On Wed, Mar 05, 2014 at 07:24:37AM -0800, Ben Widawsky wrote:
> On Wed, Mar 05, 2014 at 11:13:12AM +0200, Jani Nikula wrote:
> > On Wed, 05 Mar 2014, Ben Widawsky <benjamin.widawsky@xxxxxxxxx> wrote:
> > > The PDE needs to wrap after writing all the PTEs. Quite a small/silly
> > > bug to find in the massive change. It was introduced:
> > > commit 307dc4f99f6d3a74a78b0e776838f35b2004f14d
> > > Author: Ben Widawsky <benjamin.widawsky@xxxxxxxxx>
> > > Date: Thu Feb 20 11:51:21 2014 -0800
> > >
> > > drm/i915/bdw: Reorganize PT allocations
> >
> > As noted in the bug, the commit merged to dinq is correct, and the
> > commit referenced above apparently only lives in some temporary branch.
> >
> > BR,
> > Jani.
> >
>
> My eyes are playing tricks on me. Sorry for the noise.
>
It's not my eyes. It's something else. WTF is going on?
bwidawsk@bolo_yeung ~/intel-gfx/drm-intel (drm-intel-nightly)$ tsocks git fetch upstream
bwidawsk@bolo_yeung ~/intel-gfx/drm-intel (drm-intel-nightly)$ git reset --hard upstream/drm-intel-nightly
HEAD is now at 97d10a0 drm-intel-nightly: 2014y-03m-05d-20h-31m-21s integration manifest
bwidawsk@bolo_yeung ~/intel-gfx/drm-intel (drm-intel-nightly)$ sed -n '338p' drivers/gpu/drm/i915/i915_gem_gtt.c
if (pde + 1 == GEN8_PDES_PER_PAGE) {
> >
> > >
> > > I can't actually test this patch at the moment because my Broadwell is
> > > unresponsive. This should be squashed if possible.
> > >
> > > Cc: Imre Deak <imre.deak@xxxxxxxxx>
> > > Reported-by: Timo Aaltonen <tjaalton@xxxxxxxxxx>
> > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75763
> > > Signed-off-by: Ben Widawsky <ben@xxxxxxxxxxxx>
> > > ---
> > > drivers/gpu/drm/i915/i915_gem_gtt.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > > index 5462037..2bde703 100644
> > > --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> > > +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > > @@ -335,7 +335,7 @@ static void gen8_ppgtt_insert_entries(struct i915_address_space *vm,
> > > if (++pte == GEN8_PTES_PER_PAGE) {
> > > kunmap_atomic(pt_vaddr);
> > > pt_vaddr = NULL;
> > > - if (pde + 1 == GEN8_PDES_PER_PAGE) {
> > > + if (++pde == GEN8_PDES_PER_PAGE) {
> > > pdpe++;
> > > pde = 0;
> > > }
> > > --
> > > 1.9.0
> > >
> > > _______________________________________________
> > > Intel-gfx mailing list
> > > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> >
> > --
> > Jani Nikula, Intel Open Source Technology Center
>
> --
> Ben Widawsky, Intel Open Source Technology Center
--
Ben Widawsky, Intel Open Source Technology Center
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