[Intel-gfx] [PATCH 61/67] drm/i915/cnl: Setup PAT Index.

[Rodrigo Vivi]

Different from previous platforms, on CNL+ there's separated
registers for separated indexes.

v2: Remove comments regarding uncertainty around the table.
v3: Remove extra line (by Ben)

Cc: Clint Taylor <clinton.a.taylor at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
Reviewed-by: Ben Widawsky <benjamin.widawsky at intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 26 ++++++++++++++++++++++++--
 drivers/gpu/drm/i915/i915_reg.h     |  1 +
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 3c8457d..95034b0 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2654,6 +2654,24 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
 	return 0;
 }
 
+static void cnl_setup_private_ppat(struct drm_i915_private *dev_priv)
+{
+	/* XXX: spec is unclear if this is still needed for CNL+ */
+	if (!USES_PPGTT(dev_priv)) {
+		I915_WRITE(GEN10_PAT_INDEX(0), GEN8_PPAT_UC);
+		return;
+	}
+
+	I915_WRITE(GEN10_PAT_INDEX(0), GEN8_PPAT_WB | GEN8_PPAT_LLC);
+	I915_WRITE(GEN10_PAT_INDEX(1), GEN8_PPAT_WC | GEN8_PPAT_LLCELLC);
+	I915_WRITE(GEN10_PAT_INDEX(2), GEN8_PPAT_WT | GEN8_PPAT_LLCELLC);
+	I915_WRITE(GEN10_PAT_INDEX(3), GEN8_PPAT_UC);
+	I915_WRITE(GEN10_PAT_INDEX(4), GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0));
+	I915_WRITE(GEN10_PAT_INDEX(5), GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1));
+	I915_WRITE(GEN10_PAT_INDEX(6), GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2));
+	I915_WRITE(GEN10_PAT_INDEX(7), GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3));
+}
+
 /* The GGTT and PPGTT need a private PPAT setup in order to handle cacheability
  * bits. When using advanced contexts each context stores its own PAT, but
  * writing this data shouldn't be harmful even in those cases. */
@@ -2764,7 +2782,9 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt)
 
 	ggtt->base.total = (size / sizeof(gen8_pte_t)) << PAGE_SHIFT;
 
-	if (IS_CHERRYVIEW(dev_priv) || IS_GEN9_LP(dev_priv))
+	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);
 	else
 		bdw_setup_private_ppat(dev_priv);
@@ -3031,7 +3051,9 @@ void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv)
 	ggtt->base.closed = false;
 
 	if (INTEL_GEN(dev_priv) >= 8) {
-		if (IS_CHERRYVIEW(dev_priv) || IS_GEN9_LP(dev_priv))
+		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);
 		else
 			bdw_setup_private_ppat(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 51ffbee..b96de50 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2125,6 +2125,7 @@ enum skl_disp_power_wells {
 #define DONE_REG		_MMIO(0x40b0)
 #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 BSD_HWS_PGA_GEN7	_MMIO(0x04180)
 #define BLT_HWS_PGA_GEN7	_MMIO(0x04280)
 #define VEBOX_HWS_PGA_GEN7	_MMIO(0x04380)
-- 
1.9.1