Enric Balletbo i Serra | cc2db07 | 2019-01-29 10:38:13 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | // Debug logs for the ChromeOS EC |
| 3 | // |
| 4 | // Copyright (C) 2015 Google, Inc. |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 5 | |
| 6 | #include <linux/circ_buf.h> |
| 7 | #include <linux/debugfs.h> |
| 8 | #include <linux/delay.h> |
| 9 | #include <linux/fs.h> |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 10 | #include <linux/module.h> |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 11 | #include <linux/mutex.h> |
Enric Balletbo i Serra | 840d9f1 | 2019-09-02 11:53:05 +0200 | [diff] [blame] | 12 | #include <linux/platform_data/cros_ec_commands.h> |
| 13 | #include <linux/platform_data/cros_ec_proto.h> |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 14 | #include <linux/platform_device.h> |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 15 | #include <linux/poll.h> |
| 16 | #include <linux/sched.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/wait.h> |
| 19 | |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 20 | #define DRV_NAME "cros-ec-debugfs" |
| 21 | |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 22 | #define LOG_SHIFT 14 |
| 23 | #define LOG_SIZE (1 << LOG_SHIFT) |
| 24 | #define LOG_POLL_SEC 10 |
| 25 | |
| 26 | #define CIRC_ADD(idx, size, value) (((idx) + (value)) & ((size) - 1)) |
| 27 | |
Enric Balletbo i Serra | cb78a16 | 2019-06-14 11:51:24 +0200 | [diff] [blame] | 28 | /** |
| 29 | * struct cros_ec_debugfs - EC debugging information. |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 30 | * |
| 31 | * @ec: EC device this debugfs information belongs to |
| 32 | * @dir: dentry for debugfs files |
| 33 | * @log_buffer: circular buffer for console log information |
| 34 | * @read_msg: preallocated EC command and buffer to read console log |
| 35 | * @log_mutex: mutex to protect circular buffer |
| 36 | * @log_wq: waitqueue for log readers |
| 37 | * @log_poll_work: recurring task to poll EC for new console log data |
Nicolas Boichat | 6e49410 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 38 | * @panicinfo_blob: panicinfo debugfs blob |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 39 | */ |
| 40 | struct cros_ec_debugfs { |
| 41 | struct cros_ec_dev *ec; |
| 42 | struct dentry *dir; |
Nicolas Boichat | 6e49410 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 43 | /* EC log */ |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 44 | struct circ_buf log_buffer; |
| 45 | struct cros_ec_command *read_msg; |
| 46 | struct mutex log_mutex; |
| 47 | wait_queue_head_t log_wq; |
| 48 | struct delayed_work log_poll_work; |
Nicolas Boichat | 6e49410 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 49 | /* EC panicinfo */ |
| 50 | struct debugfs_blob_wrapper panicinfo_blob; |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 51 | }; |
| 52 | |
| 53 | /* |
| 54 | * We need to make sure that the EC log buffer on the UART is large enough, |
| 55 | * so that it is unlikely enough to overlow within LOG_POLL_SEC. |
| 56 | */ |
| 57 | static void cros_ec_console_log_work(struct work_struct *__work) |
| 58 | { |
| 59 | struct cros_ec_debugfs *debug_info = |
| 60 | container_of(to_delayed_work(__work), |
| 61 | struct cros_ec_debugfs, |
| 62 | log_poll_work); |
| 63 | struct cros_ec_dev *ec = debug_info->ec; |
| 64 | struct circ_buf *cb = &debug_info->log_buffer; |
| 65 | struct cros_ec_command snapshot_msg = { |
| 66 | .command = EC_CMD_CONSOLE_SNAPSHOT + ec->cmd_offset, |
| 67 | }; |
| 68 | |
| 69 | struct ec_params_console_read_v1 *read_params = |
| 70 | (struct ec_params_console_read_v1 *)debug_info->read_msg->data; |
| 71 | uint8_t *ec_buffer = (uint8_t *)debug_info->read_msg->data; |
| 72 | int idx; |
| 73 | int buf_space; |
| 74 | int ret; |
| 75 | |
Enric Balletbo i Serra | 81f6ec2 | 2019-04-15 23:35:06 +0200 | [diff] [blame] | 76 | ret = cros_ec_cmd_xfer_status(ec->ec_dev, &snapshot_msg); |
| 77 | if (ret < 0) |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 78 | goto resched; |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 79 | |
| 80 | /* Loop until we have read everything, or there's an error. */ |
| 81 | mutex_lock(&debug_info->log_mutex); |
| 82 | buf_space = CIRC_SPACE(cb->head, cb->tail, LOG_SIZE); |
| 83 | |
| 84 | while (1) { |
| 85 | if (!buf_space) { |
| 86 | dev_info_once(ec->dev, |
| 87 | "Some logs may have been dropped...\n"); |
| 88 | break; |
| 89 | } |
| 90 | |
| 91 | memset(read_params, '\0', sizeof(*read_params)); |
| 92 | read_params->subcmd = CONSOLE_READ_RECENT; |
Enric Balletbo i Serra | 81f6ec2 | 2019-04-15 23:35:06 +0200 | [diff] [blame] | 93 | ret = cros_ec_cmd_xfer_status(ec->ec_dev, |
| 94 | debug_info->read_msg); |
| 95 | if (ret < 0) |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 96 | break; |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 97 | |
| 98 | /* If the buffer is empty, we're done here. */ |
| 99 | if (ret == 0 || ec_buffer[0] == '\0') |
| 100 | break; |
| 101 | |
| 102 | idx = 0; |
| 103 | while (idx < ret && ec_buffer[idx] != '\0' && buf_space > 0) { |
| 104 | cb->buf[cb->head] = ec_buffer[idx]; |
| 105 | cb->head = CIRC_ADD(cb->head, LOG_SIZE, 1); |
| 106 | idx++; |
| 107 | buf_space--; |
| 108 | } |
| 109 | |
| 110 | wake_up(&debug_info->log_wq); |
| 111 | } |
| 112 | |
| 113 | mutex_unlock(&debug_info->log_mutex); |
| 114 | |
| 115 | resched: |
| 116 | schedule_delayed_work(&debug_info->log_poll_work, |
| 117 | msecs_to_jiffies(LOG_POLL_SEC * 1000)); |
| 118 | } |
| 119 | |
| 120 | static int cros_ec_console_log_open(struct inode *inode, struct file *file) |
| 121 | { |
| 122 | file->private_data = inode->i_private; |
| 123 | |
Kirill Smelkov | c5bf68f | 2019-03-26 23:51:19 +0300 | [diff] [blame] | 124 | return stream_open(inode, file); |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | static ssize_t cros_ec_console_log_read(struct file *file, char __user *buf, |
| 128 | size_t count, loff_t *ppos) |
| 129 | { |
| 130 | struct cros_ec_debugfs *debug_info = file->private_data; |
| 131 | struct circ_buf *cb = &debug_info->log_buffer; |
| 132 | ssize_t ret; |
| 133 | |
| 134 | mutex_lock(&debug_info->log_mutex); |
| 135 | |
| 136 | while (!CIRC_CNT(cb->head, cb->tail, LOG_SIZE)) { |
| 137 | if (file->f_flags & O_NONBLOCK) { |
| 138 | ret = -EAGAIN; |
| 139 | goto error; |
| 140 | } |
| 141 | |
| 142 | mutex_unlock(&debug_info->log_mutex); |
| 143 | |
| 144 | ret = wait_event_interruptible(debug_info->log_wq, |
| 145 | CIRC_CNT(cb->head, cb->tail, LOG_SIZE)); |
| 146 | if (ret < 0) |
| 147 | return ret; |
| 148 | |
| 149 | mutex_lock(&debug_info->log_mutex); |
| 150 | } |
| 151 | |
| 152 | /* Only copy until the end of the circular buffer, and let userspace |
| 153 | * retry to get the rest of the data. |
| 154 | */ |
| 155 | ret = min_t(size_t, CIRC_CNT_TO_END(cb->head, cb->tail, LOG_SIZE), |
| 156 | count); |
| 157 | |
| 158 | if (copy_to_user(buf, cb->buf + cb->tail, ret)) { |
| 159 | ret = -EFAULT; |
| 160 | goto error; |
| 161 | } |
| 162 | |
| 163 | cb->tail = CIRC_ADD(cb->tail, LOG_SIZE, ret); |
| 164 | |
| 165 | error: |
| 166 | mutex_unlock(&debug_info->log_mutex); |
| 167 | return ret; |
| 168 | } |
| 169 | |
Al Viro | afc9a42 | 2017-07-03 06:39:46 -0400 | [diff] [blame] | 170 | static __poll_t cros_ec_console_log_poll(struct file *file, |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 171 | poll_table *wait) |
| 172 | { |
| 173 | struct cros_ec_debugfs *debug_info = file->private_data; |
Al Viro | afc9a42 | 2017-07-03 06:39:46 -0400 | [diff] [blame] | 174 | __poll_t mask = 0; |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 175 | |
| 176 | poll_wait(file, &debug_info->log_wq, wait); |
| 177 | |
| 178 | mutex_lock(&debug_info->log_mutex); |
| 179 | if (CIRC_CNT(debug_info->log_buffer.head, |
| 180 | debug_info->log_buffer.tail, |
| 181 | LOG_SIZE)) |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame] | 182 | mask |= EPOLLIN | EPOLLRDNORM; |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 183 | mutex_unlock(&debug_info->log_mutex); |
| 184 | |
| 185 | return mask; |
| 186 | } |
| 187 | |
| 188 | static int cros_ec_console_log_release(struct inode *inode, struct file *file) |
| 189 | { |
| 190 | return 0; |
| 191 | } |
| 192 | |
Shawn Nematbakhsh | b082b2e | 2018-03-23 18:42:46 +0100 | [diff] [blame] | 193 | static ssize_t cros_ec_pdinfo_read(struct file *file, |
| 194 | char __user *user_buf, |
| 195 | size_t count, |
| 196 | loff_t *ppos) |
| 197 | { |
| 198 | char read_buf[EC_USB_PD_MAX_PORTS * 40], *p = read_buf; |
| 199 | struct cros_ec_debugfs *debug_info = file->private_data; |
| 200 | struct cros_ec_device *ec_dev = debug_info->ec->ec_dev; |
| 201 | struct { |
| 202 | struct cros_ec_command msg; |
| 203 | union { |
| 204 | struct ec_response_usb_pd_control_v1 resp; |
| 205 | struct ec_params_usb_pd_control params; |
| 206 | }; |
| 207 | } __packed ec_buf; |
| 208 | struct cros_ec_command *msg; |
| 209 | struct ec_response_usb_pd_control_v1 *resp; |
| 210 | struct ec_params_usb_pd_control *params; |
| 211 | int i; |
| 212 | |
| 213 | msg = &ec_buf.msg; |
| 214 | params = (struct ec_params_usb_pd_control *)msg->data; |
| 215 | resp = (struct ec_response_usb_pd_control_v1 *)msg->data; |
| 216 | |
| 217 | msg->command = EC_CMD_USB_PD_CONTROL; |
| 218 | msg->version = 1; |
| 219 | msg->insize = sizeof(*resp); |
| 220 | msg->outsize = sizeof(*params); |
| 221 | |
| 222 | /* |
| 223 | * Read status from all PD ports until failure, typically caused |
| 224 | * by attempting to read status on a port that doesn't exist. |
| 225 | */ |
| 226 | for (i = 0; i < EC_USB_PD_MAX_PORTS; ++i) { |
| 227 | params->port = i; |
| 228 | params->role = 0; |
| 229 | params->mux = 0; |
| 230 | params->swap = 0; |
| 231 | |
| 232 | if (cros_ec_cmd_xfer_status(ec_dev, msg) < 0) |
| 233 | break; |
| 234 | |
| 235 | p += scnprintf(p, sizeof(read_buf) + read_buf - p, |
| 236 | "p%d: %s en:%.2x role:%.2x pol:%.2x\n", i, |
| 237 | resp->state, resp->enabled, resp->role, |
| 238 | resp->polarity); |
| 239 | } |
| 240 | |
| 241 | return simple_read_from_buffer(user_buf, count, ppos, |
| 242 | read_buf, p - read_buf); |
| 243 | } |
| 244 | |
Gwendal Grignou | d378cdd | 2020-05-26 11:53:28 -0700 | [diff] [blame] | 245 | static bool cros_ec_uptime_is_supported(struct cros_ec_device *ec_dev) |
| 246 | { |
| 247 | struct { |
| 248 | struct cros_ec_command cmd; |
| 249 | struct ec_response_uptime_info resp; |
| 250 | } __packed msg = {}; |
| 251 | int ret; |
| 252 | |
| 253 | msg.cmd.command = EC_CMD_GET_UPTIME_INFO; |
| 254 | msg.cmd.insize = sizeof(msg.resp); |
| 255 | |
| 256 | ret = cros_ec_cmd_xfer_status(ec_dev, &msg.cmd); |
| 257 | if (ret == -EPROTO && msg.cmd.result == EC_RES_INVALID_COMMAND) |
| 258 | return false; |
| 259 | |
| 260 | /* Other errors maybe a transient error, do not rule about support. */ |
| 261 | return true; |
| 262 | } |
| 263 | |
Tim Wawrzynczak | e90716a | 2019-06-13 11:57:36 -0600 | [diff] [blame] | 264 | static ssize_t cros_ec_uptime_read(struct file *file, char __user *user_buf, |
| 265 | size_t count, loff_t *ppos) |
| 266 | { |
| 267 | struct cros_ec_debugfs *debug_info = file->private_data; |
| 268 | struct cros_ec_device *ec_dev = debug_info->ec->ec_dev; |
| 269 | struct { |
| 270 | struct cros_ec_command cmd; |
| 271 | struct ec_response_uptime_info resp; |
| 272 | } __packed msg = {}; |
| 273 | struct ec_response_uptime_info *resp; |
| 274 | char read_buf[32]; |
| 275 | int ret; |
| 276 | |
| 277 | resp = (struct ec_response_uptime_info *)&msg.resp; |
| 278 | |
| 279 | msg.cmd.command = EC_CMD_GET_UPTIME_INFO; |
| 280 | msg.cmd.insize = sizeof(*resp); |
| 281 | |
| 282 | ret = cros_ec_cmd_xfer_status(ec_dev, &msg.cmd); |
| 283 | if (ret < 0) |
| 284 | return ret; |
| 285 | |
| 286 | ret = scnprintf(read_buf, sizeof(read_buf), "%u\n", |
| 287 | resp->time_since_ec_boot_ms); |
| 288 | |
| 289 | return simple_read_from_buffer(user_buf, count, ppos, read_buf, ret); |
| 290 | } |
| 291 | |
YueHaibing | 81bc8c0 | 2019-05-30 16:49:32 +0800 | [diff] [blame] | 292 | static const struct file_operations cros_ec_console_log_fops = { |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 293 | .owner = THIS_MODULE, |
| 294 | .open = cros_ec_console_log_open, |
| 295 | .read = cros_ec_console_log_read, |
| 296 | .llseek = no_llseek, |
| 297 | .poll = cros_ec_console_log_poll, |
| 298 | .release = cros_ec_console_log_release, |
| 299 | }; |
| 300 | |
YueHaibing | 81bc8c0 | 2019-05-30 16:49:32 +0800 | [diff] [blame] | 301 | static const struct file_operations cros_ec_pdinfo_fops = { |
Shawn Nematbakhsh | b082b2e | 2018-03-23 18:42:46 +0100 | [diff] [blame] | 302 | .owner = THIS_MODULE, |
| 303 | .open = simple_open, |
| 304 | .read = cros_ec_pdinfo_read, |
| 305 | .llseek = default_llseek, |
| 306 | }; |
| 307 | |
kbuild test robot | 35b52b3 | 2019-06-18 10:32:31 +0200 | [diff] [blame] | 308 | static const struct file_operations cros_ec_uptime_fops = { |
Tim Wawrzynczak | e90716a | 2019-06-13 11:57:36 -0600 | [diff] [blame] | 309 | .owner = THIS_MODULE, |
| 310 | .open = simple_open, |
| 311 | .read = cros_ec_uptime_read, |
| 312 | .llseek = default_llseek, |
| 313 | }; |
| 314 | |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 315 | static int ec_read_version_supported(struct cros_ec_dev *ec) |
| 316 | { |
| 317 | struct ec_params_get_cmd_versions_v1 *params; |
| 318 | struct ec_response_get_cmd_versions *response; |
| 319 | int ret; |
| 320 | |
| 321 | struct cros_ec_command *msg; |
| 322 | |
Shawn Nematbakhsh | 73b44f4 | 2017-02-16 09:49:29 -0800 | [diff] [blame] | 323 | msg = kzalloc(sizeof(*msg) + max(sizeof(*params), sizeof(*response)), |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 324 | GFP_KERNEL); |
| 325 | if (!msg) |
| 326 | return 0; |
| 327 | |
| 328 | msg->command = EC_CMD_GET_CMD_VERSIONS + ec->cmd_offset; |
Shawn Nematbakhsh | 73b44f4 | 2017-02-16 09:49:29 -0800 | [diff] [blame] | 329 | msg->outsize = sizeof(*params); |
| 330 | msg->insize = sizeof(*response); |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 331 | |
| 332 | params = (struct ec_params_get_cmd_versions_v1 *)msg->data; |
| 333 | params->cmd = EC_CMD_CONSOLE_READ; |
| 334 | response = (struct ec_response_get_cmd_versions *)msg->data; |
| 335 | |
Enric Balletbo i Serra | 81f6ec2 | 2019-04-15 23:35:06 +0200 | [diff] [blame] | 336 | ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg) >= 0 && |
| 337 | response->version_mask & EC_VER_MASK(1); |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 338 | |
| 339 | kfree(msg); |
| 340 | |
| 341 | return ret; |
| 342 | } |
| 343 | |
| 344 | static int cros_ec_create_console_log(struct cros_ec_debugfs *debug_info) |
| 345 | { |
| 346 | struct cros_ec_dev *ec = debug_info->ec; |
| 347 | char *buf; |
| 348 | int read_params_size; |
| 349 | int read_response_size; |
| 350 | |
Enric Balletbo i Serra | e43c426 | 2019-04-03 15:47:18 +0200 | [diff] [blame] | 351 | /* |
| 352 | * If the console log feature is not supported return silently and |
| 353 | * don't create the console_log entry. |
| 354 | */ |
| 355 | if (!ec_read_version_supported(ec)) |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 356 | return 0; |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 357 | |
| 358 | buf = devm_kzalloc(ec->dev, LOG_SIZE, GFP_KERNEL); |
| 359 | if (!buf) |
| 360 | return -ENOMEM; |
| 361 | |
| 362 | read_params_size = sizeof(struct ec_params_console_read_v1); |
| 363 | read_response_size = ec->ec_dev->max_response; |
| 364 | debug_info->read_msg = devm_kzalloc(ec->dev, |
| 365 | sizeof(*debug_info->read_msg) + |
| 366 | max(read_params_size, read_response_size), GFP_KERNEL); |
| 367 | if (!debug_info->read_msg) |
| 368 | return -ENOMEM; |
| 369 | |
| 370 | debug_info->read_msg->version = 1; |
| 371 | debug_info->read_msg->command = EC_CMD_CONSOLE_READ + ec->cmd_offset; |
| 372 | debug_info->read_msg->outsize = read_params_size; |
| 373 | debug_info->read_msg->insize = read_response_size; |
| 374 | |
| 375 | debug_info->log_buffer.buf = buf; |
| 376 | debug_info->log_buffer.head = 0; |
| 377 | debug_info->log_buffer.tail = 0; |
| 378 | |
| 379 | mutex_init(&debug_info->log_mutex); |
| 380 | init_waitqueue_head(&debug_info->log_wq); |
| 381 | |
Enric Balletbo i Serra | b18e606 | 2019-04-08 17:05:38 +0200 | [diff] [blame] | 382 | debugfs_create_file("console_log", S_IFREG | 0444, debug_info->dir, |
| 383 | debug_info, &cros_ec_console_log_fops); |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 384 | |
| 385 | INIT_DELAYED_WORK(&debug_info->log_poll_work, |
| 386 | cros_ec_console_log_work); |
| 387 | schedule_delayed_work(&debug_info->log_poll_work, 0); |
| 388 | |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | static void cros_ec_cleanup_console_log(struct cros_ec_debugfs *debug_info) |
| 393 | { |
| 394 | if (debug_info->log_buffer.buf) { |
| 395 | cancel_delayed_work_sync(&debug_info->log_poll_work); |
| 396 | mutex_destroy(&debug_info->log_mutex); |
| 397 | } |
| 398 | } |
| 399 | |
Nicolas Boichat | 6e49410 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 400 | static int cros_ec_create_panicinfo(struct cros_ec_debugfs *debug_info) |
| 401 | { |
| 402 | struct cros_ec_device *ec_dev = debug_info->ec->ec_dev; |
| 403 | int ret; |
| 404 | struct cros_ec_command *msg; |
| 405 | int insize; |
| 406 | |
| 407 | insize = ec_dev->max_response; |
| 408 | |
| 409 | msg = devm_kzalloc(debug_info->ec->dev, |
| 410 | sizeof(*msg) + insize, GFP_KERNEL); |
| 411 | if (!msg) |
| 412 | return -ENOMEM; |
| 413 | |
| 414 | msg->command = EC_CMD_GET_PANIC_INFO; |
| 415 | msg->insize = insize; |
| 416 | |
Enric Balletbo i Serra | 81f6ec2 | 2019-04-15 23:35:06 +0200 | [diff] [blame] | 417 | ret = cros_ec_cmd_xfer_status(ec_dev, msg); |
Nicolas Boichat | 6e49410 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 418 | if (ret < 0) { |
Nicolas Boichat | 6e49410 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 419 | ret = 0; |
| 420 | goto free; |
| 421 | } |
| 422 | |
| 423 | /* No panic data */ |
| 424 | if (ret == 0) |
| 425 | goto free; |
| 426 | |
| 427 | debug_info->panicinfo_blob.data = msg->data; |
| 428 | debug_info->panicinfo_blob.size = ret; |
| 429 | |
Enric Balletbo i Serra | b18e606 | 2019-04-08 17:05:38 +0200 | [diff] [blame] | 430 | debugfs_create_blob("panicinfo", S_IFREG | 0444, debug_info->dir, |
| 431 | &debug_info->panicinfo_blob); |
Nicolas Boichat | 6e49410 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 432 | |
| 433 | return 0; |
| 434 | |
| 435 | free: |
| 436 | devm_kfree(debug_info->ec->dev, msg); |
| 437 | return ret; |
| 438 | } |
| 439 | |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 440 | static int cros_ec_debugfs_probe(struct platform_device *pd) |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 441 | { |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 442 | struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent); |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 443 | struct cros_ec_platform *ec_platform = dev_get_platdata(ec->dev); |
| 444 | const char *name = ec_platform->ec_name; |
| 445 | struct cros_ec_debugfs *debug_info; |
| 446 | int ret; |
| 447 | |
| 448 | debug_info = devm_kzalloc(ec->dev, sizeof(*debug_info), GFP_KERNEL); |
| 449 | if (!debug_info) |
| 450 | return -ENOMEM; |
| 451 | |
| 452 | debug_info->ec = ec; |
| 453 | debug_info->dir = debugfs_create_dir(name, NULL); |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 454 | |
Nicolas Boichat | 6e49410 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 455 | ret = cros_ec_create_panicinfo(debug_info); |
| 456 | if (ret) |
| 457 | goto remove_debugfs; |
| 458 | |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 459 | ret = cros_ec_create_console_log(debug_info); |
| 460 | if (ret) |
| 461 | goto remove_debugfs; |
| 462 | |
Enric Balletbo i Serra | b18e606 | 2019-04-08 17:05:38 +0200 | [diff] [blame] | 463 | debugfs_create_file("pdinfo", 0444, debug_info->dir, debug_info, |
| 464 | &cros_ec_pdinfo_fops); |
Shawn Nematbakhsh | b082b2e | 2018-03-23 18:42:46 +0100 | [diff] [blame] | 465 | |
Gwendal Grignou | d378cdd | 2020-05-26 11:53:28 -0700 | [diff] [blame] | 466 | if (cros_ec_uptime_is_supported(ec->ec_dev)) |
| 467 | debugfs_create_file("uptime", 0444, debug_info->dir, debug_info, |
| 468 | &cros_ec_uptime_fops); |
Tim Wawrzynczak | e90716a | 2019-06-13 11:57:36 -0600 | [diff] [blame] | 469 | |
Evan Green | 8c3166e | 2019-06-27 13:44:45 -0700 | [diff] [blame] | 470 | debugfs_create_x32("last_resume_result", 0444, debug_info->dir, |
| 471 | &ec->ec_dev->last_resume_result); |
| 472 | |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 473 | ec->debug_info = debug_info; |
| 474 | |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 475 | dev_set_drvdata(&pd->dev, ec); |
| 476 | |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 477 | return 0; |
| 478 | |
| 479 | remove_debugfs: |
| 480 | debugfs_remove_recursive(debug_info->dir); |
| 481 | return ret; |
| 482 | } |
| 483 | |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 484 | static int cros_ec_debugfs_remove(struct platform_device *pd) |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 485 | { |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 486 | struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent); |
Eric Caruso | e862645 | 2017-05-16 17:46:48 +0200 | [diff] [blame] | 487 | |
| 488 | debugfs_remove_recursive(ec->debug_info->dir); |
| 489 | cros_ec_cleanup_console_log(ec->debug_info); |
Douglas Anderson | 44d99d7 | 2018-04-18 12:24:00 +0200 | [diff] [blame] | 490 | |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 491 | return 0; |
Douglas Anderson | 44d99d7 | 2018-04-18 12:24:00 +0200 | [diff] [blame] | 492 | } |
Douglas Anderson | 44d99d7 | 2018-04-18 12:24:00 +0200 | [diff] [blame] | 493 | |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 494 | static int __maybe_unused cros_ec_debugfs_suspend(struct device *dev) |
Douglas Anderson | 44d99d7 | 2018-04-18 12:24:00 +0200 | [diff] [blame] | 495 | { |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 496 | struct cros_ec_dev *ec = dev_get_drvdata(dev); |
| 497 | |
Guenter Roeck | 57aeef7 | 2019-03-19 09:32:36 -0700 | [diff] [blame] | 498 | if (ec->debug_info->log_buffer.buf) |
| 499 | cancel_delayed_work_sync(&ec->debug_info->log_poll_work); |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 500 | |
| 501 | return 0; |
Douglas Anderson | 44d99d7 | 2018-04-18 12:24:00 +0200 | [diff] [blame] | 502 | } |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 503 | |
| 504 | static int __maybe_unused cros_ec_debugfs_resume(struct device *dev) |
| 505 | { |
| 506 | struct cros_ec_dev *ec = dev_get_drvdata(dev); |
| 507 | |
Guenter Roeck | 57aeef7 | 2019-03-19 09:32:36 -0700 | [diff] [blame] | 508 | if (ec->debug_info->log_buffer.buf) |
| 509 | schedule_delayed_work(&ec->debug_info->log_poll_work, 0); |
Enric Balletbo i Serra | 6fce0a2 | 2018-12-12 18:33:59 +0100 | [diff] [blame] | 510 | |
| 511 | return 0; |
| 512 | } |
| 513 | |
| 514 | static SIMPLE_DEV_PM_OPS(cros_ec_debugfs_pm_ops, |
| 515 | cros_ec_debugfs_suspend, cros_ec_debugfs_resume); |
| 516 | |
| 517 | static struct platform_driver cros_ec_debugfs_driver = { |
| 518 | .driver = { |
| 519 | .name = DRV_NAME, |
| 520 | .pm = &cros_ec_debugfs_pm_ops, |
| 521 | }, |
| 522 | .probe = cros_ec_debugfs_probe, |
| 523 | .remove = cros_ec_debugfs_remove, |
| 524 | }; |
| 525 | |
| 526 | module_platform_driver(cros_ec_debugfs_driver); |
| 527 | |
| 528 | MODULE_LICENSE("GPL"); |
| 529 | MODULE_DESCRIPTION("Debug logs for ChromeOS EC"); |
| 530 | MODULE_ALIAS("platform:" DRV_NAME); |