| 1 | /* |
| 2 | * A hwmon driver for the IBM PowerExecutive temperature/power sensors |
| 3 | * Copyright (C) 2007 IBM |
| 4 | * |
| 5 | * Author: Darrick J. Wong <darrick.wong@oracle.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | #include <linux/ipmi.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/hwmon.h> |
| 25 | #include <linux/hwmon-sysfs.h> |
| 26 | #include <linux/jiffies.h> |
| 27 | #include <linux/mutex.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/err.h> |
| 30 | |
| 31 | #define REFRESH_INTERVAL (2 * HZ) |
| 32 | #define DRVNAME "ibmpex" |
| 33 | |
| 34 | #define PEX_GET_VERSION 1 |
| 35 | #define PEX_GET_SENSOR_COUNT 2 |
| 36 | #define PEX_GET_SENSOR_NAME 3 |
| 37 | #define PEX_RESET_HIGH_LOW 4 |
| 38 | #define PEX_GET_SENSOR_DATA 6 |
| 39 | |
| 40 | #define PEX_NET_FUNCTION 0x3A |
| 41 | #define PEX_COMMAND 0x3C |
| 42 | |
| 43 | static inline u16 extract_value(const char *data, int offset) |
| 44 | { |
| 45 | return be16_to_cpup((__be16 *)&data[offset]); |
| 46 | } |
| 47 | |
| 48 | #define TEMP_SENSOR 1 |
| 49 | #define POWER_SENSOR 2 |
| 50 | |
| 51 | #define PEX_SENSOR_TYPE_LEN 3 |
| 52 | static u8 const power_sensor_sig[] = {0x70, 0x77, 0x72}; |
| 53 | static u8 const temp_sensor_sig[] = {0x74, 0x65, 0x6D}; |
| 54 | |
| 55 | #define PEX_MULT_LEN 2 |
| 56 | static u8 const watt_sensor_sig[] = {0x41, 0x43}; |
| 57 | |
| 58 | #define PEX_NUM_SENSOR_FUNCS 3 |
| 59 | static char const * const power_sensor_name_templates[] = { |
| 60 | "%s%d_average", |
| 61 | "%s%d_average_lowest", |
| 62 | "%s%d_average_highest" |
| 63 | }; |
| 64 | static char const * const temp_sensor_name_templates[] = { |
| 65 | "%s%d_input", |
| 66 | "%s%d_input_lowest", |
| 67 | "%s%d_input_highest" |
| 68 | }; |
| 69 | |
| 70 | static void ibmpex_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data); |
| 71 | static void ibmpex_register_bmc(int iface, struct device *dev); |
| 72 | static void ibmpex_bmc_gone(int iface); |
| 73 | |
| 74 | struct ibmpex_sensor_data { |
| 75 | int in_use; |
| 76 | s16 values[PEX_NUM_SENSOR_FUNCS]; |
| 77 | int multiplier; |
| 78 | |
| 79 | struct sensor_device_attribute_2 attr[PEX_NUM_SENSOR_FUNCS]; |
| 80 | }; |
| 81 | |
| 82 | struct ibmpex_bmc_data { |
| 83 | struct list_head list; |
| 84 | struct device *hwmon_dev; |
| 85 | struct device *bmc_device; |
| 86 | struct mutex lock; |
| 87 | char valid; |
| 88 | unsigned long last_updated; /* In jiffies */ |
| 89 | |
| 90 | struct ipmi_addr address; |
| 91 | struct completion read_complete; |
| 92 | ipmi_user_t user; |
| 93 | int interface; |
| 94 | |
| 95 | struct kernel_ipmi_msg tx_message; |
| 96 | unsigned char tx_msg_data[IPMI_MAX_MSG_LENGTH]; |
| 97 | long tx_msgid; |
| 98 | |
| 99 | unsigned char rx_msg_data[IPMI_MAX_MSG_LENGTH]; |
| 100 | unsigned long rx_msg_len; |
| 101 | unsigned char rx_result; |
| 102 | int rx_recv_type; |
| 103 | |
| 104 | unsigned char sensor_major; |
| 105 | unsigned char sensor_minor; |
| 106 | |
| 107 | unsigned char num_sensors; |
| 108 | struct ibmpex_sensor_data *sensors; |
| 109 | }; |
| 110 | |
| 111 | struct ibmpex_driver_data { |
| 112 | struct list_head bmc_data; |
| 113 | struct ipmi_smi_watcher bmc_events; |
| 114 | struct ipmi_user_hndl ipmi_hndlrs; |
| 115 | }; |
| 116 | |
| 117 | static struct ibmpex_driver_data driver_data = { |
| 118 | .bmc_data = LIST_HEAD_INIT(driver_data.bmc_data), |
| 119 | .bmc_events = { |
| 120 | .owner = THIS_MODULE, |
| 121 | .new_smi = ibmpex_register_bmc, |
| 122 | .smi_gone = ibmpex_bmc_gone, |
| 123 | }, |
| 124 | .ipmi_hndlrs = { |
| 125 | .ipmi_recv_hndl = ibmpex_msg_handler, |
| 126 | }, |
| 127 | }; |
| 128 | |
| 129 | static int ibmpex_send_message(struct ibmpex_bmc_data *data) |
| 130 | { |
| 131 | int err; |
| 132 | |
| 133 | err = ipmi_validate_addr(&data->address, sizeof(data->address)); |
| 134 | if (err) |
| 135 | goto out; |
| 136 | |
| 137 | data->tx_msgid++; |
| 138 | err = ipmi_request_settime(data->user, &data->address, data->tx_msgid, |
| 139 | &data->tx_message, data, 0, 0, 0); |
| 140 | if (err) |
| 141 | goto out1; |
| 142 | |
| 143 | return 0; |
| 144 | out1: |
| 145 | dev_err(data->bmc_device, "request_settime=%x\n", err); |
| 146 | return err; |
| 147 | out: |
| 148 | dev_err(data->bmc_device, "validate_addr=%x\n", err); |
| 149 | return err; |
| 150 | } |
| 151 | |
| 152 | static int ibmpex_ver_check(struct ibmpex_bmc_data *data) |
| 153 | { |
| 154 | data->tx_msg_data[0] = PEX_GET_VERSION; |
| 155 | data->tx_message.data_len = 1; |
| 156 | ibmpex_send_message(data); |
| 157 | |
| 158 | wait_for_completion(&data->read_complete); |
| 159 | |
| 160 | if (data->rx_result || data->rx_msg_len != 6) |
| 161 | return -ENOENT; |
| 162 | |
| 163 | data->sensor_major = data->rx_msg_data[0]; |
| 164 | data->sensor_minor = data->rx_msg_data[1]; |
| 165 | |
| 166 | dev_info(data->bmc_device, |
| 167 | "Found BMC with sensor interface v%d.%d %d-%02d-%02d on interface %d\n", |
| 168 | data->sensor_major, |
| 169 | data->sensor_minor, |
| 170 | extract_value(data->rx_msg_data, 2), |
| 171 | data->rx_msg_data[4], |
| 172 | data->rx_msg_data[5], |
| 173 | data->interface); |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | static int ibmpex_query_sensor_count(struct ibmpex_bmc_data *data) |
| 179 | { |
| 180 | data->tx_msg_data[0] = PEX_GET_SENSOR_COUNT; |
| 181 | data->tx_message.data_len = 1; |
| 182 | ibmpex_send_message(data); |
| 183 | |
| 184 | wait_for_completion(&data->read_complete); |
| 185 | |
| 186 | if (data->rx_result || data->rx_msg_len != 1) |
| 187 | return -ENOENT; |
| 188 | |
| 189 | return data->rx_msg_data[0]; |
| 190 | } |
| 191 | |
| 192 | static int ibmpex_query_sensor_name(struct ibmpex_bmc_data *data, int sensor) |
| 193 | { |
| 194 | data->tx_msg_data[0] = PEX_GET_SENSOR_NAME; |
| 195 | data->tx_msg_data[1] = sensor; |
| 196 | data->tx_message.data_len = 2; |
| 197 | ibmpex_send_message(data); |
| 198 | |
| 199 | wait_for_completion(&data->read_complete); |
| 200 | |
| 201 | if (data->rx_result || data->rx_msg_len < 1) |
| 202 | return -ENOENT; |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | static int ibmpex_query_sensor_data(struct ibmpex_bmc_data *data, int sensor) |
| 208 | { |
| 209 | data->tx_msg_data[0] = PEX_GET_SENSOR_DATA; |
| 210 | data->tx_msg_data[1] = sensor; |
| 211 | data->tx_message.data_len = 2; |
| 212 | ibmpex_send_message(data); |
| 213 | |
| 214 | wait_for_completion(&data->read_complete); |
| 215 | |
| 216 | if (data->rx_result || data->rx_msg_len < 26) { |
| 217 | dev_err(data->bmc_device, "Error reading sensor %d.\n", |
| 218 | sensor); |
| 219 | return -ENOENT; |
| 220 | } |
| 221 | |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | static int ibmpex_reset_high_low_data(struct ibmpex_bmc_data *data) |
| 226 | { |
| 227 | data->tx_msg_data[0] = PEX_RESET_HIGH_LOW; |
| 228 | data->tx_message.data_len = 1; |
| 229 | ibmpex_send_message(data); |
| 230 | |
| 231 | wait_for_completion(&data->read_complete); |
| 232 | |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | static void ibmpex_update_device(struct ibmpex_bmc_data *data) |
| 237 | { |
| 238 | int i, err; |
| 239 | |
| 240 | mutex_lock(&data->lock); |
| 241 | if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) && |
| 242 | data->valid) |
| 243 | goto out; |
| 244 | |
| 245 | for (i = 0; i < data->num_sensors; i++) { |
| 246 | if (!data->sensors[i].in_use) |
| 247 | continue; |
| 248 | err = ibmpex_query_sensor_data(data, i); |
| 249 | if (err) |
| 250 | continue; |
| 251 | data->sensors[i].values[0] = |
| 252 | extract_value(data->rx_msg_data, 16); |
| 253 | data->sensors[i].values[1] = |
| 254 | extract_value(data->rx_msg_data, 18); |
| 255 | data->sensors[i].values[2] = |
| 256 | extract_value(data->rx_msg_data, 20); |
| 257 | } |
| 258 | |
| 259 | data->last_updated = jiffies; |
| 260 | data->valid = 1; |
| 261 | |
| 262 | out: |
| 263 | mutex_unlock(&data->lock); |
| 264 | } |
| 265 | |
| 266 | static struct ibmpex_bmc_data *get_bmc_data(int iface) |
| 267 | { |
| 268 | struct ibmpex_bmc_data *p, *next; |
| 269 | |
| 270 | list_for_each_entry_safe(p, next, &driver_data.bmc_data, list) |
| 271 | if (p->interface == iface) |
| 272 | return p; |
| 273 | |
| 274 | return NULL; |
| 275 | } |
| 276 | |
| 277 | static ssize_t show_name(struct device *dev, struct device_attribute *devattr, |
| 278 | char *buf) |
| 279 | { |
| 280 | return sprintf(buf, "%s\n", DRVNAME); |
| 281 | } |
| 282 | static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0); |
| 283 | |
| 284 | static ssize_t ibmpex_show_sensor(struct device *dev, |
| 285 | struct device_attribute *devattr, |
| 286 | char *buf) |
| 287 | { |
| 288 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); |
| 289 | struct ibmpex_bmc_data *data = dev_get_drvdata(dev); |
| 290 | int mult = data->sensors[attr->index].multiplier; |
| 291 | ibmpex_update_device(data); |
| 292 | |
| 293 | return sprintf(buf, "%d\n", |
| 294 | data->sensors[attr->index].values[attr->nr] * mult); |
| 295 | } |
| 296 | |
| 297 | static ssize_t ibmpex_reset_high_low(struct device *dev, |
| 298 | struct device_attribute *devattr, |
| 299 | const char *buf, |
| 300 | size_t count) |
| 301 | { |
| 302 | struct ibmpex_bmc_data *data = dev_get_drvdata(dev); |
| 303 | |
| 304 | ibmpex_reset_high_low_data(data); |
| 305 | |
| 306 | return count; |
| 307 | } |
| 308 | |
| 309 | static SENSOR_DEVICE_ATTR(reset_high_low, S_IWUSR, NULL, |
| 310 | ibmpex_reset_high_low, 0); |
| 311 | |
| 312 | static int is_power_sensor(const char *sensor_id, int len) |
| 313 | { |
| 314 | if (len < PEX_SENSOR_TYPE_LEN) |
| 315 | return 0; |
| 316 | |
| 317 | if (!memcmp(sensor_id, power_sensor_sig, PEX_SENSOR_TYPE_LEN)) |
| 318 | return 1; |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static int is_temp_sensor(const char *sensor_id, int len) |
| 323 | { |
| 324 | if (len < PEX_SENSOR_TYPE_LEN) |
| 325 | return 0; |
| 326 | |
| 327 | if (!memcmp(sensor_id, temp_sensor_sig, PEX_SENSOR_TYPE_LEN)) |
| 328 | return 1; |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | static int power_sensor_multiplier(struct ibmpex_bmc_data *data, |
| 333 | const char *sensor_id, int len) |
| 334 | { |
| 335 | int i; |
| 336 | |
| 337 | if (data->sensor_major == 2) |
| 338 | return 1000000; |
| 339 | |
| 340 | for (i = PEX_SENSOR_TYPE_LEN; i < len - 1; i++) |
| 341 | if (!memcmp(&sensor_id[i], watt_sensor_sig, PEX_MULT_LEN)) |
| 342 | return 1000000; |
| 343 | |
| 344 | return 100000; |
| 345 | } |
| 346 | |
| 347 | static int create_sensor(struct ibmpex_bmc_data *data, int type, |
| 348 | int counter, int sensor, int func) |
| 349 | { |
| 350 | int err; |
| 351 | char *n; |
| 352 | |
| 353 | n = kmalloc(32, GFP_KERNEL); |
| 354 | if (!n) |
| 355 | return -ENOMEM; |
| 356 | |
| 357 | if (type == TEMP_SENSOR) |
| 358 | sprintf(n, temp_sensor_name_templates[func], "temp", counter); |
| 359 | else if (type == POWER_SENSOR) |
| 360 | sprintf(n, power_sensor_name_templates[func], "power", counter); |
| 361 | |
| 362 | sysfs_attr_init(&data->sensors[sensor].attr[func].dev_attr.attr); |
| 363 | data->sensors[sensor].attr[func].dev_attr.attr.name = n; |
| 364 | data->sensors[sensor].attr[func].dev_attr.attr.mode = S_IRUGO; |
| 365 | data->sensors[sensor].attr[func].dev_attr.show = ibmpex_show_sensor; |
| 366 | data->sensors[sensor].attr[func].index = sensor; |
| 367 | data->sensors[sensor].attr[func].nr = func; |
| 368 | |
| 369 | err = device_create_file(data->bmc_device, |
| 370 | &data->sensors[sensor].attr[func].dev_attr); |
| 371 | if (err) { |
| 372 | data->sensors[sensor].attr[func].dev_attr.attr.name = NULL; |
| 373 | kfree(n); |
| 374 | return err; |
| 375 | } |
| 376 | |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | static int ibmpex_find_sensors(struct ibmpex_bmc_data *data) |
| 381 | { |
| 382 | int i, j, err; |
| 383 | int sensor_type; |
| 384 | int sensor_counter; |
| 385 | int num_power = 0; |
| 386 | int num_temp = 0; |
| 387 | |
| 388 | err = ibmpex_query_sensor_count(data); |
| 389 | if (err <= 0) |
| 390 | return -ENOENT; |
| 391 | data->num_sensors = err; |
| 392 | |
| 393 | data->sensors = kzalloc(data->num_sensors * sizeof(*data->sensors), |
| 394 | GFP_KERNEL); |
| 395 | if (!data->sensors) |
| 396 | return -ENOMEM; |
| 397 | |
| 398 | for (i = 0; i < data->num_sensors; i++) { |
| 399 | err = ibmpex_query_sensor_name(data, i); |
| 400 | if (err) |
| 401 | continue; |
| 402 | |
| 403 | if (is_power_sensor(data->rx_msg_data, data->rx_msg_len)) { |
| 404 | sensor_type = POWER_SENSOR; |
| 405 | num_power++; |
| 406 | sensor_counter = num_power; |
| 407 | data->sensors[i].multiplier = |
| 408 | power_sensor_multiplier(data, |
| 409 | data->rx_msg_data, |
| 410 | data->rx_msg_len); |
| 411 | } else if (is_temp_sensor(data->rx_msg_data, |
| 412 | data->rx_msg_len)) { |
| 413 | sensor_type = TEMP_SENSOR; |
| 414 | num_temp++; |
| 415 | sensor_counter = num_temp; |
| 416 | data->sensors[i].multiplier = 1000; |
| 417 | } else |
| 418 | continue; |
| 419 | |
| 420 | data->sensors[i].in_use = 1; |
| 421 | |
| 422 | /* Create attributes */ |
| 423 | for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) { |
| 424 | err = create_sensor(data, sensor_type, sensor_counter, |
| 425 | i, j); |
| 426 | if (err) |
| 427 | goto exit_remove; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | err = device_create_file(data->bmc_device, |
| 432 | &sensor_dev_attr_reset_high_low.dev_attr); |
| 433 | if (err) |
| 434 | goto exit_remove; |
| 435 | |
| 436 | err = device_create_file(data->bmc_device, |
| 437 | &sensor_dev_attr_name.dev_attr); |
| 438 | if (err) |
| 439 | goto exit_remove; |
| 440 | |
| 441 | return 0; |
| 442 | |
| 443 | exit_remove: |
| 444 | device_remove_file(data->bmc_device, |
| 445 | &sensor_dev_attr_reset_high_low.dev_attr); |
| 446 | device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr); |
| 447 | for (i = 0; i < data->num_sensors; i++) |
| 448 | for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) { |
| 449 | if (!data->sensors[i].attr[j].dev_attr.attr.name) |
| 450 | continue; |
| 451 | device_remove_file(data->bmc_device, |
| 452 | &data->sensors[i].attr[j].dev_attr); |
| 453 | kfree(data->sensors[i].attr[j].dev_attr.attr.name); |
| 454 | } |
| 455 | |
| 456 | kfree(data->sensors); |
| 457 | return err; |
| 458 | } |
| 459 | |
| 460 | static void ibmpex_register_bmc(int iface, struct device *dev) |
| 461 | { |
| 462 | struct ibmpex_bmc_data *data; |
| 463 | int err; |
| 464 | |
| 465 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 466 | if (!data) |
| 467 | return; |
| 468 | |
| 469 | data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; |
| 470 | data->address.channel = IPMI_BMC_CHANNEL; |
| 471 | data->address.data[0] = 0; |
| 472 | data->interface = iface; |
| 473 | data->bmc_device = dev; |
| 474 | |
| 475 | /* Create IPMI messaging interface user */ |
| 476 | err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs, |
| 477 | data, &data->user); |
| 478 | if (err < 0) { |
| 479 | dev_err(dev, |
| 480 | "Unable to register user with IPMI interface %d\n", |
| 481 | data->interface); |
| 482 | goto out; |
| 483 | } |
| 484 | |
| 485 | mutex_init(&data->lock); |
| 486 | |
| 487 | /* Initialize message */ |
| 488 | data->tx_msgid = 0; |
| 489 | init_completion(&data->read_complete); |
| 490 | data->tx_message.netfn = PEX_NET_FUNCTION; |
| 491 | data->tx_message.cmd = PEX_COMMAND; |
| 492 | data->tx_message.data = data->tx_msg_data; |
| 493 | |
| 494 | /* Does this BMC support PowerExecutive? */ |
| 495 | err = ibmpex_ver_check(data); |
| 496 | if (err) |
| 497 | goto out_user; |
| 498 | |
| 499 | /* Register the BMC as a HWMON class device */ |
| 500 | data->hwmon_dev = hwmon_device_register(data->bmc_device); |
| 501 | |
| 502 | if (IS_ERR(data->hwmon_dev)) { |
| 503 | dev_err(data->bmc_device, |
| 504 | "Unable to register hwmon device for IPMI interface %d\n", |
| 505 | data->interface); |
| 506 | goto out_user; |
| 507 | } |
| 508 | |
| 509 | /* finally add the new bmc data to the bmc data list */ |
| 510 | dev_set_drvdata(dev, data); |
| 511 | list_add_tail(&data->list, &driver_data.bmc_data); |
| 512 | |
| 513 | /* Now go find all the sensors */ |
| 514 | err = ibmpex_find_sensors(data); |
| 515 | if (err) { |
| 516 | dev_err(data->bmc_device, "Error %d finding sensors\n", err); |
| 517 | goto out_register; |
| 518 | } |
| 519 | |
| 520 | return; |
| 521 | |
| 522 | out_register: |
| 523 | hwmon_device_unregister(data->hwmon_dev); |
| 524 | out_user: |
| 525 | ipmi_destroy_user(data->user); |
| 526 | out: |
| 527 | kfree(data); |
| 528 | } |
| 529 | |
| 530 | static void ibmpex_bmc_delete(struct ibmpex_bmc_data *data) |
| 531 | { |
| 532 | int i, j; |
| 533 | |
| 534 | device_remove_file(data->bmc_device, |
| 535 | &sensor_dev_attr_reset_high_low.dev_attr); |
| 536 | device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr); |
| 537 | for (i = 0; i < data->num_sensors; i++) |
| 538 | for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) { |
| 539 | if (!data->sensors[i].attr[j].dev_attr.attr.name) |
| 540 | continue; |
| 541 | device_remove_file(data->bmc_device, |
| 542 | &data->sensors[i].attr[j].dev_attr); |
| 543 | kfree(data->sensors[i].attr[j].dev_attr.attr.name); |
| 544 | } |
| 545 | |
| 546 | list_del(&data->list); |
| 547 | dev_set_drvdata(data->bmc_device, NULL); |
| 548 | hwmon_device_unregister(data->hwmon_dev); |
| 549 | ipmi_destroy_user(data->user); |
| 550 | kfree(data->sensors); |
| 551 | kfree(data); |
| 552 | } |
| 553 | |
| 554 | static void ibmpex_bmc_gone(int iface) |
| 555 | { |
| 556 | struct ibmpex_bmc_data *data = get_bmc_data(iface); |
| 557 | |
| 558 | if (!data) |
| 559 | return; |
| 560 | |
| 561 | ibmpex_bmc_delete(data); |
| 562 | } |
| 563 | |
| 564 | static void ibmpex_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data) |
| 565 | { |
| 566 | struct ibmpex_bmc_data *data = (struct ibmpex_bmc_data *)user_msg_data; |
| 567 | |
| 568 | if (msg->msgid != data->tx_msgid) { |
| 569 | dev_err(data->bmc_device, |
| 570 | "Mismatch between received msgid (%02x) and transmitted msgid (%02x)!\n", |
| 571 | (int)msg->msgid, |
| 572 | (int)data->tx_msgid); |
| 573 | ipmi_free_recv_msg(msg); |
| 574 | return; |
| 575 | } |
| 576 | |
| 577 | data->rx_recv_type = msg->recv_type; |
| 578 | if (msg->msg.data_len > 0) |
| 579 | data->rx_result = msg->msg.data[0]; |
| 580 | else |
| 581 | data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE; |
| 582 | |
| 583 | if (msg->msg.data_len > 1) { |
| 584 | data->rx_msg_len = msg->msg.data_len - 1; |
| 585 | memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len); |
| 586 | } else |
| 587 | data->rx_msg_len = 0; |
| 588 | |
| 589 | ipmi_free_recv_msg(msg); |
| 590 | complete(&data->read_complete); |
| 591 | } |
| 592 | |
| 593 | static int __init ibmpex_init(void) |
| 594 | { |
| 595 | return ipmi_smi_watcher_register(&driver_data.bmc_events); |
| 596 | } |
| 597 | |
| 598 | static void __exit ibmpex_exit(void) |
| 599 | { |
| 600 | struct ibmpex_bmc_data *p, *next; |
| 601 | |
| 602 | ipmi_smi_watcher_unregister(&driver_data.bmc_events); |
| 603 | list_for_each_entry_safe(p, next, &driver_data.bmc_data, list) |
| 604 | ibmpex_bmc_delete(p); |
| 605 | } |
| 606 | |
| 607 | MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>"); |
| 608 | MODULE_DESCRIPTION("IBM PowerExecutive power/temperature sensor driver"); |
| 609 | MODULE_LICENSE("GPL"); |
| 610 | |
| 611 | module_init(ibmpex_init); |
| 612 | module_exit(ibmpex_exit); |
| 613 | |
| 614 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3350-*"); |
| 615 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3550-*"); |
| 616 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3650-*"); |
| 617 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3655-*"); |
| 618 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3755-*"); |