1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2017 James.Bottomley@HansenPartnership.com
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun #include <linux/slab.h>
6*4882a593Smuzhiyun #include "tpm-dev.h"
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun struct tpmrm_priv {
9*4882a593Smuzhiyun struct file_priv priv;
10*4882a593Smuzhiyun struct tpm_space space;
11*4882a593Smuzhiyun };
12*4882a593Smuzhiyun
tpmrm_open(struct inode * inode,struct file * file)13*4882a593Smuzhiyun static int tpmrm_open(struct inode *inode, struct file *file)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun struct tpm_chip *chip;
16*4882a593Smuzhiyun struct tpmrm_priv *priv;
17*4882a593Smuzhiyun int rc;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun chip = container_of(inode->i_cdev, struct tpm_chip, cdevs);
20*4882a593Smuzhiyun priv = kzalloc(sizeof(*priv), GFP_KERNEL);
21*4882a593Smuzhiyun if (priv == NULL)
22*4882a593Smuzhiyun return -ENOMEM;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun rc = tpm2_init_space(&priv->space, TPM2_SPACE_BUFFER_SIZE);
25*4882a593Smuzhiyun if (rc) {
26*4882a593Smuzhiyun kfree(priv);
27*4882a593Smuzhiyun return -ENOMEM;
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun tpm_common_open(file, chip, &priv->priv, &priv->space);
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun return 0;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
tpmrm_release(struct inode * inode,struct file * file)35*4882a593Smuzhiyun static int tpmrm_release(struct inode *inode, struct file *file)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun struct file_priv *fpriv = file->private_data;
38*4882a593Smuzhiyun struct tpmrm_priv *priv = container_of(fpriv, struct tpmrm_priv, priv);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun tpm_common_release(file, fpriv);
41*4882a593Smuzhiyun tpm2_del_space(fpriv->chip, &priv->space);
42*4882a593Smuzhiyun kfree(priv);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun return 0;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun const struct file_operations tpmrm_fops = {
48*4882a593Smuzhiyun .owner = THIS_MODULE,
49*4882a593Smuzhiyun .llseek = no_llseek,
50*4882a593Smuzhiyun .open = tpmrm_open,
51*4882a593Smuzhiyun .read = tpm_common_read,
52*4882a593Smuzhiyun .write = tpm_common_write,
53*4882a593Smuzhiyun .poll = tpm_common_poll,
54*4882a593Smuzhiyun .release = tpmrm_release,
55*4882a593Smuzhiyun };
56