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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * A hwmon driver for the IBM System Director Active Energy Manager (AEM)
4 * temperature/power/energy sensors and capping functionality.
5 * Copyright (C) 2008 IBM
6 *
7 * Author: Darrick J. Wong <darrick.wong@oracle.com>
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/ipmi.h>
13#include <linux/module.h>
14#include <linux/hwmon.h>
15#include <linux/hwmon-sysfs.h>
16#include <linux/jiffies.h>
17#include <linux/mutex.h>
18#include <linux/kdev_t.h>
19#include <linux/spinlock.h>
20#include <linux/idr.h>
21#include <linux/slab.h>
22#include <linux/sched.h>
23#include <linux/platform_device.h>
24#include <linux/math64.h>
25#include <linux/time.h>
26#include <linux/err.h>
27
28#define REFRESH_INTERVAL (HZ)
29#define IPMI_TIMEOUT (30 * HZ)
30#define DRVNAME "aem"
31
32#define AEM_NETFN 0x2E
33
34#define AEM_FIND_FW_CMD 0x80
35#define AEM_ELEMENT_CMD 0x81
36#define AEM_FW_INSTANCE_CMD 0x82
37
38#define AEM_READ_ELEMENT_CFG 0x80
39#define AEM_READ_BUFFER 0x81
40#define AEM_READ_REGISTER 0x82
41#define AEM_WRITE_REGISTER 0x83
42#define AEM_SET_REG_MASK 0x84
43#define AEM_CLEAR_REG_MASK 0x85
44#define AEM_READ_ELEMENT_CFG2 0x86
45
46#define AEM_CONTROL_ELEMENT 0
47#define AEM_ENERGY_ELEMENT 1
48#define AEM_CLOCK_ELEMENT 4
49#define AEM_POWER_CAP_ELEMENT 7
50#define AEM_EXHAUST_ELEMENT 9
51#define AEM_POWER_ELEMENT 10
52
53#define AEM_MODULE_TYPE_ID 0x0001
54
55#define AEM2_NUM_ENERGY_REGS 2
56#define AEM2_NUM_PCAP_REGS 6
57#define AEM2_NUM_TEMP_REGS 2
58#define AEM2_NUM_SENSORS 14
59
60#define AEM1_NUM_ENERGY_REGS 1
61#define AEM1_NUM_SENSORS 3
62
63/* AEM 2.x has more energy registers */
64#define AEM_NUM_ENERGY_REGS AEM2_NUM_ENERGY_REGS
65/* AEM 2.x needs more sensor files */
66#define AEM_NUM_SENSORS AEM2_NUM_SENSORS
67
68#define POWER_CAP 0
69#define POWER_CAP_MAX_HOTPLUG 1
70#define POWER_CAP_MAX 2
71#define POWER_CAP_MIN_WARNING 3
72#define POWER_CAP_MIN 4
73#define POWER_AUX 5
74
75#define AEM_DEFAULT_POWER_INTERVAL 1000
76#define AEM_MIN_POWER_INTERVAL 200
77#define UJ_PER_MJ 1000L
78
79static DEFINE_IDA(aem_ida);
80
81static struct platform_driver aem_driver = {
82 .driver = {
83 .name = DRVNAME,
84 .bus = &platform_bus_type,
85 }
86};
87
88struct aem_ipmi_data {
89 struct completion read_complete;
90 struct ipmi_addr address;
91 struct ipmi_user *user;
92 int interface;
93
94 struct kernel_ipmi_msg tx_message;
95 long tx_msgid;
96
97 void *rx_msg_data;
98 unsigned short rx_msg_len;
99 unsigned char rx_result;
100 int rx_recv_type;
101
102 struct device *bmc_device;
103};
104
105struct aem_ro_sensor_template {
106 char *label;
107 ssize_t (*show)(struct device *dev,
108 struct device_attribute *devattr,
109 char *buf);
110 int index;
111};
112
113struct aem_rw_sensor_template {
114 char *label;
115 ssize_t (*show)(struct device *dev,
116 struct device_attribute *devattr,
117 char *buf);
118 ssize_t (*set)(struct device *dev,
119 struct device_attribute *devattr,
120 const char *buf, size_t count);
121 int index;
122};
123
124struct aem_data {
125 struct list_head list;
126
127 struct device *hwmon_dev;
128 struct platform_device *pdev;
129 struct mutex lock;
130 bool valid;
131 unsigned long last_updated; /* In jiffies */
132 u8 ver_major;
133 u8 ver_minor;
134 u8 module_handle;
135 int id;
136 struct aem_ipmi_data ipmi;
137
138 /* Function and buffer to update sensors */
139 void (*update)(struct aem_data *data);
140 struct aem_read_sensor_resp *rs_resp;
141
142 /*
143 * AEM 1.x sensors:
144 * Available sensors:
145 * Energy meter
146 * Power meter
147 *
148 * AEM 2.x sensors:
149 * Two energy meters
150 * Two power meters
151 * Two temperature sensors
152 * Six power cap registers
153 */
154
155 /* sysfs attrs */
156 struct sensor_device_attribute sensors[AEM_NUM_SENSORS];
157
158 /* energy use in mJ */
159 u64 energy[AEM_NUM_ENERGY_REGS];
160
161 /* power sampling interval in ms */
162 unsigned long power_period[AEM_NUM_ENERGY_REGS];
163
164 /* Everything past here is for AEM2 only */
165
166 /* power caps in dW */
167 u16 pcap[AEM2_NUM_PCAP_REGS];
168
169 /* exhaust temperature in C */
170 u8 temp[AEM2_NUM_TEMP_REGS];
171};
172
173/* Data structures returned by the AEM firmware */
174struct aem_iana_id {
175 u8 bytes[3];
176};
177static struct aem_iana_id system_x_id = {
178 .bytes = {0x4D, 0x4F, 0x00}
179};
180
181/* These are used to find AEM1 instances */
182struct aem_find_firmware_req {
183 struct aem_iana_id id;
184 u8 rsvd;
185 __be16 index;
186 __be16 module_type_id;
187} __packed;
188
189struct aem_find_firmware_resp {
190 struct aem_iana_id id;
191 u8 num_instances;
192} __packed;
193
194/* These are used to find AEM2 instances */
195struct aem_find_instance_req {
196 struct aem_iana_id id;
197 u8 instance_number;
198 __be16 module_type_id;
199} __packed;
200
201struct aem_find_instance_resp {
202 struct aem_iana_id id;
203 u8 num_instances;
204 u8 major;
205 u8 minor;
206 u8 module_handle;
207 u16 record_id;
208} __packed;
209
210/* These are used to query sensors */
211struct aem_read_sensor_req {
212 struct aem_iana_id id;
213 u8 module_handle;
214 u8 element;
215 u8 subcommand;
216 u8 reg;
217 u8 rx_buf_size;
218} __packed;
219
220struct aem_read_sensor_resp {
221 struct aem_iana_id id;
222 u8 bytes[];
223} __packed;
224
225/* Data structures to talk to the IPMI layer */
226struct aem_driver_data {
227 struct list_head aem_devices;
228 struct ipmi_smi_watcher bmc_events;
229 struct ipmi_user_hndl ipmi_hndlrs;
230};
231
232static void aem_register_bmc(int iface, struct device *dev);
233static void aem_bmc_gone(int iface);
234static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
235
236static void aem_remove_sensors(struct aem_data *data);
237static int aem1_find_sensors(struct aem_data *data);
238static int aem2_find_sensors(struct aem_data *data);
239static void update_aem1_sensors(struct aem_data *data);
240static void update_aem2_sensors(struct aem_data *data);
241
242static struct aem_driver_data driver_data = {
243 .aem_devices = LIST_HEAD_INIT(driver_data.aem_devices),
244 .bmc_events = {
245 .owner = THIS_MODULE,
246 .new_smi = aem_register_bmc,
247 .smi_gone = aem_bmc_gone,
248 },
249 .ipmi_hndlrs = {
250 .ipmi_recv_hndl = aem_msg_handler,
251 },
252};
253
254/* Functions to talk to the IPMI layer */
255
256/* Initialize IPMI address, message buffers and user data */
257static int aem_init_ipmi_data(struct aem_ipmi_data *data, int iface,
258 struct device *bmc)
259{
260 int err;
261
262 init_completion(&data->read_complete);
263 data->bmc_device = bmc;
264
265 /* Initialize IPMI address */
266 data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
267 data->address.channel = IPMI_BMC_CHANNEL;
268 data->address.data[0] = 0;
269 data->interface = iface;
270
271 /* Initialize message buffers */
272 data->tx_msgid = 0;
273 data->tx_message.netfn = AEM_NETFN;
274
275 /* Create IPMI messaging interface user */
276 err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs,
277 data, &data->user);
278 if (err < 0) {
279 dev_err(bmc,
280 "Unable to register user with IPMI interface %d\n",
281 data->interface);
282 return err;
283 }
284
285 return 0;
286}
287
288/* Send an IPMI command */
289static int aem_send_message(struct aem_ipmi_data *data)
290{
291 int err;
292
293 err = ipmi_validate_addr(&data->address, sizeof(data->address));
294 if (err)
295 goto out;
296
297 data->tx_msgid++;
298 err = ipmi_request_settime(data->user, &data->address, data->tx_msgid,
299 &data->tx_message, data, 0, 0, 0);
300 if (err)
301 goto out1;
302
303 return 0;
304out1:
305 dev_err(data->bmc_device, "request_settime=%x\n", err);
306 return err;
307out:
308 dev_err(data->bmc_device, "validate_addr=%x\n", err);
309 return err;
310}
311
312/* Dispatch IPMI messages to callers */
313static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
314{
315 unsigned short rx_len;
316 struct aem_ipmi_data *data = user_msg_data;
317
318 if (msg->msgid != data->tx_msgid) {
319 dev_err(data->bmc_device,
320 "Mismatch between received msgid (%02x) and transmitted msgid (%02x)!\n",
321 (int)msg->msgid,
322 (int)data->tx_msgid);
323 ipmi_free_recv_msg(msg);
324 return;
325 }
326
327 data->rx_recv_type = msg->recv_type;
328 if (msg->msg.data_len > 0)
329 data->rx_result = msg->msg.data[0];
330 else
331 data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE;
332
333 if (msg->msg.data_len > 1) {
334 rx_len = msg->msg.data_len - 1;
335 if (data->rx_msg_len < rx_len)
336 rx_len = data->rx_msg_len;
337 data->rx_msg_len = rx_len;
338 memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len);
339 } else
340 data->rx_msg_len = 0;
341
342 ipmi_free_recv_msg(msg);
343 complete(&data->read_complete);
344}
345
346/* Sensor support functions */
347
348/* Read a sensor value; must be called with data->lock held */
349static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
350 void *buf, size_t size)
351{
352 int rs_size, res;
353 struct aem_read_sensor_req rs_req;
354 /* Use preallocated rx buffer */
355 struct aem_read_sensor_resp *rs_resp = data->rs_resp;
356 struct aem_ipmi_data *ipmi = &data->ipmi;
357
358 /* AEM registers are 1, 2, 4 or 8 bytes */
359 switch (size) {
360 case 1:
361 case 2:
362 case 4:
363 case 8:
364 break;
365 default:
366 return -EINVAL;
367 }
368
369 rs_req.id = system_x_id;
370 rs_req.module_handle = data->module_handle;
371 rs_req.element = elt;
372 rs_req.subcommand = AEM_READ_REGISTER;
373 rs_req.reg = reg;
374 rs_req.rx_buf_size = size;
375
376 ipmi->tx_message.cmd = AEM_ELEMENT_CMD;
377 ipmi->tx_message.data = (char *)&rs_req;
378 ipmi->tx_message.data_len = sizeof(rs_req);
379
380 rs_size = sizeof(*rs_resp) + size;
381 ipmi->rx_msg_data = rs_resp;
382 ipmi->rx_msg_len = rs_size;
383
384 aem_send_message(ipmi);
385
386 res = wait_for_completion_timeout(&ipmi->read_complete, IPMI_TIMEOUT);
387 if (!res) {
388 res = -ETIMEDOUT;
389 goto out;
390 }
391
392 if (ipmi->rx_result || ipmi->rx_msg_len != rs_size ||
393 memcmp(&rs_resp->id, &system_x_id, sizeof(system_x_id))) {
394 res = -ENOENT;
395 goto out;
396 }
397
398 switch (size) {
399 case 1: {
400 u8 *x = buf;
401 *x = rs_resp->bytes[0];
402 break;
403 }
404 case 2: {
405 u16 *x = buf;
406 *x = be16_to_cpup((__be16 *)rs_resp->bytes);
407 break;
408 }
409 case 4: {
410 u32 *x = buf;
411 *x = be32_to_cpup((__be32 *)rs_resp->bytes);
412 break;
413 }
414 case 8: {
415 u64 *x = buf;
416 *x = be64_to_cpup((__be64 *)rs_resp->bytes);
417 break;
418 }
419 }
420 res = 0;
421
422out:
423 return res;
424}
425
426/* Update AEM energy registers */
427static void update_aem_energy_one(struct aem_data *data, int which)
428{
429 aem_read_sensor(data, AEM_ENERGY_ELEMENT, which,
430 &data->energy[which], 8);
431}
432
433static void update_aem_energy(struct aem_data *data)
434{
435 update_aem_energy_one(data, 0);
436 if (data->ver_major < 2)
437 return;
438 update_aem_energy_one(data, 1);
439}
440
441/* Update all AEM1 sensors */
442static void update_aem1_sensors(struct aem_data *data)
443{
444 mutex_lock(&data->lock);
445 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
446 data->valid)
447 goto out;
448
449 update_aem_energy(data);
450out:
451 mutex_unlock(&data->lock);
452}
453
454/* Update all AEM2 sensors */
455static void update_aem2_sensors(struct aem_data *data)
456{
457 int i;
458
459 mutex_lock(&data->lock);
460 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
461 data->valid)
462 goto out;
463
464 update_aem_energy(data);
465 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 0, &data->temp[0], 1);
466 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 1, &data->temp[1], 1);
467
468 for (i = POWER_CAP; i <= POWER_AUX; i++)
469 aem_read_sensor(data, AEM_POWER_CAP_ELEMENT, i,
470 &data->pcap[i], 2);
471out:
472 mutex_unlock(&data->lock);
473}
474
475/* Delete an AEM instance */
476static void aem_delete(struct aem_data *data)
477{
478 list_del(&data->list);
479 aem_remove_sensors(data);
480 kfree(data->rs_resp);
481 hwmon_device_unregister(data->hwmon_dev);
482 ipmi_destroy_user(data->ipmi.user);
483 platform_set_drvdata(data->pdev, NULL);
484 platform_device_unregister(data->pdev);
485 ida_free(&aem_ida, data->id);
486 kfree(data);
487}
488
489/* Probe functions for AEM1 devices */
490
491/* Retrieve version and module handle for an AEM1 instance */
492static int aem_find_aem1_count(struct aem_ipmi_data *data)
493{
494 int res;
495 struct aem_find_firmware_req ff_req;
496 struct aem_find_firmware_resp ff_resp;
497
498 ff_req.id = system_x_id;
499 ff_req.index = 0;
500 ff_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
501
502 data->tx_message.cmd = AEM_FIND_FW_CMD;
503 data->tx_message.data = (char *)&ff_req;
504 data->tx_message.data_len = sizeof(ff_req);
505
506 data->rx_msg_data = &ff_resp;
507 data->rx_msg_len = sizeof(ff_resp);
508
509 aem_send_message(data);
510
511 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
512 if (!res)
513 return -ETIMEDOUT;
514
515 if (data->rx_result || data->rx_msg_len != sizeof(ff_resp) ||
516 memcmp(&ff_resp.id, &system_x_id, sizeof(system_x_id)))
517 return -ENOENT;
518
519 return ff_resp.num_instances;
520}
521
522/* Find and initialize one AEM1 instance */
523static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
524{
525 struct aem_data *data;
526 int i;
527 int res = -ENOMEM;
528
529 data = kzalloc(sizeof(*data), GFP_KERNEL);
530 if (!data)
531 return res;
532 mutex_init(&data->lock);
533
534 /* Copy instance data */
535 data->ver_major = 1;
536 data->ver_minor = 0;
537 data->module_handle = module_handle;
538 for (i = 0; i < AEM1_NUM_ENERGY_REGS; i++)
539 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
540
541 /* Create sub-device for this fw instance */
542 data->id = ida_alloc(&aem_ida, GFP_KERNEL);
543 if (data->id < 0)
544 goto id_err;
545
546 data->pdev = platform_device_alloc(DRVNAME, data->id);
547 if (!data->pdev)
548 goto dev_err;
549 data->pdev->dev.driver = &aem_driver.driver;
550
551 res = platform_device_add(data->pdev);
552 if (res)
553 goto dev_add_err;
554
555 platform_set_drvdata(data->pdev, data);
556
557 /* Set up IPMI interface */
558 res = aem_init_ipmi_data(&data->ipmi, probe->interface,
559 probe->bmc_device);
560 if (res)
561 goto ipmi_err;
562
563 /* Register with hwmon */
564 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
565 if (IS_ERR(data->hwmon_dev)) {
566 dev_err(&data->pdev->dev,
567 "Unable to register hwmon device for IPMI interface %d\n",
568 probe->interface);
569 res = PTR_ERR(data->hwmon_dev);
570 goto hwmon_reg_err;
571 }
572
573 data->update = update_aem1_sensors;
574 data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL);
575 if (!data->rs_resp) {
576 res = -ENOMEM;
577 goto alloc_resp_err;
578 }
579
580 /* Find sensors */
581 res = aem1_find_sensors(data);
582 if (res)
583 goto sensor_err;
584
585 /* Add to our list of AEM devices */
586 list_add_tail(&data->list, &driver_data.aem_devices);
587
588 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
589 data->ver_major, data->ver_minor,
590 data->module_handle);
591 return 0;
592
593sensor_err:
594 kfree(data->rs_resp);
595alloc_resp_err:
596 hwmon_device_unregister(data->hwmon_dev);
597hwmon_reg_err:
598 ipmi_destroy_user(data->ipmi.user);
599ipmi_err:
600 platform_set_drvdata(data->pdev, NULL);
601 platform_device_del(data->pdev);
602dev_add_err:
603 platform_device_put(data->pdev);
604dev_err:
605 ida_free(&aem_ida, data->id);
606id_err:
607 kfree(data);
608
609 return res;
610}
611
612/* Find and initialize all AEM1 instances */
613static void aem_init_aem1(struct aem_ipmi_data *probe)
614{
615 int num, i, err;
616
617 num = aem_find_aem1_count(probe);
618 for (i = 0; i < num; i++) {
619 err = aem_init_aem1_inst(probe, i);
620 if (err) {
621 dev_err(probe->bmc_device,
622 "Error %d initializing AEM1 0x%X\n",
623 err, i);
624 }
625 }
626}
627
628/* Probe functions for AEM2 devices */
629
630/* Retrieve version and module handle for an AEM2 instance */
631static int aem_find_aem2(struct aem_ipmi_data *data,
632 struct aem_find_instance_resp *fi_resp,
633 int instance_num)
634{
635 int res;
636 struct aem_find_instance_req fi_req;
637
638 fi_req.id = system_x_id;
639 fi_req.instance_number = instance_num;
640 fi_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
641
642 data->tx_message.cmd = AEM_FW_INSTANCE_CMD;
643 data->tx_message.data = (char *)&fi_req;
644 data->tx_message.data_len = sizeof(fi_req);
645
646 data->rx_msg_data = fi_resp;
647 data->rx_msg_len = sizeof(*fi_resp);
648
649 aem_send_message(data);
650
651 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
652 if (!res)
653 return -ETIMEDOUT;
654
655 if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) ||
656 memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) ||
657 fi_resp->num_instances <= instance_num)
658 return -ENOENT;
659
660 return 0;
661}
662
663/* Find and initialize one AEM2 instance */
664static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
665 struct aem_find_instance_resp *fi_resp)
666{
667 struct aem_data *data;
668 int i;
669 int res = -ENOMEM;
670
671 data = kzalloc(sizeof(*data), GFP_KERNEL);
672 if (!data)
673 return res;
674 mutex_init(&data->lock);
675
676 /* Copy instance data */
677 data->ver_major = fi_resp->major;
678 data->ver_minor = fi_resp->minor;
679 data->module_handle = fi_resp->module_handle;
680 for (i = 0; i < AEM2_NUM_ENERGY_REGS; i++)
681 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
682
683 /* Create sub-device for this fw instance */
684 data->id = ida_alloc(&aem_ida, GFP_KERNEL);
685 if (data->id < 0)
686 goto id_err;
687
688 data->pdev = platform_device_alloc(DRVNAME, data->id);
689 if (!data->pdev)
690 goto dev_err;
691 data->pdev->dev.driver = &aem_driver.driver;
692
693 res = platform_device_add(data->pdev);
694 if (res)
695 goto dev_add_err;
696
697 platform_set_drvdata(data->pdev, data);
698
699 /* Set up IPMI interface */
700 res = aem_init_ipmi_data(&data->ipmi, probe->interface,
701 probe->bmc_device);
702 if (res)
703 goto ipmi_err;
704
705 /* Register with hwmon */
706 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
707 if (IS_ERR(data->hwmon_dev)) {
708 dev_err(&data->pdev->dev,
709 "Unable to register hwmon device for IPMI interface %d\n",
710 probe->interface);
711 res = PTR_ERR(data->hwmon_dev);
712 goto hwmon_reg_err;
713 }
714
715 data->update = update_aem2_sensors;
716 data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL);
717 if (!data->rs_resp) {
718 res = -ENOMEM;
719 goto alloc_resp_err;
720 }
721
722 /* Find sensors */
723 res = aem2_find_sensors(data);
724 if (res)
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 kfree(data->rs_resp);
737alloc_resp_err:
738 hwmon_device_unregister(data->hwmon_dev);
739hwmon_reg_err:
740 ipmi_destroy_user(data->ipmi.user);
741ipmi_err:
742 platform_set_drvdata(data->pdev, NULL);
743 platform_device_del(data->pdev);
744dev_add_err:
745 platform_device_put(data->pdev);
746dev_err:
747 ida_free(&aem_ida, data->id);
748id_err:
749 kfree(data);
750
751 return res;
752}
753
754/* Find and initialize all AEM2 instances */
755static void aem_init_aem2(struct aem_ipmi_data *probe)
756{
757 struct aem_find_instance_resp fi_resp;
758 int err;
759 int i = 0;
760
761 while (!aem_find_aem2(probe, &fi_resp, i)) {
762 if (fi_resp.major != 2) {
763 dev_err(probe->bmc_device,
764 "Unknown AEM v%d; please report this to the maintainer.\n",
765 fi_resp.major);
766 i++;
767 continue;
768 }
769 err = aem_init_aem2_inst(probe, &fi_resp);
770 if (err) {
771 dev_err(probe->bmc_device,
772 "Error %d initializing AEM2 0x%X\n",
773 err, fi_resp.module_handle);
774 }
775 i++;
776 }
777}
778
779/* Probe a BMC for AEM firmware instances */
780static void aem_register_bmc(int iface, struct device *dev)
781{
782 struct aem_ipmi_data probe;
783
784 if (aem_init_ipmi_data(&probe, iface, dev))
785 return;
786
787 /* Ignore probe errors; they won't cause problems */
788 aem_init_aem1(&probe);
789 aem_init_aem2(&probe);
790
791 ipmi_destroy_user(probe.user);
792}
793
794/* Handle BMC deletion */
795static void aem_bmc_gone(int iface)
796{
797 struct aem_data *p1, *next1;
798
799 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
800 if (p1->ipmi.interface == iface)
801 aem_delete(p1);
802}
803
804/* sysfs support functions */
805
806/* AEM device name */
807static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
808 char *buf)
809{
810 struct aem_data *data = dev_get_drvdata(dev);
811
812 return sprintf(buf, "%s%d\n", DRVNAME, data->ver_major);
813}
814static SENSOR_DEVICE_ATTR_RO(name, name, 0);
815
816/* AEM device version */
817static ssize_t version_show(struct device *dev,
818 struct device_attribute *devattr, 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_RO(version, version, 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
836 mutex_lock(&data->lock);
837 update_aem_energy_one(data, attr->index);
838 time = ktime_get_ns();
839 before = data->energy[attr->index];
840
841 leftover = schedule_timeout_interruptible(
842 msecs_to_jiffies(data->power_period[attr->index])
843 );
844 if (leftover) {
845 mutex_unlock(&data->lock);
846 return 0;
847 }
848
849 update_aem_energy_one(data, attr->index);
850 time = ktime_get_ns() - time;
851 after = data->energy[attr->index];
852 mutex_unlock(&data->lock);
853
854 delta = (after - before) * UJ_PER_MJ;
855
856 return sprintf(buf, "%llu\n",
857 (unsigned long long)div64_u64(delta * NSEC_PER_SEC, time));
858}
859
860/* Display energy use */
861static ssize_t aem_show_energy(struct device *dev,
862 struct device_attribute *devattr,
863 char *buf)
864{
865 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
866 struct aem_data *a = dev_get_drvdata(dev);
867 mutex_lock(&a->lock);
868 update_aem_energy_one(a, attr->index);
869 mutex_unlock(&a->lock);
870
871 return sprintf(buf, "%llu\n",
872 (unsigned long long)a->energy[attr->index] * 1000);
873}
874
875/* Display power interval registers */
876static ssize_t aem_show_power_period(struct device *dev,
877 struct device_attribute *devattr,
878 char *buf)
879{
880 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
881 struct aem_data *a = dev_get_drvdata(dev);
882 a->update(a);
883
884 return sprintf(buf, "%lu\n", a->power_period[attr->index]);
885}
886
887/* Set power interval registers */
888static ssize_t aem_set_power_period(struct device *dev,
889 struct device_attribute *devattr,
890 const char *buf, size_t count)
891{
892 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
893 struct aem_data *a = dev_get_drvdata(dev);
894 unsigned long temp;
895 int res;
896
897 res = kstrtoul(buf, 10, &temp);
898 if (res)
899 return res;
900
901 if (temp < AEM_MIN_POWER_INTERVAL)
902 return -EINVAL;
903
904 mutex_lock(&a->lock);
905 a->power_period[attr->index] = temp;
906 mutex_unlock(&a->lock);
907
908 return count;
909}
910
911/* Discover sensors on an AEM device */
912static int aem_register_sensors(struct aem_data *data,
913 const struct aem_ro_sensor_template *ro,
914 const struct aem_rw_sensor_template *rw)
915{
916 struct device *dev = &data->pdev->dev;
917 struct sensor_device_attribute *sensors = data->sensors;
918 int err;
919
920 /* Set up read-only sensors */
921 while (ro->label) {
922 sysfs_attr_init(&sensors->dev_attr.attr);
923 sensors->dev_attr.attr.name = ro->label;
924 sensors->dev_attr.attr.mode = 0444;
925 sensors->dev_attr.show = ro->show;
926 sensors->index = ro->index;
927
928 err = device_create_file(dev, &sensors->dev_attr);
929 if (err) {
930 sensors->dev_attr.attr.name = NULL;
931 goto error;
932 }
933 sensors++;
934 ro++;
935 }
936
937 /* Set up read-write sensors */
938 while (rw->label) {
939 sysfs_attr_init(&sensors->dev_attr.attr);
940 sensors->dev_attr.attr.name = rw->label;
941 sensors->dev_attr.attr.mode = 0644;
942 sensors->dev_attr.show = rw->show;
943 sensors->dev_attr.store = rw->set;
944 sensors->index = rw->index;
945
946 err = device_create_file(dev, &sensors->dev_attr);
947 if (err) {
948 sensors->dev_attr.attr.name = NULL;
949 goto error;
950 }
951 sensors++;
952 rw++;
953 }
954
955 err = device_create_file(dev, &sensor_dev_attr_name.dev_attr);
956 if (err)
957 goto error;
958 err = device_create_file(dev, &sensor_dev_attr_version.dev_attr);
959 return err;
960
961error:
962 aem_remove_sensors(data);
963 return err;
964}
965
966/* sysfs support functions for AEM2 sensors */
967
968/* Display temperature use */
969static ssize_t aem2_show_temp(struct device *dev,
970 struct device_attribute *devattr,
971 char *buf)
972{
973 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
974 struct aem_data *a = dev_get_drvdata(dev);
975 a->update(a);
976
977 return sprintf(buf, "%u\n", a->temp[attr->index] * 1000);
978}
979
980/* Display power-capping registers */
981static ssize_t aem2_show_pcap_value(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->pcap[attr->index] * 100000);
990}
991
992/* Remove sensors attached to an AEM device */
993static void aem_remove_sensors(struct aem_data *data)
994{
995 int i;
996
997 for (i = 0; i < AEM_NUM_SENSORS; i++) {
998 if (!data->sensors[i].dev_attr.attr.name)
999 continue;
1000 device_remove_file(&data->pdev->dev,
1001 &data->sensors[i].dev_attr);
1002 }
1003
1004 device_remove_file(&data->pdev->dev,
1005 &sensor_dev_attr_name.dev_attr);
1006 device_remove_file(&data->pdev->dev,
1007 &sensor_dev_attr_version.dev_attr);
1008}
1009
1010/* Sensor probe functions */
1011
1012/* Description of AEM1 sensors */
1013static const struct aem_ro_sensor_template aem1_ro_sensors[] = {
1014{"energy1_input", aem_show_energy, 0},
1015{"power1_average", aem_show_power, 0},
1016{NULL, NULL, 0},
1017};
1018
1019static const struct aem_rw_sensor_template aem1_rw_sensors[] = {
1020{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1021{NULL, NULL, NULL, 0},
1022};
1023
1024/* Description of AEM2 sensors */
1025static const struct aem_ro_sensor_template aem2_ro_sensors[] = {
1026{"energy1_input", aem_show_energy, 0},
1027{"energy2_input", aem_show_energy, 1},
1028{"power1_average", aem_show_power, 0},
1029{"power2_average", aem_show_power, 1},
1030{"temp1_input", aem2_show_temp, 0},
1031{"temp2_input", aem2_show_temp, 1},
1032
1033{"power4_average", aem2_show_pcap_value, POWER_CAP_MAX_HOTPLUG},
1034{"power5_average", aem2_show_pcap_value, POWER_CAP_MAX},
1035{"power6_average", aem2_show_pcap_value, POWER_CAP_MIN_WARNING},
1036{"power7_average", aem2_show_pcap_value, POWER_CAP_MIN},
1037
1038{"power3_average", aem2_show_pcap_value, POWER_AUX},
1039{"power_cap", aem2_show_pcap_value, POWER_CAP},
1040{NULL, NULL, 0},
1041};
1042
1043static const struct aem_rw_sensor_template aem2_rw_sensors[] = {
1044{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1045{"power2_average_interval", aem_show_power_period, aem_set_power_period, 1},
1046{NULL, NULL, NULL, 0},
1047};
1048
1049/* Set up AEM1 sensor attrs */
1050static int aem1_find_sensors(struct aem_data *data)
1051{
1052 return aem_register_sensors(data, aem1_ro_sensors, aem1_rw_sensors);
1053}
1054
1055/* Set up AEM2 sensor attrs */
1056static int aem2_find_sensors(struct aem_data *data)
1057{
1058 return aem_register_sensors(data, aem2_ro_sensors, aem2_rw_sensors);
1059}
1060
1061/* Module init/exit routines */
1062
1063static int __init aem_init(void)
1064{
1065 int res;
1066
1067 res = driver_register(&aem_driver.driver);
1068 if (res) {
1069 pr_err("Can't register aem driver\n");
1070 return res;
1071 }
1072
1073 res = ipmi_smi_watcher_register(&driver_data.bmc_events);
1074 if (res)
1075 goto ipmi_reg_err;
1076 return 0;
1077
1078ipmi_reg_err:
1079 driver_unregister(&aem_driver.driver);
1080 return res;
1081
1082}
1083
1084static void __exit aem_exit(void)
1085{
1086 struct aem_data *p1, *next1;
1087
1088 ipmi_smi_watcher_unregister(&driver_data.bmc_events);
1089 driver_unregister(&aem_driver.driver);
1090 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
1091 aem_delete(p1);
1092}
1093
1094MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1095MODULE_DESCRIPTION("IBM AEM power/temp/energy sensor driver");
1096MODULE_LICENSE("GPL");
1097
1098module_init(aem_init);
1099module_exit(aem_exit);
1100
1101MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3350-*");
1102MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3550-*");
1103MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3650-*");
1104MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3655-*");
1105MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3755-*");
1106MODULE_ALIAS("dmi:bvnIBM:*:pnIBM3850M2/x3950M2-*");
1107MODULE_ALIAS("dmi:bvnIBM:*:pnIBMBladeHC10-*");
1/*
2 * A hwmon driver for the IBM System Director Active Energy Manager (AEM)
3 * temperature/power/energy sensors and capping functionality.
4 * Copyright (C) 2008 IBM
5 *
6 * Author: Darrick J. Wong <darrick.wong@oracle.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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
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>
34#include <linux/slab.h>
35#include <linux/sched.h>
36#include <linux/platform_device.h>
37#include <linux/math64.h>
38#include <linux/time.h>
39#include <linux/err.h>
40
41#define REFRESH_INTERVAL (HZ)
42#define IPMI_TIMEOUT (30 * HZ)
43#define DRVNAME "aem"
44
45#define AEM_NETFN 0x2E
46
47#define AEM_FIND_FW_CMD 0x80
48#define AEM_ELEMENT_CMD 0x81
49#define AEM_FW_INSTANCE_CMD 0x82
50
51#define AEM_READ_ELEMENT_CFG 0x80
52#define AEM_READ_BUFFER 0x81
53#define AEM_READ_REGISTER 0x82
54#define AEM_WRITE_REGISTER 0x83
55#define AEM_SET_REG_MASK 0x84
56#define AEM_CLEAR_REG_MASK 0x85
57#define AEM_READ_ELEMENT_CFG2 0x86
58
59#define AEM_CONTROL_ELEMENT 0
60#define AEM_ENERGY_ELEMENT 1
61#define AEM_CLOCK_ELEMENT 4
62#define AEM_POWER_CAP_ELEMENT 7
63#define AEM_EXHAUST_ELEMENT 9
64#define AEM_POWER_ELEMENT 10
65
66#define AEM_MODULE_TYPE_ID 0x0001
67
68#define AEM2_NUM_ENERGY_REGS 2
69#define AEM2_NUM_PCAP_REGS 6
70#define AEM2_NUM_TEMP_REGS 2
71#define AEM2_NUM_SENSORS 14
72
73#define AEM1_NUM_ENERGY_REGS 1
74#define AEM1_NUM_SENSORS 3
75
76/* AEM 2.x has more energy registers */
77#define AEM_NUM_ENERGY_REGS AEM2_NUM_ENERGY_REGS
78/* AEM 2.x needs more sensor files */
79#define AEM_NUM_SENSORS AEM2_NUM_SENSORS
80
81#define POWER_CAP 0
82#define POWER_CAP_MAX_HOTPLUG 1
83#define POWER_CAP_MAX 2
84#define POWER_CAP_MIN_WARNING 3
85#define POWER_CAP_MIN 4
86#define POWER_AUX 5
87
88#define AEM_DEFAULT_POWER_INTERVAL 1000
89#define AEM_MIN_POWER_INTERVAL 200
90#define UJ_PER_MJ 1000L
91
92static DEFINE_IDA(aem_ida);
93
94static struct platform_driver aem_driver = {
95 .driver = {
96 .name = DRVNAME,
97 .bus = &platform_bus_type,
98 }
99};
100
101struct aem_ipmi_data {
102 struct completion read_complete;
103 struct ipmi_addr address;
104 ipmi_user_t user;
105 int interface;
106
107 struct kernel_ipmi_msg tx_message;
108 long tx_msgid;
109
110 void *rx_msg_data;
111 unsigned short rx_msg_len;
112 unsigned char rx_result;
113 int rx_recv_type;
114
115 struct device *bmc_device;
116};
117
118struct aem_ro_sensor_template {
119 char *label;
120 ssize_t (*show)(struct device *dev,
121 struct device_attribute *devattr,
122 char *buf);
123 int index;
124};
125
126struct aem_rw_sensor_template {
127 char *label;
128 ssize_t (*show)(struct device *dev,
129 struct device_attribute *devattr,
130 char *buf);
131 ssize_t (*set)(struct device *dev,
132 struct device_attribute *devattr,
133 const char *buf, size_t count);
134 int index;
135};
136
137struct aem_data {
138 struct list_head list;
139
140 struct device *hwmon_dev;
141 struct platform_device *pdev;
142 struct mutex lock;
143 char valid;
144 unsigned long last_updated; /* In jiffies */
145 u8 ver_major;
146 u8 ver_minor;
147 u8 module_handle;
148 int id;
149 struct aem_ipmi_data ipmi;
150
151 /* Function and buffer to update sensors */
152 void (*update)(struct aem_data *data);
153 struct aem_read_sensor_resp *rs_resp;
154
155 /*
156 * AEM 1.x sensors:
157 * Available sensors:
158 * Energy meter
159 * Power meter
160 *
161 * AEM 2.x sensors:
162 * Two energy meters
163 * Two power meters
164 * Two temperature sensors
165 * Six power cap registers
166 */
167
168 /* sysfs attrs */
169 struct sensor_device_attribute sensors[AEM_NUM_SENSORS];
170
171 /* energy use in mJ */
172 u64 energy[AEM_NUM_ENERGY_REGS];
173
174 /* power sampling interval in ms */
175 unsigned long power_period[AEM_NUM_ENERGY_REGS];
176
177 /* Everything past here is for AEM2 only */
178
179 /* power caps in dW */
180 u16 pcap[AEM2_NUM_PCAP_REGS];
181
182 /* exhaust temperature in C */
183 u8 temp[AEM2_NUM_TEMP_REGS];
184};
185
186/* Data structures returned by the AEM firmware */
187struct aem_iana_id {
188 u8 bytes[3];
189};
190static struct aem_iana_id system_x_id = {
191 .bytes = {0x4D, 0x4F, 0x00}
192};
193
194/* These are used to find AEM1 instances */
195struct aem_find_firmware_req {
196 struct aem_iana_id id;
197 u8 rsvd;
198 __be16 index;
199 __be16 module_type_id;
200} __packed;
201
202struct aem_find_firmware_resp {
203 struct aem_iana_id id;
204 u8 num_instances;
205} __packed;
206
207/* These are used to find AEM2 instances */
208struct aem_find_instance_req {
209 struct aem_iana_id id;
210 u8 instance_number;
211 __be16 module_type_id;
212} __packed;
213
214struct aem_find_instance_resp {
215 struct aem_iana_id id;
216 u8 num_instances;
217 u8 major;
218 u8 minor;
219 u8 module_handle;
220 u16 record_id;
221} __packed;
222
223/* These are used to query sensors */
224struct aem_read_sensor_req {
225 struct aem_iana_id id;
226 u8 module_handle;
227 u8 element;
228 u8 subcommand;
229 u8 reg;
230 u8 rx_buf_size;
231} __packed;
232
233struct aem_read_sensor_resp {
234 struct aem_iana_id id;
235 u8 bytes[0];
236} __packed;
237
238/* Data structures to talk to the IPMI layer */
239struct aem_driver_data {
240 struct list_head aem_devices;
241 struct ipmi_smi_watcher bmc_events;
242 struct ipmi_user_hndl ipmi_hndlrs;
243};
244
245static void aem_register_bmc(int iface, struct device *dev);
246static void aem_bmc_gone(int iface);
247static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
248
249static void aem_remove_sensors(struct aem_data *data);
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,
293 "Unable to register user with IPMI interface %d\n",
294 data->interface);
295 return err;
296 }
297
298 return 0;
299}
300
301/* Send an IPMI command */
302static int aem_send_message(struct aem_ipmi_data *data)
303{
304 int err;
305
306 err = ipmi_validate_addr(&data->address, sizeof(data->address));
307 if (err)
308 goto out;
309
310 data->tx_msgid++;
311 err = ipmi_request_settime(data->user, &data->address, data->tx_msgid,
312 &data->tx_message, data, 0, 0, 0);
313 if (err)
314 goto out1;
315
316 return 0;
317out1:
318 dev_err(data->bmc_device, "request_settime=%x\n", err);
319 return err;
320out:
321 dev_err(data->bmc_device, "validate_addr=%x\n", err);
322 return err;
323}
324
325/* Dispatch IPMI messages to callers */
326static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
327{
328 unsigned short rx_len;
329 struct aem_ipmi_data *data = user_msg_data;
330
331 if (msg->msgid != data->tx_msgid) {
332 dev_err(data->bmc_device,
333 "Mismatch between received msgid (%02x) and transmitted msgid (%02x)!\n",
334 (int)msg->msgid,
335 (int)data->tx_msgid);
336 ipmi_free_recv_msg(msg);
337 return;
338 }
339
340 data->rx_recv_type = msg->recv_type;
341 if (msg->msg.data_len > 0)
342 data->rx_result = msg->msg.data[0];
343 else
344 data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE;
345
346 if (msg->msg.data_len > 1) {
347 rx_len = msg->msg.data_len - 1;
348 if (data->rx_msg_len < rx_len)
349 rx_len = data->rx_msg_len;
350 data->rx_msg_len = rx_len;
351 memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len);
352 } else
353 data->rx_msg_len = 0;
354
355 ipmi_free_recv_msg(msg);
356 complete(&data->read_complete);
357}
358
359/* Sensor support functions */
360
361/* Read a sensor value; must be called with data->lock held */
362static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
363 void *buf, size_t size)
364{
365 int rs_size, res;
366 struct aem_read_sensor_req rs_req;
367 /* Use preallocated rx buffer */
368 struct aem_read_sensor_resp *rs_resp = data->rs_resp;
369 struct aem_ipmi_data *ipmi = &data->ipmi;
370
371 /* AEM registers are 1, 2, 4 or 8 bytes */
372 switch (size) {
373 case 1:
374 case 2:
375 case 4:
376 case 8:
377 break;
378 default:
379 return -EINVAL;
380 }
381
382 rs_req.id = system_x_id;
383 rs_req.module_handle = data->module_handle;
384 rs_req.element = elt;
385 rs_req.subcommand = AEM_READ_REGISTER;
386 rs_req.reg = reg;
387 rs_req.rx_buf_size = size;
388
389 ipmi->tx_message.cmd = AEM_ELEMENT_CMD;
390 ipmi->tx_message.data = (char *)&rs_req;
391 ipmi->tx_message.data_len = sizeof(rs_req);
392
393 rs_size = sizeof(*rs_resp) + size;
394 ipmi->rx_msg_data = rs_resp;
395 ipmi->rx_msg_len = rs_size;
396
397 aem_send_message(ipmi);
398
399 res = wait_for_completion_timeout(&ipmi->read_complete, IPMI_TIMEOUT);
400 if (!res) {
401 res = -ETIMEDOUT;
402 goto out;
403 }
404
405 if (ipmi->rx_result || ipmi->rx_msg_len != rs_size ||
406 memcmp(&rs_resp->id, &system_x_id, sizeof(system_x_id))) {
407 res = -ENOENT;
408 goto out;
409 }
410
411 switch (size) {
412 case 1: {
413 u8 *x = buf;
414 *x = rs_resp->bytes[0];
415 break;
416 }
417 case 2: {
418 u16 *x = buf;
419 *x = be16_to_cpup((__be16 *)rs_resp->bytes);
420 break;
421 }
422 case 4: {
423 u32 *x = buf;
424 *x = be32_to_cpup((__be32 *)rs_resp->bytes);
425 break;
426 }
427 case 8: {
428 u64 *x = buf;
429 *x = be64_to_cpup((__be64 *)rs_resp->bytes);
430 break;
431 }
432 }
433 res = 0;
434
435out:
436 return res;
437}
438
439/* Update AEM energy registers */
440static void update_aem_energy_one(struct aem_data *data, int which)
441{
442 aem_read_sensor(data, AEM_ENERGY_ELEMENT, which,
443 &data->energy[which], 8);
444}
445
446static void update_aem_energy(struct aem_data *data)
447{
448 update_aem_energy_one(data, 0);
449 if (data->ver_major < 2)
450 return;
451 update_aem_energy_one(data, 1);
452}
453
454/* Update all AEM1 sensors */
455static void update_aem1_sensors(struct aem_data *data)
456{
457 mutex_lock(&data->lock);
458 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
459 data->valid)
460 goto out;
461
462 update_aem_energy(data);
463out:
464 mutex_unlock(&data->lock);
465}
466
467/* Update all AEM2 sensors */
468static void update_aem2_sensors(struct aem_data *data)
469{
470 int i;
471
472 mutex_lock(&data->lock);
473 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
474 data->valid)
475 goto out;
476
477 update_aem_energy(data);
478 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 0, &data->temp[0], 1);
479 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 1, &data->temp[1], 1);
480
481 for (i = POWER_CAP; i <= POWER_AUX; i++)
482 aem_read_sensor(data, AEM_POWER_CAP_ELEMENT, i,
483 &data->pcap[i], 2);
484out:
485 mutex_unlock(&data->lock);
486}
487
488/* Delete an AEM instance */
489static void aem_delete(struct aem_data *data)
490{
491 list_del(&data->list);
492 aem_remove_sensors(data);
493 kfree(data->rs_resp);
494 hwmon_device_unregister(data->hwmon_dev);
495 ipmi_destroy_user(data->ipmi.user);
496 platform_set_drvdata(data->pdev, NULL);
497 platform_device_unregister(data->pdev);
498 ida_simple_remove(&aem_ida, data->id);
499 kfree(data);
500}
501
502/* Probe functions for AEM1 devices */
503
504/* Retrieve version and module handle for an AEM1 instance */
505static int aem_find_aem1_count(struct aem_ipmi_data *data)
506{
507 int res;
508 struct aem_find_firmware_req ff_req;
509 struct aem_find_firmware_resp ff_resp;
510
511 ff_req.id = system_x_id;
512 ff_req.index = 0;
513 ff_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
514
515 data->tx_message.cmd = AEM_FIND_FW_CMD;
516 data->tx_message.data = (char *)&ff_req;
517 data->tx_message.data_len = sizeof(ff_req);
518
519 data->rx_msg_data = &ff_resp;
520 data->rx_msg_len = sizeof(ff_resp);
521
522 aem_send_message(data);
523
524 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
525 if (!res)
526 return -ETIMEDOUT;
527
528 if (data->rx_result || data->rx_msg_len != sizeof(ff_resp) ||
529 memcmp(&ff_resp.id, &system_x_id, sizeof(system_x_id)))
530 return -ENOENT;
531
532 return ff_resp.num_instances;
533}
534
535/* Find and initialize one AEM1 instance */
536static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
537{
538 struct aem_data *data;
539 int i;
540 int res = -ENOMEM;
541
542 data = kzalloc(sizeof(*data), GFP_KERNEL);
543 if (!data)
544 return res;
545 mutex_init(&data->lock);
546
547 /* Copy instance data */
548 data->ver_major = 1;
549 data->ver_minor = 0;
550 data->module_handle = module_handle;
551 for (i = 0; i < AEM1_NUM_ENERGY_REGS; i++)
552 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
553
554 /* Create sub-device for this fw instance */
555 data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
556 if (data->id < 0)
557 goto id_err;
558
559 data->pdev = platform_device_alloc(DRVNAME, data->id);
560 if (!data->pdev)
561 goto dev_err;
562 data->pdev->dev.driver = &aem_driver.driver;
563
564 res = platform_device_add(data->pdev);
565 if (res)
566 goto ipmi_err;
567
568 platform_set_drvdata(data->pdev, data);
569
570 /* Set up IPMI interface */
571 res = aem_init_ipmi_data(&data->ipmi, probe->interface,
572 probe->bmc_device);
573 if (res)
574 goto ipmi_err;
575
576 /* Register with hwmon */
577 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
578 if (IS_ERR(data->hwmon_dev)) {
579 dev_err(&data->pdev->dev,
580 "Unable to register hwmon device for IPMI interface %d\n",
581 probe->interface);
582 res = PTR_ERR(data->hwmon_dev);
583 goto hwmon_reg_err;
584 }
585
586 data->update = update_aem1_sensors;
587 data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL);
588 if (!data->rs_resp) {
589 res = -ENOMEM;
590 goto alloc_resp_err;
591 }
592
593 /* Find sensors */
594 res = aem1_find_sensors(data);
595 if (res)
596 goto sensor_err;
597
598 /* Add to our list of AEM devices */
599 list_add_tail(&data->list, &driver_data.aem_devices);
600
601 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
602 data->ver_major, data->ver_minor,
603 data->module_handle);
604 return 0;
605
606sensor_err:
607 kfree(data->rs_resp);
608alloc_resp_err:
609 hwmon_device_unregister(data->hwmon_dev);
610hwmon_reg_err:
611 ipmi_destroy_user(data->ipmi.user);
612ipmi_err:
613 platform_set_drvdata(data->pdev, NULL);
614 platform_device_unregister(data->pdev);
615dev_err:
616 ida_simple_remove(&aem_ida, data->id);
617id_err:
618 kfree(data);
619
620 return res;
621}
622
623/* Find and initialize all AEM1 instances */
624static void aem_init_aem1(struct aem_ipmi_data *probe)
625{
626 int num, i, err;
627
628 num = aem_find_aem1_count(probe);
629 for (i = 0; i < num; i++) {
630 err = aem_init_aem1_inst(probe, i);
631 if (err) {
632 dev_err(probe->bmc_device,
633 "Error %d initializing AEM1 0x%X\n",
634 err, i);
635 }
636 }
637}
638
639/* Probe functions for AEM2 devices */
640
641/* Retrieve version and module handle for an AEM2 instance */
642static int aem_find_aem2(struct aem_ipmi_data *data,
643 struct aem_find_instance_resp *fi_resp,
644 int instance_num)
645{
646 int res;
647 struct aem_find_instance_req fi_req;
648
649 fi_req.id = system_x_id;
650 fi_req.instance_number = instance_num;
651 fi_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
652
653 data->tx_message.cmd = AEM_FW_INSTANCE_CMD;
654 data->tx_message.data = (char *)&fi_req;
655 data->tx_message.data_len = sizeof(fi_req);
656
657 data->rx_msg_data = fi_resp;
658 data->rx_msg_len = sizeof(*fi_resp);
659
660 aem_send_message(data);
661
662 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
663 if (!res)
664 return -ETIMEDOUT;
665
666 if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) ||
667 memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) ||
668 fi_resp->num_instances <= instance_num)
669 return -ENOENT;
670
671 return 0;
672}
673
674/* Find and initialize one AEM2 instance */
675static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
676 struct aem_find_instance_resp *fi_resp)
677{
678 struct aem_data *data;
679 int i;
680 int res = -ENOMEM;
681
682 data = kzalloc(sizeof(*data), GFP_KERNEL);
683 if (!data)
684 return res;
685 mutex_init(&data->lock);
686
687 /* Copy instance data */
688 data->ver_major = fi_resp->major;
689 data->ver_minor = fi_resp->minor;
690 data->module_handle = fi_resp->module_handle;
691 for (i = 0; i < AEM2_NUM_ENERGY_REGS; i++)
692 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
693
694 /* Create sub-device for this fw instance */
695 data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
696 if (data->id < 0)
697 goto id_err;
698
699 data->pdev = platform_device_alloc(DRVNAME, data->id);
700 if (!data->pdev)
701 goto dev_err;
702 data->pdev->dev.driver = &aem_driver.driver;
703
704 res = platform_device_add(data->pdev);
705 if (res)
706 goto ipmi_err;
707
708 platform_set_drvdata(data->pdev, data);
709
710 /* Set up IPMI interface */
711 res = aem_init_ipmi_data(&data->ipmi, probe->interface,
712 probe->bmc_device);
713 if (res)
714 goto ipmi_err;
715
716 /* Register with hwmon */
717 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
718 if (IS_ERR(data->hwmon_dev)) {
719 dev_err(&data->pdev->dev,
720 "Unable to register hwmon device for IPMI interface %d\n",
721 probe->interface);
722 res = PTR_ERR(data->hwmon_dev);
723 goto hwmon_reg_err;
724 }
725
726 data->update = update_aem2_sensors;
727 data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL);
728 if (!data->rs_resp) {
729 res = -ENOMEM;
730 goto alloc_resp_err;
731 }
732
733 /* Find sensors */
734 res = aem2_find_sensors(data);
735 if (res)
736 goto sensor_err;
737
738 /* Add to our list of AEM devices */
739 list_add_tail(&data->list, &driver_data.aem_devices);
740
741 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
742 data->ver_major, data->ver_minor,
743 data->module_handle);
744 return 0;
745
746sensor_err:
747 kfree(data->rs_resp);
748alloc_resp_err:
749 hwmon_device_unregister(data->hwmon_dev);
750hwmon_reg_err:
751 ipmi_destroy_user(data->ipmi.user);
752ipmi_err:
753 platform_set_drvdata(data->pdev, NULL);
754 platform_device_unregister(data->pdev);
755dev_err:
756 ida_simple_remove(&aem_ida, data->id);
757id_err:
758 kfree(data);
759
760 return res;
761}
762
763/* Find and initialize all AEM2 instances */
764static void aem_init_aem2(struct aem_ipmi_data *probe)
765{
766 struct aem_find_instance_resp fi_resp;
767 int err;
768 int i = 0;
769
770 while (!aem_find_aem2(probe, &fi_resp, i)) {
771 if (fi_resp.major != 2) {
772 dev_err(probe->bmc_device,
773 "Unknown AEM v%d; please report this to the maintainer.\n",
774 fi_resp.major);
775 i++;
776 continue;
777 }
778 err = aem_init_aem2_inst(probe, &fi_resp);
779 if (err) {
780 dev_err(probe->bmc_device,
781 "Error %d initializing AEM2 0x%X\n",
782 err, fi_resp.module_handle);
783 }
784 i++;
785 }
786}
787
788/* Probe a BMC for AEM firmware instances */
789static void aem_register_bmc(int iface, struct device *dev)
790{
791 struct aem_ipmi_data probe;
792
793 if (aem_init_ipmi_data(&probe, iface, dev))
794 return;
795
796 /* Ignore probe errors; they won't cause problems */
797 aem_init_aem1(&probe);
798 aem_init_aem2(&probe);
799
800 ipmi_destroy_user(probe.user);
801}
802
803/* Handle BMC deletion */
804static void aem_bmc_gone(int iface)
805{
806 struct aem_data *p1, *next1;
807
808 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
809 if (p1->ipmi.interface == iface)
810 aem_delete(p1);
811}
812
813/* sysfs support functions */
814
815/* AEM device name */
816static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
817 char *buf)
818{
819 struct aem_data *data = dev_get_drvdata(dev);
820
821 return sprintf(buf, "%s%d\n", DRVNAME, data->ver_major);
822}
823static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
824
825/* AEM device version */
826static ssize_t show_version(struct device *dev,
827 struct device_attribute *devattr,
828 char *buf)
829{
830 struct aem_data *data = dev_get_drvdata(dev);
831
832 return sprintf(buf, "%d.%d\n", data->ver_major, data->ver_minor);
833}
834static SENSOR_DEVICE_ATTR(version, S_IRUGO, show_version, NULL, 0);
835
836/* Display power use */
837static ssize_t aem_show_power(struct device *dev,
838 struct device_attribute *devattr,
839 char *buf)
840{
841 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
842 struct aem_data *data = dev_get_drvdata(dev);
843 u64 before, after, delta, time;
844 signed long leftover;
845
846 mutex_lock(&data->lock);
847 update_aem_energy_one(data, attr->index);
848 time = ktime_get_ns();
849 before = data->energy[attr->index];
850
851 leftover = schedule_timeout_interruptible(
852 msecs_to_jiffies(data->power_period[attr->index])
853 );
854 if (leftover) {
855 mutex_unlock(&data->lock);
856 return 0;
857 }
858
859 update_aem_energy_one(data, attr->index);
860 time = ktime_get_ns() - time;
861 after = data->energy[attr->index];
862 mutex_unlock(&data->lock);
863
864 delta = (after - before) * UJ_PER_MJ;
865
866 return sprintf(buf, "%llu\n",
867 (unsigned long long)div64_u64(delta * NSEC_PER_SEC, time));
868}
869
870/* Display energy use */
871static ssize_t aem_show_energy(struct device *dev,
872 struct device_attribute *devattr,
873 char *buf)
874{
875 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
876 struct aem_data *a = dev_get_drvdata(dev);
877 mutex_lock(&a->lock);
878 update_aem_energy_one(a, attr->index);
879 mutex_unlock(&a->lock);
880
881 return sprintf(buf, "%llu\n",
882 (unsigned long long)a->energy[attr->index] * 1000);
883}
884
885/* Display power interval registers */
886static ssize_t aem_show_power_period(struct device *dev,
887 struct device_attribute *devattr,
888 char *buf)
889{
890 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
891 struct aem_data *a = dev_get_drvdata(dev);
892 a->update(a);
893
894 return sprintf(buf, "%lu\n", a->power_period[attr->index]);
895}
896
897/* Set power interval registers */
898static ssize_t aem_set_power_period(struct device *dev,
899 struct device_attribute *devattr,
900 const char *buf, size_t count)
901{
902 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
903 struct aem_data *a = dev_get_drvdata(dev);
904 unsigned long temp;
905 int res;
906
907 res = kstrtoul(buf, 10, &temp);
908 if (res)
909 return res;
910
911 if (temp < AEM_MIN_POWER_INTERVAL)
912 return -EINVAL;
913
914 mutex_lock(&a->lock);
915 a->power_period[attr->index] = temp;
916 mutex_unlock(&a->lock);
917
918 return count;
919}
920
921/* Discover sensors on an AEM device */
922static int aem_register_sensors(struct aem_data *data,
923 const struct aem_ro_sensor_template *ro,
924 const struct aem_rw_sensor_template *rw)
925{
926 struct device *dev = &data->pdev->dev;
927 struct sensor_device_attribute *sensors = data->sensors;
928 int err;
929
930 /* Set up read-only sensors */
931 while (ro->label) {
932 sysfs_attr_init(&sensors->dev_attr.attr);
933 sensors->dev_attr.attr.name = ro->label;
934 sensors->dev_attr.attr.mode = S_IRUGO;
935 sensors->dev_attr.show = ro->show;
936 sensors->index = ro->index;
937
938 err = device_create_file(dev, &sensors->dev_attr);
939 if (err) {
940 sensors->dev_attr.attr.name = NULL;
941 goto error;
942 }
943 sensors++;
944 ro++;
945 }
946
947 /* Set up read-write sensors */
948 while (rw->label) {
949 sysfs_attr_init(&sensors->dev_attr.attr);
950 sensors->dev_attr.attr.name = rw->label;
951 sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR;
952 sensors->dev_attr.show = rw->show;
953 sensors->dev_attr.store = rw->set;
954 sensors->index = rw->index;
955
956 err = device_create_file(dev, &sensors->dev_attr);
957 if (err) {
958 sensors->dev_attr.attr.name = NULL;
959 goto error;
960 }
961 sensors++;
962 rw++;
963 }
964
965 err = device_create_file(dev, &sensor_dev_attr_name.dev_attr);
966 if (err)
967 goto error;
968 err = device_create_file(dev, &sensor_dev_attr_version.dev_attr);
969 return err;
970
971error:
972 aem_remove_sensors(data);
973 return err;
974}
975
976/* sysfs support functions for AEM2 sensors */
977
978/* Display temperature use */
979static ssize_t aem2_show_temp(struct device *dev,
980 struct device_attribute *devattr,
981 char *buf)
982{
983 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
984 struct aem_data *a = dev_get_drvdata(dev);
985 a->update(a);
986
987 return sprintf(buf, "%u\n", a->temp[attr->index] * 1000);
988}
989
990/* Display power-capping registers */
991static ssize_t aem2_show_pcap_value(struct device *dev,
992 struct device_attribute *devattr,
993 char *buf)
994{
995 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
996 struct aem_data *a = dev_get_drvdata(dev);
997 a->update(a);
998
999 return sprintf(buf, "%u\n", a->pcap[attr->index] * 100000);
1000}
1001
1002/* Remove sensors attached to an AEM device */
1003static void aem_remove_sensors(struct aem_data *data)
1004{
1005 int i;
1006
1007 for (i = 0; i < AEM_NUM_SENSORS; i++) {
1008 if (!data->sensors[i].dev_attr.attr.name)
1009 continue;
1010 device_remove_file(&data->pdev->dev,
1011 &data->sensors[i].dev_attr);
1012 }
1013
1014 device_remove_file(&data->pdev->dev,
1015 &sensor_dev_attr_name.dev_attr);
1016 device_remove_file(&data->pdev->dev,
1017 &sensor_dev_attr_version.dev_attr);
1018}
1019
1020/* Sensor probe functions */
1021
1022/* Description of AEM1 sensors */
1023static const struct aem_ro_sensor_template aem1_ro_sensors[] = {
1024{"energy1_input", aem_show_energy, 0},
1025{"power1_average", aem_show_power, 0},
1026{NULL, NULL, 0},
1027};
1028
1029static const struct aem_rw_sensor_template aem1_rw_sensors[] = {
1030{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1031{NULL, NULL, NULL, 0},
1032};
1033
1034/* Description of AEM2 sensors */
1035static const struct aem_ro_sensor_template aem2_ro_sensors[] = {
1036{"energy1_input", aem_show_energy, 0},
1037{"energy2_input", aem_show_energy, 1},
1038{"power1_average", aem_show_power, 0},
1039{"power2_average", aem_show_power, 1},
1040{"temp1_input", aem2_show_temp, 0},
1041{"temp2_input", aem2_show_temp, 1},
1042
1043{"power4_average", aem2_show_pcap_value, POWER_CAP_MAX_HOTPLUG},
1044{"power5_average", aem2_show_pcap_value, POWER_CAP_MAX},
1045{"power6_average", aem2_show_pcap_value, POWER_CAP_MIN_WARNING},
1046{"power7_average", aem2_show_pcap_value, POWER_CAP_MIN},
1047
1048{"power3_average", aem2_show_pcap_value, POWER_AUX},
1049{"power_cap", aem2_show_pcap_value, POWER_CAP},
1050{NULL, NULL, 0},
1051};
1052
1053static const struct aem_rw_sensor_template aem2_rw_sensors[] = {
1054{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1055{"power2_average_interval", aem_show_power_period, aem_set_power_period, 1},
1056{NULL, NULL, NULL, 0},
1057};
1058
1059/* Set up AEM1 sensor attrs */
1060static int aem1_find_sensors(struct aem_data *data)
1061{
1062 return aem_register_sensors(data, aem1_ro_sensors, aem1_rw_sensors);
1063}
1064
1065/* Set up AEM2 sensor attrs */
1066static int aem2_find_sensors(struct aem_data *data)
1067{
1068 return aem_register_sensors(data, aem2_ro_sensors, aem2_rw_sensors);
1069}
1070
1071/* Module init/exit routines */
1072
1073static int __init aem_init(void)
1074{
1075 int res;
1076
1077 res = driver_register(&aem_driver.driver);
1078 if (res) {
1079 pr_err("Can't register aem driver\n");
1080 return res;
1081 }
1082
1083 res = ipmi_smi_watcher_register(&driver_data.bmc_events);
1084 if (res)
1085 goto ipmi_reg_err;
1086 return 0;
1087
1088ipmi_reg_err:
1089 driver_unregister(&aem_driver.driver);
1090 return res;
1091
1092}
1093
1094static void __exit aem_exit(void)
1095{
1096 struct aem_data *p1, *next1;
1097
1098 ipmi_smi_watcher_unregister(&driver_data.bmc_events);
1099 driver_unregister(&aem_driver.driver);
1100 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
1101 aem_delete(p1);
1102}
1103
1104MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1105MODULE_DESCRIPTION("IBM AEM power/temp/energy sensor driver");
1106MODULE_LICENSE("GPL");
1107
1108module_init(aem_init);
1109module_exit(aem_exit);
1110
1111MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3350-*");
1112MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3550-*");
1113MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3650-*");
1114MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3655-*");
1115MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3755-*");
1116MODULE_ALIAS("dmi:bvnIBM:*:pnIBM3850M2/x3950M2-*");
1117MODULE_ALIAS("dmi:bvnIBM:*:pnIBMBladeHC10-*");