2 * Copyright © 2008-2015 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_vgpu.h"
33 #include "i915_trace.h"
34 #include "intel_drv.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 #define RQ_BUG_ON(expr)
43 static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
);
44 static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
);
46 i915_gem_object_retire__write(struct drm_i915_gem_object
*obj
);
48 i915_gem_object_retire__read(struct drm_i915_gem_object
*obj
, int ring
);
49 static void i915_gem_write_fence(struct drm_device
*dev
, int reg
,
50 struct drm_i915_gem_object
*obj
);
51 static void i915_gem_object_update_fence(struct drm_i915_gem_object
*obj
,
52 struct drm_i915_fence_reg
*fence
,
55 static bool cpu_cache_is_coherent(struct drm_device
*dev
,
56 enum i915_cache_level level
)
58 return HAS_LLC(dev
) || level
!= I915_CACHE_NONE
;
61 static bool cpu_write_needs_clflush(struct drm_i915_gem_object
*obj
)
63 if (!cpu_cache_is_coherent(obj
->base
.dev
, obj
->cache_level
))
66 return obj
->pin_display
;
69 static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object
*obj
)
72 i915_gem_release_mmap(obj
);
74 /* As we do not have an associated fence register, we will force
75 * a tiling change if we ever need to acquire one.
77 obj
->fence_dirty
= false;
78 obj
->fence_reg
= I915_FENCE_REG_NONE
;
81 /* some bookkeeping */
82 static void i915_gem_info_add_obj(struct drm_i915_private
*dev_priv
,
85 spin_lock(&dev_priv
->mm
.object_stat_lock
);
86 dev_priv
->mm
.object_count
++;
87 dev_priv
->mm
.object_memory
+= size
;
88 spin_unlock(&dev_priv
->mm
.object_stat_lock
);
91 static void i915_gem_info_remove_obj(struct drm_i915_private
*dev_priv
,
94 spin_lock(&dev_priv
->mm
.object_stat_lock
);
95 dev_priv
->mm
.object_count
--;
96 dev_priv
->mm
.object_memory
-= size
;
97 spin_unlock(&dev_priv
->mm
.object_stat_lock
);
101 i915_gem_wait_for_error(struct i915_gpu_error
*error
)
105 #define EXIT_COND (!i915_reset_in_progress(error) || \
106 i915_terminally_wedged(error))
111 * Only wait 10 seconds for the gpu reset to complete to avoid hanging
112 * userspace. If it takes that long something really bad is going on and
113 * we should simply try to bail out and fail as gracefully as possible.
115 ret
= wait_event_interruptible_timeout(error
->reset_queue
,
119 DRM_ERROR("Timed out waiting for the gpu reset to complete\n");
121 } else if (ret
< 0) {
129 int i915_mutex_lock_interruptible(struct drm_device
*dev
)
131 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
134 ret
= i915_gem_wait_for_error(&dev_priv
->gpu_error
);
138 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
142 WARN_ON(i915_verify_lists(dev
));
147 i915_gem_get_aperture_ioctl(struct drm_device
*dev
, void *data
,
148 struct drm_file
*file
)
150 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
151 struct drm_i915_gem_get_aperture
*args
= data
;
152 struct drm_i915_gem_object
*obj
;
156 mutex_lock(&dev
->struct_mutex
);
157 list_for_each_entry(obj
, &dev_priv
->mm
.bound_list
, global_list
)
158 if (i915_gem_obj_is_pinned(obj
))
159 pinned
+= i915_gem_obj_ggtt_size(obj
);
160 mutex_unlock(&dev
->struct_mutex
);
162 args
->aper_size
= dev_priv
->gtt
.base
.total
;
163 args
->aper_available_size
= args
->aper_size
- pinned
;
169 i915_gem_object_get_pages_phys(struct drm_i915_gem_object
*obj
)
171 struct address_space
*mapping
= file_inode(obj
->base
.filp
)->i_mapping
;
172 char *vaddr
= obj
->phys_handle
->vaddr
;
174 struct scatterlist
*sg
;
177 if (WARN_ON(i915_gem_object_needs_bit17_swizzle(obj
)))
180 for (i
= 0; i
< obj
->base
.size
/ PAGE_SIZE
; i
++) {
184 page
= shmem_read_mapping_page(mapping
, i
);
186 return PTR_ERR(page
);
188 src
= kmap_atomic(page
);
189 memcpy(vaddr
, src
, PAGE_SIZE
);
190 drm_clflush_virt_range(vaddr
, PAGE_SIZE
);
193 page_cache_release(page
);
197 i915_gem_chipset_flush(obj
->base
.dev
);
199 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
203 if (sg_alloc_table(st
, 1, GFP_KERNEL
)) {
210 sg
->length
= obj
->base
.size
;
212 sg_dma_address(sg
) = obj
->phys_handle
->busaddr
;
213 sg_dma_len(sg
) = obj
->base
.size
;
216 obj
->has_dma_mapping
= true;
221 i915_gem_object_put_pages_phys(struct drm_i915_gem_object
*obj
)
225 BUG_ON(obj
->madv
== __I915_MADV_PURGED
);
227 ret
= i915_gem_object_set_to_cpu_domain(obj
, true);
229 /* In the event of a disaster, abandon all caches and
232 WARN_ON(ret
!= -EIO
);
233 obj
->base
.read_domains
= obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
236 if (obj
->madv
== I915_MADV_DONTNEED
)
240 struct address_space
*mapping
= file_inode(obj
->base
.filp
)->i_mapping
;
241 char *vaddr
= obj
->phys_handle
->vaddr
;
244 for (i
= 0; i
< obj
->base
.size
/ PAGE_SIZE
; i
++) {
248 page
= shmem_read_mapping_page(mapping
, i
);
252 dst
= kmap_atomic(page
);
253 drm_clflush_virt_range(vaddr
, PAGE_SIZE
);
254 memcpy(dst
, vaddr
, PAGE_SIZE
);
257 set_page_dirty(page
);
258 if (obj
->madv
== I915_MADV_WILLNEED
)
259 mark_page_accessed(page
);
260 page_cache_release(page
);
266 sg_free_table(obj
->pages
);
269 obj
->has_dma_mapping
= false;
273 i915_gem_object_release_phys(struct drm_i915_gem_object
*obj
)
275 drm_pci_free(obj
->base
.dev
, obj
->phys_handle
);
278 static const struct drm_i915_gem_object_ops i915_gem_phys_ops
= {
279 .get_pages
= i915_gem_object_get_pages_phys
,
280 .put_pages
= i915_gem_object_put_pages_phys
,
281 .release
= i915_gem_object_release_phys
,
285 drop_pages(struct drm_i915_gem_object
*obj
)
287 struct i915_vma
*vma
, *next
;
290 drm_gem_object_reference(&obj
->base
);
291 list_for_each_entry_safe(vma
, next
, &obj
->vma_list
, vma_link
)
292 if (i915_vma_unbind(vma
))
295 ret
= i915_gem_object_put_pages(obj
);
296 drm_gem_object_unreference(&obj
->base
);
302 i915_gem_object_attach_phys(struct drm_i915_gem_object
*obj
,
305 drm_dma_handle_t
*phys
;
308 if (obj
->phys_handle
) {
309 if ((unsigned long)obj
->phys_handle
->vaddr
& (align
-1))
315 if (obj
->madv
!= I915_MADV_WILLNEED
)
318 if (obj
->base
.filp
== NULL
)
321 ret
= drop_pages(obj
);
325 /* create a new object */
326 phys
= drm_pci_alloc(obj
->base
.dev
, obj
->base
.size
, align
);
330 obj
->phys_handle
= phys
;
331 obj
->ops
= &i915_gem_phys_ops
;
333 return i915_gem_object_get_pages(obj
);
337 i915_gem_phys_pwrite(struct drm_i915_gem_object
*obj
,
338 struct drm_i915_gem_pwrite
*args
,
339 struct drm_file
*file_priv
)
341 struct drm_device
*dev
= obj
->base
.dev
;
342 void *vaddr
= obj
->phys_handle
->vaddr
+ args
->offset
;
343 char __user
*user_data
= to_user_ptr(args
->data_ptr
);
346 /* We manually control the domain here and pretend that it
347 * remains coherent i.e. in the GTT domain, like shmem_pwrite.
349 ret
= i915_gem_object_wait_rendering(obj
, false);
353 intel_fb_obj_invalidate(obj
, ORIGIN_CPU
);
354 if (__copy_from_user_inatomic_nocache(vaddr
, user_data
, args
->size
)) {
355 unsigned long unwritten
;
357 /* The physical object once assigned is fixed for the lifetime
358 * of the obj, so we can safely drop the lock and continue
361 mutex_unlock(&dev
->struct_mutex
);
362 unwritten
= copy_from_user(vaddr
, user_data
, args
->size
);
363 mutex_lock(&dev
->struct_mutex
);
370 drm_clflush_virt_range(vaddr
, args
->size
);
371 i915_gem_chipset_flush(dev
);
374 intel_fb_obj_flush(obj
, false);
378 void *i915_gem_object_alloc(struct drm_device
*dev
)
380 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
381 return kmem_cache_zalloc(dev_priv
->objects
, GFP_KERNEL
);
384 void i915_gem_object_free(struct drm_i915_gem_object
*obj
)
386 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
387 kmem_cache_free(dev_priv
->objects
, obj
);
391 i915_gem_create(struct drm_file
*file
,
392 struct drm_device
*dev
,
396 struct drm_i915_gem_object
*obj
;
400 size
= roundup(size
, PAGE_SIZE
);
404 /* Allocate the new object */
405 obj
= i915_gem_alloc_object(dev
, size
);
409 ret
= drm_gem_handle_create(file
, &obj
->base
, &handle
);
410 /* drop reference from allocate - handle holds it now */
411 drm_gem_object_unreference_unlocked(&obj
->base
);
420 i915_gem_dumb_create(struct drm_file
*file
,
421 struct drm_device
*dev
,
422 struct drm_mode_create_dumb
*args
)
424 /* have to work out size/pitch and return them */
425 args
->pitch
= ALIGN(args
->width
* DIV_ROUND_UP(args
->bpp
, 8), 64);
426 args
->size
= args
->pitch
* args
->height
;
427 return i915_gem_create(file
, dev
,
428 args
->size
, &args
->handle
);
432 * Creates a new mm object and returns a handle to it.
435 i915_gem_create_ioctl(struct drm_device
*dev
, void *data
,
436 struct drm_file
*file
)
438 struct drm_i915_gem_create
*args
= data
;
440 return i915_gem_create(file
, dev
,
441 args
->size
, &args
->handle
);
445 __copy_to_user_swizzled(char __user
*cpu_vaddr
,
446 const char *gpu_vaddr
, int gpu_offset
,
449 int ret
, cpu_offset
= 0;
452 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
453 int this_length
= min(cacheline_end
- gpu_offset
, length
);
454 int swizzled_gpu_offset
= gpu_offset
^ 64;
456 ret
= __copy_to_user(cpu_vaddr
+ cpu_offset
,
457 gpu_vaddr
+ swizzled_gpu_offset
,
462 cpu_offset
+= this_length
;
463 gpu_offset
+= this_length
;
464 length
-= this_length
;
471 __copy_from_user_swizzled(char *gpu_vaddr
, int gpu_offset
,
472 const char __user
*cpu_vaddr
,
475 int ret
, cpu_offset
= 0;
478 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
479 int this_length
= min(cacheline_end
- gpu_offset
, length
);
480 int swizzled_gpu_offset
= gpu_offset
^ 64;
482 ret
= __copy_from_user(gpu_vaddr
+ swizzled_gpu_offset
,
483 cpu_vaddr
+ cpu_offset
,
488 cpu_offset
+= this_length
;
489 gpu_offset
+= this_length
;
490 length
-= this_length
;
497 * Pins the specified object's pages and synchronizes the object with
498 * GPU accesses. Sets needs_clflush to non-zero if the caller should
499 * flush the object from the CPU cache.
501 int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object
*obj
,
511 if (!(obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
)) {
512 /* If we're not in the cpu read domain, set ourself into the gtt
513 * read domain and manually flush cachelines (if required). This
514 * optimizes for the case when the gpu will dirty the data
515 * anyway again before the next pread happens. */
516 *needs_clflush
= !cpu_cache_is_coherent(obj
->base
.dev
,
518 ret
= i915_gem_object_wait_rendering(obj
, true);
523 ret
= i915_gem_object_get_pages(obj
);
527 i915_gem_object_pin_pages(obj
);
532 /* Per-page copy function for the shmem pread fastpath.
533 * Flushes invalid cachelines before reading the target if
534 * needs_clflush is set. */
536 shmem_pread_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
537 char __user
*user_data
,
538 bool page_do_bit17_swizzling
, bool needs_clflush
)
543 if (unlikely(page_do_bit17_swizzling
))
546 vaddr
= kmap_atomic(page
);
548 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
550 ret
= __copy_to_user_inatomic(user_data
,
551 vaddr
+ shmem_page_offset
,
553 kunmap_atomic(vaddr
);
555 return ret
? -EFAULT
: 0;
559 shmem_clflush_swizzled_range(char *addr
, unsigned long length
,
562 if (unlikely(swizzled
)) {
563 unsigned long start
= (unsigned long) addr
;
564 unsigned long end
= (unsigned long) addr
+ length
;
566 /* For swizzling simply ensure that we always flush both
567 * channels. Lame, but simple and it works. Swizzled
568 * pwrite/pread is far from a hotpath - current userspace
569 * doesn't use it at all. */
570 start
= round_down(start
, 128);
571 end
= round_up(end
, 128);
573 drm_clflush_virt_range((void *)start
, end
- start
);
575 drm_clflush_virt_range(addr
, length
);
580 /* Only difference to the fast-path function is that this can handle bit17
581 * and uses non-atomic copy and kmap functions. */
583 shmem_pread_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
584 char __user
*user_data
,
585 bool page_do_bit17_swizzling
, bool needs_clflush
)
592 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
594 page_do_bit17_swizzling
);
596 if (page_do_bit17_swizzling
)
597 ret
= __copy_to_user_swizzled(user_data
,
598 vaddr
, shmem_page_offset
,
601 ret
= __copy_to_user(user_data
,
602 vaddr
+ shmem_page_offset
,
606 return ret
? - EFAULT
: 0;
610 i915_gem_shmem_pread(struct drm_device
*dev
,
611 struct drm_i915_gem_object
*obj
,
612 struct drm_i915_gem_pread
*args
,
613 struct drm_file
*file
)
615 char __user
*user_data
;
618 int shmem_page_offset
, page_length
, ret
= 0;
619 int obj_do_bit17_swizzling
, page_do_bit17_swizzling
;
621 int needs_clflush
= 0;
622 struct sg_page_iter sg_iter
;
624 user_data
= to_user_ptr(args
->data_ptr
);
627 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
629 ret
= i915_gem_obj_prepare_shmem_read(obj
, &needs_clflush
);
633 offset
= args
->offset
;
635 for_each_sg_page(obj
->pages
->sgl
, &sg_iter
, obj
->pages
->nents
,
636 offset
>> PAGE_SHIFT
) {
637 struct page
*page
= sg_page_iter_page(&sg_iter
);
642 /* Operation in this page
644 * shmem_page_offset = offset within page in shmem file
645 * page_length = bytes to copy for this page
647 shmem_page_offset
= offset_in_page(offset
);
648 page_length
= remain
;
649 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
650 page_length
= PAGE_SIZE
- shmem_page_offset
;
652 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
653 (page_to_phys(page
) & (1 << 17)) != 0;
655 ret
= shmem_pread_fast(page
, shmem_page_offset
, page_length
,
656 user_data
, page_do_bit17_swizzling
,
661 mutex_unlock(&dev
->struct_mutex
);
663 if (likely(!i915
.prefault_disable
) && !prefaulted
) {
664 ret
= fault_in_multipages_writeable(user_data
, remain
);
665 /* Userspace is tricking us, but we've already clobbered
666 * its pages with the prefault and promised to write the
667 * data up to the first fault. Hence ignore any errors
668 * and just continue. */
673 ret
= shmem_pread_slow(page
, shmem_page_offset
, page_length
,
674 user_data
, page_do_bit17_swizzling
,
677 mutex_lock(&dev
->struct_mutex
);
683 remain
-= page_length
;
684 user_data
+= page_length
;
685 offset
+= page_length
;
689 i915_gem_object_unpin_pages(obj
);
695 * Reads data from the object referenced by handle.
697 * On error, the contents of *data are undefined.
700 i915_gem_pread_ioctl(struct drm_device
*dev
, void *data
,
701 struct drm_file
*file
)
703 struct drm_i915_gem_pread
*args
= data
;
704 struct drm_i915_gem_object
*obj
;
710 if (!access_ok(VERIFY_WRITE
,
711 to_user_ptr(args
->data_ptr
),
715 ret
= i915_mutex_lock_interruptible(dev
);
719 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
720 if (&obj
->base
== NULL
) {
725 /* Bounds check source. */
726 if (args
->offset
> obj
->base
.size
||
727 args
->size
> obj
->base
.size
- args
->offset
) {
732 /* prime objects have no backing filp to GEM pread/pwrite
735 if (!obj
->base
.filp
) {
740 trace_i915_gem_object_pread(obj
, args
->offset
, args
->size
);
742 ret
= i915_gem_shmem_pread(dev
, obj
, args
, file
);
745 drm_gem_object_unreference(&obj
->base
);
747 mutex_unlock(&dev
->struct_mutex
);
751 /* This is the fast write path which cannot handle
752 * page faults in the source data
756 fast_user_write(struct io_mapping
*mapping
,
757 loff_t page_base
, int page_offset
,
758 char __user
*user_data
,
761 void __iomem
*vaddr_atomic
;
763 unsigned long unwritten
;
765 vaddr_atomic
= io_mapping_map_atomic_wc(mapping
, page_base
);
766 /* We can use the cpu mem copy function because this is X86. */
767 vaddr
= (void __force
*)vaddr_atomic
+ page_offset
;
768 unwritten
= __copy_from_user_inatomic_nocache(vaddr
,
770 io_mapping_unmap_atomic(vaddr_atomic
);
775 * This is the fast pwrite path, where we copy the data directly from the
776 * user into the GTT, uncached.
779 i915_gem_gtt_pwrite_fast(struct drm_device
*dev
,
780 struct drm_i915_gem_object
*obj
,
781 struct drm_i915_gem_pwrite
*args
,
782 struct drm_file
*file
)
784 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
786 loff_t offset
, page_base
;
787 char __user
*user_data
;
788 int page_offset
, page_length
, ret
;
790 ret
= i915_gem_obj_ggtt_pin(obj
, 0, PIN_MAPPABLE
| PIN_NONBLOCK
);
794 ret
= i915_gem_object_set_to_gtt_domain(obj
, true);
798 ret
= i915_gem_object_put_fence(obj
);
802 user_data
= to_user_ptr(args
->data_ptr
);
805 offset
= i915_gem_obj_ggtt_offset(obj
) + args
->offset
;
807 intel_fb_obj_invalidate(obj
, ORIGIN_GTT
);
810 /* Operation in this page
812 * page_base = page offset within aperture
813 * page_offset = offset within page
814 * page_length = bytes to copy for this page
816 page_base
= offset
& PAGE_MASK
;
817 page_offset
= offset_in_page(offset
);
818 page_length
= remain
;
819 if ((page_offset
+ remain
) > PAGE_SIZE
)
820 page_length
= PAGE_SIZE
- page_offset
;
822 /* If we get a fault while copying data, then (presumably) our
823 * source page isn't available. Return the error and we'll
824 * retry in the slow path.
826 if (fast_user_write(dev_priv
->gtt
.mappable
, page_base
,
827 page_offset
, user_data
, page_length
)) {
832 remain
-= page_length
;
833 user_data
+= page_length
;
834 offset
+= page_length
;
838 intel_fb_obj_flush(obj
, false);
840 i915_gem_object_ggtt_unpin(obj
);
845 /* Per-page copy function for the shmem pwrite fastpath.
846 * Flushes invalid cachelines before writing to the target if
847 * needs_clflush_before is set and flushes out any written cachelines after
848 * writing if needs_clflush is set. */
850 shmem_pwrite_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
851 char __user
*user_data
,
852 bool page_do_bit17_swizzling
,
853 bool needs_clflush_before
,
854 bool needs_clflush_after
)
859 if (unlikely(page_do_bit17_swizzling
))
862 vaddr
= kmap_atomic(page
);
863 if (needs_clflush_before
)
864 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
866 ret
= __copy_from_user_inatomic(vaddr
+ shmem_page_offset
,
867 user_data
, page_length
);
868 if (needs_clflush_after
)
869 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
871 kunmap_atomic(vaddr
);
873 return ret
? -EFAULT
: 0;
876 /* Only difference to the fast-path function is that this can handle bit17
877 * and uses non-atomic copy and kmap functions. */
879 shmem_pwrite_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
880 char __user
*user_data
,
881 bool page_do_bit17_swizzling
,
882 bool needs_clflush_before
,
883 bool needs_clflush_after
)
889 if (unlikely(needs_clflush_before
|| page_do_bit17_swizzling
))
890 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
892 page_do_bit17_swizzling
);
893 if (page_do_bit17_swizzling
)
894 ret
= __copy_from_user_swizzled(vaddr
, shmem_page_offset
,
898 ret
= __copy_from_user(vaddr
+ shmem_page_offset
,
901 if (needs_clflush_after
)
902 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
904 page_do_bit17_swizzling
);
907 return ret
? -EFAULT
: 0;
911 i915_gem_shmem_pwrite(struct drm_device
*dev
,
912 struct drm_i915_gem_object
*obj
,
913 struct drm_i915_gem_pwrite
*args
,
914 struct drm_file
*file
)
918 char __user
*user_data
;
919 int shmem_page_offset
, page_length
, ret
= 0;
920 int obj_do_bit17_swizzling
, page_do_bit17_swizzling
;
921 int hit_slowpath
= 0;
922 int needs_clflush_after
= 0;
923 int needs_clflush_before
= 0;
924 struct sg_page_iter sg_iter
;
926 user_data
= to_user_ptr(args
->data_ptr
);
929 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
931 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
932 /* If we're not in the cpu write domain, set ourself into the gtt
933 * write domain and manually flush cachelines (if required). This
934 * optimizes for the case when the gpu will use the data
935 * right away and we therefore have to clflush anyway. */
936 needs_clflush_after
= cpu_write_needs_clflush(obj
);
937 ret
= i915_gem_object_wait_rendering(obj
, false);
941 /* Same trick applies to invalidate partially written cachelines read
943 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
) == 0)
944 needs_clflush_before
=
945 !cpu_cache_is_coherent(dev
, obj
->cache_level
);
947 ret
= i915_gem_object_get_pages(obj
);
951 intel_fb_obj_invalidate(obj
, ORIGIN_CPU
);
953 i915_gem_object_pin_pages(obj
);
955 offset
= args
->offset
;
958 for_each_sg_page(obj
->pages
->sgl
, &sg_iter
, obj
->pages
->nents
,
959 offset
>> PAGE_SHIFT
) {
960 struct page
*page
= sg_page_iter_page(&sg_iter
);
961 int partial_cacheline_write
;
966 /* Operation in this page
968 * shmem_page_offset = offset within page in shmem file
969 * page_length = bytes to copy for this page
971 shmem_page_offset
= offset_in_page(offset
);
973 page_length
= remain
;
974 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
975 page_length
= PAGE_SIZE
- shmem_page_offset
;
977 /* If we don't overwrite a cacheline completely we need to be
978 * careful to have up-to-date data by first clflushing. Don't
979 * overcomplicate things and flush the entire patch. */
980 partial_cacheline_write
= needs_clflush_before
&&
981 ((shmem_page_offset
| page_length
)
982 & (boot_cpu_data
.x86_clflush_size
- 1));
984 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
985 (page_to_phys(page
) & (1 << 17)) != 0;
987 ret
= shmem_pwrite_fast(page
, shmem_page_offset
, page_length
,
988 user_data
, page_do_bit17_swizzling
,
989 partial_cacheline_write
,
990 needs_clflush_after
);
995 mutex_unlock(&dev
->struct_mutex
);
996 ret
= shmem_pwrite_slow(page
, shmem_page_offset
, page_length
,
997 user_data
, page_do_bit17_swizzling
,
998 partial_cacheline_write
,
999 needs_clflush_after
);
1001 mutex_lock(&dev
->struct_mutex
);
1007 remain
-= page_length
;
1008 user_data
+= page_length
;
1009 offset
+= page_length
;
1013 i915_gem_object_unpin_pages(obj
);
1017 * Fixup: Flush cpu caches in case we didn't flush the dirty
1018 * cachelines in-line while writing and the object moved
1019 * out of the cpu write domain while we've dropped the lock.
1021 if (!needs_clflush_after
&&
1022 obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
1023 if (i915_gem_clflush_object(obj
, obj
->pin_display
))
1024 i915_gem_chipset_flush(dev
);
1028 if (needs_clflush_after
)
1029 i915_gem_chipset_flush(dev
);
1031 intel_fb_obj_flush(obj
, false);
1036 * Writes data to the object referenced by handle.
1038 * On error, the contents of the buffer that were to be modified are undefined.
1041 i915_gem_pwrite_ioctl(struct drm_device
*dev
, void *data
,
1042 struct drm_file
*file
)
1044 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1045 struct drm_i915_gem_pwrite
*args
= data
;
1046 struct drm_i915_gem_object
*obj
;
1049 if (args
->size
== 0)
1052 if (!access_ok(VERIFY_READ
,
1053 to_user_ptr(args
->data_ptr
),
1057 if (likely(!i915
.prefault_disable
)) {
1058 ret
= fault_in_multipages_readable(to_user_ptr(args
->data_ptr
),
1064 intel_runtime_pm_get(dev_priv
);
1066 ret
= i915_mutex_lock_interruptible(dev
);
1070 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1071 if (&obj
->base
== NULL
) {
1076 /* Bounds check destination. */
1077 if (args
->offset
> obj
->base
.size
||
1078 args
->size
> obj
->base
.size
- args
->offset
) {
1083 /* prime objects have no backing filp to GEM pread/pwrite
1086 if (!obj
->base
.filp
) {
1091 trace_i915_gem_object_pwrite(obj
, args
->offset
, args
->size
);
1094 /* We can only do the GTT pwrite on untiled buffers, as otherwise
1095 * it would end up going through the fenced access, and we'll get
1096 * different detiling behavior between reading and writing.
1097 * pread/pwrite currently are reading and writing from the CPU
1098 * perspective, requiring manual detiling by the client.
1100 if (obj
->tiling_mode
== I915_TILING_NONE
&&
1101 obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
&&
1102 cpu_write_needs_clflush(obj
)) {
1103 ret
= i915_gem_gtt_pwrite_fast(dev
, obj
, args
, file
);
1104 /* Note that the gtt paths might fail with non-page-backed user
1105 * pointers (e.g. gtt mappings when moving data between
1106 * textures). Fallback to the shmem path in that case. */
1109 if (ret
== -EFAULT
|| ret
== -ENOSPC
) {
1110 if (obj
->phys_handle
)
1111 ret
= i915_gem_phys_pwrite(obj
, args
, file
);
1113 ret
= i915_gem_shmem_pwrite(dev
, obj
, args
, file
);
1117 drm_gem_object_unreference(&obj
->base
);
1119 mutex_unlock(&dev
->struct_mutex
);
1121 intel_runtime_pm_put(dev_priv
);
1127 i915_gem_check_wedge(struct i915_gpu_error
*error
,
1130 if (i915_reset_in_progress(error
)) {
1131 /* Non-interruptible callers can't handle -EAGAIN, hence return
1132 * -EIO unconditionally for these. */
1136 /* Recovery complete, but the reset failed ... */
1137 if (i915_terminally_wedged(error
))
1141 * Check if GPU Reset is in progress - we need intel_ring_begin
1142 * to work properly to reinit the hw state while the gpu is
1143 * still marked as reset-in-progress. Handle this with a flag.
1145 if (!error
->reload_in_reset
)
1153 * Compare arbitrary request against outstanding lazy request. Emit on match.
1156 i915_gem_check_olr(struct drm_i915_gem_request
*req
)
1158 WARN_ON(!mutex_is_locked(&req
->ring
->dev
->struct_mutex
));
1160 if (req
== req
->ring
->outstanding_lazy_request
)
1161 i915_add_request(req
);
1166 static void fake_irq(unsigned long data
)
1168 wake_up_process((struct task_struct
*)data
);
1171 static bool missed_irq(struct drm_i915_private
*dev_priv
,
1172 struct intel_engine_cs
*ring
)
1174 return test_bit(ring
->id
, &dev_priv
->gpu_error
.missed_irq_rings
);
1177 static int __i915_spin_request(struct drm_i915_gem_request
*req
)
1179 unsigned long timeout
;
1181 if (i915_gem_request_get_ring(req
)->irq_refcount
)
1184 timeout
= jiffies
+ 1;
1185 while (!need_resched()) {
1186 if (i915_gem_request_completed(req
, true))
1189 if (time_after_eq(jiffies
, timeout
))
1192 cpu_relax_lowlatency();
1194 if (i915_gem_request_completed(req
, false))
1201 * __i915_wait_request - wait until execution of request has finished
1203 * @reset_counter: reset sequence associated with the given request
1204 * @interruptible: do an interruptible wait (normally yes)
1205 * @timeout: in - how long to wait (NULL forever); out - how much time remaining
1207 * Note: It is of utmost importance that the passed in seqno and reset_counter
1208 * values have been read by the caller in an smp safe manner. Where read-side
1209 * locks are involved, it is sufficient to read the reset_counter before
1210 * unlocking the lock that protects the seqno. For lockless tricks, the
1211 * reset_counter _must_ be read before, and an appropriate smp_rmb must be
1214 * Returns 0 if the request was found within the alloted time. Else returns the
1215 * errno with remaining time filled in timeout argument.
1217 int __i915_wait_request(struct drm_i915_gem_request
*req
,
1218 unsigned reset_counter
,
1221 struct intel_rps_client
*rps
)
1223 struct intel_engine_cs
*ring
= i915_gem_request_get_ring(req
);
1224 struct drm_device
*dev
= ring
->dev
;
1225 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1226 const bool irq_test_in_progress
=
1227 ACCESS_ONCE(dev_priv
->gpu_error
.test_irq_rings
) & intel_ring_flag(ring
);
1229 unsigned long timeout_expire
;
1233 WARN(!intel_irqs_enabled(dev_priv
), "IRQs disabled");
1235 if (list_empty(&req
->list
))
1238 if (i915_gem_request_completed(req
, true))
1241 timeout_expire
= timeout
?
1242 jiffies
+ nsecs_to_jiffies_timeout((u64
)*timeout
) : 0;
1244 if (INTEL_INFO(dev_priv
)->gen
>= 6)
1245 gen6_rps_boost(dev_priv
, rps
, req
->emitted_jiffies
);
1247 /* Record current time in case interrupted by signal, or wedged */
1248 trace_i915_gem_request_wait_begin(req
);
1249 before
= ktime_get_raw_ns();
1251 /* Optimistic spin for the next jiffie before touching IRQs */
1252 ret
= __i915_spin_request(req
);
1256 if (!irq_test_in_progress
&& WARN_ON(!ring
->irq_get(ring
))) {
1262 struct timer_list timer
;
1264 prepare_to_wait(&ring
->irq_queue
, &wait
,
1265 interruptible
? TASK_INTERRUPTIBLE
: TASK_UNINTERRUPTIBLE
);
1267 /* We need to check whether any gpu reset happened in between
1268 * the caller grabbing the seqno and now ... */
1269 if (reset_counter
!= atomic_read(&dev_priv
->gpu_error
.reset_counter
)) {
1270 /* ... but upgrade the -EAGAIN to an -EIO if the gpu
1271 * is truely gone. */
1272 ret
= i915_gem_check_wedge(&dev_priv
->gpu_error
, interruptible
);
1278 if (i915_gem_request_completed(req
, false)) {
1283 if (interruptible
&& signal_pending(current
)) {
1288 if (timeout
&& time_after_eq(jiffies
, timeout_expire
)) {
1293 timer
.function
= NULL
;
1294 if (timeout
|| missed_irq(dev_priv
, ring
)) {
1295 unsigned long expire
;
1297 setup_timer_on_stack(&timer
, fake_irq
, (unsigned long)current
);
1298 expire
= missed_irq(dev_priv
, ring
) ? jiffies
+ 1 : timeout_expire
;
1299 mod_timer(&timer
, expire
);
1304 if (timer
.function
) {
1305 del_singleshot_timer_sync(&timer
);
1306 destroy_timer_on_stack(&timer
);
1309 if (!irq_test_in_progress
)
1310 ring
->irq_put(ring
);
1312 finish_wait(&ring
->irq_queue
, &wait
);
1315 now
= ktime_get_raw_ns();
1316 trace_i915_gem_request_wait_end(req
);
1319 s64 tres
= *timeout
- (now
- before
);
1321 *timeout
= tres
< 0 ? 0 : tres
;
1324 * Apparently ktime isn't accurate enough and occasionally has a
1325 * bit of mismatch in the jiffies<->nsecs<->ktime loop. So patch
1326 * things up to make the test happy. We allow up to 1 jiffy.
1328 * This is a regrssion from the timespec->ktime conversion.
1330 if (ret
== -ETIME
&& *timeout
< jiffies_to_usecs(1)*1000)
1338 i915_gem_request_remove_from_client(struct drm_i915_gem_request
*request
)
1340 struct drm_i915_file_private
*file_priv
= request
->file_priv
;
1345 spin_lock(&file_priv
->mm
.lock
);
1346 list_del(&request
->client_list
);
1347 request
->file_priv
= NULL
;
1348 spin_unlock(&file_priv
->mm
.lock
);
1351 static void i915_gem_request_retire(struct drm_i915_gem_request
*request
)
1353 trace_i915_gem_request_retire(request
);
1355 /* We know the GPU must have read the request to have
1356 * sent us the seqno + interrupt, so use the position
1357 * of tail of the request to update the last known position
1360 * Note this requires that we are always called in request
1363 request
->ringbuf
->last_retired_head
= request
->postfix
;
1365 list_del_init(&request
->list
);
1366 i915_gem_request_remove_from_client(request
);
1368 put_pid(request
->pid
);
1370 i915_gem_request_unreference(request
);
1374 __i915_gem_request_retire__upto(struct drm_i915_gem_request
*req
)
1376 struct intel_engine_cs
*engine
= req
->ring
;
1377 struct drm_i915_gem_request
*tmp
;
1379 lockdep_assert_held(&engine
->dev
->struct_mutex
);
1381 if (list_empty(&req
->list
))
1385 tmp
= list_first_entry(&engine
->request_list
,
1386 typeof(*tmp
), list
);
1388 i915_gem_request_retire(tmp
);
1389 } while (tmp
!= req
);
1391 WARN_ON(i915_verify_lists(engine
->dev
));
1395 * Waits for a request to be signaled, and cleans up the
1396 * request and object lists appropriately for that event.
1399 i915_wait_request(struct drm_i915_gem_request
*req
)
1401 struct drm_device
*dev
;
1402 struct drm_i915_private
*dev_priv
;
1406 BUG_ON(req
== NULL
);
1408 dev
= req
->ring
->dev
;
1409 dev_priv
= dev
->dev_private
;
1410 interruptible
= dev_priv
->mm
.interruptible
;
1412 BUG_ON(!mutex_is_locked(&dev
->struct_mutex
));
1414 ret
= i915_gem_check_wedge(&dev_priv
->gpu_error
, interruptible
);
1418 ret
= i915_gem_check_olr(req
);
1422 ret
= __i915_wait_request(req
,
1423 atomic_read(&dev_priv
->gpu_error
.reset_counter
),
1424 interruptible
, NULL
, NULL
);
1428 __i915_gem_request_retire__upto(req
);
1433 * Ensures that all rendering to the object has completed and the object is
1434 * safe to unbind from the GTT or access from the CPU.
1437 i915_gem_object_wait_rendering(struct drm_i915_gem_object
*obj
,
1446 if (obj
->last_write_req
!= NULL
) {
1447 ret
= i915_wait_request(obj
->last_write_req
);
1451 i
= obj
->last_write_req
->ring
->id
;
1452 if (obj
->last_read_req
[i
] == obj
->last_write_req
)
1453 i915_gem_object_retire__read(obj
, i
);
1455 i915_gem_object_retire__write(obj
);
1458 for (i
= 0; i
< I915_NUM_RINGS
; i
++) {
1459 if (obj
->last_read_req
[i
] == NULL
)
1462 ret
= i915_wait_request(obj
->last_read_req
[i
]);
1466 i915_gem_object_retire__read(obj
, i
);
1468 RQ_BUG_ON(obj
->active
);
1475 i915_gem_object_retire_request(struct drm_i915_gem_object
*obj
,
1476 struct drm_i915_gem_request
*req
)
1478 int ring
= req
->ring
->id
;
1480 if (obj
->last_read_req
[ring
] == req
)
1481 i915_gem_object_retire__read(obj
, ring
);
1482 else if (obj
->last_write_req
== req
)
1483 i915_gem_object_retire__write(obj
);
1485 __i915_gem_request_retire__upto(req
);
1488 /* A nonblocking variant of the above wait. This is a highly dangerous routine
1489 * as the object state may change during this call.
1491 static __must_check
int
1492 i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object
*obj
,
1493 struct intel_rps_client
*rps
,
1496 struct drm_device
*dev
= obj
->base
.dev
;
1497 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1498 struct drm_i915_gem_request
*requests
[I915_NUM_RINGS
];
1499 unsigned reset_counter
;
1502 BUG_ON(!mutex_is_locked(&dev
->struct_mutex
));
1503 BUG_ON(!dev_priv
->mm
.interruptible
);
1508 ret
= i915_gem_check_wedge(&dev_priv
->gpu_error
, true);
1512 reset_counter
= atomic_read(&dev_priv
->gpu_error
.reset_counter
);
1515 struct drm_i915_gem_request
*req
;
1517 req
= obj
->last_write_req
;
1521 ret
= i915_gem_check_olr(req
);
1525 requests
[n
++] = i915_gem_request_reference(req
);
1527 for (i
= 0; i
< I915_NUM_RINGS
; i
++) {
1528 struct drm_i915_gem_request
*req
;
1530 req
= obj
->last_read_req
[i
];
1534 ret
= i915_gem_check_olr(req
);
1538 requests
[n
++] = i915_gem_request_reference(req
);
1542 mutex_unlock(&dev
->struct_mutex
);
1543 for (i
= 0; ret
== 0 && i
< n
; i
++)
1544 ret
= __i915_wait_request(requests
[i
], reset_counter
, true,
1546 mutex_lock(&dev
->struct_mutex
);
1549 for (i
= 0; i
< n
; i
++) {
1551 i915_gem_object_retire_request(obj
, requests
[i
]);
1552 i915_gem_request_unreference(requests
[i
]);
1558 static struct intel_rps_client
*to_rps_client(struct drm_file
*file
)
1560 struct drm_i915_file_private
*fpriv
= file
->driver_priv
;
1565 * Called when user space prepares to use an object with the CPU, either
1566 * through the mmap ioctl's mapping or a GTT mapping.
1569 i915_gem_set_domain_ioctl(struct drm_device
*dev
, void *data
,
1570 struct drm_file
*file
)
1572 struct drm_i915_gem_set_domain
*args
= data
;
1573 struct drm_i915_gem_object
*obj
;
1574 uint32_t read_domains
= args
->read_domains
;
1575 uint32_t write_domain
= args
->write_domain
;
1578 /* Only handle setting domains to types used by the CPU. */
1579 if (write_domain
& I915_GEM_GPU_DOMAINS
)
1582 if (read_domains
& I915_GEM_GPU_DOMAINS
)
1585 /* Having something in the write domain implies it's in the read
1586 * domain, and only that read domain. Enforce that in the request.
1588 if (write_domain
!= 0 && read_domains
!= write_domain
)
1591 ret
= i915_mutex_lock_interruptible(dev
);
1595 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1596 if (&obj
->base
== NULL
) {
1601 /* Try to flush the object off the GPU without holding the lock.
1602 * We will repeat the flush holding the lock in the normal manner
1603 * to catch cases where we are gazumped.
1605 ret
= i915_gem_object_wait_rendering__nonblocking(obj
,
1606 to_rps_client(file
),
1611 if (read_domains
& I915_GEM_DOMAIN_GTT
)
1612 ret
= i915_gem_object_set_to_gtt_domain(obj
, write_domain
!= 0);
1614 ret
= i915_gem_object_set_to_cpu_domain(obj
, write_domain
!= 0);
1617 drm_gem_object_unreference(&obj
->base
);
1619 mutex_unlock(&dev
->struct_mutex
);
1624 * Called when user space has done writes to this buffer
1627 i915_gem_sw_finish_ioctl(struct drm_device
*dev
, void *data
,
1628 struct drm_file
*file
)
1630 struct drm_i915_gem_sw_finish
*args
= data
;
1631 struct drm_i915_gem_object
*obj
;
1634 ret
= i915_mutex_lock_interruptible(dev
);
1638 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1639 if (&obj
->base
== NULL
) {
1644 /* Pinned buffers may be scanout, so flush the cache */
1645 if (obj
->pin_display
)
1646 i915_gem_object_flush_cpu_write_domain(obj
);
1648 drm_gem_object_unreference(&obj
->base
);
1650 mutex_unlock(&dev
->struct_mutex
);
1655 * Maps the contents of an object, returning the address it is mapped
1658 * While the mapping holds a reference on the contents of the object, it doesn't
1659 * imply a ref on the object itself.
1663 * DRM driver writers who look a this function as an example for how to do GEM
1664 * mmap support, please don't implement mmap support like here. The modern way
1665 * to implement DRM mmap support is with an mmap offset ioctl (like
1666 * i915_gem_mmap_gtt) and then using the mmap syscall on the DRM fd directly.
1667 * That way debug tooling like valgrind will understand what's going on, hiding
1668 * the mmap call in a driver private ioctl will break that. The i915 driver only
1669 * does cpu mmaps this way because we didn't know better.
1672 i915_gem_mmap_ioctl(struct drm_device
*dev
, void *data
,
1673 struct drm_file
*file
)
1675 struct drm_i915_gem_mmap
*args
= data
;
1676 struct drm_gem_object
*obj
;
1679 if (args
->flags
& ~(I915_MMAP_WC
))
1682 if (args
->flags
& I915_MMAP_WC
&& !cpu_has_pat
)
1685 obj
= drm_gem_object_lookup(dev
, file
, args
->handle
);
1689 /* prime objects have no backing filp to GEM mmap
1693 drm_gem_object_unreference_unlocked(obj
);
1697 addr
= vm_mmap(obj
->filp
, 0, args
->size
,
1698 PROT_READ
| PROT_WRITE
, MAP_SHARED
,
1700 if (args
->flags
& I915_MMAP_WC
) {
1701 struct mm_struct
*mm
= current
->mm
;
1702 struct vm_area_struct
*vma
;
1704 down_write(&mm
->mmap_sem
);
1705 vma
= find_vma(mm
, addr
);
1708 pgprot_writecombine(vm_get_page_prot(vma
->vm_flags
));
1711 up_write(&mm
->mmap_sem
);
1713 drm_gem_object_unreference_unlocked(obj
);
1714 if (IS_ERR((void *)addr
))
1717 args
->addr_ptr
= (uint64_t) addr
;
1723 * i915_gem_fault - fault a page into the GTT
1724 * vma: VMA in question
1727 * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped
1728 * from userspace. The fault handler takes care of binding the object to
1729 * the GTT (if needed), allocating and programming a fence register (again,
1730 * only if needed based on whether the old reg is still valid or the object
1731 * is tiled) and inserting a new PTE into the faulting process.
1733 * Note that the faulting process may involve evicting existing objects
1734 * from the GTT and/or fence registers to make room. So performance may
1735 * suffer if the GTT working set is large or there are few fence registers
1738 int i915_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
1740 struct drm_i915_gem_object
*obj
= to_intel_bo(vma
->vm_private_data
);
1741 struct drm_device
*dev
= obj
->base
.dev
;
1742 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1743 struct i915_ggtt_view view
= i915_ggtt_view_normal
;
1744 pgoff_t page_offset
;
1747 bool write
= !!(vmf
->flags
& FAULT_FLAG_WRITE
);
1749 intel_runtime_pm_get(dev_priv
);
1751 /* We don't use vmf->pgoff since that has the fake offset */
1752 page_offset
= ((unsigned long)vmf
->virtual_address
- vma
->vm_start
) >>
1755 ret
= i915_mutex_lock_interruptible(dev
);
1759 trace_i915_gem_object_fault(obj
, page_offset
, true, write
);
1761 /* Try to flush the object off the GPU first without holding the lock.
1762 * Upon reacquiring the lock, we will perform our sanity checks and then
1763 * repeat the flush holding the lock in the normal manner to catch cases
1764 * where we are gazumped.
1766 ret
= i915_gem_object_wait_rendering__nonblocking(obj
, NULL
, !write
);
1770 /* Access to snoopable pages through the GTT is incoherent. */
1771 if (obj
->cache_level
!= I915_CACHE_NONE
&& !HAS_LLC(dev
)) {
1776 /* Use a partial view if the object is bigger than the aperture. */
1777 if (obj
->base
.size
>= dev_priv
->gtt
.mappable_end
&&
1778 obj
->tiling_mode
== I915_TILING_NONE
) {
1779 static const unsigned int chunk_size
= 256; // 1 MiB
1781 memset(&view
, 0, sizeof(view
));
1782 view
.type
= I915_GGTT_VIEW_PARTIAL
;
1783 view
.params
.partial
.offset
= rounddown(page_offset
, chunk_size
);
1784 view
.params
.partial
.size
=
1787 (vma
->vm_end
- vma
->vm_start
)/PAGE_SIZE
-
1788 view
.params
.partial
.offset
);
1791 /* Now pin it into the GTT if needed */
1792 ret
= i915_gem_object_ggtt_pin(obj
, &view
, 0, PIN_MAPPABLE
);
1796 ret
= i915_gem_object_set_to_gtt_domain(obj
, write
);
1800 ret
= i915_gem_object_get_fence(obj
);
1804 /* Finally, remap it using the new GTT offset */
1805 pfn
= dev_priv
->gtt
.mappable_base
+
1806 i915_gem_obj_ggtt_offset_view(obj
, &view
);
1809 if (unlikely(view
.type
== I915_GGTT_VIEW_PARTIAL
)) {
1810 /* Overriding existing pages in partial view does not cause
1811 * us any trouble as TLBs are still valid because the fault
1812 * is due to userspace losing part of the mapping or never
1813 * having accessed it before (at this partials' range).
1815 unsigned long base
= vma
->vm_start
+
1816 (view
.params
.partial
.offset
<< PAGE_SHIFT
);
1819 for (i
= 0; i
< view
.params
.partial
.size
; i
++) {
1820 ret
= vm_insert_pfn(vma
, base
+ i
* PAGE_SIZE
, pfn
+ i
);
1825 obj
->fault_mappable
= true;
1827 if (!obj
->fault_mappable
) {
1828 unsigned long size
= min_t(unsigned long,
1829 vma
->vm_end
- vma
->vm_start
,
1833 for (i
= 0; i
< size
>> PAGE_SHIFT
; i
++) {
1834 ret
= vm_insert_pfn(vma
,
1835 (unsigned long)vma
->vm_start
+ i
* PAGE_SIZE
,
1841 obj
->fault_mappable
= true;
1843 ret
= vm_insert_pfn(vma
,
1844 (unsigned long)vmf
->virtual_address
,
1848 i915_gem_object_ggtt_unpin_view(obj
, &view
);
1850 mutex_unlock(&dev
->struct_mutex
);
1855 * We eat errors when the gpu is terminally wedged to avoid
1856 * userspace unduly crashing (gl has no provisions for mmaps to
1857 * fail). But any other -EIO isn't ours (e.g. swap in failure)
1858 * and so needs to be reported.
1860 if (!i915_terminally_wedged(&dev_priv
->gpu_error
)) {
1861 ret
= VM_FAULT_SIGBUS
;
1866 * EAGAIN means the gpu is hung and we'll wait for the error
1867 * handler to reset everything when re-faulting in
1868 * i915_mutex_lock_interruptible.
1875 * EBUSY is ok: this just means that another thread
1876 * already did the job.
1878 ret
= VM_FAULT_NOPAGE
;
1885 ret
= VM_FAULT_SIGBUS
;
1888 WARN_ONCE(ret
, "unhandled error in i915_gem_fault: %i\n", ret
);
1889 ret
= VM_FAULT_SIGBUS
;
1893 intel_runtime_pm_put(dev_priv
);
1898 * i915_gem_release_mmap - remove physical page mappings
1899 * @obj: obj in question
1901 * Preserve the reservation of the mmapping with the DRM core code, but
1902 * relinquish ownership of the pages back to the system.
1904 * It is vital that we remove the page mapping if we have mapped a tiled
1905 * object through the GTT and then lose the fence register due to
1906 * resource pressure. Similarly if the object has been moved out of the
1907 * aperture, than pages mapped into userspace must be revoked. Removing the
1908 * mapping will then trigger a page fault on the next user access, allowing
1909 * fixup by i915_gem_fault().
1912 i915_gem_release_mmap(struct drm_i915_gem_object
*obj
)
1914 if (!obj
->fault_mappable
)
1917 drm_vma_node_unmap(&obj
->base
.vma_node
,
1918 obj
->base
.dev
->anon_inode
->i_mapping
);
1919 obj
->fault_mappable
= false;
1923 i915_gem_release_all_mmaps(struct drm_i915_private
*dev_priv
)
1925 struct drm_i915_gem_object
*obj
;
1927 list_for_each_entry(obj
, &dev_priv
->mm
.bound_list
, global_list
)
1928 i915_gem_release_mmap(obj
);
1932 i915_gem_get_gtt_size(struct drm_device
*dev
, uint32_t size
, int tiling_mode
)
1936 if (INTEL_INFO(dev
)->gen
>= 4 ||
1937 tiling_mode
== I915_TILING_NONE
)
1940 /* Previous chips need a power-of-two fence region when tiling */
1941 if (INTEL_INFO(dev
)->gen
== 3)
1942 gtt_size
= 1024*1024;
1944 gtt_size
= 512*1024;
1946 while (gtt_size
< size
)
1953 * i915_gem_get_gtt_alignment - return required GTT alignment for an object
1954 * @obj: object to check
1956 * Return the required GTT alignment for an object, taking into account
1957 * potential fence register mapping.
1960 i915_gem_get_gtt_alignment(struct drm_device
*dev
, uint32_t size
,
1961 int tiling_mode
, bool fenced
)
1964 * Minimum alignment is 4k (GTT page size), but might be greater
1965 * if a fence register is needed for the object.
1967 if (INTEL_INFO(dev
)->gen
>= 4 || (!fenced
&& IS_G33(dev
)) ||
1968 tiling_mode
== I915_TILING_NONE
)
1972 * Previous chips need to be aligned to the size of the smallest
1973 * fence register that can contain the object.
1975 return i915_gem_get_gtt_size(dev
, size
, tiling_mode
);
1978 static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object
*obj
)
1980 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
1983 if (drm_vma_node_has_offset(&obj
->base
.vma_node
))
1986 dev_priv
->mm
.shrinker_no_lock_stealing
= true;
1988 ret
= drm_gem_create_mmap_offset(&obj
->base
);
1992 /* Badly fragmented mmap space? The only way we can recover
1993 * space is by destroying unwanted objects. We can't randomly release
1994 * mmap_offsets as userspace expects them to be persistent for the
1995 * lifetime of the objects. The closest we can is to release the
1996 * offsets on purgeable objects by truncating it and marking it purged,
1997 * which prevents userspace from ever using that object again.
1999 i915_gem_shrink(dev_priv
,
2000 obj
->base
.size
>> PAGE_SHIFT
,
2002 I915_SHRINK_UNBOUND
|
2003 I915_SHRINK_PURGEABLE
);
2004 ret
= drm_gem_create_mmap_offset(&obj
->base
);
2008 i915_gem_shrink_all(dev_priv
);
2009 ret
= drm_gem_create_mmap_offset(&obj
->base
);
2011 dev_priv
->mm
.shrinker_no_lock_stealing
= false;
2016 static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object
*obj
)
2018 drm_gem_free_mmap_offset(&obj
->base
);
2022 i915_gem_mmap_gtt(struct drm_file
*file
,
2023 struct drm_device
*dev
,
2027 struct drm_i915_gem_object
*obj
;
2030 ret
= i915_mutex_lock_interruptible(dev
);
2034 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, handle
));
2035 if (&obj
->base
== NULL
) {
2040 if (obj
->madv
!= I915_MADV_WILLNEED
) {
2041 DRM_DEBUG("Attempting to mmap a purgeable buffer\n");
2046 ret
= i915_gem_object_create_mmap_offset(obj
);
2050 *offset
= drm_vma_node_offset_addr(&obj
->base
.vma_node
);
2053 drm_gem_object_unreference(&obj
->base
);
2055 mutex_unlock(&dev
->struct_mutex
);
2060 * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing
2062 * @data: GTT mapping ioctl data
2063 * @file: GEM object info
2065 * Simply returns the fake offset to userspace so it can mmap it.
2066 * The mmap call will end up in drm_gem_mmap(), which will set things
2067 * up so we can get faults in the handler above.
2069 * The fault handler will take care of binding the object into the GTT
2070 * (since it may have been evicted to make room for something), allocating
2071 * a fence register, and mapping the appropriate aperture address into
2075 i915_gem_mmap_gtt_ioctl(struct drm_device
*dev
, void *data
,
2076 struct drm_file
*file
)
2078 struct drm_i915_gem_mmap_gtt
*args
= data
;
2080 return i915_gem_mmap_gtt(file
, dev
, args
->handle
, &args
->offset
);
2083 /* Immediately discard the backing storage */
2085 i915_gem_object_truncate(struct drm_i915_gem_object
*obj
)
2087 i915_gem_object_free_mmap_offset(obj
);
2089 if (obj
->base
.filp
== NULL
)
2092 /* Our goal here is to return as much of the memory as
2093 * is possible back to the system as we are called from OOM.
2094 * To do this we must instruct the shmfs to drop all of its
2095 * backing pages, *now*.
2097 shmem_truncate_range(file_inode(obj
->base
.filp
), 0, (loff_t
)-1);
2098 obj
->madv
= __I915_MADV_PURGED
;
2101 /* Try to discard unwanted pages */
2103 i915_gem_object_invalidate(struct drm_i915_gem_object
*obj
)
2105 struct address_space
*mapping
;
2107 switch (obj
->madv
) {
2108 case I915_MADV_DONTNEED
:
2109 i915_gem_object_truncate(obj
);
2110 case __I915_MADV_PURGED
:
2114 if (obj
->base
.filp
== NULL
)
2117 mapping
= file_inode(obj
->base
.filp
)->i_mapping
,
2118 invalidate_mapping_pages(mapping
, 0, (loff_t
)-1);
2122 i915_gem_object_put_pages_gtt(struct drm_i915_gem_object
*obj
)
2124 struct sg_page_iter sg_iter
;
2127 BUG_ON(obj
->madv
== __I915_MADV_PURGED
);
2129 ret
= i915_gem_object_set_to_cpu_domain(obj
, true);
2131 /* In the event of a disaster, abandon all caches and
2132 * hope for the best.
2134 WARN_ON(ret
!= -EIO
);
2135 i915_gem_clflush_object(obj
, true);
2136 obj
->base
.read_domains
= obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
2139 if (i915_gem_object_needs_bit17_swizzle(obj
))
2140 i915_gem_object_save_bit_17_swizzle(obj
);
2142 if (obj
->madv
== I915_MADV_DONTNEED
)
2145 for_each_sg_page(obj
->pages
->sgl
, &sg_iter
, obj
->pages
->nents
, 0) {
2146 struct page
*page
= sg_page_iter_page(&sg_iter
);
2149 set_page_dirty(page
);
2151 if (obj
->madv
== I915_MADV_WILLNEED
)
2152 mark_page_accessed(page
);
2154 page_cache_release(page
);
2158 sg_free_table(obj
->pages
);
2163 i915_gem_object_put_pages(struct drm_i915_gem_object
*obj
)
2165 const struct drm_i915_gem_object_ops
*ops
= obj
->ops
;
2167 if (obj
->pages
== NULL
)
2170 if (obj
->pages_pin_count
)
2173 BUG_ON(i915_gem_obj_bound_any(obj
));
2175 /* ->put_pages might need to allocate memory for the bit17 swizzle
2176 * array, hence protect them from being reaped by removing them from gtt
2178 list_del(&obj
->global_list
);
2180 ops
->put_pages(obj
);
2183 i915_gem_object_invalidate(obj
);
2189 i915_gem_object_get_pages_gtt(struct drm_i915_gem_object
*obj
)
2191 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2193 struct address_space
*mapping
;
2194 struct sg_table
*st
;
2195 struct scatterlist
*sg
;
2196 struct sg_page_iter sg_iter
;
2198 unsigned long last_pfn
= 0; /* suppress gcc warning */
2201 /* Assert that the object is not currently in any GPU domain. As it
2202 * wasn't in the GTT, there shouldn't be any way it could have been in
2205 BUG_ON(obj
->base
.read_domains
& I915_GEM_GPU_DOMAINS
);
2206 BUG_ON(obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
);
2208 st
= kmalloc(sizeof(*st
), GFP_KERNEL
);
2212 page_count
= obj
->base
.size
/ PAGE_SIZE
;
2213 if (sg_alloc_table(st
, page_count
, GFP_KERNEL
)) {
2218 /* Get the list of pages out of our struct file. They'll be pinned
2219 * at this point until we release them.
2221 * Fail silently without starting the shrinker
2223 mapping
= file_inode(obj
->base
.filp
)->i_mapping
;
2224 gfp
= mapping_gfp_mask(mapping
);
2225 gfp
|= __GFP_NORETRY
| __GFP_NOWARN
| __GFP_NO_KSWAPD
;
2226 gfp
&= ~(__GFP_IO
| __GFP_WAIT
);
2229 for (i
= 0; i
< page_count
; i
++) {
2230 page
= shmem_read_mapping_page_gfp(mapping
, i
, gfp
);
2232 i915_gem_shrink(dev_priv
,
2235 I915_SHRINK_UNBOUND
|
2236 I915_SHRINK_PURGEABLE
);
2237 page
= shmem_read_mapping_page_gfp(mapping
, i
, gfp
);
2240 /* We've tried hard to allocate the memory by reaping
2241 * our own buffer, now let the real VM do its job and
2242 * go down in flames if truly OOM.
2244 i915_gem_shrink_all(dev_priv
);
2245 page
= shmem_read_mapping_page(mapping
, i
);
2249 #ifdef CONFIG_SWIOTLB
2250 if (swiotlb_nr_tbl()) {
2252 sg_set_page(sg
, page
, PAGE_SIZE
, 0);
2257 if (!i
|| page_to_pfn(page
) != last_pfn
+ 1) {
2261 sg_set_page(sg
, page
, PAGE_SIZE
, 0);
2263 sg
->length
+= PAGE_SIZE
;
2265 last_pfn
= page_to_pfn(page
);
2267 /* Check that the i965g/gm workaround works. */
2268 WARN_ON((gfp
& __GFP_DMA32
) && (last_pfn
>= 0x00100000UL
));
2270 #ifdef CONFIG_SWIOTLB
2271 if (!swiotlb_nr_tbl())
2276 if (i915_gem_object_needs_bit17_swizzle(obj
))
2277 i915_gem_object_do_bit_17_swizzle(obj
);
2279 if (obj
->tiling_mode
!= I915_TILING_NONE
&&
2280 dev_priv
->quirks
& QUIRK_PIN_SWIZZLED_PAGES
)
2281 i915_gem_object_pin_pages(obj
);
2287 for_each_sg_page(st
->sgl
, &sg_iter
, st
->nents
, 0)
2288 page_cache_release(sg_page_iter_page(&sg_iter
));
2292 /* shmemfs first checks if there is enough memory to allocate the page
2293 * and reports ENOSPC should there be insufficient, along with the usual
2294 * ENOMEM for a genuine allocation failure.
2296 * We use ENOSPC in our driver to mean that we have run out of aperture
2297 * space and so want to translate the error from shmemfs back to our
2298 * usual understanding of ENOMEM.
2300 if (PTR_ERR(page
) == -ENOSPC
)
2303 return PTR_ERR(page
);
2306 /* Ensure that the associated pages are gathered from the backing storage
2307 * and pinned into our object. i915_gem_object_get_pages() may be called
2308 * multiple times before they are released by a single call to
2309 * i915_gem_object_put_pages() - once the pages are no longer referenced
2310 * either as a result of memory pressure (reaping pages under the shrinker)
2311 * or as the object is itself released.
2314 i915_gem_object_get_pages(struct drm_i915_gem_object
*obj
)
2316 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2317 const struct drm_i915_gem_object_ops
*ops
= obj
->ops
;
2323 if (obj
->madv
!= I915_MADV_WILLNEED
) {
2324 DRM_DEBUG("Attempting to obtain a purgeable object\n");
2328 BUG_ON(obj
->pages_pin_count
);
2330 ret
= ops
->get_pages(obj
);
2334 list_add_tail(&obj
->global_list
, &dev_priv
->mm
.unbound_list
);
2336 obj
->get_page
.sg
= obj
->pages
->sgl
;
2337 obj
->get_page
.last
= 0;
2342 void i915_vma_move_to_active(struct i915_vma
*vma
,
2343 struct drm_i915_gem_request
*req
)
2345 struct drm_i915_gem_object
*obj
= vma
->obj
;
2346 struct intel_engine_cs
*ring
;
2348 ring
= i915_gem_request_get_ring(req
);
2350 /* Add a reference if we're newly entering the active list. */
2351 if (obj
->active
== 0)
2352 drm_gem_object_reference(&obj
->base
);
2353 obj
->active
|= intel_ring_flag(ring
);
2355 list_move_tail(&obj
->ring_list
[ring
->id
], &ring
->active_list
);
2356 i915_gem_request_assign(&obj
->last_read_req
[ring
->id
], req
);
2358 list_move_tail(&vma
->mm_list
, &vma
->vm
->active_list
);
2362 i915_gem_object_retire__write(struct drm_i915_gem_object
*obj
)
2364 RQ_BUG_ON(obj
->last_write_req
== NULL
);
2365 RQ_BUG_ON(!(obj
->active
& intel_ring_flag(obj
->last_write_req
->ring
)));
2367 i915_gem_request_assign(&obj
->last_write_req
, NULL
);
2368 intel_fb_obj_flush(obj
, true);
2372 i915_gem_object_retire__read(struct drm_i915_gem_object
*obj
, int ring
)
2374 struct i915_vma
*vma
;
2376 RQ_BUG_ON(obj
->last_read_req
[ring
] == NULL
);
2377 RQ_BUG_ON(!(obj
->active
& (1 << ring
)));
2379 list_del_init(&obj
->ring_list
[ring
]);
2380 i915_gem_request_assign(&obj
->last_read_req
[ring
], NULL
);
2382 if (obj
->last_write_req
&& obj
->last_write_req
->ring
->id
== ring
)
2383 i915_gem_object_retire__write(obj
);
2385 obj
->active
&= ~(1 << ring
);
2389 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
) {
2390 if (!list_empty(&vma
->mm_list
))
2391 list_move_tail(&vma
->mm_list
, &vma
->vm
->inactive_list
);
2394 i915_gem_request_assign(&obj
->last_fenced_req
, NULL
);
2395 drm_gem_object_unreference(&obj
->base
);
2399 i915_gem_init_seqno(struct drm_device
*dev
, u32 seqno
)
2401 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2402 struct intel_engine_cs
*ring
;
2405 /* Carefully retire all requests without writing to the rings */
2406 for_each_ring(ring
, dev_priv
, i
) {
2407 ret
= intel_ring_idle(ring
);
2411 i915_gem_retire_requests(dev
);
2413 /* Finally reset hw state */
2414 for_each_ring(ring
, dev_priv
, i
) {
2415 intel_ring_init_seqno(ring
, seqno
);
2417 for (j
= 0; j
< ARRAY_SIZE(ring
->semaphore
.sync_seqno
); j
++)
2418 ring
->semaphore
.sync_seqno
[j
] = 0;
2424 int i915_gem_set_seqno(struct drm_device
*dev
, u32 seqno
)
2426 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2432 /* HWS page needs to be set less than what we
2433 * will inject to ring
2435 ret
= i915_gem_init_seqno(dev
, seqno
- 1);
2439 /* Carefully set the last_seqno value so that wrap
2440 * detection still works
2442 dev_priv
->next_seqno
= seqno
;
2443 dev_priv
->last_seqno
= seqno
- 1;
2444 if (dev_priv
->last_seqno
== 0)
2445 dev_priv
->last_seqno
--;
2451 i915_gem_get_seqno(struct drm_device
*dev
, u32
*seqno
)
2453 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2455 /* reserve 0 for non-seqno */
2456 if (dev_priv
->next_seqno
== 0) {
2457 int ret
= i915_gem_init_seqno(dev
, 0);
2461 dev_priv
->next_seqno
= 1;
2464 *seqno
= dev_priv
->last_seqno
= dev_priv
->next_seqno
++;
2469 * NB: This function is not allowed to fail. Doing so would mean the the
2470 * request is not being tracked for completion but the work itself is
2471 * going to happen on the hardware. This would be a Bad Thing(tm).
2473 void __i915_add_request(struct drm_i915_gem_request
*request
,
2474 struct drm_file
*file
,
2475 struct drm_i915_gem_object
*obj
,
2478 struct intel_engine_cs
*ring
;
2479 struct drm_i915_private
*dev_priv
;
2480 struct intel_ringbuffer
*ringbuf
;
2484 if (WARN_ON(request
== NULL
))
2487 ring
= request
->ring
;
2488 dev_priv
= ring
->dev
->dev_private
;
2489 ringbuf
= request
->ringbuf
;
2491 WARN_ON(request
!= ring
->outstanding_lazy_request
);
2494 * To ensure that this call will not fail, space for its emissions
2495 * should already have been reserved in the ring buffer. Let the ring
2496 * know that it is time to use that space up.
2498 intel_ring_reserved_space_use(ringbuf
);
2500 request_start
= intel_ring_get_tail(ringbuf
);
2502 * Emit any outstanding flushes - execbuf can fail to emit the flush
2503 * after having emitted the batchbuffer command. Hence we need to fix
2504 * things up similar to emitting the lazy request. The difference here
2505 * is that the flush _must_ happen before the next request, no matter
2509 if (i915
.enable_execlists
)
2510 ret
= logical_ring_flush_all_caches(request
);
2512 ret
= intel_ring_flush_all_caches(request
);
2513 /* Not allowed to fail! */
2514 WARN(ret
, "*_ring_flush_all_caches failed: %d!\n", ret
);
2517 /* Record the position of the start of the request so that
2518 * should we detect the updated seqno part-way through the
2519 * GPU processing the request, we never over-estimate the
2520 * position of the head.
2522 request
->postfix
= intel_ring_get_tail(ringbuf
);
2524 if (i915
.enable_execlists
)
2525 ret
= ring
->emit_request(request
);
2527 ret
= ring
->add_request(request
);
2529 request
->tail
= intel_ring_get_tail(ringbuf
);
2531 /* Not allowed to fail! */
2532 WARN(ret
, "emit|add_request failed: %d!\n", ret
);
2534 request
->head
= request_start
;
2536 /* Whilst this request exists, batch_obj will be on the
2537 * active_list, and so will hold the active reference. Only when this
2538 * request is retired will the the batch_obj be moved onto the
2539 * inactive_list and lose its active reference. Hence we do not need
2540 * to explicitly hold another reference here.
2542 request
->batch_obj
= obj
;
2544 request
->emitted_jiffies
= jiffies
;
2545 list_add_tail(&request
->list
, &ring
->request_list
);
2546 request
->file_priv
= NULL
;
2549 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
2551 spin_lock(&file_priv
->mm
.lock
);
2552 request
->file_priv
= file_priv
;
2553 list_add_tail(&request
->client_list
,
2554 &file_priv
->mm
.request_list
);
2555 spin_unlock(&file_priv
->mm
.lock
);
2557 request
->pid
= get_pid(task_pid(current
));
2560 trace_i915_gem_request_add(request
);
2561 ring
->outstanding_lazy_request
= NULL
;
2563 i915_queue_hangcheck(ring
->dev
);
2565 queue_delayed_work(dev_priv
->wq
,
2566 &dev_priv
->mm
.retire_work
,
2567 round_jiffies_up_relative(HZ
));
2568 intel_mark_busy(dev_priv
->dev
);
2570 /* Sanity check that the reserved size was large enough. */
2571 intel_ring_reserved_space_end(ringbuf
);
2574 static bool i915_context_is_banned(struct drm_i915_private
*dev_priv
,
2575 const struct intel_context
*ctx
)
2577 unsigned long elapsed
;
2579 elapsed
= get_seconds() - ctx
->hang_stats
.guilty_ts
;
2581 if (ctx
->hang_stats
.banned
)
2584 if (ctx
->hang_stats
.ban_period_seconds
&&
2585 elapsed
<= ctx
->hang_stats
.ban_period_seconds
) {
2586 if (!i915_gem_context_is_default(ctx
)) {
2587 DRM_DEBUG("context hanging too fast, banning!\n");
2589 } else if (i915_stop_ring_allow_ban(dev_priv
)) {
2590 if (i915_stop_ring_allow_warn(dev_priv
))
2591 DRM_ERROR("gpu hanging too fast, banning!\n");
2599 static void i915_set_reset_status(struct drm_i915_private
*dev_priv
,
2600 struct intel_context
*ctx
,
2603 struct i915_ctx_hang_stats
*hs
;
2608 hs
= &ctx
->hang_stats
;
2611 hs
->banned
= i915_context_is_banned(dev_priv
, ctx
);
2613 hs
->guilty_ts
= get_seconds();
2615 hs
->batch_pending
++;
2619 void i915_gem_request_free(struct kref
*req_ref
)
2621 struct drm_i915_gem_request
*req
= container_of(req_ref
,
2623 struct intel_context
*ctx
= req
->ctx
;
2626 if (i915
.enable_execlists
) {
2627 struct intel_engine_cs
*ring
= req
->ring
;
2629 if (ctx
!= ring
->default_context
)
2630 intel_lr_context_unpin(ring
, ctx
);
2633 i915_gem_context_unreference(ctx
);
2636 kmem_cache_free(req
->i915
->requests
, req
);
2639 int i915_gem_request_alloc(struct intel_engine_cs
*ring
,
2640 struct intel_context
*ctx
,
2641 struct drm_i915_gem_request
**req_out
)
2643 struct drm_i915_private
*dev_priv
= to_i915(ring
->dev
);
2644 struct drm_i915_gem_request
*req
;
2650 if ((*req_out
= ring
->outstanding_lazy_request
) != NULL
)
2653 req
= kmem_cache_zalloc(dev_priv
->requests
, GFP_KERNEL
);
2657 ret
= i915_gem_get_seqno(ring
->dev
, &req
->seqno
);
2661 kref_init(&req
->ref
);
2662 req
->i915
= dev_priv
;
2665 i915_gem_context_reference(req
->ctx
);
2667 if (i915
.enable_execlists
)
2668 ret
= intel_logical_ring_alloc_request_extras(req
);
2670 ret
= intel_ring_alloc_request_extras(req
);
2672 i915_gem_context_unreference(req
->ctx
);
2677 * Reserve space in the ring buffer for all the commands required to
2678 * eventually emit this request. This is to guarantee that the
2679 * i915_add_request() call can't fail. Note that the reserve may need
2680 * to be redone if the request is not actually submitted straight
2681 * away, e.g. because a GPU scheduler has deferred it.
2683 * Note further that this call merely notes the reserve request. A
2684 * subsequent call to *_ring_begin() is required to actually ensure
2685 * that the reservation is available. Without the begin, if the
2686 * request creator immediately submitted the request without adding
2687 * any commands to it then there might not actually be sufficient
2688 * room for the submission commands. Unfortunately, the current
2689 * *_ring_begin() implementations potentially call back here to
2690 * i915_gem_request_alloc(). Thus calling _begin() here would lead to
2691 * infinite recursion! Until that back call path is removed, it is
2692 * necessary to do a manual _begin() outside.
2694 intel_ring_reserved_space_reserve(req
->ringbuf
, MIN_SPACE_FOR_ADD_REQUEST
);
2696 *req_out
= ring
->outstanding_lazy_request
= req
;
2700 kmem_cache_free(dev_priv
->requests
, req
);
2704 void i915_gem_request_cancel(struct drm_i915_gem_request
*req
)
2706 intel_ring_reserved_space_cancel(req
->ringbuf
);
2708 i915_gem_request_unreference(req
);
2711 struct drm_i915_gem_request
*
2712 i915_gem_find_active_request(struct intel_engine_cs
*ring
)
2714 struct drm_i915_gem_request
*request
;
2716 list_for_each_entry(request
, &ring
->request_list
, list
) {
2717 if (i915_gem_request_completed(request
, false))
2726 static void i915_gem_reset_ring_status(struct drm_i915_private
*dev_priv
,
2727 struct intel_engine_cs
*ring
)
2729 struct drm_i915_gem_request
*request
;
2732 request
= i915_gem_find_active_request(ring
);
2734 if (request
== NULL
)
2737 ring_hung
= ring
->hangcheck
.score
>= HANGCHECK_SCORE_RING_HUNG
;
2739 i915_set_reset_status(dev_priv
, request
->ctx
, ring_hung
);
2741 list_for_each_entry_continue(request
, &ring
->request_list
, list
)
2742 i915_set_reset_status(dev_priv
, request
->ctx
, false);
2745 static void i915_gem_reset_ring_cleanup(struct drm_i915_private
*dev_priv
,
2746 struct intel_engine_cs
*ring
)
2748 while (!list_empty(&ring
->active_list
)) {
2749 struct drm_i915_gem_object
*obj
;
2751 obj
= list_first_entry(&ring
->active_list
,
2752 struct drm_i915_gem_object
,
2753 ring_list
[ring
->id
]);
2755 i915_gem_object_retire__read(obj
, ring
->id
);
2759 * Clear the execlists queue up before freeing the requests, as those
2760 * are the ones that keep the context and ringbuffer backing objects
2763 while (!list_empty(&ring
->execlist_queue
)) {
2764 struct drm_i915_gem_request
*submit_req
;
2766 submit_req
= list_first_entry(&ring
->execlist_queue
,
2767 struct drm_i915_gem_request
,
2769 list_del(&submit_req
->execlist_link
);
2771 if (submit_req
->ctx
!= ring
->default_context
)
2772 intel_lr_context_unpin(ring
, submit_req
->ctx
);
2774 i915_gem_request_unreference(submit_req
);
2778 * We must free the requests after all the corresponding objects have
2779 * been moved off active lists. Which is the same order as the normal
2780 * retire_requests function does. This is important if object hold
2781 * implicit references on things like e.g. ppgtt address spaces through
2784 while (!list_empty(&ring
->request_list
)) {
2785 struct drm_i915_gem_request
*request
;
2787 request
= list_first_entry(&ring
->request_list
,
2788 struct drm_i915_gem_request
,
2791 i915_gem_request_retire(request
);
2794 /* This may not have been flushed before the reset, so clean it now */
2795 i915_gem_request_assign(&ring
->outstanding_lazy_request
, NULL
);
2798 void i915_gem_restore_fences(struct drm_device
*dev
)
2800 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2803 for (i
= 0; i
< dev_priv
->num_fence_regs
; i
++) {
2804 struct drm_i915_fence_reg
*reg
= &dev_priv
->fence_regs
[i
];
2807 * Commit delayed tiling changes if we have an object still
2808 * attached to the fence, otherwise just clear the fence.
2811 i915_gem_object_update_fence(reg
->obj
, reg
,
2812 reg
->obj
->tiling_mode
);
2814 i915_gem_write_fence(dev
, i
, NULL
);
2819 void i915_gem_reset(struct drm_device
*dev
)
2821 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2822 struct intel_engine_cs
*ring
;
2826 * Before we free the objects from the requests, we need to inspect
2827 * them for finding the guilty party. As the requests only borrow
2828 * their reference to the objects, the inspection must be done first.
2830 for_each_ring(ring
, dev_priv
, i
)
2831 i915_gem_reset_ring_status(dev_priv
, ring
);
2833 for_each_ring(ring
, dev_priv
, i
)
2834 i915_gem_reset_ring_cleanup(dev_priv
, ring
);
2836 i915_gem_context_reset(dev
);
2838 i915_gem_restore_fences(dev
);
2840 WARN_ON(i915_verify_lists(dev
));
2844 * This function clears the request list as sequence numbers are passed.
2847 i915_gem_retire_requests_ring(struct intel_engine_cs
*ring
)
2849 WARN_ON(i915_verify_lists(ring
->dev
));
2851 /* Retire requests first as we use it above for the early return.
2852 * If we retire requests last, we may use a later seqno and so clear
2853 * the requests lists without clearing the active list, leading to
2856 while (!list_empty(&ring
->request_list
)) {
2857 struct drm_i915_gem_request
*request
;
2859 request
= list_first_entry(&ring
->request_list
,
2860 struct drm_i915_gem_request
,
2863 if (!i915_gem_request_completed(request
, true))
2866 i915_gem_request_retire(request
);
2869 /* Move any buffers on the active list that are no longer referenced
2870 * by the ringbuffer to the flushing/inactive lists as appropriate,
2871 * before we free the context associated with the requests.
2873 while (!list_empty(&ring
->active_list
)) {
2874 struct drm_i915_gem_object
*obj
;
2876 obj
= list_first_entry(&ring
->active_list
,
2877 struct drm_i915_gem_object
,
2878 ring_list
[ring
->id
]);
2880 if (!list_empty(&obj
->last_read_req
[ring
->id
]->list
))
2883 i915_gem_object_retire__read(obj
, ring
->id
);
2886 if (unlikely(ring
->trace_irq_req
&&
2887 i915_gem_request_completed(ring
->trace_irq_req
, true))) {
2888 ring
->irq_put(ring
);
2889 i915_gem_request_assign(&ring
->trace_irq_req
, NULL
);
2892 WARN_ON(i915_verify_lists(ring
->dev
));
2896 i915_gem_retire_requests(struct drm_device
*dev
)
2898 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2899 struct intel_engine_cs
*ring
;
2903 for_each_ring(ring
, dev_priv
, i
) {
2904 i915_gem_retire_requests_ring(ring
);
2905 idle
&= list_empty(&ring
->request_list
);
2906 if (i915
.enable_execlists
) {
2907 unsigned long flags
;
2909 spin_lock_irqsave(&ring
->execlist_lock
, flags
);
2910 idle
&= list_empty(&ring
->execlist_queue
);
2911 spin_unlock_irqrestore(&ring
->execlist_lock
, flags
);
2913 intel_execlists_retire_requests(ring
);
2918 mod_delayed_work(dev_priv
->wq
,
2919 &dev_priv
->mm
.idle_work
,
2920 msecs_to_jiffies(100));
2926 i915_gem_retire_work_handler(struct work_struct
*work
)
2928 struct drm_i915_private
*dev_priv
=
2929 container_of(work
, typeof(*dev_priv
), mm
.retire_work
.work
);
2930 struct drm_device
*dev
= dev_priv
->dev
;
2933 /* Come back later if the device is busy... */
2935 if (mutex_trylock(&dev
->struct_mutex
)) {
2936 idle
= i915_gem_retire_requests(dev
);
2937 mutex_unlock(&dev
->struct_mutex
);
2940 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
,
2941 round_jiffies_up_relative(HZ
));
2945 i915_gem_idle_work_handler(struct work_struct
*work
)
2947 struct drm_i915_private
*dev_priv
=
2948 container_of(work
, typeof(*dev_priv
), mm
.idle_work
.work
);
2949 struct drm_device
*dev
= dev_priv
->dev
;
2950 struct intel_engine_cs
*ring
;
2953 for_each_ring(ring
, dev_priv
, i
)
2954 if (!list_empty(&ring
->request_list
))
2957 intel_mark_idle(dev
);
2959 if (mutex_trylock(&dev
->struct_mutex
)) {
2960 struct intel_engine_cs
*ring
;
2963 for_each_ring(ring
, dev_priv
, i
)
2964 i915_gem_batch_pool_fini(&ring
->batch_pool
);
2966 mutex_unlock(&dev
->struct_mutex
);
2971 * Ensures that an object will eventually get non-busy by flushing any required
2972 * write domains, emitting any outstanding lazy request and retiring and
2973 * completed requests.
2976 i915_gem_object_flush_active(struct drm_i915_gem_object
*obj
)
2983 for (i
= 0; i
< I915_NUM_RINGS
; i
++) {
2984 struct drm_i915_gem_request
*req
;
2986 req
= obj
->last_read_req
[i
];
2990 if (list_empty(&req
->list
))
2993 ret
= i915_gem_check_olr(req
);
2997 if (i915_gem_request_completed(req
, true)) {
2998 __i915_gem_request_retire__upto(req
);
3000 i915_gem_object_retire__read(obj
, i
);
3008 * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT
3009 * @DRM_IOCTL_ARGS: standard ioctl arguments
3011 * Returns 0 if successful, else an error is returned with the remaining time in
3012 * the timeout parameter.
3013 * -ETIME: object is still busy after timeout
3014 * -ERESTARTSYS: signal interrupted the wait
3015 * -ENONENT: object doesn't exist
3016 * Also possible, but rare:
3017 * -EAGAIN: GPU wedged
3019 * -ENODEV: Internal IRQ fail
3020 * -E?: The add request failed
3022 * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any
3023 * non-zero timeout parameter the wait ioctl will wait for the given number of
3024 * nanoseconds on an object becoming unbusy. Since the wait itself does so
3025 * without holding struct_mutex the object may become re-busied before this
3026 * function completes. A similar but shorter * race condition exists in the busy
3030 i915_gem_wait_ioctl(struct drm_device
*dev
, void *data
, struct drm_file
*file
)
3032 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3033 struct drm_i915_gem_wait
*args
= data
;
3034 struct drm_i915_gem_object
*obj
;
3035 struct drm_i915_gem_request
*req
[I915_NUM_RINGS
];
3036 unsigned reset_counter
;
3040 if (args
->flags
!= 0)
3043 ret
= i915_mutex_lock_interruptible(dev
);
3047 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->bo_handle
));
3048 if (&obj
->base
== NULL
) {
3049 mutex_unlock(&dev
->struct_mutex
);
3053 /* Need to make sure the object gets inactive eventually. */
3054 ret
= i915_gem_object_flush_active(obj
);
3061 /* Do this after OLR check to make sure we make forward progress polling
3062 * on this IOCTL with a timeout == 0 (like busy ioctl)
3064 if (args
->timeout_ns
== 0) {
3069 drm_gem_object_unreference(&obj
->base
);
3070 reset_counter
= atomic_read(&dev_priv
->gpu_error
.reset_counter
);
3072 for (i
= 0; i
< I915_NUM_RINGS
; i
++) {
3073 if (obj
->last_read_req
[i
] == NULL
)
3076 req
[n
++] = i915_gem_request_reference(obj
->last_read_req
[i
]);
3079 mutex_unlock(&dev
->struct_mutex
);
3081 for (i
= 0; i
< n
; i
++) {
3083 ret
= __i915_wait_request(req
[i
], reset_counter
, true,
3084 args
->timeout_ns
> 0 ? &args
->timeout_ns
: NULL
,
3086 i915_gem_request_unreference__unlocked(req
[i
]);
3091 drm_gem_object_unreference(&obj
->base
);
3092 mutex_unlock(&dev
->struct_mutex
);
3097 __i915_gem_object_sync(struct drm_i915_gem_object
*obj
,
3098 struct intel_engine_cs
*to
,
3099 struct drm_i915_gem_request
*from_req
,
3100 struct drm_i915_gem_request
**to_req
)
3102 struct intel_engine_cs
*from
;
3105 from
= i915_gem_request_get_ring(from_req
);
3109 if (i915_gem_request_completed(from_req
, true))
3112 ret
= i915_gem_check_olr(from_req
);
3116 if (!i915_semaphore_is_enabled(obj
->base
.dev
)) {
3117 struct drm_i915_private
*i915
= to_i915(obj
->base
.dev
);
3118 ret
= __i915_wait_request(from_req
,
3119 atomic_read(&i915
->gpu_error
.reset_counter
),
3120 i915
->mm
.interruptible
,
3122 &i915
->rps
.semaphores
);
3126 i915_gem_object_retire_request(obj
, from_req
);
3128 int idx
= intel_ring_sync_index(from
, to
);
3129 u32 seqno
= i915_gem_request_get_seqno(from_req
);
3133 if (seqno
<= from
->semaphore
.sync_seqno
[idx
])
3136 if (*to_req
== NULL
) {
3137 ret
= i915_gem_request_alloc(to
, to
->default_context
, to_req
);
3142 trace_i915_gem_ring_sync_to(*to_req
, from
, from_req
);
3143 ret
= to
->semaphore
.sync_to(*to_req
, from
, seqno
);
3147 /* We use last_read_req because sync_to()
3148 * might have just caused seqno wrap under
3151 from
->semaphore
.sync_seqno
[idx
] =
3152 i915_gem_request_get_seqno(obj
->last_read_req
[from
->id
]);
3159 * i915_gem_object_sync - sync an object to a ring.
3161 * @obj: object which may be in use on another ring.
3162 * @to: ring we wish to use the object on. May be NULL.
3163 * @to_req: request we wish to use the object for. See below.
3164 * This will be allocated and returned if a request is
3165 * required but not passed in.
3167 * This code is meant to abstract object synchronization with the GPU.
3168 * Calling with NULL implies synchronizing the object with the CPU
3169 * rather than a particular GPU ring. Conceptually we serialise writes
3170 * between engines inside the GPU. We only allow one engine to write
3171 * into a buffer at any time, but multiple readers. To ensure each has
3172 * a coherent view of memory, we must:
3174 * - If there is an outstanding write request to the object, the new
3175 * request must wait for it to complete (either CPU or in hw, requests
3176 * on the same ring will be naturally ordered).
3178 * - If we are a write request (pending_write_domain is set), the new
3179 * request must wait for outstanding read requests to complete.
3181 * For CPU synchronisation (NULL to) no request is required. For syncing with
3182 * rings to_req must be non-NULL. However, a request does not have to be
3183 * pre-allocated. If *to_req is NULL and sync commands will be emitted then a
3184 * request will be allocated automatically and returned through *to_req. Note
3185 * that it is not guaranteed that commands will be emitted (because the system
3186 * might already be idle). Hence there is no need to create a request that
3187 * might never have any work submitted. Note further that if a request is
3188 * returned in *to_req, it is the responsibility of the caller to submit
3189 * that request (after potentially adding more work to it).
3191 * Returns 0 if successful, else propagates up the lower layer error.
3194 i915_gem_object_sync(struct drm_i915_gem_object
*obj
,
3195 struct intel_engine_cs
*to
,
3196 struct drm_i915_gem_request
**to_req
)
3198 const bool readonly
= obj
->base
.pending_write_domain
== 0;
3199 struct drm_i915_gem_request
*req
[I915_NUM_RINGS
];
3206 return i915_gem_object_wait_rendering(obj
, readonly
);
3210 if (obj
->last_write_req
)
3211 req
[n
++] = obj
->last_write_req
;
3213 for (i
= 0; i
< I915_NUM_RINGS
; i
++)
3214 if (obj
->last_read_req
[i
])
3215 req
[n
++] = obj
->last_read_req
[i
];
3217 for (i
= 0; i
< n
; i
++) {
3218 ret
= __i915_gem_object_sync(obj
, to
, req
[i
], to_req
);
3226 static void i915_gem_object_finish_gtt(struct drm_i915_gem_object
*obj
)
3228 u32 old_write_domain
, old_read_domains
;
3230 /* Force a pagefault for domain tracking on next user access */
3231 i915_gem_release_mmap(obj
);
3233 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
) == 0)
3236 /* Wait for any direct GTT access to complete */
3239 old_read_domains
= obj
->base
.read_domains
;
3240 old_write_domain
= obj
->base
.write_domain
;
3242 obj
->base
.read_domains
&= ~I915_GEM_DOMAIN_GTT
;
3243 obj
->base
.write_domain
&= ~I915_GEM_DOMAIN_GTT
;
3245 trace_i915_gem_object_change_domain(obj
,
3250 int i915_vma_unbind(struct i915_vma
*vma
)
3252 struct drm_i915_gem_object
*obj
= vma
->obj
;
3253 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
3256 if (list_empty(&vma
->vma_link
))
3259 if (!drm_mm_node_allocated(&vma
->node
)) {
3260 i915_gem_vma_destroy(vma
);
3267 BUG_ON(obj
->pages
== NULL
);
3269 ret
= i915_gem_object_wait_rendering(obj
, false);
3272 /* Continue on if we fail due to EIO, the GPU is hung so we
3273 * should be safe and we need to cleanup or else we might
3274 * cause memory corruption through use-after-free.
3277 if (i915_is_ggtt(vma
->vm
) &&
3278 vma
->ggtt_view
.type
== I915_GGTT_VIEW_NORMAL
) {
3279 i915_gem_object_finish_gtt(obj
);
3281 /* release the fence reg _after_ flushing */
3282 ret
= i915_gem_object_put_fence(obj
);
3287 trace_i915_vma_unbind(vma
);
3289 vma
->vm
->unbind_vma(vma
);
3292 list_del_init(&vma
->mm_list
);
3293 if (i915_is_ggtt(vma
->vm
)) {
3294 if (vma
->ggtt_view
.type
== I915_GGTT_VIEW_NORMAL
) {
3295 obj
->map_and_fenceable
= false;
3296 } else if (vma
->ggtt_view
.pages
) {
3297 sg_free_table(vma
->ggtt_view
.pages
);
3298 kfree(vma
->ggtt_view
.pages
);
3299 vma
->ggtt_view
.pages
= NULL
;
3303 drm_mm_remove_node(&vma
->node
);
3304 i915_gem_vma_destroy(vma
);
3306 /* Since the unbound list is global, only move to that list if
3307 * no more VMAs exist. */
3308 if (list_empty(&obj
->vma_list
)) {
3309 i915_gem_gtt_finish_object(obj
);
3310 list_move_tail(&obj
->global_list
, &dev_priv
->mm
.unbound_list
);
3313 /* And finally now the object is completely decoupled from this vma,
3314 * we can drop its hold on the backing storage and allow it to be
3315 * reaped by the shrinker.
3317 i915_gem_object_unpin_pages(obj
);
3322 int i915_gpu_idle(struct drm_device
*dev
)
3324 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3325 struct intel_engine_cs
*ring
;
3328 /* Flush everything onto the inactive list. */
3329 for_each_ring(ring
, dev_priv
, i
) {
3330 if (!i915
.enable_execlists
) {
3331 struct drm_i915_gem_request
*req
;
3333 ret
= i915_gem_request_alloc(ring
, ring
->default_context
, &req
);
3337 ret
= i915_switch_context(req
);
3339 i915_gem_request_cancel(req
);
3343 i915_add_request_no_flush(req
);
3346 WARN_ON(ring
->outstanding_lazy_request
);
3348 ret
= intel_ring_idle(ring
);
3353 WARN_ON(i915_verify_lists(dev
));
3357 static void i965_write_fence_reg(struct drm_device
*dev
, int reg
,
3358 struct drm_i915_gem_object
*obj
)
3360 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3362 int fence_pitch_shift
;
3364 if (INTEL_INFO(dev
)->gen
>= 6) {
3365 fence_reg
= FENCE_REG_SANDYBRIDGE_0
;
3366 fence_pitch_shift
= SANDYBRIDGE_FENCE_PITCH_SHIFT
;
3368 fence_reg
= FENCE_REG_965_0
;
3369 fence_pitch_shift
= I965_FENCE_PITCH_SHIFT
;
3372 fence_reg
+= reg
* 8;
3374 /* To w/a incoherency with non-atomic 64-bit register updates,
3375 * we split the 64-bit update into two 32-bit writes. In order
3376 * for a partial fence not to be evaluated between writes, we
3377 * precede the update with write to turn off the fence register,
3378 * and only enable the fence as the last step.
3380 * For extra levels of paranoia, we make sure each step lands
3381 * before applying the next step.
3383 I915_WRITE(fence_reg
, 0);
3384 POSTING_READ(fence_reg
);
3387 u32 size
= i915_gem_obj_ggtt_size(obj
);
3390 /* Adjust fence size to match tiled area */
3391 if (obj
->tiling_mode
!= I915_TILING_NONE
) {
3392 uint32_t row_size
= obj
->stride
*
3393 (obj
->tiling_mode
== I915_TILING_Y
? 32 : 8);
3394 size
= (size
/ row_size
) * row_size
;
3397 val
= (uint64_t)((i915_gem_obj_ggtt_offset(obj
) + size
- 4096) &
3399 val
|= i915_gem_obj_ggtt_offset(obj
) & 0xfffff000;
3400 val
|= (uint64_t)((obj
->stride
/ 128) - 1) << fence_pitch_shift
;
3401 if (obj
->tiling_mode
== I915_TILING_Y
)
3402 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
3403 val
|= I965_FENCE_REG_VALID
;
3405 I915_WRITE(fence_reg
+ 4, val
>> 32);
3406 POSTING_READ(fence_reg
+ 4);
3408 I915_WRITE(fence_reg
+ 0, val
);
3409 POSTING_READ(fence_reg
);
3411 I915_WRITE(fence_reg
+ 4, 0);
3412 POSTING_READ(fence_reg
+ 4);
3416 static void i915_write_fence_reg(struct drm_device
*dev
, int reg
,
3417 struct drm_i915_gem_object
*obj
)
3419 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3423 u32 size
= i915_gem_obj_ggtt_size(obj
);
3427 WARN((i915_gem_obj_ggtt_offset(obj
) & ~I915_FENCE_START_MASK
) ||
3428 (size
& -size
) != size
||
3429 (i915_gem_obj_ggtt_offset(obj
) & (size
- 1)),
3430 "object 0x%08lx [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
3431 i915_gem_obj_ggtt_offset(obj
), obj
->map_and_fenceable
, size
);
3433 if (obj
->tiling_mode
== I915_TILING_Y
&& HAS_128_BYTE_Y_TILING(dev
))
3438 /* Note: pitch better be a power of two tile widths */
3439 pitch_val
= obj
->stride
/ tile_width
;
3440 pitch_val
= ffs(pitch_val
) - 1;
3442 val
= i915_gem_obj_ggtt_offset(obj
);
3443 if (obj
->tiling_mode
== I915_TILING_Y
)
3444 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
3445 val
|= I915_FENCE_SIZE_BITS(size
);
3446 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
3447 val
|= I830_FENCE_REG_VALID
;
3452 reg
= FENCE_REG_830_0
+ reg
* 4;
3454 reg
= FENCE_REG_945_8
+ (reg
- 8) * 4;
3456 I915_WRITE(reg
, val
);
3460 static void i830_write_fence_reg(struct drm_device
*dev
, int reg
,
3461 struct drm_i915_gem_object
*obj
)
3463 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3467 u32 size
= i915_gem_obj_ggtt_size(obj
);
3470 WARN((i915_gem_obj_ggtt_offset(obj
) & ~I830_FENCE_START_MASK
) ||
3471 (size
& -size
) != size
||
3472 (i915_gem_obj_ggtt_offset(obj
) & (size
- 1)),
3473 "object 0x%08lx not 512K or pot-size 0x%08x aligned\n",
3474 i915_gem_obj_ggtt_offset(obj
), size
);
3476 pitch_val
= obj
->stride
/ 128;
3477 pitch_val
= ffs(pitch_val
) - 1;
3479 val
= i915_gem_obj_ggtt_offset(obj
);
3480 if (obj
->tiling_mode
== I915_TILING_Y
)
3481 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
3482 val
|= I830_FENCE_SIZE_BITS(size
);
3483 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
3484 val
|= I830_FENCE_REG_VALID
;
3488 I915_WRITE(FENCE_REG_830_0
+ reg
* 4, val
);
3489 POSTING_READ(FENCE_REG_830_0
+ reg
* 4);
3492 inline static bool i915_gem_object_needs_mb(struct drm_i915_gem_object
*obj
)
3494 return obj
&& obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
;
3497 static void i915_gem_write_fence(struct drm_device
*dev
, int reg
,
3498 struct drm_i915_gem_object
*obj
)
3500 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3502 /* Ensure that all CPU reads are completed before installing a fence
3503 * and all writes before removing the fence.
3505 if (i915_gem_object_needs_mb(dev_priv
->fence_regs
[reg
].obj
))
3508 WARN(obj
&& (!obj
->stride
|| !obj
->tiling_mode
),
3509 "bogus fence setup with stride: 0x%x, tiling mode: %i\n",
3510 obj
->stride
, obj
->tiling_mode
);
3513 i830_write_fence_reg(dev
, reg
, obj
);
3514 else if (IS_GEN3(dev
))
3515 i915_write_fence_reg(dev
, reg
, obj
);
3516 else if (INTEL_INFO(dev
)->gen
>= 4)
3517 i965_write_fence_reg(dev
, reg
, obj
);
3519 /* And similarly be paranoid that no direct access to this region
3520 * is reordered to before the fence is installed.
3522 if (i915_gem_object_needs_mb(obj
))
3526 static inline int fence_number(struct drm_i915_private
*dev_priv
,
3527 struct drm_i915_fence_reg
*fence
)
3529 return fence
- dev_priv
->fence_regs
;
3532 static void i915_gem_object_update_fence(struct drm_i915_gem_object
*obj
,
3533 struct drm_i915_fence_reg
*fence
,
3536 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
3537 int reg
= fence_number(dev_priv
, fence
);
3539 i915_gem_write_fence(obj
->base
.dev
, reg
, enable
? obj
: NULL
);
3542 obj
->fence_reg
= reg
;
3544 list_move_tail(&fence
->lru_list
, &dev_priv
->mm
.fence_list
);
3546 obj
->fence_reg
= I915_FENCE_REG_NONE
;
3548 list_del_init(&fence
->lru_list
);
3550 obj
->fence_dirty
= false;
3554 i915_gem_object_wait_fence(struct drm_i915_gem_object
*obj
)
3556 if (obj
->last_fenced_req
) {
3557 int ret
= i915_wait_request(obj
->last_fenced_req
);
3561 i915_gem_request_assign(&obj
->last_fenced_req
, NULL
);
3568 i915_gem_object_put_fence(struct drm_i915_gem_object
*obj
)
3570 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
3571 struct drm_i915_fence_reg
*fence
;
3574 ret
= i915_gem_object_wait_fence(obj
);
3578 if (obj
->fence_reg
== I915_FENCE_REG_NONE
)
3581 fence
= &dev_priv
->fence_regs
[obj
->fence_reg
];
3583 if (WARN_ON(fence
->pin_count
))
3586 i915_gem_object_fence_lost(obj
);
3587 i915_gem_object_update_fence(obj
, fence
, false);
3592 static struct drm_i915_fence_reg
*
3593 i915_find_fence_reg(struct drm_device
*dev
)
3595 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3596 struct drm_i915_fence_reg
*reg
, *avail
;
3599 /* First try to find a free reg */
3601 for (i
= dev_priv
->fence_reg_start
; i
< dev_priv
->num_fence_regs
; i
++) {
3602 reg
= &dev_priv
->fence_regs
[i
];
3606 if (!reg
->pin_count
)
3613 /* None available, try to steal one or wait for a user to finish */
3614 list_for_each_entry(reg
, &dev_priv
->mm
.fence_list
, lru_list
) {
3622 /* Wait for completion of pending flips which consume fences */
3623 if (intel_has_pending_fb_unpin(dev
))
3624 return ERR_PTR(-EAGAIN
);
3626 return ERR_PTR(-EDEADLK
);
3630 * i915_gem_object_get_fence - set up fencing for an object
3631 * @obj: object to map through a fence reg
3633 * When mapping objects through the GTT, userspace wants to be able to write
3634 * to them without having to worry about swizzling if the object is tiled.
3635 * This function walks the fence regs looking for a free one for @obj,
3636 * stealing one if it can't find any.
3638 * It then sets up the reg based on the object's properties: address, pitch
3639 * and tiling format.
3641 * For an untiled surface, this removes any existing fence.
3644 i915_gem_object_get_fence(struct drm_i915_gem_object
*obj
)
3646 struct drm_device
*dev
= obj
->base
.dev
;
3647 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3648 bool enable
= obj
->tiling_mode
!= I915_TILING_NONE
;
3649 struct drm_i915_fence_reg
*reg
;
3652 /* Have we updated the tiling parameters upon the object and so
3653 * will need to serialise the write to the associated fence register?
3655 if (obj
->fence_dirty
) {
3656 ret
= i915_gem_object_wait_fence(obj
);
3661 /* Just update our place in the LRU if our fence is getting reused. */
3662 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
3663 reg
= &dev_priv
->fence_regs
[obj
->fence_reg
];
3664 if (!obj
->fence_dirty
) {
3665 list_move_tail(®
->lru_list
,
3666 &dev_priv
->mm
.fence_list
);
3669 } else if (enable
) {
3670 if (WARN_ON(!obj
->map_and_fenceable
))
3673 reg
= i915_find_fence_reg(dev
);
3675 return PTR_ERR(reg
);
3678 struct drm_i915_gem_object
*old
= reg
->obj
;
3680 ret
= i915_gem_object_wait_fence(old
);
3684 i915_gem_object_fence_lost(old
);
3689 i915_gem_object_update_fence(obj
, reg
, enable
);
3694 static bool i915_gem_valid_gtt_space(struct i915_vma
*vma
,
3695 unsigned long cache_level
)
3697 struct drm_mm_node
*gtt_space
= &vma
->node
;
3698 struct drm_mm_node
*other
;
3701 * On some machines we have to be careful when putting differing types
3702 * of snoopable memory together to avoid the prefetcher crossing memory
3703 * domains and dying. During vm initialisation, we decide whether or not
3704 * these constraints apply and set the drm_mm.color_adjust
3707 if (vma
->vm
->mm
.color_adjust
== NULL
)
3710 if (!drm_mm_node_allocated(gtt_space
))
3713 if (list_empty(>t_space
->node_list
))
3716 other
= list_entry(gtt_space
->node_list
.prev
, struct drm_mm_node
, node_list
);
3717 if (other
->allocated
&& !other
->hole_follows
&& other
->color
!= cache_level
)
3720 other
= list_entry(gtt_space
->node_list
.next
, struct drm_mm_node
, node_list
);
3721 if (other
->allocated
&& !gtt_space
->hole_follows
&& other
->color
!= cache_level
)
3728 * Finds free space in the GTT aperture and binds the object or a view of it
3731 static struct i915_vma
*
3732 i915_gem_object_bind_to_vm(struct drm_i915_gem_object
*obj
,
3733 struct i915_address_space
*vm
,
3734 const struct i915_ggtt_view
*ggtt_view
,
3738 struct drm_device
*dev
= obj
->base
.dev
;
3739 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3740 u32 size
, fence_size
, fence_alignment
, unfenced_alignment
;
3741 unsigned long start
=
3742 flags
& PIN_OFFSET_BIAS
? flags
& PIN_OFFSET_MASK
: 0;
3744 flags
& PIN_MAPPABLE
? dev_priv
->gtt
.mappable_end
: vm
->total
;
3745 struct i915_vma
*vma
;
3748 if (i915_is_ggtt(vm
)) {
3751 if (WARN_ON(!ggtt_view
))
3752 return ERR_PTR(-EINVAL
);
3754 view_size
= i915_ggtt_view_size(obj
, ggtt_view
);
3756 fence_size
= i915_gem_get_gtt_size(dev
,
3759 fence_alignment
= i915_gem_get_gtt_alignment(dev
,
3763 unfenced_alignment
= i915_gem_get_gtt_alignment(dev
,
3767 size
= flags
& PIN_MAPPABLE
? fence_size
: view_size
;
3769 fence_size
= i915_gem_get_gtt_size(dev
,
3772 fence_alignment
= i915_gem_get_gtt_alignment(dev
,
3776 unfenced_alignment
=
3777 i915_gem_get_gtt_alignment(dev
,
3781 size
= flags
& PIN_MAPPABLE
? fence_size
: obj
->base
.size
;
3785 alignment
= flags
& PIN_MAPPABLE
? fence_alignment
:
3787 if (flags
& PIN_MAPPABLE
&& alignment
& (fence_alignment
- 1)) {
3788 DRM_DEBUG("Invalid object (view type=%u) alignment requested %u\n",
3789 ggtt_view
? ggtt_view
->type
: 0,
3791 return ERR_PTR(-EINVAL
);
3794 /* If binding the object/GGTT view requires more space than the entire
3795 * aperture has, reject it early before evicting everything in a vain
3796 * attempt to find space.
3799 DRM_DEBUG("Attempting to bind an object (view type=%u) larger than the aperture: size=%u > %s aperture=%lu\n",
3800 ggtt_view
? ggtt_view
->type
: 0,
3802 flags
& PIN_MAPPABLE
? "mappable" : "total",
3804 return ERR_PTR(-E2BIG
);
3807 ret
= i915_gem_object_get_pages(obj
);
3809 return ERR_PTR(ret
);
3811 i915_gem_object_pin_pages(obj
);
3813 vma
= ggtt_view
? i915_gem_obj_lookup_or_create_ggtt_vma(obj
, ggtt_view
) :
3814 i915_gem_obj_lookup_or_create_vma(obj
, vm
);
3820 ret
= drm_mm_insert_node_in_range_generic(&vm
->mm
, &vma
->node
,
3824 DRM_MM_SEARCH_DEFAULT
,
3825 DRM_MM_CREATE_DEFAULT
);
3827 ret
= i915_gem_evict_something(dev
, vm
, size
, alignment
,
3836 if (WARN_ON(!i915_gem_valid_gtt_space(vma
, obj
->cache_level
))) {
3838 goto err_remove_node
;
3841 ret
= i915_gem_gtt_prepare_object(obj
);
3843 goto err_remove_node
;
3845 trace_i915_vma_bind(vma
, flags
);
3846 ret
= i915_vma_bind(vma
, obj
->cache_level
, flags
);
3848 goto err_finish_gtt
;
3850 list_move_tail(&obj
->global_list
, &dev_priv
->mm
.bound_list
);
3851 list_add_tail(&vma
->mm_list
, &vm
->inactive_list
);
3856 i915_gem_gtt_finish_object(obj
);
3858 drm_mm_remove_node(&vma
->node
);
3860 i915_gem_vma_destroy(vma
);
3863 i915_gem_object_unpin_pages(obj
);
3868 i915_gem_clflush_object(struct drm_i915_gem_object
*obj
,
3871 /* If we don't have a page list set up, then we're not pinned
3872 * to GPU, and we can ignore the cache flush because it'll happen
3873 * again at bind time.
3875 if (obj
->pages
== NULL
)
3879 * Stolen memory is always coherent with the GPU as it is explicitly
3880 * marked as wc by the system, or the system is cache-coherent.
3882 if (obj
->stolen
|| obj
->phys_handle
)
3885 /* If the GPU is snooping the contents of the CPU cache,
3886 * we do not need to manually clear the CPU cache lines. However,
3887 * the caches are only snooped when the render cache is
3888 * flushed/invalidated. As we always have to emit invalidations
3889 * and flushes when moving into and out of the RENDER domain, correct
3890 * snooping behaviour occurs naturally as the result of our domain
3893 if (!force
&& cpu_cache_is_coherent(obj
->base
.dev
, obj
->cache_level
)) {
3894 obj
->cache_dirty
= true;
3898 trace_i915_gem_object_clflush(obj
);
3899 drm_clflush_sg(obj
->pages
);
3900 obj
->cache_dirty
= false;
3905 /** Flushes the GTT write domain for the object if it's dirty. */
3907 i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
)
3909 uint32_t old_write_domain
;
3911 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_GTT
)
3914 /* No actual flushing is required for the GTT write domain. Writes
3915 * to it immediately go to main memory as far as we know, so there's
3916 * no chipset flush. It also doesn't land in render cache.
3918 * However, we do have to enforce the order so that all writes through
3919 * the GTT land before any writes to the device, such as updates to
3924 old_write_domain
= obj
->base
.write_domain
;
3925 obj
->base
.write_domain
= 0;
3927 intel_fb_obj_flush(obj
, false);
3929 trace_i915_gem_object_change_domain(obj
,
3930 obj
->base
.read_domains
,
3934 /** Flushes the CPU write domain for the object if it's dirty. */
3936 i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
)
3938 uint32_t old_write_domain
;
3940 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
)
3943 if (i915_gem_clflush_object(obj
, obj
->pin_display
))
3944 i915_gem_chipset_flush(obj
->base
.dev
);
3946 old_write_domain
= obj
->base
.write_domain
;
3947 obj
->base
.write_domain
= 0;
3949 intel_fb_obj_flush(obj
, false);
3951 trace_i915_gem_object_change_domain(obj
,
3952 obj
->base
.read_domains
,
3957 * Moves a single object to the GTT read, and possibly write domain.
3959 * This function returns when the move is complete, including waiting on
3963 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object
*obj
, bool write
)
3965 uint32_t old_write_domain
, old_read_domains
;
3966 struct i915_vma
*vma
;
3969 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_GTT
)
3972 ret
= i915_gem_object_wait_rendering(obj
, !write
);
3976 /* Flush and acquire obj->pages so that we are coherent through
3977 * direct access in memory with previous cached writes through
3978 * shmemfs and that our cache domain tracking remains valid.
3979 * For example, if the obj->filp was moved to swap without us
3980 * being notified and releasing the pages, we would mistakenly
3981 * continue to assume that the obj remained out of the CPU cached
3984 ret
= i915_gem_object_get_pages(obj
);
3988 i915_gem_object_flush_cpu_write_domain(obj
);
3990 /* Serialise direct access to this object with the barriers for
3991 * coherent writes from the GPU, by effectively invalidating the
3992 * GTT domain upon first access.
3994 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
) == 0)
3997 old_write_domain
= obj
->base
.write_domain
;
3998 old_read_domains
= obj
->base
.read_domains
;
4000 /* It should now be out of any other write domains, and we can update
4001 * the domain values for our changes.
4003 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_GTT
) != 0);
4004 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
4006 obj
->base
.read_domains
= I915_GEM_DOMAIN_GTT
;
4007 obj
->base
.write_domain
= I915_GEM_DOMAIN_GTT
;
4012 intel_fb_obj_invalidate(obj
, ORIGIN_GTT
);
4014 trace_i915_gem_object_change_domain(obj
,
4018 /* And bump the LRU for this access */
4019 vma
= i915_gem_obj_to_ggtt(obj
);
4020 if (vma
&& drm_mm_node_allocated(&vma
->node
) && !obj
->active
)
4021 list_move_tail(&vma
->mm_list
,
4022 &to_i915(obj
->base
.dev
)->gtt
.base
.inactive_list
);
4027 int i915_gem_object_set_cache_level(struct drm_i915_gem_object
*obj
,
4028 enum i915_cache_level cache_level
)
4030 struct drm_device
*dev
= obj
->base
.dev
;
4031 struct i915_vma
*vma
, *next
;
4034 if (obj
->cache_level
== cache_level
)
4037 if (i915_gem_obj_is_pinned(obj
)) {
4038 DRM_DEBUG("can not change the cache level of pinned objects\n");
4042 list_for_each_entry_safe(vma
, next
, &obj
->vma_list
, vma_link
) {
4043 if (!i915_gem_valid_gtt_space(vma
, cache_level
)) {
4044 ret
= i915_vma_unbind(vma
);
4050 if (i915_gem_obj_bound_any(obj
)) {
4051 ret
= i915_gem_object_wait_rendering(obj
, false);
4055 i915_gem_object_finish_gtt(obj
);
4057 /* Before SandyBridge, you could not use tiling or fence
4058 * registers with snooped memory, so relinquish any fences
4059 * currently pointing to our region in the aperture.
4061 if (INTEL_INFO(dev
)->gen
< 6) {
4062 ret
= i915_gem_object_put_fence(obj
);
4067 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
)
4068 if (drm_mm_node_allocated(&vma
->node
)) {
4069 ret
= i915_vma_bind(vma
, cache_level
,
4076 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
)
4077 vma
->node
.color
= cache_level
;
4078 obj
->cache_level
= cache_level
;
4080 if (obj
->cache_dirty
&&
4081 obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
&&
4082 cpu_write_needs_clflush(obj
)) {
4083 if (i915_gem_clflush_object(obj
, true))
4084 i915_gem_chipset_flush(obj
->base
.dev
);
4090 int i915_gem_get_caching_ioctl(struct drm_device
*dev
, void *data
,
4091 struct drm_file
*file
)
4093 struct drm_i915_gem_caching
*args
= data
;
4094 struct drm_i915_gem_object
*obj
;
4096 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
4097 if (&obj
->base
== NULL
)
4100 switch (obj
->cache_level
) {
4101 case I915_CACHE_LLC
:
4102 case I915_CACHE_L3_LLC
:
4103 args
->caching
= I915_CACHING_CACHED
;
4107 args
->caching
= I915_CACHING_DISPLAY
;
4111 args
->caching
= I915_CACHING_NONE
;
4115 drm_gem_object_unreference_unlocked(&obj
->base
);
4119 int i915_gem_set_caching_ioctl(struct drm_device
*dev
, void *data
,
4120 struct drm_file
*file
)
4122 struct drm_i915_gem_caching
*args
= data
;
4123 struct drm_i915_gem_object
*obj
;
4124 enum i915_cache_level level
;
4127 switch (args
->caching
) {
4128 case I915_CACHING_NONE
:
4129 level
= I915_CACHE_NONE
;
4131 case I915_CACHING_CACHED
:
4132 level
= I915_CACHE_LLC
;
4134 case I915_CACHING_DISPLAY
:
4135 level
= HAS_WT(dev
) ? I915_CACHE_WT
: I915_CACHE_NONE
;
4141 ret
= i915_mutex_lock_interruptible(dev
);
4145 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
4146 if (&obj
->base
== NULL
) {
4151 ret
= i915_gem_object_set_cache_level(obj
, level
);
4153 drm_gem_object_unreference(&obj
->base
);
4155 mutex_unlock(&dev
->struct_mutex
);
4160 * Prepare buffer for display plane (scanout, cursors, etc).
4161 * Can be called from an uninterruptible phase (modesetting) and allows
4162 * any flushes to be pipelined (for pageflips).
4165 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object
*obj
,
4167 struct intel_engine_cs
*pipelined
,
4168 struct drm_i915_gem_request
**pipelined_request
,
4169 const struct i915_ggtt_view
*view
)
4171 u32 old_read_domains
, old_write_domain
;
4174 ret
= i915_gem_object_sync(obj
, pipelined
, pipelined_request
);
4178 /* Mark the pin_display early so that we account for the
4179 * display coherency whilst setting up the cache domains.
4183 /* The display engine is not coherent with the LLC cache on gen6. As
4184 * a result, we make sure that the pinning that is about to occur is
4185 * done with uncached PTEs. This is lowest common denominator for all
4188 * However for gen6+, we could do better by using the GFDT bit instead
4189 * of uncaching, which would allow us to flush all the LLC-cached data
4190 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
4192 ret
= i915_gem_object_set_cache_level(obj
,
4193 HAS_WT(obj
->base
.dev
) ? I915_CACHE_WT
: I915_CACHE_NONE
);
4195 goto err_unpin_display
;
4197 /* As the user may map the buffer once pinned in the display plane
4198 * (e.g. libkms for the bootup splash), we have to ensure that we
4199 * always use map_and_fenceable for all scanout buffers.
4201 ret
= i915_gem_object_ggtt_pin(obj
, view
, alignment
,
4202 view
->type
== I915_GGTT_VIEW_NORMAL
?
4205 goto err_unpin_display
;
4207 i915_gem_object_flush_cpu_write_domain(obj
);
4209 old_write_domain
= obj
->base
.write_domain
;
4210 old_read_domains
= obj
->base
.read_domains
;
4212 /* It should now be out of any other write domains, and we can update
4213 * the domain values for our changes.
4215 obj
->base
.write_domain
= 0;
4216 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
4218 trace_i915_gem_object_change_domain(obj
,
4230 i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object
*obj
,
4231 const struct i915_ggtt_view
*view
)
4233 if (WARN_ON(obj
->pin_display
== 0))
4236 i915_gem_object_ggtt_unpin_view(obj
, view
);
4242 * Moves a single object to the CPU read, and possibly write domain.
4244 * This function returns when the move is complete, including waiting on
4248 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object
*obj
, bool write
)
4250 uint32_t old_write_domain
, old_read_domains
;
4253 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_CPU
)
4256 ret
= i915_gem_object_wait_rendering(obj
, !write
);
4260 i915_gem_object_flush_gtt_write_domain(obj
);
4262 old_write_domain
= obj
->base
.write_domain
;
4263 old_read_domains
= obj
->base
.read_domains
;
4265 /* Flush the CPU cache if it's still invalid. */
4266 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
) == 0) {
4267 i915_gem_clflush_object(obj
, false);
4269 obj
->base
.read_domains
|= I915_GEM_DOMAIN_CPU
;
4272 /* It should now be out of any other write domains, and we can update
4273 * the domain values for our changes.
4275 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_CPU
) != 0);
4277 /* If we're writing through the CPU, then the GPU read domains will
4278 * need to be invalidated at next use.
4281 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
4282 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
4286 intel_fb_obj_invalidate(obj
, ORIGIN_CPU
);
4288 trace_i915_gem_object_change_domain(obj
,
4295 /* Throttle our rendering by waiting until the ring has completed our requests
4296 * emitted over 20 msec ago.
4298 * Note that if we were to use the current jiffies each time around the loop,
4299 * we wouldn't escape the function with any frames outstanding if the time to
4300 * render a frame was over 20ms.
4302 * This should get us reasonable parallelism between CPU and GPU but also
4303 * relatively low latency when blocking on a particular request to finish.
4306 i915_gem_ring_throttle(struct drm_device
*dev
, struct drm_file
*file
)
4308 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4309 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
4310 unsigned long recent_enough
= jiffies
- DRM_I915_THROTTLE_JIFFIES
;
4311 struct drm_i915_gem_request
*request
, *target
= NULL
;
4312 unsigned reset_counter
;
4315 ret
= i915_gem_wait_for_error(&dev_priv
->gpu_error
);
4319 ret
= i915_gem_check_wedge(&dev_priv
->gpu_error
, false);
4323 spin_lock(&file_priv
->mm
.lock
);
4324 list_for_each_entry(request
, &file_priv
->mm
.request_list
, client_list
) {
4325 if (time_after_eq(request
->emitted_jiffies
, recent_enough
))
4330 reset_counter
= atomic_read(&dev_priv
->gpu_error
.reset_counter
);
4332 i915_gem_request_reference(target
);
4333 spin_unlock(&file_priv
->mm
.lock
);
4338 ret
= __i915_wait_request(target
, reset_counter
, true, NULL
, NULL
);
4340 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, 0);
4342 i915_gem_request_unreference__unlocked(target
);
4348 i915_vma_misplaced(struct i915_vma
*vma
, uint32_t alignment
, uint64_t flags
)
4350 struct drm_i915_gem_object
*obj
= vma
->obj
;
4353 vma
->node
.start
& (alignment
- 1))
4356 if (flags
& PIN_MAPPABLE
&& !obj
->map_and_fenceable
)
4359 if (flags
& PIN_OFFSET_BIAS
&&
4360 vma
->node
.start
< (flags
& PIN_OFFSET_MASK
))
4367 i915_gem_object_do_pin(struct drm_i915_gem_object
*obj
,
4368 struct i915_address_space
*vm
,
4369 const struct i915_ggtt_view
*ggtt_view
,
4373 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
4374 struct i915_vma
*vma
;
4378 if (WARN_ON(vm
== &dev_priv
->mm
.aliasing_ppgtt
->base
))
4381 if (WARN_ON(flags
& (PIN_GLOBAL
| PIN_MAPPABLE
) && !i915_is_ggtt(vm
)))
4384 if (WARN_ON((flags
& (PIN_MAPPABLE
| PIN_GLOBAL
)) == PIN_MAPPABLE
))
4387 if (WARN_ON(i915_is_ggtt(vm
) != !!ggtt_view
))
4390 vma
= ggtt_view
? i915_gem_obj_to_ggtt_view(obj
, ggtt_view
) :
4391 i915_gem_obj_to_vma(obj
, vm
);
4394 return PTR_ERR(vma
);
4397 if (WARN_ON(vma
->pin_count
== DRM_I915_GEM_OBJECT_MAX_PIN_COUNT
))
4400 if (i915_vma_misplaced(vma
, alignment
, flags
)) {
4401 unsigned long offset
;
4402 offset
= ggtt_view
? i915_gem_obj_ggtt_offset_view(obj
, ggtt_view
) :
4403 i915_gem_obj_offset(obj
, vm
);
4404 WARN(vma
->pin_count
,
4405 "bo is already pinned in %s with incorrect alignment:"
4406 " offset=%lx, req.alignment=%x, req.map_and_fenceable=%d,"
4407 " obj->map_and_fenceable=%d\n",
4408 ggtt_view
? "ggtt" : "ppgtt",
4411 !!(flags
& PIN_MAPPABLE
),
4412 obj
->map_and_fenceable
);
4413 ret
= i915_vma_unbind(vma
);
4421 bound
= vma
? vma
->bound
: 0;
4422 if (vma
== NULL
|| !drm_mm_node_allocated(&vma
->node
)) {
4423 vma
= i915_gem_object_bind_to_vm(obj
, vm
, ggtt_view
, alignment
,
4426 return PTR_ERR(vma
);
4428 ret
= i915_vma_bind(vma
, obj
->cache_level
, flags
);
4433 if (ggtt_view
&& ggtt_view
->type
== I915_GGTT_VIEW_NORMAL
&&
4434 (bound
^ vma
->bound
) & GLOBAL_BIND
) {
4435 bool mappable
, fenceable
;
4436 u32 fence_size
, fence_alignment
;
4438 fence_size
= i915_gem_get_gtt_size(obj
->base
.dev
,
4441 fence_alignment
= i915_gem_get_gtt_alignment(obj
->base
.dev
,
4446 fenceable
= (vma
->node
.size
== fence_size
&&
4447 (vma
->node
.start
& (fence_alignment
- 1)) == 0);
4449 mappable
= (vma
->node
.start
+ fence_size
<=
4450 dev_priv
->gtt
.mappable_end
);
4452 obj
->map_and_fenceable
= mappable
&& fenceable
;
4454 WARN_ON(flags
& PIN_MAPPABLE
&& !obj
->map_and_fenceable
);
4462 i915_gem_object_pin(struct drm_i915_gem_object
*obj
,
4463 struct i915_address_space
*vm
,
4467 return i915_gem_object_do_pin(obj
, vm
,
4468 i915_is_ggtt(vm
) ? &i915_ggtt_view_normal
: NULL
,
4473 i915_gem_object_ggtt_pin(struct drm_i915_gem_object
*obj
,
4474 const struct i915_ggtt_view
*view
,
4478 if (WARN_ONCE(!view
, "no view specified"))
4481 return i915_gem_object_do_pin(obj
, i915_obj_to_ggtt(obj
), view
,
4482 alignment
, flags
| PIN_GLOBAL
);
4486 i915_gem_object_ggtt_unpin_view(struct drm_i915_gem_object
*obj
,
4487 const struct i915_ggtt_view
*view
)
4489 struct i915_vma
*vma
= i915_gem_obj_to_ggtt_view(obj
, view
);
4492 WARN_ON(vma
->pin_count
== 0);
4493 WARN_ON(!i915_gem_obj_ggtt_bound_view(obj
, view
));
4499 i915_gem_object_pin_fence(struct drm_i915_gem_object
*obj
)
4501 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
4502 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
4503 struct i915_vma
*ggtt_vma
= i915_gem_obj_to_ggtt(obj
);
4505 WARN_ON(!ggtt_vma
||
4506 dev_priv
->fence_regs
[obj
->fence_reg
].pin_count
>
4507 ggtt_vma
->pin_count
);
4508 dev_priv
->fence_regs
[obj
->fence_reg
].pin_count
++;
4515 i915_gem_object_unpin_fence(struct drm_i915_gem_object
*obj
)
4517 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
4518 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
4519 WARN_ON(dev_priv
->fence_regs
[obj
->fence_reg
].pin_count
<= 0);
4520 dev_priv
->fence_regs
[obj
->fence_reg
].pin_count
--;
4525 i915_gem_busy_ioctl(struct drm_device
*dev
, void *data
,
4526 struct drm_file
*file
)
4528 struct drm_i915_gem_busy
*args
= data
;
4529 struct drm_i915_gem_object
*obj
;
4532 ret
= i915_mutex_lock_interruptible(dev
);
4536 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
4537 if (&obj
->base
== NULL
) {
4542 /* Count all active objects as busy, even if they are currently not used
4543 * by the gpu. Users of this interface expect objects to eventually
4544 * become non-busy without any further actions, therefore emit any
4545 * necessary flushes here.
4547 ret
= i915_gem_object_flush_active(obj
);
4551 BUILD_BUG_ON(I915_NUM_RINGS
> 16);
4552 args
->busy
= obj
->active
<< 16;
4553 if (obj
->last_write_req
)
4554 args
->busy
|= obj
->last_write_req
->ring
->id
;
4557 drm_gem_object_unreference(&obj
->base
);
4559 mutex_unlock(&dev
->struct_mutex
);
4564 i915_gem_throttle_ioctl(struct drm_device
*dev
, void *data
,
4565 struct drm_file
*file_priv
)
4567 return i915_gem_ring_throttle(dev
, file_priv
);
4571 i915_gem_madvise_ioctl(struct drm_device
*dev
, void *data
,
4572 struct drm_file
*file_priv
)
4574 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4575 struct drm_i915_gem_madvise
*args
= data
;
4576 struct drm_i915_gem_object
*obj
;
4579 switch (args
->madv
) {
4580 case I915_MADV_DONTNEED
:
4581 case I915_MADV_WILLNEED
:
4587 ret
= i915_mutex_lock_interruptible(dev
);
4591 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file_priv
, args
->handle
));
4592 if (&obj
->base
== NULL
) {
4597 if (i915_gem_obj_is_pinned(obj
)) {
4603 obj
->tiling_mode
!= I915_TILING_NONE
&&
4604 dev_priv
->quirks
& QUIRK_PIN_SWIZZLED_PAGES
) {
4605 if (obj
->madv
== I915_MADV_WILLNEED
)
4606 i915_gem_object_unpin_pages(obj
);
4607 if (args
->madv
== I915_MADV_WILLNEED
)
4608 i915_gem_object_pin_pages(obj
);
4611 if (obj
->madv
!= __I915_MADV_PURGED
)
4612 obj
->madv
= args
->madv
;
4614 /* if the object is no longer attached, discard its backing storage */
4615 if (obj
->madv
== I915_MADV_DONTNEED
&& obj
->pages
== NULL
)
4616 i915_gem_object_truncate(obj
);
4618 args
->retained
= obj
->madv
!= __I915_MADV_PURGED
;
4621 drm_gem_object_unreference(&obj
->base
);
4623 mutex_unlock(&dev
->struct_mutex
);
4627 void i915_gem_object_init(struct drm_i915_gem_object
*obj
,
4628 const struct drm_i915_gem_object_ops
*ops
)
4632 INIT_LIST_HEAD(&obj
->global_list
);
4633 for (i
= 0; i
< I915_NUM_RINGS
; i
++)
4634 INIT_LIST_HEAD(&obj
->ring_list
[i
]);
4635 INIT_LIST_HEAD(&obj
->obj_exec_link
);
4636 INIT_LIST_HEAD(&obj
->vma_list
);
4637 INIT_LIST_HEAD(&obj
->batch_pool_link
);
4641 obj
->fence_reg
= I915_FENCE_REG_NONE
;
4642 obj
->madv
= I915_MADV_WILLNEED
;
4644 i915_gem_info_add_obj(obj
->base
.dev
->dev_private
, obj
->base
.size
);
4647 static const struct drm_i915_gem_object_ops i915_gem_object_ops
= {
4648 .get_pages
= i915_gem_object_get_pages_gtt
,
4649 .put_pages
= i915_gem_object_put_pages_gtt
,
4652 struct drm_i915_gem_object
*i915_gem_alloc_object(struct drm_device
*dev
,
4655 struct drm_i915_gem_object
*obj
;
4656 struct address_space
*mapping
;
4659 obj
= i915_gem_object_alloc(dev
);
4663 if (drm_gem_object_init(dev
, &obj
->base
, size
) != 0) {
4664 i915_gem_object_free(obj
);
4668 mask
= GFP_HIGHUSER
| __GFP_RECLAIMABLE
;
4669 if (IS_CRESTLINE(dev
) || IS_BROADWATER(dev
)) {
4670 /* 965gm cannot relocate objects above 4GiB. */
4671 mask
&= ~__GFP_HIGHMEM
;
4672 mask
|= __GFP_DMA32
;
4675 mapping
= file_inode(obj
->base
.filp
)->i_mapping
;
4676 mapping_set_gfp_mask(mapping
, mask
);
4678 i915_gem_object_init(obj
, &i915_gem_object_ops
);
4680 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
4681 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
4684 /* On some devices, we can have the GPU use the LLC (the CPU
4685 * cache) for about a 10% performance improvement
4686 * compared to uncached. Graphics requests other than
4687 * display scanout are coherent with the CPU in
4688 * accessing this cache. This means in this mode we
4689 * don't need to clflush on the CPU side, and on the
4690 * GPU side we only need to flush internal caches to
4691 * get data visible to the CPU.
4693 * However, we maintain the display planes as UC, and so
4694 * need to rebind when first used as such.
4696 obj
->cache_level
= I915_CACHE_LLC
;
4698 obj
->cache_level
= I915_CACHE_NONE
;
4700 trace_i915_gem_object_create(obj
);
4705 static bool discard_backing_storage(struct drm_i915_gem_object
*obj
)
4707 /* If we are the last user of the backing storage (be it shmemfs
4708 * pages or stolen etc), we know that the pages are going to be
4709 * immediately released. In this case, we can then skip copying
4710 * back the contents from the GPU.
4713 if (obj
->madv
!= I915_MADV_WILLNEED
)
4716 if (obj
->base
.filp
== NULL
)
4719 /* At first glance, this looks racy, but then again so would be
4720 * userspace racing mmap against close. However, the first external
4721 * reference to the filp can only be obtained through the
4722 * i915_gem_mmap_ioctl() which safeguards us against the user
4723 * acquiring such a reference whilst we are in the middle of
4724 * freeing the object.
4726 return atomic_long_read(&obj
->base
.filp
->f_count
) == 1;
4729 void i915_gem_free_object(struct drm_gem_object
*gem_obj
)
4731 struct drm_i915_gem_object
*obj
= to_intel_bo(gem_obj
);
4732 struct drm_device
*dev
= obj
->base
.dev
;
4733 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4734 struct i915_vma
*vma
, *next
;
4736 intel_runtime_pm_get(dev_priv
);
4738 trace_i915_gem_object_destroy(obj
);
4740 list_for_each_entry_safe(vma
, next
, &obj
->vma_list
, vma_link
) {
4744 ret
= i915_vma_unbind(vma
);
4745 if (WARN_ON(ret
== -ERESTARTSYS
)) {
4746 bool was_interruptible
;
4748 was_interruptible
= dev_priv
->mm
.interruptible
;
4749 dev_priv
->mm
.interruptible
= false;
4751 WARN_ON(i915_vma_unbind(vma
));
4753 dev_priv
->mm
.interruptible
= was_interruptible
;
4757 /* Stolen objects don't hold a ref, but do hold pin count. Fix that up
4758 * before progressing. */
4760 i915_gem_object_unpin_pages(obj
);
4762 WARN_ON(obj
->frontbuffer_bits
);
4764 if (obj
->pages
&& obj
->madv
== I915_MADV_WILLNEED
&&
4765 dev_priv
->quirks
& QUIRK_PIN_SWIZZLED_PAGES
&&
4766 obj
->tiling_mode
!= I915_TILING_NONE
)
4767 i915_gem_object_unpin_pages(obj
);
4769 if (WARN_ON(obj
->pages_pin_count
))
4770 obj
->pages_pin_count
= 0;
4771 if (discard_backing_storage(obj
))
4772 obj
->madv
= I915_MADV_DONTNEED
;
4773 i915_gem_object_put_pages(obj
);
4774 i915_gem_object_free_mmap_offset(obj
);
4778 if (obj
->base
.import_attach
)
4779 drm_prime_gem_destroy(&obj
->base
, NULL
);
4781 if (obj
->ops
->release
)
4782 obj
->ops
->release(obj
);
4784 drm_gem_object_release(&obj
->base
);
4785 i915_gem_info_remove_obj(dev_priv
, obj
->base
.size
);
4788 i915_gem_object_free(obj
);
4790 intel_runtime_pm_put(dev_priv
);
4793 struct i915_vma
*i915_gem_obj_to_vma(struct drm_i915_gem_object
*obj
,
4794 struct i915_address_space
*vm
)
4796 struct i915_vma
*vma
;
4797 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
) {
4798 if (i915_is_ggtt(vma
->vm
) &&
4799 vma
->ggtt_view
.type
!= I915_GGTT_VIEW_NORMAL
)
4807 struct i915_vma
*i915_gem_obj_to_ggtt_view(struct drm_i915_gem_object
*obj
,
4808 const struct i915_ggtt_view
*view
)
4810 struct i915_address_space
*ggtt
= i915_obj_to_ggtt(obj
);
4811 struct i915_vma
*vma
;
4813 if (WARN_ONCE(!view
, "no view specified"))
4814 return ERR_PTR(-EINVAL
);
4816 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
)
4817 if (vma
->vm
== ggtt
&&
4818 i915_ggtt_view_equal(&vma
->ggtt_view
, view
))
4823 void i915_gem_vma_destroy(struct i915_vma
*vma
)
4825 struct i915_address_space
*vm
= NULL
;
4826 WARN_ON(vma
->node
.allocated
);
4828 /* Keep the vma as a placeholder in the execbuffer reservation lists */
4829 if (!list_empty(&vma
->exec_list
))
4834 if (!i915_is_ggtt(vm
))
4835 i915_ppgtt_put(i915_vm_to_ppgtt(vm
));
4837 list_del(&vma
->vma_link
);
4839 kmem_cache_free(to_i915(vma
->obj
->base
.dev
)->vmas
, vma
);
4843 i915_gem_stop_ringbuffers(struct drm_device
*dev
)
4845 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4846 struct intel_engine_cs
*ring
;
4849 for_each_ring(ring
, dev_priv
, i
)
4850 dev_priv
->gt
.stop_ring(ring
);
4854 i915_gem_suspend(struct drm_device
*dev
)
4856 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4859 mutex_lock(&dev
->struct_mutex
);
4860 ret
= i915_gpu_idle(dev
);
4864 i915_gem_retire_requests(dev
);
4866 i915_gem_stop_ringbuffers(dev
);
4867 mutex_unlock(&dev
->struct_mutex
);
4869 cancel_delayed_work_sync(&dev_priv
->gpu_error
.hangcheck_work
);
4870 cancel_delayed_work_sync(&dev_priv
->mm
.retire_work
);
4871 flush_delayed_work(&dev_priv
->mm
.idle_work
);
4873 /* Assert that we sucessfully flushed all the work and
4874 * reset the GPU back to its idle, low power state.
4876 WARN_ON(dev_priv
->mm
.busy
);
4881 mutex_unlock(&dev
->struct_mutex
);
4885 int i915_gem_l3_remap(struct drm_i915_gem_request
*req
, int slice
)
4887 struct intel_engine_cs
*ring
= req
->ring
;
4888 struct drm_device
*dev
= ring
->dev
;
4889 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4890 u32 reg_base
= GEN7_L3LOG_BASE
+ (slice
* 0x200);
4891 u32
*remap_info
= dev_priv
->l3_parity
.remap_info
[slice
];
4894 if (!HAS_L3_DPF(dev
) || !remap_info
)
4897 ret
= intel_ring_begin(ring
, GEN7_L3LOG_SIZE
/ 4 * 3);
4902 * Note: We do not worry about the concurrent register cacheline hang
4903 * here because no other code should access these registers other than
4904 * at initialization time.
4906 for (i
= 0; i
< GEN7_L3LOG_SIZE
; i
+= 4) {
4907 intel_ring_emit(ring
, MI_LOAD_REGISTER_IMM(1));
4908 intel_ring_emit(ring
, reg_base
+ i
);
4909 intel_ring_emit(ring
, remap_info
[i
/4]);
4912 intel_ring_advance(ring
);
4917 void i915_gem_init_swizzling(struct drm_device
*dev
)
4919 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4921 if (INTEL_INFO(dev
)->gen
< 5 ||
4922 dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_NONE
)
4925 I915_WRITE(DISP_ARB_CTL
, I915_READ(DISP_ARB_CTL
) |
4926 DISP_TILE_SURFACE_SWIZZLING
);
4931 I915_WRITE(TILECTL
, I915_READ(TILECTL
) | TILECTL_SWZCTL
);
4933 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB
));
4934 else if (IS_GEN7(dev
))
4935 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB
));
4936 else if (IS_GEN8(dev
))
4937 I915_WRITE(GAMTARBMODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_BDW
));
4943 intel_enable_blt(struct drm_device
*dev
)
4948 /* The blitter was dysfunctional on early prototypes */
4949 if (IS_GEN6(dev
) && dev
->pdev
->revision
< 8) {
4950 DRM_INFO("BLT not supported on this pre-production hardware;"
4951 " graphics performance will be degraded.\n");
4958 static void init_unused_ring(struct drm_device
*dev
, u32 base
)
4960 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4962 I915_WRITE(RING_CTL(base
), 0);
4963 I915_WRITE(RING_HEAD(base
), 0);
4964 I915_WRITE(RING_TAIL(base
), 0);
4965 I915_WRITE(RING_START(base
), 0);
4968 static void init_unused_rings(struct drm_device
*dev
)
4971 init_unused_ring(dev
, PRB1_BASE
);
4972 init_unused_ring(dev
, SRB0_BASE
);
4973 init_unused_ring(dev
, SRB1_BASE
);
4974 init_unused_ring(dev
, SRB2_BASE
);
4975 init_unused_ring(dev
, SRB3_BASE
);
4976 } else if (IS_GEN2(dev
)) {
4977 init_unused_ring(dev
, SRB0_BASE
);
4978 init_unused_ring(dev
, SRB1_BASE
);
4979 } else if (IS_GEN3(dev
)) {
4980 init_unused_ring(dev
, PRB1_BASE
);
4981 init_unused_ring(dev
, PRB2_BASE
);
4985 int i915_gem_init_rings(struct drm_device
*dev
)
4987 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4990 ret
= intel_init_render_ring_buffer(dev
);
4995 ret
= intel_init_bsd_ring_buffer(dev
);
4997 goto cleanup_render_ring
;
5000 if (intel_enable_blt(dev
)) {
5001 ret
= intel_init_blt_ring_buffer(dev
);
5003 goto cleanup_bsd_ring
;
5006 if (HAS_VEBOX(dev
)) {
5007 ret
= intel_init_vebox_ring_buffer(dev
);
5009 goto cleanup_blt_ring
;
5012 if (HAS_BSD2(dev
)) {
5013 ret
= intel_init_bsd2_ring_buffer(dev
);
5015 goto cleanup_vebox_ring
;
5018 ret
= i915_gem_set_seqno(dev
, ((u32
)~0 - 0x1000));
5020 goto cleanup_bsd2_ring
;
5025 intel_cleanup_ring_buffer(&dev_priv
->ring
[VCS2
]);
5027 intel_cleanup_ring_buffer(&dev_priv
->ring
[VECS
]);
5029 intel_cleanup_ring_buffer(&dev_priv
->ring
[BCS
]);
5031 intel_cleanup_ring_buffer(&dev_priv
->ring
[VCS
]);
5032 cleanup_render_ring
:
5033 intel_cleanup_ring_buffer(&dev_priv
->ring
[RCS
]);
5039 i915_gem_init_hw(struct drm_device
*dev
)
5041 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5042 struct intel_engine_cs
*ring
;
5045 if (INTEL_INFO(dev
)->gen
< 6 && !intel_enable_gtt())
5048 /* Double layer security blanket, see i915_gem_init() */
5049 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
5051 if (dev_priv
->ellc_size
)
5052 I915_WRITE(HSW_IDICR
, I915_READ(HSW_IDICR
) | IDIHASHMSK(0xf));
5054 if (IS_HASWELL(dev
))
5055 I915_WRITE(MI_PREDICATE_RESULT_2
, IS_HSW_GT3(dev
) ?
5056 LOWER_SLICE_ENABLED
: LOWER_SLICE_DISABLED
);
5058 if (HAS_PCH_NOP(dev
)) {
5059 if (IS_IVYBRIDGE(dev
)) {
5060 u32 temp
= I915_READ(GEN7_MSG_CTL
);
5061 temp
&= ~(WAIT_FOR_PCH_FLR_ACK
| WAIT_FOR_PCH_RESET_ACK
);
5062 I915_WRITE(GEN7_MSG_CTL
, temp
);
5063 } else if (INTEL_INFO(dev
)->gen
>= 7) {
5064 u32 temp
= I915_READ(HSW_NDE_RSTWRN_OPT
);
5065 temp
&= ~RESET_PCH_HANDSHAKE_ENABLE
;
5066 I915_WRITE(HSW_NDE_RSTWRN_OPT
, temp
);
5070 i915_gem_init_swizzling(dev
);
5073 * At least 830 can leave some of the unused rings
5074 * "active" (ie. head != tail) after resume which
5075 * will prevent c3 entry. Makes sure all unused rings
5078 init_unused_rings(dev
);
5080 BUG_ON(!dev_priv
->ring
[RCS
].default_context
);
5082 ret
= i915_ppgtt_init_hw(dev
);
5084 DRM_ERROR("PPGTT enable HW failed %d\n", ret
);
5088 /* Need to do basic initialisation of all rings first: */
5089 for_each_ring(ring
, dev_priv
, i
) {
5090 ret
= ring
->init_hw(ring
);
5095 /* Now it is safe to go back round and do everything else: */
5096 for_each_ring(ring
, dev_priv
, i
) {
5097 struct drm_i915_gem_request
*req
;
5099 WARN_ON(!ring
->default_context
);
5101 ret
= i915_gem_request_alloc(ring
, ring
->default_context
, &req
);
5103 i915_gem_cleanup_ringbuffer(dev
);
5107 if (ring
->id
== RCS
) {
5108 for (j
= 0; j
< NUM_L3_SLICES(dev
); j
++)
5109 i915_gem_l3_remap(req
, j
);
5112 ret
= i915_ppgtt_init_ring(req
);
5113 if (ret
&& ret
!= -EIO
) {
5114 DRM_ERROR("PPGTT enable ring #%d failed %d\n", i
, ret
);
5115 i915_gem_request_cancel(req
);
5116 i915_gem_cleanup_ringbuffer(dev
);
5120 ret
= i915_gem_context_enable(req
);
5121 if (ret
&& ret
!= -EIO
) {
5122 DRM_ERROR("Context enable ring #%d failed %d\n", i
, ret
);
5123 i915_gem_request_cancel(req
);
5124 i915_gem_cleanup_ringbuffer(dev
);
5128 i915_add_request_no_flush(req
);
5132 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
5136 int i915_gem_init(struct drm_device
*dev
)
5138 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5141 i915
.enable_execlists
= intel_sanitize_enable_execlists(dev
,
5142 i915
.enable_execlists
);
5144 mutex_lock(&dev
->struct_mutex
);
5146 if (IS_VALLEYVIEW(dev
)) {
5147 /* VLVA0 (potential hack), BIOS isn't actually waking us */
5148 I915_WRITE(VLV_GTLC_WAKE_CTRL
, VLV_GTLC_ALLOWWAKEREQ
);
5149 if (wait_for((I915_READ(VLV_GTLC_PW_STATUS
) &
5150 VLV_GTLC_ALLOWWAKEACK
), 10))
5151 DRM_DEBUG_DRIVER("allow wake ack timed out\n");
5154 if (!i915
.enable_execlists
) {
5155 dev_priv
->gt
.execbuf_submit
= i915_gem_ringbuffer_submission
;
5156 dev_priv
->gt
.init_rings
= i915_gem_init_rings
;
5157 dev_priv
->gt
.cleanup_ring
= intel_cleanup_ring_buffer
;
5158 dev_priv
->gt
.stop_ring
= intel_stop_ring_buffer
;
5160 dev_priv
->gt
.execbuf_submit
= intel_execlists_submission
;
5161 dev_priv
->gt
.init_rings
= intel_logical_rings_init
;
5162 dev_priv
->gt
.cleanup_ring
= intel_logical_ring_cleanup
;
5163 dev_priv
->gt
.stop_ring
= intel_logical_ring_stop
;
5166 /* This is just a security blanket to placate dragons.
5167 * On some systems, we very sporadically observe that the first TLBs
5168 * used by the CS may be stale, despite us poking the TLB reset. If
5169 * we hold the forcewake during initialisation these problems
5170 * just magically go away.
5172 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
5174 ret
= i915_gem_init_userptr(dev
);
5178 i915_gem_init_global_gtt(dev
);
5180 ret
= i915_gem_context_init(dev
);
5184 ret
= dev_priv
->gt
.init_rings(dev
);
5188 ret
= i915_gem_init_hw(dev
);
5190 /* Allow ring initialisation to fail by marking the GPU as
5191 * wedged. But we only want to do this where the GPU is angry,
5192 * for all other failure, such as an allocation failure, bail.
5194 DRM_ERROR("Failed to initialize GPU, declaring it wedged\n");
5195 atomic_set_mask(I915_WEDGED
, &dev_priv
->gpu_error
.reset_counter
);
5200 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
5201 mutex_unlock(&dev
->struct_mutex
);
5207 i915_gem_cleanup_ringbuffer(struct drm_device
*dev
)
5209 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5210 struct intel_engine_cs
*ring
;
5213 for_each_ring(ring
, dev_priv
, i
)
5214 dev_priv
->gt
.cleanup_ring(ring
);
5218 init_ring_lists(struct intel_engine_cs
*ring
)
5220 INIT_LIST_HEAD(&ring
->active_list
);
5221 INIT_LIST_HEAD(&ring
->request_list
);
5224 void i915_init_vm(struct drm_i915_private
*dev_priv
,
5225 struct i915_address_space
*vm
)
5227 if (!i915_is_ggtt(vm
))
5228 drm_mm_init(&vm
->mm
, vm
->start
, vm
->total
);
5229 vm
->dev
= dev_priv
->dev
;
5230 INIT_LIST_HEAD(&vm
->active_list
);
5231 INIT_LIST_HEAD(&vm
->inactive_list
);
5232 INIT_LIST_HEAD(&vm
->global_link
);
5233 list_add_tail(&vm
->global_link
, &dev_priv
->vm_list
);
5237 i915_gem_load(struct drm_device
*dev
)
5239 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5243 kmem_cache_create("i915_gem_object",
5244 sizeof(struct drm_i915_gem_object
), 0,
5248 kmem_cache_create("i915_gem_vma",
5249 sizeof(struct i915_vma
), 0,
5252 dev_priv
->requests
=
5253 kmem_cache_create("i915_gem_request",
5254 sizeof(struct drm_i915_gem_request
), 0,
5258 INIT_LIST_HEAD(&dev_priv
->vm_list
);
5259 i915_init_vm(dev_priv
, &dev_priv
->gtt
.base
);
5261 INIT_LIST_HEAD(&dev_priv
->context_list
);
5262 INIT_LIST_HEAD(&dev_priv
->mm
.unbound_list
);
5263 INIT_LIST_HEAD(&dev_priv
->mm
.bound_list
);
5264 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
5265 for (i
= 0; i
< I915_NUM_RINGS
; i
++)
5266 init_ring_lists(&dev_priv
->ring
[i
]);
5267 for (i
= 0; i
< I915_MAX_NUM_FENCES
; i
++)
5268 INIT_LIST_HEAD(&dev_priv
->fence_regs
[i
].lru_list
);
5269 INIT_DELAYED_WORK(&dev_priv
->mm
.retire_work
,
5270 i915_gem_retire_work_handler
);
5271 INIT_DELAYED_WORK(&dev_priv
->mm
.idle_work
,
5272 i915_gem_idle_work_handler
);
5273 init_waitqueue_head(&dev_priv
->gpu_error
.reset_queue
);
5275 dev_priv
->relative_constants_mode
= I915_EXEC_CONSTANTS_REL_GENERAL
;
5277 if (INTEL_INFO(dev
)->gen
>= 7 && !IS_VALLEYVIEW(dev
))
5278 dev_priv
->num_fence_regs
= 32;
5279 else if (INTEL_INFO(dev
)->gen
>= 4 || IS_I945G(dev
) || IS_I945GM(dev
) || IS_G33(dev
))
5280 dev_priv
->num_fence_regs
= 16;
5282 dev_priv
->num_fence_regs
= 8;
5284 if (intel_vgpu_active(dev
))
5285 dev_priv
->num_fence_regs
=
5286 I915_READ(vgtif_reg(avail_rs
.fence_num
));
5288 /* Initialize fence registers to zero */
5289 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
5290 i915_gem_restore_fences(dev
);
5292 i915_gem_detect_bit_6_swizzle(dev
);
5293 init_waitqueue_head(&dev_priv
->pending_flip_queue
);
5295 dev_priv
->mm
.interruptible
= true;
5297 i915_gem_shrinker_init(dev_priv
);
5299 mutex_init(&dev_priv
->fb_tracking
.lock
);
5302 void i915_gem_release(struct drm_device
*dev
, struct drm_file
*file
)
5304 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
5306 /* Clean up our request list when the client is going away, so that
5307 * later retire_requests won't dereference our soon-to-be-gone
5310 spin_lock(&file_priv
->mm
.lock
);
5311 while (!list_empty(&file_priv
->mm
.request_list
)) {
5312 struct drm_i915_gem_request
*request
;
5314 request
= list_first_entry(&file_priv
->mm
.request_list
,
5315 struct drm_i915_gem_request
,
5317 list_del(&request
->client_list
);
5318 request
->file_priv
= NULL
;
5320 spin_unlock(&file_priv
->mm
.lock
);
5322 if (!list_empty(&file_priv
->rps
.link
)) {
5323 spin_lock(&to_i915(dev
)->rps
.client_lock
);
5324 list_del(&file_priv
->rps
.link
);
5325 spin_unlock(&to_i915(dev
)->rps
.client_lock
);
5329 int i915_gem_open(struct drm_device
*dev
, struct drm_file
*file
)
5331 struct drm_i915_file_private
*file_priv
;
5334 DRM_DEBUG_DRIVER("\n");
5336 file_priv
= kzalloc(sizeof(*file_priv
), GFP_KERNEL
);
5340 file
->driver_priv
= file_priv
;
5341 file_priv
->dev_priv
= dev
->dev_private
;
5342 file_priv
->file
= file
;
5343 INIT_LIST_HEAD(&file_priv
->rps
.link
);
5345 spin_lock_init(&file_priv
->mm
.lock
);
5346 INIT_LIST_HEAD(&file_priv
->mm
.request_list
);
5348 ret
= i915_gem_context_open(dev
, file
);
5356 * i915_gem_track_fb - update frontbuffer tracking
5357 * old: current GEM buffer for the frontbuffer slots
5358 * new: new GEM buffer for the frontbuffer slots
5359 * frontbuffer_bits: bitmask of frontbuffer slots
5361 * This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them
5362 * from @old and setting them in @new. Both @old and @new can be NULL.
5364 void i915_gem_track_fb(struct drm_i915_gem_object
*old
,
5365 struct drm_i915_gem_object
*new,
5366 unsigned frontbuffer_bits
)
5369 WARN_ON(!mutex_is_locked(&old
->base
.dev
->struct_mutex
));
5370 WARN_ON(!(old
->frontbuffer_bits
& frontbuffer_bits
));
5371 old
->frontbuffer_bits
&= ~frontbuffer_bits
;
5375 WARN_ON(!mutex_is_locked(&new->base
.dev
->struct_mutex
));
5376 WARN_ON(new->frontbuffer_bits
& frontbuffer_bits
);
5377 new->frontbuffer_bits
|= frontbuffer_bits
;
5381 /* All the new VM stuff */
5383 i915_gem_obj_offset(struct drm_i915_gem_object
*o
,
5384 struct i915_address_space
*vm
)
5386 struct drm_i915_private
*dev_priv
= o
->base
.dev
->dev_private
;
5387 struct i915_vma
*vma
;
5389 WARN_ON(vm
== &dev_priv
->mm
.aliasing_ppgtt
->base
);
5391 list_for_each_entry(vma
, &o
->vma_list
, vma_link
) {
5392 if (i915_is_ggtt(vma
->vm
) &&
5393 vma
->ggtt_view
.type
!= I915_GGTT_VIEW_NORMAL
)
5396 return vma
->node
.start
;
5399 WARN(1, "%s vma for this object not found.\n",
5400 i915_is_ggtt(vm
) ? "global" : "ppgtt");
5405 i915_gem_obj_ggtt_offset_view(struct drm_i915_gem_object
*o
,
5406 const struct i915_ggtt_view
*view
)
5408 struct i915_address_space
*ggtt
= i915_obj_to_ggtt(o
);
5409 struct i915_vma
*vma
;
5411 list_for_each_entry(vma
, &o
->vma_list
, vma_link
)
5412 if (vma
->vm
== ggtt
&&
5413 i915_ggtt_view_equal(&vma
->ggtt_view
, view
))
5414 return vma
->node
.start
;
5416 WARN(1, "global vma for this object not found. (view=%u)\n", view
->type
);
5420 bool i915_gem_obj_bound(struct drm_i915_gem_object
*o
,
5421 struct i915_address_space
*vm
)
5423 struct i915_vma
*vma
;
5425 list_for_each_entry(vma
, &o
->vma_list
, vma_link
) {
5426 if (i915_is_ggtt(vma
->vm
) &&
5427 vma
->ggtt_view
.type
!= I915_GGTT_VIEW_NORMAL
)
5429 if (vma
->vm
== vm
&& drm_mm_node_allocated(&vma
->node
))
5436 bool i915_gem_obj_ggtt_bound_view(struct drm_i915_gem_object
*o
,
5437 const struct i915_ggtt_view
*view
)
5439 struct i915_address_space
*ggtt
= i915_obj_to_ggtt(o
);
5440 struct i915_vma
*vma
;
5442 list_for_each_entry(vma
, &o
->vma_list
, vma_link
)
5443 if (vma
->vm
== ggtt
&&
5444 i915_ggtt_view_equal(&vma
->ggtt_view
, view
) &&
5445 drm_mm_node_allocated(&vma
->node
))
5451 bool i915_gem_obj_bound_any(struct drm_i915_gem_object
*o
)
5453 struct i915_vma
*vma
;
5455 list_for_each_entry(vma
, &o
->vma_list
, vma_link
)
5456 if (drm_mm_node_allocated(&vma
->node
))
5462 unsigned long i915_gem_obj_size(struct drm_i915_gem_object
*o
,
5463 struct i915_address_space
*vm
)
5465 struct drm_i915_private
*dev_priv
= o
->base
.dev
->dev_private
;
5466 struct i915_vma
*vma
;
5468 WARN_ON(vm
== &dev_priv
->mm
.aliasing_ppgtt
->base
);
5470 BUG_ON(list_empty(&o
->vma_list
));
5472 list_for_each_entry(vma
, &o
->vma_list
, vma_link
) {
5473 if (i915_is_ggtt(vma
->vm
) &&
5474 vma
->ggtt_view
.type
!= I915_GGTT_VIEW_NORMAL
)
5477 return vma
->node
.size
;
5482 bool i915_gem_obj_is_pinned(struct drm_i915_gem_object
*obj
)
5484 struct i915_vma
*vma
;
5485 list_for_each_entry(vma
, &obj
->vma_list
, vma_link
)
5486 if (vma
->pin_count
> 0)