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_i915_gem_object
*obj_priv
);
40 static uint32_t i915_gem_get_gtt_size(struct drm_i915_gem_object
*obj_priv
);
42 static int i915_gem_object_flush_gpu_write_domain(struct drm_gem_object
*obj
,
44 static void i915_gem_object_flush_gtt_write_domain(struct drm_gem_object
*obj
);
45 static void i915_gem_object_flush_cpu_write_domain(struct drm_gem_object
*obj
);
46 static int i915_gem_object_set_to_cpu_domain(struct drm_gem_object
*obj
,
48 static int i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object
*obj
,
51 static void i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object
*obj
);
52 static int i915_gem_object_wait_rendering(struct drm_gem_object
*obj
,
54 static int i915_gem_object_bind_to_gtt(struct drm_gem_object
*obj
,
58 static void i915_gem_clear_fence_reg(struct drm_gem_object
*obj
);
59 static int i915_gem_phys_pwrite(struct drm_device
*dev
, struct drm_gem_object
*obj
,
60 struct drm_i915_gem_pwrite
*args
,
61 struct drm_file
*file_priv
);
62 static void i915_gem_free_object_tail(struct drm_gem_object
*obj
);
64 static int i915_gem_inactive_shrink(struct shrinker
*shrinker
,
69 /* some bookkeeping */
70 static void i915_gem_info_add_obj(struct drm_i915_private
*dev_priv
,
73 dev_priv
->mm
.object_count
++;
74 dev_priv
->mm
.object_memory
+= size
;
77 static void i915_gem_info_remove_obj(struct drm_i915_private
*dev_priv
,
80 dev_priv
->mm
.object_count
--;
81 dev_priv
->mm
.object_memory
-= size
;
84 static void i915_gem_info_add_gtt(struct drm_i915_private
*dev_priv
,
85 struct drm_i915_gem_object
*obj
)
87 dev_priv
->mm
.gtt_count
++;
88 dev_priv
->mm
.gtt_memory
+= obj
->gtt_space
->size
;
89 if (obj
->gtt_offset
< dev_priv
->mm
.gtt_mappable_end
) {
90 dev_priv
->mm
.mappable_gtt_used
+=
91 min_t(size_t, obj
->gtt_space
->size
,
92 dev_priv
->mm
.gtt_mappable_end
- obj
->gtt_offset
);
96 static void i915_gem_info_remove_gtt(struct drm_i915_private
*dev_priv
,
97 struct drm_i915_gem_object
*obj
)
99 dev_priv
->mm
.gtt_count
--;
100 dev_priv
->mm
.gtt_memory
-= obj
->gtt_space
->size
;
101 if (obj
->gtt_offset
< dev_priv
->mm
.gtt_mappable_end
) {
102 dev_priv
->mm
.mappable_gtt_used
-=
103 min_t(size_t, obj
->gtt_space
->size
,
104 dev_priv
->mm
.gtt_mappable_end
- obj
->gtt_offset
);
109 * Update the mappable working set counters. Call _only_ when there is a change
110 * in one of (pin|fault)_mappable and update *_mappable _before_ calling.
111 * @mappable: new state the changed mappable flag (either pin_ or fault_).
114 i915_gem_info_update_mappable(struct drm_i915_private
*dev_priv
,
115 struct drm_i915_gem_object
*obj
,
119 if (obj
->pin_mappable
&& obj
->fault_mappable
)
120 /* Combined state was already mappable. */
122 dev_priv
->mm
.gtt_mappable_count
++;
123 dev_priv
->mm
.gtt_mappable_memory
+= obj
->gtt_space
->size
;
125 if (obj
->pin_mappable
|| obj
->fault_mappable
)
126 /* Combined state still mappable. */
128 dev_priv
->mm
.gtt_mappable_count
--;
129 dev_priv
->mm
.gtt_mappable_memory
-= obj
->gtt_space
->size
;
133 static void i915_gem_info_add_pin(struct drm_i915_private
*dev_priv
,
134 struct drm_i915_gem_object
*obj
,
137 dev_priv
->mm
.pin_count
++;
138 dev_priv
->mm
.pin_memory
+= obj
->gtt_space
->size
;
140 obj
->pin_mappable
= true;
141 i915_gem_info_update_mappable(dev_priv
, obj
, true);
145 static void i915_gem_info_remove_pin(struct drm_i915_private
*dev_priv
,
146 struct drm_i915_gem_object
*obj
)
148 dev_priv
->mm
.pin_count
--;
149 dev_priv
->mm
.pin_memory
-= obj
->gtt_space
->size
;
150 if (obj
->pin_mappable
) {
151 obj
->pin_mappable
= false;
152 i915_gem_info_update_mappable(dev_priv
, obj
, false);
157 i915_gem_check_is_wedged(struct drm_device
*dev
)
159 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
160 struct completion
*x
= &dev_priv
->error_completion
;
164 if (!atomic_read(&dev_priv
->mm
.wedged
))
167 ret
= wait_for_completion_interruptible(x
);
171 /* Success, we reset the GPU! */
172 if (!atomic_read(&dev_priv
->mm
.wedged
))
175 /* GPU is hung, bump the completion count to account for
176 * the token we just consumed so that we never hit zero and
177 * end up waiting upon a subsequent completion event that
180 spin_lock_irqsave(&x
->wait
.lock
, flags
);
182 spin_unlock_irqrestore(&x
->wait
.lock
, flags
);
186 static int i915_mutex_lock_interruptible(struct drm_device
*dev
)
188 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
191 ret
= i915_gem_check_is_wedged(dev
);
195 ret
= mutex_lock_interruptible(&dev
->struct_mutex
);
199 if (atomic_read(&dev_priv
->mm
.wedged
)) {
200 mutex_unlock(&dev
->struct_mutex
);
204 WARN_ON(i915_verify_lists(dev
));
209 i915_gem_object_is_inactive(struct drm_i915_gem_object
*obj_priv
)
211 return obj_priv
->gtt_space
&&
213 obj_priv
->pin_count
== 0;
216 int i915_gem_do_init(struct drm_device
*dev
,
218 unsigned long mappable_end
,
221 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
224 (start
& (PAGE_SIZE
- 1)) != 0 ||
225 (end
& (PAGE_SIZE
- 1)) != 0) {
229 drm_mm_init(&dev_priv
->mm
.gtt_space
, start
,
232 dev_priv
->mm
.gtt_total
= end
- start
;
233 dev_priv
->mm
.mappable_gtt_total
= min(end
, mappable_end
) - start
;
234 dev_priv
->mm
.gtt_mappable_end
= mappable_end
;
240 i915_gem_init_ioctl(struct drm_device
*dev
, void *data
,
241 struct drm_file
*file_priv
)
243 struct drm_i915_gem_init
*args
= data
;
246 mutex_lock(&dev
->struct_mutex
);
247 ret
= i915_gem_do_init(dev
, args
->gtt_start
, args
->gtt_end
, args
->gtt_end
);
248 mutex_unlock(&dev
->struct_mutex
);
254 i915_gem_get_aperture_ioctl(struct drm_device
*dev
, void *data
,
255 struct drm_file
*file_priv
)
257 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
258 struct drm_i915_gem_get_aperture
*args
= data
;
260 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
263 mutex_lock(&dev
->struct_mutex
);
264 args
->aper_size
= dev_priv
->mm
.gtt_total
;
265 args
->aper_available_size
= args
->aper_size
- dev_priv
->mm
.pin_memory
;
266 mutex_unlock(&dev
->struct_mutex
);
273 * Creates a new mm object and returns a handle to it.
276 i915_gem_create_ioctl(struct drm_device
*dev
, void *data
,
277 struct drm_file
*file_priv
)
279 struct drm_i915_gem_create
*args
= data
;
280 struct drm_gem_object
*obj
;
284 args
->size
= roundup(args
->size
, PAGE_SIZE
);
286 /* Allocate the new object */
287 obj
= i915_gem_alloc_object(dev
, args
->size
);
291 ret
= drm_gem_handle_create(file_priv
, obj
, &handle
);
293 drm_gem_object_release(obj
);
294 i915_gem_info_remove_obj(dev
->dev_private
, obj
->size
);
299 /* drop reference from allocate - handle holds it now */
300 drm_gem_object_unreference(obj
);
301 trace_i915_gem_object_create(obj
);
303 args
->handle
= handle
;
307 static int i915_gem_object_needs_bit17_swizzle(struct drm_gem_object
*obj
)
309 drm_i915_private_t
*dev_priv
= obj
->dev
->dev_private
;
310 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
312 return dev_priv
->mm
.bit_6_swizzle_x
== I915_BIT_6_SWIZZLE_9_10_17
&&
313 obj_priv
->tiling_mode
!= I915_TILING_NONE
;
317 slow_shmem_copy(struct page
*dst_page
,
319 struct page
*src_page
,
323 char *dst_vaddr
, *src_vaddr
;
325 dst_vaddr
= kmap(dst_page
);
326 src_vaddr
= kmap(src_page
);
328 memcpy(dst_vaddr
+ dst_offset
, src_vaddr
+ src_offset
, length
);
335 slow_shmem_bit17_copy(struct page
*gpu_page
,
337 struct page
*cpu_page
,
342 char *gpu_vaddr
, *cpu_vaddr
;
344 /* Use the unswizzled path if this page isn't affected. */
345 if ((page_to_phys(gpu_page
) & (1 << 17)) == 0) {
347 return slow_shmem_copy(cpu_page
, cpu_offset
,
348 gpu_page
, gpu_offset
, length
);
350 return slow_shmem_copy(gpu_page
, gpu_offset
,
351 cpu_page
, cpu_offset
, length
);
354 gpu_vaddr
= kmap(gpu_page
);
355 cpu_vaddr
= kmap(cpu_page
);
357 /* Copy the data, XORing A6 with A17 (1). The user already knows he's
358 * XORing with the other bits (A9 for Y, A9 and A10 for X)
361 int cacheline_end
= ALIGN(gpu_offset
+ 1, 64);
362 int this_length
= min(cacheline_end
- gpu_offset
, length
);
363 int swizzled_gpu_offset
= gpu_offset
^ 64;
366 memcpy(cpu_vaddr
+ cpu_offset
,
367 gpu_vaddr
+ swizzled_gpu_offset
,
370 memcpy(gpu_vaddr
+ swizzled_gpu_offset
,
371 cpu_vaddr
+ cpu_offset
,
374 cpu_offset
+= this_length
;
375 gpu_offset
+= this_length
;
376 length
-= this_length
;
384 * This is the fast shmem pread path, which attempts to copy_from_user directly
385 * from the backing pages of the object to the user's address space. On a
386 * fault, it fails so we can fall back to i915_gem_shmem_pwrite_slow().
389 i915_gem_shmem_pread_fast(struct drm_device
*dev
, struct drm_gem_object
*obj
,
390 struct drm_i915_gem_pread
*args
,
391 struct drm_file
*file_priv
)
393 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
394 struct address_space
*mapping
= obj
->filp
->f_path
.dentry
->d_inode
->i_mapping
;
397 char __user
*user_data
;
398 int page_offset
, page_length
;
400 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
403 obj_priv
= to_intel_bo(obj
);
404 offset
= args
->offset
;
411 /* Operation in this page
413 * page_offset = offset within page
414 * page_length = bytes to copy for this page
416 page_offset
= offset
& (PAGE_SIZE
-1);
417 page_length
= remain
;
418 if ((page_offset
+ remain
) > PAGE_SIZE
)
419 page_length
= PAGE_SIZE
- page_offset
;
421 page
= read_cache_page_gfp(mapping
, offset
>> PAGE_SHIFT
,
422 GFP_HIGHUSER
| __GFP_RECLAIMABLE
);
424 return PTR_ERR(page
);
426 vaddr
= kmap_atomic(page
);
427 ret
= __copy_to_user_inatomic(user_data
,
430 kunmap_atomic(vaddr
);
432 mark_page_accessed(page
);
433 page_cache_release(page
);
437 remain
-= page_length
;
438 user_data
+= page_length
;
439 offset
+= page_length
;
446 * This is the fallback shmem pread path, which allocates temporary storage
447 * in kernel space to copy_to_user into outside of the struct_mutex, so we
448 * can copy out of the object's backing pages while holding the struct mutex
449 * and not take page faults.
452 i915_gem_shmem_pread_slow(struct drm_device
*dev
, struct drm_gem_object
*obj
,
453 struct drm_i915_gem_pread
*args
,
454 struct drm_file
*file_priv
)
456 struct address_space
*mapping
= obj
->filp
->f_path
.dentry
->d_inode
->i_mapping
;
457 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
458 struct mm_struct
*mm
= current
->mm
;
459 struct page
**user_pages
;
461 loff_t offset
, pinned_pages
, i
;
462 loff_t first_data_page
, last_data_page
, num_pages
;
463 int shmem_page_offset
;
464 int data_page_index
, data_page_offset
;
467 uint64_t data_ptr
= args
->data_ptr
;
468 int do_bit17_swizzling
;
472 /* Pin the user pages containing the data. We can't fault while
473 * holding the struct mutex, yet we want to hold it while
474 * dereferencing the user data.
476 first_data_page
= data_ptr
/ PAGE_SIZE
;
477 last_data_page
= (data_ptr
+ args
->size
- 1) / PAGE_SIZE
;
478 num_pages
= last_data_page
- first_data_page
+ 1;
480 user_pages
= drm_malloc_ab(num_pages
, sizeof(struct page
*));
481 if (user_pages
== NULL
)
484 mutex_unlock(&dev
->struct_mutex
);
485 down_read(&mm
->mmap_sem
);
486 pinned_pages
= get_user_pages(current
, mm
, (uintptr_t)args
->data_ptr
,
487 num_pages
, 1, 0, user_pages
, NULL
);
488 up_read(&mm
->mmap_sem
);
489 mutex_lock(&dev
->struct_mutex
);
490 if (pinned_pages
< num_pages
) {
495 ret
= i915_gem_object_set_cpu_read_domain_range(obj
,
501 do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
503 obj_priv
= to_intel_bo(obj
);
504 offset
= args
->offset
;
509 /* Operation in this page
511 * shmem_page_offset = offset within page in shmem file
512 * data_page_index = page number in get_user_pages return
513 * data_page_offset = offset with data_page_index page.
514 * page_length = bytes to copy for this page
516 shmem_page_offset
= offset
& ~PAGE_MASK
;
517 data_page_index
= data_ptr
/ PAGE_SIZE
- first_data_page
;
518 data_page_offset
= data_ptr
& ~PAGE_MASK
;
520 page_length
= remain
;
521 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
522 page_length
= PAGE_SIZE
- shmem_page_offset
;
523 if ((data_page_offset
+ page_length
) > PAGE_SIZE
)
524 page_length
= PAGE_SIZE
- data_page_offset
;
526 page
= read_cache_page_gfp(mapping
, offset
>> PAGE_SHIFT
,
527 GFP_HIGHUSER
| __GFP_RECLAIMABLE
);
529 return PTR_ERR(page
);
531 if (do_bit17_swizzling
) {
532 slow_shmem_bit17_copy(page
,
534 user_pages
[data_page_index
],
539 slow_shmem_copy(user_pages
[data_page_index
],
546 mark_page_accessed(page
);
547 page_cache_release(page
);
549 remain
-= page_length
;
550 data_ptr
+= page_length
;
551 offset
+= page_length
;
555 for (i
= 0; i
< pinned_pages
; i
++) {
556 SetPageDirty(user_pages
[i
]);
557 mark_page_accessed(user_pages
[i
]);
558 page_cache_release(user_pages
[i
]);
560 drm_free_large(user_pages
);
566 * Reads data from the object referenced by handle.
568 * On error, the contents of *data are undefined.
571 i915_gem_pread_ioctl(struct drm_device
*dev
, void *data
,
572 struct drm_file
*file_priv
)
574 struct drm_i915_gem_pread
*args
= data
;
575 struct drm_gem_object
*obj
;
576 struct drm_i915_gem_object
*obj_priv
;
579 ret
= i915_mutex_lock_interruptible(dev
);
583 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
588 obj_priv
= to_intel_bo(obj
);
590 /* Bounds check source. */
591 if (args
->offset
> obj
->size
|| args
->size
> obj
->size
- args
->offset
) {
599 if (!access_ok(VERIFY_WRITE
,
600 (char __user
*)(uintptr_t)args
->data_ptr
,
606 ret
= fault_in_pages_writeable((char __user
*)(uintptr_t)args
->data_ptr
,
613 ret
= i915_gem_object_set_cpu_read_domain_range(obj
,
620 if (!i915_gem_object_needs_bit17_swizzle(obj
))
621 ret
= i915_gem_shmem_pread_fast(dev
, obj
, args
, file_priv
);
623 ret
= i915_gem_shmem_pread_slow(dev
, obj
, args
, file_priv
);
626 drm_gem_object_unreference(obj
);
628 mutex_unlock(&dev
->struct_mutex
);
632 /* This is the fast write path which cannot handle
633 * page faults in the source data
637 fast_user_write(struct io_mapping
*mapping
,
638 loff_t page_base
, int page_offset
,
639 char __user
*user_data
,
643 unsigned long unwritten
;
645 vaddr_atomic
= io_mapping_map_atomic_wc(mapping
, page_base
);
646 unwritten
= __copy_from_user_inatomic_nocache(vaddr_atomic
+ page_offset
,
648 io_mapping_unmap_atomic(vaddr_atomic
);
652 /* Here's the write path which can sleep for
657 slow_kernel_write(struct io_mapping
*mapping
,
658 loff_t gtt_base
, int gtt_offset
,
659 struct page
*user_page
, int user_offset
,
662 char __iomem
*dst_vaddr
;
665 dst_vaddr
= io_mapping_map_wc(mapping
, gtt_base
);
666 src_vaddr
= kmap(user_page
);
668 memcpy_toio(dst_vaddr
+ gtt_offset
,
669 src_vaddr
+ user_offset
,
673 io_mapping_unmap(dst_vaddr
);
677 * This is the fast pwrite path, where we copy the data directly from the
678 * user into the GTT, uncached.
681 i915_gem_gtt_pwrite_fast(struct drm_device
*dev
, struct drm_gem_object
*obj
,
682 struct drm_i915_gem_pwrite
*args
,
683 struct drm_file
*file_priv
)
685 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
686 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
688 loff_t offset
, page_base
;
689 char __user
*user_data
;
690 int page_offset
, page_length
;
692 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
695 obj_priv
= to_intel_bo(obj
);
696 offset
= obj_priv
->gtt_offset
+ args
->offset
;
699 /* Operation in this page
701 * page_base = page offset within aperture
702 * page_offset = offset within page
703 * page_length = bytes to copy for this page
705 page_base
= (offset
& ~(PAGE_SIZE
-1));
706 page_offset
= offset
& (PAGE_SIZE
-1);
707 page_length
= remain
;
708 if ((page_offset
+ remain
) > PAGE_SIZE
)
709 page_length
= PAGE_SIZE
- page_offset
;
711 /* If we get a fault while copying data, then (presumably) our
712 * source page isn't available. Return the error and we'll
713 * retry in the slow path.
715 if (fast_user_write(dev_priv
->mm
.gtt_mapping
, page_base
,
716 page_offset
, user_data
, page_length
))
720 remain
-= page_length
;
721 user_data
+= page_length
;
722 offset
+= page_length
;
729 * This is the fallback GTT pwrite path, which uses get_user_pages to pin
730 * the memory and maps it using kmap_atomic for copying.
732 * This code resulted in x11perf -rgb10text consuming about 10% more CPU
733 * than using i915_gem_gtt_pwrite_fast on a G45 (32-bit).
736 i915_gem_gtt_pwrite_slow(struct drm_device
*dev
, struct drm_gem_object
*obj
,
737 struct drm_i915_gem_pwrite
*args
,
738 struct drm_file
*file_priv
)
740 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
741 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
743 loff_t gtt_page_base
, offset
;
744 loff_t first_data_page
, last_data_page
, num_pages
;
745 loff_t pinned_pages
, i
;
746 struct page
**user_pages
;
747 struct mm_struct
*mm
= current
->mm
;
748 int gtt_page_offset
, data_page_offset
, data_page_index
, page_length
;
750 uint64_t data_ptr
= args
->data_ptr
;
754 /* Pin the user pages containing the data. We can't fault while
755 * holding the struct mutex, and all of the pwrite implementations
756 * want to hold it while dereferencing the user data.
758 first_data_page
= data_ptr
/ PAGE_SIZE
;
759 last_data_page
= (data_ptr
+ args
->size
- 1) / PAGE_SIZE
;
760 num_pages
= last_data_page
- first_data_page
+ 1;
762 user_pages
= drm_malloc_ab(num_pages
, sizeof(struct page
*));
763 if (user_pages
== NULL
)
766 mutex_unlock(&dev
->struct_mutex
);
767 down_read(&mm
->mmap_sem
);
768 pinned_pages
= get_user_pages(current
, mm
, (uintptr_t)args
->data_ptr
,
769 num_pages
, 0, 0, user_pages
, NULL
);
770 up_read(&mm
->mmap_sem
);
771 mutex_lock(&dev
->struct_mutex
);
772 if (pinned_pages
< num_pages
) {
774 goto out_unpin_pages
;
777 ret
= i915_gem_object_set_to_gtt_domain(obj
, 1);
779 goto out_unpin_pages
;
781 obj_priv
= to_intel_bo(obj
);
782 offset
= obj_priv
->gtt_offset
+ args
->offset
;
785 /* Operation in this page
787 * gtt_page_base = page offset within aperture
788 * gtt_page_offset = offset within page in aperture
789 * data_page_index = page number in get_user_pages return
790 * data_page_offset = offset with data_page_index page.
791 * page_length = bytes to copy for this page
793 gtt_page_base
= offset
& PAGE_MASK
;
794 gtt_page_offset
= offset
& ~PAGE_MASK
;
795 data_page_index
= data_ptr
/ PAGE_SIZE
- first_data_page
;
796 data_page_offset
= data_ptr
& ~PAGE_MASK
;
798 page_length
= remain
;
799 if ((gtt_page_offset
+ page_length
) > PAGE_SIZE
)
800 page_length
= PAGE_SIZE
- gtt_page_offset
;
801 if ((data_page_offset
+ page_length
) > PAGE_SIZE
)
802 page_length
= PAGE_SIZE
- data_page_offset
;
804 slow_kernel_write(dev_priv
->mm
.gtt_mapping
,
805 gtt_page_base
, gtt_page_offset
,
806 user_pages
[data_page_index
],
810 remain
-= page_length
;
811 offset
+= page_length
;
812 data_ptr
+= page_length
;
816 for (i
= 0; i
< pinned_pages
; i
++)
817 page_cache_release(user_pages
[i
]);
818 drm_free_large(user_pages
);
824 * This is the fast shmem pwrite path, which attempts to directly
825 * copy_from_user into the kmapped pages backing the object.
828 i915_gem_shmem_pwrite_fast(struct drm_device
*dev
, struct drm_gem_object
*obj
,
829 struct drm_i915_gem_pwrite
*args
,
830 struct drm_file
*file_priv
)
832 struct address_space
*mapping
= obj
->filp
->f_path
.dentry
->d_inode
->i_mapping
;
833 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
836 char __user
*user_data
;
837 int page_offset
, page_length
;
839 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
842 obj_priv
= to_intel_bo(obj
);
843 offset
= args
->offset
;
851 /* Operation in this page
853 * page_offset = offset within page
854 * page_length = bytes to copy for this page
856 page_offset
= offset
& (PAGE_SIZE
-1);
857 page_length
= remain
;
858 if ((page_offset
+ remain
) > PAGE_SIZE
)
859 page_length
= PAGE_SIZE
- page_offset
;
861 page
= read_cache_page_gfp(mapping
, offset
>> PAGE_SHIFT
,
862 GFP_HIGHUSER
| __GFP_RECLAIMABLE
);
864 return PTR_ERR(page
);
866 vaddr
= kmap_atomic(page
, KM_USER0
);
867 ret
= __copy_from_user_inatomic(vaddr
+ page_offset
,
870 kunmap_atomic(vaddr
, KM_USER0
);
872 set_page_dirty(page
);
873 mark_page_accessed(page
);
874 page_cache_release(page
);
876 /* If we get a fault while copying data, then (presumably) our
877 * source page isn't available. Return the error and we'll
878 * retry in the slow path.
883 remain
-= page_length
;
884 user_data
+= page_length
;
885 offset
+= page_length
;
892 * This is the fallback shmem pwrite path, which uses get_user_pages to pin
893 * the memory and maps it using kmap_atomic for copying.
895 * This avoids taking mmap_sem for faulting on the user's address while the
896 * struct_mutex is held.
899 i915_gem_shmem_pwrite_slow(struct drm_device
*dev
, struct drm_gem_object
*obj
,
900 struct drm_i915_gem_pwrite
*args
,
901 struct drm_file
*file_priv
)
903 struct address_space
*mapping
= obj
->filp
->f_path
.dentry
->d_inode
->i_mapping
;
904 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
905 struct mm_struct
*mm
= current
->mm
;
906 struct page
**user_pages
;
908 loff_t offset
, pinned_pages
, i
;
909 loff_t first_data_page
, last_data_page
, num_pages
;
910 int shmem_page_offset
;
911 int data_page_index
, data_page_offset
;
914 uint64_t data_ptr
= args
->data_ptr
;
915 int do_bit17_swizzling
;
919 /* Pin the user pages containing the data. We can't fault while
920 * holding the struct mutex, and all of the pwrite implementations
921 * want to hold it while dereferencing the user data.
923 first_data_page
= data_ptr
/ PAGE_SIZE
;
924 last_data_page
= (data_ptr
+ args
->size
- 1) / PAGE_SIZE
;
925 num_pages
= last_data_page
- first_data_page
+ 1;
927 user_pages
= drm_malloc_ab(num_pages
, sizeof(struct page
*));
928 if (user_pages
== NULL
)
931 mutex_unlock(&dev
->struct_mutex
);
932 down_read(&mm
->mmap_sem
);
933 pinned_pages
= get_user_pages(current
, mm
, (uintptr_t)args
->data_ptr
,
934 num_pages
, 0, 0, user_pages
, NULL
);
935 up_read(&mm
->mmap_sem
);
936 mutex_lock(&dev
->struct_mutex
);
937 if (pinned_pages
< num_pages
) {
942 ret
= i915_gem_object_set_to_cpu_domain(obj
, 1);
946 do_bit17_swizzling
= i915_gem_object_needs_bit17_swizzle(obj
);
948 obj_priv
= to_intel_bo(obj
);
949 offset
= args
->offset
;
955 /* Operation in this page
957 * shmem_page_offset = offset within page in shmem file
958 * data_page_index = page number in get_user_pages return
959 * data_page_offset = offset with data_page_index page.
960 * page_length = bytes to copy for this page
962 shmem_page_offset
= offset
& ~PAGE_MASK
;
963 data_page_index
= data_ptr
/ PAGE_SIZE
- first_data_page
;
964 data_page_offset
= data_ptr
& ~PAGE_MASK
;
966 page_length
= remain
;
967 if ((shmem_page_offset
+ page_length
) > PAGE_SIZE
)
968 page_length
= PAGE_SIZE
- shmem_page_offset
;
969 if ((data_page_offset
+ page_length
) > PAGE_SIZE
)
970 page_length
= PAGE_SIZE
- data_page_offset
;
972 page
= read_cache_page_gfp(mapping
, offset
>> PAGE_SHIFT
,
973 GFP_HIGHUSER
| __GFP_RECLAIMABLE
);
979 if (do_bit17_swizzling
) {
980 slow_shmem_bit17_copy(page
,
982 user_pages
[data_page_index
],
987 slow_shmem_copy(page
,
989 user_pages
[data_page_index
],
994 set_page_dirty(page
);
995 mark_page_accessed(page
);
996 page_cache_release(page
);
998 remain
-= page_length
;
999 data_ptr
+= page_length
;
1000 offset
+= page_length
;
1004 for (i
= 0; i
< pinned_pages
; i
++)
1005 page_cache_release(user_pages
[i
]);
1006 drm_free_large(user_pages
);
1012 * Writes data to the object referenced by handle.
1014 * On error, the contents of the buffer that were to be modified are undefined.
1017 i915_gem_pwrite_ioctl(struct drm_device
*dev
, void *data
,
1018 struct drm_file
*file
)
1020 struct drm_i915_gem_pwrite
*args
= data
;
1021 struct drm_gem_object
*obj
;
1022 struct drm_i915_gem_object
*obj_priv
;
1025 ret
= i915_mutex_lock_interruptible(dev
);
1029 obj
= drm_gem_object_lookup(dev
, file
, args
->handle
);
1034 obj_priv
= to_intel_bo(obj
);
1037 /* Bounds check destination. */
1038 if (args
->offset
> obj
->size
|| args
->size
> obj
->size
- args
->offset
) {
1043 if (args
->size
== 0)
1046 if (!access_ok(VERIFY_READ
,
1047 (char __user
*)(uintptr_t)args
->data_ptr
,
1053 ret
= fault_in_pages_readable((char __user
*)(uintptr_t)args
->data_ptr
,
1060 /* We can only do the GTT pwrite on untiled buffers, as otherwise
1061 * it would end up going through the fenced access, and we'll get
1062 * different detiling behavior between reading and writing.
1063 * pread/pwrite currently are reading and writing from the CPU
1064 * perspective, requiring manual detiling by the client.
1066 if (obj_priv
->phys_obj
)
1067 ret
= i915_gem_phys_pwrite(dev
, obj
, args
, file
);
1068 else if (obj_priv
->tiling_mode
== I915_TILING_NONE
&&
1069 obj_priv
->gtt_space
&&
1070 obj
->write_domain
!= I915_GEM_DOMAIN_CPU
) {
1071 ret
= i915_gem_object_pin(obj
, 0, true, false);
1075 ret
= i915_gem_object_set_to_gtt_domain(obj
, 1);
1079 ret
= i915_gem_gtt_pwrite_fast(dev
, obj
, args
, file
);
1081 ret
= i915_gem_gtt_pwrite_slow(dev
, obj
, args
, file
);
1084 i915_gem_object_unpin(obj
);
1086 ret
= i915_gem_object_set_to_cpu_domain(obj
, 1);
1091 if (!i915_gem_object_needs_bit17_swizzle(obj
))
1092 ret
= i915_gem_shmem_pwrite_fast(dev
, obj
, args
, file
);
1094 ret
= i915_gem_shmem_pwrite_slow(dev
, obj
, args
, file
);
1098 drm_gem_object_unreference(obj
);
1100 mutex_unlock(&dev
->struct_mutex
);
1105 * Called when user space prepares to use an object with the CPU, either
1106 * through the mmap ioctl's mapping or a GTT mapping.
1109 i915_gem_set_domain_ioctl(struct drm_device
*dev
, void *data
,
1110 struct drm_file
*file_priv
)
1112 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1113 struct drm_i915_gem_set_domain
*args
= data
;
1114 struct drm_gem_object
*obj
;
1115 struct drm_i915_gem_object
*obj_priv
;
1116 uint32_t read_domains
= args
->read_domains
;
1117 uint32_t write_domain
= args
->write_domain
;
1120 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
1123 /* Only handle setting domains to types used by the CPU. */
1124 if (write_domain
& I915_GEM_GPU_DOMAINS
)
1127 if (read_domains
& I915_GEM_GPU_DOMAINS
)
1130 /* Having something in the write domain implies it's in the read
1131 * domain, and only that read domain. Enforce that in the request.
1133 if (write_domain
!= 0 && read_domains
!= write_domain
)
1136 ret
= i915_mutex_lock_interruptible(dev
);
1140 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
1145 obj_priv
= to_intel_bo(obj
);
1147 intel_mark_busy(dev
, obj
);
1149 if (read_domains
& I915_GEM_DOMAIN_GTT
) {
1150 ret
= i915_gem_object_set_to_gtt_domain(obj
, write_domain
!= 0);
1152 /* Update the LRU on the fence for the CPU access that's
1155 if (obj_priv
->fence_reg
!= I915_FENCE_REG_NONE
) {
1156 struct drm_i915_fence_reg
*reg
=
1157 &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
1158 list_move_tail(®
->lru_list
,
1159 &dev_priv
->mm
.fence_list
);
1162 /* Silently promote "you're not bound, there was nothing to do"
1163 * to success, since the client was just asking us to
1164 * make sure everything was done.
1169 ret
= i915_gem_object_set_to_cpu_domain(obj
, write_domain
!= 0);
1172 /* Maintain LRU order of "inactive" objects */
1173 if (ret
== 0 && i915_gem_object_is_inactive(obj_priv
))
1174 list_move_tail(&obj_priv
->mm_list
, &dev_priv
->mm
.inactive_list
);
1176 drm_gem_object_unreference(obj
);
1178 mutex_unlock(&dev
->struct_mutex
);
1183 * Called when user space has done writes to this buffer
1186 i915_gem_sw_finish_ioctl(struct drm_device
*dev
, void *data
,
1187 struct drm_file
*file_priv
)
1189 struct drm_i915_gem_sw_finish
*args
= data
;
1190 struct drm_gem_object
*obj
;
1193 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
1196 ret
= i915_mutex_lock_interruptible(dev
);
1200 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
1206 /* Pinned buffers may be scanout, so flush the cache */
1207 if (to_intel_bo(obj
)->pin_count
)
1208 i915_gem_object_flush_cpu_write_domain(obj
);
1210 drm_gem_object_unreference(obj
);
1212 mutex_unlock(&dev
->struct_mutex
);
1217 * Maps the contents of an object, returning the address it is mapped
1220 * While the mapping holds a reference on the contents of the object, it doesn't
1221 * imply a ref on the object itself.
1224 i915_gem_mmap_ioctl(struct drm_device
*dev
, void *data
,
1225 struct drm_file
*file_priv
)
1227 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1228 struct drm_i915_gem_mmap
*args
= data
;
1229 struct drm_gem_object
*obj
;
1233 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
1236 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
1240 if (obj
->size
> dev_priv
->mm
.gtt_mappable_end
) {
1241 drm_gem_object_unreference_unlocked(obj
);
1245 offset
= args
->offset
;
1247 down_write(¤t
->mm
->mmap_sem
);
1248 addr
= do_mmap(obj
->filp
, 0, args
->size
,
1249 PROT_READ
| PROT_WRITE
, MAP_SHARED
,
1251 up_write(¤t
->mm
->mmap_sem
);
1252 drm_gem_object_unreference_unlocked(obj
);
1253 if (IS_ERR((void *)addr
))
1256 args
->addr_ptr
= (uint64_t) addr
;
1262 * i915_gem_fault - fault a page into the GTT
1263 * vma: VMA in question
1266 * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped
1267 * from userspace. The fault handler takes care of binding the object to
1268 * the GTT (if needed), allocating and programming a fence register (again,
1269 * only if needed based on whether the old reg is still valid or the object
1270 * is tiled) and inserting a new PTE into the faulting process.
1272 * Note that the faulting process may involve evicting existing objects
1273 * from the GTT and/or fence registers to make room. So performance may
1274 * suffer if the GTT working set is large or there are few fence registers
1277 int i915_gem_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
1279 struct drm_gem_object
*obj
= vma
->vm_private_data
;
1280 struct drm_device
*dev
= obj
->dev
;
1281 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1282 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1283 pgoff_t page_offset
;
1286 bool write
= !!(vmf
->flags
& FAULT_FLAG_WRITE
);
1288 /* We don't use vmf->pgoff since that has the fake offset */
1289 page_offset
= ((unsigned long)vmf
->virtual_address
- vma
->vm_start
) >>
1292 /* Now bind it into the GTT if needed */
1293 mutex_lock(&dev
->struct_mutex
);
1294 BUG_ON(obj_priv
->pin_count
&& !obj_priv
->pin_mappable
);
1296 if (obj_priv
->gtt_space
) {
1297 if (!obj_priv
->mappable
||
1298 (obj_priv
->tiling_mode
&& !obj_priv
->fenceable
)) {
1299 ret
= i915_gem_object_unbind(obj
);
1305 if (!obj_priv
->gtt_space
) {
1306 ret
= i915_gem_object_bind_to_gtt(obj
, 0,
1307 true, obj_priv
->tiling_mode
);
1312 ret
= i915_gem_object_set_to_gtt_domain(obj
, write
);
1316 if (!obj_priv
->fault_mappable
) {
1317 obj_priv
->fault_mappable
= true;
1318 i915_gem_info_update_mappable(dev_priv
, obj_priv
, true);
1321 /* Need a new fence register? */
1322 if (obj_priv
->tiling_mode
!= I915_TILING_NONE
) {
1323 ret
= i915_gem_object_get_fence_reg(obj
, true);
1328 if (i915_gem_object_is_inactive(obj_priv
))
1329 list_move_tail(&obj_priv
->mm_list
, &dev_priv
->mm
.inactive_list
);
1331 pfn
= ((dev
->agp
->base
+ obj_priv
->gtt_offset
) >> PAGE_SHIFT
) +
1334 /* Finally, remap it using the new GTT offset */
1335 ret
= vm_insert_pfn(vma
, (unsigned long)vmf
->virtual_address
, pfn
);
1337 mutex_unlock(&dev
->struct_mutex
);
1342 return VM_FAULT_NOPAGE
;
1345 return VM_FAULT_OOM
;
1347 return VM_FAULT_SIGBUS
;
1352 * i915_gem_create_mmap_offset - create a fake mmap offset for an object
1353 * @obj: obj in question
1355 * GEM memory mapping works by handing back to userspace a fake mmap offset
1356 * it can use in a subsequent mmap(2) call. The DRM core code then looks
1357 * up the object based on the offset and sets up the various memory mapping
1360 * This routine allocates and attaches a fake offset for @obj.
1363 i915_gem_create_mmap_offset(struct drm_gem_object
*obj
)
1365 struct drm_device
*dev
= obj
->dev
;
1366 struct drm_gem_mm
*mm
= dev
->mm_private
;
1367 struct drm_map_list
*list
;
1368 struct drm_local_map
*map
;
1371 /* Set the object up for mmap'ing */
1372 list
= &obj
->map_list
;
1373 list
->map
= kzalloc(sizeof(struct drm_map_list
), GFP_KERNEL
);
1378 map
->type
= _DRM_GEM
;
1379 map
->size
= obj
->size
;
1382 /* Get a DRM GEM mmap offset allocated... */
1383 list
->file_offset_node
= drm_mm_search_free(&mm
->offset_manager
,
1384 obj
->size
/ PAGE_SIZE
, 0, 0);
1385 if (!list
->file_offset_node
) {
1386 DRM_ERROR("failed to allocate offset for bo %d\n", obj
->name
);
1391 list
->file_offset_node
= drm_mm_get_block(list
->file_offset_node
,
1392 obj
->size
/ PAGE_SIZE
, 0);
1393 if (!list
->file_offset_node
) {
1398 list
->hash
.key
= list
->file_offset_node
->start
;
1399 ret
= drm_ht_insert_item(&mm
->offset_hash
, &list
->hash
);
1401 DRM_ERROR("failed to add to map hash\n");
1408 drm_mm_put_block(list
->file_offset_node
);
1417 * i915_gem_release_mmap - remove physical page mappings
1418 * @obj: obj in question
1420 * Preserve the reservation of the mmapping with the DRM core code, but
1421 * relinquish ownership of the pages back to the system.
1423 * It is vital that we remove the page mapping if we have mapped a tiled
1424 * object through the GTT and then lose the fence register due to
1425 * resource pressure. Similarly if the object has been moved out of the
1426 * aperture, than pages mapped into userspace must be revoked. Removing the
1427 * mapping will then trigger a page fault on the next user access, allowing
1428 * fixup by i915_gem_fault().
1431 i915_gem_release_mmap(struct drm_gem_object
*obj
)
1433 struct drm_device
*dev
= obj
->dev
;
1434 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1435 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1437 if (unlikely(obj
->map_list
.map
&& dev
->dev_mapping
))
1438 unmap_mapping_range(dev
->dev_mapping
,
1439 (loff_t
)obj
->map_list
.hash
.key
<<PAGE_SHIFT
,
1442 if (obj_priv
->fault_mappable
) {
1443 obj_priv
->fault_mappable
= false;
1444 i915_gem_info_update_mappable(dev_priv
, obj_priv
, false);
1449 i915_gem_free_mmap_offset(struct drm_gem_object
*obj
)
1451 struct drm_device
*dev
= obj
->dev
;
1452 struct drm_gem_mm
*mm
= dev
->mm_private
;
1453 struct drm_map_list
*list
= &obj
->map_list
;
1455 drm_ht_remove_item(&mm
->offset_hash
, &list
->hash
);
1456 drm_mm_put_block(list
->file_offset_node
);
1462 * i915_gem_get_gtt_alignment - return required GTT alignment for an object
1463 * @obj: object to check
1465 * Return the required GTT alignment for an object, taking into account
1466 * potential fence register mapping if needed.
1469 i915_gem_get_gtt_alignment(struct drm_i915_gem_object
*obj_priv
)
1471 struct drm_device
*dev
= obj_priv
->base
.dev
;
1474 * Minimum alignment is 4k (GTT page size), but might be greater
1475 * if a fence register is needed for the object.
1477 if (INTEL_INFO(dev
)->gen
>= 4 ||
1478 obj_priv
->tiling_mode
== I915_TILING_NONE
)
1482 * Previous chips need to be aligned to the size of the smallest
1483 * fence register that can contain the object.
1485 return i915_gem_get_gtt_size(obj_priv
);
1489 i915_gem_get_gtt_size(struct drm_i915_gem_object
*obj_priv
)
1491 struct drm_device
*dev
= obj_priv
->base
.dev
;
1495 * Minimum alignment is 4k (GTT page size), but might be greater
1496 * if a fence register is needed for the object.
1498 if (INTEL_INFO(dev
)->gen
>= 4)
1499 return obj_priv
->base
.size
;
1502 * Previous chips need to be aligned to the size of the smallest
1503 * fence register that can contain the object.
1505 if (INTEL_INFO(dev
)->gen
== 3)
1510 while (size
< obj_priv
->base
.size
)
1517 * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing
1519 * @data: GTT mapping ioctl data
1520 * @file_priv: GEM object info
1522 * Simply returns the fake offset to userspace so it can mmap it.
1523 * The mmap call will end up in drm_gem_mmap(), which will set things
1524 * up so we can get faults in the handler above.
1526 * The fault handler will take care of binding the object into the GTT
1527 * (since it may have been evicted to make room for something), allocating
1528 * a fence register, and mapping the appropriate aperture address into
1532 i915_gem_mmap_gtt_ioctl(struct drm_device
*dev
, void *data
,
1533 struct drm_file
*file_priv
)
1535 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1536 struct drm_i915_gem_mmap_gtt
*args
= data
;
1537 struct drm_gem_object
*obj
;
1538 struct drm_i915_gem_object
*obj_priv
;
1541 if (!(dev
->driver
->driver_features
& DRIVER_GEM
))
1544 ret
= i915_mutex_lock_interruptible(dev
);
1548 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
1553 obj_priv
= to_intel_bo(obj
);
1555 if (obj
->size
> dev_priv
->mm
.gtt_mappable_end
) {
1560 if (obj_priv
->madv
!= I915_MADV_WILLNEED
) {
1561 DRM_ERROR("Attempting to mmap a purgeable buffer\n");
1566 if (!obj
->map_list
.map
) {
1567 ret
= i915_gem_create_mmap_offset(obj
);
1572 args
->offset
= (u64
)obj
->map_list
.hash
.key
<< PAGE_SHIFT
;
1575 drm_gem_object_unreference(obj
);
1577 mutex_unlock(&dev
->struct_mutex
);
1582 i915_gem_object_get_pages_gtt(struct drm_gem_object
*obj
,
1585 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1587 struct address_space
*mapping
;
1588 struct inode
*inode
;
1591 /* Get the list of pages out of our struct file. They'll be pinned
1592 * at this point until we release them.
1594 page_count
= obj
->size
/ PAGE_SIZE
;
1595 BUG_ON(obj_priv
->pages
!= NULL
);
1596 obj_priv
->pages
= drm_malloc_ab(page_count
, sizeof(struct page
*));
1597 if (obj_priv
->pages
== NULL
)
1600 inode
= obj
->filp
->f_path
.dentry
->d_inode
;
1601 mapping
= inode
->i_mapping
;
1602 for (i
= 0; i
< page_count
; i
++) {
1603 page
= read_cache_page_gfp(mapping
, i
,
1611 obj_priv
->pages
[i
] = page
;
1614 if (obj_priv
->tiling_mode
!= I915_TILING_NONE
)
1615 i915_gem_object_do_bit_17_swizzle(obj
);
1621 page_cache_release(obj_priv
->pages
[i
]);
1623 drm_free_large(obj_priv
->pages
);
1624 obj_priv
->pages
= NULL
;
1625 return PTR_ERR(page
);
1629 i915_gem_object_put_pages_gtt(struct drm_gem_object
*obj
)
1631 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1632 int page_count
= obj
->size
/ PAGE_SIZE
;
1635 BUG_ON(obj_priv
->madv
== __I915_MADV_PURGED
);
1637 if (obj_priv
->tiling_mode
!= I915_TILING_NONE
)
1638 i915_gem_object_save_bit_17_swizzle(obj
);
1640 if (obj_priv
->madv
== I915_MADV_DONTNEED
)
1641 obj_priv
->dirty
= 0;
1643 for (i
= 0; i
< page_count
; i
++) {
1644 if (obj_priv
->dirty
)
1645 set_page_dirty(obj_priv
->pages
[i
]);
1647 if (obj_priv
->madv
== I915_MADV_WILLNEED
)
1648 mark_page_accessed(obj_priv
->pages
[i
]);
1650 page_cache_release(obj_priv
->pages
[i
]);
1652 obj_priv
->dirty
= 0;
1654 drm_free_large(obj_priv
->pages
);
1655 obj_priv
->pages
= NULL
;
1659 i915_gem_next_request_seqno(struct drm_device
*dev
,
1660 struct intel_ring_buffer
*ring
)
1662 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1664 ring
->outstanding_lazy_request
= true;
1665 return dev_priv
->next_seqno
;
1669 i915_gem_object_move_to_active(struct drm_gem_object
*obj
,
1670 struct intel_ring_buffer
*ring
)
1672 struct drm_device
*dev
= obj
->dev
;
1673 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1674 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1675 uint32_t seqno
= i915_gem_next_request_seqno(dev
, ring
);
1677 BUG_ON(ring
== NULL
);
1678 obj_priv
->ring
= ring
;
1680 /* Add a reference if we're newly entering the active list. */
1681 if (!obj_priv
->active
) {
1682 drm_gem_object_reference(obj
);
1683 obj_priv
->active
= 1;
1686 /* Move from whatever list we were on to the tail of execution. */
1687 list_move_tail(&obj_priv
->mm_list
, &dev_priv
->mm
.active_list
);
1688 list_move_tail(&obj_priv
->ring_list
, &ring
->active_list
);
1689 obj_priv
->last_rendering_seqno
= seqno
;
1693 i915_gem_object_move_to_flushing(struct drm_gem_object
*obj
)
1695 struct drm_device
*dev
= obj
->dev
;
1696 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1697 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1699 BUG_ON(!obj_priv
->active
);
1700 list_move_tail(&obj_priv
->mm_list
, &dev_priv
->mm
.flushing_list
);
1701 list_del_init(&obj_priv
->ring_list
);
1702 obj_priv
->last_rendering_seqno
= 0;
1705 /* Immediately discard the backing storage */
1707 i915_gem_object_truncate(struct drm_gem_object
*obj
)
1709 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1710 struct inode
*inode
;
1712 /* Our goal here is to return as much of the memory as
1713 * is possible back to the system as we are called from OOM.
1714 * To do this we must instruct the shmfs to drop all of its
1715 * backing pages, *now*. Here we mirror the actions taken
1716 * when by shmem_delete_inode() to release the backing store.
1718 inode
= obj
->filp
->f_path
.dentry
->d_inode
;
1719 truncate_inode_pages(inode
->i_mapping
, 0);
1720 if (inode
->i_op
->truncate_range
)
1721 inode
->i_op
->truncate_range(inode
, 0, (loff_t
)-1);
1723 obj_priv
->madv
= __I915_MADV_PURGED
;
1727 i915_gem_object_is_purgeable(struct drm_i915_gem_object
*obj_priv
)
1729 return obj_priv
->madv
== I915_MADV_DONTNEED
;
1733 i915_gem_object_move_to_inactive(struct drm_gem_object
*obj
)
1735 struct drm_device
*dev
= obj
->dev
;
1736 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1737 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
1739 if (obj_priv
->pin_count
!= 0)
1740 list_move_tail(&obj_priv
->mm_list
, &dev_priv
->mm
.pinned_list
);
1742 list_move_tail(&obj_priv
->mm_list
, &dev_priv
->mm
.inactive_list
);
1743 list_del_init(&obj_priv
->ring_list
);
1745 BUG_ON(!list_empty(&obj_priv
->gpu_write_list
));
1747 obj_priv
->last_rendering_seqno
= 0;
1748 obj_priv
->ring
= NULL
;
1749 if (obj_priv
->active
) {
1750 obj_priv
->active
= 0;
1751 drm_gem_object_unreference(obj
);
1753 WARN_ON(i915_verify_lists(dev
));
1757 i915_gem_process_flushing_list(struct drm_device
*dev
,
1758 uint32_t flush_domains
,
1759 struct intel_ring_buffer
*ring
)
1761 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1762 struct drm_i915_gem_object
*obj_priv
, *next
;
1764 list_for_each_entry_safe(obj_priv
, next
,
1765 &ring
->gpu_write_list
,
1767 struct drm_gem_object
*obj
= &obj_priv
->base
;
1769 if (obj
->write_domain
& flush_domains
) {
1770 uint32_t old_write_domain
= obj
->write_domain
;
1772 obj
->write_domain
= 0;
1773 list_del_init(&obj_priv
->gpu_write_list
);
1774 i915_gem_object_move_to_active(obj
, ring
);
1776 /* update the fence lru list */
1777 if (obj_priv
->fence_reg
!= I915_FENCE_REG_NONE
) {
1778 struct drm_i915_fence_reg
*reg
=
1779 &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
1780 list_move_tail(®
->lru_list
,
1781 &dev_priv
->mm
.fence_list
);
1784 trace_i915_gem_object_change_domain(obj
,
1792 i915_add_request(struct drm_device
*dev
,
1793 struct drm_file
*file
,
1794 struct drm_i915_gem_request
*request
,
1795 struct intel_ring_buffer
*ring
)
1797 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1798 struct drm_i915_file_private
*file_priv
= NULL
;
1803 BUG_ON(request
== NULL
);
1806 file_priv
= file
->driver_priv
;
1808 ret
= ring
->add_request(ring
, &seqno
);
1812 ring
->outstanding_lazy_request
= false;
1814 request
->seqno
= seqno
;
1815 request
->ring
= ring
;
1816 request
->emitted_jiffies
= jiffies
;
1817 was_empty
= list_empty(&ring
->request_list
);
1818 list_add_tail(&request
->list
, &ring
->request_list
);
1821 spin_lock(&file_priv
->mm
.lock
);
1822 request
->file_priv
= file_priv
;
1823 list_add_tail(&request
->client_list
,
1824 &file_priv
->mm
.request_list
);
1825 spin_unlock(&file_priv
->mm
.lock
);
1828 if (!dev_priv
->mm
.suspended
) {
1829 mod_timer(&dev_priv
->hangcheck_timer
,
1830 jiffies
+ msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD
));
1832 queue_delayed_work(dev_priv
->wq
,
1833 &dev_priv
->mm
.retire_work
, HZ
);
1839 * Command execution barrier
1841 * Ensures that all commands in the ring are finished
1842 * before signalling the CPU
1845 i915_retire_commands(struct drm_device
*dev
, struct intel_ring_buffer
*ring
)
1847 uint32_t flush_domains
= 0;
1849 /* The sampler always gets flushed on i965 (sigh) */
1850 if (INTEL_INFO(dev
)->gen
>= 4)
1851 flush_domains
|= I915_GEM_DOMAIN_SAMPLER
;
1853 ring
->flush(ring
, I915_GEM_DOMAIN_COMMAND
, flush_domains
);
1857 i915_gem_request_remove_from_client(struct drm_i915_gem_request
*request
)
1859 struct drm_i915_file_private
*file_priv
= request
->file_priv
;
1864 spin_lock(&file_priv
->mm
.lock
);
1865 list_del(&request
->client_list
);
1866 request
->file_priv
= NULL
;
1867 spin_unlock(&file_priv
->mm
.lock
);
1870 static void i915_gem_reset_ring_lists(struct drm_i915_private
*dev_priv
,
1871 struct intel_ring_buffer
*ring
)
1873 while (!list_empty(&ring
->request_list
)) {
1874 struct drm_i915_gem_request
*request
;
1876 request
= list_first_entry(&ring
->request_list
,
1877 struct drm_i915_gem_request
,
1880 list_del(&request
->list
);
1881 i915_gem_request_remove_from_client(request
);
1885 while (!list_empty(&ring
->active_list
)) {
1886 struct drm_i915_gem_object
*obj_priv
;
1888 obj_priv
= list_first_entry(&ring
->active_list
,
1889 struct drm_i915_gem_object
,
1892 obj_priv
->base
.write_domain
= 0;
1893 list_del_init(&obj_priv
->gpu_write_list
);
1894 i915_gem_object_move_to_inactive(&obj_priv
->base
);
1898 void i915_gem_reset(struct drm_device
*dev
)
1900 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1901 struct drm_i915_gem_object
*obj_priv
;
1904 i915_gem_reset_ring_lists(dev_priv
, &dev_priv
->render_ring
);
1905 i915_gem_reset_ring_lists(dev_priv
, &dev_priv
->bsd_ring
);
1906 i915_gem_reset_ring_lists(dev_priv
, &dev_priv
->blt_ring
);
1908 /* Remove anything from the flushing lists. The GPU cache is likely
1909 * to be lost on reset along with the data, so simply move the
1910 * lost bo to the inactive list.
1912 while (!list_empty(&dev_priv
->mm
.flushing_list
)) {
1913 obj_priv
= list_first_entry(&dev_priv
->mm
.flushing_list
,
1914 struct drm_i915_gem_object
,
1917 obj_priv
->base
.write_domain
= 0;
1918 list_del_init(&obj_priv
->gpu_write_list
);
1919 i915_gem_object_move_to_inactive(&obj_priv
->base
);
1922 /* Move everything out of the GPU domains to ensure we do any
1923 * necessary invalidation upon reuse.
1925 list_for_each_entry(obj_priv
,
1926 &dev_priv
->mm
.inactive_list
,
1929 obj_priv
->base
.read_domains
&= ~I915_GEM_GPU_DOMAINS
;
1932 /* The fence registers are invalidated so clear them out */
1933 for (i
= 0; i
< 16; i
++) {
1934 struct drm_i915_fence_reg
*reg
;
1936 reg
= &dev_priv
->fence_regs
[i
];
1940 i915_gem_clear_fence_reg(reg
->obj
);
1945 * This function clears the request list as sequence numbers are passed.
1948 i915_gem_retire_requests_ring(struct drm_device
*dev
,
1949 struct intel_ring_buffer
*ring
)
1951 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1954 if (!ring
->status_page
.page_addr
||
1955 list_empty(&ring
->request_list
))
1958 WARN_ON(i915_verify_lists(dev
));
1960 seqno
= ring
->get_seqno(ring
);
1961 while (!list_empty(&ring
->request_list
)) {
1962 struct drm_i915_gem_request
*request
;
1964 request
= list_first_entry(&ring
->request_list
,
1965 struct drm_i915_gem_request
,
1968 if (!i915_seqno_passed(seqno
, request
->seqno
))
1971 trace_i915_gem_request_retire(dev
, request
->seqno
);
1973 list_del(&request
->list
);
1974 i915_gem_request_remove_from_client(request
);
1978 /* Move any buffers on the active list that are no longer referenced
1979 * by the ringbuffer to the flushing/inactive lists as appropriate.
1981 while (!list_empty(&ring
->active_list
)) {
1982 struct drm_gem_object
*obj
;
1983 struct drm_i915_gem_object
*obj_priv
;
1985 obj_priv
= list_first_entry(&ring
->active_list
,
1986 struct drm_i915_gem_object
,
1989 if (!i915_seqno_passed(seqno
, obj_priv
->last_rendering_seqno
))
1992 obj
= &obj_priv
->base
;
1993 if (obj
->write_domain
!= 0)
1994 i915_gem_object_move_to_flushing(obj
);
1996 i915_gem_object_move_to_inactive(obj
);
1999 if (unlikely (dev_priv
->trace_irq_seqno
&&
2000 i915_seqno_passed(dev_priv
->trace_irq_seqno
, seqno
))) {
2001 ring
->user_irq_put(ring
);
2002 dev_priv
->trace_irq_seqno
= 0;
2005 WARN_ON(i915_verify_lists(dev
));
2009 i915_gem_retire_requests(struct drm_device
*dev
)
2011 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2013 if (!list_empty(&dev_priv
->mm
.deferred_free_list
)) {
2014 struct drm_i915_gem_object
*obj_priv
, *tmp
;
2016 /* We must be careful that during unbind() we do not
2017 * accidentally infinitely recurse into retire requests.
2019 * retire -> free -> unbind -> wait -> retire_ring
2021 list_for_each_entry_safe(obj_priv
, tmp
,
2022 &dev_priv
->mm
.deferred_free_list
,
2024 i915_gem_free_object_tail(&obj_priv
->base
);
2027 i915_gem_retire_requests_ring(dev
, &dev_priv
->render_ring
);
2028 i915_gem_retire_requests_ring(dev
, &dev_priv
->bsd_ring
);
2029 i915_gem_retire_requests_ring(dev
, &dev_priv
->blt_ring
);
2033 i915_gem_retire_work_handler(struct work_struct
*work
)
2035 drm_i915_private_t
*dev_priv
;
2036 struct drm_device
*dev
;
2038 dev_priv
= container_of(work
, drm_i915_private_t
,
2039 mm
.retire_work
.work
);
2040 dev
= dev_priv
->dev
;
2042 /* Come back later if the device is busy... */
2043 if (!mutex_trylock(&dev
->struct_mutex
)) {
2044 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, HZ
);
2048 i915_gem_retire_requests(dev
);
2050 if (!dev_priv
->mm
.suspended
&&
2051 (!list_empty(&dev_priv
->render_ring
.request_list
) ||
2052 !list_empty(&dev_priv
->bsd_ring
.request_list
) ||
2053 !list_empty(&dev_priv
->blt_ring
.request_list
)))
2054 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, HZ
);
2055 mutex_unlock(&dev
->struct_mutex
);
2059 i915_do_wait_request(struct drm_device
*dev
, uint32_t seqno
,
2060 bool interruptible
, struct intel_ring_buffer
*ring
)
2062 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2068 if (atomic_read(&dev_priv
->mm
.wedged
))
2071 if (ring
->outstanding_lazy_request
) {
2072 struct drm_i915_gem_request
*request
;
2074 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2075 if (request
== NULL
)
2078 ret
= i915_add_request(dev
, NULL
, request
, ring
);
2084 seqno
= request
->seqno
;
2086 BUG_ON(seqno
== dev_priv
->next_seqno
);
2088 if (!i915_seqno_passed(ring
->get_seqno(ring
), seqno
)) {
2089 if (HAS_PCH_SPLIT(dev
))
2090 ier
= I915_READ(DEIER
) | I915_READ(GTIER
);
2092 ier
= I915_READ(IER
);
2094 DRM_ERROR("something (likely vbetool) disabled "
2095 "interrupts, re-enabling\n");
2096 i915_driver_irq_preinstall(dev
);
2097 i915_driver_irq_postinstall(dev
);
2100 trace_i915_gem_request_wait_begin(dev
, seqno
);
2102 ring
->waiting_seqno
= seqno
;
2103 ring
->user_irq_get(ring
);
2105 ret
= wait_event_interruptible(ring
->irq_queue
,
2106 i915_seqno_passed(ring
->get_seqno(ring
), seqno
)
2107 || atomic_read(&dev_priv
->mm
.wedged
));
2109 wait_event(ring
->irq_queue
,
2110 i915_seqno_passed(ring
->get_seqno(ring
), seqno
)
2111 || atomic_read(&dev_priv
->mm
.wedged
));
2113 ring
->user_irq_put(ring
);
2114 ring
->waiting_seqno
= 0;
2116 trace_i915_gem_request_wait_end(dev
, seqno
);
2118 if (atomic_read(&dev_priv
->mm
.wedged
))
2121 if (ret
&& ret
!= -ERESTARTSYS
)
2122 DRM_ERROR("%s returns %d (awaiting %d at %d, next %d)\n",
2123 __func__
, ret
, seqno
, ring
->get_seqno(ring
),
2124 dev_priv
->next_seqno
);
2126 /* Directly dispatch request retiring. While we have the work queue
2127 * to handle this, the waiter on a request often wants an associated
2128 * buffer to have made it to the inactive list, and we would need
2129 * a separate wait queue to handle that.
2132 i915_gem_retire_requests_ring(dev
, ring
);
2138 * Waits for a sequence number to be signaled, and cleans up the
2139 * request and object lists appropriately for that event.
2142 i915_wait_request(struct drm_device
*dev
, uint32_t seqno
,
2143 struct intel_ring_buffer
*ring
)
2145 return i915_do_wait_request(dev
, seqno
, 1, ring
);
2149 i915_gem_flush_ring(struct drm_device
*dev
,
2150 struct drm_file
*file_priv
,
2151 struct intel_ring_buffer
*ring
,
2152 uint32_t invalidate_domains
,
2153 uint32_t flush_domains
)
2155 ring
->flush(ring
, invalidate_domains
, flush_domains
);
2156 i915_gem_process_flushing_list(dev
, flush_domains
, ring
);
2160 i915_gem_flush(struct drm_device
*dev
,
2161 struct drm_file
*file_priv
,
2162 uint32_t invalidate_domains
,
2163 uint32_t flush_domains
,
2164 uint32_t flush_rings
)
2166 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2168 if (flush_domains
& I915_GEM_DOMAIN_CPU
)
2169 drm_agp_chipset_flush(dev
);
2171 if ((flush_domains
| invalidate_domains
) & I915_GEM_GPU_DOMAINS
) {
2172 if (flush_rings
& RING_RENDER
)
2173 i915_gem_flush_ring(dev
, file_priv
,
2174 &dev_priv
->render_ring
,
2175 invalidate_domains
, flush_domains
);
2176 if (flush_rings
& RING_BSD
)
2177 i915_gem_flush_ring(dev
, file_priv
,
2178 &dev_priv
->bsd_ring
,
2179 invalidate_domains
, flush_domains
);
2180 if (flush_rings
& RING_BLT
)
2181 i915_gem_flush_ring(dev
, file_priv
,
2182 &dev_priv
->blt_ring
,
2183 invalidate_domains
, flush_domains
);
2188 * Ensures that all rendering to the object has completed and the object is
2189 * safe to unbind from the GTT or access from the CPU.
2192 i915_gem_object_wait_rendering(struct drm_gem_object
*obj
,
2195 struct drm_device
*dev
= obj
->dev
;
2196 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2199 /* This function only exists to support waiting for existing rendering,
2200 * not for emitting required flushes.
2202 BUG_ON((obj
->write_domain
& I915_GEM_GPU_DOMAINS
) != 0);
2204 /* If there is rendering queued on the buffer being evicted, wait for
2207 if (obj_priv
->active
) {
2208 ret
= i915_do_wait_request(dev
,
2209 obj_priv
->last_rendering_seqno
,
2220 * Unbinds an object from the GTT aperture.
2223 i915_gem_object_unbind(struct drm_gem_object
*obj
)
2225 struct drm_device
*dev
= obj
->dev
;
2226 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2227 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2230 if (obj_priv
->gtt_space
== NULL
)
2233 if (obj_priv
->pin_count
!= 0) {
2234 DRM_ERROR("Attempting to unbind pinned buffer\n");
2238 /* blow away mappings if mapped through GTT */
2239 i915_gem_release_mmap(obj
);
2241 /* Move the object to the CPU domain to ensure that
2242 * any possible CPU writes while it's not in the GTT
2243 * are flushed when we go to remap it. This will
2244 * also ensure that all pending GPU writes are finished
2247 ret
= i915_gem_object_set_to_cpu_domain(obj
, 1);
2248 if (ret
== -ERESTARTSYS
)
2250 /* Continue on if we fail due to EIO, the GPU is hung so we
2251 * should be safe and we need to cleanup or else we might
2252 * cause memory corruption through use-after-free.
2255 i915_gem_clflush_object(obj
);
2256 obj
->read_domains
= obj
->write_domain
= I915_GEM_DOMAIN_CPU
;
2259 /* release the fence reg _after_ flushing */
2260 if (obj_priv
->fence_reg
!= I915_FENCE_REG_NONE
)
2261 i915_gem_clear_fence_reg(obj
);
2263 drm_unbind_agp(obj_priv
->agp_mem
);
2264 drm_free_agp(obj_priv
->agp_mem
, obj
->size
/ PAGE_SIZE
);
2266 i915_gem_object_put_pages_gtt(obj
);
2268 i915_gem_info_remove_gtt(dev_priv
, obj_priv
);
2269 list_del_init(&obj_priv
->mm_list
);
2270 obj_priv
->fenceable
= true;
2271 obj_priv
->mappable
= true;
2273 drm_mm_put_block(obj_priv
->gtt_space
);
2274 obj_priv
->gtt_space
= NULL
;
2275 obj_priv
->gtt_offset
= 0;
2277 if (i915_gem_object_is_purgeable(obj_priv
))
2278 i915_gem_object_truncate(obj
);
2280 trace_i915_gem_object_unbind(obj
);
2285 static int i915_ring_idle(struct drm_device
*dev
,
2286 struct intel_ring_buffer
*ring
)
2288 if (list_empty(&ring
->gpu_write_list
))
2291 i915_gem_flush_ring(dev
, NULL
, ring
,
2292 I915_GEM_GPU_DOMAINS
, I915_GEM_GPU_DOMAINS
);
2293 return i915_wait_request(dev
,
2294 i915_gem_next_request_seqno(dev
, ring
),
2299 i915_gpu_idle(struct drm_device
*dev
)
2301 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2305 lists_empty
= (list_empty(&dev_priv
->mm
.flushing_list
) &&
2306 list_empty(&dev_priv
->render_ring
.active_list
) &&
2307 list_empty(&dev_priv
->bsd_ring
.active_list
) &&
2308 list_empty(&dev_priv
->blt_ring
.active_list
));
2312 /* Flush everything onto the inactive list. */
2313 ret
= i915_ring_idle(dev
, &dev_priv
->render_ring
);
2317 ret
= i915_ring_idle(dev
, &dev_priv
->bsd_ring
);
2321 ret
= i915_ring_idle(dev
, &dev_priv
->blt_ring
);
2328 static void sandybridge_write_fence_reg(struct drm_gem_object
*obj
)
2330 struct drm_device
*dev
= obj
->dev
;
2331 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2332 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2333 u32 size
= i915_gem_get_gtt_size(obj_priv
);
2334 int regnum
= obj_priv
->fence_reg
;
2337 val
= (uint64_t)((obj_priv
->gtt_offset
+ size
- 4096) &
2339 val
|= obj_priv
->gtt_offset
& 0xfffff000;
2340 val
|= (uint64_t)((obj_priv
->stride
/ 128) - 1) <<
2341 SANDYBRIDGE_FENCE_PITCH_SHIFT
;
2343 if (obj_priv
->tiling_mode
== I915_TILING_Y
)
2344 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2345 val
|= I965_FENCE_REG_VALID
;
2347 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0
+ (regnum
* 8), val
);
2350 static void i965_write_fence_reg(struct drm_gem_object
*obj
)
2352 struct drm_device
*dev
= obj
->dev
;
2353 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2354 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2355 u32 size
= i915_gem_get_gtt_size(obj_priv
);
2356 int regnum
= obj_priv
->fence_reg
;
2359 val
= (uint64_t)((obj_priv
->gtt_offset
+ size
- 4096) &
2361 val
|= obj_priv
->gtt_offset
& 0xfffff000;
2362 val
|= ((obj_priv
->stride
/ 128) - 1) << I965_FENCE_PITCH_SHIFT
;
2363 if (obj_priv
->tiling_mode
== I915_TILING_Y
)
2364 val
|= 1 << I965_FENCE_TILING_Y_SHIFT
;
2365 val
|= I965_FENCE_REG_VALID
;
2367 I915_WRITE64(FENCE_REG_965_0
+ (regnum
* 8), val
);
2370 static void i915_write_fence_reg(struct drm_gem_object
*obj
)
2372 struct drm_device
*dev
= obj
->dev
;
2373 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2374 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2375 u32 size
= i915_gem_get_gtt_size(obj_priv
);
2376 uint32_t fence_reg
, val
, pitch_val
;
2379 if ((obj_priv
->gtt_offset
& ~I915_FENCE_START_MASK
) ||
2380 (obj_priv
->gtt_offset
& (size
- 1))) {
2381 WARN(1, "%s: object 0x%08x [fenceable? %d] not 1M or size (0x%08x) aligned [gtt_space offset=%lx, size=%lx]\n",
2382 __func__
, obj_priv
->gtt_offset
, obj_priv
->fenceable
, size
,
2383 obj_priv
->gtt_space
->start
, obj_priv
->gtt_space
->size
);
2387 if (obj_priv
->tiling_mode
== I915_TILING_Y
&&
2388 HAS_128_BYTE_Y_TILING(dev
))
2393 /* Note: pitch better be a power of two tile widths */
2394 pitch_val
= obj_priv
->stride
/ tile_width
;
2395 pitch_val
= ffs(pitch_val
) - 1;
2397 if (obj_priv
->tiling_mode
== I915_TILING_Y
&&
2398 HAS_128_BYTE_Y_TILING(dev
))
2399 WARN_ON(pitch_val
> I830_FENCE_MAX_PITCH_VAL
);
2401 WARN_ON(pitch_val
> I915_FENCE_MAX_PITCH_VAL
);
2403 val
= obj_priv
->gtt_offset
;
2404 if (obj_priv
->tiling_mode
== I915_TILING_Y
)
2405 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2406 val
|= I915_FENCE_SIZE_BITS(size
);
2407 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2408 val
|= I830_FENCE_REG_VALID
;
2410 fence_reg
= obj_priv
->fence_reg
;
2412 fence_reg
= FENCE_REG_830_0
+ fence_reg
* 4;
2414 fence_reg
= FENCE_REG_945_8
+ (fence_reg
- 8) * 4;
2415 I915_WRITE(fence_reg
, val
);
2418 static void i830_write_fence_reg(struct drm_gem_object
*obj
)
2420 struct drm_device
*dev
= obj
->dev
;
2421 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2422 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2423 u32 size
= i915_gem_get_gtt_size(obj_priv
);
2424 int regnum
= obj_priv
->fence_reg
;
2427 uint32_t fence_size_bits
;
2429 if ((obj_priv
->gtt_offset
& ~I830_FENCE_START_MASK
) ||
2430 (obj_priv
->gtt_offset
& (obj
->size
- 1))) {
2431 WARN(1, "%s: object 0x%08x not 512K or size aligned\n",
2432 __func__
, obj_priv
->gtt_offset
);
2436 pitch_val
= obj_priv
->stride
/ 128;
2437 pitch_val
= ffs(pitch_val
) - 1;
2438 WARN_ON(pitch_val
> I830_FENCE_MAX_PITCH_VAL
);
2440 val
= obj_priv
->gtt_offset
;
2441 if (obj_priv
->tiling_mode
== I915_TILING_Y
)
2442 val
|= 1 << I830_FENCE_TILING_Y_SHIFT
;
2443 fence_size_bits
= I830_FENCE_SIZE_BITS(size
);
2444 WARN_ON(fence_size_bits
& ~0x00000f00);
2445 val
|= fence_size_bits
;
2446 val
|= pitch_val
<< I830_FENCE_PITCH_SHIFT
;
2447 val
|= I830_FENCE_REG_VALID
;
2449 I915_WRITE(FENCE_REG_830_0
+ (regnum
* 4), val
);
2452 static int i915_find_fence_reg(struct drm_device
*dev
,
2455 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2456 struct drm_i915_fence_reg
*reg
;
2457 struct drm_i915_gem_object
*obj_priv
= NULL
;
2460 /* First try to find a free reg */
2462 for (i
= dev_priv
->fence_reg_start
; i
< dev_priv
->num_fence_regs
; i
++) {
2463 reg
= &dev_priv
->fence_regs
[i
];
2467 obj_priv
= to_intel_bo(reg
->obj
);
2468 if (!obj_priv
->pin_count
)
2475 /* None available, try to steal one or wait for a user to finish */
2476 avail
= I915_FENCE_REG_NONE
;
2477 list_for_each_entry(reg
, &dev_priv
->mm
.fence_list
,
2479 obj_priv
= to_intel_bo(reg
->obj
);
2480 if (obj_priv
->pin_count
)
2484 avail
= obj_priv
->fence_reg
;
2488 BUG_ON(avail
== I915_FENCE_REG_NONE
);
2490 /* We only have a reference on obj from the active list. put_fence_reg
2491 * might drop that one, causing a use-after-free in it. So hold a
2492 * private reference to obj like the other callers of put_fence_reg
2493 * (set_tiling ioctl) do. */
2494 drm_gem_object_reference(&obj_priv
->base
);
2495 ret
= i915_gem_object_put_fence_reg(&obj_priv
->base
, interruptible
);
2496 drm_gem_object_unreference(&obj_priv
->base
);
2504 * i915_gem_object_get_fence_reg - set up a fence reg for an object
2505 * @obj: object to map through a fence reg
2507 * When mapping objects through the GTT, userspace wants to be able to write
2508 * to them without having to worry about swizzling if the object is tiled.
2510 * This function walks the fence regs looking for a free one for @obj,
2511 * stealing one if it can't find any.
2513 * It then sets up the reg based on the object's properties: address, pitch
2514 * and tiling format.
2517 i915_gem_object_get_fence_reg(struct drm_gem_object
*obj
,
2520 struct drm_device
*dev
= obj
->dev
;
2521 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2522 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2523 struct drm_i915_fence_reg
*reg
= NULL
;
2526 /* Just update our place in the LRU if our fence is getting used. */
2527 if (obj_priv
->fence_reg
!= I915_FENCE_REG_NONE
) {
2528 reg
= &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
2529 list_move_tail(®
->lru_list
, &dev_priv
->mm
.fence_list
);
2533 switch (obj_priv
->tiling_mode
) {
2534 case I915_TILING_NONE
:
2535 WARN(1, "allocating a fence for non-tiled object?\n");
2538 if (!obj_priv
->stride
)
2540 WARN((obj_priv
->stride
& (512 - 1)),
2541 "object 0x%08x is X tiled but has non-512B pitch\n",
2542 obj_priv
->gtt_offset
);
2545 if (!obj_priv
->stride
)
2547 WARN((obj_priv
->stride
& (128 - 1)),
2548 "object 0x%08x is Y tiled but has non-128B pitch\n",
2549 obj_priv
->gtt_offset
);
2553 ret
= i915_find_fence_reg(dev
, interruptible
);
2557 obj_priv
->fence_reg
= ret
;
2558 reg
= &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
2559 list_add_tail(®
->lru_list
, &dev_priv
->mm
.fence_list
);
2563 switch (INTEL_INFO(dev
)->gen
) {
2565 sandybridge_write_fence_reg(obj
);
2569 i965_write_fence_reg(obj
);
2572 i915_write_fence_reg(obj
);
2575 i830_write_fence_reg(obj
);
2579 trace_i915_gem_object_get_fence(obj
,
2580 obj_priv
->fence_reg
,
2581 obj_priv
->tiling_mode
);
2587 * i915_gem_clear_fence_reg - clear out fence register info
2588 * @obj: object to clear
2590 * Zeroes out the fence register itself and clears out the associated
2591 * data structures in dev_priv and obj_priv.
2594 i915_gem_clear_fence_reg(struct drm_gem_object
*obj
)
2596 struct drm_device
*dev
= obj
->dev
;
2597 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2598 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2599 struct drm_i915_fence_reg
*reg
=
2600 &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
2603 switch (INTEL_INFO(dev
)->gen
) {
2605 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0
+
2606 (obj_priv
->fence_reg
* 8), 0);
2610 I915_WRITE64(FENCE_REG_965_0
+ (obj_priv
->fence_reg
* 8), 0);
2613 if (obj_priv
->fence_reg
>= 8)
2614 fence_reg
= FENCE_REG_945_8
+ (obj_priv
->fence_reg
- 8) * 4;
2617 fence_reg
= FENCE_REG_830_0
+ obj_priv
->fence_reg
* 4;
2619 I915_WRITE(fence_reg
, 0);
2624 obj_priv
->fence_reg
= I915_FENCE_REG_NONE
;
2625 list_del_init(®
->lru_list
);
2629 * i915_gem_object_put_fence_reg - waits on outstanding fenced access
2630 * to the buffer to finish, and then resets the fence register.
2631 * @obj: tiled object holding a fence register.
2632 * @bool: whether the wait upon the fence is interruptible
2634 * Zeroes out the fence register itself and clears out the associated
2635 * data structures in dev_priv and obj_priv.
2638 i915_gem_object_put_fence_reg(struct drm_gem_object
*obj
,
2641 struct drm_device
*dev
= obj
->dev
;
2642 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2643 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2644 struct drm_i915_fence_reg
*reg
;
2646 if (obj_priv
->fence_reg
== I915_FENCE_REG_NONE
)
2649 /* If we've changed tiling, GTT-mappings of the object
2650 * need to re-fault to ensure that the correct fence register
2651 * setup is in place.
2653 i915_gem_release_mmap(obj
);
2655 /* On the i915, GPU access to tiled buffers is via a fence,
2656 * therefore we must wait for any outstanding access to complete
2657 * before clearing the fence.
2659 reg
= &dev_priv
->fence_regs
[obj_priv
->fence_reg
];
2663 ret
= i915_gem_object_flush_gpu_write_domain(obj
, true);
2667 ret
= i915_gem_object_wait_rendering(obj
, interruptible
);
2674 i915_gem_object_flush_gtt_write_domain(obj
);
2675 i915_gem_clear_fence_reg(obj
);
2681 * Finds free space in the GTT aperture and binds the object there.
2684 i915_gem_object_bind_to_gtt(struct drm_gem_object
*obj
,
2689 struct drm_device
*dev
= obj
->dev
;
2690 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2691 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2692 struct drm_mm_node
*free_space
;
2693 gfp_t gfpmask
= __GFP_NORETRY
| __GFP_NOWARN
;
2694 u32 size
, fence_size
, fence_alignment
;
2697 if (obj_priv
->madv
!= I915_MADV_WILLNEED
) {
2698 DRM_ERROR("Attempting to bind a purgeable object\n");
2702 fence_size
= i915_gem_get_gtt_size(obj_priv
);
2703 fence_alignment
= i915_gem_get_gtt_alignment(obj_priv
);
2706 alignment
= need_fence
? fence_alignment
: 4096;
2707 if (need_fence
&& alignment
& (fence_alignment
- 1)) {
2708 DRM_ERROR("Invalid object alignment requested %u\n", alignment
);
2712 size
= need_fence
? fence_size
: obj
->size
;
2714 /* If the object is bigger than the entire aperture, reject it early
2715 * before evicting everything in a vain attempt to find space.
2718 (mappable
? dev_priv
->mm
.gtt_mappable_end
: dev_priv
->mm
.gtt_total
)) {
2719 DRM_ERROR("Attempting to bind an object larger than the aperture\n");
2726 drm_mm_search_free_in_range(&dev_priv
->mm
.gtt_space
,
2728 dev_priv
->mm
.gtt_mappable_end
,
2731 free_space
= drm_mm_search_free(&dev_priv
->mm
.gtt_space
,
2732 size
, alignment
, 0);
2734 if (free_space
!= NULL
) {
2736 obj_priv
->gtt_space
=
2737 drm_mm_get_block_range_generic(free_space
,
2739 dev_priv
->mm
.gtt_mappable_end
,
2742 obj_priv
->gtt_space
=
2743 drm_mm_get_block(free_space
, size
, alignment
);
2745 if (obj_priv
->gtt_space
== NULL
) {
2746 /* If the gtt is empty and we're still having trouble
2747 * fitting our object in, we're out of memory.
2749 ret
= i915_gem_evict_something(dev
, size
, alignment
, mappable
);
2756 ret
= i915_gem_object_get_pages_gtt(obj
, gfpmask
);
2758 drm_mm_put_block(obj_priv
->gtt_space
);
2759 obj_priv
->gtt_space
= NULL
;
2761 if (ret
== -ENOMEM
) {
2762 /* first try to clear up some space from the GTT */
2763 ret
= i915_gem_evict_something(dev
, size
,
2764 alignment
, mappable
);
2766 /* now try to shrink everyone else */
2781 /* Create an AGP memory structure pointing at our pages, and bind it
2784 obj_priv
->agp_mem
= drm_agp_bind_pages(dev
,
2786 obj
->size
>> PAGE_SHIFT
,
2787 obj_priv
->gtt_space
->start
,
2788 obj_priv
->agp_type
);
2789 if (obj_priv
->agp_mem
== NULL
) {
2790 i915_gem_object_put_pages_gtt(obj
);
2791 drm_mm_put_block(obj_priv
->gtt_space
);
2792 obj_priv
->gtt_space
= NULL
;
2794 ret
= i915_gem_evict_something(dev
, size
,
2795 alignment
, mappable
);
2802 obj_priv
->gtt_offset
= obj_priv
->gtt_space
->start
;
2804 /* keep track of bounds object by adding it to the inactive list */
2805 list_add_tail(&obj_priv
->mm_list
, &dev_priv
->mm
.inactive_list
);
2806 i915_gem_info_add_gtt(dev_priv
, obj_priv
);
2808 /* Assert that the object is not currently in any GPU domain. As it
2809 * wasn't in the GTT, there shouldn't be any way it could have been in
2812 BUG_ON(obj
->read_domains
& I915_GEM_GPU_DOMAINS
);
2813 BUG_ON(obj
->write_domain
& I915_GEM_GPU_DOMAINS
);
2815 trace_i915_gem_object_bind(obj
, obj_priv
->gtt_offset
, mappable
);
2817 obj_priv
->fenceable
=
2818 obj_priv
->gtt_space
->size
== fence_size
&&
2819 (obj_priv
->gtt_space
->start
& (fence_alignment
-1)) == 0;
2821 obj_priv
->mappable
=
2822 obj_priv
->gtt_offset
+ obj
->size
<= dev_priv
->mm
.gtt_mappable_end
;
2828 i915_gem_clflush_object(struct drm_gem_object
*obj
)
2830 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2832 /* If we don't have a page list set up, then we're not pinned
2833 * to GPU, and we can ignore the cache flush because it'll happen
2834 * again at bind time.
2836 if (obj_priv
->pages
== NULL
)
2839 trace_i915_gem_object_clflush(obj
);
2841 drm_clflush_pages(obj_priv
->pages
, obj
->size
/ PAGE_SIZE
);
2844 /** Flushes any GPU write domain for the object if it's dirty. */
2846 i915_gem_object_flush_gpu_write_domain(struct drm_gem_object
*obj
,
2849 struct drm_device
*dev
= obj
->dev
;
2851 if ((obj
->write_domain
& I915_GEM_GPU_DOMAINS
) == 0)
2854 /* Queue the GPU write cache flushing we need. */
2855 i915_gem_flush_ring(dev
, NULL
,
2856 to_intel_bo(obj
)->ring
,
2857 0, obj
->write_domain
);
2858 BUG_ON(obj
->write_domain
);
2863 return i915_gem_object_wait_rendering(obj
, true);
2866 /** Flushes the GTT write domain for the object if it's dirty. */
2868 i915_gem_object_flush_gtt_write_domain(struct drm_gem_object
*obj
)
2870 uint32_t old_write_domain
;
2872 if (obj
->write_domain
!= I915_GEM_DOMAIN_GTT
)
2875 /* No actual flushing is required for the GTT write domain. Writes
2876 * to it immediately go to main memory as far as we know, so there's
2877 * no chipset flush. It also doesn't land in render cache.
2879 i915_gem_release_mmap(obj
);
2881 old_write_domain
= obj
->write_domain
;
2882 obj
->write_domain
= 0;
2884 trace_i915_gem_object_change_domain(obj
,
2889 /** Flushes the CPU write domain for the object if it's dirty. */
2891 i915_gem_object_flush_cpu_write_domain(struct drm_gem_object
*obj
)
2893 struct drm_device
*dev
= obj
->dev
;
2894 uint32_t old_write_domain
;
2896 if (obj
->write_domain
!= I915_GEM_DOMAIN_CPU
)
2899 i915_gem_clflush_object(obj
);
2900 drm_agp_chipset_flush(dev
);
2901 old_write_domain
= obj
->write_domain
;
2902 obj
->write_domain
= 0;
2904 trace_i915_gem_object_change_domain(obj
,
2910 * Moves a single object to the GTT read, and possibly write domain.
2912 * This function returns when the move is complete, including waiting on
2916 i915_gem_object_set_to_gtt_domain(struct drm_gem_object
*obj
, int write
)
2918 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2919 uint32_t old_write_domain
, old_read_domains
;
2922 /* Not valid to be called on unbound objects. */
2923 if (obj_priv
->gtt_space
== NULL
)
2926 ret
= i915_gem_object_flush_gpu_write_domain(obj
, false);
2930 i915_gem_object_flush_cpu_write_domain(obj
);
2933 ret
= i915_gem_object_wait_rendering(obj
, true);
2938 old_write_domain
= obj
->write_domain
;
2939 old_read_domains
= obj
->read_domains
;
2941 /* It should now be out of any other write domains, and we can update
2942 * the domain values for our changes.
2944 BUG_ON((obj
->write_domain
& ~I915_GEM_DOMAIN_GTT
) != 0);
2945 obj
->read_domains
|= I915_GEM_DOMAIN_GTT
;
2947 obj
->read_domains
= I915_GEM_DOMAIN_GTT
;
2948 obj
->write_domain
= I915_GEM_DOMAIN_GTT
;
2949 obj_priv
->dirty
= 1;
2952 trace_i915_gem_object_change_domain(obj
,
2960 * Prepare buffer for display plane. Use uninterruptible for possible flush
2961 * wait, as in modesetting process we're not supposed to be interrupted.
2964 i915_gem_object_set_to_display_plane(struct drm_gem_object
*obj
,
2967 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
2968 uint32_t old_read_domains
;
2971 /* Not valid to be called on unbound objects. */
2972 if (obj_priv
->gtt_space
== NULL
)
2975 ret
= i915_gem_object_flush_gpu_write_domain(obj
, true);
2979 /* Currently, we are always called from an non-interruptible context. */
2981 ret
= i915_gem_object_wait_rendering(obj
, false);
2986 i915_gem_object_flush_cpu_write_domain(obj
);
2988 old_read_domains
= obj
->read_domains
;
2989 obj
->read_domains
|= I915_GEM_DOMAIN_GTT
;
2991 trace_i915_gem_object_change_domain(obj
,
2999 * Moves a single object to the CPU read, and possibly write domain.
3001 * This function returns when the move is complete, including waiting on
3005 i915_gem_object_set_to_cpu_domain(struct drm_gem_object
*obj
, int write
)
3007 uint32_t old_write_domain
, old_read_domains
;
3010 ret
= i915_gem_object_flush_gpu_write_domain(obj
, false);
3014 i915_gem_object_flush_gtt_write_domain(obj
);
3016 /* If we have a partially-valid cache of the object in the CPU,
3017 * finish invalidating it and free the per-page flags.
3019 i915_gem_object_set_to_full_cpu_read_domain(obj
);
3022 ret
= i915_gem_object_wait_rendering(obj
, true);
3027 old_write_domain
= obj
->write_domain
;
3028 old_read_domains
= obj
->read_domains
;
3030 /* Flush the CPU cache if it's still invalid. */
3031 if ((obj
->read_domains
& I915_GEM_DOMAIN_CPU
) == 0) {
3032 i915_gem_clflush_object(obj
);
3034 obj
->read_domains
|= I915_GEM_DOMAIN_CPU
;
3037 /* It should now be out of any other write domains, and we can update
3038 * the domain values for our changes.
3040 BUG_ON((obj
->write_domain
& ~I915_GEM_DOMAIN_CPU
) != 0);
3042 /* If we're writing through the CPU, then the GPU read domains will
3043 * need to be invalidated at next use.
3046 obj
->read_domains
= I915_GEM_DOMAIN_CPU
;
3047 obj
->write_domain
= I915_GEM_DOMAIN_CPU
;
3050 trace_i915_gem_object_change_domain(obj
,
3058 * Set the next domain for the specified object. This
3059 * may not actually perform the necessary flushing/invaliding though,
3060 * as that may want to be batched with other set_domain operations
3062 * This is (we hope) the only really tricky part of gem. The goal
3063 * is fairly simple -- track which caches hold bits of the object
3064 * and make sure they remain coherent. A few concrete examples may
3065 * help to explain how it works. For shorthand, we use the notation
3066 * (read_domains, write_domain), e.g. (CPU, CPU) to indicate the
3067 * a pair of read and write domain masks.
3069 * Case 1: the batch buffer
3075 * 5. Unmapped from GTT
3078 * Let's take these a step at a time
3081 * Pages allocated from the kernel may still have
3082 * cache contents, so we set them to (CPU, CPU) always.
3083 * 2. Written by CPU (using pwrite)
3084 * The pwrite function calls set_domain (CPU, CPU) and
3085 * this function does nothing (as nothing changes)
3087 * This function asserts that the object is not
3088 * currently in any GPU-based read or write domains
3090 * i915_gem_execbuffer calls set_domain (COMMAND, 0).
3091 * As write_domain is zero, this function adds in the
3092 * current read domains (CPU+COMMAND, 0).
3093 * flush_domains is set to CPU.
3094 * invalidate_domains is set to COMMAND
3095 * clflush is run to get data out of the CPU caches
3096 * then i915_dev_set_domain calls i915_gem_flush to
3097 * emit an MI_FLUSH and drm_agp_chipset_flush
3098 * 5. Unmapped from GTT
3099 * i915_gem_object_unbind calls set_domain (CPU, CPU)
3100 * flush_domains and invalidate_domains end up both zero
3101 * so no flushing/invalidating happens
3105 * Case 2: The shared render buffer
3109 * 3. Read/written by GPU
3110 * 4. set_domain to (CPU,CPU)
3111 * 5. Read/written by CPU
3112 * 6. Read/written by GPU
3115 * Same as last example, (CPU, CPU)
3117 * Nothing changes (assertions find that it is not in the GPU)
3118 * 3. Read/written by GPU
3119 * execbuffer calls set_domain (RENDER, RENDER)
3120 * flush_domains gets CPU
3121 * invalidate_domains gets GPU
3123 * MI_FLUSH and drm_agp_chipset_flush
3124 * 4. set_domain (CPU, CPU)
3125 * flush_domains gets GPU
3126 * invalidate_domains gets CPU
3127 * wait_rendering (obj) to make sure all drawing is complete.
3128 * This will include an MI_FLUSH to get the data from GPU
3130 * clflush (obj) to invalidate the CPU cache
3131 * Another MI_FLUSH in i915_gem_flush (eliminate this somehow?)
3132 * 5. Read/written by CPU
3133 * cache lines are loaded and dirtied
3134 * 6. Read written by GPU
3135 * Same as last GPU access
3137 * Case 3: The constant buffer
3142 * 4. Updated (written) by CPU again
3151 * flush_domains = CPU
3152 * invalidate_domains = RENDER
3155 * drm_agp_chipset_flush
3156 * 4. Updated (written) by CPU again
3158 * flush_domains = 0 (no previous write domain)
3159 * invalidate_domains = 0 (no new read domains)
3162 * flush_domains = CPU
3163 * invalidate_domains = RENDER
3166 * drm_agp_chipset_flush
3169 i915_gem_object_set_to_gpu_domain(struct drm_gem_object
*obj
,
3170 struct intel_ring_buffer
*ring
)
3172 struct drm_device
*dev
= obj
->dev
;
3173 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3174 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
3175 uint32_t invalidate_domains
= 0;
3176 uint32_t flush_domains
= 0;
3179 * If the object isn't moving to a new write domain,
3180 * let the object stay in multiple read domains
3182 if (obj
->pending_write_domain
== 0)
3183 obj
->pending_read_domains
|= obj
->read_domains
;
3186 * Flush the current write domain if
3187 * the new read domains don't match. Invalidate
3188 * any read domains which differ from the old
3191 if (obj
->write_domain
&&
3192 (obj
->write_domain
!= obj
->pending_read_domains
||
3193 obj_priv
->ring
!= ring
)) {
3194 flush_domains
|= obj
->write_domain
;
3195 invalidate_domains
|=
3196 obj
->pending_read_domains
& ~obj
->write_domain
;
3199 * Invalidate any read caches which may have
3200 * stale data. That is, any new read domains.
3202 invalidate_domains
|= obj
->pending_read_domains
& ~obj
->read_domains
;
3203 if ((flush_domains
| invalidate_domains
) & I915_GEM_DOMAIN_CPU
)
3204 i915_gem_clflush_object(obj
);
3206 /* blow away mappings if mapped through GTT */
3207 if ((flush_domains
| invalidate_domains
) & I915_GEM_DOMAIN_GTT
)
3208 i915_gem_release_mmap(obj
);
3210 /* The actual obj->write_domain will be updated with
3211 * pending_write_domain after we emit the accumulated flush for all
3212 * of our domain changes in execbuffers (which clears objects'
3213 * write_domains). So if we have a current write domain that we
3214 * aren't changing, set pending_write_domain to that.
3216 if (flush_domains
== 0 && obj
->pending_write_domain
== 0)
3217 obj
->pending_write_domain
= obj
->write_domain
;
3219 dev
->invalidate_domains
|= invalidate_domains
;
3220 dev
->flush_domains
|= flush_domains
;
3221 if (flush_domains
& I915_GEM_GPU_DOMAINS
)
3222 dev_priv
->mm
.flush_rings
|= obj_priv
->ring
->id
;
3223 if (invalidate_domains
& I915_GEM_GPU_DOMAINS
)
3224 dev_priv
->mm
.flush_rings
|= ring
->id
;
3228 * Moves the object from a partially CPU read to a full one.
3230 * Note that this only resolves i915_gem_object_set_cpu_read_domain_range(),
3231 * and doesn't handle transitioning from !(read_domains & I915_GEM_DOMAIN_CPU).
3234 i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object
*obj
)
3236 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
3238 if (!obj_priv
->page_cpu_valid
)
3241 /* If we're partially in the CPU read domain, finish moving it in.
3243 if (obj
->read_domains
& I915_GEM_DOMAIN_CPU
) {
3246 for (i
= 0; i
<= (obj
->size
- 1) / PAGE_SIZE
; i
++) {
3247 if (obj_priv
->page_cpu_valid
[i
])
3249 drm_clflush_pages(obj_priv
->pages
+ i
, 1);
3253 /* Free the page_cpu_valid mappings which are now stale, whether
3254 * or not we've got I915_GEM_DOMAIN_CPU.
3256 kfree(obj_priv
->page_cpu_valid
);
3257 obj_priv
->page_cpu_valid
= NULL
;
3261 * Set the CPU read domain on a range of the object.
3263 * The object ends up with I915_GEM_DOMAIN_CPU in its read flags although it's
3264 * not entirely valid. The page_cpu_valid member of the object flags which
3265 * pages have been flushed, and will be respected by
3266 * i915_gem_object_set_to_cpu_domain() if it's called on to get a valid mapping
3267 * of the whole object.
3269 * This function returns when the move is complete, including waiting on
3273 i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object
*obj
,
3274 uint64_t offset
, uint64_t size
)
3276 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
3277 uint32_t old_read_domains
;
3280 if (offset
== 0 && size
== obj
->size
)
3281 return i915_gem_object_set_to_cpu_domain(obj
, 0);
3283 ret
= i915_gem_object_flush_gpu_write_domain(obj
, false);
3286 i915_gem_object_flush_gtt_write_domain(obj
);
3288 /* If we're already fully in the CPU read domain, we're done. */
3289 if (obj_priv
->page_cpu_valid
== NULL
&&
3290 (obj
->read_domains
& I915_GEM_DOMAIN_CPU
) != 0)
3293 /* Otherwise, create/clear the per-page CPU read domain flag if we're
3294 * newly adding I915_GEM_DOMAIN_CPU
3296 if (obj_priv
->page_cpu_valid
== NULL
) {
3297 obj_priv
->page_cpu_valid
= kzalloc(obj
->size
/ PAGE_SIZE
,
3299 if (obj_priv
->page_cpu_valid
== NULL
)
3301 } else if ((obj
->read_domains
& I915_GEM_DOMAIN_CPU
) == 0)
3302 memset(obj_priv
->page_cpu_valid
, 0, obj
->size
/ PAGE_SIZE
);
3304 /* Flush the cache on any pages that are still invalid from the CPU's
3307 for (i
= offset
/ PAGE_SIZE
; i
<= (offset
+ size
- 1) / PAGE_SIZE
;
3309 if (obj_priv
->page_cpu_valid
[i
])
3312 drm_clflush_pages(obj_priv
->pages
+ i
, 1);
3314 obj_priv
->page_cpu_valid
[i
] = 1;
3317 /* It should now be out of any other write domains, and we can update
3318 * the domain values for our changes.
3320 BUG_ON((obj
->write_domain
& ~I915_GEM_DOMAIN_CPU
) != 0);
3322 old_read_domains
= obj
->read_domains
;
3323 obj
->read_domains
|= I915_GEM_DOMAIN_CPU
;
3325 trace_i915_gem_object_change_domain(obj
,
3333 * Pin an object to the GTT and evaluate the relocations landing in it.
3336 i915_gem_execbuffer_relocate(struct drm_i915_gem_object
*obj
,
3337 struct drm_file
*file_priv
,
3338 struct drm_i915_gem_exec_object2
*entry
)
3340 struct drm_device
*dev
= obj
->base
.dev
;
3341 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3342 struct drm_i915_gem_relocation_entry __user
*user_relocs
;
3343 struct drm_gem_object
*target_obj
= NULL
;
3344 uint32_t target_handle
= 0;
3347 user_relocs
= (void __user
*)(uintptr_t)entry
->relocs_ptr
;
3348 for (i
= 0; i
< entry
->relocation_count
; i
++) {
3349 struct drm_i915_gem_relocation_entry reloc
;
3350 uint32_t target_offset
;
3352 if (__copy_from_user_inatomic(&reloc
,
3359 if (reloc
.target_handle
!= target_handle
) {
3360 drm_gem_object_unreference(target_obj
);
3362 target_obj
= drm_gem_object_lookup(dev
, file_priv
,
3363 reloc
.target_handle
);
3364 if (target_obj
== NULL
) {
3369 target_handle
= reloc
.target_handle
;
3371 target_offset
= to_intel_bo(target_obj
)->gtt_offset
;
3374 DRM_INFO("%s: obj %p offset %08x target %d "
3375 "read %08x write %08x gtt %08x "
3376 "presumed %08x delta %08x\n",
3380 (int) reloc
.target_handle
,
3381 (int) reloc
.read_domains
,
3382 (int) reloc
.write_domain
,
3383 (int) target_offset
,
3384 (int) reloc
.presumed_offset
,
3388 /* The target buffer should have appeared before us in the
3389 * exec_object list, so it should have a GTT space bound by now.
3391 if (target_offset
== 0) {
3392 DRM_ERROR("No GTT space found for object %d\n",
3393 reloc
.target_handle
);
3398 /* Validate that the target is in a valid r/w GPU domain */
3399 if (reloc
.write_domain
& (reloc
.write_domain
- 1)) {
3400 DRM_ERROR("reloc with multiple write domains: "
3401 "obj %p target %d offset %d "
3402 "read %08x write %08x",
3403 obj
, reloc
.target_handle
,
3406 reloc
.write_domain
);
3410 if (reloc
.write_domain
& I915_GEM_DOMAIN_CPU
||
3411 reloc
.read_domains
& I915_GEM_DOMAIN_CPU
) {
3412 DRM_ERROR("reloc with read/write CPU domains: "
3413 "obj %p target %d offset %d "
3414 "read %08x write %08x",
3415 obj
, reloc
.target_handle
,
3418 reloc
.write_domain
);
3422 if (reloc
.write_domain
&& target_obj
->pending_write_domain
&&
3423 reloc
.write_domain
!= target_obj
->pending_write_domain
) {
3424 DRM_ERROR("Write domain conflict: "
3425 "obj %p target %d offset %d "
3426 "new %08x old %08x\n",
3427 obj
, reloc
.target_handle
,
3430 target_obj
->pending_write_domain
);
3435 target_obj
->pending_read_domains
|= reloc
.read_domains
;
3436 target_obj
->pending_write_domain
|= reloc
.write_domain
;
3438 /* If the relocation already has the right value in it, no
3439 * more work needs to be done.
3441 if (target_offset
== reloc
.presumed_offset
)
3444 /* Check that the relocation address is valid... */
3445 if (reloc
.offset
> obj
->base
.size
- 4) {
3446 DRM_ERROR("Relocation beyond object bounds: "
3447 "obj %p target %d offset %d size %d.\n",
3448 obj
, reloc
.target_handle
,
3449 (int) reloc
.offset
, (int) obj
->base
.size
);
3453 if (reloc
.offset
& 3) {
3454 DRM_ERROR("Relocation not 4-byte aligned: "
3455 "obj %p target %d offset %d.\n",
3456 obj
, reloc
.target_handle
,
3457 (int) reloc
.offset
);
3462 /* and points to somewhere within the target object. */
3463 if (reloc
.delta
>= target_obj
->size
) {
3464 DRM_ERROR("Relocation beyond target object bounds: "
3465 "obj %p target %d delta %d size %d.\n",
3466 obj
, reloc
.target_handle
,
3467 (int) reloc
.delta
, (int) target_obj
->size
);
3472 reloc
.delta
+= target_offset
;
3473 if (obj
->base
.write_domain
== I915_GEM_DOMAIN_CPU
) {
3474 uint32_t page_offset
= reloc
.offset
& ~PAGE_MASK
;
3477 vaddr
= kmap_atomic(obj
->pages
[reloc
.offset
>> PAGE_SHIFT
]);
3478 *(uint32_t *)(vaddr
+ page_offset
) = reloc
.delta
;
3479 kunmap_atomic(vaddr
);
3481 uint32_t __iomem
*reloc_entry
;
3482 void __iomem
*reloc_page
;
3484 ret
= i915_gem_object_set_to_gtt_domain(&obj
->base
, 1);
3488 /* Map the page containing the relocation we're going to perform. */
3489 reloc
.offset
+= obj
->gtt_offset
;
3490 reloc_page
= io_mapping_map_atomic_wc(dev_priv
->mm
.gtt_mapping
,
3491 reloc
.offset
& PAGE_MASK
);
3492 reloc_entry
= (uint32_t __iomem
*)
3493 (reloc_page
+ (reloc
.offset
& ~PAGE_MASK
));
3494 iowrite32(reloc
.delta
, reloc_entry
);
3495 io_mapping_unmap_atomic(reloc_page
);
3498 /* and update the user's relocation entry */
3499 reloc
.presumed_offset
= target_offset
;
3500 if (__copy_to_user_inatomic(&user_relocs
[i
].presumed_offset
,
3501 &reloc
.presumed_offset
,
3502 sizeof(reloc
.presumed_offset
))) {
3508 drm_gem_object_unreference(target_obj
);
3513 i915_gem_execbuffer_pin(struct drm_device
*dev
,
3514 struct drm_file
*file
,
3515 struct drm_gem_object
**object_list
,
3516 struct drm_i915_gem_exec_object2
*exec_list
,
3519 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3522 /* attempt to pin all of the buffers into the GTT */
3526 for (i
= 0; i
< count
; i
++) {
3527 struct drm_i915_gem_exec_object2
*entry
= &exec_list
[i
];
3528 struct drm_i915_gem_object
*obj
= to_intel_bo(object_list
[i
]);
3530 entry
->flags
& EXEC_OBJECT_NEEDS_FENCE
&&
3531 obj
->tiling_mode
!= I915_TILING_NONE
;
3533 /* g33/pnv can't fence buffers in the unmappable part */
3534 bool need_mappable
=
3535 entry
->relocation_count
? true : need_fence
;
3537 /* Check fence reg constraints and rebind if necessary */
3538 if ((need_fence
&& !obj
->fenceable
) ||
3539 (need_mappable
&& !obj
->mappable
)) {
3540 ret
= i915_gem_object_unbind(&obj
->base
);
3545 ret
= i915_gem_object_pin(&obj
->base
,
3553 * Pre-965 chips need a fence register set up in order
3554 * to properly handle blits to/from tiled surfaces.
3557 ret
= i915_gem_object_get_fence_reg(&obj
->base
, true);
3559 i915_gem_object_unpin(&obj
->base
);
3563 dev_priv
->fence_regs
[obj
->fence_reg
].gpu
= true;
3566 entry
->offset
= obj
->gtt_offset
;
3570 i915_gem_object_unpin(object_list
[i
]);
3572 if (ret
!= -ENOSPC
|| retry
> 1)
3575 /* First attempt, just clear anything that is purgeable.
3576 * Second attempt, clear the entire GTT.
3578 ret
= i915_gem_evict_everything(dev
, retry
== 0);
3587 i915_gem_execbuffer_move_to_gpu(struct drm_device
*dev
,
3588 struct drm_file
*file
,
3589 struct intel_ring_buffer
*ring
,
3590 struct drm_gem_object
**objects
,
3593 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3596 /* Zero the global flush/invalidate flags. These
3597 * will be modified as new domains are computed
3600 dev
->invalidate_domains
= 0;
3601 dev
->flush_domains
= 0;
3602 dev_priv
->mm
.flush_rings
= 0;
3603 for (i
= 0; i
< count
; i
++)
3604 i915_gem_object_set_to_gpu_domain(objects
[i
], ring
);
3606 if (dev
->invalidate_domains
| dev
->flush_domains
) {
3608 DRM_INFO("%s: invalidate_domains %08x flush_domains %08x\n",
3610 dev
->invalidate_domains
,
3611 dev
->flush_domains
);
3613 i915_gem_flush(dev
, file
,
3614 dev
->invalidate_domains
,
3616 dev_priv
->mm
.flush_rings
);
3619 for (i
= 0; i
< count
; i
++) {
3620 struct drm_i915_gem_object
*obj
= to_intel_bo(objects
[i
]);
3621 /* XXX replace with semaphores */
3622 if (obj
->ring
&& ring
!= obj
->ring
) {
3623 ret
= i915_gem_object_wait_rendering(&obj
->base
, true);
3632 /* Throttle our rendering by waiting until the ring has completed our requests
3633 * emitted over 20 msec ago.
3635 * Note that if we were to use the current jiffies each time around the loop,
3636 * we wouldn't escape the function with any frames outstanding if the time to
3637 * render a frame was over 20ms.
3639 * This should get us reasonable parallelism between CPU and GPU but also
3640 * relatively low latency when blocking on a particular request to finish.
3643 i915_gem_ring_throttle(struct drm_device
*dev
, struct drm_file
*file
)
3645 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3646 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
3647 unsigned long recent_enough
= jiffies
- msecs_to_jiffies(20);
3648 struct drm_i915_gem_request
*request
;
3649 struct intel_ring_buffer
*ring
= NULL
;
3653 spin_lock(&file_priv
->mm
.lock
);
3654 list_for_each_entry(request
, &file_priv
->mm
.request_list
, client_list
) {
3655 if (time_after_eq(request
->emitted_jiffies
, recent_enough
))
3658 ring
= request
->ring
;
3659 seqno
= request
->seqno
;
3661 spin_unlock(&file_priv
->mm
.lock
);
3667 if (!i915_seqno_passed(ring
->get_seqno(ring
), seqno
)) {
3668 /* And wait for the seqno passing without holding any locks and
3669 * causing extra latency for others. This is safe as the irq
3670 * generation is designed to be run atomically and so is
3673 ring
->user_irq_get(ring
);
3674 ret
= wait_event_interruptible(ring
->irq_queue
,
3675 i915_seqno_passed(ring
->get_seqno(ring
), seqno
)
3676 || atomic_read(&dev_priv
->mm
.wedged
));
3677 ring
->user_irq_put(ring
);
3679 if (ret
== 0 && atomic_read(&dev_priv
->mm
.wedged
))
3684 queue_delayed_work(dev_priv
->wq
, &dev_priv
->mm
.retire_work
, 0);
3690 i915_gem_check_execbuffer(struct drm_i915_gem_execbuffer2
*exec
,
3691 uint64_t exec_offset
)
3693 uint32_t exec_start
, exec_len
;
3695 exec_start
= (uint32_t) exec_offset
+ exec
->batch_start_offset
;
3696 exec_len
= (uint32_t) exec
->batch_len
;
3698 if ((exec_start
| exec_len
) & 0x7)
3708 validate_exec_list(struct drm_i915_gem_exec_object2
*exec
,
3713 for (i
= 0; i
< count
; i
++) {
3714 char __user
*ptr
= (char __user
*)(uintptr_t)exec
[i
].relocs_ptr
;
3715 size_t length
= exec
[i
].relocation_count
* sizeof(struct drm_i915_gem_relocation_entry
);
3717 if (!access_ok(VERIFY_READ
, ptr
, length
))
3720 /* we may also need to update the presumed offsets */
3721 if (!access_ok(VERIFY_WRITE
, ptr
, length
))
3724 if (fault_in_pages_readable(ptr
, length
))
3732 i915_gem_do_execbuffer(struct drm_device
*dev
, void *data
,
3733 struct drm_file
*file
,
3734 struct drm_i915_gem_execbuffer2
*args
,
3735 struct drm_i915_gem_exec_object2
*exec_list
)
3737 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3738 struct drm_gem_object
**object_list
= NULL
;
3739 struct drm_gem_object
*batch_obj
;
3740 struct drm_clip_rect
*cliprects
= NULL
;
3741 struct drm_i915_gem_request
*request
= NULL
;
3743 uint64_t exec_offset
;
3745 struct intel_ring_buffer
*ring
= NULL
;
3747 ret
= i915_gem_check_is_wedged(dev
);
3751 ret
= validate_exec_list(exec_list
, args
->buffer_count
);
3756 DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n",
3757 (int) args
->buffers_ptr
, args
->buffer_count
, args
->batch_len
);
3759 switch (args
->flags
& I915_EXEC_RING_MASK
) {
3760 case I915_EXEC_DEFAULT
:
3761 case I915_EXEC_RENDER
:
3762 ring
= &dev_priv
->render_ring
;
3765 if (!HAS_BSD(dev
)) {
3766 DRM_ERROR("execbuf with invalid ring (BSD)\n");
3769 ring
= &dev_priv
->bsd_ring
;
3772 if (!HAS_BLT(dev
)) {
3773 DRM_ERROR("execbuf with invalid ring (BLT)\n");
3776 ring
= &dev_priv
->blt_ring
;
3779 DRM_ERROR("execbuf with unknown ring: %d\n",
3780 (int)(args
->flags
& I915_EXEC_RING_MASK
));
3784 if (args
->buffer_count
< 1) {
3785 DRM_ERROR("execbuf with %d buffers\n", args
->buffer_count
);
3788 object_list
= drm_malloc_ab(sizeof(*object_list
), args
->buffer_count
);
3789 if (object_list
== NULL
) {
3790 DRM_ERROR("Failed to allocate object list for %d buffers\n",
3791 args
->buffer_count
);
3796 if (args
->num_cliprects
!= 0) {
3797 cliprects
= kcalloc(args
->num_cliprects
, sizeof(*cliprects
),
3799 if (cliprects
== NULL
) {
3804 ret
= copy_from_user(cliprects
,
3805 (struct drm_clip_rect __user
*)
3806 (uintptr_t) args
->cliprects_ptr
,
3807 sizeof(*cliprects
) * args
->num_cliprects
);
3809 DRM_ERROR("copy %d cliprects failed: %d\n",
3810 args
->num_cliprects
, ret
);
3816 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
3817 if (request
== NULL
) {
3822 ret
= i915_mutex_lock_interruptible(dev
);
3826 if (dev_priv
->mm
.suspended
) {
3827 mutex_unlock(&dev
->struct_mutex
);
3832 /* Look up object handles */
3833 for (i
= 0; i
< args
->buffer_count
; i
++) {
3834 struct drm_i915_gem_object
*obj_priv
;
3836 object_list
[i
] = drm_gem_object_lookup(dev
, file
,
3837 exec_list
[i
].handle
);
3838 if (object_list
[i
] == NULL
) {
3839 DRM_ERROR("Invalid object handle %d at index %d\n",
3840 exec_list
[i
].handle
, i
);
3841 /* prevent error path from reading uninitialized data */
3842 args
->buffer_count
= i
+ 1;
3847 obj_priv
= to_intel_bo(object_list
[i
]);
3848 if (obj_priv
->in_execbuffer
) {
3849 DRM_ERROR("Object %p appears more than once in object list\n",
3851 /* prevent error path from reading uninitialized data */
3852 args
->buffer_count
= i
+ 1;
3856 obj_priv
->in_execbuffer
= true;
3859 /* Move the objects en-masse into the GTT, evicting if necessary. */
3860 ret
= i915_gem_execbuffer_pin(dev
, file
,
3861 object_list
, exec_list
,
3862 args
->buffer_count
);
3866 /* The objects are in their final locations, apply the relocations. */
3867 for (i
= 0; i
< args
->buffer_count
; i
++) {
3868 struct drm_i915_gem_object
*obj
= to_intel_bo(object_list
[i
]);
3869 obj
->base
.pending_read_domains
= 0;
3870 obj
->base
.pending_write_domain
= 0;
3871 ret
= i915_gem_execbuffer_relocate(obj
, file
, &exec_list
[i
]);
3876 /* Set the pending read domains for the batch buffer to COMMAND */
3877 batch_obj
= object_list
[args
->buffer_count
-1];
3878 if (batch_obj
->pending_write_domain
) {
3879 DRM_ERROR("Attempting to use self-modifying batch buffer\n");
3883 batch_obj
->pending_read_domains
|= I915_GEM_DOMAIN_COMMAND
;
3885 /* Sanity check the batch buffer */
3886 exec_offset
= to_intel_bo(batch_obj
)->gtt_offset
;
3887 ret
= i915_gem_check_execbuffer(args
, exec_offset
);
3889 DRM_ERROR("execbuf with invalid offset/length\n");
3893 ret
= i915_gem_execbuffer_move_to_gpu(dev
, file
, ring
,
3894 object_list
, args
->buffer_count
);
3899 for (i
= 0; i
< args
->buffer_count
; i
++) {
3900 i915_gem_object_check_coherency(object_list
[i
],
3901 exec_list
[i
].handle
);
3906 i915_gem_dump_object(batch_obj
,
3912 /* Check for any pending flips. As we only maintain a flip queue depth
3913 * of 1, we can simply insert a WAIT for the next display flip prior
3914 * to executing the batch and avoid stalling the CPU.
3917 for (i
= 0; i
< args
->buffer_count
; i
++) {
3918 if (object_list
[i
]->write_domain
)
3919 flips
|= atomic_read(&to_intel_bo(object_list
[i
])->pending_flip
);
3922 int plane
, flip_mask
;
3924 for (plane
= 0; flips
>> plane
; plane
++) {
3925 if (((flips
>> plane
) & 1) == 0)
3929 flip_mask
= MI_WAIT_FOR_PLANE_B_FLIP
;
3931 flip_mask
= MI_WAIT_FOR_PLANE_A_FLIP
;
3933 ret
= intel_ring_begin(ring
, 2);
3937 intel_ring_emit(ring
, MI_WAIT_FOR_EVENT
| flip_mask
);
3938 intel_ring_emit(ring
, MI_NOOP
);
3939 intel_ring_advance(ring
);
3943 /* Exec the batchbuffer */
3944 ret
= ring
->dispatch_execbuffer(ring
, args
, cliprects
, exec_offset
);
3946 DRM_ERROR("dispatch failed %d\n", ret
);
3950 for (i
= 0; i
< args
->buffer_count
; i
++) {
3951 struct drm_gem_object
*obj
= object_list
[i
];
3953 obj
->read_domains
= obj
->pending_read_domains
;
3954 obj
->write_domain
= obj
->pending_write_domain
;
3956 i915_gem_object_move_to_active(obj
, ring
);
3957 if (obj
->write_domain
) {
3958 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
3959 obj_priv
->dirty
= 1;
3960 list_move_tail(&obj_priv
->gpu_write_list
,
3961 &ring
->gpu_write_list
);
3962 intel_mark_busy(dev
, obj
);
3965 trace_i915_gem_object_change_domain(obj
,
3971 * Ensure that the commands in the batch buffer are
3972 * finished before the interrupt fires
3974 i915_retire_commands(dev
, ring
);
3976 if (i915_add_request(dev
, file
, request
, ring
))
3977 ring
->outstanding_lazy_request
= true;
3982 for (i
= 0; i
< args
->buffer_count
; i
++) {
3983 if (object_list
[i
] == NULL
)
3986 to_intel_bo(object_list
[i
])->in_execbuffer
= false;
3987 drm_gem_object_unreference(object_list
[i
]);
3990 mutex_unlock(&dev
->struct_mutex
);
3993 drm_free_large(object_list
);
4001 * Legacy execbuffer just creates an exec2 list from the original exec object
4002 * list array and passes it to the real function.
4005 i915_gem_execbuffer(struct drm_device
*dev
, void *data
,
4006 struct drm_file
*file_priv
)
4008 struct drm_i915_gem_execbuffer
*args
= data
;
4009 struct drm_i915_gem_execbuffer2 exec2
;
4010 struct drm_i915_gem_exec_object
*exec_list
= NULL
;
4011 struct drm_i915_gem_exec_object2
*exec2_list
= NULL
;
4015 DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n",
4016 (int) args
->buffers_ptr
, args
->buffer_count
, args
->batch_len
);
4019 if (args
->buffer_count
< 1) {
4020 DRM_ERROR("execbuf with %d buffers\n", args
->buffer_count
);
4024 /* Copy in the exec list from userland */
4025 exec_list
= drm_malloc_ab(sizeof(*exec_list
), args
->buffer_count
);
4026 exec2_list
= drm_malloc_ab(sizeof(*exec2_list
), args
->buffer_count
);
4027 if (exec_list
== NULL
|| exec2_list
== NULL
) {
4028 DRM_ERROR("Failed to allocate exec list for %d buffers\n",
4029 args
->buffer_count
);
4030 drm_free_large(exec_list
);
4031 drm_free_large(exec2_list
);
4034 ret
= copy_from_user(exec_list
,
4035 (struct drm_i915_relocation_entry __user
*)
4036 (uintptr_t) args
->buffers_ptr
,
4037 sizeof(*exec_list
) * args
->buffer_count
);
4039 DRM_ERROR("copy %d exec entries failed %d\n",
4040 args
->buffer_count
, ret
);
4041 drm_free_large(exec_list
);
4042 drm_free_large(exec2_list
);
4046 for (i
= 0; i
< args
->buffer_count
; i
++) {
4047 exec2_list
[i
].handle
= exec_list
[i
].handle
;
4048 exec2_list
[i
].relocation_count
= exec_list
[i
].relocation_count
;
4049 exec2_list
[i
].relocs_ptr
= exec_list
[i
].relocs_ptr
;
4050 exec2_list
[i
].alignment
= exec_list
[i
].alignment
;
4051 exec2_list
[i
].offset
= exec_list
[i
].offset
;
4052 if (INTEL_INFO(dev
)->gen
< 4)
4053 exec2_list
[i
].flags
= EXEC_OBJECT_NEEDS_FENCE
;
4055 exec2_list
[i
].flags
= 0;
4058 exec2
.buffers_ptr
= args
->buffers_ptr
;
4059 exec2
.buffer_count
= args
->buffer_count
;
4060 exec2
.batch_start_offset
= args
->batch_start_offset
;
4061 exec2
.batch_len
= args
->batch_len
;
4062 exec2
.DR1
= args
->DR1
;
4063 exec2
.DR4
= args
->DR4
;
4064 exec2
.num_cliprects
= args
->num_cliprects
;
4065 exec2
.cliprects_ptr
= args
->cliprects_ptr
;
4066 exec2
.flags
= I915_EXEC_RENDER
;
4068 ret
= i915_gem_do_execbuffer(dev
, data
, file_priv
, &exec2
, exec2_list
);
4070 /* Copy the new buffer offsets back to the user's exec list. */
4071 for (i
= 0; i
< args
->buffer_count
; i
++)
4072 exec_list
[i
].offset
= exec2_list
[i
].offset
;
4073 /* ... and back out to userspace */
4074 ret
= copy_to_user((struct drm_i915_relocation_entry __user
*)
4075 (uintptr_t) args
->buffers_ptr
,
4077 sizeof(*exec_list
) * args
->buffer_count
);
4080 DRM_ERROR("failed to copy %d exec entries "
4081 "back to user (%d)\n",
4082 args
->buffer_count
, ret
);
4086 drm_free_large(exec_list
);
4087 drm_free_large(exec2_list
);
4092 i915_gem_execbuffer2(struct drm_device
*dev
, void *data
,
4093 struct drm_file
*file_priv
)
4095 struct drm_i915_gem_execbuffer2
*args
= data
;
4096 struct drm_i915_gem_exec_object2
*exec2_list
= NULL
;
4100 DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n",
4101 (int) args
->buffers_ptr
, args
->buffer_count
, args
->batch_len
);
4104 if (args
->buffer_count
< 1) {
4105 DRM_ERROR("execbuf2 with %d buffers\n", args
->buffer_count
);
4109 exec2_list
= drm_malloc_ab(sizeof(*exec2_list
), args
->buffer_count
);
4110 if (exec2_list
== NULL
) {
4111 DRM_ERROR("Failed to allocate exec list for %d buffers\n",
4112 args
->buffer_count
);
4115 ret
= copy_from_user(exec2_list
,
4116 (struct drm_i915_relocation_entry __user
*)
4117 (uintptr_t) args
->buffers_ptr
,
4118 sizeof(*exec2_list
) * args
->buffer_count
);
4120 DRM_ERROR("copy %d exec entries failed %d\n",
4121 args
->buffer_count
, ret
);
4122 drm_free_large(exec2_list
);
4126 ret
= i915_gem_do_execbuffer(dev
, data
, file_priv
, args
, exec2_list
);
4128 /* Copy the new buffer offsets back to the user's exec list. */
4129 ret
= copy_to_user((struct drm_i915_relocation_entry __user
*)
4130 (uintptr_t) args
->buffers_ptr
,
4132 sizeof(*exec2_list
) * args
->buffer_count
);
4135 DRM_ERROR("failed to copy %d exec entries "
4136 "back to user (%d)\n",
4137 args
->buffer_count
, ret
);
4141 drm_free_large(exec2_list
);
4146 i915_gem_object_pin(struct drm_gem_object
*obj
, uint32_t alignment
,
4147 bool mappable
, bool need_fence
)
4149 struct drm_device
*dev
= obj
->dev
;
4150 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4151 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4154 BUG_ON(obj_priv
->pin_count
== DRM_I915_GEM_OBJECT_MAX_PIN_COUNT
);
4155 WARN_ON(i915_verify_lists(dev
));
4157 if (obj_priv
->gtt_space
!= NULL
) {
4158 if ((alignment
&& obj_priv
->gtt_offset
& (alignment
- 1)) ||
4159 (need_fence
&& !obj_priv
->fenceable
) ||
4160 (mappable
&& !obj_priv
->mappable
)) {
4161 WARN(obj_priv
->pin_count
,
4162 "bo is already pinned with incorrect alignment:"
4163 " offset=%x, req.alignment=%x, need_fence=%d, fenceable=%d, mappable=%d, cpu_accessible=%d\n",
4164 obj_priv
->gtt_offset
, alignment
,
4165 need_fence
, obj_priv
->fenceable
,
4166 mappable
, obj_priv
->mappable
);
4167 ret
= i915_gem_object_unbind(obj
);
4173 if (obj_priv
->gtt_space
== NULL
) {
4174 ret
= i915_gem_object_bind_to_gtt(obj
, alignment
,
4175 mappable
, need_fence
);
4180 if (obj_priv
->pin_count
++ == 0) {
4181 i915_gem_info_add_pin(dev_priv
, obj_priv
, mappable
);
4182 if (!obj_priv
->active
)
4183 list_move_tail(&obj_priv
->mm_list
,
4184 &dev_priv
->mm
.pinned_list
);
4186 BUG_ON(!obj_priv
->pin_mappable
&& mappable
);
4188 WARN_ON(i915_verify_lists(dev
));
4193 i915_gem_object_unpin(struct drm_gem_object
*obj
)
4195 struct drm_device
*dev
= obj
->dev
;
4196 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4197 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4199 WARN_ON(i915_verify_lists(dev
));
4200 BUG_ON(obj_priv
->pin_count
== 0);
4201 BUG_ON(obj_priv
->gtt_space
== NULL
);
4203 if (--obj_priv
->pin_count
== 0) {
4204 if (!obj_priv
->active
)
4205 list_move_tail(&obj_priv
->mm_list
,
4206 &dev_priv
->mm
.inactive_list
);
4207 i915_gem_info_remove_pin(dev_priv
, obj_priv
);
4209 WARN_ON(i915_verify_lists(dev
));
4213 i915_gem_pin_ioctl(struct drm_device
*dev
, void *data
,
4214 struct drm_file
*file_priv
)
4216 struct drm_i915_gem_pin
*args
= data
;
4217 struct drm_gem_object
*obj
;
4218 struct drm_i915_gem_object
*obj_priv
;
4221 ret
= i915_mutex_lock_interruptible(dev
);
4225 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
4230 obj_priv
= to_intel_bo(obj
);
4232 if (obj_priv
->madv
!= I915_MADV_WILLNEED
) {
4233 DRM_ERROR("Attempting to pin a purgeable buffer\n");
4238 if (obj_priv
->pin_filp
!= NULL
&& obj_priv
->pin_filp
!= file_priv
) {
4239 DRM_ERROR("Already pinned in i915_gem_pin_ioctl(): %d\n",
4245 obj_priv
->user_pin_count
++;
4246 obj_priv
->pin_filp
= file_priv
;
4247 if (obj_priv
->user_pin_count
== 1) {
4248 ret
= i915_gem_object_pin(obj
, args
->alignment
,
4249 true, obj_priv
->tiling_mode
);
4254 /* XXX - flush the CPU caches for pinned objects
4255 * as the X server doesn't manage domains yet
4257 i915_gem_object_flush_cpu_write_domain(obj
);
4258 args
->offset
= obj_priv
->gtt_offset
;
4260 drm_gem_object_unreference(obj
);
4262 mutex_unlock(&dev
->struct_mutex
);
4267 i915_gem_unpin_ioctl(struct drm_device
*dev
, void *data
,
4268 struct drm_file
*file_priv
)
4270 struct drm_i915_gem_pin
*args
= data
;
4271 struct drm_gem_object
*obj
;
4272 struct drm_i915_gem_object
*obj_priv
;
4275 ret
= i915_mutex_lock_interruptible(dev
);
4279 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
4284 obj_priv
= to_intel_bo(obj
);
4286 if (obj_priv
->pin_filp
!= file_priv
) {
4287 DRM_ERROR("Not pinned by caller in i915_gem_pin_ioctl(): %d\n",
4292 obj_priv
->user_pin_count
--;
4293 if (obj_priv
->user_pin_count
== 0) {
4294 obj_priv
->pin_filp
= NULL
;
4295 i915_gem_object_unpin(obj
);
4299 drm_gem_object_unreference(obj
);
4301 mutex_unlock(&dev
->struct_mutex
);
4306 i915_gem_busy_ioctl(struct drm_device
*dev
, void *data
,
4307 struct drm_file
*file_priv
)
4309 struct drm_i915_gem_busy
*args
= data
;
4310 struct drm_gem_object
*obj
;
4311 struct drm_i915_gem_object
*obj_priv
;
4314 ret
= i915_mutex_lock_interruptible(dev
);
4318 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
4323 obj_priv
= to_intel_bo(obj
);
4325 /* Count all active objects as busy, even if they are currently not used
4326 * by the gpu. Users of this interface expect objects to eventually
4327 * become non-busy without any further actions, therefore emit any
4328 * necessary flushes here.
4330 args
->busy
= obj_priv
->active
;
4332 /* Unconditionally flush objects, even when the gpu still uses this
4333 * object. Userspace calling this function indicates that it wants to
4334 * use this buffer rather sooner than later, so issuing the required
4335 * flush earlier is beneficial.
4337 if (obj
->write_domain
& I915_GEM_GPU_DOMAINS
)
4338 i915_gem_flush_ring(dev
, file_priv
,
4340 0, obj
->write_domain
);
4342 /* Update the active list for the hardware's current position.
4343 * Otherwise this only updates on a delayed timer or when irqs
4344 * are actually unmasked, and our working set ends up being
4345 * larger than required.
4347 i915_gem_retire_requests_ring(dev
, obj_priv
->ring
);
4349 args
->busy
= obj_priv
->active
;
4352 drm_gem_object_unreference(obj
);
4354 mutex_unlock(&dev
->struct_mutex
);
4359 i915_gem_throttle_ioctl(struct drm_device
*dev
, void *data
,
4360 struct drm_file
*file_priv
)
4362 return i915_gem_ring_throttle(dev
, file_priv
);
4366 i915_gem_madvise_ioctl(struct drm_device
*dev
, void *data
,
4367 struct drm_file
*file_priv
)
4369 struct drm_i915_gem_madvise
*args
= data
;
4370 struct drm_gem_object
*obj
;
4371 struct drm_i915_gem_object
*obj_priv
;
4374 switch (args
->madv
) {
4375 case I915_MADV_DONTNEED
:
4376 case I915_MADV_WILLNEED
:
4382 ret
= i915_mutex_lock_interruptible(dev
);
4386 obj
= drm_gem_object_lookup(dev
, file_priv
, args
->handle
);
4391 obj_priv
= to_intel_bo(obj
);
4393 if (obj_priv
->pin_count
) {
4398 if (obj_priv
->madv
!= __I915_MADV_PURGED
)
4399 obj_priv
->madv
= args
->madv
;
4401 /* if the object is no longer bound, discard its backing storage */
4402 if (i915_gem_object_is_purgeable(obj_priv
) &&
4403 obj_priv
->gtt_space
== NULL
)
4404 i915_gem_object_truncate(obj
);
4406 args
->retained
= obj_priv
->madv
!= __I915_MADV_PURGED
;
4409 drm_gem_object_unreference(obj
);
4411 mutex_unlock(&dev
->struct_mutex
);
4415 struct drm_gem_object
* i915_gem_alloc_object(struct drm_device
*dev
,
4418 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4419 struct drm_i915_gem_object
*obj
;
4421 obj
= kzalloc(sizeof(*obj
), GFP_KERNEL
);
4425 if (drm_gem_object_init(dev
, &obj
->base
, size
) != 0) {
4430 i915_gem_info_add_obj(dev_priv
, size
);
4432 obj
->base
.write_domain
= I915_GEM_DOMAIN_CPU
;
4433 obj
->base
.read_domains
= I915_GEM_DOMAIN_CPU
;
4435 obj
->agp_type
= AGP_USER_MEMORY
;
4436 obj
->base
.driver_private
= NULL
;
4437 obj
->fence_reg
= I915_FENCE_REG_NONE
;
4438 INIT_LIST_HEAD(&obj
->mm_list
);
4439 INIT_LIST_HEAD(&obj
->ring_list
);
4440 INIT_LIST_HEAD(&obj
->gpu_write_list
);
4441 obj
->madv
= I915_MADV_WILLNEED
;
4442 obj
->fenceable
= true;
4443 obj
->mappable
= true;
4448 int i915_gem_init_object(struct drm_gem_object
*obj
)
4455 static void i915_gem_free_object_tail(struct drm_gem_object
*obj
)
4457 struct drm_device
*dev
= obj
->dev
;
4458 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4459 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4462 ret
= i915_gem_object_unbind(obj
);
4463 if (ret
== -ERESTARTSYS
) {
4464 list_move(&obj_priv
->mm_list
,
4465 &dev_priv
->mm
.deferred_free_list
);
4469 if (obj
->map_list
.map
)
4470 i915_gem_free_mmap_offset(obj
);
4472 drm_gem_object_release(obj
);
4473 i915_gem_info_remove_obj(dev_priv
, obj
->size
);
4475 kfree(obj_priv
->page_cpu_valid
);
4476 kfree(obj_priv
->bit_17
);
4480 void i915_gem_free_object(struct drm_gem_object
*obj
)
4482 struct drm_device
*dev
= obj
->dev
;
4483 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4485 trace_i915_gem_object_destroy(obj
);
4487 while (obj_priv
->pin_count
> 0)
4488 i915_gem_object_unpin(obj
);
4490 if (obj_priv
->phys_obj
)
4491 i915_gem_detach_phys_object(dev
, obj
);
4493 i915_gem_free_object_tail(obj
);
4497 i915_gem_idle(struct drm_device
*dev
)
4499 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4502 mutex_lock(&dev
->struct_mutex
);
4504 if (dev_priv
->mm
.suspended
) {
4505 mutex_unlock(&dev
->struct_mutex
);
4509 ret
= i915_gpu_idle(dev
);
4511 mutex_unlock(&dev
->struct_mutex
);
4515 /* Under UMS, be paranoid and evict. */
4516 if (!drm_core_check_feature(dev
, DRIVER_MODESET
)) {
4517 ret
= i915_gem_evict_inactive(dev
, false);
4519 mutex_unlock(&dev
->struct_mutex
);
4524 /* Hack! Don't let anybody do execbuf while we don't control the chip.
4525 * We need to replace this with a semaphore, or something.
4526 * And not confound mm.suspended!
4528 dev_priv
->mm
.suspended
= 1;
4529 del_timer_sync(&dev_priv
->hangcheck_timer
);
4531 i915_kernel_lost_context(dev
);
4532 i915_gem_cleanup_ringbuffer(dev
);
4534 mutex_unlock(&dev
->struct_mutex
);
4536 /* Cancel the retire work handler, which should be idle now. */
4537 cancel_delayed_work_sync(&dev_priv
->mm
.retire_work
);
4543 * 965+ support PIPE_CONTROL commands, which provide finer grained control
4544 * over cache flushing.
4547 i915_gem_init_pipe_control(struct drm_device
*dev
)
4549 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4550 struct drm_gem_object
*obj
;
4551 struct drm_i915_gem_object
*obj_priv
;
4554 obj
= i915_gem_alloc_object(dev
, 4096);
4556 DRM_ERROR("Failed to allocate seqno page\n");
4560 obj_priv
= to_intel_bo(obj
);
4561 obj_priv
->agp_type
= AGP_USER_CACHED_MEMORY
;
4563 ret
= i915_gem_object_pin(obj
, 4096, true, false);
4567 dev_priv
->seqno_gfx_addr
= obj_priv
->gtt_offset
;
4568 dev_priv
->seqno_page
= kmap(obj_priv
->pages
[0]);
4569 if (dev_priv
->seqno_page
== NULL
)
4572 dev_priv
->seqno_obj
= obj
;
4573 memset(dev_priv
->seqno_page
, 0, PAGE_SIZE
);
4578 i915_gem_object_unpin(obj
);
4580 drm_gem_object_unreference(obj
);
4587 i915_gem_cleanup_pipe_control(struct drm_device
*dev
)
4589 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4590 struct drm_gem_object
*obj
;
4591 struct drm_i915_gem_object
*obj_priv
;
4593 obj
= dev_priv
->seqno_obj
;
4594 obj_priv
= to_intel_bo(obj
);
4595 kunmap(obj_priv
->pages
[0]);
4596 i915_gem_object_unpin(obj
);
4597 drm_gem_object_unreference(obj
);
4598 dev_priv
->seqno_obj
= NULL
;
4600 dev_priv
->seqno_page
= NULL
;
4604 i915_gem_init_ringbuffer(struct drm_device
*dev
)
4606 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4609 if (HAS_PIPE_CONTROL(dev
)) {
4610 ret
= i915_gem_init_pipe_control(dev
);
4615 ret
= intel_init_render_ring_buffer(dev
);
4617 goto cleanup_pipe_control
;
4620 ret
= intel_init_bsd_ring_buffer(dev
);
4622 goto cleanup_render_ring
;
4626 ret
= intel_init_blt_ring_buffer(dev
);
4628 goto cleanup_bsd_ring
;
4631 dev_priv
->next_seqno
= 1;
4636 intel_cleanup_ring_buffer(&dev_priv
->bsd_ring
);
4637 cleanup_render_ring
:
4638 intel_cleanup_ring_buffer(&dev_priv
->render_ring
);
4639 cleanup_pipe_control
:
4640 if (HAS_PIPE_CONTROL(dev
))
4641 i915_gem_cleanup_pipe_control(dev
);
4646 i915_gem_cleanup_ringbuffer(struct drm_device
*dev
)
4648 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4650 intel_cleanup_ring_buffer(&dev_priv
->render_ring
);
4651 intel_cleanup_ring_buffer(&dev_priv
->bsd_ring
);
4652 intel_cleanup_ring_buffer(&dev_priv
->blt_ring
);
4653 if (HAS_PIPE_CONTROL(dev
))
4654 i915_gem_cleanup_pipe_control(dev
);
4658 i915_gem_entervt_ioctl(struct drm_device
*dev
, void *data
,
4659 struct drm_file
*file_priv
)
4661 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4664 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4667 if (atomic_read(&dev_priv
->mm
.wedged
)) {
4668 DRM_ERROR("Reenabling wedged hardware, good luck\n");
4669 atomic_set(&dev_priv
->mm
.wedged
, 0);
4672 mutex_lock(&dev
->struct_mutex
);
4673 dev_priv
->mm
.suspended
= 0;
4675 ret
= i915_gem_init_ringbuffer(dev
);
4677 mutex_unlock(&dev
->struct_mutex
);
4681 BUG_ON(!list_empty(&dev_priv
->mm
.active_list
));
4682 BUG_ON(!list_empty(&dev_priv
->render_ring
.active_list
));
4683 BUG_ON(!list_empty(&dev_priv
->bsd_ring
.active_list
));
4684 BUG_ON(!list_empty(&dev_priv
->blt_ring
.active_list
));
4685 BUG_ON(!list_empty(&dev_priv
->mm
.flushing_list
));
4686 BUG_ON(!list_empty(&dev_priv
->mm
.inactive_list
));
4687 BUG_ON(!list_empty(&dev_priv
->render_ring
.request_list
));
4688 BUG_ON(!list_empty(&dev_priv
->bsd_ring
.request_list
));
4689 BUG_ON(!list_empty(&dev_priv
->blt_ring
.request_list
));
4690 mutex_unlock(&dev
->struct_mutex
);
4692 ret
= drm_irq_install(dev
);
4694 goto cleanup_ringbuffer
;
4699 mutex_lock(&dev
->struct_mutex
);
4700 i915_gem_cleanup_ringbuffer(dev
);
4701 dev_priv
->mm
.suspended
= 1;
4702 mutex_unlock(&dev
->struct_mutex
);
4708 i915_gem_leavevt_ioctl(struct drm_device
*dev
, void *data
,
4709 struct drm_file
*file_priv
)
4711 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4714 drm_irq_uninstall(dev
);
4715 return i915_gem_idle(dev
);
4719 i915_gem_lastclose(struct drm_device
*dev
)
4723 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
4726 ret
= i915_gem_idle(dev
);
4728 DRM_ERROR("failed to idle hardware: %d\n", ret
);
4732 init_ring_lists(struct intel_ring_buffer
*ring
)
4734 INIT_LIST_HEAD(&ring
->active_list
);
4735 INIT_LIST_HEAD(&ring
->request_list
);
4736 INIT_LIST_HEAD(&ring
->gpu_write_list
);
4740 i915_gem_load(struct drm_device
*dev
)
4743 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4745 INIT_LIST_HEAD(&dev_priv
->mm
.active_list
);
4746 INIT_LIST_HEAD(&dev_priv
->mm
.flushing_list
);
4747 INIT_LIST_HEAD(&dev_priv
->mm
.inactive_list
);
4748 INIT_LIST_HEAD(&dev_priv
->mm
.pinned_list
);
4749 INIT_LIST_HEAD(&dev_priv
->mm
.fence_list
);
4750 INIT_LIST_HEAD(&dev_priv
->mm
.deferred_free_list
);
4751 init_ring_lists(&dev_priv
->render_ring
);
4752 init_ring_lists(&dev_priv
->bsd_ring
);
4753 init_ring_lists(&dev_priv
->blt_ring
);
4754 for (i
= 0; i
< 16; i
++)
4755 INIT_LIST_HEAD(&dev_priv
->fence_regs
[i
].lru_list
);
4756 INIT_DELAYED_WORK(&dev_priv
->mm
.retire_work
,
4757 i915_gem_retire_work_handler
);
4758 init_completion(&dev_priv
->error_completion
);
4760 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
4762 u32 tmp
= I915_READ(MI_ARB_STATE
);
4763 if (!(tmp
& MI_ARB_C3_LP_WRITE_ENABLE
)) {
4764 /* arb state is a masked write, so set bit + bit in mask */
4765 tmp
= MI_ARB_C3_LP_WRITE_ENABLE
| (MI_ARB_C3_LP_WRITE_ENABLE
<< MI_ARB_MASK_SHIFT
);
4766 I915_WRITE(MI_ARB_STATE
, tmp
);
4770 /* Old X drivers will take 0-2 for front, back, depth buffers */
4771 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
4772 dev_priv
->fence_reg_start
= 3;
4774 if (INTEL_INFO(dev
)->gen
>= 4 || IS_I945G(dev
) || IS_I945GM(dev
) || IS_G33(dev
))
4775 dev_priv
->num_fence_regs
= 16;
4777 dev_priv
->num_fence_regs
= 8;
4779 /* Initialize fence registers to zero */
4780 switch (INTEL_INFO(dev
)->gen
) {
4782 for (i
= 0; i
< 16; i
++)
4783 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0
+ (i
* 8), 0);
4787 for (i
= 0; i
< 16; i
++)
4788 I915_WRITE64(FENCE_REG_965_0
+ (i
* 8), 0);
4791 if (IS_I945G(dev
) || IS_I945GM(dev
) || IS_G33(dev
))
4792 for (i
= 0; i
< 8; i
++)
4793 I915_WRITE(FENCE_REG_945_8
+ (i
* 4), 0);
4795 for (i
= 0; i
< 8; i
++)
4796 I915_WRITE(FENCE_REG_830_0
+ (i
* 4), 0);
4799 i915_gem_detect_bit_6_swizzle(dev
);
4800 init_waitqueue_head(&dev_priv
->pending_flip_queue
);
4802 dev_priv
->mm
.inactive_shrinker
.shrink
= i915_gem_inactive_shrink
;
4803 dev_priv
->mm
.inactive_shrinker
.seeks
= DEFAULT_SEEKS
;
4804 register_shrinker(&dev_priv
->mm
.inactive_shrinker
);
4808 * Create a physically contiguous memory object for this object
4809 * e.g. for cursor + overlay regs
4811 static int i915_gem_init_phys_object(struct drm_device
*dev
,
4812 int id
, int size
, int align
)
4814 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4815 struct drm_i915_gem_phys_object
*phys_obj
;
4818 if (dev_priv
->mm
.phys_objs
[id
- 1] || !size
)
4821 phys_obj
= kzalloc(sizeof(struct drm_i915_gem_phys_object
), GFP_KERNEL
);
4827 phys_obj
->handle
= drm_pci_alloc(dev
, size
, align
);
4828 if (!phys_obj
->handle
) {
4833 set_memory_wc((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
4836 dev_priv
->mm
.phys_objs
[id
- 1] = phys_obj
;
4844 static void i915_gem_free_phys_object(struct drm_device
*dev
, int id
)
4846 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4847 struct drm_i915_gem_phys_object
*phys_obj
;
4849 if (!dev_priv
->mm
.phys_objs
[id
- 1])
4852 phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4853 if (phys_obj
->cur_obj
) {
4854 i915_gem_detach_phys_object(dev
, phys_obj
->cur_obj
);
4858 set_memory_wb((unsigned long)phys_obj
->handle
->vaddr
, phys_obj
->handle
->size
/ PAGE_SIZE
);
4860 drm_pci_free(dev
, phys_obj
->handle
);
4862 dev_priv
->mm
.phys_objs
[id
- 1] = NULL
;
4865 void i915_gem_free_all_phys_object(struct drm_device
*dev
)
4869 for (i
= I915_GEM_PHYS_CURSOR_0
; i
<= I915_MAX_PHYS_OBJECT
; i
++)
4870 i915_gem_free_phys_object(dev
, i
);
4873 void i915_gem_detach_phys_object(struct drm_device
*dev
,
4874 struct drm_gem_object
*obj
)
4876 struct address_space
*mapping
= obj
->filp
->f_path
.dentry
->d_inode
->i_mapping
;
4877 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4882 if (!obj_priv
->phys_obj
)
4884 vaddr
= obj_priv
->phys_obj
->handle
->vaddr
;
4886 page_count
= obj
->size
/ PAGE_SIZE
;
4888 for (i
= 0; i
< page_count
; i
++) {
4889 struct page
*page
= read_cache_page_gfp(mapping
, i
,
4890 GFP_HIGHUSER
| __GFP_RECLAIMABLE
);
4891 if (!IS_ERR(page
)) {
4892 char *dst
= kmap_atomic(page
);
4893 memcpy(dst
, vaddr
+ i
*PAGE_SIZE
, PAGE_SIZE
);
4896 drm_clflush_pages(&page
, 1);
4898 set_page_dirty(page
);
4899 mark_page_accessed(page
);
4900 page_cache_release(page
);
4903 drm_agp_chipset_flush(dev
);
4905 obj_priv
->phys_obj
->cur_obj
= NULL
;
4906 obj_priv
->phys_obj
= NULL
;
4910 i915_gem_attach_phys_object(struct drm_device
*dev
,
4911 struct drm_gem_object
*obj
,
4915 struct address_space
*mapping
= obj
->filp
->f_path
.dentry
->d_inode
->i_mapping
;
4916 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
4917 struct drm_i915_gem_object
*obj_priv
;
4922 if (id
> I915_MAX_PHYS_OBJECT
)
4925 obj_priv
= to_intel_bo(obj
);
4927 if (obj_priv
->phys_obj
) {
4928 if (obj_priv
->phys_obj
->id
== id
)
4930 i915_gem_detach_phys_object(dev
, obj
);
4933 /* create a new object */
4934 if (!dev_priv
->mm
.phys_objs
[id
- 1]) {
4935 ret
= i915_gem_init_phys_object(dev
, id
,
4938 DRM_ERROR("failed to init phys object %d size: %zu\n", id
, obj
->size
);
4943 /* bind to the object */
4944 obj_priv
->phys_obj
= dev_priv
->mm
.phys_objs
[id
- 1];
4945 obj_priv
->phys_obj
->cur_obj
= obj
;
4947 page_count
= obj
->size
/ PAGE_SIZE
;
4949 for (i
= 0; i
< page_count
; i
++) {
4953 page
= read_cache_page_gfp(mapping
, i
,
4954 GFP_HIGHUSER
| __GFP_RECLAIMABLE
);
4956 return PTR_ERR(page
);
4958 src
= kmap_atomic(page
);
4959 dst
= obj_priv
->phys_obj
->handle
->vaddr
+ (i
* PAGE_SIZE
);
4960 memcpy(dst
, src
, PAGE_SIZE
);
4963 mark_page_accessed(page
);
4964 page_cache_release(page
);
4971 i915_gem_phys_pwrite(struct drm_device
*dev
, struct drm_gem_object
*obj
,
4972 struct drm_i915_gem_pwrite
*args
,
4973 struct drm_file
*file_priv
)
4975 struct drm_i915_gem_object
*obj_priv
= to_intel_bo(obj
);
4978 char __user
*user_data
;
4980 user_data
= (char __user
*) (uintptr_t) args
->data_ptr
;
4981 obj_addr
= obj_priv
->phys_obj
->handle
->vaddr
+ args
->offset
;
4983 DRM_DEBUG_DRIVER("obj_addr %p, %lld\n", obj_addr
, args
->size
);
4984 ret
= copy_from_user(obj_addr
, user_data
, args
->size
);
4988 drm_agp_chipset_flush(dev
);
4992 void i915_gem_release(struct drm_device
*dev
, struct drm_file
*file
)
4994 struct drm_i915_file_private
*file_priv
= file
->driver_priv
;
4996 /* Clean up our request list when the client is going away, so that
4997 * later retire_requests won't dereference our soon-to-be-gone
5000 spin_lock(&file_priv
->mm
.lock
);
5001 while (!list_empty(&file_priv
->mm
.request_list
)) {
5002 struct drm_i915_gem_request
*request
;
5004 request
= list_first_entry(&file_priv
->mm
.request_list
,
5005 struct drm_i915_gem_request
,
5007 list_del(&request
->client_list
);
5008 request
->file_priv
= NULL
;
5010 spin_unlock(&file_priv
->mm
.lock
);
5014 i915_gpu_is_active(struct drm_device
*dev
)
5016 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
5019 lists_empty
= list_empty(&dev_priv
->mm
.flushing_list
) &&
5020 list_empty(&dev_priv
->mm
.active_list
);
5022 return !lists_empty
;
5026 i915_gem_inactive_shrink(struct shrinker
*shrinker
,
5030 struct drm_i915_private
*dev_priv
=
5031 container_of(shrinker
,
5032 struct drm_i915_private
,
5033 mm
.inactive_shrinker
);
5034 struct drm_device
*dev
= dev_priv
->dev
;
5035 struct drm_i915_gem_object
*obj
, *next
;
5038 if (!mutex_trylock(&dev
->struct_mutex
))
5041 /* "fast-path" to count number of available objects */
5042 if (nr_to_scan
== 0) {
5044 list_for_each_entry(obj
,
5045 &dev_priv
->mm
.inactive_list
,
5048 mutex_unlock(&dev
->struct_mutex
);
5049 return cnt
/ 100 * sysctl_vfs_cache_pressure
;
5053 /* first scan for clean buffers */
5054 i915_gem_retire_requests(dev
);
5056 list_for_each_entry_safe(obj
, next
,
5057 &dev_priv
->mm
.inactive_list
,
5059 if (i915_gem_object_is_purgeable(obj
)) {
5060 i915_gem_object_unbind(&obj
->base
);
5061 if (--nr_to_scan
== 0)
5066 /* second pass, evict/count anything still on the inactive list */
5068 list_for_each_entry_safe(obj
, next
,
5069 &dev_priv
->mm
.inactive_list
,
5072 i915_gem_object_unbind(&obj
->base
);
5078 if (nr_to_scan
&& i915_gpu_is_active(dev
)) {
5080 * We are desperate for pages, so as a last resort, wait
5081 * for the GPU to finish and discard whatever we can.
5082 * This has a dramatic impact to reduce the number of
5083 * OOM-killer events whilst running the GPU aggressively.
5085 if (i915_gpu_idle(dev
) == 0)
5088 mutex_unlock(&dev
->struct_mutex
);
5089 return cnt
/ 100 * sysctl_vfs_cache_pressure
;