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ipmi: use USEC_PER_SEC instead of 1000000 for more meaningful
[linux-2.6-block.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>
1da177e4 44#include <linux/sched.h>
07412736 45#include <linux/seq_file.h>
1da177e4
LT		 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>
16f4232c 60#include <linux/ipmi.h>
1da177e4
LT		 61#include <linux/ipmi_smi.h>
62#include <asm/io.h>
63#include "ipmi_si_sm.h"
64#include <linux/init.h>
b224cd3a 65#include <linux/dmi.h>
b361e27b
CM		 66#include <linux/string.h>
67#include <linux/ctype.h>
9e368fa0 68#include <linux/pnp.h>
11c675ce
SR		 69#include <linux/of_device.h>
70#include <linux/of_platform.h>
672d8eaf
RH		 71#include <linux/of_address.h>
72#include <linux/of_irq.h>
dba9b4f6 73
fdbeb7de
TB		 74#ifdef CONFIG_PARISC
75#include <asm/hardware.h> /* for register_parisc_driver() stuff */
76#include <asm/parisc-device.h>
77#endif
78
b361e27b 79#define PFX "ipmi_si: "
1da177e4
LT		 80
81/* Measure times between events in the driver. */
82#undef DEBUG_TIMING
83
84/* Call every 10 ms. */
85#define SI_TIMEOUT_TIME_USEC 10000
86#define SI_USEC_PER_JIFFY (1000000/HZ)
87#define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
88#define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
c305e3d3 89 short timeout */
1da177e4
LT		 90
91enum si_intf_state {
92 SI_NORMAL,
93 SI_GETTING_FLAGS,
94 SI_GETTING_EVENTS,
95 SI_CLEARING_FLAGS,
96 SI_CLEARING_FLAGS_THEN_SET_IRQ,
97 SI_GETTING_MESSAGES,
98 SI_ENABLE_INTERRUPTS1,
ee6cd5f8
CM		 99 SI_ENABLE_INTERRUPTS2,
100 SI_DISABLE_INTERRUPTS1,
101 SI_DISABLE_INTERRUPTS2
1da177e4
LT		 102 /* FIXME - add watchdog stuff. */
103};
104
9dbf68f9
CM		 105/* Some BT-specific defines we need here. */
106#define IPMI_BT_INTMASK_REG 2
107#define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
108#define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
109
1da177e4
LT		 110enum si_type {
111 SI_KCS, SI_SMIC, SI_BT
112};
b361e27b 113static char *si_to_str[] = { "kcs", "smic", "bt" };
1da177e4 114
5fedc4a2
MG		 115static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI",
116 "ACPI", "SMBIOS", "PCI",
117 "device-tree", "default" };
118
50c812b2
CM		 119#define DEVICE_NAME "ipmi_si"
120
a1e9c9dd 121static struct platform_driver ipmi_driver;
64959e2d
CM		 122
123/*
124 * Indexes into stats[] in smi_info below.
125 */
ba8ff1c6
CM		 126enum si_stat_indexes {
127 /*
128 * Number of times the driver requested a timer while an operation
129 * was in progress.
130 */
131 SI_STAT_short_timeouts = 0,
132
133 /*
134 * Number of times the driver requested a timer while nothing was in
135 * progress.
136 */
137 SI_STAT_long_timeouts,
138
139 /* Number of times the interface was idle while being polled. */
140 SI_STAT_idles,
141
142 /* Number of interrupts the driver handled. */
143 SI_STAT_interrupts,
144
145 /* Number of time the driver got an ATTN from the hardware. */
146 SI_STAT_attentions,
64959e2d 147
ba8ff1c6
CM		 148 /* Number of times the driver requested flags from the hardware. */
149 SI_STAT_flag_fetches,
150
151 /* Number of times the hardware didn't follow the state machine. */
152 SI_STAT_hosed_count,
153
154 /* Number of completed messages. */
155 SI_STAT_complete_transactions,
156
157 /* Number of IPMI events received from the hardware. */
158 SI_STAT_events,
159
160 /* Number of watchdog pretimeouts. */
161 SI_STAT_watchdog_pretimeouts,
162
b3834be5 163 /* Number of asynchronous messages received. */
ba8ff1c6
CM		 164 SI_STAT_incoming_messages,
165
166
167 /* This *must* remain last, add new values above this. */
168 SI_NUM_STATS
169};
64959e2d 170
c305e3d3 171struct smi_info {
a9a2c44f 172 int intf_num;
1da177e4
LT		 173 ipmi_smi_t intf;
174 struct si_sm_data *si_sm;
175 struct si_sm_handlers *handlers;
176 enum si_type si_type;
177 spinlock_t si_lock;
1da177e4
LT		 178 struct list_head xmit_msgs;
179 struct list_head hp_xmit_msgs;
180 struct ipmi_smi_msg *curr_msg;
181 enum si_intf_state si_state;
182
c305e3d3
CM		 183 /*
184 * Used to handle the various types of I/O that can occur with
185 * IPMI
186 */
1da177e4
LT		 187 struct si_sm_io io;
188 int (*io_setup)(struct smi_info *info);
189 void (*io_cleanup)(struct smi_info *info);
190 int (*irq_setup)(struct smi_info *info);
191 void (*irq_cleanup)(struct smi_info *info);
192 unsigned int io_size;
5fedc4a2 193 enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
b0defcdb
CM		 194 void (*addr_source_cleanup)(struct smi_info *info);
195 void *addr_source_data;
1da177e4 196
c305e3d3
CM		 197 /*
198 * Per-OEM handler, called from handle_flags(). Returns 1
199 * when handle_flags() needs to be re-run or 0 indicating it
200 * set si_state itself.
201 */
3ae0e0f9
CM		 202 int (*oem_data_avail_handler)(struct smi_info *smi_info);
203
c305e3d3
CM		 204 /*
205 * Flags from the last GET_MSG_FLAGS command, used when an ATTN
206 * is set to hold the flags until we are done handling everything
207 * from the flags.
208 */
1da177e4
LT		 209#define RECEIVE_MSG_AVAIL 0x01
210#define EVENT_MSG_BUFFER_FULL 0x02
211#define WDT_PRE_TIMEOUT_INT 0x08
3ae0e0f9
CM		 212#define OEM0_DATA_AVAIL 0x20
213#define OEM1_DATA_AVAIL 0x40
214#define OEM2_DATA_AVAIL 0x80
215#define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
c305e3d3
CM		 216 OEM1_DATA_AVAIL | \
217 OEM2_DATA_AVAIL)
1da177e4
LT		 218 unsigned char msg_flags;
219
40112ae7
CM		 220 /* Does the BMC have an event buffer? */
221 char has_event_buffer;
222
c305e3d3
CM		 223 /*
224 * If set to true, this will request events the next time the
225 * state machine is idle.
226 */
1da177e4
LT		 227 atomic_t req_events;
228
c305e3d3
CM		 229 /*
230 * If true, run the state machine to completion on every send
231 * call. Generally used after a panic to make sure stuff goes
232 * out.
233 */
1da177e4
LT		 234 int run_to_completion;
235
236 /* The I/O port of an SI interface. */
237 int port;
238
c305e3d3
CM		 239 /*
240 * The space between start addresses of the two ports. For
241 * instance, if the first port is 0xca2 and the spacing is 4, then
242 * the second port is 0xca6.
243 */
1da177e4
LT		 244 unsigned int spacing;
245
246 /* zero if no irq; */
247 int irq;
248
249 /* The timer for this si. */
250 struct timer_list si_timer;
251
252 /* The time (in jiffies) the last timeout occurred at. */
253 unsigned long last_timeout_jiffies;
254
255 /* Used to gracefully stop the timer without race conditions. */
a9a2c44f 256 atomic_t stop_operation;
1da177e4 257
c305e3d3
CM		 258 /*
259 * The driver will disable interrupts when it gets into a
260 * situation where it cannot handle messages due to lack of
261 * memory. Once that situation clears up, it will re-enable
262 * interrupts.
263 */
1da177e4
LT		 264 int interrupt_disabled;
265
50c812b2 266 /* From the get device id response... */
3ae0e0f9 267 struct ipmi_device_id device_id;
1da177e4 268
50c812b2
CM		 269 /* Driver model stuff. */
270 struct device *dev;
271 struct platform_device *pdev;
272
c305e3d3
CM		 273 /*
274 * True if we allocated the device, false if it came from
275 * someplace else (like PCI).
276 */
50c812b2
CM		 277 int dev_registered;
278
1da177e4
LT		 279 /* Slave address, could be reported from DMI. */
280 unsigned char slave_addr;
281
282 /* Counters and things for the proc filesystem. */
64959e2d 283 atomic_t stats[SI_NUM_STATS];
a9a2c44f 284
c305e3d3 285 struct task_struct *thread;
b0defcdb
CM		 286
287 struct list_head link;
16f4232c 288 union ipmi_smi_info_union addr_info;
1da177e4
LT		 289};
290
64959e2d
CM		 291#define smi_inc_stat(smi, stat) \
292 atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
293#define smi_get_stat(smi, stat) \
294 ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
295
a51f4a81
CM		 296#define SI_MAX_PARMS 4
297
298static int force_kipmid[SI_MAX_PARMS];
299static int num_force_kipmid;
56480287
MG		 300#ifdef CONFIG_PCI
301static int pci_registered;
302#endif
561f8182
YL		 303#ifdef CONFIG_ACPI
304static int pnp_registered;
305#endif
fdbeb7de
TB		 306#ifdef CONFIG_PARISC
307static int parisc_registered;
308#endif
a51f4a81 309
ae74e823
MW		 310static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
311static int num_max_busy_us;
312
b361e27b
CM		 313static int unload_when_empty = 1;
314
2407d77a 315static int add_smi(struct smi_info *smi);
b0defcdb 316static int try_smi_init(struct smi_info *smi);
b361e27b 317static void cleanup_one_si(struct smi_info *to_clean);
d2478521 318static void cleanup_ipmi_si(void);
b0defcdb 319
e041c683 320static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
c305e3d3 321static int register_xaction_notifier(struct notifier_block *nb)
ea94027b 322{
e041c683 323 return atomic_notifier_chain_register(&xaction_notifier_list, nb);
ea94027b
CM		 324}
325
1da177e4
LT		 326static void deliver_recv_msg(struct smi_info *smi_info,
327 struct ipmi_smi_msg *msg)
328{
7adf579c
CM		 329 /* Deliver the message to the upper layer. */
330 ipmi_smi_msg_received(smi_info->intf, msg);
1da177e4
LT		 331}
332
4d7cbac7 333static void return_hosed_msg(struct smi_info *smi_info, int cCode)
1da177e4
LT		 334{
335 struct ipmi_smi_msg *msg = smi_info->curr_msg;
336
4d7cbac7
CM		 337 if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
338 cCode = IPMI_ERR_UNSPECIFIED;
339 /* else use it as is */
340
25985edc 341 /* Make it a response */
1da177e4
LT		 342 msg->rsp[0] = msg->data[0] | 4;
343 msg->rsp[1] = msg->data[1];
4d7cbac7 344 msg->rsp[2] = cCode;
1da177e4
LT		 345 msg->rsp_size = 3;
346
347 smi_info->curr_msg = NULL;
348 deliver_recv_msg(smi_info, msg);
349}
350
351static enum si_sm_result start_next_msg(struct smi_info *smi_info)
352{
353 int rv;
354 struct list_head *entry = NULL;
355#ifdef DEBUG_TIMING
356 struct timeval t;
357#endif
358
1da177e4 359 /* Pick the high priority queue first. */
b0defcdb 360 if (!list_empty(&(smi_info->hp_xmit_msgs))) {
1da177e4 361 entry = smi_info->hp_xmit_msgs.next;
b0defcdb 362 } else if (!list_empty(&(smi_info->xmit_msgs))) {
1da177e4
LT		 363 entry = smi_info->xmit_msgs.next;
364 }
365
b0defcdb 366 if (!entry) {
1da177e4
LT		 367 smi_info->curr_msg = NULL;
368 rv = SI_SM_IDLE;
369 } else {
370 int err;
371
372 list_del(entry);
373 smi_info->curr_msg = list_entry(entry,
374 struct ipmi_smi_msg,
375 link);
376#ifdef DEBUG_TIMING
377 do_gettimeofday(&t);
c305e3d3 378 printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4 379#endif
e041c683
AS		 380 err = atomic_notifier_call_chain(&xaction_notifier_list,
381 0, smi_info);
ea94027b
CM		 382 if (err & NOTIFY_STOP_MASK) {
383 rv = SI_SM_CALL_WITHOUT_DELAY;
384 goto out;
385 }
1da177e4
LT		 386 err = smi_info->handlers->start_transaction(
387 smi_info->si_sm,
388 smi_info->curr_msg->data,
389 smi_info->curr_msg->data_size);
c305e3d3 390 if (err)
4d7cbac7 391 return_hosed_msg(smi_info, err);
1da177e4
LT		 392
393 rv = SI_SM_CALL_WITHOUT_DELAY;
394 }
c305e3d3 395 out:
1da177e4
LT		 396 return rv;
397}
398
399static void start_enable_irq(struct smi_info *smi_info)
400{
401 unsigned char msg[2];
402
c305e3d3
CM		 403 /*
404 * If we are enabling interrupts, we have to tell the
405 * BMC to use them.
406 */
1da177e4
LT		 407 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
408 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
409
410 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
411 smi_info->si_state = SI_ENABLE_INTERRUPTS1;
412}
413
ee6cd5f8
CM		 414static void start_disable_irq(struct smi_info *smi_info)
415{
416 unsigned char msg[2];
417
418 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
419 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
420
421 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
422 smi_info->si_state = SI_DISABLE_INTERRUPTS1;
423}
424
1da177e4
LT		 425static void start_clear_flags(struct smi_info *smi_info)
426{
427 unsigned char msg[3];
428
429 /* Make sure the watchdog pre-timeout flag is not set at startup. */
430 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
431 msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
432 msg[2] = WDT_PRE_TIMEOUT_INT;
433
434 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
435 smi_info->si_state = SI_CLEARING_FLAGS;
436}
437
c305e3d3
CM		 438/*
439 * When we have a situtaion where we run out of memory and cannot
440 * allocate messages, we just leave them in the BMC and run the system
441 * polled until we can allocate some memory. Once we have some
442 * memory, we will re-enable the interrupt.
443 */
1da177e4
LT		 444static inline void disable_si_irq(struct smi_info *smi_info)
445{
b0defcdb 446 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
ee6cd5f8 447 start_disable_irq(smi_info);
1da177e4 448 smi_info->interrupt_disabled = 1;
ea4078ca
MG		 449 if (!atomic_read(&smi_info->stop_operation))
450 mod_timer(&smi_info->si_timer,
451 jiffies + SI_TIMEOUT_JIFFIES);
1da177e4
LT		 452 }
453}
454
455static inline void enable_si_irq(struct smi_info *smi_info)
456{
457 if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
ee6cd5f8 458 start_enable_irq(smi_info);
1da177e4
LT		 459 smi_info->interrupt_disabled = 0;
460 }
461}
462
463static void handle_flags(struct smi_info *smi_info)
464{
3ae0e0f9 465 retry:
1da177e4
LT		 466 if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
467 /* Watchdog pre-timeout */
64959e2d 468 smi_inc_stat(smi_info, watchdog_pretimeouts);
1da177e4
LT		 469
470 start_clear_flags(smi_info);
471 smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
1da177e4 472 ipmi_smi_watchdog_pretimeout(smi_info->intf);
1da177e4
LT		 473 } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
474 /* Messages available. */
475 smi_info->curr_msg = ipmi_alloc_smi_msg();
b0defcdb 476 if (!smi_info->curr_msg) {
1da177e4
LT		 477 disable_si_irq(smi_info);
478 smi_info->si_state = SI_NORMAL;
479 return;
480 }
481 enable_si_irq(smi_info);
482
483 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
484 smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
485 smi_info->curr_msg->data_size = 2;
486
487 smi_info->handlers->start_transaction(
488 smi_info->si_sm,
489 smi_info->curr_msg->data,
490 smi_info->curr_msg->data_size);
491 smi_info->si_state = SI_GETTING_MESSAGES;
492 } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
493 /* Events available. */
494 smi_info->curr_msg = ipmi_alloc_smi_msg();
b0defcdb 495 if (!smi_info->curr_msg) {
1da177e4
LT		 496 disable_si_irq(smi_info);
497 smi_info->si_state = SI_NORMAL;
498 return;
499 }
500 enable_si_irq(smi_info);
501
502 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
503 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
504 smi_info->curr_msg->data_size = 2;
505
506 smi_info->handlers->start_transaction(
507 smi_info->si_sm,
508 smi_info->curr_msg->data,
509 smi_info->curr_msg->data_size);
510 smi_info->si_state = SI_GETTING_EVENTS;
4064d5ef 511 } else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
c305e3d3 512 smi_info->oem_data_avail_handler) {
4064d5ef
CM		 513 if (smi_info->oem_data_avail_handler(smi_info))
514 goto retry;
c305e3d3 515 } else
1da177e4 516 smi_info->si_state = SI_NORMAL;
1da177e4
LT		 517}
518
519static void handle_transaction_done(struct smi_info *smi_info)
520{
521 struct ipmi_smi_msg *msg;
522#ifdef DEBUG_TIMING
523 struct timeval t;
524
525 do_gettimeofday(&t);
c305e3d3 526 printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 527#endif
528 switch (smi_info->si_state) {
529 case SI_NORMAL:
b0defcdb 530 if (!smi_info->curr_msg)
1da177e4
LT		 531 break;
532
533 smi_info->curr_msg->rsp_size
534 = smi_info->handlers->get_result(
535 smi_info->si_sm,
536 smi_info->curr_msg->rsp,
537 IPMI_MAX_MSG_LENGTH);
538
c305e3d3
CM		 539 /*
540 * Do this here becase deliver_recv_msg() releases the
541 * lock, and a new message can be put in during the
542 * time the lock is released.
543 */
1da177e4
LT		 544 msg = smi_info->curr_msg;
545 smi_info->curr_msg = NULL;
546 deliver_recv_msg(smi_info, msg);
547 break;
548
549 case SI_GETTING_FLAGS:
550 {
551 unsigned char msg[4];
552 unsigned int len;
553
554 /* We got the flags from the SMI, now handle them. */
555 len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
556 if (msg[2] != 0) {
c305e3d3 557 /* Error fetching flags, just give up for now. */
1da177e4
LT		 558 smi_info->si_state = SI_NORMAL;
559 } else if (len < 4) {
c305e3d3
CM		 560 /*
561 * Hmm, no flags. That's technically illegal, but
562 * don't use uninitialized data.
563 */
1da177e4
LT		 564 smi_info->si_state = SI_NORMAL;
565 } else {
566 smi_info->msg_flags = msg[3];
567 handle_flags(smi_info);
568 }
569 break;
570 }
571
572 case SI_CLEARING_FLAGS:
573 case SI_CLEARING_FLAGS_THEN_SET_IRQ:
574 {
575 unsigned char msg[3];
576
577 /* We cleared the flags. */
578 smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
579 if (msg[2] != 0) {
580 /* Error clearing flags */
279fbd0c
MS		 581 dev_warn(smi_info->dev,
582 "Error clearing flags: %2.2x\n", msg[2]);
1da177e4
LT		 583 }
584 if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ)
585 start_enable_irq(smi_info);
586 else
587 smi_info->si_state = SI_NORMAL;
588 break;
589 }
590
591 case SI_GETTING_EVENTS:
592 {
593 smi_info->curr_msg->rsp_size
594 = smi_info->handlers->get_result(
595 smi_info->si_sm,
596 smi_info->curr_msg->rsp,
597 IPMI_MAX_MSG_LENGTH);
598
c305e3d3
CM		 599 /*
600 * Do this here becase deliver_recv_msg() releases the
601 * lock, and a new message can be put in during the
602 * time the lock is released.
603 */
1da177e4
LT		 604 msg = smi_info->curr_msg;
605 smi_info->curr_msg = NULL;
606 if (msg->rsp[2] != 0) {
607 /* Error getting event, probably done. */
608 msg->done(msg);
609
610 /* Take off the event flag. */
611 smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
612 handle_flags(smi_info);
613 } else {
64959e2d 614 smi_inc_stat(smi_info, events);
1da177e4 615
c305e3d3
CM		 616 /*
617 * Do this before we deliver the message
618 * because delivering the message releases the
619 * lock and something else can mess with the
620 * state.
621 */
1da177e4
LT		 622 handle_flags(smi_info);
623
624 deliver_recv_msg(smi_info, msg);
625 }
626 break;
627 }
628
629 case SI_GETTING_MESSAGES:
630 {
631 smi_info->curr_msg->rsp_size
632 = smi_info->handlers->get_result(
633 smi_info->si_sm,
634 smi_info->curr_msg->rsp,
635 IPMI_MAX_MSG_LENGTH);
636
c305e3d3
CM		 637 /*
638 * Do this here becase deliver_recv_msg() releases the
639 * lock, and a new message can be put in during the
640 * time the lock is released.
641 */
1da177e4
LT		 642 msg = smi_info->curr_msg;
643 smi_info->curr_msg = NULL;
644 if (msg->rsp[2] != 0) {
645 /* Error getting event, probably done. */
646 msg->done(msg);
647
648 /* Take off the msg flag. */
649 smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
650 handle_flags(smi_info);
651 } else {
64959e2d 652 smi_inc_stat(smi_info, incoming_messages);
1da177e4 653
c305e3d3
CM		 654 /*
655 * Do this before we deliver the message
656 * because delivering the message releases the
657 * lock and something else can mess with the
658 * state.
659 */
1da177e4
LT		 660 handle_flags(smi_info);
661
662 deliver_recv_msg(smi_info, msg);
663 }
664 break;
665 }
666
667 case SI_ENABLE_INTERRUPTS1:
668 {
669 unsigned char msg[4];
670
671 /* We got the flags from the SMI, now handle them. */
672 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
673 if (msg[2] != 0) {
0849bfec
CM		 674 dev_warn(smi_info->dev,
675 "Couldn't get irq info: %x.\n", msg[2]);
676 dev_warn(smi_info->dev,
677 "Maybe ok, but ipmi might run very slowly.\n");
1da177e4
LT		 678 smi_info->si_state = SI_NORMAL;
679 } else {
680 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
681 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
ee6cd5f8
CM		 682 msg[2] = (msg[3] |
683 IPMI_BMC_RCV_MSG_INTR |
684 IPMI_BMC_EVT_MSG_INTR);
1da177e4
LT		 685 smi_info->handlers->start_transaction(
686 smi_info->si_sm, msg, 3);
687 smi_info->si_state = SI_ENABLE_INTERRUPTS2;
688 }
689 break;
690 }
691
692 case SI_ENABLE_INTERRUPTS2:
693 {
694 unsigned char msg[4];
695
696 /* We got the flags from the SMI, now handle them. */
697 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
0849bfec
CM		 698 if (msg[2] != 0) {
699 dev_warn(smi_info->dev,
700 "Couldn't set irq info: %x.\n", msg[2]);
701 dev_warn(smi_info->dev,
702 "Maybe ok, but ipmi might run very slowly.\n");
703 } else
ea4078ca 704 smi_info->interrupt_disabled = 0;
1da177e4
LT		 705 smi_info->si_state = SI_NORMAL;
706 break;
707 }
ee6cd5f8
CM		 708
709 case SI_DISABLE_INTERRUPTS1:
710 {
711 unsigned char msg[4];
712
713 /* We got the flags from the SMI, now handle them. */
714 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
715 if (msg[2] != 0) {
279fbd0c
MS		 716 dev_warn(smi_info->dev, "Could not disable interrupts"
717 ", failed get.\n");
ee6cd5f8
CM		 718 smi_info->si_state = SI_NORMAL;
719 } else {
720 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
721 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
722 msg[2] = (msg[3] &
723 ~(IPMI_BMC_RCV_MSG_INTR |
724 IPMI_BMC_EVT_MSG_INTR));
725 smi_info->handlers->start_transaction(
726 smi_info->si_sm, msg, 3);
727 smi_info->si_state = SI_DISABLE_INTERRUPTS2;
728 }
729 break;
730 }
731
732 case SI_DISABLE_INTERRUPTS2:
733 {
734 unsigned char msg[4];
735
736 /* We got the flags from the SMI, now handle them. */
737 smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
738 if (msg[2] != 0) {
279fbd0c
MS		 739 dev_warn(smi_info->dev, "Could not disable interrupts"
740 ", failed set.\n");
ee6cd5f8
CM		 741 }
742 smi_info->si_state = SI_NORMAL;
743 break;
744 }
1da177e4
LT		 745 }
746}
747
c305e3d3
CM		 748/*
749 * Called on timeouts and events. Timeouts should pass the elapsed
750 * time, interrupts should pass in zero. Must be called with
751 * si_lock held and interrupts disabled.
752 */
1da177e4
LT		 753static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
754 int time)
755{
756 enum si_sm_result si_sm_result;
757
758 restart:
c305e3d3
CM		 759 /*
760 * There used to be a loop here that waited a little while
761 * (around 25us) before giving up. That turned out to be
762 * pointless, the minimum delays I was seeing were in the 300us
763 * range, which is far too long to wait in an interrupt. So
764 * we just run until the state machine tells us something
765 * happened or it needs a delay.
766 */
1da177e4
LT		 767 si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
768 time = 0;
769 while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
1da177e4 770 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
1da177e4 771
c305e3d3 772 if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
64959e2d 773 smi_inc_stat(smi_info, complete_transactions);
1da177e4
LT		 774
775 handle_transaction_done(smi_info);
776 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
c305e3d3 777 } else if (si_sm_result == SI_SM_HOSED) {
64959e2d 778 smi_inc_stat(smi_info, hosed_count);
1da177e4 779
c305e3d3
CM		 780 /*
781 * Do the before return_hosed_msg, because that
782 * releases the lock.
783 */
1da177e4
LT		 784 smi_info->si_state = SI_NORMAL;
785 if (smi_info->curr_msg != NULL) {
c305e3d3
CM		 786 /*
787 * If we were handling a user message, format
788 * a response to send to the upper layer to
789 * tell it about the error.
790 */
4d7cbac7 791 return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
1da177e4
LT		 792 }
793 si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
794 }
795
4ea18425
CM		 796 /*
797 * We prefer handling attn over new messages. But don't do
798 * this if there is not yet an upper layer to handle anything.
799 */
c305e3d3 800 if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) {
1da177e4
LT		 801 unsigned char msg[2];
802
64959e2d 803 smi_inc_stat(smi_info, attentions);
1da177e4 804
c305e3d3
CM		 805 /*
806 * Got a attn, send down a get message flags to see
807 * what's causing it. It would be better to handle
808 * this in the upper layer, but due to the way
809 * interrupts work with the SMI, that's not really
810 * possible.
811 */
1da177e4
LT		 812 msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
813 msg[1] = IPMI_GET_MSG_FLAGS_CMD;
814
815 smi_info->handlers->start_transaction(
816 smi_info->si_sm, msg, 2);
817 smi_info->si_state = SI_GETTING_FLAGS;
818 goto restart;
819 }
820
821 /* If we are currently idle, try to start the next message. */
822 if (si_sm_result == SI_SM_IDLE) {
64959e2d 823 smi_inc_stat(smi_info, idles);
1da177e4
LT		 824
825 si_sm_result = start_next_msg(smi_info);
826 if (si_sm_result != SI_SM_IDLE)
827 goto restart;
c305e3d3 828 }
1da177e4
LT		 829
830 if ((si_sm_result == SI_SM_IDLE)
c305e3d3
CM		 831 && (atomic_read(&smi_info->req_events))) {
832 /*
833 * We are idle and the upper layer requested that I fetch
834 * events, so do so.
835 */
55162fb1 836 atomic_set(&smi_info->req_events, 0);
1da177e4 837
55162fb1
CM		 838 smi_info->curr_msg = ipmi_alloc_smi_msg();
839 if (!smi_info->curr_msg)
840 goto out;
1da177e4 841
55162fb1
CM		 842 smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
843 smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
844 smi_info->curr_msg->data_size = 2;
1da177e4
LT		 845
846 smi_info->handlers->start_transaction(
55162fb1
CM		 847 smi_info->si_sm,
848 smi_info->curr_msg->data,
849 smi_info->curr_msg->data_size);
850 smi_info->si_state = SI_GETTING_EVENTS;
1da177e4
LT		 851 goto restart;
852 }
55162fb1 853 out:
1da177e4
LT		 854 return si_sm_result;
855}
856
857static void sender(void *send_info,
858 struct ipmi_smi_msg *msg,
859 int priority)
860{
861 struct smi_info *smi_info = send_info;
862 enum si_sm_result result;
863 unsigned long flags;
864#ifdef DEBUG_TIMING
865 struct timeval t;
866#endif
867
b361e27b
CM		 868 if (atomic_read(&smi_info->stop_operation)) {
869 msg->rsp[0] = msg->data[0] | 4;
870 msg->rsp[1] = msg->data[1];
871 msg->rsp[2] = IPMI_ERR_UNSPECIFIED;
872 msg->rsp_size = 3;
873 deliver_recv_msg(smi_info, msg);
874 return;
875 }
876
1da177e4
LT		 877#ifdef DEBUG_TIMING
878 do_gettimeofday(&t);
879 printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec);
880#endif
881
882 if (smi_info->run_to_completion) {
bda4c30a
CM		 883 /*
884 * If we are running to completion, then throw it in
885 * the list and run transactions until everything is
886 * clear. Priority doesn't matter here.
887 */
888
889 /*
890 * Run to completion means we are single-threaded, no
891 * need for locks.
892 */
1da177e4
LT		 893 list_add_tail(&(msg->link), &(smi_info->xmit_msgs));
894
1da177e4
LT		 895 result = smi_event_handler(smi_info, 0);
896 while (result != SI_SM_IDLE) {
897 udelay(SI_SHORT_TIMEOUT_USEC);
898 result = smi_event_handler(smi_info,
899 SI_SHORT_TIMEOUT_USEC);
900 }
1da177e4 901 return;
1da177e4 902 }
1da177e4 903
f60adf42 904 spin_lock_irqsave(&smi_info->si_lock, flags);
bda4c30a
CM		 905 if (priority > 0)
906 list_add_tail(&msg->link, &smi_info->hp_xmit_msgs);
907 else
908 list_add_tail(&msg->link, &smi_info->xmit_msgs);
bda4c30a 909
b88e7693 910 if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
f60adf42
CM		 911 /*
912 * last_timeout_jiffies is updated here to avoid
913 * smi_timeout() handler passing very large time_diff
914 * value to smi_event_handler() that causes
915 * the send command to abort.
916 */
917 smi_info->last_timeout_jiffies = jiffies;
918
919 mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
920
921 if (smi_info->thread)
922 wake_up_process(smi_info->thread);
923
1da177e4 924 start_next_msg(smi_info);
b88e7693
S		 925 smi_event_handler(smi_info, 0);
926 }
bda4c30a 927 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1da177e4
LT		 928}
929
930static void set_run_to_completion(void *send_info, int i_run_to_completion)
931{
932 struct smi_info *smi_info = send_info;
933 enum si_sm_result result;
1da177e4
LT		 934
935 smi_info->run_to_completion = i_run_to_completion;
936 if (i_run_to_completion) {
937 result = smi_event_handler(smi_info, 0);
938 while (result != SI_SM_IDLE) {
939 udelay(SI_SHORT_TIMEOUT_USEC);
940 result = smi_event_handler(smi_info,
941 SI_SHORT_TIMEOUT_USEC);
942 }
943 }
1da177e4
LT		 944}
945
ae74e823
MW		 946/*
947 * Use -1 in the nsec value of the busy waiting timespec to tell that
948 * we are spinning in kipmid looking for something and not delaying
949 * between checks
950 */
951static inline void ipmi_si_set_not_busy(struct timespec *ts)
952{
953 ts->tv_nsec = -1;
954}
955static inline int ipmi_si_is_busy(struct timespec *ts)
956{
957 return ts->tv_nsec != -1;
958}
959
960static int ipmi_thread_busy_wait(enum si_sm_result smi_result,
961 const struct smi_info *smi_info,
962 struct timespec *busy_until)
963{
964 unsigned int max_busy_us = 0;
965
966 if (smi_info->intf_num < num_max_busy_us)
967 max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
968 if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
969 ipmi_si_set_not_busy(busy_until);
970 else if (!ipmi_si_is_busy(busy_until)) {
971 getnstimeofday(busy_until);
972 timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
973 } else {
974 struct timespec now;
975 getnstimeofday(&now);
976 if (unlikely(timespec_compare(&now, busy_until) > 0)) {
977 ipmi_si_set_not_busy(busy_until);
978 return 0;
979 }
980 }
981 return 1;
982}
983
984
985/*
986 * A busy-waiting loop for speeding up IPMI operation.
987 *
988 * Lousy hardware makes this hard. This is only enabled for systems
989 * that are not BT and do not have interrupts. It starts spinning
990 * when an operation is complete or until max_busy tells it to stop
991 * (if that is enabled). See the paragraph on kimid_max_busy_us in
992 * Documentation/IPMI.txt for details.
993 */
a9a2c44f
CM		 994static int ipmi_thread(void *data)
995{
996 struct smi_info *smi_info = data;
e9a705a0 997 unsigned long flags;
a9a2c44f 998 enum si_sm_result smi_result;
ae74e823 999 struct timespec busy_until;
a9a2c44f 1000
ae74e823 1001 ipmi_si_set_not_busy(&busy_until);
a9a2c44f 1002 set_user_nice(current, 19);
e9a705a0 1003 while (!kthread_should_stop()) {
ae74e823
MW		 1004 int busy_wait;
1005
a9a2c44f 1006 spin_lock_irqsave(&(smi_info->si_lock), flags);
8a3628d5 1007 smi_result = smi_event_handler(smi_info, 0);
a9a2c44f 1008 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
ae74e823
MW		 1009 busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
1010 &busy_until);
c305e3d3
CM		 1011 if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
1012 ; /* do nothing */
ae74e823 1013 else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
33979734 1014 schedule();
3326f4f2
MG		 1015 else if (smi_result == SI_SM_IDLE)
1016 schedule_timeout_interruptible(100);
e9a705a0 1017 else
8d1f66dc 1018 schedule_timeout_interruptible(1);
a9a2c44f 1019 }
a9a2c44f
CM		 1020 return 0;
1021}
1022
1023
1da177e4
LT		 1024static void poll(void *send_info)
1025{
1026 struct smi_info *smi_info = send_info;
f60adf42
CM		 1027 unsigned long flags = 0;
1028 int run_to_completion = smi_info->run_to_completion;
1da177e4 1029
15c62e10
CM		 1030 /*
1031 * Make sure there is some delay in the poll loop so we can
1032 * drive time forward and timeout things.
1033 */
1034 udelay(10);
f60adf42
CM		 1035 if (!run_to_completion)
1036 spin_lock_irqsave(&smi_info->si_lock, flags);
15c62e10 1037 smi_event_handler(smi_info, 10);
f60adf42
CM		 1038 if (!run_to_completion)
1039 spin_unlock_irqrestore(&smi_info->si_lock, flags);
1da177e4
LT		 1040}
1041
1042static void request_events(void *send_info)
1043{
1044 struct smi_info *smi_info = send_info;
1045
40112ae7
CM		 1046 if (atomic_read(&smi_info->stop_operation) ||
1047 !smi_info->has_event_buffer)
b361e27b
CM		 1048 return;
1049
1da177e4
LT		 1050 atomic_set(&smi_info->req_events, 1);
1051}
1052
0c8204b3 1053static int initialized;
1da177e4 1054
1da177e4
LT		 1055static void smi_timeout(unsigned long data)
1056{
1057 struct smi_info *smi_info = (struct smi_info *) data;
1058 enum si_sm_result smi_result;
1059 unsigned long flags;
1060 unsigned long jiffies_now;
c4edff1c 1061 long time_diff;
3326f4f2 1062 long timeout;
1da177e4
LT		 1063#ifdef DEBUG_TIMING
1064 struct timeval t;
1065#endif
1066
1da177e4
LT		 1067 spin_lock_irqsave(&(smi_info->si_lock), flags);
1068#ifdef DEBUG_TIMING
1069 do_gettimeofday(&t);
c305e3d3 1070 printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 1071#endif
1072 jiffies_now = jiffies;
c4edff1c 1073 time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
1da177e4
LT		 1074 * SI_USEC_PER_JIFFY);
1075 smi_result = smi_event_handler(smi_info, time_diff);
1076
1077 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1078
1079 smi_info->last_timeout_jiffies = jiffies_now;
1080
b0defcdb 1081 if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
1da177e4 1082 /* Running with interrupts, only do long timeouts. */
3326f4f2 1083 timeout = jiffies + SI_TIMEOUT_JIFFIES;
64959e2d 1084 smi_inc_stat(smi_info, long_timeouts);
3326f4f2 1085 goto do_mod_timer;
1da177e4
LT		 1086 }
1087
c305e3d3
CM		 1088 /*
1089 * If the state machine asks for a short delay, then shorten
1090 * the timer timeout.
1091 */
1da177e4 1092 if (smi_result == SI_SM_CALL_WITH_DELAY) {
64959e2d 1093 smi_inc_stat(smi_info, short_timeouts);
3326f4f2 1094 timeout = jiffies + 1;
1da177e4 1095 } else {
64959e2d 1096 smi_inc_stat(smi_info, long_timeouts);
3326f4f2 1097 timeout = jiffies + SI_TIMEOUT_JIFFIES;
1da177e4
LT		 1098 }
1099
3326f4f2
MG		 1100 do_mod_timer:
1101 if (smi_result != SI_SM_IDLE)
1102 mod_timer(&(smi_info->si_timer), timeout);
1da177e4
LT		 1103}
1104
7d12e780 1105static irqreturn_t si_irq_handler(int irq, void *data)
1da177e4
LT		 1106{
1107 struct smi_info *smi_info = data;
1108 unsigned long flags;
1109#ifdef DEBUG_TIMING
1110 struct timeval t;
1111#endif
1112
1113 spin_lock_irqsave(&(smi_info->si_lock), flags);
1114
64959e2d 1115 smi_inc_stat(smi_info, interrupts);
1da177e4 1116
1da177e4
LT		 1117#ifdef DEBUG_TIMING
1118 do_gettimeofday(&t);
c305e3d3 1119 printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1da177e4
LT		 1120#endif
1121 smi_event_handler(smi_info, 0);
1da177e4
LT		 1122 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1123 return IRQ_HANDLED;
1124}
1125
7d12e780 1126static irqreturn_t si_bt_irq_handler(int irq, void *data)
9dbf68f9
CM		 1127{
1128 struct smi_info *smi_info = data;
1129 /* We need to clear the IRQ flag for the BT interface. */
1130 smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
1131 IPMI_BT_INTMASK_CLEAR_IRQ_BIT
1132 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
7d12e780 1133 return si_irq_handler(irq, data);
9dbf68f9
CM		 1134}
1135
453823ba
CM		 1136static int smi_start_processing(void *send_info,
1137 ipmi_smi_t intf)
1138{
1139 struct smi_info *new_smi = send_info;
a51f4a81 1140 int enable = 0;
453823ba
CM		 1141
1142 new_smi->intf = intf;
1143
c45adc39
CM		 1144 /* Try to claim any interrupts. */
1145 if (new_smi->irq_setup)
1146 new_smi->irq_setup(new_smi);
1147
453823ba
CM		 1148 /* Set up the timer that drives the interface. */
1149 setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
1150 new_smi->last_timeout_jiffies = jiffies;
1151 mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
1152
a51f4a81
CM		 1153 /*
1154 * Check if the user forcefully enabled the daemon.
1155 */
1156 if (new_smi->intf_num < num_force_kipmid)
1157 enable = force_kipmid[new_smi->intf_num];
df3fe8de
CM		 1158 /*
1159 * The BT interface is efficient enough to not need a thread,
1160 * and there is no need for a thread if we have interrupts.
1161 */
c305e3d3 1162 else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
a51f4a81
CM		 1163 enable = 1;
1164
1165 if (enable) {
453823ba
CM		 1166 new_smi->thread = kthread_run(ipmi_thread, new_smi,
1167 "kipmi%d", new_smi->intf_num);
1168 if (IS_ERR(new_smi->thread)) {
279fbd0c
MS		 1169 dev_notice(new_smi->dev, "Could not start"
1170 " kernel thread due to error %ld, only using"
1171 " timers to drive the interface\n",
1172 PTR_ERR(new_smi->thread));
453823ba
CM		 1173 new_smi->thread = NULL;
1174 }
1175 }
1176
1177 return 0;
1178}
9dbf68f9 1179
16f4232c
ZY		 1180static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
1181{
1182 struct smi_info *smi = send_info;
1183
1184 data->addr_src = smi->addr_source;
1185 data->dev = smi->dev;
1186 data->addr_info = smi->addr_info;
1187 get_device(smi->dev);
1188
1189 return 0;
1190}
1191
b9675136
CM		 1192static void set_maintenance_mode(void *send_info, int enable)
1193{
1194 struct smi_info *smi_info = send_info;
1195
1196 if (!enable)
1197 atomic_set(&smi_info->req_events, 0);
1198}
1199
c305e3d3 1200static struct ipmi_smi_handlers handlers = {
1da177e4 1201 .owner = THIS_MODULE,
453823ba 1202 .start_processing = smi_start_processing,
16f4232c 1203 .get_smi_info = get_smi_info,
1da177e4
LT		 1204 .sender = sender,
1205 .request_events = request_events,
b9675136 1206 .set_maintenance_mode = set_maintenance_mode,
1da177e4
LT		 1207 .set_run_to_completion = set_run_to_completion,
1208 .poll = poll,
1209};
1210
c305e3d3
CM		 1211/*
1212 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
1213 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
1214 */
1da177e4 1215
b0defcdb 1216static LIST_HEAD(smi_infos);
d6dfd131 1217static DEFINE_MUTEX(smi_infos_lock);
b0defcdb 1218static int smi_num; /* Used to sequence the SMIs */
1da177e4 1219
1da177e4 1220#define DEFAULT_REGSPACING 1
dba9b4f6 1221#define DEFAULT_REGSIZE 1
1da177e4 1222
d941aeae
CM		 1223#ifdef CONFIG_ACPI
1224static bool si_tryacpi = 1;
1225#endif
1226#ifdef CONFIG_DMI
1227static bool si_trydmi = 1;
1228#endif
f2afae46
CM		 1229static bool si_tryplatform = 1;
1230#ifdef CONFIG_PCI
1231static bool si_trypci = 1;
1232#endif
90ab5ee9 1233static bool si_trydefaults = 1;
1da177e4
LT		 1234static char *si_type[SI_MAX_PARMS];
1235#define MAX_SI_TYPE_STR 30
1236static char si_type_str[MAX_SI_TYPE_STR];
1237static unsigned long addrs[SI_MAX_PARMS];
64a6f950 1238static unsigned int num_addrs;
1da177e4 1239static unsigned int ports[SI_MAX_PARMS];
64a6f950 1240static unsigned int num_ports;
1da177e4 1241static int irqs[SI_MAX_PARMS];
64a6f950 1242static unsigned int num_irqs;
1da177e4 1243static int regspacings[SI_MAX_PARMS];
64a6f950 1244static unsigned int num_regspacings;
1da177e4 1245static int regsizes[SI_MAX_PARMS];
64a6f950 1246static unsigned int num_regsizes;
1da177e4 1247static int regshifts[SI_MAX_PARMS];
64a6f950 1248static unsigned int num_regshifts;
2f95d513 1249static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
64a6f950 1250static unsigned int num_slave_addrs;
1da177e4 1251
b361e27b
CM		 1252#define IPMI_IO_ADDR_SPACE 0
1253#define IPMI_MEM_ADDR_SPACE 1
1d5636cc 1254static char *addr_space_to_str[] = { "i/o", "mem" };
b361e27b
CM		 1255
1256static int hotmod_handler(const char *val, struct kernel_param *kp);
1257
1258module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
1259MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
1260 " Documentation/IPMI.txt in the kernel sources for the"
1261 " gory details.");
1da177e4 1262
d941aeae
CM		 1263#ifdef CONFIG_ACPI
1264module_param_named(tryacpi, si_tryacpi, bool, 0);
1265MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1266 " default scan of the interfaces identified via ACPI");
1267#endif
1268#ifdef CONFIG_DMI
1269module_param_named(trydmi, si_trydmi, bool, 0);
1270MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
1271 " default scan of the interfaces identified via DMI");
1272#endif
f2afae46
CM		 1273module_param_named(tryplatform, si_tryplatform, bool, 0);
1274MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1275 " default scan of the interfaces identified via platform"
1276 " interfaces like openfirmware");
1277#ifdef CONFIG_PCI
1278module_param_named(trypci, si_trypci, bool, 0);
1279MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
1280 " default scan of the interfaces identified via pci");
1281#endif
1da177e4
LT		 1282module_param_named(trydefaults, si_trydefaults, bool, 0);
1283MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
1284 " default scan of the KCS and SMIC interface at the standard"
1285 " address");
1286module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
1287MODULE_PARM_DESC(type, "Defines the type of each interface, each"
1288 " interface separated by commas. The types are 'kcs',"
1289 " 'smic', and 'bt'. For example si_type=kcs,bt will set"
1290 " the first interface to kcs and the second to bt");
64a6f950 1291module_param_array(addrs, ulong, &num_addrs, 0);
1da177e4
LT		 1292MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
1293 " addresses separated by commas. Only use if an interface"
1294 " is in memory. Otherwise, set it to zero or leave"
1295 " it blank.");
64a6f950 1296module_param_array(ports, uint, &num_ports, 0);
1da177e4
LT		 1297MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
1298 " addresses separated by commas. Only use if an interface"
1299 " is a port. Otherwise, set it to zero or leave"
1300 " it blank.");
1301module_param_array(irqs, int, &num_irqs, 0);
1302MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
1303 " addresses separated by commas. Only use if an interface"
1304 " has an interrupt. Otherwise, set it to zero or leave"
1305 " it blank.");
1306module_param_array(regspacings, int, &num_regspacings, 0);
1307MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
1308 " and each successive register used by the interface. For"
1309 " instance, if the start address is 0xca2 and the spacing"
1310 " is 2, then the second address is at 0xca4. Defaults"
1311 " to 1.");
1312module_param_array(regsizes, int, &num_regsizes, 0);
1313MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
1314 " This should generally be 1, 2, 4, or 8 for an 8-bit,"
1315 " 16-bit, 32-bit, or 64-bit register. Use this if you"
1316 " the 8-bit IPMI register has to be read from a larger"
1317 " register.");
1318module_param_array(regshifts, int, &num_regshifts, 0);
1319MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
1320 " IPMI register, in bits. For instance, if the data"
1321 " is read from a 32-bit word and the IPMI data is in"
1322 " bit 8-15, then the shift would be 8");
1323module_param_array(slave_addrs, int, &num_slave_addrs, 0);
1324MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
1325 " the controller. Normally this is 0x20, but can be"
1326 " overridden by this parm. This is an array indexed"
1327 " by interface number.");
a51f4a81
CM		 1328module_param_array(force_kipmid, int, &num_force_kipmid, 0);
1329MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
1330 " disabled(0). Normally the IPMI driver auto-detects"
1331 " this, but the value may be overridden by this parm.");
b361e27b
CM		 1332module_param(unload_when_empty, int, 0);
1333MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
1334 " specified or found, default is 1. Setting to 0"
1335 " is useful for hot add of devices using hotmod.");
ae74e823
MW		 1336module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
1337MODULE_PARM_DESC(kipmid_max_busy_us,
1338 "Max time (in microseconds) to busy-wait for IPMI data before"
1339 " sleeping. 0 (default) means to wait forever. Set to 100-500"
1340 " if kipmid is using up a lot of CPU time.");
1da177e4
LT		 1341
1342
b0defcdb 1343static void std_irq_cleanup(struct smi_info *info)
1da177e4 1344{
b0defcdb
CM		 1345 if (info->si_type == SI_BT)
1346 /* Disable the interrupt in the BT interface. */
1347 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
1348 free_irq(info->irq, info);
1da177e4 1349}
1da177e4
LT		 1350
1351static int std_irq_setup(struct smi_info *info)
1352{
1353 int rv;
1354
b0defcdb 1355 if (!info->irq)
1da177e4
LT		 1356 return 0;
1357
9dbf68f9
CM		 1358 if (info->si_type == SI_BT) {
1359 rv = request_irq(info->irq,
1360 si_bt_irq_handler,
aa5b2bab 1361 IRQF_SHARED,
9dbf68f9
CM		 1362 DEVICE_NAME,
1363 info);
b0defcdb 1364 if (!rv)
9dbf68f9
CM		 1365 /* Enable the interrupt in the BT interface. */
1366 info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
1367 IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
1368 } else
1369 rv = request_irq(info->irq,
1370 si_irq_handler,
aa5b2bab 1371 IRQF_SHARED,
9dbf68f9
CM		 1372 DEVICE_NAME,
1373 info);
1da177e4 1374 if (rv) {
279fbd0c
MS		 1375 dev_warn(info->dev, "%s unable to claim interrupt %d,"
1376 " running polled\n",
1377 DEVICE_NAME, info->irq);
1da177e4
LT		 1378 info->irq = 0;
1379 } else {
b0defcdb 1380 info->irq_cleanup = std_irq_cleanup;
279fbd0c 1381 dev_info(info->dev, "Using irq %d\n", info->irq);
1da177e4
LT		 1382 }
1383
1384 return rv;
1385}
1386
1da177e4
LT		 1387static unsigned char port_inb(struct si_sm_io *io, unsigned int offset)
1388{
b0defcdb 1389 unsigned int addr = io->addr_data;
1da177e4 1390
b0defcdb 1391 return inb(addr + (offset * io->regspacing));
1da177e4
LT		 1392}
1393
1394static void port_outb(struct si_sm_io *io, unsigned int offset,
1395 unsigned char b)
1396{
b0defcdb 1397 unsigned int addr = io->addr_data;
1da177e4 1398
b0defcdb 1399 outb(b, addr + (offset * io->regspacing));
1da177e4
LT		 1400}
1401
1402static unsigned char port_inw(struct si_sm_io *io, unsigned int offset)
1403{
b0defcdb 1404 unsigned int addr = io->addr_data;
1da177e4 1405
b0defcdb 1406 return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1da177e4
LT		 1407}
1408
1409static void port_outw(struct si_sm_io *io, unsigned int offset,
1410 unsigned char b)
1411{
b0defcdb 1412 unsigned int addr = io->addr_data;
1da177e4 1413
b0defcdb 1414 outw(b << io->regshift, addr + (offset * io->regspacing));
1da177e4
LT		 1415}
1416
1417static unsigned char port_inl(struct si_sm_io *io, unsigned int offset)
1418{
b0defcdb 1419 unsigned int addr = io->addr_data;
1da177e4 1420
b0defcdb 1421 return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
1da177e4
LT		 1422}
1423
1424static void port_outl(struct si_sm_io *io, unsigned int offset,
1425 unsigned char b)
1426{
b0defcdb 1427 unsigned int addr = io->addr_data;
1da177e4 1428
b0defcdb 1429 outl(b << io->regshift, addr+(offset * io->regspacing));
1da177e4
LT		 1430}
1431
1432static void port_cleanup(struct smi_info *info)
1433{
b0defcdb 1434 unsigned int addr = info->io.addr_data;
d61a3ead 1435 int idx;
1da177e4 1436
b0defcdb 1437 if (addr) {
c305e3d3 1438 for (idx = 0; idx < info->io_size; idx++)
d61a3ead
CM		 1439 release_region(addr + idx * info->io.regspacing,
1440 info->io.regsize);
1da177e4 1441 }
1da177e4
LT		 1442}
1443
1444static int port_setup(struct smi_info *info)
1445{
b0defcdb 1446 unsigned int addr = info->io.addr_data;
d61a3ead 1447 int idx;
1da177e4 1448
b0defcdb 1449 if (!addr)
1da177e4
LT		 1450 return -ENODEV;
1451
1452 info->io_cleanup = port_cleanup;
1453
c305e3d3
CM		 1454 /*
1455 * Figure out the actual inb/inw/inl/etc routine to use based
1456 * upon the register size.
1457 */
1da177e4
LT		 1458 switch (info->io.regsize) {
1459 case 1:
1460 info->io.inputb = port_inb;
1461 info->io.outputb = port_outb;
1462 break;
1463 case 2:
1464 info->io.inputb = port_inw;
1465 info->io.outputb = port_outw;
1466 break;
1467 case 4:
1468 info->io.inputb = port_inl;
1469 info->io.outputb = port_outl;
1470 break;
1471 default:
279fbd0c
MS		 1472 dev_warn(info->dev, "Invalid register size: %d\n",
1473 info->io.regsize);
1da177e4
LT		 1474 return -EINVAL;
1475 }
1476
c305e3d3
CM		 1477 /*
1478 * Some BIOSes reserve disjoint I/O regions in their ACPI
d61a3ead
CM		 1479 * tables. This causes problems when trying to register the
1480 * entire I/O region. Therefore we must register each I/O
1481 * port separately.
1482 */
c305e3d3 1483 for (idx = 0; idx < info->io_size; idx++) {
d61a3ead
CM		 1484 if (request_region(addr + idx * info->io.regspacing,
1485 info->io.regsize, DEVICE_NAME) == NULL) {
1486 /* Undo allocations */
1487 while (idx--) {
1488 release_region(addr + idx * info->io.regspacing,
1489 info->io.regsize);
1490 }
1491 return -EIO;
1492 }
1493 }
1da177e4
LT		 1494 return 0;
1495}
1496
546cfdf4 1497static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1498{
1499 return readb((io->addr)+(offset * io->regspacing));
1500}
1501
546cfdf4 1502static void intf_mem_outb(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1503 unsigned char b)
1504{
1505 writeb(b, (io->addr)+(offset * io->regspacing));
1506}
1507
546cfdf4 1508static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1509{
1510 return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1511 & 0xff;
1da177e4
LT		 1512}
1513
546cfdf4 1514static void intf_mem_outw(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1515 unsigned char b)
1516{
1517 writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
1518}
1519
546cfdf4 1520static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset)
1da177e4
LT		 1521{
1522 return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1523 & 0xff;
1da177e4
LT		 1524}
1525
546cfdf4 1526static void intf_mem_outl(struct si_sm_io *io, unsigned int offset,
1da177e4
LT		 1527 unsigned char b)
1528{
1529 writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
1530}
1531
1532#ifdef readq
1533static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset)
1534{
1535 return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
64d9fe69 1536 & 0xff;
1da177e4
LT		 1537}
1538
1539static void mem_outq(struct si_sm_io *io, unsigned int offset,
1540 unsigned char b)
1541{
1542 writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
1543}
1544#endif
1545
1546static void mem_cleanup(struct smi_info *info)
1547{
b0defcdb 1548 unsigned long addr = info->io.addr_data;
1da177e4
LT		 1549 int mapsize;
1550
1551 if (info->io.addr) {
1552 iounmap(info->io.addr);
1553
1554 mapsize = ((info->io_size * info->io.regspacing)
1555 - (info->io.regspacing - info->io.regsize));
1556
b0defcdb 1557 release_mem_region(addr, mapsize);
1da177e4 1558 }
1da177e4
LT		 1559}
1560
1561static int mem_setup(struct smi_info *info)
1562{
b0defcdb 1563 unsigned long addr = info->io.addr_data;
1da177e4
LT		 1564 int mapsize;
1565
b0defcdb 1566 if (!addr)
1da177e4
LT		 1567 return -ENODEV;
1568
1569 info->io_cleanup = mem_cleanup;
1570
c305e3d3
CM		 1571 /*
1572 * Figure out the actual readb/readw/readl/etc routine to use based
1573 * upon the register size.
1574 */
1da177e4
LT		 1575 switch (info->io.regsize) {
1576 case 1:
546cfdf4
AD		 1577 info->io.inputb = intf_mem_inb;
1578 info->io.outputb = intf_mem_outb;
1da177e4
LT		 1579 break;
1580 case 2:
546cfdf4
AD		 1581 info->io.inputb = intf_mem_inw;
1582 info->io.outputb = intf_mem_outw;
1da177e4
LT		 1583 break;
1584 case 4:
546cfdf4
AD		 1585 info->io.inputb = intf_mem_inl;
1586 info->io.outputb = intf_mem_outl;
1da177e4
LT		 1587 break;
1588#ifdef readq
1589 case 8:
1590 info->io.inputb = mem_inq;
1591 info->io.outputb = mem_outq;
1592 break;
1593#endif
1594 default:
279fbd0c
MS		 1595 dev_warn(info->dev, "Invalid register size: %d\n",
1596 info->io.regsize);
1da177e4
LT		 1597 return -EINVAL;
1598 }
1599
c305e3d3
CM		 1600 /*
1601 * Calculate the total amount of memory to claim. This is an
1da177e4
LT		 1602 * unusual looking calculation, but it avoids claiming any
1603 * more memory than it has to. It will claim everything
1604 * between the first address to the end of the last full
c305e3d3
CM		 1605 * register.
1606 */
1da177e4
LT		 1607 mapsize = ((info->io_size * info->io.regspacing)
1608 - (info->io.regspacing - info->io.regsize));
1609
b0defcdb 1610 if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
1da177e4
LT		 1611 return -EIO;
1612
b0defcdb 1613 info->io.addr = ioremap(addr, mapsize);
1da177e4 1614 if (info->io.addr == NULL) {
b0defcdb 1615 release_mem_region(addr, mapsize);
1da177e4
LT		 1616 return -EIO;
1617 }
1618 return 0;
1619}
1620
b361e27b
CM		 1621/*
1622 * Parms come in as <op1>[:op2[:op3...]]. ops are:
1623 * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
1624 * Options are:
1625 * rsp=<regspacing>
1626 * rsi=<regsize>
1627 * rsh=<regshift>
1628 * irq=<irq>
1629 * ipmb=<ipmb addr>
1630 */
1631enum hotmod_op { HM_ADD, HM_REMOVE };
1632struct hotmod_vals {
1633 char *name;
1634 int val;
1635};
1636static struct hotmod_vals hotmod_ops[] = {
1637 { "add", HM_ADD },
1638 { "remove", HM_REMOVE },
1639 { NULL }
1640};
1641static struct hotmod_vals hotmod_si[] = {
1642 { "kcs", SI_KCS },
1643 { "smic", SI_SMIC },
1644 { "bt", SI_BT },
1645 { NULL }
1646};
1647static struct hotmod_vals hotmod_as[] = {
1648 { "mem", IPMI_MEM_ADDR_SPACE },
1649 { "i/o", IPMI_IO_ADDR_SPACE },
1650 { NULL }
1651};
1d5636cc 1652
b361e27b
CM		 1653static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr)
1654{
1655 char *s;
1656 int i;
1657
1658 s = strchr(*curr, ',');
1659 if (!s) {
1660 printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
1661 return -EINVAL;
1662 }
1663 *s = '\0';
1664 s++;
1665 for (i = 0; hotmod_ops[i].name; i++) {
1d5636cc 1666 if (strcmp(*curr, v[i].name) == 0) {
b361e27b
CM		 1667 *val = v[i].val;
1668 *curr = s;
1669 return 0;
1670 }
1671 }
1672
1673 printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
1674 return -EINVAL;
1675}
1676
1d5636cc
CM		 1677static int check_hotmod_int_op(const char *curr, const char *option,
1678 const char *name, int *val)
1679{
1680 char *n;
1681
1682 if (strcmp(curr, name) == 0) {
1683 if (!option) {
1684 printk(KERN_WARNING PFX
1685 "No option given for '%s'\n",
1686 curr);
1687 return -EINVAL;
1688 }
1689 *val = simple_strtoul(option, &n, 0);
1690 if ((*n != '\0') || (*option == '\0')) {
1691 printk(KERN_WARNING PFX
1692 "Bad option given for '%s'\n",
1693 curr);
1694 return -EINVAL;
1695 }
1696 return 1;
1697 }
1698 return 0;
1699}
1700
de5e2ddf
ED		 1701static struct smi_info *smi_info_alloc(void)
1702{
1703 struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
1704
f60adf42 1705 if (info)
de5e2ddf 1706 spin_lock_init(&info->si_lock);
de5e2ddf
ED		 1707 return info;
1708}
1709
b361e27b
CM		 1710static int hotmod_handler(const char *val, struct kernel_param *kp)
1711{
1712 char *str = kstrdup(val, GFP_KERNEL);
1d5636cc 1713 int rv;
b361e27b
CM		 1714 char *next, *curr, *s, *n, *o;
1715 enum hotmod_op op;
1716 enum si_type si_type;
1717 int addr_space;
1718 unsigned long addr;
1719 int regspacing;
1720 int regsize;
1721 int regshift;
1722 int irq;
1723 int ipmb;
1724 int ival;
1d5636cc 1725 int len;
b361e27b
CM		 1726 struct smi_info *info;
1727
1728 if (!str)
1729 return -ENOMEM;
1730
1731 /* Kill any trailing spaces, as we can get a "\n" from echo. */
1d5636cc
CM		 1732 len = strlen(str);
1733 ival = len - 1;
b361e27b
CM		 1734 while ((ival >= 0) && isspace(str[ival])) {
1735 str[ival] = '\0';
1736 ival--;
1737 }
1738
1739 for (curr = str; curr; curr = next) {
1740 regspacing = 1;
1741 regsize = 1;
1742 regshift = 0;
1743 irq = 0;
2f95d513 1744 ipmb = 0; /* Choose the default if not specified */
b361e27b
CM		 1745
1746 next = strchr(curr, ':');
1747 if (next) {
1748 *next = '\0';
1749 next++;
1750 }
1751
1752 rv = parse_str(hotmod_ops, &ival, "operation", &curr);
1753 if (rv)
1754 break;
1755 op = ival;
1756
1757 rv = parse_str(hotmod_si, &ival, "interface type", &curr);
1758 if (rv)
1759 break;
1760 si_type = ival;
1761
1762 rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
1763 if (rv)
1764 break;
1765
1766 s = strchr(curr, ',');
1767 if (s) {
1768 *s = '\0';
1769 s++;
1770 }
1771 addr = simple_strtoul(curr, &n, 0);
1772 if ((*n != '\0') || (*curr == '\0')) {
1773 printk(KERN_WARNING PFX "Invalid hotmod address"
1774 " '%s'\n", curr);
1775 break;
1776 }
1777
1778 while (s) {
1779 curr = s;
1780 s = strchr(curr, ',');
1781 if (s) {
1782 *s = '\0';
1783 s++;
1784 }
1785 o = strchr(curr, '=');
1786 if (o) {
1787 *o = '\0';
1788 o++;
1789 }
1d5636cc
CM		 1790 rv = check_hotmod_int_op(curr, o, "rsp", &regspacing);
1791 if (rv < 0)
b361e27b 1792 goto out;
1d5636cc
CM		 1793 else if (rv)
1794 continue;
1795 rv = check_hotmod_int_op(curr, o, "rsi", &regsize);
1796 if (rv < 0)
1797 goto out;
1798 else if (rv)
1799 continue;
1800 rv = check_hotmod_int_op(curr, o, "rsh", &regshift);
1801 if (rv < 0)
1802 goto out;
1803 else if (rv)
1804 continue;
1805 rv = check_hotmod_int_op(curr, o, "irq", &irq);
1806 if (rv < 0)
1807 goto out;
1808 else if (rv)
1809 continue;
1810 rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
1811 if (rv < 0)
1812 goto out;
1813 else if (rv)
1814 continue;
1815
1816 rv = -EINVAL;
1817 printk(KERN_WARNING PFX
1818 "Invalid hotmod option '%s'\n",
1819 curr);
1820 goto out;
b361e27b
CM		 1821 }
1822
1823 if (op == HM_ADD) {
de5e2ddf 1824 info = smi_info_alloc();
b361e27b
CM		 1825 if (!info) {
1826 rv = -ENOMEM;
1827 goto out;
1828 }
1829
5fedc4a2 1830 info->addr_source = SI_HOTMOD;
b361e27b
CM		 1831 info->si_type = si_type;
1832 info->io.addr_data = addr;
1833 info->io.addr_type = addr_space;
1834 if (addr_space == IPMI_MEM_ADDR_SPACE)
1835 info->io_setup = mem_setup;
1836 else
1837 info->io_setup = port_setup;
1838
1839 info->io.addr = NULL;
1840 info->io.regspacing = regspacing;
1841 if (!info->io.regspacing)
1842 info->io.regspacing = DEFAULT_REGSPACING;
1843 info->io.regsize = regsize;
1844 if (!info->io.regsize)
1845 info->io.regsize = DEFAULT_REGSPACING;
1846 info->io.regshift = regshift;
1847 info->irq = irq;
1848 if (info->irq)
1849 info->irq_setup = std_irq_setup;
1850 info->slave_addr = ipmb;
1851
7faefea6 1852 if (!add_smi(info)) {
2407d77a
MG		 1853 if (try_smi_init(info))
1854 cleanup_one_si(info);
7faefea6
YL		 1855 } else {
1856 kfree(info);
1857 }
b361e27b
CM		 1858 } else {
1859 /* remove */
1860 struct smi_info *e, *tmp_e;
1861
1862 mutex_lock(&smi_infos_lock);
1863 list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
1864 if (e->io.addr_type != addr_space)
1865 continue;
1866 if (e->si_type != si_type)
1867 continue;
1868 if (e->io.addr_data == addr)
1869 cleanup_one_si(e);
1870 }
1871 mutex_unlock(&smi_infos_lock);
1872 }
1873 }
1d5636cc 1874 rv = len;
b361e27b
CM		 1875 out:
1876 kfree(str);
1877 return rv;
1878}
b0defcdb 1879
2223cbec 1880static int hardcode_find_bmc(void)
1da177e4 1881{
a1e9c9dd 1882 int ret = -ENODEV;
b0defcdb 1883 int i;
1da177e4
LT		 1884 struct smi_info *info;
1885
b0defcdb
CM		 1886 for (i = 0; i < SI_MAX_PARMS; i++) {
1887 if (!ports[i] && !addrs[i])
1888 continue;
1da177e4 1889
de5e2ddf 1890 info = smi_info_alloc();
b0defcdb 1891 if (!info)
a1e9c9dd 1892 return -ENOMEM;
1da177e4 1893
5fedc4a2 1894 info->addr_source = SI_HARDCODED;
279fbd0c 1895 printk(KERN_INFO PFX "probing via hardcoded address\n");
1da177e4 1896
1d5636cc 1897 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
b0defcdb 1898 info->si_type = SI_KCS;
1d5636cc 1899 } else if (strcmp(si_type[i], "smic") == 0) {
b0defcdb 1900 info->si_type = SI_SMIC;
1d5636cc 1901 } else if (strcmp(si_type[i], "bt") == 0) {
b0defcdb
CM		 1902 info->si_type = SI_BT;
1903 } else {
279fbd0c 1904 printk(KERN_WARNING PFX "Interface type specified "
b0defcdb
CM		 1905 "for interface %d, was invalid: %s\n",
1906 i, si_type[i]);
1907 kfree(info);
1908 continue;
1909 }
1da177e4 1910
b0defcdb
CM		 1911 if (ports[i]) {
1912 /* An I/O port */
1913 info->io_setup = port_setup;
1914 info->io.addr_data = ports[i];
1915 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1916 } else if (addrs[i]) {
1917 /* A memory port */
1918 info->io_setup = mem_setup;
1919 info->io.addr_data = addrs[i];
1920 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1921 } else {
279fbd0c
MS		 1922 printk(KERN_WARNING PFX "Interface type specified "
1923 "for interface %d, but port and address were "
1924 "not set or set to zero.\n", i);
b0defcdb
CM		 1925 kfree(info);
1926 continue;
1927 }
1da177e4 1928
b0defcdb
CM		 1929 info->io.addr = NULL;
1930 info->io.regspacing = regspacings[i];
1931 if (!info->io.regspacing)
1932 info->io.regspacing = DEFAULT_REGSPACING;
1933 info->io.regsize = regsizes[i];
1934 if (!info->io.regsize)
1935 info->io.regsize = DEFAULT_REGSPACING;
1936 info->io.regshift = regshifts[i];
1937 info->irq = irqs[i];
1938 if (info->irq)
1939 info->irq_setup = std_irq_setup;
2f95d513 1940 info->slave_addr = slave_addrs[i];
1da177e4 1941
7faefea6 1942 if (!add_smi(info)) {
2407d77a
MG		 1943 if (try_smi_init(info))
1944 cleanup_one_si(info);
a1e9c9dd 1945 ret = 0;
7faefea6
YL		 1946 } else {
1947 kfree(info);
1948 }
b0defcdb 1949 }
a1e9c9dd 1950 return ret;
b0defcdb 1951}
1da177e4 1952
8466361a 1953#ifdef CONFIG_ACPI
1da177e4
LT		 1954
1955#include <linux/acpi.h>
1956
c305e3d3
CM		 1957/*
1958 * Once we get an ACPI failure, we don't try any more, because we go
1959 * through the tables sequentially. Once we don't find a table, there
1960 * are no more.
1961 */
0c8204b3 1962static int acpi_failure;
1da177e4
LT		 1963
1964/* For GPE-type interrupts. */
8b6cd8ad
LM		 1965static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
1966 u32 gpe_number, void *context)
1da177e4
LT		 1967{
1968 struct smi_info *smi_info = context;
1969 unsigned long flags;
1970#ifdef DEBUG_TIMING
1971 struct timeval t;
1972#endif
1973
1974 spin_lock_irqsave(&(smi_info->si_lock), flags);
1975
64959e2d 1976 smi_inc_stat(smi_info, interrupts);
1da177e4 1977
1da177e4
LT		 1978#ifdef DEBUG_TIMING
1979 do_gettimeofday(&t);
1980 printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec);
1981#endif
1982 smi_event_handler(smi_info, 0);
1da177e4
LT		 1983 spin_unlock_irqrestore(&(smi_info->si_lock), flags);
1984
1985 return ACPI_INTERRUPT_HANDLED;
1986}
1987
b0defcdb
CM		 1988static void acpi_gpe_irq_cleanup(struct smi_info *info)
1989{
1990 if (!info->irq)
1991 return;
1992
1993 acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
1994}
1995
1da177e4
LT		 1996static int acpi_gpe_irq_setup(struct smi_info *info)
1997{
1998 acpi_status status;
1999
b0defcdb 2000 if (!info->irq)
1da177e4
LT		 2001 return 0;
2002
2003 /* FIXME - is level triggered right? */
2004 status = acpi_install_gpe_handler(NULL,
2005 info->irq,
2006 ACPI_GPE_LEVEL_TRIGGERED,
2007 &ipmi_acpi_gpe,
2008 info);
2009 if (status != AE_OK) {
279fbd0c
MS		 2010 dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
2011 " running polled\n", DEVICE_NAME, info->irq);
1da177e4
LT		 2012 info->irq = 0;
2013 return -EINVAL;
2014 } else {
b0defcdb 2015 info->irq_cleanup = acpi_gpe_irq_cleanup;
279fbd0c 2016 dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
1da177e4
LT		 2017 return 0;
2018 }
2019}
2020
1da177e4
LT		 2021/*
2022 * Defined at
631dd1a8 2023 * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
1da177e4
LT		 2024 */
2025struct SPMITable {
2026 s8 Signature[4];
2027 u32 Length;
2028 u8 Revision;
2029 u8 Checksum;
2030 s8 OEMID[6];
2031 s8 OEMTableID[8];
2032 s8 OEMRevision[4];
2033 s8 CreatorID[4];
2034 s8 CreatorRevision[4];
2035 u8 InterfaceType;
2036 u8 IPMIlegacy;
2037 s16 SpecificationRevision;
2038
2039 /*
2040 * Bit 0 - SCI interrupt supported
2041 * Bit 1 - I/O APIC/SAPIC
2042 */
2043 u8 InterruptType;
2044
c305e3d3
CM		 2045 /*
2046 * If bit 0 of InterruptType is set, then this is the SCI
2047 * interrupt in the GPEx_STS register.
2048 */
1da177e4
LT		 2049 u8 GPE;
2050
2051 s16 Reserved;
2052
c305e3d3
CM		 2053 /*
2054 * If bit 1 of InterruptType is set, then this is the I/O
2055 * APIC/SAPIC interrupt.
2056 */
1da177e4
LT		 2057 u32 GlobalSystemInterrupt;
2058
2059 /* The actual register address. */
2060 struct acpi_generic_address addr;
2061
2062 u8 UID[4];
2063
2064 s8 spmi_id[1]; /* A '\0' terminated array starts here. */
2065};
2066
2223cbec 2067static int try_init_spmi(struct SPMITable *spmi)
1da177e4
LT		 2068{
2069 struct smi_info *info;
1da177e4 2070
1da177e4 2071 if (spmi->IPMIlegacy != 1) {
279fbd0c
MS		 2072 printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
2073 return -ENODEV;
1da177e4
LT		 2074 }
2075
de5e2ddf 2076 info = smi_info_alloc();
b0defcdb 2077 if (!info) {
279fbd0c 2078 printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
b0defcdb
CM		 2079 return -ENOMEM;
2080 }
2081
5fedc4a2 2082 info->addr_source = SI_SPMI;
279fbd0c 2083 printk(KERN_INFO PFX "probing via SPMI\n");
1da177e4 2084
1da177e4 2085 /* Figure out the interface type. */
c305e3d3 2086 switch (spmi->InterfaceType) {
1da177e4 2087 case 1: /* KCS */
b0defcdb 2088 info->si_type = SI_KCS;
1da177e4 2089 break;
1da177e4 2090 case 2: /* SMIC */
b0defcdb 2091 info->si_type = SI_SMIC;
1da177e4 2092 break;
1da177e4 2093 case 3: /* BT */
b0defcdb 2094 info->si_type = SI_BT;
1da177e4 2095 break;
1da177e4 2096 default:
279fbd0c
MS		 2097 printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
2098 spmi->InterfaceType);
b0defcdb 2099 kfree(info);
1da177e4
LT		 2100 return -EIO;
2101 }
2102
1da177e4
LT		 2103 if (spmi->InterruptType & 1) {
2104 /* We've got a GPE interrupt. */
2105 info->irq = spmi->GPE;
2106 info->irq_setup = acpi_gpe_irq_setup;
1da177e4
LT		 2107 } else if (spmi->InterruptType & 2) {
2108 /* We've got an APIC/SAPIC interrupt. */
2109 info->irq = spmi->GlobalSystemInterrupt;
2110 info->irq_setup = std_irq_setup;
1da177e4
LT		 2111 } else {
2112 /* Use the default interrupt setting. */
2113 info->irq = 0;
2114 info->irq_setup = NULL;
2115 }
2116
15a58ed1 2117 if (spmi->addr.bit_width) {
35bc37a0 2118 /* A (hopefully) properly formed register bit width. */
15a58ed1 2119 info->io.regspacing = spmi->addr.bit_width / 8;
35bc37a0 2120 } else {
35bc37a0
CM		 2121 info->io.regspacing = DEFAULT_REGSPACING;
2122 }
b0defcdb 2123 info->io.regsize = info->io.regspacing;
15a58ed1 2124 info->io.regshift = spmi->addr.bit_offset;
1da177e4 2125
15a58ed1 2126 if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
1da177e4 2127 info->io_setup = mem_setup;
8fe1425a 2128 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
15a58ed1 2129 } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
1da177e4 2130 info->io_setup = port_setup;
8fe1425a 2131 info->io.addr_type = IPMI_IO_ADDR_SPACE;
1da177e4
LT		 2132 } else {
2133 kfree(info);
279fbd0c 2134 printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
1da177e4
LT		 2135 return -EIO;
2136 }
b0defcdb 2137 info->io.addr_data = spmi->addr.address;
1da177e4 2138
7bb671e3
YL		 2139 pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
2140 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2141 info->io.addr_data, info->io.regsize, info->io.regspacing,
2142 info->irq);
2143
7faefea6
YL		 2144 if (add_smi(info))
2145 kfree(info);
1da177e4 2146
1da177e4
LT		 2147 return 0;
2148}
b0defcdb 2149
2223cbec 2150static void spmi_find_bmc(void)
b0defcdb
CM		 2151{
2152 acpi_status status;
2153 struct SPMITable *spmi;
2154 int i;
2155
2156 if (acpi_disabled)
2157 return;
2158
2159 if (acpi_failure)
2160 return;
2161
2162 for (i = 0; ; i++) {
15a58ed1
AS		 2163 status = acpi_get_table(ACPI_SIG_SPMI, i+1,
2164 (struct acpi_table_header **)&spmi);
b0defcdb
CM		 2165 if (status != AE_OK)
2166 return;
2167
18a3e0bf 2168 try_init_spmi(spmi);
b0defcdb
CM		 2169 }
2170}
9e368fa0 2171
2223cbec 2172static int ipmi_pnp_probe(struct pnp_dev *dev,
9e368fa0
BH		 2173 const struct pnp_device_id *dev_id)
2174{
2175 struct acpi_device *acpi_dev;
2176 struct smi_info *info;
a9e31765 2177 struct resource *res, *res_second;
9e368fa0
BH		 2178 acpi_handle handle;
2179 acpi_status status;
2180 unsigned long long tmp;
2181
2182 acpi_dev = pnp_acpi_device(dev);
2183 if (!acpi_dev)
2184 return -ENODEV;
2185
de5e2ddf 2186 info = smi_info_alloc();
9e368fa0
BH		 2187 if (!info)
2188 return -ENOMEM;
2189
5fedc4a2 2190 info->addr_source = SI_ACPI;
279fbd0c 2191 printk(KERN_INFO PFX "probing via ACPI\n");
9e368fa0
BH		 2192
2193 handle = acpi_dev->handle;
16f4232c 2194 info->addr_info.acpi_info.acpi_handle = handle;
9e368fa0
BH		 2195
2196 /* _IFT tells us the interface type: KCS, BT, etc */
2197 status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
2198 if (ACPI_FAILURE(status))
2199 goto err_free;
2200
2201 switch (tmp) {
2202 case 1:
2203 info->si_type = SI_KCS;
2204 break;
2205 case 2:
2206 info->si_type = SI_SMIC;
2207 break;
2208 case 3:
2209 info->si_type = SI_BT;
2210 break;
2211 default:
279fbd0c 2212 dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
9e368fa0
BH		 2213 goto err_free;
2214 }
2215
279fbd0c
MS		 2216 res = pnp_get_resource(dev, IORESOURCE_IO, 0);
2217 if (res) {
9e368fa0
BH		 2218 info->io_setup = port_setup;
2219 info->io.addr_type = IPMI_IO_ADDR_SPACE;
9e368fa0 2220 } else {
279fbd0c
MS		 2221 res = pnp_get_resource(dev, IORESOURCE_MEM, 0);
2222 if (res) {
2223 info->io_setup = mem_setup;
2224 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2225 }
2226 }
2227 if (!res) {
9e368fa0
BH		 2228 dev_err(&dev->dev, "no I/O or memory address\n");
2229 goto err_free;
2230 }
279fbd0c 2231 info->io.addr_data = res->start;
9e368fa0
BH		 2232
2233 info->io.regspacing = DEFAULT_REGSPACING;
a9e31765 2234 res_second = pnp_get_resource(dev,
d9e1b6c4
YL		 2235 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
2236 IORESOURCE_IO : IORESOURCE_MEM,
2237 1);
a9e31765
YL		 2238 if (res_second) {
2239 if (res_second->start > info->io.addr_data)
2240 info->io.regspacing = res_second->start - info->io.addr_data;
d9e1b6c4 2241 }
9e368fa0
BH		 2242 info->io.regsize = DEFAULT_REGSPACING;
2243 info->io.regshift = 0;
2244
2245 /* If _GPE exists, use it; otherwise use standard interrupts */
2246 status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
2247 if (ACPI_SUCCESS(status)) {
2248 info->irq = tmp;
2249 info->irq_setup = acpi_gpe_irq_setup;
2250 } else if (pnp_irq_valid(dev, 0)) {
2251 info->irq = pnp_irq(dev, 0);
2252 info->irq_setup = std_irq_setup;
2253 }
2254
8c8eae27 2255 info->dev = &dev->dev;
9e368fa0
BH		 2256 pnp_set_drvdata(dev, info);
2257
279fbd0c
MS		 2258 dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
2259 res, info->io.regsize, info->io.regspacing,
2260 info->irq);
2261
7faefea6
YL		 2262 if (add_smi(info))
2263 goto err_free;
2264
2265 return 0;
9e368fa0
BH		 2266
2267err_free:
2268 kfree(info);
2269 return -EINVAL;
2270}
2271
39af33fc 2272static void ipmi_pnp_remove(struct pnp_dev *dev)
9e368fa0
BH		 2273{
2274 struct smi_info *info = pnp_get_drvdata(dev);
2275
2276 cleanup_one_si(info);
2277}
2278
2279static const struct pnp_device_id pnp_dev_table[] = {
2280 {"IPI0001", 0},
2281 {"", 0},
2282};
2283
2284static struct pnp_driver ipmi_pnp_driver = {
2285 .name = DEVICE_NAME,
2286 .probe = ipmi_pnp_probe,
bcd2982a 2287 .remove = ipmi_pnp_remove,
9e368fa0
BH		 2288 .id_table = pnp_dev_table,
2289};
a798e2d2
JD		 2290
2291MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
1da177e4
LT		 2292#endif
2293
a9fad4cc 2294#ifdef CONFIG_DMI
c305e3d3 2295struct dmi_ipmi_data {
1da177e4
LT		 2296 u8 type;
2297 u8 addr_space;
2298 unsigned long base_addr;
2299 u8 irq;
2300 u8 offset;
2301 u8 slave_addr;
b0defcdb 2302};
1da177e4 2303
2223cbec 2304static int decode_dmi(const struct dmi_header *dm,
b0defcdb 2305 struct dmi_ipmi_data *dmi)
1da177e4 2306{
1855256c 2307 const u8 *data = (const u8 *)dm;
1da177e4
LT		 2308 unsigned long base_addr;
2309 u8 reg_spacing;
b224cd3a 2310 u8 len = dm->length;
1da177e4 2311
b0defcdb 2312 dmi->type = data[4];
1da177e4
LT		 2313
2314 memcpy(&base_addr, data+8, sizeof(unsigned long));
2315 if (len >= 0x11) {
2316 if (base_addr & 1) {
2317 /* I/O */
2318 base_addr &= 0xFFFE;
b0defcdb 2319 dmi->addr_space = IPMI_IO_ADDR_SPACE;
c305e3d3 2320 } else
1da177e4 2321 /* Memory */
b0defcdb 2322 dmi->addr_space = IPMI_MEM_ADDR_SPACE;
c305e3d3 2323
1da177e4
LT		 2324 /* If bit 4 of byte 0x10 is set, then the lsb for the address
2325 is odd. */
b0defcdb 2326 dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
1da177e4 2327
b0defcdb 2328 dmi->irq = data[0x11];
1da177e4
LT		 2329
2330 /* The top two bits of byte 0x10 hold the register spacing. */
b224cd3a 2331 reg_spacing = (data[0x10] & 0xC0) >> 6;
c305e3d3 2332 switch (reg_spacing) {
1da177e4 2333 case 0x00: /* Byte boundaries */
b0defcdb 2334 dmi->offset = 1;
1da177e4
LT		 2335 break;
2336 case 0x01: /* 32-bit boundaries */
b0defcdb 2337 dmi->offset = 4;
1da177e4
LT		 2338 break;
2339 case 0x02: /* 16-byte boundaries */
b0defcdb 2340 dmi->offset = 16;
1da177e4
LT		 2341 break;
2342 default:
2343 /* Some other interface, just ignore it. */
2344 return -EIO;
2345 }
2346 } else {
2347 /* Old DMI spec. */
c305e3d3
CM		 2348 /*
2349 * Note that technically, the lower bit of the base
92068801
CM		 2350 * address should be 1 if the address is I/O and 0 if
2351 * the address is in memory. So many systems get that
2352 * wrong (and all that I have seen are I/O) so we just
2353 * ignore that bit and assume I/O. Systems that use
c305e3d3
CM		 2354 * memory should use the newer spec, anyway.
2355 */
b0defcdb
CM		 2356 dmi->base_addr = base_addr & 0xfffe;
2357 dmi->addr_space = IPMI_IO_ADDR_SPACE;
2358 dmi->offset = 1;
1da177e4
LT		 2359 }
2360
b0defcdb 2361 dmi->slave_addr = data[6];
1da177e4 2362
b0defcdb 2363 return 0;
1da177e4
LT		 2364}
2365
2223cbec 2366static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
1da177e4 2367{
b0defcdb 2368 struct smi_info *info;
1da177e4 2369
de5e2ddf 2370 info = smi_info_alloc();
b0defcdb 2371 if (!info) {
279fbd0c 2372 printk(KERN_ERR PFX "Could not allocate SI data\n");
b0defcdb 2373 return;
1da177e4 2374 }
1da177e4 2375
5fedc4a2 2376 info->addr_source = SI_SMBIOS;
279fbd0c 2377 printk(KERN_INFO PFX "probing via SMBIOS\n");
1da177e4 2378
e8b33617 2379 switch (ipmi_data->type) {
b0defcdb
CM		 2380 case 0x01: /* KCS */
2381 info->si_type = SI_KCS;
2382 break;
2383 case 0x02: /* SMIC */
2384 info->si_type = SI_SMIC;
2385 break;
2386 case 0x03: /* BT */
2387 info->si_type = SI_BT;
2388 break;
2389 default:
80cd6920 2390 kfree(info);
b0defcdb 2391 return;
1da177e4 2392 }
1da177e4 2393
b0defcdb
CM		 2394 switch (ipmi_data->addr_space) {
2395 case IPMI_MEM_ADDR_SPACE:
1da177e4 2396 info->io_setup = mem_setup;
b0defcdb
CM		 2397 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2398 break;
2399
2400 case IPMI_IO_ADDR_SPACE:
1da177e4 2401 info->io_setup = port_setup;
b0defcdb
CM		 2402 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2403 break;
2404
2405 default:
1da177e4 2406 kfree(info);
279fbd0c 2407 printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
b0defcdb
CM		 2408 ipmi_data->addr_space);
2409 return;
1da177e4 2410 }
b0defcdb 2411 info->io.addr_data = ipmi_data->base_addr;
1da177e4 2412
b0defcdb
CM		 2413 info->io.regspacing = ipmi_data->offset;
2414 if (!info->io.regspacing)
1da177e4
LT		 2415 info->io.regspacing = DEFAULT_REGSPACING;
2416 info->io.regsize = DEFAULT_REGSPACING;
b0defcdb 2417 info->io.regshift = 0;
1da177e4
LT		 2418
2419 info->slave_addr = ipmi_data->slave_addr;
2420
b0defcdb
CM		 2421 info->irq = ipmi_data->irq;
2422 if (info->irq)
2423 info->irq_setup = std_irq_setup;
1da177e4 2424
7bb671e3
YL		 2425 pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
2426 (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
2427 info->io.addr_data, info->io.regsize, info->io.regspacing,
2428 info->irq);
2429
7faefea6
YL		 2430 if (add_smi(info))
2431 kfree(info);
b0defcdb 2432}
1da177e4 2433
2223cbec 2434static void dmi_find_bmc(void)
b0defcdb 2435{
1855256c 2436 const struct dmi_device *dev = NULL;
b0defcdb
CM		 2437 struct dmi_ipmi_data data;
2438 int rv;
2439
2440 while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
397f4ebf 2441 memset(&data, 0, sizeof(data));
1855256c
JG		 2442 rv = decode_dmi((const struct dmi_header *) dev->device_data,
2443 &data);
b0defcdb
CM		 2444 if (!rv)
2445 try_init_dmi(&data);
2446 }
1da177e4 2447}
a9fad4cc 2448#endif /* CONFIG_DMI */
1da177e4
LT		 2449
2450#ifdef CONFIG_PCI
2451
b0defcdb
CM		 2452#define PCI_ERMC_CLASSCODE 0x0C0700
2453#define PCI_ERMC_CLASSCODE_MASK 0xffffff00
2454#define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
2455#define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
2456#define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
2457#define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
2458
1da177e4
LT		 2459#define PCI_HP_VENDOR_ID 0x103C
2460#define PCI_MMC_DEVICE_ID 0x121A
2461#define PCI_MMC_ADDR_CW 0x10
2462
b0defcdb
CM		 2463static void ipmi_pci_cleanup(struct smi_info *info)
2464{
2465 struct pci_dev *pdev = info->addr_source_data;
2466
2467 pci_disable_device(pdev);
2468}
1da177e4 2469
2223cbec 2470static int ipmi_pci_probe_regspacing(struct smi_info *info)
a6c16c28
CM		 2471{
2472 if (info->si_type == SI_KCS) {
2473 unsigned char status;
2474 int regspacing;
2475
2476 info->io.regsize = DEFAULT_REGSIZE;
2477 info->io.regshift = 0;
2478 info->io_size = 2;
2479 info->handlers = &kcs_smi_handlers;
2480
2481 /* detect 1, 4, 16byte spacing */
2482 for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) {
2483 info->io.regspacing = regspacing;
2484 if (info->io_setup(info)) {
2485 dev_err(info->dev,
2486 "Could not setup I/O space\n");
2487 return DEFAULT_REGSPACING;
2488 }
2489 /* write invalid cmd */
2490 info->io.outputb(&info->io, 1, 0x10);
2491 /* read status back */
2492 status = info->io.inputb(&info->io, 1);
2493 info->io_cleanup(info);
2494 if (status)
2495 return regspacing;
2496 regspacing *= 4;
2497 }
2498 }
2499 return DEFAULT_REGSPACING;
2500}
2501
2223cbec 2502static int ipmi_pci_probe(struct pci_dev *pdev,
b0defcdb 2503 const struct pci_device_id *ent)
1da177e4 2504{
b0defcdb
CM		 2505 int rv;
2506 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
2507 struct smi_info *info;
1da177e4 2508
de5e2ddf 2509 info = smi_info_alloc();
b0defcdb 2510 if (!info)
1cd441f9 2511 return -ENOMEM;
1da177e4 2512
5fedc4a2 2513 info->addr_source = SI_PCI;
279fbd0c 2514 dev_info(&pdev->dev, "probing via PCI");
1da177e4 2515
b0defcdb
CM		 2516 switch (class_type) {
2517 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
2518 info->si_type = SI_SMIC;
2519 break;
1da177e4 2520
b0defcdb
CM		 2521 case PCI_ERMC_CLASSCODE_TYPE_KCS:
2522 info->si_type = SI_KCS;
2523 break;
2524
2525 case PCI_ERMC_CLASSCODE_TYPE_BT:
2526 info->si_type = SI_BT;
2527 break;
2528
2529 default:
2530 kfree(info);
279fbd0c 2531 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
1cd441f9 2532 return -ENOMEM;
1da177e4
LT		 2533 }
2534
b0defcdb
CM		 2535 rv = pci_enable_device(pdev);
2536 if (rv) {
279fbd0c 2537 dev_err(&pdev->dev, "couldn't enable PCI device\n");
b0defcdb
CM		 2538 kfree(info);
2539 return rv;
1da177e4
LT		 2540 }
2541
b0defcdb
CM		 2542 info->addr_source_cleanup = ipmi_pci_cleanup;
2543 info->addr_source_data = pdev;
1da177e4 2544
b0defcdb
CM		 2545 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
2546 info->io_setup = port_setup;
2547 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2548 } else {
2549 info->io_setup = mem_setup;
2550 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
1da177e4 2551 }
b0defcdb 2552 info->io.addr_data = pci_resource_start(pdev, 0);
1da177e4 2553
a6c16c28
CM		 2554 info->io.regspacing = ipmi_pci_probe_regspacing(info);
2555 info->io.regsize = DEFAULT_REGSIZE;
b0defcdb 2556 info->io.regshift = 0;
1da177e4 2557
b0defcdb
CM		 2558 info->irq = pdev->irq;
2559 if (info->irq)
2560 info->irq_setup = std_irq_setup;
1da177e4 2561
50c812b2 2562 info->dev = &pdev->dev;
fca3b747 2563 pci_set_drvdata(pdev, info);
50c812b2 2564
279fbd0c
MS		 2565 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
2566 &pdev->resource[0], info->io.regsize, info->io.regspacing,
2567 info->irq);
2568
7faefea6
YL		 2569 if (add_smi(info))
2570 kfree(info);
2571
2572 return 0;
b0defcdb 2573}
1da177e4 2574
39af33fc 2575static void ipmi_pci_remove(struct pci_dev *pdev)
b0defcdb 2576{
fca3b747
CM		 2577 struct smi_info *info = pci_get_drvdata(pdev);
2578 cleanup_one_si(info);
b0defcdb 2579}
1da177e4 2580
b0defcdb
CM		 2581static struct pci_device_id ipmi_pci_devices[] = {
2582 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
248bdd5e
KC		 2583 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
2584 { 0, }
b0defcdb
CM		 2585};
2586MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
2587
2588static struct pci_driver ipmi_pci_driver = {
c305e3d3
CM		 2589 .name = DEVICE_NAME,
2590 .id_table = ipmi_pci_devices,
2591 .probe = ipmi_pci_probe,
bcd2982a 2592 .remove = ipmi_pci_remove,
b0defcdb
CM		 2593};
2594#endif /* CONFIG_PCI */
1da177e4 2595
b1608d69 2596static struct of_device_id ipmi_match[];
2223cbec 2597static int ipmi_probe(struct platform_device *dev)
dba9b4f6 2598{
a1e9c9dd 2599#ifdef CONFIG_OF
b1608d69 2600 const struct of_device_id *match;
dba9b4f6
CM		 2601 struct smi_info *info;
2602 struct resource resource;
da81c3b9 2603 const __be32 *regsize, *regspacing, *regshift;
61c7a080 2604 struct device_node *np = dev->dev.of_node;
dba9b4f6
CM		 2605 int ret;
2606 int proplen;
2607
279fbd0c 2608 dev_info(&dev->dev, "probing via device tree\n");
dba9b4f6 2609
b1608d69
GL		 2610 match = of_match_device(ipmi_match, &dev->dev);
2611 if (!match)
a1e9c9dd
RH		 2612 return -EINVAL;
2613
dba9b4f6
CM		 2614 ret = of_address_to_resource(np, 0, &resource);
2615 if (ret) {
2616 dev_warn(&dev->dev, PFX "invalid address from OF\n");
2617 return ret;
2618 }
2619
9c25099d 2620 regsize = of_get_property(np, "reg-size", &proplen);
dba9b4f6
CM		 2621 if (regsize && proplen != 4) {
2622 dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
2623 return -EINVAL;
2624 }
2625
9c25099d 2626 regspacing = of_get_property(np, "reg-spacing", &proplen);
dba9b4f6
CM		 2627 if (regspacing && proplen != 4) {
2628 dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
2629 return -EINVAL;
2630 }
2631
9c25099d 2632 regshift = of_get_property(np, "reg-shift", &proplen);
dba9b4f6
CM		 2633 if (regshift && proplen != 4) {
2634 dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
2635 return -EINVAL;
2636 }
2637
de5e2ddf 2638 info = smi_info_alloc();
dba9b4f6
CM		 2639
2640 if (!info) {
2641 dev_err(&dev->dev,
279fbd0c 2642 "could not allocate memory for OF probe\n");
dba9b4f6
CM		 2643 return -ENOMEM;
2644 }
2645
b1608d69 2646 info->si_type = (enum si_type) match->data;
5fedc4a2 2647 info->addr_source = SI_DEVICETREE;
dba9b4f6
CM		 2648 info->irq_setup = std_irq_setup;
2649
3b7ec117
NC		 2650 if (resource.flags & IORESOURCE_IO) {
2651 info->io_setup = port_setup;
2652 info->io.addr_type = IPMI_IO_ADDR_SPACE;
2653 } else {
2654 info->io_setup = mem_setup;
2655 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2656 }
2657
dba9b4f6
CM		 2658 info->io.addr_data = resource.start;
2659
da81c3b9
RH		 2660 info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
2661 info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
2662 info->io.regshift = regshift ? be32_to_cpup(regshift) : 0;
dba9b4f6 2663
61c7a080 2664 info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
dba9b4f6
CM		 2665 info->dev = &dev->dev;
2666
279fbd0c 2667 dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
dba9b4f6
CM		 2668 info->io.addr_data, info->io.regsize, info->io.regspacing,
2669 info->irq);
2670
9de33df4 2671 dev_set_drvdata(&dev->dev, info);
dba9b4f6 2672
7faefea6
YL		 2673 if (add_smi(info)) {
2674 kfree(info);
2675 return -EBUSY;
2676 }
a1e9c9dd 2677#endif
7faefea6 2678 return 0;
dba9b4f6
CM		 2679}
2680
39af33fc 2681static int ipmi_remove(struct platform_device *dev)
dba9b4f6 2682{
a1e9c9dd 2683#ifdef CONFIG_OF
9de33df4 2684 cleanup_one_si(dev_get_drvdata(&dev->dev));
a1e9c9dd 2685#endif
dba9b4f6
CM		 2686 return 0;
2687}
2688
2689static struct of_device_id ipmi_match[] =
2690{
c305e3d3
CM		 2691 { .type = "ipmi", .compatible = "ipmi-kcs",
2692 .data = (void *)(unsigned long) SI_KCS },
2693 { .type = "ipmi", .compatible = "ipmi-smic",
2694 .data = (void *)(unsigned long) SI_SMIC },
2695 { .type = "ipmi", .compatible = "ipmi-bt",
2696 .data = (void *)(unsigned long) SI_BT },
dba9b4f6
CM		 2697 {},
2698};
2699
a1e9c9dd 2700static struct platform_driver ipmi_driver = {
4018294b 2701 .driver = {
a1e9c9dd 2702 .name = DEVICE_NAME,
4018294b
GL		 2703 .owner = THIS_MODULE,
2704 .of_match_table = ipmi_match,
2705 },
a1e9c9dd 2706 .probe = ipmi_probe,
bcd2982a 2707 .remove = ipmi_remove,
dba9b4f6 2708};
dba9b4f6 2709
fdbeb7de
TB		 2710#ifdef CONFIG_PARISC
2711static int ipmi_parisc_probe(struct parisc_device *dev)
2712{
2713 struct smi_info *info;
2714
2715 info = smi_info_alloc();
2716
2717 if (!info) {
2718 dev_err(&dev->dev,
2719 "could not allocate memory for PARISC probe\n");
2720 return -ENOMEM;
2721 }
2722
2723 info->si_type = SI_KCS;
2724 info->addr_source = SI_DEVICETREE;
2725 info->io_setup = mem_setup;
2726 info->io.addr_type = IPMI_MEM_ADDR_SPACE;
2727 info->io.addr_data = dev->hpa.start;
2728 info->io.regsize = 1;
2729 info->io.regspacing = 1;
2730 info->io.regshift = 0;
2731 info->irq = 0; /* no interrupt */
2732 info->irq_setup = NULL;
2733 info->dev = &dev->dev;
2734
2735 dev_dbg(&dev->dev, "addr 0x%lx\n", info->io.addr_data);
2736
2737 dev_set_drvdata(&dev->dev, info);
2738
2739 if (add_smi(info)) {
2740 kfree(info);
2741 return -EBUSY;
2742 }
2743
2744 return 0;
2745}
2746
2747static int ipmi_parisc_remove(struct parisc_device *dev)
2748{
2749 cleanup_one_si(dev_get_drvdata(&dev->dev));
2750 return 0;
2751}
2752
2753static struct parisc_device_id ipmi_parisc_tbl[] = {
2754 { HPHW_MC, HVERSION_REV_ANY_ID, 0x004, 0xC0 },
2755 { 0, }
2756};
2757
2758static struct parisc_driver ipmi_parisc_driver = {
2759 .name = "ipmi",
2760 .id_table = ipmi_parisc_tbl,
2761 .probe = ipmi_parisc_probe,
2762 .remove = ipmi_parisc_remove,
2763};
2764#endif /* CONFIG_PARISC */
2765
40112ae7 2766static int wait_for_msg_done(struct smi_info *smi_info)
1da177e4 2767{
50c812b2 2768 enum si_sm_result smi_result;
1da177e4
LT		 2769
2770 smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
c305e3d3 2771 for (;;) {
c3e7e791
CM		 2772 if (smi_result == SI_SM_CALL_WITH_DELAY ||
2773 smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
da4cd8df 2774 schedule_timeout_uninterruptible(1);
1da177e4
LT		 2775 smi_result = smi_info->handlers->event(
2776 smi_info->si_sm, 100);
c305e3d3 2777 } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
1da177e4
LT		 2778 smi_result = smi_info->handlers->event(
2779 smi_info->si_sm, 0);
c305e3d3 2780 } else
1da177e4
LT		 2781 break;
2782 }
40112ae7 2783 if (smi_result == SI_SM_HOSED)
c305e3d3
CM		 2784 /*
2785 * We couldn't get the state machine to run, so whatever's at
2786 * the port is probably not an IPMI SMI interface.
2787 */
40112ae7
CM		 2788 return -ENODEV;
2789
2790 return 0;
2791}
2792
2793static int try_get_dev_id(struct smi_info *smi_info)
2794{
2795 unsigned char msg[2];
2796 unsigned char *resp;
2797 unsigned long resp_len;
2798 int rv = 0;
2799
2800 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2801 if (!resp)
2802 return -ENOMEM;
2803
2804 /*
2805 * Do a Get Device ID command, since it comes back with some
2806 * useful info.
2807 */
2808 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2809 msg[1] = IPMI_GET_DEVICE_ID_CMD;
2810 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2811
2812 rv = wait_for_msg_done(smi_info);
2813 if (rv)
1da177e4 2814 goto out;
1da177e4 2815
1da177e4
LT		 2816 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2817 resp, IPMI_MAX_MSG_LENGTH);
1da177e4 2818
d8c98618
CM		 2819 /* Check and record info from the get device id, in case we need it. */
2820 rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
1da177e4
LT		 2821
2822 out:
2823 kfree(resp);
2824 return rv;
2825}
2826
40112ae7
CM		 2827static int try_enable_event_buffer(struct smi_info *smi_info)
2828{
2829 unsigned char msg[3];
2830 unsigned char *resp;
2831 unsigned long resp_len;
2832 int rv = 0;
2833
2834 resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
2835 if (!resp)
2836 return -ENOMEM;
2837
2838 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2839 msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
2840 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
2841
2842 rv = wait_for_msg_done(smi_info);
2843 if (rv) {
279fbd0c
MS		 2844 printk(KERN_WARNING PFX "Error getting response from get"
2845 " global enables command, the event buffer is not"
40112ae7
CM		 2846 " enabled.\n");
2847 goto out;
2848 }
2849
2850 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2851 resp, IPMI_MAX_MSG_LENGTH);
2852
2853 if (resp_len < 4 ||
2854 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2855 resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
2856 resp[2] != 0) {
279fbd0c
MS		 2857 printk(KERN_WARNING PFX "Invalid return from get global"
2858 " enables command, cannot enable the event buffer.\n");
40112ae7
CM		 2859 rv = -EINVAL;
2860 goto out;
2861 }
2862
2863 if (resp[3] & IPMI_BMC_EVT_MSG_BUFF)
2864 /* buffer is already enabled, nothing to do. */
2865 goto out;
2866
2867 msg[0] = IPMI_NETFN_APP_REQUEST << 2;
2868 msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
2869 msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
2870 smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
2871
2872 rv = wait_for_msg_done(smi_info);
2873 if (rv) {
279fbd0c
MS		 2874 printk(KERN_WARNING PFX "Error getting response from set"
2875 " global, enables command, the event buffer is not"
40112ae7
CM		 2876 " enabled.\n");
2877 goto out;
2878 }
2879
2880 resp_len = smi_info->handlers->get_result(smi_info->si_sm,
2881 resp, IPMI_MAX_MSG_LENGTH);
2882
2883 if (resp_len < 3 ||
2884 resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
2885 resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
279fbd0c
MS		 2886 printk(KERN_WARNING PFX "Invalid return from get global,"
2887 "enables command, not enable the event buffer.\n");
40112ae7
CM		 2888 rv = -EINVAL;
2889 goto out;
2890 }
2891
2892 if (resp[2] != 0)
2893 /*
2894 * An error when setting the event buffer bit means
2895 * that the event buffer is not supported.
2896 */
2897 rv = -ENOENT;
2898 out:
2899 kfree(resp);
2900 return rv;
2901}
2902
07412736 2903static int smi_type_proc_show(struct seq_file *m, void *v)
1da177e4 2904{
07412736 2905 struct smi_info *smi = m->private;
1da177e4 2906
07412736 2907 return seq_printf(m, "%s\n", si_to_str[smi->si_type]);
1da177e4
LT		 2908}
2909
07412736 2910static int smi_type_proc_open(struct inode *inode, struct file *file)
1da177e4 2911{
d9dda78b 2912 return single_open(file, smi_type_proc_show, PDE_DATA(inode));
07412736
AD		 2913}
2914
2915static const struct file_operations smi_type_proc_ops = {
2916 .open = smi_type_proc_open,
2917 .read = seq_read,
2918 .llseek = seq_lseek,
2919 .release = single_release,
2920};
2921
2922static int smi_si_stats_proc_show(struct seq_file *m, void *v)
2923{
2924 struct smi_info *smi = m->private;
1da177e4 2925
07412736 2926 seq_printf(m, "interrupts_enabled: %d\n",
b0defcdb 2927 smi->irq && !smi->interrupt_disabled);
07412736 2928 seq_printf(m, "short_timeouts: %u\n",
64959e2d 2929 smi_get_stat(smi, short_timeouts));
07412736 2930 seq_printf(m, "long_timeouts: %u\n",
64959e2d 2931 smi_get_stat(smi, long_timeouts));
07412736 2932 seq_printf(m, "idles: %u\n",
64959e2d 2933 smi_get_stat(smi, idles));
07412736 2934 seq_printf(m, "interrupts: %u\n",
64959e2d 2935 smi_get_stat(smi, interrupts));
07412736 2936 seq_printf(m, "attentions: %u\n",
64959e2d 2937 smi_get_stat(smi, attentions));
07412736 2938 seq_printf(m, "flag_fetches: %u\n",
64959e2d 2939 smi_get_stat(smi, flag_fetches));
07412736 2940 seq_printf(m, "hosed_count: %u\n",
64959e2d 2941 smi_get_stat(smi, hosed_count));
07412736 2942 seq_printf(m, "complete_transactions: %u\n",
64959e2d 2943 smi_get_stat(smi, complete_transactions));
07412736 2944 seq_printf(m, "events: %u\n",
64959e2d 2945 smi_get_stat(smi, events));
07412736 2946 seq_printf(m, "watchdog_pretimeouts: %u\n",
64959e2d 2947 smi_get_stat(smi, watchdog_pretimeouts));
07412736 2948 seq_printf(m, "incoming_messages: %u\n",
64959e2d 2949 smi_get_stat(smi, incoming_messages));
07412736
AD		 2950 return 0;
2951}
1da177e4 2952
07412736
AD		 2953static int smi_si_stats_proc_open(struct inode *inode, struct file *file)
2954{
d9dda78b 2955 return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode));
b361e27b
CM		 2956}
2957
07412736
AD		 2958static const struct file_operations smi_si_stats_proc_ops = {
2959 .open = smi_si_stats_proc_open,
2960 .read = seq_read,
2961 .llseek = seq_lseek,
2962 .release = single_release,
2963};
2964
2965static int smi_params_proc_show(struct seq_file *m, void *v)
b361e27b 2966{
07412736 2967 struct smi_info *smi = m->private;
b361e27b 2968
07412736 2969 return seq_printf(m,
b361e27b
CM		 2970 "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
2971 si_to_str[smi->si_type],
2972 addr_space_to_str[smi->io.addr_type],
2973 smi->io.addr_data,
2974 smi->io.regspacing,
2975 smi->io.regsize,
2976 smi->io.regshift,
2977 smi->irq,
2978 smi->slave_addr);
1da177e4
LT		 2979}
2980
07412736
AD		 2981static int smi_params_proc_open(struct inode *inode, struct file *file)
2982{
d9dda78b 2983 return single_open(file, smi_params_proc_show, PDE_DATA(inode));
07412736
AD		 2984}
2985
2986static const struct file_operations smi_params_proc_ops = {
2987 .open = smi_params_proc_open,
2988 .read = seq_read,
2989 .llseek = seq_lseek,
2990 .release = single_release,
2991};
2992
3ae0e0f9
CM		 2993/*
2994 * oem_data_avail_to_receive_msg_avail
2995 * @info - smi_info structure with msg_flags set
2996 *
2997 * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
2998 * Returns 1 indicating need to re-run handle_flags().
2999 */
3000static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
3001{
e8b33617 3002 smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
c305e3d3 3003 RECEIVE_MSG_AVAIL);
3ae0e0f9
CM		 3004 return 1;
3005}
3006
3007/*
3008 * setup_dell_poweredge_oem_data_handler
3009 * @info - smi_info.device_id must be populated
3010 *
3011 * Systems that match, but have firmware version < 1.40 may assert
3012 * OEM0_DATA_AVAIL on their own, without being told via Set Flags that
3013 * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
3014 * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
3015 * as RECEIVE_MSG_AVAIL instead.
3016 *
3017 * As Dell has no plans to release IPMI 1.5 firmware that *ever*
3018 * assert the OEM[012] bits, and if it did, the driver would have to
3019 * change to handle that properly, we don't actually check for the
3020 * firmware version.
3021 * Device ID = 0x20 BMC on PowerEdge 8G servers
3022 * Device Revision = 0x80
3023 * Firmware Revision1 = 0x01 BMC version 1.40
3024 * Firmware Revision2 = 0x40 BCD encoded
3025 * IPMI Version = 0x51 IPMI 1.5
3026 * Manufacturer ID = A2 02 00 Dell IANA
3027 *
d5a2b89a
CM		 3028 * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
3029 * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
3030 *
3ae0e0f9
CM		 3031 */
3032#define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
3033#define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
3034#define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
50c812b2 3035#define DELL_IANA_MFR_ID 0x0002a2
3ae0e0f9
CM		 3036static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
3037{
3038 struct ipmi_device_id *id = &smi_info->device_id;
50c812b2 3039 if (id->manufacturer_id == DELL_IANA_MFR_ID) {
d5a2b89a
CM		 3040 if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
3041 id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
50c812b2 3042 id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
d5a2b89a
CM		 3043 smi_info->oem_data_avail_handler =
3044 oem_data_avail_to_receive_msg_avail;
c305e3d3
CM		 3045 } else if (ipmi_version_major(id) < 1 ||
3046 (ipmi_version_major(id) == 1 &&
3047 ipmi_version_minor(id) < 5)) {
d5a2b89a
CM		 3048 smi_info->oem_data_avail_handler =
3049 oem_data_avail_to_receive_msg_avail;
3050 }
3ae0e0f9
CM		 3051 }
3052}
3053
ea94027b
CM		 3054#define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
3055static void return_hosed_msg_badsize(struct smi_info *smi_info)
3056{
3057 struct ipmi_smi_msg *msg = smi_info->curr_msg;
3058
25985edc 3059 /* Make it a response */
ea94027b
CM		 3060 msg->rsp[0] = msg->data[0] | 4;
3061 msg->rsp[1] = msg->data[1];
3062 msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
3063 msg->rsp_size = 3;
3064 smi_info->curr_msg = NULL;
3065 deliver_recv_msg(smi_info, msg);
3066}
3067
3068/*
3069 * dell_poweredge_bt_xaction_handler
3070 * @info - smi_info.device_id must be populated
3071 *
3072 * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
3073 * not respond to a Get SDR command if the length of the data
3074 * requested is exactly 0x3A, which leads to command timeouts and no
3075 * data returned. This intercepts such commands, and causes userspace
3076 * callers to try again with a different-sized buffer, which succeeds.
3077 */
3078
3079#define STORAGE_NETFN 0x0A
3080#define STORAGE_CMD_GET_SDR 0x23
3081static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
3082 unsigned long unused,
3083 void *in)
3084{
3085 struct smi_info *smi_info = in;
3086 unsigned char *data = smi_info->curr_msg->data;
3087 unsigned int size = smi_info->curr_msg->data_size;
3088 if (size >= 8 &&
3089 (data[0]>>2) == STORAGE_NETFN &&
3090 data[1] == STORAGE_CMD_GET_SDR &&
3091 data[7] == 0x3A) {
3092 return_hosed_msg_badsize(smi_info);
3093 return NOTIFY_STOP;
3094 }
3095 return NOTIFY_DONE;
3096}
3097
3098static struct notifier_block dell_poweredge_bt_xaction_notifier = {
3099 .notifier_call = dell_poweredge_bt_xaction_handler,
3100};
3101
3102/*
3103 * setup_dell_poweredge_bt_xaction_handler
3104 * @info - smi_info.device_id must be filled in already
3105 *
3106 * Fills in smi_info.device_id.start_transaction_pre_hook
3107 * when we know what function to use there.
3108 */
3109static void
3110setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
3111{
3112 struct ipmi_device_id *id = &smi_info->device_id;
50c812b2 3113 if (id->manufacturer_id == DELL_IANA_MFR_ID &&
ea94027b
CM		 3114 smi_info->si_type == SI_BT)
3115 register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
3116}
3117
3ae0e0f9
CM		 3118/*
3119 * setup_oem_data_handler
3120 * @info - smi_info.device_id must be filled in already
3121 *
3122 * Fills in smi_info.device_id.oem_data_available_handler
3123 * when we know what function to use there.
3124 */
3125
3126static void setup_oem_data_handler(struct smi_info *smi_info)
3127{
3128 setup_dell_poweredge_oem_data_handler(smi_info);
3129}
3130
ea94027b
CM		 3131static void setup_xaction_handlers(struct smi_info *smi_info)
3132{
3133 setup_dell_poweredge_bt_xaction_handler(smi_info);
3134}
3135
a9a2c44f
CM		 3136static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
3137{
453823ba 3138 if (smi_info->intf) {
c305e3d3
CM		 3139 /*
3140 * The timer and thread are only running if the
3141 * interface has been started up and registered.
3142 */
453823ba
CM		 3143 if (smi_info->thread != NULL)
3144 kthread_stop(smi_info->thread);
3145 del_timer_sync(&smi_info->si_timer);
3146 }
a9a2c44f
CM		 3147}
3148
0bbed20e 3149static struct ipmi_default_vals
b0defcdb
CM		 3150{
3151 int type;
3152 int port;
7420884c 3153} ipmi_defaults[] =
b0defcdb
CM		 3154{
3155 { .type = SI_KCS, .port = 0xca2 },
3156 { .type = SI_SMIC, .port = 0xca9 },
3157 { .type = SI_BT, .port = 0xe4 },
3158 { .port = 0 }
3159};
3160
2223cbec 3161static void default_find_bmc(void)
b0defcdb
CM		 3162{
3163 struct smi_info *info;
3164 int i;
3165
3166 for (i = 0; ; i++) {
3167 if (!ipmi_defaults[i].port)
3168 break;
68e1ee62 3169#ifdef CONFIG_PPC
4ff31d77
CK		 3170 if (check_legacy_ioport(ipmi_defaults[i].port))
3171 continue;
3172#endif
de5e2ddf 3173 info = smi_info_alloc();
a09f4855
AM		 3174 if (!info)
3175 return;
4ff31d77 3176
5fedc4a2 3177 info->addr_source = SI_DEFAULT;
b0defcdb
CM		 3178
3179 info->si_type = ipmi_defaults[i].type;
3180 info->io_setup = port_setup;
3181 info->io.addr_data = ipmi_defaults[i].port;
3182 info->io.addr_type = IPMI_IO_ADDR_SPACE;
3183
3184 info->io.addr = NULL;
3185 info->io.regspacing = DEFAULT_REGSPACING;
3186 info->io.regsize = DEFAULT_REGSPACING;
3187 info->io.regshift = 0;
3188
2407d77a
MG		 3189 if (add_smi(info) == 0) {
3190 if ((try_smi_init(info)) == 0) {
3191 /* Found one... */
279fbd0c 3192 printk(KERN_INFO PFX "Found default %s"
2407d77a
MG		 3193 " state machine at %s address 0x%lx\n",
3194 si_to_str[info->si_type],
3195 addr_space_to_str[info->io.addr_type],
3196 info->io.addr_data);
3197 } else
3198 cleanup_one_si(info);
7faefea6
YL		 3199 } else {
3200 kfree(info);
b0defcdb
CM		 3201 }
3202 }
3203}
3204
3205static int is_new_interface(struct smi_info *info)
1da177e4 3206{
b0defcdb 3207 struct smi_info *e;
1da177e4 3208
b0defcdb
CM		 3209 list_for_each_entry(e, &smi_infos, link) {
3210 if (e->io.addr_type != info->io.addr_type)
3211 continue;
3212 if (e->io.addr_data == info->io.addr_data)
3213 return 0;
3214 }
1da177e4 3215
b0defcdb
CM		 3216 return 1;
3217}
1da177e4 3218
2407d77a 3219static int add_smi(struct smi_info *new_smi)
b0defcdb 3220{
2407d77a 3221 int rv = 0;
b0defcdb 3222
279fbd0c 3223 printk(KERN_INFO PFX "Adding %s-specified %s state machine",
2407d77a
MG		 3224 ipmi_addr_src_to_str[new_smi->addr_source],
3225 si_to_str[new_smi->si_type]);
d6dfd131 3226 mutex_lock(&smi_infos_lock);
b0defcdb 3227 if (!is_new_interface(new_smi)) {
7bb671e3 3228 printk(KERN_CONT " duplicate interface\n");
b0defcdb
CM		 3229 rv = -EBUSY;
3230 goto out_err;
3231 }
1da177e4 3232
2407d77a
MG		 3233 printk(KERN_CONT "\n");
3234
1da177e4
LT		 3235 /* So we know not to free it unless we have allocated one. */
3236 new_smi->intf = NULL;
3237 new_smi->si_sm = NULL;
3238 new_smi->handlers = NULL;
3239
2407d77a
MG		 3240 list_add_tail(&new_smi->link, &smi_infos);
3241
3242out_err:
3243 mutex_unlock(&smi_infos_lock);
3244 return rv;
3245}
3246
3247static int try_smi_init(struct smi_info *new_smi)
3248{
3249 int rv = 0;
3250 int i;
3251
279fbd0c 3252 printk(KERN_INFO PFX "Trying %s-specified %s state"
2407d77a
MG		 3253 " machine at %s address 0x%lx, slave address 0x%x,"
3254 " irq %d\n",
3255 ipmi_addr_src_to_str[new_smi->addr_source],
3256 si_to_str[new_smi->si_type],
3257 addr_space_to_str[new_smi->io.addr_type],
3258 new_smi->io.addr_data,
3259 new_smi->slave_addr, new_smi->irq);
3260
b0defcdb
CM		 3261 switch (new_smi->si_type) {
3262 case SI_KCS:
1da177e4 3263 new_smi->handlers = &kcs_smi_handlers;
b0defcdb
CM		 3264 break;
3265
3266 case SI_SMIC:
1da177e4 3267 new_smi->handlers = &smic_smi_handlers;
b0defcdb
CM		 3268 break;
3269
3270 case SI_BT:
1da177e4 3271 new_smi->handlers = &bt_smi_handlers;
b0defcdb
CM		 3272 break;
3273
3274 default:
1da177e4
LT		 3275 /* No support for anything else yet. */
3276 rv = -EIO;
3277 goto out_err;
3278 }
3279
3280 /* Allocate the state machine's data and initialize it. */
3281 new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
b0defcdb 3282 if (!new_smi->si_sm) {
279fbd0c
MS		 3283 printk(KERN_ERR PFX
3284 "Could not allocate state machine memory\n");
1da177e4
LT		 3285 rv = -ENOMEM;
3286 goto out_err;
3287 }
3288 new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
3289 &new_smi->io);
3290
3291 /* Now that we know the I/O size, we can set up the I/O. */
3292 rv = new_smi->io_setup(new_smi);
3293 if (rv) {
279fbd0c 3294 printk(KERN_ERR PFX "Could not set up I/O space\n");
1da177e4
LT		 3295 goto out_err;
3296 }
3297
1da177e4
LT		 3298 /* Do low-level detection first. */
3299 if (new_smi->handlers->detect(new_smi->si_sm)) {
b0defcdb 3300 if (new_smi->addr_source)
279fbd0c 3301 printk(KERN_INFO PFX "Interface detection failed\n");
1da177e4
LT		 3302 rv = -ENODEV;
3303 goto out_err;
3304 }
3305
c305e3d3
CM		 3306 /*
3307 * Attempt a get device id command. If it fails, we probably
3308 * don't have a BMC here.
3309 */
1da177e4 3310 rv = try_get_dev_id(new_smi);
b0defcdb
CM		 3311 if (rv) {
3312 if (new_smi->addr_source)
279fbd0c 3313 printk(KERN_INFO PFX "There appears to be no BMC"
b0defcdb 3314 " at this location\n");
1da177e4 3315 goto out_err;
b0defcdb 3316 }
1da177e4 3317
3ae0e0f9 3318 setup_oem_data_handler(new_smi);
ea94027b 3319 setup_xaction_handlers(new_smi);
3ae0e0f9 3320
1da177e4
LT		 3321 INIT_LIST_HEAD(&(new_smi->xmit_msgs));
3322 INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
3323 new_smi->curr_msg = NULL;
3324 atomic_set(&new_smi->req_events, 0);
3325 new_smi->run_to_completion = 0;
64959e2d
CM		 3326 for (i = 0; i < SI_NUM_STATS; i++)
3327 atomic_set(&new_smi->stats[i], 0);
1da177e4 3328
ea4078ca 3329 new_smi->interrupt_disabled = 1;
a9a2c44f 3330 atomic_set(&new_smi->stop_operation, 0);
b0defcdb
CM		 3331 new_smi->intf_num = smi_num;
3332 smi_num++;
1da177e4 3333
40112ae7
CM		 3334 rv = try_enable_event_buffer(new_smi);
3335 if (rv == 0)
3336 new_smi->has_event_buffer = 1;
3337
c305e3d3
CM		 3338 /*
3339 * Start clearing the flags before we enable interrupts or the
3340 * timer to avoid racing with the timer.
3341 */
1da177e4
LT		 3342 start_clear_flags(new_smi);
3343 /* IRQ is defined to be set when non-zero. */
3344 if (new_smi->irq)
3345 new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ;
3346
50c812b2 3347 if (!new_smi->dev) {
c305e3d3
CM		 3348 /*
3349 * If we don't already have a device from something
3350 * else (like PCI), then register a new one.
3351 */
50c812b2
CM		 3352 new_smi->pdev = platform_device_alloc("ipmi_si",
3353 new_smi->intf_num);
8b32b5d0 3354 if (!new_smi->pdev) {
279fbd0c
MS		 3355 printk(KERN_ERR PFX
3356 "Unable to allocate platform device\n");
453823ba 3357 goto out_err;
50c812b2
CM		 3358 }
3359 new_smi->dev = &new_smi->pdev->dev;
fe2d5ffc 3360 new_smi->dev->driver = &ipmi_driver.driver;
50c812b2 3361
b48f5457 3362 rv = platform_device_add(new_smi->pdev);
50c812b2 3363 if (rv) {
279fbd0c
MS		 3364 printk(KERN_ERR PFX
3365 "Unable to register system interface device:"
50c812b2
CM		 3366 " %d\n",
3367 rv);
453823ba 3368 goto out_err;
50c812b2
CM		 3369 }
3370 new_smi->dev_registered = 1;
3371 }
3372
1da177e4
LT		 3373 rv = ipmi_register_smi(&handlers,
3374 new_smi,
50c812b2
CM		 3375 &new_smi->device_id,
3376 new_smi->dev,
759643b8 3377 "bmc",
453823ba 3378 new_smi->slave_addr);
1da177e4 3379 if (rv) {
279fbd0c
MS		 3380 dev_err(new_smi->dev, "Unable to register device: error %d\n",
3381 rv);
1da177e4
LT		 3382 goto out_err_stop_timer;
3383 }
3384
3385 rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
07412736 3386 &smi_type_proc_ops,
99b76233 3387 new_smi);
1da177e4 3388 if (rv) {
279fbd0c 3389 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
1da177e4
LT		 3390 goto out_err_stop_timer;
3391 }
3392
3393 rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
07412736 3394 &smi_si_stats_proc_ops,
99b76233 3395 new_smi);
1da177e4 3396 if (rv) {
279fbd0c 3397 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
1da177e4
LT		 3398 goto out_err_stop_timer;
3399 }
3400
b361e27b 3401 rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
07412736 3402 &smi_params_proc_ops,
99b76233 3403 new_smi);
b361e27b 3404 if (rv) {
279fbd0c 3405 dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
b361e27b
CM		 3406 goto out_err_stop_timer;
3407 }
3408
279fbd0c
MS		 3409 dev_info(new_smi->dev, "IPMI %s interface initialized\n",
3410 si_to_str[new_smi->si_type]);
1da177e4
LT		 3411
3412 return 0;
3413
3414 out_err_stop_timer:
a9a2c44f
CM		 3415 atomic_inc(&new_smi->stop_operation);
3416 wait_for_timer_and_thread(new_smi);
1da177e4
LT		 3417
3418 out_err:
2407d77a
MG		 3419 new_smi->interrupt_disabled = 1;
3420
3421 if (new_smi->intf) {
1da177e4 3422 ipmi_unregister_smi(new_smi->intf);
2407d77a
MG		 3423 new_smi->intf = NULL;
3424 }
1da177e4 3425
2407d77a 3426 if (new_smi->irq_cleanup) {
b0defcdb 3427 new_smi->irq_cleanup(new_smi);
2407d77a
MG		 3428 new_smi->irq_cleanup = NULL;
3429 }
1da177e4 3430
c305e3d3
CM		 3431 /*
3432 * Wait until we know that we are out of any interrupt
3433 * handlers might have been running before we freed the
3434 * interrupt.
3435 */
fbd568a3 3436 synchronize_sched();
1da177e4
LT		 3437
3438 if (new_smi->si_sm) {
3439 if (new_smi->handlers)
3440 new_smi->handlers->cleanup(new_smi->si_sm);
3441 kfree(new_smi->si_sm);
2407d77a 3442 new_smi->si_sm = NULL;
1da177e4 3443 }
2407d77a 3444 if (new_smi->addr_source_cleanup) {
b0defcdb 3445 new_smi->addr_source_cleanup(new_smi);
2407d77a
MG		 3446 new_smi->addr_source_cleanup = NULL;
3447 }
3448 if (new_smi->io_cleanup) {
7767e126 3449 new_smi->io_cleanup(new_smi);
2407d77a
MG		 3450 new_smi->io_cleanup = NULL;
3451 }
1da177e4 3452
2407d77a 3453 if (new_smi->dev_registered) {
50c812b2 3454 platform_device_unregister(new_smi->pdev);
2407d77a
MG		 3455 new_smi->dev_registered = 0;
3456 }
b0defcdb 3457
1da177e4
LT		 3458 return rv;
3459}
3460
2223cbec 3461static int init_ipmi_si(void)
1da177e4 3462{
1da177e4
LT		 3463 int i;
3464 char *str;
50c812b2 3465 int rv;
2407d77a 3466 struct smi_info *e;
06ee4594 3467 enum ipmi_addr_src type = SI_INVALID;
1da177e4
LT		 3468
3469 if (initialized)
3470 return 0;
3471 initialized = 1;
3472
f2afae46
CM		 3473 if (si_tryplatform) {
3474 rv = platform_driver_register(&ipmi_driver);
3475 if (rv) {
3476 printk(KERN_ERR PFX "Unable to register "
3477 "driver: %d\n", rv);
3478 return rv;
3479 }
50c812b2
CM		 3480 }
3481
1da177e4
LT		 3482 /* Parse out the si_type string into its components. */
3483 str = si_type_str;
3484 if (*str != '\0') {
e8b33617 3485 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
1da177e4
LT		 3486 si_type[i] = str;
3487 str = strchr(str, ',');
3488 if (str) {
3489 *str = '\0';
3490 str++;
3491 } else {
3492 break;
3493 }
3494 }
3495 }
3496
1fdd75bd 3497 printk(KERN_INFO "IPMI System Interface driver.\n");
1da177e4 3498
d8cc5267 3499 /* If the user gave us a device, they presumably want us to use it */
a1e9c9dd 3500 if (!hardcode_find_bmc())
d8cc5267 3501 return 0;
d8cc5267 3502
b0defcdb 3503#ifdef CONFIG_PCI
f2afae46
CM		 3504 if (si_trypci) {
3505 rv = pci_register_driver(&ipmi_pci_driver);
3506 if (rv)
3507 printk(KERN_ERR PFX "Unable to register "
3508 "PCI driver: %d\n", rv);
3509 else
3510 pci_registered = 1;
3511 }
b0defcdb
CM		 3512#endif
3513
754d4531 3514#ifdef CONFIG_ACPI
d941aeae
CM		 3515 if (si_tryacpi) {
3516 pnp_register_driver(&ipmi_pnp_driver);
3517 pnp_registered = 1;
3518 }
754d4531
MG		 3519#endif
3520
3521#ifdef CONFIG_DMI
d941aeae
CM		 3522 if (si_trydmi)
3523 dmi_find_bmc();
754d4531
MG		 3524#endif
3525
3526#ifdef CONFIG_ACPI
d941aeae
CM		 3527 if (si_tryacpi)
3528 spmi_find_bmc();
754d4531
MG		 3529#endif
3530
fdbeb7de
TB		 3531#ifdef CONFIG_PARISC
3532 register_parisc_driver(&ipmi_parisc_driver);
3533 parisc_registered = 1;
3534 /* poking PC IO addresses will crash machine, don't do it */
3535 si_trydefaults = 0;
3536#endif
3537
06ee4594
MG		 3538 /* We prefer devices with interrupts, but in the case of a machine
3539 with multiple BMCs we assume that there will be several instances
3540 of a given type so if we succeed in registering a type then also
3541 try to register everything else of the same type */
d8cc5267 3542
2407d77a
MG		 3543 mutex_lock(&smi_infos_lock);
3544 list_for_each_entry(e, &smi_infos, link) {
06ee4594
MG		 3545 /* Try to register a device if it has an IRQ and we either
3546 haven't successfully registered a device yet or this
3547 device has the same type as one we successfully registered */
3548 if (e->irq && (!type || e->addr_source == type)) {
d8cc5267 3549 if (!try_smi_init(e)) {
06ee4594 3550 type = e->addr_source;
d8cc5267
MG		 3551 }
3552 }
3553 }
3554
06ee4594
MG		 3555 /* type will only have been set if we successfully registered an si */
3556 if (type) {
3557 mutex_unlock(&smi_infos_lock);
3558 return 0;
3559 }
3560
d8cc5267
MG		 3561 /* Fall back to the preferred device */
3562
3563 list_for_each_entry(e, &smi_infos, link) {
06ee4594 3564 if (!e->irq && (!type || e->addr_source == type)) {
d8cc5267 3565 if (!try_smi_init(e)) {
06ee4594 3566 type = e->addr_source;
d8cc5267
MG		 3567 }
3568 }
2407d77a
MG		 3569 }
3570 mutex_unlock(&smi_infos_lock);
3571
06ee4594
MG		 3572 if (type)
3573 return 0;
3574
b0defcdb 3575 if (si_trydefaults) {
d6dfd131 3576 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 3577 if (list_empty(&smi_infos)) {
3578 /* No BMC was found, try defaults. */
d6dfd131 3579 mutex_unlock(&smi_infos_lock);
b0defcdb 3580 default_find_bmc();
2407d77a 3581 } else
d6dfd131 3582 mutex_unlock(&smi_infos_lock);
1da177e4
LT		 3583 }
3584
d6dfd131 3585 mutex_lock(&smi_infos_lock);
b361e27b 3586 if (unload_when_empty && list_empty(&smi_infos)) {
d6dfd131 3587 mutex_unlock(&smi_infos_lock);
d2478521 3588 cleanup_ipmi_si();
279fbd0c
MS		 3589 printk(KERN_WARNING PFX
3590 "Unable to find any System Interface(s)\n");
1da177e4 3591 return -ENODEV;
b0defcdb 3592 } else {
d6dfd131 3593 mutex_unlock(&smi_infos_lock);
b0defcdb 3594 return 0;
1da177e4 3595 }
1da177e4
LT		 3596}
3597module_init(init_ipmi_si);
3598
b361e27b 3599static void cleanup_one_si(struct smi_info *to_clean)
1da177e4 3600{
2407d77a 3601 int rv = 0;
1da177e4
LT		 3602 unsigned long flags;
3603
b0defcdb 3604 if (!to_clean)
1da177e4
LT		 3605 return;
3606
b0defcdb
CM		 3607 list_del(&to_clean->link);
3608
ee6cd5f8 3609 /* Tell the driver that we are shutting down. */
a9a2c44f 3610 atomic_inc(&to_clean->stop_operation);
b0defcdb 3611
c305e3d3
CM		 3612 /*
3613 * Make sure the timer and thread are stopped and will not run
3614 * again.
3615 */
a9a2c44f 3616 wait_for_timer_and_thread(to_clean);
1da177e4 3617
c305e3d3
CM		 3618 /*
3619 * Timeouts are stopped, now make sure the interrupts are off
3620 * for the device. A little tricky with locks to make sure
3621 * there are no races.
3622 */
ee6cd5f8
CM		 3623 spin_lock_irqsave(&to_clean->si_lock, flags);
3624 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3625 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3626 poll(to_clean);
3627 schedule_timeout_uninterruptible(1);
3628 spin_lock_irqsave(&to_clean->si_lock, flags);
3629 }
3630 disable_si_irq(to_clean);
3631 spin_unlock_irqrestore(&to_clean->si_lock, flags);
3632 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
3633 poll(to_clean);
3634 schedule_timeout_uninterruptible(1);
3635 }
3636
3637 /* Clean up interrupts and make sure that everything is done. */
3638 if (to_clean->irq_cleanup)
3639 to_clean->irq_cleanup(to_clean);
e8b33617 3640 while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
1da177e4 3641 poll(to_clean);
da4cd8df 3642 schedule_timeout_uninterruptible(1);
1da177e4
LT		 3643 }
3644
2407d77a
MG		 3645 if (to_clean->intf)
3646 rv = ipmi_unregister_smi(to_clean->intf);
3647
1da177e4 3648 if (rv) {
279fbd0c 3649 printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n",
1da177e4
LT		 3650 rv);
3651 }
3652
2407d77a
MG		 3653 if (to_clean->handlers)
3654 to_clean->handlers->cleanup(to_clean->si_sm);
1da177e4
LT		 3655
3656 kfree(to_clean->si_sm);
3657
b0defcdb
CM		 3658 if (to_clean->addr_source_cleanup)
3659 to_clean->addr_source_cleanup(to_clean);
7767e126
PG		 3660 if (to_clean->io_cleanup)
3661 to_clean->io_cleanup(to_clean);
50c812b2
CM		 3662
3663 if (to_clean->dev_registered)
3664 platform_device_unregister(to_clean->pdev);
3665
3666 kfree(to_clean);
1da177e4
LT		 3667}
3668
0dcf334c 3669static void cleanup_ipmi_si(void)
1da177e4 3670{
b0defcdb 3671 struct smi_info *e, *tmp_e;
1da177e4 3672
b0defcdb 3673 if (!initialized)
1da177e4
LT		 3674 return;
3675
b0defcdb 3676#ifdef CONFIG_PCI
56480287
MG		 3677 if (pci_registered)
3678 pci_unregister_driver(&ipmi_pci_driver);
b0defcdb 3679#endif
27d0567a 3680#ifdef CONFIG_ACPI
561f8182
YL		 3681 if (pnp_registered)
3682 pnp_unregister_driver(&ipmi_pnp_driver);
9e368fa0 3683#endif
fdbeb7de
TB		 3684#ifdef CONFIG_PARISC
3685 if (parisc_registered)
3686 unregister_parisc_driver(&ipmi_parisc_driver);
3687#endif
b0defcdb 3688
a1e9c9dd 3689 platform_driver_unregister(&ipmi_driver);
dba9b4f6 3690
d6dfd131 3691 mutex_lock(&smi_infos_lock);
b0defcdb
CM		 3692 list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
3693 cleanup_one_si(e);
d6dfd131 3694 mutex_unlock(&smi_infos_lock);
1da177e4
LT		 3695}
3696module_exit(cleanup_ipmi_si);
3697
3698MODULE_LICENSE("GPL");
1fdd75bd 3699MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
c305e3d3
CM		 3700MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
3701 " system interfaces.");
Linux 6.x block layer and io_uring tree(s)