Op 15-07-2020 om 13:51 schreef Chris Wilson:
> Our goal is to pull all memory reservations (next iteration
> obj->ops->get_pages()) under a ww_mutex, and to align those reservations
> with other drivers, i.e. control all such allocations with the
> reservation_ww_class. Currently, this is under the purview of the
> obj->mm.mutex, and while obj->mm remains an embedded struct we can
> "simply" switch to using the reservation_ww_class obj->base.resv->lock
>
> The major consequence is the impact on the shrinker paths as the
> reservation_ww_class is used to wrap allocations, and a ww_mutex does
> not support subclassing so we cannot do our usual trick of knowing that
> we never recurse inside the shrinker and instead have to finish the
> reclaim with a trylock. This may result in us failing to release the
> pages after having released the vma. This will have to do until a better
> idea comes along.
>
> However, this step only converts the mutex over and continues to treat
> everything as a single allocation and pinning the pages. With the
> ww_mutex in place we can remove the temporary pinning, as we can then
> reserve all storage en masse.
>
> One last thing to do: kill the implict page pinning for active vma.
> This will require us to invalidate the vma->pages when the backing store
> is removed (and we expect that while the vma is active, we mark the
> backing store as active so that it cannot be removed while the HW is
> busy.)
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gem/i915_gem_clflush.c | 20 +-
> drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 18 +-
> drivers/gpu/drm/i915/gem/i915_gem_domain.c | 65 ++----
> .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 40 +++-
> drivers/gpu/drm/i915/gem/i915_gem_object.c | 8 +-
> drivers/gpu/drm/i915/gem/i915_gem_object.h | 37 +--
> .../gpu/drm/i915/gem/i915_gem_object_types.h | 1 -
> drivers/gpu/drm/i915/gem/i915_gem_pages.c | 134 ++++++-----
> drivers/gpu/drm/i915/gem/i915_gem_phys.c | 8 +-
> drivers/gpu/drm/i915/gem/i915_gem_shrinker.c | 13 +-
> drivers/gpu/drm/i915/gem/i915_gem_tiling.c | 2 -
> drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 15 +-
> .../gpu/drm/i915/gem/selftests/huge_pages.c | 32 ++-
> .../i915/gem/selftests/i915_gem_coherency.c | 14 +-
> .../drm/i915/gem/selftests/i915_gem_context.c | 10 +-
> .../drm/i915/gem/selftests/i915_gem_mman.c | 2 +
> drivers/gpu/drm/i915/gt/gen6_ppgtt.c | 2 -
> drivers/gpu/drm/i915/gt/gen8_ppgtt.c | 1 -
> drivers/gpu/drm/i915/gt/intel_ggtt.c | 5 +-
> drivers/gpu/drm/i915/gt/intel_gtt.h | 2 -
> drivers/gpu/drm/i915/gt/intel_ppgtt.c | 1 +
> drivers/gpu/drm/i915/i915_gem.c | 16 +-
> drivers/gpu/drm/i915/i915_vma.c | 217 +++++++-----------
> drivers/gpu/drm/i915/i915_vma_types.h | 6 -
> drivers/gpu/drm/i915/mm/i915_acquire_ctx.c | 12 +-
> drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 4 +-
> .../drm/i915/selftests/intel_memory_region.c | 17 +-
> 27 files changed, 313 insertions(+), 389 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_clflush.c b/drivers/gpu/drm/i915/gem/i915_gem_clflush.c
> index bc0223716906..a32fd0d5570b 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_clflush.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_clflush.c
> @@ -27,16 +27,8 @@ static void __do_clflush(struct drm_i915_gem_object *obj)
> static int clflush_work(struct dma_fence_work *base)
> {
> struct clflush *clflush = container_of(base, typeof(*clflush), base);
> - struct drm_i915_gem_object *obj = clflush->obj;
> - int err;
> -
> - err = i915_gem_object_pin_pages(obj);
> - if (err)
> - return err;
> -
> - __do_clflush(obj);
> - i915_gem_object_unpin_pages(obj);
>
> + __do_clflush(clflush->obj);
> return 0;
> }
>
> @@ -44,7 +36,7 @@ static void clflush_release(struct dma_fence_work *base)
> {
> struct clflush *clflush = container_of(base, typeof(*clflush), base);
>
> - i915_gem_object_put(clflush->obj);
> + i915_gem_object_unpin_pages(clflush->obj);
> }
>
> static const struct dma_fence_work_ops clflush_ops = {
> @@ -63,8 +55,14 @@ static struct clflush *clflush_work_create(struct drm_i915_gem_object *obj)
> if (!clflush)
> return NULL;
>
> + if (__i915_gem_object_get_pages_locked(obj)) {
> + kfree(clflush);
> + return NULL;
> + }
> +
> dma_fence_work_init(&clflush->base, &clflush_ops);
> - clflush->obj = i915_gem_object_get(obj); /* obj <-> clflush cycle */
> + __i915_gem_object_pin_pages(obj);
> + clflush->obj = obj; /* Beware the obj.resv <-> clflush fence cycle */
>
> return clflush;
> }
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
> index 2679380159fc..049a15e6b496 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
> @@ -124,19 +124,12 @@ static int i915_gem_begin_cpu_access(struct dma_buf *dma_buf, enum dma_data_dire
> bool write = (direction == DMA_BIDIRECTIONAL || direction == DMA_TO_DEVICE);
> int err;
>
> - err = i915_gem_object_pin_pages(obj);
> - if (err)
> - return err;
> -
> err = i915_gem_object_lock_interruptible(obj);
> if (err)
> - goto out;
> + return err;
>
> err = i915_gem_object_set_to_cpu_domain(obj, write);
> i915_gem_object_unlock(obj);
> -
> -out:
> - i915_gem_object_unpin_pages(obj);
> return err;
> }
>
> @@ -145,19 +138,12 @@ static int i915_gem_end_cpu_access(struct dma_buf *dma_buf, enum dma_data_direct
> struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf);
> int err;
>
> - err = i915_gem_object_pin_pages(obj);
> - if (err)
> - return err;
> -
> err = i915_gem_object_lock_interruptible(obj);
> if (err)
> - goto out;
> + return err;
>
> err = i915_gem_object_set_to_gtt_domain(obj, false);
> i915_gem_object_unlock(obj);
> -
> -out:
> - i915_gem_object_unpin_pages(obj);
> return err;
> }
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_domain.c b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
> index 7f76fc68f498..30e4b163588b 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_domain.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
> @@ -70,7 +70,7 @@ i915_gem_object_set_to_wc_domain(struct drm_i915_gem_object *obj, bool write)
> * continue to assume that the obj remained out of the CPU cached
> * domain.
> */
> - ret = i915_gem_object_pin_pages(obj);
> + ret = __i915_gem_object_get_pages_locked(obj);
> if (ret)
> return ret;
>
> @@ -94,7 +94,6 @@ i915_gem_object_set_to_wc_domain(struct drm_i915_gem_object *obj, bool write)
> obj->mm.dirty = true;
> }
>
> - i915_gem_object_unpin_pages(obj);
> return 0;
> }
>
> @@ -131,7 +130,7 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
> * continue to assume that the obj remained out of the CPU cached
> * domain.
> */
> - ret = i915_gem_object_pin_pages(obj);
> + ret = __i915_gem_object_get_pages_locked(obj);
> if (ret)
> return ret;
>
> @@ -163,7 +162,6 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
> spin_unlock(&obj->vma.lock);
> }
>
> - i915_gem_object_unpin_pages(obj);
> return 0;
> }
>
> @@ -532,13 +530,9 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
> * continue to assume that the obj remained out of the CPU cached
> * domain.
> */
> - err = i915_gem_object_pin_pages(obj);
> - if (err)
> - goto out;
> -
> err = i915_gem_object_lock_interruptible(obj);
> if (err)
> - goto out_unpin;
> + goto out;
>
> if (read_domains & I915_GEM_DOMAIN_WC)
> err = i915_gem_object_set_to_wc_domain(obj, write_domain);
> @@ -555,8 +549,6 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
> if (write_domain)
> i915_gem_object_invalidate_frontbuffer(obj, ORIGIN_CPU);
>
> -out_unpin:
> - i915_gem_object_unpin_pages(obj);
> out:
> i915_gem_object_put(obj);
> return err;
> @@ -572,11 +564,13 @@ int i915_gem_object_prepare_read(struct drm_i915_gem_object *obj,
> {
> int ret;
>
> + assert_object_held(obj);
> +
> *needs_clflush = 0;
> if (!i915_gem_object_has_struct_page(obj))
> return -ENODEV;
>
> - ret = i915_gem_object_lock_interruptible(obj);
> + ret = __i915_gem_object_get_pages_locked(obj);
> if (ret)
> return ret;
>
> @@ -584,19 +578,11 @@ int i915_gem_object_prepare_read(struct drm_i915_gem_object *obj,
> I915_WAIT_INTERRUPTIBLE,
> MAX_SCHEDULE_TIMEOUT);
> if (ret)
> - goto err_unlock;
> -
> - ret = i915_gem_object_pin_pages(obj);
> - if (ret)
> - goto err_unlock;
> + return ret;
>
> if (obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ ||
> !static_cpu_has(X86_FEATURE_CLFLUSH)) {
> - ret = i915_gem_object_set_to_cpu_domain(obj, false);
> - if (ret)
> - goto err_unpin;
> - else
> - goto out;
> + return i915_gem_object_set_to_cpu_domain(obj, false);
> }
>
> i915_gem_object_flush_write_domain(obj, ~I915_GEM_DOMAIN_CPU);
> @@ -610,15 +596,7 @@ int i915_gem_object_prepare_read(struct drm_i915_gem_object *obj,
> !(obj->read_domains & I915_GEM_DOMAIN_CPU))
> *needs_clflush = CLFLUSH_BEFORE;
>
> -out:
> - /* return with the pages pinned */
> return 0;
> -
> -err_unpin:
> - i915_gem_object_unpin_pages(obj);
> -err_unlock:
> - i915_gem_object_unlock(obj);
> - return ret;
> }
>
> int i915_gem_object_prepare_write(struct drm_i915_gem_object *obj,
> @@ -626,11 +604,13 @@ int i915_gem_object_prepare_write(struct drm_i915_gem_object *obj,
> {
> int ret;
>
> + assert_object_held(obj);
> +
> *needs_clflush = 0;
> if (!i915_gem_object_has_struct_page(obj))
> return -ENODEV;
>
> - ret = i915_gem_object_lock_interruptible(obj);
> + ret = __i915_gem_object_get_pages_locked(obj);
> if (ret)
> return ret;
>
> @@ -639,20 +619,11 @@ int i915_gem_object_prepare_write(struct drm_i915_gem_object *obj,
> I915_WAIT_ALL,
> MAX_SCHEDULE_TIMEOUT);
> if (ret)
> - goto err_unlock;
> -
> - ret = i915_gem_object_pin_pages(obj);
> - if (ret)
> - goto err_unlock;
> + return ret;
>
> if (obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE ||
> - !static_cpu_has(X86_FEATURE_CLFLUSH)) {
> - ret = i915_gem_object_set_to_cpu_domain(obj, true);
> - if (ret)
> - goto err_unpin;
> - else
> - goto out;
> - }
> + !static_cpu_has(X86_FEATURE_CLFLUSH))
> + return i915_gem_object_set_to_cpu_domain(obj, true);
>
> i915_gem_object_flush_write_domain(obj, ~I915_GEM_DOMAIN_CPU);
>
> @@ -672,15 +643,7 @@ int i915_gem_object_prepare_write(struct drm_i915_gem_object *obj,
> *needs_clflush |= CLFLUSH_BEFORE;
> }
>
> -out:
> i915_gem_object_invalidate_frontbuffer(obj, ORIGIN_CPU);
> obj->mm.dirty = true;
> - /* return with the pages pinned */
> return 0;
> -
> -err_unpin:
> - i915_gem_object_unpin_pages(obj);
> -err_unlock:
> - i915_gem_object_unlock(obj);
> - return ret;
> }
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> index db433f3f18ec..b07c508812ad 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> @@ -966,6 +966,13 @@ static int best_hole(struct drm_mm *mm, struct drm_mm_node *node,
> } while (1);
> }
>
> +static void eb_pin_vma_pages(struct i915_vma *vma, unsigned int count)
> +{
> + count = hweight32(count);
> + while (count--)
> + __i915_gem_object_pin_pages(vma->obj);
> +}
> +
> static int eb_reserve_vma(struct eb_vm_work *work, struct eb_bind_vma *bind)
> {
> struct drm_i915_gem_exec_object2 *entry = bind->ev->exec;
> @@ -1077,7 +1084,6 @@ static int eb_reserve_vma(struct eb_vm_work *work, struct eb_bind_vma *bind)
> if (unlikely(err))
> return err;
>
> - atomic_add(I915_VMA_PAGES_ACTIVE, &vma->pages_count);
> atomic_or(bind_flags, &vma->flags);
>
> if (i915_vma_is_ggtt(vma))
> @@ -1184,9 +1190,14 @@ static void __eb_bind_vma(struct eb_vm_work *work)
> GEM_BUG_ON(vma->vm != vm);
> GEM_BUG_ON(!i915_vma_is_active(vma));
>
> + if (!vma->pages)
> + vma->ops->set_pages(vma); /* plain assignment */
> +
> vma->ops->bind_vma(vm, &work->stash, vma,
> vma->obj->cache_level, bind->bind_flags);
>
> + eb_pin_vma_pages(vma, bind->bind_flags);
> +
> if (drm_mm_node_allocated(&bind->hole)) {
> mutex_lock(&vm->mutex);
> GEM_BUG_ON(bind->hole.mm != &vm->mm);
> @@ -1203,7 +1214,6 @@ static void __eb_bind_vma(struct eb_vm_work *work)
>
> put:
> GEM_BUG_ON(drm_mm_node_allocated(&bind->hole));
> - i915_vma_put_pages(vma);
> }
> work->count = 0;
> }
> @@ -1316,8 +1326,24 @@ static int eb_prepare_vma(struct eb_vm_work *work,
> if (err)
> return err;
> }
> + return 0;
> +}
> +
> +static int eb_lock_pt(struct i915_execbuffer *eb,
> + struct i915_vm_pt_stash *stash)
> +{
> + struct i915_page_table *pt;
> + int n, err;
>
> - return i915_vma_get_pages(vma);
> + for (n = 0; n < ARRAY_SIZE(stash->pt); n++) {
> + for (pt = stash->pt[n]; pt; pt = pt->stash) {
> + err = i915_acquire_ctx_lock(&eb->acquire, pt->base);
> + if (err)
> + return err;
> + }
> + }
> +
> + return 0;
> }
>
> static int wait_for_unbinds(struct i915_execbuffer *eb,
> @@ -1457,11 +1483,11 @@ static int eb_reserve_vm(struct i915_execbuffer *eb)
> }
> }
>
> - err = eb_acquire_mm(eb);
> + err = eb_lock_pt(eb, &work->stash);
> if (err)
> return eb_vm_work_cancel(work, err);
>
> - err = i915_vm_pin_pt_stash(work->vm, &work->stash);
> + err = eb_acquire_mm(eb);
> if (err)
> return eb_vm_work_cancel(work, err);
>
> @@ -2714,7 +2740,7 @@ static int eb_parse_pipeline(struct i915_execbuffer *eb,
> if (!pw)
> return -ENOMEM;
>
> - ptr = i915_gem_object_pin_map(shadow->obj, I915_MAP_FORCE_WB);
> + ptr = __i915_gem_object_pin_map_locked(shadow->obj, I915_MAP_FORCE_WB);
> if (IS_ERR(ptr)) {
> err = PTR_ERR(ptr);
> goto err_free;
> @@ -2722,7 +2748,7 @@ static int eb_parse_pipeline(struct i915_execbuffer *eb,
>
> if (!(batch->obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ) &&
> i915_has_memcpy_from_wc()) {
> - ptr = i915_gem_object_pin_map(batch->obj, I915_MAP_WC);
> + ptr = __i915_gem_object_pin_map_locked(batch->obj, I915_MAP_WC);
> if (IS_ERR(ptr)) {
> err = PTR_ERR(ptr);
> goto err_dst;
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
> index c8421fd9d2dc..799ad4e648aa 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
> @@ -53,8 +53,6 @@ void i915_gem_object_init(struct drm_i915_gem_object *obj,
> const struct drm_i915_gem_object_ops *ops,
> struct lock_class_key *key)
> {
> - __mutex_init(&obj->mm.lock, ops->name ?: "obj->mm.lock", key);
> -
> spin_lock_init(&obj->vma.lock);
> INIT_LIST_HEAD(&obj->vma.list);
>
> @@ -73,10 +71,6 @@ void i915_gem_object_init(struct drm_i915_gem_object *obj,
> obj->mm.madv = I915_MADV_WILLNEED;
> INIT_RADIX_TREE(&obj->mm.get_page.radix, GFP_KERNEL | __GFP_NOWARN);
> mutex_init(&obj->mm.get_page.lock);
> -
> - if (IS_ENABLED(CONFIG_LOCKDEP) && i915_gem_object_is_shrinkable(obj))
> - i915_gem_shrinker_taints_mutex(to_i915(obj->base.dev),
> - &obj->mm.lock);
> }
>
> /**
> @@ -229,10 +223,12 @@ static void __i915_gem_free_objects(struct drm_i915_private *i915,
>
> GEM_BUG_ON(!list_empty(&obj->lut_list));
>
> + i915_gem_object_lock(obj);
> atomic_set(&obj->mm.pages_pin_count, 0);
> __i915_gem_object_put_pages(obj);
> GEM_BUG_ON(i915_gem_object_has_pages(obj));
> bitmap_free(obj->bit_17);
> + i915_gem_object_unlock(obj);
>
> if (obj->base.import_attach)
> drm_prime_gem_destroy(&obj->base, NULL);
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
> index 6f60687b6be2..26f53321443b 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
> @@ -271,36 +271,9 @@ void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
> struct sg_table *pages,
> unsigned int sg_page_sizes);
>
> -int ____i915_gem_object_get_pages(struct drm_i915_gem_object *obj);
> -int __i915_gem_object_get_pages(struct drm_i915_gem_object *obj);
> -
> -enum i915_mm_subclass { /* lockdep subclass for obj->mm.lock/struct_mutex */
> - I915_MM_NORMAL = 0,
> - /*
> - * Only used by struct_mutex, when called "recursively" from
> - * direct-reclaim-esque. Safe because there is only every one
> - * struct_mutex in the entire system.
> - */
> - I915_MM_SHRINKER = 1,
> - /*
> - * Used for obj->mm.lock when allocating pages. Safe because the object
> - * isn't yet on any LRU, and therefore the shrinker can't deadlock on
> - * it. As soon as the object has pages, obj->mm.lock nests within
> - * fs_reclaim.
> - */
> - I915_MM_GET_PAGES = 1,
> -};
> -
> -static inline int __must_check
> -i915_gem_object_pin_pages(struct drm_i915_gem_object *obj)
> -{
> - might_lock_nested(&obj->mm.lock, I915_MM_GET_PAGES);
> +int __i915_gem_object_get_pages_locked(struct drm_i915_gem_object *obj);
>
> - if (atomic_inc_not_zero(&obj->mm.pages_pin_count))
> - return 0;
> -
> - return __i915_gem_object_get_pages(obj);
> -}
> +int i915_gem_object_pin_pages(struct drm_i915_gem_object *obj);
>
> static inline bool
> i915_gem_object_has_pages(struct drm_i915_gem_object *obj)
> @@ -368,6 +341,9 @@ enum i915_map_type {
> void *__must_check i915_gem_object_pin_map(struct drm_i915_gem_object *obj,
> enum i915_map_type type);
>
> +void *__i915_gem_object_pin_map_locked(struct drm_i915_gem_object *obj,
> + enum i915_map_type type);
> +
> static inline void *__i915_gem_object_mapping(struct drm_i915_gem_object *obj)
> {
> return page_mask_bits(obj->mm.mapping);
> @@ -417,8 +393,7 @@ int i915_gem_object_prepare_write(struct drm_i915_gem_object *obj,
> static inline void
> i915_gem_object_finish_access(struct drm_i915_gem_object *obj)
> {
> - i915_gem_object_unpin_pages(obj);
> - i915_gem_object_unlock(obj);
> + assert_object_held(obj);
> }
>
> static inline struct intel_engine_cs *
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
> index d0847d7896f9..ae3303ba272c 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
> @@ -187,7 +187,6 @@ struct drm_i915_gem_object {
> * Protects the pages and their use. Do not use directly, but
> * instead go through the pin/unpin interfaces.
> */
> - struct mutex lock;
> atomic_t pages_pin_count;
> atomic_t shrink_pin;
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
> index 7050519c87a4..76d53e535f42 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
> @@ -18,7 +18,7 @@ void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
> unsigned long supported = INTEL_INFO(i915)->page_sizes;
> int i;
>
> - lockdep_assert_held(&obj->mm.lock);
> + assert_object_held(obj);
>
> if (i915_gem_object_is_volatile(obj))
> obj->mm.madv = I915_MADV_DONTNEED;
> @@ -81,13 +81,17 @@ void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
> }
> }
>
> -int ____i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
> +int __i915_gem_object_get_pages_locked(struct drm_i915_gem_object *obj)
> {
> - struct drm_i915_private *i915 = to_i915(obj->base.dev);
> int err;
>
> + assert_object_held(obj);
> +
> + if (i915_gem_object_has_pages(obj))
> + return 0;
> +
> if (unlikely(obj->mm.madv != I915_MADV_WILLNEED)) {
> - drm_dbg(&i915->drm,
> + drm_dbg(obj->base.dev,
> "Attempting to obtain a purgeable object\n");
> return -EFAULT;
> }
> @@ -98,34 +102,33 @@ int ____i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
> return err;
> }
>
> -/* Ensure that the associated pages are gathered from the backing storage
> +/*
> + * Ensure that the associated pages are gathered from the backing storage
> * and pinned into our object. i915_gem_object_pin_pages() may be called
> * multiple times before they are released by a single call to
> * i915_gem_object_unpin_pages() - once the pages are no longer referenced
> * either as a result of memory pressure (reaping pages under the shrinker)
> * or as the object is itself released.
> */
> -int __i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
> +int i915_gem_object_pin_pages(struct drm_i915_gem_object *obj)
> {
> int err;
>
> - err = mutex_lock_interruptible_nested(&obj->mm.lock, I915_MM_GET_PAGES);
> + might_lock(&obj->base.resv->lock.base);
> +
> + if (atomic_inc_not_zero(&obj->mm.pages_pin_count))
> + return 0;
> +
> + err = i915_gem_object_lock_interruptible(obj);
> if (err)
> return err;
>
> - if (unlikely(!i915_gem_object_has_pages(obj))) {
> - GEM_BUG_ON(i915_gem_object_has_pinned_pages(obj));
> -
> - err = ____i915_gem_object_get_pages(obj);
> - if (err)
> - goto unlock;
> + err = __i915_gem_object_get_pages_locked(obj);
> + if (err == 0)
> + atomic_inc(&obj->mm.pages_pin_count);
>
> - smp_mb__before_atomic();
> - }
> - atomic_inc(&obj->mm.pages_pin_count);
> + i915_gem_object_unlock(obj);
>
> -unlock:
> - mutex_unlock(&obj->mm.lock);
> return err;
> }
>
> @@ -140,7 +143,7 @@ void i915_gem_object_truncate(struct drm_i915_gem_object *obj)
> /* Try to discard unwanted pages */
> void i915_gem_object_writeback(struct drm_i915_gem_object *obj)
> {
> - lockdep_assert_held(&obj->mm.lock);
> + assert_object_held(obj);
> GEM_BUG_ON(i915_gem_object_has_pages(obj));
>
> if (obj->ops->writeback)
> @@ -194,17 +197,15 @@ __i915_gem_object_unset_pages(struct drm_i915_gem_object *obj)
> int __i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
> {
> struct sg_table *pages;
> - int err;
> +
> + /* May be called by shrinker from within get_pages() (on another bo) */
> + assert_object_held(obj);
>
> if (i915_gem_object_has_pinned_pages(obj))
> return -EBUSY;
>
> - /* May be called by shrinker from within get_pages() (on another bo) */
> - mutex_lock(&obj->mm.lock);
> - if (unlikely(atomic_read(&obj->mm.pages_pin_count))) {
> - err = -EBUSY;
> - goto unlock;
> - }
> + if (unlikely(atomic_read(&obj->mm.pages_pin_count)))
> + return -EBUSY;
>
> i915_gem_object_release_mmap_offset(obj);
>
> @@ -227,11 +228,7 @@ int __i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
> if (!IS_ERR(pages))
> obj->ops->put_pages(obj, pages);
>
> - err = 0;
> -unlock:
> - mutex_unlock(&obj->mm.lock);
> -
> - return err;
> + return 0;
> }
>
> static inline pte_t iomap_pte(resource_size_t base,
> @@ -311,48 +308,28 @@ static void *i915_gem_object_map(struct drm_i915_gem_object *obj,
> return area->addr;
> }
>
> -/* get, pin, and map the pages of the object into kernel space */
> -void *i915_gem_object_pin_map(struct drm_i915_gem_object *obj,
> - enum i915_map_type type)
> +void *__i915_gem_object_pin_map_locked(struct drm_i915_gem_object *obj,
> + enum i915_map_type type)
> {
> enum i915_map_type has_type;
> unsigned int flags;
> bool pinned;
> void *ptr;
> - int err;
> +
> + assert_object_held(obj);
> + GEM_BUG_ON(!i915_gem_object_has_pages(obj));
>
> flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE | I915_GEM_OBJECT_HAS_IOMEM;
> if (!i915_gem_object_type_has(obj, flags))
> return ERR_PTR(-ENXIO);
>
> - err = mutex_lock_interruptible_nested(&obj->mm.lock, I915_MM_GET_PAGES);
> - if (err)
> - return ERR_PTR(err);
> -
> pinned = !(type & I915_MAP_OVERRIDE);
> type &= ~I915_MAP_OVERRIDE;
>
> - if (!atomic_inc_not_zero(&obj->mm.pages_pin_count)) {
> - if (unlikely(!i915_gem_object_has_pages(obj))) {
> - GEM_BUG_ON(i915_gem_object_has_pinned_pages(obj));
> -
> - err = ____i915_gem_object_get_pages(obj);
> - if (err)
> - goto err_unlock;
> -
> - smp_mb__before_atomic();
> - }
> - atomic_inc(&obj->mm.pages_pin_count);
> - pinned = false;
> - }
> - GEM_BUG_ON(!i915_gem_object_has_pages(obj));
> -
> ptr = page_unpack_bits(obj->mm.mapping, &has_type);
> if (ptr && has_type != type) {
> - if (pinned) {
> - err = -EBUSY;
> - goto err_unpin;
> - }
> + if (pinned)
> + return ERR_PTR(-EBUSY);
>
> unmap_object(obj, ptr);
>
> @@ -361,23 +338,38 @@ void *i915_gem_object_pin_map(struct drm_i915_gem_object *obj,
>
> if (!ptr) {
> ptr = i915_gem_object_map(obj, type);
> - if (!ptr) {
> - err = -ENOMEM;
> - goto err_unpin;
> - }
> + if (!ptr)
> + return ERR_PTR(-ENOMEM);
>
> obj->mm.mapping = page_pack_bits(ptr, type);
> }
>
> -out_unlock:
> - mutex_unlock(&obj->mm.lock);
> + __i915_gem_object_pin_pages(obj);
> return ptr;
> +}
> +
> +/* get, pin, and map the pages of the object into kernel space */
> +void *i915_gem_object_pin_map(struct drm_i915_gem_object *obj,
> + enum i915_map_type type)
> +{
> + void *ptr;
> + int err;
> +
> + err = i915_gem_object_lock_interruptible(obj);
> + if (err)
> + return ERR_PTR(err);
>
> -err_unpin:
> - atomic_dec(&obj->mm.pages_pin_count);
> -err_unlock:
> - ptr = ERR_PTR(err);
> - goto out_unlock;
> + err = __i915_gem_object_get_pages_locked(obj);
> + if (err) {
> + ptr = ERR_PTR(err);
> + goto out;
> + }
> +
> + ptr = __i915_gem_object_pin_map_locked(obj, type);
> +
> +out:
> + i915_gem_object_unlock(obj);
> + return ptr;
> }
>
> void __i915_gem_object_flush_map(struct drm_i915_gem_object *obj,
> @@ -434,7 +426,9 @@ i915_gem_object_get_sg(struct drm_i915_gem_object *obj,
>
> might_sleep();
> GEM_BUG_ON(n >= obj->base.size >> PAGE_SHIFT);
> - GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj));
> + GEM_BUG_ON(!i915_gem_object_has_pages(obj));
> + GEM_BUG_ON(!mutex_is_locked(&obj->base.resv->lock.base) &&
> + !i915_gem_object_has_pinned_pages(obj));
>
> /* As we iterate forward through the sg, we record each entry in a
> * radixtree for quick repeated (backwards) lookups. If we have seen
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_phys.c b/drivers/gpu/drm/i915/gem/i915_gem_phys.c
> index 28147aab47b9..f7f93b68b7c1 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_phys.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_phys.c
> @@ -165,7 +165,7 @@ int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, int align)
> if (err)
> return err;
>
> - mutex_lock_nested(&obj->mm.lock, I915_MM_GET_PAGES);
> + i915_gem_object_lock(obj);
>
> if (obj->mm.madv != I915_MADV_WILLNEED) {
> err = -EFAULT;
> @@ -186,7 +186,7 @@ int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, int align)
>
> obj->ops = &i915_gem_phys_ops;
>
> - err = ____i915_gem_object_get_pages(obj);
> + err = __i915_gem_object_get_pages_locked(obj);
> if (err)
> goto err_xfer;
>
> @@ -198,7 +198,7 @@ int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, int align)
>
> i915_gem_object_release_memory_region(obj);
>
> - mutex_unlock(&obj->mm.lock);
> + i915_gem_object_unlock(obj);
> return 0;
>
> err_xfer:
> @@ -209,7 +209,7 @@ int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj, int align)
> __i915_gem_object_set_pages(obj, pages, sg_page_sizes);
> }
> err_unlock:
> - mutex_unlock(&obj->mm.lock);
> + i915_gem_object_unlock(obj);
> return err;
> }
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
> index dc8f052a0ffe..4e928103a38f 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
> @@ -47,10 +47,7 @@ static bool unsafe_drop_pages(struct drm_i915_gem_object *obj,
> if (!(shrink & I915_SHRINK_BOUND))
> flags = I915_GEM_OBJECT_UNBIND_TEST;
>
> - if (i915_gem_object_unbind(obj, flags) == 0)
> - __i915_gem_object_put_pages(obj);
> -
> - return !i915_gem_object_has_pages(obj);
> + return i915_gem_object_unbind(obj, flags) == 0;
> }
>
> static void try_to_writeback(struct drm_i915_gem_object *obj,
> @@ -199,14 +196,14 @@ i915_gem_shrink(struct drm_i915_private *i915,
>
> spin_unlock_irqrestore(&i915->mm.obj_lock, flags);
>
> - if (unsafe_drop_pages(obj, shrink)) {
> - /* May arrive from get_pages on another bo */
> - mutex_lock(&obj->mm.lock);
> + if (unsafe_drop_pages(obj, shrink) &&
> + i915_gem_object_trylock(obj)) {
Why trylock? Because of the nesting? In that case, still use ww ctx if provided please
> + __i915_gem_object_put_pages(obj);
> if (!i915_gem_object_has_pages(obj)) {
> try_to_writeback(obj, shrink);
> count += obj->base.size >> PAGE_SHIFT;
> }
> - mutex_unlock(&obj->mm.lock);
> + i915_gem_object_unlock(obj);
> }
>
> scanned += obj->base.size >> PAGE_SHIFT;
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_tiling.c b/drivers/gpu/drm/i915/gem/i915_gem_tiling.c
> index ff72ee2fd9cd..ac12e1c20e66 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_tiling.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_tiling.c
> @@ -265,7 +265,6 @@ i915_gem_object_set_tiling(struct drm_i915_gem_object *obj,
> * pages to prevent them being swapped out and causing corruption
> * due to the change in swizzling.
> */
> - mutex_lock(&obj->mm.lock);
> if (i915_gem_object_has_pages(obj) &&
> obj->mm.madv == I915_MADV_WILLNEED &&
> i915->quirks & QUIRK_PIN_SWIZZLED_PAGES) {
> @@ -280,7 +279,6 @@ i915_gem_object_set_tiling(struct drm_i915_gem_object *obj,
> obj->mm.quirked = true;
> }
> }
> - mutex_unlock(&obj->mm.lock);
>
> spin_lock(&obj->vma.lock);
> for_each_ggtt_vma(vma, obj) {
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
> index e946032b13e4..80907c00c6fd 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
> @@ -129,8 +129,15 @@ userptr_mn_invalidate_range_start(struct mmu_notifier *_mn,
> ret = i915_gem_object_unbind(obj,
> I915_GEM_OBJECT_UNBIND_ACTIVE |
> I915_GEM_OBJECT_UNBIND_BARRIER);
> - if (ret == 0)
> - ret = __i915_gem_object_put_pages(obj);
> + if (ret == 0) {
> + /* ww_mutex and mmu_notifier is fs_reclaim tainted */
> + if (i915_gem_object_trylock(obj)) {
> + ret = __i915_gem_object_put_pages(obj);
> + i915_gem_object_unlock(obj);
> + } else {
> + ret = -EAGAIN;
> + }
> + }
I'm not sure upstream will agree with this kind of API:
1. It will deadlock when RT tasks are used.
2. You start throwing -EAGAIN because you don't have the correct ordering of locking, this needs fixing first.
> i915_gem_object_put(obj);
> if (ret)
> return ret;
> @@ -485,7 +492,7 @@ __i915_gem_userptr_get_pages_worker(struct work_struct *_work)
> }
> }
>
> - mutex_lock_nested(&obj->mm.lock, I915_MM_GET_PAGES);
> + i915_gem_object_lock(obj);
> if (obj->userptr.work == &work->work) {
> struct sg_table *pages = ERR_PTR(ret);
>
> @@ -502,7 +509,7 @@ __i915_gem_userptr_get_pages_worker(struct work_struct *_work)
> if (IS_ERR(pages))
> __i915_gem_userptr_set_active(obj, false);
> }
> - mutex_unlock(&obj->mm.lock);
> + i915_gem_object_unlock(obj);
>
> unpin_user_pages(pvec, pinned);
> kvfree(pvec);
> diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
> index e2f3d014acb2..eb12d444d2cc 100644
> --- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
> +++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
> @@ -452,6 +452,15 @@ static int igt_mock_exhaust_device_supported_pages(void *arg)
> return err;
> }
>
> +static void close_object(struct drm_i915_gem_object *obj)
> +{
> + i915_gem_object_lock(obj);
> + __i915_gem_object_put_pages(obj);
> + i915_gem_object_unlock(obj);
> +
> + i915_gem_object_put(obj);
> +}
> +
> static int igt_mock_memory_region_huge_pages(void *arg)
> {
> const unsigned int flags[] = { 0, I915_BO_ALLOC_CONTIGUOUS };
> @@ -514,8 +523,7 @@ static int igt_mock_memory_region_huge_pages(void *arg)
> }
>
> i915_vma_unpin(vma);
> - __i915_gem_object_put_pages(obj);
> - i915_gem_object_put(obj);
> + close_object(obj);
> }
> }
>
> @@ -633,8 +641,7 @@ static int igt_mock_ppgtt_misaligned_dma(void *arg)
> }
>
> i915_gem_object_unpin_pages(obj);
> - __i915_gem_object_put_pages(obj);
> - i915_gem_object_put(obj);
> + close_object(obj);
> }
>
> return 0;
> @@ -655,8 +662,7 @@ static void close_object_list(struct list_head *objects,
> list_for_each_entry_safe(obj, on, objects, st_link) {
> list_del(&obj->st_link);
> i915_gem_object_unpin_pages(obj);
> - __i915_gem_object_put_pages(obj);
> - i915_gem_object_put(obj);
> + close_object(obj);
> }
> }
>
> @@ -923,8 +929,7 @@ static int igt_mock_ppgtt_64K(void *arg)
>
> i915_vma_unpin(vma);
> i915_gem_object_unpin_pages(obj);
> - __i915_gem_object_put_pages(obj);
> - i915_gem_object_put(obj);
> + close_object(obj);
> }
> }
>
> @@ -964,9 +969,10 @@ __cpu_check_shmem(struct drm_i915_gem_object *obj, u32 dword, u32 val)
> unsigned long n;
> int err;
>
> + i915_gem_object_lock(obj);
> err = i915_gem_object_prepare_read(obj, &needs_flush);
> if (err)
> - return err;
> + goto unlock;
>
> for (n = 0; n < obj->base.size >> PAGE_SHIFT; ++n) {
> u32 *ptr = kmap_atomic(i915_gem_object_get_page(obj, n));
> @@ -986,7 +992,8 @@ __cpu_check_shmem(struct drm_i915_gem_object *obj, u32 dword, u32 val)
> }
>
> i915_gem_object_finish_access(obj);
> -
> +unlock:
> + i915_gem_object_unlock(obj);
> return err;
> }
>
> @@ -1304,7 +1311,9 @@ static int igt_ppgtt_smoke_huge(void *arg)
> }
> out_unpin:
> i915_gem_object_unpin_pages(obj);
> + i915_gem_object_lock(obj);
> __i915_gem_object_put_pages(obj);
> + i915_gem_object_unlock(obj);
> out_put:
> i915_gem_object_put(obj);
>
> @@ -1392,8 +1401,7 @@ static int igt_ppgtt_sanity_check(void *arg)
> err = igt_write_huge(ctx, obj);
>
> i915_gem_object_unpin_pages(obj);
> - __i915_gem_object_put_pages(obj);
> - i915_gem_object_put(obj);
> + close_object(obj);
>
> if (err) {
> pr_err("%s write-huge failed with size=%u pages=%u i=%d, j=%d\n",
> diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
> index 87d7d8aa080f..b8dd6fabe70a 100644
> --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
> +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
> @@ -27,9 +27,10 @@ static int cpu_set(struct context *ctx, unsigned long offset, u32 v)
> u32 *cpu;
> int err;
>
> + i915_gem_object_lock(ctx->obj);
> err = i915_gem_object_prepare_write(ctx->obj, &needs_clflush);
> if (err)
> - return err;
> + goto unlock;
>
> page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
> map = kmap_atomic(page);
> @@ -46,7 +47,9 @@ static int cpu_set(struct context *ctx, unsigned long offset, u32 v)
> kunmap_atomic(map);
> i915_gem_object_finish_access(ctx->obj);
>
> - return 0;
> +unlock:
> + i915_gem_object_unlock(ctx->obj);
> + return err;
> }
>
> static int cpu_get(struct context *ctx, unsigned long offset, u32 *v)
> @@ -57,9 +60,10 @@ static int cpu_get(struct context *ctx, unsigned long offset, u32 *v)
> u32 *cpu;
> int err;
>
> + i915_gem_object_lock(ctx->obj);
> err = i915_gem_object_prepare_read(ctx->obj, &needs_clflush);
> if (err)
> - return err;
> + goto unlock;
>
> page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
> map = kmap_atomic(page);
> @@ -73,7 +77,9 @@ static int cpu_get(struct context *ctx, unsigned long offset, u32 *v)
> kunmap_atomic(map);
> i915_gem_object_finish_access(ctx->obj);
>
> - return 0;
> +unlock:
> + i915_gem_object_unlock(ctx->obj);
> + return err;
> }
>
> static int gtt_set(struct context *ctx, unsigned long offset, u32 v)
> diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> index d176b015353f..f2a307b4146e 100644
> --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> @@ -461,9 +461,10 @@ static int cpu_fill(struct drm_i915_gem_object *obj, u32 value)
> unsigned int n, m, need_flush;
> int err;
>
> + i915_gem_object_lock(obj);
> err = i915_gem_object_prepare_write(obj, &need_flush);
> if (err)
> - return err;
> + goto unlock;
>
> for (n = 0; n < real_page_count(obj); n++) {
> u32 *map;
> @@ -479,6 +480,8 @@ static int cpu_fill(struct drm_i915_gem_object *obj, u32 value)
> i915_gem_object_finish_access(obj);
> obj->read_domains = I915_GEM_DOMAIN_GTT | I915_GEM_DOMAIN_CPU;
> obj->write_domain = 0;
> +unlock:
> + i915_gem_object_unlock(obj);
> return 0;
> }
>
> @@ -488,9 +491,10 @@ static noinline int cpu_check(struct drm_i915_gem_object *obj,
> unsigned int n, m, needs_flush;
> int err;
>
> + i915_gem_object_lock(obj);
> err = i915_gem_object_prepare_read(obj, &needs_flush);
> if (err)
> - return err;
> + goto unlock;
>
> for (n = 0; n < real_page_count(obj); n++) {
> u32 *map;
> @@ -527,6 +531,8 @@ static noinline int cpu_check(struct drm_i915_gem_object *obj,
> }
>
> i915_gem_object_finish_access(obj);
> +unlock:
> + i915_gem_object_unlock(obj);
> return err;
> }
>
> diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
> index 9c7402ce5bf9..11f734fea3ab 100644
> --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
> +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
> @@ -1297,7 +1297,9 @@ static int __igt_mmap_revoke(struct drm_i915_private *i915,
> }
>
> if (type != I915_MMAP_TYPE_GTT) {
> + i915_gem_object_lock(obj);
> __i915_gem_object_put_pages(obj);
> + i915_gem_object_unlock(obj);
> if (i915_gem_object_has_pages(obj)) {
> pr_err("Failed to put-pages object!\n");
> err = -EINVAL;
> diff --git a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
> index 71baf2f8bdf3..3eab2cc751bc 100644
> --- a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
> +++ b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
> @@ -351,7 +351,6 @@ static struct i915_vma *pd_vma_create(struct gen6_ppgtt *ppgtt, int size)
> i915_active_init(&vma->active, NULL, NULL);
>
> kref_init(&vma->ref);
> - mutex_init(&vma->pages_mutex);
> vma->vm = i915_vm_get(&ggtt->vm);
> vma->ops = &pd_vma_ops;
> vma->private = ppgtt;
> @@ -439,7 +438,6 @@ struct i915_ppgtt *gen6_ppgtt_create(struct intel_gt *gt)
> ppgtt->base.vm.pd_shift = 22;
> ppgtt->base.vm.top = 1;
>
> - ppgtt->base.vm.bind_async_flags = I915_VMA_LOCAL_BIND;
> ppgtt->base.vm.allocate_va_range = gen6_alloc_va_range;
> ppgtt->base.vm.clear_range = gen6_ppgtt_clear_range;
> ppgtt->base.vm.insert_entries = gen6_ppgtt_insert_entries;
> diff --git a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
> index e3afd250cd7f..203aa1f9aec7 100644
> --- a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
> +++ b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
> @@ -720,7 +720,6 @@ struct i915_ppgtt *gen8_ppgtt_create(struct intel_gt *gt)
> goto err_free_pd;
> }
>
> - ppgtt->vm.bind_async_flags = I915_VMA_LOCAL_BIND;
> ppgtt->vm.insert_entries = gen8_ppgtt_insert;
> ppgtt->vm.allocate_va_range = gen8_ppgtt_alloc;
> ppgtt->vm.clear_range = gen8_ppgtt_clear;
> diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c
> index 33a3f627ddb1..59a4a3ab6bfd 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
> @@ -628,7 +628,6 @@ static int init_aliasing_ppgtt(struct i915_ggtt *ggtt)
> ppgtt->vm.allocate_va_range(&ppgtt->vm, &stash, 0, ggtt->vm.total);
>
> ggtt->alias = ppgtt;
> - ggtt->vm.bind_async_flags |= ppgtt->vm.bind_async_flags;
>
> GEM_BUG_ON(ggtt->vm.vma_ops.bind_vma != ggtt_bind_vma);
> ggtt->vm.vma_ops.bind_vma = aliasing_gtt_bind_vma;
> @@ -862,8 +861,6 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt)
> IS_CHERRYVIEW(i915) /* fails with concurrent use/update */) {
> ggtt->vm.insert_entries = bxt_vtd_ggtt_insert_entries__BKL;
> ggtt->vm.insert_page = bxt_vtd_ggtt_insert_page__BKL;
> - ggtt->vm.bind_async_flags =
> - I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND;
> }
>
> ggtt->invalidate = gen8_ggtt_invalidate;
> @@ -1429,7 +1426,7 @@ i915_get_ggtt_vma_pages(struct i915_vma *vma)
> * 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));
> + GEM_BUG_ON(!i915_gem_object_has_pages(vma->obj));
>
> switch (vma->ggtt_view.type) {
> default:
> diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h
> index 496f8236ca09..1bb447ef824b 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gtt.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
> @@ -226,8 +226,6 @@ struct i915_address_space {
> u64 total; /* size addr space maps (ex. 2GB for ggtt) */
> u64 reserved; /* size addr space reserved */
>
> - unsigned int bind_async_flags;
> -
> /*
> * Each active user context has its own address space (in full-ppgtt).
> * Since the vm may be shared between multiple contexts, we count how
> diff --git a/drivers/gpu/drm/i915/gt/intel_ppgtt.c b/drivers/gpu/drm/i915/gt/intel_ppgtt.c
> index 1f80d79a6588..68dd3f8b79d0 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ppgtt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ppgtt.c
> @@ -271,6 +271,7 @@ void i915_vm_free_pt_stash(struct i915_address_space *vm,
> int ppgtt_set_pages(struct i915_vma *vma)
> {
> GEM_BUG_ON(vma->pages);
> + GEM_BUG_ON(IS_ERR_OR_NULL(vma->obj->mm.pages));
>
> vma->pages = vma->obj->mm.pages;
> vma->page_sizes = vma->obj->mm.page_sizes;
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index e998f25f30a3..0fbe438c4523 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -335,12 +335,16 @@ i915_gem_shmem_pread(struct drm_i915_gem_object *obj,
> u64 remain;
> int ret;
>
> + i915_gem_object_lock(obj);
> ret = i915_gem_object_prepare_read(obj, &needs_clflush);
> - if (ret)
> + if (ret) {
> + i915_gem_object_unlock(obj);
> return ret;
> + }
>
> fence = i915_gem_object_lock_fence(obj);
> i915_gem_object_finish_access(obj);
> + i915_gem_object_unlock(obj);
> if (!fence)
> return -ENOMEM;
>
> @@ -734,12 +738,16 @@ i915_gem_shmem_pwrite(struct drm_i915_gem_object *obj,
> u64 remain;
> int ret;
>
> + i915_gem_object_lock(obj);
> ret = i915_gem_object_prepare_write(obj, &needs_clflush);
> - if (ret)
> + if (ret) {
> + i915_gem_object_unlock(obj);
> return ret;
> + }
>
> fence = i915_gem_object_lock_fence(obj);
> i915_gem_object_finish_access(obj);
> + i915_gem_object_unlock(obj);
> if (!fence)
> return -ENOMEM;
>
> @@ -1063,7 +1071,7 @@ i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
> if (!obj)
> return -ENOENT;
>
> - err = mutex_lock_interruptible(&obj->mm.lock);
> + err = i915_gem_object_lock_interruptible(obj);
> if (err)
> goto out;
>
> @@ -1109,7 +1117,7 @@ i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
> i915_gem_object_truncate(obj);
>
> args->retained = obj->mm.madv != __I915_MADV_PURGED;
> - mutex_unlock(&obj->mm.lock);
> + i915_gem_object_unlock(obj);
>
> out:
> i915_gem_object_put(obj);
> diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
> index 7278cc7c40b9..633f335ce892 100644
> --- a/drivers/gpu/drm/i915/i915_vma.c
> +++ b/drivers/gpu/drm/i915/i915_vma.c
> @@ -116,7 +116,6 @@ vma_create(struct drm_i915_gem_object *obj,
> return ERR_PTR(-ENOMEM);
>
> kref_init(&vma->ref);
> - mutex_init(&vma->pages_mutex);
> vma->vm = i915_vm_get(vm);
> vma->ops = &vm->vma_ops;
> vma->obj = obj;
> @@ -295,16 +294,31 @@ struct i915_vma_work {
> struct i915_address_space *vm;
> struct i915_vm_pt_stash stash;
> struct i915_vma *vma;
> - struct drm_i915_gem_object *pinned;
> struct i915_sw_dma_fence_cb cb;
> enum i915_cache_level cache_level;
> unsigned int flags;
> };
>
> +static void pin_pages(struct i915_vma *vma, unsigned int bind)
> +{
> + bind = hweight32(bind & I915_VMA_BIND_MASK);
> + while (bind--)
> + __i915_gem_object_pin_pages(vma->obj);
> +}
> +
> static int __vma_bind(struct dma_fence_work *work)
> {
> struct i915_vma_work *vw = container_of(work, typeof(*vw), base);
> struct i915_vma *vma = vw->vma;
> + int err;
> +
> + if (!vma->pages) {
> + err = vma->ops->set_pages(vma);
> + if (err) {
> + atomic_or(I915_VMA_ERROR, &vma->flags);
> + return err;
> + }
> + }
>
> vma->ops->bind_vma(vw->vm, &vw->stash,
> vma, vw->cache_level, vw->flags);
> @@ -315,8 +329,8 @@ 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_unpin_pages(vw->pinned);
> + if (work->dma.error && vw->flags)
> + atomic_or(I915_VMA_ERROR, &vw->vma->flags);
>
> i915_vm_free_pt_stash(vw->vm, &vw->stash);
> i915_vm_put(vw->vm);
> @@ -389,6 +403,7 @@ int i915_vma_bind(struct i915_vma *vma,
> u32 flags,
> struct i915_vma_work *work)
> {
> + struct dma_fence *prev;
> u32 bind_flags;
> u32 vma_flags;
>
> @@ -413,41 +428,39 @@ int i915_vma_bind(struct i915_vma *vma,
> if (bind_flags == 0)
> return 0;
>
> - GEM_BUG_ON(!vma->pages);
> -
> trace_i915_vma_bind(vma, bind_flags);
> - if (work && bind_flags & vma->vm->bind_async_flags) {
> - struct dma_fence *prev;
>
> - work->vma = vma;
> - work->cache_level = cache_level;
> - work->flags = bind_flags;
> + work->vma = vma;
> + work->cache_level = cache_level;
> + work->flags = bind_flags;
> + work->base.dma.error = 0; /* enable the queue_work() */
>
> - /*
> - * 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() */
> + /*
> + * 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);
> + }
>
> - if (vma->obj) {
> - __i915_gem_object_pin_pages(vma->obj);
> - work->pinned = vma->obj;
> + if (vma->obj) {
> + if (IS_ERR(vma->obj->mm.pages)) {
> + i915_sw_fence_set_error_once(&work->base.chain,
> + PTR_ERR(vma->obj->mm.pages));
> + atomic_or(I915_VMA_ERROR, &vma->flags);
> + bind_flags = 0;
> }
> - } else {
> - vma->ops->bind_vma(vma->vm, NULL, vma, cache_level, bind_flags);
> +
> + pin_pages(vma, bind_flags);
> }
>
> atomic_or(bind_flags, &vma->flags);
> @@ -690,6 +703,9 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
> if (ret)
> return ret;
> } else {
> + const unsigned long page_sizes =
> + INTEL_INFO(vma->vm->i915)->page_sizes;
> +
> /*
> * We only support huge gtt pages through the 48b PPGTT,
> * however we also don't want to force any alignment for
> @@ -699,7 +715,7 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
> * forseeable future. See also i915_ggtt_offset().
> */
> if (upper_32_bits(end - 1) &&
> - vma->page_sizes.sg > I915_GTT_PAGE_SIZE) {
> + page_sizes > 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
> @@ -707,7 +723,7 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
> * objects to 2M.
> */
> u64 page_alignment =
> - rounddown_pow_of_two(vma->page_sizes.sg |
> + rounddown_pow_of_two(page_sizes |
> I915_GTT_PAGE_SIZE_2M);
>
> /*
> @@ -719,7 +735,7 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
>
> alignment = max(alignment, page_alignment);
>
> - if (vma->page_sizes.sg & I915_GTT_PAGE_SIZE_64K)
> + if (page_sizes & I915_GTT_PAGE_SIZE_64K)
> size = round_up(size, I915_GTT_PAGE_SIZE_2M);
> }
>
> @@ -796,74 +812,6 @@ bool i915_vma_pin_inplace(struct i915_vma *vma, unsigned int flags)
> return pinned;
> }
>
> -int i915_vma_get_pages(struct i915_vma *vma)
> -{
> - int err = 0;
> -
> - if (atomic_add_unless(&vma->pages_count, 1, 0))
> - return 0;
> -
> - /* Allocations ahoy! */
> - if (mutex_lock_interruptible(&vma->pages_mutex))
> - return -EINTR;
> -
> - if (!atomic_read(&vma->pages_count)) {
> - if (vma->obj) {
> - err = i915_gem_object_pin_pages(vma->obj);
> - if (err)
> - goto unlock;
> - }
> -
> - err = vma->ops->set_pages(vma);
> - if (err) {
> - if (vma->obj)
> - i915_gem_object_unpin_pages(vma->obj);
> - goto unlock;
> - }
> - }
> - atomic_inc(&vma->pages_count);
> -
> -unlock:
> - mutex_unlock(&vma->pages_mutex);
> -
> - return err;
> -}
> -
> -static void __vma_put_pages(struct i915_vma *vma, unsigned int count)
> -{
> - /* We allocate under vma_get_pages, so beware the shrinker */
> - mutex_lock_nested(&vma->pages_mutex, SINGLE_DEPTH_NESTING);
> - GEM_BUG_ON(atomic_read(&vma->pages_count) < count);
> - if (atomic_sub_return(count, &vma->pages_count) == 0) {
> - vma->ops->clear_pages(vma);
> - GEM_BUG_ON(vma->pages);
> - if (vma->obj)
> - i915_gem_object_unpin_pages(vma->obj);
> - }
> - mutex_unlock(&vma->pages_mutex);
> -}
> -
> -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;
> - if (count)
> - __vma_put_pages(vma, count | count << I915_VMA_PAGES_BIAS);
> -}
> -
> static int __wait_for_unbind(struct i915_vma *vma, unsigned int flags)
> {
> return __i915_vma_wait_excl(vma, false, flags);
> @@ -885,9 +833,11 @@ int i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
> if (i915_vma_pin_inplace(vma, flags & I915_VMA_BIND_MASK))
> return 0;
>
> - err = i915_vma_get_pages(vma);
> - if (err)
> - return err;
> + if (vma->obj) {
> + err = i915_gem_object_pin_pages(vma->obj);
> + if (err)
> + return err;
> + }
>
> if (flags & PIN_GLOBAL)
> wakeref = intel_runtime_pm_get(&vma->vm->i915->runtime_pm);
> @@ -896,26 +846,21 @@ int i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
> if (err)
> goto err_rpm;
>
> - if (flags & vma->vm->bind_async_flags) {
> - work = i915_vma_work();
> - if (!work) {
> - err = -ENOMEM;
> - goto err_rpm;
> - }
> + work = i915_vma_work();
> + if (!work) {
> + err = -ENOMEM;
> + goto err_rpm;
> + }
>
> - work->vm = i915_vm_get(vma->vm);
> + work->vm = i915_vm_get(vma->vm);
>
> - /* Allocate enough page directories to used PTE */
> - if (vma->vm->allocate_va_range) {
> - i915_vm_alloc_pt_stash(vma->vm,
> - &work->stash,
> - vma->size);
> + /* Allocate enough page directories to used PTE */
> + if (vma->vm->allocate_va_range) {
> + i915_vm_alloc_pt_stash(vma->vm, &work->stash, vma->size);
>
> - err = i915_vm_pin_pt_stash(vma->vm,
> - &work->stash);
> - if (err)
> - goto err_fence;
> - }
> + err = i915_vm_pin_pt_stash(vma->vm, &work->stash);
> + if (err)
> + goto err_fence;
> }
>
> /*
> @@ -980,16 +925,12 @@ int i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
> __i915_vma_set_map_and_fenceable(vma);
> }
>
> - GEM_BUG_ON(!vma->pages);
> err = i915_vma_bind(vma,
> vma->obj ? vma->obj->cache_level : 0,
> flags, work);
> 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);
> GEM_BUG_ON(!i915_vma_is_active(vma));
>
> @@ -1008,12 +949,12 @@ int i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
> err_unlock:
> mutex_unlock(&vma->vm->mutex);
> err_fence:
> - if (work)
> - dma_fence_work_commit_imm(&work->base);
> + dma_fence_work_commit_imm(&work->base);
> err_rpm:
> if (wakeref)
> intel_runtime_pm_put(&vma->vm->i915->runtime_pm, wakeref);
> - i915_vma_put_pages(vma);
> + if (vma->obj)
> + i915_gem_object_unpin_pages(vma->obj);
> return err;
> }
>
> @@ -1274,6 +1215,8 @@ int i915_vma_move_to_active(struct i915_vma *vma,
>
> void __i915_vma_evict(struct i915_vma *vma)
> {
> + int count;
> +
> GEM_BUG_ON(i915_vma_is_pinned(vma));
>
> if (i915_vma_is_map_and_fenceable(vma)) {
> @@ -1308,11 +1251,19 @@ void __i915_vma_evict(struct i915_vma *vma)
> trace_i915_vma_unbind(vma);
> vma->ops->unbind_vma(vma->vm, vma);
> }
> + count = hweight32(atomic_read(&vma->flags) & I915_VMA_BIND_MASK);
> atomic_and(~(I915_VMA_BIND_MASK | I915_VMA_ERROR | I915_VMA_GGTT_WRITE),
> &vma->flags);
>
> i915_vma_detach(vma);
> - vma_unbind_pages(vma);
> +
> + if (vma->pages)
> + vma->ops->clear_pages(vma);
> +
> + if (vma->obj) {
> + while (count--)
> + __i915_gem_object_unpin_pages(vma->obj);
> + }
> }
>
> int __i915_vma_unbind(struct i915_vma *vma)
> diff --git a/drivers/gpu/drm/i915/i915_vma_types.h b/drivers/gpu/drm/i915/i915_vma_types.h
> index 9e9082dc8f4b..02c1640bb034 100644
> --- a/drivers/gpu/drm/i915/i915_vma_types.h
> +++ b/drivers/gpu/drm/i915/i915_vma_types.h
> @@ -251,11 +251,6 @@ struct i915_vma {
>
> struct i915_active active;
>
> -#define I915_VMA_PAGES_BIAS 24
> -#define I915_VMA_PAGES_ACTIVE (BIT(24) | 1)
> - atomic_t pages_count; /* number of active binds to the pages */
> - struct mutex pages_mutex; /* protect acquire/release of backing pages */
> -
> /**
> * Support different GGTT views into the same object.
> * This means there can be multiple VMA mappings per object and per VM.
> @@ -279,4 +274,3 @@ struct i915_vma {
> };
>
> #endif
> -
> diff --git a/drivers/gpu/drm/i915/mm/i915_acquire_ctx.c b/drivers/gpu/drm/i915/mm/i915_acquire_ctx.c
> index d1c3b958c15d..02b653328b9d 100644
> --- a/drivers/gpu/drm/i915/mm/i915_acquire_ctx.c
> +++ b/drivers/gpu/drm/i915/mm/i915_acquire_ctx.c
> @@ -89,8 +89,18 @@ int i915_acquire_ctx_lock(struct i915_acquire_ctx *ctx,
> return err;
> }
>
> -int i915_acquire_mm(struct i915_acquire_ctx *acquire)
> +int i915_acquire_mm(struct i915_acquire_ctx *ctx)
> {
> + struct i915_acquire *lnk;
> + int err;
> +
> + for (lnk = ctx->locked; lnk; lnk = lnk->next) {
> + err = __i915_gem_object_get_pages_locked(lnk->obj);
> + if (err)
> + return err;
> + }
> +
> + i915_acquire_ctx_done(ctx);
> return 0;
> }
>
> diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
> index af8205a2bd8f..e5e6973eb6ea 100644
> --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
> @@ -1245,9 +1245,9 @@ static void track_vma_bind(struct i915_vma *vma)
> __i915_gem_object_pin_pages(obj);
>
> GEM_BUG_ON(vma->pages);
> - atomic_set(&vma->pages_count, I915_VMA_PAGES_ACTIVE);
> - __i915_gem_object_pin_pages(obj);
> vma->pages = obj->mm.pages;
> + __i915_gem_object_pin_pages(obj);
> + atomic_or(I915_VMA_GLOBAL_BIND, &vma->flags);
>
> mutex_lock(&vma->vm->mutex);
> list_add_tail(&vma->vm_link, &vma->vm->bound_list);
> diff --git a/drivers/gpu/drm/i915/selftests/intel_memory_region.c b/drivers/gpu/drm/i915/selftests/intel_memory_region.c
> index 6e80d99048e4..8d9fdf591514 100644
> --- a/drivers/gpu/drm/i915/selftests/intel_memory_region.c
> +++ b/drivers/gpu/drm/i915/selftests/intel_memory_region.c
> @@ -24,6 +24,15 @@
> #include "selftests/igt_flush_test.h"
> #include "selftests/i915_random.h"
>
> +static void close_object(struct drm_i915_gem_object *obj)
> +{
> + i915_gem_object_lock(obj);
> + __i915_gem_object_put_pages(obj);
> + i915_gem_object_unlock(obj);
> +
> + i915_gem_object_put(obj);
> +}
> +
> static void close_objects(struct intel_memory_region *mem,
> struct list_head *objects)
> {
> @@ -33,10 +42,9 @@ static void close_objects(struct intel_memory_region *mem,
> list_for_each_entry_safe(obj, on, objects, st_link) {
> if (i915_gem_object_has_pinned_pages(obj))
> i915_gem_object_unpin_pages(obj);
> - /* No polluting the memory region between tests */
> - __i915_gem_object_put_pages(obj);
> list_del(&obj->st_link);
> - i915_gem_object_put(obj);
> + /* No polluting the memory region between tests */
> + close_object(obj);
> }
>
> cond_resched();
> @@ -124,9 +132,8 @@ igt_object_create(struct intel_memory_region *mem,
> static void igt_object_release(struct drm_i915_gem_object *obj)
> {
> i915_gem_object_unpin_pages(obj);
> - __i915_gem_object_put_pages(obj);
> list_del(&obj->st_link);
> - i915_gem_object_put(obj);
> + close_object(obj);
> }
>
> static int igt_mock_contiguous(void *arg)
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