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ipmi: remove unused PCI probe code
[deliverable/linux.git] / drivers / char / ipmi / ipmi_si_intf.c
CommitLineData
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.
dba9b4f6 12 * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com>
1da177e4
LT		 13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
18 *
19 *
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
26 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
29 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 */
35
36/*
37 * This file holds the "policy" for the interface to the SMI state
38 * machine. It does the configuration, handles timers and interrupts,
39 * and drives the real SMI state machine.
40 */
41
1da177e4
LT		 42#include <linux/module.h>
43#include <linux/moduleparam.h>
44#include <asm/system.h>
45#include <linux/sched.h>
46#include <linux/timer.h>
47#include <linux/errno.h>
48#include <linux/spinlock.h>
49#include <linux/slab.h>
50#include <linux/delay.h>
51#include <linux/list.h>
52#include <linux/pci.h>
53#include <linux/ioport.h>
ea94027b 54#include <linux/notifier.h>
b0defcdb 55#include <linux/mutex.h>
e9a705a0 56#include <linux/kthread.h>
1da177e4 57#include <asm/irq.h>
1da177e4
LT		 58#include <linux/interrupt.h>
59#include <linux/rcupdate.h>
60#include <linux/ipmi_smi.h>
61#include <asm/io.h>
62#include "ipmi_si_sm.h"
63#include <linux/init.h>
b224cd3a 64#include <linux/dmi.h>
b361e27b
CM		 65#include <linux/string.h>
66#include <linux/ctype.h>
67
dba9b4f6 68#ifdef CONFIG_PPC_OF
11c675ce
SR		 69#include <linux/of_device.h>
70#include <linux/of_platform.h>
dba9b4f6
CM		 71#endif
72
b361e27b 73#define PFX "ipmi_si: "
1da177e4
LT		 74
75/* Measure times between events in the driver. */
76#undef DEBUG_TIMING
77
78/* Call every 10 ms. */
79#define SI_TIMEOUT_TIME_USEC 10000
80#define SI_USEC_PER_JIFFY (1000000/HZ)
81#define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
82#define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
c305e3d3 83 short timeout */
1da177e4
LT		 84
85enum si_intf_state {
86 SI_NORMAL,
87 SI_GETTING_FLAGS,
88 SI_GETTING_EVENTS,
89 SI_CLEARING_FLAGS,
90 SI_CLEARING_FLAGS_THEN_SET_IRQ,
91 SI_GETTING_MESSAGES,
92 SI_ENABLE_INTERRUPTS1,
ee6cd5f8
CM		 93 SI_ENABLE_INTERRUPTS2,
94 SI_DISABLE_INTERRUPTS1,
95 SI_DISABLE_INTERRUPTS2
1da177e4
LT		 96 /* FIXME - add watchdog stuff. */
97};
98
9dbf68f9
CM		 99/* Some BT-specific defines we need here. */
100#define IPMI_BT_INTMASK_REG 2
101#define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
102#define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
103
1da177e4
LT		 104enum si_type {
105 SI_KCS, SI_SMIC, SI_BT
106};
b361e27b 107static char *si_to_str[] = { "kcs", "smic", "bt" };
1da177e4 108
50c812b2
CM		 109#define DEVICE_NAME "ipmi_si"
110
fe2d5ffc
DW		 111static struct platform_driver ipmi_driver = {
112 .driver = {
113 .name = DEVICE_NAME,
114 .bus = &platform_bus_type
115 }
50c812b2 116};
3ae0e0f9 117
64959e2d
CM		 118
119/*
120 * Indexes into stats[] in smi_info below.
121 */
ba8ff1c6
CM		 122enum si_stat_indexes {
123 /*
124 * Number of times the driver requested a timer while an operation
125 * was in progress.
126 */
127 SI_STAT_short_timeouts = 0,
128
129 /*
130 * Number of times the driver requested a timer while nothing was in
131 * progress.
132 */
133 SI_STAT_long_timeouts,
134
135 /* Number of times the interface was idle while being polled. */
136 SI_STAT_idles,
137
138 /* Number of interrupts the driver handled. */
139 SI_STAT_interrupts,
140
141 /* Number of time the driver got an ATTN from the hardware. */
142 SI_STAT_attentions,
64959e2d 143
ba8ff1c6
CM		 144 /* Number of times the driver requested flags from the hardware. */
145 SI_STAT_flag_fetches,
146
147 /* Number of times the hardware didn't follow the state machine. */
148 SI_STAT_hosed_count,
149
150 /* Number of completed messages. */
151 SI_STAT_complete_transactions,
152
153 /* Number of IPMI events received from the hardware. */
154 SI_STAT_events,
155
156 /* Number of watchdog pretimeouts. */
157 SI_STAT_watchdog_pretimeouts,
158
159 /* Number of asyncronous messages received. */
160 SI_STAT_incoming_messages,
161
162
163 /* This *must* remain last, add new values above this. */
164 SI_NUM_STATS
165};
64959e2d 166
c305e3d3 167struct smi_info {
a9a2c44f 168 int intf_num;
1da177e4
LT		 169 ipmi_smi_t intf;
170 struct si_sm_data *si_sm;
171 struct si_sm_handlers *handlers;
172 enum si_type si_type;
173 spinlock_t si_lock;
174 spinlock_t msg_lock;
175 struct list_head xmit_msgs;
176 struct list_head hp_xmit_msgs;
177 struct ipmi_smi_msg *curr_msg;
178 enum si_intf_state si_state;
179
c305e3d3
CM		 180 /*
181 * Used to handle the various types of I/O that can occur with
182 * IPMI
183 */
1da177e4
LT		 184 struct si_sm_io io;
185 int (*io_setup)(struct smi_info *info);
186 void (*io_cleanup)(struct smi_info *info);
187 int (*irq_setup)(struct smi_info *info);
188 void (*irq_cleanup)(struct smi_info *info);
189 unsigned int io_size;
b0defcdb
CM		 190 char *addr_source; /* ACPI, PCI, SMBIOS, hardcode, default. */
191 void (*addr_source_cleanup)(struct smi_info *info);
192 void *addr_source_data;
1da177e4 193
c305e3d3
CM		 194 /*
195 * Per-OEM handler, called from handle_flags(). Returns 1
196 * when handle_flags() needs to be re-run or 0 indicating it
197 * set si_state itself.
198 */
3ae0e0f9
CM		 199 int (*oem_data_avail_handler)(struct smi_info *smi_info);
200
c305e3d3
CM		 201 /*
202 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
203 * is set to hold the flags until we are done handling everything
204 * from the flags.
205 */
1da177e4
LT		 206#define RECEIVE_MSG_AVAIL 0x01
207#define EVENT_MSG_BUFFER_FULL 0x02
208#define WDT_PRE_TIMEOUT_INT 0x08
3ae0e0f9
CM		 209#define OEM0_DATA_AVAIL 0x20
210#define OEM1_DATA_AVAIL 0x40
211#define OEM2_DATA_AVAIL 0x80
212#define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
c305e3d3
CM		 213 OEM1_DATA_AVAIL | \
214 OEM2_DATA_AVAIL)
1da177e4
LT		 215 unsigned char msg_flags;
216
40112ae7
CM		 217 /* Does the BMC have an event buffer? */
218 char has_event_buffer;
219
c305e3d3
CM		 220 /*
221 * If set to true, this will request events the next time the
222 * state machine is idle.
223 */
1da177e4
LT		 224 atomic_t req_events;
225
c305e3d3
CM		 226 /*
227 * If true, run the state machine to completion on every send
228 * call. Generally used after a panic to make sure stuff goes
229 * out.
230 */
1da177e4
LT		 231 int run_to_completion;
232
233 /* The I/O port of an SI interface. */
234 int port;
235
c305e3d3
CM		 236 /*
237 * The space between start addresses of the two ports. For
238 * instance, if the first port is 0xca2 and the spacing is 4, then
239 * the second port is 0xca6.
240 */
1da177e4
LT		 241 unsigned int spacing;
242
243 /* zero if no irq; */
244 int irq;
245
246 /* The timer for this si. */
247 struct timer_list si_timer;
248
249 /* The time (in jiffies) the last timeout occurred at. */
250 unsigned long last_timeout_jiffies;
251
252 /* Used to gracefully stop the timer without race conditions. */
a9a2c44f 253 atomic_t stop_operation;
1da177e4 254
c305e3d3
CM		 255 /*
256 * The driver will disable interrupts when it gets into a
257 * situation where it cannot handle messages due to lack of
258 * memory. Once that situation clears up, it will re-enable
259 * interrupts.
260 */
1da177e4
LT		 261 int interrupt_disabled;
262
50c812b2 263 /* From the get device id response... */
3ae0e0f9 264 struct ipmi_device_id device_id;
1da177e4 265
50c812b2
CM		 266 /* Driver model stuff. */
267 struct device *dev;
268 struct platform_device *pdev;
269
c305e3d3
CM		 270 /*
271 * True if we allocated the device, false if it came from
272 * someplace else (like PCI).
273 */
50c812b2
CM		 274 int dev_registered;
275
1da177e4
LT		 276 /* Slave address, could be reported from DMI. */
277 unsigned char slave_addr;
278
279 /* Counters and things for the proc filesystem. */
64959e2d 280 atomic_t stats[SI_NUM_STATS];
a9a2c44f 281
c305e3d3 282 struct task_struct *thread;
b0defcdb
CM		 283
284 struct list_head link;
1da177e4
LT		 285};
286
64959e2d
CM		 287#define smi_inc_stat(smi, stat) \
288 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
289#define smi_get_stat(smi, stat) \
290 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
291
a51f4a81
CM		 292#define SI_MAX_PARMS 4
293
294static int force_kipmid[SI_MAX_PARMS];
295static int num_force_kipmid;
296
b361e27b
CM		 297static int unload_when_empty = 1;
298
b0defcdb 299static int try_smi_init(struct smi_info *smi);
b361e27b 300static void cleanup_one_si(struct smi_info *to_clean);
b0defcdb 301
e041c683 302static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
c305e3d3 303static int register_xaction_notifier(struct notifier_block *nb)
ea94027b 304{
e041c683 305 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
ea94027b
CM		 306}
307
1da177e4
LT		 308static void deliver_recv_msg(struct smi_info *smi_info,
309 struct ipmi_smi_msg *msg)
310{
311 /* Deliver the message to the upper layer with the lock
c305e3d3 312 released. */
1da177e4
LT		 313 spin_unlock(&(smi_info->si_lock));
314 ipmi_smi_msg_received(smi_info->intf, msg);
315 spin_lock(&(smi_info->si_lock));
316}
317
4d7cbac7 318static void return_hosed_msg(struct smi_info *smi_info, int cCode)
1da177e4
LT		 319{
320 struct ipmi_smi_msg *msg = smi_info->curr_msg;
321
4d7cbac7
CM		 322 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
323 cCode = IPMI_ERR_UNSPECIFIED;
324 /* else use it as is */
325
1da177e4
LT		 326 /* Make it a reponse */
327 msg->rsp[0] = msg->data[0] | 4;
328 msg->rsp[1] = msg->data[1];
4d7cbac7 329 msg->rsp[2] = cCode;
1da177e4
LT		 330 msg->rsp_size = 3;
331
332 smi_info->curr_msg = NULL;
333 deliver_recv_msg(smi_info, msg);
334}
335
336static enum si_sm_result start_next_msg(struct smi_info *smi_info)
337{
338 int rv;
339 struct list_head *entry = NULL;
340#ifdef DEBUG_TIMING
341 struct timeval t;
342#endif
343
c305e3d3
CM		 344 /*
345 * No need to save flags, we aleady have interrupts off and we
346 * already hold the SMI lock.
347 */
5956dce1
KB		 348 if (!smi_info->run_to_completion)
349 spin_lock(&(smi_info->msg_lock));
1da177e4
LT		 350
351 /* Pick the high priority queue first. */
b0defcdb 352 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
1da177e4 353 entry = smi_info->hp_xmit_msgs.next;
b0defcdb 354 } else if (!list_empty(&(smi_info->xmit_msgs))) {
1da177e4
LT		 355 entry = smi_info->xmit_msgs.next;
356 }
357
b0defcdb 358 if (!entry) {
1da177e4
LT		 359 smi_info->curr_msg = NULL;
360 rv = SI_SM_IDLE;
361 } else {
362 int err;
363
364 list_del(entry);
365 smi_info->curr_msg = list_entry(entry,
366 struct ipmi_smi_msg,
367 link);
368#ifdef DEBUG_TIMING
369 do_gettimeofday(&t);
c305e3d3 370 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4 371#endif
e041c683
AS		 372 err = atomic_notifier_call_chain(&xaction_notifier_list,
373 0, smi_info);
ea94027b
CM		 374 if (err & NOTIFY_STOP_MASK) {
375 rv = SI_SM_CALL_WITHOUT_DELAY;
376 goto out;
377 }
1da177e4
LT		 378 err = smi_info->handlers->start_transaction(
379 smi_info->si_sm,
380 smi_info->curr_msg->data,
381 smi_info->curr_msg->data_size);
c305e3d3 382 if (err)
4d7cbac7 383 return_hosed_msg(smi_info, err);
1da177e4
LT		 384
385 rv = SI_SM_CALL_WITHOUT_DELAY;
386 }
c305e3d3 387 out:
5956dce1
KB		 388 if (!smi_info->run_to_completion)
389 spin_unlock(&(smi_info->msg_lock));
1da177e4
LT		 390
391 return rv;
392}
393
394static void start_enable_irq(struct smi_info *smi_info)
395{
396 unsigned char msg[2];
397
c305e3d3
CM		 398 /*
399 * If we are enabling interrupts, we have to tell the
400 * BMC to use them.
401 */
1da177e4
LT		 402 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
403 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
404
405 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
406 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
407}
408
ee6cd5f8
CM		 409static void start_disable_irq(struct smi_info *smi_info)
410{
411 unsigned char msg[2];
412
413 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
414 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
415
416 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
417 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
418}
419
1da177e4
LT		 420static void start_clear_flags(struct smi_info *smi_info)
421{
422 unsigned char msg[3];
423
424 /* Make sure the watchdog pre-timeout flag is not set at startup. */
425 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
426 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
427 msg[2] = WDT_PRE_TIMEOUT_INT;
428
429 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
430 smi_info->si_state = SI_CLEARING_FLAGS;
431}
432
c305e3d3
CM		 433/*
434 * When we have a situtaion where we run out of memory and cannot
435 * allocate messages, we just leave them in the BMC and run the system
436 * polled until we can allocate some memory. Once we have some
437 * memory, we will re-enable the interrupt.
438 */
1da177e4
LT		 439static inline void disable_si_irq(struct smi_info *smi_info)
440{
b0defcdb 441 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
ee6cd5f8 442 start_disable_irq(smi_info);
1da177e4
LT		 443 smi_info->interrupt_disabled = 1;
444 }
445}
446
447static inline void enable_si_irq(struct smi_info *smi_info)
448{
449 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
ee6cd5f8 450 start_enable_irq(smi_info);
1da177e4
LT		 451 smi_info->interrupt_disabled = 0;
452 }
453}
454
455static void handle_flags(struct smi_info *smi_info)
456{
3ae0e0f9 457 retry:
1da177e4
LT		 458 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
459 /* Watchdog pre-timeout */
64959e2d 460 smi_inc_stat(smi_info, watchdog_pretimeouts);
1da177e4
LT		 461
462 start_clear_flags(smi_info);
463 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
464 spin_unlock(&(smi_info->si_lock));
465 ipmi_smi_watchdog_pretimeout(smi_info->intf);
466 spin_lock(&(smi_info->si_lock));
467 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
468 /* Messages available. */
469 smi_info->curr_msg = ipmi_alloc_smi_msg();
b0defcdb 470 if (!smi_info->curr_msg) {
1da177e4
LT		 471 disable_si_irq(smi_info);
472 smi_info->si_state = SI_NORMAL;
473 return;
474 }
475 enable_si_irq(smi_info);
476
477 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
478 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
479 smi_info->curr_msg->data_size = 2;
480
481 smi_info->handlers->start_transaction(
482 smi_info->si_sm,
483 smi_info->curr_msg->data,
484 smi_info->curr_msg->data_size);
485 smi_info->si_state = SI_GETTING_MESSAGES;
486 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
487 /* Events available. */
488 smi_info->curr_msg = ipmi_alloc_smi_msg();
b0defcdb 489 if (!smi_info->curr_msg) {
1da177e4
LT		 490 disable_si_irq(smi_info);
491 smi_info->si_state = SI_NORMAL;
492 return;
493 }
494 enable_si_irq(smi_info);
495
496 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
497 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
498 smi_info->curr_msg->data_size = 2;
499
500 smi_info->handlers->start_transaction(
501 smi_info->si_sm,
502 smi_info->curr_msg->data,
503 smi_info->curr_msg->data_size);
504 smi_info->si_state = SI_GETTING_EVENTS;
4064d5ef 505 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
c305e3d3 506 smi_info->oem_data_avail_handler) {
4064d5ef
CM		 507 if (smi_info->oem_data_avail_handler(smi_info))
508 goto retry;
c305e3d3 509 } else
1da177e4 510 smi_info->si_state = SI_NORMAL;
1da177e4
LT		 511}
512
513static void handle_transaction_done(struct smi_info *smi_info)
514{
515 struct ipmi_smi_msg *msg;
516#ifdef DEBUG_TIMING
517 struct timeval t;
518
519 do_gettimeofday(&t);
c305e3d3 520 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 521#endif
522 switch (smi_info->si_state) {
523 case SI_NORMAL:
b0defcdb 524 if (!smi_info->curr_msg)
1da177e4
LT		 525 break;
526
527 smi_info->curr_msg->rsp_size
528 = smi_info->handlers->get_result(
529 smi_info->si_sm,
530 smi_info->curr_msg->rsp,
531 IPMI_MAX_MSG_LENGTH);
532
c305e3d3
CM		 533 /*
534 * Do this here becase deliver_recv_msg() releases the
535 * lock, and a new message can be put in during the
536 * time the lock is released.
537 */
1da177e4
LT		 538 msg = smi_info->curr_msg;
539 smi_info->curr_msg = NULL;
540 deliver_recv_msg(smi_info, msg);
541 break;
542
543 case SI_GETTING_FLAGS:
544 {
545 unsigned char msg[4];
546 unsigned int len;
547
548 /* We got the flags from the SMI, now handle them. */
549 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
550 if (msg[2] != 0) {
c305e3d3 551 /* Error fetching flags, just give up for now. */
1da177e4
LT		 552 smi_info->si_state = SI_NORMAL;
553 } else if (len < 4) {
c305e3d3
CM		 554 /*
555 * Hmm, no flags. That's technically illegal, but
556 * don't use uninitialized data.
557 */
1da177e4
LT		 558 smi_info->si_state = SI_NORMAL;
559 } else {
560 smi_info->msg_flags = msg[3];
561 handle_flags(smi_info);
562 }
563 break;
564 }
565
566 case SI_CLEARING_FLAGS:
567 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
568 {
569 unsigned char msg[3];
570
571 /* We cleared the flags. */
572 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
573 if (msg[2] != 0) {
574 /* Error clearing flags */
575 printk(KERN_WARNING
576 "ipmi_si: Error clearing flags: %2.2x\n",
577 msg[2]);
578 }
579 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
580 start_enable_irq(smi_info);
581 else
582 smi_info->si_state = SI_NORMAL;
583 break;
584 }
585
586 case SI_GETTING_EVENTS:
587 {
588 smi_info->curr_msg->rsp_size
589 = smi_info->handlers->get_result(
590 smi_info->si_sm,
591 smi_info->curr_msg->rsp,
592 IPMI_MAX_MSG_LENGTH);
593
c305e3d3
CM		 594 /*
595 * Do this here becase deliver_recv_msg() releases the
596 * lock, and a new message can be put in during the
597 * time the lock is released.
598 */
1da177e4
LT		 599 msg = smi_info->curr_msg;
600 smi_info->curr_msg = NULL;
601 if (msg->rsp[2] != 0) {
602 /* Error getting event, probably done. */
603 msg->done(msg);
604
605 /* Take off the event flag. */
606 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
607 handle_flags(smi_info);
608 } else {
64959e2d 609 smi_inc_stat(smi_info, events);
1da177e4 610
c305e3d3
CM		 611 /*
612 * Do this before we deliver the message
613 * because delivering the message releases the
614 * lock and something else can mess with the
615 * state.
616 */
1da177e4
LT		 617 handle_flags(smi_info);
618
619 deliver_recv_msg(smi_info, msg);
620 }
621 break;
622 }
623
624 case SI_GETTING_MESSAGES:
625 {
626 smi_info->curr_msg->rsp_size
627 = smi_info->handlers->get_result(
628 smi_info->si_sm,
629 smi_info->curr_msg->rsp,
630 IPMI_MAX_MSG_LENGTH);
631
c305e3d3
CM		 632 /*
633 * Do this here becase deliver_recv_msg() releases the
634 * lock, and a new message can be put in during the
635 * time the lock is released.
636 */
1da177e4
LT		 637 msg = smi_info->curr_msg;
638 smi_info->curr_msg = NULL;
639 if (msg->rsp[2] != 0) {
640 /* Error getting event, probably done. */
641 msg->done(msg);
642
643 /* Take off the msg flag. */
644 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
645 handle_flags(smi_info);
646 } else {
64959e2d 647 smi_inc_stat(smi_info, incoming_messages);
1da177e4 648
c305e3d3
CM		 649 /*
650 * Do this before we deliver the message
651 * because delivering the message releases the
652 * lock and something else can mess with the
653 * state.
654 */
1da177e4
LT		 655 handle_flags(smi_info);
656
657 deliver_recv_msg(smi_info, msg);
658 }
659 break;
660 }
661
662 case SI_ENABLE_INTERRUPTS1:
663 {
664 unsigned char msg[4];
665
666 /* We got the flags from the SMI, now handle them. */
667 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
668 if (msg[2] != 0) {
669 printk(KERN_WARNING
670 "ipmi_si: Could not enable interrupts"
671 ", failed get, using polled mode.\n");
672 smi_info->si_state = SI_NORMAL;
673 } else {
674 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
675 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
ee6cd5f8
CM		 676 msg[2] = (msg[3] |
677 IPMI_BMC_RCV_MSG_INTR |
678 IPMI_BMC_EVT_MSG_INTR);
1da177e4
LT		 679 smi_info->handlers->start_transaction(
680 smi_info->si_sm, msg, 3);
681 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
682 }
683 break;
684 }
685
686 case SI_ENABLE_INTERRUPTS2:
687 {
688 unsigned char msg[4];
689
690 /* We got the flags from the SMI, now handle them. */
691 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
692 if (msg[2] != 0) {
693 printk(KERN_WARNING
694 "ipmi_si: Could not enable interrupts"
695 ", failed set, using polled mode.\n");
696 }
697 smi_info->si_state = SI_NORMAL;
698 break;
699 }
ee6cd5f8
CM		 700
701 case SI_DISABLE_INTERRUPTS1:
702 {
703 unsigned char msg[4];
704
705 /* We got the flags from the SMI, now handle them. */
706 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
707 if (msg[2] != 0) {
708 printk(KERN_WARNING
709 "ipmi_si: Could not disable interrupts"
710 ", failed get.\n");
711 smi_info->si_state = SI_NORMAL;
712 } else {
713 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
714 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
715 msg[2] = (msg[3] &
716 ~(IPMI_BMC_RCV_MSG_INTR |
717 IPMI_BMC_EVT_MSG_INTR));
718 smi_info->handlers->start_transaction(
719 smi_info->si_sm, msg, 3);
720 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
721 }
722 break;
723 }
724
725 case SI_DISABLE_INTERRUPTS2:
726 {
727 unsigned char msg[4];
728
729 /* We got the flags from the SMI, now handle them. */
730 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
731 if (msg[2] != 0) {
732 printk(KERN_WARNING
733 "ipmi_si: Could not disable interrupts"
734 ", failed set.\n");
735 }
736 smi_info->si_state = SI_NORMAL;
737 break;
738 }
1da177e4
LT		 739 }
740}
741
c305e3d3
CM		 742/*
743 * Called on timeouts and events. Timeouts should pass the elapsed
744 * time, interrupts should pass in zero. Must be called with
745 * si_lock held and interrupts disabled.
746 */
1da177e4
LT		 747static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
748 int time)
749{
750 enum si_sm_result si_sm_result;
751
752 restart:
c305e3d3
CM		 753 /*
754 * There used to be a loop here that waited a little while
755 * (around 25us) before giving up. That turned out to be
756 * pointless, the minimum delays I was seeing were in the 300us
757 * range, which is far too long to wait in an interrupt. So
758 * we just run until the state machine tells us something
759 * happened or it needs a delay.
760 */
1da177e4
LT		 761 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
762 time = 0;
763 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
1da177e4 764 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
1da177e4 765
c305e3d3 766 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
64959e2d 767 smi_inc_stat(smi_info, complete_transactions);
1da177e4
LT		 768
769 handle_transaction_done(smi_info);
770 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
c305e3d3 771 } else if (si_sm_result == SI_SM_HOSED) {
64959e2d 772 smi_inc_stat(smi_info, hosed_count);
1da177e4 773
c305e3d3
CM		 774 /*
775 * Do the before return_hosed_msg, because that
776 * releases the lock.
777 */
1da177e4
LT		 778 smi_info->si_state = SI_NORMAL;
779 if (smi_info->curr_msg != NULL) {
c305e3d3
CM		 780 /*
781 * If we were handling a user message, format
782 * a response to send to the upper layer to
783 * tell it about the error.
784 */
4d7cbac7 785 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
1da177e4
LT		 786 }
787 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
788 }
789
4ea18425
CM		 790 /*
791 * We prefer handling attn over new messages. But don't do
792 * this if there is not yet an upper layer to handle anything.
793 */
c305e3d3 794 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
1da177e4
LT		 795 unsigned char msg[2];
796
64959e2d 797 smi_inc_stat(smi_info, attentions);
1da177e4 798
c305e3d3
CM		 799 /*
800 * Got a attn, send down a get message flags to see
801 * what's causing it. It would be better to handle
802 * this in the upper layer, but due to the way
803 * interrupts work with the SMI, that's not really
804 * possible.
805 */
1da177e4
LT		 806 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
807 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
808
809 smi_info->handlers->start_transaction(
810 smi_info->si_sm, msg, 2);
811 smi_info->si_state = SI_GETTING_FLAGS;
812 goto restart;
813 }
814
815 /* If we are currently idle, try to start the next message. */
816 if (si_sm_result == SI_SM_IDLE) {
64959e2d 817 smi_inc_stat(smi_info, idles);
1da177e4
LT		 818
819 si_sm_result = start_next_msg(smi_info);
820 if (si_sm_result != SI_SM_IDLE)
821 goto restart;
c305e3d3 822 }
1da177e4
LT		 823
824 if ((si_sm_result == SI_SM_IDLE)
c305e3d3
CM		 825 && (atomic_read(&smi_info->req_events))) {
826 /*
827 * We are idle and the upper layer requested that I fetch
828 * events, so do so.
829 */
55162fb1 830 atomic_set(&smi_info->req_events, 0);
1da177e4 831
55162fb1
CM		 832 smi_info->curr_msg = ipmi_alloc_smi_msg();
833 if (!smi_info->curr_msg)
834 goto out;
1da177e4 835
55162fb1
CM		 836 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
837 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
838 smi_info->curr_msg->data_size = 2;
1da177e4
LT		 839
840 smi_info->handlers->start_transaction(
55162fb1
CM		 841 smi_info->si_sm,
842 smi_info->curr_msg->data,
843 smi_info->curr_msg->data_size);
844 smi_info->si_state = SI_GETTING_EVENTS;
1da177e4
LT		 845 goto restart;
846 }
55162fb1 847 out:
1da177e4
LT		 848 return si_sm_result;
849}
850
851static void sender(void *send_info,
852 struct ipmi_smi_msg *msg,
853 int priority)
854{
855 struct smi_info *smi_info = send_info;
856 enum si_sm_result result;
857 unsigned long flags;
858#ifdef DEBUG_TIMING
859 struct timeval t;
860#endif
861
b361e27b
CM		 862 if (atomic_read(&smi_info->stop_operation)) {
863 msg->rsp[0] = msg->data[0] | 4;
864 msg->rsp[1] = msg->data[1];
865 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
866 msg->rsp_size = 3;
867 deliver_recv_msg(smi_info, msg);
868 return;
869 }
870
1da177e4
LT		 871#ifdef DEBUG_TIMING
872 do_gettimeofday(&t);
873 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
874#endif
875
876 if (smi_info->run_to_completion) {
bda4c30a
CM		 877 /*
878 * If we are running to completion, then throw it in
879 * the list and run transactions until everything is
880 * clear. Priority doesn't matter here.
881 */
882
883 /*
884 * Run to completion means we are single-threaded, no
885 * need for locks.
886 */
1da177e4
LT		 887 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
888
1da177e4
LT		 889 result = smi_event_handler(smi_info, 0);
890 while (result != SI_SM_IDLE) {
891 udelay(SI_SHORT_TIMEOUT_USEC);
892 result = smi_event_handler(smi_info,
893 SI_SHORT_TIMEOUT_USEC);
894 }
1da177e4 895 return;
1da177e4 896 }
1da177e4 897
bda4c30a
CM		 898 spin_lock_irqsave(&smi_info->msg_lock, flags);
899 if (priority > 0)
900 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
901 else
902 list_add_tail(&msg->link, &smi_info->xmit_msgs);
903 spin_unlock_irqrestore(&smi_info->msg_lock, flags);
904
905 spin_lock_irqsave(&smi_info->si_lock, flags);
c305e3d3 906 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL)
1da177e4 907 start_next_msg(smi_info);
bda4c30a 908 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1da177e4
LT		 909}
910
911static void set_run_to_completion(void *send_info, int i_run_to_completion)
912{
913 struct smi_info *smi_info = send_info;
914 enum si_sm_result result;
1da177e4
LT		 915
916 smi_info->run_to_completion = i_run_to_completion;
917 if (i_run_to_completion) {
918 result = smi_event_handler(smi_info, 0);
919 while (result != SI_SM_IDLE) {
920 udelay(SI_SHORT_TIMEOUT_USEC);
921 result = smi_event_handler(smi_info,
922 SI_SHORT_TIMEOUT_USEC);
923 }
924 }
1da177e4
LT		 925}
926
a9a2c44f
CM		 927static int ipmi_thread(void *data)
928{
929 struct smi_info *smi_info = data;
e9a705a0 930 unsigned long flags;
a9a2c44f
CM		 931 enum si_sm_result smi_result;
932
a9a2c44f 933 set_user_nice(current, 19);
e9a705a0 934 while (!kthread_should_stop()) {
a9a2c44f 935 spin_lock_irqsave(&(smi_info->si_lock), flags);
8a3628d5 936 smi_result = smi_event_handler(smi_info, 0);
a9a2c44f 937 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
c305e3d3
CM		 938 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
939 ; /* do nothing */
e9a705a0 940 else if (smi_result == SI_SM_CALL_WITH_DELAY)
33979734 941 schedule();
e9a705a0
MD		 942 else
943 schedule_timeout_interruptible(1);
a9a2c44f 944 }
a9a2c44f
CM		 945 return 0;
946}
947
948
1da177e4
LT		 949static void poll(void *send_info)
950{
951 struct smi_info *smi_info = send_info;
fcfa4724 952 unsigned long flags;
1da177e4 953
15c62e10
CM		 954 /*
955 * Make sure there is some delay in the poll loop so we can
956 * drive time forward and timeout things.
957 */
958 udelay(10);
fcfa4724 959 spin_lock_irqsave(&smi_info->si_lock, flags);
15c62e10 960 smi_event_handler(smi_info, 10);
fcfa4724 961 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1da177e4
LT		 962}
963
964static void request_events(void *send_info)
965{
966 struct smi_info *smi_info = send_info;
967
40112ae7
CM		 968 if (atomic_read(&smi_info->stop_operation) ||
969 !smi_info->has_event_buffer)
b361e27b
CM		 970 return;
971
1da177e4
LT		 972 atomic_set(&smi_info->req_events, 1);
973}
974
0c8204b3 975static int initialized;
1da177e4 976
1da177e4
LT		 977static void smi_timeout(unsigned long data)
978{
979 struct smi_info *smi_info = (struct smi_info *) data;
980 enum si_sm_result smi_result;
981 unsigned long flags;
982 unsigned long jiffies_now;
c4edff1c 983 long time_diff;
1da177e4
LT		 984#ifdef DEBUG_TIMING
985 struct timeval t;
986#endif
987
1da177e4
LT		 988 spin_lock_irqsave(&(smi_info->si_lock), flags);
989#ifdef DEBUG_TIMING
990 do_gettimeofday(&t);
c305e3d3 991 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 992#endif
993 jiffies_now = jiffies;
c4edff1c 994 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1da177e4
LT		 995 * SI_USEC_PER_JIFFY);
996 smi_result = smi_event_handler(smi_info, time_diff);
997
998 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
999
1000 smi_info->last_timeout_jiffies = jiffies_now;
1001
b0defcdb 1002 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1da177e4
LT		 1003 /* Running with interrupts, only do long timeouts. */
1004 smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
64959e2d 1005 smi_inc_stat(smi_info, long_timeouts);
1da177e4
LT		 1006 goto do_add_timer;
1007 }
1008
c305e3d3
CM		 1009 /*
1010 * If the state machine asks for a short delay, then shorten
1011 * the timer timeout.
1012 */
1da177e4 1013 if (smi_result == SI_SM_CALL_WITH_DELAY) {
64959e2d 1014 smi_inc_stat(smi_info, short_timeouts);
1da177e4 1015 smi_info->si_timer.expires = jiffies + 1;
1da177e4 1016 } else {
64959e2d 1017 smi_inc_stat(smi_info, long_timeouts);
1da177e4 1018 smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
1da177e4
LT		 1019 }
1020
1021 do_add_timer:
1022 add_timer(&(smi_info->si_timer));
1023}
1024
7d12e780 1025static irqreturn_t si_irq_handler(int irq, void *data)
1da177e4
LT		 1026{
1027 struct smi_info *smi_info = data;
1028 unsigned long flags;
1029#ifdef DEBUG_TIMING
1030 struct timeval t;
1031#endif
1032
1033 spin_lock_irqsave(&(smi_info->si_lock), flags);
1034
64959e2d 1035 smi_inc_stat(smi_info, interrupts);
1da177e4 1036
1da177e4
LT		 1037#ifdef DEBUG_TIMING
1038 do_gettimeofday(&t);
c305e3d3 1039 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 1040#endif
1041 smi_event_handler(smi_info, 0);
1da177e4
LT		 1042 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1043 return IRQ_HANDLED;
1044}
1045
7d12e780 1046static irqreturn_t si_bt_irq_handler(int irq, void *data)
9dbf68f9
CM		 1047{
1048 struct smi_info *smi_info = data;
1049 /* We need to clear the IRQ flag for the BT interface. */
1050 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1051 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1052 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
7d12e780 1053 return si_irq_handler(irq, data);
9dbf68f9
CM		 1054}
1055
453823ba
CM		 1056static int smi_start_processing(void *send_info,
1057 ipmi_smi_t intf)
1058{
1059 struct smi_info *new_smi = send_info;
a51f4a81 1060 int enable = 0;
453823ba
CM		 1061
1062 new_smi->intf = intf;
1063
c45adc39
CM		 1064 /* Try to claim any interrupts. */
1065 if (new_smi->irq_setup)
1066 new_smi->irq_setup(new_smi);
1067
453823ba
CM		 1068 /* Set up the timer that drives the interface. */
1069 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1070 new_smi->last_timeout_jiffies = jiffies;
1071 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
1072
a51f4a81
CM		 1073 /*
1074 * Check if the user forcefully enabled the daemon.
1075 */
1076 if (new_smi->intf_num < num_force_kipmid)
1077 enable = force_kipmid[new_smi->intf_num];
df3fe8de
CM		 1078 /*
1079 * The BT interface is efficient enough to not need a thread,
1080 * and there is no need for a thread if we have interrupts.
1081 */
c305e3d3 1082 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
a51f4a81
CM		 1083 enable = 1;
1084
1085 if (enable) {
453823ba
CM		 1086 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1087 "kipmi%d", new_smi->intf_num);
1088 if (IS_ERR(new_smi->thread)) {
1089 printk(KERN_NOTICE "ipmi_si_intf: Could not start"
1090 " kernel thread due to error %ld, only using"
1091 " timers to drive the interface\n",
1092 PTR_ERR(new_smi->thread));
1093 new_smi->thread = NULL;
1094 }
1095 }
1096
1097 return 0;
1098}
9dbf68f9 1099
b9675136
CM		 1100static void set_maintenance_mode(void *send_info, int enable)
1101{
1102 struct smi_info *smi_info = send_info;
1103
1104 if (!enable)
1105 atomic_set(&smi_info->req_events, 0);
1106}
1107
c305e3d3 1108static struct ipmi_smi_handlers handlers = {
1da177e4 1109 .owner = THIS_MODULE,
453823ba 1110 .start_processing = smi_start_processing,
1da177e4
LT		 1111 .sender = sender,
1112 .request_events = request_events,
b9675136 1113 .set_maintenance_mode = set_maintenance_mode,
1da177e4
LT		 1114 .set_run_to_completion = set_run_to_completion,
1115 .poll = poll,
1116};
1117
c305e3d3
CM		 1118/*
1119 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1120 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1121 */
1da177e4 1122
b0defcdb 1123static LIST_HEAD(smi_infos);
d6dfd131 1124static DEFINE_MUTEX(smi_infos_lock);
b0defcdb 1125static int smi_num; /* Used to sequence the SMIs */
1da177e4 1126
1da177e4 1127#define DEFAULT_REGSPACING 1
dba9b4f6 1128#define DEFAULT_REGSIZE 1
1da177e4
LT		 1129
1130static int si_trydefaults = 1;
1131static char *si_type[SI_MAX_PARMS];
1132#define MAX_SI_TYPE_STR 30
1133static char si_type_str[MAX_SI_TYPE_STR];
1134static unsigned long addrs[SI_MAX_PARMS];
64a6f950 1135static unsigned int num_addrs;
1da177e4 1136static unsigned int ports[SI_MAX_PARMS];
64a6f950 1137static unsigned int num_ports;
1da177e4 1138static int irqs[SI_MAX_PARMS];
64a6f950 1139static unsigned int num_irqs;
1da177e4 1140static int regspacings[SI_MAX_PARMS];
64a6f950 1141static unsigned int num_regspacings;
1da177e4 1142static int regsizes[SI_MAX_PARMS];
64a6f950 1143static unsigned int num_regsizes;
1da177e4 1144static int regshifts[SI_MAX_PARMS];
64a6f950 1145static unsigned int num_regshifts;
1da177e4 1146static int slave_addrs[SI_MAX_PARMS];
64a6f950 1147static unsigned int num_slave_addrs;
1da177e4 1148
b361e27b
CM		 1149#define IPMI_IO_ADDR_SPACE 0
1150#define IPMI_MEM_ADDR_SPACE 1
1d5636cc 1151static char *addr_space_to_str[] = { "i/o", "mem" };
b361e27b
CM		 1152
1153static int hotmod_handler(const char *val, struct kernel_param *kp);
1154
1155module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1156MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1157 " Documentation/IPMI.txt in the kernel sources for the"
1158 " gory details.");
1da177e4
LT		 1159
1160module_param_named(trydefaults, si_trydefaults, bool, 0);
1161MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1162 " default scan of the KCS and SMIC interface at the standard"
1163 " address");
1164module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1165MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1166 " interface separated by commas. The types are 'kcs',"
1167 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1168 " the first interface to kcs and the second to bt");
64a6f950 1169module_param_array(addrs, ulong, &num_addrs, 0);
1da177e4
LT		 1170MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1171 " addresses separated by commas. Only use if an interface"
1172 " is in memory. Otherwise, set it to zero or leave"
1173 " it blank.");
64a6f950 1174module_param_array(ports, uint, &num_ports, 0);
1da177e4
LT		 1175MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1176 " addresses separated by commas. Only use if an interface"
1177 " is a port. Otherwise, set it to zero or leave"
1178 " it blank.");
1179module_param_array(irqs, int, &num_irqs, 0);
1180MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1181 " addresses separated by commas. Only use if an interface"
1182 " has an interrupt. Otherwise, set it to zero or leave"
1183 " it blank.");
1184module_param_array(regspacings, int, &num_regspacings, 0);
1185MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1186 " and each successive register used by the interface. For"
1187 " instance, if the start address is 0xca2 and the spacing"
1188 " is 2, then the second address is at 0xca4. Defaults"
1189 " to 1.");
1190module_param_array(regsizes, int, &num_regsizes, 0);
1191MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1192 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1193 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1194 " the 8-bit IPMI register has to be read from a larger"
1195 " register.");
1196module_param_array(regshifts, int, &num_regshifts, 0);
1197MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1198 " IPMI register, in bits. For instance, if the data"
1199 " is read from a 32-bit word and the IPMI data is in"
1200 " bit 8-15, then the shift would be 8");
1201module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1202MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1203 " the controller. Normally this is 0x20, but can be"
1204 " overridden by this parm. This is an array indexed"
1205 " by interface number.");
a51f4a81
CM		 1206module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1207MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1208 " disabled(0). Normally the IPMI driver auto-detects"
1209 " this, but the value may be overridden by this parm.");
b361e27b
CM		 1210module_param(unload_when_empty, int, 0);
1211MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1212 " specified or found, default is 1. Setting to 0"
1213 " is useful for hot add of devices using hotmod.");
1da177e4
LT		 1214
1215
b0defcdb 1216static void std_irq_cleanup(struct smi_info *info)
1da177e4 1217{
b0defcdb
CM		 1218 if (info->si_type == SI_BT)
1219 /* Disable the interrupt in the BT interface. */
1220 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1221 free_irq(info->irq, info);
1da177e4 1222}
1da177e4
LT		 1223
1224static int std_irq_setup(struct smi_info *info)
1225{
1226 int rv;
1227
b0defcdb 1228 if (!info->irq)
1da177e4
LT		 1229 return 0;
1230
9dbf68f9
CM		 1231 if (info->si_type == SI_BT) {
1232 rv = request_irq(info->irq,
1233 si_bt_irq_handler,
ee6cd5f8 1234 IRQF_SHARED | IRQF_DISABLED,
9dbf68f9
CM		 1235 DEVICE_NAME,
1236 info);
b0defcdb 1237 if (!rv)
9dbf68f9
CM		 1238 /* Enable the interrupt in the BT interface. */
1239 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1240 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1241 } else
1242 rv = request_irq(info->irq,
1243 si_irq_handler,
ee6cd5f8 1244 IRQF_SHARED | IRQF_DISABLED,
9dbf68f9
CM		 1245 DEVICE_NAME,
1246 info);
1da177e4
LT		 1247 if (rv) {
1248 printk(KERN_WARNING
1249 "ipmi_si: %s unable to claim interrupt %d,"
1250 " running polled\n",
1251 DEVICE_NAME, info->irq);
1252 info->irq = 0;
1253 } else {
b0defcdb 1254 info->irq_cleanup = std_irq_cleanup;
1da177e4
LT		 1255 printk(" Using irq %d\n", info->irq);
1256 }
1257
1258 return rv;
1259}
1260
1da177e4
LT		 1261static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1262{
b0defcdb 1263 unsigned int addr = io->addr_data;
1da177e4 1264
b0defcdb 1265 return inb(addr + (offset * io->regspacing));
1da177e4
LT		 1266}
1267
1268static void port_outb(struct si_sm_io *io, unsigned int offset,
1269 unsigned char b)
1270{
b0defcdb 1271 unsigned int addr = io->addr_data;
1da177e4 1272
b0defcdb 1273 outb(b, addr + (offset * io->regspacing));
1da177e4
LT		 1274}
1275
1276static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1277{
b0defcdb 1278 unsigned int addr = io->addr_data;
1da177e4 1279
b0defcdb 1280 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1da177e4
LT		 1281}
1282
1283static void port_outw(struct si_sm_io *io, unsigned int offset,
1284 unsigned char b)
1285{
b0defcdb 1286 unsigned int addr = io->addr_data;
1da177e4 1287
b0defcdb 1288 outw(b << io->regshift, addr + (offset * io->regspacing));
1da177e4
LT		 1289}
1290
1291static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1292{
b0defcdb 1293 unsigned int addr = io->addr_data;
1da177e4 1294
b0defcdb 1295 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1da177e4
LT		 1296}
1297
1298static void port_outl(struct si_sm_io *io, unsigned int offset,
1299 unsigned char b)
1300{
b0defcdb 1301 unsigned int addr = io->addr_data;
1da177e4 1302
b0defcdb 1303 outl(b << io->regshift, addr+(offset * io->regspacing));
1da177e4
LT		 1304}
1305
1306static void port_cleanup(struct smi_info *info)
1307{
b0defcdb 1308 unsigned int addr = info->io.addr_data;
d61a3ead 1309 int idx;
1da177e4 1310
b0defcdb 1311 if (addr) {
c305e3d3 1312 for (idx = 0; idx < info->io_size; idx++)
d61a3ead
CM		 1313 release_region(addr + idx * info->io.regspacing,
1314 info->io.regsize);
1da177e4 1315 }
1da177e4
LT		 1316}
1317
1318static int port_setup(struct smi_info *info)
1319{
b0defcdb 1320 unsigned int addr = info->io.addr_data;
d61a3ead 1321 int idx;
1da177e4 1322
b0defcdb 1323 if (!addr)
1da177e4
LT		 1324 return -ENODEV;
1325
1326 info->io_cleanup = port_cleanup;
1327
c305e3d3
CM		 1328 /*
1329 * Figure out the actual inb/inw/inl/etc routine to use based
1330 * upon the register size.
1331 */
1da177e4
LT		 1332 switch (info->io.regsize) {
1333 case 1:
1334 info->io.inputb = port_inb;
1335 info->io.outputb = port_outb;
1336 break;
1337 case 2:
1338 info->io.inputb = port_inw;
1339 info->io.outputb = port_outw;
1340 break;
1341 case 4:
1342 info->io.inputb = port_inl;
1343 info->io.outputb = port_outl;
1344 break;
1345 default:
c305e3d3 1346 printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n",
1da177e4
LT		 1347 info->io.regsize);
1348 return -EINVAL;
1349 }
1350
c305e3d3
CM		 1351 /*
1352 * Some BIOSes reserve disjoint I/O regions in their ACPI
d61a3ead
CM		 1353 * tables. This causes problems when trying to register the
1354 * entire I/O region. Therefore we must register each I/O
1355 * port separately.
1356 */
c305e3d3 1357 for (idx = 0; idx < info->io_size; idx++) {
d61a3ead
CM		 1358 if (request_region(addr + idx * info->io.regspacing,
1359 info->io.regsize, DEVICE_NAME) == NULL) {
1360 /* Undo allocations */
1361 while (idx--) {
1362 release_region(addr + idx * info->io.regspacing,
1363 info->io.regsize);
1364 }
1365 return -EIO;
1366 }
1367 }
1da177e4
LT		 1368 return 0;
1369}
1370
546cfdf4 1371static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1372{
1373 return readb((io->addr)+(offset * io->regspacing));
1374}
1375
546cfdf4 1376static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1377 unsigned char b)
1378{
1379 writeb(b, (io->addr)+(offset * io->regspacing));
1380}
1381
546cfdf4 1382static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1383{
1384 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1385 & 0xff;
1da177e4
LT		 1386}
1387
546cfdf4 1388static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1389 unsigned char b)
1390{
1391 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1392}
1393
546cfdf4 1394static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1395{
1396 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1397 & 0xff;
1da177e4
LT		 1398}
1399
546cfdf4 1400static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1401 unsigned char b)
1402{
1403 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1404}
1405
1406#ifdef readq
1407static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1408{
1409 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1410 & 0xff;
1da177e4
LT		 1411}
1412
1413static void mem_outq(struct si_sm_io *io, unsigned int offset,
1414 unsigned char b)
1415{
1416 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1417}
1418#endif
1419
1420static void mem_cleanup(struct smi_info *info)
1421{
b0defcdb 1422 unsigned long addr = info->io.addr_data;
1da177e4
LT		 1423 int mapsize;
1424
1425 if (info->io.addr) {
1426 iounmap(info->io.addr);
1427
1428 mapsize = ((info->io_size * info->io.regspacing)
1429 - (info->io.regspacing - info->io.regsize));
1430
b0defcdb 1431 release_mem_region(addr, mapsize);
1da177e4 1432 }
1da177e4
LT		 1433}
1434
1435static int mem_setup(struct smi_info *info)
1436{
b0defcdb 1437 unsigned long addr = info->io.addr_data;
1da177e4
LT		 1438 int mapsize;
1439
b0defcdb 1440 if (!addr)
1da177e4
LT		 1441 return -ENODEV;
1442
1443 info->io_cleanup = mem_cleanup;
1444
c305e3d3
CM		 1445 /*
1446 * Figure out the actual readb/readw/readl/etc routine to use based
1447 * upon the register size.
1448 */
1da177e4
LT		 1449 switch (info->io.regsize) {
1450 case 1:
546cfdf4
AD		 1451 info->io.inputb = intf_mem_inb;
1452 info->io.outputb = intf_mem_outb;
1da177e4
LT		 1453 break;
1454 case 2:
546cfdf4
AD		 1455 info->io.inputb = intf_mem_inw;
1456 info->io.outputb = intf_mem_outw;
1da177e4
LT		 1457 break;
1458 case 4:
546cfdf4
AD		 1459 info->io.inputb = intf_mem_inl;
1460 info->io.outputb = intf_mem_outl;
1da177e4
LT		 1461 break;
1462#ifdef readq
1463 case 8:
1464 info->io.inputb = mem_inq;
1465 info->io.outputb = mem_outq;
1466 break;
1467#endif
1468 default:
c305e3d3 1469 printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n",
1da177e4
LT		 1470 info->io.regsize);
1471 return -EINVAL;
1472 }
1473
c305e3d3
CM		 1474 /*
1475 * Calculate the total amount of memory to claim. This is an
1da177e4
LT		 1476 * unusual looking calculation, but it avoids claiming any
1477 * more memory than it has to. It will claim everything
1478 * between the first address to the end of the last full
c305e3d3
CM		 1479 * register.
1480 */
1da177e4
LT		 1481 mapsize = ((info->io_size * info->io.regspacing)
1482 - (info->io.regspacing - info->io.regsize));
1483
b0defcdb 1484 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1da177e4
LT		 1485 return -EIO;
1486
b0defcdb 1487 info->io.addr = ioremap(addr, mapsize);
1da177e4 1488 if (info->io.addr == NULL) {
b0defcdb 1489 release_mem_region(addr, mapsize);
1da177e4
LT		 1490 return -EIO;
1491 }
1492 return 0;
1493}
1494
b361e27b
CM		 1495/*
1496 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1497 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1498 * Options are:
1499 * rsp=<regspacing>
1500 * rsi=<regsize>
1501 * rsh=<regshift>
1502 * irq=<irq>
1503 * ipmb=<ipmb addr>
1504 */
1505enum hotmod_op { HM_ADD, HM_REMOVE };
1506struct hotmod_vals {
1507 char *name;
1508 int val;
1509};
1510static struct hotmod_vals hotmod_ops[] = {
1511 { "add", HM_ADD },
1512 { "remove", HM_REMOVE },
1513 { NULL }
1514};
1515static struct hotmod_vals hotmod_si[] = {
1516 { "kcs", SI_KCS },
1517 { "smic", SI_SMIC },
1518 { "bt", SI_BT },
1519 { NULL }
1520};
1521static struct hotmod_vals hotmod_as[] = {
1522 { "mem", IPMI_MEM_ADDR_SPACE },
1523 { "i/o", IPMI_IO_ADDR_SPACE },
1524 { NULL }
1525};
1d5636cc 1526
b361e27b
CM		 1527static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1528{
1529 char *s;
1530 int i;
1531
1532 s = strchr(*curr, ',');
1533 if (!s) {
1534 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1535 return -EINVAL;
1536 }
1537 *s = '\0';
1538 s++;
1539 for (i = 0; hotmod_ops[i].name; i++) {
1d5636cc 1540 if (strcmp(*curr, v[i].name) == 0) {
b361e27b
CM		 1541 *val = v[i].val;
1542 *curr = s;
1543 return 0;
1544 }
1545 }
1546
1547 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1548 return -EINVAL;
1549}
1550
1d5636cc
CM		 1551static int check_hotmod_int_op(const char *curr, const char *option,
1552 const char *name, int *val)
1553{
1554 char *n;
1555
1556 if (strcmp(curr, name) == 0) {
1557 if (!option) {
1558 printk(KERN_WARNING PFX
1559 "No option given for '%s'\n",
1560 curr);
1561 return -EINVAL;
1562 }
1563 *val = simple_strtoul(option, &n, 0);
1564 if ((*n != '\0') || (*option == '\0')) {
1565 printk(KERN_WARNING PFX
1566 "Bad option given for '%s'\n",
1567 curr);
1568 return -EINVAL;
1569 }
1570 return 1;
1571 }
1572 return 0;
1573}
1574
b361e27b
CM		 1575static int hotmod_handler(const char *val, struct kernel_param *kp)
1576{
1577 char *str = kstrdup(val, GFP_KERNEL);
1d5636cc 1578 int rv;
b361e27b
CM		 1579 char *next, *curr, *s, *n, *o;
1580 enum hotmod_op op;
1581 enum si_type si_type;
1582 int addr_space;
1583 unsigned long addr;
1584 int regspacing;
1585 int regsize;
1586 int regshift;
1587 int irq;
1588 int ipmb;
1589 int ival;
1d5636cc 1590 int len;
b361e27b
CM		 1591 struct smi_info *info;
1592
1593 if (!str)
1594 return -ENOMEM;
1595
1596 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1d5636cc
CM		 1597 len = strlen(str);
1598 ival = len - 1;
b361e27b
CM		 1599 while ((ival >= 0) && isspace(str[ival])) {
1600 str[ival] = '\0';
1601 ival--;
1602 }
1603
1604 for (curr = str; curr; curr = next) {
1605 regspacing = 1;
1606 regsize = 1;
1607 regshift = 0;
1608 irq = 0;
1609 ipmb = 0x20;
1610
1611 next = strchr(curr, ':');
1612 if (next) {
1613 *next = '\0';
1614 next++;
1615 }
1616
1617 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1618 if (rv)
1619 break;
1620 op = ival;
1621
1622 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1623 if (rv)
1624 break;
1625 si_type = ival;
1626
1627 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1628 if (rv)
1629 break;
1630
1631 s = strchr(curr, ',');
1632 if (s) {
1633 *s = '\0';
1634 s++;
1635 }
1636 addr = simple_strtoul(curr, &n, 0);
1637 if ((*n != '\0') || (*curr == '\0')) {
1638 printk(KERN_WARNING PFX "Invalid hotmod address"
1639 " '%s'\n", curr);
1640 break;
1641 }
1642
1643 while (s) {
1644 curr = s;
1645 s = strchr(curr, ',');
1646 if (s) {
1647 *s = '\0';
1648 s++;
1649 }
1650 o = strchr(curr, '=');
1651 if (o) {
1652 *o = '\0';
1653 o++;
1654 }
1d5636cc
CM		 1655 rv = check_hotmod_int_op(curr, o, "rsp", &regspacing);
1656 if (rv < 0)
b361e27b 1657 goto out;
1d5636cc
CM		 1658 else if (rv)
1659 continue;
1660 rv = check_hotmod_int_op(curr, o, "rsi", &regsize);
1661 if (rv < 0)
1662 goto out;
1663 else if (rv)
1664 continue;
1665 rv = check_hotmod_int_op(curr, o, "rsh", &regshift);
1666 if (rv < 0)
1667 goto out;
1668 else if (rv)
1669 continue;
1670 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1671 if (rv < 0)
1672 goto out;
1673 else if (rv)
1674 continue;
1675 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1676 if (rv < 0)
1677 goto out;
1678 else if (rv)
1679 continue;
1680
1681 rv = -EINVAL;
1682 printk(KERN_WARNING PFX
1683 "Invalid hotmod option '%s'\n",
1684 curr);
1685 goto out;
b361e27b
CM		 1686 }
1687
1688 if (op == HM_ADD) {
1689 info = kzalloc(sizeof(*info), GFP_KERNEL);
1690 if (!info) {
1691 rv = -ENOMEM;
1692 goto out;
1693 }
1694
1695 info->addr_source = "hotmod";
1696 info->si_type = si_type;
1697 info->io.addr_data = addr;
1698 info->io.addr_type = addr_space;
1699 if (addr_space == IPMI_MEM_ADDR_SPACE)
1700 info->io_setup = mem_setup;
1701 else
1702 info->io_setup = port_setup;
1703
1704 info->io.addr = NULL;
1705 info->io.regspacing = regspacing;
1706 if (!info->io.regspacing)
1707 info->io.regspacing = DEFAULT_REGSPACING;
1708 info->io.regsize = regsize;
1709 if (!info->io.regsize)
1710 info->io.regsize = DEFAULT_REGSPACING;
1711 info->io.regshift = regshift;
1712 info->irq = irq;
1713 if (info->irq)
1714 info->irq_setup = std_irq_setup;
1715 info->slave_addr = ipmb;
1716
1717 try_smi_init(info);
1718 } else {
1719 /* remove */
1720 struct smi_info *e, *tmp_e;
1721
1722 mutex_lock(&smi_infos_lock);
1723 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1724 if (e->io.addr_type != addr_space)
1725 continue;
1726 if (e->si_type != si_type)
1727 continue;
1728 if (e->io.addr_data == addr)
1729 cleanup_one_si(e);
1730 }
1731 mutex_unlock(&smi_infos_lock);
1732 }
1733 }
1d5636cc 1734 rv = len;
b361e27b
CM		 1735 out:
1736 kfree(str);
1737 return rv;
1738}
b0defcdb
CM		 1739
1740static __devinit void hardcode_find_bmc(void)
1da177e4 1741{
b0defcdb 1742 int i;
1da177e4
LT		 1743 struct smi_info *info;
1744
b0defcdb
CM		 1745 for (i = 0; i < SI_MAX_PARMS; i++) {
1746 if (!ports[i] && !addrs[i])
1747 continue;
1da177e4 1748
b0defcdb
CM		 1749 info = kzalloc(sizeof(*info), GFP_KERNEL);
1750 if (!info)
1751 return;
1da177e4 1752
b0defcdb 1753 info->addr_source = "hardcoded";
1da177e4 1754
1d5636cc 1755 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
b0defcdb 1756 info->si_type = SI_KCS;
1d5636cc 1757 } else if (strcmp(si_type[i], "smic") == 0) {
b0defcdb 1758 info->si_type = SI_SMIC;
1d5636cc 1759 } else if (strcmp(si_type[i], "bt") == 0) {
b0defcdb
CM		 1760 info->si_type = SI_BT;
1761 } else {
1762 printk(KERN_WARNING
1763 "ipmi_si: Interface type specified "
1764 "for interface %d, was invalid: %s\n",
1765 i, si_type[i]);
1766 kfree(info);
1767 continue;
1768 }
1da177e4 1769
b0defcdb
CM		 1770 if (ports[i]) {
1771 /* An I/O port */
1772 info->io_setup = port_setup;
1773 info->io.addr_data = ports[i];
1774 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1775 } else if (addrs[i]) {
1776 /* A memory port */
1777 info->io_setup = mem_setup;
1778 info->io.addr_data = addrs[i];
1779 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1780 } else {
1781 printk(KERN_WARNING
1782 "ipmi_si: Interface type specified "
1783 "for interface %d, "
1784 "but port and address were not set or "
1785 "set to zero.\n", i);
1786 kfree(info);
1787 continue;
1788 }
1da177e4 1789
b0defcdb
CM		 1790 info->io.addr = NULL;
1791 info->io.regspacing = regspacings[i];
1792 if (!info->io.regspacing)
1793 info->io.regspacing = DEFAULT_REGSPACING;
1794 info->io.regsize = regsizes[i];
1795 if (!info->io.regsize)
1796 info->io.regsize = DEFAULT_REGSPACING;
1797 info->io.regshift = regshifts[i];
1798 info->irq = irqs[i];
1799 if (info->irq)
1800 info->irq_setup = std_irq_setup;
1da177e4 1801
b0defcdb
CM		 1802 try_smi_init(info);
1803 }
1804}
1da177e4 1805
8466361a 1806#ifdef CONFIG_ACPI
1da177e4
LT		 1807
1808#include <linux/acpi.h>
1809
c305e3d3
CM		 1810/*
1811 * Once we get an ACPI failure, we don't try any more, because we go
1812 * through the tables sequentially. Once we don't find a table, there
1813 * are no more.
1814 */
0c8204b3 1815static int acpi_failure;
1da177e4
LT		 1816
1817/* For GPE-type interrupts. */
1818static u32 ipmi_acpi_gpe(void *context)
1819{
1820 struct smi_info *smi_info = context;
1821 unsigned long flags;
1822#ifdef DEBUG_TIMING
1823 struct timeval t;
1824#endif
1825
1826 spin_lock_irqsave(&(smi_info->si_lock), flags);
1827
64959e2d 1828 smi_inc_stat(smi_info, interrupts);
1da177e4 1829
1da177e4
LT		 1830#ifdef DEBUG_TIMING
1831 do_gettimeofday(&t);
1832 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1833#endif
1834 smi_event_handler(smi_info, 0);
1da177e4
LT		 1835 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1836
1837 return ACPI_INTERRUPT_HANDLED;
1838}
1839
b0defcdb
CM		 1840static void acpi_gpe_irq_cleanup(struct smi_info *info)
1841{
1842 if (!info->irq)
1843 return;
1844
1845 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1846}
1847
1da177e4
LT		 1848static int acpi_gpe_irq_setup(struct smi_info *info)
1849{
1850 acpi_status status;
1851
b0defcdb 1852 if (!info->irq)
1da177e4
LT		 1853 return 0;
1854
1855 /* FIXME - is level triggered right? */
1856 status = acpi_install_gpe_handler(NULL,
1857 info->irq,
1858 ACPI_GPE_LEVEL_TRIGGERED,
1859 &ipmi_acpi_gpe,
1860 info);
1861 if (status != AE_OK) {
1862 printk(KERN_WARNING
1863 "ipmi_si: %s unable to claim ACPI GPE %d,"
1864 " running polled\n",
1865 DEVICE_NAME, info->irq);
1866 info->irq = 0;
1867 return -EINVAL;
1868 } else {
b0defcdb 1869 info->irq_cleanup = acpi_gpe_irq_cleanup;
1da177e4
LT		 1870 printk(" Using ACPI GPE %d\n", info->irq);
1871 return 0;
1872 }
1873}
1874
1da177e4
LT		 1875/*
1876 * Defined at
c305e3d3
CM		 1877 * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/
1878 * Docs/TechPapers/IA64/hpspmi.pdf
1da177e4
LT		 1879 */
1880struct SPMITable {
1881 s8 Signature[4];
1882 u32 Length;
1883 u8 Revision;
1884 u8 Checksum;
1885 s8 OEMID[6];
1886 s8 OEMTableID[8];
1887 s8 OEMRevision[4];
1888 s8 CreatorID[4];
1889 s8 CreatorRevision[4];
1890 u8 InterfaceType;
1891 u8 IPMIlegacy;
1892 s16 SpecificationRevision;
1893
1894 /*
1895 * Bit 0 - SCI interrupt supported
1896 * Bit 1 - I/O APIC/SAPIC
1897 */
1898 u8 InterruptType;
1899
c305e3d3
CM		 1900 /*
1901 * If bit 0 of InterruptType is set, then this is the SCI
1902 * interrupt in the GPEx_STS register.
1903 */
1da177e4
LT		 1904 u8 GPE;
1905
1906 s16 Reserved;
1907
c305e3d3
CM		 1908 /*
1909 * If bit 1 of InterruptType is set, then this is the I/O
1910 * APIC/SAPIC interrupt.
1911 */
1da177e4
LT		 1912 u32 GlobalSystemInterrupt;
1913
1914 /* The actual register address. */
1915 struct acpi_generic_address addr;
1916
1917 u8 UID[4];
1918
1919 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
1920};
1921
b0defcdb 1922static __devinit int try_init_acpi(struct SPMITable *spmi)
1da177e4
LT		 1923{
1924 struct smi_info *info;
1da177e4
LT		 1925 u8 addr_space;
1926
1da177e4
LT		 1927 if (spmi->IPMIlegacy != 1) {
1928 printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy);
c305e3d3 1929 return -ENODEV;
1da177e4
LT		 1930 }
1931
15a58ed1 1932 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
1da177e4
LT		 1933 addr_space = IPMI_MEM_ADDR_SPACE;
1934 else
1935 addr_space = IPMI_IO_ADDR_SPACE;
b0defcdb
CM		 1936
1937 info = kzalloc(sizeof(*info), GFP_KERNEL);
1938 if (!info) {
1939 printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n");
1940 return -ENOMEM;
1941 }
1942
1943 info->addr_source = "ACPI";
1da177e4 1944
1da177e4 1945 /* Figure out the interface type. */
c305e3d3 1946 switch (spmi->InterfaceType) {
1da177e4 1947 case 1: /* KCS */
b0defcdb 1948 info->si_type = SI_KCS;
1da177e4 1949 break;
1da177e4 1950 case 2: /* SMIC */
b0defcdb 1951 info->si_type = SI_SMIC;
1da177e4 1952 break;
1da177e4 1953 case 3: /* BT */
b0defcdb 1954 info->si_type = SI_BT;
1da177e4 1955 break;
1da177e4
LT		 1956 default:
1957 printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n",
1958 spmi->InterfaceType);
b0defcdb 1959 kfree(info);
1da177e4
LT		 1960 return -EIO;
1961 }
1962
1da177e4
LT		 1963 if (spmi->InterruptType & 1) {
1964 /* We've got a GPE interrupt. */
1965 info->irq = spmi->GPE;
1966 info->irq_setup = acpi_gpe_irq_setup;
1da177e4
LT		 1967 } else if (spmi->InterruptType & 2) {
1968 /* We've got an APIC/SAPIC interrupt. */
1969 info->irq = spmi->GlobalSystemInterrupt;
1970 info->irq_setup = std_irq_setup;
1da177e4
LT		 1971 } else {
1972 /* Use the default interrupt setting. */
1973 info->irq = 0;
1974 info->irq_setup = NULL;
1975 }
1976
15a58ed1 1977 if (spmi->addr.bit_width) {
35bc37a0 1978 /* A (hopefully) properly formed register bit width. */
15a58ed1 1979 info->io.regspacing = spmi->addr.bit_width / 8;
35bc37a0 1980 } else {
35bc37a0
CM		 1981 info->io.regspacing = DEFAULT_REGSPACING;
1982 }
b0defcdb 1983 info->io.regsize = info->io.regspacing;
15a58ed1 1984 info->io.regshift = spmi->addr.bit_offset;
1da177e4 1985
15a58ed1 1986 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
1da177e4 1987 info->io_setup = mem_setup;
8fe1425a 1988 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
15a58ed1 1989 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
1da177e4 1990 info->io_setup = port_setup;
8fe1425a 1991 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1da177e4
LT		 1992 } else {
1993 kfree(info);
c305e3d3
CM		 1994 printk(KERN_WARNING
1995 "ipmi_si: Unknown ACPI I/O Address type\n");
1da177e4
LT		 1996 return -EIO;
1997 }
b0defcdb 1998 info->io.addr_data = spmi->addr.address;
1da177e4 1999
b0defcdb 2000 try_smi_init(info);
1da177e4 2001
1da177e4
LT		 2002 return 0;
2003}
b0defcdb
CM		 2004
2005static __devinit void acpi_find_bmc(void)
2006{
2007 acpi_status status;
2008 struct SPMITable *spmi;
2009 int i;
2010
2011 if (acpi_disabled)
2012 return;
2013
2014 if (acpi_failure)
2015 return;
2016
2017 for (i = 0; ; i++) {
15a58ed1
AS		 2018 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2019 (struct acpi_table_header **)&spmi);
b0defcdb
CM		 2020 if (status != AE_OK)
2021 return;
2022
2023 try_init_acpi(spmi);
2024 }
2025}
1da177e4
LT		 2026#endif
2027
a9fad4cc 2028#ifdef CONFIG_DMI
c305e3d3 2029struct dmi_ipmi_data {
1da177e4
LT		 2030 u8 type;
2031 u8 addr_space;
2032 unsigned long base_addr;
2033 u8 irq;
2034 u8 offset;
2035 u8 slave_addr;
b0defcdb 2036};
1da177e4 2037
1855256c 2038static int __devinit decode_dmi(const struct dmi_header *dm,
b0defcdb 2039 struct dmi_ipmi_data *dmi)
1da177e4 2040{
1855256c 2041 const u8 *data = (const u8 *)dm;
1da177e4
LT		 2042 unsigned long base_addr;
2043 u8 reg_spacing;
b224cd3a 2044 u8 len = dm->length;
1da177e4 2045
b0defcdb 2046 dmi->type = data[4];
1da177e4
LT		 2047
2048 memcpy(&base_addr, data+8, sizeof(unsigned long));
2049 if (len >= 0x11) {
2050 if (base_addr & 1) {
2051 /* I/O */
2052 base_addr &= 0xFFFE;
b0defcdb 2053 dmi->addr_space = IPMI_IO_ADDR_SPACE;
c305e3d3 2054 } else
1da177e4 2055 /* Memory */
b0defcdb 2056 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
c305e3d3 2057
1da177e4
LT		 2058 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2059 is odd. */
b0defcdb 2060 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
1da177e4 2061
b0defcdb 2062 dmi->irq = data[0x11];
1da177e4
LT		 2063
2064 /* The top two bits of byte 0x10 hold the register spacing. */
b224cd3a 2065 reg_spacing = (data[0x10] & 0xC0) >> 6;
c305e3d3 2066 switch (reg_spacing) {
1da177e4 2067 case 0x00: /* Byte boundaries */
b0defcdb 2068 dmi->offset = 1;
1da177e4
LT		 2069 break;
2070 case 0x01: /* 32-bit boundaries */
b0defcdb 2071 dmi->offset = 4;
1da177e4
LT		 2072 break;
2073 case 0x02: /* 16-byte boundaries */
b0defcdb 2074 dmi->offset = 16;
1da177e4
LT		 2075 break;
2076 default:
2077 /* Some other interface, just ignore it. */
2078 return -EIO;
2079 }
2080 } else {
2081 /* Old DMI spec. */
c305e3d3
CM		 2082 /*
2083 * Note that technically, the lower bit of the base
92068801
CM		 2084 * address should be 1 if the address is I/O and 0 if
2085 * the address is in memory. So many systems get that
2086 * wrong (and all that I have seen are I/O) so we just
2087 * ignore that bit and assume I/O. Systems that use
c305e3d3
CM		 2088 * memory should use the newer spec, anyway.
2089 */
b0defcdb
CM		 2090 dmi->base_addr = base_addr & 0xfffe;
2091 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2092 dmi->offset = 1;
1da177e4
LT		 2093 }
2094
b0defcdb 2095 dmi->slave_addr = data[6];
1da177e4 2096
b0defcdb 2097 return 0;
1da177e4
LT		 2098}
2099
b0defcdb 2100static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
1da177e4 2101{
b0defcdb 2102 struct smi_info *info;
1da177e4 2103
b0defcdb
CM		 2104 info = kzalloc(sizeof(*info), GFP_KERNEL);
2105 if (!info) {
2106 printk(KERN_ERR
2107 "ipmi_si: Could not allocate SI data\n");
2108 return;
1da177e4 2109 }
1da177e4 2110
b0defcdb 2111 info->addr_source = "SMBIOS";
1da177e4 2112
e8b33617 2113 switch (ipmi_data->type) {
b0defcdb
CM		 2114 case 0x01: /* KCS */
2115 info->si_type = SI_KCS;
2116 break;
2117 case 0x02: /* SMIC */
2118 info->si_type = SI_SMIC;
2119 break;
2120 case 0x03: /* BT */
2121 info->si_type = SI_BT;
2122 break;
2123 default:
80cd6920 2124 kfree(info);
b0defcdb 2125 return;
1da177e4 2126 }
1da177e4 2127
b0defcdb
CM		 2128 switch (ipmi_data->addr_space) {
2129 case IPMI_MEM_ADDR_SPACE:
1da177e4 2130 info->io_setup = mem_setup;
b0defcdb
CM		 2131 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2132 break;
2133
2134 case IPMI_IO_ADDR_SPACE:
1da177e4 2135 info->io_setup = port_setup;
b0defcdb
CM		 2136 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2137 break;
2138
2139 default:
1da177e4 2140 kfree(info);
b0defcdb
CM		 2141 printk(KERN_WARNING
2142 "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n",
2143 ipmi_data->addr_space);
2144 return;
1da177e4 2145 }
b0defcdb 2146 info->io.addr_data = ipmi_data->base_addr;
1da177e4 2147
b0defcdb
CM		 2148 info->io.regspacing = ipmi_data->offset;
2149 if (!info->io.regspacing)
1da177e4
LT		 2150 info->io.regspacing = DEFAULT_REGSPACING;
2151 info->io.regsize = DEFAULT_REGSPACING;
b0defcdb 2152 info->io.regshift = 0;
1da177e4
LT		 2153
2154 info->slave_addr = ipmi_data->slave_addr;
2155
b0defcdb
CM		 2156 info->irq = ipmi_data->irq;
2157 if (info->irq)
2158 info->irq_setup = std_irq_setup;
1da177e4 2159
b0defcdb
CM		 2160 try_smi_init(info);
2161}
1da177e4 2162
b0defcdb
CM		 2163static void __devinit dmi_find_bmc(void)
2164{
1855256c 2165 const struct dmi_device *dev = NULL;
b0defcdb
CM		 2166 struct dmi_ipmi_data data;
2167 int rv;
2168
2169 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
397f4ebf 2170 memset(&data, 0, sizeof(data));
1855256c
JG		 2171 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2172 &data);
b0defcdb
CM		 2173 if (!rv)
2174 try_init_dmi(&data);
2175 }
1da177e4 2176}
a9fad4cc 2177#endif /* CONFIG_DMI */
1da177e4
LT		 2178
2179#ifdef CONFIG_PCI
2180
b0defcdb
CM		 2181#define PCI_ERMC_CLASSCODE 0x0C0700
2182#define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2183#define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2184#define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2185#define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2186#define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2187
1da177e4
LT		 2188#define PCI_HP_VENDOR_ID 0x103C
2189#define PCI_MMC_DEVICE_ID 0x121A
2190#define PCI_MMC_ADDR_CW 0x10
2191
b0defcdb
CM		 2192static void ipmi_pci_cleanup(struct smi_info *info)
2193{
2194 struct pci_dev *pdev = info->addr_source_data;
2195
2196 pci_disable_device(pdev);
2197}
1da177e4 2198
b0defcdb
CM		 2199static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
2200 const struct pci_device_id *ent)
1da177e4 2201{
b0defcdb
CM		 2202 int rv;
2203 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2204 struct smi_info *info;
1da177e4 2205
b0defcdb
CM		 2206 info = kzalloc(sizeof(*info), GFP_KERNEL);
2207 if (!info)
1cd441f9 2208 return -ENOMEM;
1da177e4 2209
b0defcdb 2210 info->addr_source = "PCI";
1da177e4 2211
b0defcdb
CM		 2212 switch (class_type) {
2213 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2214 info->si_type = SI_SMIC;
2215 break;
1da177e4 2216
b0defcdb
CM		 2217 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2218 info->si_type = SI_KCS;
2219 break;
2220
2221 case PCI_ERMC_CLASSCODE_TYPE_BT:
2222 info->si_type = SI_BT;
2223 break;
2224
2225 default:
2226 kfree(info);
2227 printk(KERN_INFO "ipmi_si: %s: Unknown IPMI type: %d\n",
2228 pci_name(pdev), class_type);
1cd441f9 2229 return -ENOMEM;
1da177e4
LT		 2230 }
2231
b0defcdb
CM		 2232 rv = pci_enable_device(pdev);
2233 if (rv) {
2234 printk(KERN_ERR "ipmi_si: %s: couldn't enable PCI device\n",
2235 pci_name(pdev));
2236 kfree(info);
2237 return rv;
1da177e4
LT		 2238 }
2239
b0defcdb
CM		 2240 info->addr_source_cleanup = ipmi_pci_cleanup;
2241 info->addr_source_data = pdev;
1da177e4 2242
b0defcdb
CM		 2243 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2244 info->io_setup = port_setup;
2245 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2246 } else {
2247 info->io_setup = mem_setup;
2248 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1da177e4 2249 }
b0defcdb 2250 info->io.addr_data = pci_resource_start(pdev, 0);
1da177e4 2251
b0defcdb 2252 info->io.regspacing = DEFAULT_REGSPACING;
1da177e4 2253 info->io.regsize = DEFAULT_REGSPACING;
b0defcdb 2254 info->io.regshift = 0;
1da177e4 2255
b0defcdb
CM		 2256 info->irq = pdev->irq;
2257 if (info->irq)
2258 info->irq_setup = std_irq_setup;
1da177e4 2259
50c812b2 2260 info->dev = &pdev->dev;
fca3b747 2261 pci_set_drvdata(pdev, info);
50c812b2 2262
b0defcdb
CM		 2263 return try_smi_init(info);
2264}
1da177e4 2265
b0defcdb
CM		 2266static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
2267{
fca3b747
CM		 2268 struct smi_info *info = pci_get_drvdata(pdev);
2269 cleanup_one_si(info);
b0defcdb 2270}
1da177e4 2271
b0defcdb
CM		 2272#ifdef CONFIG_PM
2273static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2274{
1da177e4
LT		 2275 return 0;
2276}
1da177e4 2277
b0defcdb 2278static int ipmi_pci_resume(struct pci_dev *pdev)
1da177e4 2279{
b0defcdb
CM		 2280 return 0;
2281}
1da177e4 2282#endif
1da177e4 2283
b0defcdb
CM		 2284static struct pci_device_id ipmi_pci_devices[] = {
2285 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
248bdd5e
KC		 2286 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2287 { 0, }
b0defcdb
CM		 2288};
2289MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2290
2291static struct pci_driver ipmi_pci_driver = {
c305e3d3
CM		 2292 .name = DEVICE_NAME,
2293 .id_table = ipmi_pci_devices,
2294 .probe = ipmi_pci_probe,
2295 .remove = __devexit_p(ipmi_pci_remove),
b0defcdb 2296#ifdef CONFIG_PM
c305e3d3
CM		 2297 .suspend = ipmi_pci_suspend,
2298 .resume = ipmi_pci_resume,
b0defcdb
CM		 2299#endif
2300};
2301#endif /* CONFIG_PCI */
1da177e4
LT		 2302
2303
dba9b4f6
CM		 2304#ifdef CONFIG_PPC_OF
2305static int __devinit ipmi_of_probe(struct of_device *dev,
2306 const struct of_device_id *match)
2307{
2308 struct smi_info *info;
2309 struct resource resource;
2310 const int *regsize, *regspacing, *regshift;
2311 struct device_node *np = dev->node;
2312 int ret;
2313 int proplen;
2314
2315 dev_info(&dev->dev, PFX "probing via device tree\n");
2316
2317 ret = of_address_to_resource(np, 0, &resource);
2318 if (ret) {
2319 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2320 return ret;
2321 }
2322
9c25099d 2323 regsize = of_get_property(np, "reg-size", &proplen);
dba9b4f6
CM		 2324 if (regsize && proplen != 4) {
2325 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2326 return -EINVAL;
2327 }
2328
9c25099d 2329 regspacing = of_get_property(np, "reg-spacing", &proplen);
dba9b4f6
CM		 2330 if (regspacing && proplen != 4) {
2331 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2332 return -EINVAL;
2333 }
2334
9c25099d 2335 regshift = of_get_property(np, "reg-shift", &proplen);
dba9b4f6
CM		 2336 if (regshift && proplen != 4) {
2337 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2338 return -EINVAL;
2339 }
2340
2341 info = kzalloc(sizeof(*info), GFP_KERNEL);
2342
2343 if (!info) {
2344 dev_err(&dev->dev,
2345 PFX "could not allocate memory for OF probe\n");
2346 return -ENOMEM;
2347 }
2348
2349 info->si_type = (enum si_type) match->data;
2350 info->addr_source = "device-tree";
dba9b4f6
CM		 2351 info->irq_setup = std_irq_setup;
2352
3b7ec117
NC		 2353 if (resource.flags & IORESOURCE_IO) {
2354 info->io_setup = port_setup;
2355 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2356 } else {
2357 info->io_setup = mem_setup;
2358 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2359 }
2360
dba9b4f6
CM		 2361 info->io.addr_data = resource.start;
2362
2363 info->io.regsize = regsize ? *regsize : DEFAULT_REGSIZE;
2364 info->io.regspacing = regspacing ? *regspacing : DEFAULT_REGSPACING;
2365 info->io.regshift = regshift ? *regshift : 0;
2366
2367 info->irq = irq_of_parse_and_map(dev->node, 0);
2368 info->dev = &dev->dev;
2369
32d21985 2370 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %x\n",
dba9b4f6
CM		 2371 info->io.addr_data, info->io.regsize, info->io.regspacing,
2372 info->irq);
2373
9de33df4 2374 dev_set_drvdata(&dev->dev, info);
dba9b4f6
CM		 2375
2376 return try_smi_init(info);
2377}
2378
2379static int __devexit ipmi_of_remove(struct of_device *dev)
2380{
9de33df4 2381 cleanup_one_si(dev_get_drvdata(&dev->dev));
dba9b4f6
CM		 2382 return 0;
2383}
2384
2385static struct of_device_id ipmi_match[] =
2386{
c305e3d3
CM		 2387 { .type = "ipmi", .compatible = "ipmi-kcs",
2388 .data = (void *)(unsigned long) SI_KCS },
2389 { .type = "ipmi", .compatible = "ipmi-smic",
2390 .data = (void *)(unsigned long) SI_SMIC },
2391 { .type = "ipmi", .compatible = "ipmi-bt",
2392 .data = (void *)(unsigned long) SI_BT },
dba9b4f6
CM		 2393 {},
2394};
2395
c305e3d3 2396static struct of_platform_driver ipmi_of_platform_driver = {
dba9b4f6
CM		 2397 .name = "ipmi",
2398 .match_table = ipmi_match,
2399 .probe = ipmi_of_probe,
2400 .remove = __devexit_p(ipmi_of_remove),
2401};
2402#endif /* CONFIG_PPC_OF */
2403
40112ae7 2404static int wait_for_msg_done(struct smi_info *smi_info)
1da177e4 2405{
50c812b2 2406 enum si_sm_result smi_result;
1da177e4
LT		 2407
2408 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
c305e3d3 2409 for (;;) {
c3e7e791
CM		 2410 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2411 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
da4cd8df 2412 schedule_timeout_uninterruptible(1);
1da177e4
LT		 2413 smi_result = smi_info->handlers->event(
2414 smi_info->si_sm, 100);
c305e3d3 2415 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
1da177e4
LT		 2416 smi_result = smi_info->handlers->event(
2417 smi_info->si_sm, 0);
c305e3d3 2418 } else
1da177e4
LT		 2419 break;
2420 }
40112ae7 2421 if (smi_result == SI_SM_HOSED)
c305e3d3
CM		 2422 /*
2423 * We couldn't get the state machine to run, so whatever's at
2424 * the port is probably not an IPMI SMI interface.
2425 */
40112ae7
CM		 2426 return -ENODEV;
2427
2428 return 0;
2429}
2430
2431static int try_get_dev_id(struct smi_info *smi_info)
2432{
2433 unsigned char msg[2];
2434 unsigned char *resp;
2435 unsigned long resp_len;
2436 int rv = 0;
2437
2438 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2439 if (!resp)
2440 return -ENOMEM;
2441
2442 /*
2443 * Do a Get Device ID command, since it comes back with some
2444 * useful info.
2445 */
2446 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2447 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2448 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2449
2450 rv = wait_for_msg_done(smi_info);
2451 if (rv)
1da177e4 2452 goto out;
1da177e4 2453
1da177e4
LT		 2454 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2455 resp, IPMI_MAX_MSG_LENGTH);
1da177e4 2456
d8c98618
CM		 2457 /* Check and record info from the get device id, in case we need it. */
2458 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
1da177e4
LT		 2459
2460 out:
2461 kfree(resp);
2462 return rv;
2463}
2464
40112ae7
CM		 2465static int try_enable_event_buffer(struct smi_info *smi_info)
2466{
2467 unsigned char msg[3];
2468 unsigned char *resp;
2469 unsigned long resp_len;
2470 int rv = 0;
2471
2472 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2473 if (!resp)
2474 return -ENOMEM;
2475
2476 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2477 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2478 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2479
2480 rv = wait_for_msg_done(smi_info);
2481 if (rv) {
2482 printk(KERN_WARNING
2483 "ipmi_si: Error getting response from get global,"
2484 " enables command, the event buffer is not"
2485 " enabled.\n");
2486 goto out;
2487 }
2488
2489 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2490 resp, IPMI_MAX_MSG_LENGTH);
2491
2492 if (resp_len < 4 ||
2493 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2494 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2495 resp[2] != 0) {
2496 printk(KERN_WARNING
2497 "ipmi_si: Invalid return from get global"
2498 " enables command, cannot enable the event"
2499 " buffer.\n");
2500 rv = -EINVAL;
2501 goto out;
2502 }
2503
2504 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2505 /* buffer is already enabled, nothing to do. */
2506 goto out;
2507
2508 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2509 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2510 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2511 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2512
2513 rv = wait_for_msg_done(smi_info);
2514 if (rv) {
2515 printk(KERN_WARNING
2516 "ipmi_si: Error getting response from set global,"
2517 " enables command, the event buffer is not"
2518 " enabled.\n");
2519 goto out;
2520 }
2521
2522 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2523 resp, IPMI_MAX_MSG_LENGTH);
2524
2525 if (resp_len < 3 ||
2526 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2527 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2528 printk(KERN_WARNING
2529 "ipmi_si: Invalid return from get global,"
2530 "enables command, not enable the event"
2531 " buffer.\n");
2532 rv = -EINVAL;
2533 goto out;
2534 }
2535
2536 if (resp[2] != 0)
2537 /*
2538 * An error when setting the event buffer bit means
2539 * that the event buffer is not supported.
2540 */
2541 rv = -ENOENT;
2542 out:
2543 kfree(resp);
2544 return rv;
2545}
2546
1da177e4
LT		 2547static int type_file_read_proc(char *page, char **start, off_t off,
2548 int count, int *eof, void *data)
2549{
1da177e4
LT		 2550 struct smi_info *smi = data;
2551
b361e27b 2552 return sprintf(page, "%s\n", si_to_str[smi->si_type]);
1da177e4
LT		 2553}
2554
2555static int stat_file_read_proc(char *page, char **start, off_t off,
2556 int count, int *eof, void *data)
2557{
2558 char *out = (char *) page;
2559 struct smi_info *smi = data;
2560
2561 out += sprintf(out, "interrupts_enabled: %d\n",
b0defcdb 2562 smi->irq && !smi->interrupt_disabled);
64959e2d
CM		 2563 out += sprintf(out, "short_timeouts: %u\n",
2564 smi_get_stat(smi, short_timeouts));
2565 out += sprintf(out, "long_timeouts: %u\n",
2566 smi_get_stat(smi, long_timeouts));
64959e2d
CM		 2567 out += sprintf(out, "idles: %u\n",
2568 smi_get_stat(smi, idles));
2569 out += sprintf(out, "interrupts: %u\n",
2570 smi_get_stat(smi, interrupts));
2571 out += sprintf(out, "attentions: %u\n",
2572 smi_get_stat(smi, attentions));
2573 out += sprintf(out, "flag_fetches: %u\n",
2574 smi_get_stat(smi, flag_fetches));
2575 out += sprintf(out, "hosed_count: %u\n",
2576 smi_get_stat(smi, hosed_count));
2577 out += sprintf(out, "complete_transactions: %u\n",
2578 smi_get_stat(smi, complete_transactions));
2579 out += sprintf(out, "events: %u\n",
2580 smi_get_stat(smi, events));
2581 out += sprintf(out, "watchdog_pretimeouts: %u\n",
2582 smi_get_stat(smi, watchdog_pretimeouts));
2583 out += sprintf(out, "incoming_messages: %u\n",
2584 smi_get_stat(smi, incoming_messages));
1da177e4 2585
b361e27b
CM		 2586 return out - page;
2587}
2588
2589static int param_read_proc(char *page, char **start, off_t off,
2590 int count, int *eof, void *data)
2591{
2592 struct smi_info *smi = data;
2593
2594 return sprintf(page,
2595 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2596 si_to_str[smi->si_type],
2597 addr_space_to_str[smi->io.addr_type],
2598 smi->io.addr_data,
2599 smi->io.regspacing,
2600 smi->io.regsize,
2601 smi->io.regshift,
2602 smi->irq,
2603 smi->slave_addr);
1da177e4
LT		 2604}
2605
3ae0e0f9
CM		 2606/*
2607 * oem_data_avail_to_receive_msg_avail
2608 * @info - smi_info structure with msg_flags set
2609 *
2610 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2611 * Returns 1 indicating need to re-run handle_flags().
2612 */
2613static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2614{
e8b33617 2615 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
c305e3d3 2616 RECEIVE_MSG_AVAIL);
3ae0e0f9
CM		 2617 return 1;
2618}
2619
2620/*
2621 * setup_dell_poweredge_oem_data_handler
2622 * @info - smi_info.device_id must be populated
2623 *
2624 * Systems that match, but have firmware version < 1.40 may assert
2625 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2626 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2627 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2628 * as RECEIVE_MSG_AVAIL instead.
2629 *
2630 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2631 * assert the OEM[012] bits, and if it did, the driver would have to
2632 * change to handle that properly, we don't actually check for the
2633 * firmware version.
2634 * Device ID = 0x20 BMC on PowerEdge 8G servers
2635 * Device Revision = 0x80
2636 * Firmware Revision1 = 0x01 BMC version 1.40
2637 * Firmware Revision2 = 0x40 BCD encoded
2638 * IPMI Version = 0x51 IPMI 1.5
2639 * Manufacturer ID = A2 02 00 Dell IANA
2640 *
d5a2b89a
CM		 2641 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2642 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2643 *
3ae0e0f9
CM		 2644 */
2645#define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2646#define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2647#define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
50c812b2 2648#define DELL_IANA_MFR_ID 0x0002a2
3ae0e0f9
CM		 2649static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
2650{
2651 struct ipmi_device_id *id = &smi_info->device_id;
50c812b2 2652 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
d5a2b89a
CM		 2653 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
2654 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
50c812b2 2655 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
d5a2b89a
CM		 2656 smi_info->oem_data_avail_handler =
2657 oem_data_avail_to_receive_msg_avail;
c305e3d3
CM		 2658 } else if (ipmi_version_major(id) < 1 ||
2659 (ipmi_version_major(id) == 1 &&
2660 ipmi_version_minor(id) < 5)) {
d5a2b89a
CM		 2661 smi_info->oem_data_avail_handler =
2662 oem_data_avail_to_receive_msg_avail;
2663 }
3ae0e0f9
CM		 2664 }
2665}
2666
ea94027b
CM		 2667#define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2668static void return_hosed_msg_badsize(struct smi_info *smi_info)
2669{
2670 struct ipmi_smi_msg *msg = smi_info->curr_msg;
2671
2672 /* Make it a reponse */
2673 msg->rsp[0] = msg->data[0] | 4;
2674 msg->rsp[1] = msg->data[1];
2675 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
2676 msg->rsp_size = 3;
2677 smi_info->curr_msg = NULL;
2678 deliver_recv_msg(smi_info, msg);
2679}
2680
2681/*
2682 * dell_poweredge_bt_xaction_handler
2683 * @info - smi_info.device_id must be populated
2684 *
2685 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2686 * not respond to a Get SDR command if the length of the data
2687 * requested is exactly 0x3A, which leads to command timeouts and no
2688 * data returned. This intercepts such commands, and causes userspace
2689 * callers to try again with a different-sized buffer, which succeeds.
2690 */
2691
2692#define STORAGE_NETFN 0x0A
2693#define STORAGE_CMD_GET_SDR 0x23
2694static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
2695 unsigned long unused,
2696 void *in)
2697{
2698 struct smi_info *smi_info = in;
2699 unsigned char *data = smi_info->curr_msg->data;
2700 unsigned int size = smi_info->curr_msg->data_size;
2701 if (size >= 8 &&
2702 (data[0]>>2) == STORAGE_NETFN &&
2703 data[1] == STORAGE_CMD_GET_SDR &&
2704 data[7] == 0x3A) {
2705 return_hosed_msg_badsize(smi_info);
2706 return NOTIFY_STOP;
2707 }
2708 return NOTIFY_DONE;
2709}
2710
2711static struct notifier_block dell_poweredge_bt_xaction_notifier = {
2712 .notifier_call = dell_poweredge_bt_xaction_handler,
2713};
2714
2715/*
2716 * setup_dell_poweredge_bt_xaction_handler
2717 * @info - smi_info.device_id must be filled in already
2718 *
2719 * Fills in smi_info.device_id.start_transaction_pre_hook
2720 * when we know what function to use there.
2721 */
2722static void
2723setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
2724{
2725 struct ipmi_device_id *id = &smi_info->device_id;
50c812b2 2726 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
ea94027b
CM		 2727 smi_info->si_type == SI_BT)
2728 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
2729}
2730
3ae0e0f9
CM		 2731/*
2732 * setup_oem_data_handler
2733 * @info - smi_info.device_id must be filled in already
2734 *
2735 * Fills in smi_info.device_id.oem_data_available_handler
2736 * when we know what function to use there.
2737 */
2738
2739static void setup_oem_data_handler(struct smi_info *smi_info)
2740{
2741 setup_dell_poweredge_oem_data_handler(smi_info);
2742}
2743
ea94027b
CM		 2744static void setup_xaction_handlers(struct smi_info *smi_info)
2745{
2746 setup_dell_poweredge_bt_xaction_handler(smi_info);
2747}
2748
a9a2c44f
CM		 2749static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
2750{
453823ba 2751 if (smi_info->intf) {
c305e3d3
CM		 2752 /*
2753 * The timer and thread are only running if the
2754 * interface has been started up and registered.
2755 */
453823ba
CM		 2756 if (smi_info->thread != NULL)
2757 kthread_stop(smi_info->thread);
2758 del_timer_sync(&smi_info->si_timer);
2759 }
a9a2c44f
CM		 2760}
2761
7420884c 2762static __devinitdata struct ipmi_default_vals
b0defcdb
CM		 2763{
2764 int type;
2765 int port;
7420884c 2766} ipmi_defaults[] =
b0defcdb
CM		 2767{
2768 { .type = SI_KCS, .port = 0xca2 },
2769 { .type = SI_SMIC, .port = 0xca9 },
2770 { .type = SI_BT, .port = 0xe4 },
2771 { .port = 0 }
2772};
2773
2774static __devinit void default_find_bmc(void)
2775{
2776 struct smi_info *info;
2777 int i;
2778
2779 for (i = 0; ; i++) {
2780 if (!ipmi_defaults[i].port)
2781 break;
68e1ee62 2782#ifdef CONFIG_PPC
4ff31d77
CK		 2783 if (check_legacy_ioport(ipmi_defaults[i].port))
2784 continue;
2785#endif
a09f4855
AM		 2786 info = kzalloc(sizeof(*info), GFP_KERNEL);
2787 if (!info)
2788 return;
4ff31d77 2789
b0defcdb
CM		 2790 info->addr_source = NULL;
2791
2792 info->si_type = ipmi_defaults[i].type;
2793 info->io_setup = port_setup;
2794 info->io.addr_data = ipmi_defaults[i].port;
2795 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2796
2797 info->io.addr = NULL;
2798 info->io.regspacing = DEFAULT_REGSPACING;
2799 info->io.regsize = DEFAULT_REGSPACING;
2800 info->io.regshift = 0;
2801
2802 if (try_smi_init(info) == 0) {
2803 /* Found one... */
2804 printk(KERN_INFO "ipmi_si: Found default %s state"
2805 " machine at %s address 0x%lx\n",
2806 si_to_str[info->si_type],
2807 addr_space_to_str[info->io.addr_type],
2808 info->io.addr_data);
2809 return;
2810 }
2811 }
2812}
2813
2814static int is_new_interface(struct smi_info *info)
1da177e4 2815{
b0defcdb 2816 struct smi_info *e;
1da177e4 2817
b0defcdb
CM		 2818 list_for_each_entry(e, &smi_infos, link) {
2819 if (e->io.addr_type != info->io.addr_type)
2820 continue;
2821 if (e->io.addr_data == info->io.addr_data)
2822 return 0;
2823 }
1da177e4 2824
b0defcdb
CM		 2825 return 1;
2826}
1da177e4 2827
b0defcdb
CM		 2828static int try_smi_init(struct smi_info *new_smi)
2829{
2830 int rv;
64959e2d 2831 int i;
b0defcdb
CM		 2832
2833 if (new_smi->addr_source) {
2834 printk(KERN_INFO "ipmi_si: Trying %s-specified %s state"
2835 " machine at %s address 0x%lx, slave address 0x%x,"
2836 " irq %d\n",
2837 new_smi->addr_source,
2838 si_to_str[new_smi->si_type],
2839 addr_space_to_str[new_smi->io.addr_type],
2840 new_smi->io.addr_data,
2841 new_smi->slave_addr, new_smi->irq);
2842 }
2843
d6dfd131 2844 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 2845 if (!is_new_interface(new_smi)) {
2846 printk(KERN_WARNING "ipmi_si: duplicate interface\n");
2847 rv = -EBUSY;
2848 goto out_err;
2849 }
1da177e4
LT		 2850
2851 /* So we know not to free it unless we have allocated one. */
2852 new_smi->intf = NULL;
2853 new_smi->si_sm = NULL;
2854 new_smi->handlers = NULL;
2855
b0defcdb
CM		 2856 switch (new_smi->si_type) {
2857 case SI_KCS:
1da177e4 2858 new_smi->handlers = &kcs_smi_handlers;
b0defcdb
CM		 2859 break;
2860
2861 case SI_SMIC:
1da177e4 2862 new_smi->handlers = &smic_smi_handlers;
b0defcdb
CM		 2863 break;
2864
2865 case SI_BT:
1da177e4 2866 new_smi->handlers = &bt_smi_handlers;
b0defcdb
CM		 2867 break;
2868
2869 default:
1da177e4
LT		 2870 /* No support for anything else yet. */
2871 rv = -EIO;
2872 goto out_err;
2873 }
2874
2875 /* Allocate the state machine's data and initialize it. */
2876 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
b0defcdb 2877 if (!new_smi->si_sm) {
c305e3d3 2878 printk(KERN_ERR "Could not allocate state machine memory\n");
1da177e4
LT		 2879 rv = -ENOMEM;
2880 goto out_err;
2881 }
2882 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
2883 &new_smi->io);
2884
2885 /* Now that we know the I/O size, we can set up the I/O. */
2886 rv = new_smi->io_setup(new_smi);
2887 if (rv) {
c305e3d3 2888 printk(KERN_ERR "Could not set up I/O space\n");
1da177e4
LT		 2889 goto out_err;
2890 }
2891
2892 spin_lock_init(&(new_smi->si_lock));
2893 spin_lock_init(&(new_smi->msg_lock));
1da177e4
LT		 2894
2895 /* Do low-level detection first. */
2896 if (new_smi->handlers->detect(new_smi->si_sm)) {
b0defcdb
CM		 2897 if (new_smi->addr_source)
2898 printk(KERN_INFO "ipmi_si: Interface detection"
2899 " failed\n");
1da177e4
LT		 2900 rv = -ENODEV;
2901 goto out_err;
2902 }
2903
c305e3d3
CM		 2904 /*
2905 * Attempt a get device id command. If it fails, we probably
2906 * don't have a BMC here.
2907 */
1da177e4 2908 rv = try_get_dev_id(new_smi);
b0defcdb
CM		 2909 if (rv) {
2910 if (new_smi->addr_source)
2911 printk(KERN_INFO "ipmi_si: There appears to be no BMC"
2912 " at this location\n");
1da177e4 2913 goto out_err;
b0defcdb 2914 }
1da177e4 2915
3ae0e0f9 2916 setup_oem_data_handler(new_smi);
ea94027b 2917 setup_xaction_handlers(new_smi);
3ae0e0f9 2918
1da177e4
LT		 2919 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
2920 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
2921 new_smi->curr_msg = NULL;
2922 atomic_set(&new_smi->req_events, 0);
2923 new_smi->run_to_completion = 0;
64959e2d
CM		 2924 for (i = 0; i < SI_NUM_STATS; i++)
2925 atomic_set(&new_smi->stats[i], 0);
1da177e4
LT		 2926
2927 new_smi->interrupt_disabled = 0;
a9a2c44f 2928 atomic_set(&new_smi->stop_operation, 0);
b0defcdb
CM		 2929 new_smi->intf_num = smi_num;
2930 smi_num++;
1da177e4 2931
40112ae7
CM		 2932 rv = try_enable_event_buffer(new_smi);
2933 if (rv == 0)
2934 new_smi->has_event_buffer = 1;
2935
c305e3d3
CM		 2936 /*
2937 * Start clearing the flags before we enable interrupts or the
2938 * timer to avoid racing with the timer.
2939 */
1da177e4
LT		 2940 start_clear_flags(new_smi);
2941 /* IRQ is defined to be set when non-zero. */
2942 if (new_smi->irq)
2943 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
2944
50c812b2 2945 if (!new_smi->dev) {
c305e3d3
CM		 2946 /*
2947 * If we don't already have a device from something
2948 * else (like PCI), then register a new one.
2949 */
50c812b2
CM		 2950 new_smi->pdev = platform_device_alloc("ipmi_si",
2951 new_smi->intf_num);
8b32b5d0 2952 if (!new_smi->pdev) {
50c812b2
CM		 2953 printk(KERN_ERR
2954 "ipmi_si_intf:"
2955 " Unable to allocate platform device\n");
453823ba 2956 goto out_err;
50c812b2
CM		 2957 }
2958 new_smi->dev = &new_smi->pdev->dev;
fe2d5ffc 2959 new_smi->dev->driver = &ipmi_driver.driver;
50c812b2 2960
b48f5457 2961 rv = platform_device_add(new_smi->pdev);
50c812b2
CM		 2962 if (rv) {
2963 printk(KERN_ERR
2964 "ipmi_si_intf:"
2965 " Unable to register system interface device:"
2966 " %d\n",
2967 rv);
453823ba 2968 goto out_err;
50c812b2
CM		 2969 }
2970 new_smi->dev_registered = 1;
2971 }
2972
1da177e4
LT		 2973 rv = ipmi_register_smi(&handlers,
2974 new_smi,
50c812b2
CM		 2975 &new_smi->device_id,
2976 new_smi->dev,
759643b8 2977 "bmc",
453823ba 2978 new_smi->slave_addr);
1da177e4
LT		 2979 if (rv) {
2980 printk(KERN_ERR
2981 "ipmi_si: Unable to register device: error %d\n",
2982 rv);
2983 goto out_err_stop_timer;
2984 }
2985
2986 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
fa68be0d 2987 type_file_read_proc,
99b76233 2988 new_smi);
1da177e4
LT		 2989 if (rv) {
2990 printk(KERN_ERR
2991 "ipmi_si: Unable to create proc entry: %d\n",
2992 rv);
2993 goto out_err_stop_timer;
2994 }
2995
2996 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
fa68be0d 2997 stat_file_read_proc,
99b76233 2998 new_smi);
1da177e4
LT		 2999 if (rv) {
3000 printk(KERN_ERR
3001 "ipmi_si: Unable to create proc entry: %d\n",
3002 rv);
3003 goto out_err_stop_timer;
3004 }
3005
b361e27b 3006 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
fa68be0d 3007 param_read_proc,
99b76233 3008 new_smi);
b361e27b
CM		 3009 if (rv) {
3010 printk(KERN_ERR
3011 "ipmi_si: Unable to create proc entry: %d\n",
3012 rv);
3013 goto out_err_stop_timer;
3014 }
3015
b0defcdb
CM		 3016 list_add_tail(&new_smi->link, &smi_infos);
3017
d6dfd131 3018 mutex_unlock(&smi_infos_lock);
1da177e4 3019
c305e3d3
CM		 3020 printk(KERN_INFO "IPMI %s interface initialized\n",
3021 si_to_str[new_smi->si_type]);
1da177e4
LT		 3022
3023 return 0;
3024
3025 out_err_stop_timer:
a9a2c44f
CM		 3026 atomic_inc(&new_smi->stop_operation);
3027 wait_for_timer_and_thread(new_smi);
1da177e4
LT		 3028
3029 out_err:
3030 if (new_smi->intf)
3031 ipmi_unregister_smi(new_smi->intf);
3032
b0defcdb
CM		 3033 if (new_smi->irq_cleanup)
3034 new_smi->irq_cleanup(new_smi);
1da177e4 3035
c305e3d3
CM		 3036 /*
3037 * Wait until we know that we are out of any interrupt
3038 * handlers might have been running before we freed the
3039 * interrupt.
3040 */
fbd568a3 3041 synchronize_sched();
1da177e4
LT		 3042
3043 if (new_smi->si_sm) {
3044 if (new_smi->handlers)
3045 new_smi->handlers->cleanup(new_smi->si_sm);
3046 kfree(new_smi->si_sm);
3047 }
b0defcdb
CM		 3048 if (new_smi->addr_source_cleanup)
3049 new_smi->addr_source_cleanup(new_smi);
7767e126
PG		 3050 if (new_smi->io_cleanup)
3051 new_smi->io_cleanup(new_smi);
1da177e4 3052
50c812b2
CM		 3053 if (new_smi->dev_registered)
3054 platform_device_unregister(new_smi->pdev);
3055
3056 kfree(new_smi);
3057
d6dfd131 3058 mutex_unlock(&smi_infos_lock);
b0defcdb 3059
1da177e4
LT		 3060 return rv;
3061}
3062
b0defcdb 3063static __devinit int init_ipmi_si(void)
1da177e4 3064{
1da177e4
LT		 3065 int i;
3066 char *str;
50c812b2 3067 int rv;
1da177e4
LT		 3068
3069 if (initialized)
3070 return 0;
3071 initialized = 1;
3072
50c812b2 3073 /* Register the device drivers. */
fe2d5ffc 3074 rv = driver_register(&ipmi_driver.driver);
50c812b2
CM		 3075 if (rv) {
3076 printk(KERN_ERR
3077 "init_ipmi_si: Unable to register driver: %d\n",
3078 rv);
3079 return rv;
3080 }
3081
3082
1da177e4
LT		 3083 /* Parse out the si_type string into its components. */
3084 str = si_type_str;
3085 if (*str != '\0') {
e8b33617 3086 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
1da177e4
LT		 3087 si_type[i] = str;
3088 str = strchr(str, ',');
3089 if (str) {
3090 *str = '\0';
3091 str++;
3092 } else {
3093 break;
3094 }
3095 }
3096 }
3097
1fdd75bd 3098 printk(KERN_INFO "IPMI System Interface driver.\n");
1da177e4 3099
b0defcdb
CM		 3100 hardcode_find_bmc();
3101
a9fad4cc 3102#ifdef CONFIG_DMI
b224cd3a 3103 dmi_find_bmc();
1da177e4
LT		 3104#endif
3105
b0defcdb 3106#ifdef CONFIG_ACPI
1d5636cc 3107 acpi_find_bmc();
b0defcdb 3108#endif
1da177e4 3109
b0defcdb 3110#ifdef CONFIG_PCI
168b35a7 3111 rv = pci_register_driver(&ipmi_pci_driver);
c305e3d3 3112 if (rv)
168b35a7
CM		 3113 printk(KERN_ERR
3114 "init_ipmi_si: Unable to register PCI driver: %d\n",
3115 rv);
b0defcdb
CM		 3116#endif
3117
dba9b4f6
CM		 3118#ifdef CONFIG_PPC_OF
3119 of_register_platform_driver(&ipmi_of_platform_driver);
3120#endif
3121
b0defcdb 3122 if (si_trydefaults) {
d6dfd131 3123 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 3124 if (list_empty(&smi_infos)) {
3125 /* No BMC was found, try defaults. */
d6dfd131 3126 mutex_unlock(&smi_infos_lock);
b0defcdb
CM		 3127 default_find_bmc();
3128 } else {
d6dfd131 3129 mutex_unlock(&smi_infos_lock);
b0defcdb 3130 }
1da177e4
LT		 3131 }
3132
d6dfd131 3133 mutex_lock(&smi_infos_lock);
b361e27b 3134 if (unload_when_empty && list_empty(&smi_infos)) {
d6dfd131 3135 mutex_unlock(&smi_infos_lock);
b0defcdb
CM		 3136#ifdef CONFIG_PCI
3137 pci_unregister_driver(&ipmi_pci_driver);
3138#endif
10fb62e5
CK		 3139
3140#ifdef CONFIG_PPC_OF
3141 of_unregister_platform_driver(&ipmi_of_platform_driver);
3142#endif
fe2d5ffc 3143 driver_unregister(&ipmi_driver.driver);
c305e3d3
CM		 3144 printk(KERN_WARNING
3145 "ipmi_si: Unable to find any System Interface(s)\n");
1da177e4 3146 return -ENODEV;
b0defcdb 3147 } else {
d6dfd131 3148 mutex_unlock(&smi_infos_lock);
b0defcdb 3149 return 0;
1da177e4 3150 }
1da177e4
LT		 3151}
3152module_init(init_ipmi_si);
3153
b361e27b 3154static void cleanup_one_si(struct smi_info *to_clean)
1da177e4
LT		 3155{
3156 int rv;
3157 unsigned long flags;
3158
b0defcdb 3159 if (!to_clean)
1da177e4
LT		 3160 return;
3161
b0defcdb
CM		 3162 list_del(&to_clean->link);
3163
ee6cd5f8 3164 /* Tell the driver that we are shutting down. */
a9a2c44f 3165 atomic_inc(&to_clean->stop_operation);
b0defcdb 3166
c305e3d3
CM		 3167 /*
3168 * Make sure the timer and thread are stopped and will not run
3169 * again.
3170 */
a9a2c44f 3171 wait_for_timer_and_thread(to_clean);
1da177e4 3172
c305e3d3
CM		 3173 /*
3174 * Timeouts are stopped, now make sure the interrupts are off
3175 * for the device. A little tricky with locks to make sure
3176 * there are no races.
3177 */
ee6cd5f8
CM		 3178 spin_lock_irqsave(&to_clean->si_lock, flags);
3179 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3180 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3181 poll(to_clean);
3182 schedule_timeout_uninterruptible(1);
3183 spin_lock_irqsave(&to_clean->si_lock, flags);
3184 }
3185 disable_si_irq(to_clean);
3186 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3187 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3188 poll(to_clean);
3189 schedule_timeout_uninterruptible(1);
3190 }
3191
3192 /* Clean up interrupts and make sure that everything is done. */
3193 if (to_clean->irq_cleanup)
3194 to_clean->irq_cleanup(to_clean);
e8b33617 3195 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
1da177e4 3196 poll(to_clean);
da4cd8df 3197 schedule_timeout_uninterruptible(1);
1da177e4
LT		 3198 }
3199
3200 rv = ipmi_unregister_smi(to_clean->intf);
3201 if (rv) {
3202 printk(KERN_ERR
3203 "ipmi_si: Unable to unregister device: errno=%d\n",
3204 rv);
3205 }
3206
3207 to_clean->handlers->cleanup(to_clean->si_sm);
3208
3209 kfree(to_clean->si_sm);
3210
b0defcdb
CM		 3211 if (to_clean->addr_source_cleanup)
3212 to_clean->addr_source_cleanup(to_clean);
7767e126
PG		 3213 if (to_clean->io_cleanup)
3214 to_clean->io_cleanup(to_clean);
50c812b2
CM		 3215
3216 if (to_clean->dev_registered)
3217 platform_device_unregister(to_clean->pdev);
3218
3219 kfree(to_clean);
1da177e4
LT		 3220}
3221
3222static __exit void cleanup_ipmi_si(void)
3223{
b0defcdb 3224 struct smi_info *e, *tmp_e;
1da177e4 3225
b0defcdb 3226 if (!initialized)
1da177e4
LT		 3227 return;
3228
b0defcdb
CM		 3229#ifdef CONFIG_PCI
3230 pci_unregister_driver(&ipmi_pci_driver);
3231#endif
3232
dba9b4f6
CM		 3233#ifdef CONFIG_PPC_OF
3234 of_unregister_platform_driver(&ipmi_of_platform_driver);
3235#endif
3236
d6dfd131 3237 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 3238 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3239 cleanup_one_si(e);
d6dfd131 3240 mutex_unlock(&smi_infos_lock);
50c812b2 3241
fe2d5ffc 3242 driver_unregister(&ipmi_driver.driver);
1da177e4
LT		 3243}
3244module_exit(cleanup_ipmi_si);
3245
3246MODULE_LICENSE("GPL");
1fdd75bd 3247MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
c305e3d3
CM		 3248MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3249 " system interfaces.");
Linux kernel - Deliverables
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