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57c7c3a0 DW |
1 | /* |
2 | * A hwmon driver for the IBM PowerExecutive temperature/power sensors | |
3 | * Copyright (C) 2007 IBM | |
4 | * | |
5 | * Author: Darrick J. Wong <djwong@us.ibm.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 | ||
29 | #define REFRESH_INTERVAL (2 * HZ) | |
30 | #define DRVNAME "ibmpex" | |
31 | ||
32 | #define PEX_GET_VERSION 1 | |
33 | #define PEX_GET_SENSOR_COUNT 2 | |
34 | #define PEX_GET_SENSOR_NAME 3 | |
35 | #define PEX_RESET_HIGH_LOW 4 | |
36 | #define PEX_GET_SENSOR_DATA 6 | |
37 | ||
38 | #define PEX_NET_FUNCTION 0x3A | |
39 | #define PEX_COMMAND 0x3C | |
40 | ||
41 | static inline u16 extract_value(const char *data, int offset) | |
42 | { | |
43 | return be16_to_cpup((u16 *)&data[offset]); | |
44 | } | |
45 | ||
46 | #define TEMP_SENSOR 1 | |
47 | #define POWER_SENSOR 2 | |
48 | ||
49 | #define PEX_SENSOR_TYPE_LEN 3 | |
50 | static u8 const power_sensor_sig[] = {0x70, 0x77, 0x72}; | |
51 | static u8 const temp_sensor_sig[] = {0x74, 0x65, 0x6D}; | |
52 | ||
53 | #define PEX_MULT_LEN 2 | |
54 | static u8 const watt_sensor_sig[] = {0x41, 0x43}; | |
55 | ||
56 | #define PEX_NUM_SENSOR_FUNCS 3 | |
57 | static char const * const power_sensor_name_templates[] = { | |
58 | "%s%d_average", | |
59 | "%s%d_average_lowest", | |
60 | "%s%d_average_highest" | |
61 | }; | |
62 | static char const * const temp_sensor_name_templates[] = { | |
63 | "%s%d_input", | |
64 | "%s%d_input_lowest", | |
65 | "%s%d_input_highest" | |
66 | }; | |
67 | ||
68 | static void ibmpex_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data); | |
69 | static void ibmpex_register_bmc(int iface, struct device *dev); | |
70 | static void ibmpex_bmc_gone(int iface); | |
71 | ||
72 | struct ibmpex_sensor_data { | |
73 | int in_use; | |
74 | s16 values[PEX_NUM_SENSOR_FUNCS]; | |
75 | int multiplier; | |
76 | ||
77 | struct sensor_device_attribute_2 attr[PEX_NUM_SENSOR_FUNCS]; | |
78 | }; | |
79 | ||
80 | struct ibmpex_bmc_data { | |
81 | struct list_head list; | |
82 | struct device *hwmon_dev; | |
83 | struct device *bmc_device; | |
84 | struct mutex lock; | |
85 | char valid; | |
86 | unsigned long last_updated; /* In jiffies */ | |
87 | ||
88 | struct ipmi_addr address; | |
89 | struct completion read_complete; | |
90 | ipmi_user_t user; | |
91 | int interface; | |
92 | ||
93 | struct kernel_ipmi_msg tx_message; | |
94 | unsigned char tx_msg_data[IPMI_MAX_MSG_LENGTH]; | |
95 | long tx_msgid; | |
96 | ||
97 | unsigned char rx_msg_data[IPMI_MAX_MSG_LENGTH]; | |
98 | unsigned long rx_msg_len; | |
99 | unsigned char rx_result; | |
100 | int rx_recv_type; | |
101 | ||
102 | unsigned char sensor_major; | |
103 | unsigned char sensor_minor; | |
104 | ||
105 | unsigned char num_sensors; | |
106 | struct ibmpex_sensor_data *sensors; | |
107 | }; | |
108 | ||
109 | struct ibmpex_driver_data { | |
110 | struct list_head bmc_data; | |
111 | struct ipmi_smi_watcher bmc_events; | |
112 | struct ipmi_user_hndl ipmi_hndlrs; | |
113 | }; | |
114 | ||
115 | static struct ibmpex_driver_data driver_data = { | |
116 | .bmc_data = LIST_HEAD_INIT(driver_data.bmc_data), | |
117 | .bmc_events = { | |
118 | .owner = THIS_MODULE, | |
119 | .new_smi = ibmpex_register_bmc, | |
120 | .smi_gone = ibmpex_bmc_gone, | |
121 | }, | |
122 | .ipmi_hndlrs = { | |
123 | .ipmi_recv_hndl = ibmpex_msg_handler, | |
124 | }, | |
125 | }; | |
126 | ||
127 | static int ibmpex_send_message(struct ibmpex_bmc_data *data) | |
128 | { | |
129 | int err; | |
130 | ||
131 | err = ipmi_validate_addr(&data->address, sizeof(data->address)); | |
132 | if (err) | |
133 | goto out; | |
134 | ||
135 | data->tx_msgid++; | |
136 | err = ipmi_request_settime(data->user, &data->address, data->tx_msgid, | |
137 | &data->tx_message, data, 0, 0, 0); | |
138 | if (err) | |
139 | goto out1; | |
140 | ||
141 | return 0; | |
142 | out1: | |
143 | printk(KERN_ERR "%s: request_settime=%x\n", __FUNCTION__, err); | |
144 | return err; | |
145 | out: | |
146 | printk(KERN_ERR "%s: validate_addr=%x\n", __FUNCTION__, err); | |
147 | return err; | |
148 | } | |
149 | ||
150 | static int ibmpex_ver_check(struct ibmpex_bmc_data *data) | |
151 | { | |
152 | data->tx_msg_data[0] = PEX_GET_VERSION; | |
153 | data->tx_message.data_len = 1; | |
154 | ibmpex_send_message(data); | |
155 | ||
156 | wait_for_completion(&data->read_complete); | |
157 | ||
158 | if (data->rx_result || data->rx_msg_len != 6) | |
159 | return -ENOENT; | |
160 | ||
161 | data->sensor_major = data->rx_msg_data[0]; | |
162 | data->sensor_minor = data->rx_msg_data[1]; | |
163 | ||
164 | printk(KERN_INFO DRVNAME ": Found BMC with sensor interface " | |
165 | "v%d.%d %d-%02d-%02d on interface %d\n", | |
166 | data->sensor_major, | |
167 | data->sensor_minor, | |
168 | extract_value(data->rx_msg_data, 2), | |
169 | data->rx_msg_data[4], | |
170 | data->rx_msg_data[5], | |
171 | data->interface); | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | static int ibmpex_query_sensor_count(struct ibmpex_bmc_data *data) | |
177 | { | |
178 | data->tx_msg_data[0] = PEX_GET_SENSOR_COUNT; | |
179 | data->tx_message.data_len = 1; | |
180 | ibmpex_send_message(data); | |
181 | ||
182 | wait_for_completion(&data->read_complete); | |
183 | ||
184 | if (data->rx_result || data->rx_msg_len != 1) | |
185 | return -ENOENT; | |
186 | ||
187 | return data->rx_msg_data[0]; | |
188 | } | |
189 | ||
190 | static int ibmpex_query_sensor_name(struct ibmpex_bmc_data *data, int sensor) | |
191 | { | |
192 | data->tx_msg_data[0] = PEX_GET_SENSOR_NAME; | |
193 | data->tx_msg_data[1] = sensor; | |
194 | data->tx_message.data_len = 2; | |
195 | ibmpex_send_message(data); | |
196 | ||
197 | wait_for_completion(&data->read_complete); | |
198 | ||
199 | if (data->rx_result || data->rx_msg_len < 1) | |
200 | return -ENOENT; | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
205 | static int ibmpex_query_sensor_data(struct ibmpex_bmc_data *data, int sensor) | |
206 | { | |
207 | data->tx_msg_data[0] = PEX_GET_SENSOR_DATA; | |
208 | data->tx_msg_data[1] = sensor; | |
209 | data->tx_message.data_len = 2; | |
210 | ibmpex_send_message(data); | |
211 | ||
212 | wait_for_completion(&data->read_complete); | |
213 | ||
214 | if (data->rx_result || data->rx_msg_len < 26) { | |
215 | printk(KERN_ERR "Error reading sensor %d, please check.\n", | |
216 | sensor); | |
217 | return -ENOENT; | |
218 | } | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static int ibmpex_reset_high_low_data(struct ibmpex_bmc_data *data) | |
224 | { | |
225 | data->tx_msg_data[0] = PEX_RESET_HIGH_LOW; | |
226 | data->tx_message.data_len = 1; | |
227 | ibmpex_send_message(data); | |
228 | ||
229 | wait_for_completion(&data->read_complete); | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static void ibmpex_update_device(struct ibmpex_bmc_data *data) | |
235 | { | |
236 | int i, err; | |
237 | ||
238 | mutex_lock(&data->lock); | |
239 | if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) && | |
240 | data->valid) | |
241 | goto out; | |
242 | ||
243 | for (i = 0; i < data->num_sensors; i++) { | |
244 | if (!data->sensors[i].in_use) | |
245 | continue; | |
246 | err = ibmpex_query_sensor_data(data, i); | |
247 | if (err) | |
248 | continue; | |
249 | data->sensors[i].values[0] = | |
250 | extract_value(data->rx_msg_data, 16); | |
251 | data->sensors[i].values[1] = | |
252 | extract_value(data->rx_msg_data, 18); | |
253 | data->sensors[i].values[2] = | |
254 | extract_value(data->rx_msg_data, 20); | |
255 | } | |
256 | ||
257 | data->last_updated = jiffies; | |
258 | data->valid = 1; | |
259 | ||
260 | out: | |
261 | mutex_unlock(&data->lock); | |
262 | } | |
263 | ||
264 | static struct ibmpex_bmc_data *get_bmc_data(int iface) | |
265 | { | |
266 | struct ibmpex_bmc_data *p, *next; | |
267 | ||
268 | list_for_each_entry_safe(p, next, &driver_data.bmc_data, list) | |
269 | if (p->interface == iface) | |
270 | return p; | |
271 | ||
272 | return NULL; | |
273 | } | |
274 | ||
275 | static ssize_t show_name(struct device *dev, struct device_attribute *devattr, | |
276 | char *buf) | |
277 | { | |
278 | return sprintf(buf, "%s\n", DRVNAME); | |
279 | } | |
280 | static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0); | |
281 | ||
282 | static ssize_t ibmpex_show_sensor(struct device *dev, | |
283 | struct device_attribute *devattr, | |
284 | char *buf) | |
285 | { | |
286 | struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr); | |
287 | struct ibmpex_bmc_data *data = dev_get_drvdata(dev); | |
288 | int mult = data->sensors[attr->index].multiplier; | |
289 | ibmpex_update_device(data); | |
290 | ||
291 | return sprintf(buf, "%d\n", | |
292 | data->sensors[attr->index].values[attr->nr] * mult); | |
293 | } | |
294 | ||
295 | static ssize_t ibmpex_reset_high_low(struct device *dev, | |
296 | struct device_attribute *devattr, | |
297 | const char *buf, | |
298 | size_t count) | |
299 | { | |
300 | struct ibmpex_bmc_data *data = dev_get_drvdata(dev); | |
301 | ||
302 | ibmpex_reset_high_low_data(data); | |
303 | ||
304 | return count; | |
305 | } | |
306 | ||
307 | static SENSOR_DEVICE_ATTR(reset_high_low, S_IWUSR, NULL, | |
308 | ibmpex_reset_high_low, 0); | |
309 | ||
310 | static int is_power_sensor(const char *sensor_id, int len) | |
311 | { | |
312 | if (len < PEX_SENSOR_TYPE_LEN) | |
313 | return 0; | |
314 | ||
315 | if (!memcmp(sensor_id, power_sensor_sig, PEX_SENSOR_TYPE_LEN)) | |
316 | return 1; | |
317 | return 0; | |
318 | } | |
319 | ||
320 | static int is_temp_sensor(const char *sensor_id, int len) | |
321 | { | |
322 | if (len < PEX_SENSOR_TYPE_LEN) | |
323 | return 0; | |
324 | ||
325 | if (!memcmp(sensor_id, temp_sensor_sig, PEX_SENSOR_TYPE_LEN)) | |
326 | return 1; | |
327 | return 0; | |
328 | } | |
329 | ||
330 | static int power_sensor_multiplier(const char *sensor_id, int len) | |
331 | { | |
332 | int i; | |
333 | ||
334 | for (i = PEX_SENSOR_TYPE_LEN; i < len - 1; i++) | |
335 | if (!memcmp(&sensor_id[i], watt_sensor_sig, PEX_MULT_LEN)) | |
336 | return 1000000; | |
337 | ||
338 | return 100000; | |
339 | } | |
340 | ||
341 | static int create_sensor(struct ibmpex_bmc_data *data, int type, | |
342 | int counter, int sensor, int func) | |
343 | { | |
344 | int err; | |
345 | char *n; | |
346 | ||
347 | n = kmalloc(32, GFP_KERNEL); | |
348 | if (!n) | |
349 | return -ENOMEM; | |
350 | ||
351 | if (type == TEMP_SENSOR) | |
352 | sprintf(n, temp_sensor_name_templates[func], "temp", counter); | |
353 | else if (type == POWER_SENSOR) | |
354 | sprintf(n, power_sensor_name_templates[func], "power", counter); | |
355 | ||
356 | data->sensors[sensor].attr[func].dev_attr.attr.name = n; | |
357 | data->sensors[sensor].attr[func].dev_attr.attr.mode = S_IRUGO; | |
358 | data->sensors[sensor].attr[func].dev_attr.show = ibmpex_show_sensor; | |
359 | data->sensors[sensor].attr[func].index = sensor; | |
360 | data->sensors[sensor].attr[func].nr = func; | |
361 | ||
362 | err = device_create_file(data->bmc_device, | |
363 | &data->sensors[sensor].attr[func].dev_attr); | |
364 | if (err) { | |
365 | data->sensors[sensor].attr[func].dev_attr.attr.name = NULL; | |
366 | kfree(n); | |
367 | return err; | |
368 | } | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | static int ibmpex_find_sensors(struct ibmpex_bmc_data *data) | |
374 | { | |
375 | int i, j, err; | |
376 | int sensor_type; | |
377 | int sensor_counter; | |
378 | int num_power = 0; | |
379 | int num_temp = 0; | |
380 | ||
381 | err = ibmpex_query_sensor_count(data); | |
382 | if (err <= 0) | |
383 | return -ENOENT; | |
384 | data->num_sensors = err; | |
385 | ||
386 | data->sensors = kzalloc(data->num_sensors * sizeof(*data->sensors), | |
387 | GFP_KERNEL); | |
388 | if (!data->sensors) | |
389 | return -ENOMEM; | |
390 | ||
391 | for (i = 0; i < data->num_sensors; i++) { | |
392 | err = ibmpex_query_sensor_name(data, i); | |
393 | if (err) | |
394 | continue; | |
395 | ||
396 | if (is_power_sensor(data->rx_msg_data, data->rx_msg_len)) { | |
397 | sensor_type = POWER_SENSOR; | |
398 | num_power++; | |
399 | sensor_counter = num_power; | |
400 | data->sensors[i].multiplier = | |
401 | power_sensor_multiplier(data->rx_msg_data, | |
402 | data->rx_msg_len); | |
403 | } else if (is_temp_sensor(data->rx_msg_data, | |
404 | data->rx_msg_len)) { | |
405 | sensor_type = TEMP_SENSOR; | |
406 | num_temp++; | |
407 | sensor_counter = num_temp; | |
408 | data->sensors[i].multiplier = 1; | |
409 | } else | |
410 | continue; | |
411 | ||
412 | data->sensors[i].in_use = 1; | |
413 | ||
414 | /* Create attributes */ | |
415 | for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) { | |
416 | err = create_sensor(data, sensor_type, sensor_counter, | |
417 | i, j); | |
418 | if (err) | |
419 | goto exit_remove; | |
420 | } | |
421 | } | |
422 | ||
423 | err = device_create_file(data->bmc_device, | |
424 | &sensor_dev_attr_reset_high_low.dev_attr); | |
425 | if (err) | |
426 | goto exit_remove; | |
427 | ||
428 | err = device_create_file(data->bmc_device, | |
429 | &sensor_dev_attr_name.dev_attr); | |
430 | if (err) | |
431 | goto exit_remove; | |
432 | ||
433 | return 0; | |
434 | ||
435 | exit_remove: | |
436 | device_remove_file(data->bmc_device, | |
437 | &sensor_dev_attr_reset_high_low.dev_attr); | |
438 | device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr); | |
439 | for (i = 0; i < data->num_sensors; i++) | |
440 | for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) { | |
441 | if (!data->sensors[i].attr[j].dev_attr.attr.name) | |
442 | continue; | |
443 | device_remove_file(data->bmc_device, | |
444 | &data->sensors[i].attr[j].dev_attr); | |
445 | kfree(data->sensors[i].attr[j].dev_attr.attr.name); | |
446 | } | |
447 | ||
448 | kfree(data->sensors); | |
449 | return err; | |
450 | } | |
451 | ||
452 | static void ibmpex_register_bmc(int iface, struct device *dev) | |
453 | { | |
454 | struct ibmpex_bmc_data *data; | |
455 | int err; | |
456 | ||
457 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
458 | if (!data) { | |
459 | printk(KERN_ERR DRVNAME ": Insufficient memory for BMC " | |
9be48444 | 460 | "interface.\n"); |
57c7c3a0 DW |
461 | return; |
462 | } | |
463 | ||
464 | data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
465 | data->address.channel = IPMI_BMC_CHANNEL; | |
466 | data->address.data[0] = 0; | |
467 | data->interface = iface; | |
468 | data->bmc_device = dev; | |
469 | ||
470 | /* Create IPMI messaging interface user */ | |
471 | err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs, | |
472 | data, &data->user); | |
473 | if (err < 0) { | |
474 | printk(KERN_ERR DRVNAME ": Error, unable to register user with " | |
475 | "ipmi interface %d\n", | |
476 | data->interface); | |
477 | goto out; | |
478 | } | |
479 | ||
480 | mutex_init(&data->lock); | |
481 | ||
482 | /* Initialize message */ | |
483 | data->tx_msgid = 0; | |
484 | init_completion(&data->read_complete); | |
485 | data->tx_message.netfn = PEX_NET_FUNCTION; | |
486 | data->tx_message.cmd = PEX_COMMAND; | |
487 | data->tx_message.data = data->tx_msg_data; | |
488 | ||
489 | /* Does this BMC support PowerExecutive? */ | |
490 | err = ibmpex_ver_check(data); | |
491 | if (err) | |
492 | goto out_user; | |
493 | ||
494 | /* Register the BMC as a HWMON class device */ | |
495 | data->hwmon_dev = hwmon_device_register(data->bmc_device); | |
496 | ||
497 | if (IS_ERR(data->hwmon_dev)) { | |
498 | printk(KERN_ERR DRVNAME ": Error, unable to register hwmon " | |
499 | "class device for interface %d\n", | |
500 | data->interface); | |
4cfdbe7f | 501 | goto out_user; |
57c7c3a0 DW |
502 | } |
503 | ||
504 | /* finally add the new bmc data to the bmc data list */ | |
505 | dev_set_drvdata(dev, data); | |
506 | list_add_tail(&data->list, &driver_data.bmc_data); | |
507 | ||
508 | /* Now go find all the sensors */ | |
509 | err = ibmpex_find_sensors(data); | |
510 | if (err) { | |
511 | printk(KERN_ERR "Error %d allocating memory\n", err); | |
512 | goto out_register; | |
513 | } | |
514 | ||
515 | return; | |
516 | ||
517 | out_register: | |
518 | hwmon_device_unregister(data->hwmon_dev); | |
519 | out_user: | |
520 | ipmi_destroy_user(data->user); | |
521 | out: | |
522 | kfree(data); | |
523 | } | |
524 | ||
525 | static void ibmpex_bmc_delete(struct ibmpex_bmc_data *data) | |
526 | { | |
527 | int i, j; | |
528 | ||
529 | device_remove_file(data->bmc_device, | |
530 | &sensor_dev_attr_reset_high_low.dev_attr); | |
531 | device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr); | |
532 | for (i = 0; i < data->num_sensors; i++) | |
533 | for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) { | |
534 | if (!data->sensors[i].attr[j].dev_attr.attr.name) | |
535 | continue; | |
536 | device_remove_file(data->bmc_device, | |
537 | &data->sensors[i].attr[j].dev_attr); | |
538 | kfree(data->sensors[i].attr[j].dev_attr.attr.name); | |
539 | } | |
540 | ||
541 | list_del(&data->list); | |
542 | dev_set_drvdata(data->bmc_device, NULL); | |
543 | hwmon_device_unregister(data->hwmon_dev); | |
544 | ipmi_destroy_user(data->user); | |
545 | kfree(data->sensors); | |
546 | kfree(data); | |
547 | } | |
548 | ||
549 | static void ibmpex_bmc_gone(int iface) | |
550 | { | |
551 | struct ibmpex_bmc_data *data = get_bmc_data(iface); | |
552 | ||
553 | if (!data) | |
554 | return; | |
555 | ||
556 | ibmpex_bmc_delete(data); | |
557 | } | |
558 | ||
559 | static void ibmpex_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data) | |
560 | { | |
561 | struct ibmpex_bmc_data *data = (struct ibmpex_bmc_data *)user_msg_data; | |
562 | ||
563 | if (msg->msgid != data->tx_msgid) { | |
564 | printk(KERN_ERR "Received msgid (%02x) and transmitted " | |
565 | "msgid (%02x) mismatch!\n", | |
566 | (int)msg->msgid, | |
567 | (int)data->tx_msgid); | |
568 | ipmi_free_recv_msg(msg); | |
569 | return; | |
570 | } | |
571 | ||
572 | data->rx_recv_type = msg->recv_type; | |
573 | if (msg->msg.data_len > 0) | |
574 | data->rx_result = msg->msg.data[0]; | |
575 | else | |
576 | data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE; | |
577 | ||
578 | if (msg->msg.data_len > 1) { | |
579 | data->rx_msg_len = msg->msg.data_len - 1; | |
580 | memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len); | |
581 | } else | |
582 | data->rx_msg_len = 0; | |
583 | ||
584 | ipmi_free_recv_msg(msg); | |
585 | complete(&data->read_complete); | |
586 | } | |
587 | ||
588 | static int __init ibmpex_init(void) | |
589 | { | |
590 | return ipmi_smi_watcher_register(&driver_data.bmc_events); | |
591 | } | |
592 | ||
593 | static void __exit ibmpex_exit(void) | |
594 | { | |
595 | struct ibmpex_bmc_data *p, *next; | |
596 | ||
597 | ipmi_smi_watcher_unregister(&driver_data.bmc_events); | |
598 | list_for_each_entry_safe(p, next, &driver_data.bmc_data, list) | |
599 | ibmpex_bmc_delete(p); | |
600 | } | |
601 | ||
602 | MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>"); | |
603 | MODULE_DESCRIPTION("IBM PowerExecutive power/temperature sensor driver"); | |
604 | MODULE_LICENSE("GPL"); | |
605 | ||
606 | module_init(ibmpex_init); | |
607 | module_exit(ibmpex_exit); |