[PATCH] drm/xe/mocs: Add debugfs node to dump mocs

[Janga Rahul Kumar]

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

Cc: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Janga Rahul Kumar <janga.rahul.kumar at intel.com>
---
 drivers/gpu/drm/xe/xe_gt_debugfs.c | 13 +++++++++
 drivers/gpu/drm/xe/xe_mocs.c       | 45 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_mocs.h       |  8 ++++++
 3 files changed, 66 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_gt_debugfs.c b/drivers/gpu/drm/xe/xe_gt_debugfs.c
index 6b4dc2927727..918be3b90ba9 100644
--- a/drivers/gpu/drm/xe/xe_gt_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_gt_debugfs.c
@@ -17,6 +17,7 @@
 #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"
@@ -233,6 +234,17 @@ static int vecs_default_lrc(struct seq_file *m, void *data)
 	return 0;
 }
 
+static int mocs(struct seq_file *m, void *data)
+{
+	struct xe_gt *gt = node_to_gt(m->private);
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	xe_pm_runtime_get(gt_to_xe(gt));
+	xe_mocs_dump(gt, &p);
+	xe_pm_runtime_put(gt_to_xe(gt));
+
+	return 0;
+}
 static const struct drm_info_list debugfs_list[] = {
 	{"hw_engines", hw_engines, 0},
 	{"force_reset", force_reset, 0},
@@ -248,6 +260,7 @@ static const struct drm_info_list debugfs_list[] = {
 	{"default_lrc_bcs", bcs_default_lrc},
 	{"default_lrc_vcs", vcs_default_lrc},
 	{"default_lrc_vecs", vecs_default_lrc},
+	{"mocs", mocs, 0},
 };
 
 void xe_gt_debugfs_register(struct xe_gt *gt)
diff --git a/drivers/gpu/drm/xe/xe_mocs.c b/drivers/gpu/drm/xe/xe_mocs.c
index bff659d20062..a0416100912b 100644
--- a/drivers/gpu/drm/xe/xe_mocs.c
+++ b/drivers/gpu/drm/xe/xe_mocs.c
@@ -574,6 +574,51 @@ void xe_mocs_init(struct xe_gt *gt)
 		init_l3cc_table(gt, &table);
 }
 
+void xe_mocs_dump(struct xe_gt *gt, struct drm_printer *p)
+{
+	struct xe_mocs_info table;
+	unsigned int flags;
+	u32 ret, reg_val;
+	unsigned int i;
+	struct xe_device *xe = gt_to_xe(gt);
+
+	flags = get_mocs_settings(xe, &table);
+	xe_device_mem_access_get(xe);
+	ret = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
+
+	if (ret)
+		goto err_fw;
+
+	if (flags & HAS_GLOBAL_MOCS) {
+		drm_printf(p, "Global mocs registers configuration:\n");
+		for (i = 0; i < table.n_entries ; i++) {
+			if (regs_are_mcr(gt))
+				reg_val = xe_gt_mcr_unicast_read_any(gt, XEHP_GLOBAL_MOCS(i));
+			else
+				reg_val = xe_mmio_read32(gt, XELP_GLOBAL_MOCS(i));
+
+			drm_printf(p, "GLOB_MOCS[%d] 0x%x 0x%x\n", i, XELP_GLOBAL_MOCS(i).addr, reg_val);
+		}
+	}
+
+	if (flags & HAS_LNCF_MOCS) {
+		for (i = 0; i < (table.n_entries + 1)/2 ; i++) {
+			if (regs_are_mcr(gt))
+				reg_val = xe_gt_mcr_unicast_read_any(gt, XEHP_LNCFCMOCS(i));
+			else
+				reg_val = xe_mmio_read32(gt, XELP_LNCFCMOCS(i));
+
+			drm_printf(p, "LNCFCMOCS[%d] 0x%x 0x%x\n", i, XELP_LNCFCMOCS(i).addr, reg_val);
+		}
+	}
+
+	xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
+
+err_fw:
+	xe_assert(xe, !ret);
+	xe_device_mem_access_put(xe);
+}
+
 #if IS_ENABLED(CONFIG_DRM_XE_KUNIT_TEST)
 #include "tests/xe_mocs.c"
 #endif
diff --git a/drivers/gpu/drm/xe/xe_mocs.h b/drivers/gpu/drm/xe/xe_mocs.h
index 053754c5a94e..d6fa4485a6e9 100644
--- a/drivers/gpu/drm/xe/xe_mocs.h
+++ b/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
-- 
2.25.1