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1da177e4 LT |
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 | */ | |
77cf3973 | 34 | #include <linux/config.h> |
1da177e4 | 35 | #include <linux/module.h> |
3b625943 CM |
36 | #include <linux/moduleparam.h> |
37 | #include <linux/proc_fs.h> | |
1da177e4 | 38 | #include <linux/string.h> |
77cf3973 CM |
39 | #include <linux/completion.h> |
40 | #include <linux/kdev_t.h> | |
1da177e4 LT |
41 | #include <linux/ipmi.h> |
42 | #include <linux/ipmi_smi.h> | |
43 | ||
44 | #define PFX "IPMI poweroff: " | |
1da177e4 LT |
45 | |
46 | /* Where to we insert our poweroff function? */ | |
47 | extern void (*pm_power_off)(void); | |
48 | ||
3b625943 CM |
49 | /* Definitions for controlling power off (if the system supports it). It |
50 | * conveniently matches the IPMI chassis control values. */ | |
51 | #define IPMI_CHASSIS_POWER_DOWN 0 /* power down, the default. */ | |
52 | #define IPMI_CHASSIS_POWER_CYCLE 0x02 /* power cycle */ | |
53 | ||
54 | /* the IPMI data command */ | |
55 | static int poweroff_control = IPMI_CHASSIS_POWER_DOWN; | |
56 | ||
57 | /* parameter definition to allow user to flag power cycle */ | |
58 | module_param(poweroff_control, int, IPMI_CHASSIS_POWER_DOWN); | |
59 | MODULE_PARM_DESC(poweroff_control, " Set to 2 to enable power cycle instead of power down. Power cycle is contingent on hardware support, otherwise it defaults back to power down."); | |
60 | ||
1da177e4 LT |
61 | /* Stuff from the get device id command. */ |
62 | static unsigned int mfg_id; | |
63 | static unsigned int prod_id; | |
64 | static unsigned char capabilities; | |
168524d6 | 65 | static unsigned char ipmi_version; |
1da177e4 LT |
66 | |
67 | /* We use our own messages for this operation, we don't let the system | |
68 | allocate them, since we may be in a panic situation. The whole | |
69 | thing is single-threaded, anyway, so multiple messages are not | |
70 | required. */ | |
71 | static void dummy_smi_free(struct ipmi_smi_msg *msg) | |
72 | { | |
73 | } | |
74 | static void dummy_recv_free(struct ipmi_recv_msg *msg) | |
75 | { | |
76 | } | |
77 | static struct ipmi_smi_msg halt_smi_msg = | |
78 | { | |
79 | .done = dummy_smi_free | |
80 | }; | |
81 | static struct ipmi_recv_msg halt_recv_msg = | |
82 | { | |
83 | .done = dummy_recv_free | |
84 | }; | |
85 | ||
86 | ||
87 | /* | |
88 | * Code to send a message and wait for the reponse. | |
89 | */ | |
90 | ||
91 | static void receive_handler(struct ipmi_recv_msg *recv_msg, void *handler_data) | |
92 | { | |
77cf3973 | 93 | struct completion *comp = recv_msg->user_msg_data; |
1da177e4 | 94 | |
77cf3973 CM |
95 | if (comp) |
96 | complete(comp); | |
1da177e4 LT |
97 | } |
98 | ||
99 | static struct ipmi_user_hndl ipmi_poweroff_handler = | |
100 | { | |
101 | .ipmi_recv_hndl = receive_handler | |
102 | }; | |
103 | ||
104 | ||
105 | static int ipmi_request_wait_for_response(ipmi_user_t user, | |
106 | struct ipmi_addr *addr, | |
107 | struct kernel_ipmi_msg *send_msg) | |
108 | { | |
77cf3973 CM |
109 | int rv; |
110 | struct completion comp; | |
1da177e4 | 111 | |
77cf3973 | 112 | init_completion(&comp); |
1da177e4 | 113 | |
77cf3973 | 114 | rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, &comp, |
1da177e4 LT |
115 | &halt_smi_msg, &halt_recv_msg, 0); |
116 | if (rv) | |
117 | return rv; | |
118 | ||
77cf3973 | 119 | wait_for_completion(&comp); |
1da177e4 LT |
120 | |
121 | return halt_recv_msg.msg.data[0]; | |
122 | } | |
123 | ||
77cf3973 | 124 | /* We are in run-to-completion mode, no completion is desired. */ |
1da177e4 LT |
125 | static int ipmi_request_in_rc_mode(ipmi_user_t user, |
126 | struct ipmi_addr *addr, | |
127 | struct kernel_ipmi_msg *send_msg) | |
128 | { | |
77cf3973 | 129 | int rv; |
1da177e4 LT |
130 | |
131 | rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, NULL, | |
132 | &halt_smi_msg, &halt_recv_msg, 0); | |
133 | if (rv) | |
134 | return rv; | |
135 | ||
136 | return halt_recv_msg.msg.data[0]; | |
137 | } | |
138 | ||
139 | /* | |
140 | * ATCA Support | |
141 | */ | |
142 | ||
143 | #define IPMI_NETFN_ATCA 0x2c | |
144 | #define IPMI_ATCA_SET_POWER_CMD 0x11 | |
145 | #define IPMI_ATCA_GET_ADDR_INFO_CMD 0x01 | |
146 | #define IPMI_PICMG_ID 0 | |
147 | ||
148 | static int ipmi_atca_detect (ipmi_user_t user) | |
149 | { | |
150 | struct ipmi_system_interface_addr smi_addr; | |
151 | struct kernel_ipmi_msg send_msg; | |
152 | int rv; | |
153 | unsigned char data[1]; | |
154 | ||
155 | /* | |
156 | * Configure IPMI address for local access | |
157 | */ | |
158 | smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
159 | smi_addr.channel = IPMI_BMC_CHANNEL; | |
160 | smi_addr.lun = 0; | |
161 | ||
162 | /* | |
163 | * Use get address info to check and see if we are ATCA | |
164 | */ | |
165 | send_msg.netfn = IPMI_NETFN_ATCA; | |
166 | send_msg.cmd = IPMI_ATCA_GET_ADDR_INFO_CMD; | |
167 | data[0] = IPMI_PICMG_ID; | |
168 | send_msg.data = data; | |
169 | send_msg.data_len = sizeof(data); | |
170 | rv = ipmi_request_wait_for_response(user, | |
171 | (struct ipmi_addr *) &smi_addr, | |
172 | &send_msg); | |
173 | return !rv; | |
174 | } | |
175 | ||
176 | static void ipmi_poweroff_atca (ipmi_user_t user) | |
177 | { | |
178 | struct ipmi_system_interface_addr smi_addr; | |
179 | struct kernel_ipmi_msg send_msg; | |
180 | int rv; | |
181 | unsigned char data[4]; | |
182 | ||
183 | /* | |
184 | * Configure IPMI address for local access | |
185 | */ | |
186 | smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
187 | smi_addr.channel = IPMI_BMC_CHANNEL; | |
188 | smi_addr.lun = 0; | |
189 | ||
190 | printk(KERN_INFO PFX "Powering down via ATCA power command\n"); | |
191 | ||
192 | /* | |
193 | * Power down | |
194 | */ | |
195 | send_msg.netfn = IPMI_NETFN_ATCA; | |
196 | send_msg.cmd = IPMI_ATCA_SET_POWER_CMD; | |
197 | data[0] = IPMI_PICMG_ID; | |
198 | data[1] = 0; /* FRU id */ | |
199 | data[2] = 0; /* Power Level */ | |
200 | data[3] = 0; /* Don't change saved presets */ | |
201 | send_msg.data = data; | |
202 | send_msg.data_len = sizeof (data); | |
203 | rv = ipmi_request_in_rc_mode(user, | |
204 | (struct ipmi_addr *) &smi_addr, | |
205 | &send_msg); | |
206 | if (rv) { | |
207 | printk(KERN_ERR PFX "Unable to send ATCA powerdown message," | |
208 | " IPMI error 0x%x\n", rv); | |
209 | goto out; | |
210 | } | |
211 | ||
212 | out: | |
213 | return; | |
214 | } | |
215 | ||
216 | /* | |
217 | * CPI1 Support | |
218 | */ | |
219 | ||
220 | #define IPMI_NETFN_OEM_1 0xf8 | |
221 | #define OEM_GRP_CMD_SET_RESET_STATE 0x84 | |
222 | #define OEM_GRP_CMD_SET_POWER_STATE 0x82 | |
223 | #define IPMI_NETFN_OEM_8 0xf8 | |
224 | #define OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL 0x80 | |
225 | #define OEM_GRP_CMD_GET_SLOT_GA 0xa3 | |
226 | #define IPMI_NETFN_SENSOR_EVT 0x10 | |
227 | #define IPMI_CMD_GET_EVENT_RECEIVER 0x01 | |
228 | ||
229 | #define IPMI_CPI1_PRODUCT_ID 0x000157 | |
230 | #define IPMI_CPI1_MANUFACTURER_ID 0x0108 | |
231 | ||
232 | static int ipmi_cpi1_detect (ipmi_user_t user) | |
233 | { | |
234 | return ((mfg_id == IPMI_CPI1_MANUFACTURER_ID) | |
235 | && (prod_id == IPMI_CPI1_PRODUCT_ID)); | |
236 | } | |
237 | ||
238 | static void ipmi_poweroff_cpi1 (ipmi_user_t user) | |
239 | { | |
240 | struct ipmi_system_interface_addr smi_addr; | |
241 | struct ipmi_ipmb_addr ipmb_addr; | |
242 | struct kernel_ipmi_msg send_msg; | |
243 | int rv; | |
244 | unsigned char data[1]; | |
245 | int slot; | |
246 | unsigned char hotswap_ipmb; | |
247 | unsigned char aer_addr; | |
248 | unsigned char aer_lun; | |
249 | ||
250 | /* | |
251 | * Configure IPMI address for local access | |
252 | */ | |
253 | smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
254 | smi_addr.channel = IPMI_BMC_CHANNEL; | |
255 | smi_addr.lun = 0; | |
256 | ||
257 | printk(KERN_INFO PFX "Powering down via CPI1 power command\n"); | |
258 | ||
259 | /* | |
260 | * Get IPMI ipmb address | |
261 | */ | |
262 | send_msg.netfn = IPMI_NETFN_OEM_8 >> 2; | |
263 | send_msg.cmd = OEM_GRP_CMD_GET_SLOT_GA; | |
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 | slot = halt_recv_msg.msg.data[1]; | |
272 | hotswap_ipmb = (slot > 9) ? (0xb0 + 2 * slot) : (0xae + 2 * slot); | |
273 | ||
274 | /* | |
275 | * Get active event receiver | |
276 | */ | |
277 | send_msg.netfn = IPMI_NETFN_SENSOR_EVT >> 2; | |
278 | send_msg.cmd = IPMI_CMD_GET_EVENT_RECEIVER; | |
279 | send_msg.data = NULL; | |
280 | send_msg.data_len = 0; | |
281 | rv = ipmi_request_in_rc_mode(user, | |
282 | (struct ipmi_addr *) &smi_addr, | |
283 | &send_msg); | |
284 | if (rv) | |
285 | goto out; | |
286 | aer_addr = halt_recv_msg.msg.data[1]; | |
287 | aer_lun = halt_recv_msg.msg.data[2]; | |
288 | ||
289 | /* | |
290 | * Setup IPMB address target instead of local target | |
291 | */ | |
292 | ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE; | |
293 | ipmb_addr.channel = 0; | |
294 | ipmb_addr.slave_addr = aer_addr; | |
295 | ipmb_addr.lun = aer_lun; | |
296 | ||
297 | /* | |
298 | * Send request hotswap control to remove blade from dpv | |
299 | */ | |
300 | send_msg.netfn = IPMI_NETFN_OEM_8 >> 2; | |
301 | send_msg.cmd = OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL; | |
302 | send_msg.data = &hotswap_ipmb; | |
303 | send_msg.data_len = 1; | |
304 | ipmi_request_in_rc_mode(user, | |
305 | (struct ipmi_addr *) &ipmb_addr, | |
306 | &send_msg); | |
307 | ||
308 | /* | |
309 | * Set reset asserted | |
310 | */ | |
311 | send_msg.netfn = IPMI_NETFN_OEM_1 >> 2; | |
312 | send_msg.cmd = OEM_GRP_CMD_SET_RESET_STATE; | |
313 | send_msg.data = data; | |
314 | data[0] = 1; /* Reset asserted state */ | |
315 | send_msg.data_len = 1; | |
316 | rv = ipmi_request_in_rc_mode(user, | |
317 | (struct ipmi_addr *) &smi_addr, | |
318 | &send_msg); | |
319 | if (rv) | |
320 | goto out; | |
321 | ||
322 | /* | |
323 | * Power down | |
324 | */ | |
325 | send_msg.netfn = IPMI_NETFN_OEM_1 >> 2; | |
326 | send_msg.cmd = OEM_GRP_CMD_SET_POWER_STATE; | |
327 | send_msg.data = data; | |
328 | data[0] = 1; /* Power down state */ | |
329 | send_msg.data_len = 1; | |
330 | rv = ipmi_request_in_rc_mode(user, | |
331 | (struct ipmi_addr *) &smi_addr, | |
332 | &send_msg); | |
333 | if (rv) | |
334 | goto out; | |
335 | ||
336 | out: | |
337 | return; | |
338 | } | |
339 | ||
168524d6 CM |
340 | /* |
341 | * ipmi_dell_chassis_detect() | |
342 | * Dell systems with IPMI < 1.5 don't set the chassis capability bit | |
343 | * but they can handle a chassis poweroff or powercycle command. | |
344 | */ | |
345 | ||
346 | #define DELL_IANA_MFR_ID {0xA2, 0x02, 0x00} | |
347 | static int ipmi_dell_chassis_detect (ipmi_user_t user) | |
348 | { | |
349 | const char ipmi_version_major = ipmi_version & 0xF; | |
350 | const char ipmi_version_minor = (ipmi_version >> 4) & 0xF; | |
351 | const char mfr[3]=DELL_IANA_MFR_ID; | |
352 | if (!memcmp(mfr, &mfg_id, sizeof(mfr)) && | |
353 | ipmi_version_major <= 1 && | |
354 | ipmi_version_minor < 5) | |
355 | return 1; | |
356 | return 0; | |
357 | } | |
358 | ||
1da177e4 LT |
359 | /* |
360 | * Standard chassis support | |
361 | */ | |
362 | ||
363 | #define IPMI_NETFN_CHASSIS_REQUEST 0 | |
364 | #define IPMI_CHASSIS_CONTROL_CMD 0x02 | |
365 | ||
366 | static int ipmi_chassis_detect (ipmi_user_t user) | |
367 | { | |
368 | /* Chassis support, use it. */ | |
369 | return (capabilities & 0x80); | |
370 | } | |
371 | ||
372 | static void ipmi_poweroff_chassis (ipmi_user_t user) | |
373 | { | |
374 | struct ipmi_system_interface_addr smi_addr; | |
375 | struct kernel_ipmi_msg send_msg; | |
376 | int rv; | |
377 | unsigned char data[1]; | |
378 | ||
379 | /* | |
380 | * Configure IPMI address for local access | |
381 | */ | |
382 | smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
383 | smi_addr.channel = IPMI_BMC_CHANNEL; | |
384 | smi_addr.lun = 0; | |
385 | ||
3b625943 CM |
386 | powercyclefailed: |
387 | printk(KERN_INFO PFX "Powering %s via IPMI chassis control command\n", | |
388 | ((poweroff_control != IPMI_CHASSIS_POWER_CYCLE) ? "down" : "cycle")); | |
1da177e4 LT |
389 | |
390 | /* | |
391 | * Power down | |
392 | */ | |
393 | send_msg.netfn = IPMI_NETFN_CHASSIS_REQUEST; | |
394 | send_msg.cmd = IPMI_CHASSIS_CONTROL_CMD; | |
3b625943 | 395 | data[0] = poweroff_control; |
1da177e4 LT |
396 | send_msg.data = data; |
397 | send_msg.data_len = sizeof(data); | |
398 | rv = ipmi_request_in_rc_mode(user, | |
399 | (struct ipmi_addr *) &smi_addr, | |
400 | &send_msg); | |
401 | if (rv) { | |
3b625943 CM |
402 | switch (poweroff_control) { |
403 | case IPMI_CHASSIS_POWER_CYCLE: | |
404 | /* power cycle failed, default to power down */ | |
405 | printk(KERN_ERR PFX "Unable to send chassis power " \ | |
406 | "cycle message, IPMI error 0x%x\n", rv); | |
407 | poweroff_control = IPMI_CHASSIS_POWER_DOWN; | |
408 | goto powercyclefailed; | |
409 | ||
410 | case IPMI_CHASSIS_POWER_DOWN: | |
411 | default: | |
412 | printk(KERN_ERR PFX "Unable to send chassis power " \ | |
413 | "down message, IPMI error 0x%x\n", rv); | |
414 | break; | |
415 | } | |
1da177e4 LT |
416 | } |
417 | ||
1da177e4 LT |
418 | return; |
419 | } | |
420 | ||
421 | ||
422 | /* Table of possible power off functions. */ | |
423 | struct poweroff_function { | |
424 | char *platform_type; | |
425 | int (*detect)(ipmi_user_t user); | |
426 | void (*poweroff_func)(ipmi_user_t user); | |
427 | }; | |
428 | ||
429 | static struct poweroff_function poweroff_functions[] = { | |
430 | { .platform_type = "ATCA", | |
431 | .detect = ipmi_atca_detect, | |
432 | .poweroff_func = ipmi_poweroff_atca }, | |
433 | { .platform_type = "CPI1", | |
434 | .detect = ipmi_cpi1_detect, | |
435 | .poweroff_func = ipmi_poweroff_cpi1 }, | |
168524d6 CM |
436 | { .platform_type = "chassis", |
437 | .detect = ipmi_dell_chassis_detect, | |
438 | .poweroff_func = ipmi_poweroff_chassis }, | |
1da177e4 LT |
439 | /* Chassis should generally be last, other things should override |
440 | it. */ | |
441 | { .platform_type = "chassis", | |
442 | .detect = ipmi_chassis_detect, | |
443 | .poweroff_func = ipmi_poweroff_chassis }, | |
444 | }; | |
445 | #define NUM_PO_FUNCS (sizeof(poweroff_functions) \ | |
446 | / sizeof(struct poweroff_function)) | |
447 | ||
448 | ||
449 | /* Our local state. */ | |
450 | static int ready = 0; | |
451 | static ipmi_user_t ipmi_user; | |
452 | static void (*specific_poweroff_func)(ipmi_user_t user) = NULL; | |
453 | ||
454 | /* Holds the old poweroff function so we can restore it on removal. */ | |
455 | static void (*old_poweroff_func)(void); | |
456 | ||
457 | ||
458 | /* Called on a powerdown request. */ | |
459 | static void ipmi_poweroff_function (void) | |
460 | { | |
461 | if (!ready) | |
462 | return; | |
463 | ||
464 | /* Use run-to-completion mode, since interrupts may be off. */ | |
465 | ipmi_user_set_run_to_completion(ipmi_user, 1); | |
466 | specific_poweroff_func(ipmi_user); | |
467 | ipmi_user_set_run_to_completion(ipmi_user, 0); | |
468 | } | |
469 | ||
470 | /* Wait for an IPMI interface to be installed, the first one installed | |
471 | will be grabbed by this code and used to perform the powerdown. */ | |
472 | static void ipmi_po_new_smi(int if_num) | |
473 | { | |
474 | struct ipmi_system_interface_addr smi_addr; | |
475 | struct kernel_ipmi_msg send_msg; | |
476 | int rv; | |
477 | int i; | |
478 | ||
479 | if (ready) | |
480 | return; | |
481 | ||
3b625943 CM |
482 | rv = ipmi_create_user(if_num, &ipmi_poweroff_handler, NULL, |
483 | &ipmi_user); | |
1da177e4 LT |
484 | if (rv) { |
485 | printk(KERN_ERR PFX "could not create IPMI user, error %d\n", | |
486 | rv); | |
487 | return; | |
488 | } | |
489 | ||
490 | /* | |
491 | * Do a get device ide and store some results, since this is | |
492 | * used by several functions. | |
493 | */ | |
494 | smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE; | |
495 | smi_addr.channel = IPMI_BMC_CHANNEL; | |
496 | smi_addr.lun = 0; | |
497 | ||
498 | send_msg.netfn = IPMI_NETFN_APP_REQUEST; | |
499 | send_msg.cmd = IPMI_GET_DEVICE_ID_CMD; | |
500 | send_msg.data = NULL; | |
501 | send_msg.data_len = 0; | |
502 | rv = ipmi_request_wait_for_response(ipmi_user, | |
503 | (struct ipmi_addr *) &smi_addr, | |
504 | &send_msg); | |
505 | if (rv) { | |
506 | printk(KERN_ERR PFX "Unable to send IPMI get device id info," | |
507 | " IPMI error 0x%x\n", rv); | |
508 | goto out_err; | |
509 | } | |
510 | ||
511 | if (halt_recv_msg.msg.data_len < 12) { | |
512 | printk(KERN_ERR PFX "(chassis) IPMI get device id info too," | |
513 | " short, was %d bytes, needed %d bytes\n", | |
514 | halt_recv_msg.msg.data_len, 12); | |
515 | goto out_err; | |
516 | } | |
517 | ||
518 | mfg_id = (halt_recv_msg.msg.data[7] | |
519 | | (halt_recv_msg.msg.data[8] << 8) | |
520 | | (halt_recv_msg.msg.data[9] << 16)); | |
521 | prod_id = (halt_recv_msg.msg.data[10] | |
522 | | (halt_recv_msg.msg.data[11] << 8)); | |
523 | capabilities = halt_recv_msg.msg.data[6]; | |
168524d6 | 524 | ipmi_version = halt_recv_msg.msg.data[5]; |
1da177e4 LT |
525 | |
526 | ||
527 | /* Scan for a poweroff method */ | |
e8b33617 | 528 | for (i = 0; i < NUM_PO_FUNCS; i++) { |
1da177e4 LT |
529 | if (poweroff_functions[i].detect(ipmi_user)) |
530 | goto found; | |
531 | } | |
532 | ||
533 | out_err: | |
534 | printk(KERN_ERR PFX "Unable to find a poweroff function that" | |
535 | " will work, giving up\n"); | |
536 | ipmi_destroy_user(ipmi_user); | |
537 | return; | |
538 | ||
539 | found: | |
540 | printk(KERN_INFO PFX "Found a %s style poweroff function\n", | |
541 | poweroff_functions[i].platform_type); | |
542 | specific_poweroff_func = poweroff_functions[i].poweroff_func; | |
543 | old_poweroff_func = pm_power_off; | |
544 | pm_power_off = ipmi_poweroff_function; | |
545 | ready = 1; | |
546 | } | |
547 | ||
548 | static void ipmi_po_smi_gone(int if_num) | |
549 | { | |
550 | /* This can never be called, because once poweroff driver is | |
551 | registered, the interface can't go away until the power | |
552 | driver is unregistered. */ | |
553 | } | |
554 | ||
555 | static struct ipmi_smi_watcher smi_watcher = | |
556 | { | |
557 | .owner = THIS_MODULE, | |
558 | .new_smi = ipmi_po_new_smi, | |
559 | .smi_gone = ipmi_po_smi_gone | |
560 | }; | |
561 | ||
562 | ||
3b625943 CM |
563 | #ifdef CONFIG_PROC_FS |
564 | /* displays properties to proc */ | |
565 | static int proc_read_chassctrl(char *page, char **start, off_t off, int count, | |
566 | int *eof, void *data) | |
567 | { | |
568 | return sprintf(page, "%d\t[ 0=powerdown 2=powercycle ]\n", | |
569 | poweroff_control); | |
570 | } | |
571 | ||
572 | /* process property writes from proc */ | |
573 | static int proc_write_chassctrl(struct file *file, const char *buffer, | |
574 | unsigned long count, void *data) | |
575 | { | |
576 | int rv = count; | |
577 | unsigned int newval = 0; | |
578 | ||
579 | sscanf(buffer, "%d", &newval); | |
580 | switch (newval) { | |
581 | case IPMI_CHASSIS_POWER_CYCLE: | |
582 | printk(KERN_INFO PFX "power cycle is now enabled\n"); | |
583 | poweroff_control = newval; | |
584 | break; | |
585 | ||
586 | case IPMI_CHASSIS_POWER_DOWN: | |
587 | poweroff_control = IPMI_CHASSIS_POWER_DOWN; | |
588 | break; | |
589 | ||
590 | default: | |
591 | rv = -EINVAL; | |
592 | break; | |
593 | } | |
594 | ||
595 | return rv; | |
596 | } | |
597 | #endif /* CONFIG_PROC_FS */ | |
598 | ||
1da177e4 LT |
599 | /* |
600 | * Startup and shutdown functions. | |
601 | */ | |
602 | static int ipmi_poweroff_init (void) | |
603 | { | |
3b625943 CM |
604 | int rv; |
605 | struct proc_dir_entry *file; | |
1da177e4 LT |
606 | |
607 | printk ("Copyright (C) 2004 MontaVista Software -" | |
1fdd75bd | 608 | " IPMI Powerdown via sys_reboot.\n"); |
1da177e4 | 609 | |
3b625943 CM |
610 | switch (poweroff_control) { |
611 | case IPMI_CHASSIS_POWER_CYCLE: | |
612 | printk(KERN_INFO PFX "Power cycle is enabled.\n"); | |
613 | break; | |
614 | ||
615 | case IPMI_CHASSIS_POWER_DOWN: | |
616 | default: | |
617 | poweroff_control = IPMI_CHASSIS_POWER_DOWN; | |
618 | break; | |
619 | } | |
620 | ||
1da177e4 | 621 | rv = ipmi_smi_watcher_register(&smi_watcher); |
3b625943 | 622 | if (rv) { |
1da177e4 | 623 | printk(KERN_ERR PFX "Unable to register SMI watcher: %d\n", rv); |
3b625943 CM |
624 | goto out_err; |
625 | } | |
626 | ||
627 | #ifdef CONFIG_PROC_FS | |
628 | file = create_proc_entry("poweroff_control", 0, proc_ipmi_root); | |
629 | if (!file) { | |
630 | printk(KERN_ERR PFX "Unable to create proc power control\n"); | |
631 | } else { | |
632 | file->nlink = 1; | |
633 | file->read_proc = proc_read_chassctrl; | |
634 | file->write_proc = proc_write_chassctrl; | |
635 | file->owner = THIS_MODULE; | |
636 | } | |
637 | #endif | |
1da177e4 | 638 | |
3b625943 | 639 | out_err: |
1da177e4 LT |
640 | return rv; |
641 | } | |
642 | ||
643 | #ifdef MODULE | |
644 | static __exit void ipmi_poweroff_cleanup(void) | |
645 | { | |
646 | int rv; | |
647 | ||
3b625943 CM |
648 | #ifdef CONFIG_PROC_FS |
649 | remove_proc_entry("poweroff_control", proc_ipmi_root); | |
650 | #endif | |
651 | ||
1da177e4 LT |
652 | ipmi_smi_watcher_unregister(&smi_watcher); |
653 | ||
654 | if (ready) { | |
655 | rv = ipmi_destroy_user(ipmi_user); | |
656 | if (rv) | |
657 | printk(KERN_ERR PFX "could not cleanup the IPMI" | |
658 | " user: 0x%x\n", rv); | |
659 | pm_power_off = old_poweroff_func; | |
660 | } | |
661 | } | |
662 | module_exit(ipmi_poweroff_cleanup); | |
663 | #endif | |
664 | ||
665 | module_init(ipmi_poweroff_init); | |
666 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
667 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
668 | MODULE_DESCRIPTION("IPMI Poweroff extension to sys_reboot"); |