linux-kernel - [PATCH v3 4/4] drm/panthor: Display heap chunk entries in DebugFS GEMS file

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Message-ID: <20250327140845.105962-5-adrian.larumbe@collabora.com>
Date: Thu, 27 Mar 2025 14:08:37 +0000
From: Adrián Larumbe <adrian.larumbe@...labora.com>
To: ?UTF-8?q?Adri=C3=A1n=20Larumbe?= <adrian.larumbe@...labora.com>,
	Boris Brezillon <boris.brezillon@...labora.com>,
	Steven Price <steven.price@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Christian König <christian.koenig@....com>
Cc: kernel@...labora.com,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org,
	linaro-mm-sig@...ts.linaro.org
Subject: [PATCH v3 4/4] drm/panthor: Display heap chunk entries in DebugFS GEMS file

Expand the driver's DebugFS GEMS file to display entries for the heap
chunks' GEM objects, both those allocated at heap creation time through an
ioctl(), or in response to a tiler OOM event.

Signed-off-by: Adrián Larumbe <adrian.larumbe@...labora.com>
---
 drivers/gpu/drm/panthor/panthor_gem.c  | 12 +-----------
 drivers/gpu/drm/panthor/panthor_gem.h  | 14 ++++++++++++++
 drivers/gpu/drm/panthor/panthor_heap.c |  3 +++
 3 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/panthor/panthor_gem.c b/drivers/gpu/drm/panthor/panthor_gem.c
index fbf560920194..efc14c179680 100644
--- a/drivers/gpu/drm/panthor/panthor_gem.c
+++ b/drivers/gpu/drm/panthor/panthor_gem.c
@@ -22,16 +22,6 @@ static void panthor_gem_debugfs_bo_init(struct panthor_gem_object *bo)
 	get_task_comm(bo->gems.creator.process_name, current->group_leader);
 }
 
-static void panthor_gem_debugfs_bo_add(struct panthor_gem_object *bo)
-{
-	struct panthor_device *ptdev =  container_of(bo->base.base.dev,
-						     struct panthor_device, base);
-
-	mutex_lock(&ptdev->gems.lock);
-	list_add_tail(&bo->gems.node, &ptdev->gems.node);
-	mutex_unlock(&ptdev->gems.lock);
-}
-
 static void panthor_gem_debugfs_bo_rm(struct panthor_gem_object *bo)
 {
 	struct panthor_device *ptdev = container_of(bo->base.base.dev,
@@ -44,9 +34,9 @@ static void panthor_gem_debugfs_bo_rm(struct panthor_gem_object *bo)
 	list_del_init(&bo->gems.node);
 	mutex_unlock(&ptdev->gems.lock);
 }
+
 #else
 static void panthor_gem_debugfs_bo_init(struct panthor_gem_object *bo) {}
-static void panthor_gem_debugfs_bo_add(struct panthor_gem_object *bo) {}
 static void panthor_gem_debugfs_bo_rm(struct panthor_gem_object *bo) {}
 #endif
 
diff --git a/drivers/gpu/drm/panthor/panthor_gem.h b/drivers/gpu/drm/panthor/panthor_gem.h
index 7c896ec35801..95093b98b990 100644
--- a/drivers/gpu/drm/panthor/panthor_gem.h
+++ b/drivers/gpu/drm/panthor/panthor_gem.h
@@ -11,6 +11,8 @@
 #include <linux/iosys-map.h>
 #include <linux/rwsem.h>
 
+#include "panthor_device.h"
+
 struct panthor_vm;
 
 /**
@@ -182,6 +184,18 @@ void panthor_kernel_bo_destroy(struct panthor_kernel_bo *bo);
 #ifdef CONFIG_DEBUG_FS
 void panthor_gem_debugfs_print_bos(struct panthor_device *pfdev,
 				   struct seq_file *m);
+
+static inline void panthor_gem_debugfs_bo_add(struct panthor_gem_object *bo)
+{
+	struct panthor_device *ptdev =  container_of(bo->base.base.dev,
+						     struct panthor_device, base);
+
+	mutex_lock(&ptdev->gems.lock);
+	list_add_tail(&bo->gems.node, &ptdev->gems.node);
+	mutex_unlock(&ptdev->gems.lock);
+}
+#elif
+static inline void panthor_gem_debugfs_bo_add(struct panthor_gem_object *bo) {}
 #endif
 
 #endif /* __PANTHOR_GEM_H__ */
diff --git a/drivers/gpu/drm/panthor/panthor_heap.c b/drivers/gpu/drm/panthor/panthor_heap.c
index db0285ce5812..30136b386869 100644
--- a/drivers/gpu/drm/panthor/panthor_heap.c
+++ b/drivers/gpu/drm/panthor/panthor_heap.c
@@ -180,6 +180,9 @@ static int panthor_alloc_heap_chunk(struct panthor_device *ptdev,
 	heap->chunk_count++;
 	mutex_unlock(&heap->lock);
 
+	panthor_gem_kernel_bo_set_label(chunk->bo, "Tiler heap chunk");
+	panthor_gem_debugfs_bo_add(to_panthor_bo(chunk->bo->obj));
+
 	return 0;
 
 err_destroy_bo:
-- 
2.48.1