| /* |
| * Copyright © 2016 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| * |
| */ |
| |
| #include <linux/sched/mm.h> |
| #include <linux/dma-fence-array.h> |
| #include <drm/drm_gem.h> |
| |
| #include "display/intel_frontbuffer.h" |
| #include "gem/i915_gem_lmem.h" |
| #include "gem/i915_gem_tiling.h" |
| #include "gt/intel_engine.h" |
| #include "gt/intel_engine_heartbeat.h" |
| #include "gt/intel_gt.h" |
| #include "gt/intel_gt_requests.h" |
| |
| #include "i915_drv.h" |
| #include "i915_gem_evict.h" |
| #include "i915_sw_fence_work.h" |
| #include "i915_trace.h" |
| #include "i915_vma.h" |
| #include "i915_vma_resource.h" |
| |
| static inline void assert_vma_held_evict(const struct i915_vma *vma) |
| { |
| /* |
| * We may be forced to unbind when the vm is dead, to clean it up. |
| * This is the only exception to the requirement of the object lock |
| * being held. |
| */ |
| if (kref_read(&vma->vm->ref)) |
| assert_object_held_shared(vma->obj); |
| } |
| |
| static struct kmem_cache *slab_vmas; |
| |
| static struct i915_vma *i915_vma_alloc(void) |
| { |
| return kmem_cache_zalloc(slab_vmas, GFP_KERNEL); |
| } |
| |
| static void i915_vma_free(struct i915_vma *vma) |
| { |
| return kmem_cache_free(slab_vmas, vma); |
| } |
| |
| #if IS_ENABLED(CONFIG_DRM_I915_ERRLOG_GEM) && IS_ENABLED(CONFIG_DRM_DEBUG_MM) |
| |
| #include <linux/stackdepot.h> |
| |
| static void vma_print_allocator(struct i915_vma *vma, const char *reason) |
| { |
| char buf[512]; |
| |
| if (!vma->node.stack) { |
| DRM_DEBUG_DRIVER("vma.node [%08llx + %08llx] %s: unknown owner\n", |
| vma->node.start, vma->node.size, reason); |
| return; |
| } |
| |
| stack_depot_snprint(vma->node.stack, buf, sizeof(buf), 0); |
| DRM_DEBUG_DRIVER("vma.node [%08llx + %08llx] %s: inserted at %s\n", |
| vma->node.start, vma->node.size, reason, buf); |
| } |
| |
| #else |
| |
| static void vma_print_allocator(struct i915_vma *vma, const char *reason) |
| { |
| } |
| |
| #endif |
| |
| static inline struct i915_vma *active_to_vma(struct i915_active *ref) |
| { |
| return container_of(ref, typeof(struct i915_vma), active); |
| } |
| |
| static int __i915_vma_active(struct i915_active *ref) |
| { |
| return i915_vma_tryget(active_to_vma(ref)) ? 0 : -ENOENT; |
| } |
| |
| static void __i915_vma_retire(struct i915_active *ref) |
| { |
| i915_vma_put(active_to_vma(ref)); |
| } |
| |
| static struct i915_vma * |
| vma_create(struct drm_i915_gem_object *obj, |
| struct i915_address_space *vm, |
| const struct i915_ggtt_view *view) |
| { |
| struct i915_vma *pos = ERR_PTR(-E2BIG); |
| struct i915_vma *vma; |
| struct rb_node *rb, **p; |
| int err; |
| |
| /* The aliasing_ppgtt should never be used directly! */ |
| GEM_BUG_ON(vm == &vm->gt->ggtt->alias->vm); |
| |
| vma = i915_vma_alloc(); |
| if (vma == NULL) |
| return ERR_PTR(-ENOMEM); |
| |
| vma->ops = &vm->vma_ops; |
| vma->obj = obj; |
| vma->size = obj->base.size; |
| vma->display_alignment = I915_GTT_MIN_ALIGNMENT; |
| |
| i915_active_init(&vma->active, __i915_vma_active, __i915_vma_retire, 0); |
| |
| /* Declare ourselves safe for use inside shrinkers */ |
| if (IS_ENABLED(CONFIG_LOCKDEP)) { |
| fs_reclaim_acquire(GFP_KERNEL); |
| might_lock(&vma->active.mutex); |
| fs_reclaim_release(GFP_KERNEL); |
| } |
| |
| INIT_LIST_HEAD(&vma->closed_link); |
| INIT_LIST_HEAD(&vma->obj_link); |
| RB_CLEAR_NODE(&vma->obj_node); |
| |
| if (view && view->type != I915_GGTT_VIEW_NORMAL) { |
| vma->ggtt_view = *view; |
| if (view->type == I915_GGTT_VIEW_PARTIAL) { |
| GEM_BUG_ON(range_overflows_t(u64, |
| view->partial.offset, |
| view->partial.size, |
| obj->base.size >> PAGE_SHIFT)); |
| vma->size = view->partial.size; |
| vma->size <<= PAGE_SHIFT; |
| GEM_BUG_ON(vma->size > obj->base.size); |
| } else if (view->type == I915_GGTT_VIEW_ROTATED) { |
| vma->size = intel_rotation_info_size(&view->rotated); |
| vma->size <<= PAGE_SHIFT; |
| } else if (view->type == I915_GGTT_VIEW_REMAPPED) { |
| vma->size = intel_remapped_info_size(&view->remapped); |
| vma->size <<= PAGE_SHIFT; |
| } |
| } |
| |
| if (unlikely(vma->size > vm->total)) |
| goto err_vma; |
| |
| GEM_BUG_ON(!IS_ALIGNED(vma->size, I915_GTT_PAGE_SIZE)); |
| |
| err = mutex_lock_interruptible(&vm->mutex); |
| if (err) { |
| pos = ERR_PTR(err); |
| goto err_vma; |
| } |
| |
| vma->vm = vm; |
| list_add_tail(&vma->vm_link, &vm->unbound_list); |
| |
| spin_lock(&obj->vma.lock); |
| if (i915_is_ggtt(vm)) { |
| if (unlikely(overflows_type(vma->size, u32))) |
| goto err_unlock; |
| |
| vma->fence_size = i915_gem_fence_size(vm->i915, vma->size, |
| i915_gem_object_get_tiling(obj), |
| i915_gem_object_get_stride(obj)); |
| if (unlikely(vma->fence_size < vma->size || /* overflow */ |
| vma->fence_size > vm->total)) |
| goto err_unlock; |
| |
| GEM_BUG_ON(!IS_ALIGNED(vma->fence_size, I915_GTT_MIN_ALIGNMENT)); |
| |
| vma->fence_alignment = i915_gem_fence_alignment(vm->i915, vma->size, |
| i915_gem_object_get_tiling(obj), |
| i915_gem_object_get_stride(obj)); |
| GEM_BUG_ON(!is_power_of_2(vma->fence_alignment)); |
| |
| __set_bit(I915_VMA_GGTT_BIT, __i915_vma_flags(vma)); |
| } |
| |
| rb = NULL; |
| p = &obj->vma.tree.rb_node; |
| while (*p) { |
| long cmp; |
| |
| rb = *p; |
| pos = rb_entry(rb, struct i915_vma, obj_node); |
| |
| /* |
| * If the view already exists in the tree, another thread |
| * already created a matching vma, so return the older instance |
| * and dispose of ours. |
| */ |
| cmp = i915_vma_compare(pos, vm, view); |
| if (cmp < 0) |
| p = &rb->rb_right; |
| else if (cmp > 0) |
| p = &rb->rb_left; |
| else |
| goto err_unlock; |
| } |
| rb_link_node(&vma->obj_node, rb, p); |
| rb_insert_color(&vma->obj_node, &obj->vma.tree); |
| |
| if (i915_vma_is_ggtt(vma)) |
| /* |
| * We put the GGTT vma at the start of the vma-list, followed |
| * by the ppGGTT vma. This allows us to break early when |
| * iterating over only the GGTT vma for an object, see |
| * for_each_ggtt_vma() |
| */ |
| list_add(&vma->obj_link, &obj->vma.list); |
| else |
| list_add_tail(&vma->obj_link, &obj->vma.list); |
| |
| spin_unlock(&obj->vma.lock); |
| mutex_unlock(&vm->mutex); |
| |
| return vma; |
| |
| err_unlock: |
| spin_unlock(&obj->vma.lock); |
| list_del_init(&vma->vm_link); |
| mutex_unlock(&vm->mutex); |
| err_vma: |
| i915_vma_free(vma); |
| return pos; |
| } |
| |
| static struct i915_vma * |
| i915_vma_lookup(struct drm_i915_gem_object *obj, |
| struct i915_address_space *vm, |
| const struct i915_ggtt_view *view) |
| { |
| struct rb_node *rb; |
| |
| rb = obj->vma.tree.rb_node; |
| while (rb) { |
| struct i915_vma *vma = rb_entry(rb, struct i915_vma, obj_node); |
| long cmp; |
| |
| cmp = i915_vma_compare(vma, vm, view); |
| if (cmp == 0) |
| return vma; |
| |
| if (cmp < 0) |
| rb = rb->rb_right; |
| else |
| rb = rb->rb_left; |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * i915_vma_instance - return the singleton instance of the VMA |
| * @obj: parent &struct drm_i915_gem_object to be mapped |
| * @vm: address space in which the mapping is located |
| * @view: additional mapping requirements |
| * |
| * i915_vma_instance() looks up an existing VMA of the @obj in the @vm with |
| * the same @view characteristics. If a match is not found, one is created. |
| * Once created, the VMA is kept until either the object is freed, or the |
| * address space is closed. |
| * |
| * Returns the vma, or an error pointer. |
| */ |
| struct i915_vma * |
| i915_vma_instance(struct drm_i915_gem_object *obj, |
| struct i915_address_space *vm, |
| const struct i915_ggtt_view *view) |
| { |
| struct i915_vma *vma; |
| |
| GEM_BUG_ON(view && !i915_is_ggtt_or_dpt(vm)); |
| GEM_BUG_ON(!kref_read(&vm->ref)); |
| |
| spin_lock(&obj->vma.lock); |
| vma = i915_vma_lookup(obj, vm, view); |
| spin_unlock(&obj->vma.lock); |
| |
| /* vma_create() will resolve the race if another creates the vma */ |
| if (unlikely(!vma)) |
| vma = vma_create(obj, vm, view); |
| |
| GEM_BUG_ON(!IS_ERR(vma) && i915_vma_compare(vma, vm, view)); |
| return vma; |
| } |
| |
| struct i915_vma_work { |
| struct dma_fence_work base; |
| struct i915_address_space *vm; |
| struct i915_vm_pt_stash stash; |
| struct i915_vma_resource *vma_res; |
| struct drm_i915_gem_object *pinned; |
| struct i915_sw_dma_fence_cb cb; |
| enum i915_cache_level cache_level; |
| unsigned int flags; |
| }; |
| |
| static void __vma_bind(struct dma_fence_work *work) |
| { |
| struct i915_vma_work *vw = container_of(work, typeof(*vw), base); |
| struct i915_vma_resource *vma_res = vw->vma_res; |
| |
| vma_res->ops->bind_vma(vma_res->vm, &vw->stash, |
| vma_res, vw->cache_level, vw->flags); |
| |
| } |
| |
| static void __vma_release(struct dma_fence_work *work) |
| { |
| struct i915_vma_work *vw = container_of(work, typeof(*vw), base); |
| |
| if (vw->pinned) |
| i915_gem_object_put(vw->pinned); |
| |
| i915_vm_free_pt_stash(vw->vm, &vw->stash); |
| if (vw->vma_res) |
| i915_vma_resource_put(vw->vma_res); |
| } |
| |
| static const struct dma_fence_work_ops bind_ops = { |
| .name = "bind", |
| .work = __vma_bind, |
| .release = __vma_release, |
| }; |
| |
| struct i915_vma_work *i915_vma_work(void) |
| { |
| struct i915_vma_work *vw; |
| |
| vw = kzalloc(sizeof(*vw), GFP_KERNEL); |
| if (!vw) |
| return NULL; |
| |
| dma_fence_work_init(&vw->base, &bind_ops); |
| vw->base.dma.error = -EAGAIN; /* disable the worker by default */ |
| |
| return vw; |
| } |
| |
| int i915_vma_wait_for_bind(struct i915_vma *vma) |
| { |
| int err = 0; |
| |
| if (rcu_access_pointer(vma->active.excl.fence)) { |
| struct dma_fence *fence; |
| |
| rcu_read_lock(); |
| fence = dma_fence_get_rcu_safe(&vma->active.excl.fence); |
| rcu_read_unlock(); |
| if (fence) { |
| err = dma_fence_wait(fence, true); |
| dma_fence_put(fence); |
| } |
| } |
| |
| return err; |
| } |
| |
| #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) |
| static int i915_vma_verify_bind_complete(struct i915_vma *vma) |
| { |
| struct dma_fence *fence = i915_active_fence_get(&vma->active.excl); |
| int err; |
| |
| if (!fence) |
| return 0; |
| |
| if (dma_fence_is_signaled(fence)) |
| err = fence->error; |
| else |
| err = -EBUSY; |
| |
| dma_fence_put(fence); |
| |
| return err; |
| } |
| #else |
| #define i915_vma_verify_bind_complete(_vma) 0 |
| #endif |
| |
| I915_SELFTEST_EXPORT void |
| i915_vma_resource_init_from_vma(struct i915_vma_resource *vma_res, |
| struct i915_vma *vma) |
| { |
| struct drm_i915_gem_object *obj = vma->obj; |
| |
| i915_vma_resource_init(vma_res, vma->vm, vma->pages, &vma->page_sizes, |
| obj->mm.rsgt, i915_gem_object_is_readonly(obj), |
| i915_gem_object_is_lmem(obj), obj->mm.region, |
| vma->ops, vma->private, vma->node.start, |
| vma->node.size, vma->size); |
| } |
| |
| /** |
| * i915_vma_bind - Sets up PTEs for an VMA in it's corresponding address space. |
| * @vma: VMA to map |
| * @cache_level: mapping cache level |
| * @flags: flags like global or local mapping |
| * @work: preallocated worker for allocating and binding the PTE |
| * @vma_res: pointer to a preallocated vma resource. The resource is either |
| * consumed or freed. |
| * |
| * DMA addresses are taken from the scatter-gather table of this object (or of |
| * this VMA in case of non-default GGTT views) and PTE entries set up. |
| * Note that DMA addresses are also the only part of the SG table we care about. |
| */ |
| int i915_vma_bind(struct i915_vma *vma, |
| enum i915_cache_level cache_level, |
| u32 flags, |
| struct i915_vma_work *work, |
| struct i915_vma_resource *vma_res) |
| { |
| u32 bind_flags; |
| u32 vma_flags; |
| int ret; |
| |
| lockdep_assert_held(&vma->vm->mutex); |
| GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); |
| GEM_BUG_ON(vma->size > vma->node.size); |
| |
| if (GEM_DEBUG_WARN_ON(range_overflows(vma->node.start, |
| vma->node.size, |
| vma->vm->total))) { |
| i915_vma_resource_free(vma_res); |
| return -ENODEV; |
| } |
| |
| if (GEM_DEBUG_WARN_ON(!flags)) { |
| i915_vma_resource_free(vma_res); |
| return -EINVAL; |
| } |
| |
| bind_flags = flags; |
| bind_flags &= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND; |
| |
| vma_flags = atomic_read(&vma->flags); |
| vma_flags &= I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND; |
| |
| bind_flags &= ~vma_flags; |
| if (bind_flags == 0) { |
| i915_vma_resource_free(vma_res); |
| return 0; |
| } |
| |
| GEM_BUG_ON(!atomic_read(&vma->pages_count)); |
| |
| /* Wait for or await async unbinds touching our range */ |
| if (work && bind_flags & vma->vm->bind_async_flags) |
| ret = i915_vma_resource_bind_dep_await(vma->vm, |
| &work->base.chain, |
| vma->node.start, |
| vma->node.size, |
| true, |
| GFP_NOWAIT | |
| __GFP_RETRY_MAYFAIL | |
| __GFP_NOWARN); |
| else |
| ret = i915_vma_resource_bind_dep_sync(vma->vm, vma->node.start, |
| vma->node.size, true); |
| if (ret) { |
| i915_vma_resource_free(vma_res); |
| return ret; |
| } |
| |
| if (vma->resource || !vma_res) { |
| /* Rebinding with an additional I915_VMA_*_BIND */ |
| GEM_WARN_ON(!vma_flags); |
| i915_vma_resource_free(vma_res); |
| } else { |
| i915_vma_resource_init_from_vma(vma_res, vma); |
| vma->resource = vma_res; |
| } |
| trace_i915_vma_bind(vma, bind_flags); |
| if (work && bind_flags & vma->vm->bind_async_flags) { |
| struct dma_fence *prev; |
| |
| work->vma_res = i915_vma_resource_get(vma->resource); |
| work->cache_level = cache_level; |
| work->flags = bind_flags; |
| |
| /* |
| * Note we only want to chain up to the migration fence on |
| * the pages (not the object itself). As we don't track that, |
| * yet, we have to use the exclusive fence instead. |
| * |
| * Also note that we do not want to track the async vma as |
| * part of the obj->resv->excl_fence as it only affects |
| * execution and not content or object's backing store lifetime. |
| */ |
| prev = i915_active_set_exclusive(&vma->active, &work->base.dma); |
| if (prev) { |
| __i915_sw_fence_await_dma_fence(&work->base.chain, |
| prev, |
| &work->cb); |
| dma_fence_put(prev); |
| } |
| |
| work->base.dma.error = 0; /* enable the queue_work() */ |
| |
| /* |
| * If we don't have the refcounted pages list, keep a reference |
| * on the object to avoid waiting for the async bind to |
| * complete in the object destruction path. |
| */ |
| if (!work->vma_res->bi.pages_rsgt) |
| work->pinned = i915_gem_object_get(vma->obj); |
| } else { |
| ret = i915_gem_object_wait_moving_fence(vma->obj, true); |
| if (ret) { |
| i915_vma_resource_free(vma->resource); |
| vma->resource = NULL; |
| |
| return ret; |
| } |
| vma->ops->bind_vma(vma->vm, NULL, vma->resource, cache_level, |
| bind_flags); |
| } |
| |
| set_bit(I915_BO_WAS_BOUND_BIT, &vma->obj->flags); |
| |
| atomic_or(bind_flags, &vma->flags); |
| return 0; |
| } |
| |
| void __iomem *i915_vma_pin_iomap(struct i915_vma *vma) |
| { |
| void __iomem *ptr; |
| int err; |
| |
| if (WARN_ON_ONCE(vma->obj->flags & I915_BO_ALLOC_GPU_ONLY)) |
| return IOMEM_ERR_PTR(-EINVAL); |
| |
| if (!i915_gem_object_is_lmem(vma->obj)) { |
| if (GEM_WARN_ON(!i915_vma_is_map_and_fenceable(vma))) { |
| err = -ENODEV; |
| goto err; |
| } |
| } |
| |
| GEM_BUG_ON(!i915_vma_is_ggtt(vma)); |
| GEM_BUG_ON(!i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND)); |
| GEM_BUG_ON(i915_vma_verify_bind_complete(vma)); |
| |
| ptr = READ_ONCE(vma->iomap); |
| if (ptr == NULL) { |
| /* |
| * TODO: consider just using i915_gem_object_pin_map() for lmem |
| * instead, which already supports mapping non-contiguous chunks |
| * of pages, that way we can also drop the |
| * I915_BO_ALLOC_CONTIGUOUS when allocating the object. |
| */ |
| if (i915_gem_object_is_lmem(vma->obj)) |
| ptr = i915_gem_object_lmem_io_map(vma->obj, 0, |
| vma->obj->base.size); |
| else |
| ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->iomap, |
| vma->node.start, |
| vma->node.size); |
| if (ptr == NULL) { |
| err = -ENOMEM; |
| goto err; |
| } |
| |
| if (unlikely(cmpxchg(&vma->iomap, NULL, ptr))) { |
| io_mapping_unmap(ptr); |
| ptr = vma->iomap; |
| } |
| } |
| |
| __i915_vma_pin(vma); |
| |
| err = i915_vma_pin_fence(vma); |
| if (err) |
| goto err_unpin; |
| |
| i915_vma_set_ggtt_write(vma); |
| |
| /* NB Access through the GTT requires the device to be awake. */ |
| return ptr; |
| |
| err_unpin: |
| __i915_vma_unpin(vma); |
| err: |
| return IOMEM_ERR_PTR(err); |
| } |
| |
| void i915_vma_flush_writes(struct i915_vma *vma) |
| { |
| if (i915_vma_unset_ggtt_write(vma)) |
| intel_gt_flush_ggtt_writes(vma->vm->gt); |
| } |
| |
| void i915_vma_unpin_iomap(struct i915_vma *vma) |
| { |
| GEM_BUG_ON(vma->iomap == NULL); |
| |
| i915_vma_flush_writes(vma); |
| |
| i915_vma_unpin_fence(vma); |
| i915_vma_unpin(vma); |
| } |
| |
| void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags) |
| { |
| struct i915_vma *vma; |
| struct drm_i915_gem_object *obj; |
| |
| vma = fetch_and_zero(p_vma); |
| if (!vma) |
| return; |
| |
| obj = vma->obj; |
| GEM_BUG_ON(!obj); |
| |
| i915_vma_unpin(vma); |
| |
| if (flags & I915_VMA_RELEASE_MAP) |
| i915_gem_object_unpin_map(obj); |
| |
| i915_gem_object_put(obj); |
| } |
| |
| bool i915_vma_misplaced(const struct i915_vma *vma, |
| u64 size, u64 alignment, u64 flags) |
| { |
| if (!drm_mm_node_allocated(&vma->node)) |
| return false; |
| |
| if (test_bit(I915_VMA_ERROR_BIT, __i915_vma_flags(vma))) |
| return true; |
| |
| if (vma->node.size < size) |
| return true; |
| |
| GEM_BUG_ON(alignment && !is_power_of_2(alignment)); |
| if (alignment && !IS_ALIGNED(vma->node.start, alignment)) |
| return true; |
| |
| if (flags & PIN_MAPPABLE && !i915_vma_is_map_and_fenceable(vma)) |
| return true; |
| |
| if (flags & PIN_OFFSET_BIAS && |
| vma->node.start < (flags & PIN_OFFSET_MASK)) |
| return true; |
| |
| if (flags & PIN_OFFSET_FIXED && |
| vma->node.start != (flags & PIN_OFFSET_MASK)) |
| return true; |
| |
| return false; |
| } |
| |
| void __i915_vma_set_map_and_fenceable(struct i915_vma *vma) |
| { |
| bool mappable, fenceable; |
| |
| GEM_BUG_ON(!i915_vma_is_ggtt(vma)); |
| GEM_BUG_ON(!vma->fence_size); |
| |
| fenceable = (vma->node.size >= vma->fence_size && |
| IS_ALIGNED(vma->node.start, vma->fence_alignment)); |
| |
| mappable = vma->node.start + vma->fence_size <= i915_vm_to_ggtt(vma->vm)->mappable_end; |
| |
| if (mappable && fenceable) |
| set_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma)); |
| else |
| clear_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma)); |
| } |
| |
| bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long color) |
| { |
| struct drm_mm_node *node = &vma->node; |
| struct drm_mm_node *other; |
| |
| /* |
| * On some machines we have to be careful when putting differing types |
| * of snoopable memory together to avoid the prefetcher crossing memory |
| * domains and dying. During vm initialisation, we decide whether or not |
| * these constraints apply and set the drm_mm.color_adjust |
| * appropriately. |
| */ |
| if (!i915_vm_has_cache_coloring(vma->vm)) |
| return true; |
| |
| /* Only valid to be called on an already inserted vma */ |
| GEM_BUG_ON(!drm_mm_node_allocated(node)); |
| GEM_BUG_ON(list_empty(&node->node_list)); |
| |
| other = list_prev_entry(node, node_list); |
| if (i915_node_color_differs(other, color) && |
| !drm_mm_hole_follows(other)) |
| return false; |
| |
| other = list_next_entry(node, node_list); |
| if (i915_node_color_differs(other, color) && |
| !drm_mm_hole_follows(node)) |
| return false; |
| |
| return true; |
| } |
| |
| /** |
| * i915_vma_insert - finds a slot for the vma in its address space |
| * @vma: the vma |
| * @size: requested size in bytes (can be larger than the VMA) |
| * @alignment: required alignment |
| * @flags: mask of PIN_* flags to use |
| * |
| * First we try to allocate some free space that meets the requirements for |
| * the VMA. Failiing that, if the flags permit, it will evict an old VMA, |
| * preferrably the oldest idle entry to make room for the new VMA. |
| * |
| * Returns: |
| * 0 on success, negative error code otherwise. |
| */ |
| static int |
| i915_vma_insert(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, |
| u64 size, u64 alignment, u64 flags) |
| { |
| unsigned long color; |
| u64 start, end; |
| int ret; |
| |
| GEM_BUG_ON(i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)); |
| GEM_BUG_ON(drm_mm_node_allocated(&vma->node)); |
| |
| size = max(size, vma->size); |
| alignment = max(alignment, vma->display_alignment); |
| if (flags & PIN_MAPPABLE) { |
| size = max_t(typeof(size), size, vma->fence_size); |
| alignment = max_t(typeof(alignment), |
| alignment, vma->fence_alignment); |
| } |
| |
| GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)); |
| GEM_BUG_ON(!IS_ALIGNED(alignment, I915_GTT_MIN_ALIGNMENT)); |
| GEM_BUG_ON(!is_power_of_2(alignment)); |
| |
| start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0; |
| GEM_BUG_ON(!IS_ALIGNED(start, I915_GTT_PAGE_SIZE)); |
| |
| end = vma->vm->total; |
| if (flags & PIN_MAPPABLE) |
| end = min_t(u64, end, i915_vm_to_ggtt(vma->vm)->mappable_end); |
| if (flags & PIN_ZONE_4G) |
| end = min_t(u64, end, (1ULL << 32) - I915_GTT_PAGE_SIZE); |
| GEM_BUG_ON(!IS_ALIGNED(end, I915_GTT_PAGE_SIZE)); |
| |
| alignment = max(alignment, i915_vm_obj_min_alignment(vma->vm, vma->obj)); |
| /* |
| * for compact-pt we round up the reservation to prevent |
| * any smaller pages being used within the same PDE |
| */ |
| if (NEEDS_COMPACT_PT(vma->vm->i915)) |
| size = round_up(size, alignment); |
| |
| /* If binding the object/GGTT view requires more space than the entire |
| * aperture has, reject it early before evicting everything in a vain |
| * attempt to find space. |
| */ |
| if (size > end) { |
| DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu > %s aperture=%llu\n", |
| size, flags & PIN_MAPPABLE ? "mappable" : "total", |
| end); |
| return -ENOSPC; |
| } |
| |
| color = 0; |
| |
| if (i915_vm_has_cache_coloring(vma->vm)) |
| color = vma->obj->cache_level; |
| |
| if (flags & PIN_OFFSET_FIXED) { |
| u64 offset = flags & PIN_OFFSET_MASK; |
| if (!IS_ALIGNED(offset, alignment) || |
| range_overflows(offset, size, end)) |
| return -EINVAL; |
| |
| ret = i915_gem_gtt_reserve(vma->vm, ww, &vma->node, |
| size, offset, color, |
| flags); |
| if (ret) |
| return ret; |
| } else { |
| /* |
| * We only support huge gtt pages through the 48b PPGTT, |
| * however we also don't want to force any alignment for |
| * objects which need to be tightly packed into the low 32bits. |
| * |
| * Note that we assume that GGTT are limited to 4GiB for the |
| * forseeable future. See also i915_ggtt_offset(). |
| */ |
| if (upper_32_bits(end - 1) && |
| vma->page_sizes.sg > I915_GTT_PAGE_SIZE) { |
| /* |
| * We can't mix 64K and 4K PTEs in the same page-table |
| * (2M block), and so to avoid the ugliness and |
| * complexity of coloring we opt for just aligning 64K |
| * objects to 2M. |
| */ |
| u64 page_alignment = |
| rounddown_pow_of_two(vma->page_sizes.sg | |
| I915_GTT_PAGE_SIZE_2M); |
| |
| /* |
| * Check we don't expand for the limited Global GTT |
| * (mappable aperture is even more precious!). This |
| * also checks that we exclude the aliasing-ppgtt. |
| */ |
| GEM_BUG_ON(i915_vma_is_ggtt(vma)); |
| |
| alignment = max(alignment, page_alignment); |
| |
| if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K) |
| size = round_up(size, I915_GTT_PAGE_SIZE_2M); |
| } |
| |
| ret = i915_gem_gtt_insert(vma->vm, ww, &vma->node, |
| size, alignment, color, |
| start, end, flags); |
| if (ret) |
| return ret; |
| |
| GEM_BUG_ON(vma->node.start < start); |
| GEM_BUG_ON(vma->node.start + vma->node.size > end); |
| } |
| GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); |
| GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, color)); |
| |
| list_move_tail(&vma->vm_link, &vma->vm->bound_list); |
| |
| return 0; |
| } |
| |
| static void |
| i915_vma_detach(struct i915_vma *vma) |
| { |
| GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); |
| GEM_BUG_ON(i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND)); |
| |
| /* |
| * And finally now the object is completely decoupled from this |
| * vma, we can drop its hold on the backing storage and allow |
| * it to be reaped by the shrinker. |
| */ |
| list_move_tail(&vma->vm_link, &vma->vm->unbound_list); |
| } |
| |
| static bool try_qad_pin(struct i915_vma *vma, unsigned int flags) |
| { |
| unsigned int bound; |
| |
| bound = atomic_read(&vma->flags); |
| |
| if (flags & PIN_VALIDATE) { |
| flags &= I915_VMA_BIND_MASK; |
| |
| return (flags & bound) == flags; |
| } |
| |
| /* with the lock mandatory for unbind, we don't race here */ |
| flags &= I915_VMA_BIND_MASK; |
| do { |
| if (unlikely(flags & ~bound)) |
| return false; |
| |
| if (unlikely(bound & (I915_VMA_OVERFLOW | I915_VMA_ERROR))) |
| return false; |
| |
| GEM_BUG_ON(((bound + 1) & I915_VMA_PIN_MASK) == 0); |
| } while (!atomic_try_cmpxchg(&vma->flags, &bound, bound + 1)); |
| |
| return true; |
| } |
| |
| static struct scatterlist * |
| rotate_pages(struct drm_i915_gem_object *obj, unsigned int offset, |
| unsigned int width, unsigned int height, |
| unsigned int src_stride, unsigned int dst_stride, |
| struct sg_table *st, struct scatterlist *sg) |
| { |
| unsigned int column, row; |
| unsigned int src_idx; |
| |
| for (column = 0; column < width; column++) { |
| unsigned int left; |
| |
| src_idx = src_stride * (height - 1) + column + offset; |
| for (row = 0; row < height; row++) { |
| st->nents++; |
| /* |
| * We don't need the pages, but need to initialize |
| * the entries so the sg list can be happily traversed. |
| * The only thing we need are DMA addresses. |
| */ |
| sg_set_page(sg, NULL, I915_GTT_PAGE_SIZE, 0); |
| sg_dma_address(sg) = |
| i915_gem_object_get_dma_address(obj, src_idx); |
| sg_dma_len(sg) = I915_GTT_PAGE_SIZE; |
| sg = sg_next(sg); |
| src_idx -= src_stride; |
| } |
| |
| left = (dst_stride - height) * I915_GTT_PAGE_SIZE; |
| |
| if (!left) |
| continue; |
| |
| st->nents++; |
| |
| /* |
| * The DE ignores the PTEs for the padding tiles, the sg entry |
| * here is just a conenience to indicate how many padding PTEs |
| * to insert at this spot. |
| */ |
| sg_set_page(sg, NULL, left, 0); |
| sg_dma_address(sg) = 0; |
| sg_dma_len(sg) = left; |
| sg = sg_next(sg); |
| } |
| |
| return sg; |
| } |
| |
| static noinline struct sg_table * |
| intel_rotate_pages(struct intel_rotation_info *rot_info, |
| struct drm_i915_gem_object *obj) |
| { |
| unsigned int size = intel_rotation_info_size(rot_info); |
| struct drm_i915_private *i915 = to_i915(obj->base.dev); |
| struct sg_table *st; |
| struct scatterlist *sg; |
| int ret = -ENOMEM; |
| int i; |
| |
| /* Allocate target SG list. */ |
| st = kmalloc(sizeof(*st), GFP_KERNEL); |
| if (!st) |
| goto err_st_alloc; |
| |
| ret = sg_alloc_table(st, size, GFP_KERNEL); |
| if (ret) |
| goto err_sg_alloc; |
| |
| st->nents = 0; |
| sg = st->sgl; |
| |
| for (i = 0 ; i < ARRAY_SIZE(rot_info->plane); i++) |
| sg = rotate_pages(obj, rot_info->plane[i].offset, |
| rot_info->plane[i].width, rot_info->plane[i].height, |
| rot_info->plane[i].src_stride, |
| rot_info->plane[i].dst_stride, |
| st, sg); |
| |
| return st; |
| |
| err_sg_alloc: |
| kfree(st); |
| err_st_alloc: |
| |
| drm_dbg(&i915->drm, "Failed to create rotated mapping for object size %zu! (%ux%u tiles, %u pages)\n", |
| obj->base.size, rot_info->plane[0].width, |
| rot_info->plane[0].height, size); |
| |
| return ERR_PTR(ret); |
| } |
| |
| static struct scatterlist * |
| add_padding_pages(unsigned int count, |
| struct sg_table *st, struct scatterlist *sg) |
| { |
| st->nents++; |
| |
| /* |
| * The DE ignores the PTEs for the padding tiles, the sg entry |
| * here is just a convenience to indicate how many padding PTEs |
| * to insert at this spot. |
| */ |
| sg_set_page(sg, NULL, count * I915_GTT_PAGE_SIZE, 0); |
| sg_dma_address(sg) = 0; |
| sg_dma_len(sg) = count * I915_GTT_PAGE_SIZE; |
| sg = sg_next(sg); |
| |
| return sg; |
| } |
| |
| static struct scatterlist * |
| remap_tiled_color_plane_pages(struct drm_i915_gem_object *obj, |
| unsigned int offset, unsigned int alignment_pad, |
| unsigned int width, unsigned int height, |
| unsigned int src_stride, unsigned int dst_stride, |
| struct sg_table *st, struct scatterlist *sg, |
| unsigned int *gtt_offset) |
| { |
| unsigned int row; |
| |
| if (!width || !height) |
| return sg; |
| |
| if (alignment_pad) |
| sg = add_padding_pages(alignment_pad, st, sg); |
| |
| for (row = 0; row < height; row++) { |
| unsigned int left = width * I915_GTT_PAGE_SIZE; |
| |
| while (left) { |
| dma_addr_t addr; |
| unsigned int length; |
| |
| /* |
| * We don't need the pages, but need to initialize |
| * the entries so the sg list can be happily traversed. |
| * The only thing we need are DMA addresses. |
| */ |
| |
| addr = i915_gem_object_get_dma_address_len(obj, offset, &length); |
| |
| length = min(left, length); |
| |
| st->nents++; |
| |
| sg_set_page(sg, NULL, length, 0); |
| sg_dma_address(sg) = addr; |
| sg_dma_len(sg) = length; |
| sg = sg_next(sg); |
| |
| offset += length / I915_GTT_PAGE_SIZE; |
| left -= length; |
| } |
| |
| offset += src_stride - width; |
| |
| left = (dst_stride - width) * I915_GTT_PAGE_SIZE; |
| |
| if (!left) |
| continue; |
| |
| sg = add_padding_pages(left >> PAGE_SHIFT, st, sg); |
| } |
| |
| *gtt_offset += alignment_pad + dst_stride * height; |
| |
| return sg; |
| } |
| |
| static struct scatterlist * |
| remap_contiguous_pages(struct drm_i915_gem_object *obj, |
| unsigned int obj_offset, |
| unsigned int count, |
| struct sg_table *st, struct scatterlist *sg) |
| { |
| struct scatterlist *iter; |
| unsigned int offset; |
| |
| iter = i915_gem_object_get_sg_dma(obj, obj_offset, &offset); |
| GEM_BUG_ON(!iter); |
| |
| do { |
| unsigned int len; |
| |
| len = min(sg_dma_len(iter) - (offset << PAGE_SHIFT), |
| count << PAGE_SHIFT); |
| sg_set_page(sg, NULL, len, 0); |
| sg_dma_address(sg) = |
| sg_dma_address(iter) + (offset << PAGE_SHIFT); |
| sg_dma_len(sg) = len; |
| |
| st->nents++; |
| count -= len >> PAGE_SHIFT; |
| if (count == 0) |
| return sg; |
| |
| sg = __sg_next(sg); |
| iter = __sg_next(iter); |
| offset = 0; |
| } while (1); |
| } |
| |
| static struct scatterlist * |
| remap_linear_color_plane_pages(struct drm_i915_gem_object *obj, |
| unsigned int obj_offset, unsigned int alignment_pad, |
| unsigned int size, |
| struct sg_table *st, struct scatterlist *sg, |
| unsigned int *gtt_offset) |
| { |
| if (!size) |
| return sg; |
| |
| if (alignment_pad) |
| sg = add_padding_pages(alignment_pad, st, sg); |
| |
| sg = remap_contiguous_pages(obj, obj_offset, size, st, sg); |
| sg = sg_next(sg); |
| |
| *gtt_offset += alignment_pad + size; |
| |
| return sg; |
| } |
| |
| static struct scatterlist * |
| remap_color_plane_pages(const struct intel_remapped_info *rem_info, |
| struct drm_i915_gem_object *obj, |
| int color_plane, |
| struct sg_table *st, struct scatterlist *sg, |
| unsigned int *gtt_offset) |
| { |
| unsigned int alignment_pad = 0; |
| |
| if (rem_info->plane_alignment) |
| alignment_pad = ALIGN(*gtt_offset, rem_info->plane_alignment) - *gtt_offset; |
| |
| if (rem_info->plane[color_plane].linear) |
| sg = remap_linear_color_plane_pages(obj, |
| rem_info->plane[color_plane].offset, |
| alignment_pad, |
| rem_info->plane[color_plane].size, |
| st, sg, |
| gtt_offset); |
| |
| else |
| sg = remap_tiled_color_plane_pages(obj, |
| rem_info->plane[color_plane].offset, |
| alignment_pad, |
| rem_info->plane[color_plane].width, |
| rem_info->plane[color_plane].height, |
| rem_info->plane[color_plane].src_stride, |
| rem_info->plane[color_plane].dst_stride, |
| st, sg, |
| gtt_offset); |
| |
| return sg; |
| } |
| |
| static noinline struct sg_table * |
| intel_remap_pages(struct intel_remapped_info *rem_info, |
| struct drm_i915_gem_object *obj) |
| { |
| unsigned int size = intel_remapped_info_size(rem_info); |
| struct drm_i915_private *i915 = to_i915(obj->base.dev); |
| struct sg_table *st; |
| struct scatterlist *sg; |
| unsigned int gtt_offset = 0; |
| int ret = -ENOMEM; |
| int i; |
| |
| /* Allocate target SG list. */ |
| st = kmalloc(sizeof(*st), GFP_KERNEL); |
| if (!st) |
| goto err_st_alloc; |
| |
| ret = sg_alloc_table(st, size, GFP_KERNEL); |
| if (ret) |
| goto err_sg_alloc; |
| |
| st->nents = 0; |
| sg = st->sgl; |
| |
| for (i = 0 ; i < ARRAY_SIZE(rem_info->plane); i++) |
| sg = remap_color_plane_pages(rem_info, obj, i, st, sg, >t_offset); |
| |
| i915_sg_trim(st); |
| |
| return st; |
| |
| err_sg_alloc: |
| kfree(st); |
| err_st_alloc: |
| |
| drm_dbg(&i915->drm, "Failed to create remapped mapping for object size %zu! (%ux%u tiles, %u pages)\n", |
| obj->base.size, rem_info->plane[0].width, |
| rem_info->plane[0].height, size); |
| |
| return ERR_PTR(ret); |
| } |
| |
| static noinline struct sg_table * |
| intel_partial_pages(const struct i915_ggtt_view *view, |
| struct drm_i915_gem_object *obj) |
| { |
| struct sg_table *st; |
| struct scatterlist *sg; |
| unsigned int count = view->partial.size; |
| int ret = -ENOMEM; |
| |
| st = kmalloc(sizeof(*st), GFP_KERNEL); |
| if (!st) |
| goto err_st_alloc; |
| |
| ret = sg_alloc_table(st, count, GFP_KERNEL); |
| if (ret) |
| goto err_sg_alloc; |
| |
| st->nents = 0; |
| |
| sg = remap_contiguous_pages(obj, view->partial.offset, count, st, st->sgl); |
| |
| sg_mark_end(sg); |
| i915_sg_trim(st); /* Drop any unused tail entries. */ |
| |
| return st; |
| |
| err_sg_alloc: |
| kfree(st); |
| err_st_alloc: |
| return ERR_PTR(ret); |
| } |
| |
| static int |
| __i915_vma_get_pages(struct i915_vma *vma) |
| { |
| struct sg_table *pages; |
| |
| /* |
| * The vma->pages are only valid within the lifespan of the borrowed |
| * obj->mm.pages. When the obj->mm.pages sg_table is regenerated, so |
| * must be the vma->pages. A simple rule is that vma->pages must only |
| * be accessed when the obj->mm.pages are pinned. |
| */ |
| GEM_BUG_ON(!i915_gem_object_has_pinned_pages(vma->obj)); |
| |
| switch (vma->ggtt_view.type) { |
| default: |
| GEM_BUG_ON(vma->ggtt_view.type); |
| fallthrough; |
| case I915_GGTT_VIEW_NORMAL: |
| pages = vma->obj->mm.pages; |
| break; |
| |
| case I915_GGTT_VIEW_ROTATED: |
| pages = |
| intel_rotate_pages(&vma->ggtt_view.rotated, vma->obj); |
| break; |
| |
| case I915_GGTT_VIEW_REMAPPED: |
| pages = |
| intel_remap_pages(&vma->ggtt_view.remapped, vma->obj); |
| break; |
| |
| case I915_GGTT_VIEW_PARTIAL: |
| pages = intel_partial_pages(&vma->ggtt_view, vma->obj); |
| break; |
| } |
| |
| if (IS_ERR(pages)) { |
| drm_err(&vma->vm->i915->drm, |
| "Failed to get pages for VMA view type %u (%ld)!\n", |
| vma->ggtt_view.type, PTR_ERR(pages)); |
| return PTR_ERR(pages); |
| } |
| |
| vma->pages = pages; |
| |
| return 0; |
| } |
| |
| I915_SELFTEST_EXPORT int i915_vma_get_pages(struct i915_vma *vma) |
| { |
| int err; |
| |
| if (atomic_add_unless(&vma->pages_count, 1, 0)) |
| return 0; |
| |
| err = i915_gem_object_pin_pages(vma->obj); |
| if (err) |
| return err; |
| |
| err = __i915_vma_get_pages(vma); |
| if (err) |
| goto err_unpin; |
| |
| vma->page_sizes = vma->obj->mm.page_sizes; |
| atomic_inc(&vma->pages_count); |
| |
| return 0; |
| |
| err_unpin: |
| __i915_gem_object_unpin_pages(vma->obj); |
| |
| return err; |
| } |
| |
| static void __vma_put_pages(struct i915_vma *vma, unsigned int count) |
| { |
| /* We allocate under vma_get_pages, so beware the shrinker */ |
| GEM_BUG_ON(atomic_read(&vma->pages_count) < count); |
| |
| if (atomic_sub_return(count, &vma->pages_count) == 0) { |
| if (vma->pages != vma->obj->mm.pages) { |
| sg_free_table(vma->pages); |
| kfree(vma->pages); |
| } |
| vma->pages = NULL; |
| |
| i915_gem_object_unpin_pages(vma->obj); |
| } |
| } |
| |
| I915_SELFTEST_EXPORT void i915_vma_put_pages(struct i915_vma *vma) |
| { |
| if (atomic_add_unless(&vma->pages_count, -1, 1)) |
| return; |
| |
| __vma_put_pages(vma, 1); |
| } |
| |
| static void vma_unbind_pages(struct i915_vma *vma) |
| { |
| unsigned int count; |
| |
| lockdep_assert_held(&vma->vm->mutex); |
| |
| /* The upper portion of pages_count is the number of bindings */ |
| count = atomic_read(&vma->pages_count); |
| count >>= I915_VMA_PAGES_BIAS; |
| GEM_BUG_ON(!count); |
| |
| __vma_put_pages(vma, count | count << I915_VMA_PAGES_BIAS); |
| } |
| |
| int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, |
| u64 size, u64 alignment, u64 flags) |
| { |
| struct i915_vma_work *work = NULL; |
| struct dma_fence *moving = NULL; |
| struct i915_vma_resource *vma_res = NULL; |
| intel_wakeref_t wakeref = 0; |
| unsigned int bound; |
| int err; |
| |
| assert_vma_held(vma); |
| GEM_BUG_ON(!ww); |
| |
| BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND); |
| BUILD_BUG_ON(PIN_USER != I915_VMA_LOCAL_BIND); |
| |
| GEM_BUG_ON(!(flags & (PIN_USER | PIN_GLOBAL))); |
| |
| /* First try and grab the pin without rebinding the vma */ |
| if (try_qad_pin(vma, flags)) |
| return 0; |
| |
| err = i915_vma_get_pages(vma); |
| if (err) |
| return err; |
| |
| if (flags & PIN_GLOBAL) |
| wakeref = intel_runtime_pm_get(&vma->vm->i915->runtime_pm); |
| |
| if (flags & vma->vm->bind_async_flags) { |
| /* lock VM */ |
| err = i915_vm_lock_objects(vma->vm, ww); |
| if (err) |
| goto err_rpm; |
| |
| work = i915_vma_work(); |
| if (!work) { |
| err = -ENOMEM; |
| goto err_rpm; |
| } |
| |
| work->vm = vma->vm; |
| |
| err = i915_gem_object_get_moving_fence(vma->obj, &moving); |
| if (err) |
| goto err_rpm; |
| |
| dma_fence_work_chain(&work->base, moving); |
| |
| /* Allocate enough page directories to used PTE */ |
| if (vma->vm->allocate_va_range) { |
| err = i915_vm_alloc_pt_stash(vma->vm, |
| &work->stash, |
| vma->size); |
| if (err) |
| goto err_fence; |
| |
| err = i915_vm_map_pt_stash(vma->vm, &work->stash); |
| if (err) |
| goto err_fence; |
| } |
| } |
| |
| vma_res = i915_vma_resource_alloc(); |
| if (IS_ERR(vma_res)) { |
| err = PTR_ERR(vma_res); |
| goto err_fence; |
| } |
| |
| /* |
| * Differentiate between user/kernel vma inside the aliasing-ppgtt. |
| * |
| * We conflate the Global GTT with the user's vma when using the |
| * aliasing-ppgtt, but it is still vitally important to try and |
| * keep the use cases distinct. For example, userptr objects are |
| * not allowed inside the Global GTT as that will cause lock |
| * inversions when we have to evict them the mmu_notifier callbacks - |
| * but they are allowed to be part of the user ppGTT which can never |
| * be mapped. As such we try to give the distinct users of the same |
| * mutex, distinct lockclasses [equivalent to how we keep i915_ggtt |
| * and i915_ppgtt separate]. |
| * |
| * NB this may cause us to mask real lock inversions -- while the |
| * code is safe today, lockdep may not be able to spot future |
| * transgressions. |
| */ |
| err = mutex_lock_interruptible_nested(&vma->vm->mutex, |
| !(flags & PIN_GLOBAL)); |
| if (err) |
| goto err_vma_res; |
| |
| /* No more allocations allowed now we hold vm->mutex */ |
| |
| if (unlikely(i915_vma_is_closed(vma))) { |
| err = -ENOENT; |
| goto err_unlock; |
| } |
| |
| bound = atomic_read(&vma->flags); |
| if (unlikely(bound & I915_VMA_ERROR)) { |
| err = -ENOMEM; |
| goto err_unlock; |
| } |
| |
| if (unlikely(!((bound + 1) & I915_VMA_PIN_MASK))) { |
| err = -EAGAIN; /* pins are meant to be fairly temporary */ |
| goto err_unlock; |
| } |
| |
| if (unlikely(!(flags & ~bound & I915_VMA_BIND_MASK))) { |
| if (!(flags & PIN_VALIDATE)) |
| __i915_vma_pin(vma); |
| goto err_unlock; |
| } |
| |
| err = i915_active_acquire(&vma->active); |
| if (err) |
| goto err_unlock; |
| |
| if (!(bound & I915_VMA_BIND_MASK)) { |
| err = i915_vma_insert(vma, ww, size, alignment, flags); |
| if (err) |
| goto err_active; |
| |
| if (i915_is_ggtt(vma->vm)) |
| __i915_vma_set_map_and_fenceable(vma); |
| } |
| |
| GEM_BUG_ON(!vma->pages); |
| err = i915_vma_bind(vma, |
| vma->obj->cache_level, |
| flags, work, vma_res); |
| vma_res = NULL; |
| if (err) |
| goto err_remove; |
| |
| /* There should only be at most 2 active bindings (user, global) */ |
| GEM_BUG_ON(bound + I915_VMA_PAGES_ACTIVE < bound); |
| atomic_add(I915_VMA_PAGES_ACTIVE, &vma->pages_count); |
| list_move_tail(&vma->vm_link, &vma->vm->bound_list); |
| |
| if (!(flags & PIN_VALIDATE)) { |
| __i915_vma_pin(vma); |
| GEM_BUG_ON(!i915_vma_is_pinned(vma)); |
| } |
| GEM_BUG_ON(!i915_vma_is_bound(vma, flags)); |
| GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags)); |
| |
| err_remove: |
| if (!i915_vma_is_bound(vma, I915_VMA_BIND_MASK)) { |
| i915_vma_detach(vma); |
| drm_mm_remove_node(&vma->node); |
| } |
| err_active: |
| i915_active_release(&vma->active); |
| err_unlock: |
| mutex_unlock(&vma->vm->mutex); |
| err_vma_res: |
| i915_vma_resource_free(vma_res); |
| err_fence: |
| if (work) |
| dma_fence_work_commit_imm(&work->base); |
| err_rpm: |
| if (wakeref) |
| intel_runtime_pm_put(&vma->vm->i915->runtime_pm, wakeref); |
| |
| if (moving) |
| dma_fence_put(moving); |
| |
| i915_vma_put_pages(vma); |
| return err; |
| } |
| |
| static void flush_idle_contexts(struct intel_gt *gt) |
| { |
| struct intel_engine_cs *engine; |
| enum intel_engine_id id; |
| |
| for_each_engine(engine, gt, id) |
| intel_engine_flush_barriers(engine); |
| |
| intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT); |
| } |
| |
| static int __i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, |
| u32 align, unsigned int flags) |
| { |
| struct i915_address_space *vm = vma->vm; |
| int err; |
| |
| do { |
| err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL); |
| |
| if (err != -ENOSPC) { |
| if (!err) { |
| err = i915_vma_wait_for_bind(vma); |
| if (err) |
| i915_vma_unpin(vma); |
| } |
| return err; |
| } |
| |
| /* Unlike i915_vma_pin, we don't take no for an answer! */ |
| flush_idle_contexts(vm->gt); |
| if (mutex_lock_interruptible(&vm->mutex) == 0) { |
| /* |
| * We pass NULL ww here, as we don't want to unbind |
| * locked objects when called from execbuf when pinning |
| * is removed. This would probably regress badly. |
| */ |
| i915_gem_evict_vm(vm, NULL); |
| mutex_unlock(&vm->mutex); |
| } |
| } while (1); |
| } |
| |
| int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww, |
| u32 align, unsigned int flags) |
| { |
| struct i915_gem_ww_ctx _ww; |
| int err; |
| |
| GEM_BUG_ON(!i915_vma_is_ggtt(vma)); |
| |
| if (ww) |
| return __i915_ggtt_pin(vma, ww, align, flags); |
| |
| lockdep_assert_not_held(&vma->obj->base.resv->lock.base); |
| |
| for_i915_gem_ww(&_ww, err, true) { |
| err = i915_gem_object_lock(vma->obj, &_ww); |
| if (!err) |
| err = __i915_ggtt_pin(vma, &_ww, align, flags); |
| } |
| |
| return err; |
| } |
| |
| static void __vma_close(struct i915_vma *vma, struct intel_gt *gt) |
| { |
| /* |
| * We defer actually closing, unbinding and destroying the VMA until |
| * the next idle point, or if the object is freed in the meantime. By |
| * postponing the unbind, we allow for it to be resurrected by the |
| * client, avoiding the work required to rebind the VMA. This is |
| * advantageous for DRI, where the client/server pass objects |
| * between themselves, temporarily opening a local VMA to the |
| * object, and then closing it again. The same object is then reused |
| * on the next frame (or two, depending on the depth of the swap queue) |
| * causing us to rebind the VMA once more. This ends up being a lot |
| * of wasted work for the steady state. |
| */ |
| GEM_BUG_ON(i915_vma_is_closed(vma)); |
| list_add(&vma->closed_link, >->closed_vma); |
| } |
| |
| void i915_vma_close(struct i915_vma *vma) |
| { |
| struct intel_gt *gt = vma->vm->gt; |
| unsigned long flags; |
| |
| if (i915_vma_is_ggtt(vma)) |
| return; |
| |
| GEM_BUG_ON(!atomic_read(&vma->open_count)); |
| if (atomic_dec_and_lock_irqsave(&vma->open_count, |
| >->closed_lock, |
| flags)) { |
| __vma_close(vma, gt); |
| spin_unlock_irqrestore(>->closed_lock, flags); |
| } |
| } |
| |
| static void __i915_vma_remove_closed(struct i915_vma *vma) |
| { |
| list_del_init(&vma->closed_link); |
| } |
| |
| void i915_vma_reopen(struct i915_vma *vma) |
| { |
| struct intel_gt *gt = vma->vm->gt; |
| |
| spin_lock_irq(>->closed_lock); |
| if (i915_vma_is_closed(vma)) |
| __i915_vma_remove_closed(vma); |
| spin_unlock_irq(>->closed_lock); |
| } |
| |
| static void force_unbind(struct i915_vma *vma) |
| { |
| if (!drm_mm_node_allocated(&vma->node)) |
| return; |
| |
| atomic_and(~I915_VMA_PIN_MASK, &vma->flags); |
| WARN_ON(__i915_vma_unbind(vma)); |
| GEM_BUG_ON(drm_mm_node_allocated(&vma->node)); |
| } |
| |
| static void release_references(struct i915_vma *vma, bool vm_ddestroy) |
| { |
| struct drm_i915_gem_object *obj = vma->obj; |
| struct intel_gt *gt = vma->vm->gt; |
| |
| GEM_BUG_ON(i915_vma_is_active(vma)); |
| |
| spin_lock(&obj->vma.lock); |
| list_del(&vma->obj_link); |
| if (!RB_EMPTY_NODE(&vma->obj_node)) |
| rb_erase(&vma->obj_node, &obj->vma.tree); |
| |
| spin_unlock(&obj->vma.lock); |
| |
| spin_lock_irq(>->closed_lock); |
| __i915_vma_remove_closed(vma); |
| spin_unlock_irq(>->closed_lock); |
| |
| if (vm_ddestroy) |
| i915_vm_resv_put(vma->vm); |
| |
| i915_active_fini(&vma->active); |
| GEM_WARN_ON(vma->resource); |
| i915_vma_free(vma); |
| } |
| |
| /** |
| * i915_vma_destroy_locked - Remove all weak reference to the vma and put |
| * the initial reference. |
| * |
| * This function should be called when it's decided the vma isn't needed |
| * anymore. The caller must assure that it doesn't race with another lookup |
| * plus destroy, typically by taking an appropriate reference. |
| * |
| * Current callsites are |
| * - __i915_gem_object_pages_fini() |
| * - __i915_vm_close() - Blocks the above function by taking a reference on |
| * the object. |
| * - __i915_vma_parked() - Blocks the above functions by taking a reference |
| * on the vm and a reference on the object. Also takes the object lock so |
| * destruction from __i915_vma_parked() can be blocked by holding the |
| * object lock. Since the object lock is only allowed from within i915 with |
| * an object refcount, holding the object lock also implicitly blocks the |
| * vma freeing from __i915_gem_object_pages_fini(). |
| * |
| * Because of locks taken during destruction, a vma is also guaranteed to |
| * stay alive while the following locks are held if it was looked up while |
| * holding one of the locks: |
| * - vm->mutex |
| * - obj->vma.lock |
| * - gt->closed_lock |
| */ |
| void i915_vma_destroy_locked(struct i915_vma *vma) |
| { |
| lockdep_assert_held(&vma->vm->mutex); |
| |
| force_unbind(vma); |
| list_del_init(&vma->vm_link); |
| release_references(vma, false); |
| } |
| |
| void i915_vma_destroy(struct i915_vma *vma) |
| { |
| bool vm_ddestroy; |
| |
| mutex_lock(&vma->vm->mutex); |
| force_unbind(vma); |
| list_del_init(&vma->vm_link); |
| vm_ddestroy = vma->vm_ddestroy; |
| vma->vm_ddestroy = false; |
| mutex_unlock(&vma->vm->mutex); |
| release_references(vma, vm_ddestroy); |
| } |
| |
| void i915_vma_parked(struct intel_gt *gt) |
| { |
| struct i915_vma *vma, *next; |
| LIST_HEAD(closed); |
| |
| spin_lock_irq(>->closed_lock); |
| list_for_each_entry_safe(vma, next, >->closed_vma, closed_link) { |
| struct drm_i915_gem_object *obj = vma->obj; |
| struct i915_address_space *vm = vma->vm; |
| |
| /* XXX All to avoid keeping a reference on i915_vma itself */ |
| |
| if (!kref_get_unless_zero(&obj->base.refcount)) |
| continue; |
| |
| if (!i915_vm_tryget(vm)) { |
| i915_gem_object_put(obj); |
| continue; |
| } |
| |
| list_move(&vma->closed_link, &closed); |
| } |
| spin_unlock_irq(>->closed_lock); |
| |
| /* As the GT is held idle, no vma can be reopened as we destroy them */ |
| list_for_each_entry_safe(vma, next, &closed, closed_link) { |
| struct drm_i915_gem_object *obj = vma->obj; |
| struct i915_address_space *vm = vma->vm; |
| |
| if (i915_gem_object_trylock(obj, NULL)) { |
| INIT_LIST_HEAD(&vma->closed_link); |
| i915_vma_destroy(vma); |
| i915_gem_object_unlock(obj); |
| } else { |
| /* back you go.. */ |
| spin_lock_irq(>->closed_lock); |
| list_add(&vma->closed_link, >->closed_vma); |
| spin_unlock_irq(>->closed_lock); |
| } |
| |
| i915_gem_object_put(obj); |
| i915_vm_put(vm); |
| } |
| } |
| |
| static void __i915_vma_iounmap(struct i915_vma *vma) |
| { |
| GEM_BUG_ON(i915_vma_is_pinned(vma)); |
| |
| if (vma->iomap == NULL) |
| return; |
| |
| io_mapping_unmap(vma->iomap); |
| vma->iomap = NULL; |
| } |
| |
| void i915_vma_revoke_mmap(struct i915_vma *vma) |
| { |
| struct drm_vma_offset_node *node; |
| u64 vma_offset; |
| |
| if (!i915_vma_has_userfault(vma)) |
| return; |
| |
| GEM_BUG_ON(!i915_vma_is_map_and_fenceable(vma)); |
| GEM_BUG_ON(!vma->obj->userfault_count); |
| |
| node = &vma->mmo->vma_node; |
| vma_offset = vma->ggtt_view.partial.offset << PAGE_SHIFT; |
| unmap_mapping_range(vma->vm->i915->drm.anon_inode->i_mapping, |
| drm_vma_node_offset_addr(node) + vma_offset, |
| vma->size, |
| 1); |
| |
| i915_vma_unset_userfault(vma); |
| if (!--vma->obj->userfault_count) |
| list_del(&vma->obj->userfault_link); |
| } |
| |
| static int |
| __i915_request_await_bind(struct i915_request *rq, struct i915_vma *vma) |
| { |
| return __i915_request_await_exclusive(rq, &vma->active); |
| } |
| |
| static int __i915_vma_move_to_active(struct i915_vma *vma, struct i915_request *rq) |
| { |
| int err; |
| |
| /* Wait for the vma to be bound before we start! */ |
| err = __i915_request_await_bind(rq, vma); |
| if (err) |
| return err; |
| |
| return i915_active_add_request(&vma->active, rq); |
| } |
| |
| int _i915_vma_move_to_active(struct i915_vma *vma, |
| struct i915_request *rq, |
| struct dma_fence *fence, |
| unsigned int flags) |
| { |
| struct drm_i915_gem_object *obj = vma->obj; |
| int err; |
| |
| assert_object_held(obj); |
| |
| GEM_BUG_ON(!vma->pages); |
| |
| err = __i915_vma_move_to_active(vma, rq); |
| if (unlikely(err)) |
| return err; |
| |
| /* |
| * Reserve fences slot early to prevent an allocation after preparing |
| * the workload and associating fences with dma_resv. |
| */ |
| if (fence && !(flags & __EXEC_OBJECT_NO_RESERVE)) { |
| struct dma_fence *curr; |
| int idx; |
| |
| dma_fence_array_for_each(curr, idx, fence) |
| ; |
| err = dma_resv_reserve_fences(vma->obj->base.resv, idx); |
| if (unlikely(err)) |
| return err; |
| } |
| |
| if (flags & EXEC_OBJECT_WRITE) { |
| struct intel_frontbuffer *front; |
| |
| front = __intel_frontbuffer_get(obj); |
| if (unlikely(front)) { |
| if (intel_frontbuffer_invalidate(front, ORIGIN_CS)) |
| i915_active_add_request(&front->write, rq); |
| intel_frontbuffer_put(front); |
| } |
| } |
| |
| if (fence) { |
| struct dma_fence *curr; |
| enum dma_resv_usage usage; |
| int idx; |
| |
| obj->read_domains = 0; |
| if (flags & EXEC_OBJECT_WRITE) { |
| usage = DMA_RESV_USAGE_WRITE; |
| obj->write_domain = I915_GEM_DOMAIN_RENDER; |
| } else { |
| usage = DMA_RESV_USAGE_READ; |
| } |
| |
| dma_fence_array_for_each(curr, idx, fence) |
| dma_resv_add_fence(vma->obj->base.resv, curr, usage); |
| } |
| |
| if (flags & EXEC_OBJECT_NEEDS_FENCE && vma->fence) |
| i915_active_add_request(&vma->fence->active, rq); |
| |
| obj->read_domains |= I915_GEM_GPU_DOMAINS; |
| obj->mm.dirty = true; |
| |
| GEM_BUG_ON(!i915_vma_is_active(vma)); |
| return 0; |
| } |
| |
| struct dma_fence *__i915_vma_evict(struct i915_vma *vma, bool async) |
| { |
| struct i915_vma_resource *vma_res = vma->resource; |
| struct dma_fence *unbind_fence; |
| |
| GEM_BUG_ON(i915_vma_is_pinned(vma)); |
| assert_vma_held_evict(vma); |
| |
| if (i915_vma_is_map_and_fenceable(vma)) { |
| /* Force a pagefault for domain tracking on next user access */ |
| i915_vma_revoke_mmap(vma); |
| |
| /* |
| * Check that we have flushed all writes through the GGTT |
| * before the unbind, other due to non-strict nature of those |
| * indirect writes they may end up referencing the GGTT PTE |
| * after the unbind. |
| * |
| * Note that we may be concurrently poking at the GGTT_WRITE |
| * bit from set-domain, as we mark all GGTT vma associated |
| * with an object. We know this is for another vma, as we |
| * are currently unbinding this one -- so if this vma will be |
| * reused, it will be refaulted and have its dirty bit set |
| * before the next write. |
| */ |
| i915_vma_flush_writes(vma); |
| |
| /* release the fence reg _after_ flushing */ |
| i915_vma_revoke_fence(vma); |
| |
| __i915_vma_iounmap(vma); |
| clear_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(vma)); |
| } |
| GEM_BUG_ON(vma->fence); |
| GEM_BUG_ON(i915_vma_has_userfault(vma)); |
| |
| /* Object backend must be async capable. */ |
| GEM_WARN_ON(async && !vma->resource->bi.pages_rsgt); |
| |
| /* If vm is not open, unbind is a nop. */ |
| vma_res->needs_wakeref = i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND) && |
| kref_read(&vma->vm->ref); |
| vma_res->skip_pte_rewrite = !kref_read(&vma->vm->ref) || |
| vma->vm->skip_pte_rewrite; |
| trace_i915_vma_unbind(vma); |
| |
| unbind_fence = i915_vma_resource_unbind(vma_res); |
| vma->resource = NULL; |
| |
| atomic_and(~(I915_VMA_BIND_MASK | I915_VMA_ERROR | I915_VMA_GGTT_WRITE), |
| &vma->flags); |
| |
| i915_vma_detach(vma); |
| |
| if (!async && unbind_fence) { |
| dma_fence_wait(unbind_fence, false); |
| dma_fence_put(unbind_fence); |
| unbind_fence = NULL; |
| } |
| |
| /* |
| * Binding itself may not have completed until the unbind fence signals, |
| * so don't drop the pages until that happens, unless the resource is |
| * async_capable. |
| */ |
| |
| vma_unbind_pages(vma); |
| return unbind_fence; |
| } |
| |
| int __i915_vma_unbind(struct i915_vma *vma) |
| { |
| int ret; |
| |
| lockdep_assert_held(&vma->vm->mutex); |
| assert_vma_held_evict(vma); |
| |
| if (!drm_mm_node_allocated(&vma->node)) |
| return 0; |
| |
| if (i915_vma_is_pinned(vma)) { |
| vma_print_allocator(vma, "is pinned"); |
| return -EAGAIN; |
| } |
| |
| /* |
| * After confirming that no one else is pinning this vma, wait for |
| * any laggards who may have crept in during the wait (through |
| * a residual pin skipping the vm->mutex) to complete. |
| */ |
| ret = i915_vma_sync(vma); |
| if (ret) |
| return ret; |
| |
| GEM_BUG_ON(i915_vma_is_active(vma)); |
| __i915_vma_evict(vma, false); |
| |
| drm_mm_remove_node(&vma->node); /* pairs with i915_vma_release() */ |
| return 0; |
| } |
| |
| static struct dma_fence *__i915_vma_unbind_async(struct i915_vma *vma) |
| { |
| struct dma_fence *fence; |
| |
| lockdep_assert_held(&vma->vm->mutex); |
| |
| if (!drm_mm_node_allocated(&vma->node)) |
| return NULL; |
| |
| if (i915_vma_is_pinned(vma) || |
| &vma->obj->mm.rsgt->table != vma->resource->bi.pages) |
| return ERR_PTR(-EAGAIN); |
| |
| /* |
| * We probably need to replace this with awaiting the fences of the |
| * object's dma_resv when the vma active goes away. When doing that |
| * we need to be careful to not add the vma_resource unbind fence |
| * immediately to the object's dma_resv, because then unbinding |
| * the next vma from the object, in case there are many, will |
| * actually await the unbinding of the previous vmas, which is |
| * undesirable. |
| */ |
| if (i915_sw_fence_await_active(&vma->resource->chain, &vma->active, |
| I915_ACTIVE_AWAIT_EXCL | |
| I915_ACTIVE_AWAIT_ACTIVE) < 0) { |
| return ERR_PTR(-EBUSY); |
| } |
| |
| fence = __i915_vma_evict(vma, true); |
| |
| drm_mm_remove_node(&vma->node); /* pairs with i915_vma_release() */ |
| |
| return fence; |
| } |
| |
| int i915_vma_unbind(struct i915_vma *vma) |
| { |
| struct i915_address_space *vm = vma->vm; |
| intel_wakeref_t wakeref = 0; |
| int err; |
| |
| assert_object_held_shared(vma->obj); |
| |
| /* Optimistic wait before taking the mutex */ |
| err = i915_vma_sync(vma); |
| if (err) |
| return err; |
| |
| if (!drm_mm_node_allocated(&vma->node)) |
| return 0; |
| |
| if (i915_vma_is_pinned(vma)) { |
| vma_print_allocator(vma, "is pinned"); |
| return -EAGAIN; |
| } |
| |
| if (i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND)) |
| /* XXX not always required: nop_clear_range */ |
| wakeref = intel_runtime_pm_get(&vm->i915->runtime_pm); |
| |
| err = mutex_lock_interruptible_nested(&vma->vm->mutex, !wakeref); |
| if (err) |
| goto out_rpm; |
| |
| err = __i915_vma_unbind(vma); |
| mutex_unlock(&vm->mutex); |
| |
| out_rpm: |
| if (wakeref) |
| intel_runtime_pm_put(&vm->i915->runtime_pm, wakeref); |
| return err; |
| } |
| |
| int i915_vma_unbind_async(struct i915_vma *vma, bool trylock_vm) |
| { |
| struct drm_i915_gem_object *obj = vma->obj; |
| struct i915_address_space *vm = vma->vm; |
| intel_wakeref_t wakeref = 0; |
| struct dma_fence *fence; |
| int err; |
| |
| /* |
| * We need the dma-resv lock since we add the |
| * unbind fence to the dma-resv object. |
| */ |
| assert_object_held(obj); |
| |
| if (!drm_mm_node_allocated(&vma->node)) |
| return 0; |
| |
| if (i915_vma_is_pinned(vma)) { |
| vma_print_allocator(vma, "is pinned"); |
| return -EAGAIN; |
| } |
| |
| if (!obj->mm.rsgt) |
| return -EBUSY; |
| |
| err = dma_resv_reserve_fences(obj->base.resv, 1); |
| if (err) |
| return -EBUSY; |
| |
| /* |
| * It would be great if we could grab this wakeref from the |
| * async unbind work if needed, but we can't because it uses |
| * kmalloc and it's in the dma-fence signalling critical path. |
| */ |
| if (i915_vma_is_bound(vma, I915_VMA_GLOBAL_BIND)) |
| wakeref = intel_runtime_pm_get(&vm->i915->runtime_pm); |
| |
| if (trylock_vm && !mutex_trylock(&vm->mutex)) { |
| err = -EBUSY; |
| goto out_rpm; |
| } else if (!trylock_vm) { |
| err = mutex_lock_interruptible_nested(&vm->mutex, !wakeref); |
| if (err) |
| goto out_rpm; |
| } |
| |
| fence = __i915_vma_unbind_async(vma); |
| mutex_unlock(&vm->mutex); |
| if (IS_ERR_OR_NULL(fence)) { |
| err = PTR_ERR_OR_ZERO(fence); |
| goto out_rpm; |
| } |
| |
| dma_resv_add_fence(obj->base.resv, fence, DMA_RESV_USAGE_READ); |
| dma_fence_put(fence); |
| |
| out_rpm: |
| if (wakeref) |
| intel_runtime_pm_put(&vm->i915->runtime_pm, wakeref); |
| return err; |
| } |
| |
| int i915_vma_unbind_unlocked(struct i915_vma *vma) |
| { |
| int err; |
| |
| i915_gem_object_lock(vma->obj, NULL); |
| err = i915_vma_unbind(vma); |
| i915_gem_object_unlock(vma->obj); |
| |
| return err; |
| } |
| |
| struct i915_vma *i915_vma_make_unshrinkable(struct i915_vma *vma) |
| { |
| i915_gem_object_make_unshrinkable(vma->obj); |
| return vma; |
| } |
| |
| void i915_vma_make_shrinkable(struct i915_vma *vma) |
| { |
| i915_gem_object_make_shrinkable(vma->obj); |
| } |
| |
| void i915_vma_make_purgeable(struct i915_vma *vma) |
| { |
| i915_gem_object_make_purgeable(vma->obj); |
| } |
| |
| #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) |
| #include "selftests/i915_vma.c" |
| #endif |
| |
| void i915_vma_module_exit(void) |
| { |
| kmem_cache_destroy(slab_vmas); |
| } |
| |
| int __init i915_vma_module_init(void) |
| { |
| slab_vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN); |
| if (!slab_vmas) |
| return -ENOMEM; |
| |
| return 0; |
| } |