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

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On 14/01/2025 17:34, Adrián Larumbe wrote:
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,

If I can get away with a sneaky:

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxx>

Regards,

Tvrtko



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