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);
43 static __must_check int
44 i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj,
47 i915_gem_object_retire(struct drm_i915_gem_object *obj);
49 static void i915_gem_write_fence(struct drm_device *dev, int reg,
50 struct drm_i915_gem_object *obj);
51 static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj,
52 struct drm_i915_fence_reg *fence,
55 static unsigned long i915_gem_shrinker_count(struct shrinker *shrinker,
56 struct shrink_control *sc);
57 static unsigned long i915_gem_shrinker_scan(struct shrinker *shrinker,
58 struct shrink_control *sc);
59 static int i915_gem_shrinker_oom(struct notifier_block *nb,
62 static unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv);
64 static bool cpu_cache_is_coherent(struct drm_device *dev,
65 enum i915_cache_level level)
67 return HAS_LLC(dev) || level != I915_CACHE_NONE;
70 static bool cpu_write_needs_clflush(struct drm_i915_gem_object *obj)
72 if (!cpu_cache_is_coherent(obj->base.dev, obj->cache_level))
75 return obj->pin_display;
78 static inline void i915_gem_object_fence_lost(struct drm_i915_gem_object *obj)
81 i915_gem_release_mmap(obj);
83 /* As we do not have an associated fence register, we will force
84 * a tiling change if we ever need to acquire one.
86 obj->fence_dirty = false;
87 obj->fence_reg = I915_FENCE_REG_NONE;
90 /* some bookkeeping */
91 static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv,
94 spin_lock(&dev_priv->mm.object_stat_lock);
95 dev_priv->mm.object_count++;
96 dev_priv->mm.object_memory += size;
97 spin_unlock(&dev_priv->mm.object_stat_lock);
100 static void i915_gem_info_remove_obj(struct drm_i915_private *dev_priv,
103 spin_lock(&dev_priv->mm.object_stat_lock);
104 dev_priv->mm.object_count--;
105 dev_priv->mm.object_memory -= size;
106 spin_unlock(&dev_priv->mm.object_stat_lock);
110 i915_gem_wait_for_error(struct i915_gpu_error *error)
114 #define EXIT_COND (!i915_reset_in_progress(error) || \
115 i915_terminally_wedged(error))
120 * Only wait 10 seconds for the gpu reset to complete to avoid hanging
121 * userspace. If it takes that long something really bad is going on and
122 * we should simply try to bail out and fail as gracefully as possible.
124 ret = wait_event_interruptible_timeout(error->reset_queue,
128 DRM_ERROR("Timed out waiting for the gpu reset to complete\n");
130 } else if (ret < 0) {
138 int i915_mutex_lock_interruptible(struct drm_device *dev)
140 struct drm_i915_private *dev_priv = dev->dev_private;
143 ret = i915_gem_wait_for_error(&dev_priv->gpu_error);
147 ret = mutex_lock_interruptible(&dev->struct_mutex);
151 WARN_ON(i915_verify_lists(dev));
156 i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
157 struct drm_file *file)
159 struct drm_i915_private *dev_priv = dev->dev_private;
160 struct drm_i915_gem_get_aperture *args = data;
161 struct drm_i915_gem_object *obj;
165 mutex_lock(&dev->struct_mutex);
166 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
167 if (i915_gem_obj_is_pinned(obj))
168 pinned += i915_gem_obj_ggtt_size(obj);
169 mutex_unlock(&dev->struct_mutex);
171 args->aper_size = dev_priv->gtt.base.total;
172 args->aper_available_size = args->aper_size - pinned;
178 i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj)
180 struct address_space *mapping = file_inode(obj->base.filp)->i_mapping;
181 char *vaddr = obj->phys_handle->vaddr;
183 struct scatterlist *sg;
186 if (WARN_ON(i915_gem_object_needs_bit17_swizzle(obj)))
189 for (i = 0; i < obj->base.size / PAGE_SIZE; i++) {
193 page = shmem_read_mapping_page(mapping, i);
195 return PTR_ERR(page);
197 src = kmap_atomic(page);
198 memcpy(vaddr, src, PAGE_SIZE);
199 drm_clflush_virt_range(vaddr, PAGE_SIZE);
202 page_cache_release(page);
206 i915_gem_chipset_flush(obj->base.dev);
208 st = kmalloc(sizeof(*st), GFP_KERNEL);
212 if (sg_alloc_table(st, 1, GFP_KERNEL)) {
219 sg->length = obj->base.size;
221 sg_dma_address(sg) = obj->phys_handle->busaddr;
222 sg_dma_len(sg) = obj->base.size;
225 obj->has_dma_mapping = true;
230 i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj)
234 BUG_ON(obj->madv == __I915_MADV_PURGED);
236 ret = i915_gem_object_set_to_cpu_domain(obj, true);
238 /* In the event of a disaster, abandon all caches and
241 WARN_ON(ret != -EIO);
242 obj->base.read_domains = obj->base.write_domain = I915_GEM_DOMAIN_CPU;
245 if (obj->madv == I915_MADV_DONTNEED)
249 struct address_space *mapping = file_inode(obj->base.filp)->i_mapping;
250 char *vaddr = obj->phys_handle->vaddr;
253 for (i = 0; i < obj->base.size / PAGE_SIZE; i++) {
257 page = shmem_read_mapping_page(mapping, i);
261 dst = kmap_atomic(page);
262 drm_clflush_virt_range(vaddr, PAGE_SIZE);
263 memcpy(dst, vaddr, PAGE_SIZE);
266 set_page_dirty(page);
267 if (obj->madv == I915_MADV_WILLNEED)
268 mark_page_accessed(page);
269 page_cache_release(page);
275 sg_free_table(obj->pages);
278 obj->has_dma_mapping = false;
282 i915_gem_object_release_phys(struct drm_i915_gem_object *obj)
284 drm_pci_free(obj->base.dev, obj->phys_handle);
287 static const struct drm_i915_gem_object_ops i915_gem_phys_ops = {
288 .get_pages = i915_gem_object_get_pages_phys,
289 .put_pages = i915_gem_object_put_pages_phys,
290 .release = i915_gem_object_release_phys,
294 drop_pages(struct drm_i915_gem_object *obj)
296 struct i915_vma *vma, *next;
299 drm_gem_object_reference(&obj->base);
300 list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link)
301 if (i915_vma_unbind(vma))
304 ret = i915_gem_object_put_pages(obj);
305 drm_gem_object_unreference(&obj->base);
311 i915_gem_object_attach_phys(struct drm_i915_gem_object *obj,
314 drm_dma_handle_t *phys;
317 if (obj->phys_handle) {
318 if ((unsigned long)obj->phys_handle->vaddr & (align -1))
324 if (obj->madv != I915_MADV_WILLNEED)
327 if (obj->base.filp == NULL)
330 ret = drop_pages(obj);
334 /* create a new object */
335 phys = drm_pci_alloc(obj->base.dev, obj->base.size, align);
339 obj->phys_handle = phys;
340 obj->ops = &i915_gem_phys_ops;
342 return i915_gem_object_get_pages(obj);
346 i915_gem_phys_pwrite(struct drm_i915_gem_object *obj,
347 struct drm_i915_gem_pwrite *args,
348 struct drm_file *file_priv)
350 struct drm_device *dev = obj->base.dev;
351 void *vaddr = obj->phys_handle->vaddr + args->offset;
352 char __user *user_data = to_user_ptr(args->data_ptr);
355 /* We manually control the domain here and pretend that it
356 * remains coherent i.e. in the GTT domain, like shmem_pwrite.
358 ret = i915_gem_object_wait_rendering(obj, false);
362 if (__copy_from_user_inatomic_nocache(vaddr, user_data, args->size)) {
363 unsigned long unwritten;
365 /* The physical object once assigned is fixed for the lifetime
366 * of the obj, so we can safely drop the lock and continue
369 mutex_unlock(&dev->struct_mutex);
370 unwritten = copy_from_user(vaddr, user_data, args->size);
371 mutex_lock(&dev->struct_mutex);
376 drm_clflush_virt_range(vaddr, args->size);
377 i915_gem_chipset_flush(dev);
381 void *i915_gem_object_alloc(struct drm_device *dev)
383 struct drm_i915_private *dev_priv = dev->dev_private;
384 return kmem_cache_zalloc(dev_priv->slab, GFP_KERNEL);
387 void i915_gem_object_free(struct drm_i915_gem_object *obj)
389 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
390 kmem_cache_free(dev_priv->slab, obj);
394 i915_gem_create(struct drm_file *file,
395 struct drm_device *dev,
399 struct drm_i915_gem_object *obj;
403 size = roundup(size, PAGE_SIZE);
407 /* Allocate the new object */
408 obj = i915_gem_alloc_object(dev, size);
412 ret = drm_gem_handle_create(file, &obj->base, &handle);
413 /* drop reference from allocate - handle holds it now */
414 drm_gem_object_unreference_unlocked(&obj->base);
423 i915_gem_dumb_create(struct drm_file *file,
424 struct drm_device *dev,
425 struct drm_mode_create_dumb *args)
427 /* have to work out size/pitch and return them */
428 args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 64);
429 args->size = args->pitch * args->height;
430 return i915_gem_create(file, dev,
431 args->size, &args->handle);
435 * Creates a new mm object and returns a handle to it.
438 i915_gem_create_ioctl(struct drm_device *dev, void *data,
439 struct drm_file *file)
441 struct drm_i915_gem_create *args = data;
443 return i915_gem_create(file, dev,
444 args->size, &args->handle);
448 __copy_to_user_swizzled(char __user *cpu_vaddr,
449 const char *gpu_vaddr, int gpu_offset,
452 int ret, cpu_offset = 0;
455 int cacheline_end = ALIGN(gpu_offset + 1, 64);
456 int this_length = min(cacheline_end - gpu_offset, length);
457 int swizzled_gpu_offset = gpu_offset ^ 64;
459 ret = __copy_to_user(cpu_vaddr + cpu_offset,
460 gpu_vaddr + swizzled_gpu_offset,
465 cpu_offset += this_length;
466 gpu_offset += this_length;
467 length -= this_length;
474 __copy_from_user_swizzled(char *gpu_vaddr, int gpu_offset,
475 const char __user *cpu_vaddr,
478 int ret, cpu_offset = 0;
481 int cacheline_end = ALIGN(gpu_offset + 1, 64);
482 int this_length = min(cacheline_end - gpu_offset, length);
483 int swizzled_gpu_offset = gpu_offset ^ 64;
485 ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset,
486 cpu_vaddr + cpu_offset,
491 cpu_offset += this_length;
492 gpu_offset += this_length;
493 length -= this_length;
500 * Pins the specified object's pages and synchronizes the object with
501 * GPU accesses. Sets needs_clflush to non-zero if the caller should
502 * flush the object from the CPU cache.
504 int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj,
514 if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) {
515 /* If we're not in the cpu read domain, set ourself into the gtt
516 * read domain and manually flush cachelines (if required). This
517 * optimizes for the case when the gpu will dirty the data
518 * anyway again before the next pread happens. */
519 *needs_clflush = !cpu_cache_is_coherent(obj->base.dev,
521 ret = i915_gem_object_wait_rendering(obj, true);
525 i915_gem_object_retire(obj);
528 ret = i915_gem_object_get_pages(obj);
532 i915_gem_object_pin_pages(obj);
537 /* Per-page copy function for the shmem pread fastpath.
538 * Flushes invalid cachelines before reading the target if
539 * needs_clflush is set. */
541 shmem_pread_fast(struct page *page, int shmem_page_offset, int page_length,
542 char __user *user_data,
543 bool page_do_bit17_swizzling, bool needs_clflush)
548 if (unlikely(page_do_bit17_swizzling))
551 vaddr = kmap_atomic(page);
553 drm_clflush_virt_range(vaddr + shmem_page_offset,
555 ret = __copy_to_user_inatomic(user_data,
556 vaddr + shmem_page_offset,
558 kunmap_atomic(vaddr);
560 return ret ? -EFAULT : 0;
564 shmem_clflush_swizzled_range(char *addr, unsigned long length,
567 if (unlikely(swizzled)) {
568 unsigned long start = (unsigned long) addr;
569 unsigned long end = (unsigned long) addr + length;
571 /* For swizzling simply ensure that we always flush both
572 * channels. Lame, but simple and it works. Swizzled
573 * pwrite/pread is far from a hotpath - current userspace
574 * doesn't use it at all. */
575 start = round_down(start, 128);
576 end = round_up(end, 128);
578 drm_clflush_virt_range((void *)start, end - start);
580 drm_clflush_virt_range(addr, length);
585 /* Only difference to the fast-path function is that this can handle bit17
586 * and uses non-atomic copy and kmap functions. */
588 shmem_pread_slow(struct page *page, int shmem_page_offset, int page_length,
589 char __user *user_data,
590 bool page_do_bit17_swizzling, bool needs_clflush)
597 shmem_clflush_swizzled_range(vaddr + shmem_page_offset,
599 page_do_bit17_swizzling);
601 if (page_do_bit17_swizzling)
602 ret = __copy_to_user_swizzled(user_data,
603 vaddr, shmem_page_offset,
606 ret = __copy_to_user(user_data,
607 vaddr + shmem_page_offset,
611 return ret ? - EFAULT : 0;
615 i915_gem_shmem_pread(struct drm_device *dev,
616 struct drm_i915_gem_object *obj,
617 struct drm_i915_gem_pread *args,
618 struct drm_file *file)
620 char __user *user_data;
623 int shmem_page_offset, page_length, ret = 0;
624 int obj_do_bit17_swizzling, page_do_bit17_swizzling;
626 int needs_clflush = 0;
627 struct sg_page_iter sg_iter;
629 user_data = to_user_ptr(args->data_ptr);
632 obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
634 ret = i915_gem_obj_prepare_shmem_read(obj, &needs_clflush);
638 offset = args->offset;
640 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents,
641 offset >> PAGE_SHIFT) {
642 struct page *page = sg_page_iter_page(&sg_iter);
647 /* Operation in this page
649 * shmem_page_offset = offset within page in shmem file
650 * page_length = bytes to copy for this page
652 shmem_page_offset = offset_in_page(offset);
653 page_length = remain;
654 if ((shmem_page_offset + page_length) > PAGE_SIZE)
655 page_length = PAGE_SIZE - shmem_page_offset;
657 page_do_bit17_swizzling = obj_do_bit17_swizzling &&
658 (page_to_phys(page) & (1 << 17)) != 0;
660 ret = shmem_pread_fast(page, shmem_page_offset, page_length,
661 user_data, page_do_bit17_swizzling,
666 mutex_unlock(&dev->struct_mutex);
668 if (likely(!i915.prefault_disable) && !prefaulted) {
669 ret = fault_in_multipages_writeable(user_data, remain);
670 /* Userspace is tricking us, but we've already clobbered
671 * its pages with the prefault and promised to write the
672 * data up to the first fault. Hence ignore any errors
673 * and just continue. */
678 ret = shmem_pread_slow(page, shmem_page_offset, page_length,
679 user_data, page_do_bit17_swizzling,
682 mutex_lock(&dev->struct_mutex);
688 remain -= page_length;
689 user_data += page_length;
690 offset += page_length;
694 i915_gem_object_unpin_pages(obj);
700 * Reads data from the object referenced by handle.
702 * On error, the contents of *data are undefined.
705 i915_gem_pread_ioctl(struct drm_device *dev, void *data,
706 struct drm_file *file)
708 struct drm_i915_gem_pread *args = data;
709 struct drm_i915_gem_object *obj;
715 if (!access_ok(VERIFY_WRITE,
716 to_user_ptr(args->data_ptr),
720 ret = i915_mutex_lock_interruptible(dev);
724 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
725 if (&obj->base == NULL) {
730 /* Bounds check source. */
731 if (args->offset > obj->base.size ||
732 args->size > obj->base.size - args->offset) {
737 /* prime objects have no backing filp to GEM pread/pwrite
740 if (!obj->base.filp) {
745 trace_i915_gem_object_pread(obj, args->offset, args->size);
747 ret = i915_gem_shmem_pread(dev, obj, args, file);
750 drm_gem_object_unreference(&obj->base);
752 mutex_unlock(&dev->struct_mutex);
756 /* This is the fast write path which cannot handle
757 * page faults in the source data
761 fast_user_write(struct io_mapping *mapping,
762 loff_t page_base, int page_offset,
763 char __user *user_data,
766 void __iomem *vaddr_atomic;
768 unsigned long unwritten;
770 vaddr_atomic = io_mapping_map_atomic_wc(mapping, page_base);
771 /* We can use the cpu mem copy function because this is X86. */
772 vaddr = (void __force*)vaddr_atomic + page_offset;
773 unwritten = __copy_from_user_inatomic_nocache(vaddr,
775 io_mapping_unmap_atomic(vaddr_atomic);
780 * This is the fast pwrite path, where we copy the data directly from the
781 * user into the GTT, uncached.
784 i915_gem_gtt_pwrite_fast(struct drm_device *dev,
785 struct drm_i915_gem_object *obj,
786 struct drm_i915_gem_pwrite *args,
787 struct drm_file *file)
789 struct drm_i915_private *dev_priv = dev->dev_private;
791 loff_t offset, page_base;
792 char __user *user_data;
793 int page_offset, page_length, ret;
795 ret = i915_gem_obj_ggtt_pin(obj, 0, PIN_MAPPABLE | PIN_NONBLOCK);
799 ret = i915_gem_object_set_to_gtt_domain(obj, true);
803 ret = i915_gem_object_put_fence(obj);
807 user_data = to_user_ptr(args->data_ptr);
810 offset = i915_gem_obj_ggtt_offset(obj) + args->offset;
813 /* Operation in this page
815 * page_base = page offset within aperture
816 * page_offset = offset within page
817 * page_length = bytes to copy for this page
819 page_base = offset & PAGE_MASK;
820 page_offset = offset_in_page(offset);
821 page_length = remain;
822 if ((page_offset + remain) > PAGE_SIZE)
823 page_length = PAGE_SIZE - page_offset;
825 /* If we get a fault while copying data, then (presumably) our
826 * source page isn't available. Return the error and we'll
827 * retry in the slow path.
829 if (fast_user_write(dev_priv->gtt.mappable, page_base,
830 page_offset, user_data, page_length)) {
835 remain -= page_length;
836 user_data += page_length;
837 offset += page_length;
841 i915_gem_object_ggtt_unpin(obj);
846 /* Per-page copy function for the shmem pwrite fastpath.
847 * Flushes invalid cachelines before writing to the target if
848 * needs_clflush_before is set and flushes out any written cachelines after
849 * writing if needs_clflush is set. */
851 shmem_pwrite_fast(struct page *page, int shmem_page_offset, int page_length,
852 char __user *user_data,
853 bool page_do_bit17_swizzling,
854 bool needs_clflush_before,
855 bool needs_clflush_after)
860 if (unlikely(page_do_bit17_swizzling))
863 vaddr = kmap_atomic(page);
864 if (needs_clflush_before)
865 drm_clflush_virt_range(vaddr + shmem_page_offset,
867 ret = __copy_from_user_inatomic(vaddr + shmem_page_offset,
868 user_data, page_length);
869 if (needs_clflush_after)
870 drm_clflush_virt_range(vaddr + shmem_page_offset,
872 kunmap_atomic(vaddr);
874 return ret ? -EFAULT : 0;
877 /* Only difference to the fast-path function is that this can handle bit17
878 * and uses non-atomic copy and kmap functions. */
880 shmem_pwrite_slow(struct page *page, int shmem_page_offset, int page_length,
881 char __user *user_data,
882 bool page_do_bit17_swizzling,
883 bool needs_clflush_before,
884 bool needs_clflush_after)
890 if (unlikely(needs_clflush_before || page_do_bit17_swizzling))
891 shmem_clflush_swizzled_range(vaddr + shmem_page_offset,
893 page_do_bit17_swizzling);
894 if (page_do_bit17_swizzling)
895 ret = __copy_from_user_swizzled(vaddr, shmem_page_offset,
899 ret = __copy_from_user(vaddr + shmem_page_offset,
902 if (needs_clflush_after)
903 shmem_clflush_swizzled_range(vaddr + shmem_page_offset,
905 page_do_bit17_swizzling);
908 return ret ? -EFAULT : 0;
912 i915_gem_shmem_pwrite(struct drm_device *dev,
913 struct drm_i915_gem_object *obj,
914 struct drm_i915_gem_pwrite *args,
915 struct drm_file *file)
919 char __user *user_data;
920 int shmem_page_offset, page_length, ret = 0;
921 int obj_do_bit17_swizzling, page_do_bit17_swizzling;
922 int hit_slowpath = 0;
923 int needs_clflush_after = 0;
924 int needs_clflush_before = 0;
925 struct sg_page_iter sg_iter;
927 user_data = to_user_ptr(args->data_ptr);
930 obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
932 if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
933 /* If we're not in the cpu write domain, set ourself into the gtt
934 * write domain and manually flush cachelines (if required). This
935 * optimizes for the case when the gpu will use the data
936 * right away and we therefore have to clflush anyway. */
937 needs_clflush_after = cpu_write_needs_clflush(obj);
938 ret = i915_gem_object_wait_rendering(obj, false);
942 i915_gem_object_retire(obj);
944 /* Same trick applies to invalidate partially written cachelines read
946 if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0)
947 needs_clflush_before =
948 !cpu_cache_is_coherent(dev, obj->cache_level);
950 ret = i915_gem_object_get_pages(obj);
954 i915_gem_object_pin_pages(obj);
956 offset = args->offset;
959 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents,
960 offset >> PAGE_SHIFT) {
961 struct page *page = sg_page_iter_page(&sg_iter);
962 int partial_cacheline_write;
967 /* Operation in this page
969 * shmem_page_offset = offset within page in shmem file
970 * page_length = bytes to copy for this page
972 shmem_page_offset = offset_in_page(offset);
974 page_length = remain;
975 if ((shmem_page_offset + page_length) > PAGE_SIZE)
976 page_length = PAGE_SIZE - shmem_page_offset;
978 /* If we don't overwrite a cacheline completely we need to be
979 * careful to have up-to-date data by first clflushing. Don't
980 * overcomplicate things and flush the entire patch. */
981 partial_cacheline_write = needs_clflush_before &&
982 ((shmem_page_offset | page_length)
983 & (boot_cpu_data.x86_clflush_size - 1));
985 page_do_bit17_swizzling = obj_do_bit17_swizzling &&
986 (page_to_phys(page) & (1 << 17)) != 0;
988 ret = shmem_pwrite_fast(page, shmem_page_offset, page_length,
989 user_data, page_do_bit17_swizzling,
990 partial_cacheline_write,
991 needs_clflush_after);
996 mutex_unlock(&dev->struct_mutex);
997 ret = shmem_pwrite_slow(page, shmem_page_offset, page_length,
998 user_data, page_do_bit17_swizzling,
999 partial_cacheline_write,
1000 needs_clflush_after);
1002 mutex_lock(&dev->struct_mutex);
1008 remain -= page_length;
1009 user_data += page_length;
1010 offset += page_length;
1014 i915_gem_object_unpin_pages(obj);
1018 * Fixup: Flush cpu caches in case we didn't flush the dirty
1019 * cachelines in-line while writing and the object moved
1020 * out of the cpu write domain while we've dropped the lock.
1022 if (!needs_clflush_after &&
1023 obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
1024 if (i915_gem_clflush_object(obj, obj->pin_display))
1025 i915_gem_chipset_flush(dev);
1029 if (needs_clflush_after)
1030 i915_gem_chipset_flush(dev);
1036 * Writes data to the object referenced by handle.
1038 * On error, the contents of the buffer that were to be modified are undefined.
1041 i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
1042 struct drm_file *file)
1044 struct drm_i915_private *dev_priv = dev->dev_private;
1045 struct drm_i915_gem_pwrite *args = data;
1046 struct drm_i915_gem_object *obj;
1049 if (args->size == 0)
1052 if (!access_ok(VERIFY_READ,
1053 to_user_ptr(args->data_ptr),
1057 if (likely(!i915.prefault_disable)) {
1058 ret = fault_in_multipages_readable(to_user_ptr(args->data_ptr),
1064 intel_runtime_pm_get(dev_priv);
1066 ret = i915_mutex_lock_interruptible(dev);
1070 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
1071 if (&obj->base == NULL) {
1076 /* Bounds check destination. */
1077 if (args->offset > obj->base.size ||
1078 args->size > obj->base.size - args->offset) {
1083 /* prime objects have no backing filp to GEM pread/pwrite
1086 if (!obj->base.filp) {
1091 trace_i915_gem_object_pwrite(obj, args->offset, args->size);
1094 /* We can only do the GTT pwrite on untiled buffers, as otherwise
1095 * it would end up going through the fenced access, and we'll get
1096 * different detiling behavior between reading and writing.
1097 * pread/pwrite currently are reading and writing from the CPU
1098 * perspective, requiring manual detiling by the client.
1100 if (obj->tiling_mode == I915_TILING_NONE &&
1101 obj->base.write_domain != I915_GEM_DOMAIN_CPU &&
1102 cpu_write_needs_clflush(obj)) {
1103 ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file);
1104 /* Note that the gtt paths might fail with non-page-backed user
1105 * pointers (e.g. gtt mappings when moving data between
1106 * textures). Fallback to the shmem path in that case. */
1109 if (ret == -EFAULT || ret == -ENOSPC) {
1110 if (obj->phys_handle)
1111 ret = i915_gem_phys_pwrite(obj, args, file);
1113 ret = i915_gem_shmem_pwrite(dev, obj, args, file);
1117 drm_gem_object_unreference(&obj->base);
1119 mutex_unlock(&dev->struct_mutex);
1121 intel_runtime_pm_put(dev_priv);
1127 i915_gem_check_wedge(struct i915_gpu_error *error,
1130 if (i915_reset_in_progress(error)) {
1131 /* Non-interruptible callers can't handle -EAGAIN, hence return
1132 * -EIO unconditionally for these. */
1136 /* Recovery complete, but the reset failed ... */
1137 if (i915_terminally_wedged(error))
1141 * Check if GPU Reset is in progress - we need intel_ring_begin
1142 * to work properly to reinit the hw state while the gpu is
1143 * still marked as reset-in-progress. Handle this with a flag.
1145 if (!error->reload_in_reset)
1153 * Compare arbitrary request against outstanding lazy request. Emit on match.
1156 i915_gem_check_olr(struct drm_i915_gem_request *req)
1160 WARN_ON(!mutex_is_locked(&req->ring->dev->struct_mutex));
1163 if (req == req->ring->outstanding_lazy_request)
1164 ret = i915_add_request(req->ring);
1169 static void fake_irq(unsigned long data)
1171 wake_up_process((struct task_struct *)data);
1174 static bool missed_irq(struct drm_i915_private *dev_priv,
1175 struct intel_engine_cs *ring)
1177 return test_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings);
1180 static bool can_wait_boost(struct drm_i915_file_private *file_priv)
1182 if (file_priv == NULL)
1185 return !atomic_xchg(&file_priv->rps_wait_boost, true);
1189 * __i915_wait_request - wait until execution of request has finished
1191 * @reset_counter: reset sequence associated with the given request
1192 * @interruptible: do an interruptible wait (normally yes)
1193 * @timeout: in - how long to wait (NULL forever); out - how much time remaining
1195 * Note: It is of utmost importance that the passed in seqno and reset_counter
1196 * values have been read by the caller in an smp safe manner. Where read-side
1197 * locks are involved, it is sufficient to read the reset_counter before
1198 * unlocking the lock that protects the seqno. For lockless tricks, the
1199 * reset_counter _must_ be read before, and an appropriate smp_rmb must be
1202 * Returns 0 if the request was found within the alloted time. Else returns the
1203 * errno with remaining time filled in timeout argument.
1205 int __i915_wait_request(struct drm_i915_gem_request *req,
1206 unsigned reset_counter,
1209 struct drm_i915_file_private *file_priv)
1211 struct intel_engine_cs *ring = i915_gem_request_get_ring(req);
1212 struct drm_device *dev = ring->dev;
1213 struct drm_i915_private *dev_priv = dev->dev_private;
1214 const bool irq_test_in_progress =
1215 ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_ring_flag(ring);
1217 unsigned long timeout_expire;
1221 WARN(!intel_irqs_enabled(dev_priv), "IRQs disabled");
1223 if (i915_gem_request_completed(req, true))
1226 timeout_expire = timeout ?
1227 jiffies + nsecs_to_jiffies_timeout((u64)*timeout) : 0;
1229 if (INTEL_INFO(dev)->gen >= 6 && ring->id == RCS && can_wait_boost(file_priv)) {
1230 gen6_rps_boost(dev_priv);
1232 mod_delayed_work(dev_priv->wq,
1233 &file_priv->mm.idle_work,
1234 msecs_to_jiffies(100));
1237 if (!irq_test_in_progress && WARN_ON(!ring->irq_get(ring)))
1240 /* Record current time in case interrupted by signal, or wedged */
1241 trace_i915_gem_request_wait_begin(req);
1242 before = ktime_get_raw_ns();
1244 struct timer_list timer;
1246 prepare_to_wait(&ring->irq_queue, &wait,
1247 interruptible ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
1249 /* We need to check whether any gpu reset happened in between
1250 * the caller grabbing the seqno and now ... */
1251 if (reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter)) {
1252 /* ... but upgrade the -EAGAIN to an -EIO if the gpu
1253 * is truely gone. */
1254 ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible);
1260 if (i915_gem_request_completed(req, false)) {
1265 if (interruptible && signal_pending(current)) {
1270 if (timeout && time_after_eq(jiffies, timeout_expire)) {
1275 timer.function = NULL;
1276 if (timeout || missed_irq(dev_priv, ring)) {
1277 unsigned long expire;
1279 setup_timer_on_stack(&timer, fake_irq, (unsigned long)current);
1280 expire = missed_irq(dev_priv, ring) ? jiffies + 1 : timeout_expire;
1281 mod_timer(&timer, expire);
1286 if (timer.function) {
1287 del_singleshot_timer_sync(&timer);
1288 destroy_timer_on_stack(&timer);
1291 now = ktime_get_raw_ns();
1292 trace_i915_gem_request_wait_end(req);
1294 if (!irq_test_in_progress)
1295 ring->irq_put(ring);
1297 finish_wait(&ring->irq_queue, &wait);
1300 s64 tres = *timeout - (now - before);
1302 *timeout = tres < 0 ? 0 : tres;
1305 * Apparently ktime isn't accurate enough and occasionally has a
1306 * bit of mismatch in the jiffies<->nsecs<->ktime loop. So patch
1307 * things up to make the test happy. We allow up to 1 jiffy.
1309 * This is a regrssion from the timespec->ktime conversion.
1311 if (ret == -ETIME && *timeout < jiffies_to_usecs(1)*1000)
1319 * Waits for a request to be signaled, and cleans up the
1320 * request and object lists appropriately for that event.
1323 i915_wait_request(struct drm_i915_gem_request *req)
1325 struct drm_device *dev;
1326 struct drm_i915_private *dev_priv;
1328 unsigned reset_counter;
1331 BUG_ON(req == NULL);
1333 dev = req->ring->dev;
1334 dev_priv = dev->dev_private;
1335 interruptible = dev_priv->mm.interruptible;
1337 BUG_ON(!mutex_is_locked(&dev->struct_mutex));
1339 ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible);
1343 ret = i915_gem_check_olr(req);
1347 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
1348 i915_gem_request_reference(req);
1349 ret = __i915_wait_request(req, reset_counter,
1350 interruptible, NULL, NULL);
1351 i915_gem_request_unreference(req);
1356 i915_gem_object_wait_rendering__tail(struct drm_i915_gem_object *obj)
1361 /* Manually manage the write flush as we may have not yet
1362 * retired the buffer.
1364 * Note that the last_write_req is always the earlier of
1365 * the two (read/write) requests, so if we haved successfully waited,
1366 * we know we have passed the last write.
1368 i915_gem_request_assign(&obj->last_write_req, NULL);
1374 * Ensures that all rendering to the object has completed and the object is
1375 * safe to unbind from the GTT or access from the CPU.
1377 static __must_check int
1378 i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj,
1381 struct drm_i915_gem_request *req;
1384 req = readonly ? obj->last_write_req : obj->last_read_req;
1388 ret = i915_wait_request(req);
1392 return i915_gem_object_wait_rendering__tail(obj);
1395 /* A nonblocking variant of the above wait. This is a highly dangerous routine
1396 * as the object state may change during this call.
1398 static __must_check int
1399 i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj,
1400 struct drm_i915_file_private *file_priv,
1403 struct drm_i915_gem_request *req;
1404 struct drm_device *dev = obj->base.dev;
1405 struct drm_i915_private *dev_priv = dev->dev_private;
1406 unsigned reset_counter;
1409 BUG_ON(!mutex_is_locked(&dev->struct_mutex));
1410 BUG_ON(!dev_priv->mm.interruptible);
1412 req = readonly ? obj->last_write_req : obj->last_read_req;
1416 ret = i915_gem_check_wedge(&dev_priv->gpu_error, true);
1420 ret = i915_gem_check_olr(req);
1424 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
1425 i915_gem_request_reference(req);
1426 mutex_unlock(&dev->struct_mutex);
1427 ret = __i915_wait_request(req, reset_counter, true, NULL, file_priv);
1428 mutex_lock(&dev->struct_mutex);
1429 i915_gem_request_unreference(req);
1433 return i915_gem_object_wait_rendering__tail(obj);
1437 * Called when user space prepares to use an object with the CPU, either
1438 * through the mmap ioctl's mapping or a GTT mapping.
1441 i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
1442 struct drm_file *file)
1444 struct drm_i915_gem_set_domain *args = data;
1445 struct drm_i915_gem_object *obj;
1446 uint32_t read_domains = args->read_domains;
1447 uint32_t write_domain = args->write_domain;
1450 /* Only handle setting domains to types used by the CPU. */
1451 if (write_domain & I915_GEM_GPU_DOMAINS)
1454 if (read_domains & I915_GEM_GPU_DOMAINS)
1457 /* Having something in the write domain implies it's in the read
1458 * domain, and only that read domain. Enforce that in the request.
1460 if (write_domain != 0 && read_domains != write_domain)
1463 ret = i915_mutex_lock_interruptible(dev);
1467 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
1468 if (&obj->base == NULL) {
1473 /* Try to flush the object off the GPU without holding the lock.
1474 * We will repeat the flush holding the lock in the normal manner
1475 * to catch cases where we are gazumped.
1477 ret = i915_gem_object_wait_rendering__nonblocking(obj,
1483 if (read_domains & I915_GEM_DOMAIN_GTT)
1484 ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0);
1486 ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0);
1489 drm_gem_object_unreference(&obj->base);
1491 mutex_unlock(&dev->struct_mutex);
1496 * Called when user space has done writes to this buffer
1499 i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
1500 struct drm_file *file)
1502 struct drm_i915_gem_sw_finish *args = data;
1503 struct drm_i915_gem_object *obj;
1506 ret = i915_mutex_lock_interruptible(dev);
1510 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
1511 if (&obj->base == NULL) {
1516 /* Pinned buffers may be scanout, so flush the cache */
1517 if (obj->pin_display)
1518 i915_gem_object_flush_cpu_write_domain(obj);
1520 drm_gem_object_unreference(&obj->base);
1522 mutex_unlock(&dev->struct_mutex);
1527 * Maps the contents of an object, returning the address it is mapped
1530 * While the mapping holds a reference on the contents of the object, it doesn't
1531 * imply a ref on the object itself.
1535 * DRM driver writers who look a this function as an example for how to do GEM
1536 * mmap support, please don't implement mmap support like here. The modern way
1537 * to implement DRM mmap support is with an mmap offset ioctl (like
1538 * i915_gem_mmap_gtt) and then using the mmap syscall on the DRM fd directly.
1539 * That way debug tooling like valgrind will understand what's going on, hiding
1540 * the mmap call in a driver private ioctl will break that. The i915 driver only
1541 * does cpu mmaps this way because we didn't know better.
1544 i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
1545 struct drm_file *file)
1547 struct drm_i915_gem_mmap *args = data;
1548 struct drm_gem_object *obj;
1551 if (args->flags & ~(I915_MMAP_WC))
1554 if (args->flags & I915_MMAP_WC && !cpu_has_pat)
1557 obj = drm_gem_object_lookup(dev, file, args->handle);
1561 /* prime objects have no backing filp to GEM mmap
1565 drm_gem_object_unreference_unlocked(obj);
1569 addr = vm_mmap(obj->filp, 0, args->size,
1570 PROT_READ | PROT_WRITE, MAP_SHARED,
1572 if (args->flags & I915_MMAP_WC) {
1573 struct mm_struct *mm = current->mm;
1574 struct vm_area_struct *vma;
1576 down_write(&mm->mmap_sem);
1577 vma = find_vma(mm, addr);
1580 pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
1583 up_write(&mm->mmap_sem);
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);
2206 if (obj->tiling_mode != I915_TILING_NONE &&
2207 dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES)
2208 i915_gem_object_pin_pages(obj);
2214 for_each_sg_page(st->sgl, &sg_iter, st->nents, 0)
2215 page_cache_release(sg_page_iter_page(&sg_iter));
2219 /* shmemfs first checks if there is enough memory to allocate the page
2220 * and reports ENOSPC should there be insufficient, along with the usual
2221 * ENOMEM for a genuine allocation failure.
2223 * We use ENOSPC in our driver to mean that we have run out of aperture
2224 * space and so want to translate the error from shmemfs back to our
2225 * usual understanding of ENOMEM.
2227 if (PTR_ERR(page) == -ENOSPC)
2230 return PTR_ERR(page);
2233 /* Ensure that the associated pages are gathered from the backing storage
2234 * and pinned into our object. i915_gem_object_get_pages() may be called
2235 * multiple times before they are released by a single call to
2236 * i915_gem_object_put_pages() - once the pages are no longer referenced
2237 * either as a result of memory pressure (reaping pages under the shrinker)
2238 * or as the object is itself released.
2241 i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
2243 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2244 const struct drm_i915_gem_object_ops *ops = obj->ops;
2250 if (obj->madv != I915_MADV_WILLNEED) {
2251 DRM_DEBUG("Attempting to obtain a purgeable object\n");
2255 BUG_ON(obj->pages_pin_count);
2257 ret = ops->get_pages(obj);
2261 list_add_tail(&obj->global_list, &dev_priv->mm.unbound_list);
2266 i915_gem_object_move_to_active(struct drm_i915_gem_object *obj,
2267 struct intel_engine_cs *ring)
2269 struct drm_i915_gem_request *req;
2270 struct intel_engine_cs *old_ring;
2272 BUG_ON(ring == NULL);
2274 req = intel_ring_get_request(ring);
2275 old_ring = i915_gem_request_get_ring(obj->last_read_req);
2277 if (old_ring != ring && obj->last_write_req) {
2278 /* Keep the request relative to the current ring */
2279 i915_gem_request_assign(&obj->last_write_req, req);
2282 /* Add a reference if we're newly entering the active list. */
2284 drm_gem_object_reference(&obj->base);
2288 list_move_tail(&obj->ring_list, &ring->active_list);
2290 i915_gem_request_assign(&obj->last_read_req, req);
2293 void i915_vma_move_to_active(struct i915_vma *vma,
2294 struct intel_engine_cs *ring)
2296 list_move_tail(&vma->mm_list, &vma->vm->active_list);
2297 return i915_gem_object_move_to_active(vma->obj, ring);
2301 i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj)
2303 struct i915_vma *vma;
2305 BUG_ON(obj->base.write_domain & ~I915_GEM_GPU_DOMAINS);
2306 BUG_ON(!obj->active);
2308 list_for_each_entry(vma, &obj->vma_list, vma_link) {
2309 if (!list_empty(&vma->mm_list))
2310 list_move_tail(&vma->mm_list, &vma->vm->inactive_list);
2313 intel_fb_obj_flush(obj, true);
2315 list_del_init(&obj->ring_list);
2317 i915_gem_request_assign(&obj->last_read_req, NULL);
2318 i915_gem_request_assign(&obj->last_write_req, NULL);
2319 obj->base.write_domain = 0;
2321 i915_gem_request_assign(&obj->last_fenced_req, NULL);
2324 drm_gem_object_unreference(&obj->base);
2326 WARN_ON(i915_verify_lists(dev));
2330 i915_gem_object_retire(struct drm_i915_gem_object *obj)
2332 if (obj->last_read_req == NULL)
2335 if (i915_gem_request_completed(obj->last_read_req, true))
2336 i915_gem_object_move_to_inactive(obj);
2340 i915_gem_init_seqno(struct drm_device *dev, u32 seqno)
2342 struct drm_i915_private *dev_priv = dev->dev_private;
2343 struct intel_engine_cs *ring;
2346 /* Carefully retire all requests without writing to the rings */
2347 for_each_ring(ring, dev_priv, i) {
2348 ret = intel_ring_idle(ring);
2352 i915_gem_retire_requests(dev);
2354 /* Finally reset hw state */
2355 for_each_ring(ring, dev_priv, i) {
2356 intel_ring_init_seqno(ring, seqno);
2358 for (j = 0; j < ARRAY_SIZE(ring->semaphore.sync_seqno); j++)
2359 ring->semaphore.sync_seqno[j] = 0;
2365 int i915_gem_set_seqno(struct drm_device *dev, u32 seqno)
2367 struct drm_i915_private *dev_priv = dev->dev_private;
2373 /* HWS page needs to be set less than what we
2374 * will inject to ring
2376 ret = i915_gem_init_seqno(dev, seqno - 1);
2380 /* Carefully set the last_seqno value so that wrap
2381 * detection still works
2383 dev_priv->next_seqno = seqno;
2384 dev_priv->last_seqno = seqno - 1;
2385 if (dev_priv->last_seqno == 0)
2386 dev_priv->last_seqno--;
2392 i915_gem_get_seqno(struct drm_device *dev, u32 *seqno)
2394 struct drm_i915_private *dev_priv = dev->dev_private;
2396 /* reserve 0 for non-seqno */
2397 if (dev_priv->next_seqno == 0) {
2398 int ret = i915_gem_init_seqno(dev, 0);
2402 dev_priv->next_seqno = 1;
2405 *seqno = dev_priv->last_seqno = dev_priv->next_seqno++;
2409 int __i915_add_request(struct intel_engine_cs *ring,
2410 struct drm_file *file,
2411 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;
2419 request = ring->outstanding_lazy_request;
2420 if (WARN_ON(request == NULL))
2423 if (i915.enable_execlists) {
2424 ringbuf = request->ctx->engine[ring->id].ringbuf;
2426 ringbuf = ring->buffer;
2428 request_start = intel_ring_get_tail(ringbuf);
2430 * Emit any outstanding flushes - execbuf can fail to emit the flush
2431 * after having emitted the batchbuffer command. Hence we need to fix
2432 * things up similar to emitting the lazy request. The difference here
2433 * is that the flush _must_ happen before the next request, no matter
2436 if (i915.enable_execlists) {
2437 ret = logical_ring_flush_all_caches(ringbuf, request->ctx);
2441 ret = intel_ring_flush_all_caches(ring);
2446 /* Record the position of the start of the request so that
2447 * should we detect the updated seqno part-way through the
2448 * GPU processing the request, we never over-estimate the
2449 * position of the head.
2451 request->postfix = intel_ring_get_tail(ringbuf);
2453 if (i915.enable_execlists) {
2454 ret = ring->emit_request(ringbuf, request);
2458 ret = ring->add_request(ring);
2463 request->head = request_start;
2464 request->tail = intel_ring_get_tail(ringbuf);
2466 /* Whilst this request exists, batch_obj will be on the
2467 * active_list, and so will hold the active reference. Only when this
2468 * request is retired will the the batch_obj be moved onto the
2469 * inactive_list and lose its active reference. Hence we do not need
2470 * to explicitly hold another reference here.
2472 request->batch_obj = obj;
2474 if (!i915.enable_execlists) {
2475 /* Hold a reference to the current context so that we can inspect
2476 * it later in case a hangcheck error event fires.
2478 request->ctx = ring->last_context;
2480 i915_gem_context_reference(request->ctx);
2483 request->emitted_jiffies = jiffies;
2484 list_add_tail(&request->list, &ring->request_list);
2485 request->file_priv = NULL;
2488 struct drm_i915_file_private *file_priv = file->driver_priv;
2490 spin_lock(&file_priv->mm.lock);
2491 request->file_priv = file_priv;
2492 list_add_tail(&request->client_list,
2493 &file_priv->mm.request_list);
2494 spin_unlock(&file_priv->mm.lock);
2497 trace_i915_gem_request_add(request);
2498 ring->outstanding_lazy_request = NULL;
2500 i915_queue_hangcheck(ring->dev);
2502 cancel_delayed_work_sync(&dev_priv->mm.idle_work);
2503 queue_delayed_work(dev_priv->wq,
2504 &dev_priv->mm.retire_work,
2505 round_jiffies_up_relative(HZ));
2506 intel_mark_busy(dev_priv->dev);
2512 i915_gem_request_remove_from_client(struct drm_i915_gem_request *request)
2514 struct drm_i915_file_private *file_priv = request->file_priv;
2519 spin_lock(&file_priv->mm.lock);
2520 list_del(&request->client_list);
2521 request->file_priv = NULL;
2522 spin_unlock(&file_priv->mm.lock);
2525 static bool i915_context_is_banned(struct drm_i915_private *dev_priv,
2526 const struct intel_context *ctx)
2528 unsigned long elapsed;
2530 elapsed = get_seconds() - ctx->hang_stats.guilty_ts;
2532 if (ctx->hang_stats.banned)
2535 if (ctx->hang_stats.ban_period_seconds &&
2536 elapsed <= ctx->hang_stats.ban_period_seconds) {
2537 if (!i915_gem_context_is_default(ctx)) {
2538 DRM_DEBUG("context hanging too fast, banning!\n");
2540 } else if (i915_stop_ring_allow_ban(dev_priv)) {
2541 if (i915_stop_ring_allow_warn(dev_priv))
2542 DRM_ERROR("gpu hanging too fast, banning!\n");
2550 static void i915_set_reset_status(struct drm_i915_private *dev_priv,
2551 struct intel_context *ctx,
2554 struct i915_ctx_hang_stats *hs;
2559 hs = &ctx->hang_stats;
2562 hs->banned = i915_context_is_banned(dev_priv, ctx);
2564 hs->guilty_ts = get_seconds();
2566 hs->batch_pending++;
2570 static void i915_gem_free_request(struct drm_i915_gem_request *request)
2572 list_del(&request->list);
2573 i915_gem_request_remove_from_client(request);
2575 i915_gem_request_unreference(request);
2578 void i915_gem_request_free(struct kref *req_ref)
2580 struct drm_i915_gem_request *req = container_of(req_ref,
2582 struct intel_context *ctx = req->ctx;
2585 if (i915.enable_execlists) {
2586 struct intel_engine_cs *ring = req->ring;
2588 if (ctx != ring->default_context)
2589 intel_lr_context_unpin(ring, ctx);
2592 i915_gem_context_unreference(ctx);
2598 struct drm_i915_gem_request *
2599 i915_gem_find_active_request(struct intel_engine_cs *ring)
2601 struct drm_i915_gem_request *request;
2603 list_for_each_entry(request, &ring->request_list, list) {
2604 if (i915_gem_request_completed(request, false))
2613 static void i915_gem_reset_ring_status(struct drm_i915_private *dev_priv,
2614 struct intel_engine_cs *ring)
2616 struct drm_i915_gem_request *request;
2619 request = i915_gem_find_active_request(ring);
2621 if (request == NULL)
2624 ring_hung = ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG;
2626 i915_set_reset_status(dev_priv, request->ctx, ring_hung);
2628 list_for_each_entry_continue(request, &ring->request_list, list)
2629 i915_set_reset_status(dev_priv, request->ctx, false);
2632 static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv,
2633 struct intel_engine_cs *ring)
2635 while (!list_empty(&ring->active_list)) {
2636 struct drm_i915_gem_object *obj;
2638 obj = list_first_entry(&ring->active_list,
2639 struct drm_i915_gem_object,
2642 i915_gem_object_move_to_inactive(obj);
2646 * Clear the execlists queue up before freeing the requests, as those
2647 * are the ones that keep the context and ringbuffer backing objects
2650 while (!list_empty(&ring->execlist_queue)) {
2651 struct drm_i915_gem_request *submit_req;
2653 submit_req = list_first_entry(&ring->execlist_queue,
2654 struct drm_i915_gem_request,
2656 list_del(&submit_req->execlist_link);
2657 intel_runtime_pm_put(dev_priv);
2659 if (submit_req->ctx != ring->default_context)
2660 intel_lr_context_unpin(ring, submit_req->ctx);
2662 i915_gem_request_unreference(submit_req);
2666 * We must free the requests after all the corresponding objects have
2667 * been moved off active lists. Which is the same order as the normal
2668 * retire_requests function does. This is important if object hold
2669 * implicit references on things like e.g. ppgtt address spaces through
2672 while (!list_empty(&ring->request_list)) {
2673 struct drm_i915_gem_request *request;
2675 request = list_first_entry(&ring->request_list,
2676 struct drm_i915_gem_request,
2679 i915_gem_free_request(request);
2682 /* This may not have been flushed before the reset, so clean it now */
2683 i915_gem_request_assign(&ring->outstanding_lazy_request, NULL);
2686 void i915_gem_restore_fences(struct drm_device *dev)
2688 struct drm_i915_private *dev_priv = dev->dev_private;
2691 for (i = 0; i < dev_priv->num_fence_regs; i++) {
2692 struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i];
2695 * Commit delayed tiling changes if we have an object still
2696 * attached to the fence, otherwise just clear the fence.
2699 i915_gem_object_update_fence(reg->obj, reg,
2700 reg->obj->tiling_mode);
2702 i915_gem_write_fence(dev, i, NULL);
2707 void i915_gem_reset(struct drm_device *dev)
2709 struct drm_i915_private *dev_priv = dev->dev_private;
2710 struct intel_engine_cs *ring;
2714 * Before we free the objects from the requests, we need to inspect
2715 * them for finding the guilty party. As the requests only borrow
2716 * their reference to the objects, the inspection must be done first.
2718 for_each_ring(ring, dev_priv, i)
2719 i915_gem_reset_ring_status(dev_priv, ring);
2721 for_each_ring(ring, dev_priv, i)
2722 i915_gem_reset_ring_cleanup(dev_priv, ring);
2724 i915_gem_context_reset(dev);
2726 i915_gem_restore_fences(dev);
2730 * This function clears the request list as sequence numbers are passed.
2733 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 /* Move any buffers on the active list that are no longer referenced
2741 * by the ringbuffer to the flushing/inactive lists as appropriate,
2742 * before we free the context associated with the requests.
2744 while (!list_empty(&ring->active_list)) {
2745 struct drm_i915_gem_object *obj;
2747 obj = list_first_entry(&ring->active_list,
2748 struct drm_i915_gem_object,
2751 if (!i915_gem_request_completed(obj->last_read_req, true))
2754 i915_gem_object_move_to_inactive(obj);
2758 while (!list_empty(&ring->request_list)) {
2759 struct drm_i915_gem_request *request;
2760 struct intel_ringbuffer *ringbuf;
2762 request = list_first_entry(&ring->request_list,
2763 struct drm_i915_gem_request,
2766 if (!i915_gem_request_completed(request, true))
2769 trace_i915_gem_request_retire(request);
2771 /* This is one of the few common intersection points
2772 * between legacy ringbuffer submission and execlists:
2773 * we need to tell them apart in order to find the correct
2774 * ringbuffer to which the request belongs to.
2776 if (i915.enable_execlists) {
2777 struct intel_context *ctx = request->ctx;
2778 ringbuf = ctx->engine[ring->id].ringbuf;
2780 ringbuf = ring->buffer;
2782 /* We know the GPU must have read the request to have
2783 * sent us the seqno + interrupt, so use the position
2784 * of tail of the request to update the last known position
2787 ringbuf->last_retired_head = request->postfix;
2789 i915_gem_free_request(request);
2792 if (unlikely(ring->trace_irq_req &&
2793 i915_gem_request_completed(ring->trace_irq_req, true))) {
2794 ring->irq_put(ring);
2795 i915_gem_request_assign(&ring->trace_irq_req, NULL);
2798 WARN_ON(i915_verify_lists(ring->dev));
2802 i915_gem_retire_requests(struct drm_device *dev)
2804 struct drm_i915_private *dev_priv = dev->dev_private;
2805 struct intel_engine_cs *ring;
2809 for_each_ring(ring, dev_priv, i) {
2810 i915_gem_retire_requests_ring(ring);
2811 idle &= list_empty(&ring->request_list);
2812 if (i915.enable_execlists) {
2813 unsigned long flags;
2815 spin_lock_irqsave(&ring->execlist_lock, flags);
2816 idle &= list_empty(&ring->execlist_queue);
2817 spin_unlock_irqrestore(&ring->execlist_lock, flags);
2819 intel_execlists_retire_requests(ring);
2824 mod_delayed_work(dev_priv->wq,
2825 &dev_priv->mm.idle_work,
2826 msecs_to_jiffies(100));
2832 i915_gem_retire_work_handler(struct work_struct *work)
2834 struct drm_i915_private *dev_priv =
2835 container_of(work, typeof(*dev_priv), mm.retire_work.work);
2836 struct drm_device *dev = dev_priv->dev;
2839 /* Come back later if the device is busy... */
2841 if (mutex_trylock(&dev->struct_mutex)) {
2842 idle = i915_gem_retire_requests(dev);
2843 mutex_unlock(&dev->struct_mutex);
2846 queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work,
2847 round_jiffies_up_relative(HZ));
2851 i915_gem_idle_work_handler(struct work_struct *work)
2853 struct drm_i915_private *dev_priv =
2854 container_of(work, typeof(*dev_priv), mm.idle_work.work);
2856 intel_mark_idle(dev_priv->dev);
2860 * Ensures that an object will eventually get non-busy by flushing any required
2861 * write domains, emitting any outstanding lazy request and retiring and
2862 * completed requests.
2865 i915_gem_object_flush_active(struct drm_i915_gem_object *obj)
2867 struct intel_engine_cs *ring;
2871 ring = i915_gem_request_get_ring(obj->last_read_req);
2873 ret = i915_gem_check_olr(obj->last_read_req);
2877 i915_gem_retire_requests_ring(ring);
2884 * i915_gem_wait_ioctl - implements DRM_IOCTL_I915_GEM_WAIT
2885 * @DRM_IOCTL_ARGS: standard ioctl arguments
2887 * Returns 0 if successful, else an error is returned with the remaining time in
2888 * the timeout parameter.
2889 * -ETIME: object is still busy after timeout
2890 * -ERESTARTSYS: signal interrupted the wait
2891 * -ENONENT: object doesn't exist
2892 * Also possible, but rare:
2893 * -EAGAIN: GPU wedged
2895 * -ENODEV: Internal IRQ fail
2896 * -E?: The add request failed
2898 * The wait ioctl with a timeout of 0 reimplements the busy ioctl. With any
2899 * non-zero timeout parameter the wait ioctl will wait for the given number of
2900 * nanoseconds on an object becoming unbusy. Since the wait itself does so
2901 * without holding struct_mutex the object may become re-busied before this
2902 * function completes. A similar but shorter * race condition exists in the busy
2906 i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
2908 struct drm_i915_private *dev_priv = dev->dev_private;
2909 struct drm_i915_gem_wait *args = data;
2910 struct drm_i915_gem_object *obj;
2911 struct drm_i915_gem_request *req;
2912 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);
2933 if (!obj->active || !obj->last_read_req)
2936 req = obj->last_read_req;
2938 /* Do this after OLR check to make sure we make forward progress polling
2939 * on this IOCTL with a timeout <=0 (like busy ioctl)
2941 if (args->timeout_ns <= 0) {
2946 drm_gem_object_unreference(&obj->base);
2947 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
2948 i915_gem_request_reference(req);
2949 mutex_unlock(&dev->struct_mutex);
2951 ret = __i915_wait_request(req, reset_counter, true, &args->timeout_ns,
2953 mutex_lock(&dev->struct_mutex);
2954 i915_gem_request_unreference(req);
2955 mutex_unlock(&dev->struct_mutex);
2959 drm_gem_object_unreference(&obj->base);
2960 mutex_unlock(&dev->struct_mutex);
2965 * i915_gem_object_sync - sync an object to a ring.
2967 * @obj: object which may be in use on another ring.
2968 * @to: ring we wish to use the object on. May be NULL.
2970 * This code is meant to abstract object synchronization with the GPU.
2971 * Calling with NULL implies synchronizing the object with the CPU
2972 * rather than a particular GPU ring.
2974 * Returns 0 if successful, else propagates up the lower layer error.
2977 i915_gem_object_sync(struct drm_i915_gem_object *obj,
2978 struct intel_engine_cs *to)
2980 struct intel_engine_cs *from;
2984 from = i915_gem_request_get_ring(obj->last_read_req);
2986 if (from == NULL || to == from)
2989 if (to == NULL || !i915_semaphore_is_enabled(obj->base.dev))
2990 return i915_gem_object_wait_rendering(obj, false);
2992 idx = intel_ring_sync_index(from, to);
2994 seqno = i915_gem_request_get_seqno(obj->last_read_req);
2995 /* Optimization: Avoid semaphore sync when we are sure we already
2996 * waited for an object with higher seqno */
2997 if (seqno <= from->semaphore.sync_seqno[idx])
3000 ret = i915_gem_check_olr(obj->last_read_req);
3004 trace_i915_gem_ring_sync_to(from, to, obj->last_read_req);
3005 ret = to->semaphore.sync_to(to, from, seqno);
3007 /* We use last_read_req because sync_to()
3008 * might have just caused seqno wrap under
3011 from->semaphore.sync_seqno[idx] =
3012 i915_gem_request_get_seqno(obj->last_read_req);
3017 static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj)
3019 u32 old_write_domain, old_read_domains;
3021 /* Force a pagefault for domain tracking on next user access */
3022 i915_gem_release_mmap(obj);
3024 if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
3027 /* Wait for any direct GTT access to complete */
3030 old_read_domains = obj->base.read_domains;
3031 old_write_domain = obj->base.write_domain;
3033 obj->base.read_domains &= ~I915_GEM_DOMAIN_GTT;
3034 obj->base.write_domain &= ~I915_GEM_DOMAIN_GTT;
3036 trace_i915_gem_object_change_domain(obj,
3041 int i915_vma_unbind(struct i915_vma *vma)
3043 struct drm_i915_gem_object *obj = vma->obj;
3044 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3047 if (list_empty(&vma->vma_link))
3050 if (!drm_mm_node_allocated(&vma->node)) {
3051 i915_gem_vma_destroy(vma);
3058 BUG_ON(obj->pages == NULL);
3060 ret = i915_gem_object_finish_gpu(obj);
3063 /* Continue on if we fail due to EIO, the GPU is hung so we
3064 * should be safe and we need to cleanup or else we might
3065 * cause memory corruption through use-after-free.
3068 if (i915_is_ggtt(vma->vm) &&
3069 vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) {
3070 i915_gem_object_finish_gtt(obj);
3072 /* release the fence reg _after_ flushing */
3073 ret = i915_gem_object_put_fence(obj);
3078 trace_i915_vma_unbind(vma);
3080 vma->unbind_vma(vma);
3082 list_del_init(&vma->mm_list);
3083 if (i915_is_ggtt(vma->vm)) {
3084 if (vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL) {
3085 obj->map_and_fenceable = false;
3086 } else if (vma->ggtt_view.pages) {
3087 sg_free_table(vma->ggtt_view.pages);
3088 kfree(vma->ggtt_view.pages);
3089 vma->ggtt_view.pages = NULL;
3093 drm_mm_remove_node(&vma->node);
3094 i915_gem_vma_destroy(vma);
3096 /* Since the unbound list is global, only move to that list if
3097 * no more VMAs exist. */
3098 if (list_empty(&obj->vma_list)) {
3099 /* Throw away the active reference before
3100 * moving to the unbound list. */
3101 i915_gem_object_retire(obj);
3103 i915_gem_gtt_finish_object(obj);
3104 list_move_tail(&obj->global_list, &dev_priv->mm.unbound_list);
3107 /* And finally now the object is completely decoupled from this vma,
3108 * we can drop its hold on the backing storage and allow it to be
3109 * reaped by the shrinker.
3111 i915_gem_object_unpin_pages(obj);
3116 int i915_gpu_idle(struct drm_device *dev)
3118 struct drm_i915_private *dev_priv = dev->dev_private;
3119 struct intel_engine_cs *ring;
3122 /* Flush everything onto the inactive list. */
3123 for_each_ring(ring, dev_priv, i) {
3124 if (!i915.enable_execlists) {
3125 ret = i915_switch_context(ring, ring->default_context);
3130 ret = intel_ring_idle(ring);
3138 static void i965_write_fence_reg(struct drm_device *dev, int reg,
3139 struct drm_i915_gem_object *obj)
3141 struct drm_i915_private *dev_priv = dev->dev_private;
3143 int fence_pitch_shift;
3145 if (INTEL_INFO(dev)->gen >= 6) {
3146 fence_reg = FENCE_REG_SANDYBRIDGE_0;
3147 fence_pitch_shift = SANDYBRIDGE_FENCE_PITCH_SHIFT;
3149 fence_reg = FENCE_REG_965_0;
3150 fence_pitch_shift = I965_FENCE_PITCH_SHIFT;
3153 fence_reg += reg * 8;
3155 /* To w/a incoherency with non-atomic 64-bit register updates,
3156 * we split the 64-bit update into two 32-bit writes. In order
3157 * for a partial fence not to be evaluated between writes, we
3158 * precede the update with write to turn off the fence register,
3159 * and only enable the fence as the last step.
3161 * For extra levels of paranoia, we make sure each step lands
3162 * before applying the next step.
3164 I915_WRITE(fence_reg, 0);
3165 POSTING_READ(fence_reg);
3168 u32 size = i915_gem_obj_ggtt_size(obj);
3171 /* Adjust fence size to match tiled area */
3172 if (obj->tiling_mode != I915_TILING_NONE) {
3173 uint32_t row_size = obj->stride *
3174 (obj->tiling_mode == I915_TILING_Y ? 32 : 8);
3175 size = (size / row_size) * row_size;
3178 val = (uint64_t)((i915_gem_obj_ggtt_offset(obj) + size - 4096) &
3180 val |= i915_gem_obj_ggtt_offset(obj) & 0xfffff000;
3181 val |= (uint64_t)((obj->stride / 128) - 1) << fence_pitch_shift;
3182 if (obj->tiling_mode == I915_TILING_Y)
3183 val |= 1 << I965_FENCE_TILING_Y_SHIFT;
3184 val |= I965_FENCE_REG_VALID;
3186 I915_WRITE(fence_reg + 4, val >> 32);
3187 POSTING_READ(fence_reg + 4);
3189 I915_WRITE(fence_reg + 0, val);
3190 POSTING_READ(fence_reg);
3192 I915_WRITE(fence_reg + 4, 0);
3193 POSTING_READ(fence_reg + 4);
3197 static void i915_write_fence_reg(struct drm_device *dev, int reg,
3198 struct drm_i915_gem_object *obj)
3200 struct drm_i915_private *dev_priv = dev->dev_private;
3204 u32 size = i915_gem_obj_ggtt_size(obj);
3208 WARN((i915_gem_obj_ggtt_offset(obj) & ~I915_FENCE_START_MASK) ||
3209 (size & -size) != size ||
3210 (i915_gem_obj_ggtt_offset(obj) & (size - 1)),
3211 "object 0x%08lx [fenceable? %d] not 1M or pot-size (0x%08x) aligned\n",
3212 i915_gem_obj_ggtt_offset(obj), obj->map_and_fenceable, size);
3214 if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev))
3219 /* Note: pitch better be a power of two tile widths */
3220 pitch_val = obj->stride / tile_width;
3221 pitch_val = ffs(pitch_val) - 1;
3223 val = i915_gem_obj_ggtt_offset(obj);
3224 if (obj->tiling_mode == I915_TILING_Y)
3225 val |= 1 << I830_FENCE_TILING_Y_SHIFT;
3226 val |= I915_FENCE_SIZE_BITS(size);
3227 val |= pitch_val << I830_FENCE_PITCH_SHIFT;
3228 val |= I830_FENCE_REG_VALID;
3233 reg = FENCE_REG_830_0 + reg * 4;
3235 reg = FENCE_REG_945_8 + (reg - 8) * 4;
3237 I915_WRITE(reg, val);
3241 static void i830_write_fence_reg(struct drm_device *dev, int reg,
3242 struct drm_i915_gem_object *obj)
3244 struct drm_i915_private *dev_priv = dev->dev_private;
3248 u32 size = i915_gem_obj_ggtt_size(obj);
3251 WARN((i915_gem_obj_ggtt_offset(obj) & ~I830_FENCE_START_MASK) ||
3252 (size & -size) != size ||
3253 (i915_gem_obj_ggtt_offset(obj) & (size - 1)),
3254 "object 0x%08lx not 512K or pot-size 0x%08x aligned\n",
3255 i915_gem_obj_ggtt_offset(obj), size);
3257 pitch_val = obj->stride / 128;
3258 pitch_val = ffs(pitch_val) - 1;
3260 val = i915_gem_obj_ggtt_offset(obj);
3261 if (obj->tiling_mode == I915_TILING_Y)
3262 val |= 1 << I830_FENCE_TILING_Y_SHIFT;
3263 val |= I830_FENCE_SIZE_BITS(size);
3264 val |= pitch_val << I830_FENCE_PITCH_SHIFT;
3265 val |= I830_FENCE_REG_VALID;
3269 I915_WRITE(FENCE_REG_830_0 + reg * 4, val);
3270 POSTING_READ(FENCE_REG_830_0 + reg * 4);
3273 inline static bool i915_gem_object_needs_mb(struct drm_i915_gem_object *obj)
3275 return obj && obj->base.read_domains & I915_GEM_DOMAIN_GTT;
3278 static void i915_gem_write_fence(struct drm_device *dev, int reg,
3279 struct drm_i915_gem_object *obj)
3281 struct drm_i915_private *dev_priv = dev->dev_private;
3283 /* Ensure that all CPU reads are completed before installing a fence
3284 * and all writes before removing the fence.
3286 if (i915_gem_object_needs_mb(dev_priv->fence_regs[reg].obj))
3289 WARN(obj && (!obj->stride || !obj->tiling_mode),
3290 "bogus fence setup with stride: 0x%x, tiling mode: %i\n",
3291 obj->stride, obj->tiling_mode);
3294 i830_write_fence_reg(dev, reg, obj);
3295 else if (IS_GEN3(dev))
3296 i915_write_fence_reg(dev, reg, obj);
3297 else if (INTEL_INFO(dev)->gen >= 4)
3298 i965_write_fence_reg(dev, reg, obj);
3300 /* And similarly be paranoid that no direct access to this region
3301 * is reordered to before the fence is installed.
3303 if (i915_gem_object_needs_mb(obj))
3307 static inline int fence_number(struct drm_i915_private *dev_priv,
3308 struct drm_i915_fence_reg *fence)
3310 return fence - dev_priv->fence_regs;
3313 static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj,
3314 struct drm_i915_fence_reg *fence,
3317 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3318 int reg = fence_number(dev_priv, fence);
3320 i915_gem_write_fence(obj->base.dev, reg, enable ? obj : NULL);
3323 obj->fence_reg = reg;
3325 list_move_tail(&fence->lru_list, &dev_priv->mm.fence_list);
3327 obj->fence_reg = I915_FENCE_REG_NONE;
3329 list_del_init(&fence->lru_list);
3331 obj->fence_dirty = false;
3335 i915_gem_object_wait_fence(struct drm_i915_gem_object *obj)
3337 if (obj->last_fenced_req) {
3338 int ret = i915_wait_request(obj->last_fenced_req);
3342 i915_gem_request_assign(&obj->last_fenced_req, NULL);
3349 i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
3351 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
3352 struct drm_i915_fence_reg *fence;
3355 ret = i915_gem_object_wait_fence(obj);
3359 if (obj->fence_reg == I915_FENCE_REG_NONE)
3362 fence = &dev_priv->fence_regs[obj->fence_reg];
3364 if (WARN_ON(fence->pin_count))
3367 i915_gem_object_fence_lost(obj);
3368 i915_gem_object_update_fence(obj, fence, false);
3373 static struct drm_i915_fence_reg *
3374 i915_find_fence_reg(struct drm_device *dev)
3376 struct drm_i915_private *dev_priv = dev->dev_private;
3377 struct drm_i915_fence_reg *reg, *avail;
3380 /* First try to find a free reg */
3382 for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) {
3383 reg = &dev_priv->fence_regs[i];
3387 if (!reg->pin_count)
3394 /* None available, try to steal one or wait for a user to finish */
3395 list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) {
3403 /* Wait for completion of pending flips which consume fences */
3404 if (intel_has_pending_fb_unpin(dev))
3405 return ERR_PTR(-EAGAIN);
3407 return ERR_PTR(-EDEADLK);
3411 * i915_gem_object_get_fence - set up fencing for an object
3412 * @obj: object to map through a fence reg
3414 * When mapping objects through the GTT, userspace wants to be able to write
3415 * to them without having to worry about swizzling if the object is tiled.
3416 * This function walks the fence regs looking for a free one for @obj,
3417 * stealing one if it can't find any.
3419 * It then sets up the reg based on the object's properties: address, pitch
3420 * and tiling format.
3422 * For an untiled surface, this removes any existing fence.
3425 i915_gem_object_get_fence(struct drm_i915_gem_object *obj)
3427 struct drm_device *dev = obj->base.dev;
3428 struct drm_i915_private *dev_priv = dev->dev_private;
3429 bool enable = obj->tiling_mode != I915_TILING_NONE;
3430 struct drm_i915_fence_reg *reg;
3433 /* Have we updated the tiling parameters upon the object and so
3434 * will need to serialise the write to the associated fence register?
3436 if (obj->fence_dirty) {
3437 ret = i915_gem_object_wait_fence(obj);
3442 /* Just update our place in the LRU if our fence is getting reused. */
3443 if (obj->fence_reg != I915_FENCE_REG_NONE) {
3444 reg = &dev_priv->fence_regs[obj->fence_reg];
3445 if (!obj->fence_dirty) {
3446 list_move_tail(®->lru_list,
3447 &dev_priv->mm.fence_list);
3450 } else if (enable) {
3451 if (WARN_ON(!obj->map_and_fenceable))
3454 reg = i915_find_fence_reg(dev);
3456 return PTR_ERR(reg);
3459 struct drm_i915_gem_object *old = reg->obj;
3461 ret = i915_gem_object_wait_fence(old);
3465 i915_gem_object_fence_lost(old);
3470 i915_gem_object_update_fence(obj, reg, enable);
3475 static bool i915_gem_valid_gtt_space(struct i915_vma *vma,
3476 unsigned long cache_level)
3478 struct drm_mm_node *gtt_space = &vma->node;
3479 struct drm_mm_node *other;
3482 * On some machines we have to be careful when putting differing types
3483 * of snoopable memory together to avoid the prefetcher crossing memory
3484 * domains and dying. During vm initialisation, we decide whether or not
3485 * these constraints apply and set the drm_mm.color_adjust
3488 if (vma->vm->mm.color_adjust == NULL)
3491 if (!drm_mm_node_allocated(gtt_space))
3494 if (list_empty(>t_space->node_list))
3497 other = list_entry(gtt_space->node_list.prev, struct drm_mm_node, node_list);
3498 if (other->allocated && !other->hole_follows && other->color != cache_level)
3501 other = list_entry(gtt_space->node_list.next, struct drm_mm_node, node_list);
3502 if (other->allocated && !gtt_space->hole_follows && other->color != cache_level)
3509 * Finds free space in the GTT aperture and binds the object there.
3511 static struct i915_vma *
3512 i915_gem_object_bind_to_vm(struct drm_i915_gem_object *obj,
3513 struct i915_address_space *vm,
3516 const struct i915_ggtt_view *view)
3518 struct drm_device *dev = obj->base.dev;
3519 struct drm_i915_private *dev_priv = dev->dev_private;
3520 u32 size, fence_size, fence_alignment, unfenced_alignment;
3521 unsigned long start =
3522 flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;
3524 flags & PIN_MAPPABLE ? dev_priv->gtt.mappable_end : vm->total;
3525 struct i915_vma *vma;
3528 fence_size = i915_gem_get_gtt_size(dev,
3531 fence_alignment = i915_gem_get_gtt_alignment(dev,
3533 obj->tiling_mode, true);
3534 unfenced_alignment =
3535 i915_gem_get_gtt_alignment(dev,
3537 obj->tiling_mode, false);
3540 alignment = flags & PIN_MAPPABLE ? fence_alignment :
3542 if (flags & PIN_MAPPABLE && alignment & (fence_alignment - 1)) {
3543 DRM_DEBUG("Invalid object alignment requested %u\n", alignment);
3544 return ERR_PTR(-EINVAL);
3547 size = flags & PIN_MAPPABLE ? fence_size : obj->base.size;
3549 /* If the object is bigger than the entire aperture, reject it early
3550 * before evicting everything in a vain attempt to find space.
3552 if (obj->base.size > end) {
3553 DRM_DEBUG("Attempting to bind an object larger than the aperture: object=%zd > %s aperture=%lu\n",
3555 flags & PIN_MAPPABLE ? "mappable" : "total",
3557 return ERR_PTR(-E2BIG);
3560 ret = i915_gem_object_get_pages(obj);
3562 return ERR_PTR(ret);
3564 i915_gem_object_pin_pages(obj);
3566 vma = i915_gem_obj_lookup_or_create_vma_view(obj, vm, view);
3571 ret = drm_mm_insert_node_in_range_generic(&vm->mm, &vma->node,
3575 DRM_MM_SEARCH_DEFAULT,
3576 DRM_MM_CREATE_DEFAULT);
3578 ret = i915_gem_evict_something(dev, vm, size, alignment,
3587 if (WARN_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level))) {
3589 goto err_remove_node;
3592 ret = i915_gem_gtt_prepare_object(obj);
3594 goto err_remove_node;
3596 trace_i915_vma_bind(vma, flags);
3597 ret = i915_vma_bind(vma, obj->cache_level,
3598 flags & PIN_GLOBAL ? GLOBAL_BIND : 0);
3600 goto err_finish_gtt;
3602 list_move_tail(&obj->global_list, &dev_priv->mm.bound_list);
3603 list_add_tail(&vma->mm_list, &vm->inactive_list);
3608 i915_gem_gtt_finish_object(obj);
3610 drm_mm_remove_node(&vma->node);
3612 i915_gem_vma_destroy(vma);
3615 i915_gem_object_unpin_pages(obj);
3620 i915_gem_clflush_object(struct drm_i915_gem_object *obj,
3623 /* If we don't have a page list set up, then we're not pinned
3624 * to GPU, and we can ignore the cache flush because it'll happen
3625 * again at bind time.
3627 if (obj->pages == NULL)
3631 * Stolen memory is always coherent with the GPU as it is explicitly
3632 * marked as wc by the system, or the system is cache-coherent.
3634 if (obj->stolen || obj->phys_handle)
3637 /* If the GPU is snooping the contents of the CPU cache,
3638 * we do not need to manually clear the CPU cache lines. However,
3639 * the caches are only snooped when the render cache is
3640 * flushed/invalidated. As we always have to emit invalidations
3641 * and flushes when moving into and out of the RENDER domain, correct
3642 * snooping behaviour occurs naturally as the result of our domain
3645 if (!force && cpu_cache_is_coherent(obj->base.dev, obj->cache_level)) {
3646 obj->cache_dirty = true;
3650 trace_i915_gem_object_clflush(obj);
3651 drm_clflush_sg(obj->pages);
3652 obj->cache_dirty = false;
3657 /** Flushes the GTT write domain for the object if it's dirty. */
3659 i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj)
3661 uint32_t old_write_domain;
3663 if (obj->base.write_domain != I915_GEM_DOMAIN_GTT)
3666 /* No actual flushing is required for the GTT write domain. Writes
3667 * to it immediately go to main memory as far as we know, so there's
3668 * no chipset flush. It also doesn't land in render cache.
3670 * However, we do have to enforce the order so that all writes through
3671 * the GTT land before any writes to the device, such as updates to
3676 old_write_domain = obj->base.write_domain;
3677 obj->base.write_domain = 0;
3679 intel_fb_obj_flush(obj, false);
3681 trace_i915_gem_object_change_domain(obj,
3682 obj->base.read_domains,
3686 /** Flushes the CPU write domain for the object if it's dirty. */
3688 i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj)
3690 uint32_t old_write_domain;
3692 if (obj->base.write_domain != I915_GEM_DOMAIN_CPU)
3695 if (i915_gem_clflush_object(obj, obj->pin_display))
3696 i915_gem_chipset_flush(obj->base.dev);
3698 old_write_domain = obj->base.write_domain;
3699 obj->base.write_domain = 0;
3701 intel_fb_obj_flush(obj, false);
3703 trace_i915_gem_object_change_domain(obj,
3704 obj->base.read_domains,
3709 * Moves a single object to the GTT read, and possibly write domain.
3711 * This function returns when the move is complete, including waiting on
3715 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
3717 uint32_t old_write_domain, old_read_domains;
3718 struct i915_vma *vma;
3721 if (obj->base.write_domain == I915_GEM_DOMAIN_GTT)
3724 ret = i915_gem_object_wait_rendering(obj, !write);
3728 i915_gem_object_retire(obj);
3730 /* Flush and acquire obj->pages so that we are coherent through
3731 * direct access in memory with previous cached writes through
3732 * shmemfs and that our cache domain tracking remains valid.
3733 * For example, if the obj->filp was moved to swap without us
3734 * being notified and releasing the pages, we would mistakenly
3735 * continue to assume that the obj remained out of the CPU cached
3738 ret = i915_gem_object_get_pages(obj);
3742 i915_gem_object_flush_cpu_write_domain(obj);
3744 /* Serialise direct access to this object with the barriers for
3745 * coherent writes from the GPU, by effectively invalidating the
3746 * GTT domain upon first access.
3748 if ((obj->base.read_domains & I915_GEM_DOMAIN_GTT) == 0)
3751 old_write_domain = obj->base.write_domain;
3752 old_read_domains = obj->base.read_domains;
3754 /* It should now be out of any other write domains, and we can update
3755 * the domain values for our changes.
3757 BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_GTT) != 0);
3758 obj->base.read_domains |= I915_GEM_DOMAIN_GTT;
3760 obj->base.read_domains = I915_GEM_DOMAIN_GTT;
3761 obj->base.write_domain = I915_GEM_DOMAIN_GTT;
3766 intel_fb_obj_invalidate(obj, NULL);
3768 trace_i915_gem_object_change_domain(obj,
3772 /* And bump the LRU for this access */
3773 vma = i915_gem_obj_to_ggtt(obj);
3774 if (vma && drm_mm_node_allocated(&vma->node) && !obj->active)
3775 list_move_tail(&vma->mm_list,
3776 &to_i915(obj->base.dev)->gtt.base.inactive_list);
3781 int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
3782 enum i915_cache_level cache_level)
3784 struct drm_device *dev = obj->base.dev;
3785 struct i915_vma *vma, *next;
3788 if (obj->cache_level == cache_level)
3791 if (i915_gem_obj_is_pinned(obj)) {
3792 DRM_DEBUG("can not change the cache level of pinned objects\n");
3796 list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) {
3797 if (!i915_gem_valid_gtt_space(vma, cache_level)) {
3798 ret = i915_vma_unbind(vma);
3804 if (i915_gem_obj_bound_any(obj)) {
3805 ret = i915_gem_object_finish_gpu(obj);
3809 i915_gem_object_finish_gtt(obj);
3811 /* Before SandyBridge, you could not use tiling or fence
3812 * registers with snooped memory, so relinquish any fences
3813 * currently pointing to our region in the aperture.
3815 if (INTEL_INFO(dev)->gen < 6) {
3816 ret = i915_gem_object_put_fence(obj);
3821 list_for_each_entry(vma, &obj->vma_list, vma_link)
3822 if (drm_mm_node_allocated(&vma->node)) {
3823 ret = i915_vma_bind(vma, cache_level,
3824 vma->bound & GLOBAL_BIND);
3830 list_for_each_entry(vma, &obj->vma_list, vma_link)
3831 vma->node.color = cache_level;
3832 obj->cache_level = cache_level;
3834 if (obj->cache_dirty &&
3835 obj->base.write_domain != I915_GEM_DOMAIN_CPU &&
3836 cpu_write_needs_clflush(obj)) {
3837 if (i915_gem_clflush_object(obj, true))
3838 i915_gem_chipset_flush(obj->base.dev);
3844 int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data,
3845 struct drm_file *file)
3847 struct drm_i915_gem_caching *args = data;
3848 struct drm_i915_gem_object *obj;
3851 ret = i915_mutex_lock_interruptible(dev);
3855 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
3856 if (&obj->base == NULL) {
3861 switch (obj->cache_level) {
3862 case I915_CACHE_LLC:
3863 case I915_CACHE_L3_LLC:
3864 args->caching = I915_CACHING_CACHED;
3868 args->caching = I915_CACHING_DISPLAY;
3872 args->caching = I915_CACHING_NONE;
3876 drm_gem_object_unreference(&obj->base);
3878 mutex_unlock(&dev->struct_mutex);
3882 int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
3883 struct drm_file *file)
3885 struct drm_i915_gem_caching *args = data;
3886 struct drm_i915_gem_object *obj;
3887 enum i915_cache_level level;
3890 switch (args->caching) {
3891 case I915_CACHING_NONE:
3892 level = I915_CACHE_NONE;
3894 case I915_CACHING_CACHED:
3895 level = I915_CACHE_LLC;
3897 case I915_CACHING_DISPLAY:
3898 level = HAS_WT(dev) ? I915_CACHE_WT : I915_CACHE_NONE;
3904 ret = i915_mutex_lock_interruptible(dev);
3908 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
3909 if (&obj->base == NULL) {
3914 ret = i915_gem_object_set_cache_level(obj, level);
3916 drm_gem_object_unreference(&obj->base);
3918 mutex_unlock(&dev->struct_mutex);
3922 static bool is_pin_display(struct drm_i915_gem_object *obj)
3924 struct i915_vma *vma;
3926 vma = i915_gem_obj_to_ggtt(obj);
3930 /* There are 2 sources that pin objects:
3931 * 1. The display engine (scanouts, sprites, cursors);
3932 * 2. Reservations for execbuffer;
3934 * We can ignore reservations as we hold the struct_mutex and
3935 * are only called outside of the reservation path.
3937 return vma->pin_count;
3941 * Prepare buffer for display plane (scanout, cursors, etc).
3942 * Can be called from an uninterruptible phase (modesetting) and allows
3943 * any flushes to be pipelined (for pageflips).
3946 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
3948 struct intel_engine_cs *pipelined)
3950 u32 old_read_domains, old_write_domain;
3951 bool was_pin_display;
3954 if (pipelined != i915_gem_request_get_ring(obj->last_read_req)) {
3955 ret = i915_gem_object_sync(obj, pipelined);
3960 /* Mark the pin_display early so that we account for the
3961 * display coherency whilst setting up the cache domains.
3963 was_pin_display = obj->pin_display;
3964 obj->pin_display = true;
3966 /* The display engine is not coherent with the LLC cache on gen6. As
3967 * a result, we make sure that the pinning that is about to occur is
3968 * done with uncached PTEs. This is lowest common denominator for all
3971 * However for gen6+, we could do better by using the GFDT bit instead
3972 * of uncaching, which would allow us to flush all the LLC-cached data
3973 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
3975 ret = i915_gem_object_set_cache_level(obj,
3976 HAS_WT(obj->base.dev) ? I915_CACHE_WT : I915_CACHE_NONE);
3978 goto err_unpin_display;
3980 /* As the user may map the buffer once pinned in the display plane
3981 * (e.g. libkms for the bootup splash), we have to ensure that we
3982 * always use map_and_fenceable for all scanout buffers.
3984 ret = i915_gem_obj_ggtt_pin(obj, alignment, PIN_MAPPABLE);
3986 goto err_unpin_display;
3988 i915_gem_object_flush_cpu_write_domain(obj);
3990 old_write_domain = obj->base.write_domain;
3991 old_read_domains = obj->base.read_domains;
3993 /* It should now be out of any other write domains, and we can update
3994 * the domain values for our changes.
3996 obj->base.write_domain = 0;
3997 obj->base.read_domains |= I915_GEM_DOMAIN_GTT;
3999 trace_i915_gem_object_change_domain(obj,
4006 WARN_ON(was_pin_display != is_pin_display(obj));
4007 obj->pin_display = was_pin_display;
4012 i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj)
4014 i915_gem_object_ggtt_unpin(obj);
4015 obj->pin_display = is_pin_display(obj);
4019 i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj)
4023 if ((obj->base.read_domains & I915_GEM_GPU_DOMAINS) == 0)
4026 ret = i915_gem_object_wait_rendering(obj, false);
4030 /* Ensure that we invalidate the GPU's caches and TLBs. */
4031 obj->base.read_domains &= ~I915_GEM_GPU_DOMAINS;
4036 * Moves a single object to the CPU read, and possibly write domain.
4038 * This function returns when the move is complete, including waiting on
4042 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write)
4044 uint32_t old_write_domain, old_read_domains;
4047 if (obj->base.write_domain == I915_GEM_DOMAIN_CPU)
4050 ret = i915_gem_object_wait_rendering(obj, !write);
4054 i915_gem_object_retire(obj);
4055 i915_gem_object_flush_gtt_write_domain(obj);
4057 old_write_domain = obj->base.write_domain;
4058 old_read_domains = obj->base.read_domains;
4060 /* Flush the CPU cache if it's still invalid. */
4061 if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) {
4062 i915_gem_clflush_object(obj, false);
4064 obj->base.read_domains |= I915_GEM_DOMAIN_CPU;
4067 /* It should now be out of any other write domains, and we can update
4068 * the domain values for our changes.
4070 BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0);
4072 /* If we're writing through the CPU, then the GPU read domains will
4073 * need to be invalidated at next use.
4076 obj->base.read_domains = I915_GEM_DOMAIN_CPU;
4077 obj->base.write_domain = I915_GEM_DOMAIN_CPU;
4081 intel_fb_obj_invalidate(obj, NULL);
4083 trace_i915_gem_object_change_domain(obj,
4090 /* Throttle our rendering by waiting until the ring has completed our requests
4091 * emitted over 20 msec ago.
4093 * Note that if we were to use the current jiffies each time around the loop,
4094 * we wouldn't escape the function with any frames outstanding if the time to
4095 * render a frame was over 20ms.
4097 * This should get us reasonable parallelism between CPU and GPU but also
4098 * relatively low latency when blocking on a particular request to finish.
4101 i915_gem_ring_throttle(struct drm_device *dev, struct drm_file *file)
4103 struct drm_i915_private *dev_priv = dev->dev_private;
4104 struct drm_i915_file_private *file_priv = file->driver_priv;
4105 unsigned long recent_enough = jiffies - msecs_to_jiffies(20);
4106 struct drm_i915_gem_request *request, *target = NULL;
4107 unsigned reset_counter;
4110 ret = i915_gem_wait_for_error(&dev_priv->gpu_error);
4114 ret = i915_gem_check_wedge(&dev_priv->gpu_error, false);
4118 spin_lock(&file_priv->mm.lock);
4119 list_for_each_entry(request, &file_priv->mm.request_list, client_list) {
4120 if (time_after_eq(request->emitted_jiffies, recent_enough))
4125 reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
4127 i915_gem_request_reference(target);
4128 spin_unlock(&file_priv->mm.lock);
4133 ret = __i915_wait_request(target, reset_counter, true, NULL, NULL);
4135 queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, 0);
4137 mutex_lock(&dev->struct_mutex);
4138 i915_gem_request_unreference(target);
4139 mutex_unlock(&dev->struct_mutex);
4145 i915_vma_misplaced(struct i915_vma *vma, uint32_t alignment, uint64_t flags)
4147 struct drm_i915_gem_object *obj = vma->obj;
4150 vma->node.start & (alignment - 1))
4153 if (flags & PIN_MAPPABLE && !obj->map_and_fenceable)
4156 if (flags & PIN_OFFSET_BIAS &&
4157 vma->node.start < (flags & PIN_OFFSET_MASK))
4164 i915_gem_object_pin_view(struct drm_i915_gem_object *obj,
4165 struct i915_address_space *vm,
4168 const struct i915_ggtt_view *view)
4170 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
4171 struct i915_vma *vma;
4175 if (WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base))
4178 if (WARN_ON(flags & (PIN_GLOBAL | PIN_MAPPABLE) && !i915_is_ggtt(vm)))
4181 if (WARN_ON((flags & (PIN_MAPPABLE | PIN_GLOBAL)) == PIN_MAPPABLE))
4184 vma = i915_gem_obj_to_vma_view(obj, vm, view);
4186 if (WARN_ON(vma->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT))
4189 if (i915_vma_misplaced(vma, alignment, flags)) {
4190 WARN(vma->pin_count,
4191 "bo is already pinned with incorrect alignment:"
4192 " offset=%lx, req.alignment=%x, req.map_and_fenceable=%d,"
4193 " obj->map_and_fenceable=%d\n",
4194 i915_gem_obj_offset_view(obj, vm, view->type),
4196 !!(flags & PIN_MAPPABLE),
4197 obj->map_and_fenceable);
4198 ret = i915_vma_unbind(vma);
4206 bound = vma ? vma->bound : 0;
4207 if (vma == NULL || !drm_mm_node_allocated(&vma->node)) {
4208 vma = i915_gem_object_bind_to_vm(obj, vm, alignment,
4211 return PTR_ERR(vma);
4214 if (flags & PIN_GLOBAL && !(vma->bound & GLOBAL_BIND)) {
4215 ret = i915_vma_bind(vma, obj->cache_level, GLOBAL_BIND);
4220 if ((bound ^ vma->bound) & GLOBAL_BIND) {
4221 bool mappable, fenceable;
4222 u32 fence_size, fence_alignment;
4224 fence_size = i915_gem_get_gtt_size(obj->base.dev,
4227 fence_alignment = i915_gem_get_gtt_alignment(obj->base.dev,
4232 fenceable = (vma->node.size == fence_size &&
4233 (vma->node.start & (fence_alignment - 1)) == 0);
4235 mappable = (vma->node.start + obj->base.size <=
4236 dev_priv->gtt.mappable_end);
4238 obj->map_and_fenceable = mappable && fenceable;
4241 WARN_ON(flags & PIN_MAPPABLE && !obj->map_and_fenceable);
4244 if (flags & PIN_MAPPABLE)
4245 obj->pin_mappable |= true;
4251 i915_gem_object_ggtt_unpin(struct drm_i915_gem_object *obj)
4253 struct i915_vma *vma = i915_gem_obj_to_ggtt(obj);
4256 BUG_ON(vma->pin_count == 0);
4257 BUG_ON(!i915_gem_obj_ggtt_bound(obj));
4259 if (--vma->pin_count == 0)
4260 obj->pin_mappable = false;
4264 i915_gem_object_pin_fence(struct drm_i915_gem_object *obj)
4266 if (obj->fence_reg != I915_FENCE_REG_NONE) {
4267 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
4268 struct i915_vma *ggtt_vma = i915_gem_obj_to_ggtt(obj);
4270 WARN_ON(!ggtt_vma ||
4271 dev_priv->fence_regs[obj->fence_reg].pin_count >
4272 ggtt_vma->pin_count);
4273 dev_priv->fence_regs[obj->fence_reg].pin_count++;
4280 i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj)
4282 if (obj->fence_reg != I915_FENCE_REG_NONE) {
4283 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
4284 WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count <= 0);
4285 dev_priv->fence_regs[obj->fence_reg].pin_count--;
4290 i915_gem_busy_ioctl(struct drm_device *dev, void *data,
4291 struct drm_file *file)
4293 struct drm_i915_gem_busy *args = data;
4294 struct drm_i915_gem_object *obj;
4297 ret = i915_mutex_lock_interruptible(dev);
4301 obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
4302 if (&obj->base == NULL) {
4307 /* Count all active objects as busy, even if they are currently not used
4308 * by the gpu. Users of this interface expect objects to eventually
4309 * become non-busy without any further actions, therefore emit any
4310 * necessary flushes here.
4312 ret = i915_gem_object_flush_active(obj);
4314 args->busy = obj->active;
4315 if (obj->last_read_req) {
4316 struct intel_engine_cs *ring;
4317 BUILD_BUG_ON(I915_NUM_RINGS > 16);
4318 ring = i915_gem_request_get_ring(obj->last_read_req);
4319 args->busy |= intel_ring_flag(ring) << 16;
4322 drm_gem_object_unreference(&obj->base);
4324 mutex_unlock(&dev->struct_mutex);
4329 i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
4330 struct drm_file *file_priv)
4332 return i915_gem_ring_throttle(dev, file_priv);
4336 i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
4337 struct drm_file *file_priv)
4339 struct drm_i915_private *dev_priv = dev->dev_private;
4340 struct drm_i915_gem_madvise *args = data;
4341 struct drm_i915_gem_object *obj;
4344 switch (args->madv) {
4345 case I915_MADV_DONTNEED:
4346 case I915_MADV_WILLNEED:
4352 ret = i915_mutex_lock_interruptible(dev);
4356 obj = to_intel_bo(drm_gem_object_lookup(dev, file_priv, args->handle));
4357 if (&obj->base == NULL) {
4362 if (i915_gem_obj_is_pinned(obj)) {
4368 obj->tiling_mode != I915_TILING_NONE &&
4369 dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES) {
4370 if (obj->madv == I915_MADV_WILLNEED)
4371 i915_gem_object_unpin_pages(obj);
4372 if (args->madv == I915_MADV_WILLNEED)
4373 i915_gem_object_pin_pages(obj);
4376 if (obj->madv != __I915_MADV_PURGED)
4377 obj->madv = args->madv;
4379 /* if the object is no longer attached, discard its backing storage */
4380 if (i915_gem_object_is_purgeable(obj) && obj->pages == NULL)
4381 i915_gem_object_truncate(obj);
4383 args->retained = obj->madv != __I915_MADV_PURGED;
4386 drm_gem_object_unreference(&obj->base);
4388 mutex_unlock(&dev->struct_mutex);
4392 void i915_gem_object_init(struct drm_i915_gem_object *obj,
4393 const struct drm_i915_gem_object_ops *ops)
4395 INIT_LIST_HEAD(&obj->global_list);
4396 INIT_LIST_HEAD(&obj->ring_list);
4397 INIT_LIST_HEAD(&obj->obj_exec_link);
4398 INIT_LIST_HEAD(&obj->vma_list);
4399 INIT_LIST_HEAD(&obj->batch_pool_list);
4403 obj->fence_reg = I915_FENCE_REG_NONE;
4404 obj->madv = I915_MADV_WILLNEED;
4406 i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size);
4409 static const struct drm_i915_gem_object_ops i915_gem_object_ops = {
4410 .get_pages = i915_gem_object_get_pages_gtt,
4411 .put_pages = i915_gem_object_put_pages_gtt,
4414 struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
4417 struct drm_i915_gem_object *obj;
4418 struct address_space *mapping;
4421 obj = i915_gem_object_alloc(dev);
4425 if (drm_gem_object_init(dev, &obj->base, size) != 0) {
4426 i915_gem_object_free(obj);
4430 mask = GFP_HIGHUSER | __GFP_RECLAIMABLE;
4431 if (IS_CRESTLINE(dev) || IS_BROADWATER(dev)) {
4432 /* 965gm cannot relocate objects above 4GiB. */
4433 mask &= ~__GFP_HIGHMEM;
4434 mask |= __GFP_DMA32;
4437 mapping = file_inode(obj->base.filp)->i_mapping;
4438 mapping_set_gfp_mask(mapping, mask);
4440 i915_gem_object_init(obj, &i915_gem_object_ops);
4442 obj->base.write_domain = I915_GEM_DOMAIN_CPU;
4443 obj->base.read_domains = I915_GEM_DOMAIN_CPU;
4446 /* On some devices, we can have the GPU use the LLC (the CPU
4447 * cache) for about a 10% performance improvement
4448 * compared to uncached. Graphics requests other than
4449 * display scanout are coherent with the CPU in
4450 * accessing this cache. This means in this mode we
4451 * don't need to clflush on the CPU side, and on the
4452 * GPU side we only need to flush internal caches to
4453 * get data visible to the CPU.
4455 * However, we maintain the display planes as UC, and so
4456 * need to rebind when first used as such.
4458 obj->cache_level = I915_CACHE_LLC;
4460 obj->cache_level = I915_CACHE_NONE;
4462 trace_i915_gem_object_create(obj);
4467 static bool discard_backing_storage(struct drm_i915_gem_object *obj)
4469 /* If we are the last user of the backing storage (be it shmemfs
4470 * pages or stolen etc), we know that the pages are going to be
4471 * immediately released. In this case, we can then skip copying
4472 * back the contents from the GPU.
4475 if (obj->madv != I915_MADV_WILLNEED)
4478 if (obj->base.filp == NULL)
4481 /* At first glance, this looks racy, but then again so would be
4482 * userspace racing mmap against close. However, the first external
4483 * reference to the filp can only be obtained through the
4484 * i915_gem_mmap_ioctl() which safeguards us against the user
4485 * acquiring such a reference whilst we are in the middle of
4486 * freeing the object.
4488 return atomic_long_read(&obj->base.filp->f_count) == 1;
4491 void i915_gem_free_object(struct drm_gem_object *gem_obj)
4493 struct drm_i915_gem_object *obj = to_intel_bo(gem_obj);
4494 struct drm_device *dev = obj->base.dev;
4495 struct drm_i915_private *dev_priv = dev->dev_private;
4496 struct i915_vma *vma, *next;
4498 intel_runtime_pm_get(dev_priv);
4500 trace_i915_gem_object_destroy(obj);
4502 list_for_each_entry_safe(vma, next, &obj->vma_list, vma_link) {
4506 ret = i915_vma_unbind(vma);
4507 if (WARN_ON(ret == -ERESTARTSYS)) {
4508 bool was_interruptible;
4510 was_interruptible = dev_priv->mm.interruptible;
4511 dev_priv->mm.interruptible = false;
4513 WARN_ON(i915_vma_unbind(vma));
4515 dev_priv->mm.interruptible = was_interruptible;
4519 /* Stolen objects don't hold a ref, but do hold pin count. Fix that up
4520 * before progressing. */
4522 i915_gem_object_unpin_pages(obj);
4524 WARN_ON(obj->frontbuffer_bits);
4526 if (obj->pages && obj->madv == I915_MADV_WILLNEED &&
4527 dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES &&
4528 obj->tiling_mode != I915_TILING_NONE)
4529 i915_gem_object_unpin_pages(obj);
4531 if (WARN_ON(obj->pages_pin_count))
4532 obj->pages_pin_count = 0;
4533 if (discard_backing_storage(obj))
4534 obj->madv = I915_MADV_DONTNEED;
4535 i915_gem_object_put_pages(obj);
4536 i915_gem_object_free_mmap_offset(obj);
4540 if (obj->base.import_attach)
4541 drm_prime_gem_destroy(&obj->base, NULL);
4543 if (obj->ops->release)
4544 obj->ops->release(obj);
4546 drm_gem_object_release(&obj->base);
4547 i915_gem_info_remove_obj(dev_priv, obj->base.size);
4550 i915_gem_object_free(obj);
4552 intel_runtime_pm_put(dev_priv);
4555 struct i915_vma *i915_gem_obj_to_vma_view(struct drm_i915_gem_object *obj,
4556 struct i915_address_space *vm,
4557 const struct i915_ggtt_view *view)
4559 struct i915_vma *vma;
4560 list_for_each_entry(vma, &obj->vma_list, vma_link)
4561 if (vma->vm == vm && vma->ggtt_view.type == view->type)
4567 void i915_gem_vma_destroy(struct i915_vma *vma)
4569 struct i915_address_space *vm = NULL;
4570 WARN_ON(vma->node.allocated);
4572 /* Keep the vma as a placeholder in the execbuffer reservation lists */
4573 if (!list_empty(&vma->exec_list))
4578 if (!i915_is_ggtt(vm))
4579 i915_ppgtt_put(i915_vm_to_ppgtt(vm));
4581 list_del(&vma->vma_link);
4587 i915_gem_stop_ringbuffers(struct drm_device *dev)
4589 struct drm_i915_private *dev_priv = dev->dev_private;
4590 struct intel_engine_cs *ring;
4593 for_each_ring(ring, dev_priv, i)
4594 dev_priv->gt.stop_ring(ring);
4598 i915_gem_suspend(struct drm_device *dev)
4600 struct drm_i915_private *dev_priv = dev->dev_private;
4603 mutex_lock(&dev->struct_mutex);
4604 ret = i915_gpu_idle(dev);
4608 i915_gem_retire_requests(dev);
4610 /* Under UMS, be paranoid and evict. */
4611 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4612 i915_gem_evict_everything(dev);
4614 i915_gem_stop_ringbuffers(dev);
4615 mutex_unlock(&dev->struct_mutex);
4617 cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
4618 cancel_delayed_work_sync(&dev_priv->mm.retire_work);
4619 flush_delayed_work(&dev_priv->mm.idle_work);
4621 /* Assert that we sucessfully flushed all the work and
4622 * reset the GPU back to its idle, low power state.
4624 WARN_ON(dev_priv->mm.busy);
4629 mutex_unlock(&dev->struct_mutex);
4633 int i915_gem_l3_remap(struct intel_engine_cs *ring, int slice)
4635 struct drm_device *dev = ring->dev;
4636 struct drm_i915_private *dev_priv = dev->dev_private;
4637 u32 reg_base = GEN7_L3LOG_BASE + (slice * 0x200);
4638 u32 *remap_info = dev_priv->l3_parity.remap_info[slice];
4641 if (!HAS_L3_DPF(dev) || !remap_info)
4644 ret = intel_ring_begin(ring, GEN7_L3LOG_SIZE / 4 * 3);
4649 * Note: We do not worry about the concurrent register cacheline hang
4650 * here because no other code should access these registers other than
4651 * at initialization time.
4653 for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) {
4654 intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
4655 intel_ring_emit(ring, reg_base + i);
4656 intel_ring_emit(ring, remap_info[i/4]);
4659 intel_ring_advance(ring);
4664 void i915_gem_init_swizzling(struct drm_device *dev)
4666 struct drm_i915_private *dev_priv = dev->dev_private;
4668 if (INTEL_INFO(dev)->gen < 5 ||
4669 dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_NONE)
4672 I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) |
4673 DISP_TILE_SURFACE_SWIZZLING);
4678 I915_WRITE(TILECTL, I915_READ(TILECTL) | TILECTL_SWZCTL);
4680 I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_SNB));
4681 else if (IS_GEN7(dev))
4682 I915_WRITE(ARB_MODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_IVB));
4683 else if (IS_GEN8(dev))
4684 I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_SWIZZLE_BDW));
4690 intel_enable_blt(struct drm_device *dev)
4695 /* The blitter was dysfunctional on early prototypes */
4696 if (IS_GEN6(dev) && dev->pdev->revision < 8) {
4697 DRM_INFO("BLT not supported on this pre-production hardware;"
4698 " graphics performance will be degraded.\n");
4705 static void init_unused_ring(struct drm_device *dev, u32 base)
4707 struct drm_i915_private *dev_priv = dev->dev_private;
4709 I915_WRITE(RING_CTL(base), 0);
4710 I915_WRITE(RING_HEAD(base), 0);
4711 I915_WRITE(RING_TAIL(base), 0);
4712 I915_WRITE(RING_START(base), 0);
4715 static void init_unused_rings(struct drm_device *dev)
4718 init_unused_ring(dev, PRB1_BASE);
4719 init_unused_ring(dev, SRB0_BASE);
4720 init_unused_ring(dev, SRB1_BASE);
4721 init_unused_ring(dev, SRB2_BASE);
4722 init_unused_ring(dev, SRB3_BASE);
4723 } else if (IS_GEN2(dev)) {
4724 init_unused_ring(dev, SRB0_BASE);
4725 init_unused_ring(dev, SRB1_BASE);
4726 } else if (IS_GEN3(dev)) {
4727 init_unused_ring(dev, PRB1_BASE);
4728 init_unused_ring(dev, PRB2_BASE);
4732 int i915_gem_init_rings(struct drm_device *dev)
4734 struct drm_i915_private *dev_priv = dev->dev_private;
4737 ret = intel_init_render_ring_buffer(dev);
4742 ret = intel_init_bsd_ring_buffer(dev);
4744 goto cleanup_render_ring;
4747 if (intel_enable_blt(dev)) {
4748 ret = intel_init_blt_ring_buffer(dev);
4750 goto cleanup_bsd_ring;
4753 if (HAS_VEBOX(dev)) {
4754 ret = intel_init_vebox_ring_buffer(dev);
4756 goto cleanup_blt_ring;
4759 if (HAS_BSD2(dev)) {
4760 ret = intel_init_bsd2_ring_buffer(dev);
4762 goto cleanup_vebox_ring;
4765 ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000));
4767 goto cleanup_bsd2_ring;
4772 intel_cleanup_ring_buffer(&dev_priv->ring[VCS2]);
4774 intel_cleanup_ring_buffer(&dev_priv->ring[VECS]);
4776 intel_cleanup_ring_buffer(&dev_priv->ring[BCS]);
4778 intel_cleanup_ring_buffer(&dev_priv->ring[VCS]);
4779 cleanup_render_ring:
4780 intel_cleanup_ring_buffer(&dev_priv->ring[RCS]);
4786 i915_gem_init_hw(struct drm_device *dev)
4788 struct drm_i915_private *dev_priv = dev->dev_private;
4789 struct intel_engine_cs *ring;
4792 if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt())
4795 if (dev_priv->ellc_size)
4796 I915_WRITE(HSW_IDICR, I915_READ(HSW_IDICR) | IDIHASHMSK(0xf));
4798 if (IS_HASWELL(dev))
4799 I915_WRITE(MI_PREDICATE_RESULT_2, IS_HSW_GT3(dev) ?
4800 LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED);
4802 if (HAS_PCH_NOP(dev)) {
4803 if (IS_IVYBRIDGE(dev)) {
4804 u32 temp = I915_READ(GEN7_MSG_CTL);
4805 temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK);
4806 I915_WRITE(GEN7_MSG_CTL, temp);
4807 } else if (INTEL_INFO(dev)->gen >= 7) {
4808 u32 temp = I915_READ(HSW_NDE_RSTWRN_OPT);
4809 temp &= ~RESET_PCH_HANDSHAKE_ENABLE;
4810 I915_WRITE(HSW_NDE_RSTWRN_OPT, temp);
4814 i915_gem_init_swizzling(dev);
4817 * At least 830 can leave some of the unused rings
4818 * "active" (ie. head != tail) after resume which
4819 * will prevent c3 entry. Makes sure all unused rings
4822 init_unused_rings(dev);
4824 for_each_ring(ring, dev_priv, i) {
4825 ret = ring->init_hw(ring);
4830 for (i = 0; i < NUM_L3_SLICES(dev); i++)
4831 i915_gem_l3_remap(&dev_priv->ring[RCS], i);
4833 ret = i915_ppgtt_init_hw(dev);
4834 if (ret && ret != -EIO) {
4835 DRM_ERROR("PPGTT enable failed %d\n", ret);
4836 i915_gem_cleanup_ringbuffer(dev);
4839 ret = i915_gem_context_enable(dev_priv);
4840 if (ret && ret != -EIO) {
4841 DRM_ERROR("Context enable failed %d\n", ret);
4842 i915_gem_cleanup_ringbuffer(dev);
4850 int i915_gem_init(struct drm_device *dev)
4852 struct drm_i915_private *dev_priv = dev->dev_private;
4855 i915.enable_execlists = intel_sanitize_enable_execlists(dev,
4856 i915.enable_execlists);
4858 mutex_lock(&dev->struct_mutex);
4860 if (IS_VALLEYVIEW(dev)) {
4861 /* VLVA0 (potential hack), BIOS isn't actually waking us */
4862 I915_WRITE(VLV_GTLC_WAKE_CTRL, VLV_GTLC_ALLOWWAKEREQ);
4863 if (wait_for((I915_READ(VLV_GTLC_PW_STATUS) &
4864 VLV_GTLC_ALLOWWAKEACK), 10))
4865 DRM_DEBUG_DRIVER("allow wake ack timed out\n");
4868 if (!i915.enable_execlists) {
4869 dev_priv->gt.do_execbuf = i915_gem_ringbuffer_submission;
4870 dev_priv->gt.init_rings = i915_gem_init_rings;
4871 dev_priv->gt.cleanup_ring = intel_cleanup_ring_buffer;
4872 dev_priv->gt.stop_ring = intel_stop_ring_buffer;
4874 dev_priv->gt.do_execbuf = intel_execlists_submission;
4875 dev_priv->gt.init_rings = intel_logical_rings_init;
4876 dev_priv->gt.cleanup_ring = intel_logical_ring_cleanup;
4877 dev_priv->gt.stop_ring = intel_logical_ring_stop;
4880 ret = i915_gem_init_userptr(dev);
4884 i915_gem_init_global_gtt(dev);
4886 ret = i915_gem_context_init(dev);
4890 ret = dev_priv->gt.init_rings(dev);
4894 ret = i915_gem_init_hw(dev);
4896 /* Allow ring initialisation to fail by marking the GPU as
4897 * wedged. But we only want to do this where the GPU is angry,
4898 * for all other failure, such as an allocation failure, bail.
4900 DRM_ERROR("Failed to initialize GPU, declaring it wedged\n");
4901 atomic_set_mask(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
4906 mutex_unlock(&dev->struct_mutex);
4912 i915_gem_cleanup_ringbuffer(struct drm_device *dev)
4914 struct drm_i915_private *dev_priv = dev->dev_private;
4915 struct intel_engine_cs *ring;
4918 for_each_ring(ring, dev_priv, i)
4919 dev_priv->gt.cleanup_ring(ring);
4923 init_ring_lists(struct intel_engine_cs *ring)
4925 INIT_LIST_HEAD(&ring->active_list);
4926 INIT_LIST_HEAD(&ring->request_list);
4929 void i915_init_vm(struct drm_i915_private *dev_priv,
4930 struct i915_address_space *vm)
4932 if (!i915_is_ggtt(vm))
4933 drm_mm_init(&vm->mm, vm->start, vm->total);
4934 vm->dev = dev_priv->dev;
4935 INIT_LIST_HEAD(&vm->active_list);
4936 INIT_LIST_HEAD(&vm->inactive_list);
4937 INIT_LIST_HEAD(&vm->global_link);
4938 list_add_tail(&vm->global_link, &dev_priv->vm_list);
4942 i915_gem_load(struct drm_device *dev)
4944 struct drm_i915_private *dev_priv = dev->dev_private;
4948 kmem_cache_create("i915_gem_object",
4949 sizeof(struct drm_i915_gem_object), 0,
4953 INIT_LIST_HEAD(&dev_priv->vm_list);
4954 i915_init_vm(dev_priv, &dev_priv->gtt.base);
4956 INIT_LIST_HEAD(&dev_priv->context_list);
4957 INIT_LIST_HEAD(&dev_priv->mm.unbound_list);
4958 INIT_LIST_HEAD(&dev_priv->mm.bound_list);
4959 INIT_LIST_HEAD(&dev_priv->mm.fence_list);
4960 for (i = 0; i < I915_NUM_RINGS; i++)
4961 init_ring_lists(&dev_priv->ring[i]);
4962 for (i = 0; i < I915_MAX_NUM_FENCES; i++)
4963 INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list);
4964 INIT_DELAYED_WORK(&dev_priv->mm.retire_work,
4965 i915_gem_retire_work_handler);
4966 INIT_DELAYED_WORK(&dev_priv->mm.idle_work,
4967 i915_gem_idle_work_handler);
4968 init_waitqueue_head(&dev_priv->gpu_error.reset_queue);
4970 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
4971 if (!drm_core_check_feature(dev, DRIVER_MODESET) && IS_GEN3(dev)) {
4972 I915_WRITE(MI_ARB_STATE,
4973 _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE));
4976 dev_priv->relative_constants_mode = I915_EXEC_CONSTANTS_REL_GENERAL;
4978 /* Old X drivers will take 0-2 for front, back, depth buffers */
4979 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4980 dev_priv->fence_reg_start = 3;
4982 if (INTEL_INFO(dev)->gen >= 7 && !IS_VALLEYVIEW(dev))
4983 dev_priv->num_fence_regs = 32;
4984 else if (INTEL_INFO(dev)->gen >= 4 || IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
4985 dev_priv->num_fence_regs = 16;
4987 dev_priv->num_fence_regs = 8;
4989 /* Initialize fence registers to zero */
4990 INIT_LIST_HEAD(&dev_priv->mm.fence_list);
4991 i915_gem_restore_fences(dev);
4993 i915_gem_detect_bit_6_swizzle(dev);
4994 init_waitqueue_head(&dev_priv->pending_flip_queue);
4996 dev_priv->mm.interruptible = true;
4998 dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan;
4999 dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count;
5000 dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS;
5001 register_shrinker(&dev_priv->mm.shrinker);
5003 dev_priv->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom;
5004 register_oom_notifier(&dev_priv->mm.oom_notifier);
5006 i915_gem_batch_pool_init(dev, &dev_priv->mm.batch_pool);
5008 mutex_init(&dev_priv->fb_tracking.lock);
5011 void i915_gem_release(struct drm_device *dev, struct drm_file *file)
5013 struct drm_i915_file_private *file_priv = file->driver_priv;
5015 cancel_delayed_work_sync(&file_priv->mm.idle_work);
5017 /* Clean up our request list when the client is going away, so that
5018 * later retire_requests won't dereference our soon-to-be-gone
5021 spin_lock(&file_priv->mm.lock);
5022 while (!list_empty(&file_priv->mm.request_list)) {
5023 struct drm_i915_gem_request *request;
5025 request = list_first_entry(&file_priv->mm.request_list,
5026 struct drm_i915_gem_request,
5028 list_del(&request->client_list);
5029 request->file_priv = NULL;
5031 spin_unlock(&file_priv->mm.lock);
5035 i915_gem_file_idle_work_handler(struct work_struct *work)
5037 struct drm_i915_file_private *file_priv =
5038 container_of(work, typeof(*file_priv), mm.idle_work.work);
5040 atomic_set(&file_priv->rps_wait_boost, false);
5043 int i915_gem_open(struct drm_device *dev, struct drm_file *file)
5045 struct drm_i915_file_private *file_priv;
5048 DRM_DEBUG_DRIVER("\n");
5050 file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
5054 file->driver_priv = file_priv;
5055 file_priv->dev_priv = dev->dev_private;
5056 file_priv->file = file;
5058 spin_lock_init(&file_priv->mm.lock);
5059 INIT_LIST_HEAD(&file_priv->mm.request_list);
5060 INIT_DELAYED_WORK(&file_priv->mm.idle_work,
5061 i915_gem_file_idle_work_handler);
5063 ret = i915_gem_context_open(dev, file);
5071 * i915_gem_track_fb - update frontbuffer tracking
5072 * old: current GEM buffer for the frontbuffer slots
5073 * new: new GEM buffer for the frontbuffer slots
5074 * frontbuffer_bits: bitmask of frontbuffer slots
5076 * This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them
5077 * from @old and setting them in @new. Both @old and @new can be NULL.
5079 void i915_gem_track_fb(struct drm_i915_gem_object *old,
5080 struct drm_i915_gem_object *new,
5081 unsigned frontbuffer_bits)
5084 WARN_ON(!mutex_is_locked(&old->base.dev->struct_mutex));
5085 WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits));
5086 old->frontbuffer_bits &= ~frontbuffer_bits;
5090 WARN_ON(!mutex_is_locked(&new->base.dev->struct_mutex));
5091 WARN_ON(new->frontbuffer_bits & frontbuffer_bits);
5092 new->frontbuffer_bits |= frontbuffer_bits;
5096 static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task)
5098 if (!mutex_is_locked(mutex))
5101 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES)
5102 return mutex->owner == task;
5104 /* Since UP may be pre-empted, we cannot assume that we own the lock */
5109 static bool i915_gem_shrinker_lock(struct drm_device *dev, bool *unlock)
5111 if (!mutex_trylock(&dev->struct_mutex)) {
5112 if (!mutex_is_locked_by(&dev->struct_mutex, current))
5115 if (to_i915(dev)->mm.shrinker_no_lock_stealing)
5125 static int num_vma_bound(struct drm_i915_gem_object *obj)
5127 struct i915_vma *vma;
5130 list_for_each_entry(vma, &obj->vma_list, vma_link)
5131 if (drm_mm_node_allocated(&vma->node))
5137 static unsigned long
5138 i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc)
5140 struct drm_i915_private *dev_priv =
5141 container_of(shrinker, struct drm_i915_private, mm.shrinker);
5142 struct drm_device *dev = dev_priv->dev;
5143 struct drm_i915_gem_object *obj;
5144 unsigned long count;
5147 if (!i915_gem_shrinker_lock(dev, &unlock))
5151 list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list)
5152 if (obj->pages_pin_count == 0)
5153 count += obj->base.size >> PAGE_SHIFT;
5155 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
5156 if (!i915_gem_obj_is_pinned(obj) &&
5157 obj->pages_pin_count == num_vma_bound(obj))
5158 count += obj->base.size >> PAGE_SHIFT;
5162 mutex_unlock(&dev->struct_mutex);
5167 /* All the new VM stuff */
5168 unsigned long i915_gem_obj_offset_view(struct drm_i915_gem_object *o,
5169 struct i915_address_space *vm,
5170 enum i915_ggtt_view_type view)
5172 struct drm_i915_private *dev_priv = o->base.dev->dev_private;
5173 struct i915_vma *vma;
5175 WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base);
5177 list_for_each_entry(vma, &o->vma_list, vma_link) {
5178 if (vma->vm == vm && vma->ggtt_view.type == view)
5179 return vma->node.start;
5182 WARN(1, "%s vma for this object not found.\n",
5183 i915_is_ggtt(vm) ? "global" : "ppgtt");
5187 bool i915_gem_obj_bound_view(struct drm_i915_gem_object *o,
5188 struct i915_address_space *vm,
5189 enum i915_ggtt_view_type view)
5191 struct i915_vma *vma;
5193 list_for_each_entry(vma, &o->vma_list, vma_link)
5194 if (vma->vm == vm &&
5195 vma->ggtt_view.type == view &&
5196 drm_mm_node_allocated(&vma->node))
5202 bool i915_gem_obj_bound_any(struct drm_i915_gem_object *o)
5204 struct i915_vma *vma;
5206 list_for_each_entry(vma, &o->vma_list, vma_link)
5207 if (drm_mm_node_allocated(&vma->node))
5213 unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o,
5214 struct i915_address_space *vm)
5216 struct drm_i915_private *dev_priv = o->base.dev->dev_private;
5217 struct i915_vma *vma;
5219 WARN_ON(vm == &dev_priv->mm.aliasing_ppgtt->base);
5221 BUG_ON(list_empty(&o->vma_list));
5223 list_for_each_entry(vma, &o->vma_list, vma_link)
5225 return vma->node.size;
5230 static unsigned long
5231 i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc)
5233 struct drm_i915_private *dev_priv =
5234 container_of(shrinker, struct drm_i915_private, mm.shrinker);
5235 struct drm_device *dev = dev_priv->dev;
5236 unsigned long freed;
5239 if (!i915_gem_shrinker_lock(dev, &unlock))
5242 freed = i915_gem_shrink(dev_priv,
5245 I915_SHRINK_UNBOUND |
5246 I915_SHRINK_PURGEABLE);
5247 if (freed < sc->nr_to_scan)
5248 freed += i915_gem_shrink(dev_priv,
5249 sc->nr_to_scan - freed,
5251 I915_SHRINK_UNBOUND);
5253 mutex_unlock(&dev->struct_mutex);
5259 i915_gem_shrinker_oom(struct notifier_block *nb, unsigned long event, void *ptr)
5261 struct drm_i915_private *dev_priv =
5262 container_of(nb, struct drm_i915_private, mm.oom_notifier);
5263 struct drm_device *dev = dev_priv->dev;
5264 struct drm_i915_gem_object *obj;
5265 unsigned long timeout = msecs_to_jiffies(5000) + 1;
5266 unsigned long pinned, bound, unbound, freed_pages;
5267 bool was_interruptible;
5270 while (!i915_gem_shrinker_lock(dev, &unlock) && --timeout) {
5271 schedule_timeout_killable(1);
5272 if (fatal_signal_pending(current))
5276 pr_err("Unable to purge GPU memory due lock contention.\n");
5280 was_interruptible = dev_priv->mm.interruptible;
5281 dev_priv->mm.interruptible = false;
5283 freed_pages = i915_gem_shrink_all(dev_priv);
5285 dev_priv->mm.interruptible = was_interruptible;
5287 /* Because we may be allocating inside our own driver, we cannot
5288 * assert that there are no objects with pinned pages that are not
5289 * being pointed to by hardware.
5291 unbound = bound = pinned = 0;
5292 list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_list) {
5293 if (!obj->base.filp) /* not backed by a freeable object */
5296 if (obj->pages_pin_count)
5297 pinned += obj->base.size;
5299 unbound += obj->base.size;
5301 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
5302 if (!obj->base.filp)
5305 if (obj->pages_pin_count)
5306 pinned += obj->base.size;
5308 bound += obj->base.size;
5312 mutex_unlock(&dev->struct_mutex);
5314 if (freed_pages || unbound || bound)
5315 pr_info("Purging GPU memory, %lu bytes freed, %lu bytes still pinned.\n",
5316 freed_pages << PAGE_SHIFT, pinned);
5317 if (unbound || bound)
5318 pr_err("%lu and %lu bytes still available in the "
5319 "bound and unbound GPU page lists.\n",
5322 *(unsigned long *)ptr += freed_pages;
5326 struct i915_vma *i915_gem_obj_to_ggtt(struct drm_i915_gem_object *obj)
5328 struct i915_address_space *ggtt = i915_obj_to_ggtt(obj);
5329 struct i915_vma *vma;
5331 list_for_each_entry(vma, &obj->vma_list, vma_link)
5332 if (vma->vm == ggtt &&
5333 vma->ggtt_view.type == I915_GGTT_VIEW_NORMAL)