drm/nouveau/debugfs: add infrastructure to add files with other fops than only read (1b7ab1a1) · Commits · 戴 / test

drivers/gpu/drm/nouveau/nouveau_debugfs.c

+53 −3

Original line number	Diff line number	Diff line
		@@ -28,6 +28,7 @@
		* Ben Skeggs <bskeggs@redhat.com>
		*/

		#include <linux/debugfs.h>
		#include "nouveau_debugfs.h"
		#include "nouveau_drm.h"

		@@ -48,17 +49,66 @@ static struct drm_info_list nouveau_debugfs_list[] = {
		};
		#define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)

		static const struct nouveau_debugfs_files {
		const char *name;
		const struct file_operations *fops;
		} nouveau_debugfs_files[] = {};


		static int
		nouveau_debugfs_create_file(struct drm_minor *minor,
		const struct nouveau_debugfs_files *ndf)
		{
		struct drm_info_node *node;

		node = kmalloc(sizeof(*node), GFP_KERNEL);
		if (node == NULL)
		return -ENOMEM;

		node->minor = minor;
		node->info_ent = (const void *)ndf->fops;
		node->dent = debugfs_create_file(ndf->name, S_IRUGO \| S_IWUSR,
		minor->debugfs_root, node, ndf->fops);
		if (!node->dent) {
		kfree(node);
		return -ENOMEM;
		}

		mutex_lock(&minor->debugfs_lock);
		list_add(&node->list, &minor->debugfs_list);
		mutex_unlock(&minor->debugfs_lock);
		return 0;
		}

		int
		nouveau_debugfs_init(struct drm_minor *minor)
		{
		drm_debugfs_create_files(nouveau_debugfs_list, NOUVEAU_DEBUGFS_ENTRIES,
		int i, ret;

		for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
		ret = nouveau_debugfs_create_file(minor,
		&nouveau_debugfs_files[i]);

		if (ret)
		return ret;
		}

		return drm_debugfs_create_files(nouveau_debugfs_list,
		NOUVEAU_DEBUGFS_ENTRIES,
		minor->debugfs_root, minor);
		return 0;
		}

		void
		nouveau_debugfs_takedown(struct drm_minor *minor)
		{
		int i;

		drm_debugfs_remove_files(nouveau_debugfs_list, NOUVEAU_DEBUGFS_ENTRIES,
		minor);

		for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
		drm_debugfs_remove_files((struct drm_info_list *)
		nouveau_debugfs_files[i].fops,
		1, minor);
		}
		}

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