2 * Copyright © 2016 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
25 #include <drm/drm_gem.h>
27 #include "display/intel_frontbuffer.h"
29 #include "gt/intel_engine.h"
32 #include "i915_globals.h"
35 static struct i915_global_vma {
36 struct i915_global base;
37 struct kmem_cache *slab_vmas;
40 struct i915_vma *i915_vma_alloc(void)
42 return kmem_cache_zalloc(global.slab_vmas, GFP_KERNEL);
45 void i915_vma_free(struct i915_vma *vma)
47 return kmem_cache_free(global.slab_vmas, vma);
50 #if IS_ENABLED(CONFIG_DRM_I915_ERRLOG_GEM) && IS_ENABLED(CONFIG_DRM_DEBUG_MM)
52 #include <linux/stackdepot.h>
54 static void vma_print_allocator(struct i915_vma *vma, const char *reason)
56 unsigned long *entries;
57 unsigned int nr_entries;
60 if (!vma->node.stack) {
61 DRM_DEBUG_DRIVER("vma.node [%08llx + %08llx] %s: unknown owner\n",
62 vma->node.start, vma->node.size, reason);
66 nr_entries = stack_depot_fetch(vma->node.stack, &entries);
67 stack_trace_snprint(buf, sizeof(buf), entries, nr_entries, 0);
68 DRM_DEBUG_DRIVER("vma.node [%08llx + %08llx] %s: inserted at %s\n",
69 vma->node.start, vma->node.size, reason, buf);
74 static void vma_print_allocator(struct i915_vma *vma, const char *reason)
80 static void obj_bump_mru(struct drm_i915_gem_object *obj)
82 struct drm_i915_private *i915 = to_i915(obj->base.dev);
85 spin_lock_irqsave(&i915->mm.obj_lock, flags);
86 list_move_tail(&obj->mm.link, &i915->mm.shrink_list);
87 spin_unlock_irqrestore(&i915->mm.obj_lock, flags);
89 obj->mm.dirty = true; /* be paranoid */
92 static void __i915_vma_retire(struct i915_active *ref)
94 struct i915_vma *vma = container_of(ref, typeof(*vma), active);
95 struct drm_i915_gem_object *obj = vma->obj;
97 GEM_BUG_ON(!i915_gem_object_is_active(obj));
98 if (--obj->active_count)
101 /* Prune the shared fence arrays iff completely idle (inc. external) */
102 if (reservation_object_trylock(obj->base.resv)) {
103 if (reservation_object_test_signaled_rcu(obj->base.resv, true))
104 reservation_object_add_excl_fence(obj->base.resv, NULL);
105 reservation_object_unlock(obj->base.resv);
109 * Bump our place on the bound list to keep it roughly in LRU order
110 * so that we don't steal from recently used but inactive objects
111 * (unless we are forced to ofc!)
113 if (i915_gem_object_is_shrinkable(obj))
116 i915_gem_object_put(obj); /* and drop the active reference */
119 static struct i915_vma *
120 vma_create(struct drm_i915_gem_object *obj,
121 struct i915_address_space *vm,
122 const struct i915_ggtt_view *view)
124 struct i915_vma *vma;
125 struct rb_node *rb, **p;
127 /* The aliasing_ppgtt should never be used directly! */
128 GEM_BUG_ON(vm == &vm->i915->mm.aliasing_ppgtt->vm);
130 vma = i915_vma_alloc();
132 return ERR_PTR(-ENOMEM);
135 vma->ops = &vm->vma_ops;
137 vma->resv = obj->base.resv;
138 vma->size = obj->base.size;
139 vma->display_alignment = I915_GTT_MIN_ALIGNMENT;
141 i915_active_init(vm->i915, &vma->active, __i915_vma_retire);
142 INIT_ACTIVE_REQUEST(&vma->last_fence);
144 INIT_LIST_HEAD(&vma->closed_link);
146 if (view && view->type != I915_GGTT_VIEW_NORMAL) {
147 vma->ggtt_view = *view;
148 if (view->type == I915_GGTT_VIEW_PARTIAL) {
149 GEM_BUG_ON(range_overflows_t(u64,
150 view->partial.offset,
152 obj->base.size >> PAGE_SHIFT));
153 vma->size = view->partial.size;
154 vma->size <<= PAGE_SHIFT;
155 GEM_BUG_ON(vma->size > obj->base.size);
156 } else if (view->type == I915_GGTT_VIEW_ROTATED) {
157 vma->size = intel_rotation_info_size(&view->rotated);
158 vma->size <<= PAGE_SHIFT;
159 } else if (view->type == I915_GGTT_VIEW_REMAPPED) {
160 vma->size = intel_remapped_info_size(&view->remapped);
161 vma->size <<= PAGE_SHIFT;
165 if (unlikely(vma->size > vm->total))
168 GEM_BUG_ON(!IS_ALIGNED(vma->size, I915_GTT_PAGE_SIZE));
170 if (i915_is_ggtt(vm)) {
171 if (unlikely(overflows_type(vma->size, u32)))
174 vma->fence_size = i915_gem_fence_size(vm->i915, vma->size,
175 i915_gem_object_get_tiling(obj),
176 i915_gem_object_get_stride(obj));
177 if (unlikely(vma->fence_size < vma->size || /* overflow */
178 vma->fence_size > vm->total))
181 GEM_BUG_ON(!IS_ALIGNED(vma->fence_size, I915_GTT_MIN_ALIGNMENT));
183 vma->fence_alignment = i915_gem_fence_alignment(vm->i915, vma->size,
184 i915_gem_object_get_tiling(obj),
185 i915_gem_object_get_stride(obj));
186 GEM_BUG_ON(!is_power_of_2(vma->fence_alignment));
188 vma->flags |= I915_VMA_GGTT;
191 spin_lock(&obj->vma.lock);
194 p = &obj->vma.tree.rb_node;
196 struct i915_vma *pos;
200 pos = rb_entry(rb, struct i915_vma, obj_node);
203 * If the view already exists in the tree, another thread
204 * already created a matching vma, so return the older instance
205 * and dispose of ours.
207 cmp = i915_vma_compare(pos, vm, view);
209 spin_unlock(&obj->vma.lock);
219 rb_link_node(&vma->obj_node, rb, p);
220 rb_insert_color(&vma->obj_node, &obj->vma.tree);
222 if (i915_vma_is_ggtt(vma))
224 * We put the GGTT vma at the start of the vma-list, followed
225 * by the ppGGTT vma. This allows us to break early when
226 * iterating over only the GGTT vma for an object, see
227 * for_each_ggtt_vma()
229 list_add(&vma->obj_link, &obj->vma.list);
231 list_add_tail(&vma->obj_link, &obj->vma.list);
233 spin_unlock(&obj->vma.lock);
235 mutex_lock(&vm->mutex);
236 list_add(&vma->vm_link, &vm->unbound_list);
237 mutex_unlock(&vm->mutex);
243 return ERR_PTR(-E2BIG);
246 static struct i915_vma *
247 vma_lookup(struct drm_i915_gem_object *obj,
248 struct i915_address_space *vm,
249 const struct i915_ggtt_view *view)
253 rb = obj->vma.tree.rb_node;
255 struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node);
258 cmp = i915_vma_compare(vma, vm, view);
272 * i915_vma_instance - return the singleton instance of the VMA
273 * @obj: parent &struct drm_i915_gem_object to be mapped
274 * @vm: address space in which the mapping is located
275 * @view: additional mapping requirements
277 * i915_vma_instance() looks up an existing VMA of the @obj in the @vm with
278 * the same @view characteristics. If a match is not found, one is created.
279 * Once created, the VMA is kept until either the object is freed, or the
280 * address space is closed.
282 * Must be called with struct_mutex held.
284 * Returns the vma, or an error pointer.
287 i915_vma_instance(struct drm_i915_gem_object *obj,
288 struct i915_address_space *vm,
289 const struct i915_ggtt_view *view)
291 struct i915_vma *vma;
293 GEM_BUG_ON(view && !i915_is_ggtt(vm));
294 GEM_BUG_ON(vm->closed);
296 spin_lock(&obj->vma.lock);
297 vma = vma_lookup(obj, vm, view);
298 spin_unlock(&obj->vma.lock);
300 /* vma_create() will resolve the race if another creates the vma */
302 vma = vma_create(obj, vm, view);
304 GEM_BUG_ON(!IS_ERR(vma) && i915_vma_compare(vma, vm, view));
309 * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space.
311 * @cache_level: mapping cache level
312 * @flags: flags like global or local mapping
314 * DMA addresses are taken from the scatter-gather table of this object (or of
315 * this VMA in case of non-default GGTT views) and PTE entries set up.
316 * Note that DMA addresses are also the only part of the SG table we care about.
318 int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
325 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
326 GEM_BUG_ON(vma->size > vma->node.size);
328 if (GEM_DEBUG_WARN_ON(range_overflows(vma->node.start,
333 if (GEM_DEBUG_WARN_ON(!flags))
337 if (flags & PIN_GLOBAL)
338 bind_flags |= I915_VMA_GLOBAL_BIND;
339 if (flags & PIN_USER)
340 bind_flags |= I915_VMA_LOCAL_BIND;
342 vma_flags = vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
343 if (flags & PIN_UPDATE)
344 bind_flags |= vma_flags;
346 bind_flags &= ~vma_flags;
350 GEM_BUG_ON(!vma->pages);
352 trace_i915_vma_bind(vma, bind_flags);
353 ret = vma->ops->bind_vma(vma, cache_level, bind_flags);
357 vma->flags |= bind_flags;
361 void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
366 /* Access through the GTT requires the device to be awake. */
367 assert_rpm_wakelock_held(&vma->vm->i915->runtime_pm);
369 lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
370 if (WARN_ON(!i915_vma_is_map_and_fenceable(vma))) {
375 GEM_BUG_ON(!i915_vma_is_ggtt(vma));
376 GEM_BUG_ON((vma->flags & I915_VMA_GLOBAL_BIND) == 0);
380 ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->iomap,
393 err = i915_vma_pin_fence(vma);
397 i915_vma_set_ggtt_write(vma);
401 __i915_vma_unpin(vma);
403 return IO_ERR_PTR(err);
406 void i915_vma_flush_writes(struct i915_vma *vma)
408 if (!i915_vma_has_ggtt_write(vma))
411 i915_gem_flush_ggtt_writes(vma->vm->i915);
413 i915_vma_unset_ggtt_write(vma);
416 void i915_vma_unpin_iomap(struct i915_vma *vma)
418 lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
420 GEM_BUG_ON(vma->iomap == NULL);
422 i915_vma_flush_writes(vma);
424 i915_vma_unpin_fence(vma);
428 void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags)
430 struct i915_vma *vma;
431 struct drm_i915_gem_object *obj;
433 vma = fetch_and_zero(p_vma);
443 if (flags & I915_VMA_RELEASE_MAP)
444 i915_gem_object_unpin_map(obj);
446 i915_gem_object_put(obj);
449 bool i915_vma_misplaced(const struct i915_vma *vma,
450 u64 size, u64 alignment, u64 flags)
452 if (!drm_mm_node_allocated(&vma->node))
455 if (vma->node.size < size)
458 GEM_BUG_ON(alignment && !is_power_of_2(alignment));
459 if (alignment && !IS_ALIGNED(vma->node.start, alignment))
462 if (flags & PIN_MAPPABLE && !i915_vma_is_map_and_fenceable(vma))
465 if (flags & PIN_OFFSET_BIAS &&
466 vma->node.start < (flags & PIN_OFFSET_MASK))
469 if (flags & PIN_OFFSET_FIXED &&
470 vma->node.start != (flags & PIN_OFFSET_MASK))
476 void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)
478 bool mappable, fenceable;
480 GEM_BUG_ON(!i915_vma_is_ggtt(vma));
481 GEM_BUG_ON(!vma->fence_size);
483 fenceable = (vma->node.size >= vma->fence_size &&
484 IS_ALIGNED(vma->node.start, vma->fence_alignment));
486 mappable = vma->node.start + vma->fence_size <= i915_vm_to_ggtt(vma->vm)->mappable_end;
488 if (mappable && fenceable)
489 vma->flags |= I915_VMA_CAN_FENCE;
491 vma->flags &= ~I915_VMA_CAN_FENCE;
494 static bool color_differs(struct drm_mm_node *node, unsigned long color)
496 return node->allocated && node->color != color;
499 bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level)
501 struct drm_mm_node *node = &vma->node;
502 struct drm_mm_node *other;
505 * On some machines we have to be careful when putting differing types
506 * of snoopable memory together to avoid the prefetcher crossing memory
507 * domains and dying. During vm initialisation, we decide whether or not
508 * these constraints apply and set the drm_mm.color_adjust
511 if (vma->vm->mm.color_adjust == NULL)
514 /* Only valid to be called on an already inserted vma */
515 GEM_BUG_ON(!drm_mm_node_allocated(node));
516 GEM_BUG_ON(list_empty(&node->node_list));
518 other = list_prev_entry(node, node_list);
519 if (color_differs(other, cache_level) && !drm_mm_hole_follows(other))
522 other = list_next_entry(node, node_list);
523 if (color_differs(other, cache_level) && !drm_mm_hole_follows(node))
529 static void assert_bind_count(const struct drm_i915_gem_object *obj)
532 * Combine the assertion that the object is bound and that we have
533 * pinned its pages. But we should never have bound the object
534 * more than we have pinned its pages. (For complete accuracy, we
535 * assume that no else is pinning the pages, but as a rough assertion
536 * that we will not run into problems later, this will do!)
538 GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < atomic_read(&obj->bind_count));
542 * i915_vma_insert - finds a slot for the vma in its address space
544 * @size: requested size in bytes (can be larger than the VMA)
545 * @alignment: required alignment
546 * @flags: mask of PIN_* flags to use
548 * First we try to allocate some free space that meets the requirements for
549 * the VMA. Failiing that, if the flags permit, it will evict an old VMA,
550 * preferrably the oldest idle entry to make room for the new VMA.
553 * 0 on success, negative error code otherwise.
556 i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
558 struct drm_i915_private *dev_priv = vma->vm->i915;
559 unsigned int cache_level;
563 GEM_BUG_ON(i915_vma_is_closed(vma));
564 GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
565 GEM_BUG_ON(drm_mm_node_allocated(&vma->node));
567 size = max(size, vma->size);
568 alignment = max(alignment, vma->display_alignment);
569 if (flags & PIN_MAPPABLE) {
570 size = max_t(typeof(size), size, vma->fence_size);
571 alignment = max_t(typeof(alignment),
572 alignment, vma->fence_alignment);
575 GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));
576 GEM_BUG_ON(!IS_ALIGNED(alignment, I915_GTT_MIN_ALIGNMENT));
577 GEM_BUG_ON(!is_power_of_2(alignment));
579 start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;
580 GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE));
582 end = vma->vm->total;
583 if (flags & PIN_MAPPABLE)
584 end = min_t(u64, end, dev_priv->ggtt.mappable_end);
585 if (flags & PIN_ZONE_4G)
586 end = min_t(u64, end, (1ULL << 32) - I915_GTT_PAGE_SIZE);
587 GEM_BUG_ON(!IS_ALIGNED(end, I915_GTT_PAGE_SIZE));
589 /* If binding the object/GGTT view requires more space than the entire
590 * aperture has, reject it early before evicting everything in a vain
591 * attempt to find space.
594 DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu > %s aperture=%llu\n",
595 size, flags & PIN_MAPPABLE ? "mappable" : "total",
601 ret = i915_gem_object_pin_pages(vma->obj);
605 cache_level = vma->obj->cache_level;
610 GEM_BUG_ON(vma->pages);
612 ret = vma->ops->set_pages(vma);
616 if (flags & PIN_OFFSET_FIXED) {
617 u64 offset = flags & PIN_OFFSET_MASK;
618 if (!IS_ALIGNED(offset, alignment) ||
619 range_overflows(offset, size, end)) {
624 ret = i915_gem_gtt_reserve(vma->vm, &vma->node,
625 size, offset, cache_level,
631 * We only support huge gtt pages through the 48b PPGTT,
632 * however we also don't want to force any alignment for
633 * objects which need to be tightly packed into the low 32bits.
635 * Note that we assume that GGTT are limited to 4GiB for the
636 * forseeable future. See also i915_ggtt_offset().
638 if (upper_32_bits(end - 1) &&
639 vma->page_sizes.sg > I915_GTT_PAGE_SIZE) {
641 * We can't mix 64K and 4K PTEs in the same page-table
642 * (2M block), and so to avoid the ugliness and
643 * complexity of coloring we opt for just aligning 64K
647 rounddown_pow_of_two(vma->page_sizes.sg |
648 I915_GTT_PAGE_SIZE_2M);
651 * Check we don't expand for the limited Global GTT
652 * (mappable aperture is even more precious!). This
653 * also checks that we exclude the aliasing-ppgtt.
655 GEM_BUG_ON(i915_vma_is_ggtt(vma));
657 alignment = max(alignment, page_alignment);
659 if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K)
660 size = round_up(size, I915_GTT_PAGE_SIZE_2M);
663 ret = i915_gem_gtt_insert(vma->vm, &vma->node,
664 size, alignment, cache_level,
669 GEM_BUG_ON(vma->node.start < start);
670 GEM_BUG_ON(vma->node.start + vma->node.size > end);
672 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
673 GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, cache_level));
675 mutex_lock(&vma->vm->mutex);
676 list_move_tail(&vma->vm_link, &vma->vm->bound_list);
677 mutex_unlock(&vma->vm->mutex);
680 atomic_inc(&vma->obj->bind_count);
681 assert_bind_count(vma->obj);
687 vma->ops->clear_pages(vma);
690 i915_gem_object_unpin_pages(vma->obj);
695 i915_vma_remove(struct i915_vma *vma)
697 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
698 GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
700 vma->ops->clear_pages(vma);
702 mutex_lock(&vma->vm->mutex);
703 drm_mm_remove_node(&vma->node);
704 list_move_tail(&vma->vm_link, &vma->vm->unbound_list);
705 mutex_unlock(&vma->vm->mutex);
708 * Since the unbound list is global, only move to that list if
709 * no more VMAs exist.
712 struct drm_i915_gem_object *obj = vma->obj;
714 atomic_dec(&obj->bind_count);
717 * And finally now the object is completely decoupled from this
718 * vma, we can drop its hold on the backing storage and allow
719 * it to be reaped by the shrinker.
721 i915_gem_object_unpin_pages(obj);
722 assert_bind_count(obj);
726 int __i915_vma_do_pin(struct i915_vma *vma,
727 u64 size, u64 alignment, u64 flags)
729 const unsigned int bound = vma->flags;
732 lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
733 GEM_BUG_ON((flags & (PIN_GLOBAL | PIN_USER)) == 0);
734 GEM_BUG_ON((flags & PIN_GLOBAL) && !i915_vma_is_ggtt(vma));
736 if (WARN_ON(bound & I915_VMA_PIN_OVERFLOW)) {
741 if ((bound & I915_VMA_BIND_MASK) == 0) {
742 ret = i915_vma_insert(vma, size, alignment, flags);
746 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
748 ret = i915_vma_bind(vma, vma->obj ? vma->obj->cache_level : 0, flags);
752 GEM_BUG_ON((vma->flags & I915_VMA_BIND_MASK) == 0);
754 if ((bound ^ vma->flags) & I915_VMA_GLOBAL_BIND)
755 __i915_vma_set_map_and_fenceable(vma);
757 GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));
761 if ((bound & I915_VMA_BIND_MASK) == 0) {
762 i915_vma_remove(vma);
763 GEM_BUG_ON(vma->pages);
764 GEM_BUG_ON(vma->flags & I915_VMA_BIND_MASK);
767 __i915_vma_unpin(vma);
771 void i915_vma_close(struct i915_vma *vma)
773 struct drm_i915_private *i915 = vma->vm->i915;
776 GEM_BUG_ON(i915_vma_is_closed(vma));
779 * We defer actually closing, unbinding and destroying the VMA until
780 * the next idle point, or if the object is freed in the meantime. By
781 * postponing the unbind, we allow for it to be resurrected by the
782 * client, avoiding the work required to rebind the VMA. This is
783 * advantageous for DRI, where the client/server pass objects
784 * between themselves, temporarily opening a local VMA to the
785 * object, and then closing it again. The same object is then reused
786 * on the next frame (or two, depending on the depth of the swap queue)
787 * causing us to rebind the VMA once more. This ends up being a lot
788 * of wasted work for the steady state.
790 spin_lock_irqsave(&i915->gt.closed_lock, flags);
791 list_add(&vma->closed_link, &i915->gt.closed_vma);
792 spin_unlock_irqrestore(&i915->gt.closed_lock, flags);
795 static void __i915_vma_remove_closed(struct i915_vma *vma)
797 struct drm_i915_private *i915 = vma->vm->i915;
799 if (!i915_vma_is_closed(vma))
802 spin_lock_irq(&i915->gt.closed_lock);
803 list_del_init(&vma->closed_link);
804 spin_unlock_irq(&i915->gt.closed_lock);
807 void i915_vma_reopen(struct i915_vma *vma)
809 __i915_vma_remove_closed(vma);
812 static void __i915_vma_destroy(struct i915_vma *vma)
814 GEM_BUG_ON(vma->node.allocated);
815 GEM_BUG_ON(vma->fence);
817 GEM_BUG_ON(i915_active_request_isset(&vma->last_fence));
819 mutex_lock(&vma->vm->mutex);
820 list_del(&vma->vm_link);
821 mutex_unlock(&vma->vm->mutex);
824 struct drm_i915_gem_object *obj = vma->obj;
826 spin_lock(&obj->vma.lock);
827 list_del(&vma->obj_link);
828 rb_erase(&vma->obj_node, &vma->obj->vma.tree);
829 spin_unlock(&obj->vma.lock);
832 i915_active_fini(&vma->active);
837 void i915_vma_destroy(struct i915_vma *vma)
839 lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
841 GEM_BUG_ON(i915_vma_is_pinned(vma));
843 __i915_vma_remove_closed(vma);
845 WARN_ON(i915_vma_unbind(vma));
846 GEM_BUG_ON(i915_vma_is_active(vma));
848 __i915_vma_destroy(vma);
851 void i915_vma_parked(struct drm_i915_private *i915)
853 struct i915_vma *vma, *next;
855 spin_lock_irq(&i915->gt.closed_lock);
856 list_for_each_entry_safe(vma, next, &i915->gt.closed_vma, closed_link) {
857 list_del_init(&vma->closed_link);
858 spin_unlock_irq(&i915->gt.closed_lock);
860 i915_vma_destroy(vma);
862 spin_lock_irq(&i915->gt.closed_lock);
864 spin_unlock_irq(&i915->gt.closed_lock);
867 static void __i915_vma_iounmap(struct i915_vma *vma)
869 GEM_BUG_ON(i915_vma_is_pinned(vma));
871 if (vma->iomap == NULL)
874 io_mapping_unmap(vma->iomap);
878 void i915_vma_revoke_mmap(struct i915_vma *vma)
880 struct drm_vma_offset_node *node = &vma->obj->base.vma_node;
883 lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
885 if (!i915_vma_has_userfault(vma))
888 GEM_BUG_ON(!i915_vma_is_map_and_fenceable(vma));
889 GEM_BUG_ON(!vma->obj->userfault_count);
891 vma_offset = vma->ggtt_view.partial.offset << PAGE_SHIFT;
892 unmap_mapping_range(vma->vm->i915->drm.anon_inode->i_mapping,
893 drm_vma_node_offset_addr(node) + vma_offset,
897 i915_vma_unset_userfault(vma);
898 if (!--vma->obj->userfault_count)
899 list_del(&vma->obj->userfault_link);
902 static void export_fence(struct i915_vma *vma,
903 struct i915_request *rq,
906 struct reservation_object *resv = vma->resv;
909 * Ignore errors from failing to allocate the new fence, we can't
910 * handle an error right now. Worst case should be missed
911 * synchronisation leading to rendering corruption.
913 if (flags & EXEC_OBJECT_WRITE)
914 reservation_object_add_excl_fence(resv, &rq->fence);
915 else if (reservation_object_reserve_shared(resv, 1) == 0)
916 reservation_object_add_shared_fence(resv, &rq->fence);
919 int i915_vma_move_to_active(struct i915_vma *vma,
920 struct i915_request *rq,
923 struct drm_i915_gem_object *obj = vma->obj;
925 assert_vma_held(vma);
926 assert_object_held(obj);
927 GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
930 * Add a reference if we're newly entering the active list.
931 * The order in which we add operations to the retirement queue is
932 * vital here: mark_active adds to the start of the callback list,
933 * such that subsequent callbacks are called first. Therefore we
934 * add the active reference first and queue for it to be dropped
937 if (!vma->active.count && !obj->active_count++)
938 i915_gem_object_get(obj); /* once more for the active ref */
940 if (unlikely(i915_active_ref(&vma->active, rq->fence.context, rq))) {
941 if (!vma->active.count && !--obj->active_count)
942 i915_gem_object_put(obj);
946 GEM_BUG_ON(!i915_vma_is_active(vma));
947 GEM_BUG_ON(!obj->active_count);
949 obj->write_domain = 0;
950 if (flags & EXEC_OBJECT_WRITE) {
951 obj->write_domain = I915_GEM_DOMAIN_RENDER;
953 if (intel_fb_obj_invalidate(obj, ORIGIN_CS))
954 __i915_active_request_set(&obj->frontbuffer_write, rq);
956 obj->read_domains = 0;
958 obj->read_domains |= I915_GEM_GPU_DOMAINS;
960 if (flags & EXEC_OBJECT_NEEDS_FENCE)
961 __i915_active_request_set(&vma->last_fence, rq);
963 export_fence(vma, rq, flags);
967 int i915_vma_unbind(struct i915_vma *vma)
971 lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
974 * First wait upon any activity as retiring the request may
975 * have side-effects such as unpinning or even unbinding this vma.
978 if (i915_vma_is_active(vma)) {
980 * When a closed VMA is retired, it is unbound - eek.
981 * In order to prevent it from being recursively closed,
982 * take a pin on the vma so that the second unbind is
985 * Even more scary is that the retire callback may free
986 * the object (last active vma). To prevent the explosion
987 * we defer the actual object free to a worker that can
988 * only proceed once it acquires the struct_mutex (which
989 * we currently hold, therefore it cannot free this object
990 * before we are finished).
994 ret = i915_active_wait(&vma->active);
998 ret = i915_active_request_retire(&vma->last_fence,
999 &vma->vm->i915->drm.struct_mutex);
1001 __i915_vma_unpin(vma);
1005 GEM_BUG_ON(i915_vma_is_active(vma));
1007 if (i915_vma_is_pinned(vma)) {
1008 vma_print_allocator(vma, "is pinned");
1012 if (!drm_mm_node_allocated(&vma->node))
1015 if (i915_vma_is_map_and_fenceable(vma)) {
1017 * Check that we have flushed all writes through the GGTT
1018 * before the unbind, other due to non-strict nature of those
1019 * indirect writes they may end up referencing the GGTT PTE
1022 i915_vma_flush_writes(vma);
1023 GEM_BUG_ON(i915_vma_has_ggtt_write(vma));
1025 /* release the fence reg _after_ flushing */
1026 ret = i915_vma_put_fence(vma);
1030 /* Force a pagefault for domain tracking on next user access */
1031 i915_vma_revoke_mmap(vma);
1033 __i915_vma_iounmap(vma);
1034 vma->flags &= ~I915_VMA_CAN_FENCE;
1036 GEM_BUG_ON(vma->fence);
1037 GEM_BUG_ON(i915_vma_has_userfault(vma));
1039 if (likely(!vma->vm->closed)) {
1040 trace_i915_vma_unbind(vma);
1041 vma->ops->unbind_vma(vma);
1043 vma->flags &= ~(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
1045 i915_vma_remove(vma);
1050 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
1051 #include "selftests/i915_vma.c"
1054 static void i915_global_vma_shrink(void)
1056 kmem_cache_shrink(global.slab_vmas);
1059 static void i915_global_vma_exit(void)
1061 kmem_cache_destroy(global.slab_vmas);
1064 static struct i915_global_vma global = { {
1065 .shrink = i915_global_vma_shrink,
1066 .exit = i915_global_vma_exit,
1069 int __init i915_global_vma_init(void)
1071 global.slab_vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
1072 if (!global.slab_vmas)
1075 i915_global_register(&global.base);