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9e1b74a63f
Currently the TPM driver only supports blocking calls, which doesn't allow asynchronous IO operations to the TPM hardware. This patch changes it and adds support for nonblocking write and a new poll function to enable applications, which want to take advantage of this. Tested-by: Philip Tricca <philip.b.tricca@intel.com> Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off--by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
35 lines
991 B
C
35 lines
991 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TPM_DEV_H
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#define _TPM_DEV_H
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#include <linux/poll.h>
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#include "tpm.h"
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struct file_priv {
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struct tpm_chip *chip;
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struct tpm_space *space;
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/* Holds the amount of data passed or an error code from async op */
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ssize_t data_pending;
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struct mutex buffer_mutex;
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struct timer_list user_read_timer; /* user needs to claim result */
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struct work_struct timeout_work;
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struct work_struct async_work;
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wait_queue_head_t async_wait;
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bool command_enqueued;
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u8 data_buffer[TPM_BUFSIZE];
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};
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void tpm_common_open(struct file *file, struct tpm_chip *chip,
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struct file_priv *priv, struct tpm_space *space);
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ssize_t tpm_common_read(struct file *file, char __user *buf,
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size_t size, loff_t *off);
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ssize_t tpm_common_write(struct file *file, const char __user *buf,
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size_t size, loff_t *off);
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__poll_t tpm_common_poll(struct file *file, poll_table *wait);
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void tpm_common_release(struct file *file, struct file_priv *priv);
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#endif
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