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1da177e4 LT |
1 | /* |
2 | * ipmi_si.c | |
3 | * | |
4 | * The interface to the IPMI driver for the system interfaces (KCS, SMIC, | |
5 | * BT). | |
6 | * | |
7 | * Author: MontaVista Software, Inc. | |
8 | * Corey Minyard <minyard@mvista.com> | |
9 | * source@mvista.com | |
10 | * | |
11 | * Copyright 2002 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 | ||
35 | /* | |
36 | * This file holds the "policy" for the interface to the SMI state | |
37 | * machine. It does the configuration, handles timers and interrupts, | |
38 | * and drives the real SMI state machine. | |
39 | */ | |
40 | ||
1da177e4 LT |
41 | #include <linux/module.h> |
42 | #include <linux/moduleparam.h> | |
43 | #include <asm/system.h> | |
44 | #include <linux/sched.h> | |
45 | #include <linux/timer.h> | |
46 | #include <linux/errno.h> | |
47 | #include <linux/spinlock.h> | |
48 | #include <linux/slab.h> | |
49 | #include <linux/delay.h> | |
50 | #include <linux/list.h> | |
51 | #include <linux/pci.h> | |
52 | #include <linux/ioport.h> | |
ea94027b | 53 | #include <linux/notifier.h> |
b0defcdb | 54 | #include <linux/mutex.h> |
e9a705a0 | 55 | #include <linux/kthread.h> |
1da177e4 | 56 | #include <asm/irq.h> |
1da177e4 LT |
57 | #include <linux/interrupt.h> |
58 | #include <linux/rcupdate.h> | |
59 | #include <linux/ipmi_smi.h> | |
60 | #include <asm/io.h> | |
61 | #include "ipmi_si_sm.h" | |
62 | #include <linux/init.h> | |
b224cd3a | 63 | #include <linux/dmi.h> |
b361e27b CM |
64 | #include <linux/string.h> |
65 | #include <linux/ctype.h> | |
66 | ||
67 | #define PFX "ipmi_si: " | |
1da177e4 LT |
68 | |
69 | /* Measure times between events in the driver. */ | |
70 | #undef DEBUG_TIMING | |
71 | ||
72 | /* Call every 10 ms. */ | |
73 | #define SI_TIMEOUT_TIME_USEC 10000 | |
74 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
75 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
76 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
77 | short timeout */ | |
78 | ||
79 | enum si_intf_state { | |
80 | SI_NORMAL, | |
81 | SI_GETTING_FLAGS, | |
82 | SI_GETTING_EVENTS, | |
83 | SI_CLEARING_FLAGS, | |
84 | SI_CLEARING_FLAGS_THEN_SET_IRQ, | |
85 | SI_GETTING_MESSAGES, | |
86 | SI_ENABLE_INTERRUPTS1, | |
87 | SI_ENABLE_INTERRUPTS2 | |
88 | /* FIXME - add watchdog stuff. */ | |
89 | }; | |
90 | ||
9dbf68f9 CM |
91 | /* Some BT-specific defines we need here. */ |
92 | #define IPMI_BT_INTMASK_REG 2 | |
93 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
94 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
95 | ||
1da177e4 LT |
96 | enum si_type { |
97 | SI_KCS, SI_SMIC, SI_BT | |
98 | }; | |
b361e27b | 99 | static char *si_to_str[] = { "kcs", "smic", "bt" }; |
1da177e4 | 100 | |
50c812b2 CM |
101 | #define DEVICE_NAME "ipmi_si" |
102 | ||
103 | static struct device_driver ipmi_driver = | |
104 | { | |
105 | .name = DEVICE_NAME, | |
106 | .bus = &platform_bus_type | |
107 | }; | |
3ae0e0f9 | 108 | |
1da177e4 LT |
109 | struct smi_info |
110 | { | |
a9a2c44f | 111 | int intf_num; |
1da177e4 LT |
112 | ipmi_smi_t intf; |
113 | struct si_sm_data *si_sm; | |
114 | struct si_sm_handlers *handlers; | |
115 | enum si_type si_type; | |
116 | spinlock_t si_lock; | |
117 | spinlock_t msg_lock; | |
118 | struct list_head xmit_msgs; | |
119 | struct list_head hp_xmit_msgs; | |
120 | struct ipmi_smi_msg *curr_msg; | |
121 | enum si_intf_state si_state; | |
122 | ||
123 | /* Used to handle the various types of I/O that can occur with | |
124 | IPMI */ | |
125 | struct si_sm_io io; | |
126 | int (*io_setup)(struct smi_info *info); | |
127 | void (*io_cleanup)(struct smi_info *info); | |
128 | int (*irq_setup)(struct smi_info *info); | |
129 | void (*irq_cleanup)(struct smi_info *info); | |
130 | unsigned int io_size; | |
b0defcdb CM |
131 | char *addr_source; /* ACPI, PCI, SMBIOS, hardcode, default. */ |
132 | void (*addr_source_cleanup)(struct smi_info *info); | |
133 | void *addr_source_data; | |
1da177e4 | 134 | |
3ae0e0f9 CM |
135 | /* Per-OEM handler, called from handle_flags(). |
136 | Returns 1 when handle_flags() needs to be re-run | |
137 | or 0 indicating it set si_state itself. | |
138 | */ | |
139 | int (*oem_data_avail_handler)(struct smi_info *smi_info); | |
140 | ||
1da177e4 LT |
141 | /* Flags from the last GET_MSG_FLAGS command, used when an ATTN |
142 | is set to hold the flags until we are done handling everything | |
143 | from the flags. */ | |
144 | #define RECEIVE_MSG_AVAIL 0x01 | |
145 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
146 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
147 | #define OEM0_DATA_AVAIL 0x20 |
148 | #define OEM1_DATA_AVAIL 0x40 | |
149 | #define OEM2_DATA_AVAIL 0x80 | |
150 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
151 | OEM1_DATA_AVAIL | \ | |
152 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
153 | unsigned char msg_flags; |
154 | ||
155 | /* If set to true, this will request events the next time the | |
156 | state machine is idle. */ | |
157 | atomic_t req_events; | |
158 | ||
159 | /* If true, run the state machine to completion on every send | |
160 | call. Generally used after a panic to make sure stuff goes | |
161 | out. */ | |
162 | int run_to_completion; | |
163 | ||
164 | /* The I/O port of an SI interface. */ | |
165 | int port; | |
166 | ||
167 | /* The space between start addresses of the two ports. For | |
168 | instance, if the first port is 0xca2 and the spacing is 4, then | |
169 | the second port is 0xca6. */ | |
170 | unsigned int spacing; | |
171 | ||
172 | /* zero if no irq; */ | |
173 | int irq; | |
174 | ||
175 | /* The timer for this si. */ | |
176 | struct timer_list si_timer; | |
177 | ||
178 | /* The time (in jiffies) the last timeout occurred at. */ | |
179 | unsigned long last_timeout_jiffies; | |
180 | ||
181 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 182 | atomic_t stop_operation; |
1da177e4 LT |
183 | |
184 | /* The driver will disable interrupts when it gets into a | |
185 | situation where it cannot handle messages due to lack of | |
186 | memory. Once that situation clears up, it will re-enable | |
187 | interrupts. */ | |
188 | int interrupt_disabled; | |
189 | ||
50c812b2 | 190 | /* From the get device id response... */ |
3ae0e0f9 | 191 | struct ipmi_device_id device_id; |
1da177e4 | 192 | |
50c812b2 CM |
193 | /* Driver model stuff. */ |
194 | struct device *dev; | |
195 | struct platform_device *pdev; | |
196 | ||
197 | /* True if we allocated the device, false if it came from | |
198 | * someplace else (like PCI). */ | |
199 | int dev_registered; | |
200 | ||
1da177e4 LT |
201 | /* Slave address, could be reported from DMI. */ |
202 | unsigned char slave_addr; | |
203 | ||
204 | /* Counters and things for the proc filesystem. */ | |
205 | spinlock_t count_lock; | |
206 | unsigned long short_timeouts; | |
207 | unsigned long long_timeouts; | |
208 | unsigned long timeout_restarts; | |
209 | unsigned long idles; | |
210 | unsigned long interrupts; | |
211 | unsigned long attentions; | |
212 | unsigned long flag_fetches; | |
213 | unsigned long hosed_count; | |
214 | unsigned long complete_transactions; | |
215 | unsigned long events; | |
216 | unsigned long watchdog_pretimeouts; | |
217 | unsigned long incoming_messages; | |
a9a2c44f | 218 | |
e9a705a0 | 219 | struct task_struct *thread; |
b0defcdb CM |
220 | |
221 | struct list_head link; | |
1da177e4 LT |
222 | }; |
223 | ||
a51f4a81 CM |
224 | #define SI_MAX_PARMS 4 |
225 | ||
226 | static int force_kipmid[SI_MAX_PARMS]; | |
227 | static int num_force_kipmid; | |
228 | ||
b361e27b CM |
229 | static int unload_when_empty = 1; |
230 | ||
b0defcdb | 231 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 232 | static void cleanup_one_si(struct smi_info *to_clean); |
b0defcdb | 233 | |
e041c683 | 234 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
ea94027b CM |
235 | static int register_xaction_notifier(struct notifier_block * nb) |
236 | { | |
e041c683 | 237 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
238 | } |
239 | ||
1da177e4 LT |
240 | static void deliver_recv_msg(struct smi_info *smi_info, |
241 | struct ipmi_smi_msg *msg) | |
242 | { | |
243 | /* Deliver the message to the upper layer with the lock | |
244 | released. */ | |
245 | spin_unlock(&(smi_info->si_lock)); | |
246 | ipmi_smi_msg_received(smi_info->intf, msg); | |
247 | spin_lock(&(smi_info->si_lock)); | |
248 | } | |
249 | ||
4d7cbac7 | 250 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
251 | { |
252 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
253 | ||
4d7cbac7 CM |
254 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
255 | cCode = IPMI_ERR_UNSPECIFIED; | |
256 | /* else use it as is */ | |
257 | ||
1da177e4 LT |
258 | /* Make it a reponse */ |
259 | msg->rsp[0] = msg->data[0] | 4; | |
260 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 261 | msg->rsp[2] = cCode; |
1da177e4 LT |
262 | msg->rsp_size = 3; |
263 | ||
264 | smi_info->curr_msg = NULL; | |
265 | deliver_recv_msg(smi_info, msg); | |
266 | } | |
267 | ||
268 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
269 | { | |
270 | int rv; | |
271 | struct list_head *entry = NULL; | |
272 | #ifdef DEBUG_TIMING | |
273 | struct timeval t; | |
274 | #endif | |
275 | ||
276 | /* No need to save flags, we aleady have interrupts off and we | |
277 | already hold the SMI lock. */ | |
278 | spin_lock(&(smi_info->msg_lock)); | |
279 | ||
280 | /* Pick the high priority queue first. */ | |
b0defcdb | 281 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 282 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 283 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
284 | entry = smi_info->xmit_msgs.next; |
285 | } | |
286 | ||
b0defcdb | 287 | if (!entry) { |
1da177e4 LT |
288 | smi_info->curr_msg = NULL; |
289 | rv = SI_SM_IDLE; | |
290 | } else { | |
291 | int err; | |
292 | ||
293 | list_del(entry); | |
294 | smi_info->curr_msg = list_entry(entry, | |
295 | struct ipmi_smi_msg, | |
296 | link); | |
297 | #ifdef DEBUG_TIMING | |
298 | do_gettimeofday(&t); | |
299 | printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
300 | #endif | |
e041c683 AS |
301 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
302 | 0, smi_info); | |
ea94027b CM |
303 | if (err & NOTIFY_STOP_MASK) { |
304 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
305 | goto out; | |
306 | } | |
1da177e4 LT |
307 | err = smi_info->handlers->start_transaction( |
308 | smi_info->si_sm, | |
309 | smi_info->curr_msg->data, | |
310 | smi_info->curr_msg->data_size); | |
311 | if (err) { | |
4d7cbac7 | 312 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
313 | } |
314 | ||
315 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
316 | } | |
ea94027b | 317 | out: |
1da177e4 LT |
318 | spin_unlock(&(smi_info->msg_lock)); |
319 | ||
320 | return rv; | |
321 | } | |
322 | ||
323 | static void start_enable_irq(struct smi_info *smi_info) | |
324 | { | |
325 | unsigned char msg[2]; | |
326 | ||
327 | /* If we are enabling interrupts, we have to tell the | |
328 | BMC to use them. */ | |
329 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
330 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
331 | ||
332 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
333 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
334 | } | |
335 | ||
336 | static void start_clear_flags(struct smi_info *smi_info) | |
337 | { | |
338 | unsigned char msg[3]; | |
339 | ||
340 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
341 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
342 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
343 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
344 | ||
345 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
346 | smi_info->si_state = SI_CLEARING_FLAGS; | |
347 | } | |
348 | ||
349 | /* When we have a situtaion where we run out of memory and cannot | |
350 | allocate messages, we just leave them in the BMC and run the system | |
351 | polled until we can allocate some memory. Once we have some | |
352 | memory, we will re-enable the interrupt. */ | |
353 | static inline void disable_si_irq(struct smi_info *smi_info) | |
354 | { | |
b0defcdb | 355 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 LT |
356 | disable_irq_nosync(smi_info->irq); |
357 | smi_info->interrupt_disabled = 1; | |
358 | } | |
359 | } | |
360 | ||
361 | static inline void enable_si_irq(struct smi_info *smi_info) | |
362 | { | |
363 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
364 | enable_irq(smi_info->irq); | |
365 | smi_info->interrupt_disabled = 0; | |
366 | } | |
367 | } | |
368 | ||
369 | static void handle_flags(struct smi_info *smi_info) | |
370 | { | |
3ae0e0f9 | 371 | retry: |
1da177e4 LT |
372 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
373 | /* Watchdog pre-timeout */ | |
374 | spin_lock(&smi_info->count_lock); | |
375 | smi_info->watchdog_pretimeouts++; | |
376 | spin_unlock(&smi_info->count_lock); | |
377 | ||
378 | start_clear_flags(smi_info); | |
379 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
380 | spin_unlock(&(smi_info->si_lock)); | |
381 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
382 | spin_lock(&(smi_info->si_lock)); | |
383 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { | |
384 | /* Messages available. */ | |
385 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 386 | if (!smi_info->curr_msg) { |
1da177e4 LT |
387 | disable_si_irq(smi_info); |
388 | smi_info->si_state = SI_NORMAL; | |
389 | return; | |
390 | } | |
391 | enable_si_irq(smi_info); | |
392 | ||
393 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
394 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
395 | smi_info->curr_msg->data_size = 2; | |
396 | ||
397 | smi_info->handlers->start_transaction( | |
398 | smi_info->si_sm, | |
399 | smi_info->curr_msg->data, | |
400 | smi_info->curr_msg->data_size); | |
401 | smi_info->si_state = SI_GETTING_MESSAGES; | |
402 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
403 | /* Events available. */ | |
404 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 405 | if (!smi_info->curr_msg) { |
1da177e4 LT |
406 | disable_si_irq(smi_info); |
407 | smi_info->si_state = SI_NORMAL; | |
408 | return; | |
409 | } | |
410 | enable_si_irq(smi_info); | |
411 | ||
412 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
413 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
414 | smi_info->curr_msg->data_size = 2; | |
415 | ||
416 | smi_info->handlers->start_transaction( | |
417 | smi_info->si_sm, | |
418 | smi_info->curr_msg->data, | |
419 | smi_info->curr_msg->data_size); | |
420 | smi_info->si_state = SI_GETTING_EVENTS; | |
4064d5ef CM |
421 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
422 | smi_info->oem_data_avail_handler) { | |
423 | if (smi_info->oem_data_avail_handler(smi_info)) | |
424 | goto retry; | |
1da177e4 LT |
425 | } else { |
426 | smi_info->si_state = SI_NORMAL; | |
427 | } | |
428 | } | |
429 | ||
430 | static void handle_transaction_done(struct smi_info *smi_info) | |
431 | { | |
432 | struct ipmi_smi_msg *msg; | |
433 | #ifdef DEBUG_TIMING | |
434 | struct timeval t; | |
435 | ||
436 | do_gettimeofday(&t); | |
437 | printk("**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
438 | #endif | |
439 | switch (smi_info->si_state) { | |
440 | case SI_NORMAL: | |
b0defcdb | 441 | if (!smi_info->curr_msg) |
1da177e4 LT |
442 | break; |
443 | ||
444 | smi_info->curr_msg->rsp_size | |
445 | = smi_info->handlers->get_result( | |
446 | smi_info->si_sm, | |
447 | smi_info->curr_msg->rsp, | |
448 | IPMI_MAX_MSG_LENGTH); | |
449 | ||
450 | /* Do this here becase deliver_recv_msg() releases the | |
451 | lock, and a new message can be put in during the | |
452 | time the lock is released. */ | |
453 | msg = smi_info->curr_msg; | |
454 | smi_info->curr_msg = NULL; | |
455 | deliver_recv_msg(smi_info, msg); | |
456 | break; | |
457 | ||
458 | case SI_GETTING_FLAGS: | |
459 | { | |
460 | unsigned char msg[4]; | |
461 | unsigned int len; | |
462 | ||
463 | /* We got the flags from the SMI, now handle them. */ | |
464 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
465 | if (msg[2] != 0) { | |
466 | /* Error fetching flags, just give up for | |
467 | now. */ | |
468 | smi_info->si_state = SI_NORMAL; | |
469 | } else if (len < 4) { | |
470 | /* Hmm, no flags. That's technically illegal, but | |
471 | don't use uninitialized data. */ | |
472 | smi_info->si_state = SI_NORMAL; | |
473 | } else { | |
474 | smi_info->msg_flags = msg[3]; | |
475 | handle_flags(smi_info); | |
476 | } | |
477 | break; | |
478 | } | |
479 | ||
480 | case SI_CLEARING_FLAGS: | |
481 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
482 | { | |
483 | unsigned char msg[3]; | |
484 | ||
485 | /* We cleared the flags. */ | |
486 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
487 | if (msg[2] != 0) { | |
488 | /* Error clearing flags */ | |
489 | printk(KERN_WARNING | |
490 | "ipmi_si: Error clearing flags: %2.2x\n", | |
491 | msg[2]); | |
492 | } | |
493 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
494 | start_enable_irq(smi_info); | |
495 | else | |
496 | smi_info->si_state = SI_NORMAL; | |
497 | break; | |
498 | } | |
499 | ||
500 | case SI_GETTING_EVENTS: | |
501 | { | |
502 | smi_info->curr_msg->rsp_size | |
503 | = smi_info->handlers->get_result( | |
504 | smi_info->si_sm, | |
505 | smi_info->curr_msg->rsp, | |
506 | IPMI_MAX_MSG_LENGTH); | |
507 | ||
508 | /* Do this here becase deliver_recv_msg() releases the | |
509 | lock, and a new message can be put in during the | |
510 | time the lock is released. */ | |
511 | msg = smi_info->curr_msg; | |
512 | smi_info->curr_msg = NULL; | |
513 | if (msg->rsp[2] != 0) { | |
514 | /* Error getting event, probably done. */ | |
515 | msg->done(msg); | |
516 | ||
517 | /* Take off the event flag. */ | |
518 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
519 | handle_flags(smi_info); | |
520 | } else { | |
521 | spin_lock(&smi_info->count_lock); | |
522 | smi_info->events++; | |
523 | spin_unlock(&smi_info->count_lock); | |
524 | ||
525 | /* Do this before we deliver the message | |
526 | because delivering the message releases the | |
527 | lock and something else can mess with the | |
528 | state. */ | |
529 | handle_flags(smi_info); | |
530 | ||
531 | deliver_recv_msg(smi_info, msg); | |
532 | } | |
533 | break; | |
534 | } | |
535 | ||
536 | case SI_GETTING_MESSAGES: | |
537 | { | |
538 | smi_info->curr_msg->rsp_size | |
539 | = smi_info->handlers->get_result( | |
540 | smi_info->si_sm, | |
541 | smi_info->curr_msg->rsp, | |
542 | IPMI_MAX_MSG_LENGTH); | |
543 | ||
544 | /* Do this here becase deliver_recv_msg() releases the | |
545 | lock, and a new message can be put in during the | |
546 | time the lock is released. */ | |
547 | msg = smi_info->curr_msg; | |
548 | smi_info->curr_msg = NULL; | |
549 | if (msg->rsp[2] != 0) { | |
550 | /* Error getting event, probably done. */ | |
551 | msg->done(msg); | |
552 | ||
553 | /* Take off the msg flag. */ | |
554 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
555 | handle_flags(smi_info); | |
556 | } else { | |
557 | spin_lock(&smi_info->count_lock); | |
558 | smi_info->incoming_messages++; | |
559 | spin_unlock(&smi_info->count_lock); | |
560 | ||
561 | /* Do this before we deliver the message | |
562 | because delivering the message releases the | |
563 | lock and something else can mess with the | |
564 | state. */ | |
565 | handle_flags(smi_info); | |
566 | ||
567 | deliver_recv_msg(smi_info, msg); | |
568 | } | |
569 | break; | |
570 | } | |
571 | ||
572 | case SI_ENABLE_INTERRUPTS1: | |
573 | { | |
574 | unsigned char msg[4]; | |
575 | ||
576 | /* We got the flags from the SMI, now handle them. */ | |
577 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
578 | if (msg[2] != 0) { | |
579 | printk(KERN_WARNING | |
580 | "ipmi_si: Could not enable interrupts" | |
581 | ", failed get, using polled mode.\n"); | |
582 | smi_info->si_state = SI_NORMAL; | |
583 | } else { | |
584 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
585 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
586 | msg[2] = msg[3] | 1; /* enable msg queue int */ | |
587 | smi_info->handlers->start_transaction( | |
588 | smi_info->si_sm, msg, 3); | |
589 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
590 | } | |
591 | break; | |
592 | } | |
593 | ||
594 | case SI_ENABLE_INTERRUPTS2: | |
595 | { | |
596 | unsigned char msg[4]; | |
597 | ||
598 | /* We got the flags from the SMI, now handle them. */ | |
599 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
600 | if (msg[2] != 0) { | |
601 | printk(KERN_WARNING | |
602 | "ipmi_si: Could not enable interrupts" | |
603 | ", failed set, using polled mode.\n"); | |
604 | } | |
605 | smi_info->si_state = SI_NORMAL; | |
606 | break; | |
607 | } | |
608 | } | |
609 | } | |
610 | ||
611 | /* Called on timeouts and events. Timeouts should pass the elapsed | |
612 | time, interrupts should pass in zero. */ | |
613 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, | |
614 | int time) | |
615 | { | |
616 | enum si_sm_result si_sm_result; | |
617 | ||
618 | restart: | |
619 | /* There used to be a loop here that waited a little while | |
620 | (around 25us) before giving up. That turned out to be | |
621 | pointless, the minimum delays I was seeing were in the 300us | |
622 | range, which is far too long to wait in an interrupt. So | |
623 | we just run until the state machine tells us something | |
624 | happened or it needs a delay. */ | |
625 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); | |
626 | time = 0; | |
627 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
628 | { | |
629 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
630 | } | |
631 | ||
632 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) | |
633 | { | |
634 | spin_lock(&smi_info->count_lock); | |
635 | smi_info->complete_transactions++; | |
636 | spin_unlock(&smi_info->count_lock); | |
637 | ||
638 | handle_transaction_done(smi_info); | |
639 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
640 | } | |
641 | else if (si_sm_result == SI_SM_HOSED) | |
642 | { | |
643 | spin_lock(&smi_info->count_lock); | |
644 | smi_info->hosed_count++; | |
645 | spin_unlock(&smi_info->count_lock); | |
646 | ||
647 | /* Do the before return_hosed_msg, because that | |
648 | releases the lock. */ | |
649 | smi_info->si_state = SI_NORMAL; | |
650 | if (smi_info->curr_msg != NULL) { | |
651 | /* If we were handling a user message, format | |
652 | a response to send to the upper layer to | |
653 | tell it about the error. */ | |
4d7cbac7 | 654 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
655 | } |
656 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
657 | } | |
658 | ||
659 | /* We prefer handling attn over new messages. */ | |
660 | if (si_sm_result == SI_SM_ATTN) | |
661 | { | |
662 | unsigned char msg[2]; | |
663 | ||
664 | spin_lock(&smi_info->count_lock); | |
665 | smi_info->attentions++; | |
666 | spin_unlock(&smi_info->count_lock); | |
667 | ||
668 | /* Got a attn, send down a get message flags to see | |
669 | what's causing it. It would be better to handle | |
670 | this in the upper layer, but due to the way | |
671 | interrupts work with the SMI, that's not really | |
672 | possible. */ | |
673 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
674 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
675 | ||
676 | smi_info->handlers->start_transaction( | |
677 | smi_info->si_sm, msg, 2); | |
678 | smi_info->si_state = SI_GETTING_FLAGS; | |
679 | goto restart; | |
680 | } | |
681 | ||
682 | /* If we are currently idle, try to start the next message. */ | |
683 | if (si_sm_result == SI_SM_IDLE) { | |
684 | spin_lock(&smi_info->count_lock); | |
685 | smi_info->idles++; | |
686 | spin_unlock(&smi_info->count_lock); | |
687 | ||
688 | si_sm_result = start_next_msg(smi_info); | |
689 | if (si_sm_result != SI_SM_IDLE) | |
690 | goto restart; | |
691 | } | |
692 | ||
693 | if ((si_sm_result == SI_SM_IDLE) | |
694 | && (atomic_read(&smi_info->req_events))) | |
695 | { | |
696 | /* We are idle and the upper layer requested that I fetch | |
697 | events, so do so. */ | |
55162fb1 | 698 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 699 | |
55162fb1 CM |
700 | smi_info->curr_msg = ipmi_alloc_smi_msg(); |
701 | if (!smi_info->curr_msg) | |
702 | goto out; | |
1da177e4 | 703 | |
55162fb1 CM |
704 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
705 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
706 | smi_info->curr_msg->data_size = 2; | |
1da177e4 LT |
707 | |
708 | smi_info->handlers->start_transaction( | |
55162fb1 CM |
709 | smi_info->si_sm, |
710 | smi_info->curr_msg->data, | |
711 | smi_info->curr_msg->data_size); | |
712 | smi_info->si_state = SI_GETTING_EVENTS; | |
1da177e4 LT |
713 | goto restart; |
714 | } | |
55162fb1 | 715 | out: |
1da177e4 LT |
716 | return si_sm_result; |
717 | } | |
718 | ||
719 | static void sender(void *send_info, | |
720 | struct ipmi_smi_msg *msg, | |
721 | int priority) | |
722 | { | |
723 | struct smi_info *smi_info = send_info; | |
724 | enum si_sm_result result; | |
725 | unsigned long flags; | |
726 | #ifdef DEBUG_TIMING | |
727 | struct timeval t; | |
728 | #endif | |
729 | ||
b361e27b CM |
730 | if (atomic_read(&smi_info->stop_operation)) { |
731 | msg->rsp[0] = msg->data[0] | 4; | |
732 | msg->rsp[1] = msg->data[1]; | |
733 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
734 | msg->rsp_size = 3; | |
735 | deliver_recv_msg(smi_info, msg); | |
736 | return; | |
737 | } | |
738 | ||
1da177e4 LT |
739 | spin_lock_irqsave(&(smi_info->msg_lock), flags); |
740 | #ifdef DEBUG_TIMING | |
741 | do_gettimeofday(&t); | |
742 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
743 | #endif | |
744 | ||
745 | if (smi_info->run_to_completion) { | |
746 | /* If we are running to completion, then throw it in | |
747 | the list and run transactions until everything is | |
748 | clear. Priority doesn't matter here. */ | |
749 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); | |
750 | ||
751 | /* We have to release the msg lock and claim the smi | |
752 | lock in this case, because of race conditions. */ | |
753 | spin_unlock_irqrestore(&(smi_info->msg_lock), flags); | |
754 | ||
755 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
756 | result = smi_event_handler(smi_info, 0); | |
757 | while (result != SI_SM_IDLE) { | |
758 | udelay(SI_SHORT_TIMEOUT_USEC); | |
759 | result = smi_event_handler(smi_info, | |
760 | SI_SHORT_TIMEOUT_USEC); | |
761 | } | |
762 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
763 | return; | |
764 | } else { | |
765 | if (priority > 0) { | |
766 | list_add_tail(&(msg->link), &(smi_info->hp_xmit_msgs)); | |
767 | } else { | |
768 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); | |
769 | } | |
770 | } | |
771 | spin_unlock_irqrestore(&(smi_info->msg_lock), flags); | |
772 | ||
773 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
774 | if ((smi_info->si_state == SI_NORMAL) | |
775 | && (smi_info->curr_msg == NULL)) | |
776 | { | |
777 | start_next_msg(smi_info); | |
1da177e4 LT |
778 | } |
779 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
780 | } | |
781 | ||
782 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
783 | { | |
784 | struct smi_info *smi_info = send_info; | |
785 | enum si_sm_result result; | |
786 | unsigned long flags; | |
787 | ||
788 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
789 | ||
790 | smi_info->run_to_completion = i_run_to_completion; | |
791 | if (i_run_to_completion) { | |
792 | result = smi_event_handler(smi_info, 0); | |
793 | while (result != SI_SM_IDLE) { | |
794 | udelay(SI_SHORT_TIMEOUT_USEC); | |
795 | result = smi_event_handler(smi_info, | |
796 | SI_SHORT_TIMEOUT_USEC); | |
797 | } | |
798 | } | |
799 | ||
800 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
801 | } | |
802 | ||
a9a2c44f CM |
803 | static int ipmi_thread(void *data) |
804 | { | |
805 | struct smi_info *smi_info = data; | |
e9a705a0 | 806 | unsigned long flags; |
a9a2c44f CM |
807 | enum si_sm_result smi_result; |
808 | ||
a9a2c44f | 809 | set_user_nice(current, 19); |
e9a705a0 | 810 | while (!kthread_should_stop()) { |
a9a2c44f | 811 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 812 | smi_result = smi_event_handler(smi_info, 0); |
a9a2c44f | 813 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
e9a705a0 MD |
814 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
815 | /* do nothing */ | |
a9a2c44f | 816 | } |
e9a705a0 | 817 | else if (smi_result == SI_SM_CALL_WITH_DELAY) |
33979734 | 818 | schedule(); |
e9a705a0 MD |
819 | else |
820 | schedule_timeout_interruptible(1); | |
a9a2c44f | 821 | } |
a9a2c44f CM |
822 | return 0; |
823 | } | |
824 | ||
825 | ||
1da177e4 LT |
826 | static void poll(void *send_info) |
827 | { | |
828 | struct smi_info *smi_info = send_info; | |
829 | ||
15c62e10 CM |
830 | /* |
831 | * Make sure there is some delay in the poll loop so we can | |
832 | * drive time forward and timeout things. | |
833 | */ | |
834 | udelay(10); | |
835 | smi_event_handler(smi_info, 10); | |
1da177e4 LT |
836 | } |
837 | ||
838 | static void request_events(void *send_info) | |
839 | { | |
840 | struct smi_info *smi_info = send_info; | |
841 | ||
b361e27b CM |
842 | if (atomic_read(&smi_info->stop_operation)) |
843 | return; | |
844 | ||
1da177e4 LT |
845 | atomic_set(&smi_info->req_events, 1); |
846 | } | |
847 | ||
0c8204b3 | 848 | static int initialized; |
1da177e4 | 849 | |
1da177e4 LT |
850 | static void smi_timeout(unsigned long data) |
851 | { | |
852 | struct smi_info *smi_info = (struct smi_info *) data; | |
853 | enum si_sm_result smi_result; | |
854 | unsigned long flags; | |
855 | unsigned long jiffies_now; | |
c4edff1c | 856 | long time_diff; |
1da177e4 LT |
857 | #ifdef DEBUG_TIMING |
858 | struct timeval t; | |
859 | #endif | |
860 | ||
a9a2c44f | 861 | if (atomic_read(&smi_info->stop_operation)) |
1da177e4 | 862 | return; |
1da177e4 LT |
863 | |
864 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
865 | #ifdef DEBUG_TIMING | |
866 | do_gettimeofday(&t); | |
867 | printk("**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
868 | #endif | |
869 | jiffies_now = jiffies; | |
c4edff1c | 870 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
871 | * SI_USEC_PER_JIFFY); |
872 | smi_result = smi_event_handler(smi_info, time_diff); | |
873 | ||
874 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
875 | ||
876 | smi_info->last_timeout_jiffies = jiffies_now; | |
877 | ||
b0defcdb | 878 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 LT |
879 | /* Running with interrupts, only do long timeouts. */ |
880 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
881 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
882 | smi_info->long_timeouts++; | |
883 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
884 | goto do_add_timer; | |
885 | } | |
886 | ||
887 | /* If the state machine asks for a short delay, then shorten | |
888 | the timer timeout. */ | |
889 | if (smi_result == SI_SM_CALL_WITH_DELAY) { | |
890 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
891 | smi_info->short_timeouts++; | |
892 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
1da177e4 | 893 | smi_info->si_timer.expires = jiffies + 1; |
1da177e4 LT |
894 | } else { |
895 | spin_lock_irqsave(&smi_info->count_lock, flags); | |
896 | smi_info->long_timeouts++; | |
897 | spin_unlock_irqrestore(&smi_info->count_lock, flags); | |
898 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
1da177e4 LT |
899 | } |
900 | ||
901 | do_add_timer: | |
902 | add_timer(&(smi_info->si_timer)); | |
903 | } | |
904 | ||
7d12e780 | 905 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
906 | { |
907 | struct smi_info *smi_info = data; | |
908 | unsigned long flags; | |
909 | #ifdef DEBUG_TIMING | |
910 | struct timeval t; | |
911 | #endif | |
912 | ||
913 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
914 | ||
915 | spin_lock(&smi_info->count_lock); | |
916 | smi_info->interrupts++; | |
917 | spin_unlock(&smi_info->count_lock); | |
918 | ||
a9a2c44f | 919 | if (atomic_read(&smi_info->stop_operation)) |
1da177e4 LT |
920 | goto out; |
921 | ||
922 | #ifdef DEBUG_TIMING | |
923 | do_gettimeofday(&t); | |
924 | printk("**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
925 | #endif | |
926 | smi_event_handler(smi_info, 0); | |
927 | out: | |
928 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
929 | return IRQ_HANDLED; | |
930 | } | |
931 | ||
7d12e780 | 932 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
933 | { |
934 | struct smi_info *smi_info = data; | |
935 | /* We need to clear the IRQ flag for the BT interface. */ | |
936 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
937 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
938 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 939 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
940 | } |
941 | ||
453823ba CM |
942 | static int smi_start_processing(void *send_info, |
943 | ipmi_smi_t intf) | |
944 | { | |
945 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 946 | int enable = 0; |
453823ba CM |
947 | |
948 | new_smi->intf = intf; | |
949 | ||
950 | /* Set up the timer that drives the interface. */ | |
951 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
952 | new_smi->last_timeout_jiffies = jiffies; | |
953 | mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
954 | ||
a51f4a81 CM |
955 | /* |
956 | * Check if the user forcefully enabled the daemon. | |
957 | */ | |
958 | if (new_smi->intf_num < num_force_kipmid) | |
959 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
960 | /* |
961 | * The BT interface is efficient enough to not need a thread, | |
962 | * and there is no need for a thread if we have interrupts. | |
963 | */ | |
a51f4a81 CM |
964 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
965 | enable = 1; | |
966 | ||
967 | if (enable) { | |
453823ba CM |
968 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
969 | "kipmi%d", new_smi->intf_num); | |
970 | if (IS_ERR(new_smi->thread)) { | |
971 | printk(KERN_NOTICE "ipmi_si_intf: Could not start" | |
972 | " kernel thread due to error %ld, only using" | |
973 | " timers to drive the interface\n", | |
974 | PTR_ERR(new_smi->thread)); | |
975 | new_smi->thread = NULL; | |
976 | } | |
977 | } | |
978 | ||
979 | return 0; | |
980 | } | |
9dbf68f9 | 981 | |
b9675136 CM |
982 | static void set_maintenance_mode(void *send_info, int enable) |
983 | { | |
984 | struct smi_info *smi_info = send_info; | |
985 | ||
986 | if (!enable) | |
987 | atomic_set(&smi_info->req_events, 0); | |
988 | } | |
989 | ||
1da177e4 LT |
990 | static struct ipmi_smi_handlers handlers = |
991 | { | |
992 | .owner = THIS_MODULE, | |
453823ba | 993 | .start_processing = smi_start_processing, |
1da177e4 LT |
994 | .sender = sender, |
995 | .request_events = request_events, | |
b9675136 | 996 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
997 | .set_run_to_completion = set_run_to_completion, |
998 | .poll = poll, | |
999 | }; | |
1000 | ||
1001 | /* There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1002 | a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS */ | |
1003 | ||
b0defcdb | 1004 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1005 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1006 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1007 | |
1da177e4 LT |
1008 | #define DEFAULT_REGSPACING 1 |
1009 | ||
1010 | static int si_trydefaults = 1; | |
1011 | static char *si_type[SI_MAX_PARMS]; | |
1012 | #define MAX_SI_TYPE_STR 30 | |
1013 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1014 | static unsigned long addrs[SI_MAX_PARMS]; | |
1015 | static int num_addrs; | |
1016 | static unsigned int ports[SI_MAX_PARMS]; | |
1017 | static int num_ports; | |
1018 | static int irqs[SI_MAX_PARMS]; | |
1019 | static int num_irqs; | |
1020 | static int regspacings[SI_MAX_PARMS]; | |
0c8204b3 | 1021 | static int num_regspacings; |
1da177e4 | 1022 | static int regsizes[SI_MAX_PARMS]; |
0c8204b3 | 1023 | static int num_regsizes; |
1da177e4 | 1024 | static int regshifts[SI_MAX_PARMS]; |
0c8204b3 | 1025 | static int num_regshifts; |
1da177e4 | 1026 | static int slave_addrs[SI_MAX_PARMS]; |
0c8204b3 | 1027 | static int num_slave_addrs; |
1da177e4 | 1028 | |
b361e27b CM |
1029 | #define IPMI_IO_ADDR_SPACE 0 |
1030 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1031 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1032 | |
1033 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1034 | ||
1035 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1036 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1037 | " Documentation/IPMI.txt in the kernel sources for the" | |
1038 | " gory details."); | |
1da177e4 LT |
1039 | |
1040 | module_param_named(trydefaults, si_trydefaults, bool, 0); | |
1041 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1042 | " default scan of the KCS and SMIC interface at the standard" | |
1043 | " address"); | |
1044 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1045 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1046 | " interface separated by commas. The types are 'kcs'," | |
1047 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1048 | " the first interface to kcs and the second to bt"); | |
1049 | module_param_array(addrs, long, &num_addrs, 0); | |
1050 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" | |
1051 | " addresses separated by commas. Only use if an interface" | |
1052 | " is in memory. Otherwise, set it to zero or leave" | |
1053 | " it blank."); | |
1054 | module_param_array(ports, int, &num_ports, 0); | |
1055 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" | |
1056 | " addresses separated by commas. Only use if an interface" | |
1057 | " is a port. Otherwise, set it to zero or leave" | |
1058 | " it blank."); | |
1059 | module_param_array(irqs, int, &num_irqs, 0); | |
1060 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1061 | " addresses separated by commas. Only use if an interface" | |
1062 | " has an interrupt. Otherwise, set it to zero or leave" | |
1063 | " it blank."); | |
1064 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1065 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1066 | " and each successive register used by the interface. For" | |
1067 | " instance, if the start address is 0xca2 and the spacing" | |
1068 | " is 2, then the second address is at 0xca4. Defaults" | |
1069 | " to 1."); | |
1070 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1071 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1072 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1073 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1074 | " the 8-bit IPMI register has to be read from a larger" | |
1075 | " register."); | |
1076 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1077 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1078 | " IPMI register, in bits. For instance, if the data" | |
1079 | " is read from a 32-bit word and the IPMI data is in" | |
1080 | " bit 8-15, then the shift would be 8"); | |
1081 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1082 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1083 | " the controller. Normally this is 0x20, but can be" | |
1084 | " overridden by this parm. This is an array indexed" | |
1085 | " by interface number."); | |
a51f4a81 CM |
1086 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1087 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1088 | " disabled(0). Normally the IPMI driver auto-detects" | |
1089 | " this, but the value may be overridden by this parm."); | |
b361e27b CM |
1090 | module_param(unload_when_empty, int, 0); |
1091 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" | |
1092 | " specified or found, default is 1. Setting to 0" | |
1093 | " is useful for hot add of devices using hotmod."); | |
1da177e4 LT |
1094 | |
1095 | ||
b0defcdb | 1096 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1097 | { |
b0defcdb CM |
1098 | if (info->si_type == SI_BT) |
1099 | /* Disable the interrupt in the BT interface. */ | |
1100 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1101 | free_irq(info->irq, info); | |
1da177e4 | 1102 | } |
1da177e4 LT |
1103 | |
1104 | static int std_irq_setup(struct smi_info *info) | |
1105 | { | |
1106 | int rv; | |
1107 | ||
b0defcdb | 1108 | if (!info->irq) |
1da177e4 LT |
1109 | return 0; |
1110 | ||
9dbf68f9 CM |
1111 | if (info->si_type == SI_BT) { |
1112 | rv = request_irq(info->irq, | |
1113 | si_bt_irq_handler, | |
0f2ed4c6 | 1114 | IRQF_DISABLED, |
9dbf68f9 CM |
1115 | DEVICE_NAME, |
1116 | info); | |
b0defcdb | 1117 | if (!rv) |
9dbf68f9 CM |
1118 | /* Enable the interrupt in the BT interface. */ |
1119 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1120 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1121 | } else | |
1122 | rv = request_irq(info->irq, | |
1123 | si_irq_handler, | |
0f2ed4c6 | 1124 | IRQF_DISABLED, |
9dbf68f9 CM |
1125 | DEVICE_NAME, |
1126 | info); | |
1da177e4 LT |
1127 | if (rv) { |
1128 | printk(KERN_WARNING | |
1129 | "ipmi_si: %s unable to claim interrupt %d," | |
1130 | " running polled\n", | |
1131 | DEVICE_NAME, info->irq); | |
1132 | info->irq = 0; | |
1133 | } else { | |
b0defcdb | 1134 | info->irq_cleanup = std_irq_cleanup; |
1da177e4 LT |
1135 | printk(" Using irq %d\n", info->irq); |
1136 | } | |
1137 | ||
1138 | return rv; | |
1139 | } | |
1140 | ||
1da177e4 LT |
1141 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1142 | { | |
b0defcdb | 1143 | unsigned int addr = io->addr_data; |
1da177e4 | 1144 | |
b0defcdb | 1145 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1146 | } |
1147 | ||
1148 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1149 | unsigned char b) | |
1150 | { | |
b0defcdb | 1151 | unsigned int addr = io->addr_data; |
1da177e4 | 1152 | |
b0defcdb | 1153 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1157 | { | |
b0defcdb | 1158 | unsigned int addr = io->addr_data; |
1da177e4 | 1159 | |
b0defcdb | 1160 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1161 | } |
1162 | ||
1163 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1164 | unsigned char b) | |
1165 | { | |
b0defcdb | 1166 | unsigned int addr = io->addr_data; |
1da177e4 | 1167 | |
b0defcdb | 1168 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1169 | } |
1170 | ||
1171 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1172 | { | |
b0defcdb | 1173 | unsigned int addr = io->addr_data; |
1da177e4 | 1174 | |
b0defcdb | 1175 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1176 | } |
1177 | ||
1178 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1179 | unsigned char b) | |
1180 | { | |
b0defcdb | 1181 | unsigned int addr = io->addr_data; |
1da177e4 | 1182 | |
b0defcdb | 1183 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1184 | } |
1185 | ||
1186 | static void port_cleanup(struct smi_info *info) | |
1187 | { | |
b0defcdb | 1188 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1189 | int idx; |
1da177e4 | 1190 | |
b0defcdb | 1191 | if (addr) { |
d61a3ead CM |
1192 | for (idx = 0; idx < info->io_size; idx++) { |
1193 | release_region(addr + idx * info->io.regspacing, | |
1194 | info->io.regsize); | |
1195 | } | |
1da177e4 | 1196 | } |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | static int port_setup(struct smi_info *info) | |
1200 | { | |
b0defcdb | 1201 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1202 | int idx; |
1da177e4 | 1203 | |
b0defcdb | 1204 | if (!addr) |
1da177e4 LT |
1205 | return -ENODEV; |
1206 | ||
1207 | info->io_cleanup = port_cleanup; | |
1208 | ||
1209 | /* Figure out the actual inb/inw/inl/etc routine to use based | |
1210 | upon the register size. */ | |
1211 | switch (info->io.regsize) { | |
1212 | case 1: | |
1213 | info->io.inputb = port_inb; | |
1214 | info->io.outputb = port_outb; | |
1215 | break; | |
1216 | case 2: | |
1217 | info->io.inputb = port_inw; | |
1218 | info->io.outputb = port_outw; | |
1219 | break; | |
1220 | case 4: | |
1221 | info->io.inputb = port_inl; | |
1222 | info->io.outputb = port_outl; | |
1223 | break; | |
1224 | default: | |
1225 | printk("ipmi_si: Invalid register size: %d\n", | |
1226 | info->io.regsize); | |
1227 | return -EINVAL; | |
1228 | } | |
1229 | ||
d61a3ead CM |
1230 | /* Some BIOSes reserve disjoint I/O regions in their ACPI |
1231 | * tables. This causes problems when trying to register the | |
1232 | * entire I/O region. Therefore we must register each I/O | |
1233 | * port separately. | |
1234 | */ | |
1235 | for (idx = 0; idx < info->io_size; idx++) { | |
1236 | if (request_region(addr + idx * info->io.regspacing, | |
1237 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1238 | /* Undo allocations */ | |
1239 | while (idx--) { | |
1240 | release_region(addr + idx * info->io.regspacing, | |
1241 | info->io.regsize); | |
1242 | } | |
1243 | return -EIO; | |
1244 | } | |
1245 | } | |
1da177e4 LT |
1246 | return 0; |
1247 | } | |
1248 | ||
546cfdf4 | 1249 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1250 | { |
1251 | return readb((io->addr)+(offset * io->regspacing)); | |
1252 | } | |
1253 | ||
546cfdf4 | 1254 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1255 | unsigned char b) |
1256 | { | |
1257 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1258 | } | |
1259 | ||
546cfdf4 | 1260 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1261 | { |
1262 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1263 | & 0xff; |
1da177e4 LT |
1264 | } |
1265 | ||
546cfdf4 | 1266 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1267 | unsigned char b) |
1268 | { | |
1269 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1270 | } | |
1271 | ||
546cfdf4 | 1272 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1273 | { |
1274 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1275 | & 0xff; |
1da177e4 LT |
1276 | } |
1277 | ||
546cfdf4 | 1278 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1279 | unsigned char b) |
1280 | { | |
1281 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1282 | } | |
1283 | ||
1284 | #ifdef readq | |
1285 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1286 | { | |
1287 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1288 | & 0xff; |
1da177e4 LT |
1289 | } |
1290 | ||
1291 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1292 | unsigned char b) | |
1293 | { | |
1294 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1295 | } | |
1296 | #endif | |
1297 | ||
1298 | static void mem_cleanup(struct smi_info *info) | |
1299 | { | |
b0defcdb | 1300 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1301 | int mapsize; |
1302 | ||
1303 | if (info->io.addr) { | |
1304 | iounmap(info->io.addr); | |
1305 | ||
1306 | mapsize = ((info->io_size * info->io.regspacing) | |
1307 | - (info->io.regspacing - info->io.regsize)); | |
1308 | ||
b0defcdb | 1309 | release_mem_region(addr, mapsize); |
1da177e4 | 1310 | } |
1da177e4 LT |
1311 | } |
1312 | ||
1313 | static int mem_setup(struct smi_info *info) | |
1314 | { | |
b0defcdb | 1315 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1316 | int mapsize; |
1317 | ||
b0defcdb | 1318 | if (!addr) |
1da177e4 LT |
1319 | return -ENODEV; |
1320 | ||
1321 | info->io_cleanup = mem_cleanup; | |
1322 | ||
1323 | /* Figure out the actual readb/readw/readl/etc routine to use based | |
1324 | upon the register size. */ | |
1325 | switch (info->io.regsize) { | |
1326 | case 1: | |
546cfdf4 AD |
1327 | info->io.inputb = intf_mem_inb; |
1328 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1329 | break; |
1330 | case 2: | |
546cfdf4 AD |
1331 | info->io.inputb = intf_mem_inw; |
1332 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1333 | break; |
1334 | case 4: | |
546cfdf4 AD |
1335 | info->io.inputb = intf_mem_inl; |
1336 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1337 | break; |
1338 | #ifdef readq | |
1339 | case 8: | |
1340 | info->io.inputb = mem_inq; | |
1341 | info->io.outputb = mem_outq; | |
1342 | break; | |
1343 | #endif | |
1344 | default: | |
1345 | printk("ipmi_si: Invalid register size: %d\n", | |
1346 | info->io.regsize); | |
1347 | return -EINVAL; | |
1348 | } | |
1349 | ||
1350 | /* Calculate the total amount of memory to claim. This is an | |
1351 | * unusual looking calculation, but it avoids claiming any | |
1352 | * more memory than it has to. It will claim everything | |
1353 | * between the first address to the end of the last full | |
1354 | * register. */ | |
1355 | mapsize = ((info->io_size * info->io.regspacing) | |
1356 | - (info->io.regspacing - info->io.regsize)); | |
1357 | ||
b0defcdb | 1358 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1359 | return -EIO; |
1360 | ||
b0defcdb | 1361 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1362 | if (info->io.addr == NULL) { |
b0defcdb | 1363 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1364 | return -EIO; |
1365 | } | |
1366 | return 0; | |
1367 | } | |
1368 | ||
b361e27b CM |
1369 | /* |
1370 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1371 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1372 | * Options are: | |
1373 | * rsp=<regspacing> | |
1374 | * rsi=<regsize> | |
1375 | * rsh=<regshift> | |
1376 | * irq=<irq> | |
1377 | * ipmb=<ipmb addr> | |
1378 | */ | |
1379 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1380 | struct hotmod_vals { | |
1381 | char *name; | |
1382 | int val; | |
1383 | }; | |
1384 | static struct hotmod_vals hotmod_ops[] = { | |
1385 | { "add", HM_ADD }, | |
1386 | { "remove", HM_REMOVE }, | |
1387 | { NULL } | |
1388 | }; | |
1389 | static struct hotmod_vals hotmod_si[] = { | |
1390 | { "kcs", SI_KCS }, | |
1391 | { "smic", SI_SMIC }, | |
1392 | { "bt", SI_BT }, | |
1393 | { NULL } | |
1394 | }; | |
1395 | static struct hotmod_vals hotmod_as[] = { | |
1396 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1397 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1398 | { NULL } | |
1399 | }; | |
1d5636cc | 1400 | |
b361e27b CM |
1401 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1402 | { | |
1403 | char *s; | |
1404 | int i; | |
1405 | ||
1406 | s = strchr(*curr, ','); | |
1407 | if (!s) { | |
1408 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1409 | return -EINVAL; | |
1410 | } | |
1411 | *s = '\0'; | |
1412 | s++; | |
1413 | for (i = 0; hotmod_ops[i].name; i++) { | |
1d5636cc | 1414 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1415 | *val = v[i].val; |
1416 | *curr = s; | |
1417 | return 0; | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1422 | return -EINVAL; | |
1423 | } | |
1424 | ||
1d5636cc CM |
1425 | static int check_hotmod_int_op(const char *curr, const char *option, |
1426 | const char *name, int *val) | |
1427 | { | |
1428 | char *n; | |
1429 | ||
1430 | if (strcmp(curr, name) == 0) { | |
1431 | if (!option) { | |
1432 | printk(KERN_WARNING PFX | |
1433 | "No option given for '%s'\n", | |
1434 | curr); | |
1435 | return -EINVAL; | |
1436 | } | |
1437 | *val = simple_strtoul(option, &n, 0); | |
1438 | if ((*n != '\0') || (*option == '\0')) { | |
1439 | printk(KERN_WARNING PFX | |
1440 | "Bad option given for '%s'\n", | |
1441 | curr); | |
1442 | return -EINVAL; | |
1443 | } | |
1444 | return 1; | |
1445 | } | |
1446 | return 0; | |
1447 | } | |
1448 | ||
b361e27b CM |
1449 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1450 | { | |
1451 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1452 | int rv; |
b361e27b CM |
1453 | char *next, *curr, *s, *n, *o; |
1454 | enum hotmod_op op; | |
1455 | enum si_type si_type; | |
1456 | int addr_space; | |
1457 | unsigned long addr; | |
1458 | int regspacing; | |
1459 | int regsize; | |
1460 | int regshift; | |
1461 | int irq; | |
1462 | int ipmb; | |
1463 | int ival; | |
1d5636cc | 1464 | int len; |
b361e27b CM |
1465 | struct smi_info *info; |
1466 | ||
1467 | if (!str) | |
1468 | return -ENOMEM; | |
1469 | ||
1470 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1471 | len = strlen(str); |
1472 | ival = len - 1; | |
b361e27b CM |
1473 | while ((ival >= 0) && isspace(str[ival])) { |
1474 | str[ival] = '\0'; | |
1475 | ival--; | |
1476 | } | |
1477 | ||
1478 | for (curr = str; curr; curr = next) { | |
1479 | regspacing = 1; | |
1480 | regsize = 1; | |
1481 | regshift = 0; | |
1482 | irq = 0; | |
1483 | ipmb = 0x20; | |
1484 | ||
1485 | next = strchr(curr, ':'); | |
1486 | if (next) { | |
1487 | *next = '\0'; | |
1488 | next++; | |
1489 | } | |
1490 | ||
1491 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1492 | if (rv) | |
1493 | break; | |
1494 | op = ival; | |
1495 | ||
1496 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1497 | if (rv) | |
1498 | break; | |
1499 | si_type = ival; | |
1500 | ||
1501 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1502 | if (rv) | |
1503 | break; | |
1504 | ||
1505 | s = strchr(curr, ','); | |
1506 | if (s) { | |
1507 | *s = '\0'; | |
1508 | s++; | |
1509 | } | |
1510 | addr = simple_strtoul(curr, &n, 0); | |
1511 | if ((*n != '\0') || (*curr == '\0')) { | |
1512 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1513 | " '%s'\n", curr); | |
1514 | break; | |
1515 | } | |
1516 | ||
1517 | while (s) { | |
1518 | curr = s; | |
1519 | s = strchr(curr, ','); | |
1520 | if (s) { | |
1521 | *s = '\0'; | |
1522 | s++; | |
1523 | } | |
1524 | o = strchr(curr, '='); | |
1525 | if (o) { | |
1526 | *o = '\0'; | |
1527 | o++; | |
1528 | } | |
1d5636cc CM |
1529 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1530 | if (rv < 0) | |
b361e27b | 1531 | goto out; |
1d5636cc CM |
1532 | else if (rv) |
1533 | continue; | |
1534 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1535 | if (rv < 0) | |
1536 | goto out; | |
1537 | else if (rv) | |
1538 | continue; | |
1539 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1540 | if (rv < 0) | |
1541 | goto out; | |
1542 | else if (rv) | |
1543 | continue; | |
1544 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1545 | if (rv < 0) | |
1546 | goto out; | |
1547 | else if (rv) | |
1548 | continue; | |
1549 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1550 | if (rv < 0) | |
1551 | goto out; | |
1552 | else if (rv) | |
1553 | continue; | |
1554 | ||
1555 | rv = -EINVAL; | |
1556 | printk(KERN_WARNING PFX | |
1557 | "Invalid hotmod option '%s'\n", | |
1558 | curr); | |
1559 | goto out; | |
b361e27b CM |
1560 | } |
1561 | ||
1562 | if (op == HM_ADD) { | |
1563 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1564 | if (!info) { | |
1565 | rv = -ENOMEM; | |
1566 | goto out; | |
1567 | } | |
1568 | ||
1569 | info->addr_source = "hotmod"; | |
1570 | info->si_type = si_type; | |
1571 | info->io.addr_data = addr; | |
1572 | info->io.addr_type = addr_space; | |
1573 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1574 | info->io_setup = mem_setup; | |
1575 | else | |
1576 | info->io_setup = port_setup; | |
1577 | ||
1578 | info->io.addr = NULL; | |
1579 | info->io.regspacing = regspacing; | |
1580 | if (!info->io.regspacing) | |
1581 | info->io.regspacing = DEFAULT_REGSPACING; | |
1582 | info->io.regsize = regsize; | |
1583 | if (!info->io.regsize) | |
1584 | info->io.regsize = DEFAULT_REGSPACING; | |
1585 | info->io.regshift = regshift; | |
1586 | info->irq = irq; | |
1587 | if (info->irq) | |
1588 | info->irq_setup = std_irq_setup; | |
1589 | info->slave_addr = ipmb; | |
1590 | ||
1591 | try_smi_init(info); | |
1592 | } else { | |
1593 | /* remove */ | |
1594 | struct smi_info *e, *tmp_e; | |
1595 | ||
1596 | mutex_lock(&smi_infos_lock); | |
1597 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1598 | if (e->io.addr_type != addr_space) | |
1599 | continue; | |
1600 | if (e->si_type != si_type) | |
1601 | continue; | |
1602 | if (e->io.addr_data == addr) | |
1603 | cleanup_one_si(e); | |
1604 | } | |
1605 | mutex_unlock(&smi_infos_lock); | |
1606 | } | |
1607 | } | |
1d5636cc | 1608 | rv = len; |
b361e27b CM |
1609 | out: |
1610 | kfree(str); | |
1611 | return rv; | |
1612 | } | |
b0defcdb CM |
1613 | |
1614 | static __devinit void hardcode_find_bmc(void) | |
1da177e4 | 1615 | { |
b0defcdb | 1616 | int i; |
1da177e4 LT |
1617 | struct smi_info *info; |
1618 | ||
b0defcdb CM |
1619 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1620 | if (!ports[i] && !addrs[i]) | |
1621 | continue; | |
1da177e4 | 1622 | |
b0defcdb CM |
1623 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1624 | if (!info) | |
1625 | return; | |
1da177e4 | 1626 | |
b0defcdb | 1627 | info->addr_source = "hardcoded"; |
1da177e4 | 1628 | |
1d5636cc | 1629 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1630 | info->si_type = SI_KCS; |
1d5636cc | 1631 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1632 | info->si_type = SI_SMIC; |
1d5636cc | 1633 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1634 | info->si_type = SI_BT; |
1635 | } else { | |
1636 | printk(KERN_WARNING | |
1637 | "ipmi_si: Interface type specified " | |
1638 | "for interface %d, was invalid: %s\n", | |
1639 | i, si_type[i]); | |
1640 | kfree(info); | |
1641 | continue; | |
1642 | } | |
1da177e4 | 1643 | |
b0defcdb CM |
1644 | if (ports[i]) { |
1645 | /* An I/O port */ | |
1646 | info->io_setup = port_setup; | |
1647 | info->io.addr_data = ports[i]; | |
1648 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1649 | } else if (addrs[i]) { | |
1650 | /* A memory port */ | |
1651 | info->io_setup = mem_setup; | |
1652 | info->io.addr_data = addrs[i]; | |
1653 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1654 | } else { | |
1655 | printk(KERN_WARNING | |
1656 | "ipmi_si: Interface type specified " | |
1657 | "for interface %d, " | |
1658 | "but port and address were not set or " | |
1659 | "set to zero.\n", i); | |
1660 | kfree(info); | |
1661 | continue; | |
1662 | } | |
1da177e4 | 1663 | |
b0defcdb CM |
1664 | info->io.addr = NULL; |
1665 | info->io.regspacing = regspacings[i]; | |
1666 | if (!info->io.regspacing) | |
1667 | info->io.regspacing = DEFAULT_REGSPACING; | |
1668 | info->io.regsize = regsizes[i]; | |
1669 | if (!info->io.regsize) | |
1670 | info->io.regsize = DEFAULT_REGSPACING; | |
1671 | info->io.regshift = regshifts[i]; | |
1672 | info->irq = irqs[i]; | |
1673 | if (info->irq) | |
1674 | info->irq_setup = std_irq_setup; | |
1da177e4 | 1675 | |
b0defcdb CM |
1676 | try_smi_init(info); |
1677 | } | |
1678 | } | |
1da177e4 | 1679 | |
8466361a | 1680 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1681 | |
1682 | #include <linux/acpi.h> | |
1683 | ||
1684 | /* Once we get an ACPI failure, we don't try any more, because we go | |
1685 | through the tables sequentially. Once we don't find a table, there | |
1686 | are no more. */ | |
0c8204b3 | 1687 | static int acpi_failure; |
1da177e4 LT |
1688 | |
1689 | /* For GPE-type interrupts. */ | |
1690 | static u32 ipmi_acpi_gpe(void *context) | |
1691 | { | |
1692 | struct smi_info *smi_info = context; | |
1693 | unsigned long flags; | |
1694 | #ifdef DEBUG_TIMING | |
1695 | struct timeval t; | |
1696 | #endif | |
1697 | ||
1698 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1699 | ||
1700 | spin_lock(&smi_info->count_lock); | |
1701 | smi_info->interrupts++; | |
1702 | spin_unlock(&smi_info->count_lock); | |
1703 | ||
a9a2c44f | 1704 | if (atomic_read(&smi_info->stop_operation)) |
1da177e4 LT |
1705 | goto out; |
1706 | ||
1707 | #ifdef DEBUG_TIMING | |
1708 | do_gettimeofday(&t); | |
1709 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1710 | #endif | |
1711 | smi_event_handler(smi_info, 0); | |
1712 | out: | |
1713 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1714 | ||
1715 | return ACPI_INTERRUPT_HANDLED; | |
1716 | } | |
1717 | ||
b0defcdb CM |
1718 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
1719 | { | |
1720 | if (!info->irq) | |
1721 | return; | |
1722 | ||
1723 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1724 | } | |
1725 | ||
1da177e4 LT |
1726 | static int acpi_gpe_irq_setup(struct smi_info *info) |
1727 | { | |
1728 | acpi_status status; | |
1729 | ||
b0defcdb | 1730 | if (!info->irq) |
1da177e4 LT |
1731 | return 0; |
1732 | ||
1733 | /* FIXME - is level triggered right? */ | |
1734 | status = acpi_install_gpe_handler(NULL, | |
1735 | info->irq, | |
1736 | ACPI_GPE_LEVEL_TRIGGERED, | |
1737 | &ipmi_acpi_gpe, | |
1738 | info); | |
1739 | if (status != AE_OK) { | |
1740 | printk(KERN_WARNING | |
1741 | "ipmi_si: %s unable to claim ACPI GPE %d," | |
1742 | " running polled\n", | |
1743 | DEVICE_NAME, info->irq); | |
1744 | info->irq = 0; | |
1745 | return -EINVAL; | |
1746 | } else { | |
b0defcdb | 1747 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
1da177e4 LT |
1748 | printk(" Using ACPI GPE %d\n", info->irq); |
1749 | return 0; | |
1750 | } | |
1751 | } | |
1752 | ||
1da177e4 LT |
1753 | /* |
1754 | * Defined at | |
1755 | * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/Docs/TechPapers/IA64/hpspmi.pdf | |
1756 | */ | |
1757 | struct SPMITable { | |
1758 | s8 Signature[4]; | |
1759 | u32 Length; | |
1760 | u8 Revision; | |
1761 | u8 Checksum; | |
1762 | s8 OEMID[6]; | |
1763 | s8 OEMTableID[8]; | |
1764 | s8 OEMRevision[4]; | |
1765 | s8 CreatorID[4]; | |
1766 | s8 CreatorRevision[4]; | |
1767 | u8 InterfaceType; | |
1768 | u8 IPMIlegacy; | |
1769 | s16 SpecificationRevision; | |
1770 | ||
1771 | /* | |
1772 | * Bit 0 - SCI interrupt supported | |
1773 | * Bit 1 - I/O APIC/SAPIC | |
1774 | */ | |
1775 | u8 InterruptType; | |
1776 | ||
1777 | /* If bit 0 of InterruptType is set, then this is the SCI | |
1778 | interrupt in the GPEx_STS register. */ | |
1779 | u8 GPE; | |
1780 | ||
1781 | s16 Reserved; | |
1782 | ||
1783 | /* If bit 1 of InterruptType is set, then this is the I/O | |
1784 | APIC/SAPIC interrupt. */ | |
1785 | u32 GlobalSystemInterrupt; | |
1786 | ||
1787 | /* The actual register address. */ | |
1788 | struct acpi_generic_address addr; | |
1789 | ||
1790 | u8 UID[4]; | |
1791 | ||
1792 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
1793 | }; | |
1794 | ||
b0defcdb | 1795 | static __devinit int try_init_acpi(struct SPMITable *spmi) |
1da177e4 LT |
1796 | { |
1797 | struct smi_info *info; | |
1da177e4 LT |
1798 | u8 addr_space; |
1799 | ||
1da177e4 LT |
1800 | if (spmi->IPMIlegacy != 1) { |
1801 | printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy); | |
1802 | return -ENODEV; | |
1803 | } | |
1804 | ||
15a58ed1 | 1805 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
1da177e4 LT |
1806 | addr_space = IPMI_MEM_ADDR_SPACE; |
1807 | else | |
1808 | addr_space = IPMI_IO_ADDR_SPACE; | |
b0defcdb CM |
1809 | |
1810 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1811 | if (!info) { | |
1812 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n"); | |
1813 | return -ENOMEM; | |
1814 | } | |
1815 | ||
1816 | info->addr_source = "ACPI"; | |
1da177e4 | 1817 | |
1da177e4 LT |
1818 | /* Figure out the interface type. */ |
1819 | switch (spmi->InterfaceType) | |
1820 | { | |
1821 | case 1: /* KCS */ | |
b0defcdb | 1822 | info->si_type = SI_KCS; |
1da177e4 | 1823 | break; |
1da177e4 | 1824 | case 2: /* SMIC */ |
b0defcdb | 1825 | info->si_type = SI_SMIC; |
1da177e4 | 1826 | break; |
1da177e4 | 1827 | case 3: /* BT */ |
b0defcdb | 1828 | info->si_type = SI_BT; |
1da177e4 | 1829 | break; |
1da177e4 LT |
1830 | default: |
1831 | printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n", | |
1832 | spmi->InterfaceType); | |
b0defcdb | 1833 | kfree(info); |
1da177e4 LT |
1834 | return -EIO; |
1835 | } | |
1836 | ||
1da177e4 LT |
1837 | if (spmi->InterruptType & 1) { |
1838 | /* We've got a GPE interrupt. */ | |
1839 | info->irq = spmi->GPE; | |
1840 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
1841 | } else if (spmi->InterruptType & 2) { |
1842 | /* We've got an APIC/SAPIC interrupt. */ | |
1843 | info->irq = spmi->GlobalSystemInterrupt; | |
1844 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
1845 | } else { |
1846 | /* Use the default interrupt setting. */ | |
1847 | info->irq = 0; | |
1848 | info->irq_setup = NULL; | |
1849 | } | |
1850 | ||
15a58ed1 | 1851 | if (spmi->addr.bit_width) { |
35bc37a0 | 1852 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 1853 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 1854 | } else { |
35bc37a0 CM |
1855 | info->io.regspacing = DEFAULT_REGSPACING; |
1856 | } | |
b0defcdb | 1857 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 1858 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 1859 | |
15a58ed1 | 1860 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 1861 | info->io_setup = mem_setup; |
b0defcdb | 1862 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
15a58ed1 | 1863 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 1864 | info->io_setup = port_setup; |
b0defcdb | 1865 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
1da177e4 LT |
1866 | } else { |
1867 | kfree(info); | |
1868 | printk("ipmi_si: Unknown ACPI I/O Address type\n"); | |
1869 | return -EIO; | |
1870 | } | |
b0defcdb | 1871 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 1872 | |
b0defcdb | 1873 | try_smi_init(info); |
1da177e4 | 1874 | |
1da177e4 LT |
1875 | return 0; |
1876 | } | |
b0defcdb CM |
1877 | |
1878 | static __devinit void acpi_find_bmc(void) | |
1879 | { | |
1880 | acpi_status status; | |
1881 | struct SPMITable *spmi; | |
1882 | int i; | |
1883 | ||
1884 | if (acpi_disabled) | |
1885 | return; | |
1886 | ||
1887 | if (acpi_failure) | |
1888 | return; | |
1889 | ||
1890 | for (i = 0; ; i++) { | |
15a58ed1 AS |
1891 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
1892 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
1893 | if (status != AE_OK) |
1894 | return; | |
1895 | ||
1896 | try_init_acpi(spmi); | |
1897 | } | |
1898 | } | |
1da177e4 LT |
1899 | #endif |
1900 | ||
a9fad4cc | 1901 | #ifdef CONFIG_DMI |
b0defcdb | 1902 | struct dmi_ipmi_data |
1da177e4 LT |
1903 | { |
1904 | u8 type; | |
1905 | u8 addr_space; | |
1906 | unsigned long base_addr; | |
1907 | u8 irq; | |
1908 | u8 offset; | |
1909 | u8 slave_addr; | |
b0defcdb | 1910 | }; |
1da177e4 | 1911 | |
b0defcdb CM |
1912 | static int __devinit decode_dmi(struct dmi_header *dm, |
1913 | struct dmi_ipmi_data *dmi) | |
1da177e4 | 1914 | { |
e8b33617 | 1915 | u8 *data = (u8 *)dm; |
1da177e4 LT |
1916 | unsigned long base_addr; |
1917 | u8 reg_spacing; | |
b224cd3a | 1918 | u8 len = dm->length; |
1da177e4 | 1919 | |
b0defcdb | 1920 | dmi->type = data[4]; |
1da177e4 LT |
1921 | |
1922 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
1923 | if (len >= 0x11) { | |
1924 | if (base_addr & 1) { | |
1925 | /* I/O */ | |
1926 | base_addr &= 0xFFFE; | |
b0defcdb | 1927 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
1928 | } |
1929 | else { | |
1930 | /* Memory */ | |
b0defcdb | 1931 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
1da177e4 LT |
1932 | } |
1933 | /* If bit 4 of byte 0x10 is set, then the lsb for the address | |
1934 | is odd. */ | |
b0defcdb | 1935 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 1936 | |
b0defcdb | 1937 | dmi->irq = data[0x11]; |
1da177e4 LT |
1938 | |
1939 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 1940 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
1da177e4 LT |
1941 | switch(reg_spacing){ |
1942 | case 0x00: /* Byte boundaries */ | |
b0defcdb | 1943 | dmi->offset = 1; |
1da177e4 LT |
1944 | break; |
1945 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 1946 | dmi->offset = 4; |
1da177e4 LT |
1947 | break; |
1948 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 1949 | dmi->offset = 16; |
1da177e4 LT |
1950 | break; |
1951 | default: | |
1952 | /* Some other interface, just ignore it. */ | |
1953 | return -EIO; | |
1954 | } | |
1955 | } else { | |
1956 | /* Old DMI spec. */ | |
92068801 CM |
1957 | /* Note that technically, the lower bit of the base |
1958 | * address should be 1 if the address is I/O and 0 if | |
1959 | * the address is in memory. So many systems get that | |
1960 | * wrong (and all that I have seen are I/O) so we just | |
1961 | * ignore that bit and assume I/O. Systems that use | |
1962 | * memory should use the newer spec, anyway. */ | |
b0defcdb CM |
1963 | dmi->base_addr = base_addr & 0xfffe; |
1964 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
1965 | dmi->offset = 1; | |
1da177e4 LT |
1966 | } |
1967 | ||
b0defcdb | 1968 | dmi->slave_addr = data[6]; |
1da177e4 | 1969 | |
b0defcdb | 1970 | return 0; |
1da177e4 LT |
1971 | } |
1972 | ||
b0defcdb | 1973 | static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 1974 | { |
b0defcdb | 1975 | struct smi_info *info; |
1da177e4 | 1976 | |
b0defcdb CM |
1977 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1978 | if (!info) { | |
1979 | printk(KERN_ERR | |
1980 | "ipmi_si: Could not allocate SI data\n"); | |
1981 | return; | |
1da177e4 | 1982 | } |
1da177e4 | 1983 | |
b0defcdb | 1984 | info->addr_source = "SMBIOS"; |
1da177e4 | 1985 | |
e8b33617 | 1986 | switch (ipmi_data->type) { |
b0defcdb CM |
1987 | case 0x01: /* KCS */ |
1988 | info->si_type = SI_KCS; | |
1989 | break; | |
1990 | case 0x02: /* SMIC */ | |
1991 | info->si_type = SI_SMIC; | |
1992 | break; | |
1993 | case 0x03: /* BT */ | |
1994 | info->si_type = SI_BT; | |
1995 | break; | |
1996 | default: | |
1997 | return; | |
1da177e4 | 1998 | } |
1da177e4 | 1999 | |
b0defcdb CM |
2000 | switch (ipmi_data->addr_space) { |
2001 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2002 | info->io_setup = mem_setup; |
b0defcdb CM |
2003 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2004 | break; | |
2005 | ||
2006 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2007 | info->io_setup = port_setup; |
b0defcdb CM |
2008 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2009 | break; | |
2010 | ||
2011 | default: | |
1da177e4 | 2012 | kfree(info); |
b0defcdb CM |
2013 | printk(KERN_WARNING |
2014 | "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n", | |
2015 | ipmi_data->addr_space); | |
2016 | return; | |
1da177e4 | 2017 | } |
b0defcdb | 2018 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2019 | |
b0defcdb CM |
2020 | info->io.regspacing = ipmi_data->offset; |
2021 | if (!info->io.regspacing) | |
1da177e4 LT |
2022 | info->io.regspacing = DEFAULT_REGSPACING; |
2023 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2024 | info->io.regshift = 0; |
1da177e4 LT |
2025 | |
2026 | info->slave_addr = ipmi_data->slave_addr; | |
2027 | ||
b0defcdb CM |
2028 | info->irq = ipmi_data->irq; |
2029 | if (info->irq) | |
2030 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2031 | |
b0defcdb CM |
2032 | try_smi_init(info); |
2033 | } | |
1da177e4 | 2034 | |
b0defcdb CM |
2035 | static void __devinit dmi_find_bmc(void) |
2036 | { | |
2037 | struct dmi_device *dev = NULL; | |
2038 | struct dmi_ipmi_data data; | |
2039 | int rv; | |
2040 | ||
2041 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2042 | memset(&data, 0, sizeof(data)); |
b0defcdb CM |
2043 | rv = decode_dmi((struct dmi_header *) dev->device_data, &data); |
2044 | if (!rv) | |
2045 | try_init_dmi(&data); | |
2046 | } | |
1da177e4 | 2047 | } |
a9fad4cc | 2048 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2049 | |
2050 | #ifdef CONFIG_PCI | |
2051 | ||
b0defcdb CM |
2052 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2053 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2054 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2055 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2056 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2057 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2058 | ||
1da177e4 LT |
2059 | #define PCI_HP_VENDOR_ID 0x103C |
2060 | #define PCI_MMC_DEVICE_ID 0x121A | |
2061 | #define PCI_MMC_ADDR_CW 0x10 | |
2062 | ||
b0defcdb CM |
2063 | static void ipmi_pci_cleanup(struct smi_info *info) |
2064 | { | |
2065 | struct pci_dev *pdev = info->addr_source_data; | |
2066 | ||
2067 | pci_disable_device(pdev); | |
2068 | } | |
1da177e4 | 2069 | |
b0defcdb CM |
2070 | static int __devinit ipmi_pci_probe(struct pci_dev *pdev, |
2071 | const struct pci_device_id *ent) | |
1da177e4 | 2072 | { |
b0defcdb CM |
2073 | int rv; |
2074 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2075 | struct smi_info *info; | |
2076 | int first_reg_offset = 0; | |
1da177e4 | 2077 | |
b0defcdb CM |
2078 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2079 | if (!info) | |
1cd441f9 | 2080 | return -ENOMEM; |
1da177e4 | 2081 | |
b0defcdb | 2082 | info->addr_source = "PCI"; |
1da177e4 | 2083 | |
b0defcdb CM |
2084 | switch (class_type) { |
2085 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2086 | info->si_type = SI_SMIC; | |
2087 | break; | |
1da177e4 | 2088 | |
b0defcdb CM |
2089 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2090 | info->si_type = SI_KCS; | |
2091 | break; | |
2092 | ||
2093 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2094 | info->si_type = SI_BT; | |
2095 | break; | |
2096 | ||
2097 | default: | |
2098 | kfree(info); | |
2099 | printk(KERN_INFO "ipmi_si: %s: Unknown IPMI type: %d\n", | |
2100 | pci_name(pdev), class_type); | |
1cd441f9 | 2101 | return -ENOMEM; |
1da177e4 LT |
2102 | } |
2103 | ||
b0defcdb CM |
2104 | rv = pci_enable_device(pdev); |
2105 | if (rv) { | |
2106 | printk(KERN_ERR "ipmi_si: %s: couldn't enable PCI device\n", | |
2107 | pci_name(pdev)); | |
2108 | kfree(info); | |
2109 | return rv; | |
1da177e4 LT |
2110 | } |
2111 | ||
b0defcdb CM |
2112 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2113 | info->addr_source_data = pdev; | |
1da177e4 | 2114 | |
b0defcdb CM |
2115 | if (pdev->subsystem_vendor == PCI_HP_VENDOR_ID) |
2116 | first_reg_offset = 1; | |
1da177e4 | 2117 | |
b0defcdb CM |
2118 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2119 | info->io_setup = port_setup; | |
2120 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2121 | } else { | |
2122 | info->io_setup = mem_setup; | |
2123 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2124 | } |
b0defcdb | 2125 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2126 | |
b0defcdb | 2127 | info->io.regspacing = DEFAULT_REGSPACING; |
1da177e4 | 2128 | info->io.regsize = DEFAULT_REGSPACING; |
b0defcdb | 2129 | info->io.regshift = 0; |
1da177e4 | 2130 | |
b0defcdb CM |
2131 | info->irq = pdev->irq; |
2132 | if (info->irq) | |
2133 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2134 | |
50c812b2 CM |
2135 | info->dev = &pdev->dev; |
2136 | ||
b0defcdb CM |
2137 | return try_smi_init(info); |
2138 | } | |
1da177e4 | 2139 | |
b0defcdb CM |
2140 | static void __devexit ipmi_pci_remove(struct pci_dev *pdev) |
2141 | { | |
2142 | } | |
1da177e4 | 2143 | |
b0defcdb CM |
2144 | #ifdef CONFIG_PM |
2145 | static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
2146 | { | |
1da177e4 LT |
2147 | return 0; |
2148 | } | |
1da177e4 | 2149 | |
b0defcdb | 2150 | static int ipmi_pci_resume(struct pci_dev *pdev) |
1da177e4 | 2151 | { |
b0defcdb CM |
2152 | return 0; |
2153 | } | |
1da177e4 | 2154 | #endif |
1da177e4 | 2155 | |
b0defcdb CM |
2156 | static struct pci_device_id ipmi_pci_devices[] = { |
2157 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
d13adb60 | 2158 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) } |
b0defcdb CM |
2159 | }; |
2160 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2161 | ||
2162 | static struct pci_driver ipmi_pci_driver = { | |
2163 | .name = DEVICE_NAME, | |
2164 | .id_table = ipmi_pci_devices, | |
2165 | .probe = ipmi_pci_probe, | |
2166 | .remove = __devexit_p(ipmi_pci_remove), | |
2167 | #ifdef CONFIG_PM | |
2168 | .suspend = ipmi_pci_suspend, | |
2169 | .resume = ipmi_pci_resume, | |
2170 | #endif | |
2171 | }; | |
2172 | #endif /* CONFIG_PCI */ | |
1da177e4 LT |
2173 | |
2174 | ||
2175 | static int try_get_dev_id(struct smi_info *smi_info) | |
2176 | { | |
50c812b2 CM |
2177 | unsigned char msg[2]; |
2178 | unsigned char *resp; | |
2179 | unsigned long resp_len; | |
2180 | enum si_sm_result smi_result; | |
2181 | int rv = 0; | |
1da177e4 LT |
2182 | |
2183 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
b0defcdb | 2184 | if (!resp) |
1da177e4 LT |
2185 | return -ENOMEM; |
2186 | ||
2187 | /* Do a Get Device ID command, since it comes back with some | |
2188 | useful info. */ | |
2189 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2190 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2191 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2192 | ||
2193 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
2194 | for (;;) | |
2195 | { | |
c3e7e791 CM |
2196 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2197 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2198 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2199 | smi_result = smi_info->handlers->event( |
2200 | smi_info->si_sm, 100); | |
2201 | } | |
2202 | else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) | |
2203 | { | |
2204 | smi_result = smi_info->handlers->event( | |
2205 | smi_info->si_sm, 0); | |
2206 | } | |
2207 | else | |
2208 | break; | |
2209 | } | |
2210 | if (smi_result == SI_SM_HOSED) { | |
2211 | /* We couldn't get the state machine to run, so whatever's at | |
2212 | the port is probably not an IPMI SMI interface. */ | |
2213 | rv = -ENODEV; | |
2214 | goto out; | |
2215 | } | |
2216 | ||
2217 | /* Otherwise, we got some data. */ | |
2218 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2219 | resp, IPMI_MAX_MSG_LENGTH); | |
50c812b2 | 2220 | if (resp_len < 14) { |
1da177e4 LT |
2221 | /* That's odd, it should be longer. */ |
2222 | rv = -EINVAL; | |
2223 | goto out; | |
2224 | } | |
2225 | ||
2226 | if ((resp[1] != IPMI_GET_DEVICE_ID_CMD) || (resp[2] != 0)) { | |
2227 | /* That's odd, it shouldn't be able to fail. */ | |
2228 | rv = -EINVAL; | |
2229 | goto out; | |
2230 | } | |
2231 | ||
2232 | /* Record info from the get device id, in case we need it. */ | |
50c812b2 | 2233 | ipmi_demangle_device_id(resp+3, resp_len-3, &smi_info->device_id); |
1da177e4 LT |
2234 | |
2235 | out: | |
2236 | kfree(resp); | |
2237 | return rv; | |
2238 | } | |
2239 | ||
2240 | static int type_file_read_proc(char *page, char **start, off_t off, | |
2241 | int count, int *eof, void *data) | |
2242 | { | |
1da177e4 LT |
2243 | struct smi_info *smi = data; |
2244 | ||
b361e27b | 2245 | return sprintf(page, "%s\n", si_to_str[smi->si_type]); |
1da177e4 LT |
2246 | } |
2247 | ||
2248 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
2249 | int count, int *eof, void *data) | |
2250 | { | |
2251 | char *out = (char *) page; | |
2252 | struct smi_info *smi = data; | |
2253 | ||
2254 | out += sprintf(out, "interrupts_enabled: %d\n", | |
b0defcdb | 2255 | smi->irq && !smi->interrupt_disabled); |
1da177e4 LT |
2256 | out += sprintf(out, "short_timeouts: %ld\n", |
2257 | smi->short_timeouts); | |
2258 | out += sprintf(out, "long_timeouts: %ld\n", | |
2259 | smi->long_timeouts); | |
2260 | out += sprintf(out, "timeout_restarts: %ld\n", | |
2261 | smi->timeout_restarts); | |
2262 | out += sprintf(out, "idles: %ld\n", | |
2263 | smi->idles); | |
2264 | out += sprintf(out, "interrupts: %ld\n", | |
2265 | smi->interrupts); | |
2266 | out += sprintf(out, "attentions: %ld\n", | |
2267 | smi->attentions); | |
2268 | out += sprintf(out, "flag_fetches: %ld\n", | |
2269 | smi->flag_fetches); | |
2270 | out += sprintf(out, "hosed_count: %ld\n", | |
2271 | smi->hosed_count); | |
2272 | out += sprintf(out, "complete_transactions: %ld\n", | |
2273 | smi->complete_transactions); | |
2274 | out += sprintf(out, "events: %ld\n", | |
2275 | smi->events); | |
2276 | out += sprintf(out, "watchdog_pretimeouts: %ld\n", | |
2277 | smi->watchdog_pretimeouts); | |
2278 | out += sprintf(out, "incoming_messages: %ld\n", | |
2279 | smi->incoming_messages); | |
2280 | ||
b361e27b CM |
2281 | return out - page; |
2282 | } | |
2283 | ||
2284 | static int param_read_proc(char *page, char **start, off_t off, | |
2285 | int count, int *eof, void *data) | |
2286 | { | |
2287 | struct smi_info *smi = data; | |
2288 | ||
2289 | return sprintf(page, | |
2290 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", | |
2291 | si_to_str[smi->si_type], | |
2292 | addr_space_to_str[smi->io.addr_type], | |
2293 | smi->io.addr_data, | |
2294 | smi->io.regspacing, | |
2295 | smi->io.regsize, | |
2296 | smi->io.regshift, | |
2297 | smi->irq, | |
2298 | smi->slave_addr); | |
1da177e4 LT |
2299 | } |
2300 | ||
3ae0e0f9 CM |
2301 | /* |
2302 | * oem_data_avail_to_receive_msg_avail | |
2303 | * @info - smi_info structure with msg_flags set | |
2304 | * | |
2305 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
2306 | * Returns 1 indicating need to re-run handle_flags(). | |
2307 | */ | |
2308 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
2309 | { | |
e8b33617 CM |
2310 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
2311 | RECEIVE_MSG_AVAIL); | |
3ae0e0f9 CM |
2312 | return 1; |
2313 | } | |
2314 | ||
2315 | /* | |
2316 | * setup_dell_poweredge_oem_data_handler | |
2317 | * @info - smi_info.device_id must be populated | |
2318 | * | |
2319 | * Systems that match, but have firmware version < 1.40 may assert | |
2320 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
2321 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
2322 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
2323 | * as RECEIVE_MSG_AVAIL instead. | |
2324 | * | |
2325 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
2326 | * assert the OEM[012] bits, and if it did, the driver would have to | |
2327 | * change to handle that properly, we don't actually check for the | |
2328 | * firmware version. | |
2329 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
2330 | * Device Revision = 0x80 | |
2331 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
2332 | * Firmware Revision2 = 0x40 BCD encoded | |
2333 | * IPMI Version = 0x51 IPMI 1.5 | |
2334 | * Manufacturer ID = A2 02 00 Dell IANA | |
2335 | * | |
d5a2b89a CM |
2336 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
2337 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
2338 | * | |
3ae0e0f9 CM |
2339 | */ |
2340 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
2341 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
2342 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 2343 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
2344 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
2345 | { | |
2346 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2347 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
2348 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
2349 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 2350 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
2351 | smi_info->oem_data_avail_handler = |
2352 | oem_data_avail_to_receive_msg_avail; | |
2353 | } | |
2354 | else if (ipmi_version_major(id) < 1 || | |
2355 | (ipmi_version_major(id) == 1 && | |
2356 | ipmi_version_minor(id) < 5)) { | |
2357 | smi_info->oem_data_avail_handler = | |
2358 | oem_data_avail_to_receive_msg_avail; | |
2359 | } | |
3ae0e0f9 CM |
2360 | } |
2361 | } | |
2362 | ||
ea94027b CM |
2363 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
2364 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
2365 | { | |
2366 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
2367 | ||
2368 | /* Make it a reponse */ | |
2369 | msg->rsp[0] = msg->data[0] | 4; | |
2370 | msg->rsp[1] = msg->data[1]; | |
2371 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
2372 | msg->rsp_size = 3; | |
2373 | smi_info->curr_msg = NULL; | |
2374 | deliver_recv_msg(smi_info, msg); | |
2375 | } | |
2376 | ||
2377 | /* | |
2378 | * dell_poweredge_bt_xaction_handler | |
2379 | * @info - smi_info.device_id must be populated | |
2380 | * | |
2381 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
2382 | * not respond to a Get SDR command if the length of the data | |
2383 | * requested is exactly 0x3A, which leads to command timeouts and no | |
2384 | * data returned. This intercepts such commands, and causes userspace | |
2385 | * callers to try again with a different-sized buffer, which succeeds. | |
2386 | */ | |
2387 | ||
2388 | #define STORAGE_NETFN 0x0A | |
2389 | #define STORAGE_CMD_GET_SDR 0x23 | |
2390 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
2391 | unsigned long unused, | |
2392 | void *in) | |
2393 | { | |
2394 | struct smi_info *smi_info = in; | |
2395 | unsigned char *data = smi_info->curr_msg->data; | |
2396 | unsigned int size = smi_info->curr_msg->data_size; | |
2397 | if (size >= 8 && | |
2398 | (data[0]>>2) == STORAGE_NETFN && | |
2399 | data[1] == STORAGE_CMD_GET_SDR && | |
2400 | data[7] == 0x3A) { | |
2401 | return_hosed_msg_badsize(smi_info); | |
2402 | return NOTIFY_STOP; | |
2403 | } | |
2404 | return NOTIFY_DONE; | |
2405 | } | |
2406 | ||
2407 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
2408 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
2409 | }; | |
2410 | ||
2411 | /* | |
2412 | * setup_dell_poweredge_bt_xaction_handler | |
2413 | * @info - smi_info.device_id must be filled in already | |
2414 | * | |
2415 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
2416 | * when we know what function to use there. | |
2417 | */ | |
2418 | static void | |
2419 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
2420 | { | |
2421 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2422 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
2423 | smi_info->si_type == SI_BT) |
2424 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
2425 | } | |
2426 | ||
3ae0e0f9 CM |
2427 | /* |
2428 | * setup_oem_data_handler | |
2429 | * @info - smi_info.device_id must be filled in already | |
2430 | * | |
2431 | * Fills in smi_info.device_id.oem_data_available_handler | |
2432 | * when we know what function to use there. | |
2433 | */ | |
2434 | ||
2435 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
2436 | { | |
2437 | setup_dell_poweredge_oem_data_handler(smi_info); | |
2438 | } | |
2439 | ||
ea94027b CM |
2440 | static void setup_xaction_handlers(struct smi_info *smi_info) |
2441 | { | |
2442 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
2443 | } | |
2444 | ||
a9a2c44f CM |
2445 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
2446 | { | |
453823ba CM |
2447 | if (smi_info->intf) { |
2448 | /* The timer and thread are only running if the | |
2449 | interface has been started up and registered. */ | |
2450 | if (smi_info->thread != NULL) | |
2451 | kthread_stop(smi_info->thread); | |
2452 | del_timer_sync(&smi_info->si_timer); | |
2453 | } | |
a9a2c44f CM |
2454 | } |
2455 | ||
7420884c | 2456 | static __devinitdata struct ipmi_default_vals |
b0defcdb CM |
2457 | { |
2458 | int type; | |
2459 | int port; | |
7420884c | 2460 | } ipmi_defaults[] = |
b0defcdb CM |
2461 | { |
2462 | { .type = SI_KCS, .port = 0xca2 }, | |
2463 | { .type = SI_SMIC, .port = 0xca9 }, | |
2464 | { .type = SI_BT, .port = 0xe4 }, | |
2465 | { .port = 0 } | |
2466 | }; | |
2467 | ||
2468 | static __devinit void default_find_bmc(void) | |
2469 | { | |
2470 | struct smi_info *info; | |
2471 | int i; | |
2472 | ||
2473 | for (i = 0; ; i++) { | |
2474 | if (!ipmi_defaults[i].port) | |
2475 | break; | |
2476 | ||
2477 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2478 | if (!info) | |
2479 | return; | |
2480 | ||
2481 | info->addr_source = NULL; | |
2482 | ||
2483 | info->si_type = ipmi_defaults[i].type; | |
2484 | info->io_setup = port_setup; | |
2485 | info->io.addr_data = ipmi_defaults[i].port; | |
2486 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2487 | ||
2488 | info->io.addr = NULL; | |
2489 | info->io.regspacing = DEFAULT_REGSPACING; | |
2490 | info->io.regsize = DEFAULT_REGSPACING; | |
2491 | info->io.regshift = 0; | |
2492 | ||
2493 | if (try_smi_init(info) == 0) { | |
2494 | /* Found one... */ | |
2495 | printk(KERN_INFO "ipmi_si: Found default %s state" | |
2496 | " machine at %s address 0x%lx\n", | |
2497 | si_to_str[info->si_type], | |
2498 | addr_space_to_str[info->io.addr_type], | |
2499 | info->io.addr_data); | |
2500 | return; | |
2501 | } | |
2502 | } | |
2503 | } | |
2504 | ||
2505 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 2506 | { |
b0defcdb | 2507 | struct smi_info *e; |
1da177e4 | 2508 | |
b0defcdb CM |
2509 | list_for_each_entry(e, &smi_infos, link) { |
2510 | if (e->io.addr_type != info->io.addr_type) | |
2511 | continue; | |
2512 | if (e->io.addr_data == info->io.addr_data) | |
2513 | return 0; | |
2514 | } | |
1da177e4 | 2515 | |
b0defcdb CM |
2516 | return 1; |
2517 | } | |
1da177e4 | 2518 | |
b0defcdb CM |
2519 | static int try_smi_init(struct smi_info *new_smi) |
2520 | { | |
2521 | int rv; | |
2522 | ||
2523 | if (new_smi->addr_source) { | |
2524 | printk(KERN_INFO "ipmi_si: Trying %s-specified %s state" | |
2525 | " machine at %s address 0x%lx, slave address 0x%x," | |
2526 | " irq %d\n", | |
2527 | new_smi->addr_source, | |
2528 | si_to_str[new_smi->si_type], | |
2529 | addr_space_to_str[new_smi->io.addr_type], | |
2530 | new_smi->io.addr_data, | |
2531 | new_smi->slave_addr, new_smi->irq); | |
2532 | } | |
2533 | ||
d6dfd131 | 2534 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
2535 | if (!is_new_interface(new_smi)) { |
2536 | printk(KERN_WARNING "ipmi_si: duplicate interface\n"); | |
2537 | rv = -EBUSY; | |
2538 | goto out_err; | |
2539 | } | |
1da177e4 LT |
2540 | |
2541 | /* So we know not to free it unless we have allocated one. */ | |
2542 | new_smi->intf = NULL; | |
2543 | new_smi->si_sm = NULL; | |
2544 | new_smi->handlers = NULL; | |
2545 | ||
b0defcdb CM |
2546 | switch (new_smi->si_type) { |
2547 | case SI_KCS: | |
1da177e4 | 2548 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
2549 | break; |
2550 | ||
2551 | case SI_SMIC: | |
1da177e4 | 2552 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
2553 | break; |
2554 | ||
2555 | case SI_BT: | |
1da177e4 | 2556 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
2557 | break; |
2558 | ||
2559 | default: | |
1da177e4 LT |
2560 | /* No support for anything else yet. */ |
2561 | rv = -EIO; | |
2562 | goto out_err; | |
2563 | } | |
2564 | ||
2565 | /* Allocate the state machine's data and initialize it. */ | |
2566 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 2567 | if (!new_smi->si_sm) { |
1da177e4 LT |
2568 | printk(" Could not allocate state machine memory\n"); |
2569 | rv = -ENOMEM; | |
2570 | goto out_err; | |
2571 | } | |
2572 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
2573 | &new_smi->io); | |
2574 | ||
2575 | /* Now that we know the I/O size, we can set up the I/O. */ | |
2576 | rv = new_smi->io_setup(new_smi); | |
2577 | if (rv) { | |
2578 | printk(" Could not set up I/O space\n"); | |
2579 | goto out_err; | |
2580 | } | |
2581 | ||
2582 | spin_lock_init(&(new_smi->si_lock)); | |
2583 | spin_lock_init(&(new_smi->msg_lock)); | |
2584 | spin_lock_init(&(new_smi->count_lock)); | |
2585 | ||
2586 | /* Do low-level detection first. */ | |
2587 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb CM |
2588 | if (new_smi->addr_source) |
2589 | printk(KERN_INFO "ipmi_si: Interface detection" | |
2590 | " failed\n"); | |
1da177e4 LT |
2591 | rv = -ENODEV; |
2592 | goto out_err; | |
2593 | } | |
2594 | ||
2595 | /* Attempt a get device id command. If it fails, we probably | |
b0defcdb | 2596 | don't have a BMC here. */ |
1da177e4 | 2597 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
2598 | if (rv) { |
2599 | if (new_smi->addr_source) | |
2600 | printk(KERN_INFO "ipmi_si: There appears to be no BMC" | |
2601 | " at this location\n"); | |
1da177e4 | 2602 | goto out_err; |
b0defcdb | 2603 | } |
1da177e4 | 2604 | |
3ae0e0f9 | 2605 | setup_oem_data_handler(new_smi); |
ea94027b | 2606 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 2607 | |
1da177e4 | 2608 | /* Try to claim any interrupts. */ |
b0defcdb CM |
2609 | if (new_smi->irq_setup) |
2610 | new_smi->irq_setup(new_smi); | |
1da177e4 LT |
2611 | |
2612 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); | |
2613 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
2614 | new_smi->curr_msg = NULL; | |
2615 | atomic_set(&new_smi->req_events, 0); | |
2616 | new_smi->run_to_completion = 0; | |
2617 | ||
2618 | new_smi->interrupt_disabled = 0; | |
a9a2c44f | 2619 | atomic_set(&new_smi->stop_operation, 0); |
b0defcdb CM |
2620 | new_smi->intf_num = smi_num; |
2621 | smi_num++; | |
1da177e4 LT |
2622 | |
2623 | /* Start clearing the flags before we enable interrupts or the | |
2624 | timer to avoid racing with the timer. */ | |
2625 | start_clear_flags(new_smi); | |
2626 | /* IRQ is defined to be set when non-zero. */ | |
2627 | if (new_smi->irq) | |
2628 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
2629 | ||
50c812b2 CM |
2630 | if (!new_smi->dev) { |
2631 | /* If we don't already have a device from something | |
2632 | * else (like PCI), then register a new one. */ | |
2633 | new_smi->pdev = platform_device_alloc("ipmi_si", | |
2634 | new_smi->intf_num); | |
2635 | if (rv) { | |
2636 | printk(KERN_ERR | |
2637 | "ipmi_si_intf:" | |
2638 | " Unable to allocate platform device\n"); | |
453823ba | 2639 | goto out_err; |
50c812b2 CM |
2640 | } |
2641 | new_smi->dev = &new_smi->pdev->dev; | |
2642 | new_smi->dev->driver = &ipmi_driver; | |
2643 | ||
b48f5457 | 2644 | rv = platform_device_add(new_smi->pdev); |
50c812b2 CM |
2645 | if (rv) { |
2646 | printk(KERN_ERR | |
2647 | "ipmi_si_intf:" | |
2648 | " Unable to register system interface device:" | |
2649 | " %d\n", | |
2650 | rv); | |
453823ba | 2651 | goto out_err; |
50c812b2 CM |
2652 | } |
2653 | new_smi->dev_registered = 1; | |
2654 | } | |
2655 | ||
1da177e4 LT |
2656 | rv = ipmi_register_smi(&handlers, |
2657 | new_smi, | |
50c812b2 CM |
2658 | &new_smi->device_id, |
2659 | new_smi->dev, | |
759643b8 | 2660 | "bmc", |
453823ba | 2661 | new_smi->slave_addr); |
1da177e4 LT |
2662 | if (rv) { |
2663 | printk(KERN_ERR | |
2664 | "ipmi_si: Unable to register device: error %d\n", | |
2665 | rv); | |
2666 | goto out_err_stop_timer; | |
2667 | } | |
2668 | ||
2669 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
2670 | type_file_read_proc, NULL, | |
2671 | new_smi, THIS_MODULE); | |
2672 | if (rv) { | |
2673 | printk(KERN_ERR | |
2674 | "ipmi_si: Unable to create proc entry: %d\n", | |
2675 | rv); | |
2676 | goto out_err_stop_timer; | |
2677 | } | |
2678 | ||
2679 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
2680 | stat_file_read_proc, NULL, | |
2681 | new_smi, THIS_MODULE); | |
2682 | if (rv) { | |
2683 | printk(KERN_ERR | |
2684 | "ipmi_si: Unable to create proc entry: %d\n", | |
2685 | rv); | |
2686 | goto out_err_stop_timer; | |
2687 | } | |
2688 | ||
b361e27b CM |
2689 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
2690 | param_read_proc, NULL, | |
2691 | new_smi, THIS_MODULE); | |
2692 | if (rv) { | |
2693 | printk(KERN_ERR | |
2694 | "ipmi_si: Unable to create proc entry: %d\n", | |
2695 | rv); | |
2696 | goto out_err_stop_timer; | |
2697 | } | |
2698 | ||
b0defcdb CM |
2699 | list_add_tail(&new_smi->link, &smi_infos); |
2700 | ||
d6dfd131 | 2701 | mutex_unlock(&smi_infos_lock); |
1da177e4 | 2702 | |
b0defcdb | 2703 | printk(" IPMI %s interface initialized\n",si_to_str[new_smi->si_type]); |
1da177e4 LT |
2704 | |
2705 | return 0; | |
2706 | ||
2707 | out_err_stop_timer: | |
a9a2c44f CM |
2708 | atomic_inc(&new_smi->stop_operation); |
2709 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
2710 | |
2711 | out_err: | |
2712 | if (new_smi->intf) | |
2713 | ipmi_unregister_smi(new_smi->intf); | |
2714 | ||
b0defcdb CM |
2715 | if (new_smi->irq_cleanup) |
2716 | new_smi->irq_cleanup(new_smi); | |
1da177e4 LT |
2717 | |
2718 | /* Wait until we know that we are out of any interrupt | |
2719 | handlers might have been running before we freed the | |
2720 | interrupt. */ | |
fbd568a3 | 2721 | synchronize_sched(); |
1da177e4 LT |
2722 | |
2723 | if (new_smi->si_sm) { | |
2724 | if (new_smi->handlers) | |
2725 | new_smi->handlers->cleanup(new_smi->si_sm); | |
2726 | kfree(new_smi->si_sm); | |
2727 | } | |
b0defcdb CM |
2728 | if (new_smi->addr_source_cleanup) |
2729 | new_smi->addr_source_cleanup(new_smi); | |
7767e126 PG |
2730 | if (new_smi->io_cleanup) |
2731 | new_smi->io_cleanup(new_smi); | |
1da177e4 | 2732 | |
50c812b2 CM |
2733 | if (new_smi->dev_registered) |
2734 | platform_device_unregister(new_smi->pdev); | |
2735 | ||
2736 | kfree(new_smi); | |
2737 | ||
d6dfd131 | 2738 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 2739 | |
1da177e4 LT |
2740 | return rv; |
2741 | } | |
2742 | ||
b0defcdb | 2743 | static __devinit int init_ipmi_si(void) |
1da177e4 | 2744 | { |
1da177e4 LT |
2745 | int i; |
2746 | char *str; | |
50c812b2 | 2747 | int rv; |
1da177e4 LT |
2748 | |
2749 | if (initialized) | |
2750 | return 0; | |
2751 | initialized = 1; | |
2752 | ||
50c812b2 CM |
2753 | /* Register the device drivers. */ |
2754 | rv = driver_register(&ipmi_driver); | |
2755 | if (rv) { | |
2756 | printk(KERN_ERR | |
2757 | "init_ipmi_si: Unable to register driver: %d\n", | |
2758 | rv); | |
2759 | return rv; | |
2760 | } | |
2761 | ||
2762 | ||
1da177e4 LT |
2763 | /* Parse out the si_type string into its components. */ |
2764 | str = si_type_str; | |
2765 | if (*str != '\0') { | |
e8b33617 | 2766 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
2767 | si_type[i] = str; |
2768 | str = strchr(str, ','); | |
2769 | if (str) { | |
2770 | *str = '\0'; | |
2771 | str++; | |
2772 | } else { | |
2773 | break; | |
2774 | } | |
2775 | } | |
2776 | } | |
2777 | ||
1fdd75bd | 2778 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 2779 | |
b0defcdb CM |
2780 | hardcode_find_bmc(); |
2781 | ||
a9fad4cc | 2782 | #ifdef CONFIG_DMI |
b224cd3a | 2783 | dmi_find_bmc(); |
1da177e4 LT |
2784 | #endif |
2785 | ||
b0defcdb | 2786 | #ifdef CONFIG_ACPI |
1d5636cc | 2787 | acpi_find_bmc(); |
b0defcdb | 2788 | #endif |
1da177e4 | 2789 | |
b0defcdb | 2790 | #ifdef CONFIG_PCI |
168b35a7 CM |
2791 | rv = pci_register_driver(&ipmi_pci_driver); |
2792 | if (rv){ | |
2793 | printk(KERN_ERR | |
2794 | "init_ipmi_si: Unable to register PCI driver: %d\n", | |
2795 | rv); | |
2796 | } | |
b0defcdb CM |
2797 | #endif |
2798 | ||
2799 | if (si_trydefaults) { | |
d6dfd131 | 2800 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
2801 | if (list_empty(&smi_infos)) { |
2802 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 2803 | mutex_unlock(&smi_infos_lock); |
b0defcdb CM |
2804 | default_find_bmc(); |
2805 | } else { | |
d6dfd131 | 2806 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 2807 | } |
1da177e4 LT |
2808 | } |
2809 | ||
d6dfd131 | 2810 | mutex_lock(&smi_infos_lock); |
b361e27b | 2811 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 2812 | mutex_unlock(&smi_infos_lock); |
b0defcdb CM |
2813 | #ifdef CONFIG_PCI |
2814 | pci_unregister_driver(&ipmi_pci_driver); | |
2815 | #endif | |
55ebcc38 | 2816 | driver_unregister(&ipmi_driver); |
1da177e4 LT |
2817 | printk("ipmi_si: Unable to find any System Interface(s)\n"); |
2818 | return -ENODEV; | |
b0defcdb | 2819 | } else { |
d6dfd131 | 2820 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 2821 | return 0; |
1da177e4 | 2822 | } |
1da177e4 LT |
2823 | } |
2824 | module_init(init_ipmi_si); | |
2825 | ||
b361e27b | 2826 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 LT |
2827 | { |
2828 | int rv; | |
2829 | unsigned long flags; | |
2830 | ||
b0defcdb | 2831 | if (!to_clean) |
1da177e4 LT |
2832 | return; |
2833 | ||
b0defcdb CM |
2834 | list_del(&to_clean->link); |
2835 | ||
1da177e4 LT |
2836 | /* Tell the timer and interrupt handlers that we are shutting |
2837 | down. */ | |
2838 | spin_lock_irqsave(&(to_clean->si_lock), flags); | |
2839 | spin_lock(&(to_clean->msg_lock)); | |
2840 | ||
a9a2c44f | 2841 | atomic_inc(&to_clean->stop_operation); |
b0defcdb CM |
2842 | |
2843 | if (to_clean->irq_cleanup) | |
2844 | to_clean->irq_cleanup(to_clean); | |
1da177e4 LT |
2845 | |
2846 | spin_unlock(&(to_clean->msg_lock)); | |
2847 | spin_unlock_irqrestore(&(to_clean->si_lock), flags); | |
2848 | ||
2849 | /* Wait until we know that we are out of any interrupt | |
2850 | handlers might have been running before we freed the | |
2851 | interrupt. */ | |
fbd568a3 | 2852 | synchronize_sched(); |
1da177e4 | 2853 | |
a9a2c44f | 2854 | wait_for_timer_and_thread(to_clean); |
1da177e4 LT |
2855 | |
2856 | /* Interrupts and timeouts are stopped, now make sure the | |
2857 | interface is in a clean state. */ | |
e8b33617 | 2858 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 2859 | poll(to_clean); |
da4cd8df | 2860 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2861 | } |
2862 | ||
2863 | rv = ipmi_unregister_smi(to_clean->intf); | |
2864 | if (rv) { | |
2865 | printk(KERN_ERR | |
2866 | "ipmi_si: Unable to unregister device: errno=%d\n", | |
2867 | rv); | |
2868 | } | |
2869 | ||
2870 | to_clean->handlers->cleanup(to_clean->si_sm); | |
2871 | ||
2872 | kfree(to_clean->si_sm); | |
2873 | ||
b0defcdb CM |
2874 | if (to_clean->addr_source_cleanup) |
2875 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
2876 | if (to_clean->io_cleanup) |
2877 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
2878 | |
2879 | if (to_clean->dev_registered) | |
2880 | platform_device_unregister(to_clean->pdev); | |
2881 | ||
2882 | kfree(to_clean); | |
1da177e4 LT |
2883 | } |
2884 | ||
2885 | static __exit void cleanup_ipmi_si(void) | |
2886 | { | |
b0defcdb | 2887 | struct smi_info *e, *tmp_e; |
1da177e4 | 2888 | |
b0defcdb | 2889 | if (!initialized) |
1da177e4 LT |
2890 | return; |
2891 | ||
b0defcdb CM |
2892 | #ifdef CONFIG_PCI |
2893 | pci_unregister_driver(&ipmi_pci_driver); | |
2894 | #endif | |
2895 | ||
d6dfd131 | 2896 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
2897 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
2898 | cleanup_one_si(e); | |
d6dfd131 | 2899 | mutex_unlock(&smi_infos_lock); |
50c812b2 CM |
2900 | |
2901 | driver_unregister(&ipmi_driver); | |
1da177e4 LT |
2902 | } |
2903 | module_exit(cleanup_ipmi_si); | |
2904 | ||
2905 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
2906 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
2907 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT system interfaces."); |