4 #include <linux/list.h>
5 #include <linux/kref.h>
6 #include <linux/mutex.h>
9 #include <drm/drm_hashtab.h>
10 #include <drm/drm_mode_config.h>
15 struct drm_device_dma;
16 struct drm_vblank_crtc;
19 struct drm_vma_offset_manager;
26 struct pci_controller;
30 * enum drm_switch_power - power state of drm device
33 enum switch_power_state {
34 /** @DRM_SWITCH_POWER_ON: Power state is ON */
35 DRM_SWITCH_POWER_ON = 0,
37 /** @DRM_SWITCH_POWER_OFF: Power state is OFF */
38 DRM_SWITCH_POWER_OFF = 1,
40 /** @DRM_SWITCH_POWER_CHANGING: Power state is changing */
41 DRM_SWITCH_POWER_CHANGING = 2,
43 /** @DRM_SWITCH_POWER_DYNAMIC_OFF: Suspended */
44 DRM_SWITCH_POWER_DYNAMIC_OFF = 3,
48 * struct drm_device - DRM device structure
50 * This structure represent a complete card that
51 * may contain multiple heads.
57 * List of devices per driver for stealth attach cleanup
59 struct list_head legacy_dev_list;
61 /** @if_version: Highest interface version set */
64 /** @ref: Object ref-count */
67 /** @dev: Device structure of bus-device */
73 * Managed resources linked to the lifetime of this &drm_device as
77 /** @managed.resources: managed resources list */
78 struct list_head resources;
79 /** @managed.final_kfree: pointer for final kfree() call */
81 /** @managed.lock: protects @managed.resources */
85 /** @driver: DRM driver managing the device */
86 struct drm_driver *driver;
91 * DRM driver private data. Instead of using this pointer it is
92 * recommended that drivers use drm_dev_init() and embed struct
93 * &drm_device in their larger per-device structure.
97 /** @primary: Primary node */
98 struct drm_minor *primary;
100 /** @render: Render node */
101 struct drm_minor *render;
106 * Internally used by drm_dev_register() and drm_connector_register().
113 * Currently active master for this device.
114 * Protected by &master_mutex
116 struct drm_master *master;
119 * @driver_features: per-device driver features
121 * Drivers can clear specific flags here to disallow
122 * certain features on a per-device basis while still
123 * sharing a single &struct drm_driver instance across
131 * Flag to tell if the device has been unplugged.
132 * See drm_dev_enter() and drm_dev_is_unplugged().
136 /** @anon_inode: inode for private address-space */
137 struct inode *anon_inode;
139 /** @unique: Unique name of the device */
145 * Lock for others (not &drm_minor.master and &drm_file.is_master)
147 struct mutex struct_mutex;
152 * Lock for &drm_minor.master and &drm_file.is_master
154 struct mutex master_mutex;
159 * Usage counter for outstanding files open,
160 * protected by drm_global_mutex
164 /** @filelist_mutex: Protects @filelist. */
165 struct mutex filelist_mutex;
169 * List of userspace clients, linked through &drm_file.lhead.
171 struct list_head filelist;
174 * @filelist_internal:
176 * List of open DRM files for in-kernel clients.
177 * Protected by &filelist_mutex.
179 struct list_head filelist_internal;
184 * Protects &clientlist access.
186 struct mutex clientlist_mutex;
191 * List of in-kernel clients. Protected by &clientlist_mutex.
193 struct list_head clientlist;
198 * Indicates that interrupt handling is enabled, specifically vblank
199 * handling. Drivers which don't use drm_irq_install() need to set this
205 * @irq: Used by the drm_irq_install() and drm_irq_unistall() helpers.
210 * @vblank_disable_immediate:
212 * If true, vblank interrupt will be disabled immediately when the
213 * refcount drops to zero, as opposed to via the vblank disable
216 * This can be set to true it the hardware has a working vblank counter
217 * with high-precision timestamping (otherwise there are races) and the
218 * driver uses drm_crtc_vblank_on() and drm_crtc_vblank_off()
219 * appropriately. See also @max_vblank_count and
220 * &drm_crtc_funcs.get_vblank_counter.
222 bool vblank_disable_immediate;
227 * Array of vblank tracking structures, one per &struct drm_crtc. For
228 * historical reasons (vblank support predates kernel modesetting) this
229 * is free-standing and not part of &struct drm_crtc itself. It must be
230 * initialized explicitly by calling drm_vblank_init().
232 struct drm_vblank_crtc *vblank;
237 * Protects vblank count and time updates during vblank enable/disable
239 spinlock_t vblank_time_lock;
241 * @vbl_lock: Top-level vblank references lock, wraps the low-level
249 * Maximum value of the vblank registers. This value +1 will result in a
250 * wrap-around of the vblank register. It is used by the vblank core to
251 * handle wrap-arounds.
253 * If set to zero the vblank core will try to guess the elapsed vblanks
254 * between times when the vblank interrupt is disabled through
255 * high-precision timestamps. That approach is suffering from small
256 * races and imprecision over longer time periods, hence exposing a
257 * hardware vblank counter is always recommended.
259 * This is the statically configured device wide maximum. The driver
260 * can instead choose to use a runtime configurable per-crtc value
261 * &drm_vblank_crtc.max_vblank_count, in which case @max_vblank_count
262 * must be left at zero. See drm_crtc_set_max_vblank_count() on how
263 * to use the per-crtc value.
265 * If non-zero, &drm_crtc_funcs.get_vblank_counter must be set.
267 u32 max_vblank_count;
269 /** @vblank_event_list: List of vblank events */
270 struct list_head vblank_event_list;
275 * Protects @vblank_event_list and event delivery in
276 * general. See drm_send_event() and drm_send_event_locked().
278 spinlock_t event_lock;
280 /** @agp: AGP data */
281 struct drm_agp_head *agp;
283 /** @pdev: PCI device structure */
284 struct pci_dev *pdev;
287 /** @hose: PCI hose, only used on ALPHA platforms. */
288 struct pci_controller *hose;
290 /** @num_crtcs: Number of CRTCs on this device */
291 unsigned int num_crtcs;
293 /** @mode_config: Current mode config */
294 struct drm_mode_config mode_config;
296 /** @object_name_lock: GEM information */
297 struct mutex object_name_lock;
299 /** @object_name_idr: GEM information */
300 struct idr object_name_idr;
302 /** @vma_offset_manager: GEM information */
303 struct drm_vma_offset_manager *vma_offset_manager;
305 /** @vram_mm: VRAM MM memory manager */
306 struct drm_vram_mm *vram_mm;
309 * @switch_power_state:
311 * Power state of the client.
312 * Used by drivers supporting the switcheroo driver.
313 * The state is maintained in the
314 * &vga_switcheroo_client_ops.set_gpu_state callback
316 enum switch_power_state switch_power_state;
321 * Pointer to the fbdev emulation structure.
322 * Set by drm_fb_helper_init() and cleared by drm_fb_helper_fini().
324 struct drm_fb_helper *fb_helper;
326 /* Everything below here is for legacy driver, never use! */
328 #if IS_ENABLED(CONFIG_DRM_LEGACY)
329 /* Context handle management - linked list of context handles */
330 struct list_head ctxlist;
332 /* Context handle management - mutex for &ctxlist */
333 struct mutex ctxlist_mutex;
335 /* Context handle management */
338 /* Memory management - linked list of regions */
339 struct list_head maplist;
341 /* Memory management - user token hash table for maps */
342 struct drm_open_hash map_hash;
344 /* Context handle management - list of vmas (for debugging) */
345 struct list_head vmalist;
347 /* Optional pointer for DMA support */
348 struct drm_device_dma *dma;
350 /* Context swapping flag */
351 __volatile__ long context_flag;
353 /* Last current context */
356 /* Lock for &buf_use and a few other things. */
359 /* Usage counter for buffers in use -- cannot alloc */
362 /* Buffer allocation in progress */
367 struct drm_hw_lock *lock;
370 struct drm_local_map *agp_buffer_map;
371 unsigned int agp_buffer_token;
373 /* Scatter gather memory */
374 struct drm_sg_mem *sg;