[PATCH v8 2/4] drm/file: Add fdinfo helper for printing regions with prefix

[Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>]

This is motivated by the desire of some drivers (eg. Panthor) to print the
size of internal memory regions with a prefix that reflects the driver
name, as suggested in the previous documentation commit.

That means adding a new argument to print_size and making it available for
DRM users.

Signed-off-by: Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tursulin@xxxxxxxxxxx>
---
 drivers/gpu/drm/drm_file.c | 27 +++++++++++++++++++--------
 include/drm/drm_file.h     |  5 +++++
 2 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c
index cb5f22f5bbb6..f584abcd13cb 100644
--- a/drivers/gpu/drm/drm_file.c
+++ b/drivers/gpu/drm/drm_file.c
@@ -830,8 +830,12 @@ void drm_send_event(struct drm_device *dev, struct drm_pending_event *e)
 }
 EXPORT_SYMBOL(drm_send_event);
 
-static void print_size(struct drm_printer *p, const char *stat,
-		       const char *region, u64 sz)
+
+void drm_fdinfo_print_size(struct drm_printer *p,
+			   const char *prefix,
+			   const char *stat,
+			   const char *region,
+			   u64 sz)
 {
 	const char *units[] = {"", " KiB", " MiB"};
 	unsigned u;
@@ -842,8 +846,10 @@ static void print_size(struct drm_printer *p, const char *stat,
 		sz = div_u64(sz, SZ_1K);
 	}
 
-	drm_printf(p, "drm-%s-%s:\t%llu%s\n", stat, region, sz, units[u]);
+	drm_printf(p, "%s-%s-%s:\t%llu%s\n",
+		   prefix, stat, region, sz, units[u]);
 }
+EXPORT_SYMBOL(drm_fdinfo_print_size);
 
 /**
  * drm_print_memory_stats - A helper to print memory stats
@@ -858,15 +864,20 @@ void drm_print_memory_stats(struct drm_printer *p,
 			    enum drm_gem_object_status supported_status,
 			    const char *region)
 {
-	print_size(p, "total", region, stats->private + stats->shared);
-	print_size(p, "shared", region, stats->shared);
-	print_size(p, "active", region, stats->active);
+	const char *prefix = "drm";
+
+	drm_fdinfo_print_size(p, prefix, "total", region,
+			      stats->private + stats->shared);
+	drm_fdinfo_print_size(p, prefix, "shared", region, stats->shared);
+	drm_fdinfo_print_size(p, prefix, "active", region, stats->active);
 
 	if (supported_status & DRM_GEM_OBJECT_RESIDENT)
-		print_size(p, "resident", region, stats->resident);
+		drm_fdinfo_print_size(p, prefix, "resident", region,
+				      stats->resident);
 
 	if (supported_status & DRM_GEM_OBJECT_PURGEABLE)
-		print_size(p, "purgeable", region, stats->purgeable);
+		drm_fdinfo_print_size(p, prefix, "purgeable", region,
+				      stats->purgeable);
 }
 EXPORT_SYMBOL(drm_print_memory_stats);
 
diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h
index f0ef32e9fa5e..001ae553e8c3 100644
--- a/include/drm/drm_file.h
+++ b/include/drm/drm_file.h
@@ -494,6 +494,11 @@ struct drm_memory_stats {
 
 enum drm_gem_object_status;
 
+void drm_fdinfo_print_size(struct drm_printer *p,
+				  const char *prefix,
+				  const char *stat,
+				  const char *region,
+				  u64 sz);
 void drm_print_memory_stats(struct drm_printer *p,
 			    const struct drm_memory_stats *stats,
 			    enum drm_gem_object_status supported_status,
-- 
2.47.1