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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ipmi_si.c | |
3 | * | |
4 | * The interface to the IPMI driver for the system interfaces (KCS, SMIC, | |
5 | * BT). | |
6 | * | |
7 | * Author: MontaVista Software, Inc. | |
8 | * Corey Minyard <minyard@mvista.com> | |
9 | * source@mvista.com | |
10 | * | |
11 | * Copyright 2002 MontaVista Software Inc. | |
dba9b4f6 | 12 | * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com> |
1da177e4 LT |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify it | |
15 | * under the terms of the GNU General Public License as published by the | |
16 | * Free Software Foundation; either version 2 of the License, or (at your | |
17 | * option) any later version. | |
18 | * | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
21 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
22 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
25 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
26 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
27 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
28 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
29 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License along | |
32 | * with this program; if not, write to the Free Software Foundation, Inc., | |
33 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * This file holds the "policy" for the interface to the SMI state | |
38 | * machine. It does the configuration, handles timers and interrupts, | |
39 | * and drives the real SMI state machine. | |
40 | */ | |
41 | ||
1da177e4 LT |
42 | #include <linux/module.h> |
43 | #include <linux/moduleparam.h> | |
44 | #include <asm/system.h> | |
45 | #include <linux/sched.h> | |
07412736 | 46 | #include <linux/seq_file.h> |
1da177e4 LT |
47 | #include <linux/timer.h> |
48 | #include <linux/errno.h> | |
49 | #include <linux/spinlock.h> | |
50 | #include <linux/slab.h> | |
51 | #include <linux/delay.h> | |
52 | #include <linux/list.h> | |
53 | #include <linux/pci.h> | |
54 | #include <linux/ioport.h> | |
ea94027b | 55 | #include <linux/notifier.h> |
b0defcdb | 56 | #include <linux/mutex.h> |
e9a705a0 | 57 | #include <linux/kthread.h> |
1da177e4 | 58 | #include <asm/irq.h> |
1da177e4 LT |
59 | #include <linux/interrupt.h> |
60 | #include <linux/rcupdate.h> | |
16f4232c | 61 | #include <linux/ipmi.h> |
1da177e4 LT |
62 | #include <linux/ipmi_smi.h> |
63 | #include <asm/io.h> | |
64 | #include "ipmi_si_sm.h" | |
65 | #include <linux/init.h> | |
b224cd3a | 66 | #include <linux/dmi.h> |
b361e27b CM |
67 | #include <linux/string.h> |
68 | #include <linux/ctype.h> | |
9e368fa0 | 69 | #include <linux/pnp.h> |
11c675ce SR |
70 | #include <linux/of_device.h> |
71 | #include <linux/of_platform.h> | |
672d8eaf RH |
72 | #include <linux/of_address.h> |
73 | #include <linux/of_irq.h> | |
dba9b4f6 | 74 | |
b361e27b | 75 | #define PFX "ipmi_si: " |
1da177e4 LT |
76 | |
77 | /* Measure times between events in the driver. */ | |
78 | #undef DEBUG_TIMING | |
79 | ||
80 | /* Call every 10 ms. */ | |
81 | #define SI_TIMEOUT_TIME_USEC 10000 | |
82 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
83 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
84 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
c305e3d3 | 85 | short timeout */ |
1da177e4 LT |
86 | |
87 | enum si_intf_state { | |
88 | SI_NORMAL, | |
89 | SI_GETTING_FLAGS, | |
90 | SI_GETTING_EVENTS, | |
91 | SI_CLEARING_FLAGS, | |
92 | SI_CLEARING_FLAGS_THEN_SET_IRQ, | |
93 | SI_GETTING_MESSAGES, | |
94 | SI_ENABLE_INTERRUPTS1, | |
ee6cd5f8 CM |
95 | SI_ENABLE_INTERRUPTS2, |
96 | SI_DISABLE_INTERRUPTS1, | |
97 | SI_DISABLE_INTERRUPTS2 | |
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 | |
5fedc4a2 MG |
111 | static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI", |
112 | "ACPI", "SMBIOS", "PCI", | |
113 | "device-tree", "default" }; | |
114 | ||
50c812b2 CM |
115 | #define DEVICE_NAME "ipmi_si" |
116 | ||
a1e9c9dd | 117 | static struct platform_driver ipmi_driver; |
64959e2d CM |
118 | |
119 | /* | |
120 | * Indexes into stats[] in smi_info below. | |
121 | */ | |
ba8ff1c6 CM |
122 | enum si_stat_indexes { |
123 | /* | |
124 | * Number of times the driver requested a timer while an operation | |
125 | * was in progress. | |
126 | */ | |
127 | SI_STAT_short_timeouts = 0, | |
128 | ||
129 | /* | |
130 | * Number of times the driver requested a timer while nothing was in | |
131 | * progress. | |
132 | */ | |
133 | SI_STAT_long_timeouts, | |
134 | ||
135 | /* Number of times the interface was idle while being polled. */ | |
136 | SI_STAT_idles, | |
137 | ||
138 | /* Number of interrupts the driver handled. */ | |
139 | SI_STAT_interrupts, | |
140 | ||
141 | /* Number of time the driver got an ATTN from the hardware. */ | |
142 | SI_STAT_attentions, | |
64959e2d | 143 | |
ba8ff1c6 CM |
144 | /* Number of times the driver requested flags from the hardware. */ |
145 | SI_STAT_flag_fetches, | |
146 | ||
147 | /* Number of times the hardware didn't follow the state machine. */ | |
148 | SI_STAT_hosed_count, | |
149 | ||
150 | /* Number of completed messages. */ | |
151 | SI_STAT_complete_transactions, | |
152 | ||
153 | /* Number of IPMI events received from the hardware. */ | |
154 | SI_STAT_events, | |
155 | ||
156 | /* Number of watchdog pretimeouts. */ | |
157 | SI_STAT_watchdog_pretimeouts, | |
158 | ||
159 | /* Number of asyncronous messages received. */ | |
160 | SI_STAT_incoming_messages, | |
161 | ||
162 | ||
163 | /* This *must* remain last, add new values above this. */ | |
164 | SI_NUM_STATS | |
165 | }; | |
64959e2d | 166 | |
c305e3d3 | 167 | struct smi_info { |
a9a2c44f | 168 | int intf_num; |
1da177e4 LT |
169 | ipmi_smi_t intf; |
170 | struct si_sm_data *si_sm; | |
171 | struct si_sm_handlers *handlers; | |
172 | enum si_type si_type; | |
173 | spinlock_t si_lock; | |
174 | spinlock_t msg_lock; | |
175 | struct list_head xmit_msgs; | |
176 | struct list_head hp_xmit_msgs; | |
177 | struct ipmi_smi_msg *curr_msg; | |
178 | enum si_intf_state si_state; | |
179 | ||
c305e3d3 CM |
180 | /* |
181 | * Used to handle the various types of I/O that can occur with | |
182 | * IPMI | |
183 | */ | |
1da177e4 LT |
184 | struct si_sm_io io; |
185 | int (*io_setup)(struct smi_info *info); | |
186 | void (*io_cleanup)(struct smi_info *info); | |
187 | int (*irq_setup)(struct smi_info *info); | |
188 | void (*irq_cleanup)(struct smi_info *info); | |
189 | unsigned int io_size; | |
5fedc4a2 | 190 | enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */ |
b0defcdb CM |
191 | void (*addr_source_cleanup)(struct smi_info *info); |
192 | void *addr_source_data; | |
1da177e4 | 193 | |
c305e3d3 CM |
194 | /* |
195 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
196 | * when handle_flags() needs to be re-run or 0 indicating it | |
197 | * set si_state itself. | |
198 | */ | |
3ae0e0f9 CM |
199 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
200 | ||
c305e3d3 CM |
201 | /* |
202 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
203 | * is set to hold the flags until we are done handling everything | |
204 | * from the flags. | |
205 | */ | |
1da177e4 LT |
206 | #define RECEIVE_MSG_AVAIL 0x01 |
207 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
208 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
209 | #define OEM0_DATA_AVAIL 0x20 |
210 | #define OEM1_DATA_AVAIL 0x40 | |
211 | #define OEM2_DATA_AVAIL 0x80 | |
212 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
213 | OEM1_DATA_AVAIL | \ |
214 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
215 | unsigned char msg_flags; |
216 | ||
40112ae7 CM |
217 | /* Does the BMC have an event buffer? */ |
218 | char has_event_buffer; | |
219 | ||
c305e3d3 CM |
220 | /* |
221 | * If set to true, this will request events the next time the | |
222 | * state machine is idle. | |
223 | */ | |
1da177e4 LT |
224 | atomic_t req_events; |
225 | ||
c305e3d3 CM |
226 | /* |
227 | * If true, run the state machine to completion on every send | |
228 | * call. Generally used after a panic to make sure stuff goes | |
229 | * out. | |
230 | */ | |
1da177e4 LT |
231 | int run_to_completion; |
232 | ||
233 | /* The I/O port of an SI interface. */ | |
234 | int port; | |
235 | ||
c305e3d3 CM |
236 | /* |
237 | * The space between start addresses of the two ports. For | |
238 | * instance, if the first port is 0xca2 and the spacing is 4, then | |
239 | * the second port is 0xca6. | |
240 | */ | |
1da177e4 LT |
241 | unsigned int spacing; |
242 | ||
243 | /* zero if no irq; */ | |
244 | int irq; | |
245 | ||
246 | /* The timer for this si. */ | |
247 | struct timer_list si_timer; | |
248 | ||
249 | /* The time (in jiffies) the last timeout occurred at. */ | |
250 | unsigned long last_timeout_jiffies; | |
251 | ||
252 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 253 | atomic_t stop_operation; |
1da177e4 | 254 | |
c305e3d3 CM |
255 | /* |
256 | * The driver will disable interrupts when it gets into a | |
257 | * situation where it cannot handle messages due to lack of | |
258 | * memory. Once that situation clears up, it will re-enable | |
259 | * interrupts. | |
260 | */ | |
1da177e4 LT |
261 | int interrupt_disabled; |
262 | ||
50c812b2 | 263 | /* From the get device id response... */ |
3ae0e0f9 | 264 | struct ipmi_device_id device_id; |
1da177e4 | 265 | |
50c812b2 CM |
266 | /* Driver model stuff. */ |
267 | struct device *dev; | |
268 | struct platform_device *pdev; | |
269 | ||
c305e3d3 CM |
270 | /* |
271 | * True if we allocated the device, false if it came from | |
272 | * someplace else (like PCI). | |
273 | */ | |
50c812b2 CM |
274 | int dev_registered; |
275 | ||
1da177e4 LT |
276 | /* Slave address, could be reported from DMI. */ |
277 | unsigned char slave_addr; | |
278 | ||
279 | /* Counters and things for the proc filesystem. */ | |
64959e2d | 280 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 281 | |
c305e3d3 | 282 | struct task_struct *thread; |
b0defcdb CM |
283 | |
284 | struct list_head link; | |
16f4232c | 285 | union ipmi_smi_info_union addr_info; |
1da177e4 LT |
286 | }; |
287 | ||
64959e2d CM |
288 | #define smi_inc_stat(smi, stat) \ |
289 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
290 | #define smi_get_stat(smi, stat) \ | |
291 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
292 | ||
a51f4a81 CM |
293 | #define SI_MAX_PARMS 4 |
294 | ||
295 | static int force_kipmid[SI_MAX_PARMS]; | |
296 | static int num_force_kipmid; | |
56480287 MG |
297 | #ifdef CONFIG_PCI |
298 | static int pci_registered; | |
299 | #endif | |
561f8182 YL |
300 | #ifdef CONFIG_ACPI |
301 | static int pnp_registered; | |
302 | #endif | |
a51f4a81 | 303 | |
ae74e823 MW |
304 | static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; |
305 | static int num_max_busy_us; | |
306 | ||
b361e27b CM |
307 | static int unload_when_empty = 1; |
308 | ||
2407d77a | 309 | static int add_smi(struct smi_info *smi); |
b0defcdb | 310 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 311 | static void cleanup_one_si(struct smi_info *to_clean); |
d2478521 | 312 | static void cleanup_ipmi_si(void); |
b0defcdb | 313 | |
e041c683 | 314 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 315 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 316 | { |
e041c683 | 317 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
318 | } |
319 | ||
1da177e4 LT |
320 | static void deliver_recv_msg(struct smi_info *smi_info, |
321 | struct ipmi_smi_msg *msg) | |
322 | { | |
7adf579c CM |
323 | /* Deliver the message to the upper layer. */ |
324 | ipmi_smi_msg_received(smi_info->intf, msg); | |
1da177e4 LT |
325 | } |
326 | ||
4d7cbac7 | 327 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
328 | { |
329 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
330 | ||
4d7cbac7 CM |
331 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
332 | cCode = IPMI_ERR_UNSPECIFIED; | |
333 | /* else use it as is */ | |
334 | ||
25985edc | 335 | /* Make it a response */ |
1da177e4 LT |
336 | msg->rsp[0] = msg->data[0] | 4; |
337 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 338 | msg->rsp[2] = cCode; |
1da177e4 LT |
339 | msg->rsp_size = 3; |
340 | ||
341 | smi_info->curr_msg = NULL; | |
342 | deliver_recv_msg(smi_info, msg); | |
343 | } | |
344 | ||
345 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
346 | { | |
347 | int rv; | |
348 | struct list_head *entry = NULL; | |
349 | #ifdef DEBUG_TIMING | |
350 | struct timeval t; | |
351 | #endif | |
352 | ||
c305e3d3 CM |
353 | /* |
354 | * No need to save flags, we aleady have interrupts off and we | |
355 | * already hold the SMI lock. | |
356 | */ | |
5956dce1 KB |
357 | if (!smi_info->run_to_completion) |
358 | spin_lock(&(smi_info->msg_lock)); | |
1da177e4 LT |
359 | |
360 | /* Pick the high priority queue first. */ | |
b0defcdb | 361 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 362 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 363 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
364 | entry = smi_info->xmit_msgs.next; |
365 | } | |
366 | ||
b0defcdb | 367 | if (!entry) { |
1da177e4 LT |
368 | smi_info->curr_msg = NULL; |
369 | rv = SI_SM_IDLE; | |
370 | } else { | |
371 | int err; | |
372 | ||
373 | list_del(entry); | |
374 | smi_info->curr_msg = list_entry(entry, | |
375 | struct ipmi_smi_msg, | |
376 | link); | |
377 | #ifdef DEBUG_TIMING | |
378 | do_gettimeofday(&t); | |
c305e3d3 | 379 | printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 | 380 | #endif |
e041c683 AS |
381 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
382 | 0, smi_info); | |
ea94027b CM |
383 | if (err & NOTIFY_STOP_MASK) { |
384 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
385 | goto out; | |
386 | } | |
1da177e4 LT |
387 | err = smi_info->handlers->start_transaction( |
388 | smi_info->si_sm, | |
389 | smi_info->curr_msg->data, | |
390 | smi_info->curr_msg->data_size); | |
c305e3d3 | 391 | if (err) |
4d7cbac7 | 392 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
393 | |
394 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
395 | } | |
c305e3d3 | 396 | out: |
5956dce1 KB |
397 | if (!smi_info->run_to_completion) |
398 | spin_unlock(&(smi_info->msg_lock)); | |
1da177e4 LT |
399 | |
400 | return rv; | |
401 | } | |
402 | ||
403 | static void start_enable_irq(struct smi_info *smi_info) | |
404 | { | |
405 | unsigned char msg[2]; | |
406 | ||
c305e3d3 CM |
407 | /* |
408 | * If we are enabling interrupts, we have to tell the | |
409 | * BMC to use them. | |
410 | */ | |
1da177e4 LT |
411 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
412 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
413 | ||
414 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
415 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
416 | } | |
417 | ||
ee6cd5f8 CM |
418 | static void start_disable_irq(struct smi_info *smi_info) |
419 | { | |
420 | unsigned char msg[2]; | |
421 | ||
422 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
423 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
424 | ||
425 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
426 | smi_info->si_state = SI_DISABLE_INTERRUPTS1; | |
427 | } | |
428 | ||
1da177e4 LT |
429 | static void start_clear_flags(struct smi_info *smi_info) |
430 | { | |
431 | unsigned char msg[3]; | |
432 | ||
433 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
434 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
435 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
436 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
437 | ||
438 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
439 | smi_info->si_state = SI_CLEARING_FLAGS; | |
440 | } | |
441 | ||
c305e3d3 CM |
442 | /* |
443 | * When we have a situtaion where we run out of memory and cannot | |
444 | * allocate messages, we just leave them in the BMC and run the system | |
445 | * polled until we can allocate some memory. Once we have some | |
446 | * memory, we will re-enable the interrupt. | |
447 | */ | |
1da177e4 LT |
448 | static inline void disable_si_irq(struct smi_info *smi_info) |
449 | { | |
b0defcdb | 450 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
ee6cd5f8 | 451 | start_disable_irq(smi_info); |
1da177e4 | 452 | smi_info->interrupt_disabled = 1; |
ea4078ca MG |
453 | if (!atomic_read(&smi_info->stop_operation)) |
454 | mod_timer(&smi_info->si_timer, | |
455 | jiffies + SI_TIMEOUT_JIFFIES); | |
1da177e4 LT |
456 | } |
457 | } | |
458 | ||
459 | static inline void enable_si_irq(struct smi_info *smi_info) | |
460 | { | |
461 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
ee6cd5f8 | 462 | start_enable_irq(smi_info); |
1da177e4 LT |
463 | smi_info->interrupt_disabled = 0; |
464 | } | |
465 | } | |
466 | ||
467 | static void handle_flags(struct smi_info *smi_info) | |
468 | { | |
3ae0e0f9 | 469 | retry: |
1da177e4 LT |
470 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
471 | /* Watchdog pre-timeout */ | |
64959e2d | 472 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 LT |
473 | |
474 | start_clear_flags(smi_info); | |
475 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
1da177e4 | 476 | ipmi_smi_watchdog_pretimeout(smi_info->intf); |
1da177e4 LT |
477 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { |
478 | /* Messages available. */ | |
479 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 480 | if (!smi_info->curr_msg) { |
1da177e4 LT |
481 | disable_si_irq(smi_info); |
482 | smi_info->si_state = SI_NORMAL; | |
483 | return; | |
484 | } | |
485 | enable_si_irq(smi_info); | |
486 | ||
487 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
488 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
489 | smi_info->curr_msg->data_size = 2; | |
490 | ||
491 | smi_info->handlers->start_transaction( | |
492 | smi_info->si_sm, | |
493 | smi_info->curr_msg->data, | |
494 | smi_info->curr_msg->data_size); | |
495 | smi_info->si_state = SI_GETTING_MESSAGES; | |
496 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
497 | /* Events available. */ | |
498 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 499 | if (!smi_info->curr_msg) { |
1da177e4 LT |
500 | disable_si_irq(smi_info); |
501 | smi_info->si_state = SI_NORMAL; | |
502 | return; | |
503 | } | |
504 | enable_si_irq(smi_info); | |
505 | ||
506 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
507 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
508 | smi_info->curr_msg->data_size = 2; | |
509 | ||
510 | smi_info->handlers->start_transaction( | |
511 | smi_info->si_sm, | |
512 | smi_info->curr_msg->data, | |
513 | smi_info->curr_msg->data_size); | |
514 | smi_info->si_state = SI_GETTING_EVENTS; | |
4064d5ef | 515 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 516 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
517 | if (smi_info->oem_data_avail_handler(smi_info)) |
518 | goto retry; | |
c305e3d3 | 519 | } else |
1da177e4 | 520 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
521 | } |
522 | ||
523 | static void handle_transaction_done(struct smi_info *smi_info) | |
524 | { | |
525 | struct ipmi_smi_msg *msg; | |
526 | #ifdef DEBUG_TIMING | |
527 | struct timeval t; | |
528 | ||
529 | do_gettimeofday(&t); | |
c305e3d3 | 530 | printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
531 | #endif |
532 | switch (smi_info->si_state) { | |
533 | case SI_NORMAL: | |
b0defcdb | 534 | if (!smi_info->curr_msg) |
1da177e4 LT |
535 | break; |
536 | ||
537 | smi_info->curr_msg->rsp_size | |
538 | = smi_info->handlers->get_result( | |
539 | smi_info->si_sm, | |
540 | smi_info->curr_msg->rsp, | |
541 | IPMI_MAX_MSG_LENGTH); | |
542 | ||
c305e3d3 CM |
543 | /* |
544 | * Do this here becase deliver_recv_msg() releases the | |
545 | * lock, and a new message can be put in during the | |
546 | * time the lock is released. | |
547 | */ | |
1da177e4 LT |
548 | msg = smi_info->curr_msg; |
549 | smi_info->curr_msg = NULL; | |
550 | deliver_recv_msg(smi_info, msg); | |
551 | break; | |
552 | ||
553 | case SI_GETTING_FLAGS: | |
554 | { | |
555 | unsigned char msg[4]; | |
556 | unsigned int len; | |
557 | ||
558 | /* We got the flags from the SMI, now handle them. */ | |
559 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
560 | if (msg[2] != 0) { | |
c305e3d3 | 561 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
562 | smi_info->si_state = SI_NORMAL; |
563 | } else if (len < 4) { | |
c305e3d3 CM |
564 | /* |
565 | * Hmm, no flags. That's technically illegal, but | |
566 | * don't use uninitialized data. | |
567 | */ | |
1da177e4 LT |
568 | smi_info->si_state = SI_NORMAL; |
569 | } else { | |
570 | smi_info->msg_flags = msg[3]; | |
571 | handle_flags(smi_info); | |
572 | } | |
573 | break; | |
574 | } | |
575 | ||
576 | case SI_CLEARING_FLAGS: | |
577 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
578 | { | |
579 | unsigned char msg[3]; | |
580 | ||
581 | /* We cleared the flags. */ | |
582 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
583 | if (msg[2] != 0) { | |
584 | /* Error clearing flags */ | |
279fbd0c MS |
585 | dev_warn(smi_info->dev, |
586 | "Error clearing flags: %2.2x\n", msg[2]); | |
1da177e4 LT |
587 | } |
588 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
589 | start_enable_irq(smi_info); | |
590 | else | |
591 | smi_info->si_state = SI_NORMAL; | |
592 | break; | |
593 | } | |
594 | ||
595 | case SI_GETTING_EVENTS: | |
596 | { | |
597 | smi_info->curr_msg->rsp_size | |
598 | = smi_info->handlers->get_result( | |
599 | smi_info->si_sm, | |
600 | smi_info->curr_msg->rsp, | |
601 | IPMI_MAX_MSG_LENGTH); | |
602 | ||
c305e3d3 CM |
603 | /* |
604 | * Do this here becase deliver_recv_msg() releases the | |
605 | * lock, and a new message can be put in during the | |
606 | * time the lock is released. | |
607 | */ | |
1da177e4 LT |
608 | msg = smi_info->curr_msg; |
609 | smi_info->curr_msg = NULL; | |
610 | if (msg->rsp[2] != 0) { | |
611 | /* Error getting event, probably done. */ | |
612 | msg->done(msg); | |
613 | ||
614 | /* Take off the event flag. */ | |
615 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
616 | handle_flags(smi_info); | |
617 | } else { | |
64959e2d | 618 | smi_inc_stat(smi_info, events); |
1da177e4 | 619 | |
c305e3d3 CM |
620 | /* |
621 | * Do this before we deliver the message | |
622 | * because delivering the message releases the | |
623 | * lock and something else can mess with the | |
624 | * state. | |
625 | */ | |
1da177e4 LT |
626 | handle_flags(smi_info); |
627 | ||
628 | deliver_recv_msg(smi_info, msg); | |
629 | } | |
630 | break; | |
631 | } | |
632 | ||
633 | case SI_GETTING_MESSAGES: | |
634 | { | |
635 | smi_info->curr_msg->rsp_size | |
636 | = smi_info->handlers->get_result( | |
637 | smi_info->si_sm, | |
638 | smi_info->curr_msg->rsp, | |
639 | IPMI_MAX_MSG_LENGTH); | |
640 | ||
c305e3d3 CM |
641 | /* |
642 | * Do this here becase deliver_recv_msg() releases the | |
643 | * lock, and a new message can be put in during the | |
644 | * time the lock is released. | |
645 | */ | |
1da177e4 LT |
646 | msg = smi_info->curr_msg; |
647 | smi_info->curr_msg = NULL; | |
648 | if (msg->rsp[2] != 0) { | |
649 | /* Error getting event, probably done. */ | |
650 | msg->done(msg); | |
651 | ||
652 | /* Take off the msg flag. */ | |
653 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
654 | handle_flags(smi_info); | |
655 | } else { | |
64959e2d | 656 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 657 | |
c305e3d3 CM |
658 | /* |
659 | * Do this before we deliver the message | |
660 | * because delivering the message releases the | |
661 | * lock and something else can mess with the | |
662 | * state. | |
663 | */ | |
1da177e4 LT |
664 | handle_flags(smi_info); |
665 | ||
666 | deliver_recv_msg(smi_info, msg); | |
667 | } | |
668 | break; | |
669 | } | |
670 | ||
671 | case SI_ENABLE_INTERRUPTS1: | |
672 | { | |
673 | unsigned char msg[4]; | |
674 | ||
675 | /* We got the flags from the SMI, now handle them. */ | |
676 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
677 | if (msg[2] != 0) { | |
279fbd0c MS |
678 | dev_warn(smi_info->dev, "Could not enable interrupts" |
679 | ", failed get, using polled mode.\n"); | |
1da177e4 LT |
680 | smi_info->si_state = SI_NORMAL; |
681 | } else { | |
682 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
683 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
ee6cd5f8 CM |
684 | msg[2] = (msg[3] | |
685 | IPMI_BMC_RCV_MSG_INTR | | |
686 | IPMI_BMC_EVT_MSG_INTR); | |
1da177e4 LT |
687 | smi_info->handlers->start_transaction( |
688 | smi_info->si_sm, msg, 3); | |
689 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
690 | } | |
691 | break; | |
692 | } | |
693 | ||
694 | case SI_ENABLE_INTERRUPTS2: | |
695 | { | |
696 | unsigned char msg[4]; | |
697 | ||
698 | /* We got the flags from the SMI, now handle them. */ | |
699 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
279fbd0c MS |
700 | if (msg[2] != 0) |
701 | dev_warn(smi_info->dev, "Could not enable interrupts" | |
702 | ", failed set, using polled mode.\n"); | |
703 | else | |
ea4078ca | 704 | smi_info->interrupt_disabled = 0; |
1da177e4 LT |
705 | smi_info->si_state = SI_NORMAL; |
706 | break; | |
707 | } | |
ee6cd5f8 CM |
708 | |
709 | case SI_DISABLE_INTERRUPTS1: | |
710 | { | |
711 | unsigned char msg[4]; | |
712 | ||
713 | /* We got the flags from the SMI, now handle them. */ | |
714 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
715 | if (msg[2] != 0) { | |
279fbd0c MS |
716 | dev_warn(smi_info->dev, "Could not disable interrupts" |
717 | ", failed get.\n"); | |
ee6cd5f8 CM |
718 | smi_info->si_state = SI_NORMAL; |
719 | } else { | |
720 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
721 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
722 | msg[2] = (msg[3] & | |
723 | ~(IPMI_BMC_RCV_MSG_INTR | | |
724 | IPMI_BMC_EVT_MSG_INTR)); | |
725 | smi_info->handlers->start_transaction( | |
726 | smi_info->si_sm, msg, 3); | |
727 | smi_info->si_state = SI_DISABLE_INTERRUPTS2; | |
728 | } | |
729 | break; | |
730 | } | |
731 | ||
732 | case SI_DISABLE_INTERRUPTS2: | |
733 | { | |
734 | unsigned char msg[4]; | |
735 | ||
736 | /* We got the flags from the SMI, now handle them. */ | |
737 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
738 | if (msg[2] != 0) { | |
279fbd0c MS |
739 | dev_warn(smi_info->dev, "Could not disable interrupts" |
740 | ", failed set.\n"); | |
ee6cd5f8 CM |
741 | } |
742 | smi_info->si_state = SI_NORMAL; | |
743 | break; | |
744 | } | |
1da177e4 LT |
745 | } |
746 | } | |
747 | ||
c305e3d3 CM |
748 | /* |
749 | * Called on timeouts and events. Timeouts should pass the elapsed | |
750 | * time, interrupts should pass in zero. Must be called with | |
751 | * si_lock held and interrupts disabled. | |
752 | */ | |
1da177e4 LT |
753 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
754 | int time) | |
755 | { | |
756 | enum si_sm_result si_sm_result; | |
757 | ||
758 | restart: | |
c305e3d3 CM |
759 | /* |
760 | * There used to be a loop here that waited a little while | |
761 | * (around 25us) before giving up. That turned out to be | |
762 | * pointless, the minimum delays I was seeing were in the 300us | |
763 | * range, which is far too long to wait in an interrupt. So | |
764 | * we just run until the state machine tells us something | |
765 | * happened or it needs a delay. | |
766 | */ | |
1da177e4 LT |
767 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
768 | time = 0; | |
769 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 770 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 771 | |
c305e3d3 | 772 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 773 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
774 | |
775 | handle_transaction_done(smi_info); | |
776 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 777 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 778 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 779 | |
c305e3d3 CM |
780 | /* |
781 | * Do the before return_hosed_msg, because that | |
782 | * releases the lock. | |
783 | */ | |
1da177e4 LT |
784 | smi_info->si_state = SI_NORMAL; |
785 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
786 | /* |
787 | * If we were handling a user message, format | |
788 | * a response to send to the upper layer to | |
789 | * tell it about the error. | |
790 | */ | |
4d7cbac7 | 791 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
792 | } |
793 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
794 | } | |
795 | ||
4ea18425 CM |
796 | /* |
797 | * We prefer handling attn over new messages. But don't do | |
798 | * this if there is not yet an upper layer to handle anything. | |
799 | */ | |
c305e3d3 | 800 | if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) { |
1da177e4 LT |
801 | unsigned char msg[2]; |
802 | ||
64959e2d | 803 | smi_inc_stat(smi_info, attentions); |
1da177e4 | 804 | |
c305e3d3 CM |
805 | /* |
806 | * Got a attn, send down a get message flags to see | |
807 | * what's causing it. It would be better to handle | |
808 | * this in the upper layer, but due to the way | |
809 | * interrupts work with the SMI, that's not really | |
810 | * possible. | |
811 | */ | |
1da177e4 LT |
812 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
813 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
814 | ||
815 | smi_info->handlers->start_transaction( | |
816 | smi_info->si_sm, msg, 2); | |
817 | smi_info->si_state = SI_GETTING_FLAGS; | |
818 | goto restart; | |
819 | } | |
820 | ||
821 | /* If we are currently idle, try to start the next message. */ | |
822 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 823 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
824 | |
825 | si_sm_result = start_next_msg(smi_info); | |
826 | if (si_sm_result != SI_SM_IDLE) | |
827 | goto restart; | |
c305e3d3 | 828 | } |
1da177e4 LT |
829 | |
830 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
831 | && (atomic_read(&smi_info->req_events))) { |
832 | /* | |
833 | * We are idle and the upper layer requested that I fetch | |
834 | * events, so do so. | |
835 | */ | |
55162fb1 | 836 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 837 | |
55162fb1 CM |
838 | smi_info->curr_msg = ipmi_alloc_smi_msg(); |
839 | if (!smi_info->curr_msg) | |
840 | goto out; | |
1da177e4 | 841 | |
55162fb1 CM |
842 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
843 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
844 | smi_info->curr_msg->data_size = 2; | |
1da177e4 LT |
845 | |
846 | smi_info->handlers->start_transaction( | |
55162fb1 CM |
847 | smi_info->si_sm, |
848 | smi_info->curr_msg->data, | |
849 | smi_info->curr_msg->data_size); | |
850 | smi_info->si_state = SI_GETTING_EVENTS; | |
1da177e4 LT |
851 | goto restart; |
852 | } | |
55162fb1 | 853 | out: |
1da177e4 LT |
854 | return si_sm_result; |
855 | } | |
856 | ||
857 | static void sender(void *send_info, | |
858 | struct ipmi_smi_msg *msg, | |
859 | int priority) | |
860 | { | |
861 | struct smi_info *smi_info = send_info; | |
862 | enum si_sm_result result; | |
863 | unsigned long flags; | |
864 | #ifdef DEBUG_TIMING | |
865 | struct timeval t; | |
866 | #endif | |
867 | ||
b361e27b CM |
868 | if (atomic_read(&smi_info->stop_operation)) { |
869 | msg->rsp[0] = msg->data[0] | 4; | |
870 | msg->rsp[1] = msg->data[1]; | |
871 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
872 | msg->rsp_size = 3; | |
873 | deliver_recv_msg(smi_info, msg); | |
874 | return; | |
875 | } | |
876 | ||
1da177e4 LT |
877 | #ifdef DEBUG_TIMING |
878 | do_gettimeofday(&t); | |
879 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
880 | #endif | |
881 | ||
4c418ba9 DY |
882 | /* |
883 | * last_timeout_jiffies is updated here to avoid | |
884 | * smi_timeout() handler passing very large time_diff | |
885 | * value to smi_event_handler() that causes | |
886 | * the send command to abort. | |
887 | */ | |
888 | smi_info->last_timeout_jiffies = jiffies; | |
889 | ||
ea4078ca MG |
890 | mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES); |
891 | ||
3326f4f2 MG |
892 | if (smi_info->thread) |
893 | wake_up_process(smi_info->thread); | |
894 | ||
1da177e4 | 895 | if (smi_info->run_to_completion) { |
bda4c30a CM |
896 | /* |
897 | * If we are running to completion, then throw it in | |
898 | * the list and run transactions until everything is | |
899 | * clear. Priority doesn't matter here. | |
900 | */ | |
901 | ||
902 | /* | |
903 | * Run to completion means we are single-threaded, no | |
904 | * need for locks. | |
905 | */ | |
1da177e4 LT |
906 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); |
907 | ||
1da177e4 LT |
908 | result = smi_event_handler(smi_info, 0); |
909 | while (result != SI_SM_IDLE) { | |
910 | udelay(SI_SHORT_TIMEOUT_USEC); | |
911 | result = smi_event_handler(smi_info, | |
912 | SI_SHORT_TIMEOUT_USEC); | |
913 | } | |
1da177e4 | 914 | return; |
1da177e4 | 915 | } |
1da177e4 | 916 | |
bda4c30a CM |
917 | spin_lock_irqsave(&smi_info->msg_lock, flags); |
918 | if (priority > 0) | |
919 | list_add_tail(&msg->link, &smi_info->hp_xmit_msgs); | |
920 | else | |
921 | list_add_tail(&msg->link, &smi_info->xmit_msgs); | |
922 | spin_unlock_irqrestore(&smi_info->msg_lock, flags); | |
923 | ||
924 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
b88e7693 | 925 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) { |
1da177e4 | 926 | start_next_msg(smi_info); |
b88e7693 S |
927 | smi_event_handler(smi_info, 0); |
928 | } | |
bda4c30a | 929 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
930 | } |
931 | ||
932 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
933 | { | |
934 | struct smi_info *smi_info = send_info; | |
935 | enum si_sm_result result; | |
1da177e4 LT |
936 | |
937 | smi_info->run_to_completion = i_run_to_completion; | |
938 | if (i_run_to_completion) { | |
939 | result = smi_event_handler(smi_info, 0); | |
940 | while (result != SI_SM_IDLE) { | |
941 | udelay(SI_SHORT_TIMEOUT_USEC); | |
942 | result = smi_event_handler(smi_info, | |
943 | SI_SHORT_TIMEOUT_USEC); | |
944 | } | |
945 | } | |
1da177e4 LT |
946 | } |
947 | ||
ae74e823 MW |
948 | /* |
949 | * Use -1 in the nsec value of the busy waiting timespec to tell that | |
950 | * we are spinning in kipmid looking for something and not delaying | |
951 | * between checks | |
952 | */ | |
953 | static inline void ipmi_si_set_not_busy(struct timespec *ts) | |
954 | { | |
955 | ts->tv_nsec = -1; | |
956 | } | |
957 | static inline int ipmi_si_is_busy(struct timespec *ts) | |
958 | { | |
959 | return ts->tv_nsec != -1; | |
960 | } | |
961 | ||
962 | static int ipmi_thread_busy_wait(enum si_sm_result smi_result, | |
963 | const struct smi_info *smi_info, | |
964 | struct timespec *busy_until) | |
965 | { | |
966 | unsigned int max_busy_us = 0; | |
967 | ||
968 | if (smi_info->intf_num < num_max_busy_us) | |
969 | max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; | |
970 | if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) | |
971 | ipmi_si_set_not_busy(busy_until); | |
972 | else if (!ipmi_si_is_busy(busy_until)) { | |
973 | getnstimeofday(busy_until); | |
974 | timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); | |
975 | } else { | |
976 | struct timespec now; | |
977 | getnstimeofday(&now); | |
978 | if (unlikely(timespec_compare(&now, busy_until) > 0)) { | |
979 | ipmi_si_set_not_busy(busy_until); | |
980 | return 0; | |
981 | } | |
982 | } | |
983 | return 1; | |
984 | } | |
985 | ||
986 | ||
987 | /* | |
988 | * A busy-waiting loop for speeding up IPMI operation. | |
989 | * | |
990 | * Lousy hardware makes this hard. This is only enabled for systems | |
991 | * that are not BT and do not have interrupts. It starts spinning | |
992 | * when an operation is complete or until max_busy tells it to stop | |
993 | * (if that is enabled). See the paragraph on kimid_max_busy_us in | |
994 | * Documentation/IPMI.txt for details. | |
995 | */ | |
a9a2c44f CM |
996 | static int ipmi_thread(void *data) |
997 | { | |
998 | struct smi_info *smi_info = data; | |
e9a705a0 | 999 | unsigned long flags; |
a9a2c44f | 1000 | enum si_sm_result smi_result; |
ae74e823 | 1001 | struct timespec busy_until; |
a9a2c44f | 1002 | |
ae74e823 | 1003 | ipmi_si_set_not_busy(&busy_until); |
a9a2c44f | 1004 | set_user_nice(current, 19); |
e9a705a0 | 1005 | while (!kthread_should_stop()) { |
ae74e823 MW |
1006 | int busy_wait; |
1007 | ||
a9a2c44f | 1008 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 1009 | smi_result = smi_event_handler(smi_info, 0); |
a9a2c44f | 1010 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
ae74e823 MW |
1011 | busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, |
1012 | &busy_until); | |
c305e3d3 CM |
1013 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
1014 | ; /* do nothing */ | |
ae74e823 | 1015 | else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) |
33979734 | 1016 | schedule(); |
3326f4f2 MG |
1017 | else if (smi_result == SI_SM_IDLE) |
1018 | schedule_timeout_interruptible(100); | |
e9a705a0 | 1019 | else |
8d1f66dc | 1020 | schedule_timeout_interruptible(1); |
a9a2c44f | 1021 | } |
a9a2c44f CM |
1022 | return 0; |
1023 | } | |
1024 | ||
1025 | ||
1da177e4 LT |
1026 | static void poll(void *send_info) |
1027 | { | |
1028 | struct smi_info *smi_info = send_info; | |
fcfa4724 | 1029 | unsigned long flags; |
1da177e4 | 1030 | |
15c62e10 CM |
1031 | /* |
1032 | * Make sure there is some delay in the poll loop so we can | |
1033 | * drive time forward and timeout things. | |
1034 | */ | |
1035 | udelay(10); | |
fcfa4724 | 1036 | spin_lock_irqsave(&smi_info->si_lock, flags); |
15c62e10 | 1037 | smi_event_handler(smi_info, 10); |
fcfa4724 | 1038 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | static void request_events(void *send_info) | |
1042 | { | |
1043 | struct smi_info *smi_info = send_info; | |
1044 | ||
40112ae7 CM |
1045 | if (atomic_read(&smi_info->stop_operation) || |
1046 | !smi_info->has_event_buffer) | |
b361e27b CM |
1047 | return; |
1048 | ||
1da177e4 LT |
1049 | atomic_set(&smi_info->req_events, 1); |
1050 | } | |
1051 | ||
0c8204b3 | 1052 | static int initialized; |
1da177e4 | 1053 | |
1da177e4 LT |
1054 | static void smi_timeout(unsigned long data) |
1055 | { | |
1056 | struct smi_info *smi_info = (struct smi_info *) data; | |
1057 | enum si_sm_result smi_result; | |
1058 | unsigned long flags; | |
1059 | unsigned long jiffies_now; | |
c4edff1c | 1060 | long time_diff; |
3326f4f2 | 1061 | long timeout; |
1da177e4 LT |
1062 | #ifdef DEBUG_TIMING |
1063 | struct timeval t; | |
1064 | #endif | |
1065 | ||
1da177e4 LT |
1066 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
1067 | #ifdef DEBUG_TIMING | |
1068 | do_gettimeofday(&t); | |
c305e3d3 | 1069 | printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1070 | #endif |
1071 | jiffies_now = jiffies; | |
c4edff1c | 1072 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
1073 | * SI_USEC_PER_JIFFY); |
1074 | smi_result = smi_event_handler(smi_info, time_diff); | |
1075 | ||
1076 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1077 | ||
1078 | smi_info->last_timeout_jiffies = jiffies_now; | |
1079 | ||
b0defcdb | 1080 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 | 1081 | /* Running with interrupts, only do long timeouts. */ |
3326f4f2 | 1082 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
64959e2d | 1083 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1084 | goto do_mod_timer; |
1da177e4 LT |
1085 | } |
1086 | ||
c305e3d3 CM |
1087 | /* |
1088 | * If the state machine asks for a short delay, then shorten | |
1089 | * the timer timeout. | |
1090 | */ | |
1da177e4 | 1091 | if (smi_result == SI_SM_CALL_WITH_DELAY) { |
64959e2d | 1092 | smi_inc_stat(smi_info, short_timeouts); |
3326f4f2 | 1093 | timeout = jiffies + 1; |
1da177e4 | 1094 | } else { |
64959e2d | 1095 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1096 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1097 | } |
1098 | ||
3326f4f2 MG |
1099 | do_mod_timer: |
1100 | if (smi_result != SI_SM_IDLE) | |
1101 | mod_timer(&(smi_info->si_timer), timeout); | |
1da177e4 LT |
1102 | } |
1103 | ||
7d12e780 | 1104 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
1105 | { |
1106 | struct smi_info *smi_info = data; | |
1107 | unsigned long flags; | |
1108 | #ifdef DEBUG_TIMING | |
1109 | struct timeval t; | |
1110 | #endif | |
1111 | ||
1112 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1113 | ||
64959e2d | 1114 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1115 | |
1da177e4 LT |
1116 | #ifdef DEBUG_TIMING |
1117 | do_gettimeofday(&t); | |
c305e3d3 | 1118 | printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1119 | #endif |
1120 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1121 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1122 | return IRQ_HANDLED; | |
1123 | } | |
1124 | ||
7d12e780 | 1125 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
1126 | { |
1127 | struct smi_info *smi_info = data; | |
1128 | /* We need to clear the IRQ flag for the BT interface. */ | |
1129 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1130 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1131 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 1132 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
1133 | } |
1134 | ||
453823ba CM |
1135 | static int smi_start_processing(void *send_info, |
1136 | ipmi_smi_t intf) | |
1137 | { | |
1138 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1139 | int enable = 0; |
453823ba CM |
1140 | |
1141 | new_smi->intf = intf; | |
1142 | ||
c45adc39 CM |
1143 | /* Try to claim any interrupts. */ |
1144 | if (new_smi->irq_setup) | |
1145 | new_smi->irq_setup(new_smi); | |
1146 | ||
453823ba CM |
1147 | /* Set up the timer that drives the interface. */ |
1148 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
1149 | new_smi->last_timeout_jiffies = jiffies; | |
1150 | mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
1151 | ||
a51f4a81 CM |
1152 | /* |
1153 | * Check if the user forcefully enabled the daemon. | |
1154 | */ | |
1155 | if (new_smi->intf_num < num_force_kipmid) | |
1156 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1157 | /* |
1158 | * The BT interface is efficient enough to not need a thread, | |
1159 | * and there is no need for a thread if we have interrupts. | |
1160 | */ | |
c305e3d3 | 1161 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
a51f4a81 CM |
1162 | enable = 1; |
1163 | ||
1164 | if (enable) { | |
453823ba CM |
1165 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1166 | "kipmi%d", new_smi->intf_num); | |
1167 | if (IS_ERR(new_smi->thread)) { | |
279fbd0c MS |
1168 | dev_notice(new_smi->dev, "Could not start" |
1169 | " kernel thread due to error %ld, only using" | |
1170 | " timers to drive the interface\n", | |
1171 | PTR_ERR(new_smi->thread)); | |
453823ba CM |
1172 | new_smi->thread = NULL; |
1173 | } | |
1174 | } | |
1175 | ||
1176 | return 0; | |
1177 | } | |
9dbf68f9 | 1178 | |
16f4232c ZY |
1179 | static int get_smi_info(void *send_info, struct ipmi_smi_info *data) |
1180 | { | |
1181 | struct smi_info *smi = send_info; | |
1182 | ||
1183 | data->addr_src = smi->addr_source; | |
1184 | data->dev = smi->dev; | |
1185 | data->addr_info = smi->addr_info; | |
1186 | get_device(smi->dev); | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
b9675136 CM |
1191 | static void set_maintenance_mode(void *send_info, int enable) |
1192 | { | |
1193 | struct smi_info *smi_info = send_info; | |
1194 | ||
1195 | if (!enable) | |
1196 | atomic_set(&smi_info->req_events, 0); | |
1197 | } | |
1198 | ||
c305e3d3 | 1199 | static struct ipmi_smi_handlers handlers = { |
1da177e4 | 1200 | .owner = THIS_MODULE, |
453823ba | 1201 | .start_processing = smi_start_processing, |
16f4232c | 1202 | .get_smi_info = get_smi_info, |
1da177e4 LT |
1203 | .sender = sender, |
1204 | .request_events = request_events, | |
b9675136 | 1205 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
1206 | .set_run_to_completion = set_run_to_completion, |
1207 | .poll = poll, | |
1208 | }; | |
1209 | ||
c305e3d3 CM |
1210 | /* |
1211 | * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1212 | * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. | |
1213 | */ | |
1da177e4 | 1214 | |
b0defcdb | 1215 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1216 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1217 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1218 | |
1da177e4 | 1219 | #define DEFAULT_REGSPACING 1 |
dba9b4f6 | 1220 | #define DEFAULT_REGSIZE 1 |
1da177e4 | 1221 | |
90ab5ee9 | 1222 | static bool si_trydefaults = 1; |
1da177e4 LT |
1223 | static char *si_type[SI_MAX_PARMS]; |
1224 | #define MAX_SI_TYPE_STR 30 | |
1225 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1226 | static unsigned long addrs[SI_MAX_PARMS]; | |
64a6f950 | 1227 | static unsigned int num_addrs; |
1da177e4 | 1228 | static unsigned int ports[SI_MAX_PARMS]; |
64a6f950 | 1229 | static unsigned int num_ports; |
1da177e4 | 1230 | static int irqs[SI_MAX_PARMS]; |
64a6f950 | 1231 | static unsigned int num_irqs; |
1da177e4 | 1232 | static int regspacings[SI_MAX_PARMS]; |
64a6f950 | 1233 | static unsigned int num_regspacings; |
1da177e4 | 1234 | static int regsizes[SI_MAX_PARMS]; |
64a6f950 | 1235 | static unsigned int num_regsizes; |
1da177e4 | 1236 | static int regshifts[SI_MAX_PARMS]; |
64a6f950 | 1237 | static unsigned int num_regshifts; |
2f95d513 | 1238 | static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ |
64a6f950 | 1239 | static unsigned int num_slave_addrs; |
1da177e4 | 1240 | |
b361e27b CM |
1241 | #define IPMI_IO_ADDR_SPACE 0 |
1242 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1243 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1244 | |
1245 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1246 | ||
1247 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1248 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1249 | " Documentation/IPMI.txt in the kernel sources for the" | |
1250 | " gory details."); | |
1da177e4 LT |
1251 | |
1252 | module_param_named(trydefaults, si_trydefaults, bool, 0); | |
1253 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1254 | " default scan of the KCS and SMIC interface at the standard" | |
1255 | " address"); | |
1256 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1257 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1258 | " interface separated by commas. The types are 'kcs'," | |
1259 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1260 | " the first interface to kcs and the second to bt"); | |
64a6f950 | 1261 | module_param_array(addrs, ulong, &num_addrs, 0); |
1da177e4 LT |
1262 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" |
1263 | " addresses separated by commas. Only use if an interface" | |
1264 | " is in memory. Otherwise, set it to zero or leave" | |
1265 | " it blank."); | |
64a6f950 | 1266 | module_param_array(ports, uint, &num_ports, 0); |
1da177e4 LT |
1267 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" |
1268 | " addresses separated by commas. Only use if an interface" | |
1269 | " is a port. Otherwise, set it to zero or leave" | |
1270 | " it blank."); | |
1271 | module_param_array(irqs, int, &num_irqs, 0); | |
1272 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1273 | " addresses separated by commas. Only use if an interface" | |
1274 | " has an interrupt. Otherwise, set it to zero or leave" | |
1275 | " it blank."); | |
1276 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1277 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1278 | " and each successive register used by the interface. For" | |
1279 | " instance, if the start address is 0xca2 and the spacing" | |
1280 | " is 2, then the second address is at 0xca4. Defaults" | |
1281 | " to 1."); | |
1282 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1283 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1284 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1285 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1286 | " the 8-bit IPMI register has to be read from a larger" | |
1287 | " register."); | |
1288 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1289 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1290 | " IPMI register, in bits. For instance, if the data" | |
1291 | " is read from a 32-bit word and the IPMI data is in" | |
1292 | " bit 8-15, then the shift would be 8"); | |
1293 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1294 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1295 | " the controller. Normally this is 0x20, but can be" | |
1296 | " overridden by this parm. This is an array indexed" | |
1297 | " by interface number."); | |
a51f4a81 CM |
1298 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1299 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1300 | " disabled(0). Normally the IPMI driver auto-detects" | |
1301 | " this, but the value may be overridden by this parm."); | |
b361e27b CM |
1302 | module_param(unload_when_empty, int, 0); |
1303 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" | |
1304 | " specified or found, default is 1. Setting to 0" | |
1305 | " is useful for hot add of devices using hotmod."); | |
ae74e823 MW |
1306 | module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); |
1307 | MODULE_PARM_DESC(kipmid_max_busy_us, | |
1308 | "Max time (in microseconds) to busy-wait for IPMI data before" | |
1309 | " sleeping. 0 (default) means to wait forever. Set to 100-500" | |
1310 | " if kipmid is using up a lot of CPU time."); | |
1da177e4 LT |
1311 | |
1312 | ||
b0defcdb | 1313 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1314 | { |
b0defcdb CM |
1315 | if (info->si_type == SI_BT) |
1316 | /* Disable the interrupt in the BT interface. */ | |
1317 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1318 | free_irq(info->irq, info); | |
1da177e4 | 1319 | } |
1da177e4 LT |
1320 | |
1321 | static int std_irq_setup(struct smi_info *info) | |
1322 | { | |
1323 | int rv; | |
1324 | ||
b0defcdb | 1325 | if (!info->irq) |
1da177e4 LT |
1326 | return 0; |
1327 | ||
9dbf68f9 CM |
1328 | if (info->si_type == SI_BT) { |
1329 | rv = request_irq(info->irq, | |
1330 | si_bt_irq_handler, | |
ee6cd5f8 | 1331 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1332 | DEVICE_NAME, |
1333 | info); | |
b0defcdb | 1334 | if (!rv) |
9dbf68f9 CM |
1335 | /* Enable the interrupt in the BT interface. */ |
1336 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1337 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1338 | } else | |
1339 | rv = request_irq(info->irq, | |
1340 | si_irq_handler, | |
ee6cd5f8 | 1341 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1342 | DEVICE_NAME, |
1343 | info); | |
1da177e4 | 1344 | if (rv) { |
279fbd0c MS |
1345 | dev_warn(info->dev, "%s unable to claim interrupt %d," |
1346 | " running polled\n", | |
1347 | DEVICE_NAME, info->irq); | |
1da177e4 LT |
1348 | info->irq = 0; |
1349 | } else { | |
b0defcdb | 1350 | info->irq_cleanup = std_irq_cleanup; |
279fbd0c | 1351 | dev_info(info->dev, "Using irq %d\n", info->irq); |
1da177e4 LT |
1352 | } |
1353 | ||
1354 | return rv; | |
1355 | } | |
1356 | ||
1da177e4 LT |
1357 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1358 | { | |
b0defcdb | 1359 | unsigned int addr = io->addr_data; |
1da177e4 | 1360 | |
b0defcdb | 1361 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1362 | } |
1363 | ||
1364 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1365 | unsigned char b) | |
1366 | { | |
b0defcdb | 1367 | unsigned int addr = io->addr_data; |
1da177e4 | 1368 | |
b0defcdb | 1369 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1370 | } |
1371 | ||
1372 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1373 | { | |
b0defcdb | 1374 | unsigned int addr = io->addr_data; |
1da177e4 | 1375 | |
b0defcdb | 1376 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1377 | } |
1378 | ||
1379 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1380 | unsigned char b) | |
1381 | { | |
b0defcdb | 1382 | unsigned int addr = io->addr_data; |
1da177e4 | 1383 | |
b0defcdb | 1384 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1385 | } |
1386 | ||
1387 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1388 | { | |
b0defcdb | 1389 | unsigned int addr = io->addr_data; |
1da177e4 | 1390 | |
b0defcdb | 1391 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1392 | } |
1393 | ||
1394 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1395 | unsigned char b) | |
1396 | { | |
b0defcdb | 1397 | unsigned int addr = io->addr_data; |
1da177e4 | 1398 | |
b0defcdb | 1399 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1400 | } |
1401 | ||
1402 | static void port_cleanup(struct smi_info *info) | |
1403 | { | |
b0defcdb | 1404 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1405 | int idx; |
1da177e4 | 1406 | |
b0defcdb | 1407 | if (addr) { |
c305e3d3 | 1408 | for (idx = 0; idx < info->io_size; idx++) |
d61a3ead CM |
1409 | release_region(addr + idx * info->io.regspacing, |
1410 | info->io.regsize); | |
1da177e4 | 1411 | } |
1da177e4 LT |
1412 | } |
1413 | ||
1414 | static int port_setup(struct smi_info *info) | |
1415 | { | |
b0defcdb | 1416 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1417 | int idx; |
1da177e4 | 1418 | |
b0defcdb | 1419 | if (!addr) |
1da177e4 LT |
1420 | return -ENODEV; |
1421 | ||
1422 | info->io_cleanup = port_cleanup; | |
1423 | ||
c305e3d3 CM |
1424 | /* |
1425 | * Figure out the actual inb/inw/inl/etc routine to use based | |
1426 | * upon the register size. | |
1427 | */ | |
1da177e4 LT |
1428 | switch (info->io.regsize) { |
1429 | case 1: | |
1430 | info->io.inputb = port_inb; | |
1431 | info->io.outputb = port_outb; | |
1432 | break; | |
1433 | case 2: | |
1434 | info->io.inputb = port_inw; | |
1435 | info->io.outputb = port_outw; | |
1436 | break; | |
1437 | case 4: | |
1438 | info->io.inputb = port_inl; | |
1439 | info->io.outputb = port_outl; | |
1440 | break; | |
1441 | default: | |
279fbd0c MS |
1442 | dev_warn(info->dev, "Invalid register size: %d\n", |
1443 | info->io.regsize); | |
1da177e4 LT |
1444 | return -EINVAL; |
1445 | } | |
1446 | ||
c305e3d3 CM |
1447 | /* |
1448 | * Some BIOSes reserve disjoint I/O regions in their ACPI | |
d61a3ead CM |
1449 | * tables. This causes problems when trying to register the |
1450 | * entire I/O region. Therefore we must register each I/O | |
1451 | * port separately. | |
1452 | */ | |
c305e3d3 | 1453 | for (idx = 0; idx < info->io_size; idx++) { |
d61a3ead CM |
1454 | if (request_region(addr + idx * info->io.regspacing, |
1455 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1456 | /* Undo allocations */ | |
1457 | while (idx--) { | |
1458 | release_region(addr + idx * info->io.regspacing, | |
1459 | info->io.regsize); | |
1460 | } | |
1461 | return -EIO; | |
1462 | } | |
1463 | } | |
1da177e4 LT |
1464 | return 0; |
1465 | } | |
1466 | ||
546cfdf4 | 1467 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1468 | { |
1469 | return readb((io->addr)+(offset * io->regspacing)); | |
1470 | } | |
1471 | ||
546cfdf4 | 1472 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1473 | unsigned char b) |
1474 | { | |
1475 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1476 | } | |
1477 | ||
546cfdf4 | 1478 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1479 | { |
1480 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1481 | & 0xff; |
1da177e4 LT |
1482 | } |
1483 | ||
546cfdf4 | 1484 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1485 | unsigned char b) |
1486 | { | |
1487 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1488 | } | |
1489 | ||
546cfdf4 | 1490 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1491 | { |
1492 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1493 | & 0xff; |
1da177e4 LT |
1494 | } |
1495 | ||
546cfdf4 | 1496 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1497 | unsigned char b) |
1498 | { | |
1499 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1500 | } | |
1501 | ||
1502 | #ifdef readq | |
1503 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1504 | { | |
1505 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1506 | & 0xff; |
1da177e4 LT |
1507 | } |
1508 | ||
1509 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1510 | unsigned char b) | |
1511 | { | |
1512 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1513 | } | |
1514 | #endif | |
1515 | ||
1516 | static void mem_cleanup(struct smi_info *info) | |
1517 | { | |
b0defcdb | 1518 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1519 | int mapsize; |
1520 | ||
1521 | if (info->io.addr) { | |
1522 | iounmap(info->io.addr); | |
1523 | ||
1524 | mapsize = ((info->io_size * info->io.regspacing) | |
1525 | - (info->io.regspacing - info->io.regsize)); | |
1526 | ||
b0defcdb | 1527 | release_mem_region(addr, mapsize); |
1da177e4 | 1528 | } |
1da177e4 LT |
1529 | } |
1530 | ||
1531 | static int mem_setup(struct smi_info *info) | |
1532 | { | |
b0defcdb | 1533 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1534 | int mapsize; |
1535 | ||
b0defcdb | 1536 | if (!addr) |
1da177e4 LT |
1537 | return -ENODEV; |
1538 | ||
1539 | info->io_cleanup = mem_cleanup; | |
1540 | ||
c305e3d3 CM |
1541 | /* |
1542 | * Figure out the actual readb/readw/readl/etc routine to use based | |
1543 | * upon the register size. | |
1544 | */ | |
1da177e4 LT |
1545 | switch (info->io.regsize) { |
1546 | case 1: | |
546cfdf4 AD |
1547 | info->io.inputb = intf_mem_inb; |
1548 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1549 | break; |
1550 | case 2: | |
546cfdf4 AD |
1551 | info->io.inputb = intf_mem_inw; |
1552 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1553 | break; |
1554 | case 4: | |
546cfdf4 AD |
1555 | info->io.inputb = intf_mem_inl; |
1556 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1557 | break; |
1558 | #ifdef readq | |
1559 | case 8: | |
1560 | info->io.inputb = mem_inq; | |
1561 | info->io.outputb = mem_outq; | |
1562 | break; | |
1563 | #endif | |
1564 | default: | |
279fbd0c MS |
1565 | dev_warn(info->dev, "Invalid register size: %d\n", |
1566 | info->io.regsize); | |
1da177e4 LT |
1567 | return -EINVAL; |
1568 | } | |
1569 | ||
c305e3d3 CM |
1570 | /* |
1571 | * Calculate the total amount of memory to claim. This is an | |
1da177e4 LT |
1572 | * unusual looking calculation, but it avoids claiming any |
1573 | * more memory than it has to. It will claim everything | |
1574 | * between the first address to the end of the last full | |
c305e3d3 CM |
1575 | * register. |
1576 | */ | |
1da177e4 LT |
1577 | mapsize = ((info->io_size * info->io.regspacing) |
1578 | - (info->io.regspacing - info->io.regsize)); | |
1579 | ||
b0defcdb | 1580 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1581 | return -EIO; |
1582 | ||
b0defcdb | 1583 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1584 | if (info->io.addr == NULL) { |
b0defcdb | 1585 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1586 | return -EIO; |
1587 | } | |
1588 | return 0; | |
1589 | } | |
1590 | ||
b361e27b CM |
1591 | /* |
1592 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1593 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1594 | * Options are: | |
1595 | * rsp=<regspacing> | |
1596 | * rsi=<regsize> | |
1597 | * rsh=<regshift> | |
1598 | * irq=<irq> | |
1599 | * ipmb=<ipmb addr> | |
1600 | */ | |
1601 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1602 | struct hotmod_vals { | |
1603 | char *name; | |
1604 | int val; | |
1605 | }; | |
1606 | static struct hotmod_vals hotmod_ops[] = { | |
1607 | { "add", HM_ADD }, | |
1608 | { "remove", HM_REMOVE }, | |
1609 | { NULL } | |
1610 | }; | |
1611 | static struct hotmod_vals hotmod_si[] = { | |
1612 | { "kcs", SI_KCS }, | |
1613 | { "smic", SI_SMIC }, | |
1614 | { "bt", SI_BT }, | |
1615 | { NULL } | |
1616 | }; | |
1617 | static struct hotmod_vals hotmod_as[] = { | |
1618 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1619 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1620 | { NULL } | |
1621 | }; | |
1d5636cc | 1622 | |
b361e27b CM |
1623 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1624 | { | |
1625 | char *s; | |
1626 | int i; | |
1627 | ||
1628 | s = strchr(*curr, ','); | |
1629 | if (!s) { | |
1630 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1631 | return -EINVAL; | |
1632 | } | |
1633 | *s = '\0'; | |
1634 | s++; | |
1635 | for (i = 0; hotmod_ops[i].name; i++) { | |
1d5636cc | 1636 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1637 | *val = v[i].val; |
1638 | *curr = s; | |
1639 | return 0; | |
1640 | } | |
1641 | } | |
1642 | ||
1643 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1644 | return -EINVAL; | |
1645 | } | |
1646 | ||
1d5636cc CM |
1647 | static int check_hotmod_int_op(const char *curr, const char *option, |
1648 | const char *name, int *val) | |
1649 | { | |
1650 | char *n; | |
1651 | ||
1652 | if (strcmp(curr, name) == 0) { | |
1653 | if (!option) { | |
1654 | printk(KERN_WARNING PFX | |
1655 | "No option given for '%s'\n", | |
1656 | curr); | |
1657 | return -EINVAL; | |
1658 | } | |
1659 | *val = simple_strtoul(option, &n, 0); | |
1660 | if ((*n != '\0') || (*option == '\0')) { | |
1661 | printk(KERN_WARNING PFX | |
1662 | "Bad option given for '%s'\n", | |
1663 | curr); | |
1664 | return -EINVAL; | |
1665 | } | |
1666 | return 1; | |
1667 | } | |
1668 | return 0; | |
1669 | } | |
1670 | ||
de5e2ddf ED |
1671 | static struct smi_info *smi_info_alloc(void) |
1672 | { | |
1673 | struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1674 | ||
1675 | if (info) { | |
1676 | spin_lock_init(&info->si_lock); | |
1677 | spin_lock_init(&info->msg_lock); | |
1678 | } | |
1679 | return info; | |
1680 | } | |
1681 | ||
b361e27b CM |
1682 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1683 | { | |
1684 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1685 | int rv; |
b361e27b CM |
1686 | char *next, *curr, *s, *n, *o; |
1687 | enum hotmod_op op; | |
1688 | enum si_type si_type; | |
1689 | int addr_space; | |
1690 | unsigned long addr; | |
1691 | int regspacing; | |
1692 | int regsize; | |
1693 | int regshift; | |
1694 | int irq; | |
1695 | int ipmb; | |
1696 | int ival; | |
1d5636cc | 1697 | int len; |
b361e27b CM |
1698 | struct smi_info *info; |
1699 | ||
1700 | if (!str) | |
1701 | return -ENOMEM; | |
1702 | ||
1703 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1704 | len = strlen(str); |
1705 | ival = len - 1; | |
b361e27b CM |
1706 | while ((ival >= 0) && isspace(str[ival])) { |
1707 | str[ival] = '\0'; | |
1708 | ival--; | |
1709 | } | |
1710 | ||
1711 | for (curr = str; curr; curr = next) { | |
1712 | regspacing = 1; | |
1713 | regsize = 1; | |
1714 | regshift = 0; | |
1715 | irq = 0; | |
2f95d513 | 1716 | ipmb = 0; /* Choose the default if not specified */ |
b361e27b CM |
1717 | |
1718 | next = strchr(curr, ':'); | |
1719 | if (next) { | |
1720 | *next = '\0'; | |
1721 | next++; | |
1722 | } | |
1723 | ||
1724 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1725 | if (rv) | |
1726 | break; | |
1727 | op = ival; | |
1728 | ||
1729 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1730 | if (rv) | |
1731 | break; | |
1732 | si_type = ival; | |
1733 | ||
1734 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1735 | if (rv) | |
1736 | break; | |
1737 | ||
1738 | s = strchr(curr, ','); | |
1739 | if (s) { | |
1740 | *s = '\0'; | |
1741 | s++; | |
1742 | } | |
1743 | addr = simple_strtoul(curr, &n, 0); | |
1744 | if ((*n != '\0') || (*curr == '\0')) { | |
1745 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1746 | " '%s'\n", curr); | |
1747 | break; | |
1748 | } | |
1749 | ||
1750 | while (s) { | |
1751 | curr = s; | |
1752 | s = strchr(curr, ','); | |
1753 | if (s) { | |
1754 | *s = '\0'; | |
1755 | s++; | |
1756 | } | |
1757 | o = strchr(curr, '='); | |
1758 | if (o) { | |
1759 | *o = '\0'; | |
1760 | o++; | |
1761 | } | |
1d5636cc CM |
1762 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1763 | if (rv < 0) | |
b361e27b | 1764 | goto out; |
1d5636cc CM |
1765 | else if (rv) |
1766 | continue; | |
1767 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1768 | if (rv < 0) | |
1769 | goto out; | |
1770 | else if (rv) | |
1771 | continue; | |
1772 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1773 | if (rv < 0) | |
1774 | goto out; | |
1775 | else if (rv) | |
1776 | continue; | |
1777 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1778 | if (rv < 0) | |
1779 | goto out; | |
1780 | else if (rv) | |
1781 | continue; | |
1782 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1783 | if (rv < 0) | |
1784 | goto out; | |
1785 | else if (rv) | |
1786 | continue; | |
1787 | ||
1788 | rv = -EINVAL; | |
1789 | printk(KERN_WARNING PFX | |
1790 | "Invalid hotmod option '%s'\n", | |
1791 | curr); | |
1792 | goto out; | |
b361e27b CM |
1793 | } |
1794 | ||
1795 | if (op == HM_ADD) { | |
de5e2ddf | 1796 | info = smi_info_alloc(); |
b361e27b CM |
1797 | if (!info) { |
1798 | rv = -ENOMEM; | |
1799 | goto out; | |
1800 | } | |
1801 | ||
5fedc4a2 | 1802 | info->addr_source = SI_HOTMOD; |
b361e27b CM |
1803 | info->si_type = si_type; |
1804 | info->io.addr_data = addr; | |
1805 | info->io.addr_type = addr_space; | |
1806 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1807 | info->io_setup = mem_setup; | |
1808 | else | |
1809 | info->io_setup = port_setup; | |
1810 | ||
1811 | info->io.addr = NULL; | |
1812 | info->io.regspacing = regspacing; | |
1813 | if (!info->io.regspacing) | |
1814 | info->io.regspacing = DEFAULT_REGSPACING; | |
1815 | info->io.regsize = regsize; | |
1816 | if (!info->io.regsize) | |
1817 | info->io.regsize = DEFAULT_REGSPACING; | |
1818 | info->io.regshift = regshift; | |
1819 | info->irq = irq; | |
1820 | if (info->irq) | |
1821 | info->irq_setup = std_irq_setup; | |
1822 | info->slave_addr = ipmb; | |
1823 | ||
7faefea6 | 1824 | if (!add_smi(info)) { |
2407d77a MG |
1825 | if (try_smi_init(info)) |
1826 | cleanup_one_si(info); | |
7faefea6 YL |
1827 | } else { |
1828 | kfree(info); | |
1829 | } | |
b361e27b CM |
1830 | } else { |
1831 | /* remove */ | |
1832 | struct smi_info *e, *tmp_e; | |
1833 | ||
1834 | mutex_lock(&smi_infos_lock); | |
1835 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1836 | if (e->io.addr_type != addr_space) | |
1837 | continue; | |
1838 | if (e->si_type != si_type) | |
1839 | continue; | |
1840 | if (e->io.addr_data == addr) | |
1841 | cleanup_one_si(e); | |
1842 | } | |
1843 | mutex_unlock(&smi_infos_lock); | |
1844 | } | |
1845 | } | |
1d5636cc | 1846 | rv = len; |
b361e27b CM |
1847 | out: |
1848 | kfree(str); | |
1849 | return rv; | |
1850 | } | |
b0defcdb | 1851 | |
a1e9c9dd | 1852 | static int __devinit hardcode_find_bmc(void) |
1da177e4 | 1853 | { |
a1e9c9dd | 1854 | int ret = -ENODEV; |
b0defcdb | 1855 | int i; |
1da177e4 LT |
1856 | struct smi_info *info; |
1857 | ||
b0defcdb CM |
1858 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1859 | if (!ports[i] && !addrs[i]) | |
1860 | continue; | |
1da177e4 | 1861 | |
de5e2ddf | 1862 | info = smi_info_alloc(); |
b0defcdb | 1863 | if (!info) |
a1e9c9dd | 1864 | return -ENOMEM; |
1da177e4 | 1865 | |
5fedc4a2 | 1866 | info->addr_source = SI_HARDCODED; |
279fbd0c | 1867 | printk(KERN_INFO PFX "probing via hardcoded address\n"); |
1da177e4 | 1868 | |
1d5636cc | 1869 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1870 | info->si_type = SI_KCS; |
1d5636cc | 1871 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1872 | info->si_type = SI_SMIC; |
1d5636cc | 1873 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1874 | info->si_type = SI_BT; |
1875 | } else { | |
279fbd0c | 1876 | printk(KERN_WARNING PFX "Interface type specified " |
b0defcdb CM |
1877 | "for interface %d, was invalid: %s\n", |
1878 | i, si_type[i]); | |
1879 | kfree(info); | |
1880 | continue; | |
1881 | } | |
1da177e4 | 1882 | |
b0defcdb CM |
1883 | if (ports[i]) { |
1884 | /* An I/O port */ | |
1885 | info->io_setup = port_setup; | |
1886 | info->io.addr_data = ports[i]; | |
1887 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1888 | } else if (addrs[i]) { | |
1889 | /* A memory port */ | |
1890 | info->io_setup = mem_setup; | |
1891 | info->io.addr_data = addrs[i]; | |
1892 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1893 | } else { | |
279fbd0c MS |
1894 | printk(KERN_WARNING PFX "Interface type specified " |
1895 | "for interface %d, but port and address were " | |
1896 | "not set or set to zero.\n", i); | |
b0defcdb CM |
1897 | kfree(info); |
1898 | continue; | |
1899 | } | |
1da177e4 | 1900 | |
b0defcdb CM |
1901 | info->io.addr = NULL; |
1902 | info->io.regspacing = regspacings[i]; | |
1903 | if (!info->io.regspacing) | |
1904 | info->io.regspacing = DEFAULT_REGSPACING; | |
1905 | info->io.regsize = regsizes[i]; | |
1906 | if (!info->io.regsize) | |
1907 | info->io.regsize = DEFAULT_REGSPACING; | |
1908 | info->io.regshift = regshifts[i]; | |
1909 | info->irq = irqs[i]; | |
1910 | if (info->irq) | |
1911 | info->irq_setup = std_irq_setup; | |
2f95d513 | 1912 | info->slave_addr = slave_addrs[i]; |
1da177e4 | 1913 | |
7faefea6 | 1914 | if (!add_smi(info)) { |
2407d77a MG |
1915 | if (try_smi_init(info)) |
1916 | cleanup_one_si(info); | |
a1e9c9dd | 1917 | ret = 0; |
7faefea6 YL |
1918 | } else { |
1919 | kfree(info); | |
1920 | } | |
b0defcdb | 1921 | } |
a1e9c9dd | 1922 | return ret; |
b0defcdb | 1923 | } |
1da177e4 | 1924 | |
8466361a | 1925 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1926 | |
1927 | #include <linux/acpi.h> | |
1928 | ||
c305e3d3 CM |
1929 | /* |
1930 | * Once we get an ACPI failure, we don't try any more, because we go | |
1931 | * through the tables sequentially. Once we don't find a table, there | |
1932 | * are no more. | |
1933 | */ | |
0c8204b3 | 1934 | static int acpi_failure; |
1da177e4 LT |
1935 | |
1936 | /* For GPE-type interrupts. */ | |
8b6cd8ad LM |
1937 | static u32 ipmi_acpi_gpe(acpi_handle gpe_device, |
1938 | u32 gpe_number, void *context) | |
1da177e4 LT |
1939 | { |
1940 | struct smi_info *smi_info = context; | |
1941 | unsigned long flags; | |
1942 | #ifdef DEBUG_TIMING | |
1943 | struct timeval t; | |
1944 | #endif | |
1945 | ||
1946 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1947 | ||
64959e2d | 1948 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1949 | |
1da177e4 LT |
1950 | #ifdef DEBUG_TIMING |
1951 | do_gettimeofday(&t); | |
1952 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1953 | #endif | |
1954 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1955 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1956 | ||
1957 | return ACPI_INTERRUPT_HANDLED; | |
1958 | } | |
1959 | ||
b0defcdb CM |
1960 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
1961 | { | |
1962 | if (!info->irq) | |
1963 | return; | |
1964 | ||
1965 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1966 | } | |
1967 | ||
1da177e4 LT |
1968 | static int acpi_gpe_irq_setup(struct smi_info *info) |
1969 | { | |
1970 | acpi_status status; | |
1971 | ||
b0defcdb | 1972 | if (!info->irq) |
1da177e4 LT |
1973 | return 0; |
1974 | ||
1975 | /* FIXME - is level triggered right? */ | |
1976 | status = acpi_install_gpe_handler(NULL, | |
1977 | info->irq, | |
1978 | ACPI_GPE_LEVEL_TRIGGERED, | |
1979 | &ipmi_acpi_gpe, | |
1980 | info); | |
1981 | if (status != AE_OK) { | |
279fbd0c MS |
1982 | dev_warn(info->dev, "%s unable to claim ACPI GPE %d," |
1983 | " running polled\n", DEVICE_NAME, info->irq); | |
1da177e4 LT |
1984 | info->irq = 0; |
1985 | return -EINVAL; | |
1986 | } else { | |
b0defcdb | 1987 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
279fbd0c | 1988 | dev_info(info->dev, "Using ACPI GPE %d\n", info->irq); |
1da177e4 LT |
1989 | return 0; |
1990 | } | |
1991 | } | |
1992 | ||
1da177e4 LT |
1993 | /* |
1994 | * Defined at | |
631dd1a8 | 1995 | * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf |
1da177e4 LT |
1996 | */ |
1997 | struct SPMITable { | |
1998 | s8 Signature[4]; | |
1999 | u32 Length; | |
2000 | u8 Revision; | |
2001 | u8 Checksum; | |
2002 | s8 OEMID[6]; | |
2003 | s8 OEMTableID[8]; | |
2004 | s8 OEMRevision[4]; | |
2005 | s8 CreatorID[4]; | |
2006 | s8 CreatorRevision[4]; | |
2007 | u8 InterfaceType; | |
2008 | u8 IPMIlegacy; | |
2009 | s16 SpecificationRevision; | |
2010 | ||
2011 | /* | |
2012 | * Bit 0 - SCI interrupt supported | |
2013 | * Bit 1 - I/O APIC/SAPIC | |
2014 | */ | |
2015 | u8 InterruptType; | |
2016 | ||
c305e3d3 CM |
2017 | /* |
2018 | * If bit 0 of InterruptType is set, then this is the SCI | |
2019 | * interrupt in the GPEx_STS register. | |
2020 | */ | |
1da177e4 LT |
2021 | u8 GPE; |
2022 | ||
2023 | s16 Reserved; | |
2024 | ||
c305e3d3 CM |
2025 | /* |
2026 | * If bit 1 of InterruptType is set, then this is the I/O | |
2027 | * APIC/SAPIC interrupt. | |
2028 | */ | |
1da177e4 LT |
2029 | u32 GlobalSystemInterrupt; |
2030 | ||
2031 | /* The actual register address. */ | |
2032 | struct acpi_generic_address addr; | |
2033 | ||
2034 | u8 UID[4]; | |
2035 | ||
2036 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
2037 | }; | |
2038 | ||
60ee6d5f | 2039 | static int __devinit try_init_spmi(struct SPMITable *spmi) |
1da177e4 LT |
2040 | { |
2041 | struct smi_info *info; | |
1da177e4 | 2042 | |
1da177e4 | 2043 | if (spmi->IPMIlegacy != 1) { |
279fbd0c MS |
2044 | printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy); |
2045 | return -ENODEV; | |
1da177e4 LT |
2046 | } |
2047 | ||
de5e2ddf | 2048 | info = smi_info_alloc(); |
b0defcdb | 2049 | if (!info) { |
279fbd0c | 2050 | printk(KERN_ERR PFX "Could not allocate SI data (3)\n"); |
b0defcdb CM |
2051 | return -ENOMEM; |
2052 | } | |
2053 | ||
5fedc4a2 | 2054 | info->addr_source = SI_SPMI; |
279fbd0c | 2055 | printk(KERN_INFO PFX "probing via SPMI\n"); |
1da177e4 | 2056 | |
1da177e4 | 2057 | /* Figure out the interface type. */ |
c305e3d3 | 2058 | switch (spmi->InterfaceType) { |
1da177e4 | 2059 | case 1: /* KCS */ |
b0defcdb | 2060 | info->si_type = SI_KCS; |
1da177e4 | 2061 | break; |
1da177e4 | 2062 | case 2: /* SMIC */ |
b0defcdb | 2063 | info->si_type = SI_SMIC; |
1da177e4 | 2064 | break; |
1da177e4 | 2065 | case 3: /* BT */ |
b0defcdb | 2066 | info->si_type = SI_BT; |
1da177e4 | 2067 | break; |
1da177e4 | 2068 | default: |
279fbd0c MS |
2069 | printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n", |
2070 | spmi->InterfaceType); | |
b0defcdb | 2071 | kfree(info); |
1da177e4 LT |
2072 | return -EIO; |
2073 | } | |
2074 | ||
1da177e4 LT |
2075 | if (spmi->InterruptType & 1) { |
2076 | /* We've got a GPE interrupt. */ | |
2077 | info->irq = spmi->GPE; | |
2078 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
2079 | } else if (spmi->InterruptType & 2) { |
2080 | /* We've got an APIC/SAPIC interrupt. */ | |
2081 | info->irq = spmi->GlobalSystemInterrupt; | |
2082 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
2083 | } else { |
2084 | /* Use the default interrupt setting. */ | |
2085 | info->irq = 0; | |
2086 | info->irq_setup = NULL; | |
2087 | } | |
2088 | ||
15a58ed1 | 2089 | if (spmi->addr.bit_width) { |
35bc37a0 | 2090 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 2091 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 2092 | } else { |
35bc37a0 CM |
2093 | info->io.regspacing = DEFAULT_REGSPACING; |
2094 | } | |
b0defcdb | 2095 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 2096 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 2097 | |
15a58ed1 | 2098 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 2099 | info->io_setup = mem_setup; |
8fe1425a | 2100 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
15a58ed1 | 2101 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 2102 | info->io_setup = port_setup; |
8fe1425a | 2103 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
2104 | } else { |
2105 | kfree(info); | |
279fbd0c | 2106 | printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n"); |
1da177e4 LT |
2107 | return -EIO; |
2108 | } | |
b0defcdb | 2109 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 2110 | |
7bb671e3 YL |
2111 | pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n", |
2112 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2113 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2114 | info->irq); | |
2115 | ||
7faefea6 YL |
2116 | if (add_smi(info)) |
2117 | kfree(info); | |
1da177e4 | 2118 | |
1da177e4 LT |
2119 | return 0; |
2120 | } | |
b0defcdb | 2121 | |
60ee6d5f | 2122 | static void __devinit spmi_find_bmc(void) |
b0defcdb CM |
2123 | { |
2124 | acpi_status status; | |
2125 | struct SPMITable *spmi; | |
2126 | int i; | |
2127 | ||
2128 | if (acpi_disabled) | |
2129 | return; | |
2130 | ||
2131 | if (acpi_failure) | |
2132 | return; | |
2133 | ||
2134 | for (i = 0; ; i++) { | |
15a58ed1 AS |
2135 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
2136 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
2137 | if (status != AE_OK) |
2138 | return; | |
2139 | ||
18a3e0bf | 2140 | try_init_spmi(spmi); |
b0defcdb CM |
2141 | } |
2142 | } | |
9e368fa0 BH |
2143 | |
2144 | static int __devinit ipmi_pnp_probe(struct pnp_dev *dev, | |
2145 | const struct pnp_device_id *dev_id) | |
2146 | { | |
2147 | struct acpi_device *acpi_dev; | |
2148 | struct smi_info *info; | |
a9e31765 | 2149 | struct resource *res, *res_second; |
9e368fa0 BH |
2150 | acpi_handle handle; |
2151 | acpi_status status; | |
2152 | unsigned long long tmp; | |
2153 | ||
2154 | acpi_dev = pnp_acpi_device(dev); | |
2155 | if (!acpi_dev) | |
2156 | return -ENODEV; | |
2157 | ||
de5e2ddf | 2158 | info = smi_info_alloc(); |
9e368fa0 BH |
2159 | if (!info) |
2160 | return -ENOMEM; | |
2161 | ||
5fedc4a2 | 2162 | info->addr_source = SI_ACPI; |
279fbd0c | 2163 | printk(KERN_INFO PFX "probing via ACPI\n"); |
9e368fa0 BH |
2164 | |
2165 | handle = acpi_dev->handle; | |
16f4232c | 2166 | info->addr_info.acpi_info.acpi_handle = handle; |
9e368fa0 BH |
2167 | |
2168 | /* _IFT tells us the interface type: KCS, BT, etc */ | |
2169 | status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp); | |
2170 | if (ACPI_FAILURE(status)) | |
2171 | goto err_free; | |
2172 | ||
2173 | switch (tmp) { | |
2174 | case 1: | |
2175 | info->si_type = SI_KCS; | |
2176 | break; | |
2177 | case 2: | |
2178 | info->si_type = SI_SMIC; | |
2179 | break; | |
2180 | case 3: | |
2181 | info->si_type = SI_BT; | |
2182 | break; | |
2183 | default: | |
279fbd0c | 2184 | dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp); |
9e368fa0 BH |
2185 | goto err_free; |
2186 | } | |
2187 | ||
279fbd0c MS |
2188 | res = pnp_get_resource(dev, IORESOURCE_IO, 0); |
2189 | if (res) { | |
9e368fa0 BH |
2190 | info->io_setup = port_setup; |
2191 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
9e368fa0 | 2192 | } else { |
279fbd0c MS |
2193 | res = pnp_get_resource(dev, IORESOURCE_MEM, 0); |
2194 | if (res) { | |
2195 | info->io_setup = mem_setup; | |
2196 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2197 | } | |
2198 | } | |
2199 | if (!res) { | |
9e368fa0 BH |
2200 | dev_err(&dev->dev, "no I/O or memory address\n"); |
2201 | goto err_free; | |
2202 | } | |
279fbd0c | 2203 | info->io.addr_data = res->start; |
9e368fa0 BH |
2204 | |
2205 | info->io.regspacing = DEFAULT_REGSPACING; | |
a9e31765 | 2206 | res_second = pnp_get_resource(dev, |
d9e1b6c4 YL |
2207 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? |
2208 | IORESOURCE_IO : IORESOURCE_MEM, | |
2209 | 1); | |
a9e31765 YL |
2210 | if (res_second) { |
2211 | if (res_second->start > info->io.addr_data) | |
2212 | info->io.regspacing = res_second->start - info->io.addr_data; | |
d9e1b6c4 | 2213 | } |
9e368fa0 BH |
2214 | info->io.regsize = DEFAULT_REGSPACING; |
2215 | info->io.regshift = 0; | |
2216 | ||
2217 | /* If _GPE exists, use it; otherwise use standard interrupts */ | |
2218 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); | |
2219 | if (ACPI_SUCCESS(status)) { | |
2220 | info->irq = tmp; | |
2221 | info->irq_setup = acpi_gpe_irq_setup; | |
2222 | } else if (pnp_irq_valid(dev, 0)) { | |
2223 | info->irq = pnp_irq(dev, 0); | |
2224 | info->irq_setup = std_irq_setup; | |
2225 | } | |
2226 | ||
8c8eae27 | 2227 | info->dev = &dev->dev; |
9e368fa0 BH |
2228 | pnp_set_drvdata(dev, info); |
2229 | ||
279fbd0c MS |
2230 | dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n", |
2231 | res, info->io.regsize, info->io.regspacing, | |
2232 | info->irq); | |
2233 | ||
7faefea6 YL |
2234 | if (add_smi(info)) |
2235 | goto err_free; | |
2236 | ||
2237 | return 0; | |
9e368fa0 BH |
2238 | |
2239 | err_free: | |
2240 | kfree(info); | |
2241 | return -EINVAL; | |
2242 | } | |
2243 | ||
2244 | static void __devexit ipmi_pnp_remove(struct pnp_dev *dev) | |
2245 | { | |
2246 | struct smi_info *info = pnp_get_drvdata(dev); | |
2247 | ||
2248 | cleanup_one_si(info); | |
2249 | } | |
2250 | ||
2251 | static const struct pnp_device_id pnp_dev_table[] = { | |
2252 | {"IPI0001", 0}, | |
2253 | {"", 0}, | |
2254 | }; | |
2255 | ||
2256 | static struct pnp_driver ipmi_pnp_driver = { | |
2257 | .name = DEVICE_NAME, | |
2258 | .probe = ipmi_pnp_probe, | |
2259 | .remove = __devexit_p(ipmi_pnp_remove), | |
2260 | .id_table = pnp_dev_table, | |
2261 | }; | |
1da177e4 LT |
2262 | #endif |
2263 | ||
a9fad4cc | 2264 | #ifdef CONFIG_DMI |
c305e3d3 | 2265 | struct dmi_ipmi_data { |
1da177e4 LT |
2266 | u8 type; |
2267 | u8 addr_space; | |
2268 | unsigned long base_addr; | |
2269 | u8 irq; | |
2270 | u8 offset; | |
2271 | u8 slave_addr; | |
b0defcdb | 2272 | }; |
1da177e4 | 2273 | |
1855256c | 2274 | static int __devinit decode_dmi(const struct dmi_header *dm, |
b0defcdb | 2275 | struct dmi_ipmi_data *dmi) |
1da177e4 | 2276 | { |
1855256c | 2277 | const u8 *data = (const u8 *)dm; |
1da177e4 LT |
2278 | unsigned long base_addr; |
2279 | u8 reg_spacing; | |
b224cd3a | 2280 | u8 len = dm->length; |
1da177e4 | 2281 | |
b0defcdb | 2282 | dmi->type = data[4]; |
1da177e4 LT |
2283 | |
2284 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
2285 | if (len >= 0x11) { | |
2286 | if (base_addr & 1) { | |
2287 | /* I/O */ | |
2288 | base_addr &= 0xFFFE; | |
b0defcdb | 2289 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
c305e3d3 | 2290 | } else |
1da177e4 | 2291 | /* Memory */ |
b0defcdb | 2292 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
c305e3d3 | 2293 | |
1da177e4 LT |
2294 | /* If bit 4 of byte 0x10 is set, then the lsb for the address |
2295 | is odd. */ | |
b0defcdb | 2296 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 2297 | |
b0defcdb | 2298 | dmi->irq = data[0x11]; |
1da177e4 LT |
2299 | |
2300 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 2301 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
c305e3d3 | 2302 | switch (reg_spacing) { |
1da177e4 | 2303 | case 0x00: /* Byte boundaries */ |
b0defcdb | 2304 | dmi->offset = 1; |
1da177e4 LT |
2305 | break; |
2306 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 2307 | dmi->offset = 4; |
1da177e4 LT |
2308 | break; |
2309 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 2310 | dmi->offset = 16; |
1da177e4 LT |
2311 | break; |
2312 | default: | |
2313 | /* Some other interface, just ignore it. */ | |
2314 | return -EIO; | |
2315 | } | |
2316 | } else { | |
2317 | /* Old DMI spec. */ | |
c305e3d3 CM |
2318 | /* |
2319 | * Note that technically, the lower bit of the base | |
92068801 CM |
2320 | * address should be 1 if the address is I/O and 0 if |
2321 | * the address is in memory. So many systems get that | |
2322 | * wrong (and all that I have seen are I/O) so we just | |
2323 | * ignore that bit and assume I/O. Systems that use | |
c305e3d3 CM |
2324 | * memory should use the newer spec, anyway. |
2325 | */ | |
b0defcdb CM |
2326 | dmi->base_addr = base_addr & 0xfffe; |
2327 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
2328 | dmi->offset = 1; | |
1da177e4 LT |
2329 | } |
2330 | ||
b0defcdb | 2331 | dmi->slave_addr = data[6]; |
1da177e4 | 2332 | |
b0defcdb | 2333 | return 0; |
1da177e4 LT |
2334 | } |
2335 | ||
60ee6d5f | 2336 | static void __devinit try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 2337 | { |
b0defcdb | 2338 | struct smi_info *info; |
1da177e4 | 2339 | |
de5e2ddf | 2340 | info = smi_info_alloc(); |
b0defcdb | 2341 | if (!info) { |
279fbd0c | 2342 | printk(KERN_ERR PFX "Could not allocate SI data\n"); |
b0defcdb | 2343 | return; |
1da177e4 | 2344 | } |
1da177e4 | 2345 | |
5fedc4a2 | 2346 | info->addr_source = SI_SMBIOS; |
279fbd0c | 2347 | printk(KERN_INFO PFX "probing via SMBIOS\n"); |
1da177e4 | 2348 | |
e8b33617 | 2349 | switch (ipmi_data->type) { |
b0defcdb CM |
2350 | case 0x01: /* KCS */ |
2351 | info->si_type = SI_KCS; | |
2352 | break; | |
2353 | case 0x02: /* SMIC */ | |
2354 | info->si_type = SI_SMIC; | |
2355 | break; | |
2356 | case 0x03: /* BT */ | |
2357 | info->si_type = SI_BT; | |
2358 | break; | |
2359 | default: | |
80cd6920 | 2360 | kfree(info); |
b0defcdb | 2361 | return; |
1da177e4 | 2362 | } |
1da177e4 | 2363 | |
b0defcdb CM |
2364 | switch (ipmi_data->addr_space) { |
2365 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2366 | info->io_setup = mem_setup; |
b0defcdb CM |
2367 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2368 | break; | |
2369 | ||
2370 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2371 | info->io_setup = port_setup; |
b0defcdb CM |
2372 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2373 | break; | |
2374 | ||
2375 | default: | |
1da177e4 | 2376 | kfree(info); |
279fbd0c | 2377 | printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n", |
b0defcdb CM |
2378 | ipmi_data->addr_space); |
2379 | return; | |
1da177e4 | 2380 | } |
b0defcdb | 2381 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2382 | |
b0defcdb CM |
2383 | info->io.regspacing = ipmi_data->offset; |
2384 | if (!info->io.regspacing) | |
1da177e4 LT |
2385 | info->io.regspacing = DEFAULT_REGSPACING; |
2386 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2387 | info->io.regshift = 0; |
1da177e4 LT |
2388 | |
2389 | info->slave_addr = ipmi_data->slave_addr; | |
2390 | ||
b0defcdb CM |
2391 | info->irq = ipmi_data->irq; |
2392 | if (info->irq) | |
2393 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2394 | |
7bb671e3 YL |
2395 | pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n", |
2396 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2397 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2398 | info->irq); | |
2399 | ||
7faefea6 YL |
2400 | if (add_smi(info)) |
2401 | kfree(info); | |
b0defcdb | 2402 | } |
1da177e4 | 2403 | |
b0defcdb CM |
2404 | static void __devinit dmi_find_bmc(void) |
2405 | { | |
1855256c | 2406 | const struct dmi_device *dev = NULL; |
b0defcdb CM |
2407 | struct dmi_ipmi_data data; |
2408 | int rv; | |
2409 | ||
2410 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2411 | memset(&data, 0, sizeof(data)); |
1855256c JG |
2412 | rv = decode_dmi((const struct dmi_header *) dev->device_data, |
2413 | &data); | |
b0defcdb CM |
2414 | if (!rv) |
2415 | try_init_dmi(&data); | |
2416 | } | |
1da177e4 | 2417 | } |
a9fad4cc | 2418 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2419 | |
2420 | #ifdef CONFIG_PCI | |
2421 | ||
b0defcdb CM |
2422 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2423 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2424 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2425 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2426 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2427 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2428 | ||
1da177e4 LT |
2429 | #define PCI_HP_VENDOR_ID 0x103C |
2430 | #define PCI_MMC_DEVICE_ID 0x121A | |
2431 | #define PCI_MMC_ADDR_CW 0x10 | |
2432 | ||
b0defcdb CM |
2433 | static void ipmi_pci_cleanup(struct smi_info *info) |
2434 | { | |
2435 | struct pci_dev *pdev = info->addr_source_data; | |
2436 | ||
2437 | pci_disable_device(pdev); | |
2438 | } | |
1da177e4 | 2439 | |
b0defcdb CM |
2440 | static int __devinit ipmi_pci_probe(struct pci_dev *pdev, |
2441 | const struct pci_device_id *ent) | |
1da177e4 | 2442 | { |
b0defcdb CM |
2443 | int rv; |
2444 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2445 | struct smi_info *info; | |
1da177e4 | 2446 | |
de5e2ddf | 2447 | info = smi_info_alloc(); |
b0defcdb | 2448 | if (!info) |
1cd441f9 | 2449 | return -ENOMEM; |
1da177e4 | 2450 | |
5fedc4a2 | 2451 | info->addr_source = SI_PCI; |
279fbd0c | 2452 | dev_info(&pdev->dev, "probing via PCI"); |
1da177e4 | 2453 | |
b0defcdb CM |
2454 | switch (class_type) { |
2455 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2456 | info->si_type = SI_SMIC; | |
2457 | break; | |
1da177e4 | 2458 | |
b0defcdb CM |
2459 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2460 | info->si_type = SI_KCS; | |
2461 | break; | |
2462 | ||
2463 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2464 | info->si_type = SI_BT; | |
2465 | break; | |
2466 | ||
2467 | default: | |
2468 | kfree(info); | |
279fbd0c | 2469 | dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type); |
1cd441f9 | 2470 | return -ENOMEM; |
1da177e4 LT |
2471 | } |
2472 | ||
b0defcdb CM |
2473 | rv = pci_enable_device(pdev); |
2474 | if (rv) { | |
279fbd0c | 2475 | dev_err(&pdev->dev, "couldn't enable PCI device\n"); |
b0defcdb CM |
2476 | kfree(info); |
2477 | return rv; | |
1da177e4 LT |
2478 | } |
2479 | ||
b0defcdb CM |
2480 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2481 | info->addr_source_data = pdev; | |
1da177e4 | 2482 | |
b0defcdb CM |
2483 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2484 | info->io_setup = port_setup; | |
2485 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2486 | } else { | |
2487 | info->io_setup = mem_setup; | |
2488 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2489 | } |
b0defcdb | 2490 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2491 | |
b0defcdb | 2492 | info->io.regspacing = DEFAULT_REGSPACING; |
1da177e4 | 2493 | info->io.regsize = DEFAULT_REGSPACING; |
b0defcdb | 2494 | info->io.regshift = 0; |
1da177e4 | 2495 | |
b0defcdb CM |
2496 | info->irq = pdev->irq; |
2497 | if (info->irq) | |
2498 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2499 | |
50c812b2 | 2500 | info->dev = &pdev->dev; |
fca3b747 | 2501 | pci_set_drvdata(pdev, info); |
50c812b2 | 2502 | |
279fbd0c MS |
2503 | dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n", |
2504 | &pdev->resource[0], info->io.regsize, info->io.regspacing, | |
2505 | info->irq); | |
2506 | ||
7faefea6 YL |
2507 | if (add_smi(info)) |
2508 | kfree(info); | |
2509 | ||
2510 | return 0; | |
b0defcdb | 2511 | } |
1da177e4 | 2512 | |
b0defcdb CM |
2513 | static void __devexit ipmi_pci_remove(struct pci_dev *pdev) |
2514 | { | |
fca3b747 CM |
2515 | struct smi_info *info = pci_get_drvdata(pdev); |
2516 | cleanup_one_si(info); | |
b0defcdb | 2517 | } |
1da177e4 | 2518 | |
b0defcdb CM |
2519 | #ifdef CONFIG_PM |
2520 | static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
2521 | { | |
1da177e4 LT |
2522 | return 0; |
2523 | } | |
1da177e4 | 2524 | |
b0defcdb | 2525 | static int ipmi_pci_resume(struct pci_dev *pdev) |
1da177e4 | 2526 | { |
b0defcdb CM |
2527 | return 0; |
2528 | } | |
1da177e4 | 2529 | #endif |
1da177e4 | 2530 | |
b0defcdb CM |
2531 | static struct pci_device_id ipmi_pci_devices[] = { |
2532 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
248bdd5e KC |
2533 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, |
2534 | { 0, } | |
b0defcdb CM |
2535 | }; |
2536 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2537 | ||
2538 | static struct pci_driver ipmi_pci_driver = { | |
c305e3d3 CM |
2539 | .name = DEVICE_NAME, |
2540 | .id_table = ipmi_pci_devices, | |
2541 | .probe = ipmi_pci_probe, | |
2542 | .remove = __devexit_p(ipmi_pci_remove), | |
b0defcdb | 2543 | #ifdef CONFIG_PM |
c305e3d3 CM |
2544 | .suspend = ipmi_pci_suspend, |
2545 | .resume = ipmi_pci_resume, | |
b0defcdb CM |
2546 | #endif |
2547 | }; | |
2548 | #endif /* CONFIG_PCI */ | |
1da177e4 | 2549 | |
b1608d69 | 2550 | static struct of_device_id ipmi_match[]; |
a1e9c9dd | 2551 | static int __devinit ipmi_probe(struct platform_device *dev) |
dba9b4f6 | 2552 | { |
a1e9c9dd | 2553 | #ifdef CONFIG_OF |
b1608d69 | 2554 | const struct of_device_id *match; |
dba9b4f6 CM |
2555 | struct smi_info *info; |
2556 | struct resource resource; | |
da81c3b9 | 2557 | const __be32 *regsize, *regspacing, *regshift; |
61c7a080 | 2558 | struct device_node *np = dev->dev.of_node; |
dba9b4f6 CM |
2559 | int ret; |
2560 | int proplen; | |
2561 | ||
279fbd0c | 2562 | dev_info(&dev->dev, "probing via device tree\n"); |
dba9b4f6 | 2563 | |
b1608d69 GL |
2564 | match = of_match_device(ipmi_match, &dev->dev); |
2565 | if (!match) | |
a1e9c9dd RH |
2566 | return -EINVAL; |
2567 | ||
dba9b4f6 CM |
2568 | ret = of_address_to_resource(np, 0, &resource); |
2569 | if (ret) { | |
2570 | dev_warn(&dev->dev, PFX "invalid address from OF\n"); | |
2571 | return ret; | |
2572 | } | |
2573 | ||
9c25099d | 2574 | regsize = of_get_property(np, "reg-size", &proplen); |
dba9b4f6 CM |
2575 | if (regsize && proplen != 4) { |
2576 | dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); | |
2577 | return -EINVAL; | |
2578 | } | |
2579 | ||
9c25099d | 2580 | regspacing = of_get_property(np, "reg-spacing", &proplen); |
dba9b4f6 CM |
2581 | if (regspacing && proplen != 4) { |
2582 | dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); | |
2583 | return -EINVAL; | |
2584 | } | |
2585 | ||
9c25099d | 2586 | regshift = of_get_property(np, "reg-shift", &proplen); |
dba9b4f6 CM |
2587 | if (regshift && proplen != 4) { |
2588 | dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); | |
2589 | return -EINVAL; | |
2590 | } | |
2591 | ||
de5e2ddf | 2592 | info = smi_info_alloc(); |
dba9b4f6 CM |
2593 | |
2594 | if (!info) { | |
2595 | dev_err(&dev->dev, | |
279fbd0c | 2596 | "could not allocate memory for OF probe\n"); |
dba9b4f6 CM |
2597 | return -ENOMEM; |
2598 | } | |
2599 | ||
b1608d69 | 2600 | info->si_type = (enum si_type) match->data; |
5fedc4a2 | 2601 | info->addr_source = SI_DEVICETREE; |
dba9b4f6 CM |
2602 | info->irq_setup = std_irq_setup; |
2603 | ||
3b7ec117 NC |
2604 | if (resource.flags & IORESOURCE_IO) { |
2605 | info->io_setup = port_setup; | |
2606 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2607 | } else { | |
2608 | info->io_setup = mem_setup; | |
2609 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2610 | } | |
2611 | ||
dba9b4f6 CM |
2612 | info->io.addr_data = resource.start; |
2613 | ||
da81c3b9 RH |
2614 | info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE; |
2615 | info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING; | |
2616 | info->io.regshift = regshift ? be32_to_cpup(regshift) : 0; | |
dba9b4f6 | 2617 | |
61c7a080 | 2618 | info->irq = irq_of_parse_and_map(dev->dev.of_node, 0); |
dba9b4f6 CM |
2619 | info->dev = &dev->dev; |
2620 | ||
279fbd0c | 2621 | dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n", |
dba9b4f6 CM |
2622 | info->io.addr_data, info->io.regsize, info->io.regspacing, |
2623 | info->irq); | |
2624 | ||
9de33df4 | 2625 | dev_set_drvdata(&dev->dev, info); |
dba9b4f6 | 2626 | |
7faefea6 YL |
2627 | if (add_smi(info)) { |
2628 | kfree(info); | |
2629 | return -EBUSY; | |
2630 | } | |
a1e9c9dd | 2631 | #endif |
7faefea6 | 2632 | return 0; |
dba9b4f6 CM |
2633 | } |
2634 | ||
a1e9c9dd | 2635 | static int __devexit ipmi_remove(struct platform_device *dev) |
dba9b4f6 | 2636 | { |
a1e9c9dd | 2637 | #ifdef CONFIG_OF |
9de33df4 | 2638 | cleanup_one_si(dev_get_drvdata(&dev->dev)); |
a1e9c9dd | 2639 | #endif |
dba9b4f6 CM |
2640 | return 0; |
2641 | } | |
2642 | ||
2643 | static struct of_device_id ipmi_match[] = | |
2644 | { | |
c305e3d3 CM |
2645 | { .type = "ipmi", .compatible = "ipmi-kcs", |
2646 | .data = (void *)(unsigned long) SI_KCS }, | |
2647 | { .type = "ipmi", .compatible = "ipmi-smic", | |
2648 | .data = (void *)(unsigned long) SI_SMIC }, | |
2649 | { .type = "ipmi", .compatible = "ipmi-bt", | |
2650 | .data = (void *)(unsigned long) SI_BT }, | |
dba9b4f6 CM |
2651 | {}, |
2652 | }; | |
2653 | ||
a1e9c9dd | 2654 | static struct platform_driver ipmi_driver = { |
4018294b | 2655 | .driver = { |
a1e9c9dd | 2656 | .name = DEVICE_NAME, |
4018294b GL |
2657 | .owner = THIS_MODULE, |
2658 | .of_match_table = ipmi_match, | |
2659 | }, | |
a1e9c9dd RH |
2660 | .probe = ipmi_probe, |
2661 | .remove = __devexit_p(ipmi_remove), | |
dba9b4f6 | 2662 | }; |
dba9b4f6 | 2663 | |
40112ae7 | 2664 | static int wait_for_msg_done(struct smi_info *smi_info) |
1da177e4 | 2665 | { |
50c812b2 | 2666 | enum si_sm_result smi_result; |
1da177e4 LT |
2667 | |
2668 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 2669 | for (;;) { |
c3e7e791 CM |
2670 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2671 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2672 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2673 | smi_result = smi_info->handlers->event( |
2674 | smi_info->si_sm, 100); | |
c305e3d3 | 2675 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
2676 | smi_result = smi_info->handlers->event( |
2677 | smi_info->si_sm, 0); | |
c305e3d3 | 2678 | } else |
1da177e4 LT |
2679 | break; |
2680 | } | |
40112ae7 | 2681 | if (smi_result == SI_SM_HOSED) |
c305e3d3 CM |
2682 | /* |
2683 | * We couldn't get the state machine to run, so whatever's at | |
2684 | * the port is probably not an IPMI SMI interface. | |
2685 | */ | |
40112ae7 CM |
2686 | return -ENODEV; |
2687 | ||
2688 | return 0; | |
2689 | } | |
2690 | ||
2691 | static int try_get_dev_id(struct smi_info *smi_info) | |
2692 | { | |
2693 | unsigned char msg[2]; | |
2694 | unsigned char *resp; | |
2695 | unsigned long resp_len; | |
2696 | int rv = 0; | |
2697 | ||
2698 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2699 | if (!resp) | |
2700 | return -ENOMEM; | |
2701 | ||
2702 | /* | |
2703 | * Do a Get Device ID command, since it comes back with some | |
2704 | * useful info. | |
2705 | */ | |
2706 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2707 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2708 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2709 | ||
2710 | rv = wait_for_msg_done(smi_info); | |
2711 | if (rv) | |
1da177e4 | 2712 | goto out; |
1da177e4 | 2713 | |
1da177e4 LT |
2714 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, |
2715 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 2716 | |
d8c98618 CM |
2717 | /* Check and record info from the get device id, in case we need it. */ |
2718 | rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); | |
1da177e4 LT |
2719 | |
2720 | out: | |
2721 | kfree(resp); | |
2722 | return rv; | |
2723 | } | |
2724 | ||
40112ae7 CM |
2725 | static int try_enable_event_buffer(struct smi_info *smi_info) |
2726 | { | |
2727 | unsigned char msg[3]; | |
2728 | unsigned char *resp; | |
2729 | unsigned long resp_len; | |
2730 | int rv = 0; | |
2731 | ||
2732 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2733 | if (!resp) | |
2734 | return -ENOMEM; | |
2735 | ||
2736 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2737 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
2738 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2739 | ||
2740 | rv = wait_for_msg_done(smi_info); | |
2741 | if (rv) { | |
279fbd0c MS |
2742 | printk(KERN_WARNING PFX "Error getting response from get" |
2743 | " global enables command, the event buffer is not" | |
40112ae7 CM |
2744 | " enabled.\n"); |
2745 | goto out; | |
2746 | } | |
2747 | ||
2748 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2749 | resp, IPMI_MAX_MSG_LENGTH); | |
2750 | ||
2751 | if (resp_len < 4 || | |
2752 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2753 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
2754 | resp[2] != 0) { | |
279fbd0c MS |
2755 | printk(KERN_WARNING PFX "Invalid return from get global" |
2756 | " enables command, cannot enable the event buffer.\n"); | |
40112ae7 CM |
2757 | rv = -EINVAL; |
2758 | goto out; | |
2759 | } | |
2760 | ||
2761 | if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) | |
2762 | /* buffer is already enabled, nothing to do. */ | |
2763 | goto out; | |
2764 | ||
2765 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2766 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
2767 | msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; | |
2768 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
2769 | ||
2770 | rv = wait_for_msg_done(smi_info); | |
2771 | if (rv) { | |
279fbd0c MS |
2772 | printk(KERN_WARNING PFX "Error getting response from set" |
2773 | " global, enables command, the event buffer is not" | |
40112ae7 CM |
2774 | " enabled.\n"); |
2775 | goto out; | |
2776 | } | |
2777 | ||
2778 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2779 | resp, IPMI_MAX_MSG_LENGTH); | |
2780 | ||
2781 | if (resp_len < 3 || | |
2782 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2783 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
279fbd0c MS |
2784 | printk(KERN_WARNING PFX "Invalid return from get global," |
2785 | "enables command, not enable the event buffer.\n"); | |
40112ae7 CM |
2786 | rv = -EINVAL; |
2787 | goto out; | |
2788 | } | |
2789 | ||
2790 | if (resp[2] != 0) | |
2791 | /* | |
2792 | * An error when setting the event buffer bit means | |
2793 | * that the event buffer is not supported. | |
2794 | */ | |
2795 | rv = -ENOENT; | |
2796 | out: | |
2797 | kfree(resp); | |
2798 | return rv; | |
2799 | } | |
2800 | ||
07412736 | 2801 | static int smi_type_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2802 | { |
07412736 | 2803 | struct smi_info *smi = m->private; |
1da177e4 | 2804 | |
07412736 | 2805 | return seq_printf(m, "%s\n", si_to_str[smi->si_type]); |
1da177e4 LT |
2806 | } |
2807 | ||
07412736 | 2808 | static int smi_type_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2809 | { |
07412736 AD |
2810 | return single_open(file, smi_type_proc_show, PDE(inode)->data); |
2811 | } | |
2812 | ||
2813 | static const struct file_operations smi_type_proc_ops = { | |
2814 | .open = smi_type_proc_open, | |
2815 | .read = seq_read, | |
2816 | .llseek = seq_lseek, | |
2817 | .release = single_release, | |
2818 | }; | |
2819 | ||
2820 | static int smi_si_stats_proc_show(struct seq_file *m, void *v) | |
2821 | { | |
2822 | struct smi_info *smi = m->private; | |
1da177e4 | 2823 | |
07412736 | 2824 | seq_printf(m, "interrupts_enabled: %d\n", |
b0defcdb | 2825 | smi->irq && !smi->interrupt_disabled); |
07412736 | 2826 | seq_printf(m, "short_timeouts: %u\n", |
64959e2d | 2827 | smi_get_stat(smi, short_timeouts)); |
07412736 | 2828 | seq_printf(m, "long_timeouts: %u\n", |
64959e2d | 2829 | smi_get_stat(smi, long_timeouts)); |
07412736 | 2830 | seq_printf(m, "idles: %u\n", |
64959e2d | 2831 | smi_get_stat(smi, idles)); |
07412736 | 2832 | seq_printf(m, "interrupts: %u\n", |
64959e2d | 2833 | smi_get_stat(smi, interrupts)); |
07412736 | 2834 | seq_printf(m, "attentions: %u\n", |
64959e2d | 2835 | smi_get_stat(smi, attentions)); |
07412736 | 2836 | seq_printf(m, "flag_fetches: %u\n", |
64959e2d | 2837 | smi_get_stat(smi, flag_fetches)); |
07412736 | 2838 | seq_printf(m, "hosed_count: %u\n", |
64959e2d | 2839 | smi_get_stat(smi, hosed_count)); |
07412736 | 2840 | seq_printf(m, "complete_transactions: %u\n", |
64959e2d | 2841 | smi_get_stat(smi, complete_transactions)); |
07412736 | 2842 | seq_printf(m, "events: %u\n", |
64959e2d | 2843 | smi_get_stat(smi, events)); |
07412736 | 2844 | seq_printf(m, "watchdog_pretimeouts: %u\n", |
64959e2d | 2845 | smi_get_stat(smi, watchdog_pretimeouts)); |
07412736 | 2846 | seq_printf(m, "incoming_messages: %u\n", |
64959e2d | 2847 | smi_get_stat(smi, incoming_messages)); |
07412736 AD |
2848 | return 0; |
2849 | } | |
1da177e4 | 2850 | |
07412736 AD |
2851 | static int smi_si_stats_proc_open(struct inode *inode, struct file *file) |
2852 | { | |
2853 | return single_open(file, smi_si_stats_proc_show, PDE(inode)->data); | |
b361e27b CM |
2854 | } |
2855 | ||
07412736 AD |
2856 | static const struct file_operations smi_si_stats_proc_ops = { |
2857 | .open = smi_si_stats_proc_open, | |
2858 | .read = seq_read, | |
2859 | .llseek = seq_lseek, | |
2860 | .release = single_release, | |
2861 | }; | |
2862 | ||
2863 | static int smi_params_proc_show(struct seq_file *m, void *v) | |
b361e27b | 2864 | { |
07412736 | 2865 | struct smi_info *smi = m->private; |
b361e27b | 2866 | |
07412736 | 2867 | return seq_printf(m, |
b361e27b CM |
2868 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", |
2869 | si_to_str[smi->si_type], | |
2870 | addr_space_to_str[smi->io.addr_type], | |
2871 | smi->io.addr_data, | |
2872 | smi->io.regspacing, | |
2873 | smi->io.regsize, | |
2874 | smi->io.regshift, | |
2875 | smi->irq, | |
2876 | smi->slave_addr); | |
1da177e4 LT |
2877 | } |
2878 | ||
07412736 AD |
2879 | static int smi_params_proc_open(struct inode *inode, struct file *file) |
2880 | { | |
2881 | return single_open(file, smi_params_proc_show, PDE(inode)->data); | |
2882 | } | |
2883 | ||
2884 | static const struct file_operations smi_params_proc_ops = { | |
2885 | .open = smi_params_proc_open, | |
2886 | .read = seq_read, | |
2887 | .llseek = seq_lseek, | |
2888 | .release = single_release, | |
2889 | }; | |
2890 | ||
3ae0e0f9 CM |
2891 | /* |
2892 | * oem_data_avail_to_receive_msg_avail | |
2893 | * @info - smi_info structure with msg_flags set | |
2894 | * | |
2895 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
2896 | * Returns 1 indicating need to re-run handle_flags(). | |
2897 | */ | |
2898 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
2899 | { | |
e8b33617 | 2900 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 2901 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
2902 | return 1; |
2903 | } | |
2904 | ||
2905 | /* | |
2906 | * setup_dell_poweredge_oem_data_handler | |
2907 | * @info - smi_info.device_id must be populated | |
2908 | * | |
2909 | * Systems that match, but have firmware version < 1.40 may assert | |
2910 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
2911 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
2912 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
2913 | * as RECEIVE_MSG_AVAIL instead. | |
2914 | * | |
2915 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
2916 | * assert the OEM[012] bits, and if it did, the driver would have to | |
2917 | * change to handle that properly, we don't actually check for the | |
2918 | * firmware version. | |
2919 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
2920 | * Device Revision = 0x80 | |
2921 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
2922 | * Firmware Revision2 = 0x40 BCD encoded | |
2923 | * IPMI Version = 0x51 IPMI 1.5 | |
2924 | * Manufacturer ID = A2 02 00 Dell IANA | |
2925 | * | |
d5a2b89a CM |
2926 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
2927 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
2928 | * | |
3ae0e0f9 CM |
2929 | */ |
2930 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
2931 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
2932 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 2933 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
2934 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
2935 | { | |
2936 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2937 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
2938 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
2939 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 2940 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
2941 | smi_info->oem_data_avail_handler = |
2942 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
2943 | } else if (ipmi_version_major(id) < 1 || |
2944 | (ipmi_version_major(id) == 1 && | |
2945 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
2946 | smi_info->oem_data_avail_handler = |
2947 | oem_data_avail_to_receive_msg_avail; | |
2948 | } | |
3ae0e0f9 CM |
2949 | } |
2950 | } | |
2951 | ||
ea94027b CM |
2952 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
2953 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
2954 | { | |
2955 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
2956 | ||
25985edc | 2957 | /* Make it a response */ |
ea94027b CM |
2958 | msg->rsp[0] = msg->data[0] | 4; |
2959 | msg->rsp[1] = msg->data[1]; | |
2960 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
2961 | msg->rsp_size = 3; | |
2962 | smi_info->curr_msg = NULL; | |
2963 | deliver_recv_msg(smi_info, msg); | |
2964 | } | |
2965 | ||
2966 | /* | |
2967 | * dell_poweredge_bt_xaction_handler | |
2968 | * @info - smi_info.device_id must be populated | |
2969 | * | |
2970 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
2971 | * not respond to a Get SDR command if the length of the data | |
2972 | * requested is exactly 0x3A, which leads to command timeouts and no | |
2973 | * data returned. This intercepts such commands, and causes userspace | |
2974 | * callers to try again with a different-sized buffer, which succeeds. | |
2975 | */ | |
2976 | ||
2977 | #define STORAGE_NETFN 0x0A | |
2978 | #define STORAGE_CMD_GET_SDR 0x23 | |
2979 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
2980 | unsigned long unused, | |
2981 | void *in) | |
2982 | { | |
2983 | struct smi_info *smi_info = in; | |
2984 | unsigned char *data = smi_info->curr_msg->data; | |
2985 | unsigned int size = smi_info->curr_msg->data_size; | |
2986 | if (size >= 8 && | |
2987 | (data[0]>>2) == STORAGE_NETFN && | |
2988 | data[1] == STORAGE_CMD_GET_SDR && | |
2989 | data[7] == 0x3A) { | |
2990 | return_hosed_msg_badsize(smi_info); | |
2991 | return NOTIFY_STOP; | |
2992 | } | |
2993 | return NOTIFY_DONE; | |
2994 | } | |
2995 | ||
2996 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
2997 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
2998 | }; | |
2999 | ||
3000 | /* | |
3001 | * setup_dell_poweredge_bt_xaction_handler | |
3002 | * @info - smi_info.device_id must be filled in already | |
3003 | * | |
3004 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
3005 | * when we know what function to use there. | |
3006 | */ | |
3007 | static void | |
3008 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
3009 | { | |
3010 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3011 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
3012 | smi_info->si_type == SI_BT) |
3013 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
3014 | } | |
3015 | ||
3ae0e0f9 CM |
3016 | /* |
3017 | * setup_oem_data_handler | |
3018 | * @info - smi_info.device_id must be filled in already | |
3019 | * | |
3020 | * Fills in smi_info.device_id.oem_data_available_handler | |
3021 | * when we know what function to use there. | |
3022 | */ | |
3023 | ||
3024 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
3025 | { | |
3026 | setup_dell_poweredge_oem_data_handler(smi_info); | |
3027 | } | |
3028 | ||
ea94027b CM |
3029 | static void setup_xaction_handlers(struct smi_info *smi_info) |
3030 | { | |
3031 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
3032 | } | |
3033 | ||
a9a2c44f CM |
3034 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
3035 | { | |
453823ba | 3036 | if (smi_info->intf) { |
c305e3d3 CM |
3037 | /* |
3038 | * The timer and thread are only running if the | |
3039 | * interface has been started up and registered. | |
3040 | */ | |
453823ba CM |
3041 | if (smi_info->thread != NULL) |
3042 | kthread_stop(smi_info->thread); | |
3043 | del_timer_sync(&smi_info->si_timer); | |
3044 | } | |
a9a2c44f CM |
3045 | } |
3046 | ||
7420884c | 3047 | static __devinitdata struct ipmi_default_vals |
b0defcdb CM |
3048 | { |
3049 | int type; | |
3050 | int port; | |
7420884c | 3051 | } ipmi_defaults[] = |
b0defcdb CM |
3052 | { |
3053 | { .type = SI_KCS, .port = 0xca2 }, | |
3054 | { .type = SI_SMIC, .port = 0xca9 }, | |
3055 | { .type = SI_BT, .port = 0xe4 }, | |
3056 | { .port = 0 } | |
3057 | }; | |
3058 | ||
60ee6d5f | 3059 | static void __devinit default_find_bmc(void) |
b0defcdb CM |
3060 | { |
3061 | struct smi_info *info; | |
3062 | int i; | |
3063 | ||
3064 | for (i = 0; ; i++) { | |
3065 | if (!ipmi_defaults[i].port) | |
3066 | break; | |
68e1ee62 | 3067 | #ifdef CONFIG_PPC |
4ff31d77 CK |
3068 | if (check_legacy_ioport(ipmi_defaults[i].port)) |
3069 | continue; | |
3070 | #endif | |
de5e2ddf | 3071 | info = smi_info_alloc(); |
a09f4855 AM |
3072 | if (!info) |
3073 | return; | |
4ff31d77 | 3074 | |
5fedc4a2 | 3075 | info->addr_source = SI_DEFAULT; |
b0defcdb CM |
3076 | |
3077 | info->si_type = ipmi_defaults[i].type; | |
3078 | info->io_setup = port_setup; | |
3079 | info->io.addr_data = ipmi_defaults[i].port; | |
3080 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
3081 | ||
3082 | info->io.addr = NULL; | |
3083 | info->io.regspacing = DEFAULT_REGSPACING; | |
3084 | info->io.regsize = DEFAULT_REGSPACING; | |
3085 | info->io.regshift = 0; | |
3086 | ||
2407d77a MG |
3087 | if (add_smi(info) == 0) { |
3088 | if ((try_smi_init(info)) == 0) { | |
3089 | /* Found one... */ | |
279fbd0c | 3090 | printk(KERN_INFO PFX "Found default %s" |
2407d77a MG |
3091 | " state machine at %s address 0x%lx\n", |
3092 | si_to_str[info->si_type], | |
3093 | addr_space_to_str[info->io.addr_type], | |
3094 | info->io.addr_data); | |
3095 | } else | |
3096 | cleanup_one_si(info); | |
7faefea6 YL |
3097 | } else { |
3098 | kfree(info); | |
b0defcdb CM |
3099 | } |
3100 | } | |
3101 | } | |
3102 | ||
3103 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 3104 | { |
b0defcdb | 3105 | struct smi_info *e; |
1da177e4 | 3106 | |
b0defcdb CM |
3107 | list_for_each_entry(e, &smi_infos, link) { |
3108 | if (e->io.addr_type != info->io.addr_type) | |
3109 | continue; | |
3110 | if (e->io.addr_data == info->io.addr_data) | |
3111 | return 0; | |
3112 | } | |
1da177e4 | 3113 | |
b0defcdb CM |
3114 | return 1; |
3115 | } | |
1da177e4 | 3116 | |
2407d77a | 3117 | static int add_smi(struct smi_info *new_smi) |
b0defcdb | 3118 | { |
2407d77a | 3119 | int rv = 0; |
b0defcdb | 3120 | |
279fbd0c | 3121 | printk(KERN_INFO PFX "Adding %s-specified %s state machine", |
2407d77a MG |
3122 | ipmi_addr_src_to_str[new_smi->addr_source], |
3123 | si_to_str[new_smi->si_type]); | |
d6dfd131 | 3124 | mutex_lock(&smi_infos_lock); |
b0defcdb | 3125 | if (!is_new_interface(new_smi)) { |
7bb671e3 | 3126 | printk(KERN_CONT " duplicate interface\n"); |
b0defcdb CM |
3127 | rv = -EBUSY; |
3128 | goto out_err; | |
3129 | } | |
1da177e4 | 3130 | |
2407d77a MG |
3131 | printk(KERN_CONT "\n"); |
3132 | ||
1da177e4 LT |
3133 | /* So we know not to free it unless we have allocated one. */ |
3134 | new_smi->intf = NULL; | |
3135 | new_smi->si_sm = NULL; | |
3136 | new_smi->handlers = NULL; | |
3137 | ||
2407d77a MG |
3138 | list_add_tail(&new_smi->link, &smi_infos); |
3139 | ||
3140 | out_err: | |
3141 | mutex_unlock(&smi_infos_lock); | |
3142 | return rv; | |
3143 | } | |
3144 | ||
3145 | static int try_smi_init(struct smi_info *new_smi) | |
3146 | { | |
3147 | int rv = 0; | |
3148 | int i; | |
3149 | ||
279fbd0c | 3150 | printk(KERN_INFO PFX "Trying %s-specified %s state" |
2407d77a MG |
3151 | " machine at %s address 0x%lx, slave address 0x%x," |
3152 | " irq %d\n", | |
3153 | ipmi_addr_src_to_str[new_smi->addr_source], | |
3154 | si_to_str[new_smi->si_type], | |
3155 | addr_space_to_str[new_smi->io.addr_type], | |
3156 | new_smi->io.addr_data, | |
3157 | new_smi->slave_addr, new_smi->irq); | |
3158 | ||
b0defcdb CM |
3159 | switch (new_smi->si_type) { |
3160 | case SI_KCS: | |
1da177e4 | 3161 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
3162 | break; |
3163 | ||
3164 | case SI_SMIC: | |
1da177e4 | 3165 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
3166 | break; |
3167 | ||
3168 | case SI_BT: | |
1da177e4 | 3169 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
3170 | break; |
3171 | ||
3172 | default: | |
1da177e4 LT |
3173 | /* No support for anything else yet. */ |
3174 | rv = -EIO; | |
3175 | goto out_err; | |
3176 | } | |
3177 | ||
3178 | /* Allocate the state machine's data and initialize it. */ | |
3179 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 3180 | if (!new_smi->si_sm) { |
279fbd0c MS |
3181 | printk(KERN_ERR PFX |
3182 | "Could not allocate state machine memory\n"); | |
1da177e4 LT |
3183 | rv = -ENOMEM; |
3184 | goto out_err; | |
3185 | } | |
3186 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
3187 | &new_smi->io); | |
3188 | ||
3189 | /* Now that we know the I/O size, we can set up the I/O. */ | |
3190 | rv = new_smi->io_setup(new_smi); | |
3191 | if (rv) { | |
279fbd0c | 3192 | printk(KERN_ERR PFX "Could not set up I/O space\n"); |
1da177e4 LT |
3193 | goto out_err; |
3194 | } | |
3195 | ||
1da177e4 LT |
3196 | /* Do low-level detection first. */ |
3197 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb | 3198 | if (new_smi->addr_source) |
279fbd0c | 3199 | printk(KERN_INFO PFX "Interface detection failed\n"); |
1da177e4 LT |
3200 | rv = -ENODEV; |
3201 | goto out_err; | |
3202 | } | |
3203 | ||
c305e3d3 CM |
3204 | /* |
3205 | * Attempt a get device id command. If it fails, we probably | |
3206 | * don't have a BMC here. | |
3207 | */ | |
1da177e4 | 3208 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
3209 | if (rv) { |
3210 | if (new_smi->addr_source) | |
279fbd0c | 3211 | printk(KERN_INFO PFX "There appears to be no BMC" |
b0defcdb | 3212 | " at this location\n"); |
1da177e4 | 3213 | goto out_err; |
b0defcdb | 3214 | } |
1da177e4 | 3215 | |
3ae0e0f9 | 3216 | setup_oem_data_handler(new_smi); |
ea94027b | 3217 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 3218 | |
1da177e4 LT |
3219 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); |
3220 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
3221 | new_smi->curr_msg = NULL; | |
3222 | atomic_set(&new_smi->req_events, 0); | |
3223 | new_smi->run_to_completion = 0; | |
64959e2d CM |
3224 | for (i = 0; i < SI_NUM_STATS; i++) |
3225 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 | 3226 | |
ea4078ca | 3227 | new_smi->interrupt_disabled = 1; |
a9a2c44f | 3228 | atomic_set(&new_smi->stop_operation, 0); |
b0defcdb CM |
3229 | new_smi->intf_num = smi_num; |
3230 | smi_num++; | |
1da177e4 | 3231 | |
40112ae7 CM |
3232 | rv = try_enable_event_buffer(new_smi); |
3233 | if (rv == 0) | |
3234 | new_smi->has_event_buffer = 1; | |
3235 | ||
c305e3d3 CM |
3236 | /* |
3237 | * Start clearing the flags before we enable interrupts or the | |
3238 | * timer to avoid racing with the timer. | |
3239 | */ | |
1da177e4 LT |
3240 | start_clear_flags(new_smi); |
3241 | /* IRQ is defined to be set when non-zero. */ | |
3242 | if (new_smi->irq) | |
3243 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
3244 | ||
50c812b2 | 3245 | if (!new_smi->dev) { |
c305e3d3 CM |
3246 | /* |
3247 | * If we don't already have a device from something | |
3248 | * else (like PCI), then register a new one. | |
3249 | */ | |
50c812b2 CM |
3250 | new_smi->pdev = platform_device_alloc("ipmi_si", |
3251 | new_smi->intf_num); | |
8b32b5d0 | 3252 | if (!new_smi->pdev) { |
279fbd0c MS |
3253 | printk(KERN_ERR PFX |
3254 | "Unable to allocate platform device\n"); | |
453823ba | 3255 | goto out_err; |
50c812b2 CM |
3256 | } |
3257 | new_smi->dev = &new_smi->pdev->dev; | |
fe2d5ffc | 3258 | new_smi->dev->driver = &ipmi_driver.driver; |
50c812b2 | 3259 | |
b48f5457 | 3260 | rv = platform_device_add(new_smi->pdev); |
50c812b2 | 3261 | if (rv) { |
279fbd0c MS |
3262 | printk(KERN_ERR PFX |
3263 | "Unable to register system interface device:" | |
50c812b2 CM |
3264 | " %d\n", |
3265 | rv); | |
453823ba | 3266 | goto out_err; |
50c812b2 CM |
3267 | } |
3268 | new_smi->dev_registered = 1; | |
3269 | } | |
3270 | ||
1da177e4 LT |
3271 | rv = ipmi_register_smi(&handlers, |
3272 | new_smi, | |
50c812b2 CM |
3273 | &new_smi->device_id, |
3274 | new_smi->dev, | |
759643b8 | 3275 | "bmc", |
453823ba | 3276 | new_smi->slave_addr); |
1da177e4 | 3277 | if (rv) { |
279fbd0c MS |
3278 | dev_err(new_smi->dev, "Unable to register device: error %d\n", |
3279 | rv); | |
1da177e4 LT |
3280 | goto out_err_stop_timer; |
3281 | } | |
3282 | ||
3283 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
07412736 | 3284 | &smi_type_proc_ops, |
99b76233 | 3285 | new_smi); |
1da177e4 | 3286 | if (rv) { |
279fbd0c | 3287 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3288 | goto out_err_stop_timer; |
3289 | } | |
3290 | ||
3291 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
07412736 | 3292 | &smi_si_stats_proc_ops, |
99b76233 | 3293 | new_smi); |
1da177e4 | 3294 | if (rv) { |
279fbd0c | 3295 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3296 | goto out_err_stop_timer; |
3297 | } | |
3298 | ||
b361e27b | 3299 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
07412736 | 3300 | &smi_params_proc_ops, |
99b76233 | 3301 | new_smi); |
b361e27b | 3302 | if (rv) { |
279fbd0c | 3303 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
b361e27b CM |
3304 | goto out_err_stop_timer; |
3305 | } | |
3306 | ||
279fbd0c MS |
3307 | dev_info(new_smi->dev, "IPMI %s interface initialized\n", |
3308 | si_to_str[new_smi->si_type]); | |
1da177e4 LT |
3309 | |
3310 | return 0; | |
3311 | ||
3312 | out_err_stop_timer: | |
a9a2c44f CM |
3313 | atomic_inc(&new_smi->stop_operation); |
3314 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
3315 | |
3316 | out_err: | |
2407d77a MG |
3317 | new_smi->interrupt_disabled = 1; |
3318 | ||
3319 | if (new_smi->intf) { | |
1da177e4 | 3320 | ipmi_unregister_smi(new_smi->intf); |
2407d77a MG |
3321 | new_smi->intf = NULL; |
3322 | } | |
1da177e4 | 3323 | |
2407d77a | 3324 | if (new_smi->irq_cleanup) { |
b0defcdb | 3325 | new_smi->irq_cleanup(new_smi); |
2407d77a MG |
3326 | new_smi->irq_cleanup = NULL; |
3327 | } | |
1da177e4 | 3328 | |
c305e3d3 CM |
3329 | /* |
3330 | * Wait until we know that we are out of any interrupt | |
3331 | * handlers might have been running before we freed the | |
3332 | * interrupt. | |
3333 | */ | |
fbd568a3 | 3334 | synchronize_sched(); |
1da177e4 LT |
3335 | |
3336 | if (new_smi->si_sm) { | |
3337 | if (new_smi->handlers) | |
3338 | new_smi->handlers->cleanup(new_smi->si_sm); | |
3339 | kfree(new_smi->si_sm); | |
2407d77a | 3340 | new_smi->si_sm = NULL; |
1da177e4 | 3341 | } |
2407d77a | 3342 | if (new_smi->addr_source_cleanup) { |
b0defcdb | 3343 | new_smi->addr_source_cleanup(new_smi); |
2407d77a MG |
3344 | new_smi->addr_source_cleanup = NULL; |
3345 | } | |
3346 | if (new_smi->io_cleanup) { | |
7767e126 | 3347 | new_smi->io_cleanup(new_smi); |
2407d77a MG |
3348 | new_smi->io_cleanup = NULL; |
3349 | } | |
1da177e4 | 3350 | |
2407d77a | 3351 | if (new_smi->dev_registered) { |
50c812b2 | 3352 | platform_device_unregister(new_smi->pdev); |
2407d77a MG |
3353 | new_smi->dev_registered = 0; |
3354 | } | |
b0defcdb | 3355 | |
1da177e4 LT |
3356 | return rv; |
3357 | } | |
3358 | ||
60ee6d5f | 3359 | static int __devinit init_ipmi_si(void) |
1da177e4 | 3360 | { |
1da177e4 LT |
3361 | int i; |
3362 | char *str; | |
50c812b2 | 3363 | int rv; |
2407d77a | 3364 | struct smi_info *e; |
06ee4594 | 3365 | enum ipmi_addr_src type = SI_INVALID; |
1da177e4 LT |
3366 | |
3367 | if (initialized) | |
3368 | return 0; | |
3369 | initialized = 1; | |
3370 | ||
a1e9c9dd | 3371 | rv = platform_driver_register(&ipmi_driver); |
50c812b2 | 3372 | if (rv) { |
279fbd0c | 3373 | printk(KERN_ERR PFX "Unable to register driver: %d\n", rv); |
50c812b2 CM |
3374 | return rv; |
3375 | } | |
3376 | ||
3377 | ||
1da177e4 LT |
3378 | /* Parse out the si_type string into its components. */ |
3379 | str = si_type_str; | |
3380 | if (*str != '\0') { | |
e8b33617 | 3381 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
3382 | si_type[i] = str; |
3383 | str = strchr(str, ','); | |
3384 | if (str) { | |
3385 | *str = '\0'; | |
3386 | str++; | |
3387 | } else { | |
3388 | break; | |
3389 | } | |
3390 | } | |
3391 | } | |
3392 | ||
1fdd75bd | 3393 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 3394 | |
d8cc5267 | 3395 | /* If the user gave us a device, they presumably want us to use it */ |
a1e9c9dd | 3396 | if (!hardcode_find_bmc()) |
d8cc5267 | 3397 | return 0; |
d8cc5267 | 3398 | |
b0defcdb | 3399 | #ifdef CONFIG_PCI |
168b35a7 | 3400 | rv = pci_register_driver(&ipmi_pci_driver); |
c305e3d3 | 3401 | if (rv) |
279fbd0c | 3402 | printk(KERN_ERR PFX "Unable to register PCI driver: %d\n", rv); |
56480287 MG |
3403 | else |
3404 | pci_registered = 1; | |
b0defcdb CM |
3405 | #endif |
3406 | ||
754d4531 MG |
3407 | #ifdef CONFIG_ACPI |
3408 | pnp_register_driver(&ipmi_pnp_driver); | |
561f8182 | 3409 | pnp_registered = 1; |
754d4531 MG |
3410 | #endif |
3411 | ||
3412 | #ifdef CONFIG_DMI | |
3413 | dmi_find_bmc(); | |
3414 | #endif | |
3415 | ||
3416 | #ifdef CONFIG_ACPI | |
3417 | spmi_find_bmc(); | |
3418 | #endif | |
3419 | ||
06ee4594 MG |
3420 | /* We prefer devices with interrupts, but in the case of a machine |
3421 | with multiple BMCs we assume that there will be several instances | |
3422 | of a given type so if we succeed in registering a type then also | |
3423 | try to register everything else of the same type */ | |
d8cc5267 | 3424 | |
2407d77a MG |
3425 | mutex_lock(&smi_infos_lock); |
3426 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 MG |
3427 | /* Try to register a device if it has an IRQ and we either |
3428 | haven't successfully registered a device yet or this | |
3429 | device has the same type as one we successfully registered */ | |
3430 | if (e->irq && (!type || e->addr_source == type)) { | |
d8cc5267 | 3431 | if (!try_smi_init(e)) { |
06ee4594 | 3432 | type = e->addr_source; |
d8cc5267 MG |
3433 | } |
3434 | } | |
3435 | } | |
3436 | ||
06ee4594 MG |
3437 | /* type will only have been set if we successfully registered an si */ |
3438 | if (type) { | |
3439 | mutex_unlock(&smi_infos_lock); | |
3440 | return 0; | |
3441 | } | |
3442 | ||
d8cc5267 MG |
3443 | /* Fall back to the preferred device */ |
3444 | ||
3445 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 | 3446 | if (!e->irq && (!type || e->addr_source == type)) { |
d8cc5267 | 3447 | if (!try_smi_init(e)) { |
06ee4594 | 3448 | type = e->addr_source; |
d8cc5267 MG |
3449 | } |
3450 | } | |
2407d77a MG |
3451 | } |
3452 | mutex_unlock(&smi_infos_lock); | |
3453 | ||
06ee4594 MG |
3454 | if (type) |
3455 | return 0; | |
3456 | ||
b0defcdb | 3457 | if (si_trydefaults) { |
d6dfd131 | 3458 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3459 | if (list_empty(&smi_infos)) { |
3460 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 3461 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3462 | default_find_bmc(); |
2407d77a | 3463 | } else |
d6dfd131 | 3464 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3465 | } |
3466 | ||
d6dfd131 | 3467 | mutex_lock(&smi_infos_lock); |
b361e27b | 3468 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 3469 | mutex_unlock(&smi_infos_lock); |
d2478521 | 3470 | cleanup_ipmi_si(); |
279fbd0c MS |
3471 | printk(KERN_WARNING PFX |
3472 | "Unable to find any System Interface(s)\n"); | |
1da177e4 | 3473 | return -ENODEV; |
b0defcdb | 3474 | } else { |
d6dfd131 | 3475 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3476 | return 0; |
1da177e4 | 3477 | } |
1da177e4 LT |
3478 | } |
3479 | module_init(init_ipmi_si); | |
3480 | ||
b361e27b | 3481 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 | 3482 | { |
2407d77a | 3483 | int rv = 0; |
1da177e4 LT |
3484 | unsigned long flags; |
3485 | ||
b0defcdb | 3486 | if (!to_clean) |
1da177e4 LT |
3487 | return; |
3488 | ||
b0defcdb CM |
3489 | list_del(&to_clean->link); |
3490 | ||
ee6cd5f8 | 3491 | /* Tell the driver that we are shutting down. */ |
a9a2c44f | 3492 | atomic_inc(&to_clean->stop_operation); |
b0defcdb | 3493 | |
c305e3d3 CM |
3494 | /* |
3495 | * Make sure the timer and thread are stopped and will not run | |
3496 | * again. | |
3497 | */ | |
a9a2c44f | 3498 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 3499 | |
c305e3d3 CM |
3500 | /* |
3501 | * Timeouts are stopped, now make sure the interrupts are off | |
3502 | * for the device. A little tricky with locks to make sure | |
3503 | * there are no races. | |
3504 | */ | |
ee6cd5f8 CM |
3505 | spin_lock_irqsave(&to_clean->si_lock, flags); |
3506 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3507 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3508 | poll(to_clean); | |
3509 | schedule_timeout_uninterruptible(1); | |
3510 | spin_lock_irqsave(&to_clean->si_lock, flags); | |
3511 | } | |
3512 | disable_si_irq(to_clean); | |
3513 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3514 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3515 | poll(to_clean); | |
3516 | schedule_timeout_uninterruptible(1); | |
3517 | } | |
3518 | ||
3519 | /* Clean up interrupts and make sure that everything is done. */ | |
3520 | if (to_clean->irq_cleanup) | |
3521 | to_clean->irq_cleanup(to_clean); | |
e8b33617 | 3522 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 3523 | poll(to_clean); |
da4cd8df | 3524 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
3525 | } |
3526 | ||
2407d77a MG |
3527 | if (to_clean->intf) |
3528 | rv = ipmi_unregister_smi(to_clean->intf); | |
3529 | ||
1da177e4 | 3530 | if (rv) { |
279fbd0c | 3531 | printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n", |
1da177e4 LT |
3532 | rv); |
3533 | } | |
3534 | ||
2407d77a MG |
3535 | if (to_clean->handlers) |
3536 | to_clean->handlers->cleanup(to_clean->si_sm); | |
1da177e4 LT |
3537 | |
3538 | kfree(to_clean->si_sm); | |
3539 | ||
b0defcdb CM |
3540 | if (to_clean->addr_source_cleanup) |
3541 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
3542 | if (to_clean->io_cleanup) |
3543 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
3544 | |
3545 | if (to_clean->dev_registered) | |
3546 | platform_device_unregister(to_clean->pdev); | |
3547 | ||
3548 | kfree(to_clean); | |
1da177e4 LT |
3549 | } |
3550 | ||
0dcf334c | 3551 | static void cleanup_ipmi_si(void) |
1da177e4 | 3552 | { |
b0defcdb | 3553 | struct smi_info *e, *tmp_e; |
1da177e4 | 3554 | |
b0defcdb | 3555 | if (!initialized) |
1da177e4 LT |
3556 | return; |
3557 | ||
b0defcdb | 3558 | #ifdef CONFIG_PCI |
56480287 MG |
3559 | if (pci_registered) |
3560 | pci_unregister_driver(&ipmi_pci_driver); | |
b0defcdb | 3561 | #endif |
27d0567a | 3562 | #ifdef CONFIG_ACPI |
561f8182 YL |
3563 | if (pnp_registered) |
3564 | pnp_unregister_driver(&ipmi_pnp_driver); | |
9e368fa0 | 3565 | #endif |
b0defcdb | 3566 | |
a1e9c9dd | 3567 | platform_driver_unregister(&ipmi_driver); |
dba9b4f6 | 3568 | |
d6dfd131 | 3569 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3570 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
3571 | cleanup_one_si(e); | |
d6dfd131 | 3572 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3573 | } |
3574 | module_exit(cleanup_ipmi_si); | |
3575 | ||
3576 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 3577 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
3578 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
3579 | " system interfaces."); |