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