drm/i915/xehp: handle new steering options

Xe_HP is more modular than its predecessors and as a consequence it has
more types of replicated registers.  As with l3bank regions on previous
platforms, we may need to explicitly re-steer accesses to these new
types of ranges at runtime if we can't find a single default steering
value that satisfies the fusing of all types.

v2:
 - Add a local 'i915' variable to reduce gt->i915 usage.  (Caz)
 - Drop unused 'intel_gt_read_register' prototype.  (Caz)

v3:
 - Drop unnecessary comment text.  (Lucas)
 - Drop unused register bit definition.  (Lucas)

Bspec: 66534
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Caz Yokoyama <caz.yokoyama@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210729170008.2836648-2-matthew.d.roper@intel.com

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h
index 97a5075288d2..a81e21bf1bd1 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
@@ -47,9 +47,14 @@ struct intel_mmio_range {
  * of multicast registers.  If another type of steering does not have any
  * overlap in valid steering targets with 'subslice' style registers, we will
  * need to explicitly re-steer reads of registers of the other type.
+ *
+ * Only the replication types that may need additional non-default steering
+ * are listed here.
  */
 enum intel_steering_type {
 	L3BANK,
+	MSLICE,
+	LNCF,
 
 	NUM_STEERING_TYPES
 };
@@ -184,6 +189,8 @@ struct intel_gt {
 
 		/* Slice/subslice/EU info */
 		struct sseu_dev_info sseu;
+
+		unsigned long mslice_mask;
 	} info;
 };