drm/xe/mocs: Add debugfs node to dump mocs

This is useful to check mocs configuration. Tests/Tools can use
this debugfs entry to get mocs info.

v2: Address review comments. Change debugfs output style similar
to pat debugfs. (Lucas De Marchi)

v3: rebase.

v4: Address review comments. Use function pointer inside ops
struct. Update Test-with links. Remove usage of flags wherever
not required. (Lucas De Marchi)

v5: Address review comments. Move register defines. Modify mocs
info struct to avoid holes. (Luca De Marchi)

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Janga Rahul Kumar <janga.rahul.kumar@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503193902.2056202-3-janga.rahul.kumar@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/regs/xe_gt_regs.h

@@ -59,6 +59,27 @@
 
 #define XELP_GLOBAL_MOCS(i)			XE_REG(0x4000 + (i) * 4)
 #define XEHP_GLOBAL_MOCS(i)			XE_REG_MCR(0x4000 + (i) * 4)
+#define   LE_SSE_MASK				REG_GENMASK(18, 17)
+#define   LE_SSE(value)				REG_FIELD_PREP(LE_SSE_MASK, value)
+#define   LE_COS_MASK				REG_GENMASK(16, 15)
+#define   LE_COS(value)				REG_FIELD_PREP(LE_COS_MASK)
+#define   LE_SCF_MASK				REG_BIT(14)
+#define   LE_SCF(value)				REG_FIELD_PREP(LE_SCF_MASK, value)
+#define   LE_PFM_MASK				REG_GENMASK(13, 11)
+#define   LE_PFM(value)				REG_FIELD_PREP(LE_PFM_MASK, value)
+#define   LE_SCC_MASK				REG_GENMASK(10, 8)
+#define   LE_SCC(value)				REG_FIELD_PREP(LE_SCC_MASK, value)
+#define   LE_RSC_MASK				REG_BIT(7)
+#define   LE_RSC(value)				REG_FIELD_PREP(LE_RSC_MASK, value)
+#define   LE_AOM_MASK				REG_BIT(6)
+#define   LE_AOM(value)				REG_FIELD_PREP(LE_AOM_MASK, value)
+#define   LE_LRUM_MASK				REG_GENMASK(5, 4)
+#define   LE_LRUM(value)			REG_FIELD_PREP(LE_LRUM_MASK, value)
+#define   LE_TGT_CACHE_MASK			REG_GENMASK(3, 2)
+#define   LE_TGT_CACHE(value)			REG_FIELD_PREP(LE_TGT_CACHE_MASK, value)
+#define   LE_CACHEABILITY_MASK			REG_GENMASK(1, 0)
+#define   LE_CACHEABILITY(value)		REG_FIELD_PREP(LE_CACHEABILITY_MASK, value)
+
 #define CCS_AUX_INV				XE_REG(0x4208)
 
 #define VD0_AUX_INV				XE_REG(0x4218)
@@ -314,9 +335,24 @@
 #define   XEHPC_OVRLSCCC			REG_BIT(0)
 
 /* L3 Cache Control */
+#define LNCFCMOCS_REG_COUNT			32
 #define XELP_LNCFCMOCS(i)			XE_REG(0xb020 + (i) * 4)
 #define XEHP_LNCFCMOCS(i)			XE_REG_MCR(0xb020 + (i) * 4)
-#define LNCFCMOCS_REG_COUNT			32
+#define   L3_UPPER_LKUP_MASK			REG_BIT(23)
+#define   L3_UPPER_GLBGO_MASK			REG_BIT(22)
+#define   L3_UPPER_IDX_CACHEABILITY_MASK	REG_GENMASK(21, 20)
+#define   L3_UPPER_IDX_SCC_MASK			REG_GENMASK(19, 17)
+#define   L3_UPPER_IDX_ESC_MASK			REG_BIT(16)
+#define   L3_LKUP_MASK				REG_BIT(7)
+#define   L3_LKUP(value)			REG_FIELD_PREP(L3_LKUP_MASK, value)
+#define   L3_GLBGO_MASK				REG_BIT(6)
+#define   L3_GLBGO(value)			REG_FIELD_PREP(L3_GLBGO_MASK, value)
+#define   L3_CACHEABILITY_MASK			REG_GENMASK(5, 4)
+#define   L3_CACHEABILITY(value)		REG_FIELD_PREP(L3_CACHEABILITY_MASK, value)
+#define   L3_SCC_MASK				REG_GENMASK(3, 1)
+#define   L3_SCC(value)				REG_FIELD_PREP(L3_SCC_MASK, value)
+#define   L3_ESC_MASK				REG_BIT(0)
+#define   L3_ESC(value)				REG_FIELD_PREP(L3_ESC_MASK, value)
 
 #define XEHP_L3NODEARBCFG			XE_REG_MCR(0xb0b4)
 #define   XEHP_LNESPARE				REG_BIT(19)

drivers/gpu/drm/xe/xe_gt_debugfs.c

@@ -20,6 +20,7 @@
 #include "xe_hw_engine.h"
 #include "xe_lrc.h"
 #include "xe_macros.h"
+#include "xe_mocs.h"
 #include "xe_pat.h"
 #include "xe_pm.h"
 #include "xe_reg_sr.h"
@@ -202,6 +203,15 @@ static int pat(struct xe_gt *gt, struct drm_printer *p)
 	return 0;
 }
 
+static int mocs(struct xe_gt *gt, struct drm_printer *p)
+{
+	xe_pm_runtime_get(gt_to_xe(gt));
+	xe_mocs_dump(gt, p);
+	xe_pm_runtime_put(gt_to_xe(gt));
+
+	return 0;
+}
+
 static int rcs_default_lrc(struct xe_gt *gt, struct drm_printer *p)
 {
 	xe_pm_runtime_get(gt_to_xe(gt));
@@ -257,6 +267,7 @@ static const struct drm_info_list debugfs_list[] = {
 	{"register-save-restore", .show = xe_gt_debugfs_simple_show, .data = register_save_restore},
 	{"workarounds", .show = xe_gt_debugfs_simple_show, .data = workarounds},
 	{"pat", .show = xe_gt_debugfs_simple_show, .data = pat},
+	{"mocs", .show = xe_gt_debugfs_simple_show, .data = mocs},
 	{"default_lrc_rcs", .show = xe_gt_debugfs_simple_show, .data = rcs_default_lrc},
 	{"default_lrc_ccs", .show = xe_gt_debugfs_simple_show, .data = ccs_default_lrc},
 	{"default_lrc_bcs", .show = xe_gt_debugfs_simple_show, .data = bcs_default_lrc},

drivers/gpu/drm/xe/xe_mocs.h

@@ -10,8 +10,16 @@
 
 struct xe_exec_queue;
 struct xe_gt;
+struct drm_printer;
 
 void xe_mocs_init_early(struct xe_gt *gt);
 void xe_mocs_init(struct xe_gt *gt);
 
+/**
+ * xe_mocs_dump - Dump mocs table
+ * @gt: GT structure
+ * @p: Printer to dump info to
+ */
+void xe_mocs_dump(struct xe_gt *gt, struct drm_printer *p);
+
 #endif