Lines Matching +full:off +full:- +full:chip
1 // SPDX-License-Identifier: GPL-2.0-only
20 #include "tpm-dev.h"
24 static ssize_t tpm_dev_transmit(struct tpm_chip *chip, struct tpm_space *space, in tpm_dev_transmit() argument
30 if (chip->flags & TPM_CHIP_FLAG_TPM2) in tpm_dev_transmit()
31 tpm2_end_auth_session(chip); in tpm_dev_transmit()
33 ret = tpm2_prepare_space(chip, space, buf, bufsiz); in tpm_dev_transmit()
35 * response with a TPM2_RC_COMMAND_CODE return for user-space. in tpm_dev_transmit()
37 if (ret == -EOPNOTSUPP) { in tpm_dev_transmit()
38 header->length = cpu_to_be32(sizeof(*header)); in tpm_dev_transmit()
39 header->tag = cpu_to_be16(TPM2_ST_NO_SESSIONS); in tpm_dev_transmit()
40 header->return_code = cpu_to_be32(TPM2_RC_COMMAND_CODE | in tpm_dev_transmit()
47 len = tpm_transmit(chip, buf, bufsiz); in tpm_dev_transmit()
52 ret = tpm2_commit_space(chip, space, buf, &len); in tpm_dev_transmit()
54 tpm2_flush_space(chip); in tpm_dev_transmit()
66 mutex_lock(&priv->buffer_mutex); in tpm_dev_async_work()
67 priv->command_enqueued = false; in tpm_dev_async_work()
68 ret = tpm_try_get_ops(priv->chip); in tpm_dev_async_work()
70 priv->response_length = ret; in tpm_dev_async_work()
74 ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer, in tpm_dev_async_work()
75 sizeof(priv->data_buffer)); in tpm_dev_async_work()
76 tpm_put_ops(priv->chip); in tpm_dev_async_work()
84 priv->response_length = ret; in tpm_dev_async_work()
85 mod_timer(&priv->user_read_timer, jiffies + (120 * HZ)); in tpm_dev_async_work()
88 mutex_unlock(&priv->buffer_mutex); in tpm_dev_async_work()
89 wake_up_interruptible(&priv->async_wait); in tpm_dev_async_work()
99 schedule_work(&priv->timeout_work); in user_reader_timeout()
107 mutex_lock(&priv->buffer_mutex); in tpm_timeout_work()
108 priv->response_read = true; in tpm_timeout_work()
109 priv->response_length = 0; in tpm_timeout_work()
110 memset(priv->data_buffer, 0, sizeof(priv->data_buffer)); in tpm_timeout_work()
111 mutex_unlock(&priv->buffer_mutex); in tpm_timeout_work()
112 wake_up_interruptible(&priv->async_wait); in tpm_timeout_work()
115 void tpm_common_open(struct file *file, struct tpm_chip *chip, in tpm_common_open() argument
118 priv->chip = chip; in tpm_common_open()
119 priv->space = space; in tpm_common_open()
120 priv->response_read = true; in tpm_common_open()
122 mutex_init(&priv->buffer_mutex); in tpm_common_open()
123 timer_setup(&priv->user_read_timer, user_reader_timeout, 0); in tpm_common_open()
124 INIT_WORK(&priv->timeout_work, tpm_timeout_work); in tpm_common_open()
125 INIT_WORK(&priv->async_work, tpm_dev_async_work); in tpm_common_open()
126 init_waitqueue_head(&priv->async_wait); in tpm_common_open()
127 file->private_data = priv; in tpm_common_open()
131 size_t size, loff_t *off) in tpm_common_read() argument
133 struct file_priv *priv = file->private_data; in tpm_common_read()
137 mutex_lock(&priv->buffer_mutex); in tpm_common_read()
139 if (priv->response_length) { in tpm_common_read()
140 priv->response_read = true; in tpm_common_read()
142 ret_size = min_t(ssize_t, size, priv->response_length); in tpm_common_read()
144 priv->response_length = 0; in tpm_common_read()
148 rc = copy_to_user(buf, priv->data_buffer + *off, ret_size); in tpm_common_read()
150 memset(priv->data_buffer, 0, TPM_BUFSIZE); in tpm_common_read()
151 priv->response_length = 0; in tpm_common_read()
152 ret_size = -EFAULT; in tpm_common_read()
154 memset(priv->data_buffer + *off, 0, ret_size); in tpm_common_read()
155 priv->response_length -= ret_size; in tpm_common_read()
156 *off += ret_size; in tpm_common_read()
161 if (!priv->response_length) { in tpm_common_read()
162 *off = 0; in tpm_common_read()
163 timer_delete_sync(&priv->user_read_timer); in tpm_common_read()
164 flush_work(&priv->timeout_work); in tpm_common_read()
166 mutex_unlock(&priv->buffer_mutex); in tpm_common_read()
171 size_t size, loff_t *off) in tpm_common_write() argument
173 struct file_priv *priv = file->private_data; in tpm_common_write()
177 return -E2BIG; in tpm_common_write()
179 mutex_lock(&priv->buffer_mutex); in tpm_common_write()
185 if ((!priv->response_read && priv->response_length) || in tpm_common_write()
186 priv->command_enqueued) { in tpm_common_write()
187 ret = -EBUSY; in tpm_common_write()
191 if (copy_from_user(priv->data_buffer, buf, size)) { in tpm_common_write()
192 ret = -EFAULT; in tpm_common_write()
197 size < be32_to_cpu(*((__be32 *)(priv->data_buffer + 2)))) { in tpm_common_write()
198 ret = -EINVAL; in tpm_common_write()
202 priv->response_length = 0; in tpm_common_write()
203 priv->response_read = false; in tpm_common_write()
204 *off = 0; in tpm_common_write()
212 if (file->f_flags & O_NONBLOCK) { in tpm_common_write()
213 priv->command_enqueued = true; in tpm_common_write()
214 queue_work(tpm_dev_wq, &priv->async_work); in tpm_common_write()
215 mutex_unlock(&priv->buffer_mutex); in tpm_common_write()
223 if (tpm_try_get_ops(priv->chip)) { in tpm_common_write()
224 ret = -EPIPE; in tpm_common_write()
228 ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer, in tpm_common_write()
229 sizeof(priv->data_buffer)); in tpm_common_write()
230 tpm_put_ops(priv->chip); in tpm_common_write()
233 priv->response_length = ret; in tpm_common_write()
234 mod_timer(&priv->user_read_timer, jiffies + (120 * HZ)); in tpm_common_write()
238 mutex_unlock(&priv->buffer_mutex); in tpm_common_write()
244 struct file_priv *priv = file->private_data; in tpm_common_poll()
247 poll_wait(file, &priv->async_wait, wait); in tpm_common_poll()
248 mutex_lock(&priv->buffer_mutex); in tpm_common_poll()
255 if (priv->response_length) in tpm_common_poll()
260 mutex_unlock(&priv->buffer_mutex); in tpm_common_poll()
269 flush_work(&priv->async_work); in tpm_common_release()
270 timer_delete_sync(&priv->user_read_timer); in tpm_common_release()
271 flush_work(&priv->timeout_work); in tpm_common_release()
272 file->private_data = NULL; in tpm_common_release()
273 priv->response_length = 0; in tpm_common_release()
280 return !tpm_dev_wq ? -ENOMEM : 0; in tpm_dev_common_init()