[Intel-xe] [PATCH 07/19] drm/xe/rtp: Add match helper for gslice fused off

[Lucas De Marchi]

Add match helper to detect when the first gslice is fused off, as needed
by future workarounds.

Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/xe/xe_rtp.c | 10 ++++++++++
 drivers/gpu/drm/xe/xe_rtp.h | 11 +++++++++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_rtp.c b/drivers/gpu/drm/xe/xe_rtp.c
index 0d2f51bb06e8..dc5a1c62d531 100644
--- a/drivers/gpu/drm/xe/xe_rtp.c
+++ b/drivers/gpu/drm/xe/xe_rtp.c
@@ -8,6 +8,7 @@
 #include <drm/xe_drm.h>
 
 #include "xe_gt.h"
+#include "xe_gt_topology.h"
 #include "xe_macros.h"
 #include "xe_reg_sr.h"
 
@@ -170,3 +171,12 @@ bool xe_rtp_match_first_render_or_compute(const struct xe_gt *gt,
 	return render_compute_mask &&
 		hwe->engine_id == __ffs(render_compute_mask);
 }
+
+bool xe_rtp_match_first_gslice_fused_off(const struct xe_gt *gt,
+					 const struct xe_hw_engine *hwe)
+{
+	unsigned int dss = xe_dss_mask_group_ffs(gt->fuse_topo.g_dss_mask, 0, 0);
+	unsigned int dss_per_grp = gt_to_xe(gt)->info.platform == XE_PVC ? 8 : 4;
+
+	return dss >= dss_per_grp;
+}
diff --git a/drivers/gpu/drm/xe/xe_rtp.h b/drivers/gpu/drm/xe/xe_rtp.h
index 433f0cbff57f..4140ef507fa0 100644
--- a/drivers/gpu/drm/xe/xe_rtp.h
+++ b/drivers/gpu/drm/xe/xe_rtp.h
@@ -427,4 +427,15 @@ bool xe_rtp_match_even_instance(const struct xe_gt *gt,
 bool xe_rtp_match_first_render_or_compute(const struct xe_gt *gt,
 					  const struct xe_hw_engine *hwe);
 
+/*
+ * xe_rtp_match_first_gslice_fused_off - Match when first gslice is fused off
+ *
+ * @gt: GT structure
+ * @hwe: Engine instance
+ *
+ * Returns: true if first gslice is fused off, false otherwise.
+ */
+bool xe_rtp_match_first_gslice_fused_off(const struct xe_gt *gt,
+					 const struct xe_hw_engine *hwe);
+
 #endif
-- 
2.39.0