On Fri, Sep 12, 2014 at 12:23:14PM +0300, Ville Syrjälä wrote:
> On Thu, Sep 11, 2014 at 01:28:29PM +0200, Daniel Vetter wrote:
> > Based upon a patch from Deepak, but reworked to only apply on gen7+
> > and with the logic a bit clarified.
> >
> > Cc: Deepak S <deepak.s@xxxxxxxxx>
> > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
>
> > ---
> > drivers/gpu/drm/i915/i915_gem_stolen.c | 13 +++++++++++--
> > drivers/gpu/drm/i915/i915_reg.h | 8 ++++++++
> > 2 files changed, 19 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
> > index 21c025a209c0..15d42b3e2029 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_stolen.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
> > @@ -289,6 +289,7 @@ void i915_gem_cleanup_stolen(struct drm_device *dev)
> > int i915_gem_init_stolen(struct drm_device *dev)
> > {
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > + u32 tmp;
> > int bios_reserved = 0;
> >
> > #ifdef CONFIG_INTEL_IOMMU
> > @@ -308,8 +309,16 @@ int i915_gem_init_stolen(struct drm_device *dev)
> > DRM_DEBUG_KMS("found %zd bytes of stolen memory at %08lx\n",
> > dev_priv->gtt.stolen_size, dev_priv->mm.stolen_base);
> >
> > - if (IS_VALLEYVIEW(dev))
> > - bios_reserved = 1024*1024; /* top 1M on VLV/BYT */
> > + if (INTEL_INFO(dev)->gen >= 8) {
> > + tmp = I915_READ(GEN7_BIOS_RESERVED);
> > + tmp >>= GEN8_BIOS_RESERVED_SHIFT;
> > + tmp &= GEN8_BIOS_RESERVED_SHIFT;
> ^^^^^
> MASK
Oops, thanks for spotting this.
>
> The docs are a bit confusing on this topic, but othwewise this seems
> to be OK wrt. most of the docs.
>
> So with that one thing fixed:
> Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Queued for -next, thanks for the review.
-Daniel
>
>
> > + bios_reserved = (1024*1024) << tmp;
> > + } else if (IS_GEN7(dev)) {
> > + tmp = I915_READ(GEN7_BIOS_RESERVED);
> > + bios_reserved = tmp & GEN7_BIOS_RESERVED_256K ?
> > + 256*1024 : 1024*1024;
> > + }
> >
> > if (WARN_ON(bios_reserved > dev_priv->gtt.stolen_size))
> > return 0;
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> > index 15c0eaa9f97f..eb1430974a9a 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -143,6 +143,14 @@
> > #define GAB_CTL 0x24000
> > #define GAB_CTL_CONT_AFTER_PAGEFAULT (1<<8)
> >
> > +#define GEN7_BIOS_RESERVED 0x1082C0
> > +#define GEN7_BIOS_RESERVED_1M (0 << 5)
> > +#define GEN7_BIOS_RESERVED_256K (1 << 5)
> > +#define GEN8_BIOS_RESERVED_SHIFT 7
> > +#define GEN7_BIOS_RESERVED_MASK 0x1
> > +#define GEN8_BIOS_RESERVED_MASK 0x3
> > +
> > +
> > /* VGA stuff */
> >
> > #define VGA_ST01_MDA 0x3ba
> > --
> > 2.0.1
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Ville Syrjälä
> Intel OTC
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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