Re: [PATCH 3/7] drm/i915/gem: Unify user object creation

[Jason Ekstrand <jason@jlekstrand.net>]

On Fri, Jul 16, 2021 at 6:21 AM Matthew Auld
<matthew.william.auld@gmail.com> wrote:
>
> On Thu, 15 Jul 2021 at 23:39, Jason Ekstrand <jason@jlekstrand.net> wrote:
> >
> > Instead of hand-rolling the same three calls in each function, pull them
> > into an i915_gem_object_create_user helper.  Apart from re-ordering of
> > the placements array ENOMEM check, the only functional change here
> > should be that i915_gem_dumb_create now calls i915_gem_flush_free_objects
> > which it probably should have been calling all along.
> >
> > Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
> > ---
> >  drivers/gpu/drm/i915/gem/i915_gem_create.c | 106 +++++++++------------
> >  1 file changed, 43 insertions(+), 63 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/gem/i915_gem_create.c b/drivers/gpu/drm/i915/gem/i915_gem_create.c
> > index 391c8c4a12172..69bf9ec777642 100644
> > --- a/drivers/gpu/drm/i915/gem/i915_gem_create.c
> > +++ b/drivers/gpu/drm/i915/gem/i915_gem_create.c
> > @@ -11,13 +11,14 @@
> >  #include "i915_trace.h"
> >  #include "i915_user_extensions.h"
> >
> > -static u32 object_max_page_size(struct drm_i915_gem_object *obj)
> > +static u32 object_max_page_size(struct intel_memory_region **placements,
> > +                               unsigned int n_placements)
> >  {
> >         u32 max_page_size = 0;
> >         int i;
> >
> > -       for (i = 0; i < obj->mm.n_placements; i++) {
> > -               struct intel_memory_region *mr = obj->mm.placements[i];
> > +       for (i = 0; i < n_placements; i++) {
> > +               struct intel_memory_region *mr = placements[i];
> >
> >                 GEM_BUG_ON(!is_power_of_2(mr->min_page_size));
> >                 max_page_size = max_t(u32, max_page_size, mr->min_page_size);
> > @@ -81,22 +82,35 @@ static int i915_gem_publish(struct drm_i915_gem_object *obj,
> >         return 0;
> >  }
> >
> > -static int
> > -i915_gem_setup(struct drm_i915_gem_object *obj, u64 size)
> > +static struct drm_i915_gem_object *
> > +i915_gem_object_create_user(struct drm_i915_private *i915, u64 size,
>
> create_user sounds nice.
>
> > +                           struct intel_memory_region **placements,
> > +                           unsigned int n_placements)
> >  {
> > -       struct intel_memory_region *mr = obj->mm.placements[0];
> > +       struct intel_memory_region *mr = placements[0];
> > +       struct drm_i915_gem_object *obj;
> >         unsigned int flags;
> >         int ret;
> >
> > -       size = round_up(size, object_max_page_size(obj));
> > +       i915_gem_flush_free_objects(i915);
>
> Needs to be a separate patch.

Done.

> > +
> > +       obj = i915_gem_object_alloc();
> > +       if (!obj)
> > +               return ERR_PTR(-ENOMEM);
>
> Should move this way down, so we don't accidently leak it.

Done.

--Jason