Lines Matching +full:off +full:- +full:chip
1 // SPDX-License-Identifier: GPL-2.0-only
20 #include "tpm-dev.h"
25 static ssize_t tpm_dev_transmit(struct tpm_chip *chip, struct tpm_space *space, in tpm_dev_transmit() argument
31 ret = tpm2_prepare_space(chip, space, buf, bufsiz); in tpm_dev_transmit()
33 * response with a TPM2_RC_COMMAND_CODE return for user-space. in tpm_dev_transmit()
35 if (ret == -EOPNOTSUPP) { in tpm_dev_transmit()
36 header->length = cpu_to_be32(sizeof(*header)); in tpm_dev_transmit()
37 header->tag = cpu_to_be16(TPM2_ST_NO_SESSIONS); in tpm_dev_transmit()
38 header->return_code = cpu_to_be32(TPM2_RC_COMMAND_CODE | in tpm_dev_transmit()
45 len = tpm_transmit(chip, buf, bufsiz); in tpm_dev_transmit()
50 ret = tpm2_commit_space(chip, space, buf, &len); in tpm_dev_transmit()
62 mutex_lock(&priv->buffer_mutex); in tpm_dev_async_work()
63 priv->command_enqueued = false; in tpm_dev_async_work()
64 ret = tpm_try_get_ops(priv->chip); in tpm_dev_async_work()
66 priv->response_length = ret; in tpm_dev_async_work()
70 ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer, in tpm_dev_async_work()
71 sizeof(priv->data_buffer)); in tpm_dev_async_work()
72 tpm_put_ops(priv->chip); in tpm_dev_async_work()
74 priv->response_length = ret; in tpm_dev_async_work()
75 mod_timer(&priv->user_read_timer, jiffies + (120 * HZ)); in tpm_dev_async_work()
78 mutex_unlock(&priv->buffer_mutex); in tpm_dev_async_work()
79 wake_up_interruptible(&priv->async_wait); in tpm_dev_async_work()
89 schedule_work(&priv->timeout_work); in user_reader_timeout()
97 mutex_lock(&priv->buffer_mutex); in tpm_timeout_work()
98 priv->response_read = true; in tpm_timeout_work()
99 priv->response_length = 0; in tpm_timeout_work()
100 memset(priv->data_buffer, 0, sizeof(priv->data_buffer)); in tpm_timeout_work()
101 mutex_unlock(&priv->buffer_mutex); in tpm_timeout_work()
102 wake_up_interruptible(&priv->async_wait); in tpm_timeout_work()
105 void tpm_common_open(struct file *file, struct tpm_chip *chip, in tpm_common_open() argument
108 priv->chip = chip; in tpm_common_open()
109 priv->space = space; in tpm_common_open()
110 priv->response_read = true; in tpm_common_open()
112 mutex_init(&priv->buffer_mutex); in tpm_common_open()
113 timer_setup(&priv->user_read_timer, user_reader_timeout, 0); in tpm_common_open()
114 INIT_WORK(&priv->timeout_work, tpm_timeout_work); in tpm_common_open()
115 INIT_WORK(&priv->async_work, tpm_dev_async_work); in tpm_common_open()
116 init_waitqueue_head(&priv->async_wait); in tpm_common_open()
117 file->private_data = priv; in tpm_common_open()
121 size_t size, loff_t *off) in tpm_common_read() argument
123 struct file_priv *priv = file->private_data; in tpm_common_read()
127 mutex_lock(&priv->buffer_mutex); in tpm_common_read()
129 if (priv->response_length) { in tpm_common_read()
130 priv->response_read = true; in tpm_common_read()
132 ret_size = min_t(ssize_t, size, priv->response_length); in tpm_common_read()
134 priv->response_length = 0; in tpm_common_read()
138 rc = copy_to_user(buf, priv->data_buffer + *off, ret_size); in tpm_common_read()
140 memset(priv->data_buffer, 0, TPM_BUFSIZE); in tpm_common_read()
141 priv->response_length = 0; in tpm_common_read()
142 ret_size = -EFAULT; in tpm_common_read()
144 memset(priv->data_buffer + *off, 0, ret_size); in tpm_common_read()
145 priv->response_length -= ret_size; in tpm_common_read()
146 *off += ret_size; in tpm_common_read()
151 if (!priv->response_length) { in tpm_common_read()
152 *off = 0; in tpm_common_read()
153 del_singleshot_timer_sync(&priv->user_read_timer); in tpm_common_read()
154 flush_work(&priv->timeout_work); in tpm_common_read()
156 mutex_unlock(&priv->buffer_mutex); in tpm_common_read()
161 size_t size, loff_t *off) in tpm_common_write() argument
163 struct file_priv *priv = file->private_data; in tpm_common_write()
167 return -E2BIG; in tpm_common_write()
169 mutex_lock(&priv->buffer_mutex); in tpm_common_write()
175 if ((!priv->response_read && priv->response_length) || in tpm_common_write()
176 priv->command_enqueued) { in tpm_common_write()
177 ret = -EBUSY; in tpm_common_write()
181 if (copy_from_user(priv->data_buffer, buf, size)) { in tpm_common_write()
182 ret = -EFAULT; in tpm_common_write()
187 size < be32_to_cpu(*((__be32 *)(priv->data_buffer + 2)))) { in tpm_common_write()
188 ret = -EINVAL; in tpm_common_write()
192 priv->response_length = 0; in tpm_common_write()
193 priv->response_read = false; in tpm_common_write()
194 *off = 0; in tpm_common_write()
202 if (file->f_flags & O_NONBLOCK) { in tpm_common_write()
203 priv->command_enqueued = true; in tpm_common_write()
204 queue_work(tpm_dev_wq, &priv->async_work); in tpm_common_write()
205 mutex_unlock(&priv->buffer_mutex); in tpm_common_write()
213 if (tpm_try_get_ops(priv->chip)) { in tpm_common_write()
214 ret = -EPIPE; in tpm_common_write()
218 ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer, in tpm_common_write()
219 sizeof(priv->data_buffer)); in tpm_common_write()
220 tpm_put_ops(priv->chip); in tpm_common_write()
223 priv->response_length = ret; in tpm_common_write()
224 mod_timer(&priv->user_read_timer, jiffies + (120 * HZ)); in tpm_common_write()
228 mutex_unlock(&priv->buffer_mutex); in tpm_common_write()
234 struct file_priv *priv = file->private_data; in tpm_common_poll()
237 poll_wait(file, &priv->async_wait, wait); in tpm_common_poll()
238 mutex_lock(&priv->buffer_mutex); in tpm_common_poll()
245 if (priv->response_length) in tpm_common_poll()
250 mutex_unlock(&priv->buffer_mutex); in tpm_common_poll()
259 flush_work(&priv->async_work); in tpm_common_release()
260 del_singleshot_timer_sync(&priv->user_read_timer); in tpm_common_release()
261 flush_work(&priv->timeout_work); in tpm_common_release()
262 file->private_data = NULL; in tpm_common_release()
263 priv->response_length = 0; in tpm_common_release()
270 return !tpm_dev_wq ? -ENOMEM : 0; in tpm_dev_common_init()