1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _TPM_DEV_H
3 #define _TPM_DEV_H
4 
5 #include <linux/poll.h>
6 #include "tpm.h"
7 
8 struct file_priv {
9 	struct tpm_chip *chip;
10 	struct tpm_space *space;
11 
12 	struct mutex buffer_mutex;
13 	struct timer_list user_read_timer;      /* user needs to claim result */
14 	struct work_struct timeout_work;
15 	struct work_struct async_work;
16 	wait_queue_head_t async_wait;
17 	size_t response_length;
18 	bool response_read;
19 	bool command_enqueued;
20 
21 	u8 data_buffer[TPM_BUFSIZE];
22 };
23 
24 void tpm_common_open(struct file *file, struct tpm_chip *chip,
25 		     struct file_priv *priv, struct tpm_space *space);
26 ssize_t tpm_common_read(struct file *file, char __user *buf,
27 			size_t size, loff_t *off);
28 ssize_t tpm_common_write(struct file *file, const char __user *buf,
29 			 size_t size, loff_t *off);
30 __poll_t tpm_common_poll(struct file *file, poll_table *wait);
31 
32 void tpm_common_release(struct file *file, struct file_priv *priv);
33 #endif
34