drm/i915: split out stepping info to a new file

gt/intel_workarounds.c is decidedly the wrong place for handling
stepping info. Add new intel_step.[ch] for the data, and move the
stepping arrays there. No functional changes.

v2: Rename stepping->step
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f69baf82819a8a35815fca25a520de5c38a7e1b5.1616764798.git.jani.nikula@intel.com

drivers/gpu/drm/i915/Makefile

@@ -52,6 +52,7 @@ i915-y += i915_drv.o \
 	  intel_pm.o \
 	  intel_runtime_pm.o \
 	  intel_sideband.o \
+	  intel_step.o \
 	  intel_uncore.o \
 	  intel_wakeref.o \
 	  vlv_suspend.o

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

@@ -53,45 +53,6 @@
  * - Public functions to init or apply the given workaround type.
  */
 
-/*
- * KBL revision ID ordering is bizarre; higher revision ID's map to lower
- * steppings in some cases.  So rather than test against the revision ID
- * directly, let's map that into our own range of increasing ID's that we
- * can test against in a regular manner.
- */
-
-const struct i915_rev_steppings kbl_revids[] = {
-	[0] = { .gt_stepping = KBL_REVID_A0, .disp_stepping = KBL_REVID_A0 },
-	[1] = { .gt_stepping = KBL_REVID_B0, .disp_stepping = KBL_REVID_B0 },
-	[2] = { .gt_stepping = KBL_REVID_C0, .disp_stepping = KBL_REVID_B0 },
-	[3] = { .gt_stepping = KBL_REVID_D0, .disp_stepping = KBL_REVID_B0 },
-	[4] = { .gt_stepping = KBL_REVID_F0, .disp_stepping = KBL_REVID_C0 },
-	[5] = { .gt_stepping = KBL_REVID_C0, .disp_stepping = KBL_REVID_B1 },
-	[6] = { .gt_stepping = KBL_REVID_D1, .disp_stepping = KBL_REVID_B1 },
-	[7] = { .gt_stepping = KBL_REVID_G0, .disp_stepping = KBL_REVID_C0 },
-};
-
-const struct i915_rev_steppings tgl_uy_revid_step_tbl[] = {
-	[0] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_A0 },
-	[1] = { .gt_stepping = STEP_B0, .disp_stepping = STEP_C0 },
-	[2] = { .gt_stepping = STEP_B1, .disp_stepping = STEP_C0 },
-	[3] = { .gt_stepping = STEP_C0, .disp_stepping = STEP_D0 },
-};
-
-/* Same GT stepping between tgl_uy_revids and tgl_revids don't mean the same HW */
-const struct i915_rev_steppings tgl_revid_step_tbl[] = {
-	[0] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_B0 },
-	[1] = { .gt_stepping = STEP_B0, .disp_stepping = STEP_D0 },
-};
-
-const struct i915_rev_steppings adls_revid_step_tbl[] = {
-	[0x0] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_A0 },
-	[0x1] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_A2 },
-	[0x4] = { .gt_stepping = STEP_B0, .disp_stepping = STEP_B0 },
-	[0x8] = { .gt_stepping = STEP_C0, .disp_stepping = STEP_B0 },
-	[0xC] = { .gt_stepping = STEP_D0, .disp_stepping = STEP_C0 },
-};
-
 static void wa_init_start(struct i915_wa_list *wal, const char *name, const char *engine_name)
 {
 	wal->name = name;

drivers/gpu/drm/i915/i915_drv.h

@@ -86,9 +86,10 @@
 #include "gt/uc/intel_uc.h"
 
 #include "intel_device_info.h"
+#include "intel_memory_region.h"
 #include "intel_pch.h"
 #include "intel_runtime_pm.h"
-#include "intel_memory_region.h"
+#include "intel_step.h"
 #include "intel_uncore.h"
 #include "intel_wakeref.h"
 #include "intel_wopcm.h"
@@ -1467,14 +1468,6 @@ enum {
 	KBL_REVID_G0,
 };
 
-struct i915_rev_steppings {
-	u8 gt_stepping;
-	u8 disp_stepping;
-};
-
-/* Defined in intel_workarounds.c */
-extern const struct i915_rev_steppings kbl_revids[];
-
 #define IS_KBL_GT_REVID(dev_priv, since, until) \
 	(IS_KABYLAKE(dev_priv) && \
 	 kbl_revids[INTEL_REVID(dev_priv)].gt_stepping >= since && \
@@ -1523,14 +1516,6 @@ enum {
 	STEP_D0,
 };
 
-#define TGL_UY_REVID_STEP_TBL_SIZE	4
-#define TGL_REVID_STEP_TBL_SIZE		2
-#define ADLS_REVID_STEP_TBL_SIZE	13
-
-extern const struct i915_rev_steppings tgl_uy_revid_step_tbl[TGL_UY_REVID_STEP_TBL_SIZE];
-extern const struct i915_rev_steppings tgl_revid_step_tbl[TGL_REVID_STEP_TBL_SIZE];
-extern const struct i915_rev_steppings adls_revid_step_tbl[ADLS_REVID_STEP_TBL_SIZE];
-
 static inline const struct i915_rev_steppings *
 tgl_stepping_get(struct drm_i915_private *dev_priv)
 {

drivers/gpu/drm/i915/intel_step.c

+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020,2021 Intel Corporation
+ */
+
+#include "i915_drv.h"
+#include "intel_step.h"
+
+/*
+ * KBL revision ID ordering is bizarre; higher revision ID's map to lower
+ * steppings in some cases.  So rather than test against the revision ID
+ * directly, let's map that into our own range of increasing ID's that we
+ * can test against in a regular manner.
+ */
+
+const struct i915_rev_steppings kbl_revids[] = {
+	[0] = { .gt_stepping = KBL_REVID_A0, .disp_stepping = KBL_REVID_A0 },
+	[1] = { .gt_stepping = KBL_REVID_B0, .disp_stepping = KBL_REVID_B0 },
+	[2] = { .gt_stepping = KBL_REVID_C0, .disp_stepping = KBL_REVID_B0 },
+	[3] = { .gt_stepping = KBL_REVID_D0, .disp_stepping = KBL_REVID_B0 },
+	[4] = { .gt_stepping = KBL_REVID_F0, .disp_stepping = KBL_REVID_C0 },
+	[5] = { .gt_stepping = KBL_REVID_C0, .disp_stepping = KBL_REVID_B1 },
+	[6] = { .gt_stepping = KBL_REVID_D1, .disp_stepping = KBL_REVID_B1 },
+	[7] = { .gt_stepping = KBL_REVID_G0, .disp_stepping = KBL_REVID_C0 },
+};
+
+const struct i915_rev_steppings tgl_uy_revid_step_tbl[] = {
+	[0] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_A0 },
+	[1] = { .gt_stepping = STEP_B0, .disp_stepping = STEP_C0 },
+	[2] = { .gt_stepping = STEP_B1, .disp_stepping = STEP_C0 },
+	[3] = { .gt_stepping = STEP_C0, .disp_stepping = STEP_D0 },
+};
+
+/* Same GT stepping between tgl_uy_revids and tgl_revids don't mean the same HW */
+const struct i915_rev_steppings tgl_revid_step_tbl[] = {
+	[0] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_B0 },
+	[1] = { .gt_stepping = STEP_B0, .disp_stepping = STEP_D0 },
+};
+
+const struct i915_rev_steppings adls_revid_step_tbl[] = {
+	[0x0] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_A0 },
+	[0x1] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_A2 },
+	[0x4] = { .gt_stepping = STEP_B0, .disp_stepping = STEP_B0 },
+	[0x8] = { .gt_stepping = STEP_C0, .disp_stepping = STEP_B0 },
+	[0xC] = { .gt_stepping = STEP_D0, .disp_stepping = STEP_C0 },
+};

drivers/gpu/drm/i915/intel_step.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020,2021 Intel Corporation
+ */
+
+#ifndef __INTEL_STEP_H__
+#define __INTEL_STEP_H__
+
+#include <linux/types.h>
+
+struct i915_rev_steppings {
+	u8 gt_stepping;
+	u8 disp_stepping;
+};
+
+#define TGL_UY_REVID_STEP_TBL_SIZE	4
+#define TGL_REVID_STEP_TBL_SIZE		2
+#define ADLS_REVID_STEP_TBL_SIZE	13
+
+extern const struct i915_rev_steppings kbl_revids[];
+extern const struct i915_rev_steppings tgl_uy_revid_step_tbl[TGL_UY_REVID_STEP_TBL_SIZE];
+extern const struct i915_rev_steppings tgl_revid_step_tbl[TGL_REVID_STEP_TBL_SIZE];
+extern const struct i915_rev_steppings adls_revid_step_tbl[ADLS_REVID_STEP_TBL_SIZE];
+
+#endif /* __INTEL_STEP_H__ */