2 * Copyright © 2008 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eric Anholt <eric@anholt.net>
29 #include <drm/drm_vma_manager.h>
30 #include <drm/i915_drm.h>
32 #include "i915_trace.h"
33 #include "intel_drv.h"
34 #include <linux/oom.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,
44 static __must_check int
45 i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj,
48 i915_gem_object_retire(struct drm_i915_gem_object *obj);
50 static void i915_gem_write_fence(struct drm_device *dev, int reg,
51 struct drm_i915_gem_object *obj);
52 static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj,
53 struct drm_i915_fence_reg *fence,
56 static unsigned long i915_gem_shrinker_count(struct shrinker *shrinker,
57 struct shrink_control *sc);
58 static unsigned long i915_gem_shrinker_scan(struct shrinker *shrinker,
59 struct shrink_control *sc);
60 static int i915_gem_shrinker_oom(struct notifier_block *nb,
63 static unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv);
65 static bool cpu_cache_is_coherent(struct drm_device *dev,
66 enum i915_cache_level level)
68 return HAS_LLC(dev) || level != I915_CACHE_NONE;
71 static bool cpu_write_needs_clflush(struct drm_i915_gem_object *obj)
73 if (!cpu_cache_is_coherent(obj->base.dev, obj->cache_level))
76 return obj->pin_display;
79 static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj)
82 i915_gem_release_mmap(obj);
84 /* As we do not have an associated fence register, we will force
85 * a tiling change if we ever need to acquire one.
87 obj->fence_dirty = false;
88 obj->fence_reg = I915_FENCE_REG_NONE;
91 /* some bookkeeping */
92 static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv,
95 spin_lock(&dev_priv->mm.object_stat_lock);
96 dev_priv->mm.object_count++;
97 dev_priv->mm.object_memory += size;
98 spin_unlock(&dev_priv->mm.object_stat_lock);
101 static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv,
104 spin_lock(&dev_priv->mm.object_stat_lock);
105 dev_priv->mm.object_count--;
106 dev_priv->mm.object_memory -= size;
107 spin_unlock(&dev_priv->mm.object_stat_lock);
111 i915_gem_wait_for_error(struct i915_gpu_error *error)
115 #define EXIT_COND (!i915_reset_in_progress(error) || \
116 i915_terminally_wedged(error))
121 * Only wait 10 seconds for the gpu reset to complete to avoid hanging
122 * userspace. If it takes that long something really bad is going on and
123 * we should simply try to bail out and fail as gracefully as possible.
125 ret = wait_event_interruptible_timeout(error->reset_queue,
129 DRM_ERROR("Timed out waiting for the gpu reset to complete\n");
131 } else if (ret < 0) {
139 int i915_mutex_lock_interruptible(struct drm_device *dev)
141 struct drm_i915_private *dev_priv = dev->dev_private;
144 ret = i915_gem_wait_for_error(&dev_priv->gpu_error);
148 ret = mutex_lock_interruptible(&dev->struct_mutex);
152 WARN_ON(i915_verify_lists(dev));
157 i915_gem_object_is_inactive(struct drm_i915_gem_object *obj)
159 return i915_gem_obj_bound_any(obj) && !obj->active;
163 i915_gem_init_ioctl(struct drm_device *dev, void *data,
164 struct drm_file *file)
166 struct drm_i915_private *dev_priv = dev->dev_private;
167 struct drm_i915_gem_init *args = data;
169 if (drm_core_check_feature(dev, DRIVER_MODESET))
172 if (args->gtt_start >= args->gtt_end ||
173 (args->gtt_end | args->gtt_start) & (PAGE_SIZE - 1))
176 /* GEM with user mode setting was never supported on ilk and later. */
177 if (INTEL_INFO(dev)->gen >= 5)
180 mutex_lock(&dev->struct_mutex);
181 i915_gem_setup_global_gtt(dev, args->gtt_start, args->gtt_end,
183 dev_priv->gtt.mappable_end = args->gtt_end;
184 mutex_unlock(&dev->struct_mutex);
190 i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
191 struct drm_file *file)
193 struct drm_i915_private *dev_priv = dev->dev_private;
194 struct drm_i915_gem_get_aperture *args = data;
195 struct drm_i915_gem_object *obj;
199 mutex_lock(&dev->struct_mutex);
200 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
201 if (i915_gem_obj_is_pinned(obj))
202 pinned += i915_gem_obj_ggtt_size(obj);
203 mutex_unlock(&dev->struct_mutex);
205 args->aper_size = dev_priv->gtt.base.total;
206 args->aper_available_size = args->aper_size - pinned;
212 i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj)
214 struct address_space *mapping = file_inode(obj->base.filp)->i_mapping;
215 char *vaddr = obj->phys_handle->vaddr;
217 struct scatterlist *sg;
220 if (WARN_ON(i915_gem_object_needs_bit17_swizzle(obj)))
223 for (i = 0; i < obj->base.size / PAGE_SIZE; i++) {
227 page = shmem_read_mapping_page(mapping, i);
229 return PTR_ERR(page);
231 src = kmap_atomic(page);
232 memcpy(vaddr, src, PAGE_SIZE);
233 drm_clflush_virt_range(vaddr, PAGE_SIZE);
236 page_cache_release(page);
240 i915_gem_chipset_flush(obj->base.dev);
242 st = kmalloc(sizeof(*st), GFP_KERNEL);
246 if (sg_alloc_table(st, 1, GFP_KERNEL)) {
253 sg->length = obj->base.size;
255 sg_dma_address(sg) = obj->phys_handle->busaddr;
256 sg_dma_len(sg) = obj->base.size;
259 obj->has_dma_mapping = true;
264 i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj)
268 BUG_ON(obj->madv == __I915_MADV_PURGED);
270 ret = i915_gem_object_set_to_cpu_domain(obj, true);
272 /* In the event of a disaster, abandon all caches and
275 WARN_ON(ret != -EIO);
276 obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU;
279 if (obj->madv == I915_MADV_DONTNEED)
283 struct address_space *mapping = file_inode(obj->base.filp)->i_mapping;
284 char *vaddr = obj->phys_handle->vaddr;
287 for (i = 0; i < obj->base.size / PAGE_SIZE; i++) {
291 page = shmem_read_mapping_page(mapping, i);
295 dst = kmap_atomic(page);
296 drm_clflush_virt_range(vaddr, PAGE_SIZE);
297 memcpy(dst, vaddr, PAGE_SIZE);
300 set_page_dirty(page);
301 if (obj->madv == I915_MADV_WILLNEED)
302 mark_page_accessed(page);
303 page_cache_release(page);
309 sg_free_table(obj->pages);
312 obj->has_dma_mapping = false;
316 i915_gem_object_release_phys(struct drm_i915_gem_object *obj)
318 drm_pci_free(obj->base.dev, obj->phys_handle);
321 static const struct drm_i915_gem_object_ops i915_gem_phys_ops = {
322 .get_pages = i915_gem_object_get_pages_phys,
323 .put_pages = i915_gem_object_put_pages_phys,
324 .release = i915_gem_object_release_phys,
328 drop_pages(struct drm_i915_gem_object *obj)
330 struct i915_vma *vma, *next;
333 drm_gem_object_reference(&obj->base);
334 list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link)
335 if (i915_vma_unbind(vma))
338 ret = i915_gem_object_put_pages(obj);
339 drm_gem_object_unreference(&obj->base);
345 i915_gem_object_attach_phys(struct drm_i915_gem_object *obj,
348 drm_dma_handle_t *phys;
351 if (obj->phys_handle) {
352 if ((unsigned long)obj->phys_handle->vaddr & (align -1))
358 if (obj->madv != I915_MADV_WILLNEED)
361 if (obj->base.filp == NULL)
364 ret = drop_pages(obj);
368 /* create a new object */
369 phys = drm_pci_alloc(obj->base.dev, obj->base.size, align);
373 obj->phys_handle = phys;
374 obj->ops = &i915_gem_phys_ops;
376 return i915_gem_object_get_pages(obj);
380 i915_gem_phys_pwrite(struct drm_i915_gem_object *obj,
381 struct drm_i915_gem_pwrite *args,
382 struct drm_file *file_priv)
384 struct drm_device *dev = obj->base.dev;
385 void *vaddr = obj->phys_handle->vaddr + args->offset;
386 char __user *user_data = to_user_ptr(args->data_ptr);
389 /* We manually control the domain here and pretend that it
390 * remains coherent i.e. in the GTT domain, like shmem_pwrite.
392 ret = i915_gem_object_wait_rendering(obj, false);
396 if (__copy_from_user_inatomic_nocache(vaddr, user_data, args->size)) {
397 unsigned long unwritten;
399 /* The physical object once assigned is fixed for the lifetime
400 * of the obj, so we can safely drop the lock and continue
403 mutex_unlock(&dev->struct_mutex);
404 unwritten = copy_from_user(vaddr, user_data, args->size);
405 mutex_lock(&dev->struct_mutex);
410 drm_clflush_virt_range(vaddr, args->size);
411 i915_gem_chipset_flush(dev);
415 void *i915_gem_object_alloc(struct drm_device *dev)
417 struct drm_i915_private *dev_priv = dev->dev_private;
418 return kmem_cache_zalloc(dev_priv->slab, GFP_KERNEL);
421 void i915_gem_object_free(struct drm_i915_gem_object *obj)
423 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
424 kmem_cache_free(dev_priv->slab, obj);
428 i915_gem_create(struct drm_file *file,
429 struct drm_device *dev,
433 struct drm_i915_gem_object *obj;
437 size = roundup(size, PAGE_SIZE);
441 /* Allocate the new object */
442 obj = i915_gem_alloc_object(dev, size);
446 ret = drm_gem_handle_create(file, &obj->base, &handle);
447 /* drop reference from allocate - handle holds it now */
448 drm_gem_object_unreference_unlocked(&obj->base);
457 i915_gem_dumb_create(struct drm_file *file,
458 struct drm_device *dev,
459 struct drm_mode_create_dumb *args)
461 /* have to work out size/pitch and return them */
462 args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 64);
463 args->size = args->pitch * args->height;
464 return i915_gem_create(file, dev,
465 args->size, &args->handle);
469 * Creates a new mm object and returns a handle to it.
472 i915_gem_create_ioctl(struct drm_device *dev, void *data,
473 struct drm_file *file)
475 struct drm_i915_gem_create *args = data;
477 return i915_gem_create(file, dev,
478 args->size, &args->handle);
482 __copy_to_user_swizzled(char __user *cpu_vaddr,
483 const char *gpu_vaddr, int gpu_offset,
486 int ret, cpu_offset = 0;
489 int cacheline_end = ALIGN(gpu_offset + 1, 64);
490 int this_length = min(cacheline_end - gpu_offset, length);
491 int swizzled_gpu_offset = gpu_offset ^ 64;
493 ret = __copy_to_user(cpu_vaddr + cpu_offset,
494 gpu_vaddr + swizzled_gpu_offset,
499 cpu_offset += this_length;
500 gpu_offset += this_length;
501 length -= this_length;
508 __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset,
509 const char __user *cpu_vaddr,
512 int ret, cpu_offset = 0;
515 int cacheline_end = ALIGN(gpu_offset + 1, 64);
516 int this_length = min(cacheline_end - gpu_offset, length);
517 int swizzled_gpu_offset = gpu_offset ^ 64;
519 ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset,
520 cpu_vaddr + cpu_offset,
525 cpu_offset += this_length;
526 gpu_offset += this_length;
527 length -= this_length;
534 * Pins the specified object's pages and synchronizes the object with
535 * GPU accesses. Sets needs_clflush to non-zero if the caller should
536 * flush the object from the CPU cache.
538 int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj,
548 if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) {
549 /* If we're not in the cpu read domain, set ourself into the gtt
550 * read domain and manually flush cachelines (if required). This
551 * optimizes for the case when the gpu will dirty the data
552 * anyway again before the next pread happens. */
553 *needs_clflush = !cpu_cache_is_coherent(obj->base.dev,
555 ret = i915_gem_object_wait_rendering(obj, true);
559 i915_gem_object_retire(obj);
562 ret = i915_gem_object_get_pages(obj);
566 i915_gem_object_pin_pages(obj);
571 /* Per-page copy function for the shmem pread fastpath.
572 * Flushes invalid cachelines before reading the target if
573 * needs_clflush is set. */
575 shmem_pread_fast(struct page *page, int shmem_page_offset, int page_length,
576 char __user *user_data,
577 bool page_do_bit17_swizzling, bool needs_clflush)
582 if (unlikely(page_do_bit17_swizzling))
585 vaddr = kmap_atomic(page);
587 drm_clflush_virt_range(vaddr + shmem_page_offset,
589 ret = __copy_to_user_inatomic(user_data,
590 vaddr + shmem_page_offset,
592 kunmap_atomic(vaddr);
594 return ret ? -EFAULT : 0;
598 shmem_clflush_swizzled_range(char *addr, unsigned long length,
601 if (unlikely(swizzled)) {
602 unsigned long start = (unsigned long) addr;
603 unsigned long end = (unsigned long) addr + length;
605 /* For swizzling simply ensure that we always flush both
606 * channels. Lame, but simple and it works. Swizzled
607 * pwrite/pread is far from a hotpath - current userspace
608 * doesn't use it at all. */
609 start = round_down(start, 128);
610 end = round_up(end, 128);
612 drm_clflush_virt_range((void *)start, end - start);
614 drm_clflush_virt_range(addr, length);
619 /* Only difference to the fast-path function is that this can handle bit17
620 * and uses non-atomic copy and kmap functions. */
622 shmem_pread_slow(struct page *page, int shmem_page_offset, int page_length,
623 char __user *user_data,
624 bool page_do_bit17_swizzling, bool needs_clflush)
631 shmem_clflush_swizzled_range(vaddr + shmem_page_offset,
633 page_do_bit17_swizzling);
635 if (page_do_bit17_swizzling)
636 ret = __copy_to_user_swizzled(user_data,
637 vaddr, shmem_page_offset,
640 ret = __copy_to_user(user_data,
641 vaddr + shmem_page_offset,
645 return ret ? - EFAULT : 0;
649 i915_gem_shmem_pread(struct drm_device *dev,
650 struct drm_i915_gem_object *obj,
651 struct drm_i915_gem_pread *args,
652 struct drm_file *file)
654 char __user *user_data;
657 int shmem_page_offset, page_length, ret = 0;
658 int obj_do_bit17_swizzling, page_do_bit17_swizzling;
660 int needs_clflush = 0;
661 struct sg_page_iter sg_iter;
663 user_data = to_user_ptr(args->data_ptr);
666 obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
668 ret = i915_gem_obj_prepare_shmem_read(obj, &needs_clflush);
672 offset = args->offset;
674 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents,
675 offset >> PAGE_SHIFT) {
676 struct page *page = sg_page_iter_page(&sg_iter);
681 /* Operation in this page
683 * shmem_page_offset = offset within page in shmem file
684 * page_length = bytes to copy for this page
686 shmem_page_offset = offset_in_page(offset);
687 page_length = remain;
688 if ((shmem_page_offset + page_length) > PAGE_SIZE)
689 page_length = PAGE_SIZE - shmem_page_offset;
691 page_do_bit17_swizzling = obj_do_bit17_swizzling &&
692 (page_to_phys(page) & (1 << 17)) != 0;
694 ret = shmem_pread_fast(page, shmem_page_offset, page_length,
695 user_data, page_do_bit17_swizzling,
700 mutex_unlock(&dev->struct_mutex);
702 if (likely(!i915.prefault_disable) && !prefaulted) {
703 ret = fault_in_multipages_writeable(user_data, remain);
704 /* Userspace is tricking us, but we've already clobbered
705 * its pages with the prefault and promised to write the
706 * data up to the first fault. Hence ignore any errors
707 * and just continue. */
712 ret = shmem_pread_slow(page, shmem_page_offset, page_length,
713 user_data, page_do_bit17_swizzling,
716 mutex_lock(&dev->struct_mutex);
722 remain -= page_length;
723 user_data += page_length;
724 offset += page_length;
728 i915_gem_object_unpin_pages(obj);
734 * Reads data from the object referenced by handle.
736 * On error, the contents of *data are undefined.
739 i915_gem_pread_ioctl(struct drm_device *dev, void *data,
740 struct drm_file *file)
742 struct drm_i915_gem_pread *args = data;
743 struct drm_i915_gem_object *obj;
749 if (!access_ok(VERIFY_WRITE,
750 to_user_ptr(args->data_ptr),
754 ret = i915_mutex_lock_interruptible(dev);
758 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
759 if (&obj->base == NULL) {
764 /* Bounds check source. */
765 if (args->offset > obj->base.size ||
766 args->size > obj->base.size - args->offset) {
771 /* prime objects have no backing filp to GEM pread/pwrite
774 if (!obj->base.filp) {
779 trace_i915_gem_object_pread(obj, args->offset, args->size);
781 ret = i915_gem_shmem_pread(dev, obj, args, file);
784 drm_gem_object_unreference(&obj->base);
786 mutex_unlock(&dev->struct_mutex);
790 /* This is the fast write path which cannot handle
791 * page faults in the source data
795 fast_user_write(struct io_mapping *mapping,
796 loff_t page_base, int page_offset,
797 char __user *user_data,
800 void __iomem *vaddr_atomic;
802 unsigned long unwritten;
804 vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base);
805 /* We can use the cpu mem copy function because this is X86. */
806 vaddr = (void __force*)vaddr_atomic + page_offset;
807 unwritten = __copy_from_user_inatomic_nocache(vaddr,
809 io_mapping_unmap_atomic(vaddr_atomic);
814 * This is the fast pwrite path, where we copy the data directly from the
815 * user into the GTT, uncached.
818 i915_gem_gtt_pwrite_fast(struct drm_device *dev,
819 struct drm_i915_gem_object *obj,
820 struct drm_i915_gem_pwrite *args,
821 struct drm_file *file)
823 struct drm_i915_private *dev_priv = dev->dev_private;
825 loff_t offset, page_base;
826 char __user *user_data;
827 int page_offset, page_length, ret;
829 ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE | PIN_NONBLOCK);
833 ret = i915_gem_object_set_to_gtt_domain(obj, true);
837 ret = i915_gem_object_put_fence(obj);
841 user_data = to_user_ptr(args->data_ptr);
844 offset = i915_gem_obj_ggtt_offset(obj) + args->offset;
847 /* Operation in this page
849 * page_base = page offset within aperture
850 * page_offset = offset within page
851 * page_length = bytes to copy for this page
853 page_base = offset & PAGE_MASK;
854 page_offset = offset_in_page(offset);
855 page_length = remain;
856 if ((page_offset + remain) > PAGE_SIZE)
857 page_length = PAGE_SIZE - page_offset;
859 /* If we get a fault while copying data, then (presumably) our
860 * source page isn't available. Return the error and we'll
861 * retry in the slow path.
863 if (fast_user_write(dev_priv->gtt.mappable, page_base,
864 page_offset, user_data, page_length)) {
869 remain -= page_length;
870 user_data += page_length;
871 offset += page_length;
875 i915_gem_object_ggtt_unpin(obj);
880 /* Per-page copy function for the shmem pwrite fastpath.
881 * Flushes invalid cachelines before writing to the target if
882 * needs_clflush_before is set and flushes out any written cachelines after
883 * writing if needs_clflush is set. */
885 shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length,
886 char __user *user_data,
887 bool page_do_bit17_swizzling,
888 bool needs_clflush_before,
889 bool needs_clflush_after)
894 if (unlikely(page_do_bit17_swizzling))
897 vaddr = kmap_atomic(page);
898 if (needs_clflush_before)
899 drm_clflush_virt_range(vaddr + shmem_page_offset,
901 ret = __copy_from_user_inatomic(vaddr + shmem_page_offset,
902 user_data, page_length);
903 if (needs_clflush_after)
904 drm_clflush_virt_range(vaddr + shmem_page_offset,
906 kunmap_atomic(vaddr);
908 return ret ? -EFAULT : 0;
911 /* Only difference to the fast-path function is that this can handle bit17
912 * and uses non-atomic copy and kmap functions. */
914 shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length,
915 char __user *user_data,
916 bool page_do_bit17_swizzling,
917 bool needs_clflush_before,
918 bool needs_clflush_after)
924 if (unlikely(needs_clflush_before || page_do_bit17_swizzling))
925 shmem_clflush_swizzled_range(vaddr + shmem_page_offset,
927 page_do_bit17_swizzling);
928 if (page_do_bit17_swizzling)
929 ret = __copy_from_user_swizzled(vaddr, shmem_page_offset,
933 ret = __copy_from_user(vaddr + shmem_page_offset,
936 if (needs_clflush_after)
937 shmem_clflush_swizzled_range(vaddr + shmem_page_offset,
939 page_do_bit17_swizzling);
942 return ret ? -EFAULT : 0;
946 i915_gem_shmem_pwrite(struct drm_device *dev,
947 struct drm_i915_gem_object *obj,
948 struct drm_i915_gem_pwrite *args,
949 struct drm_file *file)
953 char __user *user_data;
954 int shmem_page_offset, page_length, ret = 0;
955 int obj_do_bit17_swizzling, page_do_bit17_swizzling;
956 int hit_slowpath = 0;
957 int needs_clflush_after = 0;
958 int needs_clflush_before = 0;
959 struct sg_page_iter sg_iter;
961 user_data = to_user_ptr(args->data_ptr);
964 obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
966 if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
967 /* If we're not in the cpu write domain, set ourself into the gtt
968 * write domain and manually flush cachelines (if required). This
969 * optimizes for the case when the gpu will use the data
970 * right away and we therefore have to clflush anyway. */
971 needs_clflush_after = cpu_write_needs_clflush(obj);
972 ret = i915_gem_object_wait_rendering(obj, false);
976 i915_gem_object_retire(obj);
978 /* Same trick applies to invalidate partially written cachelines read
980 if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0)
981 needs_clflush_before =
982 !cpu_cache_is_coherent(dev, obj->cache_level);
984 ret = i915_gem_object_get_pages(obj);
988 i915_gem_object_pin_pages(obj);
990 offset = args->offset;
993 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents,
994 offset >> PAGE_SHIFT) {
995 struct page *page = sg_page_iter_page(&sg_iter);
996 int partial_cacheline_write;
1001 /* Operation in this page
1003 * shmem_page_offset = offset within page in shmem file
1004 * page_length = bytes to copy for this page
1006 shmem_page_offset = offset_in_page(offset);
1008 page_length = remain;
1009 if ((shmem_page_offset + page_length) > PAGE_SIZE)
1010 page_length = PAGE_SIZE - shmem_page_offset;
1012 /* If we don't overwrite a cacheline completely we need to be
1013 * careful to have up-to-date data by first clflushing. Don't
1014 * overcomplicate things and flush the entire patch. */
1015 partial_cacheline_write = needs_clflush_before &&
1016 ((shmem_page_offset | page_length)
1017 & (boot_cpu_data.x86_clflush_size - 1));
1019 page_do_bit17_swizzling = obj_do_bit17_swizzling &&
1020 (page_to_phys(page) & (1 << 17)) != 0;
1022 ret = shmem_pwrite_fast(page, shmem_page_offset, page_length,
1023 user_data, page_do_bit17_swizzling,
1024 partial_cacheline_write,
1025 needs_clflush_after);
1030 mutex_unlock(&dev->struct_mutex);
1031 ret = shmem_pwrite_slow(page, shmem_page_offset, page_length,
1032 user_data, page_do_bit17_swizzling,
1033 partial_cacheline_write,
1034 needs_clflush_after);
1036 mutex_lock(&dev->struct_mutex);
1042 remain -= page_length;
1043 user_data += page_length;
1044 offset += page_length;
1048 i915_gem_object_unpin_pages(obj);
1052 * Fixup: Flush cpu caches in case we didn't flush the dirty
1053 * cachelines in-line while writing and the object moved
1054 * out of the cpu write domain while we've dropped the lock.
1056 if (!needs_clflush_after &&
1057 obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
1058 if (i915_gem_clflush_object(obj, obj->pin_display))
1059 i915_gem_chipset_flush(dev);
1063 if (needs_clflush_after)
1064 i915_gem_chipset_flush(dev);
1070 * Writes data to the object referenced by handle.
1072 * On error, the contents of the buffer that were to be modified are undefined.
1075 i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
1076 struct drm_file *file)
1078 struct drm_i915_gem_pwrite *args = data;
1079 struct drm_i915_gem_object *obj;
1082 if (args->size == 0)
1085 if (!access_ok(VERIFY_READ,
1086 to_user_ptr(args->data_ptr),
1090 if (likely(!i915.prefault_disable)) {
1091 ret = fault_in_multipages_readable(to_user_ptr(args->data_ptr),
1097 ret = i915_mutex_lock_interruptible(dev);
1101 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
1102 if (&obj->base == NULL) {
1107 /* Bounds check destination. */
1108 if (args->offset > obj->base.size ||
1109 args->size > obj->base.size - args->offset) {
1114 /* prime objects have no backing filp to GEM pread/pwrite
1117 if (!obj->base.filp) {
1122 trace_i915_gem_object_pwrite(obj, args->offset, args->size);
1125 /* We can only do the GTT pwrite on untiled buffers, as otherwise
1126 * it would end up going through the fenced access, and we'll get
1127 * different detiling behavior between reading and writing.
1128 * pread/pwrite currently are reading and writing from the CPU
1129 * perspective, requiring manual detiling by the client.
1131 if (obj->tiling_mode == I915_TILING_NONE &&
1132 obj->base.write_domain != I915_GEM_DOMAIN_CPU &&
1133 cpu_write_needs_clflush(obj)) {
1134 ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file);
1135 /* Note that the gtt paths might fail with non-page-backed user
1136 * pointers (e.g. gtt mappings when moving data between
1137 * textures). Fallback to the shmem path in that case. */
1140 if (ret == -EFAULT || ret == -ENOSPC) {
1141 if (obj->phys_handle)
1142 ret = i915_gem_phys_pwrite(obj, args, file);
1144 ret = i915_gem_shmem_pwrite(dev, obj, args, file);
1148 drm_gem_object_unreference(&obj->base);
1150 mutex_unlock(&dev->struct_mutex);
1155 i915_gem_check_wedge(struct i915_gpu_error *error,
1158 if (i915_reset_in_progress(error)) {
1159 /* Non-interruptible callers can't handle -EAGAIN, hence return
1160 * -EIO unconditionally for these. */
1164 /* Recovery complete, but the reset failed ... */
1165 if (i915_terminally_wedged(error))
1169 * Check if GPU Reset is in progress - we need intel_ring_begin
1170 * to work properly to reinit the hw state while the gpu is
1171 * still marked as reset-in-progress. Handle this with a flag.
1173 if (!error->reload_in_reset)
1181 * Compare seqno against outstanding lazy request. Emit a request if they are
1185 i915_gem_check_olr(struct intel_engine_cs *ring, u32 seqno)
1189 BUG_ON(!mutex_is_locked(&ring->dev->struct_mutex));
1192 if (seqno == ring->outstanding_lazy_seqno)
1193 ret = i915_add_request(ring, NULL);
1198 static void fake_irq(unsigned long data)
1200 wake_up_process((struct task_struct *)data);
1203 static bool missed_irq(struct drm_i915_private *dev_priv,
1204 struct intel_engine_cs *ring)
1206 return test_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings);
1209 static bool can_wait_boost(struct drm_i915_file_private *file_priv)
1211 if (file_priv == NULL)
1214 return !atomic_xchg(&file_priv->rps_wait_boost, true);
1218 * __i915_wait_seqno - wait until execution of seqno has finished
1219 * @ring: the ring expected to report seqno
1221 * @reset_counter: reset sequence associated with the given seqno
1222 * @interruptible: do an interruptible wait (normally yes)
1223 * @timeout: in - how long to wait (NULL forever); out - how much time remaining
1225 * Note: It is of utmost importance that the passed in seqno and reset_counter
1226 * values have been read by the caller in an smp safe manner. Where read-side
1227 * locks are involved, it is sufficient to read the reset_counter before
1228 * unlocking the lock that protects the seqno. For lockless tricks, the
1229 * reset_counter _must_ be read before, and an appropriate smp_rmb must be
1232 * Returns 0 if the seqno was found within the alloted time. Else returns the
1233 * errno with remaining time filled in timeout argument.
1235 int __i915_wait_seqno(struct intel_engine_cs *ring, u32 seqno,
1236 unsigned reset_counter,
1239 struct drm_i915_file_private *file_priv)
1241 struct drm_device *dev = ring->dev;
1242 struct drm_i915_private *dev_priv = dev->dev_private;
1243 const bool irq_test_in_progress =
1244 ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_ring_flag(ring);
1246 unsigned long timeout_expire;
1250 WARN(!intel_irqs_enabled(dev_priv), "IRQs disabled");
1252 if (i915_seqno_passed(ring->get_seqno(ring, true), seqno))
1255 timeout_expire = timeout ? jiffies + nsecs_to_jiffies((u64)*timeout) : 0;
1257 if (INTEL_INFO(dev)->gen >= 6 && ring->id == RCS && can_wait_boost(file_priv)) {
1258 gen6_rps_boost(dev_priv);
1260 mod_delayed_work(dev_priv->wq,
1261 &file_priv->mm.idle_work,
1262 msecs_to_jiffies(100));
1265 if (!irq_test_in_progress && WARN_ON(!ring->irq_get(ring)))
1268 /* Record current time in case interrupted by signal, or wedged */
1269 trace_i915_gem_request_wait_begin(ring, seqno);
1270 before = ktime_get_raw_ns();
1272 struct timer_list timer;
1274 prepare_to_wait(&ring->irq_queue, &wait,
1275 interruptible ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
1277 /* We need to check whether any gpu reset happened in between
1278 * the caller grabbing the seqno and now ... */
1279 if (reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter)) {
1280 /* ... but upgrade the -EAGAIN to an -EIO if the gpu
1281 * is truely gone. */
1282 ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible);
1288 if (i915_seqno_passed(ring->get_seqno(ring, false), seqno)) {
1293 if (interruptible && signal_pending(current)) {
1298 if (timeout && time_after_eq(jiffies, timeout_expire)) {
1303 timer.function = NULL;
1304 if (timeout || missed_irq(dev_priv, ring)) {
1305 unsigned long expire;
1307 setup_timer_on_stack(&timer, fake_irq, (unsigned long)current);
1308 expire = missed_irq(dev_priv, ring) ? jiffies + 1 : timeout_expire;
1309 mod_timer(&timer, expire);
1314 if (timer.function) {
1315 del_singleshot_timer_sync(&timer);
1316 destroy_timer_on_stack(&timer);
1319 now = ktime_get_raw_ns();
1320 trace_i915_gem_request_wait_end(ring, seqno);
1322 if (!irq_test_in_progress)
1323 ring->irq_put(ring);
1325 finish_wait(&ring->irq_queue, &wait);
1328 s64 tres = *timeout - (now - before);
1330 *timeout = tres < 0 ? 0 : tres;
1337 * Waits for a sequence number to be signaled, and cleans up the
1338 * request and object lists appropriately for that event.
1341 i915_wait_seqno(struct intel_engine_cs *ring, uint32_t seqno)
1343 struct drm_device *dev = ring->dev;
1344 struct drm_i915_private *dev_priv = dev->dev_private;
1345 bool interruptible = dev_priv->mm.interruptible;
1346 unsigned reset_counter;
1349 BUG_ON(!mutex_is_locked(&dev->struct_mutex));
1352 ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible);
1356 ret = i915_gem_check_olr(ring, seqno);
1360 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
1361 return __i915_wait_seqno(ring, seqno, reset_counter, interruptible,
1366 i915_gem_object_wait_rendering__tail(struct drm_i915_gem_object *obj)
1371 /* Manually manage the write flush as we may have not yet
1372 * retired the buffer.
1374 * Note that the last_write_seqno is always the earlier of
1375 * the two (read/write) seqno, so if we haved successfully waited,
1376 * we know we have passed the last write.
1378 obj->last_write_seqno = 0;
1384 * Ensures that all rendering to the object has completed and the object is
1385 * safe to unbind from the GTT or access from the CPU.
1387 static __must_check int
1388 i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj,
1391 struct intel_engine_cs *ring = obj->ring;
1395 seqno = readonly ? obj->last_write_seqno : obj->last_read_seqno;
1399 ret = i915_wait_seqno(ring, seqno);
1403 return i915_gem_object_wait_rendering__tail(obj);
1406 /* A nonblocking variant of the above wait. This is a highly dangerous routine
1407 * as the object state may change during this call.
1409 static __must_check int
1410 i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj,
1411 struct drm_i915_file_private *file_priv,
1414 struct drm_device *dev = obj->base.dev;
1415 struct drm_i915_private *dev_priv = dev->dev_private;
1416 struct intel_engine_cs *ring = obj->ring;
1417 unsigned reset_counter;
1421 BUG_ON(!mutex_is_locked(&dev->struct_mutex));
1422 BUG_ON(!dev_priv->mm.interruptible);
1424 seqno = readonly ? obj->last_write_seqno : obj->last_read_seqno;
1428 ret = i915_gem_check_wedge(&dev_priv->gpu_error, true);
1432 ret = i915_gem_check_olr(ring, seqno);
1436 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
1437 mutex_unlock(&dev->struct_mutex);
1438 ret = __i915_wait_seqno(ring, seqno, reset_counter, true, NULL,
1440 mutex_lock(&dev->struct_mutex);
1444 return i915_gem_object_wait_rendering__tail(obj);
1448 * Called when user space prepares to use an object with the CPU, either
1449 * through the mmap ioctl's mapping or a GTT mapping.
1452 i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
1453 struct drm_file *file)
1455 struct drm_i915_gem_set_domain *args = data;
1456 struct drm_i915_gem_object *obj;
1457 uint32_t read_domains = args->read_domains;
1458 uint32_t write_domain = args->write_domain;
1461 /* Only handle setting domains to types used by the CPU. */
1462 if (write_domain & I915_GEM_GPU_DOMAINS)
1465 if (read_domains & I915_GEM_GPU_DOMAINS)
1468 /* Having something in the write domain implies it's in the read
1469 * domain, and only that read domain. Enforce that in the request.
1471 if (write_domain != 0 && read_domains != write_domain)
1474 ret = i915_mutex_lock_interruptible(dev);
1478 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
1479 if (&obj->base == NULL) {
1484 /* Try to flush the object off the GPU without holding the lock.
1485 * We will repeat the flush holding the lock in the normal manner
1486 * to catch cases where we are gazumped.
1488 ret = i915_gem_object_wait_rendering__nonblocking(obj,
1494 if (read_domains & I915_GEM_DOMAIN_GTT) {
1495 ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0);
1497 /* Silently promote "you're not bound, there was nothing to do"
1498 * to success, since the client was just asking us to
1499 * make sure everything was done.
1504 ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0);
1508 drm_gem_object_unreference(&obj->base);
1510 mutex_unlock(&dev->struct_mutex);
1515 * Called when user space has done writes to this buffer
1518 i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
1519 struct drm_file *file)
1521 struct drm_i915_gem_sw_finish *args = data;
1522 struct drm_i915_gem_object *obj;
1525 ret = i915_mutex_lock_interruptible(dev);
1529 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
1530 if (&obj->base == NULL) {
1535 /* Pinned buffers may be scanout, so flush the cache */
1536 if (obj->pin_display)
1537 i915_gem_object_flush_cpu_write_domain(obj, true);
1539 drm_gem_object_unreference(&obj->base);
1541 mutex_unlock(&dev->struct_mutex);
1546 * Maps the contents of an object, returning the address it is mapped
1549 * While the mapping holds a reference on the contents of the object, it doesn't
1550 * imply a ref on the object itself.
1554 * DRM driver writers who look a this function as an example for how to do GEM
1555 * mmap support, please don't implement mmap support like here. The modern way
1556 * to implement DRM mmap support is with an mmap offset ioctl (like
1557 * i915_gem_mmap_gtt) and then using the mmap syscall on the DRM fd directly.
1558 * That way debug tooling like valgrind will understand what's going on, hiding
1559 * the mmap call in a driver private ioctl will break that. The i915 driver only
1560 * does cpu mmaps this way because we didn't know better.
1563 i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
1564 struct drm_file *file)
1566 struct drm_i915_gem_mmap *args = data;
1567 struct drm_gem_object *obj;
1570 obj = drm_gem_object_lookup(dev, file, args->handle);
1574 /* prime objects have no backing filp to GEM mmap
1578 drm_gem_object_unreference_unlocked(obj);
1582 addr = vm_mmap(obj->filp, 0, args->size,
1583 PROT_READ | PROT_WRITE, MAP_SHARED,
1585 drm_gem_object_unreference_unlocked(obj);
1586 if (IS_ERR((void *)addr))
1589 args->addr_ptr = (uint64_t) addr;
1595 * i915_gem_fault - fault a page into the GTT
1596 * vma: VMA in question
1599 * The fault handler is set up by drm_gem_mmap() when a object is GTT mapped
1600 * from userspace. The fault handler takes care of binding the object to
1601 * the GTT (if needed), allocating and programming a fence register (again,
1602 * only if needed based on whether the old reg is still valid or the object
1603 * is tiled) and inserting a new PTE into the faulting process.
1605 * Note that the faulting process may involve evicting existing objects
1606 * from the GTT and/or fence registers to make room. So performance may
1607 * suffer if the GTT working set is large or there are few fence registers
1610 int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1612 struct drm_i915_gem_object *obj = to_intel_bo(vma->vm_private_data);
1613 struct drm_device *dev = obj->base.dev;
1614 struct drm_i915_private *dev_priv = dev->dev_private;
1615 pgoff_t page_offset;
1618 bool write = !!(vmf->flags & FAULT_FLAG_WRITE);
1620 intel_runtime_pm_get(dev_priv);
1622 /* We don't use vmf->pgoff since that has the fake offset */
1623 page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >>
1626 ret = i915_mutex_lock_interruptible(dev);
1630 trace_i915_gem_object_fault(obj, page_offset, true, write);
1632 /* Try to flush the object off the GPU first without holding the lock.
1633 * Upon reacquiring the lock, we will perform our sanity checks and then
1634 * repeat the flush holding the lock in the normal manner to catch cases
1635 * where we are gazumped.
1637 ret = i915_gem_object_wait_rendering__nonblocking(obj, NULL, !write);
1641 /* Access to snoopable pages through the GTT is incoherent. */
1642 if (obj->cache_level != I915_CACHE_NONE && !HAS_LLC(dev)) {
1647 /* Now bind it into the GTT if needed */
1648 ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE);
1652 ret = i915_gem_object_set_to_gtt_domain(obj, write);
1656 ret = i915_gem_object_get_fence(obj);
1660 /* Finally, remap it using the new GTT offset */
1661 pfn = dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj);
1664 if (!obj->fault_mappable) {
1665 unsigned long size = min_t(unsigned long,
1666 vma->vm_end - vma->vm_start,
1670 for (i = 0; i < size >> PAGE_SHIFT; i++) {
1671 ret = vm_insert_pfn(vma,
1672 (unsigned long)vma->vm_start + i * PAGE_SIZE,
1678 obj->fault_mappable = true;
1680 ret = vm_insert_pfn(vma,
1681 (unsigned long)vmf->virtual_address,
1684 i915_gem_object_ggtt_unpin(obj);
1686 mutex_unlock(&dev->struct_mutex);
1691 * We eat errors when the gpu is terminally wedged to avoid
1692 * userspace unduly crashing (gl has no provisions for mmaps to
1693 * fail). But any other -EIO isn't ours (e.g. swap in failure)
1694 * and so needs to be reported.
1696 if (!i915_terminally_wedged(&dev_priv->gpu_error)) {
1697 ret = VM_FAULT_SIGBUS;
1702 * EAGAIN means the gpu is hung and we'll wait for the error
1703 * handler to reset everything when re-faulting in
1704 * i915_mutex_lock_interruptible.
1711 * EBUSY is ok: this just means that another thread
1712 * already did the job.
1714 ret = VM_FAULT_NOPAGE;
1721 ret = VM_FAULT_SIGBUS;
1724 WARN_ONCE(ret, "unhandled error in i915_gem_fault: %i\n", ret);
1725 ret = VM_FAULT_SIGBUS;
1729 intel_runtime_pm_put(dev_priv);
1734 * i915_gem_release_mmap - remove physical page mappings
1735 * @obj: obj in question
1737 * Preserve the reservation of the mmapping with the DRM core code, but
1738 * relinquish ownership of the pages back to the system.
1740 * It is vital that we remove the page mapping if we have mapped a tiled
1741 * object through the GTT and then lose the fence register due to
1742 * resource pressure. Similarly if the object has been moved out of the
1743 * aperture, than pages mapped into userspace must be revoked. Removing the
1744 * mapping will then trigger a page fault on the next user access, allowing
1745 * fixup by i915_gem_fault().
1748 i915_gem_release_mmap(struct drm_i915_gem_object *obj)
1750 if (!obj->fault_mappable)
1753 drm_vma_node_unmap(&obj->base.vma_node,
1754 obj->base.dev->anon_inode->i_mapping);
1755 obj->fault_mappable = false;
1759 i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv)
1761 struct drm_i915_gem_object *obj;
1763 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
1764 i915_gem_release_mmap(obj);
1768 i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode)
1772 if (INTEL_INFO(dev)->gen >= 4 ||
1773 tiling_mode == I915_TILING_NONE)
1776 /* Previous chips need a power-of-two fence region when tiling */
1777 if (INTEL_INFO(dev)->gen == 3)
1778 gtt_size = 1024*1024;
1780 gtt_size = 512*1024;
1782 while (gtt_size < size)
1789 * i915_gem_get_gtt_alignment - return required GTT alignment for an object
1790 * @obj: object to check
1792 * Return the required GTT alignment for an object, taking into account
1793 * potential fence register mapping.
1796 i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size,
1797 int tiling_mode, bool fenced)
1800 * Minimum alignment is 4k (GTT page size), but might be greater
1801 * if a fence register is needed for the object.
1803 if (INTEL_INFO(dev)->gen >= 4 || (!fenced && IS_G33(dev)) ||
1804 tiling_mode == I915_TILING_NONE)
1808 * Previous chips need to be aligned to the size of the smallest
1809 * fence register that can contain the object.
1811 return i915_gem_get_gtt_size(dev, size, tiling_mode);
1814 static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj)
1816 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
1819 if (drm_vma_node_has_offset(&obj->base.vma_node))
1822 dev_priv->mm.shrinker_no_lock_stealing = true;
1824 ret = drm_gem_create_mmap_offset(&obj->base);
1828 /* Badly fragmented mmap space? The only way we can recover
1829 * space is by destroying unwanted objects. We can't randomly release
1830 * mmap_offsets as userspace expects them to be persistent for the
1831 * lifetime of the objects. The closest we can is to release the
1832 * offsets on purgeable objects by truncating it and marking it purged,
1833 * which prevents userspace from ever using that object again.
1835 i915_gem_shrink(dev_priv,
1836 obj->base.size >> PAGE_SHIFT,
1838 I915_SHRINK_UNBOUND |
1839 I915_SHRINK_PURGEABLE);
1840 ret = drm_gem_create_mmap_offset(&obj->base);
1844 i915_gem_shrink_all(dev_priv);
1845 ret = drm_gem_create_mmap_offset(&obj->base);
1847 dev_priv->mm.shrinker_no_lock_stealing = false;
1852 static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object *obj)
1854 drm_gem_free_mmap_offset(&obj->base);
1858 i915_gem_mmap_gtt(struct drm_file *file,
1859 struct drm_device *dev,
1863 struct drm_i915_private *dev_priv = dev->dev_private;
1864 struct drm_i915_gem_object *obj;
1867 ret = i915_mutex_lock_interruptible(dev);
1871 obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
1872 if (&obj->base == NULL) {
1877 if (obj->base.size > dev_priv->gtt.mappable_end) {
1882 if (obj->madv != I915_MADV_WILLNEED) {
1883 DRM_DEBUG("Attempting to mmap a purgeable buffer\n");
1888 ret = i915_gem_object_create_mmap_offset(obj);
1892 *offset = drm_vma_node_offset_addr(&obj->base.vma_node);
1895 drm_gem_object_unreference(&obj->base);
1897 mutex_unlock(&dev->struct_mutex);
1902 * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing
1904 * @data: GTT mapping ioctl data
1905 * @file: GEM object info
1907 * Simply returns the fake offset to userspace so it can mmap it.
1908 * The mmap call will end up in drm_gem_mmap(), which will set things
1909 * up so we can get faults in the handler above.
1911 * The fault handler will take care of binding the object into the GTT
1912 * (since it may have been evicted to make room for something), allocating
1913 * a fence register, and mapping the appropriate aperture address into
1917 i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
1918 struct drm_file *file)
1920 struct drm_i915_gem_mmap_gtt *args = data;
1922 return i915_gem_mmap_gtt(file, dev, args->handle, &args->offset);
1926 i915_gem_object_is_purgeable(struct drm_i915_gem_object *obj)
1928 return obj->madv == I915_MADV_DONTNEED;
1931 /* Immediately discard the backing storage */
1933 i915_gem_object_truncate(struct drm_i915_gem_object *obj)
1935 i915_gem_object_free_mmap_offset(obj);
1937 if (obj->base.filp == NULL)
1940 /* Our goal here is to return as much of the memory as
1941 * is possible back to the system as we are called from OOM.
1942 * To do this we must instruct the shmfs to drop all of its
1943 * backing pages, *now*.
1945 shmem_truncate_range(file_inode(obj->base.filp), 0, (loff_t)-1);
1946 obj->madv = __I915_MADV_PURGED;
1949 /* Try to discard unwanted pages */
1951 i915_gem_object_invalidate(struct drm_i915_gem_object *obj)
1953 struct address_space *mapping;
1955 switch (obj->madv) {
1956 case I915_MADV_DONTNEED:
1957 i915_gem_object_truncate(obj);
1958 case __I915_MADV_PURGED:
1962 if (obj->base.filp == NULL)
1965 mapping = file_inode(obj->base.filp)->i_mapping,
1966 invalidate_mapping_pages(mapping, 0, (loff_t)-1);
1970 i915_gem_object_put_pages_gtt(struct drm_i915_gem_object *obj)
1972 struct sg_page_iter sg_iter;
1975 BUG_ON(obj->madv == __I915_MADV_PURGED);
1977 ret = i915_gem_object_set_to_cpu_domain(obj, true);
1979 /* In the event of a disaster, abandon all caches and
1980 * hope for the best.
1982 WARN_ON(ret != -EIO);
1983 i915_gem_clflush_object(obj, true);
1984 obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU;
1987 if (i915_gem_object_needs_bit17_swizzle(obj))
1988 i915_gem_object_save_bit_17_swizzle(obj);
1990 if (obj->madv == I915_MADV_DONTNEED)
1993 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0) {
1994 struct page *page = sg_page_iter_page(&sg_iter);
1997 set_page_dirty(page);
1999 if (obj->madv == I915_MADV_WILLNEED)
2000 mark_page_accessed(page);
2002 page_cache_release(page);
2006 sg_free_table(obj->pages);
2011 i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
2013 const struct drm_i915_gem_object_ops *ops = obj->ops;
2015 if (obj->pages == NULL)
2018 if (obj->pages_pin_count)
2021 BUG_ON(i915_gem_obj_bound_any(obj));
2023 /* ->put_pages might need to allocate memory for the bit17 swizzle
2024 * array, hence protect them from being reaped by removing them from gtt
2026 list_del(&obj->global_list);
2028 ops->put_pages(obj);
2031 i915_gem_object_invalidate(obj);
2037 i915_gem_shrink(struct drm_i915_private *dev_priv,
2038 long target, unsigned flags)
2041 struct list_head *list;
2044 { &dev_priv->mm.unbound_list, I915_SHRINK_UNBOUND },
2045 { &dev_priv->mm.bound_list, I915_SHRINK_BOUND },
2048 unsigned long count = 0;
2051 * As we may completely rewrite the (un)bound list whilst unbinding
2052 * (due to retiring requests) we have to strictly process only
2053 * one element of the list at the time, and recheck the list
2054 * on every iteration.
2056 * In particular, we must hold a reference whilst removing the
2057 * object as we may end up waiting for and/or retiring the objects.
2058 * This might release the final reference (held by the active list)
2059 * and result in the object being freed from under us. This is
2060 * similar to the precautions the eviction code must take whilst
2063 * Also note that although these lists do not hold a reference to
2064 * the object we can safely grab one here: The final object
2065 * unreferencing and the bound_list are both protected by the
2066 * dev->struct_mutex and so we won't ever be able to observe an
2067 * object on the bound_list with a reference count equals 0.
2069 for (phase = phases; phase->list; phase++) {
2070 struct list_head still_in_list;
2072 if ((flags & phase->bit) == 0)
2075 INIT_LIST_HEAD(&still_in_list);
2076 while (count < target && !list_empty(phase->list)) {
2077 struct drm_i915_gem_object *obj;
2078 struct i915_vma *vma, *v;
2080 obj = list_first_entry(phase->list,
2081 typeof(*obj), global_list);
2082 list_move_tail(&obj->global_list, &still_in_list);
2084 if (flags & I915_SHRINK_PURGEABLE &&
2085 !i915_gem_object_is_purgeable(obj))
2088 drm_gem_object_reference(&obj->base);
2090 /* For the unbound phase, this should be a no-op! */
2091 list_for_each_entry_safe(vma, v,
2092 &obj->vma_list, vma_link)
2093 if (i915_vma_unbind(vma))
2096 if (i915_gem_object_put_pages(obj) == 0)
2097 count += obj->base.size >> PAGE_SHIFT;
2099 drm_gem_object_unreference(&obj->base);
2101 list_splice(&still_in_list, phase->list);
2107 static unsigned long
2108 i915_gem_shrink_all(struct drm_i915_private *dev_priv)
2110 i915_gem_evict_everything(dev_priv->dev);
2111 return i915_gem_shrink(dev_priv, LONG_MAX,
2112 I915_SHRINK_BOUND | I915_SHRINK_UNBOUND);
2116 i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
2118 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2120 struct address_space *mapping;
2121 struct sg_table *st;
2122 struct scatterlist *sg;
2123 struct sg_page_iter sg_iter;
2125 unsigned long last_pfn = 0; /* suppress gcc warning */
2128 /* Assert that the object is not currently in any GPU domain. As it
2129 * wasn't in the GTT, there shouldn't be any way it could have been in
2132 BUG_ON(obj->base.read_domains & I915_GEM_GPU_DOMAINS);
2133 BUG_ON(obj->base.write_domain & I915_GEM_GPU_DOMAINS);
2135 st = kmalloc(sizeof(*st), GFP_KERNEL);
2139 page_count = obj->base.size / PAGE_SIZE;
2140 if (sg_alloc_table(st, page_count, GFP_KERNEL)) {
2145 /* Get the list of pages out of our struct file. They'll be pinned
2146 * at this point until we release them.
2148 * Fail silently without starting the shrinker
2150 mapping = file_inode(obj->base.filp)->i_mapping;
2151 gfp = mapping_gfp_mask(mapping);
2152 gfp |= __GFP_NORETRY | __GFP_NOWARN | __GFP_NO_KSWAPD;
2153 gfp &= ~(__GFP_IO | __GFP_WAIT);
2156 for (i = 0; i < page_count; i++) {
2157 page = shmem_read_mapping_page_gfp(mapping, i, gfp);
2159 i915_gem_shrink(dev_priv,
2162 I915_SHRINK_UNBOUND |
2163 I915_SHRINK_PURGEABLE);
2164 page = shmem_read_mapping_page_gfp(mapping, i, gfp);
2167 /* We've tried hard to allocate the memory by reaping
2168 * our own buffer, now let the real VM do its job and
2169 * go down in flames if truly OOM.
2171 i915_gem_shrink_all(dev_priv);
2172 page = shmem_read_mapping_page(mapping, i);
2176 #ifdef CONFIG_SWIOTLB
2177 if (swiotlb_nr_tbl()) {
2179 sg_set_page(sg, page, PAGE_SIZE, 0);
2184 if (!i || page_to_pfn(page) != last_pfn + 1) {
2188 sg_set_page(sg, page, PAGE_SIZE, 0);
2190 sg->length += PAGE_SIZE;
2192 last_pfn = page_to_pfn(page);
2194 /* Check that the i965g/gm workaround works. */
2195 WARN_ON((gfp & __GFP_DMA32) && (last_pfn >= 0x00100000UL));
2197 #ifdef CONFIG_SWIOTLB
2198 if (!swiotlb_nr_tbl())
2203 if (i915_gem_object_needs_bit17_swizzle(obj))
2204 i915_gem_object_do_bit_17_swizzle(obj);
2210 for_each_sg_page(st->sgl, &sg_iter, st->nents, 0)
2211 page_cache_release(sg_page_iter_page(&sg_iter));
2215 /* shmemfs first checks if there is enough memory to allocate the page
2216 * and reports ENOSPC should there be insufficient, along with the usual
2217 * ENOMEM for a genuine allocation failure.
2219 * We use ENOSPC in our driver to mean that we have run out of aperture
2220 * space and so want to translate the error from shmemfs back to our
2221 * usual understanding of ENOMEM.
2223 if (PTR_ERR(page) == -ENOSPC)
2226 return PTR_ERR(page);
2229 /* Ensure that the associated pages are gathered from the backing storage
2230 * and pinned into our object. i915_gem_object_get_pages() may be called
2231 * multiple times before they are released by a single call to
2232 * i915_gem_object_put_pages() - once the pages are no longer referenced
2233 * either as a result of memory pressure (reaping pages under the shrinker)
2234 * or as the object is itself released.
2237 i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
2239 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2240 const struct drm_i915_gem_object_ops *ops = obj->ops;
2246 if (obj->madv != I915_MADV_WILLNEED) {
2247 DRM_DEBUG("Attempting to obtain a purgeable object\n");
2251 BUG_ON(obj->pages_pin_count);
2253 ret = ops->get_pages(obj);
2257 list_add_tail(&obj->global_list, &dev_priv->mm.unbound_list);
2262 i915_gem_object_move_to_active(struct drm_i915_gem_object *obj,
2263 struct intel_engine_cs *ring)
2265 u32 seqno = intel_ring_get_seqno(ring);
2267 BUG_ON(ring == NULL);
2268 if (obj->ring != ring && obj->last_write_seqno) {
2269 /* Keep the seqno relative to the current ring */
2270 obj->last_write_seqno = seqno;
2274 /* Add a reference if we're newly entering the active list. */
2276 drm_gem_object_reference(&obj->base);
2280 list_move_tail(&obj->ring_list, &ring->active_list);
2282 obj->last_read_seqno = seqno;
2285 void i915_vma_move_to_active(struct i915_vma *vma,
2286 struct intel_engine_cs *ring)
2288 list_move_tail(&vma->mm_list, &vma->vm->active_list);
2289 return i915_gem_object_move_to_active(vma->obj, ring);
2293 i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj)
2295 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2296 struct i915_address_space *vm;
2297 struct i915_vma *vma;
2299 BUG_ON(obj->base.write_domain & ~I915_GEM_GPU_DOMAINS);
2300 BUG_ON(!obj->active);
2302 list_for_each_entry(vm, &dev_priv->vm_list, global_link) {
2303 vma = i915_gem_obj_to_vma(obj, vm);
2304 if (vma && !list_empty(&vma->mm_list))
2305 list_move_tail(&vma->mm_list, &vm->inactive_list);
2308 intel_fb_obj_flush(obj, true);
2310 list_del_init(&obj->ring_list);
2313 obj->last_read_seqno = 0;
2314 obj->last_write_seqno = 0;
2315 obj->base.write_domain = 0;
2317 obj->last_fenced_seqno = 0;
2320 drm_gem_object_unreference(&obj->base);
2322 WARN_ON(i915_verify_lists(dev));
2326 i915_gem_object_retire(struct drm_i915_gem_object *obj)
2328 struct intel_engine_cs *ring = obj->ring;
2333 if (i915_seqno_passed(ring->get_seqno(ring, true),
2334 obj->last_read_seqno))
2335 i915_gem_object_move_to_inactive(obj);
2339 i915_gem_init_seqno(struct drm_device *dev, u32 seqno)
2341 struct drm_i915_private *dev_priv = dev->dev_private;
2342 struct intel_engine_cs *ring;
2345 /* Carefully retire all requests without writing to the rings */
2346 for_each_ring(ring, dev_priv, i) {
2347 ret = intel_ring_idle(ring);
2351 i915_gem_retire_requests(dev);
2353 /* Finally reset hw state */
2354 for_each_ring(ring, dev_priv, i) {
2355 intel_ring_init_seqno(ring, seqno);
2357 for (j = 0; j < ARRAY_SIZE(ring->semaphore.sync_seqno); j++)
2358 ring->semaphore.sync_seqno[j] = 0;
2364 int i915_gem_set_seqno(struct drm_device *dev, u32 seqno)
2366 struct drm_i915_private *dev_priv = dev->dev_private;
2372 /* HWS page needs to be set less than what we
2373 * will inject to ring
2375 ret = i915_gem_init_seqno(dev, seqno - 1);
2379 /* Carefully set the last_seqno value so that wrap
2380 * detection still works
2382 dev_priv->next_seqno = seqno;
2383 dev_priv->last_seqno = seqno - 1;
2384 if (dev_priv->last_seqno == 0)
2385 dev_priv->last_seqno--;
2391 i915_gem_get_seqno(struct drm_device *dev, u32 *seqno)
2393 struct drm_i915_private *dev_priv = dev->dev_private;
2395 /* reserve 0 for non-seqno */
2396 if (dev_priv->next_seqno == 0) {
2397 int ret = i915_gem_init_seqno(dev, 0);
2401 dev_priv->next_seqno = 1;
2404 *seqno = dev_priv->last_seqno = dev_priv->next_seqno++;
2408 int __i915_add_request(struct intel_engine_cs *ring,
2409 struct drm_file *file,
2410 struct drm_i915_gem_object *obj,
2413 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2414 struct drm_i915_gem_request *request;
2415 struct intel_ringbuffer *ringbuf;
2416 u32 request_ring_position, request_start;
2419 request = ring->preallocated_lazy_request;
2420 if (WARN_ON(request == NULL))
2423 if (i915.enable_execlists) {
2424 struct intel_context *ctx = request->ctx;
2425 ringbuf = ctx->engine[ring->id].ringbuf;
2427 ringbuf = ring->buffer;
2429 request_start = intel_ring_get_tail(ringbuf);
2431 * Emit any outstanding flushes - execbuf can fail to emit the flush
2432 * after having emitted the batchbuffer command. Hence we need to fix
2433 * things up similar to emitting the lazy request. The difference here
2434 * is that the flush _must_ happen before the next request, no matter
2437 if (i915.enable_execlists) {
2438 ret = logical_ring_flush_all_caches(ringbuf);
2442 ret = intel_ring_flush_all_caches(ring);
2447 /* Record the position of the start of the request so that
2448 * should we detect the updated seqno part-way through the
2449 * GPU processing the request, we never over-estimate the
2450 * position of the head.
2452 request_ring_position = intel_ring_get_tail(ringbuf);
2454 if (i915.enable_execlists) {
2455 ret = ring->emit_request(ringbuf);
2459 ret = ring->add_request(ring);
2464 request->seqno = intel_ring_get_seqno(ring);
2465 request->ring = ring;
2466 request->head = request_start;
2467 request->tail = request_ring_position;
2469 /* Whilst this request exists, batch_obj will be on the
2470 * active_list, and so will hold the active reference. Only when this
2471 * request is retired will the the batch_obj be moved onto the
2472 * inactive_list and lose its active reference. Hence we do not need
2473 * to explicitly hold another reference here.
2475 request->batch_obj = obj;
2477 if (!i915.enable_execlists) {
2478 /* Hold a reference to the current context so that we can inspect
2479 * it later in case a hangcheck error event fires.
2481 request->ctx = ring->last_context;
2483 i915_gem_context_reference(request->ctx);
2486 request->emitted_jiffies = jiffies;
2487 list_add_tail(&request->list, &ring->request_list);
2488 request->file_priv = NULL;
2491 struct drm_i915_file_private *file_priv = file->driver_priv;
2493 spin_lock(&file_priv->mm.lock);
2494 request->file_priv = file_priv;
2495 list_add_tail(&request->client_list,
2496 &file_priv->mm.request_list);
2497 spin_unlock(&file_priv->mm.lock);
2500 trace_i915_gem_request_add(ring, request->seqno);
2501 ring->outstanding_lazy_seqno = 0;
2502 ring->preallocated_lazy_request = NULL;
2504 if (!dev_priv->ums.mm_suspended) {
2505 i915_queue_hangcheck(ring->dev);
2507 cancel_delayed_work_sync(&dev_priv->mm.idle_work);
2508 queue_delayed_work(dev_priv->wq,
2509 &dev_priv->mm.retire_work,
2510 round_jiffies_up_relative(HZ));
2511 intel_mark_busy(dev_priv->dev);
2515 *out_seqno = request->seqno;
2520 i915_gem_request_remove_from_client(struct drm_i915_gem_request *request)
2522 struct drm_i915_file_private *file_priv = request->file_priv;
2527 spin_lock(&file_priv->mm.lock);
2528 list_del(&request->client_list);
2529 request->file_priv = NULL;
2530 spin_unlock(&file_priv->mm.lock);
2533 static bool i915_context_is_banned(struct drm_i915_private *dev_priv,
2534 const struct intel_context *ctx)
2536 unsigned long elapsed;
2538 elapsed = get_seconds() - ctx->hang_stats.guilty_ts;
2540 if (ctx->hang_stats.banned)
2543 if (elapsed <= DRM_I915_CTX_BAN_PERIOD) {
2544 if (!i915_gem_context_is_default(ctx)) {
2545 DRM_DEBUG("context hanging too fast, banning!\n");
2547 } else if (i915_stop_ring_allow_ban(dev_priv)) {
2548 if (i915_stop_ring_allow_warn(dev_priv))
2549 DRM_ERROR("gpu hanging too fast, banning!\n");
2557 static void i915_set_reset_status(struct drm_i915_private *dev_priv,
2558 struct intel_context *ctx,
2561 struct i915_ctx_hang_stats *hs;
2566 hs = &ctx->hang_stats;
2569 hs->banned = i915_context_is_banned(dev_priv, ctx);
2571 hs->guilty_ts = get_seconds();
2573 hs->batch_pending++;
2577 static void i915_gem_free_request(struct drm_i915_gem_request *request)
2579 struct intel_context *ctx = request->ctx;
2581 list_del(&request->list);
2582 i915_gem_request_remove_from_client(request);
2584 if (i915.enable_execlists && ctx) {
2585 struct intel_engine_cs *ring = request->ring;
2587 if (ctx != ring->default_context)
2588 intel_lr_context_unpin(ring, ctx);
2589 i915_gem_context_unreference(ctx);
2594 struct drm_i915_gem_request *
2595 i915_gem_find_active_request(struct intel_engine_cs *ring)
2597 struct drm_i915_gem_request *request;
2598 u32 completed_seqno;
2600 completed_seqno = ring->get_seqno(ring, false);
2602 list_for_each_entry(request, &ring->request_list, list) {
2603 if (i915_seqno_passed(completed_seqno, request->seqno))
2612 static void i915_gem_reset_ring_status(struct drm_i915_private *dev_priv,
2613 struct intel_engine_cs *ring)
2615 struct drm_i915_gem_request *request;
2618 request = i915_gem_find_active_request(ring);
2620 if (request == NULL)
2623 ring_hung = ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG;
2625 i915_set_reset_status(dev_priv, request->ctx, ring_hung);
2627 list_for_each_entry_continue(request, &ring->request_list, list)
2628 i915_set_reset_status(dev_priv, request->ctx, false);
2631 static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv,
2632 struct intel_engine_cs *ring)
2634 while (!list_empty(&ring->active_list)) {
2635 struct drm_i915_gem_object *obj;
2637 obj = list_first_entry(&ring->active_list,
2638 struct drm_i915_gem_object,
2641 i915_gem_object_move_to_inactive(obj);
2645 * Clear the execlists queue up before freeing the requests, as those
2646 * are the ones that keep the context and ringbuffer backing objects
2649 while (!list_empty(&ring->execlist_queue)) {
2650 struct intel_ctx_submit_request *submit_req;
2652 submit_req = list_first_entry(&ring->execlist_queue,
2653 struct intel_ctx_submit_request,
2655 list_del(&submit_req->execlist_link);
2656 intel_runtime_pm_put(dev_priv);
2657 i915_gem_context_unreference(submit_req->ctx);
2662 * We must free the requests after all the corresponding objects have
2663 * been moved off active lists. Which is the same order as the normal
2664 * retire_requests function does. This is important if object hold
2665 * implicit references on things like e.g. ppgtt address spaces through
2668 while (!list_empty(&ring->request_list)) {
2669 struct drm_i915_gem_request *request;
2671 request = list_first_entry(&ring->request_list,
2672 struct drm_i915_gem_request,
2675 i915_gem_free_request(request);
2678 /* These may not have been flush before the reset, do so now */
2679 kfree(ring->preallocated_lazy_request);
2680 ring->preallocated_lazy_request = NULL;
2681 ring->outstanding_lazy_seqno = 0;
2684 void i915_gem_restore_fences(struct drm_device *dev)
2686 struct drm_i915_private *dev_priv = dev->dev_private;
2689 for (i = 0; i < dev_priv->num_fence_regs; i++) {
2690 struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i];
2693 * Commit delayed tiling changes if we have an object still
2694 * attached to the fence, otherwise just clear the fence.
2697 i915_gem_object_update_fence(reg->obj, reg,
2698 reg->obj->tiling_mode);
2700 i915_gem_write_fence(dev, i, NULL);
2705 void i915_gem_reset(struct drm_device *dev)
2707 struct drm_i915_private *dev_priv = dev->dev_private;
2708 struct intel_engine_cs *ring;
2712 * Before we free the objects from the requests, we need to inspect
2713 * them for finding the guilty party. As the requests only borrow
2714 * their reference to the objects, the inspection must be done first.
2716 for_each_ring(ring, dev_priv, i)
2717 i915_gem_reset_ring_status(dev_priv, ring);
2719 for_each_ring(ring, dev_priv, i)
2720 i915_gem_reset_ring_cleanup(dev_priv, ring);
2722 i915_gem_context_reset(dev);
2724 i915_gem_restore_fences(dev);
2728 * This function clears the request list as sequence numbers are passed.
2731 i915_gem_retire_requests_ring(struct intel_engine_cs *ring)
2735 if (list_empty(&ring->request_list))
2738 WARN_ON(i915_verify_lists(ring->dev));
2740 seqno = ring->get_seqno(ring, true);
2742 /* Move any buffers on the active list that are no longer referenced
2743 * by the ringbuffer to the flushing/inactive lists as appropriate,
2744 * before we free the context associated with the requests.
2746 while (!list_empty(&ring->active_list)) {
2747 struct drm_i915_gem_object *obj;
2749 obj = list_first_entry(&ring->active_list,
2750 struct drm_i915_gem_object,
2753 if (!i915_seqno_passed(seqno, obj->last_read_seqno))
2756 i915_gem_object_move_to_inactive(obj);
2760 while (!list_empty(&ring->request_list)) {
2761 struct drm_i915_gem_request *request;
2762 struct intel_ringbuffer *ringbuf;
2764 request = list_first_entry(&ring->request_list,
2765 struct drm_i915_gem_request,
2768 if (!i915_seqno_passed(seqno, request->seqno))
2771 trace_i915_gem_request_retire(ring, request->seqno);
2773 /* This is one of the few common intersection points
2774 * between legacy ringbuffer submission and execlists:
2775 * we need to tell them apart in order to find the correct
2776 * ringbuffer to which the request belongs to.
2778 if (i915.enable_execlists) {
2779 struct intel_context *ctx = request->ctx;
2780 ringbuf = ctx->engine[ring->id].ringbuf;
2782 ringbuf = ring->buffer;
2784 /* We know the GPU must have read the request to have
2785 * sent us the seqno + interrupt, so use the position
2786 * of tail of the request to update the last known position
2789 ringbuf->last_retired_head = request->tail;
2791 i915_gem_free_request(request);
2794 if (unlikely(ring->trace_irq_seqno &&
2795 i915_seqno_passed(seqno, ring->trace_irq_seqno))) {
2796 ring->irq_put(ring);
2797 ring->trace_irq_seqno = 0;
2800 WARN_ON(i915_verify_lists(ring->dev));
2804 i915_gem_retire_requests(struct drm_device *dev)
2806 struct drm_i915_private *dev_priv = dev->dev_private;
2807 struct intel_engine_cs *ring;
2811 for_each_ring(ring, dev_priv, i) {
2812 i915_gem_retire_requests_ring(ring);
2813 idle &= list_empty(&ring->request_list);
2814 if (i915.enable_execlists) {
2815 unsigned long flags;
2817 spin_lock_irqsave(&ring->execlist_lock, flags);
2818 idle &= list_empty(&ring->execlist_queue);
2819 spin_unlock_irqrestore(&ring->execlist_lock, flags);
2821 intel_execlists_retire_requests(ring);
2826 mod_delayed_work(dev_priv->wq,
2827 &dev_priv->mm.idle_work,
2828 msecs_to_jiffies(100));
2834 i915_gem_retire_work_handler(struct work_struct *work)
2836 struct drm_i915_private *dev_priv =
2837 container_of(work, typeof(*dev_priv), mm.retire_work.work);
2838 struct drm_device *dev = dev_priv->dev;
2841 /* Come back later if the device is busy... */
2843 if (mutex_trylock(&dev->struct_mutex)) {
2844 idle = i915_gem_retire_requests(dev);
2845 mutex_unlock(&dev->struct_mutex);
2848 queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work,
2849 round_jiffies_up_relative(HZ));
2853 i915_gem_idle_work_handler(struct work_struct *work)
2855 struct drm_i915_private *dev_priv =
2856 container_of(work, typeof(*dev_priv), mm.idle_work.work);
2858 intel_mark_idle(dev_priv->dev);
2862 * Ensures that an object will eventually get non-busy by flushing any required
2863 * write domains, emitting any outstanding lazy request and retiring and
2864 * completed requests.
2867 i915_gem_object_flush_active(struct drm_i915_gem_object *obj)
2872 ret = i915_gem_check_olr(obj->ring, obj->last_read_seqno);
2876 i915_gem_retire_requests_ring(obj->ring);
2883 * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT
2884 * @DRM_IOCTL_ARGS: standard ioctl arguments
2886 * Returns 0 if successful, else an error is returned with the remaining time in
2887 * the timeout parameter.
2888 * -ETIME: object is still busy after timeout
2889 * -ERESTARTSYS: signal interrupted the wait
2890 * -ENONENT: object doesn't exist
2891 * Also possible, but rare:
2892 * -EAGAIN: GPU wedged
2894 * -ENODEV: Internal IRQ fail
2895 * -E?: The add request failed
2897 * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any
2898 * non-zero timeout parameter the wait ioctl will wait for the given number of
2899 * nanoseconds on an object becoming unbusy. Since the wait itself does so
2900 * without holding struct_mutex the object may become re-busied before this
2901 * function completes. A similar but shorter * race condition exists in the busy
2905 i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
2907 struct drm_i915_private *dev_priv = dev->dev_private;
2908 struct drm_i915_gem_wait *args = data;
2909 struct drm_i915_gem_object *obj;
2910 struct intel_engine_cs *ring = NULL;
2911 unsigned reset_counter;
2915 if (args->flags != 0)
2918 ret = i915_mutex_lock_interruptible(dev);
2922 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->bo_handle));
2923 if (&obj->base == NULL) {
2924 mutex_unlock(&dev->struct_mutex);
2928 /* Need to make sure the object gets inactive eventually. */
2929 ret = i915_gem_object_flush_active(obj);
2934 seqno = obj->last_read_seqno;
2941 /* Do this after OLR check to make sure we make forward progress polling
2942 * on this IOCTL with a timeout <=0 (like busy ioctl)
2944 if (args->timeout_ns <= 0) {
2949 drm_gem_object_unreference(&obj->base);
2950 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
2951 mutex_unlock(&dev->struct_mutex);
2953 return __i915_wait_seqno(ring, seqno, reset_counter, true,
2954 &args->timeout_ns, file->driver_priv);
2957 drm_gem_object_unreference(&obj->base);
2958 mutex_unlock(&dev->struct_mutex);
2963 * i915_gem_object_sync - sync an object to a ring.
2965 * @obj: object which may be in use on another ring.
2966 * @to: ring we wish to use the object on. May be NULL.
2968 * This code is meant to abstract object synchronization with the GPU.
2969 * Calling with NULL implies synchronizing the object with the CPU
2970 * rather than a particular GPU ring.
2972 * Returns 0 if successful, else propagates up the lower layer error.
2975 i915_gem_object_sync(struct drm_i915_gem_object *obj,
2976 struct intel_engine_cs *to)
2978 struct intel_engine_cs *from = obj->ring;
2982 if (from == NULL || to == from)
2985 if (to == NULL || !i915_semaphore_is_enabled(obj->base.dev))
2986 return i915_gem_object_wait_rendering(obj, false);
2988 idx = intel_ring_sync_index(from, to);
2990 seqno = obj->last_read_seqno;
2991 /* Optimization: Avoid semaphore sync when we are sure we already
2992 * waited for an object with higher seqno */
2993 if (seqno <= from->semaphore.sync_seqno[idx])
2996 ret = i915_gem_check_olr(obj->ring, seqno);
3000 trace_i915_gem_ring_sync_to(from, to, seqno);
3001 ret = to->semaphore.sync_to(to, from, seqno);
3003 /* We use last_read_seqno because sync_to()
3004 * might have just caused seqno wrap under
3007 from->semaphore.sync_seqno[idx] = obj->last_read_seqno;
3012 static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj)
3014 u32 old_write_domain, old_read_domains;
3016 /* Force a pagefault for domain tracking on next user access */
3017 i915_gem_release_mmap(obj);
3019 if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
3022 /* Wait for any direct GTT access to complete */
3025 old_read_domains = obj->base.read_domains;
3026 old_write_domain = obj->base.write_domain;
3028 obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT;
3029 obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT;
3031 trace_i915_gem_object_change_domain(obj,
3036 int i915_vma_unbind(struct i915_vma *vma)
3038 struct drm_i915_gem_object *obj = vma->obj;
3039 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3042 if (list_empty(&vma->vma_link))
3045 if (!drm_mm_node_allocated(&vma->node)) {
3046 i915_gem_vma_destroy(vma);
3053 BUG_ON(obj->pages == NULL);
3055 ret = i915_gem_object_finish_gpu(obj);
3058 /* Continue on if we fail due to EIO, the GPU is hung so we
3059 * should be safe and we need to cleanup or else we might
3060 * cause memory corruption through use-after-free.
3063 /* Throw away the active reference before moving to the unbound list */
3064 i915_gem_object_retire(obj);
3066 if (i915_is_ggtt(vma->vm)) {
3067 i915_gem_object_finish_gtt(obj);
3069 /* release the fence reg _after_ flushing */
3070 ret = i915_gem_object_put_fence(obj);
3075 trace_i915_vma_unbind(vma);
3077 vma->unbind_vma(vma);
3079 list_del_init(&vma->mm_list);
3080 if (i915_is_ggtt(vma->vm))
3081 obj->map_and_fenceable = false;
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 i915_gem_gtt_finish_object(obj);
3090 list_move_tail(&obj->global_list, &dev_priv->mm.unbound_list);
3093 /* And finally now the object is completely decoupled from this vma,
3094 * we can drop its hold on the backing storage and allow it to be
3095 * reaped by the shrinker.
3097 i915_gem_object_unpin_pages(obj);
3102 int i915_gpu_idle(struct drm_device *dev)
3104 struct drm_i915_private *dev_priv = dev->dev_private;
3105 struct intel_engine_cs *ring;
3108 /* Flush everything onto the inactive list. */
3109 for_each_ring(ring, dev_priv, i) {
3110 if (!i915.enable_execlists) {
3111 ret = i915_switch_context(ring, ring->default_context);
3116 ret = intel_ring_idle(ring);
3124 static void i965_write_fence_reg(struct drm_device *dev, int reg,
3125 struct drm_i915_gem_object *obj)
3127 struct drm_i915_private *dev_priv = dev->dev_private;
3129 int fence_pitch_shift;
3131 if (INTEL_INFO(dev)->gen >= 6) {
3132 fence_reg = FENCE_REG_SANDYBRIDGE_0;
3133 fence_pitch_shift = SANDYBRIDGE_FENCE_PITCH_SHIFT;
3135 fence_reg = FENCE_REG_965_0;
3136 fence_pitch_shift = I965_FENCE_PITCH_SHIFT;
3139 fence_reg += reg * 8;
3141 /* To w/a incoherency with non-atomic 64-bit register updates,
3142 * we split the 64-bit update into two 32-bit writes. In order
3143 * for a partial fence not to be evaluated between writes, we
3144 * precede the update with write to turn off the fence register,
3145 * and only enable the fence as the last step.
3147 * For extra levels of paranoia, we make sure each step lands
3148 * before applying the next step.
3150 I915_WRITE(fence_reg, 0);
3151 POSTING_READ(fence_reg);
3154 u32 size = i915_gem_obj_ggtt_size(obj);
3157 val = (uint64_t)((i915_gem_obj_ggtt_offset(obj) + size - 4096) &
3159 val |= i915_gem_obj_ggtt_offset(obj) & 0xfffff000;
3160 val |= (uint64_t)((obj->stride / 128) - 1) << fence_pitch_shift;
3161 if (obj->tiling_mode == I915_TILING_Y)
3162 val |= 1 << I965_FENCE_TILING_Y_SHIFT;
3163 val |= I965_FENCE_REG_VALID;
3165 I915_WRITE(fence_reg + 4, val >> 32);
3166 POSTING_READ(fence_reg + 4);
3168 I915_WRITE(fence_reg + 0, val);
3169 POSTING_READ(fence_reg);
3171 I915_WRITE(fence_reg + 4, 0);
3172 POSTING_READ(fence_reg + 4);
3176 static void i915_write_fence_reg(struct drm_device *dev, int reg,
3177 struct drm_i915_gem_object *obj)
3179 struct drm_i915_private *dev_priv = dev->dev_private;
3183 u32 size = i915_gem_obj_ggtt_size(obj);
3187 WARN((i915_gem_obj_ggtt_offset(obj) & ~I915_FENCE_START_MASK) ||
3188 (size & -size) != size ||
3189 (i915_gem_obj_ggtt_offset(obj) & (size - 1)),
3190 "object 0x%08lx [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
3191 i915_gem_obj_ggtt_offset(obj), obj->map_and_fenceable, size);
3193 if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev))
3198 /* Note: pitch better be a power of two tile widths */
3199 pitch_val = obj->stride / tile_width;
3200 pitch_val = ffs(pitch_val) - 1;
3202 val = i915_gem_obj_ggtt_offset(obj);
3203 if (obj->tiling_mode == I915_TILING_Y)
3204 val |= 1 << I830_FENCE_TILING_Y_SHIFT;
3205 val |= I915_FENCE_SIZE_BITS(size);
3206 val |= pitch_val << I830_FENCE_PITCH_SHIFT;
3207 val |= I830_FENCE_REG_VALID;
3212 reg = FENCE_REG_830_0 + reg * 4;
3214 reg = FENCE_REG_945_8 + (reg - 8) * 4;
3216 I915_WRITE(reg, val);
3220 static void i830_write_fence_reg(struct drm_device *dev, int reg,
3221 struct drm_i915_gem_object *obj)
3223 struct drm_i915_private *dev_priv = dev->dev_private;
3227 u32 size = i915_gem_obj_ggtt_size(obj);
3230 WARN((i915_gem_obj_ggtt_offset(obj) & ~I830_FENCE_START_MASK) ||
3231 (size & -size) != size ||
3232 (i915_gem_obj_ggtt_offset(obj) & (size - 1)),
3233 "object 0x%08lx not 512K or pot-size 0x%08x aligned\n",
3234 i915_gem_obj_ggtt_offset(obj), size);
3236 pitch_val = obj->stride / 128;
3237 pitch_val = ffs(pitch_val) - 1;
3239 val = i915_gem_obj_ggtt_offset(obj);
3240 if (obj->tiling_mode == I915_TILING_Y)
3241 val |= 1 << I830_FENCE_TILING_Y_SHIFT;
3242 val |= I830_FENCE_SIZE_BITS(size);
3243 val |= pitch_val << I830_FENCE_PITCH_SHIFT;
3244 val |= I830_FENCE_REG_VALID;
3248 I915_WRITE(FENCE_REG_830_0 + reg * 4, val);
3249 POSTING_READ(FENCE_REG_830_0 + reg * 4);
3252 inline static bool i915_gem_object_needs_mb(struct drm_i915_gem_object *obj)
3254 return obj && obj->base.read_domains & I915_GEM_DOMAIN_GTT;
3257 static void i915_gem_write_fence(struct drm_device *dev, int reg,
3258 struct drm_i915_gem_object *obj)
3260 struct drm_i915_private *dev_priv = dev->dev_private;
3262 /* Ensure that all CPU reads are completed before installing a fence
3263 * and all writes before removing the fence.
3265 if (i915_gem_object_needs_mb(dev_priv->fence_regs[reg].obj))
3268 WARN(obj && (!obj->stride || !obj->tiling_mode),
3269 "bogus fence setup with stride: 0x%x, tiling mode: %i\n",
3270 obj->stride, obj->tiling_mode);
3272 switch (INTEL_INFO(dev)->gen) {
3278 case 4: i965_write_fence_reg(dev, reg, obj); break;
3279 case 3: i915_write_fence_reg(dev, reg, obj); break;
3280 case 2: i830_write_fence_reg(dev, reg, obj); break;
3284 /* And similarly be paranoid that no direct access to this region
3285 * is reordered to before the fence is installed.
3287 if (i915_gem_object_needs_mb(obj))
3291 static inline int fence_number(struct drm_i915_private *dev_priv,
3292 struct drm_i915_fence_reg *fence)
3294 return fence - dev_priv->fence_regs;
3297 static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj,
3298 struct drm_i915_fence_reg *fence,
3301 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3302 int reg = fence_number(dev_priv, fence);
3304 i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL);
3307 obj->fence_reg = reg;
3309 list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list);
3311 obj->fence_reg = I915_FENCE_REG_NONE;
3313 list_del_init(&fence->lru_list);
3315 obj->fence_dirty = false;
3319 i915_gem_object_wait_fence(struct drm_i915_gem_object *obj)
3321 if (obj->last_fenced_seqno) {
3322 int ret = i915_wait_seqno(obj->ring, obj->last_fenced_seqno);
3326 obj->last_fenced_seqno = 0;
3333 i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
3335 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3336 struct drm_i915_fence_reg *fence;
3339 ret = i915_gem_object_wait_fence(obj);
3343 if (obj->fence_reg == I915_FENCE_REG_NONE)
3346 fence = &dev_priv->fence_regs[obj->fence_reg];
3348 if (WARN_ON(fence->pin_count))
3351 i915_gem_object_fence_lost(obj);
3352 i915_gem_object_update_fence(obj, fence, false);
3357 static struct drm_i915_fence_reg *
3358 i915_find_fence_reg(struct drm_device *dev)
3360 struct drm_i915_private *dev_priv = dev->dev_private;
3361 struct drm_i915_fence_reg *reg, *avail;
3364 /* First try to find a free reg */
3366 for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) {
3367 reg = &dev_priv->fence_regs[i];
3371 if (!reg->pin_count)
3378 /* None available, try to steal one or wait for a user to finish */
3379 list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) {
3387 /* Wait for completion of pending flips which consume fences */
3388 if (intel_has_pending_fb_unpin(dev))
3389 return ERR_PTR(-EAGAIN);
3391 return ERR_PTR(-EDEADLK);
3395 * i915_gem_object_get_fence - set up fencing for an object
3396 * @obj: object to map through a fence reg
3398 * When mapping objects through the GTT, userspace wants to be able to write
3399 * to them without having to worry about swizzling if the object is tiled.
3400 * This function walks the fence regs looking for a free one for @obj,
3401 * stealing one if it can't find any.
3403 * It then sets up the reg based on the object's properties: address, pitch
3404 * and tiling format.
3406 * For an untiled surface, this removes any existing fence.
3409 i915_gem_object_get_fence(struct drm_i915_gem_object *obj)
3411 struct drm_device *dev = obj->base.dev;
3412 struct drm_i915_private *dev_priv = dev->dev_private;
3413 bool enable = obj->tiling_mode != I915_TILING_NONE;
3414 struct drm_i915_fence_reg *reg;
3417 /* Have we updated the tiling parameters upon the object and so
3418 * will need to serialise the write to the associated fence register?
3420 if (obj->fence_dirty) {
3421 ret = i915_gem_object_wait_fence(obj);
3426 /* Just update our place in the LRU if our fence is getting reused. */
3427 if (obj->fence_reg != I915_FENCE_REG_NONE) {
3428 reg = &dev_priv->fence_regs[obj->fence_reg];
3429 if (!obj->fence_dirty) {
3430 list_move_tail(®->lru_list,
3431 &dev_priv->mm.fence_list);
3434 } else if (enable) {
3435 if (WARN_ON(!obj->map_and_fenceable))
3438 reg = i915_find_fence_reg(dev);
3440 return PTR_ERR(reg);
3443 struct drm_i915_gem_object *old = reg->obj;
3445 ret = i915_gem_object_wait_fence(old);
3449 i915_gem_object_fence_lost(old);
3454 i915_gem_object_update_fence(obj, reg, enable);
3459 static bool i915_gem_valid_gtt_space(struct i915_vma *vma,
3460 unsigned long cache_level)
3462 struct drm_mm_node *gtt_space = &vma->node;
3463 struct drm_mm_node *other;
3466 * On some machines we have to be careful when putting differing types
3467 * of snoopable memory together to avoid the prefetcher crossing memory
3468 * domains and dying. During vm initialisation, we decide whether or not
3469 * these constraints apply and set the drm_mm.color_adjust
3472 if (vma->vm->mm.color_adjust == NULL)
3475 if (!drm_mm_node_allocated(gtt_space))
3478 if (list_empty(>t_space->node_list))
3481 other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list);
3482 if (other->allocated && !other->hole_follows && other->color != cache_level)
3485 other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list);
3486 if (other->allocated && !gtt_space->hole_follows && other->color != cache_level)
3493 * Finds free space in the GTT aperture and binds the object there.
3495 static struct i915_vma *
3496 i915_gem_object_bind_to_vm(struct drm_i915_gem_object *obj,
3497 struct i915_address_space *vm,
3501 struct drm_device *dev = obj->base.dev;
3502 struct drm_i915_private *dev_priv = dev->dev_private;
3503 u32 size, fence_size, fence_alignment, unfenced_alignment;
3504 unsigned long start =
3505 flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;
3507 flags & PIN_MAPPABLE ? dev_priv->gtt.mappable_end : vm->total;
3508 struct i915_vma *vma;
3511 fence_size = i915_gem_get_gtt_size(dev,
3514 fence_alignment = i915_gem_get_gtt_alignment(dev,
3516 obj->tiling_mode, true);
3517 unfenced_alignment =
3518 i915_gem_get_gtt_alignment(dev,
3520 obj->tiling_mode, false);
3523 alignment = flags & PIN_MAPPABLE ? fence_alignment :
3525 if (flags & PIN_MAPPABLE && alignment & (fence_alignment - 1)) {
3526 DRM_DEBUG("Invalid object alignment requested %u\n", alignment);
3527 return ERR_PTR(-EINVAL);
3530 size = flags & PIN_MAPPABLE ? fence_size : obj->base.size;
3532 /* If the object is bigger than the entire aperture, reject it early
3533 * before evicting everything in a vain attempt to find space.
3535 if (obj->base.size > end) {
3536 DRM_DEBUG("Attempting to bind an object larger than the aperture: object=%zd > %s aperture=%lu\n",
3538 flags & PIN_MAPPABLE ? "mappable" : "total",
3540 return ERR_PTR(-E2BIG);
3543 ret = i915_gem_object_get_pages(obj);
3545 return ERR_PTR(ret);
3547 i915_gem_object_pin_pages(obj);
3549 vma = i915_gem_obj_lookup_or_create_vma(obj, vm);
3554 ret = drm_mm_insert_node_in_range_generic(&vm->mm, &vma->node,
3558 DRM_MM_SEARCH_DEFAULT,
3559 DRM_MM_CREATE_DEFAULT);
3561 ret = i915_gem_evict_something(dev, vm, size, alignment,
3570 if (WARN_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level))) {
3572 goto err_remove_node;
3575 ret = i915_gem_gtt_prepare_object(obj);
3577 goto err_remove_node;
3579 list_move_tail(&obj->global_list, &dev_priv->mm.bound_list);
3580 list_add_tail(&vma->mm_list, &vm->inactive_list);
3582 trace_i915_vma_bind(vma, flags);
3583 vma->bind_vma(vma, obj->cache_level,
3584 flags & PIN_GLOBAL ? GLOBAL_BIND : 0);
3589 drm_mm_remove_node(&vma->node);
3591 i915_gem_vma_destroy(vma);
3594 i915_gem_object_unpin_pages(obj);
3599 i915_gem_clflush_object(struct drm_i915_gem_object *obj,
3602 /* If we don't have a page list set up, then we're not pinned
3603 * to GPU, and we can ignore the cache flush because it'll happen
3604 * again at bind time.
3606 if (obj->pages == NULL)
3610 * Stolen memory is always coherent with the GPU as it is explicitly
3611 * marked as wc by the system, or the system is cache-coherent.
3613 if (obj->stolen || obj->phys_handle)
3616 /* If the GPU is snooping the contents of the CPU cache,
3617 * we do not need to manually clear the CPU cache lines. However,
3618 * the caches are only snooped when the render cache is
3619 * flushed/invalidated. As we always have to emit invalidations
3620 * and flushes when moving into and out of the RENDER domain, correct
3621 * snooping behaviour occurs naturally as the result of our domain
3624 if (!force && cpu_cache_is_coherent(obj->base.dev, obj->cache_level))
3627 trace_i915_gem_object_clflush(obj);
3628 drm_clflush_sg(obj->pages);
3633 /** Flushes the GTT write domain for the object if it's dirty. */
3635 i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj)
3637 uint32_t old_write_domain;
3639 if (obj->base.write_domain != I915_GEM_DOMAIN_GTT)
3642 /* No actual flushing is required for the GTT write domain. Writes
3643 * to it immediately go to main memory as far as we know, so there's
3644 * no chipset flush. It also doesn't land in render cache.
3646 * However, we do have to enforce the order so that all writes through
3647 * the GTT land before any writes to the device, such as updates to
3652 old_write_domain = obj->base.write_domain;
3653 obj->base.write_domain = 0;
3655 intel_fb_obj_flush(obj, false);
3657 trace_i915_gem_object_change_domain(obj,
3658 obj->base.read_domains,
3662 /** Flushes the CPU write domain for the object if it's dirty. */
3664 i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj,
3667 uint32_t old_write_domain;
3669 if (obj->base.write_domain != I915_GEM_DOMAIN_CPU)
3672 if (i915_gem_clflush_object(obj, force))
3673 i915_gem_chipset_flush(obj->base.dev);
3675 old_write_domain = obj->base.write_domain;
3676 obj->base.write_domain = 0;
3678 intel_fb_obj_flush(obj, false);
3680 trace_i915_gem_object_change_domain(obj,
3681 obj->base.read_domains,
3686 * Moves a single object to the GTT read, and possibly write domain.
3688 * This function returns when the move is complete, including waiting on
3692 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
3694 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3695 struct i915_vma *vma = i915_gem_obj_to_ggtt(obj);
3696 uint32_t old_write_domain, old_read_domains;
3699 /* Not valid to be called on unbound objects. */
3703 if (obj->base.write_domain == I915_GEM_DOMAIN_GTT)
3706 ret = i915_gem_object_wait_rendering(obj, !write);
3710 i915_gem_object_retire(obj);
3711 i915_gem_object_flush_cpu_write_domain(obj, false);
3713 /* Serialise direct access to this object with the barriers for
3714 * coherent writes from the GPU, by effectively invalidating the
3715 * GTT domain upon first access.
3717 if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
3720 old_write_domain = obj->base.write_domain;
3721 old_read_domains = obj->base.read_domains;
3723 /* It should now be out of any other write domains, and we can update
3724 * the domain values for our changes.
3726 BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0);
3727 obj->base.read_domains |= I915_GEM_DOMAIN_GTT;
3729 obj->base.read_domains = I915_GEM_DOMAIN_GTT;
3730 obj->base.write_domain = I915_GEM_DOMAIN_GTT;
3735 intel_fb_obj_invalidate(obj, NULL);
3737 trace_i915_gem_object_change_domain(obj,
3741 /* And bump the LRU for this access */
3742 if (i915_gem_object_is_inactive(obj))
3743 list_move_tail(&vma->mm_list,
3744 &dev_priv->gtt.base.inactive_list);
3749 int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
3750 enum i915_cache_level cache_level)
3752 struct drm_device *dev = obj->base.dev;
3753 struct i915_vma *vma, *next;
3756 if (obj->cache_level == cache_level)
3759 if (i915_gem_obj_is_pinned(obj)) {
3760 DRM_DEBUG("can not change the cache level of pinned objects\n");
3764 list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) {
3765 if (!i915_gem_valid_gtt_space(vma, cache_level)) {
3766 ret = i915_vma_unbind(vma);
3772 if (i915_gem_obj_bound_any(obj)) {
3773 ret = i915_gem_object_finish_gpu(obj);
3777 i915_gem_object_finish_gtt(obj);
3779 /* Before SandyBridge, you could not use tiling or fence
3780 * registers with snooped memory, so relinquish any fences
3781 * currently pointing to our region in the aperture.
3783 if (INTEL_INFO(dev)->gen < 6) {
3784 ret = i915_gem_object_put_fence(obj);
3789 list_for_each_entry(vma, &obj->vma_list, vma_link)
3790 if (drm_mm_node_allocated(&vma->node))
3791 vma->bind_vma(vma, cache_level,
3792 vma->bound & GLOBAL_BIND);
3795 list_for_each_entry(vma, &obj->vma_list, vma_link)
3796 vma->node.color = cache_level;
3797 obj->cache_level = cache_level;
3799 if (cpu_write_needs_clflush(obj)) {
3800 u32 old_read_domains, old_write_domain;
3802 /* If we're coming from LLC cached, then we haven't
3803 * actually been tracking whether the data is in the
3804 * CPU cache or not, since we only allow one bit set
3805 * in obj->write_domain and have been skipping the clflushes.
3806 * Just set it to the CPU cache for now.
3808 i915_gem_object_retire(obj);
3809 WARN_ON(obj->base.write_domain & ~I915_GEM_DOMAIN_CPU);
3811 old_read_domains = obj->base.read_domains;
3812 old_write_domain = obj->base.write_domain;
3814 obj->base.read_domains = I915_GEM_DOMAIN_CPU;
3815 obj->base.write_domain = I915_GEM_DOMAIN_CPU;
3817 trace_i915_gem_object_change_domain(obj,
3825 int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data,
3826 struct drm_file *file)
3828 struct drm_i915_gem_caching *args = data;
3829 struct drm_i915_gem_object *obj;
3832 ret = i915_mutex_lock_interruptible(dev);
3836 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
3837 if (&obj->base == NULL) {
3842 switch (obj->cache_level) {
3843 case I915_CACHE_LLC:
3844 case I915_CACHE_L3_LLC:
3845 args->caching = I915_CACHING_CACHED;
3849 args->caching = I915_CACHING_DISPLAY;
3853 args->caching = I915_CACHING_NONE;
3857 drm_gem_object_unreference(&obj->base);
3859 mutex_unlock(&dev->struct_mutex);
3863 int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
3864 struct drm_file *file)
3866 struct drm_i915_gem_caching *args = data;
3867 struct drm_i915_gem_object *obj;
3868 enum i915_cache_level level;
3871 switch (args->caching) {
3872 case I915_CACHING_NONE:
3873 level = I915_CACHE_NONE;
3875 case I915_CACHING_CACHED:
3876 level = I915_CACHE_LLC;
3878 case I915_CACHING_DISPLAY:
3879 level = HAS_WT(dev) ? I915_CACHE_WT : I915_CACHE_NONE;
3885 ret = i915_mutex_lock_interruptible(dev);
3889 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
3890 if (&obj->base == NULL) {
3895 ret = i915_gem_object_set_cache_level(obj, level);
3897 drm_gem_object_unreference(&obj->base);
3899 mutex_unlock(&dev->struct_mutex);
3903 static bool is_pin_display(struct drm_i915_gem_object *obj)
3905 struct i915_vma *vma;
3907 vma = i915_gem_obj_to_ggtt(obj);
3911 /* There are 3 sources that pin objects:
3912 * 1. The display engine (scanouts, sprites, cursors);
3913 * 2. Reservations for execbuffer;
3916 * We can ignore reservations as we hold the struct_mutex and
3917 * are only called outside of the reservation path. The user
3918 * can only increment pin_count once, and so if after
3919 * subtracting the potential reference by the user, any pin_count
3920 * remains, it must be due to another use by the display engine.
3922 return vma->pin_count - !!obj->user_pin_count;
3926 * Prepare buffer for display plane (scanout, cursors, etc).
3927 * Can be called from an uninterruptible phase (modesetting) and allows
3928 * any flushes to be pipelined (for pageflips).
3931 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
3933 struct intel_engine_cs *pipelined)
3935 u32 old_read_domains, old_write_domain;
3936 bool was_pin_display;
3939 if (pipelined != obj->ring) {
3940 ret = i915_gem_object_sync(obj, pipelined);
3945 /* Mark the pin_display early so that we account for the
3946 * display coherency whilst setting up the cache domains.
3948 was_pin_display = obj->pin_display;
3949 obj->pin_display = true;
3951 /* The display engine is not coherent with the LLC cache on gen6. As
3952 * a result, we make sure that the pinning that is about to occur is
3953 * done with uncached PTEs. This is lowest common denominator for all
3956 * However for gen6+, we could do better by using the GFDT bit instead
3957 * of uncaching, which would allow us to flush all the LLC-cached data
3958 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
3960 ret = i915_gem_object_set_cache_level(obj,
3961 HAS_WT(obj->base.dev) ? I915_CACHE_WT : I915_CACHE_NONE);
3963 goto err_unpin_display;
3965 /* As the user may map the buffer once pinned in the display plane
3966 * (e.g. libkms for the bootup splash), we have to ensure that we
3967 * always use map_and_fenceable for all scanout buffers.
3969 ret = i915_gem_obj_ggtt_pin(obj, alignment, PIN_MAPPABLE);
3971 goto err_unpin_display;
3973 i915_gem_object_flush_cpu_write_domain(obj, true);
3975 old_write_domain = obj->base.write_domain;
3976 old_read_domains = obj->base.read_domains;
3978 /* It should now be out of any other write domains, and we can update
3979 * the domain values for our changes.
3981 obj->base.write_domain = 0;
3982 obj->base.read_domains |= I915_GEM_DOMAIN_GTT;
3984 trace_i915_gem_object_change_domain(obj,
3991 WARN_ON(was_pin_display != is_pin_display(obj));
3992 obj->pin_display = was_pin_display;
3997 i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj)
3999 i915_gem_object_ggtt_unpin(obj);
4000 obj->pin_display = is_pin_display(obj);
4004 i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj)
4008 if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0)
4011 ret = i915_gem_object_wait_rendering(obj, false);
4015 /* Ensure that we invalidate the GPU's caches and TLBs. */
4016 obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS;
4021 * Moves a single object to the CPU read, and possibly write domain.
4023 * This function returns when the move is complete, including waiting on
4027 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write)
4029 uint32_t old_write_domain, old_read_domains;
4032 if (obj->base.write_domain == I915_GEM_DOMAIN_CPU)
4035 ret = i915_gem_object_wait_rendering(obj, !write);
4039 i915_gem_object_retire(obj);
4040 i915_gem_object_flush_gtt_write_domain(obj);
4042 old_write_domain = obj->base.write_domain;
4043 old_read_domains = obj->base.read_domains;
4045 /* Flush the CPU cache if it's still invalid. */
4046 if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) {
4047 i915_gem_clflush_object(obj, false);
4049 obj->base.read_domains |= I915_GEM_DOMAIN_CPU;
4052 /* It should now be out of any other write domains, and we can update
4053 * the domain values for our changes.
4055 BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0);
4057 /* If we're writing through the CPU, then the GPU read domains will
4058 * need to be invalidated at next use.
4061 obj->base.read_domains = I915_GEM_DOMAIN_CPU;
4062 obj->base.write_domain = I915_GEM_DOMAIN_CPU;
4066 intel_fb_obj_invalidate(obj, NULL);
4068 trace_i915_gem_object_change_domain(obj,
4075 /* Throttle our rendering by waiting until the ring has completed our requests
4076 * emitted over 20 msec ago.
4078 * Note that if we were to use the current jiffies each time around the loop,
4079 * we wouldn't escape the function with any frames outstanding if the time to
4080 * render a frame was over 20ms.
4082 * This should get us reasonable parallelism between CPU and GPU but also
4083 * relatively low latency when blocking on a particular request to finish.
4086 i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file)
4088 struct drm_i915_private *dev_priv = dev->dev_private;
4089 struct drm_i915_file_private *file_priv = file->driver_priv;
4090 unsigned long recent_enough = jiffies - msecs_to_jiffies(20);
4091 struct drm_i915_gem_request *request;
4092 struct intel_engine_cs *ring = NULL;
4093 unsigned reset_counter;
4097 ret = i915_gem_wait_for_error(&dev_priv->gpu_error);
4101 ret = i915_gem_check_wedge(&dev_priv->gpu_error, false);
4105 spin_lock(&file_priv->mm.lock);
4106 list_for_each_entry(request, &file_priv->mm.request_list, client_list) {
4107 if (time_after_eq(request->emitted_jiffies, recent_enough))
4110 ring = request->ring;
4111 seqno = request->seqno;
4113 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
4114 spin_unlock(&file_priv->mm.lock);
4119 ret = __i915_wait_seqno(ring, seqno, reset_counter, true, NULL, NULL);
4121 queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0);
4127 i915_vma_misplaced(struct i915_vma *vma, uint32_t alignment, uint64_t flags)
4129 struct drm_i915_gem_object *obj = vma->obj;
4132 vma->node.start & (alignment - 1))
4135 if (flags & PIN_MAPPABLE && !obj->map_and_fenceable)
4138 if (flags & PIN_OFFSET_BIAS &&
4139 vma->node.start < (flags & PIN_OFFSET_MASK))
4146 i915_gem_object_pin(struct drm_i915_gem_object *obj,
4147 struct i915_address_space *vm,
4151 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
4152 struct i915_vma *vma;
4156 if (WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base))
4159 if (WARN_ON(flags & (PIN_GLOBAL | PIN_MAPPABLE) && !i915_is_ggtt(vm)))
4162 if (WARN_ON((flags & (PIN_MAPPABLE | PIN_GLOBAL)) == PIN_MAPPABLE))
4165 vma = i915_gem_obj_to_vma(obj, vm);
4167 if (WARN_ON(vma->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT))
4170 if (i915_vma_misplaced(vma, alignment, flags)) {
4171 WARN(vma->pin_count,
4172 "bo is already pinned with incorrect alignment:"
4173 " offset=%lx, req.alignment=%x, req.map_and_fenceable=%d,"
4174 " obj->map_and_fenceable=%d\n",
4175 i915_gem_obj_offset(obj, vm), alignment,
4176 !!(flags & PIN_MAPPABLE),
4177 obj->map_and_fenceable);
4178 ret = i915_vma_unbind(vma);
4186 bound = vma ? vma->bound : 0;
4187 if (vma == NULL || !drm_mm_node_allocated(&vma->node)) {
4188 vma = i915_gem_object_bind_to_vm(obj, vm, alignment, flags);
4190 return PTR_ERR(vma);
4193 if (flags & PIN_GLOBAL && !(vma->bound & GLOBAL_BIND))
4194 vma->bind_vma(vma, obj->cache_level, GLOBAL_BIND);
4196 if ((bound ^ vma->bound) & GLOBAL_BIND) {
4197 bool mappable, fenceable;
4198 u32 fence_size, fence_alignment;
4200 fence_size = i915_gem_get_gtt_size(obj->base.dev,
4203 fence_alignment = i915_gem_get_gtt_alignment(obj->base.dev,
4208 fenceable = (vma->node.size == fence_size &&
4209 (vma->node.start & (fence_alignment - 1)) == 0);
4211 mappable = (vma->node.start + obj->base.size <=
4212 dev_priv->gtt.mappable_end);
4214 obj->map_and_fenceable = mappable && fenceable;
4217 WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable);
4220 if (flags & PIN_MAPPABLE)
4221 obj->pin_mappable |= true;
4227 i915_gem_object_ggtt_unpin(struct drm_i915_gem_object *obj)
4229 struct i915_vma *vma = i915_gem_obj_to_ggtt(obj);
4232 BUG_ON(vma->pin_count == 0);
4233 BUG_ON(!i915_gem_obj_ggtt_bound(obj));
4235 if (--vma->pin_count == 0)
4236 obj->pin_mappable = false;
4240 i915_gem_object_pin_fence(struct drm_i915_gem_object *obj)
4242 if (obj->fence_reg != I915_FENCE_REG_NONE) {
4243 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
4244 struct i915_vma *ggtt_vma = i915_gem_obj_to_ggtt(obj);
4246 WARN_ON(!ggtt_vma ||
4247 dev_priv->fence_regs[obj->fence_reg].pin_count >
4248 ggtt_vma->pin_count);
4249 dev_priv->fence_regs[obj->fence_reg].pin_count++;
4256 i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj)
4258 if (obj->fence_reg != I915_FENCE_REG_NONE) {
4259 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
4260 WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count <= 0);
4261 dev_priv->fence_regs[obj->fence_reg].pin_count--;
4266 i915_gem_pin_ioctl(struct drm_device *dev, void *data,
4267 struct drm_file *file)
4269 struct drm_i915_gem_pin *args = data;
4270 struct drm_i915_gem_object *obj;
4273 if (INTEL_INFO(dev)->gen >= 6)
4276 ret = i915_mutex_lock_interruptible(dev);
4280 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
4281 if (&obj->base == NULL) {
4286 if (obj->madv != I915_MADV_WILLNEED) {
4287 DRM_DEBUG("Attempting to pin a purgeable buffer\n");
4292 if (obj->pin_filp != NULL && obj->pin_filp != file) {
4293 DRM_DEBUG("Already pinned in i915_gem_pin_ioctl(): %d\n",
4299 if (obj->user_pin_count == ULONG_MAX) {
4304 if (obj->user_pin_count == 0) {
4305 ret = i915_gem_obj_ggtt_pin(obj, args->alignment, PIN_MAPPABLE);
4310 obj->user_pin_count++;
4311 obj->pin_filp = file;
4313 args->offset = i915_gem_obj_ggtt_offset(obj);
4315 drm_gem_object_unreference(&obj->base);
4317 mutex_unlock(&dev->struct_mutex);
4322 i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
4323 struct drm_file *file)
4325 struct drm_i915_gem_pin *args = data;
4326 struct drm_i915_gem_object *obj;
4329 ret = i915_mutex_lock_interruptible(dev);
4333 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
4334 if (&obj->base == NULL) {
4339 if (obj->pin_filp != file) {
4340 DRM_DEBUG("Not pinned by caller in i915_gem_pin_ioctl(): %d\n",
4345 obj->user_pin_count--;
4346 if (obj->user_pin_count == 0) {
4347 obj->pin_filp = NULL;
4348 i915_gem_object_ggtt_unpin(obj);
4352 drm_gem_object_unreference(&obj->base);
4354 mutex_unlock(&dev->struct_mutex);
4359 i915_gem_busy_ioctl(struct drm_device *dev, void *data,
4360 struct drm_file *file)
4362 struct drm_i915_gem_busy *args = data;
4363 struct drm_i915_gem_object *obj;
4366 ret = i915_mutex_lock_interruptible(dev);
4370 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
4371 if (&obj->base == NULL) {
4376 /* Count all active objects as busy, even if they are currently not used
4377 * by the gpu. Users of this interface expect objects to eventually
4378 * become non-busy without any further actions, therefore emit any
4379 * necessary flushes here.
4381 ret = i915_gem_object_flush_active(obj);
4383 args->busy = obj->active;
4385 BUILD_BUG_ON(I915_NUM_RINGS > 16);
4386 args->busy |= intel_ring_flag(obj->ring) << 16;
4389 drm_gem_object_unreference(&obj->base);
4391 mutex_unlock(&dev->struct_mutex);
4396 i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
4397 struct drm_file *file_priv)
4399 return i915_gem_ring_throttle(dev, file_priv);
4403 i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
4404 struct drm_file *file_priv)
4406 struct drm_i915_gem_madvise *args = data;
4407 struct drm_i915_gem_object *obj;
4410 switch (args->madv) {
4411 case I915_MADV_DONTNEED:
4412 case I915_MADV_WILLNEED:
4418 ret = i915_mutex_lock_interruptible(dev);
4422 obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle));
4423 if (&obj->base == NULL) {
4428 if (i915_gem_obj_is_pinned(obj)) {
4433 if (obj->madv != __I915_MADV_PURGED)
4434 obj->madv = args->madv;
4436 /* if the object is no longer attached, discard its backing storage */
4437 if (i915_gem_object_is_purgeable(obj) && obj->pages == NULL)
4438 i915_gem_object_truncate(obj);
4440 args->retained = obj->madv != __I915_MADV_PURGED;
4443 drm_gem_object_unreference(&obj->base);
4445 mutex_unlock(&dev->struct_mutex);
4449 void i915_gem_object_init(struct drm_i915_gem_object *obj,
4450 const struct drm_i915_gem_object_ops *ops)
4452 INIT_LIST_HEAD(&obj->global_list);
4453 INIT_LIST_HEAD(&obj->ring_list);
4454 INIT_LIST_HEAD(&obj->obj_exec_link);
4455 INIT_LIST_HEAD(&obj->vma_list);
4459 obj->fence_reg = I915_FENCE_REG_NONE;
4460 obj->madv = I915_MADV_WILLNEED;
4462 i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size);
4465 static const struct drm_i915_gem_object_ops i915_gem_object_ops = {
4466 .get_pages = i915_gem_object_get_pages_gtt,
4467 .put_pages = i915_gem_object_put_pages_gtt,
4470 struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
4473 struct drm_i915_gem_object *obj;
4474 struct address_space *mapping;
4477 obj = i915_gem_object_alloc(dev);
4481 if (drm_gem_object_init(dev, &obj->base, size) != 0) {
4482 i915_gem_object_free(obj);
4486 mask = GFP_HIGHUSER | __GFP_RECLAIMABLE;
4487 if (IS_CRESTLINE(dev) || IS_BROADWATER(dev)) {
4488 /* 965gm cannot relocate objects above 4GiB. */
4489 mask &= ~__GFP_HIGHMEM;
4490 mask |= __GFP_DMA32;
4493 mapping = file_inode(obj->base.filp)->i_mapping;
4494 mapping_set_gfp_mask(mapping, mask);
4496 i915_gem_object_init(obj, &i915_gem_object_ops);
4498 obj->base.write_domain = I915_GEM_DOMAIN_CPU;
4499 obj->base.read_domains = I915_GEM_DOMAIN_CPU;
4502 /* On some devices, we can have the GPU use the LLC (the CPU
4503 * cache) for about a 10% performance improvement
4504 * compared to uncached. Graphics requests other than
4505 * display scanout are coherent with the CPU in
4506 * accessing this cache. This means in this mode we
4507 * don't need to clflush on the CPU side, and on the
4508 * GPU side we only need to flush internal caches to
4509 * get data visible to the CPU.
4511 * However, we maintain the display planes as UC, and so
4512 * need to rebind when first used as such.
4514 obj->cache_level = I915_CACHE_LLC;
4516 obj->cache_level = I915_CACHE_NONE;
4518 trace_i915_gem_object_create(obj);
4523 static bool discard_backing_storage(struct drm_i915_gem_object *obj)
4525 /* If we are the last user of the backing storage (be it shmemfs
4526 * pages or stolen etc), we know that the pages are going to be
4527 * immediately released. In this case, we can then skip copying
4528 * back the contents from the GPU.
4531 if (obj->madv != I915_MADV_WILLNEED)
4534 if (obj->base.filp == NULL)
4537 /* At first glance, this looks racy, but then again so would be
4538 * userspace racing mmap against close. However, the first external
4539 * reference to the filp can only be obtained through the
4540 * i915_gem_mmap_ioctl() which safeguards us against the user
4541 * acquiring such a reference whilst we are in the middle of
4542 * freeing the object.
4544 return atomic_long_read(&obj->base.filp->f_count) == 1;
4547 void i915_gem_free_object(struct drm_gem_object *gem_obj)
4549 struct drm_i915_gem_object *obj = to_intel_bo(gem_obj);
4550 struct drm_device *dev = obj->base.dev;
4551 struct drm_i915_private *dev_priv = dev->dev_private;
4552 struct i915_vma *vma, *next;
4554 intel_runtime_pm_get(dev_priv);
4556 trace_i915_gem_object_destroy(obj);
4558 list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) {
4562 ret = i915_vma_unbind(vma);
4563 if (WARN_ON(ret == -ERESTARTSYS)) {
4564 bool was_interruptible;
4566 was_interruptible = dev_priv->mm.interruptible;
4567 dev_priv->mm.interruptible = false;
4569 WARN_ON(i915_vma_unbind(vma));
4571 dev_priv->mm.interruptible = was_interruptible;
4575 /* Stolen objects don't hold a ref, but do hold pin count. Fix that up
4576 * before progressing. */
4578 i915_gem_object_unpin_pages(obj);
4580 WARN_ON(obj->frontbuffer_bits);
4582 if (WARN_ON(obj->pages_pin_count))
4583 obj->pages_pin_count = 0;
4584 if (discard_backing_storage(obj))
4585 obj->madv = I915_MADV_DONTNEED;
4586 i915_gem_object_put_pages(obj);
4587 i915_gem_object_free_mmap_offset(obj);
4591 if (obj->base.import_attach)
4592 drm_prime_gem_destroy(&obj->base, NULL);
4594 if (obj->ops->release)
4595 obj->ops->release(obj);
4597 drm_gem_object_release(&obj->base);
4598 i915_gem_info_remove_obj(dev_priv, obj->base.size);
4601 i915_gem_object_free(obj);
4603 intel_runtime_pm_put(dev_priv);
4606 struct i915_vma *i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
4607 struct i915_address_space *vm)
4609 struct i915_vma *vma;
4610 list_for_each_entry(vma, &obj->vma_list, vma_link)
4617 void i915_gem_vma_destroy(struct i915_vma *vma)
4619 struct i915_address_space *vm = NULL;
4620 WARN_ON(vma->node.allocated);
4622 /* Keep the vma as a placeholder in the execbuffer reservation lists */
4623 if (!list_empty(&vma->exec_list))
4628 if (!i915_is_ggtt(vm))
4629 i915_ppgtt_put(i915_vm_to_ppgtt(vm));
4631 list_del(&vma->vma_link);
4637 i915_gem_stop_ringbuffers(struct drm_device *dev)
4639 struct drm_i915_private *dev_priv = dev->dev_private;
4640 struct intel_engine_cs *ring;
4643 for_each_ring(ring, dev_priv, i)
4644 dev_priv->gt.stop_ring(ring);
4648 i915_gem_suspend(struct drm_device *dev)
4650 struct drm_i915_private *dev_priv = dev->dev_private;
4653 mutex_lock(&dev->struct_mutex);
4654 if (dev_priv->ums.mm_suspended)
4657 ret = i915_gpu_idle(dev);
4661 i915_gem_retire_requests(dev);
4663 /* Under UMS, be paranoid and evict. */
4664 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4665 i915_gem_evict_everything(dev);
4667 i915_gem_stop_ringbuffers(dev);
4669 /* Hack! Don't let anybody do execbuf while we don't control the chip.
4670 * We need to replace this with a semaphore, or something.
4671 * And not confound ums.mm_suspended!
4673 dev_priv->ums.mm_suspended = !drm_core_check_feature(dev,
4675 mutex_unlock(&dev->struct_mutex);
4677 del_timer_sync(&dev_priv->gpu_error.hangcheck_timer);
4678 cancel_delayed_work_sync(&dev_priv->mm.retire_work);
4679 flush_delayed_work(&dev_priv->mm.idle_work);
4684 mutex_unlock(&dev->struct_mutex);
4688 int i915_gem_l3_remap(struct intel_engine_cs *ring, int slice)
4690 struct drm_device *dev = ring->dev;
4691 struct drm_i915_private *dev_priv = dev->dev_private;
4692 u32 reg_base = GEN7_L3LOG_BASE + (slice * 0x200);
4693 u32 *remap_info = dev_priv->l3_parity.remap_info[slice];
4696 if (!HAS_L3_DPF(dev) || !remap_info)
4699 ret = intel_ring_begin(ring, GEN7_L3LOG_SIZE / 4 * 3);
4704 * Note: We do not worry about the concurrent register cacheline hang
4705 * here because no other code should access these registers other than
4706 * at initialization time.
4708 for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) {
4709 intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
4710 intel_ring_emit(ring, reg_base + i);
4711 intel_ring_emit(ring, remap_info[i/4]);
4714 intel_ring_advance(ring);
4719 void i915_gem_init_swizzling(struct drm_device *dev)
4721 struct drm_i915_private *dev_priv = dev->dev_private;
4723 if (INTEL_INFO(dev)->gen < 5 ||
4724 dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE)
4727 I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) |
4728 DISP_TILE_SURFACE_SWIZZLING);
4733 I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL);
4735 I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB));
4736 else if (IS_GEN7(dev))
4737 I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB));
4738 else if (IS_GEN8(dev))
4739 I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_BDW));
4745 intel_enable_blt(struct drm_device *dev)
4750 /* The blitter was dysfunctional on early prototypes */
4751 if (IS_GEN6(dev) && dev->pdev->revision < 8) {
4752 DRM_INFO("BLT not supported on this pre-production hardware;"
4753 " graphics performance will be degraded.\n");
4760 static void init_unused_ring(struct drm_device *dev, u32 base)
4762 struct drm_i915_private *dev_priv = dev->dev_private;
4764 I915_WRITE(RING_CTL(base), 0);
4765 I915_WRITE(RING_HEAD(base), 0);
4766 I915_WRITE(RING_TAIL(base), 0);
4767 I915_WRITE(RING_START(base), 0);
4770 static void init_unused_rings(struct drm_device *dev)
4773 init_unused_ring(dev, PRB1_BASE);
4774 init_unused_ring(dev, SRB0_BASE);
4775 init_unused_ring(dev, SRB1_BASE);
4776 init_unused_ring(dev, SRB2_BASE);
4777 init_unused_ring(dev, SRB3_BASE);
4778 } else if (IS_GEN2(dev)) {
4779 init_unused_ring(dev, SRB0_BASE);
4780 init_unused_ring(dev, SRB1_BASE);
4781 } else if (IS_GEN3(dev)) {
4782 init_unused_ring(dev, PRB1_BASE);
4783 init_unused_ring(dev, PRB2_BASE);
4787 int i915_gem_init_rings(struct drm_device *dev)
4789 struct drm_i915_private *dev_priv = dev->dev_private;
4793 * At least 830 can leave some of the unused rings
4794 * "active" (ie. head != tail) after resume which
4795 * will prevent c3 entry. Makes sure all unused rings
4798 init_unused_rings(dev);
4800 ret = intel_init_render_ring_buffer(dev);
4805 ret = intel_init_bsd_ring_buffer(dev);
4807 goto cleanup_render_ring;
4810 if (intel_enable_blt(dev)) {
4811 ret = intel_init_blt_ring_buffer(dev);
4813 goto cleanup_bsd_ring;
4816 if (HAS_VEBOX(dev)) {
4817 ret = intel_init_vebox_ring_buffer(dev);
4819 goto cleanup_blt_ring;
4822 if (HAS_BSD2(dev)) {
4823 ret = intel_init_bsd2_ring_buffer(dev);
4825 goto cleanup_vebox_ring;
4828 ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000));
4830 goto cleanup_bsd2_ring;
4835 intel_cleanup_ring_buffer(&dev_priv->ring[VCS2]);
4837 intel_cleanup_ring_buffer(&dev_priv->ring[VECS]);
4839 intel_cleanup_ring_buffer(&dev_priv->ring[BCS]);
4841 intel_cleanup_ring_buffer(&dev_priv->ring[VCS]);
4842 cleanup_render_ring:
4843 intel_cleanup_ring_buffer(&dev_priv->ring[RCS]);
4849 i915_gem_init_hw(struct drm_device *dev)
4851 struct drm_i915_private *dev_priv = dev->dev_private;
4854 if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt())
4857 if (dev_priv->ellc_size)
4858 I915_WRITE(HSW_IDICR, I915_READ(HSW_IDICR) | IDIHASHMSK(0xf));
4860 if (IS_HASWELL(dev))
4861 I915_WRITE(MI_PREDICATE_RESULT_2, IS_HSW_GT3(dev) ?
4862 LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED);
4864 if (HAS_PCH_NOP(dev)) {
4865 if (IS_IVYBRIDGE(dev)) {
4866 u32 temp = I915_READ(GEN7_MSG_CTL);
4867 temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK);
4868 I915_WRITE(GEN7_MSG_CTL, temp);
4869 } else if (INTEL_INFO(dev)->gen >= 7) {
4870 u32 temp = I915_READ(HSW_NDE_RSTWRN_OPT);
4871 temp &= ~RESET_PCH_HANDSHAKE_ENABLE;
4872 I915_WRITE(HSW_NDE_RSTWRN_OPT, temp);
4876 i915_gem_init_swizzling(dev);
4878 ret = dev_priv->gt.init_rings(dev);
4882 for (i = 0; i < NUM_L3_SLICES(dev); i++)
4883 i915_gem_l3_remap(&dev_priv->ring[RCS], i);
4886 * XXX: Contexts should only be initialized once. Doing a switch to the
4887 * default context switch however is something we'd like to do after
4888 * reset or thaw (the latter may not actually be necessary for HW, but
4889 * goes with our code better). Context switching requires rings (for
4890 * the do_switch), but before enabling PPGTT. So don't move this.
4892 ret = i915_gem_context_enable(dev_priv);
4893 if (ret && ret != -EIO) {
4894 DRM_ERROR("Context enable failed %d\n", ret);
4895 i915_gem_cleanup_ringbuffer(dev);
4900 ret = i915_ppgtt_init_hw(dev);
4901 if (ret && ret != -EIO) {
4902 DRM_ERROR("PPGTT enable failed %d\n", ret);
4903 i915_gem_cleanup_ringbuffer(dev);
4909 int i915_gem_init(struct drm_device *dev)
4911 struct drm_i915_private *dev_priv = dev->dev_private;
4914 i915.enable_execlists = intel_sanitize_enable_execlists(dev,
4915 i915.enable_execlists);
4917 mutex_lock(&dev->struct_mutex);
4919 if (IS_VALLEYVIEW(dev)) {
4920 /* VLVA0 (potential hack), BIOS isn't actually waking us */
4921 I915_WRITE(VLV_GTLC_WAKE_CTRL, VLV_GTLC_ALLOWWAKEREQ);
4922 if (wait_for((I915_READ(VLV_GTLC_PW_STATUS) &
4923 VLV_GTLC_ALLOWWAKEACK), 10))
4924 DRM_DEBUG_DRIVER("allow wake ack timed out\n");
4927 if (!i915.enable_execlists) {
4928 dev_priv->gt.do_execbuf = i915_gem_ringbuffer_submission;
4929 dev_priv->gt.init_rings = i915_gem_init_rings;
4930 dev_priv->gt.cleanup_ring = intel_cleanup_ring_buffer;
4931 dev_priv->gt.stop_ring = intel_stop_ring_buffer;
4933 dev_priv->gt.do_execbuf = intel_execlists_submission;
4934 dev_priv->gt.init_rings = intel_logical_rings_init;
4935 dev_priv->gt.cleanup_ring = intel_logical_ring_cleanup;
4936 dev_priv->gt.stop_ring = intel_logical_ring_stop;
4939 ret = i915_gem_init_userptr(dev);
4941 mutex_unlock(&dev->struct_mutex);
4945 i915_gem_init_global_gtt(dev);
4947 ret = i915_gem_context_init(dev);
4949 mutex_unlock(&dev->struct_mutex);
4953 ret = i915_gem_init_hw(dev);
4955 /* Allow ring initialisation to fail by marking the GPU as
4956 * wedged. But we only want to do this where the GPU is angry,
4957 * for all other failure, such as an allocation failure, bail.
4959 DRM_ERROR("Failed to initialize GPU, declaring it wedged\n");
4960 atomic_set_mask(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
4963 mutex_unlock(&dev->struct_mutex);
4969 i915_gem_cleanup_ringbuffer(struct drm_device *dev)
4971 struct drm_i915_private *dev_priv = dev->dev_private;
4972 struct intel_engine_cs *ring;
4975 for_each_ring(ring, dev_priv, i)
4976 dev_priv->gt.cleanup_ring(ring);
4980 i915_gem_lastclose(struct drm_device *dev)
4984 if (drm_core_check_feature(dev, DRIVER_MODESET))
4987 ret = i915_gem_suspend(dev);
4989 DRM_ERROR("failed to idle hardware: %d\n", ret);
4993 init_ring_lists(struct intel_engine_cs *ring)
4995 INIT_LIST_HEAD(&ring->active_list);
4996 INIT_LIST_HEAD(&ring->request_list);
4999 void i915_init_vm(struct drm_i915_private *dev_priv,
5000 struct i915_address_space *vm)
5002 if (!i915_is_ggtt(vm))
5003 drm_mm_init(&vm->mm, vm->start, vm->total);
5004 vm->dev = dev_priv->dev;
5005 INIT_LIST_HEAD(&vm->active_list);
5006 INIT_LIST_HEAD(&vm->inactive_list);
5007 INIT_LIST_HEAD(&vm->global_link);
5008 list_add_tail(&vm->global_link, &dev_priv->vm_list);
5012 i915_gem_load(struct drm_device *dev)
5014 struct drm_i915_private *dev_priv = dev->dev_private;
5018 kmem_cache_create("i915_gem_object",
5019 sizeof(struct drm_i915_gem_object), 0,
5023 INIT_LIST_HEAD(&dev_priv->vm_list);
5024 i915_init_vm(dev_priv, &dev_priv->gtt.base);
5026 INIT_LIST_HEAD(&dev_priv->context_list);
5027 INIT_LIST_HEAD(&dev_priv->mm.unbound_list);
5028 INIT_LIST_HEAD(&dev_priv->mm.bound_list);
5029 INIT_LIST_HEAD(&dev_priv->mm.fence_list);
5030 for (i = 0; i < I915_NUM_RINGS; i++)
5031 init_ring_lists(&dev_priv->ring[i]);
5032 for (i = 0; i < I915_MAX_NUM_FENCES; i++)
5033 INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list);
5034 INIT_DELAYED_WORK(&dev_priv->mm.retire_work,
5035 i915_gem_retire_work_handler);
5036 INIT_DELAYED_WORK(&dev_priv->mm.idle_work,
5037 i915_gem_idle_work_handler);
5038 init_waitqueue_head(&dev_priv->gpu_error.reset_queue);
5040 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
5041 if (!drm_core_check_feature(dev, DRIVER_MODESET) && IS_GEN3(dev)) {
5042 I915_WRITE(MI_ARB_STATE,
5043 _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE));
5046 dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL;
5048 /* Old X drivers will take 0-2 for front, back, depth buffers */
5049 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5050 dev_priv->fence_reg_start = 3;
5052 if (INTEL_INFO(dev)->gen >= 7 && !IS_VALLEYVIEW(dev))
5053 dev_priv->num_fence_regs = 32;
5054 else if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
5055 dev_priv->num_fence_regs = 16;
5057 dev_priv->num_fence_regs = 8;
5059 /* Initialize fence registers to zero */
5060 INIT_LIST_HEAD(&dev_priv->mm.fence_list);
5061 i915_gem_restore_fences(dev);
5063 i915_gem_detect_bit_6_swizzle(dev);
5064 init_waitqueue_head(&dev_priv->pending_flip_queue);
5066 dev_priv->mm.interruptible = true;
5068 dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan;
5069 dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count;
5070 dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS;
5071 register_shrinker(&dev_priv->mm.shrinker);
5073 dev_priv->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom;
5074 register_oom_notifier(&dev_priv->mm.oom_notifier);
5076 mutex_init(&dev_priv->fb_tracking.lock);
5079 void i915_gem_release(struct drm_device *dev, struct drm_file *file)
5081 struct drm_i915_file_private *file_priv = file->driver_priv;
5083 cancel_delayed_work_sync(&file_priv->mm.idle_work);
5085 /* Clean up our request list when the client is going away, so that
5086 * later retire_requests won't dereference our soon-to-be-gone
5089 spin_lock(&file_priv->mm.lock);
5090 while (!list_empty(&file_priv->mm.request_list)) {
5091 struct drm_i915_gem_request *request;
5093 request = list_first_entry(&file_priv->mm.request_list,
5094 struct drm_i915_gem_request,
5096 list_del(&request->client_list);
5097 request->file_priv = NULL;
5099 spin_unlock(&file_priv->mm.lock);
5103 i915_gem_file_idle_work_handler(struct work_struct *work)
5105 struct drm_i915_file_private *file_priv =
5106 container_of(work, typeof(*file_priv), mm.idle_work.work);
5108 atomic_set(&file_priv->rps_wait_boost, false);
5111 int i915_gem_open(struct drm_device *dev, struct drm_file *file)
5113 struct drm_i915_file_private *file_priv;
5116 DRM_DEBUG_DRIVER("\n");
5118 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
5122 file->driver_priv = file_priv;
5123 file_priv->dev_priv = dev->dev_private;
5124 file_priv->file = file;
5126 spin_lock_init(&file_priv->mm.lock);
5127 INIT_LIST_HEAD(&file_priv->mm.request_list);
5128 INIT_DELAYED_WORK(&file_priv->mm.idle_work,
5129 i915_gem_file_idle_work_handler);
5131 ret = i915_gem_context_open(dev, file);
5139 * i915_gem_track_fb - update frontbuffer tracking
5140 * old: current GEM buffer for the frontbuffer slots
5141 * new: new GEM buffer for the frontbuffer slots
5142 * frontbuffer_bits: bitmask of frontbuffer slots
5144 * This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them
5145 * from @old and setting them in @new. Both @old and @new can be NULL.
5147 void i915_gem_track_fb(struct drm_i915_gem_object *old,
5148 struct drm_i915_gem_object *new,
5149 unsigned frontbuffer_bits)
5152 WARN_ON(!mutex_is_locked(&old->base.dev->struct_mutex));
5153 WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits));
5154 old->frontbuffer_bits &= ~frontbuffer_bits;
5158 WARN_ON(!mutex_is_locked(&new->base.dev->struct_mutex));
5159 WARN_ON(new->frontbuffer_bits & frontbuffer_bits);
5160 new->frontbuffer_bits |= frontbuffer_bits;
5164 static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task)
5166 if (!mutex_is_locked(mutex))
5169 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES)
5170 return mutex->owner == task;
5172 /* Since UP may be pre-empted, we cannot assume that we own the lock */
5177 static bool i915_gem_shrinker_lock(struct drm_device *dev, bool *unlock)
5179 if (!mutex_trylock(&dev->struct_mutex)) {
5180 if (!mutex_is_locked_by(&dev->struct_mutex, current))
5183 if (to_i915(dev)->mm.shrinker_no_lock_stealing)
5193 static int num_vma_bound(struct drm_i915_gem_object *obj)
5195 struct i915_vma *vma;
5198 list_for_each_entry(vma, &obj->vma_list, vma_link)
5199 if (drm_mm_node_allocated(&vma->node))
5205 static unsigned long
5206 i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc)
5208 struct drm_i915_private *dev_priv =
5209 container_of(shrinker, struct drm_i915_private, mm.shrinker);
5210 struct drm_device *dev = dev_priv->dev;
5211 struct drm_i915_gem_object *obj;
5212 unsigned long count;
5215 if (!i915_gem_shrinker_lock(dev, &unlock))
5219 list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list)
5220 if (obj->pages_pin_count == 0)
5221 count += obj->base.size >> PAGE_SHIFT;
5223 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
5224 if (!i915_gem_obj_is_pinned(obj) &&
5225 obj->pages_pin_count == num_vma_bound(obj))
5226 count += obj->base.size >> PAGE_SHIFT;
5230 mutex_unlock(&dev->struct_mutex);
5235 /* All the new VM stuff */
5236 unsigned long i915_gem_obj_offset(struct drm_i915_gem_object *o,
5237 struct i915_address_space *vm)
5239 struct drm_i915_private *dev_priv = o->base.dev->dev_private;
5240 struct i915_vma *vma;
5242 WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base);
5244 list_for_each_entry(vma, &o->vma_list, vma_link) {
5246 return vma->node.start;
5249 WARN(1, "%s vma for this object not found.\n",
5250 i915_is_ggtt(vm) ? "global" : "ppgtt");
5254 bool i915_gem_obj_bound(struct drm_i915_gem_object *o,
5255 struct i915_address_space *vm)
5257 struct i915_vma *vma;
5259 list_for_each_entry(vma, &o->vma_list, vma_link)
5260 if (vma->vm == vm && drm_mm_node_allocated(&vma->node))
5266 bool i915_gem_obj_bound_any(struct drm_i915_gem_object *o)
5268 struct i915_vma *vma;
5270 list_for_each_entry(vma, &o->vma_list, vma_link)
5271 if (drm_mm_node_allocated(&vma->node))
5277 unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o,
5278 struct i915_address_space *vm)
5280 struct drm_i915_private *dev_priv = o->base.dev->dev_private;
5281 struct i915_vma *vma;
5283 WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base);
5285 BUG_ON(list_empty(&o->vma_list));
5287 list_for_each_entry(vma, &o->vma_list, vma_link)
5289 return vma->node.size;
5294 static unsigned long
5295 i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc)
5297 struct drm_i915_private *dev_priv =
5298 container_of(shrinker, struct drm_i915_private, mm.shrinker);
5299 struct drm_device *dev = dev_priv->dev;
5300 unsigned long freed;
5303 if (!i915_gem_shrinker_lock(dev, &unlock))
5306 freed = i915_gem_shrink(dev_priv,
5309 I915_SHRINK_UNBOUND |
5310 I915_SHRINK_PURGEABLE);
5311 if (freed < sc->nr_to_scan)
5312 freed += i915_gem_shrink(dev_priv,
5313 sc->nr_to_scan - freed,
5315 I915_SHRINK_UNBOUND);
5317 mutex_unlock(&dev->struct_mutex);
5323 i915_gem_shrinker_oom(struct notifier_block *nb, unsigned long event, void *ptr)
5325 struct drm_i915_private *dev_priv =
5326 container_of(nb, struct drm_i915_private, mm.oom_notifier);
5327 struct drm_device *dev = dev_priv->dev;
5328 struct drm_i915_gem_object *obj;
5329 unsigned long timeout = msecs_to_jiffies(5000) + 1;
5330 unsigned long pinned, bound, unbound, freed_pages;
5331 bool was_interruptible;
5334 while (!i915_gem_shrinker_lock(dev, &unlock) && --timeout) {
5335 schedule_timeout_killable(1);
5336 if (fatal_signal_pending(current))
5340 pr_err("Unable to purge GPU memory due lock contention.\n");
5344 was_interruptible = dev_priv->mm.interruptible;
5345 dev_priv->mm.interruptible = false;
5347 freed_pages = i915_gem_shrink_all(dev_priv);
5349 dev_priv->mm.interruptible = was_interruptible;
5351 /* Because we may be allocating inside our own driver, we cannot
5352 * assert that there are no objects with pinned pages that are not
5353 * being pointed to by hardware.
5355 unbound = bound = pinned = 0;
5356 list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list) {
5357 if (!obj->base.filp) /* not backed by a freeable object */
5360 if (obj->pages_pin_count)
5361 pinned += obj->base.size;
5363 unbound += obj->base.size;
5365 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
5366 if (!obj->base.filp)
5369 if (obj->pages_pin_count)
5370 pinned += obj->base.size;
5372 bound += obj->base.size;
5376 mutex_unlock(&dev->struct_mutex);
5378 if (freed_pages || unbound || bound)
5379 pr_info("Purging GPU memory, %lu bytes freed, %lu bytes still pinned.\n",
5380 freed_pages << PAGE_SHIFT, pinned);
5381 if (unbound || bound)
5382 pr_err("%lu and %lu bytes still available in the "
5383 "bound and unbound GPU page lists.\n",
5386 *(unsigned long *)ptr += freed_pages;
5390 struct i915_vma *i915_gem_obj_to_ggtt(struct drm_i915_gem_object *obj)
5392 struct i915_vma *vma;
5394 vma = list_first_entry(&obj->vma_list, typeof(*vma), vma_link);
5395 if (vma->vm != i915_obj_to_ggtt(obj))