[PATCH 6/6] etnaviv: upgrade DISCARD_RANGE to DISCARD_WHOLE_RESOURCE if possible

[Lucas Stach]

Am Donnerstag, den 08.06.2017, 15:08 +0200 schrieb Wladimir J. van der
Laan:
> Hello Lucas,
> 
> On Thu, Jun 08, 2017 at 10:26:04AM +0200, Lucas Stach wrote:
> > Hi Wladimir,
> > 
> > did you also review this patch? It's the last one of this series missing
> > review.
> 
> Sorry, no, I missed it somehow.
> Looks obviously correct to me, and matches the code from VC4 (apart from the coherent which you mention), so
> 
> Reviewed-By: Wladimir J. van der Laan <laanwj at gmail.com>

Thanks,
I've pushed this series to upstream MESA.

Regards,
Lucas

> > Am Freitag, den 19.05.2017, 11:41 +0200 schrieb Lucas Stach:
> > > Stolen from VC4. As we don't do any fancy reallocation tricks yet, it's
> > > possible to upgrade also coherent mappings and shared resources.
> > > 
> > > Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
> > > ---
> > >  src/gallium/drivers/etnaviv/etnaviv_transfer.c | 14 ++++++++++++++
> > >  1 file changed, 14 insertions(+)
> > > 
> > > diff --git a/src/gallium/drivers/etnaviv/etnaviv_transfer.c b/src/gallium/drivers/etnaviv/etnaviv_transfer.c
> > > index 05cdbc599956..fe57aa4d17b2 100644
> > > --- a/src/gallium/drivers/etnaviv/etnaviv_transfer.c
> > > +++ b/src/gallium/drivers/etnaviv/etnaviv_transfer.c
> > > @@ -148,6 +148,20 @@ etna_transfer_map(struct pipe_context *pctx, struct pipe_resource *prsc,
> > >  
> > >     assert(level <= prsc->last_level);
> > >  
> > > +   /* Upgrade DISCARD_RANGE to WHOLE_RESOURCE if the whole resource is
> > > +    * being mapped. If we add buffer reallocation to avoid CPU/GPU sync this
> > > +    * check needs to be extended to coherent mappings and shared resources.
> > > +    */
> > > +   if ((usage & PIPE_TRANSFER_DISCARD_RANGE) &&
> > > +       !(usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
> > > +       prsc->last_level == 0 &&
> > > +       prsc->width0 == box->width &&
> > > +       prsc->height0 == box->height &&
> > > +       prsc->depth0 == box->depth &&
> > > +       prsc->array_size == 1) {
> > > +      usage |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
> > > +   }
> > > +
> > >     if (rsc->texture && !etna_resource_newer(rsc, etna_resource(rsc->texture))) {
> > >        /* We have a texture resource which is the same age or newer than the
> > >         * render resource. Use the texture resource, which avoids bouncing
> > 
> > 
>