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drm/nouveau/debugfs: add infrastructure to add files with other fops than only read

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v2: use the same object for private data as with the drm debugfs functions

Signed-off-by: Karol Herbst <nouveau@karolherbst.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Karol Herbst 2015-07-29 13:44:21 +02:00 committed by Ben Skeggs
parent 9402aec544
commit 1b7ab1a1c3
1 changed files with 53 additions and 3 deletions
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56
drivers/gpu/drm/nouveau/nouveau_debugfs.c
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@ -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,
minor->debugfs_root, minor);
return 0;
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);
}
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);
}
}