1/* SPDX-License-Identifier: MIT */
2/*
3 * Copyright © 2016 Intel Corporation
4 */
5
6#ifndef __I915_GEM_OBJECT_H__
7#define __I915_GEM_OBJECT_H__
8
9#include <drm/drm_gem.h>
10#include <drm/drm_file.h>
11#include <drm/drm_device.h>
12
13#include "intel_memory_region.h"
14#include "i915_gem_object_types.h"
15#include "i915_gem_gtt.h"
16#include "i915_gem_ww.h"
17#include "i915_vma_types.h"
18
19enum intel_region_id;
20struct drm_scanout_buffer;
21struct intel_panic;
22
23#define obj_to_i915(obj__) to_i915((obj__)->base.dev)
24
25static inline bool i915_gem_object_size_2big(u64 size)
26{
27 struct drm_i915_gem_object *obj;
28
29 if (overflows_type(size, obj->base.size))
30 return true;
31
32 return false;
33}
34
35unsigned int i915_gem_get_pat_index(struct drm_i915_private *i915,
36 enum i915_cache_level level);
37bool i915_gem_object_has_cache_level(const struct drm_i915_gem_object *obj,
38 enum i915_cache_level lvl);
39void i915_gem_init__objects(struct drm_i915_private *i915);
40
41void i915_objects_module_exit(void);
42int i915_objects_module_init(void);
43
44struct drm_i915_gem_object *i915_gem_object_alloc(void);
45void i915_gem_object_free(struct drm_i915_gem_object *obj);
46
47void i915_gem_object_init(struct drm_i915_gem_object *obj,
48 const struct drm_i915_gem_object_ops *ops,
49 struct lock_class_key *key,
50 unsigned alloc_flags);
51
52void __i915_gem_object_fini(struct drm_i915_gem_object *obj);
53
54struct drm_i915_gem_object *
55i915_gem_object_create_shmem(struct drm_i915_private *i915,
56 resource_size_t size);
57struct drm_i915_gem_object *
58i915_gem_object_create_shmem_from_data(struct drm_i915_private *i915,
59 const void *data, resource_size_t size);
60struct drm_i915_gem_object *
61__i915_gem_object_create_user(struct drm_i915_private *i915, u64 size,
62 struct intel_memory_region **placements,
63 unsigned int n_placements);
64
65extern const struct drm_i915_gem_object_ops i915_gem_shmem_ops;
66
67void __i915_gem_object_release_shmem(struct drm_i915_gem_object *obj,
68 struct sg_table *pages,
69 bool needs_clflush);
70
71int i915_gem_object_pwrite_phys(struct drm_i915_gem_object *obj,
72 const struct drm_i915_gem_pwrite *args);
73int i915_gem_object_pread_phys(struct drm_i915_gem_object *obj,
74 const struct drm_i915_gem_pread *args);
75
76int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, int align);
77void i915_gem_object_put_pages_shmem(struct drm_i915_gem_object *obj,
78 struct sg_table *pages);
79void i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj,
80 struct sg_table *pages);
81
82void i915_gem_flush_free_objects(struct drm_i915_private *i915);
83
84struct sg_table *
85__i915_gem_object_unset_pages(struct drm_i915_gem_object *obj);
86
87/**
88 * i915_gem_object_lookup_rcu - look up a temporary GEM object from its handle
89 * @file: DRM file private date
90 * @handle: userspace handle
91 *
92 * Returns:
93 * A pointer to the object named by the handle if such exists on @filp, NULL
94 * otherwise. This object is only valid whilst under the RCU read lock, and
95 * note carefully the object may be in the process of being destroyed.
96 */
97static inline struct drm_i915_gem_object *
98i915_gem_object_lookup_rcu(struct drm_file *file, u32 handle)
99{
100#ifdef CONFIG_LOCKDEP
101 WARN_ON(debug_locks && !lock_is_held(&rcu_lock_map));
102#endif
103 return idr_find(&file->object_idr, id: handle);
104}
105
106static inline struct drm_i915_gem_object *
107i915_gem_object_get_rcu(struct drm_i915_gem_object *obj)
108{
109 if (obj && !kref_get_unless_zero(kref: &obj->base.refcount))
110 obj = NULL;
111
112 return obj;
113}
114
115static inline struct drm_i915_gem_object *
116i915_gem_object_lookup(struct drm_file *file, u32 handle)
117{
118 struct drm_i915_gem_object *obj;
119
120 rcu_read_lock();
121 obj = i915_gem_object_lookup_rcu(file, handle);
122 obj = i915_gem_object_get_rcu(obj);
123 rcu_read_unlock();
124
125 return obj;
126}
127
128__deprecated
129struct drm_gem_object *
130drm_gem_object_lookup(struct drm_file *file, u32 handle);
131
132__attribute__((nonnull))
133static inline struct drm_i915_gem_object *
134i915_gem_object_get(struct drm_i915_gem_object *obj)
135{
136 drm_gem_object_get(obj: &obj->base);
137 return obj;
138}
139
140__attribute__((nonnull))
141static inline void
142i915_gem_object_put(struct drm_i915_gem_object *obj)
143{
144 __drm_gem_object_put(obj: &obj->base);
145}
146
147#define assert_object_held(obj) dma_resv_assert_held((obj)->base.resv)
148
149/*
150 * If more than one potential simultaneous locker, assert held.
151 */
152static inline void assert_object_held_shared(const struct drm_i915_gem_object *obj)
153{
154 /*
155 * Note mm list lookup is protected by
156 * kref_get_unless_zero().
157 */
158 if (IS_ENABLED(CONFIG_LOCKDEP) &&
159 kref_read(kref: &obj->base.refcount) > 0)
160 assert_object_held(obj);
161}
162
163static inline int __i915_gem_object_lock(struct drm_i915_gem_object *obj,
164 struct i915_gem_ww_ctx *ww,
165 bool intr)
166{
167 int ret;
168
169 if (intr)
170 ret = dma_resv_lock_interruptible(obj: obj->base.resv, ctx: ww ? &ww->ctx : NULL);
171 else
172 ret = dma_resv_lock(obj: obj->base.resv, ctx: ww ? &ww->ctx : NULL);
173
174 if (!ret && ww) {
175 i915_gem_object_get(obj);
176 list_add_tail(new: &obj->obj_link, head: &ww->obj_list);
177 }
178 if (ret == -EALREADY)
179 ret = 0;
180
181 if (ret == -EDEADLK) {
182 i915_gem_object_get(obj);
183 ww->contended = obj;
184 }
185
186 return ret;
187}
188
189static inline int i915_gem_object_lock(struct drm_i915_gem_object *obj,
190 struct i915_gem_ww_ctx *ww)
191{
192 return __i915_gem_object_lock(obj, ww, intr: ww && ww->intr);
193}
194
195static inline int i915_gem_object_lock_interruptible(struct drm_i915_gem_object *obj,
196 struct i915_gem_ww_ctx *ww)
197{
198 WARN_ON(ww && !ww->intr);
199 return __i915_gem_object_lock(obj, ww, intr: true);
200}
201
202static inline bool i915_gem_object_trylock(struct drm_i915_gem_object *obj,
203 struct i915_gem_ww_ctx *ww)
204{
205 if (!ww)
206 return dma_resv_trylock(obj: obj->base.resv);
207 else
208 return ww_mutex_trylock(lock: &obj->base.resv->lock, ctx: &ww->ctx);
209}
210
211static inline void i915_gem_object_unlock(struct drm_i915_gem_object *obj)
212{
213 if (obj->ops->adjust_lru)
214 obj->ops->adjust_lru(obj);
215
216 dma_resv_unlock(obj: obj->base.resv);
217}
218
219static inline void
220i915_gem_object_set_readonly(struct drm_i915_gem_object *obj)
221{
222 obj->flags |= I915_BO_READONLY;
223}
224
225static inline bool
226i915_gem_object_is_readonly(const struct drm_i915_gem_object *obj)
227{
228 return obj->flags & I915_BO_READONLY;
229}
230
231static inline bool
232i915_gem_object_is_contiguous(const struct drm_i915_gem_object *obj)
233{
234 return obj->flags & I915_BO_ALLOC_CONTIGUOUS;
235}
236
237static inline bool
238i915_gem_object_is_volatile(const struct drm_i915_gem_object *obj)
239{
240 return obj->flags & I915_BO_ALLOC_VOLATILE;
241}
242
243static inline void
244i915_gem_object_set_volatile(struct drm_i915_gem_object *obj)
245{
246 obj->flags |= I915_BO_ALLOC_VOLATILE;
247}
248
249static inline bool
250i915_gem_object_has_tiling_quirk(struct drm_i915_gem_object *obj)
251{
252 return test_bit(I915_TILING_QUIRK_BIT, &obj->flags);
253}
254
255static inline void
256i915_gem_object_set_tiling_quirk(struct drm_i915_gem_object *obj)
257{
258 set_bit(I915_TILING_QUIRK_BIT, addr: &obj->flags);
259}
260
261static inline void
262i915_gem_object_clear_tiling_quirk(struct drm_i915_gem_object *obj)
263{
264 clear_bit(I915_TILING_QUIRK_BIT, addr: &obj->flags);
265}
266
267static inline bool
268i915_gem_object_is_protected(const struct drm_i915_gem_object *obj)
269{
270 return obj->flags & I915_BO_PROTECTED;
271}
272
273static inline bool
274i915_gem_object_type_has(const struct drm_i915_gem_object *obj,
275 unsigned long flags)
276{
277 return obj->ops->flags & flags;
278}
279
280bool i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj);
281
282bool i915_gem_object_has_iomem(const struct drm_i915_gem_object *obj);
283
284static inline bool
285i915_gem_object_is_shrinkable(const struct drm_i915_gem_object *obj)
286{
287 return i915_gem_object_type_has(obj, I915_GEM_OBJECT_IS_SHRINKABLE);
288}
289
290static inline bool
291i915_gem_object_has_self_managed_shrink_list(const struct drm_i915_gem_object *obj)
292{
293 return i915_gem_object_type_has(obj, I915_GEM_OBJECT_SELF_MANAGED_SHRINK_LIST);
294}
295
296static inline bool
297i915_gem_object_is_proxy(const struct drm_i915_gem_object *obj)
298{
299 return i915_gem_object_type_has(obj, I915_GEM_OBJECT_IS_PROXY);
300}
301
302static inline bool
303i915_gem_object_never_mmap(const struct drm_i915_gem_object *obj)
304{
305 return i915_gem_object_type_has(obj, I915_GEM_OBJECT_NO_MMAP);
306}
307
308static inline bool
309i915_gem_object_is_framebuffer(const struct drm_i915_gem_object *obj)
310{
311 return READ_ONCE(obj->frontbuffer) || obj->is_dpt;
312}
313
314static inline unsigned int
315i915_gem_object_get_tiling(const struct drm_i915_gem_object *obj)
316{
317 return obj->tiling_and_stride & TILING_MASK;
318}
319
320static inline bool
321i915_gem_object_is_tiled(const struct drm_i915_gem_object *obj)
322{
323 return i915_gem_object_get_tiling(obj) != I915_TILING_NONE;
324}
325
326static inline unsigned int
327i915_gem_object_get_stride(const struct drm_i915_gem_object *obj)
328{
329 return obj->tiling_and_stride & STRIDE_MASK;
330}
331
332static inline unsigned int
333i915_gem_tile_height(unsigned int tiling)
334{
335 GEM_BUG_ON(!tiling);
336 return tiling == I915_TILING_Y ? 32 : 8;
337}
338
339static inline unsigned int
340i915_gem_object_get_tile_height(const struct drm_i915_gem_object *obj)
341{
342 return i915_gem_tile_height(tiling: i915_gem_object_get_tiling(obj));
343}
344
345static inline unsigned int
346i915_gem_object_get_tile_row_size(const struct drm_i915_gem_object *obj)
347{
348 return (i915_gem_object_get_stride(obj) *
349 i915_gem_object_get_tile_height(obj));
350}
351
352int i915_gem_object_set_tiling(struct drm_i915_gem_object *obj,
353 unsigned int tiling, unsigned int stride);
354
355/**
356 * __i915_gem_object_page_iter_get_sg - helper to find the target scatterlist
357 * pointer and the target page position using pgoff_t n input argument and
358 * i915_gem_object_page_iter
359 * @obj: i915 GEM buffer object
360 * @iter: i915 GEM buffer object page iterator
361 * @n: page offset
362 * @offset: searched physical offset,
363 * it will be used for returning physical page offset value
364 *
365 * Context: Takes and releases the mutex lock of the i915_gem_object_page_iter.
366 * Takes and releases the RCU lock to search the radix_tree of
367 * i915_gem_object_page_iter.
368 *
369 * Returns:
370 * The target scatterlist pointer and the target page position.
371 *
372 * Recommended to use wrapper macro: i915_gem_object_page_iter_get_sg()
373 */
374struct scatterlist *
375__i915_gem_object_page_iter_get_sg(struct drm_i915_gem_object *obj,
376 struct i915_gem_object_page_iter *iter,
377 pgoff_t n,
378 unsigned int *offset);
379
380/**
381 * i915_gem_object_page_iter_get_sg - wrapper macro for
382 * __i915_gem_object_page_iter_get_sg()
383 * @obj: i915 GEM buffer object
384 * @it: i915 GEM buffer object page iterator
385 * @n: page offset
386 * @offset: searched physical offset,
387 * it will be used for returning physical page offset value
388 *
389 * Context: Takes and releases the mutex lock of the i915_gem_object_page_iter.
390 * Takes and releases the RCU lock to search the radix_tree of
391 * i915_gem_object_page_iter.
392 *
393 * Returns:
394 * The target scatterlist pointer and the target page position.
395 *
396 * In order to avoid the truncation of the input parameter, it checks the page
397 * offset n's type from the input parameter before calling
398 * __i915_gem_object_page_iter_get_sg().
399 */
400#define i915_gem_object_page_iter_get_sg(obj, it, n, offset) ({ \
401 static_assert(castable_to_type(n, pgoff_t)); \
402 __i915_gem_object_page_iter_get_sg(obj, it, n, offset); \
403})
404
405/**
406 * __i915_gem_object_get_sg - helper to find the target scatterlist
407 * pointer and the target page position using pgoff_t n input argument and
408 * drm_i915_gem_object. It uses an internal shmem scatterlist lookup function.
409 * @obj: i915 GEM buffer object
410 * @n: page offset
411 * @offset: searched physical offset,
412 * it will be used for returning physical page offset value
413 *
414 * It uses drm_i915_gem_object's internal shmem scatterlist lookup function as
415 * i915_gem_object_page_iter and calls __i915_gem_object_page_iter_get_sg().
416 *
417 * Returns:
418 * The target scatterlist pointer and the target page position.
419 *
420 * Recommended to use wrapper macro: i915_gem_object_get_sg()
421 * See also __i915_gem_object_page_iter_get_sg()
422 */
423static inline struct scatterlist *
424__i915_gem_object_get_sg(struct drm_i915_gem_object *obj, pgoff_t n,
425 unsigned int *offset)
426{
427 return __i915_gem_object_page_iter_get_sg(obj, iter: &obj->mm.get_page, n, offset);
428}
429
430/**
431 * i915_gem_object_get_sg - wrapper macro for __i915_gem_object_get_sg()
432 * @obj: i915 GEM buffer object
433 * @n: page offset
434 * @offset: searched physical offset,
435 * it will be used for returning physical page offset value
436 *
437 * Returns:
438 * The target scatterlist pointer and the target page position.
439 *
440 * In order to avoid the truncation of the input parameter, it checks the page
441 * offset n's type from the input parameter before calling
442 * __i915_gem_object_get_sg().
443 * See also __i915_gem_object_page_iter_get_sg()
444 */
445#define i915_gem_object_get_sg(obj, n, offset) ({ \
446 static_assert(castable_to_type(n, pgoff_t)); \
447 __i915_gem_object_get_sg(obj, n, offset); \
448})
449
450/**
451 * __i915_gem_object_get_sg_dma - helper to find the target scatterlist
452 * pointer and the target page position using pgoff_t n input argument and
453 * drm_i915_gem_object. It uses an internal DMA mapped scatterlist lookup function
454 * @obj: i915 GEM buffer object
455 * @n: page offset
456 * @offset: searched physical offset,
457 * it will be used for returning physical page offset value
458 *
459 * It uses drm_i915_gem_object's internal DMA mapped scatterlist lookup function
460 * as i915_gem_object_page_iter and calls __i915_gem_object_page_iter_get_sg().
461 *
462 * Returns:
463 * The target scatterlist pointer and the target page position.
464 *
465 * Recommended to use wrapper macro: i915_gem_object_get_sg_dma()
466 * See also __i915_gem_object_page_iter_get_sg()
467 */
468static inline struct scatterlist *
469__i915_gem_object_get_sg_dma(struct drm_i915_gem_object *obj, pgoff_t n,
470 unsigned int *offset)
471{
472 return __i915_gem_object_page_iter_get_sg(obj, iter: &obj->mm.get_dma_page, n, offset);
473}
474
475/**
476 * i915_gem_object_get_sg_dma - wrapper macro for __i915_gem_object_get_sg_dma()
477 * @obj: i915 GEM buffer object
478 * @n: page offset
479 * @offset: searched physical offset,
480 * it will be used for returning physical page offset value
481 *
482 * Returns:
483 * The target scatterlist pointer and the target page position.
484 *
485 * In order to avoid the truncation of the input parameter, it checks the page
486 * offset n's type from the input parameter before calling
487 * __i915_gem_object_get_sg_dma().
488 * See also __i915_gem_object_page_iter_get_sg()
489 */
490#define i915_gem_object_get_sg_dma(obj, n, offset) ({ \
491 static_assert(castable_to_type(n, pgoff_t)); \
492 __i915_gem_object_get_sg_dma(obj, n, offset); \
493})
494
495/**
496 * __i915_gem_object_get_page - helper to find the target page with a page offset
497 * @obj: i915 GEM buffer object
498 * @n: page offset
499 *
500 * It uses drm_i915_gem_object's internal shmem scatterlist lookup function as
501 * i915_gem_object_page_iter and calls __i915_gem_object_page_iter_get_sg()
502 * internally.
503 *
504 * Returns:
505 * The target page pointer.
506 *
507 * Recommended to use wrapper macro: i915_gem_object_get_page()
508 * See also __i915_gem_object_page_iter_get_sg()
509 */
510struct page *
511__i915_gem_object_get_page(struct drm_i915_gem_object *obj, pgoff_t n);
512
513/**
514 * i915_gem_object_get_page - wrapper macro for __i915_gem_object_get_page
515 * @obj: i915 GEM buffer object
516 * @n: page offset
517 *
518 * Returns:
519 * The target page pointer.
520 *
521 * In order to avoid the truncation of the input parameter, it checks the page
522 * offset n's type from the input parameter before calling
523 * __i915_gem_object_get_page().
524 * See also __i915_gem_object_page_iter_get_sg()
525 */
526#define i915_gem_object_get_page(obj, n) ({ \
527 static_assert(castable_to_type(n, pgoff_t)); \
528 __i915_gem_object_get_page(obj, n); \
529})
530
531/**
532 * __i915_gem_object_get_dirty_page - helper to find the target page with a page
533 * offset
534 * @obj: i915 GEM buffer object
535 * @n: page offset
536 *
537 * It works like i915_gem_object_get_page(), but it marks the returned page dirty.
538 *
539 * Returns:
540 * The target page pointer.
541 *
542 * Recommended to use wrapper macro: i915_gem_object_get_dirty_page()
543 * See also __i915_gem_object_page_iter_get_sg() and __i915_gem_object_get_page()
544 */
545struct page *
546__i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj, pgoff_t n);
547
548/**
549 * i915_gem_object_get_dirty_page - wrapper macro for __i915_gem_object_get_dirty_page
550 * @obj: i915 GEM buffer object
551 * @n: page offset
552 *
553 * Returns:
554 * The target page pointer.
555 *
556 * In order to avoid the truncation of the input parameter, it checks the page
557 * offset n's type from the input parameter before calling
558 * __i915_gem_object_get_dirty_page().
559 * See also __i915_gem_object_page_iter_get_sg() and __i915_gem_object_get_page()
560 */
561#define i915_gem_object_get_dirty_page(obj, n) ({ \
562 static_assert(castable_to_type(n, pgoff_t)); \
563 __i915_gem_object_get_dirty_page(obj, n); \
564})
565
566/**
567 * __i915_gem_object_get_dma_address_len - helper to get bus addresses of
568 * targeted DMA mapped scatterlist from i915 GEM buffer object and it's length
569 * @obj: i915 GEM buffer object
570 * @n: page offset
571 * @len: DMA mapped scatterlist's DMA bus addresses length to return
572 *
573 * Returns:
574 * Bus addresses of targeted DMA mapped scatterlist
575 *
576 * Recommended to use wrapper macro: i915_gem_object_get_dma_address_len()
577 * See also __i915_gem_object_page_iter_get_sg() and __i915_gem_object_get_sg_dma()
578 */
579dma_addr_t
580__i915_gem_object_get_dma_address_len(struct drm_i915_gem_object *obj, pgoff_t n,
581 unsigned int *len);
582
583/**
584 * i915_gem_object_get_dma_address_len - wrapper macro for
585 * __i915_gem_object_get_dma_address_len
586 * @obj: i915 GEM buffer object
587 * @n: page offset
588 * @len: DMA mapped scatterlist's DMA bus addresses length to return
589 *
590 * Returns:
591 * Bus addresses of targeted DMA mapped scatterlist
592 *
593 * In order to avoid the truncation of the input parameter, it checks the page
594 * offset n's type from the input parameter before calling
595 * __i915_gem_object_get_dma_address_len().
596 * See also __i915_gem_object_page_iter_get_sg() and
597 * __i915_gem_object_get_dma_address_len()
598 */
599#define i915_gem_object_get_dma_address_len(obj, n, len) ({ \
600 static_assert(castable_to_type(n, pgoff_t)); \
601 __i915_gem_object_get_dma_address_len(obj, n, len); \
602})
603
604/**
605 * __i915_gem_object_get_dma_address - helper to get bus addresses of
606 * targeted DMA mapped scatterlist from i915 GEM buffer object
607 * @obj: i915 GEM buffer object
608 * @n: page offset
609 *
610 * Returns:
611 * Bus addresses of targeted DMA mapped scatterlis
612 *
613 * Recommended to use wrapper macro: i915_gem_object_get_dma_address()
614 * See also __i915_gem_object_page_iter_get_sg() and __i915_gem_object_get_sg_dma()
615 */
616dma_addr_t
617__i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj, pgoff_t n);
618
619/**
620 * i915_gem_object_get_dma_address - wrapper macro for
621 * __i915_gem_object_get_dma_address
622 * @obj: i915 GEM buffer object
623 * @n: page offset
624 *
625 * Returns:
626 * Bus addresses of targeted DMA mapped scatterlist
627 *
628 * In order to avoid the truncation of the input parameter, it checks the page
629 * offset n's type from the input parameter before calling
630 * __i915_gem_object_get_dma_address().
631 * See also __i915_gem_object_page_iter_get_sg() and
632 * __i915_gem_object_get_dma_address()
633 */
634#define i915_gem_object_get_dma_address(obj, n) ({ \
635 static_assert(castable_to_type(n, pgoff_t)); \
636 __i915_gem_object_get_dma_address(obj, n); \
637})
638
639void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
640 struct sg_table *pages);
641
642int ____i915_gem_object_get_pages(struct drm_i915_gem_object *obj);
643int __i915_gem_object_get_pages(struct drm_i915_gem_object *obj);
644
645static inline int __must_check
646i915_gem_object_pin_pages(struct drm_i915_gem_object *obj)
647{
648 assert_object_held(obj);
649
650 if (atomic_inc_not_zero(v: &obj->mm.pages_pin_count))
651 return 0;
652
653 return __i915_gem_object_get_pages(obj);
654}
655
656int i915_gem_object_pin_pages_unlocked(struct drm_i915_gem_object *obj);
657
658static inline bool
659i915_gem_object_has_pages(struct drm_i915_gem_object *obj)
660{
661 return !IS_ERR_OR_NULL(READ_ONCE(obj->mm.pages));
662}
663
664static inline void
665__i915_gem_object_pin_pages(struct drm_i915_gem_object *obj)
666{
667 GEM_BUG_ON(!i915_gem_object_has_pages(obj));
668
669 atomic_inc(v: &obj->mm.pages_pin_count);
670}
671
672static inline bool
673i915_gem_object_has_pinned_pages(struct drm_i915_gem_object *obj)
674{
675 return atomic_read(v: &obj->mm.pages_pin_count);
676}
677
678static inline void
679__i915_gem_object_unpin_pages(struct drm_i915_gem_object *obj)
680{
681 GEM_BUG_ON(!i915_gem_object_has_pages(obj));
682 GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj));
683
684 atomic_dec(v: &obj->mm.pages_pin_count);
685}
686
687static inline void
688i915_gem_object_unpin_pages(struct drm_i915_gem_object *obj)
689{
690 __i915_gem_object_unpin_pages(obj);
691}
692
693int __i915_gem_object_put_pages(struct drm_i915_gem_object *obj);
694int i915_gem_object_truncate(struct drm_i915_gem_object *obj);
695
696struct intel_panic *i915_gem_object_alloc_panic(void);
697int i915_gem_object_panic_setup(struct intel_panic *panic, struct drm_scanout_buffer *sb,
698 struct drm_gem_object *_obj, bool panic_tiling);
699void i915_gem_object_panic_finish(struct intel_panic *panic);
700
701/**
702 * i915_gem_object_pin_map - return a contiguous mapping of the entire object
703 * @obj: the object to map into kernel address space
704 * @type: the type of mapping, used to select pgprot_t
705 *
706 * Calls i915_gem_object_pin_pages() to prevent reaping of the object's
707 * pages and then returns a contiguous mapping of the backing storage into
708 * the kernel address space. Based on the @type of mapping, the PTE will be
709 * set to either WriteBack or WriteCombine (via pgprot_t).
710 *
711 * The caller is responsible for calling i915_gem_object_unpin_map() when the
712 * mapping is no longer required.
713 *
714 * Returns the pointer through which to access the mapped object, or an
715 * ERR_PTR() on error.
716 */
717void *__must_check i915_gem_object_pin_map(struct drm_i915_gem_object *obj,
718 enum i915_map_type type);
719
720void *__must_check i915_gem_object_pin_map_unlocked(struct drm_i915_gem_object *obj,
721 enum i915_map_type type);
722
723void __i915_gem_object_flush_map(struct drm_i915_gem_object *obj,
724 unsigned long offset,
725 unsigned long size);
726static inline void i915_gem_object_flush_map(struct drm_i915_gem_object *obj)
727{
728 __i915_gem_object_flush_map(obj, offset: 0, size: obj->base.size);
729}
730
731/**
732 * i915_gem_object_unpin_map - releases an earlier mapping
733 * @obj: the object to unmap
734 *
735 * After pinning the object and mapping its pages, once you are finished
736 * with your access, call i915_gem_object_unpin_map() to release the pin
737 * upon the mapping. Once the pin count reaches zero, that mapping may be
738 * removed.
739 */
740static inline void i915_gem_object_unpin_map(struct drm_i915_gem_object *obj)
741{
742 i915_gem_object_unpin_pages(obj);
743}
744
745void __i915_gem_object_release_map(struct drm_i915_gem_object *obj);
746
747int i915_gem_object_prepare_read(struct drm_i915_gem_object *obj,
748 unsigned int *needs_clflush);
749int i915_gem_object_prepare_write(struct drm_i915_gem_object *obj,
750 unsigned int *needs_clflush);
751#define CLFLUSH_BEFORE BIT(0)
752#define CLFLUSH_AFTER BIT(1)
753#define CLFLUSH_FLAGS (CLFLUSH_BEFORE | CLFLUSH_AFTER)
754
755static inline void
756i915_gem_object_finish_access(struct drm_i915_gem_object *obj)
757{
758 i915_gem_object_unpin_pages(obj);
759}
760
761int i915_gem_object_get_moving_fence(struct drm_i915_gem_object *obj,
762 struct dma_fence **fence);
763int i915_gem_object_wait_moving_fence(struct drm_i915_gem_object *obj,
764 bool intr);
765bool i915_gem_object_has_unknown_state(struct drm_i915_gem_object *obj);
766
767void i915_gem_object_set_cache_coherency(struct drm_i915_gem_object *obj,
768 unsigned int cache_level);
769void i915_gem_object_set_pat_index(struct drm_i915_gem_object *obj,
770 unsigned int pat_index);
771bool i915_gem_object_can_bypass_llc(struct drm_i915_gem_object *obj);
772void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj);
773void i915_gem_object_flush_if_display_locked(struct drm_i915_gem_object *obj);
774bool i915_gem_cpu_write_needs_clflush(struct drm_i915_gem_object *obj);
775
776int __must_check
777i915_gem_object_set_to_wc_domain(struct drm_i915_gem_object *obj, bool write);
778int __must_check
779i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write);
780int __must_check
781i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write);
782struct i915_vma * __must_check
783i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
784 struct i915_gem_ww_ctx *ww,
785 u32 alignment, unsigned int guard,
786 const struct i915_gtt_view *view,
787 unsigned int flags);
788
789void i915_gem_object_make_unshrinkable(struct drm_i915_gem_object *obj);
790void i915_gem_object_make_shrinkable(struct drm_i915_gem_object *obj);
791void __i915_gem_object_make_shrinkable(struct drm_i915_gem_object *obj);
792void __i915_gem_object_make_purgeable(struct drm_i915_gem_object *obj);
793void i915_gem_object_make_purgeable(struct drm_i915_gem_object *obj);
794
795static inline void __start_cpu_write(struct drm_i915_gem_object *obj)
796{
797 obj->read_domains = I915_GEM_DOMAIN_CPU;
798 obj->write_domain = I915_GEM_DOMAIN_CPU;
799 if (i915_gem_cpu_write_needs_clflush(obj))
800 obj->cache_dirty = true;
801}
802
803void i915_gem_fence_wait_priority(struct dma_fence *fence,
804 const struct i915_sched_attr *attr);
805void i915_gem_fence_wait_priority_display(struct dma_fence *fence);
806
807int i915_gem_object_wait(struct drm_i915_gem_object *obj,
808 unsigned int flags,
809 long timeout);
810int i915_gem_object_wait_priority(struct drm_i915_gem_object *obj,
811 unsigned int flags,
812 const struct i915_sched_attr *attr);
813
814int i915_gem_object_read_from_page(struct drm_i915_gem_object *obj, u64 offset, void *dst, int size);
815
816bool i915_gem_object_is_shmem(const struct drm_i915_gem_object *obj);
817
818void __i915_gem_free_object_rcu(struct rcu_head *head);
819
820void __i915_gem_object_pages_fini(struct drm_i915_gem_object *obj);
821
822void __i915_gem_free_object(struct drm_i915_gem_object *obj);
823
824bool i915_gem_object_evictable(struct drm_i915_gem_object *obj);
825
826bool i915_gem_object_migratable(struct drm_i915_gem_object *obj);
827
828int i915_gem_object_migrate(struct drm_i915_gem_object *obj,
829 struct i915_gem_ww_ctx *ww,
830 enum intel_region_id id);
831int __i915_gem_object_migrate(struct drm_i915_gem_object *obj,
832 struct i915_gem_ww_ctx *ww,
833 enum intel_region_id id,
834 unsigned int flags);
835
836bool i915_gem_object_can_migrate(struct drm_i915_gem_object *obj,
837 enum intel_region_id id);
838
839int i915_gem_object_wait_migration(struct drm_i915_gem_object *obj,
840 unsigned int flags);
841
842bool i915_gem_object_placement_possible(struct drm_i915_gem_object *obj,
843 enum intel_memory_type type);
844
845bool i915_gem_object_needs_ccs_pages(struct drm_i915_gem_object *obj);
846
847int shmem_sg_alloc_table(struct drm_i915_private *i915, struct sg_table *st,
848 size_t size, struct intel_memory_region *mr,
849 struct address_space *mapping,
850 unsigned int max_segment);
851void shmem_sg_free_table(struct sg_table *st, struct address_space *mapping,
852 bool dirty, bool backup);
853void __shmem_writeback(size_t size, struct address_space *mapping);
854
855#ifdef CONFIG_MMU_NOTIFIER
856static inline bool
857i915_gem_object_is_userptr(struct drm_i915_gem_object *obj)
858{
859 return obj->userptr.notifier.mm;
860}
861
862int i915_gem_object_userptr_submit_init(struct drm_i915_gem_object *obj);
863int i915_gem_object_userptr_submit_done(struct drm_i915_gem_object *obj);
864int i915_gem_object_userptr_validate(struct drm_i915_gem_object *obj);
865#else
866static inline bool i915_gem_object_is_userptr(struct drm_i915_gem_object *obj) { return false; }
867
868static inline int i915_gem_object_userptr_submit_init(struct drm_i915_gem_object *obj) { GEM_BUG_ON(1); return -ENODEV; }
869static inline int i915_gem_object_userptr_submit_done(struct drm_i915_gem_object *obj) { GEM_BUG_ON(1); return -ENODEV; }
870static inline int i915_gem_object_userptr_validate(struct drm_i915_gem_object *obj) { GEM_BUG_ON(1); return -ENODEV; }
871
872#endif
873
874#endif
875

source code of linux/drivers/gpu/drm/i915/gem/i915_gem_object.h