2 * Copyright © 2008-2015 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eric Anholt <eric@anholt.net>
29 #include <drm/drm_vma_manager.h>
30 #include <drm/i915_drm.h>
32 #include "i915_vgpu.h"
33 #include "i915_trace.h"
34 #include "intel_drv.h"
35 #include <linux/shmem_fs.h>
36 #include <linux/slab.h>
37 #include <linux/swap.h>
38 #include <linux/pci.h>
39 #include <linux/dma-buf.h>
41 static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj);
42 static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj);
43 static __must_check int
44 i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj,
47 i915_gem_object_retire(struct drm_i915_gem_object *obj);
49 static void i915_gem_write_fence(struct drm_device *dev, int reg,
50 struct drm_i915_gem_object *obj);
51 static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj,
52 struct drm_i915_fence_reg *fence,
55 static bool cpu_cache_is_coherent(struct drm_device *dev,
56 enum i915_cache_level level)
58 return HAS_LLC(dev) || level != I915_CACHE_NONE;
61 static bool cpu_write_needs_clflush(struct drm_i915_gem_object *obj)
63 if (!cpu_cache_is_coherent(obj->base.dev, obj->cache_level))
66 return obj->pin_display;
69 static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj)
72 i915_gem_release_mmap(obj);
74 /* As we do not have an associated fence register, we will force
75 * a tiling change if we ever need to acquire one.
77 obj->fence_dirty = false;
78 obj->fence_reg = I915_FENCE_REG_NONE;
81 /* some bookkeeping */
82 static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv,
85 spin_lock(&dev_priv->mm.object_stat_lock);
86 dev_priv->mm.object_count++;
87 dev_priv->mm.object_memory += size;
88 spin_unlock(&dev_priv->mm.object_stat_lock);
91 static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv,
94 spin_lock(&dev_priv->mm.object_stat_lock);
95 dev_priv->mm.object_count--;
96 dev_priv->mm.object_memory -= size;
97 spin_unlock(&dev_priv->mm.object_stat_lock);
101 i915_gem_wait_for_error(struct i915_gpu_error *error)
105 #define EXIT_COND (!i915_reset_in_progress(error) || \
106 i915_terminally_wedged(error))
111 * Only wait 10 seconds for the gpu reset to complete to avoid hanging
112 * userspace. If it takes that long something really bad is going on and
113 * we should simply try to bail out and fail as gracefully as possible.
115 ret = wait_event_interruptible_timeout(error->reset_queue,
119 DRM_ERROR("Timed out waiting for the gpu reset to complete\n");
121 } else if (ret < 0) {
129 int i915_mutex_lock_interruptible(struct drm_device *dev)
131 struct drm_i915_private *dev_priv = dev->dev_private;
134 ret = i915_gem_wait_for_error(&dev_priv->gpu_error);
138 ret = mutex_lock_interruptible(&dev->struct_mutex);
142 WARN_ON(i915_verify_lists(dev));
147 i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
148 struct drm_file *file)
150 struct drm_i915_private *dev_priv = dev->dev_private;
151 struct drm_i915_gem_get_aperture *args = data;
152 struct drm_i915_gem_object *obj;
156 mutex_lock(&dev->struct_mutex);
157 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
158 if (i915_gem_obj_is_pinned(obj))
159 pinned += i915_gem_obj_ggtt_size(obj);
160 mutex_unlock(&dev->struct_mutex);
162 args->aper_size = dev_priv->gtt.base.total;
163 args->aper_available_size = args->aper_size - pinned;
169 i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj)
171 struct address_space *mapping = file_inode(obj->base.filp)->i_mapping;
172 char *vaddr = obj->phys_handle->vaddr;
174 struct scatterlist *sg;
177 if (WARN_ON(i915_gem_object_needs_bit17_swizzle(obj)))
180 for (i = 0; i < obj->base.size / PAGE_SIZE; i++) {
184 page = shmem_read_mapping_page(mapping, i);
186 return PTR_ERR(page);
188 src = kmap_atomic(page);
189 memcpy(vaddr, src, PAGE_SIZE);
190 drm_clflush_virt_range(vaddr, PAGE_SIZE);
193 page_cache_release(page);
197 i915_gem_chipset_flush(obj->base.dev);
199 st = kmalloc(sizeof(*st), GFP_KERNEL);
203 if (sg_alloc_table(st, 1, GFP_KERNEL)) {
210 sg->length = obj->base.size;
212 sg_dma_address(sg) = obj->phys_handle->busaddr;
213 sg_dma_len(sg) = obj->base.size;
216 obj->has_dma_mapping = true;
221 i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj)
225 BUG_ON(obj->madv == __I915_MADV_PURGED);
227 ret = i915_gem_object_set_to_cpu_domain(obj, true);
229 /* In the event of a disaster, abandon all caches and
232 WARN_ON(ret != -EIO);
233 obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU;
236 if (obj->madv == I915_MADV_DONTNEED)
240 struct address_space *mapping = file_inode(obj->base.filp)->i_mapping;
241 char *vaddr = obj->phys_handle->vaddr;
244 for (i = 0; i < obj->base.size / PAGE_SIZE; i++) {
248 page = shmem_read_mapping_page(mapping, i);
252 dst = kmap_atomic(page);
253 drm_clflush_virt_range(vaddr, PAGE_SIZE);
254 memcpy(dst, vaddr, PAGE_SIZE);
257 set_page_dirty(page);
258 if (obj->madv == I915_MADV_WILLNEED)
259 mark_page_accessed(page);
260 page_cache_release(page);
266 sg_free_table(obj->pages);
269 obj->has_dma_mapping = false;
273 i915_gem_object_release_phys(struct drm_i915_gem_object *obj)
275 drm_pci_free(obj->base.dev, obj->phys_handle);
278 static const struct drm_i915_gem_object_ops i915_gem_phys_ops = {
279 .get_pages = i915_gem_object_get_pages_phys,
280 .put_pages = i915_gem_object_put_pages_phys,
281 .release = i915_gem_object_release_phys,
285 drop_pages(struct drm_i915_gem_object *obj)
287 struct i915_vma *vma, *next;
290 drm_gem_object_reference(&obj->base);
291 list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link)
292 if (i915_vma_unbind(vma))
295 ret = i915_gem_object_put_pages(obj);
296 drm_gem_object_unreference(&obj->base);
302 i915_gem_object_attach_phys(struct drm_i915_gem_object *obj,
305 drm_dma_handle_t *phys;
308 if (obj->phys_handle) {
309 if ((unsigned long)obj->phys_handle->vaddr & (align -1))
315 if (obj->madv != I915_MADV_WILLNEED)
318 if (obj->base.filp == NULL)
321 ret = drop_pages(obj);
325 /* create a new object */
326 phys = drm_pci_alloc(obj->base.dev, obj->base.size, align);
330 obj->phys_handle = phys;
331 obj->ops = &i915_gem_phys_ops;
333 return i915_gem_object_get_pages(obj);
337 i915_gem_phys_pwrite(struct drm_i915_gem_object *obj,
338 struct drm_i915_gem_pwrite *args,
339 struct drm_file *file_priv)
341 struct drm_device *dev = obj->base.dev;
342 void *vaddr = obj->phys_handle->vaddr + args->offset;
343 char __user *user_data = to_user_ptr(args->data_ptr);
346 /* We manually control the domain here and pretend that it
347 * remains coherent i.e. in the GTT domain, like shmem_pwrite.
349 ret = i915_gem_object_wait_rendering(obj, false);
353 intel_fb_obj_invalidate(obj, NULL, ORIGIN_CPU);
354 if (__copy_from_user_inatomic_nocache(vaddr, user_data, args->size)) {
355 unsigned long unwritten;
357 /* The physical object once assigned is fixed for the lifetime
358 * of the obj, so we can safely drop the lock and continue
361 mutex_unlock(&dev->struct_mutex);
362 unwritten = copy_from_user(vaddr, user_data, args->size);
363 mutex_lock(&dev->struct_mutex);
370 drm_clflush_virt_range(vaddr, args->size);
371 i915_gem_chipset_flush(dev);
374 intel_fb_obj_flush(obj, false);
378 void *i915_gem_object_alloc(struct drm_device *dev)
380 struct drm_i915_private *dev_priv = dev->dev_private;
381 return kmem_cache_zalloc(dev_priv->objects, GFP_KERNEL);
384 void i915_gem_object_free(struct drm_i915_gem_object *obj)
386 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
387 kmem_cache_free(dev_priv->objects, obj);
391 i915_gem_create(struct drm_file *file,
392 struct drm_device *dev,
396 struct drm_i915_gem_object *obj;
400 size = roundup(size, PAGE_SIZE);
404 /* Allocate the new object */
405 obj = i915_gem_alloc_object(dev, size);
409 ret = drm_gem_handle_create(file, &obj->base, &handle);
410 /* drop reference from allocate - handle holds it now */
411 drm_gem_object_unreference_unlocked(&obj->base);
420 i915_gem_dumb_create(struct drm_file *file,
421 struct drm_device *dev,
422 struct drm_mode_create_dumb *args)
424 /* have to work out size/pitch and return them */
425 args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 64);
426 args->size = args->pitch * args->height;
427 return i915_gem_create(file, dev,
428 args->size, &args->handle);
432 * Creates a new mm object and returns a handle to it.
435 i915_gem_create_ioctl(struct drm_device *dev, void *data,
436 struct drm_file *file)
438 struct drm_i915_gem_create *args = data;
440 return i915_gem_create(file, dev,
441 args->size, &args->handle);
445 __copy_to_user_swizzled(char __user *cpu_vaddr,
446 const char *gpu_vaddr, int gpu_offset,
449 int ret, cpu_offset = 0;
452 int cacheline_end = ALIGN(gpu_offset + 1, 64);
453 int this_length = min(cacheline_end - gpu_offset, length);
454 int swizzled_gpu_offset = gpu_offset ^ 64;
456 ret = __copy_to_user(cpu_vaddr + cpu_offset,
457 gpu_vaddr + swizzled_gpu_offset,
462 cpu_offset += this_length;
463 gpu_offset += this_length;
464 length -= this_length;
471 __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset,
472 const char __user *cpu_vaddr,
475 int ret, cpu_offset = 0;
478 int cacheline_end = ALIGN(gpu_offset + 1, 64);
479 int this_length = min(cacheline_end - gpu_offset, length);
480 int swizzled_gpu_offset = gpu_offset ^ 64;
482 ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset,
483 cpu_vaddr + cpu_offset,
488 cpu_offset += this_length;
489 gpu_offset += this_length;
490 length -= this_length;
497 * Pins the specified object's pages and synchronizes the object with
498 * GPU accesses. Sets needs_clflush to non-zero if the caller should
499 * flush the object from the CPU cache.
501 int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj,
511 if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) {
512 /* If we're not in the cpu read domain, set ourself into the gtt
513 * read domain and manually flush cachelines (if required). This
514 * optimizes for the case when the gpu will dirty the data
515 * anyway again before the next pread happens. */
516 *needs_clflush = !cpu_cache_is_coherent(obj->base.dev,
518 ret = i915_gem_object_wait_rendering(obj, true);
522 i915_gem_object_retire(obj);
525 ret = i915_gem_object_get_pages(obj);
529 i915_gem_object_pin_pages(obj);
534 /* Per-page copy function for the shmem pread fastpath.
535 * Flushes invalid cachelines before reading the target if
536 * needs_clflush is set. */
538 shmem_pread_fast(struct page *page, int shmem_page_offset, int page_length,
539 char __user *user_data,
540 bool page_do_bit17_swizzling, bool needs_clflush)
545 if (unlikely(page_do_bit17_swizzling))
548 vaddr = kmap_atomic(page);
550 drm_clflush_virt_range(vaddr + shmem_page_offset,
552 ret = __copy_to_user_inatomic(user_data,
553 vaddr + shmem_page_offset,
555 kunmap_atomic(vaddr);
557 return ret ? -EFAULT : 0;
561 shmem_clflush_swizzled_range(char *addr, unsigned long length,
564 if (unlikely(swizzled)) {
565 unsigned long start = (unsigned long) addr;
566 unsigned long end = (unsigned long) addr + length;
568 /* For swizzling simply ensure that we always flush both
569 * channels. Lame, but simple and it works. Swizzled
570 * pwrite/pread is far from a hotpath - current userspace
571 * doesn't use it at all. */
572 start = round_down(start, 128);
573 end = round_up(end, 128);
575 drm_clflush_virt_range((void *)start, end - start);
577 drm_clflush_virt_range(addr, length);
582 /* Only difference to the fast-path function is that this can handle bit17
583 * and uses non-atomic copy and kmap functions. */
585 shmem_pread_slow(struct page *page, int shmem_page_offset, int page_length,
586 char __user *user_data,
587 bool page_do_bit17_swizzling, bool needs_clflush)
594 shmem_clflush_swizzled_range(vaddr + shmem_page_offset,
596 page_do_bit17_swizzling);
598 if (page_do_bit17_swizzling)
599 ret = __copy_to_user_swizzled(user_data,
600 vaddr, shmem_page_offset,
603 ret = __copy_to_user(user_data,
604 vaddr + shmem_page_offset,
608 return ret ? - EFAULT : 0;
612 i915_gem_shmem_pread(struct drm_device *dev,
613 struct drm_i915_gem_object *obj,
614 struct drm_i915_gem_pread *args,
615 struct drm_file *file)
617 char __user *user_data;
620 int shmem_page_offset, page_length, ret = 0;
621 int obj_do_bit17_swizzling, page_do_bit17_swizzling;
623 int needs_clflush = 0;
624 struct sg_page_iter sg_iter;
626 user_data = to_user_ptr(args->data_ptr);
629 obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
631 ret = i915_gem_obj_prepare_shmem_read(obj, &needs_clflush);
635 offset = args->offset;
637 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents,
638 offset >> PAGE_SHIFT) {
639 struct page *page = sg_page_iter_page(&sg_iter);
644 /* Operation in this page
646 * shmem_page_offset = offset within page in shmem file
647 * page_length = bytes to copy for this page
649 shmem_page_offset = offset_in_page(offset);
650 page_length = remain;
651 if ((shmem_page_offset + page_length) > PAGE_SIZE)
652 page_length = PAGE_SIZE - shmem_page_offset;
654 page_do_bit17_swizzling = obj_do_bit17_swizzling &&
655 (page_to_phys(page) & (1 << 17)) != 0;
657 ret = shmem_pread_fast(page, shmem_page_offset, page_length,
658 user_data, page_do_bit17_swizzling,
663 mutex_unlock(&dev->struct_mutex);
665 if (likely(!i915.prefault_disable) && !prefaulted) {
666 ret = fault_in_multipages_writeable(user_data, remain);
667 /* Userspace is tricking us, but we've already clobbered
668 * its pages with the prefault and promised to write the
669 * data up to the first fault. Hence ignore any errors
670 * and just continue. */
675 ret = shmem_pread_slow(page, shmem_page_offset, page_length,
676 user_data, page_do_bit17_swizzling,
679 mutex_lock(&dev->struct_mutex);
685 remain -= page_length;
686 user_data += page_length;
687 offset += page_length;
691 i915_gem_object_unpin_pages(obj);
697 * Reads data from the object referenced by handle.
699 * On error, the contents of *data are undefined.
702 i915_gem_pread_ioctl(struct drm_device *dev, void *data,
703 struct drm_file *file)
705 struct drm_i915_gem_pread *args = data;
706 struct drm_i915_gem_object *obj;
712 if (!access_ok(VERIFY_WRITE,
713 to_user_ptr(args->data_ptr),
717 ret = i915_mutex_lock_interruptible(dev);
721 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
722 if (&obj->base == NULL) {
727 /* Bounds check source. */
728 if (args->offset > obj->base.size ||
729 args->size > obj->base.size - args->offset) {
734 /* prime objects have no backing filp to GEM pread/pwrite
737 if (!obj->base.filp) {
742 trace_i915_gem_object_pread(obj, args->offset, args->size);
744 ret = i915_gem_shmem_pread(dev, obj, args, file);
747 drm_gem_object_unreference(&obj->base);
749 mutex_unlock(&dev->struct_mutex);
753 /* This is the fast write path which cannot handle
754 * page faults in the source data
758 fast_user_write(struct io_mapping *mapping,
759 loff_t page_base, int page_offset,
760 char __user *user_data,
763 void __iomem *vaddr_atomic;
765 unsigned long unwritten;
767 vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base);
768 /* We can use the cpu mem copy function because this is X86. */
769 vaddr = (void __force*)vaddr_atomic + page_offset;
770 unwritten = __copy_from_user_inatomic_nocache(vaddr,
772 io_mapping_unmap_atomic(vaddr_atomic);
777 * This is the fast pwrite path, where we copy the data directly from the
778 * user into the GTT, uncached.
781 i915_gem_gtt_pwrite_fast(struct drm_device *dev,
782 struct drm_i915_gem_object *obj,
783 struct drm_i915_gem_pwrite *args,
784 struct drm_file *file)
786 struct drm_i915_private *dev_priv = dev->dev_private;
788 loff_t offset, page_base;
789 char __user *user_data;
790 int page_offset, page_length, ret;
792 ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE | PIN_NONBLOCK);
796 ret = i915_gem_object_set_to_gtt_domain(obj, true);
800 ret = i915_gem_object_put_fence(obj);
804 user_data = to_user_ptr(args->data_ptr);
807 offset = i915_gem_obj_ggtt_offset(obj) + args->offset;
809 intel_fb_obj_invalidate(obj, NULL, ORIGIN_GTT);
812 /* Operation in this page
814 * page_base = page offset within aperture
815 * page_offset = offset within page
816 * page_length = bytes to copy for this page
818 page_base = offset & PAGE_MASK;
819 page_offset = offset_in_page(offset);
820 page_length = remain;
821 if ((page_offset + remain) > PAGE_SIZE)
822 page_length = PAGE_SIZE - page_offset;
824 /* If we get a fault while copying data, then (presumably) our
825 * source page isn't available. Return the error and we'll
826 * retry in the slow path.
828 if (fast_user_write(dev_priv->gtt.mappable, page_base,
829 page_offset, user_data, page_length)) {
834 remain -= page_length;
835 user_data += page_length;
836 offset += page_length;
840 intel_fb_obj_flush(obj, false);
842 i915_gem_object_ggtt_unpin(obj);
847 /* Per-page copy function for the shmem pwrite fastpath.
848 * Flushes invalid cachelines before writing to the target if
849 * needs_clflush_before is set and flushes out any written cachelines after
850 * writing if needs_clflush is set. */
852 shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length,
853 char __user *user_data,
854 bool page_do_bit17_swizzling,
855 bool needs_clflush_before,
856 bool needs_clflush_after)
861 if (unlikely(page_do_bit17_swizzling))
864 vaddr = kmap_atomic(page);
865 if (needs_clflush_before)
866 drm_clflush_virt_range(vaddr + shmem_page_offset,
868 ret = __copy_from_user_inatomic(vaddr + shmem_page_offset,
869 user_data, page_length);
870 if (needs_clflush_after)
871 drm_clflush_virt_range(vaddr + shmem_page_offset,
873 kunmap_atomic(vaddr);
875 return ret ? -EFAULT : 0;
878 /* Only difference to the fast-path function is that this can handle bit17
879 * and uses non-atomic copy and kmap functions. */
881 shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length,
882 char __user *user_data,
883 bool page_do_bit17_swizzling,
884 bool needs_clflush_before,
885 bool needs_clflush_after)
891 if (unlikely(needs_clflush_before || page_do_bit17_swizzling))
892 shmem_clflush_swizzled_range(vaddr + shmem_page_offset,
894 page_do_bit17_swizzling);
895 if (page_do_bit17_swizzling)
896 ret = __copy_from_user_swizzled(vaddr, shmem_page_offset,
900 ret = __copy_from_user(vaddr + shmem_page_offset,
903 if (needs_clflush_after)
904 shmem_clflush_swizzled_range(vaddr + shmem_page_offset,
906 page_do_bit17_swizzling);
909 return ret ? -EFAULT : 0;
913 i915_gem_shmem_pwrite(struct drm_device *dev,
914 struct drm_i915_gem_object *obj,
915 struct drm_i915_gem_pwrite *args,
916 struct drm_file *file)
920 char __user *user_data;
921 int shmem_page_offset, page_length, ret = 0;
922 int obj_do_bit17_swizzling, page_do_bit17_swizzling;
923 int hit_slowpath = 0;
924 int needs_clflush_after = 0;
925 int needs_clflush_before = 0;
926 struct sg_page_iter sg_iter;
928 user_data = to_user_ptr(args->data_ptr);
931 obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
933 if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
934 /* If we're not in the cpu write domain, set ourself into the gtt
935 * write domain and manually flush cachelines (if required). This
936 * optimizes for the case when the gpu will use the data
937 * right away and we therefore have to clflush anyway. */
938 needs_clflush_after = cpu_write_needs_clflush(obj);
939 ret = i915_gem_object_wait_rendering(obj, false);
943 i915_gem_object_retire(obj);
945 /* Same trick applies to invalidate partially written cachelines read
947 if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0)
948 needs_clflush_before =
949 !cpu_cache_is_coherent(dev, obj->cache_level);
951 ret = i915_gem_object_get_pages(obj);
955 intel_fb_obj_invalidate(obj, NULL, ORIGIN_CPU);
957 i915_gem_object_pin_pages(obj);
959 offset = args->offset;
962 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents,
963 offset >> PAGE_SHIFT) {
964 struct page *page = sg_page_iter_page(&sg_iter);
965 int partial_cacheline_write;
970 /* Operation in this page
972 * shmem_page_offset = offset within page in shmem file
973 * page_length = bytes to copy for this page
975 shmem_page_offset = offset_in_page(offset);
977 page_length = remain;
978 if ((shmem_page_offset + page_length) > PAGE_SIZE)
979 page_length = PAGE_SIZE - shmem_page_offset;
981 /* If we don't overwrite a cacheline completely we need to be
982 * careful to have up-to-date data by first clflushing. Don't
983 * overcomplicate things and flush the entire patch. */
984 partial_cacheline_write = needs_clflush_before &&
985 ((shmem_page_offset | page_length)
986 & (boot_cpu_data.x86_clflush_size - 1));
988 page_do_bit17_swizzling = obj_do_bit17_swizzling &&
989 (page_to_phys(page) & (1 << 17)) != 0;
991 ret = shmem_pwrite_fast(page, shmem_page_offset, page_length,
992 user_data, page_do_bit17_swizzling,
993 partial_cacheline_write,
994 needs_clflush_after);
999 mutex_unlock(&dev->struct_mutex);
1000 ret = shmem_pwrite_slow(page, shmem_page_offset, page_length,
1001 user_data, page_do_bit17_swizzling,
1002 partial_cacheline_write,
1003 needs_clflush_after);
1005 mutex_lock(&dev->struct_mutex);
1011 remain -= page_length;
1012 user_data += page_length;
1013 offset += page_length;
1017 i915_gem_object_unpin_pages(obj);
1021 * Fixup: Flush cpu caches in case we didn't flush the dirty
1022 * cachelines in-line while writing and the object moved
1023 * out of the cpu write domain while we've dropped the lock.
1025 if (!needs_clflush_after &&
1026 obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
1027 if (i915_gem_clflush_object(obj, obj->pin_display))
1028 i915_gem_chipset_flush(dev);
1032 if (needs_clflush_after)
1033 i915_gem_chipset_flush(dev);
1035 intel_fb_obj_flush(obj, false);
1040 * Writes data to the object referenced by handle.
1042 * On error, the contents of the buffer that were to be modified are undefined.
1045 i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
1046 struct drm_file *file)
1048 struct drm_i915_private *dev_priv = dev->dev_private;
1049 struct drm_i915_gem_pwrite *args = data;
1050 struct drm_i915_gem_object *obj;
1053 if (args->size == 0)
1056 if (!access_ok(VERIFY_READ,
1057 to_user_ptr(args->data_ptr),
1061 if (likely(!i915.prefault_disable)) {
1062 ret = fault_in_multipages_readable(to_user_ptr(args->data_ptr),
1068 intel_runtime_pm_get(dev_priv);
1070 ret = i915_mutex_lock_interruptible(dev);
1074 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
1075 if (&obj->base == NULL) {
1080 /* Bounds check destination. */
1081 if (args->offset > obj->base.size ||
1082 args->size > obj->base.size - args->offset) {
1087 /* prime objects have no backing filp to GEM pread/pwrite
1090 if (!obj->base.filp) {
1095 trace_i915_gem_object_pwrite(obj, args->offset, args->size);
1098 /* We can only do the GTT pwrite on untiled buffers, as otherwise
1099 * it would end up going through the fenced access, and we'll get
1100 * different detiling behavior between reading and writing.
1101 * pread/pwrite currently are reading and writing from the CPU
1102 * perspective, requiring manual detiling by the client.
1104 if (obj->tiling_mode == I915_TILING_NONE &&
1105 obj->base.write_domain != I915_GEM_DOMAIN_CPU &&
1106 cpu_write_needs_clflush(obj)) {
1107 ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file);
1108 /* Note that the gtt paths might fail with non-page-backed user
1109 * pointers (e.g. gtt mappings when moving data between
1110 * textures). Fallback to the shmem path in that case. */
1113 if (ret == -EFAULT || ret == -ENOSPC) {
1114 if (obj->phys_handle)
1115 ret = i915_gem_phys_pwrite(obj, args, file);
1117 ret = i915_gem_shmem_pwrite(dev, obj, args, file);
1121 drm_gem_object_unreference(&obj->base);
1123 mutex_unlock(&dev->struct_mutex);
1125 intel_runtime_pm_put(dev_priv);
1131 i915_gem_check_wedge(struct i915_gpu_error *error,
1134 if (i915_reset_in_progress(error)) {
1135 /* Non-interruptible callers can't handle -EAGAIN, hence return
1136 * -EIO unconditionally for these. */
1140 /* Recovery complete, but the reset failed ... */
1141 if (i915_terminally_wedged(error))
1145 * Check if GPU Reset is in progress - we need intel_ring_begin
1146 * to work properly to reinit the hw state while the gpu is
1147 * still marked as reset-in-progress. Handle this with a flag.
1149 if (!error->reload_in_reset)
1157 * Compare arbitrary request against outstanding lazy request. Emit on match.
1160 i915_gem_check_olr(struct drm_i915_gem_request *req)
1164 WARN_ON(!mutex_is_locked(&req->ring->dev->struct_mutex));
1167 if (req == req->ring->outstanding_lazy_request)
1168 ret = i915_add_request(req->ring);
1173 static void fake_irq(unsigned long data)
1175 wake_up_process((struct task_struct *)data);
1178 static bool missed_irq(struct drm_i915_private *dev_priv,
1179 struct intel_engine_cs *ring)
1181 return test_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings);
1184 static int __i915_spin_request(struct drm_i915_gem_request *rq)
1186 unsigned long timeout;
1188 if (i915_gem_request_get_ring(rq)->irq_refcount)
1191 timeout = jiffies + 1;
1192 while (!need_resched()) {
1193 if (i915_gem_request_completed(rq, true))
1196 if (time_after_eq(jiffies, timeout))
1199 cpu_relax_lowlatency();
1201 if (i915_gem_request_completed(rq, false))
1208 * __i915_wait_request - wait until execution of request has finished
1210 * @reset_counter: reset sequence associated with the given request
1211 * @interruptible: do an interruptible wait (normally yes)
1212 * @timeout: in - how long to wait (NULL forever); out - how much time remaining
1214 * Note: It is of utmost importance that the passed in seqno and reset_counter
1215 * values have been read by the caller in an smp safe manner. Where read-side
1216 * locks are involved, it is sufficient to read the reset_counter before
1217 * unlocking the lock that protects the seqno. For lockless tricks, the
1218 * reset_counter _must_ be read before, and an appropriate smp_rmb must be
1221 * Returns 0 if the request was found within the alloted time. Else returns the
1222 * errno with remaining time filled in timeout argument.
1224 int __i915_wait_request(struct drm_i915_gem_request *req,
1225 unsigned reset_counter,
1228 struct drm_i915_file_private *file_priv)
1230 struct intel_engine_cs *ring = i915_gem_request_get_ring(req);
1231 struct drm_device *dev = ring->dev;
1232 struct drm_i915_private *dev_priv = dev->dev_private;
1233 const bool irq_test_in_progress =
1234 ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_ring_flag(ring);
1236 unsigned long timeout_expire;
1240 WARN(!intel_irqs_enabled(dev_priv), "IRQs disabled");
1242 if (i915_gem_request_completed(req, true))
1245 timeout_expire = timeout ?
1246 jiffies + nsecs_to_jiffies_timeout((u64)*timeout) : 0;
1248 if (INTEL_INFO(dev)->gen >= 6)
1249 gen6_rps_boost(dev_priv, file_priv);
1251 /* Record current time in case interrupted by signal, or wedged */
1252 trace_i915_gem_request_wait_begin(req);
1253 before = ktime_get_raw_ns();
1255 /* Optimistic spin for the next jiffie before touching IRQs */
1256 ret = __i915_spin_request(req);
1260 if (!irq_test_in_progress && WARN_ON(!ring->irq_get(ring))) {
1266 struct timer_list timer;
1268 prepare_to_wait(&ring->irq_queue, &wait,
1269 interruptible ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
1271 /* We need to check whether any gpu reset happened in between
1272 * the caller grabbing the seqno and now ... */
1273 if (reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter)) {
1274 /* ... but upgrade the -EAGAIN to an -EIO if the gpu
1275 * is truely gone. */
1276 ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible);
1282 if (i915_gem_request_completed(req, false)) {
1287 if (interruptible && signal_pending(current)) {
1292 if (timeout && time_after_eq(jiffies, timeout_expire)) {
1297 timer.function = NULL;
1298 if (timeout || missed_irq(dev_priv, ring)) {
1299 unsigned long expire;
1301 setup_timer_on_stack(&timer, fake_irq, (unsigned long)current);
1302 expire = missed_irq(dev_priv, ring) ? jiffies + 1 : timeout_expire;
1303 mod_timer(&timer, expire);
1308 if (timer.function) {
1309 del_singleshot_timer_sync(&timer);
1310 destroy_timer_on_stack(&timer);
1313 if (!irq_test_in_progress)
1314 ring->irq_put(ring);
1316 finish_wait(&ring->irq_queue, &wait);
1319 now = ktime_get_raw_ns();
1320 trace_i915_gem_request_wait_end(req);
1323 s64 tres = *timeout - (now - before);
1325 *timeout = tres < 0 ? 0 : tres;
1328 * Apparently ktime isn't accurate enough and occasionally has a
1329 * bit of mismatch in the jiffies<->nsecs<->ktime loop. So patch
1330 * things up to make the test happy. We allow up to 1 jiffy.
1332 * This is a regrssion from the timespec->ktime conversion.
1334 if (ret == -ETIME && *timeout < jiffies_to_usecs(1)*1000)
1342 * Waits for a request to be signaled, and cleans up the
1343 * request and object lists appropriately for that event.
1346 i915_wait_request(struct drm_i915_gem_request *req)
1348 struct drm_device *dev;
1349 struct drm_i915_private *dev_priv;
1351 unsigned reset_counter;
1354 BUG_ON(req == NULL);
1356 dev = req->ring->dev;
1357 dev_priv = dev->dev_private;
1358 interruptible = dev_priv->mm.interruptible;
1360 BUG_ON(!mutex_is_locked(&dev->struct_mutex));
1362 ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible);
1366 ret = i915_gem_check_olr(req);
1370 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
1371 i915_gem_request_reference(req);
1372 ret = __i915_wait_request(req, reset_counter,
1373 interruptible, NULL, NULL);
1374 i915_gem_request_unreference(req);
1379 i915_gem_object_wait_rendering__tail(struct drm_i915_gem_object *obj)
1384 /* Manually manage the write flush as we may have not yet
1385 * retired the buffer.
1387 * Note that the last_write_req is always the earlier of
1388 * the two (read/write) requests, so if we haved successfully waited,
1389 * we know we have passed the last write.
1391 i915_gem_request_assign(&obj->last_write_req, NULL);
1397 * Ensures that all rendering to the object has completed and the object is
1398 * safe to unbind from the GTT or access from the CPU.
1400 static __must_check int
1401 i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj,
1404 struct drm_i915_gem_request *req;
1407 req = readonly ? obj->last_write_req : obj->last_read_req;
1411 ret = i915_wait_request(req);
1415 return i915_gem_object_wait_rendering__tail(obj);
1418 /* A nonblocking variant of the above wait. This is a highly dangerous routine
1419 * as the object state may change during this call.
1421 static __must_check int
1422 i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj,
1423 struct drm_i915_file_private *file_priv,
1426 struct drm_i915_gem_request *req;
1427 struct drm_device *dev = obj->base.dev;
1428 struct drm_i915_private *dev_priv = dev->dev_private;
1429 unsigned reset_counter;
1432 BUG_ON(!mutex_is_locked(&dev->struct_mutex));
1433 BUG_ON(!dev_priv->mm.interruptible);
1435 req = readonly ? obj->last_write_req : obj->last_read_req;
1439 ret = i915_gem_check_wedge(&dev_priv->gpu_error, true);
1443 ret = i915_gem_check_olr(req);
1447 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
1448 i915_gem_request_reference(req);
1449 mutex_unlock(&dev->struct_mutex);
1450 ret = __i915_wait_request(req, reset_counter, true, NULL, file_priv);
1451 mutex_lock(&dev->struct_mutex);
1452 i915_gem_request_unreference(req);
1456 return i915_gem_object_wait_rendering__tail(obj);
1460 * Called when user space prepares to use an object with the CPU, either
1461 * through the mmap ioctl's mapping or a GTT mapping.
1464 i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
1465 struct drm_file *file)
1467 struct drm_i915_gem_set_domain *args = data;
1468 struct drm_i915_gem_object *obj;
1469 uint32_t read_domains = args->read_domains;
1470 uint32_t write_domain = args->write_domain;
1473 /* Only handle setting domains to types used by the CPU. */
1474 if (write_domain & I915_GEM_GPU_DOMAINS)
1477 if (read_domains & I915_GEM_GPU_DOMAINS)
1480 /* Having something in the write domain implies it's in the read
1481 * domain, and only that read domain. Enforce that in the request.
1483 if (write_domain != 0 && read_domains != write_domain)
1486 ret = i915_mutex_lock_interruptible(dev);
1490 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
1491 if (&obj->base == NULL) {
1496 /* Try to flush the object off the GPU without holding the lock.
1497 * We will repeat the flush holding the lock in the normal manner
1498 * to catch cases where we are gazumped.
1500 ret = i915_gem_object_wait_rendering__nonblocking(obj,
1506 if (read_domains & I915_GEM_DOMAIN_GTT)
1507 ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0);
1509 ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0);
1512 drm_gem_object_unreference(&obj->base);
1514 mutex_unlock(&dev->struct_mutex);
1519 * Called when user space has done writes to this buffer
1522 i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
1523 struct drm_file *file)
1525 struct drm_i915_gem_sw_finish *args = data;
1526 struct drm_i915_gem_object *obj;
1529 ret = i915_mutex_lock_interruptible(dev);
1533 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
1534 if (&obj->base == NULL) {
1539 /* Pinned buffers may be scanout, so flush the cache */
1540 if (obj->pin_display)
1541 i915_gem_object_flush_cpu_write_domain(obj);
1543 drm_gem_object_unreference(&obj->base);
1545 mutex_unlock(&dev->struct_mutex);
1550 * Maps the contents of an object, returning the address it is mapped
1553 * While the mapping holds a reference on the contents of the object, it doesn't
1554 * imply a ref on the object itself.
1558 * DRM driver writers who look a this function as an example for how to do GEM
1559 * mmap support, please don't implement mmap support like here. The modern way
1560 * to implement DRM mmap support is with an mmap offset ioctl (like
1561 * i915_gem_mmap_gtt) and then using the mmap syscall on the DRM fd directly.
1562 * That way debug tooling like valgrind will understand what's going on, hiding
1563 * the mmap call in a driver private ioctl will break that. The i915 driver only
1564 * does cpu mmaps this way because we didn't know better.
1567 i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
1568 struct drm_file *file)
1570 struct drm_i915_gem_mmap *args = data;
1571 struct drm_gem_object *obj;
1574 if (args->flags & ~(I915_MMAP_WC))
1577 if (args->flags & I915_MMAP_WC && !cpu_has_pat)
1580 obj = drm_gem_object_lookup(dev, file, args->handle);
1584 /* prime objects have no backing filp to GEM mmap
1588 drm_gem_object_unreference_unlocked(obj);
1592 addr = vm_mmap(obj->filp, 0, args->size,
1593 PROT_READ | PROT_WRITE, MAP_SHARED,
1595 if (args->flags & I915_MMAP_WC) {
1596 struct mm_struct *mm = current->mm;
1597 struct vm_area_struct *vma;
1599 down_write(&mm->mmap_sem);
1600 vma = find_vma(mm, addr);
1603 pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
1606 up_write(&mm->mmap_sem);
1608 drm_gem_object_unreference_unlocked(obj);
1609 if (IS_ERR((void *)addr))
1612 args->addr_ptr = (uint64_t) addr;
1618 * i915_gem_fault - fault a page into the GTT
1619 * vma: VMA in question
1622 * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped
1623 * from userspace. The fault handler takes care of binding the object to
1624 * the GTT (if needed), allocating and programming a fence register (again,
1625 * only if needed based on whether the old reg is still valid or the object
1626 * is tiled) and inserting a new PTE into the faulting process.
1628 * Note that the faulting process may involve evicting existing objects
1629 * from the GTT and/or fence registers to make room. So performance may
1630 * suffer if the GTT working set is large or there are few fence registers
1633 int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1635 struct drm_i915_gem_object *obj = to_intel_bo(vma->vm_private_data);
1636 struct drm_device *dev = obj->base.dev;
1637 struct drm_i915_private *dev_priv = dev->dev_private;
1638 pgoff_t page_offset;
1641 bool write = !!(vmf->flags & FAULT_FLAG_WRITE);
1643 intel_runtime_pm_get(dev_priv);
1645 /* We don't use vmf->pgoff since that has the fake offset */
1646 page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >>
1649 ret = i915_mutex_lock_interruptible(dev);
1653 trace_i915_gem_object_fault(obj, page_offset, true, write);
1655 /* Try to flush the object off the GPU first without holding the lock.
1656 * Upon reacquiring the lock, we will perform our sanity checks and then
1657 * repeat the flush holding the lock in the normal manner to catch cases
1658 * where we are gazumped.
1660 ret = i915_gem_object_wait_rendering__nonblocking(obj, NULL, !write);
1664 /* Access to snoopable pages through the GTT is incoherent. */
1665 if (obj->cache_level != I915_CACHE_NONE && !HAS_LLC(dev)) {
1670 /* Now bind it into the GTT if needed */
1671 ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE);
1675 ret = i915_gem_object_set_to_gtt_domain(obj, write);
1679 ret = i915_gem_object_get_fence(obj);
1683 /* Finally, remap it using the new GTT offset */
1684 pfn = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj);
1687 if (!obj->fault_mappable) {
1688 unsigned long size = min_t(unsigned long,
1689 vma->vm_end - vma->vm_start,
1693 for (i = 0; i < size >> PAGE_SHIFT; i++) {
1694 ret = vm_insert_pfn(vma,
1695 (unsigned long)vma->vm_start + i * PAGE_SIZE,
1701 obj->fault_mappable = true;
1703 ret = vm_insert_pfn(vma,
1704 (unsigned long)vmf->virtual_address,
1707 i915_gem_object_ggtt_unpin(obj);
1709 mutex_unlock(&dev->struct_mutex);
1714 * We eat errors when the gpu is terminally wedged to avoid
1715 * userspace unduly crashing (gl has no provisions for mmaps to
1716 * fail). But any other -EIO isn't ours (e.g. swap in failure)
1717 * and so needs to be reported.
1719 if (!i915_terminally_wedged(&dev_priv->gpu_error)) {
1720 ret = VM_FAULT_SIGBUS;
1725 * EAGAIN means the gpu is hung and we'll wait for the error
1726 * handler to reset everything when re-faulting in
1727 * i915_mutex_lock_interruptible.
1734 * EBUSY is ok: this just means that another thread
1735 * already did the job.
1737 ret = VM_FAULT_NOPAGE;
1744 ret = VM_FAULT_SIGBUS;
1747 WARN_ONCE(ret, "unhandled error in i915_gem_fault: %i\n", ret);
1748 ret = VM_FAULT_SIGBUS;
1752 intel_runtime_pm_put(dev_priv);
1757 * i915_gem_release_mmap - remove physical page mappings
1758 * @obj: obj in question
1760 * Preserve the reservation of the mmapping with the DRM core code, but
1761 * relinquish ownership of the pages back to the system.
1763 * It is vital that we remove the page mapping if we have mapped a tiled
1764 * object through the GTT and then lose the fence register due to
1765 * resource pressure. Similarly if the object has been moved out of the
1766 * aperture, than pages mapped into userspace must be revoked. Removing the
1767 * mapping will then trigger a page fault on the next user access, allowing
1768 * fixup by i915_gem_fault().
1771 i915_gem_release_mmap(struct drm_i915_gem_object *obj)
1773 if (!obj->fault_mappable)
1776 drm_vma_node_unmap(&obj->base.vma_node,
1777 obj->base.dev->anon_inode->i_mapping);
1778 obj->fault_mappable = false;
1782 i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv)
1784 struct drm_i915_gem_object *obj;
1786 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
1787 i915_gem_release_mmap(obj);
1791 i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode)
1795 if (INTEL_INFO(dev)->gen >= 4 ||
1796 tiling_mode == I915_TILING_NONE)
1799 /* Previous chips need a power-of-two fence region when tiling */
1800 if (INTEL_INFO(dev)->gen == 3)
1801 gtt_size = 1024*1024;
1803 gtt_size = 512*1024;
1805 while (gtt_size < size)
1812 * i915_gem_get_gtt_alignment - return required GTT alignment for an object
1813 * @obj: object to check
1815 * Return the required GTT alignment for an object, taking into account
1816 * potential fence register mapping.
1819 i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size,
1820 int tiling_mode, bool fenced)
1823 * Minimum alignment is 4k (GTT page size), but might be greater
1824 * if a fence register is needed for the object.
1826 if (INTEL_INFO(dev)->gen >= 4 || (!fenced && IS_G33(dev)) ||
1827 tiling_mode == I915_TILING_NONE)
1831 * Previous chips need to be aligned to the size of the smallest
1832 * fence register that can contain the object.
1834 return i915_gem_get_gtt_size(dev, size, tiling_mode);
1837 static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj)
1839 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
1842 if (drm_vma_node_has_offset(&obj->base.vma_node))
1845 dev_priv->mm.shrinker_no_lock_stealing = true;
1847 ret = drm_gem_create_mmap_offset(&obj->base);
1851 /* Badly fragmented mmap space? The only way we can recover
1852 * space is by destroying unwanted objects. We can't randomly release
1853 * mmap_offsets as userspace expects them to be persistent for the
1854 * lifetime of the objects. The closest we can is to release the
1855 * offsets on purgeable objects by truncating it and marking it purged,
1856 * which prevents userspace from ever using that object again.
1858 i915_gem_shrink(dev_priv,
1859 obj->base.size >> PAGE_SHIFT,
1861 I915_SHRINK_UNBOUND |
1862 I915_SHRINK_PURGEABLE);
1863 ret = drm_gem_create_mmap_offset(&obj->base);
1867 i915_gem_shrink_all(dev_priv);
1868 ret = drm_gem_create_mmap_offset(&obj->base);
1870 dev_priv->mm.shrinker_no_lock_stealing = false;
1875 static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object *obj)
1877 drm_gem_free_mmap_offset(&obj->base);
1881 i915_gem_mmap_gtt(struct drm_file *file,
1882 struct drm_device *dev,
1886 struct drm_i915_private *dev_priv = dev->dev_private;
1887 struct drm_i915_gem_object *obj;
1890 ret = i915_mutex_lock_interruptible(dev);
1894 obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
1895 if (&obj->base == NULL) {
1900 if (obj->base.size > dev_priv->gtt.mappable_end) {
1905 if (obj->madv != I915_MADV_WILLNEED) {
1906 DRM_DEBUG("Attempting to mmap a purgeable buffer\n");
1911 ret = i915_gem_object_create_mmap_offset(obj);
1915 *offset = drm_vma_node_offset_addr(&obj->base.vma_node);
1918 drm_gem_object_unreference(&obj->base);
1920 mutex_unlock(&dev->struct_mutex);
1925 * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing
1927 * @data: GTT mapping ioctl data
1928 * @file: GEM object info
1930 * Simply returns the fake offset to userspace so it can mmap it.
1931 * The mmap call will end up in drm_gem_mmap(), which will set things
1932 * up so we can get faults in the handler above.
1934 * The fault handler will take care of binding the object into the GTT
1935 * (since it may have been evicted to make room for something), allocating
1936 * a fence register, and mapping the appropriate aperture address into
1940 i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
1941 struct drm_file *file)
1943 struct drm_i915_gem_mmap_gtt *args = data;
1945 return i915_gem_mmap_gtt(file, dev, args->handle, &args->offset);
1948 /* Immediately discard the backing storage */
1950 i915_gem_object_truncate(struct drm_i915_gem_object *obj)
1952 i915_gem_object_free_mmap_offset(obj);
1954 if (obj->base.filp == NULL)
1957 /* Our goal here is to return as much of the memory as
1958 * is possible back to the system as we are called from OOM.
1959 * To do this we must instruct the shmfs to drop all of its
1960 * backing pages, *now*.
1962 shmem_truncate_range(file_inode(obj->base.filp), 0, (loff_t)-1);
1963 obj->madv = __I915_MADV_PURGED;
1966 /* Try to discard unwanted pages */
1968 i915_gem_object_invalidate(struct drm_i915_gem_object *obj)
1970 struct address_space *mapping;
1972 switch (obj->madv) {
1973 case I915_MADV_DONTNEED:
1974 i915_gem_object_truncate(obj);
1975 case __I915_MADV_PURGED:
1979 if (obj->base.filp == NULL)
1982 mapping = file_inode(obj->base.filp)->i_mapping,
1983 invalidate_mapping_pages(mapping, 0, (loff_t)-1);
1987 i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj)
1989 struct sg_page_iter sg_iter;
1992 BUG_ON(obj->madv == __I915_MADV_PURGED);
1994 ret = i915_gem_object_set_to_cpu_domain(obj, true);
1996 /* In the event of a disaster, abandon all caches and
1997 * hope for the best.
1999 WARN_ON(ret != -EIO);
2000 i915_gem_clflush_object(obj, true);
2001 obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU;
2004 if (i915_gem_object_needs_bit17_swizzle(obj))
2005 i915_gem_object_save_bit_17_swizzle(obj);
2007 if (obj->madv == I915_MADV_DONTNEED)
2010 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0) {
2011 struct page *page = sg_page_iter_page(&sg_iter);
2014 set_page_dirty(page);
2016 if (obj->madv == I915_MADV_WILLNEED)
2017 mark_page_accessed(page);
2019 page_cache_release(page);
2023 sg_free_table(obj->pages);
2028 i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
2030 const struct drm_i915_gem_object_ops *ops = obj->ops;
2032 if (obj->pages == NULL)
2035 if (obj->pages_pin_count)
2038 BUG_ON(i915_gem_obj_bound_any(obj));
2040 /* ->put_pages might need to allocate memory for the bit17 swizzle
2041 * array, hence protect them from being reaped by removing them from gtt
2043 list_del(&obj->global_list);
2045 ops->put_pages(obj);
2048 i915_gem_object_invalidate(obj);
2054 i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
2056 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2058 struct address_space *mapping;
2059 struct sg_table *st;
2060 struct scatterlist *sg;
2061 struct sg_page_iter sg_iter;
2063 unsigned long last_pfn = 0; /* suppress gcc warning */
2066 /* Assert that the object is not currently in any GPU domain. As it
2067 * wasn't in the GTT, there shouldn't be any way it could have been in
2070 BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS);
2071 BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS);
2073 st = kmalloc(sizeof(*st), GFP_KERNEL);
2077 page_count = obj->base.size / PAGE_SIZE;
2078 if (sg_alloc_table(st, page_count, GFP_KERNEL)) {
2083 /* Get the list of pages out of our struct file. They'll be pinned
2084 * at this point until we release them.
2086 * Fail silently without starting the shrinker
2088 mapping = file_inode(obj->base.filp)->i_mapping;
2089 gfp = mapping_gfp_mask(mapping);
2090 gfp |= __GFP_NORETRY | __GFP_NOWARN | __GFP_NO_KSWAPD;
2091 gfp &= ~(__GFP_IO | __GFP_WAIT);
2094 for (i = 0; i < page_count; i++) {
2095 page = shmem_read_mapping_page_gfp(mapping, i, gfp);
2097 i915_gem_shrink(dev_priv,
2100 I915_SHRINK_UNBOUND |
2101 I915_SHRINK_PURGEABLE);
2102 page = shmem_read_mapping_page_gfp(mapping, i, gfp);
2105 /* We've tried hard to allocate the memory by reaping
2106 * our own buffer, now let the real VM do its job and
2107 * go down in flames if truly OOM.
2109 i915_gem_shrink_all(dev_priv);
2110 page = shmem_read_mapping_page(mapping, i);
2114 #ifdef CONFIG_SWIOTLB
2115 if (swiotlb_nr_tbl()) {
2117 sg_set_page(sg, page, PAGE_SIZE, 0);
2122 if (!i || page_to_pfn(page) != last_pfn + 1) {
2126 sg_set_page(sg, page, PAGE_SIZE, 0);
2128 sg->length += PAGE_SIZE;
2130 last_pfn = page_to_pfn(page);
2132 /* Check that the i965g/gm workaround works. */
2133 WARN_ON((gfp & __GFP_DMA32) && (last_pfn >= 0x00100000UL));
2135 #ifdef CONFIG_SWIOTLB
2136 if (!swiotlb_nr_tbl())
2141 if (i915_gem_object_needs_bit17_swizzle(obj))
2142 i915_gem_object_do_bit_17_swizzle(obj);
2144 if (obj->tiling_mode != I915_TILING_NONE &&
2145 dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES)
2146 i915_gem_object_pin_pages(obj);
2152 for_each_sg_page(st->sgl, &sg_iter, st->nents, 0)
2153 page_cache_release(sg_page_iter_page(&sg_iter));
2157 /* shmemfs first checks if there is enough memory to allocate the page
2158 * and reports ENOSPC should there be insufficient, along with the usual
2159 * ENOMEM for a genuine allocation failure.
2161 * We use ENOSPC in our driver to mean that we have run out of aperture
2162 * space and so want to translate the error from shmemfs back to our
2163 * usual understanding of ENOMEM.
2165 if (PTR_ERR(page) == -ENOSPC)
2168 return PTR_ERR(page);
2171 /* Ensure that the associated pages are gathered from the backing storage
2172 * and pinned into our object. i915_gem_object_get_pages() may be called
2173 * multiple times before they are released by a single call to
2174 * i915_gem_object_put_pages() - once the pages are no longer referenced
2175 * either as a result of memory pressure (reaping pages under the shrinker)
2176 * or as the object is itself released.
2179 i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
2181 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2182 const struct drm_i915_gem_object_ops *ops = obj->ops;
2188 if (obj->madv != I915_MADV_WILLNEED) {
2189 DRM_DEBUG("Attempting to obtain a purgeable object\n");
2193 BUG_ON(obj->pages_pin_count);
2195 ret = ops->get_pages(obj);
2199 list_add_tail(&obj->global_list, &dev_priv->mm.unbound_list);
2201 obj->get_page.sg = obj->pages->sgl;
2202 obj->get_page.last = 0;
2208 i915_gem_object_move_to_active(struct drm_i915_gem_object *obj,
2209 struct intel_engine_cs *ring)
2211 struct drm_i915_gem_request *req;
2212 struct intel_engine_cs *old_ring;
2214 BUG_ON(ring == NULL);
2216 req = intel_ring_get_request(ring);
2217 old_ring = i915_gem_request_get_ring(obj->last_read_req);
2219 if (old_ring != ring && obj->last_write_req) {
2220 /* Keep the request relative to the current ring */
2221 i915_gem_request_assign(&obj->last_write_req, req);
2224 /* Add a reference if we're newly entering the active list. */
2226 drm_gem_object_reference(&obj->base);
2230 list_move_tail(&obj->ring_list, &ring->active_list);
2232 i915_gem_request_assign(&obj->last_read_req, req);
2235 void i915_vma_move_to_active(struct i915_vma *vma,
2236 struct intel_engine_cs *ring)
2238 list_move_tail(&vma->mm_list, &vma->vm->active_list);
2239 return i915_gem_object_move_to_active(vma->obj, ring);
2243 i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj)
2245 struct i915_vma *vma;
2247 BUG_ON(obj->base.write_domain & ~I915_GEM_GPU_DOMAINS);
2248 BUG_ON(!obj->active);
2250 list_for_each_entry(vma, &obj->vma_list, vma_link) {
2251 if (!list_empty(&vma->mm_list))
2252 list_move_tail(&vma->mm_list, &vma->vm->inactive_list);
2255 intel_fb_obj_flush(obj, true);
2257 list_del_init(&obj->ring_list);
2259 i915_gem_request_assign(&obj->last_read_req, NULL);
2260 i915_gem_request_assign(&obj->last_write_req, NULL);
2261 obj->base.write_domain = 0;
2263 i915_gem_request_assign(&obj->last_fenced_req, NULL);
2266 drm_gem_object_unreference(&obj->base);
2268 WARN_ON(i915_verify_lists(dev));
2272 i915_gem_object_retire(struct drm_i915_gem_object *obj)
2274 if (obj->last_read_req == NULL)
2277 if (i915_gem_request_completed(obj->last_read_req, true))
2278 i915_gem_object_move_to_inactive(obj);
2282 i915_gem_init_seqno(struct drm_device *dev, u32 seqno)
2284 struct drm_i915_private *dev_priv = dev->dev_private;
2285 struct intel_engine_cs *ring;
2288 /* Carefully retire all requests without writing to the rings */
2289 for_each_ring(ring, dev_priv, i) {
2290 ret = intel_ring_idle(ring);
2294 i915_gem_retire_requests(dev);
2296 /* Finally reset hw state */
2297 for_each_ring(ring, dev_priv, i) {
2298 intel_ring_init_seqno(ring, seqno);
2300 for (j = 0; j < ARRAY_SIZE(ring->semaphore.sync_seqno); j++)
2301 ring->semaphore.sync_seqno[j] = 0;
2307 int i915_gem_set_seqno(struct drm_device *dev, u32 seqno)
2309 struct drm_i915_private *dev_priv = dev->dev_private;
2315 /* HWS page needs to be set less than what we
2316 * will inject to ring
2318 ret = i915_gem_init_seqno(dev, seqno - 1);
2322 /* Carefully set the last_seqno value so that wrap
2323 * detection still works
2325 dev_priv->next_seqno = seqno;
2326 dev_priv->last_seqno = seqno - 1;
2327 if (dev_priv->last_seqno == 0)
2328 dev_priv->last_seqno--;
2334 i915_gem_get_seqno(struct drm_device *dev, u32 *seqno)
2336 struct drm_i915_private *dev_priv = dev->dev_private;
2338 /* reserve 0 for non-seqno */
2339 if (dev_priv->next_seqno == 0) {
2340 int ret = i915_gem_init_seqno(dev, 0);
2344 dev_priv->next_seqno = 1;
2347 *seqno = dev_priv->last_seqno = dev_priv->next_seqno++;
2351 int __i915_add_request(struct intel_engine_cs *ring,
2352 struct drm_file *file,
2353 struct drm_i915_gem_object *obj)
2355 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2356 struct drm_i915_gem_request *request;
2357 struct intel_ringbuffer *ringbuf;
2361 request = ring->outstanding_lazy_request;
2362 if (WARN_ON(request == NULL))
2365 if (i915.enable_execlists) {
2366 ringbuf = request->ctx->engine[ring->id].ringbuf;
2368 ringbuf = ring->buffer;
2370 request_start = intel_ring_get_tail(ringbuf);
2372 * Emit any outstanding flushes - execbuf can fail to emit the flush
2373 * after having emitted the batchbuffer command. Hence we need to fix
2374 * things up similar to emitting the lazy request. The difference here
2375 * is that the flush _must_ happen before the next request, no matter
2378 if (i915.enable_execlists) {
2379 ret = logical_ring_flush_all_caches(ringbuf, request->ctx);
2383 ret = intel_ring_flush_all_caches(ring);
2388 /* Record the position of the start of the request so that
2389 * should we detect the updated seqno part-way through the
2390 * GPU processing the request, we never over-estimate the
2391 * position of the head.
2393 request->postfix = intel_ring_get_tail(ringbuf);
2395 if (i915.enable_execlists) {
2396 ret = ring->emit_request(ringbuf, request);
2400 ret = ring->add_request(ring);
2405 request->head = request_start;
2406 request->tail = intel_ring_get_tail(ringbuf);
2408 /* Whilst this request exists, batch_obj will be on the
2409 * active_list, and so will hold the active reference. Only when this
2410 * request is retired will the the batch_obj be moved onto the
2411 * inactive_list and lose its active reference. Hence we do not need
2412 * to explicitly hold another reference here.
2414 request->batch_obj = obj;
2416 if (!i915.enable_execlists) {
2417 /* Hold a reference to the current context so that we can inspect
2418 * it later in case a hangcheck error event fires.
2420 request->ctx = ring->last_context;
2422 i915_gem_context_reference(request->ctx);
2425 request->emitted_jiffies = jiffies;
2426 list_add_tail(&request->list, &ring->request_list);
2427 request->file_priv = NULL;
2430 struct drm_i915_file_private *file_priv = file->driver_priv;
2432 spin_lock(&file_priv->mm.lock);
2433 request->file_priv = file_priv;
2434 list_add_tail(&request->client_list,
2435 &file_priv->mm.request_list);
2436 spin_unlock(&file_priv->mm.lock);
2438 request->pid = get_pid(task_pid(current));
2441 trace_i915_gem_request_add(request);
2442 ring->outstanding_lazy_request = NULL;
2444 i915_queue_hangcheck(ring->dev);
2446 queue_delayed_work(dev_priv->wq,
2447 &dev_priv->mm.retire_work,
2448 round_jiffies_up_relative(HZ));
2449 intel_mark_busy(dev_priv->dev);
2455 i915_gem_request_remove_from_client(struct drm_i915_gem_request *request)
2457 struct drm_i915_file_private *file_priv = request->file_priv;
2462 spin_lock(&file_priv->mm.lock);
2463 list_del(&request->client_list);
2464 request->file_priv = NULL;
2465 spin_unlock(&file_priv->mm.lock);
2468 static bool i915_context_is_banned(struct drm_i915_private *dev_priv,
2469 const struct intel_context *ctx)
2471 unsigned long elapsed;
2473 elapsed = get_seconds() - ctx->hang_stats.guilty_ts;
2475 if (ctx->hang_stats.banned)
2478 if (ctx->hang_stats.ban_period_seconds &&
2479 elapsed <= ctx->hang_stats.ban_period_seconds) {
2480 if (!i915_gem_context_is_default(ctx)) {
2481 DRM_DEBUG("context hanging too fast, banning!\n");
2483 } else if (i915_stop_ring_allow_ban(dev_priv)) {
2484 if (i915_stop_ring_allow_warn(dev_priv))
2485 DRM_ERROR("gpu hanging too fast, banning!\n");
2493 static void i915_set_reset_status(struct drm_i915_private *dev_priv,
2494 struct intel_context *ctx,
2497 struct i915_ctx_hang_stats *hs;
2502 hs = &ctx->hang_stats;
2505 hs->banned = i915_context_is_banned(dev_priv, ctx);
2507 hs->guilty_ts = get_seconds();
2509 hs->batch_pending++;
2513 static void i915_gem_free_request(struct drm_i915_gem_request *request)
2515 list_del(&request->list);
2516 i915_gem_request_remove_from_client(request);
2518 put_pid(request->pid);
2520 i915_gem_request_unreference(request);
2523 void i915_gem_request_free(struct kref *req_ref)
2525 struct drm_i915_gem_request *req = container_of(req_ref,
2527 struct intel_context *ctx = req->ctx;
2530 if (i915.enable_execlists) {
2531 struct intel_engine_cs *ring = req->ring;
2533 if (ctx != ring->default_context)
2534 intel_lr_context_unpin(ring, ctx);
2537 i915_gem_context_unreference(ctx);
2540 kmem_cache_free(req->i915->requests, req);
2543 int i915_gem_request_alloc(struct intel_engine_cs *ring,
2544 struct intel_context *ctx)
2546 struct drm_i915_private *dev_priv = to_i915(ring->dev);
2547 struct drm_i915_gem_request *rq;
2550 if (ring->outstanding_lazy_request)
2553 rq = kmem_cache_zalloc(dev_priv->requests, GFP_KERNEL);
2557 kref_init(&rq->ref);
2558 rq->i915 = dev_priv;
2560 ret = i915_gem_get_seqno(ring->dev, &rq->seqno);
2568 if (i915.enable_execlists)
2569 ret = intel_logical_ring_alloc_request_extras(rq, ctx);
2571 ret = intel_ring_alloc_request_extras(rq);
2577 ring->outstanding_lazy_request = rq;
2581 struct drm_i915_gem_request *
2582 i915_gem_find_active_request(struct intel_engine_cs *ring)
2584 struct drm_i915_gem_request *request;
2586 list_for_each_entry(request, &ring->request_list, list) {
2587 if (i915_gem_request_completed(request, false))
2596 static void i915_gem_reset_ring_status(struct drm_i915_private *dev_priv,
2597 struct intel_engine_cs *ring)
2599 struct drm_i915_gem_request *request;
2602 request = i915_gem_find_active_request(ring);
2604 if (request == NULL)
2607 ring_hung = ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG;
2609 i915_set_reset_status(dev_priv, request->ctx, ring_hung);
2611 list_for_each_entry_continue(request, &ring->request_list, list)
2612 i915_set_reset_status(dev_priv, request->ctx, false);
2615 static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv,
2616 struct intel_engine_cs *ring)
2618 while (!list_empty(&ring->active_list)) {
2619 struct drm_i915_gem_object *obj;
2621 obj = list_first_entry(&ring->active_list,
2622 struct drm_i915_gem_object,
2625 i915_gem_object_move_to_inactive(obj);
2629 * Clear the execlists queue up before freeing the requests, as those
2630 * are the ones that keep the context and ringbuffer backing objects
2633 while (!list_empty(&ring->execlist_queue)) {
2634 struct drm_i915_gem_request *submit_req;
2636 submit_req = list_first_entry(&ring->execlist_queue,
2637 struct drm_i915_gem_request,
2639 list_del(&submit_req->execlist_link);
2641 if (submit_req->ctx != ring->default_context)
2642 intel_lr_context_unpin(ring, submit_req->ctx);
2644 i915_gem_request_unreference(submit_req);
2648 * We must free the requests after all the corresponding objects have
2649 * been moved off active lists. Which is the same order as the normal
2650 * retire_requests function does. This is important if object hold
2651 * implicit references on things like e.g. ppgtt address spaces through
2654 while (!list_empty(&ring->request_list)) {
2655 struct drm_i915_gem_request *request;
2657 request = list_first_entry(&ring->request_list,
2658 struct drm_i915_gem_request,
2661 i915_gem_free_request(request);
2664 /* This may not have been flushed before the reset, so clean it now */
2665 i915_gem_request_assign(&ring->outstanding_lazy_request, NULL);
2668 void i915_gem_restore_fences(struct drm_device *dev)
2670 struct drm_i915_private *dev_priv = dev->dev_private;
2673 for (i = 0; i < dev_priv->num_fence_regs; i++) {
2674 struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i];
2677 * Commit delayed tiling changes if we have an object still
2678 * attached to the fence, otherwise just clear the fence.
2681 i915_gem_object_update_fence(reg->obj, reg,
2682 reg->obj->tiling_mode);
2684 i915_gem_write_fence(dev, i, NULL);
2689 void i915_gem_reset(struct drm_device *dev)
2691 struct drm_i915_private *dev_priv = dev->dev_private;
2692 struct intel_engine_cs *ring;
2696 * Before we free the objects from the requests, we need to inspect
2697 * them for finding the guilty party. As the requests only borrow
2698 * their reference to the objects, the inspection must be done first.
2700 for_each_ring(ring, dev_priv, i)
2701 i915_gem_reset_ring_status(dev_priv, ring);
2703 for_each_ring(ring, dev_priv, i)
2704 i915_gem_reset_ring_cleanup(dev_priv, ring);
2706 i915_gem_context_reset(dev);
2708 i915_gem_restore_fences(dev);
2712 * This function clears the request list as sequence numbers are passed.
2715 i915_gem_retire_requests_ring(struct intel_engine_cs *ring)
2717 if (list_empty(&ring->request_list))
2720 WARN_ON(i915_verify_lists(ring->dev));
2722 /* Retire requests first as we use it above for the early return.
2723 * If we retire requests last, we may use a later seqno and so clear
2724 * the requests lists without clearing the active list, leading to
2727 while (!list_empty(&ring->request_list)) {
2728 struct drm_i915_gem_request *request;
2730 request = list_first_entry(&ring->request_list,
2731 struct drm_i915_gem_request,
2734 if (!i915_gem_request_completed(request, true))
2737 trace_i915_gem_request_retire(request);
2739 /* We know the GPU must have read the request to have
2740 * sent us the seqno + interrupt, so use the position
2741 * of tail of the request to update the last known position
2744 request->ringbuf->last_retired_head = request->postfix;
2746 i915_gem_free_request(request);
2749 /* Move any buffers on the active list that are no longer referenced
2750 * by the ringbuffer to the flushing/inactive lists as appropriate,
2751 * before we free the context associated with the requests.
2753 while (!list_empty(&ring->active_list)) {
2754 struct drm_i915_gem_object *obj;
2756 obj = list_first_entry(&ring->active_list,
2757 struct drm_i915_gem_object,
2760 if (!i915_gem_request_completed(obj->last_read_req, true))
2763 i915_gem_object_move_to_inactive(obj);
2766 if (unlikely(ring->trace_irq_req &&
2767 i915_gem_request_completed(ring->trace_irq_req, true))) {
2768 ring->irq_put(ring);
2769 i915_gem_request_assign(&ring->trace_irq_req, NULL);
2772 WARN_ON(i915_verify_lists(ring->dev));
2776 i915_gem_retire_requests(struct drm_device *dev)
2778 struct drm_i915_private *dev_priv = dev->dev_private;
2779 struct intel_engine_cs *ring;
2783 for_each_ring(ring, dev_priv, i) {
2784 i915_gem_retire_requests_ring(ring);
2785 idle &= list_empty(&ring->request_list);
2786 if (i915.enable_execlists) {
2787 unsigned long flags;
2789 spin_lock_irqsave(&ring->execlist_lock, flags);
2790 idle &= list_empty(&ring->execlist_queue);
2791 spin_unlock_irqrestore(&ring->execlist_lock, flags);
2793 intel_execlists_retire_requests(ring);
2798 mod_delayed_work(dev_priv->wq,
2799 &dev_priv->mm.idle_work,
2800 msecs_to_jiffies(100));
2806 i915_gem_retire_work_handler(struct work_struct *work)
2808 struct drm_i915_private *dev_priv =
2809 container_of(work, typeof(*dev_priv), mm.retire_work.work);
2810 struct drm_device *dev = dev_priv->dev;
2813 /* Come back later if the device is busy... */
2815 if (mutex_trylock(&dev->struct_mutex)) {
2816 idle = i915_gem_retire_requests(dev);
2817 mutex_unlock(&dev->struct_mutex);
2820 queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work,
2821 round_jiffies_up_relative(HZ));
2825 i915_gem_idle_work_handler(struct work_struct *work)
2827 struct drm_i915_private *dev_priv =
2828 container_of(work, typeof(*dev_priv), mm.idle_work.work);
2829 struct drm_device *dev = dev_priv->dev;
2830 struct intel_engine_cs *ring;
2833 for_each_ring(ring, dev_priv, i)
2834 if (!list_empty(&ring->request_list))
2837 intel_mark_idle(dev);
2839 if (mutex_trylock(&dev->struct_mutex)) {
2840 struct intel_engine_cs *ring;
2843 for_each_ring(ring, dev_priv, i)
2844 i915_gem_batch_pool_fini(&ring->batch_pool);
2846 mutex_unlock(&dev->struct_mutex);
2851 * Ensures that an object will eventually get non-busy by flushing any required
2852 * write domains, emitting any outstanding lazy request and retiring and
2853 * completed requests.
2856 i915_gem_object_flush_active(struct drm_i915_gem_object *obj)
2858 struct intel_engine_cs *ring;
2862 ring = i915_gem_request_get_ring(obj->last_read_req);
2864 ret = i915_gem_check_olr(obj->last_read_req);
2868 i915_gem_retire_requests_ring(ring);
2875 * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT
2876 * @DRM_IOCTL_ARGS: standard ioctl arguments
2878 * Returns 0 if successful, else an error is returned with the remaining time in
2879 * the timeout parameter.
2880 * -ETIME: object is still busy after timeout
2881 * -ERESTARTSYS: signal interrupted the wait
2882 * -ENONENT: object doesn't exist
2883 * Also possible, but rare:
2884 * -EAGAIN: GPU wedged
2886 * -ENODEV: Internal IRQ fail
2887 * -E?: The add request failed
2889 * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any
2890 * non-zero timeout parameter the wait ioctl will wait for the given number of
2891 * nanoseconds on an object becoming unbusy. Since the wait itself does so
2892 * without holding struct_mutex the object may become re-busied before this
2893 * function completes. A similar but shorter * race condition exists in the busy
2897 i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
2899 struct drm_i915_private *dev_priv = dev->dev_private;
2900 struct drm_i915_gem_wait *args = data;
2901 struct drm_i915_gem_object *obj;
2902 struct drm_i915_gem_request *req;
2903 unsigned reset_counter;
2906 if (args->flags != 0)
2909 ret = i915_mutex_lock_interruptible(dev);
2913 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->bo_handle));
2914 if (&obj->base == NULL) {
2915 mutex_unlock(&dev->struct_mutex);
2919 /* Need to make sure the object gets inactive eventually. */
2920 ret = i915_gem_object_flush_active(obj);
2924 if (!obj->active || !obj->last_read_req)
2927 req = obj->last_read_req;
2929 /* Do this after OLR check to make sure we make forward progress polling
2930 * on this IOCTL with a timeout == 0 (like busy ioctl)
2932 if (args->timeout_ns == 0) {
2937 drm_gem_object_unreference(&obj->base);
2938 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
2939 i915_gem_request_reference(req);
2940 mutex_unlock(&dev->struct_mutex);
2942 ret = __i915_wait_request(req, reset_counter, true,
2943 args->timeout_ns > 0 ? &args->timeout_ns : NULL,
2945 i915_gem_request_unreference__unlocked(req);
2949 drm_gem_object_unreference(&obj->base);
2950 mutex_unlock(&dev->struct_mutex);
2955 * i915_gem_object_sync - sync an object to a ring.
2957 * @obj: object which may be in use on another ring.
2958 * @to: ring we wish to use the object on. May be NULL.
2960 * This code is meant to abstract object synchronization with the GPU.
2961 * Calling with NULL implies synchronizing the object with the CPU
2962 * rather than a particular GPU ring.
2964 * Returns 0 if successful, else propagates up the lower layer error.
2967 i915_gem_object_sync(struct drm_i915_gem_object *obj,
2968 struct intel_engine_cs *to)
2970 struct intel_engine_cs *from;
2974 from = i915_gem_request_get_ring(obj->last_read_req);
2976 if (from == NULL || to == from)
2979 if (to == NULL || !i915_semaphore_is_enabled(obj->base.dev))
2980 return i915_gem_object_wait_rendering(obj, false);
2982 idx = intel_ring_sync_index(from, to);
2984 seqno = i915_gem_request_get_seqno(obj->last_read_req);
2985 /* Optimization: Avoid semaphore sync when we are sure we already
2986 * waited for an object with higher seqno */
2987 if (seqno <= from->semaphore.sync_seqno[idx])
2990 ret = i915_gem_check_olr(obj->last_read_req);
2994 trace_i915_gem_ring_sync_to(from, to, obj->last_read_req);
2995 ret = to->semaphore.sync_to(to, from, seqno);
2997 /* We use last_read_req because sync_to()
2998 * might have just caused seqno wrap under
3001 from->semaphore.sync_seqno[idx] =
3002 i915_gem_request_get_seqno(obj->last_read_req);
3007 static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj)
3009 u32 old_write_domain, old_read_domains;
3011 /* Force a pagefault for domain tracking on next user access */
3012 i915_gem_release_mmap(obj);
3014 if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
3017 /* Wait for any direct GTT access to complete */
3020 old_read_domains = obj->base.read_domains;
3021 old_write_domain = obj->base.write_domain;
3023 obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT;
3024 obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT;
3026 trace_i915_gem_object_change_domain(obj,
3031 int i915_vma_unbind(struct i915_vma *vma)
3033 struct drm_i915_gem_object *obj = vma->obj;
3034 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3037 if (list_empty(&vma->vma_link))
3040 if (!drm_mm_node_allocated(&vma->node)) {
3041 i915_gem_vma_destroy(vma);
3048 BUG_ON(obj->pages == NULL);
3050 ret = i915_gem_object_finish_gpu(obj);
3053 /* Continue on if we fail due to EIO, the GPU is hung so we
3054 * should be safe and we need to cleanup or else we might
3055 * cause memory corruption through use-after-free.
3058 if (i915_is_ggtt(vma->vm) &&
3059 vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) {
3060 i915_gem_object_finish_gtt(obj);
3062 /* release the fence reg _after_ flushing */
3063 ret = i915_gem_object_put_fence(obj);
3068 trace_i915_vma_unbind(vma);
3070 vma->unbind_vma(vma);
3072 list_del_init(&vma->mm_list);
3073 if (i915_is_ggtt(vma->vm)) {
3074 if (vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) {
3075 obj->map_and_fenceable = false;
3076 } else if (vma->ggtt_view.pages) {
3077 sg_free_table(vma->ggtt_view.pages);
3078 kfree(vma->ggtt_view.pages);
3079 vma->ggtt_view.pages = NULL;
3083 drm_mm_remove_node(&vma->node);
3084 i915_gem_vma_destroy(vma);
3086 /* Since the unbound list is global, only move to that list if
3087 * no more VMAs exist. */
3088 if (list_empty(&obj->vma_list)) {
3089 /* Throw away the active reference before
3090 * moving to the unbound list. */
3091 i915_gem_object_retire(obj);
3093 i915_gem_gtt_finish_object(obj);
3094 list_move_tail(&obj->global_list, &dev_priv->mm.unbound_list);
3097 /* And finally now the object is completely decoupled from this vma,
3098 * we can drop its hold on the backing storage and allow it to be
3099 * reaped by the shrinker.
3101 i915_gem_object_unpin_pages(obj);
3106 int i915_gpu_idle(struct drm_device *dev)
3108 struct drm_i915_private *dev_priv = dev->dev_private;
3109 struct intel_engine_cs *ring;
3112 /* Flush everything onto the inactive list. */
3113 for_each_ring(ring, dev_priv, i) {
3114 if (!i915.enable_execlists) {
3115 ret = i915_switch_context(ring, ring->default_context);
3120 ret = intel_ring_idle(ring);
3128 static void i965_write_fence_reg(struct drm_device *dev, int reg,
3129 struct drm_i915_gem_object *obj)
3131 struct drm_i915_private *dev_priv = dev->dev_private;
3133 int fence_pitch_shift;
3135 if (INTEL_INFO(dev)->gen >= 6) {
3136 fence_reg = FENCE_REG_SANDYBRIDGE_0;
3137 fence_pitch_shift = SANDYBRIDGE_FENCE_PITCH_SHIFT;
3139 fence_reg = FENCE_REG_965_0;
3140 fence_pitch_shift = I965_FENCE_PITCH_SHIFT;
3143 fence_reg += reg * 8;
3145 /* To w/a incoherency with non-atomic 64-bit register updates,
3146 * we split the 64-bit update into two 32-bit writes. In order
3147 * for a partial fence not to be evaluated between writes, we
3148 * precede the update with write to turn off the fence register,
3149 * and only enable the fence as the last step.
3151 * For extra levels of paranoia, we make sure each step lands
3152 * before applying the next step.
3154 I915_WRITE(fence_reg, 0);
3155 POSTING_READ(fence_reg);
3158 u32 size = i915_gem_obj_ggtt_size(obj);
3161 /* Adjust fence size to match tiled area */
3162 if (obj->tiling_mode != I915_TILING_NONE) {
3163 uint32_t row_size = obj->stride *
3164 (obj->tiling_mode == I915_TILING_Y ? 32 : 8);
3165 size = (size / row_size) * row_size;
3168 val = (uint64_t)((i915_gem_obj_ggtt_offset(obj) + size - 4096) &
3170 val |= i915_gem_obj_ggtt_offset(obj) & 0xfffff000;
3171 val |= (uint64_t)((obj->stride / 128) - 1) << fence_pitch_shift;
3172 if (obj->tiling_mode == I915_TILING_Y)
3173 val |= 1 << I965_FENCE_TILING_Y_SHIFT;
3174 val |= I965_FENCE_REG_VALID;
3176 I915_WRITE(fence_reg + 4, val >> 32);
3177 POSTING_READ(fence_reg + 4);
3179 I915_WRITE(fence_reg + 0, val);
3180 POSTING_READ(fence_reg);
3182 I915_WRITE(fence_reg + 4, 0);
3183 POSTING_READ(fence_reg + 4);
3187 static void i915_write_fence_reg(struct drm_device *dev, int reg,
3188 struct drm_i915_gem_object *obj)
3190 struct drm_i915_private *dev_priv = dev->dev_private;
3194 u32 size = i915_gem_obj_ggtt_size(obj);
3198 WARN((i915_gem_obj_ggtt_offset(obj) & ~I915_FENCE_START_MASK) ||
3199 (size & -size) != size ||
3200 (i915_gem_obj_ggtt_offset(obj) & (size - 1)),
3201 "object 0x%08lx [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
3202 i915_gem_obj_ggtt_offset(obj), obj->map_and_fenceable, size);
3204 if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev))
3209 /* Note: pitch better be a power of two tile widths */
3210 pitch_val = obj->stride / tile_width;
3211 pitch_val = ffs(pitch_val) - 1;
3213 val = i915_gem_obj_ggtt_offset(obj);
3214 if (obj->tiling_mode == I915_TILING_Y)
3215 val |= 1 << I830_FENCE_TILING_Y_SHIFT;
3216 val |= I915_FENCE_SIZE_BITS(size);
3217 val |= pitch_val << I830_FENCE_PITCH_SHIFT;
3218 val |= I830_FENCE_REG_VALID;
3223 reg = FENCE_REG_830_0 + reg * 4;
3225 reg = FENCE_REG_945_8 + (reg - 8) * 4;
3227 I915_WRITE(reg, val);
3231 static void i830_write_fence_reg(struct drm_device *dev, int reg,
3232 struct drm_i915_gem_object *obj)
3234 struct drm_i915_private *dev_priv = dev->dev_private;
3238 u32 size = i915_gem_obj_ggtt_size(obj);
3241 WARN((i915_gem_obj_ggtt_offset(obj) & ~I830_FENCE_START_MASK) ||
3242 (size & -size) != size ||
3243 (i915_gem_obj_ggtt_offset(obj) & (size - 1)),
3244 "object 0x%08lx not 512K or pot-size 0x%08x aligned\n",
3245 i915_gem_obj_ggtt_offset(obj), size);
3247 pitch_val = obj->stride / 128;
3248 pitch_val = ffs(pitch_val) - 1;
3250 val = i915_gem_obj_ggtt_offset(obj);
3251 if (obj->tiling_mode == I915_TILING_Y)
3252 val |= 1 << I830_FENCE_TILING_Y_SHIFT;
3253 val |= I830_FENCE_SIZE_BITS(size);
3254 val |= pitch_val << I830_FENCE_PITCH_SHIFT;
3255 val |= I830_FENCE_REG_VALID;
3259 I915_WRITE(FENCE_REG_830_0 + reg * 4, val);
3260 POSTING_READ(FENCE_REG_830_0 + reg * 4);
3263 inline static bool i915_gem_object_needs_mb(struct drm_i915_gem_object *obj)
3265 return obj && obj->base.read_domains & I915_GEM_DOMAIN_GTT;
3268 static void i915_gem_write_fence(struct drm_device *dev, int reg,
3269 struct drm_i915_gem_object *obj)
3271 struct drm_i915_private *dev_priv = dev->dev_private;
3273 /* Ensure that all CPU reads are completed before installing a fence
3274 * and all writes before removing the fence.
3276 if (i915_gem_object_needs_mb(dev_priv->fence_regs[reg].obj))
3279 WARN(obj && (!obj->stride || !obj->tiling_mode),
3280 "bogus fence setup with stride: 0x%x, tiling mode: %i\n",
3281 obj->stride, obj->tiling_mode);
3284 i830_write_fence_reg(dev, reg, obj);
3285 else if (IS_GEN3(dev))
3286 i915_write_fence_reg(dev, reg, obj);
3287 else if (INTEL_INFO(dev)->gen >= 4)
3288 i965_write_fence_reg(dev, reg, obj);
3290 /* And similarly be paranoid that no direct access to this region
3291 * is reordered to before the fence is installed.
3293 if (i915_gem_object_needs_mb(obj))
3297 static inline int fence_number(struct drm_i915_private *dev_priv,
3298 struct drm_i915_fence_reg *fence)
3300 return fence - dev_priv->fence_regs;
3303 static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj,
3304 struct drm_i915_fence_reg *fence,
3307 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3308 int reg = fence_number(dev_priv, fence);
3310 i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL);
3313 obj->fence_reg = reg;
3315 list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list);
3317 obj->fence_reg = I915_FENCE_REG_NONE;
3319 list_del_init(&fence->lru_list);
3321 obj->fence_dirty = false;
3325 i915_gem_object_wait_fence(struct drm_i915_gem_object *obj)
3327 if (obj->last_fenced_req) {
3328 int ret = i915_wait_request(obj->last_fenced_req);
3332 i915_gem_request_assign(&obj->last_fenced_req, NULL);
3339 i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
3341 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3342 struct drm_i915_fence_reg *fence;
3345 ret = i915_gem_object_wait_fence(obj);
3349 if (obj->fence_reg == I915_FENCE_REG_NONE)
3352 fence = &dev_priv->fence_regs[obj->fence_reg];
3354 if (WARN_ON(fence->pin_count))
3357 i915_gem_object_fence_lost(obj);
3358 i915_gem_object_update_fence(obj, fence, false);
3363 static struct drm_i915_fence_reg *
3364 i915_find_fence_reg(struct drm_device *dev)
3366 struct drm_i915_private *dev_priv = dev->dev_private;
3367 struct drm_i915_fence_reg *reg, *avail;
3370 /* First try to find a free reg */
3372 for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) {
3373 reg = &dev_priv->fence_regs[i];
3377 if (!reg->pin_count)
3384 /* None available, try to steal one or wait for a user to finish */
3385 list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) {
3393 /* Wait for completion of pending flips which consume fences */
3394 if (intel_has_pending_fb_unpin(dev))
3395 return ERR_PTR(-EAGAIN);
3397 return ERR_PTR(-EDEADLK);
3401 * i915_gem_object_get_fence - set up fencing for an object
3402 * @obj: object to map through a fence reg
3404 * When mapping objects through the GTT, userspace wants to be able to write
3405 * to them without having to worry about swizzling if the object is tiled.
3406 * This function walks the fence regs looking for a free one for @obj,
3407 * stealing one if it can't find any.
3409 * It then sets up the reg based on the object's properties: address, pitch
3410 * and tiling format.
3412 * For an untiled surface, this removes any existing fence.
3415 i915_gem_object_get_fence(struct drm_i915_gem_object *obj)
3417 struct drm_device *dev = obj->base.dev;
3418 struct drm_i915_private *dev_priv = dev->dev_private;
3419 bool enable = obj->tiling_mode != I915_TILING_NONE;
3420 struct drm_i915_fence_reg *reg;
3423 /* Have we updated the tiling parameters upon the object and so
3424 * will need to serialise the write to the associated fence register?
3426 if (obj->fence_dirty) {
3427 ret = i915_gem_object_wait_fence(obj);
3432 /* Just update our place in the LRU if our fence is getting reused. */
3433 if (obj->fence_reg != I915_FENCE_REG_NONE) {
3434 reg = &dev_priv->fence_regs[obj->fence_reg];
3435 if (!obj->fence_dirty) {
3436 list_move_tail(®->lru_list,
3437 &dev_priv->mm.fence_list);
3440 } else if (enable) {
3441 if (WARN_ON(!obj->map_and_fenceable))
3444 reg = i915_find_fence_reg(dev);
3446 return PTR_ERR(reg);
3449 struct drm_i915_gem_object *old = reg->obj;
3451 ret = i915_gem_object_wait_fence(old);
3455 i915_gem_object_fence_lost(old);
3460 i915_gem_object_update_fence(obj, reg, enable);
3465 static bool i915_gem_valid_gtt_space(struct i915_vma *vma,
3466 unsigned long cache_level)
3468 struct drm_mm_node *gtt_space = &vma->node;
3469 struct drm_mm_node *other;
3472 * On some machines we have to be careful when putting differing types
3473 * of snoopable memory together to avoid the prefetcher crossing memory
3474 * domains and dying. During vm initialisation, we decide whether or not
3475 * these constraints apply and set the drm_mm.color_adjust
3478 if (vma->vm->mm.color_adjust == NULL)
3481 if (!drm_mm_node_allocated(gtt_space))
3484 if (list_empty(>t_space->node_list))
3487 other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list);
3488 if (other->allocated && !other->hole_follows && other->color != cache_level)
3491 other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list);
3492 if (other->allocated && !gtt_space->hole_follows && other->color != cache_level)
3499 * Finds free space in the GTT aperture and binds the object there.
3501 static struct i915_vma *
3502 i915_gem_object_bind_to_vm(struct drm_i915_gem_object *obj,
3503 struct i915_address_space *vm,
3504 const struct i915_ggtt_view *ggtt_view,
3508 struct drm_device *dev = obj->base.dev;
3509 struct drm_i915_private *dev_priv = dev->dev_private;
3510 u32 size, fence_size, fence_alignment, unfenced_alignment;
3511 unsigned long start =
3512 flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;
3514 flags & PIN_MAPPABLE ? dev_priv->gtt.mappable_end : vm->total;
3515 struct i915_vma *vma;
3518 if(WARN_ON(i915_is_ggtt(vm) != !!ggtt_view))
3519 return ERR_PTR(-EINVAL);
3521 fence_size = i915_gem_get_gtt_size(dev,
3524 fence_alignment = i915_gem_get_gtt_alignment(dev,
3526 obj->tiling_mode, true);
3527 unfenced_alignment =
3528 i915_gem_get_gtt_alignment(dev,
3530 obj->tiling_mode, false);
3533 alignment = flags & PIN_MAPPABLE ? fence_alignment :
3535 if (flags & PIN_MAPPABLE && alignment & (fence_alignment - 1)) {
3536 DRM_DEBUG("Invalid object alignment requested %u\n", alignment);
3537 return ERR_PTR(-EINVAL);
3540 size = flags & PIN_MAPPABLE ? fence_size : obj->base.size;
3542 /* If the object is bigger than the entire aperture, reject it early
3543 * before evicting everything in a vain attempt to find space.
3545 if (obj->base.size > end) {
3546 DRM_DEBUG("Attempting to bind an object larger than the aperture: object=%zd > %s aperture=%lu\n",
3548 flags & PIN_MAPPABLE ? "mappable" : "total",
3550 return ERR_PTR(-E2BIG);
3553 ret = i915_gem_object_get_pages(obj);
3555 return ERR_PTR(ret);
3557 i915_gem_object_pin_pages(obj);
3559 vma = ggtt_view ? i915_gem_obj_lookup_or_create_ggtt_vma(obj, ggtt_view) :
3560 i915_gem_obj_lookup_or_create_vma(obj, vm);
3566 ret = drm_mm_insert_node_in_range_generic(&vm->mm, &vma->node,
3570 DRM_MM_SEARCH_DEFAULT,
3571 DRM_MM_CREATE_DEFAULT);
3573 ret = i915_gem_evict_something(dev, vm, size, alignment,
3582 if (WARN_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level))) {
3584 goto err_remove_node;
3587 ret = i915_gem_gtt_prepare_object(obj);
3589 goto err_remove_node;
3591 trace_i915_vma_bind(vma, flags);
3592 ret = i915_vma_bind(vma, obj->cache_level,
3593 flags & PIN_GLOBAL ? GLOBAL_BIND : 0);
3595 goto err_finish_gtt;
3597 list_move_tail(&obj->global_list, &dev_priv->mm.bound_list);
3598 list_add_tail(&vma->mm_list, &vm->inactive_list);
3603 i915_gem_gtt_finish_object(obj);
3605 drm_mm_remove_node(&vma->node);
3607 i915_gem_vma_destroy(vma);
3610 i915_gem_object_unpin_pages(obj);
3615 i915_gem_clflush_object(struct drm_i915_gem_object *obj,
3618 /* If we don't have a page list set up, then we're not pinned
3619 * to GPU, and we can ignore the cache flush because it'll happen
3620 * again at bind time.
3622 if (obj->pages == NULL)
3626 * Stolen memory is always coherent with the GPU as it is explicitly
3627 * marked as wc by the system, or the system is cache-coherent.
3629 if (obj->stolen || obj->phys_handle)
3632 /* If the GPU is snooping the contents of the CPU cache,
3633 * we do not need to manually clear the CPU cache lines. However,
3634 * the caches are only snooped when the render cache is
3635 * flushed/invalidated. As we always have to emit invalidations
3636 * and flushes when moving into and out of the RENDER domain, correct
3637 * snooping behaviour occurs naturally as the result of our domain
3640 if (!force && cpu_cache_is_coherent(obj->base.dev, obj->cache_level)) {
3641 obj->cache_dirty = true;
3645 trace_i915_gem_object_clflush(obj);
3646 drm_clflush_sg(obj->pages);
3647 obj->cache_dirty = false;
3652 /** Flushes the GTT write domain for the object if it's dirty. */
3654 i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj)
3656 uint32_t old_write_domain;
3658 if (obj->base.write_domain != I915_GEM_DOMAIN_GTT)
3661 /* No actual flushing is required for the GTT write domain. Writes
3662 * to it immediately go to main memory as far as we know, so there's
3663 * no chipset flush. It also doesn't land in render cache.
3665 * However, we do have to enforce the order so that all writes through
3666 * the GTT land before any writes to the device, such as updates to
3671 old_write_domain = obj->base.write_domain;
3672 obj->base.write_domain = 0;
3674 intel_fb_obj_flush(obj, false);
3676 trace_i915_gem_object_change_domain(obj,
3677 obj->base.read_domains,
3681 /** Flushes the CPU write domain for the object if it's dirty. */
3683 i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj)
3685 uint32_t old_write_domain;
3687 if (obj->base.write_domain != I915_GEM_DOMAIN_CPU)
3690 if (i915_gem_clflush_object(obj, obj->pin_display))
3691 i915_gem_chipset_flush(obj->base.dev);
3693 old_write_domain = obj->base.write_domain;
3694 obj->base.write_domain = 0;
3696 intel_fb_obj_flush(obj, false);
3698 trace_i915_gem_object_change_domain(obj,
3699 obj->base.read_domains,
3704 * Moves a single object to the GTT read, and possibly write domain.
3706 * This function returns when the move is complete, including waiting on
3710 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
3712 uint32_t old_write_domain, old_read_domains;
3713 struct i915_vma *vma;
3716 if (obj->base.write_domain == I915_GEM_DOMAIN_GTT)
3719 ret = i915_gem_object_wait_rendering(obj, !write);
3723 i915_gem_object_retire(obj);
3725 /* Flush and acquire obj->pages so that we are coherent through
3726 * direct access in memory with previous cached writes through
3727 * shmemfs and that our cache domain tracking remains valid.
3728 * For example, if the obj->filp was moved to swap without us
3729 * being notified and releasing the pages, we would mistakenly
3730 * continue to assume that the obj remained out of the CPU cached
3733 ret = i915_gem_object_get_pages(obj);
3737 i915_gem_object_flush_cpu_write_domain(obj);
3739 /* Serialise direct access to this object with the barriers for
3740 * coherent writes from the GPU, by effectively invalidating the
3741 * GTT domain upon first access.
3743 if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
3746 old_write_domain = obj->base.write_domain;
3747 old_read_domains = obj->base.read_domains;
3749 /* It should now be out of any other write domains, and we can update
3750 * the domain values for our changes.
3752 BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0);
3753 obj->base.read_domains |= I915_GEM_DOMAIN_GTT;
3755 obj->base.read_domains = I915_GEM_DOMAIN_GTT;
3756 obj->base.write_domain = I915_GEM_DOMAIN_GTT;
3761 intel_fb_obj_invalidate(obj, NULL, ORIGIN_GTT);
3763 trace_i915_gem_object_change_domain(obj,
3767 /* And bump the LRU for this access */
3768 vma = i915_gem_obj_to_ggtt(obj);
3769 if (vma && drm_mm_node_allocated(&vma->node) && !obj->active)
3770 list_move_tail(&vma->mm_list,
3771 &to_i915(obj->base.dev)->gtt.base.inactive_list);
3776 int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
3777 enum i915_cache_level cache_level)
3779 struct drm_device *dev = obj->base.dev;
3780 struct i915_vma *vma, *next;
3783 if (obj->cache_level == cache_level)
3786 if (i915_gem_obj_is_pinned(obj)) {
3787 DRM_DEBUG("can not change the cache level of pinned objects\n");
3791 list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) {
3792 if (!i915_gem_valid_gtt_space(vma, cache_level)) {
3793 ret = i915_vma_unbind(vma);
3799 if (i915_gem_obj_bound_any(obj)) {
3800 ret = i915_gem_object_finish_gpu(obj);
3804 i915_gem_object_finish_gtt(obj);
3806 /* Before SandyBridge, you could not use tiling or fence
3807 * registers with snooped memory, so relinquish any fences
3808 * currently pointing to our region in the aperture.
3810 if (INTEL_INFO(dev)->gen < 6) {
3811 ret = i915_gem_object_put_fence(obj);
3816 list_for_each_entry(vma, &obj->vma_list, vma_link)
3817 if (drm_mm_node_allocated(&vma->node)) {
3818 ret = i915_vma_bind(vma, cache_level,
3819 vma->bound & GLOBAL_BIND);
3825 list_for_each_entry(vma, &obj->vma_list, vma_link)
3826 vma->node.color = cache_level;
3827 obj->cache_level = cache_level;
3829 if (obj->cache_dirty &&
3830 obj->base.write_domain != I915_GEM_DOMAIN_CPU &&
3831 cpu_write_needs_clflush(obj)) {
3832 if (i915_gem_clflush_object(obj, true))
3833 i915_gem_chipset_flush(obj->base.dev);
3839 int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data,
3840 struct drm_file *file)
3842 struct drm_i915_gem_caching *args = data;
3843 struct drm_i915_gem_object *obj;
3846 ret = i915_mutex_lock_interruptible(dev);
3850 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
3851 if (&obj->base == NULL) {
3856 switch (obj->cache_level) {
3857 case I915_CACHE_LLC:
3858 case I915_CACHE_L3_LLC:
3859 args->caching = I915_CACHING_CACHED;
3863 args->caching = I915_CACHING_DISPLAY;
3867 args->caching = I915_CACHING_NONE;
3871 drm_gem_object_unreference(&obj->base);
3873 mutex_unlock(&dev->struct_mutex);
3877 int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
3878 struct drm_file *file)
3880 struct drm_i915_gem_caching *args = data;
3881 struct drm_i915_gem_object *obj;
3882 enum i915_cache_level level;
3885 switch (args->caching) {
3886 case I915_CACHING_NONE:
3887 level = I915_CACHE_NONE;
3889 case I915_CACHING_CACHED:
3890 level = I915_CACHE_LLC;
3892 case I915_CACHING_DISPLAY:
3893 level = HAS_WT(dev) ? I915_CACHE_WT : I915_CACHE_NONE;
3899 ret = i915_mutex_lock_interruptible(dev);
3903 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
3904 if (&obj->base == NULL) {
3909 ret = i915_gem_object_set_cache_level(obj, level);
3911 drm_gem_object_unreference(&obj->base);
3913 mutex_unlock(&dev->struct_mutex);
3917 static bool is_pin_display(struct drm_i915_gem_object *obj)
3919 struct i915_vma *vma;
3921 vma = i915_gem_obj_to_ggtt(obj);
3925 /* There are 2 sources that pin objects:
3926 * 1. The display engine (scanouts, sprites, cursors);
3927 * 2. Reservations for execbuffer;
3929 * We can ignore reservations as we hold the struct_mutex and
3930 * are only called outside of the reservation path.
3932 return vma->pin_count;
3936 * Prepare buffer for display plane (scanout, cursors, etc).
3937 * Can be called from an uninterruptible phase (modesetting) and allows
3938 * any flushes to be pipelined (for pageflips).
3941 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
3943 struct intel_engine_cs *pipelined,
3944 const struct i915_ggtt_view *view)
3946 u32 old_read_domains, old_write_domain;
3947 bool was_pin_display;
3950 if (pipelined != i915_gem_request_get_ring(obj->last_read_req)) {
3951 ret = i915_gem_object_sync(obj, pipelined);
3956 /* Mark the pin_display early so that we account for the
3957 * display coherency whilst setting up the cache domains.
3959 was_pin_display = obj->pin_display;
3960 obj->pin_display = true;
3962 /* The display engine is not coherent with the LLC cache on gen6. As
3963 * a result, we make sure that the pinning that is about to occur is
3964 * done with uncached PTEs. This is lowest common denominator for all
3967 * However for gen6+, we could do better by using the GFDT bit instead
3968 * of uncaching, which would allow us to flush all the LLC-cached data
3969 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
3971 ret = i915_gem_object_set_cache_level(obj,
3972 HAS_WT(obj->base.dev) ? I915_CACHE_WT : I915_CACHE_NONE);
3974 goto err_unpin_display;
3976 /* As the user may map the buffer once pinned in the display plane
3977 * (e.g. libkms for the bootup splash), we have to ensure that we
3978 * always use map_and_fenceable for all scanout buffers.
3980 ret = i915_gem_object_ggtt_pin(obj, view, alignment,
3981 view->type == I915_GGTT_VIEW_NORMAL ?
3984 goto err_unpin_display;
3986 i915_gem_object_flush_cpu_write_domain(obj);
3988 old_write_domain = obj->base.write_domain;
3989 old_read_domains = obj->base.read_domains;
3991 /* It should now be out of any other write domains, and we can update
3992 * the domain values for our changes.
3994 obj->base.write_domain = 0;
3995 obj->base.read_domains |= I915_GEM_DOMAIN_GTT;
3997 trace_i915_gem_object_change_domain(obj,
4004 WARN_ON(was_pin_display != is_pin_display(obj));
4005 obj->pin_display = was_pin_display;
4010 i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj,
4011 const struct i915_ggtt_view *view)
4013 i915_gem_object_ggtt_unpin_view(obj, view);
4015 obj->pin_display = is_pin_display(obj);
4019 i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj)
4023 if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0)
4026 ret = i915_gem_object_wait_rendering(obj, false);
4030 /* Ensure that we invalidate the GPU's caches and TLBs. */
4031 obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS;
4036 * Moves a single object to the CPU read, and possibly write domain.
4038 * This function returns when the move is complete, including waiting on
4042 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write)
4044 uint32_t old_write_domain, old_read_domains;
4047 if (obj->base.write_domain == I915_GEM_DOMAIN_CPU)
4050 ret = i915_gem_object_wait_rendering(obj, !write);
4054 i915_gem_object_retire(obj);
4055 i915_gem_object_flush_gtt_write_domain(obj);
4057 old_write_domain = obj->base.write_domain;
4058 old_read_domains = obj->base.read_domains;
4060 /* Flush the CPU cache if it's still invalid. */
4061 if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) {
4062 i915_gem_clflush_object(obj, false);
4064 obj->base.read_domains |= I915_GEM_DOMAIN_CPU;
4067 /* It should now be out of any other write domains, and we can update
4068 * the domain values for our changes.
4070 BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0);
4072 /* If we're writing through the CPU, then the GPU read domains will
4073 * need to be invalidated at next use.
4076 obj->base.read_domains = I915_GEM_DOMAIN_CPU;
4077 obj->base.write_domain = I915_GEM_DOMAIN_CPU;
4081 intel_fb_obj_invalidate(obj, NULL, ORIGIN_CPU);
4083 trace_i915_gem_object_change_domain(obj,
4090 /* Throttle our rendering by waiting until the ring has completed our requests
4091 * emitted over 20 msec ago.
4093 * Note that if we were to use the current jiffies each time around the loop,
4094 * we wouldn't escape the function with any frames outstanding if the time to
4095 * render a frame was over 20ms.
4097 * This should get us reasonable parallelism between CPU and GPU but also
4098 * relatively low latency when blocking on a particular request to finish.
4101 i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file)
4103 struct drm_i915_private *dev_priv = dev->dev_private;
4104 struct drm_i915_file_private *file_priv = file->driver_priv;
4105 unsigned long recent_enough = jiffies - msecs_to_jiffies(20);
4106 struct drm_i915_gem_request *request, *target = NULL;
4107 unsigned reset_counter;
4110 ret = i915_gem_wait_for_error(&dev_priv->gpu_error);
4114 ret = i915_gem_check_wedge(&dev_priv->gpu_error, false);
4118 spin_lock(&file_priv->mm.lock);
4119 list_for_each_entry(request, &file_priv->mm.request_list, client_list) {
4120 if (time_after_eq(request->emitted_jiffies, recent_enough))
4125 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
4127 i915_gem_request_reference(target);
4128 spin_unlock(&file_priv->mm.lock);
4133 ret = __i915_wait_request(target, reset_counter, true, NULL, NULL);
4135 queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0);
4137 i915_gem_request_unreference__unlocked(target);
4143 i915_vma_misplaced(struct i915_vma *vma, uint32_t alignment, uint64_t flags)
4145 struct drm_i915_gem_object *obj = vma->obj;
4148 vma->node.start & (alignment - 1))
4151 if (flags & PIN_MAPPABLE && !obj->map_and_fenceable)
4154 if (flags & PIN_OFFSET_BIAS &&
4155 vma->node.start < (flags & PIN_OFFSET_MASK))
4162 i915_gem_object_do_pin(struct drm_i915_gem_object *obj,
4163 struct i915_address_space *vm,
4164 const struct i915_ggtt_view *ggtt_view,
4168 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
4169 struct i915_vma *vma;
4173 if (WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base))
4176 if (WARN_ON(flags & (PIN_GLOBAL | PIN_MAPPABLE) && !i915_is_ggtt(vm)))
4179 if (WARN_ON((flags & (PIN_MAPPABLE | PIN_GLOBAL)) == PIN_MAPPABLE))
4182 if (WARN_ON(i915_is_ggtt(vm) != !!ggtt_view))
4185 vma = ggtt_view ? i915_gem_obj_to_ggtt_view(obj, ggtt_view) :
4186 i915_gem_obj_to_vma(obj, vm);
4189 return PTR_ERR(vma);
4192 if (WARN_ON(vma->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT))
4195 if (i915_vma_misplaced(vma, alignment, flags)) {
4196 unsigned long offset;
4197 offset = ggtt_view ? i915_gem_obj_ggtt_offset_view(obj, ggtt_view) :
4198 i915_gem_obj_offset(obj, vm);
4199 WARN(vma->pin_count,
4200 "bo is already pinned in %s with incorrect alignment:"
4201 " offset=%lx, req.alignment=%x, req.map_and_fenceable=%d,"
4202 " obj->map_and_fenceable=%d\n",
4203 ggtt_view ? "ggtt" : "ppgtt",
4206 !!(flags & PIN_MAPPABLE),
4207 obj->map_and_fenceable);
4208 ret = i915_vma_unbind(vma);
4216 bound = vma ? vma->bound : 0;
4217 if (vma == NULL || !drm_mm_node_allocated(&vma->node)) {
4218 /* In true PPGTT, bind has possibly changed PDEs, which
4219 * means we must do a context switch before the GPU can
4220 * accurately read some of the VMAs.
4222 vma = i915_gem_object_bind_to_vm(obj, vm, ggtt_view, alignment,
4225 return PTR_ERR(vma);
4228 if (flags & PIN_GLOBAL && !(vma->bound & GLOBAL_BIND)) {
4229 ret = i915_vma_bind(vma, obj->cache_level, GLOBAL_BIND);
4234 if ((bound ^ vma->bound) & GLOBAL_BIND) {
4235 bool mappable, fenceable;
4236 u32 fence_size, fence_alignment;
4238 fence_size = i915_gem_get_gtt_size(obj->base.dev,
4241 fence_alignment = i915_gem_get_gtt_alignment(obj->base.dev,
4246 fenceable = (vma->node.size == fence_size &&
4247 (vma->node.start & (fence_alignment - 1)) == 0);
4249 mappable = (vma->node.start + fence_size <=
4250 dev_priv->gtt.mappable_end);
4252 obj->map_and_fenceable = mappable && fenceable;
4255 WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable);
4262 i915_gem_object_pin(struct drm_i915_gem_object *obj,
4263 struct i915_address_space *vm,
4267 return i915_gem_object_do_pin(obj, vm,
4268 i915_is_ggtt(vm) ? &i915_ggtt_view_normal : NULL,
4273 i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
4274 const struct i915_ggtt_view *view,
4278 if (WARN_ONCE(!view, "no view specified"))
4281 return i915_gem_object_do_pin(obj, i915_obj_to_ggtt(obj), view,
4282 alignment, flags | PIN_GLOBAL);
4286 i915_gem_object_ggtt_unpin_view(struct drm_i915_gem_object *obj,
4287 const struct i915_ggtt_view *view)
4289 struct i915_vma *vma = i915_gem_obj_to_ggtt_view(obj, view);
4292 WARN_ON(vma->pin_count == 0);
4293 WARN_ON(!i915_gem_obj_ggtt_bound_view(obj, view));
4299 i915_gem_object_pin_fence(struct drm_i915_gem_object *obj)
4301 if (obj->fence_reg != I915_FENCE_REG_NONE) {
4302 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
4303 struct i915_vma *ggtt_vma = i915_gem_obj_to_ggtt(obj);
4305 WARN_ON(!ggtt_vma ||
4306 dev_priv->fence_regs[obj->fence_reg].pin_count >
4307 ggtt_vma->pin_count);
4308 dev_priv->fence_regs[obj->fence_reg].pin_count++;
4315 i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj)
4317 if (obj->fence_reg != I915_FENCE_REG_NONE) {
4318 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
4319 WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count <= 0);
4320 dev_priv->fence_regs[obj->fence_reg].pin_count--;
4325 i915_gem_busy_ioctl(struct drm_device *dev, void *data,
4326 struct drm_file *file)
4328 struct drm_i915_gem_busy *args = data;
4329 struct drm_i915_gem_object *obj;
4332 ret = i915_mutex_lock_interruptible(dev);
4336 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
4337 if (&obj->base == NULL) {
4342 /* Count all active objects as busy, even if they are currently not used
4343 * by the gpu. Users of this interface expect objects to eventually
4344 * become non-busy without any further actions, therefore emit any
4345 * necessary flushes here.
4347 ret = i915_gem_object_flush_active(obj);
4349 args->busy = obj->active;
4350 if (obj->last_read_req) {
4351 struct intel_engine_cs *ring;
4352 BUILD_BUG_ON(I915_NUM_RINGS > 16);
4353 ring = i915_gem_request_get_ring(obj->last_read_req);
4354 args->busy |= intel_ring_flag(ring) << 16;
4357 drm_gem_object_unreference(&obj->base);
4359 mutex_unlock(&dev->struct_mutex);
4364 i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
4365 struct drm_file *file_priv)
4367 return i915_gem_ring_throttle(dev, file_priv);
4371 i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
4372 struct drm_file *file_priv)
4374 struct drm_i915_private *dev_priv = dev->dev_private;
4375 struct drm_i915_gem_madvise *args = data;
4376 struct drm_i915_gem_object *obj;
4379 switch (args->madv) {
4380 case I915_MADV_DONTNEED:
4381 case I915_MADV_WILLNEED:
4387 ret = i915_mutex_lock_interruptible(dev);
4391 obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle));
4392 if (&obj->base == NULL) {
4397 if (i915_gem_obj_is_pinned(obj)) {
4403 obj->tiling_mode != I915_TILING_NONE &&
4404 dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) {
4405 if (obj->madv == I915_MADV_WILLNEED)
4406 i915_gem_object_unpin_pages(obj);
4407 if (args->madv == I915_MADV_WILLNEED)
4408 i915_gem_object_pin_pages(obj);
4411 if (obj->madv != __I915_MADV_PURGED)
4412 obj->madv = args->madv;
4414 /* if the object is no longer attached, discard its backing storage */
4415 if (obj->madv == I915_MADV_DONTNEED && obj->pages == NULL)
4416 i915_gem_object_truncate(obj);
4418 args->retained = obj->madv != __I915_MADV_PURGED;
4421 drm_gem_object_unreference(&obj->base);
4423 mutex_unlock(&dev->struct_mutex);
4427 void i915_gem_object_init(struct drm_i915_gem_object *obj,
4428 const struct drm_i915_gem_object_ops *ops)
4430 INIT_LIST_HEAD(&obj->global_list);
4431 INIT_LIST_HEAD(&obj->ring_list);
4432 INIT_LIST_HEAD(&obj->obj_exec_link);
4433 INIT_LIST_HEAD(&obj->vma_list);
4434 INIT_LIST_HEAD(&obj->batch_pool_link);
4438 obj->fence_reg = I915_FENCE_REG_NONE;
4439 obj->madv = I915_MADV_WILLNEED;
4441 i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size);
4444 static const struct drm_i915_gem_object_ops i915_gem_object_ops = {
4445 .get_pages = i915_gem_object_get_pages_gtt,
4446 .put_pages = i915_gem_object_put_pages_gtt,
4449 struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
4452 struct drm_i915_gem_object *obj;
4453 struct address_space *mapping;
4456 obj = i915_gem_object_alloc(dev);
4460 if (drm_gem_object_init(dev, &obj->base, size) != 0) {
4461 i915_gem_object_free(obj);
4465 mask = GFP_HIGHUSER | __GFP_RECLAIMABLE;
4466 if (IS_CRESTLINE(dev) || IS_BROADWATER(dev)) {
4467 /* 965gm cannot relocate objects above 4GiB. */
4468 mask &= ~__GFP_HIGHMEM;
4469 mask |= __GFP_DMA32;
4472 mapping = file_inode(obj->base.filp)->i_mapping;
4473 mapping_set_gfp_mask(mapping, mask);
4475 i915_gem_object_init(obj, &i915_gem_object_ops);
4477 obj->base.write_domain = I915_GEM_DOMAIN_CPU;
4478 obj->base.read_domains = I915_GEM_DOMAIN_CPU;
4481 /* On some devices, we can have the GPU use the LLC (the CPU
4482 * cache) for about a 10% performance improvement
4483 * compared to uncached. Graphics requests other than
4484 * display scanout are coherent with the CPU in
4485 * accessing this cache. This means in this mode we
4486 * don't need to clflush on the CPU side, and on the
4487 * GPU side we only need to flush internal caches to
4488 * get data visible to the CPU.
4490 * However, we maintain the display planes as UC, and so
4491 * need to rebind when first used as such.
4493 obj->cache_level = I915_CACHE_LLC;
4495 obj->cache_level = I915_CACHE_NONE;
4497 trace_i915_gem_object_create(obj);
4502 static bool discard_backing_storage(struct drm_i915_gem_object *obj)
4504 /* If we are the last user of the backing storage (be it shmemfs
4505 * pages or stolen etc), we know that the pages are going to be
4506 * immediately released. In this case, we can then skip copying
4507 * back the contents from the GPU.
4510 if (obj->madv != I915_MADV_WILLNEED)
4513 if (obj->base.filp == NULL)
4516 /* At first glance, this looks racy, but then again so would be
4517 * userspace racing mmap against close. However, the first external
4518 * reference to the filp can only be obtained through the
4519 * i915_gem_mmap_ioctl() which safeguards us against the user
4520 * acquiring such a reference whilst we are in the middle of
4521 * freeing the object.
4523 return atomic_long_read(&obj->base.filp->f_count) == 1;
4526 void i915_gem_free_object(struct drm_gem_object *gem_obj)
4528 struct drm_i915_gem_object *obj = to_intel_bo(gem_obj);
4529 struct drm_device *dev = obj->base.dev;
4530 struct drm_i915_private *dev_priv = dev->dev_private;
4531 struct i915_vma *vma, *next;
4533 intel_runtime_pm_get(dev_priv);
4535 trace_i915_gem_object_destroy(obj);
4537 list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) {
4541 ret = i915_vma_unbind(vma);
4542 if (WARN_ON(ret == -ERESTARTSYS)) {
4543 bool was_interruptible;
4545 was_interruptible = dev_priv->mm.interruptible;
4546 dev_priv->mm.interruptible = false;
4548 WARN_ON(i915_vma_unbind(vma));
4550 dev_priv->mm.interruptible = was_interruptible;
4554 /* Stolen objects don't hold a ref, but do hold pin count. Fix that up
4555 * before progressing. */
4557 i915_gem_object_unpin_pages(obj);
4559 WARN_ON(obj->frontbuffer_bits);
4561 if (obj->pages && obj->madv == I915_MADV_WILLNEED &&
4562 dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES &&
4563 obj->tiling_mode != I915_TILING_NONE)
4564 i915_gem_object_unpin_pages(obj);
4566 if (WARN_ON(obj->pages_pin_count))
4567 obj->pages_pin_count = 0;
4568 if (discard_backing_storage(obj))
4569 obj->madv = I915_MADV_DONTNEED;
4570 i915_gem_object_put_pages(obj);
4571 i915_gem_object_free_mmap_offset(obj);
4575 if (obj->base.import_attach)
4576 drm_prime_gem_destroy(&obj->base, NULL);
4578 if (obj->ops->release)
4579 obj->ops->release(obj);
4581 drm_gem_object_release(&obj->base);
4582 i915_gem_info_remove_obj(dev_priv, obj->base.size);
4585 i915_gem_object_free(obj);
4587 intel_runtime_pm_put(dev_priv);
4590 struct i915_vma *i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
4591 struct i915_address_space *vm)
4593 struct i915_vma *vma;
4594 list_for_each_entry(vma, &obj->vma_list, vma_link) {
4595 if (i915_is_ggtt(vma->vm) &&
4596 vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL)
4604 struct i915_vma *i915_gem_obj_to_ggtt_view(struct drm_i915_gem_object *obj,
4605 const struct i915_ggtt_view *view)
4607 struct i915_address_space *ggtt = i915_obj_to_ggtt(obj);
4608 struct i915_vma *vma;
4610 if (WARN_ONCE(!view, "no view specified"))
4611 return ERR_PTR(-EINVAL);
4613 list_for_each_entry(vma, &obj->vma_list, vma_link)
4614 if (vma->vm == ggtt &&
4615 i915_ggtt_view_equal(&vma->ggtt_view, view))
4620 void i915_gem_vma_destroy(struct i915_vma *vma)
4622 struct i915_address_space *vm = NULL;
4623 WARN_ON(vma->node.allocated);
4625 /* Keep the vma as a placeholder in the execbuffer reservation lists */
4626 if (!list_empty(&vma->exec_list))
4631 if (!i915_is_ggtt(vm))
4632 i915_ppgtt_put(i915_vm_to_ppgtt(vm));
4634 list_del(&vma->vma_link);
4636 kmem_cache_free(to_i915(vma->obj->base.dev)->vmas, vma);
4640 i915_gem_stop_ringbuffers(struct drm_device *dev)
4642 struct drm_i915_private *dev_priv = dev->dev_private;
4643 struct intel_engine_cs *ring;
4646 for_each_ring(ring, dev_priv, i)
4647 dev_priv->gt.stop_ring(ring);
4651 i915_gem_suspend(struct drm_device *dev)
4653 struct drm_i915_private *dev_priv = dev->dev_private;
4656 mutex_lock(&dev->struct_mutex);
4657 ret = i915_gpu_idle(dev);
4661 i915_gem_retire_requests(dev);
4663 i915_gem_stop_ringbuffers(dev);
4664 mutex_unlock(&dev->struct_mutex);
4666 cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
4667 cancel_delayed_work_sync(&dev_priv->mm.retire_work);
4668 flush_delayed_work(&dev_priv->mm.idle_work);
4670 /* Assert that we sucessfully flushed all the work and
4671 * reset the GPU back to its idle, low power state.
4673 WARN_ON(dev_priv->mm.busy);
4678 mutex_unlock(&dev->struct_mutex);
4682 int i915_gem_l3_remap(struct intel_engine_cs *ring, int slice)
4684 struct drm_device *dev = ring->dev;
4685 struct drm_i915_private *dev_priv = dev->dev_private;
4686 u32 reg_base = GEN7_L3LOG_BASE + (slice * 0x200);
4687 u32 *remap_info = dev_priv->l3_parity.remap_info[slice];
4690 if (!HAS_L3_DPF(dev) || !remap_info)
4693 ret = intel_ring_begin(ring, GEN7_L3LOG_SIZE / 4 * 3);
4698 * Note: We do not worry about the concurrent register cacheline hang
4699 * here because no other code should access these registers other than
4700 * at initialization time.
4702 for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) {
4703 intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
4704 intel_ring_emit(ring, reg_base + i);
4705 intel_ring_emit(ring, remap_info[i/4]);
4708 intel_ring_advance(ring);
4713 void i915_gem_init_swizzling(struct drm_device *dev)
4715 struct drm_i915_private *dev_priv = dev->dev_private;
4717 if (INTEL_INFO(dev)->gen < 5 ||
4718 dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE)
4721 I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) |
4722 DISP_TILE_SURFACE_SWIZZLING);
4727 I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL);
4729 I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB));
4730 else if (IS_GEN7(dev))
4731 I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB));
4732 else if (IS_GEN8(dev))
4733 I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_BDW));
4739 intel_enable_blt(struct drm_device *dev)
4744 /* The blitter was dysfunctional on early prototypes */
4745 if (IS_GEN6(dev) && dev->pdev->revision < 8) {
4746 DRM_INFO("BLT not supported on this pre-production hardware;"
4747 " graphics performance will be degraded.\n");
4754 static void init_unused_ring(struct drm_device *dev, u32 base)
4756 struct drm_i915_private *dev_priv = dev->dev_private;
4758 I915_WRITE(RING_CTL(base), 0);
4759 I915_WRITE(RING_HEAD(base), 0);
4760 I915_WRITE(RING_TAIL(base), 0);
4761 I915_WRITE(RING_START(base), 0);
4764 static void init_unused_rings(struct drm_device *dev)
4767 init_unused_ring(dev, PRB1_BASE);
4768 init_unused_ring(dev, SRB0_BASE);
4769 init_unused_ring(dev, SRB1_BASE);
4770 init_unused_ring(dev, SRB2_BASE);
4771 init_unused_ring(dev, SRB3_BASE);
4772 } else if (IS_GEN2(dev)) {
4773 init_unused_ring(dev, SRB0_BASE);
4774 init_unused_ring(dev, SRB1_BASE);
4775 } else if (IS_GEN3(dev)) {
4776 init_unused_ring(dev, PRB1_BASE);
4777 init_unused_ring(dev, PRB2_BASE);
4781 int i915_gem_init_rings(struct drm_device *dev)
4783 struct drm_i915_private *dev_priv = dev->dev_private;
4786 ret = intel_init_render_ring_buffer(dev);
4791 ret = intel_init_bsd_ring_buffer(dev);
4793 goto cleanup_render_ring;
4796 if (intel_enable_blt(dev)) {
4797 ret = intel_init_blt_ring_buffer(dev);
4799 goto cleanup_bsd_ring;
4802 if (HAS_VEBOX(dev)) {
4803 ret = intel_init_vebox_ring_buffer(dev);
4805 goto cleanup_blt_ring;
4808 if (HAS_BSD2(dev)) {
4809 ret = intel_init_bsd2_ring_buffer(dev);
4811 goto cleanup_vebox_ring;
4814 ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000));
4816 goto cleanup_bsd2_ring;
4821 intel_cleanup_ring_buffer(&dev_priv->ring[VCS2]);
4823 intel_cleanup_ring_buffer(&dev_priv->ring[VECS]);
4825 intel_cleanup_ring_buffer(&dev_priv->ring[BCS]);
4827 intel_cleanup_ring_buffer(&dev_priv->ring[VCS]);
4828 cleanup_render_ring:
4829 intel_cleanup_ring_buffer(&dev_priv->ring[RCS]);
4835 i915_gem_init_hw(struct drm_device *dev)
4837 struct drm_i915_private *dev_priv = dev->dev_private;
4838 struct intel_engine_cs *ring;
4841 if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt())
4844 /* Double layer security blanket, see i915_gem_init() */
4845 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
4847 if (dev_priv->ellc_size)
4848 I915_WRITE(HSW_IDICR, I915_READ(HSW_IDICR) | IDIHASHMSK(0xf));
4850 if (IS_HASWELL(dev))
4851 I915_WRITE(MI_PREDICATE_RESULT_2, IS_HSW_GT3(dev) ?
4852 LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED);
4854 if (HAS_PCH_NOP(dev)) {
4855 if (IS_IVYBRIDGE(dev)) {
4856 u32 temp = I915_READ(GEN7_MSG_CTL);
4857 temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK);
4858 I915_WRITE(GEN7_MSG_CTL, temp);
4859 } else if (INTEL_INFO(dev)->gen >= 7) {
4860 u32 temp = I915_READ(HSW_NDE_RSTWRN_OPT);
4861 temp &= ~RESET_PCH_HANDSHAKE_ENABLE;
4862 I915_WRITE(HSW_NDE_RSTWRN_OPT, temp);
4866 i915_gem_init_swizzling(dev);
4869 * At least 830 can leave some of the unused rings
4870 * "active" (ie. head != tail) after resume which
4871 * will prevent c3 entry. Makes sure all unused rings
4874 init_unused_rings(dev);
4876 for_each_ring(ring, dev_priv, i) {
4877 ret = ring->init_hw(ring);
4882 for (i = 0; i < NUM_L3_SLICES(dev); i++)
4883 i915_gem_l3_remap(&dev_priv->ring[RCS], i);
4885 ret = i915_ppgtt_init_hw(dev);
4886 if (ret && ret != -EIO) {
4887 DRM_ERROR("PPGTT enable failed %d\n", ret);
4888 i915_gem_cleanup_ringbuffer(dev);
4891 ret = i915_gem_context_enable(dev_priv);
4892 if (ret && ret != -EIO) {
4893 DRM_ERROR("Context enable failed %d\n", ret);
4894 i915_gem_cleanup_ringbuffer(dev);
4900 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
4904 int i915_gem_init(struct drm_device *dev)
4906 struct drm_i915_private *dev_priv = dev->dev_private;
4909 i915.enable_execlists = intel_sanitize_enable_execlists(dev,
4910 i915.enable_execlists);
4912 mutex_lock(&dev->struct_mutex);
4914 if (IS_VALLEYVIEW(dev)) {
4915 /* VLVA0 (potential hack), BIOS isn't actually waking us */
4916 I915_WRITE(VLV_GTLC_WAKE_CTRL, VLV_GTLC_ALLOWWAKEREQ);
4917 if (wait_for((I915_READ(VLV_GTLC_PW_STATUS) &
4918 VLV_GTLC_ALLOWWAKEACK), 10))
4919 DRM_DEBUG_DRIVER("allow wake ack timed out\n");
4922 if (!i915.enable_execlists) {
4923 dev_priv->gt.execbuf_submit = i915_gem_ringbuffer_submission;
4924 dev_priv->gt.init_rings = i915_gem_init_rings;
4925 dev_priv->gt.cleanup_ring = intel_cleanup_ring_buffer;
4926 dev_priv->gt.stop_ring = intel_stop_ring_buffer;
4928 dev_priv->gt.execbuf_submit = intel_execlists_submission;
4929 dev_priv->gt.init_rings = intel_logical_rings_init;
4930 dev_priv->gt.cleanup_ring = intel_logical_ring_cleanup;
4931 dev_priv->gt.stop_ring = intel_logical_ring_stop;
4934 /* This is just a security blanket to placate dragons.
4935 * On some systems, we very sporadically observe that the first TLBs
4936 * used by the CS may be stale, despite us poking the TLB reset. If
4937 * we hold the forcewake during initialisation these problems
4938 * just magically go away.
4940 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
4942 ret = i915_gem_init_userptr(dev);
4946 i915_gem_init_global_gtt(dev);
4948 ret = i915_gem_context_init(dev);
4952 ret = dev_priv->gt.init_rings(dev);
4956 ret = i915_gem_init_hw(dev);
4958 /* Allow ring initialisation to fail by marking the GPU as
4959 * wedged. But we only want to do this where the GPU is angry,
4960 * for all other failure, such as an allocation failure, bail.
4962 DRM_ERROR("Failed to initialize GPU, declaring it wedged\n");
4963 atomic_set_mask(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
4968 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
4969 mutex_unlock(&dev->struct_mutex);
4975 i915_gem_cleanup_ringbuffer(struct drm_device *dev)
4977 struct drm_i915_private *dev_priv = dev->dev_private;
4978 struct intel_engine_cs *ring;
4981 for_each_ring(ring, dev_priv, i)
4982 dev_priv->gt.cleanup_ring(ring);
4986 init_ring_lists(struct intel_engine_cs *ring)
4988 INIT_LIST_HEAD(&ring->active_list);
4989 INIT_LIST_HEAD(&ring->request_list);
4992 void i915_init_vm(struct drm_i915_private *dev_priv,
4993 struct i915_address_space *vm)
4995 if (!i915_is_ggtt(vm))
4996 drm_mm_init(&vm->mm, vm->start, vm->total);
4997 vm->dev = dev_priv->dev;
4998 INIT_LIST_HEAD(&vm->active_list);
4999 INIT_LIST_HEAD(&vm->inactive_list);
5000 INIT_LIST_HEAD(&vm->global_link);
5001 list_add_tail(&vm->global_link, &dev_priv->vm_list);
5005 i915_gem_load(struct drm_device *dev)
5007 struct drm_i915_private *dev_priv = dev->dev_private;
5011 kmem_cache_create("i915_gem_object",
5012 sizeof(struct drm_i915_gem_object), 0,
5016 kmem_cache_create("i915_gem_vma",
5017 sizeof(struct i915_vma), 0,
5020 dev_priv->requests =
5021 kmem_cache_create("i915_gem_request",
5022 sizeof(struct drm_i915_gem_request), 0,
5026 INIT_LIST_HEAD(&dev_priv->vm_list);
5027 i915_init_vm(dev_priv, &dev_priv->gtt.base);
5029 INIT_LIST_HEAD(&dev_priv->context_list);
5030 INIT_LIST_HEAD(&dev_priv->mm.unbound_list);
5031 INIT_LIST_HEAD(&dev_priv->mm.bound_list);
5032 INIT_LIST_HEAD(&dev_priv->mm.fence_list);
5033 for (i = 0; i < I915_NUM_RINGS; i++)
5034 init_ring_lists(&dev_priv->ring[i]);
5035 for (i = 0; i < I915_MAX_NUM_FENCES; i++)
5036 INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list);
5037 INIT_DELAYED_WORK(&dev_priv->mm.retire_work,
5038 i915_gem_retire_work_handler);
5039 INIT_DELAYED_WORK(&dev_priv->mm.idle_work,
5040 i915_gem_idle_work_handler);
5041 init_waitqueue_head(&dev_priv->gpu_error.reset_queue);
5043 dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL;
5045 if (INTEL_INFO(dev)->gen >= 7 && !IS_VALLEYVIEW(dev))
5046 dev_priv->num_fence_regs = 32;
5047 else if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
5048 dev_priv->num_fence_regs = 16;
5050 dev_priv->num_fence_regs = 8;
5052 if (intel_vgpu_active(dev))
5053 dev_priv->num_fence_regs =
5054 I915_READ(vgtif_reg(avail_rs.fence_num));
5056 /* Initialize fence registers to zero */
5057 INIT_LIST_HEAD(&dev_priv->mm.fence_list);
5058 i915_gem_restore_fences(dev);
5060 i915_gem_detect_bit_6_swizzle(dev);
5061 init_waitqueue_head(&dev_priv->pending_flip_queue);
5063 dev_priv->mm.interruptible = true;
5065 i915_gem_shrinker_init(dev_priv);
5067 mutex_init(&dev_priv->fb_tracking.lock);
5070 void i915_gem_release(struct drm_device *dev, struct drm_file *file)
5072 struct drm_i915_file_private *file_priv = file->driver_priv;
5074 /* Clean up our request list when the client is going away, so that
5075 * later retire_requests won't dereference our soon-to-be-gone
5078 spin_lock(&file_priv->mm.lock);
5079 while (!list_empty(&file_priv->mm.request_list)) {
5080 struct drm_i915_gem_request *request;
5082 request = list_first_entry(&file_priv->mm.request_list,
5083 struct drm_i915_gem_request,
5085 list_del(&request->client_list);
5086 request->file_priv = NULL;
5088 spin_unlock(&file_priv->mm.lock);
5090 if (!list_empty(&file_priv->rps_boost)) {
5091 mutex_lock(&to_i915(dev)->rps.hw_lock);
5092 list_del(&file_priv->rps_boost);
5093 mutex_unlock(&to_i915(dev)->rps.hw_lock);
5097 int i915_gem_open(struct drm_device *dev, struct drm_file *file)
5099 struct drm_i915_file_private *file_priv;
5102 DRM_DEBUG_DRIVER("\n");
5104 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
5108 file->driver_priv = file_priv;
5109 file_priv->dev_priv = dev->dev_private;
5110 file_priv->file = file;
5111 INIT_LIST_HEAD(&file_priv->rps_boost);
5113 spin_lock_init(&file_priv->mm.lock);
5114 INIT_LIST_HEAD(&file_priv->mm.request_list);
5116 ret = i915_gem_context_open(dev, file);
5124 * i915_gem_track_fb - update frontbuffer tracking
5125 * old: current GEM buffer for the frontbuffer slots
5126 * new: new GEM buffer for the frontbuffer slots
5127 * frontbuffer_bits: bitmask of frontbuffer slots
5129 * This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them
5130 * from @old and setting them in @new. Both @old and @new can be NULL.
5132 void i915_gem_track_fb(struct drm_i915_gem_object *old,
5133 struct drm_i915_gem_object *new,
5134 unsigned frontbuffer_bits)
5137 WARN_ON(!mutex_is_locked(&old->base.dev->struct_mutex));
5138 WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits));
5139 old->frontbuffer_bits &= ~frontbuffer_bits;
5143 WARN_ON(!mutex_is_locked(&new->base.dev->struct_mutex));
5144 WARN_ON(new->frontbuffer_bits & frontbuffer_bits);
5145 new->frontbuffer_bits |= frontbuffer_bits;
5149 /* All the new VM stuff */
5151 i915_gem_obj_offset(struct drm_i915_gem_object *o,
5152 struct i915_address_space *vm)
5154 struct drm_i915_private *dev_priv = o->base.dev->dev_private;
5155 struct i915_vma *vma;
5157 WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base);
5159 list_for_each_entry(vma, &o->vma_list, vma_link) {
5160 if (i915_is_ggtt(vma->vm) &&
5161 vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL)
5164 return vma->node.start;
5167 WARN(1, "%s vma for this object not found.\n",
5168 i915_is_ggtt(vm) ? "global" : "ppgtt");
5173 i915_gem_obj_ggtt_offset_view(struct drm_i915_gem_object *o,
5174 const struct i915_ggtt_view *view)
5176 struct i915_address_space *ggtt = i915_obj_to_ggtt(o);
5177 struct i915_vma *vma;
5179 list_for_each_entry(vma, &o->vma_list, vma_link)
5180 if (vma->vm == ggtt &&
5181 i915_ggtt_view_equal(&vma->ggtt_view, view))
5182 return vma->node.start;
5184 WARN(1, "global vma for this object not found.\n");
5188 bool i915_gem_obj_bound(struct drm_i915_gem_object *o,
5189 struct i915_address_space *vm)
5191 struct i915_vma *vma;
5193 list_for_each_entry(vma, &o->vma_list, vma_link) {
5194 if (i915_is_ggtt(vma->vm) &&
5195 vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL)
5197 if (vma->vm == vm && drm_mm_node_allocated(&vma->node))
5204 bool i915_gem_obj_ggtt_bound_view(struct drm_i915_gem_object *o,
5205 const struct i915_ggtt_view *view)
5207 struct i915_address_space *ggtt = i915_obj_to_ggtt(o);
5208 struct i915_vma *vma;
5210 list_for_each_entry(vma, &o->vma_list, vma_link)
5211 if (vma->vm == ggtt &&
5212 i915_ggtt_view_equal(&vma->ggtt_view, view) &&
5213 drm_mm_node_allocated(&vma->node))
5219 bool i915_gem_obj_bound_any(struct drm_i915_gem_object *o)
5221 struct i915_vma *vma;
5223 list_for_each_entry(vma, &o->vma_list, vma_link)
5224 if (drm_mm_node_allocated(&vma->node))
5230 unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o,
5231 struct i915_address_space *vm)
5233 struct drm_i915_private *dev_priv = o->base.dev->dev_private;
5234 struct i915_vma *vma;
5236 WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base);
5238 BUG_ON(list_empty(&o->vma_list));
5240 list_for_each_entry(vma, &o->vma_list, vma_link) {
5241 if (i915_is_ggtt(vma->vm) &&
5242 vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL)
5245 return vma->node.size;
5250 bool i915_gem_obj_is_pinned(struct drm_i915_gem_object *obj)
5252 struct i915_vma *vma;
5253 list_for_each_entry(vma, &obj->vma_list, vma_link) {
5254 if (i915_is_ggtt(vma->vm) &&
5255 vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL)
5257 if (vma->pin_count > 0)