drm/exynos: add debugfs interface and gem_info node

The memps requires gem_info with gem_names to analyze graphics
shared memory, so this patch adds gem_info node with debugfs
interface.

Signed-off-by: YoungJun Cho <yj44.cho@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>

5 files changed, 133 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/Makefile b/drivers/gpu/drm/exynos/Makefile
index cc90679cfc06..025315b99790 100644
--- a/drivers/gpu/drm/exynos/Makefile
+++ b/drivers/gpu/drm/exynos/Makefile
@@ -21,5 +21,6 @@ exynosdrm-$(CONFIG_DRM_EXYNOS_IPP)	+= exynos_drm_ipp.o
 exynosdrm-$(CONFIG_DRM_EXYNOS_FIMC)	+= exynos_drm_fimc.o
 exynosdrm-$(CONFIG_DRM_EXYNOS_ROTATOR)	+= exynos_drm_rotator.o
 exynosdrm-$(CONFIG_DRM_EXYNOS_GSC)	+= exynos_drm_gsc.o
+exynosdrm-$(CONFIG_DEBUG_FS)		+= exynos_drm_debugfs.o
 
 obj-$(CONFIG_DRM_EXYNOS)		+= exynosdrm.o
diff --git a/drivers/gpu/drm/exynos/exynos_drm_debugfs.c b/drivers/gpu/drm/exynos/exynos_drm_debugfs.c
new file mode 100644
index 000000000000..ad65c7b91de5
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_debugfs.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: YoungJun Cho <yj44.cho@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <drm/drmP.h>
+
+#include <linux/debugfs.h>
+
+#include "exynos_drm_drv.h"
+#include "exynos_drm_gem.h"
+
+struct exynos_drm_debugfs_gem_info_data {
+	struct drm_file	*filp;
+	struct seq_file	*m;
+};
+
+static int exynos_drm_debugfs_gem_one_info(int id, void *ptr, void *data)
+{
+	struct exynos_drm_debugfs_gem_info_data *gem_info_data =
+				(struct exynos_drm_debugfs_gem_info_data *)data;
+	struct drm_file *filp = gem_info_data->filp;
+	struct drm_exynos_file_private *file_priv = filp->driver_priv;
+	struct drm_gem_object *obj = (struct drm_gem_object *)ptr;
+	struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj);
+	struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer;
+
+	seq_printf(gem_info_data->m,
+			"%5d\t%5d\t%4d\t%4d\t%4d\t0x%08lx\t0x%x\t%4d\t%4d\t"
+			"%4d\t0x%p\n",
+				pid_nr(filp->pid),
+				file_priv->tgid,
+				id,
+				atomic_read(&obj->refcount.refcount),
+				obj->handle_count,
+				exynos_gem_obj->size,
+				exynos_gem_obj->flags,
+				buf->pfnmap,
+				obj->dma_buf ? 1 : 0,
+				obj->import_attach ? 1 : 0,
+				obj);
+
+	return 0;
+}
+
+static int exynos_drm_debugfs_gem_info(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct drm_minor *minor = node->minor;
+	struct drm_device *drm_dev = minor->dev;
+	struct exynos_drm_debugfs_gem_info_data gem_info_data;
+	struct drm_file *filp;
+
+	gem_info_data.m = m;
+
+	seq_puts(m, "pid\ttgid\thandle\tref_cnt\thdl_cnt\tsize\t\tflags\t"
+			"pfnmap\texport\timport\tobj_addr\n");
+
+	mutex_lock(&drm_dev->struct_mutex);
+	list_for_each_entry(filp, &drm_dev->filelist, lhead) {
+		gem_info_data.filp = filp;
+
+		spin_lock(&filp->table_lock);
+		idr_for_each(&filp->object_idr, exynos_drm_debugfs_gem_one_info,
+				&gem_info_data);
+		spin_unlock(&filp->table_lock);
+	}
+	mutex_unlock(&drm_dev->struct_mutex);
+
+	return 0;
+}
+
+static struct drm_info_list exynos_drm_debugfs_list[] = {
+	{"gem_info",	exynos_drm_debugfs_gem_info,	DRIVER_GEM},
+};
+#define EXYNOS_DRM_DEBUGFS_ENTRIES	ARRAY_SIZE(exynos_drm_debugfs_list)
+
+int exynos_drm_debugfs_init(struct drm_minor *minor)
+{
+	return drm_debugfs_create_files(exynos_drm_debugfs_list,
+					EXYNOS_DRM_DEBUGFS_ENTRIES,
+					minor->debugfs_root, minor);
+}
+
+void exynos_drm_debugfs_cleanup(struct drm_minor *minor)
+{
+	drm_debugfs_remove_files(exynos_drm_debugfs_list,
+					EXYNOS_DRM_DEBUGFS_ENTRIES, minor);
+}
diff --git a/drivers/gpu/drm/exynos/exynos_drm_debugfs.h b/drivers/gpu/drm/exynos/exynos_drm_debugfs.h
new file mode 100644
index 000000000000..17a50b2e55a8
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_debugfs.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2014 Samsung Electronics Co.Ltd
+ * Author: YoungJun Cho <yj44.cho@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundationr
+ */
+
+#ifndef _EXYNOS_DRM_DEBUGFS_H_
+#define _EXYNOS_DRM_DEBUGFS_H_
+
+#if defined(CONFIG_DEBUG_FS)
+extern int exynos_drm_debugfs_init(struct drm_minor *minor);
+extern void exynos_drm_debugfs_cleanup(struct drm_minor *minor);
+#else
+static inline int exynos_drm_debugfs_init(struct drm_minor *minor)
+{
+	return 0;
+}
+
+static inline void exynos_drm_debugfs_cleanup(struct drm_minor *minor)
+{
+}
+#endif
+
+#endif	/* _EXYNOS_DRM_DEBUGFS_H_ */
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 90168d7cf66a..2768881b3fd2 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -31,6 +31,7 @@
 #include "exynos_drm_g2d.h"
 #include "exynos_drm_ipp.h"
 #include "exynos_drm_iommu.h"
+#include "exynos_drm_debugfs.h"
 
 #define DRIVER_NAME	"exynos"
 #define DRIVER_DESC	"Samsung SoC DRM"
@@ -215,6 +216,10 @@ static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 	if (!file_priv)
 		return -ENOMEM;
 
+#if defined(CONFIG_DEBUG_FS)
+	file_priv->tgid = task_tgid_nr(current);
+#endif
+
 	file->driver_priv = file_priv;
 
 	ret = exynos_drm_subdrv_open(dev, file);
@@ -328,6 +333,10 @@ static struct drm_driver exynos_drm_driver = {
 	.get_vblank_counter	= drm_vblank_count,
 	.enable_vblank		= exynos_drm_crtc_enable_vblank,
 	.disable_vblank		= exynos_drm_crtc_disable_vblank,
+#if defined(CONFIG_DEBUG_FS)
+	.debugfs_init		= exynos_drm_debugfs_init,
+	.debugfs_cleanup	= exynos_drm_debugfs_cleanup,
+#endif
 	.gem_free_object	= exynos_drm_gem_free_object,
 	.gem_vm_ops		= &exynos_drm_gem_vm_ops,
 	.dumb_create		= exynos_drm_gem_dumb_create,
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 9afd390d4674..6a1ffcb73946 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -234,6 +234,9 @@ struct exynos_drm_g2d_private {
 struct drm_exynos_file_private {
 	struct exynos_drm_g2d_private	*g2d_priv;
 	struct device			*ipp_dev;
+#if defined(CONFIG_DEBUG_FS)
+	pid_t				tgid;
+#endif
 };
 
 /*