[PATCH v4 18/18] drm/i915/gen8: Flip the 48b switch

Michel Thierry
2015-07-07T15:15:26Z

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

Note, aliasing PPGTT remains 32b only.

Signed-off-by: Michel Thierry <michel.thierry@intel.com>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 4 ++--
drivers/gpu/drm/i915/i915_params.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 900bce6..097ec5b 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -110,7 +110,7 @@ static int sanitize_enable_ppgtt(struct drm_device *dev, int enable_ppgtt)
has_full_ppgtt = INTEL_INFO(dev)->gen >= 7;
has_full_64bit_ppgtt = IS_ENABLED(CONFIG_X86_64) &&
(IS_BROADWELL(dev) ||
- INTEL_INFO(dev)->gen >= 9) && false; /* FIXME: 64b */
+ INTEL_INFO(dev)->gen >= 9);

if (intel_vgpu_active(dev))
has_full_ppgtt = false; /* emulation is too hard */
@@ -148,7 +148,7 @@ static int sanitize_enable_ppgtt(struct drm_device *dev, int enable_ppgtt)
}

if (INTEL_INFO(dev)->gen >= 8 && i915.enable_execlists)
- return 2;
+ return has_full_64bit_ppgtt ? 3 : 2;
else
return has_aliasing_ppgtt ? 1 : 0;
}
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 7983fe4..ccf3eb2 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -110,7 +110,7 @@ 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,
--
2.4.5