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/slab.h>
35 #include <linux/swap.h>
36 #include <linux/pci.h>
37 #include <linux/intel-gtt.h>
39 static uint32_t i915_gem_get_gtt_alignment(struct drm_gem_object
*obj
);
41 static int i915_gem_object_flush_gpu_write_domain(struct drm_gem_object
*obj
,
43 static void i915_gem_object_flush_gtt_write_domain(struct drm_gem_object
*obj
);
44 static void i915_gem_object_flush_cpu_write_domain(struct drm_gem_object
*obj
);
45 static int i915_gem_object_set_to_cpu_domain(struct drm_gem_object
*obj
,
47 static int i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object
*obj
,
50 static void i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object
*obj
);
51 static int i915_gem_object_wait_rendering(struct drm_gem_object
*obj
,
53 static int i915_gem_object_bind_to_gtt(struct drm_gem_object
*obj
,
55 static void i915_gem_clear_fence_reg(struct drm_gem_object
*obj
);
56 static int i915_gem_phys_pwrite(struct drm_device
*dev
, struct drm_gem_object
*obj
,
57 struct drm_i915_gem_pwrite
*args
,
58 struct drm_file
*file_priv
);
59 static void i915_gem_free_object_tail(struct drm_gem_object
*obj
);
62 i915_gem_object_get_pages(struct drm_gem_object
*obj
,
66 i915_gem_object_put_pages(struct drm_gem_object
*obj
);
68 static LIST_HEAD(shrink_list
);
69 static DEFINE_SPINLOCK(shrink_list_lock
);
71 /* some bookkeeping */
72 static void i915_gem_info_add_obj(struct drm_i915_private
*dev_priv
,
75 dev_priv
->mm
.object_count
++;
76 dev_priv
->mm
.object_memory
+= size
;
79 static void i915_gem_info_remove_obj(struct drm_i915_private
*dev_priv
,
82 dev_priv
->mm
.object_count
--;
83 dev_priv
->mm
.object_memory
-= size
;
86 static void i915_gem_info_add_gtt(struct drm_i915_private
*dev_priv
,
89 dev_priv
->mm
.gtt_count
++;
90 dev_priv
->mm
.gtt_memory
+= size
;
93 static void i915_gem_info_remove_gtt(struct drm_i915_private
*dev_priv
,
96 dev_priv
->mm
.gtt_count
--;
97 dev_priv
->mm
.gtt_memory
-= size
;
100 static void i915_gem_info_add_pin(struct drm_i915_private
*dev_priv
,
103 dev_priv
->mm
.pin_count
++;
104 dev_priv
->mm
.pin_memory
+= size
;
107 static void i915_gem_info_remove_pin(struct drm_i915_private
*dev_priv
,
110 dev_priv
->mm
.pin_count
--;
111 dev_priv
->mm
.pin_memory
-= size
;
115 i915_gem_check_is_wedged(struct drm_device
*dev
)
117 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
118 struct completion
*x
= &dev_priv
->error_completion
;
122 if (!atomic_read(&dev_priv
->mm
.wedged
))
125 ret
= wait_for_completion_interruptible(x
);
129 /* Success, we reset the GPU! */
130 if (!atomic_read(&dev_priv
->mm
.wedged
))
133 /* GPU is hung, bump the completion count to account for
134 * the token we just consumed so that we never hit zero and
135 * end up waiting upon a subsequent completion event that
138 spin_lock_irqsave(&x
->wait
.lock
, flags
);
140 spin_unlock_irqrestore(&x
->wait
.lock
, flags
);
144 static int i915_mutex_lock_interruptible(struct drm_device
*dev
)
146 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
149 ret
= i915_gem_check_is_wedged(dev
);
153 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
157 if (atomic_read(&dev_priv
->mm
.wedged
)) {
158 mutex_unlock(&dev
->struct_mutex
);
162 WARN_ON(i915_verify_lists(dev
));
167 i915_gem_object_is_inactive(struct drm_i915_gem_object
*obj_priv
)
169 return obj_priv
->gtt_space
&&
171 obj_priv
->pin_count
== 0;
174 int i915_gem_do_init(struct drm_device
*dev
,
178 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
181 (start
& (PAGE_SIZE
- 1)) != 0 ||
182 (end
& (PAGE_SIZE
- 1)) != 0) {
186 drm_mm_init(&dev_priv
->mm
.gtt_space
, start
,
189 dev_priv
->mm
.gtt_total
= end
- start
;
195 i915_gem_init_ioctl(struct drm_device
*dev
, void *data
,
196 struct drm_file
*file_priv
)
198 struct drm_i915_gem_init
*args
= data
;
201 mutex_lock(&dev
->struct_mutex
);
202 ret
= i915_gem_do_init(dev
, args
->gtt_start
, args
->gtt_end
);
203 mutex_unlock(&dev
->struct_mutex
);
209 i915_gem_get_aperture_ioctl(struct drm_device
*dev
, void *data
,
210 struct drm_file
*file_priv
)
212 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
213 struct drm_i915_gem_get_aperture
*args
= data
;
215 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
218 mutex_lock(&dev
->struct_mutex
);
219 args
->aper_size
= dev_priv
->mm
.gtt_total
;
220 args
->aper_available_size
= args
->aper_size
- dev_priv
->mm
.pin_memory
;
221 mutex_unlock(&dev
->struct_mutex
);
228 * Creates a new mm object and returns a handle to it.
231 i915_gem_create_ioctl(struct drm_device
*dev
, void *data
,
232 struct drm_file
*file_priv
)
234 struct drm_i915_gem_create
*args
= data
;
235 struct drm_gem_object
*obj
;
239 args
->size
= roundup(args
->size
, PAGE_SIZE
);
241 /* Allocate the new object */
242 obj
= i915_gem_alloc_object(dev
, args
->size
);
246 ret
= drm_gem_handle_create(file_priv
, obj
, &handle
);
248 drm_gem_object_release(obj
);
249 i915_gem_info_remove_obj(dev
->dev_private
, obj
->size
);
254 /* drop reference from allocate - handle holds it now */
255 drm_gem_object_unreference(obj
);
256 trace_i915_gem_object_create(obj
);
258 args
->handle
= handle
;
263 fast_shmem_read(struct page
**pages
,
264 loff_t page_base
, int page_offset
,
271 vaddr
= kmap_atomic(pages
[page_base
>> PAGE_SHIFT
], KM_USER0
);
272 ret
= __copy_to_user_inatomic(data
, vaddr
+ page_offset
, length
);
273 kunmap_atomic(vaddr
, KM_USER0
);
278 static int i915_gem_object_needs_bit17_swizzle(struct drm_gem_object
*obj
)
280 drm_i915_private_t
*dev_priv
= obj
->dev
->dev_private
;
281 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
283 return dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_9_10_17
&&
284 obj_priv
->tiling_mode
!= I915_TILING_NONE
;
288 slow_shmem_copy(struct page
*dst_page
,
290 struct page
*src_page
,
294 char *dst_vaddr
, *src_vaddr
;
296 dst_vaddr
= kmap(dst_page
);
297 src_vaddr
= kmap(src_page
);
299 memcpy(dst_vaddr
+ dst_offset
, src_vaddr
+ src_offset
, length
);
306 slow_shmem_bit17_copy(struct page
*gpu_page
,
308 struct page
*cpu_page
,
313 char *gpu_vaddr
, *cpu_vaddr
;
315 /* Use the unswizzled path if this page isn't affected. */
316 if ((page_to_phys(gpu_page
) & (1 << 17)) == 0) {
318 return slow_shmem_copy(cpu_page
, cpu_offset
,
319 gpu_page
, gpu_offset
, length
);
321 return slow_shmem_copy(gpu_page
, gpu_offset
,
322 cpu_page
, cpu_offset
, length
);
325 gpu_vaddr
= kmap(gpu_page
);
326 cpu_vaddr
= kmap(cpu_page
);
328 /* Copy the data, XORing A6 with A17 (1). The user already knows he's
329 * XORing with the other bits (A9 for Y, A9 and A10 for X)
332 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
333 int this_length
= min(cacheline_end
- gpu_offset
, length
);
334 int swizzled_gpu_offset
= gpu_offset
^ 64;
337 memcpy(cpu_vaddr
+ cpu_offset
,
338 gpu_vaddr
+ swizzled_gpu_offset
,
341 memcpy(gpu_vaddr
+ swizzled_gpu_offset
,
342 cpu_vaddr
+ cpu_offset
,
345 cpu_offset
+= this_length
;
346 gpu_offset
+= this_length
;
347 length
-= this_length
;
355 * This is the fast shmem pread path, which attempts to copy_from_user directly
356 * from the backing pages of the object to the user's address space. On a
357 * fault, it fails so we can fall back to i915_gem_shmem_pwrite_slow().
360 i915_gem_shmem_pread_fast(struct drm_device
*dev
, struct drm_gem_object
*obj
,
361 struct drm_i915_gem_pread
*args
,
362 struct drm_file
*file_priv
)
364 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
366 loff_t offset
, page_base
;
367 char __user
*user_data
;
368 int page_offset
, page_length
;
370 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
373 obj_priv
= to_intel_bo(obj
);
374 offset
= args
->offset
;
377 /* Operation in this page
379 * page_base = page offset within aperture
380 * page_offset = offset within page
381 * page_length = bytes to copy for this page
383 page_base
= (offset
& ~(PAGE_SIZE
-1));
384 page_offset
= offset
& (PAGE_SIZE
-1);
385 page_length
= remain
;
386 if ((page_offset
+ remain
) > PAGE_SIZE
)
387 page_length
= PAGE_SIZE
- page_offset
;
389 if (fast_shmem_read(obj_priv
->pages
,
390 page_base
, page_offset
,
391 user_data
, page_length
))
394 remain
-= page_length
;
395 user_data
+= page_length
;
396 offset
+= page_length
;
403 i915_gem_object_get_pages_or_evict(struct drm_gem_object
*obj
)
407 ret
= i915_gem_object_get_pages(obj
, __GFP_NORETRY
| __GFP_NOWARN
);
409 /* If we've insufficient memory to map in the pages, attempt
410 * to make some space by throwing out some old buffers.
412 if (ret
== -ENOMEM
) {
413 struct drm_device
*dev
= obj
->dev
;
415 ret
= i915_gem_evict_something(dev
, obj
->size
,
416 i915_gem_get_gtt_alignment(obj
));
420 ret
= i915_gem_object_get_pages(obj
, 0);
427 * This is the fallback shmem pread path, which allocates temporary storage
428 * in kernel space to copy_to_user into outside of the struct_mutex, so we
429 * can copy out of the object's backing pages while holding the struct mutex
430 * and not take page faults.
433 i915_gem_shmem_pread_slow(struct drm_device
*dev
, struct drm_gem_object
*obj
,
434 struct drm_i915_gem_pread
*args
,
435 struct drm_file
*file_priv
)
437 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
438 struct mm_struct
*mm
= current
->mm
;
439 struct page
**user_pages
;
441 loff_t offset
, pinned_pages
, i
;
442 loff_t first_data_page
, last_data_page
, num_pages
;
443 int shmem_page_index
, shmem_page_offset
;
444 int data_page_index
, data_page_offset
;
447 uint64_t data_ptr
= args
->data_ptr
;
448 int do_bit17_swizzling
;
452 /* Pin the user pages containing the data. We can't fault while
453 * holding the struct mutex, yet we want to hold it while
454 * dereferencing the user data.
456 first_data_page
= data_ptr
/ PAGE_SIZE
;
457 last_data_page
= (data_ptr
+ args
->size
- 1) / PAGE_SIZE
;
458 num_pages
= last_data_page
- first_data_page
+ 1;
460 user_pages
= drm_malloc_ab(num_pages
, sizeof(struct page
*));
461 if (user_pages
== NULL
)
464 mutex_unlock(&dev
->struct_mutex
);
465 down_read(&mm
->mmap_sem
);
466 pinned_pages
= get_user_pages(current
, mm
, (uintptr_t)args
->data_ptr
,
467 num_pages
, 1, 0, user_pages
, NULL
);
468 up_read(&mm
->mmap_sem
);
469 mutex_lock(&dev
->struct_mutex
);
470 if (pinned_pages
< num_pages
) {
475 ret
= i915_gem_object_set_cpu_read_domain_range(obj
,
481 do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
483 obj_priv
= to_intel_bo(obj
);
484 offset
= args
->offset
;
487 /* Operation in this page
489 * shmem_page_index = page number within shmem file
490 * shmem_page_offset = offset within page in shmem file
491 * data_page_index = page number in get_user_pages return
492 * data_page_offset = offset with data_page_index page.
493 * page_length = bytes to copy for this page
495 shmem_page_index
= offset
/ PAGE_SIZE
;
496 shmem_page_offset
= offset
& ~PAGE_MASK
;
497 data_page_index
= data_ptr
/ PAGE_SIZE
- first_data_page
;
498 data_page_offset
= data_ptr
& ~PAGE_MASK
;
500 page_length
= remain
;
501 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
502 page_length
= PAGE_SIZE
- shmem_page_offset
;
503 if ((data_page_offset
+ page_length
) > PAGE_SIZE
)
504 page_length
= PAGE_SIZE
- data_page_offset
;
506 if (do_bit17_swizzling
) {
507 slow_shmem_bit17_copy(obj_priv
->pages
[shmem_page_index
],
509 user_pages
[data_page_index
],
514 slow_shmem_copy(user_pages
[data_page_index
],
516 obj_priv
->pages
[shmem_page_index
],
521 remain
-= page_length
;
522 data_ptr
+= page_length
;
523 offset
+= page_length
;
527 for (i
= 0; i
< pinned_pages
; i
++) {
528 SetPageDirty(user_pages
[i
]);
529 page_cache_release(user_pages
[i
]);
531 drm_free_large(user_pages
);
537 * Reads data from the object referenced by handle.
539 * On error, the contents of *data are undefined.
542 i915_gem_pread_ioctl(struct drm_device
*dev
, void *data
,
543 struct drm_file
*file_priv
)
545 struct drm_i915_gem_pread
*args
= data
;
546 struct drm_gem_object
*obj
;
547 struct drm_i915_gem_object
*obj_priv
;
550 ret
= i915_mutex_lock_interruptible(dev
);
554 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
559 obj_priv
= to_intel_bo(obj
);
561 /* Bounds check source. */
562 if (args
->offset
> obj
->size
|| args
->size
> obj
->size
- args
->offset
) {
570 if (!access_ok(VERIFY_WRITE
,
571 (char __user
*)(uintptr_t)args
->data_ptr
,
577 ret
= fault_in_pages_writeable((char __user
*)(uintptr_t)args
->data_ptr
,
584 ret
= i915_gem_object_get_pages_or_evict(obj
);
588 ret
= i915_gem_object_set_cpu_read_domain_range(obj
,
595 if (!i915_gem_object_needs_bit17_swizzle(obj
))
596 ret
= i915_gem_shmem_pread_fast(dev
, obj
, args
, file_priv
);
598 ret
= i915_gem_shmem_pread_slow(dev
, obj
, args
, file_priv
);
601 i915_gem_object_put_pages(obj
);
603 drm_gem_object_unreference(obj
);
605 mutex_unlock(&dev
->struct_mutex
);
609 /* This is the fast write path which cannot handle
610 * page faults in the source data
614 fast_user_write(struct io_mapping
*mapping
,
615 loff_t page_base
, int page_offset
,
616 char __user
*user_data
,
620 unsigned long unwritten
;
622 vaddr_atomic
= io_mapping_map_atomic_wc(mapping
, page_base
, KM_USER0
);
623 unwritten
= __copy_from_user_inatomic_nocache(vaddr_atomic
+ page_offset
,
625 io_mapping_unmap_atomic(vaddr_atomic
, KM_USER0
);
629 /* Here's the write path which can sleep for
634 slow_kernel_write(struct io_mapping
*mapping
,
635 loff_t gtt_base
, int gtt_offset
,
636 struct page
*user_page
, int user_offset
,
639 char __iomem
*dst_vaddr
;
642 dst_vaddr
= io_mapping_map_wc(mapping
, gtt_base
);
643 src_vaddr
= kmap(user_page
);
645 memcpy_toio(dst_vaddr
+ gtt_offset
,
646 src_vaddr
+ user_offset
,
650 io_mapping_unmap(dst_vaddr
);
654 fast_shmem_write(struct page
**pages
,
655 loff_t page_base
, int page_offset
,
662 vaddr
= kmap_atomic(pages
[page_base
>> PAGE_SHIFT
], KM_USER0
);
663 ret
= __copy_from_user_inatomic(vaddr
+ page_offset
, data
, length
);
664 kunmap_atomic(vaddr
, KM_USER0
);
670 * This is the fast pwrite path, where we copy the data directly from the
671 * user into the GTT, uncached.
674 i915_gem_gtt_pwrite_fast(struct drm_device
*dev
, struct drm_gem_object
*obj
,
675 struct drm_i915_gem_pwrite
*args
,
676 struct drm_file
*file_priv
)
678 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
679 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
681 loff_t offset
, page_base
;
682 char __user
*user_data
;
683 int page_offset
, page_length
;
685 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
688 obj_priv
= to_intel_bo(obj
);
689 offset
= obj_priv
->gtt_offset
+ args
->offset
;
692 /* Operation in this page
694 * page_base = page offset within aperture
695 * page_offset = offset within page
696 * page_length = bytes to copy for this page
698 page_base
= (offset
& ~(PAGE_SIZE
-1));
699 page_offset
= offset
& (PAGE_SIZE
-1);
700 page_length
= remain
;
701 if ((page_offset
+ remain
) > PAGE_SIZE
)
702 page_length
= PAGE_SIZE
- page_offset
;
704 /* If we get a fault while copying data, then (presumably) our
705 * source page isn't available. Return the error and we'll
706 * retry in the slow path.
708 if (fast_user_write(dev_priv
->mm
.gtt_mapping
, page_base
,
709 page_offset
, user_data
, page_length
))
713 remain
-= page_length
;
714 user_data
+= page_length
;
715 offset
+= page_length
;
722 * This is the fallback GTT pwrite path, which uses get_user_pages to pin
723 * the memory and maps it using kmap_atomic for copying.
725 * This code resulted in x11perf -rgb10text consuming about 10% more CPU
726 * than using i915_gem_gtt_pwrite_fast on a G45 (32-bit).
729 i915_gem_gtt_pwrite_slow(struct drm_device
*dev
, struct drm_gem_object
*obj
,
730 struct drm_i915_gem_pwrite
*args
,
731 struct drm_file
*file_priv
)
733 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
734 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
736 loff_t gtt_page_base
, offset
;
737 loff_t first_data_page
, last_data_page
, num_pages
;
738 loff_t pinned_pages
, i
;
739 struct page
**user_pages
;
740 struct mm_struct
*mm
= current
->mm
;
741 int gtt_page_offset
, data_page_offset
, data_page_index
, page_length
;
743 uint64_t data_ptr
= args
->data_ptr
;
747 /* Pin the user pages containing the data. We can't fault while
748 * holding the struct mutex, and all of the pwrite implementations
749 * want to hold it while dereferencing the user data.
751 first_data_page
= data_ptr
/ PAGE_SIZE
;
752 last_data_page
= (data_ptr
+ args
->size
- 1) / PAGE_SIZE
;
753 num_pages
= last_data_page
- first_data_page
+ 1;
755 user_pages
= drm_malloc_ab(num_pages
, sizeof(struct page
*));
756 if (user_pages
== NULL
)
759 mutex_unlock(&dev
->struct_mutex
);
760 down_read(&mm
->mmap_sem
);
761 pinned_pages
= get_user_pages(current
, mm
, (uintptr_t)args
->data_ptr
,
762 num_pages
, 0, 0, user_pages
, NULL
);
763 up_read(&mm
->mmap_sem
);
764 mutex_lock(&dev
->struct_mutex
);
765 if (pinned_pages
< num_pages
) {
767 goto out_unpin_pages
;
770 ret
= i915_gem_object_set_to_gtt_domain(obj
, 1);
772 goto out_unpin_pages
;
774 obj_priv
= to_intel_bo(obj
);
775 offset
= obj_priv
->gtt_offset
+ args
->offset
;
778 /* Operation in this page
780 * gtt_page_base = page offset within aperture
781 * gtt_page_offset = offset within page in aperture
782 * data_page_index = page number in get_user_pages return
783 * data_page_offset = offset with data_page_index page.
784 * page_length = bytes to copy for this page
786 gtt_page_base
= offset
& PAGE_MASK
;
787 gtt_page_offset
= offset
& ~PAGE_MASK
;
788 data_page_index
= data_ptr
/ PAGE_SIZE
- first_data_page
;
789 data_page_offset
= data_ptr
& ~PAGE_MASK
;
791 page_length
= remain
;
792 if ((gtt_page_offset
+ page_length
) > PAGE_SIZE
)
793 page_length
= PAGE_SIZE
- gtt_page_offset
;
794 if ((data_page_offset
+ page_length
) > PAGE_SIZE
)
795 page_length
= PAGE_SIZE
- data_page_offset
;
797 slow_kernel_write(dev_priv
->mm
.gtt_mapping
,
798 gtt_page_base
, gtt_page_offset
,
799 user_pages
[data_page_index
],
803 remain
-= page_length
;
804 offset
+= page_length
;
805 data_ptr
+= page_length
;
809 for (i
= 0; i
< pinned_pages
; i
++)
810 page_cache_release(user_pages
[i
]);
811 drm_free_large(user_pages
);
817 * This is the fast shmem pwrite path, which attempts to directly
818 * copy_from_user into the kmapped pages backing the object.
821 i915_gem_shmem_pwrite_fast(struct drm_device
*dev
, struct drm_gem_object
*obj
,
822 struct drm_i915_gem_pwrite
*args
,
823 struct drm_file
*file_priv
)
825 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
827 loff_t offset
, page_base
;
828 char __user
*user_data
;
829 int page_offset
, page_length
;
831 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
834 obj_priv
= to_intel_bo(obj
);
835 offset
= args
->offset
;
839 /* Operation in this page
841 * page_base = page offset within aperture
842 * page_offset = offset within page
843 * page_length = bytes to copy for this page
845 page_base
= (offset
& ~(PAGE_SIZE
-1));
846 page_offset
= offset
& (PAGE_SIZE
-1);
847 page_length
= remain
;
848 if ((page_offset
+ remain
) > PAGE_SIZE
)
849 page_length
= PAGE_SIZE
- page_offset
;
851 if (fast_shmem_write(obj_priv
->pages
,
852 page_base
, page_offset
,
853 user_data
, page_length
))
856 remain
-= page_length
;
857 user_data
+= page_length
;
858 offset
+= page_length
;
865 * This is the fallback shmem pwrite path, which uses get_user_pages to pin
866 * the memory and maps it using kmap_atomic for copying.
868 * This avoids taking mmap_sem for faulting on the user's address while the
869 * struct_mutex is held.
872 i915_gem_shmem_pwrite_slow(struct drm_device
*dev
, struct drm_gem_object
*obj
,
873 struct drm_i915_gem_pwrite
*args
,
874 struct drm_file
*file_priv
)
876 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
877 struct mm_struct
*mm
= current
->mm
;
878 struct page
**user_pages
;
880 loff_t offset
, pinned_pages
, i
;
881 loff_t first_data_page
, last_data_page
, num_pages
;
882 int shmem_page_index
, shmem_page_offset
;
883 int data_page_index
, data_page_offset
;
886 uint64_t data_ptr
= args
->data_ptr
;
887 int do_bit17_swizzling
;
891 /* Pin the user pages containing the data. We can't fault while
892 * holding the struct mutex, and all of the pwrite implementations
893 * want to hold it while dereferencing the user data.
895 first_data_page
= data_ptr
/ PAGE_SIZE
;
896 last_data_page
= (data_ptr
+ args
->size
- 1) / PAGE_SIZE
;
897 num_pages
= last_data_page
- first_data_page
+ 1;
899 user_pages
= drm_malloc_ab(num_pages
, sizeof(struct page
*));
900 if (user_pages
== NULL
)
903 mutex_unlock(&dev
->struct_mutex
);
904 down_read(&mm
->mmap_sem
);
905 pinned_pages
= get_user_pages(current
, mm
, (uintptr_t)args
->data_ptr
,
906 num_pages
, 0, 0, user_pages
, NULL
);
907 up_read(&mm
->mmap_sem
);
908 mutex_lock(&dev
->struct_mutex
);
909 if (pinned_pages
< num_pages
) {
914 ret
= i915_gem_object_set_to_cpu_domain(obj
, 1);
918 do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
920 obj_priv
= to_intel_bo(obj
);
921 offset
= args
->offset
;
925 /* Operation in this page
927 * shmem_page_index = page number within shmem file
928 * shmem_page_offset = offset within page in shmem file
929 * data_page_index = page number in get_user_pages return
930 * data_page_offset = offset with data_page_index page.
931 * page_length = bytes to copy for this page
933 shmem_page_index
= offset
/ PAGE_SIZE
;
934 shmem_page_offset
= offset
& ~PAGE_MASK
;
935 data_page_index
= data_ptr
/ PAGE_SIZE
- first_data_page
;
936 data_page_offset
= data_ptr
& ~PAGE_MASK
;
938 page_length
= remain
;
939 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
940 page_length
= PAGE_SIZE
- shmem_page_offset
;
941 if ((data_page_offset
+ page_length
) > PAGE_SIZE
)
942 page_length
= PAGE_SIZE
- data_page_offset
;
944 if (do_bit17_swizzling
) {
945 slow_shmem_bit17_copy(obj_priv
->pages
[shmem_page_index
],
947 user_pages
[data_page_index
],
952 slow_shmem_copy(obj_priv
->pages
[shmem_page_index
],
954 user_pages
[data_page_index
],
959 remain
-= page_length
;
960 data_ptr
+= page_length
;
961 offset
+= page_length
;
965 for (i
= 0; i
< pinned_pages
; i
++)
966 page_cache_release(user_pages
[i
]);
967 drm_free_large(user_pages
);
973 * Writes data to the object referenced by handle.
975 * On error, the contents of the buffer that were to be modified are undefined.
978 i915_gem_pwrite_ioctl(struct drm_device
*dev
, void *data
,
979 struct drm_file
*file
)
981 struct drm_i915_gem_pwrite
*args
= data
;
982 struct drm_gem_object
*obj
;
983 struct drm_i915_gem_object
*obj_priv
;
986 ret
= i915_mutex_lock_interruptible(dev
);
990 obj
= drm_gem_object_lookup(dev
, file
, args
->handle
);
995 obj_priv
= to_intel_bo(obj
);
998 /* Bounds check destination. */
999 if (args
->offset
> obj
->size
|| args
->size
> obj
->size
- args
->offset
) {
1004 if (args
->size
== 0)
1007 if (!access_ok(VERIFY_READ
,
1008 (char __user
*)(uintptr_t)args
->data_ptr
,
1014 ret
= fault_in_pages_readable((char __user
*)(uintptr_t)args
->data_ptr
,
1021 /* We can only do the GTT pwrite on untiled buffers, as otherwise
1022 * it would end up going through the fenced access, and we'll get
1023 * different detiling behavior between reading and writing.
1024 * pread/pwrite currently are reading and writing from the CPU
1025 * perspective, requiring manual detiling by the client.
1027 if (obj_priv
->phys_obj
)
1028 ret
= i915_gem_phys_pwrite(dev
, obj
, args
, file
);
1029 else if (obj_priv
->tiling_mode
== I915_TILING_NONE
&&
1030 obj_priv
->gtt_space
&&
1031 obj
->write_domain
!= I915_GEM_DOMAIN_CPU
) {
1032 ret
= i915_gem_object_pin(obj
, 0);
1036 ret
= i915_gem_object_set_to_gtt_domain(obj
, 1);
1040 ret
= i915_gem_gtt_pwrite_fast(dev
, obj
, args
, file
);
1042 ret
= i915_gem_gtt_pwrite_slow(dev
, obj
, args
, file
);
1045 i915_gem_object_unpin(obj
);
1047 ret
= i915_gem_object_get_pages_or_evict(obj
);
1051 ret
= i915_gem_object_set_to_cpu_domain(obj
, 1);
1056 if (!i915_gem_object_needs_bit17_swizzle(obj
))
1057 ret
= i915_gem_shmem_pwrite_fast(dev
, obj
, args
, file
);
1059 ret
= i915_gem_shmem_pwrite_slow(dev
, obj
, args
, file
);
1062 i915_gem_object_put_pages(obj
);
1066 drm_gem_object_unreference(obj
);
1068 mutex_unlock(&dev
->struct_mutex
);
1073 * Called when user space prepares to use an object with the CPU, either
1074 * through the mmap ioctl's mapping or a GTT mapping.
1077 i915_gem_set_domain_ioctl(struct drm_device
*dev
, void *data
,
1078 struct drm_file
*file_priv
)
1080 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1081 struct drm_i915_gem_set_domain
*args
= data
;
1082 struct drm_gem_object
*obj
;
1083 struct drm_i915_gem_object
*obj_priv
;
1084 uint32_t read_domains
= args
->read_domains
;
1085 uint32_t write_domain
= args
->write_domain
;
1088 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
1091 /* Only handle setting domains to types used by the CPU. */
1092 if (write_domain
& I915_GEM_GPU_DOMAINS
)
1095 if (read_domains
& I915_GEM_GPU_DOMAINS
)
1098 /* Having something in the write domain implies it's in the read
1099 * domain, and only that read domain. Enforce that in the request.
1101 if (write_domain
!= 0 && read_domains
!= write_domain
)
1104 ret
= i915_mutex_lock_interruptible(dev
);
1108 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
1113 obj_priv
= to_intel_bo(obj
);
1115 intel_mark_busy(dev
, obj
);
1117 if (read_domains
& I915_GEM_DOMAIN_GTT
) {
1118 ret
= i915_gem_object_set_to_gtt_domain(obj
, write_domain
!= 0);
1120 /* Update the LRU on the fence for the CPU access that's
1123 if (obj_priv
->fence_reg
!= I915_FENCE_REG_NONE
) {
1124 struct drm_i915_fence_reg
*reg
=
1125 &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
1126 list_move_tail(®
->lru_list
,
1127 &dev_priv
->mm
.fence_list
);
1130 /* Silently promote "you're not bound, there was nothing to do"
1131 * to success, since the client was just asking us to
1132 * make sure everything was done.
1137 ret
= i915_gem_object_set_to_cpu_domain(obj
, write_domain
!= 0);
1140 /* Maintain LRU order of "inactive" objects */
1141 if (ret
== 0 && i915_gem_object_is_inactive(obj_priv
))
1142 list_move_tail(&obj_priv
->list
, &dev_priv
->mm
.inactive_list
);
1144 drm_gem_object_unreference(obj
);
1146 mutex_unlock(&dev
->struct_mutex
);
1151 * Called when user space has done writes to this buffer
1154 i915_gem_sw_finish_ioctl(struct drm_device
*dev
, void *data
,
1155 struct drm_file
*file_priv
)
1157 struct drm_i915_gem_sw_finish
*args
= data
;
1158 struct drm_gem_object
*obj
;
1161 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
1164 ret
= i915_mutex_lock_interruptible(dev
);
1168 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
1174 /* Pinned buffers may be scanout, so flush the cache */
1175 if (to_intel_bo(obj
)->pin_count
)
1176 i915_gem_object_flush_cpu_write_domain(obj
);
1178 drm_gem_object_unreference(obj
);
1180 mutex_unlock(&dev
->struct_mutex
);
1185 * Maps the contents of an object, returning the address it is mapped
1188 * While the mapping holds a reference on the contents of the object, it doesn't
1189 * imply a ref on the object itself.
1192 i915_gem_mmap_ioctl(struct drm_device
*dev
, void *data
,
1193 struct drm_file
*file_priv
)
1195 struct drm_i915_gem_mmap
*args
= data
;
1196 struct drm_gem_object
*obj
;
1200 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
1203 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
1207 offset
= args
->offset
;
1209 down_write(¤t
->mm
->mmap_sem
);
1210 addr
= do_mmap(obj
->filp
, 0, args
->size
,
1211 PROT_READ
| PROT_WRITE
, MAP_SHARED
,
1213 up_write(¤t
->mm
->mmap_sem
);
1214 drm_gem_object_unreference_unlocked(obj
);
1215 if (IS_ERR((void *)addr
))
1218 args
->addr_ptr
= (uint64_t) addr
;
1224 * i915_gem_fault - fault a page into the GTT
1225 * vma: VMA in question
1228 * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped
1229 * from userspace. The fault handler takes care of binding the object to
1230 * the GTT (if needed), allocating and programming a fence register (again,
1231 * only if needed based on whether the old reg is still valid or the object
1232 * is tiled) and inserting a new PTE into the faulting process.
1234 * Note that the faulting process may involve evicting existing objects
1235 * from the GTT and/or fence registers to make room. So performance may
1236 * suffer if the GTT working set is large or there are few fence registers
1239 int i915_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
1241 struct drm_gem_object
*obj
= vma
->vm_private_data
;
1242 struct drm_device
*dev
= obj
->dev
;
1243 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1244 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1245 pgoff_t page_offset
;
1248 bool write
= !!(vmf
->flags
& FAULT_FLAG_WRITE
);
1250 /* We don't use vmf->pgoff since that has the fake offset */
1251 page_offset
= ((unsigned long)vmf
->virtual_address
- vma
->vm_start
) >>
1254 /* Now bind it into the GTT if needed */
1255 mutex_lock(&dev
->struct_mutex
);
1256 if (!obj_priv
->gtt_space
) {
1257 ret
= i915_gem_object_bind_to_gtt(obj
, 0);
1261 ret
= i915_gem_object_set_to_gtt_domain(obj
, write
);
1266 /* Need a new fence register? */
1267 if (obj_priv
->tiling_mode
!= I915_TILING_NONE
) {
1268 ret
= i915_gem_object_get_fence_reg(obj
, true);
1273 if (i915_gem_object_is_inactive(obj_priv
))
1274 list_move_tail(&obj_priv
->list
, &dev_priv
->mm
.inactive_list
);
1276 pfn
= ((dev
->agp
->base
+ obj_priv
->gtt_offset
) >> PAGE_SHIFT
) +
1279 /* Finally, remap it using the new GTT offset */
1280 ret
= vm_insert_pfn(vma
, (unsigned long)vmf
->virtual_address
, pfn
);
1282 mutex_unlock(&dev
->struct_mutex
);
1287 return VM_FAULT_NOPAGE
;
1290 return VM_FAULT_OOM
;
1292 return VM_FAULT_SIGBUS
;
1297 * i915_gem_create_mmap_offset - create a fake mmap offset for an object
1298 * @obj: obj in question
1300 * GEM memory mapping works by handing back to userspace a fake mmap offset
1301 * it can use in a subsequent mmap(2) call. The DRM core code then looks
1302 * up the object based on the offset and sets up the various memory mapping
1305 * This routine allocates and attaches a fake offset for @obj.
1308 i915_gem_create_mmap_offset(struct drm_gem_object
*obj
)
1310 struct drm_device
*dev
= obj
->dev
;
1311 struct drm_gem_mm
*mm
= dev
->mm_private
;
1312 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1313 struct drm_map_list
*list
;
1314 struct drm_local_map
*map
;
1317 /* Set the object up for mmap'ing */
1318 list
= &obj
->map_list
;
1319 list
->map
= kzalloc(sizeof(struct drm_map_list
), GFP_KERNEL
);
1324 map
->type
= _DRM_GEM
;
1325 map
->size
= obj
->size
;
1328 /* Get a DRM GEM mmap offset allocated... */
1329 list
->file_offset_node
= drm_mm_search_free(&mm
->offset_manager
,
1330 obj
->size
/ PAGE_SIZE
, 0, 0);
1331 if (!list
->file_offset_node
) {
1332 DRM_ERROR("failed to allocate offset for bo %d\n", obj
->name
);
1337 list
->file_offset_node
= drm_mm_get_block(list
->file_offset_node
,
1338 obj
->size
/ PAGE_SIZE
, 0);
1339 if (!list
->file_offset_node
) {
1344 list
->hash
.key
= list
->file_offset_node
->start
;
1345 ret
= drm_ht_insert_item(&mm
->offset_hash
, &list
->hash
);
1347 DRM_ERROR("failed to add to map hash\n");
1351 /* By now we should be all set, any drm_mmap request on the offset
1352 * below will get to our mmap & fault handler */
1353 obj_priv
->mmap_offset
= ((uint64_t) list
->hash
.key
) << PAGE_SHIFT
;
1358 drm_mm_put_block(list
->file_offset_node
);
1366 * i915_gem_release_mmap - remove physical page mappings
1367 * @obj: obj in question
1369 * Preserve the reservation of the mmapping with the DRM core code, but
1370 * relinquish ownership of the pages back to the system.
1372 * It is vital that we remove the page mapping if we have mapped a tiled
1373 * object through the GTT and then lose the fence register due to
1374 * resource pressure. Similarly if the object has been moved out of the
1375 * aperture, than pages mapped into userspace must be revoked. Removing the
1376 * mapping will then trigger a page fault on the next user access, allowing
1377 * fixup by i915_gem_fault().
1380 i915_gem_release_mmap(struct drm_gem_object
*obj
)
1382 struct drm_device
*dev
= obj
->dev
;
1383 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1385 if (dev
->dev_mapping
)
1386 unmap_mapping_range(dev
->dev_mapping
,
1387 obj_priv
->mmap_offset
, obj
->size
, 1);
1391 i915_gem_free_mmap_offset(struct drm_gem_object
*obj
)
1393 struct drm_device
*dev
= obj
->dev
;
1394 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1395 struct drm_gem_mm
*mm
= dev
->mm_private
;
1396 struct drm_map_list
*list
;
1398 list
= &obj
->map_list
;
1399 drm_ht_remove_item(&mm
->offset_hash
, &list
->hash
);
1401 if (list
->file_offset_node
) {
1402 drm_mm_put_block(list
->file_offset_node
);
1403 list
->file_offset_node
= NULL
;
1411 obj_priv
->mmap_offset
= 0;
1415 * i915_gem_get_gtt_alignment - return required GTT alignment for an object
1416 * @obj: object to check
1418 * Return the required GTT alignment for an object, taking into account
1419 * potential fence register mapping if needed.
1422 i915_gem_get_gtt_alignment(struct drm_gem_object
*obj
)
1424 struct drm_device
*dev
= obj
->dev
;
1425 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1429 * Minimum alignment is 4k (GTT page size), but might be greater
1430 * if a fence register is needed for the object.
1432 if (INTEL_INFO(dev
)->gen
>= 4 || obj_priv
->tiling_mode
== I915_TILING_NONE
)
1436 * Previous chips need to be aligned to the size of the smallest
1437 * fence register that can contain the object.
1439 if (INTEL_INFO(dev
)->gen
== 3)
1444 for (i
= start
; i
< obj
->size
; i
<<= 1)
1451 * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing
1453 * @data: GTT mapping ioctl data
1454 * @file_priv: GEM object info
1456 * Simply returns the fake offset to userspace so it can mmap it.
1457 * The mmap call will end up in drm_gem_mmap(), which will set things
1458 * up so we can get faults in the handler above.
1460 * The fault handler will take care of binding the object into the GTT
1461 * (since it may have been evicted to make room for something), allocating
1462 * a fence register, and mapping the appropriate aperture address into
1466 i915_gem_mmap_gtt_ioctl(struct drm_device
*dev
, void *data
,
1467 struct drm_file
*file_priv
)
1469 struct drm_i915_gem_mmap_gtt
*args
= data
;
1470 struct drm_gem_object
*obj
;
1471 struct drm_i915_gem_object
*obj_priv
;
1474 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
1477 ret
= i915_mutex_lock_interruptible(dev
);
1481 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
1486 obj_priv
= to_intel_bo(obj
);
1488 if (obj_priv
->madv
!= I915_MADV_WILLNEED
) {
1489 DRM_ERROR("Attempting to mmap a purgeable buffer\n");
1494 if (!obj_priv
->mmap_offset
) {
1495 ret
= i915_gem_create_mmap_offset(obj
);
1500 args
->offset
= obj_priv
->mmap_offset
;
1503 * Pull it into the GTT so that we have a page list (makes the
1504 * initial fault faster and any subsequent flushing possible).
1506 if (!obj_priv
->agp_mem
) {
1507 ret
= i915_gem_object_bind_to_gtt(obj
, 0);
1513 drm_gem_object_unreference(obj
);
1515 mutex_unlock(&dev
->struct_mutex
);
1520 i915_gem_object_put_pages(struct drm_gem_object
*obj
)
1522 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1523 int page_count
= obj
->size
/ PAGE_SIZE
;
1526 BUG_ON(obj_priv
->pages_refcount
== 0);
1527 BUG_ON(obj_priv
->madv
== __I915_MADV_PURGED
);
1529 if (--obj_priv
->pages_refcount
!= 0)
1532 if (obj_priv
->tiling_mode
!= I915_TILING_NONE
)
1533 i915_gem_object_save_bit_17_swizzle(obj
);
1535 if (obj_priv
->madv
== I915_MADV_DONTNEED
)
1536 obj_priv
->dirty
= 0;
1538 for (i
= 0; i
< page_count
; i
++) {
1539 if (obj_priv
->dirty
)
1540 set_page_dirty(obj_priv
->pages
[i
]);
1542 if (obj_priv
->madv
== I915_MADV_WILLNEED
)
1543 mark_page_accessed(obj_priv
->pages
[i
]);
1545 page_cache_release(obj_priv
->pages
[i
]);
1547 obj_priv
->dirty
= 0;
1549 drm_free_large(obj_priv
->pages
);
1550 obj_priv
->pages
= NULL
;
1554 i915_gem_next_request_seqno(struct drm_device
*dev
,
1555 struct intel_ring_buffer
*ring
)
1557 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1559 ring
->outstanding_lazy_request
= true;
1560 return dev_priv
->next_seqno
;
1564 i915_gem_object_move_to_active(struct drm_gem_object
*obj
,
1565 struct intel_ring_buffer
*ring
)
1567 struct drm_device
*dev
= obj
->dev
;
1568 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1569 uint32_t seqno
= i915_gem_next_request_seqno(dev
, ring
);
1571 BUG_ON(ring
== NULL
);
1572 obj_priv
->ring
= ring
;
1574 /* Add a reference if we're newly entering the active list. */
1575 if (!obj_priv
->active
) {
1576 drm_gem_object_reference(obj
);
1577 obj_priv
->active
= 1;
1580 /* Move from whatever list we were on to the tail of execution. */
1581 list_move_tail(&obj_priv
->list
, &ring
->active_list
);
1582 obj_priv
->last_rendering_seqno
= seqno
;
1586 i915_gem_object_move_to_flushing(struct drm_gem_object
*obj
)
1588 struct drm_device
*dev
= obj
->dev
;
1589 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1590 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1592 BUG_ON(!obj_priv
->active
);
1593 list_move_tail(&obj_priv
->list
, &dev_priv
->mm
.flushing_list
);
1594 obj_priv
->last_rendering_seqno
= 0;
1597 /* Immediately discard the backing storage */
1599 i915_gem_object_truncate(struct drm_gem_object
*obj
)
1601 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1602 struct inode
*inode
;
1604 /* Our goal here is to return as much of the memory as
1605 * is possible back to the system as we are called from OOM.
1606 * To do this we must instruct the shmfs to drop all of its
1607 * backing pages, *now*. Here we mirror the actions taken
1608 * when by shmem_delete_inode() to release the backing store.
1610 inode
= obj
->filp
->f_path
.dentry
->d_inode
;
1611 truncate_inode_pages(inode
->i_mapping
, 0);
1612 if (inode
->i_op
->truncate_range
)
1613 inode
->i_op
->truncate_range(inode
, 0, (loff_t
)-1);
1615 obj_priv
->madv
= __I915_MADV_PURGED
;
1619 i915_gem_object_is_purgeable(struct drm_i915_gem_object
*obj_priv
)
1621 return obj_priv
->madv
== I915_MADV_DONTNEED
;
1625 i915_gem_object_move_to_inactive(struct drm_gem_object
*obj
)
1627 struct drm_device
*dev
= obj
->dev
;
1628 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1629 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1631 if (obj_priv
->pin_count
!= 0)
1632 list_move_tail(&obj_priv
->list
, &dev_priv
->mm
.pinned_list
);
1634 list_move_tail(&obj_priv
->list
, &dev_priv
->mm
.inactive_list
);
1636 BUG_ON(!list_empty(&obj_priv
->gpu_write_list
));
1638 obj_priv
->last_rendering_seqno
= 0;
1639 obj_priv
->ring
= NULL
;
1640 if (obj_priv
->active
) {
1641 obj_priv
->active
= 0;
1642 drm_gem_object_unreference(obj
);
1644 WARN_ON(i915_verify_lists(dev
));
1648 i915_gem_process_flushing_list(struct drm_device
*dev
,
1649 uint32_t flush_domains
,
1650 struct intel_ring_buffer
*ring
)
1652 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1653 struct drm_i915_gem_object
*obj_priv
, *next
;
1655 list_for_each_entry_safe(obj_priv
, next
,
1656 &dev_priv
->mm
.gpu_write_list
,
1658 struct drm_gem_object
*obj
= &obj_priv
->base
;
1660 if (obj
->write_domain
& flush_domains
&&
1661 obj_priv
->ring
== ring
) {
1662 uint32_t old_write_domain
= obj
->write_domain
;
1664 obj
->write_domain
= 0;
1665 list_del_init(&obj_priv
->gpu_write_list
);
1666 i915_gem_object_move_to_active(obj
, ring
);
1668 /* update the fence lru list */
1669 if (obj_priv
->fence_reg
!= I915_FENCE_REG_NONE
) {
1670 struct drm_i915_fence_reg
*reg
=
1671 &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
1672 list_move_tail(®
->lru_list
,
1673 &dev_priv
->mm
.fence_list
);
1676 trace_i915_gem_object_change_domain(obj
,
1684 i915_add_request(struct drm_device
*dev
,
1685 struct drm_file
*file
,
1686 struct drm_i915_gem_request
*request
,
1687 struct intel_ring_buffer
*ring
)
1689 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1690 struct drm_i915_file_private
*file_priv
= NULL
;
1695 file_priv
= file
->driver_priv
;
1697 if (request
== NULL
) {
1698 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1699 if (request
== NULL
)
1703 seqno
= ring
->add_request(dev
, ring
, 0);
1704 ring
->outstanding_lazy_request
= false;
1706 request
->seqno
= seqno
;
1707 request
->ring
= ring
;
1708 request
->emitted_jiffies
= jiffies
;
1709 was_empty
= list_empty(&ring
->request_list
);
1710 list_add_tail(&request
->list
, &ring
->request_list
);
1713 spin_lock(&file_priv
->mm
.lock
);
1714 request
->file_priv
= file_priv
;
1715 list_add_tail(&request
->client_list
,
1716 &file_priv
->mm
.request_list
);
1717 spin_unlock(&file_priv
->mm
.lock
);
1720 if (!dev_priv
->mm
.suspended
) {
1721 mod_timer(&dev_priv
->hangcheck_timer
,
1722 jiffies
+ msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD
));
1724 queue_delayed_work(dev_priv
->wq
,
1725 &dev_priv
->mm
.retire_work
, HZ
);
1731 * Command execution barrier
1733 * Ensures that all commands in the ring are finished
1734 * before signalling the CPU
1737 i915_retire_commands(struct drm_device
*dev
, struct intel_ring_buffer
*ring
)
1739 uint32_t flush_domains
= 0;
1741 /* The sampler always gets flushed on i965 (sigh) */
1742 if (INTEL_INFO(dev
)->gen
>= 4)
1743 flush_domains
|= I915_GEM_DOMAIN_SAMPLER
;
1745 ring
->flush(dev
, ring
,
1746 I915_GEM_DOMAIN_COMMAND
, flush_domains
);
1750 i915_gem_request_remove_from_client(struct drm_i915_gem_request
*request
)
1752 struct drm_i915_file_private
*file_priv
= request
->file_priv
;
1757 spin_lock(&file_priv
->mm
.lock
);
1758 list_del(&request
->client_list
);
1759 request
->file_priv
= NULL
;
1760 spin_unlock(&file_priv
->mm
.lock
);
1763 static void i915_gem_reset_ring_lists(struct drm_i915_private
*dev_priv
,
1764 struct intel_ring_buffer
*ring
)
1766 while (!list_empty(&ring
->request_list
)) {
1767 struct drm_i915_gem_request
*request
;
1769 request
= list_first_entry(&ring
->request_list
,
1770 struct drm_i915_gem_request
,
1773 list_del(&request
->list
);
1774 i915_gem_request_remove_from_client(request
);
1778 while (!list_empty(&ring
->active_list
)) {
1779 struct drm_i915_gem_object
*obj_priv
;
1781 obj_priv
= list_first_entry(&ring
->active_list
,
1782 struct drm_i915_gem_object
,
1785 obj_priv
->base
.write_domain
= 0;
1786 list_del_init(&obj_priv
->gpu_write_list
);
1787 i915_gem_object_move_to_inactive(&obj_priv
->base
);
1791 void i915_gem_reset(struct drm_device
*dev
)
1793 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1794 struct drm_i915_gem_object
*obj_priv
;
1797 i915_gem_reset_ring_lists(dev_priv
, &dev_priv
->render_ring
);
1799 i915_gem_reset_ring_lists(dev_priv
, &dev_priv
->bsd_ring
);
1801 /* Remove anything from the flushing lists. The GPU cache is likely
1802 * to be lost on reset along with the data, so simply move the
1803 * lost bo to the inactive list.
1805 while (!list_empty(&dev_priv
->mm
.flushing_list
)) {
1806 obj_priv
= list_first_entry(&dev_priv
->mm
.flushing_list
,
1807 struct drm_i915_gem_object
,
1810 obj_priv
->base
.write_domain
= 0;
1811 list_del_init(&obj_priv
->gpu_write_list
);
1812 i915_gem_object_move_to_inactive(&obj_priv
->base
);
1815 /* Move everything out of the GPU domains to ensure we do any
1816 * necessary invalidation upon reuse.
1818 list_for_each_entry(obj_priv
,
1819 &dev_priv
->mm
.inactive_list
,
1822 obj_priv
->base
.read_domains
&= ~I915_GEM_GPU_DOMAINS
;
1825 /* The fence registers are invalidated so clear them out */
1826 for (i
= 0; i
< 16; i
++) {
1827 struct drm_i915_fence_reg
*reg
;
1829 reg
= &dev_priv
->fence_regs
[i
];
1833 i915_gem_clear_fence_reg(reg
->obj
);
1838 * This function clears the request list as sequence numbers are passed.
1841 i915_gem_retire_requests_ring(struct drm_device
*dev
,
1842 struct intel_ring_buffer
*ring
)
1844 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1847 if (!ring
->status_page
.page_addr
||
1848 list_empty(&ring
->request_list
))
1851 WARN_ON(i915_verify_lists(dev
));
1853 seqno
= ring
->get_seqno(dev
, ring
);
1854 while (!list_empty(&ring
->request_list
)) {
1855 struct drm_i915_gem_request
*request
;
1857 request
= list_first_entry(&ring
->request_list
,
1858 struct drm_i915_gem_request
,
1861 if (!i915_seqno_passed(seqno
, request
->seqno
))
1864 trace_i915_gem_request_retire(dev
, request
->seqno
);
1866 list_del(&request
->list
);
1867 i915_gem_request_remove_from_client(request
);
1871 /* Move any buffers on the active list that are no longer referenced
1872 * by the ringbuffer to the flushing/inactive lists as appropriate.
1874 while (!list_empty(&ring
->active_list
)) {
1875 struct drm_gem_object
*obj
;
1876 struct drm_i915_gem_object
*obj_priv
;
1878 obj_priv
= list_first_entry(&ring
->active_list
,
1879 struct drm_i915_gem_object
,
1882 if (!i915_seqno_passed(seqno
, obj_priv
->last_rendering_seqno
))
1885 obj
= &obj_priv
->base
;
1886 if (obj
->write_domain
!= 0)
1887 i915_gem_object_move_to_flushing(obj
);
1889 i915_gem_object_move_to_inactive(obj
);
1892 if (unlikely (dev_priv
->trace_irq_seqno
&&
1893 i915_seqno_passed(dev_priv
->trace_irq_seqno
, seqno
))) {
1894 ring
->user_irq_put(dev
, ring
);
1895 dev_priv
->trace_irq_seqno
= 0;
1898 WARN_ON(i915_verify_lists(dev
));
1902 i915_gem_retire_requests(struct drm_device
*dev
)
1904 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1906 if (!list_empty(&dev_priv
->mm
.deferred_free_list
)) {
1907 struct drm_i915_gem_object
*obj_priv
, *tmp
;
1909 /* We must be careful that during unbind() we do not
1910 * accidentally infinitely recurse into retire requests.
1912 * retire -> free -> unbind -> wait -> retire_ring
1914 list_for_each_entry_safe(obj_priv
, tmp
,
1915 &dev_priv
->mm
.deferred_free_list
,
1917 i915_gem_free_object_tail(&obj_priv
->base
);
1920 i915_gem_retire_requests_ring(dev
, &dev_priv
->render_ring
);
1922 i915_gem_retire_requests_ring(dev
, &dev_priv
->bsd_ring
);
1926 i915_gem_retire_work_handler(struct work_struct
*work
)
1928 drm_i915_private_t
*dev_priv
;
1929 struct drm_device
*dev
;
1931 dev_priv
= container_of(work
, drm_i915_private_t
,
1932 mm
.retire_work
.work
);
1933 dev
= dev_priv
->dev
;
1935 /* Come back later if the device is busy... */
1936 if (!mutex_trylock(&dev
->struct_mutex
)) {
1937 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, HZ
);
1941 i915_gem_retire_requests(dev
);
1943 if (!dev_priv
->mm
.suspended
&&
1944 (!list_empty(&dev_priv
->render_ring
.request_list
) ||
1946 !list_empty(&dev_priv
->bsd_ring
.request_list
))))
1947 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, HZ
);
1948 mutex_unlock(&dev
->struct_mutex
);
1952 i915_do_wait_request(struct drm_device
*dev
, uint32_t seqno
,
1953 bool interruptible
, struct intel_ring_buffer
*ring
)
1955 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1961 if (atomic_read(&dev_priv
->mm
.wedged
))
1964 if (ring
->outstanding_lazy_request
) {
1965 seqno
= i915_add_request(dev
, NULL
, NULL
, ring
);
1969 BUG_ON(seqno
== dev_priv
->next_seqno
);
1971 if (!i915_seqno_passed(ring
->get_seqno(dev
, ring
), seqno
)) {
1972 if (HAS_PCH_SPLIT(dev
))
1973 ier
= I915_READ(DEIER
) | I915_READ(GTIER
);
1975 ier
= I915_READ(IER
);
1977 DRM_ERROR("something (likely vbetool) disabled "
1978 "interrupts, re-enabling\n");
1979 i915_driver_irq_preinstall(dev
);
1980 i915_driver_irq_postinstall(dev
);
1983 trace_i915_gem_request_wait_begin(dev
, seqno
);
1985 ring
->waiting_gem_seqno
= seqno
;
1986 ring
->user_irq_get(dev
, ring
);
1988 ret
= wait_event_interruptible(ring
->irq_queue
,
1990 ring
->get_seqno(dev
, ring
), seqno
)
1991 || atomic_read(&dev_priv
->mm
.wedged
));
1993 wait_event(ring
->irq_queue
,
1995 ring
->get_seqno(dev
, ring
), seqno
)
1996 || atomic_read(&dev_priv
->mm
.wedged
));
1998 ring
->user_irq_put(dev
, ring
);
1999 ring
->waiting_gem_seqno
= 0;
2001 trace_i915_gem_request_wait_end(dev
, seqno
);
2003 if (atomic_read(&dev_priv
->mm
.wedged
))
2006 if (ret
&& ret
!= -ERESTARTSYS
)
2007 DRM_ERROR("%s returns %d (awaiting %d at %d, next %d)\n",
2008 __func__
, ret
, seqno
, ring
->get_seqno(dev
, ring
),
2009 dev_priv
->next_seqno
);
2011 /* Directly dispatch request retiring. While we have the work queue
2012 * to handle this, the waiter on a request often wants an associated
2013 * buffer to have made it to the inactive list, and we would need
2014 * a separate wait queue to handle that.
2017 i915_gem_retire_requests_ring(dev
, ring
);
2023 * Waits for a sequence number to be signaled, and cleans up the
2024 * request and object lists appropriately for that event.
2027 i915_wait_request(struct drm_device
*dev
, uint32_t seqno
,
2028 struct intel_ring_buffer
*ring
)
2030 return i915_do_wait_request(dev
, seqno
, 1, ring
);
2034 i915_gem_flush_ring(struct drm_device
*dev
,
2035 struct drm_file
*file_priv
,
2036 struct intel_ring_buffer
*ring
,
2037 uint32_t invalidate_domains
,
2038 uint32_t flush_domains
)
2040 ring
->flush(dev
, ring
, invalidate_domains
, flush_domains
);
2041 i915_gem_process_flushing_list(dev
, flush_domains
, ring
);
2045 i915_gem_flush(struct drm_device
*dev
,
2046 struct drm_file
*file_priv
,
2047 uint32_t invalidate_domains
,
2048 uint32_t flush_domains
,
2049 uint32_t flush_rings
)
2051 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2053 if (flush_domains
& I915_GEM_DOMAIN_CPU
)
2054 drm_agp_chipset_flush(dev
);
2056 if ((flush_domains
| invalidate_domains
) & I915_GEM_GPU_DOMAINS
) {
2057 if (flush_rings
& RING_RENDER
)
2058 i915_gem_flush_ring(dev
, file_priv
,
2059 &dev_priv
->render_ring
,
2060 invalidate_domains
, flush_domains
);
2061 if (flush_rings
& RING_BSD
)
2062 i915_gem_flush_ring(dev
, file_priv
,
2063 &dev_priv
->bsd_ring
,
2064 invalidate_domains
, flush_domains
);
2069 * Ensures that all rendering to the object has completed and the object is
2070 * safe to unbind from the GTT or access from the CPU.
2073 i915_gem_object_wait_rendering(struct drm_gem_object
*obj
,
2076 struct drm_device
*dev
= obj
->dev
;
2077 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2080 /* This function only exists to support waiting for existing rendering,
2081 * not for emitting required flushes.
2083 BUG_ON((obj
->write_domain
& I915_GEM_GPU_DOMAINS
) != 0);
2085 /* If there is rendering queued on the buffer being evicted, wait for
2088 if (obj_priv
->active
) {
2089 ret
= i915_do_wait_request(dev
,
2090 obj_priv
->last_rendering_seqno
,
2101 * Unbinds an object from the GTT aperture.
2104 i915_gem_object_unbind(struct drm_gem_object
*obj
)
2106 struct drm_device
*dev
= obj
->dev
;
2107 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2108 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2111 if (obj_priv
->gtt_space
== NULL
)
2114 if (obj_priv
->pin_count
!= 0) {
2115 DRM_ERROR("Attempting to unbind pinned buffer\n");
2119 /* blow away mappings if mapped through GTT */
2120 i915_gem_release_mmap(obj
);
2122 /* Move the object to the CPU domain to ensure that
2123 * any possible CPU writes while it's not in the GTT
2124 * are flushed when we go to remap it. This will
2125 * also ensure that all pending GPU writes are finished
2128 ret
= i915_gem_object_set_to_cpu_domain(obj
, 1);
2129 if (ret
== -ERESTARTSYS
)
2131 /* Continue on if we fail due to EIO, the GPU is hung so we
2132 * should be safe and we need to cleanup or else we might
2133 * cause memory corruption through use-after-free.
2136 i915_gem_clflush_object(obj
);
2137 obj
->read_domains
= obj
->write_domain
= I915_GEM_DOMAIN_CPU
;
2140 /* release the fence reg _after_ flushing */
2141 if (obj_priv
->fence_reg
!= I915_FENCE_REG_NONE
)
2142 i915_gem_clear_fence_reg(obj
);
2144 drm_unbind_agp(obj_priv
->agp_mem
);
2145 drm_free_agp(obj_priv
->agp_mem
, obj
->size
/ PAGE_SIZE
);
2147 i915_gem_object_put_pages(obj
);
2148 BUG_ON(obj_priv
->pages_refcount
);
2150 i915_gem_info_remove_gtt(dev_priv
, obj
->size
);
2151 list_del_init(&obj_priv
->list
);
2153 drm_mm_put_block(obj_priv
->gtt_space
);
2154 obj_priv
->gtt_space
= NULL
;
2156 if (i915_gem_object_is_purgeable(obj_priv
))
2157 i915_gem_object_truncate(obj
);
2159 trace_i915_gem_object_unbind(obj
);
2164 static int i915_ring_idle(struct drm_device
*dev
,
2165 struct intel_ring_buffer
*ring
)
2167 i915_gem_flush_ring(dev
, NULL
, ring
,
2168 I915_GEM_GPU_DOMAINS
, I915_GEM_GPU_DOMAINS
);
2169 return i915_wait_request(dev
,
2170 i915_gem_next_request_seqno(dev
, ring
),
2175 i915_gpu_idle(struct drm_device
*dev
)
2177 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2181 lists_empty
= (list_empty(&dev_priv
->mm
.flushing_list
) &&
2182 list_empty(&dev_priv
->render_ring
.active_list
) &&
2184 list_empty(&dev_priv
->bsd_ring
.active_list
)));
2188 /* Flush everything onto the inactive list. */
2189 ret
= i915_ring_idle(dev
, &dev_priv
->render_ring
);
2194 ret
= i915_ring_idle(dev
, &dev_priv
->bsd_ring
);
2203 i915_gem_object_get_pages(struct drm_gem_object
*obj
,
2206 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2208 struct address_space
*mapping
;
2209 struct inode
*inode
;
2212 BUG_ON(obj_priv
->pages_refcount
2213 == DRM_I915_GEM_OBJECT_MAX_PAGES_REFCOUNT
);
2215 if (obj_priv
->pages_refcount
++ != 0)
2218 /* Get the list of pages out of our struct file. They'll be pinned
2219 * at this point until we release them.
2221 page_count
= obj
->size
/ PAGE_SIZE
;
2222 BUG_ON(obj_priv
->pages
!= NULL
);
2223 obj_priv
->pages
= drm_calloc_large(page_count
, sizeof(struct page
*));
2224 if (obj_priv
->pages
== NULL
) {
2225 obj_priv
->pages_refcount
--;
2229 inode
= obj
->filp
->f_path
.dentry
->d_inode
;
2230 mapping
= inode
->i_mapping
;
2231 for (i
= 0; i
< page_count
; i
++) {
2232 page
= read_cache_page_gfp(mapping
, i
,
2240 obj_priv
->pages
[i
] = page
;
2243 if (obj_priv
->tiling_mode
!= I915_TILING_NONE
)
2244 i915_gem_object_do_bit_17_swizzle(obj
);
2250 page_cache_release(obj_priv
->pages
[i
]);
2252 drm_free_large(obj_priv
->pages
);
2253 obj_priv
->pages
= NULL
;
2254 obj_priv
->pages_refcount
--;
2255 return PTR_ERR(page
);
2258 static void sandybridge_write_fence_reg(struct drm_i915_fence_reg
*reg
)
2260 struct drm_gem_object
*obj
= reg
->obj
;
2261 struct drm_device
*dev
= obj
->dev
;
2262 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2263 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2264 int regnum
= obj_priv
->fence_reg
;
2267 val
= (uint64_t)((obj_priv
->gtt_offset
+ obj
->size
- 4096) &
2269 val
|= obj_priv
->gtt_offset
& 0xfffff000;
2270 val
|= (uint64_t)((obj_priv
->stride
/ 128) - 1) <<
2271 SANDYBRIDGE_FENCE_PITCH_SHIFT
;
2273 if (obj_priv
->tiling_mode
== I915_TILING_Y
)
2274 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2275 val
|= I965_FENCE_REG_VALID
;
2277 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0
+ (regnum
* 8), val
);
2280 static void i965_write_fence_reg(struct drm_i915_fence_reg
*reg
)
2282 struct drm_gem_object
*obj
= reg
->obj
;
2283 struct drm_device
*dev
= obj
->dev
;
2284 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2285 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2286 int regnum
= obj_priv
->fence_reg
;
2289 val
= (uint64_t)((obj_priv
->gtt_offset
+ obj
->size
- 4096) &
2291 val
|= obj_priv
->gtt_offset
& 0xfffff000;
2292 val
|= ((obj_priv
->stride
/ 128) - 1) << I965_FENCE_PITCH_SHIFT
;
2293 if (obj_priv
->tiling_mode
== I915_TILING_Y
)
2294 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2295 val
|= I965_FENCE_REG_VALID
;
2297 I915_WRITE64(FENCE_REG_965_0
+ (regnum
* 8), val
);
2300 static void i915_write_fence_reg(struct drm_i915_fence_reg
*reg
)
2302 struct drm_gem_object
*obj
= reg
->obj
;
2303 struct drm_device
*dev
= obj
->dev
;
2304 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2305 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2306 int regnum
= obj_priv
->fence_reg
;
2308 uint32_t fence_reg
, val
;
2311 if ((obj_priv
->gtt_offset
& ~I915_FENCE_START_MASK
) ||
2312 (obj_priv
->gtt_offset
& (obj
->size
- 1))) {
2313 WARN(1, "%s: object 0x%08x not 1M or size (0x%zx) aligned\n",
2314 __func__
, obj_priv
->gtt_offset
, obj
->size
);
2318 if (obj_priv
->tiling_mode
== I915_TILING_Y
&&
2319 HAS_128_BYTE_Y_TILING(dev
))
2324 /* Note: pitch better be a power of two tile widths */
2325 pitch_val
= obj_priv
->stride
/ tile_width
;
2326 pitch_val
= ffs(pitch_val
) - 1;
2328 if (obj_priv
->tiling_mode
== I915_TILING_Y
&&
2329 HAS_128_BYTE_Y_TILING(dev
))
2330 WARN_ON(pitch_val
> I830_FENCE_MAX_PITCH_VAL
);
2332 WARN_ON(pitch_val
> I915_FENCE_MAX_PITCH_VAL
);
2334 val
= obj_priv
->gtt_offset
;
2335 if (obj_priv
->tiling_mode
== I915_TILING_Y
)
2336 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2337 val
|= I915_FENCE_SIZE_BITS(obj
->size
);
2338 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2339 val
|= I830_FENCE_REG_VALID
;
2342 fence_reg
= FENCE_REG_830_0
+ (regnum
* 4);
2344 fence_reg
= FENCE_REG_945_8
+ ((regnum
- 8) * 4);
2345 I915_WRITE(fence_reg
, val
);
2348 static void i830_write_fence_reg(struct drm_i915_fence_reg
*reg
)
2350 struct drm_gem_object
*obj
= reg
->obj
;
2351 struct drm_device
*dev
= obj
->dev
;
2352 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2353 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2354 int regnum
= obj_priv
->fence_reg
;
2357 uint32_t fence_size_bits
;
2359 if ((obj_priv
->gtt_offset
& ~I830_FENCE_START_MASK
) ||
2360 (obj_priv
->gtt_offset
& (obj
->size
- 1))) {
2361 WARN(1, "%s: object 0x%08x not 512K or size aligned\n",
2362 __func__
, obj_priv
->gtt_offset
);
2366 pitch_val
= obj_priv
->stride
/ 128;
2367 pitch_val
= ffs(pitch_val
) - 1;
2368 WARN_ON(pitch_val
> I830_FENCE_MAX_PITCH_VAL
);
2370 val
= obj_priv
->gtt_offset
;
2371 if (obj_priv
->tiling_mode
== I915_TILING_Y
)
2372 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2373 fence_size_bits
= I830_FENCE_SIZE_BITS(obj
->size
);
2374 WARN_ON(fence_size_bits
& ~0x00000f00);
2375 val
|= fence_size_bits
;
2376 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2377 val
|= I830_FENCE_REG_VALID
;
2379 I915_WRITE(FENCE_REG_830_0
+ (regnum
* 4), val
);
2382 static int i915_find_fence_reg(struct drm_device
*dev
,
2385 struct drm_i915_fence_reg
*reg
= NULL
;
2386 struct drm_i915_gem_object
*obj_priv
= NULL
;
2387 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2388 struct drm_gem_object
*obj
= NULL
;
2391 /* First try to find a free reg */
2393 for (i
= dev_priv
->fence_reg_start
; i
< dev_priv
->num_fence_regs
; i
++) {
2394 reg
= &dev_priv
->fence_regs
[i
];
2398 obj_priv
= to_intel_bo(reg
->obj
);
2399 if (!obj_priv
->pin_count
)
2406 /* None available, try to steal one or wait for a user to finish */
2407 i
= I915_FENCE_REG_NONE
;
2408 list_for_each_entry(reg
, &dev_priv
->mm
.fence_list
,
2411 obj_priv
= to_intel_bo(obj
);
2413 if (obj_priv
->pin_count
)
2417 i
= obj_priv
->fence_reg
;
2421 BUG_ON(i
== I915_FENCE_REG_NONE
);
2423 /* We only have a reference on obj from the active list. put_fence_reg
2424 * might drop that one, causing a use-after-free in it. So hold a
2425 * private reference to obj like the other callers of put_fence_reg
2426 * (set_tiling ioctl) do. */
2427 drm_gem_object_reference(obj
);
2428 ret
= i915_gem_object_put_fence_reg(obj
, interruptible
);
2429 drm_gem_object_unreference(obj
);
2437 * i915_gem_object_get_fence_reg - set up a fence reg for an object
2438 * @obj: object to map through a fence reg
2440 * When mapping objects through the GTT, userspace wants to be able to write
2441 * to them without having to worry about swizzling if the object is tiled.
2443 * This function walks the fence regs looking for a free one for @obj,
2444 * stealing one if it can't find any.
2446 * It then sets up the reg based on the object's properties: address, pitch
2447 * and tiling format.
2450 i915_gem_object_get_fence_reg(struct drm_gem_object
*obj
,
2453 struct drm_device
*dev
= obj
->dev
;
2454 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2455 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2456 struct drm_i915_fence_reg
*reg
= NULL
;
2459 /* Just update our place in the LRU if our fence is getting used. */
2460 if (obj_priv
->fence_reg
!= I915_FENCE_REG_NONE
) {
2461 reg
= &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
2462 list_move_tail(®
->lru_list
, &dev_priv
->mm
.fence_list
);
2466 switch (obj_priv
->tiling_mode
) {
2467 case I915_TILING_NONE
:
2468 WARN(1, "allocating a fence for non-tiled object?\n");
2471 if (!obj_priv
->stride
)
2473 WARN((obj_priv
->stride
& (512 - 1)),
2474 "object 0x%08x is X tiled but has non-512B pitch\n",
2475 obj_priv
->gtt_offset
);
2478 if (!obj_priv
->stride
)
2480 WARN((obj_priv
->stride
& (128 - 1)),
2481 "object 0x%08x is Y tiled but has non-128B pitch\n",
2482 obj_priv
->gtt_offset
);
2486 ret
= i915_find_fence_reg(dev
, interruptible
);
2490 obj_priv
->fence_reg
= ret
;
2491 reg
= &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
2492 list_add_tail(®
->lru_list
, &dev_priv
->mm
.fence_list
);
2496 switch (INTEL_INFO(dev
)->gen
) {
2498 sandybridge_write_fence_reg(reg
);
2502 i965_write_fence_reg(reg
);
2505 i915_write_fence_reg(reg
);
2508 i830_write_fence_reg(reg
);
2512 trace_i915_gem_object_get_fence(obj
, obj_priv
->fence_reg
,
2513 obj_priv
->tiling_mode
);
2519 * i915_gem_clear_fence_reg - clear out fence register info
2520 * @obj: object to clear
2522 * Zeroes out the fence register itself and clears out the associated
2523 * data structures in dev_priv and obj_priv.
2526 i915_gem_clear_fence_reg(struct drm_gem_object
*obj
)
2528 struct drm_device
*dev
= obj
->dev
;
2529 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2530 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2531 struct drm_i915_fence_reg
*reg
=
2532 &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
2535 switch (INTEL_INFO(dev
)->gen
) {
2537 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0
+
2538 (obj_priv
->fence_reg
* 8), 0);
2542 I915_WRITE64(FENCE_REG_965_0
+ (obj_priv
->fence_reg
* 8), 0);
2545 if (obj_priv
->fence_reg
>= 8)
2546 fence_reg
= FENCE_REG_945_8
+ (obj_priv
->fence_reg
- 8) * 4;
2549 fence_reg
= FENCE_REG_830_0
+ obj_priv
->fence_reg
* 4;
2551 I915_WRITE(fence_reg
, 0);
2556 obj_priv
->fence_reg
= I915_FENCE_REG_NONE
;
2557 list_del_init(®
->lru_list
);
2561 * i915_gem_object_put_fence_reg - waits on outstanding fenced access
2562 * to the buffer to finish, and then resets the fence register.
2563 * @obj: tiled object holding a fence register.
2564 * @bool: whether the wait upon the fence is interruptible
2566 * Zeroes out the fence register itself and clears out the associated
2567 * data structures in dev_priv and obj_priv.
2570 i915_gem_object_put_fence_reg(struct drm_gem_object
*obj
,
2573 struct drm_device
*dev
= obj
->dev
;
2574 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2575 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2576 struct drm_i915_fence_reg
*reg
;
2578 if (obj_priv
->fence_reg
== I915_FENCE_REG_NONE
)
2581 /* If we've changed tiling, GTT-mappings of the object
2582 * need to re-fault to ensure that the correct fence register
2583 * setup is in place.
2585 i915_gem_release_mmap(obj
);
2587 /* On the i915, GPU access to tiled buffers is via a fence,
2588 * therefore we must wait for any outstanding access to complete
2589 * before clearing the fence.
2591 reg
= &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
2595 ret
= i915_gem_object_flush_gpu_write_domain(obj
, true);
2599 ret
= i915_gem_object_wait_rendering(obj
, interruptible
);
2606 i915_gem_object_flush_gtt_write_domain(obj
);
2607 i915_gem_clear_fence_reg(obj
);
2613 * Finds free space in the GTT aperture and binds the object there.
2616 i915_gem_object_bind_to_gtt(struct drm_gem_object
*obj
, unsigned alignment
)
2618 struct drm_device
*dev
= obj
->dev
;
2619 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2620 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2621 struct drm_mm_node
*free_space
;
2622 gfp_t gfpmask
= __GFP_NORETRY
| __GFP_NOWARN
;
2625 if (obj_priv
->madv
!= I915_MADV_WILLNEED
) {
2626 DRM_ERROR("Attempting to bind a purgeable object\n");
2631 alignment
= i915_gem_get_gtt_alignment(obj
);
2632 if (alignment
& (i915_gem_get_gtt_alignment(obj
) - 1)) {
2633 DRM_ERROR("Invalid object alignment requested %u\n", alignment
);
2637 /* If the object is bigger than the entire aperture, reject it early
2638 * before evicting everything in a vain attempt to find space.
2640 if (obj
->size
> dev_priv
->mm
.gtt_total
) {
2641 DRM_ERROR("Attempting to bind an object larger than the aperture\n");
2646 free_space
= drm_mm_search_free(&dev_priv
->mm
.gtt_space
,
2647 obj
->size
, alignment
, 0);
2648 if (free_space
!= NULL
) {
2649 obj_priv
->gtt_space
= drm_mm_get_block(free_space
, obj
->size
,
2651 if (obj_priv
->gtt_space
!= NULL
)
2652 obj_priv
->gtt_offset
= obj_priv
->gtt_space
->start
;
2654 if (obj_priv
->gtt_space
== NULL
) {
2655 /* If the gtt is empty and we're still having trouble
2656 * fitting our object in, we're out of memory.
2658 ret
= i915_gem_evict_something(dev
, obj
->size
, alignment
);
2665 ret
= i915_gem_object_get_pages(obj
, gfpmask
);
2667 drm_mm_put_block(obj_priv
->gtt_space
);
2668 obj_priv
->gtt_space
= NULL
;
2670 if (ret
== -ENOMEM
) {
2671 /* first try to clear up some space from the GTT */
2672 ret
= i915_gem_evict_something(dev
, obj
->size
,
2675 /* now try to shrink everyone else */
2690 /* Create an AGP memory structure pointing at our pages, and bind it
2693 obj_priv
->agp_mem
= drm_agp_bind_pages(dev
,
2695 obj
->size
>> PAGE_SHIFT
,
2696 obj_priv
->gtt_offset
,
2697 obj_priv
->agp_type
);
2698 if (obj_priv
->agp_mem
== NULL
) {
2699 i915_gem_object_put_pages(obj
);
2700 drm_mm_put_block(obj_priv
->gtt_space
);
2701 obj_priv
->gtt_space
= NULL
;
2703 ret
= i915_gem_evict_something(dev
, obj
->size
, alignment
);
2710 /* keep track of bounds object by adding it to the inactive list */
2711 list_add_tail(&obj_priv
->list
, &dev_priv
->mm
.inactive_list
);
2712 i915_gem_info_add_gtt(dev_priv
, obj
->size
);
2714 /* Assert that the object is not currently in any GPU domain. As it
2715 * wasn't in the GTT, there shouldn't be any way it could have been in
2718 BUG_ON(obj
->read_domains
& I915_GEM_GPU_DOMAINS
);
2719 BUG_ON(obj
->write_domain
& I915_GEM_GPU_DOMAINS
);
2721 trace_i915_gem_object_bind(obj
, obj_priv
->gtt_offset
);
2727 i915_gem_clflush_object(struct drm_gem_object
*obj
)
2729 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2731 /* If we don't have a page list set up, then we're not pinned
2732 * to GPU, and we can ignore the cache flush because it'll happen
2733 * again at bind time.
2735 if (obj_priv
->pages
== NULL
)
2738 trace_i915_gem_object_clflush(obj
);
2740 drm_clflush_pages(obj_priv
->pages
, obj
->size
/ PAGE_SIZE
);
2743 /** Flushes any GPU write domain for the object if it's dirty. */
2745 i915_gem_object_flush_gpu_write_domain(struct drm_gem_object
*obj
,
2748 struct drm_device
*dev
= obj
->dev
;
2749 uint32_t old_write_domain
;
2751 if ((obj
->write_domain
& I915_GEM_GPU_DOMAINS
) == 0)
2754 /* Queue the GPU write cache flushing we need. */
2755 old_write_domain
= obj
->write_domain
;
2756 i915_gem_flush_ring(dev
, NULL
,
2757 to_intel_bo(obj
)->ring
,
2758 0, obj
->write_domain
);
2759 BUG_ON(obj
->write_domain
);
2761 trace_i915_gem_object_change_domain(obj
,
2768 return i915_gem_object_wait_rendering(obj
, true);
2771 /** Flushes the GTT write domain for the object if it's dirty. */
2773 i915_gem_object_flush_gtt_write_domain(struct drm_gem_object
*obj
)
2775 uint32_t old_write_domain
;
2777 if (obj
->write_domain
!= I915_GEM_DOMAIN_GTT
)
2780 /* No actual flushing is required for the GTT write domain. Writes
2781 * to it immediately go to main memory as far as we know, so there's
2782 * no chipset flush. It also doesn't land in render cache.
2784 old_write_domain
= obj
->write_domain
;
2785 obj
->write_domain
= 0;
2787 trace_i915_gem_object_change_domain(obj
,
2792 /** Flushes the CPU write domain for the object if it's dirty. */
2794 i915_gem_object_flush_cpu_write_domain(struct drm_gem_object
*obj
)
2796 struct drm_device
*dev
= obj
->dev
;
2797 uint32_t old_write_domain
;
2799 if (obj
->write_domain
!= I915_GEM_DOMAIN_CPU
)
2802 i915_gem_clflush_object(obj
);
2803 drm_agp_chipset_flush(dev
);
2804 old_write_domain
= obj
->write_domain
;
2805 obj
->write_domain
= 0;
2807 trace_i915_gem_object_change_domain(obj
,
2813 * Moves a single object to the GTT read, and possibly write domain.
2815 * This function returns when the move is complete, including waiting on
2819 i915_gem_object_set_to_gtt_domain(struct drm_gem_object
*obj
, int write
)
2821 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2822 uint32_t old_write_domain
, old_read_domains
;
2825 /* Not valid to be called on unbound objects. */
2826 if (obj_priv
->gtt_space
== NULL
)
2829 ret
= i915_gem_object_flush_gpu_write_domain(obj
, false);
2833 i915_gem_object_flush_cpu_write_domain(obj
);
2836 ret
= i915_gem_object_wait_rendering(obj
, true);
2841 old_write_domain
= obj
->write_domain
;
2842 old_read_domains
= obj
->read_domains
;
2844 /* It should now be out of any other write domains, and we can update
2845 * the domain values for our changes.
2847 BUG_ON((obj
->write_domain
& ~I915_GEM_DOMAIN_GTT
) != 0);
2848 obj
->read_domains
|= I915_GEM_DOMAIN_GTT
;
2850 obj
->read_domains
= I915_GEM_DOMAIN_GTT
;
2851 obj
->write_domain
= I915_GEM_DOMAIN_GTT
;
2852 obj_priv
->dirty
= 1;
2855 trace_i915_gem_object_change_domain(obj
,
2863 * Prepare buffer for display plane. Use uninterruptible for possible flush
2864 * wait, as in modesetting process we're not supposed to be interrupted.
2867 i915_gem_object_set_to_display_plane(struct drm_gem_object
*obj
,
2870 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2871 uint32_t old_read_domains
;
2874 /* Not valid to be called on unbound objects. */
2875 if (obj_priv
->gtt_space
== NULL
)
2878 ret
= i915_gem_object_flush_gpu_write_domain(obj
, true);
2882 /* Currently, we are always called from an non-interruptible context. */
2884 ret
= i915_gem_object_wait_rendering(obj
, false);
2889 i915_gem_object_flush_cpu_write_domain(obj
);
2891 old_read_domains
= obj
->read_domains
;
2892 obj
->read_domains
|= I915_GEM_DOMAIN_GTT
;
2894 trace_i915_gem_object_change_domain(obj
,
2902 * Moves a single object to the CPU read, and possibly write domain.
2904 * This function returns when the move is complete, including waiting on
2908 i915_gem_object_set_to_cpu_domain(struct drm_gem_object
*obj
, int write
)
2910 uint32_t old_write_domain
, old_read_domains
;
2913 ret
= i915_gem_object_flush_gpu_write_domain(obj
, false);
2917 i915_gem_object_flush_gtt_write_domain(obj
);
2919 /* If we have a partially-valid cache of the object in the CPU,
2920 * finish invalidating it and free the per-page flags.
2922 i915_gem_object_set_to_full_cpu_read_domain(obj
);
2925 ret
= i915_gem_object_wait_rendering(obj
, true);
2930 old_write_domain
= obj
->write_domain
;
2931 old_read_domains
= obj
->read_domains
;
2933 /* Flush the CPU cache if it's still invalid. */
2934 if ((obj
->read_domains
& I915_GEM_DOMAIN_CPU
) == 0) {
2935 i915_gem_clflush_object(obj
);
2937 obj
->read_domains
|= I915_GEM_DOMAIN_CPU
;
2940 /* It should now be out of any other write domains, and we can update
2941 * the domain values for our changes.
2943 BUG_ON((obj
->write_domain
& ~I915_GEM_DOMAIN_CPU
) != 0);
2945 /* If we're writing through the CPU, then the GPU read domains will
2946 * need to be invalidated at next use.
2949 obj
->read_domains
= I915_GEM_DOMAIN_CPU
;
2950 obj
->write_domain
= I915_GEM_DOMAIN_CPU
;
2953 trace_i915_gem_object_change_domain(obj
,
2961 * Set the next domain for the specified object. This
2962 * may not actually perform the necessary flushing/invaliding though,
2963 * as that may want to be batched with other set_domain operations
2965 * This is (we hope) the only really tricky part of gem. The goal
2966 * is fairly simple -- track which caches hold bits of the object
2967 * and make sure they remain coherent. A few concrete examples may
2968 * help to explain how it works. For shorthand, we use the notation
2969 * (read_domains, write_domain), e.g. (CPU, CPU) to indicate the
2970 * a pair of read and write domain masks.
2972 * Case 1: the batch buffer
2978 * 5. Unmapped from GTT
2981 * Let's take these a step at a time
2984 * Pages allocated from the kernel may still have
2985 * cache contents, so we set them to (CPU, CPU) always.
2986 * 2. Written by CPU (using pwrite)
2987 * The pwrite function calls set_domain (CPU, CPU) and
2988 * this function does nothing (as nothing changes)
2990 * This function asserts that the object is not
2991 * currently in any GPU-based read or write domains
2993 * i915_gem_execbuffer calls set_domain (COMMAND, 0).
2994 * As write_domain is zero, this function adds in the
2995 * current read domains (CPU+COMMAND, 0).
2996 * flush_domains is set to CPU.
2997 * invalidate_domains is set to COMMAND
2998 * clflush is run to get data out of the CPU caches
2999 * then i915_dev_set_domain calls i915_gem_flush to
3000 * emit an MI_FLUSH and drm_agp_chipset_flush
3001 * 5. Unmapped from GTT
3002 * i915_gem_object_unbind calls set_domain (CPU, CPU)
3003 * flush_domains and invalidate_domains end up both zero
3004 * so no flushing/invalidating happens
3008 * Case 2: The shared render buffer
3012 * 3. Read/written by GPU
3013 * 4. set_domain to (CPU,CPU)
3014 * 5. Read/written by CPU
3015 * 6. Read/written by GPU
3018 * Same as last example, (CPU, CPU)
3020 * Nothing changes (assertions find that it is not in the GPU)
3021 * 3. Read/written by GPU
3022 * execbuffer calls set_domain (RENDER, RENDER)
3023 * flush_domains gets CPU
3024 * invalidate_domains gets GPU
3026 * MI_FLUSH and drm_agp_chipset_flush
3027 * 4. set_domain (CPU, CPU)
3028 * flush_domains gets GPU
3029 * invalidate_domains gets CPU
3030 * wait_rendering (obj) to make sure all drawing is complete.
3031 * This will include an MI_FLUSH to get the data from GPU
3033 * clflush (obj) to invalidate the CPU cache
3034 * Another MI_FLUSH in i915_gem_flush (eliminate this somehow?)
3035 * 5. Read/written by CPU
3036 * cache lines are loaded and dirtied
3037 * 6. Read written by GPU
3038 * Same as last GPU access
3040 * Case 3: The constant buffer
3045 * 4. Updated (written) by CPU again
3054 * flush_domains = CPU
3055 * invalidate_domains = RENDER
3058 * drm_agp_chipset_flush
3059 * 4. Updated (written) by CPU again
3061 * flush_domains = 0 (no previous write domain)
3062 * invalidate_domains = 0 (no new read domains)
3065 * flush_domains = CPU
3066 * invalidate_domains = RENDER
3069 * drm_agp_chipset_flush
3072 i915_gem_object_set_to_gpu_domain(struct drm_gem_object
*obj
)
3074 struct drm_device
*dev
= obj
->dev
;
3075 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3076 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
3077 uint32_t invalidate_domains
= 0;
3078 uint32_t flush_domains
= 0;
3079 uint32_t old_read_domains
;
3081 intel_mark_busy(dev
, obj
);
3084 * If the object isn't moving to a new write domain,
3085 * let the object stay in multiple read domains
3087 if (obj
->pending_write_domain
== 0)
3088 obj
->pending_read_domains
|= obj
->read_domains
;
3090 obj_priv
->dirty
= 1;
3093 * Flush the current write domain if
3094 * the new read domains don't match. Invalidate
3095 * any read domains which differ from the old
3098 if (obj
->write_domain
&&
3099 obj
->write_domain
!= obj
->pending_read_domains
) {
3100 flush_domains
|= obj
->write_domain
;
3101 invalidate_domains
|=
3102 obj
->pending_read_domains
& ~obj
->write_domain
;
3105 * Invalidate any read caches which may have
3106 * stale data. That is, any new read domains.
3108 invalidate_domains
|= obj
->pending_read_domains
& ~obj
->read_domains
;
3109 if ((flush_domains
| invalidate_domains
) & I915_GEM_DOMAIN_CPU
)
3110 i915_gem_clflush_object(obj
);
3112 old_read_domains
= obj
->read_domains
;
3114 /* The actual obj->write_domain will be updated with
3115 * pending_write_domain after we emit the accumulated flush for all
3116 * of our domain changes in execbuffers (which clears objects'
3117 * write_domains). So if we have a current write domain that we
3118 * aren't changing, set pending_write_domain to that.
3120 if (flush_domains
== 0 && obj
->pending_write_domain
== 0)
3121 obj
->pending_write_domain
= obj
->write_domain
;
3122 obj
->read_domains
= obj
->pending_read_domains
;
3124 dev
->invalidate_domains
|= invalidate_domains
;
3125 dev
->flush_domains
|= flush_domains
;
3127 dev_priv
->mm
.flush_rings
|= obj_priv
->ring
->id
;
3129 trace_i915_gem_object_change_domain(obj
,
3135 * Moves the object from a partially CPU read to a full one.
3137 * Note that this only resolves i915_gem_object_set_cpu_read_domain_range(),
3138 * and doesn't handle transitioning from !(read_domains & I915_GEM_DOMAIN_CPU).
3141 i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object
*obj
)
3143 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
3145 if (!obj_priv
->page_cpu_valid
)
3148 /* If we're partially in the CPU read domain, finish moving it in.
3150 if (obj
->read_domains
& I915_GEM_DOMAIN_CPU
) {
3153 for (i
= 0; i
<= (obj
->size
- 1) / PAGE_SIZE
; i
++) {
3154 if (obj_priv
->page_cpu_valid
[i
])
3156 drm_clflush_pages(obj_priv
->pages
+ i
, 1);
3160 /* Free the page_cpu_valid mappings which are now stale, whether
3161 * or not we've got I915_GEM_DOMAIN_CPU.
3163 kfree(obj_priv
->page_cpu_valid
);
3164 obj_priv
->page_cpu_valid
= NULL
;
3168 * Set the CPU read domain on a range of the object.
3170 * The object ends up with I915_GEM_DOMAIN_CPU in its read flags although it's
3171 * not entirely valid. The page_cpu_valid member of the object flags which
3172 * pages have been flushed, and will be respected by
3173 * i915_gem_object_set_to_cpu_domain() if it's called on to get a valid mapping
3174 * of the whole object.
3176 * This function returns when the move is complete, including waiting on
3180 i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object
*obj
,
3181 uint64_t offset
, uint64_t size
)
3183 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
3184 uint32_t old_read_domains
;
3187 if (offset
== 0 && size
== obj
->size
)
3188 return i915_gem_object_set_to_cpu_domain(obj
, 0);
3190 ret
= i915_gem_object_flush_gpu_write_domain(obj
, false);
3193 i915_gem_object_flush_gtt_write_domain(obj
);
3195 /* If we're already fully in the CPU read domain, we're done. */
3196 if (obj_priv
->page_cpu_valid
== NULL
&&
3197 (obj
->read_domains
& I915_GEM_DOMAIN_CPU
) != 0)
3200 /* Otherwise, create/clear the per-page CPU read domain flag if we're
3201 * newly adding I915_GEM_DOMAIN_CPU
3203 if (obj_priv
->page_cpu_valid
== NULL
) {
3204 obj_priv
->page_cpu_valid
= kzalloc(obj
->size
/ PAGE_SIZE
,
3206 if (obj_priv
->page_cpu_valid
== NULL
)
3208 } else if ((obj
->read_domains
& I915_GEM_DOMAIN_CPU
) == 0)
3209 memset(obj_priv
->page_cpu_valid
, 0, obj
->size
/ PAGE_SIZE
);
3211 /* Flush the cache on any pages that are still invalid from the CPU's
3214 for (i
= offset
/ PAGE_SIZE
; i
<= (offset
+ size
- 1) / PAGE_SIZE
;
3216 if (obj_priv
->page_cpu_valid
[i
])
3219 drm_clflush_pages(obj_priv
->pages
+ i
, 1);
3221 obj_priv
->page_cpu_valid
[i
] = 1;
3224 /* It should now be out of any other write domains, and we can update
3225 * the domain values for our changes.
3227 BUG_ON((obj
->write_domain
& ~I915_GEM_DOMAIN_CPU
) != 0);
3229 old_read_domains
= obj
->read_domains
;
3230 obj
->read_domains
|= I915_GEM_DOMAIN_CPU
;
3232 trace_i915_gem_object_change_domain(obj
,
3240 * Pin an object to the GTT and evaluate the relocations landing in it.
3243 i915_gem_object_pin_and_relocate(struct drm_gem_object
*obj
,
3244 struct drm_file
*file_priv
,
3245 struct drm_i915_gem_exec_object2
*entry
)
3247 struct drm_device
*dev
= obj
->dev
;
3248 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3249 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
3250 struct drm_i915_gem_relocation_entry __user
*user_relocs
;
3254 need_fence
= entry
->flags
& EXEC_OBJECT_NEEDS_FENCE
&&
3255 obj_priv
->tiling_mode
!= I915_TILING_NONE
;
3257 /* Check fence reg constraints and rebind if necessary */
3259 !i915_gem_object_fence_offset_ok(obj
,
3260 obj_priv
->tiling_mode
)) {
3261 ret
= i915_gem_object_unbind(obj
);
3266 /* Choose the GTT offset for our buffer and put it there. */
3267 ret
= i915_gem_object_pin(obj
, (uint32_t) entry
->alignment
);
3272 * Pre-965 chips need a fence register set up in order to
3273 * properly handle blits to/from tiled surfaces.
3276 ret
= i915_gem_object_get_fence_reg(obj
, true);
3278 i915_gem_object_unpin(obj
);
3282 dev_priv
->fence_regs
[obj_priv
->fence_reg
].gpu
= true;
3285 entry
->offset
= obj_priv
->gtt_offset
;
3287 /* Apply the relocations, using the GTT aperture to avoid cache
3288 * flushing requirements.
3290 user_relocs
= (void __user
*)(uintptr_t)entry
->relocs_ptr
;
3291 for (i
= 0; i
< entry
->relocation_count
; i
++) {
3292 struct drm_i915_gem_relocation_entry reloc
;
3293 struct drm_gem_object
*target_obj
;
3294 struct drm_i915_gem_object
*target_obj_priv
;
3296 ret
= __copy_from_user_inatomic(&reloc
,
3300 i915_gem_object_unpin(obj
);
3304 target_obj
= drm_gem_object_lookup(obj
->dev
, file_priv
,
3305 reloc
.target_handle
);
3306 if (target_obj
== NULL
) {
3307 i915_gem_object_unpin(obj
);
3310 target_obj_priv
= to_intel_bo(target_obj
);
3313 DRM_INFO("%s: obj %p offset %08x target %d "
3314 "read %08x write %08x gtt %08x "
3315 "presumed %08x delta %08x\n",
3319 (int) reloc
.target_handle
,
3320 (int) reloc
.read_domains
,
3321 (int) reloc
.write_domain
,
3322 (int) target_obj_priv
->gtt_offset
,
3323 (int) reloc
.presumed_offset
,
3327 /* The target buffer should have appeared before us in the
3328 * exec_object list, so it should have a GTT space bound by now.
3330 if (target_obj_priv
->gtt_space
== NULL
) {
3331 DRM_ERROR("No GTT space found for object %d\n",
3332 reloc
.target_handle
);
3333 drm_gem_object_unreference(target_obj
);
3334 i915_gem_object_unpin(obj
);
3338 /* Validate that the target is in a valid r/w GPU domain */
3339 if (reloc
.write_domain
& (reloc
.write_domain
- 1)) {
3340 DRM_ERROR("reloc with multiple write domains: "
3341 "obj %p target %d offset %d "
3342 "read %08x write %08x",
3343 obj
, reloc
.target_handle
,
3346 reloc
.write_domain
);
3347 drm_gem_object_unreference(target_obj
);
3348 i915_gem_object_unpin(obj
);
3351 if (reloc
.write_domain
& I915_GEM_DOMAIN_CPU
||
3352 reloc
.read_domains
& I915_GEM_DOMAIN_CPU
) {
3353 DRM_ERROR("reloc with read/write CPU domains: "
3354 "obj %p target %d offset %d "
3355 "read %08x write %08x",
3356 obj
, reloc
.target_handle
,
3359 reloc
.write_domain
);
3360 drm_gem_object_unreference(target_obj
);
3361 i915_gem_object_unpin(obj
);
3364 if (reloc
.write_domain
&& target_obj
->pending_write_domain
&&
3365 reloc
.write_domain
!= target_obj
->pending_write_domain
) {
3366 DRM_ERROR("Write domain conflict: "
3367 "obj %p target %d offset %d "
3368 "new %08x old %08x\n",
3369 obj
, reloc
.target_handle
,
3372 target_obj
->pending_write_domain
);
3373 drm_gem_object_unreference(target_obj
);
3374 i915_gem_object_unpin(obj
);
3378 target_obj
->pending_read_domains
|= reloc
.read_domains
;
3379 target_obj
->pending_write_domain
|= reloc
.write_domain
;
3381 /* If the relocation already has the right value in it, no
3382 * more work needs to be done.
3384 if (target_obj_priv
->gtt_offset
== reloc
.presumed_offset
) {
3385 drm_gem_object_unreference(target_obj
);
3389 /* Check that the relocation address is valid... */
3390 if (reloc
.offset
> obj
->size
- 4) {
3391 DRM_ERROR("Relocation beyond object bounds: "
3392 "obj %p target %d offset %d size %d.\n",
3393 obj
, reloc
.target_handle
,
3394 (int) reloc
.offset
, (int) obj
->size
);
3395 drm_gem_object_unreference(target_obj
);
3396 i915_gem_object_unpin(obj
);
3399 if (reloc
.offset
& 3) {
3400 DRM_ERROR("Relocation not 4-byte aligned: "
3401 "obj %p target %d offset %d.\n",
3402 obj
, reloc
.target_handle
,
3403 (int) reloc
.offset
);
3404 drm_gem_object_unreference(target_obj
);
3405 i915_gem_object_unpin(obj
);
3409 /* and points to somewhere within the target object. */
3410 if (reloc
.delta
>= target_obj
->size
) {
3411 DRM_ERROR("Relocation beyond target object bounds: "
3412 "obj %p target %d delta %d size %d.\n",
3413 obj
, reloc
.target_handle
,
3414 (int) reloc
.delta
, (int) target_obj
->size
);
3415 drm_gem_object_unreference(target_obj
);
3416 i915_gem_object_unpin(obj
);
3420 reloc
.delta
+= target_obj_priv
->gtt_offset
;
3421 if (obj
->write_domain
== I915_GEM_DOMAIN_CPU
) {
3422 uint32_t page_offset
= reloc
.offset
& ~PAGE_MASK
;
3425 vaddr
= kmap_atomic(obj_priv
->pages
[reloc
.offset
>> PAGE_SHIFT
], KM_USER0
);
3426 *(uint32_t *)(vaddr
+ page_offset
) = reloc
.delta
;
3427 kunmap_atomic(vaddr
, KM_USER0
);
3429 uint32_t __iomem
*reloc_entry
;
3430 void __iomem
*reloc_page
;
3433 ret
= i915_gem_object_set_to_gtt_domain(obj
, 1);
3435 drm_gem_object_unreference(target_obj
);
3436 i915_gem_object_unpin(obj
);
3440 /* Map the page containing the relocation we're going to perform. */
3441 reloc
.offset
+= obj_priv
->gtt_offset
;
3442 reloc_page
= io_mapping_map_atomic_wc(dev_priv
->mm
.gtt_mapping
,
3443 reloc
.offset
& PAGE_MASK
,
3445 reloc_entry
= (uint32_t __iomem
*)
3446 (reloc_page
+ (reloc
.offset
& ~PAGE_MASK
));
3447 iowrite32(reloc
.delta
, reloc_entry
);
3448 io_mapping_unmap_atomic(reloc_page
, KM_USER0
);
3451 drm_gem_object_unreference(target_obj
);
3457 /* Throttle our rendering by waiting until the ring has completed our requests
3458 * emitted over 20 msec ago.
3460 * Note that if we were to use the current jiffies each time around the loop,
3461 * we wouldn't escape the function with any frames outstanding if the time to
3462 * render a frame was over 20ms.
3464 * This should get us reasonable parallelism between CPU and GPU but also
3465 * relatively low latency when blocking on a particular request to finish.
3468 i915_gem_ring_throttle(struct drm_device
*dev
, struct drm_file
*file
)
3470 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3471 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
3472 unsigned long recent_enough
= jiffies
- msecs_to_jiffies(20);
3473 struct drm_i915_gem_request
*request
;
3474 struct intel_ring_buffer
*ring
= NULL
;
3478 spin_lock(&file_priv
->mm
.lock
);
3479 list_for_each_entry(request
, &file_priv
->mm
.request_list
, client_list
) {
3480 if (time_after_eq(request
->emitted_jiffies
, recent_enough
))
3483 ring
= request
->ring
;
3484 seqno
= request
->seqno
;
3486 spin_unlock(&file_priv
->mm
.lock
);
3492 if (!i915_seqno_passed(ring
->get_seqno(dev
, ring
), seqno
)) {
3493 /* And wait for the seqno passing without holding any locks and
3494 * causing extra latency for others. This is safe as the irq
3495 * generation is designed to be run atomically and so is
3498 ring
->user_irq_get(dev
, ring
);
3499 ret
= wait_event_interruptible(ring
->irq_queue
,
3500 i915_seqno_passed(ring
->get_seqno(dev
, ring
), seqno
)
3501 || atomic_read(&dev_priv
->mm
.wedged
));
3502 ring
->user_irq_put(dev
, ring
);
3504 if (ret
== 0 && atomic_read(&dev_priv
->mm
.wedged
))
3509 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, 0);
3515 i915_gem_check_execbuffer(struct drm_i915_gem_execbuffer2
*exec
,
3516 uint64_t exec_offset
)
3518 uint32_t exec_start
, exec_len
;
3520 exec_start
= (uint32_t) exec_offset
+ exec
->batch_start_offset
;
3521 exec_len
= (uint32_t) exec
->batch_len
;
3523 if ((exec_start
| exec_len
) & 0x7)
3533 validate_exec_list(struct drm_i915_gem_exec_object2
*exec
,
3538 for (i
= 0; i
< count
; i
++) {
3539 char __user
*ptr
= (char __user
*)(uintptr_t)exec
[i
].relocs_ptr
;
3540 size_t length
= exec
[i
].relocation_count
* sizeof(struct drm_i915_gem_relocation_entry
);
3542 if (!access_ok(VERIFY_READ
, ptr
, length
))
3545 if (fault_in_pages_readable(ptr
, length
))
3553 i915_gem_do_execbuffer(struct drm_device
*dev
, void *data
,
3554 struct drm_file
*file_priv
,
3555 struct drm_i915_gem_execbuffer2
*args
,
3556 struct drm_i915_gem_exec_object2
*exec_list
)
3558 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3559 struct drm_gem_object
**object_list
= NULL
;
3560 struct drm_gem_object
*batch_obj
;
3561 struct drm_i915_gem_object
*obj_priv
;
3562 struct drm_clip_rect
*cliprects
= NULL
;
3563 struct drm_i915_gem_request
*request
= NULL
;
3564 int ret
, i
, pinned
= 0;
3565 uint64_t exec_offset
;
3566 int pin_tries
, flips
;
3568 struct intel_ring_buffer
*ring
= NULL
;
3570 ret
= i915_gem_check_is_wedged(dev
);
3574 ret
= validate_exec_list(exec_list
, args
->buffer_count
);
3579 DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n",
3580 (int) args
->buffers_ptr
, args
->buffer_count
, args
->batch_len
);
3582 if (args
->flags
& I915_EXEC_BSD
) {
3583 if (!HAS_BSD(dev
)) {
3584 DRM_ERROR("execbuf with wrong flag\n");
3587 ring
= &dev_priv
->bsd_ring
;
3589 ring
= &dev_priv
->render_ring
;
3592 if (args
->buffer_count
< 1) {
3593 DRM_ERROR("execbuf with %d buffers\n", args
->buffer_count
);
3596 object_list
= drm_malloc_ab(sizeof(*object_list
), args
->buffer_count
);
3597 if (object_list
== NULL
) {
3598 DRM_ERROR("Failed to allocate object list for %d buffers\n",
3599 args
->buffer_count
);
3604 if (args
->num_cliprects
!= 0) {
3605 cliprects
= kcalloc(args
->num_cliprects
, sizeof(*cliprects
),
3607 if (cliprects
== NULL
) {
3612 ret
= copy_from_user(cliprects
,
3613 (struct drm_clip_rect __user
*)
3614 (uintptr_t) args
->cliprects_ptr
,
3615 sizeof(*cliprects
) * args
->num_cliprects
);
3617 DRM_ERROR("copy %d cliprects failed: %d\n",
3618 args
->num_cliprects
, ret
);
3624 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
3625 if (request
== NULL
) {
3630 ret
= i915_mutex_lock_interruptible(dev
);
3634 if (dev_priv
->mm
.suspended
) {
3635 mutex_unlock(&dev
->struct_mutex
);
3640 /* Look up object handles */
3641 for (i
= 0; i
< args
->buffer_count
; i
++) {
3642 object_list
[i
] = drm_gem_object_lookup(dev
, file_priv
,
3643 exec_list
[i
].handle
);
3644 if (object_list
[i
] == NULL
) {
3645 DRM_ERROR("Invalid object handle %d at index %d\n",
3646 exec_list
[i
].handle
, i
);
3647 /* prevent error path from reading uninitialized data */
3648 args
->buffer_count
= i
+ 1;
3653 obj_priv
= to_intel_bo(object_list
[i
]);
3654 if (obj_priv
->in_execbuffer
) {
3655 DRM_ERROR("Object %p appears more than once in object list\n",
3657 /* prevent error path from reading uninitialized data */
3658 args
->buffer_count
= i
+ 1;
3662 obj_priv
->in_execbuffer
= true;
3665 /* Pin and relocate */
3666 for (pin_tries
= 0; ; pin_tries
++) {
3669 for (i
= 0; i
< args
->buffer_count
; i
++) {
3670 object_list
[i
]->pending_read_domains
= 0;
3671 object_list
[i
]->pending_write_domain
= 0;
3672 ret
= i915_gem_object_pin_and_relocate(object_list
[i
],
3683 /* error other than GTT full, or we've already tried again */
3684 if (ret
!= -ENOSPC
|| pin_tries
>= 1) {
3685 if (ret
!= -ERESTARTSYS
) {
3686 unsigned long long total_size
= 0;
3688 for (i
= 0; i
< args
->buffer_count
; i
++) {
3689 obj_priv
= to_intel_bo(object_list
[i
]);
3691 total_size
+= object_list
[i
]->size
;
3693 exec_list
[i
].flags
& EXEC_OBJECT_NEEDS_FENCE
&&
3694 obj_priv
->tiling_mode
!= I915_TILING_NONE
;
3696 DRM_ERROR("Failed to pin buffer %d of %d, total %llu bytes, %d fences: %d\n",
3697 pinned
+1, args
->buffer_count
,
3698 total_size
, num_fences
,
3700 DRM_ERROR("%u objects [%u pinned, %u GTT], "
3701 "%zu object bytes [%zu pinned], "
3702 "%zu /%zu gtt bytes\n",
3703 dev_priv
->mm
.object_count
,
3704 dev_priv
->mm
.pin_count
,
3705 dev_priv
->mm
.gtt_count
,
3706 dev_priv
->mm
.object_memory
,
3707 dev_priv
->mm
.pin_memory
,
3708 dev_priv
->mm
.gtt_memory
,
3709 dev_priv
->mm
.gtt_total
);
3714 /* unpin all of our buffers */
3715 for (i
= 0; i
< pinned
; i
++)
3716 i915_gem_object_unpin(object_list
[i
]);
3719 /* evict everyone we can from the aperture */
3720 ret
= i915_gem_evict_everything(dev
);
3721 if (ret
&& ret
!= -ENOSPC
)
3725 /* Set the pending read domains for the batch buffer to COMMAND */
3726 batch_obj
= object_list
[args
->buffer_count
-1];
3727 if (batch_obj
->pending_write_domain
) {
3728 DRM_ERROR("Attempting to use self-modifying batch buffer\n");
3732 batch_obj
->pending_read_domains
|= I915_GEM_DOMAIN_COMMAND
;
3734 /* Sanity check the batch buffer, prior to moving objects */
3735 exec_offset
= exec_list
[args
->buffer_count
- 1].offset
;
3736 ret
= i915_gem_check_execbuffer (args
, exec_offset
);
3738 DRM_ERROR("execbuf with invalid offset/length\n");
3742 /* Zero the global flush/invalidate flags. These
3743 * will be modified as new domains are computed
3746 dev
->invalidate_domains
= 0;
3747 dev
->flush_domains
= 0;
3748 dev_priv
->mm
.flush_rings
= 0;
3750 for (i
= 0; i
< args
->buffer_count
; i
++) {
3751 struct drm_gem_object
*obj
= object_list
[i
];
3753 /* Compute new gpu domains and update invalidate/flush */
3754 i915_gem_object_set_to_gpu_domain(obj
);
3757 if (dev
->invalidate_domains
| dev
->flush_domains
) {
3759 DRM_INFO("%s: invalidate_domains %08x flush_domains %08x\n",
3761 dev
->invalidate_domains
,
3762 dev
->flush_domains
);
3764 i915_gem_flush(dev
, file_priv
,
3765 dev
->invalidate_domains
,
3767 dev_priv
->mm
.flush_rings
);
3770 for (i
= 0; i
< args
->buffer_count
; i
++) {
3771 struct drm_gem_object
*obj
= object_list
[i
];
3772 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
3773 uint32_t old_write_domain
= obj
->write_domain
;
3775 obj
->write_domain
= obj
->pending_write_domain
;
3776 if (obj
->write_domain
)
3777 list_move_tail(&obj_priv
->gpu_write_list
,
3778 &dev_priv
->mm
.gpu_write_list
);
3780 trace_i915_gem_object_change_domain(obj
,
3786 for (i
= 0; i
< args
->buffer_count
; i
++) {
3787 i915_gem_object_check_coherency(object_list
[i
],
3788 exec_list
[i
].handle
);
3793 i915_gem_dump_object(batch_obj
,
3799 /* Check for any pending flips. As we only maintain a flip queue depth
3800 * of 1, we can simply insert a WAIT for the next display flip prior
3801 * to executing the batch and avoid stalling the CPU.
3804 for (i
= 0; i
< args
->buffer_count
; i
++) {
3805 if (object_list
[i
]->write_domain
)
3806 flips
|= atomic_read(&to_intel_bo(object_list
[i
])->pending_flip
);
3809 int plane
, flip_mask
;
3811 for (plane
= 0; flips
>> plane
; plane
++) {
3812 if (((flips
>> plane
) & 1) == 0)
3816 flip_mask
= MI_WAIT_FOR_PLANE_B_FLIP
;
3818 flip_mask
= MI_WAIT_FOR_PLANE_A_FLIP
;
3820 intel_ring_begin(dev
, ring
, 2);
3821 intel_ring_emit(dev
, ring
,
3822 MI_WAIT_FOR_EVENT
| flip_mask
);
3823 intel_ring_emit(dev
, ring
, MI_NOOP
);
3824 intel_ring_advance(dev
, ring
);
3828 /* Exec the batchbuffer */
3829 ret
= ring
->dispatch_gem_execbuffer(dev
, ring
, args
,
3830 cliprects
, exec_offset
);
3832 DRM_ERROR("dispatch failed %d\n", ret
);
3837 * Ensure that the commands in the batch buffer are
3838 * finished before the interrupt fires
3840 i915_retire_commands(dev
, ring
);
3842 for (i
= 0; i
< args
->buffer_count
; i
++) {
3843 struct drm_gem_object
*obj
= object_list
[i
];
3844 obj_priv
= to_intel_bo(obj
);
3846 i915_gem_object_move_to_active(obj
, ring
);
3849 i915_add_request(dev
, file_priv
, request
, ring
);
3853 for (i
= 0; i
< pinned
; i
++)
3854 i915_gem_object_unpin(object_list
[i
]);
3856 for (i
= 0; i
< args
->buffer_count
; i
++) {
3857 if (object_list
[i
]) {
3858 obj_priv
= to_intel_bo(object_list
[i
]);
3859 obj_priv
->in_execbuffer
= false;
3861 drm_gem_object_unreference(object_list
[i
]);
3864 mutex_unlock(&dev
->struct_mutex
);
3867 drm_free_large(object_list
);
3875 * Legacy execbuffer just creates an exec2 list from the original exec object
3876 * list array and passes it to the real function.
3879 i915_gem_execbuffer(struct drm_device
*dev
, void *data
,
3880 struct drm_file
*file_priv
)
3882 struct drm_i915_gem_execbuffer
*args
= data
;
3883 struct drm_i915_gem_execbuffer2 exec2
;
3884 struct drm_i915_gem_exec_object
*exec_list
= NULL
;
3885 struct drm_i915_gem_exec_object2
*exec2_list
= NULL
;
3889 DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n",
3890 (int) args
->buffers_ptr
, args
->buffer_count
, args
->batch_len
);
3893 if (args
->buffer_count
< 1) {
3894 DRM_ERROR("execbuf with %d buffers\n", args
->buffer_count
);
3898 /* Copy in the exec list from userland */
3899 exec_list
= drm_malloc_ab(sizeof(*exec_list
), args
->buffer_count
);
3900 exec2_list
= drm_malloc_ab(sizeof(*exec2_list
), args
->buffer_count
);
3901 if (exec_list
== NULL
|| exec2_list
== NULL
) {
3902 DRM_ERROR("Failed to allocate exec list for %d buffers\n",
3903 args
->buffer_count
);
3904 drm_free_large(exec_list
);
3905 drm_free_large(exec2_list
);
3908 ret
= copy_from_user(exec_list
,
3909 (struct drm_i915_relocation_entry __user
*)
3910 (uintptr_t) args
->buffers_ptr
,
3911 sizeof(*exec_list
) * args
->buffer_count
);
3913 DRM_ERROR("copy %d exec entries failed %d\n",
3914 args
->buffer_count
, ret
);
3915 drm_free_large(exec_list
);
3916 drm_free_large(exec2_list
);
3920 for (i
= 0; i
< args
->buffer_count
; i
++) {
3921 exec2_list
[i
].handle
= exec_list
[i
].handle
;
3922 exec2_list
[i
].relocation_count
= exec_list
[i
].relocation_count
;
3923 exec2_list
[i
].relocs_ptr
= exec_list
[i
].relocs_ptr
;
3924 exec2_list
[i
].alignment
= exec_list
[i
].alignment
;
3925 exec2_list
[i
].offset
= exec_list
[i
].offset
;
3926 if (INTEL_INFO(dev
)->gen
< 4)
3927 exec2_list
[i
].flags
= EXEC_OBJECT_NEEDS_FENCE
;
3929 exec2_list
[i
].flags
= 0;
3932 exec2
.buffers_ptr
= args
->buffers_ptr
;
3933 exec2
.buffer_count
= args
->buffer_count
;
3934 exec2
.batch_start_offset
= args
->batch_start_offset
;
3935 exec2
.batch_len
= args
->batch_len
;
3936 exec2
.DR1
= args
->DR1
;
3937 exec2
.DR4
= args
->DR4
;
3938 exec2
.num_cliprects
= args
->num_cliprects
;
3939 exec2
.cliprects_ptr
= args
->cliprects_ptr
;
3940 exec2
.flags
= I915_EXEC_RENDER
;
3942 ret
= i915_gem_do_execbuffer(dev
, data
, file_priv
, &exec2
, exec2_list
);
3944 /* Copy the new buffer offsets back to the user's exec list. */
3945 for (i
= 0; i
< args
->buffer_count
; i
++)
3946 exec_list
[i
].offset
= exec2_list
[i
].offset
;
3947 /* ... and back out to userspace */
3948 ret
= copy_to_user((struct drm_i915_relocation_entry __user
*)
3949 (uintptr_t) args
->buffers_ptr
,
3951 sizeof(*exec_list
) * args
->buffer_count
);
3954 DRM_ERROR("failed to copy %d exec entries "
3955 "back to user (%d)\n",
3956 args
->buffer_count
, ret
);
3960 drm_free_large(exec_list
);
3961 drm_free_large(exec2_list
);
3966 i915_gem_execbuffer2(struct drm_device
*dev
, void *data
,
3967 struct drm_file
*file_priv
)
3969 struct drm_i915_gem_execbuffer2
*args
= data
;
3970 struct drm_i915_gem_exec_object2
*exec2_list
= NULL
;
3974 DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n",
3975 (int) args
->buffers_ptr
, args
->buffer_count
, args
->batch_len
);
3978 if (args
->buffer_count
< 1) {
3979 DRM_ERROR("execbuf2 with %d buffers\n", args
->buffer_count
);
3983 exec2_list
= drm_malloc_ab(sizeof(*exec2_list
), args
->buffer_count
);
3984 if (exec2_list
== NULL
) {
3985 DRM_ERROR("Failed to allocate exec list for %d buffers\n",
3986 args
->buffer_count
);
3989 ret
= copy_from_user(exec2_list
,
3990 (struct drm_i915_relocation_entry __user
*)
3991 (uintptr_t) args
->buffers_ptr
,
3992 sizeof(*exec2_list
) * args
->buffer_count
);
3994 DRM_ERROR("copy %d exec entries failed %d\n",
3995 args
->buffer_count
, ret
);
3996 drm_free_large(exec2_list
);
4000 ret
= i915_gem_do_execbuffer(dev
, data
, file_priv
, args
, exec2_list
);
4002 /* Copy the new buffer offsets back to the user's exec list. */
4003 ret
= copy_to_user((struct drm_i915_relocation_entry __user
*)
4004 (uintptr_t) args
->buffers_ptr
,
4006 sizeof(*exec2_list
) * args
->buffer_count
);
4009 DRM_ERROR("failed to copy %d exec entries "
4010 "back to user (%d)\n",
4011 args
->buffer_count
, ret
);
4015 drm_free_large(exec2_list
);
4020 i915_gem_object_pin(struct drm_gem_object
*obj
, uint32_t alignment
)
4022 struct drm_device
*dev
= obj
->dev
;
4023 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4024 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4027 BUG_ON(obj_priv
->pin_count
== DRM_I915_GEM_OBJECT_MAX_PIN_COUNT
);
4028 WARN_ON(i915_verify_lists(dev
));
4030 if (obj_priv
->gtt_space
!= NULL
) {
4032 alignment
= i915_gem_get_gtt_alignment(obj
);
4033 if (obj_priv
->gtt_offset
& (alignment
- 1)) {
4034 WARN(obj_priv
->pin_count
,
4035 "bo is already pinned with incorrect alignment:"
4036 " offset=%x, req.alignment=%x\n",
4037 obj_priv
->gtt_offset
, alignment
);
4038 ret
= i915_gem_object_unbind(obj
);
4044 if (obj_priv
->gtt_space
== NULL
) {
4045 ret
= i915_gem_object_bind_to_gtt(obj
, alignment
);
4050 obj_priv
->pin_count
++;
4052 /* If the object is not active and not pending a flush,
4053 * remove it from the inactive list
4055 if (obj_priv
->pin_count
== 1) {
4056 i915_gem_info_add_pin(dev_priv
, obj
->size
);
4057 if (!obj_priv
->active
)
4058 list_move_tail(&obj_priv
->list
,
4059 &dev_priv
->mm
.pinned_list
);
4062 WARN_ON(i915_verify_lists(dev
));
4067 i915_gem_object_unpin(struct drm_gem_object
*obj
)
4069 struct drm_device
*dev
= obj
->dev
;
4070 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4071 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4073 WARN_ON(i915_verify_lists(dev
));
4074 obj_priv
->pin_count
--;
4075 BUG_ON(obj_priv
->pin_count
< 0);
4076 BUG_ON(obj_priv
->gtt_space
== NULL
);
4078 /* If the object is no longer pinned, and is
4079 * neither active nor being flushed, then stick it on
4082 if (obj_priv
->pin_count
== 0) {
4083 if (!obj_priv
->active
)
4084 list_move_tail(&obj_priv
->list
,
4085 &dev_priv
->mm
.inactive_list
);
4086 i915_gem_info_remove_pin(dev_priv
, obj
->size
);
4088 WARN_ON(i915_verify_lists(dev
));
4092 i915_gem_pin_ioctl(struct drm_device
*dev
, void *data
,
4093 struct drm_file
*file_priv
)
4095 struct drm_i915_gem_pin
*args
= data
;
4096 struct drm_gem_object
*obj
;
4097 struct drm_i915_gem_object
*obj_priv
;
4100 ret
= i915_mutex_lock_interruptible(dev
);
4104 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
4109 obj_priv
= to_intel_bo(obj
);
4111 if (obj_priv
->madv
!= I915_MADV_WILLNEED
) {
4112 DRM_ERROR("Attempting to pin a purgeable buffer\n");
4117 if (obj_priv
->pin_filp
!= NULL
&& obj_priv
->pin_filp
!= file_priv
) {
4118 DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n",
4124 obj_priv
->user_pin_count
++;
4125 obj_priv
->pin_filp
= file_priv
;
4126 if (obj_priv
->user_pin_count
== 1) {
4127 ret
= i915_gem_object_pin(obj
, args
->alignment
);
4132 /* XXX - flush the CPU caches for pinned objects
4133 * as the X server doesn't manage domains yet
4135 i915_gem_object_flush_cpu_write_domain(obj
);
4136 args
->offset
= obj_priv
->gtt_offset
;
4138 drm_gem_object_unreference(obj
);
4140 mutex_unlock(&dev
->struct_mutex
);
4145 i915_gem_unpin_ioctl(struct drm_device
*dev
, void *data
,
4146 struct drm_file
*file_priv
)
4148 struct drm_i915_gem_pin
*args
= data
;
4149 struct drm_gem_object
*obj
;
4150 struct drm_i915_gem_object
*obj_priv
;
4153 ret
= i915_mutex_lock_interruptible(dev
);
4157 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
4162 obj_priv
= to_intel_bo(obj
);
4164 if (obj_priv
->pin_filp
!= file_priv
) {
4165 DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n",
4170 obj_priv
->user_pin_count
--;
4171 if (obj_priv
->user_pin_count
== 0) {
4172 obj_priv
->pin_filp
= NULL
;
4173 i915_gem_object_unpin(obj
);
4177 drm_gem_object_unreference(obj
);
4179 mutex_unlock(&dev
->struct_mutex
);
4184 i915_gem_busy_ioctl(struct drm_device
*dev
, void *data
,
4185 struct drm_file
*file_priv
)
4187 struct drm_i915_gem_busy
*args
= data
;
4188 struct drm_gem_object
*obj
;
4189 struct drm_i915_gem_object
*obj_priv
;
4192 ret
= i915_mutex_lock_interruptible(dev
);
4196 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
4201 obj_priv
= to_intel_bo(obj
);
4203 /* Count all active objects as busy, even if they are currently not used
4204 * by the gpu. Users of this interface expect objects to eventually
4205 * become non-busy without any further actions, therefore emit any
4206 * necessary flushes here.
4208 args
->busy
= obj_priv
->active
;
4210 /* Unconditionally flush objects, even when the gpu still uses this
4211 * object. Userspace calling this function indicates that it wants to
4212 * use this buffer rather sooner than later, so issuing the required
4213 * flush earlier is beneficial.
4215 if (obj
->write_domain
& I915_GEM_GPU_DOMAINS
)
4216 i915_gem_flush_ring(dev
, file_priv
,
4218 0, obj
->write_domain
);
4220 /* Update the active list for the hardware's current position.
4221 * Otherwise this only updates on a delayed timer or when irqs
4222 * are actually unmasked, and our working set ends up being
4223 * larger than required.
4225 i915_gem_retire_requests_ring(dev
, obj_priv
->ring
);
4227 args
->busy
= obj_priv
->active
;
4230 drm_gem_object_unreference(obj
);
4232 mutex_unlock(&dev
->struct_mutex
);
4237 i915_gem_throttle_ioctl(struct drm_device
*dev
, void *data
,
4238 struct drm_file
*file_priv
)
4240 return i915_gem_ring_throttle(dev
, file_priv
);
4244 i915_gem_madvise_ioctl(struct drm_device
*dev
, void *data
,
4245 struct drm_file
*file_priv
)
4247 struct drm_i915_gem_madvise
*args
= data
;
4248 struct drm_gem_object
*obj
;
4249 struct drm_i915_gem_object
*obj_priv
;
4252 switch (args
->madv
) {
4253 case I915_MADV_DONTNEED
:
4254 case I915_MADV_WILLNEED
:
4260 ret
= i915_mutex_lock_interruptible(dev
);
4264 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
4269 obj_priv
= to_intel_bo(obj
);
4271 if (obj_priv
->pin_count
) {
4276 if (obj_priv
->madv
!= __I915_MADV_PURGED
)
4277 obj_priv
->madv
= args
->madv
;
4279 /* if the object is no longer bound, discard its backing storage */
4280 if (i915_gem_object_is_purgeable(obj_priv
) &&
4281 obj_priv
->gtt_space
== NULL
)
4282 i915_gem_object_truncate(obj
);
4284 args
->retained
= obj_priv
->madv
!= __I915_MADV_PURGED
;
4287 drm_gem_object_unreference(obj
);
4289 mutex_unlock(&dev
->struct_mutex
);
4293 struct drm_gem_object
* i915_gem_alloc_object(struct drm_device
*dev
,
4296 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4297 struct drm_i915_gem_object
*obj
;
4299 obj
= kzalloc(sizeof(*obj
), GFP_KERNEL
);
4303 if (drm_gem_object_init(dev
, &obj
->base
, size
) != 0) {
4308 i915_gem_info_add_obj(dev_priv
, size
);
4310 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
4311 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
4313 obj
->agp_type
= AGP_USER_MEMORY
;
4314 obj
->base
.driver_private
= NULL
;
4315 obj
->fence_reg
= I915_FENCE_REG_NONE
;
4316 INIT_LIST_HEAD(&obj
->list
);
4317 INIT_LIST_HEAD(&obj
->gpu_write_list
);
4318 obj
->madv
= I915_MADV_WILLNEED
;
4323 int i915_gem_init_object(struct drm_gem_object
*obj
)
4330 static void i915_gem_free_object_tail(struct drm_gem_object
*obj
)
4332 struct drm_device
*dev
= obj
->dev
;
4333 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4334 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4337 ret
= i915_gem_object_unbind(obj
);
4338 if (ret
== -ERESTARTSYS
) {
4339 list_move(&obj_priv
->list
,
4340 &dev_priv
->mm
.deferred_free_list
);
4344 if (obj_priv
->mmap_offset
)
4345 i915_gem_free_mmap_offset(obj
);
4347 drm_gem_object_release(obj
);
4348 i915_gem_info_remove_obj(dev_priv
, obj
->size
);
4350 kfree(obj_priv
->page_cpu_valid
);
4351 kfree(obj_priv
->bit_17
);
4355 void i915_gem_free_object(struct drm_gem_object
*obj
)
4357 struct drm_device
*dev
= obj
->dev
;
4358 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4360 trace_i915_gem_object_destroy(obj
);
4362 while (obj_priv
->pin_count
> 0)
4363 i915_gem_object_unpin(obj
);
4365 if (obj_priv
->phys_obj
)
4366 i915_gem_detach_phys_object(dev
, obj
);
4368 i915_gem_free_object_tail(obj
);
4372 i915_gem_idle(struct drm_device
*dev
)
4374 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4377 mutex_lock(&dev
->struct_mutex
);
4379 if (dev_priv
->mm
.suspended
||
4380 (dev_priv
->render_ring
.gem_object
== NULL
) ||
4382 dev_priv
->bsd_ring
.gem_object
== NULL
)) {
4383 mutex_unlock(&dev
->struct_mutex
);
4387 ret
= i915_gpu_idle(dev
);
4389 mutex_unlock(&dev
->struct_mutex
);
4393 /* Under UMS, be paranoid and evict. */
4394 if (!drm_core_check_feature(dev
, DRIVER_MODESET
)) {
4395 ret
= i915_gem_evict_inactive(dev
);
4397 mutex_unlock(&dev
->struct_mutex
);
4402 /* Hack! Don't let anybody do execbuf while we don't control the chip.
4403 * We need to replace this with a semaphore, or something.
4404 * And not confound mm.suspended!
4406 dev_priv
->mm
.suspended
= 1;
4407 del_timer_sync(&dev_priv
->hangcheck_timer
);
4409 i915_kernel_lost_context(dev
);
4410 i915_gem_cleanup_ringbuffer(dev
);
4412 mutex_unlock(&dev
->struct_mutex
);
4414 /* Cancel the retire work handler, which should be idle now. */
4415 cancel_delayed_work_sync(&dev_priv
->mm
.retire_work
);
4421 * 965+ support PIPE_CONTROL commands, which provide finer grained control
4422 * over cache flushing.
4425 i915_gem_init_pipe_control(struct drm_device
*dev
)
4427 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4428 struct drm_gem_object
*obj
;
4429 struct drm_i915_gem_object
*obj_priv
;
4432 obj
= i915_gem_alloc_object(dev
, 4096);
4434 DRM_ERROR("Failed to allocate seqno page\n");
4438 obj_priv
= to_intel_bo(obj
);
4439 obj_priv
->agp_type
= AGP_USER_CACHED_MEMORY
;
4441 ret
= i915_gem_object_pin(obj
, 4096);
4445 dev_priv
->seqno_gfx_addr
= obj_priv
->gtt_offset
;
4446 dev_priv
->seqno_page
= kmap(obj_priv
->pages
[0]);
4447 if (dev_priv
->seqno_page
== NULL
)
4450 dev_priv
->seqno_obj
= obj
;
4451 memset(dev_priv
->seqno_page
, 0, PAGE_SIZE
);
4456 i915_gem_object_unpin(obj
);
4458 drm_gem_object_unreference(obj
);
4465 i915_gem_cleanup_pipe_control(struct drm_device
*dev
)
4467 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4468 struct drm_gem_object
*obj
;
4469 struct drm_i915_gem_object
*obj_priv
;
4471 obj
= dev_priv
->seqno_obj
;
4472 obj_priv
= to_intel_bo(obj
);
4473 kunmap(obj_priv
->pages
[0]);
4474 i915_gem_object_unpin(obj
);
4475 drm_gem_object_unreference(obj
);
4476 dev_priv
->seqno_obj
= NULL
;
4478 dev_priv
->seqno_page
= NULL
;
4482 i915_gem_init_ringbuffer(struct drm_device
*dev
)
4484 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4487 if (HAS_PIPE_CONTROL(dev
)) {
4488 ret
= i915_gem_init_pipe_control(dev
);
4493 ret
= intel_init_render_ring_buffer(dev
);
4495 goto cleanup_pipe_control
;
4498 ret
= intel_init_bsd_ring_buffer(dev
);
4500 goto cleanup_render_ring
;
4503 dev_priv
->next_seqno
= 1;
4507 cleanup_render_ring
:
4508 intel_cleanup_ring_buffer(dev
, &dev_priv
->render_ring
);
4509 cleanup_pipe_control
:
4510 if (HAS_PIPE_CONTROL(dev
))
4511 i915_gem_cleanup_pipe_control(dev
);
4516 i915_gem_cleanup_ringbuffer(struct drm_device
*dev
)
4518 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4520 intel_cleanup_ring_buffer(dev
, &dev_priv
->render_ring
);
4522 intel_cleanup_ring_buffer(dev
, &dev_priv
->bsd_ring
);
4523 if (HAS_PIPE_CONTROL(dev
))
4524 i915_gem_cleanup_pipe_control(dev
);
4528 i915_gem_entervt_ioctl(struct drm_device
*dev
, void *data
,
4529 struct drm_file
*file_priv
)
4531 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4534 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4537 if (atomic_read(&dev_priv
->mm
.wedged
)) {
4538 DRM_ERROR("Reenabling wedged hardware, good luck\n");
4539 atomic_set(&dev_priv
->mm
.wedged
, 0);
4542 mutex_lock(&dev
->struct_mutex
);
4543 dev_priv
->mm
.suspended
= 0;
4545 ret
= i915_gem_init_ringbuffer(dev
);
4547 mutex_unlock(&dev
->struct_mutex
);
4551 BUG_ON(!list_empty(&dev_priv
->render_ring
.active_list
));
4552 BUG_ON(HAS_BSD(dev
) && !list_empty(&dev_priv
->bsd_ring
.active_list
));
4553 BUG_ON(!list_empty(&dev_priv
->mm
.flushing_list
));
4554 BUG_ON(!list_empty(&dev_priv
->mm
.inactive_list
));
4555 BUG_ON(!list_empty(&dev_priv
->render_ring
.request_list
));
4556 BUG_ON(HAS_BSD(dev
) && !list_empty(&dev_priv
->bsd_ring
.request_list
));
4557 mutex_unlock(&dev
->struct_mutex
);
4559 ret
= drm_irq_install(dev
);
4561 goto cleanup_ringbuffer
;
4566 mutex_lock(&dev
->struct_mutex
);
4567 i915_gem_cleanup_ringbuffer(dev
);
4568 dev_priv
->mm
.suspended
= 1;
4569 mutex_unlock(&dev
->struct_mutex
);
4575 i915_gem_leavevt_ioctl(struct drm_device
*dev
, void *data
,
4576 struct drm_file
*file_priv
)
4578 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4581 drm_irq_uninstall(dev
);
4582 return i915_gem_idle(dev
);
4586 i915_gem_lastclose(struct drm_device
*dev
)
4590 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4593 ret
= i915_gem_idle(dev
);
4595 DRM_ERROR("failed to idle hardware: %d\n", ret
);
4599 i915_gem_load(struct drm_device
*dev
)
4602 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4604 INIT_LIST_HEAD(&dev_priv
->mm
.flushing_list
);
4605 INIT_LIST_HEAD(&dev_priv
->mm
.gpu_write_list
);
4606 INIT_LIST_HEAD(&dev_priv
->mm
.inactive_list
);
4607 INIT_LIST_HEAD(&dev_priv
->mm
.pinned_list
);
4608 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
4609 INIT_LIST_HEAD(&dev_priv
->mm
.deferred_free_list
);
4610 INIT_LIST_HEAD(&dev_priv
->render_ring
.active_list
);
4611 INIT_LIST_HEAD(&dev_priv
->render_ring
.request_list
);
4613 INIT_LIST_HEAD(&dev_priv
->bsd_ring
.active_list
);
4614 INIT_LIST_HEAD(&dev_priv
->bsd_ring
.request_list
);
4616 for (i
= 0; i
< 16; i
++)
4617 INIT_LIST_HEAD(&dev_priv
->fence_regs
[i
].lru_list
);
4618 INIT_DELAYED_WORK(&dev_priv
->mm
.retire_work
,
4619 i915_gem_retire_work_handler
);
4620 init_completion(&dev_priv
->error_completion
);
4621 spin_lock(&shrink_list_lock
);
4622 list_add(&dev_priv
->mm
.shrink_list
, &shrink_list
);
4623 spin_unlock(&shrink_list_lock
);
4625 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
4627 u32 tmp
= I915_READ(MI_ARB_STATE
);
4628 if (!(tmp
& MI_ARB_C3_LP_WRITE_ENABLE
)) {
4629 /* arb state is a masked write, so set bit + bit in mask */
4630 tmp
= MI_ARB_C3_LP_WRITE_ENABLE
| (MI_ARB_C3_LP_WRITE_ENABLE
<< MI_ARB_MASK_SHIFT
);
4631 I915_WRITE(MI_ARB_STATE
, tmp
);
4635 /* Old X drivers will take 0-2 for front, back, depth buffers */
4636 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
4637 dev_priv
->fence_reg_start
= 3;
4639 if (INTEL_INFO(dev
)->gen
>= 4 || IS_I945G(dev
) || IS_I945GM(dev
) || IS_G33(dev
))
4640 dev_priv
->num_fence_regs
= 16;
4642 dev_priv
->num_fence_regs
= 8;
4644 /* Initialize fence registers to zero */
4645 switch (INTEL_INFO(dev
)->gen
) {
4647 for (i
= 0; i
< 16; i
++)
4648 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0
+ (i
* 8), 0);
4652 for (i
= 0; i
< 16; i
++)
4653 I915_WRITE64(FENCE_REG_965_0
+ (i
* 8), 0);
4656 if (IS_I945G(dev
) || IS_I945GM(dev
) || IS_G33(dev
))
4657 for (i
= 0; i
< 8; i
++)
4658 I915_WRITE(FENCE_REG_945_8
+ (i
* 4), 0);
4660 for (i
= 0; i
< 8; i
++)
4661 I915_WRITE(FENCE_REG_830_0
+ (i
* 4), 0);
4664 i915_gem_detect_bit_6_swizzle(dev
);
4665 init_waitqueue_head(&dev_priv
->pending_flip_queue
);
4669 * Create a physically contiguous memory object for this object
4670 * e.g. for cursor + overlay regs
4672 static int i915_gem_init_phys_object(struct drm_device
*dev
,
4673 int id
, int size
, int align
)
4675 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4676 struct drm_i915_gem_phys_object
*phys_obj
;
4679 if (dev_priv
->mm
.phys_objs
[id
- 1] || !size
)
4682 phys_obj
= kzalloc(sizeof(struct drm_i915_gem_phys_object
), GFP_KERNEL
);
4688 phys_obj
->handle
= drm_pci_alloc(dev
, size
, align
);
4689 if (!phys_obj
->handle
) {
4694 set_memory_wc((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
4697 dev_priv
->mm
.phys_objs
[id
- 1] = phys_obj
;
4705 static void i915_gem_free_phys_object(struct drm_device
*dev
, int id
)
4707 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4708 struct drm_i915_gem_phys_object
*phys_obj
;
4710 if (!dev_priv
->mm
.phys_objs
[id
- 1])
4713 phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4714 if (phys_obj
->cur_obj
) {
4715 i915_gem_detach_phys_object(dev
, phys_obj
->cur_obj
);
4719 set_memory_wb((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
4721 drm_pci_free(dev
, phys_obj
->handle
);
4723 dev_priv
->mm
.phys_objs
[id
- 1] = NULL
;
4726 void i915_gem_free_all_phys_object(struct drm_device
*dev
)
4730 for (i
= I915_GEM_PHYS_CURSOR_0
; i
<= I915_MAX_PHYS_OBJECT
; i
++)
4731 i915_gem_free_phys_object(dev
, i
);
4734 void i915_gem_detach_phys_object(struct drm_device
*dev
,
4735 struct drm_gem_object
*obj
)
4737 struct drm_i915_gem_object
*obj_priv
;
4742 obj_priv
= to_intel_bo(obj
);
4743 if (!obj_priv
->phys_obj
)
4746 ret
= i915_gem_object_get_pages(obj
, 0);
4750 page_count
= obj
->size
/ PAGE_SIZE
;
4752 for (i
= 0; i
< page_count
; i
++) {
4753 char *dst
= kmap_atomic(obj_priv
->pages
[i
], KM_USER0
);
4754 char *src
= obj_priv
->phys_obj
->handle
->vaddr
+ (i
* PAGE_SIZE
);
4756 memcpy(dst
, src
, PAGE_SIZE
);
4757 kunmap_atomic(dst
, KM_USER0
);
4759 drm_clflush_pages(obj_priv
->pages
, page_count
);
4760 drm_agp_chipset_flush(dev
);
4762 i915_gem_object_put_pages(obj
);
4764 obj_priv
->phys_obj
->cur_obj
= NULL
;
4765 obj_priv
->phys_obj
= NULL
;
4769 i915_gem_attach_phys_object(struct drm_device
*dev
,
4770 struct drm_gem_object
*obj
,
4774 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4775 struct drm_i915_gem_object
*obj_priv
;
4780 if (id
> I915_MAX_PHYS_OBJECT
)
4783 obj_priv
= to_intel_bo(obj
);
4785 if (obj_priv
->phys_obj
) {
4786 if (obj_priv
->phys_obj
->id
== id
)
4788 i915_gem_detach_phys_object(dev
, obj
);
4791 /* create a new object */
4792 if (!dev_priv
->mm
.phys_objs
[id
- 1]) {
4793 ret
= i915_gem_init_phys_object(dev
, id
,
4796 DRM_ERROR("failed to init phys object %d size: %zu\n", id
, obj
->size
);
4801 /* bind to the object */
4802 obj_priv
->phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4803 obj_priv
->phys_obj
->cur_obj
= obj
;
4805 ret
= i915_gem_object_get_pages(obj
, 0);
4807 DRM_ERROR("failed to get page list\n");
4811 page_count
= obj
->size
/ PAGE_SIZE
;
4813 for (i
= 0; i
< page_count
; i
++) {
4814 char *src
= kmap_atomic(obj_priv
->pages
[i
], KM_USER0
);
4815 char *dst
= obj_priv
->phys_obj
->handle
->vaddr
+ (i
* PAGE_SIZE
);
4817 memcpy(dst
, src
, PAGE_SIZE
);
4818 kunmap_atomic(src
, KM_USER0
);
4821 i915_gem_object_put_pages(obj
);
4829 i915_gem_phys_pwrite(struct drm_device
*dev
, struct drm_gem_object
*obj
,
4830 struct drm_i915_gem_pwrite
*args
,
4831 struct drm_file
*file_priv
)
4833 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4836 char __user
*user_data
;
4838 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
4839 obj_addr
= obj_priv
->phys_obj
->handle
->vaddr
+ args
->offset
;
4841 DRM_DEBUG_DRIVER("obj_addr %p, %lld\n", obj_addr
, args
->size
);
4842 ret
= copy_from_user(obj_addr
, user_data
, args
->size
);
4846 drm_agp_chipset_flush(dev
);
4850 void i915_gem_release(struct drm_device
*dev
, struct drm_file
*file
)
4852 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
4854 /* Clean up our request list when the client is going away, so that
4855 * later retire_requests won't dereference our soon-to-be-gone
4858 spin_lock(&file_priv
->mm
.lock
);
4859 while (!list_empty(&file_priv
->mm
.request_list
)) {
4860 struct drm_i915_gem_request
*request
;
4862 request
= list_first_entry(&file_priv
->mm
.request_list
,
4863 struct drm_i915_gem_request
,
4865 list_del(&request
->client_list
);
4866 request
->file_priv
= NULL
;
4868 spin_unlock(&file_priv
->mm
.lock
);
4872 i915_gpu_is_active(struct drm_device
*dev
)
4874 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4877 lists_empty
= list_empty(&dev_priv
->mm
.flushing_list
) &&
4878 list_empty(&dev_priv
->render_ring
.active_list
);
4880 lists_empty
&= list_empty(&dev_priv
->bsd_ring
.active_list
);
4882 return !lists_empty
;
4886 i915_gem_shrink(struct shrinker
*shrink
, int nr_to_scan
, gfp_t gfp_mask
)
4888 drm_i915_private_t
*dev_priv
, *next_dev
;
4889 struct drm_i915_gem_object
*obj_priv
, *next_obj
;
4891 int would_deadlock
= 1;
4893 /* "fast-path" to count number of available objects */
4894 if (nr_to_scan
== 0) {
4895 spin_lock(&shrink_list_lock
);
4896 list_for_each_entry(dev_priv
, &shrink_list
, mm
.shrink_list
) {
4897 struct drm_device
*dev
= dev_priv
->dev
;
4899 if (mutex_trylock(&dev
->struct_mutex
)) {
4900 list_for_each_entry(obj_priv
,
4901 &dev_priv
->mm
.inactive_list
,
4904 mutex_unlock(&dev
->struct_mutex
);
4907 spin_unlock(&shrink_list_lock
);
4909 return (cnt
/ 100) * sysctl_vfs_cache_pressure
;
4912 spin_lock(&shrink_list_lock
);
4915 /* first scan for clean buffers */
4916 list_for_each_entry_safe(dev_priv
, next_dev
,
4917 &shrink_list
, mm
.shrink_list
) {
4918 struct drm_device
*dev
= dev_priv
->dev
;
4920 if (! mutex_trylock(&dev
->struct_mutex
))
4923 spin_unlock(&shrink_list_lock
);
4924 i915_gem_retire_requests(dev
);
4926 list_for_each_entry_safe(obj_priv
, next_obj
,
4927 &dev_priv
->mm
.inactive_list
,
4929 if (i915_gem_object_is_purgeable(obj_priv
)) {
4930 i915_gem_object_unbind(&obj_priv
->base
);
4931 if (--nr_to_scan
<= 0)
4936 spin_lock(&shrink_list_lock
);
4937 mutex_unlock(&dev
->struct_mutex
);
4941 if (nr_to_scan
<= 0)
4945 /* second pass, evict/count anything still on the inactive list */
4946 list_for_each_entry_safe(dev_priv
, next_dev
,
4947 &shrink_list
, mm
.shrink_list
) {
4948 struct drm_device
*dev
= dev_priv
->dev
;
4950 if (! mutex_trylock(&dev
->struct_mutex
))
4953 spin_unlock(&shrink_list_lock
);
4955 list_for_each_entry_safe(obj_priv
, next_obj
,
4956 &dev_priv
->mm
.inactive_list
,
4958 if (nr_to_scan
> 0) {
4959 i915_gem_object_unbind(&obj_priv
->base
);
4965 spin_lock(&shrink_list_lock
);
4966 mutex_unlock(&dev
->struct_mutex
);
4975 * We are desperate for pages, so as a last resort, wait
4976 * for the GPU to finish and discard whatever we can.
4977 * This has a dramatic impact to reduce the number of
4978 * OOM-killer events whilst running the GPU aggressively.
4980 list_for_each_entry(dev_priv
, &shrink_list
, mm
.shrink_list
) {
4981 struct drm_device
*dev
= dev_priv
->dev
;
4983 if (!mutex_trylock(&dev
->struct_mutex
))
4986 spin_unlock(&shrink_list_lock
);
4988 if (i915_gpu_is_active(dev
)) {
4993 spin_lock(&shrink_list_lock
);
4994 mutex_unlock(&dev
->struct_mutex
);
5001 spin_unlock(&shrink_list_lock
);
5006 return (cnt
/ 100) * sysctl_vfs_cache_pressure
;
5011 static struct shrinker shrinker
= {
5012 .shrink
= i915_gem_shrink
,
5013 .seeks
= DEFAULT_SEEKS
,
5017 i915_gem_shrinker_init(void)
5019 register_shrinker(&shrinker
);
5023 i915_gem_shrinker_exit(void)
5025 unregister_shrinker(&shrinker
);