drm/xe: Cleanup some layering in GGTT

xe_ggtt.c touched GuC layers which is incorrect. Call into
xe_gt_tlb_invalidation layer instead.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240222232021.3911545-3-matthew.brost@intel.com

drivers/gpu/drm/xe/regs/xe_guc_regs.h

@@ -110,6 +110,13 @@
 #define MED_VF_SW_FLAG(n)			XE_REG(0x190310 + (n) * 4)
 #define MED_VF_SW_FLAG_COUNT			4
 
+#define GUC_TLB_INV_CR				XE_REG(0xcee8)
+#define   GUC_TLB_INV_CR_INVALIDATE		REG_BIT(0)
+#define PVC_GUC_TLB_INV_DESC0			XE_REG(0xcf7c)
+#define   PVC_GUC_TLB_INV_DESC0_VALID		REG_BIT(0)
+#define PVC_GUC_TLB_INV_DESC1			XE_REG(0xcf80)
+#define   PVC_GUC_TLB_INV_DESC1_INVALIDATE	REG_BIT(6)
+
 /* GuC Interrupt Vector */
 #define GUC_INTR_GUC2HOST			REG_BIT(15)
 #define GUC_INTR_EXEC_ERROR			REG_BIT(14)

drivers/gpu/drm/xe/xe_ggtt.c

@@ -19,7 +19,6 @@
 #include "xe_gt_printk.h"
 #include "xe_gt_tlb_invalidation.h"
 #include "xe_map.h"
-#include "xe_mmio.h"
 #include "xe_sriov.h"
 #include "xe_wopcm.h"
 
@@ -249,15 +248,11 @@ int xe_ggtt_init(struct xe_ggtt *ggtt)
 	return err;
 }
 
-#define GUC_TLB_INV_CR				XE_REG(0xcee8)
-#define   GUC_TLB_INV_CR_INVALIDATE		REG_BIT(0)
-#define PVC_GUC_TLB_INV_DESC0			XE_REG(0xcf7c)
-#define   PVC_GUC_TLB_INV_DESC0_VALID		REG_BIT(0)
-#define PVC_GUC_TLB_INV_DESC1			XE_REG(0xcf80)
-#define   PVC_GUC_TLB_INV_DESC1_INVALIDATE	REG_BIT(6)
-
 static void ggtt_invalidate_gt_tlb(struct xe_gt *gt)
 {
+	struct xe_device *xe = gt_to_xe(gt);
+	int err;
+
 	if (!gt)
 		return;
 
@@ -267,29 +262,9 @@ static void ggtt_invalidate_gt_tlb(struct xe_gt *gt)
 	 * and GuC are accessible.
 	 */
 	xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
-
-	/* TODO: vfunc for GuC vs. non-GuC */
-
-	if (gt->uc.guc.submission_state.enabled) {
-		int seqno;
-
-		seqno = xe_gt_tlb_invalidation_guc(gt);
-		xe_gt_assert(gt, seqno > 0);
-		if (seqno > 0)
-			xe_gt_tlb_invalidation_wait(gt, seqno);
-	} else if (xe_device_uc_enabled(gt_to_xe(gt))) {
-		struct xe_device *xe = gt_to_xe(gt);
-
-		if (xe->info.platform == XE_PVC || GRAPHICS_VER(xe) >= 20) {
-			xe_mmio_write32(gt, PVC_GUC_TLB_INV_DESC1,
-					PVC_GUC_TLB_INV_DESC1_INVALIDATE);
-			xe_mmio_write32(gt, PVC_GUC_TLB_INV_DESC0,
-					PVC_GUC_TLB_INV_DESC0_VALID);
-		} else
-			xe_mmio_write32(gt, GUC_TLB_INV_CR,
-					GUC_TLB_INV_CR_INVALIDATE);
-	}
-
+	err = xe_gt_tlb_invalidation_ggtt(gt);
+	if (err)
+		drm_warn(&xe->drm, "xe_gt_tlb_invalidation_ggtt error=%d", err);
 	xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
 }
 

drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c

@@ -11,7 +11,9 @@
 #include "xe_gt_printk.h"
 #include "xe_guc.h"
 #include "xe_guc_ct.h"
+#include "xe_mmio.h"
 #include "xe_trace.h"
+#include "regs/xe_guc_regs.h"
 
 #define TLB_TIMEOUT	(HZ / 4)
 
@@ -210,7 +212,7 @@ static int send_tlb_invalidation(struct xe_guc *guc,
  * Return: Seqno which can be passed to xe_gt_tlb_invalidation_wait on success,
  * negative error code on error.
  */
-int xe_gt_tlb_invalidation_guc(struct xe_gt *gt)
+static int xe_gt_tlb_invalidation_guc(struct xe_gt *gt)
 {
 	u32 action[] = {
 		XE_GUC_ACTION_TLB_INVALIDATION,
@@ -222,6 +224,43 @@ int xe_gt_tlb_invalidation_guc(struct xe_gt *gt)
 				     ARRAY_SIZE(action));
 }
 
+/**
+ * xe_gt_tlb_invalidation_ggtt - Issue a TLB invalidation on this GT for the GGTT
+ * @gt: graphics tile
+ *
+ * Issue a TLB invalidation for the GGTT. Completion of TLB invalidation is
+ * synchronous.
+ *
+ * Return: 0 on success, negative error code on error
+ */
+int xe_gt_tlb_invalidation_ggtt(struct xe_gt *gt)
+{
+	struct xe_device *xe = gt_to_xe(gt);
+
+	if (xe_guc_ct_enabled(&gt->uc.guc.ct) &&
+	    gt->uc.guc.submission_state.enabled) {
+		int seqno;
+
+		seqno = xe_gt_tlb_invalidation_guc(gt);
+		if (seqno <= 0)
+			return seqno;
+
+		xe_gt_tlb_invalidation_wait(gt, seqno);
+	} else if (xe_device_uc_enabled(xe)) {
+		if (xe->info.platform == XE_PVC || GRAPHICS_VER(xe) >= 20) {
+			xe_mmio_write32(gt, PVC_GUC_TLB_INV_DESC1,
+					PVC_GUC_TLB_INV_DESC1_INVALIDATE);
+			xe_mmio_write32(gt, PVC_GUC_TLB_INV_DESC0,
+					PVC_GUC_TLB_INV_DESC0_VALID);
+		} else {
+			xe_mmio_write32(gt, GUC_TLB_INV_CR,
+					GUC_TLB_INV_CR_INVALIDATE);
+		}
+	}
+
+	return 0;
+}
+
 /**
  * xe_gt_tlb_invalidation_vma - Issue a TLB invalidation on this GT for a VMA
  * @gt: graphics tile

drivers/gpu/drm/xe/xe_gt_tlb_invalidation.h

@@ -16,7 +16,7 @@ struct xe_vma;
 
 int xe_gt_tlb_invalidation_init(struct xe_gt *gt);
 void xe_gt_tlb_invalidation_reset(struct xe_gt *gt);
-int xe_gt_tlb_invalidation_guc(struct xe_gt *gt);
+int xe_gt_tlb_invalidation_ggtt(struct xe_gt *gt);
 int xe_gt_tlb_invalidation_vma(struct xe_gt *gt,
 			       struct xe_gt_tlb_invalidation_fence *fence,
 			       struct xe_vma *vma);