202 */ 203 struct list_head clientlist; 204 205 /** 206 * @irq_enabled: 207 * 208 * Indicates that interrupt handling is enabled, specifically vblank 209 * handling. Drivers which don't use drm_irq_install() need to set this 210 * to true manually. 211 */ 212 bool irq_enabled; 213 214 /** 215 * @irq: Used by the drm_irq_install() and drm_irq_unistall() helpers. 216 */ 217 int irq; 218 219 /** 220 * @vblank_disable_immediate: 221 * 222 * If true, vblank interrupt will be disabled immediately when the 223 * refcount drops to zero, as opposed to via the vblank disable 224 * timer. 225 * 226 * This can be set to true it the hardware has a working vblank counter 227 * with high-precision timestamping (otherwise there are races) and the 228 * driver uses drm_crtc_vblank_on() and drm_crtc_vblank_off() 229 * appropriately. See also @max_vblank_count and 230 * &drm_crtc_funcs.get_vblank_counter. 231 */ 232 bool vblank_disable_immediate; 233 234 /** 235 * @vblank: 236 * 237 * Array of vblank tracking structures, one per &struct drm_crtc. For 238 * historical reasons (vblank support predates kernel modesetting) this 239 * is free-standing and not part of &struct drm_crtc itself. It must be 240 * initialized explicitly by calling drm_vblank_init(). 241 */ 242 struct drm_vblank_crtc *vblank; 243 244 /** 245 * @vblank_time_lock: 246 * 247 * Protects vblank count and time updates during vblank enable/disable 248 */ 249 spinlock_t vblank_time_lock; 250 /** 251 * @vbl_lock: Top-level vblank references lock, wraps the low-level 252 * @vblank_time_lock. 253 */ 254 spinlock_t vbl_lock; 255 256 /** 257 * @max_vblank_count: 258 * 259 * Maximum value of the vblank registers. This value +1 will result in a 260 * wrap-around of the vblank register. It is used by the vblank core to 261 * handle wrap-arounds. 262 * 263 * If set to zero the vblank core will try to guess the elapsed vblanks 264 * between times when the vblank interrupt is disabled through 265 * high-precision timestamps. That approach is suffering from small 266 * races and imprecision over longer time periods, hence exposing a 267 * hardware vblank counter is always recommended. 268 * 269 * This is the statically configured device wide maximum. The driver 270 * can instead choose to use a runtime configurable per-crtc value 271 * &drm_vblank_crtc.max_vblank_count, in which case @max_vblank_count 272 * must be left at zero. See drm_crtc_set_max_vblank_count() on how 273 * to use the per-crtc value. 274 * 275 * If non-zero, &drm_crtc_funcs.get_vblank_counter must be set. 276 */ 277 u32 max_vblank_count; 278 279 /** @vblank_event_list: List of vblank events */ 280 struct list_head vblank_event_list; 281 282 /** 283 * @event_lock: 284 * 285 * Protects @vblank_event_list and event delivery in 286 * general. See drm_send_event() and drm_send_event_locked(). 287 */ 288 spinlock_t event_lock; 289 290 /** @agp: AGP data */ 291 struct drm_agp_head *agp; 292 293 /** @pdev: PCI device structure */ 294 struct pci_dev *pdev; 295 296 #ifdef __alpha__ 297 /** @hose: PCI hose, only used on ALPHA platforms. */ 298 struct pci_controller *hose; 299 #endif 300 /** @num_crtcs: Number of CRTCs on this device */ 301 unsigned int num_crtcs; 302 303 /** @mode_config: Current mode config */ 304 struct drm_mode_config mode_config; 305 306 /** @object_name_lock: GEM information */ 307 struct mutex object_name_lock; 308 309 /** @object_name_idr: GEM information */ 310 struct idr object_name_idr; 311 312 /** @vma_offset_manager: GEM information */ 313 struct drm_vma_offset_manager *vma_offset_manager; 314 315 /** @vram_mm: VRAM MM memory manager */ 316 struct drm_vram_mm *vram_mm; 317 318 /** 319 * @switch_power_state: 320 * 321 * Power state of the client. 322 * Used by drivers supporting the switcheroo driver. 323 * The state is maintained in the 324 * &vga_switcheroo_client_ops.set_gpu_state callback 325 */ 326 enum switch_power_state switch_power_state; 327 328 /** 329 * @fb_helper: 330 * 331 * Pointer to the fbdev emulation structure. 332 * Set by drm_fb_helper_init() and cleared by drm_fb_helper_fini(). 333 */ 334 struct drm_fb_helper *fb_helper; 335 336 /* Everything below here is for legacy driver, never use! */ 337 /* private: */ 338 #if IS_ENABLED(CONFIG_DRM_LEGACY) 339 /* Context handle management - linked list of context handles */ 340 struct list_head ctxlist; 341 342 /* Context handle management - mutex for &ctxlist */ 343 struct mutex ctxlist_mutex; 344 345 /* Context handle management */ 346 struct idr ctx_idr; 347 348 /* Memory management - linked list of regions */ 349 struct list_head maplist; 350 351 /* Memory management - user token hash table for maps */ 352 struct drm_open_hash map_hash; 353 354 /* Context handle management - list of vmas (for debugging) */ 355 struct list_head vmalist; 356 357 /* Optional pointer for DMA support */ 358 struct drm_device_dma *dma; 359 360 /* Context swapping flag */ 361 __volatile__ long context_flag; 362 363 /* Last current context */ 364 int last_context; 365 366 /* Lock for &buf_use and a few other things. */ 367 spinlock_t buf_lock; 368 369 /* Usage counter for buffers in use -- cannot alloc */ 370 int buf_use; 371 372 /* Buffer allocation in progress */ 373 atomic_t buf_alloc; 374 375 struct { 376 int context; 377 struct drm_hw_lock *lock; 378 } sigdata; 379 380 struct drm_local_map *agp_buffer_map; 381 unsigned int agp_buffer_token; 382 383 /* Scatter gather memory */ 384 struct drm_sg_mem *sg; 385 #endif 386 }; 387 388 #endif 389