On Mon, Aug 26, 2019 at 2:21 PM Abdiel Janulgue
<abdiel.janulgue@xxxxxxxxxxxxxxx> wrote:
>
> Have i915 replace the core drm_gem_mmap implementation to overcome its
> limitation in having only a single mmap offset node per gem object.
> The change allows us to have multiple mmap offsets per object. This
> enables a mmapping instance to use unique fault-handlers per user vma.
>
> This enables us to store extra data within vma->vm_private_data and assign
> the pagefault ops for each mmap instance allowing objects to use multiple
> fault handlers depending on its backing storage.
>
> Signed-off-by: Abdiel Janulgue <abdiel.janulgue@xxxxxxxxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gem/i915_gem_mman.c | 193 ++++++++++++++++--
> drivers/gpu/drm/i915/gem/i915_gem_object.c | 19 ++
> drivers/gpu/drm/i915/gem/i915_gem_object.h | 7 +-
> .../gpu/drm/i915/gem/i915_gem_object_types.h | 18 ++
> .../drm/i915/gem/selftests/i915_gem_mman.c | 12 +-
> drivers/gpu/drm/i915/gt/intel_reset.c | 11 +-
> drivers/gpu/drm/i915/i915_drv.c | 9 +-
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> drivers/gpu/drm/i915/i915_vma.c | 20 +-
> 9 files changed, 254 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
> index 595539a09e38..fb7e39f115d7 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
> @@ -218,7 +218,8 @@ vm_fault_t i915_gem_fault(struct vm_fault *vmf)
> {
> #define MIN_CHUNK_PAGES (SZ_1M >> PAGE_SHIFT)
> struct vm_area_struct *area = vmf->vma;
> - struct drm_i915_gem_object *obj = to_intel_bo(area->vm_private_data);
> + struct i915_mmap_offset *priv = area->vm_private_data;
> + struct drm_i915_gem_object *obj = priv->obj;
> struct drm_device *dev = obj->base.dev;
> struct drm_i915_private *i915 = to_i915(dev);
> struct intel_runtime_pm *rpm = &i915->runtime_pm;
> @@ -372,13 +373,20 @@ vm_fault_t i915_gem_fault(struct vm_fault *vmf)
> void __i915_gem_object_release_mmap(struct drm_i915_gem_object *obj)
> {
> struct i915_vma *vma;
> + struct i915_mmap_offset *mmo;
>
> GEM_BUG_ON(!obj->userfault_count);
>
> obj->userfault_count = 0;
> list_del(&obj->userfault_link);
> - drm_vma_node_unmap(&obj->base.vma_node,
> - obj->base.dev->anon_inode->i_mapping);
> +
> + mutex_lock(&obj->mmo_lock);
> + list_for_each_entry(mmo, &obj->mmap_offsets, offset) {
> + if (mmo->mmap_type == I915_MMAP_TYPE_GTT)
> + drm_vma_node_unmap(&mmo->vma_node,
> + obj->base.dev->anon_inode->i_mapping);
> + }
> + mutex_unlock(&obj->mmo_lock);
>
> for_each_ggtt_vma(vma, obj)
> i915_vma_unset_userfault(vma);
> @@ -433,14 +441,33 @@ void i915_gem_object_release_mmap(struct drm_i915_gem_object *obj)
> intel_runtime_pm_put(&i915->runtime_pm, wakeref);
> }
>
> -static int create_mmap_offset(struct drm_i915_gem_object *obj)
> +static void init_mmap_offset(struct drm_i915_gem_object *obj,
> + struct i915_mmap_offset *mmo)
> +{
> + mutex_lock(&obj->mmo_lock);
> + kref_init(&mmo->ref);
> + list_add(&mmo->offset, &obj->mmap_offsets);
> + mutex_unlock(&obj->mmo_lock);
> +
> + mmo->obj = obj;
> +}
> +
> +static int create_mmap_offset(struct drm_i915_gem_object *obj,
> + struct i915_mmap_offset *mmo)
> {
> struct drm_i915_private *i915 = to_i915(obj->base.dev);
> + struct drm_device *dev = obj->base.dev;
> int err;
>
> - err = drm_gem_create_mmap_offset(&obj->base);
> - if (likely(!err))
> + drm_vma_node_reset(&mmo->vma_node);
> + if (mmo->file)
> + drm_vma_node_allow(&mmo->vma_node, mmo->file);
> + err = drm_vma_offset_add(dev->vma_offset_manager, &mmo->vma_node,
> + obj->base.size / PAGE_SIZE);
> + if (likely(!err)) {
> + init_mmap_offset(obj, mmo);
> return 0;
> + }
>
> /* Attempt to reap some mmap space from dead objects */
> do {
> @@ -451,32 +478,48 @@ static int create_mmap_offset(struct drm_i915_gem_object *obj)
> break;
>
> i915_gem_drain_freed_objects(i915);
> - err = drm_gem_create_mmap_offset(&obj->base);
> - if (!err)
> + err = drm_vma_offset_add(dev->vma_offset_manager, &mmo->vma_node,
> + obj->base.size / PAGE_SIZE);
> + if (!err) {
> + init_mmap_offset(obj, mmo);
> break;
> + }
>
> } while (flush_delayed_work(&i915->gem.retire_work));
>
> return err;
> }
>
> -int
> -i915_gem_mmap_gtt(struct drm_file *file,
> - struct drm_device *dev,
> - u32 handle,
> - u64 *offset)
> +static int
> +__assign_gem_object_mmap_data(struct drm_file *file,
> + u32 handle,
> + enum i915_mmap_type mmap_type,
> + u64 *offset)
> {
> struct drm_i915_gem_object *obj;
> + struct i915_mmap_offset *mmo;
> int ret;
>
> obj = i915_gem_object_lookup(file, handle);
> if (!obj)
> return -ENOENT;
>
> - ret = create_mmap_offset(obj);
> - if (ret == 0)
> - *offset = drm_vma_node_offset_addr(&obj->base.vma_node);
> + mmo = kzalloc(sizeof(*mmo), GFP_KERNEL);
I got thrown off a bunch of times here reading the code, but I think I
got this right now.
Why exactly do we want multiple vma offsets? Yes this makes it a
drop-in replacement for the old cpu mmap ioctl, which was a bit
dubious design. But if we go all new here, I really wonder about why
this is necessary. No other discrete driver needs this, they all fix
the mmap mode for the lifetime of an object, because flushing stuff is
as expensive as just reallocating (or at least close enough).
I think us going once again our separate route here needs a lot more
justification than just "we've accidentally ended up with uapi like
this 10 years ago".
-Daniel
> + if (!mmo) {
> + ret = -ENOMEM;
> + goto err;
> + }
> +
> + mmo->file = file;
> + ret = create_mmap_offset(obj, mmo);
> + if (ret) {
> + kfree(mmo);
> + goto err;
> + }
>
> + mmo->mmap_type = mmap_type;
> + *offset = drm_vma_node_offset_addr(&mmo->vma_node);
> +err:
> i915_gem_object_put(obj);
> return ret;
> }
> @@ -500,9 +543,123 @@ int
> i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
> struct drm_file *file)
> {
> - struct drm_i915_gem_mmap_gtt *args = data;
> + struct drm_i915_gem_mmap_offset *args = data;
> +
> + return __assign_gem_object_mmap_data(file, args->handle,
> + I915_MMAP_TYPE_GTT,
> + &args->offset);
> +}
> +
> +void i915_mmap_offset_object_release(struct kref *ref)
> +{
> + struct i915_mmap_offset *mmo = container_of(ref,
> + struct i915_mmap_offset,
> + ref);
> + struct drm_i915_gem_object *obj = mmo->obj;
> + struct drm_device *dev = obj->base.dev;
> +
> + lockdep_assert_held(&obj->mmo_lock);
> +
> + if (mmo->file)
> + drm_vma_node_revoke(&mmo->vma_node, mmo->file);
> + drm_vma_offset_remove(dev->vma_offset_manager, &mmo->vma_node);
> + list_del(&mmo->offset);
>
> - return i915_gem_mmap_gtt(file, dev, args->handle, &args->offset);
> + kfree(mmo);
> +}
> +
> +static void i915_gem_vm_open(struct vm_area_struct *vma)
> +{
> + struct i915_mmap_offset *priv = vma->vm_private_data;
> + struct drm_i915_gem_object *obj = priv->obj;
> +
> + i915_gem_object_get(obj);
> + kref_get(&priv->ref);
> +}
> +
> +static void i915_gem_vm_close(struct vm_area_struct *vma)
> +{
> + struct i915_mmap_offset *priv = vma->vm_private_data;
> + struct drm_i915_gem_object *obj = priv->obj;
> +
> + mutex_lock(&obj->mmo_lock);
> + kref_put(&priv->ref, i915_mmap_offset_object_release);
> + mutex_unlock(&obj->mmo_lock);
> +
> + i915_gem_object_put(obj);
> +}
> +
> +static const struct vm_operations_struct i915_gem_gtt_vm_ops = {
> + .fault = i915_gem_fault,
> + .open = i915_gem_vm_open,
> + .close = i915_gem_vm_close,
> +};
> +
> +/* This overcomes the limitation in drm_gem_mmap's assignment of a
> + * drm_gem_object as the vma->vm_private_data. Since we need to
> + * be able to resolve multiple mmap offsets which could be tied
> + * to a single gem object.
> + */
> +int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma)
> +{
> + struct drm_vma_offset_node *node;
> + struct drm_file *priv = filp->private_data;
> + struct drm_device *dev = priv->minor->dev;
> + struct i915_mmap_offset *mmo = NULL;
> + struct drm_gem_object *obj = NULL;
> +
> + if (drm_dev_is_unplugged(dev))
> + return -ENODEV;
> +
> + drm_vma_offset_lock_lookup(dev->vma_offset_manager);
> + node = drm_vma_offset_exact_lookup_locked(dev->vma_offset_manager,
> + vma->vm_pgoff,
> + vma_pages(vma));
> + if (likely(node)) {
> + mmo = container_of(node, struct i915_mmap_offset,
> + vma_node);
> + /*
> + * Skip 0-refcnted objects as it is in the process of being
> + * destroyed and will be invalid when the vma manager lock
> + * is released.
> + */
> + obj = &mmo->obj->base;
> + if (!kref_get_unless_zero(&obj->refcount))
> + obj = NULL;
> + }
> + drm_vma_offset_unlock_lookup(dev->vma_offset_manager);
> +
> + if (!obj)
> + return -EINVAL;
> +
> + if (!drm_vma_node_is_allowed(node, priv)) {
> + drm_gem_object_put_unlocked(obj);
> + return -EACCES;
> + }
> +
> + if (to_intel_bo(obj)->readonly) {
> + if (vma->vm_flags & VM_WRITE) {
> + drm_gem_object_put_unlocked(obj);
> + return -EINVAL;
> + }
> +
> + vma->vm_flags &= ~VM_MAYWRITE;
> + }
> +
> + vma->vm_flags |= VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
> + vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
> + vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
> + vma->vm_private_data = mmo;
> +
> + vma->vm_ops = &i915_gem_gtt_vm_ops;
> +
> + /*
> + * Take a ref for our mmap_offset object. The reference is cleaned
> + * up when the vma is closed.
> + */
> + kref_get(&mmo->ref);
> +
> + return 0;
> }
>
> #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
> index d7855dc5a5c5..eb3d7f3528f3 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
> @@ -58,6 +58,9 @@ void i915_gem_object_init(struct drm_i915_gem_object *obj,
>
> INIT_LIST_HEAD(&obj->lut_list);
>
> + mutex_init(&obj->mmo_lock);
> + INIT_LIST_HEAD(&obj->mmap_offsets);
> +
> init_rcu_head(&obj->rcu);
>
> obj->ops = ops;
> @@ -94,6 +97,7 @@ void i915_gem_close_object(struct drm_gem_object *gem, struct drm_file *file)
> struct drm_i915_gem_object *obj = to_intel_bo(gem);
> struct drm_i915_file_private *fpriv = file->driver_priv;
> struct i915_lut_handle *lut, *ln;
> + struct i915_mmap_offset *mmo, *on;
> LIST_HEAD(close);
>
> i915_gem_object_lock(obj);
> @@ -108,6 +112,13 @@ void i915_gem_close_object(struct drm_gem_object *gem, struct drm_file *file)
> }
> i915_gem_object_unlock(obj);
>
> + mutex_lock(&obj->mmo_lock);
> + list_for_each_entry_safe(mmo, on, &obj->mmap_offsets, offset) {
> + if (mmo->file == file)
> + kref_put(&mmo->ref, i915_mmap_offset_object_release);
> + }
> + mutex_unlock(&obj->mmo_lock);
> +
> list_for_each_entry_safe(lut, ln, &close, obj_link) {
> struct i915_gem_context *ctx = lut->ctx;
> struct i915_vma *vma;
> @@ -156,6 +167,7 @@ static void __i915_gem_free_objects(struct drm_i915_private *i915,
> wakeref = intel_runtime_pm_get(&i915->runtime_pm);
> llist_for_each_entry_safe(obj, on, freed, freed) {
> struct i915_vma *vma, *vn;
> + struct i915_mmap_offset *mmo, *on;
>
> trace_i915_gem_object_destroy(obj);
>
> @@ -169,6 +181,13 @@ static void __i915_gem_free_objects(struct drm_i915_private *i915,
> GEM_BUG_ON(!list_empty(&obj->vma.list));
> GEM_BUG_ON(!RB_EMPTY_ROOT(&obj->vma.tree));
>
> + i915_gem_object_release_mmap(obj);
> +
> + mutex_lock(&obj->mmo_lock);
> + list_for_each_entry_safe(mmo, on, &obj->mmap_offsets, offset)
> + kref_put(&mmo->ref, i915_mmap_offset_object_release);
> + mutex_unlock(&obj->mmo_lock);
> +
> mutex_unlock(&i915->drm.struct_mutex);
>
> GEM_BUG_ON(atomic_read(&obj->bind_count));
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
> index 5efb9936e05b..d667ed8bb0a6 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
> @@ -125,13 +125,13 @@ void i915_gem_object_unlock_fence(struct drm_i915_gem_object *obj,
> static inline void
> i915_gem_object_set_readonly(struct drm_i915_gem_object *obj)
> {
> - obj->base.vma_node.readonly = true;
> + obj->readonly = true;
> }
>
> static inline bool
> i915_gem_object_is_readonly(const struct drm_i915_gem_object *obj)
> {
> - return obj->base.vma_node.readonly;
> + return obj->readonly;
> }
>
> static inline bool
> @@ -423,6 +423,9 @@ int i915_gem_object_wait(struct drm_i915_gem_object *obj,
> int i915_gem_object_wait_priority(struct drm_i915_gem_object *obj,
> unsigned int flags,
> const struct i915_sched_attr *attr);
> +
> +void i915_mmap_offset_object_release(struct kref *ref);
> +
> #define I915_PRIORITY_DISPLAY I915_USER_PRIORITY(I915_PRIORITY_MAX)
>
> #endif
> 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 ede0eb4218a8..d74ddb479318 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
> @@ -60,6 +60,19 @@ struct drm_i915_gem_object_ops {
> void (*release)(struct drm_i915_gem_object *obj);
> };
>
> +enum i915_mmap_type {
> + I915_MMAP_TYPE_GTT = 0,
> +};
> +
> +struct i915_mmap_offset {
> + struct drm_vma_offset_node vma_node;
> + struct drm_i915_gem_object *obj;
> + struct drm_file *file;
> + enum i915_mmap_type mmap_type;
> + struct kref ref;
> + struct list_head offset;
> +};
> +
> struct drm_i915_gem_object {
> struct drm_gem_object base;
>
> @@ -115,6 +128,11 @@ struct drm_i915_gem_object {
> unsigned int userfault_count;
> struct list_head userfault_link;
>
> + /* Protects access to mmap offsets */
> + struct mutex mmo_lock;
> + struct list_head mmap_offsets;
> + bool readonly:1;
> +
> I915_SELFTEST_DECLARE(struct list_head st_link);
>
> /*
> 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 1d27babff0ce..a7513421b1db 100644
> --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
> +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
> @@ -371,15 +371,20 @@ static bool assert_mmap_offset(struct drm_i915_private *i915,
> int expected)
> {
> struct drm_i915_gem_object *obj;
> + /* refcounted in create_mmap_offset */
> + struct i915_mmap_offset *mmo = kzalloc(sizeof(*mmo), GFP_KERNEL);
> int err;
>
> obj = i915_gem_object_create_internal(i915, size);
> if (IS_ERR(obj))
> return PTR_ERR(obj);
>
> - err = create_mmap_offset(obj);
> + err = create_mmap_offset(obj, mmo);
> + if (err)
> + kfree(mmo);
> i915_gem_object_put(obj);
>
> +
> return err == expected;
> }
>
> @@ -422,6 +427,8 @@ static int igt_mmap_offset_exhaustion(void *arg)
> struct drm_mm *mm = &i915->drm.vma_offset_manager->vm_addr_space_mm;
> struct drm_i915_gem_object *obj;
> struct drm_mm_node resv, *hole;
> + /* refcounted in create_mmap_offset */
> + struct i915_mmap_offset *mmo = kzalloc(sizeof(*mmo), GFP_KERNEL);
> u64 hole_start, hole_end;
> int loop, err;
>
> @@ -465,9 +472,10 @@ static int igt_mmap_offset_exhaustion(void *arg)
> goto out;
> }
>
> - err = create_mmap_offset(obj);
> + err = create_mmap_offset(obj, mmo);
> if (err) {
> pr_err("Unable to insert object into reclaimed hole\n");
> + kfree(mmo);
> goto err_obj;
> }
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
> index b9d84d52e986..7b82ef888b96 100644
> --- a/drivers/gpu/drm/i915/gt/intel_reset.c
> +++ b/drivers/gpu/drm/i915/gt/intel_reset.c
> @@ -628,6 +628,7 @@ static void revoke_mmaps(struct intel_gt *gt)
>
> for (i = 0; i < gt->ggtt->num_fences; i++) {
> struct drm_vma_offset_node *node;
> + struct i915_mmap_offset *mmo;
> struct i915_vma *vma;
> u64 vma_offset;
>
> @@ -641,10 +642,18 @@ static void revoke_mmaps(struct intel_gt *gt)
> GEM_BUG_ON(vma->fence != >->ggtt->fence_regs[i]);
> node = &vma->obj->base.vma_node;
> vma_offset = vma->ggtt_view.partial.offset << PAGE_SHIFT;
> - unmap_mapping_range(gt->i915->drm.anon_inode->i_mapping,
> +
> + list_for_each_entry(mmo, &vma->obj->mmap_offsets, offset) {
> + node = &mmo->vma_node;
> + if (!drm_mm_node_allocated(&node->vm_node) ||
> + mmo->mmap_type != I915_MMAP_TYPE_GTT)
> + continue;
> +
> + unmap_mapping_range(gt->i915->drm.anon_inode->i_mapping,
> drm_vma_node_offset_addr(node) + vma_offset,
> vma->size,
> 1);
> + }
> }
> }
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 1c4576a4a5e9..bdd597200984 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -2722,18 +2722,12 @@ const struct dev_pm_ops i915_pm_ops = {
> .runtime_resume = intel_runtime_resume,
> };
>
> -static const struct vm_operations_struct i915_gem_vm_ops = {
> - .fault = i915_gem_fault,
> - .open = drm_gem_vm_open,
> - .close = drm_gem_vm_close,
> -};
> -
> static const struct file_operations i915_driver_fops = {
> .owner = THIS_MODULE,
> .open = drm_open,
> .release = drm_release,
> .unlocked_ioctl = drm_ioctl,
> - .mmap = drm_gem_mmap,
> + .mmap = i915_gem_mmap,
> .poll = drm_poll,
> .read = drm_read,
> .compat_ioctl = i915_compat_ioctl,
> @@ -2822,7 +2816,6 @@ static struct drm_driver driver = {
>
> .gem_close_object = i915_gem_close_object,
> .gem_free_object_unlocked = i915_gem_free_object,
> - .gem_vm_ops = &i915_gem_vm_ops,
>
> .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
> .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index b42651a387d9..bf2927e88e14 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2327,6 +2327,7 @@ int i915_gem_wait_for_idle(struct drm_i915_private *dev_priv,
> void i915_gem_suspend(struct drm_i915_private *dev_priv);
> void i915_gem_suspend_late(struct drm_i915_private *dev_priv);
> void i915_gem_resume(struct drm_i915_private *dev_priv);
> +int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma);
> vm_fault_t i915_gem_fault(struct vm_fault *vmf);
>
> int i915_gem_open(struct drm_i915_private *i915, struct drm_file *file);
> diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
> index e0e677b2a3a9..677323644319 100644
> --- a/drivers/gpu/drm/i915/i915_vma.c
> +++ b/drivers/gpu/drm/i915/i915_vma.c
> @@ -861,7 +861,8 @@ static void __i915_vma_iounmap(struct i915_vma *vma)
>
> void i915_vma_revoke_mmap(struct i915_vma *vma)
> {
> - struct drm_vma_offset_node *node = &vma->obj->base.vma_node;
> + struct drm_vma_offset_node *node;
> + struct i915_mmap_offset *mmo;
> u64 vma_offset;
>
> lockdep_assert_held(&vma->vm->mutex);
> @@ -873,10 +874,19 @@ void i915_vma_revoke_mmap(struct i915_vma *vma)
> GEM_BUG_ON(!vma->obj->userfault_count);
>
> 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);
> +
> + list_for_each_entry(mmo, &vma->obj->mmap_offsets, offset) {
> + node = &mmo->vma_node;
> + /* Only gtt-mmaps for this vma should be unmapped */
> + if (!drm_mm_node_allocated(&node->vm_node) ||
> + mmo->mmap_type != I915_MMAP_TYPE_GTT)
> + continue;
> +
> + 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)
> --
> 2.23.0
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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