On Wed, Aug 13, 2014 at 11:51:54AM +0100, Chris Wilson wrote: > As we use WC updates of the PTE, we are responsible for notifying the > hardware when to flush its TLBs. Do so after we zap all the PTEs before > suspend (and the BIOS tries to read our GTT). > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Imo would make more sense to add them to the clear_range functions. -Daniel > --- > drivers/gpu/drm/i915/i915_drv.h | 2 +- > drivers/gpu/drm/i915/i915_gem_gtt.c | 14 +++++++++++++- > 2 files changed, 14 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h > index d1513e6ea50d..d0222cb9b7a5 100644 > --- a/drivers/gpu/drm/i915/i915_drv.h > +++ b/drivers/gpu/drm/i915/i915_drv.h > @@ -2082,7 +2082,7 @@ struct drm_i915_cmd_table { > > /* Note that the (struct drm_i915_private *) cast is just to shut up gcc. */ > #define __I915__(p) ((sizeof(*(p)) == sizeof(struct drm_i915_private)) ? \ > - (struct drm_i915_private *)(p) : to_i915(p)) > + (struct drm_i915_private *)(p) : to_i915((struct drm_device *)p)) > #define INTEL_INFO(p) (&__I915__(p)->info) > #define INTEL_DEVID(p) (INTEL_INFO(p)->device_id) > > diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c > index f3fd448505f1..b8d5a5d67a73 100644 > --- a/drivers/gpu/drm/i915/i915_gem_gtt.c > +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c > @@ -1316,6 +1316,16 @@ void i915_check_and_clear_faults(struct drm_device *dev) > POSTING_READ(RING_FAULT_REG(&dev_priv->ring[RCS])); > } > > +static void i915_ggtt_flush(struct drm_i915_private *dev_priv) > +{ > + if (INTEL_INFO(dev_priv)->gen < 6) { > + intel_gtt_chipset_flush(); > + } else { > + I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN); > + POSTING_READ(GFX_FLSH_CNTL_GEN6); > + } > +} > + > void i915_gem_suspend_gtt_mappings(struct drm_device *dev) > { > struct drm_i915_private *dev_priv = dev->dev_private; > @@ -1332,6 +1342,8 @@ void i915_gem_suspend_gtt_mappings(struct drm_device *dev) > dev_priv->gtt.base.start, > dev_priv->gtt.base.total, > true); > + > + i915_ggtt_flush(dev_priv); > } > > void i915_gem_restore_gtt_mappings(struct drm_device *dev) > @@ -1384,7 +1396,7 @@ void i915_gem_restore_gtt_mappings(struct drm_device *dev) > gen6_write_pdes(container_of(vm, struct i915_hw_ppgtt, base)); > } > > - i915_gem_chipset_flush(dev); > + i915_ggtt_flush(dev_priv); > } > > int i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj) > -- > 2.1.0.rc1 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx