Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * ipmi_si.c | |
3 | * | |
4 | * The interface to the IPMI driver for the system interfaces (KCS, SMIC, | |
5 | * BT). | |
6 | * | |
7 | * Author: MontaVista Software, Inc. | |
8 | * Corey Minyard <minyard@mvista.com> | |
9 | * source@mvista.com | |
10 | * | |
11 | * Copyright 2002 MontaVista Software Inc. | |
dba9b4f6 | 12 | * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com> |
1da177e4 LT |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify it | |
15 | * under the terms of the GNU General Public License as published by the | |
16 | * Free Software Foundation; either version 2 of the License, or (at your | |
17 | * option) any later version. | |
18 | * | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
21 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
22 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
25 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
26 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
27 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
28 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
29 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License along | |
32 | * with this program; if not, write to the Free Software Foundation, Inc., | |
33 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * This file holds the "policy" for the interface to the SMI state | |
38 | * machine. It does the configuration, handles timers and interrupts, | |
39 | * and drives the real SMI state machine. | |
40 | */ | |
41 | ||
1da177e4 LT |
42 | #include <linux/module.h> |
43 | #include <linux/moduleparam.h> | |
1da177e4 | 44 | #include <linux/sched.h> |
07412736 | 45 | #include <linux/seq_file.h> |
1da177e4 LT |
46 | #include <linux/timer.h> |
47 | #include <linux/errno.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/ioport.h> | |
ea94027b | 54 | #include <linux/notifier.h> |
b0defcdb | 55 | #include <linux/mutex.h> |
e9a705a0 | 56 | #include <linux/kthread.h> |
1da177e4 | 57 | #include <asm/irq.h> |
1da177e4 LT |
58 | #include <linux/interrupt.h> |
59 | #include <linux/rcupdate.h> | |
16f4232c | 60 | #include <linux/ipmi.h> |
1da177e4 LT |
61 | #include <linux/ipmi_smi.h> |
62 | #include <asm/io.h> | |
63 | #include "ipmi_si_sm.h" | |
b224cd3a | 64 | #include <linux/dmi.h> |
b361e27b CM |
65 | #include <linux/string.h> |
66 | #include <linux/ctype.h> | |
9e368fa0 | 67 | #include <linux/pnp.h> |
11c675ce SR |
68 | #include <linux/of_device.h> |
69 | #include <linux/of_platform.h> | |
672d8eaf RH |
70 | #include <linux/of_address.h> |
71 | #include <linux/of_irq.h> | |
dba9b4f6 | 72 | |
fdbeb7de TB |
73 | #ifdef CONFIG_PARISC |
74 | #include <asm/hardware.h> /* for register_parisc_driver() stuff */ | |
75 | #include <asm/parisc-device.h> | |
76 | #endif | |
77 | ||
b361e27b | 78 | #define PFX "ipmi_si: " |
1da177e4 LT |
79 | |
80 | /* Measure times between events in the driver. */ | |
81 | #undef DEBUG_TIMING | |
82 | ||
83 | /* Call every 10 ms. */ | |
84 | #define SI_TIMEOUT_TIME_USEC 10000 | |
85 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
86 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
87 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
c305e3d3 | 88 | short timeout */ |
1da177e4 LT |
89 | |
90 | enum si_intf_state { | |
91 | SI_NORMAL, | |
92 | SI_GETTING_FLAGS, | |
93 | SI_GETTING_EVENTS, | |
94 | SI_CLEARING_FLAGS, | |
1da177e4 | 95 | SI_GETTING_MESSAGES, |
d9b7e4f7 CM |
96 | SI_CHECKING_ENABLES, |
97 | SI_SETTING_ENABLES | |
1da177e4 LT |
98 | /* FIXME - add watchdog stuff. */ |
99 | }; | |
100 | ||
9dbf68f9 CM |
101 | /* Some BT-specific defines we need here. */ |
102 | #define IPMI_BT_INTMASK_REG 2 | |
103 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
104 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
105 | ||
1da177e4 LT |
106 | enum si_type { |
107 | SI_KCS, SI_SMIC, SI_BT | |
108 | }; | |
b361e27b | 109 | static char *si_to_str[] = { "kcs", "smic", "bt" }; |
1da177e4 | 110 | |
50c812b2 CM |
111 | #define DEVICE_NAME "ipmi_si" |
112 | ||
a1e9c9dd | 113 | static struct platform_driver ipmi_driver; |
64959e2d CM |
114 | |
115 | /* | |
116 | * Indexes into stats[] in smi_info below. | |
117 | */ | |
ba8ff1c6 CM |
118 | enum si_stat_indexes { |
119 | /* | |
120 | * Number of times the driver requested a timer while an operation | |
121 | * was in progress. | |
122 | */ | |
123 | SI_STAT_short_timeouts = 0, | |
124 | ||
125 | /* | |
126 | * Number of times the driver requested a timer while nothing was in | |
127 | * progress. | |
128 | */ | |
129 | SI_STAT_long_timeouts, | |
130 | ||
131 | /* Number of times the interface was idle while being polled. */ | |
132 | SI_STAT_idles, | |
133 | ||
134 | /* Number of interrupts the driver handled. */ | |
135 | SI_STAT_interrupts, | |
136 | ||
137 | /* Number of time the driver got an ATTN from the hardware. */ | |
138 | SI_STAT_attentions, | |
64959e2d | 139 | |
ba8ff1c6 CM |
140 | /* Number of times the driver requested flags from the hardware. */ |
141 | SI_STAT_flag_fetches, | |
142 | ||
143 | /* Number of times the hardware didn't follow the state machine. */ | |
144 | SI_STAT_hosed_count, | |
145 | ||
146 | /* Number of completed messages. */ | |
147 | SI_STAT_complete_transactions, | |
148 | ||
149 | /* Number of IPMI events received from the hardware. */ | |
150 | SI_STAT_events, | |
151 | ||
152 | /* Number of watchdog pretimeouts. */ | |
153 | SI_STAT_watchdog_pretimeouts, | |
154 | ||
b3834be5 | 155 | /* Number of asynchronous messages received. */ |
ba8ff1c6 CM |
156 | SI_STAT_incoming_messages, |
157 | ||
158 | ||
159 | /* This *must* remain last, add new values above this. */ | |
160 | SI_NUM_STATS | |
161 | }; | |
64959e2d | 162 | |
c305e3d3 | 163 | struct smi_info { |
a9a2c44f | 164 | int intf_num; |
1da177e4 LT |
165 | ipmi_smi_t intf; |
166 | struct si_sm_data *si_sm; | |
167 | struct si_sm_handlers *handlers; | |
168 | enum si_type si_type; | |
169 | spinlock_t si_lock; | |
b874b985 | 170 | struct ipmi_smi_msg *waiting_msg; |
1da177e4 LT |
171 | struct ipmi_smi_msg *curr_msg; |
172 | enum si_intf_state si_state; | |
173 | ||
c305e3d3 CM |
174 | /* |
175 | * Used to handle the various types of I/O that can occur with | |
176 | * IPMI | |
177 | */ | |
1da177e4 LT |
178 | struct si_sm_io io; |
179 | int (*io_setup)(struct smi_info *info); | |
180 | void (*io_cleanup)(struct smi_info *info); | |
181 | int (*irq_setup)(struct smi_info *info); | |
182 | void (*irq_cleanup)(struct smi_info *info); | |
183 | unsigned int io_size; | |
5fedc4a2 | 184 | enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */ |
b0defcdb CM |
185 | void (*addr_source_cleanup)(struct smi_info *info); |
186 | void *addr_source_data; | |
1da177e4 | 187 | |
c305e3d3 CM |
188 | /* |
189 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
190 | * when handle_flags() needs to be re-run or 0 indicating it | |
191 | * set si_state itself. | |
192 | */ | |
3ae0e0f9 CM |
193 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
194 | ||
c305e3d3 CM |
195 | /* |
196 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
197 | * is set to hold the flags until we are done handling everything | |
198 | * from the flags. | |
199 | */ | |
1da177e4 LT |
200 | #define RECEIVE_MSG_AVAIL 0x01 |
201 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
202 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
203 | #define OEM0_DATA_AVAIL 0x20 |
204 | #define OEM1_DATA_AVAIL 0x40 | |
205 | #define OEM2_DATA_AVAIL 0x80 | |
206 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
207 | OEM1_DATA_AVAIL | \ |
208 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
209 | unsigned char msg_flags; |
210 | ||
40112ae7 | 211 | /* Does the BMC have an event buffer? */ |
7aefac26 | 212 | bool has_event_buffer; |
40112ae7 | 213 | |
c305e3d3 CM |
214 | /* |
215 | * If set to true, this will request events the next time the | |
216 | * state machine is idle. | |
217 | */ | |
1da177e4 LT |
218 | atomic_t req_events; |
219 | ||
c305e3d3 CM |
220 | /* |
221 | * If true, run the state machine to completion on every send | |
222 | * call. Generally used after a panic to make sure stuff goes | |
223 | * out. | |
224 | */ | |
7aefac26 | 225 | bool run_to_completion; |
1da177e4 LT |
226 | |
227 | /* The I/O port of an SI interface. */ | |
228 | int port; | |
229 | ||
c305e3d3 CM |
230 | /* |
231 | * The space between start addresses of the two ports. For | |
232 | * instance, if the first port is 0xca2 and the spacing is 4, then | |
233 | * the second port is 0xca6. | |
234 | */ | |
1da177e4 LT |
235 | unsigned int spacing; |
236 | ||
237 | /* zero if no irq; */ | |
238 | int irq; | |
239 | ||
240 | /* The timer for this si. */ | |
241 | struct timer_list si_timer; | |
242 | ||
48e8ac29 BS |
243 | /* This flag is set, if the timer is running (timer_pending() isn't enough) */ |
244 | bool timer_running; | |
245 | ||
1da177e4 LT |
246 | /* The time (in jiffies) the last timeout occurred at. */ |
247 | unsigned long last_timeout_jiffies; | |
248 | ||
89986496 CM |
249 | /* Are we waiting for the events, pretimeouts, received msgs? */ |
250 | atomic_t need_watch; | |
251 | ||
c305e3d3 CM |
252 | /* |
253 | * The driver will disable interrupts when it gets into a | |
254 | * situation where it cannot handle messages due to lack of | |
255 | * memory. Once that situation clears up, it will re-enable | |
256 | * interrupts. | |
257 | */ | |
7aefac26 | 258 | bool interrupt_disabled; |
1da177e4 | 259 | |
d9b7e4f7 CM |
260 | /* |
261 | * Does the BMC support events? | |
262 | */ | |
263 | bool supports_event_msg_buff; | |
264 | ||
a8df150c CM |
265 | /* |
266 | * Did we get an attention that we did not handle? | |
267 | */ | |
268 | bool got_attn; | |
269 | ||
50c812b2 | 270 | /* From the get device id response... */ |
3ae0e0f9 | 271 | struct ipmi_device_id device_id; |
1da177e4 | 272 | |
50c812b2 CM |
273 | /* Driver model stuff. */ |
274 | struct device *dev; | |
275 | struct platform_device *pdev; | |
276 | ||
c305e3d3 CM |
277 | /* |
278 | * True if we allocated the device, false if it came from | |
279 | * someplace else (like PCI). | |
280 | */ | |
7aefac26 | 281 | bool dev_registered; |
50c812b2 | 282 | |
1da177e4 LT |
283 | /* Slave address, could be reported from DMI. */ |
284 | unsigned char slave_addr; | |
285 | ||
286 | /* Counters and things for the proc filesystem. */ | |
64959e2d | 287 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 288 | |
c305e3d3 | 289 | struct task_struct *thread; |
b0defcdb CM |
290 | |
291 | struct list_head link; | |
16f4232c | 292 | union ipmi_smi_info_union addr_info; |
1da177e4 LT |
293 | }; |
294 | ||
64959e2d CM |
295 | #define smi_inc_stat(smi, stat) \ |
296 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
297 | #define smi_get_stat(smi, stat) \ | |
298 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
299 | ||
a51f4a81 CM |
300 | #define SI_MAX_PARMS 4 |
301 | ||
302 | static int force_kipmid[SI_MAX_PARMS]; | |
303 | static int num_force_kipmid; | |
56480287 | 304 | #ifdef CONFIG_PCI |
7aefac26 | 305 | static bool pci_registered; |
56480287 | 306 | #endif |
561f8182 | 307 | #ifdef CONFIG_ACPI |
7aefac26 | 308 | static bool pnp_registered; |
561f8182 | 309 | #endif |
fdbeb7de | 310 | #ifdef CONFIG_PARISC |
7aefac26 | 311 | static bool parisc_registered; |
fdbeb7de | 312 | #endif |
a51f4a81 | 313 | |
ae74e823 MW |
314 | static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; |
315 | static int num_max_busy_us; | |
316 | ||
7aefac26 | 317 | static bool unload_when_empty = true; |
b361e27b | 318 | |
2407d77a | 319 | static int add_smi(struct smi_info *smi); |
b0defcdb | 320 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 321 | static void cleanup_one_si(struct smi_info *to_clean); |
d2478521 | 322 | static void cleanup_ipmi_si(void); |
b0defcdb | 323 | |
f93aae9f JS |
324 | #ifdef DEBUG_TIMING |
325 | void debug_timestamp(char *msg) | |
326 | { | |
48862ea2 | 327 | struct timespec64 t; |
f93aae9f | 328 | |
48862ea2 JS |
329 | getnstimeofday64(&t); |
330 | pr_debug("**%s: %lld.%9.9ld\n", msg, (long long) t.tv_sec, t.tv_nsec); | |
f93aae9f JS |
331 | } |
332 | #else | |
333 | #define debug_timestamp(x) | |
334 | #endif | |
335 | ||
e041c683 | 336 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 337 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 338 | { |
e041c683 | 339 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
340 | } |
341 | ||
1da177e4 LT |
342 | static void deliver_recv_msg(struct smi_info *smi_info, |
343 | struct ipmi_smi_msg *msg) | |
344 | { | |
7adf579c | 345 | /* Deliver the message to the upper layer. */ |
968bf7cc CM |
346 | if (smi_info->intf) |
347 | ipmi_smi_msg_received(smi_info->intf, msg); | |
348 | else | |
349 | ipmi_free_smi_msg(msg); | |
1da177e4 LT |
350 | } |
351 | ||
4d7cbac7 | 352 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
353 | { |
354 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
355 | ||
4d7cbac7 CM |
356 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
357 | cCode = IPMI_ERR_UNSPECIFIED; | |
358 | /* else use it as is */ | |
359 | ||
25985edc | 360 | /* Make it a response */ |
1da177e4 LT |
361 | msg->rsp[0] = msg->data[0] | 4; |
362 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 363 | msg->rsp[2] = cCode; |
1da177e4 LT |
364 | msg->rsp_size = 3; |
365 | ||
366 | smi_info->curr_msg = NULL; | |
367 | deliver_recv_msg(smi_info, msg); | |
368 | } | |
369 | ||
370 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
371 | { | |
372 | int rv; | |
1da177e4 | 373 | |
b874b985 | 374 | if (!smi_info->waiting_msg) { |
1da177e4 LT |
375 | smi_info->curr_msg = NULL; |
376 | rv = SI_SM_IDLE; | |
377 | } else { | |
378 | int err; | |
379 | ||
b874b985 CM |
380 | smi_info->curr_msg = smi_info->waiting_msg; |
381 | smi_info->waiting_msg = NULL; | |
f93aae9f | 382 | debug_timestamp("Start2"); |
e041c683 AS |
383 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
384 | 0, smi_info); | |
ea94027b CM |
385 | if (err & NOTIFY_STOP_MASK) { |
386 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
387 | goto out; | |
388 | } | |
1da177e4 LT |
389 | err = smi_info->handlers->start_transaction( |
390 | smi_info->si_sm, | |
391 | smi_info->curr_msg->data, | |
392 | smi_info->curr_msg->data_size); | |
c305e3d3 | 393 | if (err) |
4d7cbac7 | 394 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
395 | |
396 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
397 | } | |
c305e3d3 | 398 | out: |
1da177e4 LT |
399 | return rv; |
400 | } | |
401 | ||
d9b7e4f7 | 402 | static void start_check_enables(struct smi_info *smi_info) |
ee6cd5f8 CM |
403 | { |
404 | unsigned char msg[2]; | |
405 | ||
406 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
407 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
408 | ||
409 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
d9b7e4f7 | 410 | smi_info->si_state = SI_CHECKING_ENABLES; |
ee6cd5f8 CM |
411 | } |
412 | ||
1da177e4 LT |
413 | static void start_clear_flags(struct smi_info *smi_info) |
414 | { | |
415 | unsigned char msg[3]; | |
416 | ||
417 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
418 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
419 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
420 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
421 | ||
422 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
423 | smi_info->si_state = SI_CLEARING_FLAGS; | |
424 | } | |
425 | ||
968bf7cc CM |
426 | static void start_getting_msg_queue(struct smi_info *smi_info) |
427 | { | |
428 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
429 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
430 | smi_info->curr_msg->data_size = 2; | |
431 | ||
432 | smi_info->handlers->start_transaction( | |
433 | smi_info->si_sm, | |
434 | smi_info->curr_msg->data, | |
435 | smi_info->curr_msg->data_size); | |
436 | smi_info->si_state = SI_GETTING_MESSAGES; | |
437 | } | |
438 | ||
439 | static void start_getting_events(struct smi_info *smi_info) | |
440 | { | |
441 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
442 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
443 | smi_info->curr_msg->data_size = 2; | |
444 | ||
445 | smi_info->handlers->start_transaction( | |
446 | smi_info->si_sm, | |
447 | smi_info->curr_msg->data, | |
448 | smi_info->curr_msg->data_size); | |
449 | smi_info->si_state = SI_GETTING_EVENTS; | |
450 | } | |
451 | ||
48e8ac29 BS |
452 | static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val) |
453 | { | |
454 | smi_info->last_timeout_jiffies = jiffies; | |
455 | mod_timer(&smi_info->si_timer, new_val); | |
456 | smi_info->timer_running = true; | |
457 | } | |
458 | ||
c305e3d3 CM |
459 | /* |
460 | * When we have a situtaion where we run out of memory and cannot | |
461 | * allocate messages, we just leave them in the BMC and run the system | |
462 | * polled until we can allocate some memory. Once we have some | |
463 | * memory, we will re-enable the interrupt. | |
464 | */ | |
968bf7cc | 465 | static inline bool disable_si_irq(struct smi_info *smi_info) |
1da177e4 | 466 | { |
b0defcdb | 467 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
7aefac26 | 468 | smi_info->interrupt_disabled = true; |
d9b7e4f7 | 469 | start_check_enables(smi_info); |
968bf7cc | 470 | return true; |
1da177e4 | 471 | } |
968bf7cc | 472 | return false; |
1da177e4 LT |
473 | } |
474 | ||
968bf7cc | 475 | static inline bool enable_si_irq(struct smi_info *smi_info) |
1da177e4 LT |
476 | { |
477 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
7aefac26 | 478 | smi_info->interrupt_disabled = false; |
d9b7e4f7 | 479 | start_check_enables(smi_info); |
968bf7cc CM |
480 | return true; |
481 | } | |
482 | return false; | |
483 | } | |
484 | ||
485 | /* | |
486 | * Allocate a message. If unable to allocate, start the interrupt | |
487 | * disable process and return NULL. If able to allocate but | |
488 | * interrupts are disabled, free the message and return NULL after | |
489 | * starting the interrupt enable process. | |
490 | */ | |
491 | static struct ipmi_smi_msg *alloc_msg_handle_irq(struct smi_info *smi_info) | |
492 | { | |
493 | struct ipmi_smi_msg *msg; | |
494 | ||
495 | msg = ipmi_alloc_smi_msg(); | |
496 | if (!msg) { | |
497 | if (!disable_si_irq(smi_info)) | |
498 | smi_info->si_state = SI_NORMAL; | |
499 | } else if (enable_si_irq(smi_info)) { | |
500 | ipmi_free_smi_msg(msg); | |
501 | msg = NULL; | |
1da177e4 | 502 | } |
968bf7cc | 503 | return msg; |
1da177e4 LT |
504 | } |
505 | ||
506 | static void handle_flags(struct smi_info *smi_info) | |
507 | { | |
3ae0e0f9 | 508 | retry: |
1da177e4 LT |
509 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
510 | /* Watchdog pre-timeout */ | |
64959e2d | 511 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 LT |
512 | |
513 | start_clear_flags(smi_info); | |
514 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
968bf7cc CM |
515 | if (smi_info->intf) |
516 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
1da177e4 LT |
517 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { |
518 | /* Messages available. */ | |
968bf7cc CM |
519 | smi_info->curr_msg = alloc_msg_handle_irq(smi_info); |
520 | if (!smi_info->curr_msg) | |
1da177e4 | 521 | return; |
1da177e4 | 522 | |
968bf7cc | 523 | start_getting_msg_queue(smi_info); |
1da177e4 LT |
524 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { |
525 | /* Events available. */ | |
968bf7cc CM |
526 | smi_info->curr_msg = alloc_msg_handle_irq(smi_info); |
527 | if (!smi_info->curr_msg) | |
1da177e4 | 528 | return; |
1da177e4 | 529 | |
968bf7cc | 530 | start_getting_events(smi_info); |
4064d5ef | 531 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 532 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
533 | if (smi_info->oem_data_avail_handler(smi_info)) |
534 | goto retry; | |
c305e3d3 | 535 | } else |
1da177e4 | 536 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
537 | } |
538 | ||
d9b7e4f7 CM |
539 | /* |
540 | * Global enables we care about. | |
541 | */ | |
542 | #define GLOBAL_ENABLES_MASK (IPMI_BMC_EVT_MSG_BUFF | IPMI_BMC_RCV_MSG_INTR | \ | |
543 | IPMI_BMC_EVT_MSG_INTR) | |
544 | ||
95c97b59 CM |
545 | static u8 current_global_enables(struct smi_info *smi_info, u8 base, |
546 | bool *irq_on) | |
d9b7e4f7 CM |
547 | { |
548 | u8 enables = 0; | |
549 | ||
550 | if (smi_info->supports_event_msg_buff) | |
551 | enables |= IPMI_BMC_EVT_MSG_BUFF; | |
552 | else | |
553 | enables &= ~IPMI_BMC_EVT_MSG_BUFF; | |
554 | ||
555 | if (smi_info->irq && !smi_info->interrupt_disabled) | |
556 | enables |= IPMI_BMC_RCV_MSG_INTR; | |
557 | else | |
558 | enables &= ~IPMI_BMC_RCV_MSG_INTR; | |
559 | ||
560 | if (smi_info->supports_event_msg_buff && | |
561 | smi_info->irq && !smi_info->interrupt_disabled) | |
562 | ||
563 | enables |= IPMI_BMC_EVT_MSG_INTR; | |
564 | else | |
565 | enables &= ~IPMI_BMC_EVT_MSG_INTR; | |
566 | ||
95c97b59 CM |
567 | *irq_on = enables & (IPMI_BMC_EVT_MSG_INTR | IPMI_BMC_RCV_MSG_INTR); |
568 | ||
d9b7e4f7 CM |
569 | return enables; |
570 | } | |
571 | ||
95c97b59 CM |
572 | static void check_bt_irq(struct smi_info *smi_info, bool irq_on) |
573 | { | |
574 | u8 irqstate = smi_info->io.inputb(&smi_info->io, IPMI_BT_INTMASK_REG); | |
575 | ||
576 | irqstate &= IPMI_BT_INTMASK_ENABLE_IRQ_BIT; | |
577 | ||
578 | if ((bool)irqstate == irq_on) | |
579 | return; | |
580 | ||
581 | if (irq_on) | |
582 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
583 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
584 | else | |
585 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, 0); | |
586 | } | |
587 | ||
1da177e4 LT |
588 | static void handle_transaction_done(struct smi_info *smi_info) |
589 | { | |
590 | struct ipmi_smi_msg *msg; | |
1da177e4 | 591 | |
f93aae9f | 592 | debug_timestamp("Done"); |
1da177e4 LT |
593 | switch (smi_info->si_state) { |
594 | case SI_NORMAL: | |
b0defcdb | 595 | if (!smi_info->curr_msg) |
1da177e4 LT |
596 | break; |
597 | ||
598 | smi_info->curr_msg->rsp_size | |
599 | = smi_info->handlers->get_result( | |
600 | smi_info->si_sm, | |
601 | smi_info->curr_msg->rsp, | |
602 | IPMI_MAX_MSG_LENGTH); | |
603 | ||
c305e3d3 CM |
604 | /* |
605 | * Do this here becase deliver_recv_msg() releases the | |
606 | * lock, and a new message can be put in during the | |
607 | * time the lock is released. | |
608 | */ | |
1da177e4 LT |
609 | msg = smi_info->curr_msg; |
610 | smi_info->curr_msg = NULL; | |
611 | deliver_recv_msg(smi_info, msg); | |
612 | break; | |
613 | ||
614 | case SI_GETTING_FLAGS: | |
615 | { | |
616 | unsigned char msg[4]; | |
617 | unsigned int len; | |
618 | ||
619 | /* We got the flags from the SMI, now handle them. */ | |
620 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
621 | if (msg[2] != 0) { | |
c305e3d3 | 622 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
623 | smi_info->si_state = SI_NORMAL; |
624 | } else if (len < 4) { | |
c305e3d3 CM |
625 | /* |
626 | * Hmm, no flags. That's technically illegal, but | |
627 | * don't use uninitialized data. | |
628 | */ | |
1da177e4 LT |
629 | smi_info->si_state = SI_NORMAL; |
630 | } else { | |
631 | smi_info->msg_flags = msg[3]; | |
632 | handle_flags(smi_info); | |
633 | } | |
634 | break; | |
635 | } | |
636 | ||
637 | case SI_CLEARING_FLAGS: | |
1da177e4 LT |
638 | { |
639 | unsigned char msg[3]; | |
640 | ||
641 | /* We cleared the flags. */ | |
642 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
643 | if (msg[2] != 0) { | |
644 | /* Error clearing flags */ | |
279fbd0c MS |
645 | dev_warn(smi_info->dev, |
646 | "Error clearing flags: %2.2x\n", msg[2]); | |
1da177e4 | 647 | } |
d9b7e4f7 | 648 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
649 | break; |
650 | } | |
651 | ||
652 | case SI_GETTING_EVENTS: | |
653 | { | |
654 | smi_info->curr_msg->rsp_size | |
655 | = smi_info->handlers->get_result( | |
656 | smi_info->si_sm, | |
657 | smi_info->curr_msg->rsp, | |
658 | IPMI_MAX_MSG_LENGTH); | |
659 | ||
c305e3d3 CM |
660 | /* |
661 | * Do this here becase deliver_recv_msg() releases the | |
662 | * lock, and a new message can be put in during the | |
663 | * time the lock is released. | |
664 | */ | |
1da177e4 LT |
665 | msg = smi_info->curr_msg; |
666 | smi_info->curr_msg = NULL; | |
667 | if (msg->rsp[2] != 0) { | |
668 | /* Error getting event, probably done. */ | |
669 | msg->done(msg); | |
670 | ||
671 | /* Take off the event flag. */ | |
672 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
673 | handle_flags(smi_info); | |
674 | } else { | |
64959e2d | 675 | smi_inc_stat(smi_info, events); |
1da177e4 | 676 | |
c305e3d3 CM |
677 | /* |
678 | * Do this before we deliver the message | |
679 | * because delivering the message releases the | |
680 | * lock and something else can mess with the | |
681 | * state. | |
682 | */ | |
1da177e4 LT |
683 | handle_flags(smi_info); |
684 | ||
685 | deliver_recv_msg(smi_info, msg); | |
686 | } | |
687 | break; | |
688 | } | |
689 | ||
690 | case SI_GETTING_MESSAGES: | |
691 | { | |
692 | smi_info->curr_msg->rsp_size | |
693 | = smi_info->handlers->get_result( | |
694 | smi_info->si_sm, | |
695 | smi_info->curr_msg->rsp, | |
696 | IPMI_MAX_MSG_LENGTH); | |
697 | ||
c305e3d3 CM |
698 | /* |
699 | * Do this here becase deliver_recv_msg() releases the | |
700 | * lock, and a new message can be put in during the | |
701 | * time the lock is released. | |
702 | */ | |
1da177e4 LT |
703 | msg = smi_info->curr_msg; |
704 | smi_info->curr_msg = NULL; | |
705 | if (msg->rsp[2] != 0) { | |
706 | /* Error getting event, probably done. */ | |
707 | msg->done(msg); | |
708 | ||
709 | /* Take off the msg flag. */ | |
710 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
711 | handle_flags(smi_info); | |
712 | } else { | |
64959e2d | 713 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 714 | |
c305e3d3 CM |
715 | /* |
716 | * Do this before we deliver the message | |
717 | * because delivering the message releases the | |
718 | * lock and something else can mess with the | |
719 | * state. | |
720 | */ | |
1da177e4 LT |
721 | handle_flags(smi_info); |
722 | ||
723 | deliver_recv_msg(smi_info, msg); | |
724 | } | |
725 | break; | |
726 | } | |
727 | ||
d9b7e4f7 | 728 | case SI_CHECKING_ENABLES: |
1da177e4 LT |
729 | { |
730 | unsigned char msg[4]; | |
d9b7e4f7 | 731 | u8 enables; |
95c97b59 | 732 | bool irq_on; |
1da177e4 LT |
733 | |
734 | /* We got the flags from the SMI, now handle them. */ | |
735 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
736 | if (msg[2] != 0) { | |
0849bfec CM |
737 | dev_warn(smi_info->dev, |
738 | "Couldn't get irq info: %x.\n", msg[2]); | |
739 | dev_warn(smi_info->dev, | |
740 | "Maybe ok, but ipmi might run very slowly.\n"); | |
1da177e4 | 741 | smi_info->si_state = SI_NORMAL; |
d9b7e4f7 CM |
742 | break; |
743 | } | |
95c97b59 CM |
744 | enables = current_global_enables(smi_info, 0, &irq_on); |
745 | if (smi_info->si_type == SI_BT) | |
746 | /* BT has its own interrupt enable bit. */ | |
747 | check_bt_irq(smi_info, irq_on); | |
d9b7e4f7 CM |
748 | if (enables != (msg[3] & GLOBAL_ENABLES_MASK)) { |
749 | /* Enables are not correct, fix them. */ | |
1da177e4 LT |
750 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
751 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
d9b7e4f7 | 752 | msg[2] = enables | (msg[3] & ~GLOBAL_ENABLES_MASK); |
1da177e4 LT |
753 | smi_info->handlers->start_transaction( |
754 | smi_info->si_sm, msg, 3); | |
d9b7e4f7 CM |
755 | smi_info->si_state = SI_SETTING_ENABLES; |
756 | } else if (smi_info->supports_event_msg_buff) { | |
757 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
758 | if (!smi_info->curr_msg) { | |
759 | smi_info->si_state = SI_NORMAL; | |
760 | break; | |
761 | } | |
762 | start_getting_msg_queue(smi_info); | |
763 | } else { | |
764 | smi_info->si_state = SI_NORMAL; | |
1da177e4 LT |
765 | } |
766 | break; | |
767 | } | |
768 | ||
d9b7e4f7 | 769 | case SI_SETTING_ENABLES: |
1da177e4 LT |
770 | { |
771 | unsigned char msg[4]; | |
772 | ||
1da177e4 | 773 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); |
d9b7e4f7 | 774 | if (msg[2] != 0) |
0849bfec | 775 | dev_warn(smi_info->dev, |
d9b7e4f7 CM |
776 | "Could not set the global enables: 0x%x.\n", |
777 | msg[2]); | |
778 | ||
779 | if (smi_info->supports_event_msg_buff) { | |
780 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
781 | if (!smi_info->curr_msg) { | |
782 | smi_info->si_state = SI_NORMAL; | |
783 | break; | |
784 | } | |
785 | start_getting_msg_queue(smi_info); | |
ee6cd5f8 | 786 | } else { |
d9b7e4f7 | 787 | smi_info->si_state = SI_NORMAL; |
ee6cd5f8 | 788 | } |
ee6cd5f8 CM |
789 | break; |
790 | } | |
1da177e4 LT |
791 | } |
792 | } | |
793 | ||
c305e3d3 CM |
794 | /* |
795 | * Called on timeouts and events. Timeouts should pass the elapsed | |
796 | * time, interrupts should pass in zero. Must be called with | |
797 | * si_lock held and interrupts disabled. | |
798 | */ | |
1da177e4 LT |
799 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
800 | int time) | |
801 | { | |
802 | enum si_sm_result si_sm_result; | |
803 | ||
804 | restart: | |
c305e3d3 CM |
805 | /* |
806 | * There used to be a loop here that waited a little while | |
807 | * (around 25us) before giving up. That turned out to be | |
808 | * pointless, the minimum delays I was seeing were in the 300us | |
809 | * range, which is far too long to wait in an interrupt. So | |
810 | * we just run until the state machine tells us something | |
811 | * happened or it needs a delay. | |
812 | */ | |
1da177e4 LT |
813 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
814 | time = 0; | |
815 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 816 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 817 | |
c305e3d3 | 818 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 819 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
820 | |
821 | handle_transaction_done(smi_info); | |
822 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 823 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 824 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 825 | |
c305e3d3 CM |
826 | /* |
827 | * Do the before return_hosed_msg, because that | |
828 | * releases the lock. | |
829 | */ | |
1da177e4 LT |
830 | smi_info->si_state = SI_NORMAL; |
831 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
832 | /* |
833 | * If we were handling a user message, format | |
834 | * a response to send to the upper layer to | |
835 | * tell it about the error. | |
836 | */ | |
4d7cbac7 | 837 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
838 | } |
839 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
840 | } | |
841 | ||
4ea18425 CM |
842 | /* |
843 | * We prefer handling attn over new messages. But don't do | |
844 | * this if there is not yet an upper layer to handle anything. | |
845 | */ | |
a8df150c CM |
846 | if (likely(smi_info->intf) && |
847 | (si_sm_result == SI_SM_ATTN || smi_info->got_attn)) { | |
1da177e4 LT |
848 | unsigned char msg[2]; |
849 | ||
a8df150c CM |
850 | if (smi_info->si_state != SI_NORMAL) { |
851 | /* | |
852 | * We got an ATTN, but we are doing something else. | |
853 | * Handle the ATTN later. | |
854 | */ | |
855 | smi_info->got_attn = true; | |
856 | } else { | |
857 | smi_info->got_attn = false; | |
858 | smi_inc_stat(smi_info, attentions); | |
1da177e4 | 859 | |
a8df150c CM |
860 | /* |
861 | * Got a attn, send down a get message flags to see | |
862 | * what's causing it. It would be better to handle | |
863 | * this in the upper layer, but due to the way | |
864 | * interrupts work with the SMI, that's not really | |
865 | * possible. | |
866 | */ | |
867 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
868 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
1da177e4 | 869 | |
a8df150c CM |
870 | smi_info->handlers->start_transaction( |
871 | smi_info->si_sm, msg, 2); | |
872 | smi_info->si_state = SI_GETTING_FLAGS; | |
873 | goto restart; | |
874 | } | |
1da177e4 LT |
875 | } |
876 | ||
877 | /* If we are currently idle, try to start the next message. */ | |
878 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 879 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
880 | |
881 | si_sm_result = start_next_msg(smi_info); | |
882 | if (si_sm_result != SI_SM_IDLE) | |
883 | goto restart; | |
c305e3d3 | 884 | } |
1da177e4 LT |
885 | |
886 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
887 | && (atomic_read(&smi_info->req_events))) { |
888 | /* | |
889 | * We are idle and the upper layer requested that I fetch | |
890 | * events, so do so. | |
891 | */ | |
55162fb1 | 892 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 893 | |
d9b7e4f7 CM |
894 | /* |
895 | * Take this opportunity to check the interrupt and | |
896 | * message enable state for the BMC. The BMC can be | |
897 | * asynchronously reset, and may thus get interrupts | |
898 | * disable and messages disabled. | |
899 | */ | |
900 | if (smi_info->supports_event_msg_buff || smi_info->irq) { | |
901 | start_check_enables(smi_info); | |
902 | } else { | |
903 | smi_info->curr_msg = alloc_msg_handle_irq(smi_info); | |
904 | if (!smi_info->curr_msg) | |
905 | goto out; | |
1da177e4 | 906 | |
d9b7e4f7 CM |
907 | start_getting_events(smi_info); |
908 | } | |
1da177e4 LT |
909 | goto restart; |
910 | } | |
55162fb1 | 911 | out: |
1da177e4 LT |
912 | return si_sm_result; |
913 | } | |
914 | ||
89986496 CM |
915 | static void check_start_timer_thread(struct smi_info *smi_info) |
916 | { | |
917 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) { | |
918 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); | |
919 | ||
920 | if (smi_info->thread) | |
921 | wake_up_process(smi_info->thread); | |
922 | ||
923 | start_next_msg(smi_info); | |
924 | smi_event_handler(smi_info, 0); | |
925 | } | |
926 | } | |
927 | ||
1da177e4 | 928 | static void sender(void *send_info, |
99ab32f3 | 929 | struct ipmi_smi_msg *msg) |
1da177e4 LT |
930 | { |
931 | struct smi_info *smi_info = send_info; | |
932 | enum si_sm_result result; | |
933 | unsigned long flags; | |
1da177e4 | 934 | |
f93aae9f | 935 | debug_timestamp("Enqueue"); |
1da177e4 LT |
936 | |
937 | if (smi_info->run_to_completion) { | |
bda4c30a | 938 | /* |
b874b985 CM |
939 | * If we are running to completion, start it and run |
940 | * transactions until everything is clear. | |
bda4c30a | 941 | */ |
1d86e29b | 942 | smi_info->curr_msg = msg; |
b874b985 | 943 | smi_info->waiting_msg = NULL; |
bda4c30a CM |
944 | |
945 | /* | |
946 | * Run to completion means we are single-threaded, no | |
947 | * need for locks. | |
948 | */ | |
1da177e4 | 949 | |
1da177e4 LT |
950 | result = smi_event_handler(smi_info, 0); |
951 | while (result != SI_SM_IDLE) { | |
952 | udelay(SI_SHORT_TIMEOUT_USEC); | |
953 | result = smi_event_handler(smi_info, | |
954 | SI_SHORT_TIMEOUT_USEC); | |
955 | } | |
1da177e4 | 956 | return; |
1da177e4 | 957 | } |
1da177e4 | 958 | |
f60adf42 | 959 | spin_lock_irqsave(&smi_info->si_lock, flags); |
1d86e29b CM |
960 | /* |
961 | * The following two lines don't need to be under the lock for | |
962 | * the lock's sake, but they do need SMP memory barriers to | |
963 | * avoid getting things out of order. We are already claiming | |
964 | * the lock, anyway, so just do it under the lock to avoid the | |
965 | * ordering problem. | |
966 | */ | |
967 | BUG_ON(smi_info->waiting_msg); | |
968 | smi_info->waiting_msg = msg; | |
89986496 | 969 | check_start_timer_thread(smi_info); |
bda4c30a | 970 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
971 | } |
972 | ||
7aefac26 | 973 | static void set_run_to_completion(void *send_info, bool i_run_to_completion) |
1da177e4 LT |
974 | { |
975 | struct smi_info *smi_info = send_info; | |
976 | enum si_sm_result result; | |
1da177e4 LT |
977 | |
978 | smi_info->run_to_completion = i_run_to_completion; | |
979 | if (i_run_to_completion) { | |
980 | result = smi_event_handler(smi_info, 0); | |
981 | while (result != SI_SM_IDLE) { | |
982 | udelay(SI_SHORT_TIMEOUT_USEC); | |
983 | result = smi_event_handler(smi_info, | |
984 | SI_SHORT_TIMEOUT_USEC); | |
985 | } | |
986 | } | |
1da177e4 LT |
987 | } |
988 | ||
ae74e823 MW |
989 | /* |
990 | * Use -1 in the nsec value of the busy waiting timespec to tell that | |
991 | * we are spinning in kipmid looking for something and not delaying | |
992 | * between checks | |
993 | */ | |
48862ea2 | 994 | static inline void ipmi_si_set_not_busy(struct timespec64 *ts) |
ae74e823 MW |
995 | { |
996 | ts->tv_nsec = -1; | |
997 | } | |
48862ea2 | 998 | static inline int ipmi_si_is_busy(struct timespec64 *ts) |
ae74e823 MW |
999 | { |
1000 | return ts->tv_nsec != -1; | |
1001 | } | |
1002 | ||
cc4cbe90 AB |
1003 | static inline int ipmi_thread_busy_wait(enum si_sm_result smi_result, |
1004 | const struct smi_info *smi_info, | |
48862ea2 | 1005 | struct timespec64 *busy_until) |
ae74e823 MW |
1006 | { |
1007 | unsigned int max_busy_us = 0; | |
1008 | ||
1009 | if (smi_info->intf_num < num_max_busy_us) | |
1010 | max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; | |
1011 | if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) | |
1012 | ipmi_si_set_not_busy(busy_until); | |
1013 | else if (!ipmi_si_is_busy(busy_until)) { | |
48862ea2 JS |
1014 | getnstimeofday64(busy_until); |
1015 | timespec64_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); | |
ae74e823 | 1016 | } else { |
48862ea2 JS |
1017 | struct timespec64 now; |
1018 | ||
1019 | getnstimeofday64(&now); | |
1020 | if (unlikely(timespec64_compare(&now, busy_until) > 0)) { | |
ae74e823 MW |
1021 | ipmi_si_set_not_busy(busy_until); |
1022 | return 0; | |
1023 | } | |
1024 | } | |
1025 | return 1; | |
1026 | } | |
1027 | ||
1028 | ||
1029 | /* | |
1030 | * A busy-waiting loop for speeding up IPMI operation. | |
1031 | * | |
1032 | * Lousy hardware makes this hard. This is only enabled for systems | |
1033 | * that are not BT and do not have interrupts. It starts spinning | |
1034 | * when an operation is complete or until max_busy tells it to stop | |
1035 | * (if that is enabled). See the paragraph on kimid_max_busy_us in | |
1036 | * Documentation/IPMI.txt for details. | |
1037 | */ | |
a9a2c44f CM |
1038 | static int ipmi_thread(void *data) |
1039 | { | |
1040 | struct smi_info *smi_info = data; | |
e9a705a0 | 1041 | unsigned long flags; |
a9a2c44f | 1042 | enum si_sm_result smi_result; |
48862ea2 | 1043 | struct timespec64 busy_until; |
a9a2c44f | 1044 | |
ae74e823 | 1045 | ipmi_si_set_not_busy(&busy_until); |
8698a745 | 1046 | set_user_nice(current, MAX_NICE); |
e9a705a0 | 1047 | while (!kthread_should_stop()) { |
ae74e823 MW |
1048 | int busy_wait; |
1049 | ||
a9a2c44f | 1050 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 1051 | smi_result = smi_event_handler(smi_info, 0); |
48e8ac29 BS |
1052 | |
1053 | /* | |
1054 | * If the driver is doing something, there is a possible | |
1055 | * race with the timer. If the timer handler see idle, | |
1056 | * and the thread here sees something else, the timer | |
1057 | * handler won't restart the timer even though it is | |
1058 | * required. So start it here if necessary. | |
1059 | */ | |
1060 | if (smi_result != SI_SM_IDLE && !smi_info->timer_running) | |
1061 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); | |
1062 | ||
a9a2c44f | 1063 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
ae74e823 MW |
1064 | busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, |
1065 | &busy_until); | |
c305e3d3 CM |
1066 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
1067 | ; /* do nothing */ | |
ae74e823 | 1068 | else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) |
33979734 | 1069 | schedule(); |
89986496 CM |
1070 | else if (smi_result == SI_SM_IDLE) { |
1071 | if (atomic_read(&smi_info->need_watch)) { | |
1072 | schedule_timeout_interruptible(100); | |
1073 | } else { | |
1074 | /* Wait to be woken up when we are needed. */ | |
1075 | __set_current_state(TASK_INTERRUPTIBLE); | |
1076 | schedule(); | |
1077 | } | |
1078 | } else | |
8d1f66dc | 1079 | schedule_timeout_interruptible(1); |
a9a2c44f | 1080 | } |
a9a2c44f CM |
1081 | return 0; |
1082 | } | |
1083 | ||
1084 | ||
1da177e4 LT |
1085 | static void poll(void *send_info) |
1086 | { | |
1087 | struct smi_info *smi_info = send_info; | |
f60adf42 | 1088 | unsigned long flags = 0; |
7aefac26 | 1089 | bool run_to_completion = smi_info->run_to_completion; |
1da177e4 | 1090 | |
15c62e10 CM |
1091 | /* |
1092 | * Make sure there is some delay in the poll loop so we can | |
1093 | * drive time forward and timeout things. | |
1094 | */ | |
1095 | udelay(10); | |
f60adf42 CM |
1096 | if (!run_to_completion) |
1097 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
15c62e10 | 1098 | smi_event_handler(smi_info, 10); |
f60adf42 CM |
1099 | if (!run_to_completion) |
1100 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1da177e4 LT |
1101 | } |
1102 | ||
1103 | static void request_events(void *send_info) | |
1104 | { | |
1105 | struct smi_info *smi_info = send_info; | |
1106 | ||
b874b985 | 1107 | if (!smi_info->has_event_buffer) |
b361e27b CM |
1108 | return; |
1109 | ||
1da177e4 LT |
1110 | atomic_set(&smi_info->req_events, 1); |
1111 | } | |
1112 | ||
7aefac26 | 1113 | static void set_need_watch(void *send_info, bool enable) |
89986496 CM |
1114 | { |
1115 | struct smi_info *smi_info = send_info; | |
1116 | unsigned long flags; | |
1117 | ||
1118 | atomic_set(&smi_info->need_watch, enable); | |
1119 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
1120 | check_start_timer_thread(smi_info); | |
1121 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1122 | } | |
1123 | ||
0c8204b3 | 1124 | static int initialized; |
1da177e4 | 1125 | |
1da177e4 LT |
1126 | static void smi_timeout(unsigned long data) |
1127 | { | |
1128 | struct smi_info *smi_info = (struct smi_info *) data; | |
1129 | enum si_sm_result smi_result; | |
1130 | unsigned long flags; | |
1131 | unsigned long jiffies_now; | |
c4edff1c | 1132 | long time_diff; |
3326f4f2 | 1133 | long timeout; |
1da177e4 | 1134 | |
1da177e4 | 1135 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
f93aae9f JS |
1136 | debug_timestamp("Timer"); |
1137 | ||
1da177e4 | 1138 | jiffies_now = jiffies; |
c4edff1c | 1139 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
1140 | * SI_USEC_PER_JIFFY); |
1141 | smi_result = smi_event_handler(smi_info, time_diff); | |
1142 | ||
b0defcdb | 1143 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 | 1144 | /* Running with interrupts, only do long timeouts. */ |
3326f4f2 | 1145 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
64959e2d | 1146 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1147 | goto do_mod_timer; |
1da177e4 LT |
1148 | } |
1149 | ||
c305e3d3 CM |
1150 | /* |
1151 | * If the state machine asks for a short delay, then shorten | |
1152 | * the timer timeout. | |
1153 | */ | |
1da177e4 | 1154 | if (smi_result == SI_SM_CALL_WITH_DELAY) { |
64959e2d | 1155 | smi_inc_stat(smi_info, short_timeouts); |
3326f4f2 | 1156 | timeout = jiffies + 1; |
1da177e4 | 1157 | } else { |
64959e2d | 1158 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1159 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1160 | } |
1161 | ||
3326f4f2 MG |
1162 | do_mod_timer: |
1163 | if (smi_result != SI_SM_IDLE) | |
48e8ac29 BS |
1164 | smi_mod_timer(smi_info, timeout); |
1165 | else | |
1166 | smi_info->timer_running = false; | |
1167 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1da177e4 LT |
1168 | } |
1169 | ||
7d12e780 | 1170 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
1171 | { |
1172 | struct smi_info *smi_info = data; | |
1173 | unsigned long flags; | |
1da177e4 LT |
1174 | |
1175 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1176 | ||
64959e2d | 1177 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1178 | |
f93aae9f JS |
1179 | debug_timestamp("Interrupt"); |
1180 | ||
1da177e4 | 1181 | smi_event_handler(smi_info, 0); |
1da177e4 LT |
1182 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1183 | return IRQ_HANDLED; | |
1184 | } | |
1185 | ||
7d12e780 | 1186 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
1187 | { |
1188 | struct smi_info *smi_info = data; | |
1189 | /* We need to clear the IRQ flag for the BT interface. */ | |
1190 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1191 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1192 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 1193 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
1194 | } |
1195 | ||
453823ba CM |
1196 | static int smi_start_processing(void *send_info, |
1197 | ipmi_smi_t intf) | |
1198 | { | |
1199 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1200 | int enable = 0; |
453823ba CM |
1201 | |
1202 | new_smi->intf = intf; | |
1203 | ||
c45adc39 CM |
1204 | /* Try to claim any interrupts. */ |
1205 | if (new_smi->irq_setup) | |
1206 | new_smi->irq_setup(new_smi); | |
1207 | ||
453823ba CM |
1208 | /* Set up the timer that drives the interface. */ |
1209 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
48e8ac29 | 1210 | smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES); |
453823ba | 1211 | |
a51f4a81 CM |
1212 | /* |
1213 | * Check if the user forcefully enabled the daemon. | |
1214 | */ | |
1215 | if (new_smi->intf_num < num_force_kipmid) | |
1216 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1217 | /* |
1218 | * The BT interface is efficient enough to not need a thread, | |
1219 | * and there is no need for a thread if we have interrupts. | |
1220 | */ | |
c305e3d3 | 1221 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
a51f4a81 CM |
1222 | enable = 1; |
1223 | ||
1224 | if (enable) { | |
453823ba CM |
1225 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1226 | "kipmi%d", new_smi->intf_num); | |
1227 | if (IS_ERR(new_smi->thread)) { | |
279fbd0c MS |
1228 | dev_notice(new_smi->dev, "Could not start" |
1229 | " kernel thread due to error %ld, only using" | |
1230 | " timers to drive the interface\n", | |
1231 | PTR_ERR(new_smi->thread)); | |
453823ba CM |
1232 | new_smi->thread = NULL; |
1233 | } | |
1234 | } | |
1235 | ||
1236 | return 0; | |
1237 | } | |
9dbf68f9 | 1238 | |
16f4232c ZY |
1239 | static int get_smi_info(void *send_info, struct ipmi_smi_info *data) |
1240 | { | |
1241 | struct smi_info *smi = send_info; | |
1242 | ||
1243 | data->addr_src = smi->addr_source; | |
1244 | data->dev = smi->dev; | |
1245 | data->addr_info = smi->addr_info; | |
1246 | get_device(smi->dev); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
7aefac26 | 1251 | static void set_maintenance_mode(void *send_info, bool enable) |
b9675136 CM |
1252 | { |
1253 | struct smi_info *smi_info = send_info; | |
1254 | ||
1255 | if (!enable) | |
1256 | atomic_set(&smi_info->req_events, 0); | |
1257 | } | |
1258 | ||
c305e3d3 | 1259 | static struct ipmi_smi_handlers handlers = { |
1da177e4 | 1260 | .owner = THIS_MODULE, |
453823ba | 1261 | .start_processing = smi_start_processing, |
16f4232c | 1262 | .get_smi_info = get_smi_info, |
1da177e4 LT |
1263 | .sender = sender, |
1264 | .request_events = request_events, | |
89986496 | 1265 | .set_need_watch = set_need_watch, |
b9675136 | 1266 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
1267 | .set_run_to_completion = set_run_to_completion, |
1268 | .poll = poll, | |
1269 | }; | |
1270 | ||
c305e3d3 CM |
1271 | /* |
1272 | * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1273 | * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. | |
1274 | */ | |
1da177e4 | 1275 | |
b0defcdb | 1276 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1277 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1278 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1279 | |
1da177e4 | 1280 | #define DEFAULT_REGSPACING 1 |
dba9b4f6 | 1281 | #define DEFAULT_REGSIZE 1 |
1da177e4 | 1282 | |
d941aeae CM |
1283 | #ifdef CONFIG_ACPI |
1284 | static bool si_tryacpi = 1; | |
1285 | #endif | |
1286 | #ifdef CONFIG_DMI | |
1287 | static bool si_trydmi = 1; | |
1288 | #endif | |
f2afae46 CM |
1289 | static bool si_tryplatform = 1; |
1290 | #ifdef CONFIG_PCI | |
1291 | static bool si_trypci = 1; | |
1292 | #endif | |
0dfe6e7e | 1293 | static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS); |
1da177e4 LT |
1294 | static char *si_type[SI_MAX_PARMS]; |
1295 | #define MAX_SI_TYPE_STR 30 | |
1296 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1297 | static unsigned long addrs[SI_MAX_PARMS]; | |
64a6f950 | 1298 | static unsigned int num_addrs; |
1da177e4 | 1299 | static unsigned int ports[SI_MAX_PARMS]; |
64a6f950 | 1300 | static unsigned int num_ports; |
1da177e4 | 1301 | static int irqs[SI_MAX_PARMS]; |
64a6f950 | 1302 | static unsigned int num_irqs; |
1da177e4 | 1303 | static int regspacings[SI_MAX_PARMS]; |
64a6f950 | 1304 | static unsigned int num_regspacings; |
1da177e4 | 1305 | static int regsizes[SI_MAX_PARMS]; |
64a6f950 | 1306 | static unsigned int num_regsizes; |
1da177e4 | 1307 | static int regshifts[SI_MAX_PARMS]; |
64a6f950 | 1308 | static unsigned int num_regshifts; |
2f95d513 | 1309 | static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ |
64a6f950 | 1310 | static unsigned int num_slave_addrs; |
1da177e4 | 1311 | |
b361e27b CM |
1312 | #define IPMI_IO_ADDR_SPACE 0 |
1313 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1314 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1315 | |
1316 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1317 | ||
1318 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1319 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1320 | " Documentation/IPMI.txt in the kernel sources for the" | |
1321 | " gory details."); | |
1da177e4 | 1322 | |
d941aeae CM |
1323 | #ifdef CONFIG_ACPI |
1324 | module_param_named(tryacpi, si_tryacpi, bool, 0); | |
1325 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1326 | " default scan of the interfaces identified via ACPI"); | |
1327 | #endif | |
1328 | #ifdef CONFIG_DMI | |
1329 | module_param_named(trydmi, si_trydmi, bool, 0); | |
1330 | MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the" | |
1331 | " default scan of the interfaces identified via DMI"); | |
1332 | #endif | |
f2afae46 CM |
1333 | module_param_named(tryplatform, si_tryplatform, bool, 0); |
1334 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1335 | " default scan of the interfaces identified via platform" | |
1336 | " interfaces like openfirmware"); | |
1337 | #ifdef CONFIG_PCI | |
1338 | module_param_named(trypci, si_trypci, bool, 0); | |
1339 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1340 | " default scan of the interfaces identified via pci"); | |
1341 | #endif | |
1da177e4 LT |
1342 | module_param_named(trydefaults, si_trydefaults, bool, 0); |
1343 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1344 | " default scan of the KCS and SMIC interface at the standard" | |
1345 | " address"); | |
1346 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1347 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1348 | " interface separated by commas. The types are 'kcs'," | |
1349 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1350 | " the first interface to kcs and the second to bt"); | |
64a6f950 | 1351 | module_param_array(addrs, ulong, &num_addrs, 0); |
1da177e4 LT |
1352 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" |
1353 | " addresses separated by commas. Only use if an interface" | |
1354 | " is in memory. Otherwise, set it to zero or leave" | |
1355 | " it blank."); | |
64a6f950 | 1356 | module_param_array(ports, uint, &num_ports, 0); |
1da177e4 LT |
1357 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" |
1358 | " addresses separated by commas. Only use if an interface" | |
1359 | " is a port. Otherwise, set it to zero or leave" | |
1360 | " it blank."); | |
1361 | module_param_array(irqs, int, &num_irqs, 0); | |
1362 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1363 | " addresses separated by commas. Only use if an interface" | |
1364 | " has an interrupt. Otherwise, set it to zero or leave" | |
1365 | " it blank."); | |
1366 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1367 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1368 | " and each successive register used by the interface. For" | |
1369 | " instance, if the start address is 0xca2 and the spacing" | |
1370 | " is 2, then the second address is at 0xca4. Defaults" | |
1371 | " to 1."); | |
1372 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1373 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1374 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1375 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1376 | " the 8-bit IPMI register has to be read from a larger" | |
1377 | " register."); | |
1378 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1379 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1380 | " IPMI register, in bits. For instance, if the data" | |
1381 | " is read from a 32-bit word and the IPMI data is in" | |
1382 | " bit 8-15, then the shift would be 8"); | |
1383 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1384 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1385 | " the controller. Normally this is 0x20, but can be" | |
1386 | " overridden by this parm. This is an array indexed" | |
1387 | " by interface number."); | |
a51f4a81 CM |
1388 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1389 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1390 | " disabled(0). Normally the IPMI driver auto-detects" | |
1391 | " this, but the value may be overridden by this parm."); | |
7aefac26 | 1392 | module_param(unload_when_empty, bool, 0); |
b361e27b CM |
1393 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" |
1394 | " specified or found, default is 1. Setting to 0" | |
1395 | " is useful for hot add of devices using hotmod."); | |
ae74e823 MW |
1396 | module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); |
1397 | MODULE_PARM_DESC(kipmid_max_busy_us, | |
1398 | "Max time (in microseconds) to busy-wait for IPMI data before" | |
1399 | " sleeping. 0 (default) means to wait forever. Set to 100-500" | |
1400 | " if kipmid is using up a lot of CPU time."); | |
1da177e4 LT |
1401 | |
1402 | ||
b0defcdb | 1403 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1404 | { |
b0defcdb CM |
1405 | if (info->si_type == SI_BT) |
1406 | /* Disable the interrupt in the BT interface. */ | |
1407 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1408 | free_irq(info->irq, info); | |
1da177e4 | 1409 | } |
1da177e4 LT |
1410 | |
1411 | static int std_irq_setup(struct smi_info *info) | |
1412 | { | |
1413 | int rv; | |
1414 | ||
b0defcdb | 1415 | if (!info->irq) |
1da177e4 LT |
1416 | return 0; |
1417 | ||
9dbf68f9 CM |
1418 | if (info->si_type == SI_BT) { |
1419 | rv = request_irq(info->irq, | |
1420 | si_bt_irq_handler, | |
aa5b2bab | 1421 | IRQF_SHARED, |
9dbf68f9 CM |
1422 | DEVICE_NAME, |
1423 | info); | |
b0defcdb | 1424 | if (!rv) |
9dbf68f9 CM |
1425 | /* Enable the interrupt in the BT interface. */ |
1426 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1427 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1428 | } else | |
1429 | rv = request_irq(info->irq, | |
1430 | si_irq_handler, | |
aa5b2bab | 1431 | IRQF_SHARED, |
9dbf68f9 CM |
1432 | DEVICE_NAME, |
1433 | info); | |
1da177e4 | 1434 | if (rv) { |
279fbd0c MS |
1435 | dev_warn(info->dev, "%s unable to claim interrupt %d," |
1436 | " running polled\n", | |
1437 | DEVICE_NAME, info->irq); | |
1da177e4 LT |
1438 | info->irq = 0; |
1439 | } else { | |
b0defcdb | 1440 | info->irq_cleanup = std_irq_cleanup; |
279fbd0c | 1441 | dev_info(info->dev, "Using irq %d\n", info->irq); |
1da177e4 LT |
1442 | } |
1443 | ||
1444 | return rv; | |
1445 | } | |
1446 | ||
1da177e4 LT |
1447 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1448 | { | |
b0defcdb | 1449 | unsigned int addr = io->addr_data; |
1da177e4 | 1450 | |
b0defcdb | 1451 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1452 | } |
1453 | ||
1454 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1455 | unsigned char b) | |
1456 | { | |
b0defcdb | 1457 | unsigned int addr = io->addr_data; |
1da177e4 | 1458 | |
b0defcdb | 1459 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1460 | } |
1461 | ||
1462 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1463 | { | |
b0defcdb | 1464 | unsigned int addr = io->addr_data; |
1da177e4 | 1465 | |
b0defcdb | 1466 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1467 | } |
1468 | ||
1469 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1470 | unsigned char b) | |
1471 | { | |
b0defcdb | 1472 | unsigned int addr = io->addr_data; |
1da177e4 | 1473 | |
b0defcdb | 1474 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1475 | } |
1476 | ||
1477 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1478 | { | |
b0defcdb | 1479 | unsigned int addr = io->addr_data; |
1da177e4 | 1480 | |
b0defcdb | 1481 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1482 | } |
1483 | ||
1484 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1485 | unsigned char b) | |
1486 | { | |
b0defcdb | 1487 | unsigned int addr = io->addr_data; |
1da177e4 | 1488 | |
b0defcdb | 1489 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1490 | } |
1491 | ||
1492 | static void port_cleanup(struct smi_info *info) | |
1493 | { | |
b0defcdb | 1494 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1495 | int idx; |
1da177e4 | 1496 | |
b0defcdb | 1497 | if (addr) { |
c305e3d3 | 1498 | for (idx = 0; idx < info->io_size; idx++) |
d61a3ead CM |
1499 | release_region(addr + idx * info->io.regspacing, |
1500 | info->io.regsize); | |
1da177e4 | 1501 | } |
1da177e4 LT |
1502 | } |
1503 | ||
1504 | static int port_setup(struct smi_info *info) | |
1505 | { | |
b0defcdb | 1506 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1507 | int idx; |
1da177e4 | 1508 | |
b0defcdb | 1509 | if (!addr) |
1da177e4 LT |
1510 | return -ENODEV; |
1511 | ||
1512 | info->io_cleanup = port_cleanup; | |
1513 | ||
c305e3d3 CM |
1514 | /* |
1515 | * Figure out the actual inb/inw/inl/etc routine to use based | |
1516 | * upon the register size. | |
1517 | */ | |
1da177e4 LT |
1518 | switch (info->io.regsize) { |
1519 | case 1: | |
1520 | info->io.inputb = port_inb; | |
1521 | info->io.outputb = port_outb; | |
1522 | break; | |
1523 | case 2: | |
1524 | info->io.inputb = port_inw; | |
1525 | info->io.outputb = port_outw; | |
1526 | break; | |
1527 | case 4: | |
1528 | info->io.inputb = port_inl; | |
1529 | info->io.outputb = port_outl; | |
1530 | break; | |
1531 | default: | |
279fbd0c MS |
1532 | dev_warn(info->dev, "Invalid register size: %d\n", |
1533 | info->io.regsize); | |
1da177e4 LT |
1534 | return -EINVAL; |
1535 | } | |
1536 | ||
c305e3d3 CM |
1537 | /* |
1538 | * Some BIOSes reserve disjoint I/O regions in their ACPI | |
d61a3ead CM |
1539 | * tables. This causes problems when trying to register the |
1540 | * entire I/O region. Therefore we must register each I/O | |
1541 | * port separately. | |
1542 | */ | |
c305e3d3 | 1543 | for (idx = 0; idx < info->io_size; idx++) { |
d61a3ead CM |
1544 | if (request_region(addr + idx * info->io.regspacing, |
1545 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1546 | /* Undo allocations */ | |
1547 | while (idx--) { | |
1548 | release_region(addr + idx * info->io.regspacing, | |
1549 | info->io.regsize); | |
1550 | } | |
1551 | return -EIO; | |
1552 | } | |
1553 | } | |
1da177e4 LT |
1554 | return 0; |
1555 | } | |
1556 | ||
546cfdf4 | 1557 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1558 | { |
1559 | return readb((io->addr)+(offset * io->regspacing)); | |
1560 | } | |
1561 | ||
546cfdf4 | 1562 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1563 | unsigned char b) |
1564 | { | |
1565 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1566 | } | |
1567 | ||
546cfdf4 | 1568 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1569 | { |
1570 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1571 | & 0xff; |
1da177e4 LT |
1572 | } |
1573 | ||
546cfdf4 | 1574 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1575 | unsigned char b) |
1576 | { | |
1577 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1578 | } | |
1579 | ||
546cfdf4 | 1580 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1581 | { |
1582 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1583 | & 0xff; |
1da177e4 LT |
1584 | } |
1585 | ||
546cfdf4 | 1586 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1587 | unsigned char b) |
1588 | { | |
1589 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1590 | } | |
1591 | ||
1592 | #ifdef readq | |
1593 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1594 | { | |
1595 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1596 | & 0xff; |
1da177e4 LT |
1597 | } |
1598 | ||
1599 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1600 | unsigned char b) | |
1601 | { | |
1602 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1603 | } | |
1604 | #endif | |
1605 | ||
1606 | static void mem_cleanup(struct smi_info *info) | |
1607 | { | |
b0defcdb | 1608 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1609 | int mapsize; |
1610 | ||
1611 | if (info->io.addr) { | |
1612 | iounmap(info->io.addr); | |
1613 | ||
1614 | mapsize = ((info->io_size * info->io.regspacing) | |
1615 | - (info->io.regspacing - info->io.regsize)); | |
1616 | ||
b0defcdb | 1617 | release_mem_region(addr, mapsize); |
1da177e4 | 1618 | } |
1da177e4 LT |
1619 | } |
1620 | ||
1621 | static int mem_setup(struct smi_info *info) | |
1622 | { | |
b0defcdb | 1623 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1624 | int mapsize; |
1625 | ||
b0defcdb | 1626 | if (!addr) |
1da177e4 LT |
1627 | return -ENODEV; |
1628 | ||
1629 | info->io_cleanup = mem_cleanup; | |
1630 | ||
c305e3d3 CM |
1631 | /* |
1632 | * Figure out the actual readb/readw/readl/etc routine to use based | |
1633 | * upon the register size. | |
1634 | */ | |
1da177e4 LT |
1635 | switch (info->io.regsize) { |
1636 | case 1: | |
546cfdf4 AD |
1637 | info->io.inputb = intf_mem_inb; |
1638 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1639 | break; |
1640 | case 2: | |
546cfdf4 AD |
1641 | info->io.inputb = intf_mem_inw; |
1642 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1643 | break; |
1644 | case 4: | |
546cfdf4 AD |
1645 | info->io.inputb = intf_mem_inl; |
1646 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1647 | break; |
1648 | #ifdef readq | |
1649 | case 8: | |
1650 | info->io.inputb = mem_inq; | |
1651 | info->io.outputb = mem_outq; | |
1652 | break; | |
1653 | #endif | |
1654 | default: | |
279fbd0c MS |
1655 | dev_warn(info->dev, "Invalid register size: %d\n", |
1656 | info->io.regsize); | |
1da177e4 LT |
1657 | return -EINVAL; |
1658 | } | |
1659 | ||
c305e3d3 CM |
1660 | /* |
1661 | * Calculate the total amount of memory to claim. This is an | |
1da177e4 LT |
1662 | * unusual looking calculation, but it avoids claiming any |
1663 | * more memory than it has to. It will claim everything | |
1664 | * between the first address to the end of the last full | |
c305e3d3 CM |
1665 | * register. |
1666 | */ | |
1da177e4 LT |
1667 | mapsize = ((info->io_size * info->io.regspacing) |
1668 | - (info->io.regspacing - info->io.regsize)); | |
1669 | ||
b0defcdb | 1670 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1671 | return -EIO; |
1672 | ||
b0defcdb | 1673 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1674 | if (info->io.addr == NULL) { |
b0defcdb | 1675 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1676 | return -EIO; |
1677 | } | |
1678 | return 0; | |
1679 | } | |
1680 | ||
b361e27b CM |
1681 | /* |
1682 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1683 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1684 | * Options are: | |
1685 | * rsp=<regspacing> | |
1686 | * rsi=<regsize> | |
1687 | * rsh=<regshift> | |
1688 | * irq=<irq> | |
1689 | * ipmb=<ipmb addr> | |
1690 | */ | |
1691 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1692 | struct hotmod_vals { | |
1693 | char *name; | |
1694 | int val; | |
1695 | }; | |
1696 | static struct hotmod_vals hotmod_ops[] = { | |
1697 | { "add", HM_ADD }, | |
1698 | { "remove", HM_REMOVE }, | |
1699 | { NULL } | |
1700 | }; | |
1701 | static struct hotmod_vals hotmod_si[] = { | |
1702 | { "kcs", SI_KCS }, | |
1703 | { "smic", SI_SMIC }, | |
1704 | { "bt", SI_BT }, | |
1705 | { NULL } | |
1706 | }; | |
1707 | static struct hotmod_vals hotmod_as[] = { | |
1708 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1709 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1710 | { NULL } | |
1711 | }; | |
1d5636cc | 1712 | |
b361e27b CM |
1713 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1714 | { | |
1715 | char *s; | |
1716 | int i; | |
1717 | ||
1718 | s = strchr(*curr, ','); | |
1719 | if (!s) { | |
1720 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1721 | return -EINVAL; | |
1722 | } | |
1723 | *s = '\0'; | |
1724 | s++; | |
ceb51ca8 | 1725 | for (i = 0; v[i].name; i++) { |
1d5636cc | 1726 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1727 | *val = v[i].val; |
1728 | *curr = s; | |
1729 | return 0; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1734 | return -EINVAL; | |
1735 | } | |
1736 | ||
1d5636cc CM |
1737 | static int check_hotmod_int_op(const char *curr, const char *option, |
1738 | const char *name, int *val) | |
1739 | { | |
1740 | char *n; | |
1741 | ||
1742 | if (strcmp(curr, name) == 0) { | |
1743 | if (!option) { | |
1744 | printk(KERN_WARNING PFX | |
1745 | "No option given for '%s'\n", | |
1746 | curr); | |
1747 | return -EINVAL; | |
1748 | } | |
1749 | *val = simple_strtoul(option, &n, 0); | |
1750 | if ((*n != '\0') || (*option == '\0')) { | |
1751 | printk(KERN_WARNING PFX | |
1752 | "Bad option given for '%s'\n", | |
1753 | curr); | |
1754 | return -EINVAL; | |
1755 | } | |
1756 | return 1; | |
1757 | } | |
1758 | return 0; | |
1759 | } | |
1760 | ||
de5e2ddf ED |
1761 | static struct smi_info *smi_info_alloc(void) |
1762 | { | |
1763 | struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1764 | ||
f60adf42 | 1765 | if (info) |
de5e2ddf | 1766 | spin_lock_init(&info->si_lock); |
de5e2ddf ED |
1767 | return info; |
1768 | } | |
1769 | ||
b361e27b CM |
1770 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1771 | { | |
1772 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1773 | int rv; |
b361e27b CM |
1774 | char *next, *curr, *s, *n, *o; |
1775 | enum hotmod_op op; | |
1776 | enum si_type si_type; | |
1777 | int addr_space; | |
1778 | unsigned long addr; | |
1779 | int regspacing; | |
1780 | int regsize; | |
1781 | int regshift; | |
1782 | int irq; | |
1783 | int ipmb; | |
1784 | int ival; | |
1d5636cc | 1785 | int len; |
b361e27b CM |
1786 | struct smi_info *info; |
1787 | ||
1788 | if (!str) | |
1789 | return -ENOMEM; | |
1790 | ||
1791 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1792 | len = strlen(str); |
1793 | ival = len - 1; | |
b361e27b CM |
1794 | while ((ival >= 0) && isspace(str[ival])) { |
1795 | str[ival] = '\0'; | |
1796 | ival--; | |
1797 | } | |
1798 | ||
1799 | for (curr = str; curr; curr = next) { | |
1800 | regspacing = 1; | |
1801 | regsize = 1; | |
1802 | regshift = 0; | |
1803 | irq = 0; | |
2f95d513 | 1804 | ipmb = 0; /* Choose the default if not specified */ |
b361e27b CM |
1805 | |
1806 | next = strchr(curr, ':'); | |
1807 | if (next) { | |
1808 | *next = '\0'; | |
1809 | next++; | |
1810 | } | |
1811 | ||
1812 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1813 | if (rv) | |
1814 | break; | |
1815 | op = ival; | |
1816 | ||
1817 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1818 | if (rv) | |
1819 | break; | |
1820 | si_type = ival; | |
1821 | ||
1822 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1823 | if (rv) | |
1824 | break; | |
1825 | ||
1826 | s = strchr(curr, ','); | |
1827 | if (s) { | |
1828 | *s = '\0'; | |
1829 | s++; | |
1830 | } | |
1831 | addr = simple_strtoul(curr, &n, 0); | |
1832 | if ((*n != '\0') || (*curr == '\0')) { | |
1833 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1834 | " '%s'\n", curr); | |
1835 | break; | |
1836 | } | |
1837 | ||
1838 | while (s) { | |
1839 | curr = s; | |
1840 | s = strchr(curr, ','); | |
1841 | if (s) { | |
1842 | *s = '\0'; | |
1843 | s++; | |
1844 | } | |
1845 | o = strchr(curr, '='); | |
1846 | if (o) { | |
1847 | *o = '\0'; | |
1848 | o++; | |
1849 | } | |
1d5636cc CM |
1850 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1851 | if (rv < 0) | |
b361e27b | 1852 | goto out; |
1d5636cc CM |
1853 | else if (rv) |
1854 | continue; | |
1855 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1856 | if (rv < 0) | |
1857 | goto out; | |
1858 | else if (rv) | |
1859 | continue; | |
1860 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1861 | if (rv < 0) | |
1862 | goto out; | |
1863 | else if (rv) | |
1864 | continue; | |
1865 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1866 | if (rv < 0) | |
1867 | goto out; | |
1868 | else if (rv) | |
1869 | continue; | |
1870 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1871 | if (rv < 0) | |
1872 | goto out; | |
1873 | else if (rv) | |
1874 | continue; | |
1875 | ||
1876 | rv = -EINVAL; | |
1877 | printk(KERN_WARNING PFX | |
1878 | "Invalid hotmod option '%s'\n", | |
1879 | curr); | |
1880 | goto out; | |
b361e27b CM |
1881 | } |
1882 | ||
1883 | if (op == HM_ADD) { | |
de5e2ddf | 1884 | info = smi_info_alloc(); |
b361e27b CM |
1885 | if (!info) { |
1886 | rv = -ENOMEM; | |
1887 | goto out; | |
1888 | } | |
1889 | ||
5fedc4a2 | 1890 | info->addr_source = SI_HOTMOD; |
b361e27b CM |
1891 | info->si_type = si_type; |
1892 | info->io.addr_data = addr; | |
1893 | info->io.addr_type = addr_space; | |
1894 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1895 | info->io_setup = mem_setup; | |
1896 | else | |
1897 | info->io_setup = port_setup; | |
1898 | ||
1899 | info->io.addr = NULL; | |
1900 | info->io.regspacing = regspacing; | |
1901 | if (!info->io.regspacing) | |
1902 | info->io.regspacing = DEFAULT_REGSPACING; | |
1903 | info->io.regsize = regsize; | |
1904 | if (!info->io.regsize) | |
1905 | info->io.regsize = DEFAULT_REGSPACING; | |
1906 | info->io.regshift = regshift; | |
1907 | info->irq = irq; | |
1908 | if (info->irq) | |
1909 | info->irq_setup = std_irq_setup; | |
1910 | info->slave_addr = ipmb; | |
1911 | ||
d02b3709 CM |
1912 | rv = add_smi(info); |
1913 | if (rv) { | |
7faefea6 | 1914 | kfree(info); |
d02b3709 CM |
1915 | goto out; |
1916 | } | |
1917 | rv = try_smi_init(info); | |
1918 | if (rv) { | |
1919 | cleanup_one_si(info); | |
1920 | goto out; | |
7faefea6 | 1921 | } |
b361e27b CM |
1922 | } else { |
1923 | /* remove */ | |
1924 | struct smi_info *e, *tmp_e; | |
1925 | ||
1926 | mutex_lock(&smi_infos_lock); | |
1927 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1928 | if (e->io.addr_type != addr_space) | |
1929 | continue; | |
1930 | if (e->si_type != si_type) | |
1931 | continue; | |
1932 | if (e->io.addr_data == addr) | |
1933 | cleanup_one_si(e); | |
1934 | } | |
1935 | mutex_unlock(&smi_infos_lock); | |
1936 | } | |
1937 | } | |
1d5636cc | 1938 | rv = len; |
b361e27b CM |
1939 | out: |
1940 | kfree(str); | |
1941 | return rv; | |
1942 | } | |
b0defcdb | 1943 | |
2223cbec | 1944 | static int hardcode_find_bmc(void) |
1da177e4 | 1945 | { |
a1e9c9dd | 1946 | int ret = -ENODEV; |
b0defcdb | 1947 | int i; |
1da177e4 LT |
1948 | struct smi_info *info; |
1949 | ||
b0defcdb CM |
1950 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1951 | if (!ports[i] && !addrs[i]) | |
1952 | continue; | |
1da177e4 | 1953 | |
de5e2ddf | 1954 | info = smi_info_alloc(); |
b0defcdb | 1955 | if (!info) |
a1e9c9dd | 1956 | return -ENOMEM; |
1da177e4 | 1957 | |
5fedc4a2 | 1958 | info->addr_source = SI_HARDCODED; |
279fbd0c | 1959 | printk(KERN_INFO PFX "probing via hardcoded address\n"); |
1da177e4 | 1960 | |
1d5636cc | 1961 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1962 | info->si_type = SI_KCS; |
1d5636cc | 1963 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1964 | info->si_type = SI_SMIC; |
1d5636cc | 1965 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1966 | info->si_type = SI_BT; |
1967 | } else { | |
279fbd0c | 1968 | printk(KERN_WARNING PFX "Interface type specified " |
b0defcdb CM |
1969 | "for interface %d, was invalid: %s\n", |
1970 | i, si_type[i]); | |
1971 | kfree(info); | |
1972 | continue; | |
1973 | } | |
1da177e4 | 1974 | |
b0defcdb CM |
1975 | if (ports[i]) { |
1976 | /* An I/O port */ | |
1977 | info->io_setup = port_setup; | |
1978 | info->io.addr_data = ports[i]; | |
1979 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1980 | } else if (addrs[i]) { | |
1981 | /* A memory port */ | |
1982 | info->io_setup = mem_setup; | |
1983 | info->io.addr_data = addrs[i]; | |
1984 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1985 | } else { | |
279fbd0c MS |
1986 | printk(KERN_WARNING PFX "Interface type specified " |
1987 | "for interface %d, but port and address were " | |
1988 | "not set or set to zero.\n", i); | |
b0defcdb CM |
1989 | kfree(info); |
1990 | continue; | |
1991 | } | |
1da177e4 | 1992 | |
b0defcdb CM |
1993 | info->io.addr = NULL; |
1994 | info->io.regspacing = regspacings[i]; | |
1995 | if (!info->io.regspacing) | |
1996 | info->io.regspacing = DEFAULT_REGSPACING; | |
1997 | info->io.regsize = regsizes[i]; | |
1998 | if (!info->io.regsize) | |
1999 | info->io.regsize = DEFAULT_REGSPACING; | |
2000 | info->io.regshift = regshifts[i]; | |
2001 | info->irq = irqs[i]; | |
2002 | if (info->irq) | |
2003 | info->irq_setup = std_irq_setup; | |
2f95d513 | 2004 | info->slave_addr = slave_addrs[i]; |
1da177e4 | 2005 | |
7faefea6 | 2006 | if (!add_smi(info)) { |
2407d77a MG |
2007 | if (try_smi_init(info)) |
2008 | cleanup_one_si(info); | |
a1e9c9dd | 2009 | ret = 0; |
7faefea6 YL |
2010 | } else { |
2011 | kfree(info); | |
2012 | } | |
b0defcdb | 2013 | } |
a1e9c9dd | 2014 | return ret; |
b0defcdb | 2015 | } |
1da177e4 | 2016 | |
8466361a | 2017 | #ifdef CONFIG_ACPI |
1da177e4 LT |
2018 | |
2019 | #include <linux/acpi.h> | |
2020 | ||
c305e3d3 CM |
2021 | /* |
2022 | * Once we get an ACPI failure, we don't try any more, because we go | |
2023 | * through the tables sequentially. Once we don't find a table, there | |
2024 | * are no more. | |
2025 | */ | |
0c8204b3 | 2026 | static int acpi_failure; |
1da177e4 LT |
2027 | |
2028 | /* For GPE-type interrupts. */ | |
8b6cd8ad LM |
2029 | static u32 ipmi_acpi_gpe(acpi_handle gpe_device, |
2030 | u32 gpe_number, void *context) | |
1da177e4 LT |
2031 | { |
2032 | struct smi_info *smi_info = context; | |
2033 | unsigned long flags; | |
1da177e4 LT |
2034 | |
2035 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
2036 | ||
64959e2d | 2037 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 2038 | |
f93aae9f JS |
2039 | debug_timestamp("ACPI_GPE"); |
2040 | ||
1da177e4 | 2041 | smi_event_handler(smi_info, 0); |
1da177e4 LT |
2042 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
2043 | ||
2044 | return ACPI_INTERRUPT_HANDLED; | |
2045 | } | |
2046 | ||
b0defcdb CM |
2047 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
2048 | { | |
2049 | if (!info->irq) | |
2050 | return; | |
2051 | ||
2052 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
2053 | } | |
2054 | ||
1da177e4 LT |
2055 | static int acpi_gpe_irq_setup(struct smi_info *info) |
2056 | { | |
2057 | acpi_status status; | |
2058 | ||
b0defcdb | 2059 | if (!info->irq) |
1da177e4 LT |
2060 | return 0; |
2061 | ||
1da177e4 LT |
2062 | status = acpi_install_gpe_handler(NULL, |
2063 | info->irq, | |
2064 | ACPI_GPE_LEVEL_TRIGGERED, | |
2065 | &ipmi_acpi_gpe, | |
2066 | info); | |
2067 | if (status != AE_OK) { | |
279fbd0c MS |
2068 | dev_warn(info->dev, "%s unable to claim ACPI GPE %d," |
2069 | " running polled\n", DEVICE_NAME, info->irq); | |
1da177e4 LT |
2070 | info->irq = 0; |
2071 | return -EINVAL; | |
2072 | } else { | |
b0defcdb | 2073 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
279fbd0c | 2074 | dev_info(info->dev, "Using ACPI GPE %d\n", info->irq); |
1da177e4 LT |
2075 | return 0; |
2076 | } | |
2077 | } | |
2078 | ||
1da177e4 LT |
2079 | /* |
2080 | * Defined at | |
631dd1a8 | 2081 | * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf |
1da177e4 LT |
2082 | */ |
2083 | struct SPMITable { | |
2084 | s8 Signature[4]; | |
2085 | u32 Length; | |
2086 | u8 Revision; | |
2087 | u8 Checksum; | |
2088 | s8 OEMID[6]; | |
2089 | s8 OEMTableID[8]; | |
2090 | s8 OEMRevision[4]; | |
2091 | s8 CreatorID[4]; | |
2092 | s8 CreatorRevision[4]; | |
2093 | u8 InterfaceType; | |
2094 | u8 IPMIlegacy; | |
2095 | s16 SpecificationRevision; | |
2096 | ||
2097 | /* | |
2098 | * Bit 0 - SCI interrupt supported | |
2099 | * Bit 1 - I/O APIC/SAPIC | |
2100 | */ | |
2101 | u8 InterruptType; | |
2102 | ||
c305e3d3 CM |
2103 | /* |
2104 | * If bit 0 of InterruptType is set, then this is the SCI | |
2105 | * interrupt in the GPEx_STS register. | |
2106 | */ | |
1da177e4 LT |
2107 | u8 GPE; |
2108 | ||
2109 | s16 Reserved; | |
2110 | ||
c305e3d3 CM |
2111 | /* |
2112 | * If bit 1 of InterruptType is set, then this is the I/O | |
2113 | * APIC/SAPIC interrupt. | |
2114 | */ | |
1da177e4 LT |
2115 | u32 GlobalSystemInterrupt; |
2116 | ||
2117 | /* The actual register address. */ | |
2118 | struct acpi_generic_address addr; | |
2119 | ||
2120 | u8 UID[4]; | |
2121 | ||
2122 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
2123 | }; | |
2124 | ||
2223cbec | 2125 | static int try_init_spmi(struct SPMITable *spmi) |
1da177e4 LT |
2126 | { |
2127 | struct smi_info *info; | |
d02b3709 | 2128 | int rv; |
1da177e4 | 2129 | |
1da177e4 | 2130 | if (spmi->IPMIlegacy != 1) { |
279fbd0c MS |
2131 | printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy); |
2132 | return -ENODEV; | |
1da177e4 LT |
2133 | } |
2134 | ||
de5e2ddf | 2135 | info = smi_info_alloc(); |
b0defcdb | 2136 | if (!info) { |
279fbd0c | 2137 | printk(KERN_ERR PFX "Could not allocate SI data (3)\n"); |
b0defcdb CM |
2138 | return -ENOMEM; |
2139 | } | |
2140 | ||
5fedc4a2 | 2141 | info->addr_source = SI_SPMI; |
279fbd0c | 2142 | printk(KERN_INFO PFX "probing via SPMI\n"); |
1da177e4 | 2143 | |
1da177e4 | 2144 | /* Figure out the interface type. */ |
c305e3d3 | 2145 | switch (spmi->InterfaceType) { |
1da177e4 | 2146 | case 1: /* KCS */ |
b0defcdb | 2147 | info->si_type = SI_KCS; |
1da177e4 | 2148 | break; |
1da177e4 | 2149 | case 2: /* SMIC */ |
b0defcdb | 2150 | info->si_type = SI_SMIC; |
1da177e4 | 2151 | break; |
1da177e4 | 2152 | case 3: /* BT */ |
b0defcdb | 2153 | info->si_type = SI_BT; |
1da177e4 | 2154 | break; |
ab42bf24 CM |
2155 | case 4: /* SSIF, just ignore */ |
2156 | kfree(info); | |
2157 | return -EIO; | |
1da177e4 | 2158 | default: |
279fbd0c MS |
2159 | printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n", |
2160 | spmi->InterfaceType); | |
b0defcdb | 2161 | kfree(info); |
1da177e4 LT |
2162 | return -EIO; |
2163 | } | |
2164 | ||
1da177e4 LT |
2165 | if (spmi->InterruptType & 1) { |
2166 | /* We've got a GPE interrupt. */ | |
2167 | info->irq = spmi->GPE; | |
2168 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
2169 | } else if (spmi->InterruptType & 2) { |
2170 | /* We've got an APIC/SAPIC interrupt. */ | |
2171 | info->irq = spmi->GlobalSystemInterrupt; | |
2172 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
2173 | } else { |
2174 | /* Use the default interrupt setting. */ | |
2175 | info->irq = 0; | |
2176 | info->irq_setup = NULL; | |
2177 | } | |
2178 | ||
15a58ed1 | 2179 | if (spmi->addr.bit_width) { |
35bc37a0 | 2180 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 2181 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 2182 | } else { |
35bc37a0 CM |
2183 | info->io.regspacing = DEFAULT_REGSPACING; |
2184 | } | |
b0defcdb | 2185 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 2186 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 2187 | |
15a58ed1 | 2188 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 2189 | info->io_setup = mem_setup; |
8fe1425a | 2190 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
15a58ed1 | 2191 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 2192 | info->io_setup = port_setup; |
8fe1425a | 2193 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
2194 | } else { |
2195 | kfree(info); | |
279fbd0c | 2196 | printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n"); |
1da177e4 LT |
2197 | return -EIO; |
2198 | } | |
b0defcdb | 2199 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 2200 | |
7bb671e3 YL |
2201 | pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n", |
2202 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2203 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2204 | info->irq); | |
2205 | ||
d02b3709 CM |
2206 | rv = add_smi(info); |
2207 | if (rv) | |
7faefea6 | 2208 | kfree(info); |
1da177e4 | 2209 | |
d02b3709 | 2210 | return rv; |
1da177e4 | 2211 | } |
b0defcdb | 2212 | |
2223cbec | 2213 | static void spmi_find_bmc(void) |
b0defcdb CM |
2214 | { |
2215 | acpi_status status; | |
2216 | struct SPMITable *spmi; | |
2217 | int i; | |
2218 | ||
2219 | if (acpi_disabled) | |
2220 | return; | |
2221 | ||
2222 | if (acpi_failure) | |
2223 | return; | |
2224 | ||
2225 | for (i = 0; ; i++) { | |
15a58ed1 AS |
2226 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
2227 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
2228 | if (status != AE_OK) |
2229 | return; | |
2230 | ||
18a3e0bf | 2231 | try_init_spmi(spmi); |
b0defcdb CM |
2232 | } |
2233 | } | |
9e368fa0 | 2234 | |
2223cbec | 2235 | static int ipmi_pnp_probe(struct pnp_dev *dev, |
9e368fa0 BH |
2236 | const struct pnp_device_id *dev_id) |
2237 | { | |
2238 | struct acpi_device *acpi_dev; | |
2239 | struct smi_info *info; | |
a9e31765 | 2240 | struct resource *res, *res_second; |
9e368fa0 BH |
2241 | acpi_handle handle; |
2242 | acpi_status status; | |
2243 | unsigned long long tmp; | |
d02b3709 | 2244 | int rv; |
9e368fa0 BH |
2245 | |
2246 | acpi_dev = pnp_acpi_device(dev); | |
2247 | if (!acpi_dev) | |
2248 | return -ENODEV; | |
2249 | ||
de5e2ddf | 2250 | info = smi_info_alloc(); |
9e368fa0 BH |
2251 | if (!info) |
2252 | return -ENOMEM; | |
2253 | ||
5fedc4a2 | 2254 | info->addr_source = SI_ACPI; |
279fbd0c | 2255 | printk(KERN_INFO PFX "probing via ACPI\n"); |
9e368fa0 BH |
2256 | |
2257 | handle = acpi_dev->handle; | |
16f4232c | 2258 | info->addr_info.acpi_info.acpi_handle = handle; |
9e368fa0 BH |
2259 | |
2260 | /* _IFT tells us the interface type: KCS, BT, etc */ | |
2261 | status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp); | |
2262 | if (ACPI_FAILURE(status)) | |
2263 | goto err_free; | |
2264 | ||
2265 | switch (tmp) { | |
2266 | case 1: | |
2267 | info->si_type = SI_KCS; | |
2268 | break; | |
2269 | case 2: | |
2270 | info->si_type = SI_SMIC; | |
2271 | break; | |
2272 | case 3: | |
2273 | info->si_type = SI_BT; | |
2274 | break; | |
ab42bf24 CM |
2275 | case 4: /* SSIF, just ignore */ |
2276 | goto err_free; | |
9e368fa0 | 2277 | default: |
279fbd0c | 2278 | dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp); |
9e368fa0 BH |
2279 | goto err_free; |
2280 | } | |
2281 | ||
279fbd0c MS |
2282 | res = pnp_get_resource(dev, IORESOURCE_IO, 0); |
2283 | if (res) { | |
9e368fa0 BH |
2284 | info->io_setup = port_setup; |
2285 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
9e368fa0 | 2286 | } else { |
279fbd0c MS |
2287 | res = pnp_get_resource(dev, IORESOURCE_MEM, 0); |
2288 | if (res) { | |
2289 | info->io_setup = mem_setup; | |
2290 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2291 | } | |
2292 | } | |
2293 | if (!res) { | |
9e368fa0 BH |
2294 | dev_err(&dev->dev, "no I/O or memory address\n"); |
2295 | goto err_free; | |
2296 | } | |
279fbd0c | 2297 | info->io.addr_data = res->start; |
9e368fa0 BH |
2298 | |
2299 | info->io.regspacing = DEFAULT_REGSPACING; | |
a9e31765 | 2300 | res_second = pnp_get_resource(dev, |
d9e1b6c4 YL |
2301 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? |
2302 | IORESOURCE_IO : IORESOURCE_MEM, | |
2303 | 1); | |
a9e31765 YL |
2304 | if (res_second) { |
2305 | if (res_second->start > info->io.addr_data) | |
2306 | info->io.regspacing = res_second->start - info->io.addr_data; | |
d9e1b6c4 | 2307 | } |
9e368fa0 BH |
2308 | info->io.regsize = DEFAULT_REGSPACING; |
2309 | info->io.regshift = 0; | |
2310 | ||
2311 | /* If _GPE exists, use it; otherwise use standard interrupts */ | |
2312 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); | |
2313 | if (ACPI_SUCCESS(status)) { | |
2314 | info->irq = tmp; | |
2315 | info->irq_setup = acpi_gpe_irq_setup; | |
2316 | } else if (pnp_irq_valid(dev, 0)) { | |
2317 | info->irq = pnp_irq(dev, 0); | |
2318 | info->irq_setup = std_irq_setup; | |
2319 | } | |
2320 | ||
8c8eae27 | 2321 | info->dev = &dev->dev; |
9e368fa0 BH |
2322 | pnp_set_drvdata(dev, info); |
2323 | ||
279fbd0c MS |
2324 | dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n", |
2325 | res, info->io.regsize, info->io.regspacing, | |
2326 | info->irq); | |
2327 | ||
d02b3709 CM |
2328 | rv = add_smi(info); |
2329 | if (rv) | |
2330 | kfree(info); | |
7faefea6 | 2331 | |
d02b3709 | 2332 | return rv; |
9e368fa0 BH |
2333 | |
2334 | err_free: | |
2335 | kfree(info); | |
2336 | return -EINVAL; | |
2337 | } | |
2338 | ||
39af33fc | 2339 | static void ipmi_pnp_remove(struct pnp_dev *dev) |
9e368fa0 BH |
2340 | { |
2341 | struct smi_info *info = pnp_get_drvdata(dev); | |
2342 | ||
2343 | cleanup_one_si(info); | |
2344 | } | |
2345 | ||
2346 | static const struct pnp_device_id pnp_dev_table[] = { | |
2347 | {"IPI0001", 0}, | |
2348 | {"", 0}, | |
2349 | }; | |
2350 | ||
2351 | static struct pnp_driver ipmi_pnp_driver = { | |
2352 | .name = DEVICE_NAME, | |
2353 | .probe = ipmi_pnp_probe, | |
bcd2982a | 2354 | .remove = ipmi_pnp_remove, |
9e368fa0 BH |
2355 | .id_table = pnp_dev_table, |
2356 | }; | |
a798e2d2 JD |
2357 | |
2358 | MODULE_DEVICE_TABLE(pnp, pnp_dev_table); | |
1da177e4 LT |
2359 | #endif |
2360 | ||
a9fad4cc | 2361 | #ifdef CONFIG_DMI |
c305e3d3 | 2362 | struct dmi_ipmi_data { |
1da177e4 LT |
2363 | u8 type; |
2364 | u8 addr_space; | |
2365 | unsigned long base_addr; | |
2366 | u8 irq; | |
2367 | u8 offset; | |
2368 | u8 slave_addr; | |
b0defcdb | 2369 | }; |
1da177e4 | 2370 | |
2223cbec | 2371 | static int decode_dmi(const struct dmi_header *dm, |
b0defcdb | 2372 | struct dmi_ipmi_data *dmi) |
1da177e4 | 2373 | { |
1855256c | 2374 | const u8 *data = (const u8 *)dm; |
1da177e4 LT |
2375 | unsigned long base_addr; |
2376 | u8 reg_spacing; | |
b224cd3a | 2377 | u8 len = dm->length; |
1da177e4 | 2378 | |
b0defcdb | 2379 | dmi->type = data[4]; |
1da177e4 LT |
2380 | |
2381 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
2382 | if (len >= 0x11) { | |
2383 | if (base_addr & 1) { | |
2384 | /* I/O */ | |
2385 | base_addr &= 0xFFFE; | |
b0defcdb | 2386 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
c305e3d3 | 2387 | } else |
1da177e4 | 2388 | /* Memory */ |
b0defcdb | 2389 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
c305e3d3 | 2390 | |
1da177e4 LT |
2391 | /* If bit 4 of byte 0x10 is set, then the lsb for the address |
2392 | is odd. */ | |
b0defcdb | 2393 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 2394 | |
b0defcdb | 2395 | dmi->irq = data[0x11]; |
1da177e4 LT |
2396 | |
2397 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 2398 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
c305e3d3 | 2399 | switch (reg_spacing) { |
1da177e4 | 2400 | case 0x00: /* Byte boundaries */ |
b0defcdb | 2401 | dmi->offset = 1; |
1da177e4 LT |
2402 | break; |
2403 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 2404 | dmi->offset = 4; |
1da177e4 LT |
2405 | break; |
2406 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 2407 | dmi->offset = 16; |
1da177e4 LT |
2408 | break; |
2409 | default: | |
2410 | /* Some other interface, just ignore it. */ | |
2411 | return -EIO; | |
2412 | } | |
2413 | } else { | |
2414 | /* Old DMI spec. */ | |
c305e3d3 CM |
2415 | /* |
2416 | * Note that technically, the lower bit of the base | |
92068801 CM |
2417 | * address should be 1 if the address is I/O and 0 if |
2418 | * the address is in memory. So many systems get that | |
2419 | * wrong (and all that I have seen are I/O) so we just | |
2420 | * ignore that bit and assume I/O. Systems that use | |
c305e3d3 CM |
2421 | * memory should use the newer spec, anyway. |
2422 | */ | |
b0defcdb CM |
2423 | dmi->base_addr = base_addr & 0xfffe; |
2424 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
2425 | dmi->offset = 1; | |
1da177e4 LT |
2426 | } |
2427 | ||
b0defcdb | 2428 | dmi->slave_addr = data[6]; |
1da177e4 | 2429 | |
b0defcdb | 2430 | return 0; |
1da177e4 LT |
2431 | } |
2432 | ||
2223cbec | 2433 | static void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 2434 | { |
b0defcdb | 2435 | struct smi_info *info; |
1da177e4 | 2436 | |
de5e2ddf | 2437 | info = smi_info_alloc(); |
b0defcdb | 2438 | if (!info) { |
279fbd0c | 2439 | printk(KERN_ERR PFX "Could not allocate SI data\n"); |
b0defcdb | 2440 | return; |
1da177e4 | 2441 | } |
1da177e4 | 2442 | |
5fedc4a2 | 2443 | info->addr_source = SI_SMBIOS; |
279fbd0c | 2444 | printk(KERN_INFO PFX "probing via SMBIOS\n"); |
1da177e4 | 2445 | |
e8b33617 | 2446 | switch (ipmi_data->type) { |
b0defcdb CM |
2447 | case 0x01: /* KCS */ |
2448 | info->si_type = SI_KCS; | |
2449 | break; | |
2450 | case 0x02: /* SMIC */ | |
2451 | info->si_type = SI_SMIC; | |
2452 | break; | |
2453 | case 0x03: /* BT */ | |
2454 | info->si_type = SI_BT; | |
2455 | break; | |
2456 | default: | |
80cd6920 | 2457 | kfree(info); |
b0defcdb | 2458 | return; |
1da177e4 | 2459 | } |
1da177e4 | 2460 | |
b0defcdb CM |
2461 | switch (ipmi_data->addr_space) { |
2462 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2463 | info->io_setup = mem_setup; |
b0defcdb CM |
2464 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2465 | break; | |
2466 | ||
2467 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2468 | info->io_setup = port_setup; |
b0defcdb CM |
2469 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2470 | break; | |
2471 | ||
2472 | default: | |
1da177e4 | 2473 | kfree(info); |
279fbd0c | 2474 | printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n", |
b0defcdb CM |
2475 | ipmi_data->addr_space); |
2476 | return; | |
1da177e4 | 2477 | } |
b0defcdb | 2478 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2479 | |
b0defcdb CM |
2480 | info->io.regspacing = ipmi_data->offset; |
2481 | if (!info->io.regspacing) | |
1da177e4 LT |
2482 | info->io.regspacing = DEFAULT_REGSPACING; |
2483 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2484 | info->io.regshift = 0; |
1da177e4 LT |
2485 | |
2486 | info->slave_addr = ipmi_data->slave_addr; | |
2487 | ||
b0defcdb CM |
2488 | info->irq = ipmi_data->irq; |
2489 | if (info->irq) | |
2490 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2491 | |
7bb671e3 YL |
2492 | pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n", |
2493 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2494 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2495 | info->irq); | |
2496 | ||
7faefea6 YL |
2497 | if (add_smi(info)) |
2498 | kfree(info); | |
b0defcdb | 2499 | } |
1da177e4 | 2500 | |
2223cbec | 2501 | static void dmi_find_bmc(void) |
b0defcdb | 2502 | { |
1855256c | 2503 | const struct dmi_device *dev = NULL; |
b0defcdb CM |
2504 | struct dmi_ipmi_data data; |
2505 | int rv; | |
2506 | ||
2507 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2508 | memset(&data, 0, sizeof(data)); |
1855256c JG |
2509 | rv = decode_dmi((const struct dmi_header *) dev->device_data, |
2510 | &data); | |
b0defcdb CM |
2511 | if (!rv) |
2512 | try_init_dmi(&data); | |
2513 | } | |
1da177e4 | 2514 | } |
a9fad4cc | 2515 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2516 | |
2517 | #ifdef CONFIG_PCI | |
2518 | ||
b0defcdb CM |
2519 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2520 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2521 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2522 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2523 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2524 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2525 | ||
1da177e4 LT |
2526 | #define PCI_HP_VENDOR_ID 0x103C |
2527 | #define PCI_MMC_DEVICE_ID 0x121A | |
2528 | #define PCI_MMC_ADDR_CW 0x10 | |
2529 | ||
b0defcdb CM |
2530 | static void ipmi_pci_cleanup(struct smi_info *info) |
2531 | { | |
2532 | struct pci_dev *pdev = info->addr_source_data; | |
2533 | ||
2534 | pci_disable_device(pdev); | |
2535 | } | |
1da177e4 | 2536 | |
2223cbec | 2537 | static int ipmi_pci_probe_regspacing(struct smi_info *info) |
a6c16c28 CM |
2538 | { |
2539 | if (info->si_type == SI_KCS) { | |
2540 | unsigned char status; | |
2541 | int regspacing; | |
2542 | ||
2543 | info->io.regsize = DEFAULT_REGSIZE; | |
2544 | info->io.regshift = 0; | |
2545 | info->io_size = 2; | |
2546 | info->handlers = &kcs_smi_handlers; | |
2547 | ||
2548 | /* detect 1, 4, 16byte spacing */ | |
2549 | for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) { | |
2550 | info->io.regspacing = regspacing; | |
2551 | if (info->io_setup(info)) { | |
2552 | dev_err(info->dev, | |
2553 | "Could not setup I/O space\n"); | |
2554 | return DEFAULT_REGSPACING; | |
2555 | } | |
2556 | /* write invalid cmd */ | |
2557 | info->io.outputb(&info->io, 1, 0x10); | |
2558 | /* read status back */ | |
2559 | status = info->io.inputb(&info->io, 1); | |
2560 | info->io_cleanup(info); | |
2561 | if (status) | |
2562 | return regspacing; | |
2563 | regspacing *= 4; | |
2564 | } | |
2565 | } | |
2566 | return DEFAULT_REGSPACING; | |
2567 | } | |
2568 | ||
2223cbec | 2569 | static int ipmi_pci_probe(struct pci_dev *pdev, |
b0defcdb | 2570 | const struct pci_device_id *ent) |
1da177e4 | 2571 | { |
b0defcdb CM |
2572 | int rv; |
2573 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2574 | struct smi_info *info; | |
1da177e4 | 2575 | |
de5e2ddf | 2576 | info = smi_info_alloc(); |
b0defcdb | 2577 | if (!info) |
1cd441f9 | 2578 | return -ENOMEM; |
1da177e4 | 2579 | |
5fedc4a2 | 2580 | info->addr_source = SI_PCI; |
279fbd0c | 2581 | dev_info(&pdev->dev, "probing via PCI"); |
1da177e4 | 2582 | |
b0defcdb CM |
2583 | switch (class_type) { |
2584 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2585 | info->si_type = SI_SMIC; | |
2586 | break; | |
1da177e4 | 2587 | |
b0defcdb CM |
2588 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2589 | info->si_type = SI_KCS; | |
2590 | break; | |
2591 | ||
2592 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2593 | info->si_type = SI_BT; | |
2594 | break; | |
2595 | ||
2596 | default: | |
2597 | kfree(info); | |
279fbd0c | 2598 | dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type); |
1cd441f9 | 2599 | return -ENOMEM; |
1da177e4 LT |
2600 | } |
2601 | ||
b0defcdb CM |
2602 | rv = pci_enable_device(pdev); |
2603 | if (rv) { | |
279fbd0c | 2604 | dev_err(&pdev->dev, "couldn't enable PCI device\n"); |
b0defcdb CM |
2605 | kfree(info); |
2606 | return rv; | |
1da177e4 LT |
2607 | } |
2608 | ||
b0defcdb CM |
2609 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2610 | info->addr_source_data = pdev; | |
1da177e4 | 2611 | |
b0defcdb CM |
2612 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2613 | info->io_setup = port_setup; | |
2614 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2615 | } else { | |
2616 | info->io_setup = mem_setup; | |
2617 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2618 | } |
b0defcdb | 2619 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2620 | |
a6c16c28 CM |
2621 | info->io.regspacing = ipmi_pci_probe_regspacing(info); |
2622 | info->io.regsize = DEFAULT_REGSIZE; | |
b0defcdb | 2623 | info->io.regshift = 0; |
1da177e4 | 2624 | |
b0defcdb CM |
2625 | info->irq = pdev->irq; |
2626 | if (info->irq) | |
2627 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2628 | |
50c812b2 | 2629 | info->dev = &pdev->dev; |
fca3b747 | 2630 | pci_set_drvdata(pdev, info); |
50c812b2 | 2631 | |
279fbd0c MS |
2632 | dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n", |
2633 | &pdev->resource[0], info->io.regsize, info->io.regspacing, | |
2634 | info->irq); | |
2635 | ||
d02b3709 CM |
2636 | rv = add_smi(info); |
2637 | if (rv) { | |
7faefea6 | 2638 | kfree(info); |
d02b3709 CM |
2639 | pci_disable_device(pdev); |
2640 | } | |
7faefea6 | 2641 | |
d02b3709 | 2642 | return rv; |
b0defcdb | 2643 | } |
1da177e4 | 2644 | |
39af33fc | 2645 | static void ipmi_pci_remove(struct pci_dev *pdev) |
b0defcdb | 2646 | { |
fca3b747 CM |
2647 | struct smi_info *info = pci_get_drvdata(pdev); |
2648 | cleanup_one_si(info); | |
d02b3709 | 2649 | pci_disable_device(pdev); |
b0defcdb | 2650 | } |
1da177e4 | 2651 | |
b0defcdb CM |
2652 | static struct pci_device_id ipmi_pci_devices[] = { |
2653 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
248bdd5e KC |
2654 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, |
2655 | { 0, } | |
b0defcdb CM |
2656 | }; |
2657 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2658 | ||
2659 | static struct pci_driver ipmi_pci_driver = { | |
c305e3d3 CM |
2660 | .name = DEVICE_NAME, |
2661 | .id_table = ipmi_pci_devices, | |
2662 | .probe = ipmi_pci_probe, | |
bcd2982a | 2663 | .remove = ipmi_pci_remove, |
b0defcdb CM |
2664 | }; |
2665 | #endif /* CONFIG_PCI */ | |
1da177e4 | 2666 | |
da2ff527 | 2667 | static const struct of_device_id ipmi_match[]; |
2223cbec | 2668 | static int ipmi_probe(struct platform_device *dev) |
dba9b4f6 | 2669 | { |
a1e9c9dd | 2670 | #ifdef CONFIG_OF |
b1608d69 | 2671 | const struct of_device_id *match; |
dba9b4f6 CM |
2672 | struct smi_info *info; |
2673 | struct resource resource; | |
da81c3b9 | 2674 | const __be32 *regsize, *regspacing, *regshift; |
61c7a080 | 2675 | struct device_node *np = dev->dev.of_node; |
dba9b4f6 CM |
2676 | int ret; |
2677 | int proplen; | |
2678 | ||
279fbd0c | 2679 | dev_info(&dev->dev, "probing via device tree\n"); |
dba9b4f6 | 2680 | |
b1608d69 GL |
2681 | match = of_match_device(ipmi_match, &dev->dev); |
2682 | if (!match) | |
a1e9c9dd RH |
2683 | return -EINVAL; |
2684 | ||
08dc4169 BH |
2685 | if (!of_device_is_available(np)) |
2686 | return -EINVAL; | |
2687 | ||
dba9b4f6 CM |
2688 | ret = of_address_to_resource(np, 0, &resource); |
2689 | if (ret) { | |
2690 | dev_warn(&dev->dev, PFX "invalid address from OF\n"); | |
2691 | return ret; | |
2692 | } | |
2693 | ||
9c25099d | 2694 | regsize = of_get_property(np, "reg-size", &proplen); |
dba9b4f6 CM |
2695 | if (regsize && proplen != 4) { |
2696 | dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); | |
2697 | return -EINVAL; | |
2698 | } | |
2699 | ||
9c25099d | 2700 | regspacing = of_get_property(np, "reg-spacing", &proplen); |
dba9b4f6 CM |
2701 | if (regspacing && proplen != 4) { |
2702 | dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); | |
2703 | return -EINVAL; | |
2704 | } | |
2705 | ||
9c25099d | 2706 | regshift = of_get_property(np, "reg-shift", &proplen); |
dba9b4f6 CM |
2707 | if (regshift && proplen != 4) { |
2708 | dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); | |
2709 | return -EINVAL; | |
2710 | } | |
2711 | ||
de5e2ddf | 2712 | info = smi_info_alloc(); |
dba9b4f6 CM |
2713 | |
2714 | if (!info) { | |
2715 | dev_err(&dev->dev, | |
279fbd0c | 2716 | "could not allocate memory for OF probe\n"); |
dba9b4f6 CM |
2717 | return -ENOMEM; |
2718 | } | |
2719 | ||
b1608d69 | 2720 | info->si_type = (enum si_type) match->data; |
5fedc4a2 | 2721 | info->addr_source = SI_DEVICETREE; |
dba9b4f6 CM |
2722 | info->irq_setup = std_irq_setup; |
2723 | ||
3b7ec117 NC |
2724 | if (resource.flags & IORESOURCE_IO) { |
2725 | info->io_setup = port_setup; | |
2726 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2727 | } else { | |
2728 | info->io_setup = mem_setup; | |
2729 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2730 | } | |
2731 | ||
dba9b4f6 CM |
2732 | info->io.addr_data = resource.start; |
2733 | ||
da81c3b9 RH |
2734 | info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE; |
2735 | info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING; | |
2736 | info->io.regshift = regshift ? be32_to_cpup(regshift) : 0; | |
dba9b4f6 | 2737 | |
61c7a080 | 2738 | info->irq = irq_of_parse_and_map(dev->dev.of_node, 0); |
dba9b4f6 CM |
2739 | info->dev = &dev->dev; |
2740 | ||
279fbd0c | 2741 | dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n", |
dba9b4f6 CM |
2742 | info->io.addr_data, info->io.regsize, info->io.regspacing, |
2743 | info->irq); | |
2744 | ||
9de33df4 | 2745 | dev_set_drvdata(&dev->dev, info); |
dba9b4f6 | 2746 | |
d02b3709 CM |
2747 | ret = add_smi(info); |
2748 | if (ret) { | |
7faefea6 | 2749 | kfree(info); |
d02b3709 | 2750 | return ret; |
7faefea6 | 2751 | } |
a1e9c9dd | 2752 | #endif |
7faefea6 | 2753 | return 0; |
dba9b4f6 CM |
2754 | } |
2755 | ||
39af33fc | 2756 | static int ipmi_remove(struct platform_device *dev) |
dba9b4f6 | 2757 | { |
a1e9c9dd | 2758 | #ifdef CONFIG_OF |
9de33df4 | 2759 | cleanup_one_si(dev_get_drvdata(&dev->dev)); |
a1e9c9dd | 2760 | #endif |
dba9b4f6 CM |
2761 | return 0; |
2762 | } | |
2763 | ||
da2ff527 | 2764 | static const struct of_device_id ipmi_match[] = |
dba9b4f6 | 2765 | { |
c305e3d3 CM |
2766 | { .type = "ipmi", .compatible = "ipmi-kcs", |
2767 | .data = (void *)(unsigned long) SI_KCS }, | |
2768 | { .type = "ipmi", .compatible = "ipmi-smic", | |
2769 | .data = (void *)(unsigned long) SI_SMIC }, | |
2770 | { .type = "ipmi", .compatible = "ipmi-bt", | |
2771 | .data = (void *)(unsigned long) SI_BT }, | |
dba9b4f6 CM |
2772 | {}, |
2773 | }; | |
2774 | ||
a1e9c9dd | 2775 | static struct platform_driver ipmi_driver = { |
4018294b | 2776 | .driver = { |
a1e9c9dd | 2777 | .name = DEVICE_NAME, |
4018294b GL |
2778 | .of_match_table = ipmi_match, |
2779 | }, | |
a1e9c9dd | 2780 | .probe = ipmi_probe, |
bcd2982a | 2781 | .remove = ipmi_remove, |
dba9b4f6 | 2782 | }; |
dba9b4f6 | 2783 | |
fdbeb7de TB |
2784 | #ifdef CONFIG_PARISC |
2785 | static int ipmi_parisc_probe(struct parisc_device *dev) | |
2786 | { | |
2787 | struct smi_info *info; | |
dfa19426 | 2788 | int rv; |
fdbeb7de TB |
2789 | |
2790 | info = smi_info_alloc(); | |
2791 | ||
2792 | if (!info) { | |
2793 | dev_err(&dev->dev, | |
2794 | "could not allocate memory for PARISC probe\n"); | |
2795 | return -ENOMEM; | |
2796 | } | |
2797 | ||
2798 | info->si_type = SI_KCS; | |
2799 | info->addr_source = SI_DEVICETREE; | |
2800 | info->io_setup = mem_setup; | |
2801 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2802 | info->io.addr_data = dev->hpa.start; | |
2803 | info->io.regsize = 1; | |
2804 | info->io.regspacing = 1; | |
2805 | info->io.regshift = 0; | |
2806 | info->irq = 0; /* no interrupt */ | |
2807 | info->irq_setup = NULL; | |
2808 | info->dev = &dev->dev; | |
2809 | ||
2810 | dev_dbg(&dev->dev, "addr 0x%lx\n", info->io.addr_data); | |
2811 | ||
2812 | dev_set_drvdata(&dev->dev, info); | |
2813 | ||
d02b3709 CM |
2814 | rv = add_smi(info); |
2815 | if (rv) { | |
fdbeb7de | 2816 | kfree(info); |
d02b3709 | 2817 | return rv; |
fdbeb7de TB |
2818 | } |
2819 | ||
2820 | return 0; | |
2821 | } | |
2822 | ||
2823 | static int ipmi_parisc_remove(struct parisc_device *dev) | |
2824 | { | |
2825 | cleanup_one_si(dev_get_drvdata(&dev->dev)); | |
2826 | return 0; | |
2827 | } | |
2828 | ||
2829 | static struct parisc_device_id ipmi_parisc_tbl[] = { | |
2830 | { HPHW_MC, HVERSION_REV_ANY_ID, 0x004, 0xC0 }, | |
2831 | { 0, } | |
2832 | }; | |
2833 | ||
2834 | static struct parisc_driver ipmi_parisc_driver = { | |
2835 | .name = "ipmi", | |
2836 | .id_table = ipmi_parisc_tbl, | |
2837 | .probe = ipmi_parisc_probe, | |
2838 | .remove = ipmi_parisc_remove, | |
2839 | }; | |
2840 | #endif /* CONFIG_PARISC */ | |
2841 | ||
40112ae7 | 2842 | static int wait_for_msg_done(struct smi_info *smi_info) |
1da177e4 | 2843 | { |
50c812b2 | 2844 | enum si_sm_result smi_result; |
1da177e4 LT |
2845 | |
2846 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 2847 | for (;;) { |
c3e7e791 CM |
2848 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2849 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2850 | schedule_timeout_uninterruptible(1); |
1da177e4 | 2851 | smi_result = smi_info->handlers->event( |
e21404dc | 2852 | smi_info->si_sm, jiffies_to_usecs(1)); |
c305e3d3 | 2853 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
2854 | smi_result = smi_info->handlers->event( |
2855 | smi_info->si_sm, 0); | |
c305e3d3 | 2856 | } else |
1da177e4 LT |
2857 | break; |
2858 | } | |
40112ae7 | 2859 | if (smi_result == SI_SM_HOSED) |
c305e3d3 CM |
2860 | /* |
2861 | * We couldn't get the state machine to run, so whatever's at | |
2862 | * the port is probably not an IPMI SMI interface. | |
2863 | */ | |
40112ae7 CM |
2864 | return -ENODEV; |
2865 | ||
2866 | return 0; | |
2867 | } | |
2868 | ||
2869 | static int try_get_dev_id(struct smi_info *smi_info) | |
2870 | { | |
2871 | unsigned char msg[2]; | |
2872 | unsigned char *resp; | |
2873 | unsigned long resp_len; | |
2874 | int rv = 0; | |
2875 | ||
2876 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2877 | if (!resp) | |
2878 | return -ENOMEM; | |
2879 | ||
2880 | /* | |
2881 | * Do a Get Device ID command, since it comes back with some | |
2882 | * useful info. | |
2883 | */ | |
2884 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2885 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2886 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2887 | ||
2888 | rv = wait_for_msg_done(smi_info); | |
2889 | if (rv) | |
1da177e4 | 2890 | goto out; |
1da177e4 | 2891 | |
1da177e4 LT |
2892 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, |
2893 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 2894 | |
d8c98618 CM |
2895 | /* Check and record info from the get device id, in case we need it. */ |
2896 | rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); | |
1da177e4 LT |
2897 | |
2898 | out: | |
2899 | kfree(resp); | |
2900 | return rv; | |
2901 | } | |
2902 | ||
40112ae7 CM |
2903 | static int try_enable_event_buffer(struct smi_info *smi_info) |
2904 | { | |
2905 | unsigned char msg[3]; | |
2906 | unsigned char *resp; | |
2907 | unsigned long resp_len; | |
2908 | int rv = 0; | |
2909 | ||
2910 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2911 | if (!resp) | |
2912 | return -ENOMEM; | |
2913 | ||
2914 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2915 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
2916 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2917 | ||
2918 | rv = wait_for_msg_done(smi_info); | |
2919 | if (rv) { | |
279fbd0c MS |
2920 | printk(KERN_WARNING PFX "Error getting response from get" |
2921 | " global enables command, the event buffer is not" | |
40112ae7 CM |
2922 | " enabled.\n"); |
2923 | goto out; | |
2924 | } | |
2925 | ||
2926 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2927 | resp, IPMI_MAX_MSG_LENGTH); | |
2928 | ||
2929 | if (resp_len < 4 || | |
2930 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2931 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
2932 | resp[2] != 0) { | |
279fbd0c MS |
2933 | printk(KERN_WARNING PFX "Invalid return from get global" |
2934 | " enables command, cannot enable the event buffer.\n"); | |
40112ae7 CM |
2935 | rv = -EINVAL; |
2936 | goto out; | |
2937 | } | |
2938 | ||
d9b7e4f7 | 2939 | if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) { |
40112ae7 | 2940 | /* buffer is already enabled, nothing to do. */ |
d9b7e4f7 | 2941 | smi_info->supports_event_msg_buff = true; |
40112ae7 | 2942 | goto out; |
d9b7e4f7 | 2943 | } |
40112ae7 CM |
2944 | |
2945 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2946 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
2947 | msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; | |
2948 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
2949 | ||
2950 | rv = wait_for_msg_done(smi_info); | |
2951 | if (rv) { | |
279fbd0c MS |
2952 | printk(KERN_WARNING PFX "Error getting response from set" |
2953 | " global, enables command, the event buffer is not" | |
40112ae7 CM |
2954 | " enabled.\n"); |
2955 | goto out; | |
2956 | } | |
2957 | ||
2958 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2959 | resp, IPMI_MAX_MSG_LENGTH); | |
2960 | ||
2961 | if (resp_len < 3 || | |
2962 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2963 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
279fbd0c MS |
2964 | printk(KERN_WARNING PFX "Invalid return from get global," |
2965 | "enables command, not enable the event buffer.\n"); | |
40112ae7 CM |
2966 | rv = -EINVAL; |
2967 | goto out; | |
2968 | } | |
2969 | ||
2970 | if (resp[2] != 0) | |
2971 | /* | |
2972 | * An error when setting the event buffer bit means | |
2973 | * that the event buffer is not supported. | |
2974 | */ | |
2975 | rv = -ENOENT; | |
d9b7e4f7 CM |
2976 | else |
2977 | smi_info->supports_event_msg_buff = true; | |
2978 | ||
40112ae7 CM |
2979 | out: |
2980 | kfree(resp); | |
2981 | return rv; | |
2982 | } | |
2983 | ||
07412736 | 2984 | static int smi_type_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2985 | { |
07412736 | 2986 | struct smi_info *smi = m->private; |
1da177e4 | 2987 | |
d6c5dc18 JP |
2988 | seq_printf(m, "%s\n", si_to_str[smi->si_type]); |
2989 | ||
2990 | return seq_has_overflowed(m); | |
1da177e4 LT |
2991 | } |
2992 | ||
07412736 | 2993 | static int smi_type_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2994 | { |
d9dda78b | 2995 | return single_open(file, smi_type_proc_show, PDE_DATA(inode)); |
07412736 AD |
2996 | } |
2997 | ||
2998 | static const struct file_operations smi_type_proc_ops = { | |
2999 | .open = smi_type_proc_open, | |
3000 | .read = seq_read, | |
3001 | .llseek = seq_lseek, | |
3002 | .release = single_release, | |
3003 | }; | |
3004 | ||
3005 | static int smi_si_stats_proc_show(struct seq_file *m, void *v) | |
3006 | { | |
3007 | struct smi_info *smi = m->private; | |
1da177e4 | 3008 | |
07412736 | 3009 | seq_printf(m, "interrupts_enabled: %d\n", |
b0defcdb | 3010 | smi->irq && !smi->interrupt_disabled); |
07412736 | 3011 | seq_printf(m, "short_timeouts: %u\n", |
64959e2d | 3012 | smi_get_stat(smi, short_timeouts)); |
07412736 | 3013 | seq_printf(m, "long_timeouts: %u\n", |
64959e2d | 3014 | smi_get_stat(smi, long_timeouts)); |
07412736 | 3015 | seq_printf(m, "idles: %u\n", |
64959e2d | 3016 | smi_get_stat(smi, idles)); |
07412736 | 3017 | seq_printf(m, "interrupts: %u\n", |
64959e2d | 3018 | smi_get_stat(smi, interrupts)); |
07412736 | 3019 | seq_printf(m, "attentions: %u\n", |
64959e2d | 3020 | smi_get_stat(smi, attentions)); |
07412736 | 3021 | seq_printf(m, "flag_fetches: %u\n", |
64959e2d | 3022 | smi_get_stat(smi, flag_fetches)); |
07412736 | 3023 | seq_printf(m, "hosed_count: %u\n", |
64959e2d | 3024 | smi_get_stat(smi, hosed_count)); |
07412736 | 3025 | seq_printf(m, "complete_transactions: %u\n", |
64959e2d | 3026 | smi_get_stat(smi, complete_transactions)); |
07412736 | 3027 | seq_printf(m, "events: %u\n", |
64959e2d | 3028 | smi_get_stat(smi, events)); |
07412736 | 3029 | seq_printf(m, "watchdog_pretimeouts: %u\n", |
64959e2d | 3030 | smi_get_stat(smi, watchdog_pretimeouts)); |
07412736 | 3031 | seq_printf(m, "incoming_messages: %u\n", |
64959e2d | 3032 | smi_get_stat(smi, incoming_messages)); |
07412736 AD |
3033 | return 0; |
3034 | } | |
1da177e4 | 3035 | |
07412736 AD |
3036 | static int smi_si_stats_proc_open(struct inode *inode, struct file *file) |
3037 | { | |
d9dda78b | 3038 | return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode)); |
b361e27b CM |
3039 | } |
3040 | ||
07412736 AD |
3041 | static const struct file_operations smi_si_stats_proc_ops = { |
3042 | .open = smi_si_stats_proc_open, | |
3043 | .read = seq_read, | |
3044 | .llseek = seq_lseek, | |
3045 | .release = single_release, | |
3046 | }; | |
3047 | ||
3048 | static int smi_params_proc_show(struct seq_file *m, void *v) | |
b361e27b | 3049 | { |
07412736 | 3050 | struct smi_info *smi = m->private; |
b361e27b | 3051 | |
d6c5dc18 JP |
3052 | seq_printf(m, |
3053 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", | |
3054 | si_to_str[smi->si_type], | |
3055 | addr_space_to_str[smi->io.addr_type], | |
3056 | smi->io.addr_data, | |
3057 | smi->io.regspacing, | |
3058 | smi->io.regsize, | |
3059 | smi->io.regshift, | |
3060 | smi->irq, | |
3061 | smi->slave_addr); | |
3062 | ||
3063 | return seq_has_overflowed(m); | |
1da177e4 LT |
3064 | } |
3065 | ||
07412736 AD |
3066 | static int smi_params_proc_open(struct inode *inode, struct file *file) |
3067 | { | |
d9dda78b | 3068 | return single_open(file, smi_params_proc_show, PDE_DATA(inode)); |
07412736 AD |
3069 | } |
3070 | ||
3071 | static const struct file_operations smi_params_proc_ops = { | |
3072 | .open = smi_params_proc_open, | |
3073 | .read = seq_read, | |
3074 | .llseek = seq_lseek, | |
3075 | .release = single_release, | |
3076 | }; | |
3077 | ||
3ae0e0f9 CM |
3078 | /* |
3079 | * oem_data_avail_to_receive_msg_avail | |
3080 | * @info - smi_info structure with msg_flags set | |
3081 | * | |
3082 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
3083 | * Returns 1 indicating need to re-run handle_flags(). | |
3084 | */ | |
3085 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
3086 | { | |
e8b33617 | 3087 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 3088 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
3089 | return 1; |
3090 | } | |
3091 | ||
3092 | /* | |
3093 | * setup_dell_poweredge_oem_data_handler | |
3094 | * @info - smi_info.device_id must be populated | |
3095 | * | |
3096 | * Systems that match, but have firmware version < 1.40 may assert | |
3097 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
3098 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
3099 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
3100 | * as RECEIVE_MSG_AVAIL instead. | |
3101 | * | |
3102 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
3103 | * assert the OEM[012] bits, and if it did, the driver would have to | |
3104 | * change to handle that properly, we don't actually check for the | |
3105 | * firmware version. | |
3106 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
3107 | * Device Revision = 0x80 | |
3108 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
3109 | * Firmware Revision2 = 0x40 BCD encoded | |
3110 | * IPMI Version = 0x51 IPMI 1.5 | |
3111 | * Manufacturer ID = A2 02 00 Dell IANA | |
3112 | * | |
d5a2b89a CM |
3113 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
3114 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
3115 | * | |
3ae0e0f9 CM |
3116 | */ |
3117 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
3118 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
3119 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 3120 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
3121 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
3122 | { | |
3123 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3124 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
3125 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
3126 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 3127 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
3128 | smi_info->oem_data_avail_handler = |
3129 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
3130 | } else if (ipmi_version_major(id) < 1 || |
3131 | (ipmi_version_major(id) == 1 && | |
3132 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
3133 | smi_info->oem_data_avail_handler = |
3134 | oem_data_avail_to_receive_msg_avail; | |
3135 | } | |
3ae0e0f9 CM |
3136 | } |
3137 | } | |
3138 | ||
ea94027b CM |
3139 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
3140 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
3141 | { | |
3142 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
3143 | ||
25985edc | 3144 | /* Make it a response */ |
ea94027b CM |
3145 | msg->rsp[0] = msg->data[0] | 4; |
3146 | msg->rsp[1] = msg->data[1]; | |
3147 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
3148 | msg->rsp_size = 3; | |
3149 | smi_info->curr_msg = NULL; | |
3150 | deliver_recv_msg(smi_info, msg); | |
3151 | } | |
3152 | ||
3153 | /* | |
3154 | * dell_poweredge_bt_xaction_handler | |
3155 | * @info - smi_info.device_id must be populated | |
3156 | * | |
3157 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
3158 | * not respond to a Get SDR command if the length of the data | |
3159 | * requested is exactly 0x3A, which leads to command timeouts and no | |
3160 | * data returned. This intercepts such commands, and causes userspace | |
3161 | * callers to try again with a different-sized buffer, which succeeds. | |
3162 | */ | |
3163 | ||
3164 | #define STORAGE_NETFN 0x0A | |
3165 | #define STORAGE_CMD_GET_SDR 0x23 | |
3166 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
3167 | unsigned long unused, | |
3168 | void *in) | |
3169 | { | |
3170 | struct smi_info *smi_info = in; | |
3171 | unsigned char *data = smi_info->curr_msg->data; | |
3172 | unsigned int size = smi_info->curr_msg->data_size; | |
3173 | if (size >= 8 && | |
3174 | (data[0]>>2) == STORAGE_NETFN && | |
3175 | data[1] == STORAGE_CMD_GET_SDR && | |
3176 | data[7] == 0x3A) { | |
3177 | return_hosed_msg_badsize(smi_info); | |
3178 | return NOTIFY_STOP; | |
3179 | } | |
3180 | return NOTIFY_DONE; | |
3181 | } | |
3182 | ||
3183 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
3184 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
3185 | }; | |
3186 | ||
3187 | /* | |
3188 | * setup_dell_poweredge_bt_xaction_handler | |
3189 | * @info - smi_info.device_id must be filled in already | |
3190 | * | |
3191 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
3192 | * when we know what function to use there. | |
3193 | */ | |
3194 | static void | |
3195 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
3196 | { | |
3197 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3198 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
3199 | smi_info->si_type == SI_BT) |
3200 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
3201 | } | |
3202 | ||
3ae0e0f9 CM |
3203 | /* |
3204 | * setup_oem_data_handler | |
3205 | * @info - smi_info.device_id must be filled in already | |
3206 | * | |
3207 | * Fills in smi_info.device_id.oem_data_available_handler | |
3208 | * when we know what function to use there. | |
3209 | */ | |
3210 | ||
3211 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
3212 | { | |
3213 | setup_dell_poweredge_oem_data_handler(smi_info); | |
3214 | } | |
3215 | ||
ea94027b CM |
3216 | static void setup_xaction_handlers(struct smi_info *smi_info) |
3217 | { | |
3218 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
3219 | } | |
3220 | ||
a9a2c44f CM |
3221 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
3222 | { | |
b874b985 CM |
3223 | if (smi_info->thread != NULL) |
3224 | kthread_stop(smi_info->thread); | |
3225 | if (smi_info->timer_running) | |
453823ba | 3226 | del_timer_sync(&smi_info->si_timer); |
a9a2c44f CM |
3227 | } |
3228 | ||
0bbed20e | 3229 | static struct ipmi_default_vals |
b0defcdb CM |
3230 | { |
3231 | int type; | |
3232 | int port; | |
7420884c | 3233 | } ipmi_defaults[] = |
b0defcdb CM |
3234 | { |
3235 | { .type = SI_KCS, .port = 0xca2 }, | |
3236 | { .type = SI_SMIC, .port = 0xca9 }, | |
3237 | { .type = SI_BT, .port = 0xe4 }, | |
3238 | { .port = 0 } | |
3239 | }; | |
3240 | ||
2223cbec | 3241 | static void default_find_bmc(void) |
b0defcdb CM |
3242 | { |
3243 | struct smi_info *info; | |
3244 | int i; | |
3245 | ||
3246 | for (i = 0; ; i++) { | |
3247 | if (!ipmi_defaults[i].port) | |
3248 | break; | |
68e1ee62 | 3249 | #ifdef CONFIG_PPC |
4ff31d77 CK |
3250 | if (check_legacy_ioport(ipmi_defaults[i].port)) |
3251 | continue; | |
3252 | #endif | |
de5e2ddf | 3253 | info = smi_info_alloc(); |
a09f4855 AM |
3254 | if (!info) |
3255 | return; | |
4ff31d77 | 3256 | |
5fedc4a2 | 3257 | info->addr_source = SI_DEFAULT; |
b0defcdb CM |
3258 | |
3259 | info->si_type = ipmi_defaults[i].type; | |
3260 | info->io_setup = port_setup; | |
3261 | info->io.addr_data = ipmi_defaults[i].port; | |
3262 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
3263 | ||
3264 | info->io.addr = NULL; | |
3265 | info->io.regspacing = DEFAULT_REGSPACING; | |
3266 | info->io.regsize = DEFAULT_REGSPACING; | |
3267 | info->io.regshift = 0; | |
3268 | ||
2407d77a MG |
3269 | if (add_smi(info) == 0) { |
3270 | if ((try_smi_init(info)) == 0) { | |
3271 | /* Found one... */ | |
279fbd0c | 3272 | printk(KERN_INFO PFX "Found default %s" |
2407d77a MG |
3273 | " state machine at %s address 0x%lx\n", |
3274 | si_to_str[info->si_type], | |
3275 | addr_space_to_str[info->io.addr_type], | |
3276 | info->io.addr_data); | |
3277 | } else | |
3278 | cleanup_one_si(info); | |
7faefea6 YL |
3279 | } else { |
3280 | kfree(info); | |
b0defcdb CM |
3281 | } |
3282 | } | |
3283 | } | |
3284 | ||
3285 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 3286 | { |
b0defcdb | 3287 | struct smi_info *e; |
1da177e4 | 3288 | |
b0defcdb CM |
3289 | list_for_each_entry(e, &smi_infos, link) { |
3290 | if (e->io.addr_type != info->io.addr_type) | |
3291 | continue; | |
3292 | if (e->io.addr_data == info->io.addr_data) | |
3293 | return 0; | |
3294 | } | |
1da177e4 | 3295 | |
b0defcdb CM |
3296 | return 1; |
3297 | } | |
1da177e4 | 3298 | |
2407d77a | 3299 | static int add_smi(struct smi_info *new_smi) |
b0defcdb | 3300 | { |
2407d77a | 3301 | int rv = 0; |
b0defcdb | 3302 | |
279fbd0c | 3303 | printk(KERN_INFO PFX "Adding %s-specified %s state machine", |
7e50387b CM |
3304 | ipmi_addr_src_to_str(new_smi->addr_source), |
3305 | si_to_str[new_smi->si_type]); | |
d6dfd131 | 3306 | mutex_lock(&smi_infos_lock); |
b0defcdb | 3307 | if (!is_new_interface(new_smi)) { |
7bb671e3 | 3308 | printk(KERN_CONT " duplicate interface\n"); |
b0defcdb CM |
3309 | rv = -EBUSY; |
3310 | goto out_err; | |
3311 | } | |
1da177e4 | 3312 | |
2407d77a MG |
3313 | printk(KERN_CONT "\n"); |
3314 | ||
1da177e4 LT |
3315 | /* So we know not to free it unless we have allocated one. */ |
3316 | new_smi->intf = NULL; | |
3317 | new_smi->si_sm = NULL; | |
3318 | new_smi->handlers = NULL; | |
3319 | ||
2407d77a MG |
3320 | list_add_tail(&new_smi->link, &smi_infos); |
3321 | ||
3322 | out_err: | |
3323 | mutex_unlock(&smi_infos_lock); | |
3324 | return rv; | |
3325 | } | |
3326 | ||
3327 | static int try_smi_init(struct smi_info *new_smi) | |
3328 | { | |
3329 | int rv = 0; | |
3330 | int i; | |
3331 | ||
279fbd0c | 3332 | printk(KERN_INFO PFX "Trying %s-specified %s state" |
2407d77a MG |
3333 | " machine at %s address 0x%lx, slave address 0x%x," |
3334 | " irq %d\n", | |
7e50387b | 3335 | ipmi_addr_src_to_str(new_smi->addr_source), |
2407d77a MG |
3336 | si_to_str[new_smi->si_type], |
3337 | addr_space_to_str[new_smi->io.addr_type], | |
3338 | new_smi->io.addr_data, | |
3339 | new_smi->slave_addr, new_smi->irq); | |
3340 | ||
b0defcdb CM |
3341 | switch (new_smi->si_type) { |
3342 | case SI_KCS: | |
1da177e4 | 3343 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
3344 | break; |
3345 | ||
3346 | case SI_SMIC: | |
1da177e4 | 3347 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
3348 | break; |
3349 | ||
3350 | case SI_BT: | |
1da177e4 | 3351 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
3352 | break; |
3353 | ||
3354 | default: | |
1da177e4 LT |
3355 | /* No support for anything else yet. */ |
3356 | rv = -EIO; | |
3357 | goto out_err; | |
3358 | } | |
3359 | ||
3360 | /* Allocate the state machine's data and initialize it. */ | |
3361 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 3362 | if (!new_smi->si_sm) { |
279fbd0c MS |
3363 | printk(KERN_ERR PFX |
3364 | "Could not allocate state machine memory\n"); | |
1da177e4 LT |
3365 | rv = -ENOMEM; |
3366 | goto out_err; | |
3367 | } | |
3368 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
3369 | &new_smi->io); | |
3370 | ||
3371 | /* Now that we know the I/O size, we can set up the I/O. */ | |
3372 | rv = new_smi->io_setup(new_smi); | |
3373 | if (rv) { | |
279fbd0c | 3374 | printk(KERN_ERR PFX "Could not set up I/O space\n"); |
1da177e4 LT |
3375 | goto out_err; |
3376 | } | |
3377 | ||
1da177e4 LT |
3378 | /* Do low-level detection first. */ |
3379 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb | 3380 | if (new_smi->addr_source) |
279fbd0c | 3381 | printk(KERN_INFO PFX "Interface detection failed\n"); |
1da177e4 LT |
3382 | rv = -ENODEV; |
3383 | goto out_err; | |
3384 | } | |
3385 | ||
c305e3d3 CM |
3386 | /* |
3387 | * Attempt a get device id command. If it fails, we probably | |
3388 | * don't have a BMC here. | |
3389 | */ | |
1da177e4 | 3390 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
3391 | if (rv) { |
3392 | if (new_smi->addr_source) | |
279fbd0c | 3393 | printk(KERN_INFO PFX "There appears to be no BMC" |
b0defcdb | 3394 | " at this location\n"); |
1da177e4 | 3395 | goto out_err; |
b0defcdb | 3396 | } |
1da177e4 | 3397 | |
3ae0e0f9 | 3398 | setup_oem_data_handler(new_smi); |
ea94027b | 3399 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 3400 | |
b874b985 | 3401 | new_smi->waiting_msg = NULL; |
1da177e4 LT |
3402 | new_smi->curr_msg = NULL; |
3403 | atomic_set(&new_smi->req_events, 0); | |
7aefac26 | 3404 | new_smi->run_to_completion = false; |
64959e2d CM |
3405 | for (i = 0; i < SI_NUM_STATS; i++) |
3406 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 | 3407 | |
7aefac26 | 3408 | new_smi->interrupt_disabled = true; |
89986496 | 3409 | atomic_set(&new_smi->need_watch, 0); |
b0defcdb CM |
3410 | new_smi->intf_num = smi_num; |
3411 | smi_num++; | |
1da177e4 | 3412 | |
40112ae7 CM |
3413 | rv = try_enable_event_buffer(new_smi); |
3414 | if (rv == 0) | |
7aefac26 | 3415 | new_smi->has_event_buffer = true; |
40112ae7 | 3416 | |
c305e3d3 CM |
3417 | /* |
3418 | * Start clearing the flags before we enable interrupts or the | |
3419 | * timer to avoid racing with the timer. | |
3420 | */ | |
1da177e4 | 3421 | start_clear_flags(new_smi); |
d9b7e4f7 CM |
3422 | |
3423 | /* | |
3424 | * IRQ is defined to be set when non-zero. req_events will | |
3425 | * cause a global flags check that will enable interrupts. | |
3426 | */ | |
3427 | if (new_smi->irq) { | |
3428 | new_smi->interrupt_disabled = false; | |
3429 | atomic_set(&new_smi->req_events, 1); | |
3430 | } | |
1da177e4 | 3431 | |
50c812b2 | 3432 | if (!new_smi->dev) { |
c305e3d3 CM |
3433 | /* |
3434 | * If we don't already have a device from something | |
3435 | * else (like PCI), then register a new one. | |
3436 | */ | |
50c812b2 CM |
3437 | new_smi->pdev = platform_device_alloc("ipmi_si", |
3438 | new_smi->intf_num); | |
8b32b5d0 | 3439 | if (!new_smi->pdev) { |
279fbd0c MS |
3440 | printk(KERN_ERR PFX |
3441 | "Unable to allocate platform device\n"); | |
453823ba | 3442 | goto out_err; |
50c812b2 CM |
3443 | } |
3444 | new_smi->dev = &new_smi->pdev->dev; | |
fe2d5ffc | 3445 | new_smi->dev->driver = &ipmi_driver.driver; |
50c812b2 | 3446 | |
b48f5457 | 3447 | rv = platform_device_add(new_smi->pdev); |
50c812b2 | 3448 | if (rv) { |
279fbd0c MS |
3449 | printk(KERN_ERR PFX |
3450 | "Unable to register system interface device:" | |
50c812b2 CM |
3451 | " %d\n", |
3452 | rv); | |
453823ba | 3453 | goto out_err; |
50c812b2 | 3454 | } |
7aefac26 | 3455 | new_smi->dev_registered = true; |
50c812b2 CM |
3456 | } |
3457 | ||
1da177e4 LT |
3458 | rv = ipmi_register_smi(&handlers, |
3459 | new_smi, | |
50c812b2 CM |
3460 | &new_smi->device_id, |
3461 | new_smi->dev, | |
453823ba | 3462 | new_smi->slave_addr); |
1da177e4 | 3463 | if (rv) { |
279fbd0c MS |
3464 | dev_err(new_smi->dev, "Unable to register device: error %d\n", |
3465 | rv); | |
1da177e4 LT |
3466 | goto out_err_stop_timer; |
3467 | } | |
3468 | ||
3469 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
07412736 | 3470 | &smi_type_proc_ops, |
99b76233 | 3471 | new_smi); |
1da177e4 | 3472 | if (rv) { |
279fbd0c | 3473 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3474 | goto out_err_stop_timer; |
3475 | } | |
3476 | ||
3477 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
07412736 | 3478 | &smi_si_stats_proc_ops, |
99b76233 | 3479 | new_smi); |
1da177e4 | 3480 | if (rv) { |
279fbd0c | 3481 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3482 | goto out_err_stop_timer; |
3483 | } | |
3484 | ||
b361e27b | 3485 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
07412736 | 3486 | &smi_params_proc_ops, |
99b76233 | 3487 | new_smi); |
b361e27b | 3488 | if (rv) { |
279fbd0c | 3489 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
b361e27b CM |
3490 | goto out_err_stop_timer; |
3491 | } | |
3492 | ||
279fbd0c MS |
3493 | dev_info(new_smi->dev, "IPMI %s interface initialized\n", |
3494 | si_to_str[new_smi->si_type]); | |
1da177e4 LT |
3495 | |
3496 | return 0; | |
3497 | ||
3498 | out_err_stop_timer: | |
a9a2c44f | 3499 | wait_for_timer_and_thread(new_smi); |
1da177e4 LT |
3500 | |
3501 | out_err: | |
7aefac26 | 3502 | new_smi->interrupt_disabled = true; |
2407d77a MG |
3503 | |
3504 | if (new_smi->intf) { | |
b874b985 | 3505 | ipmi_smi_t intf = new_smi->intf; |
2407d77a | 3506 | new_smi->intf = NULL; |
b874b985 | 3507 | ipmi_unregister_smi(intf); |
2407d77a | 3508 | } |
1da177e4 | 3509 | |
2407d77a | 3510 | if (new_smi->irq_cleanup) { |
b0defcdb | 3511 | new_smi->irq_cleanup(new_smi); |
2407d77a MG |
3512 | new_smi->irq_cleanup = NULL; |
3513 | } | |
1da177e4 | 3514 | |
c305e3d3 CM |
3515 | /* |
3516 | * Wait until we know that we are out of any interrupt | |
3517 | * handlers might have been running before we freed the | |
3518 | * interrupt. | |
3519 | */ | |
fbd568a3 | 3520 | synchronize_sched(); |
1da177e4 LT |
3521 | |
3522 | if (new_smi->si_sm) { | |
3523 | if (new_smi->handlers) | |
3524 | new_smi->handlers->cleanup(new_smi->si_sm); | |
3525 | kfree(new_smi->si_sm); | |
2407d77a | 3526 | new_smi->si_sm = NULL; |
1da177e4 | 3527 | } |
2407d77a | 3528 | if (new_smi->addr_source_cleanup) { |
b0defcdb | 3529 | new_smi->addr_source_cleanup(new_smi); |
2407d77a MG |
3530 | new_smi->addr_source_cleanup = NULL; |
3531 | } | |
3532 | if (new_smi->io_cleanup) { | |
7767e126 | 3533 | new_smi->io_cleanup(new_smi); |
2407d77a MG |
3534 | new_smi->io_cleanup = NULL; |
3535 | } | |
1da177e4 | 3536 | |
2407d77a | 3537 | if (new_smi->dev_registered) { |
50c812b2 | 3538 | platform_device_unregister(new_smi->pdev); |
7aefac26 | 3539 | new_smi->dev_registered = false; |
2407d77a | 3540 | } |
b0defcdb | 3541 | |
1da177e4 LT |
3542 | return rv; |
3543 | } | |
3544 | ||
2223cbec | 3545 | static int init_ipmi_si(void) |
1da177e4 | 3546 | { |
1da177e4 LT |
3547 | int i; |
3548 | char *str; | |
50c812b2 | 3549 | int rv; |
2407d77a | 3550 | struct smi_info *e; |
06ee4594 | 3551 | enum ipmi_addr_src type = SI_INVALID; |
1da177e4 LT |
3552 | |
3553 | if (initialized) | |
3554 | return 0; | |
3555 | initialized = 1; | |
3556 | ||
f2afae46 CM |
3557 | if (si_tryplatform) { |
3558 | rv = platform_driver_register(&ipmi_driver); | |
3559 | if (rv) { | |
3560 | printk(KERN_ERR PFX "Unable to register " | |
3561 | "driver: %d\n", rv); | |
3562 | return rv; | |
3563 | } | |
50c812b2 CM |
3564 | } |
3565 | ||
1da177e4 LT |
3566 | /* Parse out the si_type string into its components. */ |
3567 | str = si_type_str; | |
3568 | if (*str != '\0') { | |
e8b33617 | 3569 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
3570 | si_type[i] = str; |
3571 | str = strchr(str, ','); | |
3572 | if (str) { | |
3573 | *str = '\0'; | |
3574 | str++; | |
3575 | } else { | |
3576 | break; | |
3577 | } | |
3578 | } | |
3579 | } | |
3580 | ||
1fdd75bd | 3581 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 3582 | |
d8cc5267 | 3583 | /* If the user gave us a device, they presumably want us to use it */ |
a1e9c9dd | 3584 | if (!hardcode_find_bmc()) |
d8cc5267 | 3585 | return 0; |
d8cc5267 | 3586 | |
b0defcdb | 3587 | #ifdef CONFIG_PCI |
f2afae46 CM |
3588 | if (si_trypci) { |
3589 | rv = pci_register_driver(&ipmi_pci_driver); | |
3590 | if (rv) | |
3591 | printk(KERN_ERR PFX "Unable to register " | |
3592 | "PCI driver: %d\n", rv); | |
3593 | else | |
7aefac26 | 3594 | pci_registered = true; |
f2afae46 | 3595 | } |
b0defcdb CM |
3596 | #endif |
3597 | ||
754d4531 | 3598 | #ifdef CONFIG_ACPI |
d941aeae CM |
3599 | if (si_tryacpi) { |
3600 | pnp_register_driver(&ipmi_pnp_driver); | |
7aefac26 | 3601 | pnp_registered = true; |
d941aeae | 3602 | } |
754d4531 MG |
3603 | #endif |
3604 | ||
3605 | #ifdef CONFIG_DMI | |
d941aeae CM |
3606 | if (si_trydmi) |
3607 | dmi_find_bmc(); | |
754d4531 MG |
3608 | #endif |
3609 | ||
3610 | #ifdef CONFIG_ACPI | |
d941aeae CM |
3611 | if (si_tryacpi) |
3612 | spmi_find_bmc(); | |
754d4531 MG |
3613 | #endif |
3614 | ||
fdbeb7de TB |
3615 | #ifdef CONFIG_PARISC |
3616 | register_parisc_driver(&ipmi_parisc_driver); | |
7aefac26 | 3617 | parisc_registered = true; |
fdbeb7de TB |
3618 | /* poking PC IO addresses will crash machine, don't do it */ |
3619 | si_trydefaults = 0; | |
3620 | #endif | |
3621 | ||
06ee4594 MG |
3622 | /* We prefer devices with interrupts, but in the case of a machine |
3623 | with multiple BMCs we assume that there will be several instances | |
3624 | of a given type so if we succeed in registering a type then also | |
3625 | try to register everything else of the same type */ | |
d8cc5267 | 3626 | |
2407d77a MG |
3627 | mutex_lock(&smi_infos_lock); |
3628 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 MG |
3629 | /* Try to register a device if it has an IRQ and we either |
3630 | haven't successfully registered a device yet or this | |
3631 | device has the same type as one we successfully registered */ | |
3632 | if (e->irq && (!type || e->addr_source == type)) { | |
d8cc5267 | 3633 | if (!try_smi_init(e)) { |
06ee4594 | 3634 | type = e->addr_source; |
d8cc5267 MG |
3635 | } |
3636 | } | |
3637 | } | |
3638 | ||
06ee4594 MG |
3639 | /* type will only have been set if we successfully registered an si */ |
3640 | if (type) { | |
3641 | mutex_unlock(&smi_infos_lock); | |
3642 | return 0; | |
3643 | } | |
3644 | ||
d8cc5267 MG |
3645 | /* Fall back to the preferred device */ |
3646 | ||
3647 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 | 3648 | if (!e->irq && (!type || e->addr_source == type)) { |
d8cc5267 | 3649 | if (!try_smi_init(e)) { |
06ee4594 | 3650 | type = e->addr_source; |
d8cc5267 MG |
3651 | } |
3652 | } | |
2407d77a MG |
3653 | } |
3654 | mutex_unlock(&smi_infos_lock); | |
3655 | ||
06ee4594 MG |
3656 | if (type) |
3657 | return 0; | |
3658 | ||
b0defcdb | 3659 | if (si_trydefaults) { |
d6dfd131 | 3660 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3661 | if (list_empty(&smi_infos)) { |
3662 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 3663 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3664 | default_find_bmc(); |
2407d77a | 3665 | } else |
d6dfd131 | 3666 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3667 | } |
3668 | ||
d6dfd131 | 3669 | mutex_lock(&smi_infos_lock); |
b361e27b | 3670 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 3671 | mutex_unlock(&smi_infos_lock); |
d2478521 | 3672 | cleanup_ipmi_si(); |
279fbd0c MS |
3673 | printk(KERN_WARNING PFX |
3674 | "Unable to find any System Interface(s)\n"); | |
1da177e4 | 3675 | return -ENODEV; |
b0defcdb | 3676 | } else { |
d6dfd131 | 3677 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3678 | return 0; |
1da177e4 | 3679 | } |
1da177e4 LT |
3680 | } |
3681 | module_init(init_ipmi_si); | |
3682 | ||
b361e27b | 3683 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 | 3684 | { |
2407d77a | 3685 | int rv = 0; |
1da177e4 | 3686 | |
b0defcdb | 3687 | if (!to_clean) |
1da177e4 LT |
3688 | return; |
3689 | ||
b874b985 CM |
3690 | if (to_clean->intf) { |
3691 | ipmi_smi_t intf = to_clean->intf; | |
3692 | ||
3693 | to_clean->intf = NULL; | |
3694 | rv = ipmi_unregister_smi(intf); | |
3695 | if (rv) { | |
3696 | pr_err(PFX "Unable to unregister device: errno=%d\n", | |
3697 | rv); | |
3698 | } | |
3699 | } | |
3700 | ||
567eded9 TI |
3701 | if (to_clean->dev) |
3702 | dev_set_drvdata(to_clean->dev, NULL); | |
3703 | ||
b0defcdb CM |
3704 | list_del(&to_clean->link); |
3705 | ||
c305e3d3 | 3706 | /* |
b874b985 CM |
3707 | * Make sure that interrupts, the timer and the thread are |
3708 | * stopped and will not run again. | |
c305e3d3 | 3709 | */ |
b874b985 CM |
3710 | if (to_clean->irq_cleanup) |
3711 | to_clean->irq_cleanup(to_clean); | |
a9a2c44f | 3712 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 3713 | |
c305e3d3 CM |
3714 | /* |
3715 | * Timeouts are stopped, now make sure the interrupts are off | |
b874b985 CM |
3716 | * in the BMC. Note that timers and CPU interrupts are off, |
3717 | * so no need for locks. | |
c305e3d3 | 3718 | */ |
ee6cd5f8 | 3719 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
ee6cd5f8 CM |
3720 | poll(to_clean); |
3721 | schedule_timeout_uninterruptible(1); | |
ee6cd5f8 CM |
3722 | } |
3723 | disable_si_irq(to_clean); | |
e8b33617 | 3724 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 3725 | poll(to_clean); |
da4cd8df | 3726 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
3727 | } |
3728 | ||
2407d77a MG |
3729 | if (to_clean->handlers) |
3730 | to_clean->handlers->cleanup(to_clean->si_sm); | |
1da177e4 LT |
3731 | |
3732 | kfree(to_clean->si_sm); | |
3733 | ||
b0defcdb CM |
3734 | if (to_clean->addr_source_cleanup) |
3735 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
3736 | if (to_clean->io_cleanup) |
3737 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
3738 | |
3739 | if (to_clean->dev_registered) | |
3740 | platform_device_unregister(to_clean->pdev); | |
3741 | ||
3742 | kfree(to_clean); | |
1da177e4 LT |
3743 | } |
3744 | ||
0dcf334c | 3745 | static void cleanup_ipmi_si(void) |
1da177e4 | 3746 | { |
b0defcdb | 3747 | struct smi_info *e, *tmp_e; |
1da177e4 | 3748 | |
b0defcdb | 3749 | if (!initialized) |
1da177e4 LT |
3750 | return; |
3751 | ||
b0defcdb | 3752 | #ifdef CONFIG_PCI |
56480287 MG |
3753 | if (pci_registered) |
3754 | pci_unregister_driver(&ipmi_pci_driver); | |
b0defcdb | 3755 | #endif |
27d0567a | 3756 | #ifdef CONFIG_ACPI |
561f8182 YL |
3757 | if (pnp_registered) |
3758 | pnp_unregister_driver(&ipmi_pnp_driver); | |
9e368fa0 | 3759 | #endif |
fdbeb7de TB |
3760 | #ifdef CONFIG_PARISC |
3761 | if (parisc_registered) | |
3762 | unregister_parisc_driver(&ipmi_parisc_driver); | |
3763 | #endif | |
b0defcdb | 3764 | |
a1e9c9dd | 3765 | platform_driver_unregister(&ipmi_driver); |
dba9b4f6 | 3766 | |
d6dfd131 | 3767 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3768 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
3769 | cleanup_one_si(e); | |
d6dfd131 | 3770 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3771 | } |
3772 | module_exit(cleanup_ipmi_si); | |
3773 | ||
3774 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 3775 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
3776 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
3777 | " system interfaces."); |