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8808a793 | 1 | /* |
eb93b7df DW |
2 | * A hwmon driver for the IBM System Director Active Energy Manager (AEM) |
3 | * temperature/power/energy sensors and capping functionality. | |
8808a793 DW |
4 | * Copyright (C) 2008 IBM |
5 | * | |
6 | * Author: Darrick J. Wong <djwong@us.ibm.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/ipmi.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/hwmon.h> | |
26 | #include <linux/hwmon-sysfs.h> | |
27 | #include <linux/jiffies.h> | |
28 | #include <linux/mutex.h> | |
29 | #include <linux/kdev_t.h> | |
30 | #include <linux/spinlock.h> | |
31 | #include <linux/idr.h> | |
5a0e3ad6 | 32 | #include <linux/slab.h> |
8808a793 DW |
33 | #include <linux/sched.h> |
34 | #include <linux/platform_device.h> | |
35 | #include <linux/math64.h> | |
36 | #include <linux/time.h> | |
37 | ||
38 | #define REFRESH_INTERVAL (HZ) | |
39 | #define IPMI_TIMEOUT (30 * HZ) | |
40 | #define DRVNAME "aem" | |
41 | ||
42 | #define AEM_NETFN 0x2E | |
43 | ||
44 | #define AEM_FIND_FW_CMD 0x80 | |
45 | #define AEM_ELEMENT_CMD 0x81 | |
46 | #define AEM_FW_INSTANCE_CMD 0x82 | |
47 | ||
48 | #define AEM_READ_ELEMENT_CFG 0x80 | |
49 | #define AEM_READ_BUFFER 0x81 | |
50 | #define AEM_READ_REGISTER 0x82 | |
51 | #define AEM_WRITE_REGISTER 0x83 | |
52 | #define AEM_SET_REG_MASK 0x84 | |
53 | #define AEM_CLEAR_REG_MASK 0x85 | |
54 | #define AEM_READ_ELEMENT_CFG2 0x86 | |
55 | ||
56 | #define AEM_CONTROL_ELEMENT 0 | |
57 | #define AEM_ENERGY_ELEMENT 1 | |
58 | #define AEM_CLOCK_ELEMENT 4 | |
59 | #define AEM_POWER_CAP_ELEMENT 7 | |
60 | #define AEM_EXHAUST_ELEMENT 9 | |
61 | #define AEM_POWER_ELEMENT 10 | |
62 | ||
63 | #define AEM_MODULE_TYPE_ID 0x0001 | |
64 | ||
65 | #define AEM2_NUM_ENERGY_REGS 2 | |
66 | #define AEM2_NUM_PCAP_REGS 6 | |
67 | #define AEM2_NUM_TEMP_REGS 2 | |
68 | #define AEM2_NUM_SENSORS 14 | |
69 | ||
70 | #define AEM1_NUM_ENERGY_REGS 1 | |
71 | #define AEM1_NUM_SENSORS 3 | |
72 | ||
73 | /* AEM 2.x has more energy registers */ | |
74 | #define AEM_NUM_ENERGY_REGS AEM2_NUM_ENERGY_REGS | |
75 | /* AEM 2.x needs more sensor files */ | |
76 | #define AEM_NUM_SENSORS AEM2_NUM_SENSORS | |
77 | ||
78 | #define POWER_CAP 0 | |
79 | #define POWER_CAP_MAX_HOTPLUG 1 | |
80 | #define POWER_CAP_MAX 2 | |
81 | #define POWER_CAP_MIN_WARNING 3 | |
82 | #define POWER_CAP_MIN 4 | |
83 | #define POWER_AUX 5 | |
84 | ||
85 | #define AEM_DEFAULT_POWER_INTERVAL 1000 | |
86 | #define AEM_MIN_POWER_INTERVAL 200 | |
87 | #define UJ_PER_MJ 1000L | |
88 | ||
89 | static DEFINE_IDR(aem_idr); | |
90 | static DEFINE_SPINLOCK(aem_idr_lock); | |
91 | ||
fe2d5ffc DW |
92 | static struct platform_driver aem_driver = { |
93 | .driver = { | |
94 | .name = DRVNAME, | |
95 | .bus = &platform_bus_type, | |
96 | } | |
8808a793 DW |
97 | }; |
98 | ||
99 | struct aem_ipmi_data { | |
100 | struct completion read_complete; | |
101 | struct ipmi_addr address; | |
102 | ipmi_user_t user; | |
103 | int interface; | |
104 | ||
105 | struct kernel_ipmi_msg tx_message; | |
106 | long tx_msgid; | |
107 | ||
108 | void *rx_msg_data; | |
109 | unsigned short rx_msg_len; | |
110 | unsigned char rx_result; | |
111 | int rx_recv_type; | |
112 | ||
113 | struct device *bmc_device; | |
114 | }; | |
115 | ||
116 | struct aem_ro_sensor_template { | |
117 | char *label; | |
118 | ssize_t (*show)(struct device *dev, | |
119 | struct device_attribute *devattr, | |
120 | char *buf); | |
121 | int index; | |
122 | }; | |
123 | ||
124 | struct aem_rw_sensor_template { | |
125 | char *label; | |
126 | ssize_t (*show)(struct device *dev, | |
127 | struct device_attribute *devattr, | |
128 | char *buf); | |
129 | ssize_t (*set)(struct device *dev, | |
130 | struct device_attribute *devattr, | |
131 | const char *buf, size_t count); | |
132 | int index; | |
133 | }; | |
134 | ||
135 | struct aem_data { | |
136 | struct list_head list; | |
137 | ||
138 | struct device *hwmon_dev; | |
139 | struct platform_device *pdev; | |
140 | struct mutex lock; | |
141 | char valid; | |
142 | unsigned long last_updated; /* In jiffies */ | |
143 | u8 ver_major; | |
144 | u8 ver_minor; | |
145 | u8 module_handle; | |
146 | int id; | |
147 | struct aem_ipmi_data ipmi; | |
148 | ||
149 | /* Function to update sensors */ | |
150 | void (*update)(struct aem_data *data); | |
151 | ||
152 | /* | |
153 | * AEM 1.x sensors: | |
154 | * Available sensors: | |
155 | * Energy meter | |
156 | * Power meter | |
157 | * | |
158 | * AEM 2.x sensors: | |
159 | * Two energy meters | |
160 | * Two power meters | |
161 | * Two temperature sensors | |
162 | * Six power cap registers | |
163 | */ | |
164 | ||
165 | /* sysfs attrs */ | |
166 | struct sensor_device_attribute sensors[AEM_NUM_SENSORS]; | |
167 | ||
168 | /* energy use in mJ */ | |
169 | u64 energy[AEM_NUM_ENERGY_REGS]; | |
170 | ||
171 | /* power sampling interval in ms */ | |
172 | unsigned long power_period[AEM_NUM_ENERGY_REGS]; | |
173 | ||
174 | /* Everything past here is for AEM2 only */ | |
175 | ||
176 | /* power caps in dW */ | |
177 | u16 pcap[AEM2_NUM_PCAP_REGS]; | |
178 | ||
179 | /* exhaust temperature in C */ | |
180 | u8 temp[AEM2_NUM_TEMP_REGS]; | |
181 | }; | |
182 | ||
183 | /* Data structures returned by the AEM firmware */ | |
184 | struct aem_iana_id { | |
185 | u8 bytes[3]; | |
186 | }; | |
187 | static struct aem_iana_id system_x_id = { | |
188 | .bytes = {0x4D, 0x4F, 0x00} | |
189 | }; | |
190 | ||
191 | /* These are used to find AEM1 instances */ | |
192 | struct aem_find_firmware_req { | |
193 | struct aem_iana_id id; | |
194 | u8 rsvd; | |
a064d5bd AV |
195 | __be16 index; |
196 | __be16 module_type_id; | |
8808a793 DW |
197 | } __packed; |
198 | ||
199 | struct aem_find_firmware_resp { | |
200 | struct aem_iana_id id; | |
201 | u8 num_instances; | |
202 | } __packed; | |
203 | ||
204 | /* These are used to find AEM2 instances */ | |
205 | struct aem_find_instance_req { | |
206 | struct aem_iana_id id; | |
207 | u8 instance_number; | |
a064d5bd | 208 | __be16 module_type_id; |
8808a793 DW |
209 | } __packed; |
210 | ||
211 | struct aem_find_instance_resp { | |
212 | struct aem_iana_id id; | |
213 | u8 num_instances; | |
214 | u8 major; | |
215 | u8 minor; | |
216 | u8 module_handle; | |
217 | u16 record_id; | |
218 | } __packed; | |
219 | ||
220 | /* These are used to query sensors */ | |
221 | struct aem_read_sensor_req { | |
222 | struct aem_iana_id id; | |
223 | u8 module_handle; | |
224 | u8 element; | |
225 | u8 subcommand; | |
226 | u8 reg; | |
227 | u8 rx_buf_size; | |
228 | } __packed; | |
229 | ||
230 | struct aem_read_sensor_resp { | |
231 | struct aem_iana_id id; | |
232 | u8 bytes[0]; | |
233 | } __packed; | |
234 | ||
235 | /* Data structures to talk to the IPMI layer */ | |
236 | struct aem_driver_data { | |
237 | struct list_head aem_devices; | |
238 | struct ipmi_smi_watcher bmc_events; | |
239 | struct ipmi_user_hndl ipmi_hndlrs; | |
240 | }; | |
241 | ||
242 | static void aem_register_bmc(int iface, struct device *dev); | |
243 | static void aem_bmc_gone(int iface); | |
244 | static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data); | |
245 | ||
246 | static void aem_remove_sensors(struct aem_data *data); | |
247 | static int aem_init_aem1(struct aem_ipmi_data *probe); | |
248 | static int aem_init_aem2(struct aem_ipmi_data *probe); | |
249 | static int aem1_find_sensors(struct aem_data *data); | |
250 | static int aem2_find_sensors(struct aem_data *data); | |
251 | static void update_aem1_sensors(struct aem_data *data); | |
252 | static void update_aem2_sensors(struct aem_data *data); | |
253 | ||
254 | static struct aem_driver_data driver_data = { | |
255 | .aem_devices = LIST_HEAD_INIT(driver_data.aem_devices), | |
256 | .bmc_events = { | |
257 | .owner = THIS_MODULE, | |
258 | .new_smi = aem_register_bmc, | |
259 | .smi_gone = aem_bmc_gone, | |
260 | }, | |
261 | .ipmi_hndlrs = { | |
262 | .ipmi_recv_hndl = aem_msg_handler, | |
263 | }, | |
264 | }; | |
265 | ||
266 | /* Functions to talk to the IPMI layer */ | |
267 | ||
268 | /* Initialize IPMI address, message buffers and user data */ | |
269 | static int aem_init_ipmi_data(struct aem_ipmi_data *data, int iface, | |
270 | struct device *bmc) | |
271 | { | |
272 | int err; | |
273 | ||
274 | init_completion(&data->read_complete); | |
275 | data->bmc_device = bmc; | |
276 | ||
277 | /* Initialize IPMI address */ | |
278 | data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
279 | data->address.channel = IPMI_BMC_CHANNEL; | |
280 | data->address.data[0] = 0; | |
281 | data->interface = iface; | |
282 | ||
283 | /* Initialize message buffers */ | |
284 | data->tx_msgid = 0; | |
285 | data->tx_message.netfn = AEM_NETFN; | |
286 | ||
287 | /* Create IPMI messaging interface user */ | |
288 | err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs, | |
289 | data, &data->user); | |
290 | if (err < 0) { | |
291 | dev_err(bmc, "Unable to register user with IPMI " | |
292 | "interface %d\n", data->interface); | |
293 | return -EACCES; | |
294 | } | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | /* Send an IPMI command */ | |
300 | static int aem_send_message(struct aem_ipmi_data *data) | |
301 | { | |
302 | int err; | |
303 | ||
304 | err = ipmi_validate_addr(&data->address, sizeof(data->address)); | |
305 | if (err) | |
306 | goto out; | |
307 | ||
308 | data->tx_msgid++; | |
309 | err = ipmi_request_settime(data->user, &data->address, data->tx_msgid, | |
310 | &data->tx_message, data, 0, 0, 0); | |
311 | if (err) | |
312 | goto out1; | |
313 | ||
314 | return 0; | |
315 | out1: | |
316 | dev_err(data->bmc_device, "request_settime=%x\n", err); | |
317 | return err; | |
318 | out: | |
319 | dev_err(data->bmc_device, "validate_addr=%x\n", err); | |
320 | return err; | |
321 | } | |
322 | ||
323 | /* Dispatch IPMI messages to callers */ | |
324 | static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data) | |
325 | { | |
326 | unsigned short rx_len; | |
327 | struct aem_ipmi_data *data = user_msg_data; | |
328 | ||
329 | if (msg->msgid != data->tx_msgid) { | |
330 | dev_err(data->bmc_device, "Mismatch between received msgid " | |
331 | "(%02x) and transmitted msgid (%02x)!\n", | |
332 | (int)msg->msgid, | |
333 | (int)data->tx_msgid); | |
334 | ipmi_free_recv_msg(msg); | |
335 | return; | |
336 | } | |
337 | ||
338 | data->rx_recv_type = msg->recv_type; | |
339 | if (msg->msg.data_len > 0) | |
340 | data->rx_result = msg->msg.data[0]; | |
341 | else | |
342 | data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE; | |
343 | ||
344 | if (msg->msg.data_len > 1) { | |
345 | rx_len = msg->msg.data_len - 1; | |
346 | if (data->rx_msg_len < rx_len) | |
347 | rx_len = data->rx_msg_len; | |
348 | data->rx_msg_len = rx_len; | |
349 | memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len); | |
350 | } else | |
351 | data->rx_msg_len = 0; | |
352 | ||
353 | ipmi_free_recv_msg(msg); | |
354 | complete(&data->read_complete); | |
355 | } | |
356 | ||
357 | /* ID functions */ | |
358 | ||
359 | /* Obtain an id */ | |
360 | static int aem_idr_get(int *id) | |
361 | { | |
362 | int i, err; | |
363 | ||
364 | again: | |
365 | if (unlikely(!idr_pre_get(&aem_idr, GFP_KERNEL))) | |
366 | return -ENOMEM; | |
367 | ||
368 | spin_lock(&aem_idr_lock); | |
369 | err = idr_get_new(&aem_idr, NULL, &i); | |
370 | spin_unlock(&aem_idr_lock); | |
371 | ||
372 | if (unlikely(err == -EAGAIN)) | |
373 | goto again; | |
374 | else if (unlikely(err)) | |
375 | return err; | |
376 | ||
377 | *id = i & MAX_ID_MASK; | |
378 | return 0; | |
379 | } | |
380 | ||
381 | /* Release an object ID */ | |
382 | static void aem_idr_put(int id) | |
383 | { | |
384 | spin_lock(&aem_idr_lock); | |
385 | idr_remove(&aem_idr, id); | |
386 | spin_unlock(&aem_idr_lock); | |
387 | } | |
388 | ||
389 | /* Sensor support functions */ | |
390 | ||
391 | /* Read a sensor value */ | |
392 | static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg, | |
393 | void *buf, size_t size) | |
394 | { | |
395 | int rs_size, res; | |
396 | struct aem_read_sensor_req rs_req; | |
397 | struct aem_read_sensor_resp *rs_resp; | |
398 | struct aem_ipmi_data *ipmi = &data->ipmi; | |
399 | ||
400 | /* AEM registers are 1, 2, 4 or 8 bytes */ | |
401 | switch (size) { | |
402 | case 1: | |
403 | case 2: | |
404 | case 4: | |
405 | case 8: | |
406 | break; | |
407 | default: | |
408 | return -EINVAL; | |
409 | } | |
410 | ||
411 | rs_req.id = system_x_id; | |
412 | rs_req.module_handle = data->module_handle; | |
413 | rs_req.element = elt; | |
414 | rs_req.subcommand = AEM_READ_REGISTER; | |
415 | rs_req.reg = reg; | |
416 | rs_req.rx_buf_size = size; | |
417 | ||
418 | ipmi->tx_message.cmd = AEM_ELEMENT_CMD; | |
419 | ipmi->tx_message.data = (char *)&rs_req; | |
420 | ipmi->tx_message.data_len = sizeof(rs_req); | |
421 | ||
422 | rs_size = sizeof(*rs_resp) + size; | |
423 | rs_resp = kzalloc(rs_size, GFP_KERNEL); | |
424 | if (!rs_resp) | |
425 | return -ENOMEM; | |
426 | ||
427 | ipmi->rx_msg_data = rs_resp; | |
428 | ipmi->rx_msg_len = rs_size; | |
429 | ||
430 | aem_send_message(ipmi); | |
431 | ||
432 | res = wait_for_completion_timeout(&ipmi->read_complete, IPMI_TIMEOUT); | |
433 | if (!res) | |
434 | return -ETIMEDOUT; | |
435 | ||
436 | if (ipmi->rx_result || ipmi->rx_msg_len != rs_size || | |
437 | memcmp(&rs_resp->id, &system_x_id, sizeof(system_x_id))) { | |
438 | kfree(rs_resp); | |
439 | return -ENOENT; | |
440 | } | |
441 | ||
442 | switch (size) { | |
443 | case 1: { | |
444 | u8 *x = buf; | |
445 | *x = rs_resp->bytes[0]; | |
446 | break; | |
447 | } | |
448 | case 2: { | |
449 | u16 *x = buf; | |
a064d5bd | 450 | *x = be16_to_cpup((__be16 *)rs_resp->bytes); |
8808a793 DW |
451 | break; |
452 | } | |
453 | case 4: { | |
454 | u32 *x = buf; | |
a064d5bd | 455 | *x = be32_to_cpup((__be32 *)rs_resp->bytes); |
8808a793 DW |
456 | break; |
457 | } | |
458 | case 8: { | |
459 | u64 *x = buf; | |
a064d5bd | 460 | *x = be64_to_cpup((__be64 *)rs_resp->bytes); |
8808a793 DW |
461 | break; |
462 | } | |
463 | } | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | /* Update AEM energy registers */ | |
bb15e7f2 DW |
469 | static void update_aem_energy_one(struct aem_data *data, int which) |
470 | { | |
471 | aem_read_sensor(data, AEM_ENERGY_ELEMENT, which, | |
472 | &data->energy[which], 8); | |
473 | } | |
474 | ||
8808a793 DW |
475 | static void update_aem_energy(struct aem_data *data) |
476 | { | |
bb15e7f2 | 477 | update_aem_energy_one(data, 0); |
8808a793 DW |
478 | if (data->ver_major < 2) |
479 | return; | |
bb15e7f2 | 480 | update_aem_energy_one(data, 1); |
8808a793 DW |
481 | } |
482 | ||
483 | /* Update all AEM1 sensors */ | |
484 | static void update_aem1_sensors(struct aem_data *data) | |
485 | { | |
486 | mutex_lock(&data->lock); | |
487 | if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) && | |
488 | data->valid) | |
489 | goto out; | |
490 | ||
491 | update_aem_energy(data); | |
492 | out: | |
493 | mutex_unlock(&data->lock); | |
494 | } | |
495 | ||
496 | /* Update all AEM2 sensors */ | |
497 | static void update_aem2_sensors(struct aem_data *data) | |
498 | { | |
499 | int i; | |
500 | ||
501 | mutex_lock(&data->lock); | |
502 | if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) && | |
503 | data->valid) | |
504 | goto out; | |
505 | ||
506 | update_aem_energy(data); | |
507 | aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 0, &data->temp[0], 1); | |
508 | aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 1, &data->temp[1], 1); | |
509 | ||
510 | for (i = POWER_CAP; i <= POWER_AUX; i++) | |
511 | aem_read_sensor(data, AEM_POWER_CAP_ELEMENT, i, | |
512 | &data->pcap[i], 2); | |
513 | out: | |
514 | mutex_unlock(&data->lock); | |
515 | } | |
516 | ||
517 | /* Delete an AEM instance */ | |
518 | static void aem_delete(struct aem_data *data) | |
519 | { | |
520 | list_del(&data->list); | |
521 | aem_remove_sensors(data); | |
522 | hwmon_device_unregister(data->hwmon_dev); | |
523 | ipmi_destroy_user(data->ipmi.user); | |
524 | dev_set_drvdata(&data->pdev->dev, NULL); | |
525 | platform_device_unregister(data->pdev); | |
526 | aem_idr_put(data->id); | |
527 | kfree(data); | |
528 | } | |
529 | ||
530 | /* Probe functions for AEM1 devices */ | |
531 | ||
532 | /* Retrieve version and module handle for an AEM1 instance */ | |
533 | static int aem_find_aem1_count(struct aem_ipmi_data *data) | |
534 | { | |
535 | int res; | |
536 | struct aem_find_firmware_req ff_req; | |
537 | struct aem_find_firmware_resp ff_resp; | |
538 | ||
539 | ff_req.id = system_x_id; | |
540 | ff_req.index = 0; | |
541 | ff_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID); | |
542 | ||
543 | data->tx_message.cmd = AEM_FIND_FW_CMD; | |
544 | data->tx_message.data = (char *)&ff_req; | |
545 | data->tx_message.data_len = sizeof(ff_req); | |
546 | ||
547 | data->rx_msg_data = &ff_resp; | |
548 | data->rx_msg_len = sizeof(ff_resp); | |
549 | ||
550 | aem_send_message(data); | |
551 | ||
552 | res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT); | |
553 | if (!res) | |
554 | return -ETIMEDOUT; | |
555 | ||
556 | if (data->rx_result || data->rx_msg_len != sizeof(ff_resp) || | |
557 | memcmp(&ff_resp.id, &system_x_id, sizeof(system_x_id))) | |
558 | return -ENOENT; | |
559 | ||
560 | return ff_resp.num_instances; | |
561 | } | |
562 | ||
563 | /* Find and initialize one AEM1 instance */ | |
564 | static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle) | |
565 | { | |
566 | struct aem_data *data; | |
567 | int i; | |
568 | int res = -ENOMEM; | |
569 | ||
570 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
571 | if (!data) | |
572 | return res; | |
573 | mutex_init(&data->lock); | |
574 | ||
575 | /* Copy instance data */ | |
576 | data->ver_major = 1; | |
577 | data->ver_minor = 0; | |
578 | data->module_handle = module_handle; | |
579 | for (i = 0; i < AEM1_NUM_ENERGY_REGS; i++) | |
580 | data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL; | |
581 | ||
582 | /* Create sub-device for this fw instance */ | |
583 | if (aem_idr_get(&data->id)) | |
584 | goto id_err; | |
585 | ||
586 | data->pdev = platform_device_alloc(DRVNAME, data->id); | |
587 | if (!data->pdev) | |
588 | goto dev_err; | |
fe2d5ffc | 589 | data->pdev->dev.driver = &aem_driver.driver; |
8808a793 DW |
590 | |
591 | res = platform_device_add(data->pdev); | |
592 | if (res) | |
593 | goto ipmi_err; | |
594 | ||
595 | dev_set_drvdata(&data->pdev->dev, data); | |
596 | ||
597 | /* Set up IPMI interface */ | |
598 | if (aem_init_ipmi_data(&data->ipmi, probe->interface, | |
599 | probe->bmc_device)) | |
600 | goto ipmi_err; | |
601 | ||
602 | /* Register with hwmon */ | |
603 | data->hwmon_dev = hwmon_device_register(&data->pdev->dev); | |
604 | ||
605 | if (IS_ERR(data->hwmon_dev)) { | |
606 | dev_err(&data->pdev->dev, "Unable to register hwmon " | |
607 | "device for IPMI interface %d\n", | |
608 | probe->interface); | |
609 | goto hwmon_reg_err; | |
610 | } | |
611 | ||
612 | data->update = update_aem1_sensors; | |
613 | ||
614 | /* Find sensors */ | |
615 | if (aem1_find_sensors(data)) | |
616 | goto sensor_err; | |
617 | ||
618 | /* Add to our list of AEM devices */ | |
619 | list_add_tail(&data->list, &driver_data.aem_devices); | |
620 | ||
621 | dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n", | |
622 | data->ver_major, data->ver_minor, | |
623 | data->module_handle); | |
624 | return 0; | |
625 | ||
626 | sensor_err: | |
627 | hwmon_device_unregister(data->hwmon_dev); | |
628 | hwmon_reg_err: | |
629 | ipmi_destroy_user(data->ipmi.user); | |
630 | ipmi_err: | |
631 | dev_set_drvdata(&data->pdev->dev, NULL); | |
632 | platform_device_unregister(data->pdev); | |
633 | dev_err: | |
634 | aem_idr_put(data->id); | |
635 | id_err: | |
636 | kfree(data); | |
637 | ||
638 | return res; | |
639 | } | |
640 | ||
641 | /* Find and initialize all AEM1 instances */ | |
642 | static int aem_init_aem1(struct aem_ipmi_data *probe) | |
643 | { | |
644 | int num, i, err; | |
645 | ||
646 | num = aem_find_aem1_count(probe); | |
647 | for (i = 0; i < num; i++) { | |
648 | err = aem_init_aem1_inst(probe, i); | |
649 | if (err) { | |
650 | dev_err(probe->bmc_device, | |
651 | "Error %d initializing AEM1 0x%X\n", | |
652 | err, i); | |
653 | return err; | |
654 | } | |
655 | } | |
656 | ||
657 | return 0; | |
658 | } | |
659 | ||
660 | /* Probe functions for AEM2 devices */ | |
661 | ||
662 | /* Retrieve version and module handle for an AEM2 instance */ | |
663 | static int aem_find_aem2(struct aem_ipmi_data *data, | |
664 | struct aem_find_instance_resp *fi_resp, | |
665 | int instance_num) | |
666 | { | |
667 | int res; | |
668 | struct aem_find_instance_req fi_req; | |
669 | ||
670 | fi_req.id = system_x_id; | |
671 | fi_req.instance_number = instance_num; | |
672 | fi_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID); | |
673 | ||
674 | data->tx_message.cmd = AEM_FW_INSTANCE_CMD; | |
675 | data->tx_message.data = (char *)&fi_req; | |
676 | data->tx_message.data_len = sizeof(fi_req); | |
677 | ||
678 | data->rx_msg_data = fi_resp; | |
679 | data->rx_msg_len = sizeof(*fi_resp); | |
680 | ||
681 | aem_send_message(data); | |
682 | ||
683 | res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT); | |
684 | if (!res) | |
685 | return -ETIMEDOUT; | |
686 | ||
687 | if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) || | |
9c5413ea DW |
688 | memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) || |
689 | fi_resp->num_instances <= instance_num) | |
8808a793 DW |
690 | return -ENOENT; |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | /* Find and initialize one AEM2 instance */ | |
696 | static int aem_init_aem2_inst(struct aem_ipmi_data *probe, | |
697 | struct aem_find_instance_resp *fi_resp) | |
698 | { | |
699 | struct aem_data *data; | |
700 | int i; | |
701 | int res = -ENOMEM; | |
702 | ||
703 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
704 | if (!data) | |
705 | return res; | |
706 | mutex_init(&data->lock); | |
707 | ||
708 | /* Copy instance data */ | |
709 | data->ver_major = fi_resp->major; | |
710 | data->ver_minor = fi_resp->minor; | |
711 | data->module_handle = fi_resp->module_handle; | |
712 | for (i = 0; i < AEM2_NUM_ENERGY_REGS; i++) | |
713 | data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL; | |
714 | ||
715 | /* Create sub-device for this fw instance */ | |
716 | if (aem_idr_get(&data->id)) | |
717 | goto id_err; | |
718 | ||
719 | data->pdev = platform_device_alloc(DRVNAME, data->id); | |
720 | if (!data->pdev) | |
721 | goto dev_err; | |
fe2d5ffc | 722 | data->pdev->dev.driver = &aem_driver.driver; |
8808a793 DW |
723 | |
724 | res = platform_device_add(data->pdev); | |
725 | if (res) | |
726 | goto ipmi_err; | |
727 | ||
728 | dev_set_drvdata(&data->pdev->dev, data); | |
729 | ||
730 | /* Set up IPMI interface */ | |
731 | if (aem_init_ipmi_data(&data->ipmi, probe->interface, | |
732 | probe->bmc_device)) | |
733 | goto ipmi_err; | |
734 | ||
735 | /* Register with hwmon */ | |
736 | data->hwmon_dev = hwmon_device_register(&data->pdev->dev); | |
737 | ||
738 | if (IS_ERR(data->hwmon_dev)) { | |
739 | dev_err(&data->pdev->dev, "Unable to register hwmon " | |
740 | "device for IPMI interface %d\n", | |
741 | probe->interface); | |
742 | goto hwmon_reg_err; | |
743 | } | |
744 | ||
745 | data->update = update_aem2_sensors; | |
746 | ||
747 | /* Find sensors */ | |
748 | if (aem2_find_sensors(data)) | |
749 | goto sensor_err; | |
750 | ||
751 | /* Add to our list of AEM devices */ | |
752 | list_add_tail(&data->list, &driver_data.aem_devices); | |
753 | ||
754 | dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n", | |
755 | data->ver_major, data->ver_minor, | |
756 | data->module_handle); | |
757 | return 0; | |
758 | ||
759 | sensor_err: | |
760 | hwmon_device_unregister(data->hwmon_dev); | |
761 | hwmon_reg_err: | |
762 | ipmi_destroy_user(data->ipmi.user); | |
763 | ipmi_err: | |
764 | dev_set_drvdata(&data->pdev->dev, NULL); | |
765 | platform_device_unregister(data->pdev); | |
766 | dev_err: | |
767 | aem_idr_put(data->id); | |
768 | id_err: | |
769 | kfree(data); | |
770 | ||
771 | return res; | |
772 | } | |
773 | ||
774 | /* Find and initialize all AEM2 instances */ | |
775 | static int aem_init_aem2(struct aem_ipmi_data *probe) | |
776 | { | |
777 | struct aem_find_instance_resp fi_resp; | |
778 | int err; | |
779 | int i = 0; | |
780 | ||
781 | while (!aem_find_aem2(probe, &fi_resp, i)) { | |
782 | if (fi_resp.major != 2) { | |
783 | dev_err(probe->bmc_device, "Unknown AEM v%d; please " | |
784 | "report this to the maintainer.\n", | |
785 | fi_resp.major); | |
786 | i++; | |
787 | continue; | |
788 | } | |
789 | err = aem_init_aem2_inst(probe, &fi_resp); | |
790 | if (err) { | |
791 | dev_err(probe->bmc_device, | |
792 | "Error %d initializing AEM2 0x%X\n", | |
793 | err, fi_resp.module_handle); | |
794 | return err; | |
795 | } | |
796 | i++; | |
797 | } | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | /* Probe a BMC for AEM firmware instances */ | |
803 | static void aem_register_bmc(int iface, struct device *dev) | |
804 | { | |
805 | struct aem_ipmi_data probe; | |
806 | ||
807 | if (aem_init_ipmi_data(&probe, iface, dev)) | |
808 | return; | |
809 | ||
810 | /* Ignore probe errors; they won't cause problems */ | |
811 | aem_init_aem1(&probe); | |
812 | aem_init_aem2(&probe); | |
813 | ||
814 | ipmi_destroy_user(probe.user); | |
815 | } | |
816 | ||
817 | /* Handle BMC deletion */ | |
818 | static void aem_bmc_gone(int iface) | |
819 | { | |
820 | struct aem_data *p1, *next1; | |
821 | ||
822 | list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list) | |
823 | if (p1->ipmi.interface == iface) | |
824 | aem_delete(p1); | |
825 | } | |
826 | ||
827 | /* sysfs support functions */ | |
828 | ||
829 | /* AEM device name */ | |
830 | static ssize_t show_name(struct device *dev, struct device_attribute *devattr, | |
831 | char *buf) | |
832 | { | |
833 | struct aem_data *data = dev_get_drvdata(dev); | |
834 | ||
835 | return sprintf(buf, "%s%d\n", DRVNAME, data->ver_major); | |
836 | } | |
837 | static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0); | |
838 | ||
839 | /* AEM device version */ | |
840 | static ssize_t show_version(struct device *dev, | |
841 | struct device_attribute *devattr, | |
842 | char *buf) | |
843 | { | |
844 | struct aem_data *data = dev_get_drvdata(dev); | |
845 | ||
846 | return sprintf(buf, "%d.%d\n", data->ver_major, data->ver_minor); | |
847 | } | |
848 | static SENSOR_DEVICE_ATTR(version, S_IRUGO, show_version, NULL, 0); | |
849 | ||
850 | /* Display power use */ | |
851 | static ssize_t aem_show_power(struct device *dev, | |
852 | struct device_attribute *devattr, | |
853 | char *buf) | |
854 | { | |
855 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
856 | struct aem_data *data = dev_get_drvdata(dev); | |
857 | u64 before, after, delta, time; | |
858 | signed long leftover; | |
859 | struct timespec b, a; | |
860 | ||
861 | mutex_lock(&data->lock); | |
bb15e7f2 | 862 | update_aem_energy_one(data, attr->index); |
8808a793 DW |
863 | getnstimeofday(&b); |
864 | before = data->energy[attr->index]; | |
865 | ||
866 | leftover = schedule_timeout_interruptible( | |
867 | msecs_to_jiffies(data->power_period[attr->index]) | |
868 | ); | |
869 | if (leftover) { | |
870 | mutex_unlock(&data->lock); | |
871 | return 0; | |
872 | } | |
873 | ||
bb15e7f2 | 874 | update_aem_energy_one(data, attr->index); |
8808a793 DW |
875 | getnstimeofday(&a); |
876 | after = data->energy[attr->index]; | |
877 | mutex_unlock(&data->lock); | |
878 | ||
879 | time = timespec_to_ns(&a) - timespec_to_ns(&b); | |
880 | delta = (after - before) * UJ_PER_MJ; | |
881 | ||
882 | return sprintf(buf, "%llu\n", | |
883 | (unsigned long long)div64_u64(delta * NSEC_PER_SEC, time)); | |
884 | } | |
885 | ||
886 | /* Display energy use */ | |
887 | static ssize_t aem_show_energy(struct device *dev, | |
888 | struct device_attribute *devattr, | |
889 | char *buf) | |
890 | { | |
891 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
892 | struct aem_data *a = dev_get_drvdata(dev); | |
bb15e7f2 DW |
893 | mutex_lock(&a->lock); |
894 | update_aem_energy_one(a, attr->index); | |
895 | mutex_unlock(&a->lock); | |
8808a793 DW |
896 | |
897 | return sprintf(buf, "%llu\n", | |
898 | (unsigned long long)a->energy[attr->index] * 1000); | |
899 | } | |
900 | ||
901 | /* Display power interval registers */ | |
902 | static ssize_t aem_show_power_period(struct device *dev, | |
903 | struct device_attribute *devattr, | |
904 | char *buf) | |
905 | { | |
906 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
907 | struct aem_data *a = dev_get_drvdata(dev); | |
908 | a->update(a); | |
909 | ||
910 | return sprintf(buf, "%lu\n", a->power_period[attr->index]); | |
911 | } | |
912 | ||
913 | /* Set power interval registers */ | |
914 | static ssize_t aem_set_power_period(struct device *dev, | |
915 | struct device_attribute *devattr, | |
916 | const char *buf, size_t count) | |
917 | { | |
918 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
919 | struct aem_data *a = dev_get_drvdata(dev); | |
920 | unsigned long temp; | |
921 | int res; | |
922 | ||
923 | res = strict_strtoul(buf, 10, &temp); | |
924 | if (res) | |
925 | return res; | |
926 | ||
927 | if (temp < AEM_MIN_POWER_INTERVAL) | |
928 | return -EINVAL; | |
929 | ||
930 | mutex_lock(&a->lock); | |
931 | a->power_period[attr->index] = temp; | |
932 | mutex_unlock(&a->lock); | |
933 | ||
934 | return count; | |
935 | } | |
936 | ||
937 | /* Discover sensors on an AEM device */ | |
938 | static int aem_register_sensors(struct aem_data *data, | |
939 | struct aem_ro_sensor_template *ro, | |
940 | struct aem_rw_sensor_template *rw) | |
941 | { | |
942 | struct device *dev = &data->pdev->dev; | |
943 | struct sensor_device_attribute *sensors = data->sensors; | |
944 | int err; | |
945 | ||
946 | /* Set up read-only sensors */ | |
947 | while (ro->label) { | |
948 | sensors->dev_attr.attr.name = ro->label; | |
949 | sensors->dev_attr.attr.mode = S_IRUGO; | |
950 | sensors->dev_attr.show = ro->show; | |
951 | sensors->index = ro->index; | |
952 | ||
953 | err = device_create_file(dev, &sensors->dev_attr); | |
954 | if (err) { | |
955 | sensors->dev_attr.attr.name = NULL; | |
956 | goto error; | |
957 | } | |
958 | sensors++; | |
959 | ro++; | |
960 | } | |
961 | ||
962 | /* Set up read-write sensors */ | |
963 | while (rw->label) { | |
964 | sensors->dev_attr.attr.name = rw->label; | |
965 | sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR; | |
966 | sensors->dev_attr.show = rw->show; | |
967 | sensors->dev_attr.store = rw->set; | |
968 | sensors->index = rw->index; | |
969 | ||
970 | err = device_create_file(dev, &sensors->dev_attr); | |
971 | if (err) { | |
972 | sensors->dev_attr.attr.name = NULL; | |
973 | goto error; | |
974 | } | |
975 | sensors++; | |
976 | rw++; | |
977 | } | |
978 | ||
979 | err = device_create_file(dev, &sensor_dev_attr_name.dev_attr); | |
980 | if (err) | |
981 | goto error; | |
982 | err = device_create_file(dev, &sensor_dev_attr_version.dev_attr); | |
983 | return err; | |
984 | ||
985 | error: | |
986 | aem_remove_sensors(data); | |
987 | return err; | |
988 | } | |
989 | ||
990 | /* sysfs support functions for AEM2 sensors */ | |
991 | ||
992 | /* Display temperature use */ | |
993 | static ssize_t aem2_show_temp(struct device *dev, | |
994 | struct device_attribute *devattr, | |
995 | char *buf) | |
996 | { | |
997 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
998 | struct aem_data *a = dev_get_drvdata(dev); | |
999 | a->update(a); | |
1000 | ||
1001 | return sprintf(buf, "%u\n", a->temp[attr->index] * 1000); | |
1002 | } | |
1003 | ||
1004 | /* Display power-capping registers */ | |
1005 | static ssize_t aem2_show_pcap_value(struct device *dev, | |
1006 | struct device_attribute *devattr, | |
1007 | char *buf) | |
1008 | { | |
1009 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
1010 | struct aem_data *a = dev_get_drvdata(dev); | |
1011 | a->update(a); | |
1012 | ||
1013 | return sprintf(buf, "%u\n", a->pcap[attr->index] * 100000); | |
1014 | } | |
1015 | ||
1016 | /* Remove sensors attached to an AEM device */ | |
1017 | static void aem_remove_sensors(struct aem_data *data) | |
1018 | { | |
1019 | int i; | |
1020 | ||
1021 | for (i = 0; i < AEM_NUM_SENSORS; i++) { | |
1022 | if (!data->sensors[i].dev_attr.attr.name) | |
1023 | continue; | |
1024 | device_remove_file(&data->pdev->dev, | |
1025 | &data->sensors[i].dev_attr); | |
1026 | } | |
1027 | ||
1028 | device_remove_file(&data->pdev->dev, | |
1029 | &sensor_dev_attr_name.dev_attr); | |
1030 | device_remove_file(&data->pdev->dev, | |
1031 | &sensor_dev_attr_version.dev_attr); | |
1032 | } | |
1033 | ||
1034 | /* Sensor probe functions */ | |
1035 | ||
1036 | /* Description of AEM1 sensors */ | |
1037 | static struct aem_ro_sensor_template aem1_ro_sensors[] = { | |
1038 | {"energy1_input", aem_show_energy, 0}, | |
1039 | {"power1_average", aem_show_power, 0}, | |
1040 | {NULL, NULL, 0}, | |
1041 | }; | |
1042 | ||
1043 | static struct aem_rw_sensor_template aem1_rw_sensors[] = { | |
1044 | {"power1_average_interval", aem_show_power_period, aem_set_power_period, 0}, | |
1045 | {NULL, NULL, NULL, 0}, | |
1046 | }; | |
1047 | ||
1048 | /* Description of AEM2 sensors */ | |
1049 | static struct aem_ro_sensor_template aem2_ro_sensors[] = { | |
1050 | {"energy1_input", aem_show_energy, 0}, | |
1051 | {"energy2_input", aem_show_energy, 1}, | |
1052 | {"power1_average", aem_show_power, 0}, | |
1053 | {"power2_average", aem_show_power, 1}, | |
1054 | {"temp1_input", aem2_show_temp, 0}, | |
1055 | {"temp2_input", aem2_show_temp, 1}, | |
1056 | ||
1057 | {"power4_average", aem2_show_pcap_value, POWER_CAP_MAX_HOTPLUG}, | |
1058 | {"power5_average", aem2_show_pcap_value, POWER_CAP_MAX}, | |
1059 | {"power6_average", aem2_show_pcap_value, POWER_CAP_MIN_WARNING}, | |
1060 | {"power7_average", aem2_show_pcap_value, POWER_CAP_MIN}, | |
1061 | ||
1062 | {"power3_average", aem2_show_pcap_value, POWER_AUX}, | |
1063 | {"power_cap", aem2_show_pcap_value, POWER_CAP}, | |
1064 | {NULL, NULL, 0}, | |
1065 | }; | |
1066 | ||
1067 | static struct aem_rw_sensor_template aem2_rw_sensors[] = { | |
1068 | {"power1_average_interval", aem_show_power_period, aem_set_power_period, 0}, | |
1069 | {"power2_average_interval", aem_show_power_period, aem_set_power_period, 1}, | |
1070 | {NULL, NULL, NULL, 0}, | |
1071 | }; | |
1072 | ||
1073 | /* Set up AEM1 sensor attrs */ | |
1074 | static int aem1_find_sensors(struct aem_data *data) | |
1075 | { | |
1076 | return aem_register_sensors(data, aem1_ro_sensors, aem1_rw_sensors); | |
1077 | } | |
1078 | ||
1079 | /* Set up AEM2 sensor attrs */ | |
1080 | static int aem2_find_sensors(struct aem_data *data) | |
1081 | { | |
1082 | return aem_register_sensors(data, aem2_ro_sensors, aem2_rw_sensors); | |
1083 | } | |
1084 | ||
1085 | /* Module init/exit routines */ | |
1086 | ||
1087 | static int __init aem_init(void) | |
1088 | { | |
1089 | int res; | |
1090 | ||
fe2d5ffc | 1091 | res = driver_register(&aem_driver.driver); |
8808a793 DW |
1092 | if (res) { |
1093 | printk(KERN_ERR "Can't register aem driver\n"); | |
1094 | return res; | |
1095 | } | |
1096 | ||
1097 | res = ipmi_smi_watcher_register(&driver_data.bmc_events); | |
1098 | if (res) | |
1099 | goto ipmi_reg_err; | |
1100 | return 0; | |
1101 | ||
1102 | ipmi_reg_err: | |
fe2d5ffc | 1103 | driver_unregister(&aem_driver.driver); |
8808a793 DW |
1104 | return res; |
1105 | ||
1106 | } | |
1107 | ||
1108 | static void __exit aem_exit(void) | |
1109 | { | |
1110 | struct aem_data *p1, *next1; | |
1111 | ||
1112 | ipmi_smi_watcher_unregister(&driver_data.bmc_events); | |
fe2d5ffc | 1113 | driver_unregister(&aem_driver.driver); |
8808a793 DW |
1114 | list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list) |
1115 | aem_delete(p1); | |
1116 | } | |
1117 | ||
1118 | MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>"); | |
eb93b7df | 1119 | MODULE_DESCRIPTION("IBM AEM power/temp/energy sensor driver"); |
8808a793 DW |
1120 | MODULE_LICENSE("GPL"); |
1121 | ||
1122 | module_init(aem_init); | |
1123 | module_exit(aem_exit); | |
21d93c14 DW |
1124 | |
1125 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3350-*"); | |
1126 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3550-*"); | |
1127 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3650-*"); | |
1128 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3655-*"); | |
1129 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3755-*"); | |
1130 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBM3850M2/x3950M2-*"); | |
8070408b | 1131 | MODULE_ALIAS("dmi:bvnIBM:*:pnIBMBladeHC10-*"); |