drm/i915/tgl: Updated Private PAT programming

Gen12 removes the target-cache and age fields from the private PAT
because MOCS now have the capability to set these itself. Only memory-type
field should be programmed in the ppat, the reminded bits are reserved.

Since now there are only 4 possible combinations, we could set only 4
PPAT and leave the reminded 4 as UC, but I left them as WB as we used
to have before.

Also these registers have been relocated to the 0x4800-0x481c range.

HSDES: 1406402661
BSpec: 31654
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190817093902.2171-33-lucas.demarchi@intel.com

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index e48df11..00d4efc 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2862,6 +2862,19 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
        return 0;
 }
 
+static void tgl_setup_private_ppat(struct drm_i915_private *dev_priv)
+{
+       /* TGL doesn't support LLC or AGE settings */
+       I915_WRITE(GEN12_PAT_INDEX(0), GEN8_PPAT_WB);
+       I915_WRITE(GEN12_PAT_INDEX(1), GEN8_PPAT_WC);
+       I915_WRITE(GEN12_PAT_INDEX(2), GEN8_PPAT_WT);
+       I915_WRITE(GEN12_PAT_INDEX(3), GEN8_PPAT_UC);
+       I915_WRITE(GEN12_PAT_INDEX(4), GEN8_PPAT_WB);
+       I915_WRITE(GEN12_PAT_INDEX(5), GEN8_PPAT_WB);
+       I915_WRITE(GEN12_PAT_INDEX(6), GEN8_PPAT_WB);
+       I915_WRITE(GEN12_PAT_INDEX(7), GEN8_PPAT_WB);
+}
+
 static void cnl_setup_private_ppat(struct drm_i915_private *dev_priv)
 {
        I915_WRITE(GEN10_PAT_INDEX(0), GEN8_PPAT_WB | GEN8_PPAT_LLC);
@@ -2942,7 +2955,9 @@ static void setup_private_pat(struct drm_i915_private *dev_priv)
 {
        GEM_BUG_ON(INTEL_GEN(dev_priv) < 8);
 
-       if (INTEL_GEN(dev_priv) >= 10)
+       if (INTEL_GEN(dev_priv) >= 12)
+               tgl_setup_private_ppat(dev_priv);
+       else if (INTEL_GEN(dev_priv) >= 10)
                cnl_setup_private_ppat(dev_priv);
        else if (IS_CHERRYVIEW(dev_priv) || IS_GEN9_LP(dev_priv))
                chv_setup_private_ppat(dev_priv);

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ea2f0fa..2abd199 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2456,6 +2456,7 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define GEN8_PRIVATE_PAT_LO    _MMIO(0x40e0)
 #define GEN8_PRIVATE_PAT_HI    _MMIO(0x40e0 + 4)
 #define GEN10_PAT_INDEX(index) _MMIO(0x40e0 + (index) * 4)
+#define GEN12_PAT_INDEX(index) _MMIO(0x4800 + (index) * 4)
 #define BSD_HWS_PGA_GEN7       _MMIO(0x04180)
 #define BLT_HWS_PGA_GEN7       _MMIO(0x04280)
 #define VEBOX_HWS_PGA_GEN7     _MMIO(0x04380)