[PATCH v3 8/8] drm/xe/xelp: Add Wa_18022495364

[Tvrtko Ursulin]

Add Wa_18022495364 as a context workaround batch buffer workaround.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at igalia.com>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/xe/regs/xe_engine_regs.h |  3 +++
 drivers/gpu/drm/xe/xe_lrc.c              | 21 +++++++++++++++++++++
 drivers/gpu/drm/xe/xe_wa_oob.rules       |  1 +
 3 files changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/xe/regs/xe_engine_regs.h b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
index 7ade41e2b7b3..f4c3e1187a00 100644
--- a/drivers/gpu/drm/xe/regs/xe_engine_regs.h
+++ b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
@@ -111,6 +111,9 @@
 #define   PPHWSP_CSB_AND_TIMESTAMP_REPORT_DIS	REG_BIT(14)
 #define   CS_PRIORITY_MEM_READ			REG_BIT(7)
 
+#define CS_DEBUG_MODE2(base)			XE_REG((base) + 0xd8, XE_REG_OPTION_MASKED)
+#define   INSTRUCTION_STATE_CACHE_INVALIDATE	REG_BIT(6)
+
 #define FF_SLICE_CS_CHICKEN1(base)		XE_REG((base) + 0xe0, XE_REG_OPTION_MASKED)
 #define   FFSC_PERCTX_PREEMPT_CTRL		REG_BIT(14)
 
diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c
index 6c3f6fab465a..53ac54f77691 100644
--- a/drivers/gpu/drm/xe/xe_lrc.c
+++ b/drivers/gpu/drm/xe/xe_lrc.c
@@ -1021,6 +1021,26 @@ xelp_emit_timestamp_wa(struct xe_lrc *lrc, struct xe_hw_engine *hwe,
 	return cmd - batch;
 }
 
+static ssize_t
+xelp_invalidate_state_cache(struct xe_lrc *lrc, struct xe_hw_engine *hwe,
+			    u32 *batch, size_t max_len)
+{
+	u32 *cmd = batch;
+
+	if (!XE_WA(lrc->gt, 18022495364) ||
+	    hwe->class != XE_ENGINE_CLASS_RENDER)
+		return 0;
+
+	if (xe_gt_WARN_ON(lrc->gt, max_len < 3))
+		return -ENOSPC;
+
+	*cmd++ = MI_LOAD_REGISTER_IMM | MI_LRI_NUM_REGS(1);
+	*cmd++ = CS_DEBUG_MODE1(0).addr;
+	*cmd++ = _MASKED_BIT_ENABLE(INSTRUCTION_STATE_CACHE_INVALIDATE);
+
+	return cmd - batch;
+}
+
 struct wa_bo_setup {
 	ssize_t (*setup)(struct xe_lrc *lrc, struct xe_hw_engine *hwe,
 			 u32 *batch, size_t max_size);
@@ -1097,6 +1117,7 @@ static int setup_wa_bb(struct xe_lrc *lrc, struct xe_hw_engine *hwe)
 {
 	static const struct wa_bo_setup funcs[] = {
 		{ .setup = xelp_emit_timestamp_wa },
+		{ .setup = xelp_invalidate_state_cache },
 		{ .setup = wa_bb_setup_utilization },
 	};
 	unsigned int written = 0;
diff --git a/drivers/gpu/drm/xe/xe_wa_oob.rules b/drivers/gpu/drm/xe/xe_wa_oob.rules
index e88398ac3da9..8b7f1495cc78 100644
--- a/drivers/gpu/drm/xe/xe_wa_oob.rules
+++ b/drivers/gpu/drm/xe/xe_wa_oob.rules
@@ -1,5 +1,6 @@
 1607983814	GRAPHICS_VERSION_RANGE(1200, 1210)
 16010904313	GRAPHICS_VERSION_RANGE(1200, 1210)
+18022495364	GRAPHICS_VERSION_RANGE(1200, 1210)
 22012773006	GRAPHICS_VERSION_RANGE(1200, 1250)
 14014475959	GRAPHICS_VERSION_RANGE(1270, 1271), GRAPHICS_STEP(A0, B0)
 		PLATFORM(DG2)
-- 
2.48.0