Re: [PATCH v10 04/11] drm/i915/gem: selftest should not attempt mmap of private regions

[Matthew Auld]

On 08/07/2022 14:22, Robert Beckett wrote:
> On 08/07/2022 08:53, Matthew Auld wrote:
> > On 07/07/2022 21:02, Robert Beckett wrote:
> > > During testing make can_mmap consider whether the region is private.
> >
> > Do we still need this with: 938d2fd17d17 ("drm/i915/selftests: skip 
> > the mman tests for stolen") ?
>
> huh, I guess not. That wasn't in my tree. I guess I should rebase.
>
> Looking at it, my patch would have been preferable initially I think. 
> Each location of the additional checks in that patch first call 
> cam_mmap(), which I think is the most appropriate place to make the 
> decision.

It fails at the object_create() I think (on small-BAR I mean), which is 
before we can call can_mmap(), passing in the object.

> I could do a replacement patch that reverts that one if preferred, or we 
> can leave it as is and I will drop this patch.
>
>
> > > Signed-off-by: Robert Beckett <bob.beckett@xxxxxxxxxxxxx>
> > > Reviewed-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
> > > ---
> > >   drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c | 3 +++
> > >   1 file changed, 3 insertions(+)
> > >
> > > 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 5bc93a1ce3e3..76181e28c75e 100644
> > > --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
> > > +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
> > > @@ -869,6 +869,9 @@ static bool can_mmap(struct drm_i915_gem_object 
> > > *obj, enum i915_mmap_type type)
> > >       struct drm_i915_private *i915 = to_i915(obj->base.dev);
> > >       bool no_map;
> > > +    if (obj->mm.region && obj->mm.region->private)
> > > +        return false;
> > > +
> > >       if (obj->ops->mmap_offset)
> > >           return type == I915_MMAP_TYPE_FIXED;
> > >       else if (type == I915_MMAP_TYPE_FIXED)