projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[deliverable/linux.git] / drivers / hwmon / ibmaem.c
CommitLineData
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
55d705cc
JP		 23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
8808a793
DW		 25#include <linux/ipmi.h>
26#include <linux/module.h>
27#include <linux/hwmon.h>
28#include <linux/hwmon-sysfs.h>
29#include <linux/jiffies.h>
30#include <linux/mutex.h>
31#include <linux/kdev_t.h>
32#include <linux/spinlock.h>
33#include <linux/idr.h>
5a0e3ad6 34#include <linux/slab.h>
8808a793
DW		 35#include <linux/sched.h>
36#include <linux/platform_device.h>
37#include <linux/math64.h>
38#include <linux/time.h>
39
40#define REFRESH_INTERVAL (HZ)
41#define IPMI_TIMEOUT (30 * HZ)
42#define DRVNAME "aem"
43
44#define AEM_NETFN 0x2E
45
46#define AEM_FIND_FW_CMD 0x80
47#define AEM_ELEMENT_CMD 0x81
48#define AEM_FW_INSTANCE_CMD 0x82
49
50#define AEM_READ_ELEMENT_CFG 0x80
51#define AEM_READ_BUFFER 0x81
52#define AEM_READ_REGISTER 0x82
53#define AEM_WRITE_REGISTER 0x83
54#define AEM_SET_REG_MASK 0x84
55#define AEM_CLEAR_REG_MASK 0x85
56#define AEM_READ_ELEMENT_CFG2 0x86
57
58#define AEM_CONTROL_ELEMENT 0
59#define AEM_ENERGY_ELEMENT 1
60#define AEM_CLOCK_ELEMENT 4
61#define AEM_POWER_CAP_ELEMENT 7
62#define AEM_EXHAUST_ELEMENT 9
63#define AEM_POWER_ELEMENT 10
64
65#define AEM_MODULE_TYPE_ID 0x0001
66
67#define AEM2_NUM_ENERGY_REGS 2
68#define AEM2_NUM_PCAP_REGS 6
69#define AEM2_NUM_TEMP_REGS 2
70#define AEM2_NUM_SENSORS 14
71
72#define AEM1_NUM_ENERGY_REGS 1
73#define AEM1_NUM_SENSORS 3
74
75/* AEM 2.x has more energy registers */
76#define AEM_NUM_ENERGY_REGS AEM2_NUM_ENERGY_REGS
77/* AEM 2.x needs more sensor files */
78#define AEM_NUM_SENSORS AEM2_NUM_SENSORS
79
80#define POWER_CAP 0
81#define POWER_CAP_MAX_HOTPLUG 1
82#define POWER_CAP_MAX 2
83#define POWER_CAP_MIN_WARNING 3
84#define POWER_CAP_MIN 4
85#define POWER_AUX 5
86
87#define AEM_DEFAULT_POWER_INTERVAL 1000
88#define AEM_MIN_POWER_INTERVAL 200
89#define UJ_PER_MJ 1000L
90
65807044 91static DEFINE_IDA(aem_ida);
8808a793 92
fe2d5ffc
DW		 93static struct platform_driver aem_driver = {
94 .driver = {
95 .name = DRVNAME,
96 .bus = &platform_bus_type,
97 }
8808a793
DW		 98};
99
100struct aem_ipmi_data {
101 struct completion read_complete;
102 struct ipmi_addr address;
103 ipmi_user_t user;
104 int interface;
105
106 struct kernel_ipmi_msg tx_message;
107 long tx_msgid;
108
109 void *rx_msg_data;
110 unsigned short rx_msg_len;
111 unsigned char rx_result;
112 int rx_recv_type;
113
114 struct device *bmc_device;
115};
116
117struct aem_ro_sensor_template {
118 char *label;
119 ssize_t (*show)(struct device *dev,
120 struct device_attribute *devattr,
121 char *buf);
122 int index;
123};
124
125struct aem_rw_sensor_template {
126 char *label;
127 ssize_t (*show)(struct device *dev,
128 struct device_attribute *devattr,
129 char *buf);
130 ssize_t (*set)(struct device *dev,
131 struct device_attribute *devattr,
132 const char *buf, size_t count);
133 int index;
134};
135
136struct aem_data {
137 struct list_head list;
138
139 struct device *hwmon_dev;
140 struct platform_device *pdev;
141 struct mutex lock;
142 char valid;
143 unsigned long last_updated; /* In jiffies */
144 u8 ver_major;
145 u8 ver_minor;
146 u8 module_handle;
147 int id;
148 struct aem_ipmi_data ipmi;
149
150 /* Function to update sensors */
151 void (*update)(struct aem_data *data);
152
153 /*
154 * AEM 1.x sensors:
155 * Available sensors:
156 * Energy meter
157 * Power meter
158 *
159 * AEM 2.x sensors:
160 * Two energy meters
161 * Two power meters
162 * Two temperature sensors
163 * Six power cap registers
164 */
165
166 /* sysfs attrs */
167 struct sensor_device_attribute sensors[AEM_NUM_SENSORS];
168
169 /* energy use in mJ */
170 u64 energy[AEM_NUM_ENERGY_REGS];
171
172 /* power sampling interval in ms */
173 unsigned long power_period[AEM_NUM_ENERGY_REGS];
174
175 /* Everything past here is for AEM2 only */
176
177 /* power caps in dW */
178 u16 pcap[AEM2_NUM_PCAP_REGS];
179
180 /* exhaust temperature in C */
181 u8 temp[AEM2_NUM_TEMP_REGS];
182};
183
184/* Data structures returned by the AEM firmware */
185struct aem_iana_id {
186 u8 bytes[3];
187};
188static struct aem_iana_id system_x_id = {
189 .bytes = {0x4D, 0x4F, 0x00}
190};
191
192/* These are used to find AEM1 instances */
193struct aem_find_firmware_req {
194 struct aem_iana_id id;
195 u8 rsvd;
a064d5bd
AV		 196 __be16 index;
197 __be16 module_type_id;
8808a793
DW		 198} __packed;
199
200struct aem_find_firmware_resp {
201 struct aem_iana_id id;
202 u8 num_instances;
203} __packed;
204
205/* These are used to find AEM2 instances */
206struct aem_find_instance_req {
207 struct aem_iana_id id;
208 u8 instance_number;
a064d5bd 209 __be16 module_type_id;
8808a793
DW		 210} __packed;
211
212struct aem_find_instance_resp {
213 struct aem_iana_id id;
214 u8 num_instances;
215 u8 major;
216 u8 minor;
217 u8 module_handle;
218 u16 record_id;
219} __packed;
220
221/* These are used to query sensors */
222struct aem_read_sensor_req {
223 struct aem_iana_id id;
224 u8 module_handle;
225 u8 element;
226 u8 subcommand;
227 u8 reg;
228 u8 rx_buf_size;
229} __packed;
230
231struct aem_read_sensor_resp {
232 struct aem_iana_id id;
233 u8 bytes[0];
234} __packed;
235
236/* Data structures to talk to the IPMI layer */
237struct aem_driver_data {
238 struct list_head aem_devices;
239 struct ipmi_smi_watcher bmc_events;
240 struct ipmi_user_hndl ipmi_hndlrs;
241};
242
243static void aem_register_bmc(int iface, struct device *dev);
244static void aem_bmc_gone(int iface);
245static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
246
247static void aem_remove_sensors(struct aem_data *data);
248static int aem_init_aem1(struct aem_ipmi_data *probe);
249static int aem_init_aem2(struct aem_ipmi_data *probe);
250static int aem1_find_sensors(struct aem_data *data);
251static int aem2_find_sensors(struct aem_data *data);
252static void update_aem1_sensors(struct aem_data *data);
253static void update_aem2_sensors(struct aem_data *data);
254
255static struct aem_driver_data driver_data = {
256 .aem_devices = LIST_HEAD_INIT(driver_data.aem_devices),
257 .bmc_events = {
258 .owner = THIS_MODULE,
259 .new_smi = aem_register_bmc,
260 .smi_gone = aem_bmc_gone,
261 },
262 .ipmi_hndlrs = {
263 .ipmi_recv_hndl = aem_msg_handler,
264 },
265};
266
267/* Functions to talk to the IPMI layer */
268
269/* Initialize IPMI address, message buffers and user data */
270static int aem_init_ipmi_data(struct aem_ipmi_data *data, int iface,
271 struct device *bmc)
272{
273 int err;
274
275 init_completion(&data->read_complete);
276 data->bmc_device = bmc;
277
278 /* Initialize IPMI address */
279 data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
280 data->address.channel = IPMI_BMC_CHANNEL;
281 data->address.data[0] = 0;
282 data->interface = iface;
283
284 /* Initialize message buffers */
285 data->tx_msgid = 0;
286 data->tx_message.netfn = AEM_NETFN;
287
288 /* Create IPMI messaging interface user */
289 err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs,
290 data, &data->user);
291 if (err < 0) {
292 dev_err(bmc, "Unable to register user with IPMI "
293 "interface %d\n", data->interface);
294 return -EACCES;
295 }
296
297 return 0;
298}
299
300/* Send an IPMI command */
301static int aem_send_message(struct aem_ipmi_data *data)
302{
303 int err;
304
305 err = ipmi_validate_addr(&data->address, sizeof(data->address));
306 if (err)
307 goto out;
308
309 data->tx_msgid++;
310 err = ipmi_request_settime(data->user, &data->address, data->tx_msgid,
311 &data->tx_message, data, 0, 0, 0);
312 if (err)
313 goto out1;
314
315 return 0;
316out1:
317 dev_err(data->bmc_device, "request_settime=%x\n", err);
318 return err;
319out:
320 dev_err(data->bmc_device, "validate_addr=%x\n", err);
321 return err;
322}
323
324/* Dispatch IPMI messages to callers */
325static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
326{
327 unsigned short rx_len;
328 struct aem_ipmi_data *data = user_msg_data;
329
330 if (msg->msgid != data->tx_msgid) {
331 dev_err(data->bmc_device, "Mismatch between received msgid "
332 "(%02x) and transmitted msgid (%02x)!\n",
333 (int)msg->msgid,
334 (int)data->tx_msgid);
335 ipmi_free_recv_msg(msg);
336 return;
337 }
338
339 data->rx_recv_type = msg->recv_type;
340 if (msg->msg.data_len > 0)
341 data->rx_result = msg->msg.data[0];
342 else
343 data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE;
344
345 if (msg->msg.data_len > 1) {
346 rx_len = msg->msg.data_len - 1;
347 if (data->rx_msg_len < rx_len)
348 rx_len = data->rx_msg_len;
349 data->rx_msg_len = rx_len;
350 memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len);
351 } else
352 data->rx_msg_len = 0;
353
354 ipmi_free_recv_msg(msg);
355 complete(&data->read_complete);
356}
357
8808a793
DW		 358/* Sensor support functions */
359
360/* Read a sensor value */
361static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
362 void *buf, size_t size)
363{
364 int rs_size, res;
365 struct aem_read_sensor_req rs_req;
366 struct aem_read_sensor_resp *rs_resp;
367 struct aem_ipmi_data *ipmi = &data->ipmi;
368
369 /* AEM registers are 1, 2, 4 or 8 bytes */
370 switch (size) {
371 case 1:
372 case 2:
373 case 4:
374 case 8:
375 break;
376 default:
377 return -EINVAL;
378 }
379
380 rs_req.id = system_x_id;
381 rs_req.module_handle = data->module_handle;
382 rs_req.element = elt;
383 rs_req.subcommand = AEM_READ_REGISTER;
384 rs_req.reg = reg;
385 rs_req.rx_buf_size = size;
386
387 ipmi->tx_message.cmd = AEM_ELEMENT_CMD;
388 ipmi->tx_message.data = (char *)&rs_req;
389 ipmi->tx_message.data_len = sizeof(rs_req);
390
391 rs_size = sizeof(*rs_resp) + size;
392 rs_resp = kzalloc(rs_size, GFP_KERNEL);
393 if (!rs_resp)
394 return -ENOMEM;
395
396 ipmi->rx_msg_data = rs_resp;
397 ipmi->rx_msg_len = rs_size;
398
399 aem_send_message(ipmi);
400
401 res = wait_for_completion_timeout(&ipmi->read_complete, IPMI_TIMEOUT);
66a89b21
JL		 402 if (!res) {
403 res = -ETIMEDOUT;
404 goto out;
405 }
8808a793
DW		 406
407 if (ipmi->rx_result || ipmi->rx_msg_len != rs_size ||
408 memcmp(&rs_resp->id, &system_x_id, sizeof(system_x_id))) {
66a89b21
JL		 409 res = -ENOENT;
410 goto out;
8808a793
DW		 411 }
412
413 switch (size) {
414 case 1: {
415 u8 *x = buf;
416 *x = rs_resp->bytes[0];
417 break;
418 }
419 case 2: {
420 u16 *x = buf;
a064d5bd 421 *x = be16_to_cpup((__be16 *)rs_resp->bytes);
8808a793
DW		 422 break;
423 }
424 case 4: {
425 u32 *x = buf;
a064d5bd 426 *x = be32_to_cpup((__be32 *)rs_resp->bytes);
8808a793
DW		 427 break;
428 }
429 case 8: {
430 u64 *x = buf;
a064d5bd 431 *x = be64_to_cpup((__be64 *)rs_resp->bytes);
8808a793
DW		 432 break;
433 }
434 }
66a89b21 435 res = 0;
8808a793 436
66a89b21
JL		 437out:
438 kfree(rs_resp);
439 return res;
8808a793
DW		 440}
441
442/* Update AEM energy registers */
bb15e7f2
DW		 443static void update_aem_energy_one(struct aem_data *data, int which)
444{
445 aem_read_sensor(data, AEM_ENERGY_ELEMENT, which,
446 &data->energy[which], 8);
447}
448
8808a793
DW		 449static void update_aem_energy(struct aem_data *data)
450{
bb15e7f2 451 update_aem_energy_one(data, 0);
8808a793
DW		 452 if (data->ver_major < 2)
453 return;
bb15e7f2 454 update_aem_energy_one(data, 1);
8808a793
DW		 455}
456
457/* Update all AEM1 sensors */
458static void update_aem1_sensors(struct aem_data *data)
459{
460 mutex_lock(&data->lock);
461 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
462 data->valid)
463 goto out;
464
465 update_aem_energy(data);
466out:
467 mutex_unlock(&data->lock);
468}
469
470/* Update all AEM2 sensors */
471static void update_aem2_sensors(struct aem_data *data)
472{
473 int i;
474
475 mutex_lock(&data->lock);
476 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
477 data->valid)
478 goto out;
479
480 update_aem_energy(data);
481 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 0, &data->temp[0], 1);
482 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 1, &data->temp[1], 1);
483
484 for (i = POWER_CAP; i <= POWER_AUX; i++)
485 aem_read_sensor(data, AEM_POWER_CAP_ELEMENT, i,
486 &data->pcap[i], 2);
487out:
488 mutex_unlock(&data->lock);
489}
490
491/* Delete an AEM instance */
492static void aem_delete(struct aem_data *data)
493{
494 list_del(&data->list);
495 aem_remove_sensors(data);
496 hwmon_device_unregister(data->hwmon_dev);
497 ipmi_destroy_user(data->ipmi.user);
95de3b25 498 platform_set_drvdata(data->pdev, NULL);
8808a793 499 platform_device_unregister(data->pdev);
65807044 500 ida_simple_remove(&aem_ida, data->id);
8808a793
DW		 501 kfree(data);
502}
503
504/* Probe functions for AEM1 devices */
505
506/* Retrieve version and module handle for an AEM1 instance */
507static int aem_find_aem1_count(struct aem_ipmi_data *data)
508{
509 int res;
510 struct aem_find_firmware_req ff_req;
511 struct aem_find_firmware_resp ff_resp;
512
513 ff_req.id = system_x_id;
514 ff_req.index = 0;
515 ff_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
516
517 data->tx_message.cmd = AEM_FIND_FW_CMD;
518 data->tx_message.data = (char *)&ff_req;
519 data->tx_message.data_len = sizeof(ff_req);
520
521 data->rx_msg_data = &ff_resp;
522 data->rx_msg_len = sizeof(ff_resp);
523
524 aem_send_message(data);
525
526 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
527 if (!res)
528 return -ETIMEDOUT;
529
530 if (data->rx_result || data->rx_msg_len != sizeof(ff_resp) ||
531 memcmp(&ff_resp.id, &system_x_id, sizeof(system_x_id)))
532 return -ENOENT;
533
534 return ff_resp.num_instances;
535}
536
537/* Find and initialize one AEM1 instance */
538static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
539{
540 struct aem_data *data;
541 int i;
542 int res = -ENOMEM;
543
544 data = kzalloc(sizeof(*data), GFP_KERNEL);
545 if (!data)
546 return res;
547 mutex_init(&data->lock);
548
549 /* Copy instance data */
550 data->ver_major = 1;
551 data->ver_minor = 0;
552 data->module_handle = module_handle;
553 for (i = 0; i < AEM1_NUM_ENERGY_REGS; i++)
554 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
555
556 /* Create sub-device for this fw instance */
65807044
JC		 557 data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
558 if (data->id < 0)
8808a793
DW		 559 goto id_err;
560
561 data->pdev = platform_device_alloc(DRVNAME, data->id);
562 if (!data->pdev)
563 goto dev_err;
fe2d5ffc 564 data->pdev->dev.driver = &aem_driver.driver;
8808a793
DW		 565
566 res = platform_device_add(data->pdev);
567 if (res)
568 goto ipmi_err;
569
95de3b25 570 platform_set_drvdata(data->pdev, data);
8808a793
DW		 571
572 /* Set up IPMI interface */
573 if (aem_init_ipmi_data(&data->ipmi, probe->interface,
574 probe->bmc_device))
575 goto ipmi_err;
576
577 /* Register with hwmon */
578 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
579
580 if (IS_ERR(data->hwmon_dev)) {
581 dev_err(&data->pdev->dev, "Unable to register hwmon "
582 "device for IPMI interface %d\n",
583 probe->interface);
584 goto hwmon_reg_err;
585 }
586
587 data->update = update_aem1_sensors;
588
589 /* Find sensors */
590 if (aem1_find_sensors(data))
591 goto sensor_err;
592
593 /* Add to our list of AEM devices */
594 list_add_tail(&data->list, &driver_data.aem_devices);
595
596 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
597 data->ver_major, data->ver_minor,
598 data->module_handle);
599 return 0;
600
601sensor_err:
602 hwmon_device_unregister(data->hwmon_dev);
603hwmon_reg_err:
604 ipmi_destroy_user(data->ipmi.user);
605ipmi_err:
95de3b25 606 platform_set_drvdata(data->pdev, NULL);
8808a793
DW		 607 platform_device_unregister(data->pdev);
608dev_err:
65807044 609 ida_simple_remove(&aem_ida, data->id);
8808a793
DW		 610id_err:
611 kfree(data);
612
613 return res;
614}
615
616/* Find and initialize all AEM1 instances */
617static int aem_init_aem1(struct aem_ipmi_data *probe)
618{
619 int num, i, err;
620
621 num = aem_find_aem1_count(probe);
622 for (i = 0; i < num; i++) {
623 err = aem_init_aem1_inst(probe, i);
624 if (err) {
625 dev_err(probe->bmc_device,
626 "Error %d initializing AEM1 0x%X\n",
627 err, i);
628 return err;
629 }
630 }
631
632 return 0;
633}
634
635/* Probe functions for AEM2 devices */
636
637/* Retrieve version and module handle for an AEM2 instance */
638static int aem_find_aem2(struct aem_ipmi_data *data,
639 struct aem_find_instance_resp *fi_resp,
640 int instance_num)
641{
642 int res;
643 struct aem_find_instance_req fi_req;
644
645 fi_req.id = system_x_id;
646 fi_req.instance_number = instance_num;
647 fi_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
648
649 data->tx_message.cmd = AEM_FW_INSTANCE_CMD;
650 data->tx_message.data = (char *)&fi_req;
651 data->tx_message.data_len = sizeof(fi_req);
652
653 data->rx_msg_data = fi_resp;
654 data->rx_msg_len = sizeof(*fi_resp);
655
656 aem_send_message(data);
657
658 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
659 if (!res)
660 return -ETIMEDOUT;
661
662 if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) ||
9c5413ea
DW		 663 memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) ||
664 fi_resp->num_instances <= instance_num)
8808a793
DW		 665 return -ENOENT;
666
667 return 0;
668}
669
670/* Find and initialize one AEM2 instance */
671static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
672 struct aem_find_instance_resp *fi_resp)
673{
674 struct aem_data *data;
675 int i;
676 int res = -ENOMEM;
677
678 data = kzalloc(sizeof(*data), GFP_KERNEL);
679 if (!data)
680 return res;
681 mutex_init(&data->lock);
682
683 /* Copy instance data */
684 data->ver_major = fi_resp->major;
685 data->ver_minor = fi_resp->minor;
686 data->module_handle = fi_resp->module_handle;
687 for (i = 0; i < AEM2_NUM_ENERGY_REGS; i++)
688 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
689
690 /* Create sub-device for this fw instance */
65807044
JC		 691 data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
692 if (data->id < 0)
8808a793
DW		 693 goto id_err;
694
695 data->pdev = platform_device_alloc(DRVNAME, data->id);
696 if (!data->pdev)
697 goto dev_err;
fe2d5ffc 698 data->pdev->dev.driver = &aem_driver.driver;
8808a793
DW		 699
700 res = platform_device_add(data->pdev);
701 if (res)
702 goto ipmi_err;
703
95de3b25 704 platform_set_drvdata(data->pdev, data);
8808a793
DW		 705
706 /* Set up IPMI interface */
707 if (aem_init_ipmi_data(&data->ipmi, probe->interface,
708 probe->bmc_device))
709 goto ipmi_err;
710
711 /* Register with hwmon */
712 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
713
714 if (IS_ERR(data->hwmon_dev)) {
715 dev_err(&data->pdev->dev, "Unable to register hwmon "
716 "device for IPMI interface %d\n",
717 probe->interface);
718 goto hwmon_reg_err;
719 }
720
721 data->update = update_aem2_sensors;
722
723 /* Find sensors */
724 if (aem2_find_sensors(data))
725 goto sensor_err;
726
727 /* Add to our list of AEM devices */
728 list_add_tail(&data->list, &driver_data.aem_devices);
729
730 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
731 data->ver_major, data->ver_minor,
732 data->module_handle);
733 return 0;
734
735sensor_err:
736 hwmon_device_unregister(data->hwmon_dev);
737hwmon_reg_err:
738 ipmi_destroy_user(data->ipmi.user);
739ipmi_err:
95de3b25 740 platform_set_drvdata(data->pdev, NULL);
8808a793
DW		 741 platform_device_unregister(data->pdev);
742dev_err:
65807044 743 ida_simple_remove(&aem_ida, data->id);
8808a793
DW		 744id_err:
745 kfree(data);
746
747 return res;
748}
749
750/* Find and initialize all AEM2 instances */
751static int aem_init_aem2(struct aem_ipmi_data *probe)
752{
753 struct aem_find_instance_resp fi_resp;
754 int err;
755 int i = 0;
756
757 while (!aem_find_aem2(probe, &fi_resp, i)) {
758 if (fi_resp.major != 2) {
759 dev_err(probe->bmc_device, "Unknown AEM v%d; please "
760 "report this to the maintainer.\n",
761 fi_resp.major);
762 i++;
763 continue;
764 }
765 err = aem_init_aem2_inst(probe, &fi_resp);
766 if (err) {
767 dev_err(probe->bmc_device,
768 "Error %d initializing AEM2 0x%X\n",
769 err, fi_resp.module_handle);
770 return err;
771 }
772 i++;
773 }
774
775 return 0;
776}
777
778/* Probe a BMC for AEM firmware instances */
779static void aem_register_bmc(int iface, struct device *dev)
780{
781 struct aem_ipmi_data probe;
782
783 if (aem_init_ipmi_data(&probe, iface, dev))
784 return;
785
786 /* Ignore probe errors; they won't cause problems */
787 aem_init_aem1(&probe);
788 aem_init_aem2(&probe);
789
790 ipmi_destroy_user(probe.user);
791}
792
793/* Handle BMC deletion */
794static void aem_bmc_gone(int iface)
795{
796 struct aem_data *p1, *next1;
797
798 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
799 if (p1->ipmi.interface == iface)
800 aem_delete(p1);
801}
802
803/* sysfs support functions */
804
805/* AEM device name */
806static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
807 char *buf)
808{
809 struct aem_data *data = dev_get_drvdata(dev);
810
811 return sprintf(buf, "%s%d\n", DRVNAME, data->ver_major);
812}
813static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
814
815/* AEM device version */
816static ssize_t show_version(struct device *dev,
817 struct device_attribute *devattr,
818 char *buf)
819{
820 struct aem_data *data = dev_get_drvdata(dev);
821
822 return sprintf(buf, "%d.%d\n", data->ver_major, data->ver_minor);
823}
824static SENSOR_DEVICE_ATTR(version, S_IRUGO, show_version, NULL, 0);
825
826/* Display power use */
827static ssize_t aem_show_power(struct device *dev,
828 struct device_attribute *devattr,
829 char *buf)
830{
831 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
832 struct aem_data *data = dev_get_drvdata(dev);
833 u64 before, after, delta, time;
834 signed long leftover;
835 struct timespec b, a;
836
837 mutex_lock(&data->lock);
bb15e7f2 838 update_aem_energy_one(data, attr->index);
8808a793
DW		 839 getnstimeofday(&b);
840 before = data->energy[attr->index];
841
842 leftover = schedule_timeout_interruptible(
843 msecs_to_jiffies(data->power_period[attr->index])
844 );
845 if (leftover) {
846 mutex_unlock(&data->lock);
847 return 0;
848 }
849
bb15e7f2 850 update_aem_energy_one(data, attr->index);
8808a793
DW		 851 getnstimeofday(&a);
852 after = data->energy[attr->index];
853 mutex_unlock(&data->lock);
854
855 time = timespec_to_ns(&a) - timespec_to_ns(&b);
856 delta = (after - before) * UJ_PER_MJ;
857
858 return sprintf(buf, "%llu\n",
859 (unsigned long long)div64_u64(delta * NSEC_PER_SEC, time));
860}
861
862/* Display energy use */
863static ssize_t aem_show_energy(struct device *dev,
864 struct device_attribute *devattr,
865 char *buf)
866{
867 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
868 struct aem_data *a = dev_get_drvdata(dev);
bb15e7f2
DW		 869 mutex_lock(&a->lock);
870 update_aem_energy_one(a, attr->index);
871 mutex_unlock(&a->lock);
8808a793
DW		 872
873 return sprintf(buf, "%llu\n",
874 (unsigned long long)a->energy[attr->index] * 1000);
875}
876
877/* Display power interval registers */
878static ssize_t aem_show_power_period(struct device *dev,
879 struct device_attribute *devattr,
880 char *buf)
881{
882 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
883 struct aem_data *a = dev_get_drvdata(dev);
884 a->update(a);
885
886 return sprintf(buf, "%lu\n", a->power_period[attr->index]);
887}
888
889/* Set power interval registers */
890static ssize_t aem_set_power_period(struct device *dev,
891 struct device_attribute *devattr,
892 const char *buf, size_t count)
893{
894 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
895 struct aem_data *a = dev_get_drvdata(dev);
896 unsigned long temp;
897 int res;
898
899 res = strict_strtoul(buf, 10, &temp);
900 if (res)
901 return res;
902
903 if (temp < AEM_MIN_POWER_INTERVAL)
904 return -EINVAL;
905
906 mutex_lock(&a->lock);
907 a->power_period[attr->index] = temp;
908 mutex_unlock(&a->lock);
909
910 return count;
911}
912
913/* Discover sensors on an AEM device */
914static int aem_register_sensors(struct aem_data *data,
915 struct aem_ro_sensor_template *ro,
916 struct aem_rw_sensor_template *rw)
917{
918 struct device *dev = &data->pdev->dev;
919 struct sensor_device_attribute *sensors = data->sensors;
920 int err;
921
922 /* Set up read-only sensors */
923 while (ro->label) {
3cdb2052 924 sysfs_attr_init(&sensors->dev_attr.attr);
8808a793
DW		 925 sensors->dev_attr.attr.name = ro->label;
926 sensors->dev_attr.attr.mode = S_IRUGO;
927 sensors->dev_attr.show = ro->show;
928 sensors->index = ro->index;
929
930 err = device_create_file(dev, &sensors->dev_attr);
931 if (err) {
932 sensors->dev_attr.attr.name = NULL;
933 goto error;
934 }
935 sensors++;
936 ro++;
937 }
938
939 /* Set up read-write sensors */
940 while (rw->label) {
3cdb2052 941 sysfs_attr_init(&sensors->dev_attr.attr);
8808a793
DW		 942 sensors->dev_attr.attr.name = rw->label;
943 sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR;
944 sensors->dev_attr.show = rw->show;
945 sensors->dev_attr.store = rw->set;
946 sensors->index = rw->index;
947
948 err = device_create_file(dev, &sensors->dev_attr);
949 if (err) {
950 sensors->dev_attr.attr.name = NULL;
951 goto error;
952 }
953 sensors++;
954 rw++;
955 }
956
957 err = device_create_file(dev, &sensor_dev_attr_name.dev_attr);
958 if (err)
959 goto error;
960 err = device_create_file(dev, &sensor_dev_attr_version.dev_attr);
961 return err;
962
963error:
964 aem_remove_sensors(data);
965 return err;
966}
967
968/* sysfs support functions for AEM2 sensors */
969
970/* Display temperature use */
971static ssize_t aem2_show_temp(struct device *dev,
972 struct device_attribute *devattr,
973 char *buf)
974{
975 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
976 struct aem_data *a = dev_get_drvdata(dev);
977 a->update(a);
978
979 return sprintf(buf, "%u\n", a->temp[attr->index] * 1000);
980}
981
982/* Display power-capping registers */
983static ssize_t aem2_show_pcap_value(struct device *dev,
984 struct device_attribute *devattr,
985 char *buf)
986{
987 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
988 struct aem_data *a = dev_get_drvdata(dev);
989 a->update(a);
990
991 return sprintf(buf, "%u\n", a->pcap[attr->index] * 100000);
992}
993
994/* Remove sensors attached to an AEM device */
995static void aem_remove_sensors(struct aem_data *data)
996{
997 int i;
998
999 for (i = 0; i < AEM_NUM_SENSORS; i++) {
1000 if (!data->sensors[i].dev_attr.attr.name)
1001 continue;
1002 device_remove_file(&data->pdev->dev,
1003 &data->sensors[i].dev_attr);
1004 }
1005
1006 device_remove_file(&data->pdev->dev,
1007 &sensor_dev_attr_name.dev_attr);
1008 device_remove_file(&data->pdev->dev,
1009 &sensor_dev_attr_version.dev_attr);
1010}
1011
1012/* Sensor probe functions */
1013
1014/* Description of AEM1 sensors */
1015static struct aem_ro_sensor_template aem1_ro_sensors[] = {
1016{"energy1_input", aem_show_energy, 0},
1017{"power1_average", aem_show_power, 0},
1018{NULL, NULL, 0},
1019};
1020
1021static struct aem_rw_sensor_template aem1_rw_sensors[] = {
1022{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1023{NULL, NULL, NULL, 0},
1024};
1025
1026/* Description of AEM2 sensors */
1027static struct aem_ro_sensor_template aem2_ro_sensors[] = {
1028{"energy1_input", aem_show_energy, 0},
1029{"energy2_input", aem_show_energy, 1},
1030{"power1_average", aem_show_power, 0},
1031{"power2_average", aem_show_power, 1},
1032{"temp1_input", aem2_show_temp, 0},
1033{"temp2_input", aem2_show_temp, 1},
1034
1035{"power4_average", aem2_show_pcap_value, POWER_CAP_MAX_HOTPLUG},
1036{"power5_average", aem2_show_pcap_value, POWER_CAP_MAX},
1037{"power6_average", aem2_show_pcap_value, POWER_CAP_MIN_WARNING},
1038{"power7_average", aem2_show_pcap_value, POWER_CAP_MIN},
1039
1040{"power3_average", aem2_show_pcap_value, POWER_AUX},
1041{"power_cap", aem2_show_pcap_value, POWER_CAP},
1042{NULL, NULL, 0},
1043};
1044
1045static struct aem_rw_sensor_template aem2_rw_sensors[] = {
1046{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1047{"power2_average_interval", aem_show_power_period, aem_set_power_period, 1},
1048{NULL, NULL, NULL, 0},
1049};
1050
1051/* Set up AEM1 sensor attrs */
1052static int aem1_find_sensors(struct aem_data *data)
1053{
1054 return aem_register_sensors(data, aem1_ro_sensors, aem1_rw_sensors);
1055}
1056
1057/* Set up AEM2 sensor attrs */
1058static int aem2_find_sensors(struct aem_data *data)
1059{
1060 return aem_register_sensors(data, aem2_ro_sensors, aem2_rw_sensors);
1061}
1062
1063/* Module init/exit routines */
1064
1065static int __init aem_init(void)
1066{
1067 int res;
1068
fe2d5ffc 1069 res = driver_register(&aem_driver.driver);
8808a793 1070 if (res) {
55d705cc 1071 pr_err("Can't register aem driver\n");
8808a793
DW		 1072 return res;
1073 }
1074
1075 res = ipmi_smi_watcher_register(&driver_data.bmc_events);
1076 if (res)
1077 goto ipmi_reg_err;
1078 return 0;
1079
1080ipmi_reg_err:
fe2d5ffc 1081 driver_unregister(&aem_driver.driver);
8808a793
DW		 1082 return res;
1083
1084}
1085
1086static void __exit aem_exit(void)
1087{
1088 struct aem_data *p1, *next1;
1089
1090 ipmi_smi_watcher_unregister(&driver_data.bmc_events);
fe2d5ffc 1091 driver_unregister(&aem_driver.driver);
8808a793
DW		 1092 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
1093 aem_delete(p1);
1094}
1095
1096MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
eb93b7df 1097MODULE_DESCRIPTION("IBM AEM power/temp/energy sensor driver");
8808a793
DW		 1098MODULE_LICENSE("GPL");
1099
1100module_init(aem_init);
1101module_exit(aem_exit);
21d93c14
DW		 1102
1103MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3350-*");
1104MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3550-*");
1105MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3650-*");
1106MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3655-*");
1107MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3755-*");
1108MODULE_ALIAS("dmi:bvnIBM:*:pnIBM3850M2/x3950M2-*");
8070408b 1109MODULE_ALIAS("dmi:bvnIBM:*:pnIBMBladeHC10-*");
Linux kernel - Deliverables
This page took 0.316624 seconds and 5 git commands to generate.