[PATCH v3 2/4] drm/xe/guc: Add new debugfs entry for lfd format output

[Zhanjun Dong]

Add new debugfs entry "guc_log_lfd", prepared for output guc log
in LFD(Log Format Descriptors) format.

Signed-off-by: Zhanjun Dong <zhanjun.dong at intel.com>
---
 drivers/gpu/drm/xe/xe_guc_debugfs.c | 14 ++++++++++++
 drivers/gpu/drm/xe/xe_guc_log.c     | 34 +++++++++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_guc_log.h     |  1 +
 3 files changed, 49 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_guc_debugfs.c b/drivers/gpu/drm/xe/xe_guc_debugfs.c
index c569ff456e74..6449c9a69b8a 100644
--- a/drivers/gpu/drm/xe/xe_guc_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_guc_debugfs.c
@@ -48,6 +48,19 @@ static int guc_log(struct seq_file *m, void *data)
 	return 0;
 }
 
+static int guc_log_lfd(struct seq_file *m, void *data)
+{
+	struct xe_guc *guc = node_to_guc(m->private);
+	struct xe_device *xe = guc_to_xe(guc);
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	xe_pm_runtime_get(xe);
+	xe_guc_log_print_lfd(&guc->log, &p);
+	xe_pm_runtime_put(xe);
+
+	return 0;
+}
+
 static int guc_log_dmesg(struct seq_file *m, void *data)
 {
 	struct xe_guc *guc = node_to_guc(m->private);
@@ -89,6 +102,7 @@ static int guc_pc(struct seq_file *m, void *data)
 static const struct drm_info_list debugfs_list[] = {
 	{"guc_info", guc_info, 0},
 	{"guc_log", guc_log, 0},
+	{"guc_log_lfd", guc_log_lfd, 0},
 	{"guc_log_dmesg", guc_log_dmesg, 0},
 	{"guc_ctb", guc_ctb, 0},
 	{"guc_pc", guc_pc, 0},
diff --git a/drivers/gpu/drm/xe/xe_guc_log.c b/drivers/gpu/drm/xe/xe_guc_log.c
index 38039c411387..df849a0ee7e5 100644
--- a/drivers/gpu/drm/xe/xe_guc_log.c
+++ b/drivers/gpu/drm/xe/xe_guc_log.c
@@ -216,6 +216,26 @@ void xe_guc_log_snapshot_print(struct xe_guc_log_snapshot *snapshot, struct drm_
 	}
 }
 
+static void
+xe_guc_log_snapshot_print_lfd(struct xe_guc_log_snapshot *snapshot, struct drm_printer *p,
+			      struct xe_guc_log *log)
+{
+	size_t remain;
+	int i;
+
+	if (!snapshot)
+		return;
+
+	remain = snapshot->size;
+	for (i = 0; i < snapshot->num_chunks; i++) {
+		size_t size = min(GUC_LOG_CHUNK_SIZE, remain);
+
+		/* To be add: Output snapshot in LFD format */
+
+		remain -= size;
+	}
+}
+
 /**
  * xe_guc_log_print_dmesg - dump a copy of the GuC log to dmesg
  * @log: GuC log structure
@@ -251,6 +271,20 @@ void xe_guc_log_print(struct xe_guc_log *log, struct drm_printer *p)
 	xe_guc_log_snapshot_free(snapshot);
 }
 
+/**
+ * xe_guc_log_print_lfd - dump a copy of the GuC log to some useful location
+ * @log: GuC log structure
+ * @p: the printer object to output to
+ */
+void xe_guc_log_print_lfd(struct xe_guc_log *log, struct drm_printer *p)
+{
+	struct xe_guc_log_snapshot *snapshot;
+
+	snapshot = xe_guc_log_snapshot_capture(log, false);
+	xe_guc_log_snapshot_print_lfd(snapshot, p, log);
+	xe_guc_log_snapshot_free(snapshot);
+}
+
 int xe_guc_log_init(struct xe_guc_log *log)
 {
 	struct xe_device *xe = log_to_xe(log);
diff --git a/drivers/gpu/drm/xe/xe_guc_log.h b/drivers/gpu/drm/xe/xe_guc_log.h
index 5b896f5fafaf..37ff4d11e6cf 100644
--- a/drivers/gpu/drm/xe/xe_guc_log.h
+++ b/drivers/gpu/drm/xe/xe_guc_log.h
@@ -40,6 +40,7 @@ struct xe_device;
 
 int xe_guc_log_init(struct xe_guc_log *log);
 void xe_guc_log_print(struct xe_guc_log *log, struct drm_printer *p);
+void xe_guc_log_print_lfd(struct xe_guc_log *log, struct drm_printer *p);
 void xe_guc_log_print_dmesg(struct xe_guc_log *log);
 struct xe_guc_log_snapshot *xe_guc_log_snapshot_capture(struct xe_guc_log *log, bool atomic);
 void xe_guc_log_snapshot_print(struct xe_guc_log_snapshot *snapshot, struct drm_printer *p);
-- 
2.34.1