2 * Copyright © 2008 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eric Anholt <eric@anholt.net>
32 #include "i915_trace.h"
33 #include "intel_drv.h"
34 #include <linux/shmem_fs.h>
35 #include <linux/slab.h>
36 #include <linux/swap.h>
37 #include <linux/pci.h>
38 #include <linux/dma-buf.h>
40 static __must_check
int i915_gem_object_flush_gpu_write_domain(struct drm_i915_gem_object
*obj
);
41 static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
);
42 static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
);
43 static __must_check
int i915_gem_object_bind_to_gtt(struct drm_i915_gem_object
*obj
,
45 bool map_and_fenceable
);
46 static int i915_gem_phys_pwrite(struct drm_device
*dev
,
47 struct drm_i915_gem_object
*obj
,
48 struct drm_i915_gem_pwrite
*args
,
49 struct drm_file
*file
);
51 static void i915_gem_write_fence(struct drm_device
*dev
, int reg
,
52 struct drm_i915_gem_object
*obj
);
53 static void i915_gem_object_update_fence(struct drm_i915_gem_object
*obj
,
54 struct drm_i915_fence_reg
*fence
,
57 static int i915_gem_inactive_shrink(struct shrinker
*shrinker
,
58 struct shrink_control
*sc
);
59 static void i915_gem_object_truncate(struct drm_i915_gem_object
*obj
);
61 static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object
*obj
)
64 i915_gem_release_mmap(obj
);
66 /* As we do not have an associated fence register, we will force
67 * a tiling change if we ever need to acquire one.
69 obj
->fence_dirty
= false;
70 obj
->fence_reg
= I915_FENCE_REG_NONE
;
73 /* some bookkeeping */
74 static void i915_gem_info_add_obj(struct drm_i915_private
*dev_priv
,
77 dev_priv
->mm
.object_count
++;
78 dev_priv
->mm
.object_memory
+= size
;
81 static void i915_gem_info_remove_obj(struct drm_i915_private
*dev_priv
,
84 dev_priv
->mm
.object_count
--;
85 dev_priv
->mm
.object_memory
-= size
;
89 i915_gem_wait_for_error(struct drm_device
*dev
)
91 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
92 struct completion
*x
= &dev_priv
->error_completion
;
96 if (!atomic_read(&dev_priv
->mm
.wedged
))
100 * Only wait 10 seconds for the gpu reset to complete to avoid hanging
101 * userspace. If it takes that long something really bad is going on and
102 * we should simply try to bail out and fail as gracefully as possible.
104 ret
= wait_for_completion_interruptible_timeout(x
, 10*HZ
);
106 DRM_ERROR("Timed out waiting for the gpu reset to complete\n");
108 } else if (ret
< 0) {
112 if (atomic_read(&dev_priv
->mm
.wedged
)) {
113 /* GPU is hung, bump the completion count to account for
114 * the token we just consumed so that we never hit zero and
115 * end up waiting upon a subsequent completion event that
118 spin_lock_irqsave(&x
->wait
.lock
, flags
);
120 spin_unlock_irqrestore(&x
->wait
.lock
, flags
);
125 int i915_mutex_lock_interruptible(struct drm_device
*dev
)
129 ret
= i915_gem_wait_for_error(dev
);
133 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
137 WARN_ON(i915_verify_lists(dev
));
142 i915_gem_object_is_inactive(struct drm_i915_gem_object
*obj
)
148 i915_gem_init_ioctl(struct drm_device
*dev
, void *data
,
149 struct drm_file
*file
)
151 struct drm_i915_gem_init
*args
= data
;
153 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
156 if (args
->gtt_start
>= args
->gtt_end
||
157 (args
->gtt_end
| args
->gtt_start
) & (PAGE_SIZE
- 1))
160 /* GEM with user mode setting was never supported on ilk and later. */
161 if (INTEL_INFO(dev
)->gen
>= 5)
164 mutex_lock(&dev
->struct_mutex
);
165 i915_gem_init_global_gtt(dev
, args
->gtt_start
,
166 args
->gtt_end
, args
->gtt_end
);
167 mutex_unlock(&dev
->struct_mutex
);
173 i915_gem_get_aperture_ioctl(struct drm_device
*dev
, void *data
,
174 struct drm_file
*file
)
176 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
177 struct drm_i915_gem_get_aperture
*args
= data
;
178 struct drm_i915_gem_object
*obj
;
182 mutex_lock(&dev
->struct_mutex
);
183 list_for_each_entry(obj
, &dev_priv
->mm
.gtt_list
, gtt_list
)
185 pinned
+= obj
->gtt_space
->size
;
186 mutex_unlock(&dev
->struct_mutex
);
188 args
->aper_size
= dev_priv
->mm
.gtt_total
;
189 args
->aper_available_size
= args
->aper_size
- pinned
;
195 i915_gem_create(struct drm_file
*file
,
196 struct drm_device
*dev
,
200 struct drm_i915_gem_object
*obj
;
204 size
= roundup(size
, PAGE_SIZE
);
208 /* Allocate the new object */
209 obj
= i915_gem_alloc_object(dev
, size
);
213 ret
= drm_gem_handle_create(file
, &obj
->base
, &handle
);
215 drm_gem_object_release(&obj
->base
);
216 i915_gem_info_remove_obj(dev
->dev_private
, obj
->base
.size
);
221 /* drop reference from allocate - handle holds it now */
222 drm_gem_object_unreference(&obj
->base
);
223 trace_i915_gem_object_create(obj
);
230 i915_gem_dumb_create(struct drm_file
*file
,
231 struct drm_device
*dev
,
232 struct drm_mode_create_dumb
*args
)
234 /* have to work out size/pitch and return them */
235 args
->pitch
= ALIGN(args
->width
* ((args
->bpp
+ 7) / 8), 64);
236 args
->size
= args
->pitch
* args
->height
;
237 return i915_gem_create(file
, dev
,
238 args
->size
, &args
->handle
);
241 int i915_gem_dumb_destroy(struct drm_file
*file
,
242 struct drm_device
*dev
,
245 return drm_gem_handle_delete(file
, handle
);
249 * Creates a new mm object and returns a handle to it.
252 i915_gem_create_ioctl(struct drm_device
*dev
, void *data
,
253 struct drm_file
*file
)
255 struct drm_i915_gem_create
*args
= data
;
257 return i915_gem_create(file
, dev
,
258 args
->size
, &args
->handle
);
261 static int i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object
*obj
)
263 drm_i915_private_t
*dev_priv
= obj
->base
.dev
->dev_private
;
265 return dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_9_10_17
&&
266 obj
->tiling_mode
!= I915_TILING_NONE
;
270 __copy_to_user_swizzled(char __user
*cpu_vaddr
,
271 const char *gpu_vaddr
, int gpu_offset
,
274 int ret
, cpu_offset
= 0;
277 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
278 int this_length
= min(cacheline_end
- gpu_offset
, length
);
279 int swizzled_gpu_offset
= gpu_offset
^ 64;
281 ret
= __copy_to_user(cpu_vaddr
+ cpu_offset
,
282 gpu_vaddr
+ swizzled_gpu_offset
,
287 cpu_offset
+= this_length
;
288 gpu_offset
+= this_length
;
289 length
-= this_length
;
296 __copy_from_user_swizzled(char *gpu_vaddr
, int gpu_offset
,
297 const char __user
*cpu_vaddr
,
300 int ret
, cpu_offset
= 0;
303 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
304 int this_length
= min(cacheline_end
- gpu_offset
, length
);
305 int swizzled_gpu_offset
= gpu_offset
^ 64;
307 ret
= __copy_from_user(gpu_vaddr
+ swizzled_gpu_offset
,
308 cpu_vaddr
+ cpu_offset
,
313 cpu_offset
+= this_length
;
314 gpu_offset
+= this_length
;
315 length
-= this_length
;
321 /* Per-page copy function for the shmem pread fastpath.
322 * Flushes invalid cachelines before reading the target if
323 * needs_clflush is set. */
325 shmem_pread_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
326 char __user
*user_data
,
327 bool page_do_bit17_swizzling
, bool needs_clflush
)
332 if (unlikely(page_do_bit17_swizzling
))
335 vaddr
= kmap_atomic(page
);
337 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
339 ret
= __copy_to_user_inatomic(user_data
,
340 vaddr
+ shmem_page_offset
,
342 kunmap_atomic(vaddr
);
348 shmem_clflush_swizzled_range(char *addr
, unsigned long length
,
351 if (unlikely(swizzled
)) {
352 unsigned long start
= (unsigned long) addr
;
353 unsigned long end
= (unsigned long) addr
+ length
;
355 /* For swizzling simply ensure that we always flush both
356 * channels. Lame, but simple and it works. Swizzled
357 * pwrite/pread is far from a hotpath - current userspace
358 * doesn't use it at all. */
359 start
= round_down(start
, 128);
360 end
= round_up(end
, 128);
362 drm_clflush_virt_range((void *)start
, end
- start
);
364 drm_clflush_virt_range(addr
, length
);
369 /* Only difference to the fast-path function is that this can handle bit17
370 * and uses non-atomic copy and kmap functions. */
372 shmem_pread_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
373 char __user
*user_data
,
374 bool page_do_bit17_swizzling
, bool needs_clflush
)
381 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
383 page_do_bit17_swizzling
);
385 if (page_do_bit17_swizzling
)
386 ret
= __copy_to_user_swizzled(user_data
,
387 vaddr
, shmem_page_offset
,
390 ret
= __copy_to_user(user_data
,
391 vaddr
+ shmem_page_offset
,
399 i915_gem_shmem_pread(struct drm_device
*dev
,
400 struct drm_i915_gem_object
*obj
,
401 struct drm_i915_gem_pread
*args
,
402 struct drm_file
*file
)
404 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
405 char __user
*user_data
;
408 int shmem_page_offset
, page_length
, ret
= 0;
409 int obj_do_bit17_swizzling
, page_do_bit17_swizzling
;
410 int hit_slowpath
= 0;
412 int needs_clflush
= 0;
415 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
418 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
420 if (!(obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
)) {
421 /* If we're not in the cpu read domain, set ourself into the gtt
422 * read domain and manually flush cachelines (if required). This
423 * optimizes for the case when the gpu will dirty the data
424 * anyway again before the next pread happens. */
425 if (obj
->cache_level
== I915_CACHE_NONE
)
427 ret
= i915_gem_object_set_to_gtt_domain(obj
, false);
432 offset
= args
->offset
;
437 /* Operation in this page
439 * shmem_page_offset = offset within page in shmem file
440 * page_length = bytes to copy for this page
442 shmem_page_offset
= offset_in_page(offset
);
443 page_length
= remain
;
444 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
445 page_length
= PAGE_SIZE
- shmem_page_offset
;
448 page
= obj
->pages
[offset
>> PAGE_SHIFT
];
451 page
= shmem_read_mapping_page(mapping
, offset
>> PAGE_SHIFT
);
459 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
460 (page_to_phys(page
) & (1 << 17)) != 0;
462 ret
= shmem_pread_fast(page
, shmem_page_offset
, page_length
,
463 user_data
, page_do_bit17_swizzling
,
469 page_cache_get(page
);
470 mutex_unlock(&dev
->struct_mutex
);
473 ret
= fault_in_multipages_writeable(user_data
, remain
);
474 /* Userspace is tricking us, but we've already clobbered
475 * its pages with the prefault and promised to write the
476 * data up to the first fault. Hence ignore any errors
477 * and just continue. */
482 ret
= shmem_pread_slow(page
, shmem_page_offset
, page_length
,
483 user_data
, page_do_bit17_swizzling
,
486 mutex_lock(&dev
->struct_mutex
);
487 page_cache_release(page
);
489 mark_page_accessed(page
);
491 page_cache_release(page
);
498 remain
-= page_length
;
499 user_data
+= page_length
;
500 offset
+= page_length
;
505 /* Fixup: Kill any reinstated backing storage pages */
506 if (obj
->madv
== __I915_MADV_PURGED
)
507 i915_gem_object_truncate(obj
);
514 * Reads data from the object referenced by handle.
516 * On error, the contents of *data are undefined.
519 i915_gem_pread_ioctl(struct drm_device
*dev
, void *data
,
520 struct drm_file
*file
)
522 struct drm_i915_gem_pread
*args
= data
;
523 struct drm_i915_gem_object
*obj
;
529 if (!access_ok(VERIFY_WRITE
,
530 (char __user
*)(uintptr_t)args
->data_ptr
,
534 ret
= i915_mutex_lock_interruptible(dev
);
538 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
539 if (&obj
->base
== NULL
) {
544 /* Bounds check source. */
545 if (args
->offset
> obj
->base
.size
||
546 args
->size
> obj
->base
.size
- args
->offset
) {
551 /* prime objects have no backing filp to GEM pread/pwrite
554 if (!obj
->base
.filp
) {
559 trace_i915_gem_object_pread(obj
, args
->offset
, args
->size
);
561 ret
= i915_gem_shmem_pread(dev
, obj
, args
, file
);
564 drm_gem_object_unreference(&obj
->base
);
566 mutex_unlock(&dev
->struct_mutex
);
570 /* This is the fast write path which cannot handle
571 * page faults in the source data
575 fast_user_write(struct io_mapping
*mapping
,
576 loff_t page_base
, int page_offset
,
577 char __user
*user_data
,
580 void __iomem
*vaddr_atomic
;
582 unsigned long unwritten
;
584 vaddr_atomic
= io_mapping_map_atomic_wc(mapping
, page_base
);
585 /* We can use the cpu mem copy function because this is X86. */
586 vaddr
= (void __force
*)vaddr_atomic
+ page_offset
;
587 unwritten
= __copy_from_user_inatomic_nocache(vaddr
,
589 io_mapping_unmap_atomic(vaddr_atomic
);
594 * This is the fast pwrite path, where we copy the data directly from the
595 * user into the GTT, uncached.
598 i915_gem_gtt_pwrite_fast(struct drm_device
*dev
,
599 struct drm_i915_gem_object
*obj
,
600 struct drm_i915_gem_pwrite
*args
,
601 struct drm_file
*file
)
603 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
605 loff_t offset
, page_base
;
606 char __user
*user_data
;
607 int page_offset
, page_length
, ret
;
609 ret
= i915_gem_object_pin(obj
, 0, true);
613 ret
= i915_gem_object_set_to_gtt_domain(obj
, true);
617 ret
= i915_gem_object_put_fence(obj
);
621 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
624 offset
= obj
->gtt_offset
+ args
->offset
;
627 /* Operation in this page
629 * page_base = page offset within aperture
630 * page_offset = offset within page
631 * page_length = bytes to copy for this page
633 page_base
= offset
& PAGE_MASK
;
634 page_offset
= offset_in_page(offset
);
635 page_length
= remain
;
636 if ((page_offset
+ remain
) > PAGE_SIZE
)
637 page_length
= PAGE_SIZE
- page_offset
;
639 /* If we get a fault while copying data, then (presumably) our
640 * source page isn't available. Return the error and we'll
641 * retry in the slow path.
643 if (fast_user_write(dev_priv
->mm
.gtt_mapping
, page_base
,
644 page_offset
, user_data
, page_length
)) {
649 remain
-= page_length
;
650 user_data
+= page_length
;
651 offset
+= page_length
;
655 i915_gem_object_unpin(obj
);
660 /* Per-page copy function for the shmem pwrite fastpath.
661 * Flushes invalid cachelines before writing to the target if
662 * needs_clflush_before is set and flushes out any written cachelines after
663 * writing if needs_clflush is set. */
665 shmem_pwrite_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
666 char __user
*user_data
,
667 bool page_do_bit17_swizzling
,
668 bool needs_clflush_before
,
669 bool needs_clflush_after
)
674 if (unlikely(page_do_bit17_swizzling
))
677 vaddr
= kmap_atomic(page
);
678 if (needs_clflush_before
)
679 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
681 ret
= __copy_from_user_inatomic_nocache(vaddr
+ shmem_page_offset
,
684 if (needs_clflush_after
)
685 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
687 kunmap_atomic(vaddr
);
692 /* Only difference to the fast-path function is that this can handle bit17
693 * and uses non-atomic copy and kmap functions. */
695 shmem_pwrite_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
696 char __user
*user_data
,
697 bool page_do_bit17_swizzling
,
698 bool needs_clflush_before
,
699 bool needs_clflush_after
)
705 if (unlikely(needs_clflush_before
|| page_do_bit17_swizzling
))
706 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
708 page_do_bit17_swizzling
);
709 if (page_do_bit17_swizzling
)
710 ret
= __copy_from_user_swizzled(vaddr
, shmem_page_offset
,
714 ret
= __copy_from_user(vaddr
+ shmem_page_offset
,
717 if (needs_clflush_after
)
718 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
720 page_do_bit17_swizzling
);
727 i915_gem_shmem_pwrite(struct drm_device
*dev
,
728 struct drm_i915_gem_object
*obj
,
729 struct drm_i915_gem_pwrite
*args
,
730 struct drm_file
*file
)
732 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
735 char __user
*user_data
;
736 int shmem_page_offset
, page_length
, ret
= 0;
737 int obj_do_bit17_swizzling
, page_do_bit17_swizzling
;
738 int hit_slowpath
= 0;
739 int needs_clflush_after
= 0;
740 int needs_clflush_before
= 0;
743 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
746 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
748 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
749 /* If we're not in the cpu write domain, set ourself into the gtt
750 * write domain and manually flush cachelines (if required). This
751 * optimizes for the case when the gpu will use the data
752 * right away and we therefore have to clflush anyway. */
753 if (obj
->cache_level
== I915_CACHE_NONE
)
754 needs_clflush_after
= 1;
755 ret
= i915_gem_object_set_to_gtt_domain(obj
, true);
759 /* Same trick applies for invalidate partially written cachelines before
761 if (!(obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
)
762 && obj
->cache_level
== I915_CACHE_NONE
)
763 needs_clflush_before
= 1;
765 offset
= args
->offset
;
770 int partial_cacheline_write
;
772 /* Operation in this page
774 * shmem_page_offset = offset within page in shmem file
775 * page_length = bytes to copy for this page
777 shmem_page_offset
= offset_in_page(offset
);
779 page_length
= remain
;
780 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
781 page_length
= PAGE_SIZE
- shmem_page_offset
;
783 /* If we don't overwrite a cacheline completely we need to be
784 * careful to have up-to-date data by first clflushing. Don't
785 * overcomplicate things and flush the entire patch. */
786 partial_cacheline_write
= needs_clflush_before
&&
787 ((shmem_page_offset
| page_length
)
788 & (boot_cpu_data
.x86_clflush_size
- 1));
791 page
= obj
->pages
[offset
>> PAGE_SHIFT
];
794 page
= shmem_read_mapping_page(mapping
, offset
>> PAGE_SHIFT
);
802 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
803 (page_to_phys(page
) & (1 << 17)) != 0;
805 ret
= shmem_pwrite_fast(page
, shmem_page_offset
, page_length
,
806 user_data
, page_do_bit17_swizzling
,
807 partial_cacheline_write
,
808 needs_clflush_after
);
813 page_cache_get(page
);
814 mutex_unlock(&dev
->struct_mutex
);
816 ret
= shmem_pwrite_slow(page
, shmem_page_offset
, page_length
,
817 user_data
, page_do_bit17_swizzling
,
818 partial_cacheline_write
,
819 needs_clflush_after
);
821 mutex_lock(&dev
->struct_mutex
);
822 page_cache_release(page
);
824 set_page_dirty(page
);
825 mark_page_accessed(page
);
827 page_cache_release(page
);
834 remain
-= page_length
;
835 user_data
+= page_length
;
836 offset
+= page_length
;
841 /* Fixup: Kill any reinstated backing storage pages */
842 if (obj
->madv
== __I915_MADV_PURGED
)
843 i915_gem_object_truncate(obj
);
844 /* and flush dirty cachelines in case the object isn't in the cpu write
846 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
847 i915_gem_clflush_object(obj
);
848 intel_gtt_chipset_flush();
852 if (needs_clflush_after
)
853 intel_gtt_chipset_flush();
859 * Writes data to the object referenced by handle.
861 * On error, the contents of the buffer that were to be modified are undefined.
864 i915_gem_pwrite_ioctl(struct drm_device
*dev
, void *data
,
865 struct drm_file
*file
)
867 struct drm_i915_gem_pwrite
*args
= data
;
868 struct drm_i915_gem_object
*obj
;
874 if (!access_ok(VERIFY_READ
,
875 (char __user
*)(uintptr_t)args
->data_ptr
,
879 ret
= fault_in_multipages_readable((char __user
*)(uintptr_t)args
->data_ptr
,
884 ret
= i915_mutex_lock_interruptible(dev
);
888 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
889 if (&obj
->base
== NULL
) {
894 /* Bounds check destination. */
895 if (args
->offset
> obj
->base
.size
||
896 args
->size
> obj
->base
.size
- args
->offset
) {
901 /* prime objects have no backing filp to GEM pread/pwrite
904 if (!obj
->base
.filp
) {
909 trace_i915_gem_object_pwrite(obj
, args
->offset
, args
->size
);
912 /* We can only do the GTT pwrite on untiled buffers, as otherwise
913 * it would end up going through the fenced access, and we'll get
914 * different detiling behavior between reading and writing.
915 * pread/pwrite currently are reading and writing from the CPU
916 * perspective, requiring manual detiling by the client.
919 ret
= i915_gem_phys_pwrite(dev
, obj
, args
, file
);
923 if (obj
->gtt_space
&&
924 obj
->cache_level
== I915_CACHE_NONE
&&
925 obj
->tiling_mode
== I915_TILING_NONE
&&
926 obj
->map_and_fenceable
&&
927 obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
928 ret
= i915_gem_gtt_pwrite_fast(dev
, obj
, args
, file
);
929 /* Note that the gtt paths might fail with non-page-backed user
930 * pointers (e.g. gtt mappings when moving data between
931 * textures). Fallback to the shmem path in that case. */
935 ret
= i915_gem_shmem_pwrite(dev
, obj
, args
, file
);
938 drm_gem_object_unreference(&obj
->base
);
940 mutex_unlock(&dev
->struct_mutex
);
945 * Called when user space prepares to use an object with the CPU, either
946 * through the mmap ioctl's mapping or a GTT mapping.
949 i915_gem_set_domain_ioctl(struct drm_device
*dev
, void *data
,
950 struct drm_file
*file
)
952 struct drm_i915_gem_set_domain
*args
= data
;
953 struct drm_i915_gem_object
*obj
;
954 uint32_t read_domains
= args
->read_domains
;
955 uint32_t write_domain
= args
->write_domain
;
958 /* Only handle setting domains to types used by the CPU. */
959 if (write_domain
& I915_GEM_GPU_DOMAINS
)
962 if (read_domains
& I915_GEM_GPU_DOMAINS
)
965 /* Having something in the write domain implies it's in the read
966 * domain, and only that read domain. Enforce that in the request.
968 if (write_domain
!= 0 && read_domains
!= write_domain
)
971 ret
= i915_mutex_lock_interruptible(dev
);
975 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
976 if (&obj
->base
== NULL
) {
981 if (read_domains
& I915_GEM_DOMAIN_GTT
) {
982 ret
= i915_gem_object_set_to_gtt_domain(obj
, write_domain
!= 0);
984 /* Silently promote "you're not bound, there was nothing to do"
985 * to success, since the client was just asking us to
986 * make sure everything was done.
991 ret
= i915_gem_object_set_to_cpu_domain(obj
, write_domain
!= 0);
994 drm_gem_object_unreference(&obj
->base
);
996 mutex_unlock(&dev
->struct_mutex
);
1001 * Called when user space has done writes to this buffer
1004 i915_gem_sw_finish_ioctl(struct drm_device
*dev
, void *data
,
1005 struct drm_file
*file
)
1007 struct drm_i915_gem_sw_finish
*args
= data
;
1008 struct drm_i915_gem_object
*obj
;
1011 ret
= i915_mutex_lock_interruptible(dev
);
1015 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1016 if (&obj
->base
== NULL
) {
1021 /* Pinned buffers may be scanout, so flush the cache */
1023 i915_gem_object_flush_cpu_write_domain(obj
);
1025 drm_gem_object_unreference(&obj
->base
);
1027 mutex_unlock(&dev
->struct_mutex
);
1032 * Maps the contents of an object, returning the address it is mapped
1035 * While the mapping holds a reference on the contents of the object, it doesn't
1036 * imply a ref on the object itself.
1039 i915_gem_mmap_ioctl(struct drm_device
*dev
, void *data
,
1040 struct drm_file
*file
)
1042 struct drm_i915_gem_mmap
*args
= data
;
1043 struct drm_gem_object
*obj
;
1046 obj
= drm_gem_object_lookup(dev
, file
, args
->handle
);
1050 /* prime objects have no backing filp to GEM mmap
1054 drm_gem_object_unreference_unlocked(obj
);
1058 addr
= vm_mmap(obj
->filp
, 0, args
->size
,
1059 PROT_READ
| PROT_WRITE
, MAP_SHARED
,
1061 drm_gem_object_unreference_unlocked(obj
);
1062 if (IS_ERR((void *)addr
))
1065 args
->addr_ptr
= (uint64_t) addr
;
1071 * i915_gem_fault - fault a page into the GTT
1072 * vma: VMA in question
1075 * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped
1076 * from userspace. The fault handler takes care of binding the object to
1077 * the GTT (if needed), allocating and programming a fence register (again,
1078 * only if needed based on whether the old reg is still valid or the object
1079 * is tiled) and inserting a new PTE into the faulting process.
1081 * Note that the faulting process may involve evicting existing objects
1082 * from the GTT and/or fence registers to make room. So performance may
1083 * suffer if the GTT working set is large or there are few fence registers
1086 int i915_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
1088 struct drm_i915_gem_object
*obj
= to_intel_bo(vma
->vm_private_data
);
1089 struct drm_device
*dev
= obj
->base
.dev
;
1090 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1091 pgoff_t page_offset
;
1094 bool write
= !!(vmf
->flags
& FAULT_FLAG_WRITE
);
1096 /* We don't use vmf->pgoff since that has the fake offset */
1097 page_offset
= ((unsigned long)vmf
->virtual_address
- vma
->vm_start
) >>
1100 ret
= i915_mutex_lock_interruptible(dev
);
1104 trace_i915_gem_object_fault(obj
, page_offset
, true, write
);
1106 /* Now bind it into the GTT if needed */
1107 if (!obj
->map_and_fenceable
) {
1108 ret
= i915_gem_object_unbind(obj
);
1112 if (!obj
->gtt_space
) {
1113 ret
= i915_gem_object_bind_to_gtt(obj
, 0, true);
1117 ret
= i915_gem_object_set_to_gtt_domain(obj
, write
);
1122 if (!obj
->has_global_gtt_mapping
)
1123 i915_gem_gtt_bind_object(obj
, obj
->cache_level
);
1125 ret
= i915_gem_object_get_fence(obj
);
1129 if (i915_gem_object_is_inactive(obj
))
1130 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
1132 obj
->fault_mappable
= true;
1134 pfn
= ((dev_priv
->mm
.gtt_base_addr
+ obj
->gtt_offset
) >> PAGE_SHIFT
) +
1137 /* Finally, remap it using the new GTT offset */
1138 ret
= vm_insert_pfn(vma
, (unsigned long)vmf
->virtual_address
, pfn
);
1140 mutex_unlock(&dev
->struct_mutex
);
1145 /* Give the error handler a chance to run and move the
1146 * objects off the GPU active list. Next time we service the
1147 * fault, we should be able to transition the page into the
1148 * GTT without touching the GPU (and so avoid further
1149 * EIO/EGAIN). If the GPU is wedged, then there is no issue
1150 * with coherency, just lost writes.
1156 return VM_FAULT_NOPAGE
;
1158 return VM_FAULT_OOM
;
1160 return VM_FAULT_SIGBUS
;
1165 * i915_gem_release_mmap - remove physical page mappings
1166 * @obj: obj in question
1168 * Preserve the reservation of the mmapping with the DRM core code, but
1169 * relinquish ownership of the pages back to the system.
1171 * It is vital that we remove the page mapping if we have mapped a tiled
1172 * object through the GTT and then lose the fence register due to
1173 * resource pressure. Similarly if the object has been moved out of the
1174 * aperture, than pages mapped into userspace must be revoked. Removing the
1175 * mapping will then trigger a page fault on the next user access, allowing
1176 * fixup by i915_gem_fault().
1179 i915_gem_release_mmap(struct drm_i915_gem_object
*obj
)
1181 if (!obj
->fault_mappable
)
1184 if (obj
->base
.dev
->dev_mapping
)
1185 unmap_mapping_range(obj
->base
.dev
->dev_mapping
,
1186 (loff_t
)obj
->base
.map_list
.hash
.key
<<PAGE_SHIFT
,
1189 obj
->fault_mappable
= false;
1193 i915_gem_get_gtt_size(struct drm_device
*dev
, uint32_t size
, int tiling_mode
)
1197 if (INTEL_INFO(dev
)->gen
>= 4 ||
1198 tiling_mode
== I915_TILING_NONE
)
1201 /* Previous chips need a power-of-two fence region when tiling */
1202 if (INTEL_INFO(dev
)->gen
== 3)
1203 gtt_size
= 1024*1024;
1205 gtt_size
= 512*1024;
1207 while (gtt_size
< size
)
1214 * i915_gem_get_gtt_alignment - return required GTT alignment for an object
1215 * @obj: object to check
1217 * Return the required GTT alignment for an object, taking into account
1218 * potential fence register mapping.
1221 i915_gem_get_gtt_alignment(struct drm_device
*dev
,
1226 * Minimum alignment is 4k (GTT page size), but might be greater
1227 * if a fence register is needed for the object.
1229 if (INTEL_INFO(dev
)->gen
>= 4 ||
1230 tiling_mode
== I915_TILING_NONE
)
1234 * Previous chips need to be aligned to the size of the smallest
1235 * fence register that can contain the object.
1237 return i915_gem_get_gtt_size(dev
, size
, tiling_mode
);
1241 * i915_gem_get_unfenced_gtt_alignment - return required GTT alignment for an
1244 * @size: size of the object
1245 * @tiling_mode: tiling mode of the object
1247 * Return the required GTT alignment for an object, only taking into account
1248 * unfenced tiled surface requirements.
1251 i915_gem_get_unfenced_gtt_alignment(struct drm_device
*dev
,
1256 * Minimum alignment is 4k (GTT page size) for sane hw.
1258 if (INTEL_INFO(dev
)->gen
>= 4 || IS_G33(dev
) ||
1259 tiling_mode
== I915_TILING_NONE
)
1262 /* Previous hardware however needs to be aligned to a power-of-two
1263 * tile height. The simplest method for determining this is to reuse
1264 * the power-of-tile object size.
1266 return i915_gem_get_gtt_size(dev
, size
, tiling_mode
);
1270 i915_gem_mmap_gtt(struct drm_file
*file
,
1271 struct drm_device
*dev
,
1275 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1276 struct drm_i915_gem_object
*obj
;
1279 ret
= i915_mutex_lock_interruptible(dev
);
1283 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, handle
));
1284 if (&obj
->base
== NULL
) {
1289 if (obj
->base
.size
> dev_priv
->mm
.gtt_mappable_end
) {
1294 if (obj
->madv
!= I915_MADV_WILLNEED
) {
1295 DRM_ERROR("Attempting to mmap a purgeable buffer\n");
1300 if (!obj
->base
.map_list
.map
) {
1301 ret
= drm_gem_create_mmap_offset(&obj
->base
);
1306 *offset
= (u64
)obj
->base
.map_list
.hash
.key
<< PAGE_SHIFT
;
1309 drm_gem_object_unreference(&obj
->base
);
1311 mutex_unlock(&dev
->struct_mutex
);
1316 * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing
1318 * @data: GTT mapping ioctl data
1319 * @file: GEM object info
1321 * Simply returns the fake offset to userspace so it can mmap it.
1322 * The mmap call will end up in drm_gem_mmap(), which will set things
1323 * up so we can get faults in the handler above.
1325 * The fault handler will take care of binding the object into the GTT
1326 * (since it may have been evicted to make room for something), allocating
1327 * a fence register, and mapping the appropriate aperture address into
1331 i915_gem_mmap_gtt_ioctl(struct drm_device
*dev
, void *data
,
1332 struct drm_file
*file
)
1334 struct drm_i915_gem_mmap_gtt
*args
= data
;
1336 return i915_gem_mmap_gtt(file
, dev
, args
->handle
, &args
->offset
);
1340 i915_gem_object_get_pages_gtt(struct drm_i915_gem_object
*obj
,
1344 struct address_space
*mapping
;
1345 struct inode
*inode
;
1348 if (obj
->pages
|| obj
->sg_table
)
1351 /* Get the list of pages out of our struct file. They'll be pinned
1352 * at this point until we release them.
1354 page_count
= obj
->base
.size
/ PAGE_SIZE
;
1355 BUG_ON(obj
->pages
!= NULL
);
1356 obj
->pages
= drm_malloc_ab(page_count
, sizeof(struct page
*));
1357 if (obj
->pages
== NULL
)
1360 inode
= obj
->base
.filp
->f_path
.dentry
->d_inode
;
1361 mapping
= inode
->i_mapping
;
1362 gfpmask
|= mapping_gfp_mask(mapping
);
1364 for (i
= 0; i
< page_count
; i
++) {
1365 page
= shmem_read_mapping_page_gfp(mapping
, i
, gfpmask
);
1369 obj
->pages
[i
] = page
;
1372 if (i915_gem_object_needs_bit17_swizzle(obj
))
1373 i915_gem_object_do_bit_17_swizzle(obj
);
1379 page_cache_release(obj
->pages
[i
]);
1381 drm_free_large(obj
->pages
);
1383 return PTR_ERR(page
);
1387 i915_gem_object_put_pages_gtt(struct drm_i915_gem_object
*obj
)
1389 int page_count
= obj
->base
.size
/ PAGE_SIZE
;
1395 BUG_ON(obj
->madv
== __I915_MADV_PURGED
);
1397 if (i915_gem_object_needs_bit17_swizzle(obj
))
1398 i915_gem_object_save_bit_17_swizzle(obj
);
1400 if (obj
->madv
== I915_MADV_DONTNEED
)
1403 for (i
= 0; i
< page_count
; i
++) {
1405 set_page_dirty(obj
->pages
[i
]);
1407 if (obj
->madv
== I915_MADV_WILLNEED
)
1408 mark_page_accessed(obj
->pages
[i
]);
1410 page_cache_release(obj
->pages
[i
]);
1414 drm_free_large(obj
->pages
);
1419 i915_gem_object_move_to_active(struct drm_i915_gem_object
*obj
,
1420 struct intel_ring_buffer
*ring
,
1423 struct drm_device
*dev
= obj
->base
.dev
;
1424 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1426 BUG_ON(ring
== NULL
);
1429 /* Add a reference if we're newly entering the active list. */
1431 drm_gem_object_reference(&obj
->base
);
1435 /* Move from whatever list we were on to the tail of execution. */
1436 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.active_list
);
1437 list_move_tail(&obj
->ring_list
, &ring
->active_list
);
1439 obj
->last_rendering_seqno
= seqno
;
1441 if (obj
->fenced_gpu_access
) {
1442 obj
->last_fenced_seqno
= seqno
;
1444 /* Bump MRU to take account of the delayed flush */
1445 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
1446 struct drm_i915_fence_reg
*reg
;
1448 reg
= &dev_priv
->fence_regs
[obj
->fence_reg
];
1449 list_move_tail(®
->lru_list
,
1450 &dev_priv
->mm
.fence_list
);
1456 i915_gem_object_move_off_active(struct drm_i915_gem_object
*obj
)
1458 list_del_init(&obj
->ring_list
);
1459 obj
->last_rendering_seqno
= 0;
1460 obj
->last_fenced_seqno
= 0;
1464 i915_gem_object_move_to_flushing(struct drm_i915_gem_object
*obj
)
1466 struct drm_device
*dev
= obj
->base
.dev
;
1467 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1469 BUG_ON(!obj
->active
);
1470 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.flushing_list
);
1472 i915_gem_object_move_off_active(obj
);
1476 i915_gem_object_move_to_inactive(struct drm_i915_gem_object
*obj
)
1478 struct drm_device
*dev
= obj
->base
.dev
;
1479 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1481 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
1483 BUG_ON(!list_empty(&obj
->gpu_write_list
));
1484 BUG_ON(!obj
->active
);
1487 i915_gem_object_move_off_active(obj
);
1488 obj
->fenced_gpu_access
= false;
1491 obj
->pending_gpu_write
= false;
1492 drm_gem_object_unreference(&obj
->base
);
1494 WARN_ON(i915_verify_lists(dev
));
1497 /* Immediately discard the backing storage */
1499 i915_gem_object_truncate(struct drm_i915_gem_object
*obj
)
1501 struct inode
*inode
;
1503 /* Our goal here is to return as much of the memory as
1504 * is possible back to the system as we are called from OOM.
1505 * To do this we must instruct the shmfs to drop all of its
1506 * backing pages, *now*.
1508 inode
= obj
->base
.filp
->f_path
.dentry
->d_inode
;
1509 shmem_truncate_range(inode
, 0, (loff_t
)-1);
1511 if (obj
->base
.map_list
.map
)
1512 drm_gem_free_mmap_offset(&obj
->base
);
1514 obj
->madv
= __I915_MADV_PURGED
;
1518 i915_gem_object_is_purgeable(struct drm_i915_gem_object
*obj
)
1520 return obj
->madv
== I915_MADV_DONTNEED
;
1524 i915_gem_process_flushing_list(struct intel_ring_buffer
*ring
,
1525 uint32_t flush_domains
)
1527 struct drm_i915_gem_object
*obj
, *next
;
1529 list_for_each_entry_safe(obj
, next
,
1530 &ring
->gpu_write_list
,
1532 if (obj
->base
.write_domain
& flush_domains
) {
1533 uint32_t old_write_domain
= obj
->base
.write_domain
;
1535 obj
->base
.write_domain
= 0;
1536 list_del_init(&obj
->gpu_write_list
);
1537 i915_gem_object_move_to_active(obj
, ring
,
1538 i915_gem_next_request_seqno(ring
));
1540 trace_i915_gem_object_change_domain(obj
,
1541 obj
->base
.read_domains
,
1548 i915_gem_get_seqno(struct drm_device
*dev
)
1550 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1551 u32 seqno
= dev_priv
->next_seqno
;
1553 /* reserve 0 for non-seqno */
1554 if (++dev_priv
->next_seqno
== 0)
1555 dev_priv
->next_seqno
= 1;
1561 i915_gem_next_request_seqno(struct intel_ring_buffer
*ring
)
1563 if (ring
->outstanding_lazy_request
== 0)
1564 ring
->outstanding_lazy_request
= i915_gem_get_seqno(ring
->dev
);
1566 return ring
->outstanding_lazy_request
;
1570 i915_add_request(struct intel_ring_buffer
*ring
,
1571 struct drm_file
*file
,
1572 struct drm_i915_gem_request
*request
)
1574 drm_i915_private_t
*dev_priv
= ring
->dev
->dev_private
;
1576 u32 request_ring_position
;
1581 * Emit any outstanding flushes - execbuf can fail to emit the flush
1582 * after having emitted the batchbuffer command. Hence we need to fix
1583 * things up similar to emitting the lazy request. The difference here
1584 * is that the flush _must_ happen before the next request, no matter
1587 if (ring
->gpu_caches_dirty
) {
1588 ret
= i915_gem_flush_ring(ring
, 0, I915_GEM_GPU_DOMAINS
);
1592 ring
->gpu_caches_dirty
= false;
1595 BUG_ON(request
== NULL
);
1596 seqno
= i915_gem_next_request_seqno(ring
);
1598 /* Record the position of the start of the request so that
1599 * should we detect the updated seqno part-way through the
1600 * GPU processing the request, we never over-estimate the
1601 * position of the head.
1603 request_ring_position
= intel_ring_get_tail(ring
);
1605 ret
= ring
->add_request(ring
, &seqno
);
1609 trace_i915_gem_request_add(ring
, seqno
);
1611 request
->seqno
= seqno
;
1612 request
->ring
= ring
;
1613 request
->tail
= request_ring_position
;
1614 request
->emitted_jiffies
= jiffies
;
1615 was_empty
= list_empty(&ring
->request_list
);
1616 list_add_tail(&request
->list
, &ring
->request_list
);
1619 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
1621 spin_lock(&file_priv
->mm
.lock
);
1622 request
->file_priv
= file_priv
;
1623 list_add_tail(&request
->client_list
,
1624 &file_priv
->mm
.request_list
);
1625 spin_unlock(&file_priv
->mm
.lock
);
1628 ring
->outstanding_lazy_request
= 0;
1630 if (!dev_priv
->mm
.suspended
) {
1631 if (i915_enable_hangcheck
) {
1632 mod_timer(&dev_priv
->hangcheck_timer
,
1634 msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD
));
1637 queue_delayed_work(dev_priv
->wq
,
1638 &dev_priv
->mm
.retire_work
, HZ
);
1641 WARN_ON(!list_empty(&ring
->gpu_write_list
));
1647 i915_gem_request_remove_from_client(struct drm_i915_gem_request
*request
)
1649 struct drm_i915_file_private
*file_priv
= request
->file_priv
;
1654 spin_lock(&file_priv
->mm
.lock
);
1655 if (request
->file_priv
) {
1656 list_del(&request
->client_list
);
1657 request
->file_priv
= NULL
;
1659 spin_unlock(&file_priv
->mm
.lock
);
1662 static void i915_gem_reset_ring_lists(struct drm_i915_private
*dev_priv
,
1663 struct intel_ring_buffer
*ring
)
1665 while (!list_empty(&ring
->request_list
)) {
1666 struct drm_i915_gem_request
*request
;
1668 request
= list_first_entry(&ring
->request_list
,
1669 struct drm_i915_gem_request
,
1672 list_del(&request
->list
);
1673 i915_gem_request_remove_from_client(request
);
1677 while (!list_empty(&ring
->active_list
)) {
1678 struct drm_i915_gem_object
*obj
;
1680 obj
= list_first_entry(&ring
->active_list
,
1681 struct drm_i915_gem_object
,
1684 obj
->base
.write_domain
= 0;
1685 list_del_init(&obj
->gpu_write_list
);
1686 i915_gem_object_move_to_inactive(obj
);
1690 static void i915_gem_reset_fences(struct drm_device
*dev
)
1692 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1695 for (i
= 0; i
< dev_priv
->num_fence_regs
; i
++) {
1696 struct drm_i915_fence_reg
*reg
= &dev_priv
->fence_regs
[i
];
1698 i915_gem_write_fence(dev
, i
, NULL
);
1701 i915_gem_object_fence_lost(reg
->obj
);
1705 INIT_LIST_HEAD(®
->lru_list
);
1708 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
1711 void i915_gem_reset(struct drm_device
*dev
)
1713 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1714 struct drm_i915_gem_object
*obj
;
1715 struct intel_ring_buffer
*ring
;
1718 for_each_ring(ring
, dev_priv
, i
)
1719 i915_gem_reset_ring_lists(dev_priv
, ring
);
1721 /* Remove anything from the flushing lists. The GPU cache is likely
1722 * to be lost on reset along with the data, so simply move the
1723 * lost bo to the inactive list.
1725 while (!list_empty(&dev_priv
->mm
.flushing_list
)) {
1726 obj
= list_first_entry(&dev_priv
->mm
.flushing_list
,
1727 struct drm_i915_gem_object
,
1730 obj
->base
.write_domain
= 0;
1731 list_del_init(&obj
->gpu_write_list
);
1732 i915_gem_object_move_to_inactive(obj
);
1735 /* Move everything out of the GPU domains to ensure we do any
1736 * necessary invalidation upon reuse.
1738 list_for_each_entry(obj
,
1739 &dev_priv
->mm
.inactive_list
,
1742 obj
->base
.read_domains
&= ~I915_GEM_GPU_DOMAINS
;
1745 /* The fence registers are invalidated so clear them out */
1746 i915_gem_reset_fences(dev
);
1750 * This function clears the request list as sequence numbers are passed.
1753 i915_gem_retire_requests_ring(struct intel_ring_buffer
*ring
)
1758 if (list_empty(&ring
->request_list
))
1761 WARN_ON(i915_verify_lists(ring
->dev
));
1763 seqno
= ring
->get_seqno(ring
);
1765 for (i
= 0; i
< ARRAY_SIZE(ring
->sync_seqno
); i
++)
1766 if (seqno
>= ring
->sync_seqno
[i
])
1767 ring
->sync_seqno
[i
] = 0;
1769 while (!list_empty(&ring
->request_list
)) {
1770 struct drm_i915_gem_request
*request
;
1772 request
= list_first_entry(&ring
->request_list
,
1773 struct drm_i915_gem_request
,
1776 if (!i915_seqno_passed(seqno
, request
->seqno
))
1779 trace_i915_gem_request_retire(ring
, request
->seqno
);
1780 /* We know the GPU must have read the request to have
1781 * sent us the seqno + interrupt, so use the position
1782 * of tail of the request to update the last known position
1785 ring
->last_retired_head
= request
->tail
;
1787 list_del(&request
->list
);
1788 i915_gem_request_remove_from_client(request
);
1792 /* Move any buffers on the active list that are no longer referenced
1793 * by the ringbuffer to the flushing/inactive lists as appropriate.
1795 while (!list_empty(&ring
->active_list
)) {
1796 struct drm_i915_gem_object
*obj
;
1798 obj
= list_first_entry(&ring
->active_list
,
1799 struct drm_i915_gem_object
,
1802 if (!i915_seqno_passed(seqno
, obj
->last_rendering_seqno
))
1805 if (obj
->base
.write_domain
!= 0)
1806 i915_gem_object_move_to_flushing(obj
);
1808 i915_gem_object_move_to_inactive(obj
);
1811 if (unlikely(ring
->trace_irq_seqno
&&
1812 i915_seqno_passed(seqno
, ring
->trace_irq_seqno
))) {
1813 ring
->irq_put(ring
);
1814 ring
->trace_irq_seqno
= 0;
1817 WARN_ON(i915_verify_lists(ring
->dev
));
1821 i915_gem_retire_requests(struct drm_device
*dev
)
1823 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1824 struct intel_ring_buffer
*ring
;
1827 for_each_ring(ring
, dev_priv
, i
)
1828 i915_gem_retire_requests_ring(ring
);
1832 i915_gem_retire_work_handler(struct work_struct
*work
)
1834 drm_i915_private_t
*dev_priv
;
1835 struct drm_device
*dev
;
1836 struct intel_ring_buffer
*ring
;
1840 dev_priv
= container_of(work
, drm_i915_private_t
,
1841 mm
.retire_work
.work
);
1842 dev
= dev_priv
->dev
;
1844 /* Come back later if the device is busy... */
1845 if (!mutex_trylock(&dev
->struct_mutex
)) {
1846 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, HZ
);
1850 i915_gem_retire_requests(dev
);
1852 /* Send a periodic flush down the ring so we don't hold onto GEM
1853 * objects indefinitely.
1856 for_each_ring(ring
, dev_priv
, i
) {
1857 if (ring
->gpu_caches_dirty
) {
1858 struct drm_i915_gem_request
*request
;
1860 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1861 if (request
== NULL
||
1862 i915_add_request(ring
, NULL
, request
))
1866 idle
&= list_empty(&ring
->request_list
);
1869 if (!dev_priv
->mm
.suspended
&& !idle
)
1870 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, HZ
);
1872 mutex_unlock(&dev
->struct_mutex
);
1876 i915_gem_check_wedge(struct drm_i915_private
*dev_priv
,
1879 if (atomic_read(&dev_priv
->mm
.wedged
)) {
1880 struct completion
*x
= &dev_priv
->error_completion
;
1881 bool recovery_complete
;
1882 unsigned long flags
;
1884 /* Give the error handler a chance to run. */
1885 spin_lock_irqsave(&x
->wait
.lock
, flags
);
1886 recovery_complete
= x
->done
> 0;
1887 spin_unlock_irqrestore(&x
->wait
.lock
, flags
);
1889 /* Non-interruptible callers can't handle -EAGAIN, hence return
1890 * -EIO unconditionally for these. */
1894 /* Recovery complete, but still wedged means reset failure. */
1895 if (recovery_complete
)
1905 * Compare seqno against outstanding lazy request. Emit a request if they are
1909 i915_gem_check_olr(struct intel_ring_buffer
*ring
, u32 seqno
)
1913 BUG_ON(!mutex_is_locked(&ring
->dev
->struct_mutex
));
1915 if (seqno
== ring
->outstanding_lazy_request
) {
1916 struct drm_i915_gem_request
*request
;
1918 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1919 if (request
== NULL
)
1922 ret
= i915_add_request(ring
, NULL
, request
);
1928 BUG_ON(seqno
!= request
->seqno
);
1935 * __wait_seqno - wait until execution of seqno has finished
1936 * @ring: the ring expected to report seqno
1938 * @interruptible: do an interruptible wait (normally yes)
1939 * @timeout: in - how long to wait (NULL forever); out - how much time remaining
1941 * Returns 0 if the seqno was found within the alloted time. Else returns the
1942 * errno with remaining time filled in timeout argument.
1944 static int __wait_seqno(struct intel_ring_buffer
*ring
, u32 seqno
,
1945 bool interruptible
, struct timespec
*timeout
)
1947 drm_i915_private_t
*dev_priv
= ring
->dev
->dev_private
;
1948 struct timespec before
, now
, wait_time
={1,0};
1949 unsigned long timeout_jiffies
;
1951 bool wait_forever
= true;
1954 if (i915_seqno_passed(ring
->get_seqno(ring
), seqno
))
1957 trace_i915_gem_request_wait_begin(ring
, seqno
);
1959 if (timeout
!= NULL
) {
1960 wait_time
= *timeout
;
1961 wait_forever
= false;
1964 timeout_jiffies
= timespec_to_jiffies(&wait_time
);
1966 if (WARN_ON(!ring
->irq_get(ring
)))
1969 /* Record current time in case interrupted by signal, or wedged * */
1970 getrawmonotonic(&before
);
1973 (i915_seqno_passed(ring->get_seqno(ring), seqno) || \
1974 atomic_read(&dev_priv->mm.wedged))
1977 end
= wait_event_interruptible_timeout(ring
->irq_queue
,
1981 end
= wait_event_timeout(ring
->irq_queue
, EXIT_COND
,
1984 ret
= i915_gem_check_wedge(dev_priv
, interruptible
);
1987 } while (end
== 0 && wait_forever
);
1989 getrawmonotonic(&now
);
1991 ring
->irq_put(ring
);
1992 trace_i915_gem_request_wait_end(ring
, seqno
);
1996 struct timespec sleep_time
= timespec_sub(now
, before
);
1997 *timeout
= timespec_sub(*timeout
, sleep_time
);
2001 case -EAGAIN
: /* Wedged */
2002 case -ERESTARTSYS
: /* Signal */
2004 case 0: /* Timeout */
2006 set_normalized_timespec(timeout
, 0, 0);
2008 default: /* Completed */
2009 WARN_ON(end
< 0); /* We're not aware of other errors */
2015 * Waits for a sequence number to be signaled, and cleans up the
2016 * request and object lists appropriately for that event.
2019 i915_wait_seqno(struct intel_ring_buffer
*ring
, uint32_t seqno
)
2021 drm_i915_private_t
*dev_priv
= ring
->dev
->dev_private
;
2026 ret
= i915_gem_check_wedge(dev_priv
, dev_priv
->mm
.interruptible
);
2030 ret
= i915_gem_check_olr(ring
, seqno
);
2034 ret
= __wait_seqno(ring
, seqno
, dev_priv
->mm
.interruptible
, NULL
);
2040 * Ensures that all rendering to the object has completed and the object is
2041 * safe to unbind from the GTT or access from the CPU.
2044 i915_gem_object_wait_rendering(struct drm_i915_gem_object
*obj
)
2048 /* This function only exists to support waiting for existing rendering,
2049 * not for emitting required flushes.
2051 BUG_ON((obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
) != 0);
2053 /* If there is rendering queued on the buffer being evicted, wait for
2057 ret
= i915_wait_seqno(obj
->ring
, obj
->last_rendering_seqno
);
2060 i915_gem_retire_requests_ring(obj
->ring
);
2067 * Ensures that an object will eventually get non-busy by flushing any required
2068 * write domains, emitting any outstanding lazy request and retiring and
2069 * completed requests.
2072 i915_gem_object_flush_active(struct drm_i915_gem_object
*obj
)
2077 ret
= i915_gem_object_flush_gpu_write_domain(obj
);
2081 ret
= i915_gem_check_olr(obj
->ring
,
2082 obj
->last_rendering_seqno
);
2085 i915_gem_retire_requests_ring(obj
->ring
);
2092 * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT
2093 * @DRM_IOCTL_ARGS: standard ioctl arguments
2095 * Returns 0 if successful, else an error is returned with the remaining time in
2096 * the timeout parameter.
2097 * -ETIME: object is still busy after timeout
2098 * -ERESTARTSYS: signal interrupted the wait
2099 * -ENONENT: object doesn't exist
2100 * Also possible, but rare:
2101 * -EAGAIN: GPU wedged
2103 * -ENODEV: Internal IRQ fail
2104 * -E?: The add request failed
2106 * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any
2107 * non-zero timeout parameter the wait ioctl will wait for the given number of
2108 * nanoseconds on an object becoming unbusy. Since the wait itself does so
2109 * without holding struct_mutex the object may become re-busied before this
2110 * function completes. A similar but shorter * race condition exists in the busy
2114 i915_gem_wait_ioctl(struct drm_device
*dev
, void *data
, struct drm_file
*file
)
2116 struct drm_i915_gem_wait
*args
= data
;
2117 struct drm_i915_gem_object
*obj
;
2118 struct intel_ring_buffer
*ring
= NULL
;
2119 struct timespec timeout_stack
, *timeout
= NULL
;
2123 if (args
->timeout_ns
>= 0) {
2124 timeout_stack
= ns_to_timespec(args
->timeout_ns
);
2125 timeout
= &timeout_stack
;
2128 ret
= i915_mutex_lock_interruptible(dev
);
2132 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->bo_handle
));
2133 if (&obj
->base
== NULL
) {
2134 mutex_unlock(&dev
->struct_mutex
);
2138 /* Need to make sure the object gets inactive eventually. */
2139 ret
= i915_gem_object_flush_active(obj
);
2144 seqno
= obj
->last_rendering_seqno
;
2151 /* Do this after OLR check to make sure we make forward progress polling
2152 * on this IOCTL with a 0 timeout (like busy ioctl)
2154 if (!args
->timeout_ns
) {
2159 drm_gem_object_unreference(&obj
->base
);
2160 mutex_unlock(&dev
->struct_mutex
);
2162 ret
= __wait_seqno(ring
, seqno
, true, timeout
);
2164 WARN_ON(!timespec_valid(timeout
));
2165 args
->timeout_ns
= timespec_to_ns(timeout
);
2170 drm_gem_object_unreference(&obj
->base
);
2171 mutex_unlock(&dev
->struct_mutex
);
2176 * i915_gem_object_sync - sync an object to a ring.
2178 * @obj: object which may be in use on another ring.
2179 * @to: ring we wish to use the object on. May be NULL.
2181 * This code is meant to abstract object synchronization with the GPU.
2182 * Calling with NULL implies synchronizing the object with the CPU
2183 * rather than a particular GPU ring.
2185 * Returns 0 if successful, else propagates up the lower layer error.
2188 i915_gem_object_sync(struct drm_i915_gem_object
*obj
,
2189 struct intel_ring_buffer
*to
)
2191 struct intel_ring_buffer
*from
= obj
->ring
;
2195 if (from
== NULL
|| to
== from
)
2198 if (to
== NULL
|| !i915_semaphore_is_enabled(obj
->base
.dev
))
2199 return i915_gem_object_wait_rendering(obj
);
2201 idx
= intel_ring_sync_index(from
, to
);
2203 seqno
= obj
->last_rendering_seqno
;
2204 if (seqno
<= from
->sync_seqno
[idx
])
2207 ret
= i915_gem_check_olr(obj
->ring
, seqno
);
2211 ret
= to
->sync_to(to
, from
, seqno
);
2213 from
->sync_seqno
[idx
] = seqno
;
2218 static void i915_gem_object_finish_gtt(struct drm_i915_gem_object
*obj
)
2220 u32 old_write_domain
, old_read_domains
;
2222 /* Act a barrier for all accesses through the GTT */
2225 /* Force a pagefault for domain tracking on next user access */
2226 i915_gem_release_mmap(obj
);
2228 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
) == 0)
2231 old_read_domains
= obj
->base
.read_domains
;
2232 old_write_domain
= obj
->base
.write_domain
;
2234 obj
->base
.read_domains
&= ~I915_GEM_DOMAIN_GTT
;
2235 obj
->base
.write_domain
&= ~I915_GEM_DOMAIN_GTT
;
2237 trace_i915_gem_object_change_domain(obj
,
2243 * Unbinds an object from the GTT aperture.
2246 i915_gem_object_unbind(struct drm_i915_gem_object
*obj
)
2248 drm_i915_private_t
*dev_priv
= obj
->base
.dev
->dev_private
;
2251 if (obj
->gtt_space
== NULL
)
2257 ret
= i915_gem_object_finish_gpu(obj
);
2260 /* Continue on if we fail due to EIO, the GPU is hung so we
2261 * should be safe and we need to cleanup or else we might
2262 * cause memory corruption through use-after-free.
2265 i915_gem_object_finish_gtt(obj
);
2267 /* Move the object to the CPU domain to ensure that
2268 * any possible CPU writes while it's not in the GTT
2269 * are flushed when we go to remap it.
2272 ret
= i915_gem_object_set_to_cpu_domain(obj
, 1);
2273 if (ret
== -ERESTARTSYS
)
2276 /* In the event of a disaster, abandon all caches and
2277 * hope for the best.
2279 i915_gem_clflush_object(obj
);
2280 obj
->base
.read_domains
= obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
2283 /* release the fence reg _after_ flushing */
2284 ret
= i915_gem_object_put_fence(obj
);
2288 trace_i915_gem_object_unbind(obj
);
2290 if (obj
->has_global_gtt_mapping
)
2291 i915_gem_gtt_unbind_object(obj
);
2292 if (obj
->has_aliasing_ppgtt_mapping
) {
2293 i915_ppgtt_unbind_object(dev_priv
->mm
.aliasing_ppgtt
, obj
);
2294 obj
->has_aliasing_ppgtt_mapping
= 0;
2296 i915_gem_gtt_finish_object(obj
);
2298 i915_gem_object_put_pages_gtt(obj
);
2300 list_del_init(&obj
->gtt_list
);
2301 list_del_init(&obj
->mm_list
);
2302 /* Avoid an unnecessary call to unbind on rebind. */
2303 obj
->map_and_fenceable
= true;
2305 drm_mm_put_block(obj
->gtt_space
);
2306 obj
->gtt_space
= NULL
;
2307 obj
->gtt_offset
= 0;
2309 if (i915_gem_object_is_purgeable(obj
))
2310 i915_gem_object_truncate(obj
);
2316 i915_gem_flush_ring(struct intel_ring_buffer
*ring
,
2317 uint32_t invalidate_domains
,
2318 uint32_t flush_domains
)
2322 if (((invalidate_domains
| flush_domains
) & I915_GEM_GPU_DOMAINS
) == 0)
2325 trace_i915_gem_ring_flush(ring
, invalidate_domains
, flush_domains
);
2327 ret
= ring
->flush(ring
, invalidate_domains
, flush_domains
);
2331 if (flush_domains
& I915_GEM_GPU_DOMAINS
)
2332 i915_gem_process_flushing_list(ring
, flush_domains
);
2337 static int i915_ring_idle(struct intel_ring_buffer
*ring
)
2341 if (list_empty(&ring
->gpu_write_list
) && list_empty(&ring
->active_list
))
2344 if (!list_empty(&ring
->gpu_write_list
)) {
2345 ret
= i915_gem_flush_ring(ring
,
2346 I915_GEM_GPU_DOMAINS
, I915_GEM_GPU_DOMAINS
);
2351 return i915_wait_seqno(ring
, i915_gem_next_request_seqno(ring
));
2354 int i915_gpu_idle(struct drm_device
*dev
)
2356 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2357 struct intel_ring_buffer
*ring
;
2360 /* Flush everything onto the inactive list. */
2361 for_each_ring(ring
, dev_priv
, i
) {
2362 ret
= i915_ring_idle(ring
);
2366 /* Is the device fubar? */
2367 if (WARN_ON(!list_empty(&ring
->gpu_write_list
)))
2370 ret
= i915_switch_context(ring
, NULL
, DEFAULT_CONTEXT_ID
);
2378 static void sandybridge_write_fence_reg(struct drm_device
*dev
, int reg
,
2379 struct drm_i915_gem_object
*obj
)
2381 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2385 u32 size
= obj
->gtt_space
->size
;
2387 val
= (uint64_t)((obj
->gtt_offset
+ size
- 4096) &
2389 val
|= obj
->gtt_offset
& 0xfffff000;
2390 val
|= (uint64_t)((obj
->stride
/ 128) - 1) <<
2391 SANDYBRIDGE_FENCE_PITCH_SHIFT
;
2393 if (obj
->tiling_mode
== I915_TILING_Y
)
2394 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2395 val
|= I965_FENCE_REG_VALID
;
2399 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0
+ reg
* 8, val
);
2400 POSTING_READ(FENCE_REG_SANDYBRIDGE_0
+ reg
* 8);
2403 static void i965_write_fence_reg(struct drm_device
*dev
, int reg
,
2404 struct drm_i915_gem_object
*obj
)
2406 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2410 u32 size
= obj
->gtt_space
->size
;
2412 val
= (uint64_t)((obj
->gtt_offset
+ size
- 4096) &
2414 val
|= obj
->gtt_offset
& 0xfffff000;
2415 val
|= ((obj
->stride
/ 128) - 1) << I965_FENCE_PITCH_SHIFT
;
2416 if (obj
->tiling_mode
== I915_TILING_Y
)
2417 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2418 val
|= I965_FENCE_REG_VALID
;
2422 I915_WRITE64(FENCE_REG_965_0
+ reg
* 8, val
);
2423 POSTING_READ(FENCE_REG_965_0
+ reg
* 8);
2426 static void i915_write_fence_reg(struct drm_device
*dev
, int reg
,
2427 struct drm_i915_gem_object
*obj
)
2429 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2433 u32 size
= obj
->gtt_space
->size
;
2437 WARN((obj
->gtt_offset
& ~I915_FENCE_START_MASK
) ||
2438 (size
& -size
) != size
||
2439 (obj
->gtt_offset
& (size
- 1)),
2440 "object 0x%08x [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
2441 obj
->gtt_offset
, obj
->map_and_fenceable
, size
);
2443 if (obj
->tiling_mode
== I915_TILING_Y
&& HAS_128_BYTE_Y_TILING(dev
))
2448 /* Note: pitch better be a power of two tile widths */
2449 pitch_val
= obj
->stride
/ tile_width
;
2450 pitch_val
= ffs(pitch_val
) - 1;
2452 val
= obj
->gtt_offset
;
2453 if (obj
->tiling_mode
== I915_TILING_Y
)
2454 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2455 val
|= I915_FENCE_SIZE_BITS(size
);
2456 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2457 val
|= I830_FENCE_REG_VALID
;
2462 reg
= FENCE_REG_830_0
+ reg
* 4;
2464 reg
= FENCE_REG_945_8
+ (reg
- 8) * 4;
2466 I915_WRITE(reg
, val
);
2470 static void i830_write_fence_reg(struct drm_device
*dev
, int reg
,
2471 struct drm_i915_gem_object
*obj
)
2473 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2477 u32 size
= obj
->gtt_space
->size
;
2480 WARN((obj
->gtt_offset
& ~I830_FENCE_START_MASK
) ||
2481 (size
& -size
) != size
||
2482 (obj
->gtt_offset
& (size
- 1)),
2483 "object 0x%08x not 512K or pot-size 0x%08x aligned\n",
2484 obj
->gtt_offset
, size
);
2486 pitch_val
= obj
->stride
/ 128;
2487 pitch_val
= ffs(pitch_val
) - 1;
2489 val
= obj
->gtt_offset
;
2490 if (obj
->tiling_mode
== I915_TILING_Y
)
2491 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2492 val
|= I830_FENCE_SIZE_BITS(size
);
2493 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2494 val
|= I830_FENCE_REG_VALID
;
2498 I915_WRITE(FENCE_REG_830_0
+ reg
* 4, val
);
2499 POSTING_READ(FENCE_REG_830_0
+ reg
* 4);
2502 static void i915_gem_write_fence(struct drm_device
*dev
, int reg
,
2503 struct drm_i915_gem_object
*obj
)
2505 switch (INTEL_INFO(dev
)->gen
) {
2507 case 6: sandybridge_write_fence_reg(dev
, reg
, obj
); break;
2509 case 4: i965_write_fence_reg(dev
, reg
, obj
); break;
2510 case 3: i915_write_fence_reg(dev
, reg
, obj
); break;
2511 case 2: i830_write_fence_reg(dev
, reg
, obj
); break;
2516 static inline int fence_number(struct drm_i915_private
*dev_priv
,
2517 struct drm_i915_fence_reg
*fence
)
2519 return fence
- dev_priv
->fence_regs
;
2522 static void i915_gem_object_update_fence(struct drm_i915_gem_object
*obj
,
2523 struct drm_i915_fence_reg
*fence
,
2526 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2527 int reg
= fence_number(dev_priv
, fence
);
2529 i915_gem_write_fence(obj
->base
.dev
, reg
, enable
? obj
: NULL
);
2532 obj
->fence_reg
= reg
;
2534 list_move_tail(&fence
->lru_list
, &dev_priv
->mm
.fence_list
);
2536 obj
->fence_reg
= I915_FENCE_REG_NONE
;
2538 list_del_init(&fence
->lru_list
);
2543 i915_gem_object_flush_fence(struct drm_i915_gem_object
*obj
)
2547 if (obj
->fenced_gpu_access
) {
2548 if (obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
) {
2549 ret
= i915_gem_flush_ring(obj
->ring
,
2550 0, obj
->base
.write_domain
);
2555 obj
->fenced_gpu_access
= false;
2558 if (obj
->last_fenced_seqno
) {
2559 ret
= i915_wait_seqno(obj
->ring
, obj
->last_fenced_seqno
);
2563 obj
->last_fenced_seqno
= 0;
2566 /* Ensure that all CPU reads are completed before installing a fence
2567 * and all writes before removing the fence.
2569 if (obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
)
2576 i915_gem_object_put_fence(struct drm_i915_gem_object
*obj
)
2578 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2581 ret
= i915_gem_object_flush_fence(obj
);
2585 if (obj
->fence_reg
== I915_FENCE_REG_NONE
)
2588 i915_gem_object_update_fence(obj
,
2589 &dev_priv
->fence_regs
[obj
->fence_reg
],
2591 i915_gem_object_fence_lost(obj
);
2596 static struct drm_i915_fence_reg
*
2597 i915_find_fence_reg(struct drm_device
*dev
)
2599 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2600 struct drm_i915_fence_reg
*reg
, *avail
;
2603 /* First try to find a free reg */
2605 for (i
= dev_priv
->fence_reg_start
; i
< dev_priv
->num_fence_regs
; i
++) {
2606 reg
= &dev_priv
->fence_regs
[i
];
2610 if (!reg
->pin_count
)
2617 /* None available, try to steal one or wait for a user to finish */
2618 list_for_each_entry(reg
, &dev_priv
->mm
.fence_list
, lru_list
) {
2629 * i915_gem_object_get_fence - set up fencing for an object
2630 * @obj: object to map through a fence reg
2632 * When mapping objects through the GTT, userspace wants to be able to write
2633 * to them without having to worry about swizzling if the object is tiled.
2634 * This function walks the fence regs looking for a free one for @obj,
2635 * stealing one if it can't find any.
2637 * It then sets up the reg based on the object's properties: address, pitch
2638 * and tiling format.
2640 * For an untiled surface, this removes any existing fence.
2643 i915_gem_object_get_fence(struct drm_i915_gem_object
*obj
)
2645 struct drm_device
*dev
= obj
->base
.dev
;
2646 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2647 bool enable
= obj
->tiling_mode
!= I915_TILING_NONE
;
2648 struct drm_i915_fence_reg
*reg
;
2651 /* Have we updated the tiling parameters upon the object and so
2652 * will need to serialise the write to the associated fence register?
2654 if (obj
->fence_dirty
) {
2655 ret
= i915_gem_object_flush_fence(obj
);
2660 /* Just update our place in the LRU if our fence is getting reused. */
2661 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
2662 reg
= &dev_priv
->fence_regs
[obj
->fence_reg
];
2663 if (!obj
->fence_dirty
) {
2664 list_move_tail(®
->lru_list
,
2665 &dev_priv
->mm
.fence_list
);
2668 } else if (enable
) {
2669 reg
= i915_find_fence_reg(dev
);
2674 struct drm_i915_gem_object
*old
= reg
->obj
;
2676 ret
= i915_gem_object_flush_fence(old
);
2680 i915_gem_object_fence_lost(old
);
2685 i915_gem_object_update_fence(obj
, reg
, enable
);
2686 obj
->fence_dirty
= false;
2692 * Finds free space in the GTT aperture and binds the object there.
2695 i915_gem_object_bind_to_gtt(struct drm_i915_gem_object
*obj
,
2697 bool map_and_fenceable
)
2699 struct drm_device
*dev
= obj
->base
.dev
;
2700 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2701 struct drm_mm_node
*free_space
;
2702 gfp_t gfpmask
= __GFP_NORETRY
| __GFP_NOWARN
;
2703 u32 size
, fence_size
, fence_alignment
, unfenced_alignment
;
2704 bool mappable
, fenceable
;
2707 if (obj
->madv
!= I915_MADV_WILLNEED
) {
2708 DRM_ERROR("Attempting to bind a purgeable object\n");
2712 fence_size
= i915_gem_get_gtt_size(dev
,
2715 fence_alignment
= i915_gem_get_gtt_alignment(dev
,
2718 unfenced_alignment
=
2719 i915_gem_get_unfenced_gtt_alignment(dev
,
2724 alignment
= map_and_fenceable
? fence_alignment
:
2726 if (map_and_fenceable
&& alignment
& (fence_alignment
- 1)) {
2727 DRM_ERROR("Invalid object alignment requested %u\n", alignment
);
2731 size
= map_and_fenceable
? fence_size
: obj
->base
.size
;
2733 /* If the object is bigger than the entire aperture, reject it early
2734 * before evicting everything in a vain attempt to find space.
2736 if (obj
->base
.size
>
2737 (map_and_fenceable
? dev_priv
->mm
.gtt_mappable_end
: dev_priv
->mm
.gtt_total
)) {
2738 DRM_ERROR("Attempting to bind an object larger than the aperture\n");
2743 if (map_and_fenceable
)
2745 drm_mm_search_free_in_range(&dev_priv
->mm
.gtt_space
,
2747 dev_priv
->mm
.gtt_mappable_end
,
2750 free_space
= drm_mm_search_free(&dev_priv
->mm
.gtt_space
,
2751 size
, alignment
, 0);
2753 if (free_space
!= NULL
) {
2754 if (map_and_fenceable
)
2756 drm_mm_get_block_range_generic(free_space
,
2758 dev_priv
->mm
.gtt_mappable_end
,
2762 drm_mm_get_block(free_space
, size
, alignment
);
2764 if (obj
->gtt_space
== NULL
) {
2765 /* If the gtt is empty and we're still having trouble
2766 * fitting our object in, we're out of memory.
2768 ret
= i915_gem_evict_something(dev
, size
, alignment
,
2776 ret
= i915_gem_object_get_pages_gtt(obj
, gfpmask
);
2778 drm_mm_put_block(obj
->gtt_space
);
2779 obj
->gtt_space
= NULL
;
2781 if (ret
== -ENOMEM
) {
2782 /* first try to reclaim some memory by clearing the GTT */
2783 ret
= i915_gem_evict_everything(dev
, false);
2785 /* now try to shrink everyone else */
2800 ret
= i915_gem_gtt_prepare_object(obj
);
2802 i915_gem_object_put_pages_gtt(obj
);
2803 drm_mm_put_block(obj
->gtt_space
);
2804 obj
->gtt_space
= NULL
;
2806 if (i915_gem_evict_everything(dev
, false))
2812 if (!dev_priv
->mm
.aliasing_ppgtt
)
2813 i915_gem_gtt_bind_object(obj
, obj
->cache_level
);
2815 list_add_tail(&obj
->gtt_list
, &dev_priv
->mm
.gtt_list
);
2816 list_add_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
2818 /* Assert that the object is not currently in any GPU domain. As it
2819 * wasn't in the GTT, there shouldn't be any way it could have been in
2822 BUG_ON(obj
->base
.read_domains
& I915_GEM_GPU_DOMAINS
);
2823 BUG_ON(obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
);
2825 obj
->gtt_offset
= obj
->gtt_space
->start
;
2828 obj
->gtt_space
->size
== fence_size
&&
2829 (obj
->gtt_space
->start
& (fence_alignment
- 1)) == 0;
2832 obj
->gtt_offset
+ obj
->base
.size
<= dev_priv
->mm
.gtt_mappable_end
;
2834 obj
->map_and_fenceable
= mappable
&& fenceable
;
2836 trace_i915_gem_object_bind(obj
, map_and_fenceable
);
2841 i915_gem_clflush_object(struct drm_i915_gem_object
*obj
)
2843 /* If we don't have a page list set up, then we're not pinned
2844 * to GPU, and we can ignore the cache flush because it'll happen
2845 * again at bind time.
2847 if (obj
->pages
== NULL
)
2850 /* If the GPU is snooping the contents of the CPU cache,
2851 * we do not need to manually clear the CPU cache lines. However,
2852 * the caches are only snooped when the render cache is
2853 * flushed/invalidated. As we always have to emit invalidations
2854 * and flushes when moving into and out of the RENDER domain, correct
2855 * snooping behaviour occurs naturally as the result of our domain
2858 if (obj
->cache_level
!= I915_CACHE_NONE
)
2861 trace_i915_gem_object_clflush(obj
);
2863 drm_clflush_pages(obj
->pages
, obj
->base
.size
/ PAGE_SIZE
);
2866 /** Flushes any GPU write domain for the object if it's dirty. */
2868 i915_gem_object_flush_gpu_write_domain(struct drm_i915_gem_object
*obj
)
2870 if ((obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
) == 0)
2873 /* Queue the GPU write cache flushing we need. */
2874 return i915_gem_flush_ring(obj
->ring
, 0, obj
->base
.write_domain
);
2877 /** Flushes the GTT write domain for the object if it's dirty. */
2879 i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
)
2881 uint32_t old_write_domain
;
2883 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_GTT
)
2886 /* No actual flushing is required for the GTT write domain. Writes
2887 * to it immediately go to main memory as far as we know, so there's
2888 * no chipset flush. It also doesn't land in render cache.
2890 * However, we do have to enforce the order so that all writes through
2891 * the GTT land before any writes to the device, such as updates to
2896 old_write_domain
= obj
->base
.write_domain
;
2897 obj
->base
.write_domain
= 0;
2899 trace_i915_gem_object_change_domain(obj
,
2900 obj
->base
.read_domains
,
2904 /** Flushes the CPU write domain for the object if it's dirty. */
2906 i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
)
2908 uint32_t old_write_domain
;
2910 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
)
2913 i915_gem_clflush_object(obj
);
2914 intel_gtt_chipset_flush();
2915 old_write_domain
= obj
->base
.write_domain
;
2916 obj
->base
.write_domain
= 0;
2918 trace_i915_gem_object_change_domain(obj
,
2919 obj
->base
.read_domains
,
2924 * Moves a single object to the GTT read, and possibly write domain.
2926 * This function returns when the move is complete, including waiting on
2930 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object
*obj
, bool write
)
2932 drm_i915_private_t
*dev_priv
= obj
->base
.dev
->dev_private
;
2933 uint32_t old_write_domain
, old_read_domains
;
2936 /* Not valid to be called on unbound objects. */
2937 if (obj
->gtt_space
== NULL
)
2940 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_GTT
)
2943 ret
= i915_gem_object_flush_gpu_write_domain(obj
);
2947 if (obj
->pending_gpu_write
|| write
) {
2948 ret
= i915_gem_object_wait_rendering(obj
);
2953 i915_gem_object_flush_cpu_write_domain(obj
);
2955 old_write_domain
= obj
->base
.write_domain
;
2956 old_read_domains
= obj
->base
.read_domains
;
2958 /* It should now be out of any other write domains, and we can update
2959 * the domain values for our changes.
2961 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_GTT
) != 0);
2962 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
2964 obj
->base
.read_domains
= I915_GEM_DOMAIN_GTT
;
2965 obj
->base
.write_domain
= I915_GEM_DOMAIN_GTT
;
2969 trace_i915_gem_object_change_domain(obj
,
2973 /* And bump the LRU for this access */
2974 if (i915_gem_object_is_inactive(obj
))
2975 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
2980 int i915_gem_object_set_cache_level(struct drm_i915_gem_object
*obj
,
2981 enum i915_cache_level cache_level
)
2983 struct drm_device
*dev
= obj
->base
.dev
;
2984 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2987 if (obj
->cache_level
== cache_level
)
2990 if (obj
->pin_count
) {
2991 DRM_DEBUG("can not change the cache level of pinned objects\n");
2995 if (obj
->gtt_space
) {
2996 ret
= i915_gem_object_finish_gpu(obj
);
3000 i915_gem_object_finish_gtt(obj
);
3002 /* Before SandyBridge, you could not use tiling or fence
3003 * registers with snooped memory, so relinquish any fences
3004 * currently pointing to our region in the aperture.
3006 if (INTEL_INFO(obj
->base
.dev
)->gen
< 6) {
3007 ret
= i915_gem_object_put_fence(obj
);
3012 if (obj
->has_global_gtt_mapping
)
3013 i915_gem_gtt_bind_object(obj
, cache_level
);
3014 if (obj
->has_aliasing_ppgtt_mapping
)
3015 i915_ppgtt_bind_object(dev_priv
->mm
.aliasing_ppgtt
,
3019 if (cache_level
== I915_CACHE_NONE
) {
3020 u32 old_read_domains
, old_write_domain
;
3022 /* If we're coming from LLC cached, then we haven't
3023 * actually been tracking whether the data is in the
3024 * CPU cache or not, since we only allow one bit set
3025 * in obj->write_domain and have been skipping the clflushes.
3026 * Just set it to the CPU cache for now.
3028 WARN_ON(obj
->base
.write_domain
& ~I915_GEM_DOMAIN_CPU
);
3029 WARN_ON(obj
->base
.read_domains
& ~I915_GEM_DOMAIN_CPU
);
3031 old_read_domains
= obj
->base
.read_domains
;
3032 old_write_domain
= obj
->base
.write_domain
;
3034 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3035 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3037 trace_i915_gem_object_change_domain(obj
,
3042 obj
->cache_level
= cache_level
;
3047 * Prepare buffer for display plane (scanout, cursors, etc).
3048 * Can be called from an uninterruptible phase (modesetting) and allows
3049 * any flushes to be pipelined (for pageflips).
3052 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object
*obj
,
3054 struct intel_ring_buffer
*pipelined
)
3056 u32 old_read_domains
, old_write_domain
;
3059 ret
= i915_gem_object_flush_gpu_write_domain(obj
);
3063 if (pipelined
!= obj
->ring
) {
3064 ret
= i915_gem_object_sync(obj
, pipelined
);
3069 /* The display engine is not coherent with the LLC cache on gen6. As
3070 * a result, we make sure that the pinning that is about to occur is
3071 * done with uncached PTEs. This is lowest common denominator for all
3074 * However for gen6+, we could do better by using the GFDT bit instead
3075 * of uncaching, which would allow us to flush all the LLC-cached data
3076 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
3078 ret
= i915_gem_object_set_cache_level(obj
, I915_CACHE_NONE
);
3082 /* As the user may map the buffer once pinned in the display plane
3083 * (e.g. libkms for the bootup splash), we have to ensure that we
3084 * always use map_and_fenceable for all scanout buffers.
3086 ret
= i915_gem_object_pin(obj
, alignment
, true);
3090 i915_gem_object_flush_cpu_write_domain(obj
);
3092 old_write_domain
= obj
->base
.write_domain
;
3093 old_read_domains
= obj
->base
.read_domains
;
3095 /* It should now be out of any other write domains, and we can update
3096 * the domain values for our changes.
3098 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_GTT
) != 0);
3099 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
3101 trace_i915_gem_object_change_domain(obj
,
3109 i915_gem_object_finish_gpu(struct drm_i915_gem_object
*obj
)
3113 if ((obj
->base
.read_domains
& I915_GEM_GPU_DOMAINS
) == 0)
3116 if (obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
) {
3117 ret
= i915_gem_flush_ring(obj
->ring
, 0, obj
->base
.write_domain
);
3122 ret
= i915_gem_object_wait_rendering(obj
);
3126 /* Ensure that we invalidate the GPU's caches and TLBs. */
3127 obj
->base
.read_domains
&= ~I915_GEM_GPU_DOMAINS
;
3132 * Moves a single object to the CPU read, and possibly write domain.
3134 * This function returns when the move is complete, including waiting on
3138 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object
*obj
, bool write
)
3140 uint32_t old_write_domain
, old_read_domains
;
3143 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_CPU
)
3146 ret
= i915_gem_object_flush_gpu_write_domain(obj
);
3150 if (write
|| obj
->pending_gpu_write
) {
3151 ret
= i915_gem_object_wait_rendering(obj
);
3156 i915_gem_object_flush_gtt_write_domain(obj
);
3158 old_write_domain
= obj
->base
.write_domain
;
3159 old_read_domains
= obj
->base
.read_domains
;
3161 /* Flush the CPU cache if it's still invalid. */
3162 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
) == 0) {
3163 i915_gem_clflush_object(obj
);
3165 obj
->base
.read_domains
|= I915_GEM_DOMAIN_CPU
;
3168 /* It should now be out of any other write domains, and we can update
3169 * the domain values for our changes.
3171 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_CPU
) != 0);
3173 /* If we're writing through the CPU, then the GPU read domains will
3174 * need to be invalidated at next use.
3177 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3178 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3181 trace_i915_gem_object_change_domain(obj
,
3188 /* Throttle our rendering by waiting until the ring has completed our requests
3189 * emitted over 20 msec ago.
3191 * Note that if we were to use the current jiffies each time around the loop,
3192 * we wouldn't escape the function with any frames outstanding if the time to
3193 * render a frame was over 20ms.
3195 * This should get us reasonable parallelism between CPU and GPU but also
3196 * relatively low latency when blocking on a particular request to finish.
3199 i915_gem_ring_throttle(struct drm_device
*dev
, struct drm_file
*file
)
3201 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3202 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
3203 unsigned long recent_enough
= jiffies
- msecs_to_jiffies(20);
3204 struct drm_i915_gem_request
*request
;
3205 struct intel_ring_buffer
*ring
= NULL
;
3209 if (atomic_read(&dev_priv
->mm
.wedged
))
3212 spin_lock(&file_priv
->mm
.lock
);
3213 list_for_each_entry(request
, &file_priv
->mm
.request_list
, client_list
) {
3214 if (time_after_eq(request
->emitted_jiffies
, recent_enough
))
3217 ring
= request
->ring
;
3218 seqno
= request
->seqno
;
3220 spin_unlock(&file_priv
->mm
.lock
);
3225 ret
= __wait_seqno(ring
, seqno
, true, NULL
);
3227 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, 0);
3233 i915_gem_object_pin(struct drm_i915_gem_object
*obj
,
3235 bool map_and_fenceable
)
3239 BUG_ON(obj
->pin_count
== DRM_I915_GEM_OBJECT_MAX_PIN_COUNT
);
3241 if (obj
->gtt_space
!= NULL
) {
3242 if ((alignment
&& obj
->gtt_offset
& (alignment
- 1)) ||
3243 (map_and_fenceable
&& !obj
->map_and_fenceable
)) {
3244 WARN(obj
->pin_count
,
3245 "bo is already pinned with incorrect alignment:"
3246 " offset=%x, req.alignment=%x, req.map_and_fenceable=%d,"
3247 " obj->map_and_fenceable=%d\n",
3248 obj
->gtt_offset
, alignment
,
3250 obj
->map_and_fenceable
);
3251 ret
= i915_gem_object_unbind(obj
);
3257 if (obj
->gtt_space
== NULL
) {
3258 ret
= i915_gem_object_bind_to_gtt(obj
, alignment
,
3264 if (!obj
->has_global_gtt_mapping
&& map_and_fenceable
)
3265 i915_gem_gtt_bind_object(obj
, obj
->cache_level
);
3268 obj
->pin_mappable
|= map_and_fenceable
;
3274 i915_gem_object_unpin(struct drm_i915_gem_object
*obj
)
3276 BUG_ON(obj
->pin_count
== 0);
3277 BUG_ON(obj
->gtt_space
== NULL
);
3279 if (--obj
->pin_count
== 0)
3280 obj
->pin_mappable
= false;
3284 i915_gem_pin_ioctl(struct drm_device
*dev
, void *data
,
3285 struct drm_file
*file
)
3287 struct drm_i915_gem_pin
*args
= data
;
3288 struct drm_i915_gem_object
*obj
;
3291 ret
= i915_mutex_lock_interruptible(dev
);
3295 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3296 if (&obj
->base
== NULL
) {
3301 if (obj
->madv
!= I915_MADV_WILLNEED
) {
3302 DRM_ERROR("Attempting to pin a purgeable buffer\n");
3307 if (obj
->pin_filp
!= NULL
&& obj
->pin_filp
!= file
) {
3308 DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n",
3314 obj
->user_pin_count
++;
3315 obj
->pin_filp
= file
;
3316 if (obj
->user_pin_count
== 1) {
3317 ret
= i915_gem_object_pin(obj
, args
->alignment
, true);
3322 /* XXX - flush the CPU caches for pinned objects
3323 * as the X server doesn't manage domains yet
3325 i915_gem_object_flush_cpu_write_domain(obj
);
3326 args
->offset
= obj
->gtt_offset
;
3328 drm_gem_object_unreference(&obj
->base
);
3330 mutex_unlock(&dev
->struct_mutex
);
3335 i915_gem_unpin_ioctl(struct drm_device
*dev
, void *data
,
3336 struct drm_file
*file
)
3338 struct drm_i915_gem_pin
*args
= data
;
3339 struct drm_i915_gem_object
*obj
;
3342 ret
= i915_mutex_lock_interruptible(dev
);
3346 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3347 if (&obj
->base
== NULL
) {
3352 if (obj
->pin_filp
!= file
) {
3353 DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n",
3358 obj
->user_pin_count
--;
3359 if (obj
->user_pin_count
== 0) {
3360 obj
->pin_filp
= NULL
;
3361 i915_gem_object_unpin(obj
);
3365 drm_gem_object_unreference(&obj
->base
);
3367 mutex_unlock(&dev
->struct_mutex
);
3372 i915_gem_busy_ioctl(struct drm_device
*dev
, void *data
,
3373 struct drm_file
*file
)
3375 struct drm_i915_gem_busy
*args
= data
;
3376 struct drm_i915_gem_object
*obj
;
3379 ret
= i915_mutex_lock_interruptible(dev
);
3383 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3384 if (&obj
->base
== NULL
) {
3389 /* Count all active objects as busy, even if they are currently not used
3390 * by the gpu. Users of this interface expect objects to eventually
3391 * become non-busy without any further actions, therefore emit any
3392 * necessary flushes here.
3394 ret
= i915_gem_object_flush_active(obj
);
3396 args
->busy
= obj
->active
;
3398 drm_gem_object_unreference(&obj
->base
);
3400 mutex_unlock(&dev
->struct_mutex
);
3405 i915_gem_throttle_ioctl(struct drm_device
*dev
, void *data
,
3406 struct drm_file
*file_priv
)
3408 return i915_gem_ring_throttle(dev
, file_priv
);
3412 i915_gem_madvise_ioctl(struct drm_device
*dev
, void *data
,
3413 struct drm_file
*file_priv
)
3415 struct drm_i915_gem_madvise
*args
= data
;
3416 struct drm_i915_gem_object
*obj
;
3419 switch (args
->madv
) {
3420 case I915_MADV_DONTNEED
:
3421 case I915_MADV_WILLNEED
:
3427 ret
= i915_mutex_lock_interruptible(dev
);
3431 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file_priv
, args
->handle
));
3432 if (&obj
->base
== NULL
) {
3437 if (obj
->pin_count
) {
3442 if (obj
->madv
!= __I915_MADV_PURGED
)
3443 obj
->madv
= args
->madv
;
3445 /* if the object is no longer bound, discard its backing storage */
3446 if (i915_gem_object_is_purgeable(obj
) &&
3447 obj
->gtt_space
== NULL
)
3448 i915_gem_object_truncate(obj
);
3450 args
->retained
= obj
->madv
!= __I915_MADV_PURGED
;
3453 drm_gem_object_unreference(&obj
->base
);
3455 mutex_unlock(&dev
->struct_mutex
);
3459 struct drm_i915_gem_object
*i915_gem_alloc_object(struct drm_device
*dev
,
3462 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3463 struct drm_i915_gem_object
*obj
;
3464 struct address_space
*mapping
;
3467 obj
= kzalloc(sizeof(*obj
), GFP_KERNEL
);
3471 if (drm_gem_object_init(dev
, &obj
->base
, size
) != 0) {
3476 mask
= GFP_HIGHUSER
| __GFP_RECLAIMABLE
;
3477 if (IS_CRESTLINE(dev
) || IS_BROADWATER(dev
)) {
3478 /* 965gm cannot relocate objects above 4GiB. */
3479 mask
&= ~__GFP_HIGHMEM
;
3480 mask
|= __GFP_DMA32
;
3483 mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
3484 mapping_set_gfp_mask(mapping
, mask
);
3486 i915_gem_info_add_obj(dev_priv
, size
);
3488 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3489 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3492 /* On some devices, we can have the GPU use the LLC (the CPU
3493 * cache) for about a 10% performance improvement
3494 * compared to uncached. Graphics requests other than
3495 * display scanout are coherent with the CPU in
3496 * accessing this cache. This means in this mode we
3497 * don't need to clflush on the CPU side, and on the
3498 * GPU side we only need to flush internal caches to
3499 * get data visible to the CPU.
3501 * However, we maintain the display planes as UC, and so
3502 * need to rebind when first used as such.
3504 obj
->cache_level
= I915_CACHE_LLC
;
3506 obj
->cache_level
= I915_CACHE_NONE
;
3508 obj
->base
.driver_private
= NULL
;
3509 obj
->fence_reg
= I915_FENCE_REG_NONE
;
3510 INIT_LIST_HEAD(&obj
->mm_list
);
3511 INIT_LIST_HEAD(&obj
->gtt_list
);
3512 INIT_LIST_HEAD(&obj
->ring_list
);
3513 INIT_LIST_HEAD(&obj
->exec_list
);
3514 INIT_LIST_HEAD(&obj
->gpu_write_list
);
3515 obj
->madv
= I915_MADV_WILLNEED
;
3516 /* Avoid an unnecessary call to unbind on the first bind. */
3517 obj
->map_and_fenceable
= true;
3522 int i915_gem_init_object(struct drm_gem_object
*obj
)
3529 void i915_gem_free_object(struct drm_gem_object
*gem_obj
)
3531 struct drm_i915_gem_object
*obj
= to_intel_bo(gem_obj
);
3532 struct drm_device
*dev
= obj
->base
.dev
;
3533 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3535 trace_i915_gem_object_destroy(obj
);
3537 if (gem_obj
->import_attach
)
3538 drm_prime_gem_destroy(gem_obj
, obj
->sg_table
);
3541 i915_gem_detach_phys_object(dev
, obj
);
3544 if (WARN_ON(i915_gem_object_unbind(obj
) == -ERESTARTSYS
)) {
3545 bool was_interruptible
;
3547 was_interruptible
= dev_priv
->mm
.interruptible
;
3548 dev_priv
->mm
.interruptible
= false;
3550 WARN_ON(i915_gem_object_unbind(obj
));
3552 dev_priv
->mm
.interruptible
= was_interruptible
;
3555 if (obj
->base
.map_list
.map
)
3556 drm_gem_free_mmap_offset(&obj
->base
);
3558 drm_gem_object_release(&obj
->base
);
3559 i915_gem_info_remove_obj(dev_priv
, obj
->base
.size
);
3566 i915_gem_idle(struct drm_device
*dev
)
3568 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3571 mutex_lock(&dev
->struct_mutex
);
3573 if (dev_priv
->mm
.suspended
) {
3574 mutex_unlock(&dev
->struct_mutex
);
3578 ret
= i915_gpu_idle(dev
);
3580 mutex_unlock(&dev
->struct_mutex
);
3583 i915_gem_retire_requests(dev
);
3585 /* Under UMS, be paranoid and evict. */
3586 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
3587 i915_gem_evict_everything(dev
, false);
3589 i915_gem_reset_fences(dev
);
3591 /* Hack! Don't let anybody do execbuf while we don't control the chip.
3592 * We need to replace this with a semaphore, or something.
3593 * And not confound mm.suspended!
3595 dev_priv
->mm
.suspended
= 1;
3596 del_timer_sync(&dev_priv
->hangcheck_timer
);
3598 i915_kernel_lost_context(dev
);
3599 i915_gem_cleanup_ringbuffer(dev
);
3601 mutex_unlock(&dev
->struct_mutex
);
3603 /* Cancel the retire work handler, which should be idle now. */
3604 cancel_delayed_work_sync(&dev_priv
->mm
.retire_work
);
3609 void i915_gem_l3_remap(struct drm_device
*dev
)
3611 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3615 if (!IS_IVYBRIDGE(dev
))
3618 if (!dev_priv
->mm
.l3_remap_info
)
3621 misccpctl
= I915_READ(GEN7_MISCCPCTL
);
3622 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
& ~GEN7_DOP_CLOCK_GATE_ENABLE
);
3623 POSTING_READ(GEN7_MISCCPCTL
);
3625 for (i
= 0; i
< GEN7_L3LOG_SIZE
; i
+= 4) {
3626 u32 remap
= I915_READ(GEN7_L3LOG_BASE
+ i
);
3627 if (remap
&& remap
!= dev_priv
->mm
.l3_remap_info
[i
/4])
3628 DRM_DEBUG("0x%x was already programmed to %x\n",
3629 GEN7_L3LOG_BASE
+ i
, remap
);
3630 if (remap
&& !dev_priv
->mm
.l3_remap_info
[i
/4])
3631 DRM_DEBUG_DRIVER("Clearing remapped register\n");
3632 I915_WRITE(GEN7_L3LOG_BASE
+ i
, dev_priv
->mm
.l3_remap_info
[i
/4]);
3635 /* Make sure all the writes land before disabling dop clock gating */
3636 POSTING_READ(GEN7_L3LOG_BASE
);
3638 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
);
3641 void i915_gem_init_swizzling(struct drm_device
*dev
)
3643 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3645 if (INTEL_INFO(dev
)->gen
< 5 ||
3646 dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_NONE
)
3649 I915_WRITE(DISP_ARB_CTL
, I915_READ(DISP_ARB_CTL
) |
3650 DISP_TILE_SURFACE_SWIZZLING
);
3655 I915_WRITE(TILECTL
, I915_READ(TILECTL
) | TILECTL_SWZCTL
);
3657 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB
));
3659 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB
));
3662 void i915_gem_init_ppgtt(struct drm_device
*dev
)
3664 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3666 struct intel_ring_buffer
*ring
;
3667 struct i915_hw_ppgtt
*ppgtt
= dev_priv
->mm
.aliasing_ppgtt
;
3668 uint32_t __iomem
*pd_addr
;
3672 if (!dev_priv
->mm
.aliasing_ppgtt
)
3676 pd_addr
= dev_priv
->mm
.gtt
->gtt
+ ppgtt
->pd_offset
/sizeof(uint32_t);
3677 for (i
= 0; i
< ppgtt
->num_pd_entries
; i
++) {
3680 if (dev_priv
->mm
.gtt
->needs_dmar
)
3681 pt_addr
= ppgtt
->pt_dma_addr
[i
];
3683 pt_addr
= page_to_phys(ppgtt
->pt_pages
[i
]);
3685 pd_entry
= GEN6_PDE_ADDR_ENCODE(pt_addr
);
3686 pd_entry
|= GEN6_PDE_VALID
;
3688 writel(pd_entry
, pd_addr
+ i
);
3692 pd_offset
= ppgtt
->pd_offset
;
3693 pd_offset
/= 64; /* in cachelines, */
3696 if (INTEL_INFO(dev
)->gen
== 6) {
3697 uint32_t ecochk
, gab_ctl
, ecobits
;
3699 ecobits
= I915_READ(GAC_ECO_BITS
);
3700 I915_WRITE(GAC_ECO_BITS
, ecobits
| ECOBITS_PPGTT_CACHE64B
);
3702 gab_ctl
= I915_READ(GAB_CTL
);
3703 I915_WRITE(GAB_CTL
, gab_ctl
| GAB_CTL_CONT_AFTER_PAGEFAULT
);
3705 ecochk
= I915_READ(GAM_ECOCHK
);
3706 I915_WRITE(GAM_ECOCHK
, ecochk
| ECOCHK_SNB_BIT
|
3707 ECOCHK_PPGTT_CACHE64B
);
3708 I915_WRITE(GFX_MODE
, _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE
));
3709 } else if (INTEL_INFO(dev
)->gen
>= 7) {
3710 I915_WRITE(GAM_ECOCHK
, ECOCHK_PPGTT_CACHE64B
);
3711 /* GFX_MODE is per-ring on gen7+ */
3714 for_each_ring(ring
, dev_priv
, i
) {
3715 if (INTEL_INFO(dev
)->gen
>= 7)
3716 I915_WRITE(RING_MODE_GEN7(ring
),
3717 _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE
));
3719 I915_WRITE(RING_PP_DIR_DCLV(ring
), PP_DIR_DCLV_2G
);
3720 I915_WRITE(RING_PP_DIR_BASE(ring
), pd_offset
);
3725 i915_gem_init_hw(struct drm_device
*dev
)
3727 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3730 if (!intel_enable_gtt())
3733 i915_gem_l3_remap(dev
);
3735 i915_gem_init_swizzling(dev
);
3737 ret
= intel_init_render_ring_buffer(dev
);
3742 ret
= intel_init_bsd_ring_buffer(dev
);
3744 goto cleanup_render_ring
;
3748 ret
= intel_init_blt_ring_buffer(dev
);
3750 goto cleanup_bsd_ring
;
3753 dev_priv
->next_seqno
= 1;
3756 * XXX: There was some w/a described somewhere suggesting loading
3757 * contexts before PPGTT.
3759 i915_gem_context_init(dev
);
3760 i915_gem_init_ppgtt(dev
);
3765 intel_cleanup_ring_buffer(&dev_priv
->ring
[VCS
]);
3766 cleanup_render_ring
:
3767 intel_cleanup_ring_buffer(&dev_priv
->ring
[RCS
]);
3772 intel_enable_ppgtt(struct drm_device
*dev
)
3774 if (i915_enable_ppgtt
>= 0)
3775 return i915_enable_ppgtt
;
3777 #ifdef CONFIG_INTEL_IOMMU
3778 /* Disable ppgtt on SNB if VT-d is on. */
3779 if (INTEL_INFO(dev
)->gen
== 6 && intel_iommu_gfx_mapped
)
3786 int i915_gem_init(struct drm_device
*dev
)
3788 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3789 unsigned long gtt_size
, mappable_size
;
3792 gtt_size
= dev_priv
->mm
.gtt
->gtt_total_entries
<< PAGE_SHIFT
;
3793 mappable_size
= dev_priv
->mm
.gtt
->gtt_mappable_entries
<< PAGE_SHIFT
;
3795 mutex_lock(&dev
->struct_mutex
);
3796 if (intel_enable_ppgtt(dev
) && HAS_ALIASING_PPGTT(dev
)) {
3797 /* PPGTT pdes are stolen from global gtt ptes, so shrink the
3798 * aperture accordingly when using aliasing ppgtt. */
3799 gtt_size
-= I915_PPGTT_PD_ENTRIES
*PAGE_SIZE
;
3801 i915_gem_init_global_gtt(dev
, 0, mappable_size
, gtt_size
);
3803 ret
= i915_gem_init_aliasing_ppgtt(dev
);
3805 mutex_unlock(&dev
->struct_mutex
);
3809 /* Let GEM Manage all of the aperture.
3811 * However, leave one page at the end still bound to the scratch
3812 * page. There are a number of places where the hardware
3813 * apparently prefetches past the end of the object, and we've
3814 * seen multiple hangs with the GPU head pointer stuck in a
3815 * batchbuffer bound at the last page of the aperture. One page
3816 * should be enough to keep any prefetching inside of the
3819 i915_gem_init_global_gtt(dev
, 0, mappable_size
,
3823 ret
= i915_gem_init_hw(dev
);
3824 mutex_unlock(&dev
->struct_mutex
);
3826 i915_gem_cleanup_aliasing_ppgtt(dev
);
3830 /* Allow hardware batchbuffers unless told otherwise, but not for KMS. */
3831 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
3832 dev_priv
->dri1
.allow_batchbuffer
= 1;
3837 i915_gem_cleanup_ringbuffer(struct drm_device
*dev
)
3839 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3840 struct intel_ring_buffer
*ring
;
3843 for_each_ring(ring
, dev_priv
, i
)
3844 intel_cleanup_ring_buffer(ring
);
3848 i915_gem_entervt_ioctl(struct drm_device
*dev
, void *data
,
3849 struct drm_file
*file_priv
)
3851 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3854 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
3857 if (atomic_read(&dev_priv
->mm
.wedged
)) {
3858 DRM_ERROR("Reenabling wedged hardware, good luck\n");
3859 atomic_set(&dev_priv
->mm
.wedged
, 0);
3862 mutex_lock(&dev
->struct_mutex
);
3863 dev_priv
->mm
.suspended
= 0;
3865 ret
= i915_gem_init_hw(dev
);
3867 mutex_unlock(&dev
->struct_mutex
);
3871 BUG_ON(!list_empty(&dev_priv
->mm
.active_list
));
3872 BUG_ON(!list_empty(&dev_priv
->mm
.flushing_list
));
3873 BUG_ON(!list_empty(&dev_priv
->mm
.inactive_list
));
3874 mutex_unlock(&dev
->struct_mutex
);
3876 ret
= drm_irq_install(dev
);
3878 goto cleanup_ringbuffer
;
3883 mutex_lock(&dev
->struct_mutex
);
3884 i915_gem_cleanup_ringbuffer(dev
);
3885 dev_priv
->mm
.suspended
= 1;
3886 mutex_unlock(&dev
->struct_mutex
);
3892 i915_gem_leavevt_ioctl(struct drm_device
*dev
, void *data
,
3893 struct drm_file
*file_priv
)
3895 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
3898 drm_irq_uninstall(dev
);
3899 return i915_gem_idle(dev
);
3903 i915_gem_lastclose(struct drm_device
*dev
)
3907 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
3910 ret
= i915_gem_idle(dev
);
3912 DRM_ERROR("failed to idle hardware: %d\n", ret
);
3916 init_ring_lists(struct intel_ring_buffer
*ring
)
3918 INIT_LIST_HEAD(&ring
->active_list
);
3919 INIT_LIST_HEAD(&ring
->request_list
);
3920 INIT_LIST_HEAD(&ring
->gpu_write_list
);
3924 i915_gem_load(struct drm_device
*dev
)
3927 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3929 INIT_LIST_HEAD(&dev_priv
->mm
.active_list
);
3930 INIT_LIST_HEAD(&dev_priv
->mm
.flushing_list
);
3931 INIT_LIST_HEAD(&dev_priv
->mm
.inactive_list
);
3932 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
3933 INIT_LIST_HEAD(&dev_priv
->mm
.gtt_list
);
3934 for (i
= 0; i
< I915_NUM_RINGS
; i
++)
3935 init_ring_lists(&dev_priv
->ring
[i
]);
3936 for (i
= 0; i
< I915_MAX_NUM_FENCES
; i
++)
3937 INIT_LIST_HEAD(&dev_priv
->fence_regs
[i
].lru_list
);
3938 INIT_DELAYED_WORK(&dev_priv
->mm
.retire_work
,
3939 i915_gem_retire_work_handler
);
3940 init_completion(&dev_priv
->error_completion
);
3942 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
3944 I915_WRITE(MI_ARB_STATE
,
3945 _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE
));
3948 dev_priv
->relative_constants_mode
= I915_EXEC_CONSTANTS_REL_GENERAL
;
3950 /* Old X drivers will take 0-2 for front, back, depth buffers */
3951 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
3952 dev_priv
->fence_reg_start
= 3;
3954 if (INTEL_INFO(dev
)->gen
>= 4 || IS_I945G(dev
) || IS_I945GM(dev
) || IS_G33(dev
))
3955 dev_priv
->num_fence_regs
= 16;
3957 dev_priv
->num_fence_regs
= 8;
3959 /* Initialize fence registers to zero */
3960 i915_gem_reset_fences(dev
);
3962 i915_gem_detect_bit_6_swizzle(dev
);
3963 init_waitqueue_head(&dev_priv
->pending_flip_queue
);
3965 dev_priv
->mm
.interruptible
= true;
3967 dev_priv
->mm
.inactive_shrinker
.shrink
= i915_gem_inactive_shrink
;
3968 dev_priv
->mm
.inactive_shrinker
.seeks
= DEFAULT_SEEKS
;
3969 register_shrinker(&dev_priv
->mm
.inactive_shrinker
);
3973 * Create a physically contiguous memory object for this object
3974 * e.g. for cursor + overlay regs
3976 static int i915_gem_init_phys_object(struct drm_device
*dev
,
3977 int id
, int size
, int align
)
3979 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3980 struct drm_i915_gem_phys_object
*phys_obj
;
3983 if (dev_priv
->mm
.phys_objs
[id
- 1] || !size
)
3986 phys_obj
= kzalloc(sizeof(struct drm_i915_gem_phys_object
), GFP_KERNEL
);
3992 phys_obj
->handle
= drm_pci_alloc(dev
, size
, align
);
3993 if (!phys_obj
->handle
) {
3998 set_memory_wc((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
4001 dev_priv
->mm
.phys_objs
[id
- 1] = phys_obj
;
4009 static void i915_gem_free_phys_object(struct drm_device
*dev
, int id
)
4011 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4012 struct drm_i915_gem_phys_object
*phys_obj
;
4014 if (!dev_priv
->mm
.phys_objs
[id
- 1])
4017 phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4018 if (phys_obj
->cur_obj
) {
4019 i915_gem_detach_phys_object(dev
, phys_obj
->cur_obj
);
4023 set_memory_wb((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
4025 drm_pci_free(dev
, phys_obj
->handle
);
4027 dev_priv
->mm
.phys_objs
[id
- 1] = NULL
;
4030 void i915_gem_free_all_phys_object(struct drm_device
*dev
)
4034 for (i
= I915_GEM_PHYS_CURSOR_0
; i
<= I915_MAX_PHYS_OBJECT
; i
++)
4035 i915_gem_free_phys_object(dev
, i
);
4038 void i915_gem_detach_phys_object(struct drm_device
*dev
,
4039 struct drm_i915_gem_object
*obj
)
4041 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
4048 vaddr
= obj
->phys_obj
->handle
->vaddr
;
4050 page_count
= obj
->base
.size
/ PAGE_SIZE
;
4051 for (i
= 0; i
< page_count
; i
++) {
4052 struct page
*page
= shmem_read_mapping_page(mapping
, i
);
4053 if (!IS_ERR(page
)) {
4054 char *dst
= kmap_atomic(page
);
4055 memcpy(dst
, vaddr
+ i
*PAGE_SIZE
, PAGE_SIZE
);
4058 drm_clflush_pages(&page
, 1);
4060 set_page_dirty(page
);
4061 mark_page_accessed(page
);
4062 page_cache_release(page
);
4065 intel_gtt_chipset_flush();
4067 obj
->phys_obj
->cur_obj
= NULL
;
4068 obj
->phys_obj
= NULL
;
4072 i915_gem_attach_phys_object(struct drm_device
*dev
,
4073 struct drm_i915_gem_object
*obj
,
4077 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
4078 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4083 if (id
> I915_MAX_PHYS_OBJECT
)
4086 if (obj
->phys_obj
) {
4087 if (obj
->phys_obj
->id
== id
)
4089 i915_gem_detach_phys_object(dev
, obj
);
4092 /* create a new object */
4093 if (!dev_priv
->mm
.phys_objs
[id
- 1]) {
4094 ret
= i915_gem_init_phys_object(dev
, id
,
4095 obj
->base
.size
, align
);
4097 DRM_ERROR("failed to init phys object %d size: %zu\n",
4098 id
, obj
->base
.size
);
4103 /* bind to the object */
4104 obj
->phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4105 obj
->phys_obj
->cur_obj
= obj
;
4107 page_count
= obj
->base
.size
/ PAGE_SIZE
;
4109 for (i
= 0; i
< page_count
; i
++) {
4113 page
= shmem_read_mapping_page(mapping
, i
);
4115 return PTR_ERR(page
);
4117 src
= kmap_atomic(page
);
4118 dst
= obj
->phys_obj
->handle
->vaddr
+ (i
* PAGE_SIZE
);
4119 memcpy(dst
, src
, PAGE_SIZE
);
4122 mark_page_accessed(page
);
4123 page_cache_release(page
);
4130 i915_gem_phys_pwrite(struct drm_device
*dev
,
4131 struct drm_i915_gem_object
*obj
,
4132 struct drm_i915_gem_pwrite
*args
,
4133 struct drm_file
*file_priv
)
4135 void *vaddr
= obj
->phys_obj
->handle
->vaddr
+ args
->offset
;
4136 char __user
*user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
4138 if (__copy_from_user_inatomic_nocache(vaddr
, user_data
, args
->size
)) {
4139 unsigned long unwritten
;
4141 /* The physical object once assigned is fixed for the lifetime
4142 * of the obj, so we can safely drop the lock and continue
4145 mutex_unlock(&dev
->struct_mutex
);
4146 unwritten
= copy_from_user(vaddr
, user_data
, args
->size
);
4147 mutex_lock(&dev
->struct_mutex
);
4152 intel_gtt_chipset_flush();
4156 void i915_gem_release(struct drm_device
*dev
, struct drm_file
*file
)
4158 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
4160 /* Clean up our request list when the client is going away, so that
4161 * later retire_requests won't dereference our soon-to-be-gone
4164 spin_lock(&file_priv
->mm
.lock
);
4165 while (!list_empty(&file_priv
->mm
.request_list
)) {
4166 struct drm_i915_gem_request
*request
;
4168 request
= list_first_entry(&file_priv
->mm
.request_list
,
4169 struct drm_i915_gem_request
,
4171 list_del(&request
->client_list
);
4172 request
->file_priv
= NULL
;
4174 spin_unlock(&file_priv
->mm
.lock
);
4178 i915_gpu_is_active(struct drm_device
*dev
)
4180 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4183 lists_empty
= list_empty(&dev_priv
->mm
.flushing_list
) &&
4184 list_empty(&dev_priv
->mm
.active_list
);
4186 return !lists_empty
;
4190 i915_gem_inactive_shrink(struct shrinker
*shrinker
, struct shrink_control
*sc
)
4192 struct drm_i915_private
*dev_priv
=
4193 container_of(shrinker
,
4194 struct drm_i915_private
,
4195 mm
.inactive_shrinker
);
4196 struct drm_device
*dev
= dev_priv
->dev
;
4197 struct drm_i915_gem_object
*obj
, *next
;
4198 int nr_to_scan
= sc
->nr_to_scan
;
4201 if (!mutex_trylock(&dev
->struct_mutex
))
4204 /* "fast-path" to count number of available objects */
4205 if (nr_to_scan
== 0) {
4207 list_for_each_entry(obj
,
4208 &dev_priv
->mm
.inactive_list
,
4211 mutex_unlock(&dev
->struct_mutex
);
4212 return cnt
/ 100 * sysctl_vfs_cache_pressure
;
4216 /* first scan for clean buffers */
4217 i915_gem_retire_requests(dev
);
4219 list_for_each_entry_safe(obj
, next
,
4220 &dev_priv
->mm
.inactive_list
,
4222 if (i915_gem_object_is_purgeable(obj
)) {
4223 if (i915_gem_object_unbind(obj
) == 0 &&
4229 /* second pass, evict/count anything still on the inactive list */
4231 list_for_each_entry_safe(obj
, next
,
4232 &dev_priv
->mm
.inactive_list
,
4235 i915_gem_object_unbind(obj
) == 0)
4241 if (nr_to_scan
&& i915_gpu_is_active(dev
)) {
4243 * We are desperate for pages, so as a last resort, wait
4244 * for the GPU to finish and discard whatever we can.
4245 * This has a dramatic impact to reduce the number of
4246 * OOM-killer events whilst running the GPU aggressively.
4248 if (i915_gpu_idle(dev
) == 0)
4251 mutex_unlock(&dev
->struct_mutex
);
4252 return cnt
/ 100 * sysctl_vfs_cache_pressure
;