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1#ifndef __DRM_GEM_H__
2#define __DRM_GEM_H__
3
4/*
5 * GEM Graphics Execution Manager Driver Interfaces
6 *
7 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
8 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
9 * Copyright (c) 2009-2010, Code Aurora Forum.
10 * All rights reserved.
11 * Copyright © 2014 Intel Corporation
12 * Daniel Vetter <daniel.vetter@ffwll.ch>
13 *
14 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
15 * Author: Gareth Hughes <gareth@valinux.com>
16 *
17 * Permission is hereby granted, free of charge, to any person obtaining a
18 * copy of this software and associated documentation files (the "Software"),
19 * to deal in the Software without restriction, including without limitation
20 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
21 * and/or sell copies of the Software, and to permit persons to whom the
22 * Software is furnished to do so, subject to the following conditions:
23 *
24 * The above copyright notice and this permission notice (including the next
25 * paragraph) shall be included in all copies or substantial portions of the
26 * Software.
27 *
28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
29 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
30 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
31 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
32 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
33 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
34 * OTHER DEALINGS IN THE SOFTWARE.
35 */
36
37#include <linux/kref.h>
38#include <linux/dma-buf.h>
39#include <linux/dma-resv.h>
40#include <linux/list.h>
41#include <linux/mutex.h>
42
43#ifdef CONFIG_TRANSPARENT_HUGEPAGE
44#include <drm/drm_device.h>
45#endif
46#include <drm/drm_vma_manager.h>
47
48struct iosys_map;
49struct drm_gem_object;
50
51/**
52 * enum drm_gem_object_status - bitmask of object state for fdinfo reporting
53 * @DRM_GEM_OBJECT_RESIDENT: object is resident in memory (ie. not unpinned)
54 * @DRM_GEM_OBJECT_PURGEABLE: object marked as purgeable by userspace
55 * @DRM_GEM_OBJECT_ACTIVE: object is currently used by an active submission
56 *
57 * Bitmask of status used for fdinfo memory stats, see &drm_gem_object_funcs.status
58 * and drm_show_fdinfo(). Note that an object can report DRM_GEM_OBJECT_PURGEABLE
59 * and be active or not resident, in which case drm_show_fdinfo() will not
60 * account for it as purgeable. So drivers do not need to check if the buffer
61 * is idle and resident to return this bit, i.e. userspace can mark a buffer as
62 * purgeable even while it is still busy on the GPU. It will not get reported in
63 * the puregeable stats until it becomes idle. The status gem object func does
64 * not need to consider this.
65 */
66enum drm_gem_object_status {
67 DRM_GEM_OBJECT_RESIDENT = BIT(0),
68 DRM_GEM_OBJECT_PURGEABLE = BIT(1),
69 DRM_GEM_OBJECT_ACTIVE = BIT(2),
70};
71
72/**
73 * struct drm_gem_object_funcs - GEM object functions
74 */
75struct drm_gem_object_funcs {
76 /**
77 * @free:
78 *
79 * Deconstructor for drm_gem_objects.
80 *
81 * This callback is mandatory.
82 */
83 void (*free)(struct drm_gem_object *obj);
84
85 /**
86 * @open:
87 *
88 * Called upon GEM handle creation.
89 *
90 * This callback is optional.
91 */
92 int (*open)(struct drm_gem_object *obj, struct drm_file *file);
93
94 /**
95 * @close:
96 *
97 * Called upon GEM handle release.
98 *
99 * This callback is optional.
100 */
101 void (*close)(struct drm_gem_object *obj, struct drm_file *file);
102
103 /**
104 * @print_info:
105 *
106 * If driver subclasses struct &drm_gem_object, it can implement this
107 * optional hook for printing additional driver specific info.
108 *
109 * drm_printf_indent() should be used in the callback passing it the
110 * indent argument.
111 *
112 * This callback is called from drm_gem_print_info().
113 *
114 * This callback is optional.
115 */
116 void (*print_info)(struct drm_printer *p, unsigned int indent,
117 const struct drm_gem_object *obj);
118
119 /**
120 * @export:
121 *
122 * Export backing buffer as a &dma_buf.
123 * If this is not set drm_gem_prime_export() is used.
124 *
125 * This callback is optional.
126 */
127 struct dma_buf *(*export)(struct drm_gem_object *obj, int flags);
128
129 /**
130 * @pin:
131 *
132 * Pin backing buffer in memory, such that dma-buf importers can
133 * access it. Used by the drm_gem_map_attach() helper.
134 *
135 * This callback is optional.
136 */
137 int (*pin)(struct drm_gem_object *obj);
138
139 /**
140 * @unpin:
141 *
142 * Unpin backing buffer. Used by the drm_gem_map_detach() helper.
143 *
144 * This callback is optional.
145 */
146 void (*unpin)(struct drm_gem_object *obj);
147
148 /**
149 * @get_sg_table:
150 *
151 * Returns a Scatter-Gather table representation of the buffer.
152 * Used when exporting a buffer by the drm_gem_map_dma_buf() helper.
153 * Releasing is done by calling dma_unmap_sg_attrs() and sg_free_table()
154 * in drm_gem_unmap_buf(), therefore these helpers and this callback
155 * here cannot be used for sg tables pointing at driver private memory
156 * ranges.
157 *
158 * See also drm_prime_pages_to_sg().
159 */
160 struct sg_table *(*get_sg_table)(struct drm_gem_object *obj);
161
162 /**
163 * @vmap:
164 *
165 * Returns a virtual address for the buffer. Used by the
166 * drm_gem_dmabuf_vmap() helper. Called with a held GEM reservation
167 * lock.
168 *
169 * This callback is optional.
170 */
171 int (*vmap)(struct drm_gem_object *obj, struct iosys_map *map);
172
173 /**
174 * @vunmap:
175 *
176 * Releases the address previously returned by @vmap. Used by the
177 * drm_gem_dmabuf_vunmap() helper. Called with a held GEM reservation
178 * lock.
179 *
180 * This callback is optional.
181 */
182 void (*vunmap)(struct drm_gem_object *obj, struct iosys_map *map);
183
184 /**
185 * @mmap:
186 *
187 * Handle mmap() of the gem object, setup vma accordingly.
188 *
189 * This callback is optional.
190 *
191 * The callback is used by both drm_gem_mmap_obj() and
192 * drm_gem_prime_mmap(). When @mmap is present @vm_ops is not
193 * used, the @mmap callback must set vma->vm_ops instead.
194 */
195 int (*mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma);
196
197 /**
198 * @evict:
199 *
200 * Evicts gem object out from memory. Used by the drm_gem_object_evict()
201 * helper. Returns 0 on success, -errno otherwise. Called with a held
202 * GEM reservation lock.
203 *
204 * This callback is optional.
205 */
206 int (*evict)(struct drm_gem_object *obj);
207
208 /**
209 * @status:
210 *
211 * The optional status callback can return additional object state
212 * which determines which stats the object is counted against. The
213 * callback is called under table_lock. Racing against object status
214 * change is "harmless", and the callback can expect to not race
215 * against object destruction.
216 *
217 * Called by drm_show_memory_stats().
218 */
219 enum drm_gem_object_status (*status)(struct drm_gem_object *obj);
220
221 /**
222 * @rss:
223 *
224 * Return resident size of the object in physical memory.
225 *
226 * Called by drm_show_memory_stats().
227 */
228 size_t (*rss)(struct drm_gem_object *obj);
229
230 /**
231 * @vm_ops:
232 *
233 * Virtual memory operations used with mmap.
234 *
235 * This is optional but necessary for mmap support.
236 */
237 const struct vm_operations_struct *vm_ops;
238};
239
240/**
241 * struct drm_gem_lru - A simple LRU helper
242 *
243 * A helper for tracking GEM objects in a given state, to aid in
244 * driver's shrinker implementation. Tracks the count of pages
245 * for lockless &shrinker.count_objects, and provides
246 * &drm_gem_lru_scan for driver's &shrinker.scan_objects
247 * implementation.
248 */
249struct drm_gem_lru {
250 /**
251 * @lock:
252 *
253 * Lock protecting movement of GEM objects between LRUs. All
254 * LRUs that the object can move between should be protected
255 * by the same lock.
256 */
257 struct mutex *lock;
258
259 /**
260 * @count:
261 *
262 * The total number of backing pages of the GEM objects in
263 * this LRU.
264 */
265 long count;
266
267 /**
268 * @list:
269 *
270 * The LRU list.
271 */
272 struct list_head list;
273};
274
275/**
276 * struct drm_gem_object - GEM buffer object
277 *
278 * This structure defines the generic parts for GEM buffer objects, which are
279 * mostly around handling mmap and userspace handles.
280 *
281 * Buffer objects are often abbreviated to BO.
282 */
283struct drm_gem_object {
284 /**
285 * @refcount:
286 *
287 * Reference count of this object
288 *
289 * Please use drm_gem_object_get() to acquire and drm_gem_object_put_locked()
290 * or drm_gem_object_put() to release a reference to a GEM
291 * buffer object.
292 */
293 struct kref refcount;
294
295 /**
296 * @handle_count:
297 *
298 * This is the GEM file_priv handle count of this object.
299 *
300 * Each handle also holds a reference. Note that when the handle_count
301 * drops to 0 any global names (e.g. the id in the flink namespace) will
302 * be cleared.
303 *
304 * Protected by &drm_device.object_name_lock.
305 */
306 unsigned handle_count;
307
308 /**
309 * @dev: DRM dev this object belongs to.
310 */
311 struct drm_device *dev;
312
313 /**
314 * @filp:
315 *
316 * SHMEM file node used as backing storage for swappable buffer objects.
317 * GEM also supports driver private objects with driver-specific backing
318 * storage (contiguous DMA memory, special reserved blocks). In this
319 * case @filp is NULL.
320 */
321 struct file *filp;
322
323 /**
324 * @vma_node:
325 *
326 * Mapping info for this object to support mmap. Drivers are supposed to
327 * allocate the mmap offset using drm_gem_create_mmap_offset(). The
328 * offset itself can be retrieved using drm_vma_node_offset_addr().
329 *
330 * Memory mapping itself is handled by drm_gem_mmap(), which also checks
331 * that userspace is allowed to access the object.
332 */
333 struct drm_vma_offset_node vma_node;
334
335 /**
336 * @size:
337 *
338 * Size of the object, in bytes. Immutable over the object's
339 * lifetime.
340 */
341 size_t size;
342
343 /**
344 * @name:
345 *
346 * Global name for this object, starts at 1. 0 means unnamed.
347 * Access is covered by &drm_device.object_name_lock. This is used by
348 * the GEM_FLINK and GEM_OPEN ioctls.
349 */
350 int name;
351
352 /**
353 * @dma_buf:
354 *
355 * dma-buf associated with this GEM object.
356 *
357 * Pointer to the dma-buf associated with this gem object (either
358 * through importing or exporting). We break the resulting reference
359 * loop when the last gem handle for this object is released.
360 *
361 * Protected by &drm_device.object_name_lock.
362 */
363 struct dma_buf *dma_buf;
364
365 /**
366 * @import_attach:
367 *
368 * dma-buf attachment backing this object.
369 *
370 * Any foreign dma_buf imported as a gem object has this set to the
371 * attachment point for the device. This is invariant over the lifetime
372 * of a gem object.
373 *
374 * The &drm_gem_object_funcs.free callback is responsible for
375 * cleaning up the dma_buf attachment and references acquired at import
376 * time.
377 *
378 * Note that the drm gem/prime core does not depend upon drivers setting
379 * this field any more. So for drivers where this doesn't make sense
380 * (e.g. virtual devices or a displaylink behind an usb bus) they can
381 * simply leave it as NULL.
382 */
383 struct dma_buf_attachment *import_attach;
384
385 /**
386 * @resv:
387 *
388 * Pointer to reservation object associated with the this GEM object.
389 *
390 * Normally (@resv == &@_resv) except for imported GEM objects.
391 */
392 struct dma_resv *resv;
393
394 /**
395 * @_resv:
396 *
397 * A reservation object for this GEM object.
398 *
399 * This is unused for imported GEM objects.
400 */
401 struct dma_resv _resv;
402
403 /**
404 * @gpuva: Fields used by GPUVM to manage mappings pointing to this GEM object.
405 *
406 * When DRM_GPUVM_IMMEDIATE_MODE is set, this list is protected by the
407 * mutex. Otherwise, the list is protected by the GEMs &dma_resv lock.
408 *
409 * Note that all entries in this list must agree on whether
410 * DRM_GPUVM_IMMEDIATE_MODE is set.
411 */
412 struct {
413 /**
414 * @gpuva.list: list of GPUVM mappings attached to this GEM object.
415 *
416 * Drivers should lock list accesses with either the GEMs
417 * &dma_resv lock (&drm_gem_object.resv) or the
418 * &drm_gem_object.gpuva.lock mutex.
419 */
420 struct list_head list;
421
422 /**
423 * @gpuva.lock: lock protecting access to &drm_gem_object.gpuva.list
424 * when DRM_GPUVM_IMMEDIATE_MODE is used.
425 *
426 * Only used when DRM_GPUVM_IMMEDIATE_MODE is set. It should be
427 * safe to take this mutex during the fence signalling path, so
428 * do not allocate memory while holding this lock. Otherwise,
429 * the &dma_resv lock should be used.
430 */
431 struct mutex lock;
432 } gpuva;
433
434 /**
435 * @funcs:
436 *
437 * Optional GEM object functions. If this is set, it will be used instead of the
438 * corresponding &drm_driver GEM callbacks.
439 *
440 * New drivers should use this.
441 *
442 */
443 const struct drm_gem_object_funcs *funcs;
444
445 /**
446 * @lru_node:
447 *
448 * List node in a &drm_gem_lru.
449 */
450 struct list_head lru_node;
451
452 /**
453 * @lru:
454 *
455 * The current LRU list that the GEM object is on.
456 */
457 struct drm_gem_lru *lru;
458};
459
460/**
461 * DRM_GEM_FOPS - Default drm GEM file operations
462 *
463 * This macro provides a shorthand for setting the GEM file ops in the
464 * &file_operations structure. If all you need are the default ops, use
465 * DEFINE_DRM_GEM_FOPS instead.
466 */
467#define DRM_GEM_FOPS \
468 .open = drm_open,\
469 .release = drm_release,\
470 .unlocked_ioctl = drm_ioctl,\
471 .compat_ioctl = drm_compat_ioctl,\
472 .poll = drm_poll,\
473 .read = drm_read,\
474 .llseek = noop_llseek,\
475 .get_unmapped_area = drm_gem_get_unmapped_area,\
476 .mmap = drm_gem_mmap, \
477 .fop_flags = FOP_UNSIGNED_OFFSET
478
479/**
480 * DEFINE_DRM_GEM_FOPS() - macro to generate file operations for GEM drivers
481 * @name: name for the generated structure
482 *
483 * This macro autogenerates a suitable &struct file_operations for GEM based
484 * drivers, which can be assigned to &drm_driver.fops. Note that this structure
485 * cannot be shared between drivers, because it contains a reference to the
486 * current module using THIS_MODULE.
487 *
488 * Note that the declaration is already marked as static - if you need a
489 * non-static version of this you're probably doing it wrong and will break the
490 * THIS_MODULE reference by accident.
491 */
492#define DEFINE_DRM_GEM_FOPS(name) \
493 static const struct file_operations name = {\
494 .owner = THIS_MODULE,\
495 DRM_GEM_FOPS,\
496 }
497
498#ifdef CONFIG_TRANSPARENT_HUGEPAGE
499int drm_gem_huge_mnt_create(struct drm_device *dev, const char *value);
500#else
501static inline int drm_gem_huge_mnt_create(struct drm_device *dev,
502 const char *value)
503{
504 return 0;
505}
506#endif
507
508/**
509 * drm_gem_get_huge_mnt - Get the huge tmpfs mountpoint used by a DRM device
510 * @dev: DRM device
511 *
512 * This function gets the huge tmpfs mountpoint used by DRM device @dev. A huge
513 * tmpfs mountpoint is used instead of `shm_mnt` after a successful call to
514 * drm_gem_huge_mnt_create() when CONFIG_TRANSPARENT_HUGEPAGE is enabled.
515 *
516 * Returns:
517 * The huge tmpfs mountpoint in use, NULL otherwise.
518 */
519static inline struct vfsmount *drm_gem_get_huge_mnt(struct drm_device *dev)
520{
521#ifdef CONFIG_TRANSPARENT_HUGEPAGE
522 return dev->huge_mnt;
523#else
524 return NULL;
525#endif
526}
527
528void drm_gem_object_release(struct drm_gem_object *obj);
529void drm_gem_object_free(struct kref *kref);
530int drm_gem_object_init(struct drm_device *dev,
531 struct drm_gem_object *obj, size_t size);
532void drm_gem_private_object_init(struct drm_device *dev,
533 struct drm_gem_object *obj, size_t size);
534void drm_gem_private_object_fini(struct drm_gem_object *obj);
535void drm_gem_vm_open(struct vm_area_struct *vma);
536void drm_gem_vm_close(struct vm_area_struct *vma);
537int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
538 struct vm_area_struct *vma);
539int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
540
541#ifdef CONFIG_MMU
542unsigned long drm_gem_get_unmapped_area(struct file *filp, unsigned long uaddr,
543 unsigned long len, unsigned long pgoff,
544 unsigned long flags);
545#else
546#define drm_gem_get_unmapped_area NULL
547#endif
548
549/**
550 * drm_gem_object_get - acquire a GEM buffer object reference
551 * @obj: GEM buffer object
552 *
553 * This function acquires an additional reference to @obj. It is illegal to
554 * call this without already holding a reference. No locks required.
555 */
556static inline void drm_gem_object_get(struct drm_gem_object *obj)
557{
558 kref_get(&obj->refcount);
559}
560
561__attribute__((nonnull))
562static inline void
563__drm_gem_object_put(struct drm_gem_object *obj)
564{
565 kref_put(&obj->refcount, drm_gem_object_free);
566}
567
568/**
569 * drm_gem_object_put - drop a GEM buffer object reference
570 * @obj: GEM buffer object
571 *
572 * This releases a reference to @obj.
573 */
574static inline void
575drm_gem_object_put(struct drm_gem_object *obj)
576{
577 if (obj)
578 __drm_gem_object_put(obj);
579}
580
581int drm_gem_handle_create(struct drm_file *file_priv,
582 struct drm_gem_object *obj,
583 u32 *handlep);
584int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
585
586
587void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
588int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
589int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
590
591struct page **drm_gem_get_pages(struct drm_gem_object *obj);
592void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
593 bool dirty, bool accessed);
594
595void drm_gem_lock(struct drm_gem_object *obj);
596void drm_gem_unlock(struct drm_gem_object *obj);
597
598int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map);
599void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map);
600
601int drm_gem_objects_lookup(struct drm_file *filp, void __user *bo_handles,
602 int count, struct drm_gem_object ***objs_out);
603struct drm_gem_object *drm_gem_object_lookup(struct drm_file *filp, u32 handle);
604long drm_gem_dma_resv_wait(struct drm_file *filep, u32 handle,
605 bool wait_all, unsigned long timeout);
606int drm_gem_lock_reservations(struct drm_gem_object **objs, int count,
607 struct ww_acquire_ctx *acquire_ctx);
608void drm_gem_unlock_reservations(struct drm_gem_object **objs, int count,
609 struct ww_acquire_ctx *acquire_ctx);
610int drm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
611 u32 handle, u64 *offset);
612
613void drm_gem_lru_init(struct drm_gem_lru *lru, struct mutex *lock);
614void drm_gem_lru_remove(struct drm_gem_object *obj);
615void drm_gem_lru_move_tail_locked(struct drm_gem_lru *lru, struct drm_gem_object *obj);
616void drm_gem_lru_move_tail(struct drm_gem_lru *lru, struct drm_gem_object *obj);
617unsigned long
618drm_gem_lru_scan(struct drm_gem_lru *lru,
619 unsigned int nr_to_scan,
620 unsigned long *remaining,
621 bool (*shrink)(struct drm_gem_object *obj, struct ww_acquire_ctx *ticket),
622 struct ww_acquire_ctx *ticket);
623
624int drm_gem_evict_locked(struct drm_gem_object *obj);
625
626/**
627 * drm_gem_object_is_shared_for_memory_stats - helper for shared memory stats
628 *
629 * This helper should only be used for fdinfo shared memory stats to determine
630 * if a GEM object is shared.
631 *
632 * @obj: obj in question
633 */
634static inline bool drm_gem_object_is_shared_for_memory_stats(struct drm_gem_object *obj)
635{
636 return (obj->handle_count > 1) || obj->dma_buf;
637}
638
639/**
640 * drm_gem_is_imported() - Tests if GEM object's buffer has been imported
641 * @obj: the GEM object
642 *
643 * Returns:
644 * True if the GEM object's buffer has been imported, false otherwise
645 */
646static inline bool drm_gem_is_imported(const struct drm_gem_object *obj)
647{
648 return !!obj->import_attach;
649}
650
651#ifdef CONFIG_LOCKDEP
652#define drm_gem_gpuva_assert_lock_held(gpuvm, obj) \
653 lockdep_assert(drm_gpuvm_immediate_mode(gpuvm) ? \
654 lockdep_is_held(&(obj)->gpuva.lock) : \
655 dma_resv_held((obj)->resv))
656#else
657#define drm_gem_gpuva_assert_lock_held(gpuvm, obj) do {} while (0)
658#endif
659
660/**
661 * drm_gem_gpuva_init() - initialize the gpuva list of a GEM object
662 * @obj: the &drm_gem_object
663 *
664 * This initializes the &drm_gem_object's &drm_gpuvm_bo list.
665 *
666 * Calling this function is only necessary for drivers intending to support the
667 * &drm_driver_feature DRIVER_GEM_GPUVA.
668 *
669 * See also drm_gem_gpuva_set_lock().
670 */
671static inline void drm_gem_gpuva_init(struct drm_gem_object *obj)
672{
673 INIT_LIST_HEAD(&obj->gpuva.list);
674}
675
676/**
677 * drm_gem_for_each_gpuvm_bo() - iterator to walk over a list of &drm_gpuvm_bo
678 * @entry__: &drm_gpuvm_bo structure to assign to in each iteration step
679 * @obj__: the &drm_gem_object the &drm_gpuvm_bo to walk are associated with
680 *
681 * This iterator walks over all &drm_gpuvm_bo structures associated with the
682 * &drm_gem_object.
683 */
684#define drm_gem_for_each_gpuvm_bo(entry__, obj__) \
685 list_for_each_entry(entry__, &(obj__)->gpuva.list, list.entry.gem)
686
687/**
688 * drm_gem_for_each_gpuvm_bo_safe() - iterator to safely walk over a list of
689 * &drm_gpuvm_bo
690 * @entry__: &drm_gpuvm_bostructure to assign to in each iteration step
691 * @next__: &next &drm_gpuvm_bo to store the next step
692 * @obj__: the &drm_gem_object the &drm_gpuvm_bo to walk are associated with
693 *
694 * This iterator walks over all &drm_gpuvm_bo structures associated with the
695 * &drm_gem_object. It is implemented with list_for_each_entry_safe(), hence
696 * it is save against removal of elements.
697 */
698#define drm_gem_for_each_gpuvm_bo_safe(entry__, next__, obj__) \
699 list_for_each_entry_safe(entry__, next__, &(obj__)->gpuva.list, list.entry.gem)
700
701#endif /* __DRM_GEM_H__ */