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drm/i915: Write PDEs at init instead of enable 

We won't be calling enable() for all PPGTTs. We do need to write PDEs
for all PPGTTs however. By moving the writing to init (which is called
for all PPGTTs) we should accomplish this.

ADD NOTE ABOUT PDE restore

TODO: Eventually, we should allocate the page tables on demand.

v2: Rebased on BDW. Only do PDEs for pre-gen8

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2013-12-06 14:11:16 -08:00 committed by Daniel Vetter
parent c7c48dfdff
commit 9f273d48aa
1 changed files with 5 additions and 4 deletions
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9
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -631,8 +631,6 @@ static int gen7_ppgtt_enable(struct i915_hw_ppgtt *ppgtt)
uint32_t ecochk, ecobits;
int i;
gen6_write_pdes(ppgtt);
ecobits = I915_READ(GAC_ECO_BITS);
I915_WRITE(GAC_ECO_BITS, ecobits | ECOBITS_PPGTT_CACHE64B);
@ -666,8 +664,6 @@ static int gen6_ppgtt_enable(struct i915_hw_ppgtt *ppgtt)
uint32_t ecochk, gab_ctl, ecobits;
int i;
gen6_write_pdes(ppgtt);
ecobits = I915_READ(GAC_ECO_BITS);
I915_WRITE(GAC_ECO_BITS, ecobits | ECOBITS_SNB_BIT |
ECOBITS_PPGTT_CACHE64B);
@ -906,6 +902,8 @@ int i915_gem_init_ppgtt(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
kref_init(&ppgtt->ref);
drm_mm_init(&ppgtt->base.mm, ppgtt->base.start,
ppgtt->base.total);
if (INTEL_INFO(dev)->gen < 8)
gen6_write_pdes(ppgtt);
}
return ret;
@ -1059,6 +1057,9 @@ void i915_gem_restore_gtt_mappings(struct drm_device *dev)
vma->bind_vma(vma, obj->cache_level, GLOBAL_BIND);
}
if (dev_priv->mm.aliasing_ppgtt)
gen6_write_pdes(dev_priv->mm.aliasing_ppgtt);
i915_gem_chipset_flush(dev);
}