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ipmi: fix memleaking for add_smi when duplicating happen
[net-next-2.6.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
5fedc4a2
MG		 110enum ipmi_addr_src {
111 SI_INVALID = 0, SI_HOTMOD, SI_HARDCODED, SI_SPMI, SI_ACPI, SI_SMBIOS,
112 SI_PCI, SI_DEVICETREE, SI_DEFAULT
113};
114static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI",
115 "ACPI", "SMBIOS", "PCI",
116 "device-tree", "default" };
117
50c812b2
CM		 118#define DEVICE_NAME "ipmi_si"
119
fe2d5ffc
DW		 120static struct platform_driver ipmi_driver = {
121 .driver = {
122 .name = DEVICE_NAME,
123 .bus = &platform_bus_type
124 }
50c812b2 125};
3ae0e0f9 126
64959e2d
CM		 127
128/*
129 * Indexes into stats[] in smi_info below.
130 */
ba8ff1c6
CM		 131enum si_stat_indexes {
132 /*
133 * Number of times the driver requested a timer while an operation
134 * was in progress.
135 */
136 SI_STAT_short_timeouts = 0,
137
138 /*
139 * Number of times the driver requested a timer while nothing was in
140 * progress.
141 */
142 SI_STAT_long_timeouts,
143
144 /* Number of times the interface was idle while being polled. */
145 SI_STAT_idles,
146
147 /* Number of interrupts the driver handled. */
148 SI_STAT_interrupts,
149
150 /* Number of time the driver got an ATTN from the hardware. */
151 SI_STAT_attentions,
64959e2d 152
ba8ff1c6
CM		 153 /* Number of times the driver requested flags from the hardware. */
154 SI_STAT_flag_fetches,
155
156 /* Number of times the hardware didn't follow the state machine. */
157 SI_STAT_hosed_count,
158
159 /* Number of completed messages. */
160 SI_STAT_complete_transactions,
161
162 /* Number of IPMI events received from the hardware. */
163 SI_STAT_events,
164
165 /* Number of watchdog pretimeouts. */
166 SI_STAT_watchdog_pretimeouts,
167
168 /* Number of asyncronous messages received. */
169 SI_STAT_incoming_messages,
170
171
172 /* This *must* remain last, add new values above this. */
173 SI_NUM_STATS
174};
64959e2d 175
c305e3d3 176struct smi_info {
a9a2c44f 177 int intf_num;
1da177e4
LT		 178 ipmi_smi_t intf;
179 struct si_sm_data *si_sm;
180 struct si_sm_handlers *handlers;
181 enum si_type si_type;
182 spinlock_t si_lock;
183 spinlock_t msg_lock;
184 struct list_head xmit_msgs;
185 struct list_head hp_xmit_msgs;
186 struct ipmi_smi_msg *curr_msg;
187 enum si_intf_state si_state;
188
c305e3d3
CM		 189 /*
190 * Used to handle the various types of I/O that can occur with
191 * IPMI
192 */
1da177e4
LT		 193 struct si_sm_io io;
194 int (*io_setup)(struct smi_info *info);
195 void (*io_cleanup)(struct smi_info *info);
196 int (*irq_setup)(struct smi_info *info);
197 void (*irq_cleanup)(struct smi_info *info);
198 unsigned int io_size;
5fedc4a2 199 enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
b0defcdb
CM		 200 void (*addr_source_cleanup)(struct smi_info *info);
201 void *addr_source_data;
1da177e4 202
c305e3d3
CM		 203 /*
204 * Per-OEM handler, called from handle_flags(). Returns 1
205 * when handle_flags() needs to be re-run or 0 indicating it
206 * set si_state itself.
207 */
3ae0e0f9
CM		 208 int (*oem_data_avail_handler)(struct smi_info *smi_info);
209
c305e3d3
CM		 210 /*
211 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
212 * is set to hold the flags until we are done handling everything
213 * from the flags.
214 */
1da177e4
LT		 215#define RECEIVE_MSG_AVAIL 0x01
216#define EVENT_MSG_BUFFER_FULL 0x02
217#define WDT_PRE_TIMEOUT_INT 0x08
3ae0e0f9
CM		 218#define OEM0_DATA_AVAIL 0x20
219#define OEM1_DATA_AVAIL 0x40
220#define OEM2_DATA_AVAIL 0x80
221#define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
c305e3d3
CM		 222 OEM1_DATA_AVAIL | \
223 OEM2_DATA_AVAIL)
1da177e4
LT		 224 unsigned char msg_flags;
225
40112ae7
CM		 226 /* Does the BMC have an event buffer? */
227 char has_event_buffer;
228
c305e3d3
CM		 229 /*
230 * If set to true, this will request events the next time the
231 * state machine is idle.
232 */
1da177e4
LT		 233 atomic_t req_events;
234
c305e3d3
CM		 235 /*
236 * If true, run the state machine to completion on every send
237 * call. Generally used after a panic to make sure stuff goes
238 * out.
239 */
1da177e4
LT		 240 int run_to_completion;
241
242 /* The I/O port of an SI interface. */
243 int port;
244
c305e3d3
CM		 245 /*
246 * The space between start addresses of the two ports. For
247 * instance, if the first port is 0xca2 and the spacing is 4, then
248 * the second port is 0xca6.
249 */
1da177e4
LT		 250 unsigned int spacing;
251
252 /* zero if no irq; */
253 int irq;
254
255 /* The timer for this si. */
256 struct timer_list si_timer;
257
258 /* The time (in jiffies) the last timeout occurred at. */
259 unsigned long last_timeout_jiffies;
260
261 /* Used to gracefully stop the timer without race conditions. */
a9a2c44f 262 atomic_t stop_operation;
1da177e4 263
c305e3d3
CM		 264 /*
265 * The driver will disable interrupts when it gets into a
266 * situation where it cannot handle messages due to lack of
267 * memory. Once that situation clears up, it will re-enable
268 * interrupts.
269 */
1da177e4
LT		 270 int interrupt_disabled;
271
50c812b2 272 /* From the get device id response... */
3ae0e0f9 273 struct ipmi_device_id device_id;
1da177e4 274
50c812b2
CM		 275 /* Driver model stuff. */
276 struct device *dev;
277 struct platform_device *pdev;
278
c305e3d3
CM		 279 /*
280 * True if we allocated the device, false if it came from
281 * someplace else (like PCI).
282 */
50c812b2
CM		 283 int dev_registered;
284
1da177e4
LT		 285 /* Slave address, could be reported from DMI. */
286 unsigned char slave_addr;
287
288 /* Counters and things for the proc filesystem. */
64959e2d 289 atomic_t stats[SI_NUM_STATS];
a9a2c44f 290
c305e3d3 291 struct task_struct *thread;
b0defcdb
CM		 292
293 struct list_head link;
1da177e4
LT		 294};
295
64959e2d
CM		 296#define smi_inc_stat(smi, stat) \
297 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
298#define smi_get_stat(smi, stat) \
299 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
300
a51f4a81
CM		 301#define SI_MAX_PARMS 4
302
303static int force_kipmid[SI_MAX_PARMS];
304static int num_force_kipmid;
56480287
MG		 305#ifdef CONFIG_PCI
306static int pci_registered;
307#endif
308#ifdef CONFIG_PPC_OF
309static int of_registered;
310#endif
a51f4a81 311
ae74e823
MW		 312static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
313static int num_max_busy_us;
314
b361e27b
CM		 315static int unload_when_empty = 1;
316
2407d77a 317static int add_smi(struct smi_info *smi);
b0defcdb 318static int try_smi_init(struct smi_info *smi);
b361e27b 319static void cleanup_one_si(struct smi_info *to_clean);
b0defcdb 320
e041c683 321static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
c305e3d3 322static int register_xaction_notifier(struct notifier_block *nb)
ea94027b 323{
e041c683 324 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
ea94027b
CM		 325}
326
1da177e4
LT		 327static void deliver_recv_msg(struct smi_info *smi_info,
328 struct ipmi_smi_msg *msg)
329{
330 /* Deliver the message to the upper layer with the lock
c305e3d3 331 released. */
a747c5ab
JK		 332
333 if (smi_info->run_to_completion) {
334 ipmi_smi_msg_received(smi_info->intf, msg);
335 } else {
336 spin_unlock(&(smi_info->si_lock));
337 ipmi_smi_msg_received(smi_info->intf, msg);
338 spin_lock(&(smi_info->si_lock));
339 }
1da177e4
LT		 340}
341
4d7cbac7 342static void return_hosed_msg(struct smi_info *smi_info, int cCode)
1da177e4
LT		 343{
344 struct ipmi_smi_msg *msg = smi_info->curr_msg;
345
4d7cbac7
CM		 346 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
347 cCode = IPMI_ERR_UNSPECIFIED;
348 /* else use it as is */
349
1da177e4
LT		 350 /* Make it a reponse */
351 msg->rsp[0] = msg->data[0] | 4;
352 msg->rsp[1] = msg->data[1];
4d7cbac7 353 msg->rsp[2] = cCode;
1da177e4
LT		 354 msg->rsp_size = 3;
355
356 smi_info->curr_msg = NULL;
357 deliver_recv_msg(smi_info, msg);
358}
359
360static enum si_sm_result start_next_msg(struct smi_info *smi_info)
361{
362 int rv;
363 struct list_head *entry = NULL;
364#ifdef DEBUG_TIMING
365 struct timeval t;
366#endif
367
c305e3d3
CM		 368 /*
369 * No need to save flags, we aleady have interrupts off and we
370 * already hold the SMI lock.
371 */
5956dce1
KB		 372 if (!smi_info->run_to_completion)
373 spin_lock(&(smi_info->msg_lock));
1da177e4
LT		 374
375 /* Pick the high priority queue first. */
b0defcdb 376 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
1da177e4 377 entry = smi_info->hp_xmit_msgs.next;
b0defcdb 378 } else if (!list_empty(&(smi_info->xmit_msgs))) {
1da177e4
LT		 379 entry = smi_info->xmit_msgs.next;
380 }
381
b0defcdb 382 if (!entry) {
1da177e4
LT		 383 smi_info->curr_msg = NULL;
384 rv = SI_SM_IDLE;
385 } else {
386 int err;
387
388 list_del(entry);
389 smi_info->curr_msg = list_entry(entry,
390 struct ipmi_smi_msg,
391 link);
392#ifdef DEBUG_TIMING
393 do_gettimeofday(&t);
c305e3d3 394 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4 395#endif
e041c683
AS		 396 err = atomic_notifier_call_chain(&xaction_notifier_list,
397 0, smi_info);
ea94027b
CM		 398 if (err & NOTIFY_STOP_MASK) {
399 rv = SI_SM_CALL_WITHOUT_DELAY;
400 goto out;
401 }
1da177e4
LT		 402 err = smi_info->handlers->start_transaction(
403 smi_info->si_sm,
404 smi_info->curr_msg->data,
405 smi_info->curr_msg->data_size);
c305e3d3 406 if (err)
4d7cbac7 407 return_hosed_msg(smi_info, err);
1da177e4
LT		 408
409 rv = SI_SM_CALL_WITHOUT_DELAY;
410 }
c305e3d3 411 out:
5956dce1
KB		 412 if (!smi_info->run_to_completion)
413 spin_unlock(&(smi_info->msg_lock));
1da177e4
LT		 414
415 return rv;
416}
417
418static void start_enable_irq(struct smi_info *smi_info)
419{
420 unsigned char msg[2];
421
c305e3d3
CM		 422 /*
423 * If we are enabling interrupts, we have to tell the
424 * BMC to use them.
425 */
1da177e4
LT		 426 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
427 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
428
429 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
430 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
431}
432
ee6cd5f8
CM		 433static void start_disable_irq(struct smi_info *smi_info)
434{
435 unsigned char msg[2];
436
437 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
438 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
439
440 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
441 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
442}
443
1da177e4
LT		 444static void start_clear_flags(struct smi_info *smi_info)
445{
446 unsigned char msg[3];
447
448 /* Make sure the watchdog pre-timeout flag is not set at startup. */
449 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
450 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
451 msg[2] = WDT_PRE_TIMEOUT_INT;
452
453 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
454 smi_info->si_state = SI_CLEARING_FLAGS;
455}
456
c305e3d3
CM		 457/*
458 * When we have a situtaion where we run out of memory and cannot
459 * allocate messages, we just leave them in the BMC and run the system
460 * polled until we can allocate some memory. Once we have some
461 * memory, we will re-enable the interrupt.
462 */
1da177e4
LT		 463static inline void disable_si_irq(struct smi_info *smi_info)
464{
b0defcdb 465 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
ee6cd5f8 466 start_disable_irq(smi_info);
1da177e4 467 smi_info->interrupt_disabled = 1;
ea4078ca
MG		 468 if (!atomic_read(&smi_info->stop_operation))
469 mod_timer(&smi_info->si_timer,
470 jiffies + SI_TIMEOUT_JIFFIES);
1da177e4
LT		 471 }
472}
473
474static inline void enable_si_irq(struct smi_info *smi_info)
475{
476 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
ee6cd5f8 477 start_enable_irq(smi_info);
1da177e4
LT		 478 smi_info->interrupt_disabled = 0;
479 }
480}
481
482static void handle_flags(struct smi_info *smi_info)
483{
3ae0e0f9 484 retry:
1da177e4
LT		 485 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
486 /* Watchdog pre-timeout */
64959e2d 487 smi_inc_stat(smi_info, watchdog_pretimeouts);
1da177e4
LT		 488
489 start_clear_flags(smi_info);
490 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
491 spin_unlock(&(smi_info->si_lock));
492 ipmi_smi_watchdog_pretimeout(smi_info->intf);
493 spin_lock(&(smi_info->si_lock));
494 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
495 /* Messages available. */
496 smi_info->curr_msg = ipmi_alloc_smi_msg();
b0defcdb 497 if (!smi_info->curr_msg) {
1da177e4
LT		 498 disable_si_irq(smi_info);
499 smi_info->si_state = SI_NORMAL;
500 return;
501 }
502 enable_si_irq(smi_info);
503
504 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
505 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
506 smi_info->curr_msg->data_size = 2;
507
508 smi_info->handlers->start_transaction(
509 smi_info->si_sm,
510 smi_info->curr_msg->data,
511 smi_info->curr_msg->data_size);
512 smi_info->si_state = SI_GETTING_MESSAGES;
513 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
514 /* Events available. */
515 smi_info->curr_msg = ipmi_alloc_smi_msg();
b0defcdb 516 if (!smi_info->curr_msg) {
1da177e4
LT		 517 disable_si_irq(smi_info);
518 smi_info->si_state = SI_NORMAL;
519 return;
520 }
521 enable_si_irq(smi_info);
522
523 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
524 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
525 smi_info->curr_msg->data_size = 2;
526
527 smi_info->handlers->start_transaction(
528 smi_info->si_sm,
529 smi_info->curr_msg->data,
530 smi_info->curr_msg->data_size);
531 smi_info->si_state = SI_GETTING_EVENTS;
4064d5ef 532 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
c305e3d3 533 smi_info->oem_data_avail_handler) {
4064d5ef
CM		 534 if (smi_info->oem_data_avail_handler(smi_info))
535 goto retry;
c305e3d3 536 } else
1da177e4 537 smi_info->si_state = SI_NORMAL;
1da177e4
LT		 538}
539
540static void handle_transaction_done(struct smi_info *smi_info)
541{
542 struct ipmi_smi_msg *msg;
543#ifdef DEBUG_TIMING
544 struct timeval t;
545
546 do_gettimeofday(&t);
c305e3d3 547 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 548#endif
549 switch (smi_info->si_state) {
550 case SI_NORMAL:
b0defcdb 551 if (!smi_info->curr_msg)
1da177e4
LT		 552 break;
553
554 smi_info->curr_msg->rsp_size
555 = smi_info->handlers->get_result(
556 smi_info->si_sm,
557 smi_info->curr_msg->rsp,
558 IPMI_MAX_MSG_LENGTH);
559
c305e3d3
CM		 560 /*
561 * Do this here becase deliver_recv_msg() releases the
562 * lock, and a new message can be put in during the
563 * time the lock is released.
564 */
1da177e4
LT		 565 msg = smi_info->curr_msg;
566 smi_info->curr_msg = NULL;
567 deliver_recv_msg(smi_info, msg);
568 break;
569
570 case SI_GETTING_FLAGS:
571 {
572 unsigned char msg[4];
573 unsigned int len;
574
575 /* We got the flags from the SMI, now handle them. */
576 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
577 if (msg[2] != 0) {
c305e3d3 578 /* Error fetching flags, just give up for now. */
1da177e4
LT		 579 smi_info->si_state = SI_NORMAL;
580 } else if (len < 4) {
c305e3d3
CM		 581 /*
582 * Hmm, no flags. That's technically illegal, but
583 * don't use uninitialized data.
584 */
1da177e4
LT		 585 smi_info->si_state = SI_NORMAL;
586 } else {
587 smi_info->msg_flags = msg[3];
588 handle_flags(smi_info);
589 }
590 break;
591 }
592
593 case SI_CLEARING_FLAGS:
594 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
595 {
596 unsigned char msg[3];
597
598 /* We cleared the flags. */
599 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
600 if (msg[2] != 0) {
601 /* Error clearing flags */
279fbd0c
MS		 602 dev_warn(smi_info->dev,
603 "Error clearing flags: %2.2x\n", msg[2]);
1da177e4
LT		 604 }
605 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
606 start_enable_irq(smi_info);
607 else
608 smi_info->si_state = SI_NORMAL;
609 break;
610 }
611
612 case SI_GETTING_EVENTS:
613 {
614 smi_info->curr_msg->rsp_size
615 = smi_info->handlers->get_result(
616 smi_info->si_sm,
617 smi_info->curr_msg->rsp,
618 IPMI_MAX_MSG_LENGTH);
619
c305e3d3
CM		 620 /*
621 * Do this here becase deliver_recv_msg() releases the
622 * lock, and a new message can be put in during the
623 * time the lock is released.
624 */
1da177e4
LT		 625 msg = smi_info->curr_msg;
626 smi_info->curr_msg = NULL;
627 if (msg->rsp[2] != 0) {
628 /* Error getting event, probably done. */
629 msg->done(msg);
630
631 /* Take off the event flag. */
632 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
633 handle_flags(smi_info);
634 } else {
64959e2d 635 smi_inc_stat(smi_info, events);
1da177e4 636
c305e3d3
CM		 637 /*
638 * Do this before we deliver the message
639 * because delivering the message releases the
640 * lock and something else can mess with the
641 * state.
642 */
1da177e4
LT		 643 handle_flags(smi_info);
644
645 deliver_recv_msg(smi_info, msg);
646 }
647 break;
648 }
649
650 case SI_GETTING_MESSAGES:
651 {
652 smi_info->curr_msg->rsp_size
653 = smi_info->handlers->get_result(
654 smi_info->si_sm,
655 smi_info->curr_msg->rsp,
656 IPMI_MAX_MSG_LENGTH);
657
c305e3d3
CM		 658 /*
659 * Do this here becase deliver_recv_msg() releases the
660 * lock, and a new message can be put in during the
661 * time the lock is released.
662 */
1da177e4
LT		 663 msg = smi_info->curr_msg;
664 smi_info->curr_msg = NULL;
665 if (msg->rsp[2] != 0) {
666 /* Error getting event, probably done. */
667 msg->done(msg);
668
669 /* Take off the msg flag. */
670 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
671 handle_flags(smi_info);
672 } else {
64959e2d 673 smi_inc_stat(smi_info, incoming_messages);
1da177e4 674
c305e3d3
CM		 675 /*
676 * Do this before we deliver the message
677 * because delivering the message releases the
678 * lock and something else can mess with the
679 * state.
680 */
1da177e4
LT		 681 handle_flags(smi_info);
682
683 deliver_recv_msg(smi_info, msg);
684 }
685 break;
686 }
687
688 case SI_ENABLE_INTERRUPTS1:
689 {
690 unsigned char msg[4];
691
692 /* We got the flags from the SMI, now handle them. */
693 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
694 if (msg[2] != 0) {
279fbd0c
MS		 695 dev_warn(smi_info->dev, "Could not enable interrupts"
696 ", failed get, using polled mode.\n");
1da177e4
LT		 697 smi_info->si_state = SI_NORMAL;
698 } else {
699 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
700 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
ee6cd5f8
CM		 701 msg[2] = (msg[3] |
702 IPMI_BMC_RCV_MSG_INTR |
703 IPMI_BMC_EVT_MSG_INTR);
1da177e4
LT		 704 smi_info->handlers->start_transaction(
705 smi_info->si_sm, msg, 3);
706 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
707 }
708 break;
709 }
710
711 case SI_ENABLE_INTERRUPTS2:
712 {
713 unsigned char msg[4];
714
715 /* We got the flags from the SMI, now handle them. */
716 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
279fbd0c
MS		 717 if (msg[2] != 0)
718 dev_warn(smi_info->dev, "Could not enable interrupts"
719 ", failed set, using polled mode.\n");
720 else
ea4078ca 721 smi_info->interrupt_disabled = 0;
1da177e4
LT		 722 smi_info->si_state = SI_NORMAL;
723 break;
724 }
ee6cd5f8
CM		 725
726 case SI_DISABLE_INTERRUPTS1:
727 {
728 unsigned char msg[4];
729
730 /* We got the flags from the SMI, now handle them. */
731 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
732 if (msg[2] != 0) {
279fbd0c
MS		 733 dev_warn(smi_info->dev, "Could not disable interrupts"
734 ", failed get.\n");
ee6cd5f8
CM		 735 smi_info->si_state = SI_NORMAL;
736 } else {
737 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
738 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
739 msg[2] = (msg[3] &
740 ~(IPMI_BMC_RCV_MSG_INTR |
741 IPMI_BMC_EVT_MSG_INTR));
742 smi_info->handlers->start_transaction(
743 smi_info->si_sm, msg, 3);
744 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
745 }
746 break;
747 }
748
749 case SI_DISABLE_INTERRUPTS2:
750 {
751 unsigned char msg[4];
752
753 /* We got the flags from the SMI, now handle them. */
754 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
755 if (msg[2] != 0) {
279fbd0c
MS		 756 dev_warn(smi_info->dev, "Could not disable interrupts"
757 ", failed set.\n");
ee6cd5f8
CM		 758 }
759 smi_info->si_state = SI_NORMAL;
760 break;
761 }
1da177e4
LT		 762 }
763}
764
c305e3d3
CM		 765/*
766 * Called on timeouts and events. Timeouts should pass the elapsed
767 * time, interrupts should pass in zero. Must be called with
768 * si_lock held and interrupts disabled.
769 */
1da177e4
LT		 770static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
771 int time)
772{
773 enum si_sm_result si_sm_result;
774
775 restart:
c305e3d3
CM		 776 /*
777 * There used to be a loop here that waited a little while
778 * (around 25us) before giving up. That turned out to be
779 * pointless, the minimum delays I was seeing were in the 300us
780 * range, which is far too long to wait in an interrupt. So
781 * we just run until the state machine tells us something
782 * happened or it needs a delay.
783 */
1da177e4
LT		 784 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
785 time = 0;
786 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
1da177e4 787 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
1da177e4 788
c305e3d3 789 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
64959e2d 790 smi_inc_stat(smi_info, complete_transactions);
1da177e4
LT		 791
792 handle_transaction_done(smi_info);
793 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
c305e3d3 794 } else if (si_sm_result == SI_SM_HOSED) {
64959e2d 795 smi_inc_stat(smi_info, hosed_count);
1da177e4 796
c305e3d3
CM		 797 /*
798 * Do the before return_hosed_msg, because that
799 * releases the lock.
800 */
1da177e4
LT		 801 smi_info->si_state = SI_NORMAL;
802 if (smi_info->curr_msg != NULL) {
c305e3d3
CM		 803 /*
804 * If we were handling a user message, format
805 * a response to send to the upper layer to
806 * tell it about the error.
807 */
4d7cbac7 808 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
1da177e4
LT		 809 }
810 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
811 }
812
4ea18425
CM		 813 /*
814 * We prefer handling attn over new messages. But don't do
815 * this if there is not yet an upper layer to handle anything.
816 */
c305e3d3 817 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
1da177e4
LT		 818 unsigned char msg[2];
819
64959e2d 820 smi_inc_stat(smi_info, attentions);
1da177e4 821
c305e3d3
CM		 822 /*
823 * Got a attn, send down a get message flags to see
824 * what's causing it. It would be better to handle
825 * this in the upper layer, but due to the way
826 * interrupts work with the SMI, that's not really
827 * possible.
828 */
1da177e4
LT		 829 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
830 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
831
832 smi_info->handlers->start_transaction(
833 smi_info->si_sm, msg, 2);
834 smi_info->si_state = SI_GETTING_FLAGS;
835 goto restart;
836 }
837
838 /* If we are currently idle, try to start the next message. */
839 if (si_sm_result == SI_SM_IDLE) {
64959e2d 840 smi_inc_stat(smi_info, idles);
1da177e4
LT		 841
842 si_sm_result = start_next_msg(smi_info);
843 if (si_sm_result != SI_SM_IDLE)
844 goto restart;
c305e3d3 845 }
1da177e4
LT		 846
847 if ((si_sm_result == SI_SM_IDLE)
c305e3d3
CM		 848 && (atomic_read(&smi_info->req_events))) {
849 /*
850 * We are idle and the upper layer requested that I fetch
851 * events, so do so.
852 */
55162fb1 853 atomic_set(&smi_info->req_events, 0);
1da177e4 854
55162fb1
CM		 855 smi_info->curr_msg = ipmi_alloc_smi_msg();
856 if (!smi_info->curr_msg)
857 goto out;
1da177e4 858
55162fb1
CM		 859 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
860 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
861 smi_info->curr_msg->data_size = 2;
1da177e4
LT		 862
863 smi_info->handlers->start_transaction(
55162fb1
CM		 864 smi_info->si_sm,
865 smi_info->curr_msg->data,
866 smi_info->curr_msg->data_size);
867 smi_info->si_state = SI_GETTING_EVENTS;
1da177e4
LT		 868 goto restart;
869 }
55162fb1 870 out:
1da177e4
LT		 871 return si_sm_result;
872}
873
874static void sender(void *send_info,
875 struct ipmi_smi_msg *msg,
876 int priority)
877{
878 struct smi_info *smi_info = send_info;
879 enum si_sm_result result;
880 unsigned long flags;
881#ifdef DEBUG_TIMING
882 struct timeval t;
883#endif
884
b361e27b
CM		 885 if (atomic_read(&smi_info->stop_operation)) {
886 msg->rsp[0] = msg->data[0] | 4;
887 msg->rsp[1] = msg->data[1];
888 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
889 msg->rsp_size = 3;
890 deliver_recv_msg(smi_info, msg);
891 return;
892 }
893
1da177e4
LT		 894#ifdef DEBUG_TIMING
895 do_gettimeofday(&t);
896 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
897#endif
898
ea4078ca
MG		 899 mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
900
3326f4f2
MG		 901 if (smi_info->thread)
902 wake_up_process(smi_info->thread);
903
1da177e4 904 if (smi_info->run_to_completion) {
bda4c30a
CM		 905 /*
906 * If we are running to completion, then throw it in
907 * the list and run transactions until everything is
908 * clear. Priority doesn't matter here.
909 */
910
911 /*
912 * Run to completion means we are single-threaded, no
913 * need for locks.
914 */
1da177e4
LT		 915 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
916
1da177e4
LT		 917 result = smi_event_handler(smi_info, 0);
918 while (result != SI_SM_IDLE) {
919 udelay(SI_SHORT_TIMEOUT_USEC);
920 result = smi_event_handler(smi_info,
921 SI_SHORT_TIMEOUT_USEC);
922 }
1da177e4 923 return;
1da177e4 924 }
1da177e4 925
bda4c30a
CM		 926 spin_lock_irqsave(&smi_info->msg_lock, flags);
927 if (priority > 0)
928 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
929 else
930 list_add_tail(&msg->link, &smi_info->xmit_msgs);
931 spin_unlock_irqrestore(&smi_info->msg_lock, flags);
932
933 spin_lock_irqsave(&smi_info->si_lock, flags);
c305e3d3 934 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL)
1da177e4 935 start_next_msg(smi_info);
bda4c30a 936 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1da177e4
LT		 937}
938
939static void set_run_to_completion(void *send_info, int i_run_to_completion)
940{
941 struct smi_info *smi_info = send_info;
942 enum si_sm_result result;
1da177e4
LT		 943
944 smi_info->run_to_completion = i_run_to_completion;
945 if (i_run_to_completion) {
946 result = smi_event_handler(smi_info, 0);
947 while (result != SI_SM_IDLE) {
948 udelay(SI_SHORT_TIMEOUT_USEC);
949 result = smi_event_handler(smi_info,
950 SI_SHORT_TIMEOUT_USEC);
951 }
952 }
1da177e4
LT		 953}
954
ae74e823
MW		 955/*
956 * Use -1 in the nsec value of the busy waiting timespec to tell that
957 * we are spinning in kipmid looking for something and not delaying
958 * between checks
959 */
960static inline void ipmi_si_set_not_busy(struct timespec *ts)
961{
962 ts->tv_nsec = -1;
963}
964static inline int ipmi_si_is_busy(struct timespec *ts)
965{
966 return ts->tv_nsec != -1;
967}
968
969static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
970 const struct smi_info *smi_info,
971 struct timespec *busy_until)
972{
973 unsigned int max_busy_us = 0;
974
975 if (smi_info->intf_num < num_max_busy_us)
976 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
977 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
978 ipmi_si_set_not_busy(busy_until);
979 else if (!ipmi_si_is_busy(busy_until)) {
980 getnstimeofday(busy_until);
981 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
982 } else {
983 struct timespec now;
984 getnstimeofday(&now);
985 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
986 ipmi_si_set_not_busy(busy_until);
987 return 0;
988 }
989 }
990 return 1;
991}
992
993
994/*
995 * A busy-waiting loop for speeding up IPMI operation.
996 *
997 * Lousy hardware makes this hard. This is only enabled for systems
998 * that are not BT and do not have interrupts. It starts spinning
999 * when an operation is complete or until max_busy tells it to stop
1000 * (if that is enabled). See the paragraph on kimid_max_busy_us in
1001 * Documentation/IPMI.txt for details.
1002 */
a9a2c44f
CM		 1003static int ipmi_thread(void *data)
1004{
1005 struct smi_info *smi_info = data;
e9a705a0 1006 unsigned long flags;
a9a2c44f 1007 enum si_sm_result smi_result;
ae74e823 1008 struct timespec busy_until;
a9a2c44f 1009
ae74e823 1010 ipmi_si_set_not_busy(&busy_until);
a9a2c44f 1011 set_user_nice(current, 19);
e9a705a0 1012 while (!kthread_should_stop()) {
ae74e823
MW		 1013 int busy_wait;
1014
a9a2c44f 1015 spin_lock_irqsave(&(smi_info->si_lock), flags);
8a3628d5 1016 smi_result = smi_event_handler(smi_info, 0);
a9a2c44f 1017 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
ae74e823
MW		 1018 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
1019 &busy_until);
c305e3d3
CM		 1020 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1021 ; /* do nothing */
ae74e823 1022 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
33979734 1023 schedule();
3326f4f2
MG		 1024 else if (smi_result == SI_SM_IDLE)
1025 schedule_timeout_interruptible(100);
e9a705a0 1026 else
8d1f66dc 1027 schedule_timeout_interruptible(1);
a9a2c44f 1028 }
a9a2c44f
CM		 1029 return 0;
1030}
1031
1032
1da177e4
LT		 1033static void poll(void *send_info)
1034{
1035 struct smi_info *smi_info = send_info;
fcfa4724 1036 unsigned long flags;
1da177e4 1037
15c62e10
CM		 1038 /*
1039 * Make sure there is some delay in the poll loop so we can
1040 * drive time forward and timeout things.
1041 */
1042 udelay(10);
fcfa4724 1043 spin_lock_irqsave(&smi_info->si_lock, flags);
15c62e10 1044 smi_event_handler(smi_info, 10);
fcfa4724 1045 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1da177e4
LT		 1046}
1047
1048static void request_events(void *send_info)
1049{
1050 struct smi_info *smi_info = send_info;
1051
40112ae7
CM		 1052 if (atomic_read(&smi_info->stop_operation) ||
1053 !smi_info->has_event_buffer)
b361e27b
CM		 1054 return;
1055
1da177e4
LT		 1056 atomic_set(&smi_info->req_events, 1);
1057}
1058
0c8204b3 1059static int initialized;
1da177e4 1060
1da177e4
LT		 1061static void smi_timeout(unsigned long data)
1062{
1063 struct smi_info *smi_info = (struct smi_info *) data;
1064 enum si_sm_result smi_result;
1065 unsigned long flags;
1066 unsigned long jiffies_now;
c4edff1c 1067 long time_diff;
3326f4f2 1068 long timeout;
1da177e4
LT		 1069#ifdef DEBUG_TIMING
1070 struct timeval t;
1071#endif
1072
1da177e4
LT		 1073 spin_lock_irqsave(&(smi_info->si_lock), flags);
1074#ifdef DEBUG_TIMING
1075 do_gettimeofday(&t);
c305e3d3 1076 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 1077#endif
1078 jiffies_now = jiffies;
c4edff1c 1079 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1da177e4
LT		 1080 * SI_USEC_PER_JIFFY);
1081 smi_result = smi_event_handler(smi_info, time_diff);
1082
1083 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1084
1085 smi_info->last_timeout_jiffies = jiffies_now;
1086
b0defcdb 1087 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1da177e4 1088 /* Running with interrupts, only do long timeouts. */
3326f4f2 1089 timeout = jiffies + SI_TIMEOUT_JIFFIES;
64959e2d 1090 smi_inc_stat(smi_info, long_timeouts);
3326f4f2 1091 goto do_mod_timer;
1da177e4
LT		 1092 }
1093
c305e3d3
CM		 1094 /*
1095 * If the state machine asks for a short delay, then shorten
1096 * the timer timeout.
1097 */
1da177e4 1098 if (smi_result == SI_SM_CALL_WITH_DELAY) {
64959e2d 1099 smi_inc_stat(smi_info, short_timeouts);
3326f4f2 1100 timeout = jiffies + 1;
1da177e4 1101 } else {
64959e2d 1102 smi_inc_stat(smi_info, long_timeouts);
3326f4f2 1103 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1da177e4
LT		 1104 }
1105
3326f4f2
MG		 1106 do_mod_timer:
1107 if (smi_result != SI_SM_IDLE)
1108 mod_timer(&(smi_info->si_timer), timeout);
1da177e4
LT		 1109}
1110
7d12e780 1111static irqreturn_t si_irq_handler(int irq, void *data)
1da177e4
LT		 1112{
1113 struct smi_info *smi_info = data;
1114 unsigned long flags;
1115#ifdef DEBUG_TIMING
1116 struct timeval t;
1117#endif
1118
1119 spin_lock_irqsave(&(smi_info->si_lock), flags);
1120
64959e2d 1121 smi_inc_stat(smi_info, interrupts);
1da177e4 1122
1da177e4
LT		 1123#ifdef DEBUG_TIMING
1124 do_gettimeofday(&t);
c305e3d3 1125 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 1126#endif
1127 smi_event_handler(smi_info, 0);
1da177e4
LT		 1128 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1129 return IRQ_HANDLED;
1130}
1131
7d12e780 1132static irqreturn_t si_bt_irq_handler(int irq, void *data)
9dbf68f9
CM		 1133{
1134 struct smi_info *smi_info = data;
1135 /* We need to clear the IRQ flag for the BT interface. */
1136 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1137 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1138 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
7d12e780 1139 return si_irq_handler(irq, data);
9dbf68f9
CM		 1140}
1141
453823ba
CM		 1142static int smi_start_processing(void *send_info,
1143 ipmi_smi_t intf)
1144{
1145 struct smi_info *new_smi = send_info;
a51f4a81 1146 int enable = 0;
453823ba
CM		 1147
1148 new_smi->intf = intf;
1149
c45adc39
CM		 1150 /* Try to claim any interrupts. */
1151 if (new_smi->irq_setup)
1152 new_smi->irq_setup(new_smi);
1153
453823ba
CM		 1154 /* Set up the timer that drives the interface. */
1155 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1156 new_smi->last_timeout_jiffies = jiffies;
1157 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
1158
a51f4a81
CM		 1159 /*
1160 * Check if the user forcefully enabled the daemon.
1161 */
1162 if (new_smi->intf_num < num_force_kipmid)
1163 enable = force_kipmid[new_smi->intf_num];
df3fe8de
CM		 1164 /*
1165 * The BT interface is efficient enough to not need a thread,
1166 * and there is no need for a thread if we have interrupts.
1167 */
c305e3d3 1168 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
a51f4a81
CM		 1169 enable = 1;
1170
1171 if (enable) {
453823ba
CM		 1172 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1173 "kipmi%d", new_smi->intf_num);
1174 if (IS_ERR(new_smi->thread)) {
279fbd0c
MS		 1175 dev_notice(new_smi->dev, "Could not start"
1176 " kernel thread due to error %ld, only using"
1177 " timers to drive the interface\n",
1178 PTR_ERR(new_smi->thread));
453823ba
CM		 1179 new_smi->thread = NULL;
1180 }
1181 }
1182
1183 return 0;
1184}
9dbf68f9 1185
b9675136
CM		 1186static void set_maintenance_mode(void *send_info, int enable)
1187{
1188 struct smi_info *smi_info = send_info;
1189
1190 if (!enable)
1191 atomic_set(&smi_info->req_events, 0);
1192}
1193
c305e3d3 1194static struct ipmi_smi_handlers handlers = {
1da177e4 1195 .owner = THIS_MODULE,
453823ba 1196 .start_processing = smi_start_processing,
1da177e4
LT		 1197 .sender = sender,
1198 .request_events = request_events,
b9675136 1199 .set_maintenance_mode = set_maintenance_mode,
1da177e4
LT		 1200 .set_run_to_completion = set_run_to_completion,
1201 .poll = poll,
1202};
1203
c305e3d3
CM		 1204/*
1205 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1206 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1207 */
1da177e4 1208
b0defcdb 1209static LIST_HEAD(smi_infos);
d6dfd131 1210static DEFINE_MUTEX(smi_infos_lock);
b0defcdb 1211static int smi_num; /* Used to sequence the SMIs */
1da177e4 1212
1da177e4 1213#define DEFAULT_REGSPACING 1
dba9b4f6 1214#define DEFAULT_REGSIZE 1
1da177e4
LT		 1215
1216static int si_trydefaults = 1;
1217static char *si_type[SI_MAX_PARMS];
1218#define MAX_SI_TYPE_STR 30
1219static char si_type_str[MAX_SI_TYPE_STR];
1220static unsigned long addrs[SI_MAX_PARMS];
64a6f950 1221static unsigned int num_addrs;
1da177e4 1222static unsigned int ports[SI_MAX_PARMS];
64a6f950 1223static unsigned int num_ports;
1da177e4 1224static int irqs[SI_MAX_PARMS];
64a6f950 1225static unsigned int num_irqs;
1da177e4 1226static int regspacings[SI_MAX_PARMS];
64a6f950 1227static unsigned int num_regspacings;
1da177e4 1228static int regsizes[SI_MAX_PARMS];
64a6f950 1229static unsigned int num_regsizes;
1da177e4 1230static int regshifts[SI_MAX_PARMS];
64a6f950 1231static unsigned int num_regshifts;
2f95d513 1232static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
64a6f950 1233static unsigned int num_slave_addrs;
1da177e4 1234
b361e27b
CM		 1235#define IPMI_IO_ADDR_SPACE 0
1236#define IPMI_MEM_ADDR_SPACE 1
1d5636cc 1237static char *addr_space_to_str[] = { "i/o", "mem" };
b361e27b
CM		 1238
1239static int hotmod_handler(const char *val, struct kernel_param *kp);
1240
1241module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1242MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1243 " Documentation/IPMI.txt in the kernel sources for the"
1244 " gory details.");
1da177e4
LT		 1245
1246module_param_named(trydefaults, si_trydefaults, bool, 0);
1247MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1248 " default scan of the KCS and SMIC interface at the standard"
1249 " address");
1250module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1251MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1252 " interface separated by commas. The types are 'kcs',"
1253 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1254 " the first interface to kcs and the second to bt");
64a6f950 1255module_param_array(addrs, ulong, &num_addrs, 0);
1da177e4
LT		 1256MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1257 " addresses separated by commas. Only use if an interface"
1258 " is in memory. Otherwise, set it to zero or leave"
1259 " it blank.");
64a6f950 1260module_param_array(ports, uint, &num_ports, 0);
1da177e4
LT		 1261MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1262 " addresses separated by commas. Only use if an interface"
1263 " is a port. Otherwise, set it to zero or leave"
1264 " it blank.");
1265module_param_array(irqs, int, &num_irqs, 0);
1266MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1267 " addresses separated by commas. Only use if an interface"
1268 " has an interrupt. Otherwise, set it to zero or leave"
1269 " it blank.");
1270module_param_array(regspacings, int, &num_regspacings, 0);
1271MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1272 " and each successive register used by the interface. For"
1273 " instance, if the start address is 0xca2 and the spacing"
1274 " is 2, then the second address is at 0xca4. Defaults"
1275 " to 1.");
1276module_param_array(regsizes, int, &num_regsizes, 0);
1277MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1278 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1279 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1280 " the 8-bit IPMI register has to be read from a larger"
1281 " register.");
1282module_param_array(regshifts, int, &num_regshifts, 0);
1283MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1284 " IPMI register, in bits. For instance, if the data"
1285 " is read from a 32-bit word and the IPMI data is in"
1286 " bit 8-15, then the shift would be 8");
1287module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1288MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1289 " the controller. Normally this is 0x20, but can be"
1290 " overridden by this parm. This is an array indexed"
1291 " by interface number.");
a51f4a81
CM		 1292module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1293MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1294 " disabled(0). Normally the IPMI driver auto-detects"
1295 " this, but the value may be overridden by this parm.");
b361e27b
CM		 1296module_param(unload_when_empty, int, 0);
1297MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1298 " specified or found, default is 1. Setting to 0"
1299 " is useful for hot add of devices using hotmod.");
ae74e823
MW		 1300module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1301MODULE_PARM_DESC(kipmid_max_busy_us,
1302 "Max time (in microseconds) to busy-wait for IPMI data before"
1303 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1304 " if kipmid is using up a lot of CPU time.");
1da177e4
LT		 1305
1306
b0defcdb 1307static void std_irq_cleanup(struct smi_info *info)
1da177e4 1308{
b0defcdb
CM		 1309 if (info->si_type == SI_BT)
1310 /* Disable the interrupt in the BT interface. */
1311 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1312 free_irq(info->irq, info);
1da177e4 1313}
1da177e4
LT		 1314
1315static int std_irq_setup(struct smi_info *info)
1316{
1317 int rv;
1318
b0defcdb 1319 if (!info->irq)
1da177e4
LT		 1320 return 0;
1321
9dbf68f9
CM		 1322 if (info->si_type == SI_BT) {
1323 rv = request_irq(info->irq,
1324 si_bt_irq_handler,
ee6cd5f8 1325 IRQF_SHARED | IRQF_DISABLED,
9dbf68f9
CM		 1326 DEVICE_NAME,
1327 info);
b0defcdb 1328 if (!rv)
9dbf68f9
CM		 1329 /* Enable the interrupt in the BT interface. */
1330 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1331 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1332 } else
1333 rv = request_irq(info->irq,
1334 si_irq_handler,
ee6cd5f8 1335 IRQF_SHARED | IRQF_DISABLED,
9dbf68f9
CM		 1336 DEVICE_NAME,
1337 info);
1da177e4 1338 if (rv) {
279fbd0c
MS		 1339 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1340 " running polled\n",
1341 DEVICE_NAME, info->irq);
1da177e4
LT		 1342 info->irq = 0;
1343 } else {
b0defcdb 1344 info->irq_cleanup = std_irq_cleanup;
279fbd0c 1345 dev_info(info->dev, "Using irq %d\n", info->irq);
1da177e4
LT		 1346 }
1347
1348 return rv;
1349}
1350
1da177e4
LT		 1351static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1352{
b0defcdb 1353 unsigned int addr = io->addr_data;
1da177e4 1354
b0defcdb 1355 return inb(addr + (offset * io->regspacing));
1da177e4
LT		 1356}
1357
1358static void port_outb(struct si_sm_io *io, unsigned int offset,
1359 unsigned char b)
1360{
b0defcdb 1361 unsigned int addr = io->addr_data;
1da177e4 1362
b0defcdb 1363 outb(b, addr + (offset * io->regspacing));
1da177e4
LT		 1364}
1365
1366static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1367{
b0defcdb 1368 unsigned int addr = io->addr_data;
1da177e4 1369
b0defcdb 1370 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1da177e4
LT		 1371}
1372
1373static void port_outw(struct si_sm_io *io, unsigned int offset,
1374 unsigned char b)
1375{
b0defcdb 1376 unsigned int addr = io->addr_data;
1da177e4 1377
b0defcdb 1378 outw(b << io->regshift, addr + (offset * io->regspacing));
1da177e4
LT		 1379}
1380
1381static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1382{
b0defcdb 1383 unsigned int addr = io->addr_data;
1da177e4 1384
b0defcdb 1385 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1da177e4
LT		 1386}
1387
1388static void port_outl(struct si_sm_io *io, unsigned int offset,
1389 unsigned char b)
1390{
b0defcdb 1391 unsigned int addr = io->addr_data;
1da177e4 1392
b0defcdb 1393 outl(b << io->regshift, addr+(offset * io->regspacing));
1da177e4
LT		 1394}
1395
1396static void port_cleanup(struct smi_info *info)
1397{
b0defcdb 1398 unsigned int addr = info->io.addr_data;
d61a3ead 1399 int idx;
1da177e4 1400
b0defcdb 1401 if (addr) {
c305e3d3 1402 for (idx = 0; idx < info->io_size; idx++)
d61a3ead
CM		 1403 release_region(addr + idx * info->io.regspacing,
1404 info->io.regsize);
1da177e4 1405 }
1da177e4
LT		 1406}
1407
1408static int port_setup(struct smi_info *info)
1409{
b0defcdb 1410 unsigned int addr = info->io.addr_data;
d61a3ead 1411 int idx;
1da177e4 1412
b0defcdb 1413 if (!addr)
1da177e4
LT		 1414 return -ENODEV;
1415
1416 info->io_cleanup = port_cleanup;
1417
c305e3d3
CM		 1418 /*
1419 * Figure out the actual inb/inw/inl/etc routine to use based
1420 * upon the register size.
1421 */
1da177e4
LT		 1422 switch (info->io.regsize) {
1423 case 1:
1424 info->io.inputb = port_inb;
1425 info->io.outputb = port_outb;
1426 break;
1427 case 2:
1428 info->io.inputb = port_inw;
1429 info->io.outputb = port_outw;
1430 break;
1431 case 4:
1432 info->io.inputb = port_inl;
1433 info->io.outputb = port_outl;
1434 break;
1435 default:
279fbd0c
MS		 1436 dev_warn(info->dev, "Invalid register size: %d\n",
1437 info->io.regsize);
1da177e4
LT		 1438 return -EINVAL;
1439 }
1440
c305e3d3
CM		 1441 /*
1442 * Some BIOSes reserve disjoint I/O regions in their ACPI
d61a3ead
CM		 1443 * tables. This causes problems when trying to register the
1444 * entire I/O region. Therefore we must register each I/O
1445 * port separately.
1446 */
c305e3d3 1447 for (idx = 0; idx < info->io_size; idx++) {
d61a3ead
CM		 1448 if (request_region(addr + idx * info->io.regspacing,
1449 info->io.regsize, DEVICE_NAME) == NULL) {
1450 /* Undo allocations */
1451 while (idx--) {
1452 release_region(addr + idx * info->io.regspacing,
1453 info->io.regsize);
1454 }
1455 return -EIO;
1456 }
1457 }
1da177e4
LT		 1458 return 0;
1459}
1460
546cfdf4 1461static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1462{
1463 return readb((io->addr)+(offset * io->regspacing));
1464}
1465
546cfdf4 1466static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1467 unsigned char b)
1468{
1469 writeb(b, (io->addr)+(offset * io->regspacing));
1470}
1471
546cfdf4 1472static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1473{
1474 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1475 & 0xff;
1da177e4
LT		 1476}
1477
546cfdf4 1478static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1479 unsigned char b)
1480{
1481 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1482}
1483
546cfdf4 1484static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1485{
1486 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1487 & 0xff;
1da177e4
LT		 1488}
1489
546cfdf4 1490static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1491 unsigned char b)
1492{
1493 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1494}
1495
1496#ifdef readq
1497static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1498{
1499 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1500 & 0xff;
1da177e4
LT		 1501}
1502
1503static void mem_outq(struct si_sm_io *io, unsigned int offset,
1504 unsigned char b)
1505{
1506 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1507}
1508#endif
1509
1510static void mem_cleanup(struct smi_info *info)
1511{
b0defcdb 1512 unsigned long addr = info->io.addr_data;
1da177e4
LT		 1513 int mapsize;
1514
1515 if (info->io.addr) {
1516 iounmap(info->io.addr);
1517
1518 mapsize = ((info->io_size * info->io.regspacing)
1519 - (info->io.regspacing - info->io.regsize));
1520
b0defcdb 1521 release_mem_region(addr, mapsize);
1da177e4 1522 }
1da177e4
LT		 1523}
1524
1525static int mem_setup(struct smi_info *info)
1526{
b0defcdb 1527 unsigned long addr = info->io.addr_data;
1da177e4
LT		 1528 int mapsize;
1529
b0defcdb 1530 if (!addr)
1da177e4
LT		 1531 return -ENODEV;
1532
1533 info->io_cleanup = mem_cleanup;
1534
c305e3d3
CM		 1535 /*
1536 * Figure out the actual readb/readw/readl/etc routine to use based
1537 * upon the register size.
1538 */
1da177e4
LT		 1539 switch (info->io.regsize) {
1540 case 1:
546cfdf4
AD		 1541 info->io.inputb = intf_mem_inb;
1542 info->io.outputb = intf_mem_outb;
1da177e4
LT		 1543 break;
1544 case 2:
546cfdf4
AD		 1545 info->io.inputb = intf_mem_inw;
1546 info->io.outputb = intf_mem_outw;
1da177e4
LT		 1547 break;
1548 case 4:
546cfdf4
AD		 1549 info->io.inputb = intf_mem_inl;
1550 info->io.outputb = intf_mem_outl;
1da177e4
LT		 1551 break;
1552#ifdef readq
1553 case 8:
1554 info->io.inputb = mem_inq;
1555 info->io.outputb = mem_outq;
1556 break;
1557#endif
1558 default:
279fbd0c
MS		 1559 dev_warn(info->dev, "Invalid register size: %d\n",
1560 info->io.regsize);
1da177e4
LT		 1561 return -EINVAL;
1562 }
1563
c305e3d3
CM		 1564 /*
1565 * Calculate the total amount of memory to claim. This is an
1da177e4
LT		 1566 * unusual looking calculation, but it avoids claiming any
1567 * more memory than it has to. It will claim everything
1568 * between the first address to the end of the last full
c305e3d3
CM		 1569 * register.
1570 */
1da177e4
LT		 1571 mapsize = ((info->io_size * info->io.regspacing)
1572 - (info->io.regspacing - info->io.regsize));
1573
b0defcdb 1574 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1da177e4
LT		 1575 return -EIO;
1576
b0defcdb 1577 info->io.addr = ioremap(addr, mapsize);
1da177e4 1578 if (info->io.addr == NULL) {
b0defcdb 1579 release_mem_region(addr, mapsize);
1da177e4
LT		 1580 return -EIO;
1581 }
1582 return 0;
1583}
1584
b361e27b
CM		 1585/*
1586 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1587 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1588 * Options are:
1589 * rsp=<regspacing>
1590 * rsi=<regsize>
1591 * rsh=<regshift>
1592 * irq=<irq>
1593 * ipmb=<ipmb addr>
1594 */
1595enum hotmod_op { HM_ADD, HM_REMOVE };
1596struct hotmod_vals {
1597 char *name;
1598 int val;
1599};
1600static struct hotmod_vals hotmod_ops[] = {
1601 { "add", HM_ADD },
1602 { "remove", HM_REMOVE },
1603 { NULL }
1604};
1605static struct hotmod_vals hotmod_si[] = {
1606 { "kcs", SI_KCS },
1607 { "smic", SI_SMIC },
1608 { "bt", SI_BT },
1609 { NULL }
1610};
1611static struct hotmod_vals hotmod_as[] = {
1612 { "mem", IPMI_MEM_ADDR_SPACE },
1613 { "i/o", IPMI_IO_ADDR_SPACE },
1614 { NULL }
1615};
1d5636cc 1616
b361e27b
CM		 1617static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1618{
1619 char *s;
1620 int i;
1621
1622 s = strchr(*curr, ',');
1623 if (!s) {
1624 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1625 return -EINVAL;
1626 }
1627 *s = '\0';
1628 s++;
1629 for (i = 0; hotmod_ops[i].name; i++) {
1d5636cc 1630 if (strcmp(*curr, v[i].name) == 0) {
b361e27b
CM		 1631 *val = v[i].val;
1632 *curr = s;
1633 return 0;
1634 }
1635 }
1636
1637 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1638 return -EINVAL;
1639}
1640
1d5636cc
CM		 1641static int check_hotmod_int_op(const char *curr, const char *option,
1642 const char *name, int *val)
1643{
1644 char *n;
1645
1646 if (strcmp(curr, name) == 0) {
1647 if (!option) {
1648 printk(KERN_WARNING PFX
1649 "No option given for '%s'\n",
1650 curr);
1651 return -EINVAL;
1652 }
1653 *val = simple_strtoul(option, &n, 0);
1654 if ((*n != '\0') || (*option == '\0')) {
1655 printk(KERN_WARNING PFX
1656 "Bad option given for '%s'\n",
1657 curr);
1658 return -EINVAL;
1659 }
1660 return 1;
1661 }
1662 return 0;
1663}
1664
b361e27b
CM		 1665static int hotmod_handler(const char *val, struct kernel_param *kp)
1666{
1667 char *str = kstrdup(val, GFP_KERNEL);
1d5636cc 1668 int rv;
b361e27b
CM		 1669 char *next, *curr, *s, *n, *o;
1670 enum hotmod_op op;
1671 enum si_type si_type;
1672 int addr_space;
1673 unsigned long addr;
1674 int regspacing;
1675 int regsize;
1676 int regshift;
1677 int irq;
1678 int ipmb;
1679 int ival;
1d5636cc 1680 int len;
b361e27b
CM		 1681 struct smi_info *info;
1682
1683 if (!str)
1684 return -ENOMEM;
1685
1686 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1d5636cc
CM		 1687 len = strlen(str);
1688 ival = len - 1;
b361e27b
CM		 1689 while ((ival >= 0) && isspace(str[ival])) {
1690 str[ival] = '\0';
1691 ival--;
1692 }
1693
1694 for (curr = str; curr; curr = next) {
1695 regspacing = 1;
1696 regsize = 1;
1697 regshift = 0;
1698 irq = 0;
2f95d513 1699 ipmb = 0; /* Choose the default if not specified */
b361e27b
CM		 1700
1701 next = strchr(curr, ':');
1702 if (next) {
1703 *next = '\0';
1704 next++;
1705 }
1706
1707 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1708 if (rv)
1709 break;
1710 op = ival;
1711
1712 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1713 if (rv)
1714 break;
1715 si_type = ival;
1716
1717 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1718 if (rv)
1719 break;
1720
1721 s = strchr(curr, ',');
1722 if (s) {
1723 *s = '\0';
1724 s++;
1725 }
1726 addr = simple_strtoul(curr, &n, 0);
1727 if ((*n != '\0') || (*curr == '\0')) {
1728 printk(KERN_WARNING PFX "Invalid hotmod address"
1729 " '%s'\n", curr);
1730 break;
1731 }
1732
1733 while (s) {
1734 curr = s;
1735 s = strchr(curr, ',');
1736 if (s) {
1737 *s = '\0';
1738 s++;
1739 }
1740 o = strchr(curr, '=');
1741 if (o) {
1742 *o = '\0';
1743 o++;
1744 }
1d5636cc
CM		 1745 rv = check_hotmod_int_op(curr, o, "rsp", &regspacing);
1746 if (rv < 0)
b361e27b 1747 goto out;
1d5636cc
CM		 1748 else if (rv)
1749 continue;
1750 rv = check_hotmod_int_op(curr, o, "rsi", &regsize);
1751 if (rv < 0)
1752 goto out;
1753 else if (rv)
1754 continue;
1755 rv = check_hotmod_int_op(curr, o, "rsh", &regshift);
1756 if (rv < 0)
1757 goto out;
1758 else if (rv)
1759 continue;
1760 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1761 if (rv < 0)
1762 goto out;
1763 else if (rv)
1764 continue;
1765 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1766 if (rv < 0)
1767 goto out;
1768 else if (rv)
1769 continue;
1770
1771 rv = -EINVAL;
1772 printk(KERN_WARNING PFX
1773 "Invalid hotmod option '%s'\n",
1774 curr);
1775 goto out;
b361e27b
CM		 1776 }
1777
1778 if (op == HM_ADD) {
1779 info = kzalloc(sizeof(*info), GFP_KERNEL);
1780 if (!info) {
1781 rv = -ENOMEM;
1782 goto out;
1783 }
1784
5fedc4a2 1785 info->addr_source = SI_HOTMOD;
b361e27b
CM		 1786 info->si_type = si_type;
1787 info->io.addr_data = addr;
1788 info->io.addr_type = addr_space;
1789 if (addr_space == IPMI_MEM_ADDR_SPACE)
1790 info->io_setup = mem_setup;
1791 else
1792 info->io_setup = port_setup;
1793
1794 info->io.addr = NULL;
1795 info->io.regspacing = regspacing;
1796 if (!info->io.regspacing)
1797 info->io.regspacing = DEFAULT_REGSPACING;
1798 info->io.regsize = regsize;
1799 if (!info->io.regsize)
1800 info->io.regsize = DEFAULT_REGSPACING;
1801 info->io.regshift = regshift;
1802 info->irq = irq;
1803 if (info->irq)
1804 info->irq_setup = std_irq_setup;
1805 info->slave_addr = ipmb;
1806
7faefea6 1807 if (!add_smi(info)) {
2407d77a
MG		 1808 if (try_smi_init(info))
1809 cleanup_one_si(info);
7faefea6
YL		 1810 } else {
1811 kfree(info);
1812 }
b361e27b
CM		 1813 } else {
1814 /* remove */
1815 struct smi_info *e, *tmp_e;
1816
1817 mutex_lock(&smi_infos_lock);
1818 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1819 if (e->io.addr_type != addr_space)
1820 continue;
1821 if (e->si_type != si_type)
1822 continue;
1823 if (e->io.addr_data == addr)
1824 cleanup_one_si(e);
1825 }
1826 mutex_unlock(&smi_infos_lock);
1827 }
1828 }
1d5636cc 1829 rv = len;
b361e27b
CM		 1830 out:
1831 kfree(str);
1832 return rv;
1833}
b0defcdb
CM		 1834
1835static __devinit void hardcode_find_bmc(void)
1da177e4 1836{
b0defcdb 1837 int i;
1da177e4
LT		 1838 struct smi_info *info;
1839
b0defcdb
CM		 1840 for (i = 0; i < SI_MAX_PARMS; i++) {
1841 if (!ports[i] && !addrs[i])
1842 continue;
1da177e4 1843
b0defcdb
CM		 1844 info = kzalloc(sizeof(*info), GFP_KERNEL);
1845 if (!info)
1846 return;
1da177e4 1847
5fedc4a2 1848 info->addr_source = SI_HARDCODED;
279fbd0c 1849 printk(KERN_INFO PFX "probing via hardcoded address\n");
1da177e4 1850
1d5636cc 1851 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
b0defcdb 1852 info->si_type = SI_KCS;
1d5636cc 1853 } else if (strcmp(si_type[i], "smic") == 0) {
b0defcdb 1854 info->si_type = SI_SMIC;
1d5636cc 1855 } else if (strcmp(si_type[i], "bt") == 0) {
b0defcdb
CM		 1856 info->si_type = SI_BT;
1857 } else {
279fbd0c 1858 printk(KERN_WARNING PFX "Interface type specified "
b0defcdb
CM		 1859 "for interface %d, was invalid: %s\n",
1860 i, si_type[i]);
1861 kfree(info);
1862 continue;
1863 }
1da177e4 1864
b0defcdb
CM		 1865 if (ports[i]) {
1866 /* An I/O port */
1867 info->io_setup = port_setup;
1868 info->io.addr_data = ports[i];
1869 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1870 } else if (addrs[i]) {
1871 /* A memory port */
1872 info->io_setup = mem_setup;
1873 info->io.addr_data = addrs[i];
1874 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1875 } else {
279fbd0c
MS		 1876 printk(KERN_WARNING PFX "Interface type specified "
1877 "for interface %d, but port and address were "
1878 "not set or set to zero.\n", i);
b0defcdb
CM		 1879 kfree(info);
1880 continue;
1881 }
1da177e4 1882
b0defcdb
CM		 1883 info->io.addr = NULL;
1884 info->io.regspacing = regspacings[i];
1885 if (!info->io.regspacing)
1886 info->io.regspacing = DEFAULT_REGSPACING;
1887 info->io.regsize = regsizes[i];
1888 if (!info->io.regsize)
1889 info->io.regsize = DEFAULT_REGSPACING;
1890 info->io.regshift = regshifts[i];
1891 info->irq = irqs[i];
1892 if (info->irq)
1893 info->irq_setup = std_irq_setup;
2f95d513 1894 info->slave_addr = slave_addrs[i];
1da177e4 1895
7faefea6 1896 if (!add_smi(info)) {
2407d77a
MG		 1897 if (try_smi_init(info))
1898 cleanup_one_si(info);
7faefea6
YL		 1899 } else {
1900 kfree(info);
1901 }
b0defcdb
CM		 1902 }
1903}
1da177e4 1904
8466361a 1905#ifdef CONFIG_ACPI
1da177e4
LT		 1906
1907#include <linux/acpi.h>
1908
c305e3d3
CM		 1909/*
1910 * Once we get an ACPI failure, we don't try any more, because we go
1911 * through the tables sequentially. Once we don't find a table, there
1912 * are no more.
1913 */
0c8204b3 1914static int acpi_failure;
1da177e4
LT		 1915
1916/* For GPE-type interrupts. */
1917static u32 ipmi_acpi_gpe(void *context)
1918{
1919 struct smi_info *smi_info = context;
1920 unsigned long flags;
1921#ifdef DEBUG_TIMING
1922 struct timeval t;
1923#endif
1924
1925 spin_lock_irqsave(&(smi_info->si_lock), flags);
1926
64959e2d 1927 smi_inc_stat(smi_info, interrupts);
1da177e4 1928
1da177e4
LT		 1929#ifdef DEBUG_TIMING
1930 do_gettimeofday(&t);
1931 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1932#endif
1933 smi_event_handler(smi_info, 0);
1da177e4
LT		 1934 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1935
1936 return ACPI_INTERRUPT_HANDLED;
1937}
1938
b0defcdb
CM		 1939static void acpi_gpe_irq_cleanup(struct smi_info *info)
1940{
1941 if (!info->irq)
1942 return;
1943
1944 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1945}
1946
1da177e4
LT		 1947static int acpi_gpe_irq_setup(struct smi_info *info)
1948{
1949 acpi_status status;
1950
b0defcdb 1951 if (!info->irq)
1da177e4
LT		 1952 return 0;
1953
1954 /* FIXME - is level triggered right? */
1955 status = acpi_install_gpe_handler(NULL,
1956 info->irq,
1957 ACPI_GPE_LEVEL_TRIGGERED,
1958 &ipmi_acpi_gpe,
1959 info);
1960 if (status != AE_OK) {
279fbd0c
MS		 1961 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
1962 " running polled\n", DEVICE_NAME, info->irq);
1da177e4
LT		 1963 info->irq = 0;
1964 return -EINVAL;
1965 } else {
b0defcdb 1966 info->irq_cleanup = acpi_gpe_irq_cleanup;
279fbd0c 1967 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
1da177e4
LT		 1968 return 0;
1969 }
1970}
1971
1da177e4
LT		 1972/*
1973 * Defined at
f46c77c2
JM		 1974 * http://h21007.www2.hp.com/portal/download/files
1975 * /unprot/hpspmi.pdf
1da177e4
LT		 1976 */
1977struct SPMITable {
1978 s8 Signature[4];
1979 u32 Length;
1980 u8 Revision;
1981 u8 Checksum;
1982 s8 OEMID[6];
1983 s8 OEMTableID[8];
1984 s8 OEMRevision[4];
1985 s8 CreatorID[4];
1986 s8 CreatorRevision[4];
1987 u8 InterfaceType;
1988 u8 IPMIlegacy;
1989 s16 SpecificationRevision;
1990
1991 /*
1992 * Bit 0 - SCI interrupt supported
1993 * Bit 1 - I/O APIC/SAPIC
1994 */
1995 u8 InterruptType;
1996
c305e3d3
CM		 1997 /*
1998 * If bit 0 of InterruptType is set, then this is the SCI
1999 * interrupt in the GPEx_STS register.
2000 */
1da177e4
LT		 2001 u8 GPE;
2002
2003 s16 Reserved;
2004
c305e3d3
CM		 2005 /*
2006 * If bit 1 of InterruptType is set, then this is the I/O
2007 * APIC/SAPIC interrupt.
2008 */
1da177e4
LT		 2009 u32 GlobalSystemInterrupt;
2010
2011 /* The actual register address. */
2012 struct acpi_generic_address addr;
2013
2014 u8 UID[4];
2015
2016 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
2017};
2018
18a3e0bf 2019static __devinit int try_init_spmi(struct SPMITable *spmi)
1da177e4
LT		 2020{
2021 struct smi_info *info;
1da177e4 2022
1da177e4 2023 if (spmi->IPMIlegacy != 1) {
279fbd0c
MS		 2024 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2025 return -ENODEV;
1da177e4
LT		 2026 }
2027
b0defcdb
CM		 2028 info = kzalloc(sizeof(*info), GFP_KERNEL);
2029 if (!info) {
279fbd0c 2030 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
b0defcdb
CM		 2031 return -ENOMEM;
2032 }
2033
5fedc4a2 2034 info->addr_source = SI_SPMI;
279fbd0c 2035 printk(KERN_INFO PFX "probing via SPMI\n");
1da177e4 2036
1da177e4 2037 /* Figure out the interface type. */
c305e3d3 2038 switch (spmi->InterfaceType) {
1da177e4 2039 case 1: /* KCS */
b0defcdb 2040 info->si_type = SI_KCS;
1da177e4 2041 break;
1da177e4 2042 case 2: /* SMIC */
b0defcdb 2043 info->si_type = SI_SMIC;
1da177e4 2044 break;
1da177e4 2045 case 3: /* BT */
b0defcdb 2046 info->si_type = SI_BT;
1da177e4 2047 break;
1da177e4 2048 default:
279fbd0c
MS		 2049 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2050 spmi->InterfaceType);
b0defcdb 2051 kfree(info);
1da177e4
LT		 2052 return -EIO;
2053 }
2054
1da177e4
LT		 2055 if (spmi->InterruptType & 1) {
2056 /* We've got a GPE interrupt. */
2057 info->irq = spmi->GPE;
2058 info->irq_setup = acpi_gpe_irq_setup;
1da177e4
LT		 2059 } else if (spmi->InterruptType & 2) {
2060 /* We've got an APIC/SAPIC interrupt. */
2061 info->irq = spmi->GlobalSystemInterrupt;
2062 info->irq_setup = std_irq_setup;
1da177e4
LT		 2063 } else {
2064 /* Use the default interrupt setting. */
2065 info->irq = 0;
2066 info->irq_setup = NULL;
2067 }
2068
15a58ed1 2069 if (spmi->addr.bit_width) {
35bc37a0 2070 /* A (hopefully) properly formed register bit width. */
15a58ed1 2071 info->io.regspacing = spmi->addr.bit_width / 8;
35bc37a0 2072 } else {
35bc37a0
CM		 2073 info->io.regspacing = DEFAULT_REGSPACING;
2074 }
b0defcdb 2075 info->io.regsize = info->io.regspacing;
15a58ed1 2076 info->io.regshift = spmi->addr.bit_offset;
1da177e4 2077
15a58ed1 2078 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
1da177e4 2079 info->io_setup = mem_setup;
8fe1425a 2080 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
15a58ed1 2081 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
1da177e4 2082 info->io_setup = port_setup;
8fe1425a 2083 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1da177e4
LT		 2084 } else {
2085 kfree(info);
279fbd0c 2086 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
1da177e4
LT		 2087 return -EIO;
2088 }
b0defcdb 2089 info->io.addr_data = spmi->addr.address;
1da177e4 2090
7faefea6
YL		 2091 if (add_smi(info))
2092 kfree(info);
1da177e4 2093
1da177e4
LT		 2094 return 0;
2095}
b0defcdb 2096
18a3e0bf 2097static __devinit void spmi_find_bmc(void)
b0defcdb
CM		 2098{
2099 acpi_status status;
2100 struct SPMITable *spmi;
2101 int i;
2102
2103 if (acpi_disabled)
2104 return;
2105
2106 if (acpi_failure)
2107 return;
2108
2109 for (i = 0; ; i++) {
15a58ed1
AS		 2110 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2111 (struct acpi_table_header **)&spmi);
b0defcdb
CM		 2112 if (status != AE_OK)
2113 return;
2114
18a3e0bf 2115 try_init_spmi(spmi);
b0defcdb
CM		 2116 }
2117}
9e368fa0
BH		 2118
2119static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
2120 const struct pnp_device_id *dev_id)
2121{
2122 struct acpi_device *acpi_dev;
2123 struct smi_info *info;
279fbd0c 2124 struct resource *res;
9e368fa0
BH		 2125 acpi_handle handle;
2126 acpi_status status;
2127 unsigned long long tmp;
2128
2129 acpi_dev = pnp_acpi_device(dev);
2130 if (!acpi_dev)
2131 return -ENODEV;
2132
2133 info = kzalloc(sizeof(*info), GFP_KERNEL);
2134 if (!info)
2135 return -ENOMEM;
2136
5fedc4a2 2137 info->addr_source = SI_ACPI;
279fbd0c 2138 printk(KERN_INFO PFX "probing via ACPI\n");
9e368fa0
BH		 2139
2140 handle = acpi_dev->handle;
2141
2142 /* _IFT tells us the interface type: KCS, BT, etc */
2143 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2144 if (ACPI_FAILURE(status))
2145 goto err_free;
2146
2147 switch (tmp) {
2148 case 1:
2149 info->si_type = SI_KCS;
2150 break;
2151 case 2:
2152 info->si_type = SI_SMIC;
2153 break;
2154 case 3:
2155 info->si_type = SI_BT;
2156 break;
2157 default:
279fbd0c 2158 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
9e368fa0
BH		 2159 goto err_free;
2160 }
2161
279fbd0c
MS		 2162 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2163 if (res) {
9e368fa0
BH		 2164 info->io_setup = port_setup;
2165 info->io.addr_type = IPMI_IO_ADDR_SPACE;
9e368fa0 2166 } else {
279fbd0c
MS		 2167 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2168 if (res) {
2169 info->io_setup = mem_setup;
2170 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2171 }
2172 }
2173 if (!res) {
9e368fa0
BH		 2174 dev_err(&dev->dev, "no I/O or memory address\n");
2175 goto err_free;
2176 }
279fbd0c 2177 info->io.addr_data = res->start;
9e368fa0
BH		 2178
2179 info->io.regspacing = DEFAULT_REGSPACING;
d9e1b6c4
YL		 2180 res = pnp_get_resource(dev,
2181 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2182 IORESOURCE_IO : IORESOURCE_MEM,
2183 1);
2184 if (res) {
2185 if (res->start > info->io.addr_data)
2186 info->io.regspacing = res->start - info->io.addr_data;
2187 }
9e368fa0
BH		 2188 info->io.regsize = DEFAULT_REGSPACING;
2189 info->io.regshift = 0;
2190
2191 /* If _GPE exists, use it; otherwise use standard interrupts */
2192 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2193 if (ACPI_SUCCESS(status)) {
2194 info->irq = tmp;
2195 info->irq_setup = acpi_gpe_irq_setup;
2196 } else if (pnp_irq_valid(dev, 0)) {
2197 info->irq = pnp_irq(dev, 0);
2198 info->irq_setup = std_irq_setup;
2199 }
2200
8c8eae27 2201 info->dev = &dev->dev;
9e368fa0
BH		 2202 pnp_set_drvdata(dev, info);
2203
279fbd0c
MS		 2204 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2205 res, info->io.regsize, info->io.regspacing,
2206 info->irq);
2207
7faefea6
YL		 2208 if (add_smi(info))
2209 goto err_free;
2210
2211 return 0;
9e368fa0
BH		 2212
2213err_free:
2214 kfree(info);
2215 return -EINVAL;
2216}
2217
2218static void __devexit ipmi_pnp_remove(struct pnp_dev *dev)
2219{
2220 struct smi_info *info = pnp_get_drvdata(dev);
2221
2222 cleanup_one_si(info);
2223}
2224
2225static const struct pnp_device_id pnp_dev_table[] = {
2226 {"IPI0001", 0},
2227 {"", 0},
2228};
2229
2230static struct pnp_driver ipmi_pnp_driver = {
2231 .name = DEVICE_NAME,
2232 .probe = ipmi_pnp_probe,
2233 .remove = __devexit_p(ipmi_pnp_remove),
2234 .id_table = pnp_dev_table,
2235};
1da177e4
LT		 2236#endif
2237
a9fad4cc 2238#ifdef CONFIG_DMI
c305e3d3 2239struct dmi_ipmi_data {
1da177e4
LT		 2240 u8 type;
2241 u8 addr_space;
2242 unsigned long base_addr;
2243 u8 irq;
2244 u8 offset;
2245 u8 slave_addr;
b0defcdb 2246};
1da177e4 2247
1855256c 2248static int __devinit decode_dmi(const struct dmi_header *dm,
b0defcdb 2249 struct dmi_ipmi_data *dmi)
1da177e4 2250{
1855256c 2251 const u8 *data = (const u8 *)dm;
1da177e4
LT		 2252 unsigned long base_addr;
2253 u8 reg_spacing;
b224cd3a 2254 u8 len = dm->length;
1da177e4 2255
b0defcdb 2256 dmi->type = data[4];
1da177e4
LT		 2257
2258 memcpy(&base_addr, data+8, sizeof(unsigned long));
2259 if (len >= 0x11) {
2260 if (base_addr & 1) {
2261 /* I/O */
2262 base_addr &= 0xFFFE;
b0defcdb 2263 dmi->addr_space = IPMI_IO_ADDR_SPACE;
c305e3d3 2264 } else
1da177e4 2265 /* Memory */
b0defcdb 2266 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
c305e3d3 2267
1da177e4
LT		 2268 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2269 is odd. */
b0defcdb 2270 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
1da177e4 2271
b0defcdb 2272 dmi->irq = data[0x11];
1da177e4
LT		 2273
2274 /* The top two bits of byte 0x10 hold the register spacing. */
b224cd3a 2275 reg_spacing = (data[0x10] & 0xC0) >> 6;
c305e3d3 2276 switch (reg_spacing) {
1da177e4 2277 case 0x00: /* Byte boundaries */
b0defcdb 2278 dmi->offset = 1;
1da177e4
LT		 2279 break;
2280 case 0x01: /* 32-bit boundaries */
b0defcdb 2281 dmi->offset = 4;
1da177e4
LT		 2282 break;
2283 case 0x02: /* 16-byte boundaries */
b0defcdb 2284 dmi->offset = 16;
1da177e4
LT		 2285 break;
2286 default:
2287 /* Some other interface, just ignore it. */
2288 return -EIO;
2289 }
2290 } else {
2291 /* Old DMI spec. */
c305e3d3
CM		 2292 /*
2293 * Note that technically, the lower bit of the base
92068801
CM		 2294 * address should be 1 if the address is I/O and 0 if
2295 * the address is in memory. So many systems get that
2296 * wrong (and all that I have seen are I/O) so we just
2297 * ignore that bit and assume I/O. Systems that use
c305e3d3
CM		 2298 * memory should use the newer spec, anyway.
2299 */
b0defcdb
CM		 2300 dmi->base_addr = base_addr & 0xfffe;
2301 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2302 dmi->offset = 1;
1da177e4
LT		 2303 }
2304
b0defcdb 2305 dmi->slave_addr = data[6];
1da177e4 2306
b0defcdb 2307 return 0;
1da177e4
LT		 2308}
2309
b0defcdb 2310static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
1da177e4 2311{
b0defcdb 2312 struct smi_info *info;
1da177e4 2313
b0defcdb
CM		 2314 info = kzalloc(sizeof(*info), GFP_KERNEL);
2315 if (!info) {
279fbd0c 2316 printk(KERN_ERR PFX "Could not allocate SI data\n");
b0defcdb 2317 return;
1da177e4 2318 }
1da177e4 2319
5fedc4a2 2320 info->addr_source = SI_SMBIOS;
279fbd0c 2321 printk(KERN_INFO PFX "probing via SMBIOS\n");
1da177e4 2322
e8b33617 2323 switch (ipmi_data->type) {
b0defcdb
CM		 2324 case 0x01: /* KCS */
2325 info->si_type = SI_KCS;
2326 break;
2327 case 0x02: /* SMIC */
2328 info->si_type = SI_SMIC;
2329 break;
2330 case 0x03: /* BT */
2331 info->si_type = SI_BT;
2332 break;
2333 default:
80cd6920 2334 kfree(info);
b0defcdb 2335 return;
1da177e4 2336 }
1da177e4 2337
b0defcdb
CM		 2338 switch (ipmi_data->addr_space) {
2339 case IPMI_MEM_ADDR_SPACE:
1da177e4 2340 info->io_setup = mem_setup;
b0defcdb
CM		 2341 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2342 break;
2343
2344 case IPMI_IO_ADDR_SPACE:
1da177e4 2345 info->io_setup = port_setup;
b0defcdb
CM		 2346 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2347 break;
2348
2349 default:
1da177e4 2350 kfree(info);
279fbd0c 2351 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
b0defcdb
CM		 2352 ipmi_data->addr_space);
2353 return;
1da177e4 2354 }
b0defcdb 2355 info->io.addr_data = ipmi_data->base_addr;
1da177e4 2356
b0defcdb
CM		 2357 info->io.regspacing = ipmi_data->offset;
2358 if (!info->io.regspacing)
1da177e4
LT		 2359 info->io.regspacing = DEFAULT_REGSPACING;
2360 info->io.regsize = DEFAULT_REGSPACING;
b0defcdb 2361 info->io.regshift = 0;
1da177e4
LT		 2362
2363 info->slave_addr = ipmi_data->slave_addr;
2364
b0defcdb
CM		 2365 info->irq = ipmi_data->irq;
2366 if (info->irq)
2367 info->irq_setup = std_irq_setup;
1da177e4 2368
7faefea6
YL		 2369 if (add_smi(info))
2370 kfree(info);
b0defcdb 2371}
1da177e4 2372
b0defcdb
CM		 2373static void __devinit dmi_find_bmc(void)
2374{
1855256c 2375 const struct dmi_device *dev = NULL;
b0defcdb
CM		 2376 struct dmi_ipmi_data data;
2377 int rv;
2378
2379 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
397f4ebf 2380 memset(&data, 0, sizeof(data));
1855256c
JG		 2381 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2382 &data);
b0defcdb
CM		 2383 if (!rv)
2384 try_init_dmi(&data);
2385 }
1da177e4 2386}
a9fad4cc 2387#endif /* CONFIG_DMI */
1da177e4
LT		 2388
2389#ifdef CONFIG_PCI
2390
b0defcdb
CM		 2391#define PCI_ERMC_CLASSCODE 0x0C0700
2392#define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2393#define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2394#define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2395#define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2396#define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2397
1da177e4
LT		 2398#define PCI_HP_VENDOR_ID 0x103C
2399#define PCI_MMC_DEVICE_ID 0x121A
2400#define PCI_MMC_ADDR_CW 0x10
2401
b0defcdb
CM		 2402static void ipmi_pci_cleanup(struct smi_info *info)
2403{
2404 struct pci_dev *pdev = info->addr_source_data;
2405
2406 pci_disable_device(pdev);
2407}
1da177e4 2408
b0defcdb
CM		 2409static int __devinit ipmi_pci_probe(struct pci_dev *pdev,
2410 const struct pci_device_id *ent)
1da177e4 2411{
b0defcdb
CM		 2412 int rv;
2413 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2414 struct smi_info *info;
1da177e4 2415
b0defcdb
CM		 2416 info = kzalloc(sizeof(*info), GFP_KERNEL);
2417 if (!info)
1cd441f9 2418 return -ENOMEM;
1da177e4 2419
5fedc4a2 2420 info->addr_source = SI_PCI;
279fbd0c 2421 dev_info(&pdev->dev, "probing via PCI");
1da177e4 2422
b0defcdb
CM		 2423 switch (class_type) {
2424 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2425 info->si_type = SI_SMIC;
2426 break;
1da177e4 2427
b0defcdb
CM		 2428 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2429 info->si_type = SI_KCS;
2430 break;
2431
2432 case PCI_ERMC_CLASSCODE_TYPE_BT:
2433 info->si_type = SI_BT;
2434 break;
2435
2436 default:
2437 kfree(info);
279fbd0c 2438 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
1cd441f9 2439 return -ENOMEM;
1da177e4
LT		 2440 }
2441
b0defcdb
CM		 2442 rv = pci_enable_device(pdev);
2443 if (rv) {
279fbd0c 2444 dev_err(&pdev->dev, "couldn't enable PCI device\n");
b0defcdb
CM		 2445 kfree(info);
2446 return rv;
1da177e4
LT		 2447 }
2448
b0defcdb
CM		 2449 info->addr_source_cleanup = ipmi_pci_cleanup;
2450 info->addr_source_data = pdev;
1da177e4 2451
b0defcdb
CM		 2452 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2453 info->io_setup = port_setup;
2454 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2455 } else {
2456 info->io_setup = mem_setup;
2457 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1da177e4 2458 }
b0defcdb 2459 info->io.addr_data = pci_resource_start(pdev, 0);
1da177e4 2460
b0defcdb 2461 info->io.regspacing = DEFAULT_REGSPACING;
1da177e4 2462 info->io.regsize = DEFAULT_REGSPACING;
b0defcdb 2463 info->io.regshift = 0;
1da177e4 2464
b0defcdb
CM		 2465 info->irq = pdev->irq;
2466 if (info->irq)
2467 info->irq_setup = std_irq_setup;
1da177e4 2468
50c812b2 2469 info->dev = &pdev->dev;
fca3b747 2470 pci_set_drvdata(pdev, info);
50c812b2 2471
279fbd0c
MS		 2472 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2473 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2474 info->irq);
2475
7faefea6
YL		 2476 if (add_smi(info))
2477 kfree(info);
2478
2479 return 0;
b0defcdb 2480}
1da177e4 2481
b0defcdb
CM		 2482static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
2483{
fca3b747
CM		 2484 struct smi_info *info = pci_get_drvdata(pdev);
2485 cleanup_one_si(info);
b0defcdb 2486}
1da177e4 2487
b0defcdb
CM		 2488#ifdef CONFIG_PM
2489static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2490{
1da177e4
LT		 2491 return 0;
2492}
1da177e4 2493
b0defcdb 2494static int ipmi_pci_resume(struct pci_dev *pdev)
1da177e4 2495{
b0defcdb
CM		 2496 return 0;
2497}
1da177e4 2498#endif
1da177e4 2499
b0defcdb
CM		 2500static struct pci_device_id ipmi_pci_devices[] = {
2501 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
248bdd5e
KC		 2502 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2503 { 0, }
b0defcdb
CM		 2504};
2505MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2506
2507static struct pci_driver ipmi_pci_driver = {
c305e3d3
CM		 2508 .name = DEVICE_NAME,
2509 .id_table = ipmi_pci_devices,
2510 .probe = ipmi_pci_probe,
2511 .remove = __devexit_p(ipmi_pci_remove),
b0defcdb 2512#ifdef CONFIG_PM
c305e3d3
CM		 2513 .suspend = ipmi_pci_suspend,
2514 .resume = ipmi_pci_resume,
b0defcdb
CM		 2515#endif
2516};
2517#endif /* CONFIG_PCI */
1da177e4
LT		 2518
2519
dba9b4f6
CM		 2520#ifdef CONFIG_PPC_OF
2521static int __devinit ipmi_of_probe(struct of_device *dev,
2522 const struct of_device_id *match)
2523{
2524 struct smi_info *info;
2525 struct resource resource;
2526 const int *regsize, *regspacing, *regshift;
61c7a080 2527 struct device_node *np = dev->dev.of_node;
dba9b4f6
CM		 2528 int ret;
2529 int proplen;
2530
279fbd0c 2531 dev_info(&dev->dev, "probing via device tree\n");
dba9b4f6
CM		 2532
2533 ret = of_address_to_resource(np, 0, &resource);
2534 if (ret) {
2535 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2536 return ret;
2537 }
2538
9c25099d 2539 regsize = of_get_property(np, "reg-size", &proplen);
dba9b4f6
CM		 2540 if (regsize && proplen != 4) {
2541 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2542 return -EINVAL;
2543 }
2544
9c25099d 2545 regspacing = of_get_property(np, "reg-spacing", &proplen);
dba9b4f6
CM		 2546 if (regspacing && proplen != 4) {
2547 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2548 return -EINVAL;
2549 }
2550
9c25099d 2551 regshift = of_get_property(np, "reg-shift", &proplen);
dba9b4f6
CM		 2552 if (regshift && proplen != 4) {
2553 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2554 return -EINVAL;
2555 }
2556
2557 info = kzalloc(sizeof(*info), GFP_KERNEL);
2558
2559 if (!info) {
2560 dev_err(&dev->dev,
279fbd0c 2561 "could not allocate memory for OF probe\n");
dba9b4f6
CM		 2562 return -ENOMEM;
2563 }
2564
2565 info->si_type = (enum si_type) match->data;
5fedc4a2 2566 info->addr_source = SI_DEVICETREE;
dba9b4f6
CM		 2567 info->irq_setup = std_irq_setup;
2568
3b7ec117
NC		 2569 if (resource.flags & IORESOURCE_IO) {
2570 info->io_setup = port_setup;
2571 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2572 } else {
2573 info->io_setup = mem_setup;
2574 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2575 }
2576
dba9b4f6
CM		 2577 info->io.addr_data = resource.start;
2578
2579 info->io.regsize = regsize ? *regsize : DEFAULT_REGSIZE;
2580 info->io.regspacing = regspacing ? *regspacing : DEFAULT_REGSPACING;
2581 info->io.regshift = regshift ? *regshift : 0;
2582
61c7a080 2583 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
dba9b4f6
CM		 2584 info->dev = &dev->dev;
2585
279fbd0c 2586 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
dba9b4f6
CM		 2587 info->io.addr_data, info->io.regsize, info->io.regspacing,
2588 info->irq);
2589
9de33df4 2590 dev_set_drvdata(&dev->dev, info);
dba9b4f6 2591
7faefea6
YL		 2592 if (add_smi(info)) {
2593 kfree(info);
2594 return -EBUSY;
2595 }
2596
2597 return 0;
dba9b4f6
CM		 2598}
2599
2600static int __devexit ipmi_of_remove(struct of_device *dev)
2601{
9de33df4 2602 cleanup_one_si(dev_get_drvdata(&dev->dev));
dba9b4f6
CM		 2603 return 0;
2604}
2605
2606static struct of_device_id ipmi_match[] =
2607{
c305e3d3
CM		 2608 { .type = "ipmi", .compatible = "ipmi-kcs",
2609 .data = (void *)(unsigned long) SI_KCS },
2610 { .type = "ipmi", .compatible = "ipmi-smic",
2611 .data = (void *)(unsigned long) SI_SMIC },
2612 { .type = "ipmi", .compatible = "ipmi-bt",
2613 .data = (void *)(unsigned long) SI_BT },
dba9b4f6
CM		 2614 {},
2615};
2616
c305e3d3 2617static struct of_platform_driver ipmi_of_platform_driver = {
4018294b
GL		 2618 .driver = {
2619 .name = "ipmi",
2620 .owner = THIS_MODULE,
2621 .of_match_table = ipmi_match,
2622 },
dba9b4f6
CM		 2623 .probe = ipmi_of_probe,
2624 .remove = __devexit_p(ipmi_of_remove),
2625};
2626#endif /* CONFIG_PPC_OF */
2627
40112ae7 2628static int wait_for_msg_done(struct smi_info *smi_info)
1da177e4 2629{
50c812b2 2630 enum si_sm_result smi_result;
1da177e4
LT		 2631
2632 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
c305e3d3 2633 for (;;) {
c3e7e791
CM		 2634 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2635 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
da4cd8df 2636 schedule_timeout_uninterruptible(1);
1da177e4
LT		 2637 smi_result = smi_info->handlers->event(
2638 smi_info->si_sm, 100);
c305e3d3 2639 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
1da177e4
LT		 2640 smi_result = smi_info->handlers->event(
2641 smi_info->si_sm, 0);
c305e3d3 2642 } else
1da177e4
LT		 2643 break;
2644 }
40112ae7 2645 if (smi_result == SI_SM_HOSED)
c305e3d3
CM		 2646 /*
2647 * We couldn't get the state machine to run, so whatever's at
2648 * the port is probably not an IPMI SMI interface.
2649 */
40112ae7
CM		 2650 return -ENODEV;
2651
2652 return 0;
2653}
2654
2655static int try_get_dev_id(struct smi_info *smi_info)
2656{
2657 unsigned char msg[2];
2658 unsigned char *resp;
2659 unsigned long resp_len;
2660 int rv = 0;
2661
2662 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2663 if (!resp)
2664 return -ENOMEM;
2665
2666 /*
2667 * Do a Get Device ID command, since it comes back with some
2668 * useful info.
2669 */
2670 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2671 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2672 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2673
2674 rv = wait_for_msg_done(smi_info);
2675 if (rv)
1da177e4 2676 goto out;
1da177e4 2677
1da177e4
LT		 2678 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2679 resp, IPMI_MAX_MSG_LENGTH);
1da177e4 2680
d8c98618
CM		 2681 /* Check and record info from the get device id, in case we need it. */
2682 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
1da177e4
LT		 2683
2684 out:
2685 kfree(resp);
2686 return rv;
2687}
2688
40112ae7
CM		 2689static int try_enable_event_buffer(struct smi_info *smi_info)
2690{
2691 unsigned char msg[3];
2692 unsigned char *resp;
2693 unsigned long resp_len;
2694 int rv = 0;
2695
2696 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2697 if (!resp)
2698 return -ENOMEM;
2699
2700 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2701 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2702 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2703
2704 rv = wait_for_msg_done(smi_info);
2705 if (rv) {
279fbd0c
MS		 2706 printk(KERN_WARNING PFX "Error getting response from get"
2707 " global enables command, the event buffer is not"
40112ae7
CM		 2708 " enabled.\n");
2709 goto out;
2710 }
2711
2712 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2713 resp, IPMI_MAX_MSG_LENGTH);
2714
2715 if (resp_len < 4 ||
2716 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2717 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2718 resp[2] != 0) {
279fbd0c
MS		 2719 printk(KERN_WARNING PFX "Invalid return from get global"
2720 " enables command, cannot enable the event buffer.\n");
40112ae7
CM		 2721 rv = -EINVAL;
2722 goto out;
2723 }
2724
2725 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2726 /* buffer is already enabled, nothing to do. */
2727 goto out;
2728
2729 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2730 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2731 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2732 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2733
2734 rv = wait_for_msg_done(smi_info);
2735 if (rv) {
279fbd0c
MS		 2736 printk(KERN_WARNING PFX "Error getting response from set"
2737 " global, enables command, the event buffer is not"
40112ae7
CM		 2738 " enabled.\n");
2739 goto out;
2740 }
2741
2742 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2743 resp, IPMI_MAX_MSG_LENGTH);
2744
2745 if (resp_len < 3 ||
2746 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2747 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
279fbd0c
MS		 2748 printk(KERN_WARNING PFX "Invalid return from get global,"
2749 "enables command, not enable the event buffer.\n");
40112ae7
CM		 2750 rv = -EINVAL;
2751 goto out;
2752 }
2753
2754 if (resp[2] != 0)
2755 /*
2756 * An error when setting the event buffer bit means
2757 * that the event buffer is not supported.
2758 */
2759 rv = -ENOENT;
2760 out:
2761 kfree(resp);
2762 return rv;
2763}
2764
1da177e4
LT		 2765static int type_file_read_proc(char *page, char **start, off_t off,
2766 int count, int *eof, void *data)
2767{
1da177e4
LT		 2768 struct smi_info *smi = data;
2769
b361e27b 2770 return sprintf(page, "%s\n", si_to_str[smi->si_type]);
1da177e4
LT		 2771}
2772
2773static int stat_file_read_proc(char *page, char **start, off_t off,
2774 int count, int *eof, void *data)
2775{
2776 char *out = (char *) page;
2777 struct smi_info *smi = data;
2778
2779 out += sprintf(out, "interrupts_enabled: %d\n",
b0defcdb 2780 smi->irq && !smi->interrupt_disabled);
64959e2d
CM		 2781 out += sprintf(out, "short_timeouts: %u\n",
2782 smi_get_stat(smi, short_timeouts));
2783 out += sprintf(out, "long_timeouts: %u\n",
2784 smi_get_stat(smi, long_timeouts));
64959e2d
CM		 2785 out += sprintf(out, "idles: %u\n",
2786 smi_get_stat(smi, idles));
2787 out += sprintf(out, "interrupts: %u\n",
2788 smi_get_stat(smi, interrupts));
2789 out += sprintf(out, "attentions: %u\n",
2790 smi_get_stat(smi, attentions));
2791 out += sprintf(out, "flag_fetches: %u\n",
2792 smi_get_stat(smi, flag_fetches));
2793 out += sprintf(out, "hosed_count: %u\n",
2794 smi_get_stat(smi, hosed_count));
2795 out += sprintf(out, "complete_transactions: %u\n",
2796 smi_get_stat(smi, complete_transactions));
2797 out += sprintf(out, "events: %u\n",
2798 smi_get_stat(smi, events));
2799 out += sprintf(out, "watchdog_pretimeouts: %u\n",
2800 smi_get_stat(smi, watchdog_pretimeouts));
2801 out += sprintf(out, "incoming_messages: %u\n",
2802 smi_get_stat(smi, incoming_messages));
1da177e4 2803
b361e27b
CM		 2804 return out - page;
2805}
2806
2807static int param_read_proc(char *page, char **start, off_t off,
2808 int count, int *eof, void *data)
2809{
2810 struct smi_info *smi = data;
2811
2812 return sprintf(page,
2813 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2814 si_to_str[smi->si_type],
2815 addr_space_to_str[smi->io.addr_type],
2816 smi->io.addr_data,
2817 smi->io.regspacing,
2818 smi->io.regsize,
2819 smi->io.regshift,
2820 smi->irq,
2821 smi->slave_addr);
1da177e4
LT		 2822}
2823
3ae0e0f9
CM		 2824/*
2825 * oem_data_avail_to_receive_msg_avail
2826 * @info - smi_info structure with msg_flags set
2827 *
2828 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2829 * Returns 1 indicating need to re-run handle_flags().
2830 */
2831static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
2832{
e8b33617 2833 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
c305e3d3 2834 RECEIVE_MSG_AVAIL);
3ae0e0f9
CM		 2835 return 1;
2836}
2837
2838/*
2839 * setup_dell_poweredge_oem_data_handler
2840 * @info - smi_info.device_id must be populated
2841 *
2842 * Systems that match, but have firmware version < 1.40 may assert
2843 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
2844 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
2845 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
2846 * as RECEIVE_MSG_AVAIL instead.
2847 *
2848 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
2849 * assert the OEM[012] bits, and if it did, the driver would have to
2850 * change to handle that properly, we don't actually check for the
2851 * firmware version.
2852 * Device ID = 0x20 BMC on PowerEdge 8G servers
2853 * Device Revision = 0x80
2854 * Firmware Revision1 = 0x01 BMC version 1.40
2855 * Firmware Revision2 = 0x40 BCD encoded
2856 * IPMI Version = 0x51 IPMI 1.5
2857 * Manufacturer ID = A2 02 00 Dell IANA
2858 *
d5a2b89a
CM		 2859 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
2860 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
2861 *
3ae0e0f9
CM		 2862 */
2863#define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
2864#define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
2865#define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
50c812b2 2866#define DELL_IANA_MFR_ID 0x0002a2
3ae0e0f9
CM		 2867static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
2868{
2869 struct ipmi_device_id *id = &smi_info->device_id;
50c812b2 2870 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
d5a2b89a
CM		 2871 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
2872 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
50c812b2 2873 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
d5a2b89a
CM		 2874 smi_info->oem_data_avail_handler =
2875 oem_data_avail_to_receive_msg_avail;
c305e3d3
CM		 2876 } else if (ipmi_version_major(id) < 1 ||
2877 (ipmi_version_major(id) == 1 &&
2878 ipmi_version_minor(id) < 5)) {
d5a2b89a
CM		 2879 smi_info->oem_data_avail_handler =
2880 oem_data_avail_to_receive_msg_avail;
2881 }
3ae0e0f9
CM		 2882 }
2883}
2884
ea94027b
CM		 2885#define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
2886static void return_hosed_msg_badsize(struct smi_info *smi_info)
2887{
2888 struct ipmi_smi_msg *msg = smi_info->curr_msg;
2889
2890 /* Make it a reponse */
2891 msg->rsp[0] = msg->data[0] | 4;
2892 msg->rsp[1] = msg->data[1];
2893 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
2894 msg->rsp_size = 3;
2895 smi_info->curr_msg = NULL;
2896 deliver_recv_msg(smi_info, msg);
2897}
2898
2899/*
2900 * dell_poweredge_bt_xaction_handler
2901 * @info - smi_info.device_id must be populated
2902 *
2903 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
2904 * not respond to a Get SDR command if the length of the data
2905 * requested is exactly 0x3A, which leads to command timeouts and no
2906 * data returned. This intercepts such commands, and causes userspace
2907 * callers to try again with a different-sized buffer, which succeeds.
2908 */
2909
2910#define STORAGE_NETFN 0x0A
2911#define STORAGE_CMD_GET_SDR 0x23
2912static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
2913 unsigned long unused,
2914 void *in)
2915{
2916 struct smi_info *smi_info = in;
2917 unsigned char *data = smi_info->curr_msg->data;
2918 unsigned int size = smi_info->curr_msg->data_size;
2919 if (size >= 8 &&
2920 (data[0]>>2) == STORAGE_NETFN &&
2921 data[1] == STORAGE_CMD_GET_SDR &&
2922 data[7] == 0x3A) {
2923 return_hosed_msg_badsize(smi_info);
2924 return NOTIFY_STOP;
2925 }
2926 return NOTIFY_DONE;
2927}
2928
2929static struct notifier_block dell_poweredge_bt_xaction_notifier = {
2930 .notifier_call = dell_poweredge_bt_xaction_handler,
2931};
2932
2933/*
2934 * setup_dell_poweredge_bt_xaction_handler
2935 * @info - smi_info.device_id must be filled in already
2936 *
2937 * Fills in smi_info.device_id.start_transaction_pre_hook
2938 * when we know what function to use there.
2939 */
2940static void
2941setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
2942{
2943 struct ipmi_device_id *id = &smi_info->device_id;
50c812b2 2944 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
ea94027b
CM		 2945 smi_info->si_type == SI_BT)
2946 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
2947}
2948
3ae0e0f9
CM		 2949/*
2950 * setup_oem_data_handler
2951 * @info - smi_info.device_id must be filled in already
2952 *
2953 * Fills in smi_info.device_id.oem_data_available_handler
2954 * when we know what function to use there.
2955 */
2956
2957static void setup_oem_data_handler(struct smi_info *smi_info)
2958{
2959 setup_dell_poweredge_oem_data_handler(smi_info);
2960}
2961
ea94027b
CM		 2962static void setup_xaction_handlers(struct smi_info *smi_info)
2963{
2964 setup_dell_poweredge_bt_xaction_handler(smi_info);
2965}
2966
a9a2c44f
CM		 2967static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
2968{
453823ba 2969 if (smi_info->intf) {
c305e3d3
CM		 2970 /*
2971 * The timer and thread are only running if the
2972 * interface has been started up and registered.
2973 */
453823ba
CM		 2974 if (smi_info->thread != NULL)
2975 kthread_stop(smi_info->thread);
2976 del_timer_sync(&smi_info->si_timer);
2977 }
a9a2c44f
CM		 2978}
2979
7420884c 2980static __devinitdata struct ipmi_default_vals
b0defcdb
CM		 2981{
2982 int type;
2983 int port;
7420884c 2984} ipmi_defaults[] =
b0defcdb
CM		 2985{
2986 { .type = SI_KCS, .port = 0xca2 },
2987 { .type = SI_SMIC, .port = 0xca9 },
2988 { .type = SI_BT, .port = 0xe4 },
2989 { .port = 0 }
2990};
2991
2992static __devinit void default_find_bmc(void)
2993{
2994 struct smi_info *info;
2995 int i;
2996
2997 for (i = 0; ; i++) {
2998 if (!ipmi_defaults[i].port)
2999 break;
68e1ee62 3000#ifdef CONFIG_PPC
4ff31d77
CK		 3001 if (check_legacy_ioport(ipmi_defaults[i].port))
3002 continue;
3003#endif
a09f4855
AM		 3004 info = kzalloc(sizeof(*info), GFP_KERNEL);
3005 if (!info)
3006 return;
4ff31d77 3007
5fedc4a2 3008 info->addr_source = SI_DEFAULT;
b0defcdb
CM		 3009
3010 info->si_type = ipmi_defaults[i].type;
3011 info->io_setup = port_setup;
3012 info->io.addr_data = ipmi_defaults[i].port;
3013 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3014
3015 info->io.addr = NULL;
3016 info->io.regspacing = DEFAULT_REGSPACING;
3017 info->io.regsize = DEFAULT_REGSPACING;
3018 info->io.regshift = 0;
3019
2407d77a
MG		 3020 if (add_smi(info) == 0) {
3021 if ((try_smi_init(info)) == 0) {
3022 /* Found one... */
279fbd0c 3023 printk(KERN_INFO PFX "Found default %s"
2407d77a
MG		 3024 " state machine at %s address 0x%lx\n",
3025 si_to_str[info->si_type],
3026 addr_space_to_str[info->io.addr_type],
3027 info->io.addr_data);
3028 } else
3029 cleanup_one_si(info);
7faefea6
YL		 3030 } else {
3031 kfree(info);
b0defcdb
CM		 3032 }
3033 }
3034}
3035
3036static int is_new_interface(struct smi_info *info)
1da177e4 3037{
b0defcdb 3038 struct smi_info *e;
1da177e4 3039
b0defcdb
CM		 3040 list_for_each_entry(e, &smi_infos, link) {
3041 if (e->io.addr_type != info->io.addr_type)
3042 continue;
3043 if (e->io.addr_data == info->io.addr_data)
3044 return 0;
3045 }
1da177e4 3046
b0defcdb
CM		 3047 return 1;
3048}
1da177e4 3049
2407d77a 3050static int add_smi(struct smi_info *new_smi)
b0defcdb 3051{
2407d77a 3052 int rv = 0;
b0defcdb 3053
279fbd0c 3054 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
2407d77a
MG		 3055 ipmi_addr_src_to_str[new_smi->addr_source],
3056 si_to_str[new_smi->si_type]);
d6dfd131 3057 mutex_lock(&smi_infos_lock);
b0defcdb 3058 if (!is_new_interface(new_smi)) {
279fbd0c 3059 printk(KERN_CONT PFX "duplicate interface\n");
b0defcdb
CM		 3060 rv = -EBUSY;
3061 goto out_err;
3062 }
1da177e4 3063
2407d77a
MG		 3064 printk(KERN_CONT "\n");
3065
1da177e4
LT		 3066 /* So we know not to free it unless we have allocated one. */
3067 new_smi->intf = NULL;
3068 new_smi->si_sm = NULL;
3069 new_smi->handlers = NULL;
3070
2407d77a
MG		 3071 list_add_tail(&new_smi->link, &smi_infos);
3072
3073out_err:
3074 mutex_unlock(&smi_infos_lock);
3075 return rv;
3076}
3077
3078static int try_smi_init(struct smi_info *new_smi)
3079{
3080 int rv = 0;
3081 int i;
3082
279fbd0c 3083 printk(KERN_INFO PFX "Trying %s-specified %s state"
2407d77a
MG		 3084 " machine at %s address 0x%lx, slave address 0x%x,"
3085 " irq %d\n",
3086 ipmi_addr_src_to_str[new_smi->addr_source],
3087 si_to_str[new_smi->si_type],
3088 addr_space_to_str[new_smi->io.addr_type],
3089 new_smi->io.addr_data,
3090 new_smi->slave_addr, new_smi->irq);
3091
b0defcdb
CM		 3092 switch (new_smi->si_type) {
3093 case SI_KCS:
1da177e4 3094 new_smi->handlers = &kcs_smi_handlers;
b0defcdb
CM		 3095 break;
3096
3097 case SI_SMIC:
1da177e4 3098 new_smi->handlers = &smic_smi_handlers;
b0defcdb
CM		 3099 break;
3100
3101 case SI_BT:
1da177e4 3102 new_smi->handlers = &bt_smi_handlers;
b0defcdb
CM		 3103 break;
3104
3105 default:
1da177e4
LT		 3106 /* No support for anything else yet. */
3107 rv = -EIO;
3108 goto out_err;
3109 }
3110
3111 /* Allocate the state machine's data and initialize it. */
3112 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
b0defcdb 3113 if (!new_smi->si_sm) {
279fbd0c
MS		 3114 printk(KERN_ERR PFX
3115 "Could not allocate state machine memory\n");
1da177e4
LT		 3116 rv = -ENOMEM;
3117 goto out_err;
3118 }
3119 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3120 &new_smi->io);
3121
3122 /* Now that we know the I/O size, we can set up the I/O. */
3123 rv = new_smi->io_setup(new_smi);
3124 if (rv) {
279fbd0c 3125 printk(KERN_ERR PFX "Could not set up I/O space\n");
1da177e4
LT		 3126 goto out_err;
3127 }
3128
3129 spin_lock_init(&(new_smi->si_lock));
3130 spin_lock_init(&(new_smi->msg_lock));
1da177e4
LT		 3131
3132 /* Do low-level detection first. */
3133 if (new_smi->handlers->detect(new_smi->si_sm)) {
b0defcdb 3134 if (new_smi->addr_source)
279fbd0c 3135 printk(KERN_INFO PFX "Interface detection failed\n");
1da177e4
LT		 3136 rv = -ENODEV;
3137 goto out_err;
3138 }
3139
c305e3d3
CM		 3140 /*
3141 * Attempt a get device id command. If it fails, we probably
3142 * don't have a BMC here.
3143 */
1da177e4 3144 rv = try_get_dev_id(new_smi);
b0defcdb
CM		 3145 if (rv) {
3146 if (new_smi->addr_source)
279fbd0c 3147 printk(KERN_INFO PFX "There appears to be no BMC"
b0defcdb 3148 " at this location\n");
1da177e4 3149 goto out_err;
b0defcdb 3150 }
1da177e4 3151
3ae0e0f9 3152 setup_oem_data_handler(new_smi);
ea94027b 3153 setup_xaction_handlers(new_smi);
3ae0e0f9 3154
1da177e4
LT		 3155 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3156 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3157 new_smi->curr_msg = NULL;
3158 atomic_set(&new_smi->req_events, 0);
3159 new_smi->run_to_completion = 0;
64959e2d
CM		 3160 for (i = 0; i < SI_NUM_STATS; i++)
3161 atomic_set(&new_smi->stats[i], 0);
1da177e4 3162
ea4078ca 3163 new_smi->interrupt_disabled = 1;
a9a2c44f 3164 atomic_set(&new_smi->stop_operation, 0);
b0defcdb
CM		 3165 new_smi->intf_num = smi_num;
3166 smi_num++;
1da177e4 3167
40112ae7
CM		 3168 rv = try_enable_event_buffer(new_smi);
3169 if (rv == 0)
3170 new_smi->has_event_buffer = 1;
3171
c305e3d3
CM		 3172 /*
3173 * Start clearing the flags before we enable interrupts or the
3174 * timer to avoid racing with the timer.
3175 */
1da177e4
LT		 3176 start_clear_flags(new_smi);
3177 /* IRQ is defined to be set when non-zero. */
3178 if (new_smi->irq)
3179 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3180
50c812b2 3181 if (!new_smi->dev) {
c305e3d3
CM		 3182 /*
3183 * If we don't already have a device from something
3184 * else (like PCI), then register a new one.
3185 */
50c812b2
CM		 3186 new_smi->pdev = platform_device_alloc("ipmi_si",
3187 new_smi->intf_num);
8b32b5d0 3188 if (!new_smi->pdev) {
279fbd0c
MS		 3189 printk(KERN_ERR PFX
3190 "Unable to allocate platform device\n");
453823ba 3191 goto out_err;
50c812b2
CM		 3192 }
3193 new_smi->dev = &new_smi->pdev->dev;
fe2d5ffc 3194 new_smi->dev->driver = &ipmi_driver.driver;
50c812b2 3195
b48f5457 3196 rv = platform_device_add(new_smi->pdev);
50c812b2 3197 if (rv) {
279fbd0c
MS		 3198 printk(KERN_ERR PFX
3199 "Unable to register system interface device:"
50c812b2
CM		 3200 " %d\n",
3201 rv);
453823ba 3202 goto out_err;
50c812b2
CM		 3203 }
3204 new_smi->dev_registered = 1;
3205 }
3206
1da177e4
LT		 3207 rv = ipmi_register_smi(&handlers,
3208 new_smi,
50c812b2
CM		 3209 &new_smi->device_id,
3210 new_smi->dev,
759643b8 3211 "bmc",
453823ba 3212 new_smi->slave_addr);
1da177e4 3213 if (rv) {
279fbd0c
MS		 3214 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3215 rv);
1da177e4
LT		 3216 goto out_err_stop_timer;
3217 }
3218
3219 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
fa68be0d 3220 type_file_read_proc,
99b76233 3221 new_smi);
1da177e4 3222 if (rv) {
279fbd0c 3223 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
1da177e4
LT		 3224 goto out_err_stop_timer;
3225 }
3226
3227 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
fa68be0d 3228 stat_file_read_proc,
99b76233 3229 new_smi);
1da177e4 3230 if (rv) {
279fbd0c 3231 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
1da177e4
LT		 3232 goto out_err_stop_timer;
3233 }
3234
b361e27b 3235 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
fa68be0d 3236 param_read_proc,
99b76233 3237 new_smi);
b361e27b 3238 if (rv) {
279fbd0c 3239 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
b361e27b
CM		 3240 goto out_err_stop_timer;
3241 }
3242
279fbd0c
MS		 3243 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3244 si_to_str[new_smi->si_type]);
1da177e4
LT		 3245
3246 return 0;
3247
3248 out_err_stop_timer:
a9a2c44f
CM		 3249 atomic_inc(&new_smi->stop_operation);
3250 wait_for_timer_and_thread(new_smi);
1da177e4
LT		 3251
3252 out_err:
2407d77a
MG		 3253 new_smi->interrupt_disabled = 1;
3254
3255 if (new_smi->intf) {
1da177e4 3256 ipmi_unregister_smi(new_smi->intf);
2407d77a
MG		 3257 new_smi->intf = NULL;
3258 }
1da177e4 3259
2407d77a 3260 if (new_smi->irq_cleanup) {
b0defcdb 3261 new_smi->irq_cleanup(new_smi);
2407d77a
MG		 3262 new_smi->irq_cleanup = NULL;
3263 }
1da177e4 3264
c305e3d3
CM		 3265 /*
3266 * Wait until we know that we are out of any interrupt
3267 * handlers might have been running before we freed the
3268 * interrupt.
3269 */
fbd568a3 3270 synchronize_sched();
1da177e4
LT		 3271
3272 if (new_smi->si_sm) {
3273 if (new_smi->handlers)
3274 new_smi->handlers->cleanup(new_smi->si_sm);
3275 kfree(new_smi->si_sm);
2407d77a 3276 new_smi->si_sm = NULL;
1da177e4 3277 }
2407d77a 3278 if (new_smi->addr_source_cleanup) {
b0defcdb 3279 new_smi->addr_source_cleanup(new_smi);
2407d77a
MG		 3280 new_smi->addr_source_cleanup = NULL;
3281 }
3282 if (new_smi->io_cleanup) {
7767e126 3283 new_smi->io_cleanup(new_smi);
2407d77a
MG		 3284 new_smi->io_cleanup = NULL;
3285 }
1da177e4 3286
2407d77a 3287 if (new_smi->dev_registered) {
50c812b2 3288 platform_device_unregister(new_smi->pdev);
2407d77a
MG		 3289 new_smi->dev_registered = 0;
3290 }
b0defcdb 3291
1da177e4
LT		 3292 return rv;
3293}
3294
b0defcdb 3295static __devinit int init_ipmi_si(void)
1da177e4 3296{
1da177e4
LT		 3297 int i;
3298 char *str;
50c812b2 3299 int rv;
2407d77a 3300 struct smi_info *e;
06ee4594 3301 enum ipmi_addr_src type = SI_INVALID;
1da177e4
LT		 3302
3303 if (initialized)
3304 return 0;
3305 initialized = 1;
3306
50c812b2 3307 /* Register the device drivers. */
fe2d5ffc 3308 rv = driver_register(&ipmi_driver.driver);
50c812b2 3309 if (rv) {
279fbd0c 3310 printk(KERN_ERR PFX "Unable to register driver: %d\n", rv);
50c812b2
CM		 3311 return rv;
3312 }
3313
3314
1da177e4
LT		 3315 /* Parse out the si_type string into its components. */
3316 str = si_type_str;
3317 if (*str != '\0') {
e8b33617 3318 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
1da177e4
LT		 3319 si_type[i] = str;
3320 str = strchr(str, ',');
3321 if (str) {
3322 *str = '\0';
3323 str++;
3324 } else {
3325 break;
3326 }
3327 }
3328 }
3329
1fdd75bd 3330 printk(KERN_INFO "IPMI System Interface driver.\n");
1da177e4 3331
b0defcdb
CM		 3332 hardcode_find_bmc();
3333
d8cc5267
MG		 3334 /* If the user gave us a device, they presumably want us to use it */
3335 mutex_lock(&smi_infos_lock);
3336 if (!list_empty(&smi_infos)) {
3337 mutex_unlock(&smi_infos_lock);
3338 return 0;
3339 }
3340 mutex_unlock(&smi_infos_lock);
3341
b0defcdb 3342#ifdef CONFIG_PCI
168b35a7 3343 rv = pci_register_driver(&ipmi_pci_driver);
c305e3d3 3344 if (rv)
279fbd0c 3345 printk(KERN_ERR PFX "Unable to register PCI driver: %d\n", rv);
56480287
MG		 3346 else
3347 pci_registered = 1;
b0defcdb
CM		 3348#endif
3349
754d4531
MG		 3350#ifdef CONFIG_ACPI
3351 pnp_register_driver(&ipmi_pnp_driver);
3352#endif
3353
3354#ifdef CONFIG_DMI
3355 dmi_find_bmc();
3356#endif
3357
3358#ifdef CONFIG_ACPI
3359 spmi_find_bmc();
3360#endif
3361
dba9b4f6
CM		 3362#ifdef CONFIG_PPC_OF
3363 of_register_platform_driver(&ipmi_of_platform_driver);
56480287 3364 of_registered = 1;
dba9b4f6
CM		 3365#endif
3366
06ee4594
MG		 3367 /* We prefer devices with interrupts, but in the case of a machine
3368 with multiple BMCs we assume that there will be several instances
3369 of a given type so if we succeed in registering a type then also
3370 try to register everything else of the same type */
d8cc5267 3371
2407d77a
MG		 3372 mutex_lock(&smi_infos_lock);
3373 list_for_each_entry(e, &smi_infos, link) {
06ee4594
MG		 3374 /* Try to register a device if it has an IRQ and we either
3375 haven't successfully registered a device yet or this
3376 device has the same type as one we successfully registered */
3377 if (e->irq && (!type || e->addr_source == type)) {
d8cc5267 3378 if (!try_smi_init(e)) {
06ee4594 3379 type = e->addr_source;
d8cc5267
MG		 3380 }
3381 }
3382 }
3383
06ee4594
MG		 3384 /* type will only have been set if we successfully registered an si */
3385 if (type) {
3386 mutex_unlock(&smi_infos_lock);
3387 return 0;
3388 }
3389
d8cc5267
MG		 3390 /* Fall back to the preferred device */
3391
3392 list_for_each_entry(e, &smi_infos, link) {
06ee4594 3393 if (!e->irq && (!type || e->addr_source == type)) {
d8cc5267 3394 if (!try_smi_init(e)) {
06ee4594 3395 type = e->addr_source;
d8cc5267
MG		 3396 }
3397 }
2407d77a
MG		 3398 }
3399 mutex_unlock(&smi_infos_lock);
3400
06ee4594
MG		 3401 if (type)
3402 return 0;
3403
b0defcdb 3404 if (si_trydefaults) {
d6dfd131 3405 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 3406 if (list_empty(&smi_infos)) {
3407 /* No BMC was found, try defaults. */
d6dfd131 3408 mutex_unlock(&smi_infos_lock);
b0defcdb 3409 default_find_bmc();
2407d77a 3410 } else
d6dfd131 3411 mutex_unlock(&smi_infos_lock);
1da177e4
LT		 3412 }
3413
d6dfd131 3414 mutex_lock(&smi_infos_lock);
b361e27b 3415 if (unload_when_empty && list_empty(&smi_infos)) {
d6dfd131 3416 mutex_unlock(&smi_infos_lock);
b0defcdb 3417#ifdef CONFIG_PCI
56480287
MG		 3418 if (pci_registered)
3419 pci_unregister_driver(&ipmi_pci_driver);
b0defcdb 3420#endif
10fb62e5
CK		 3421
3422#ifdef CONFIG_PPC_OF
56480287
MG		 3423 if (of_registered)
3424 of_unregister_platform_driver(&ipmi_of_platform_driver);
10fb62e5 3425#endif
fe2d5ffc 3426 driver_unregister(&ipmi_driver.driver);
279fbd0c
MS		 3427 printk(KERN_WARNING PFX
3428 "Unable to find any System Interface(s)\n");
1da177e4 3429 return -ENODEV;
b0defcdb 3430 } else {
d6dfd131 3431 mutex_unlock(&smi_infos_lock);
b0defcdb 3432 return 0;
1da177e4 3433 }
1da177e4
LT		 3434}
3435module_init(init_ipmi_si);
3436
b361e27b 3437static void cleanup_one_si(struct smi_info *to_clean)
1da177e4 3438{
2407d77a 3439 int rv = 0;
1da177e4
LT		 3440 unsigned long flags;
3441
b0defcdb 3442 if (!to_clean)
1da177e4
LT		 3443 return;
3444
b0defcdb
CM		 3445 list_del(&to_clean->link);
3446
ee6cd5f8 3447 /* Tell the driver that we are shutting down. */
a9a2c44f 3448 atomic_inc(&to_clean->stop_operation);
b0defcdb 3449
c305e3d3
CM		 3450 /*
3451 * Make sure the timer and thread are stopped and will not run
3452 * again.
3453 */
a9a2c44f 3454 wait_for_timer_and_thread(to_clean);
1da177e4 3455
c305e3d3
CM		 3456 /*
3457 * Timeouts are stopped, now make sure the interrupts are off
3458 * for the device. A little tricky with locks to make sure
3459 * there are no races.
3460 */
ee6cd5f8
CM		 3461 spin_lock_irqsave(&to_clean->si_lock, flags);
3462 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3463 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3464 poll(to_clean);
3465 schedule_timeout_uninterruptible(1);
3466 spin_lock_irqsave(&to_clean->si_lock, flags);
3467 }
3468 disable_si_irq(to_clean);
3469 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3470 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3471 poll(to_clean);
3472 schedule_timeout_uninterruptible(1);
3473 }
3474
3475 /* Clean up interrupts and make sure that everything is done. */
3476 if (to_clean->irq_cleanup)
3477 to_clean->irq_cleanup(to_clean);
e8b33617 3478 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
1da177e4 3479 poll(to_clean);
da4cd8df 3480 schedule_timeout_uninterruptible(1);
1da177e4
LT		 3481 }
3482
2407d77a
MG		 3483 if (to_clean->intf)
3484 rv = ipmi_unregister_smi(to_clean->intf);
3485
1da177e4 3486 if (rv) {
279fbd0c 3487 printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n",
1da177e4
LT		 3488 rv);
3489 }
3490
2407d77a
MG		 3491 if (to_clean->handlers)
3492 to_clean->handlers->cleanup(to_clean->si_sm);
1da177e4
LT		 3493
3494 kfree(to_clean->si_sm);
3495
b0defcdb
CM		 3496 if (to_clean->addr_source_cleanup)
3497 to_clean->addr_source_cleanup(to_clean);
7767e126
PG		 3498 if (to_clean->io_cleanup)
3499 to_clean->io_cleanup(to_clean);
50c812b2
CM		 3500
3501 if (to_clean->dev_registered)
3502 platform_device_unregister(to_clean->pdev);
3503
3504 kfree(to_clean);
1da177e4
LT		 3505}
3506
3507static __exit void cleanup_ipmi_si(void)
3508{
b0defcdb 3509 struct smi_info *e, *tmp_e;
1da177e4 3510
b0defcdb 3511 if (!initialized)
1da177e4
LT		 3512 return;
3513
b0defcdb 3514#ifdef CONFIG_PCI
56480287
MG		 3515 if (pci_registered)
3516 pci_unregister_driver(&ipmi_pci_driver);
b0defcdb 3517#endif
27d0567a 3518#ifdef CONFIG_ACPI
9e368fa0
BH		 3519 pnp_unregister_driver(&ipmi_pnp_driver);
3520#endif
b0defcdb 3521
dba9b4f6 3522#ifdef CONFIG_PPC_OF
56480287
MG		 3523 if (of_registered)
3524 of_unregister_platform_driver(&ipmi_of_platform_driver);
dba9b4f6
CM		 3525#endif
3526
d6dfd131 3527 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 3528 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3529 cleanup_one_si(e);
d6dfd131 3530 mutex_unlock(&smi_infos_lock);
50c812b2 3531
fe2d5ffc 3532 driver_unregister(&ipmi_driver.driver);
1da177e4
LT		 3533}
3534module_exit(cleanup_ipmi_si);
3535
3536MODULE_LICENSE("GPL");
1fdd75bd 3537MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
c305e3d3
CM		 3538MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3539 " system interfaces.");
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