[Mesa-dev] [PATCH 10/22] intel/blorp: Add an entrypoint for clearing depth and stencil

[Jason Ekstrand]

On Oct 9, 2016 10:48 PM, "Pohjolainen, Topi" <topi.pohjolainen at gmail.com>
wrote:
>
> On Fri, Oct 07, 2016 at 09:41:08PM -0700, Jason Ekstrand wrote:
> > Signed-off-by: Jason Ekstrand <jason at jlekstrand.net>
> > ---
> >  src/intel/blorp/blorp.h       | 10 ++++++++
> >  src/intel/blorp/blorp_clear.c | 58
+++++++++++++++++++++++++++++++++++++++++++
> >  2 files changed, 68 insertions(+)
> >
> > diff --git a/src/intel/blorp/blorp.h b/src/intel/blorp/blorp.h
> > index 480f1bb..263d194 100644
> > --- a/src/intel/blorp/blorp.h
> > +++ b/src/intel/blorp/blorp.h
> > @@ -134,6 +134,16 @@ blorp_clear(struct blorp_batch *batch,
> >              const bool color_write_disable[4]);
> >
> >  void
> > +blorp_clear_depth_stencil(struct blorp_batch *batch,
> > +                          const struct blorp_surf *depth,
> > +                          const struct blorp_surf *stencil,
> > +                          uint32_t level, uint32_t start_layer,
> > +                          uint32_t num_layers,
> > +                          uint32_t x0, uint32_t y0, uint32_t x1,
uint32_t y1,
> > +                          bool clear_depth, float depth_value,
> > +                          bool clear_stencil, uint8_t stencil_value);
> > +
> > +void
> >  blorp_ccs_resolve(struct blorp_batch *batch,
> >                    struct blorp_surf *surf, enum isl_format format);
> >
> > diff --git a/src/intel/blorp/blorp_clear.c
b/src/intel/blorp/blorp_clear.c
> > index a8f29fd..1d6bf1c 100644
> > --- a/src/intel/blorp/blorp_clear.c
> > +++ b/src/intel/blorp/blorp_clear.c
> > @@ -306,6 +306,64 @@ blorp_clear(struct blorp_batch *batch,
> >  }
> >
> >  void
> > +blorp_clear_depth_stencil(struct blorp_batch *batch,
> > +                          const struct blorp_surf *depth,
> > +                          const struct blorp_surf *stencil,
> > +                          uint32_t level, uint32_t start_layer,
> > +                          uint32_t num_layers,
> > +                          uint32_t x0, uint32_t y0, uint32_t x1,
uint32_t y1,
> > +                          bool clear_depth, float depth_value,
> > +                          bool clear_stencil, uint8_t stencil_value)
> > +{
> > +   struct blorp_params params;
> > +   blorp_params_init(&params);
> > +
> > +   params.x0 = x0;
> > +   params.y0 = y0;
> > +   params.x1 = x1;
> > +   params.y1 = y1;
> > +
> > +   while (num_layers > 0) {
> > +      params.num_layers = num_layers;
> > +
> > +      if (clear_stencil) {
> > +         brw_blorp_surface_info_init(batch->blorp, &params.stencil,
stencil,
> > +                                     level, start_layer,
> > +                                     ISL_FORMAT_UNSUPPORTED, true);
> > +         params.stencil_ref = stencil_value;
> > +
> > +         params.dst.surf.samples = params.stencil.surf.samples;
> > +         params.dst.surf.logical_level0_px =
> > +            params.stencil.surf.logical_level0_px;
> > +
> > +         if (params.stencil.view.array_len < params.num_layers)
> > +            params.num_layers = params.stencil.view.array_len;
> > +      }
> > +
> > +      if (clear_depth) {
> > +         brw_blorp_surface_info_init(batch->blorp, &params.depth,
depth,
> > +                                     level, start_layer,
> > +                                     ISL_FORMAT_UNSUPPORTED, true);
> > +         params.z = depth_value;
> > +         params.depth_format =
> > +            isl_format_get_depth_format(depth->surf->format, false);
> > +
> > +         params.dst.surf.samples = params.depth.surf.samples;
> > +         params.dst.surf.logical_level0_px =
> > +            params.depth.surf.logical_level0_px;
> > +
> > +         if (params.depth.view.array_len < params.num_layers)
> > +            params.num_layers = params.depth.view.array_len;
>
> Stencil already does the same, could we add an assert here:
>
>                assert(!clear_stencil ||
>                       params.depth.view.array_len ==
>                       params.stencil.view.array_len)

Sure.

>
> Moreover, I thought that start_layer + num_layers <= view.array_len should
> always apply. You seem to explicitly prepare for that not to hold. Could
you
> give an example?

I had to do this recently with the other clears as well.  Sandy Bridge has
a max of 512 layers for rendering.  In the surface_info_init function, we
clamp as needed and this ensures that 16k-slice textures get 32 draw calls.

> > +      }
> > +
> > +      batch->blorp->exec(batch, &params);
> > +
> > +      start_layer += params.num_layers;
> > +      num_layers -= params.num_layers;
> > +   }
> > +}
> > +
> > +void
> >  blorp_ccs_resolve(struct blorp_batch *batch,
> >                    struct blorp_surf *surf, enum isl_format format)
> >  {
> > --
> > 2.5.0.400.gff86faf
> >
> > _______________________________________________
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> > mesa-dev at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/mesa-dev
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