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>
29 #include <drm/i915_drm.h>
31 #include "i915_trace.h"
32 #include "intel_drv.h"
33 #include <linux/shmem_fs.h>
34 #include <linux/slab.h>
35 #include <linux/swap.h>
36 #include <linux/pci.h>
37 #include <linux/dma-buf.h>
39 static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
);
40 static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
);
41 static __must_check
int i915_gem_object_bind_to_gtt(struct drm_i915_gem_object
*obj
,
43 bool map_and_fenceable
,
45 static int i915_gem_phys_pwrite(struct drm_device
*dev
,
46 struct drm_i915_gem_object
*obj
,
47 struct drm_i915_gem_pwrite
*args
,
48 struct drm_file
*file
);
50 static void i915_gem_write_fence(struct drm_device
*dev
, int reg
,
51 struct drm_i915_gem_object
*obj
);
52 static void i915_gem_object_update_fence(struct drm_i915_gem_object
*obj
,
53 struct drm_i915_fence_reg
*fence
,
56 static int i915_gem_inactive_shrink(struct shrinker
*shrinker
,
57 struct shrink_control
*sc
);
58 static long i915_gem_purge(struct drm_i915_private
*dev_priv
, long target
);
59 static void i915_gem_shrink_all(struct drm_i915_private
*dev_priv
);
60 static void i915_gem_object_truncate(struct drm_i915_gem_object
*obj
);
62 static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object
*obj
)
65 i915_gem_release_mmap(obj
);
67 /* As we do not have an associated fence register, we will force
68 * a tiling change if we ever need to acquire one.
70 obj
->fence_dirty
= false;
71 obj
->fence_reg
= I915_FENCE_REG_NONE
;
74 /* some bookkeeping */
75 static void i915_gem_info_add_obj(struct drm_i915_private
*dev_priv
,
78 dev_priv
->mm
.object_count
++;
79 dev_priv
->mm
.object_memory
+= size
;
82 static void i915_gem_info_remove_obj(struct drm_i915_private
*dev_priv
,
85 dev_priv
->mm
.object_count
--;
86 dev_priv
->mm
.object_memory
-= size
;
90 i915_gem_wait_for_error(struct drm_device
*dev
)
92 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
93 struct completion
*x
= &dev_priv
->error_completion
;
97 if (!atomic_read(&dev_priv
->mm
.wedged
))
101 * Only wait 10 seconds for the gpu reset to complete to avoid hanging
102 * userspace. If it takes that long something really bad is going on and
103 * we should simply try to bail out and fail as gracefully as possible.
105 ret
= wait_for_completion_interruptible_timeout(x
, 10*HZ
);
107 DRM_ERROR("Timed out waiting for the gpu reset to complete\n");
109 } else if (ret
< 0) {
113 if (atomic_read(&dev_priv
->mm
.wedged
)) {
114 /* GPU is hung, bump the completion count to account for
115 * the token we just consumed so that we never hit zero and
116 * end up waiting upon a subsequent completion event that
119 spin_lock_irqsave(&x
->wait
.lock
, flags
);
121 spin_unlock_irqrestore(&x
->wait
.lock
, flags
);
126 int i915_mutex_lock_interruptible(struct drm_device
*dev
)
130 ret
= i915_gem_wait_for_error(dev
);
134 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
138 WARN_ON(i915_verify_lists(dev
));
143 i915_gem_object_is_inactive(struct drm_i915_gem_object
*obj
)
145 return obj
->gtt_space
&& !obj
->active
;
149 i915_gem_init_ioctl(struct drm_device
*dev
, void *data
,
150 struct drm_file
*file
)
152 struct drm_i915_gem_init
*args
= data
;
154 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
157 if (args
->gtt_start
>= args
->gtt_end
||
158 (args
->gtt_end
| args
->gtt_start
) & (PAGE_SIZE
- 1))
161 /* GEM with user mode setting was never supported on ilk and later. */
162 if (INTEL_INFO(dev
)->gen
>= 5)
165 mutex_lock(&dev
->struct_mutex
);
166 i915_gem_init_global_gtt(dev
, args
->gtt_start
,
167 args
->gtt_end
, args
->gtt_end
);
168 mutex_unlock(&dev
->struct_mutex
);
174 i915_gem_get_aperture_ioctl(struct drm_device
*dev
, void *data
,
175 struct drm_file
*file
)
177 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
178 struct drm_i915_gem_get_aperture
*args
= data
;
179 struct drm_i915_gem_object
*obj
;
183 mutex_lock(&dev
->struct_mutex
);
184 list_for_each_entry(obj
, &dev_priv
->mm
.bound_list
, gtt_list
)
186 pinned
+= obj
->gtt_space
->size
;
187 mutex_unlock(&dev
->struct_mutex
);
189 args
->aper_size
= dev_priv
->mm
.gtt_total
;
190 args
->aper_available_size
= args
->aper_size
- pinned
;
196 i915_gem_create(struct drm_file
*file
,
197 struct drm_device
*dev
,
201 struct drm_i915_gem_object
*obj
;
205 size
= roundup(size
, PAGE_SIZE
);
209 /* Allocate the new object */
210 obj
= i915_gem_alloc_object(dev
, size
);
214 ret
= drm_gem_handle_create(file
, &obj
->base
, &handle
);
216 drm_gem_object_release(&obj
->base
);
217 i915_gem_info_remove_obj(dev
->dev_private
, obj
->base
.size
);
222 /* drop reference from allocate - handle holds it now */
223 drm_gem_object_unreference(&obj
->base
);
224 trace_i915_gem_object_create(obj
);
231 i915_gem_dumb_create(struct drm_file
*file
,
232 struct drm_device
*dev
,
233 struct drm_mode_create_dumb
*args
)
235 /* have to work out size/pitch and return them */
236 args
->pitch
= ALIGN(args
->width
* ((args
->bpp
+ 7) / 8), 64);
237 args
->size
= args
->pitch
* args
->height
;
238 return i915_gem_create(file
, dev
,
239 args
->size
, &args
->handle
);
242 int i915_gem_dumb_destroy(struct drm_file
*file
,
243 struct drm_device
*dev
,
246 return drm_gem_handle_delete(file
, handle
);
250 * Creates a new mm object and returns a handle to it.
253 i915_gem_create_ioctl(struct drm_device
*dev
, void *data
,
254 struct drm_file
*file
)
256 struct drm_i915_gem_create
*args
= data
;
258 return i915_gem_create(file
, dev
,
259 args
->size
, &args
->handle
);
262 static int i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object
*obj
)
264 drm_i915_private_t
*dev_priv
= obj
->base
.dev
->dev_private
;
266 return dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_9_10_17
&&
267 obj
->tiling_mode
!= I915_TILING_NONE
;
271 __copy_to_user_swizzled(char __user
*cpu_vaddr
,
272 const char *gpu_vaddr
, int gpu_offset
,
275 int ret
, cpu_offset
= 0;
278 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
279 int this_length
= min(cacheline_end
- gpu_offset
, length
);
280 int swizzled_gpu_offset
= gpu_offset
^ 64;
282 ret
= __copy_to_user(cpu_vaddr
+ cpu_offset
,
283 gpu_vaddr
+ swizzled_gpu_offset
,
288 cpu_offset
+= this_length
;
289 gpu_offset
+= this_length
;
290 length
-= this_length
;
297 __copy_from_user_swizzled(char *gpu_vaddr
, int gpu_offset
,
298 const char __user
*cpu_vaddr
,
301 int ret
, cpu_offset
= 0;
304 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
305 int this_length
= min(cacheline_end
- gpu_offset
, length
);
306 int swizzled_gpu_offset
= gpu_offset
^ 64;
308 ret
= __copy_from_user(gpu_vaddr
+ swizzled_gpu_offset
,
309 cpu_vaddr
+ cpu_offset
,
314 cpu_offset
+= this_length
;
315 gpu_offset
+= this_length
;
316 length
-= this_length
;
322 /* Per-page copy function for the shmem pread fastpath.
323 * Flushes invalid cachelines before reading the target if
324 * needs_clflush is set. */
326 shmem_pread_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
327 char __user
*user_data
,
328 bool page_do_bit17_swizzling
, bool needs_clflush
)
333 if (unlikely(page_do_bit17_swizzling
))
336 vaddr
= kmap_atomic(page
);
338 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
340 ret
= __copy_to_user_inatomic(user_data
,
341 vaddr
+ shmem_page_offset
,
343 kunmap_atomic(vaddr
);
345 return ret
? -EFAULT
: 0;
349 shmem_clflush_swizzled_range(char *addr
, unsigned long length
,
352 if (unlikely(swizzled
)) {
353 unsigned long start
= (unsigned long) addr
;
354 unsigned long end
= (unsigned long) addr
+ length
;
356 /* For swizzling simply ensure that we always flush both
357 * channels. Lame, but simple and it works. Swizzled
358 * pwrite/pread is far from a hotpath - current userspace
359 * doesn't use it at all. */
360 start
= round_down(start
, 128);
361 end
= round_up(end
, 128);
363 drm_clflush_virt_range((void *)start
, end
- start
);
365 drm_clflush_virt_range(addr
, length
);
370 /* Only difference to the fast-path function is that this can handle bit17
371 * and uses non-atomic copy and kmap functions. */
373 shmem_pread_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
374 char __user
*user_data
,
375 bool page_do_bit17_swizzling
, bool needs_clflush
)
382 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
384 page_do_bit17_swizzling
);
386 if (page_do_bit17_swizzling
)
387 ret
= __copy_to_user_swizzled(user_data
,
388 vaddr
, shmem_page_offset
,
391 ret
= __copy_to_user(user_data
,
392 vaddr
+ shmem_page_offset
,
396 return ret
? - EFAULT
: 0;
400 i915_gem_shmem_pread(struct drm_device
*dev
,
401 struct drm_i915_gem_object
*obj
,
402 struct drm_i915_gem_pread
*args
,
403 struct drm_file
*file
)
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;
413 struct scatterlist
*sg
;
416 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
419 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
421 if (!(obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
)) {
422 /* If we're not in the cpu read domain, set ourself into the gtt
423 * read domain and manually flush cachelines (if required). This
424 * optimizes for the case when the gpu will dirty the data
425 * anyway again before the next pread happens. */
426 if (obj
->cache_level
== I915_CACHE_NONE
)
428 if (obj
->gtt_space
) {
429 ret
= i915_gem_object_set_to_gtt_domain(obj
, false);
435 ret
= i915_gem_object_get_pages(obj
);
439 i915_gem_object_pin_pages(obj
);
441 offset
= args
->offset
;
443 for_each_sg(obj
->pages
->sgl
, sg
, obj
->pages
->nents
, i
) {
446 if (i
< offset
>> PAGE_SHIFT
)
452 /* Operation in this page
454 * shmem_page_offset = offset within page in shmem file
455 * page_length = bytes to copy for this page
457 shmem_page_offset
= offset_in_page(offset
);
458 page_length
= remain
;
459 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
460 page_length
= PAGE_SIZE
- shmem_page_offset
;
463 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
464 (page_to_phys(page
) & (1 << 17)) != 0;
466 ret
= shmem_pread_fast(page
, shmem_page_offset
, page_length
,
467 user_data
, page_do_bit17_swizzling
,
473 mutex_unlock(&dev
->struct_mutex
);
476 ret
= fault_in_multipages_writeable(user_data
, remain
);
477 /* Userspace is tricking us, but we've already clobbered
478 * its pages with the prefault and promised to write the
479 * data up to the first fault. Hence ignore any errors
480 * and just continue. */
485 ret
= shmem_pread_slow(page
, shmem_page_offset
, page_length
,
486 user_data
, page_do_bit17_swizzling
,
489 mutex_lock(&dev
->struct_mutex
);
492 mark_page_accessed(page
);
497 remain
-= page_length
;
498 user_data
+= page_length
;
499 offset
+= page_length
;
503 i915_gem_object_unpin_pages(obj
);
506 /* Fixup: Kill any reinstated backing storage pages */
507 if (obj
->madv
== __I915_MADV_PURGED
)
508 i915_gem_object_truncate(obj
);
515 * Reads data from the object referenced by handle.
517 * On error, the contents of *data are undefined.
520 i915_gem_pread_ioctl(struct drm_device
*dev
, void *data
,
521 struct drm_file
*file
)
523 struct drm_i915_gem_pread
*args
= data
;
524 struct drm_i915_gem_object
*obj
;
530 if (!access_ok(VERIFY_WRITE
,
531 (char __user
*)(uintptr_t)args
->data_ptr
,
535 ret
= i915_mutex_lock_interruptible(dev
);
539 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
540 if (&obj
->base
== NULL
) {
545 /* Bounds check source. */
546 if (args
->offset
> obj
->base
.size
||
547 args
->size
> obj
->base
.size
- args
->offset
) {
552 /* prime objects have no backing filp to GEM pread/pwrite
555 if (!obj
->base
.filp
) {
560 trace_i915_gem_object_pread(obj
, args
->offset
, args
->size
);
562 ret
= i915_gem_shmem_pread(dev
, obj
, args
, file
);
565 drm_gem_object_unreference(&obj
->base
);
567 mutex_unlock(&dev
->struct_mutex
);
571 /* This is the fast write path which cannot handle
572 * page faults in the source data
576 fast_user_write(struct io_mapping
*mapping
,
577 loff_t page_base
, int page_offset
,
578 char __user
*user_data
,
581 void __iomem
*vaddr_atomic
;
583 unsigned long unwritten
;
585 vaddr_atomic
= io_mapping_map_atomic_wc(mapping
, page_base
);
586 /* We can use the cpu mem copy function because this is X86. */
587 vaddr
= (void __force
*)vaddr_atomic
+ page_offset
;
588 unwritten
= __copy_from_user_inatomic_nocache(vaddr
,
590 io_mapping_unmap_atomic(vaddr_atomic
);
595 * This is the fast pwrite path, where we copy the data directly from the
596 * user into the GTT, uncached.
599 i915_gem_gtt_pwrite_fast(struct drm_device
*dev
,
600 struct drm_i915_gem_object
*obj
,
601 struct drm_i915_gem_pwrite
*args
,
602 struct drm_file
*file
)
604 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
606 loff_t offset
, page_base
;
607 char __user
*user_data
;
608 int page_offset
, page_length
, ret
;
610 ret
= i915_gem_object_pin(obj
, 0, true, true);
614 ret
= i915_gem_object_set_to_gtt_domain(obj
, true);
618 ret
= i915_gem_object_put_fence(obj
);
622 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
625 offset
= obj
->gtt_offset
+ args
->offset
;
628 /* Operation in this page
630 * page_base = page offset within aperture
631 * page_offset = offset within page
632 * page_length = bytes to copy for this page
634 page_base
= offset
& PAGE_MASK
;
635 page_offset
= offset_in_page(offset
);
636 page_length
= remain
;
637 if ((page_offset
+ remain
) > PAGE_SIZE
)
638 page_length
= PAGE_SIZE
- page_offset
;
640 /* If we get a fault while copying data, then (presumably) our
641 * source page isn't available. Return the error and we'll
642 * retry in the slow path.
644 if (fast_user_write(dev_priv
->mm
.gtt_mapping
, page_base
,
645 page_offset
, user_data
, page_length
)) {
650 remain
-= page_length
;
651 user_data
+= page_length
;
652 offset
+= page_length
;
656 i915_gem_object_unpin(obj
);
661 /* Per-page copy function for the shmem pwrite fastpath.
662 * Flushes invalid cachelines before writing to the target if
663 * needs_clflush_before is set and flushes out any written cachelines after
664 * writing if needs_clflush is set. */
666 shmem_pwrite_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
667 char __user
*user_data
,
668 bool page_do_bit17_swizzling
,
669 bool needs_clflush_before
,
670 bool needs_clflush_after
)
675 if (unlikely(page_do_bit17_swizzling
))
678 vaddr
= kmap_atomic(page
);
679 if (needs_clflush_before
)
680 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
682 ret
= __copy_from_user_inatomic_nocache(vaddr
+ shmem_page_offset
,
685 if (needs_clflush_after
)
686 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
688 kunmap_atomic(vaddr
);
690 return ret
? -EFAULT
: 0;
693 /* Only difference to the fast-path function is that this can handle bit17
694 * and uses non-atomic copy and kmap functions. */
696 shmem_pwrite_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
697 char __user
*user_data
,
698 bool page_do_bit17_swizzling
,
699 bool needs_clflush_before
,
700 bool needs_clflush_after
)
706 if (unlikely(needs_clflush_before
|| page_do_bit17_swizzling
))
707 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
709 page_do_bit17_swizzling
);
710 if (page_do_bit17_swizzling
)
711 ret
= __copy_from_user_swizzled(vaddr
, shmem_page_offset
,
715 ret
= __copy_from_user(vaddr
+ shmem_page_offset
,
718 if (needs_clflush_after
)
719 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
721 page_do_bit17_swizzling
);
724 return ret
? -EFAULT
: 0;
728 i915_gem_shmem_pwrite(struct drm_device
*dev
,
729 struct drm_i915_gem_object
*obj
,
730 struct drm_i915_gem_pwrite
*args
,
731 struct drm_file
*file
)
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;
742 struct scatterlist
*sg
;
744 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
747 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
749 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
750 /* If we're not in the cpu write domain, set ourself into the gtt
751 * write domain and manually flush cachelines (if required). This
752 * optimizes for the case when the gpu will use the data
753 * right away and we therefore have to clflush anyway. */
754 if (obj
->cache_level
== I915_CACHE_NONE
)
755 needs_clflush_after
= 1;
756 if (obj
->gtt_space
) {
757 ret
= i915_gem_object_set_to_gtt_domain(obj
, true);
762 /* Same trick applies for invalidate partially written cachelines before
764 if (!(obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
)
765 && obj
->cache_level
== I915_CACHE_NONE
)
766 needs_clflush_before
= 1;
768 ret
= i915_gem_object_get_pages(obj
);
772 i915_gem_object_pin_pages(obj
);
774 offset
= args
->offset
;
777 for_each_sg(obj
->pages
->sgl
, sg
, obj
->pages
->nents
, i
) {
779 int partial_cacheline_write
;
781 if (i
< offset
>> PAGE_SHIFT
)
787 /* Operation in this page
789 * shmem_page_offset = offset within page in shmem file
790 * page_length = bytes to copy for this page
792 shmem_page_offset
= offset_in_page(offset
);
794 page_length
= remain
;
795 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
796 page_length
= PAGE_SIZE
- shmem_page_offset
;
798 /* If we don't overwrite a cacheline completely we need to be
799 * careful to have up-to-date data by first clflushing. Don't
800 * overcomplicate things and flush the entire patch. */
801 partial_cacheline_write
= needs_clflush_before
&&
802 ((shmem_page_offset
| page_length
)
803 & (boot_cpu_data
.x86_clflush_size
- 1));
806 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
807 (page_to_phys(page
) & (1 << 17)) != 0;
809 ret
= shmem_pwrite_fast(page
, shmem_page_offset
, page_length
,
810 user_data
, page_do_bit17_swizzling
,
811 partial_cacheline_write
,
812 needs_clflush_after
);
817 mutex_unlock(&dev
->struct_mutex
);
818 ret
= shmem_pwrite_slow(page
, shmem_page_offset
, page_length
,
819 user_data
, page_do_bit17_swizzling
,
820 partial_cacheline_write
,
821 needs_clflush_after
);
823 mutex_lock(&dev
->struct_mutex
);
826 set_page_dirty(page
);
827 mark_page_accessed(page
);
832 remain
-= page_length
;
833 user_data
+= page_length
;
834 offset
+= page_length
;
838 i915_gem_object_unpin_pages(obj
);
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 i915_gem_chipset_flush(dev
);
852 if (needs_clflush_after
)
853 i915_gem_chipset_flush(dev
);
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
->cache_level
== I915_CACHE_NONE
&&
924 obj
->tiling_mode
== I915_TILING_NONE
&&
925 obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
926 ret
= i915_gem_gtt_pwrite_fast(dev
, obj
, args
, file
);
927 /* Note that the gtt paths might fail with non-page-backed user
928 * pointers (e.g. gtt mappings when moving data between
929 * textures). Fallback to the shmem path in that case. */
932 if (ret
== -EFAULT
|| ret
== -ENOSPC
)
933 ret
= i915_gem_shmem_pwrite(dev
, obj
, args
, file
);
936 drm_gem_object_unreference(&obj
->base
);
938 mutex_unlock(&dev
->struct_mutex
);
943 i915_gem_check_wedge(struct drm_i915_private
*dev_priv
,
946 if (atomic_read(&dev_priv
->mm
.wedged
)) {
947 struct completion
*x
= &dev_priv
->error_completion
;
948 bool recovery_complete
;
951 /* Give the error handler a chance to run. */
952 spin_lock_irqsave(&x
->wait
.lock
, flags
);
953 recovery_complete
= x
->done
> 0;
954 spin_unlock_irqrestore(&x
->wait
.lock
, flags
);
956 /* Non-interruptible callers can't handle -EAGAIN, hence return
957 * -EIO unconditionally for these. */
961 /* Recovery complete, but still wedged means reset failure. */
962 if (recovery_complete
)
972 * Compare seqno against outstanding lazy request. Emit a request if they are
976 i915_gem_check_olr(struct intel_ring_buffer
*ring
, u32 seqno
)
980 BUG_ON(!mutex_is_locked(&ring
->dev
->struct_mutex
));
983 if (seqno
== ring
->outstanding_lazy_request
)
984 ret
= i915_add_request(ring
, NULL
, NULL
);
990 * __wait_seqno - wait until execution of seqno has finished
991 * @ring: the ring expected to report seqno
993 * @interruptible: do an interruptible wait (normally yes)
994 * @timeout: in - how long to wait (NULL forever); out - how much time remaining
996 * Returns 0 if the seqno was found within the alloted time. Else returns the
997 * errno with remaining time filled in timeout argument.
999 static int __wait_seqno(struct intel_ring_buffer
*ring
, u32 seqno
,
1000 bool interruptible
, struct timespec
*timeout
)
1002 drm_i915_private_t
*dev_priv
= ring
->dev
->dev_private
;
1003 struct timespec before
, now
, wait_time
={1,0};
1004 unsigned long timeout_jiffies
;
1006 bool wait_forever
= true;
1009 if (i915_seqno_passed(ring
->get_seqno(ring
, true), seqno
))
1012 trace_i915_gem_request_wait_begin(ring
, seqno
);
1014 if (timeout
!= NULL
) {
1015 wait_time
= *timeout
;
1016 wait_forever
= false;
1019 timeout_jiffies
= timespec_to_jiffies(&wait_time
);
1021 if (WARN_ON(!ring
->irq_get(ring
)))
1024 /* Record current time in case interrupted by signal, or wedged * */
1025 getrawmonotonic(&before
);
1028 (i915_seqno_passed(ring->get_seqno(ring, false), seqno) || \
1029 atomic_read(&dev_priv->mm.wedged))
1032 end
= wait_event_interruptible_timeout(ring
->irq_queue
,
1036 end
= wait_event_timeout(ring
->irq_queue
, EXIT_COND
,
1039 ret
= i915_gem_check_wedge(dev_priv
, interruptible
);
1042 } while (end
== 0 && wait_forever
);
1044 getrawmonotonic(&now
);
1046 ring
->irq_put(ring
);
1047 trace_i915_gem_request_wait_end(ring
, seqno
);
1051 struct timespec sleep_time
= timespec_sub(now
, before
);
1052 *timeout
= timespec_sub(*timeout
, sleep_time
);
1057 case -EAGAIN
: /* Wedged */
1058 case -ERESTARTSYS
: /* Signal */
1060 case 0: /* Timeout */
1062 set_normalized_timespec(timeout
, 0, 0);
1064 default: /* Completed */
1065 WARN_ON(end
< 0); /* We're not aware of other errors */
1071 * Waits for a sequence number to be signaled, and cleans up the
1072 * request and object lists appropriately for that event.
1075 i915_wait_seqno(struct intel_ring_buffer
*ring
, uint32_t seqno
)
1077 struct drm_device
*dev
= ring
->dev
;
1078 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1079 bool interruptible
= dev_priv
->mm
.interruptible
;
1082 BUG_ON(!mutex_is_locked(&dev
->struct_mutex
));
1085 ret
= i915_gem_check_wedge(dev_priv
, interruptible
);
1089 ret
= i915_gem_check_olr(ring
, seqno
);
1093 return __wait_seqno(ring
, seqno
, interruptible
, NULL
);
1097 * Ensures that all rendering to the object has completed and the object is
1098 * safe to unbind from the GTT or access from the CPU.
1100 static __must_check
int
1101 i915_gem_object_wait_rendering(struct drm_i915_gem_object
*obj
,
1104 struct intel_ring_buffer
*ring
= obj
->ring
;
1108 seqno
= readonly
? obj
->last_write_seqno
: obj
->last_read_seqno
;
1112 ret
= i915_wait_seqno(ring
, seqno
);
1116 i915_gem_retire_requests_ring(ring
);
1118 /* Manually manage the write flush as we may have not yet
1119 * retired the buffer.
1121 if (obj
->last_write_seqno
&&
1122 i915_seqno_passed(seqno
, obj
->last_write_seqno
)) {
1123 obj
->last_write_seqno
= 0;
1124 obj
->base
.write_domain
&= ~I915_GEM_GPU_DOMAINS
;
1130 /* A nonblocking variant of the above wait. This is a highly dangerous routine
1131 * as the object state may change during this call.
1133 static __must_check
int
1134 i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object
*obj
,
1137 struct drm_device
*dev
= obj
->base
.dev
;
1138 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1139 struct intel_ring_buffer
*ring
= obj
->ring
;
1143 BUG_ON(!mutex_is_locked(&dev
->struct_mutex
));
1144 BUG_ON(!dev_priv
->mm
.interruptible
);
1146 seqno
= readonly
? obj
->last_write_seqno
: obj
->last_read_seqno
;
1150 ret
= i915_gem_check_wedge(dev_priv
, true);
1154 ret
= i915_gem_check_olr(ring
, seqno
);
1158 mutex_unlock(&dev
->struct_mutex
);
1159 ret
= __wait_seqno(ring
, seqno
, true, NULL
);
1160 mutex_lock(&dev
->struct_mutex
);
1162 i915_gem_retire_requests_ring(ring
);
1164 /* Manually manage the write flush as we may have not yet
1165 * retired the buffer.
1167 if (obj
->last_write_seqno
&&
1168 i915_seqno_passed(seqno
, obj
->last_write_seqno
)) {
1169 obj
->last_write_seqno
= 0;
1170 obj
->base
.write_domain
&= ~I915_GEM_GPU_DOMAINS
;
1177 * Called when user space prepares to use an object with the CPU, either
1178 * through the mmap ioctl's mapping or a GTT mapping.
1181 i915_gem_set_domain_ioctl(struct drm_device
*dev
, void *data
,
1182 struct drm_file
*file
)
1184 struct drm_i915_gem_set_domain
*args
= data
;
1185 struct drm_i915_gem_object
*obj
;
1186 uint32_t read_domains
= args
->read_domains
;
1187 uint32_t write_domain
= args
->write_domain
;
1190 /* Only handle setting domains to types used by the CPU. */
1191 if (write_domain
& I915_GEM_GPU_DOMAINS
)
1194 if (read_domains
& I915_GEM_GPU_DOMAINS
)
1197 /* Having something in the write domain implies it's in the read
1198 * domain, and only that read domain. Enforce that in the request.
1200 if (write_domain
!= 0 && read_domains
!= write_domain
)
1203 ret
= i915_mutex_lock_interruptible(dev
);
1207 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1208 if (&obj
->base
== NULL
) {
1213 /* Try to flush the object off the GPU without holding the lock.
1214 * We will repeat the flush holding the lock in the normal manner
1215 * to catch cases where we are gazumped.
1217 ret
= i915_gem_object_wait_rendering__nonblocking(obj
, !write_domain
);
1221 if (read_domains
& I915_GEM_DOMAIN_GTT
) {
1222 ret
= i915_gem_object_set_to_gtt_domain(obj
, write_domain
!= 0);
1224 /* Silently promote "you're not bound, there was nothing to do"
1225 * to success, since the client was just asking us to
1226 * make sure everything was done.
1231 ret
= i915_gem_object_set_to_cpu_domain(obj
, write_domain
!= 0);
1235 drm_gem_object_unreference(&obj
->base
);
1237 mutex_unlock(&dev
->struct_mutex
);
1242 * Called when user space has done writes to this buffer
1245 i915_gem_sw_finish_ioctl(struct drm_device
*dev
, void *data
,
1246 struct drm_file
*file
)
1248 struct drm_i915_gem_sw_finish
*args
= data
;
1249 struct drm_i915_gem_object
*obj
;
1252 ret
= i915_mutex_lock_interruptible(dev
);
1256 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1257 if (&obj
->base
== NULL
) {
1262 /* Pinned buffers may be scanout, so flush the cache */
1264 i915_gem_object_flush_cpu_write_domain(obj
);
1266 drm_gem_object_unreference(&obj
->base
);
1268 mutex_unlock(&dev
->struct_mutex
);
1273 * Maps the contents of an object, returning the address it is mapped
1276 * While the mapping holds a reference on the contents of the object, it doesn't
1277 * imply a ref on the object itself.
1280 i915_gem_mmap_ioctl(struct drm_device
*dev
, void *data
,
1281 struct drm_file
*file
)
1283 struct drm_i915_gem_mmap
*args
= data
;
1284 struct drm_gem_object
*obj
;
1287 obj
= drm_gem_object_lookup(dev
, file
, args
->handle
);
1291 /* prime objects have no backing filp to GEM mmap
1295 drm_gem_object_unreference_unlocked(obj
);
1299 addr
= vm_mmap(obj
->filp
, 0, args
->size
,
1300 PROT_READ
| PROT_WRITE
, MAP_SHARED
,
1302 drm_gem_object_unreference_unlocked(obj
);
1303 if (IS_ERR((void *)addr
))
1306 args
->addr_ptr
= (uint64_t) addr
;
1312 * i915_gem_fault - fault a page into the GTT
1313 * vma: VMA in question
1316 * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped
1317 * from userspace. The fault handler takes care of binding the object to
1318 * the GTT (if needed), allocating and programming a fence register (again,
1319 * only if needed based on whether the old reg is still valid or the object
1320 * is tiled) and inserting a new PTE into the faulting process.
1322 * Note that the faulting process may involve evicting existing objects
1323 * from the GTT and/or fence registers to make room. So performance may
1324 * suffer if the GTT working set is large or there are few fence registers
1327 int i915_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
1329 struct drm_i915_gem_object
*obj
= to_intel_bo(vma
->vm_private_data
);
1330 struct drm_device
*dev
= obj
->base
.dev
;
1331 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1332 pgoff_t page_offset
;
1335 bool write
= !!(vmf
->flags
& FAULT_FLAG_WRITE
);
1337 /* We don't use vmf->pgoff since that has the fake offset */
1338 page_offset
= ((unsigned long)vmf
->virtual_address
- vma
->vm_start
) >>
1341 ret
= i915_mutex_lock_interruptible(dev
);
1345 trace_i915_gem_object_fault(obj
, page_offset
, true, write
);
1347 /* Now bind it into the GTT if needed */
1348 ret
= i915_gem_object_pin(obj
, 0, true, false);
1352 ret
= i915_gem_object_set_to_gtt_domain(obj
, write
);
1356 ret
= i915_gem_object_get_fence(obj
);
1360 obj
->fault_mappable
= true;
1362 pfn
= ((dev_priv
->mm
.gtt_base_addr
+ obj
->gtt_offset
) >> PAGE_SHIFT
) +
1365 /* Finally, remap it using the new GTT offset */
1366 ret
= vm_insert_pfn(vma
, (unsigned long)vmf
->virtual_address
, pfn
);
1368 i915_gem_object_unpin(obj
);
1370 mutex_unlock(&dev
->struct_mutex
);
1374 /* If this -EIO is due to a gpu hang, give the reset code a
1375 * chance to clean up the mess. Otherwise return the proper
1377 if (!atomic_read(&dev_priv
->mm
.wedged
))
1378 return VM_FAULT_SIGBUS
;
1380 /* Give the error handler a chance to run and move the
1381 * objects off the GPU active list. Next time we service the
1382 * fault, we should be able to transition the page into the
1383 * GTT without touching the GPU (and so avoid further
1384 * EIO/EGAIN). If the GPU is wedged, then there is no issue
1385 * with coherency, just lost writes.
1393 * EBUSY is ok: this just means that another thread
1394 * already did the job.
1396 return VM_FAULT_NOPAGE
;
1398 return VM_FAULT_OOM
;
1400 return VM_FAULT_SIGBUS
;
1402 WARN_ONCE(ret
, "unhandled error in i915_gem_fault: %i\n", ret
);
1403 return VM_FAULT_SIGBUS
;
1408 * i915_gem_release_mmap - remove physical page mappings
1409 * @obj: obj in question
1411 * Preserve the reservation of the mmapping with the DRM core code, but
1412 * relinquish ownership of the pages back to the system.
1414 * It is vital that we remove the page mapping if we have mapped a tiled
1415 * object through the GTT and then lose the fence register due to
1416 * resource pressure. Similarly if the object has been moved out of the
1417 * aperture, than pages mapped into userspace must be revoked. Removing the
1418 * mapping will then trigger a page fault on the next user access, allowing
1419 * fixup by i915_gem_fault().
1422 i915_gem_release_mmap(struct drm_i915_gem_object
*obj
)
1424 if (!obj
->fault_mappable
)
1427 if (obj
->base
.dev
->dev_mapping
)
1428 unmap_mapping_range(obj
->base
.dev
->dev_mapping
,
1429 (loff_t
)obj
->base
.map_list
.hash
.key
<<PAGE_SHIFT
,
1432 obj
->fault_mappable
= false;
1436 i915_gem_get_gtt_size(struct drm_device
*dev
, uint32_t size
, int tiling_mode
)
1440 if (INTEL_INFO(dev
)->gen
>= 4 ||
1441 tiling_mode
== I915_TILING_NONE
)
1444 /* Previous chips need a power-of-two fence region when tiling */
1445 if (INTEL_INFO(dev
)->gen
== 3)
1446 gtt_size
= 1024*1024;
1448 gtt_size
= 512*1024;
1450 while (gtt_size
< size
)
1457 * i915_gem_get_gtt_alignment - return required GTT alignment for an object
1458 * @obj: object to check
1460 * Return the required GTT alignment for an object, taking into account
1461 * potential fence register mapping.
1464 i915_gem_get_gtt_alignment(struct drm_device
*dev
,
1469 * Minimum alignment is 4k (GTT page size), but might be greater
1470 * if a fence register is needed for the object.
1472 if (INTEL_INFO(dev
)->gen
>= 4 ||
1473 tiling_mode
== I915_TILING_NONE
)
1477 * Previous chips need to be aligned to the size of the smallest
1478 * fence register that can contain the object.
1480 return i915_gem_get_gtt_size(dev
, size
, tiling_mode
);
1484 * i915_gem_get_unfenced_gtt_alignment - return required GTT alignment for an
1487 * @size: size of the object
1488 * @tiling_mode: tiling mode of the object
1490 * Return the required GTT alignment for an object, only taking into account
1491 * unfenced tiled surface requirements.
1494 i915_gem_get_unfenced_gtt_alignment(struct drm_device
*dev
,
1499 * Minimum alignment is 4k (GTT page size) for sane hw.
1501 if (INTEL_INFO(dev
)->gen
>= 4 || IS_G33(dev
) ||
1502 tiling_mode
== I915_TILING_NONE
)
1505 /* Previous hardware however needs to be aligned to a power-of-two
1506 * tile height. The simplest method for determining this is to reuse
1507 * the power-of-tile object size.
1509 return i915_gem_get_gtt_size(dev
, size
, tiling_mode
);
1512 static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object
*obj
)
1514 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
1517 if (obj
->base
.map_list
.map
)
1520 ret
= drm_gem_create_mmap_offset(&obj
->base
);
1524 /* Badly fragmented mmap space? The only way we can recover
1525 * space is by destroying unwanted objects. We can't randomly release
1526 * mmap_offsets as userspace expects them to be persistent for the
1527 * lifetime of the objects. The closest we can is to release the
1528 * offsets on purgeable objects by truncating it and marking it purged,
1529 * which prevents userspace from ever using that object again.
1531 i915_gem_purge(dev_priv
, obj
->base
.size
>> PAGE_SHIFT
);
1532 ret
= drm_gem_create_mmap_offset(&obj
->base
);
1536 i915_gem_shrink_all(dev_priv
);
1537 return drm_gem_create_mmap_offset(&obj
->base
);
1540 static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object
*obj
)
1542 if (!obj
->base
.map_list
.map
)
1545 drm_gem_free_mmap_offset(&obj
->base
);
1549 i915_gem_mmap_gtt(struct drm_file
*file
,
1550 struct drm_device
*dev
,
1554 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1555 struct drm_i915_gem_object
*obj
;
1558 ret
= i915_mutex_lock_interruptible(dev
);
1562 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, handle
));
1563 if (&obj
->base
== NULL
) {
1568 if (obj
->base
.size
> dev_priv
->mm
.gtt_mappable_end
) {
1573 if (obj
->madv
!= I915_MADV_WILLNEED
) {
1574 DRM_ERROR("Attempting to mmap a purgeable buffer\n");
1579 ret
= i915_gem_object_create_mmap_offset(obj
);
1583 *offset
= (u64
)obj
->base
.map_list
.hash
.key
<< PAGE_SHIFT
;
1586 drm_gem_object_unreference(&obj
->base
);
1588 mutex_unlock(&dev
->struct_mutex
);
1593 * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing
1595 * @data: GTT mapping ioctl data
1596 * @file: GEM object info
1598 * Simply returns the fake offset to userspace so it can mmap it.
1599 * The mmap call will end up in drm_gem_mmap(), which will set things
1600 * up so we can get faults in the handler above.
1602 * The fault handler will take care of binding the object into the GTT
1603 * (since it may have been evicted to make room for something), allocating
1604 * a fence register, and mapping the appropriate aperture address into
1608 i915_gem_mmap_gtt_ioctl(struct drm_device
*dev
, void *data
,
1609 struct drm_file
*file
)
1611 struct drm_i915_gem_mmap_gtt
*args
= data
;
1613 return i915_gem_mmap_gtt(file
, dev
, args
->handle
, &args
->offset
);
1616 /* Immediately discard the backing storage */
1618 i915_gem_object_truncate(struct drm_i915_gem_object
*obj
)
1620 struct inode
*inode
;
1622 i915_gem_object_free_mmap_offset(obj
);
1624 if (obj
->base
.filp
== NULL
)
1627 /* Our goal here is to return as much of the memory as
1628 * is possible back to the system as we are called from OOM.
1629 * To do this we must instruct the shmfs to drop all of its
1630 * backing pages, *now*.
1632 inode
= obj
->base
.filp
->f_path
.dentry
->d_inode
;
1633 shmem_truncate_range(inode
, 0, (loff_t
)-1);
1635 obj
->madv
= __I915_MADV_PURGED
;
1639 i915_gem_object_is_purgeable(struct drm_i915_gem_object
*obj
)
1641 return obj
->madv
== I915_MADV_DONTNEED
;
1645 i915_gem_object_put_pages_gtt(struct drm_i915_gem_object
*obj
)
1647 int page_count
= obj
->base
.size
/ PAGE_SIZE
;
1648 struct scatterlist
*sg
;
1651 BUG_ON(obj
->madv
== __I915_MADV_PURGED
);
1653 ret
= i915_gem_object_set_to_cpu_domain(obj
, true);
1655 /* In the event of a disaster, abandon all caches and
1656 * hope for the best.
1658 WARN_ON(ret
!= -EIO
);
1659 i915_gem_clflush_object(obj
);
1660 obj
->base
.read_domains
= obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
1663 if (i915_gem_object_needs_bit17_swizzle(obj
))
1664 i915_gem_object_save_bit_17_swizzle(obj
);
1666 if (obj
->madv
== I915_MADV_DONTNEED
)
1669 for_each_sg(obj
->pages
->sgl
, sg
, page_count
, i
) {
1670 struct page
*page
= sg_page(sg
);
1673 set_page_dirty(page
);
1675 if (obj
->madv
== I915_MADV_WILLNEED
)
1676 mark_page_accessed(page
);
1678 page_cache_release(page
);
1682 sg_free_table(obj
->pages
);
1687 i915_gem_object_put_pages(struct drm_i915_gem_object
*obj
)
1689 const struct drm_i915_gem_object_ops
*ops
= obj
->ops
;
1691 if (obj
->pages
== NULL
)
1694 BUG_ON(obj
->gtt_space
);
1696 if (obj
->pages_pin_count
)
1699 ops
->put_pages(obj
);
1702 list_del(&obj
->gtt_list
);
1703 if (i915_gem_object_is_purgeable(obj
))
1704 i915_gem_object_truncate(obj
);
1710 i915_gem_purge(struct drm_i915_private
*dev_priv
, long target
)
1712 struct drm_i915_gem_object
*obj
, *next
;
1715 list_for_each_entry_safe(obj
, next
,
1716 &dev_priv
->mm
.unbound_list
,
1718 if (i915_gem_object_is_purgeable(obj
) &&
1719 i915_gem_object_put_pages(obj
) == 0) {
1720 count
+= obj
->base
.size
>> PAGE_SHIFT
;
1721 if (count
>= target
)
1726 list_for_each_entry_safe(obj
, next
,
1727 &dev_priv
->mm
.inactive_list
,
1729 if (i915_gem_object_is_purgeable(obj
) &&
1730 i915_gem_object_unbind(obj
) == 0 &&
1731 i915_gem_object_put_pages(obj
) == 0) {
1732 count
+= obj
->base
.size
>> PAGE_SHIFT
;
1733 if (count
>= target
)
1742 i915_gem_shrink_all(struct drm_i915_private
*dev_priv
)
1744 struct drm_i915_gem_object
*obj
, *next
;
1746 i915_gem_evict_everything(dev_priv
->dev
);
1748 list_for_each_entry_safe(obj
, next
, &dev_priv
->mm
.unbound_list
, gtt_list
)
1749 i915_gem_object_put_pages(obj
);
1753 i915_gem_object_get_pages_gtt(struct drm_i915_gem_object
*obj
)
1755 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
1757 struct address_space
*mapping
;
1758 struct sg_table
*st
;
1759 struct scatterlist
*sg
;
1763 /* Assert that the object is not currently in any GPU domain. As it
1764 * wasn't in the GTT, there shouldn't be any way it could have been in
1767 BUG_ON(obj
->base
.read_domains
& I915_GEM_GPU_DOMAINS
);
1768 BUG_ON(obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
);
1770 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
1774 page_count
= obj
->base
.size
/ PAGE_SIZE
;
1775 if (sg_alloc_table(st
, page_count
, GFP_KERNEL
)) {
1781 /* Get the list of pages out of our struct file. They'll be pinned
1782 * at this point until we release them.
1784 * Fail silently without starting the shrinker
1786 mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
1787 gfp
= mapping_gfp_mask(mapping
);
1788 gfp
|= __GFP_NORETRY
| __GFP_NOWARN
;
1789 gfp
&= ~(__GFP_IO
| __GFP_WAIT
);
1790 for_each_sg(st
->sgl
, sg
, page_count
, i
) {
1791 page
= shmem_read_mapping_page_gfp(mapping
, i
, gfp
);
1793 i915_gem_purge(dev_priv
, page_count
);
1794 page
= shmem_read_mapping_page_gfp(mapping
, i
, gfp
);
1797 /* We've tried hard to allocate the memory by reaping
1798 * our own buffer, now let the real VM do its job and
1799 * go down in flames if truly OOM.
1801 gfp
&= ~(__GFP_NORETRY
| __GFP_NOWARN
);
1802 gfp
|= __GFP_IO
| __GFP_WAIT
;
1804 i915_gem_shrink_all(dev_priv
);
1805 page
= shmem_read_mapping_page_gfp(mapping
, i
, gfp
);
1809 gfp
|= __GFP_NORETRY
| __GFP_NOWARN
;
1810 gfp
&= ~(__GFP_IO
| __GFP_WAIT
);
1813 sg_set_page(sg
, page
, PAGE_SIZE
, 0);
1818 if (i915_gem_object_needs_bit17_swizzle(obj
))
1819 i915_gem_object_do_bit_17_swizzle(obj
);
1824 for_each_sg(st
->sgl
, sg
, i
, page_count
)
1825 page_cache_release(sg_page(sg
));
1828 return PTR_ERR(page
);
1831 /* Ensure that the associated pages are gathered from the backing storage
1832 * and pinned into our object. i915_gem_object_get_pages() may be called
1833 * multiple times before they are released by a single call to
1834 * i915_gem_object_put_pages() - once the pages are no longer referenced
1835 * either as a result of memory pressure (reaping pages under the shrinker)
1836 * or as the object is itself released.
1839 i915_gem_object_get_pages(struct drm_i915_gem_object
*obj
)
1841 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
1842 const struct drm_i915_gem_object_ops
*ops
= obj
->ops
;
1848 BUG_ON(obj
->pages_pin_count
);
1850 ret
= ops
->get_pages(obj
);
1854 list_add_tail(&obj
->gtt_list
, &dev_priv
->mm
.unbound_list
);
1859 i915_gem_object_move_to_active(struct drm_i915_gem_object
*obj
,
1860 struct intel_ring_buffer
*ring
,
1863 struct drm_device
*dev
= obj
->base
.dev
;
1864 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1866 BUG_ON(ring
== NULL
);
1869 /* Add a reference if we're newly entering the active list. */
1871 drm_gem_object_reference(&obj
->base
);
1875 /* Move from whatever list we were on to the tail of execution. */
1876 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.active_list
);
1877 list_move_tail(&obj
->ring_list
, &ring
->active_list
);
1879 obj
->last_read_seqno
= seqno
;
1881 if (obj
->fenced_gpu_access
) {
1882 obj
->last_fenced_seqno
= seqno
;
1884 /* Bump MRU to take account of the delayed flush */
1885 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
1886 struct drm_i915_fence_reg
*reg
;
1888 reg
= &dev_priv
->fence_regs
[obj
->fence_reg
];
1889 list_move_tail(®
->lru_list
,
1890 &dev_priv
->mm
.fence_list
);
1896 i915_gem_object_move_to_inactive(struct drm_i915_gem_object
*obj
)
1898 struct drm_device
*dev
= obj
->base
.dev
;
1899 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1901 BUG_ON(obj
->base
.write_domain
& ~I915_GEM_GPU_DOMAINS
);
1902 BUG_ON(!obj
->active
);
1904 if (obj
->pin_count
) /* are we a framebuffer? */
1905 intel_mark_fb_idle(obj
);
1907 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
1909 list_del_init(&obj
->ring_list
);
1912 obj
->last_read_seqno
= 0;
1913 obj
->last_write_seqno
= 0;
1914 obj
->base
.write_domain
= 0;
1916 obj
->last_fenced_seqno
= 0;
1917 obj
->fenced_gpu_access
= false;
1920 drm_gem_object_unreference(&obj
->base
);
1922 WARN_ON(i915_verify_lists(dev
));
1926 i915_gem_get_seqno(struct drm_device
*dev
)
1928 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1929 u32 seqno
= dev_priv
->next_seqno
;
1931 /* reserve 0 for non-seqno */
1932 if (++dev_priv
->next_seqno
== 0)
1933 dev_priv
->next_seqno
= 1;
1939 i915_gem_next_request_seqno(struct intel_ring_buffer
*ring
)
1941 if (ring
->outstanding_lazy_request
== 0)
1942 ring
->outstanding_lazy_request
= i915_gem_get_seqno(ring
->dev
);
1944 return ring
->outstanding_lazy_request
;
1948 i915_add_request(struct intel_ring_buffer
*ring
,
1949 struct drm_file
*file
,
1952 drm_i915_private_t
*dev_priv
= ring
->dev
->dev_private
;
1953 struct drm_i915_gem_request
*request
;
1954 u32 request_ring_position
;
1960 * Emit any outstanding flushes - execbuf can fail to emit the flush
1961 * after having emitted the batchbuffer command. Hence we need to fix
1962 * things up similar to emitting the lazy request. The difference here
1963 * is that the flush _must_ happen before the next request, no matter
1966 ret
= intel_ring_flush_all_caches(ring
);
1970 request
= kmalloc(sizeof(*request
), GFP_KERNEL
);
1971 if (request
== NULL
)
1974 seqno
= i915_gem_next_request_seqno(ring
);
1976 /* Record the position of the start of the request so that
1977 * should we detect the updated seqno part-way through the
1978 * GPU processing the request, we never over-estimate the
1979 * position of the head.
1981 request_ring_position
= intel_ring_get_tail(ring
);
1983 ret
= ring
->add_request(ring
, &seqno
);
1989 trace_i915_gem_request_add(ring
, seqno
);
1991 request
->seqno
= seqno
;
1992 request
->ring
= ring
;
1993 request
->tail
= request_ring_position
;
1994 request
->emitted_jiffies
= jiffies
;
1995 was_empty
= list_empty(&ring
->request_list
);
1996 list_add_tail(&request
->list
, &ring
->request_list
);
1997 request
->file_priv
= NULL
;
2000 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
2002 spin_lock(&file_priv
->mm
.lock
);
2003 request
->file_priv
= file_priv
;
2004 list_add_tail(&request
->client_list
,
2005 &file_priv
->mm
.request_list
);
2006 spin_unlock(&file_priv
->mm
.lock
);
2009 ring
->outstanding_lazy_request
= 0;
2011 if (!dev_priv
->mm
.suspended
) {
2012 if (i915_enable_hangcheck
) {
2013 mod_timer(&dev_priv
->hangcheck_timer
,
2014 round_jiffies_up(jiffies
+ DRM_I915_HANGCHECK_JIFFIES
));
2017 queue_delayed_work(dev_priv
->wq
,
2018 &dev_priv
->mm
.retire_work
,
2019 round_jiffies_up_relative(HZ
));
2020 intel_mark_busy(dev_priv
->dev
);
2030 i915_gem_request_remove_from_client(struct drm_i915_gem_request
*request
)
2032 struct drm_i915_file_private
*file_priv
= request
->file_priv
;
2037 spin_lock(&file_priv
->mm
.lock
);
2038 if (request
->file_priv
) {
2039 list_del(&request
->client_list
);
2040 request
->file_priv
= NULL
;
2042 spin_unlock(&file_priv
->mm
.lock
);
2045 static void i915_gem_reset_ring_lists(struct drm_i915_private
*dev_priv
,
2046 struct intel_ring_buffer
*ring
)
2048 while (!list_empty(&ring
->request_list
)) {
2049 struct drm_i915_gem_request
*request
;
2051 request
= list_first_entry(&ring
->request_list
,
2052 struct drm_i915_gem_request
,
2055 list_del(&request
->list
);
2056 i915_gem_request_remove_from_client(request
);
2060 while (!list_empty(&ring
->active_list
)) {
2061 struct drm_i915_gem_object
*obj
;
2063 obj
= list_first_entry(&ring
->active_list
,
2064 struct drm_i915_gem_object
,
2067 i915_gem_object_move_to_inactive(obj
);
2071 static void i915_gem_reset_fences(struct drm_device
*dev
)
2073 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2076 for (i
= 0; i
< dev_priv
->num_fence_regs
; i
++) {
2077 struct drm_i915_fence_reg
*reg
= &dev_priv
->fence_regs
[i
];
2079 i915_gem_write_fence(dev
, i
, NULL
);
2082 i915_gem_object_fence_lost(reg
->obj
);
2086 INIT_LIST_HEAD(®
->lru_list
);
2089 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
2092 void i915_gem_reset(struct drm_device
*dev
)
2094 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2095 struct drm_i915_gem_object
*obj
;
2096 struct intel_ring_buffer
*ring
;
2099 for_each_ring(ring
, dev_priv
, i
)
2100 i915_gem_reset_ring_lists(dev_priv
, ring
);
2102 /* Move everything out of the GPU domains to ensure we do any
2103 * necessary invalidation upon reuse.
2105 list_for_each_entry(obj
,
2106 &dev_priv
->mm
.inactive_list
,
2109 obj
->base
.read_domains
&= ~I915_GEM_GPU_DOMAINS
;
2112 /* The fence registers are invalidated so clear them out */
2113 i915_gem_reset_fences(dev
);
2117 * This function clears the request list as sequence numbers are passed.
2120 i915_gem_retire_requests_ring(struct intel_ring_buffer
*ring
)
2125 if (list_empty(&ring
->request_list
))
2128 WARN_ON(i915_verify_lists(ring
->dev
));
2130 seqno
= ring
->get_seqno(ring
, true);
2132 for (i
= 0; i
< ARRAY_SIZE(ring
->sync_seqno
); i
++)
2133 if (seqno
>= ring
->sync_seqno
[i
])
2134 ring
->sync_seqno
[i
] = 0;
2136 while (!list_empty(&ring
->request_list
)) {
2137 struct drm_i915_gem_request
*request
;
2139 request
= list_first_entry(&ring
->request_list
,
2140 struct drm_i915_gem_request
,
2143 if (!i915_seqno_passed(seqno
, request
->seqno
))
2146 trace_i915_gem_request_retire(ring
, request
->seqno
);
2147 /* We know the GPU must have read the request to have
2148 * sent us the seqno + interrupt, so use the position
2149 * of tail of the request to update the last known position
2152 ring
->last_retired_head
= request
->tail
;
2154 list_del(&request
->list
);
2155 i915_gem_request_remove_from_client(request
);
2159 /* Move any buffers on the active list that are no longer referenced
2160 * by the ringbuffer to the flushing/inactive lists as appropriate.
2162 while (!list_empty(&ring
->active_list
)) {
2163 struct drm_i915_gem_object
*obj
;
2165 obj
= list_first_entry(&ring
->active_list
,
2166 struct drm_i915_gem_object
,
2169 if (!i915_seqno_passed(seqno
, obj
->last_read_seqno
))
2172 i915_gem_object_move_to_inactive(obj
);
2175 if (unlikely(ring
->trace_irq_seqno
&&
2176 i915_seqno_passed(seqno
, ring
->trace_irq_seqno
))) {
2177 ring
->irq_put(ring
);
2178 ring
->trace_irq_seqno
= 0;
2181 WARN_ON(i915_verify_lists(ring
->dev
));
2185 i915_gem_retire_requests(struct drm_device
*dev
)
2187 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2188 struct intel_ring_buffer
*ring
;
2191 for_each_ring(ring
, dev_priv
, i
)
2192 i915_gem_retire_requests_ring(ring
);
2196 i915_gem_retire_work_handler(struct work_struct
*work
)
2198 drm_i915_private_t
*dev_priv
;
2199 struct drm_device
*dev
;
2200 struct intel_ring_buffer
*ring
;
2204 dev_priv
= container_of(work
, drm_i915_private_t
,
2205 mm
.retire_work
.work
);
2206 dev
= dev_priv
->dev
;
2208 /* Come back later if the device is busy... */
2209 if (!mutex_trylock(&dev
->struct_mutex
)) {
2210 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
,
2211 round_jiffies_up_relative(HZ
));
2215 i915_gem_retire_requests(dev
);
2217 /* Send a periodic flush down the ring so we don't hold onto GEM
2218 * objects indefinitely.
2221 for_each_ring(ring
, dev_priv
, i
) {
2222 if (ring
->gpu_caches_dirty
)
2223 i915_add_request(ring
, NULL
, NULL
);
2225 idle
&= list_empty(&ring
->request_list
);
2228 if (!dev_priv
->mm
.suspended
&& !idle
)
2229 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
,
2230 round_jiffies_up_relative(HZ
));
2232 intel_mark_idle(dev
);
2234 mutex_unlock(&dev
->struct_mutex
);
2238 * Ensures that an object will eventually get non-busy by flushing any required
2239 * write domains, emitting any outstanding lazy request and retiring and
2240 * completed requests.
2243 i915_gem_object_flush_active(struct drm_i915_gem_object
*obj
)
2248 ret
= i915_gem_check_olr(obj
->ring
, obj
->last_read_seqno
);
2252 i915_gem_retire_requests_ring(obj
->ring
);
2259 * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT
2260 * @DRM_IOCTL_ARGS: standard ioctl arguments
2262 * Returns 0 if successful, else an error is returned with the remaining time in
2263 * the timeout parameter.
2264 * -ETIME: object is still busy after timeout
2265 * -ERESTARTSYS: signal interrupted the wait
2266 * -ENONENT: object doesn't exist
2267 * Also possible, but rare:
2268 * -EAGAIN: GPU wedged
2270 * -ENODEV: Internal IRQ fail
2271 * -E?: The add request failed
2273 * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any
2274 * non-zero timeout parameter the wait ioctl will wait for the given number of
2275 * nanoseconds on an object becoming unbusy. Since the wait itself does so
2276 * without holding struct_mutex the object may become re-busied before this
2277 * function completes. A similar but shorter * race condition exists in the busy
2281 i915_gem_wait_ioctl(struct drm_device
*dev
, void *data
, struct drm_file
*file
)
2283 struct drm_i915_gem_wait
*args
= data
;
2284 struct drm_i915_gem_object
*obj
;
2285 struct intel_ring_buffer
*ring
= NULL
;
2286 struct timespec timeout_stack
, *timeout
= NULL
;
2290 if (args
->timeout_ns
>= 0) {
2291 timeout_stack
= ns_to_timespec(args
->timeout_ns
);
2292 timeout
= &timeout_stack
;
2295 ret
= i915_mutex_lock_interruptible(dev
);
2299 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->bo_handle
));
2300 if (&obj
->base
== NULL
) {
2301 mutex_unlock(&dev
->struct_mutex
);
2305 /* Need to make sure the object gets inactive eventually. */
2306 ret
= i915_gem_object_flush_active(obj
);
2311 seqno
= obj
->last_read_seqno
;
2318 /* Do this after OLR check to make sure we make forward progress polling
2319 * on this IOCTL with a 0 timeout (like busy ioctl)
2321 if (!args
->timeout_ns
) {
2326 drm_gem_object_unreference(&obj
->base
);
2327 mutex_unlock(&dev
->struct_mutex
);
2329 ret
= __wait_seqno(ring
, seqno
, true, timeout
);
2331 WARN_ON(!timespec_valid(timeout
));
2332 args
->timeout_ns
= timespec_to_ns(timeout
);
2337 drm_gem_object_unreference(&obj
->base
);
2338 mutex_unlock(&dev
->struct_mutex
);
2343 * i915_gem_object_sync - sync an object to a ring.
2345 * @obj: object which may be in use on another ring.
2346 * @to: ring we wish to use the object on. May be NULL.
2348 * This code is meant to abstract object synchronization with the GPU.
2349 * Calling with NULL implies synchronizing the object with the CPU
2350 * rather than a particular GPU ring.
2352 * Returns 0 if successful, else propagates up the lower layer error.
2355 i915_gem_object_sync(struct drm_i915_gem_object
*obj
,
2356 struct intel_ring_buffer
*to
)
2358 struct intel_ring_buffer
*from
= obj
->ring
;
2362 if (from
== NULL
|| to
== from
)
2365 if (to
== NULL
|| !i915_semaphore_is_enabled(obj
->base
.dev
))
2366 return i915_gem_object_wait_rendering(obj
, false);
2368 idx
= intel_ring_sync_index(from
, to
);
2370 seqno
= obj
->last_read_seqno
;
2371 if (seqno
<= from
->sync_seqno
[idx
])
2374 ret
= i915_gem_check_olr(obj
->ring
, seqno
);
2378 ret
= to
->sync_to(to
, from
, seqno
);
2380 from
->sync_seqno
[idx
] = seqno
;
2385 static void i915_gem_object_finish_gtt(struct drm_i915_gem_object
*obj
)
2387 u32 old_write_domain
, old_read_domains
;
2389 /* Act a barrier for all accesses through the GTT */
2392 /* Force a pagefault for domain tracking on next user access */
2393 i915_gem_release_mmap(obj
);
2395 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
) == 0)
2398 old_read_domains
= obj
->base
.read_domains
;
2399 old_write_domain
= obj
->base
.write_domain
;
2401 obj
->base
.read_domains
&= ~I915_GEM_DOMAIN_GTT
;
2402 obj
->base
.write_domain
&= ~I915_GEM_DOMAIN_GTT
;
2404 trace_i915_gem_object_change_domain(obj
,
2410 * Unbinds an object from the GTT aperture.
2413 i915_gem_object_unbind(struct drm_i915_gem_object
*obj
)
2415 drm_i915_private_t
*dev_priv
= obj
->base
.dev
->dev_private
;
2418 if (obj
->gtt_space
== NULL
)
2424 BUG_ON(obj
->pages
== NULL
);
2426 ret
= i915_gem_object_finish_gpu(obj
);
2429 /* Continue on if we fail due to EIO, the GPU is hung so we
2430 * should be safe and we need to cleanup or else we might
2431 * cause memory corruption through use-after-free.
2434 i915_gem_object_finish_gtt(obj
);
2436 /* release the fence reg _after_ flushing */
2437 ret
= i915_gem_object_put_fence(obj
);
2441 trace_i915_gem_object_unbind(obj
);
2443 if (obj
->has_global_gtt_mapping
)
2444 i915_gem_gtt_unbind_object(obj
);
2445 if (obj
->has_aliasing_ppgtt_mapping
) {
2446 i915_ppgtt_unbind_object(dev_priv
->mm
.aliasing_ppgtt
, obj
);
2447 obj
->has_aliasing_ppgtt_mapping
= 0;
2449 i915_gem_gtt_finish_object(obj
);
2451 list_del(&obj
->mm_list
);
2452 list_move_tail(&obj
->gtt_list
, &dev_priv
->mm
.unbound_list
);
2453 /* Avoid an unnecessary call to unbind on rebind. */
2454 obj
->map_and_fenceable
= true;
2456 drm_mm_put_block(obj
->gtt_space
);
2457 obj
->gtt_space
= NULL
;
2458 obj
->gtt_offset
= 0;
2463 static int i915_ring_idle(struct intel_ring_buffer
*ring
)
2465 if (list_empty(&ring
->active_list
))
2468 return i915_wait_seqno(ring
, i915_gem_next_request_seqno(ring
));
2471 int i915_gpu_idle(struct drm_device
*dev
)
2473 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2474 struct intel_ring_buffer
*ring
;
2477 /* Flush everything onto the inactive list. */
2478 for_each_ring(ring
, dev_priv
, i
) {
2479 ret
= i915_switch_context(ring
, NULL
, DEFAULT_CONTEXT_ID
);
2483 ret
= i915_ring_idle(ring
);
2491 static void sandybridge_write_fence_reg(struct drm_device
*dev
, int reg
,
2492 struct drm_i915_gem_object
*obj
)
2494 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2498 u32 size
= obj
->gtt_space
->size
;
2500 val
= (uint64_t)((obj
->gtt_offset
+ size
- 4096) &
2502 val
|= obj
->gtt_offset
& 0xfffff000;
2503 val
|= (uint64_t)((obj
->stride
/ 128) - 1) <<
2504 SANDYBRIDGE_FENCE_PITCH_SHIFT
;
2506 if (obj
->tiling_mode
== I915_TILING_Y
)
2507 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2508 val
|= I965_FENCE_REG_VALID
;
2512 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0
+ reg
* 8, val
);
2513 POSTING_READ(FENCE_REG_SANDYBRIDGE_0
+ reg
* 8);
2516 static void i965_write_fence_reg(struct drm_device
*dev
, int reg
,
2517 struct drm_i915_gem_object
*obj
)
2519 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2523 u32 size
= obj
->gtt_space
->size
;
2525 val
= (uint64_t)((obj
->gtt_offset
+ size
- 4096) &
2527 val
|= obj
->gtt_offset
& 0xfffff000;
2528 val
|= ((obj
->stride
/ 128) - 1) << I965_FENCE_PITCH_SHIFT
;
2529 if (obj
->tiling_mode
== I915_TILING_Y
)
2530 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2531 val
|= I965_FENCE_REG_VALID
;
2535 I915_WRITE64(FENCE_REG_965_0
+ reg
* 8, val
);
2536 POSTING_READ(FENCE_REG_965_0
+ reg
* 8);
2539 static void i915_write_fence_reg(struct drm_device
*dev
, int reg
,
2540 struct drm_i915_gem_object
*obj
)
2542 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2546 u32 size
= obj
->gtt_space
->size
;
2550 WARN((obj
->gtt_offset
& ~I915_FENCE_START_MASK
) ||
2551 (size
& -size
) != size
||
2552 (obj
->gtt_offset
& (size
- 1)),
2553 "object 0x%08x [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
2554 obj
->gtt_offset
, obj
->map_and_fenceable
, size
);
2556 if (obj
->tiling_mode
== I915_TILING_Y
&& HAS_128_BYTE_Y_TILING(dev
))
2561 /* Note: pitch better be a power of two tile widths */
2562 pitch_val
= obj
->stride
/ tile_width
;
2563 pitch_val
= ffs(pitch_val
) - 1;
2565 val
= obj
->gtt_offset
;
2566 if (obj
->tiling_mode
== I915_TILING_Y
)
2567 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2568 val
|= I915_FENCE_SIZE_BITS(size
);
2569 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2570 val
|= I830_FENCE_REG_VALID
;
2575 reg
= FENCE_REG_830_0
+ reg
* 4;
2577 reg
= FENCE_REG_945_8
+ (reg
- 8) * 4;
2579 I915_WRITE(reg
, val
);
2583 static void i830_write_fence_reg(struct drm_device
*dev
, int reg
,
2584 struct drm_i915_gem_object
*obj
)
2586 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2590 u32 size
= obj
->gtt_space
->size
;
2593 WARN((obj
->gtt_offset
& ~I830_FENCE_START_MASK
) ||
2594 (size
& -size
) != size
||
2595 (obj
->gtt_offset
& (size
- 1)),
2596 "object 0x%08x not 512K or pot-size 0x%08x aligned\n",
2597 obj
->gtt_offset
, size
);
2599 pitch_val
= obj
->stride
/ 128;
2600 pitch_val
= ffs(pitch_val
) - 1;
2602 val
= obj
->gtt_offset
;
2603 if (obj
->tiling_mode
== I915_TILING_Y
)
2604 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2605 val
|= I830_FENCE_SIZE_BITS(size
);
2606 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2607 val
|= I830_FENCE_REG_VALID
;
2611 I915_WRITE(FENCE_REG_830_0
+ reg
* 4, val
);
2612 POSTING_READ(FENCE_REG_830_0
+ reg
* 4);
2615 static void i915_gem_write_fence(struct drm_device
*dev
, int reg
,
2616 struct drm_i915_gem_object
*obj
)
2618 switch (INTEL_INFO(dev
)->gen
) {
2620 case 6: sandybridge_write_fence_reg(dev
, reg
, obj
); break;
2622 case 4: i965_write_fence_reg(dev
, reg
, obj
); break;
2623 case 3: i915_write_fence_reg(dev
, reg
, obj
); break;
2624 case 2: i830_write_fence_reg(dev
, reg
, obj
); break;
2629 static inline int fence_number(struct drm_i915_private
*dev_priv
,
2630 struct drm_i915_fence_reg
*fence
)
2632 return fence
- dev_priv
->fence_regs
;
2635 static void i915_gem_object_update_fence(struct drm_i915_gem_object
*obj
,
2636 struct drm_i915_fence_reg
*fence
,
2639 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2640 int reg
= fence_number(dev_priv
, fence
);
2642 i915_gem_write_fence(obj
->base
.dev
, reg
, enable
? obj
: NULL
);
2645 obj
->fence_reg
= reg
;
2647 list_move_tail(&fence
->lru_list
, &dev_priv
->mm
.fence_list
);
2649 obj
->fence_reg
= I915_FENCE_REG_NONE
;
2651 list_del_init(&fence
->lru_list
);
2656 i915_gem_object_flush_fence(struct drm_i915_gem_object
*obj
)
2658 if (obj
->last_fenced_seqno
) {
2659 int ret
= i915_wait_seqno(obj
->ring
, obj
->last_fenced_seqno
);
2663 obj
->last_fenced_seqno
= 0;
2666 /* Ensure that all CPU reads are completed before installing a fence
2667 * and all writes before removing the fence.
2669 if (obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
)
2672 obj
->fenced_gpu_access
= false;
2677 i915_gem_object_put_fence(struct drm_i915_gem_object
*obj
)
2679 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2682 ret
= i915_gem_object_flush_fence(obj
);
2686 if (obj
->fence_reg
== I915_FENCE_REG_NONE
)
2689 i915_gem_object_update_fence(obj
,
2690 &dev_priv
->fence_regs
[obj
->fence_reg
],
2692 i915_gem_object_fence_lost(obj
);
2697 static struct drm_i915_fence_reg
*
2698 i915_find_fence_reg(struct drm_device
*dev
)
2700 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2701 struct drm_i915_fence_reg
*reg
, *avail
;
2704 /* First try to find a free reg */
2706 for (i
= dev_priv
->fence_reg_start
; i
< dev_priv
->num_fence_regs
; i
++) {
2707 reg
= &dev_priv
->fence_regs
[i
];
2711 if (!reg
->pin_count
)
2718 /* None available, try to steal one or wait for a user to finish */
2719 list_for_each_entry(reg
, &dev_priv
->mm
.fence_list
, lru_list
) {
2730 * i915_gem_object_get_fence - set up fencing for an object
2731 * @obj: object to map through a fence reg
2733 * When mapping objects through the GTT, userspace wants to be able to write
2734 * to them without having to worry about swizzling if the object is tiled.
2735 * This function walks the fence regs looking for a free one for @obj,
2736 * stealing one if it can't find any.
2738 * It then sets up the reg based on the object's properties: address, pitch
2739 * and tiling format.
2741 * For an untiled surface, this removes any existing fence.
2744 i915_gem_object_get_fence(struct drm_i915_gem_object
*obj
)
2746 struct drm_device
*dev
= obj
->base
.dev
;
2747 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2748 bool enable
= obj
->tiling_mode
!= I915_TILING_NONE
;
2749 struct drm_i915_fence_reg
*reg
;
2752 /* Have we updated the tiling parameters upon the object and so
2753 * will need to serialise the write to the associated fence register?
2755 if (obj
->fence_dirty
) {
2756 ret
= i915_gem_object_flush_fence(obj
);
2761 /* Just update our place in the LRU if our fence is getting reused. */
2762 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
2763 reg
= &dev_priv
->fence_regs
[obj
->fence_reg
];
2764 if (!obj
->fence_dirty
) {
2765 list_move_tail(®
->lru_list
,
2766 &dev_priv
->mm
.fence_list
);
2769 } else if (enable
) {
2770 reg
= i915_find_fence_reg(dev
);
2775 struct drm_i915_gem_object
*old
= reg
->obj
;
2777 ret
= i915_gem_object_flush_fence(old
);
2781 i915_gem_object_fence_lost(old
);
2786 i915_gem_object_update_fence(obj
, reg
, enable
);
2787 obj
->fence_dirty
= false;
2792 static bool i915_gem_valid_gtt_space(struct drm_device
*dev
,
2793 struct drm_mm_node
*gtt_space
,
2794 unsigned long cache_level
)
2796 struct drm_mm_node
*other
;
2798 /* On non-LLC machines we have to be careful when putting differing
2799 * types of snoopable memory together to avoid the prefetcher
2800 * crossing memory domains and dieing.
2805 if (gtt_space
== NULL
)
2808 if (list_empty(>t_space
->node_list
))
2811 other
= list_entry(gtt_space
->node_list
.prev
, struct drm_mm_node
, node_list
);
2812 if (other
->allocated
&& !other
->hole_follows
&& other
->color
!= cache_level
)
2815 other
= list_entry(gtt_space
->node_list
.next
, struct drm_mm_node
, node_list
);
2816 if (other
->allocated
&& !gtt_space
->hole_follows
&& other
->color
!= cache_level
)
2822 static void i915_gem_verify_gtt(struct drm_device
*dev
)
2825 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2826 struct drm_i915_gem_object
*obj
;
2829 list_for_each_entry(obj
, &dev_priv
->mm
.gtt_list
, gtt_list
) {
2830 if (obj
->gtt_space
== NULL
) {
2831 printk(KERN_ERR
"object found on GTT list with no space reserved\n");
2836 if (obj
->cache_level
!= obj
->gtt_space
->color
) {
2837 printk(KERN_ERR
"object reserved space [%08lx, %08lx] with wrong color, cache_level=%x, color=%lx\n",
2838 obj
->gtt_space
->start
,
2839 obj
->gtt_space
->start
+ obj
->gtt_space
->size
,
2841 obj
->gtt_space
->color
);
2846 if (!i915_gem_valid_gtt_space(dev
,
2848 obj
->cache_level
)) {
2849 printk(KERN_ERR
"invalid GTT space found at [%08lx, %08lx] - color=%x\n",
2850 obj
->gtt_space
->start
,
2851 obj
->gtt_space
->start
+ obj
->gtt_space
->size
,
2863 * Finds free space in the GTT aperture and binds the object there.
2866 i915_gem_object_bind_to_gtt(struct drm_i915_gem_object
*obj
,
2868 bool map_and_fenceable
,
2871 struct drm_device
*dev
= obj
->base
.dev
;
2872 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2873 struct drm_mm_node
*free_space
;
2874 u32 size
, fence_size
, fence_alignment
, unfenced_alignment
;
2875 bool mappable
, fenceable
;
2878 if (obj
->madv
!= I915_MADV_WILLNEED
) {
2879 DRM_ERROR("Attempting to bind a purgeable object\n");
2883 fence_size
= i915_gem_get_gtt_size(dev
,
2886 fence_alignment
= i915_gem_get_gtt_alignment(dev
,
2889 unfenced_alignment
=
2890 i915_gem_get_unfenced_gtt_alignment(dev
,
2895 alignment
= map_and_fenceable
? fence_alignment
:
2897 if (map_and_fenceable
&& alignment
& (fence_alignment
- 1)) {
2898 DRM_ERROR("Invalid object alignment requested %u\n", alignment
);
2902 size
= map_and_fenceable
? fence_size
: obj
->base
.size
;
2904 /* If the object is bigger than the entire aperture, reject it early
2905 * before evicting everything in a vain attempt to find space.
2907 if (obj
->base
.size
>
2908 (map_and_fenceable
? dev_priv
->mm
.gtt_mappable_end
: dev_priv
->mm
.gtt_total
)) {
2909 DRM_ERROR("Attempting to bind an object larger than the aperture\n");
2913 ret
= i915_gem_object_get_pages(obj
);
2917 i915_gem_object_pin_pages(obj
);
2920 if (map_and_fenceable
)
2921 free_space
= drm_mm_search_free_in_range_color(&dev_priv
->mm
.gtt_space
,
2922 size
, alignment
, obj
->cache_level
,
2923 0, dev_priv
->mm
.gtt_mappable_end
,
2926 free_space
= drm_mm_search_free_color(&dev_priv
->mm
.gtt_space
,
2927 size
, alignment
, obj
->cache_level
,
2930 if (free_space
!= NULL
) {
2931 if (map_and_fenceable
)
2933 drm_mm_get_block_range_generic(free_space
,
2934 size
, alignment
, obj
->cache_level
,
2935 0, dev_priv
->mm
.gtt_mappable_end
,
2939 drm_mm_get_block_generic(free_space
,
2940 size
, alignment
, obj
->cache_level
,
2943 if (free_space
== NULL
) {
2944 ret
= i915_gem_evict_something(dev
, size
, alignment
,
2949 i915_gem_object_unpin_pages(obj
);
2955 if (WARN_ON(!i915_gem_valid_gtt_space(dev
,
2957 obj
->cache_level
))) {
2958 i915_gem_object_unpin_pages(obj
);
2959 drm_mm_put_block(free_space
);
2963 ret
= i915_gem_gtt_prepare_object(obj
);
2965 i915_gem_object_unpin_pages(obj
);
2966 drm_mm_put_block(free_space
);
2970 list_move_tail(&obj
->gtt_list
, &dev_priv
->mm
.bound_list
);
2971 list_add_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
2973 obj
->gtt_space
= free_space
;
2974 obj
->gtt_offset
= free_space
->start
;
2977 free_space
->size
== fence_size
&&
2978 (free_space
->start
& (fence_alignment
- 1)) == 0;
2981 obj
->gtt_offset
+ obj
->base
.size
<= dev_priv
->mm
.gtt_mappable_end
;
2983 obj
->map_and_fenceable
= mappable
&& fenceable
;
2985 i915_gem_object_unpin_pages(obj
);
2986 trace_i915_gem_object_bind(obj
, map_and_fenceable
);
2987 i915_gem_verify_gtt(dev
);
2992 i915_gem_clflush_object(struct drm_i915_gem_object
*obj
)
2994 /* If we don't have a page list set up, then we're not pinned
2995 * to GPU, and we can ignore the cache flush because it'll happen
2996 * again at bind time.
2998 if (obj
->pages
== NULL
)
3001 /* If the GPU is snooping the contents of the CPU cache,
3002 * we do not need to manually clear the CPU cache lines. However,
3003 * the caches are only snooped when the render cache is
3004 * flushed/invalidated. As we always have to emit invalidations
3005 * and flushes when moving into and out of the RENDER domain, correct
3006 * snooping behaviour occurs naturally as the result of our domain
3009 if (obj
->cache_level
!= I915_CACHE_NONE
)
3012 trace_i915_gem_object_clflush(obj
);
3014 drm_clflush_sg(obj
->pages
);
3017 /** Flushes the GTT write domain for the object if it's dirty. */
3019 i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
)
3021 uint32_t old_write_domain
;
3023 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_GTT
)
3026 /* No actual flushing is required for the GTT write domain. Writes
3027 * to it immediately go to main memory as far as we know, so there's
3028 * no chipset flush. It also doesn't land in render cache.
3030 * However, we do have to enforce the order so that all writes through
3031 * the GTT land before any writes to the device, such as updates to
3036 old_write_domain
= obj
->base
.write_domain
;
3037 obj
->base
.write_domain
= 0;
3039 trace_i915_gem_object_change_domain(obj
,
3040 obj
->base
.read_domains
,
3044 /** Flushes the CPU write domain for the object if it's dirty. */
3046 i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
)
3048 uint32_t old_write_domain
;
3050 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
)
3053 i915_gem_clflush_object(obj
);
3054 i915_gem_chipset_flush(obj
->base
.dev
);
3055 old_write_domain
= obj
->base
.write_domain
;
3056 obj
->base
.write_domain
= 0;
3058 trace_i915_gem_object_change_domain(obj
,
3059 obj
->base
.read_domains
,
3064 * Moves a single object to the GTT read, and possibly write domain.
3066 * This function returns when the move is complete, including waiting on
3070 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object
*obj
, bool write
)
3072 drm_i915_private_t
*dev_priv
= obj
->base
.dev
->dev_private
;
3073 uint32_t old_write_domain
, old_read_domains
;
3076 /* Not valid to be called on unbound objects. */
3077 if (obj
->gtt_space
== NULL
)
3080 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_GTT
)
3083 ret
= i915_gem_object_wait_rendering(obj
, !write
);
3087 i915_gem_object_flush_cpu_write_domain(obj
);
3089 old_write_domain
= obj
->base
.write_domain
;
3090 old_read_domains
= obj
->base
.read_domains
;
3092 /* It should now be out of any other write domains, and we can update
3093 * the domain values for our changes.
3095 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_GTT
) != 0);
3096 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
3098 obj
->base
.read_domains
= I915_GEM_DOMAIN_GTT
;
3099 obj
->base
.write_domain
= I915_GEM_DOMAIN_GTT
;
3103 trace_i915_gem_object_change_domain(obj
,
3107 /* And bump the LRU for this access */
3108 if (i915_gem_object_is_inactive(obj
))
3109 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
3114 int i915_gem_object_set_cache_level(struct drm_i915_gem_object
*obj
,
3115 enum i915_cache_level cache_level
)
3117 struct drm_device
*dev
= obj
->base
.dev
;
3118 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3121 if (obj
->cache_level
== cache_level
)
3124 if (obj
->pin_count
) {
3125 DRM_DEBUG("can not change the cache level of pinned objects\n");
3129 if (!i915_gem_valid_gtt_space(dev
, obj
->gtt_space
, cache_level
)) {
3130 ret
= i915_gem_object_unbind(obj
);
3135 if (obj
->gtt_space
) {
3136 ret
= i915_gem_object_finish_gpu(obj
);
3140 i915_gem_object_finish_gtt(obj
);
3142 /* Before SandyBridge, you could not use tiling or fence
3143 * registers with snooped memory, so relinquish any fences
3144 * currently pointing to our region in the aperture.
3146 if (INTEL_INFO(dev
)->gen
< 6) {
3147 ret
= i915_gem_object_put_fence(obj
);
3152 if (obj
->has_global_gtt_mapping
)
3153 i915_gem_gtt_bind_object(obj
, cache_level
);
3154 if (obj
->has_aliasing_ppgtt_mapping
)
3155 i915_ppgtt_bind_object(dev_priv
->mm
.aliasing_ppgtt
,
3158 obj
->gtt_space
->color
= cache_level
;
3161 if (cache_level
== I915_CACHE_NONE
) {
3162 u32 old_read_domains
, old_write_domain
;
3164 /* If we're coming from LLC cached, then we haven't
3165 * actually been tracking whether the data is in the
3166 * CPU cache or not, since we only allow one bit set
3167 * in obj->write_domain and have been skipping the clflushes.
3168 * Just set it to the CPU cache for now.
3170 WARN_ON(obj
->base
.write_domain
& ~I915_GEM_DOMAIN_CPU
);
3171 WARN_ON(obj
->base
.read_domains
& ~I915_GEM_DOMAIN_CPU
);
3173 old_read_domains
= obj
->base
.read_domains
;
3174 old_write_domain
= obj
->base
.write_domain
;
3176 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3177 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3179 trace_i915_gem_object_change_domain(obj
,
3184 obj
->cache_level
= cache_level
;
3185 i915_gem_verify_gtt(dev
);
3189 int i915_gem_get_caching_ioctl(struct drm_device
*dev
, void *data
,
3190 struct drm_file
*file
)
3192 struct drm_i915_gem_caching
*args
= data
;
3193 struct drm_i915_gem_object
*obj
;
3196 ret
= i915_mutex_lock_interruptible(dev
);
3200 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3201 if (&obj
->base
== NULL
) {
3206 args
->caching
= obj
->cache_level
!= I915_CACHE_NONE
;
3208 drm_gem_object_unreference(&obj
->base
);
3210 mutex_unlock(&dev
->struct_mutex
);
3214 int i915_gem_set_caching_ioctl(struct drm_device
*dev
, void *data
,
3215 struct drm_file
*file
)
3217 struct drm_i915_gem_caching
*args
= data
;
3218 struct drm_i915_gem_object
*obj
;
3219 enum i915_cache_level level
;
3222 switch (args
->caching
) {
3223 case I915_CACHING_NONE
:
3224 level
= I915_CACHE_NONE
;
3226 case I915_CACHING_CACHED
:
3227 level
= I915_CACHE_LLC
;
3233 ret
= i915_mutex_lock_interruptible(dev
);
3237 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3238 if (&obj
->base
== NULL
) {
3243 ret
= i915_gem_object_set_cache_level(obj
, level
);
3245 drm_gem_object_unreference(&obj
->base
);
3247 mutex_unlock(&dev
->struct_mutex
);
3252 * Prepare buffer for display plane (scanout, cursors, etc).
3253 * Can be called from an uninterruptible phase (modesetting) and allows
3254 * any flushes to be pipelined (for pageflips).
3257 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object
*obj
,
3259 struct intel_ring_buffer
*pipelined
)
3261 u32 old_read_domains
, old_write_domain
;
3264 if (pipelined
!= obj
->ring
) {
3265 ret
= i915_gem_object_sync(obj
, pipelined
);
3270 /* The display engine is not coherent with the LLC cache on gen6. As
3271 * a result, we make sure that the pinning that is about to occur is
3272 * done with uncached PTEs. This is lowest common denominator for all
3275 * However for gen6+, we could do better by using the GFDT bit instead
3276 * of uncaching, which would allow us to flush all the LLC-cached data
3277 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
3279 ret
= i915_gem_object_set_cache_level(obj
, I915_CACHE_NONE
);
3283 /* As the user may map the buffer once pinned in the display plane
3284 * (e.g. libkms for the bootup splash), we have to ensure that we
3285 * always use map_and_fenceable for all scanout buffers.
3287 ret
= i915_gem_object_pin(obj
, alignment
, true, false);
3291 i915_gem_object_flush_cpu_write_domain(obj
);
3293 old_write_domain
= obj
->base
.write_domain
;
3294 old_read_domains
= obj
->base
.read_domains
;
3296 /* It should now be out of any other write domains, and we can update
3297 * the domain values for our changes.
3299 obj
->base
.write_domain
= 0;
3300 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
3302 trace_i915_gem_object_change_domain(obj
,
3310 i915_gem_object_finish_gpu(struct drm_i915_gem_object
*obj
)
3314 if ((obj
->base
.read_domains
& I915_GEM_GPU_DOMAINS
) == 0)
3317 ret
= i915_gem_object_wait_rendering(obj
, false);
3321 /* Ensure that we invalidate the GPU's caches and TLBs. */
3322 obj
->base
.read_domains
&= ~I915_GEM_GPU_DOMAINS
;
3327 * Moves a single object to the CPU read, and possibly write domain.
3329 * This function returns when the move is complete, including waiting on
3333 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object
*obj
, bool write
)
3335 uint32_t old_write_domain
, old_read_domains
;
3338 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_CPU
)
3341 ret
= i915_gem_object_wait_rendering(obj
, !write
);
3345 i915_gem_object_flush_gtt_write_domain(obj
);
3347 old_write_domain
= obj
->base
.write_domain
;
3348 old_read_domains
= obj
->base
.read_domains
;
3350 /* Flush the CPU cache if it's still invalid. */
3351 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
) == 0) {
3352 i915_gem_clflush_object(obj
);
3354 obj
->base
.read_domains
|= I915_GEM_DOMAIN_CPU
;
3357 /* It should now be out of any other write domains, and we can update
3358 * the domain values for our changes.
3360 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_CPU
) != 0);
3362 /* If we're writing through the CPU, then the GPU read domains will
3363 * need to be invalidated at next use.
3366 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3367 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3370 trace_i915_gem_object_change_domain(obj
,
3377 /* Throttle our rendering by waiting until the ring has completed our requests
3378 * emitted over 20 msec ago.
3380 * Note that if we were to use the current jiffies each time around the loop,
3381 * we wouldn't escape the function with any frames outstanding if the time to
3382 * render a frame was over 20ms.
3384 * This should get us reasonable parallelism between CPU and GPU but also
3385 * relatively low latency when blocking on a particular request to finish.
3388 i915_gem_ring_throttle(struct drm_device
*dev
, struct drm_file
*file
)
3390 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3391 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
3392 unsigned long recent_enough
= jiffies
- msecs_to_jiffies(20);
3393 struct drm_i915_gem_request
*request
;
3394 struct intel_ring_buffer
*ring
= NULL
;
3398 if (atomic_read(&dev_priv
->mm
.wedged
))
3401 spin_lock(&file_priv
->mm
.lock
);
3402 list_for_each_entry(request
, &file_priv
->mm
.request_list
, client_list
) {
3403 if (time_after_eq(request
->emitted_jiffies
, recent_enough
))
3406 ring
= request
->ring
;
3407 seqno
= request
->seqno
;
3409 spin_unlock(&file_priv
->mm
.lock
);
3414 ret
= __wait_seqno(ring
, seqno
, true, NULL
);
3416 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, 0);
3422 i915_gem_object_pin(struct drm_i915_gem_object
*obj
,
3424 bool map_and_fenceable
,
3429 if (WARN_ON(obj
->pin_count
== DRM_I915_GEM_OBJECT_MAX_PIN_COUNT
))
3432 if (obj
->gtt_space
!= NULL
) {
3433 if ((alignment
&& obj
->gtt_offset
& (alignment
- 1)) ||
3434 (map_and_fenceable
&& !obj
->map_and_fenceable
)) {
3435 WARN(obj
->pin_count
,
3436 "bo is already pinned with incorrect alignment:"
3437 " offset=%x, req.alignment=%x, req.map_and_fenceable=%d,"
3438 " obj->map_and_fenceable=%d\n",
3439 obj
->gtt_offset
, alignment
,
3441 obj
->map_and_fenceable
);
3442 ret
= i915_gem_object_unbind(obj
);
3448 if (obj
->gtt_space
== NULL
) {
3449 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
3451 ret
= i915_gem_object_bind_to_gtt(obj
, alignment
,
3457 if (!dev_priv
->mm
.aliasing_ppgtt
)
3458 i915_gem_gtt_bind_object(obj
, obj
->cache_level
);
3461 if (!obj
->has_global_gtt_mapping
&& map_and_fenceable
)
3462 i915_gem_gtt_bind_object(obj
, obj
->cache_level
);
3465 obj
->pin_mappable
|= map_and_fenceable
;
3471 i915_gem_object_unpin(struct drm_i915_gem_object
*obj
)
3473 BUG_ON(obj
->pin_count
== 0);
3474 BUG_ON(obj
->gtt_space
== NULL
);
3476 if (--obj
->pin_count
== 0)
3477 obj
->pin_mappable
= false;
3481 i915_gem_pin_ioctl(struct drm_device
*dev
, void *data
,
3482 struct drm_file
*file
)
3484 struct drm_i915_gem_pin
*args
= data
;
3485 struct drm_i915_gem_object
*obj
;
3488 ret
= i915_mutex_lock_interruptible(dev
);
3492 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3493 if (&obj
->base
== NULL
) {
3498 if (obj
->madv
!= I915_MADV_WILLNEED
) {
3499 DRM_ERROR("Attempting to pin a purgeable buffer\n");
3504 if (obj
->pin_filp
!= NULL
&& obj
->pin_filp
!= file
) {
3505 DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n",
3511 obj
->user_pin_count
++;
3512 obj
->pin_filp
= file
;
3513 if (obj
->user_pin_count
== 1) {
3514 ret
= i915_gem_object_pin(obj
, args
->alignment
, true, false);
3519 /* XXX - flush the CPU caches for pinned objects
3520 * as the X server doesn't manage domains yet
3522 i915_gem_object_flush_cpu_write_domain(obj
);
3523 args
->offset
= obj
->gtt_offset
;
3525 drm_gem_object_unreference(&obj
->base
);
3527 mutex_unlock(&dev
->struct_mutex
);
3532 i915_gem_unpin_ioctl(struct drm_device
*dev
, void *data
,
3533 struct drm_file
*file
)
3535 struct drm_i915_gem_pin
*args
= data
;
3536 struct drm_i915_gem_object
*obj
;
3539 ret
= i915_mutex_lock_interruptible(dev
);
3543 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3544 if (&obj
->base
== NULL
) {
3549 if (obj
->pin_filp
!= file
) {
3550 DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n",
3555 obj
->user_pin_count
--;
3556 if (obj
->user_pin_count
== 0) {
3557 obj
->pin_filp
= NULL
;
3558 i915_gem_object_unpin(obj
);
3562 drm_gem_object_unreference(&obj
->base
);
3564 mutex_unlock(&dev
->struct_mutex
);
3569 i915_gem_busy_ioctl(struct drm_device
*dev
, void *data
,
3570 struct drm_file
*file
)
3572 struct drm_i915_gem_busy
*args
= data
;
3573 struct drm_i915_gem_object
*obj
;
3576 ret
= i915_mutex_lock_interruptible(dev
);
3580 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3581 if (&obj
->base
== NULL
) {
3586 /* Count all active objects as busy, even if they are currently not used
3587 * by the gpu. Users of this interface expect objects to eventually
3588 * become non-busy without any further actions, therefore emit any
3589 * necessary flushes here.
3591 ret
= i915_gem_object_flush_active(obj
);
3593 args
->busy
= obj
->active
;
3595 BUILD_BUG_ON(I915_NUM_RINGS
> 16);
3596 args
->busy
|= intel_ring_flag(obj
->ring
) << 16;
3599 drm_gem_object_unreference(&obj
->base
);
3601 mutex_unlock(&dev
->struct_mutex
);
3606 i915_gem_throttle_ioctl(struct drm_device
*dev
, void *data
,
3607 struct drm_file
*file_priv
)
3609 return i915_gem_ring_throttle(dev
, file_priv
);
3613 i915_gem_madvise_ioctl(struct drm_device
*dev
, void *data
,
3614 struct drm_file
*file_priv
)
3616 struct drm_i915_gem_madvise
*args
= data
;
3617 struct drm_i915_gem_object
*obj
;
3620 switch (args
->madv
) {
3621 case I915_MADV_DONTNEED
:
3622 case I915_MADV_WILLNEED
:
3628 ret
= i915_mutex_lock_interruptible(dev
);
3632 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file_priv
, args
->handle
));
3633 if (&obj
->base
== NULL
) {
3638 if (obj
->pin_count
) {
3643 if (obj
->madv
!= __I915_MADV_PURGED
)
3644 obj
->madv
= args
->madv
;
3646 /* if the object is no longer attached, discard its backing storage */
3647 if (i915_gem_object_is_purgeable(obj
) && obj
->pages
== NULL
)
3648 i915_gem_object_truncate(obj
);
3650 args
->retained
= obj
->madv
!= __I915_MADV_PURGED
;
3653 drm_gem_object_unreference(&obj
->base
);
3655 mutex_unlock(&dev
->struct_mutex
);
3659 void i915_gem_object_init(struct drm_i915_gem_object
*obj
,
3660 const struct drm_i915_gem_object_ops
*ops
)
3662 INIT_LIST_HEAD(&obj
->mm_list
);
3663 INIT_LIST_HEAD(&obj
->gtt_list
);
3664 INIT_LIST_HEAD(&obj
->ring_list
);
3665 INIT_LIST_HEAD(&obj
->exec_list
);
3669 obj
->fence_reg
= I915_FENCE_REG_NONE
;
3670 obj
->madv
= I915_MADV_WILLNEED
;
3671 /* Avoid an unnecessary call to unbind on the first bind. */
3672 obj
->map_and_fenceable
= true;
3674 i915_gem_info_add_obj(obj
->base
.dev
->dev_private
, obj
->base
.size
);
3677 static const struct drm_i915_gem_object_ops i915_gem_object_ops
= {
3678 .get_pages
= i915_gem_object_get_pages_gtt
,
3679 .put_pages
= i915_gem_object_put_pages_gtt
,
3682 struct drm_i915_gem_object
*i915_gem_alloc_object(struct drm_device
*dev
,
3685 struct drm_i915_gem_object
*obj
;
3686 struct address_space
*mapping
;
3689 obj
= kzalloc(sizeof(*obj
), GFP_KERNEL
);
3693 if (drm_gem_object_init(dev
, &obj
->base
, size
) != 0) {
3698 mask
= GFP_HIGHUSER
| __GFP_RECLAIMABLE
;
3699 if (IS_CRESTLINE(dev
) || IS_BROADWATER(dev
)) {
3700 /* 965gm cannot relocate objects above 4GiB. */
3701 mask
&= ~__GFP_HIGHMEM
;
3702 mask
|= __GFP_DMA32
;
3705 mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
3706 mapping_set_gfp_mask(mapping
, mask
);
3708 i915_gem_object_init(obj
, &i915_gem_object_ops
);
3710 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3711 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3714 /* On some devices, we can have the GPU use the LLC (the CPU
3715 * cache) for about a 10% performance improvement
3716 * compared to uncached. Graphics requests other than
3717 * display scanout are coherent with the CPU in
3718 * accessing this cache. This means in this mode we
3719 * don't need to clflush on the CPU side, and on the
3720 * GPU side we only need to flush internal caches to
3721 * get data visible to the CPU.
3723 * However, we maintain the display planes as UC, and so
3724 * need to rebind when first used as such.
3726 obj
->cache_level
= I915_CACHE_LLC
;
3728 obj
->cache_level
= I915_CACHE_NONE
;
3733 int i915_gem_init_object(struct drm_gem_object
*obj
)
3740 void i915_gem_free_object(struct drm_gem_object
*gem_obj
)
3742 struct drm_i915_gem_object
*obj
= to_intel_bo(gem_obj
);
3743 struct drm_device
*dev
= obj
->base
.dev
;
3744 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3746 trace_i915_gem_object_destroy(obj
);
3749 i915_gem_detach_phys_object(dev
, obj
);
3752 if (WARN_ON(i915_gem_object_unbind(obj
) == -ERESTARTSYS
)) {
3753 bool was_interruptible
;
3755 was_interruptible
= dev_priv
->mm
.interruptible
;
3756 dev_priv
->mm
.interruptible
= false;
3758 WARN_ON(i915_gem_object_unbind(obj
));
3760 dev_priv
->mm
.interruptible
= was_interruptible
;
3763 obj
->pages_pin_count
= 0;
3764 i915_gem_object_put_pages(obj
);
3765 i915_gem_object_free_mmap_offset(obj
);
3769 if (obj
->base
.import_attach
)
3770 drm_prime_gem_destroy(&obj
->base
, NULL
);
3772 drm_gem_object_release(&obj
->base
);
3773 i915_gem_info_remove_obj(dev_priv
, obj
->base
.size
);
3780 i915_gem_idle(struct drm_device
*dev
)
3782 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3785 mutex_lock(&dev
->struct_mutex
);
3787 if (dev_priv
->mm
.suspended
) {
3788 mutex_unlock(&dev
->struct_mutex
);
3792 ret
= i915_gpu_idle(dev
);
3794 mutex_unlock(&dev
->struct_mutex
);
3797 i915_gem_retire_requests(dev
);
3799 /* Under UMS, be paranoid and evict. */
3800 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
3801 i915_gem_evict_everything(dev
);
3803 i915_gem_reset_fences(dev
);
3805 /* Hack! Don't let anybody do execbuf while we don't control the chip.
3806 * We need to replace this with a semaphore, or something.
3807 * And not confound mm.suspended!
3809 dev_priv
->mm
.suspended
= 1;
3810 del_timer_sync(&dev_priv
->hangcheck_timer
);
3812 i915_kernel_lost_context(dev
);
3813 i915_gem_cleanup_ringbuffer(dev
);
3815 mutex_unlock(&dev
->struct_mutex
);
3817 /* Cancel the retire work handler, which should be idle now. */
3818 cancel_delayed_work_sync(&dev_priv
->mm
.retire_work
);
3823 void i915_gem_l3_remap(struct drm_device
*dev
)
3825 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3829 if (!IS_IVYBRIDGE(dev
))
3832 if (!dev_priv
->l3_parity
.remap_info
)
3835 misccpctl
= I915_READ(GEN7_MISCCPCTL
);
3836 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
& ~GEN7_DOP_CLOCK_GATE_ENABLE
);
3837 POSTING_READ(GEN7_MISCCPCTL
);
3839 for (i
= 0; i
< GEN7_L3LOG_SIZE
; i
+= 4) {
3840 u32 remap
= I915_READ(GEN7_L3LOG_BASE
+ i
);
3841 if (remap
&& remap
!= dev_priv
->l3_parity
.remap_info
[i
/4])
3842 DRM_DEBUG("0x%x was already programmed to %x\n",
3843 GEN7_L3LOG_BASE
+ i
, remap
);
3844 if (remap
&& !dev_priv
->l3_parity
.remap_info
[i
/4])
3845 DRM_DEBUG_DRIVER("Clearing remapped register\n");
3846 I915_WRITE(GEN7_L3LOG_BASE
+ i
, dev_priv
->l3_parity
.remap_info
[i
/4]);
3849 /* Make sure all the writes land before disabling dop clock gating */
3850 POSTING_READ(GEN7_L3LOG_BASE
);
3852 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
);
3855 void i915_gem_init_swizzling(struct drm_device
*dev
)
3857 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3859 if (INTEL_INFO(dev
)->gen
< 5 ||
3860 dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_NONE
)
3863 I915_WRITE(DISP_ARB_CTL
, I915_READ(DISP_ARB_CTL
) |
3864 DISP_TILE_SURFACE_SWIZZLING
);
3869 I915_WRITE(TILECTL
, I915_READ(TILECTL
) | TILECTL_SWZCTL
);
3871 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB
));
3873 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB
));
3877 intel_enable_blt(struct drm_device
*dev
)
3882 /* The blitter was dysfunctional on early prototypes */
3883 if (IS_GEN6(dev
) && dev
->pdev
->revision
< 8) {
3884 DRM_INFO("BLT not supported on this pre-production hardware;"
3885 " graphics performance will be degraded.\n");
3893 i915_gem_init_hw(struct drm_device
*dev
)
3895 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3898 if (INTEL_INFO(dev
)->gen
< 6 && !intel_enable_gtt())
3901 if (IS_HASWELL(dev
) && (I915_READ(0x120010) == 1))
3902 I915_WRITE(0x9008, I915_READ(0x9008) | 0xf0000);
3904 i915_gem_l3_remap(dev
);
3906 i915_gem_init_swizzling(dev
);
3908 ret
= intel_init_render_ring_buffer(dev
);
3913 ret
= intel_init_bsd_ring_buffer(dev
);
3915 goto cleanup_render_ring
;
3918 if (intel_enable_blt(dev
)) {
3919 ret
= intel_init_blt_ring_buffer(dev
);
3921 goto cleanup_bsd_ring
;
3924 dev_priv
->next_seqno
= 1;
3927 * XXX: There was some w/a described somewhere suggesting loading
3928 * contexts before PPGTT.
3930 i915_gem_context_init(dev
);
3931 i915_gem_init_ppgtt(dev
);
3936 intel_cleanup_ring_buffer(&dev_priv
->ring
[VCS
]);
3937 cleanup_render_ring
:
3938 intel_cleanup_ring_buffer(&dev_priv
->ring
[RCS
]);
3943 intel_enable_ppgtt(struct drm_device
*dev
)
3945 if (i915_enable_ppgtt
>= 0)
3946 return i915_enable_ppgtt
;
3948 #ifdef CONFIG_INTEL_IOMMU
3949 /* Disable ppgtt on SNB if VT-d is on. */
3950 if (INTEL_INFO(dev
)->gen
== 6 && intel_iommu_gfx_mapped
)
3957 int i915_gem_init(struct drm_device
*dev
)
3959 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3960 unsigned long gtt_size
, mappable_size
;
3963 gtt_size
= dev_priv
->mm
.gtt
->gtt_total_entries
<< PAGE_SHIFT
;
3964 mappable_size
= dev_priv
->mm
.gtt
->gtt_mappable_entries
<< PAGE_SHIFT
;
3966 mutex_lock(&dev
->struct_mutex
);
3967 if (intel_enable_ppgtt(dev
) && HAS_ALIASING_PPGTT(dev
)) {
3968 /* PPGTT pdes are stolen from global gtt ptes, so shrink the
3969 * aperture accordingly when using aliasing ppgtt. */
3970 gtt_size
-= I915_PPGTT_PD_ENTRIES
*PAGE_SIZE
;
3972 i915_gem_init_global_gtt(dev
, 0, mappable_size
, gtt_size
);
3974 ret
= i915_gem_init_aliasing_ppgtt(dev
);
3976 mutex_unlock(&dev
->struct_mutex
);
3980 /* Let GEM Manage all of the aperture.
3982 * However, leave one page at the end still bound to the scratch
3983 * page. There are a number of places where the hardware
3984 * apparently prefetches past the end of the object, and we've
3985 * seen multiple hangs with the GPU head pointer stuck in a
3986 * batchbuffer bound at the last page of the aperture. One page
3987 * should be enough to keep any prefetching inside of the
3990 i915_gem_init_global_gtt(dev
, 0, mappable_size
,
3994 ret
= i915_gem_init_hw(dev
);
3995 mutex_unlock(&dev
->struct_mutex
);
3997 i915_gem_cleanup_aliasing_ppgtt(dev
);
4001 /* Allow hardware batchbuffers unless told otherwise, but not for KMS. */
4002 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
4003 dev_priv
->dri1
.allow_batchbuffer
= 1;
4008 i915_gem_cleanup_ringbuffer(struct drm_device
*dev
)
4010 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4011 struct intel_ring_buffer
*ring
;
4014 for_each_ring(ring
, dev_priv
, i
)
4015 intel_cleanup_ring_buffer(ring
);
4019 i915_gem_entervt_ioctl(struct drm_device
*dev
, void *data
,
4020 struct drm_file
*file_priv
)
4022 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4025 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4028 if (atomic_read(&dev_priv
->mm
.wedged
)) {
4029 DRM_ERROR("Reenabling wedged hardware, good luck\n");
4030 atomic_set(&dev_priv
->mm
.wedged
, 0);
4033 mutex_lock(&dev
->struct_mutex
);
4034 dev_priv
->mm
.suspended
= 0;
4036 ret
= i915_gem_init_hw(dev
);
4038 mutex_unlock(&dev
->struct_mutex
);
4042 BUG_ON(!list_empty(&dev_priv
->mm
.active_list
));
4043 mutex_unlock(&dev
->struct_mutex
);
4045 ret
= drm_irq_install(dev
);
4047 goto cleanup_ringbuffer
;
4052 mutex_lock(&dev
->struct_mutex
);
4053 i915_gem_cleanup_ringbuffer(dev
);
4054 dev_priv
->mm
.suspended
= 1;
4055 mutex_unlock(&dev
->struct_mutex
);
4061 i915_gem_leavevt_ioctl(struct drm_device
*dev
, void *data
,
4062 struct drm_file
*file_priv
)
4064 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4067 drm_irq_uninstall(dev
);
4068 return i915_gem_idle(dev
);
4072 i915_gem_lastclose(struct drm_device
*dev
)
4076 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4079 ret
= i915_gem_idle(dev
);
4081 DRM_ERROR("failed to idle hardware: %d\n", ret
);
4085 init_ring_lists(struct intel_ring_buffer
*ring
)
4087 INIT_LIST_HEAD(&ring
->active_list
);
4088 INIT_LIST_HEAD(&ring
->request_list
);
4092 i915_gem_load(struct drm_device
*dev
)
4095 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4097 INIT_LIST_HEAD(&dev_priv
->mm
.active_list
);
4098 INIT_LIST_HEAD(&dev_priv
->mm
.inactive_list
);
4099 INIT_LIST_HEAD(&dev_priv
->mm
.unbound_list
);
4100 INIT_LIST_HEAD(&dev_priv
->mm
.bound_list
);
4101 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
4102 for (i
= 0; i
< I915_NUM_RINGS
; i
++)
4103 init_ring_lists(&dev_priv
->ring
[i
]);
4104 for (i
= 0; i
< I915_MAX_NUM_FENCES
; i
++)
4105 INIT_LIST_HEAD(&dev_priv
->fence_regs
[i
].lru_list
);
4106 INIT_DELAYED_WORK(&dev_priv
->mm
.retire_work
,
4107 i915_gem_retire_work_handler
);
4108 init_completion(&dev_priv
->error_completion
);
4110 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
4112 I915_WRITE(MI_ARB_STATE
,
4113 _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE
));
4116 dev_priv
->relative_constants_mode
= I915_EXEC_CONSTANTS_REL_GENERAL
;
4118 /* Old X drivers will take 0-2 for front, back, depth buffers */
4119 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
4120 dev_priv
->fence_reg_start
= 3;
4122 if (INTEL_INFO(dev
)->gen
>= 4 || IS_I945G(dev
) || IS_I945GM(dev
) || IS_G33(dev
))
4123 dev_priv
->num_fence_regs
= 16;
4125 dev_priv
->num_fence_regs
= 8;
4127 /* Initialize fence registers to zero */
4128 i915_gem_reset_fences(dev
);
4130 i915_gem_detect_bit_6_swizzle(dev
);
4131 init_waitqueue_head(&dev_priv
->pending_flip_queue
);
4133 dev_priv
->mm
.interruptible
= true;
4135 dev_priv
->mm
.inactive_shrinker
.shrink
= i915_gem_inactive_shrink
;
4136 dev_priv
->mm
.inactive_shrinker
.seeks
= DEFAULT_SEEKS
;
4137 register_shrinker(&dev_priv
->mm
.inactive_shrinker
);
4141 * Create a physically contiguous memory object for this object
4142 * e.g. for cursor + overlay regs
4144 static int i915_gem_init_phys_object(struct drm_device
*dev
,
4145 int id
, int size
, int align
)
4147 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4148 struct drm_i915_gem_phys_object
*phys_obj
;
4151 if (dev_priv
->mm
.phys_objs
[id
- 1] || !size
)
4154 phys_obj
= kzalloc(sizeof(struct drm_i915_gem_phys_object
), GFP_KERNEL
);
4160 phys_obj
->handle
= drm_pci_alloc(dev
, size
, align
);
4161 if (!phys_obj
->handle
) {
4166 set_memory_wc((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
4169 dev_priv
->mm
.phys_objs
[id
- 1] = phys_obj
;
4177 static void i915_gem_free_phys_object(struct drm_device
*dev
, int id
)
4179 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4180 struct drm_i915_gem_phys_object
*phys_obj
;
4182 if (!dev_priv
->mm
.phys_objs
[id
- 1])
4185 phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4186 if (phys_obj
->cur_obj
) {
4187 i915_gem_detach_phys_object(dev
, phys_obj
->cur_obj
);
4191 set_memory_wb((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
4193 drm_pci_free(dev
, phys_obj
->handle
);
4195 dev_priv
->mm
.phys_objs
[id
- 1] = NULL
;
4198 void i915_gem_free_all_phys_object(struct drm_device
*dev
)
4202 for (i
= I915_GEM_PHYS_CURSOR_0
; i
<= I915_MAX_PHYS_OBJECT
; i
++)
4203 i915_gem_free_phys_object(dev
, i
);
4206 void i915_gem_detach_phys_object(struct drm_device
*dev
,
4207 struct drm_i915_gem_object
*obj
)
4209 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
4216 vaddr
= obj
->phys_obj
->handle
->vaddr
;
4218 page_count
= obj
->base
.size
/ PAGE_SIZE
;
4219 for (i
= 0; i
< page_count
; i
++) {
4220 struct page
*page
= shmem_read_mapping_page(mapping
, i
);
4221 if (!IS_ERR(page
)) {
4222 char *dst
= kmap_atomic(page
);
4223 memcpy(dst
, vaddr
+ i
*PAGE_SIZE
, PAGE_SIZE
);
4226 drm_clflush_pages(&page
, 1);
4228 set_page_dirty(page
);
4229 mark_page_accessed(page
);
4230 page_cache_release(page
);
4233 i915_gem_chipset_flush(dev
);
4235 obj
->phys_obj
->cur_obj
= NULL
;
4236 obj
->phys_obj
= NULL
;
4240 i915_gem_attach_phys_object(struct drm_device
*dev
,
4241 struct drm_i915_gem_object
*obj
,
4245 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
4246 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4251 if (id
> I915_MAX_PHYS_OBJECT
)
4254 if (obj
->phys_obj
) {
4255 if (obj
->phys_obj
->id
== id
)
4257 i915_gem_detach_phys_object(dev
, obj
);
4260 /* create a new object */
4261 if (!dev_priv
->mm
.phys_objs
[id
- 1]) {
4262 ret
= i915_gem_init_phys_object(dev
, id
,
4263 obj
->base
.size
, align
);
4265 DRM_ERROR("failed to init phys object %d size: %zu\n",
4266 id
, obj
->base
.size
);
4271 /* bind to the object */
4272 obj
->phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4273 obj
->phys_obj
->cur_obj
= obj
;
4275 page_count
= obj
->base
.size
/ PAGE_SIZE
;
4277 for (i
= 0; i
< page_count
; i
++) {
4281 page
= shmem_read_mapping_page(mapping
, i
);
4283 return PTR_ERR(page
);
4285 src
= kmap_atomic(page
);
4286 dst
= obj
->phys_obj
->handle
->vaddr
+ (i
* PAGE_SIZE
);
4287 memcpy(dst
, src
, PAGE_SIZE
);
4290 mark_page_accessed(page
);
4291 page_cache_release(page
);
4298 i915_gem_phys_pwrite(struct drm_device
*dev
,
4299 struct drm_i915_gem_object
*obj
,
4300 struct drm_i915_gem_pwrite
*args
,
4301 struct drm_file
*file_priv
)
4303 void *vaddr
= obj
->phys_obj
->handle
->vaddr
+ args
->offset
;
4304 char __user
*user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
4306 if (__copy_from_user_inatomic_nocache(vaddr
, user_data
, args
->size
)) {
4307 unsigned long unwritten
;
4309 /* The physical object once assigned is fixed for the lifetime
4310 * of the obj, so we can safely drop the lock and continue
4313 mutex_unlock(&dev
->struct_mutex
);
4314 unwritten
= copy_from_user(vaddr
, user_data
, args
->size
);
4315 mutex_lock(&dev
->struct_mutex
);
4320 i915_gem_chipset_flush(dev
);
4324 void i915_gem_release(struct drm_device
*dev
, struct drm_file
*file
)
4326 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
4328 /* Clean up our request list when the client is going away, so that
4329 * later retire_requests won't dereference our soon-to-be-gone
4332 spin_lock(&file_priv
->mm
.lock
);
4333 while (!list_empty(&file_priv
->mm
.request_list
)) {
4334 struct drm_i915_gem_request
*request
;
4336 request
= list_first_entry(&file_priv
->mm
.request_list
,
4337 struct drm_i915_gem_request
,
4339 list_del(&request
->client_list
);
4340 request
->file_priv
= NULL
;
4342 spin_unlock(&file_priv
->mm
.lock
);
4346 i915_gem_inactive_shrink(struct shrinker
*shrinker
, struct shrink_control
*sc
)
4348 struct drm_i915_private
*dev_priv
=
4349 container_of(shrinker
,
4350 struct drm_i915_private
,
4351 mm
.inactive_shrinker
);
4352 struct drm_device
*dev
= dev_priv
->dev
;
4353 struct drm_i915_gem_object
*obj
;
4354 int nr_to_scan
= sc
->nr_to_scan
;
4357 if (!mutex_trylock(&dev
->struct_mutex
))
4361 nr_to_scan
-= i915_gem_purge(dev_priv
, nr_to_scan
);
4363 i915_gem_shrink_all(dev_priv
);
4367 list_for_each_entry(obj
, &dev_priv
->mm
.unbound_list
, gtt_list
)
4368 if (obj
->pages_pin_count
== 0)
4369 cnt
+= obj
->base
.size
>> PAGE_SHIFT
;
4370 list_for_each_entry(obj
, &dev_priv
->mm
.bound_list
, gtt_list
)
4371 if (obj
->pin_count
== 0 && obj
->pages_pin_count
== 0)
4372 cnt
+= obj
->base
.size
>> PAGE_SHIFT
;
4374 mutex_unlock(&dev
->struct_mutex
);