On Thu, 11 Oct 2012 11:43:53 -0700 Jesse Barnes <[email protected]> wrote:
> On Tue, 4 Sep 2012 21:03:01 +0100 > Chris Wilson <[email protected]> wrote: > > > A few of the earlier registers where enlarged and so the Base Data of > > Stolem Memory Register (BDSM) was pushed to 0xb0. > > > > Signed-off-by: Chris Wilson <[email protected]> > > --- > > drivers/gpu/drm/i915/i915_gem_stolen.c | 9 ++++++++- > > 1 file changed, 8 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c > > b/drivers/gpu/drm/i915/i915_gem_stolen.c > > index a01ff74..a528e4a 100644 > > --- a/drivers/gpu/drm/i915/i915_gem_stolen.c > > +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c > > @@ -63,7 +63,11 @@ static unsigned long i915_stolen_to_physical(struct > > drm_device *dev) > > * its value of TOLUD. > > */ > > base = 0; > > - if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) { > > + if (INTEL_INFO(dev)->gen >= 6) { > > + /* Read Base Data of Stolen Memory Register (BDSM) directly */ > > + pci_read_config_dword(pdev, 0xB0, &base); > > + base &= ~4095; /* lower bits used for locking register */ > > + } else if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) { > > /* Read Graphics Base of Stolen Memory directly */ > > pci_read_config_dword(pdev, 0xA4, &base); > > #if 0 > > @@ -172,6 +176,9 @@ int i915_gem_init_stolen(struct drm_device *dev) > > if (dev_priv->mm.stolen_base == 0) > > return 0; > > > > + DRM_DEBUG_KMS("found %d bytes of stolen memory at %08lx\n", > > + dev_priv->mm.gtt->stolen_size, dev_priv->mm.stolen_base); > > + > > /* Basic memrange allocator for stolen space */ > > drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size); > > > > A bit scary we've had this around so long? And now I can't find docs > for this... Assuming it tests out ok though: > > Reviewed-by: Jesse Barnes <[email protected]> Ok finally found this in the device 0 docs. 0xb0 is correct. However, I think we could use the MCHBAR mirror of this too at 0x1080c0 or the device 2 config space register 0x5c instead if we wanted. -- Jesse Barnes, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
