2 * Copyright © 2008 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eric Anholt <eric@anholt.net>
32 #include "i915_trace.h"
33 #include "intel_drv.h"
34 #include <linux/shmem_fs.h>
35 #include <linux/slab.h>
36 #include <linux/swap.h>
37 #include <linux/pci.h>
38 #include <linux/dma-buf.h>
40 static __must_check
int i915_gem_object_flush_gpu_write_domain(struct drm_i915_gem_object
*obj
);
41 static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
);
42 static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
);
43 static __must_check
int i915_gem_object_bind_to_gtt(struct drm_i915_gem_object
*obj
,
45 bool map_and_fenceable
);
46 static int i915_gem_phys_pwrite(struct drm_device
*dev
,
47 struct drm_i915_gem_object
*obj
,
48 struct drm_i915_gem_pwrite
*args
,
49 struct drm_file
*file
);
51 static void i915_gem_write_fence(struct drm_device
*dev
, int reg
,
52 struct drm_i915_gem_object
*obj
);
53 static void i915_gem_object_update_fence(struct drm_i915_gem_object
*obj
,
54 struct drm_i915_fence_reg
*fence
,
57 static int i915_gem_inactive_shrink(struct shrinker
*shrinker
,
58 struct shrink_control
*sc
);
59 static void i915_gem_object_truncate(struct drm_i915_gem_object
*obj
);
61 static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object
*obj
)
64 i915_gem_release_mmap(obj
);
66 /* As we do not have an associated fence register, we will force
67 * a tiling change if we ever need to acquire one.
69 obj
->fence_dirty
= false;
70 obj
->fence_reg
= I915_FENCE_REG_NONE
;
73 /* some bookkeeping */
74 static void i915_gem_info_add_obj(struct drm_i915_private
*dev_priv
,
77 dev_priv
->mm
.object_count
++;
78 dev_priv
->mm
.object_memory
+= size
;
81 static void i915_gem_info_remove_obj(struct drm_i915_private
*dev_priv
,
84 dev_priv
->mm
.object_count
--;
85 dev_priv
->mm
.object_memory
-= size
;
89 i915_gem_wait_for_error(struct drm_device
*dev
)
91 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
92 struct completion
*x
= &dev_priv
->error_completion
;
96 if (!atomic_read(&dev_priv
->mm
.wedged
))
99 ret
= wait_for_completion_interruptible(x
);
103 if (atomic_read(&dev_priv
->mm
.wedged
)) {
104 /* GPU is hung, bump the completion count to account for
105 * the token we just consumed so that we never hit zero and
106 * end up waiting upon a subsequent completion event that
109 spin_lock_irqsave(&x
->wait
.lock
, flags
);
111 spin_unlock_irqrestore(&x
->wait
.lock
, flags
);
116 int i915_mutex_lock_interruptible(struct drm_device
*dev
)
120 ret
= i915_gem_wait_for_error(dev
);
124 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
128 WARN_ON(i915_verify_lists(dev
));
133 i915_gem_object_is_inactive(struct drm_i915_gem_object
*obj
)
139 i915_gem_init_ioctl(struct drm_device
*dev
, void *data
,
140 struct drm_file
*file
)
142 struct drm_i915_gem_init
*args
= data
;
144 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
147 if (args
->gtt_start
>= args
->gtt_end
||
148 (args
->gtt_end
| args
->gtt_start
) & (PAGE_SIZE
- 1))
151 /* GEM with user mode setting was never supported on ilk and later. */
152 if (INTEL_INFO(dev
)->gen
>= 5)
155 mutex_lock(&dev
->struct_mutex
);
156 i915_gem_init_global_gtt(dev
, args
->gtt_start
,
157 args
->gtt_end
, args
->gtt_end
);
158 mutex_unlock(&dev
->struct_mutex
);
164 i915_gem_get_aperture_ioctl(struct drm_device
*dev
, void *data
,
165 struct drm_file
*file
)
167 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
168 struct drm_i915_gem_get_aperture
*args
= data
;
169 struct drm_i915_gem_object
*obj
;
173 mutex_lock(&dev
->struct_mutex
);
174 list_for_each_entry(obj
, &dev_priv
->mm
.gtt_list
, gtt_list
)
176 pinned
+= obj
->gtt_space
->size
;
177 mutex_unlock(&dev
->struct_mutex
);
179 args
->aper_size
= dev_priv
->mm
.gtt_total
;
180 args
->aper_available_size
= args
->aper_size
- pinned
;
186 i915_gem_create(struct drm_file
*file
,
187 struct drm_device
*dev
,
191 struct drm_i915_gem_object
*obj
;
195 size
= roundup(size
, PAGE_SIZE
);
199 /* Allocate the new object */
200 obj
= i915_gem_alloc_object(dev
, size
);
204 ret
= drm_gem_handle_create(file
, &obj
->base
, &handle
);
206 drm_gem_object_release(&obj
->base
);
207 i915_gem_info_remove_obj(dev
->dev_private
, obj
->base
.size
);
212 /* drop reference from allocate - handle holds it now */
213 drm_gem_object_unreference(&obj
->base
);
214 trace_i915_gem_object_create(obj
);
221 i915_gem_dumb_create(struct drm_file
*file
,
222 struct drm_device
*dev
,
223 struct drm_mode_create_dumb
*args
)
225 /* have to work out size/pitch and return them */
226 args
->pitch
= ALIGN(args
->width
* ((args
->bpp
+ 7) / 8), 64);
227 args
->size
= args
->pitch
* args
->height
;
228 return i915_gem_create(file
, dev
,
229 args
->size
, &args
->handle
);
232 int i915_gem_dumb_destroy(struct drm_file
*file
,
233 struct drm_device
*dev
,
236 return drm_gem_handle_delete(file
, handle
);
240 * Creates a new mm object and returns a handle to it.
243 i915_gem_create_ioctl(struct drm_device
*dev
, void *data
,
244 struct drm_file
*file
)
246 struct drm_i915_gem_create
*args
= data
;
248 return i915_gem_create(file
, dev
,
249 args
->size
, &args
->handle
);
252 static int i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object
*obj
)
254 drm_i915_private_t
*dev_priv
= obj
->base
.dev
->dev_private
;
256 return dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_9_10_17
&&
257 obj
->tiling_mode
!= I915_TILING_NONE
;
261 __copy_to_user_swizzled(char __user
*cpu_vaddr
,
262 const char *gpu_vaddr
, int gpu_offset
,
265 int ret
, cpu_offset
= 0;
268 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
269 int this_length
= min(cacheline_end
- gpu_offset
, length
);
270 int swizzled_gpu_offset
= gpu_offset
^ 64;
272 ret
= __copy_to_user(cpu_vaddr
+ cpu_offset
,
273 gpu_vaddr
+ swizzled_gpu_offset
,
278 cpu_offset
+= this_length
;
279 gpu_offset
+= this_length
;
280 length
-= this_length
;
287 __copy_from_user_swizzled(char *gpu_vaddr
, int gpu_offset
,
288 const char __user
*cpu_vaddr
,
291 int ret
, cpu_offset
= 0;
294 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
295 int this_length
= min(cacheline_end
- gpu_offset
, length
);
296 int swizzled_gpu_offset
= gpu_offset
^ 64;
298 ret
= __copy_from_user(gpu_vaddr
+ swizzled_gpu_offset
,
299 cpu_vaddr
+ cpu_offset
,
304 cpu_offset
+= this_length
;
305 gpu_offset
+= this_length
;
306 length
-= this_length
;
312 /* Per-page copy function for the shmem pread fastpath.
313 * Flushes invalid cachelines before reading the target if
314 * needs_clflush is set. */
316 shmem_pread_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
317 char __user
*user_data
,
318 bool page_do_bit17_swizzling
, bool needs_clflush
)
323 if (unlikely(page_do_bit17_swizzling
))
326 vaddr
= kmap_atomic(page
);
328 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
330 ret
= __copy_to_user_inatomic(user_data
,
331 vaddr
+ shmem_page_offset
,
333 kunmap_atomic(vaddr
);
339 shmem_clflush_swizzled_range(char *addr
, unsigned long length
,
342 if (unlikely(swizzled
)) {
343 unsigned long start
= (unsigned long) addr
;
344 unsigned long end
= (unsigned long) addr
+ length
;
346 /* For swizzling simply ensure that we always flush both
347 * channels. Lame, but simple and it works. Swizzled
348 * pwrite/pread is far from a hotpath - current userspace
349 * doesn't use it at all. */
350 start
= round_down(start
, 128);
351 end
= round_up(end
, 128);
353 drm_clflush_virt_range((void *)start
, end
- start
);
355 drm_clflush_virt_range(addr
, length
);
360 /* Only difference to the fast-path function is that this can handle bit17
361 * and uses non-atomic copy and kmap functions. */
363 shmem_pread_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
364 char __user
*user_data
,
365 bool page_do_bit17_swizzling
, bool needs_clflush
)
372 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
374 page_do_bit17_swizzling
);
376 if (page_do_bit17_swizzling
)
377 ret
= __copy_to_user_swizzled(user_data
,
378 vaddr
, shmem_page_offset
,
381 ret
= __copy_to_user(user_data
,
382 vaddr
+ shmem_page_offset
,
390 i915_gem_shmem_pread(struct drm_device
*dev
,
391 struct drm_i915_gem_object
*obj
,
392 struct drm_i915_gem_pread
*args
,
393 struct drm_file
*file
)
395 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
396 char __user
*user_data
;
399 int shmem_page_offset
, page_length
, ret
= 0;
400 int obj_do_bit17_swizzling
, page_do_bit17_swizzling
;
401 int hit_slowpath
= 0;
403 int needs_clflush
= 0;
406 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
409 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
411 if (!(obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
)) {
412 /* If we're not in the cpu read domain, set ourself into the gtt
413 * read domain and manually flush cachelines (if required). This
414 * optimizes for the case when the gpu will dirty the data
415 * anyway again before the next pread happens. */
416 if (obj
->cache_level
== I915_CACHE_NONE
)
418 ret
= i915_gem_object_set_to_gtt_domain(obj
, false);
423 offset
= args
->offset
;
428 /* Operation in this page
430 * shmem_page_offset = offset within page in shmem file
431 * page_length = bytes to copy for this page
433 shmem_page_offset
= offset_in_page(offset
);
434 page_length
= remain
;
435 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
436 page_length
= PAGE_SIZE
- shmem_page_offset
;
439 page
= obj
->pages
[offset
>> PAGE_SHIFT
];
442 page
= shmem_read_mapping_page(mapping
, offset
>> PAGE_SHIFT
);
450 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
451 (page_to_phys(page
) & (1 << 17)) != 0;
453 ret
= shmem_pread_fast(page
, shmem_page_offset
, page_length
,
454 user_data
, page_do_bit17_swizzling
,
460 page_cache_get(page
);
461 mutex_unlock(&dev
->struct_mutex
);
464 ret
= fault_in_multipages_writeable(user_data
, remain
);
465 /* Userspace is tricking us, but we've already clobbered
466 * its pages with the prefault and promised to write the
467 * data up to the first fault. Hence ignore any errors
468 * and just continue. */
473 ret
= shmem_pread_slow(page
, shmem_page_offset
, page_length
,
474 user_data
, page_do_bit17_swizzling
,
477 mutex_lock(&dev
->struct_mutex
);
478 page_cache_release(page
);
480 mark_page_accessed(page
);
482 page_cache_release(page
);
489 remain
-= page_length
;
490 user_data
+= page_length
;
491 offset
+= page_length
;
496 /* Fixup: Kill any reinstated backing storage pages */
497 if (obj
->madv
== __I915_MADV_PURGED
)
498 i915_gem_object_truncate(obj
);
505 * Reads data from the object referenced by handle.
507 * On error, the contents of *data are undefined.
510 i915_gem_pread_ioctl(struct drm_device
*dev
, void *data
,
511 struct drm_file
*file
)
513 struct drm_i915_gem_pread
*args
= data
;
514 struct drm_i915_gem_object
*obj
;
520 if (!access_ok(VERIFY_WRITE
,
521 (char __user
*)(uintptr_t)args
->data_ptr
,
525 ret
= i915_mutex_lock_interruptible(dev
);
529 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
530 if (&obj
->base
== NULL
) {
535 /* Bounds check source. */
536 if (args
->offset
> obj
->base
.size
||
537 args
->size
> obj
->base
.size
- args
->offset
) {
542 /* prime objects have no backing filp to GEM pread/pwrite
545 if (!obj
->base
.filp
) {
550 trace_i915_gem_object_pread(obj
, args
->offset
, args
->size
);
552 ret
= i915_gem_shmem_pread(dev
, obj
, args
, file
);
555 drm_gem_object_unreference(&obj
->base
);
557 mutex_unlock(&dev
->struct_mutex
);
561 /* This is the fast write path which cannot handle
562 * page faults in the source data
566 fast_user_write(struct io_mapping
*mapping
,
567 loff_t page_base
, int page_offset
,
568 char __user
*user_data
,
571 void __iomem
*vaddr_atomic
;
573 unsigned long unwritten
;
575 vaddr_atomic
= io_mapping_map_atomic_wc(mapping
, page_base
);
576 /* We can use the cpu mem copy function because this is X86. */
577 vaddr
= (void __force
*)vaddr_atomic
+ page_offset
;
578 unwritten
= __copy_from_user_inatomic_nocache(vaddr
,
580 io_mapping_unmap_atomic(vaddr_atomic
);
585 * This is the fast pwrite path, where we copy the data directly from the
586 * user into the GTT, uncached.
589 i915_gem_gtt_pwrite_fast(struct drm_device
*dev
,
590 struct drm_i915_gem_object
*obj
,
591 struct drm_i915_gem_pwrite
*args
,
592 struct drm_file
*file
)
594 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
596 loff_t offset
, page_base
;
597 char __user
*user_data
;
598 int page_offset
, page_length
, ret
;
600 ret
= i915_gem_object_pin(obj
, 0, true);
604 ret
= i915_gem_object_set_to_gtt_domain(obj
, true);
608 ret
= i915_gem_object_put_fence(obj
);
612 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
615 offset
= obj
->gtt_offset
+ args
->offset
;
618 /* Operation in this page
620 * page_base = page offset within aperture
621 * page_offset = offset within page
622 * page_length = bytes to copy for this page
624 page_base
= offset
& PAGE_MASK
;
625 page_offset
= offset_in_page(offset
);
626 page_length
= remain
;
627 if ((page_offset
+ remain
) > PAGE_SIZE
)
628 page_length
= PAGE_SIZE
- page_offset
;
630 /* If we get a fault while copying data, then (presumably) our
631 * source page isn't available. Return the error and we'll
632 * retry in the slow path.
634 if (fast_user_write(dev_priv
->mm
.gtt_mapping
, page_base
,
635 page_offset
, user_data
, page_length
)) {
640 remain
-= page_length
;
641 user_data
+= page_length
;
642 offset
+= page_length
;
646 i915_gem_object_unpin(obj
);
651 /* Per-page copy function for the shmem pwrite fastpath.
652 * Flushes invalid cachelines before writing to the target if
653 * needs_clflush_before is set and flushes out any written cachelines after
654 * writing if needs_clflush is set. */
656 shmem_pwrite_fast(struct page
*page
, int shmem_page_offset
, int page_length
,
657 char __user
*user_data
,
658 bool page_do_bit17_swizzling
,
659 bool needs_clflush_before
,
660 bool needs_clflush_after
)
665 if (unlikely(page_do_bit17_swizzling
))
668 vaddr
= kmap_atomic(page
);
669 if (needs_clflush_before
)
670 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
672 ret
= __copy_from_user_inatomic_nocache(vaddr
+ shmem_page_offset
,
675 if (needs_clflush_after
)
676 drm_clflush_virt_range(vaddr
+ shmem_page_offset
,
678 kunmap_atomic(vaddr
);
683 /* Only difference to the fast-path function is that this can handle bit17
684 * and uses non-atomic copy and kmap functions. */
686 shmem_pwrite_slow(struct page
*page
, int shmem_page_offset
, int page_length
,
687 char __user
*user_data
,
688 bool page_do_bit17_swizzling
,
689 bool needs_clflush_before
,
690 bool needs_clflush_after
)
696 if (unlikely(needs_clflush_before
|| page_do_bit17_swizzling
))
697 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
699 page_do_bit17_swizzling
);
700 if (page_do_bit17_swizzling
)
701 ret
= __copy_from_user_swizzled(vaddr
, shmem_page_offset
,
705 ret
= __copy_from_user(vaddr
+ shmem_page_offset
,
708 if (needs_clflush_after
)
709 shmem_clflush_swizzled_range(vaddr
+ shmem_page_offset
,
711 page_do_bit17_swizzling
);
718 i915_gem_shmem_pwrite(struct drm_device
*dev
,
719 struct drm_i915_gem_object
*obj
,
720 struct drm_i915_gem_pwrite
*args
,
721 struct drm_file
*file
)
723 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
726 char __user
*user_data
;
727 int shmem_page_offset
, page_length
, ret
= 0;
728 int obj_do_bit17_swizzling
, page_do_bit17_swizzling
;
729 int hit_slowpath
= 0;
730 int needs_clflush_after
= 0;
731 int needs_clflush_before
= 0;
734 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
737 obj_do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
739 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
740 /* If we're not in the cpu write domain, set ourself into the gtt
741 * write domain and manually flush cachelines (if required). This
742 * optimizes for the case when the gpu will use the data
743 * right away and we therefore have to clflush anyway. */
744 if (obj
->cache_level
== I915_CACHE_NONE
)
745 needs_clflush_after
= 1;
746 ret
= i915_gem_object_set_to_gtt_domain(obj
, true);
750 /* Same trick applies for invalidate partially written cachelines before
752 if (!(obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
)
753 && obj
->cache_level
== I915_CACHE_NONE
)
754 needs_clflush_before
= 1;
756 offset
= args
->offset
;
761 int partial_cacheline_write
;
763 /* Operation in this page
765 * shmem_page_offset = offset within page in shmem file
766 * page_length = bytes to copy for this page
768 shmem_page_offset
= offset_in_page(offset
);
770 page_length
= remain
;
771 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
772 page_length
= PAGE_SIZE
- shmem_page_offset
;
774 /* If we don't overwrite a cacheline completely we need to be
775 * careful to have up-to-date data by first clflushing. Don't
776 * overcomplicate things and flush the entire patch. */
777 partial_cacheline_write
= needs_clflush_before
&&
778 ((shmem_page_offset
| page_length
)
779 & (boot_cpu_data
.x86_clflush_size
- 1));
782 page
= obj
->pages
[offset
>> PAGE_SHIFT
];
785 page
= shmem_read_mapping_page(mapping
, offset
>> PAGE_SHIFT
);
793 page_do_bit17_swizzling
= obj_do_bit17_swizzling
&&
794 (page_to_phys(page
) & (1 << 17)) != 0;
796 ret
= shmem_pwrite_fast(page
, shmem_page_offset
, page_length
,
797 user_data
, page_do_bit17_swizzling
,
798 partial_cacheline_write
,
799 needs_clflush_after
);
804 page_cache_get(page
);
805 mutex_unlock(&dev
->struct_mutex
);
807 ret
= shmem_pwrite_slow(page
, shmem_page_offset
, page_length
,
808 user_data
, page_do_bit17_swizzling
,
809 partial_cacheline_write
,
810 needs_clflush_after
);
812 mutex_lock(&dev
->struct_mutex
);
813 page_cache_release(page
);
815 set_page_dirty(page
);
816 mark_page_accessed(page
);
818 page_cache_release(page
);
825 remain
-= page_length
;
826 user_data
+= page_length
;
827 offset
+= page_length
;
832 /* Fixup: Kill any reinstated backing storage pages */
833 if (obj
->madv
== __I915_MADV_PURGED
)
834 i915_gem_object_truncate(obj
);
835 /* and flush dirty cachelines in case the object isn't in the cpu write
837 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
838 i915_gem_clflush_object(obj
);
839 intel_gtt_chipset_flush();
843 if (needs_clflush_after
)
844 intel_gtt_chipset_flush();
850 * Writes data to the object referenced by handle.
852 * On error, the contents of the buffer that were to be modified are undefined.
855 i915_gem_pwrite_ioctl(struct drm_device
*dev
, void *data
,
856 struct drm_file
*file
)
858 struct drm_i915_gem_pwrite
*args
= data
;
859 struct drm_i915_gem_object
*obj
;
865 if (!access_ok(VERIFY_READ
,
866 (char __user
*)(uintptr_t)args
->data_ptr
,
870 ret
= fault_in_multipages_readable((char __user
*)(uintptr_t)args
->data_ptr
,
875 ret
= i915_mutex_lock_interruptible(dev
);
879 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
880 if (&obj
->base
== NULL
) {
885 /* Bounds check destination. */
886 if (args
->offset
> obj
->base
.size
||
887 args
->size
> obj
->base
.size
- args
->offset
) {
892 /* prime objects have no backing filp to GEM pread/pwrite
895 if (!obj
->base
.filp
) {
900 trace_i915_gem_object_pwrite(obj
, args
->offset
, args
->size
);
903 /* We can only do the GTT pwrite on untiled buffers, as otherwise
904 * it would end up going through the fenced access, and we'll get
905 * different detiling behavior between reading and writing.
906 * pread/pwrite currently are reading and writing from the CPU
907 * perspective, requiring manual detiling by the client.
910 ret
= i915_gem_phys_pwrite(dev
, obj
, args
, file
);
914 if (obj
->gtt_space
&&
915 obj
->cache_level
== I915_CACHE_NONE
&&
916 obj
->tiling_mode
== I915_TILING_NONE
&&
917 obj
->map_and_fenceable
&&
918 obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
) {
919 ret
= i915_gem_gtt_pwrite_fast(dev
, obj
, args
, file
);
920 /* Note that the gtt paths might fail with non-page-backed user
921 * pointers (e.g. gtt mappings when moving data between
922 * textures). Fallback to the shmem path in that case. */
926 ret
= i915_gem_shmem_pwrite(dev
, obj
, args
, file
);
929 drm_gem_object_unreference(&obj
->base
);
931 mutex_unlock(&dev
->struct_mutex
);
936 * Called when user space prepares to use an object with the CPU, either
937 * through the mmap ioctl's mapping or a GTT mapping.
940 i915_gem_set_domain_ioctl(struct drm_device
*dev
, void *data
,
941 struct drm_file
*file
)
943 struct drm_i915_gem_set_domain
*args
= data
;
944 struct drm_i915_gem_object
*obj
;
945 uint32_t read_domains
= args
->read_domains
;
946 uint32_t write_domain
= args
->write_domain
;
949 /* Only handle setting domains to types used by the CPU. */
950 if (write_domain
& I915_GEM_GPU_DOMAINS
)
953 if (read_domains
& I915_GEM_GPU_DOMAINS
)
956 /* Having something in the write domain implies it's in the read
957 * domain, and only that read domain. Enforce that in the request.
959 if (write_domain
!= 0 && read_domains
!= write_domain
)
962 ret
= i915_mutex_lock_interruptible(dev
);
966 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
967 if (&obj
->base
== NULL
) {
972 if (read_domains
& I915_GEM_DOMAIN_GTT
) {
973 ret
= i915_gem_object_set_to_gtt_domain(obj
, write_domain
!= 0);
975 /* Silently promote "you're not bound, there was nothing to do"
976 * to success, since the client was just asking us to
977 * make sure everything was done.
982 ret
= i915_gem_object_set_to_cpu_domain(obj
, write_domain
!= 0);
985 drm_gem_object_unreference(&obj
->base
);
987 mutex_unlock(&dev
->struct_mutex
);
992 * Called when user space has done writes to this buffer
995 i915_gem_sw_finish_ioctl(struct drm_device
*dev
, void *data
,
996 struct drm_file
*file
)
998 struct drm_i915_gem_sw_finish
*args
= data
;
999 struct drm_i915_gem_object
*obj
;
1002 ret
= i915_mutex_lock_interruptible(dev
);
1006 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
1007 if (&obj
->base
== NULL
) {
1012 /* Pinned buffers may be scanout, so flush the cache */
1014 i915_gem_object_flush_cpu_write_domain(obj
);
1016 drm_gem_object_unreference(&obj
->base
);
1018 mutex_unlock(&dev
->struct_mutex
);
1023 * Maps the contents of an object, returning the address it is mapped
1026 * While the mapping holds a reference on the contents of the object, it doesn't
1027 * imply a ref on the object itself.
1030 i915_gem_mmap_ioctl(struct drm_device
*dev
, void *data
,
1031 struct drm_file
*file
)
1033 struct drm_i915_gem_mmap
*args
= data
;
1034 struct drm_gem_object
*obj
;
1037 obj
= drm_gem_object_lookup(dev
, file
, args
->handle
);
1041 /* prime objects have no backing filp to GEM mmap
1045 drm_gem_object_unreference_unlocked(obj
);
1049 addr
= vm_mmap(obj
->filp
, 0, args
->size
,
1050 PROT_READ
| PROT_WRITE
, MAP_SHARED
,
1052 drm_gem_object_unreference_unlocked(obj
);
1053 if (IS_ERR((void *)addr
))
1056 args
->addr_ptr
= (uint64_t) addr
;
1062 * i915_gem_fault - fault a page into the GTT
1063 * vma: VMA in question
1066 * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped
1067 * from userspace. The fault handler takes care of binding the object to
1068 * the GTT (if needed), allocating and programming a fence register (again,
1069 * only if needed based on whether the old reg is still valid or the object
1070 * is tiled) and inserting a new PTE into the faulting process.
1072 * Note that the faulting process may involve evicting existing objects
1073 * from the GTT and/or fence registers to make room. So performance may
1074 * suffer if the GTT working set is large or there are few fence registers
1077 int i915_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
1079 struct drm_i915_gem_object
*obj
= to_intel_bo(vma
->vm_private_data
);
1080 struct drm_device
*dev
= obj
->base
.dev
;
1081 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1082 pgoff_t page_offset
;
1085 bool write
= !!(vmf
->flags
& FAULT_FLAG_WRITE
);
1087 /* We don't use vmf->pgoff since that has the fake offset */
1088 page_offset
= ((unsigned long)vmf
->virtual_address
- vma
->vm_start
) >>
1091 ret
= i915_mutex_lock_interruptible(dev
);
1095 trace_i915_gem_object_fault(obj
, page_offset
, true, write
);
1097 /* Now bind it into the GTT if needed */
1098 if (!obj
->map_and_fenceable
) {
1099 ret
= i915_gem_object_unbind(obj
);
1103 if (!obj
->gtt_space
) {
1104 ret
= i915_gem_object_bind_to_gtt(obj
, 0, true);
1108 ret
= i915_gem_object_set_to_gtt_domain(obj
, write
);
1113 if (!obj
->has_global_gtt_mapping
)
1114 i915_gem_gtt_bind_object(obj
, obj
->cache_level
);
1116 ret
= i915_gem_object_get_fence(obj
);
1120 if (i915_gem_object_is_inactive(obj
))
1121 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
1123 obj
->fault_mappable
= true;
1125 pfn
= ((dev_priv
->mm
.gtt_base_addr
+ obj
->gtt_offset
) >> PAGE_SHIFT
) +
1128 /* Finally, remap it using the new GTT offset */
1129 ret
= vm_insert_pfn(vma
, (unsigned long)vmf
->virtual_address
, pfn
);
1131 mutex_unlock(&dev
->struct_mutex
);
1136 /* Give the error handler a chance to run and move the
1137 * objects off the GPU active list. Next time we service the
1138 * fault, we should be able to transition the page into the
1139 * GTT without touching the GPU (and so avoid further
1140 * EIO/EGAIN). If the GPU is wedged, then there is no issue
1141 * with coherency, just lost writes.
1147 return VM_FAULT_NOPAGE
;
1149 return VM_FAULT_OOM
;
1151 return VM_FAULT_SIGBUS
;
1156 * i915_gem_release_mmap - remove physical page mappings
1157 * @obj: obj in question
1159 * Preserve the reservation of the mmapping with the DRM core code, but
1160 * relinquish ownership of the pages back to the system.
1162 * It is vital that we remove the page mapping if we have mapped a tiled
1163 * object through the GTT and then lose the fence register due to
1164 * resource pressure. Similarly if the object has been moved out of the
1165 * aperture, than pages mapped into userspace must be revoked. Removing the
1166 * mapping will then trigger a page fault on the next user access, allowing
1167 * fixup by i915_gem_fault().
1170 i915_gem_release_mmap(struct drm_i915_gem_object
*obj
)
1172 if (!obj
->fault_mappable
)
1175 if (obj
->base
.dev
->dev_mapping
)
1176 unmap_mapping_range(obj
->base
.dev
->dev_mapping
,
1177 (loff_t
)obj
->base
.map_list
.hash
.key
<<PAGE_SHIFT
,
1180 obj
->fault_mappable
= false;
1184 i915_gem_get_gtt_size(struct drm_device
*dev
, uint32_t size
, int tiling_mode
)
1188 if (INTEL_INFO(dev
)->gen
>= 4 ||
1189 tiling_mode
== I915_TILING_NONE
)
1192 /* Previous chips need a power-of-two fence region when tiling */
1193 if (INTEL_INFO(dev
)->gen
== 3)
1194 gtt_size
= 1024*1024;
1196 gtt_size
= 512*1024;
1198 while (gtt_size
< size
)
1205 * i915_gem_get_gtt_alignment - return required GTT alignment for an object
1206 * @obj: object to check
1208 * Return the required GTT alignment for an object, taking into account
1209 * potential fence register mapping.
1212 i915_gem_get_gtt_alignment(struct drm_device
*dev
,
1217 * Minimum alignment is 4k (GTT page size), but might be greater
1218 * if a fence register is needed for the object.
1220 if (INTEL_INFO(dev
)->gen
>= 4 ||
1221 tiling_mode
== I915_TILING_NONE
)
1225 * Previous chips need to be aligned to the size of the smallest
1226 * fence register that can contain the object.
1228 return i915_gem_get_gtt_size(dev
, size
, tiling_mode
);
1232 * i915_gem_get_unfenced_gtt_alignment - return required GTT alignment for an
1235 * @size: size of the object
1236 * @tiling_mode: tiling mode of the object
1238 * Return the required GTT alignment for an object, only taking into account
1239 * unfenced tiled surface requirements.
1242 i915_gem_get_unfenced_gtt_alignment(struct drm_device
*dev
,
1247 * Minimum alignment is 4k (GTT page size) for sane hw.
1249 if (INTEL_INFO(dev
)->gen
>= 4 || IS_G33(dev
) ||
1250 tiling_mode
== I915_TILING_NONE
)
1253 /* Previous hardware however needs to be aligned to a power-of-two
1254 * tile height. The simplest method for determining this is to reuse
1255 * the power-of-tile object size.
1257 return i915_gem_get_gtt_size(dev
, size
, tiling_mode
);
1261 i915_gem_mmap_gtt(struct drm_file
*file
,
1262 struct drm_device
*dev
,
1266 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1267 struct drm_i915_gem_object
*obj
;
1270 ret
= i915_mutex_lock_interruptible(dev
);
1274 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, handle
));
1275 if (&obj
->base
== NULL
) {
1280 if (obj
->base
.size
> dev_priv
->mm
.gtt_mappable_end
) {
1285 if (obj
->madv
!= I915_MADV_WILLNEED
) {
1286 DRM_ERROR("Attempting to mmap a purgeable buffer\n");
1291 if (!obj
->base
.map_list
.map
) {
1292 ret
= drm_gem_create_mmap_offset(&obj
->base
);
1297 *offset
= (u64
)obj
->base
.map_list
.hash
.key
<< PAGE_SHIFT
;
1300 drm_gem_object_unreference(&obj
->base
);
1302 mutex_unlock(&dev
->struct_mutex
);
1307 * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing
1309 * @data: GTT mapping ioctl data
1310 * @file: GEM object info
1312 * Simply returns the fake offset to userspace so it can mmap it.
1313 * The mmap call will end up in drm_gem_mmap(), which will set things
1314 * up so we can get faults in the handler above.
1316 * The fault handler will take care of binding the object into the GTT
1317 * (since it may have been evicted to make room for something), allocating
1318 * a fence register, and mapping the appropriate aperture address into
1322 i915_gem_mmap_gtt_ioctl(struct drm_device
*dev
, void *data
,
1323 struct drm_file
*file
)
1325 struct drm_i915_gem_mmap_gtt
*args
= data
;
1327 return i915_gem_mmap_gtt(file
, dev
, args
->handle
, &args
->offset
);
1331 i915_gem_object_get_pages_gtt(struct drm_i915_gem_object
*obj
,
1335 struct address_space
*mapping
;
1336 struct inode
*inode
;
1339 if (obj
->pages
|| obj
->sg_table
)
1342 /* Get the list of pages out of our struct file. They'll be pinned
1343 * at this point until we release them.
1345 page_count
= obj
->base
.size
/ PAGE_SIZE
;
1346 BUG_ON(obj
->pages
!= NULL
);
1347 obj
->pages
= drm_malloc_ab(page_count
, sizeof(struct page
*));
1348 if (obj
->pages
== NULL
)
1351 inode
= obj
->base
.filp
->f_path
.dentry
->d_inode
;
1352 mapping
= inode
->i_mapping
;
1353 gfpmask
|= mapping_gfp_mask(mapping
);
1355 for (i
= 0; i
< page_count
; i
++) {
1356 page
= shmem_read_mapping_page_gfp(mapping
, i
, gfpmask
);
1360 obj
->pages
[i
] = page
;
1363 if (i915_gem_object_needs_bit17_swizzle(obj
))
1364 i915_gem_object_do_bit_17_swizzle(obj
);
1370 page_cache_release(obj
->pages
[i
]);
1372 drm_free_large(obj
->pages
);
1374 return PTR_ERR(page
);
1378 i915_gem_object_put_pages_gtt(struct drm_i915_gem_object
*obj
)
1380 int page_count
= obj
->base
.size
/ PAGE_SIZE
;
1386 BUG_ON(obj
->madv
== __I915_MADV_PURGED
);
1388 if (i915_gem_object_needs_bit17_swizzle(obj
))
1389 i915_gem_object_save_bit_17_swizzle(obj
);
1391 if (obj
->madv
== I915_MADV_DONTNEED
)
1394 for (i
= 0; i
< page_count
; i
++) {
1396 set_page_dirty(obj
->pages
[i
]);
1398 if (obj
->madv
== I915_MADV_WILLNEED
)
1399 mark_page_accessed(obj
->pages
[i
]);
1401 page_cache_release(obj
->pages
[i
]);
1405 drm_free_large(obj
->pages
);
1410 i915_gem_object_move_to_active(struct drm_i915_gem_object
*obj
,
1411 struct intel_ring_buffer
*ring
,
1414 struct drm_device
*dev
= obj
->base
.dev
;
1415 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1417 BUG_ON(ring
== NULL
);
1420 /* Add a reference if we're newly entering the active list. */
1422 drm_gem_object_reference(&obj
->base
);
1426 /* Move from whatever list we were on to the tail of execution. */
1427 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.active_list
);
1428 list_move_tail(&obj
->ring_list
, &ring
->active_list
);
1430 obj
->last_rendering_seqno
= seqno
;
1432 if (obj
->fenced_gpu_access
) {
1433 obj
->last_fenced_seqno
= seqno
;
1435 /* Bump MRU to take account of the delayed flush */
1436 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
1437 struct drm_i915_fence_reg
*reg
;
1439 reg
= &dev_priv
->fence_regs
[obj
->fence_reg
];
1440 list_move_tail(®
->lru_list
,
1441 &dev_priv
->mm
.fence_list
);
1447 i915_gem_object_move_off_active(struct drm_i915_gem_object
*obj
)
1449 list_del_init(&obj
->ring_list
);
1450 obj
->last_rendering_seqno
= 0;
1451 obj
->last_fenced_seqno
= 0;
1455 i915_gem_object_move_to_flushing(struct drm_i915_gem_object
*obj
)
1457 struct drm_device
*dev
= obj
->base
.dev
;
1458 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1460 BUG_ON(!obj
->active
);
1461 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.flushing_list
);
1463 i915_gem_object_move_off_active(obj
);
1467 i915_gem_object_move_to_inactive(struct drm_i915_gem_object
*obj
)
1469 struct drm_device
*dev
= obj
->base
.dev
;
1470 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1472 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
1474 BUG_ON(!list_empty(&obj
->gpu_write_list
));
1475 BUG_ON(!obj
->active
);
1478 i915_gem_object_move_off_active(obj
);
1479 obj
->fenced_gpu_access
= false;
1482 obj
->pending_gpu_write
= false;
1483 drm_gem_object_unreference(&obj
->base
);
1485 WARN_ON(i915_verify_lists(dev
));
1488 /* Immediately discard the backing storage */
1490 i915_gem_object_truncate(struct drm_i915_gem_object
*obj
)
1492 struct inode
*inode
;
1494 /* Our goal here is to return as much of the memory as
1495 * is possible back to the system as we are called from OOM.
1496 * To do this we must instruct the shmfs to drop all of its
1497 * backing pages, *now*.
1499 inode
= obj
->base
.filp
->f_path
.dentry
->d_inode
;
1500 shmem_truncate_range(inode
, 0, (loff_t
)-1);
1502 if (obj
->base
.map_list
.map
)
1503 drm_gem_free_mmap_offset(&obj
->base
);
1505 obj
->madv
= __I915_MADV_PURGED
;
1509 i915_gem_object_is_purgeable(struct drm_i915_gem_object
*obj
)
1511 return obj
->madv
== I915_MADV_DONTNEED
;
1515 i915_gem_process_flushing_list(struct intel_ring_buffer
*ring
,
1516 uint32_t flush_domains
)
1518 struct drm_i915_gem_object
*obj
, *next
;
1520 list_for_each_entry_safe(obj
, next
,
1521 &ring
->gpu_write_list
,
1523 if (obj
->base
.write_domain
& flush_domains
) {
1524 uint32_t old_write_domain
= obj
->base
.write_domain
;
1526 obj
->base
.write_domain
= 0;
1527 list_del_init(&obj
->gpu_write_list
);
1528 i915_gem_object_move_to_active(obj
, ring
,
1529 i915_gem_next_request_seqno(ring
));
1531 trace_i915_gem_object_change_domain(obj
,
1532 obj
->base
.read_domains
,
1539 i915_gem_get_seqno(struct drm_device
*dev
)
1541 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1542 u32 seqno
= dev_priv
->next_seqno
;
1544 /* reserve 0 for non-seqno */
1545 if (++dev_priv
->next_seqno
== 0)
1546 dev_priv
->next_seqno
= 1;
1552 i915_gem_next_request_seqno(struct intel_ring_buffer
*ring
)
1554 if (ring
->outstanding_lazy_request
== 0)
1555 ring
->outstanding_lazy_request
= i915_gem_get_seqno(ring
->dev
);
1557 return ring
->outstanding_lazy_request
;
1561 i915_add_request(struct intel_ring_buffer
*ring
,
1562 struct drm_file
*file
,
1563 struct drm_i915_gem_request
*request
)
1565 drm_i915_private_t
*dev_priv
= ring
->dev
->dev_private
;
1567 u32 request_ring_position
;
1572 * Emit any outstanding flushes - execbuf can fail to emit the flush
1573 * after having emitted the batchbuffer command. Hence we need to fix
1574 * things up similar to emitting the lazy request. The difference here
1575 * is that the flush _must_ happen before the next request, no matter
1578 if (ring
->gpu_caches_dirty
) {
1579 ret
= i915_gem_flush_ring(ring
, 0, I915_GEM_GPU_DOMAINS
);
1583 ring
->gpu_caches_dirty
= false;
1586 BUG_ON(request
== NULL
);
1587 seqno
= i915_gem_next_request_seqno(ring
);
1589 /* Record the position of the start of the request so that
1590 * should we detect the updated seqno part-way through the
1591 * GPU processing the request, we never over-estimate the
1592 * position of the head.
1594 request_ring_position
= intel_ring_get_tail(ring
);
1596 ret
= ring
->add_request(ring
, &seqno
);
1600 trace_i915_gem_request_add(ring
, seqno
);
1602 request
->seqno
= seqno
;
1603 request
->ring
= ring
;
1604 request
->tail
= request_ring_position
;
1605 request
->emitted_jiffies
= jiffies
;
1606 was_empty
= list_empty(&ring
->request_list
);
1607 list_add_tail(&request
->list
, &ring
->request_list
);
1610 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
1612 spin_lock(&file_priv
->mm
.lock
);
1613 request
->file_priv
= file_priv
;
1614 list_add_tail(&request
->client_list
,
1615 &file_priv
->mm
.request_list
);
1616 spin_unlock(&file_priv
->mm
.lock
);
1619 ring
->outstanding_lazy_request
= 0;
1621 if (!dev_priv
->mm
.suspended
) {
1622 if (i915_enable_hangcheck
) {
1623 mod_timer(&dev_priv
->hangcheck_timer
,
1625 msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD
));
1628 queue_delayed_work(dev_priv
->wq
,
1629 &dev_priv
->mm
.retire_work
, HZ
);
1632 WARN_ON(!list_empty(&ring
->gpu_write_list
));
1638 i915_gem_request_remove_from_client(struct drm_i915_gem_request
*request
)
1640 struct drm_i915_file_private
*file_priv
= request
->file_priv
;
1645 spin_lock(&file_priv
->mm
.lock
);
1646 if (request
->file_priv
) {
1647 list_del(&request
->client_list
);
1648 request
->file_priv
= NULL
;
1650 spin_unlock(&file_priv
->mm
.lock
);
1653 static void i915_gem_reset_ring_lists(struct drm_i915_private
*dev_priv
,
1654 struct intel_ring_buffer
*ring
)
1656 while (!list_empty(&ring
->request_list
)) {
1657 struct drm_i915_gem_request
*request
;
1659 request
= list_first_entry(&ring
->request_list
,
1660 struct drm_i915_gem_request
,
1663 list_del(&request
->list
);
1664 i915_gem_request_remove_from_client(request
);
1668 while (!list_empty(&ring
->active_list
)) {
1669 struct drm_i915_gem_object
*obj
;
1671 obj
= list_first_entry(&ring
->active_list
,
1672 struct drm_i915_gem_object
,
1675 obj
->base
.write_domain
= 0;
1676 list_del_init(&obj
->gpu_write_list
);
1677 i915_gem_object_move_to_inactive(obj
);
1681 static void i915_gem_reset_fences(struct drm_device
*dev
)
1683 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1686 for (i
= 0; i
< dev_priv
->num_fence_regs
; i
++) {
1687 struct drm_i915_fence_reg
*reg
= &dev_priv
->fence_regs
[i
];
1689 i915_gem_write_fence(dev
, i
, NULL
);
1692 i915_gem_object_fence_lost(reg
->obj
);
1696 INIT_LIST_HEAD(®
->lru_list
);
1699 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
1702 void i915_gem_reset(struct drm_device
*dev
)
1704 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1705 struct drm_i915_gem_object
*obj
;
1706 struct intel_ring_buffer
*ring
;
1709 for_each_ring(ring
, dev_priv
, i
)
1710 i915_gem_reset_ring_lists(dev_priv
, ring
);
1712 /* Remove anything from the flushing lists. The GPU cache is likely
1713 * to be lost on reset along with the data, so simply move the
1714 * lost bo to the inactive list.
1716 while (!list_empty(&dev_priv
->mm
.flushing_list
)) {
1717 obj
= list_first_entry(&dev_priv
->mm
.flushing_list
,
1718 struct drm_i915_gem_object
,
1721 obj
->base
.write_domain
= 0;
1722 list_del_init(&obj
->gpu_write_list
);
1723 i915_gem_object_move_to_inactive(obj
);
1726 /* Move everything out of the GPU domains to ensure we do any
1727 * necessary invalidation upon reuse.
1729 list_for_each_entry(obj
,
1730 &dev_priv
->mm
.inactive_list
,
1733 obj
->base
.read_domains
&= ~I915_GEM_GPU_DOMAINS
;
1736 /* The fence registers are invalidated so clear them out */
1737 i915_gem_reset_fences(dev
);
1741 * This function clears the request list as sequence numbers are passed.
1744 i915_gem_retire_requests_ring(struct intel_ring_buffer
*ring
)
1749 if (list_empty(&ring
->request_list
))
1752 WARN_ON(i915_verify_lists(ring
->dev
));
1754 seqno
= ring
->get_seqno(ring
);
1756 for (i
= 0; i
< ARRAY_SIZE(ring
->sync_seqno
); i
++)
1757 if (seqno
>= ring
->sync_seqno
[i
])
1758 ring
->sync_seqno
[i
] = 0;
1760 while (!list_empty(&ring
->request_list
)) {
1761 struct drm_i915_gem_request
*request
;
1763 request
= list_first_entry(&ring
->request_list
,
1764 struct drm_i915_gem_request
,
1767 if (!i915_seqno_passed(seqno
, request
->seqno
))
1770 trace_i915_gem_request_retire(ring
, request
->seqno
);
1771 /* We know the GPU must have read the request to have
1772 * sent us the seqno + interrupt, so use the position
1773 * of tail of the request to update the last known position
1776 ring
->last_retired_head
= request
->tail
;
1778 list_del(&request
->list
);
1779 i915_gem_request_remove_from_client(request
);
1783 /* Move any buffers on the active list that are no longer referenced
1784 * by the ringbuffer to the flushing/inactive lists as appropriate.
1786 while (!list_empty(&ring
->active_list
)) {
1787 struct drm_i915_gem_object
*obj
;
1789 obj
= list_first_entry(&ring
->active_list
,
1790 struct drm_i915_gem_object
,
1793 if (!i915_seqno_passed(seqno
, obj
->last_rendering_seqno
))
1796 if (obj
->base
.write_domain
!= 0)
1797 i915_gem_object_move_to_flushing(obj
);
1799 i915_gem_object_move_to_inactive(obj
);
1802 if (unlikely(ring
->trace_irq_seqno
&&
1803 i915_seqno_passed(seqno
, ring
->trace_irq_seqno
))) {
1804 ring
->irq_put(ring
);
1805 ring
->trace_irq_seqno
= 0;
1808 WARN_ON(i915_verify_lists(ring
->dev
));
1812 i915_gem_retire_requests(struct drm_device
*dev
)
1814 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1815 struct intel_ring_buffer
*ring
;
1818 for_each_ring(ring
, dev_priv
, i
)
1819 i915_gem_retire_requests_ring(ring
);
1823 i915_gem_retire_work_handler(struct work_struct
*work
)
1825 drm_i915_private_t
*dev_priv
;
1826 struct drm_device
*dev
;
1827 struct intel_ring_buffer
*ring
;
1831 dev_priv
= container_of(work
, drm_i915_private_t
,
1832 mm
.retire_work
.work
);
1833 dev
= dev_priv
->dev
;
1835 /* Come back later if the device is busy... */
1836 if (!mutex_trylock(&dev
->struct_mutex
)) {
1837 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, HZ
);
1841 i915_gem_retire_requests(dev
);
1843 /* Send a periodic flush down the ring so we don't hold onto GEM
1844 * objects indefinitely.
1847 for_each_ring(ring
, dev_priv
, i
) {
1848 if (ring
->gpu_caches_dirty
) {
1849 struct drm_i915_gem_request
*request
;
1851 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1852 if (request
== NULL
||
1853 i915_add_request(ring
, NULL
, request
))
1857 idle
&= list_empty(&ring
->request_list
);
1860 if (!dev_priv
->mm
.suspended
&& !idle
)
1861 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, HZ
);
1863 mutex_unlock(&dev
->struct_mutex
);
1867 i915_gem_check_wedge(struct drm_i915_private
*dev_priv
,
1870 if (atomic_read(&dev_priv
->mm
.wedged
)) {
1871 struct completion
*x
= &dev_priv
->error_completion
;
1872 bool recovery_complete
;
1873 unsigned long flags
;
1875 /* Give the error handler a chance to run. */
1876 spin_lock_irqsave(&x
->wait
.lock
, flags
);
1877 recovery_complete
= x
->done
> 0;
1878 spin_unlock_irqrestore(&x
->wait
.lock
, flags
);
1880 /* Non-interruptible callers can't handle -EAGAIN, hence return
1881 * -EIO unconditionally for these. */
1885 /* Recovery complete, but still wedged means reset failure. */
1886 if (recovery_complete
)
1896 * Compare seqno against outstanding lazy request. Emit a request if they are
1900 i915_gem_check_olr(struct intel_ring_buffer
*ring
, u32 seqno
)
1904 BUG_ON(!mutex_is_locked(&ring
->dev
->struct_mutex
));
1906 if (seqno
== ring
->outstanding_lazy_request
) {
1907 struct drm_i915_gem_request
*request
;
1909 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1910 if (request
== NULL
)
1913 ret
= i915_add_request(ring
, NULL
, request
);
1919 BUG_ON(seqno
!= request
->seqno
);
1926 * __wait_seqno - wait until execution of seqno has finished
1927 * @ring: the ring expected to report seqno
1929 * @interruptible: do an interruptible wait (normally yes)
1930 * @timeout: in - how long to wait (NULL forever); out - how much time remaining
1932 * Returns 0 if the seqno was found within the alloted time. Else returns the
1933 * errno with remaining time filled in timeout argument.
1935 static int __wait_seqno(struct intel_ring_buffer
*ring
, u32 seqno
,
1936 bool interruptible
, struct timespec
*timeout
)
1938 drm_i915_private_t
*dev_priv
= ring
->dev
->dev_private
;
1939 struct timespec before
, now
, wait_time
={1,0};
1940 unsigned long timeout_jiffies
;
1942 bool wait_forever
= true;
1945 if (i915_seqno_passed(ring
->get_seqno(ring
), seqno
))
1948 trace_i915_gem_request_wait_begin(ring
, seqno
);
1950 if (timeout
!= NULL
) {
1951 wait_time
= *timeout
;
1952 wait_forever
= false;
1955 timeout_jiffies
= timespec_to_jiffies(&wait_time
);
1957 if (WARN_ON(!ring
->irq_get(ring
)))
1960 /* Record current time in case interrupted by signal, or wedged * */
1961 getrawmonotonic(&before
);
1964 (i915_seqno_passed(ring->get_seqno(ring), seqno) || \
1965 atomic_read(&dev_priv->mm.wedged))
1968 end
= wait_event_interruptible_timeout(ring
->irq_queue
,
1972 end
= wait_event_timeout(ring
->irq_queue
, EXIT_COND
,
1975 ret
= i915_gem_check_wedge(dev_priv
, interruptible
);
1978 } while (end
== 0 && wait_forever
);
1980 getrawmonotonic(&now
);
1982 ring
->irq_put(ring
);
1983 trace_i915_gem_request_wait_end(ring
, seqno
);
1987 struct timespec sleep_time
= timespec_sub(now
, before
);
1988 *timeout
= timespec_sub(*timeout
, sleep_time
);
1992 case -EAGAIN
: /* Wedged */
1993 case -ERESTARTSYS
: /* Signal */
1995 case 0: /* Timeout */
1997 set_normalized_timespec(timeout
, 0, 0);
1999 default: /* Completed */
2000 WARN_ON(end
< 0); /* We're not aware of other errors */
2006 * Waits for a sequence number to be signaled, and cleans up the
2007 * request and object lists appropriately for that event.
2010 i915_wait_seqno(struct intel_ring_buffer
*ring
, uint32_t seqno
)
2012 drm_i915_private_t
*dev_priv
= ring
->dev
->dev_private
;
2017 ret
= i915_gem_check_wedge(dev_priv
, dev_priv
->mm
.interruptible
);
2021 ret
= i915_gem_check_olr(ring
, seqno
);
2025 ret
= __wait_seqno(ring
, seqno
, dev_priv
->mm
.interruptible
, NULL
);
2031 * Ensures that all rendering to the object has completed and the object is
2032 * safe to unbind from the GTT or access from the CPU.
2035 i915_gem_object_wait_rendering(struct drm_i915_gem_object
*obj
)
2039 /* This function only exists to support waiting for existing rendering,
2040 * not for emitting required flushes.
2042 BUG_ON((obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
) != 0);
2044 /* If there is rendering queued on the buffer being evicted, wait for
2048 ret
= i915_wait_seqno(obj
->ring
, obj
->last_rendering_seqno
);
2051 i915_gem_retire_requests_ring(obj
->ring
);
2058 * Ensures that an object will eventually get non-busy by flushing any required
2059 * write domains, emitting any outstanding lazy request and retiring and
2060 * completed requests.
2063 i915_gem_object_flush_active(struct drm_i915_gem_object
*obj
)
2068 ret
= i915_gem_object_flush_gpu_write_domain(obj
);
2072 ret
= i915_gem_check_olr(obj
->ring
,
2073 obj
->last_rendering_seqno
);
2076 i915_gem_retire_requests_ring(obj
->ring
);
2083 * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT
2084 * @DRM_IOCTL_ARGS: standard ioctl arguments
2086 * Returns 0 if successful, else an error is returned with the remaining time in
2087 * the timeout parameter.
2088 * -ETIME: object is still busy after timeout
2089 * -ERESTARTSYS: signal interrupted the wait
2090 * -ENONENT: object doesn't exist
2091 * Also possible, but rare:
2092 * -EAGAIN: GPU wedged
2094 * -ENODEV: Internal IRQ fail
2095 * -E?: The add request failed
2097 * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any
2098 * non-zero timeout parameter the wait ioctl will wait for the given number of
2099 * nanoseconds on an object becoming unbusy. Since the wait itself does so
2100 * without holding struct_mutex the object may become re-busied before this
2101 * function completes. A similar but shorter * race condition exists in the busy
2105 i915_gem_wait_ioctl(struct drm_device
*dev
, void *data
, struct drm_file
*file
)
2107 struct drm_i915_gem_wait
*args
= data
;
2108 struct drm_i915_gem_object
*obj
;
2109 struct intel_ring_buffer
*ring
= NULL
;
2110 struct timespec timeout_stack
, *timeout
= NULL
;
2114 if (args
->timeout_ns
>= 0) {
2115 timeout_stack
= ns_to_timespec(args
->timeout_ns
);
2116 timeout
= &timeout_stack
;
2119 ret
= i915_mutex_lock_interruptible(dev
);
2123 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->bo_handle
));
2124 if (&obj
->base
== NULL
) {
2125 mutex_unlock(&dev
->struct_mutex
);
2129 /* Need to make sure the object gets inactive eventually. */
2130 ret
= i915_gem_object_flush_active(obj
);
2135 seqno
= obj
->last_rendering_seqno
;
2142 /* Do this after OLR check to make sure we make forward progress polling
2143 * on this IOCTL with a 0 timeout (like busy ioctl)
2145 if (!args
->timeout_ns
) {
2150 drm_gem_object_unreference(&obj
->base
);
2151 mutex_unlock(&dev
->struct_mutex
);
2153 ret
= __wait_seqno(ring
, seqno
, true, timeout
);
2155 WARN_ON(!timespec_valid(timeout
));
2156 args
->timeout_ns
= timespec_to_ns(timeout
);
2161 drm_gem_object_unreference(&obj
->base
);
2162 mutex_unlock(&dev
->struct_mutex
);
2167 * i915_gem_object_sync - sync an object to a ring.
2169 * @obj: object which may be in use on another ring.
2170 * @to: ring we wish to use the object on. May be NULL.
2172 * This code is meant to abstract object synchronization with the GPU.
2173 * Calling with NULL implies synchronizing the object with the CPU
2174 * rather than a particular GPU ring.
2176 * Returns 0 if successful, else propagates up the lower layer error.
2179 i915_gem_object_sync(struct drm_i915_gem_object
*obj
,
2180 struct intel_ring_buffer
*to
)
2182 struct intel_ring_buffer
*from
= obj
->ring
;
2186 if (from
== NULL
|| to
== from
)
2189 if (to
== NULL
|| !i915_semaphore_is_enabled(obj
->base
.dev
))
2190 return i915_gem_object_wait_rendering(obj
);
2192 idx
= intel_ring_sync_index(from
, to
);
2194 seqno
= obj
->last_rendering_seqno
;
2195 if (seqno
<= from
->sync_seqno
[idx
])
2198 ret
= i915_gem_check_olr(obj
->ring
, seqno
);
2202 ret
= to
->sync_to(to
, from
, seqno
);
2204 from
->sync_seqno
[idx
] = seqno
;
2209 static void i915_gem_object_finish_gtt(struct drm_i915_gem_object
*obj
)
2211 u32 old_write_domain
, old_read_domains
;
2213 /* Act a barrier for all accesses through the GTT */
2216 /* Force a pagefault for domain tracking on next user access */
2217 i915_gem_release_mmap(obj
);
2219 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
) == 0)
2222 old_read_domains
= obj
->base
.read_domains
;
2223 old_write_domain
= obj
->base
.write_domain
;
2225 obj
->base
.read_domains
&= ~I915_GEM_DOMAIN_GTT
;
2226 obj
->base
.write_domain
&= ~I915_GEM_DOMAIN_GTT
;
2228 trace_i915_gem_object_change_domain(obj
,
2234 * Unbinds an object from the GTT aperture.
2237 i915_gem_object_unbind(struct drm_i915_gem_object
*obj
)
2239 drm_i915_private_t
*dev_priv
= obj
->base
.dev
->dev_private
;
2242 if (obj
->gtt_space
== NULL
)
2248 ret
= i915_gem_object_finish_gpu(obj
);
2251 /* Continue on if we fail due to EIO, the GPU is hung so we
2252 * should be safe and we need to cleanup or else we might
2253 * cause memory corruption through use-after-free.
2256 i915_gem_object_finish_gtt(obj
);
2258 /* Move the object to the CPU domain to ensure that
2259 * any possible CPU writes while it's not in the GTT
2260 * are flushed when we go to remap it.
2263 ret
= i915_gem_object_set_to_cpu_domain(obj
, 1);
2264 if (ret
== -ERESTARTSYS
)
2267 /* In the event of a disaster, abandon all caches and
2268 * hope for the best.
2270 i915_gem_clflush_object(obj
);
2271 obj
->base
.read_domains
= obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
2274 /* release the fence reg _after_ flushing */
2275 ret
= i915_gem_object_put_fence(obj
);
2279 trace_i915_gem_object_unbind(obj
);
2281 if (obj
->has_global_gtt_mapping
)
2282 i915_gem_gtt_unbind_object(obj
);
2283 if (obj
->has_aliasing_ppgtt_mapping
) {
2284 i915_ppgtt_unbind_object(dev_priv
->mm
.aliasing_ppgtt
, obj
);
2285 obj
->has_aliasing_ppgtt_mapping
= 0;
2287 i915_gem_gtt_finish_object(obj
);
2289 i915_gem_object_put_pages_gtt(obj
);
2291 list_del_init(&obj
->gtt_list
);
2292 list_del_init(&obj
->mm_list
);
2293 /* Avoid an unnecessary call to unbind on rebind. */
2294 obj
->map_and_fenceable
= true;
2296 drm_mm_put_block(obj
->gtt_space
);
2297 obj
->gtt_space
= NULL
;
2298 obj
->gtt_offset
= 0;
2300 if (i915_gem_object_is_purgeable(obj
))
2301 i915_gem_object_truncate(obj
);
2307 i915_gem_flush_ring(struct intel_ring_buffer
*ring
,
2308 uint32_t invalidate_domains
,
2309 uint32_t flush_domains
)
2313 if (((invalidate_domains
| flush_domains
) & I915_GEM_GPU_DOMAINS
) == 0)
2316 trace_i915_gem_ring_flush(ring
, invalidate_domains
, flush_domains
);
2318 ret
= ring
->flush(ring
, invalidate_domains
, flush_domains
);
2322 if (flush_domains
& I915_GEM_GPU_DOMAINS
)
2323 i915_gem_process_flushing_list(ring
, flush_domains
);
2328 static int i915_ring_idle(struct intel_ring_buffer
*ring
)
2332 if (list_empty(&ring
->gpu_write_list
) && list_empty(&ring
->active_list
))
2335 if (!list_empty(&ring
->gpu_write_list
)) {
2336 ret
= i915_gem_flush_ring(ring
,
2337 I915_GEM_GPU_DOMAINS
, I915_GEM_GPU_DOMAINS
);
2342 return i915_wait_seqno(ring
, i915_gem_next_request_seqno(ring
));
2345 int i915_gpu_idle(struct drm_device
*dev
)
2347 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2348 struct intel_ring_buffer
*ring
;
2351 /* Flush everything onto the inactive list. */
2352 for_each_ring(ring
, dev_priv
, i
) {
2353 ret
= i915_ring_idle(ring
);
2357 /* Is the device fubar? */
2358 if (WARN_ON(!list_empty(&ring
->gpu_write_list
)))
2361 ret
= i915_switch_context(ring
, NULL
, DEFAULT_CONTEXT_ID
);
2369 static void sandybridge_write_fence_reg(struct drm_device
*dev
, int reg
,
2370 struct drm_i915_gem_object
*obj
)
2372 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2376 u32 size
= obj
->gtt_space
->size
;
2378 val
= (uint64_t)((obj
->gtt_offset
+ size
- 4096) &
2380 val
|= obj
->gtt_offset
& 0xfffff000;
2381 val
|= (uint64_t)((obj
->stride
/ 128) - 1) <<
2382 SANDYBRIDGE_FENCE_PITCH_SHIFT
;
2384 if (obj
->tiling_mode
== I915_TILING_Y
)
2385 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2386 val
|= I965_FENCE_REG_VALID
;
2390 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0
+ reg
* 8, val
);
2391 POSTING_READ(FENCE_REG_SANDYBRIDGE_0
+ reg
* 8);
2394 static void i965_write_fence_reg(struct drm_device
*dev
, int reg
,
2395 struct drm_i915_gem_object
*obj
)
2397 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2401 u32 size
= obj
->gtt_space
->size
;
2403 val
= (uint64_t)((obj
->gtt_offset
+ size
- 4096) &
2405 val
|= obj
->gtt_offset
& 0xfffff000;
2406 val
|= ((obj
->stride
/ 128) - 1) << I965_FENCE_PITCH_SHIFT
;
2407 if (obj
->tiling_mode
== I915_TILING_Y
)
2408 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2409 val
|= I965_FENCE_REG_VALID
;
2413 I915_WRITE64(FENCE_REG_965_0
+ reg
* 8, val
);
2414 POSTING_READ(FENCE_REG_965_0
+ reg
* 8);
2417 static void i915_write_fence_reg(struct drm_device
*dev
, int reg
,
2418 struct drm_i915_gem_object
*obj
)
2420 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2424 u32 size
= obj
->gtt_space
->size
;
2428 WARN((obj
->gtt_offset
& ~I915_FENCE_START_MASK
) ||
2429 (size
& -size
) != size
||
2430 (obj
->gtt_offset
& (size
- 1)),
2431 "object 0x%08x [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
2432 obj
->gtt_offset
, obj
->map_and_fenceable
, size
);
2434 if (obj
->tiling_mode
== I915_TILING_Y
&& HAS_128_BYTE_Y_TILING(dev
))
2439 /* Note: pitch better be a power of two tile widths */
2440 pitch_val
= obj
->stride
/ tile_width
;
2441 pitch_val
= ffs(pitch_val
) - 1;
2443 val
= obj
->gtt_offset
;
2444 if (obj
->tiling_mode
== I915_TILING_Y
)
2445 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2446 val
|= I915_FENCE_SIZE_BITS(size
);
2447 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2448 val
|= I830_FENCE_REG_VALID
;
2453 reg
= FENCE_REG_830_0
+ reg
* 4;
2455 reg
= FENCE_REG_945_8
+ (reg
- 8) * 4;
2457 I915_WRITE(reg
, val
);
2461 static void i830_write_fence_reg(struct drm_device
*dev
, int reg
,
2462 struct drm_i915_gem_object
*obj
)
2464 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2468 u32 size
= obj
->gtt_space
->size
;
2471 WARN((obj
->gtt_offset
& ~I830_FENCE_START_MASK
) ||
2472 (size
& -size
) != size
||
2473 (obj
->gtt_offset
& (size
- 1)),
2474 "object 0x%08x not 512K or pot-size 0x%08x aligned\n",
2475 obj
->gtt_offset
, size
);
2477 pitch_val
= obj
->stride
/ 128;
2478 pitch_val
= ffs(pitch_val
) - 1;
2480 val
= obj
->gtt_offset
;
2481 if (obj
->tiling_mode
== I915_TILING_Y
)
2482 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2483 val
|= I830_FENCE_SIZE_BITS(size
);
2484 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2485 val
|= I830_FENCE_REG_VALID
;
2489 I915_WRITE(FENCE_REG_830_0
+ reg
* 4, val
);
2490 POSTING_READ(FENCE_REG_830_0
+ reg
* 4);
2493 static void i915_gem_write_fence(struct drm_device
*dev
, int reg
,
2494 struct drm_i915_gem_object
*obj
)
2496 switch (INTEL_INFO(dev
)->gen
) {
2498 case 6: sandybridge_write_fence_reg(dev
, reg
, obj
); break;
2500 case 4: i965_write_fence_reg(dev
, reg
, obj
); break;
2501 case 3: i915_write_fence_reg(dev
, reg
, obj
); break;
2502 case 2: i830_write_fence_reg(dev
, reg
, obj
); break;
2507 static inline int fence_number(struct drm_i915_private
*dev_priv
,
2508 struct drm_i915_fence_reg
*fence
)
2510 return fence
- dev_priv
->fence_regs
;
2513 static void i915_gem_object_update_fence(struct drm_i915_gem_object
*obj
,
2514 struct drm_i915_fence_reg
*fence
,
2517 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2518 int reg
= fence_number(dev_priv
, fence
);
2520 i915_gem_write_fence(obj
->base
.dev
, reg
, enable
? obj
: NULL
);
2523 obj
->fence_reg
= reg
;
2525 list_move_tail(&fence
->lru_list
, &dev_priv
->mm
.fence_list
);
2527 obj
->fence_reg
= I915_FENCE_REG_NONE
;
2529 list_del_init(&fence
->lru_list
);
2534 i915_gem_object_flush_fence(struct drm_i915_gem_object
*obj
)
2538 if (obj
->fenced_gpu_access
) {
2539 if (obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
) {
2540 ret
= i915_gem_flush_ring(obj
->ring
,
2541 0, obj
->base
.write_domain
);
2546 obj
->fenced_gpu_access
= false;
2549 if (obj
->last_fenced_seqno
) {
2550 ret
= i915_wait_seqno(obj
->ring
, obj
->last_fenced_seqno
);
2554 obj
->last_fenced_seqno
= 0;
2557 /* Ensure that all CPU reads are completed before installing a fence
2558 * and all writes before removing the fence.
2560 if (obj
->base
.read_domains
& I915_GEM_DOMAIN_GTT
)
2567 i915_gem_object_put_fence(struct drm_i915_gem_object
*obj
)
2569 struct drm_i915_private
*dev_priv
= obj
->base
.dev
->dev_private
;
2572 ret
= i915_gem_object_flush_fence(obj
);
2576 if (obj
->fence_reg
== I915_FENCE_REG_NONE
)
2579 i915_gem_object_update_fence(obj
,
2580 &dev_priv
->fence_regs
[obj
->fence_reg
],
2582 i915_gem_object_fence_lost(obj
);
2587 static struct drm_i915_fence_reg
*
2588 i915_find_fence_reg(struct drm_device
*dev
)
2590 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2591 struct drm_i915_fence_reg
*reg
, *avail
;
2594 /* First try to find a free reg */
2596 for (i
= dev_priv
->fence_reg_start
; i
< dev_priv
->num_fence_regs
; i
++) {
2597 reg
= &dev_priv
->fence_regs
[i
];
2601 if (!reg
->pin_count
)
2608 /* None available, try to steal one or wait for a user to finish */
2609 list_for_each_entry(reg
, &dev_priv
->mm
.fence_list
, lru_list
) {
2620 * i915_gem_object_get_fence - set up fencing for an object
2621 * @obj: object to map through a fence reg
2623 * When mapping objects through the GTT, userspace wants to be able to write
2624 * to them without having to worry about swizzling if the object is tiled.
2625 * This function walks the fence regs looking for a free one for @obj,
2626 * stealing one if it can't find any.
2628 * It then sets up the reg based on the object's properties: address, pitch
2629 * and tiling format.
2631 * For an untiled surface, this removes any existing fence.
2634 i915_gem_object_get_fence(struct drm_i915_gem_object
*obj
)
2636 struct drm_device
*dev
= obj
->base
.dev
;
2637 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2638 bool enable
= obj
->tiling_mode
!= I915_TILING_NONE
;
2639 struct drm_i915_fence_reg
*reg
;
2642 /* Have we updated the tiling parameters upon the object and so
2643 * will need to serialise the write to the associated fence register?
2645 if (obj
->fence_dirty
) {
2646 ret
= i915_gem_object_flush_fence(obj
);
2651 /* Just update our place in the LRU if our fence is getting reused. */
2652 if (obj
->fence_reg
!= I915_FENCE_REG_NONE
) {
2653 reg
= &dev_priv
->fence_regs
[obj
->fence_reg
];
2654 if (!obj
->fence_dirty
) {
2655 list_move_tail(®
->lru_list
,
2656 &dev_priv
->mm
.fence_list
);
2659 } else if (enable
) {
2660 reg
= i915_find_fence_reg(dev
);
2665 struct drm_i915_gem_object
*old
= reg
->obj
;
2667 ret
= i915_gem_object_flush_fence(old
);
2671 i915_gem_object_fence_lost(old
);
2676 i915_gem_object_update_fence(obj
, reg
, enable
);
2677 obj
->fence_dirty
= false;
2683 * Finds free space in the GTT aperture and binds the object there.
2686 i915_gem_object_bind_to_gtt(struct drm_i915_gem_object
*obj
,
2688 bool map_and_fenceable
)
2690 struct drm_device
*dev
= obj
->base
.dev
;
2691 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2692 struct drm_mm_node
*free_space
;
2693 gfp_t gfpmask
= __GFP_NORETRY
| __GFP_NOWARN
;
2694 u32 size
, fence_size
, fence_alignment
, unfenced_alignment
;
2695 bool mappable
, fenceable
;
2698 if (obj
->madv
!= I915_MADV_WILLNEED
) {
2699 DRM_ERROR("Attempting to bind a purgeable object\n");
2703 fence_size
= i915_gem_get_gtt_size(dev
,
2706 fence_alignment
= i915_gem_get_gtt_alignment(dev
,
2709 unfenced_alignment
=
2710 i915_gem_get_unfenced_gtt_alignment(dev
,
2715 alignment
= map_and_fenceable
? fence_alignment
:
2717 if (map_and_fenceable
&& alignment
& (fence_alignment
- 1)) {
2718 DRM_ERROR("Invalid object alignment requested %u\n", alignment
);
2722 size
= map_and_fenceable
? fence_size
: obj
->base
.size
;
2724 /* If the object is bigger than the entire aperture, reject it early
2725 * before evicting everything in a vain attempt to find space.
2727 if (obj
->base
.size
>
2728 (map_and_fenceable
? dev_priv
->mm
.gtt_mappable_end
: dev_priv
->mm
.gtt_total
)) {
2729 DRM_ERROR("Attempting to bind an object larger than the aperture\n");
2734 if (map_and_fenceable
)
2736 drm_mm_search_free_in_range(&dev_priv
->mm
.gtt_space
,
2738 dev_priv
->mm
.gtt_mappable_end
,
2741 free_space
= drm_mm_search_free(&dev_priv
->mm
.gtt_space
,
2742 size
, alignment
, 0);
2744 if (free_space
!= NULL
) {
2745 if (map_and_fenceable
)
2747 drm_mm_get_block_range_generic(free_space
,
2749 dev_priv
->mm
.gtt_mappable_end
,
2753 drm_mm_get_block(free_space
, size
, alignment
);
2755 if (obj
->gtt_space
== NULL
) {
2756 /* If the gtt is empty and we're still having trouble
2757 * fitting our object in, we're out of memory.
2759 ret
= i915_gem_evict_something(dev
, size
, alignment
,
2767 ret
= i915_gem_object_get_pages_gtt(obj
, gfpmask
);
2769 drm_mm_put_block(obj
->gtt_space
);
2770 obj
->gtt_space
= NULL
;
2772 if (ret
== -ENOMEM
) {
2773 /* first try to reclaim some memory by clearing the GTT */
2774 ret
= i915_gem_evict_everything(dev
, false);
2776 /* now try to shrink everyone else */
2791 ret
= i915_gem_gtt_prepare_object(obj
);
2793 i915_gem_object_put_pages_gtt(obj
);
2794 drm_mm_put_block(obj
->gtt_space
);
2795 obj
->gtt_space
= NULL
;
2797 if (i915_gem_evict_everything(dev
, false))
2803 if (!dev_priv
->mm
.aliasing_ppgtt
)
2804 i915_gem_gtt_bind_object(obj
, obj
->cache_level
);
2806 list_add_tail(&obj
->gtt_list
, &dev_priv
->mm
.gtt_list
);
2807 list_add_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
2809 /* Assert that the object is not currently in any GPU domain. As it
2810 * wasn't in the GTT, there shouldn't be any way it could have been in
2813 BUG_ON(obj
->base
.read_domains
& I915_GEM_GPU_DOMAINS
);
2814 BUG_ON(obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
);
2816 obj
->gtt_offset
= obj
->gtt_space
->start
;
2819 obj
->gtt_space
->size
== fence_size
&&
2820 (obj
->gtt_space
->start
& (fence_alignment
- 1)) == 0;
2823 obj
->gtt_offset
+ obj
->base
.size
<= dev_priv
->mm
.gtt_mappable_end
;
2825 obj
->map_and_fenceable
= mappable
&& fenceable
;
2827 trace_i915_gem_object_bind(obj
, map_and_fenceable
);
2832 i915_gem_clflush_object(struct drm_i915_gem_object
*obj
)
2834 /* If we don't have a page list set up, then we're not pinned
2835 * to GPU, and we can ignore the cache flush because it'll happen
2836 * again at bind time.
2838 if (obj
->pages
== NULL
)
2841 /* If the GPU is snooping the contents of the CPU cache,
2842 * we do not need to manually clear the CPU cache lines. However,
2843 * the caches are only snooped when the render cache is
2844 * flushed/invalidated. As we always have to emit invalidations
2845 * and flushes when moving into and out of the RENDER domain, correct
2846 * snooping behaviour occurs naturally as the result of our domain
2849 if (obj
->cache_level
!= I915_CACHE_NONE
)
2852 trace_i915_gem_object_clflush(obj
);
2854 drm_clflush_pages(obj
->pages
, obj
->base
.size
/ PAGE_SIZE
);
2857 /** Flushes any GPU write domain for the object if it's dirty. */
2859 i915_gem_object_flush_gpu_write_domain(struct drm_i915_gem_object
*obj
)
2861 if ((obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
) == 0)
2864 /* Queue the GPU write cache flushing we need. */
2865 return i915_gem_flush_ring(obj
->ring
, 0, obj
->base
.write_domain
);
2868 /** Flushes the GTT write domain for the object if it's dirty. */
2870 i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object
*obj
)
2872 uint32_t old_write_domain
;
2874 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_GTT
)
2877 /* No actual flushing is required for the GTT write domain. Writes
2878 * to it immediately go to main memory as far as we know, so there's
2879 * no chipset flush. It also doesn't land in render cache.
2881 * However, we do have to enforce the order so that all writes through
2882 * the GTT land before any writes to the device, such as updates to
2887 old_write_domain
= obj
->base
.write_domain
;
2888 obj
->base
.write_domain
= 0;
2890 trace_i915_gem_object_change_domain(obj
,
2891 obj
->base
.read_domains
,
2895 /** Flushes the CPU write domain for the object if it's dirty. */
2897 i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object
*obj
)
2899 uint32_t old_write_domain
;
2901 if (obj
->base
.write_domain
!= I915_GEM_DOMAIN_CPU
)
2904 i915_gem_clflush_object(obj
);
2905 intel_gtt_chipset_flush();
2906 old_write_domain
= obj
->base
.write_domain
;
2907 obj
->base
.write_domain
= 0;
2909 trace_i915_gem_object_change_domain(obj
,
2910 obj
->base
.read_domains
,
2915 * Moves a single object to the GTT read, and possibly write domain.
2917 * This function returns when the move is complete, including waiting on
2921 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object
*obj
, bool write
)
2923 drm_i915_private_t
*dev_priv
= obj
->base
.dev
->dev_private
;
2924 uint32_t old_write_domain
, old_read_domains
;
2927 /* Not valid to be called on unbound objects. */
2928 if (obj
->gtt_space
== NULL
)
2931 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_GTT
)
2934 ret
= i915_gem_object_flush_gpu_write_domain(obj
);
2938 if (obj
->pending_gpu_write
|| write
) {
2939 ret
= i915_gem_object_wait_rendering(obj
);
2944 i915_gem_object_flush_cpu_write_domain(obj
);
2946 old_write_domain
= obj
->base
.write_domain
;
2947 old_read_domains
= obj
->base
.read_domains
;
2949 /* It should now be out of any other write domains, and we can update
2950 * the domain values for our changes.
2952 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_GTT
) != 0);
2953 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
2955 obj
->base
.read_domains
= I915_GEM_DOMAIN_GTT
;
2956 obj
->base
.write_domain
= I915_GEM_DOMAIN_GTT
;
2960 trace_i915_gem_object_change_domain(obj
,
2964 /* And bump the LRU for this access */
2965 if (i915_gem_object_is_inactive(obj
))
2966 list_move_tail(&obj
->mm_list
, &dev_priv
->mm
.inactive_list
);
2971 int i915_gem_object_set_cache_level(struct drm_i915_gem_object
*obj
,
2972 enum i915_cache_level cache_level
)
2974 struct drm_device
*dev
= obj
->base
.dev
;
2975 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2978 if (obj
->cache_level
== cache_level
)
2981 if (obj
->pin_count
) {
2982 DRM_DEBUG("can not change the cache level of pinned objects\n");
2986 if (obj
->gtt_space
) {
2987 ret
= i915_gem_object_finish_gpu(obj
);
2991 i915_gem_object_finish_gtt(obj
);
2993 /* Before SandyBridge, you could not use tiling or fence
2994 * registers with snooped memory, so relinquish any fences
2995 * currently pointing to our region in the aperture.
2997 if (INTEL_INFO(obj
->base
.dev
)->gen
< 6) {
2998 ret
= i915_gem_object_put_fence(obj
);
3003 if (obj
->has_global_gtt_mapping
)
3004 i915_gem_gtt_bind_object(obj
, cache_level
);
3005 if (obj
->has_aliasing_ppgtt_mapping
)
3006 i915_ppgtt_bind_object(dev_priv
->mm
.aliasing_ppgtt
,
3010 if (cache_level
== I915_CACHE_NONE
) {
3011 u32 old_read_domains
, old_write_domain
;
3013 /* If we're coming from LLC cached, then we haven't
3014 * actually been tracking whether the data is in the
3015 * CPU cache or not, since we only allow one bit set
3016 * in obj->write_domain and have been skipping the clflushes.
3017 * Just set it to the CPU cache for now.
3019 WARN_ON(obj
->base
.write_domain
& ~I915_GEM_DOMAIN_CPU
);
3020 WARN_ON(obj
->base
.read_domains
& ~I915_GEM_DOMAIN_CPU
);
3022 old_read_domains
= obj
->base
.read_domains
;
3023 old_write_domain
= obj
->base
.write_domain
;
3025 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3026 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3028 trace_i915_gem_object_change_domain(obj
,
3033 obj
->cache_level
= cache_level
;
3038 * Prepare buffer for display plane (scanout, cursors, etc).
3039 * Can be called from an uninterruptible phase (modesetting) and allows
3040 * any flushes to be pipelined (for pageflips).
3043 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object
*obj
,
3045 struct intel_ring_buffer
*pipelined
)
3047 u32 old_read_domains
, old_write_domain
;
3050 ret
= i915_gem_object_flush_gpu_write_domain(obj
);
3054 if (pipelined
!= obj
->ring
) {
3055 ret
= i915_gem_object_sync(obj
, pipelined
);
3060 /* The display engine is not coherent with the LLC cache on gen6. As
3061 * a result, we make sure that the pinning that is about to occur is
3062 * done with uncached PTEs. This is lowest common denominator for all
3065 * However for gen6+, we could do better by using the GFDT bit instead
3066 * of uncaching, which would allow us to flush all the LLC-cached data
3067 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
3069 ret
= i915_gem_object_set_cache_level(obj
, I915_CACHE_NONE
);
3073 /* As the user may map the buffer once pinned in the display plane
3074 * (e.g. libkms for the bootup splash), we have to ensure that we
3075 * always use map_and_fenceable for all scanout buffers.
3077 ret
= i915_gem_object_pin(obj
, alignment
, true);
3081 i915_gem_object_flush_cpu_write_domain(obj
);
3083 old_write_domain
= obj
->base
.write_domain
;
3084 old_read_domains
= obj
->base
.read_domains
;
3086 /* It should now be out of any other write domains, and we can update
3087 * the domain values for our changes.
3089 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_GTT
) != 0);
3090 obj
->base
.read_domains
|= I915_GEM_DOMAIN_GTT
;
3092 trace_i915_gem_object_change_domain(obj
,
3100 i915_gem_object_finish_gpu(struct drm_i915_gem_object
*obj
)
3104 if ((obj
->base
.read_domains
& I915_GEM_GPU_DOMAINS
) == 0)
3107 if (obj
->base
.write_domain
& I915_GEM_GPU_DOMAINS
) {
3108 ret
= i915_gem_flush_ring(obj
->ring
, 0, obj
->base
.write_domain
);
3113 ret
= i915_gem_object_wait_rendering(obj
);
3117 /* Ensure that we invalidate the GPU's caches and TLBs. */
3118 obj
->base
.read_domains
&= ~I915_GEM_GPU_DOMAINS
;
3123 * Moves a single object to the CPU read, and possibly write domain.
3125 * This function returns when the move is complete, including waiting on
3129 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object
*obj
, bool write
)
3131 uint32_t old_write_domain
, old_read_domains
;
3134 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_CPU
)
3137 ret
= i915_gem_object_flush_gpu_write_domain(obj
);
3141 if (write
|| obj
->pending_gpu_write
) {
3142 ret
= i915_gem_object_wait_rendering(obj
);
3147 i915_gem_object_flush_gtt_write_domain(obj
);
3149 old_write_domain
= obj
->base
.write_domain
;
3150 old_read_domains
= obj
->base
.read_domains
;
3152 /* Flush the CPU cache if it's still invalid. */
3153 if ((obj
->base
.read_domains
& I915_GEM_DOMAIN_CPU
) == 0) {
3154 i915_gem_clflush_object(obj
);
3156 obj
->base
.read_domains
|= I915_GEM_DOMAIN_CPU
;
3159 /* It should now be out of any other write domains, and we can update
3160 * the domain values for our changes.
3162 BUG_ON((obj
->base
.write_domain
& ~I915_GEM_DOMAIN_CPU
) != 0);
3164 /* If we're writing through the CPU, then the GPU read domains will
3165 * need to be invalidated at next use.
3168 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3169 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3172 trace_i915_gem_object_change_domain(obj
,
3179 /* Throttle our rendering by waiting until the ring has completed our requests
3180 * emitted over 20 msec ago.
3182 * Note that if we were to use the current jiffies each time around the loop,
3183 * we wouldn't escape the function with any frames outstanding if the time to
3184 * render a frame was over 20ms.
3186 * This should get us reasonable parallelism between CPU and GPU but also
3187 * relatively low latency when blocking on a particular request to finish.
3190 i915_gem_ring_throttle(struct drm_device
*dev
, struct drm_file
*file
)
3192 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3193 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
3194 unsigned long recent_enough
= jiffies
- msecs_to_jiffies(20);
3195 struct drm_i915_gem_request
*request
;
3196 struct intel_ring_buffer
*ring
= NULL
;
3200 if (atomic_read(&dev_priv
->mm
.wedged
))
3203 spin_lock(&file_priv
->mm
.lock
);
3204 list_for_each_entry(request
, &file_priv
->mm
.request_list
, client_list
) {
3205 if (time_after_eq(request
->emitted_jiffies
, recent_enough
))
3208 ring
= request
->ring
;
3209 seqno
= request
->seqno
;
3211 spin_unlock(&file_priv
->mm
.lock
);
3216 ret
= __wait_seqno(ring
, seqno
, true, NULL
);
3218 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, 0);
3224 i915_gem_object_pin(struct drm_i915_gem_object
*obj
,
3226 bool map_and_fenceable
)
3230 BUG_ON(obj
->pin_count
== DRM_I915_GEM_OBJECT_MAX_PIN_COUNT
);
3232 if (obj
->gtt_space
!= NULL
) {
3233 if ((alignment
&& obj
->gtt_offset
& (alignment
- 1)) ||
3234 (map_and_fenceable
&& !obj
->map_and_fenceable
)) {
3235 WARN(obj
->pin_count
,
3236 "bo is already pinned with incorrect alignment:"
3237 " offset=%x, req.alignment=%x, req.map_and_fenceable=%d,"
3238 " obj->map_and_fenceable=%d\n",
3239 obj
->gtt_offset
, alignment
,
3241 obj
->map_and_fenceable
);
3242 ret
= i915_gem_object_unbind(obj
);
3248 if (obj
->gtt_space
== NULL
) {
3249 ret
= i915_gem_object_bind_to_gtt(obj
, alignment
,
3255 if (!obj
->has_global_gtt_mapping
&& map_and_fenceable
)
3256 i915_gem_gtt_bind_object(obj
, obj
->cache_level
);
3259 obj
->pin_mappable
|= map_and_fenceable
;
3265 i915_gem_object_unpin(struct drm_i915_gem_object
*obj
)
3267 BUG_ON(obj
->pin_count
== 0);
3268 BUG_ON(obj
->gtt_space
== NULL
);
3270 if (--obj
->pin_count
== 0)
3271 obj
->pin_mappable
= false;
3275 i915_gem_pin_ioctl(struct drm_device
*dev
, void *data
,
3276 struct drm_file
*file
)
3278 struct drm_i915_gem_pin
*args
= data
;
3279 struct drm_i915_gem_object
*obj
;
3282 ret
= i915_mutex_lock_interruptible(dev
);
3286 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3287 if (&obj
->base
== NULL
) {
3292 if (obj
->madv
!= I915_MADV_WILLNEED
) {
3293 DRM_ERROR("Attempting to pin a purgeable buffer\n");
3298 if (obj
->pin_filp
!= NULL
&& obj
->pin_filp
!= file
) {
3299 DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n",
3305 obj
->user_pin_count
++;
3306 obj
->pin_filp
= file
;
3307 if (obj
->user_pin_count
== 1) {
3308 ret
= i915_gem_object_pin(obj
, args
->alignment
, true);
3313 /* XXX - flush the CPU caches for pinned objects
3314 * as the X server doesn't manage domains yet
3316 i915_gem_object_flush_cpu_write_domain(obj
);
3317 args
->offset
= obj
->gtt_offset
;
3319 drm_gem_object_unreference(&obj
->base
);
3321 mutex_unlock(&dev
->struct_mutex
);
3326 i915_gem_unpin_ioctl(struct drm_device
*dev
, void *data
,
3327 struct drm_file
*file
)
3329 struct drm_i915_gem_pin
*args
= data
;
3330 struct drm_i915_gem_object
*obj
;
3333 ret
= i915_mutex_lock_interruptible(dev
);
3337 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3338 if (&obj
->base
== NULL
) {
3343 if (obj
->pin_filp
!= file
) {
3344 DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n",
3349 obj
->user_pin_count
--;
3350 if (obj
->user_pin_count
== 0) {
3351 obj
->pin_filp
= NULL
;
3352 i915_gem_object_unpin(obj
);
3356 drm_gem_object_unreference(&obj
->base
);
3358 mutex_unlock(&dev
->struct_mutex
);
3363 i915_gem_busy_ioctl(struct drm_device
*dev
, void *data
,
3364 struct drm_file
*file
)
3366 struct drm_i915_gem_busy
*args
= data
;
3367 struct drm_i915_gem_object
*obj
;
3370 ret
= i915_mutex_lock_interruptible(dev
);
3374 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file
, args
->handle
));
3375 if (&obj
->base
== NULL
) {
3380 /* Count all active objects as busy, even if they are currently not used
3381 * by the gpu. Users of this interface expect objects to eventually
3382 * become non-busy without any further actions, therefore emit any
3383 * necessary flushes here.
3385 ret
= i915_gem_object_flush_active(obj
);
3387 args
->busy
= obj
->active
;
3389 drm_gem_object_unreference(&obj
->base
);
3391 mutex_unlock(&dev
->struct_mutex
);
3396 i915_gem_throttle_ioctl(struct drm_device
*dev
, void *data
,
3397 struct drm_file
*file_priv
)
3399 return i915_gem_ring_throttle(dev
, file_priv
);
3403 i915_gem_madvise_ioctl(struct drm_device
*dev
, void *data
,
3404 struct drm_file
*file_priv
)
3406 struct drm_i915_gem_madvise
*args
= data
;
3407 struct drm_i915_gem_object
*obj
;
3410 switch (args
->madv
) {
3411 case I915_MADV_DONTNEED
:
3412 case I915_MADV_WILLNEED
:
3418 ret
= i915_mutex_lock_interruptible(dev
);
3422 obj
= to_intel_bo(drm_gem_object_lookup(dev
, file_priv
, args
->handle
));
3423 if (&obj
->base
== NULL
) {
3428 if (obj
->pin_count
) {
3433 if (obj
->madv
!= __I915_MADV_PURGED
)
3434 obj
->madv
= args
->madv
;
3436 /* if the object is no longer bound, discard its backing storage */
3437 if (i915_gem_object_is_purgeable(obj
) &&
3438 obj
->gtt_space
== NULL
)
3439 i915_gem_object_truncate(obj
);
3441 args
->retained
= obj
->madv
!= __I915_MADV_PURGED
;
3444 drm_gem_object_unreference(&obj
->base
);
3446 mutex_unlock(&dev
->struct_mutex
);
3450 struct drm_i915_gem_object
*i915_gem_alloc_object(struct drm_device
*dev
,
3453 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3454 struct drm_i915_gem_object
*obj
;
3455 struct address_space
*mapping
;
3458 obj
= kzalloc(sizeof(*obj
), GFP_KERNEL
);
3462 if (drm_gem_object_init(dev
, &obj
->base
, size
) != 0) {
3467 mask
= GFP_HIGHUSER
| __GFP_RECLAIMABLE
;
3468 if (IS_CRESTLINE(dev
) || IS_BROADWATER(dev
)) {
3469 /* 965gm cannot relocate objects above 4GiB. */
3470 mask
&= ~__GFP_HIGHMEM
;
3471 mask
|= __GFP_DMA32
;
3474 mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
3475 mapping_set_gfp_mask(mapping
, mask
);
3477 i915_gem_info_add_obj(dev_priv
, size
);
3479 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
3480 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
3483 /* On some devices, we can have the GPU use the LLC (the CPU
3484 * cache) for about a 10% performance improvement
3485 * compared to uncached. Graphics requests other than
3486 * display scanout are coherent with the CPU in
3487 * accessing this cache. This means in this mode we
3488 * don't need to clflush on the CPU side, and on the
3489 * GPU side we only need to flush internal caches to
3490 * get data visible to the CPU.
3492 * However, we maintain the display planes as UC, and so
3493 * need to rebind when first used as such.
3495 obj
->cache_level
= I915_CACHE_LLC
;
3497 obj
->cache_level
= I915_CACHE_NONE
;
3499 obj
->base
.driver_private
= NULL
;
3500 obj
->fence_reg
= I915_FENCE_REG_NONE
;
3501 INIT_LIST_HEAD(&obj
->mm_list
);
3502 INIT_LIST_HEAD(&obj
->gtt_list
);
3503 INIT_LIST_HEAD(&obj
->ring_list
);
3504 INIT_LIST_HEAD(&obj
->exec_list
);
3505 INIT_LIST_HEAD(&obj
->gpu_write_list
);
3506 obj
->madv
= I915_MADV_WILLNEED
;
3507 /* Avoid an unnecessary call to unbind on the first bind. */
3508 obj
->map_and_fenceable
= true;
3513 int i915_gem_init_object(struct drm_gem_object
*obj
)
3520 void i915_gem_free_object(struct drm_gem_object
*gem_obj
)
3522 struct drm_i915_gem_object
*obj
= to_intel_bo(gem_obj
);
3523 struct drm_device
*dev
= obj
->base
.dev
;
3524 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3526 trace_i915_gem_object_destroy(obj
);
3528 if (gem_obj
->import_attach
)
3529 drm_prime_gem_destroy(gem_obj
, obj
->sg_table
);
3532 i915_gem_detach_phys_object(dev
, obj
);
3535 if (WARN_ON(i915_gem_object_unbind(obj
) == -ERESTARTSYS
)) {
3536 bool was_interruptible
;
3538 was_interruptible
= dev_priv
->mm
.interruptible
;
3539 dev_priv
->mm
.interruptible
= false;
3541 WARN_ON(i915_gem_object_unbind(obj
));
3543 dev_priv
->mm
.interruptible
= was_interruptible
;
3546 if (obj
->base
.map_list
.map
)
3547 drm_gem_free_mmap_offset(&obj
->base
);
3549 drm_gem_object_release(&obj
->base
);
3550 i915_gem_info_remove_obj(dev_priv
, obj
->base
.size
);
3557 i915_gem_idle(struct drm_device
*dev
)
3559 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3562 mutex_lock(&dev
->struct_mutex
);
3564 if (dev_priv
->mm
.suspended
) {
3565 mutex_unlock(&dev
->struct_mutex
);
3569 ret
= i915_gpu_idle(dev
);
3571 mutex_unlock(&dev
->struct_mutex
);
3574 i915_gem_retire_requests(dev
);
3576 /* Under UMS, be paranoid and evict. */
3577 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
3578 i915_gem_evict_everything(dev
, false);
3580 i915_gem_reset_fences(dev
);
3582 /* Hack! Don't let anybody do execbuf while we don't control the chip.
3583 * We need to replace this with a semaphore, or something.
3584 * And not confound mm.suspended!
3586 dev_priv
->mm
.suspended
= 1;
3587 del_timer_sync(&dev_priv
->hangcheck_timer
);
3589 i915_kernel_lost_context(dev
);
3590 i915_gem_cleanup_ringbuffer(dev
);
3592 mutex_unlock(&dev
->struct_mutex
);
3594 /* Cancel the retire work handler, which should be idle now. */
3595 cancel_delayed_work_sync(&dev_priv
->mm
.retire_work
);
3600 void i915_gem_l3_remap(struct drm_device
*dev
)
3602 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3606 if (!IS_IVYBRIDGE(dev
))
3609 if (!dev_priv
->mm
.l3_remap_info
)
3612 misccpctl
= I915_READ(GEN7_MISCCPCTL
);
3613 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
& ~GEN7_DOP_CLOCK_GATE_ENABLE
);
3614 POSTING_READ(GEN7_MISCCPCTL
);
3616 for (i
= 0; i
< GEN7_L3LOG_SIZE
; i
+= 4) {
3617 u32 remap
= I915_READ(GEN7_L3LOG_BASE
+ i
);
3618 if (remap
&& remap
!= dev_priv
->mm
.l3_remap_info
[i
/4])
3619 DRM_DEBUG("0x%x was already programmed to %x\n",
3620 GEN7_L3LOG_BASE
+ i
, remap
);
3621 if (remap
&& !dev_priv
->mm
.l3_remap_info
[i
/4])
3622 DRM_DEBUG_DRIVER("Clearing remapped register\n");
3623 I915_WRITE(GEN7_L3LOG_BASE
+ i
, dev_priv
->mm
.l3_remap_info
[i
/4]);
3626 /* Make sure all the writes land before disabling dop clock gating */
3627 POSTING_READ(GEN7_L3LOG_BASE
);
3629 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
);
3632 void i915_gem_init_swizzling(struct drm_device
*dev
)
3634 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3636 if (INTEL_INFO(dev
)->gen
< 5 ||
3637 dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_NONE
)
3640 I915_WRITE(DISP_ARB_CTL
, I915_READ(DISP_ARB_CTL
) |
3641 DISP_TILE_SURFACE_SWIZZLING
);
3646 I915_WRITE(TILECTL
, I915_READ(TILECTL
) | TILECTL_SWZCTL
);
3648 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB
));
3650 I915_WRITE(ARB_MODE
, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB
));
3653 void i915_gem_init_ppgtt(struct drm_device
*dev
)
3655 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3657 struct intel_ring_buffer
*ring
;
3658 struct i915_hw_ppgtt
*ppgtt
= dev_priv
->mm
.aliasing_ppgtt
;
3659 uint32_t __iomem
*pd_addr
;
3663 if (!dev_priv
->mm
.aliasing_ppgtt
)
3667 pd_addr
= dev_priv
->mm
.gtt
->gtt
+ ppgtt
->pd_offset
/sizeof(uint32_t);
3668 for (i
= 0; i
< ppgtt
->num_pd_entries
; i
++) {
3671 if (dev_priv
->mm
.gtt
->needs_dmar
)
3672 pt_addr
= ppgtt
->pt_dma_addr
[i
];
3674 pt_addr
= page_to_phys(ppgtt
->pt_pages
[i
]);
3676 pd_entry
= GEN6_PDE_ADDR_ENCODE(pt_addr
);
3677 pd_entry
|= GEN6_PDE_VALID
;
3679 writel(pd_entry
, pd_addr
+ i
);
3683 pd_offset
= ppgtt
->pd_offset
;
3684 pd_offset
/= 64; /* in cachelines, */
3687 if (INTEL_INFO(dev
)->gen
== 6) {
3688 uint32_t ecochk
, gab_ctl
, ecobits
;
3690 ecobits
= I915_READ(GAC_ECO_BITS
);
3691 I915_WRITE(GAC_ECO_BITS
, ecobits
| ECOBITS_PPGTT_CACHE64B
);
3693 gab_ctl
= I915_READ(GAB_CTL
);
3694 I915_WRITE(GAB_CTL
, gab_ctl
| GAB_CTL_CONT_AFTER_PAGEFAULT
);
3696 ecochk
= I915_READ(GAM_ECOCHK
);
3697 I915_WRITE(GAM_ECOCHK
, ecochk
| ECOCHK_SNB_BIT
|
3698 ECOCHK_PPGTT_CACHE64B
);
3699 I915_WRITE(GFX_MODE
, _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE
));
3700 } else if (INTEL_INFO(dev
)->gen
>= 7) {
3701 I915_WRITE(GAM_ECOCHK
, ECOCHK_PPGTT_CACHE64B
);
3702 /* GFX_MODE is per-ring on gen7+ */
3705 for_each_ring(ring
, dev_priv
, i
) {
3706 if (INTEL_INFO(dev
)->gen
>= 7)
3707 I915_WRITE(RING_MODE_GEN7(ring
),
3708 _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE
));
3710 I915_WRITE(RING_PP_DIR_DCLV(ring
), PP_DIR_DCLV_2G
);
3711 I915_WRITE(RING_PP_DIR_BASE(ring
), pd_offset
);
3716 i915_gem_init_hw(struct drm_device
*dev
)
3718 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3721 if (!intel_enable_gtt())
3724 i915_gem_l3_remap(dev
);
3726 i915_gem_init_swizzling(dev
);
3728 ret
= intel_init_render_ring_buffer(dev
);
3733 ret
= intel_init_bsd_ring_buffer(dev
);
3735 goto cleanup_render_ring
;
3739 ret
= intel_init_blt_ring_buffer(dev
);
3741 goto cleanup_bsd_ring
;
3744 dev_priv
->next_seqno
= 1;
3747 * XXX: There was some w/a described somewhere suggesting loading
3748 * contexts before PPGTT.
3750 i915_gem_context_init(dev
);
3751 i915_gem_init_ppgtt(dev
);
3756 intel_cleanup_ring_buffer(&dev_priv
->ring
[VCS
]);
3757 cleanup_render_ring
:
3758 intel_cleanup_ring_buffer(&dev_priv
->ring
[RCS
]);
3763 intel_enable_ppgtt(struct drm_device
*dev
)
3765 if (i915_enable_ppgtt
>= 0)
3766 return i915_enable_ppgtt
;
3768 #ifdef CONFIG_INTEL_IOMMU
3769 /* Disable ppgtt on SNB if VT-d is on. */
3770 if (INTEL_INFO(dev
)->gen
== 6 && intel_iommu_gfx_mapped
)
3777 int i915_gem_init(struct drm_device
*dev
)
3779 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3780 unsigned long gtt_size
, mappable_size
;
3783 gtt_size
= dev_priv
->mm
.gtt
->gtt_total_entries
<< PAGE_SHIFT
;
3784 mappable_size
= dev_priv
->mm
.gtt
->gtt_mappable_entries
<< PAGE_SHIFT
;
3786 mutex_lock(&dev
->struct_mutex
);
3787 if (intel_enable_ppgtt(dev
) && HAS_ALIASING_PPGTT(dev
)) {
3788 /* PPGTT pdes are stolen from global gtt ptes, so shrink the
3789 * aperture accordingly when using aliasing ppgtt. */
3790 gtt_size
-= I915_PPGTT_PD_ENTRIES
*PAGE_SIZE
;
3792 i915_gem_init_global_gtt(dev
, 0, mappable_size
, gtt_size
);
3794 ret
= i915_gem_init_aliasing_ppgtt(dev
);
3796 mutex_unlock(&dev
->struct_mutex
);
3800 /* Let GEM Manage all of the aperture.
3802 * However, leave one page at the end still bound to the scratch
3803 * page. There are a number of places where the hardware
3804 * apparently prefetches past the end of the object, and we've
3805 * seen multiple hangs with the GPU head pointer stuck in a
3806 * batchbuffer bound at the last page of the aperture. One page
3807 * should be enough to keep any prefetching inside of the
3810 i915_gem_init_global_gtt(dev
, 0, mappable_size
,
3814 ret
= i915_gem_init_hw(dev
);
3815 mutex_unlock(&dev
->struct_mutex
);
3817 i915_gem_cleanup_aliasing_ppgtt(dev
);
3821 /* Allow hardware batchbuffers unless told otherwise, but not for KMS. */
3822 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
3823 dev_priv
->dri1
.allow_batchbuffer
= 1;
3828 i915_gem_cleanup_ringbuffer(struct drm_device
*dev
)
3830 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3831 struct intel_ring_buffer
*ring
;
3834 for_each_ring(ring
, dev_priv
, i
)
3835 intel_cleanup_ring_buffer(ring
);
3839 i915_gem_entervt_ioctl(struct drm_device
*dev
, void *data
,
3840 struct drm_file
*file_priv
)
3842 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3845 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
3848 if (atomic_read(&dev_priv
->mm
.wedged
)) {
3849 DRM_ERROR("Reenabling wedged hardware, good luck\n");
3850 atomic_set(&dev_priv
->mm
.wedged
, 0);
3853 mutex_lock(&dev
->struct_mutex
);
3854 dev_priv
->mm
.suspended
= 0;
3856 ret
= i915_gem_init_hw(dev
);
3858 mutex_unlock(&dev
->struct_mutex
);
3862 BUG_ON(!list_empty(&dev_priv
->mm
.active_list
));
3863 BUG_ON(!list_empty(&dev_priv
->mm
.flushing_list
));
3864 BUG_ON(!list_empty(&dev_priv
->mm
.inactive_list
));
3865 mutex_unlock(&dev
->struct_mutex
);
3867 ret
= drm_irq_install(dev
);
3869 goto cleanup_ringbuffer
;
3874 mutex_lock(&dev
->struct_mutex
);
3875 i915_gem_cleanup_ringbuffer(dev
);
3876 dev_priv
->mm
.suspended
= 1;
3877 mutex_unlock(&dev
->struct_mutex
);
3883 i915_gem_leavevt_ioctl(struct drm_device
*dev
, void *data
,
3884 struct drm_file
*file_priv
)
3886 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
3889 drm_irq_uninstall(dev
);
3890 return i915_gem_idle(dev
);
3894 i915_gem_lastclose(struct drm_device
*dev
)
3898 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
3901 ret
= i915_gem_idle(dev
);
3903 DRM_ERROR("failed to idle hardware: %d\n", ret
);
3907 init_ring_lists(struct intel_ring_buffer
*ring
)
3909 INIT_LIST_HEAD(&ring
->active_list
);
3910 INIT_LIST_HEAD(&ring
->request_list
);
3911 INIT_LIST_HEAD(&ring
->gpu_write_list
);
3915 i915_gem_load(struct drm_device
*dev
)
3918 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3920 INIT_LIST_HEAD(&dev_priv
->mm
.active_list
);
3921 INIT_LIST_HEAD(&dev_priv
->mm
.flushing_list
);
3922 INIT_LIST_HEAD(&dev_priv
->mm
.inactive_list
);
3923 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
3924 INIT_LIST_HEAD(&dev_priv
->mm
.gtt_list
);
3925 for (i
= 0; i
< I915_NUM_RINGS
; i
++)
3926 init_ring_lists(&dev_priv
->ring
[i
]);
3927 for (i
= 0; i
< I915_MAX_NUM_FENCES
; i
++)
3928 INIT_LIST_HEAD(&dev_priv
->fence_regs
[i
].lru_list
);
3929 INIT_DELAYED_WORK(&dev_priv
->mm
.retire_work
,
3930 i915_gem_retire_work_handler
);
3931 init_completion(&dev_priv
->error_completion
);
3933 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
3935 I915_WRITE(MI_ARB_STATE
,
3936 _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE
));
3939 dev_priv
->relative_constants_mode
= I915_EXEC_CONSTANTS_REL_GENERAL
;
3941 /* Old X drivers will take 0-2 for front, back, depth buffers */
3942 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
3943 dev_priv
->fence_reg_start
= 3;
3945 if (INTEL_INFO(dev
)->gen
>= 4 || IS_I945G(dev
) || IS_I945GM(dev
) || IS_G33(dev
))
3946 dev_priv
->num_fence_regs
= 16;
3948 dev_priv
->num_fence_regs
= 8;
3950 /* Initialize fence registers to zero */
3951 i915_gem_reset_fences(dev
);
3953 i915_gem_detect_bit_6_swizzle(dev
);
3954 init_waitqueue_head(&dev_priv
->pending_flip_queue
);
3956 dev_priv
->mm
.interruptible
= true;
3958 dev_priv
->mm
.inactive_shrinker
.shrink
= i915_gem_inactive_shrink
;
3959 dev_priv
->mm
.inactive_shrinker
.seeks
= DEFAULT_SEEKS
;
3960 register_shrinker(&dev_priv
->mm
.inactive_shrinker
);
3964 * Create a physically contiguous memory object for this object
3965 * e.g. for cursor + overlay regs
3967 static int i915_gem_init_phys_object(struct drm_device
*dev
,
3968 int id
, int size
, int align
)
3970 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3971 struct drm_i915_gem_phys_object
*phys_obj
;
3974 if (dev_priv
->mm
.phys_objs
[id
- 1] || !size
)
3977 phys_obj
= kzalloc(sizeof(struct drm_i915_gem_phys_object
), GFP_KERNEL
);
3983 phys_obj
->handle
= drm_pci_alloc(dev
, size
, align
);
3984 if (!phys_obj
->handle
) {
3989 set_memory_wc((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
3992 dev_priv
->mm
.phys_objs
[id
- 1] = phys_obj
;
4000 static void i915_gem_free_phys_object(struct drm_device
*dev
, int id
)
4002 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4003 struct drm_i915_gem_phys_object
*phys_obj
;
4005 if (!dev_priv
->mm
.phys_objs
[id
- 1])
4008 phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4009 if (phys_obj
->cur_obj
) {
4010 i915_gem_detach_phys_object(dev
, phys_obj
->cur_obj
);
4014 set_memory_wb((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
4016 drm_pci_free(dev
, phys_obj
->handle
);
4018 dev_priv
->mm
.phys_objs
[id
- 1] = NULL
;
4021 void i915_gem_free_all_phys_object(struct drm_device
*dev
)
4025 for (i
= I915_GEM_PHYS_CURSOR_0
; i
<= I915_MAX_PHYS_OBJECT
; i
++)
4026 i915_gem_free_phys_object(dev
, i
);
4029 void i915_gem_detach_phys_object(struct drm_device
*dev
,
4030 struct drm_i915_gem_object
*obj
)
4032 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
4039 vaddr
= obj
->phys_obj
->handle
->vaddr
;
4041 page_count
= obj
->base
.size
/ PAGE_SIZE
;
4042 for (i
= 0; i
< page_count
; i
++) {
4043 struct page
*page
= shmem_read_mapping_page(mapping
, i
);
4044 if (!IS_ERR(page
)) {
4045 char *dst
= kmap_atomic(page
);
4046 memcpy(dst
, vaddr
+ i
*PAGE_SIZE
, PAGE_SIZE
);
4049 drm_clflush_pages(&page
, 1);
4051 set_page_dirty(page
);
4052 mark_page_accessed(page
);
4053 page_cache_release(page
);
4056 intel_gtt_chipset_flush();
4058 obj
->phys_obj
->cur_obj
= NULL
;
4059 obj
->phys_obj
= NULL
;
4063 i915_gem_attach_phys_object(struct drm_device
*dev
,
4064 struct drm_i915_gem_object
*obj
,
4068 struct address_space
*mapping
= obj
->base
.filp
->f_path
.dentry
->d_inode
->i_mapping
;
4069 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4074 if (id
> I915_MAX_PHYS_OBJECT
)
4077 if (obj
->phys_obj
) {
4078 if (obj
->phys_obj
->id
== id
)
4080 i915_gem_detach_phys_object(dev
, obj
);
4083 /* create a new object */
4084 if (!dev_priv
->mm
.phys_objs
[id
- 1]) {
4085 ret
= i915_gem_init_phys_object(dev
, id
,
4086 obj
->base
.size
, align
);
4088 DRM_ERROR("failed to init phys object %d size: %zu\n",
4089 id
, obj
->base
.size
);
4094 /* bind to the object */
4095 obj
->phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4096 obj
->phys_obj
->cur_obj
= obj
;
4098 page_count
= obj
->base
.size
/ PAGE_SIZE
;
4100 for (i
= 0; i
< page_count
; i
++) {
4104 page
= shmem_read_mapping_page(mapping
, i
);
4106 return PTR_ERR(page
);
4108 src
= kmap_atomic(page
);
4109 dst
= obj
->phys_obj
->handle
->vaddr
+ (i
* PAGE_SIZE
);
4110 memcpy(dst
, src
, PAGE_SIZE
);
4113 mark_page_accessed(page
);
4114 page_cache_release(page
);
4121 i915_gem_phys_pwrite(struct drm_device
*dev
,
4122 struct drm_i915_gem_object
*obj
,
4123 struct drm_i915_gem_pwrite
*args
,
4124 struct drm_file
*file_priv
)
4126 void *vaddr
= obj
->phys_obj
->handle
->vaddr
+ args
->offset
;
4127 char __user
*user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
4129 if (__copy_from_user_inatomic_nocache(vaddr
, user_data
, args
->size
)) {
4130 unsigned long unwritten
;
4132 /* The physical object once assigned is fixed for the lifetime
4133 * of the obj, so we can safely drop the lock and continue
4136 mutex_unlock(&dev
->struct_mutex
);
4137 unwritten
= copy_from_user(vaddr
, user_data
, args
->size
);
4138 mutex_lock(&dev
->struct_mutex
);
4143 intel_gtt_chipset_flush();
4147 void i915_gem_release(struct drm_device
*dev
, struct drm_file
*file
)
4149 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
4151 /* Clean up our request list when the client is going away, so that
4152 * later retire_requests won't dereference our soon-to-be-gone
4155 spin_lock(&file_priv
->mm
.lock
);
4156 while (!list_empty(&file_priv
->mm
.request_list
)) {
4157 struct drm_i915_gem_request
*request
;
4159 request
= list_first_entry(&file_priv
->mm
.request_list
,
4160 struct drm_i915_gem_request
,
4162 list_del(&request
->client_list
);
4163 request
->file_priv
= NULL
;
4165 spin_unlock(&file_priv
->mm
.lock
);
4169 i915_gpu_is_active(struct drm_device
*dev
)
4171 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4174 lists_empty
= list_empty(&dev_priv
->mm
.flushing_list
) &&
4175 list_empty(&dev_priv
->mm
.active_list
);
4177 return !lists_empty
;
4181 i915_gem_inactive_shrink(struct shrinker
*shrinker
, struct shrink_control
*sc
)
4183 struct drm_i915_private
*dev_priv
=
4184 container_of(shrinker
,
4185 struct drm_i915_private
,
4186 mm
.inactive_shrinker
);
4187 struct drm_device
*dev
= dev_priv
->dev
;
4188 struct drm_i915_gem_object
*obj
, *next
;
4189 int nr_to_scan
= sc
->nr_to_scan
;
4192 if (!mutex_trylock(&dev
->struct_mutex
))
4195 /* "fast-path" to count number of available objects */
4196 if (nr_to_scan
== 0) {
4198 list_for_each_entry(obj
,
4199 &dev_priv
->mm
.inactive_list
,
4202 mutex_unlock(&dev
->struct_mutex
);
4203 return cnt
/ 100 * sysctl_vfs_cache_pressure
;
4207 /* first scan for clean buffers */
4208 i915_gem_retire_requests(dev
);
4210 list_for_each_entry_safe(obj
, next
,
4211 &dev_priv
->mm
.inactive_list
,
4213 if (i915_gem_object_is_purgeable(obj
)) {
4214 if (i915_gem_object_unbind(obj
) == 0 &&
4220 /* second pass, evict/count anything still on the inactive list */
4222 list_for_each_entry_safe(obj
, next
,
4223 &dev_priv
->mm
.inactive_list
,
4226 i915_gem_object_unbind(obj
) == 0)
4232 if (nr_to_scan
&& i915_gpu_is_active(dev
)) {
4234 * We are desperate for pages, so as a last resort, wait
4235 * for the GPU to finish and discard whatever we can.
4236 * This has a dramatic impact to reduce the number of
4237 * OOM-killer events whilst running the GPU aggressively.
4239 if (i915_gpu_idle(dev
) == 0)
4242 mutex_unlock(&dev
->struct_mutex
);
4243 return cnt
/ 100 * sysctl_vfs_cache_pressure
;