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1da177e4 LT |
1 | /* |
2 | * ipmi.h | |
3 | * | |
4 | * MontaVista IPMI interface | |
5 | * | |
6 | * Author: MontaVista Software, Inc. | |
7 | * Corey Minyard <minyard@mvista.com> | |
8 | * source@mvista.com | |
9 | * | |
10 | * Copyright 2002 MontaVista Software Inc. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | * | |
17 | * | |
18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
23 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
24 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
26 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
27 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28 | * | |
29 | * You should have received a copy of the GNU General Public License along | |
30 | * with this program; if not, write to the Free Software Foundation, Inc., | |
31 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
32 | */ | |
1da177e4 LT |
33 | #ifndef __LINUX_IPMI_H |
34 | #define __LINUX_IPMI_H | |
35 | ||
607ca46e | 36 | #include <uapi/linux/ipmi.h> |
1da177e4 | 37 | |
1da177e4 | 38 | #include <linux/list.h> |
3b625943 | 39 | #include <linux/proc_fs.h> |
a11213fc | 40 | #include <linux/acpi.h> /* For acpi_handle */ |
3b625943 | 41 | |
de477254 | 42 | struct module; |
313162d0 | 43 | struct device; |
de477254 | 44 | |
1da177e4 LT |
45 | /* Opaque type for a IPMI message user. One of these is needed to |
46 | send and receive messages. */ | |
47 | typedef struct ipmi_user *ipmi_user_t; | |
48 | ||
49 | /* | |
50 | * Stuff coming from the receive interface comes as one of these. | |
51 | * They are allocated, the receiver must free them with | |
52 | * ipmi_free_recv_msg() when done with the message. The link is not | |
53 | * used after the message is delivered, so the upper layer may use the | |
54 | * link to build a linked list, if it likes. | |
55 | */ | |
c70d7499 | 56 | struct ipmi_recv_msg { |
1da177e4 LT |
57 | struct list_head link; |
58 | ||
59 | /* The type of message as defined in the "Receive Types" | |
c70d7499 | 60 | defines above. */ |
1da177e4 LT |
61 | int recv_type; |
62 | ||
63 | ipmi_user_t user; | |
64 | struct ipmi_addr addr; | |
65 | long msgid; | |
66 | struct kernel_ipmi_msg msg; | |
67 | ||
68 | /* The user_msg_data is the data supplied when a message was | |
69 | sent, if this is a response to a sent message. If this is | |
70 | not a response to a sent message, then user_msg_data will | |
56a55ec6 CM |
71 | be NULL. If the user above is NULL, then this will be the |
72 | intf. */ | |
1da177e4 LT |
73 | void *user_msg_data; |
74 | ||
75 | /* Call this when done with the message. It will presumably free | |
76 | the message and do any other necessary cleanup. */ | |
77 | void (*done)(struct ipmi_recv_msg *msg); | |
78 | ||
79 | /* Place-holder for the data, don't make any assumptions about | |
25985edc | 80 | the size or existence of this, since it may change. */ |
1da177e4 LT |
81 | unsigned char msg_data[IPMI_MAX_MSG_LENGTH]; |
82 | }; | |
83 | ||
84 | /* Allocate and free the receive message. */ | |
393d2cc3 | 85 | void ipmi_free_recv_msg(struct ipmi_recv_msg *msg); |
1da177e4 | 86 | |
c70d7499 CM |
87 | struct ipmi_user_hndl { |
88 | /* Routine type to call when a message needs to be routed to | |
1da177e4 LT |
89 | the upper layer. This will be called with some locks held, |
90 | the only IPMI routines that can be called are ipmi_request | |
91 | and the alloc/free operations. The handler_data is the | |
92 | variable supplied when the receive handler was registered. */ | |
93 | void (*ipmi_recv_hndl)(struct ipmi_recv_msg *msg, | |
94 | void *user_msg_data); | |
95 | ||
96 | /* Called when the interface detects a watchdog pre-timeout. If | |
97 | this is NULL, it will be ignored for the user. */ | |
98 | void (*ipmi_watchdog_pretimeout)(void *handler_data); | |
99 | }; | |
100 | ||
101 | /* Create a new user of the IPMI layer on the given interface number. */ | |
102 | int ipmi_create_user(unsigned int if_num, | |
103 | struct ipmi_user_hndl *handler, | |
104 | void *handler_data, | |
105 | ipmi_user_t *user); | |
106 | ||
107 | /* Destroy the given user of the IPMI layer. Note that after this | |
108 | function returns, the system is guaranteed to not call any | |
109 | callbacks for the user. Thus as long as you destroy all the users | |
110 | before you unload a module, you will be safe. And if you destroy | |
111 | the users before you destroy the callback structures, it should be | |
112 | safe, too. */ | |
113 | int ipmi_destroy_user(ipmi_user_t user); | |
114 | ||
115 | /* Get the IPMI version of the BMC we are talking to. */ | |
116 | void ipmi_get_version(ipmi_user_t user, | |
117 | unsigned char *major, | |
118 | unsigned char *minor); | |
119 | ||
120 | /* Set and get the slave address and LUN that we will use for our | |
121 | source messages. Note that this affects the interface, not just | |
122 | this user, so it will affect all users of this interface. This is | |
123 | so some initialization code can come in and do the OEM-specific | |
124 | things it takes to determine your address (if not the BMC) and set | |
c14979b9 CM |
125 | it for everyone else. Note that each channel can have its own address. */ |
126 | int ipmi_set_my_address(ipmi_user_t user, | |
127 | unsigned int channel, | |
128 | unsigned char address); | |
129 | int ipmi_get_my_address(ipmi_user_t user, | |
130 | unsigned int channel, | |
131 | unsigned char *address); | |
132 | int ipmi_set_my_LUN(ipmi_user_t user, | |
133 | unsigned int channel, | |
134 | unsigned char LUN); | |
135 | int ipmi_get_my_LUN(ipmi_user_t user, | |
136 | unsigned int channel, | |
137 | unsigned char *LUN); | |
1da177e4 LT |
138 | |
139 | /* | |
140 | * Like ipmi_request, but lets you specify the number of retries and | |
141 | * the retry time. The retries is the number of times the message | |
142 | * will be resent if no reply is received. If set to -1, the default | |
143 | * value will be used. The retry time is the time in milliseconds | |
144 | * between retries. If set to zero, the default value will be | |
145 | * used. | |
146 | * | |
147 | * Don't use this unless you *really* have to. It's primarily for the | |
148 | * IPMI over LAN converter; since the LAN stuff does its own retries, | |
149 | * it makes no sense to do it here. However, this can be used if you | |
150 | * have unusual requirements. | |
151 | */ | |
152 | int ipmi_request_settime(ipmi_user_t user, | |
153 | struct ipmi_addr *addr, | |
154 | long msgid, | |
155 | struct kernel_ipmi_msg *msg, | |
156 | void *user_msg_data, | |
157 | int priority, | |
158 | int max_retries, | |
159 | unsigned int retry_time_ms); | |
160 | ||
161 | /* | |
162 | * Like ipmi_request, but with messages supplied. This will not | |
163 | * allocate any memory, and the messages may be statically allocated | |
164 | * (just make sure to do the "done" handling on them). Note that this | |
165 | * is primarily for the watchdog timer, since it should be able to | |
166 | * send messages even if no memory is available. This is subject to | |
167 | * change as the system changes, so don't use it unless you REALLY | |
168 | * have to. | |
169 | */ | |
170 | int ipmi_request_supply_msgs(ipmi_user_t user, | |
171 | struct ipmi_addr *addr, | |
172 | long msgid, | |
173 | struct kernel_ipmi_msg *msg, | |
174 | void *user_msg_data, | |
175 | void *supplied_smi, | |
176 | struct ipmi_recv_msg *supplied_recv, | |
177 | int priority); | |
178 | ||
fcfa4724 CM |
179 | /* |
180 | * Poll the IPMI interface for the user. This causes the IPMI code to | |
181 | * do an immediate check for information from the driver and handle | |
182 | * anything that is immediately pending. This will not block in any | |
bda4c30a CM |
183 | * way. This is useful if you need to spin waiting for something to |
184 | * happen in the IPMI driver. | |
fcfa4724 CM |
185 | */ |
186 | void ipmi_poll_interface(ipmi_user_t user); | |
187 | ||
1da177e4 LT |
188 | /* |
189 | * When commands come in to the SMS, the user can register to receive | |
c69c3127 | 190 | * them. Only one user can be listening on a specific netfn/cmd/chan tuple |
1da177e4 LT |
191 | * at a time, you will get an EBUSY error if the command is already |
192 | * registered. If a command is received that does not have a user | |
193 | * registered, the driver will automatically return the proper | |
c69c3127 CM |
194 | * error. Channels are specified as a bitfield, use IPMI_CHAN_ALL to |
195 | * mean all channels. | |
1da177e4 LT |
196 | */ |
197 | int ipmi_register_for_cmd(ipmi_user_t user, | |
198 | unsigned char netfn, | |
c69c3127 CM |
199 | unsigned char cmd, |
200 | unsigned int chans); | |
1da177e4 LT |
201 | int ipmi_unregister_for_cmd(ipmi_user_t user, |
202 | unsigned char netfn, | |
c69c3127 CM |
203 | unsigned char cmd, |
204 | unsigned int chans); | |
1da177e4 | 205 | |
b9675136 CM |
206 | /* |
207 | * Go into a mode where the driver will not autonomously attempt to do | |
208 | * things with the interface. It will still respond to attentions and | |
209 | * interrupts, and it will expect that commands will complete. It | |
210 | * will not automatcially check for flags, events, or things of that | |
211 | * nature. | |
212 | * | |
213 | * This is primarily used for firmware upgrades. The idea is that | |
214 | * when you go into firmware upgrade mode, you do this operation | |
215 | * and the driver will not attempt to do anything but what you tell | |
216 | * it or what the BMC asks for. | |
217 | * | |
218 | * Note that if you send a command that resets the BMC, the driver | |
219 | * will still expect a response from that command. So the BMC should | |
220 | * reset itself *after* the response is sent. Resetting before the | |
221 | * response is just silly. | |
222 | * | |
223 | * If in auto maintenance mode, the driver will automatically go into | |
224 | * maintenance mode for 30 seconds if it sees a cold reset, a warm | |
225 | * reset, or a firmware NetFN. This means that code that uses only | |
226 | * firmware NetFN commands to do upgrades will work automatically | |
227 | * without change, assuming it sends a message every 30 seconds or | |
228 | * less. | |
229 | * | |
230 | * See the IPMI_MAINTENANCE_MODE_xxx defines for what the mode means. | |
231 | */ | |
232 | int ipmi_get_maintenance_mode(ipmi_user_t user); | |
233 | int ipmi_set_maintenance_mode(ipmi_user_t user, int mode); | |
234 | ||
1da177e4 LT |
235 | /* |
236 | * When the user is created, it will not receive IPMI events by | |
237 | * default. The user must set this to TRUE to get incoming events. | |
238 | * The first user that sets this to TRUE will receive all events that | |
239 | * have been queued while no one was waiting for events. | |
240 | */ | |
89986496 | 241 | int ipmi_set_gets_events(ipmi_user_t user, bool val); |
1da177e4 LT |
242 | |
243 | /* | |
244 | * Called when a new SMI is registered. This will also be called on | |
245 | * every existing interface when a new watcher is registered with | |
246 | * ipmi_smi_watcher_register(). | |
247 | */ | |
c70d7499 | 248 | struct ipmi_smi_watcher { |
1da177e4 LT |
249 | struct list_head link; |
250 | ||
251 | /* You must set the owner to the current module, if you are in | |
252 | a module (generally just set it to "THIS_MODULE"). */ | |
253 | struct module *owner; | |
254 | ||
255 | /* These two are called with read locks held for the interface | |
256 | the watcher list. So you can add and remove users from the | |
257 | IPMI interface, send messages, etc., but you cannot add | |
258 | or remove SMI watchers or SMI interfaces. */ | |
50c812b2 | 259 | void (*new_smi)(int if_num, struct device *dev); |
1da177e4 LT |
260 | void (*smi_gone)(int if_num); |
261 | }; | |
262 | ||
263 | int ipmi_smi_watcher_register(struct ipmi_smi_watcher *watcher); | |
264 | int ipmi_smi_watcher_unregister(struct ipmi_smi_watcher *watcher); | |
265 | ||
266 | /* The following are various helper functions for dealing with IPMI | |
267 | addresses. */ | |
268 | ||
269 | /* Return the maximum length of an IPMI address given it's type. */ | |
270 | unsigned int ipmi_addr_length(int addr_type); | |
271 | ||
272 | /* Validate that the given IPMI address is valid. */ | |
273 | int ipmi_validate_addr(struct ipmi_addr *addr, int len); | |
274 | ||
16f4232c ZY |
275 | /* |
276 | * How did the IPMI driver find out about the device? | |
277 | */ | |
278 | enum ipmi_addr_src { | |
279 | SI_INVALID = 0, SI_HOTMOD, SI_HARDCODED, SI_SPMI, SI_ACPI, SI_SMBIOS, | |
280 | SI_PCI, SI_DEVICETREE, SI_DEFAULT | |
281 | }; | |
7e50387b | 282 | const char *ipmi_addr_src_to_str(enum ipmi_addr_src src); |
16f4232c ZY |
283 | |
284 | union ipmi_smi_info_union { | |
a11213fc | 285 | #ifdef CONFIG_ACPI |
16f4232c ZY |
286 | /* |
287 | * the acpi_info element is defined for the SI_ACPI | |
288 | * address type | |
289 | */ | |
290 | struct { | |
a11213fc | 291 | acpi_handle acpi_handle; |
16f4232c | 292 | } acpi_info; |
a11213fc | 293 | #endif |
16f4232c ZY |
294 | }; |
295 | ||
296 | struct ipmi_smi_info { | |
297 | enum ipmi_addr_src addr_src; | |
298 | ||
299 | /* | |
300 | * Base device for the interface. Don't forget to put this when | |
301 | * you are done. | |
302 | */ | |
303 | struct device *dev; | |
304 | ||
305 | /* | |
306 | * The addr_info provides more detailed info for some IPMI | |
307 | * devices, depending on the addr_src. Currently only SI_ACPI | |
308 | * info is provided. | |
309 | */ | |
310 | union ipmi_smi_info_union addr_info; | |
311 | }; | |
312 | ||
313 | /* This is to get the private info of ipmi_smi_t */ | |
314 | extern int ipmi_get_smi_info(int if_num, struct ipmi_smi_info *data); | |
315 | ||
1da177e4 | 316 | #endif /* __LINUX_IPMI_H */ |