Re: [PATCH] [v6] drm/i915: Use the new vm [un]bind functions

[Ben Widawsky <ben@bwidawsk.net>]

On Thu, Sep 19, 2013 at 03:47:50PM +0100, Chris Wilson wrote:
> On Thu, Sep 19, 2013 at 07:41:23AM -0700, Ben Widawsky wrote:
> > diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> > index b26d979..e57837c 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> > @@ -286,8 +286,9 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj,
> >  	if (unlikely(IS_GEN6(dev) &&
> >  	    reloc->write_domain == I915_GEM_DOMAIN_INSTRUCTION &&
> >  	    !target_i915_obj->has_global_gtt_mapping)) {
> > -		i915_gem_gtt_bind_object(target_i915_obj,
> > -					 target_i915_obj->cache_level);
> > +		struct i915_vma *vma = i915_gem_obj_to_vma(obj, vm);
> > +		vma->vm->bind_vma(vma, target_i915_obj->cache_level,
> > +				 GLOBAL_BIND);
> 
> Danger, danger. What address are we binding the vma here to since vm !=
> ggtt, and the wa requires that the obj is mapped into the same location
> in the ggtt as the vm. That requires pinning during reserve.
> -Chris
> 
> -- 
> Chris Wilson, Intel Open Source Technology Centre

I thought we've agreed to not support full PPGTT on SNB? If you want an
assertion vm == i915_ggtt, I can do that.
-- 
Ben Widawsky, Intel Open Source Technology Center