On Thu, Jun 27, 2013 at 04:30:43PM -0700, Ben Widawsky wrote:
> It's quite common for an object to simply be on the inactive list (and
> not unbound) when we want to free the context. This of course happens
> with lazy unbinding. Simply, this is needed when an object isn't fully
> unbound but we want to free one VMA of the object, for whatever reason.
>
> Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> drivers/gpu/drm/i915/i915_gem.c | 28 ++++++++++++++++++++++++++++
> drivers/gpu/drm/i915/i915_gem_context.c | 1 +
> 3 files changed, 30 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 0bc4251..9febcdd 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1674,6 +1674,7 @@ void i915_gem_free_object(struct drm_gem_object *obj);
> struct i915_vma *i915_gem_vma_create(struct drm_i915_gem_object *obj,
> struct i915_address_space *vm);
> void i915_gem_vma_destroy(struct i915_vma *vma);
> +void i915_gem_vma_cleanup(struct i915_address_space *vm);
>
> int __must_check i915_gem_object_pin(struct drm_i915_gem_object *obj,
> struct i915_address_space *vm,
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 12d0e61..9abc3c8 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -4134,6 +4134,34 @@ void i915_gem_vma_destroy(struct i915_vma *vma)
> kfree(vma);
> }
>
> +/* This is like unbind() but without gtt considerations */
> +void i915_gem_vma_cleanup(struct i915_address_space *vm)
> +{
> + struct drm_i915_private *dev_priv = vm->dev->dev_private;
> + struct i915_vma *vma, *n;
> +
> + BUG_ON(is_i915_ggtt(vm));
> + WARN_ON(!list_empty(&vm->active_list));
> +
> + list_for_each_entry_safe(vma, n, &vm->vma_list, per_vm_link) {
> + struct drm_i915_gem_object *obj = vma->obj;
> +
> + if (WARN_ON(!i915_gem_obj_bound(obj, vm)))
> + continue;
> +
> + i915_gem_object_unpin_pages(obj);
> +
> + list_del(&vma->mm_list);
> + list_del(&vma->vma_link);
> + drm_mm_remove_node(&vma->node);
> + i915_gem_vma_destroy(vma);
Is there a good reason why all of that stuff isn't included in
i915_gem_vma_destroy()? It seems like it should be there.
> +
> + if (list_empty(&obj->vma_list))
> + list_move_tail(&obj->global_list,
> + &dev_priv->mm.unbound_list);
> + }
> +}
> +
> int
> i915_gem_idle(struct drm_device *dev)
> {
> diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
> index 988123f..c45cd5c 100644
> --- a/drivers/gpu/drm/i915/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/i915_gem_context.c
> @@ -129,6 +129,7 @@ void i915_gem_context_free(struct kref *ctx_ref)
> struct i915_hw_context *ctx = container_of(ctx_ref,
> typeof(*ctx), ref);
>
> + i915_gem_vma_cleanup(&ctx->ppgtt.base);
> if (ctx->ppgtt.cleanup)
> ctx->ppgtt.cleanup(&ctx->ppgtt);
> drm_gem_object_unreference(&ctx->obj->base);
> --
> 1.8.3.1
>
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> Intel-gfx at lists.freedesktop.org
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--
Ville Syrj?l?
Intel OTC
