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85e634bc DV |
1 | /* |
2 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. | |
3 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
4 | * Copyright (c) 2009-2010, Code Aurora Forum. | |
5 | * Copyright 2016 Intel Corp. | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a | |
8 | * copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation | |
10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
11 | * and/or sell copies of the Software, and to permit persons to whom the | |
12 | * Software is furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the next | |
15 | * paragraph) shall be included in all copies or substantial portions of the | |
16 | * Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
21 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
22 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
23 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
24 | * OTHER DEALINGS IN THE SOFTWARE. | |
25 | */ | |
26 | ||
27 | #ifndef _DRM_DRV_H_ | |
28 | #define _DRM_DRV_H_ | |
29 | ||
30 | #include <linux/list.h> | |
31 | #include <linux/irqreturn.h> | |
32 | ||
9a758d87 TZ |
33 | #include <video/nomodeset.h> |
34 | ||
c07dcd61 DV |
35 | #include <drm/drm_device.h> |
36 | ||
85e634bc DV |
37 | struct drm_file; |
38 | struct drm_gem_object; | |
39 | struct drm_master; | |
40 | struct drm_minor; | |
d693def4 | 41 | struct dma_buf; |
85e634bc DV |
42 | struct dma_buf_attachment; |
43 | struct drm_display_mode; | |
44 | struct drm_mode_create_dumb; | |
45d58b40 | 45 | struct drm_printer; |
d693def4 | 46 | struct sg_table; |
85e634bc | 47 | |
0e2a933b DV |
48 | /** |
49 | * enum drm_driver_feature - feature flags | |
50 | * | |
51 | * See &drm_driver.driver_features, drm_device.driver_features and | |
52 | * drm_core_check_feature(). | |
53 | */ | |
54 | enum drm_driver_feature { | |
55 | /** | |
56 | * @DRIVER_GEM: | |
57 | * | |
58 | * Driver use the GEM memory manager. This should be set for all modern | |
59 | * drivers. | |
60 | */ | |
61 | DRIVER_GEM = BIT(0), | |
62 | /** | |
63 | * @DRIVER_MODESET: | |
64 | * | |
65 | * Driver supports mode setting interfaces (KMS). | |
66 | */ | |
67 | DRIVER_MODESET = BIT(1), | |
0e2a933b DV |
68 | /** |
69 | * @DRIVER_RENDER: | |
70 | * | |
71 | * Driver supports dedicated render nodes. See also the :ref:`section on | |
72 | * render nodes <drm_render_node>` for details. | |
73 | */ | |
74 | DRIVER_RENDER = BIT(3), | |
75 | /** | |
76 | * @DRIVER_ATOMIC: | |
77 | * | |
78 | * Driver supports the full atomic modesetting userspace API. Drivers | |
ee84c58b | 79 | * which only use atomic internally, but do not support the full |
0e2a933b DV |
80 | * userspace API (e.g. not all properties converted to atomic, or |
81 | * multi-plane updates are not guaranteed to be tear-free) should not | |
82 | * set this flag. | |
83 | */ | |
84 | DRIVER_ATOMIC = BIT(4), | |
85 | /** | |
86 | * @DRIVER_SYNCOBJ: | |
87 | * | |
88 | * Driver supports &drm_syncobj for explicit synchronization of command | |
89 | * submission. | |
90 | */ | |
91 | DRIVER_SYNCOBJ = BIT(5), | |
060cebb2 LL |
92 | /** |
93 | * @DRIVER_SYNCOBJ_TIMELINE: | |
94 | * | |
95 | * Driver supports the timeline flavor of &drm_syncobj for explicit | |
96 | * synchronization of command submission. | |
97 | */ | |
98 | DRIVER_SYNCOBJ_TIMELINE = BIT(6), | |
2c204f3d OG |
99 | /** |
100 | * @DRIVER_COMPUTE_ACCEL: | |
101 | * | |
102 | * Driver supports compute acceleration devices. This flag is mutually exclusive with | |
103 | * @DRIVER_RENDER and @DRIVER_MODESET. Devices that support both graphics and compute | |
104 | * acceleration should be handled by two drivers that are connected using auxiliary bus. | |
105 | */ | |
106 | DRIVER_COMPUTE_ACCEL = BIT(7), | |
0e2a933b DV |
107 | |
108 | /* IMPORTANT: Below are all the legacy flags, add new ones above. */ | |
109 | ||
110 | /** | |
111 | * @DRIVER_USE_AGP: | |
112 | * | |
113 | * Set up DRM AGP support, see drm_agp_init(), the DRM core will manage | |
114 | * AGP resources. New drivers don't need this. | |
115 | */ | |
1ff49481 | 116 | DRIVER_USE_AGP = BIT(25), |
0e2a933b DV |
117 | /** |
118 | * @DRIVER_LEGACY: | |
119 | * | |
120 | * Denote a legacy driver using shadow attach. Do not use. | |
121 | */ | |
1ff49481 | 122 | DRIVER_LEGACY = BIT(26), |
0e2a933b DV |
123 | /** |
124 | * @DRIVER_PCI_DMA: | |
125 | * | |
126 | * Driver is capable of PCI DMA, mapping of PCI DMA buffers to userspace | |
127 | * will be enabled. Only for legacy drivers. Do not use. | |
128 | */ | |
1ff49481 | 129 | DRIVER_PCI_DMA = BIT(27), |
0e2a933b DV |
130 | /** |
131 | * @DRIVER_SG: | |
132 | * | |
133 | * Driver can perform scatter/gather DMA, allocation and mapping of | |
134 | * scatter/gather buffers will be enabled. Only for legacy drivers. Do | |
135 | * not use. | |
136 | */ | |
1ff49481 | 137 | DRIVER_SG = BIT(28), |
0e2a933b DV |
138 | |
139 | /** | |
140 | * @DRIVER_HAVE_DMA: | |
141 | * | |
142 | * Driver supports DMA, the userspace DMA API will be supported. Only | |
143 | * for legacy drivers. Do not use. | |
144 | */ | |
1ff49481 | 145 | DRIVER_HAVE_DMA = BIT(29), |
0e2a933b DV |
146 | /** |
147 | * @DRIVER_HAVE_IRQ: | |
148 | * | |
149 | * Legacy irq support. Only for legacy drivers. Do not use. | |
0e2a933b | 150 | */ |
1ff49481 | 151 | DRIVER_HAVE_IRQ = BIT(30), |
0e2a933b | 152 | }; |
85e634bc DV |
153 | |
154 | /** | |
155 | * struct drm_driver - DRM driver structure | |
156 | * | |
60e6ecfb LC |
157 | * This structure represent the common code for a family of cards. There will be |
158 | * one &struct drm_device for each card present in this family. It contains lots | |
159 | * of vfunc entries, and a pile of those probably should be moved to more | |
85e634bc DV |
160 | * appropriate places like &drm_mode_config_funcs or into a new operations |
161 | * structure for GEM drivers. | |
162 | */ | |
163 | struct drm_driver { | |
56926500 GKB |
164 | /** |
165 | * @load: | |
166 | * | |
4c8e84b8 DV |
167 | * Backward-compatible driver callback to complete initialization steps |
168 | * after the driver is registered. For this reason, may suffer from | |
169 | * race conditions and its use is deprecated for new drivers. It is | |
170 | * therefore only supported for existing drivers not yet converted to | |
171 | * the new scheme. See devm_drm_dev_alloc() and drm_dev_register() for | |
172 | * proper and race-free way to set up a &struct drm_device. | |
56926500 | 173 | * |
b93658f8 DV |
174 | * This is deprecated, do not use! |
175 | * | |
56926500 GKB |
176 | * Returns: |
177 | * | |
178 | * Zero on success, non-zero value on failure. | |
179 | */ | |
85e634bc | 180 | int (*load) (struct drm_device *, unsigned long flags); |
b93658f8 DV |
181 | |
182 | /** | |
183 | * @open: | |
184 | * | |
185 | * Driver callback when a new &struct drm_file is opened. Useful for | |
186 | * setting up driver-private data structures like buffer allocators, | |
187 | * execution contexts or similar things. Such driver-private resources | |
188 | * must be released again in @postclose. | |
189 | * | |
190 | * Since the display/modeset side of DRM can only be owned by exactly | |
191 | * one &struct drm_file (see &drm_file.is_master and &drm_device.master) | |
192 | * there should never be a need to set up any modeset related resources | |
193 | * in this callback. Doing so would be a driver design bug. | |
194 | * | |
195 | * Returns: | |
196 | * | |
197 | * 0 on success, a negative error code on failure, which will be | |
198 | * promoted to userspace as the result of the open() system call. | |
199 | */ | |
85e634bc | 200 | int (*open) (struct drm_device *, struct drm_file *); |
b93658f8 | 201 | |
b93658f8 DV |
202 | /** |
203 | * @postclose: | |
204 | * | |
205 | * One of the driver callbacks when a new &struct drm_file is closed. | |
206 | * Useful for tearing down driver-private data structures allocated in | |
207 | * @open like buffer allocators, execution contexts or similar things. | |
208 | * | |
209 | * Since the display/modeset side of DRM can only be owned by exactly | |
210 | * one &struct drm_file (see &drm_file.is_master and &drm_device.master) | |
211 | * there should never be a need to tear down any modeset related | |
212 | * resources in this callback. Doing so would be a driver design bug. | |
b93658f8 | 213 | */ |
85e634bc | 214 | void (*postclose) (struct drm_device *, struct drm_file *); |
b93658f8 DV |
215 | |
216 | /** | |
217 | * @lastclose: | |
218 | * | |
219 | * Called when the last &struct drm_file has been closed and there's | |
220 | * currently no userspace client for the &struct drm_device. | |
221 | * | |
222 | * Modern drivers should only use this to force-restore the fbdev | |
223 | * framebuffer using drm_fb_helper_restore_fbdev_mode_unlocked(). | |
224 | * Anything else would indicate there's something seriously wrong. | |
225 | * Modern drivers can also use this to execute delayed power switching | |
226 | * state changes, e.g. in conjunction with the :ref:`vga_switcheroo` | |
227 | * infrastructure. | |
228 | * | |
45c3d213 | 229 | * This is called after @postclose hook has been called. |
b93658f8 DV |
230 | * |
231 | * NOTE: | |
232 | * | |
233 | * All legacy drivers use this callback to de-initialize the hardware. | |
234 | * This is purely because of the shadow-attach model, where the DRM | |
235 | * kernel driver does not really own the hardware. Instead ownershipe is | |
236 | * handled with the help of userspace through an inheritedly racy dance | |
237 | * to set/unset the VT into raw mode. | |
238 | * | |
239 | * Legacy drivers initialize the hardware in the @firstopen callback, | |
240 | * which isn't even called for modern drivers. | |
241 | */ | |
85e634bc | 242 | void (*lastclose) (struct drm_device *); |
56926500 GKB |
243 | |
244 | /** | |
245 | * @unload: | |
246 | * | |
247 | * Reverse the effects of the driver load callback. Ideally, | |
248 | * the clean up performed by the driver should happen in the | |
249 | * reverse order of the initialization. Similarly to the load | |
250 | * hook, this handler is deprecated and its usage should be | |
251 | * dropped in favor of an open-coded teardown function at the | |
9a96f550 | 252 | * driver layer. See drm_dev_unregister() and drm_dev_put() |
56926500 GKB |
253 | * for the proper way to remove a &struct drm_device. |
254 | * | |
255 | * The unload() hook is called right after unregistering | |
256 | * the device. | |
257 | * | |
56926500 | 258 | */ |
11b3c20b | 259 | void (*unload) (struct drm_device *); |
f30c9257 CW |
260 | |
261 | /** | |
262 | * @release: | |
263 | * | |
264 | * Optional callback for destroying device data after the final | |
d33b58d0 | 265 | * reference is released, i.e. the device is being destroyed. |
9e1ed9fb DV |
266 | * |
267 | * This is deprecated, clean up all memory allocations associated with a | |
268 | * &drm_device using drmm_add_action(), drmm_kmalloc() and related | |
269 | * managed resources functions. | |
f30c9257 CW |
270 | */ |
271 | void (*release) (struct drm_device *); | |
272 | ||
6c4789ed DV |
273 | /** |
274 | * @master_set: | |
275 | * | |
276 | * Called whenever the minor master is set. Only used by vmwgfx. | |
277 | */ | |
907f5320 EV |
278 | void (*master_set)(struct drm_device *dev, struct drm_file *file_priv, |
279 | bool from_open); | |
6c4789ed DV |
280 | /** |
281 | * @master_drop: | |
282 | * | |
283 | * Called whenever the minor master is dropped. Only used by vmwgfx. | |
284 | */ | |
85e634bc DV |
285 | void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv); |
286 | ||
d1b6c62f SP |
287 | /** |
288 | * @debugfs_init: | |
289 | * | |
290 | * Allows drivers to create driver-specific debugfs files. | |
291 | */ | |
7ce84471 | 292 | void (*debugfs_init)(struct drm_minor *minor); |
85e634bc | 293 | |
85e634bc | 294 | /** |
218adc17 CW |
295 | * @gem_create_object: constructor for gem objects |
296 | * | |
4ff22f48 TZ |
297 | * Hook for allocating the GEM object struct, for use by the CMA |
298 | * and SHMEM GEM helpers. Returns a GEM object on success, or an | |
299 | * ERR_PTR()-encoded error code otherwise. | |
85e634bc DV |
300 | */ |
301 | struct drm_gem_object *(*gem_create_object)(struct drm_device *dev, | |
302 | size_t size); | |
d693def4 | 303 | |
d1b6c62f SP |
304 | /** |
305 | * @prime_handle_to_fd: | |
306 | * | |
805dc614 DV |
307 | * Main PRIME export function. Should be implemented with |
308 | * drm_gem_prime_handle_to_fd() for GEM based drivers. | |
309 | * | |
310 | * For an in-depth discussion see :ref:`PRIME buffer sharing | |
311 | * documentation <prime_buffer_sharing>`. | |
d1b6c62f | 312 | */ |
85e634bc DV |
313 | int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv, |
314 | uint32_t handle, uint32_t flags, int *prime_fd); | |
d1b6c62f SP |
315 | /** |
316 | * @prime_fd_to_handle: | |
317 | * | |
805dc614 DV |
318 | * Main PRIME import function. Should be implemented with |
319 | * drm_gem_prime_fd_to_handle() for GEM based drivers. | |
320 | * | |
321 | * For an in-depth discussion see :ref:`PRIME buffer sharing | |
322 | * documentation <prime_buffer_sharing>`. | |
d1b6c62f | 323 | */ |
85e634bc DV |
324 | int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv, |
325 | int prime_fd, uint32_t *handle); | |
d693def4 | 326 | |
d1b6c62f SP |
327 | /** |
328 | * @gem_prime_import: | |
329 | * | |
805dc614 | 330 | * Import hook for GEM drivers. |
f0014881 NT |
331 | * |
332 | * This defaults to drm_gem_prime_import() if not set. | |
d1b6c62f | 333 | */ |
85e634bc DV |
334 | struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev, |
335 | struct dma_buf *dma_buf); | |
805dc614 | 336 | /** |
805dc614 DV |
337 | * @gem_prime_import_sg_table: |
338 | * | |
339 | * Optional hook used by the PRIME helper functions | |
340 | * drm_gem_prime_import() respectively drm_gem_prime_import_dev(). | |
341 | */ | |
85e634bc DV |
342 | struct drm_gem_object *(*gem_prime_import_sg_table)( |
343 | struct drm_device *dev, | |
344 | struct dma_buf_attachment *attach, | |
345 | struct sg_table *sgt); | |
805dc614 DV |
346 | /** |
347 | * @gem_prime_mmap: | |
348 | * | |
349 | * mmap hook for GEM drivers, used to implement dma-buf mmap in the | |
350 | * PRIME helpers. | |
351 | * | |
396d9b9a TZ |
352 | * This hook only exists for historical reasons. Drivers must use |
353 | * drm_gem_prime_mmap() to implement it. | |
354 | * | |
355 | * FIXME: Convert all drivers to implement mmap in struct | |
356 | * &drm_gem_object_funcs and inline drm_gem_prime_mmap() into | |
357 | * its callers. This hook should be removed afterwards. | |
805dc614 | 358 | */ |
396d9b9a | 359 | int (*gem_prime_mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma); |
85e634bc | 360 | |
4f93624e DV |
361 | /** |
362 | * @dumb_create: | |
363 | * | |
364 | * This creates a new dumb buffer in the driver's backing storage manager (GEM, | |
365 | * TTM or something else entirely) and returns the resulting buffer handle. This | |
366 | * handle can then be wrapped up into a framebuffer modeset object. | |
367 | * | |
368 | * Note that userspace is not allowed to use such objects for render | |
369 | * acceleration - drivers must create their own private ioctls for such a use | |
370 | * case. | |
371 | * | |
372 | * Width, height and depth are specified in the &drm_mode_create_dumb | |
373 | * argument. The callback needs to fill the handle, pitch and size for | |
374 | * the created buffer. | |
375 | * | |
376 | * Called by the user via ioctl. | |
377 | * | |
378 | * Returns: | |
379 | * | |
380 | * Zero on success, negative errno on failure. | |
381 | */ | |
85e634bc DV |
382 | int (*dumb_create)(struct drm_file *file_priv, |
383 | struct drm_device *dev, | |
384 | struct drm_mode_create_dumb *args); | |
4f93624e DV |
385 | /** |
386 | * @dumb_map_offset: | |
387 | * | |
388 | * Allocate an offset in the drm device node's address space to be able to | |
39dea70d DV |
389 | * memory map a dumb buffer. |
390 | * | |
391 | * The default implementation is drm_gem_create_mmap_offset(). GEM based | |
392 | * drivers must not overwrite this. | |
4f93624e DV |
393 | * |
394 | * Called by the user via ioctl. | |
395 | * | |
396 | * Returns: | |
397 | * | |
398 | * Zero on success, negative errno on failure. | |
399 | */ | |
85e634bc DV |
400 | int (*dumb_map_offset)(struct drm_file *file_priv, |
401 | struct drm_device *dev, uint32_t handle, | |
402 | uint64_t *offset); | |
85e634bc | 403 | |
d1b6c62f | 404 | /** @major: driver major number */ |
85e634bc | 405 | int major; |
d1b6c62f | 406 | /** @minor: driver minor number */ |
85e634bc | 407 | int minor; |
d1b6c62f | 408 | /** @patchlevel: driver patch level */ |
85e634bc | 409 | int patchlevel; |
d1b6c62f | 410 | /** @name: driver name */ |
85e634bc | 411 | char *name; |
d1b6c62f | 412 | /** @desc: driver description */ |
85e634bc | 413 | char *desc; |
d1b6c62f | 414 | /** @date: driver date */ |
85e634bc DV |
415 | char *date; |
416 | ||
0e2a933b DV |
417 | /** |
418 | * @driver_features: | |
419 | * Driver features, see &enum drm_driver_feature. Drivers can disable | |
420 | * some features on a per-instance basis using | |
421 | * &drm_device.driver_features. | |
422 | */ | |
85e634bc | 423 | u32 driver_features; |
bb2eaba6 DV |
424 | |
425 | /** | |
426 | * @ioctls: | |
427 | * | |
428 | * Array of driver-private IOCTL description entries. See the chapter on | |
429 | * :ref:`IOCTL support in the userland interfaces | |
430 | * chapter<drm_driver_ioctl>` for the full details. | |
431 | */ | |
432 | ||
85e634bc | 433 | const struct drm_ioctl_desc *ioctls; |
bb2eaba6 | 434 | /** @num_ioctls: Number of entries in @ioctls. */ |
85e634bc | 435 | int num_ioctls; |
bb2eaba6 DV |
436 | |
437 | /** | |
438 | * @fops: | |
439 | * | |
440 | * File operations for the DRM device node. See the discussion in | |
441 | * :ref:`file operations<drm_driver_fops>` for in-depth coverage and | |
442 | * some examples. | |
443 | */ | |
85e634bc DV |
444 | const struct file_operations *fops; |
445 | ||
57bb1ee6 | 446 | #ifdef CONFIG_DRM_LEGACY |
0683c0ab DV |
447 | /* Everything below here is for legacy driver, never use! */ |
448 | /* private: */ | |
449 | ||
0683c0ab | 450 | int (*firstopen) (struct drm_device *); |
45c3d213 | 451 | void (*preclose) (struct drm_device *, struct drm_file *file_priv); |
0683c0ab DV |
452 | int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv); |
453 | int (*dma_quiescent) (struct drm_device *); | |
454 | int (*context_dtor) (struct drm_device *dev, int context); | |
c1736b90 TZ |
455 | irqreturn_t (*irq_handler)(int irq, void *arg); |
456 | void (*irq_preinstall)(struct drm_device *dev); | |
457 | int (*irq_postinstall)(struct drm_device *dev); | |
458 | void (*irq_uninstall)(struct drm_device *dev); | |
f397d66b TZ |
459 | u32 (*get_vblank_counter)(struct drm_device *dev, unsigned int pipe); |
460 | int (*enable_vblank)(struct drm_device *dev, unsigned int pipe); | |
461 | void (*disable_vblank)(struct drm_device *dev, unsigned int pipe); | |
0683c0ab | 462 | int dev_priv_size; |
57bb1ee6 | 463 | #endif |
85e634bc DV |
464 | }; |
465 | ||
8f5c7aa0 DV |
466 | void *__devm_drm_dev_alloc(struct device *parent, |
467 | const struct drm_driver *driver, | |
b0b5849e DV |
468 | size_t size, size_t offset); |
469 | ||
470 | /** | |
471 | * devm_drm_dev_alloc - Resource managed allocation of a &drm_device instance | |
472 | * @parent: Parent device object | |
473 | * @driver: DRM driver | |
474 | * @type: the type of the struct which contains struct &drm_device | |
475 | * @member: the name of the &drm_device within @type. | |
476 | * | |
477 | * This allocates and initialize a new DRM device. No device registration is done. | |
478 | * Call drm_dev_register() to advertice the device to user space and register it | |
479 | * with other core subsystems. This should be done last in the device | |
480 | * initialization sequence to make sure userspace can't access an inconsistent | |
481 | * state. | |
482 | * | |
483 | * The initial ref-count of the object is 1. Use drm_dev_get() and | |
484 | * drm_dev_put() to take and drop further ref-counts. | |
485 | * | |
486 | * It is recommended that drivers embed &struct drm_device into their own device | |
487 | * structure. | |
488 | * | |
489 | * Note that this manages the lifetime of the resulting &drm_device | |
490 | * automatically using devres. The DRM device initialized with this function is | |
491 | * automatically put on driver detach using drm_dev_put(). | |
492 | * | |
493 | * RETURNS: | |
494 | * Pointer to new DRM device, or ERR_PTR on failure. | |
495 | */ | |
496 | #define devm_drm_dev_alloc(parent, driver, type, member) \ | |
497 | ((type *) __devm_drm_dev_alloc(parent, driver, sizeof(type), \ | |
498 | offsetof(type, member))) | |
499 | ||
8f5c7aa0 | 500 | struct drm_device *drm_dev_alloc(const struct drm_driver *driver, |
85e634bc DV |
501 | struct device *parent); |
502 | int drm_dev_register(struct drm_device *dev, unsigned long flags); | |
503 | void drm_dev_unregister(struct drm_device *dev); | |
504 | ||
9a96f550 AP |
505 | void drm_dev_get(struct drm_device *dev); |
506 | void drm_dev_put(struct drm_device *dev); | |
85e634bc | 507 | void drm_put_dev(struct drm_device *dev); |
bee330f3 NT |
508 | bool drm_dev_enter(struct drm_device *dev, int *idx); |
509 | void drm_dev_exit(int idx); | |
c07dcd61 DV |
510 | void drm_dev_unplug(struct drm_device *dev); |
511 | ||
512 | /** | |
513 | * drm_dev_is_unplugged - is a DRM device unplugged | |
514 | * @dev: DRM device | |
515 | * | |
516 | * This function can be called to check whether a hotpluggable is unplugged. | |
517 | * Unplugging itself is singalled through drm_dev_unplug(). If a device is | |
518 | * unplugged, these two functions guarantee that any store before calling | |
519 | * drm_dev_unplug() is visible to callers of this function after it completes | |
168982d2 DV |
520 | * |
521 | * WARNING: This function fundamentally races against drm_dev_unplug(). It is | |
522 | * recommended that drivers instead use the underlying drm_dev_enter() and | |
523 | * drm_dev_exit() function pairs. | |
c07dcd61 | 524 | */ |
bee330f3 | 525 | static inline bool drm_dev_is_unplugged(struct drm_device *dev) |
c07dcd61 | 526 | { |
bee330f3 NT |
527 | int idx; |
528 | ||
529 | if (drm_dev_enter(dev, &idx)) { | |
530 | drm_dev_exit(idx); | |
531 | return false; | |
532 | } | |
533 | ||
534 | return true; | |
c07dcd61 DV |
535 | } |
536 | ||
12a1d4e0 JN |
537 | /** |
538 | * drm_core_check_all_features - check driver feature flags mask | |
539 | * @dev: DRM device to check | |
540 | * @features: feature flag(s) mask | |
541 | * | |
542 | * This checks @dev for driver features, see &drm_driver.driver_features, | |
543 | * &drm_device.driver_features, and the various &enum drm_driver_feature flags. | |
544 | * | |
545 | * Returns true if all features in the @features mask are supported, false | |
546 | * otherwise. | |
547 | */ | |
548 | static inline bool drm_core_check_all_features(const struct drm_device *dev, | |
549 | u32 features) | |
550 | { | |
551 | u32 supported = dev->driver->driver_features & dev->driver_features; | |
552 | ||
553 | return features && (supported & features) == features; | |
554 | } | |
555 | ||
3479fc24 DV |
556 | /** |
557 | * drm_core_check_feature - check driver feature flags | |
558 | * @dev: DRM device to check | |
559 | * @feature: feature flag | |
560 | * | |
18ace11f | 561 | * This checks @dev for driver features, see &drm_driver.driver_features, |
0e2a933b | 562 | * &drm_device.driver_features, and the various &enum drm_driver_feature flags. |
3479fc24 DV |
563 | * |
564 | * Returns true if the @feature is supported, false otherwise. | |
565 | */ | |
12a1d4e0 JN |
566 | static inline bool drm_core_check_feature(const struct drm_device *dev, |
567 | enum drm_driver_feature feature) | |
3479fc24 | 568 | { |
12a1d4e0 | 569 | return drm_core_check_all_features(dev, feature); |
3479fc24 DV |
570 | } |
571 | ||
572 | /** | |
573 | * drm_drv_uses_atomic_modeset - check if the driver implements | |
574 | * atomic_commit() | |
575 | * @dev: DRM device | |
576 | * | |
577 | * This check is useful if drivers do not have DRIVER_ATOMIC set but | |
578 | * have atomic modesetting internally implemented. | |
579 | */ | |
580 | static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev) | |
581 | { | |
582 | return drm_core_check_feature(dev, DRIVER_ATOMIC) || | |
57078338 | 583 | (dev->mode_config.funcs && dev->mode_config.funcs->atomic_commit != NULL); |
3479fc24 DV |
584 | } |
585 | ||
85e634bc | 586 | |
9a758d87 TZ |
587 | /* TODO: Inline drm_firmware_drivers_only() in all its callers. */ |
588 | static inline bool drm_firmware_drivers_only(void) | |
589 | { | |
590 | return video_firmware_drivers_only(); | |
591 | } | |
63207455 | 592 | |
85e634bc | 593 | #endif |