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TOMOYO Linux Cross Reference
Linux/include/drm/drm_device.h

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

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