Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * ipmi_si.c | |
3 | * | |
4 | * The interface to the IPMI driver for the system interfaces (KCS, SMIC, | |
5 | * BT). | |
6 | * | |
7 | * Author: MontaVista Software, Inc. | |
8 | * Corey Minyard <minyard@mvista.com> | |
9 | * source@mvista.com | |
10 | * | |
11 | * Copyright 2002 MontaVista Software Inc. | |
dba9b4f6 | 12 | * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com> |
1da177e4 LT |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify it | |
15 | * under the terms of the GNU General Public License as published by the | |
16 | * Free Software Foundation; either version 2 of the License, or (at your | |
17 | * option) any later version. | |
18 | * | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
21 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
22 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
25 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
26 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
27 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
28 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
29 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License along | |
32 | * with this program; if not, write to the Free Software Foundation, Inc., | |
33 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * This file holds the "policy" for the interface to the SMI state | |
38 | * machine. It does the configuration, handles timers and interrupts, | |
39 | * and drives the real SMI state machine. | |
40 | */ | |
41 | ||
1da177e4 LT |
42 | #include <linux/module.h> |
43 | #include <linux/moduleparam.h> | |
44 | #include <asm/system.h> | |
45 | #include <linux/sched.h> | |
46 | #include <linux/timer.h> | |
47 | #include <linux/errno.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/ioport.h> | |
ea94027b | 54 | #include <linux/notifier.h> |
b0defcdb | 55 | #include <linux/mutex.h> |
e9a705a0 | 56 | #include <linux/kthread.h> |
1da177e4 | 57 | #include <asm/irq.h> |
1da177e4 LT |
58 | #include <linux/interrupt.h> |
59 | #include <linux/rcupdate.h> | |
60 | #include <linux/ipmi_smi.h> | |
61 | #include <asm/io.h> | |
62 | #include "ipmi_si_sm.h" | |
63 | #include <linux/init.h> | |
b224cd3a | 64 | #include <linux/dmi.h> |
b361e27b CM |
65 | #include <linux/string.h> |
66 | #include <linux/ctype.h> | |
67 | ||
dba9b4f6 | 68 | #ifdef CONFIG_PPC_OF |
11c675ce SR |
69 | #include <linux/of_device.h> |
70 | #include <linux/of_platform.h> | |
dba9b4f6 CM |
71 | #endif |
72 | ||
b361e27b | 73 | #define PFX "ipmi_si: " |
1da177e4 LT |
74 | |
75 | /* Measure times between events in the driver. */ | |
76 | #undef DEBUG_TIMING | |
77 | ||
78 | /* Call every 10 ms. */ | |
79 | #define SI_TIMEOUT_TIME_USEC 10000 | |
80 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
81 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
82 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
c305e3d3 | 83 | short timeout */ |
1da177e4 | 84 | |
ee6cd5f8 CM |
85 | /* Bit for BMC global enables. */ |
86 | #define IPMI_BMC_RCV_MSG_INTR 0x01 | |
87 | #define IPMI_BMC_EVT_MSG_INTR 0x02 | |
88 | #define IPMI_BMC_EVT_MSG_BUFF 0x04 | |
89 | #define IPMI_BMC_SYS_LOG 0x08 | |
90 | ||
1da177e4 LT |
91 | enum 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 |
110 | enum si_type { |
111 | SI_KCS, SI_SMIC, SI_BT | |
112 | }; | |
b361e27b | 113 | static char *si_to_str[] = { "kcs", "smic", "bt" }; |
1da177e4 | 114 | |
50c812b2 CM |
115 | #define DEVICE_NAME "ipmi_si" |
116 | ||
c305e3d3 | 117 | static struct device_driver ipmi_driver = { |
50c812b2 CM |
118 | .name = DEVICE_NAME, |
119 | .bus = &platform_bus_type | |
120 | }; | |
3ae0e0f9 | 121 | |
64959e2d CM |
122 | |
123 | /* | |
124 | * Indexes into stats[] in smi_info below. | |
125 | */ | |
ba8ff1c6 CM |
126 | enum 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 | ||
163 | /* Number of asyncronous messages received. */ | |
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 | 171 | struct 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; | |
178 | spinlock_t msg_lock; | |
179 | struct list_head xmit_msgs; | |
180 | struct list_head hp_xmit_msgs; | |
181 | struct ipmi_smi_msg *curr_msg; | |
182 | enum si_intf_state si_state; | |
183 | ||
c305e3d3 CM |
184 | /* |
185 | * Used to handle the various types of I/O that can occur with | |
186 | * IPMI | |
187 | */ | |
1da177e4 LT |
188 | struct si_sm_io io; |
189 | int (*io_setup)(struct smi_info *info); | |
190 | void (*io_cleanup)(struct smi_info *info); | |
191 | int (*irq_setup)(struct smi_info *info); | |
192 | void (*irq_cleanup)(struct smi_info *info); | |
193 | unsigned int io_size; | |
b0defcdb CM |
194 | char *addr_source; /* ACPI, PCI, SMBIOS, hardcode, default. */ |
195 | void (*addr_source_cleanup)(struct smi_info *info); | |
196 | void *addr_source_data; | |
1da177e4 | 197 | |
c305e3d3 CM |
198 | /* |
199 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
200 | * when handle_flags() needs to be re-run or 0 indicating it | |
201 | * set si_state itself. | |
202 | */ | |
3ae0e0f9 CM |
203 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
204 | ||
c305e3d3 CM |
205 | /* |
206 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
207 | * is set to hold the flags until we are done handling everything | |
208 | * from the flags. | |
209 | */ | |
1da177e4 LT |
210 | #define RECEIVE_MSG_AVAIL 0x01 |
211 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
212 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
213 | #define OEM0_DATA_AVAIL 0x20 |
214 | #define OEM1_DATA_AVAIL 0x40 | |
215 | #define OEM2_DATA_AVAIL 0x80 | |
216 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
217 | OEM1_DATA_AVAIL | \ |
218 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
219 | unsigned char msg_flags; |
220 | ||
c305e3d3 CM |
221 | /* |
222 | * If set to true, this will request events the next time the | |
223 | * state machine is idle. | |
224 | */ | |
1da177e4 LT |
225 | atomic_t req_events; |
226 | ||
c305e3d3 CM |
227 | /* |
228 | * If true, run the state machine to completion on every send | |
229 | * call. Generally used after a panic to make sure stuff goes | |
230 | * out. | |
231 | */ | |
1da177e4 LT |
232 | int run_to_completion; |
233 | ||
234 | /* The I/O port of an SI interface. */ | |
235 | int port; | |
236 | ||
c305e3d3 CM |
237 | /* |
238 | * The space between start addresses of the two ports. For | |
239 | * instance, if the first port is 0xca2 and the spacing is 4, then | |
240 | * the second port is 0xca6. | |
241 | */ | |
1da177e4 LT |
242 | unsigned int spacing; |
243 | ||
244 | /* zero if no irq; */ | |
245 | int irq; | |
246 | ||
247 | /* The timer for this si. */ | |
248 | struct timer_list si_timer; | |
249 | ||
250 | /* The time (in jiffies) the last timeout occurred at. */ | |
251 | unsigned long last_timeout_jiffies; | |
252 | ||
253 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 254 | atomic_t stop_operation; |
1da177e4 | 255 | |
c305e3d3 CM |
256 | /* |
257 | * The driver will disable interrupts when it gets into a | |
258 | * situation where it cannot handle messages due to lack of | |
259 | * memory. Once that situation clears up, it will re-enable | |
260 | * interrupts. | |
261 | */ | |
1da177e4 LT |
262 | int interrupt_disabled; |
263 | ||
50c812b2 | 264 | /* From the get device id response... */ |
3ae0e0f9 | 265 | struct ipmi_device_id device_id; |
1da177e4 | 266 | |
50c812b2 CM |
267 | /* Driver model stuff. */ |
268 | struct device *dev; | |
269 | struct platform_device *pdev; | |
270 | ||
c305e3d3 CM |
271 | /* |
272 | * True if we allocated the device, false if it came from | |
273 | * someplace else (like PCI). | |
274 | */ | |
50c812b2 CM |
275 | int dev_registered; |
276 | ||
1da177e4 LT |
277 | /* Slave address, could be reported from DMI. */ |
278 | unsigned char slave_addr; | |
279 | ||
280 | /* Counters and things for the proc filesystem. */ | |
64959e2d | 281 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 282 | |
c305e3d3 | 283 | struct task_struct *thread; |
b0defcdb CM |
284 | |
285 | struct list_head link; | |
1da177e4 LT |
286 | }; |
287 | ||
64959e2d CM |
288 | #define smi_inc_stat(smi, stat) \ |
289 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
290 | #define smi_get_stat(smi, stat) \ | |
291 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
292 | ||
a51f4a81 CM |
293 | #define SI_MAX_PARMS 4 |
294 | ||
295 | static int force_kipmid[SI_MAX_PARMS]; | |
296 | static int num_force_kipmid; | |
297 | ||
b361e27b CM |
298 | static int unload_when_empty = 1; |
299 | ||
b0defcdb | 300 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 301 | static void cleanup_one_si(struct smi_info *to_clean); |
b0defcdb | 302 | |
e041c683 | 303 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 304 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 305 | { |
e041c683 | 306 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
307 | } |
308 | ||
1da177e4 LT |
309 | static void deliver_recv_msg(struct smi_info *smi_info, |
310 | struct ipmi_smi_msg *msg) | |
311 | { | |
312 | /* Deliver the message to the upper layer with the lock | |
c305e3d3 | 313 | released. */ |
1da177e4 LT |
314 | spin_unlock(&(smi_info->si_lock)); |
315 | ipmi_smi_msg_received(smi_info->intf, msg); | |
316 | spin_lock(&(smi_info->si_lock)); | |
317 | } | |
318 | ||
4d7cbac7 | 319 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
320 | { |
321 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
322 | ||
4d7cbac7 CM |
323 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
324 | cCode = IPMI_ERR_UNSPECIFIED; | |
325 | /* else use it as is */ | |
326 | ||
1da177e4 LT |
327 | /* Make it a reponse */ |
328 | msg->rsp[0] = msg->data[0] | 4; | |
329 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 330 | msg->rsp[2] = cCode; |
1da177e4 LT |
331 | msg->rsp_size = 3; |
332 | ||
333 | smi_info->curr_msg = NULL; | |
334 | deliver_recv_msg(smi_info, msg); | |
335 | } | |
336 | ||
337 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
338 | { | |
339 | int rv; | |
340 | struct list_head *entry = NULL; | |
341 | #ifdef DEBUG_TIMING | |
342 | struct timeval t; | |
343 | #endif | |
344 | ||
c305e3d3 CM |
345 | /* |
346 | * No need to save flags, we aleady have interrupts off and we | |
347 | * already hold the SMI lock. | |
348 | */ | |
5956dce1 KB |
349 | if (!smi_info->run_to_completion) |
350 | spin_lock(&(smi_info->msg_lock)); | |
1da177e4 LT |
351 | |
352 | /* Pick the high priority queue first. */ | |
b0defcdb | 353 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 354 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 355 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
356 | entry = smi_info->xmit_msgs.next; |
357 | } | |
358 | ||
b0defcdb | 359 | if (!entry) { |
1da177e4 LT |
360 | smi_info->curr_msg = NULL; |
361 | rv = SI_SM_IDLE; | |
362 | } else { | |
363 | int err; | |
364 | ||
365 | list_del(entry); | |
366 | smi_info->curr_msg = list_entry(entry, | |
367 | struct ipmi_smi_msg, | |
368 | link); | |
369 | #ifdef DEBUG_TIMING | |
370 | do_gettimeofday(&t); | |
c305e3d3 | 371 | printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 | 372 | #endif |
e041c683 AS |
373 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
374 | 0, smi_info); | |
ea94027b CM |
375 | if (err & NOTIFY_STOP_MASK) { |
376 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
377 | goto out; | |
378 | } | |
1da177e4 LT |
379 | err = smi_info->handlers->start_transaction( |
380 | smi_info->si_sm, | |
381 | smi_info->curr_msg->data, | |
382 | smi_info->curr_msg->data_size); | |
c305e3d3 | 383 | if (err) |
4d7cbac7 | 384 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
385 | |
386 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
387 | } | |
c305e3d3 | 388 | out: |
5956dce1 KB |
389 | if (!smi_info->run_to_completion) |
390 | spin_unlock(&(smi_info->msg_lock)); | |
1da177e4 LT |
391 | |
392 | return rv; | |
393 | } | |
394 | ||
395 | static void start_enable_irq(struct smi_info *smi_info) | |
396 | { | |
397 | unsigned char msg[2]; | |
398 | ||
c305e3d3 CM |
399 | /* |
400 | * If we are enabling interrupts, we have to tell the | |
401 | * BMC to use them. | |
402 | */ | |
1da177e4 LT |
403 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
404 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
405 | ||
406 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
407 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
408 | } | |
409 | ||
ee6cd5f8 CM |
410 | static void start_disable_irq(struct smi_info *smi_info) |
411 | { | |
412 | unsigned char msg[2]; | |
413 | ||
414 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
415 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
416 | ||
417 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
418 | smi_info->si_state = SI_DISABLE_INTERRUPTS1; | |
419 | } | |
420 | ||
1da177e4 LT |
421 | static void start_clear_flags(struct smi_info *smi_info) |
422 | { | |
423 | unsigned char msg[3]; | |
424 | ||
425 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
426 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
427 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
428 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
429 | ||
430 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
431 | smi_info->si_state = SI_CLEARING_FLAGS; | |
432 | } | |
433 | ||
c305e3d3 CM |
434 | /* |
435 | * When we have a situtaion where we run out of memory and cannot | |
436 | * allocate messages, we just leave them in the BMC and run the system | |
437 | * polled until we can allocate some memory. Once we have some | |
438 | * memory, we will re-enable the interrupt. | |
439 | */ | |
1da177e4 LT |
440 | static inline void disable_si_irq(struct smi_info *smi_info) |
441 | { | |
b0defcdb | 442 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
ee6cd5f8 | 443 | start_disable_irq(smi_info); |
1da177e4 LT |
444 | smi_info->interrupt_disabled = 1; |
445 | } | |
446 | } | |
447 | ||
448 | static inline void enable_si_irq(struct smi_info *smi_info) | |
449 | { | |
450 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
ee6cd5f8 | 451 | start_enable_irq(smi_info); |
1da177e4 LT |
452 | smi_info->interrupt_disabled = 0; |
453 | } | |
454 | } | |
455 | ||
456 | static void handle_flags(struct smi_info *smi_info) | |
457 | { | |
3ae0e0f9 | 458 | retry: |
1da177e4 LT |
459 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
460 | /* Watchdog pre-timeout */ | |
64959e2d | 461 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 LT |
462 | |
463 | start_clear_flags(smi_info); | |
464 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
465 | spin_unlock(&(smi_info->si_lock)); | |
466 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
467 | spin_lock(&(smi_info->si_lock)); | |
468 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { | |
469 | /* Messages available. */ | |
470 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 471 | if (!smi_info->curr_msg) { |
1da177e4 LT |
472 | disable_si_irq(smi_info); |
473 | smi_info->si_state = SI_NORMAL; | |
474 | return; | |
475 | } | |
476 | enable_si_irq(smi_info); | |
477 | ||
478 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
479 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
480 | smi_info->curr_msg->data_size = 2; | |
481 | ||
482 | smi_info->handlers->start_transaction( | |
483 | smi_info->si_sm, | |
484 | smi_info->curr_msg->data, | |
485 | smi_info->curr_msg->data_size); | |
486 | smi_info->si_state = SI_GETTING_MESSAGES; | |
487 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
488 | /* Events available. */ | |
489 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 490 | if (!smi_info->curr_msg) { |
1da177e4 LT |
491 | disable_si_irq(smi_info); |
492 | smi_info->si_state = SI_NORMAL; | |
493 | return; | |
494 | } | |
495 | enable_si_irq(smi_info); | |
496 | ||
497 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
498 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
499 | smi_info->curr_msg->data_size = 2; | |
500 | ||
501 | smi_info->handlers->start_transaction( | |
502 | smi_info->si_sm, | |
503 | smi_info->curr_msg->data, | |
504 | smi_info->curr_msg->data_size); | |
505 | smi_info->si_state = SI_GETTING_EVENTS; | |
4064d5ef | 506 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 507 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
508 | if (smi_info->oem_data_avail_handler(smi_info)) |
509 | goto retry; | |
c305e3d3 | 510 | } else |
1da177e4 | 511 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
512 | } |
513 | ||
514 | static void handle_transaction_done(struct smi_info *smi_info) | |
515 | { | |
516 | struct ipmi_smi_msg *msg; | |
517 | #ifdef DEBUG_TIMING | |
518 | struct timeval t; | |
519 | ||
520 | do_gettimeofday(&t); | |
c305e3d3 | 521 | printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
522 | #endif |
523 | switch (smi_info->si_state) { | |
524 | case SI_NORMAL: | |
b0defcdb | 525 | if (!smi_info->curr_msg) |
1da177e4 LT |
526 | break; |
527 | ||
528 | smi_info->curr_msg->rsp_size | |
529 | = smi_info->handlers->get_result( | |
530 | smi_info->si_sm, | |
531 | smi_info->curr_msg->rsp, | |
532 | IPMI_MAX_MSG_LENGTH); | |
533 | ||
c305e3d3 CM |
534 | /* |
535 | * Do this here becase deliver_recv_msg() releases the | |
536 | * lock, and a new message can be put in during the | |
537 | * time the lock is released. | |
538 | */ | |
1da177e4 LT |
539 | msg = smi_info->curr_msg; |
540 | smi_info->curr_msg = NULL; | |
541 | deliver_recv_msg(smi_info, msg); | |
542 | break; | |
543 | ||
544 | case SI_GETTING_FLAGS: | |
545 | { | |
546 | unsigned char msg[4]; | |
547 | unsigned int len; | |
548 | ||
549 | /* We got the flags from the SMI, now handle them. */ | |
550 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
551 | if (msg[2] != 0) { | |
c305e3d3 | 552 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
553 | smi_info->si_state = SI_NORMAL; |
554 | } else if (len < 4) { | |
c305e3d3 CM |
555 | /* |
556 | * Hmm, no flags. That's technically illegal, but | |
557 | * don't use uninitialized data. | |
558 | */ | |
1da177e4 LT |
559 | smi_info->si_state = SI_NORMAL; |
560 | } else { | |
561 | smi_info->msg_flags = msg[3]; | |
562 | handle_flags(smi_info); | |
563 | } | |
564 | break; | |
565 | } | |
566 | ||
567 | case SI_CLEARING_FLAGS: | |
568 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
569 | { | |
570 | unsigned char msg[3]; | |
571 | ||
572 | /* We cleared the flags. */ | |
573 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
574 | if (msg[2] != 0) { | |
575 | /* Error clearing flags */ | |
576 | printk(KERN_WARNING | |
577 | "ipmi_si: Error clearing flags: %2.2x\n", | |
578 | msg[2]); | |
579 | } | |
580 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
581 | start_enable_irq(smi_info); | |
582 | else | |
583 | smi_info->si_state = SI_NORMAL; | |
584 | break; | |
585 | } | |
586 | ||
587 | case SI_GETTING_EVENTS: | |
588 | { | |
589 | smi_info->curr_msg->rsp_size | |
590 | = smi_info->handlers->get_result( | |
591 | smi_info->si_sm, | |
592 | smi_info->curr_msg->rsp, | |
593 | IPMI_MAX_MSG_LENGTH); | |
594 | ||
c305e3d3 CM |
595 | /* |
596 | * Do this here becase deliver_recv_msg() releases the | |
597 | * lock, and a new message can be put in during the | |
598 | * time the lock is released. | |
599 | */ | |
1da177e4 LT |
600 | msg = smi_info->curr_msg; |
601 | smi_info->curr_msg = NULL; | |
602 | if (msg->rsp[2] != 0) { | |
603 | /* Error getting event, probably done. */ | |
604 | msg->done(msg); | |
605 | ||
606 | /* Take off the event flag. */ | |
607 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
608 | handle_flags(smi_info); | |
609 | } else { | |
64959e2d | 610 | smi_inc_stat(smi_info, events); |
1da177e4 | 611 | |
c305e3d3 CM |
612 | /* |
613 | * Do this before we deliver the message | |
614 | * because delivering the message releases the | |
615 | * lock and something else can mess with the | |
616 | * state. | |
617 | */ | |
1da177e4 LT |
618 | handle_flags(smi_info); |
619 | ||
620 | deliver_recv_msg(smi_info, msg); | |
621 | } | |
622 | break; | |
623 | } | |
624 | ||
625 | case SI_GETTING_MESSAGES: | |
626 | { | |
627 | smi_info->curr_msg->rsp_size | |
628 | = smi_info->handlers->get_result( | |
629 | smi_info->si_sm, | |
630 | smi_info->curr_msg->rsp, | |
631 | IPMI_MAX_MSG_LENGTH); | |
632 | ||
c305e3d3 CM |
633 | /* |
634 | * Do this here becase deliver_recv_msg() releases the | |
635 | * lock, and a new message can be put in during the | |
636 | * time the lock is released. | |
637 | */ | |
1da177e4 LT |
638 | msg = smi_info->curr_msg; |
639 | smi_info->curr_msg = NULL; | |
640 | if (msg->rsp[2] != 0) { | |
641 | /* Error getting event, probably done. */ | |
642 | msg->done(msg); | |
643 | ||
644 | /* Take off the msg flag. */ | |
645 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
646 | handle_flags(smi_info); | |
647 | } else { | |
64959e2d | 648 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 649 | |
c305e3d3 CM |
650 | /* |
651 | * Do this before we deliver the message | |
652 | * because delivering the message releases the | |
653 | * lock and something else can mess with the | |
654 | * state. | |
655 | */ | |
1da177e4 LT |
656 | handle_flags(smi_info); |
657 | ||
658 | deliver_recv_msg(smi_info, msg); | |
659 | } | |
660 | break; | |
661 | } | |
662 | ||
663 | case SI_ENABLE_INTERRUPTS1: | |
664 | { | |
665 | unsigned char msg[4]; | |
666 | ||
667 | /* We got the flags from the SMI, now handle them. */ | |
668 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
669 | if (msg[2] != 0) { | |
670 | printk(KERN_WARNING | |
671 | "ipmi_si: Could not enable interrupts" | |
672 | ", failed get, using polled mode.\n"); | |
673 | smi_info->si_state = SI_NORMAL; | |
674 | } else { | |
675 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
676 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
ee6cd5f8 CM |
677 | msg[2] = (msg[3] | |
678 | IPMI_BMC_RCV_MSG_INTR | | |
679 | IPMI_BMC_EVT_MSG_INTR); | |
1da177e4 LT |
680 | smi_info->handlers->start_transaction( |
681 | smi_info->si_sm, msg, 3); | |
682 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
683 | } | |
684 | break; | |
685 | } | |
686 | ||
687 | case SI_ENABLE_INTERRUPTS2: | |
688 | { | |
689 | unsigned char msg[4]; | |
690 | ||
691 | /* We got the flags from the SMI, now handle them. */ | |
692 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
693 | if (msg[2] != 0) { | |
694 | printk(KERN_WARNING | |
695 | "ipmi_si: Could not enable interrupts" | |
696 | ", failed set, using polled mode.\n"); | |
697 | } | |
698 | smi_info->si_state = SI_NORMAL; | |
699 | break; | |
700 | } | |
ee6cd5f8 CM |
701 | |
702 | case SI_DISABLE_INTERRUPTS1: | |
703 | { | |
704 | unsigned char msg[4]; | |
705 | ||
706 | /* We got the flags from the SMI, now handle them. */ | |
707 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
708 | if (msg[2] != 0) { | |
709 | printk(KERN_WARNING | |
710 | "ipmi_si: Could not disable interrupts" | |
711 | ", failed get.\n"); | |
712 | smi_info->si_state = SI_NORMAL; | |
713 | } else { | |
714 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
715 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
716 | msg[2] = (msg[3] & | |
717 | ~(IPMI_BMC_RCV_MSG_INTR | | |
718 | IPMI_BMC_EVT_MSG_INTR)); | |
719 | smi_info->handlers->start_transaction( | |
720 | smi_info->si_sm, msg, 3); | |
721 | smi_info->si_state = SI_DISABLE_INTERRUPTS2; | |
722 | } | |
723 | break; | |
724 | } | |
725 | ||
726 | case SI_DISABLE_INTERRUPTS2: | |
727 | { | |
728 | unsigned char msg[4]; | |
729 | ||
730 | /* We got the flags from the SMI, now handle them. */ | |
731 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
732 | if (msg[2] != 0) { | |
733 | printk(KERN_WARNING | |
734 | "ipmi_si: Could not disable interrupts" | |
735 | ", failed set.\n"); | |
736 | } | |
737 | smi_info->si_state = SI_NORMAL; | |
738 | break; | |
739 | } | |
1da177e4 LT |
740 | } |
741 | } | |
742 | ||
c305e3d3 CM |
743 | /* |
744 | * Called on timeouts and events. Timeouts should pass the elapsed | |
745 | * time, interrupts should pass in zero. Must be called with | |
746 | * si_lock held and interrupts disabled. | |
747 | */ | |
1da177e4 LT |
748 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
749 | int time) | |
750 | { | |
751 | enum si_sm_result si_sm_result; | |
752 | ||
753 | restart: | |
c305e3d3 CM |
754 | /* |
755 | * There used to be a loop here that waited a little while | |
756 | * (around 25us) before giving up. That turned out to be | |
757 | * pointless, the minimum delays I was seeing were in the 300us | |
758 | * range, which is far too long to wait in an interrupt. So | |
759 | * we just run until the state machine tells us something | |
760 | * happened or it needs a delay. | |
761 | */ | |
1da177e4 LT |
762 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
763 | time = 0; | |
764 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 765 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 766 | |
c305e3d3 | 767 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 768 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
769 | |
770 | handle_transaction_done(smi_info); | |
771 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 772 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 773 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 774 | |
c305e3d3 CM |
775 | /* |
776 | * Do the before return_hosed_msg, because that | |
777 | * releases the lock. | |
778 | */ | |
1da177e4 LT |
779 | smi_info->si_state = SI_NORMAL; |
780 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
781 | /* |
782 | * If we were handling a user message, format | |
783 | * a response to send to the upper layer to | |
784 | * tell it about the error. | |
785 | */ | |
4d7cbac7 | 786 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
787 | } |
788 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
789 | } | |
790 | ||
4ea18425 CM |
791 | /* |
792 | * We prefer handling attn over new messages. But don't do | |
793 | * this if there is not yet an upper layer to handle anything. | |
794 | */ | |
c305e3d3 | 795 | if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) { |
1da177e4 LT |
796 | unsigned char msg[2]; |
797 | ||
64959e2d | 798 | smi_inc_stat(smi_info, attentions); |
1da177e4 | 799 | |
c305e3d3 CM |
800 | /* |
801 | * Got a attn, send down a get message flags to see | |
802 | * what's causing it. It would be better to handle | |
803 | * this in the upper layer, but due to the way | |
804 | * interrupts work with the SMI, that's not really | |
805 | * possible. | |
806 | */ | |
1da177e4 LT |
807 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
808 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
809 | ||
810 | smi_info->handlers->start_transaction( | |
811 | smi_info->si_sm, msg, 2); | |
812 | smi_info->si_state = SI_GETTING_FLAGS; | |
813 | goto restart; | |
814 | } | |
815 | ||
816 | /* If we are currently idle, try to start the next message. */ | |
817 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 818 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
819 | |
820 | si_sm_result = start_next_msg(smi_info); | |
821 | if (si_sm_result != SI_SM_IDLE) | |
822 | goto restart; | |
c305e3d3 | 823 | } |
1da177e4 LT |
824 | |
825 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
826 | && (atomic_read(&smi_info->req_events))) { |
827 | /* | |
828 | * We are idle and the upper layer requested that I fetch | |
829 | * events, so do so. | |
830 | */ | |
55162fb1 | 831 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 832 | |
55162fb1 CM |
833 | smi_info->curr_msg = ipmi_alloc_smi_msg(); |
834 | if (!smi_info->curr_msg) | |
835 | goto out; | |
1da177e4 | 836 | |
55162fb1 CM |
837 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
838 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
839 | smi_info->curr_msg->data_size = 2; | |
1da177e4 LT |
840 | |
841 | smi_info->handlers->start_transaction( | |
55162fb1 CM |
842 | smi_info->si_sm, |
843 | smi_info->curr_msg->data, | |
844 | smi_info->curr_msg->data_size); | |
845 | smi_info->si_state = SI_GETTING_EVENTS; | |
1da177e4 LT |
846 | goto restart; |
847 | } | |
55162fb1 | 848 | out: |
1da177e4 LT |
849 | return si_sm_result; |
850 | } | |
851 | ||
852 | static void sender(void *send_info, | |
853 | struct ipmi_smi_msg *msg, | |
854 | int priority) | |
855 | { | |
856 | struct smi_info *smi_info = send_info; | |
857 | enum si_sm_result result; | |
858 | unsigned long flags; | |
859 | #ifdef DEBUG_TIMING | |
860 | struct timeval t; | |
861 | #endif | |
862 | ||
b361e27b CM |
863 | if (atomic_read(&smi_info->stop_operation)) { |
864 | msg->rsp[0] = msg->data[0] | 4; | |
865 | msg->rsp[1] = msg->data[1]; | |
866 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
867 | msg->rsp_size = 3; | |
868 | deliver_recv_msg(smi_info, msg); | |
869 | return; | |
870 | } | |
871 | ||
1da177e4 LT |
872 | #ifdef DEBUG_TIMING |
873 | do_gettimeofday(&t); | |
874 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
875 | #endif | |
876 | ||
877 | if (smi_info->run_to_completion) { | |
bda4c30a CM |
878 | /* |
879 | * If we are running to completion, then throw it in | |
880 | * the list and run transactions until everything is | |
881 | * clear. Priority doesn't matter here. | |
882 | */ | |
883 | ||
884 | /* | |
885 | * Run to completion means we are single-threaded, no | |
886 | * need for locks. | |
887 | */ | |
1da177e4 LT |
888 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); |
889 | ||
1da177e4 LT |
890 | result = smi_event_handler(smi_info, 0); |
891 | while (result != SI_SM_IDLE) { | |
892 | udelay(SI_SHORT_TIMEOUT_USEC); | |
893 | result = smi_event_handler(smi_info, | |
894 | SI_SHORT_TIMEOUT_USEC); | |
895 | } | |
1da177e4 | 896 | return; |
1da177e4 | 897 | } |
1da177e4 | 898 | |
bda4c30a CM |
899 | spin_lock_irqsave(&smi_info->msg_lock, flags); |
900 | if (priority > 0) | |
901 | list_add_tail(&msg->link, &smi_info->hp_xmit_msgs); | |
902 | else | |
903 | list_add_tail(&msg->link, &smi_info->xmit_msgs); | |
904 | spin_unlock_irqrestore(&smi_info->msg_lock, flags); | |
905 | ||
906 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
c305e3d3 | 907 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) |
1da177e4 | 908 | start_next_msg(smi_info); |
bda4c30a | 909 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
910 | } |
911 | ||
912 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
913 | { | |
914 | struct smi_info *smi_info = send_info; | |
915 | enum si_sm_result result; | |
1da177e4 LT |
916 | |
917 | smi_info->run_to_completion = i_run_to_completion; | |
918 | if (i_run_to_completion) { | |
919 | result = smi_event_handler(smi_info, 0); | |
920 | while (result != SI_SM_IDLE) { | |
921 | udelay(SI_SHORT_TIMEOUT_USEC); | |
922 | result = smi_event_handler(smi_info, | |
923 | SI_SHORT_TIMEOUT_USEC); | |
924 | } | |
925 | } | |
1da177e4 LT |
926 | } |
927 | ||
a9a2c44f CM |
928 | static int ipmi_thread(void *data) |
929 | { | |
930 | struct smi_info *smi_info = data; | |
e9a705a0 | 931 | unsigned long flags; |
a9a2c44f CM |
932 | enum si_sm_result smi_result; |
933 | ||
a9a2c44f | 934 | set_user_nice(current, 19); |
e9a705a0 | 935 | while (!kthread_should_stop()) { |
a9a2c44f | 936 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 937 | smi_result = smi_event_handler(smi_info, 0); |
a9a2c44f | 938 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
c305e3d3 CM |
939 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
940 | ; /* do nothing */ | |
e9a705a0 | 941 | else if (smi_result == SI_SM_CALL_WITH_DELAY) |
33979734 | 942 | schedule(); |
e9a705a0 MD |
943 | else |
944 | schedule_timeout_interruptible(1); | |
a9a2c44f | 945 | } |
a9a2c44f CM |
946 | return 0; |
947 | } | |
948 | ||
949 | ||
1da177e4 LT |
950 | static void poll(void *send_info) |
951 | { | |
952 | struct smi_info *smi_info = send_info; | |
fcfa4724 | 953 | unsigned long flags; |
1da177e4 | 954 | |
15c62e10 CM |
955 | /* |
956 | * Make sure there is some delay in the poll loop so we can | |
957 | * drive time forward and timeout things. | |
958 | */ | |
959 | udelay(10); | |
fcfa4724 | 960 | spin_lock_irqsave(&smi_info->si_lock, flags); |
15c62e10 | 961 | smi_event_handler(smi_info, 10); |
fcfa4724 | 962 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
963 | } |
964 | ||
965 | static void request_events(void *send_info) | |
966 | { | |
967 | struct smi_info *smi_info = send_info; | |
968 | ||
b361e27b CM |
969 | if (atomic_read(&smi_info->stop_operation)) |
970 | return; | |
971 | ||
1da177e4 LT |
972 | atomic_set(&smi_info->req_events, 1); |
973 | } | |
974 | ||
0c8204b3 | 975 | static int initialized; |
1da177e4 | 976 | |
1da177e4 LT |
977 | static void smi_timeout(unsigned long data) |
978 | { | |
979 | struct smi_info *smi_info = (struct smi_info *) data; | |
980 | enum si_sm_result smi_result; | |
981 | unsigned long flags; | |
982 | unsigned long jiffies_now; | |
c4edff1c | 983 | long time_diff; |
1da177e4 LT |
984 | #ifdef DEBUG_TIMING |
985 | struct timeval t; | |
986 | #endif | |
987 | ||
1da177e4 LT |
988 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
989 | #ifdef DEBUG_TIMING | |
990 | do_gettimeofday(&t); | |
c305e3d3 | 991 | printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
992 | #endif |
993 | jiffies_now = jiffies; | |
c4edff1c | 994 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
995 | * SI_USEC_PER_JIFFY); |
996 | smi_result = smi_event_handler(smi_info, time_diff); | |
997 | ||
998 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
999 | ||
1000 | smi_info->last_timeout_jiffies = jiffies_now; | |
1001 | ||
b0defcdb | 1002 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 LT |
1003 | /* Running with interrupts, only do long timeouts. */ |
1004 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
64959e2d | 1005 | smi_inc_stat(smi_info, long_timeouts); |
1da177e4 LT |
1006 | goto do_add_timer; |
1007 | } | |
1008 | ||
c305e3d3 CM |
1009 | /* |
1010 | * If the state machine asks for a short delay, then shorten | |
1011 | * the timer timeout. | |
1012 | */ | |
1da177e4 | 1013 | if (smi_result == SI_SM_CALL_WITH_DELAY) { |
64959e2d | 1014 | smi_inc_stat(smi_info, short_timeouts); |
1da177e4 | 1015 | smi_info->si_timer.expires = jiffies + 1; |
1da177e4 | 1016 | } else { |
64959e2d | 1017 | smi_inc_stat(smi_info, long_timeouts); |
1da177e4 | 1018 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1019 | } |
1020 | ||
1021 | do_add_timer: | |
1022 | add_timer(&(smi_info->si_timer)); | |
1023 | } | |
1024 | ||
7d12e780 | 1025 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
1026 | { |
1027 | struct smi_info *smi_info = data; | |
1028 | unsigned long flags; | |
1029 | #ifdef DEBUG_TIMING | |
1030 | struct timeval t; | |
1031 | #endif | |
1032 | ||
1033 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1034 | ||
64959e2d | 1035 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1036 | |
1da177e4 LT |
1037 | #ifdef DEBUG_TIMING |
1038 | do_gettimeofday(&t); | |
c305e3d3 | 1039 | printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1040 | #endif |
1041 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1042 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1043 | return IRQ_HANDLED; | |
1044 | } | |
1045 | ||
7d12e780 | 1046 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
1047 | { |
1048 | struct smi_info *smi_info = data; | |
1049 | /* We need to clear the IRQ flag for the BT interface. */ | |
1050 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1051 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1052 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 1053 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
1054 | } |
1055 | ||
453823ba CM |
1056 | static int smi_start_processing(void *send_info, |
1057 | ipmi_smi_t intf) | |
1058 | { | |
1059 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1060 | int enable = 0; |
453823ba CM |
1061 | |
1062 | new_smi->intf = intf; | |
1063 | ||
c45adc39 CM |
1064 | /* Try to claim any interrupts. */ |
1065 | if (new_smi->irq_setup) | |
1066 | new_smi->irq_setup(new_smi); | |
1067 | ||
453823ba CM |
1068 | /* Set up the timer that drives the interface. */ |
1069 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
1070 | new_smi->last_timeout_jiffies = jiffies; | |
1071 | mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
1072 | ||
a51f4a81 CM |
1073 | /* |
1074 | * Check if the user forcefully enabled the daemon. | |
1075 | */ | |
1076 | if (new_smi->intf_num < num_force_kipmid) | |
1077 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1078 | /* |
1079 | * The BT interface is efficient enough to not need a thread, | |
1080 | * and there is no need for a thread if we have interrupts. | |
1081 | */ | |
c305e3d3 | 1082 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
a51f4a81 CM |
1083 | enable = 1; |
1084 | ||
1085 | if (enable) { | |
453823ba CM |
1086 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1087 | "kipmi%d", new_smi->intf_num); | |
1088 | if (IS_ERR(new_smi->thread)) { | |
1089 | printk(KERN_NOTICE "ipmi_si_intf: Could not start" | |
1090 | " kernel thread due to error %ld, only using" | |
1091 | " timers to drive the interface\n", | |
1092 | PTR_ERR(new_smi->thread)); | |
1093 | new_smi->thread = NULL; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | return 0; | |
1098 | } | |
9dbf68f9 | 1099 | |
b9675136 CM |
1100 | static void set_maintenance_mode(void *send_info, int enable) |
1101 | { | |
1102 | struct smi_info *smi_info = send_info; | |
1103 | ||
1104 | if (!enable) | |
1105 | atomic_set(&smi_info->req_events, 0); | |
1106 | } | |
1107 | ||
c305e3d3 | 1108 | static struct ipmi_smi_handlers handlers = { |
1da177e4 | 1109 | .owner = THIS_MODULE, |
453823ba | 1110 | .start_processing = smi_start_processing, |
1da177e4 LT |
1111 | .sender = sender, |
1112 | .request_events = request_events, | |
b9675136 | 1113 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
1114 | .set_run_to_completion = set_run_to_completion, |
1115 | .poll = poll, | |
1116 | }; | |
1117 | ||
c305e3d3 CM |
1118 | /* |
1119 | * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1120 | * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. | |
1121 | */ | |
1da177e4 | 1122 | |
b0defcdb | 1123 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1124 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1125 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1126 | |
1da177e4 | 1127 | #define DEFAULT_REGSPACING 1 |
dba9b4f6 | 1128 | #define DEFAULT_REGSIZE 1 |
1da177e4 LT |
1129 | |
1130 | static int si_trydefaults = 1; | |
1131 | static char *si_type[SI_MAX_PARMS]; | |
1132 | #define MAX_SI_TYPE_STR 30 | |
1133 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1134 | static unsigned long addrs[SI_MAX_PARMS]; | |
64a6f950 | 1135 | static unsigned int num_addrs; |
1da177e4 | 1136 | static unsigned int ports[SI_MAX_PARMS]; |
64a6f950 | 1137 | static unsigned int num_ports; |
1da177e4 | 1138 | static int irqs[SI_MAX_PARMS]; |
64a6f950 | 1139 | static unsigned int num_irqs; |
1da177e4 | 1140 | static int regspacings[SI_MAX_PARMS]; |
64a6f950 | 1141 | static unsigned int num_regspacings; |
1da177e4 | 1142 | static int regsizes[SI_MAX_PARMS]; |
64a6f950 | 1143 | static unsigned int num_regsizes; |
1da177e4 | 1144 | static int regshifts[SI_MAX_PARMS]; |
64a6f950 | 1145 | static unsigned int num_regshifts; |
1da177e4 | 1146 | static int slave_addrs[SI_MAX_PARMS]; |
64a6f950 | 1147 | static unsigned int num_slave_addrs; |
1da177e4 | 1148 | |
b361e27b CM |
1149 | #define IPMI_IO_ADDR_SPACE 0 |
1150 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1151 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1152 | |
1153 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1154 | ||
1155 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1156 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1157 | " Documentation/IPMI.txt in the kernel sources for the" | |
1158 | " gory details."); | |
1da177e4 LT |
1159 | |
1160 | module_param_named(trydefaults, si_trydefaults, bool, 0); | |
1161 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1162 | " default scan of the KCS and SMIC interface at the standard" | |
1163 | " address"); | |
1164 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1165 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1166 | " interface separated by commas. The types are 'kcs'," | |
1167 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1168 | " the first interface to kcs and the second to bt"); | |
64a6f950 | 1169 | module_param_array(addrs, ulong, &num_addrs, 0); |
1da177e4 LT |
1170 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" |
1171 | " addresses separated by commas. Only use if an interface" | |
1172 | " is in memory. Otherwise, set it to zero or leave" | |
1173 | " it blank."); | |
64a6f950 | 1174 | module_param_array(ports, uint, &num_ports, 0); |
1da177e4 LT |
1175 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" |
1176 | " addresses separated by commas. Only use if an interface" | |
1177 | " is a port. Otherwise, set it to zero or leave" | |
1178 | " it blank."); | |
1179 | module_param_array(irqs, int, &num_irqs, 0); | |
1180 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1181 | " addresses separated by commas. Only use if an interface" | |
1182 | " has an interrupt. Otherwise, set it to zero or leave" | |
1183 | " it blank."); | |
1184 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1185 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1186 | " and each successive register used by the interface. For" | |
1187 | " instance, if the start address is 0xca2 and the spacing" | |
1188 | " is 2, then the second address is at 0xca4. Defaults" | |
1189 | " to 1."); | |
1190 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1191 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1192 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1193 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1194 | " the 8-bit IPMI register has to be read from a larger" | |
1195 | " register."); | |
1196 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1197 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1198 | " IPMI register, in bits. For instance, if the data" | |
1199 | " is read from a 32-bit word and the IPMI data is in" | |
1200 | " bit 8-15, then the shift would be 8"); | |
1201 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1202 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1203 | " the controller. Normally this is 0x20, but can be" | |
1204 | " overridden by this parm. This is an array indexed" | |
1205 | " by interface number."); | |
a51f4a81 CM |
1206 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1207 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1208 | " disabled(0). Normally the IPMI driver auto-detects" | |
1209 | " this, but the value may be overridden by this parm."); | |
b361e27b CM |
1210 | module_param(unload_when_empty, int, 0); |
1211 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" | |
1212 | " specified or found, default is 1. Setting to 0" | |
1213 | " is useful for hot add of devices using hotmod."); | |
1da177e4 LT |
1214 | |
1215 | ||
b0defcdb | 1216 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1217 | { |
b0defcdb CM |
1218 | if (info->si_type == SI_BT) |
1219 | /* Disable the interrupt in the BT interface. */ | |
1220 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1221 | free_irq(info->irq, info); | |
1da177e4 | 1222 | } |
1da177e4 LT |
1223 | |
1224 | static int std_irq_setup(struct smi_info *info) | |
1225 | { | |
1226 | int rv; | |
1227 | ||
b0defcdb | 1228 | if (!info->irq) |
1da177e4 LT |
1229 | return 0; |
1230 | ||
9dbf68f9 CM |
1231 | if (info->si_type == SI_BT) { |
1232 | rv = request_irq(info->irq, | |
1233 | si_bt_irq_handler, | |
ee6cd5f8 | 1234 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1235 | DEVICE_NAME, |
1236 | info); | |
b0defcdb | 1237 | if (!rv) |
9dbf68f9 CM |
1238 | /* Enable the interrupt in the BT interface. */ |
1239 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1240 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1241 | } else | |
1242 | rv = request_irq(info->irq, | |
1243 | si_irq_handler, | |
ee6cd5f8 | 1244 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1245 | DEVICE_NAME, |
1246 | info); | |
1da177e4 LT |
1247 | if (rv) { |
1248 | printk(KERN_WARNING | |
1249 | "ipmi_si: %s unable to claim interrupt %d," | |
1250 | " running polled\n", | |
1251 | DEVICE_NAME, info->irq); | |
1252 | info->irq = 0; | |
1253 | } else { | |
b0defcdb | 1254 | info->irq_cleanup = std_irq_cleanup; |
1da177e4 LT |
1255 | printk(" Using irq %d\n", info->irq); |
1256 | } | |
1257 | ||
1258 | return rv; | |
1259 | } | |
1260 | ||
1da177e4 LT |
1261 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1262 | { | |
b0defcdb | 1263 | unsigned int addr = io->addr_data; |
1da177e4 | 1264 | |
b0defcdb | 1265 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1266 | } |
1267 | ||
1268 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1269 | unsigned char b) | |
1270 | { | |
b0defcdb | 1271 | unsigned int addr = io->addr_data; |
1da177e4 | 1272 | |
b0defcdb | 1273 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1274 | } |
1275 | ||
1276 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1277 | { | |
b0defcdb | 1278 | unsigned int addr = io->addr_data; |
1da177e4 | 1279 | |
b0defcdb | 1280 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1281 | } |
1282 | ||
1283 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1284 | unsigned char b) | |
1285 | { | |
b0defcdb | 1286 | unsigned int addr = io->addr_data; |
1da177e4 | 1287 | |
b0defcdb | 1288 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1289 | } |
1290 | ||
1291 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1292 | { | |
b0defcdb | 1293 | unsigned int addr = io->addr_data; |
1da177e4 | 1294 | |
b0defcdb | 1295 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1296 | } |
1297 | ||
1298 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1299 | unsigned char b) | |
1300 | { | |
b0defcdb | 1301 | unsigned int addr = io->addr_data; |
1da177e4 | 1302 | |
b0defcdb | 1303 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1304 | } |
1305 | ||
1306 | static void port_cleanup(struct smi_info *info) | |
1307 | { | |
b0defcdb | 1308 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1309 | int idx; |
1da177e4 | 1310 | |
b0defcdb | 1311 | if (addr) { |
c305e3d3 | 1312 | for (idx = 0; idx < info->io_size; idx++) |
d61a3ead CM |
1313 | release_region(addr + idx * info->io.regspacing, |
1314 | info->io.regsize); | |
1da177e4 | 1315 | } |
1da177e4 LT |
1316 | } |
1317 | ||
1318 | static int port_setup(struct smi_info *info) | |
1319 | { | |
b0defcdb | 1320 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1321 | int idx; |
1da177e4 | 1322 | |
b0defcdb | 1323 | if (!addr) |
1da177e4 LT |
1324 | return -ENODEV; |
1325 | ||
1326 | info->io_cleanup = port_cleanup; | |
1327 | ||
c305e3d3 CM |
1328 | /* |
1329 | * Figure out the actual inb/inw/inl/etc routine to use based | |
1330 | * upon the register size. | |
1331 | */ | |
1da177e4 LT |
1332 | switch (info->io.regsize) { |
1333 | case 1: | |
1334 | info->io.inputb = port_inb; | |
1335 | info->io.outputb = port_outb; | |
1336 | break; | |
1337 | case 2: | |
1338 | info->io.inputb = port_inw; | |
1339 | info->io.outputb = port_outw; | |
1340 | break; | |
1341 | case 4: | |
1342 | info->io.inputb = port_inl; | |
1343 | info->io.outputb = port_outl; | |
1344 | break; | |
1345 | default: | |
c305e3d3 | 1346 | printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n", |
1da177e4 LT |
1347 | info->io.regsize); |
1348 | return -EINVAL; | |
1349 | } | |
1350 | ||
c305e3d3 CM |
1351 | /* |
1352 | * Some BIOSes reserve disjoint I/O regions in their ACPI | |
d61a3ead CM |
1353 | * tables. This causes problems when trying to register the |
1354 | * entire I/O region. Therefore we must register each I/O | |
1355 | * port separately. | |
1356 | */ | |
c305e3d3 | 1357 | for (idx = 0; idx < info->io_size; idx++) { |
d61a3ead CM |
1358 | if (request_region(addr + idx * info->io.regspacing, |
1359 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1360 | /* Undo allocations */ | |
1361 | while (idx--) { | |
1362 | release_region(addr + idx * info->io.regspacing, | |
1363 | info->io.regsize); | |
1364 | } | |
1365 | return -EIO; | |
1366 | } | |
1367 | } | |
1da177e4 LT |
1368 | return 0; |
1369 | } | |
1370 | ||
546cfdf4 | 1371 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1372 | { |
1373 | return readb((io->addr)+(offset * io->regspacing)); | |
1374 | } | |
1375 | ||
546cfdf4 | 1376 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1377 | unsigned char b) |
1378 | { | |
1379 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1380 | } | |
1381 | ||
546cfdf4 | 1382 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1383 | { |
1384 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1385 | & 0xff; |
1da177e4 LT |
1386 | } |
1387 | ||
546cfdf4 | 1388 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1389 | unsigned char b) |
1390 | { | |
1391 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1392 | } | |
1393 | ||
546cfdf4 | 1394 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1395 | { |
1396 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1397 | & 0xff; |
1da177e4 LT |
1398 | } |
1399 | ||
546cfdf4 | 1400 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1401 | unsigned char b) |
1402 | { | |
1403 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1404 | } | |
1405 | ||
1406 | #ifdef readq | |
1407 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1408 | { | |
1409 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1410 | & 0xff; |
1da177e4 LT |
1411 | } |
1412 | ||
1413 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1414 | unsigned char b) | |
1415 | { | |
1416 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1417 | } | |
1418 | #endif | |
1419 | ||
1420 | static void mem_cleanup(struct smi_info *info) | |
1421 | { | |
b0defcdb | 1422 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1423 | int mapsize; |
1424 | ||
1425 | if (info->io.addr) { | |
1426 | iounmap(info->io.addr); | |
1427 | ||
1428 | mapsize = ((info->io_size * info->io.regspacing) | |
1429 | - (info->io.regspacing - info->io.regsize)); | |
1430 | ||
b0defcdb | 1431 | release_mem_region(addr, mapsize); |
1da177e4 | 1432 | } |
1da177e4 LT |
1433 | } |
1434 | ||
1435 | static int mem_setup(struct smi_info *info) | |
1436 | { | |
b0defcdb | 1437 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1438 | int mapsize; |
1439 | ||
b0defcdb | 1440 | if (!addr) |
1da177e4 LT |
1441 | return -ENODEV; |
1442 | ||
1443 | info->io_cleanup = mem_cleanup; | |
1444 | ||
c305e3d3 CM |
1445 | /* |
1446 | * Figure out the actual readb/readw/readl/etc routine to use based | |
1447 | * upon the register size. | |
1448 | */ | |
1da177e4 LT |
1449 | switch (info->io.regsize) { |
1450 | case 1: | |
546cfdf4 AD |
1451 | info->io.inputb = intf_mem_inb; |
1452 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1453 | break; |
1454 | case 2: | |
546cfdf4 AD |
1455 | info->io.inputb = intf_mem_inw; |
1456 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1457 | break; |
1458 | case 4: | |
546cfdf4 AD |
1459 | info->io.inputb = intf_mem_inl; |
1460 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1461 | break; |
1462 | #ifdef readq | |
1463 | case 8: | |
1464 | info->io.inputb = mem_inq; | |
1465 | info->io.outputb = mem_outq; | |
1466 | break; | |
1467 | #endif | |
1468 | default: | |
c305e3d3 | 1469 | printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n", |
1da177e4 LT |
1470 | info->io.regsize); |
1471 | return -EINVAL; | |
1472 | } | |
1473 | ||
c305e3d3 CM |
1474 | /* |
1475 | * Calculate the total amount of memory to claim. This is an | |
1da177e4 LT |
1476 | * unusual looking calculation, but it avoids claiming any |
1477 | * more memory than it has to. It will claim everything | |
1478 | * between the first address to the end of the last full | |
c305e3d3 CM |
1479 | * register. |
1480 | */ | |
1da177e4 LT |
1481 | mapsize = ((info->io_size * info->io.regspacing) |
1482 | - (info->io.regspacing - info->io.regsize)); | |
1483 | ||
b0defcdb | 1484 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1485 | return -EIO; |
1486 | ||
b0defcdb | 1487 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1488 | if (info->io.addr == NULL) { |
b0defcdb | 1489 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1490 | return -EIO; |
1491 | } | |
1492 | return 0; | |
1493 | } | |
1494 | ||
b361e27b CM |
1495 | /* |
1496 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1497 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1498 | * Options are: | |
1499 | * rsp=<regspacing> | |
1500 | * rsi=<regsize> | |
1501 | * rsh=<regshift> | |
1502 | * irq=<irq> | |
1503 | * ipmb=<ipmb addr> | |
1504 | */ | |
1505 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1506 | struct hotmod_vals { | |
1507 | char *name; | |
1508 | int val; | |
1509 | }; | |
1510 | static struct hotmod_vals hotmod_ops[] = { | |
1511 | { "add", HM_ADD }, | |
1512 | { "remove", HM_REMOVE }, | |
1513 | { NULL } | |
1514 | }; | |
1515 | static struct hotmod_vals hotmod_si[] = { | |
1516 | { "kcs", SI_KCS }, | |
1517 | { "smic", SI_SMIC }, | |
1518 | { "bt", SI_BT }, | |
1519 | { NULL } | |
1520 | }; | |
1521 | static struct hotmod_vals hotmod_as[] = { | |
1522 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1523 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1524 | { NULL } | |
1525 | }; | |
1d5636cc | 1526 | |
b361e27b CM |
1527 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1528 | { | |
1529 | char *s; | |
1530 | int i; | |
1531 | ||
1532 | s = strchr(*curr, ','); | |
1533 | if (!s) { | |
1534 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1535 | return -EINVAL; | |
1536 | } | |
1537 | *s = '\0'; | |
1538 | s++; | |
1539 | for (i = 0; hotmod_ops[i].name; i++) { | |
1d5636cc | 1540 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1541 | *val = v[i].val; |
1542 | *curr = s; | |
1543 | return 0; | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1548 | return -EINVAL; | |
1549 | } | |
1550 | ||
1d5636cc CM |
1551 | static int check_hotmod_int_op(const char *curr, const char *option, |
1552 | const char *name, int *val) | |
1553 | { | |
1554 | char *n; | |
1555 | ||
1556 | if (strcmp(curr, name) == 0) { | |
1557 | if (!option) { | |
1558 | printk(KERN_WARNING PFX | |
1559 | "No option given for '%s'\n", | |
1560 | curr); | |
1561 | return -EINVAL; | |
1562 | } | |
1563 | *val = simple_strtoul(option, &n, 0); | |
1564 | if ((*n != '\0') || (*option == '\0')) { | |
1565 | printk(KERN_WARNING PFX | |
1566 | "Bad option given for '%s'\n", | |
1567 | curr); | |
1568 | return -EINVAL; | |
1569 | } | |
1570 | return 1; | |
1571 | } | |
1572 | return 0; | |
1573 | } | |
1574 | ||
b361e27b CM |
1575 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1576 | { | |
1577 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1578 | int rv; |
b361e27b CM |
1579 | char *next, *curr, *s, *n, *o; |
1580 | enum hotmod_op op; | |
1581 | enum si_type si_type; | |
1582 | int addr_space; | |
1583 | unsigned long addr; | |
1584 | int regspacing; | |
1585 | int regsize; | |
1586 | int regshift; | |
1587 | int irq; | |
1588 | int ipmb; | |
1589 | int ival; | |
1d5636cc | 1590 | int len; |
b361e27b CM |
1591 | struct smi_info *info; |
1592 | ||
1593 | if (!str) | |
1594 | return -ENOMEM; | |
1595 | ||
1596 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1597 | len = strlen(str); |
1598 | ival = len - 1; | |
b361e27b CM |
1599 | while ((ival >= 0) && isspace(str[ival])) { |
1600 | str[ival] = '\0'; | |
1601 | ival--; | |
1602 | } | |
1603 | ||
1604 | for (curr = str; curr; curr = next) { | |
1605 | regspacing = 1; | |
1606 | regsize = 1; | |
1607 | regshift = 0; | |
1608 | irq = 0; | |
1609 | ipmb = 0x20; | |
1610 | ||
1611 | next = strchr(curr, ':'); | |
1612 | if (next) { | |
1613 | *next = '\0'; | |
1614 | next++; | |
1615 | } | |
1616 | ||
1617 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1618 | if (rv) | |
1619 | break; | |
1620 | op = ival; | |
1621 | ||
1622 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1623 | if (rv) | |
1624 | break; | |
1625 | si_type = ival; | |
1626 | ||
1627 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1628 | if (rv) | |
1629 | break; | |
1630 | ||
1631 | s = strchr(curr, ','); | |
1632 | if (s) { | |
1633 | *s = '\0'; | |
1634 | s++; | |
1635 | } | |
1636 | addr = simple_strtoul(curr, &n, 0); | |
1637 | if ((*n != '\0') || (*curr == '\0')) { | |
1638 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1639 | " '%s'\n", curr); | |
1640 | break; | |
1641 | } | |
1642 | ||
1643 | while (s) { | |
1644 | curr = s; | |
1645 | s = strchr(curr, ','); | |
1646 | if (s) { | |
1647 | *s = '\0'; | |
1648 | s++; | |
1649 | } | |
1650 | o = strchr(curr, '='); | |
1651 | if (o) { | |
1652 | *o = '\0'; | |
1653 | o++; | |
1654 | } | |
1d5636cc CM |
1655 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1656 | if (rv < 0) | |
b361e27b | 1657 | goto out; |
1d5636cc CM |
1658 | else if (rv) |
1659 | continue; | |
1660 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1661 | if (rv < 0) | |
1662 | goto out; | |
1663 | else if (rv) | |
1664 | continue; | |
1665 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1666 | if (rv < 0) | |
1667 | goto out; | |
1668 | else if (rv) | |
1669 | continue; | |
1670 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1671 | if (rv < 0) | |
1672 | goto out; | |
1673 | else if (rv) | |
1674 | continue; | |
1675 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1676 | if (rv < 0) | |
1677 | goto out; | |
1678 | else if (rv) | |
1679 | continue; | |
1680 | ||
1681 | rv = -EINVAL; | |
1682 | printk(KERN_WARNING PFX | |
1683 | "Invalid hotmod option '%s'\n", | |
1684 | curr); | |
1685 | goto out; | |
b361e27b CM |
1686 | } |
1687 | ||
1688 | if (op == HM_ADD) { | |
1689 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1690 | if (!info) { | |
1691 | rv = -ENOMEM; | |
1692 | goto out; | |
1693 | } | |
1694 | ||
1695 | info->addr_source = "hotmod"; | |
1696 | info->si_type = si_type; | |
1697 | info->io.addr_data = addr; | |
1698 | info->io.addr_type = addr_space; | |
1699 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1700 | info->io_setup = mem_setup; | |
1701 | else | |
1702 | info->io_setup = port_setup; | |
1703 | ||
1704 | info->io.addr = NULL; | |
1705 | info->io.regspacing = regspacing; | |
1706 | if (!info->io.regspacing) | |
1707 | info->io.regspacing = DEFAULT_REGSPACING; | |
1708 | info->io.regsize = regsize; | |
1709 | if (!info->io.regsize) | |
1710 | info->io.regsize = DEFAULT_REGSPACING; | |
1711 | info->io.regshift = regshift; | |
1712 | info->irq = irq; | |
1713 | if (info->irq) | |
1714 | info->irq_setup = std_irq_setup; | |
1715 | info->slave_addr = ipmb; | |
1716 | ||
1717 | try_smi_init(info); | |
1718 | } else { | |
1719 | /* remove */ | |
1720 | struct smi_info *e, *tmp_e; | |
1721 | ||
1722 | mutex_lock(&smi_infos_lock); | |
1723 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1724 | if (e->io.addr_type != addr_space) | |
1725 | continue; | |
1726 | if (e->si_type != si_type) | |
1727 | continue; | |
1728 | if (e->io.addr_data == addr) | |
1729 | cleanup_one_si(e); | |
1730 | } | |
1731 | mutex_unlock(&smi_infos_lock); | |
1732 | } | |
1733 | } | |
1d5636cc | 1734 | rv = len; |
b361e27b CM |
1735 | out: |
1736 | kfree(str); | |
1737 | return rv; | |
1738 | } | |
b0defcdb CM |
1739 | |
1740 | static __devinit void hardcode_find_bmc(void) | |
1da177e4 | 1741 | { |
b0defcdb | 1742 | int i; |
1da177e4 LT |
1743 | struct smi_info *info; |
1744 | ||
b0defcdb CM |
1745 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1746 | if (!ports[i] && !addrs[i]) | |
1747 | continue; | |
1da177e4 | 1748 | |
b0defcdb CM |
1749 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1750 | if (!info) | |
1751 | return; | |
1da177e4 | 1752 | |
b0defcdb | 1753 | info->addr_source = "hardcoded"; |
1da177e4 | 1754 | |
1d5636cc | 1755 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1756 | info->si_type = SI_KCS; |
1d5636cc | 1757 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1758 | info->si_type = SI_SMIC; |
1d5636cc | 1759 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1760 | info->si_type = SI_BT; |
1761 | } else { | |
1762 | printk(KERN_WARNING | |
1763 | "ipmi_si: Interface type specified " | |
1764 | "for interface %d, was invalid: %s\n", | |
1765 | i, si_type[i]); | |
1766 | kfree(info); | |
1767 | continue; | |
1768 | } | |
1da177e4 | 1769 | |
b0defcdb CM |
1770 | if (ports[i]) { |
1771 | /* An I/O port */ | |
1772 | info->io_setup = port_setup; | |
1773 | info->io.addr_data = ports[i]; | |
1774 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1775 | } else if (addrs[i]) { | |
1776 | /* A memory port */ | |
1777 | info->io_setup = mem_setup; | |
1778 | info->io.addr_data = addrs[i]; | |
1779 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1780 | } else { | |
1781 | printk(KERN_WARNING | |
1782 | "ipmi_si: Interface type specified " | |
1783 | "for interface %d, " | |
1784 | "but port and address were not set or " | |
1785 | "set to zero.\n", i); | |
1786 | kfree(info); | |
1787 | continue; | |
1788 | } | |
1da177e4 | 1789 | |
b0defcdb CM |
1790 | info->io.addr = NULL; |
1791 | info->io.regspacing = regspacings[i]; | |
1792 | if (!info->io.regspacing) | |
1793 | info->io.regspacing = DEFAULT_REGSPACING; | |
1794 | info->io.regsize = regsizes[i]; | |
1795 | if (!info->io.regsize) | |
1796 | info->io.regsize = DEFAULT_REGSPACING; | |
1797 | info->io.regshift = regshifts[i]; | |
1798 | info->irq = irqs[i]; | |
1799 | if (info->irq) | |
1800 | info->irq_setup = std_irq_setup; | |
1da177e4 | 1801 | |
b0defcdb CM |
1802 | try_smi_init(info); |
1803 | } | |
1804 | } | |
1da177e4 | 1805 | |
8466361a | 1806 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1807 | |
1808 | #include <linux/acpi.h> | |
1809 | ||
c305e3d3 CM |
1810 | /* |
1811 | * Once we get an ACPI failure, we don't try any more, because we go | |
1812 | * through the tables sequentially. Once we don't find a table, there | |
1813 | * are no more. | |
1814 | */ | |
0c8204b3 | 1815 | static int acpi_failure; |
1da177e4 LT |
1816 | |
1817 | /* For GPE-type interrupts. */ | |
1818 | static u32 ipmi_acpi_gpe(void *context) | |
1819 | { | |
1820 | struct smi_info *smi_info = context; | |
1821 | unsigned long flags; | |
1822 | #ifdef DEBUG_TIMING | |
1823 | struct timeval t; | |
1824 | #endif | |
1825 | ||
1826 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1827 | ||
64959e2d | 1828 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1829 | |
1da177e4 LT |
1830 | #ifdef DEBUG_TIMING |
1831 | do_gettimeofday(&t); | |
1832 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1833 | #endif | |
1834 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1835 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1836 | ||
1837 | return ACPI_INTERRUPT_HANDLED; | |
1838 | } | |
1839 | ||
b0defcdb CM |
1840 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
1841 | { | |
1842 | if (!info->irq) | |
1843 | return; | |
1844 | ||
1845 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1846 | } | |
1847 | ||
1da177e4 LT |
1848 | static int acpi_gpe_irq_setup(struct smi_info *info) |
1849 | { | |
1850 | acpi_status status; | |
1851 | ||
b0defcdb | 1852 | if (!info->irq) |
1da177e4 LT |
1853 | return 0; |
1854 | ||
1855 | /* FIXME - is level triggered right? */ | |
1856 | status = acpi_install_gpe_handler(NULL, | |
1857 | info->irq, | |
1858 | ACPI_GPE_LEVEL_TRIGGERED, | |
1859 | &ipmi_acpi_gpe, | |
1860 | info); | |
1861 | if (status != AE_OK) { | |
1862 | printk(KERN_WARNING | |
1863 | "ipmi_si: %s unable to claim ACPI GPE %d," | |
1864 | " running polled\n", | |
1865 | DEVICE_NAME, info->irq); | |
1866 | info->irq = 0; | |
1867 | return -EINVAL; | |
1868 | } else { | |
b0defcdb | 1869 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
1da177e4 LT |
1870 | printk(" Using ACPI GPE %d\n", info->irq); |
1871 | return 0; | |
1872 | } | |
1873 | } | |
1874 | ||
1da177e4 LT |
1875 | /* |
1876 | * Defined at | |
c305e3d3 CM |
1877 | * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/ |
1878 | * Docs/TechPapers/IA64/hpspmi.pdf | |
1da177e4 LT |
1879 | */ |
1880 | struct SPMITable { | |
1881 | s8 Signature[4]; | |
1882 | u32 Length; | |
1883 | u8 Revision; | |
1884 | u8 Checksum; | |
1885 | s8 OEMID[6]; | |
1886 | s8 OEMTableID[8]; | |
1887 | s8 OEMRevision[4]; | |
1888 | s8 CreatorID[4]; | |
1889 | s8 CreatorRevision[4]; | |
1890 | u8 InterfaceType; | |
1891 | u8 IPMIlegacy; | |
1892 | s16 SpecificationRevision; | |
1893 | ||
1894 | /* | |
1895 | * Bit 0 - SCI interrupt supported | |
1896 | * Bit 1 - I/O APIC/SAPIC | |
1897 | */ | |
1898 | u8 InterruptType; | |
1899 | ||
c305e3d3 CM |
1900 | /* |
1901 | * If bit 0 of InterruptType is set, then this is the SCI | |
1902 | * interrupt in the GPEx_STS register. | |
1903 | */ | |
1da177e4 LT |
1904 | u8 GPE; |
1905 | ||
1906 | s16 Reserved; | |
1907 | ||
c305e3d3 CM |
1908 | /* |
1909 | * If bit 1 of InterruptType is set, then this is the I/O | |
1910 | * APIC/SAPIC interrupt. | |
1911 | */ | |
1da177e4 LT |
1912 | u32 GlobalSystemInterrupt; |
1913 | ||
1914 | /* The actual register address. */ | |
1915 | struct acpi_generic_address addr; | |
1916 | ||
1917 | u8 UID[4]; | |
1918 | ||
1919 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
1920 | }; | |
1921 | ||
b0defcdb | 1922 | static __devinit int try_init_acpi(struct SPMITable *spmi) |
1da177e4 LT |
1923 | { |
1924 | struct smi_info *info; | |
1da177e4 LT |
1925 | u8 addr_space; |
1926 | ||
1da177e4 LT |
1927 | if (spmi->IPMIlegacy != 1) { |
1928 | printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy); | |
c305e3d3 | 1929 | return -ENODEV; |
1da177e4 LT |
1930 | } |
1931 | ||
15a58ed1 | 1932 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
1da177e4 LT |
1933 | addr_space = IPMI_MEM_ADDR_SPACE; |
1934 | else | |
1935 | addr_space = IPMI_IO_ADDR_SPACE; | |
b0defcdb CM |
1936 | |
1937 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1938 | if (!info) { | |
1939 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n"); | |
1940 | return -ENOMEM; | |
1941 | } | |
1942 | ||
1943 | info->addr_source = "ACPI"; | |
1da177e4 | 1944 | |
1da177e4 | 1945 | /* Figure out the interface type. */ |
c305e3d3 | 1946 | switch (spmi->InterfaceType) { |
1da177e4 | 1947 | case 1: /* KCS */ |
b0defcdb | 1948 | info->si_type = SI_KCS; |
1da177e4 | 1949 | break; |
1da177e4 | 1950 | case 2: /* SMIC */ |
b0defcdb | 1951 | info->si_type = SI_SMIC; |
1da177e4 | 1952 | break; |
1da177e4 | 1953 | case 3: /* BT */ |
b0defcdb | 1954 | info->si_type = SI_BT; |
1da177e4 | 1955 | break; |
1da177e4 LT |
1956 | default: |
1957 | printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n", | |
1958 | spmi->InterfaceType); | |
b0defcdb | 1959 | kfree(info); |
1da177e4 LT |
1960 | return -EIO; |
1961 | } | |
1962 | ||
1da177e4 LT |
1963 | if (spmi->InterruptType & 1) { |
1964 | /* We've got a GPE interrupt. */ | |
1965 | info->irq = spmi->GPE; | |
1966 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
1967 | } else if (spmi->InterruptType & 2) { |
1968 | /* We've got an APIC/SAPIC interrupt. */ | |
1969 | info->irq = spmi->GlobalSystemInterrupt; | |
1970 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
1971 | } else { |
1972 | /* Use the default interrupt setting. */ | |
1973 | info->irq = 0; | |
1974 | info->irq_setup = NULL; | |
1975 | } | |
1976 | ||
15a58ed1 | 1977 | if (spmi->addr.bit_width) { |
35bc37a0 | 1978 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 1979 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 1980 | } else { |
35bc37a0 CM |
1981 | info->io.regspacing = DEFAULT_REGSPACING; |
1982 | } | |
b0defcdb | 1983 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 1984 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 1985 | |
15a58ed1 | 1986 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 1987 | info->io_setup = mem_setup; |
8fe1425a | 1988 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
15a58ed1 | 1989 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 1990 | info->io_setup = port_setup; |
8fe1425a | 1991 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
1992 | } else { |
1993 | kfree(info); | |
c305e3d3 CM |
1994 | printk(KERN_WARNING |
1995 | "ipmi_si: Unknown ACPI I/O Address type\n"); | |
1da177e4 LT |
1996 | return -EIO; |
1997 | } | |
b0defcdb | 1998 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 1999 | |
b0defcdb | 2000 | try_smi_init(info); |
1da177e4 | 2001 | |
1da177e4 LT |
2002 | return 0; |
2003 | } | |
b0defcdb CM |
2004 | |
2005 | static __devinit void acpi_find_bmc(void) | |
2006 | { | |
2007 | acpi_status status; | |
2008 | struct SPMITable *spmi; | |
2009 | int i; | |
2010 | ||
2011 | if (acpi_disabled) | |
2012 | return; | |
2013 | ||
2014 | if (acpi_failure) | |
2015 | return; | |
2016 | ||
2017 | for (i = 0; ; i++) { | |
15a58ed1 AS |
2018 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
2019 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
2020 | if (status != AE_OK) |
2021 | return; | |
2022 | ||
2023 | try_init_acpi(spmi); | |
2024 | } | |
2025 | } | |
1da177e4 LT |
2026 | #endif |
2027 | ||
a9fad4cc | 2028 | #ifdef CONFIG_DMI |
c305e3d3 | 2029 | struct dmi_ipmi_data { |
1da177e4 LT |
2030 | u8 type; |
2031 | u8 addr_space; | |
2032 | unsigned long base_addr; | |
2033 | u8 irq; | |
2034 | u8 offset; | |
2035 | u8 slave_addr; | |
b0defcdb | 2036 | }; |
1da177e4 | 2037 | |
1855256c | 2038 | static int __devinit decode_dmi(const struct dmi_header *dm, |
b0defcdb | 2039 | struct dmi_ipmi_data *dmi) |
1da177e4 | 2040 | { |
1855256c | 2041 | const u8 *data = (const u8 *)dm; |
1da177e4 LT |
2042 | unsigned long base_addr; |
2043 | u8 reg_spacing; | |
b224cd3a | 2044 | u8 len = dm->length; |
1da177e4 | 2045 | |
b0defcdb | 2046 | dmi->type = data[4]; |
1da177e4 LT |
2047 | |
2048 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
2049 | if (len >= 0x11) { | |
2050 | if (base_addr & 1) { | |
2051 | /* I/O */ | |
2052 | base_addr &= 0xFFFE; | |
b0defcdb | 2053 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
c305e3d3 | 2054 | } else |
1da177e4 | 2055 | /* Memory */ |
b0defcdb | 2056 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
c305e3d3 | 2057 | |
1da177e4 LT |
2058 | /* If bit 4 of byte 0x10 is set, then the lsb for the address |
2059 | is odd. */ | |
b0defcdb | 2060 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 2061 | |
b0defcdb | 2062 | dmi->irq = data[0x11]; |
1da177e4 LT |
2063 | |
2064 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 2065 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
c305e3d3 | 2066 | switch (reg_spacing) { |
1da177e4 | 2067 | case 0x00: /* Byte boundaries */ |
b0defcdb | 2068 | dmi->offset = 1; |
1da177e4 LT |
2069 | break; |
2070 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 2071 | dmi->offset = 4; |
1da177e4 LT |
2072 | break; |
2073 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 2074 | dmi->offset = 16; |
1da177e4 LT |
2075 | break; |
2076 | default: | |
2077 | /* Some other interface, just ignore it. */ | |
2078 | return -EIO; | |
2079 | } | |
2080 | } else { | |
2081 | /* Old DMI spec. */ | |
c305e3d3 CM |
2082 | /* |
2083 | * Note that technically, the lower bit of the base | |
92068801 CM |
2084 | * address should be 1 if the address is I/O and 0 if |
2085 | * the address is in memory. So many systems get that | |
2086 | * wrong (and all that I have seen are I/O) so we just | |
2087 | * ignore that bit and assume I/O. Systems that use | |
c305e3d3 CM |
2088 | * memory should use the newer spec, anyway. |
2089 | */ | |
b0defcdb CM |
2090 | dmi->base_addr = base_addr & 0xfffe; |
2091 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
2092 | dmi->offset = 1; | |
1da177e4 LT |
2093 | } |
2094 | ||
b0defcdb | 2095 | dmi->slave_addr = data[6]; |
1da177e4 | 2096 | |
b0defcdb | 2097 | return 0; |
1da177e4 LT |
2098 | } |
2099 | ||
b0defcdb | 2100 | static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 2101 | { |
b0defcdb | 2102 | struct smi_info *info; |
1da177e4 | 2103 | |
b0defcdb CM |
2104 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2105 | if (!info) { | |
2106 | printk(KERN_ERR | |
2107 | "ipmi_si: Could not allocate SI data\n"); | |
2108 | return; | |
1da177e4 | 2109 | } |
1da177e4 | 2110 | |
b0defcdb | 2111 | info->addr_source = "SMBIOS"; |
1da177e4 | 2112 | |
e8b33617 | 2113 | switch (ipmi_data->type) { |
b0defcdb CM |
2114 | case 0x01: /* KCS */ |
2115 | info->si_type = SI_KCS; | |
2116 | break; | |
2117 | case 0x02: /* SMIC */ | |
2118 | info->si_type = SI_SMIC; | |
2119 | break; | |
2120 | case 0x03: /* BT */ | |
2121 | info->si_type = SI_BT; | |
2122 | break; | |
2123 | default: | |
80cd6920 | 2124 | kfree(info); |
b0defcdb | 2125 | return; |
1da177e4 | 2126 | } |
1da177e4 | 2127 | |
b0defcdb CM |
2128 | switch (ipmi_data->addr_space) { |
2129 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2130 | info->io_setup = mem_setup; |
b0defcdb CM |
2131 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2132 | break; | |
2133 | ||
2134 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2135 | info->io_setup = port_setup; |
b0defcdb CM |
2136 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2137 | break; | |
2138 | ||
2139 | default: | |
1da177e4 | 2140 | kfree(info); |
b0defcdb CM |
2141 | printk(KERN_WARNING |
2142 | "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n", | |
2143 | ipmi_data->addr_space); | |
2144 | return; | |
1da177e4 | 2145 | } |
b0defcdb | 2146 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2147 | |
b0defcdb CM |
2148 | info->io.regspacing = ipmi_data->offset; |
2149 | if (!info->io.regspacing) | |
1da177e4 LT |
2150 | info->io.regspacing = DEFAULT_REGSPACING; |
2151 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2152 | info->io.regshift = 0; |
1da177e4 LT |
2153 | |
2154 | info->slave_addr = ipmi_data->slave_addr; | |
2155 | ||
b0defcdb CM |
2156 | info->irq = ipmi_data->irq; |
2157 | if (info->irq) | |
2158 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2159 | |
b0defcdb CM |
2160 | try_smi_init(info); |
2161 | } | |
1da177e4 | 2162 | |
b0defcdb CM |
2163 | static void __devinit dmi_find_bmc(void) |
2164 | { | |
1855256c | 2165 | const struct dmi_device *dev = NULL; |
b0defcdb CM |
2166 | struct dmi_ipmi_data data; |
2167 | int rv; | |
2168 | ||
2169 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2170 | memset(&data, 0, sizeof(data)); |
1855256c JG |
2171 | rv = decode_dmi((const struct dmi_header *) dev->device_data, |
2172 | &data); | |
b0defcdb CM |
2173 | if (!rv) |
2174 | try_init_dmi(&data); | |
2175 | } | |
1da177e4 | 2176 | } |
a9fad4cc | 2177 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2178 | |
2179 | #ifdef CONFIG_PCI | |
2180 | ||
b0defcdb CM |
2181 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2182 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2183 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2184 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2185 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2186 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2187 | ||
1da177e4 LT |
2188 | #define PCI_HP_VENDOR_ID 0x103C |
2189 | #define PCI_MMC_DEVICE_ID 0x121A | |
2190 | #define PCI_MMC_ADDR_CW 0x10 | |
2191 | ||
b0defcdb CM |
2192 | static void ipmi_pci_cleanup(struct smi_info *info) |
2193 | { | |
2194 | struct pci_dev *pdev = info->addr_source_data; | |
2195 | ||
2196 | pci_disable_device(pdev); | |
2197 | } | |
1da177e4 | 2198 | |
b0defcdb CM |
2199 | static int __devinit ipmi_pci_probe(struct pci_dev *pdev, |
2200 | const struct pci_device_id *ent) | |
1da177e4 | 2201 | { |
b0defcdb CM |
2202 | int rv; |
2203 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2204 | struct smi_info *info; | |
2205 | int first_reg_offset = 0; | |
1da177e4 | 2206 | |
b0defcdb CM |
2207 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2208 | if (!info) | |
1cd441f9 | 2209 | return -ENOMEM; |
1da177e4 | 2210 | |
b0defcdb | 2211 | info->addr_source = "PCI"; |
1da177e4 | 2212 | |
b0defcdb CM |
2213 | switch (class_type) { |
2214 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2215 | info->si_type = SI_SMIC; | |
2216 | break; | |
1da177e4 | 2217 | |
b0defcdb CM |
2218 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2219 | info->si_type = SI_KCS; | |
2220 | break; | |
2221 | ||
2222 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2223 | info->si_type = SI_BT; | |
2224 | break; | |
2225 | ||
2226 | default: | |
2227 | kfree(info); | |
2228 | printk(KERN_INFO "ipmi_si: %s: Unknown IPMI type: %d\n", | |
2229 | pci_name(pdev), class_type); | |
1cd441f9 | 2230 | return -ENOMEM; |
1da177e4 LT |
2231 | } |
2232 | ||
b0defcdb CM |
2233 | rv = pci_enable_device(pdev); |
2234 | if (rv) { | |
2235 | printk(KERN_ERR "ipmi_si: %s: couldn't enable PCI device\n", | |
2236 | pci_name(pdev)); | |
2237 | kfree(info); | |
2238 | return rv; | |
1da177e4 LT |
2239 | } |
2240 | ||
b0defcdb CM |
2241 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2242 | info->addr_source_data = pdev; | |
1da177e4 | 2243 | |
b0defcdb CM |
2244 | if (pdev->subsystem_vendor == PCI_HP_VENDOR_ID) |
2245 | first_reg_offset = 1; | |
1da177e4 | 2246 | |
b0defcdb CM |
2247 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2248 | info->io_setup = port_setup; | |
2249 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2250 | } else { | |
2251 | info->io_setup = mem_setup; | |
2252 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2253 | } |
b0defcdb | 2254 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2255 | |
b0defcdb | 2256 | info->io.regspacing = DEFAULT_REGSPACING; |
1da177e4 | 2257 | info->io.regsize = DEFAULT_REGSPACING; |
b0defcdb | 2258 | info->io.regshift = 0; |
1da177e4 | 2259 | |
b0defcdb CM |
2260 | info->irq = pdev->irq; |
2261 | if (info->irq) | |
2262 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2263 | |
50c812b2 | 2264 | info->dev = &pdev->dev; |
fca3b747 | 2265 | pci_set_drvdata(pdev, info); |
50c812b2 | 2266 | |
b0defcdb CM |
2267 | return try_smi_init(info); |
2268 | } | |
1da177e4 | 2269 | |
b0defcdb CM |
2270 | static void __devexit ipmi_pci_remove(struct pci_dev *pdev) |
2271 | { | |
fca3b747 CM |
2272 | struct smi_info *info = pci_get_drvdata(pdev); |
2273 | cleanup_one_si(info); | |
b0defcdb | 2274 | } |
1da177e4 | 2275 | |
b0defcdb CM |
2276 | #ifdef CONFIG_PM |
2277 | static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
2278 | { | |
1da177e4 LT |
2279 | return 0; |
2280 | } | |
1da177e4 | 2281 | |
b0defcdb | 2282 | static int ipmi_pci_resume(struct pci_dev *pdev) |
1da177e4 | 2283 | { |
b0defcdb CM |
2284 | return 0; |
2285 | } | |
1da177e4 | 2286 | #endif |
1da177e4 | 2287 | |
b0defcdb CM |
2288 | static struct pci_device_id ipmi_pci_devices[] = { |
2289 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
248bdd5e KC |
2290 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, |
2291 | { 0, } | |
b0defcdb CM |
2292 | }; |
2293 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2294 | ||
2295 | static struct pci_driver ipmi_pci_driver = { | |
c305e3d3 CM |
2296 | .name = DEVICE_NAME, |
2297 | .id_table = ipmi_pci_devices, | |
2298 | .probe = ipmi_pci_probe, | |
2299 | .remove = __devexit_p(ipmi_pci_remove), | |
b0defcdb | 2300 | #ifdef CONFIG_PM |
c305e3d3 CM |
2301 | .suspend = ipmi_pci_suspend, |
2302 | .resume = ipmi_pci_resume, | |
b0defcdb CM |
2303 | #endif |
2304 | }; | |
2305 | #endif /* CONFIG_PCI */ | |
1da177e4 LT |
2306 | |
2307 | ||
dba9b4f6 CM |
2308 | #ifdef CONFIG_PPC_OF |
2309 | static int __devinit ipmi_of_probe(struct of_device *dev, | |
2310 | const struct of_device_id *match) | |
2311 | { | |
2312 | struct smi_info *info; | |
2313 | struct resource resource; | |
2314 | const int *regsize, *regspacing, *regshift; | |
2315 | struct device_node *np = dev->node; | |
2316 | int ret; | |
2317 | int proplen; | |
2318 | ||
2319 | dev_info(&dev->dev, PFX "probing via device tree\n"); | |
2320 | ||
2321 | ret = of_address_to_resource(np, 0, &resource); | |
2322 | if (ret) { | |
2323 | dev_warn(&dev->dev, PFX "invalid address from OF\n"); | |
2324 | return ret; | |
2325 | } | |
2326 | ||
9c25099d | 2327 | regsize = of_get_property(np, "reg-size", &proplen); |
dba9b4f6 CM |
2328 | if (regsize && proplen != 4) { |
2329 | dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); | |
2330 | return -EINVAL; | |
2331 | } | |
2332 | ||
9c25099d | 2333 | regspacing = of_get_property(np, "reg-spacing", &proplen); |
dba9b4f6 CM |
2334 | if (regspacing && proplen != 4) { |
2335 | dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); | |
2336 | return -EINVAL; | |
2337 | } | |
2338 | ||
9c25099d | 2339 | regshift = of_get_property(np, "reg-shift", &proplen); |
dba9b4f6 CM |
2340 | if (regshift && proplen != 4) { |
2341 | dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); | |
2342 | return -EINVAL; | |
2343 | } | |
2344 | ||
2345 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2346 | ||
2347 | if (!info) { | |
2348 | dev_err(&dev->dev, | |
2349 | PFX "could not allocate memory for OF probe\n"); | |
2350 | return -ENOMEM; | |
2351 | } | |
2352 | ||
2353 | info->si_type = (enum si_type) match->data; | |
2354 | info->addr_source = "device-tree"; | |
dba9b4f6 CM |
2355 | info->irq_setup = std_irq_setup; |
2356 | ||
3b7ec117 NC |
2357 | if (resource.flags & IORESOURCE_IO) { |
2358 | info->io_setup = port_setup; | |
2359 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2360 | } else { | |
2361 | info->io_setup = mem_setup; | |
2362 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2363 | } | |
2364 | ||
dba9b4f6 CM |
2365 | info->io.addr_data = resource.start; |
2366 | ||
2367 | info->io.regsize = regsize ? *regsize : DEFAULT_REGSIZE; | |
2368 | info->io.regspacing = regspacing ? *regspacing : DEFAULT_REGSPACING; | |
2369 | info->io.regshift = regshift ? *regshift : 0; | |
2370 | ||
2371 | info->irq = irq_of_parse_and_map(dev->node, 0); | |
2372 | info->dev = &dev->dev; | |
2373 | ||
32d21985 | 2374 | dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %x\n", |
dba9b4f6 CM |
2375 | info->io.addr_data, info->io.regsize, info->io.regspacing, |
2376 | info->irq); | |
2377 | ||
c305e3d3 | 2378 | dev->dev.driver_data = (void *) info; |
dba9b4f6 CM |
2379 | |
2380 | return try_smi_init(info); | |
2381 | } | |
2382 | ||
2383 | static int __devexit ipmi_of_remove(struct of_device *dev) | |
2384 | { | |
2385 | cleanup_one_si(dev->dev.driver_data); | |
2386 | return 0; | |
2387 | } | |
2388 | ||
2389 | static struct of_device_id ipmi_match[] = | |
2390 | { | |
c305e3d3 CM |
2391 | { .type = "ipmi", .compatible = "ipmi-kcs", |
2392 | .data = (void *)(unsigned long) SI_KCS }, | |
2393 | { .type = "ipmi", .compatible = "ipmi-smic", | |
2394 | .data = (void *)(unsigned long) SI_SMIC }, | |
2395 | { .type = "ipmi", .compatible = "ipmi-bt", | |
2396 | .data = (void *)(unsigned long) SI_BT }, | |
dba9b4f6 CM |
2397 | {}, |
2398 | }; | |
2399 | ||
c305e3d3 | 2400 | static struct of_platform_driver ipmi_of_platform_driver = { |
dba9b4f6 CM |
2401 | .name = "ipmi", |
2402 | .match_table = ipmi_match, | |
2403 | .probe = ipmi_of_probe, | |
2404 | .remove = __devexit_p(ipmi_of_remove), | |
2405 | }; | |
2406 | #endif /* CONFIG_PPC_OF */ | |
2407 | ||
2408 | ||
1da177e4 LT |
2409 | static int try_get_dev_id(struct smi_info *smi_info) |
2410 | { | |
50c812b2 CM |
2411 | unsigned char msg[2]; |
2412 | unsigned char *resp; | |
2413 | unsigned long resp_len; | |
2414 | enum si_sm_result smi_result; | |
2415 | int rv = 0; | |
1da177e4 LT |
2416 | |
2417 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
b0defcdb | 2418 | if (!resp) |
1da177e4 LT |
2419 | return -ENOMEM; |
2420 | ||
c305e3d3 CM |
2421 | /* |
2422 | * Do a Get Device ID command, since it comes back with some | |
2423 | * useful info. | |
2424 | */ | |
1da177e4 LT |
2425 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; |
2426 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2427 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2428 | ||
2429 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 2430 | for (;;) { |
c3e7e791 CM |
2431 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2432 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2433 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2434 | smi_result = smi_info->handlers->event( |
2435 | smi_info->si_sm, 100); | |
c305e3d3 | 2436 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
2437 | smi_result = smi_info->handlers->event( |
2438 | smi_info->si_sm, 0); | |
c305e3d3 | 2439 | } else |
1da177e4 LT |
2440 | break; |
2441 | } | |
2442 | if (smi_result == SI_SM_HOSED) { | |
c305e3d3 CM |
2443 | /* |
2444 | * We couldn't get the state machine to run, so whatever's at | |
2445 | * the port is probably not an IPMI SMI interface. | |
2446 | */ | |
1da177e4 LT |
2447 | rv = -ENODEV; |
2448 | goto out; | |
2449 | } | |
2450 | ||
2451 | /* Otherwise, we got some data. */ | |
2452 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2453 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 2454 | |
d8c98618 CM |
2455 | /* Check and record info from the get device id, in case we need it. */ |
2456 | rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); | |
1da177e4 LT |
2457 | |
2458 | out: | |
2459 | kfree(resp); | |
2460 | return rv; | |
2461 | } | |
2462 | ||
2463 | static int type_file_read_proc(char *page, char **start, off_t off, | |
2464 | int count, int *eof, void *data) | |
2465 | { | |
1da177e4 LT |
2466 | struct smi_info *smi = data; |
2467 | ||
b361e27b | 2468 | return sprintf(page, "%s\n", si_to_str[smi->si_type]); |
1da177e4 LT |
2469 | } |
2470 | ||
2471 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
2472 | int count, int *eof, void *data) | |
2473 | { | |
2474 | char *out = (char *) page; | |
2475 | struct smi_info *smi = data; | |
2476 | ||
2477 | out += sprintf(out, "interrupts_enabled: %d\n", | |
b0defcdb | 2478 | smi->irq && !smi->interrupt_disabled); |
64959e2d CM |
2479 | out += sprintf(out, "short_timeouts: %u\n", |
2480 | smi_get_stat(smi, short_timeouts)); | |
2481 | out += sprintf(out, "long_timeouts: %u\n", | |
2482 | smi_get_stat(smi, long_timeouts)); | |
64959e2d CM |
2483 | out += sprintf(out, "idles: %u\n", |
2484 | smi_get_stat(smi, idles)); | |
2485 | out += sprintf(out, "interrupts: %u\n", | |
2486 | smi_get_stat(smi, interrupts)); | |
2487 | out += sprintf(out, "attentions: %u\n", | |
2488 | smi_get_stat(smi, attentions)); | |
2489 | out += sprintf(out, "flag_fetches: %u\n", | |
2490 | smi_get_stat(smi, flag_fetches)); | |
2491 | out += sprintf(out, "hosed_count: %u\n", | |
2492 | smi_get_stat(smi, hosed_count)); | |
2493 | out += sprintf(out, "complete_transactions: %u\n", | |
2494 | smi_get_stat(smi, complete_transactions)); | |
2495 | out += sprintf(out, "events: %u\n", | |
2496 | smi_get_stat(smi, events)); | |
2497 | out += sprintf(out, "watchdog_pretimeouts: %u\n", | |
2498 | smi_get_stat(smi, watchdog_pretimeouts)); | |
2499 | out += sprintf(out, "incoming_messages: %u\n", | |
2500 | smi_get_stat(smi, incoming_messages)); | |
1da177e4 | 2501 | |
b361e27b CM |
2502 | return out - page; |
2503 | } | |
2504 | ||
2505 | static int param_read_proc(char *page, char **start, off_t off, | |
2506 | int count, int *eof, void *data) | |
2507 | { | |
2508 | struct smi_info *smi = data; | |
2509 | ||
2510 | return sprintf(page, | |
2511 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", | |
2512 | si_to_str[smi->si_type], | |
2513 | addr_space_to_str[smi->io.addr_type], | |
2514 | smi->io.addr_data, | |
2515 | smi->io.regspacing, | |
2516 | smi->io.regsize, | |
2517 | smi->io.regshift, | |
2518 | smi->irq, | |
2519 | smi->slave_addr); | |
1da177e4 LT |
2520 | } |
2521 | ||
3ae0e0f9 CM |
2522 | /* |
2523 | * oem_data_avail_to_receive_msg_avail | |
2524 | * @info - smi_info structure with msg_flags set | |
2525 | * | |
2526 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
2527 | * Returns 1 indicating need to re-run handle_flags(). | |
2528 | */ | |
2529 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
2530 | { | |
e8b33617 | 2531 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 2532 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
2533 | return 1; |
2534 | } | |
2535 | ||
2536 | /* | |
2537 | * setup_dell_poweredge_oem_data_handler | |
2538 | * @info - smi_info.device_id must be populated | |
2539 | * | |
2540 | * Systems that match, but have firmware version < 1.40 may assert | |
2541 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
2542 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
2543 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
2544 | * as RECEIVE_MSG_AVAIL instead. | |
2545 | * | |
2546 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
2547 | * assert the OEM[012] bits, and if it did, the driver would have to | |
2548 | * change to handle that properly, we don't actually check for the | |
2549 | * firmware version. | |
2550 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
2551 | * Device Revision = 0x80 | |
2552 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
2553 | * Firmware Revision2 = 0x40 BCD encoded | |
2554 | * IPMI Version = 0x51 IPMI 1.5 | |
2555 | * Manufacturer ID = A2 02 00 Dell IANA | |
2556 | * | |
d5a2b89a CM |
2557 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
2558 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
2559 | * | |
3ae0e0f9 CM |
2560 | */ |
2561 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
2562 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
2563 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 2564 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
2565 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
2566 | { | |
2567 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2568 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
2569 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
2570 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 2571 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
2572 | smi_info->oem_data_avail_handler = |
2573 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
2574 | } else if (ipmi_version_major(id) < 1 || |
2575 | (ipmi_version_major(id) == 1 && | |
2576 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
2577 | smi_info->oem_data_avail_handler = |
2578 | oem_data_avail_to_receive_msg_avail; | |
2579 | } | |
3ae0e0f9 CM |
2580 | } |
2581 | } | |
2582 | ||
ea94027b CM |
2583 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
2584 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
2585 | { | |
2586 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
2587 | ||
2588 | /* Make it a reponse */ | |
2589 | msg->rsp[0] = msg->data[0] | 4; | |
2590 | msg->rsp[1] = msg->data[1]; | |
2591 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
2592 | msg->rsp_size = 3; | |
2593 | smi_info->curr_msg = NULL; | |
2594 | deliver_recv_msg(smi_info, msg); | |
2595 | } | |
2596 | ||
2597 | /* | |
2598 | * dell_poweredge_bt_xaction_handler | |
2599 | * @info - smi_info.device_id must be populated | |
2600 | * | |
2601 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
2602 | * not respond to a Get SDR command if the length of the data | |
2603 | * requested is exactly 0x3A, which leads to command timeouts and no | |
2604 | * data returned. This intercepts such commands, and causes userspace | |
2605 | * callers to try again with a different-sized buffer, which succeeds. | |
2606 | */ | |
2607 | ||
2608 | #define STORAGE_NETFN 0x0A | |
2609 | #define STORAGE_CMD_GET_SDR 0x23 | |
2610 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
2611 | unsigned long unused, | |
2612 | void *in) | |
2613 | { | |
2614 | struct smi_info *smi_info = in; | |
2615 | unsigned char *data = smi_info->curr_msg->data; | |
2616 | unsigned int size = smi_info->curr_msg->data_size; | |
2617 | if (size >= 8 && | |
2618 | (data[0]>>2) == STORAGE_NETFN && | |
2619 | data[1] == STORAGE_CMD_GET_SDR && | |
2620 | data[7] == 0x3A) { | |
2621 | return_hosed_msg_badsize(smi_info); | |
2622 | return NOTIFY_STOP; | |
2623 | } | |
2624 | return NOTIFY_DONE; | |
2625 | } | |
2626 | ||
2627 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
2628 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
2629 | }; | |
2630 | ||
2631 | /* | |
2632 | * setup_dell_poweredge_bt_xaction_handler | |
2633 | * @info - smi_info.device_id must be filled in already | |
2634 | * | |
2635 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
2636 | * when we know what function to use there. | |
2637 | */ | |
2638 | static void | |
2639 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
2640 | { | |
2641 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2642 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
2643 | smi_info->si_type == SI_BT) |
2644 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
2645 | } | |
2646 | ||
3ae0e0f9 CM |
2647 | /* |
2648 | * setup_oem_data_handler | |
2649 | * @info - smi_info.device_id must be filled in already | |
2650 | * | |
2651 | * Fills in smi_info.device_id.oem_data_available_handler | |
2652 | * when we know what function to use there. | |
2653 | */ | |
2654 | ||
2655 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
2656 | { | |
2657 | setup_dell_poweredge_oem_data_handler(smi_info); | |
2658 | } | |
2659 | ||
ea94027b CM |
2660 | static void setup_xaction_handlers(struct smi_info *smi_info) |
2661 | { | |
2662 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
2663 | } | |
2664 | ||
a9a2c44f CM |
2665 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
2666 | { | |
453823ba | 2667 | if (smi_info->intf) { |
c305e3d3 CM |
2668 | /* |
2669 | * The timer and thread are only running if the | |
2670 | * interface has been started up and registered. | |
2671 | */ | |
453823ba CM |
2672 | if (smi_info->thread != NULL) |
2673 | kthread_stop(smi_info->thread); | |
2674 | del_timer_sync(&smi_info->si_timer); | |
2675 | } | |
a9a2c44f CM |
2676 | } |
2677 | ||
7420884c | 2678 | static __devinitdata struct ipmi_default_vals |
b0defcdb CM |
2679 | { |
2680 | int type; | |
2681 | int port; | |
7420884c | 2682 | } ipmi_defaults[] = |
b0defcdb CM |
2683 | { |
2684 | { .type = SI_KCS, .port = 0xca2 }, | |
2685 | { .type = SI_SMIC, .port = 0xca9 }, | |
2686 | { .type = SI_BT, .port = 0xe4 }, | |
2687 | { .port = 0 } | |
2688 | }; | |
2689 | ||
2690 | static __devinit void default_find_bmc(void) | |
2691 | { | |
2692 | struct smi_info *info; | |
2693 | int i; | |
2694 | ||
2695 | for (i = 0; ; i++) { | |
2696 | if (!ipmi_defaults[i].port) | |
2697 | break; | |
4ff31d77 CK |
2698 | #ifdef CONFIG_PPC_MERGE |
2699 | if (check_legacy_ioport(ipmi_defaults[i].port)) | |
2700 | continue; | |
2701 | #endif | |
a09f4855 AM |
2702 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2703 | if (!info) | |
2704 | return; | |
4ff31d77 | 2705 | |
b0defcdb CM |
2706 | info->addr_source = NULL; |
2707 | ||
2708 | info->si_type = ipmi_defaults[i].type; | |
2709 | info->io_setup = port_setup; | |
2710 | info->io.addr_data = ipmi_defaults[i].port; | |
2711 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2712 | ||
2713 | info->io.addr = NULL; | |
2714 | info->io.regspacing = DEFAULT_REGSPACING; | |
2715 | info->io.regsize = DEFAULT_REGSPACING; | |
2716 | info->io.regshift = 0; | |
2717 | ||
2718 | if (try_smi_init(info) == 0) { | |
2719 | /* Found one... */ | |
2720 | printk(KERN_INFO "ipmi_si: Found default %s state" | |
2721 | " machine at %s address 0x%lx\n", | |
2722 | si_to_str[info->si_type], | |
2723 | addr_space_to_str[info->io.addr_type], | |
2724 | info->io.addr_data); | |
2725 | return; | |
2726 | } | |
2727 | } | |
2728 | } | |
2729 | ||
2730 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 2731 | { |
b0defcdb | 2732 | struct smi_info *e; |
1da177e4 | 2733 | |
b0defcdb CM |
2734 | list_for_each_entry(e, &smi_infos, link) { |
2735 | if (e->io.addr_type != info->io.addr_type) | |
2736 | continue; | |
2737 | if (e->io.addr_data == info->io.addr_data) | |
2738 | return 0; | |
2739 | } | |
1da177e4 | 2740 | |
b0defcdb CM |
2741 | return 1; |
2742 | } | |
1da177e4 | 2743 | |
b0defcdb CM |
2744 | static int try_smi_init(struct smi_info *new_smi) |
2745 | { | |
2746 | int rv; | |
64959e2d | 2747 | int i; |
b0defcdb CM |
2748 | |
2749 | if (new_smi->addr_source) { | |
2750 | printk(KERN_INFO "ipmi_si: Trying %s-specified %s state" | |
2751 | " machine at %s address 0x%lx, slave address 0x%x," | |
2752 | " irq %d\n", | |
2753 | new_smi->addr_source, | |
2754 | si_to_str[new_smi->si_type], | |
2755 | addr_space_to_str[new_smi->io.addr_type], | |
2756 | new_smi->io.addr_data, | |
2757 | new_smi->slave_addr, new_smi->irq); | |
2758 | } | |
2759 | ||
d6dfd131 | 2760 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
2761 | if (!is_new_interface(new_smi)) { |
2762 | printk(KERN_WARNING "ipmi_si: duplicate interface\n"); | |
2763 | rv = -EBUSY; | |
2764 | goto out_err; | |
2765 | } | |
1da177e4 LT |
2766 | |
2767 | /* So we know not to free it unless we have allocated one. */ | |
2768 | new_smi->intf = NULL; | |
2769 | new_smi->si_sm = NULL; | |
2770 | new_smi->handlers = NULL; | |
2771 | ||
b0defcdb CM |
2772 | switch (new_smi->si_type) { |
2773 | case SI_KCS: | |
1da177e4 | 2774 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
2775 | break; |
2776 | ||
2777 | case SI_SMIC: | |
1da177e4 | 2778 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
2779 | break; |
2780 | ||
2781 | case SI_BT: | |
1da177e4 | 2782 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
2783 | break; |
2784 | ||
2785 | default: | |
1da177e4 LT |
2786 | /* No support for anything else yet. */ |
2787 | rv = -EIO; | |
2788 | goto out_err; | |
2789 | } | |
2790 | ||
2791 | /* Allocate the state machine's data and initialize it. */ | |
2792 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 2793 | if (!new_smi->si_sm) { |
c305e3d3 | 2794 | printk(KERN_ERR "Could not allocate state machine memory\n"); |
1da177e4 LT |
2795 | rv = -ENOMEM; |
2796 | goto out_err; | |
2797 | } | |
2798 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
2799 | &new_smi->io); | |
2800 | ||
2801 | /* Now that we know the I/O size, we can set up the I/O. */ | |
2802 | rv = new_smi->io_setup(new_smi); | |
2803 | if (rv) { | |
c305e3d3 | 2804 | printk(KERN_ERR "Could not set up I/O space\n"); |
1da177e4 LT |
2805 | goto out_err; |
2806 | } | |
2807 | ||
2808 | spin_lock_init(&(new_smi->si_lock)); | |
2809 | spin_lock_init(&(new_smi->msg_lock)); | |
1da177e4 LT |
2810 | |
2811 | /* Do low-level detection first. */ | |
2812 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb CM |
2813 | if (new_smi->addr_source) |
2814 | printk(KERN_INFO "ipmi_si: Interface detection" | |
2815 | " failed\n"); | |
1da177e4 LT |
2816 | rv = -ENODEV; |
2817 | goto out_err; | |
2818 | } | |
2819 | ||
c305e3d3 CM |
2820 | /* |
2821 | * Attempt a get device id command. If it fails, we probably | |
2822 | * don't have a BMC here. | |
2823 | */ | |
1da177e4 | 2824 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
2825 | if (rv) { |
2826 | if (new_smi->addr_source) | |
2827 | printk(KERN_INFO "ipmi_si: There appears to be no BMC" | |
2828 | " at this location\n"); | |
1da177e4 | 2829 | goto out_err; |
b0defcdb | 2830 | } |
1da177e4 | 2831 | |
3ae0e0f9 | 2832 | setup_oem_data_handler(new_smi); |
ea94027b | 2833 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 2834 | |
1da177e4 LT |
2835 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); |
2836 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
2837 | new_smi->curr_msg = NULL; | |
2838 | atomic_set(&new_smi->req_events, 0); | |
2839 | new_smi->run_to_completion = 0; | |
64959e2d CM |
2840 | for (i = 0; i < SI_NUM_STATS; i++) |
2841 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 LT |
2842 | |
2843 | new_smi->interrupt_disabled = 0; | |
a9a2c44f | 2844 | atomic_set(&new_smi->stop_operation, 0); |
b0defcdb CM |
2845 | new_smi->intf_num = smi_num; |
2846 | smi_num++; | |
1da177e4 | 2847 | |
c305e3d3 CM |
2848 | /* |
2849 | * Start clearing the flags before we enable interrupts or the | |
2850 | * timer to avoid racing with the timer. | |
2851 | */ | |
1da177e4 LT |
2852 | start_clear_flags(new_smi); |
2853 | /* IRQ is defined to be set when non-zero. */ | |
2854 | if (new_smi->irq) | |
2855 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
2856 | ||
50c812b2 | 2857 | if (!new_smi->dev) { |
c305e3d3 CM |
2858 | /* |
2859 | * If we don't already have a device from something | |
2860 | * else (like PCI), then register a new one. | |
2861 | */ | |
50c812b2 CM |
2862 | new_smi->pdev = platform_device_alloc("ipmi_si", |
2863 | new_smi->intf_num); | |
2864 | if (rv) { | |
2865 | printk(KERN_ERR | |
2866 | "ipmi_si_intf:" | |
2867 | " Unable to allocate platform device\n"); | |
453823ba | 2868 | goto out_err; |
50c812b2 CM |
2869 | } |
2870 | new_smi->dev = &new_smi->pdev->dev; | |
2871 | new_smi->dev->driver = &ipmi_driver; | |
2872 | ||
b48f5457 | 2873 | rv = platform_device_add(new_smi->pdev); |
50c812b2 CM |
2874 | if (rv) { |
2875 | printk(KERN_ERR | |
2876 | "ipmi_si_intf:" | |
2877 | " Unable to register system interface device:" | |
2878 | " %d\n", | |
2879 | rv); | |
453823ba | 2880 | goto out_err; |
50c812b2 CM |
2881 | } |
2882 | new_smi->dev_registered = 1; | |
2883 | } | |
2884 | ||
1da177e4 LT |
2885 | rv = ipmi_register_smi(&handlers, |
2886 | new_smi, | |
50c812b2 CM |
2887 | &new_smi->device_id, |
2888 | new_smi->dev, | |
759643b8 | 2889 | "bmc", |
453823ba | 2890 | new_smi->slave_addr); |
1da177e4 LT |
2891 | if (rv) { |
2892 | printk(KERN_ERR | |
2893 | "ipmi_si: Unable to register device: error %d\n", | |
2894 | rv); | |
2895 | goto out_err_stop_timer; | |
2896 | } | |
2897 | ||
2898 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
fa68be0d | 2899 | type_file_read_proc, |
1da177e4 LT |
2900 | new_smi, THIS_MODULE); |
2901 | if (rv) { | |
2902 | printk(KERN_ERR | |
2903 | "ipmi_si: Unable to create proc entry: %d\n", | |
2904 | rv); | |
2905 | goto out_err_stop_timer; | |
2906 | } | |
2907 | ||
2908 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
fa68be0d | 2909 | stat_file_read_proc, |
1da177e4 LT |
2910 | new_smi, THIS_MODULE); |
2911 | if (rv) { | |
2912 | printk(KERN_ERR | |
2913 | "ipmi_si: Unable to create proc entry: %d\n", | |
2914 | rv); | |
2915 | goto out_err_stop_timer; | |
2916 | } | |
2917 | ||
b361e27b | 2918 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
fa68be0d | 2919 | param_read_proc, |
b361e27b CM |
2920 | new_smi, THIS_MODULE); |
2921 | if (rv) { | |
2922 | printk(KERN_ERR | |
2923 | "ipmi_si: Unable to create proc entry: %d\n", | |
2924 | rv); | |
2925 | goto out_err_stop_timer; | |
2926 | } | |
2927 | ||
b0defcdb CM |
2928 | list_add_tail(&new_smi->link, &smi_infos); |
2929 | ||
d6dfd131 | 2930 | mutex_unlock(&smi_infos_lock); |
1da177e4 | 2931 | |
c305e3d3 CM |
2932 | printk(KERN_INFO "IPMI %s interface initialized\n", |
2933 | si_to_str[new_smi->si_type]); | |
1da177e4 LT |
2934 | |
2935 | return 0; | |
2936 | ||
2937 | out_err_stop_timer: | |
a9a2c44f CM |
2938 | atomic_inc(&new_smi->stop_operation); |
2939 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
2940 | |
2941 | out_err: | |
2942 | if (new_smi->intf) | |
2943 | ipmi_unregister_smi(new_smi->intf); | |
2944 | ||
b0defcdb CM |
2945 | if (new_smi->irq_cleanup) |
2946 | new_smi->irq_cleanup(new_smi); | |
1da177e4 | 2947 | |
c305e3d3 CM |
2948 | /* |
2949 | * Wait until we know that we are out of any interrupt | |
2950 | * handlers might have been running before we freed the | |
2951 | * interrupt. | |
2952 | */ | |
fbd568a3 | 2953 | synchronize_sched(); |
1da177e4 LT |
2954 | |
2955 | if (new_smi->si_sm) { | |
2956 | if (new_smi->handlers) | |
2957 | new_smi->handlers->cleanup(new_smi->si_sm); | |
2958 | kfree(new_smi->si_sm); | |
2959 | } | |
b0defcdb CM |
2960 | if (new_smi->addr_source_cleanup) |
2961 | new_smi->addr_source_cleanup(new_smi); | |
7767e126 PG |
2962 | if (new_smi->io_cleanup) |
2963 | new_smi->io_cleanup(new_smi); | |
1da177e4 | 2964 | |
50c812b2 CM |
2965 | if (new_smi->dev_registered) |
2966 | platform_device_unregister(new_smi->pdev); | |
2967 | ||
2968 | kfree(new_smi); | |
2969 | ||
d6dfd131 | 2970 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 2971 | |
1da177e4 LT |
2972 | return rv; |
2973 | } | |
2974 | ||
b0defcdb | 2975 | static __devinit int init_ipmi_si(void) |
1da177e4 | 2976 | { |
1da177e4 LT |
2977 | int i; |
2978 | char *str; | |
50c812b2 | 2979 | int rv; |
1da177e4 LT |
2980 | |
2981 | if (initialized) | |
2982 | return 0; | |
2983 | initialized = 1; | |
2984 | ||
50c812b2 CM |
2985 | /* Register the device drivers. */ |
2986 | rv = driver_register(&ipmi_driver); | |
2987 | if (rv) { | |
2988 | printk(KERN_ERR | |
2989 | "init_ipmi_si: Unable to register driver: %d\n", | |
2990 | rv); | |
2991 | return rv; | |
2992 | } | |
2993 | ||
2994 | ||
1da177e4 LT |
2995 | /* Parse out the si_type string into its components. */ |
2996 | str = si_type_str; | |
2997 | if (*str != '\0') { | |
e8b33617 | 2998 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
2999 | si_type[i] = str; |
3000 | str = strchr(str, ','); | |
3001 | if (str) { | |
3002 | *str = '\0'; | |
3003 | str++; | |
3004 | } else { | |
3005 | break; | |
3006 | } | |
3007 | } | |
3008 | } | |
3009 | ||
1fdd75bd | 3010 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 3011 | |
b0defcdb CM |
3012 | hardcode_find_bmc(); |
3013 | ||
a9fad4cc | 3014 | #ifdef CONFIG_DMI |
b224cd3a | 3015 | dmi_find_bmc(); |
1da177e4 LT |
3016 | #endif |
3017 | ||
b0defcdb | 3018 | #ifdef CONFIG_ACPI |
1d5636cc | 3019 | acpi_find_bmc(); |
b0defcdb | 3020 | #endif |
1da177e4 | 3021 | |
b0defcdb | 3022 | #ifdef CONFIG_PCI |
168b35a7 | 3023 | rv = pci_register_driver(&ipmi_pci_driver); |
c305e3d3 | 3024 | if (rv) |
168b35a7 CM |
3025 | printk(KERN_ERR |
3026 | "init_ipmi_si: Unable to register PCI driver: %d\n", | |
3027 | rv); | |
b0defcdb CM |
3028 | #endif |
3029 | ||
dba9b4f6 CM |
3030 | #ifdef CONFIG_PPC_OF |
3031 | of_register_platform_driver(&ipmi_of_platform_driver); | |
3032 | #endif | |
3033 | ||
b0defcdb | 3034 | if (si_trydefaults) { |
d6dfd131 | 3035 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3036 | if (list_empty(&smi_infos)) { |
3037 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 3038 | mutex_unlock(&smi_infos_lock); |
b0defcdb CM |
3039 | default_find_bmc(); |
3040 | } else { | |
d6dfd131 | 3041 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3042 | } |
1da177e4 LT |
3043 | } |
3044 | ||
d6dfd131 | 3045 | mutex_lock(&smi_infos_lock); |
b361e27b | 3046 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 3047 | mutex_unlock(&smi_infos_lock); |
b0defcdb CM |
3048 | #ifdef CONFIG_PCI |
3049 | pci_unregister_driver(&ipmi_pci_driver); | |
3050 | #endif | |
10fb62e5 CK |
3051 | |
3052 | #ifdef CONFIG_PPC_OF | |
3053 | of_unregister_platform_driver(&ipmi_of_platform_driver); | |
3054 | #endif | |
55ebcc38 | 3055 | driver_unregister(&ipmi_driver); |
c305e3d3 CM |
3056 | printk(KERN_WARNING |
3057 | "ipmi_si: Unable to find any System Interface(s)\n"); | |
1da177e4 | 3058 | return -ENODEV; |
b0defcdb | 3059 | } else { |
d6dfd131 | 3060 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3061 | return 0; |
1da177e4 | 3062 | } |
1da177e4 LT |
3063 | } |
3064 | module_init(init_ipmi_si); | |
3065 | ||
b361e27b | 3066 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 LT |
3067 | { |
3068 | int rv; | |
3069 | unsigned long flags; | |
3070 | ||
b0defcdb | 3071 | if (!to_clean) |
1da177e4 LT |
3072 | return; |
3073 | ||
b0defcdb CM |
3074 | list_del(&to_clean->link); |
3075 | ||
ee6cd5f8 | 3076 | /* Tell the driver that we are shutting down. */ |
a9a2c44f | 3077 | atomic_inc(&to_clean->stop_operation); |
b0defcdb | 3078 | |
c305e3d3 CM |
3079 | /* |
3080 | * Make sure the timer and thread are stopped and will not run | |
3081 | * again. | |
3082 | */ | |
a9a2c44f | 3083 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 3084 | |
c305e3d3 CM |
3085 | /* |
3086 | * Timeouts are stopped, now make sure the interrupts are off | |
3087 | * for the device. A little tricky with locks to make sure | |
3088 | * there are no races. | |
3089 | */ | |
ee6cd5f8 CM |
3090 | spin_lock_irqsave(&to_clean->si_lock, flags); |
3091 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3092 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3093 | poll(to_clean); | |
3094 | schedule_timeout_uninterruptible(1); | |
3095 | spin_lock_irqsave(&to_clean->si_lock, flags); | |
3096 | } | |
3097 | disable_si_irq(to_clean); | |
3098 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3099 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3100 | poll(to_clean); | |
3101 | schedule_timeout_uninterruptible(1); | |
3102 | } | |
3103 | ||
3104 | /* Clean up interrupts and make sure that everything is done. */ | |
3105 | if (to_clean->irq_cleanup) | |
3106 | to_clean->irq_cleanup(to_clean); | |
e8b33617 | 3107 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 3108 | poll(to_clean); |
da4cd8df | 3109 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
3110 | } |
3111 | ||
3112 | rv = ipmi_unregister_smi(to_clean->intf); | |
3113 | if (rv) { | |
3114 | printk(KERN_ERR | |
3115 | "ipmi_si: Unable to unregister device: errno=%d\n", | |
3116 | rv); | |
3117 | } | |
3118 | ||
3119 | to_clean->handlers->cleanup(to_clean->si_sm); | |
3120 | ||
3121 | kfree(to_clean->si_sm); | |
3122 | ||
b0defcdb CM |
3123 | if (to_clean->addr_source_cleanup) |
3124 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
3125 | if (to_clean->io_cleanup) |
3126 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
3127 | |
3128 | if (to_clean->dev_registered) | |
3129 | platform_device_unregister(to_clean->pdev); | |
3130 | ||
3131 | kfree(to_clean); | |
1da177e4 LT |
3132 | } |
3133 | ||
3134 | static __exit void cleanup_ipmi_si(void) | |
3135 | { | |
b0defcdb | 3136 | struct smi_info *e, *tmp_e; |
1da177e4 | 3137 | |
b0defcdb | 3138 | if (!initialized) |
1da177e4 LT |
3139 | return; |
3140 | ||
b0defcdb CM |
3141 | #ifdef CONFIG_PCI |
3142 | pci_unregister_driver(&ipmi_pci_driver); | |
3143 | #endif | |
3144 | ||
dba9b4f6 CM |
3145 | #ifdef CONFIG_PPC_OF |
3146 | of_unregister_platform_driver(&ipmi_of_platform_driver); | |
3147 | #endif | |
3148 | ||
d6dfd131 | 3149 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3150 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
3151 | cleanup_one_si(e); | |
d6dfd131 | 3152 | mutex_unlock(&smi_infos_lock); |
50c812b2 CM |
3153 | |
3154 | driver_unregister(&ipmi_driver); | |
1da177e4 LT |
3155 | } |
3156 | module_exit(cleanup_ipmi_si); | |
3157 | ||
3158 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 3159 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
3160 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
3161 | " system interfaces."); |