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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> | |
1da177e4 | 44 | #include <linux/sched.h> |
07412736 | 45 | #include <linux/seq_file.h> |
1da177e4 LT |
46 | #include <linux/timer.h> |
47 | #include <linux/errno.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/list.h> | |
ea94027b | 52 | #include <linux/notifier.h> |
b0defcdb | 53 | #include <linux/mutex.h> |
e9a705a0 | 54 | #include <linux/kthread.h> |
1da177e4 | 55 | #include <asm/irq.h> |
1da177e4 LT |
56 | #include <linux/interrupt.h> |
57 | #include <linux/rcupdate.h> | |
16f4232c | 58 | #include <linux/ipmi.h> |
1da177e4 | 59 | #include <linux/ipmi_smi.h> |
1e89a499 | 60 | #include "ipmi_si.h" |
b361e27b CM |
61 | #include <linux/string.h> |
62 | #include <linux/ctype.h> | |
dba9b4f6 | 63 | |
b361e27b | 64 | #define PFX "ipmi_si: " |
1da177e4 LT |
65 | |
66 | /* Measure times between events in the driver. */ | |
67 | #undef DEBUG_TIMING | |
68 | ||
69 | /* Call every 10 ms. */ | |
70 | #define SI_TIMEOUT_TIME_USEC 10000 | |
71 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
72 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
73 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
c305e3d3 | 74 | short timeout */ |
1da177e4 LT |
75 | |
76 | enum si_intf_state { | |
77 | SI_NORMAL, | |
78 | SI_GETTING_FLAGS, | |
79 | SI_GETTING_EVENTS, | |
80 | SI_CLEARING_FLAGS, | |
1da177e4 | 81 | SI_GETTING_MESSAGES, |
d9b7e4f7 CM |
82 | SI_CHECKING_ENABLES, |
83 | SI_SETTING_ENABLES | |
1da177e4 LT |
84 | /* FIXME - add watchdog stuff. */ |
85 | }; | |
86 | ||
9dbf68f9 CM |
87 | /* Some BT-specific defines we need here. */ |
88 | #define IPMI_BT_INTMASK_REG 2 | |
89 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
90 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
91 | ||
95e300c0 | 92 | static const char * const si_to_str[] = { "invalid", "kcs", "smic", "bt" }; |
1da177e4 | 93 | |
bb398a4c CM |
94 | static int initialized; |
95 | ||
64959e2d CM |
96 | /* |
97 | * Indexes into stats[] in smi_info below. | |
98 | */ | |
ba8ff1c6 CM |
99 | enum si_stat_indexes { |
100 | /* | |
101 | * Number of times the driver requested a timer while an operation | |
102 | * was in progress. | |
103 | */ | |
104 | SI_STAT_short_timeouts = 0, | |
105 | ||
106 | /* | |
107 | * Number of times the driver requested a timer while nothing was in | |
108 | * progress. | |
109 | */ | |
110 | SI_STAT_long_timeouts, | |
111 | ||
112 | /* Number of times the interface was idle while being polled. */ | |
113 | SI_STAT_idles, | |
114 | ||
115 | /* Number of interrupts the driver handled. */ | |
116 | SI_STAT_interrupts, | |
117 | ||
118 | /* Number of time the driver got an ATTN from the hardware. */ | |
119 | SI_STAT_attentions, | |
64959e2d | 120 | |
ba8ff1c6 CM |
121 | /* Number of times the driver requested flags from the hardware. */ |
122 | SI_STAT_flag_fetches, | |
123 | ||
124 | /* Number of times the hardware didn't follow the state machine. */ | |
125 | SI_STAT_hosed_count, | |
126 | ||
127 | /* Number of completed messages. */ | |
128 | SI_STAT_complete_transactions, | |
129 | ||
130 | /* Number of IPMI events received from the hardware. */ | |
131 | SI_STAT_events, | |
132 | ||
133 | /* Number of watchdog pretimeouts. */ | |
134 | SI_STAT_watchdog_pretimeouts, | |
135 | ||
b3834be5 | 136 | /* Number of asynchronous messages received. */ |
ba8ff1c6 CM |
137 | SI_STAT_incoming_messages, |
138 | ||
139 | ||
140 | /* This *must* remain last, add new values above this. */ | |
141 | SI_NUM_STATS | |
142 | }; | |
64959e2d | 143 | |
c305e3d3 | 144 | struct smi_info { |
a9a2c44f | 145 | int intf_num; |
1da177e4 LT |
146 | ipmi_smi_t intf; |
147 | struct si_sm_data *si_sm; | |
81d02b7f | 148 | const struct si_sm_handlers *handlers; |
1da177e4 | 149 | spinlock_t si_lock; |
b874b985 | 150 | struct ipmi_smi_msg *waiting_msg; |
1da177e4 LT |
151 | struct ipmi_smi_msg *curr_msg; |
152 | enum si_intf_state si_state; | |
153 | ||
c305e3d3 CM |
154 | /* |
155 | * Used to handle the various types of I/O that can occur with | |
156 | * IPMI | |
157 | */ | |
1da177e4 | 158 | struct si_sm_io io; |
1da177e4 | 159 | |
c305e3d3 CM |
160 | /* |
161 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
162 | * when handle_flags() needs to be re-run or 0 indicating it | |
163 | * set si_state itself. | |
164 | */ | |
3ae0e0f9 CM |
165 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
166 | ||
c305e3d3 CM |
167 | /* |
168 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
169 | * is set to hold the flags until we are done handling everything | |
170 | * from the flags. | |
171 | */ | |
1da177e4 LT |
172 | #define RECEIVE_MSG_AVAIL 0x01 |
173 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
174 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
175 | #define OEM0_DATA_AVAIL 0x20 |
176 | #define OEM1_DATA_AVAIL 0x40 | |
177 | #define OEM2_DATA_AVAIL 0x80 | |
178 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
179 | OEM1_DATA_AVAIL | \ |
180 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
181 | unsigned char msg_flags; |
182 | ||
40112ae7 | 183 | /* Does the BMC have an event buffer? */ |
7aefac26 | 184 | bool has_event_buffer; |
40112ae7 | 185 | |
c305e3d3 CM |
186 | /* |
187 | * If set to true, this will request events the next time the | |
188 | * state machine is idle. | |
189 | */ | |
1da177e4 LT |
190 | atomic_t req_events; |
191 | ||
c305e3d3 CM |
192 | /* |
193 | * If true, run the state machine to completion on every send | |
194 | * call. Generally used after a panic to make sure stuff goes | |
195 | * out. | |
196 | */ | |
7aefac26 | 197 | bool run_to_completion; |
1da177e4 | 198 | |
1da177e4 LT |
199 | /* The timer for this si. */ |
200 | struct timer_list si_timer; | |
201 | ||
48e8ac29 BS |
202 | /* This flag is set, if the timer is running (timer_pending() isn't enough) */ |
203 | bool timer_running; | |
204 | ||
1da177e4 LT |
205 | /* The time (in jiffies) the last timeout occurred at. */ |
206 | unsigned long last_timeout_jiffies; | |
207 | ||
89986496 CM |
208 | /* Are we waiting for the events, pretimeouts, received msgs? */ |
209 | atomic_t need_watch; | |
210 | ||
c305e3d3 CM |
211 | /* |
212 | * The driver will disable interrupts when it gets into a | |
213 | * situation where it cannot handle messages due to lack of | |
214 | * memory. Once that situation clears up, it will re-enable | |
215 | * interrupts. | |
216 | */ | |
7aefac26 | 217 | bool interrupt_disabled; |
1da177e4 | 218 | |
d9b7e4f7 CM |
219 | /* |
220 | * Does the BMC support events? | |
221 | */ | |
222 | bool supports_event_msg_buff; | |
223 | ||
1e7d6a45 | 224 | /* |
d0882897 CM |
225 | * Can we disable interrupts the global enables receive irq |
226 | * bit? There are currently two forms of brokenness, some | |
227 | * systems cannot disable the bit (which is technically within | |
228 | * the spec but a bad idea) and some systems have the bit | |
229 | * forced to zero even though interrupts work (which is | |
230 | * clearly outside the spec). The next bool tells which form | |
231 | * of brokenness is present. | |
1e7d6a45 | 232 | */ |
d0882897 CM |
233 | bool cannot_disable_irq; |
234 | ||
235 | /* | |
236 | * Some systems are broken and cannot set the irq enable | |
237 | * bit, even if they support interrupts. | |
238 | */ | |
239 | bool irq_enable_broken; | |
1e7d6a45 | 240 | |
a8df150c CM |
241 | /* |
242 | * Did we get an attention that we did not handle? | |
243 | */ | |
244 | bool got_attn; | |
245 | ||
50c812b2 | 246 | /* From the get device id response... */ |
3ae0e0f9 | 247 | struct ipmi_device_id device_id; |
1da177e4 | 248 | |
910840f2 | 249 | /* Default driver model device. */ |
50c812b2 CM |
250 | struct platform_device *pdev; |
251 | ||
1da177e4 | 252 | /* Counters and things for the proc filesystem. */ |
64959e2d | 253 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 254 | |
c305e3d3 | 255 | struct task_struct *thread; |
b0defcdb CM |
256 | |
257 | struct list_head link; | |
1da177e4 LT |
258 | }; |
259 | ||
64959e2d CM |
260 | #define smi_inc_stat(smi, stat) \ |
261 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
262 | #define smi_get_stat(smi, stat) \ | |
263 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
264 | ||
7a453308 CM |
265 | #define IPMI_MAX_INTFS 4 |
266 | static int force_kipmid[IPMI_MAX_INTFS]; | |
a51f4a81 CM |
267 | static int num_force_kipmid; |
268 | ||
7a453308 | 269 | static unsigned int kipmid_max_busy_us[IPMI_MAX_INTFS]; |
ae74e823 MW |
270 | static int num_max_busy_us; |
271 | ||
7aefac26 | 272 | static bool unload_when_empty = true; |
b361e27b | 273 | |
b0defcdb | 274 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 275 | static void cleanup_one_si(struct smi_info *to_clean); |
d2478521 | 276 | static void cleanup_ipmi_si(void); |
b0defcdb | 277 | |
f93aae9f JS |
278 | #ifdef DEBUG_TIMING |
279 | void debug_timestamp(char *msg) | |
280 | { | |
48862ea2 | 281 | struct timespec64 t; |
f93aae9f | 282 | |
48862ea2 JS |
283 | getnstimeofday64(&t); |
284 | pr_debug("**%s: %lld.%9.9ld\n", msg, (long long) t.tv_sec, t.tv_nsec); | |
f93aae9f JS |
285 | } |
286 | #else | |
287 | #define debug_timestamp(x) | |
288 | #endif | |
289 | ||
e041c683 | 290 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 291 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 292 | { |
e041c683 | 293 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
294 | } |
295 | ||
1da177e4 LT |
296 | static void deliver_recv_msg(struct smi_info *smi_info, |
297 | struct ipmi_smi_msg *msg) | |
298 | { | |
7adf579c | 299 | /* Deliver the message to the upper layer. */ |
968bf7cc CM |
300 | if (smi_info->intf) |
301 | ipmi_smi_msg_received(smi_info->intf, msg); | |
302 | else | |
303 | ipmi_free_smi_msg(msg); | |
1da177e4 LT |
304 | } |
305 | ||
4d7cbac7 | 306 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
307 | { |
308 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
309 | ||
4d7cbac7 CM |
310 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
311 | cCode = IPMI_ERR_UNSPECIFIED; | |
312 | /* else use it as is */ | |
313 | ||
25985edc | 314 | /* Make it a response */ |
1da177e4 LT |
315 | msg->rsp[0] = msg->data[0] | 4; |
316 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 317 | msg->rsp[2] = cCode; |
1da177e4 LT |
318 | msg->rsp_size = 3; |
319 | ||
320 | smi_info->curr_msg = NULL; | |
321 | deliver_recv_msg(smi_info, msg); | |
322 | } | |
323 | ||
324 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
325 | { | |
326 | int rv; | |
1da177e4 | 327 | |
b874b985 | 328 | if (!smi_info->waiting_msg) { |
1da177e4 LT |
329 | smi_info->curr_msg = NULL; |
330 | rv = SI_SM_IDLE; | |
331 | } else { | |
332 | int err; | |
333 | ||
b874b985 CM |
334 | smi_info->curr_msg = smi_info->waiting_msg; |
335 | smi_info->waiting_msg = NULL; | |
f93aae9f | 336 | debug_timestamp("Start2"); |
e041c683 AS |
337 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
338 | 0, smi_info); | |
ea94027b CM |
339 | if (err & NOTIFY_STOP_MASK) { |
340 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
341 | goto out; | |
342 | } | |
1da177e4 LT |
343 | err = smi_info->handlers->start_transaction( |
344 | smi_info->si_sm, | |
345 | smi_info->curr_msg->data, | |
346 | smi_info->curr_msg->data_size); | |
c305e3d3 | 347 | if (err) |
4d7cbac7 | 348 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
349 | |
350 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
351 | } | |
76824852 | 352 | out: |
1da177e4 LT |
353 | return rv; |
354 | } | |
355 | ||
0cfec916 CM |
356 | static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val) |
357 | { | |
358 | smi_info->last_timeout_jiffies = jiffies; | |
359 | mod_timer(&smi_info->si_timer, new_val); | |
360 | smi_info->timer_running = true; | |
361 | } | |
362 | ||
363 | /* | |
364 | * Start a new message and (re)start the timer and thread. | |
365 | */ | |
366 | static void start_new_msg(struct smi_info *smi_info, unsigned char *msg, | |
367 | unsigned int size) | |
368 | { | |
369 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); | |
370 | ||
371 | if (smi_info->thread) | |
372 | wake_up_process(smi_info->thread); | |
373 | ||
374 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, size); | |
375 | } | |
376 | ||
377 | static void start_check_enables(struct smi_info *smi_info, bool start_timer) | |
ee6cd5f8 CM |
378 | { |
379 | unsigned char msg[2]; | |
380 | ||
381 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
382 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
383 | ||
0cfec916 CM |
384 | if (start_timer) |
385 | start_new_msg(smi_info, msg, 2); | |
386 | else | |
387 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
d9b7e4f7 | 388 | smi_info->si_state = SI_CHECKING_ENABLES; |
ee6cd5f8 CM |
389 | } |
390 | ||
0cfec916 | 391 | static void start_clear_flags(struct smi_info *smi_info, bool start_timer) |
1da177e4 LT |
392 | { |
393 | unsigned char msg[3]; | |
394 | ||
395 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
396 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
397 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
398 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
399 | ||
0cfec916 CM |
400 | if (start_timer) |
401 | start_new_msg(smi_info, msg, 3); | |
402 | else | |
403 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
1da177e4 LT |
404 | smi_info->si_state = SI_CLEARING_FLAGS; |
405 | } | |
406 | ||
968bf7cc CM |
407 | static void start_getting_msg_queue(struct smi_info *smi_info) |
408 | { | |
409 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
410 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
411 | smi_info->curr_msg->data_size = 2; | |
412 | ||
0cfec916 CM |
413 | start_new_msg(smi_info, smi_info->curr_msg->data, |
414 | smi_info->curr_msg->data_size); | |
968bf7cc CM |
415 | smi_info->si_state = SI_GETTING_MESSAGES; |
416 | } | |
417 | ||
418 | static void start_getting_events(struct smi_info *smi_info) | |
419 | { | |
420 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
421 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
422 | smi_info->curr_msg->data_size = 2; | |
423 | ||
0cfec916 CM |
424 | start_new_msg(smi_info, smi_info->curr_msg->data, |
425 | smi_info->curr_msg->data_size); | |
968bf7cc CM |
426 | smi_info->si_state = SI_GETTING_EVENTS; |
427 | } | |
428 | ||
c305e3d3 CM |
429 | /* |
430 | * When we have a situtaion where we run out of memory and cannot | |
431 | * allocate messages, we just leave them in the BMC and run the system | |
432 | * polled until we can allocate some memory. Once we have some | |
433 | * memory, we will re-enable the interrupt. | |
1e7d6a45 CM |
434 | * |
435 | * Note that we cannot just use disable_irq(), since the interrupt may | |
436 | * be shared. | |
c305e3d3 | 437 | */ |
0cfec916 | 438 | static inline bool disable_si_irq(struct smi_info *smi_info, bool start_timer) |
1da177e4 | 439 | { |
910840f2 | 440 | if ((smi_info->io.irq) && (!smi_info->interrupt_disabled)) { |
7aefac26 | 441 | smi_info->interrupt_disabled = true; |
0cfec916 | 442 | start_check_enables(smi_info, start_timer); |
968bf7cc | 443 | return true; |
1da177e4 | 444 | } |
968bf7cc | 445 | return false; |
1da177e4 LT |
446 | } |
447 | ||
968bf7cc | 448 | static inline bool enable_si_irq(struct smi_info *smi_info) |
1da177e4 | 449 | { |
910840f2 | 450 | if ((smi_info->io.irq) && (smi_info->interrupt_disabled)) { |
7aefac26 | 451 | smi_info->interrupt_disabled = false; |
0cfec916 | 452 | start_check_enables(smi_info, true); |
968bf7cc CM |
453 | return true; |
454 | } | |
455 | return false; | |
456 | } | |
457 | ||
458 | /* | |
459 | * Allocate a message. If unable to allocate, start the interrupt | |
460 | * disable process and return NULL. If able to allocate but | |
461 | * interrupts are disabled, free the message and return NULL after | |
462 | * starting the interrupt enable process. | |
463 | */ | |
464 | static struct ipmi_smi_msg *alloc_msg_handle_irq(struct smi_info *smi_info) | |
465 | { | |
466 | struct ipmi_smi_msg *msg; | |
467 | ||
468 | msg = ipmi_alloc_smi_msg(); | |
469 | if (!msg) { | |
0cfec916 | 470 | if (!disable_si_irq(smi_info, true)) |
968bf7cc CM |
471 | smi_info->si_state = SI_NORMAL; |
472 | } else if (enable_si_irq(smi_info)) { | |
473 | ipmi_free_smi_msg(msg); | |
474 | msg = NULL; | |
1da177e4 | 475 | } |
968bf7cc | 476 | return msg; |
1da177e4 LT |
477 | } |
478 | ||
479 | static void handle_flags(struct smi_info *smi_info) | |
480 | { | |
76824852 | 481 | retry: |
1da177e4 LT |
482 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
483 | /* Watchdog pre-timeout */ | |
64959e2d | 484 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 | 485 | |
0cfec916 | 486 | start_clear_flags(smi_info, true); |
1da177e4 | 487 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; |
968bf7cc CM |
488 | if (smi_info->intf) |
489 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
1da177e4 LT |
490 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { |
491 | /* Messages available. */ | |
968bf7cc CM |
492 | smi_info->curr_msg = alloc_msg_handle_irq(smi_info); |
493 | if (!smi_info->curr_msg) | |
1da177e4 | 494 | return; |
1da177e4 | 495 | |
968bf7cc | 496 | start_getting_msg_queue(smi_info); |
1da177e4 LT |
497 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { |
498 | /* Events available. */ | |
968bf7cc CM |
499 | smi_info->curr_msg = alloc_msg_handle_irq(smi_info); |
500 | if (!smi_info->curr_msg) | |
1da177e4 | 501 | return; |
1da177e4 | 502 | |
968bf7cc | 503 | start_getting_events(smi_info); |
4064d5ef | 504 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 505 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
506 | if (smi_info->oem_data_avail_handler(smi_info)) |
507 | goto retry; | |
c305e3d3 | 508 | } else |
1da177e4 | 509 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
510 | } |
511 | ||
d9b7e4f7 CM |
512 | /* |
513 | * Global enables we care about. | |
514 | */ | |
515 | #define GLOBAL_ENABLES_MASK (IPMI_BMC_EVT_MSG_BUFF | IPMI_BMC_RCV_MSG_INTR | \ | |
516 | IPMI_BMC_EVT_MSG_INTR) | |
517 | ||
95c97b59 CM |
518 | static u8 current_global_enables(struct smi_info *smi_info, u8 base, |
519 | bool *irq_on) | |
d9b7e4f7 CM |
520 | { |
521 | u8 enables = 0; | |
522 | ||
523 | if (smi_info->supports_event_msg_buff) | |
524 | enables |= IPMI_BMC_EVT_MSG_BUFF; | |
d9b7e4f7 | 525 | |
910840f2 | 526 | if (((smi_info->io.irq && !smi_info->interrupt_disabled) || |
d0882897 CM |
527 | smi_info->cannot_disable_irq) && |
528 | !smi_info->irq_enable_broken) | |
d9b7e4f7 | 529 | enables |= IPMI_BMC_RCV_MSG_INTR; |
d9b7e4f7 CM |
530 | |
531 | if (smi_info->supports_event_msg_buff && | |
910840f2 | 532 | smi_info->io.irq && !smi_info->interrupt_disabled && |
d0882897 | 533 | !smi_info->irq_enable_broken) |
d9b7e4f7 | 534 | enables |= IPMI_BMC_EVT_MSG_INTR; |
d9b7e4f7 | 535 | |
95c97b59 CM |
536 | *irq_on = enables & (IPMI_BMC_EVT_MSG_INTR | IPMI_BMC_RCV_MSG_INTR); |
537 | ||
d9b7e4f7 CM |
538 | return enables; |
539 | } | |
540 | ||
95c97b59 CM |
541 | static void check_bt_irq(struct smi_info *smi_info, bool irq_on) |
542 | { | |
543 | u8 irqstate = smi_info->io.inputb(&smi_info->io, IPMI_BT_INTMASK_REG); | |
544 | ||
545 | irqstate &= IPMI_BT_INTMASK_ENABLE_IRQ_BIT; | |
546 | ||
547 | if ((bool)irqstate == irq_on) | |
548 | return; | |
549 | ||
550 | if (irq_on) | |
551 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
552 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
553 | else | |
554 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, 0); | |
555 | } | |
556 | ||
1da177e4 LT |
557 | static void handle_transaction_done(struct smi_info *smi_info) |
558 | { | |
559 | struct ipmi_smi_msg *msg; | |
1da177e4 | 560 | |
f93aae9f | 561 | debug_timestamp("Done"); |
1da177e4 LT |
562 | switch (smi_info->si_state) { |
563 | case SI_NORMAL: | |
b0defcdb | 564 | if (!smi_info->curr_msg) |
1da177e4 LT |
565 | break; |
566 | ||
567 | smi_info->curr_msg->rsp_size | |
568 | = smi_info->handlers->get_result( | |
569 | smi_info->si_sm, | |
570 | smi_info->curr_msg->rsp, | |
571 | IPMI_MAX_MSG_LENGTH); | |
572 | ||
c305e3d3 CM |
573 | /* |
574 | * Do this here becase deliver_recv_msg() releases the | |
575 | * lock, and a new message can be put in during the | |
576 | * time the lock is released. | |
577 | */ | |
1da177e4 LT |
578 | msg = smi_info->curr_msg; |
579 | smi_info->curr_msg = NULL; | |
580 | deliver_recv_msg(smi_info, msg); | |
581 | break; | |
582 | ||
583 | case SI_GETTING_FLAGS: | |
584 | { | |
585 | unsigned char msg[4]; | |
586 | unsigned int len; | |
587 | ||
588 | /* We got the flags from the SMI, now handle them. */ | |
589 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
590 | if (msg[2] != 0) { | |
c305e3d3 | 591 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
592 | smi_info->si_state = SI_NORMAL; |
593 | } else if (len < 4) { | |
c305e3d3 CM |
594 | /* |
595 | * Hmm, no flags. That's technically illegal, but | |
596 | * don't use uninitialized data. | |
597 | */ | |
1da177e4 LT |
598 | smi_info->si_state = SI_NORMAL; |
599 | } else { | |
600 | smi_info->msg_flags = msg[3]; | |
601 | handle_flags(smi_info); | |
602 | } | |
603 | break; | |
604 | } | |
605 | ||
606 | case SI_CLEARING_FLAGS: | |
1da177e4 LT |
607 | { |
608 | unsigned char msg[3]; | |
609 | ||
610 | /* We cleared the flags. */ | |
611 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
612 | if (msg[2] != 0) { | |
613 | /* Error clearing flags */ | |
910840f2 | 614 | dev_warn(smi_info->io.dev, |
279fbd0c | 615 | "Error clearing flags: %2.2x\n", msg[2]); |
1da177e4 | 616 | } |
d9b7e4f7 | 617 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
618 | break; |
619 | } | |
620 | ||
621 | case SI_GETTING_EVENTS: | |
622 | { | |
623 | smi_info->curr_msg->rsp_size | |
624 | = smi_info->handlers->get_result( | |
625 | smi_info->si_sm, | |
626 | smi_info->curr_msg->rsp, | |
627 | IPMI_MAX_MSG_LENGTH); | |
628 | ||
c305e3d3 CM |
629 | /* |
630 | * Do this here becase deliver_recv_msg() releases the | |
631 | * lock, and a new message can be put in during the | |
632 | * time the lock is released. | |
633 | */ | |
1da177e4 LT |
634 | msg = smi_info->curr_msg; |
635 | smi_info->curr_msg = NULL; | |
636 | if (msg->rsp[2] != 0) { | |
637 | /* Error getting event, probably done. */ | |
638 | msg->done(msg); | |
639 | ||
640 | /* Take off the event flag. */ | |
641 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
642 | handle_flags(smi_info); | |
643 | } else { | |
64959e2d | 644 | smi_inc_stat(smi_info, events); |
1da177e4 | 645 | |
c305e3d3 CM |
646 | /* |
647 | * Do this before we deliver the message | |
648 | * because delivering the message releases the | |
649 | * lock and something else can mess with the | |
650 | * state. | |
651 | */ | |
1da177e4 LT |
652 | handle_flags(smi_info); |
653 | ||
654 | deliver_recv_msg(smi_info, msg); | |
655 | } | |
656 | break; | |
657 | } | |
658 | ||
659 | case SI_GETTING_MESSAGES: | |
660 | { | |
661 | smi_info->curr_msg->rsp_size | |
662 | = smi_info->handlers->get_result( | |
663 | smi_info->si_sm, | |
664 | smi_info->curr_msg->rsp, | |
665 | IPMI_MAX_MSG_LENGTH); | |
666 | ||
c305e3d3 CM |
667 | /* |
668 | * Do this here becase deliver_recv_msg() releases the | |
669 | * lock, and a new message can be put in during the | |
670 | * time the lock is released. | |
671 | */ | |
1da177e4 LT |
672 | msg = smi_info->curr_msg; |
673 | smi_info->curr_msg = NULL; | |
674 | if (msg->rsp[2] != 0) { | |
675 | /* Error getting event, probably done. */ | |
676 | msg->done(msg); | |
677 | ||
678 | /* Take off the msg flag. */ | |
679 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
680 | handle_flags(smi_info); | |
681 | } else { | |
64959e2d | 682 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 683 | |
c305e3d3 CM |
684 | /* |
685 | * Do this before we deliver the message | |
686 | * because delivering the message releases the | |
687 | * lock and something else can mess with the | |
688 | * state. | |
689 | */ | |
1da177e4 LT |
690 | handle_flags(smi_info); |
691 | ||
692 | deliver_recv_msg(smi_info, msg); | |
693 | } | |
694 | break; | |
695 | } | |
696 | ||
d9b7e4f7 | 697 | case SI_CHECKING_ENABLES: |
1da177e4 LT |
698 | { |
699 | unsigned char msg[4]; | |
d9b7e4f7 | 700 | u8 enables; |
95c97b59 | 701 | bool irq_on; |
1da177e4 LT |
702 | |
703 | /* We got the flags from the SMI, now handle them. */ | |
704 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
705 | if (msg[2] != 0) { | |
910840f2 | 706 | dev_warn(smi_info->io.dev, |
0849bfec | 707 | "Couldn't get irq info: %x.\n", msg[2]); |
910840f2 | 708 | dev_warn(smi_info->io.dev, |
0849bfec | 709 | "Maybe ok, but ipmi might run very slowly.\n"); |
1da177e4 | 710 | smi_info->si_state = SI_NORMAL; |
d9b7e4f7 CM |
711 | break; |
712 | } | |
95c97b59 | 713 | enables = current_global_enables(smi_info, 0, &irq_on); |
910840f2 | 714 | if (smi_info->io.si_type == SI_BT) |
95c97b59 CM |
715 | /* BT has its own interrupt enable bit. */ |
716 | check_bt_irq(smi_info, irq_on); | |
d9b7e4f7 CM |
717 | if (enables != (msg[3] & GLOBAL_ENABLES_MASK)) { |
718 | /* Enables are not correct, fix them. */ | |
1da177e4 LT |
719 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
720 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
d9b7e4f7 | 721 | msg[2] = enables | (msg[3] & ~GLOBAL_ENABLES_MASK); |
1da177e4 LT |
722 | smi_info->handlers->start_transaction( |
723 | smi_info->si_sm, msg, 3); | |
d9b7e4f7 CM |
724 | smi_info->si_state = SI_SETTING_ENABLES; |
725 | } else if (smi_info->supports_event_msg_buff) { | |
726 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
727 | if (!smi_info->curr_msg) { | |
728 | smi_info->si_state = SI_NORMAL; | |
729 | break; | |
730 | } | |
5ac7b2fc | 731 | start_getting_events(smi_info); |
d9b7e4f7 CM |
732 | } else { |
733 | smi_info->si_state = SI_NORMAL; | |
1da177e4 LT |
734 | } |
735 | break; | |
736 | } | |
737 | ||
d9b7e4f7 | 738 | case SI_SETTING_ENABLES: |
1da177e4 LT |
739 | { |
740 | unsigned char msg[4]; | |
741 | ||
1da177e4 | 742 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); |
d9b7e4f7 | 743 | if (msg[2] != 0) |
910840f2 | 744 | dev_warn(smi_info->io.dev, |
d9b7e4f7 CM |
745 | "Could not set the global enables: 0x%x.\n", |
746 | msg[2]); | |
747 | ||
748 | if (smi_info->supports_event_msg_buff) { | |
749 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
750 | if (!smi_info->curr_msg) { | |
751 | smi_info->si_state = SI_NORMAL; | |
752 | break; | |
753 | } | |
5ac7b2fc | 754 | start_getting_events(smi_info); |
ee6cd5f8 | 755 | } else { |
d9b7e4f7 | 756 | smi_info->si_state = SI_NORMAL; |
ee6cd5f8 | 757 | } |
ee6cd5f8 CM |
758 | break; |
759 | } | |
1da177e4 LT |
760 | } |
761 | } | |
762 | ||
c305e3d3 CM |
763 | /* |
764 | * Called on timeouts and events. Timeouts should pass the elapsed | |
765 | * time, interrupts should pass in zero. Must be called with | |
766 | * si_lock held and interrupts disabled. | |
767 | */ | |
1da177e4 LT |
768 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
769 | int time) | |
770 | { | |
771 | enum si_sm_result si_sm_result; | |
772 | ||
76824852 | 773 | restart: |
c305e3d3 CM |
774 | /* |
775 | * There used to be a loop here that waited a little while | |
776 | * (around 25us) before giving up. That turned out to be | |
777 | * pointless, the minimum delays I was seeing were in the 300us | |
778 | * range, which is far too long to wait in an interrupt. So | |
779 | * we just run until the state machine tells us something | |
780 | * happened or it needs a delay. | |
781 | */ | |
1da177e4 LT |
782 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
783 | time = 0; | |
784 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 785 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 786 | |
c305e3d3 | 787 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 788 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
789 | |
790 | handle_transaction_done(smi_info); | |
d9dffd2a | 791 | goto restart; |
c305e3d3 | 792 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 793 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 794 | |
c305e3d3 CM |
795 | /* |
796 | * Do the before return_hosed_msg, because that | |
797 | * releases the lock. | |
798 | */ | |
1da177e4 LT |
799 | smi_info->si_state = SI_NORMAL; |
800 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
801 | /* |
802 | * If we were handling a user message, format | |
803 | * a response to send to the upper layer to | |
804 | * tell it about the error. | |
805 | */ | |
4d7cbac7 | 806 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 | 807 | } |
d9dffd2a | 808 | goto restart; |
1da177e4 LT |
809 | } |
810 | ||
4ea18425 CM |
811 | /* |
812 | * We prefer handling attn over new messages. But don't do | |
813 | * this if there is not yet an upper layer to handle anything. | |
814 | */ | |
a8df150c CM |
815 | if (likely(smi_info->intf) && |
816 | (si_sm_result == SI_SM_ATTN || smi_info->got_attn)) { | |
1da177e4 LT |
817 | unsigned char msg[2]; |
818 | ||
a8df150c CM |
819 | if (smi_info->si_state != SI_NORMAL) { |
820 | /* | |
821 | * We got an ATTN, but we are doing something else. | |
822 | * Handle the ATTN later. | |
823 | */ | |
824 | smi_info->got_attn = true; | |
825 | } else { | |
826 | smi_info->got_attn = false; | |
827 | smi_inc_stat(smi_info, attentions); | |
1da177e4 | 828 | |
a8df150c CM |
829 | /* |
830 | * Got a attn, send down a get message flags to see | |
831 | * what's causing it. It would be better to handle | |
832 | * this in the upper layer, but due to the way | |
833 | * interrupts work with the SMI, that's not really | |
834 | * possible. | |
835 | */ | |
836 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
837 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
1da177e4 | 838 | |
0cfec916 | 839 | start_new_msg(smi_info, msg, 2); |
a8df150c CM |
840 | smi_info->si_state = SI_GETTING_FLAGS; |
841 | goto restart; | |
842 | } | |
1da177e4 LT |
843 | } |
844 | ||
845 | /* If we are currently idle, try to start the next message. */ | |
846 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 847 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
848 | |
849 | si_sm_result = start_next_msg(smi_info); | |
850 | if (si_sm_result != SI_SM_IDLE) | |
851 | goto restart; | |
c305e3d3 | 852 | } |
1da177e4 LT |
853 | |
854 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
855 | && (atomic_read(&smi_info->req_events))) { |
856 | /* | |
857 | * We are idle and the upper layer requested that I fetch | |
858 | * events, so do so. | |
859 | */ | |
55162fb1 | 860 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 861 | |
d9b7e4f7 CM |
862 | /* |
863 | * Take this opportunity to check the interrupt and | |
864 | * message enable state for the BMC. The BMC can be | |
865 | * asynchronously reset, and may thus get interrupts | |
866 | * disable and messages disabled. | |
867 | */ | |
910840f2 | 868 | if (smi_info->supports_event_msg_buff || smi_info->io.irq) { |
0cfec916 | 869 | start_check_enables(smi_info, true); |
d9b7e4f7 CM |
870 | } else { |
871 | smi_info->curr_msg = alloc_msg_handle_irq(smi_info); | |
872 | if (!smi_info->curr_msg) | |
873 | goto out; | |
1da177e4 | 874 | |
d9b7e4f7 CM |
875 | start_getting_events(smi_info); |
876 | } | |
1da177e4 LT |
877 | goto restart; |
878 | } | |
314ef52f CM |
879 | |
880 | if (si_sm_result == SI_SM_IDLE && smi_info->timer_running) { | |
881 | /* Ok it if fails, the timer will just go off. */ | |
882 | if (del_timer(&smi_info->si_timer)) | |
883 | smi_info->timer_running = false; | |
884 | } | |
885 | ||
76824852 | 886 | out: |
1da177e4 LT |
887 | return si_sm_result; |
888 | } | |
889 | ||
89986496 CM |
890 | static void check_start_timer_thread(struct smi_info *smi_info) |
891 | { | |
892 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) { | |
893 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); | |
894 | ||
895 | if (smi_info->thread) | |
896 | wake_up_process(smi_info->thread); | |
897 | ||
898 | start_next_msg(smi_info); | |
899 | smi_event_handler(smi_info, 0); | |
900 | } | |
901 | } | |
902 | ||
82802f96 | 903 | static void flush_messages(void *send_info) |
e45361d7 | 904 | { |
82802f96 | 905 | struct smi_info *smi_info = send_info; |
e45361d7 HK |
906 | enum si_sm_result result; |
907 | ||
908 | /* | |
909 | * Currently, this function is called only in run-to-completion | |
910 | * mode. This means we are single-threaded, no need for locks. | |
911 | */ | |
912 | result = smi_event_handler(smi_info, 0); | |
913 | while (result != SI_SM_IDLE) { | |
914 | udelay(SI_SHORT_TIMEOUT_USEC); | |
915 | result = smi_event_handler(smi_info, SI_SHORT_TIMEOUT_USEC); | |
916 | } | |
917 | } | |
918 | ||
1da177e4 | 919 | static void sender(void *send_info, |
99ab32f3 | 920 | struct ipmi_smi_msg *msg) |
1da177e4 LT |
921 | { |
922 | struct smi_info *smi_info = send_info; | |
1da177e4 | 923 | unsigned long flags; |
1da177e4 | 924 | |
f93aae9f | 925 | debug_timestamp("Enqueue"); |
1da177e4 LT |
926 | |
927 | if (smi_info->run_to_completion) { | |
bda4c30a | 928 | /* |
82802f96 HK |
929 | * If we are running to completion, start it. Upper |
930 | * layer will call flush_messages to clear it out. | |
bda4c30a | 931 | */ |
9f812704 | 932 | smi_info->waiting_msg = msg; |
1da177e4 | 933 | return; |
1da177e4 | 934 | } |
1da177e4 | 935 | |
f60adf42 | 936 | spin_lock_irqsave(&smi_info->si_lock, flags); |
1d86e29b CM |
937 | /* |
938 | * The following two lines don't need to be under the lock for | |
939 | * the lock's sake, but they do need SMP memory barriers to | |
940 | * avoid getting things out of order. We are already claiming | |
941 | * the lock, anyway, so just do it under the lock to avoid the | |
942 | * ordering problem. | |
943 | */ | |
944 | BUG_ON(smi_info->waiting_msg); | |
945 | smi_info->waiting_msg = msg; | |
89986496 | 946 | check_start_timer_thread(smi_info); |
bda4c30a | 947 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
948 | } |
949 | ||
7aefac26 | 950 | static void set_run_to_completion(void *send_info, bool i_run_to_completion) |
1da177e4 LT |
951 | { |
952 | struct smi_info *smi_info = send_info; | |
1da177e4 LT |
953 | |
954 | smi_info->run_to_completion = i_run_to_completion; | |
e45361d7 HK |
955 | if (i_run_to_completion) |
956 | flush_messages(smi_info); | |
1da177e4 LT |
957 | } |
958 | ||
ae74e823 MW |
959 | /* |
960 | * Use -1 in the nsec value of the busy waiting timespec to tell that | |
961 | * we are spinning in kipmid looking for something and not delaying | |
962 | * between checks | |
963 | */ | |
48862ea2 | 964 | static inline void ipmi_si_set_not_busy(struct timespec64 *ts) |
ae74e823 MW |
965 | { |
966 | ts->tv_nsec = -1; | |
967 | } | |
48862ea2 | 968 | static inline int ipmi_si_is_busy(struct timespec64 *ts) |
ae74e823 MW |
969 | { |
970 | return ts->tv_nsec != -1; | |
971 | } | |
972 | ||
cc4cbe90 AB |
973 | static inline int ipmi_thread_busy_wait(enum si_sm_result smi_result, |
974 | const struct smi_info *smi_info, | |
48862ea2 | 975 | struct timespec64 *busy_until) |
ae74e823 MW |
976 | { |
977 | unsigned int max_busy_us = 0; | |
978 | ||
979 | if (smi_info->intf_num < num_max_busy_us) | |
980 | max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; | |
981 | if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) | |
982 | ipmi_si_set_not_busy(busy_until); | |
983 | else if (!ipmi_si_is_busy(busy_until)) { | |
48862ea2 JS |
984 | getnstimeofday64(busy_until); |
985 | timespec64_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); | |
ae74e823 | 986 | } else { |
48862ea2 JS |
987 | struct timespec64 now; |
988 | ||
989 | getnstimeofday64(&now); | |
990 | if (unlikely(timespec64_compare(&now, busy_until) > 0)) { | |
ae74e823 MW |
991 | ipmi_si_set_not_busy(busy_until); |
992 | return 0; | |
993 | } | |
994 | } | |
995 | return 1; | |
996 | } | |
997 | ||
998 | ||
999 | /* | |
1000 | * A busy-waiting loop for speeding up IPMI operation. | |
1001 | * | |
1002 | * Lousy hardware makes this hard. This is only enabled for systems | |
1003 | * that are not BT and do not have interrupts. It starts spinning | |
1004 | * when an operation is complete or until max_busy tells it to stop | |
1005 | * (if that is enabled). See the paragraph on kimid_max_busy_us in | |
1006 | * Documentation/IPMI.txt for details. | |
1007 | */ | |
a9a2c44f CM |
1008 | static int ipmi_thread(void *data) |
1009 | { | |
1010 | struct smi_info *smi_info = data; | |
e9a705a0 | 1011 | unsigned long flags; |
a9a2c44f | 1012 | enum si_sm_result smi_result; |
48862ea2 | 1013 | struct timespec64 busy_until; |
a9a2c44f | 1014 | |
ae74e823 | 1015 | ipmi_si_set_not_busy(&busy_until); |
8698a745 | 1016 | set_user_nice(current, MAX_NICE); |
e9a705a0 | 1017 | while (!kthread_should_stop()) { |
ae74e823 MW |
1018 | int busy_wait; |
1019 | ||
a9a2c44f | 1020 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 1021 | smi_result = smi_event_handler(smi_info, 0); |
48e8ac29 BS |
1022 | |
1023 | /* | |
1024 | * If the driver is doing something, there is a possible | |
1025 | * race with the timer. If the timer handler see idle, | |
1026 | * and the thread here sees something else, the timer | |
1027 | * handler won't restart the timer even though it is | |
1028 | * required. So start it here if necessary. | |
1029 | */ | |
1030 | if (smi_result != SI_SM_IDLE && !smi_info->timer_running) | |
1031 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); | |
1032 | ||
a9a2c44f | 1033 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
ae74e823 MW |
1034 | busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, |
1035 | &busy_until); | |
c305e3d3 CM |
1036 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
1037 | ; /* do nothing */ | |
ae74e823 | 1038 | else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) |
33979734 | 1039 | schedule(); |
89986496 CM |
1040 | else if (smi_result == SI_SM_IDLE) { |
1041 | if (atomic_read(&smi_info->need_watch)) { | |
1042 | schedule_timeout_interruptible(100); | |
1043 | } else { | |
1044 | /* Wait to be woken up when we are needed. */ | |
1045 | __set_current_state(TASK_INTERRUPTIBLE); | |
1046 | schedule(); | |
1047 | } | |
1048 | } else | |
8d1f66dc | 1049 | schedule_timeout_interruptible(1); |
a9a2c44f | 1050 | } |
a9a2c44f CM |
1051 | return 0; |
1052 | } | |
1053 | ||
1054 | ||
1da177e4 LT |
1055 | static void poll(void *send_info) |
1056 | { | |
1057 | struct smi_info *smi_info = send_info; | |
f60adf42 | 1058 | unsigned long flags = 0; |
7aefac26 | 1059 | bool run_to_completion = smi_info->run_to_completion; |
1da177e4 | 1060 | |
15c62e10 CM |
1061 | /* |
1062 | * Make sure there is some delay in the poll loop so we can | |
1063 | * drive time forward and timeout things. | |
1064 | */ | |
1065 | udelay(10); | |
f60adf42 CM |
1066 | if (!run_to_completion) |
1067 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
15c62e10 | 1068 | smi_event_handler(smi_info, 10); |
f60adf42 CM |
1069 | if (!run_to_completion) |
1070 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1da177e4 LT |
1071 | } |
1072 | ||
1073 | static void request_events(void *send_info) | |
1074 | { | |
1075 | struct smi_info *smi_info = send_info; | |
1076 | ||
b874b985 | 1077 | if (!smi_info->has_event_buffer) |
b361e27b CM |
1078 | return; |
1079 | ||
1da177e4 LT |
1080 | atomic_set(&smi_info->req_events, 1); |
1081 | } | |
1082 | ||
7aefac26 | 1083 | static void set_need_watch(void *send_info, bool enable) |
89986496 CM |
1084 | { |
1085 | struct smi_info *smi_info = send_info; | |
1086 | unsigned long flags; | |
1087 | ||
1088 | atomic_set(&smi_info->need_watch, enable); | |
1089 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
1090 | check_start_timer_thread(smi_info); | |
1091 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1092 | } | |
1093 | ||
e99e88a9 | 1094 | static void smi_timeout(struct timer_list *t) |
1da177e4 | 1095 | { |
e99e88a9 | 1096 | struct smi_info *smi_info = from_timer(smi_info, t, si_timer); |
1da177e4 LT |
1097 | enum si_sm_result smi_result; |
1098 | unsigned long flags; | |
1099 | unsigned long jiffies_now; | |
c4edff1c | 1100 | long time_diff; |
3326f4f2 | 1101 | long timeout; |
1da177e4 | 1102 | |
1da177e4 | 1103 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
f93aae9f JS |
1104 | debug_timestamp("Timer"); |
1105 | ||
1da177e4 | 1106 | jiffies_now = jiffies; |
c4edff1c | 1107 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
1108 | * SI_USEC_PER_JIFFY); |
1109 | smi_result = smi_event_handler(smi_info, time_diff); | |
1110 | ||
910840f2 | 1111 | if ((smi_info->io.irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 | 1112 | /* Running with interrupts, only do long timeouts. */ |
3326f4f2 | 1113 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
64959e2d | 1114 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1115 | goto do_mod_timer; |
1da177e4 LT |
1116 | } |
1117 | ||
c305e3d3 CM |
1118 | /* |
1119 | * If the state machine asks for a short delay, then shorten | |
1120 | * the timer timeout. | |
1121 | */ | |
1da177e4 | 1122 | if (smi_result == SI_SM_CALL_WITH_DELAY) { |
64959e2d | 1123 | smi_inc_stat(smi_info, short_timeouts); |
3326f4f2 | 1124 | timeout = jiffies + 1; |
1da177e4 | 1125 | } else { |
64959e2d | 1126 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1127 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1128 | } |
1129 | ||
76824852 | 1130 | do_mod_timer: |
3326f4f2 | 1131 | if (smi_result != SI_SM_IDLE) |
48e8ac29 BS |
1132 | smi_mod_timer(smi_info, timeout); |
1133 | else | |
1134 | smi_info->timer_running = false; | |
1135 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1da177e4 LT |
1136 | } |
1137 | ||
4f3e8199 | 1138 | irqreturn_t ipmi_si_irq_handler(int irq, void *data) |
1da177e4 LT |
1139 | { |
1140 | struct smi_info *smi_info = data; | |
1141 | unsigned long flags; | |
1da177e4 | 1142 | |
4f3e8199 CM |
1143 | if (smi_info->io.si_type == SI_BT) |
1144 | /* We need to clear the IRQ flag for the BT interface. */ | |
1145 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1146 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1147 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1148 | ||
1da177e4 LT |
1149 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
1150 | ||
64959e2d | 1151 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1152 | |
f93aae9f JS |
1153 | debug_timestamp("Interrupt"); |
1154 | ||
1da177e4 | 1155 | smi_event_handler(smi_info, 0); |
1da177e4 LT |
1156 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1157 | return IRQ_HANDLED; | |
1158 | } | |
1159 | ||
453823ba CM |
1160 | static int smi_start_processing(void *send_info, |
1161 | ipmi_smi_t intf) | |
1162 | { | |
1163 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1164 | int enable = 0; |
453823ba CM |
1165 | |
1166 | new_smi->intf = intf; | |
1167 | ||
1168 | /* Set up the timer that drives the interface. */ | |
e99e88a9 | 1169 | timer_setup(&new_smi->si_timer, smi_timeout, 0); |
48e8ac29 | 1170 | smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES); |
453823ba | 1171 | |
27f972d3 | 1172 | /* Try to claim any interrupts. */ |
4f3e8199 CM |
1173 | if (new_smi->io.irq_setup) { |
1174 | new_smi->io.irq_handler_data = new_smi; | |
1175 | new_smi->io.irq_setup(&new_smi->io); | |
1176 | } | |
27f972d3 | 1177 | |
a51f4a81 CM |
1178 | /* |
1179 | * Check if the user forcefully enabled the daemon. | |
1180 | */ | |
1181 | if (new_smi->intf_num < num_force_kipmid) | |
1182 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1183 | /* |
1184 | * The BT interface is efficient enough to not need a thread, | |
1185 | * and there is no need for a thread if we have interrupts. | |
1186 | */ | |
910840f2 | 1187 | else if ((new_smi->io.si_type != SI_BT) && (!new_smi->io.irq)) |
a51f4a81 CM |
1188 | enable = 1; |
1189 | ||
1190 | if (enable) { | |
453823ba CM |
1191 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1192 | "kipmi%d", new_smi->intf_num); | |
1193 | if (IS_ERR(new_smi->thread)) { | |
910840f2 | 1194 | dev_notice(new_smi->io.dev, "Could not start" |
279fbd0c MS |
1195 | " kernel thread due to error %ld, only using" |
1196 | " timers to drive the interface\n", | |
1197 | PTR_ERR(new_smi->thread)); | |
453823ba CM |
1198 | new_smi->thread = NULL; |
1199 | } | |
1200 | } | |
1201 | ||
1202 | return 0; | |
1203 | } | |
9dbf68f9 | 1204 | |
16f4232c ZY |
1205 | static int get_smi_info(void *send_info, struct ipmi_smi_info *data) |
1206 | { | |
1207 | struct smi_info *smi = send_info; | |
1208 | ||
910840f2 CM |
1209 | data->addr_src = smi->io.addr_source; |
1210 | data->dev = smi->io.dev; | |
bb398a4c | 1211 | data->addr_info = smi->io.addr_info; |
910840f2 | 1212 | get_device(smi->io.dev); |
16f4232c ZY |
1213 | |
1214 | return 0; | |
1215 | } | |
1216 | ||
7aefac26 | 1217 | static void set_maintenance_mode(void *send_info, bool enable) |
b9675136 CM |
1218 | { |
1219 | struct smi_info *smi_info = send_info; | |
1220 | ||
1221 | if (!enable) | |
1222 | atomic_set(&smi_info->req_events, 0); | |
1223 | } | |
1224 | ||
81d02b7f | 1225 | static const struct ipmi_smi_handlers handlers = { |
1da177e4 | 1226 | .owner = THIS_MODULE, |
453823ba | 1227 | .start_processing = smi_start_processing, |
16f4232c | 1228 | .get_smi_info = get_smi_info, |
1da177e4 LT |
1229 | .sender = sender, |
1230 | .request_events = request_events, | |
89986496 | 1231 | .set_need_watch = set_need_watch, |
b9675136 | 1232 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 | 1233 | .set_run_to_completion = set_run_to_completion, |
82802f96 | 1234 | .flush_messages = flush_messages, |
1da177e4 LT |
1235 | .poll = poll, |
1236 | }; | |
1237 | ||
b0defcdb | 1238 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1239 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1240 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1241 | |
99ee6735 | 1242 | static const char * const addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b | 1243 | |
a51f4a81 CM |
1244 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1245 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1246 | " disabled(0). Normally the IPMI driver auto-detects" | |
1247 | " this, but the value may be overridden by this parm."); | |
7aefac26 | 1248 | module_param(unload_when_empty, bool, 0); |
b361e27b CM |
1249 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" |
1250 | " specified or found, default is 1. Setting to 0" | |
1251 | " is useful for hot add of devices using hotmod."); | |
ae74e823 MW |
1252 | module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); |
1253 | MODULE_PARM_DESC(kipmid_max_busy_us, | |
1254 | "Max time (in microseconds) to busy-wait for IPMI data before" | |
1255 | " sleeping. 0 (default) means to wait forever. Set to 100-500" | |
1256 | " if kipmid is using up a lot of CPU time."); | |
1da177e4 | 1257 | |
4f3e8199 CM |
1258 | void ipmi_irq_finish_setup(struct si_sm_io *io) |
1259 | { | |
1260 | if (io->si_type == SI_BT) | |
1261 | /* Enable the interrupt in the BT interface. */ | |
1262 | io->outputb(io, IPMI_BT_INTMASK_REG, | |
1263 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1264 | } | |
1da177e4 | 1265 | |
4f3e8199 | 1266 | void ipmi_irq_start_cleanup(struct si_sm_io *io) |
1da177e4 | 1267 | { |
4f3e8199 | 1268 | if (io->si_type == SI_BT) |
b0defcdb | 1269 | /* Disable the interrupt in the BT interface. */ |
4f3e8199 CM |
1270 | io->outputb(io, IPMI_BT_INTMASK_REG, 0); |
1271 | } | |
1272 | ||
1273 | static void std_irq_cleanup(struct si_sm_io *io) | |
1274 | { | |
1275 | ipmi_irq_start_cleanup(io); | |
1276 | free_irq(io->irq, io->irq_handler_data); | |
1da177e4 | 1277 | } |
1da177e4 | 1278 | |
4f3e8199 | 1279 | int ipmi_std_irq_setup(struct si_sm_io *io) |
1da177e4 LT |
1280 | { |
1281 | int rv; | |
1282 | ||
4f3e8199 | 1283 | if (!io->irq) |
1da177e4 LT |
1284 | return 0; |
1285 | ||
4f3e8199 CM |
1286 | rv = request_irq(io->irq, |
1287 | ipmi_si_irq_handler, | |
1288 | IRQF_SHARED, | |
1289 | DEVICE_NAME, | |
1290 | io->irq_handler_data); | |
1da177e4 | 1291 | if (rv) { |
4f3e8199 | 1292 | dev_warn(io->dev, "%s unable to claim interrupt %d," |
279fbd0c | 1293 | " running polled\n", |
4f3e8199 CM |
1294 | DEVICE_NAME, io->irq); |
1295 | io->irq = 0; | |
1da177e4 | 1296 | } else { |
4f3e8199 CM |
1297 | io->irq_cleanup = std_irq_cleanup; |
1298 | ipmi_irq_finish_setup(io); | |
1299 | dev_info(io->dev, "Using irq %d\n", io->irq); | |
1da177e4 LT |
1300 | } |
1301 | ||
1302 | return rv; | |
1303 | } | |
1304 | ||
40112ae7 | 1305 | static int wait_for_msg_done(struct smi_info *smi_info) |
1da177e4 | 1306 | { |
50c812b2 | 1307 | enum si_sm_result smi_result; |
1da177e4 LT |
1308 | |
1309 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 1310 | for (;;) { |
c3e7e791 CM |
1311 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
1312 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 1313 | schedule_timeout_uninterruptible(1); |
1da177e4 | 1314 | smi_result = smi_info->handlers->event( |
e21404dc | 1315 | smi_info->si_sm, jiffies_to_usecs(1)); |
c305e3d3 | 1316 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
1317 | smi_result = smi_info->handlers->event( |
1318 | smi_info->si_sm, 0); | |
c305e3d3 | 1319 | } else |
1da177e4 LT |
1320 | break; |
1321 | } | |
40112ae7 | 1322 | if (smi_result == SI_SM_HOSED) |
c305e3d3 CM |
1323 | /* |
1324 | * We couldn't get the state machine to run, so whatever's at | |
1325 | * the port is probably not an IPMI SMI interface. | |
1326 | */ | |
40112ae7 CM |
1327 | return -ENODEV; |
1328 | ||
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | static int try_get_dev_id(struct smi_info *smi_info) | |
1333 | { | |
1334 | unsigned char msg[2]; | |
1335 | unsigned char *resp; | |
1336 | unsigned long resp_len; | |
1337 | int rv = 0; | |
1338 | ||
1339 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
1340 | if (!resp) | |
1341 | return -ENOMEM; | |
1342 | ||
1343 | /* | |
1344 | * Do a Get Device ID command, since it comes back with some | |
1345 | * useful info. | |
1346 | */ | |
1347 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
1348 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
1349 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
1350 | ||
1351 | rv = wait_for_msg_done(smi_info); | |
1352 | if (rv) | |
1da177e4 | 1353 | goto out; |
1da177e4 | 1354 | |
1da177e4 LT |
1355 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, |
1356 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 1357 | |
d8c98618 | 1358 | /* Check and record info from the get device id, in case we need it. */ |
c468f911 JK |
1359 | rv = ipmi_demangle_device_id(resp[0] >> 2, resp[1], |
1360 | resp + 2, resp_len - 2, &smi_info->device_id); | |
1da177e4 | 1361 | |
76824852 | 1362 | out: |
1da177e4 LT |
1363 | kfree(resp); |
1364 | return rv; | |
1365 | } | |
1366 | ||
d0882897 | 1367 | static int get_global_enables(struct smi_info *smi_info, u8 *enables) |
1e7d6a45 CM |
1368 | { |
1369 | unsigned char msg[3]; | |
1370 | unsigned char *resp; | |
1371 | unsigned long resp_len; | |
1372 | int rv; | |
1373 | ||
1374 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
d0882897 CM |
1375 | if (!resp) |
1376 | return -ENOMEM; | |
1e7d6a45 CM |
1377 | |
1378 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
1379 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
1380 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
1381 | ||
1382 | rv = wait_for_msg_done(smi_info); | |
1383 | if (rv) { | |
910840f2 | 1384 | dev_warn(smi_info->io.dev, |
d0882897 CM |
1385 | "Error getting response from get global enables command: %d\n", |
1386 | rv); | |
1e7d6a45 CM |
1387 | goto out; |
1388 | } | |
1389 | ||
1390 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
1391 | resp, IPMI_MAX_MSG_LENGTH); | |
1392 | ||
1393 | if (resp_len < 4 || | |
1394 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
1395 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
1396 | resp[2] != 0) { | |
910840f2 | 1397 | dev_warn(smi_info->io.dev, |
d0882897 CM |
1398 | "Invalid return from get global enables command: %ld %x %x %x\n", |
1399 | resp_len, resp[0], resp[1], resp[2]); | |
1e7d6a45 CM |
1400 | rv = -EINVAL; |
1401 | goto out; | |
d0882897 CM |
1402 | } else { |
1403 | *enables = resp[3]; | |
1e7d6a45 CM |
1404 | } |
1405 | ||
d0882897 CM |
1406 | out: |
1407 | kfree(resp); | |
1408 | return rv; | |
1409 | } | |
1410 | ||
1411 | /* | |
1412 | * Returns 1 if it gets an error from the command. | |
1413 | */ | |
1414 | static int set_global_enables(struct smi_info *smi_info, u8 enables) | |
1415 | { | |
1416 | unsigned char msg[3]; | |
1417 | unsigned char *resp; | |
1418 | unsigned long resp_len; | |
1419 | int rv; | |
1420 | ||
1421 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
1422 | if (!resp) | |
1423 | return -ENOMEM; | |
1e7d6a45 CM |
1424 | |
1425 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
1426 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
d0882897 | 1427 | msg[2] = enables; |
1e7d6a45 CM |
1428 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); |
1429 | ||
1430 | rv = wait_for_msg_done(smi_info); | |
1431 | if (rv) { | |
910840f2 | 1432 | dev_warn(smi_info->io.dev, |
d0882897 CM |
1433 | "Error getting response from set global enables command: %d\n", |
1434 | rv); | |
1e7d6a45 CM |
1435 | goto out; |
1436 | } | |
1437 | ||
1438 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
1439 | resp, IPMI_MAX_MSG_LENGTH); | |
1440 | ||
1441 | if (resp_len < 3 || | |
1442 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
1443 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
910840f2 | 1444 | dev_warn(smi_info->io.dev, |
d0882897 CM |
1445 | "Invalid return from set global enables command: %ld %x %x\n", |
1446 | resp_len, resp[0], resp[1]); | |
1e7d6a45 CM |
1447 | rv = -EINVAL; |
1448 | goto out; | |
1449 | } | |
1450 | ||
d0882897 CM |
1451 | if (resp[2] != 0) |
1452 | rv = 1; | |
1453 | ||
1454 | out: | |
1455 | kfree(resp); | |
1456 | return rv; | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * Some BMCs do not support clearing the receive irq bit in the global | |
1461 | * enables (even if they don't support interrupts on the BMC). Check | |
1462 | * for this and handle it properly. | |
1463 | */ | |
1464 | static void check_clr_rcv_irq(struct smi_info *smi_info) | |
1465 | { | |
1466 | u8 enables = 0; | |
1467 | int rv; | |
1468 | ||
1469 | rv = get_global_enables(smi_info, &enables); | |
1470 | if (!rv) { | |
1471 | if ((enables & IPMI_BMC_RCV_MSG_INTR) == 0) | |
1472 | /* Already clear, should work ok. */ | |
1473 | return; | |
1474 | ||
1475 | enables &= ~IPMI_BMC_RCV_MSG_INTR; | |
1476 | rv = set_global_enables(smi_info, enables); | |
1477 | } | |
1478 | ||
1479 | if (rv < 0) { | |
910840f2 | 1480 | dev_err(smi_info->io.dev, |
d0882897 CM |
1481 | "Cannot check clearing the rcv irq: %d\n", rv); |
1482 | return; | |
1483 | } | |
1484 | ||
1485 | if (rv) { | |
1e7d6a45 CM |
1486 | /* |
1487 | * An error when setting the event buffer bit means | |
1488 | * clearing the bit is not supported. | |
1489 | */ | |
910840f2 | 1490 | dev_warn(smi_info->io.dev, |
d0882897 CM |
1491 | "The BMC does not support clearing the recv irq bit, compensating, but the BMC needs to be fixed.\n"); |
1492 | smi_info->cannot_disable_irq = true; | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | /* | |
1497 | * Some BMCs do not support setting the interrupt bits in the global | |
1498 | * enables even if they support interrupts. Clearly bad, but we can | |
1499 | * compensate. | |
1500 | */ | |
1501 | static void check_set_rcv_irq(struct smi_info *smi_info) | |
1502 | { | |
1503 | u8 enables = 0; | |
1504 | int rv; | |
1505 | ||
910840f2 | 1506 | if (!smi_info->io.irq) |
d0882897 CM |
1507 | return; |
1508 | ||
1509 | rv = get_global_enables(smi_info, &enables); | |
1510 | if (!rv) { | |
1511 | enables |= IPMI_BMC_RCV_MSG_INTR; | |
1512 | rv = set_global_enables(smi_info, enables); | |
1513 | } | |
1514 | ||
1515 | if (rv < 0) { | |
910840f2 | 1516 | dev_err(smi_info->io.dev, |
d0882897 CM |
1517 | "Cannot check setting the rcv irq: %d\n", rv); |
1518 | return; | |
1519 | } | |
1520 | ||
1521 | if (rv) { | |
1522 | /* | |
1523 | * An error when setting the event buffer bit means | |
1524 | * setting the bit is not supported. | |
1525 | */ | |
910840f2 | 1526 | dev_warn(smi_info->io.dev, |
d0882897 CM |
1527 | "The BMC does not support setting the recv irq bit, compensating, but the BMC needs to be fixed.\n"); |
1528 | smi_info->cannot_disable_irq = true; | |
1529 | smi_info->irq_enable_broken = true; | |
1e7d6a45 | 1530 | } |
1e7d6a45 CM |
1531 | } |
1532 | ||
40112ae7 CM |
1533 | static int try_enable_event_buffer(struct smi_info *smi_info) |
1534 | { | |
1535 | unsigned char msg[3]; | |
1536 | unsigned char *resp; | |
1537 | unsigned long resp_len; | |
1538 | int rv = 0; | |
1539 | ||
1540 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
1541 | if (!resp) | |
1542 | return -ENOMEM; | |
1543 | ||
1544 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
1545 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
1546 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
1547 | ||
1548 | rv = wait_for_msg_done(smi_info); | |
1549 | if (rv) { | |
bb2a08c0 | 1550 | pr_warn(PFX "Error getting response from get global enables command, the event buffer is not enabled.\n"); |
40112ae7 CM |
1551 | goto out; |
1552 | } | |
1553 | ||
1554 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
1555 | resp, IPMI_MAX_MSG_LENGTH); | |
1556 | ||
1557 | if (resp_len < 4 || | |
1558 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
1559 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
1560 | resp[2] != 0) { | |
bb2a08c0 | 1561 | pr_warn(PFX "Invalid return from get global enables command, cannot enable the event buffer.\n"); |
40112ae7 CM |
1562 | rv = -EINVAL; |
1563 | goto out; | |
1564 | } | |
1565 | ||
d9b7e4f7 | 1566 | if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) { |
40112ae7 | 1567 | /* buffer is already enabled, nothing to do. */ |
d9b7e4f7 | 1568 | smi_info->supports_event_msg_buff = true; |
40112ae7 | 1569 | goto out; |
d9b7e4f7 | 1570 | } |
40112ae7 CM |
1571 | |
1572 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
1573 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
1574 | msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; | |
1575 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
1576 | ||
1577 | rv = wait_for_msg_done(smi_info); | |
1578 | if (rv) { | |
bb2a08c0 | 1579 | pr_warn(PFX "Error getting response from set global, enables command, the event buffer is not enabled.\n"); |
40112ae7 CM |
1580 | goto out; |
1581 | } | |
1582 | ||
1583 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
1584 | resp, IPMI_MAX_MSG_LENGTH); | |
1585 | ||
1586 | if (resp_len < 3 || | |
1587 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
1588 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
bb2a08c0 | 1589 | pr_warn(PFX "Invalid return from get global, enables command, not enable the event buffer.\n"); |
40112ae7 CM |
1590 | rv = -EINVAL; |
1591 | goto out; | |
1592 | } | |
1593 | ||
1594 | if (resp[2] != 0) | |
1595 | /* | |
1596 | * An error when setting the event buffer bit means | |
1597 | * that the event buffer is not supported. | |
1598 | */ | |
1599 | rv = -ENOENT; | |
d9b7e4f7 CM |
1600 | else |
1601 | smi_info->supports_event_msg_buff = true; | |
1602 | ||
76824852 | 1603 | out: |
40112ae7 CM |
1604 | kfree(resp); |
1605 | return rv; | |
1606 | } | |
1607 | ||
55f91cb6 | 1608 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
07412736 | 1609 | static int smi_type_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1610 | { |
07412736 | 1611 | struct smi_info *smi = m->private; |
1da177e4 | 1612 | |
910840f2 | 1613 | seq_printf(m, "%s\n", si_to_str[smi->io.si_type]); |
d6c5dc18 | 1614 | |
5e33cd0c | 1615 | return 0; |
1da177e4 LT |
1616 | } |
1617 | ||
07412736 | 1618 | static int smi_type_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 1619 | { |
d9dda78b | 1620 | return single_open(file, smi_type_proc_show, PDE_DATA(inode)); |
07412736 AD |
1621 | } |
1622 | ||
1623 | static const struct file_operations smi_type_proc_ops = { | |
1624 | .open = smi_type_proc_open, | |
1625 | .read = seq_read, | |
1626 | .llseek = seq_lseek, | |
1627 | .release = single_release, | |
1628 | }; | |
1629 | ||
1630 | static int smi_si_stats_proc_show(struct seq_file *m, void *v) | |
1631 | { | |
1632 | struct smi_info *smi = m->private; | |
1da177e4 | 1633 | |
07412736 | 1634 | seq_printf(m, "interrupts_enabled: %d\n", |
910840f2 | 1635 | smi->io.irq && !smi->interrupt_disabled); |
07412736 | 1636 | seq_printf(m, "short_timeouts: %u\n", |
64959e2d | 1637 | smi_get_stat(smi, short_timeouts)); |
07412736 | 1638 | seq_printf(m, "long_timeouts: %u\n", |
64959e2d | 1639 | smi_get_stat(smi, long_timeouts)); |
07412736 | 1640 | seq_printf(m, "idles: %u\n", |
64959e2d | 1641 | smi_get_stat(smi, idles)); |
07412736 | 1642 | seq_printf(m, "interrupts: %u\n", |
64959e2d | 1643 | smi_get_stat(smi, interrupts)); |
07412736 | 1644 | seq_printf(m, "attentions: %u\n", |
64959e2d | 1645 | smi_get_stat(smi, attentions)); |
07412736 | 1646 | seq_printf(m, "flag_fetches: %u\n", |
64959e2d | 1647 | smi_get_stat(smi, flag_fetches)); |
07412736 | 1648 | seq_printf(m, "hosed_count: %u\n", |
64959e2d | 1649 | smi_get_stat(smi, hosed_count)); |
07412736 | 1650 | seq_printf(m, "complete_transactions: %u\n", |
64959e2d | 1651 | smi_get_stat(smi, complete_transactions)); |
07412736 | 1652 | seq_printf(m, "events: %u\n", |
64959e2d | 1653 | smi_get_stat(smi, events)); |
07412736 | 1654 | seq_printf(m, "watchdog_pretimeouts: %u\n", |
64959e2d | 1655 | smi_get_stat(smi, watchdog_pretimeouts)); |
07412736 | 1656 | seq_printf(m, "incoming_messages: %u\n", |
64959e2d | 1657 | smi_get_stat(smi, incoming_messages)); |
07412736 AD |
1658 | return 0; |
1659 | } | |
1da177e4 | 1660 | |
07412736 AD |
1661 | static int smi_si_stats_proc_open(struct inode *inode, struct file *file) |
1662 | { | |
d9dda78b | 1663 | return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode)); |
b361e27b CM |
1664 | } |
1665 | ||
07412736 AD |
1666 | static const struct file_operations smi_si_stats_proc_ops = { |
1667 | .open = smi_si_stats_proc_open, | |
1668 | .read = seq_read, | |
1669 | .llseek = seq_lseek, | |
1670 | .release = single_release, | |
1671 | }; | |
1672 | ||
1673 | static int smi_params_proc_show(struct seq_file *m, void *v) | |
b361e27b | 1674 | { |
07412736 | 1675 | struct smi_info *smi = m->private; |
b361e27b | 1676 | |
d6c5dc18 JP |
1677 | seq_printf(m, |
1678 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", | |
910840f2 | 1679 | si_to_str[smi->io.si_type], |
d6c5dc18 JP |
1680 | addr_space_to_str[smi->io.addr_type], |
1681 | smi->io.addr_data, | |
1682 | smi->io.regspacing, | |
1683 | smi->io.regsize, | |
1684 | smi->io.regshift, | |
910840f2 CM |
1685 | smi->io.irq, |
1686 | smi->io.slave_addr); | |
d6c5dc18 | 1687 | |
5e33cd0c | 1688 | return 0; |
1da177e4 LT |
1689 | } |
1690 | ||
07412736 AD |
1691 | static int smi_params_proc_open(struct inode *inode, struct file *file) |
1692 | { | |
d9dda78b | 1693 | return single_open(file, smi_params_proc_show, PDE_DATA(inode)); |
07412736 AD |
1694 | } |
1695 | ||
1696 | static const struct file_operations smi_params_proc_ops = { | |
1697 | .open = smi_params_proc_open, | |
1698 | .read = seq_read, | |
1699 | .llseek = seq_lseek, | |
1700 | .release = single_release, | |
1701 | }; | |
55f91cb6 | 1702 | #endif |
07412736 | 1703 | |
3dd377b5 CM |
1704 | #define IPMI_SI_ATTR(name) \ |
1705 | static ssize_t ipmi_##name##_show(struct device *dev, \ | |
1706 | struct device_attribute *attr, \ | |
1707 | char *buf) \ | |
1708 | { \ | |
1709 | struct smi_info *smi_info = dev_get_drvdata(dev); \ | |
1710 | \ | |
1711 | return snprintf(buf, 10, "%u\n", smi_get_stat(smi_info, name)); \ | |
1712 | } \ | |
1713 | static DEVICE_ATTR(name, S_IRUGO, ipmi_##name##_show, NULL) | |
1714 | ||
1715 | static ssize_t ipmi_type_show(struct device *dev, | |
1716 | struct device_attribute *attr, | |
1717 | char *buf) | |
1718 | { | |
1719 | struct smi_info *smi_info = dev_get_drvdata(dev); | |
1720 | ||
1721 | return snprintf(buf, 10, "%s\n", si_to_str[smi_info->io.si_type]); | |
1722 | } | |
1723 | static DEVICE_ATTR(type, S_IRUGO, ipmi_type_show, NULL); | |
1724 | ||
1725 | static ssize_t ipmi_interrupts_enabled_show(struct device *dev, | |
1726 | struct device_attribute *attr, | |
1727 | char *buf) | |
1728 | { | |
1729 | struct smi_info *smi_info = dev_get_drvdata(dev); | |
1730 | int enabled = smi_info->io.irq && !smi_info->interrupt_disabled; | |
1731 | ||
1732 | return snprintf(buf, 10, "%d\n", enabled); | |
1733 | } | |
1734 | static DEVICE_ATTR(interrupts_enabled, S_IRUGO, | |
1735 | ipmi_interrupts_enabled_show, NULL); | |
1736 | ||
1737 | IPMI_SI_ATTR(short_timeouts); | |
1738 | IPMI_SI_ATTR(long_timeouts); | |
1739 | IPMI_SI_ATTR(idles); | |
1740 | IPMI_SI_ATTR(interrupts); | |
1741 | IPMI_SI_ATTR(attentions); | |
1742 | IPMI_SI_ATTR(flag_fetches); | |
1743 | IPMI_SI_ATTR(hosed_count); | |
1744 | IPMI_SI_ATTR(complete_transactions); | |
1745 | IPMI_SI_ATTR(events); | |
1746 | IPMI_SI_ATTR(watchdog_pretimeouts); | |
1747 | IPMI_SI_ATTR(incoming_messages); | |
1748 | ||
1749 | static ssize_t ipmi_params_show(struct device *dev, | |
1750 | struct device_attribute *attr, | |
1751 | char *buf) | |
1752 | { | |
1753 | struct smi_info *smi_info = dev_get_drvdata(dev); | |
1754 | ||
1755 | return snprintf(buf, 200, | |
1756 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", | |
1757 | si_to_str[smi_info->io.si_type], | |
1758 | addr_space_to_str[smi_info->io.addr_type], | |
1759 | smi_info->io.addr_data, | |
1760 | smi_info->io.regspacing, | |
1761 | smi_info->io.regsize, | |
1762 | smi_info->io.regshift, | |
1763 | smi_info->io.irq, | |
1764 | smi_info->io.slave_addr); | |
1765 | } | |
1766 | static DEVICE_ATTR(params, S_IRUGO, ipmi_params_show, NULL); | |
1767 | ||
1768 | static struct attribute *ipmi_si_dev_attrs[] = { | |
1769 | &dev_attr_type.attr, | |
1770 | &dev_attr_interrupts_enabled.attr, | |
1771 | &dev_attr_short_timeouts.attr, | |
1772 | &dev_attr_long_timeouts.attr, | |
1773 | &dev_attr_idles.attr, | |
1774 | &dev_attr_interrupts.attr, | |
1775 | &dev_attr_attentions.attr, | |
1776 | &dev_attr_flag_fetches.attr, | |
1777 | &dev_attr_hosed_count.attr, | |
1778 | &dev_attr_complete_transactions.attr, | |
1779 | &dev_attr_events.attr, | |
1780 | &dev_attr_watchdog_pretimeouts.attr, | |
1781 | &dev_attr_incoming_messages.attr, | |
1782 | &dev_attr_params.attr, | |
1783 | NULL | |
1784 | }; | |
1785 | ||
1786 | static const struct attribute_group ipmi_si_dev_attr_group = { | |
1787 | .attrs = ipmi_si_dev_attrs, | |
1788 | }; | |
1789 | ||
3ae0e0f9 CM |
1790 | /* |
1791 | * oem_data_avail_to_receive_msg_avail | |
1792 | * @info - smi_info structure with msg_flags set | |
1793 | * | |
1794 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
1795 | * Returns 1 indicating need to re-run handle_flags(). | |
1796 | */ | |
1797 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
1798 | { | |
e8b33617 | 1799 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 1800 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
1801 | return 1; |
1802 | } | |
1803 | ||
1804 | /* | |
1805 | * setup_dell_poweredge_oem_data_handler | |
1806 | * @info - smi_info.device_id must be populated | |
1807 | * | |
1808 | * Systems that match, but have firmware version < 1.40 may assert | |
1809 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
1810 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
1811 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
1812 | * as RECEIVE_MSG_AVAIL instead. | |
1813 | * | |
1814 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
1815 | * assert the OEM[012] bits, and if it did, the driver would have to | |
1816 | * change to handle that properly, we don't actually check for the | |
1817 | * firmware version. | |
1818 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
1819 | * Device Revision = 0x80 | |
1820 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
1821 | * Firmware Revision2 = 0x40 BCD encoded | |
1822 | * IPMI Version = 0x51 IPMI 1.5 | |
1823 | * Manufacturer ID = A2 02 00 Dell IANA | |
1824 | * | |
d5a2b89a CM |
1825 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
1826 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
1827 | * | |
3ae0e0f9 CM |
1828 | */ |
1829 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
1830 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
1831 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 1832 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
1833 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
1834 | { | |
1835 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 1836 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
1837 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
1838 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 1839 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
1840 | smi_info->oem_data_avail_handler = |
1841 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
1842 | } else if (ipmi_version_major(id) < 1 || |
1843 | (ipmi_version_major(id) == 1 && | |
1844 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
1845 | smi_info->oem_data_avail_handler = |
1846 | oem_data_avail_to_receive_msg_avail; | |
1847 | } | |
3ae0e0f9 CM |
1848 | } |
1849 | } | |
1850 | ||
ea94027b CM |
1851 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
1852 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
1853 | { | |
1854 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
1855 | ||
25985edc | 1856 | /* Make it a response */ |
ea94027b CM |
1857 | msg->rsp[0] = msg->data[0] | 4; |
1858 | msg->rsp[1] = msg->data[1]; | |
1859 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
1860 | msg->rsp_size = 3; | |
1861 | smi_info->curr_msg = NULL; | |
1862 | deliver_recv_msg(smi_info, msg); | |
1863 | } | |
1864 | ||
1865 | /* | |
1866 | * dell_poweredge_bt_xaction_handler | |
1867 | * @info - smi_info.device_id must be populated | |
1868 | * | |
1869 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
1870 | * not respond to a Get SDR command if the length of the data | |
1871 | * requested is exactly 0x3A, which leads to command timeouts and no | |
1872 | * data returned. This intercepts such commands, and causes userspace | |
1873 | * callers to try again with a different-sized buffer, which succeeds. | |
1874 | */ | |
1875 | ||
1876 | #define STORAGE_NETFN 0x0A | |
1877 | #define STORAGE_CMD_GET_SDR 0x23 | |
1878 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
1879 | unsigned long unused, | |
1880 | void *in) | |
1881 | { | |
1882 | struct smi_info *smi_info = in; | |
1883 | unsigned char *data = smi_info->curr_msg->data; | |
1884 | unsigned int size = smi_info->curr_msg->data_size; | |
1885 | if (size >= 8 && | |
1886 | (data[0]>>2) == STORAGE_NETFN && | |
1887 | data[1] == STORAGE_CMD_GET_SDR && | |
1888 | data[7] == 0x3A) { | |
1889 | return_hosed_msg_badsize(smi_info); | |
1890 | return NOTIFY_STOP; | |
1891 | } | |
1892 | return NOTIFY_DONE; | |
1893 | } | |
1894 | ||
1895 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
1896 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
1897 | }; | |
1898 | ||
1899 | /* | |
1900 | * setup_dell_poweredge_bt_xaction_handler | |
1901 | * @info - smi_info.device_id must be filled in already | |
1902 | * | |
1903 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
1904 | * when we know what function to use there. | |
1905 | */ | |
1906 | static void | |
1907 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
1908 | { | |
1909 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 1910 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
910840f2 | 1911 | smi_info->io.si_type == SI_BT) |
ea94027b CM |
1912 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); |
1913 | } | |
1914 | ||
3ae0e0f9 CM |
1915 | /* |
1916 | * setup_oem_data_handler | |
1917 | * @info - smi_info.device_id must be filled in already | |
1918 | * | |
1919 | * Fills in smi_info.device_id.oem_data_available_handler | |
1920 | * when we know what function to use there. | |
1921 | */ | |
1922 | ||
1923 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
1924 | { | |
1925 | setup_dell_poweredge_oem_data_handler(smi_info); | |
1926 | } | |
1927 | ||
ea94027b CM |
1928 | static void setup_xaction_handlers(struct smi_info *smi_info) |
1929 | { | |
1930 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
1931 | } | |
1932 | ||
d0882897 CM |
1933 | static void check_for_broken_irqs(struct smi_info *smi_info) |
1934 | { | |
1935 | check_clr_rcv_irq(smi_info); | |
1936 | check_set_rcv_irq(smi_info); | |
1937 | } | |
1938 | ||
a9a2c44f CM |
1939 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
1940 | { | |
b874b985 CM |
1941 | if (smi_info->thread != NULL) |
1942 | kthread_stop(smi_info->thread); | |
1943 | if (smi_info->timer_running) | |
453823ba | 1944 | del_timer_sync(&smi_info->si_timer); |
a9a2c44f CM |
1945 | } |
1946 | ||
7e030d6d | 1947 | static struct smi_info *find_dup_si(struct smi_info *info) |
1da177e4 | 1948 | { |
b0defcdb | 1949 | struct smi_info *e; |
1da177e4 | 1950 | |
b0defcdb CM |
1951 | list_for_each_entry(e, &smi_infos, link) { |
1952 | if (e->io.addr_type != info->io.addr_type) | |
1953 | continue; | |
94671710 CM |
1954 | if (e->io.addr_data == info->io.addr_data) { |
1955 | /* | |
1956 | * This is a cheap hack, ACPI doesn't have a defined | |
1957 | * slave address but SMBIOS does. Pick it up from | |
1958 | * any source that has it available. | |
1959 | */ | |
910840f2 CM |
1960 | if (info->io.slave_addr && !e->io.slave_addr) |
1961 | e->io.slave_addr = info->io.slave_addr; | |
7e030d6d | 1962 | return e; |
94671710 | 1963 | } |
b0defcdb | 1964 | } |
1da177e4 | 1965 | |
7e030d6d | 1966 | return NULL; |
b0defcdb | 1967 | } |
1da177e4 | 1968 | |
bb398a4c | 1969 | int ipmi_si_add_smi(struct si_sm_io *io) |
b0defcdb | 1970 | { |
2407d77a | 1971 | int rv = 0; |
bb398a4c | 1972 | struct smi_info *new_smi, *dup; |
b0defcdb | 1973 | |
bb398a4c CM |
1974 | if (!io->io_setup) { |
1975 | if (io->addr_type == IPMI_IO_ADDR_SPACE) { | |
58e27635 | 1976 | io->io_setup = ipmi_si_port_setup; |
bb398a4c | 1977 | } else if (io->addr_type == IPMI_MEM_ADDR_SPACE) { |
58e27635 | 1978 | io->io_setup = ipmi_si_mem_setup; |
e1eeb7f8 CM |
1979 | } else { |
1980 | return -EINVAL; | |
1981 | } | |
1982 | } | |
1983 | ||
67f4fb02 | 1984 | new_smi = kzalloc(sizeof(*new_smi), GFP_KERNEL); |
bb398a4c CM |
1985 | if (!new_smi) |
1986 | return -ENOMEM; | |
67f4fb02 | 1987 | spin_lock_init(&new_smi->si_lock); |
bb398a4c CM |
1988 | |
1989 | new_smi->io = *io; | |
1990 | ||
d6dfd131 | 1991 | mutex_lock(&smi_infos_lock); |
7e030d6d CM |
1992 | dup = find_dup_si(new_smi); |
1993 | if (dup) { | |
910840f2 CM |
1994 | if (new_smi->io.addr_source == SI_ACPI && |
1995 | dup->io.addr_source == SI_SMBIOS) { | |
7e030d6d | 1996 | /* We prefer ACPI over SMBIOS. */ |
910840f2 | 1997 | dev_info(dup->io.dev, |
7e030d6d | 1998 | "Removing SMBIOS-specified %s state machine in favor of ACPI\n", |
910840f2 | 1999 | si_to_str[new_smi->io.si_type]); |
7e030d6d CM |
2000 | cleanup_one_si(dup); |
2001 | } else { | |
910840f2 | 2002 | dev_info(new_smi->io.dev, |
7e030d6d | 2003 | "%s-specified %s state machine: duplicate\n", |
910840f2 CM |
2004 | ipmi_addr_src_to_str(new_smi->io.addr_source), |
2005 | si_to_str[new_smi->io.si_type]); | |
7e030d6d | 2006 | rv = -EBUSY; |
c0a32fe1 | 2007 | kfree(new_smi); |
7e030d6d CM |
2008 | goto out_err; |
2009 | } | |
b0defcdb | 2010 | } |
1da177e4 | 2011 | |
bb2a08c0 | 2012 | pr_info(PFX "Adding %s-specified %s state machine\n", |
910840f2 CM |
2013 | ipmi_addr_src_to_str(new_smi->io.addr_source), |
2014 | si_to_str[new_smi->io.si_type]); | |
2407d77a | 2015 | |
1da177e4 LT |
2016 | /* So we know not to free it unless we have allocated one. */ |
2017 | new_smi->intf = NULL; | |
2018 | new_smi->si_sm = NULL; | |
2019 | new_smi->handlers = NULL; | |
2020 | ||
2407d77a MG |
2021 | list_add_tail(&new_smi->link, &smi_infos); |
2022 | ||
bb398a4c CM |
2023 | if (initialized) { |
2024 | rv = try_smi_init(new_smi); | |
2025 | if (rv) { | |
2026 | mutex_unlock(&smi_infos_lock); | |
2027 | cleanup_one_si(new_smi); | |
2028 | return rv; | |
2029 | } | |
2030 | } | |
2407d77a MG |
2031 | out_err: |
2032 | mutex_unlock(&smi_infos_lock); | |
2033 | return rv; | |
2034 | } | |
2035 | ||
3f724c40 TC |
2036 | /* |
2037 | * Try to start up an interface. Must be called with smi_infos_lock | |
2038 | * held, primarily to keep smi_num consistent, we only one to do these | |
2039 | * one at a time. | |
2040 | */ | |
2407d77a MG |
2041 | static int try_smi_init(struct smi_info *new_smi) |
2042 | { | |
2043 | int rv = 0; | |
2044 | int i; | |
1abf71ee | 2045 | char *init_name = NULL; |
2407d77a | 2046 | |
bb2a08c0 | 2047 | pr_info(PFX "Trying %s-specified %s state machine at %s address 0x%lx, slave address 0x%x, irq %d\n", |
910840f2 CM |
2048 | ipmi_addr_src_to_str(new_smi->io.addr_source), |
2049 | si_to_str[new_smi->io.si_type], | |
bb2a08c0 CM |
2050 | addr_space_to_str[new_smi->io.addr_type], |
2051 | new_smi->io.addr_data, | |
910840f2 | 2052 | new_smi->io.slave_addr, new_smi->io.irq); |
2407d77a | 2053 | |
910840f2 | 2054 | switch (new_smi->io.si_type) { |
b0defcdb | 2055 | case SI_KCS: |
1da177e4 | 2056 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
2057 | break; |
2058 | ||
2059 | case SI_SMIC: | |
1da177e4 | 2060 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
2061 | break; |
2062 | ||
2063 | case SI_BT: | |
1da177e4 | 2064 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
2065 | break; |
2066 | ||
2067 | default: | |
1da177e4 LT |
2068 | /* No support for anything else yet. */ |
2069 | rv = -EIO; | |
2070 | goto out_err; | |
2071 | } | |
2072 | ||
3f724c40 TC |
2073 | new_smi->intf_num = smi_num; |
2074 | ||
1abf71ee | 2075 | /* Do this early so it's available for logs. */ |
910840f2 | 2076 | if (!new_smi->io.dev) { |
3f724c40 TC |
2077 | init_name = kasprintf(GFP_KERNEL, "ipmi_si.%d", |
2078 | new_smi->intf_num); | |
1abf71ee CM |
2079 | |
2080 | /* | |
2081 | * If we don't already have a device from something | |
2082 | * else (like PCI), then register a new one. | |
2083 | */ | |
2084 | new_smi->pdev = platform_device_alloc("ipmi_si", | |
2085 | new_smi->intf_num); | |
2086 | if (!new_smi->pdev) { | |
2087 | pr_err(PFX "Unable to allocate platform device\n"); | |
2088 | goto out_err; | |
2089 | } | |
910840f2 | 2090 | new_smi->io.dev = &new_smi->pdev->dev; |
9d70029e | 2091 | new_smi->io.dev->driver = &ipmi_platform_driver.driver; |
1abf71ee | 2092 | /* Nulled by device_add() */ |
910840f2 | 2093 | new_smi->io.dev->init_name = init_name; |
1abf71ee CM |
2094 | } |
2095 | ||
1da177e4 LT |
2096 | /* Allocate the state machine's data and initialize it. */ |
2097 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 2098 | if (!new_smi->si_sm) { |
1da177e4 LT |
2099 | rv = -ENOMEM; |
2100 | goto out_err; | |
2101 | } | |
e1eeb7f8 CM |
2102 | new_smi->io.io_size = new_smi->handlers->init_data(new_smi->si_sm, |
2103 | &new_smi->io); | |
1da177e4 LT |
2104 | |
2105 | /* Now that we know the I/O size, we can set up the I/O. */ | |
e1eeb7f8 | 2106 | rv = new_smi->io.io_setup(&new_smi->io); |
1da177e4 | 2107 | if (rv) { |
910840f2 | 2108 | dev_err(new_smi->io.dev, "Could not set up I/O space\n"); |
1da177e4 LT |
2109 | goto out_err; |
2110 | } | |
2111 | ||
1da177e4 LT |
2112 | /* Do low-level detection first. */ |
2113 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
910840f2 CM |
2114 | if (new_smi->io.addr_source) |
2115 | dev_err(new_smi->io.dev, | |
2116 | "Interface detection failed\n"); | |
1da177e4 LT |
2117 | rv = -ENODEV; |
2118 | goto out_err; | |
2119 | } | |
2120 | ||
c305e3d3 CM |
2121 | /* |
2122 | * Attempt a get device id command. If it fails, we probably | |
2123 | * don't have a BMC here. | |
2124 | */ | |
1da177e4 | 2125 | rv = try_get_dev_id(new_smi); |
b0defcdb | 2126 | if (rv) { |
910840f2 CM |
2127 | if (new_smi->io.addr_source) |
2128 | dev_err(new_smi->io.dev, | |
2129 | "There appears to be no BMC at this location\n"); | |
1da177e4 | 2130 | goto out_err; |
b0defcdb | 2131 | } |
1da177e4 | 2132 | |
3ae0e0f9 | 2133 | setup_oem_data_handler(new_smi); |
ea94027b | 2134 | setup_xaction_handlers(new_smi); |
d0882897 | 2135 | check_for_broken_irqs(new_smi); |
3ae0e0f9 | 2136 | |
b874b985 | 2137 | new_smi->waiting_msg = NULL; |
1da177e4 LT |
2138 | new_smi->curr_msg = NULL; |
2139 | atomic_set(&new_smi->req_events, 0); | |
7aefac26 | 2140 | new_smi->run_to_completion = false; |
64959e2d CM |
2141 | for (i = 0; i < SI_NUM_STATS; i++) |
2142 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 | 2143 | |
7aefac26 | 2144 | new_smi->interrupt_disabled = true; |
89986496 | 2145 | atomic_set(&new_smi->need_watch, 0); |
1da177e4 | 2146 | |
40112ae7 CM |
2147 | rv = try_enable_event_buffer(new_smi); |
2148 | if (rv == 0) | |
7aefac26 | 2149 | new_smi->has_event_buffer = true; |
40112ae7 | 2150 | |
c305e3d3 CM |
2151 | /* |
2152 | * Start clearing the flags before we enable interrupts or the | |
2153 | * timer to avoid racing with the timer. | |
2154 | */ | |
0cfec916 | 2155 | start_clear_flags(new_smi, false); |
d9b7e4f7 CM |
2156 | |
2157 | /* | |
2158 | * IRQ is defined to be set when non-zero. req_events will | |
2159 | * cause a global flags check that will enable interrupts. | |
2160 | */ | |
910840f2 | 2161 | if (new_smi->io.irq) { |
d9b7e4f7 CM |
2162 | new_smi->interrupt_disabled = false; |
2163 | atomic_set(&new_smi->req_events, 1); | |
2164 | } | |
1da177e4 | 2165 | |
1abf71ee | 2166 | if (new_smi->pdev) { |
b48f5457 | 2167 | rv = platform_device_add(new_smi->pdev); |
50c812b2 | 2168 | if (rv) { |
910840f2 | 2169 | dev_err(new_smi->io.dev, |
bb2a08c0 CM |
2170 | "Unable to register system interface device: %d\n", |
2171 | rv); | |
453823ba | 2172 | goto out_err; |
50c812b2 | 2173 | } |
50c812b2 CM |
2174 | } |
2175 | ||
3dd377b5 CM |
2176 | dev_set_drvdata(new_smi->io.dev, new_smi); |
2177 | rv = device_add_group(new_smi->io.dev, &ipmi_si_dev_attr_group); | |
2178 | if (rv) { | |
2179 | dev_err(new_smi->io.dev, | |
2180 | "Unable to add device attributes: error %d\n", | |
2181 | rv); | |
2182 | goto out_err_stop_timer; | |
2183 | } | |
2184 | ||
1da177e4 LT |
2185 | rv = ipmi_register_smi(&handlers, |
2186 | new_smi, | |
910840f2 CM |
2187 | new_smi->io.dev, |
2188 | new_smi->io.slave_addr); | |
1da177e4 | 2189 | if (rv) { |
910840f2 CM |
2190 | dev_err(new_smi->io.dev, |
2191 | "Unable to register device: error %d\n", | |
279fbd0c | 2192 | rv); |
3dd377b5 | 2193 | goto out_err_remove_attrs; |
1da177e4 LT |
2194 | } |
2195 | ||
55f91cb6 | 2196 | #ifdef CONFIG_IPMI_PROC_INTERFACE |
1da177e4 | 2197 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", |
07412736 | 2198 | &smi_type_proc_ops, |
99b76233 | 2199 | new_smi); |
1da177e4 | 2200 | if (rv) { |
910840f2 CM |
2201 | dev_err(new_smi->io.dev, |
2202 | "Unable to create proc entry: %d\n", rv); | |
1da177e4 LT |
2203 | goto out_err_stop_timer; |
2204 | } | |
2205 | ||
2206 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
07412736 | 2207 | &smi_si_stats_proc_ops, |
99b76233 | 2208 | new_smi); |
1da177e4 | 2209 | if (rv) { |
910840f2 CM |
2210 | dev_err(new_smi->io.dev, |
2211 | "Unable to create proc entry: %d\n", rv); | |
1da177e4 LT |
2212 | goto out_err_stop_timer; |
2213 | } | |
2214 | ||
b361e27b | 2215 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
07412736 | 2216 | &smi_params_proc_ops, |
99b76233 | 2217 | new_smi); |
b361e27b | 2218 | if (rv) { |
910840f2 CM |
2219 | dev_err(new_smi->io.dev, |
2220 | "Unable to create proc entry: %d\n", rv); | |
b361e27b CM |
2221 | goto out_err_stop_timer; |
2222 | } | |
55f91cb6 | 2223 | #endif |
b361e27b | 2224 | |
3f724c40 TC |
2225 | /* Don't increment till we know we have succeeded. */ |
2226 | smi_num++; | |
2227 | ||
910840f2 CM |
2228 | dev_info(new_smi->io.dev, "IPMI %s interface initialized\n", |
2229 | si_to_str[new_smi->io.si_type]); | |
1da177e4 | 2230 | |
910840f2 | 2231 | WARN_ON(new_smi->io.dev->init_name != NULL); |
1abf71ee CM |
2232 | kfree(init_name); |
2233 | ||
1da177e4 LT |
2234 | return 0; |
2235 | ||
3dd377b5 CM |
2236 | out_err_remove_attrs: |
2237 | device_remove_group(new_smi->io.dev, &ipmi_si_dev_attr_group); | |
2238 | dev_set_drvdata(new_smi->io.dev, NULL); | |
2239 | ||
76824852 | 2240 | out_err_stop_timer: |
a9a2c44f | 2241 | wait_for_timer_and_thread(new_smi); |
1da177e4 | 2242 | |
76824852 | 2243 | out_err: |
7aefac26 | 2244 | new_smi->interrupt_disabled = true; |
2407d77a MG |
2245 | |
2246 | if (new_smi->intf) { | |
b874b985 | 2247 | ipmi_smi_t intf = new_smi->intf; |
2407d77a | 2248 | new_smi->intf = NULL; |
b874b985 | 2249 | ipmi_unregister_smi(intf); |
2407d77a | 2250 | } |
1da177e4 | 2251 | |
4f3e8199 CM |
2252 | if (new_smi->io.irq_cleanup) { |
2253 | new_smi->io.irq_cleanup(&new_smi->io); | |
2254 | new_smi->io.irq_cleanup = NULL; | |
2407d77a | 2255 | } |
1da177e4 | 2256 | |
c305e3d3 CM |
2257 | /* |
2258 | * Wait until we know that we are out of any interrupt | |
2259 | * handlers might have been running before we freed the | |
2260 | * interrupt. | |
2261 | */ | |
fbd568a3 | 2262 | synchronize_sched(); |
1da177e4 LT |
2263 | |
2264 | if (new_smi->si_sm) { | |
2265 | if (new_smi->handlers) | |
2266 | new_smi->handlers->cleanup(new_smi->si_sm); | |
2267 | kfree(new_smi->si_sm); | |
2407d77a | 2268 | new_smi->si_sm = NULL; |
1da177e4 | 2269 | } |
910840f2 CM |
2270 | if (new_smi->io.addr_source_cleanup) { |
2271 | new_smi->io.addr_source_cleanup(&new_smi->io); | |
2272 | new_smi->io.addr_source_cleanup = NULL; | |
2407d77a | 2273 | } |
e1eeb7f8 CM |
2274 | if (new_smi->io.io_cleanup) { |
2275 | new_smi->io.io_cleanup(&new_smi->io); | |
2276 | new_smi->io.io_cleanup = NULL; | |
2407d77a | 2277 | } |
1da177e4 | 2278 | |
910840f2 | 2279 | if (new_smi->pdev) { |
50c812b2 | 2280 | platform_device_unregister(new_smi->pdev); |
1abf71ee CM |
2281 | new_smi->pdev = NULL; |
2282 | } else if (new_smi->pdev) { | |
2283 | platform_device_put(new_smi->pdev); | |
2407d77a | 2284 | } |
b0defcdb | 2285 | |
1abf71ee CM |
2286 | kfree(init_name); |
2287 | ||
1da177e4 LT |
2288 | return rv; |
2289 | } | |
2290 | ||
2223cbec | 2291 | static int init_ipmi_si(void) |
1da177e4 | 2292 | { |
2407d77a | 2293 | struct smi_info *e; |
06ee4594 | 2294 | enum ipmi_addr_src type = SI_INVALID; |
1da177e4 LT |
2295 | |
2296 | if (initialized) | |
2297 | return 0; | |
1da177e4 | 2298 | |
bb2a08c0 | 2299 | pr_info("IPMI System Interface driver.\n"); |
1da177e4 | 2300 | |
d8cc5267 | 2301 | /* If the user gave us a device, they presumably want us to use it */ |
7a453308 CM |
2302 | if (!ipmi_si_hardcode_find_bmc()) |
2303 | goto do_scan; | |
d8cc5267 | 2304 | |
9d70029e CM |
2305 | ipmi_si_platform_init(); |
2306 | ||
13d0b35c | 2307 | ipmi_si_pci_init(); |
b0defcdb | 2308 | |
c6f85a75 | 2309 | ipmi_si_parisc_init(); |
fdbeb7de | 2310 | |
06ee4594 MG |
2311 | /* We prefer devices with interrupts, but in the case of a machine |
2312 | with multiple BMCs we assume that there will be several instances | |
2313 | of a given type so if we succeed in registering a type then also | |
2314 | try to register everything else of the same type */ | |
7a453308 | 2315 | do_scan: |
2407d77a MG |
2316 | mutex_lock(&smi_infos_lock); |
2317 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 MG |
2318 | /* Try to register a device if it has an IRQ and we either |
2319 | haven't successfully registered a device yet or this | |
2320 | device has the same type as one we successfully registered */ | |
910840f2 | 2321 | if (e->io.irq && (!type || e->io.addr_source == type)) { |
d8cc5267 | 2322 | if (!try_smi_init(e)) { |
910840f2 | 2323 | type = e->io.addr_source; |
d8cc5267 MG |
2324 | } |
2325 | } | |
2326 | } | |
2327 | ||
06ee4594 | 2328 | /* type will only have been set if we successfully registered an si */ |
bb398a4c CM |
2329 | if (type) |
2330 | goto skip_fallback_noirq; | |
06ee4594 | 2331 | |
d8cc5267 MG |
2332 | /* Fall back to the preferred device */ |
2333 | ||
2334 | list_for_each_entry(e, &smi_infos, link) { | |
910840f2 | 2335 | if (!e->io.irq && (!type || e->io.addr_source == type)) { |
d8cc5267 | 2336 | if (!try_smi_init(e)) { |
910840f2 | 2337 | type = e->io.addr_source; |
d8cc5267 MG |
2338 | } |
2339 | } | |
2407d77a | 2340 | } |
bb398a4c CM |
2341 | |
2342 | skip_fallback_noirq: | |
2343 | initialized = 1; | |
2407d77a MG |
2344 | mutex_unlock(&smi_infos_lock); |
2345 | ||
06ee4594 MG |
2346 | if (type) |
2347 | return 0; | |
2348 | ||
d6dfd131 | 2349 | mutex_lock(&smi_infos_lock); |
b361e27b | 2350 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 2351 | mutex_unlock(&smi_infos_lock); |
d2478521 | 2352 | cleanup_ipmi_si(); |
bb2a08c0 | 2353 | pr_warn(PFX "Unable to find any System Interface(s)\n"); |
1da177e4 | 2354 | return -ENODEV; |
b0defcdb | 2355 | } else { |
d6dfd131 | 2356 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 2357 | return 0; |
1da177e4 | 2358 | } |
1da177e4 LT |
2359 | } |
2360 | module_init(init_ipmi_si); | |
2361 | ||
b361e27b | 2362 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 | 2363 | { |
2407d77a | 2364 | int rv = 0; |
1da177e4 | 2365 | |
b0defcdb | 2366 | if (!to_clean) |
1da177e4 LT |
2367 | return; |
2368 | ||
b874b985 CM |
2369 | if (to_clean->intf) { |
2370 | ipmi_smi_t intf = to_clean->intf; | |
2371 | ||
2372 | to_clean->intf = NULL; | |
2373 | rv = ipmi_unregister_smi(intf); | |
2374 | if (rv) { | |
2375 | pr_err(PFX "Unable to unregister device: errno=%d\n", | |
2376 | rv); | |
2377 | } | |
2378 | } | |
2379 | ||
3dd377b5 CM |
2380 | device_remove_group(to_clean->io.dev, &ipmi_si_dev_attr_group); |
2381 | dev_set_drvdata(to_clean->io.dev, NULL); | |
2382 | ||
b0defcdb CM |
2383 | list_del(&to_clean->link); |
2384 | ||
c305e3d3 | 2385 | /* |
b874b985 CM |
2386 | * Make sure that interrupts, the timer and the thread are |
2387 | * stopped and will not run again. | |
c305e3d3 | 2388 | */ |
4f3e8199 CM |
2389 | if (to_clean->io.irq_cleanup) |
2390 | to_clean->io.irq_cleanup(&to_clean->io); | |
a9a2c44f | 2391 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 2392 | |
c305e3d3 CM |
2393 | /* |
2394 | * Timeouts are stopped, now make sure the interrupts are off | |
b874b985 CM |
2395 | * in the BMC. Note that timers and CPU interrupts are off, |
2396 | * so no need for locks. | |
c305e3d3 | 2397 | */ |
ee6cd5f8 | 2398 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
ee6cd5f8 CM |
2399 | poll(to_clean); |
2400 | schedule_timeout_uninterruptible(1); | |
ee6cd5f8 | 2401 | } |
7e030d6d CM |
2402 | if (to_clean->handlers) |
2403 | disable_si_irq(to_clean, false); | |
e8b33617 | 2404 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 2405 | poll(to_clean); |
da4cd8df | 2406 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2407 | } |
2408 | ||
2407d77a MG |
2409 | if (to_clean->handlers) |
2410 | to_clean->handlers->cleanup(to_clean->si_sm); | |
1da177e4 LT |
2411 | |
2412 | kfree(to_clean->si_sm); | |
2413 | ||
910840f2 CM |
2414 | if (to_clean->io.addr_source_cleanup) |
2415 | to_clean->io.addr_source_cleanup(&to_clean->io); | |
e1eeb7f8 CM |
2416 | if (to_clean->io.io_cleanup) |
2417 | to_clean->io.io_cleanup(&to_clean->io); | |
50c812b2 | 2418 | |
910840f2 | 2419 | if (to_clean->pdev) |
50c812b2 CM |
2420 | platform_device_unregister(to_clean->pdev); |
2421 | ||
2422 | kfree(to_clean); | |
1da177e4 LT |
2423 | } |
2424 | ||
bb398a4c CM |
2425 | int ipmi_si_remove_by_dev(struct device *dev) |
2426 | { | |
2427 | struct smi_info *e; | |
2428 | int rv = -ENOENT; | |
2429 | ||
2430 | mutex_lock(&smi_infos_lock); | |
2431 | list_for_each_entry(e, &smi_infos, link) { | |
2432 | if (e->io.dev == dev) { | |
2433 | cleanup_one_si(e); | |
2434 | rv = 0; | |
2435 | break; | |
2436 | } | |
2437 | } | |
2438 | mutex_unlock(&smi_infos_lock); | |
2439 | ||
2440 | return rv; | |
2441 | } | |
2442 | ||
44814ec9 CM |
2443 | void ipmi_si_remove_by_data(int addr_space, enum si_type si_type, |
2444 | unsigned long addr) | |
2445 | { | |
2446 | /* remove */ | |
2447 | struct smi_info *e, *tmp_e; | |
2448 | ||
2449 | mutex_lock(&smi_infos_lock); | |
2450 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
2451 | if (e->io.addr_type != addr_space) | |
2452 | continue; | |
2453 | if (e->io.si_type != si_type) | |
2454 | continue; | |
2455 | if (e->io.addr_data == addr) | |
2456 | cleanup_one_si(e); | |
2457 | } | |
2458 | mutex_unlock(&smi_infos_lock); | |
2459 | } | |
2460 | ||
0dcf334c | 2461 | static void cleanup_ipmi_si(void) |
1da177e4 | 2462 | { |
b0defcdb | 2463 | struct smi_info *e, *tmp_e; |
1da177e4 | 2464 | |
b0defcdb | 2465 | if (!initialized) |
1da177e4 LT |
2466 | return; |
2467 | ||
13d0b35c | 2468 | ipmi_si_pci_shutdown(); |
c6f85a75 CM |
2469 | |
2470 | ipmi_si_parisc_shutdown(); | |
b0defcdb | 2471 | |
9d70029e | 2472 | ipmi_si_platform_shutdown(); |
dba9b4f6 | 2473 | |
d6dfd131 | 2474 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
2475 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
2476 | cleanup_one_si(e); | |
d6dfd131 | 2477 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
2478 | } |
2479 | module_exit(cleanup_ipmi_si); | |
2480 | ||
0944d889 | 2481 | MODULE_ALIAS("platform:dmi-ipmi-si"); |
1da177e4 | 2482 | MODULE_LICENSE("GPL"); |
1fdd75bd | 2483 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
2484 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
2485 | " system interfaces."); |