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ipmi: add parameter to limit CPU usage in kipmid
[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>
9e368fa0 67#include <linux/pnp.h>
b361e27b 68
dba9b4f6 69#ifdef CONFIG_PPC_OF
11c675ce
SR		 70#include <linux/of_device.h>
71#include <linux/of_platform.h>
dba9b4f6
CM		 72#endif
73
b361e27b 74#define PFX "ipmi_si: "
1da177e4
LT		 75
76/* Measure times between events in the driver. */
77#undef DEBUG_TIMING
78
79/* Call every 10 ms. */
80#define SI_TIMEOUT_TIME_USEC 10000
81#define SI_USEC_PER_JIFFY (1000000/HZ)
82#define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
83#define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
c305e3d3 84 short timeout */
1da177e4
LT		 85
86enum si_intf_state {
87 SI_NORMAL,
88 SI_GETTING_FLAGS,
89 SI_GETTING_EVENTS,
90 SI_CLEARING_FLAGS,
91 SI_CLEARING_FLAGS_THEN_SET_IRQ,
92 SI_GETTING_MESSAGES,
93 SI_ENABLE_INTERRUPTS1,
ee6cd5f8
CM		 94 SI_ENABLE_INTERRUPTS2,
95 SI_DISABLE_INTERRUPTS1,
96 SI_DISABLE_INTERRUPTS2
1da177e4
LT		 97 /* FIXME - add watchdog stuff. */
98};
99
9dbf68f9
CM		 100/* Some BT-specific defines we need here. */
101#define IPMI_BT_INTMASK_REG 2
102#define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
103#define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
104
1da177e4
LT		 105enum si_type {
106 SI_KCS, SI_SMIC, SI_BT
107};
b361e27b 108static char *si_to_str[] = { "kcs", "smic", "bt" };
1da177e4 109
50c812b2
CM		 110#define DEVICE_NAME "ipmi_si"
111
fe2d5ffc
DW		 112static struct platform_driver ipmi_driver = {
113 .driver = {
114 .name = DEVICE_NAME,
115 .bus = &platform_bus_type
116 }
50c812b2 117};
3ae0e0f9 118
64959e2d
CM		 119
120/*
121 * Indexes into stats[] in smi_info below.
122 */
ba8ff1c6
CM		 123enum si_stat_indexes {
124 /*
125 * Number of times the driver requested a timer while an operation
126 * was in progress.
127 */
128 SI_STAT_short_timeouts = 0,
129
130 /*
131 * Number of times the driver requested a timer while nothing was in
132 * progress.
133 */
134 SI_STAT_long_timeouts,
135
136 /* Number of times the interface was idle while being polled. */
137 SI_STAT_idles,
138
139 /* Number of interrupts the driver handled. */
140 SI_STAT_interrupts,
141
142 /* Number of time the driver got an ATTN from the hardware. */
143 SI_STAT_attentions,
64959e2d 144
ba8ff1c6
CM		 145 /* Number of times the driver requested flags from the hardware. */
146 SI_STAT_flag_fetches,
147
148 /* Number of times the hardware didn't follow the state machine. */
149 SI_STAT_hosed_count,
150
151 /* Number of completed messages. */
152 SI_STAT_complete_transactions,
153
154 /* Number of IPMI events received from the hardware. */
155 SI_STAT_events,
156
157 /* Number of watchdog pretimeouts. */
158 SI_STAT_watchdog_pretimeouts,
159
160 /* Number of asyncronous messages received. */
161 SI_STAT_incoming_messages,
162
163
164 /* This *must* remain last, add new values above this. */
165 SI_NUM_STATS
166};
64959e2d 167
c305e3d3 168struct smi_info {
a9a2c44f 169 int intf_num;
1da177e4
LT		 170 ipmi_smi_t intf;
171 struct si_sm_data *si_sm;
172 struct si_sm_handlers *handlers;
173 enum si_type si_type;
174 spinlock_t si_lock;
175 spinlock_t msg_lock;
176 struct list_head xmit_msgs;
177 struct list_head hp_xmit_msgs;
178 struct ipmi_smi_msg *curr_msg;
179 enum si_intf_state si_state;
180
c305e3d3
CM		 181 /*
182 * Used to handle the various types of I/O that can occur with
183 * IPMI
184 */
1da177e4
LT		 185 struct si_sm_io io;
186 int (*io_setup)(struct smi_info *info);
187 void (*io_cleanup)(struct smi_info *info);
188 int (*irq_setup)(struct smi_info *info);
189 void (*irq_cleanup)(struct smi_info *info);
190 unsigned int io_size;
b0defcdb
CM		 191 char *addr_source; /* ACPI, PCI, SMBIOS, hardcode, default. */
192 void (*addr_source_cleanup)(struct smi_info *info);
193 void *addr_source_data;
1da177e4 194
c305e3d3
CM		 195 /*
196 * Per-OEM handler, called from handle_flags(). Returns 1
197 * when handle_flags() needs to be re-run or 0 indicating it
198 * set si_state itself.
199 */
3ae0e0f9
CM		 200 int (*oem_data_avail_handler)(struct smi_info *smi_info);
201
c305e3d3
CM		 202 /*
203 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
204 * is set to hold the flags until we are done handling everything
205 * from the flags.
206 */
1da177e4
LT		 207#define RECEIVE_MSG_AVAIL 0x01
208#define EVENT_MSG_BUFFER_FULL 0x02
209#define WDT_PRE_TIMEOUT_INT 0x08
3ae0e0f9
CM		 210#define OEM0_DATA_AVAIL 0x20
211#define OEM1_DATA_AVAIL 0x40
212#define OEM2_DATA_AVAIL 0x80
213#define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
c305e3d3
CM		 214 OEM1_DATA_AVAIL | \
215 OEM2_DATA_AVAIL)
1da177e4
LT		 216 unsigned char msg_flags;
217
40112ae7
CM		 218 /* Does the BMC have an event buffer? */
219 char has_event_buffer;
220
c305e3d3
CM		 221 /*
222 * If set to true, this will request events the next time the
223 * state machine is idle.
224 */
1da177e4
LT		 225 atomic_t req_events;
226
c305e3d3
CM		 227 /*
228 * If true, run the state machine to completion on every send
229 * call. Generally used after a panic to make sure stuff goes
230 * out.
231 */
1da177e4
LT		 232 int run_to_completion;
233
234 /* The I/O port of an SI interface. */
235 int port;
236
c305e3d3
CM		 237 /*
238 * The space between start addresses of the two ports. For
239 * instance, if the first port is 0xca2 and the spacing is 4, then
240 * the second port is 0xca6.
241 */
1da177e4
LT		 242 unsigned int spacing;
243
244 /* zero if no irq; */
245 int irq;
246
247 /* The timer for this si. */
248 struct timer_list si_timer;
249
250 /* The time (in jiffies) the last timeout occurred at. */
251 unsigned long last_timeout_jiffies;
252
253 /* Used to gracefully stop the timer without race conditions. */
a9a2c44f 254 atomic_t stop_operation;
1da177e4 255
c305e3d3
CM		 256 /*
257 * The driver will disable interrupts when it gets into a
258 * situation where it cannot handle messages due to lack of
259 * memory. Once that situation clears up, it will re-enable
260 * interrupts.
261 */
1da177e4
LT		 262 int interrupt_disabled;
263
50c812b2 264 /* From the get device id response... */
3ae0e0f9 265 struct ipmi_device_id device_id;
1da177e4 266
50c812b2
CM		 267 /* Driver model stuff. */
268 struct device *dev;
269 struct platform_device *pdev;
270
c305e3d3
CM		 271 /*
272 * True if we allocated the device, false if it came from
273 * someplace else (like PCI).
274 */
50c812b2
CM		 275 int dev_registered;
276
1da177e4
LT		 277 /* Slave address, could be reported from DMI. */
278 unsigned char slave_addr;
279
280 /* Counters and things for the proc filesystem. */
64959e2d 281 atomic_t stats[SI_NUM_STATS];
a9a2c44f 282
c305e3d3 283 struct task_struct *thread;
b0defcdb
CM		 284
285 struct list_head link;
1da177e4
LT		 286};
287
64959e2d
CM		 288#define smi_inc_stat(smi, stat) \
289 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
290#define smi_get_stat(smi, stat) \
291 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
292
a51f4a81
CM		 293#define SI_MAX_PARMS 4
294
295static int force_kipmid[SI_MAX_PARMS];
296static int num_force_kipmid;
297
ae74e823
MW		 298static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
299static int num_max_busy_us;
300
b361e27b
CM		 301static int unload_when_empty = 1;
302
b0defcdb 303static int try_smi_init(struct smi_info *smi);
b361e27b 304static void cleanup_one_si(struct smi_info *to_clean);
b0defcdb 305
e041c683 306static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
c305e3d3 307static int register_xaction_notifier(struct notifier_block *nb)
ea94027b 308{
e041c683 309 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
ea94027b
CM		 310}
311
1da177e4
LT		 312static void deliver_recv_msg(struct smi_info *smi_info,
313 struct ipmi_smi_msg *msg)
314{
315 /* Deliver the message to the upper layer with the lock
c305e3d3 316 released. */
1da177e4
LT		 317 spin_unlock(&(smi_info->si_lock));
318 ipmi_smi_msg_received(smi_info->intf, msg);
319 spin_lock(&(smi_info->si_lock));
320}
321
4d7cbac7 322static void return_hosed_msg(struct smi_info *smi_info, int cCode)
1da177e4
LT		 323{
324 struct ipmi_smi_msg *msg = smi_info->curr_msg;
325
4d7cbac7
CM		 326 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
327 cCode = IPMI_ERR_UNSPECIFIED;
328 /* else use it as is */
329
1da177e4
LT		 330 /* Make it a reponse */
331 msg->rsp[0] = msg->data[0] | 4;
332 msg->rsp[1] = msg->data[1];
4d7cbac7 333 msg->rsp[2] = cCode;
1da177e4
LT		 334 msg->rsp_size = 3;
335
336 smi_info->curr_msg = NULL;
337 deliver_recv_msg(smi_info, msg);
338}
339
340static enum si_sm_result start_next_msg(struct smi_info *smi_info)
341{
342 int rv;
343 struct list_head *entry = NULL;
344#ifdef DEBUG_TIMING
345 struct timeval t;
346#endif
347
c305e3d3
CM		 348 /*
349 * No need to save flags, we aleady have interrupts off and we
350 * already hold the SMI lock.
351 */
5956dce1
KB		 352 if (!smi_info->run_to_completion)
353 spin_lock(&(smi_info->msg_lock));
1da177e4
LT		 354
355 /* Pick the high priority queue first. */
b0defcdb 356 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
1da177e4 357 entry = smi_info->hp_xmit_msgs.next;
b0defcdb 358 } else if (!list_empty(&(smi_info->xmit_msgs))) {
1da177e4
LT		 359 entry = smi_info->xmit_msgs.next;
360 }
361
b0defcdb 362 if (!entry) {
1da177e4
LT		 363 smi_info->curr_msg = NULL;
364 rv = SI_SM_IDLE;
365 } else {
366 int err;
367
368 list_del(entry);
369 smi_info->curr_msg = list_entry(entry,
370 struct ipmi_smi_msg,
371 link);
372#ifdef DEBUG_TIMING
373 do_gettimeofday(&t);
c305e3d3 374 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4 375#endif
e041c683
AS		 376 err = atomic_notifier_call_chain(&xaction_notifier_list,
377 0, smi_info);
ea94027b
CM		 378 if (err & NOTIFY_STOP_MASK) {
379 rv = SI_SM_CALL_WITHOUT_DELAY;
380 goto out;
381 }
1da177e4
LT		 382 err = smi_info->handlers->start_transaction(
383 smi_info->si_sm,
384 smi_info->curr_msg->data,
385 smi_info->curr_msg->data_size);
c305e3d3 386 if (err)
4d7cbac7 387 return_hosed_msg(smi_info, err);
1da177e4
LT		 388
389 rv = SI_SM_CALL_WITHOUT_DELAY;
390 }
c305e3d3 391 out:
5956dce1
KB		 392 if (!smi_info->run_to_completion)
393 spin_unlock(&(smi_info->msg_lock));
1da177e4
LT		 394
395 return rv;
396}
397
398static void start_enable_irq(struct smi_info *smi_info)
399{
400 unsigned char msg[2];
401
c305e3d3
CM		 402 /*
403 * If we are enabling interrupts, we have to tell the
404 * BMC to use them.
405 */
1da177e4
LT		 406 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
407 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
408
409 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
410 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
411}
412
ee6cd5f8
CM		 413static void start_disable_irq(struct smi_info *smi_info)
414{
415 unsigned char msg[2];
416
417 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
418 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
419
420 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
421 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
422}
423
1da177e4
LT		 424static void start_clear_flags(struct smi_info *smi_info)
425{
426 unsigned char msg[3];
427
428 /* Make sure the watchdog pre-timeout flag is not set at startup. */
429 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
430 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
431 msg[2] = WDT_PRE_TIMEOUT_INT;
432
433 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
434 smi_info->si_state = SI_CLEARING_FLAGS;
435}
436
c305e3d3
CM		 437/*
438 * When we have a situtaion where we run out of memory and cannot
439 * allocate messages, we just leave them in the BMC and run the system
440 * polled until we can allocate some memory. Once we have some
441 * memory, we will re-enable the interrupt.
442 */
1da177e4
LT		 443static inline void disable_si_irq(struct smi_info *smi_info)
444{
b0defcdb 445 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
ee6cd5f8 446 start_disable_irq(smi_info);
1da177e4
LT		 447 smi_info->interrupt_disabled = 1;
448 }
449}
450
451static inline void enable_si_irq(struct smi_info *smi_info)
452{
453 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
ee6cd5f8 454 start_enable_irq(smi_info);
1da177e4
LT		 455 smi_info->interrupt_disabled = 0;
456 }
457}
458
459static void handle_flags(struct smi_info *smi_info)
460{
3ae0e0f9 461 retry:
1da177e4
LT		 462 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
463 /* Watchdog pre-timeout */
64959e2d 464 smi_inc_stat(smi_info, watchdog_pretimeouts);
1da177e4
LT		 465
466 start_clear_flags(smi_info);
467 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
468 spin_unlock(&(smi_info->si_lock));
469 ipmi_smi_watchdog_pretimeout(smi_info->intf);
470 spin_lock(&(smi_info->si_lock));
471 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
472 /* Messages available. */
473 smi_info->curr_msg = ipmi_alloc_smi_msg();
b0defcdb 474 if (!smi_info->curr_msg) {
1da177e4
LT		 475 disable_si_irq(smi_info);
476 smi_info->si_state = SI_NORMAL;
477 return;
478 }
479 enable_si_irq(smi_info);
480
481 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
482 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
483 smi_info->curr_msg->data_size = 2;
484
485 smi_info->handlers->start_transaction(
486 smi_info->si_sm,
487 smi_info->curr_msg->data,
488 smi_info->curr_msg->data_size);
489 smi_info->si_state = SI_GETTING_MESSAGES;
490 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
491 /* Events available. */
492 smi_info->curr_msg = ipmi_alloc_smi_msg();
b0defcdb 493 if (!smi_info->curr_msg) {
1da177e4
LT		 494 disable_si_irq(smi_info);
495 smi_info->si_state = SI_NORMAL;
496 return;
497 }
498 enable_si_irq(smi_info);
499
500 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
501 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
502 smi_info->curr_msg->data_size = 2;
503
504 smi_info->handlers->start_transaction(
505 smi_info->si_sm,
506 smi_info->curr_msg->data,
507 smi_info->curr_msg->data_size);
508 smi_info->si_state = SI_GETTING_EVENTS;
4064d5ef 509 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
c305e3d3 510 smi_info->oem_data_avail_handler) {
4064d5ef
CM		 511 if (smi_info->oem_data_avail_handler(smi_info))
512 goto retry;
c305e3d3 513 } else
1da177e4 514 smi_info->si_state = SI_NORMAL;
1da177e4
LT		 515}
516
517static void handle_transaction_done(struct smi_info *smi_info)
518{
519 struct ipmi_smi_msg *msg;
520#ifdef DEBUG_TIMING
521 struct timeval t;
522
523 do_gettimeofday(&t);
c305e3d3 524 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 525#endif
526 switch (smi_info->si_state) {
527 case SI_NORMAL:
b0defcdb 528 if (!smi_info->curr_msg)
1da177e4
LT		 529 break;
530
531 smi_info->curr_msg->rsp_size
532 = smi_info->handlers->get_result(
533 smi_info->si_sm,
534 smi_info->curr_msg->rsp,
535 IPMI_MAX_MSG_LENGTH);
536
c305e3d3
CM		 537 /*
538 * Do this here becase deliver_recv_msg() releases the
539 * lock, and a new message can be put in during the
540 * time the lock is released.
541 */
1da177e4
LT		 542 msg = smi_info->curr_msg;
543 smi_info->curr_msg = NULL;
544 deliver_recv_msg(smi_info, msg);
545 break;
546
547 case SI_GETTING_FLAGS:
548 {
549 unsigned char msg[4];
550 unsigned int len;
551
552 /* We got the flags from the SMI, now handle them. */
553 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
554 if (msg[2] != 0) {
c305e3d3 555 /* Error fetching flags, just give up for now. */
1da177e4
LT		 556 smi_info->si_state = SI_NORMAL;
557 } else if (len < 4) {
c305e3d3
CM		 558 /*
559 * Hmm, no flags. That's technically illegal, but
560 * don't use uninitialized data.
561 */
1da177e4
LT		 562 smi_info->si_state = SI_NORMAL;
563 } else {
564 smi_info->msg_flags = msg[3];
565 handle_flags(smi_info);
566 }
567 break;
568 }
569
570 case SI_CLEARING_FLAGS:
571 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
572 {
573 unsigned char msg[3];
574
575 /* We cleared the flags. */
576 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
577 if (msg[2] != 0) {
578 /* Error clearing flags */
579 printk(KERN_WARNING
580 "ipmi_si: Error clearing flags: %2.2x\n",
581 msg[2]);
582 }
583 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
584 start_enable_irq(smi_info);
585 else
586 smi_info->si_state = SI_NORMAL;
587 break;
588 }
589
590 case SI_GETTING_EVENTS:
591 {
592 smi_info->curr_msg->rsp_size
593 = smi_info->handlers->get_result(
594 smi_info->si_sm,
595 smi_info->curr_msg->rsp,
596 IPMI_MAX_MSG_LENGTH);
597
c305e3d3
CM		 598 /*
599 * Do this here becase deliver_recv_msg() releases the
600 * lock, and a new message can be put in during the
601 * time the lock is released.
602 */
1da177e4
LT		 603 msg = smi_info->curr_msg;
604 smi_info->curr_msg = NULL;
605 if (msg->rsp[2] != 0) {
606 /* Error getting event, probably done. */
607 msg->done(msg);
608
609 /* Take off the event flag. */
610 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
611 handle_flags(smi_info);
612 } else {
64959e2d 613 smi_inc_stat(smi_info, events);
1da177e4 614
c305e3d3
CM		 615 /*
616 * Do this before we deliver the message
617 * because delivering the message releases the
618 * lock and something else can mess with the
619 * state.
620 */
1da177e4
LT		 621 handle_flags(smi_info);
622
623 deliver_recv_msg(smi_info, msg);
624 }
625 break;
626 }
627
628 case SI_GETTING_MESSAGES:
629 {
630 smi_info->curr_msg->rsp_size
631 = smi_info->handlers->get_result(
632 smi_info->si_sm,
633 smi_info->curr_msg->rsp,
634 IPMI_MAX_MSG_LENGTH);
635
c305e3d3
CM		 636 /*
637 * Do this here becase deliver_recv_msg() releases the
638 * lock, and a new message can be put in during the
639 * time the lock is released.
640 */
1da177e4
LT		 641 msg = smi_info->curr_msg;
642 smi_info->curr_msg = NULL;
643 if (msg->rsp[2] != 0) {
644 /* Error getting event, probably done. */
645 msg->done(msg);
646
647 /* Take off the msg flag. */
648 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
649 handle_flags(smi_info);
650 } else {
64959e2d 651 smi_inc_stat(smi_info, incoming_messages);
1da177e4 652
c305e3d3
CM		 653 /*
654 * Do this before we deliver the message
655 * because delivering the message releases the
656 * lock and something else can mess with the
657 * state.
658 */
1da177e4
LT		 659 handle_flags(smi_info);
660
661 deliver_recv_msg(smi_info, msg);
662 }
663 break;
664 }
665
666 case SI_ENABLE_INTERRUPTS1:
667 {
668 unsigned char msg[4];
669
670 /* We got the flags from the SMI, now handle them. */
671 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
672 if (msg[2] != 0) {
673 printk(KERN_WARNING
674 "ipmi_si: Could not enable interrupts"
675 ", failed get, using polled mode.\n");
676 smi_info->si_state = SI_NORMAL;
677 } else {
678 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
679 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
ee6cd5f8
CM		 680 msg[2] = (msg[3] |
681 IPMI_BMC_RCV_MSG_INTR |
682 IPMI_BMC_EVT_MSG_INTR);
1da177e4
LT		 683 smi_info->handlers->start_transaction(
684 smi_info->si_sm, msg, 3);
685 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
686 }
687 break;
688 }
689
690 case SI_ENABLE_INTERRUPTS2:
691 {
692 unsigned char msg[4];
693
694 /* We got the flags from the SMI, now handle them. */
695 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
696 if (msg[2] != 0) {
697 printk(KERN_WARNING
698 "ipmi_si: Could not enable interrupts"
699 ", failed set, using polled mode.\n");
700 }
701 smi_info->si_state = SI_NORMAL;
702 break;
703 }
ee6cd5f8
CM		 704
705 case SI_DISABLE_INTERRUPTS1:
706 {
707 unsigned char msg[4];
708
709 /* We got the flags from the SMI, now handle them. */
710 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
711 if (msg[2] != 0) {
712 printk(KERN_WARNING
713 "ipmi_si: Could not disable interrupts"
714 ", failed get.\n");
715 smi_info->si_state = SI_NORMAL;
716 } else {
717 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
718 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
719 msg[2] = (msg[3] &
720 ~(IPMI_BMC_RCV_MSG_INTR |
721 IPMI_BMC_EVT_MSG_INTR));
722 smi_info->handlers->start_transaction(
723 smi_info->si_sm, msg, 3);
724 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
725 }
726 break;
727 }
728
729 case SI_DISABLE_INTERRUPTS2:
730 {
731 unsigned char msg[4];
732
733 /* We got the flags from the SMI, now handle them. */
734 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
735 if (msg[2] != 0) {
736 printk(KERN_WARNING
737 "ipmi_si: Could not disable interrupts"
738 ", failed set.\n");
739 }
740 smi_info->si_state = SI_NORMAL;
741 break;
742 }
1da177e4
LT		 743 }
744}
745
c305e3d3
CM		 746/*
747 * Called on timeouts and events. Timeouts should pass the elapsed
748 * time, interrupts should pass in zero. Must be called with
749 * si_lock held and interrupts disabled.
750 */
1da177e4
LT		 751static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
752 int time)
753{
754 enum si_sm_result si_sm_result;
755
756 restart:
c305e3d3
CM		 757 /*
758 * There used to be a loop here that waited a little while
759 * (around 25us) before giving up. That turned out to be
760 * pointless, the minimum delays I was seeing were in the 300us
761 * range, which is far too long to wait in an interrupt. So
762 * we just run until the state machine tells us something
763 * happened or it needs a delay.
764 */
1da177e4
LT		 765 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
766 time = 0;
767 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
1da177e4 768 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
1da177e4 769
c305e3d3 770 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
64959e2d 771 smi_inc_stat(smi_info, complete_transactions);
1da177e4
LT		 772
773 handle_transaction_done(smi_info);
774 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
c305e3d3 775 } else if (si_sm_result == SI_SM_HOSED) {
64959e2d 776 smi_inc_stat(smi_info, hosed_count);
1da177e4 777
c305e3d3
CM		 778 /*
779 * Do the before return_hosed_msg, because that
780 * releases the lock.
781 */
1da177e4
LT		 782 smi_info->si_state = SI_NORMAL;
783 if (smi_info->curr_msg != NULL) {
c305e3d3
CM		 784 /*
785 * If we were handling a user message, format
786 * a response to send to the upper layer to
787 * tell it about the error.
788 */
4d7cbac7 789 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
1da177e4
LT		 790 }
791 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
792 }
793
4ea18425
CM		 794 /*
795 * We prefer handling attn over new messages. But don't do
796 * this if there is not yet an upper layer to handle anything.
797 */
c305e3d3 798 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
1da177e4
LT		 799 unsigned char msg[2];
800
64959e2d 801 smi_inc_stat(smi_info, attentions);
1da177e4 802
c305e3d3
CM		 803 /*
804 * Got a attn, send down a get message flags to see
805 * what's causing it. It would be better to handle
806 * this in the upper layer, but due to the way
807 * interrupts work with the SMI, that's not really
808 * possible.
809 */
1da177e4
LT		 810 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
811 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
812
813 smi_info->handlers->start_transaction(
814 smi_info->si_sm, msg, 2);
815 smi_info->si_state = SI_GETTING_FLAGS;
816 goto restart;
817 }
818
819 /* If we are currently idle, try to start the next message. */
820 if (si_sm_result == SI_SM_IDLE) {
64959e2d 821 smi_inc_stat(smi_info, idles);
1da177e4
LT		 822
823 si_sm_result = start_next_msg(smi_info);
824 if (si_sm_result != SI_SM_IDLE)
825 goto restart;
c305e3d3 826 }
1da177e4
LT		 827
828 if ((si_sm_result == SI_SM_IDLE)
c305e3d3
CM		 829 && (atomic_read(&smi_info->req_events))) {
830 /*
831 * We are idle and the upper layer requested that I fetch
832 * events, so do so.
833 */
55162fb1 834 atomic_set(&smi_info->req_events, 0);
1da177e4 835
55162fb1
CM		 836 smi_info->curr_msg = ipmi_alloc_smi_msg();
837 if (!smi_info->curr_msg)
838 goto out;
1da177e4 839
55162fb1
CM		 840 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
841 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
842 smi_info->curr_msg->data_size = 2;
1da177e4
LT		 843
844 smi_info->handlers->start_transaction(
55162fb1
CM		 845 smi_info->si_sm,
846 smi_info->curr_msg->data,
847 smi_info->curr_msg->data_size);
848 smi_info->si_state = SI_GETTING_EVENTS;
1da177e4
LT		 849 goto restart;
850 }
55162fb1 851 out:
1da177e4
LT		 852 return si_sm_result;
853}
854
855static void sender(void *send_info,
856 struct ipmi_smi_msg *msg,
857 int priority)
858{
859 struct smi_info *smi_info = send_info;
860 enum si_sm_result result;
861 unsigned long flags;
862#ifdef DEBUG_TIMING
863 struct timeval t;
864#endif
865
b361e27b
CM		 866 if (atomic_read(&smi_info->stop_operation)) {
867 msg->rsp[0] = msg->data[0] | 4;
868 msg->rsp[1] = msg->data[1];
869 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
870 msg->rsp_size = 3;
871 deliver_recv_msg(smi_info, msg);
872 return;
873 }
874
1da177e4
LT		 875#ifdef DEBUG_TIMING
876 do_gettimeofday(&t);
877 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
878#endif
879
880 if (smi_info->run_to_completion) {
bda4c30a
CM		 881 /*
882 * If we are running to completion, then throw it in
883 * the list and run transactions until everything is
884 * clear. Priority doesn't matter here.
885 */
886
887 /*
888 * Run to completion means we are single-threaded, no
889 * need for locks.
890 */
1da177e4
LT		 891 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
892
1da177e4
LT		 893 result = smi_event_handler(smi_info, 0);
894 while (result != SI_SM_IDLE) {
895 udelay(SI_SHORT_TIMEOUT_USEC);
896 result = smi_event_handler(smi_info,
897 SI_SHORT_TIMEOUT_USEC);
898 }
1da177e4 899 return;
1da177e4 900 }
1da177e4 901
bda4c30a
CM		 902 spin_lock_irqsave(&smi_info->msg_lock, flags);
903 if (priority > 0)
904 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
905 else
906 list_add_tail(&msg->link, &smi_info->xmit_msgs);
907 spin_unlock_irqrestore(&smi_info->msg_lock, flags);
908
909 spin_lock_irqsave(&smi_info->si_lock, flags);
c305e3d3 910 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL)
1da177e4 911 start_next_msg(smi_info);
bda4c30a 912 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1da177e4
LT		 913}
914
915static void set_run_to_completion(void *send_info, int i_run_to_completion)
916{
917 struct smi_info *smi_info = send_info;
918 enum si_sm_result result;
1da177e4
LT		 919
920 smi_info->run_to_completion = i_run_to_completion;
921 if (i_run_to_completion) {
922 result = smi_event_handler(smi_info, 0);
923 while (result != SI_SM_IDLE) {
924 udelay(SI_SHORT_TIMEOUT_USEC);
925 result = smi_event_handler(smi_info,
926 SI_SHORT_TIMEOUT_USEC);
927 }
928 }
1da177e4
LT		 929}
930
ae74e823
MW		 931/*
932 * Use -1 in the nsec value of the busy waiting timespec to tell that
933 * we are spinning in kipmid looking for something and not delaying
934 * between checks
935 */
936static inline void ipmi_si_set_not_busy(struct timespec *ts)
937{
938 ts->tv_nsec = -1;
939}
940static inline int ipmi_si_is_busy(struct timespec *ts)
941{
942 return ts->tv_nsec != -1;
943}
944
945static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
946 const struct smi_info *smi_info,
947 struct timespec *busy_until)
948{
949 unsigned int max_busy_us = 0;
950
951 if (smi_info->intf_num < num_max_busy_us)
952 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
953 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
954 ipmi_si_set_not_busy(busy_until);
955 else if (!ipmi_si_is_busy(busy_until)) {
956 getnstimeofday(busy_until);
957 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
958 } else {
959 struct timespec now;
960 getnstimeofday(&now);
961 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
962 ipmi_si_set_not_busy(busy_until);
963 return 0;
964 }
965 }
966 return 1;
967}
968
969
970/*
971 * A busy-waiting loop for speeding up IPMI operation.
972 *
973 * Lousy hardware makes this hard. This is only enabled for systems
974 * that are not BT and do not have interrupts. It starts spinning
975 * when an operation is complete or until max_busy tells it to stop
976 * (if that is enabled). See the paragraph on kimid_max_busy_us in
977 * Documentation/IPMI.txt for details.
978 */
a9a2c44f
CM		 979static int ipmi_thread(void *data)
980{
981 struct smi_info *smi_info = data;
e9a705a0 982 unsigned long flags;
a9a2c44f 983 enum si_sm_result smi_result;
ae74e823 984 struct timespec busy_until;
a9a2c44f 985
ae74e823 986 ipmi_si_set_not_busy(&busy_until);
a9a2c44f 987 set_user_nice(current, 19);
e9a705a0 988 while (!kthread_should_stop()) {
ae74e823
MW		 989 int busy_wait;
990
a9a2c44f 991 spin_lock_irqsave(&(smi_info->si_lock), flags);
8a3628d5 992 smi_result = smi_event_handler(smi_info, 0);
a9a2c44f 993 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
ae74e823
MW		 994 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
995 &busy_until);
c305e3d3
CM		 996 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
997 ; /* do nothing */
ae74e823 998 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
33979734 999 schedule();
e9a705a0 1000 else
ae74e823 1001 schedule_timeout_interruptible(0);
a9a2c44f 1002 }
a9a2c44f
CM		 1003 return 0;
1004}
1005
1006
1da177e4
LT		 1007static void poll(void *send_info)
1008{
1009 struct smi_info *smi_info = send_info;
fcfa4724 1010 unsigned long flags;
1da177e4 1011
15c62e10
CM		 1012 /*
1013 * Make sure there is some delay in the poll loop so we can
1014 * drive time forward and timeout things.
1015 */
1016 udelay(10);
fcfa4724 1017 spin_lock_irqsave(&smi_info->si_lock, flags);
15c62e10 1018 smi_event_handler(smi_info, 10);
fcfa4724 1019 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1da177e4
LT		 1020}
1021
1022static void request_events(void *send_info)
1023{
1024 struct smi_info *smi_info = send_info;
1025
40112ae7
CM		 1026 if (atomic_read(&smi_info->stop_operation) ||
1027 !smi_info->has_event_buffer)
b361e27b
CM		 1028 return;
1029
1da177e4
LT		 1030 atomic_set(&smi_info->req_events, 1);
1031}
1032
0c8204b3 1033static int initialized;
1da177e4 1034
1da177e4
LT		 1035static void smi_timeout(unsigned long data)
1036{
1037 struct smi_info *smi_info = (struct smi_info *) data;
1038 enum si_sm_result smi_result;
1039 unsigned long flags;
1040 unsigned long jiffies_now;
c4edff1c 1041 long time_diff;
1da177e4
LT		 1042#ifdef DEBUG_TIMING
1043 struct timeval t;
1044#endif
1045
1da177e4
LT		 1046 spin_lock_irqsave(&(smi_info->si_lock), flags);
1047#ifdef DEBUG_TIMING
1048 do_gettimeofday(&t);
c305e3d3 1049 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 1050#endif
1051 jiffies_now = jiffies;
c4edff1c 1052 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1da177e4
LT		 1053 * SI_USEC_PER_JIFFY);
1054 smi_result = smi_event_handler(smi_info, time_diff);
1055
1056 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1057
1058 smi_info->last_timeout_jiffies = jiffies_now;
1059
b0defcdb 1060 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1da177e4
LT		 1061 /* Running with interrupts, only do long timeouts. */
1062 smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
64959e2d 1063 smi_inc_stat(smi_info, long_timeouts);
1da177e4
LT		 1064 goto do_add_timer;
1065 }
1066
c305e3d3
CM		 1067 /*
1068 * If the state machine asks for a short delay, then shorten
1069 * the timer timeout.
1070 */
1da177e4 1071 if (smi_result == SI_SM_CALL_WITH_DELAY) {
64959e2d 1072 smi_inc_stat(smi_info, short_timeouts);
1da177e4 1073 smi_info->si_timer.expires = jiffies + 1;
1da177e4 1074 } else {
64959e2d 1075 smi_inc_stat(smi_info, long_timeouts);
1da177e4 1076 smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES;
1da177e4
LT		 1077 }
1078
1079 do_add_timer:
1080 add_timer(&(smi_info->si_timer));
1081}
1082
7d12e780 1083static irqreturn_t si_irq_handler(int irq, void *data)
1da177e4
LT		 1084{
1085 struct smi_info *smi_info = data;
1086 unsigned long flags;
1087#ifdef DEBUG_TIMING
1088 struct timeval t;
1089#endif
1090
1091 spin_lock_irqsave(&(smi_info->si_lock), flags);
1092
64959e2d 1093 smi_inc_stat(smi_info, interrupts);
1da177e4 1094
1da177e4
LT		 1095#ifdef DEBUG_TIMING
1096 do_gettimeofday(&t);
c305e3d3 1097 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 1098#endif
1099 smi_event_handler(smi_info, 0);
1da177e4
LT		 1100 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1101 return IRQ_HANDLED;
1102}
1103
7d12e780 1104static irqreturn_t si_bt_irq_handler(int irq, void *data)
9dbf68f9
CM		 1105{
1106 struct smi_info *smi_info = data;
1107 /* We need to clear the IRQ flag for the BT interface. */
1108 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1109 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1110 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
7d12e780 1111 return si_irq_handler(irq, data);
9dbf68f9
CM		 1112}
1113
453823ba
CM		 1114static int smi_start_processing(void *send_info,
1115 ipmi_smi_t intf)
1116{
1117 struct smi_info *new_smi = send_info;
a51f4a81 1118 int enable = 0;
453823ba
CM		 1119
1120 new_smi->intf = intf;
1121
c45adc39
CM		 1122 /* Try to claim any interrupts. */
1123 if (new_smi->irq_setup)
1124 new_smi->irq_setup(new_smi);
1125
453823ba
CM		 1126 /* Set up the timer that drives the interface. */
1127 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1128 new_smi->last_timeout_jiffies = jiffies;
1129 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
1130
a51f4a81
CM		 1131 /*
1132 * Check if the user forcefully enabled the daemon.
1133 */
1134 if (new_smi->intf_num < num_force_kipmid)
1135 enable = force_kipmid[new_smi->intf_num];
df3fe8de
CM		 1136 /*
1137 * The BT interface is efficient enough to not need a thread,
1138 * and there is no need for a thread if we have interrupts.
1139 */
c305e3d3 1140 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
a51f4a81
CM		 1141 enable = 1;
1142
1143 if (enable) {
453823ba
CM		 1144 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1145 "kipmi%d", new_smi->intf_num);
1146 if (IS_ERR(new_smi->thread)) {
1147 printk(KERN_NOTICE "ipmi_si_intf: Could not start"
1148 " kernel thread due to error %ld, only using"
1149 " timers to drive the interface\n",
1150 PTR_ERR(new_smi->thread));
1151 new_smi->thread = NULL;
1152 }
1153 }
1154
1155 return 0;
1156}
9dbf68f9 1157
b9675136
CM		 1158static void set_maintenance_mode(void *send_info, int enable)
1159{
1160 struct smi_info *smi_info = send_info;
1161
1162 if (!enable)
1163 atomic_set(&smi_info->req_events, 0);
1164}
1165
c305e3d3 1166static struct ipmi_smi_handlers handlers = {
1da177e4 1167 .owner = THIS_MODULE,
453823ba 1168 .start_processing = smi_start_processing,
1da177e4
LT		 1169 .sender = sender,
1170 .request_events = request_events,
b9675136 1171 .set_maintenance_mode = set_maintenance_mode,
1da177e4
LT		 1172 .set_run_to_completion = set_run_to_completion,
1173 .poll = poll,
1174};
1175
c305e3d3
CM		 1176/*
1177 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1178 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1179 */
1da177e4 1180
b0defcdb 1181static LIST_HEAD(smi_infos);
d6dfd131 1182static DEFINE_MUTEX(smi_infos_lock);
b0defcdb 1183static int smi_num; /* Used to sequence the SMIs */
1da177e4 1184
1da177e4 1185#define DEFAULT_REGSPACING 1
dba9b4f6 1186#define DEFAULT_REGSIZE 1
1da177e4
LT		 1187
1188static int si_trydefaults = 1;
1189static char *si_type[SI_MAX_PARMS];
1190#define MAX_SI_TYPE_STR 30
1191static char si_type_str[MAX_SI_TYPE_STR];
1192static unsigned long addrs[SI_MAX_PARMS];
64a6f950 1193static unsigned int num_addrs;
1da177e4 1194static unsigned int ports[SI_MAX_PARMS];
64a6f950 1195static unsigned int num_ports;
1da177e4 1196static int irqs[SI_MAX_PARMS];
64a6f950 1197static unsigned int num_irqs;
1da177e4 1198static int regspacings[SI_MAX_PARMS];
64a6f950 1199static unsigned int num_regspacings;
1da177e4 1200static int regsizes[SI_MAX_PARMS];
64a6f950 1201static unsigned int num_regsizes;
1da177e4 1202static int regshifts[SI_MAX_PARMS];
64a6f950 1203static unsigned int num_regshifts;
1da177e4 1204static int slave_addrs[SI_MAX_PARMS];
64a6f950 1205static unsigned int num_slave_addrs;
1da177e4 1206
b361e27b
CM		 1207#define IPMI_IO_ADDR_SPACE 0
1208#define IPMI_MEM_ADDR_SPACE 1
1d5636cc 1209static char *addr_space_to_str[] = { "i/o", "mem" };
b361e27b
CM		 1210
1211static int hotmod_handler(const char *val, struct kernel_param *kp);
1212
1213module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1214MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1215 " Documentation/IPMI.txt in the kernel sources for the"
1216 " gory details.");
1da177e4
LT		 1217
1218module_param_named(trydefaults, si_trydefaults, bool, 0);
1219MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1220 " default scan of the KCS and SMIC interface at the standard"
1221 " address");
1222module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1223MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1224 " interface separated by commas. The types are 'kcs',"
1225 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1226 " the first interface to kcs and the second to bt");
64a6f950 1227module_param_array(addrs, ulong, &num_addrs, 0);
1da177e4
LT		 1228MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1229 " addresses separated by commas. Only use if an interface"
1230 " is in memory. Otherwise, set it to zero or leave"
1231 " it blank.");
64a6f950 1232module_param_array(ports, uint, &num_ports, 0);
1da177e4
LT		 1233MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1234 " addresses separated by commas. Only use if an interface"
1235 " is a port. Otherwise, set it to zero or leave"
1236 " it blank.");
1237module_param_array(irqs, int, &num_irqs, 0);
1238MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1239 " addresses separated by commas. Only use if an interface"
1240 " has an interrupt. Otherwise, set it to zero or leave"
1241 " it blank.");
1242module_param_array(regspacings, int, &num_regspacings, 0);
1243MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1244 " and each successive register used by the interface. For"
1245 " instance, if the start address is 0xca2 and the spacing"
1246 " is 2, then the second address is at 0xca4. Defaults"
1247 " to 1.");
1248module_param_array(regsizes, int, &num_regsizes, 0);
1249MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1250 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1251 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1252 " the 8-bit IPMI register has to be read from a larger"
1253 " register.");
1254module_param_array(regshifts, int, &num_regshifts, 0);
1255MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1256 " IPMI register, in bits. For instance, if the data"
1257 " is read from a 32-bit word and the IPMI data is in"
1258 " bit 8-15, then the shift would be 8");
1259module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1260MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1261 " the controller. Normally this is 0x20, but can be"
1262 " overridden by this parm. This is an array indexed"
1263 " by interface number.");
a51f4a81
CM		 1264module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1265MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1266 " disabled(0). Normally the IPMI driver auto-detects"
1267 " this, but the value may be overridden by this parm.");
b361e27b
CM		 1268module_param(unload_when_empty, int, 0);
1269MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1270 " specified or found, default is 1. Setting to 0"
1271 " is useful for hot add of devices using hotmod.");
ae74e823
MW		 1272module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1273MODULE_PARM_DESC(kipmid_max_busy_us,
1274 "Max time (in microseconds) to busy-wait for IPMI data before"
1275 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1276 " if kipmid is using up a lot of CPU time.");
1da177e4
LT		 1277
1278
b0defcdb 1279static void std_irq_cleanup(struct smi_info *info)
1da177e4 1280{
b0defcdb
CM		 1281 if (info->si_type == SI_BT)
1282 /* Disable the interrupt in the BT interface. */
1283 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1284 free_irq(info->irq, info);
1da177e4 1285}
1da177e4
LT		 1286
1287static int std_irq_setup(struct smi_info *info)
1288{
1289 int rv;
1290
b0defcdb 1291 if (!info->irq)
1da177e4
LT		 1292 return 0;
1293
9dbf68f9
CM		 1294 if (info->si_type == SI_BT) {
1295 rv = request_irq(info->irq,
1296 si_bt_irq_handler,
ee6cd5f8 1297 IRQF_SHARED | IRQF_DISABLED,
9dbf68f9
CM		 1298 DEVICE_NAME,
1299 info);
b0defcdb 1300 if (!rv)
9dbf68f9
CM		 1301 /* Enable the interrupt in the BT interface. */
1302 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1303 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1304 } else
1305 rv = request_irq(info->irq,
1306 si_irq_handler,
ee6cd5f8 1307 IRQF_SHARED | IRQF_DISABLED,
9dbf68f9
CM		 1308 DEVICE_NAME,
1309 info);
1da177e4
LT		 1310 if (rv) {
1311 printk(KERN_WARNING
1312 "ipmi_si: %s unable to claim interrupt %d,"
1313 " running polled\n",
1314 DEVICE_NAME, info->irq);
1315 info->irq = 0;
1316 } else {
b0defcdb 1317 info->irq_cleanup = std_irq_cleanup;
1da177e4
LT		 1318 printk(" Using irq %d\n", info->irq);
1319 }
1320
1321 return rv;
1322}
1323
1da177e4
LT		 1324static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1325{
b0defcdb 1326 unsigned int addr = io->addr_data;
1da177e4 1327
b0defcdb 1328 return inb(addr + (offset * io->regspacing));
1da177e4
LT		 1329}
1330
1331static void port_outb(struct si_sm_io *io, unsigned int offset,
1332 unsigned char b)
1333{
b0defcdb 1334 unsigned int addr = io->addr_data;
1da177e4 1335
b0defcdb 1336 outb(b, addr + (offset * io->regspacing));
1da177e4
LT		 1337}
1338
1339static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1340{
b0defcdb 1341 unsigned int addr = io->addr_data;
1da177e4 1342
b0defcdb 1343 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1da177e4
LT		 1344}
1345
1346static void port_outw(struct si_sm_io *io, unsigned int offset,
1347 unsigned char b)
1348{
b0defcdb 1349 unsigned int addr = io->addr_data;
1da177e4 1350
b0defcdb 1351 outw(b << io->regshift, addr + (offset * io->regspacing));
1da177e4
LT		 1352}
1353
1354static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1355{
b0defcdb 1356 unsigned int addr = io->addr_data;
1da177e4 1357
b0defcdb 1358 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1da177e4
LT		 1359}
1360
1361static void port_outl(struct si_sm_io *io, unsigned int offset,
1362 unsigned char b)
1363{
b0defcdb 1364 unsigned int addr = io->addr_data;
1da177e4 1365
b0defcdb 1366 outl(b << io->regshift, addr+(offset * io->regspacing));
1da177e4
LT		 1367}
1368
1369static void port_cleanup(struct smi_info *info)
1370{
b0defcdb 1371 unsigned int addr = info->io.addr_data;
d61a3ead 1372 int idx;
1da177e4 1373
b0defcdb 1374 if (addr) {
c305e3d3 1375 for (idx = 0; idx < info->io_size; idx++)
d61a3ead
CM		 1376 release_region(addr + idx * info->io.regspacing,
1377 info->io.regsize);
1da177e4 1378 }
1da177e4
LT		 1379}
1380
1381static int port_setup(struct smi_info *info)
1382{
b0defcdb 1383 unsigned int addr = info->io.addr_data;
d61a3ead 1384 int idx;
1da177e4 1385
b0defcdb 1386 if (!addr)
1da177e4
LT		 1387 return -ENODEV;
1388
1389 info->io_cleanup = port_cleanup;
1390
c305e3d3
CM		 1391 /*
1392 * Figure out the actual inb/inw/inl/etc routine to use based
1393 * upon the register size.
1394 */
1da177e4
LT		 1395 switch (info->io.regsize) {
1396 case 1:
1397 info->io.inputb = port_inb;
1398 info->io.outputb = port_outb;
1399 break;
1400 case 2:
1401 info->io.inputb = port_inw;
1402 info->io.outputb = port_outw;
1403 break;
1404 case 4:
1405 info->io.inputb = port_inl;
1406 info->io.outputb = port_outl;
1407 break;
1408 default:
c305e3d3 1409 printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n",
1da177e4
LT		 1410 info->io.regsize);
1411 return -EINVAL;
1412 }
1413
c305e3d3
CM		 1414 /*
1415 * Some BIOSes reserve disjoint I/O regions in their ACPI
d61a3ead
CM		 1416 * tables. This causes problems when trying to register the
1417 * entire I/O region. Therefore we must register each I/O
1418 * port separately.
1419 */
c305e3d3 1420 for (idx = 0; idx < info->io_size; idx++) {
d61a3ead
CM		 1421 if (request_region(addr + idx * info->io.regspacing,
1422 info->io.regsize, DEVICE_NAME) == NULL) {
1423 /* Undo allocations */
1424 while (idx--) {
1425 release_region(addr + idx * info->io.regspacing,
1426 info->io.regsize);
1427 }
1428 return -EIO;
1429 }
1430 }
1da177e4
LT		 1431 return 0;
1432}
1433
546cfdf4 1434static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1435{
1436 return readb((io->addr)+(offset * io->regspacing));
1437}
1438
546cfdf4 1439static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1440 unsigned char b)
1441{
1442 writeb(b, (io->addr)+(offset * io->regspacing));
1443}
1444
546cfdf4 1445static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1446{
1447 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1448 & 0xff;
1da177e4
LT		 1449}
1450
546cfdf4 1451static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1452 unsigned char b)
1453{
1454 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1455}
1456
546cfdf4 1457static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1458{
1459 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1460 & 0xff;
1da177e4
LT		 1461}
1462
546cfdf4 1463static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1464 unsigned char b)
1465{
1466 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1467}
1468
1469#ifdef readq
1470static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1471{
1472 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1473 & 0xff;
1da177e4
LT		 1474}
1475
1476static void mem_outq(struct si_sm_io *io, unsigned int offset,
1477 unsigned char b)
1478{
1479 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1480}
1481#endif
1482
1483static void mem_cleanup(struct smi_info *info)
1484{
b0defcdb 1485 unsigned long addr = info->io.addr_data;
1da177e4
LT		 1486 int mapsize;
1487
1488 if (info->io.addr) {
1489 iounmap(info->io.addr);
1490
1491 mapsize = ((info->io_size * info->io.regspacing)
1492 - (info->io.regspacing - info->io.regsize));
1493
b0defcdb 1494 release_mem_region(addr, mapsize);
1da177e4 1495 }
1da177e4
LT		 1496}
1497
1498static int mem_setup(struct smi_info *info)
1499{
b0defcdb 1500 unsigned long addr = info->io.addr_data;
1da177e4
LT		 1501 int mapsize;
1502
b0defcdb 1503 if (!addr)
1da177e4
LT		 1504 return -ENODEV;
1505
1506 info->io_cleanup = mem_cleanup;
1507
c305e3d3
CM		 1508 /*
1509 * Figure out the actual readb/readw/readl/etc routine to use based
1510 * upon the register size.
1511 */
1da177e4
LT		 1512 switch (info->io.regsize) {
1513 case 1:
546cfdf4
AD		 1514 info->io.inputb = intf_mem_inb;
1515 info->io.outputb = intf_mem_outb;
1da177e4
LT		 1516 break;
1517 case 2:
546cfdf4
AD		 1518 info->io.inputb = intf_mem_inw;
1519 info->io.outputb = intf_mem_outw;
1da177e4
LT		 1520 break;
1521 case 4:
546cfdf4
AD		 1522 info->io.inputb = intf_mem_inl;
1523 info->io.outputb = intf_mem_outl;
1da177e4
LT		 1524 break;
1525#ifdef readq
1526 case 8:
1527 info->io.inputb = mem_inq;
1528 info->io.outputb = mem_outq;
1529 break;
1530#endif
1531 default:
c305e3d3 1532 printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n",
1da177e4
LT		 1533 info->io.regsize);
1534 return -EINVAL;
1535 }
1536
c305e3d3
CM		 1537 /*
1538 * Calculate the total amount of memory to claim. This is an
1da177e4
LT		 1539 * unusual looking calculation, but it avoids claiming any
1540 * more memory than it has to. It will claim everything
1541 * between the first address to the end of the last full
c305e3d3
CM		 1542 * register.
1543 */
1da177e4
LT		 1544 mapsize = ((info->io_size * info->io.regspacing)
1545 - (info->io.regspacing - info->io.regsize));
1546
b0defcdb 1547 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1da177e4
LT		 1548 return -EIO;
1549
b0defcdb 1550 info->io.addr = ioremap(addr, mapsize);
1da177e4 1551 if (info->io.addr == NULL) {
b0defcdb 1552 release_mem_region(addr, mapsize);
1da177e4
LT		 1553 return -EIO;
1554 }
1555 return 0;
1556}
1557
b361e27b
CM		 1558/*
1559 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1560 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1561 * Options are:
1562 * rsp=<regspacing>
1563 * rsi=<regsize>
1564 * rsh=<regshift>
1565 * irq=<irq>
1566 * ipmb=<ipmb addr>
1567 */
1568enum hotmod_op { HM_ADD, HM_REMOVE };
1569struct hotmod_vals {
1570 char *name;
1571 int val;
1572};
1573static struct hotmod_vals hotmod_ops[] = {
1574 { "add", HM_ADD },
1575 { "remove", HM_REMOVE },
1576 { NULL }
1577};
1578static struct hotmod_vals hotmod_si[] = {
1579 { "kcs", SI_KCS },
1580 { "smic", SI_SMIC },
1581 { "bt", SI_BT },
1582 { NULL }
1583};
1584static struct hotmod_vals hotmod_as[] = {
1585 { "mem", IPMI_MEM_ADDR_SPACE },
1586 { "i/o", IPMI_IO_ADDR_SPACE },
1587 { NULL }
1588};
1d5636cc 1589
b361e27b
CM		 1590static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1591{
1592 char *s;
1593 int i;
1594
1595 s = strchr(*curr, ',');
1596 if (!s) {
1597 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1598 return -EINVAL;
1599 }
1600 *s = '\0';
1601 s++;
1602 for (i = 0; hotmod_ops[i].name; i++) {
1d5636cc 1603 if (strcmp(*curr, v[i].name) == 0) {
b361e27b
CM		 1604 *val = v[i].val;
1605 *curr = s;
1606 return 0;
1607 }
1608 }
1609
1610 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1611 return -EINVAL;
1612}
1613
1d5636cc
CM		 1614static int check_hotmod_int_op(const char *curr, const char *option,
1615 const char *name, int *val)
1616{
1617 char *n;
1618
1619 if (strcmp(curr, name) == 0) {
1620 if (!option) {
1621 printk(KERN_WARNING PFX
1622 "No option given for '%s'\n",
1623 curr);
1624 return -EINVAL;
1625 }
1626 *val = simple_strtoul(option, &n, 0);
1627 if ((*n != '\0') || (*option == '\0')) {
1628 printk(KERN_WARNING PFX
1629 "Bad option given for '%s'\n",
1630 curr);
1631 return -EINVAL;
1632 }
1633 return 1;
1634 }
1635 return 0;
1636}
1637
b361e27b
CM		 1638static int hotmod_handler(const char *val, struct kernel_param *kp)
1639{
1640 char *str = kstrdup(val, GFP_KERNEL);
1d5636cc 1641 int rv;
b361e27b
CM		 1642 char *next, *curr, *s, *n, *o;
1643 enum hotmod_op op;
1644 enum si_type si_type;
1645 int addr_space;
1646 unsigned long addr;
1647 int regspacing;
1648 int regsize;
1649 int regshift;
1650 int irq;
1651 int ipmb;
1652 int ival;
1d5636cc 1653 int len;
b361e27b
CM		 1654 struct smi_info *info;
1655
1656 if (!str)
1657 return -ENOMEM;
1658
1659 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1d5636cc
CM		 1660 len = strlen(str);
1661 ival = len - 1;
b361e27b
CM		 1662 while ((ival >= 0) && isspace(str[ival])) {
1663 str[ival] = '\0';
1664 ival--;
1665 }
1666
1667 for (curr = str; curr; curr = next) {
1668 regspacing = 1;
1669 regsize = 1;
1670 regshift = 0;
1671 irq = 0;
1672 ipmb = 0x20;
1673
1674 next = strchr(curr, ':');
1675 if (next) {
1676 *next = '\0';
1677 next++;
1678 }
1679
1680 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1681 if (rv)
1682 break;
1683 op = ival;
1684
1685 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1686 if (rv)
1687 break;
1688 si_type = ival;
1689
1690 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1691 if (rv)
1692 break;
1693
1694 s = strchr(curr, ',');
1695 if (s) {
1696 *s = '\0';
1697 s++;
1698 }
1699 addr = simple_strtoul(curr, &n, 0);
1700 if ((*n != '\0') || (*curr == '\0')) {
1701 printk(KERN_WARNING PFX "Invalid hotmod address"
1702 " '%s'\n", curr);
1703 break;
1704 }
1705
1706 while (s) {
1707 curr = s;
1708 s = strchr(curr, ',');
1709 if (s) {
1710 *s = '\0';
1711 s++;
1712 }
1713 o = strchr(curr, '=');
1714 if (o) {
1715 *o = '\0';
1716 o++;
1717 }
1d5636cc
CM		 1718 rv = check_hotmod_int_op(curr, o, "rsp", &regspacing);
1719 if (rv < 0)
b361e27b 1720 goto out;
1d5636cc
CM		 1721 else if (rv)
1722 continue;
1723 rv = check_hotmod_int_op(curr, o, "rsi", &regsize);
1724 if (rv < 0)
1725 goto out;
1726 else if (rv)
1727 continue;
1728 rv = check_hotmod_int_op(curr, o, "rsh", &regshift);
1729 if (rv < 0)
1730 goto out;
1731 else if (rv)
1732 continue;
1733 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1734 if (rv < 0)
1735 goto out;
1736 else if (rv)
1737 continue;
1738 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1739 if (rv < 0)
1740 goto out;
1741 else if (rv)
1742 continue;
1743
1744 rv = -EINVAL;
1745 printk(KERN_WARNING PFX
1746 "Invalid hotmod option '%s'\n",
1747 curr);
1748 goto out;
b361e27b
CM		 1749 }
1750
1751 if (op == HM_ADD) {
1752 info = kzalloc(sizeof(*info), GFP_KERNEL);
1753 if (!info) {
1754 rv = -ENOMEM;
1755 goto out;
1756 }
1757
1758 info->addr_source = "hotmod";
1759 info->si_type = si_type;
1760 info->io.addr_data = addr;
1761 info->io.addr_type = addr_space;
1762 if (addr_space == IPMI_MEM_ADDR_SPACE)
1763 info->io_setup = mem_setup;
1764 else
1765 info->io_setup = port_setup;
1766
1767 info->io.addr = NULL;
1768 info->io.regspacing = regspacing;
1769 if (!info->io.regspacing)
1770 info->io.regspacing = DEFAULT_REGSPACING;
1771 info->io.regsize = regsize;
1772 if (!info->io.regsize)
1773 info->io.regsize = DEFAULT_REGSPACING;
1774 info->io.regshift = regshift;
1775 info->irq = irq;
1776 if (info->irq)
1777 info->irq_setup = std_irq_setup;
1778 info->slave_addr = ipmb;
1779
1780 try_smi_init(info);
1781 } else {
1782 /* remove */
1783 struct smi_info *e, *tmp_e;
1784
1785 mutex_lock(&smi_infos_lock);
1786 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1787 if (e->io.addr_type != addr_space)
1788 continue;
1789 if (e->si_type != si_type)
1790 continue;
1791 if (e->io.addr_data == addr)
1792 cleanup_one_si(e);
1793 }
1794 mutex_unlock(&smi_infos_lock);
1795 }
1796 }
1d5636cc 1797 rv = len;
b361e27b
CM		 1798 out:
1799 kfree(str);
1800 return rv;
1801}
b0defcdb
CM		 1802
1803static __devinit void hardcode_find_bmc(void)
1da177e4 1804{
b0defcdb 1805 int i;
1da177e4
LT		 1806 struct smi_info *info;
1807
b0defcdb
CM		 1808 for (i = 0; i < SI_MAX_PARMS; i++) {
1809 if (!ports[i] && !addrs[i])
1810 continue;
1da177e4 1811
b0defcdb
CM		 1812 info = kzalloc(sizeof(*info), GFP_KERNEL);
1813 if (!info)
1814 return;
1da177e4 1815
b0defcdb 1816 info->addr_source = "hardcoded";
1da177e4 1817
1d5636cc 1818 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
b0defcdb 1819 info->si_type = SI_KCS;
1d5636cc 1820 } else if (strcmp(si_type[i], "smic") == 0) {
b0defcdb 1821 info->si_type = SI_SMIC;
1d5636cc 1822 } else if (strcmp(si_type[i], "bt") == 0) {
b0defcdb
CM		 1823 info->si_type = SI_BT;
1824 } else {
1825 printk(KERN_WARNING
1826 "ipmi_si: Interface type specified "
1827 "for interface %d, was invalid: %s\n",
1828 i, si_type[i]);
1829 kfree(info);
1830 continue;
1831 }
1da177e4 1832
b0defcdb
CM		 1833 if (ports[i]) {
1834 /* An I/O port */
1835 info->io_setup = port_setup;
1836 info->io.addr_data = ports[i];
1837 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1838 } else if (addrs[i]) {
1839 /* A memory port */
1840 info->io_setup = mem_setup;
1841 info->io.addr_data = addrs[i];
1842 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1843 } else {
1844 printk(KERN_WARNING
1845 "ipmi_si: Interface type specified "
1846 "for interface %d, "
1847 "but port and address were not set or "
1848 "set to zero.\n", i);
1849 kfree(info);
1850 continue;
1851 }
1da177e4 1852
b0defcdb
CM		 1853 info->io.addr = NULL;
1854 info->io.regspacing = regspacings[i];
1855 if (!info->io.regspacing)
1856 info->io.regspacing = DEFAULT_REGSPACING;
1857 info->io.regsize = regsizes[i];
1858 if (!info->io.regsize)
1859 info->io.regsize = DEFAULT_REGSPACING;
1860 info->io.regshift = regshifts[i];
1861 info->irq = irqs[i];
1862 if (info->irq)
1863 info->irq_setup = std_irq_setup;
1da177e4 1864
b0defcdb
CM		 1865 try_smi_init(info);
1866 }
1867}
1da177e4 1868
8466361a 1869#ifdef CONFIG_ACPI
1da177e4
LT		 1870
1871#include <linux/acpi.h>
1872
c305e3d3
CM		 1873/*
1874 * Once we get an ACPI failure, we don't try any more, because we go
1875 * through the tables sequentially. Once we don't find a table, there
1876 * are no more.
1877 */
0c8204b3 1878static int acpi_failure;
1da177e4
LT		 1879
1880/* For GPE-type interrupts. */
1881static u32 ipmi_acpi_gpe(void *context)
1882{
1883 struct smi_info *smi_info = context;
1884 unsigned long flags;
1885#ifdef DEBUG_TIMING
1886 struct timeval t;
1887#endif
1888
1889 spin_lock_irqsave(&(smi_info->si_lock), flags);
1890
64959e2d 1891 smi_inc_stat(smi_info, interrupts);
1da177e4 1892
1da177e4
LT		 1893#ifdef DEBUG_TIMING
1894 do_gettimeofday(&t);
1895 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1896#endif
1897 smi_event_handler(smi_info, 0);
1da177e4
LT		 1898 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1899
1900 return ACPI_INTERRUPT_HANDLED;
1901}
1902
b0defcdb
CM		 1903static void acpi_gpe_irq_cleanup(struct smi_info *info)
1904{
1905 if (!info->irq)
1906 return;
1907
1908 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1909}
1910
1da177e4
LT		 1911static int acpi_gpe_irq_setup(struct smi_info *info)
1912{
1913 acpi_status status;
1914
b0defcdb 1915 if (!info->irq)
1da177e4
LT		 1916 return 0;
1917
1918 /* FIXME - is level triggered right? */
1919 status = acpi_install_gpe_handler(NULL,
1920 info->irq,
1921 ACPI_GPE_LEVEL_TRIGGERED,
1922 &ipmi_acpi_gpe,
1923 info);
1924 if (status != AE_OK) {
1925 printk(KERN_WARNING
1926 "ipmi_si: %s unable to claim ACPI GPE %d,"
1927 " running polled\n",
1928 DEVICE_NAME, info->irq);
1929 info->irq = 0;
1930 return -EINVAL;
1931 } else {
b0defcdb 1932 info->irq_cleanup = acpi_gpe_irq_cleanup;
1da177e4
LT		 1933 printk(" Using ACPI GPE %d\n", info->irq);
1934 return 0;
1935 }
1936}
1937
1da177e4
LT		 1938/*
1939 * Defined at
c305e3d3
CM		 1940 * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/
1941 * Docs/TechPapers/IA64/hpspmi.pdf
1da177e4
LT		 1942 */
1943struct SPMITable {
1944 s8 Signature[4];
1945 u32 Length;
1946 u8 Revision;
1947 u8 Checksum;
1948 s8 OEMID[6];
1949 s8 OEMTableID[8];
1950 s8 OEMRevision[4];
1951 s8 CreatorID[4];
1952 s8 CreatorRevision[4];
1953 u8 InterfaceType;
1954 u8 IPMIlegacy;
1955 s16 SpecificationRevision;
1956
1957 /*
1958 * Bit 0 - SCI interrupt supported
1959 * Bit 1 - I/O APIC/SAPIC
1960 */
1961 u8 InterruptType;
1962
c305e3d3
CM		 1963 /*
1964 * If bit 0 of InterruptType is set, then this is the SCI
1965 * interrupt in the GPEx_STS register.
1966 */
1da177e4
LT		 1967 u8 GPE;
1968
1969 s16 Reserved;
1970
c305e3d3
CM		 1971 /*
1972 * If bit 1 of InterruptType is set, then this is the I/O
1973 * APIC/SAPIC interrupt.
1974 */
1da177e4
LT		 1975 u32 GlobalSystemInterrupt;
1976
1977 /* The actual register address. */
1978 struct acpi_generic_address addr;
1979
1980 u8 UID[4];
1981
1982 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
1983};
1984
18a3e0bf 1985static __devinit int try_init_spmi(struct SPMITable *spmi)
1da177e4
LT		 1986{
1987 struct smi_info *info;
1da177e4
LT		 1988 u8 addr_space;
1989
1da177e4
LT		 1990 if (spmi->IPMIlegacy != 1) {
1991 printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy);
c305e3d3 1992 return -ENODEV;
1da177e4
LT		 1993 }
1994
15a58ed1 1995 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
1da177e4
LT		 1996 addr_space = IPMI_MEM_ADDR_SPACE;
1997 else
1998 addr_space = IPMI_IO_ADDR_SPACE;
b0defcdb
CM		 1999
2000 info = kzalloc(sizeof(*info), GFP_KERNEL);
2001 if (!info) {
2002 printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n");
2003 return -ENOMEM;
2004 }
2005
18a3e0bf 2006 info->addr_source = "SPMI";
1da177e4 2007
1da177e4 2008 /* Figure out the interface type. */
c305e3d3 2009 switch (spmi->InterfaceType) {
1da177e4 2010 case 1: /* KCS */
b0defcdb 2011 info->si_type = SI_KCS;
1da177e4 2012 break;
1da177e4 2013 case 2: /* SMIC */
b0defcdb 2014 info->si_type = SI_SMIC;
1da177e4 2015 break;
1da177e4 2016 case 3: /* BT */
b0defcdb 2017 info->si_type = SI_BT;
1da177e4 2018 break;
1da177e4
LT		 2019 default:
2020 printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n",
2021 spmi->InterfaceType);
b0defcdb 2022 kfree(info);
1da177e4
LT		 2023 return -EIO;
2024 }
2025
1da177e4
LT		 2026 if (spmi->InterruptType & 1) {
2027 /* We've got a GPE interrupt. */
2028 info->irq = spmi->GPE;
2029 info->irq_setup = acpi_gpe_irq_setup;
1da177e4
LT		 2030 } else if (spmi->InterruptType & 2) {
2031 /* We've got an APIC/SAPIC interrupt. */
2032 info->irq = spmi->GlobalSystemInterrupt;
2033 info->irq_setup = std_irq_setup;
1da177e4
LT		 2034 } else {
2035 /* Use the default interrupt setting. */
2036 info->irq = 0;
2037 info->irq_setup = NULL;
2038 }
2039
15a58ed1 2040 if (spmi->addr.bit_width) {
35bc37a0 2041 /* A (hopefully) properly formed register bit width. */
15a58ed1 2042 info->io.regspacing = spmi->addr.bit_width / 8;
35bc37a0 2043 } else {
35bc37a0
CM		 2044 info->io.regspacing = DEFAULT_REGSPACING;
2045 }
b0defcdb 2046 info->io.regsize = info->io.regspacing;
15a58ed1 2047 info->io.regshift = spmi->addr.bit_offset;
1da177e4 2048
15a58ed1 2049 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
1da177e4 2050 info->io_setup = mem_setup;
8fe1425a 2051 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
15a58ed1 2052 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
1da177e4 2053 info->io_setup = port_setup;
8fe1425a 2054 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1da177e4
LT		 2055 } else {
2056 kfree(info);
c305e3d3
CM		 2057 printk(KERN_WARNING
2058 "ipmi_si: Unknown ACPI I/O Address type\n");
1da177e4
LT		 2059 return -EIO;
2060 }
b0defcdb 2061 info->io.addr_data = spmi->addr.address;
1da177e4 2062
b0defcdb 2063 try_smi_init(info);
1da177e4 2064
1da177e4
LT		 2065 return 0;
2066}
b0defcdb 2067
18a3e0bf 2068static __devinit void spmi_find_bmc(void)
b0defcdb
CM		 2069{
2070 acpi_status status;
2071 struct SPMITable *spmi;
2072 int i;
2073
2074 if (acpi_disabled)
2075 return;
2076
2077 if (acpi_failure)
2078 return;
2079
2080 for (i = 0; ; i++) {
15a58ed1
AS		 2081 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2082 (struct acpi_table_header **)&spmi);
b0defcdb
CM		 2083 if (status != AE_OK)
2084 return;
2085
18a3e0bf 2086 try_init_spmi(spmi);
b0defcdb
CM		 2087 }
2088}
9e368fa0
BH		 2089
2090static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
2091 const struct pnp_device_id *dev_id)
2092{
2093 struct acpi_device *acpi_dev;
2094 struct smi_info *info;
2095 acpi_handle handle;
2096 acpi_status status;
2097 unsigned long long tmp;
2098
2099 acpi_dev = pnp_acpi_device(dev);
2100 if (!acpi_dev)
2101 return -ENODEV;
2102
2103 info = kzalloc(sizeof(*info), GFP_KERNEL);
2104 if (!info)
2105 return -ENOMEM;
2106
2107 info->addr_source = "ACPI";
2108
2109 handle = acpi_dev->handle;
2110
2111 /* _IFT tells us the interface type: KCS, BT, etc */
2112 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2113 if (ACPI_FAILURE(status))
2114 goto err_free;
2115
2116 switch (tmp) {
2117 case 1:
2118 info->si_type = SI_KCS;
2119 break;
2120 case 2:
2121 info->si_type = SI_SMIC;
2122 break;
2123 case 3:
2124 info->si_type = SI_BT;
2125 break;
2126 default:
2127 dev_info(&dev->dev, "unknown interface type %lld\n", tmp);
2128 goto err_free;
2129 }
2130
2131 if (pnp_port_valid(dev, 0)) {
2132 info->io_setup = port_setup;
2133 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2134 info->io.addr_data = pnp_port_start(dev, 0);
2135 } else if (pnp_mem_valid(dev, 0)) {
2136 info->io_setup = mem_setup;
2137 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2138 info->io.addr_data = pnp_mem_start(dev, 0);
2139 } else {
2140 dev_err(&dev->dev, "no I/O or memory address\n");
2141 goto err_free;
2142 }
2143
2144 info->io.regspacing = DEFAULT_REGSPACING;
2145 info->io.regsize = DEFAULT_REGSPACING;
2146 info->io.regshift = 0;
2147
2148 /* If _GPE exists, use it; otherwise use standard interrupts */
2149 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2150 if (ACPI_SUCCESS(status)) {
2151 info->irq = tmp;
2152 info->irq_setup = acpi_gpe_irq_setup;
2153 } else if (pnp_irq_valid(dev, 0)) {
2154 info->irq = pnp_irq(dev, 0);
2155 info->irq_setup = std_irq_setup;
2156 }
2157
2158 info->dev = &acpi_dev->dev;
2159 pnp_set_drvdata(dev, info);
2160
2161 return try_smi_init(info);
2162
2163err_free:
2164 kfree(info);
2165 return -EINVAL;
2166}
2167
2168static void __devexit ipmi_pnp_remove(struct pnp_dev *dev)
2169{
2170 struct smi_info *info = pnp_get_drvdata(dev);
2171
2172 cleanup_one_si(info);
2173}
2174
2175static const struct pnp_device_id pnp_dev_table[] = {
2176 {"IPI0001", 0},
2177 {"", 0},
2178};
2179
2180static struct pnp_driver ipmi_pnp_driver = {
2181 .name = DEVICE_NAME,
2182 .probe = ipmi_pnp_probe,
2183 .remove = __devexit_p(ipmi_pnp_remove),
2184 .id_table = pnp_dev_table,
2185};
1da177e4
LT		 2186#endif
2187
a9fad4cc 2188#ifdef CONFIG_DMI
c305e3d3 2189struct dmi_ipmi_data {
1da177e4
LT		 2190 u8 type;
2191 u8 addr_space;
2192 unsigned long base_addr;
2193 u8 irq;
2194 u8 offset;
2195 u8 slave_addr;
b0defcdb 2196};
1da177e4 2197
1855256c 2198static int __devinit decode_dmi(const struct dmi_header *dm,
b0defcdb 2199 struct dmi_ipmi_data *dmi)
1da177e4 2200{
1855256c 2201 const u8 *data = (const u8 *)dm;
1da177e4
LT		 2202 unsigned long base_addr;
2203 u8 reg_spacing;
b224cd3a 2204 u8 len = dm->length;
1da177e4 2205
b0defcdb 2206 dmi->type = data[4];
1da177e4
LT		 2207
2208 memcpy(&base_addr, data+8, sizeof(unsigned long));
2209 if (len >= 0x11) {
2210 if (base_addr & 1) {
2211 /* I/O */
2212 base_addr &= 0xFFFE;
b0defcdb 2213 dmi->addr_space = IPMI_IO_ADDR_SPACE;
c305e3d3 2214 } else
1da177e4 2215 /* Memory */
b0defcdb 2216 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
c305e3d3 2217
1da177e4
LT		 2218 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2219 is odd. */
b0defcdb 2220 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
1da177e4 2221
b0defcdb 2222 dmi->irq = data[0x11];
1da177e4
LT		 2223
2224 /* The top two bits of byte 0x10 hold the register spacing. */
b224cd3a 2225 reg_spacing = (data[0x10] & 0xC0) >> 6;
c305e3d3 2226 switch (reg_spacing) {
1da177e4 2227 case 0x00: /* Byte boundaries */
b0defcdb 2228 dmi->offset = 1;
1da177e4
LT		 2229 break;
2230 case 0x01: /* 32-bit boundaries */
b0defcdb 2231 dmi->offset = 4;
1da177e4
LT		 2232 break;
2233 case 0x02: /* 16-byte boundaries */
b0defcdb 2234 dmi->offset = 16;
1da177e4
LT		 2235 break;
2236 default:
2237 /* Some other interface, just ignore it. */
2238 return -EIO;
2239 }
2240 } else {
2241 /* Old DMI spec. */
c305e3d3
CM		 2242 /*
2243 * Note that technically, the lower bit of the base
92068801
CM		 2244 * address should be 1 if the address is I/O and 0 if
2245 * the address is in memory. So many systems get that
2246 * wrong (and all that I have seen are I/O) so we just
2247 * ignore that bit and assume I/O. Systems that use
c305e3d3
CM		 2248 * memory should use the newer spec, anyway.
2249 */
b0defcdb
CM		 2250 dmi->base_addr = base_addr & 0xfffe;
2251 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2252 dmi->offset = 1;
1da177e4
LT		 2253 }
2254
b0defcdb 2255 dmi->slave_addr = data[6];
1da177e4 2256
b0defcdb 2257 return 0;
1da177e4
LT		 2258}
2259
b0defcdb 2260static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
1da177e4 2261{
b0defcdb 2262 struct smi_info *info;
1da177e4 2263
b0defcdb
CM		 2264 info = kzalloc(sizeof(*info), GFP_KERNEL);
2265 if (!info) {
2266 printk(KERN_ERR
2267 "ipmi_si: Could not allocate SI data\n");
2268 return;
1da177e4 2269 }
1da177e4 2270
b0defcdb 2271 info->addr_source = "SMBIOS";
1da177e4 2272
e8b33617 2273 switch (ipmi_data->type) {
b0defcdb
CM		 2274 case 0x01: /* KCS */
2275 info->si_type = SI_KCS;
2276 break;
2277 case 0x02: /* SMIC */
2278 info->si_type = SI_SMIC;
2279 break;
2280 case 0x03: /* BT */
2281 info->si_type = SI_BT;
2282 break;
2283 default:
80cd6920 2284 kfree(info);
b0defcdb 2285 return;
1da177e4 2286 }
1da177e4 2287
b0defcdb
CM		 2288 switch (ipmi_data->addr_space) {
2289 case IPMI_MEM_ADDR_SPACE:
1da177e4 2290 info->io_setup = mem_setup;
b0defcdb
CM		 2291 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2292 break;
2293
2294 case IPMI_IO_ADDR_SPACE:
1da177e4 2295 info->io_setup = port_setup;
b0defcdb
CM		 2296 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2297 break;
2298
2299 default:
1da177e4 2300 kfree(info);
b0defcdb
CM		 2301 printk(KERN_WARNING
2302 "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n",
2303 ipmi_data->addr_space);
2304 return;
1da177e4 2305 }
b0defcdb 2306 info->io.addr_data = ipmi_data->base_addr;
1da177e4 2307
b0defcdb
CM		 2308 info->io.regspacing = ipmi_data->offset;
2309 if (!info->io.regspacing)
1da177e4
LT		 2310 info->io.regspacing = DEFAULT_REGSPACING;
2311 info->io.regsize = DEFAULT_REGSPACING;
b0defcdb 2312 info->io.regshift = 0;
1da177e4
LT		 2313
2314 info->slave_addr = ipmi_data->slave_addr;
2315
b0defcdb
CM		 2316 info->irq = ipmi_data->irq;
2317 if (info->irq)
2318 info->irq_setup = std_irq_setup;
1da177e4 2319
b0defcdb
CM		 2320 try_smi_init(info);
2321}
1da177e4 2322
b0defcdb
CM		 2323static void __devinit dmi_find_bmc(void)
2324{
1855256c 2325 const struct dmi_device *dev = NULL;
b0defcdb
CM		 2326 struct dmi_ipmi_data data;
2327 int rv;
2328
2329 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
397f4ebf 2330 memset(&data, 0, sizeof(data));
1855256c
JG		 2331 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2332 &data);
b0defcdb
CM		 2333 if (!rv)
2334 try_init_dmi(&data);
2335 }
1da177e4 2336}
a9fad4cc 2337#endif /* CONFIG_DMI */
1da177e4
LT		 2338
2339#ifdef CONFIG_PCI
2340
b0defcdb
CM		 2341#define PCI_ERMC_CLASSCODE 0x0C0700
2342#define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2343#define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2344#define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2345#define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2346#define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2347
1da177e4
LT		 2348#define PCI_HP_VENDOR_ID 0x103C
2349#define PCI_MMC_DEVICE_ID 0x121A
2350#define PCI_MMC_ADDR_CW 0x10
2351
b0defcdb
CM		 2352static void ipmi_pci_cleanup(struct smi_info *info)
2353{
2354 struct pci_dev *pdev = info->addr_source_data;
2355
2356 pci_disable_device(pdev);
2357}
1da177e4 2358
b0defcdb
CM		 2359static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
2360 const struct pci_device_id *ent)
1da177e4 2361{
b0defcdb
CM		 2362 int rv;
2363 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2364 struct smi_info *info;
1da177e4 2365
b0defcdb
CM		 2366 info = kzalloc(sizeof(*info), GFP_KERNEL);
2367 if (!info)
1cd441f9 2368 return -ENOMEM;
1da177e4 2369
b0defcdb 2370 info->addr_source = "PCI";
1da177e4 2371
b0defcdb
CM		 2372 switch (class_type) {
2373 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2374 info->si_type = SI_SMIC;
2375 break;
1da177e4 2376
b0defcdb
CM		 2377 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2378 info->si_type = SI_KCS;
2379 break;
2380
2381 case PCI_ERMC_CLASSCODE_TYPE_BT:
2382 info->si_type = SI_BT;
2383 break;
2384
2385 default:
2386 kfree(info);
2387 printk(KERN_INFO "ipmi_si: %s: Unknown IPMI type: %d\n",
2388 pci_name(pdev), class_type);
1cd441f9 2389 return -ENOMEM;
1da177e4
LT		 2390 }
2391
b0defcdb
CM		 2392 rv = pci_enable_device(pdev);
2393 if (rv) {
2394 printk(KERN_ERR "ipmi_si: %s: couldn't enable PCI device\n",
2395 pci_name(pdev));
2396 kfree(info);
2397 return rv;
1da177e4
LT		 2398 }
2399
b0defcdb
CM		 2400 info->addr_source_cleanup = ipmi_pci_cleanup;
2401 info->addr_source_data = pdev;
1da177e4 2402
b0defcdb
CM		 2403 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2404 info->io_setup = port_setup;
2405 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2406 } else {
2407 info->io_setup = mem_setup;
2408 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1da177e4 2409 }
b0defcdb 2410 info->io.addr_data = pci_resource_start(pdev, 0);
1da177e4 2411
b0defcdb 2412 info->io.regspacing = DEFAULT_REGSPACING;
1da177e4 2413 info->io.regsize = DEFAULT_REGSPACING;
b0defcdb 2414 info->io.regshift = 0;
1da177e4 2415
b0defcdb
CM		 2416 info->irq = pdev->irq;
2417 if (info->irq)
2418 info->irq_setup = std_irq_setup;
1da177e4 2419
50c812b2 2420 info->dev = &pdev->dev;
fca3b747 2421 pci_set_drvdata(pdev, info);
50c812b2 2422
b0defcdb
CM		 2423 return try_smi_init(info);
2424}
1da177e4 2425
b0defcdb
CM		 2426static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
2427{
fca3b747
CM		 2428 struct smi_info *info = pci_get_drvdata(pdev);
2429 cleanup_one_si(info);
b0defcdb 2430}
1da177e4 2431
b0defcdb
CM		 2432#ifdef CONFIG_PM
2433static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2434{
1da177e4
LT		 2435 return 0;
2436}
1da177e4 2437
b0defcdb 2438static int ipmi_pci_resume(struct pci_dev *pdev)
1da177e4 2439{
b0defcdb
CM		 2440 return 0;
2441}
1da177e4 2442#endif
1da177e4 2443
b0defcdb
CM		 2444static struct pci_device_id ipmi_pci_devices[] = {
2445 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
248bdd5e
KC		 2446 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2447 { 0, }
b0defcdb
CM		 2448};
2449MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2450
2451static struct pci_driver ipmi_pci_driver = {
c305e3d3
CM		 2452 .name = DEVICE_NAME,
2453 .id_table = ipmi_pci_devices,
2454 .probe = ipmi_pci_probe,
2455 .remove = __devexit_p(ipmi_pci_remove),
b0defcdb 2456#ifdef CONFIG_PM
c305e3d3
CM		 2457 .suspend = ipmi_pci_suspend,
2458 .resume = ipmi_pci_resume,
b0defcdb
CM		 2459#endif
2460};
2461#endif /* CONFIG_PCI */
1da177e4
LT		 2462
2463
dba9b4f6
CM		 2464#ifdef CONFIG_PPC_OF
2465static int __devinit ipmi_of_probe(struct of_device *dev,
2466 const struct of_device_id *match)
2467{
2468 struct smi_info *info;
2469 struct resource resource;
2470 const int *regsize, *regspacing, *regshift;
2471 struct device_node *np = dev->node;
2472 int ret;
2473 int proplen;
2474
2475 dev_info(&dev->dev, PFX "probing via device tree\n");
2476
2477 ret = of_address_to_resource(np, 0, &resource);
2478 if (ret) {
2479 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2480 return ret;
2481 }
2482
9c25099d 2483 regsize = of_get_property(np, "reg-size", &proplen);
dba9b4f6
CM		 2484 if (regsize && proplen != 4) {
2485 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2486 return -EINVAL;
2487 }
2488
9c25099d 2489 regspacing = of_get_property(np, "reg-spacing", &proplen);
dba9b4f6
CM		 2490 if (regspacing && proplen != 4) {
2491 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2492 return -EINVAL;
2493 }
2494
9c25099d 2495 regshift = of_get_property(np, "reg-shift", &proplen);
dba9b4f6
CM		 2496 if (regshift && proplen != 4) {
2497 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2498 return -EINVAL;
2499 }
2500
2501 info = kzalloc(sizeof(*info), GFP_KERNEL);
2502
2503 if (!info) {
2504 dev_err(&dev->dev,
2505 PFX "could not allocate memory for OF probe\n");
2506 return -ENOMEM;
2507 }
2508
2509 info->si_type = (enum si_type) match->data;
2510 info->addr_source = "device-tree";
dba9b4f6
CM		 2511 info->irq_setup = std_irq_setup;
2512
3b7ec117
NC		 2513 if (resource.flags & IORESOURCE_IO) {
2514 info->io_setup = port_setup;
2515 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2516 } else {
2517 info->io_setup = mem_setup;
2518 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2519 }
2520
dba9b4f6
CM		 2521 info->io.addr_data = resource.start;
2522
2523 info->io.regsize = regsize ? *regsize : DEFAULT_REGSIZE;
2524 info->io.regspacing = regspacing ? *regspacing : DEFAULT_REGSPACING;
2525 info->io.regshift = regshift ? *regshift : 0;
2526
2527 info->irq = irq_of_parse_and_map(dev->node, 0);
2528 info->dev = &dev->dev;
2529
32d21985 2530 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %x\n",
dba9b4f6
CM		 2531 info->io.addr_data, info->io.regsize, info->io.regspacing,
2532 info->irq);
2533
9de33df4 2534 dev_set_drvdata(&dev->dev, info);
dba9b4f6
CM		 2535
2536 return try_smi_init(info);
2537}
2538
2539static int __devexit ipmi_of_remove(struct of_device *dev)
2540{
9de33df4 2541 cleanup_one_si(dev_get_drvdata(&dev->dev));
dba9b4f6
CM		 2542 return 0;
2543}
2544
2545static struct of_device_id ipmi_match[] =
2546{
c305e3d3
CM		 2547 { .type = "ipmi", .compatible = "ipmi-kcs",
2548 .data = (void *)(unsigned long) SI_KCS },
2549 { .type = "ipmi", .compatible = "ipmi-smic",
2550 .data = (void *)(unsigned long) SI_SMIC },
2551 { .type = "ipmi", .compatible = "ipmi-bt",
2552 .data = (void *)(unsigned long) SI_BT },
dba9b4f6
CM		 2553 {},
2554};
2555
c305e3d3 2556static struct of_platform_driver ipmi_of_platform_driver = {
dba9b4f6
CM		 2557 .name = "ipmi",
2558 .match_table = ipmi_match,
2559 .probe = ipmi_of_probe,
2560 .remove = __devexit_p(ipmi_of_remove),
2561};
2562#endif /* CONFIG_PPC_OF */
2563
40112ae7 2564static int wait_for_msg_done(struct smi_info *smi_info)
1da177e4 2565{
50c812b2 2566 enum si_sm_result smi_result;
1da177e4
LT		 2567
2568 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
c305e3d3 2569 for (;;) {
c3e7e791
CM		 2570 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2571 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
da4cd8df 2572 schedule_timeout_uninterruptible(1);
1da177e4
LT		 2573 smi_result = smi_info->handlers->event(
2574 smi_info->si_sm, 100);
c305e3d3 2575 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
1da177e4
LT		 2576 smi_result = smi_info->handlers->event(
2577 smi_info->si_sm, 0);
c305e3d3 2578 } else
1da177e4
LT		 2579 break;
2580 }
40112ae7 2581 if (smi_result == SI_SM_HOSED)
c305e3d3
CM		 2582 /*
2583 * We couldn't get the state machine to run, so whatever's at
2584 * the port is probably not an IPMI SMI interface.
2585 */
40112ae7
CM		 2586 return -ENODEV;
2587
2588 return 0;
2589}
2590
2591static int try_get_dev_id(struct smi_info *smi_info)
2592{
2593 unsigned char msg[2];
2594 unsigned char *resp;
2595 unsigned long resp_len;
2596 int rv = 0;
2597
2598 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2599 if (!resp)
2600 return -ENOMEM;
2601
2602 /*
2603 * Do a Get Device ID command, since it comes back with some
2604 * useful info.
2605 */
2606 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2607 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2608 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2609
2610 rv = wait_for_msg_done(smi_info);
2611 if (rv)
1da177e4 2612 goto out;
1da177e4 2613
1da177e4
LT		 2614 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2615 resp, IPMI_MAX_MSG_LENGTH);
1da177e4 2616
d8c98618
CM		 2617 /* Check and record info from the get device id, in case we need it. */
2618 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
1da177e4
LT		 2619
2620 out:
2621 kfree(resp);
2622 return rv;
2623}
2624
40112ae7
CM		 2625static int try_enable_event_buffer(struct smi_info *smi_info)
2626{
2627 unsigned char msg[3];
2628 unsigned char *resp;
2629 unsigned long resp_len;
2630 int rv = 0;
2631
2632 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2633 if (!resp)
2634 return -ENOMEM;
2635
2636 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2637 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2638 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2639
2640 rv = wait_for_msg_done(smi_info);
2641 if (rv) {
2642 printk(KERN_WARNING
2643 "ipmi_si: Error getting response from get global,"
2644 " enables command, the event buffer is not"
2645 " enabled.\n");
2646 goto out;
2647 }
2648
2649 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2650 resp, IPMI_MAX_MSG_LENGTH);
2651
2652 if (resp_len < 4 ||
2653 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2654 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2655 resp[2] != 0) {
2656 printk(KERN_WARNING
2657 "ipmi_si: Invalid return from get global"
2658 " enables command, cannot enable the event"
2659 " buffer.\n");
2660 rv = -EINVAL;
2661 goto out;
2662 }
2663
2664 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2665 /* buffer is already enabled, nothing to do. */
2666 goto out;
2667
2668 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2669 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2670 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2671 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2672
2673 rv = wait_for_msg_done(smi_info);
2674 if (rv) {
2675 printk(KERN_WARNING
2676 "ipmi_si: Error getting response from set global,"
2677 " enables command, the event buffer is not"
2678 " enabled.\n");
2679 goto out;
2680 }
2681
2682 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2683 resp, IPMI_MAX_MSG_LENGTH);
2684
2685 if (resp_len < 3 ||
2686 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2687 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
2688 printk(KERN_WARNING
2689 "ipmi_si: Invalid return from get global,"
2690 "enables command, not enable the event"
2691 " buffer.\n");
2692 rv = -EINVAL;
2693 goto out;
2694 }
2695
2696 if (resp[2] != 0)
2697 /*
2698 * An error when setting the event buffer bit means
2699 * that the event buffer is not supported.
2700 */
2701 rv = -ENOENT;
2702 out:
2703 kfree(resp);
2704 return rv;
2705}
2706
1da177e4
LT		 2707static int type_file_read_proc(char *page, char **start, off_t off,
2708 int count, int *eof, void *data)
2709{
1da177e4
LT		 2710 struct smi_info *smi = data;
2711
b361e27b 2712 return sprintf(page, "%s\n", si_to_str[smi->si_type]);
1da177e4
LT		 2713}
2714
2715static int stat_file_read_proc(char *page, char **start, off_t off,
2716 int count, int *eof, void *data)
2717{
2718 char *out = (char *) page;
2719 struct smi_info *smi = data;
2720
2721 out += sprintf(out, "interrupts_enabled: %d\n",
b0defcdb 2722 smi->irq && !smi->interrupt_disabled);
64959e2d
CM		 2723 out += sprintf(out, "short_timeouts: %u\n",
2724 smi_get_stat(smi, short_timeouts));
2725 out += sprintf(out, "long_timeouts: %u\n",
2726 smi_get_stat(smi, long_timeouts));
64959e2d
CM		 2727 out += sprintf(out, "idles: %u\n",
2728 smi_get_stat(smi, idles));
2729 out += sprintf(out, "interrupts: %u\n",
2730 smi_get_stat(smi, interrupts));
2731 out += sprintf(out, "attentions: %u\n",
2732 smi_get_stat(smi, attentions));
2733 out += sprintf(out, "flag_fetches: %u\n",
2734 smi_get_stat(smi, flag_fetches));
2735 out += sprintf(out, "hosed_count: %u\n",
2736 smi_get_stat(smi, hosed_count));
2737 out += sprintf(out, "complete_transactions: %u\n",
2738 smi_get_stat(smi, complete_transactions));
2739 out += sprintf(out, "events: %u\n",
2740 smi_get_stat(smi, events));
2741 out += sprintf(out, "watchdog_pretimeouts: %u\n",
2742 smi_get_stat(smi, watchdog_pretimeouts));
2743 out += sprintf(out, "incoming_messages: %u\n",
2744 smi_get_stat(smi, incoming_messages));
1da177e4 2745
b361e27b
CM		 2746 return out - page;
2747}
2748
2749static int param_read_proc(char *page, char **start, off_t off,
2750 int count, int *eof, void *data)
2751{
2752 struct smi_info *smi = data;
2753
2754 return sprintf(page,
2755 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2756 si_to_str[smi->si_type],
2757 addr_space_to_str[smi->io.addr_type],
2758 smi->io.addr_data,
2759 smi->io.regspacing,
2760 smi->io.regsize,
2761 smi->io.regshift,
2762 smi->irq,
2763 smi->slave_addr);
1da177e4
LT		 2764}
2765
3ae0e0f9
CM		 2766/*
2767 * oem_data_avail_to_receive_msg_avail
2768 * @info - smi_info structure with msg_flags set
2769 *
2770 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2771 * Returns 1 indicating need to re-run handle_flags().
2772 */
2773static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2774{
e8b33617 2775 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
c305e3d3 2776 RECEIVE_MSG_AVAIL);
3ae0e0f9
CM		 2777 return 1;
2778}
2779
2780/*
2781 * setup_dell_poweredge_oem_data_handler
2782 * @info - smi_info.device_id must be populated
2783 *
2784 * Systems that match, but have firmware version < 1.40 may assert
2785 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2786 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2787 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2788 * as RECEIVE_MSG_AVAIL instead.
2789 *
2790 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2791 * assert the OEM[012] bits, and if it did, the driver would have to
2792 * change to handle that properly, we don't actually check for the
2793 * firmware version.
2794 * Device ID = 0x20 BMC on PowerEdge 8G servers
2795 * Device Revision = 0x80
2796 * Firmware Revision1 = 0x01 BMC version 1.40
2797 * Firmware Revision2 = 0x40 BCD encoded
2798 * IPMI Version = 0x51 IPMI 1.5
2799 * Manufacturer ID = A2 02 00 Dell IANA
2800 *
d5a2b89a
CM		 2801 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2802 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2803 *
3ae0e0f9
CM		 2804 */
2805#define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2806#define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2807#define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
50c812b2 2808#define DELL_IANA_MFR_ID 0x0002a2
3ae0e0f9
CM		 2809static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
2810{
2811 struct ipmi_device_id *id = &smi_info->device_id;
50c812b2 2812 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
d5a2b89a
CM		 2813 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
2814 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
50c812b2 2815 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
d5a2b89a
CM		 2816 smi_info->oem_data_avail_handler =
2817 oem_data_avail_to_receive_msg_avail;
c305e3d3
CM		 2818 } else if (ipmi_version_major(id) < 1 ||
2819 (ipmi_version_major(id) == 1 &&
2820 ipmi_version_minor(id) < 5)) {
d5a2b89a
CM		 2821 smi_info->oem_data_avail_handler =
2822 oem_data_avail_to_receive_msg_avail;
2823 }
3ae0e0f9
CM		 2824 }
2825}
2826
ea94027b
CM		 2827#define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2828static void return_hosed_msg_badsize(struct smi_info *smi_info)
2829{
2830 struct ipmi_smi_msg *msg = smi_info->curr_msg;
2831
2832 /* Make it a reponse */
2833 msg->rsp[0] = msg->data[0] | 4;
2834 msg->rsp[1] = msg->data[1];
2835 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
2836 msg->rsp_size = 3;
2837 smi_info->curr_msg = NULL;
2838 deliver_recv_msg(smi_info, msg);
2839}
2840
2841/*
2842 * dell_poweredge_bt_xaction_handler
2843 * @info - smi_info.device_id must be populated
2844 *
2845 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2846 * not respond to a Get SDR command if the length of the data
2847 * requested is exactly 0x3A, which leads to command timeouts and no
2848 * data returned. This intercepts such commands, and causes userspace
2849 * callers to try again with a different-sized buffer, which succeeds.
2850 */
2851
2852#define STORAGE_NETFN 0x0A
2853#define STORAGE_CMD_GET_SDR 0x23
2854static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
2855 unsigned long unused,
2856 void *in)
2857{
2858 struct smi_info *smi_info = in;
2859 unsigned char *data = smi_info->curr_msg->data;
2860 unsigned int size = smi_info->curr_msg->data_size;
2861 if (size >= 8 &&
2862 (data[0]>>2) == STORAGE_NETFN &&
2863 data[1] == STORAGE_CMD_GET_SDR &&
2864 data[7] == 0x3A) {
2865 return_hosed_msg_badsize(smi_info);
2866 return NOTIFY_STOP;
2867 }
2868 return NOTIFY_DONE;
2869}
2870
2871static struct notifier_block dell_poweredge_bt_xaction_notifier = {
2872 .notifier_call = dell_poweredge_bt_xaction_handler,
2873};
2874
2875/*
2876 * setup_dell_poweredge_bt_xaction_handler
2877 * @info - smi_info.device_id must be filled in already
2878 *
2879 * Fills in smi_info.device_id.start_transaction_pre_hook
2880 * when we know what function to use there.
2881 */
2882static void
2883setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
2884{
2885 struct ipmi_device_id *id = &smi_info->device_id;
50c812b2 2886 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
ea94027b
CM		 2887 smi_info->si_type == SI_BT)
2888 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
2889}
2890
3ae0e0f9
CM		 2891/*
2892 * setup_oem_data_handler
2893 * @info - smi_info.device_id must be filled in already
2894 *
2895 * Fills in smi_info.device_id.oem_data_available_handler
2896 * when we know what function to use there.
2897 */
2898
2899static void setup_oem_data_handler(struct smi_info *smi_info)
2900{
2901 setup_dell_poweredge_oem_data_handler(smi_info);
2902}
2903
ea94027b
CM		 2904static void setup_xaction_handlers(struct smi_info *smi_info)
2905{
2906 setup_dell_poweredge_bt_xaction_handler(smi_info);
2907}
2908
a9a2c44f
CM		 2909static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
2910{
453823ba 2911 if (smi_info->intf) {
c305e3d3
CM		 2912 /*
2913 * The timer and thread are only running if the
2914 * interface has been started up and registered.
2915 */
453823ba
CM		 2916 if (smi_info->thread != NULL)
2917 kthread_stop(smi_info->thread);
2918 del_timer_sync(&smi_info->si_timer);
2919 }
a9a2c44f
CM		 2920}
2921
7420884c 2922static __devinitdata struct ipmi_default_vals
b0defcdb
CM		 2923{
2924 int type;
2925 int port;
7420884c 2926} ipmi_defaults[] =
b0defcdb
CM		 2927{
2928 { .type = SI_KCS, .port = 0xca2 },
2929 { .type = SI_SMIC, .port = 0xca9 },
2930 { .type = SI_BT, .port = 0xe4 },
2931 { .port = 0 }
2932};
2933
2934static __devinit void default_find_bmc(void)
2935{
2936 struct smi_info *info;
2937 int i;
2938
2939 for (i = 0; ; i++) {
2940 if (!ipmi_defaults[i].port)
2941 break;
68e1ee62 2942#ifdef CONFIG_PPC
4ff31d77
CK		 2943 if (check_legacy_ioport(ipmi_defaults[i].port))
2944 continue;
2945#endif
a09f4855
AM		 2946 info = kzalloc(sizeof(*info), GFP_KERNEL);
2947 if (!info)
2948 return;
4ff31d77 2949
b0defcdb
CM		 2950 info->addr_source = NULL;
2951
2952 info->si_type = ipmi_defaults[i].type;
2953 info->io_setup = port_setup;
2954 info->io.addr_data = ipmi_defaults[i].port;
2955 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2956
2957 info->io.addr = NULL;
2958 info->io.regspacing = DEFAULT_REGSPACING;
2959 info->io.regsize = DEFAULT_REGSPACING;
2960 info->io.regshift = 0;
2961
2962 if (try_smi_init(info) == 0) {
2963 /* Found one... */
2964 printk(KERN_INFO "ipmi_si: Found default %s state"
2965 " machine at %s address 0x%lx\n",
2966 si_to_str[info->si_type],
2967 addr_space_to_str[info->io.addr_type],
2968 info->io.addr_data);
2969 return;
2970 }
2971 }
2972}
2973
2974static int is_new_interface(struct smi_info *info)
1da177e4 2975{
b0defcdb 2976 struct smi_info *e;
1da177e4 2977
b0defcdb
CM		 2978 list_for_each_entry(e, &smi_infos, link) {
2979 if (e->io.addr_type != info->io.addr_type)
2980 continue;
2981 if (e->io.addr_data == info->io.addr_data)
2982 return 0;
2983 }
1da177e4 2984
b0defcdb
CM		 2985 return 1;
2986}
1da177e4 2987
b0defcdb
CM		 2988static int try_smi_init(struct smi_info *new_smi)
2989{
2990 int rv;
64959e2d 2991 int i;
b0defcdb
CM		 2992
2993 if (new_smi->addr_source) {
2994 printk(KERN_INFO "ipmi_si: Trying %s-specified %s state"
2995 " machine at %s address 0x%lx, slave address 0x%x,"
2996 " irq %d\n",
2997 new_smi->addr_source,
2998 si_to_str[new_smi->si_type],
2999 addr_space_to_str[new_smi->io.addr_type],
3000 new_smi->io.addr_data,
3001 new_smi->slave_addr, new_smi->irq);
3002 }
3003
d6dfd131 3004 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 3005 if (!is_new_interface(new_smi)) {
3006 printk(KERN_WARNING "ipmi_si: duplicate interface\n");
3007 rv = -EBUSY;
3008 goto out_err;
3009 }
1da177e4
LT		 3010
3011 /* So we know not to free it unless we have allocated one. */
3012 new_smi->intf = NULL;
3013 new_smi->si_sm = NULL;
3014 new_smi->handlers = NULL;
3015
b0defcdb
CM		 3016 switch (new_smi->si_type) {
3017 case SI_KCS:
1da177e4 3018 new_smi->handlers = &kcs_smi_handlers;
b0defcdb
CM		 3019 break;
3020
3021 case SI_SMIC:
1da177e4 3022 new_smi->handlers = &smic_smi_handlers;
b0defcdb
CM		 3023 break;
3024
3025 case SI_BT:
1da177e4 3026 new_smi->handlers = &bt_smi_handlers;
b0defcdb
CM		 3027 break;
3028
3029 default:
1da177e4
LT		 3030 /* No support for anything else yet. */
3031 rv = -EIO;
3032 goto out_err;
3033 }
3034
3035 /* Allocate the state machine's data and initialize it. */
3036 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
b0defcdb 3037 if (!new_smi->si_sm) {
c305e3d3 3038 printk(KERN_ERR "Could not allocate state machine memory\n");
1da177e4
LT		 3039 rv = -ENOMEM;
3040 goto out_err;
3041 }
3042 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3043 &new_smi->io);
3044
3045 /* Now that we know the I/O size, we can set up the I/O. */
3046 rv = new_smi->io_setup(new_smi);
3047 if (rv) {
c305e3d3 3048 printk(KERN_ERR "Could not set up I/O space\n");
1da177e4
LT		 3049 goto out_err;
3050 }
3051
3052 spin_lock_init(&(new_smi->si_lock));
3053 spin_lock_init(&(new_smi->msg_lock));
1da177e4
LT		 3054
3055 /* Do low-level detection first. */
3056 if (new_smi->handlers->detect(new_smi->si_sm)) {
b0defcdb
CM		 3057 if (new_smi->addr_source)
3058 printk(KERN_INFO "ipmi_si: Interface detection"
3059 " failed\n");
1da177e4
LT		 3060 rv = -ENODEV;
3061 goto out_err;
3062 }
3063
c305e3d3
CM		 3064 /*
3065 * Attempt a get device id command. If it fails, we probably
3066 * don't have a BMC here.
3067 */
1da177e4 3068 rv = try_get_dev_id(new_smi);
b0defcdb
CM		 3069 if (rv) {
3070 if (new_smi->addr_source)
3071 printk(KERN_INFO "ipmi_si: There appears to be no BMC"
3072 " at this location\n");
1da177e4 3073 goto out_err;
b0defcdb 3074 }
1da177e4 3075
3ae0e0f9 3076 setup_oem_data_handler(new_smi);
ea94027b 3077 setup_xaction_handlers(new_smi);
3ae0e0f9 3078
1da177e4
LT		 3079 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3080 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3081 new_smi->curr_msg = NULL;
3082 atomic_set(&new_smi->req_events, 0);
3083 new_smi->run_to_completion = 0;
64959e2d
CM		 3084 for (i = 0; i < SI_NUM_STATS; i++)
3085 atomic_set(&new_smi->stats[i], 0);
1da177e4
LT		 3086
3087 new_smi->interrupt_disabled = 0;
a9a2c44f 3088 atomic_set(&new_smi->stop_operation, 0);
b0defcdb
CM		 3089 new_smi->intf_num = smi_num;
3090 smi_num++;
1da177e4 3091
40112ae7
CM		 3092 rv = try_enable_event_buffer(new_smi);
3093 if (rv == 0)
3094 new_smi->has_event_buffer = 1;
3095
c305e3d3
CM		 3096 /*
3097 * Start clearing the flags before we enable interrupts or the
3098 * timer to avoid racing with the timer.
3099 */
1da177e4
LT		 3100 start_clear_flags(new_smi);
3101 /* IRQ is defined to be set when non-zero. */
3102 if (new_smi->irq)
3103 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3104
50c812b2 3105 if (!new_smi->dev) {
c305e3d3
CM		 3106 /*
3107 * If we don't already have a device from something
3108 * else (like PCI), then register a new one.
3109 */
50c812b2
CM		 3110 new_smi->pdev = platform_device_alloc("ipmi_si",
3111 new_smi->intf_num);
8b32b5d0 3112 if (!new_smi->pdev) {
50c812b2
CM		 3113 printk(KERN_ERR
3114 "ipmi_si_intf:"
3115 " Unable to allocate platform device\n");
453823ba 3116 goto out_err;
50c812b2
CM		 3117 }
3118 new_smi->dev = &new_smi->pdev->dev;
fe2d5ffc 3119 new_smi->dev->driver = &ipmi_driver.driver;
50c812b2 3120
b48f5457 3121 rv = platform_device_add(new_smi->pdev);
50c812b2
CM		 3122 if (rv) {
3123 printk(KERN_ERR
3124 "ipmi_si_intf:"
3125 " Unable to register system interface device:"
3126 " %d\n",
3127 rv);
453823ba 3128 goto out_err;
50c812b2
CM		 3129 }
3130 new_smi->dev_registered = 1;
3131 }
3132
1da177e4
LT		 3133 rv = ipmi_register_smi(&handlers,
3134 new_smi,
50c812b2
CM		 3135 &new_smi->device_id,
3136 new_smi->dev,
759643b8 3137 "bmc",
453823ba 3138 new_smi->slave_addr);
1da177e4
LT		 3139 if (rv) {
3140 printk(KERN_ERR
3141 "ipmi_si: Unable to register device: error %d\n",
3142 rv);
3143 goto out_err_stop_timer;
3144 }
3145
3146 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
fa68be0d 3147 type_file_read_proc,
99b76233 3148 new_smi);
1da177e4
LT		 3149 if (rv) {
3150 printk(KERN_ERR
3151 "ipmi_si: Unable to create proc entry: %d\n",
3152 rv);
3153 goto out_err_stop_timer;
3154 }
3155
3156 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
fa68be0d 3157 stat_file_read_proc,
99b76233 3158 new_smi);
1da177e4
LT		 3159 if (rv) {
3160 printk(KERN_ERR
3161 "ipmi_si: Unable to create proc entry: %d\n",
3162 rv);
3163 goto out_err_stop_timer;
3164 }
3165
b361e27b 3166 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
fa68be0d 3167 param_read_proc,
99b76233 3168 new_smi);
b361e27b
CM		 3169 if (rv) {
3170 printk(KERN_ERR
3171 "ipmi_si: Unable to create proc entry: %d\n",
3172 rv);
3173 goto out_err_stop_timer;
3174 }
3175
b0defcdb
CM		 3176 list_add_tail(&new_smi->link, &smi_infos);
3177
d6dfd131 3178 mutex_unlock(&smi_infos_lock);
1da177e4 3179
c305e3d3
CM		 3180 printk(KERN_INFO "IPMI %s interface initialized\n",
3181 si_to_str[new_smi->si_type]);
1da177e4
LT		 3182
3183 return 0;
3184
3185 out_err_stop_timer:
a9a2c44f
CM		 3186 atomic_inc(&new_smi->stop_operation);
3187 wait_for_timer_and_thread(new_smi);
1da177e4
LT		 3188
3189 out_err:
3190 if (new_smi->intf)
3191 ipmi_unregister_smi(new_smi->intf);
3192
b0defcdb
CM		 3193 if (new_smi->irq_cleanup)
3194 new_smi->irq_cleanup(new_smi);
1da177e4 3195
c305e3d3
CM		 3196 /*
3197 * Wait until we know that we are out of any interrupt
3198 * handlers might have been running before we freed the
3199 * interrupt.
3200 */
fbd568a3 3201 synchronize_sched();
1da177e4
LT		 3202
3203 if (new_smi->si_sm) {
3204 if (new_smi->handlers)
3205 new_smi->handlers->cleanup(new_smi->si_sm);
3206 kfree(new_smi->si_sm);
3207 }
b0defcdb
CM		 3208 if (new_smi->addr_source_cleanup)
3209 new_smi->addr_source_cleanup(new_smi);
7767e126
PG		 3210 if (new_smi->io_cleanup)
3211 new_smi->io_cleanup(new_smi);
1da177e4 3212
50c812b2
CM		 3213 if (new_smi->dev_registered)
3214 platform_device_unregister(new_smi->pdev);
3215
3216 kfree(new_smi);
3217
d6dfd131 3218 mutex_unlock(&smi_infos_lock);
b0defcdb 3219
1da177e4
LT		 3220 return rv;
3221}
3222
b0defcdb 3223static __devinit int init_ipmi_si(void)
1da177e4 3224{
1da177e4
LT		 3225 int i;
3226 char *str;
50c812b2 3227 int rv;
1da177e4
LT		 3228
3229 if (initialized)
3230 return 0;
3231 initialized = 1;
3232
50c812b2 3233 /* Register the device drivers. */
fe2d5ffc 3234 rv = driver_register(&ipmi_driver.driver);
50c812b2
CM		 3235 if (rv) {
3236 printk(KERN_ERR
3237 "init_ipmi_si: Unable to register driver: %d\n",
3238 rv);
3239 return rv;
3240 }
3241
3242
1da177e4
LT		 3243 /* Parse out the si_type string into its components. */
3244 str = si_type_str;
3245 if (*str != '\0') {
e8b33617 3246 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
1da177e4
LT		 3247 si_type[i] = str;
3248 str = strchr(str, ',');
3249 if (str) {
3250 *str = '\0';
3251 str++;
3252 } else {
3253 break;
3254 }
3255 }
3256 }
3257
1fdd75bd 3258 printk(KERN_INFO "IPMI System Interface driver.\n");
1da177e4 3259
b0defcdb
CM		 3260 hardcode_find_bmc();
3261
a9fad4cc 3262#ifdef CONFIG_DMI
b224cd3a 3263 dmi_find_bmc();
1da177e4
LT		 3264#endif
3265
b0defcdb 3266#ifdef CONFIG_ACPI
18a3e0bf 3267 spmi_find_bmc();
b0defcdb 3268#endif
27d0567a 3269#ifdef CONFIG_ACPI
9e368fa0
BH		 3270 pnp_register_driver(&ipmi_pnp_driver);
3271#endif
1da177e4 3272
b0defcdb 3273#ifdef CONFIG_PCI
168b35a7 3274 rv = pci_register_driver(&ipmi_pci_driver);
c305e3d3 3275 if (rv)
168b35a7
CM		 3276 printk(KERN_ERR
3277 "init_ipmi_si: Unable to register PCI driver: %d\n",
3278 rv);
b0defcdb
CM		 3279#endif
3280
dba9b4f6
CM		 3281#ifdef CONFIG_PPC_OF
3282 of_register_platform_driver(&ipmi_of_platform_driver);
3283#endif
3284
b0defcdb 3285 if (si_trydefaults) {
d6dfd131 3286 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 3287 if (list_empty(&smi_infos)) {
3288 /* No BMC was found, try defaults. */
d6dfd131 3289 mutex_unlock(&smi_infos_lock);
b0defcdb
CM		 3290 default_find_bmc();
3291 } else {
d6dfd131 3292 mutex_unlock(&smi_infos_lock);
b0defcdb 3293 }
1da177e4
LT		 3294 }
3295
d6dfd131 3296 mutex_lock(&smi_infos_lock);
b361e27b 3297 if (unload_when_empty && list_empty(&smi_infos)) {
d6dfd131 3298 mutex_unlock(&smi_infos_lock);
b0defcdb
CM		 3299#ifdef CONFIG_PCI
3300 pci_unregister_driver(&ipmi_pci_driver);
3301#endif
10fb62e5
CK		 3302
3303#ifdef CONFIG_PPC_OF
3304 of_unregister_platform_driver(&ipmi_of_platform_driver);
3305#endif
fe2d5ffc 3306 driver_unregister(&ipmi_driver.driver);
c305e3d3
CM		 3307 printk(KERN_WARNING
3308 "ipmi_si: Unable to find any System Interface(s)\n");
1da177e4 3309 return -ENODEV;
b0defcdb 3310 } else {
d6dfd131 3311 mutex_unlock(&smi_infos_lock);
b0defcdb 3312 return 0;
1da177e4 3313 }
1da177e4
LT		 3314}
3315module_init(init_ipmi_si);
3316
b361e27b 3317static void cleanup_one_si(struct smi_info *to_clean)
1da177e4
LT		 3318{
3319 int rv;
3320 unsigned long flags;
3321
b0defcdb 3322 if (!to_clean)
1da177e4
LT		 3323 return;
3324
b0defcdb
CM		 3325 list_del(&to_clean->link);
3326
ee6cd5f8 3327 /* Tell the driver that we are shutting down. */
a9a2c44f 3328 atomic_inc(&to_clean->stop_operation);
b0defcdb 3329
c305e3d3
CM		 3330 /*
3331 * Make sure the timer and thread are stopped and will not run
3332 * again.
3333 */
a9a2c44f 3334 wait_for_timer_and_thread(to_clean);
1da177e4 3335
c305e3d3
CM		 3336 /*
3337 * Timeouts are stopped, now make sure the interrupts are off
3338 * for the device. A little tricky with locks to make sure
3339 * there are no races.
3340 */
ee6cd5f8
CM		 3341 spin_lock_irqsave(&to_clean->si_lock, flags);
3342 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3343 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3344 poll(to_clean);
3345 schedule_timeout_uninterruptible(1);
3346 spin_lock_irqsave(&to_clean->si_lock, flags);
3347 }
3348 disable_si_irq(to_clean);
3349 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3350 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3351 poll(to_clean);
3352 schedule_timeout_uninterruptible(1);
3353 }
3354
3355 /* Clean up interrupts and make sure that everything is done. */
3356 if (to_clean->irq_cleanup)
3357 to_clean->irq_cleanup(to_clean);
e8b33617 3358 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
1da177e4 3359 poll(to_clean);
da4cd8df 3360 schedule_timeout_uninterruptible(1);
1da177e4
LT		 3361 }
3362
3363 rv = ipmi_unregister_smi(to_clean->intf);
3364 if (rv) {
3365 printk(KERN_ERR
3366 "ipmi_si: Unable to unregister device: errno=%d\n",
3367 rv);
3368 }
3369
3370 to_clean->handlers->cleanup(to_clean->si_sm);
3371
3372 kfree(to_clean->si_sm);
3373
b0defcdb
CM		 3374 if (to_clean->addr_source_cleanup)
3375 to_clean->addr_source_cleanup(to_clean);
7767e126
PG		 3376 if (to_clean->io_cleanup)
3377 to_clean->io_cleanup(to_clean);
50c812b2
CM		 3378
3379 if (to_clean->dev_registered)
3380 platform_device_unregister(to_clean->pdev);
3381
3382 kfree(to_clean);
1da177e4
LT		 3383}
3384
3385static __exit void cleanup_ipmi_si(void)
3386{
b0defcdb 3387 struct smi_info *e, *tmp_e;
1da177e4 3388
b0defcdb 3389 if (!initialized)
1da177e4
LT		 3390 return;
3391
b0defcdb
CM		 3392#ifdef CONFIG_PCI
3393 pci_unregister_driver(&ipmi_pci_driver);
3394#endif
27d0567a 3395#ifdef CONFIG_ACPI
9e368fa0
BH		 3396 pnp_unregister_driver(&ipmi_pnp_driver);
3397#endif
b0defcdb 3398
dba9b4f6
CM		 3399#ifdef CONFIG_PPC_OF
3400 of_unregister_platform_driver(&ipmi_of_platform_driver);
3401#endif
3402
d6dfd131 3403 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 3404 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3405 cleanup_one_si(e);
d6dfd131 3406 mutex_unlock(&smi_infos_lock);
50c812b2 3407
fe2d5ffc 3408 driver_unregister(&ipmi_driver.driver);
1da177e4
LT		 3409}
3410module_exit(cleanup_ipmi_si);
3411
3412MODULE_LICENSE("GPL");
1fdd75bd 3413MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
c305e3d3
CM		 3414MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3415 " system interfaces.");
Linux kernel - Deliverables
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