[PATCH v9 2/5] drm/file: Add fdinfo helper for printing regions with prefix

Adrián Larumbe
2025-01-23T22:54:26Z

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@collabora.com>
Cc: Tvrtko Ursulin <tursulin@ursulin.net>
---
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