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