[Intel-gfx] [PATCH v6 32/32] drm/i915/bdw: Flip the 48b switch

[Michel Thierry]

Use 48b addresses if hw supports it and i915.enable_ppgtt=3.

Aliasing PPGTT remains 32b only.

Signed-off-by: Michel Thierry <michel.thierry at intel.com>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 7 ++-----
 drivers/gpu/drm/i915/i915_params.c  | 2 +-
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 842ce93..fda5907 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -107,7 +107,7 @@ static int sanitize_enable_ppgtt(struct drm_device *dev, int enable_ppgtt)
 
 #ifdef CONFIG_64BIT
 	has_full_64bit_ppgtt = IS_BROADWELL(dev) ||
-				INTEL_INFO(dev)->gen >= 9 && false; /* FIXME: 64b */
+				INTEL_INFO(dev)->gen >= 9;
 #else
 	has_full_64bit_ppgtt = false;
 #endif
@@ -1076,9 +1076,6 @@ static int gen8_ppgtt_alloc_page_directories(struct i915_address_space *vm,
 
 	BUG_ON(!bitmap_empty(new_pds, pdpes));
 
-	/* FIXME: PPGTT container_of won't work for 64b */
-	BUG_ON((start + length) > 0x800000000ULL);
-
 	gen8_for_each_pdpe(pd, pdp, start, length, temp, pdpe) {
 		if (pd)
 			continue;
@@ -1397,7 +1394,7 @@ static int gen8_aliasing_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
 {
 	struct drm_device *dev = ppgtt->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct i915_page_directory_pointer_entry *pdp = &ppgtt->pdp; /* FIXME: 48b */
+	struct i915_page_directory_pointer_entry *pdp = &ppgtt->pdp; /* FIXME: 48b? */
 	struct i915_page_directory_entry *pd;
 	uint64_t temp, start = 0, size = dev_priv->gtt.base.total;
 	uint32_t pdpe;
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 44f2262..1cd43b0 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -119,7 +119,7 @@ MODULE_PARM_DESC(enable_hangcheck,
 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
 MODULE_PARM_DESC(enable_ppgtt,
 	"Override PPGTT usage. "
-	"(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
+	"(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full_64b)");
 
 module_param_named(enable_execlists, i915.enable_execlists, int, 0400);
 MODULE_PARM_DESC(enable_execlists,
-- 
2.1.1