On Wed, Sep 19, 2012 at 01:28:57PM -0700, Jesse Barnes wrote: > Some commands and workarounds require stores to occur to function > correctly, so add some scratch space to the HWS page to accommodate > them. > > Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org> > --- > drivers/gpu/drm/i915/intel_ringbuffer.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h > index 2ea7a31..ef85742 100644 > --- a/drivers/gpu/drm/i915/intel_ringbuffer.h > +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h > @@ -181,6 +181,7 @@ intel_read_status_page(struct intel_ring_buffer *ring, > * The area from dword 0x20 to 0x3ff is available for driver usage. > */ > #define I915_GEM_HWS_INDEX 0x20 > +#define I915_GEM_SCRATCH_INDEX 0x28 /* Some commands need a scratch store */ Any specific reason for using an index divisible by 8? Afaik this is an index, and the hw multiplies by 4 on it's own. So looks a bit puzzling when reading (since iirc only 0x21 is used anywhere else, in some dri1 stuff). -Daniel > > void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring); > > -- > 1.7.9.5 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
