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-rw-r--r--Documentation/hwmon/ibmaem37
-rw-r--r--drivers/hwmon/Kconfig14
-rw-r--r--drivers/hwmon/Makefile1
-rw-r--r--drivers/hwmon/ibmaem.c1111
4 files changed, 1163 insertions, 0 deletions
diff --git a/Documentation/hwmon/ibmaem b/Documentation/hwmon/ibmaem
new file mode 100644
index 000000000000..2fefaf582a43
--- /dev/null
+++ b/Documentation/hwmon/ibmaem
@@ -0,0 +1,37 @@
1Kernel driver ibmaem
2======================
3
4Supported systems:
5 * Any recent IBM System X server with Active Energy Manager support.
6 This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2,
7 x3950 M2, and certain HS2x/LS2x/QS2x blades. The IPMI host interface
8 driver ("ipmi-si") needs to be loaded for this driver to do anything.
9 Prefix: 'ibmaem'
10 Datasheet: Not available
11
12Author: Darrick J. Wong
13
14Description
15-----------
16
17This driver implements sensor reading support for the energy and power
18meters available on various IBM System X hardware through the BMC. All
19sensor banks will be exported as platform devices; this driver can talk
20to both v1 and v2 interfaces. This driver is completely separate from the
21older ibmpex driver.
22
23The v1 AEM interface has a simple set of features to monitor energy use.
24There is a register that displays an estimate of raw energy consumption
25since the last BMC reset, and a power sensor that returns average power
26use over a configurable interval.
27
28The v2 AEM interface is a bit more sophisticated, being able to present
29a wider range of energy and power use registers, the power cap as
30set by the AEM software, and temperature sensors.
31
32Special Features
33----------------
34
35The "power_cap" value displays the current system power cap, as set by
36the Active Energy Manager software. Setting the power cap from the host
37is not currently supported.
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 4dc76bc45c9d..00ff53348491 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -330,6 +330,20 @@ config SENSORS_CORETEMP
330 sensor inside your CPU. Supported all are all known variants 330 sensor inside your CPU. Supported all are all known variants
331 of Intel Core family. 331 of Intel Core family.
332 332
333config SENSORS_IBMAEM
334 tristate "IBM Active Energy Manager temperature/power sensors and control"
335 select IPMI_SI
336 depends on IPMI_HANDLER
337 help
338 If you say yes here you get support for the temperature and
339 power sensors and capping hardware in various IBM System X
340 servers that support Active Energy Manager. This includes
341 the x3350, x3550, x3650, x3655, x3755, x3850 M2, x3950 M2,
342 and certain HS2x/LS2x/QS2x blades.
343
344 This driver can also be built as a module. If so, the module
345 will be called ibmaem.
346
333config SENSORS_IBMPEX 347config SENSORS_IBMPEX
334 tristate "IBM PowerExecutive temperature/power sensors" 348 tristate "IBM PowerExecutive temperature/power sensors"
335 select IPMI_SI 349 select IPMI_SI
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 3bdb05a5cbd7..d098677e08de 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
41obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o 41obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
42obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o 42obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
43obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o 43obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o
44obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o
44obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o 45obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o
45obj-$(CONFIG_SENSORS_IT87) += it87.o 46obj-$(CONFIG_SENSORS_IT87) += it87.o
46obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o 47obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
new file mode 100644
index 000000000000..5c006c9a4311
--- /dev/null
+++ b/drivers/hwmon/ibmaem.c
@@ -0,0 +1,1111 @@
1/*
2 * A hwmon driver for the IBM Active Energy Manager temperature/power sensors
3 * and capping functionality.
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>
32#include <linux/sched.h>
33#include <linux/platform_device.h>
34#include <linux/math64.h>
35#include <linux/time.h>
36
37#define REFRESH_INTERVAL (HZ)
38#define IPMI_TIMEOUT (30 * HZ)
39#define DRVNAME "aem"
40
41#define AEM_NETFN 0x2E
42
43#define AEM_FIND_FW_CMD 0x80
44#define AEM_ELEMENT_CMD 0x81
45#define AEM_FW_INSTANCE_CMD 0x82
46
47#define AEM_READ_ELEMENT_CFG 0x80
48#define AEM_READ_BUFFER 0x81
49#define AEM_READ_REGISTER 0x82
50#define AEM_WRITE_REGISTER 0x83
51#define AEM_SET_REG_MASK 0x84
52#define AEM_CLEAR_REG_MASK 0x85
53#define AEM_READ_ELEMENT_CFG2 0x86
54
55#define AEM_CONTROL_ELEMENT 0
56#define AEM_ENERGY_ELEMENT 1
57#define AEM_CLOCK_ELEMENT 4
58#define AEM_POWER_CAP_ELEMENT 7
59#define AEM_EXHAUST_ELEMENT 9
60#define AEM_POWER_ELEMENT 10
61
62#define AEM_MODULE_TYPE_ID 0x0001
63
64#define AEM2_NUM_ENERGY_REGS 2
65#define AEM2_NUM_PCAP_REGS 6
66#define AEM2_NUM_TEMP_REGS 2
67#define AEM2_NUM_SENSORS 14
68
69#define AEM1_NUM_ENERGY_REGS 1
70#define AEM1_NUM_SENSORS 3
71
72/* AEM 2.x has more energy registers */
73#define AEM_NUM_ENERGY_REGS AEM2_NUM_ENERGY_REGS
74/* AEM 2.x needs more sensor files */
75#define AEM_NUM_SENSORS AEM2_NUM_SENSORS
76
77#define POWER_CAP 0
78#define POWER_CAP_MAX_HOTPLUG 1
79#define POWER_CAP_MAX 2
80#define POWER_CAP_MIN_WARNING 3
81#define POWER_CAP_MIN 4
82#define POWER_AUX 5
83
84#define AEM_DEFAULT_POWER_INTERVAL 1000
85#define AEM_MIN_POWER_INTERVAL 200
86#define UJ_PER_MJ 1000L
87
88static DEFINE_IDR(aem_idr);
89static DEFINE_SPINLOCK(aem_idr_lock);
90
91static struct device_driver aem_driver = {
92 .name = DRVNAME,
93 .bus = &platform_bus_type,
94};
95
96struct aem_ipmi_data {
97 struct completion read_complete;
98 struct ipmi_addr address;
99 ipmi_user_t user;
100 int interface;
101
102 struct kernel_ipmi_msg tx_message;
103 long tx_msgid;
104
105 void *rx_msg_data;
106 unsigned short rx_msg_len;
107 unsigned char rx_result;
108 int rx_recv_type;
109
110 struct device *bmc_device;
111};
112
113struct aem_ro_sensor_template {
114 char *label;
115 ssize_t (*show)(struct device *dev,
116 struct device_attribute *devattr,
117 char *buf);
118 int index;
119};
120
121struct aem_rw_sensor_template {
122 char *label;
123 ssize_t (*show)(struct device *dev,
124 struct device_attribute *devattr,
125 char *buf);
126 ssize_t (*set)(struct device *dev,
127 struct device_attribute *devattr,
128 const char *buf, size_t count);
129 int index;
130};
131
132struct aem_data {
133 struct list_head list;
134
135 struct device *hwmon_dev;
136 struct platform_device *pdev;
137 struct mutex lock;
138 char valid;
139 unsigned long last_updated; /* In jiffies */
140 u8 ver_major;
141 u8 ver_minor;
142 u8 module_handle;
143 int id;
144 struct aem_ipmi_data ipmi;
145
146 /* Function to update sensors */
147 void (*update)(struct aem_data *data);
148
149 /*
150 * AEM 1.x sensors:
151 * Available sensors:
152 * Energy meter
153 * Power meter
154 *
155 * AEM 2.x sensors:
156 * Two energy meters
157 * Two power meters
158 * Two temperature sensors
159 * Six power cap registers
160 */
161
162 /* sysfs attrs */
163 struct sensor_device_attribute sensors[AEM_NUM_SENSORS];
164
165 /* energy use in mJ */
166 u64 energy[AEM_NUM_ENERGY_REGS];
167
168 /* power sampling interval in ms */
169 unsigned long power_period[AEM_NUM_ENERGY_REGS];
170
171 /* Everything past here is for AEM2 only */
172
173 /* power caps in dW */
174 u16 pcap[AEM2_NUM_PCAP_REGS];
175
176 /* exhaust temperature in C */
177 u8 temp[AEM2_NUM_TEMP_REGS];
178};
179
180/* Data structures returned by the AEM firmware */
181struct aem_iana_id {
182 u8 bytes[3];
183};
184static struct aem_iana_id system_x_id = {
185 .bytes = {0x4D, 0x4F, 0x00}
186};
187
188/* These are used to find AEM1 instances */
189struct aem_find_firmware_req {
190 struct aem_iana_id id;
191 u8 rsvd;
192 u16 index;
193 u16 module_type_id;
194} __packed;
195
196struct aem_find_firmware_resp {
197 struct aem_iana_id id;
198 u8 num_instances;
199} __packed;
200
201/* These are used to find AEM2 instances */
202struct aem_find_instance_req {
203 struct aem_iana_id id;
204 u8 instance_number;
205 u16 module_type_id;
206} __packed;
207
208struct aem_find_instance_resp {
209 struct aem_iana_id id;
210 u8 num_instances;
211 u8 major;
212 u8 minor;
213 u8 module_handle;
214 u16 record_id;
215} __packed;
216
217/* These are used to query sensors */
218struct aem_read_sensor_req {
219 struct aem_iana_id id;
220 u8 module_handle;
221 u8 element;
222 u8 subcommand;
223 u8 reg;
224 u8 rx_buf_size;
225} __packed;
226
227struct aem_read_sensor_resp {
228 struct aem_iana_id id;
229 u8 bytes[0];
230} __packed;
231
232/* Data structures to talk to the IPMI layer */
233struct aem_driver_data {
234 struct list_head aem_devices;
235 struct ipmi_smi_watcher bmc_events;
236 struct ipmi_user_hndl ipmi_hndlrs;
237};
238
239static void aem_register_bmc(int iface, struct device *dev);
240static void aem_bmc_gone(int iface);
241static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
242
243static void aem_remove_sensors(struct aem_data *data);
244static int aem_init_aem1(struct aem_ipmi_data *probe);
245static int aem_init_aem2(struct aem_ipmi_data *probe);
246static int aem1_find_sensors(struct aem_data *data);
247static int aem2_find_sensors(struct aem_data *data);
248static void update_aem1_sensors(struct aem_data *data);
249static void update_aem2_sensors(struct aem_data *data);
250
251static struct aem_driver_data driver_data = {
252 .aem_devices = LIST_HEAD_INIT(driver_data.aem_devices),
253 .bmc_events = {
254 .owner = THIS_MODULE,
255 .new_smi = aem_register_bmc,
256 .smi_gone = aem_bmc_gone,
257 },
258 .ipmi_hndlrs = {
259 .ipmi_recv_hndl = aem_msg_handler,
260 },
261};
262
263/* Functions to talk to the IPMI layer */
264
265/* Initialize IPMI address, message buffers and user data */
266static int aem_init_ipmi_data(struct aem_ipmi_data *data, int iface,
267 struct device *bmc)
268{
269 int err;
270
271 init_completion(&data->read_complete);
272 data->bmc_device = bmc;
273
274 /* Initialize IPMI address */
275 data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
276 data->address.channel = IPMI_BMC_CHANNEL;
277 data->address.data[0] = 0;
278 data->interface = iface;
279
280 /* Initialize message buffers */
281 data->tx_msgid = 0;
282 data->tx_message.netfn = AEM_NETFN;
283
284 /* Create IPMI messaging interface user */
285 err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs,
286 data, &data->user);
287 if (err < 0) {
288 dev_err(bmc, "Unable to register user with IPMI "
289 "interface %d\n", data->interface);
290 return -EACCES;
291 }
292
293 return 0;
294}
295
296/* Send an IPMI command */
297static int aem_send_message(struct aem_ipmi_data *data)
298{
299 int err;
300
301 err = ipmi_validate_addr(&data->address, sizeof(data->address));
302 if (err)
303 goto out;
304
305 data->tx_msgid++;
306 err = ipmi_request_settime(data->user, &data->address, data->tx_msgid,
307 &data->tx_message, data, 0, 0, 0);
308 if (err)
309 goto out1;
310
311 return 0;
312out1:
313 dev_err(data->bmc_device, "request_settime=%x\n", err);
314 return err;
315out:
316 dev_err(data->bmc_device, "validate_addr=%x\n", err);
317 return err;
318}
319
320/* Dispatch IPMI messages to callers */
321static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
322{
323 unsigned short rx_len;
324 struct aem_ipmi_data *data = user_msg_data;
325
326 if (msg->msgid != data->tx_msgid) {
327 dev_err(data->bmc_device, "Mismatch between received msgid "
328 "(%02x) and transmitted msgid (%02x)!\n",
329 (int)msg->msgid,
330 (int)data->tx_msgid);
331 ipmi_free_recv_msg(msg);
332 return;
333 }
334
335 data->rx_recv_type = msg->recv_type;
336 if (msg->msg.data_len > 0)
337 data->rx_result = msg->msg.data[0];
338 else
339 data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE;
340
341 if (msg->msg.data_len > 1) {
342 rx_len = msg->msg.data_len - 1;
343 if (data->rx_msg_len < rx_len)
344 rx_len = data->rx_msg_len;
345 data->rx_msg_len = rx_len;
346 memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len);
347 } else
348 data->rx_msg_len = 0;
349
350 ipmi_free_recv_msg(msg);
351 complete(&data->read_complete);
352}
353
354/* ID functions */
355
356/* Obtain an id */
357static int aem_idr_get(int *id)
358{
359 int i, err;
360
361again:
362 if (unlikely(!idr_pre_get(&aem_idr, GFP_KERNEL)))
363 return -ENOMEM;
364
365 spin_lock(&aem_idr_lock);
366 err = idr_get_new(&aem_idr, NULL, &i);
367 spin_unlock(&aem_idr_lock);
368
369 if (unlikely(err == -EAGAIN))
370 goto again;
371 else if (unlikely(err))
372 return err;
373
374 *id = i & MAX_ID_MASK;
375 return 0;
376}
377
378/* Release an object ID */
379static void aem_idr_put(int id)
380{
381 spin_lock(&aem_idr_lock);
382 idr_remove(&aem_idr, id);
383 spin_unlock(&aem_idr_lock);
384}
385
386/* Sensor support functions */
387
388/* Read a sensor value */
389static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
390 void *buf, size_t size)
391{
392 int rs_size, res;
393 struct aem_read_sensor_req rs_req;
394 struct aem_read_sensor_resp *rs_resp;
395 struct aem_ipmi_data *ipmi = &data->ipmi;
396
397 /* AEM registers are 1, 2, 4 or 8 bytes */
398 switch (size) {
399 case 1:
400 case 2:
401 case 4:
402 case 8:
403 break;
404 default:
405 return -EINVAL;
406 }
407
408 rs_req.id = system_x_id;
409 rs_req.module_handle = data->module_handle;
410 rs_req.element = elt;
411 rs_req.subcommand = AEM_READ_REGISTER;
412 rs_req.reg = reg;
413 rs_req.rx_buf_size = size;
414
415 ipmi->tx_message.cmd = AEM_ELEMENT_CMD;
416 ipmi->tx_message.data = (char *)&rs_req;
417 ipmi->tx_message.data_len = sizeof(rs_req);
418
419 rs_size = sizeof(*rs_resp) + size;
420 rs_resp = kzalloc(rs_size, GFP_KERNEL);
421 if (!rs_resp)
422 return -ENOMEM;
423
424 ipmi->rx_msg_data = rs_resp;
425 ipmi->rx_msg_len = rs_size;
426
427 aem_send_message(ipmi);
428
429 res = wait_for_completion_timeout(&ipmi->read_complete, IPMI_TIMEOUT);
430 if (!res)
431 return -ETIMEDOUT;
432
433 if (ipmi->rx_result || ipmi->rx_msg_len != rs_size ||
434 memcmp(&rs_resp->id, &system_x_id, sizeof(system_x_id))) {
435 kfree(rs_resp);
436 return -ENOENT;
437 }
438
439 switch (size) {
440 case 1: {
441 u8 *x = buf;
442 *x = rs_resp->bytes[0];
443 break;
444 }
445 case 2: {
446 u16 *x = buf;
447 *x = be16_to_cpup((u16 *)rs_resp->bytes);
448 break;
449 }
450 case 4: {
451 u32 *x = buf;
452 *x = be32_to_cpup((u32 *)rs_resp->bytes);
453 break;
454 }
455 case 8: {
456 u64 *x = buf;
457 *x = be64_to_cpup((u64 *)rs_resp->bytes);
458 break;
459 }
460 }
461
462 return 0;
463}
464
465/* Update AEM energy registers */
466static void update_aem_energy(struct aem_data *data)
467{
468 aem_read_sensor(data, AEM_ENERGY_ELEMENT, 0, &data->energy[0], 8);
469 if (data->ver_major < 2)
470 return;
471 aem_read_sensor(data, AEM_ENERGY_ELEMENT, 1, &data->energy[1], 8);
472}
473
474/* Update all AEM1 sensors */
475static void update_aem1_sensors(struct aem_data *data)
476{
477 mutex_lock(&data->lock);
478 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
479 data->valid)
480 goto out;
481
482 update_aem_energy(data);
483out:
484 mutex_unlock(&data->lock);
485}
486
487/* Update all AEM2 sensors */
488static void update_aem2_sensors(struct aem_data *data)
489{
490 int i;
491
492 mutex_lock(&data->lock);
493 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
494 data->valid)
495 goto out;
496
497 update_aem_energy(data);
498 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 0, &data->temp[0], 1);
499 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 1, &data->temp[1], 1);
500
501 for (i = POWER_CAP; i <= POWER_AUX; i++)
502 aem_read_sensor(data, AEM_POWER_CAP_ELEMENT, i,
503 &data->pcap[i], 2);
504out:
505 mutex_unlock(&data->lock);
506}
507
508/* Delete an AEM instance */
509static void aem_delete(struct aem_data *data)
510{
511 list_del(&data->list);
512 aem_remove_sensors(data);
513 hwmon_device_unregister(data->hwmon_dev);
514 ipmi_destroy_user(data->ipmi.user);
515 dev_set_drvdata(&data->pdev->dev, NULL);
516 platform_device_unregister(data->pdev);
517 aem_idr_put(data->id);
518 kfree(data);
519}
520
521/* Probe functions for AEM1 devices */
522
523/* Retrieve version and module handle for an AEM1 instance */
524static int aem_find_aem1_count(struct aem_ipmi_data *data)
525{
526 int res;
527 struct aem_find_firmware_req ff_req;
528 struct aem_find_firmware_resp ff_resp;
529
530 ff_req.id = system_x_id;
531 ff_req.index = 0;
532 ff_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
533
534 data->tx_message.cmd = AEM_FIND_FW_CMD;
535 data->tx_message.data = (char *)&ff_req;
536 data->tx_message.data_len = sizeof(ff_req);
537
538 data->rx_msg_data = &ff_resp;
539 data->rx_msg_len = sizeof(ff_resp);
540
541 aem_send_message(data);
542
543 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
544 if (!res)
545 return -ETIMEDOUT;
546
547 if (data->rx_result || data->rx_msg_len != sizeof(ff_resp) ||
548 memcmp(&ff_resp.id, &system_x_id, sizeof(system_x_id)))
549 return -ENOENT;
550
551 return ff_resp.num_instances;
552}
553
554/* Find and initialize one AEM1 instance */
555static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
556{
557 struct aem_data *data;
558 int i;
559 int res = -ENOMEM;
560
561 data = kzalloc(sizeof(*data), GFP_KERNEL);
562 if (!data)
563 return res;
564 mutex_init(&data->lock);
565
566 /* Copy instance data */
567 data->ver_major = 1;
568 data->ver_minor = 0;
569 data->module_handle = module_handle;
570 for (i = 0; i < AEM1_NUM_ENERGY_REGS; i++)
571 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
572
573 /* Create sub-device for this fw instance */
574 if (aem_idr_get(&data->id))
575 goto id_err;
576
577 data->pdev = platform_device_alloc(DRVNAME, data->id);
578 if (!data->pdev)
579 goto dev_err;
580 data->pdev->dev.driver = &aem_driver;
581
582 res = platform_device_add(data->pdev);
583 if (res)
584 goto ipmi_err;
585
586 dev_set_drvdata(&data->pdev->dev, data);
587
588 /* Set up IPMI interface */
589 if (aem_init_ipmi_data(&data->ipmi, probe->interface,
590 probe->bmc_device))
591 goto ipmi_err;
592
593 /* Register with hwmon */
594 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
595
596 if (IS_ERR(data->hwmon_dev)) {
597 dev_err(&data->pdev->dev, "Unable to register hwmon "
598 "device for IPMI interface %d\n",
599 probe->interface);
600 goto hwmon_reg_err;
601 }
602
603 data->update = update_aem1_sensors;
604
605 /* Find sensors */
606 if (aem1_find_sensors(data))
607 goto sensor_err;
608
609 /* Add to our list of AEM devices */
610 list_add_tail(&data->list, &driver_data.aem_devices);
611
612 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
613 data->ver_major, data->ver_minor,
614 data->module_handle);
615 return 0;
616
617sensor_err:
618 hwmon_device_unregister(data->hwmon_dev);
619hwmon_reg_err:
620 ipmi_destroy_user(data->ipmi.user);
621ipmi_err:
622 dev_set_drvdata(&data->pdev->dev, NULL);
623 platform_device_unregister(data->pdev);
624dev_err:
625 aem_idr_put(data->id);
626id_err:
627 kfree(data);
628
629 return res;
630}
631
632/* Find and initialize all AEM1 instances */
633static int aem_init_aem1(struct aem_ipmi_data *probe)
634{
635 int num, i, err;
636
637 num = aem_find_aem1_count(probe);
638 for (i = 0; i < num; i++) {
639 err = aem_init_aem1_inst(probe, i);
640 if (err) {
641 dev_err(probe->bmc_device,
642 "Error %d initializing AEM1 0x%X\n",
643 err, i);
644 return err;
645 }
646 }
647
648 return 0;
649}
650
651/* Probe functions for AEM2 devices */
652
653/* Retrieve version and module handle for an AEM2 instance */
654static int aem_find_aem2(struct aem_ipmi_data *data,
655 struct aem_find_instance_resp *fi_resp,
656 int instance_num)
657{
658 int res;
659 struct aem_find_instance_req fi_req;
660
661 fi_req.id = system_x_id;
662 fi_req.instance_number = instance_num;
663 fi_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
664
665 data->tx_message.cmd = AEM_FW_INSTANCE_CMD;
666 data->tx_message.data = (char *)&fi_req;
667 data->tx_message.data_len = sizeof(fi_req);
668
669 data->rx_msg_data = fi_resp;
670 data->rx_msg_len = sizeof(*fi_resp);
671
672 aem_send_message(data);
673
674 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
675 if (!res)
676 return -ETIMEDOUT;
677
678 if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) ||
679 memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)))
680 return -ENOENT;
681
682 return 0;
683}
684
685/* Find and initialize one AEM2 instance */
686static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
687 struct aem_find_instance_resp *fi_resp)
688{
689 struct aem_data *data;
690 int i;
691 int res = -ENOMEM;
692
693 data = kzalloc(sizeof(*data), GFP_KERNEL);
694 if (!data)
695 return res;
696 mutex_init(&data->lock);
697
698 /* Copy instance data */
699 data->ver_major = fi_resp->major;
700 data->ver_minor = fi_resp->minor;
701 data->module_handle = fi_resp->module_handle;
702 for (i = 0; i < AEM2_NUM_ENERGY_REGS; i++)
703 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
704
705 /* Create sub-device for this fw instance */
706 if (aem_idr_get(&data->id))
707 goto id_err;
708
709 data->pdev = platform_device_alloc(DRVNAME, data->id);
710 if (!data->pdev)
711 goto dev_err;
712 data->pdev->dev.driver = &aem_driver;
713
714 res = platform_device_add(data->pdev);
715 if (res)
716 goto ipmi_err;
717
718 dev_set_drvdata(&data->pdev->dev, data);
719
720 /* Set up IPMI interface */
721 if (aem_init_ipmi_data(&data->ipmi, probe->interface,
722 probe->bmc_device))
723 goto ipmi_err;
724
725 /* Register with hwmon */
726 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
727
728 if (IS_ERR(data->hwmon_dev)) {
729 dev_err(&data->pdev->dev, "Unable to register hwmon "
730 "device for IPMI interface %d\n",
731 probe->interface);
732 goto hwmon_reg_err;
733 }
734
735 data->update = update_aem2_sensors;
736
737 /* Find sensors */
738 if (aem2_find_sensors(data))
739 goto sensor_err;
740
741 /* Add to our list of AEM devices */
742 list_add_tail(&data->list, &driver_data.aem_devices);
743
744 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
745 data->ver_major, data->ver_minor,
746 data->module_handle);
747 return 0;
748
749sensor_err:
750 hwmon_device_unregister(data->hwmon_dev);
751hwmon_reg_err:
752 ipmi_destroy_user(data->ipmi.user);
753ipmi_err:
754 dev_set_drvdata(&data->pdev->dev, NULL);
755 platform_device_unregister(data->pdev);
756dev_err:
757 aem_idr_put(data->id);
758id_err:
759 kfree(data);
760
761 return res;
762}
763
764/* Find and initialize all AEM2 instances */
765static int aem_init_aem2(struct aem_ipmi_data *probe)
766{
767 struct aem_find_instance_resp fi_resp;
768 int err;
769 int i = 0;
770
771 while (!aem_find_aem2(probe, &fi_resp, i)) {
772 if (fi_resp.major != 2) {
773 dev_err(probe->bmc_device, "Unknown AEM v%d; please "
774 "report this to the maintainer.\n",
775 fi_resp.major);
776 i++;
777 continue;
778 }
779 err = aem_init_aem2_inst(probe, &fi_resp);
780 if (err) {
781 dev_err(probe->bmc_device,
782 "Error %d initializing AEM2 0x%X\n",
783 err, fi_resp.module_handle);
784 return err;
785 }
786 i++;
787 }
788
789 return 0;
790}
791
792/* Probe a BMC for AEM firmware instances */
793static void aem_register_bmc(int iface, struct device *dev)
794{
795 struct aem_ipmi_data probe;
796
797 if (aem_init_ipmi_data(&probe, iface, dev))
798 return;
799
800 /* Ignore probe errors; they won't cause problems */
801 aem_init_aem1(&probe);
802 aem_init_aem2(&probe);
803
804 ipmi_destroy_user(probe.user);
805}
806
807/* Handle BMC deletion */
808static void aem_bmc_gone(int iface)
809{
810 struct aem_data *p1, *next1;
811
812 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
813 if (p1->ipmi.interface == iface)
814 aem_delete(p1);
815}
816
817/* sysfs support functions */
818
819/* AEM device name */
820static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
821 char *buf)
822{
823 struct aem_data *data = dev_get_drvdata(dev);
824
825 return sprintf(buf, "%s%d\n", DRVNAME, data->ver_major);
826}
827static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
828
829/* AEM device version */
830static ssize_t show_version(struct device *dev,
831 struct device_attribute *devattr,
832 char *buf)
833{
834 struct aem_data *data = dev_get_drvdata(dev);
835
836 return sprintf(buf, "%d.%d\n", data->ver_major, data->ver_minor);
837}
838static SENSOR_DEVICE_ATTR(version, S_IRUGO, show_version, NULL, 0);
839
840/* Display power use */
841static ssize_t aem_show_power(struct device *dev,
842 struct device_attribute *devattr,
843 char *buf)
844{
845 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
846 struct aem_data *data = dev_get_drvdata(dev);
847 u64 before, after, delta, time;
848 signed long leftover;
849 struct timespec b, a;
850
851 mutex_lock(&data->lock);
852 update_aem_energy(data);
853 getnstimeofday(&b);
854 before = data->energy[attr->index];
855
856 leftover = schedule_timeout_interruptible(
857 msecs_to_jiffies(data->power_period[attr->index])
858 );
859 if (leftover) {
860 mutex_unlock(&data->lock);
861 return 0;
862 }
863
864 update_aem_energy(data);
865 getnstimeofday(&a);
866 after = data->energy[attr->index];
867 mutex_unlock(&data->lock);
868
869 time = timespec_to_ns(&a) - timespec_to_ns(&b);
870 delta = (after - before) * UJ_PER_MJ;
871
872 return sprintf(buf, "%llu\n",
873 (unsigned long long)div64_u64(delta * NSEC_PER_SEC, time));
874}
875
876/* Display energy use */
877static ssize_t aem_show_energy(struct device *dev,
878 struct device_attribute *devattr,
879 char *buf)
880{
881 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
882 struct aem_data *a = dev_get_drvdata(dev);
883 a->update(a);
884
885 return sprintf(buf, "%llu\n",
886 (unsigned long long)a->energy[attr->index] * 1000);
887}
888
889/* Display power interval registers */
890static ssize_t aem_show_power_period(struct device *dev,
891 struct device_attribute *devattr,
892 char *buf)
893{
894 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
895 struct aem_data *a = dev_get_drvdata(dev);
896 a->update(a);
897
898 return sprintf(buf, "%lu\n", a->power_period[attr->index]);
899}
900
901/* Set power interval registers */
902static ssize_t aem_set_power_period(struct device *dev,
903 struct device_attribute *devattr,
904 const char *buf, size_t count)
905{
906 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
907 struct aem_data *a = dev_get_drvdata(dev);
908 unsigned long temp;
909 int res;
910
911 res = strict_strtoul(buf, 10, &temp);
912 if (res)
913 return res;
914
915 if (temp < AEM_MIN_POWER_INTERVAL)
916 return -EINVAL;
917
918 mutex_lock(&a->lock);
919 a->power_period[attr->index] = temp;
920 mutex_unlock(&a->lock);
921
922 return count;
923}
924
925/* Discover sensors on an AEM device */
926static int aem_register_sensors(struct aem_data *data,
927 struct aem_ro_sensor_template *ro,
928 struct aem_rw_sensor_template *rw)
929{
930 struct device *dev = &data->pdev->dev;
931 struct sensor_device_attribute *sensors = data->sensors;
932 int err;
933
934 /* Set up read-only sensors */
935 while (ro->label) {
936 sensors->dev_attr.attr.name = ro->label;
937 sensors->dev_attr.attr.mode = S_IRUGO;
938 sensors->dev_attr.show = ro->show;
939 sensors->index = ro->index;
940
941 err = device_create_file(dev, &sensors->dev_attr);
942 if (err) {
943 sensors->dev_attr.attr.name = NULL;
944 goto error;
945 }
946 sensors++;
947 ro++;
948 }
949
950 /* Set up read-write sensors */
951 while (rw->label) {
952 sensors->dev_attr.attr.name = rw->label;
953 sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR;
954 sensors->dev_attr.show = rw->show;
955 sensors->dev_attr.store = rw->set;
956 sensors->index = rw->index;
957
958 err = device_create_file(dev, &sensors->dev_attr);
959 if (err) {
960 sensors->dev_attr.attr.name = NULL;
961 goto error;
962 }
963 sensors++;
964 rw++;
965 }
966
967 err = device_create_file(dev, &sensor_dev_attr_name.dev_attr);
968 if (err)
969 goto error;
970 err = device_create_file(dev, &sensor_dev_attr_version.dev_attr);
971 return err;
972
973error:
974 aem_remove_sensors(data);
975 return err;
976}
977
978/* sysfs support functions for AEM2 sensors */
979
980/* Display temperature use */
981static ssize_t aem2_show_temp(struct device *dev,
982 struct device_attribute *devattr,
983 char *buf)
984{
985 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
986 struct aem_data *a = dev_get_drvdata(dev);
987 a->update(a);
988
989 return sprintf(buf, "%u\n", a->temp[attr->index] * 1000);
990}
991
992/* Display power-capping registers */
993static ssize_t aem2_show_pcap_value(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->pcap[attr->index] * 100000);
1002}
1003
1004/* Remove sensors attached to an AEM device */
1005static void aem_remove_sensors(struct aem_data *data)
1006{
1007 int i;
1008
1009 for (i = 0; i < AEM_NUM_SENSORS; i++) {
1010 if (!data->sensors[i].dev_attr.attr.name)
1011 continue;
1012 device_remove_file(&data->pdev->dev,
1013 &data->sensors[i].dev_attr);
1014 }
1015
1016 device_remove_file(&data->pdev->dev,
1017 &sensor_dev_attr_name.dev_attr);
1018 device_remove_file(&data->pdev->dev,
1019 &sensor_dev_attr_version.dev_attr);
1020}
1021
1022/* Sensor probe functions */
1023
1024/* Description of AEM1 sensors */
1025static struct aem_ro_sensor_template aem1_ro_sensors[] = {
1026{"energy1_input", aem_show_energy, 0},
1027{"power1_average", aem_show_power, 0},
1028{NULL, NULL, 0},
1029};
1030
1031static struct aem_rw_sensor_template aem1_rw_sensors[] = {
1032{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1033{NULL, NULL, NULL, 0},
1034};
1035
1036/* Description of AEM2 sensors */
1037static struct aem_ro_sensor_template aem2_ro_sensors[] = {
1038{"energy1_input", aem_show_energy, 0},
1039{"energy2_input", aem_show_energy, 1},
1040{"power1_average", aem_show_power, 0},
1041{"power2_average", aem_show_power, 1},
1042{"temp1_input", aem2_show_temp, 0},
1043{"temp2_input", aem2_show_temp, 1},
1044
1045{"power4_average", aem2_show_pcap_value, POWER_CAP_MAX_HOTPLUG},
1046{"power5_average", aem2_show_pcap_value, POWER_CAP_MAX},
1047{"power6_average", aem2_show_pcap_value, POWER_CAP_MIN_WARNING},
1048{"power7_average", aem2_show_pcap_value, POWER_CAP_MIN},
1049
1050{"power3_average", aem2_show_pcap_value, POWER_AUX},
1051{"power_cap", aem2_show_pcap_value, POWER_CAP},
1052{NULL, NULL, 0},
1053};
1054
1055static struct aem_rw_sensor_template aem2_rw_sensors[] = {
1056{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1057{"power2_average_interval", aem_show_power_period, aem_set_power_period, 1},
1058{NULL, NULL, NULL, 0},
1059};
1060
1061/* Set up AEM1 sensor attrs */
1062static int aem1_find_sensors(struct aem_data *data)
1063{
1064 return aem_register_sensors(data, aem1_ro_sensors, aem1_rw_sensors);
1065}
1066
1067/* Set up AEM2 sensor attrs */
1068static int aem2_find_sensors(struct aem_data *data)
1069{
1070 return aem_register_sensors(data, aem2_ro_sensors, aem2_rw_sensors);
1071}
1072
1073/* Module init/exit routines */
1074
1075static int __init aem_init(void)
1076{
1077 int res;
1078
1079 res = driver_register(&aem_driver);
1080 if (res) {
1081 printk(KERN_ERR "Can't register aem driver\n");
1082 return res;
1083 }
1084
1085 res = ipmi_smi_watcher_register(&driver_data.bmc_events);
1086 if (res)
1087 goto ipmi_reg_err;
1088 return 0;
1089
1090ipmi_reg_err:
1091 driver_unregister(&aem_driver);
1092 return res;
1093
1094}
1095
1096static void __exit aem_exit(void)
1097{
1098 struct aem_data *p1, *next1;
1099
1100 ipmi_smi_watcher_unregister(&driver_data.bmc_events);
1101 driver_unregister(&aem_driver);
1102 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
1103 aem_delete(p1);
1104}
1105
1106MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1107MODULE_DESCRIPTION("IBM Active Energy Manager power/temp sensor driver");
1108MODULE_LICENSE("GPL");
1109
1110module_init(aem_init);
1111module_exit(aem_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-21 14:44:23 -0500