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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ipmi_si.c | |
3 | * | |
4 | * The interface to the IPMI driver for the system interfaces (KCS, SMIC, | |
5 | * BT). | |
6 | * | |
7 | * Author: MontaVista Software, Inc. | |
8 | * Corey Minyard <minyard@mvista.com> | |
9 | * source@mvista.com | |
10 | * | |
11 | * Copyright 2002 MontaVista Software Inc. | |
dba9b4f6 | 12 | * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com> |
1da177e4 LT |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify it | |
15 | * under the terms of the GNU General Public License as published by the | |
16 | * Free Software Foundation; either version 2 of the License, or (at your | |
17 | * option) any later version. | |
18 | * | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
21 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
22 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
25 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
26 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
27 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
28 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
29 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License along | |
32 | * with this program; if not, write to the Free Software Foundation, Inc., | |
33 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * This file holds the "policy" for the interface to the SMI state | |
38 | * machine. It does the configuration, handles timers and interrupts, | |
39 | * and drives the real SMI state machine. | |
40 | */ | |
41 | ||
1da177e4 LT |
42 | #include <linux/module.h> |
43 | #include <linux/moduleparam.h> | |
44 | #include <asm/system.h> | |
45 | #include <linux/sched.h> | |
46 | #include <linux/timer.h> | |
47 | #include <linux/errno.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/ioport.h> | |
ea94027b | 54 | #include <linux/notifier.h> |
b0defcdb | 55 | #include <linux/mutex.h> |
e9a705a0 | 56 | #include <linux/kthread.h> |
1da177e4 | 57 | #include <asm/irq.h> |
1da177e4 LT |
58 | #include <linux/interrupt.h> |
59 | #include <linux/rcupdate.h> | |
60 | #include <linux/ipmi_smi.h> | |
61 | #include <asm/io.h> | |
62 | #include "ipmi_si_sm.h" | |
63 | #include <linux/init.h> | |
b224cd3a | 64 | #include <linux/dmi.h> |
b361e27b CM |
65 | #include <linux/string.h> |
66 | #include <linux/ctype.h> | |
9e368fa0 | 67 | #include <linux/pnp.h> |
b361e27b | 68 | |
dba9b4f6 | 69 | #ifdef CONFIG_PPC_OF |
11c675ce SR |
70 | #include <linux/of_device.h> |
71 | #include <linux/of_platform.h> | |
dba9b4f6 CM |
72 | #endif |
73 | ||
b361e27b | 74 | #define PFX "ipmi_si: " |
1da177e4 LT |
75 | |
76 | /* Measure times between events in the driver. */ | |
77 | #undef DEBUG_TIMING | |
78 | ||
79 | /* Call every 10 ms. */ | |
80 | #define SI_TIMEOUT_TIME_USEC 10000 | |
81 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
82 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
83 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
c305e3d3 | 84 | short timeout */ |
1da177e4 LT |
85 | |
86 | enum si_intf_state { | |
87 | SI_NORMAL, | |
88 | SI_GETTING_FLAGS, | |
89 | SI_GETTING_EVENTS, | |
90 | SI_CLEARING_FLAGS, | |
91 | SI_CLEARING_FLAGS_THEN_SET_IRQ, | |
92 | SI_GETTING_MESSAGES, | |
93 | SI_ENABLE_INTERRUPTS1, | |
ee6cd5f8 CM |
94 | SI_ENABLE_INTERRUPTS2, |
95 | SI_DISABLE_INTERRUPTS1, | |
96 | SI_DISABLE_INTERRUPTS2 | |
1da177e4 LT |
97 | /* FIXME - add watchdog stuff. */ |
98 | }; | |
99 | ||
9dbf68f9 CM |
100 | /* Some BT-specific defines we need here. */ |
101 | #define IPMI_BT_INTMASK_REG 2 | |
102 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
103 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
104 | ||
1da177e4 LT |
105 | enum si_type { |
106 | SI_KCS, SI_SMIC, SI_BT | |
107 | }; | |
b361e27b | 108 | static char *si_to_str[] = { "kcs", "smic", "bt" }; |
1da177e4 | 109 | |
50c812b2 CM |
110 | #define DEVICE_NAME "ipmi_si" |
111 | ||
fe2d5ffc DW |
112 | static struct platform_driver ipmi_driver = { |
113 | .driver = { | |
114 | .name = DEVICE_NAME, | |
115 | .bus = &platform_bus_type | |
116 | } | |
50c812b2 | 117 | }; |
3ae0e0f9 | 118 | |
64959e2d CM |
119 | |
120 | /* | |
121 | * Indexes into stats[] in smi_info below. | |
122 | */ | |
ba8ff1c6 CM |
123 | enum si_stat_indexes { |
124 | /* | |
125 | * Number of times the driver requested a timer while an operation | |
126 | * was in progress. | |
127 | */ | |
128 | SI_STAT_short_timeouts = 0, | |
129 | ||
130 | /* | |
131 | * Number of times the driver requested a timer while nothing was in | |
132 | * progress. | |
133 | */ | |
134 | SI_STAT_long_timeouts, | |
135 | ||
136 | /* Number of times the interface was idle while being polled. */ | |
137 | SI_STAT_idles, | |
138 | ||
139 | /* Number of interrupts the driver handled. */ | |
140 | SI_STAT_interrupts, | |
141 | ||
142 | /* Number of time the driver got an ATTN from the hardware. */ | |
143 | SI_STAT_attentions, | |
64959e2d | 144 | |
ba8ff1c6 CM |
145 | /* Number of times the driver requested flags from the hardware. */ |
146 | SI_STAT_flag_fetches, | |
147 | ||
148 | /* Number of times the hardware didn't follow the state machine. */ | |
149 | SI_STAT_hosed_count, | |
150 | ||
151 | /* Number of completed messages. */ | |
152 | SI_STAT_complete_transactions, | |
153 | ||
154 | /* Number of IPMI events received from the hardware. */ | |
155 | SI_STAT_events, | |
156 | ||
157 | /* Number of watchdog pretimeouts. */ | |
158 | SI_STAT_watchdog_pretimeouts, | |
159 | ||
160 | /* Number of asyncronous messages received. */ | |
161 | SI_STAT_incoming_messages, | |
162 | ||
163 | ||
164 | /* This *must* remain last, add new values above this. */ | |
165 | SI_NUM_STATS | |
166 | }; | |
64959e2d | 167 | |
c305e3d3 | 168 | struct smi_info { |
a9a2c44f | 169 | int intf_num; |
1da177e4 LT |
170 | ipmi_smi_t intf; |
171 | struct si_sm_data *si_sm; | |
172 | struct si_sm_handlers *handlers; | |
173 | enum si_type si_type; | |
174 | spinlock_t si_lock; | |
175 | spinlock_t msg_lock; | |
176 | struct list_head xmit_msgs; | |
177 | struct list_head hp_xmit_msgs; | |
178 | struct ipmi_smi_msg *curr_msg; | |
179 | enum si_intf_state si_state; | |
180 | ||
c305e3d3 CM |
181 | /* |
182 | * Used to handle the various types of I/O that can occur with | |
183 | * IPMI | |
184 | */ | |
1da177e4 LT |
185 | struct si_sm_io io; |
186 | int (*io_setup)(struct smi_info *info); | |
187 | void (*io_cleanup)(struct smi_info *info); | |
188 | int (*irq_setup)(struct smi_info *info); | |
189 | void (*irq_cleanup)(struct smi_info *info); | |
190 | unsigned int io_size; | |
b0defcdb CM |
191 | char *addr_source; /* ACPI, PCI, SMBIOS, hardcode, default. */ |
192 | void (*addr_source_cleanup)(struct smi_info *info); | |
193 | void *addr_source_data; | |
1da177e4 | 194 | |
c305e3d3 CM |
195 | /* |
196 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
197 | * when handle_flags() needs to be re-run or 0 indicating it | |
198 | * set si_state itself. | |
199 | */ | |
3ae0e0f9 CM |
200 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
201 | ||
c305e3d3 CM |
202 | /* |
203 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
204 | * is set to hold the flags until we are done handling everything | |
205 | * from the flags. | |
206 | */ | |
1da177e4 LT |
207 | #define RECEIVE_MSG_AVAIL 0x01 |
208 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
209 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
210 | #define OEM0_DATA_AVAIL 0x20 |
211 | #define OEM1_DATA_AVAIL 0x40 | |
212 | #define OEM2_DATA_AVAIL 0x80 | |
213 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
214 | OEM1_DATA_AVAIL | \ |
215 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
216 | unsigned char msg_flags; |
217 | ||
40112ae7 CM |
218 | /* Does the BMC have an event buffer? */ |
219 | char has_event_buffer; | |
220 | ||
c305e3d3 CM |
221 | /* |
222 | * If set to true, this will request events the next time the | |
223 | * state machine is idle. | |
224 | */ | |
1da177e4 LT |
225 | atomic_t req_events; |
226 | ||
c305e3d3 CM |
227 | /* |
228 | * If true, run the state machine to completion on every send | |
229 | * call. Generally used after a panic to make sure stuff goes | |
230 | * out. | |
231 | */ | |
1da177e4 LT |
232 | int run_to_completion; |
233 | ||
234 | /* The I/O port of an SI interface. */ | |
235 | int port; | |
236 | ||
c305e3d3 CM |
237 | /* |
238 | * The space between start addresses of the two ports. For | |
239 | * instance, if the first port is 0xca2 and the spacing is 4, then | |
240 | * the second port is 0xca6. | |
241 | */ | |
1da177e4 LT |
242 | unsigned int spacing; |
243 | ||
244 | /* zero if no irq; */ | |
245 | int irq; | |
246 | ||
247 | /* The timer for this si. */ | |
248 | struct timer_list si_timer; | |
249 | ||
250 | /* The time (in jiffies) the last timeout occurred at. */ | |
251 | unsigned long last_timeout_jiffies; | |
252 | ||
253 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 254 | atomic_t stop_operation; |
1da177e4 | 255 | |
c305e3d3 CM |
256 | /* |
257 | * The driver will disable interrupts when it gets into a | |
258 | * situation where it cannot handle messages due to lack of | |
259 | * memory. Once that situation clears up, it will re-enable | |
260 | * interrupts. | |
261 | */ | |
1da177e4 LT |
262 | int interrupt_disabled; |
263 | ||
50c812b2 | 264 | /* From the get device id response... */ |
3ae0e0f9 | 265 | struct ipmi_device_id device_id; |
1da177e4 | 266 | |
50c812b2 CM |
267 | /* Driver model stuff. */ |
268 | struct device *dev; | |
269 | struct platform_device *pdev; | |
270 | ||
c305e3d3 CM |
271 | /* |
272 | * True if we allocated the device, false if it came from | |
273 | * someplace else (like PCI). | |
274 | */ | |
50c812b2 CM |
275 | int dev_registered; |
276 | ||
1da177e4 LT |
277 | /* Slave address, could be reported from DMI. */ |
278 | unsigned char slave_addr; | |
279 | ||
280 | /* Counters and things for the proc filesystem. */ | |
64959e2d | 281 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 282 | |
c305e3d3 | 283 | struct task_struct *thread; |
b0defcdb CM |
284 | |
285 | struct list_head link; | |
1da177e4 LT |
286 | }; |
287 | ||
64959e2d CM |
288 | #define smi_inc_stat(smi, stat) \ |
289 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
290 | #define smi_get_stat(smi, stat) \ | |
291 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
292 | ||
a51f4a81 CM |
293 | #define SI_MAX_PARMS 4 |
294 | ||
295 | static int force_kipmid[SI_MAX_PARMS]; | |
296 | static int num_force_kipmid; | |
297 | ||
ae74e823 MW |
298 | static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; |
299 | static int num_max_busy_us; | |
300 | ||
b361e27b CM |
301 | static int unload_when_empty = 1; |
302 | ||
b0defcdb | 303 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 304 | static void cleanup_one_si(struct smi_info *to_clean); |
b0defcdb | 305 | |
e041c683 | 306 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 307 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 308 | { |
e041c683 | 309 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
310 | } |
311 | ||
1da177e4 LT |
312 | static void deliver_recv_msg(struct smi_info *smi_info, |
313 | struct ipmi_smi_msg *msg) | |
314 | { | |
315 | /* Deliver the message to the upper layer with the lock | |
c305e3d3 | 316 | released. */ |
1da177e4 LT |
317 | spin_unlock(&(smi_info->si_lock)); |
318 | ipmi_smi_msg_received(smi_info->intf, msg); | |
319 | spin_lock(&(smi_info->si_lock)); | |
320 | } | |
321 | ||
4d7cbac7 | 322 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
323 | { |
324 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
325 | ||
4d7cbac7 CM |
326 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
327 | cCode = IPMI_ERR_UNSPECIFIED; | |
328 | /* else use it as is */ | |
329 | ||
1da177e4 LT |
330 | /* Make it a reponse */ |
331 | msg->rsp[0] = msg->data[0] | 4; | |
332 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 333 | msg->rsp[2] = cCode; |
1da177e4 LT |
334 | msg->rsp_size = 3; |
335 | ||
336 | smi_info->curr_msg = NULL; | |
337 | deliver_recv_msg(smi_info, msg); | |
338 | } | |
339 | ||
340 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
341 | { | |
342 | int rv; | |
343 | struct list_head *entry = NULL; | |
344 | #ifdef DEBUG_TIMING | |
345 | struct timeval t; | |
346 | #endif | |
347 | ||
c305e3d3 CM |
348 | /* |
349 | * No need to save flags, we aleady have interrupts off and we | |
350 | * already hold the SMI lock. | |
351 | */ | |
5956dce1 KB |
352 | if (!smi_info->run_to_completion) |
353 | spin_lock(&(smi_info->msg_lock)); | |
1da177e4 LT |
354 | |
355 | /* Pick the high priority queue first. */ | |
b0defcdb | 356 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 357 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 358 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
359 | entry = smi_info->xmit_msgs.next; |
360 | } | |
361 | ||
b0defcdb | 362 | if (!entry) { |
1da177e4 LT |
363 | smi_info->curr_msg = NULL; |
364 | rv = SI_SM_IDLE; | |
365 | } else { | |
366 | int err; | |
367 | ||
368 | list_del(entry); | |
369 | smi_info->curr_msg = list_entry(entry, | |
370 | struct ipmi_smi_msg, | |
371 | link); | |
372 | #ifdef DEBUG_TIMING | |
373 | do_gettimeofday(&t); | |
c305e3d3 | 374 | printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 | 375 | #endif |
e041c683 AS |
376 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
377 | 0, smi_info); | |
ea94027b CM |
378 | if (err & NOTIFY_STOP_MASK) { |
379 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
380 | goto out; | |
381 | } | |
1da177e4 LT |
382 | err = smi_info->handlers->start_transaction( |
383 | smi_info->si_sm, | |
384 | smi_info->curr_msg->data, | |
385 | smi_info->curr_msg->data_size); | |
c305e3d3 | 386 | if (err) |
4d7cbac7 | 387 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
388 | |
389 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
390 | } | |
c305e3d3 | 391 | out: |
5956dce1 KB |
392 | if (!smi_info->run_to_completion) |
393 | spin_unlock(&(smi_info->msg_lock)); | |
1da177e4 LT |
394 | |
395 | return rv; | |
396 | } | |
397 | ||
398 | static void start_enable_irq(struct smi_info *smi_info) | |
399 | { | |
400 | unsigned char msg[2]; | |
401 | ||
c305e3d3 CM |
402 | /* |
403 | * If we are enabling interrupts, we have to tell the | |
404 | * BMC to use them. | |
405 | */ | |
1da177e4 LT |
406 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
407 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
408 | ||
409 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
410 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
411 | } | |
412 | ||
ee6cd5f8 CM |
413 | static void start_disable_irq(struct smi_info *smi_info) |
414 | { | |
415 | unsigned char msg[2]; | |
416 | ||
417 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
418 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
419 | ||
420 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
421 | smi_info->si_state = SI_DISABLE_INTERRUPTS1; | |
422 | } | |
423 | ||
1da177e4 LT |
424 | static void start_clear_flags(struct smi_info *smi_info) |
425 | { | |
426 | unsigned char msg[3]; | |
427 | ||
428 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
429 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
430 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
431 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
432 | ||
433 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
434 | smi_info->si_state = SI_CLEARING_FLAGS; | |
435 | } | |
436 | ||
c305e3d3 CM |
437 | /* |
438 | * When we have a situtaion where we run out of memory and cannot | |
439 | * allocate messages, we just leave them in the BMC and run the system | |
440 | * polled until we can allocate some memory. Once we have some | |
441 | * memory, we will re-enable the interrupt. | |
442 | */ | |
1da177e4 LT |
443 | static inline void disable_si_irq(struct smi_info *smi_info) |
444 | { | |
b0defcdb | 445 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
ee6cd5f8 | 446 | start_disable_irq(smi_info); |
1da177e4 LT |
447 | smi_info->interrupt_disabled = 1; |
448 | } | |
449 | } | |
450 | ||
451 | static inline void enable_si_irq(struct smi_info *smi_info) | |
452 | { | |
453 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
ee6cd5f8 | 454 | start_enable_irq(smi_info); |
1da177e4 LT |
455 | smi_info->interrupt_disabled = 0; |
456 | } | |
457 | } | |
458 | ||
459 | static void handle_flags(struct smi_info *smi_info) | |
460 | { | |
3ae0e0f9 | 461 | retry: |
1da177e4 LT |
462 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
463 | /* Watchdog pre-timeout */ | |
64959e2d | 464 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 LT |
465 | |
466 | start_clear_flags(smi_info); | |
467 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
468 | spin_unlock(&(smi_info->si_lock)); | |
469 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
470 | spin_lock(&(smi_info->si_lock)); | |
471 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { | |
472 | /* Messages available. */ | |
473 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 474 | if (!smi_info->curr_msg) { |
1da177e4 LT |
475 | disable_si_irq(smi_info); |
476 | smi_info->si_state = SI_NORMAL; | |
477 | return; | |
478 | } | |
479 | enable_si_irq(smi_info); | |
480 | ||
481 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
482 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
483 | smi_info->curr_msg->data_size = 2; | |
484 | ||
485 | smi_info->handlers->start_transaction( | |
486 | smi_info->si_sm, | |
487 | smi_info->curr_msg->data, | |
488 | smi_info->curr_msg->data_size); | |
489 | smi_info->si_state = SI_GETTING_MESSAGES; | |
490 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
491 | /* Events available. */ | |
492 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 493 | if (!smi_info->curr_msg) { |
1da177e4 LT |
494 | disable_si_irq(smi_info); |
495 | smi_info->si_state = SI_NORMAL; | |
496 | return; | |
497 | } | |
498 | enable_si_irq(smi_info); | |
499 | ||
500 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
501 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
502 | smi_info->curr_msg->data_size = 2; | |
503 | ||
504 | smi_info->handlers->start_transaction( | |
505 | smi_info->si_sm, | |
506 | smi_info->curr_msg->data, | |
507 | smi_info->curr_msg->data_size); | |
508 | smi_info->si_state = SI_GETTING_EVENTS; | |
4064d5ef | 509 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 510 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
511 | if (smi_info->oem_data_avail_handler(smi_info)) |
512 | goto retry; | |
c305e3d3 | 513 | } else |
1da177e4 | 514 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
515 | } |
516 | ||
517 | static void handle_transaction_done(struct smi_info *smi_info) | |
518 | { | |
519 | struct ipmi_smi_msg *msg; | |
520 | #ifdef DEBUG_TIMING | |
521 | struct timeval t; | |
522 | ||
523 | do_gettimeofday(&t); | |
c305e3d3 | 524 | printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
525 | #endif |
526 | switch (smi_info->si_state) { | |
527 | case SI_NORMAL: | |
b0defcdb | 528 | if (!smi_info->curr_msg) |
1da177e4 LT |
529 | break; |
530 | ||
531 | smi_info->curr_msg->rsp_size | |
532 | = smi_info->handlers->get_result( | |
533 | smi_info->si_sm, | |
534 | smi_info->curr_msg->rsp, | |
535 | IPMI_MAX_MSG_LENGTH); | |
536 | ||
c305e3d3 CM |
537 | /* |
538 | * Do this here becase deliver_recv_msg() releases the | |
539 | * lock, and a new message can be put in during the | |
540 | * time the lock is released. | |
541 | */ | |
1da177e4 LT |
542 | msg = smi_info->curr_msg; |
543 | smi_info->curr_msg = NULL; | |
544 | deliver_recv_msg(smi_info, msg); | |
545 | break; | |
546 | ||
547 | case SI_GETTING_FLAGS: | |
548 | { | |
549 | unsigned char msg[4]; | |
550 | unsigned int len; | |
551 | ||
552 | /* We got the flags from the SMI, now handle them. */ | |
553 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
554 | if (msg[2] != 0) { | |
c305e3d3 | 555 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
556 | smi_info->si_state = SI_NORMAL; |
557 | } else if (len < 4) { | |
c305e3d3 CM |
558 | /* |
559 | * Hmm, no flags. That's technically illegal, but | |
560 | * don't use uninitialized data. | |
561 | */ | |
1da177e4 LT |
562 | smi_info->si_state = SI_NORMAL; |
563 | } else { | |
564 | smi_info->msg_flags = msg[3]; | |
565 | handle_flags(smi_info); | |
566 | } | |
567 | break; | |
568 | } | |
569 | ||
570 | case SI_CLEARING_FLAGS: | |
571 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
572 | { | |
573 | unsigned char msg[3]; | |
574 | ||
575 | /* We cleared the flags. */ | |
576 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
577 | if (msg[2] != 0) { | |
578 | /* Error clearing flags */ | |
579 | printk(KERN_WARNING | |
580 | "ipmi_si: Error clearing flags: %2.2x\n", | |
581 | msg[2]); | |
582 | } | |
583 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
584 | start_enable_irq(smi_info); | |
585 | else | |
586 | smi_info->si_state = SI_NORMAL; | |
587 | break; | |
588 | } | |
589 | ||
590 | case SI_GETTING_EVENTS: | |
591 | { | |
592 | smi_info->curr_msg->rsp_size | |
593 | = smi_info->handlers->get_result( | |
594 | smi_info->si_sm, | |
595 | smi_info->curr_msg->rsp, | |
596 | IPMI_MAX_MSG_LENGTH); | |
597 | ||
c305e3d3 CM |
598 | /* |
599 | * Do this here becase deliver_recv_msg() releases the | |
600 | * lock, and a new message can be put in during the | |
601 | * time the lock is released. | |
602 | */ | |
1da177e4 LT |
603 | msg = smi_info->curr_msg; |
604 | smi_info->curr_msg = NULL; | |
605 | if (msg->rsp[2] != 0) { | |
606 | /* Error getting event, probably done. */ | |
607 | msg->done(msg); | |
608 | ||
609 | /* Take off the event flag. */ | |
610 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
611 | handle_flags(smi_info); | |
612 | } else { | |
64959e2d | 613 | smi_inc_stat(smi_info, events); |
1da177e4 | 614 | |
c305e3d3 CM |
615 | /* |
616 | * Do this before we deliver the message | |
617 | * because delivering the message releases the | |
618 | * lock and something else can mess with the | |
619 | * state. | |
620 | */ | |
1da177e4 LT |
621 | handle_flags(smi_info); |
622 | ||
623 | deliver_recv_msg(smi_info, msg); | |
624 | } | |
625 | break; | |
626 | } | |
627 | ||
628 | case SI_GETTING_MESSAGES: | |
629 | { | |
630 | smi_info->curr_msg->rsp_size | |
631 | = smi_info->handlers->get_result( | |
632 | smi_info->si_sm, | |
633 | smi_info->curr_msg->rsp, | |
634 | IPMI_MAX_MSG_LENGTH); | |
635 | ||
c305e3d3 CM |
636 | /* |
637 | * Do this here becase deliver_recv_msg() releases the | |
638 | * lock, and a new message can be put in during the | |
639 | * time the lock is released. | |
640 | */ | |
1da177e4 LT |
641 | msg = smi_info->curr_msg; |
642 | smi_info->curr_msg = NULL; | |
643 | if (msg->rsp[2] != 0) { | |
644 | /* Error getting event, probably done. */ | |
645 | msg->done(msg); | |
646 | ||
647 | /* Take off the msg flag. */ | |
648 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
649 | handle_flags(smi_info); | |
650 | } else { | |
64959e2d | 651 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 652 | |
c305e3d3 CM |
653 | /* |
654 | * Do this before we deliver the message | |
655 | * because delivering the message releases the | |
656 | * lock and something else can mess with the | |
657 | * state. | |
658 | */ | |
1da177e4 LT |
659 | handle_flags(smi_info); |
660 | ||
661 | deliver_recv_msg(smi_info, msg); | |
662 | } | |
663 | break; | |
664 | } | |
665 | ||
666 | case SI_ENABLE_INTERRUPTS1: | |
667 | { | |
668 | unsigned char msg[4]; | |
669 | ||
670 | /* We got the flags from the SMI, now handle them. */ | |
671 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
672 | if (msg[2] != 0) { | |
673 | printk(KERN_WARNING | |
674 | "ipmi_si: Could not enable interrupts" | |
675 | ", failed get, using polled mode.\n"); | |
676 | smi_info->si_state = SI_NORMAL; | |
677 | } else { | |
678 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
679 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
ee6cd5f8 CM |
680 | msg[2] = (msg[3] | |
681 | IPMI_BMC_RCV_MSG_INTR | | |
682 | IPMI_BMC_EVT_MSG_INTR); | |
1da177e4 LT |
683 | smi_info->handlers->start_transaction( |
684 | smi_info->si_sm, msg, 3); | |
685 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
686 | } | |
687 | break; | |
688 | } | |
689 | ||
690 | case SI_ENABLE_INTERRUPTS2: | |
691 | { | |
692 | unsigned char msg[4]; | |
693 | ||
694 | /* We got the flags from the SMI, now handle them. */ | |
695 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
696 | if (msg[2] != 0) { | |
697 | printk(KERN_WARNING | |
698 | "ipmi_si: Could not enable interrupts" | |
699 | ", failed set, using polled mode.\n"); | |
700 | } | |
701 | smi_info->si_state = SI_NORMAL; | |
702 | break; | |
703 | } | |
ee6cd5f8 CM |
704 | |
705 | case SI_DISABLE_INTERRUPTS1: | |
706 | { | |
707 | unsigned char msg[4]; | |
708 | ||
709 | /* We got the flags from the SMI, now handle them. */ | |
710 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
711 | if (msg[2] != 0) { | |
712 | printk(KERN_WARNING | |
713 | "ipmi_si: Could not disable interrupts" | |
714 | ", failed get.\n"); | |
715 | smi_info->si_state = SI_NORMAL; | |
716 | } else { | |
717 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
718 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
719 | msg[2] = (msg[3] & | |
720 | ~(IPMI_BMC_RCV_MSG_INTR | | |
721 | IPMI_BMC_EVT_MSG_INTR)); | |
722 | smi_info->handlers->start_transaction( | |
723 | smi_info->si_sm, msg, 3); | |
724 | smi_info->si_state = SI_DISABLE_INTERRUPTS2; | |
725 | } | |
726 | break; | |
727 | } | |
728 | ||
729 | case SI_DISABLE_INTERRUPTS2: | |
730 | { | |
731 | unsigned char msg[4]; | |
732 | ||
733 | /* We got the flags from the SMI, now handle them. */ | |
734 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
735 | if (msg[2] != 0) { | |
736 | printk(KERN_WARNING | |
737 | "ipmi_si: Could not disable interrupts" | |
738 | ", failed set.\n"); | |
739 | } | |
740 | smi_info->si_state = SI_NORMAL; | |
741 | break; | |
742 | } | |
1da177e4 LT |
743 | } |
744 | } | |
745 | ||
c305e3d3 CM |
746 | /* |
747 | * Called on timeouts and events. Timeouts should pass the elapsed | |
748 | * time, interrupts should pass in zero. Must be called with | |
749 | * si_lock held and interrupts disabled. | |
750 | */ | |
1da177e4 LT |
751 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
752 | int time) | |
753 | { | |
754 | enum si_sm_result si_sm_result; | |
755 | ||
756 | restart: | |
c305e3d3 CM |
757 | /* |
758 | * There used to be a loop here that waited a little while | |
759 | * (around 25us) before giving up. That turned out to be | |
760 | * pointless, the minimum delays I was seeing were in the 300us | |
761 | * range, which is far too long to wait in an interrupt. So | |
762 | * we just run until the state machine tells us something | |
763 | * happened or it needs a delay. | |
764 | */ | |
1da177e4 LT |
765 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
766 | time = 0; | |
767 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 768 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 769 | |
c305e3d3 | 770 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 771 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
772 | |
773 | handle_transaction_done(smi_info); | |
774 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 775 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 776 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 777 | |
c305e3d3 CM |
778 | /* |
779 | * Do the before return_hosed_msg, because that | |
780 | * releases the lock. | |
781 | */ | |
1da177e4 LT |
782 | smi_info->si_state = SI_NORMAL; |
783 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
784 | /* |
785 | * If we were handling a user message, format | |
786 | * a response to send to the upper layer to | |
787 | * tell it about the error. | |
788 | */ | |
4d7cbac7 | 789 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
790 | } |
791 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
792 | } | |
793 | ||
4ea18425 CM |
794 | /* |
795 | * We prefer handling attn over new messages. But don't do | |
796 | * this if there is not yet an upper layer to handle anything. | |
797 | */ | |
c305e3d3 | 798 | if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) { |
1da177e4 LT |
799 | unsigned char msg[2]; |
800 | ||
64959e2d | 801 | smi_inc_stat(smi_info, attentions); |
1da177e4 | 802 | |
c305e3d3 CM |
803 | /* |
804 | * Got a attn, send down a get message flags to see | |
805 | * what's causing it. It would be better to handle | |
806 | * this in the upper layer, but due to the way | |
807 | * interrupts work with the SMI, that's not really | |
808 | * possible. | |
809 | */ | |
1da177e4 LT |
810 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
811 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
812 | ||
813 | smi_info->handlers->start_transaction( | |
814 | smi_info->si_sm, msg, 2); | |
815 | smi_info->si_state = SI_GETTING_FLAGS; | |
816 | goto restart; | |
817 | } | |
818 | ||
819 | /* If we are currently idle, try to start the next message. */ | |
820 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 821 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
822 | |
823 | si_sm_result = start_next_msg(smi_info); | |
824 | if (si_sm_result != SI_SM_IDLE) | |
825 | goto restart; | |
c305e3d3 | 826 | } |
1da177e4 LT |
827 | |
828 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
829 | && (atomic_read(&smi_info->req_events))) { |
830 | /* | |
831 | * We are idle and the upper layer requested that I fetch | |
832 | * events, so do so. | |
833 | */ | |
55162fb1 | 834 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 835 | |
55162fb1 CM |
836 | smi_info->curr_msg = ipmi_alloc_smi_msg(); |
837 | if (!smi_info->curr_msg) | |
838 | goto out; | |
1da177e4 | 839 | |
55162fb1 CM |
840 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
841 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
842 | smi_info->curr_msg->data_size = 2; | |
1da177e4 LT |
843 | |
844 | smi_info->handlers->start_transaction( | |
55162fb1 CM |
845 | smi_info->si_sm, |
846 | smi_info->curr_msg->data, | |
847 | smi_info->curr_msg->data_size); | |
848 | smi_info->si_state = SI_GETTING_EVENTS; | |
1da177e4 LT |
849 | goto restart; |
850 | } | |
55162fb1 | 851 | out: |
1da177e4 LT |
852 | return si_sm_result; |
853 | } | |
854 | ||
855 | static void sender(void *send_info, | |
856 | struct ipmi_smi_msg *msg, | |
857 | int priority) | |
858 | { | |
859 | struct smi_info *smi_info = send_info; | |
860 | enum si_sm_result result; | |
861 | unsigned long flags; | |
862 | #ifdef DEBUG_TIMING | |
863 | struct timeval t; | |
864 | #endif | |
865 | ||
b361e27b CM |
866 | if (atomic_read(&smi_info->stop_operation)) { |
867 | msg->rsp[0] = msg->data[0] | 4; | |
868 | msg->rsp[1] = msg->data[1]; | |
869 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
870 | msg->rsp_size = 3; | |
871 | deliver_recv_msg(smi_info, msg); | |
872 | return; | |
873 | } | |
874 | ||
1da177e4 LT |
875 | #ifdef DEBUG_TIMING |
876 | do_gettimeofday(&t); | |
877 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
878 | #endif | |
879 | ||
880 | if (smi_info->run_to_completion) { | |
bda4c30a CM |
881 | /* |
882 | * If we are running to completion, then throw it in | |
883 | * the list and run transactions until everything is | |
884 | * clear. Priority doesn't matter here. | |
885 | */ | |
886 | ||
887 | /* | |
888 | * Run to completion means we are single-threaded, no | |
889 | * need for locks. | |
890 | */ | |
1da177e4 LT |
891 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); |
892 | ||
1da177e4 LT |
893 | result = smi_event_handler(smi_info, 0); |
894 | while (result != SI_SM_IDLE) { | |
895 | udelay(SI_SHORT_TIMEOUT_USEC); | |
896 | result = smi_event_handler(smi_info, | |
897 | SI_SHORT_TIMEOUT_USEC); | |
898 | } | |
1da177e4 | 899 | return; |
1da177e4 | 900 | } |
1da177e4 | 901 | |
bda4c30a CM |
902 | spin_lock_irqsave(&smi_info->msg_lock, flags); |
903 | if (priority > 0) | |
904 | list_add_tail(&msg->link, &smi_info->hp_xmit_msgs); | |
905 | else | |
906 | list_add_tail(&msg->link, &smi_info->xmit_msgs); | |
907 | spin_unlock_irqrestore(&smi_info->msg_lock, flags); | |
908 | ||
909 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
c305e3d3 | 910 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) |
1da177e4 | 911 | start_next_msg(smi_info); |
bda4c30a | 912 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
913 | } |
914 | ||
915 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
916 | { | |
917 | struct smi_info *smi_info = send_info; | |
918 | enum si_sm_result result; | |
1da177e4 LT |
919 | |
920 | smi_info->run_to_completion = i_run_to_completion; | |
921 | if (i_run_to_completion) { | |
922 | result = smi_event_handler(smi_info, 0); | |
923 | while (result != SI_SM_IDLE) { | |
924 | udelay(SI_SHORT_TIMEOUT_USEC); | |
925 | result = smi_event_handler(smi_info, | |
926 | SI_SHORT_TIMEOUT_USEC); | |
927 | } | |
928 | } | |
1da177e4 LT |
929 | } |
930 | ||
ae74e823 MW |
931 | /* |
932 | * Use -1 in the nsec value of the busy waiting timespec to tell that | |
933 | * we are spinning in kipmid looking for something and not delaying | |
934 | * between checks | |
935 | */ | |
936 | static inline void ipmi_si_set_not_busy(struct timespec *ts) | |
937 | { | |
938 | ts->tv_nsec = -1; | |
939 | } | |
940 | static inline int ipmi_si_is_busy(struct timespec *ts) | |
941 | { | |
942 | return ts->tv_nsec != -1; | |
943 | } | |
944 | ||
945 | static int ipmi_thread_busy_wait(enum si_sm_result smi_result, | |
946 | const struct smi_info *smi_info, | |
947 | struct timespec *busy_until) | |
948 | { | |
949 | unsigned int max_busy_us = 0; | |
950 | ||
951 | if (smi_info->intf_num < num_max_busy_us) | |
952 | max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; | |
953 | if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) | |
954 | ipmi_si_set_not_busy(busy_until); | |
955 | else if (!ipmi_si_is_busy(busy_until)) { | |
956 | getnstimeofday(busy_until); | |
957 | timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); | |
958 | } else { | |
959 | struct timespec now; | |
960 | getnstimeofday(&now); | |
961 | if (unlikely(timespec_compare(&now, busy_until) > 0)) { | |
962 | ipmi_si_set_not_busy(busy_until); | |
963 | return 0; | |
964 | } | |
965 | } | |
966 | return 1; | |
967 | } | |
968 | ||
969 | ||
970 | /* | |
971 | * A busy-waiting loop for speeding up IPMI operation. | |
972 | * | |
973 | * Lousy hardware makes this hard. This is only enabled for systems | |
974 | * that are not BT and do not have interrupts. It starts spinning | |
975 | * when an operation is complete or until max_busy tells it to stop | |
976 | * (if that is enabled). See the paragraph on kimid_max_busy_us in | |
977 | * Documentation/IPMI.txt for details. | |
978 | */ | |
a9a2c44f CM |
979 | static int ipmi_thread(void *data) |
980 | { | |
981 | struct smi_info *smi_info = data; | |
e9a705a0 | 982 | unsigned long flags; |
a9a2c44f | 983 | enum si_sm_result smi_result; |
ae74e823 | 984 | struct timespec busy_until; |
a9a2c44f | 985 | |
ae74e823 | 986 | ipmi_si_set_not_busy(&busy_until); |
a9a2c44f | 987 | set_user_nice(current, 19); |
e9a705a0 | 988 | while (!kthread_should_stop()) { |
ae74e823 MW |
989 | int busy_wait; |
990 | ||
a9a2c44f | 991 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 992 | smi_result = smi_event_handler(smi_info, 0); |
a9a2c44f | 993 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
ae74e823 MW |
994 | busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, |
995 | &busy_until); | |
c305e3d3 CM |
996 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
997 | ; /* do nothing */ | |
ae74e823 | 998 | else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) |
33979734 | 999 | schedule(); |
e9a705a0 | 1000 | else |
ae74e823 | 1001 | schedule_timeout_interruptible(0); |
a9a2c44f | 1002 | } |
a9a2c44f CM |
1003 | return 0; |
1004 | } | |
1005 | ||
1006 | ||
1da177e4 LT |
1007 | static void poll(void *send_info) |
1008 | { | |
1009 | struct smi_info *smi_info = send_info; | |
fcfa4724 | 1010 | unsigned long flags; |
1da177e4 | 1011 | |
15c62e10 CM |
1012 | /* |
1013 | * Make sure there is some delay in the poll loop so we can | |
1014 | * drive time forward and timeout things. | |
1015 | */ | |
1016 | udelay(10); | |
fcfa4724 | 1017 | spin_lock_irqsave(&smi_info->si_lock, flags); |
15c62e10 | 1018 | smi_event_handler(smi_info, 10); |
fcfa4724 | 1019 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
1020 | } |
1021 | ||
1022 | static void request_events(void *send_info) | |
1023 | { | |
1024 | struct smi_info *smi_info = send_info; | |
1025 | ||
40112ae7 CM |
1026 | if (atomic_read(&smi_info->stop_operation) || |
1027 | !smi_info->has_event_buffer) | |
b361e27b CM |
1028 | return; |
1029 | ||
1da177e4 LT |
1030 | atomic_set(&smi_info->req_events, 1); |
1031 | } | |
1032 | ||
0c8204b3 | 1033 | static int initialized; |
1da177e4 | 1034 | |
1da177e4 LT |
1035 | static void smi_timeout(unsigned long data) |
1036 | { | |
1037 | struct smi_info *smi_info = (struct smi_info *) data; | |
1038 | enum si_sm_result smi_result; | |
1039 | unsigned long flags; | |
1040 | unsigned long jiffies_now; | |
c4edff1c | 1041 | long time_diff; |
1da177e4 LT |
1042 | #ifdef DEBUG_TIMING |
1043 | struct timeval t; | |
1044 | #endif | |
1045 | ||
1da177e4 LT |
1046 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
1047 | #ifdef DEBUG_TIMING | |
1048 | do_gettimeofday(&t); | |
c305e3d3 | 1049 | printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1050 | #endif |
1051 | jiffies_now = jiffies; | |
c4edff1c | 1052 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
1053 | * SI_USEC_PER_JIFFY); |
1054 | smi_result = smi_event_handler(smi_info, time_diff); | |
1055 | ||
1056 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1057 | ||
1058 | smi_info->last_timeout_jiffies = jiffies_now; | |
1059 | ||
b0defcdb | 1060 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 LT |
1061 | /* Running with interrupts, only do long timeouts. */ |
1062 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
64959e2d | 1063 | smi_inc_stat(smi_info, long_timeouts); |
1da177e4 LT |
1064 | goto do_add_timer; |
1065 | } | |
1066 | ||
c305e3d3 CM |
1067 | /* |
1068 | * If the state machine asks for a short delay, then shorten | |
1069 | * the timer timeout. | |
1070 | */ | |
1da177e4 | 1071 | if (smi_result == SI_SM_CALL_WITH_DELAY) { |
64959e2d | 1072 | smi_inc_stat(smi_info, short_timeouts); |
1da177e4 | 1073 | smi_info->si_timer.expires = jiffies + 1; |
1da177e4 | 1074 | } else { |
64959e2d | 1075 | smi_inc_stat(smi_info, long_timeouts); |
1da177e4 | 1076 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1077 | } |
1078 | ||
1079 | do_add_timer: | |
1080 | add_timer(&(smi_info->si_timer)); | |
1081 | } | |
1082 | ||
7d12e780 | 1083 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
1084 | { |
1085 | struct smi_info *smi_info = data; | |
1086 | unsigned long flags; | |
1087 | #ifdef DEBUG_TIMING | |
1088 | struct timeval t; | |
1089 | #endif | |
1090 | ||
1091 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1092 | ||
64959e2d | 1093 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1094 | |
1da177e4 LT |
1095 | #ifdef DEBUG_TIMING |
1096 | do_gettimeofday(&t); | |
c305e3d3 | 1097 | printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1098 | #endif |
1099 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1100 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1101 | return IRQ_HANDLED; | |
1102 | } | |
1103 | ||
7d12e780 | 1104 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
1105 | { |
1106 | struct smi_info *smi_info = data; | |
1107 | /* We need to clear the IRQ flag for the BT interface. */ | |
1108 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1109 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1110 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 1111 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
1112 | } |
1113 | ||
453823ba CM |
1114 | static int smi_start_processing(void *send_info, |
1115 | ipmi_smi_t intf) | |
1116 | { | |
1117 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1118 | int enable = 0; |
453823ba CM |
1119 | |
1120 | new_smi->intf = intf; | |
1121 | ||
c45adc39 CM |
1122 | /* Try to claim any interrupts. */ |
1123 | if (new_smi->irq_setup) | |
1124 | new_smi->irq_setup(new_smi); | |
1125 | ||
453823ba CM |
1126 | /* Set up the timer that drives the interface. */ |
1127 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
1128 | new_smi->last_timeout_jiffies = jiffies; | |
1129 | mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
1130 | ||
a51f4a81 CM |
1131 | /* |
1132 | * Check if the user forcefully enabled the daemon. | |
1133 | */ | |
1134 | if (new_smi->intf_num < num_force_kipmid) | |
1135 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1136 | /* |
1137 | * The BT interface is efficient enough to not need a thread, | |
1138 | * and there is no need for a thread if we have interrupts. | |
1139 | */ | |
c305e3d3 | 1140 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
a51f4a81 CM |
1141 | enable = 1; |
1142 | ||
1143 | if (enable) { | |
453823ba CM |
1144 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1145 | "kipmi%d", new_smi->intf_num); | |
1146 | if (IS_ERR(new_smi->thread)) { | |
1147 | printk(KERN_NOTICE "ipmi_si_intf: Could not start" | |
1148 | " kernel thread due to error %ld, only using" | |
1149 | " timers to drive the interface\n", | |
1150 | PTR_ERR(new_smi->thread)); | |
1151 | new_smi->thread = NULL; | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | return 0; | |
1156 | } | |
9dbf68f9 | 1157 | |
b9675136 CM |
1158 | static void set_maintenance_mode(void *send_info, int enable) |
1159 | { | |
1160 | struct smi_info *smi_info = send_info; | |
1161 | ||
1162 | if (!enable) | |
1163 | atomic_set(&smi_info->req_events, 0); | |
1164 | } | |
1165 | ||
c305e3d3 | 1166 | static struct ipmi_smi_handlers handlers = { |
1da177e4 | 1167 | .owner = THIS_MODULE, |
453823ba | 1168 | .start_processing = smi_start_processing, |
1da177e4 LT |
1169 | .sender = sender, |
1170 | .request_events = request_events, | |
b9675136 | 1171 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
1172 | .set_run_to_completion = set_run_to_completion, |
1173 | .poll = poll, | |
1174 | }; | |
1175 | ||
c305e3d3 CM |
1176 | /* |
1177 | * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1178 | * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. | |
1179 | */ | |
1da177e4 | 1180 | |
b0defcdb | 1181 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1182 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1183 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1184 | |
1da177e4 | 1185 | #define DEFAULT_REGSPACING 1 |
dba9b4f6 | 1186 | #define DEFAULT_REGSIZE 1 |
1da177e4 LT |
1187 | |
1188 | static int si_trydefaults = 1; | |
1189 | static char *si_type[SI_MAX_PARMS]; | |
1190 | #define MAX_SI_TYPE_STR 30 | |
1191 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1192 | static unsigned long addrs[SI_MAX_PARMS]; | |
64a6f950 | 1193 | static unsigned int num_addrs; |
1da177e4 | 1194 | static unsigned int ports[SI_MAX_PARMS]; |
64a6f950 | 1195 | static unsigned int num_ports; |
1da177e4 | 1196 | static int irqs[SI_MAX_PARMS]; |
64a6f950 | 1197 | static unsigned int num_irqs; |
1da177e4 | 1198 | static int regspacings[SI_MAX_PARMS]; |
64a6f950 | 1199 | static unsigned int num_regspacings; |
1da177e4 | 1200 | static int regsizes[SI_MAX_PARMS]; |
64a6f950 | 1201 | static unsigned int num_regsizes; |
1da177e4 | 1202 | static int regshifts[SI_MAX_PARMS]; |
64a6f950 | 1203 | static unsigned int num_regshifts; |
2f95d513 | 1204 | static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ |
64a6f950 | 1205 | static unsigned int num_slave_addrs; |
1da177e4 | 1206 | |
b361e27b CM |
1207 | #define IPMI_IO_ADDR_SPACE 0 |
1208 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1209 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1210 | |
1211 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1212 | ||
1213 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1214 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1215 | " Documentation/IPMI.txt in the kernel sources for the" | |
1216 | " gory details."); | |
1da177e4 LT |
1217 | |
1218 | module_param_named(trydefaults, si_trydefaults, bool, 0); | |
1219 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1220 | " default scan of the KCS and SMIC interface at the standard" | |
1221 | " address"); | |
1222 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1223 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1224 | " interface separated by commas. The types are 'kcs'," | |
1225 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1226 | " the first interface to kcs and the second to bt"); | |
64a6f950 | 1227 | module_param_array(addrs, ulong, &num_addrs, 0); |
1da177e4 LT |
1228 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" |
1229 | " addresses separated by commas. Only use if an interface" | |
1230 | " is in memory. Otherwise, set it to zero or leave" | |
1231 | " it blank."); | |
64a6f950 | 1232 | module_param_array(ports, uint, &num_ports, 0); |
1da177e4 LT |
1233 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" |
1234 | " addresses separated by commas. Only use if an interface" | |
1235 | " is a port. Otherwise, set it to zero or leave" | |
1236 | " it blank."); | |
1237 | module_param_array(irqs, int, &num_irqs, 0); | |
1238 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1239 | " addresses separated by commas. Only use if an interface" | |
1240 | " has an interrupt. Otherwise, set it to zero or leave" | |
1241 | " it blank."); | |
1242 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1243 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1244 | " and each successive register used by the interface. For" | |
1245 | " instance, if the start address is 0xca2 and the spacing" | |
1246 | " is 2, then the second address is at 0xca4. Defaults" | |
1247 | " to 1."); | |
1248 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1249 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1250 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1251 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1252 | " the 8-bit IPMI register has to be read from a larger" | |
1253 | " register."); | |
1254 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1255 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1256 | " IPMI register, in bits. For instance, if the data" | |
1257 | " is read from a 32-bit word and the IPMI data is in" | |
1258 | " bit 8-15, then the shift would be 8"); | |
1259 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1260 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1261 | " the controller. Normally this is 0x20, but can be" | |
1262 | " overridden by this parm. This is an array indexed" | |
1263 | " by interface number."); | |
a51f4a81 CM |
1264 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1265 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1266 | " disabled(0). Normally the IPMI driver auto-detects" | |
1267 | " this, but the value may be overridden by this parm."); | |
b361e27b CM |
1268 | module_param(unload_when_empty, int, 0); |
1269 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" | |
1270 | " specified or found, default is 1. Setting to 0" | |
1271 | " is useful for hot add of devices using hotmod."); | |
ae74e823 MW |
1272 | module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); |
1273 | MODULE_PARM_DESC(kipmid_max_busy_us, | |
1274 | "Max time (in microseconds) to busy-wait for IPMI data before" | |
1275 | " sleeping. 0 (default) means to wait forever. Set to 100-500" | |
1276 | " if kipmid is using up a lot of CPU time."); | |
1da177e4 LT |
1277 | |
1278 | ||
b0defcdb | 1279 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1280 | { |
b0defcdb CM |
1281 | if (info->si_type == SI_BT) |
1282 | /* Disable the interrupt in the BT interface. */ | |
1283 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1284 | free_irq(info->irq, info); | |
1da177e4 | 1285 | } |
1da177e4 LT |
1286 | |
1287 | static int std_irq_setup(struct smi_info *info) | |
1288 | { | |
1289 | int rv; | |
1290 | ||
b0defcdb | 1291 | if (!info->irq) |
1da177e4 LT |
1292 | return 0; |
1293 | ||
9dbf68f9 CM |
1294 | if (info->si_type == SI_BT) { |
1295 | rv = request_irq(info->irq, | |
1296 | si_bt_irq_handler, | |
ee6cd5f8 | 1297 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1298 | DEVICE_NAME, |
1299 | info); | |
b0defcdb | 1300 | if (!rv) |
9dbf68f9 CM |
1301 | /* Enable the interrupt in the BT interface. */ |
1302 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1303 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1304 | } else | |
1305 | rv = request_irq(info->irq, | |
1306 | si_irq_handler, | |
ee6cd5f8 | 1307 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1308 | DEVICE_NAME, |
1309 | info); | |
1da177e4 LT |
1310 | if (rv) { |
1311 | printk(KERN_WARNING | |
1312 | "ipmi_si: %s unable to claim interrupt %d," | |
1313 | " running polled\n", | |
1314 | DEVICE_NAME, info->irq); | |
1315 | info->irq = 0; | |
1316 | } else { | |
b0defcdb | 1317 | info->irq_cleanup = std_irq_cleanup; |
1da177e4 LT |
1318 | printk(" Using irq %d\n", info->irq); |
1319 | } | |
1320 | ||
1321 | return rv; | |
1322 | } | |
1323 | ||
1da177e4 LT |
1324 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1325 | { | |
b0defcdb | 1326 | unsigned int addr = io->addr_data; |
1da177e4 | 1327 | |
b0defcdb | 1328 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1329 | } |
1330 | ||
1331 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1332 | unsigned char b) | |
1333 | { | |
b0defcdb | 1334 | unsigned int addr = io->addr_data; |
1da177e4 | 1335 | |
b0defcdb | 1336 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1337 | } |
1338 | ||
1339 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1340 | { | |
b0defcdb | 1341 | unsigned int addr = io->addr_data; |
1da177e4 | 1342 | |
b0defcdb | 1343 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1344 | } |
1345 | ||
1346 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1347 | unsigned char b) | |
1348 | { | |
b0defcdb | 1349 | unsigned int addr = io->addr_data; |
1da177e4 | 1350 | |
b0defcdb | 1351 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1352 | } |
1353 | ||
1354 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1355 | { | |
b0defcdb | 1356 | unsigned int addr = io->addr_data; |
1da177e4 | 1357 | |
b0defcdb | 1358 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1359 | } |
1360 | ||
1361 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1362 | unsigned char b) | |
1363 | { | |
b0defcdb | 1364 | unsigned int addr = io->addr_data; |
1da177e4 | 1365 | |
b0defcdb | 1366 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1367 | } |
1368 | ||
1369 | static void port_cleanup(struct smi_info *info) | |
1370 | { | |
b0defcdb | 1371 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1372 | int idx; |
1da177e4 | 1373 | |
b0defcdb | 1374 | if (addr) { |
c305e3d3 | 1375 | for (idx = 0; idx < info->io_size; idx++) |
d61a3ead CM |
1376 | release_region(addr + idx * info->io.regspacing, |
1377 | info->io.regsize); | |
1da177e4 | 1378 | } |
1da177e4 LT |
1379 | } |
1380 | ||
1381 | static int port_setup(struct smi_info *info) | |
1382 | { | |
b0defcdb | 1383 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1384 | int idx; |
1da177e4 | 1385 | |
b0defcdb | 1386 | if (!addr) |
1da177e4 LT |
1387 | return -ENODEV; |
1388 | ||
1389 | info->io_cleanup = port_cleanup; | |
1390 | ||
c305e3d3 CM |
1391 | /* |
1392 | * Figure out the actual inb/inw/inl/etc routine to use based | |
1393 | * upon the register size. | |
1394 | */ | |
1da177e4 LT |
1395 | switch (info->io.regsize) { |
1396 | case 1: | |
1397 | info->io.inputb = port_inb; | |
1398 | info->io.outputb = port_outb; | |
1399 | break; | |
1400 | case 2: | |
1401 | info->io.inputb = port_inw; | |
1402 | info->io.outputb = port_outw; | |
1403 | break; | |
1404 | case 4: | |
1405 | info->io.inputb = port_inl; | |
1406 | info->io.outputb = port_outl; | |
1407 | break; | |
1408 | default: | |
c305e3d3 | 1409 | printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n", |
1da177e4 LT |
1410 | info->io.regsize); |
1411 | return -EINVAL; | |
1412 | } | |
1413 | ||
c305e3d3 CM |
1414 | /* |
1415 | * Some BIOSes reserve disjoint I/O regions in their ACPI | |
d61a3ead CM |
1416 | * tables. This causes problems when trying to register the |
1417 | * entire I/O region. Therefore we must register each I/O | |
1418 | * port separately. | |
1419 | */ | |
c305e3d3 | 1420 | for (idx = 0; idx < info->io_size; idx++) { |
d61a3ead CM |
1421 | if (request_region(addr + idx * info->io.regspacing, |
1422 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1423 | /* Undo allocations */ | |
1424 | while (idx--) { | |
1425 | release_region(addr + idx * info->io.regspacing, | |
1426 | info->io.regsize); | |
1427 | } | |
1428 | return -EIO; | |
1429 | } | |
1430 | } | |
1da177e4 LT |
1431 | return 0; |
1432 | } | |
1433 | ||
546cfdf4 | 1434 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1435 | { |
1436 | return readb((io->addr)+(offset * io->regspacing)); | |
1437 | } | |
1438 | ||
546cfdf4 | 1439 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1440 | unsigned char b) |
1441 | { | |
1442 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1443 | } | |
1444 | ||
546cfdf4 | 1445 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1446 | { |
1447 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1448 | & 0xff; |
1da177e4 LT |
1449 | } |
1450 | ||
546cfdf4 | 1451 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1452 | unsigned char b) |
1453 | { | |
1454 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1455 | } | |
1456 | ||
546cfdf4 | 1457 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1458 | { |
1459 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1460 | & 0xff; |
1da177e4 LT |
1461 | } |
1462 | ||
546cfdf4 | 1463 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1464 | unsigned char b) |
1465 | { | |
1466 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1467 | } | |
1468 | ||
1469 | #ifdef readq | |
1470 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1471 | { | |
1472 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1473 | & 0xff; |
1da177e4 LT |
1474 | } |
1475 | ||
1476 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1477 | unsigned char b) | |
1478 | { | |
1479 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1480 | } | |
1481 | #endif | |
1482 | ||
1483 | static void mem_cleanup(struct smi_info *info) | |
1484 | { | |
b0defcdb | 1485 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1486 | int mapsize; |
1487 | ||
1488 | if (info->io.addr) { | |
1489 | iounmap(info->io.addr); | |
1490 | ||
1491 | mapsize = ((info->io_size * info->io.regspacing) | |
1492 | - (info->io.regspacing - info->io.regsize)); | |
1493 | ||
b0defcdb | 1494 | release_mem_region(addr, mapsize); |
1da177e4 | 1495 | } |
1da177e4 LT |
1496 | } |
1497 | ||
1498 | static int mem_setup(struct smi_info *info) | |
1499 | { | |
b0defcdb | 1500 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1501 | int mapsize; |
1502 | ||
b0defcdb | 1503 | if (!addr) |
1da177e4 LT |
1504 | return -ENODEV; |
1505 | ||
1506 | info->io_cleanup = mem_cleanup; | |
1507 | ||
c305e3d3 CM |
1508 | /* |
1509 | * Figure out the actual readb/readw/readl/etc routine to use based | |
1510 | * upon the register size. | |
1511 | */ | |
1da177e4 LT |
1512 | switch (info->io.regsize) { |
1513 | case 1: | |
546cfdf4 AD |
1514 | info->io.inputb = intf_mem_inb; |
1515 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1516 | break; |
1517 | case 2: | |
546cfdf4 AD |
1518 | info->io.inputb = intf_mem_inw; |
1519 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1520 | break; |
1521 | case 4: | |
546cfdf4 AD |
1522 | info->io.inputb = intf_mem_inl; |
1523 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1524 | break; |
1525 | #ifdef readq | |
1526 | case 8: | |
1527 | info->io.inputb = mem_inq; | |
1528 | info->io.outputb = mem_outq; | |
1529 | break; | |
1530 | #endif | |
1531 | default: | |
c305e3d3 | 1532 | printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n", |
1da177e4 LT |
1533 | info->io.regsize); |
1534 | return -EINVAL; | |
1535 | } | |
1536 | ||
c305e3d3 CM |
1537 | /* |
1538 | * Calculate the total amount of memory to claim. This is an | |
1da177e4 LT |
1539 | * unusual looking calculation, but it avoids claiming any |
1540 | * more memory than it has to. It will claim everything | |
1541 | * between the first address to the end of the last full | |
c305e3d3 CM |
1542 | * register. |
1543 | */ | |
1da177e4 LT |
1544 | mapsize = ((info->io_size * info->io.regspacing) |
1545 | - (info->io.regspacing - info->io.regsize)); | |
1546 | ||
b0defcdb | 1547 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1548 | return -EIO; |
1549 | ||
b0defcdb | 1550 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1551 | if (info->io.addr == NULL) { |
b0defcdb | 1552 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1553 | return -EIO; |
1554 | } | |
1555 | return 0; | |
1556 | } | |
1557 | ||
b361e27b CM |
1558 | /* |
1559 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1560 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1561 | * Options are: | |
1562 | * rsp=<regspacing> | |
1563 | * rsi=<regsize> | |
1564 | * rsh=<regshift> | |
1565 | * irq=<irq> | |
1566 | * ipmb=<ipmb addr> | |
1567 | */ | |
1568 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1569 | struct hotmod_vals { | |
1570 | char *name; | |
1571 | int val; | |
1572 | }; | |
1573 | static struct hotmod_vals hotmod_ops[] = { | |
1574 | { "add", HM_ADD }, | |
1575 | { "remove", HM_REMOVE }, | |
1576 | { NULL } | |
1577 | }; | |
1578 | static struct hotmod_vals hotmod_si[] = { | |
1579 | { "kcs", SI_KCS }, | |
1580 | { "smic", SI_SMIC }, | |
1581 | { "bt", SI_BT }, | |
1582 | { NULL } | |
1583 | }; | |
1584 | static struct hotmod_vals hotmod_as[] = { | |
1585 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1586 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1587 | { NULL } | |
1588 | }; | |
1d5636cc | 1589 | |
b361e27b CM |
1590 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1591 | { | |
1592 | char *s; | |
1593 | int i; | |
1594 | ||
1595 | s = strchr(*curr, ','); | |
1596 | if (!s) { | |
1597 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1598 | return -EINVAL; | |
1599 | } | |
1600 | *s = '\0'; | |
1601 | s++; | |
1602 | for (i = 0; hotmod_ops[i].name; i++) { | |
1d5636cc | 1603 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1604 | *val = v[i].val; |
1605 | *curr = s; | |
1606 | return 0; | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1611 | return -EINVAL; | |
1612 | } | |
1613 | ||
1d5636cc CM |
1614 | static int check_hotmod_int_op(const char *curr, const char *option, |
1615 | const char *name, int *val) | |
1616 | { | |
1617 | char *n; | |
1618 | ||
1619 | if (strcmp(curr, name) == 0) { | |
1620 | if (!option) { | |
1621 | printk(KERN_WARNING PFX | |
1622 | "No option given for '%s'\n", | |
1623 | curr); | |
1624 | return -EINVAL; | |
1625 | } | |
1626 | *val = simple_strtoul(option, &n, 0); | |
1627 | if ((*n != '\0') || (*option == '\0')) { | |
1628 | printk(KERN_WARNING PFX | |
1629 | "Bad option given for '%s'\n", | |
1630 | curr); | |
1631 | return -EINVAL; | |
1632 | } | |
1633 | return 1; | |
1634 | } | |
1635 | return 0; | |
1636 | } | |
1637 | ||
b361e27b CM |
1638 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1639 | { | |
1640 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1641 | int rv; |
b361e27b CM |
1642 | char *next, *curr, *s, *n, *o; |
1643 | enum hotmod_op op; | |
1644 | enum si_type si_type; | |
1645 | int addr_space; | |
1646 | unsigned long addr; | |
1647 | int regspacing; | |
1648 | int regsize; | |
1649 | int regshift; | |
1650 | int irq; | |
1651 | int ipmb; | |
1652 | int ival; | |
1d5636cc | 1653 | int len; |
b361e27b CM |
1654 | struct smi_info *info; |
1655 | ||
1656 | if (!str) | |
1657 | return -ENOMEM; | |
1658 | ||
1659 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1660 | len = strlen(str); |
1661 | ival = len - 1; | |
b361e27b CM |
1662 | while ((ival >= 0) && isspace(str[ival])) { |
1663 | str[ival] = '\0'; | |
1664 | ival--; | |
1665 | } | |
1666 | ||
1667 | for (curr = str; curr; curr = next) { | |
1668 | regspacing = 1; | |
1669 | regsize = 1; | |
1670 | regshift = 0; | |
1671 | irq = 0; | |
2f95d513 | 1672 | ipmb = 0; /* Choose the default if not specified */ |
b361e27b CM |
1673 | |
1674 | next = strchr(curr, ':'); | |
1675 | if (next) { | |
1676 | *next = '\0'; | |
1677 | next++; | |
1678 | } | |
1679 | ||
1680 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1681 | if (rv) | |
1682 | break; | |
1683 | op = ival; | |
1684 | ||
1685 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1686 | if (rv) | |
1687 | break; | |
1688 | si_type = ival; | |
1689 | ||
1690 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1691 | if (rv) | |
1692 | break; | |
1693 | ||
1694 | s = strchr(curr, ','); | |
1695 | if (s) { | |
1696 | *s = '\0'; | |
1697 | s++; | |
1698 | } | |
1699 | addr = simple_strtoul(curr, &n, 0); | |
1700 | if ((*n != '\0') || (*curr == '\0')) { | |
1701 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1702 | " '%s'\n", curr); | |
1703 | break; | |
1704 | } | |
1705 | ||
1706 | while (s) { | |
1707 | curr = s; | |
1708 | s = strchr(curr, ','); | |
1709 | if (s) { | |
1710 | *s = '\0'; | |
1711 | s++; | |
1712 | } | |
1713 | o = strchr(curr, '='); | |
1714 | if (o) { | |
1715 | *o = '\0'; | |
1716 | o++; | |
1717 | } | |
1d5636cc CM |
1718 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1719 | if (rv < 0) | |
b361e27b | 1720 | goto out; |
1d5636cc CM |
1721 | else if (rv) |
1722 | continue; | |
1723 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1724 | if (rv < 0) | |
1725 | goto out; | |
1726 | else if (rv) | |
1727 | continue; | |
1728 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1729 | if (rv < 0) | |
1730 | goto out; | |
1731 | else if (rv) | |
1732 | continue; | |
1733 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1734 | if (rv < 0) | |
1735 | goto out; | |
1736 | else if (rv) | |
1737 | continue; | |
1738 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1739 | if (rv < 0) | |
1740 | goto out; | |
1741 | else if (rv) | |
1742 | continue; | |
1743 | ||
1744 | rv = -EINVAL; | |
1745 | printk(KERN_WARNING PFX | |
1746 | "Invalid hotmod option '%s'\n", | |
1747 | curr); | |
1748 | goto out; | |
b361e27b CM |
1749 | } |
1750 | ||
1751 | if (op == HM_ADD) { | |
1752 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1753 | if (!info) { | |
1754 | rv = -ENOMEM; | |
1755 | goto out; | |
1756 | } | |
1757 | ||
1758 | info->addr_source = "hotmod"; | |
1759 | info->si_type = si_type; | |
1760 | info->io.addr_data = addr; | |
1761 | info->io.addr_type = addr_space; | |
1762 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1763 | info->io_setup = mem_setup; | |
1764 | else | |
1765 | info->io_setup = port_setup; | |
1766 | ||
1767 | info->io.addr = NULL; | |
1768 | info->io.regspacing = regspacing; | |
1769 | if (!info->io.regspacing) | |
1770 | info->io.regspacing = DEFAULT_REGSPACING; | |
1771 | info->io.regsize = regsize; | |
1772 | if (!info->io.regsize) | |
1773 | info->io.regsize = DEFAULT_REGSPACING; | |
1774 | info->io.regshift = regshift; | |
1775 | info->irq = irq; | |
1776 | if (info->irq) | |
1777 | info->irq_setup = std_irq_setup; | |
1778 | info->slave_addr = ipmb; | |
1779 | ||
1780 | try_smi_init(info); | |
1781 | } else { | |
1782 | /* remove */ | |
1783 | struct smi_info *e, *tmp_e; | |
1784 | ||
1785 | mutex_lock(&smi_infos_lock); | |
1786 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1787 | if (e->io.addr_type != addr_space) | |
1788 | continue; | |
1789 | if (e->si_type != si_type) | |
1790 | continue; | |
1791 | if (e->io.addr_data == addr) | |
1792 | cleanup_one_si(e); | |
1793 | } | |
1794 | mutex_unlock(&smi_infos_lock); | |
1795 | } | |
1796 | } | |
1d5636cc | 1797 | rv = len; |
b361e27b CM |
1798 | out: |
1799 | kfree(str); | |
1800 | return rv; | |
1801 | } | |
b0defcdb CM |
1802 | |
1803 | static __devinit void hardcode_find_bmc(void) | |
1da177e4 | 1804 | { |
b0defcdb | 1805 | int i; |
1da177e4 LT |
1806 | struct smi_info *info; |
1807 | ||
b0defcdb CM |
1808 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1809 | if (!ports[i] && !addrs[i]) | |
1810 | continue; | |
1da177e4 | 1811 | |
b0defcdb CM |
1812 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1813 | if (!info) | |
1814 | return; | |
1da177e4 | 1815 | |
b0defcdb | 1816 | info->addr_source = "hardcoded"; |
1da177e4 | 1817 | |
1d5636cc | 1818 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1819 | info->si_type = SI_KCS; |
1d5636cc | 1820 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1821 | info->si_type = SI_SMIC; |
1d5636cc | 1822 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1823 | info->si_type = SI_BT; |
1824 | } else { | |
1825 | printk(KERN_WARNING | |
1826 | "ipmi_si: Interface type specified " | |
1827 | "for interface %d, was invalid: %s\n", | |
1828 | i, si_type[i]); | |
1829 | kfree(info); | |
1830 | continue; | |
1831 | } | |
1da177e4 | 1832 | |
b0defcdb CM |
1833 | if (ports[i]) { |
1834 | /* An I/O port */ | |
1835 | info->io_setup = port_setup; | |
1836 | info->io.addr_data = ports[i]; | |
1837 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1838 | } else if (addrs[i]) { | |
1839 | /* A memory port */ | |
1840 | info->io_setup = mem_setup; | |
1841 | info->io.addr_data = addrs[i]; | |
1842 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1843 | } else { | |
1844 | printk(KERN_WARNING | |
1845 | "ipmi_si: Interface type specified " | |
1846 | "for interface %d, " | |
1847 | "but port and address were not set or " | |
1848 | "set to zero.\n", i); | |
1849 | kfree(info); | |
1850 | continue; | |
1851 | } | |
1da177e4 | 1852 | |
b0defcdb CM |
1853 | info->io.addr = NULL; |
1854 | info->io.regspacing = regspacings[i]; | |
1855 | if (!info->io.regspacing) | |
1856 | info->io.regspacing = DEFAULT_REGSPACING; | |
1857 | info->io.regsize = regsizes[i]; | |
1858 | if (!info->io.regsize) | |
1859 | info->io.regsize = DEFAULT_REGSPACING; | |
1860 | info->io.regshift = regshifts[i]; | |
1861 | info->irq = irqs[i]; | |
1862 | if (info->irq) | |
1863 | info->irq_setup = std_irq_setup; | |
2f95d513 | 1864 | info->slave_addr = slave_addrs[i]; |
1da177e4 | 1865 | |
b0defcdb CM |
1866 | try_smi_init(info); |
1867 | } | |
1868 | } | |
1da177e4 | 1869 | |
8466361a | 1870 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1871 | |
1872 | #include <linux/acpi.h> | |
1873 | ||
c305e3d3 CM |
1874 | /* |
1875 | * Once we get an ACPI failure, we don't try any more, because we go | |
1876 | * through the tables sequentially. Once we don't find a table, there | |
1877 | * are no more. | |
1878 | */ | |
0c8204b3 | 1879 | static int acpi_failure; |
1da177e4 LT |
1880 | |
1881 | /* For GPE-type interrupts. */ | |
1882 | static u32 ipmi_acpi_gpe(void *context) | |
1883 | { | |
1884 | struct smi_info *smi_info = context; | |
1885 | unsigned long flags; | |
1886 | #ifdef DEBUG_TIMING | |
1887 | struct timeval t; | |
1888 | #endif | |
1889 | ||
1890 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1891 | ||
64959e2d | 1892 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1893 | |
1da177e4 LT |
1894 | #ifdef DEBUG_TIMING |
1895 | do_gettimeofday(&t); | |
1896 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1897 | #endif | |
1898 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1899 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1900 | ||
1901 | return ACPI_INTERRUPT_HANDLED; | |
1902 | } | |
1903 | ||
b0defcdb CM |
1904 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
1905 | { | |
1906 | if (!info->irq) | |
1907 | return; | |
1908 | ||
1909 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1910 | } | |
1911 | ||
1da177e4 LT |
1912 | static int acpi_gpe_irq_setup(struct smi_info *info) |
1913 | { | |
1914 | acpi_status status; | |
1915 | ||
b0defcdb | 1916 | if (!info->irq) |
1da177e4 LT |
1917 | return 0; |
1918 | ||
1919 | /* FIXME - is level triggered right? */ | |
1920 | status = acpi_install_gpe_handler(NULL, | |
1921 | info->irq, | |
1922 | ACPI_GPE_LEVEL_TRIGGERED, | |
1923 | &ipmi_acpi_gpe, | |
1924 | info); | |
1925 | if (status != AE_OK) { | |
1926 | printk(KERN_WARNING | |
1927 | "ipmi_si: %s unable to claim ACPI GPE %d," | |
1928 | " running polled\n", | |
1929 | DEVICE_NAME, info->irq); | |
1930 | info->irq = 0; | |
1931 | return -EINVAL; | |
1932 | } else { | |
b0defcdb | 1933 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
1da177e4 LT |
1934 | printk(" Using ACPI GPE %d\n", info->irq); |
1935 | return 0; | |
1936 | } | |
1937 | } | |
1938 | ||
1da177e4 LT |
1939 | /* |
1940 | * Defined at | |
c305e3d3 CM |
1941 | * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/ |
1942 | * Docs/TechPapers/IA64/hpspmi.pdf | |
1da177e4 LT |
1943 | */ |
1944 | struct SPMITable { | |
1945 | s8 Signature[4]; | |
1946 | u32 Length; | |
1947 | u8 Revision; | |
1948 | u8 Checksum; | |
1949 | s8 OEMID[6]; | |
1950 | s8 OEMTableID[8]; | |
1951 | s8 OEMRevision[4]; | |
1952 | s8 CreatorID[4]; | |
1953 | s8 CreatorRevision[4]; | |
1954 | u8 InterfaceType; | |
1955 | u8 IPMIlegacy; | |
1956 | s16 SpecificationRevision; | |
1957 | ||
1958 | /* | |
1959 | * Bit 0 - SCI interrupt supported | |
1960 | * Bit 1 - I/O APIC/SAPIC | |
1961 | */ | |
1962 | u8 InterruptType; | |
1963 | ||
c305e3d3 CM |
1964 | /* |
1965 | * If bit 0 of InterruptType is set, then this is the SCI | |
1966 | * interrupt in the GPEx_STS register. | |
1967 | */ | |
1da177e4 LT |
1968 | u8 GPE; |
1969 | ||
1970 | s16 Reserved; | |
1971 | ||
c305e3d3 CM |
1972 | /* |
1973 | * If bit 1 of InterruptType is set, then this is the I/O | |
1974 | * APIC/SAPIC interrupt. | |
1975 | */ | |
1da177e4 LT |
1976 | u32 GlobalSystemInterrupt; |
1977 | ||
1978 | /* The actual register address. */ | |
1979 | struct acpi_generic_address addr; | |
1980 | ||
1981 | u8 UID[4]; | |
1982 | ||
1983 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
1984 | }; | |
1985 | ||
18a3e0bf | 1986 | static __devinit int try_init_spmi(struct SPMITable *spmi) |
1da177e4 LT |
1987 | { |
1988 | struct smi_info *info; | |
1da177e4 LT |
1989 | u8 addr_space; |
1990 | ||
1da177e4 LT |
1991 | if (spmi->IPMIlegacy != 1) { |
1992 | printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy); | |
c305e3d3 | 1993 | return -ENODEV; |
1da177e4 LT |
1994 | } |
1995 | ||
15a58ed1 | 1996 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
1da177e4 LT |
1997 | addr_space = IPMI_MEM_ADDR_SPACE; |
1998 | else | |
1999 | addr_space = IPMI_IO_ADDR_SPACE; | |
b0defcdb CM |
2000 | |
2001 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2002 | if (!info) { | |
2003 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n"); | |
2004 | return -ENOMEM; | |
2005 | } | |
2006 | ||
18a3e0bf | 2007 | info->addr_source = "SPMI"; |
1da177e4 | 2008 | |
1da177e4 | 2009 | /* Figure out the interface type. */ |
c305e3d3 | 2010 | switch (spmi->InterfaceType) { |
1da177e4 | 2011 | case 1: /* KCS */ |
b0defcdb | 2012 | info->si_type = SI_KCS; |
1da177e4 | 2013 | break; |
1da177e4 | 2014 | case 2: /* SMIC */ |
b0defcdb | 2015 | info->si_type = SI_SMIC; |
1da177e4 | 2016 | break; |
1da177e4 | 2017 | case 3: /* BT */ |
b0defcdb | 2018 | info->si_type = SI_BT; |
1da177e4 | 2019 | break; |
1da177e4 LT |
2020 | default: |
2021 | printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n", | |
2022 | spmi->InterfaceType); | |
b0defcdb | 2023 | kfree(info); |
1da177e4 LT |
2024 | return -EIO; |
2025 | } | |
2026 | ||
1da177e4 LT |
2027 | if (spmi->InterruptType & 1) { |
2028 | /* We've got a GPE interrupt. */ | |
2029 | info->irq = spmi->GPE; | |
2030 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
2031 | } else if (spmi->InterruptType & 2) { |
2032 | /* We've got an APIC/SAPIC interrupt. */ | |
2033 | info->irq = spmi->GlobalSystemInterrupt; | |
2034 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
2035 | } else { |
2036 | /* Use the default interrupt setting. */ | |
2037 | info->irq = 0; | |
2038 | info->irq_setup = NULL; | |
2039 | } | |
2040 | ||
15a58ed1 | 2041 | if (spmi->addr.bit_width) { |
35bc37a0 | 2042 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 2043 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 2044 | } else { |
35bc37a0 CM |
2045 | info->io.regspacing = DEFAULT_REGSPACING; |
2046 | } | |
b0defcdb | 2047 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 2048 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 2049 | |
15a58ed1 | 2050 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 2051 | info->io_setup = mem_setup; |
8fe1425a | 2052 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
15a58ed1 | 2053 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 2054 | info->io_setup = port_setup; |
8fe1425a | 2055 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
2056 | } else { |
2057 | kfree(info); | |
c305e3d3 CM |
2058 | printk(KERN_WARNING |
2059 | "ipmi_si: Unknown ACPI I/O Address type\n"); | |
1da177e4 LT |
2060 | return -EIO; |
2061 | } | |
b0defcdb | 2062 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 2063 | |
b0defcdb | 2064 | try_smi_init(info); |
1da177e4 | 2065 | |
1da177e4 LT |
2066 | return 0; |
2067 | } | |
b0defcdb | 2068 | |
18a3e0bf | 2069 | static __devinit void spmi_find_bmc(void) |
b0defcdb CM |
2070 | { |
2071 | acpi_status status; | |
2072 | struct SPMITable *spmi; | |
2073 | int i; | |
2074 | ||
2075 | if (acpi_disabled) | |
2076 | return; | |
2077 | ||
2078 | if (acpi_failure) | |
2079 | return; | |
2080 | ||
2081 | for (i = 0; ; i++) { | |
15a58ed1 AS |
2082 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
2083 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
2084 | if (status != AE_OK) |
2085 | return; | |
2086 | ||
18a3e0bf | 2087 | try_init_spmi(spmi); |
b0defcdb CM |
2088 | } |
2089 | } | |
9e368fa0 BH |
2090 | |
2091 | static int __devinit ipmi_pnp_probe(struct pnp_dev *dev, | |
2092 | const struct pnp_device_id *dev_id) | |
2093 | { | |
2094 | struct acpi_device *acpi_dev; | |
2095 | struct smi_info *info; | |
2096 | acpi_handle handle; | |
2097 | acpi_status status; | |
2098 | unsigned long long tmp; | |
2099 | ||
2100 | acpi_dev = pnp_acpi_device(dev); | |
2101 | if (!acpi_dev) | |
2102 | return -ENODEV; | |
2103 | ||
2104 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2105 | if (!info) | |
2106 | return -ENOMEM; | |
2107 | ||
2108 | info->addr_source = "ACPI"; | |
2109 | ||
2110 | handle = acpi_dev->handle; | |
2111 | ||
2112 | /* _IFT tells us the interface type: KCS, BT, etc */ | |
2113 | status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp); | |
2114 | if (ACPI_FAILURE(status)) | |
2115 | goto err_free; | |
2116 | ||
2117 | switch (tmp) { | |
2118 | case 1: | |
2119 | info->si_type = SI_KCS; | |
2120 | break; | |
2121 | case 2: | |
2122 | info->si_type = SI_SMIC; | |
2123 | break; | |
2124 | case 3: | |
2125 | info->si_type = SI_BT; | |
2126 | break; | |
2127 | default: | |
2128 | dev_info(&dev->dev, "unknown interface type %lld\n", tmp); | |
2129 | goto err_free; | |
2130 | } | |
2131 | ||
2132 | if (pnp_port_valid(dev, 0)) { | |
2133 | info->io_setup = port_setup; | |
2134 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2135 | info->io.addr_data = pnp_port_start(dev, 0); | |
2136 | } else if (pnp_mem_valid(dev, 0)) { | |
2137 | info->io_setup = mem_setup; | |
2138 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2139 | info->io.addr_data = pnp_mem_start(dev, 0); | |
2140 | } else { | |
2141 | dev_err(&dev->dev, "no I/O or memory address\n"); | |
2142 | goto err_free; | |
2143 | } | |
2144 | ||
2145 | info->io.regspacing = DEFAULT_REGSPACING; | |
2146 | info->io.regsize = DEFAULT_REGSPACING; | |
2147 | info->io.regshift = 0; | |
2148 | ||
2149 | /* If _GPE exists, use it; otherwise use standard interrupts */ | |
2150 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); | |
2151 | if (ACPI_SUCCESS(status)) { | |
2152 | info->irq = tmp; | |
2153 | info->irq_setup = acpi_gpe_irq_setup; | |
2154 | } else if (pnp_irq_valid(dev, 0)) { | |
2155 | info->irq = pnp_irq(dev, 0); | |
2156 | info->irq_setup = std_irq_setup; | |
2157 | } | |
2158 | ||
2159 | info->dev = &acpi_dev->dev; | |
2160 | pnp_set_drvdata(dev, info); | |
2161 | ||
2162 | return try_smi_init(info); | |
2163 | ||
2164 | err_free: | |
2165 | kfree(info); | |
2166 | return -EINVAL; | |
2167 | } | |
2168 | ||
2169 | static void __devexit ipmi_pnp_remove(struct pnp_dev *dev) | |
2170 | { | |
2171 | struct smi_info *info = pnp_get_drvdata(dev); | |
2172 | ||
2173 | cleanup_one_si(info); | |
2174 | } | |
2175 | ||
2176 | static const struct pnp_device_id pnp_dev_table[] = { | |
2177 | {"IPI0001", 0}, | |
2178 | {"", 0}, | |
2179 | }; | |
2180 | ||
2181 | static struct pnp_driver ipmi_pnp_driver = { | |
2182 | .name = DEVICE_NAME, | |
2183 | .probe = ipmi_pnp_probe, | |
2184 | .remove = __devexit_p(ipmi_pnp_remove), | |
2185 | .id_table = pnp_dev_table, | |
2186 | }; | |
1da177e4 LT |
2187 | #endif |
2188 | ||
a9fad4cc | 2189 | #ifdef CONFIG_DMI |
c305e3d3 | 2190 | struct dmi_ipmi_data { |
1da177e4 LT |
2191 | u8 type; |
2192 | u8 addr_space; | |
2193 | unsigned long base_addr; | |
2194 | u8 irq; | |
2195 | u8 offset; | |
2196 | u8 slave_addr; | |
b0defcdb | 2197 | }; |
1da177e4 | 2198 | |
1855256c | 2199 | static int __devinit decode_dmi(const struct dmi_header *dm, |
b0defcdb | 2200 | struct dmi_ipmi_data *dmi) |
1da177e4 | 2201 | { |
1855256c | 2202 | const u8 *data = (const u8 *)dm; |
1da177e4 LT |
2203 | unsigned long base_addr; |
2204 | u8 reg_spacing; | |
b224cd3a | 2205 | u8 len = dm->length; |
1da177e4 | 2206 | |
b0defcdb | 2207 | dmi->type = data[4]; |
1da177e4 LT |
2208 | |
2209 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
2210 | if (len >= 0x11) { | |
2211 | if (base_addr & 1) { | |
2212 | /* I/O */ | |
2213 | base_addr &= 0xFFFE; | |
b0defcdb | 2214 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
c305e3d3 | 2215 | } else |
1da177e4 | 2216 | /* Memory */ |
b0defcdb | 2217 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
c305e3d3 | 2218 | |
1da177e4 LT |
2219 | /* If bit 4 of byte 0x10 is set, then the lsb for the address |
2220 | is odd. */ | |
b0defcdb | 2221 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 2222 | |
b0defcdb | 2223 | dmi->irq = data[0x11]; |
1da177e4 LT |
2224 | |
2225 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 2226 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
c305e3d3 | 2227 | switch (reg_spacing) { |
1da177e4 | 2228 | case 0x00: /* Byte boundaries */ |
b0defcdb | 2229 | dmi->offset = 1; |
1da177e4 LT |
2230 | break; |
2231 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 2232 | dmi->offset = 4; |
1da177e4 LT |
2233 | break; |
2234 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 2235 | dmi->offset = 16; |
1da177e4 LT |
2236 | break; |
2237 | default: | |
2238 | /* Some other interface, just ignore it. */ | |
2239 | return -EIO; | |
2240 | } | |
2241 | } else { | |
2242 | /* Old DMI spec. */ | |
c305e3d3 CM |
2243 | /* |
2244 | * Note that technically, the lower bit of the base | |
92068801 CM |
2245 | * address should be 1 if the address is I/O and 0 if |
2246 | * the address is in memory. So many systems get that | |
2247 | * wrong (and all that I have seen are I/O) so we just | |
2248 | * ignore that bit and assume I/O. Systems that use | |
c305e3d3 CM |
2249 | * memory should use the newer spec, anyway. |
2250 | */ | |
b0defcdb CM |
2251 | dmi->base_addr = base_addr & 0xfffe; |
2252 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
2253 | dmi->offset = 1; | |
1da177e4 LT |
2254 | } |
2255 | ||
b0defcdb | 2256 | dmi->slave_addr = data[6]; |
1da177e4 | 2257 | |
b0defcdb | 2258 | return 0; |
1da177e4 LT |
2259 | } |
2260 | ||
b0defcdb | 2261 | static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 2262 | { |
b0defcdb | 2263 | struct smi_info *info; |
1da177e4 | 2264 | |
b0defcdb CM |
2265 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2266 | if (!info) { | |
2267 | printk(KERN_ERR | |
2268 | "ipmi_si: Could not allocate SI data\n"); | |
2269 | return; | |
1da177e4 | 2270 | } |
1da177e4 | 2271 | |
b0defcdb | 2272 | info->addr_source = "SMBIOS"; |
1da177e4 | 2273 | |
e8b33617 | 2274 | switch (ipmi_data->type) { |
b0defcdb CM |
2275 | case 0x01: /* KCS */ |
2276 | info->si_type = SI_KCS; | |
2277 | break; | |
2278 | case 0x02: /* SMIC */ | |
2279 | info->si_type = SI_SMIC; | |
2280 | break; | |
2281 | case 0x03: /* BT */ | |
2282 | info->si_type = SI_BT; | |
2283 | break; | |
2284 | default: | |
80cd6920 | 2285 | kfree(info); |
b0defcdb | 2286 | return; |
1da177e4 | 2287 | } |
1da177e4 | 2288 | |
b0defcdb CM |
2289 | switch (ipmi_data->addr_space) { |
2290 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2291 | info->io_setup = mem_setup; |
b0defcdb CM |
2292 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2293 | break; | |
2294 | ||
2295 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2296 | info->io_setup = port_setup; |
b0defcdb CM |
2297 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2298 | break; | |
2299 | ||
2300 | default: | |
1da177e4 | 2301 | kfree(info); |
b0defcdb CM |
2302 | printk(KERN_WARNING |
2303 | "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n", | |
2304 | ipmi_data->addr_space); | |
2305 | return; | |
1da177e4 | 2306 | } |
b0defcdb | 2307 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2308 | |
b0defcdb CM |
2309 | info->io.regspacing = ipmi_data->offset; |
2310 | if (!info->io.regspacing) | |
1da177e4 LT |
2311 | info->io.regspacing = DEFAULT_REGSPACING; |
2312 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2313 | info->io.regshift = 0; |
1da177e4 LT |
2314 | |
2315 | info->slave_addr = ipmi_data->slave_addr; | |
2316 | ||
b0defcdb CM |
2317 | info->irq = ipmi_data->irq; |
2318 | if (info->irq) | |
2319 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2320 | |
b0defcdb CM |
2321 | try_smi_init(info); |
2322 | } | |
1da177e4 | 2323 | |
b0defcdb CM |
2324 | static void __devinit dmi_find_bmc(void) |
2325 | { | |
1855256c | 2326 | const struct dmi_device *dev = NULL; |
b0defcdb CM |
2327 | struct dmi_ipmi_data data; |
2328 | int rv; | |
2329 | ||
2330 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2331 | memset(&data, 0, sizeof(data)); |
1855256c JG |
2332 | rv = decode_dmi((const struct dmi_header *) dev->device_data, |
2333 | &data); | |
b0defcdb CM |
2334 | if (!rv) |
2335 | try_init_dmi(&data); | |
2336 | } | |
1da177e4 | 2337 | } |
a9fad4cc | 2338 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2339 | |
2340 | #ifdef CONFIG_PCI | |
2341 | ||
b0defcdb CM |
2342 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2343 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2344 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2345 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2346 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2347 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2348 | ||
1da177e4 LT |
2349 | #define PCI_HP_VENDOR_ID 0x103C |
2350 | #define PCI_MMC_DEVICE_ID 0x121A | |
2351 | #define PCI_MMC_ADDR_CW 0x10 | |
2352 | ||
b0defcdb CM |
2353 | static void ipmi_pci_cleanup(struct smi_info *info) |
2354 | { | |
2355 | struct pci_dev *pdev = info->addr_source_data; | |
2356 | ||
2357 | pci_disable_device(pdev); | |
2358 | } | |
1da177e4 | 2359 | |
b0defcdb CM |
2360 | static int __devinit ipmi_pci_probe(struct pci_dev *pdev, |
2361 | const struct pci_device_id *ent) | |
1da177e4 | 2362 | { |
b0defcdb CM |
2363 | int rv; |
2364 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2365 | struct smi_info *info; | |
1da177e4 | 2366 | |
b0defcdb CM |
2367 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2368 | if (!info) | |
1cd441f9 | 2369 | return -ENOMEM; |
1da177e4 | 2370 | |
b0defcdb | 2371 | info->addr_source = "PCI"; |
1da177e4 | 2372 | |
b0defcdb CM |
2373 | switch (class_type) { |
2374 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2375 | info->si_type = SI_SMIC; | |
2376 | break; | |
1da177e4 | 2377 | |
b0defcdb CM |
2378 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2379 | info->si_type = SI_KCS; | |
2380 | break; | |
2381 | ||
2382 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2383 | info->si_type = SI_BT; | |
2384 | break; | |
2385 | ||
2386 | default: | |
2387 | kfree(info); | |
2388 | printk(KERN_INFO "ipmi_si: %s: Unknown IPMI type: %d\n", | |
2389 | pci_name(pdev), class_type); | |
1cd441f9 | 2390 | return -ENOMEM; |
1da177e4 LT |
2391 | } |
2392 | ||
b0defcdb CM |
2393 | rv = pci_enable_device(pdev); |
2394 | if (rv) { | |
2395 | printk(KERN_ERR "ipmi_si: %s: couldn't enable PCI device\n", | |
2396 | pci_name(pdev)); | |
2397 | kfree(info); | |
2398 | return rv; | |
1da177e4 LT |
2399 | } |
2400 | ||
b0defcdb CM |
2401 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2402 | info->addr_source_data = pdev; | |
1da177e4 | 2403 | |
b0defcdb CM |
2404 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2405 | info->io_setup = port_setup; | |
2406 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2407 | } else { | |
2408 | info->io_setup = mem_setup; | |
2409 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2410 | } |
b0defcdb | 2411 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2412 | |
b0defcdb | 2413 | info->io.regspacing = DEFAULT_REGSPACING; |
1da177e4 | 2414 | info->io.regsize = DEFAULT_REGSPACING; |
b0defcdb | 2415 | info->io.regshift = 0; |
1da177e4 | 2416 | |
b0defcdb CM |
2417 | info->irq = pdev->irq; |
2418 | if (info->irq) | |
2419 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2420 | |
50c812b2 | 2421 | info->dev = &pdev->dev; |
fca3b747 | 2422 | pci_set_drvdata(pdev, info); |
50c812b2 | 2423 | |
b0defcdb CM |
2424 | return try_smi_init(info); |
2425 | } | |
1da177e4 | 2426 | |
b0defcdb CM |
2427 | static void __devexit ipmi_pci_remove(struct pci_dev *pdev) |
2428 | { | |
fca3b747 CM |
2429 | struct smi_info *info = pci_get_drvdata(pdev); |
2430 | cleanup_one_si(info); | |
b0defcdb | 2431 | } |
1da177e4 | 2432 | |
b0defcdb CM |
2433 | #ifdef CONFIG_PM |
2434 | static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
2435 | { | |
1da177e4 LT |
2436 | return 0; |
2437 | } | |
1da177e4 | 2438 | |
b0defcdb | 2439 | static int ipmi_pci_resume(struct pci_dev *pdev) |
1da177e4 | 2440 | { |
b0defcdb CM |
2441 | return 0; |
2442 | } | |
1da177e4 | 2443 | #endif |
1da177e4 | 2444 | |
b0defcdb CM |
2445 | static struct pci_device_id ipmi_pci_devices[] = { |
2446 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
248bdd5e KC |
2447 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, |
2448 | { 0, } | |
b0defcdb CM |
2449 | }; |
2450 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2451 | ||
2452 | static struct pci_driver ipmi_pci_driver = { | |
c305e3d3 CM |
2453 | .name = DEVICE_NAME, |
2454 | .id_table = ipmi_pci_devices, | |
2455 | .probe = ipmi_pci_probe, | |
2456 | .remove = __devexit_p(ipmi_pci_remove), | |
b0defcdb | 2457 | #ifdef CONFIG_PM |
c305e3d3 CM |
2458 | .suspend = ipmi_pci_suspend, |
2459 | .resume = ipmi_pci_resume, | |
b0defcdb CM |
2460 | #endif |
2461 | }; | |
2462 | #endif /* CONFIG_PCI */ | |
1da177e4 LT |
2463 | |
2464 | ||
dba9b4f6 CM |
2465 | #ifdef CONFIG_PPC_OF |
2466 | static int __devinit ipmi_of_probe(struct of_device *dev, | |
2467 | const struct of_device_id *match) | |
2468 | { | |
2469 | struct smi_info *info; | |
2470 | struct resource resource; | |
2471 | const int *regsize, *regspacing, *regshift; | |
2472 | struct device_node *np = dev->node; | |
2473 | int ret; | |
2474 | int proplen; | |
2475 | ||
2476 | dev_info(&dev->dev, PFX "probing via device tree\n"); | |
2477 | ||
2478 | ret = of_address_to_resource(np, 0, &resource); | |
2479 | if (ret) { | |
2480 | dev_warn(&dev->dev, PFX "invalid address from OF\n"); | |
2481 | return ret; | |
2482 | } | |
2483 | ||
9c25099d | 2484 | regsize = of_get_property(np, "reg-size", &proplen); |
dba9b4f6 CM |
2485 | if (regsize && proplen != 4) { |
2486 | dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); | |
2487 | return -EINVAL; | |
2488 | } | |
2489 | ||
9c25099d | 2490 | regspacing = of_get_property(np, "reg-spacing", &proplen); |
dba9b4f6 CM |
2491 | if (regspacing && proplen != 4) { |
2492 | dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); | |
2493 | return -EINVAL; | |
2494 | } | |
2495 | ||
9c25099d | 2496 | regshift = of_get_property(np, "reg-shift", &proplen); |
dba9b4f6 CM |
2497 | if (regshift && proplen != 4) { |
2498 | dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); | |
2499 | return -EINVAL; | |
2500 | } | |
2501 | ||
2502 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2503 | ||
2504 | if (!info) { | |
2505 | dev_err(&dev->dev, | |
2506 | PFX "could not allocate memory for OF probe\n"); | |
2507 | return -ENOMEM; | |
2508 | } | |
2509 | ||
2510 | info->si_type = (enum si_type) match->data; | |
2511 | info->addr_source = "device-tree"; | |
dba9b4f6 CM |
2512 | info->irq_setup = std_irq_setup; |
2513 | ||
3b7ec117 NC |
2514 | if (resource.flags & IORESOURCE_IO) { |
2515 | info->io_setup = port_setup; | |
2516 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2517 | } else { | |
2518 | info->io_setup = mem_setup; | |
2519 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2520 | } | |
2521 | ||
dba9b4f6 CM |
2522 | info->io.addr_data = resource.start; |
2523 | ||
2524 | info->io.regsize = regsize ? *regsize : DEFAULT_REGSIZE; | |
2525 | info->io.regspacing = regspacing ? *regspacing : DEFAULT_REGSPACING; | |
2526 | info->io.regshift = regshift ? *regshift : 0; | |
2527 | ||
2528 | info->irq = irq_of_parse_and_map(dev->node, 0); | |
2529 | info->dev = &dev->dev; | |
2530 | ||
32d21985 | 2531 | dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %x\n", |
dba9b4f6 CM |
2532 | info->io.addr_data, info->io.regsize, info->io.regspacing, |
2533 | info->irq); | |
2534 | ||
9de33df4 | 2535 | dev_set_drvdata(&dev->dev, info); |
dba9b4f6 CM |
2536 | |
2537 | return try_smi_init(info); | |
2538 | } | |
2539 | ||
2540 | static int __devexit ipmi_of_remove(struct of_device *dev) | |
2541 | { | |
9de33df4 | 2542 | cleanup_one_si(dev_get_drvdata(&dev->dev)); |
dba9b4f6 CM |
2543 | return 0; |
2544 | } | |
2545 | ||
2546 | static struct of_device_id ipmi_match[] = | |
2547 | { | |
c305e3d3 CM |
2548 | { .type = "ipmi", .compatible = "ipmi-kcs", |
2549 | .data = (void *)(unsigned long) SI_KCS }, | |
2550 | { .type = "ipmi", .compatible = "ipmi-smic", | |
2551 | .data = (void *)(unsigned long) SI_SMIC }, | |
2552 | { .type = "ipmi", .compatible = "ipmi-bt", | |
2553 | .data = (void *)(unsigned long) SI_BT }, | |
dba9b4f6 CM |
2554 | {}, |
2555 | }; | |
2556 | ||
c305e3d3 | 2557 | static struct of_platform_driver ipmi_of_platform_driver = { |
dba9b4f6 CM |
2558 | .name = "ipmi", |
2559 | .match_table = ipmi_match, | |
2560 | .probe = ipmi_of_probe, | |
2561 | .remove = __devexit_p(ipmi_of_remove), | |
2562 | }; | |
2563 | #endif /* CONFIG_PPC_OF */ | |
2564 | ||
40112ae7 | 2565 | static int wait_for_msg_done(struct smi_info *smi_info) |
1da177e4 | 2566 | { |
50c812b2 | 2567 | enum si_sm_result smi_result; |
1da177e4 LT |
2568 | |
2569 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 2570 | for (;;) { |
c3e7e791 CM |
2571 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2572 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2573 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2574 | smi_result = smi_info->handlers->event( |
2575 | smi_info->si_sm, 100); | |
c305e3d3 | 2576 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
2577 | smi_result = smi_info->handlers->event( |
2578 | smi_info->si_sm, 0); | |
c305e3d3 | 2579 | } else |
1da177e4 LT |
2580 | break; |
2581 | } | |
40112ae7 | 2582 | if (smi_result == SI_SM_HOSED) |
c305e3d3 CM |
2583 | /* |
2584 | * We couldn't get the state machine to run, so whatever's at | |
2585 | * the port is probably not an IPMI SMI interface. | |
2586 | */ | |
40112ae7 CM |
2587 | return -ENODEV; |
2588 | ||
2589 | return 0; | |
2590 | } | |
2591 | ||
2592 | static int try_get_dev_id(struct smi_info *smi_info) | |
2593 | { | |
2594 | unsigned char msg[2]; | |
2595 | unsigned char *resp; | |
2596 | unsigned long resp_len; | |
2597 | int rv = 0; | |
2598 | ||
2599 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2600 | if (!resp) | |
2601 | return -ENOMEM; | |
2602 | ||
2603 | /* | |
2604 | * Do a Get Device ID command, since it comes back with some | |
2605 | * useful info. | |
2606 | */ | |
2607 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2608 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2609 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2610 | ||
2611 | rv = wait_for_msg_done(smi_info); | |
2612 | if (rv) | |
1da177e4 | 2613 | goto out; |
1da177e4 | 2614 | |
1da177e4 LT |
2615 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, |
2616 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 2617 | |
d8c98618 CM |
2618 | /* Check and record info from the get device id, in case we need it. */ |
2619 | rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); | |
1da177e4 LT |
2620 | |
2621 | out: | |
2622 | kfree(resp); | |
2623 | return rv; | |
2624 | } | |
2625 | ||
40112ae7 CM |
2626 | static int try_enable_event_buffer(struct smi_info *smi_info) |
2627 | { | |
2628 | unsigned char msg[3]; | |
2629 | unsigned char *resp; | |
2630 | unsigned long resp_len; | |
2631 | int rv = 0; | |
2632 | ||
2633 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2634 | if (!resp) | |
2635 | return -ENOMEM; | |
2636 | ||
2637 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2638 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
2639 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2640 | ||
2641 | rv = wait_for_msg_done(smi_info); | |
2642 | if (rv) { | |
2643 | printk(KERN_WARNING | |
2644 | "ipmi_si: Error getting response from get global," | |
2645 | " enables command, the event buffer is not" | |
2646 | " enabled.\n"); | |
2647 | goto out; | |
2648 | } | |
2649 | ||
2650 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2651 | resp, IPMI_MAX_MSG_LENGTH); | |
2652 | ||
2653 | if (resp_len < 4 || | |
2654 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2655 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
2656 | resp[2] != 0) { | |
2657 | printk(KERN_WARNING | |
2658 | "ipmi_si: Invalid return from get global" | |
2659 | " enables command, cannot enable the event" | |
2660 | " buffer.\n"); | |
2661 | rv = -EINVAL; | |
2662 | goto out; | |
2663 | } | |
2664 | ||
2665 | if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) | |
2666 | /* buffer is already enabled, nothing to do. */ | |
2667 | goto out; | |
2668 | ||
2669 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2670 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
2671 | msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; | |
2672 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
2673 | ||
2674 | rv = wait_for_msg_done(smi_info); | |
2675 | if (rv) { | |
2676 | printk(KERN_WARNING | |
2677 | "ipmi_si: Error getting response from set global," | |
2678 | " enables command, the event buffer is not" | |
2679 | " enabled.\n"); | |
2680 | goto out; | |
2681 | } | |
2682 | ||
2683 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2684 | resp, IPMI_MAX_MSG_LENGTH); | |
2685 | ||
2686 | if (resp_len < 3 || | |
2687 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2688 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
2689 | printk(KERN_WARNING | |
2690 | "ipmi_si: Invalid return from get global," | |
2691 | "enables command, not enable the event" | |
2692 | " buffer.\n"); | |
2693 | rv = -EINVAL; | |
2694 | goto out; | |
2695 | } | |
2696 | ||
2697 | if (resp[2] != 0) | |
2698 | /* | |
2699 | * An error when setting the event buffer bit means | |
2700 | * that the event buffer is not supported. | |
2701 | */ | |
2702 | rv = -ENOENT; | |
2703 | out: | |
2704 | kfree(resp); | |
2705 | return rv; | |
2706 | } | |
2707 | ||
1da177e4 LT |
2708 | static int type_file_read_proc(char *page, char **start, off_t off, |
2709 | int count, int *eof, void *data) | |
2710 | { | |
1da177e4 LT |
2711 | struct smi_info *smi = data; |
2712 | ||
b361e27b | 2713 | return sprintf(page, "%s\n", si_to_str[smi->si_type]); |
1da177e4 LT |
2714 | } |
2715 | ||
2716 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
2717 | int count, int *eof, void *data) | |
2718 | { | |
2719 | char *out = (char *) page; | |
2720 | struct smi_info *smi = data; | |
2721 | ||
2722 | out += sprintf(out, "interrupts_enabled: %d\n", | |
b0defcdb | 2723 | smi->irq && !smi->interrupt_disabled); |
64959e2d CM |
2724 | out += sprintf(out, "short_timeouts: %u\n", |
2725 | smi_get_stat(smi, short_timeouts)); | |
2726 | out += sprintf(out, "long_timeouts: %u\n", | |
2727 | smi_get_stat(smi, long_timeouts)); | |
64959e2d CM |
2728 | out += sprintf(out, "idles: %u\n", |
2729 | smi_get_stat(smi, idles)); | |
2730 | out += sprintf(out, "interrupts: %u\n", | |
2731 | smi_get_stat(smi, interrupts)); | |
2732 | out += sprintf(out, "attentions: %u\n", | |
2733 | smi_get_stat(smi, attentions)); | |
2734 | out += sprintf(out, "flag_fetches: %u\n", | |
2735 | smi_get_stat(smi, flag_fetches)); | |
2736 | out += sprintf(out, "hosed_count: %u\n", | |
2737 | smi_get_stat(smi, hosed_count)); | |
2738 | out += sprintf(out, "complete_transactions: %u\n", | |
2739 | smi_get_stat(smi, complete_transactions)); | |
2740 | out += sprintf(out, "events: %u\n", | |
2741 | smi_get_stat(smi, events)); | |
2742 | out += sprintf(out, "watchdog_pretimeouts: %u\n", | |
2743 | smi_get_stat(smi, watchdog_pretimeouts)); | |
2744 | out += sprintf(out, "incoming_messages: %u\n", | |
2745 | smi_get_stat(smi, incoming_messages)); | |
1da177e4 | 2746 | |
b361e27b CM |
2747 | return out - page; |
2748 | } | |
2749 | ||
2750 | static int param_read_proc(char *page, char **start, off_t off, | |
2751 | int count, int *eof, void *data) | |
2752 | { | |
2753 | struct smi_info *smi = data; | |
2754 | ||
2755 | return sprintf(page, | |
2756 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", | |
2757 | si_to_str[smi->si_type], | |
2758 | addr_space_to_str[smi->io.addr_type], | |
2759 | smi->io.addr_data, | |
2760 | smi->io.regspacing, | |
2761 | smi->io.regsize, | |
2762 | smi->io.regshift, | |
2763 | smi->irq, | |
2764 | smi->slave_addr); | |
1da177e4 LT |
2765 | } |
2766 | ||
3ae0e0f9 CM |
2767 | /* |
2768 | * oem_data_avail_to_receive_msg_avail | |
2769 | * @info - smi_info structure with msg_flags set | |
2770 | * | |
2771 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
2772 | * Returns 1 indicating need to re-run handle_flags(). | |
2773 | */ | |
2774 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
2775 | { | |
e8b33617 | 2776 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 2777 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
2778 | return 1; |
2779 | } | |
2780 | ||
2781 | /* | |
2782 | * setup_dell_poweredge_oem_data_handler | |
2783 | * @info - smi_info.device_id must be populated | |
2784 | * | |
2785 | * Systems that match, but have firmware version < 1.40 may assert | |
2786 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
2787 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
2788 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
2789 | * as RECEIVE_MSG_AVAIL instead. | |
2790 | * | |
2791 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
2792 | * assert the OEM[012] bits, and if it did, the driver would have to | |
2793 | * change to handle that properly, we don't actually check for the | |
2794 | * firmware version. | |
2795 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
2796 | * Device Revision = 0x80 | |
2797 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
2798 | * Firmware Revision2 = 0x40 BCD encoded | |
2799 | * IPMI Version = 0x51 IPMI 1.5 | |
2800 | * Manufacturer ID = A2 02 00 Dell IANA | |
2801 | * | |
d5a2b89a CM |
2802 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
2803 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
2804 | * | |
3ae0e0f9 CM |
2805 | */ |
2806 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
2807 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
2808 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 2809 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
2810 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
2811 | { | |
2812 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2813 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
2814 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
2815 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 2816 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
2817 | smi_info->oem_data_avail_handler = |
2818 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
2819 | } else if (ipmi_version_major(id) < 1 || |
2820 | (ipmi_version_major(id) == 1 && | |
2821 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
2822 | smi_info->oem_data_avail_handler = |
2823 | oem_data_avail_to_receive_msg_avail; | |
2824 | } | |
3ae0e0f9 CM |
2825 | } |
2826 | } | |
2827 | ||
ea94027b CM |
2828 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
2829 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
2830 | { | |
2831 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
2832 | ||
2833 | /* Make it a reponse */ | |
2834 | msg->rsp[0] = msg->data[0] | 4; | |
2835 | msg->rsp[1] = msg->data[1]; | |
2836 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
2837 | msg->rsp_size = 3; | |
2838 | smi_info->curr_msg = NULL; | |
2839 | deliver_recv_msg(smi_info, msg); | |
2840 | } | |
2841 | ||
2842 | /* | |
2843 | * dell_poweredge_bt_xaction_handler | |
2844 | * @info - smi_info.device_id must be populated | |
2845 | * | |
2846 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
2847 | * not respond to a Get SDR command if the length of the data | |
2848 | * requested is exactly 0x3A, which leads to command timeouts and no | |
2849 | * data returned. This intercepts such commands, and causes userspace | |
2850 | * callers to try again with a different-sized buffer, which succeeds. | |
2851 | */ | |
2852 | ||
2853 | #define STORAGE_NETFN 0x0A | |
2854 | #define STORAGE_CMD_GET_SDR 0x23 | |
2855 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
2856 | unsigned long unused, | |
2857 | void *in) | |
2858 | { | |
2859 | struct smi_info *smi_info = in; | |
2860 | unsigned char *data = smi_info->curr_msg->data; | |
2861 | unsigned int size = smi_info->curr_msg->data_size; | |
2862 | if (size >= 8 && | |
2863 | (data[0]>>2) == STORAGE_NETFN && | |
2864 | data[1] == STORAGE_CMD_GET_SDR && | |
2865 | data[7] == 0x3A) { | |
2866 | return_hosed_msg_badsize(smi_info); | |
2867 | return NOTIFY_STOP; | |
2868 | } | |
2869 | return NOTIFY_DONE; | |
2870 | } | |
2871 | ||
2872 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
2873 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
2874 | }; | |
2875 | ||
2876 | /* | |
2877 | * setup_dell_poweredge_bt_xaction_handler | |
2878 | * @info - smi_info.device_id must be filled in already | |
2879 | * | |
2880 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
2881 | * when we know what function to use there. | |
2882 | */ | |
2883 | static void | |
2884 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
2885 | { | |
2886 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2887 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
2888 | smi_info->si_type == SI_BT) |
2889 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
2890 | } | |
2891 | ||
3ae0e0f9 CM |
2892 | /* |
2893 | * setup_oem_data_handler | |
2894 | * @info - smi_info.device_id must be filled in already | |
2895 | * | |
2896 | * Fills in smi_info.device_id.oem_data_available_handler | |
2897 | * when we know what function to use there. | |
2898 | */ | |
2899 | ||
2900 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
2901 | { | |
2902 | setup_dell_poweredge_oem_data_handler(smi_info); | |
2903 | } | |
2904 | ||
ea94027b CM |
2905 | static void setup_xaction_handlers(struct smi_info *smi_info) |
2906 | { | |
2907 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
2908 | } | |
2909 | ||
a9a2c44f CM |
2910 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
2911 | { | |
453823ba | 2912 | if (smi_info->intf) { |
c305e3d3 CM |
2913 | /* |
2914 | * The timer and thread are only running if the | |
2915 | * interface has been started up and registered. | |
2916 | */ | |
453823ba CM |
2917 | if (smi_info->thread != NULL) |
2918 | kthread_stop(smi_info->thread); | |
2919 | del_timer_sync(&smi_info->si_timer); | |
2920 | } | |
a9a2c44f CM |
2921 | } |
2922 | ||
7420884c | 2923 | static __devinitdata struct ipmi_default_vals |
b0defcdb CM |
2924 | { |
2925 | int type; | |
2926 | int port; | |
7420884c | 2927 | } ipmi_defaults[] = |
b0defcdb CM |
2928 | { |
2929 | { .type = SI_KCS, .port = 0xca2 }, | |
2930 | { .type = SI_SMIC, .port = 0xca9 }, | |
2931 | { .type = SI_BT, .port = 0xe4 }, | |
2932 | { .port = 0 } | |
2933 | }; | |
2934 | ||
2935 | static __devinit void default_find_bmc(void) | |
2936 | { | |
2937 | struct smi_info *info; | |
2938 | int i; | |
2939 | ||
2940 | for (i = 0; ; i++) { | |
2941 | if (!ipmi_defaults[i].port) | |
2942 | break; | |
68e1ee62 | 2943 | #ifdef CONFIG_PPC |
4ff31d77 CK |
2944 | if (check_legacy_ioport(ipmi_defaults[i].port)) |
2945 | continue; | |
2946 | #endif | |
a09f4855 AM |
2947 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2948 | if (!info) | |
2949 | return; | |
4ff31d77 | 2950 | |
b0defcdb CM |
2951 | info->addr_source = NULL; |
2952 | ||
2953 | info->si_type = ipmi_defaults[i].type; | |
2954 | info->io_setup = port_setup; | |
2955 | info->io.addr_data = ipmi_defaults[i].port; | |
2956 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2957 | ||
2958 | info->io.addr = NULL; | |
2959 | info->io.regspacing = DEFAULT_REGSPACING; | |
2960 | info->io.regsize = DEFAULT_REGSPACING; | |
2961 | info->io.regshift = 0; | |
2962 | ||
2963 | if (try_smi_init(info) == 0) { | |
2964 | /* Found one... */ | |
2965 | printk(KERN_INFO "ipmi_si: Found default %s state" | |
2966 | " machine at %s address 0x%lx\n", | |
2967 | si_to_str[info->si_type], | |
2968 | addr_space_to_str[info->io.addr_type], | |
2969 | info->io.addr_data); | |
2970 | return; | |
2971 | } | |
2972 | } | |
2973 | } | |
2974 | ||
2975 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 2976 | { |
b0defcdb | 2977 | struct smi_info *e; |
1da177e4 | 2978 | |
b0defcdb CM |
2979 | list_for_each_entry(e, &smi_infos, link) { |
2980 | if (e->io.addr_type != info->io.addr_type) | |
2981 | continue; | |
2982 | if (e->io.addr_data == info->io.addr_data) | |
2983 | return 0; | |
2984 | } | |
1da177e4 | 2985 | |
b0defcdb CM |
2986 | return 1; |
2987 | } | |
1da177e4 | 2988 | |
b0defcdb CM |
2989 | static int try_smi_init(struct smi_info *new_smi) |
2990 | { | |
2991 | int rv; | |
64959e2d | 2992 | int i; |
b0defcdb CM |
2993 | |
2994 | if (new_smi->addr_source) { | |
2995 | printk(KERN_INFO "ipmi_si: Trying %s-specified %s state" | |
2996 | " machine at %s address 0x%lx, slave address 0x%x," | |
2997 | " irq %d\n", | |
2998 | new_smi->addr_source, | |
2999 | si_to_str[new_smi->si_type], | |
3000 | addr_space_to_str[new_smi->io.addr_type], | |
3001 | new_smi->io.addr_data, | |
3002 | new_smi->slave_addr, new_smi->irq); | |
3003 | } | |
3004 | ||
d6dfd131 | 3005 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3006 | if (!is_new_interface(new_smi)) { |
3007 | printk(KERN_WARNING "ipmi_si: duplicate interface\n"); | |
3008 | rv = -EBUSY; | |
3009 | goto out_err; | |
3010 | } | |
1da177e4 LT |
3011 | |
3012 | /* So we know not to free it unless we have allocated one. */ | |
3013 | new_smi->intf = NULL; | |
3014 | new_smi->si_sm = NULL; | |
3015 | new_smi->handlers = NULL; | |
3016 | ||
b0defcdb CM |
3017 | switch (new_smi->si_type) { |
3018 | case SI_KCS: | |
1da177e4 | 3019 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
3020 | break; |
3021 | ||
3022 | case SI_SMIC: | |
1da177e4 | 3023 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
3024 | break; |
3025 | ||
3026 | case SI_BT: | |
1da177e4 | 3027 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
3028 | break; |
3029 | ||
3030 | default: | |
1da177e4 LT |
3031 | /* No support for anything else yet. */ |
3032 | rv = -EIO; | |
3033 | goto out_err; | |
3034 | } | |
3035 | ||
3036 | /* Allocate the state machine's data and initialize it. */ | |
3037 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 3038 | if (!new_smi->si_sm) { |
c305e3d3 | 3039 | printk(KERN_ERR "Could not allocate state machine memory\n"); |
1da177e4 LT |
3040 | rv = -ENOMEM; |
3041 | goto out_err; | |
3042 | } | |
3043 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
3044 | &new_smi->io); | |
3045 | ||
3046 | /* Now that we know the I/O size, we can set up the I/O. */ | |
3047 | rv = new_smi->io_setup(new_smi); | |
3048 | if (rv) { | |
c305e3d3 | 3049 | printk(KERN_ERR "Could not set up I/O space\n"); |
1da177e4 LT |
3050 | goto out_err; |
3051 | } | |
3052 | ||
3053 | spin_lock_init(&(new_smi->si_lock)); | |
3054 | spin_lock_init(&(new_smi->msg_lock)); | |
1da177e4 LT |
3055 | |
3056 | /* Do low-level detection first. */ | |
3057 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb CM |
3058 | if (new_smi->addr_source) |
3059 | printk(KERN_INFO "ipmi_si: Interface detection" | |
3060 | " failed\n"); | |
1da177e4 LT |
3061 | rv = -ENODEV; |
3062 | goto out_err; | |
3063 | } | |
3064 | ||
c305e3d3 CM |
3065 | /* |
3066 | * Attempt a get device id command. If it fails, we probably | |
3067 | * don't have a BMC here. | |
3068 | */ | |
1da177e4 | 3069 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
3070 | if (rv) { |
3071 | if (new_smi->addr_source) | |
3072 | printk(KERN_INFO "ipmi_si: There appears to be no BMC" | |
3073 | " at this location\n"); | |
1da177e4 | 3074 | goto out_err; |
b0defcdb | 3075 | } |
1da177e4 | 3076 | |
3ae0e0f9 | 3077 | setup_oem_data_handler(new_smi); |
ea94027b | 3078 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 3079 | |
1da177e4 LT |
3080 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); |
3081 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
3082 | new_smi->curr_msg = NULL; | |
3083 | atomic_set(&new_smi->req_events, 0); | |
3084 | new_smi->run_to_completion = 0; | |
64959e2d CM |
3085 | for (i = 0; i < SI_NUM_STATS; i++) |
3086 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 LT |
3087 | |
3088 | new_smi->interrupt_disabled = 0; | |
a9a2c44f | 3089 | atomic_set(&new_smi->stop_operation, 0); |
b0defcdb CM |
3090 | new_smi->intf_num = smi_num; |
3091 | smi_num++; | |
1da177e4 | 3092 | |
40112ae7 CM |
3093 | rv = try_enable_event_buffer(new_smi); |
3094 | if (rv == 0) | |
3095 | new_smi->has_event_buffer = 1; | |
3096 | ||
c305e3d3 CM |
3097 | /* |
3098 | * Start clearing the flags before we enable interrupts or the | |
3099 | * timer to avoid racing with the timer. | |
3100 | */ | |
1da177e4 LT |
3101 | start_clear_flags(new_smi); |
3102 | /* IRQ is defined to be set when non-zero. */ | |
3103 | if (new_smi->irq) | |
3104 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
3105 | ||
50c812b2 | 3106 | if (!new_smi->dev) { |
c305e3d3 CM |
3107 | /* |
3108 | * If we don't already have a device from something | |
3109 | * else (like PCI), then register a new one. | |
3110 | */ | |
50c812b2 CM |
3111 | new_smi->pdev = platform_device_alloc("ipmi_si", |
3112 | new_smi->intf_num); | |
8b32b5d0 | 3113 | if (!new_smi->pdev) { |
50c812b2 CM |
3114 | printk(KERN_ERR |
3115 | "ipmi_si_intf:" | |
3116 | " Unable to allocate platform device\n"); | |
453823ba | 3117 | goto out_err; |
50c812b2 CM |
3118 | } |
3119 | new_smi->dev = &new_smi->pdev->dev; | |
fe2d5ffc | 3120 | new_smi->dev->driver = &ipmi_driver.driver; |
50c812b2 | 3121 | |
b48f5457 | 3122 | rv = platform_device_add(new_smi->pdev); |
50c812b2 CM |
3123 | if (rv) { |
3124 | printk(KERN_ERR | |
3125 | "ipmi_si_intf:" | |
3126 | " Unable to register system interface device:" | |
3127 | " %d\n", | |
3128 | rv); | |
453823ba | 3129 | goto out_err; |
50c812b2 CM |
3130 | } |
3131 | new_smi->dev_registered = 1; | |
3132 | } | |
3133 | ||
1da177e4 LT |
3134 | rv = ipmi_register_smi(&handlers, |
3135 | new_smi, | |
50c812b2 CM |
3136 | &new_smi->device_id, |
3137 | new_smi->dev, | |
759643b8 | 3138 | "bmc", |
453823ba | 3139 | new_smi->slave_addr); |
1da177e4 LT |
3140 | if (rv) { |
3141 | printk(KERN_ERR | |
3142 | "ipmi_si: Unable to register device: error %d\n", | |
3143 | rv); | |
3144 | goto out_err_stop_timer; | |
3145 | } | |
3146 | ||
3147 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
fa68be0d | 3148 | type_file_read_proc, |
99b76233 | 3149 | new_smi); |
1da177e4 LT |
3150 | if (rv) { |
3151 | printk(KERN_ERR | |
3152 | "ipmi_si: Unable to create proc entry: %d\n", | |
3153 | rv); | |
3154 | goto out_err_stop_timer; | |
3155 | } | |
3156 | ||
3157 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
fa68be0d | 3158 | stat_file_read_proc, |
99b76233 | 3159 | new_smi); |
1da177e4 LT |
3160 | if (rv) { |
3161 | printk(KERN_ERR | |
3162 | "ipmi_si: Unable to create proc entry: %d\n", | |
3163 | rv); | |
3164 | goto out_err_stop_timer; | |
3165 | } | |
3166 | ||
b361e27b | 3167 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
fa68be0d | 3168 | param_read_proc, |
99b76233 | 3169 | new_smi); |
b361e27b CM |
3170 | if (rv) { |
3171 | printk(KERN_ERR | |
3172 | "ipmi_si: Unable to create proc entry: %d\n", | |
3173 | rv); | |
3174 | goto out_err_stop_timer; | |
3175 | } | |
3176 | ||
b0defcdb CM |
3177 | list_add_tail(&new_smi->link, &smi_infos); |
3178 | ||
d6dfd131 | 3179 | mutex_unlock(&smi_infos_lock); |
1da177e4 | 3180 | |
c305e3d3 CM |
3181 | printk(KERN_INFO "IPMI %s interface initialized\n", |
3182 | si_to_str[new_smi->si_type]); | |
1da177e4 LT |
3183 | |
3184 | return 0; | |
3185 | ||
3186 | out_err_stop_timer: | |
a9a2c44f CM |
3187 | atomic_inc(&new_smi->stop_operation); |
3188 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
3189 | |
3190 | out_err: | |
3191 | if (new_smi->intf) | |
3192 | ipmi_unregister_smi(new_smi->intf); | |
3193 | ||
b0defcdb CM |
3194 | if (new_smi->irq_cleanup) |
3195 | new_smi->irq_cleanup(new_smi); | |
1da177e4 | 3196 | |
c305e3d3 CM |
3197 | /* |
3198 | * Wait until we know that we are out of any interrupt | |
3199 | * handlers might have been running before we freed the | |
3200 | * interrupt. | |
3201 | */ | |
fbd568a3 | 3202 | synchronize_sched(); |
1da177e4 LT |
3203 | |
3204 | if (new_smi->si_sm) { | |
3205 | if (new_smi->handlers) | |
3206 | new_smi->handlers->cleanup(new_smi->si_sm); | |
3207 | kfree(new_smi->si_sm); | |
3208 | } | |
b0defcdb CM |
3209 | if (new_smi->addr_source_cleanup) |
3210 | new_smi->addr_source_cleanup(new_smi); | |
7767e126 PG |
3211 | if (new_smi->io_cleanup) |
3212 | new_smi->io_cleanup(new_smi); | |
1da177e4 | 3213 | |
50c812b2 CM |
3214 | if (new_smi->dev_registered) |
3215 | platform_device_unregister(new_smi->pdev); | |
3216 | ||
3217 | kfree(new_smi); | |
3218 | ||
d6dfd131 | 3219 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3220 | |
1da177e4 LT |
3221 | return rv; |
3222 | } | |
3223 | ||
b0defcdb | 3224 | static __devinit int init_ipmi_si(void) |
1da177e4 | 3225 | { |
1da177e4 LT |
3226 | int i; |
3227 | char *str; | |
50c812b2 | 3228 | int rv; |
1da177e4 LT |
3229 | |
3230 | if (initialized) | |
3231 | return 0; | |
3232 | initialized = 1; | |
3233 | ||
50c812b2 | 3234 | /* Register the device drivers. */ |
fe2d5ffc | 3235 | rv = driver_register(&ipmi_driver.driver); |
50c812b2 CM |
3236 | if (rv) { |
3237 | printk(KERN_ERR | |
3238 | "init_ipmi_si: Unable to register driver: %d\n", | |
3239 | rv); | |
3240 | return rv; | |
3241 | } | |
3242 | ||
3243 | ||
1da177e4 LT |
3244 | /* Parse out the si_type string into its components. */ |
3245 | str = si_type_str; | |
3246 | if (*str != '\0') { | |
e8b33617 | 3247 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
3248 | si_type[i] = str; |
3249 | str = strchr(str, ','); | |
3250 | if (str) { | |
3251 | *str = '\0'; | |
3252 | str++; | |
3253 | } else { | |
3254 | break; | |
3255 | } | |
3256 | } | |
3257 | } | |
3258 | ||
1fdd75bd | 3259 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 3260 | |
b0defcdb CM |
3261 | hardcode_find_bmc(); |
3262 | ||
a9fad4cc | 3263 | #ifdef CONFIG_DMI |
b224cd3a | 3264 | dmi_find_bmc(); |
1da177e4 LT |
3265 | #endif |
3266 | ||
b0defcdb | 3267 | #ifdef CONFIG_ACPI |
18a3e0bf | 3268 | spmi_find_bmc(); |
b0defcdb | 3269 | #endif |
27d0567a | 3270 | #ifdef CONFIG_ACPI |
9e368fa0 BH |
3271 | pnp_register_driver(&ipmi_pnp_driver); |
3272 | #endif | |
1da177e4 | 3273 | |
b0defcdb | 3274 | #ifdef CONFIG_PCI |
168b35a7 | 3275 | rv = pci_register_driver(&ipmi_pci_driver); |
c305e3d3 | 3276 | if (rv) |
168b35a7 CM |
3277 | printk(KERN_ERR |
3278 | "init_ipmi_si: Unable to register PCI driver: %d\n", | |
3279 | rv); | |
b0defcdb CM |
3280 | #endif |
3281 | ||
dba9b4f6 CM |
3282 | #ifdef CONFIG_PPC_OF |
3283 | of_register_platform_driver(&ipmi_of_platform_driver); | |
3284 | #endif | |
3285 | ||
b0defcdb | 3286 | if (si_trydefaults) { |
d6dfd131 | 3287 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3288 | if (list_empty(&smi_infos)) { |
3289 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 3290 | mutex_unlock(&smi_infos_lock); |
b0defcdb CM |
3291 | default_find_bmc(); |
3292 | } else { | |
d6dfd131 | 3293 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3294 | } |
1da177e4 LT |
3295 | } |
3296 | ||
d6dfd131 | 3297 | mutex_lock(&smi_infos_lock); |
b361e27b | 3298 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 3299 | mutex_unlock(&smi_infos_lock); |
b0defcdb CM |
3300 | #ifdef CONFIG_PCI |
3301 | pci_unregister_driver(&ipmi_pci_driver); | |
3302 | #endif | |
10fb62e5 CK |
3303 | |
3304 | #ifdef CONFIG_PPC_OF | |
3305 | of_unregister_platform_driver(&ipmi_of_platform_driver); | |
3306 | #endif | |
fe2d5ffc | 3307 | driver_unregister(&ipmi_driver.driver); |
c305e3d3 CM |
3308 | printk(KERN_WARNING |
3309 | "ipmi_si: Unable to find any System Interface(s)\n"); | |
1da177e4 | 3310 | return -ENODEV; |
b0defcdb | 3311 | } else { |
d6dfd131 | 3312 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3313 | return 0; |
1da177e4 | 3314 | } |
1da177e4 LT |
3315 | } |
3316 | module_init(init_ipmi_si); | |
3317 | ||
b361e27b | 3318 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 LT |
3319 | { |
3320 | int rv; | |
3321 | unsigned long flags; | |
3322 | ||
b0defcdb | 3323 | if (!to_clean) |
1da177e4 LT |
3324 | return; |
3325 | ||
b0defcdb CM |
3326 | list_del(&to_clean->link); |
3327 | ||
ee6cd5f8 | 3328 | /* Tell the driver that we are shutting down. */ |
a9a2c44f | 3329 | atomic_inc(&to_clean->stop_operation); |
b0defcdb | 3330 | |
c305e3d3 CM |
3331 | /* |
3332 | * Make sure the timer and thread are stopped and will not run | |
3333 | * again. | |
3334 | */ | |
a9a2c44f | 3335 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 3336 | |
c305e3d3 CM |
3337 | /* |
3338 | * Timeouts are stopped, now make sure the interrupts are off | |
3339 | * for the device. A little tricky with locks to make sure | |
3340 | * there are no races. | |
3341 | */ | |
ee6cd5f8 CM |
3342 | spin_lock_irqsave(&to_clean->si_lock, flags); |
3343 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3344 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3345 | poll(to_clean); | |
3346 | schedule_timeout_uninterruptible(1); | |
3347 | spin_lock_irqsave(&to_clean->si_lock, flags); | |
3348 | } | |
3349 | disable_si_irq(to_clean); | |
3350 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3351 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3352 | poll(to_clean); | |
3353 | schedule_timeout_uninterruptible(1); | |
3354 | } | |
3355 | ||
3356 | /* Clean up interrupts and make sure that everything is done. */ | |
3357 | if (to_clean->irq_cleanup) | |
3358 | to_clean->irq_cleanup(to_clean); | |
e8b33617 | 3359 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 3360 | poll(to_clean); |
da4cd8df | 3361 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
3362 | } |
3363 | ||
3364 | rv = ipmi_unregister_smi(to_clean->intf); | |
3365 | if (rv) { | |
3366 | printk(KERN_ERR | |
3367 | "ipmi_si: Unable to unregister device: errno=%d\n", | |
3368 | rv); | |
3369 | } | |
3370 | ||
3371 | to_clean->handlers->cleanup(to_clean->si_sm); | |
3372 | ||
3373 | kfree(to_clean->si_sm); | |
3374 | ||
b0defcdb CM |
3375 | if (to_clean->addr_source_cleanup) |
3376 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
3377 | if (to_clean->io_cleanup) |
3378 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
3379 | |
3380 | if (to_clean->dev_registered) | |
3381 | platform_device_unregister(to_clean->pdev); | |
3382 | ||
3383 | kfree(to_clean); | |
1da177e4 LT |
3384 | } |
3385 | ||
3386 | static __exit void cleanup_ipmi_si(void) | |
3387 | { | |
b0defcdb | 3388 | struct smi_info *e, *tmp_e; |
1da177e4 | 3389 | |
b0defcdb | 3390 | if (!initialized) |
1da177e4 LT |
3391 | return; |
3392 | ||
b0defcdb CM |
3393 | #ifdef CONFIG_PCI |
3394 | pci_unregister_driver(&ipmi_pci_driver); | |
3395 | #endif | |
27d0567a | 3396 | #ifdef CONFIG_ACPI |
9e368fa0 BH |
3397 | pnp_unregister_driver(&ipmi_pnp_driver); |
3398 | #endif | |
b0defcdb | 3399 | |
dba9b4f6 CM |
3400 | #ifdef CONFIG_PPC_OF |
3401 | of_unregister_platform_driver(&ipmi_of_platform_driver); | |
3402 | #endif | |
3403 | ||
d6dfd131 | 3404 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3405 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
3406 | cleanup_one_si(e); | |
d6dfd131 | 3407 | mutex_unlock(&smi_infos_lock); |
50c812b2 | 3408 | |
fe2d5ffc | 3409 | driver_unregister(&ipmi_driver.driver); |
1da177e4 LT |
3410 | } |
3411 | module_exit(cleanup_ipmi_si); | |
3412 | ||
3413 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 3414 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
3415 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
3416 | " system interfaces."); |