[PATCH 04/22] drm/i915/icl: WaL3BankAddressHashing

[Oscar Mateo <oscar.mateo@intel.com>]

Revert to an L3 non-hash model, for performance reasons.

v2:
  - Place the WA name above the actual change
  - Improve the register naming
v3:
  - Rebased
  - Renamed to Wa_1604223664
v4: Rebased on top of the WA refactoring
v5:
  - Added References (Mika)
  - Fixed wrong mask and value (Mika)
  - Do not apply together with another WA for the same
    register (not worth the hassle)

References: HSDES#1604223664
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h          |  6 ++++++
 drivers/gpu/drm/i915/intel_workarounds.c | 10 ++++++++++
 2 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 0671066..62c4fd2 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8253,6 +8253,12 @@ enum {
 #define GEN8_GARBCNTL				_MMIO(0xB004)
 #define   GEN9_GAPS_TSV_CREDIT_DISABLE		(1 << 7)
 #define   GEN11_ARBITRATION_PRIO_ORDER_MASK	(0x3f << 22)
+#define   GEN11_HASH_CTRL_EXCL_MASK		(0x7f << 0)
+#define   GEN11_HASH_CTRL_EXCL_BIT0		(1 << 0)
+
+#define GEN11_GLBLINVL				_MMIO(0xB404)
+#define   GEN11_BANK_HASH_ADDR_EXCL_MASK	(0x7f << 5)
+#define   GEN11_BANK_HASH_ADDR_EXCL_BIT0	(1 << 5)
 
 #define GEN10_DFR_RATIO_EN_AND_CHICKEN	_MMIO(0x9550)
 #define   DFR_DISABLE			(1 << 9)
diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
index 68e6caa..93591a0 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -705,6 +705,16 @@ static void icl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
 	 */
 	I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) |
 				   GEN11_ARBITRATION_PRIO_ORDER_MASK));
+
+	/* Wa_1604223664:icl
+	 * Formerly known as WaL3BankAddressHashing
+	 */
+	I915_WRITE(GEN8_GARBCNTL,
+		   ((I915_READ(GEN8_GARBCNTL) & ~GEN11_HASH_CTRL_EXCL_MASK) |
+		    GEN11_HASH_CTRL_EXCL_BIT0));
+	I915_WRITE(GEN11_GLBLINVL,
+		   ((I915_READ(GEN11_GLBLINVL) & ~GEN11_BANK_HASH_ADDR_EXCL_MASK) |
+		    GEN11_BANK_HASH_ADDR_EXCL_BIT0));
 }
 
 void intel_gt_workarounds_apply(struct drm_i915_private *dev_priv)
-- 
1.9.1

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