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From d9c801ad20b4d1b705fe38b1ca35dea9556afa1b Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Mon, 12 Feb 2024 16:04:24 -0500
Subject: drm: add drm_gem_object_is_shared_for_memory_stats() helper
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
From: Alex Deucher <alexander.deucher@amd.com>
[ Upstream commit b31f5eba32ae8cc28e7cfa5a55ec8670d8c718e2 ]
Add a helper so that drm drivers can consistently report
shared status via the fdinfo shared memory stats interface.
In addition to handle count, show buffers as shared if they
are shared via dma-buf as well (e.g., shared with v4l or some
other subsystem).
v2: switch to inline function
Link: https://lore.kernel.org/all/20231207180225.439482-1-alexander.deucher@amd.com/
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> (v1)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.keonig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Stable-dep-of: a6ff969fe9cb ("drm/amdgpu: fix visible VRAM handling during faults")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/drm/drm_gem.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index 369505447acd8..2ebec3984cd44 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -553,6 +553,19 @@ unsigned long drm_gem_lru_scan(struct drm_gem_lru *lru,
int drm_gem_evict(struct drm_gem_object *obj);
+/**
+ * drm_gem_object_is_shared_for_memory_stats - helper for shared memory stats
+ *
+ * This helper should only be used for fdinfo shared memory stats to determine
+ * if a GEM object is shared.
+ *
+ * @obj: obj in question
+ */
+static inline bool drm_gem_object_is_shared_for_memory_stats(struct drm_gem_object *obj)
+{
+ return (obj->handle_count > 1) || obj->dma_buf;
+}
+
#ifdef CONFIG_LOCKDEP
/**
* drm_gem_gpuva_set_lock() - Set the lock protecting accesses to the gpuva list.
--
2.43.0
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