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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/ipmi/ipmi_poweroff.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/char/ipmi/ipmi_poweroff.c')
-rw-r--r--drivers/char/ipmi/ipmi_poweroff.c549
1 files changed, 549 insertions, 0 deletions
diff --git a/drivers/char/ipmi/ipmi_poweroff.c b/drivers/char/ipmi/ipmi_poweroff.c
new file mode 100644
index 00000000000..cb5cdc6f14b
--- /dev/null
+++ b/drivers/char/ipmi/ipmi_poweroff.c
@@ -0,0 +1,549 @@
1/*
2 * ipmi_poweroff.c
3 *
4 * MontaVista IPMI Poweroff extension to sys_reboot
5 *
6 * Author: MontaVista Software, Inc.
7 * Steven Dake <sdake@mvista.com>
8 * Corey Minyard <cminyard@mvista.com>
9 * source@mvista.com
10 *
11 * Copyright 2002,2004 MontaVista Software Inc.
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 *
19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
27 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
28 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * You should have received a copy of the GNU General Public License along
31 * with this program; if not, write to the Free Software Foundation, Inc.,
32 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 */
34#include <asm/semaphore.h>
35#include <linux/kdev_t.h>
36#include <linux/module.h>
37#include <linux/string.h>
38#include <linux/ipmi.h>
39#include <linux/ipmi_smi.h>
40
41#define PFX "IPMI poweroff: "
42#define IPMI_POWEROFF_VERSION "v33"
43
44/* Where to we insert our poweroff function? */
45extern void (*pm_power_off)(void);
46
47/* Stuff from the get device id command. */
48static unsigned int mfg_id;
49static unsigned int prod_id;
50static unsigned char capabilities;
51
52/* We use our own messages for this operation, we don't let the system
53 allocate them, since we may be in a panic situation. The whole
54 thing is single-threaded, anyway, so multiple messages are not
55 required. */
56static void dummy_smi_free(struct ipmi_smi_msg *msg)
57{
58}
59static void dummy_recv_free(struct ipmi_recv_msg *msg)
60{
61}
62static struct ipmi_smi_msg halt_smi_msg =
63{
64 .done = dummy_smi_free
65};
66static struct ipmi_recv_msg halt_recv_msg =
67{
68 .done = dummy_recv_free
69};
70
71
72/*
73 * Code to send a message and wait for the reponse.
74 */
75
76static void receive_handler(struct ipmi_recv_msg *recv_msg, void *handler_data)
77{
78 struct semaphore *sem = recv_msg->user_msg_data;
79
80 if (sem)
81 up(sem);
82}
83
84static struct ipmi_user_hndl ipmi_poweroff_handler =
85{
86 .ipmi_recv_hndl = receive_handler
87};
88
89
90static int ipmi_request_wait_for_response(ipmi_user_t user,
91 struct ipmi_addr *addr,
92 struct kernel_ipmi_msg *send_msg)
93{
94 int rv;
95 struct semaphore sem;
96
97 sema_init (&sem, 0);
98
99 rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, &sem,
100 &halt_smi_msg, &halt_recv_msg, 0);
101 if (rv)
102 return rv;
103
104 down (&sem);
105
106 return halt_recv_msg.msg.data[0];
107}
108
109/* We are in run-to-completion mode, no semaphore is desired. */
110static int ipmi_request_in_rc_mode(ipmi_user_t user,
111 struct ipmi_addr *addr,
112 struct kernel_ipmi_msg *send_msg)
113{
114 int rv;
115
116 rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, NULL,
117 &halt_smi_msg, &halt_recv_msg, 0);
118 if (rv)
119 return rv;
120
121 return halt_recv_msg.msg.data[0];
122}
123
124/*
125 * ATCA Support
126 */
127
128#define IPMI_NETFN_ATCA 0x2c
129#define IPMI_ATCA_SET_POWER_CMD 0x11
130#define IPMI_ATCA_GET_ADDR_INFO_CMD 0x01
131#define IPMI_PICMG_ID 0
132
133static int ipmi_atca_detect (ipmi_user_t user)
134{
135 struct ipmi_system_interface_addr smi_addr;
136 struct kernel_ipmi_msg send_msg;
137 int rv;
138 unsigned char data[1];
139
140 /*
141 * Configure IPMI address for local access
142 */
143 smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
144 smi_addr.channel = IPMI_BMC_CHANNEL;
145 smi_addr.lun = 0;
146
147 /*
148 * Use get address info to check and see if we are ATCA
149 */
150 send_msg.netfn = IPMI_NETFN_ATCA;
151 send_msg.cmd = IPMI_ATCA_GET_ADDR_INFO_CMD;
152 data[0] = IPMI_PICMG_ID;
153 send_msg.data = data;
154 send_msg.data_len = sizeof(data);
155 rv = ipmi_request_wait_for_response(user,
156 (struct ipmi_addr *) &smi_addr,
157 &send_msg);
158 return !rv;
159}
160
161static void ipmi_poweroff_atca (ipmi_user_t user)
162{
163 struct ipmi_system_interface_addr smi_addr;
164 struct kernel_ipmi_msg send_msg;
165 int rv;
166 unsigned char data[4];
167
168 /*
169 * Configure IPMI address for local access
170 */
171 smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
172 smi_addr.channel = IPMI_BMC_CHANNEL;
173 smi_addr.lun = 0;
174
175 printk(KERN_INFO PFX "Powering down via ATCA power command\n");
176
177 /*
178 * Power down
179 */
180 send_msg.netfn = IPMI_NETFN_ATCA;
181 send_msg.cmd = IPMI_ATCA_SET_POWER_CMD;
182 data[0] = IPMI_PICMG_ID;
183 data[1] = 0; /* FRU id */
184 data[2] = 0; /* Power Level */
185 data[3] = 0; /* Don't change saved presets */
186 send_msg.data = data;
187 send_msg.data_len = sizeof (data);
188 rv = ipmi_request_in_rc_mode(user,
189 (struct ipmi_addr *) &smi_addr,
190 &send_msg);
191 if (rv) {
192 printk(KERN_ERR PFX "Unable to send ATCA powerdown message,"
193 " IPMI error 0x%x\n", rv);
194 goto out;
195 }
196
197 out:
198 return;
199}
200
201/*
202 * CPI1 Support
203 */
204
205#define IPMI_NETFN_OEM_1 0xf8
206#define OEM_GRP_CMD_SET_RESET_STATE 0x84
207#define OEM_GRP_CMD_SET_POWER_STATE 0x82
208#define IPMI_NETFN_OEM_8 0xf8
209#define OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL 0x80
210#define OEM_GRP_CMD_GET_SLOT_GA 0xa3
211#define IPMI_NETFN_SENSOR_EVT 0x10
212#define IPMI_CMD_GET_EVENT_RECEIVER 0x01
213
214#define IPMI_CPI1_PRODUCT_ID 0x000157
215#define IPMI_CPI1_MANUFACTURER_ID 0x0108
216
217static int ipmi_cpi1_detect (ipmi_user_t user)
218{
219 return ((mfg_id == IPMI_CPI1_MANUFACTURER_ID)
220 && (prod_id == IPMI_CPI1_PRODUCT_ID));
221}
222
223static void ipmi_poweroff_cpi1 (ipmi_user_t user)
224{
225 struct ipmi_system_interface_addr smi_addr;
226 struct ipmi_ipmb_addr ipmb_addr;
227 struct kernel_ipmi_msg send_msg;
228 int rv;
229 unsigned char data[1];
230 int slot;
231 unsigned char hotswap_ipmb;
232 unsigned char aer_addr;
233 unsigned char aer_lun;
234
235 /*
236 * Configure IPMI address for local access
237 */
238 smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
239 smi_addr.channel = IPMI_BMC_CHANNEL;
240 smi_addr.lun = 0;
241
242 printk(KERN_INFO PFX "Powering down via CPI1 power command\n");
243
244 /*
245 * Get IPMI ipmb address
246 */
247 send_msg.netfn = IPMI_NETFN_OEM_8 >> 2;
248 send_msg.cmd = OEM_GRP_CMD_GET_SLOT_GA;
249 send_msg.data = NULL;
250 send_msg.data_len = 0;
251 rv = ipmi_request_in_rc_mode(user,
252 (struct ipmi_addr *) &smi_addr,
253 &send_msg);
254 if (rv)
255 goto out;
256 slot = halt_recv_msg.msg.data[1];
257 hotswap_ipmb = (slot > 9) ? (0xb0 + 2 * slot) : (0xae + 2 * slot);
258
259 /*
260 * Get active event receiver
261 */
262 send_msg.netfn = IPMI_NETFN_SENSOR_EVT >> 2;
263 send_msg.cmd = IPMI_CMD_GET_EVENT_RECEIVER;
264 send_msg.data = NULL;
265 send_msg.data_len = 0;
266 rv = ipmi_request_in_rc_mode(user,
267 (struct ipmi_addr *) &smi_addr,
268 &send_msg);
269 if (rv)
270 goto out;
271 aer_addr = halt_recv_msg.msg.data[1];
272 aer_lun = halt_recv_msg.msg.data[2];
273
274 /*
275 * Setup IPMB address target instead of local target
276 */
277 ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
278 ipmb_addr.channel = 0;
279 ipmb_addr.slave_addr = aer_addr;
280 ipmb_addr.lun = aer_lun;
281
282 /*
283 * Send request hotswap control to remove blade from dpv
284 */
285 send_msg.netfn = IPMI_NETFN_OEM_8 >> 2;
286 send_msg.cmd = OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL;
287 send_msg.data = &hotswap_ipmb;
288 send_msg.data_len = 1;
289 ipmi_request_in_rc_mode(user,
290 (struct ipmi_addr *) &ipmb_addr,
291 &send_msg);
292
293 /*
294 * Set reset asserted
295 */
296 send_msg.netfn = IPMI_NETFN_OEM_1 >> 2;
297 send_msg.cmd = OEM_GRP_CMD_SET_RESET_STATE;
298 send_msg.data = data;
299 data[0] = 1; /* Reset asserted state */
300 send_msg.data_len = 1;
301 rv = ipmi_request_in_rc_mode(user,
302 (struct ipmi_addr *) &smi_addr,
303 &send_msg);
304 if (rv)
305 goto out;
306
307 /*
308 * Power down
309 */
310 send_msg.netfn = IPMI_NETFN_OEM_1 >> 2;
311 send_msg.cmd = OEM_GRP_CMD_SET_POWER_STATE;
312 send_msg.data = data;
313 data[0] = 1; /* Power down state */
314 send_msg.data_len = 1;
315 rv = ipmi_request_in_rc_mode(user,
316 (struct ipmi_addr *) &smi_addr,
317 &send_msg);
318 if (rv)
319 goto out;
320
321 out:
322 return;
323}
324
325/*
326 * Standard chassis support
327 */
328
329#define IPMI_NETFN_CHASSIS_REQUEST 0
330#define IPMI_CHASSIS_CONTROL_CMD 0x02
331
332static int ipmi_chassis_detect (ipmi_user_t user)
333{
334 /* Chassis support, use it. */
335 return (capabilities & 0x80);
336}
337
338static void ipmi_poweroff_chassis (ipmi_user_t user)
339{
340 struct ipmi_system_interface_addr smi_addr;
341 struct kernel_ipmi_msg send_msg;
342 int rv;
343 unsigned char data[1];
344
345 /*
346 * Configure IPMI address for local access
347 */
348 smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
349 smi_addr.channel = IPMI_BMC_CHANNEL;
350 smi_addr.lun = 0;
351
352 printk(KERN_INFO PFX "Powering down via IPMI chassis control command\n");
353
354 /*
355 * Power down
356 */
357 send_msg.netfn = IPMI_NETFN_CHASSIS_REQUEST;
358 send_msg.cmd = IPMI_CHASSIS_CONTROL_CMD;
359 data[0] = 0; /* Power down */
360 send_msg.data = data;
361 send_msg.data_len = sizeof(data);
362 rv = ipmi_request_in_rc_mode(user,
363 (struct ipmi_addr *) &smi_addr,
364 &send_msg);
365 if (rv) {
366 printk(KERN_ERR PFX "Unable to send chassis powerdown message,"
367 " IPMI error 0x%x\n", rv);
368 goto out;
369 }
370
371 out:
372 return;
373}
374
375
376/* Table of possible power off functions. */
377struct poweroff_function {
378 char *platform_type;
379 int (*detect)(ipmi_user_t user);
380 void (*poweroff_func)(ipmi_user_t user);
381};
382
383static struct poweroff_function poweroff_functions[] = {
384 { .platform_type = "ATCA",
385 .detect = ipmi_atca_detect,
386 .poweroff_func = ipmi_poweroff_atca },
387 { .platform_type = "CPI1",
388 .detect = ipmi_cpi1_detect,
389 .poweroff_func = ipmi_poweroff_cpi1 },
390 /* Chassis should generally be last, other things should override
391 it. */
392 { .platform_type = "chassis",
393 .detect = ipmi_chassis_detect,
394 .poweroff_func = ipmi_poweroff_chassis },
395};
396#define NUM_PO_FUNCS (sizeof(poweroff_functions) \
397 / sizeof(struct poweroff_function))
398
399
400/* Our local state. */
401static int ready = 0;
402static ipmi_user_t ipmi_user;
403static void (*specific_poweroff_func)(ipmi_user_t user) = NULL;
404
405/* Holds the old poweroff function so we can restore it on removal. */
406static void (*old_poweroff_func)(void);
407
408
409/* Called on a powerdown request. */
410static void ipmi_poweroff_function (void)
411{
412 if (!ready)
413 return;
414
415 /* Use run-to-completion mode, since interrupts may be off. */
416 ipmi_user_set_run_to_completion(ipmi_user, 1);
417 specific_poweroff_func(ipmi_user);
418 ipmi_user_set_run_to_completion(ipmi_user, 0);
419}
420
421/* Wait for an IPMI interface to be installed, the first one installed
422 will be grabbed by this code and used to perform the powerdown. */
423static void ipmi_po_new_smi(int if_num)
424{
425 struct ipmi_system_interface_addr smi_addr;
426 struct kernel_ipmi_msg send_msg;
427 int rv;
428 int i;
429
430 if (ready)
431 return;
432
433 rv = ipmi_create_user(if_num, &ipmi_poweroff_handler, NULL, &ipmi_user);
434 if (rv) {
435 printk(KERN_ERR PFX "could not create IPMI user, error %d\n",
436 rv);
437 return;
438 }
439
440 /*
441 * Do a get device ide and store some results, since this is
442 * used by several functions.
443 */
444 smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
445 smi_addr.channel = IPMI_BMC_CHANNEL;
446 smi_addr.lun = 0;
447
448 send_msg.netfn = IPMI_NETFN_APP_REQUEST;
449 send_msg.cmd = IPMI_GET_DEVICE_ID_CMD;
450 send_msg.data = NULL;
451 send_msg.data_len = 0;
452 rv = ipmi_request_wait_for_response(ipmi_user,
453 (struct ipmi_addr *) &smi_addr,
454 &send_msg);
455 if (rv) {
456 printk(KERN_ERR PFX "Unable to send IPMI get device id info,"
457 " IPMI error 0x%x\n", rv);
458 goto out_err;
459 }
460
461 if (halt_recv_msg.msg.data_len < 12) {
462 printk(KERN_ERR PFX "(chassis) IPMI get device id info too,"
463 " short, was %d bytes, needed %d bytes\n",
464 halt_recv_msg.msg.data_len, 12);
465 goto out_err;
466 }
467
468 mfg_id = (halt_recv_msg.msg.data[7]
469 | (halt_recv_msg.msg.data[8] << 8)
470 | (halt_recv_msg.msg.data[9] << 16));
471 prod_id = (halt_recv_msg.msg.data[10]
472 | (halt_recv_msg.msg.data[11] << 8));
473 capabilities = halt_recv_msg.msg.data[6];
474
475
476 /* Scan for a poweroff method */
477 for (i=0; i<NUM_PO_FUNCS; i++) {
478 if (poweroff_functions[i].detect(ipmi_user))
479 goto found;
480 }
481
482 out_err:
483 printk(KERN_ERR PFX "Unable to find a poweroff function that"
484 " will work, giving up\n");
485 ipmi_destroy_user(ipmi_user);
486 return;
487
488 found:
489 printk(KERN_INFO PFX "Found a %s style poweroff function\n",
490 poweroff_functions[i].platform_type);
491 specific_poweroff_func = poweroff_functions[i].poweroff_func;
492 old_poweroff_func = pm_power_off;
493 pm_power_off = ipmi_poweroff_function;
494 ready = 1;
495}
496
497static void ipmi_po_smi_gone(int if_num)
498{
499 /* This can never be called, because once poweroff driver is
500 registered, the interface can't go away until the power
501 driver is unregistered. */
502}
503
504static struct ipmi_smi_watcher smi_watcher =
505{
506 .owner = THIS_MODULE,
507 .new_smi = ipmi_po_new_smi,
508 .smi_gone = ipmi_po_smi_gone
509};
510
511
512/*
513 * Startup and shutdown functions.
514 */
515static int ipmi_poweroff_init (void)
516{
517 int rv;
518
519 printk ("Copyright (C) 2004 MontaVista Software -"
520 " IPMI Powerdown via sys_reboot version "
521 IPMI_POWEROFF_VERSION ".\n");
522
523 rv = ipmi_smi_watcher_register(&smi_watcher);
524 if (rv)
525 printk(KERN_ERR PFX "Unable to register SMI watcher: %d\n", rv);
526
527 return rv;
528}
529
530#ifdef MODULE
531static __exit void ipmi_poweroff_cleanup(void)
532{
533 int rv;
534
535 ipmi_smi_watcher_unregister(&smi_watcher);
536
537 if (ready) {
538 rv = ipmi_destroy_user(ipmi_user);
539 if (rv)
540 printk(KERN_ERR PFX "could not cleanup the IPMI"
541 " user: 0x%x\n", rv);
542 pm_power_off = old_poweroff_func;
543 }
544}
545module_exit(ipmi_poweroff_cleanup);
546#endif
547
548module_init(ipmi_poweroff_init);
549MODULE_LICENSE("GPL");