| Message ID | 1350564275-27885-1-git-send-email-daniel.vetter@ffwll.ch (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, 18 Oct 2012 14:44:35 +0200, Daniel Vetter <daniel.vetter@ffwll.ch> wrote: > Single-threaded forcewake was only used on some early pre-production > ivybridge machines, all the latest ones should use mt forcewake. And > we already assume this in other places of the code (e.g. DERRMR > support in the ddx, or the latest intel_gt_reset patch to reset any > lingering forcewake references left behind by the bios), so don't > bother here, too. > > Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> > --- Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> --------------------------------------------------------------------- Intel Finland Oy Registered Address: PL 281, 00181 Helsinki Business Identity Code: 0357606 - 4 Domiciled in Helsinki This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.
On Thu, 18 Oct 2012 14:44:35 +0200 Daniel Vetter <daniel.vetter@ffwll.ch> wrote: > Single-threaded forcewake was only used on some early pre-production > ivybridge machines, all the latest ones should use mt forcewake. And > we already assume this in other places of the code (e.g. DERRMR > support in the ddx, or the latest intel_gt_reset patch to reset any > lingering forcewake references left behind by the bios), so don't > bother here, too. > > Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> > --- > drivers/gpu/drm/i915/intel_pm.c | 31 ++++--------------------------- > 1 file changed, 4 insertions(+), 27 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index 2b3cddf..568c98d 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -4146,35 +4146,12 @@ void intel_gt_init(struct drm_device *dev) > if (IS_VALLEYVIEW(dev)) { > dev_priv->gt.force_wake_get = vlv_force_wake_get; > dev_priv->gt.force_wake_put = vlv_force_wake_put; > - } else if (INTEL_INFO(dev)->gen >= 6) { > + } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { > + dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get; > + dev_priv->gt.force_wake_put = __gen6_gt_force_wake_mt_put; > + } else if (IS_GEN6(dev)) { > dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get; > dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put; > - > - /* IVB configs may use multi-threaded forcewake */ > - if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { > - u32 ecobus; > - > - /* A small trick here - if the bios hasn't configured > - * MT forcewake, and if the device is in RC6, then > - * force_wake_mt_get will not wake the device and the > - * ECOBUS read will return zero. Which will be > - * (correctly) interpreted by the test below as MT > - * forcewake being disabled. > - */ > - mutex_lock(&dev->struct_mutex); > - __gen6_gt_force_wake_mt_get(dev_priv); > - ecobus = I915_READ_NOTRACE(ECOBUS); > - __gen6_gt_force_wake_mt_put(dev_priv); > - mutex_unlock(&dev->struct_mutex); > - > - if (ecobus & FORCEWAKE_MT_ENABLE) { > - DRM_DEBUG_KMS("Using MT version of forcewake\n"); > - dev_priv->gt.force_wake_get = > - __gen6_gt_force_wake_mt_get; > - dev_priv->gt.force_wake_put = > - __gen6_gt_force_wake_mt_put; > - } > - } > } > } > Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Pretty sure it was just early, pre-production IVB that didn't use MT, so this should be safe.
On Fri, Oct 19, 2012 at 09:39:59AM -0700, Jesse Barnes wrote: > On Thu, 18 Oct 2012 14:44:35 +0200 > Daniel Vetter <daniel.vetter@ffwll.ch> wrote: > > > Single-threaded forcewake was only used on some early pre-production > > ivybridge machines, all the latest ones should use mt forcewake. And > > we already assume this in other places of the code (e.g. DERRMR > > support in the ddx, or the latest intel_gt_reset patch to reset any > > lingering forcewake references left behind by the bios), so don't > > bother here, too. > > > > Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> > > --- > > drivers/gpu/drm/i915/intel_pm.c | 31 ++++--------------------------- > > 1 file changed, 4 insertions(+), 27 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > > index 2b3cddf..568c98d 100644 > > --- a/drivers/gpu/drm/i915/intel_pm.c > > +++ b/drivers/gpu/drm/i915/intel_pm.c > > @@ -4146,35 +4146,12 @@ void intel_gt_init(struct drm_device *dev) > > if (IS_VALLEYVIEW(dev)) { > > dev_priv->gt.force_wake_get = vlv_force_wake_get; > > dev_priv->gt.force_wake_put = vlv_force_wake_put; > > - } else if (INTEL_INFO(dev)->gen >= 6) { > > + } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { > > + dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get; > > + dev_priv->gt.force_wake_put = __gen6_gt_force_wake_mt_put; > > + } else if (IS_GEN6(dev)) { > > dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get; > > dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put; > > - > > - /* IVB configs may use multi-threaded forcewake */ > > - if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { > > - u32 ecobus; > > - > > - /* A small trick here - if the bios hasn't configured > > - * MT forcewake, and if the device is in RC6, then > > - * force_wake_mt_get will not wake the device and the > > - * ECOBUS read will return zero. Which will be > > - * (correctly) interpreted by the test below as MT > > - * forcewake being disabled. > > - */ > > - mutex_lock(&dev->struct_mutex); > > - __gen6_gt_force_wake_mt_get(dev_priv); > > - ecobus = I915_READ_NOTRACE(ECOBUS); > > - __gen6_gt_force_wake_mt_put(dev_priv); > > - mutex_unlock(&dev->struct_mutex); > > - > > - if (ecobus & FORCEWAKE_MT_ENABLE) { > > - DRM_DEBUG_KMS("Using MT version of forcewake\n"); > > - dev_priv->gt.force_wake_get = > > - __gen6_gt_force_wake_mt_get; > > - dev_priv->gt.force_wake_put = > > - __gen6_gt_force_wake_mt_put; > > - } > > - } > > } > > } > > > > Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Merged, thanks for checking. I've also merged the forcewak clear patch from Chris, somehow forgotten to send the mail. -Daniel
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 2b3cddf..568c98d 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4146,35 +4146,12 @@ void intel_gt_init(struct drm_device *dev) if (IS_VALLEYVIEW(dev)) { dev_priv->gt.force_wake_get = vlv_force_wake_get; dev_priv->gt.force_wake_put = vlv_force_wake_put; - } else if (INTEL_INFO(dev)->gen >= 6) { + } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { + dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get; + dev_priv->gt.force_wake_put = __gen6_gt_force_wake_mt_put; + } else if (IS_GEN6(dev)) { dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get; dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put; - - /* IVB configs may use multi-threaded forcewake */ - if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) { - u32 ecobus; - - /* A small trick here - if the bios hasn't configured - * MT forcewake, and if the device is in RC6, then - * force_wake_mt_get will not wake the device and the - * ECOBUS read will return zero. Which will be - * (correctly) interpreted by the test below as MT - * forcewake being disabled. - */ - mutex_lock(&dev->struct_mutex); - __gen6_gt_force_wake_mt_get(dev_priv); - ecobus = I915_READ_NOTRACE(ECOBUS); - __gen6_gt_force_wake_mt_put(dev_priv); - mutex_unlock(&dev->struct_mutex); - - if (ecobus & FORCEWAKE_MT_ENABLE) { - DRM_DEBUG_KMS("Using MT version of forcewake\n"); - dev_priv->gt.force_wake_get = - __gen6_gt_force_wake_mt_get; - dev_priv->gt.force_wake_put = - __gen6_gt_force_wake_mt_put; - } - } } }
Single-threaded forcewake was only used on some early pre-production ivybridge machines, all the latest ones should use mt forcewake. And we already assume this in other places of the code (e.g. DERRMR support in the ddx, or the latest intel_gt_reset patch to reset any lingering forcewake references left behind by the bios), so don't bother here, too. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> --- drivers/gpu/drm/i915/intel_pm.c | 31 ++++--------------------------- 1 file changed, 4 insertions(+), 27 deletions(-)