drm/xe: add new type to RTP context

Prepare the RTP context to be used before GT init. Add the xe device as
a type, put WARN_ONs to protect existing RTP_MATCHes.

v5: split out into separate patch, change definition order
v6: catch missing cases for checking gt init

Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Matt Atwood <matthew.s.atwood@intel.com>
Link: https://lore.kernel.org/r/20250709221605.172516-4-matthew.s.atwood@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

Author: msatwood

drivers/gpu/drm/xe/xe_rtp.c

@@ -56,37 +56,61 @@ static bool rule_matches(const struct xe_device *xe,
 				xe->info.subplatform == r->subplatform;
 			break;
 		case XE_RTP_MATCH_GRAPHICS_VERSION:
+			if (drm_WARN_ON(&xe->drm, !gt))
+				return false;
+
 			match = xe->info.graphics_verx100 == r->ver_start &&
 				(!has_samedia(xe) || !xe_gt_is_media_type(gt));
 			break;
 		case XE_RTP_MATCH_GRAPHICS_VERSION_RANGE:
+			if (drm_WARN_ON(&xe->drm, !gt))
+				return false;
+
 			match = xe->info.graphics_verx100 >= r->ver_start &&
 				xe->info.graphics_verx100 <= r->ver_end &&
 				(!has_samedia(xe) || !xe_gt_is_media_type(gt));
 			break;
 		case XE_RTP_MATCH_GRAPHICS_VERSION_ANY_GT:
+			if (drm_WARN_ON(&xe->drm, !gt))
+				return false;
+
 			match = xe->info.graphics_verx100 == r->ver_start;
 			break;
 		case XE_RTP_MATCH_GRAPHICS_STEP:
+			if (drm_WARN_ON(&xe->drm, !gt))
+				return false;
+
 			match = xe->info.step.graphics >= r->step_start &&
 				xe->info.step.graphics < r->step_end &&
 				(!has_samedia(xe) || !xe_gt_is_media_type(gt));
 			break;
 		case XE_RTP_MATCH_MEDIA_VERSION:
+			if (drm_WARN_ON(&xe->drm, !gt))
+				return false;
+
 			match = xe->info.media_verx100 == r->ver_start &&
 				(!has_samedia(xe) || xe_gt_is_media_type(gt));
 			break;
 		case XE_RTP_MATCH_MEDIA_VERSION_RANGE:
+			if (drm_WARN_ON(&xe->drm, !gt))
+				return false;
+
 			match = xe->info.media_verx100 >= r->ver_start &&
 				xe->info.media_verx100 <= r->ver_end &&
 				(!has_samedia(xe) || xe_gt_is_media_type(gt));
 			break;
 		case XE_RTP_MATCH_MEDIA_STEP:
+			if (drm_WARN_ON(&xe->drm, !gt))
+				return false;
+
 			match = xe->info.step.media >= r->step_start &&
 				xe->info.step.media < r->step_end &&
 				(!has_samedia(xe) || xe_gt_is_media_type(gt));
 			break;
 		case XE_RTP_MATCH_MEDIA_VERSION_ANY_GT:
+			if (drm_WARN_ON(&xe->drm, !gt))
+				return false;
+
 			match = xe->info.media_verx100 == r->ver_start;
 			break;
 		case XE_RTP_MATCH_INTEGRATED:
@@ -108,6 +132,9 @@ static bool rule_matches(const struct xe_device *xe,
 			match = hwe->class != r->engine_class;
 			break;
 		case XE_RTP_MATCH_FUNC:
+			if (drm_WARN_ON(&xe->drm, !gt))
+				return false;
+
 			match = r->match_func(gt, hwe);
 			break;
 		default:
@@ -186,6 +213,11 @@ static void rtp_get_context(struct xe_rtp_process_ctx *ctx,
 			    struct xe_device **xe)
 {
 	switch (ctx->type) {
+	case XE_RTP_PROCESS_TYPE_DEVICE:
+		*hwe = NULL;
+		*gt = NULL;
+		*xe = ctx->xe;
+		break;
 	case XE_RTP_PROCESS_TYPE_GT:
 		*hwe = NULL;
 		*gt = ctx->gt;

drivers/gpu/drm/xe/xe_rtp.h

@@ -422,7 +422,8 @@ struct xe_reg_sr;
 
 #define XE_RTP_PROCESS_CTX_INITIALIZER(arg__) _Generic((arg__),							\
 	struct xe_hw_engine * :	(struct xe_rtp_process_ctx){ { (void *)(arg__) }, XE_RTP_PROCESS_TYPE_ENGINE },	\
-	struct xe_gt * :	(struct xe_rtp_process_ctx){ { (void *)(arg__) }, XE_RTP_PROCESS_TYPE_GT })
+	struct xe_gt * :	(struct xe_rtp_process_ctx){ { (void *)(arg__) }, XE_RTP_PROCESS_TYPE_GT },	\
+	struct xe_device * :	(struct xe_rtp_process_ctx){ { (void *)(arg__) }, XE_RTP_PROCESS_TYPE_DEVICE })
 
 void xe_rtp_process_ctx_enable_active_tracking(struct xe_rtp_process_ctx *ctx,
 					       unsigned long *active_entries,

drivers/gpu/drm/xe/xe_rtp_types.h

@@ -110,12 +110,14 @@ struct xe_rtp_entry {
 };
 
 enum xe_rtp_process_type {
+	XE_RTP_PROCESS_TYPE_DEVICE,
 	XE_RTP_PROCESS_TYPE_GT,
 	XE_RTP_PROCESS_TYPE_ENGINE,
 };
 
 struct xe_rtp_process_ctx {
 	union {
+		struct xe_device *xe;
 		struct xe_gt *gt;
 		struct xe_hw_engine *hwe;
 	};