drm/i915/gt: Add support of mocs propagation

Now there are lots of Command and registers that require mocs index
programming.
So propagating mocs_index from mocs to gt so that it can be
used directly without having platform-specific checks.

V2:
Changed 'i915_mocs_index_gt' to anonymous structure.

Cc: CQ Tang<cq.tang@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Ayaz A Siddiqui <ayaz.siddiqui@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210903092153.535736-2-ayaz.siddiqui@intel.com

drivers/gpu/drm/i915/gt/intel_gt.c

@@ -682,6 +682,8 @@ int intel_gt_init(struct intel_gt *gt)
 		goto err_pm;
 	}
 
+	set_mocs_index(gt);
+
 	err = intel_engines_init(gt);
 	if (err)
 		goto err_engines;

drivers/gpu/drm/i915/gt/intel_gt_types.h

@@ -192,6 +192,10 @@ struct intel_gt {
 
 		unsigned long mslice_mask;
 	} info;
+
+	struct {
+		u8 uc_index;
+	} mocs;
 };
 
 enum intel_gt_scratch_field {

drivers/gpu/drm/i915/gt/intel_mocs.c

@@ -22,6 +22,7 @@ struct drm_i915_mocs_table {
 	unsigned int size;
 	unsigned int n_entries;
 	const struct drm_i915_mocs_entry *table;
+	u8 uc_index;
 };
 
 /* Defines for the tables (XXX_MOCS_0 - XXX_MOCS_63) */
@@ -340,14 +341,18 @@ static unsigned int get_mocs_settings(const struct drm_i915_private *i915,
 {
 	unsigned int flags;
 
+	memset(table, 0, sizeof(struct drm_i915_mocs_table));
+
 	if (IS_DG1(i915)) {
 		table->size = ARRAY_SIZE(dg1_mocs_table);
 		table->table = dg1_mocs_table;
+		table->uc_index = 1;
 		table->n_entries = GEN9_NUM_MOCS_ENTRIES;
 	} else if (GRAPHICS_VER(i915) >= 12) {
 		table->size  = ARRAY_SIZE(tgl_mocs_table);
 		table->table = tgl_mocs_table;
 		table->n_entries = GEN9_NUM_MOCS_ENTRIES;
+		table->uc_index = 3;
 	} else if (GRAPHICS_VER(i915) == 11) {
 		table->size  = ARRAY_SIZE(icl_mocs_table);
 		table->table = icl_mocs_table;
@@ -504,6 +509,14 @@ static u32 global_mocs_offset(void)
 	return i915_mmio_reg_offset(GEN12_GLOBAL_MOCS(0));
 }
 
+void set_mocs_index(struct intel_gt *gt)
+{
+	struct drm_i915_mocs_table table;
+
+	get_mocs_settings(gt->i915, &table);
+	gt->mocs.uc_index = table.uc_index;
+}
+
 void intel_mocs_init(struct intel_gt *gt)
 {
 	struct drm_i915_mocs_table table;

drivers/gpu/drm/i915/gt/intel_mocs.h

@@ -36,5 +36,6 @@ struct intel_gt;
 
 void intel_mocs_init(struct intel_gt *gt);
 void intel_mocs_init_engine(struct intel_engine_cs *engine);
+void set_mocs_index(struct intel_gt *gt);
 
 #endif