diff mbox

[0030/1094] drm/i915: Write PDEs at init instead of enable

Message ID 1413889294-31328-31-git-send-email-dheerajx.s.jamwal@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dheeraj Jamwal Oct. 21, 2014, 10:43 a.m. UTC 
From: Ben Widawsky <ben@bwidawsk.net>

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>
(cherry picked from commit 9f273d48aa98cd193b19db9bb4c16bfb81c39052)

Signed-off-by: Dheeraj Jamwal <dheerajx.s.jamwal@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index c2e5dc3..f3973f1 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -633,8 +633,6 @@  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);
 
@@ -668,8 +666,6 @@  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);
@@ -910,6 +906,8 @@  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;
@@ -1063,6 +1061,9 @@  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);
 }