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/drm_vma_manager.h>
30 #include <drm/i915_drm.h>
32 #include "i915_trace.h"
33 #include "intel_drv.h"
34 #include <linux/oom.h>
35 #include <linux/shmem_fs.h>
36 #include <linux/slab.h>
37 #include <linux/swap.h>
38 #include <linux/pci.h>
39 #include <linux/dma-buf.h>
41 static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
);
42 static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
,
44 static __must_check
int
45 i915_gem_object_wait_rendering(struct drm_i915_gem_object
*obj
,
48 i915_gem_object_retire(struct drm_i915_gem_object
*obj
);
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 unsigned long i915_gem_shrinker_count(struct shrinker
*shrinker
,
57 struct shrink_control
*sc
);
58 static unsigned long i915_gem_shrinker_scan(struct shrinker
*shrinker
,
59 struct shrink_control
*sc
);
60 static int i915_gem_shrinker_oom(struct notifier_block
*nb
,
63 static unsigned long i915_gem_shrink_all(struct drm_i915_private
*dev_priv
);
65 static bool cpu_cache_is_coherent(struct drm_device
*dev
,
66 enum i915_cache_level level
)
68 return HAS_LLC(dev
) || level
!= I915_CACHE_NONE
;
71 static bool cpu_write_needs_clflush(struct drm_i915_gem_object
*obj
)
73 if (!cpu_cache_is_coherent(obj
->base
.dev
, obj
->cache_level
))
76 return obj
->pin_display
;
79 static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object
*obj
)
82 i915_gem_release_mmap(obj
);
84 /* As we do not have an associated fence register, we will force
85 * a tiling change if we ever need to acquire one.
87 obj
->fence_dirty
= false;
88 obj
->fence_reg
= I915_FENCE_REG_NONE
;
91 /* some bookkeeping */
92 static void i915_gem_info_add_obj(struct drm_i915_private
*dev_priv
,
95 spin_lock(&dev_priv
->mm
.object_stat_lock
);
96 dev_priv
->mm
.object_count
++;
97 dev_priv
->mm
.object_memory
+= size
;
98 spin_unlock(&dev_priv
->mm
.object_stat_lock
);
101 static void i915_gem_info_remove_obj(struct drm_i915_private
*dev_priv
,
104 spin_lock(&dev_priv
->mm
.object_stat_lock
);
105 dev_priv
->mm
.object_count
--;
106 dev_priv
->mm
.object_memory
-= size
;
107 spin_unlock(&dev_priv
->mm
.object_stat_lock
);
111 i915_gem_wait_for_error(struct i915_gpu_error
*error
)
115 #define EXIT_COND (!i915_reset_in_progress(error) || \
116 i915_terminally_wedged(error))
121 * Only wait 10 seconds for the gpu reset to complete to avoid hanging
122 * userspace. If it takes that long something really bad is going on and
123 * we should simply try to bail out and fail as gracefully as possible.
125 ret
= wait_event_interruptible_timeout(error
->reset_queue
,
129 DRM_ERROR("Timed out waiting for the gpu reset to complete\n");
131 } else if (ret
< 0) {
139 int i915_mutex_lock_interruptible(struct drm_device
*dev
)
141 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
144 ret
= i915_gem_wait_for_error(&dev_priv
->gpu_error
);
148 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
152 WARN_ON(i915_verify_lists(dev
));
157 i915_gem_object_is_inactive(struct drm_i915_gem_object
*obj
)
159 return i915_gem_obj_bound_any(obj
) && !obj
->active
;
163 i915_gem_init_ioctl(struct drm_device
*dev
, void *data
,
164 struct drm_file
*file
)
166 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
167 struct drm_i915_gem_init
*args
= data
;
169 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
172 if (args
->gtt_start
>= args
->gtt_end
||
173 (args
->gtt_end
| args
->gtt_start
) & (PAGE_SIZE
- 1))
176 /* GEM with user mode setting was never supported on ilk and later. */
177 if (INTEL_INFO(dev
)->gen
>= 5)
180 mutex_lock(&dev
->struct_mutex
);
181 i915_gem_setup_global_gtt(dev
, args
->gtt_start
, args
->gtt_end
,
183 dev_priv
->gtt
.mappable_end
= args
->gtt_end
;
184 mutex_unlock(&dev
->struct_mutex
);
190 i915_gem_get_aperture_ioctl(struct drm_device
*dev
, void *data
,
191 struct drm_file
*file
)
193 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
194 struct drm_i915_gem_get_aperture
*args
= data
;
195 struct drm_i915_gem_object
*obj
;
199 mutex_lock(&dev
->struct_mutex
);
200 list_for_each_entry(obj
, &dev_priv
->mm
.bound_list
, global_list
)
201 if (i915_gem_obj_is_pinned(obj
))
202 pinned
+= i915_gem_obj_ggtt_size(obj
);
203 mutex_unlock(&dev
->struct_mutex
);
205 args
->aper_size
= dev_priv
->gtt
.base
.total
;
206 args
->aper_available_size
= args
->aper_size
- pinned
;
212 i915_gem_object_get_pages_phys(struct drm_i915_gem_object
*obj
)
214 struct address_space
*mapping
= file_inode(obj
->base
.filp
)->i_mapping
;
215 char *vaddr
= obj
->phys_handle
->vaddr
;
217 struct scatterlist
*sg
;
220 if (WARN_ON(i915_gem_object_needs_bit17_swizzle(obj
)))
223 for (i
= 0; i
< obj
->base
.size
/ PAGE_SIZE
; i
++) {
227 page
= shmem_read_mapping_page(mapping
, i
);
229 return PTR_ERR(page
);
231 src
= kmap_atomic(page
);
232 memcpy(vaddr
, src
, PAGE_SIZE
);
233 drm_clflush_virt_range(vaddr
, PAGE_SIZE
);
236 page_cache_release(page
);
240 i915_gem_chipset_flush(obj
->base
.dev
);
242 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
246 if (sg_alloc_table(st
, 1, GFP_KERNEL
)) {
253 sg
->length
= obj
->base
.size
;
255 sg_dma_address(sg
) = obj
->phys_handle
->busaddr
;
256 sg_dma_len(sg
) = obj
->base
.size
;
259 obj
->has_dma_mapping
= true;
264 i915_gem_object_put_pages_phys(struct drm_i915_gem_object
*obj
)
268 BUG_ON(obj
->madv
== __I915_MADV_PURGED
);
270 ret
= i915_gem_object_set_to_cpu_domain(obj
, true);
272 /* In the event of a disaster, abandon all caches and
275 WARN_ON(ret
!= -EIO
);
276 obj
->base
.read_domains
= obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
279 if (obj
->madv
== I915_MADV_DONTNEED
)
283 struct address_space
*mapping
= file_inode(obj
->base
.filp
)->i_mapping
;
284 char *vaddr
= obj
->phys_handle
->vaddr
;
287 for (i
= 0; i
< obj
->base
.size
/ PAGE_SIZE
; i
++) {
291 page
= shmem_read_mapping_page(mapping
, i
);
295 dst
= kmap_atomic(page
);
296 drm_clflush_virt_range(vaddr
, PAGE_SIZE
);
297 memcpy(dst
, vaddr
, PAGE_SIZE
);
300 set_page_dirty(page
);
301 if (obj
->madv
== I915_MADV_WILLNEED
)
302 mark_page_accessed(page
);
303 page_cache_release(page
);
309 sg_free_table(obj
->pages
);
312 obj
->has_dma_mapping
= false;
316 i915_gem_object_release_phys(struct drm_i915_gem_object
*obj
)
318 drm_pci_free(obj
->base
.dev
, obj
->phys_handle
);
321 static const struct drm_i915_gem_object_ops i915_gem_phys_ops
= {
322 .get_pages
= i915_gem_object_get_pages_phys
,
323 .put_pages
= i915_gem_object_put_pages_phys
,
324 .release
= i915_gem_object_release_phys
,
328 drop_pages(struct drm_i915_gem_object
*obj
)
330 struct i915_vma
*vma
, *next
;
333 drm_gem_object_reference(&obj
->base
);
334 list_for_each_entry_safe(vma
, next
, &obj
->vma_list
, vma_link
)
335 if (i915_vma_unbind(vma
))
338 ret
= i915_gem_object_put_pages(obj
);
339 drm_gem_object_unreference(&obj
->base
);
345 i915_gem_object_attach_phys(struct drm_i915_gem_object
*obj
,
348 drm_dma_handle_t
*phys
;
351 if (obj
->phys_handle
) {
352 if ((unsigned long)obj
->phys_handle
->vaddr
& (align
-1))
358 if (obj
->madv
!= I915_MADV_WILLNEED
)
361 if (obj
->base
.filp
== NULL
)
364 ret
= drop_pages(obj
);
368 /* create a new object */
369 phys
= drm_pci_alloc(obj
->base
.dev
, obj
->base
.size
, align
);
373 obj
->phys_handle
= phys
;
374 obj
->ops
= &i915_gem_phys_ops
;
376 return i915_gem_object_get_pages(obj
);
380 i915_gem_phys_pwrite(struct drm_i915_gem_object
*obj
,
381 struct drm_i915_gem_pwrite
*args
,
382 struct drm_file
*file_priv
)
384 struct drm_device
*dev
= obj
->base
.dev
;
385 void *vaddr
= obj
->phys_handle
->vaddr
+ args
->offset
;
386 char __user
*user_data
= to_user_ptr(args
->data_ptr
);
389 /* We manually control the domain here and pretend that it
390 * remains coherent i.e. in the GTT domain, like shmem_pwrite.
392 ret
= i915_gem_object_wait_rendering(obj
, false);
396 if (__copy_from_user_inatomic_nocache(vaddr
, user_data
, args
->size
)) {
397 unsigned long unwritten
;
399 /* The physical object once assigned is fixed for the lifetime
400 * of the obj, so we can safely drop the lock and continue
403 mutex_unlock(&dev
->struct_mutex
);
404 unwritten
= copy_from_user(vaddr
, user_data
, args
->size
);
405 mutex_lock(&dev
->struct_mutex
);
410 drm_clflush_virt_range(vaddr
, args
->size
);
411 i915_gem_chipset_flush(dev
);
415 void *i915_gem_object_alloc(struct drm_device
*dev
)
417 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
418 return kmem_cache_zalloc(dev_priv
->slab
, GFP_KERNEL
);
421 void i915_gem_object_free(struct drm_i915_gem_object
*obj
)
423 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
424 kmem_cache_free(dev_priv
->slab
, obj
);
428 i915_gem_create(struct drm_file
*file
,
429 struct drm_device
*dev
,
433 struct drm_i915_gem_object
*obj
;
437 size
= roundup(size
, PAGE_SIZE
);
441 /* Allocate the new object */
442 obj
= i915_gem_alloc_object(dev
, size
);
446 ret
= drm_gem_handle_create(file
, &obj
->base
, &handle
);
447 /* drop reference from allocate - handle holds it now */
448 drm_gem_object_unreference_unlocked(&obj
->base
);
457 i915_gem_dumb_create(struct drm_file
*file
,
458 struct drm_device
*dev
,
459 struct drm_mode_create_dumb
*args
)
461 /* have to work out size/pitch and return them */
462 args
->pitch
= ALIGN(args
->width
* DIV_ROUND_UP(args
->bpp
, 8), 64);
463 args
->size
= args
->pitch
* args
->height
;
464 return i915_gem_create(file
, dev
,
465 args
->size
, &args
->handle
);
469 * Creates a new mm object and returns a handle to it.
472 i915_gem_create_ioctl(struct drm_device
*dev
, void *data
,
473 struct drm_file
*file
)
475 struct drm_i915_gem_create
*args
= data
;
477 return i915_gem_create(file
, dev
,
478 args
->size
, &args
->handle
);
482 __copy_to_user_swizzled(char __user
*cpu_vaddr
,
483 const char *gpu_vaddr
, int gpu_offset
,
486 int ret
, cpu_offset
= 0;
489 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
490 int this_length
= min(cacheline_end
- gpu_offset
, length
);
491 int swizzled_gpu_offset
= gpu_offset
^ 64;
493 ret
= __copy_to_user(cpu_vaddr
+ cpu_offset
,
494 gpu_vaddr
+ swizzled_gpu_offset
,
499 cpu_offset
+= this_length
;
500 gpu_offset
+= this_length
;
501 length
-= this_length
;
508 __copy_from_user_swizzled(char *gpu_vaddr
, int gpu_offset
,
509 const char __user
*cpu_vaddr
,
512 int ret
, cpu_offset
= 0;
515 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
516 int this_length
= min(cacheline_end
- gpu_offset
, length
);
517 int swizzled_gpu_offset
= gpu_offset
^ 64;
519 ret
= __copy_from_user(gpu_vaddr
+ swizzled_gpu_offset
,
520 cpu_vaddr
+ cpu_offset
,
525 cpu_offset
+= this_length
;
526 gpu_offset
+= this_length
;
527 length
-= this_length
;
534 * Pins the specified object's pages and synchronizes the object with
535 * GPU accesses. Sets needs_clflush to non-zero if the caller should
536 * flush the object from the CPU cache.
538 int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object
*obj
,
548 if (!(obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
)) {
549 /* If we're not in the cpu read domain, set ourself into the gtt
550 * read domain and manually flush cachelines (if required). This
551 * optimizes for the case when the gpu will dirty the data
552 * anyway again before the next pread happens. */
553 *needs_clflush
= !cpu_cache_is_coherent(obj
->base
.dev
,
555 ret
= i915_gem_object_wait_rendering(obj
, true);
559 i915_gem_object_retire(obj
);
562 ret
= i915_gem_object_get_pages(obj
);
566 i915_gem_object_pin_pages(obj
);
571 /* Per-page copy function for the shmem pread fastpath.
572 * Flushes invalid cachelines before reading the target if
573 * needs_clflush is set. */
575 shmem_pread_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
576 char __user
*user_data
,
577 bool page_do_bit17_swizzling
, bool needs_clflush
)
582 if (unlikely(page_do_bit17_swizzling
))
585 vaddr
= kmap_atomic(page
);
587 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
589 ret
= __copy_to_user_inatomic(user_data
,
590 vaddr
+ shmem_page_offset
,
592 kunmap_atomic(vaddr
);
594 return ret
? -EFAULT
: 0;
598 shmem_clflush_swizzled_range(char *addr
, unsigned long length
,
601 if (unlikely(swizzled
)) {
602 unsigned long start
= (unsigned long) addr
;
603 unsigned long end
= (unsigned long) addr
+ length
;
605 /* For swizzling simply ensure that we always flush both
606 * channels. Lame, but simple and it works. Swizzled
607 * pwrite/pread is far from a hotpath - current userspace
608 * doesn't use it at all. */
609 start
= round_down(start
, 128);
610 end
= round_up(end
, 128);
612 drm_clflush_virt_range((void *)start
, end
- start
);
614 drm_clflush_virt_range(addr
, length
);
619 /* Only difference to the fast-path function is that this can handle bit17
620 * and uses non-atomic copy and kmap functions. */
622 shmem_pread_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
623 char __user
*user_data
,
624 bool page_do_bit17_swizzling
, bool needs_clflush
)
631 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
633 page_do_bit17_swizzling
);
635 if (page_do_bit17_swizzling
)
636 ret
= __copy_to_user_swizzled(user_data
,
637 vaddr
, shmem_page_offset
,
640 ret
= __copy_to_user(user_data
,
641 vaddr
+ shmem_page_offset
,
645 return ret
? - EFAULT
: 0;
649 i915_gem_shmem_pread(struct drm_device
*dev
,
650 struct drm_i915_gem_object
*obj
,
651 struct drm_i915_gem_pread
*args
,
652 struct drm_file
*file
)
654 char __user
*user_data
;
657 int shmem_page_offset
, page_length
, ret
= 0;
658 int obj_do_bit17_swizzling
, page_do_bit17_swizzling
;
660 int needs_clflush
= 0;
661 struct sg_page_iter sg_iter
;
663 user_data
= to_user_ptr(args
->data_ptr
);
666 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
668 ret
= i915_gem_obj_prepare_shmem_read(obj
, &needs_clflush
);
672 offset
= args
->offset
;
674 for_each_sg_page(obj
->pages
->sgl
, &sg_iter
, obj
->pages
->nents
,
675 offset
>> PAGE_SHIFT
) {
676 struct page
*page
= sg_page_iter_page(&sg_iter
);
681 /* Operation in this page
683 * shmem_page_offset = offset within page in shmem file
684 * page_length = bytes to copy for this page
686 shmem_page_offset
= offset_in_page(offset
);
687 page_length
= remain
;
688 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
689 page_length
= PAGE_SIZE
- shmem_page_offset
;
691 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
692 (page_to_phys(page
) & (1 << 17)) != 0;
694 ret
= shmem_pread_fast(page
, shmem_page_offset
, page_length
,
695 user_data
, page_do_bit17_swizzling
,
700 mutex_unlock(&dev
->struct_mutex
);
702 if (likely(!i915
.prefault_disable
) && !prefaulted
) {
703 ret
= fault_in_multipages_writeable(user_data
, remain
);
704 /* Userspace is tricking us, but we've already clobbered
705 * its pages with the prefault and promised to write the
706 * data up to the first fault. Hence ignore any errors
707 * and just continue. */
712 ret
= shmem_pread_slow(page
, shmem_page_offset
, page_length
,
713 user_data
, page_do_bit17_swizzling
,
716 mutex_lock(&dev
->struct_mutex
);
722 remain
-= page_length
;
723 user_data
+= page_length
;
724 offset
+= page_length
;
728 i915_gem_object_unpin_pages(obj
);
734 * Reads data from the object referenced by handle.
736 * On error, the contents of *data are undefined.
739 i915_gem_pread_ioctl(struct drm_device
*dev
, void *data
,
740 struct drm_file
*file
)
742 struct drm_i915_gem_pread
*args
= data
;
743 struct drm_i915_gem_object
*obj
;
749 if (!access_ok(VERIFY_WRITE
,
750 to_user_ptr(args
->data_ptr
),
754 ret
= i915_mutex_lock_interruptible(dev
);
758 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
759 if (&obj
->base
== NULL
) {
764 /* Bounds check source. */
765 if (args
->offset
> obj
->base
.size
||
766 args
->size
> obj
->base
.size
- args
->offset
) {
771 /* prime objects have no backing filp to GEM pread/pwrite
774 if (!obj
->base
.filp
) {
779 trace_i915_gem_object_pread(obj
, args
->offset
, args
->size
);
781 ret
= i915_gem_shmem_pread(dev
, obj
, args
, file
);
784 drm_gem_object_unreference(&obj
->base
);
786 mutex_unlock(&dev
->struct_mutex
);
790 /* This is the fast write path which cannot handle
791 * page faults in the source data
795 fast_user_write(struct io_mapping
*mapping
,
796 loff_t page_base
, int page_offset
,
797 char __user
*user_data
,
800 void __iomem
*vaddr_atomic
;
802 unsigned long unwritten
;
804 vaddr_atomic
= io_mapping_map_atomic_wc(mapping
, page_base
);
805 /* We can use the cpu mem copy function because this is X86. */
806 vaddr
= (void __force
*)vaddr_atomic
+ page_offset
;
807 unwritten
= __copy_from_user_inatomic_nocache(vaddr
,
809 io_mapping_unmap_atomic(vaddr_atomic
);
814 * This is the fast pwrite path, where we copy the data directly from the
815 * user into the GTT, uncached.
818 i915_gem_gtt_pwrite_fast(struct drm_device
*dev
,
819 struct drm_i915_gem_object
*obj
,
820 struct drm_i915_gem_pwrite
*args
,
821 struct drm_file
*file
)
823 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
825 loff_t offset
, page_base
;
826 char __user
*user_data
;
827 int page_offset
, page_length
, ret
;
829 ret
= i915_gem_obj_ggtt_pin(obj
, 0, PIN_MAPPABLE
| PIN_NONBLOCK
);
833 ret
= i915_gem_object_set_to_gtt_domain(obj
, true);
837 ret
= i915_gem_object_put_fence(obj
);
841 user_data
= to_user_ptr(args
->data_ptr
);
844 offset
= i915_gem_obj_ggtt_offset(obj
) + args
->offset
;
847 /* Operation in this page
849 * page_base = page offset within aperture
850 * page_offset = offset within page
851 * page_length = bytes to copy for this page
853 page_base
= offset
& PAGE_MASK
;
854 page_offset
= offset_in_page(offset
);
855 page_length
= remain
;
856 if ((page_offset
+ remain
) > PAGE_SIZE
)
857 page_length
= PAGE_SIZE
- page_offset
;
859 /* If we get a fault while copying data, then (presumably) our
860 * source page isn't available. Return the error and we'll
861 * retry in the slow path.
863 if (fast_user_write(dev_priv
->gtt
.mappable
, page_base
,
864 page_offset
, user_data
, page_length
)) {
869 remain
-= page_length
;
870 user_data
+= page_length
;
871 offset
+= page_length
;
875 i915_gem_object_ggtt_unpin(obj
);
880 /* Per-page copy function for the shmem pwrite fastpath.
881 * Flushes invalid cachelines before writing to the target if
882 * needs_clflush_before is set and flushes out any written cachelines after
883 * writing if needs_clflush is set. */
885 shmem_pwrite_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
886 char __user
*user_data
,
887 bool page_do_bit17_swizzling
,
888 bool needs_clflush_before
,
889 bool needs_clflush_after
)
894 if (unlikely(page_do_bit17_swizzling
))
897 vaddr
= kmap_atomic(page
);
898 if (needs_clflush_before
)
899 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
901 ret
= __copy_from_user_inatomic(vaddr
+ shmem_page_offset
,
902 user_data
, page_length
);
903 if (needs_clflush_after
)
904 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
906 kunmap_atomic(vaddr
);
908 return ret
? -EFAULT
: 0;
911 /* Only difference to the fast-path function is that this can handle bit17
912 * and uses non-atomic copy and kmap functions. */
914 shmem_pwrite_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
915 char __user
*user_data
,
916 bool page_do_bit17_swizzling
,
917 bool needs_clflush_before
,
918 bool needs_clflush_after
)
924 if (unlikely(needs_clflush_before
|| page_do_bit17_swizzling
))
925 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
927 page_do_bit17_swizzling
);
928 if (page_do_bit17_swizzling
)
929 ret
= __copy_from_user_swizzled(vaddr
, shmem_page_offset
,
933 ret
= __copy_from_user(vaddr
+ shmem_page_offset
,
936 if (needs_clflush_after
)
937 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
939 page_do_bit17_swizzling
);
942 return ret
? -EFAULT
: 0;
946 i915_gem_shmem_pwrite(struct drm_device
*dev
,
947 struct drm_i915_gem_object
*obj
,
948 struct drm_i915_gem_pwrite
*args
,
949 struct drm_file
*file
)
953 char __user
*user_data
;
954 int shmem_page_offset
, page_length
, ret
= 0;
955 int obj_do_bit17_swizzling
, page_do_bit17_swizzling
;
956 int hit_slowpath
= 0;
957 int needs_clflush_after
= 0;
958 int needs_clflush_before
= 0;
959 struct sg_page_iter sg_iter
;
961 user_data
= to_user_ptr(args
->data_ptr
);
964 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
966 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
967 /* If we're not in the cpu write domain, set ourself into the gtt
968 * write domain and manually flush cachelines (if required). This
969 * optimizes for the case when the gpu will use the data
970 * right away and we therefore have to clflush anyway. */
971 needs_clflush_after
= cpu_write_needs_clflush(obj
);
972 ret
= i915_gem_object_wait_rendering(obj
, false);
976 i915_gem_object_retire(obj
);
978 /* Same trick applies to invalidate partially written cachelines read
980 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
) == 0)
981 needs_clflush_before
=
982 !cpu_cache_is_coherent(dev
, obj
->cache_level
);
984 ret
= i915_gem_object_get_pages(obj
);
988 i915_gem_object_pin_pages(obj
);
990 offset
= args
->offset
;
993 for_each_sg_page(obj
->pages
->sgl
, &sg_iter
, obj
->pages
->nents
,
994 offset
>> PAGE_SHIFT
) {
995 struct page
*page
= sg_page_iter_page(&sg_iter
);
996 int partial_cacheline_write
;
1001 /* Operation in this page
1003 * shmem_page_offset = offset within page in shmem file
1004 * page_length = bytes to copy for this page
1006 shmem_page_offset
= offset_in_page(offset
);
1008 page_length
= remain
;
1009 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
1010 page_length
= PAGE_SIZE
- shmem_page_offset
;
1012 /* If we don't overwrite a cacheline completely we need to be
1013 * careful to have up-to-date data by first clflushing. Don't
1014 * overcomplicate things and flush the entire patch. */
1015 partial_cacheline_write
= needs_clflush_before
&&
1016 ((shmem_page_offset
| page_length
)
1017 & (boot_cpu_data
.x86_clflush_size
- 1));
1019 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
1020 (page_to_phys(page
) & (1 << 17)) != 0;
1022 ret
= shmem_pwrite_fast(page
, shmem_page_offset
, page_length
,
1023 user_data
, page_do_bit17_swizzling
,
1024 partial_cacheline_write
,
1025 needs_clflush_after
);
1030 mutex_unlock(&dev
->struct_mutex
);
1031 ret
= shmem_pwrite_slow(page
, shmem_page_offset
, page_length
,
1032 user_data
, page_do_bit17_swizzling
,
1033 partial_cacheline_write
,
1034 needs_clflush_after
);
1036 mutex_lock(&dev
->struct_mutex
);
1042 remain
-= page_length
;
1043 user_data
+= page_length
;
1044 offset
+= page_length
;
1048 i915_gem_object_unpin_pages(obj
);
1052 * Fixup: Flush cpu caches in case we didn't flush the dirty
1053 * cachelines in-line while writing and the object moved
1054 * out of the cpu write domain while we've dropped the lock.
1056 if (!needs_clflush_after
&&
1057 obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
1058 if (i915_gem_clflush_object(obj
, obj
->pin_display
))
1059 i915_gem_chipset_flush(dev
);
1063 if (needs_clflush_after
)
1064 i915_gem_chipset_flush(dev
);
1070 * Writes data to the object referenced by handle.
1072 * On error, the contents of the buffer that were to be modified are undefined.
1075 i915_gem_pwrite_ioctl(struct drm_device
*dev
, void *data
,
1076 struct drm_file
*file
)
1078 struct drm_i915_gem_pwrite
*args
= data
;
1079 struct drm_i915_gem_object
*obj
;
1082 if (args
->size
== 0)
1085 if (!access_ok(VERIFY_READ
,
1086 to_user_ptr(args
->data_ptr
),
1090 if (likely(!i915
.prefault_disable
)) {
1091 ret
= fault_in_multipages_readable(to_user_ptr(args
->data_ptr
),
1097 ret
= i915_mutex_lock_interruptible(dev
);
1101 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1102 if (&obj
->base
== NULL
) {
1107 /* Bounds check destination. */
1108 if (args
->offset
> obj
->base
.size
||
1109 args
->size
> obj
->base
.size
- args
->offset
) {
1114 /* prime objects have no backing filp to GEM pread/pwrite
1117 if (!obj
->base
.filp
) {
1122 trace_i915_gem_object_pwrite(obj
, args
->offset
, args
->size
);
1125 /* We can only do the GTT pwrite on untiled buffers, as otherwise
1126 * it would end up going through the fenced access, and we'll get
1127 * different detiling behavior between reading and writing.
1128 * pread/pwrite currently are reading and writing from the CPU
1129 * perspective, requiring manual detiling by the client.
1131 if (obj
->tiling_mode
== I915_TILING_NONE
&&
1132 obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
&&
1133 cpu_write_needs_clflush(obj
)) {
1134 ret
= i915_gem_gtt_pwrite_fast(dev
, obj
, args
, file
);
1135 /* Note that the gtt paths might fail with non-page-backed user
1136 * pointers (e.g. gtt mappings when moving data between
1137 * textures). Fallback to the shmem path in that case. */
1140 if (ret
== -EFAULT
|| ret
== -ENOSPC
) {
1141 if (obj
->phys_handle
)
1142 ret
= i915_gem_phys_pwrite(obj
, args
, file
);
1144 ret
= i915_gem_shmem_pwrite(dev
, obj
, args
, file
);
1148 drm_gem_object_unreference(&obj
->base
);
1150 mutex_unlock(&dev
->struct_mutex
);
1155 i915_gem_check_wedge(struct i915_gpu_error
*error
,
1158 if (i915_reset_in_progress(error
)) {
1159 /* Non-interruptible callers can't handle -EAGAIN, hence return
1160 * -EIO unconditionally for these. */
1164 /* Recovery complete, but the reset failed ... */
1165 if (i915_terminally_wedged(error
))
1169 * Check if GPU Reset is in progress - we need intel_ring_begin
1170 * to work properly to reinit the hw state while the gpu is
1171 * still marked as reset-in-progress. Handle this with a flag.
1173 if (!error
->reload_in_reset
)
1181 * Compare seqno against outstanding lazy request. Emit a request if they are
1185 i915_gem_check_olr(struct intel_engine_cs
*ring
, u32 seqno
)
1189 BUG_ON(!mutex_is_locked(&ring
->dev
->struct_mutex
));
1192 if (seqno
== ring
->outstanding_lazy_seqno
)
1193 ret
= i915_add_request(ring
, NULL
);
1198 static void fake_irq(unsigned long data
)
1200 wake_up_process((struct task_struct
*)data
);
1203 static bool missed_irq(struct drm_i915_private
*dev_priv
,
1204 struct intel_engine_cs
*ring
)
1206 return test_bit(ring
->id
, &dev_priv
->gpu_error
.missed_irq_rings
);
1209 static bool can_wait_boost(struct drm_i915_file_private
*file_priv
)
1211 if (file_priv
== NULL
)
1214 return !atomic_xchg(&file_priv
->rps_wait_boost
, true);
1218 * __i915_wait_seqno - wait until execution of seqno has finished
1219 * @ring: the ring expected to report seqno
1221 * @reset_counter: reset sequence associated with the given seqno
1222 * @interruptible: do an interruptible wait (normally yes)
1223 * @timeout: in - how long to wait (NULL forever); out - how much time remaining
1225 * Note: It is of utmost importance that the passed in seqno and reset_counter
1226 * values have been read by the caller in an smp safe manner. Where read-side
1227 * locks are involved, it is sufficient to read the reset_counter before
1228 * unlocking the lock that protects the seqno. For lockless tricks, the
1229 * reset_counter _must_ be read before, and an appropriate smp_rmb must be
1232 * Returns 0 if the seqno was found within the alloted time. Else returns the
1233 * errno with remaining time filled in timeout argument.
1235 int __i915_wait_seqno(struct intel_engine_cs
*ring
, u32 seqno
,
1236 unsigned reset_counter
,
1239 struct drm_i915_file_private
*file_priv
)
1241 struct drm_device
*dev
= ring
->dev
;
1242 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1243 const bool irq_test_in_progress
=
1244 ACCESS_ONCE(dev_priv
->gpu_error
.test_irq_rings
) & intel_ring_flag(ring
);
1246 unsigned long timeout_expire
;
1250 WARN(!intel_irqs_enabled(dev_priv
), "IRQs disabled");
1252 if (i915_seqno_passed(ring
->get_seqno(ring
, true), seqno
))
1255 timeout_expire
= timeout
? jiffies
+ nsecs_to_jiffies((u64
)*timeout
) : 0;
1257 if (INTEL_INFO(dev
)->gen
>= 6 && ring
->id
== RCS
&& can_wait_boost(file_priv
)) {
1258 gen6_rps_boost(dev_priv
);
1260 mod_delayed_work(dev_priv
->wq
,
1261 &file_priv
->mm
.idle_work
,
1262 msecs_to_jiffies(100));
1265 if (!irq_test_in_progress
&& WARN_ON(!ring
->irq_get(ring
)))
1268 /* Record current time in case interrupted by signal, or wedged */
1269 trace_i915_gem_request_wait_begin(ring
, seqno
);
1270 before
= ktime_get_raw_ns();
1272 struct timer_list timer
;
1274 prepare_to_wait(&ring
->irq_queue
, &wait
,
1275 interruptible
? TASK_INTERRUPTIBLE
: TASK_UNINTERRUPTIBLE
);
1277 /* We need to check whether any gpu reset happened in between
1278 * the caller grabbing the seqno and now ... */
1279 if (reset_counter
!= atomic_read(&dev_priv
->gpu_error
.reset_counter
)) {
1280 /* ... but upgrade the -EAGAIN to an -EIO if the gpu
1281 * is truely gone. */
1282 ret
= i915_gem_check_wedge(&dev_priv
->gpu_error
, interruptible
);
1288 if (i915_seqno_passed(ring
->get_seqno(ring
, false), seqno
)) {
1293 if (interruptible
&& signal_pending(current
)) {
1298 if (timeout
&& time_after_eq(jiffies
, timeout_expire
)) {
1303 timer
.function
= NULL
;
1304 if (timeout
|| missed_irq(dev_priv
, ring
)) {
1305 unsigned long expire
;
1307 setup_timer_on_stack(&timer
, fake_irq
, (unsigned long)current
);
1308 expire
= missed_irq(dev_priv
, ring
) ? jiffies
+ 1 : timeout_expire
;
1309 mod_timer(&timer
, expire
);
1314 if (timer
.function
) {
1315 del_singleshot_timer_sync(&timer
);
1316 destroy_timer_on_stack(&timer
);
1319 now
= ktime_get_raw_ns();
1320 trace_i915_gem_request_wait_end(ring
, seqno
);
1322 if (!irq_test_in_progress
)
1323 ring
->irq_put(ring
);
1325 finish_wait(&ring
->irq_queue
, &wait
);
1328 s64 tres
= *timeout
- (now
- before
);
1330 *timeout
= tres
< 0 ? 0 : tres
;
1337 * Waits for a sequence number to be signaled, and cleans up the
1338 * request and object lists appropriately for that event.
1341 i915_wait_seqno(struct intel_engine_cs
*ring
, uint32_t seqno
)
1343 struct drm_device
*dev
= ring
->dev
;
1344 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1345 bool interruptible
= dev_priv
->mm
.interruptible
;
1346 unsigned reset_counter
;
1349 BUG_ON(!mutex_is_locked(&dev
->struct_mutex
));
1352 ret
= i915_gem_check_wedge(&dev_priv
->gpu_error
, interruptible
);
1356 ret
= i915_gem_check_olr(ring
, seqno
);
1360 reset_counter
= atomic_read(&dev_priv
->gpu_error
.reset_counter
);
1361 return __i915_wait_seqno(ring
, seqno
, reset_counter
, interruptible
,
1366 i915_gem_object_wait_rendering__tail(struct drm_i915_gem_object
*obj
)
1371 /* Manually manage the write flush as we may have not yet
1372 * retired the buffer.
1374 * Note that the last_write_seqno is always the earlier of
1375 * the two (read/write) seqno, so if we haved successfully waited,
1376 * we know we have passed the last write.
1378 obj
->last_write_seqno
= 0;
1384 * Ensures that all rendering to the object has completed and the object is
1385 * safe to unbind from the GTT or access from the CPU.
1387 static __must_check
int
1388 i915_gem_object_wait_rendering(struct drm_i915_gem_object
*obj
,
1391 struct intel_engine_cs
*ring
= obj
->ring
;
1395 seqno
= readonly
? obj
->last_write_seqno
: obj
->last_read_seqno
;
1399 ret
= i915_wait_seqno(ring
, seqno
);
1403 return i915_gem_object_wait_rendering__tail(obj
);
1406 /* A nonblocking variant of the above wait. This is a highly dangerous routine
1407 * as the object state may change during this call.
1409 static __must_check
int
1410 i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object
*obj
,
1411 struct drm_i915_file_private
*file_priv
,
1414 struct drm_device
*dev
= obj
->base
.dev
;
1415 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1416 struct intel_engine_cs
*ring
= obj
->ring
;
1417 unsigned reset_counter
;
1421 BUG_ON(!mutex_is_locked(&dev
->struct_mutex
));
1422 BUG_ON(!dev_priv
->mm
.interruptible
);
1424 seqno
= readonly
? obj
->last_write_seqno
: obj
->last_read_seqno
;
1428 ret
= i915_gem_check_wedge(&dev_priv
->gpu_error
, true);
1432 ret
= i915_gem_check_olr(ring
, seqno
);
1436 reset_counter
= atomic_read(&dev_priv
->gpu_error
.reset_counter
);
1437 mutex_unlock(&dev
->struct_mutex
);
1438 ret
= __i915_wait_seqno(ring
, seqno
, reset_counter
, true, NULL
,
1440 mutex_lock(&dev
->struct_mutex
);
1444 return i915_gem_object_wait_rendering__tail(obj
);
1448 * Called when user space prepares to use an object with the CPU, either
1449 * through the mmap ioctl's mapping or a GTT mapping.
1452 i915_gem_set_domain_ioctl(struct drm_device
*dev
, void *data
,
1453 struct drm_file
*file
)
1455 struct drm_i915_gem_set_domain
*args
= data
;
1456 struct drm_i915_gem_object
*obj
;
1457 uint32_t read_domains
= args
->read_domains
;
1458 uint32_t write_domain
= args
->write_domain
;
1461 /* Only handle setting domains to types used by the CPU. */
1462 if (write_domain
& I915_GEM_GPU_DOMAINS
)
1465 if (read_domains
& I915_GEM_GPU_DOMAINS
)
1468 /* Having something in the write domain implies it's in the read
1469 * domain, and only that read domain. Enforce that in the request.
1471 if (write_domain
!= 0 && read_domains
!= write_domain
)
1474 ret
= i915_mutex_lock_interruptible(dev
);
1478 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1479 if (&obj
->base
== NULL
) {
1484 /* Try to flush the object off the GPU without holding the lock.
1485 * We will repeat the flush holding the lock in the normal manner
1486 * to catch cases where we are gazumped.
1488 ret
= i915_gem_object_wait_rendering__nonblocking(obj
,
1494 if (read_domains
& I915_GEM_DOMAIN_GTT
) {
1495 ret
= i915_gem_object_set_to_gtt_domain(obj
, write_domain
!= 0);
1497 /* Silently promote "you're not bound, there was nothing to do"
1498 * to success, since the client was just asking us to
1499 * make sure everything was done.
1504 ret
= i915_gem_object_set_to_cpu_domain(obj
, write_domain
!= 0);
1508 drm_gem_object_unreference(&obj
->base
);
1510 mutex_unlock(&dev
->struct_mutex
);
1515 * Called when user space has done writes to this buffer
1518 i915_gem_sw_finish_ioctl(struct drm_device
*dev
, void *data
,
1519 struct drm_file
*file
)
1521 struct drm_i915_gem_sw_finish
*args
= data
;
1522 struct drm_i915_gem_object
*obj
;
1525 ret
= i915_mutex_lock_interruptible(dev
);
1529 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1530 if (&obj
->base
== NULL
) {
1535 /* Pinned buffers may be scanout, so flush the cache */
1536 if (obj
->pin_display
)
1537 i915_gem_object_flush_cpu_write_domain(obj
, true);
1539 drm_gem_object_unreference(&obj
->base
);
1541 mutex_unlock(&dev
->struct_mutex
);
1546 * Maps the contents of an object, returning the address it is mapped
1549 * While the mapping holds a reference on the contents of the object, it doesn't
1550 * imply a ref on the object itself.
1554 * DRM driver writers who look a this function as an example for how to do GEM
1555 * mmap support, please don't implement mmap support like here. The modern way
1556 * to implement DRM mmap support is with an mmap offset ioctl (like
1557 * i915_gem_mmap_gtt) and then using the mmap syscall on the DRM fd directly.
1558 * That way debug tooling like valgrind will understand what's going on, hiding
1559 * the mmap call in a driver private ioctl will break that. The i915 driver only
1560 * does cpu mmaps this way because we didn't know better.
1563 i915_gem_mmap_ioctl(struct drm_device
*dev
, void *data
,
1564 struct drm_file
*file
)
1566 struct drm_i915_gem_mmap
*args
= data
;
1567 struct drm_gem_object
*obj
;
1570 obj
= drm_gem_object_lookup(dev
, file
, args
->handle
);
1574 /* prime objects have no backing filp to GEM mmap
1578 drm_gem_object_unreference_unlocked(obj
);
1582 addr
= vm_mmap(obj
->filp
, 0, args
->size
,
1583 PROT_READ
| PROT_WRITE
, MAP_SHARED
,
1585 drm_gem_object_unreference_unlocked(obj
);
1586 if (IS_ERR((void *)addr
))
1589 args
->addr_ptr
= (uint64_t) addr
;
1595 * i915_gem_fault - fault a page into the GTT
1596 * vma: VMA in question
1599 * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped
1600 * from userspace. The fault handler takes care of binding the object to
1601 * the GTT (if needed), allocating and programming a fence register (again,
1602 * only if needed based on whether the old reg is still valid or the object
1603 * is tiled) and inserting a new PTE into the faulting process.
1605 * Note that the faulting process may involve evicting existing objects
1606 * from the GTT and/or fence registers to make room. So performance may
1607 * suffer if the GTT working set is large or there are few fence registers
1610 int i915_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
1612 struct drm_i915_gem_object
*obj
= to_intel_bo(vma
->vm_private_data
);
1613 struct drm_device
*dev
= obj
->base
.dev
;
1614 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1615 pgoff_t page_offset
;
1618 bool write
= !!(vmf
->flags
& FAULT_FLAG_WRITE
);
1620 intel_runtime_pm_get(dev_priv
);
1622 /* We don't use vmf->pgoff since that has the fake offset */
1623 page_offset
= ((unsigned long)vmf
->virtual_address
- vma
->vm_start
) >>
1626 ret
= i915_mutex_lock_interruptible(dev
);
1630 trace_i915_gem_object_fault(obj
, page_offset
, true, write
);
1632 /* Try to flush the object off the GPU first without holding the lock.
1633 * Upon reacquiring the lock, we will perform our sanity checks and then
1634 * repeat the flush holding the lock in the normal manner to catch cases
1635 * where we are gazumped.
1637 ret
= i915_gem_object_wait_rendering__nonblocking(obj
, NULL
, !write
);
1641 /* Access to snoopable pages through the GTT is incoherent. */
1642 if (obj
->cache_level
!= I915_CACHE_NONE
&& !HAS_LLC(dev
)) {
1647 /* Now bind it into the GTT if needed */
1648 ret
= i915_gem_obj_ggtt_pin(obj
, 0, PIN_MAPPABLE
);
1652 ret
= i915_gem_object_set_to_gtt_domain(obj
, write
);
1656 ret
= i915_gem_object_get_fence(obj
);
1660 /* Finally, remap it using the new GTT offset */
1661 pfn
= dev_priv
->gtt
.mappable_base
+ i915_gem_obj_ggtt_offset(obj
);
1664 if (!obj
->fault_mappable
) {
1665 unsigned long size
= min_t(unsigned long,
1666 vma
->vm_end
- vma
->vm_start
,
1670 for (i
= 0; i
< size
>> PAGE_SHIFT
; i
++) {
1671 ret
= vm_insert_pfn(vma
,
1672 (unsigned long)vma
->vm_start
+ i
* PAGE_SIZE
,
1678 obj
->fault_mappable
= true;
1680 ret
= vm_insert_pfn(vma
,
1681 (unsigned long)vmf
->virtual_address
,
1684 i915_gem_object_ggtt_unpin(obj
);
1686 mutex_unlock(&dev
->struct_mutex
);
1691 * We eat errors when the gpu is terminally wedged to avoid
1692 * userspace unduly crashing (gl has no provisions for mmaps to
1693 * fail). But any other -EIO isn't ours (e.g. swap in failure)
1694 * and so needs to be reported.
1696 if (!i915_terminally_wedged(&dev_priv
->gpu_error
)) {
1697 ret
= VM_FAULT_SIGBUS
;
1702 * EAGAIN means the gpu is hung and we'll wait for the error
1703 * handler to reset everything when re-faulting in
1704 * i915_mutex_lock_interruptible.
1711 * EBUSY is ok: this just means that another thread
1712 * already did the job.
1714 ret
= VM_FAULT_NOPAGE
;
1721 ret
= VM_FAULT_SIGBUS
;
1724 WARN_ONCE(ret
, "unhandled error in i915_gem_fault: %i\n", ret
);
1725 ret
= VM_FAULT_SIGBUS
;
1729 intel_runtime_pm_put(dev_priv
);
1734 * i915_gem_release_mmap - remove physical page mappings
1735 * @obj: obj in question
1737 * Preserve the reservation of the mmapping with the DRM core code, but
1738 * relinquish ownership of the pages back to the system.
1740 * It is vital that we remove the page mapping if we have mapped a tiled
1741 * object through the GTT and then lose the fence register due to
1742 * resource pressure. Similarly if the object has been moved out of the
1743 * aperture, than pages mapped into userspace must be revoked. Removing the
1744 * mapping will then trigger a page fault on the next user access, allowing
1745 * fixup by i915_gem_fault().
1748 i915_gem_release_mmap(struct drm_i915_gem_object
*obj
)
1750 if (!obj
->fault_mappable
)
1753 drm_vma_node_unmap(&obj
->base
.vma_node
,
1754 obj
->base
.dev
->anon_inode
->i_mapping
);
1755 obj
->fault_mappable
= false;
1759 i915_gem_release_all_mmaps(struct drm_i915_private
*dev_priv
)
1761 struct drm_i915_gem_object
*obj
;
1763 list_for_each_entry(obj
, &dev_priv
->mm
.bound_list
, global_list
)
1764 i915_gem_release_mmap(obj
);
1768 i915_gem_get_gtt_size(struct drm_device
*dev
, uint32_t size
, int tiling_mode
)
1772 if (INTEL_INFO(dev
)->gen
>= 4 ||
1773 tiling_mode
== I915_TILING_NONE
)
1776 /* Previous chips need a power-of-two fence region when tiling */
1777 if (INTEL_INFO(dev
)->gen
== 3)
1778 gtt_size
= 1024*1024;
1780 gtt_size
= 512*1024;
1782 while (gtt_size
< size
)
1789 * i915_gem_get_gtt_alignment - return required GTT alignment for an object
1790 * @obj: object to check
1792 * Return the required GTT alignment for an object, taking into account
1793 * potential fence register mapping.
1796 i915_gem_get_gtt_alignment(struct drm_device
*dev
, uint32_t size
,
1797 int tiling_mode
, bool fenced
)
1800 * Minimum alignment is 4k (GTT page size), but might be greater
1801 * if a fence register is needed for the object.
1803 if (INTEL_INFO(dev
)->gen
>= 4 || (!fenced
&& IS_G33(dev
)) ||
1804 tiling_mode
== I915_TILING_NONE
)
1808 * Previous chips need to be aligned to the size of the smallest
1809 * fence register that can contain the object.
1811 return i915_gem_get_gtt_size(dev
, size
, tiling_mode
);
1814 static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object
*obj
)
1816 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
1819 if (drm_vma_node_has_offset(&obj
->base
.vma_node
))
1822 dev_priv
->mm
.shrinker_no_lock_stealing
= true;
1824 ret
= drm_gem_create_mmap_offset(&obj
->base
);
1828 /* Badly fragmented mmap space? The only way we can recover
1829 * space is by destroying unwanted objects. We can't randomly release
1830 * mmap_offsets as userspace expects them to be persistent for the
1831 * lifetime of the objects. The closest we can is to release the
1832 * offsets on purgeable objects by truncating it and marking it purged,
1833 * which prevents userspace from ever using that object again.
1835 i915_gem_shrink(dev_priv
,
1836 obj
->base
.size
>> PAGE_SHIFT
,
1838 I915_SHRINK_UNBOUND
|
1839 I915_SHRINK_PURGEABLE
);
1840 ret
= drm_gem_create_mmap_offset(&obj
->base
);
1844 i915_gem_shrink_all(dev_priv
);
1845 ret
= drm_gem_create_mmap_offset(&obj
->base
);
1847 dev_priv
->mm
.shrinker_no_lock_stealing
= false;
1852 static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object
*obj
)
1854 drm_gem_free_mmap_offset(&obj
->base
);
1858 i915_gem_mmap_gtt(struct drm_file
*file
,
1859 struct drm_device
*dev
,
1863 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1864 struct drm_i915_gem_object
*obj
;
1867 ret
= i915_mutex_lock_interruptible(dev
);
1871 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, handle
));
1872 if (&obj
->base
== NULL
) {
1877 if (obj
->base
.size
> dev_priv
->gtt
.mappable_end
) {
1882 if (obj
->madv
!= I915_MADV_WILLNEED
) {
1883 DRM_DEBUG("Attempting to mmap a purgeable buffer\n");
1888 ret
= i915_gem_object_create_mmap_offset(obj
);
1892 *offset
= drm_vma_node_offset_addr(&obj
->base
.vma_node
);
1895 drm_gem_object_unreference(&obj
->base
);
1897 mutex_unlock(&dev
->struct_mutex
);
1902 * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing
1904 * @data: GTT mapping ioctl data
1905 * @file: GEM object info
1907 * Simply returns the fake offset to userspace so it can mmap it.
1908 * The mmap call will end up in drm_gem_mmap(), which will set things
1909 * up so we can get faults in the handler above.
1911 * The fault handler will take care of binding the object into the GTT
1912 * (since it may have been evicted to make room for something), allocating
1913 * a fence register, and mapping the appropriate aperture address into
1917 i915_gem_mmap_gtt_ioctl(struct drm_device
*dev
, void *data
,
1918 struct drm_file
*file
)
1920 struct drm_i915_gem_mmap_gtt
*args
= data
;
1922 return i915_gem_mmap_gtt(file
, dev
, args
->handle
, &args
->offset
);
1926 i915_gem_object_is_purgeable(struct drm_i915_gem_object
*obj
)
1928 return obj
->madv
== I915_MADV_DONTNEED
;
1931 /* Immediately discard the backing storage */
1933 i915_gem_object_truncate(struct drm_i915_gem_object
*obj
)
1935 i915_gem_object_free_mmap_offset(obj
);
1937 if (obj
->base
.filp
== NULL
)
1940 /* Our goal here is to return as much of the memory as
1941 * is possible back to the system as we are called from OOM.
1942 * To do this we must instruct the shmfs to drop all of its
1943 * backing pages, *now*.
1945 shmem_truncate_range(file_inode(obj
->base
.filp
), 0, (loff_t
)-1);
1946 obj
->madv
= __I915_MADV_PURGED
;
1949 /* Try to discard unwanted pages */
1951 i915_gem_object_invalidate(struct drm_i915_gem_object
*obj
)
1953 struct address_space
*mapping
;
1955 switch (obj
->madv
) {
1956 case I915_MADV_DONTNEED
:
1957 i915_gem_object_truncate(obj
);
1958 case __I915_MADV_PURGED
:
1962 if (obj
->base
.filp
== NULL
)
1965 mapping
= file_inode(obj
->base
.filp
)->i_mapping
,
1966 invalidate_mapping_pages(mapping
, 0, (loff_t
)-1);
1970 i915_gem_object_put_pages_gtt(struct drm_i915_gem_object
*obj
)
1972 struct sg_page_iter sg_iter
;
1975 BUG_ON(obj
->madv
== __I915_MADV_PURGED
);
1977 ret
= i915_gem_object_set_to_cpu_domain(obj
, true);
1979 /* In the event of a disaster, abandon all caches and
1980 * hope for the best.
1982 WARN_ON(ret
!= -EIO
);
1983 i915_gem_clflush_object(obj
, true);
1984 obj
->base
.read_domains
= obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
1987 if (i915_gem_object_needs_bit17_swizzle(obj
))
1988 i915_gem_object_save_bit_17_swizzle(obj
);
1990 if (obj
->madv
== I915_MADV_DONTNEED
)
1993 for_each_sg_page(obj
->pages
->sgl
, &sg_iter
, obj
->pages
->nents
, 0) {
1994 struct page
*page
= sg_page_iter_page(&sg_iter
);
1997 set_page_dirty(page
);
1999 if (obj
->madv
== I915_MADV_WILLNEED
)
2000 mark_page_accessed(page
);
2002 page_cache_release(page
);
2006 sg_free_table(obj
->pages
);
2011 i915_gem_object_put_pages(struct drm_i915_gem_object
*obj
)
2013 const struct drm_i915_gem_object_ops
*ops
= obj
->ops
;
2015 if (obj
->pages
== NULL
)
2018 if (obj
->pages_pin_count
)
2021 BUG_ON(i915_gem_obj_bound_any(obj
));
2023 /* ->put_pages might need to allocate memory for the bit17 swizzle
2024 * array, hence protect them from being reaped by removing them from gtt
2026 list_del(&obj
->global_list
);
2028 ops
->put_pages(obj
);
2031 i915_gem_object_invalidate(obj
);
2037 i915_gem_shrink(struct drm_i915_private
*dev_priv
,
2038 long target
, unsigned flags
)
2041 struct list_head
*list
;
2044 { &dev_priv
->mm
.unbound_list
, I915_SHRINK_UNBOUND
},
2045 { &dev_priv
->mm
.bound_list
, I915_SHRINK_BOUND
},
2048 unsigned long count
= 0;
2051 * As we may completely rewrite the (un)bound list whilst unbinding
2052 * (due to retiring requests) we have to strictly process only
2053 * one element of the list at the time, and recheck the list
2054 * on every iteration.
2056 * In particular, we must hold a reference whilst removing the
2057 * object as we may end up waiting for and/or retiring the objects.
2058 * This might release the final reference (held by the active list)
2059 * and result in the object being freed from under us. This is
2060 * similar to the precautions the eviction code must take whilst
2063 * Also note that although these lists do not hold a reference to
2064 * the object we can safely grab one here: The final object
2065 * unreferencing and the bound_list are both protected by the
2066 * dev->struct_mutex and so we won't ever be able to observe an
2067 * object on the bound_list with a reference count equals 0.
2069 for (phase
= phases
; phase
->list
; phase
++) {
2070 struct list_head still_in_list
;
2072 if ((flags
& phase
->bit
) == 0)
2075 INIT_LIST_HEAD(&still_in_list
);
2076 while (count
< target
&& !list_empty(phase
->list
)) {
2077 struct drm_i915_gem_object
*obj
;
2078 struct i915_vma
*vma
, *v
;
2080 obj
= list_first_entry(phase
->list
,
2081 typeof(*obj
), global_list
);
2082 list_move_tail(&obj
->global_list
, &still_in_list
);
2084 if (flags
& I915_SHRINK_PURGEABLE
&&
2085 !i915_gem_object_is_purgeable(obj
))
2088 drm_gem_object_reference(&obj
->base
);
2090 /* For the unbound phase, this should be a no-op! */
2091 list_for_each_entry_safe(vma
, v
,
2092 &obj
->vma_list
, vma_link
)
2093 if (i915_vma_unbind(vma
))
2096 if (i915_gem_object_put_pages(obj
) == 0)
2097 count
+= obj
->base
.size
>> PAGE_SHIFT
;
2099 drm_gem_object_unreference(&obj
->base
);
2101 list_splice(&still_in_list
, phase
->list
);
2107 static unsigned long
2108 i915_gem_shrink_all(struct drm_i915_private
*dev_priv
)
2110 i915_gem_evict_everything(dev_priv
->dev
);
2111 return i915_gem_shrink(dev_priv
, LONG_MAX
,
2112 I915_SHRINK_BOUND
| I915_SHRINK_UNBOUND
);
2116 i915_gem_object_get_pages_gtt(struct drm_i915_gem_object
*obj
)
2118 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2120 struct address_space
*mapping
;
2121 struct sg_table
*st
;
2122 struct scatterlist
*sg
;
2123 struct sg_page_iter sg_iter
;
2125 unsigned long last_pfn
= 0; /* suppress gcc warning */
2128 /* Assert that the object is not currently in any GPU domain. As it
2129 * wasn't in the GTT, there shouldn't be any way it could have been in
2132 BUG_ON(obj
->base
.read_domains
& I915_GEM_GPU_DOMAINS
);
2133 BUG_ON(obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
);
2135 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
2139 page_count
= obj
->base
.size
/ PAGE_SIZE
;
2140 if (sg_alloc_table(st
, page_count
, GFP_KERNEL
)) {
2145 /* Get the list of pages out of our struct file. They'll be pinned
2146 * at this point until we release them.
2148 * Fail silently without starting the shrinker
2150 mapping
= file_inode(obj
->base
.filp
)->i_mapping
;
2151 gfp
= mapping_gfp_mask(mapping
);
2152 gfp
|= __GFP_NORETRY
| __GFP_NOWARN
| __GFP_NO_KSWAPD
;
2153 gfp
&= ~(__GFP_IO
| __GFP_WAIT
);
2156 for (i
= 0; i
< page_count
; i
++) {
2157 page
= shmem_read_mapping_page_gfp(mapping
, i
, gfp
);
2159 i915_gem_shrink(dev_priv
,
2162 I915_SHRINK_UNBOUND
|
2163 I915_SHRINK_PURGEABLE
);
2164 page
= shmem_read_mapping_page_gfp(mapping
, i
, gfp
);
2167 /* We've tried hard to allocate the memory by reaping
2168 * our own buffer, now let the real VM do its job and
2169 * go down in flames if truly OOM.
2171 i915_gem_shrink_all(dev_priv
);
2172 page
= shmem_read_mapping_page(mapping
, i
);
2176 #ifdef CONFIG_SWIOTLB
2177 if (swiotlb_nr_tbl()) {
2179 sg_set_page(sg
, page
, PAGE_SIZE
, 0);
2184 if (!i
|| page_to_pfn(page
) != last_pfn
+ 1) {
2188 sg_set_page(sg
, page
, PAGE_SIZE
, 0);
2190 sg
->length
+= PAGE_SIZE
;
2192 last_pfn
= page_to_pfn(page
);
2194 /* Check that the i965g/gm workaround works. */
2195 WARN_ON((gfp
& __GFP_DMA32
) && (last_pfn
>= 0x00100000UL
));
2197 #ifdef CONFIG_SWIOTLB
2198 if (!swiotlb_nr_tbl())
2203 if (i915_gem_object_needs_bit17_swizzle(obj
))
2204 i915_gem_object_do_bit_17_swizzle(obj
);
2210 for_each_sg_page(st
->sgl
, &sg_iter
, st
->nents
, 0)
2211 page_cache_release(sg_page_iter_page(&sg_iter
));
2215 /* shmemfs first checks if there is enough memory to allocate the page
2216 * and reports ENOSPC should there be insufficient, along with the usual
2217 * ENOMEM for a genuine allocation failure.
2219 * We use ENOSPC in our driver to mean that we have run out of aperture
2220 * space and so want to translate the error from shmemfs back to our
2221 * usual understanding of ENOMEM.
2223 if (PTR_ERR(page
) == -ENOSPC
)
2226 return PTR_ERR(page
);
2229 /* Ensure that the associated pages are gathered from the backing storage
2230 * and pinned into our object. i915_gem_object_get_pages() may be called
2231 * multiple times before they are released by a single call to
2232 * i915_gem_object_put_pages() - once the pages are no longer referenced
2233 * either as a result of memory pressure (reaping pages under the shrinker)
2234 * or as the object is itself released.
2237 i915_gem_object_get_pages(struct drm_i915_gem_object
*obj
)
2239 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2240 const struct drm_i915_gem_object_ops
*ops
= obj
->ops
;
2246 if (obj
->madv
!= I915_MADV_WILLNEED
) {
2247 DRM_DEBUG("Attempting to obtain a purgeable object\n");
2251 BUG_ON(obj
->pages_pin_count
);
2253 ret
= ops
->get_pages(obj
);
2257 list_add_tail(&obj
->global_list
, &dev_priv
->mm
.unbound_list
);
2262 i915_gem_object_move_to_active(struct drm_i915_gem_object
*obj
,
2263 struct intel_engine_cs
*ring
)
2265 u32 seqno
= intel_ring_get_seqno(ring
);
2267 BUG_ON(ring
== NULL
);
2268 if (obj
->ring
!= ring
&& obj
->last_write_seqno
) {
2269 /* Keep the seqno relative to the current ring */
2270 obj
->last_write_seqno
= seqno
;
2274 /* Add a reference if we're newly entering the active list. */
2276 drm_gem_object_reference(&obj
->base
);
2280 list_move_tail(&obj
->ring_list
, &ring
->active_list
);
2282 obj
->last_read_seqno
= seqno
;
2285 void i915_vma_move_to_active(struct i915_vma
*vma
,
2286 struct intel_engine_cs
*ring
)
2288 list_move_tail(&vma
->mm_list
, &vma
->vm
->active_list
);
2289 return i915_gem_object_move_to_active(vma
->obj
, ring
);
2293 i915_gem_object_move_to_inactive(struct drm_i915_gem_object
*obj
)
2295 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2296 struct i915_address_space
*vm
;
2297 struct i915_vma
*vma
;
2299 BUG_ON(obj
->base
.write_domain
& ~I915_GEM_GPU_DOMAINS
);
2300 BUG_ON(!obj
->active
);
2302 list_for_each_entry(vm
, &dev_priv
->vm_list
, global_link
) {
2303 vma
= i915_gem_obj_to_vma(obj
, vm
);
2304 if (vma
&& !list_empty(&vma
->mm_list
))
2305 list_move_tail(&vma
->mm_list
, &vm
->inactive_list
);
2308 intel_fb_obj_flush(obj
, true);
2310 list_del_init(&obj
->ring_list
);
2313 obj
->last_read_seqno
= 0;
2314 obj
->last_write_seqno
= 0;
2315 obj
->base
.write_domain
= 0;
2317 obj
->last_fenced_seqno
= 0;
2320 drm_gem_object_unreference(&obj
->base
);
2322 WARN_ON(i915_verify_lists(dev
));
2326 i915_gem_object_retire(struct drm_i915_gem_object
*obj
)
2328 struct intel_engine_cs
*ring
= obj
->ring
;
2333 if (i915_seqno_passed(ring
->get_seqno(ring
, true),
2334 obj
->last_read_seqno
))
2335 i915_gem_object_move_to_inactive(obj
);
2339 i915_gem_init_seqno(struct drm_device
*dev
, u32 seqno
)
2341 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2342 struct intel_engine_cs
*ring
;
2345 /* Carefully retire all requests without writing to the rings */
2346 for_each_ring(ring
, dev_priv
, i
) {
2347 ret
= intel_ring_idle(ring
);
2351 i915_gem_retire_requests(dev
);
2353 /* Finally reset hw state */
2354 for_each_ring(ring
, dev_priv
, i
) {
2355 intel_ring_init_seqno(ring
, seqno
);
2357 for (j
= 0; j
< ARRAY_SIZE(ring
->semaphore
.sync_seqno
); j
++)
2358 ring
->semaphore
.sync_seqno
[j
] = 0;
2364 int i915_gem_set_seqno(struct drm_device
*dev
, u32 seqno
)
2366 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2372 /* HWS page needs to be set less than what we
2373 * will inject to ring
2375 ret
= i915_gem_init_seqno(dev
, seqno
- 1);
2379 /* Carefully set the last_seqno value so that wrap
2380 * detection still works
2382 dev_priv
->next_seqno
= seqno
;
2383 dev_priv
->last_seqno
= seqno
- 1;
2384 if (dev_priv
->last_seqno
== 0)
2385 dev_priv
->last_seqno
--;
2391 i915_gem_get_seqno(struct drm_device
*dev
, u32
*seqno
)
2393 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2395 /* reserve 0 for non-seqno */
2396 if (dev_priv
->next_seqno
== 0) {
2397 int ret
= i915_gem_init_seqno(dev
, 0);
2401 dev_priv
->next_seqno
= 1;
2404 *seqno
= dev_priv
->last_seqno
= dev_priv
->next_seqno
++;
2408 int __i915_add_request(struct intel_engine_cs
*ring
,
2409 struct drm_file
*file
,
2410 struct drm_i915_gem_object
*obj
,
2413 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
2414 struct drm_i915_gem_request
*request
;
2415 struct intel_ringbuffer
*ringbuf
;
2416 u32 request_ring_position
, request_start
;
2419 request
= ring
->preallocated_lazy_request
;
2420 if (WARN_ON(request
== NULL
))
2423 if (i915
.enable_execlists
) {
2424 struct intel_context
*ctx
= request
->ctx
;
2425 ringbuf
= ctx
->engine
[ring
->id
].ringbuf
;
2427 ringbuf
= ring
->buffer
;
2429 request_start
= intel_ring_get_tail(ringbuf
);
2431 * Emit any outstanding flushes - execbuf can fail to emit the flush
2432 * after having emitted the batchbuffer command. Hence we need to fix
2433 * things up similar to emitting the lazy request. The difference here
2434 * is that the flush _must_ happen before the next request, no matter
2437 if (i915
.enable_execlists
) {
2438 ret
= logical_ring_flush_all_caches(ringbuf
);
2442 ret
= intel_ring_flush_all_caches(ring
);
2447 /* Record the position of the start of the request so that
2448 * should we detect the updated seqno part-way through the
2449 * GPU processing the request, we never over-estimate the
2450 * position of the head.
2452 request_ring_position
= intel_ring_get_tail(ringbuf
);
2454 if (i915
.enable_execlists
) {
2455 ret
= ring
->emit_request(ringbuf
);
2459 ret
= ring
->add_request(ring
);
2464 request
->seqno
= intel_ring_get_seqno(ring
);
2465 request
->ring
= ring
;
2466 request
->head
= request_start
;
2467 request
->tail
= request_ring_position
;
2469 /* Whilst this request exists, batch_obj will be on the
2470 * active_list, and so will hold the active reference. Only when this
2471 * request is retired will the the batch_obj be moved onto the
2472 * inactive_list and lose its active reference. Hence we do not need
2473 * to explicitly hold another reference here.
2475 request
->batch_obj
= obj
;
2477 if (!i915
.enable_execlists
) {
2478 /* Hold a reference to the current context so that we can inspect
2479 * it later in case a hangcheck error event fires.
2481 request
->ctx
= ring
->last_context
;
2483 i915_gem_context_reference(request
->ctx
);
2486 request
->emitted_jiffies
= jiffies
;
2487 list_add_tail(&request
->list
, &ring
->request_list
);
2488 request
->file_priv
= NULL
;
2491 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
2493 spin_lock(&file_priv
->mm
.lock
);
2494 request
->file_priv
= file_priv
;
2495 list_add_tail(&request
->client_list
,
2496 &file_priv
->mm
.request_list
);
2497 spin_unlock(&file_priv
->mm
.lock
);
2500 trace_i915_gem_request_add(ring
, request
->seqno
);
2501 ring
->outstanding_lazy_seqno
= 0;
2502 ring
->preallocated_lazy_request
= NULL
;
2504 if (!dev_priv
->ums
.mm_suspended
) {
2505 i915_queue_hangcheck(ring
->dev
);
2507 cancel_delayed_work_sync(&dev_priv
->mm
.idle_work
);
2508 queue_delayed_work(dev_priv
->wq
,
2509 &dev_priv
->mm
.retire_work
,
2510 round_jiffies_up_relative(HZ
));
2511 intel_mark_busy(dev_priv
->dev
);
2515 *out_seqno
= request
->seqno
;
2520 i915_gem_request_remove_from_client(struct drm_i915_gem_request
*request
)
2522 struct drm_i915_file_private
*file_priv
= request
->file_priv
;
2527 spin_lock(&file_priv
->mm
.lock
);
2528 list_del(&request
->client_list
);
2529 request
->file_priv
= NULL
;
2530 spin_unlock(&file_priv
->mm
.lock
);
2533 static bool i915_context_is_banned(struct drm_i915_private
*dev_priv
,
2534 const struct intel_context
*ctx
)
2536 unsigned long elapsed
;
2538 elapsed
= get_seconds() - ctx
->hang_stats
.guilty_ts
;
2540 if (ctx
->hang_stats
.banned
)
2543 if (elapsed
<= DRM_I915_CTX_BAN_PERIOD
) {
2544 if (!i915_gem_context_is_default(ctx
)) {
2545 DRM_DEBUG("context hanging too fast, banning!\n");
2547 } else if (i915_stop_ring_allow_ban(dev_priv
)) {
2548 if (i915_stop_ring_allow_warn(dev_priv
))
2549 DRM_ERROR("gpu hanging too fast, banning!\n");
2557 static void i915_set_reset_status(struct drm_i915_private
*dev_priv
,
2558 struct intel_context
*ctx
,
2561 struct i915_ctx_hang_stats
*hs
;
2566 hs
= &ctx
->hang_stats
;
2569 hs
->banned
= i915_context_is_banned(dev_priv
, ctx
);
2571 hs
->guilty_ts
= get_seconds();
2573 hs
->batch_pending
++;
2577 static void i915_gem_free_request(struct drm_i915_gem_request
*request
)
2579 list_del(&request
->list
);
2580 i915_gem_request_remove_from_client(request
);
2583 i915_gem_context_unreference(request
->ctx
);
2588 struct drm_i915_gem_request
*
2589 i915_gem_find_active_request(struct intel_engine_cs
*ring
)
2591 struct drm_i915_gem_request
*request
;
2592 u32 completed_seqno
;
2594 completed_seqno
= ring
->get_seqno(ring
, false);
2596 list_for_each_entry(request
, &ring
->request_list
, list
) {
2597 if (i915_seqno_passed(completed_seqno
, request
->seqno
))
2606 static void i915_gem_reset_ring_status(struct drm_i915_private
*dev_priv
,
2607 struct intel_engine_cs
*ring
)
2609 struct drm_i915_gem_request
*request
;
2612 request
= i915_gem_find_active_request(ring
);
2614 if (request
== NULL
)
2617 ring_hung
= ring
->hangcheck
.score
>= HANGCHECK_SCORE_RING_HUNG
;
2619 i915_set_reset_status(dev_priv
, request
->ctx
, ring_hung
);
2621 list_for_each_entry_continue(request
, &ring
->request_list
, list
)
2622 i915_set_reset_status(dev_priv
, request
->ctx
, false);
2625 static void i915_gem_reset_ring_cleanup(struct drm_i915_private
*dev_priv
,
2626 struct intel_engine_cs
*ring
)
2628 while (!list_empty(&ring
->active_list
)) {
2629 struct drm_i915_gem_object
*obj
;
2631 obj
= list_first_entry(&ring
->active_list
,
2632 struct drm_i915_gem_object
,
2635 i915_gem_object_move_to_inactive(obj
);
2639 * We must free the requests after all the corresponding objects have
2640 * been moved off active lists. Which is the same order as the normal
2641 * retire_requests function does. This is important if object hold
2642 * implicit references on things like e.g. ppgtt address spaces through
2645 while (!list_empty(&ring
->request_list
)) {
2646 struct drm_i915_gem_request
*request
;
2648 request
= list_first_entry(&ring
->request_list
,
2649 struct drm_i915_gem_request
,
2652 i915_gem_free_request(request
);
2655 while (!list_empty(&ring
->execlist_queue
)) {
2656 struct intel_ctx_submit_request
*submit_req
;
2658 submit_req
= list_first_entry(&ring
->execlist_queue
,
2659 struct intel_ctx_submit_request
,
2661 list_del(&submit_req
->execlist_link
);
2662 intel_runtime_pm_put(dev_priv
);
2663 i915_gem_context_unreference(submit_req
->ctx
);
2667 /* These may not have been flush before the reset, do so now */
2668 kfree(ring
->preallocated_lazy_request
);
2669 ring
->preallocated_lazy_request
= NULL
;
2670 ring
->outstanding_lazy_seqno
= 0;
2673 void i915_gem_restore_fences(struct drm_device
*dev
)
2675 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2678 for (i
= 0; i
< dev_priv
->num_fence_regs
; i
++) {
2679 struct drm_i915_fence_reg
*reg
= &dev_priv
->fence_regs
[i
];
2682 * Commit delayed tiling changes if we have an object still
2683 * attached to the fence, otherwise just clear the fence.
2686 i915_gem_object_update_fence(reg
->obj
, reg
,
2687 reg
->obj
->tiling_mode
);
2689 i915_gem_write_fence(dev
, i
, NULL
);
2694 void i915_gem_reset(struct drm_device
*dev
)
2696 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2697 struct intel_engine_cs
*ring
;
2701 * Before we free the objects from the requests, we need to inspect
2702 * them for finding the guilty party. As the requests only borrow
2703 * their reference to the objects, the inspection must be done first.
2705 for_each_ring(ring
, dev_priv
, i
)
2706 i915_gem_reset_ring_status(dev_priv
, ring
);
2708 for_each_ring(ring
, dev_priv
, i
)
2709 i915_gem_reset_ring_cleanup(dev_priv
, ring
);
2711 i915_gem_context_reset(dev
);
2713 i915_gem_restore_fences(dev
);
2717 * This function clears the request list as sequence numbers are passed.
2720 i915_gem_retire_requests_ring(struct intel_engine_cs
*ring
)
2724 if (list_empty(&ring
->request_list
))
2727 WARN_ON(i915_verify_lists(ring
->dev
));
2729 seqno
= ring
->get_seqno(ring
, true);
2731 /* Move any buffers on the active list that are no longer referenced
2732 * by the ringbuffer to the flushing/inactive lists as appropriate,
2733 * before we free the context associated with the requests.
2735 while (!list_empty(&ring
->active_list
)) {
2736 struct drm_i915_gem_object
*obj
;
2738 obj
= list_first_entry(&ring
->active_list
,
2739 struct drm_i915_gem_object
,
2742 if (!i915_seqno_passed(seqno
, obj
->last_read_seqno
))
2745 i915_gem_object_move_to_inactive(obj
);
2749 while (!list_empty(&ring
->request_list
)) {
2750 struct drm_i915_gem_request
*request
;
2751 struct intel_ringbuffer
*ringbuf
;
2753 request
= list_first_entry(&ring
->request_list
,
2754 struct drm_i915_gem_request
,
2757 if (!i915_seqno_passed(seqno
, request
->seqno
))
2760 trace_i915_gem_request_retire(ring
, request
->seqno
);
2762 /* This is one of the few common intersection points
2763 * between legacy ringbuffer submission and execlists:
2764 * we need to tell them apart in order to find the correct
2765 * ringbuffer to which the request belongs to.
2767 if (i915
.enable_execlists
) {
2768 struct intel_context
*ctx
= request
->ctx
;
2769 ringbuf
= ctx
->engine
[ring
->id
].ringbuf
;
2771 ringbuf
= ring
->buffer
;
2773 /* We know the GPU must have read the request to have
2774 * sent us the seqno + interrupt, so use the position
2775 * of tail of the request to update the last known position
2778 ringbuf
->last_retired_head
= request
->tail
;
2780 i915_gem_free_request(request
);
2783 if (unlikely(ring
->trace_irq_seqno
&&
2784 i915_seqno_passed(seqno
, ring
->trace_irq_seqno
))) {
2785 ring
->irq_put(ring
);
2786 ring
->trace_irq_seqno
= 0;
2789 WARN_ON(i915_verify_lists(ring
->dev
));
2793 i915_gem_retire_requests(struct drm_device
*dev
)
2795 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2796 struct intel_engine_cs
*ring
;
2800 for_each_ring(ring
, dev_priv
, i
) {
2801 i915_gem_retire_requests_ring(ring
);
2802 idle
&= list_empty(&ring
->request_list
);
2806 mod_delayed_work(dev_priv
->wq
,
2807 &dev_priv
->mm
.idle_work
,
2808 msecs_to_jiffies(100));
2814 i915_gem_retire_work_handler(struct work_struct
*work
)
2816 struct drm_i915_private
*dev_priv
=
2817 container_of(work
, typeof(*dev_priv
), mm
.retire_work
.work
);
2818 struct drm_device
*dev
= dev_priv
->dev
;
2821 /* Come back later if the device is busy... */
2823 if (mutex_trylock(&dev
->struct_mutex
)) {
2824 idle
= i915_gem_retire_requests(dev
);
2825 mutex_unlock(&dev
->struct_mutex
);
2828 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
,
2829 round_jiffies_up_relative(HZ
));
2833 i915_gem_idle_work_handler(struct work_struct
*work
)
2835 struct drm_i915_private
*dev_priv
=
2836 container_of(work
, typeof(*dev_priv
), mm
.idle_work
.work
);
2838 intel_mark_idle(dev_priv
->dev
);
2842 * Ensures that an object will eventually get non-busy by flushing any required
2843 * write domains, emitting any outstanding lazy request and retiring and
2844 * completed requests.
2847 i915_gem_object_flush_active(struct drm_i915_gem_object
*obj
)
2852 ret
= i915_gem_check_olr(obj
->ring
, obj
->last_read_seqno
);
2856 i915_gem_retire_requests_ring(obj
->ring
);
2863 * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT
2864 * @DRM_IOCTL_ARGS: standard ioctl arguments
2866 * Returns 0 if successful, else an error is returned with the remaining time in
2867 * the timeout parameter.
2868 * -ETIME: object is still busy after timeout
2869 * -ERESTARTSYS: signal interrupted the wait
2870 * -ENONENT: object doesn't exist
2871 * Also possible, but rare:
2872 * -EAGAIN: GPU wedged
2874 * -ENODEV: Internal IRQ fail
2875 * -E?: The add request failed
2877 * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any
2878 * non-zero timeout parameter the wait ioctl will wait for the given number of
2879 * nanoseconds on an object becoming unbusy. Since the wait itself does so
2880 * without holding struct_mutex the object may become re-busied before this
2881 * function completes. A similar but shorter * race condition exists in the busy
2885 i915_gem_wait_ioctl(struct drm_device
*dev
, void *data
, struct drm_file
*file
)
2887 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2888 struct drm_i915_gem_wait
*args
= data
;
2889 struct drm_i915_gem_object
*obj
;
2890 struct intel_engine_cs
*ring
= NULL
;
2891 unsigned reset_counter
;
2895 if (args
->flags
!= 0)
2898 ret
= i915_mutex_lock_interruptible(dev
);
2902 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->bo_handle
));
2903 if (&obj
->base
== NULL
) {
2904 mutex_unlock(&dev
->struct_mutex
);
2908 /* Need to make sure the object gets inactive eventually. */
2909 ret
= i915_gem_object_flush_active(obj
);
2914 seqno
= obj
->last_read_seqno
;
2921 /* Do this after OLR check to make sure we make forward progress polling
2922 * on this IOCTL with a timeout <=0 (like busy ioctl)
2924 if (args
->timeout_ns
<= 0) {
2929 drm_gem_object_unreference(&obj
->base
);
2930 reset_counter
= atomic_read(&dev_priv
->gpu_error
.reset_counter
);
2931 mutex_unlock(&dev
->struct_mutex
);
2933 return __i915_wait_seqno(ring
, seqno
, reset_counter
, true,
2934 &args
->timeout_ns
, file
->driver_priv
);
2937 drm_gem_object_unreference(&obj
->base
);
2938 mutex_unlock(&dev
->struct_mutex
);
2943 * i915_gem_object_sync - sync an object to a ring.
2945 * @obj: object which may be in use on another ring.
2946 * @to: ring we wish to use the object on. May be NULL.
2948 * This code is meant to abstract object synchronization with the GPU.
2949 * Calling with NULL implies synchronizing the object with the CPU
2950 * rather than a particular GPU ring.
2952 * Returns 0 if successful, else propagates up the lower layer error.
2955 i915_gem_object_sync(struct drm_i915_gem_object
*obj
,
2956 struct intel_engine_cs
*to
)
2958 struct intel_engine_cs
*from
= obj
->ring
;
2962 if (from
== NULL
|| to
== from
)
2965 if (to
== NULL
|| !i915_semaphore_is_enabled(obj
->base
.dev
))
2966 return i915_gem_object_wait_rendering(obj
, false);
2968 idx
= intel_ring_sync_index(from
, to
);
2970 seqno
= obj
->last_read_seqno
;
2971 /* Optimization: Avoid semaphore sync when we are sure we already
2972 * waited for an object with higher seqno */
2973 if (seqno
<= from
->semaphore
.sync_seqno
[idx
])
2976 ret
= i915_gem_check_olr(obj
->ring
, seqno
);
2980 trace_i915_gem_ring_sync_to(from
, to
, seqno
);
2981 ret
= to
->semaphore
.sync_to(to
, from
, seqno
);
2983 /* We use last_read_seqno because sync_to()
2984 * might have just caused seqno wrap under
2987 from
->semaphore
.sync_seqno
[idx
] = obj
->last_read_seqno
;
2992 static void i915_gem_object_finish_gtt(struct drm_i915_gem_object
*obj
)
2994 u32 old_write_domain
, old_read_domains
;
2996 /* Force a pagefault for domain tracking on next user access */
2997 i915_gem_release_mmap(obj
);
2999 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
) == 0)
3002 /* Wait for any direct GTT access to complete */
3005 old_read_domains
= obj
->base
.read_domains
;
3006 old_write_domain
= obj
->base
.write_domain
;
3008 obj
->base
.read_domains
&= ~I915_GEM_DOMAIN_GTT
;
3009 obj
->base
.write_domain
&= ~I915_GEM_DOMAIN_GTT
;
3011 trace_i915_gem_object_change_domain(obj
,
3016 int i915_vma_unbind(struct i915_vma
*vma
)
3018 struct drm_i915_gem_object
*obj
= vma
->obj
;
3019 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
3022 if (list_empty(&vma
->vma_link
))
3025 if (!drm_mm_node_allocated(&vma
->node
)) {
3026 i915_gem_vma_destroy(vma
);
3033 BUG_ON(obj
->pages
== NULL
);
3035 ret
= i915_gem_object_finish_gpu(obj
);
3038 /* Continue on if we fail due to EIO, the GPU is hung so we
3039 * should be safe and we need to cleanup or else we might
3040 * cause memory corruption through use-after-free.
3043 /* Throw away the active reference before moving to the unbound list */
3044 i915_gem_object_retire(obj
);
3046 if (i915_is_ggtt(vma
->vm
)) {
3047 i915_gem_object_finish_gtt(obj
);
3049 /* release the fence reg _after_ flushing */
3050 ret
= i915_gem_object_put_fence(obj
);
3055 trace_i915_vma_unbind(vma
);
3057 vma
->unbind_vma(vma
);
3059 list_del_init(&vma
->mm_list
);
3060 if (i915_is_ggtt(vma
->vm
))
3061 obj
->map_and_fenceable
= false;
3063 drm_mm_remove_node(&vma
->node
);
3064 i915_gem_vma_destroy(vma
);
3066 /* Since the unbound list is global, only move to that list if
3067 * no more VMAs exist. */
3068 if (list_empty(&obj
->vma_list
)) {
3069 i915_gem_gtt_finish_object(obj
);
3070 list_move_tail(&obj
->global_list
, &dev_priv
->mm
.unbound_list
);
3073 /* And finally now the object is completely decoupled from this vma,
3074 * we can drop its hold on the backing storage and allow it to be
3075 * reaped by the shrinker.
3077 i915_gem_object_unpin_pages(obj
);
3082 int i915_gpu_idle(struct drm_device
*dev
)
3084 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3085 struct intel_engine_cs
*ring
;
3088 /* Flush everything onto the inactive list. */
3089 for_each_ring(ring
, dev_priv
, i
) {
3090 if (!i915
.enable_execlists
) {
3091 ret
= i915_switch_context(ring
, ring
->default_context
);
3096 ret
= intel_ring_idle(ring
);
3104 static void i965_write_fence_reg(struct drm_device
*dev
, int reg
,
3105 struct drm_i915_gem_object
*obj
)
3107 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3109 int fence_pitch_shift
;
3111 if (INTEL_INFO(dev
)->gen
>= 6) {
3112 fence_reg
= FENCE_REG_SANDYBRIDGE_0
;
3113 fence_pitch_shift
= SANDYBRIDGE_FENCE_PITCH_SHIFT
;
3115 fence_reg
= FENCE_REG_965_0
;
3116 fence_pitch_shift
= I965_FENCE_PITCH_SHIFT
;
3119 fence_reg
+= reg
* 8;
3121 /* To w/a incoherency with non-atomic 64-bit register updates,
3122 * we split the 64-bit update into two 32-bit writes. In order
3123 * for a partial fence not to be evaluated between writes, we
3124 * precede the update with write to turn off the fence register,
3125 * and only enable the fence as the last step.
3127 * For extra levels of paranoia, we make sure each step lands
3128 * before applying the next step.
3130 I915_WRITE(fence_reg
, 0);
3131 POSTING_READ(fence_reg
);
3134 u32 size
= i915_gem_obj_ggtt_size(obj
);
3137 val
= (uint64_t)((i915_gem_obj_ggtt_offset(obj
) + size
- 4096) &
3139 val
|= i915_gem_obj_ggtt_offset(obj
) & 0xfffff000;
3140 val
|= (uint64_t)((obj
->stride
/ 128) - 1) << fence_pitch_shift
;
3141 if (obj
->tiling_mode
== I915_TILING_Y
)
3142 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
3143 val
|= I965_FENCE_REG_VALID
;
3145 I915_WRITE(fence_reg
+ 4, val
>> 32);
3146 POSTING_READ(fence_reg
+ 4);
3148 I915_WRITE(fence_reg
+ 0, val
);
3149 POSTING_READ(fence_reg
);
3151 I915_WRITE(fence_reg
+ 4, 0);
3152 POSTING_READ(fence_reg
+ 4);
3156 static void i915_write_fence_reg(struct drm_device
*dev
, int reg
,
3157 struct drm_i915_gem_object
*obj
)
3159 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3163 u32 size
= i915_gem_obj_ggtt_size(obj
);
3167 WARN((i915_gem_obj_ggtt_offset(obj
) & ~I915_FENCE_START_MASK
) ||
3168 (size
& -size
) != size
||
3169 (i915_gem_obj_ggtt_offset(obj
) & (size
- 1)),
3170 "object 0x%08lx [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
3171 i915_gem_obj_ggtt_offset(obj
), obj
->map_and_fenceable
, size
);
3173 if (obj
->tiling_mode
== I915_TILING_Y
&& HAS_128_BYTE_Y_TILING(dev
))
3178 /* Note: pitch better be a power of two tile widths */
3179 pitch_val
= obj
->stride
/ tile_width
;
3180 pitch_val
= ffs(pitch_val
) - 1;
3182 val
= i915_gem_obj_ggtt_offset(obj
);
3183 if (obj
->tiling_mode
== I915_TILING_Y
)
3184 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
3185 val
|= I915_FENCE_SIZE_BITS(size
);
3186 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
3187 val
|= I830_FENCE_REG_VALID
;
3192 reg
= FENCE_REG_830_0
+ reg
* 4;
3194 reg
= FENCE_REG_945_8
+ (reg
- 8) * 4;
3196 I915_WRITE(reg
, val
);
3200 static void i830_write_fence_reg(struct drm_device
*dev
, int reg
,
3201 struct drm_i915_gem_object
*obj
)
3203 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3207 u32 size
= i915_gem_obj_ggtt_size(obj
);
3210 WARN((i915_gem_obj_ggtt_offset(obj
) & ~I830_FENCE_START_MASK
) ||
3211 (size
& -size
) != size
||
3212 (i915_gem_obj_ggtt_offset(obj
) & (size
- 1)),
3213 "object 0x%08lx not 512K or pot-size 0x%08x aligned\n",
3214 i915_gem_obj_ggtt_offset(obj
), size
);
3216 pitch_val
= obj
->stride
/ 128;
3217 pitch_val
= ffs(pitch_val
) - 1;
3219 val
= i915_gem_obj_ggtt_offset(obj
);
3220 if (obj
->tiling_mode
== I915_TILING_Y
)
3221 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
3222 val
|= I830_FENCE_SIZE_BITS(size
);
3223 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
3224 val
|= I830_FENCE_REG_VALID
;
3228 I915_WRITE(FENCE_REG_830_0
+ reg
* 4, val
);
3229 POSTING_READ(FENCE_REG_830_0
+ reg
* 4);
3232 inline static bool i915_gem_object_needs_mb(struct drm_i915_gem_object
*obj
)
3234 return obj
&& obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
;
3237 static void i915_gem_write_fence(struct drm_device
*dev
, int reg
,
3238 struct drm_i915_gem_object
*obj
)
3240 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3242 /* Ensure that all CPU reads are completed before installing a fence
3243 * and all writes before removing the fence.
3245 if (i915_gem_object_needs_mb(dev_priv
->fence_regs
[reg
].obj
))
3248 WARN(obj
&& (!obj
->stride
|| !obj
->tiling_mode
),
3249 "bogus fence setup with stride: 0x%x, tiling mode: %i\n",
3250 obj
->stride
, obj
->tiling_mode
);
3252 switch (INTEL_INFO(dev
)->gen
) {
3258 case 4: i965_write_fence_reg(dev
, reg
, obj
); break;
3259 case 3: i915_write_fence_reg(dev
, reg
, obj
); break;
3260 case 2: i830_write_fence_reg(dev
, reg
, obj
); break;
3264 /* And similarly be paranoid that no direct access to this region
3265 * is reordered to before the fence is installed.
3267 if (i915_gem_object_needs_mb(obj
))
3271 static inline int fence_number(struct drm_i915_private
*dev_priv
,
3272 struct drm_i915_fence_reg
*fence
)
3274 return fence
- dev_priv
->fence_regs
;
3277 static void i915_gem_object_update_fence(struct drm_i915_gem_object
*obj
,
3278 struct drm_i915_fence_reg
*fence
,
3281 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
3282 int reg
= fence_number(dev_priv
, fence
);
3284 i915_gem_write_fence(obj
->base
.dev
, reg
, enable
? obj
: NULL
);
3287 obj
->fence_reg
= reg
;
3289 list_move_tail(&fence
->lru_list
, &dev_priv
->mm
.fence_list
);
3291 obj
->fence_reg
= I915_FENCE_REG_NONE
;
3293 list_del_init(&fence
->lru_list
);
3295 obj
->fence_dirty
= false;
3299 i915_gem_object_wait_fence(struct drm_i915_gem_object
*obj
)
3301 if (obj
->last_fenced_seqno
) {
3302 int ret
= i915_wait_seqno(obj
->ring
, obj
->last_fenced_seqno
);
3306 obj
->last_fenced_seqno
= 0;
3313 i915_gem_object_put_fence(struct drm_i915_gem_object
*obj
)
3315 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
3316 struct drm_i915_fence_reg
*fence
;
3319 ret
= i915_gem_object_wait_fence(obj
);
3323 if (obj
->fence_reg
== I915_FENCE_REG_NONE
)
3326 fence
= &dev_priv
->fence_regs
[obj
->fence_reg
];
3328 if (WARN_ON(fence
->pin_count
))
3331 i915_gem_object_fence_lost(obj
);
3332 i915_gem_object_update_fence(obj
, fence
, false);
3337 static struct drm_i915_fence_reg
*
3338 i915_find_fence_reg(struct drm_device
*dev
)
3340 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3341 struct drm_i915_fence_reg
*reg
, *avail
;
3344 /* First try to find a free reg */
3346 for (i
= dev_priv
->fence_reg_start
; i
< dev_priv
->num_fence_regs
; i
++) {
3347 reg
= &dev_priv
->fence_regs
[i
];
3351 if (!reg
->pin_count
)
3358 /* None available, try to steal one or wait for a user to finish */
3359 list_for_each_entry(reg
, &dev_priv
->mm
.fence_list
, lru_list
) {
3367 /* Wait for completion of pending flips which consume fences */
3368 if (intel_has_pending_fb_unpin(dev
))
3369 return ERR_PTR(-EAGAIN
);
3371 return ERR_PTR(-EDEADLK
);
3375 * i915_gem_object_get_fence - set up fencing for an object
3376 * @obj: object to map through a fence reg
3378 * When mapping objects through the GTT, userspace wants to be able to write
3379 * to them without having to worry about swizzling if the object is tiled.
3380 * This function walks the fence regs looking for a free one for @obj,
3381 * stealing one if it can't find any.
3383 * It then sets up the reg based on the object's properties: address, pitch
3384 * and tiling format.
3386 * For an untiled surface, this removes any existing fence.
3389 i915_gem_object_get_fence(struct drm_i915_gem_object
*obj
)
3391 struct drm_device
*dev
= obj
->base
.dev
;
3392 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3393 bool enable
= obj
->tiling_mode
!= I915_TILING_NONE
;
3394 struct drm_i915_fence_reg
*reg
;
3397 /* Have we updated the tiling parameters upon the object and so
3398 * will need to serialise the write to the associated fence register?
3400 if (obj
->fence_dirty
) {
3401 ret
= i915_gem_object_wait_fence(obj
);
3406 /* Just update our place in the LRU if our fence is getting reused. */
3407 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
3408 reg
= &dev_priv
->fence_regs
[obj
->fence_reg
];
3409 if (!obj
->fence_dirty
) {
3410 list_move_tail(®
->lru_list
,
3411 &dev_priv
->mm
.fence_list
);
3414 } else if (enable
) {
3415 if (WARN_ON(!obj
->map_and_fenceable
))
3418 reg
= i915_find_fence_reg(dev
);
3420 return PTR_ERR(reg
);
3423 struct drm_i915_gem_object
*old
= reg
->obj
;
3425 ret
= i915_gem_object_wait_fence(old
);
3429 i915_gem_object_fence_lost(old
);
3434 i915_gem_object_update_fence(obj
, reg
, enable
);
3439 static bool i915_gem_valid_gtt_space(struct i915_vma
*vma
,
3440 unsigned long cache_level
)
3442 struct drm_mm_node
*gtt_space
= &vma
->node
;
3443 struct drm_mm_node
*other
;
3446 * On some machines we have to be careful when putting differing types
3447 * of snoopable memory together to avoid the prefetcher crossing memory
3448 * domains and dying. During vm initialisation, we decide whether or not
3449 * these constraints apply and set the drm_mm.color_adjust
3452 if (vma
->vm
->mm
.color_adjust
== NULL
)
3455 if (!drm_mm_node_allocated(gtt_space
))
3458 if (list_empty(>t_space
->node_list
))
3461 other
= list_entry(gtt_space
->node_list
.prev
, struct drm_mm_node
, node_list
);
3462 if (other
->allocated
&& !other
->hole_follows
&& other
->color
!= cache_level
)
3465 other
= list_entry(gtt_space
->node_list
.next
, struct drm_mm_node
, node_list
);
3466 if (other
->allocated
&& !gtt_space
->hole_follows
&& other
->color
!= cache_level
)
3473 * Finds free space in the GTT aperture and binds the object there.
3475 static struct i915_vma
*
3476 i915_gem_object_bind_to_vm(struct drm_i915_gem_object
*obj
,
3477 struct i915_address_space
*vm
,
3481 struct drm_device
*dev
= obj
->base
.dev
;
3482 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3483 u32 size
, fence_size
, fence_alignment
, unfenced_alignment
;
3484 unsigned long start
=
3485 flags
& PIN_OFFSET_BIAS
? flags
& PIN_OFFSET_MASK
: 0;
3487 flags
& PIN_MAPPABLE
? dev_priv
->gtt
.mappable_end
: vm
->total
;
3488 struct i915_vma
*vma
;
3491 fence_size
= i915_gem_get_gtt_size(dev
,
3494 fence_alignment
= i915_gem_get_gtt_alignment(dev
,
3496 obj
->tiling_mode
, true);
3497 unfenced_alignment
=
3498 i915_gem_get_gtt_alignment(dev
,
3500 obj
->tiling_mode
, false);
3503 alignment
= flags
& PIN_MAPPABLE
? fence_alignment
:
3505 if (flags
& PIN_MAPPABLE
&& alignment
& (fence_alignment
- 1)) {
3506 DRM_DEBUG("Invalid object alignment requested %u\n", alignment
);
3507 return ERR_PTR(-EINVAL
);
3510 size
= flags
& PIN_MAPPABLE
? fence_size
: obj
->base
.size
;
3512 /* If the object is bigger than the entire aperture, reject it early
3513 * before evicting everything in a vain attempt to find space.
3515 if (obj
->base
.size
> end
) {
3516 DRM_DEBUG("Attempting to bind an object larger than the aperture: object=%zd > %s aperture=%lu\n",
3518 flags
& PIN_MAPPABLE
? "mappable" : "total",
3520 return ERR_PTR(-E2BIG
);
3523 ret
= i915_gem_object_get_pages(obj
);
3525 return ERR_PTR(ret
);
3527 i915_gem_object_pin_pages(obj
);
3529 vma
= i915_gem_obj_lookup_or_create_vma(obj
, vm
);
3534 ret
= drm_mm_insert_node_in_range_generic(&vm
->mm
, &vma
->node
,
3538 DRM_MM_SEARCH_DEFAULT
,
3539 DRM_MM_CREATE_DEFAULT
);
3541 ret
= i915_gem_evict_something(dev
, vm
, size
, alignment
,
3550 if (WARN_ON(!i915_gem_valid_gtt_space(vma
, obj
->cache_level
))) {
3552 goto err_remove_node
;
3555 ret
= i915_gem_gtt_prepare_object(obj
);
3557 goto err_remove_node
;
3559 list_move_tail(&obj
->global_list
, &dev_priv
->mm
.bound_list
);
3560 list_add_tail(&vma
->mm_list
, &vm
->inactive_list
);
3562 trace_i915_vma_bind(vma
, flags
);
3563 vma
->bind_vma(vma
, obj
->cache_level
,
3564 flags
& PIN_GLOBAL
? GLOBAL_BIND
: 0);
3569 drm_mm_remove_node(&vma
->node
);
3571 i915_gem_vma_destroy(vma
);
3574 i915_gem_object_unpin_pages(obj
);
3579 i915_gem_clflush_object(struct drm_i915_gem_object
*obj
,
3582 /* If we don't have a page list set up, then we're not pinned
3583 * to GPU, and we can ignore the cache flush because it'll happen
3584 * again at bind time.
3586 if (obj
->pages
== NULL
)
3590 * Stolen memory is always coherent with the GPU as it is explicitly
3591 * marked as wc by the system, or the system is cache-coherent.
3593 if (obj
->stolen
|| obj
->phys_handle
)
3596 /* If the GPU is snooping the contents of the CPU cache,
3597 * we do not need to manually clear the CPU cache lines. However,
3598 * the caches are only snooped when the render cache is
3599 * flushed/invalidated. As we always have to emit invalidations
3600 * and flushes when moving into and out of the RENDER domain, correct
3601 * snooping behaviour occurs naturally as the result of our domain
3604 if (!force
&& cpu_cache_is_coherent(obj
->base
.dev
, obj
->cache_level
))
3607 trace_i915_gem_object_clflush(obj
);
3608 drm_clflush_sg(obj
->pages
);
3613 /** Flushes the GTT write domain for the object if it's dirty. */
3615 i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
)
3617 uint32_t old_write_domain
;
3619 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_GTT
)
3622 /* No actual flushing is required for the GTT write domain. Writes
3623 * to it immediately go to main memory as far as we know, so there's
3624 * no chipset flush. It also doesn't land in render cache.
3626 * However, we do have to enforce the order so that all writes through
3627 * the GTT land before any writes to the device, such as updates to
3632 old_write_domain
= obj
->base
.write_domain
;
3633 obj
->base
.write_domain
= 0;
3635 intel_fb_obj_flush(obj
, false);
3637 trace_i915_gem_object_change_domain(obj
,
3638 obj
->base
.read_domains
,
3642 /** Flushes the CPU write domain for the object if it's dirty. */
3644 i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
,
3647 uint32_t old_write_domain
;
3649 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
)
3652 if (i915_gem_clflush_object(obj
, force
))
3653 i915_gem_chipset_flush(obj
->base
.dev
);
3655 old_write_domain
= obj
->base
.write_domain
;
3656 obj
->base
.write_domain
= 0;
3658 intel_fb_obj_flush(obj
, false);
3660 trace_i915_gem_object_change_domain(obj
,
3661 obj
->base
.read_domains
,
3666 * Moves a single object to the GTT read, and possibly write domain.
3668 * This function returns when the move is complete, including waiting on
3672 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object
*obj
, bool write
)
3674 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
3675 struct i915_vma
*vma
= i915_gem_obj_to_ggtt(obj
);
3676 uint32_t old_write_domain
, old_read_domains
;
3679 /* Not valid to be called on unbound objects. */
3683 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_GTT
)
3686 ret
= i915_gem_object_wait_rendering(obj
, !write
);
3690 i915_gem_object_retire(obj
);
3691 i915_gem_object_flush_cpu_write_domain(obj
, false);
3693 /* Serialise direct access to this object with the barriers for
3694 * coherent writes from the GPU, by effectively invalidating the
3695 * GTT domain upon first access.
3697 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
) == 0)
3700 old_write_domain
= obj
->base
.write_domain
;
3701 old_read_domains
= obj
->base
.read_domains
;
3703 /* It should now be out of any other write domains, and we can update
3704 * the domain values for our changes.
3706 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_GTT
) != 0);
3707 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
3709 obj
->base
.read_domains
= I915_GEM_DOMAIN_GTT
;
3710 obj
->base
.write_domain
= I915_GEM_DOMAIN_GTT
;
3715 intel_fb_obj_invalidate(obj
, NULL
);
3717 trace_i915_gem_object_change_domain(obj
,
3721 /* And bump the LRU for this access */
3722 if (i915_gem_object_is_inactive(obj
))
3723 list_move_tail(&vma
->mm_list
,
3724 &dev_priv
->gtt
.base
.inactive_list
);
3729 int i915_gem_object_set_cache_level(struct drm_i915_gem_object
*obj
,
3730 enum i915_cache_level cache_level
)
3732 struct drm_device
*dev
= obj
->base
.dev
;
3733 struct i915_vma
*vma
, *next
;
3736 if (obj
->cache_level
== cache_level
)
3739 if (i915_gem_obj_is_pinned(obj
)) {
3740 DRM_DEBUG("can not change the cache level of pinned objects\n");
3744 list_for_each_entry_safe(vma
, next
, &obj
->vma_list
, vma_link
) {
3745 if (!i915_gem_valid_gtt_space(vma
, cache_level
)) {
3746 ret
= i915_vma_unbind(vma
);
3752 if (i915_gem_obj_bound_any(obj
)) {
3753 ret
= i915_gem_object_finish_gpu(obj
);
3757 i915_gem_object_finish_gtt(obj
);
3759 /* Before SandyBridge, you could not use tiling or fence
3760 * registers with snooped memory, so relinquish any fences
3761 * currently pointing to our region in the aperture.
3763 if (INTEL_INFO(dev
)->gen
< 6) {
3764 ret
= i915_gem_object_put_fence(obj
);
3769 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
)
3770 if (drm_mm_node_allocated(&vma
->node
))
3771 vma
->bind_vma(vma
, cache_level
,
3772 vma
->bound
& GLOBAL_BIND
);
3775 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
)
3776 vma
->node
.color
= cache_level
;
3777 obj
->cache_level
= cache_level
;
3779 if (cpu_write_needs_clflush(obj
)) {
3780 u32 old_read_domains
, old_write_domain
;
3782 /* If we're coming from LLC cached, then we haven't
3783 * actually been tracking whether the data is in the
3784 * CPU cache or not, since we only allow one bit set
3785 * in obj->write_domain and have been skipping the clflushes.
3786 * Just set it to the CPU cache for now.
3788 i915_gem_object_retire(obj
);
3789 WARN_ON(obj
->base
.write_domain
& ~I915_GEM_DOMAIN_CPU
);
3791 old_read_domains
= obj
->base
.read_domains
;
3792 old_write_domain
= obj
->base
.write_domain
;
3794 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3795 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3797 trace_i915_gem_object_change_domain(obj
,
3805 int i915_gem_get_caching_ioctl(struct drm_device
*dev
, void *data
,
3806 struct drm_file
*file
)
3808 struct drm_i915_gem_caching
*args
= data
;
3809 struct drm_i915_gem_object
*obj
;
3812 ret
= i915_mutex_lock_interruptible(dev
);
3816 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3817 if (&obj
->base
== NULL
) {
3822 switch (obj
->cache_level
) {
3823 case I915_CACHE_LLC
:
3824 case I915_CACHE_L3_LLC
:
3825 args
->caching
= I915_CACHING_CACHED
;
3829 args
->caching
= I915_CACHING_DISPLAY
;
3833 args
->caching
= I915_CACHING_NONE
;
3837 drm_gem_object_unreference(&obj
->base
);
3839 mutex_unlock(&dev
->struct_mutex
);
3843 int i915_gem_set_caching_ioctl(struct drm_device
*dev
, void *data
,
3844 struct drm_file
*file
)
3846 struct drm_i915_gem_caching
*args
= data
;
3847 struct drm_i915_gem_object
*obj
;
3848 enum i915_cache_level level
;
3851 switch (args
->caching
) {
3852 case I915_CACHING_NONE
:
3853 level
= I915_CACHE_NONE
;
3855 case I915_CACHING_CACHED
:
3856 level
= I915_CACHE_LLC
;
3858 case I915_CACHING_DISPLAY
:
3859 level
= HAS_WT(dev
) ? I915_CACHE_WT
: I915_CACHE_NONE
;
3865 ret
= i915_mutex_lock_interruptible(dev
);
3869 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3870 if (&obj
->base
== NULL
) {
3875 ret
= i915_gem_object_set_cache_level(obj
, level
);
3877 drm_gem_object_unreference(&obj
->base
);
3879 mutex_unlock(&dev
->struct_mutex
);
3883 static bool is_pin_display(struct drm_i915_gem_object
*obj
)
3885 struct i915_vma
*vma
;
3887 vma
= i915_gem_obj_to_ggtt(obj
);
3891 /* There are 3 sources that pin objects:
3892 * 1. The display engine (scanouts, sprites, cursors);
3893 * 2. Reservations for execbuffer;
3896 * We can ignore reservations as we hold the struct_mutex and
3897 * are only called outside of the reservation path. The user
3898 * can only increment pin_count once, and so if after
3899 * subtracting the potential reference by the user, any pin_count
3900 * remains, it must be due to another use by the display engine.
3902 return vma
->pin_count
- !!obj
->user_pin_count
;
3906 * Prepare buffer for display plane (scanout, cursors, etc).
3907 * Can be called from an uninterruptible phase (modesetting) and allows
3908 * any flushes to be pipelined (for pageflips).
3911 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object
*obj
,
3913 struct intel_engine_cs
*pipelined
)
3915 u32 old_read_domains
, old_write_domain
;
3916 bool was_pin_display
;
3919 if (pipelined
!= obj
->ring
) {
3920 ret
= i915_gem_object_sync(obj
, pipelined
);
3925 /* Mark the pin_display early so that we account for the
3926 * display coherency whilst setting up the cache domains.
3928 was_pin_display
= obj
->pin_display
;
3929 obj
->pin_display
= true;
3931 /* The display engine is not coherent with the LLC cache on gen6. As
3932 * a result, we make sure that the pinning that is about to occur is
3933 * done with uncached PTEs. This is lowest common denominator for all
3936 * However for gen6+, we could do better by using the GFDT bit instead
3937 * of uncaching, which would allow us to flush all the LLC-cached data
3938 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
3940 ret
= i915_gem_object_set_cache_level(obj
,
3941 HAS_WT(obj
->base
.dev
) ? I915_CACHE_WT
: I915_CACHE_NONE
);
3943 goto err_unpin_display
;
3945 /* As the user may map the buffer once pinned in the display plane
3946 * (e.g. libkms for the bootup splash), we have to ensure that we
3947 * always use map_and_fenceable for all scanout buffers.
3949 ret
= i915_gem_obj_ggtt_pin(obj
, alignment
, PIN_MAPPABLE
);
3951 goto err_unpin_display
;
3953 i915_gem_object_flush_cpu_write_domain(obj
, true);
3955 old_write_domain
= obj
->base
.write_domain
;
3956 old_read_domains
= obj
->base
.read_domains
;
3958 /* It should now be out of any other write domains, and we can update
3959 * the domain values for our changes.
3961 obj
->base
.write_domain
= 0;
3962 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
3964 trace_i915_gem_object_change_domain(obj
,
3971 WARN_ON(was_pin_display
!= is_pin_display(obj
));
3972 obj
->pin_display
= was_pin_display
;
3977 i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object
*obj
)
3979 i915_gem_object_ggtt_unpin(obj
);
3980 obj
->pin_display
= is_pin_display(obj
);
3984 i915_gem_object_finish_gpu(struct drm_i915_gem_object
*obj
)
3988 if ((obj
->base
.read_domains
& I915_GEM_GPU_DOMAINS
) == 0)
3991 ret
= i915_gem_object_wait_rendering(obj
, false);
3995 /* Ensure that we invalidate the GPU's caches and TLBs. */
3996 obj
->base
.read_domains
&= ~I915_GEM_GPU_DOMAINS
;
4001 * Moves a single object to the CPU read, and possibly write domain.
4003 * This function returns when the move is complete, including waiting on
4007 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object
*obj
, bool write
)
4009 uint32_t old_write_domain
, old_read_domains
;
4012 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_CPU
)
4015 ret
= i915_gem_object_wait_rendering(obj
, !write
);
4019 i915_gem_object_retire(obj
);
4020 i915_gem_object_flush_gtt_write_domain(obj
);
4022 old_write_domain
= obj
->base
.write_domain
;
4023 old_read_domains
= obj
->base
.read_domains
;
4025 /* Flush the CPU cache if it's still invalid. */
4026 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
) == 0) {
4027 i915_gem_clflush_object(obj
, false);
4029 obj
->base
.read_domains
|= I915_GEM_DOMAIN_CPU
;
4032 /* It should now be out of any other write domains, and we can update
4033 * the domain values for our changes.
4035 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_CPU
) != 0);
4037 /* If we're writing through the CPU, then the GPU read domains will
4038 * need to be invalidated at next use.
4041 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
4042 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
4046 intel_fb_obj_invalidate(obj
, NULL
);
4048 trace_i915_gem_object_change_domain(obj
,
4055 /* Throttle our rendering by waiting until the ring has completed our requests
4056 * emitted over 20 msec ago.
4058 * Note that if we were to use the current jiffies each time around the loop,
4059 * we wouldn't escape the function with any frames outstanding if the time to
4060 * render a frame was over 20ms.
4062 * This should get us reasonable parallelism between CPU and GPU but also
4063 * relatively low latency when blocking on a particular request to finish.
4066 i915_gem_ring_throttle(struct drm_device
*dev
, struct drm_file
*file
)
4068 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4069 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
4070 unsigned long recent_enough
= jiffies
- msecs_to_jiffies(20);
4071 struct drm_i915_gem_request
*request
;
4072 struct intel_engine_cs
*ring
= NULL
;
4073 unsigned reset_counter
;
4077 ret
= i915_gem_wait_for_error(&dev_priv
->gpu_error
);
4081 ret
= i915_gem_check_wedge(&dev_priv
->gpu_error
, false);
4085 spin_lock(&file_priv
->mm
.lock
);
4086 list_for_each_entry(request
, &file_priv
->mm
.request_list
, client_list
) {
4087 if (time_after_eq(request
->emitted_jiffies
, recent_enough
))
4090 ring
= request
->ring
;
4091 seqno
= request
->seqno
;
4093 reset_counter
= atomic_read(&dev_priv
->gpu_error
.reset_counter
);
4094 spin_unlock(&file_priv
->mm
.lock
);
4099 ret
= __i915_wait_seqno(ring
, seqno
, reset_counter
, true, NULL
, NULL
);
4101 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, 0);
4107 i915_vma_misplaced(struct i915_vma
*vma
, uint32_t alignment
, uint64_t flags
)
4109 struct drm_i915_gem_object
*obj
= vma
->obj
;
4112 vma
->node
.start
& (alignment
- 1))
4115 if (flags
& PIN_MAPPABLE
&& !obj
->map_and_fenceable
)
4118 if (flags
& PIN_OFFSET_BIAS
&&
4119 vma
->node
.start
< (flags
& PIN_OFFSET_MASK
))
4126 i915_gem_object_pin(struct drm_i915_gem_object
*obj
,
4127 struct i915_address_space
*vm
,
4131 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
4132 struct i915_vma
*vma
;
4136 if (WARN_ON(vm
== &dev_priv
->mm
.aliasing_ppgtt
->base
))
4139 if (WARN_ON(flags
& (PIN_GLOBAL
| PIN_MAPPABLE
) && !i915_is_ggtt(vm
)))
4142 if (WARN_ON((flags
& (PIN_MAPPABLE
| PIN_GLOBAL
)) == PIN_MAPPABLE
))
4145 vma
= i915_gem_obj_to_vma(obj
, vm
);
4147 if (WARN_ON(vma
->pin_count
== DRM_I915_GEM_OBJECT_MAX_PIN_COUNT
))
4150 if (i915_vma_misplaced(vma
, alignment
, flags
)) {
4151 WARN(vma
->pin_count
,
4152 "bo is already pinned with incorrect alignment:"
4153 " offset=%lx, req.alignment=%x, req.map_and_fenceable=%d,"
4154 " obj->map_and_fenceable=%d\n",
4155 i915_gem_obj_offset(obj
, vm
), alignment
,
4156 !!(flags
& PIN_MAPPABLE
),
4157 obj
->map_and_fenceable
);
4158 ret
= i915_vma_unbind(vma
);
4166 bound
= vma
? vma
->bound
: 0;
4167 if (vma
== NULL
|| !drm_mm_node_allocated(&vma
->node
)) {
4168 vma
= i915_gem_object_bind_to_vm(obj
, vm
, alignment
, flags
);
4170 return PTR_ERR(vma
);
4173 if (flags
& PIN_GLOBAL
&& !(vma
->bound
& GLOBAL_BIND
))
4174 vma
->bind_vma(vma
, obj
->cache_level
, GLOBAL_BIND
);
4176 if ((bound
^ vma
->bound
) & GLOBAL_BIND
) {
4177 bool mappable
, fenceable
;
4178 u32 fence_size
, fence_alignment
;
4180 fence_size
= i915_gem_get_gtt_size(obj
->base
.dev
,
4183 fence_alignment
= i915_gem_get_gtt_alignment(obj
->base
.dev
,
4188 fenceable
= (vma
->node
.size
== fence_size
&&
4189 (vma
->node
.start
& (fence_alignment
- 1)) == 0);
4191 mappable
= (vma
->node
.start
+ obj
->base
.size
<=
4192 dev_priv
->gtt
.mappable_end
);
4194 obj
->map_and_fenceable
= mappable
&& fenceable
;
4197 WARN_ON(flags
& PIN_MAPPABLE
&& !obj
->map_and_fenceable
);
4200 if (flags
& PIN_MAPPABLE
)
4201 obj
->pin_mappable
|= true;
4207 i915_gem_object_ggtt_unpin(struct drm_i915_gem_object
*obj
)
4209 struct i915_vma
*vma
= i915_gem_obj_to_ggtt(obj
);
4212 BUG_ON(vma
->pin_count
== 0);
4213 BUG_ON(!i915_gem_obj_ggtt_bound(obj
));
4215 if (--vma
->pin_count
== 0)
4216 obj
->pin_mappable
= false;
4220 i915_gem_object_pin_fence(struct drm_i915_gem_object
*obj
)
4222 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
4223 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
4224 struct i915_vma
*ggtt_vma
= i915_gem_obj_to_ggtt(obj
);
4226 WARN_ON(!ggtt_vma
||
4227 dev_priv
->fence_regs
[obj
->fence_reg
].pin_count
>
4228 ggtt_vma
->pin_count
);
4229 dev_priv
->fence_regs
[obj
->fence_reg
].pin_count
++;
4236 i915_gem_object_unpin_fence(struct drm_i915_gem_object
*obj
)
4238 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
4239 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
4240 WARN_ON(dev_priv
->fence_regs
[obj
->fence_reg
].pin_count
<= 0);
4241 dev_priv
->fence_regs
[obj
->fence_reg
].pin_count
--;
4246 i915_gem_pin_ioctl(struct drm_device
*dev
, void *data
,
4247 struct drm_file
*file
)
4249 struct drm_i915_gem_pin
*args
= data
;
4250 struct drm_i915_gem_object
*obj
;
4253 if (INTEL_INFO(dev
)->gen
>= 6)
4256 ret
= i915_mutex_lock_interruptible(dev
);
4260 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
4261 if (&obj
->base
== NULL
) {
4266 if (obj
->madv
!= I915_MADV_WILLNEED
) {
4267 DRM_DEBUG("Attempting to pin a purgeable buffer\n");
4272 if (obj
->pin_filp
!= NULL
&& obj
->pin_filp
!= file
) {
4273 DRM_DEBUG("Already pinned in i915_gem_pin_ioctl(): %d\n",
4279 if (obj
->user_pin_count
== ULONG_MAX
) {
4284 if (obj
->user_pin_count
== 0) {
4285 ret
= i915_gem_obj_ggtt_pin(obj
, args
->alignment
, PIN_MAPPABLE
);
4290 obj
->user_pin_count
++;
4291 obj
->pin_filp
= file
;
4293 args
->offset
= i915_gem_obj_ggtt_offset(obj
);
4295 drm_gem_object_unreference(&obj
->base
);
4297 mutex_unlock(&dev
->struct_mutex
);
4302 i915_gem_unpin_ioctl(struct drm_device
*dev
, void *data
,
4303 struct drm_file
*file
)
4305 struct drm_i915_gem_pin
*args
= data
;
4306 struct drm_i915_gem_object
*obj
;
4309 ret
= i915_mutex_lock_interruptible(dev
);
4313 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
4314 if (&obj
->base
== NULL
) {
4319 if (obj
->pin_filp
!= file
) {
4320 DRM_DEBUG("Not pinned by caller in i915_gem_pin_ioctl(): %d\n",
4325 obj
->user_pin_count
--;
4326 if (obj
->user_pin_count
== 0) {
4327 obj
->pin_filp
= NULL
;
4328 i915_gem_object_ggtt_unpin(obj
);
4332 drm_gem_object_unreference(&obj
->base
);
4334 mutex_unlock(&dev
->struct_mutex
);
4339 i915_gem_busy_ioctl(struct drm_device
*dev
, void *data
,
4340 struct drm_file
*file
)
4342 struct drm_i915_gem_busy
*args
= data
;
4343 struct drm_i915_gem_object
*obj
;
4346 ret
= i915_mutex_lock_interruptible(dev
);
4350 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
4351 if (&obj
->base
== NULL
) {
4356 /* Count all active objects as busy, even if they are currently not used
4357 * by the gpu. Users of this interface expect objects to eventually
4358 * become non-busy without any further actions, therefore emit any
4359 * necessary flushes here.
4361 ret
= i915_gem_object_flush_active(obj
);
4363 args
->busy
= obj
->active
;
4365 BUILD_BUG_ON(I915_NUM_RINGS
> 16);
4366 args
->busy
|= intel_ring_flag(obj
->ring
) << 16;
4369 drm_gem_object_unreference(&obj
->base
);
4371 mutex_unlock(&dev
->struct_mutex
);
4376 i915_gem_throttle_ioctl(struct drm_device
*dev
, void *data
,
4377 struct drm_file
*file_priv
)
4379 return i915_gem_ring_throttle(dev
, file_priv
);
4383 i915_gem_madvise_ioctl(struct drm_device
*dev
, void *data
,
4384 struct drm_file
*file_priv
)
4386 struct drm_i915_gem_madvise
*args
= data
;
4387 struct drm_i915_gem_object
*obj
;
4390 switch (args
->madv
) {
4391 case I915_MADV_DONTNEED
:
4392 case I915_MADV_WILLNEED
:
4398 ret
= i915_mutex_lock_interruptible(dev
);
4402 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file_priv
, args
->handle
));
4403 if (&obj
->base
== NULL
) {
4408 if (i915_gem_obj_is_pinned(obj
)) {
4413 if (obj
->madv
!= __I915_MADV_PURGED
)
4414 obj
->madv
= args
->madv
;
4416 /* if the object is no longer attached, discard its backing storage */
4417 if (i915_gem_object_is_purgeable(obj
) && obj
->pages
== NULL
)
4418 i915_gem_object_truncate(obj
);
4420 args
->retained
= obj
->madv
!= __I915_MADV_PURGED
;
4423 drm_gem_object_unreference(&obj
->base
);
4425 mutex_unlock(&dev
->struct_mutex
);
4429 void i915_gem_object_init(struct drm_i915_gem_object
*obj
,
4430 const struct drm_i915_gem_object_ops
*ops
)
4432 INIT_LIST_HEAD(&obj
->global_list
);
4433 INIT_LIST_HEAD(&obj
->ring_list
);
4434 INIT_LIST_HEAD(&obj
->obj_exec_link
);
4435 INIT_LIST_HEAD(&obj
->vma_list
);
4439 obj
->fence_reg
= I915_FENCE_REG_NONE
;
4440 obj
->madv
= I915_MADV_WILLNEED
;
4442 i915_gem_info_add_obj(obj
->base
.dev
->dev_private
, obj
->base
.size
);
4445 static const struct drm_i915_gem_object_ops i915_gem_object_ops
= {
4446 .get_pages
= i915_gem_object_get_pages_gtt
,
4447 .put_pages
= i915_gem_object_put_pages_gtt
,
4450 struct drm_i915_gem_object
*i915_gem_alloc_object(struct drm_device
*dev
,
4453 struct drm_i915_gem_object
*obj
;
4454 struct address_space
*mapping
;
4457 obj
= i915_gem_object_alloc(dev
);
4461 if (drm_gem_object_init(dev
, &obj
->base
, size
) != 0) {
4462 i915_gem_object_free(obj
);
4466 mask
= GFP_HIGHUSER
| __GFP_RECLAIMABLE
;
4467 if (IS_CRESTLINE(dev
) || IS_BROADWATER(dev
)) {
4468 /* 965gm cannot relocate objects above 4GiB. */
4469 mask
&= ~__GFP_HIGHMEM
;
4470 mask
|= __GFP_DMA32
;
4473 mapping
= file_inode(obj
->base
.filp
)->i_mapping
;
4474 mapping_set_gfp_mask(mapping
, mask
);
4476 i915_gem_object_init(obj
, &i915_gem_object_ops
);
4478 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
4479 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
4482 /* On some devices, we can have the GPU use the LLC (the CPU
4483 * cache) for about a 10% performance improvement
4484 * compared to uncached. Graphics requests other than
4485 * display scanout are coherent with the CPU in
4486 * accessing this cache. This means in this mode we
4487 * don't need to clflush on the CPU side, and on the
4488 * GPU side we only need to flush internal caches to
4489 * get data visible to the CPU.
4491 * However, we maintain the display planes as UC, and so
4492 * need to rebind when first used as such.
4494 obj
->cache_level
= I915_CACHE_LLC
;
4496 obj
->cache_level
= I915_CACHE_NONE
;
4498 trace_i915_gem_object_create(obj
);
4503 static bool discard_backing_storage(struct drm_i915_gem_object
*obj
)
4505 /* If we are the last user of the backing storage (be it shmemfs
4506 * pages or stolen etc), we know that the pages are going to be
4507 * immediately released. In this case, we can then skip copying
4508 * back the contents from the GPU.
4511 if (obj
->madv
!= I915_MADV_WILLNEED
)
4514 if (obj
->base
.filp
== NULL
)
4517 /* At first glance, this looks racy, but then again so would be
4518 * userspace racing mmap against close. However, the first external
4519 * reference to the filp can only be obtained through the
4520 * i915_gem_mmap_ioctl() which safeguards us against the user
4521 * acquiring such a reference whilst we are in the middle of
4522 * freeing the object.
4524 return atomic_long_read(&obj
->base
.filp
->f_count
) == 1;
4527 void i915_gem_free_object(struct drm_gem_object
*gem_obj
)
4529 struct drm_i915_gem_object
*obj
= to_intel_bo(gem_obj
);
4530 struct drm_device
*dev
= obj
->base
.dev
;
4531 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4532 struct i915_vma
*vma
, *next
;
4534 intel_runtime_pm_get(dev_priv
);
4536 trace_i915_gem_object_destroy(obj
);
4538 list_for_each_entry_safe(vma
, next
, &obj
->vma_list
, vma_link
) {
4542 ret
= i915_vma_unbind(vma
);
4543 if (WARN_ON(ret
== -ERESTARTSYS
)) {
4544 bool was_interruptible
;
4546 was_interruptible
= dev_priv
->mm
.interruptible
;
4547 dev_priv
->mm
.interruptible
= false;
4549 WARN_ON(i915_vma_unbind(vma
));
4551 dev_priv
->mm
.interruptible
= was_interruptible
;
4555 /* Stolen objects don't hold a ref, but do hold pin count. Fix that up
4556 * before progressing. */
4558 i915_gem_object_unpin_pages(obj
);
4560 WARN_ON(obj
->frontbuffer_bits
);
4562 if (WARN_ON(obj
->pages_pin_count
))
4563 obj
->pages_pin_count
= 0;
4564 if (discard_backing_storage(obj
))
4565 obj
->madv
= I915_MADV_DONTNEED
;
4566 i915_gem_object_put_pages(obj
);
4567 i915_gem_object_free_mmap_offset(obj
);
4571 if (obj
->base
.import_attach
)
4572 drm_prime_gem_destroy(&obj
->base
, NULL
);
4574 if (obj
->ops
->release
)
4575 obj
->ops
->release(obj
);
4577 drm_gem_object_release(&obj
->base
);
4578 i915_gem_info_remove_obj(dev_priv
, obj
->base
.size
);
4581 i915_gem_object_free(obj
);
4583 intel_runtime_pm_put(dev_priv
);
4586 struct i915_vma
*i915_gem_obj_to_vma(struct drm_i915_gem_object
*obj
,
4587 struct i915_address_space
*vm
)
4589 struct i915_vma
*vma
;
4590 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
)
4597 void i915_gem_vma_destroy(struct i915_vma
*vma
)
4599 struct i915_address_space
*vm
= NULL
;
4600 WARN_ON(vma
->node
.allocated
);
4602 /* Keep the vma as a placeholder in the execbuffer reservation lists */
4603 if (!list_empty(&vma
->exec_list
))
4608 if (!i915_is_ggtt(vm
))
4609 i915_ppgtt_put(i915_vm_to_ppgtt(vm
));
4611 list_del(&vma
->vma_link
);
4617 i915_gem_stop_ringbuffers(struct drm_device
*dev
)
4619 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4620 struct intel_engine_cs
*ring
;
4623 for_each_ring(ring
, dev_priv
, i
)
4624 dev_priv
->gt
.stop_ring(ring
);
4628 i915_gem_suspend(struct drm_device
*dev
)
4630 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4633 mutex_lock(&dev
->struct_mutex
);
4634 if (dev_priv
->ums
.mm_suspended
)
4637 ret
= i915_gpu_idle(dev
);
4641 i915_gem_retire_requests(dev
);
4643 /* Under UMS, be paranoid and evict. */
4644 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
4645 i915_gem_evict_everything(dev
);
4647 i915_kernel_lost_context(dev
);
4648 i915_gem_stop_ringbuffers(dev
);
4650 /* Hack! Don't let anybody do execbuf while we don't control the chip.
4651 * We need to replace this with a semaphore, or something.
4652 * And not confound ums.mm_suspended!
4654 dev_priv
->ums
.mm_suspended
= !drm_core_check_feature(dev
,
4656 mutex_unlock(&dev
->struct_mutex
);
4658 del_timer_sync(&dev_priv
->gpu_error
.hangcheck_timer
);
4659 cancel_delayed_work_sync(&dev_priv
->mm
.retire_work
);
4660 flush_delayed_work(&dev_priv
->mm
.idle_work
);
4665 mutex_unlock(&dev
->struct_mutex
);
4669 int i915_gem_l3_remap(struct intel_engine_cs
*ring
, int slice
)
4671 struct drm_device
*dev
= ring
->dev
;
4672 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4673 u32 reg_base
= GEN7_L3LOG_BASE
+ (slice
* 0x200);
4674 u32
*remap_info
= dev_priv
->l3_parity
.remap_info
[slice
];
4677 if (!HAS_L3_DPF(dev
) || !remap_info
)
4680 ret
= intel_ring_begin(ring
, GEN7_L3LOG_SIZE
/ 4 * 3);
4685 * Note: We do not worry about the concurrent register cacheline hang
4686 * here because no other code should access these registers other than
4687 * at initialization time.
4689 for (i
= 0; i
< GEN7_L3LOG_SIZE
; i
+= 4) {
4690 intel_ring_emit(ring
, MI_LOAD_REGISTER_IMM(1));
4691 intel_ring_emit(ring
, reg_base
+ i
);
4692 intel_ring_emit(ring
, remap_info
[i
/4]);
4695 intel_ring_advance(ring
);
4700 void i915_gem_init_swizzling(struct drm_device
*dev
)
4702 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4704 if (INTEL_INFO(dev
)->gen
< 5 ||
4705 dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_NONE
)
4708 I915_WRITE(DISP_ARB_CTL
, I915_READ(DISP_ARB_CTL
) |
4709 DISP_TILE_SURFACE_SWIZZLING
);
4714 I915_WRITE(TILECTL
, I915_READ(TILECTL
) | TILECTL_SWZCTL
);
4716 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB
));
4717 else if (IS_GEN7(dev
))
4718 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB
));
4719 else if (IS_GEN8(dev
))
4720 I915_WRITE(GAMTARBMODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_BDW
));
4726 intel_enable_blt(struct drm_device
*dev
)
4731 /* The blitter was dysfunctional on early prototypes */
4732 if (IS_GEN6(dev
) && dev
->pdev
->revision
< 8) {
4733 DRM_INFO("BLT not supported on this pre-production hardware;"
4734 " graphics performance will be degraded.\n");
4741 static void init_unused_ring(struct drm_device
*dev
, u32 base
)
4743 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4745 I915_WRITE(RING_CTL(base
), 0);
4746 I915_WRITE(RING_HEAD(base
), 0);
4747 I915_WRITE(RING_TAIL(base
), 0);
4748 I915_WRITE(RING_START(base
), 0);
4751 static void init_unused_rings(struct drm_device
*dev
)
4754 init_unused_ring(dev
, PRB1_BASE
);
4755 init_unused_ring(dev
, SRB0_BASE
);
4756 init_unused_ring(dev
, SRB1_BASE
);
4757 init_unused_ring(dev
, SRB2_BASE
);
4758 init_unused_ring(dev
, SRB3_BASE
);
4759 } else if (IS_GEN2(dev
)) {
4760 init_unused_ring(dev
, SRB0_BASE
);
4761 init_unused_ring(dev
, SRB1_BASE
);
4762 } else if (IS_GEN3(dev
)) {
4763 init_unused_ring(dev
, PRB1_BASE
);
4764 init_unused_ring(dev
, PRB2_BASE
);
4768 int i915_gem_init_rings(struct drm_device
*dev
)
4770 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4774 * At least 830 can leave some of the unused rings
4775 * "active" (ie. head != tail) after resume which
4776 * will prevent c3 entry. Makes sure all unused rings
4779 init_unused_rings(dev
);
4781 ret
= intel_init_render_ring_buffer(dev
);
4786 ret
= intel_init_bsd_ring_buffer(dev
);
4788 goto cleanup_render_ring
;
4791 if (intel_enable_blt(dev
)) {
4792 ret
= intel_init_blt_ring_buffer(dev
);
4794 goto cleanup_bsd_ring
;
4797 if (HAS_VEBOX(dev
)) {
4798 ret
= intel_init_vebox_ring_buffer(dev
);
4800 goto cleanup_blt_ring
;
4803 if (HAS_BSD2(dev
)) {
4804 ret
= intel_init_bsd2_ring_buffer(dev
);
4806 goto cleanup_vebox_ring
;
4809 ret
= i915_gem_set_seqno(dev
, ((u32
)~0 - 0x1000));
4811 goto cleanup_bsd2_ring
;
4816 intel_cleanup_ring_buffer(&dev_priv
->ring
[VCS2
]);
4818 intel_cleanup_ring_buffer(&dev_priv
->ring
[VECS
]);
4820 intel_cleanup_ring_buffer(&dev_priv
->ring
[BCS
]);
4822 intel_cleanup_ring_buffer(&dev_priv
->ring
[VCS
]);
4823 cleanup_render_ring
:
4824 intel_cleanup_ring_buffer(&dev_priv
->ring
[RCS
]);
4830 i915_gem_init_hw(struct drm_device
*dev
)
4832 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4835 if (INTEL_INFO(dev
)->gen
< 6 && !intel_enable_gtt())
4838 if (dev_priv
->ellc_size
)
4839 I915_WRITE(HSW_IDICR
, I915_READ(HSW_IDICR
) | IDIHASHMSK(0xf));
4841 if (IS_HASWELL(dev
))
4842 I915_WRITE(MI_PREDICATE_RESULT_2
, IS_HSW_GT3(dev
) ?
4843 LOWER_SLICE_ENABLED
: LOWER_SLICE_DISABLED
);
4845 if (HAS_PCH_NOP(dev
)) {
4846 if (IS_IVYBRIDGE(dev
)) {
4847 u32 temp
= I915_READ(GEN7_MSG_CTL
);
4848 temp
&= ~(WAIT_FOR_PCH_FLR_ACK
| WAIT_FOR_PCH_RESET_ACK
);
4849 I915_WRITE(GEN7_MSG_CTL
, temp
);
4850 } else if (INTEL_INFO(dev
)->gen
>= 7) {
4851 u32 temp
= I915_READ(HSW_NDE_RSTWRN_OPT
);
4852 temp
&= ~RESET_PCH_HANDSHAKE_ENABLE
;
4853 I915_WRITE(HSW_NDE_RSTWRN_OPT
, temp
);
4857 i915_gem_init_swizzling(dev
);
4859 ret
= dev_priv
->gt
.init_rings(dev
);
4863 for (i
= 0; i
< NUM_L3_SLICES(dev
); i
++)
4864 i915_gem_l3_remap(&dev_priv
->ring
[RCS
], i
);
4867 * XXX: Contexts should only be initialized once. Doing a switch to the
4868 * default context switch however is something we'd like to do after
4869 * reset or thaw (the latter may not actually be necessary for HW, but
4870 * goes with our code better). Context switching requires rings (for
4871 * the do_switch), but before enabling PPGTT. So don't move this.
4873 ret
= i915_gem_context_enable(dev_priv
);
4874 if (ret
&& ret
!= -EIO
) {
4875 DRM_ERROR("Context enable failed %d\n", ret
);
4876 i915_gem_cleanup_ringbuffer(dev
);
4881 ret
= i915_ppgtt_init_hw(dev
);
4882 if (ret
&& ret
!= -EIO
) {
4883 DRM_ERROR("PPGTT enable failed %d\n", ret
);
4884 i915_gem_cleanup_ringbuffer(dev
);
4890 int i915_gem_init(struct drm_device
*dev
)
4892 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4895 i915
.enable_execlists
= intel_sanitize_enable_execlists(dev
,
4896 i915
.enable_execlists
);
4898 mutex_lock(&dev
->struct_mutex
);
4900 if (IS_VALLEYVIEW(dev
)) {
4901 /* VLVA0 (potential hack), BIOS isn't actually waking us */
4902 I915_WRITE(VLV_GTLC_WAKE_CTRL
, VLV_GTLC_ALLOWWAKEREQ
);
4903 if (wait_for((I915_READ(VLV_GTLC_PW_STATUS
) &
4904 VLV_GTLC_ALLOWWAKEACK
), 10))
4905 DRM_DEBUG_DRIVER("allow wake ack timed out\n");
4908 if (!i915
.enable_execlists
) {
4909 dev_priv
->gt
.do_execbuf
= i915_gem_ringbuffer_submission
;
4910 dev_priv
->gt
.init_rings
= i915_gem_init_rings
;
4911 dev_priv
->gt
.cleanup_ring
= intel_cleanup_ring_buffer
;
4912 dev_priv
->gt
.stop_ring
= intel_stop_ring_buffer
;
4914 dev_priv
->gt
.do_execbuf
= intel_execlists_submission
;
4915 dev_priv
->gt
.init_rings
= intel_logical_rings_init
;
4916 dev_priv
->gt
.cleanup_ring
= intel_logical_ring_cleanup
;
4917 dev_priv
->gt
.stop_ring
= intel_logical_ring_stop
;
4920 ret
= i915_gem_init_userptr(dev
);
4922 mutex_unlock(&dev
->struct_mutex
);
4926 i915_gem_init_global_gtt(dev
);
4928 ret
= i915_gem_context_init(dev
);
4930 mutex_unlock(&dev
->struct_mutex
);
4934 ret
= i915_gem_init_hw(dev
);
4936 /* Allow ring initialisation to fail by marking the GPU as
4937 * wedged. But we only want to do this where the GPU is angry,
4938 * for all other failure, such as an allocation failure, bail.
4940 DRM_ERROR("Failed to initialize GPU, declaring it wedged\n");
4941 atomic_set_mask(I915_WEDGED
, &dev_priv
->gpu_error
.reset_counter
);
4944 mutex_unlock(&dev
->struct_mutex
);
4946 /* Allow hardware batchbuffers unless told otherwise, but not for KMS. */
4947 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
4948 dev_priv
->dri1
.allow_batchbuffer
= 1;
4953 i915_gem_cleanup_ringbuffer(struct drm_device
*dev
)
4955 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4956 struct intel_engine_cs
*ring
;
4959 for_each_ring(ring
, dev_priv
, i
)
4960 dev_priv
->gt
.cleanup_ring(ring
);
4964 i915_gem_entervt_ioctl(struct drm_device
*dev
, void *data
,
4965 struct drm_file
*file_priv
)
4967 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4970 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4973 if (i915_reset_in_progress(&dev_priv
->gpu_error
)) {
4974 DRM_ERROR("Reenabling wedged hardware, good luck\n");
4975 atomic_set(&dev_priv
->gpu_error
.reset_counter
, 0);
4978 mutex_lock(&dev
->struct_mutex
);
4979 dev_priv
->ums
.mm_suspended
= 0;
4981 ret
= i915_gem_init_hw(dev
);
4983 mutex_unlock(&dev
->struct_mutex
);
4987 BUG_ON(!list_empty(&dev_priv
->gtt
.base
.active_list
));
4989 ret
= drm_irq_install(dev
, dev
->pdev
->irq
);
4991 goto cleanup_ringbuffer
;
4992 mutex_unlock(&dev
->struct_mutex
);
4997 i915_gem_cleanup_ringbuffer(dev
);
4998 dev_priv
->ums
.mm_suspended
= 1;
4999 mutex_unlock(&dev
->struct_mutex
);
5005 i915_gem_leavevt_ioctl(struct drm_device
*dev
, void *data
,
5006 struct drm_file
*file_priv
)
5008 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
5011 mutex_lock(&dev
->struct_mutex
);
5012 drm_irq_uninstall(dev
);
5013 mutex_unlock(&dev
->struct_mutex
);
5015 return i915_gem_suspend(dev
);
5019 i915_gem_lastclose(struct drm_device
*dev
)
5023 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
5026 ret
= i915_gem_suspend(dev
);
5028 DRM_ERROR("failed to idle hardware: %d\n", ret
);
5032 init_ring_lists(struct intel_engine_cs
*ring
)
5034 INIT_LIST_HEAD(&ring
->active_list
);
5035 INIT_LIST_HEAD(&ring
->request_list
);
5038 void i915_init_vm(struct drm_i915_private
*dev_priv
,
5039 struct i915_address_space
*vm
)
5041 if (!i915_is_ggtt(vm
))
5042 drm_mm_init(&vm
->mm
, vm
->start
, vm
->total
);
5043 vm
->dev
= dev_priv
->dev
;
5044 INIT_LIST_HEAD(&vm
->active_list
);
5045 INIT_LIST_HEAD(&vm
->inactive_list
);
5046 INIT_LIST_HEAD(&vm
->global_link
);
5047 list_add_tail(&vm
->global_link
, &dev_priv
->vm_list
);
5051 i915_gem_load(struct drm_device
*dev
)
5053 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5057 kmem_cache_create("i915_gem_object",
5058 sizeof(struct drm_i915_gem_object
), 0,
5062 INIT_LIST_HEAD(&dev_priv
->vm_list
);
5063 i915_init_vm(dev_priv
, &dev_priv
->gtt
.base
);
5065 INIT_LIST_HEAD(&dev_priv
->context_list
);
5066 INIT_LIST_HEAD(&dev_priv
->mm
.unbound_list
);
5067 INIT_LIST_HEAD(&dev_priv
->mm
.bound_list
);
5068 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
5069 for (i
= 0; i
< I915_NUM_RINGS
; i
++)
5070 init_ring_lists(&dev_priv
->ring
[i
]);
5071 for (i
= 0; i
< I915_MAX_NUM_FENCES
; i
++)
5072 INIT_LIST_HEAD(&dev_priv
->fence_regs
[i
].lru_list
);
5073 INIT_DELAYED_WORK(&dev_priv
->mm
.retire_work
,
5074 i915_gem_retire_work_handler
);
5075 INIT_DELAYED_WORK(&dev_priv
->mm
.idle_work
,
5076 i915_gem_idle_work_handler
);
5077 init_waitqueue_head(&dev_priv
->gpu_error
.reset_queue
);
5079 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
5080 if (!drm_core_check_feature(dev
, DRIVER_MODESET
) && IS_GEN3(dev
)) {
5081 I915_WRITE(MI_ARB_STATE
,
5082 _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE
));
5085 dev_priv
->relative_constants_mode
= I915_EXEC_CONSTANTS_REL_GENERAL
;
5087 /* Old X drivers will take 0-2 for front, back, depth buffers */
5088 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
5089 dev_priv
->fence_reg_start
= 3;
5091 if (INTEL_INFO(dev
)->gen
>= 7 && !IS_VALLEYVIEW(dev
))
5092 dev_priv
->num_fence_regs
= 32;
5093 else if (INTEL_INFO(dev
)->gen
>= 4 || IS_I945G(dev
) || IS_I945GM(dev
) || IS_G33(dev
))
5094 dev_priv
->num_fence_regs
= 16;
5096 dev_priv
->num_fence_regs
= 8;
5098 /* Initialize fence registers to zero */
5099 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
5100 i915_gem_restore_fences(dev
);
5102 i915_gem_detect_bit_6_swizzle(dev
);
5103 init_waitqueue_head(&dev_priv
->pending_flip_queue
);
5105 dev_priv
->mm
.interruptible
= true;
5107 dev_priv
->mm
.shrinker
.scan_objects
= i915_gem_shrinker_scan
;
5108 dev_priv
->mm
.shrinker
.count_objects
= i915_gem_shrinker_count
;
5109 dev_priv
->mm
.shrinker
.seeks
= DEFAULT_SEEKS
;
5110 register_shrinker(&dev_priv
->mm
.shrinker
);
5112 dev_priv
->mm
.oom_notifier
.notifier_call
= i915_gem_shrinker_oom
;
5113 register_oom_notifier(&dev_priv
->mm
.oom_notifier
);
5115 mutex_init(&dev_priv
->fb_tracking
.lock
);
5118 void i915_gem_release(struct drm_device
*dev
, struct drm_file
*file
)
5120 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
5122 cancel_delayed_work_sync(&file_priv
->mm
.idle_work
);
5124 /* Clean up our request list when the client is going away, so that
5125 * later retire_requests won't dereference our soon-to-be-gone
5128 spin_lock(&file_priv
->mm
.lock
);
5129 while (!list_empty(&file_priv
->mm
.request_list
)) {
5130 struct drm_i915_gem_request
*request
;
5132 request
= list_first_entry(&file_priv
->mm
.request_list
,
5133 struct drm_i915_gem_request
,
5135 list_del(&request
->client_list
);
5136 request
->file_priv
= NULL
;
5138 spin_unlock(&file_priv
->mm
.lock
);
5142 i915_gem_file_idle_work_handler(struct work_struct
*work
)
5144 struct drm_i915_file_private
*file_priv
=
5145 container_of(work
, typeof(*file_priv
), mm
.idle_work
.work
);
5147 atomic_set(&file_priv
->rps_wait_boost
, false);
5150 int i915_gem_open(struct drm_device
*dev
, struct drm_file
*file
)
5152 struct drm_i915_file_private
*file_priv
;
5155 DRM_DEBUG_DRIVER("\n");
5157 file_priv
= kzalloc(sizeof(*file_priv
), GFP_KERNEL
);
5161 file
->driver_priv
= file_priv
;
5162 file_priv
->dev_priv
= dev
->dev_private
;
5163 file_priv
->file
= file
;
5165 spin_lock_init(&file_priv
->mm
.lock
);
5166 INIT_LIST_HEAD(&file_priv
->mm
.request_list
);
5167 INIT_DELAYED_WORK(&file_priv
->mm
.idle_work
,
5168 i915_gem_file_idle_work_handler
);
5170 ret
= i915_gem_context_open(dev
, file
);
5178 * i915_gem_track_fb - update frontbuffer tracking
5179 * old: current GEM buffer for the frontbuffer slots
5180 * new: new GEM buffer for the frontbuffer slots
5181 * frontbuffer_bits: bitmask of frontbuffer slots
5183 * This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them
5184 * from @old and setting them in @new. Both @old and @new can be NULL.
5186 void i915_gem_track_fb(struct drm_i915_gem_object
*old
,
5187 struct drm_i915_gem_object
*new,
5188 unsigned frontbuffer_bits
)
5191 WARN_ON(!mutex_is_locked(&old
->base
.dev
->struct_mutex
));
5192 WARN_ON(!(old
->frontbuffer_bits
& frontbuffer_bits
));
5193 old
->frontbuffer_bits
&= ~frontbuffer_bits
;
5197 WARN_ON(!mutex_is_locked(&new->base
.dev
->struct_mutex
));
5198 WARN_ON(new->frontbuffer_bits
& frontbuffer_bits
);
5199 new->frontbuffer_bits
|= frontbuffer_bits
;
5203 static bool mutex_is_locked_by(struct mutex
*mutex
, struct task_struct
*task
)
5205 if (!mutex_is_locked(mutex
))
5208 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES)
5209 return mutex
->owner
== task
;
5211 /* Since UP may be pre-empted, we cannot assume that we own the lock */
5216 static bool i915_gem_shrinker_lock(struct drm_device
*dev
, bool *unlock
)
5218 if (!mutex_trylock(&dev
->struct_mutex
)) {
5219 if (!mutex_is_locked_by(&dev
->struct_mutex
, current
))
5222 if (to_i915(dev
)->mm
.shrinker_no_lock_stealing
)
5232 static int num_vma_bound(struct drm_i915_gem_object
*obj
)
5234 struct i915_vma
*vma
;
5237 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
)
5238 if (drm_mm_node_allocated(&vma
->node
))
5244 static unsigned long
5245 i915_gem_shrinker_count(struct shrinker
*shrinker
, struct shrink_control
*sc
)
5247 struct drm_i915_private
*dev_priv
=
5248 container_of(shrinker
, struct drm_i915_private
, mm
.shrinker
);
5249 struct drm_device
*dev
= dev_priv
->dev
;
5250 struct drm_i915_gem_object
*obj
;
5251 unsigned long count
;
5254 if (!i915_gem_shrinker_lock(dev
, &unlock
))
5258 list_for_each_entry(obj
, &dev_priv
->mm
.unbound_list
, global_list
)
5259 if (obj
->pages_pin_count
== 0)
5260 count
+= obj
->base
.size
>> PAGE_SHIFT
;
5262 list_for_each_entry(obj
, &dev_priv
->mm
.bound_list
, global_list
) {
5263 if (!i915_gem_obj_is_pinned(obj
) &&
5264 obj
->pages_pin_count
== num_vma_bound(obj
))
5265 count
+= obj
->base
.size
>> PAGE_SHIFT
;
5269 mutex_unlock(&dev
->struct_mutex
);
5274 /* All the new VM stuff */
5275 unsigned long i915_gem_obj_offset(struct drm_i915_gem_object
*o
,
5276 struct i915_address_space
*vm
)
5278 struct drm_i915_private
*dev_priv
= o
->base
.dev
->dev_private
;
5279 struct i915_vma
*vma
;
5281 WARN_ON(vm
== &dev_priv
->mm
.aliasing_ppgtt
->base
);
5283 list_for_each_entry(vma
, &o
->vma_list
, vma_link
) {
5285 return vma
->node
.start
;
5288 WARN(1, "%s vma for this object not found.\n",
5289 i915_is_ggtt(vm
) ? "global" : "ppgtt");
5293 bool i915_gem_obj_bound(struct drm_i915_gem_object
*o
,
5294 struct i915_address_space
*vm
)
5296 struct i915_vma
*vma
;
5298 list_for_each_entry(vma
, &o
->vma_list
, vma_link
)
5299 if (vma
->vm
== vm
&& drm_mm_node_allocated(&vma
->node
))
5305 bool i915_gem_obj_bound_any(struct drm_i915_gem_object
*o
)
5307 struct i915_vma
*vma
;
5309 list_for_each_entry(vma
, &o
->vma_list
, vma_link
)
5310 if (drm_mm_node_allocated(&vma
->node
))
5316 unsigned long i915_gem_obj_size(struct drm_i915_gem_object
*o
,
5317 struct i915_address_space
*vm
)
5319 struct drm_i915_private
*dev_priv
= o
->base
.dev
->dev_private
;
5320 struct i915_vma
*vma
;
5322 WARN_ON(vm
== &dev_priv
->mm
.aliasing_ppgtt
->base
);
5324 BUG_ON(list_empty(&o
->vma_list
));
5326 list_for_each_entry(vma
, &o
->vma_list
, vma_link
)
5328 return vma
->node
.size
;
5333 static unsigned long
5334 i915_gem_shrinker_scan(struct shrinker
*shrinker
, struct shrink_control
*sc
)
5336 struct drm_i915_private
*dev_priv
=
5337 container_of(shrinker
, struct drm_i915_private
, mm
.shrinker
);
5338 struct drm_device
*dev
= dev_priv
->dev
;
5339 unsigned long freed
;
5342 if (!i915_gem_shrinker_lock(dev
, &unlock
))
5345 freed
= i915_gem_shrink(dev_priv
,
5348 I915_SHRINK_UNBOUND
|
5349 I915_SHRINK_PURGEABLE
);
5350 if (freed
< sc
->nr_to_scan
)
5351 freed
+= i915_gem_shrink(dev_priv
,
5352 sc
->nr_to_scan
- freed
,
5354 I915_SHRINK_UNBOUND
);
5356 mutex_unlock(&dev
->struct_mutex
);
5362 i915_gem_shrinker_oom(struct notifier_block
*nb
, unsigned long event
, void *ptr
)
5364 struct drm_i915_private
*dev_priv
=
5365 container_of(nb
, struct drm_i915_private
, mm
.oom_notifier
);
5366 struct drm_device
*dev
= dev_priv
->dev
;
5367 struct drm_i915_gem_object
*obj
;
5368 unsigned long timeout
= msecs_to_jiffies(5000) + 1;
5369 unsigned long pinned
, bound
, unbound
, freed_pages
;
5370 bool was_interruptible
;
5373 while (!i915_gem_shrinker_lock(dev
, &unlock
) && --timeout
) {
5374 schedule_timeout_killable(1);
5375 if (fatal_signal_pending(current
))
5379 pr_err("Unable to purge GPU memory due lock contention.\n");
5383 was_interruptible
= dev_priv
->mm
.interruptible
;
5384 dev_priv
->mm
.interruptible
= false;
5386 freed_pages
= i915_gem_shrink_all(dev_priv
);
5388 dev_priv
->mm
.interruptible
= was_interruptible
;
5390 /* Because we may be allocating inside our own driver, we cannot
5391 * assert that there are no objects with pinned pages that are not
5392 * being pointed to by hardware.
5394 unbound
= bound
= pinned
= 0;
5395 list_for_each_entry(obj
, &dev_priv
->mm
.unbound_list
, global_list
) {
5396 if (!obj
->base
.filp
) /* not backed by a freeable object */
5399 if (obj
->pages_pin_count
)
5400 pinned
+= obj
->base
.size
;
5402 unbound
+= obj
->base
.size
;
5404 list_for_each_entry(obj
, &dev_priv
->mm
.bound_list
, global_list
) {
5405 if (!obj
->base
.filp
)
5408 if (obj
->pages_pin_count
)
5409 pinned
+= obj
->base
.size
;
5411 bound
+= obj
->base
.size
;
5415 mutex_unlock(&dev
->struct_mutex
);
5417 if (freed_pages
|| unbound
|| bound
)
5418 pr_info("Purging GPU memory, %lu bytes freed, %lu bytes still pinned.\n",
5419 freed_pages
<< PAGE_SHIFT
, pinned
);
5420 if (unbound
|| bound
)
5421 pr_err("%lu and %lu bytes still available in the "
5422 "bound and unbound GPU page lists.\n",
5425 *(unsigned long *)ptr
+= freed_pages
;
5429 struct i915_vma
*i915_gem_obj_to_ggtt(struct drm_i915_gem_object
*obj
)
5431 struct i915_vma
*vma
;
5433 vma
= list_first_entry(&obj
->vma_list
, typeof(*vma
), vma_link
);
5434 if (vma
->vm
!= i915_obj_to_ggtt(obj
))