diff options
| author | Tadeusz Struk <tadeusz.struk@intel.com> | 2018-09-10 10:18:33 -0700 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2018-10-05 13:47:33 +0300 |
| commit | 9e1b74a63f7760b525295161fc608b19b8ee19c4 (patch) | |
| tree | 1e718fb6f19e74e449bf1a61a65621e23704f751 /drivers/char/tpm/tpm-dev.h | |
| parent | c3d477a725ef6b3d17609d5dafc644cccc070cb9 (diff) | |
tpm: add support for nonblocking operation
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>
Diffstat (limited to 'drivers/char/tpm/tpm-dev.h')
| -rw-r--r-- | drivers/char/tpm/tpm-dev.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/char/tpm/tpm-dev.h b/drivers/char/tpm/tpm-dev.h index 4048677bbd78..a126b575cb8c 100644 --- a/drivers/char/tpm/tpm-dev.h +++ b/drivers/char/tpm/tpm-dev.h @@ -2,18 +2,22 @@ #ifndef _TPM_DEV_H #define _TPM_DEV_H +#include <linux/poll.h> #include "tpm.h" struct file_priv { struct tpm_chip *chip; struct tpm_space *space; - /* Data passed to and from the tpm via the read/write calls */ - size_t data_pending; + /* Holds the amount of data passed or an error code from async op */ + ssize_t data_pending; struct mutex buffer_mutex; struct timer_list user_read_timer; /* user needs to claim result */ - struct work_struct work; + struct work_struct timeout_work; + struct work_struct async_work; + wait_queue_head_t async_wait; + bool command_enqueued; u8 data_buffer[TPM_BUFSIZE]; }; @@ -24,6 +28,7 @@ ssize_t tpm_common_read(struct file *file, char __user *buf, size_t size, loff_t *off); ssize_t tpm_common_write(struct file *file, const char __user *buf, size_t size, loff_t *off); -void tpm_common_release(struct file *file, struct file_priv *priv); +__poll_t tpm_common_poll(struct file *file, poll_table *wait); +void tpm_common_release(struct file *file, struct file_priv *priv); #endif |