diff mbox

[RFC,07/11] drm/i915: Save all Whitelist WAs and apply them at a later time

Message ID 1507582707-20079-8-git-send-email-oscar.mateo@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

oscar.mateo@intel.com Oct. 9, 2017, 8:58 p.m. UTC 
Same as we have been doing for other types, this allow us to dump
the whole list of workarounds to debugs, for validation purposes.

Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c     |   2 +-
 drivers/gpu/drm/i915/i915_drv.h         |   3 +-
 drivers/gpu/drm/i915/i915_workarounds.c | 113 ++++++++++++++++----------------
 drivers/gpu/drm/i915/i915_workarounds.h |   3 +-
 drivers/gpu/drm/i915/intel_lrc.c        |   8 ++-
 5 files changed, 67 insertions(+), 62 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index a204896..bfb0648 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3560,7 +3560,7 @@  static int i915_wa_registers(struct seq_file *m, void *unused)
 	seq_printf(m, "Context workarounds applied: %d\n", workarounds->ctx_wa_count);
 	for_each_engine(engine, dev_priv, id)
 		seq_printf(m, "HW whitelist count for %s: %d\n",
-			   engine->name, workarounds->hw_whitelist_count[id]);
+			   engine->name, workarounds->whitelist_wa_count[id]);
 	for (i = 0; i < workarounds->ctx_wa_count; ++i) {
 		i915_reg_t addr;
 		u32 mask, value, read;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b042078..9359231 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1964,7 +1964,8 @@  struct i915_workarounds {
 	struct i915_wa_reg mmio_wa_reg[I915_MAX_MMIO_WA_REGS];
 	u32 mmio_wa_count;
 
-	u32 hw_whitelist_count[I915_NUM_ENGINES];
+	struct i915_wa_reg whitelist_wa_reg[I915_NUM_ENGINES][RING_MAX_NONPRIV_SLOTS];
+	u32 whitelist_wa_count[I915_NUM_ENGINES];
 };
 
 struct i915_virtual_gpu {
diff --git a/drivers/gpu/drm/i915/i915_workarounds.c b/drivers/gpu/drm/i915/i915_workarounds.c
index 7f9e66a..5f7eb7a 100644
--- a/drivers/gpu/drm/i915/i915_workarounds.c
+++ b/drivers/gpu/drm/i915/i915_workarounds.c
@@ -869,64 +869,64 @@  void i915_mmio_workarounds_apply(struct drm_i915_private *dev_priv)
 	}
 }
 
-static int wa_ring_whitelist_reg(struct intel_engine_cs *engine,
-				 i915_reg_t reg)
+static int whitelist_wa_add(struct intel_engine_cs *engine,
+			    i915_reg_t reg)
 {
 	struct drm_i915_private *dev_priv = engine->i915;
 	struct i915_workarounds *wa = &dev_priv->workarounds;
-	const uint32_t index = wa->hw_whitelist_count[engine->id];
+	const uint32_t index = wa->whitelist_wa_count[engine->id];
 
 	if (WARN_ON(index >= RING_MAX_NONPRIV_SLOTS))
 		return -EINVAL;
 
-	I915_WRITE(RING_FORCE_TO_NONPRIV(engine->mmio_base, index),
-		   i915_mmio_reg_offset(reg));
-	wa->hw_whitelist_count[engine->id]++;
+	wa->whitelist_wa_reg[engine->id][index].addr =
+		RING_FORCE_TO_NONPRIV(engine->mmio_base, index);
+	wa->whitelist_wa_reg[engine->id][index].value = i915_mmio_reg_offset(reg);
+	wa->whitelist_wa_reg[engine->id][index].mask = 0xffffffff;
+
+	wa->whitelist_wa_count[engine->id]++;
 
 	return 0;
 }
 
-static int gen9_whitelist_workarounds_apply(struct intel_engine_cs *engine)
-{
-	int ret;
+#define WHITELISTWA_REG(engine, reg) do { \
+	const int r = whitelist_wa_add(engine, reg); \
+	if (r) \
+		return r; \
+} while (0)
 
+static int gen9_whitelist_workarounds_init(struct intel_engine_cs *engine)
+{
 	/* WaVFEStateAfterPipeControlwithMediaStateClear:skl,bxt,glk,cfl */
-	ret = wa_ring_whitelist_reg(engine, GEN9_CTX_PREEMPT_REG);
-	if (ret)
-		return ret;
+	WHITELISTWA_REG(engine, GEN9_CTX_PREEMPT_REG);
 
 	/* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl,cfl,[cnl] */
-	ret = wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1);
-	if (ret)
-		return ret;
+	WHITELISTWA_REG(engine, GEN8_CS_CHICKEN1);
 
 	/* WaAllowUMDToModifyHDCChicken1:skl,bxt,kbl,glk,cfl */
-	ret = wa_ring_whitelist_reg(engine, GEN8_HDC_CHICKEN1);
-	if (ret)
-		return ret;
+	WHITELISTWA_REG(engine, GEN8_HDC_CHICKEN1);
 
 	return 0;
 }
 
-static int skl_whitelist_workarounds_apply(struct intel_engine_cs *engine)
+static int skl_whitelist_workarounds_init(struct intel_engine_cs *engine)
 {
-	int ret = gen9_whitelist_workarounds_apply(engine);
+	int ret = gen9_whitelist_workarounds_init(engine);
 	if (ret)
 		return ret;
 
 	/* WaDisableLSQCROPERFforOCL:skl */
-	ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4);
-	if (ret)
-		return ret;
+	WHITELISTWA_REG(engine, GEN8_L3SQCREG4);
 
 	return 0;
 }
 
-static int bxt_whitelist_workarounds_apply(struct intel_engine_cs *engine)
+static int bxt_whitelist_workarounds_init(struct intel_engine_cs *engine)
 {
 	struct drm_i915_private *dev_priv = engine->i915;
+	int ret;
 
-	int ret = gen9_whitelist_workarounds_apply(engine);
+	ret = gen9_whitelist_workarounds_init(engine);
 	if (ret)
 		return ret;
 
@@ -935,89 +935,90 @@  static int bxt_whitelist_workarounds_apply(struct intel_engine_cs *engine)
 	/* WaDisableObjectLevelPreemtionForInstanceId:bxt */
 	/* WaDisableLSQCROPERFforOCL:bxt */
 	if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) {
-		ret = wa_ring_whitelist_reg(engine, GEN9_CS_DEBUG_MODE1);
-		if (ret)
-			return ret;
-
-		ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4);
-		if (ret)
-			return ret;
+		WHITELISTWA_REG(engine, GEN9_CS_DEBUG_MODE1);
+		WHITELISTWA_REG(engine, GEN8_L3SQCREG4);
 	}
 
 	return 0;
 }
 
-static int kbl_whitelist_workarounds_apply(struct intel_engine_cs *engine)
+static int kbl_whitelist_workarounds_init(struct intel_engine_cs *engine)
 {
-	int ret = gen9_whitelist_workarounds_apply(engine);
+	int ret = gen9_whitelist_workarounds_init(engine);
 	if (ret)
 		return ret;
 
 	/* WaDisableLSQCROPERFforOCL:kbl */
-	ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4);
-	if (ret)
-		return ret;
+	WHITELISTWA_REG(engine, GEN8_L3SQCREG4);
 
 	return 0;
 }
 
-static int glk_whitelist_workarounds_apply(struct intel_engine_cs *engine)
+static int glk_whitelist_workarounds_init(struct intel_engine_cs *engine)
 {
-	int ret = gen9_whitelist_workarounds_apply(engine);
+	int ret = gen9_whitelist_workarounds_init(engine);
 	if (ret)
 		return ret;
 
 	return 0;
 }
 
-static int cfl_whitelist_workarounds_apply(struct intel_engine_cs *engine)
+static int cfl_whitelist_workarounds_init(struct intel_engine_cs *engine)
 {
-	int ret = gen9_whitelist_workarounds_apply(engine);
+	int ret = gen9_whitelist_workarounds_init(engine);
 	if (ret)
 		return ret;
 
 	return 0;
 }
 
-static int cnl_whitelist_workarounds_apply(struct intel_engine_cs *engine)
+static int cnl_whitelist_workarounds_init(struct intel_engine_cs *engine)
 {
-	int ret;
-
 	/* WaEnablePreemptionGranularityControlByUMD:cnl */
-	ret = wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1);
-	if (ret)
-		return ret;
+	WHITELISTWA_REG(engine, GEN8_CS_CHICKEN1);
 
 	return 0;
 }
 
-int i915_whitelist_workarounds_apply(struct intel_engine_cs *engine)
+int i915_whitelist_workarounds_init(struct intel_engine_cs *engine)
 {
 	struct drm_i915_private *dev_priv = engine->i915;
 	int err;
 
 	WARN_ON(engine->id != RCS);
 
-	dev_priv->workarounds.hw_whitelist_count[engine->id] = 0;
+	dev_priv->workarounds.whitelist_wa_count[engine->id] = 0;
 
 	if (IS_SKYLAKE(dev_priv))
-		err = skl_whitelist_workarounds_apply(engine);
+		err = skl_whitelist_workarounds_init(engine);
 	else if (IS_BROXTON(dev_priv))
-		err = bxt_whitelist_workarounds_apply(engine);
+		err = bxt_whitelist_workarounds_init(engine);
 	else if (IS_KABYLAKE(dev_priv))
-		err = kbl_whitelist_workarounds_apply(engine);
+		err = kbl_whitelist_workarounds_init(engine);
 	else if (IS_GEMINILAKE(dev_priv))
-		err = glk_whitelist_workarounds_apply(engine);
+		err = glk_whitelist_workarounds_init(engine);
 	else if (IS_COFFEELAKE(dev_priv))
-		err = cfl_whitelist_workarounds_apply(engine);
+		err = cfl_whitelist_workarounds_init(engine);
 	else if (IS_CANNONLAKE(dev_priv))
-		err = cnl_whitelist_workarounds_apply(engine);
+		err = cnl_whitelist_workarounds_init(engine);
 	else
 		err = 0;
 	if (err)
 		return err;
 
 	DRM_DEBUG_DRIVER("%s: Number of whitelist w/a: %d\n", engine->name,
-			 dev_priv->workarounds.hw_whitelist_count[engine->id]);
+			 dev_priv->workarounds.whitelist_wa_count[engine->id]);
 	return 0;
 }
+
+void i915_whitelist_workarounds_apply(struct intel_engine_cs *engine)
+{
+	struct drm_i915_private *dev_priv = engine->i915;
+	struct i915_workarounds *w = &dev_priv->workarounds;
+	int i;
+
+	for (i = 0; i < w->whitelist_wa_count[engine->id]; i++) {
+		I915_WRITE(w->whitelist_wa_reg[engine->id][i].addr,
+			   w->whitelist_wa_reg[engine->id][i].value);
+	}
+}
diff --git a/drivers/gpu/drm/i915/i915_workarounds.h b/drivers/gpu/drm/i915/i915_workarounds.h
index 1ffe13a..805d246 100644
--- a/drivers/gpu/drm/i915/i915_workarounds.h
+++ b/drivers/gpu/drm/i915/i915_workarounds.h
@@ -31,6 +31,7 @@ 
 int i915_mmio_workarounds_init(struct drm_i915_private *dev_priv);
 void i915_mmio_workarounds_apply(struct drm_i915_private *dev_priv);
 
-int i915_whitelist_workarounds_apply(struct intel_engine_cs *engine);
+int i915_whitelist_workarounds_init(struct intel_engine_cs *engine);
+void i915_whitelist_workarounds_apply(struct intel_engine_cs *engine);
 
 #endif
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 4816dd6..0fe0f3e 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1499,9 +1499,7 @@  static int gen9_init_render_ring(struct intel_engine_cs *engine)
 	if (ret)
 		return ret;
 
-	ret = i915_whitelist_workarounds_apply(engine);
-	if (ret)
-		return ret;
+	i915_whitelist_workarounds_apply(engine);
 
 	return 0;
 }
@@ -1988,6 +1986,10 @@  int logical_render_ring_init(struct intel_engine_cs *engine)
 	if (ret)
 		return ret;
 
+	ret = i915_whitelist_workarounds_init(engine);
+	if (ret)
+		return ret;
+
 	ret = intel_init_workaround_bb(engine);
 	if (ret) {
 		/*