[PATCH 3/6] drm/i915: Add a separate low-level helper for masked workarounds

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

We distinguish masked registers from other workarounds by the mask (clr)
being zero for the former.

To avoid callers of the low-level wa_add having to know that, and be
passing this zero explicitly, add a wa_masked_add low-level helper
which embeds this knowledge.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 56 +++++++++++++--------
 1 file changed, 34 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 62cb9ee5bfc3..a7abf9ca78ec 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -162,6 +162,18 @@ static void wa_add(struct i915_wa_list *wal, i915_reg_t reg,
 	_wa_add(wal, &wa);
 }
 
+static void wa_masked_add(struct i915_wa_list *wal, i915_reg_t reg,
+			  u32 set, u32 read_mask)
+{
+	struct i915_wa wa = {
+		.reg  = reg,
+		.set  = set,
+		.read = read_mask,
+	};
+
+	_wa_add(wal, &wa);
+}
+
 static void
 wa_write_clr_set(struct i915_wa_list *wal, i915_reg_t reg, u32 clear, u32 set)
 {
@@ -200,20 +212,20 @@ wa_write_clr(struct i915_wa_list *wal, i915_reg_t reg, u32 clr)
 static void
 wa_masked_en(struct i915_wa_list *wal, i915_reg_t reg, u32 val)
 {
-	wa_add(wal, reg, 0, _MASKED_BIT_ENABLE(val), val);
+	wa_masked_add(wal, reg, _MASKED_BIT_ENABLE(val), val);
 }
 
 static void
 wa_masked_dis(struct i915_wa_list *wal, i915_reg_t reg, u32 val)
 {
-	wa_add(wal, reg, 0, _MASKED_BIT_DISABLE(val), val);
+	wa_masked_add(wal, reg, _MASKED_BIT_DISABLE(val), val);
 }
 
 static void
 wa_masked_field_set(struct i915_wa_list *wal, i915_reg_t reg,
 		    u32 mask, u32 val)
 {
-	wa_add(wal, reg, 0, _MASKED_FIELD(mask, val), mask);
+	wa_masked_add(wal, reg, _MASKED_FIELD(mask, val), mask);
 }
 
 static void gen6_ctx_workarounds_init(struct intel_engine_cs *engine,
@@ -836,10 +848,10 @@ hsw_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
 	/* L3 caching of data atomics doesn't work -- disable it. */
 	wa_write(wal, HSW_SCRATCH1, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE);
 
-	wa_add(wal,
-	       HSW_ROW_CHICKEN3, 0,
-	       _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE),
-		0 /* XXX does this reg exist? */);
+	wa_masked_add(wal,
+		      HSW_ROW_CHICKEN3,
+		      _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE),
+		      0 /* XXX does this reg exist? */);
 
 	/* WaVSRefCountFullforceMissDisable:hsw */
 	wa_write_clr(wal, GEN7_FF_THREAD_MODE, GEN7_FF_VS_REF_CNT_FFME);
@@ -1947,10 +1959,10 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 		 * disable bit, which we don't touch here, but it's good
 		 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
 		 */
-		wa_add(wal, GEN7_GT_MODE, 0,
-		       _MASKED_FIELD(GEN6_WIZ_HASHING_MASK,
-				     GEN6_WIZ_HASHING_16x4),
-		       GEN6_WIZ_HASHING_16x4);
+		wa_masked_field_set(wal,
+				    GEN7_GT_MODE,
+				    GEN6_WIZ_HASHING_MASK,
+				    GEN6_WIZ_HASHING_16x4);
 	}
 
 	if (IS_GEN_RANGE(i915, 6, 7))
@@ -2000,10 +2012,10 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 		 * disable bit, which we don't touch here, but it's good
 		 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
 		 */
-		wa_add(wal,
-		       GEN6_GT_MODE, 0,
-		       _MASKED_FIELD(GEN6_WIZ_HASHING_MASK, GEN6_WIZ_HASHING_16x4),
-		       GEN6_WIZ_HASHING_16x4);
+		wa_masked_field_set(wal,
+				    GEN6_GT_MODE,
+				    GEN6_WIZ_HASHING_MASK,
+				    GEN6_WIZ_HASHING_16x4);
 
 		/* WaDisable_RenderCache_OperationalFlush:snb */
 		wa_masked_dis(wal, CACHE_MODE_0, RC_OP_FLUSH_ENABLE);
@@ -2021,10 +2033,10 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 
 	if (IS_GEN_RANGE(i915, 4, 6))
 		/* WaTimedSingleVertexDispatch:cl,bw,ctg,elk,ilk,snb */
-		wa_add(wal, MI_MODE,
-		       0, _MASKED_BIT_ENABLE(VS_TIMER_DISPATCH),
-		       /* XXX bit doesn't stick on Broadwater */
-		       IS_I965G(i915) ? 0 : VS_TIMER_DISPATCH);
+		wa_masked_add(wal, MI_MODE,
+			      _MASKED_BIT_ENABLE(VS_TIMER_DISPATCH),
+			      /* XXX bit doesn't stick on Broadwater */
+			      IS_I965G(i915) ? 0 : VS_TIMER_DISPATCH);
 
 	if (IS_GEN(i915, 4))
 		/*
@@ -2037,9 +2049,9 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 		 * they are already accustomed to from before contexts were
 		 * enabled.
 		 */
-		wa_add(wal, ECOSKPD,
-		       0, _MASKED_BIT_ENABLE(ECO_CONSTANT_BUFFER_SR_DISABLE),
-		       0 /* XXX bit doesn't stick on Broadwater */);
+		wa_masked_add(wal, ECOSKPD,
+			      _MASKED_BIT_ENABLE(ECO_CONSTANT_BUFFER_SR_DISABLE),
+			      0 /* XXX bit doesn't stick on Broadwater */);
 }
 
 static void
-- 
2.30.2