change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/drivers/gpu/drm/nouveau/nouveau_debugfs.c
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@@ -47,6 +47,28 @@
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 }
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 static int
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+nouveau_debugfs_strap_peek(struct seq_file *m, void *data)
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+{
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+	struct drm_info_node *node = m->private;
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+	struct nouveau_drm *drm = nouveau_drm(node->minor->dev);
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+	int ret;
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+
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+	ret = pm_runtime_get_sync(drm->dev->dev);
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+	if (ret < 0 && ret != -EACCES) {
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+		pm_runtime_put_autosuspend(drm->dev->dev);
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+		return ret;
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+	}
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+
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+	seq_printf(m, "0x%08x\n",
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+		   nvif_rd32(&drm->client.device.object, 0x101000));
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+
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+	pm_runtime_mark_last_busy(drm->dev->dev);
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+	pm_runtime_put_autosuspend(drm->dev->dev);
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+
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+	return 0;
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+}
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+
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+static int
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 nouveau_debugfs_pstate_get(struct seq_file *m, void *data)
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 {
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 	struct drm_device *drm = m->private;
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@@ -189,7 +211,8 @@
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 };
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 static struct drm_info_list nouveau_debugfs_list[] = {
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-	{ "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
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+	{ "vbios.rom",  nouveau_debugfs_vbios_image, 0, NULL },
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+	{ "strap_peek", nouveau_debugfs_strap_peek, 0, NULL },
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 };
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 #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)
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@@ -200,24 +223,33 @@
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 	{"pstate", &nouveau_pstate_fops},
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 };
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-int
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+void
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 nouveau_drm_debugfs_init(struct drm_minor *minor)
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 {
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+	struct nouveau_drm *drm = nouveau_drm(minor->dev);
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 	struct dentry *dentry;
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 	int i;
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 	for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
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-		dentry = debugfs_create_file(nouveau_debugfs_files[i].name,
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-					     S_IRUGO | S_IWUSR,
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-					     minor->debugfs_root, minor->dev,
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-					     nouveau_debugfs_files[i].fops);
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-		if (!dentry)
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-			return -ENOMEM;
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+		debugfs_create_file(nouveau_debugfs_files[i].name,
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+				    S_IRUGO | S_IWUSR,
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+				    minor->debugfs_root, minor->dev,
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+				    nouveau_debugfs_files[i].fops);
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 	}
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-	return drm_debugfs_create_files(nouveau_debugfs_list,
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-					NOUVEAU_DEBUGFS_ENTRIES,
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-					minor->debugfs_root, minor);
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+	drm_debugfs_create_files(nouveau_debugfs_list,
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+				 NOUVEAU_DEBUGFS_ENTRIES,
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+				 minor->debugfs_root, minor);
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+
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+	/* Set the size of the vbios since we know it, and it's confusing to
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+	 * userspace if it wants to seek() but the file has a length of 0
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+	 */
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+	dentry = debugfs_lookup("vbios.rom", minor->debugfs_root);
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+	if (!dentry)
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+		return;
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+
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+	d_inode(dentry)->i_size = drm->vbios.length;
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+	dput(dentry);
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 }
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 int
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@@ -229,7 +261,7 @@
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 	if (!drm->debugfs)
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 		return -ENOMEM;
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-	ret = nvif_object_init(&drm->client.device.object, 0,
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+	ret = nvif_object_ctor(&drm->client.device.object, "debugfsCtrl", 0,
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 			       NVIF_CLASS_CONTROL, NULL, 0,
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 			       &drm->debugfs->ctrl);
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 	if (ret)
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@@ -242,7 +274,7 @@
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 nouveau_debugfs_fini(struct nouveau_drm *drm)
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 {
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 	if (drm->debugfs && drm->debugfs->ctrl.priv)
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-		nvif_object_fini(&drm->debugfs->ctrl);
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+		nvif_object_dtor(&drm->debugfs->ctrl);
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 	kfree(drm->debugfs);
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 	drm->debugfs = NULL;