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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ipmi_si.c | |
3 | * | |
4 | * The interface to the IPMI driver for the system interfaces (KCS, SMIC, | |
5 | * BT). | |
6 | * | |
7 | * Author: MontaVista Software, Inc. | |
8 | * Corey Minyard <minyard@mvista.com> | |
9 | * source@mvista.com | |
10 | * | |
11 | * Copyright 2002 MontaVista Software Inc. | |
dba9b4f6 | 12 | * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com> |
1da177e4 LT |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify it | |
15 | * under the terms of the GNU General Public License as published by the | |
16 | * Free Software Foundation; either version 2 of the License, or (at your | |
17 | * option) any later version. | |
18 | * | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
21 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
22 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
25 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
26 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
27 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
28 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
29 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License along | |
32 | * with this program; if not, write to the Free Software Foundation, Inc., | |
33 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * This file holds the "policy" for the interface to the SMI state | |
38 | * machine. It does the configuration, handles timers and interrupts, | |
39 | * and drives the real SMI state machine. | |
40 | */ | |
41 | ||
1da177e4 LT |
42 | #include <linux/module.h> |
43 | #include <linux/moduleparam.h> | |
44 | #include <asm/system.h> | |
45 | #include <linux/sched.h> | |
46 | #include <linux/timer.h> | |
47 | #include <linux/errno.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/ioport.h> | |
ea94027b | 54 | #include <linux/notifier.h> |
b0defcdb | 55 | #include <linux/mutex.h> |
e9a705a0 | 56 | #include <linux/kthread.h> |
1da177e4 | 57 | #include <asm/irq.h> |
1da177e4 LT |
58 | #include <linux/interrupt.h> |
59 | #include <linux/rcupdate.h> | |
60 | #include <linux/ipmi_smi.h> | |
61 | #include <asm/io.h> | |
62 | #include "ipmi_si_sm.h" | |
63 | #include <linux/init.h> | |
b224cd3a | 64 | #include <linux/dmi.h> |
b361e27b CM |
65 | #include <linux/string.h> |
66 | #include <linux/ctype.h> | |
9e368fa0 | 67 | #include <linux/pnp.h> |
b361e27b | 68 | |
dba9b4f6 | 69 | #ifdef CONFIG_PPC_OF |
11c675ce SR |
70 | #include <linux/of_device.h> |
71 | #include <linux/of_platform.h> | |
dba9b4f6 CM |
72 | #endif |
73 | ||
b361e27b | 74 | #define PFX "ipmi_si: " |
1da177e4 LT |
75 | |
76 | /* Measure times between events in the driver. */ | |
77 | #undef DEBUG_TIMING | |
78 | ||
79 | /* Call every 10 ms. */ | |
80 | #define SI_TIMEOUT_TIME_USEC 10000 | |
81 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
82 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
83 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
c305e3d3 | 84 | short timeout */ |
1da177e4 LT |
85 | |
86 | enum si_intf_state { | |
87 | SI_NORMAL, | |
88 | SI_GETTING_FLAGS, | |
89 | SI_GETTING_EVENTS, | |
90 | SI_CLEARING_FLAGS, | |
91 | SI_CLEARING_FLAGS_THEN_SET_IRQ, | |
92 | SI_GETTING_MESSAGES, | |
93 | SI_ENABLE_INTERRUPTS1, | |
ee6cd5f8 CM |
94 | SI_ENABLE_INTERRUPTS2, |
95 | SI_DISABLE_INTERRUPTS1, | |
96 | SI_DISABLE_INTERRUPTS2 | |
1da177e4 LT |
97 | /* FIXME - add watchdog stuff. */ |
98 | }; | |
99 | ||
9dbf68f9 CM |
100 | /* Some BT-specific defines we need here. */ |
101 | #define IPMI_BT_INTMASK_REG 2 | |
102 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
103 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
104 | ||
1da177e4 LT |
105 | enum si_type { |
106 | SI_KCS, SI_SMIC, SI_BT | |
107 | }; | |
b361e27b | 108 | static char *si_to_str[] = { "kcs", "smic", "bt" }; |
1da177e4 | 109 | |
5fedc4a2 MG |
110 | enum ipmi_addr_src { |
111 | SI_INVALID = 0, SI_HOTMOD, SI_HARDCODED, SI_SPMI, SI_ACPI, SI_SMBIOS, | |
112 | SI_PCI, SI_DEVICETREE, SI_DEFAULT | |
113 | }; | |
114 | static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI", | |
115 | "ACPI", "SMBIOS", "PCI", | |
116 | "device-tree", "default" }; | |
117 | ||
50c812b2 CM |
118 | #define DEVICE_NAME "ipmi_si" |
119 | ||
fe2d5ffc DW |
120 | static struct platform_driver ipmi_driver = { |
121 | .driver = { | |
122 | .name = DEVICE_NAME, | |
123 | .bus = &platform_bus_type | |
124 | } | |
50c812b2 | 125 | }; |
3ae0e0f9 | 126 | |
64959e2d CM |
127 | |
128 | /* | |
129 | * Indexes into stats[] in smi_info below. | |
130 | */ | |
ba8ff1c6 CM |
131 | enum si_stat_indexes { |
132 | /* | |
133 | * Number of times the driver requested a timer while an operation | |
134 | * was in progress. | |
135 | */ | |
136 | SI_STAT_short_timeouts = 0, | |
137 | ||
138 | /* | |
139 | * Number of times the driver requested a timer while nothing was in | |
140 | * progress. | |
141 | */ | |
142 | SI_STAT_long_timeouts, | |
143 | ||
144 | /* Number of times the interface was idle while being polled. */ | |
145 | SI_STAT_idles, | |
146 | ||
147 | /* Number of interrupts the driver handled. */ | |
148 | SI_STAT_interrupts, | |
149 | ||
150 | /* Number of time the driver got an ATTN from the hardware. */ | |
151 | SI_STAT_attentions, | |
64959e2d | 152 | |
ba8ff1c6 CM |
153 | /* Number of times the driver requested flags from the hardware. */ |
154 | SI_STAT_flag_fetches, | |
155 | ||
156 | /* Number of times the hardware didn't follow the state machine. */ | |
157 | SI_STAT_hosed_count, | |
158 | ||
159 | /* Number of completed messages. */ | |
160 | SI_STAT_complete_transactions, | |
161 | ||
162 | /* Number of IPMI events received from the hardware. */ | |
163 | SI_STAT_events, | |
164 | ||
165 | /* Number of watchdog pretimeouts. */ | |
166 | SI_STAT_watchdog_pretimeouts, | |
167 | ||
168 | /* Number of asyncronous messages received. */ | |
169 | SI_STAT_incoming_messages, | |
170 | ||
171 | ||
172 | /* This *must* remain last, add new values above this. */ | |
173 | SI_NUM_STATS | |
174 | }; | |
64959e2d | 175 | |
c305e3d3 | 176 | struct smi_info { |
a9a2c44f | 177 | int intf_num; |
1da177e4 LT |
178 | ipmi_smi_t intf; |
179 | struct si_sm_data *si_sm; | |
180 | struct si_sm_handlers *handlers; | |
181 | enum si_type si_type; | |
182 | spinlock_t si_lock; | |
183 | spinlock_t msg_lock; | |
184 | struct list_head xmit_msgs; | |
185 | struct list_head hp_xmit_msgs; | |
186 | struct ipmi_smi_msg *curr_msg; | |
187 | enum si_intf_state si_state; | |
188 | ||
c305e3d3 CM |
189 | /* |
190 | * Used to handle the various types of I/O that can occur with | |
191 | * IPMI | |
192 | */ | |
1da177e4 LT |
193 | struct si_sm_io io; |
194 | int (*io_setup)(struct smi_info *info); | |
195 | void (*io_cleanup)(struct smi_info *info); | |
196 | int (*irq_setup)(struct smi_info *info); | |
197 | void (*irq_cleanup)(struct smi_info *info); | |
198 | unsigned int io_size; | |
5fedc4a2 | 199 | enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */ |
b0defcdb CM |
200 | void (*addr_source_cleanup)(struct smi_info *info); |
201 | void *addr_source_data; | |
1da177e4 | 202 | |
c305e3d3 CM |
203 | /* |
204 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
205 | * when handle_flags() needs to be re-run or 0 indicating it | |
206 | * set si_state itself. | |
207 | */ | |
3ae0e0f9 CM |
208 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
209 | ||
c305e3d3 CM |
210 | /* |
211 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
212 | * is set to hold the flags until we are done handling everything | |
213 | * from the flags. | |
214 | */ | |
1da177e4 LT |
215 | #define RECEIVE_MSG_AVAIL 0x01 |
216 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
217 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
218 | #define OEM0_DATA_AVAIL 0x20 |
219 | #define OEM1_DATA_AVAIL 0x40 | |
220 | #define OEM2_DATA_AVAIL 0x80 | |
221 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
222 | OEM1_DATA_AVAIL | \ |
223 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
224 | unsigned char msg_flags; |
225 | ||
40112ae7 CM |
226 | /* Does the BMC have an event buffer? */ |
227 | char has_event_buffer; | |
228 | ||
c305e3d3 CM |
229 | /* |
230 | * If set to true, this will request events the next time the | |
231 | * state machine is idle. | |
232 | */ | |
1da177e4 LT |
233 | atomic_t req_events; |
234 | ||
c305e3d3 CM |
235 | /* |
236 | * If true, run the state machine to completion on every send | |
237 | * call. Generally used after a panic to make sure stuff goes | |
238 | * out. | |
239 | */ | |
1da177e4 LT |
240 | int run_to_completion; |
241 | ||
242 | /* The I/O port of an SI interface. */ | |
243 | int port; | |
244 | ||
c305e3d3 CM |
245 | /* |
246 | * The space between start addresses of the two ports. For | |
247 | * instance, if the first port is 0xca2 and the spacing is 4, then | |
248 | * the second port is 0xca6. | |
249 | */ | |
1da177e4 LT |
250 | unsigned int spacing; |
251 | ||
252 | /* zero if no irq; */ | |
253 | int irq; | |
254 | ||
255 | /* The timer for this si. */ | |
256 | struct timer_list si_timer; | |
257 | ||
258 | /* The time (in jiffies) the last timeout occurred at. */ | |
259 | unsigned long last_timeout_jiffies; | |
260 | ||
261 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 262 | atomic_t stop_operation; |
1da177e4 | 263 | |
c305e3d3 CM |
264 | /* |
265 | * The driver will disable interrupts when it gets into a | |
266 | * situation where it cannot handle messages due to lack of | |
267 | * memory. Once that situation clears up, it will re-enable | |
268 | * interrupts. | |
269 | */ | |
1da177e4 LT |
270 | int interrupt_disabled; |
271 | ||
50c812b2 | 272 | /* From the get device id response... */ |
3ae0e0f9 | 273 | struct ipmi_device_id device_id; |
1da177e4 | 274 | |
50c812b2 CM |
275 | /* Driver model stuff. */ |
276 | struct device *dev; | |
277 | struct platform_device *pdev; | |
278 | ||
c305e3d3 CM |
279 | /* |
280 | * True if we allocated the device, false if it came from | |
281 | * someplace else (like PCI). | |
282 | */ | |
50c812b2 CM |
283 | int dev_registered; |
284 | ||
1da177e4 LT |
285 | /* Slave address, could be reported from DMI. */ |
286 | unsigned char slave_addr; | |
287 | ||
288 | /* Counters and things for the proc filesystem. */ | |
64959e2d | 289 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 290 | |
c305e3d3 | 291 | struct task_struct *thread; |
b0defcdb CM |
292 | |
293 | struct list_head link; | |
1da177e4 LT |
294 | }; |
295 | ||
64959e2d CM |
296 | #define smi_inc_stat(smi, stat) \ |
297 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
298 | #define smi_get_stat(smi, stat) \ | |
299 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
300 | ||
a51f4a81 CM |
301 | #define SI_MAX_PARMS 4 |
302 | ||
303 | static int force_kipmid[SI_MAX_PARMS]; | |
304 | static int num_force_kipmid; | |
305 | ||
ae74e823 MW |
306 | static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; |
307 | static int num_max_busy_us; | |
308 | ||
b361e27b CM |
309 | static int unload_when_empty = 1; |
310 | ||
2407d77a | 311 | static int add_smi(struct smi_info *smi); |
b0defcdb | 312 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 313 | static void cleanup_one_si(struct smi_info *to_clean); |
b0defcdb | 314 | |
e041c683 | 315 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 316 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 317 | { |
e041c683 | 318 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
319 | } |
320 | ||
1da177e4 LT |
321 | static void deliver_recv_msg(struct smi_info *smi_info, |
322 | struct ipmi_smi_msg *msg) | |
323 | { | |
324 | /* Deliver the message to the upper layer with the lock | |
c305e3d3 | 325 | released. */ |
1da177e4 LT |
326 | spin_unlock(&(smi_info->si_lock)); |
327 | ipmi_smi_msg_received(smi_info->intf, msg); | |
328 | spin_lock(&(smi_info->si_lock)); | |
329 | } | |
330 | ||
4d7cbac7 | 331 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
332 | { |
333 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
334 | ||
4d7cbac7 CM |
335 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
336 | cCode = IPMI_ERR_UNSPECIFIED; | |
337 | /* else use it as is */ | |
338 | ||
1da177e4 LT |
339 | /* Make it a reponse */ |
340 | msg->rsp[0] = msg->data[0] | 4; | |
341 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 342 | msg->rsp[2] = cCode; |
1da177e4 LT |
343 | msg->rsp_size = 3; |
344 | ||
345 | smi_info->curr_msg = NULL; | |
346 | deliver_recv_msg(smi_info, msg); | |
347 | } | |
348 | ||
349 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
350 | { | |
351 | int rv; | |
352 | struct list_head *entry = NULL; | |
353 | #ifdef DEBUG_TIMING | |
354 | struct timeval t; | |
355 | #endif | |
356 | ||
c305e3d3 CM |
357 | /* |
358 | * No need to save flags, we aleady have interrupts off and we | |
359 | * already hold the SMI lock. | |
360 | */ | |
5956dce1 KB |
361 | if (!smi_info->run_to_completion) |
362 | spin_lock(&(smi_info->msg_lock)); | |
1da177e4 LT |
363 | |
364 | /* Pick the high priority queue first. */ | |
b0defcdb | 365 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 366 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 367 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
368 | entry = smi_info->xmit_msgs.next; |
369 | } | |
370 | ||
b0defcdb | 371 | if (!entry) { |
1da177e4 LT |
372 | smi_info->curr_msg = NULL; |
373 | rv = SI_SM_IDLE; | |
374 | } else { | |
375 | int err; | |
376 | ||
377 | list_del(entry); | |
378 | smi_info->curr_msg = list_entry(entry, | |
379 | struct ipmi_smi_msg, | |
380 | link); | |
381 | #ifdef DEBUG_TIMING | |
382 | do_gettimeofday(&t); | |
c305e3d3 | 383 | printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 | 384 | #endif |
e041c683 AS |
385 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
386 | 0, smi_info); | |
ea94027b CM |
387 | if (err & NOTIFY_STOP_MASK) { |
388 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
389 | goto out; | |
390 | } | |
1da177e4 LT |
391 | err = smi_info->handlers->start_transaction( |
392 | smi_info->si_sm, | |
393 | smi_info->curr_msg->data, | |
394 | smi_info->curr_msg->data_size); | |
c305e3d3 | 395 | if (err) |
4d7cbac7 | 396 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
397 | |
398 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
399 | } | |
c305e3d3 | 400 | out: |
5956dce1 KB |
401 | if (!smi_info->run_to_completion) |
402 | spin_unlock(&(smi_info->msg_lock)); | |
1da177e4 LT |
403 | |
404 | return rv; | |
405 | } | |
406 | ||
407 | static void start_enable_irq(struct smi_info *smi_info) | |
408 | { | |
409 | unsigned char msg[2]; | |
410 | ||
c305e3d3 CM |
411 | /* |
412 | * If we are enabling interrupts, we have to tell the | |
413 | * BMC to use them. | |
414 | */ | |
1da177e4 LT |
415 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
416 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
417 | ||
418 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
419 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
420 | } | |
421 | ||
ee6cd5f8 CM |
422 | static void start_disable_irq(struct smi_info *smi_info) |
423 | { | |
424 | unsigned char msg[2]; | |
425 | ||
426 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
427 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
428 | ||
429 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
430 | smi_info->si_state = SI_DISABLE_INTERRUPTS1; | |
431 | } | |
432 | ||
1da177e4 LT |
433 | static void start_clear_flags(struct smi_info *smi_info) |
434 | { | |
435 | unsigned char msg[3]; | |
436 | ||
437 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
438 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
439 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
440 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
441 | ||
442 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
443 | smi_info->si_state = SI_CLEARING_FLAGS; | |
444 | } | |
445 | ||
c305e3d3 CM |
446 | /* |
447 | * When we have a situtaion where we run out of memory and cannot | |
448 | * allocate messages, we just leave them in the BMC and run the system | |
449 | * polled until we can allocate some memory. Once we have some | |
450 | * memory, we will re-enable the interrupt. | |
451 | */ | |
1da177e4 LT |
452 | static inline void disable_si_irq(struct smi_info *smi_info) |
453 | { | |
b0defcdb | 454 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
ee6cd5f8 | 455 | start_disable_irq(smi_info); |
1da177e4 LT |
456 | smi_info->interrupt_disabled = 1; |
457 | } | |
458 | } | |
459 | ||
460 | static inline void enable_si_irq(struct smi_info *smi_info) | |
461 | { | |
462 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
ee6cd5f8 | 463 | start_enable_irq(smi_info); |
1da177e4 LT |
464 | smi_info->interrupt_disabled = 0; |
465 | } | |
466 | } | |
467 | ||
468 | static void handle_flags(struct smi_info *smi_info) | |
469 | { | |
3ae0e0f9 | 470 | retry: |
1da177e4 LT |
471 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
472 | /* Watchdog pre-timeout */ | |
64959e2d | 473 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 LT |
474 | |
475 | start_clear_flags(smi_info); | |
476 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
477 | spin_unlock(&(smi_info->si_lock)); | |
478 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
479 | spin_lock(&(smi_info->si_lock)); | |
480 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { | |
481 | /* Messages available. */ | |
482 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 483 | if (!smi_info->curr_msg) { |
1da177e4 LT |
484 | disable_si_irq(smi_info); |
485 | smi_info->si_state = SI_NORMAL; | |
486 | return; | |
487 | } | |
488 | enable_si_irq(smi_info); | |
489 | ||
490 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
491 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
492 | smi_info->curr_msg->data_size = 2; | |
493 | ||
494 | smi_info->handlers->start_transaction( | |
495 | smi_info->si_sm, | |
496 | smi_info->curr_msg->data, | |
497 | smi_info->curr_msg->data_size); | |
498 | smi_info->si_state = SI_GETTING_MESSAGES; | |
499 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
500 | /* Events available. */ | |
501 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 502 | if (!smi_info->curr_msg) { |
1da177e4 LT |
503 | disable_si_irq(smi_info); |
504 | smi_info->si_state = SI_NORMAL; | |
505 | return; | |
506 | } | |
507 | enable_si_irq(smi_info); | |
508 | ||
509 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
510 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
511 | smi_info->curr_msg->data_size = 2; | |
512 | ||
513 | smi_info->handlers->start_transaction( | |
514 | smi_info->si_sm, | |
515 | smi_info->curr_msg->data, | |
516 | smi_info->curr_msg->data_size); | |
517 | smi_info->si_state = SI_GETTING_EVENTS; | |
4064d5ef | 518 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 519 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
520 | if (smi_info->oem_data_avail_handler(smi_info)) |
521 | goto retry; | |
c305e3d3 | 522 | } else |
1da177e4 | 523 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
524 | } |
525 | ||
526 | static void handle_transaction_done(struct smi_info *smi_info) | |
527 | { | |
528 | struct ipmi_smi_msg *msg; | |
529 | #ifdef DEBUG_TIMING | |
530 | struct timeval t; | |
531 | ||
532 | do_gettimeofday(&t); | |
c305e3d3 | 533 | printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
534 | #endif |
535 | switch (smi_info->si_state) { | |
536 | case SI_NORMAL: | |
b0defcdb | 537 | if (!smi_info->curr_msg) |
1da177e4 LT |
538 | break; |
539 | ||
540 | smi_info->curr_msg->rsp_size | |
541 | = smi_info->handlers->get_result( | |
542 | smi_info->si_sm, | |
543 | smi_info->curr_msg->rsp, | |
544 | IPMI_MAX_MSG_LENGTH); | |
545 | ||
c305e3d3 CM |
546 | /* |
547 | * Do this here becase deliver_recv_msg() releases the | |
548 | * lock, and a new message can be put in during the | |
549 | * time the lock is released. | |
550 | */ | |
1da177e4 LT |
551 | msg = smi_info->curr_msg; |
552 | smi_info->curr_msg = NULL; | |
553 | deliver_recv_msg(smi_info, msg); | |
554 | break; | |
555 | ||
556 | case SI_GETTING_FLAGS: | |
557 | { | |
558 | unsigned char msg[4]; | |
559 | unsigned int len; | |
560 | ||
561 | /* We got the flags from the SMI, now handle them. */ | |
562 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
563 | if (msg[2] != 0) { | |
c305e3d3 | 564 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
565 | smi_info->si_state = SI_NORMAL; |
566 | } else if (len < 4) { | |
c305e3d3 CM |
567 | /* |
568 | * Hmm, no flags. That's technically illegal, but | |
569 | * don't use uninitialized data. | |
570 | */ | |
1da177e4 LT |
571 | smi_info->si_state = SI_NORMAL; |
572 | } else { | |
573 | smi_info->msg_flags = msg[3]; | |
574 | handle_flags(smi_info); | |
575 | } | |
576 | break; | |
577 | } | |
578 | ||
579 | case SI_CLEARING_FLAGS: | |
580 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
581 | { | |
582 | unsigned char msg[3]; | |
583 | ||
584 | /* We cleared the flags. */ | |
585 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
586 | if (msg[2] != 0) { | |
587 | /* Error clearing flags */ | |
588 | printk(KERN_WARNING | |
589 | "ipmi_si: Error clearing flags: %2.2x\n", | |
590 | msg[2]); | |
591 | } | |
592 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
593 | start_enable_irq(smi_info); | |
594 | else | |
595 | smi_info->si_state = SI_NORMAL; | |
596 | break; | |
597 | } | |
598 | ||
599 | case SI_GETTING_EVENTS: | |
600 | { | |
601 | smi_info->curr_msg->rsp_size | |
602 | = smi_info->handlers->get_result( | |
603 | smi_info->si_sm, | |
604 | smi_info->curr_msg->rsp, | |
605 | IPMI_MAX_MSG_LENGTH); | |
606 | ||
c305e3d3 CM |
607 | /* |
608 | * Do this here becase deliver_recv_msg() releases the | |
609 | * lock, and a new message can be put in during the | |
610 | * time the lock is released. | |
611 | */ | |
1da177e4 LT |
612 | msg = smi_info->curr_msg; |
613 | smi_info->curr_msg = NULL; | |
614 | if (msg->rsp[2] != 0) { | |
615 | /* Error getting event, probably done. */ | |
616 | msg->done(msg); | |
617 | ||
618 | /* Take off the event flag. */ | |
619 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
620 | handle_flags(smi_info); | |
621 | } else { | |
64959e2d | 622 | smi_inc_stat(smi_info, events); |
1da177e4 | 623 | |
c305e3d3 CM |
624 | /* |
625 | * Do this before we deliver the message | |
626 | * because delivering the message releases the | |
627 | * lock and something else can mess with the | |
628 | * state. | |
629 | */ | |
1da177e4 LT |
630 | handle_flags(smi_info); |
631 | ||
632 | deliver_recv_msg(smi_info, msg); | |
633 | } | |
634 | break; | |
635 | } | |
636 | ||
637 | case SI_GETTING_MESSAGES: | |
638 | { | |
639 | smi_info->curr_msg->rsp_size | |
640 | = smi_info->handlers->get_result( | |
641 | smi_info->si_sm, | |
642 | smi_info->curr_msg->rsp, | |
643 | IPMI_MAX_MSG_LENGTH); | |
644 | ||
c305e3d3 CM |
645 | /* |
646 | * Do this here becase deliver_recv_msg() releases the | |
647 | * lock, and a new message can be put in during the | |
648 | * time the lock is released. | |
649 | */ | |
1da177e4 LT |
650 | msg = smi_info->curr_msg; |
651 | smi_info->curr_msg = NULL; | |
652 | if (msg->rsp[2] != 0) { | |
653 | /* Error getting event, probably done. */ | |
654 | msg->done(msg); | |
655 | ||
656 | /* Take off the msg flag. */ | |
657 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
658 | handle_flags(smi_info); | |
659 | } else { | |
64959e2d | 660 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 661 | |
c305e3d3 CM |
662 | /* |
663 | * Do this before we deliver the message | |
664 | * because delivering the message releases the | |
665 | * lock and something else can mess with the | |
666 | * state. | |
667 | */ | |
1da177e4 LT |
668 | handle_flags(smi_info); |
669 | ||
670 | deliver_recv_msg(smi_info, msg); | |
671 | } | |
672 | break; | |
673 | } | |
674 | ||
675 | case SI_ENABLE_INTERRUPTS1: | |
676 | { | |
677 | unsigned char msg[4]; | |
678 | ||
679 | /* We got the flags from the SMI, now handle them. */ | |
680 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
681 | if (msg[2] != 0) { | |
682 | printk(KERN_WARNING | |
683 | "ipmi_si: Could not enable interrupts" | |
684 | ", failed get, using polled mode.\n"); | |
685 | smi_info->si_state = SI_NORMAL; | |
686 | } else { | |
687 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
688 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
ee6cd5f8 CM |
689 | msg[2] = (msg[3] | |
690 | IPMI_BMC_RCV_MSG_INTR | | |
691 | IPMI_BMC_EVT_MSG_INTR); | |
1da177e4 LT |
692 | smi_info->handlers->start_transaction( |
693 | smi_info->si_sm, msg, 3); | |
694 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
695 | } | |
696 | break; | |
697 | } | |
698 | ||
699 | case SI_ENABLE_INTERRUPTS2: | |
700 | { | |
701 | unsigned char msg[4]; | |
702 | ||
703 | /* We got the flags from the SMI, now handle them. */ | |
704 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
705 | if (msg[2] != 0) { | |
706 | printk(KERN_WARNING | |
707 | "ipmi_si: Could not enable interrupts" | |
708 | ", failed set, using polled mode.\n"); | |
709 | } | |
710 | smi_info->si_state = SI_NORMAL; | |
711 | break; | |
712 | } | |
ee6cd5f8 CM |
713 | |
714 | case SI_DISABLE_INTERRUPTS1: | |
715 | { | |
716 | unsigned char msg[4]; | |
717 | ||
718 | /* We got the flags from the SMI, now handle them. */ | |
719 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
720 | if (msg[2] != 0) { | |
721 | printk(KERN_WARNING | |
722 | "ipmi_si: Could not disable interrupts" | |
723 | ", failed get.\n"); | |
724 | smi_info->si_state = SI_NORMAL; | |
725 | } else { | |
726 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
727 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
728 | msg[2] = (msg[3] & | |
729 | ~(IPMI_BMC_RCV_MSG_INTR | | |
730 | IPMI_BMC_EVT_MSG_INTR)); | |
731 | smi_info->handlers->start_transaction( | |
732 | smi_info->si_sm, msg, 3); | |
733 | smi_info->si_state = SI_DISABLE_INTERRUPTS2; | |
734 | } | |
735 | break; | |
736 | } | |
737 | ||
738 | case SI_DISABLE_INTERRUPTS2: | |
739 | { | |
740 | unsigned char msg[4]; | |
741 | ||
742 | /* We got the flags from the SMI, now handle them. */ | |
743 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
744 | if (msg[2] != 0) { | |
745 | printk(KERN_WARNING | |
746 | "ipmi_si: Could not disable interrupts" | |
747 | ", failed set.\n"); | |
748 | } | |
749 | smi_info->si_state = SI_NORMAL; | |
750 | break; | |
751 | } | |
1da177e4 LT |
752 | } |
753 | } | |
754 | ||
c305e3d3 CM |
755 | /* |
756 | * Called on timeouts and events. Timeouts should pass the elapsed | |
757 | * time, interrupts should pass in zero. Must be called with | |
758 | * si_lock held and interrupts disabled. | |
759 | */ | |
1da177e4 LT |
760 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
761 | int time) | |
762 | { | |
763 | enum si_sm_result si_sm_result; | |
764 | ||
765 | restart: | |
c305e3d3 CM |
766 | /* |
767 | * There used to be a loop here that waited a little while | |
768 | * (around 25us) before giving up. That turned out to be | |
769 | * pointless, the minimum delays I was seeing were in the 300us | |
770 | * range, which is far too long to wait in an interrupt. So | |
771 | * we just run until the state machine tells us something | |
772 | * happened or it needs a delay. | |
773 | */ | |
1da177e4 LT |
774 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
775 | time = 0; | |
776 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 777 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 778 | |
c305e3d3 | 779 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 780 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
781 | |
782 | handle_transaction_done(smi_info); | |
783 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 784 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 785 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 786 | |
c305e3d3 CM |
787 | /* |
788 | * Do the before return_hosed_msg, because that | |
789 | * releases the lock. | |
790 | */ | |
1da177e4 LT |
791 | smi_info->si_state = SI_NORMAL; |
792 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
793 | /* |
794 | * If we were handling a user message, format | |
795 | * a response to send to the upper layer to | |
796 | * tell it about the error. | |
797 | */ | |
4d7cbac7 | 798 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
799 | } |
800 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
801 | } | |
802 | ||
4ea18425 CM |
803 | /* |
804 | * We prefer handling attn over new messages. But don't do | |
805 | * this if there is not yet an upper layer to handle anything. | |
806 | */ | |
c305e3d3 | 807 | if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) { |
1da177e4 LT |
808 | unsigned char msg[2]; |
809 | ||
64959e2d | 810 | smi_inc_stat(smi_info, attentions); |
1da177e4 | 811 | |
c305e3d3 CM |
812 | /* |
813 | * Got a attn, send down a get message flags to see | |
814 | * what's causing it. It would be better to handle | |
815 | * this in the upper layer, but due to the way | |
816 | * interrupts work with the SMI, that's not really | |
817 | * possible. | |
818 | */ | |
1da177e4 LT |
819 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
820 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
821 | ||
822 | smi_info->handlers->start_transaction( | |
823 | smi_info->si_sm, msg, 2); | |
824 | smi_info->si_state = SI_GETTING_FLAGS; | |
825 | goto restart; | |
826 | } | |
827 | ||
828 | /* If we are currently idle, try to start the next message. */ | |
829 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 830 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
831 | |
832 | si_sm_result = start_next_msg(smi_info); | |
833 | if (si_sm_result != SI_SM_IDLE) | |
834 | goto restart; | |
c305e3d3 | 835 | } |
1da177e4 LT |
836 | |
837 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
838 | && (atomic_read(&smi_info->req_events))) { |
839 | /* | |
840 | * We are idle and the upper layer requested that I fetch | |
841 | * events, so do so. | |
842 | */ | |
55162fb1 | 843 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 844 | |
55162fb1 CM |
845 | smi_info->curr_msg = ipmi_alloc_smi_msg(); |
846 | if (!smi_info->curr_msg) | |
847 | goto out; | |
1da177e4 | 848 | |
55162fb1 CM |
849 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
850 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
851 | smi_info->curr_msg->data_size = 2; | |
1da177e4 LT |
852 | |
853 | smi_info->handlers->start_transaction( | |
55162fb1 CM |
854 | smi_info->si_sm, |
855 | smi_info->curr_msg->data, | |
856 | smi_info->curr_msg->data_size); | |
857 | smi_info->si_state = SI_GETTING_EVENTS; | |
1da177e4 LT |
858 | goto restart; |
859 | } | |
55162fb1 | 860 | out: |
1da177e4 LT |
861 | return si_sm_result; |
862 | } | |
863 | ||
864 | static void sender(void *send_info, | |
865 | struct ipmi_smi_msg *msg, | |
866 | int priority) | |
867 | { | |
868 | struct smi_info *smi_info = send_info; | |
869 | enum si_sm_result result; | |
870 | unsigned long flags; | |
871 | #ifdef DEBUG_TIMING | |
872 | struct timeval t; | |
873 | #endif | |
874 | ||
b361e27b CM |
875 | if (atomic_read(&smi_info->stop_operation)) { |
876 | msg->rsp[0] = msg->data[0] | 4; | |
877 | msg->rsp[1] = msg->data[1]; | |
878 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
879 | msg->rsp_size = 3; | |
880 | deliver_recv_msg(smi_info, msg); | |
881 | return; | |
882 | } | |
883 | ||
1da177e4 LT |
884 | #ifdef DEBUG_TIMING |
885 | do_gettimeofday(&t); | |
886 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
887 | #endif | |
888 | ||
889 | if (smi_info->run_to_completion) { | |
bda4c30a CM |
890 | /* |
891 | * If we are running to completion, then throw it in | |
892 | * the list and run transactions until everything is | |
893 | * clear. Priority doesn't matter here. | |
894 | */ | |
895 | ||
896 | /* | |
897 | * Run to completion means we are single-threaded, no | |
898 | * need for locks. | |
899 | */ | |
1da177e4 LT |
900 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); |
901 | ||
1da177e4 LT |
902 | result = smi_event_handler(smi_info, 0); |
903 | while (result != SI_SM_IDLE) { | |
904 | udelay(SI_SHORT_TIMEOUT_USEC); | |
905 | result = smi_event_handler(smi_info, | |
906 | SI_SHORT_TIMEOUT_USEC); | |
907 | } | |
1da177e4 | 908 | return; |
1da177e4 | 909 | } |
1da177e4 | 910 | |
bda4c30a CM |
911 | spin_lock_irqsave(&smi_info->msg_lock, flags); |
912 | if (priority > 0) | |
913 | list_add_tail(&msg->link, &smi_info->hp_xmit_msgs); | |
914 | else | |
915 | list_add_tail(&msg->link, &smi_info->xmit_msgs); | |
916 | spin_unlock_irqrestore(&smi_info->msg_lock, flags); | |
917 | ||
918 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
c305e3d3 | 919 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) |
1da177e4 | 920 | start_next_msg(smi_info); |
bda4c30a | 921 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
922 | } |
923 | ||
924 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
925 | { | |
926 | struct smi_info *smi_info = send_info; | |
927 | enum si_sm_result result; | |
1da177e4 LT |
928 | |
929 | smi_info->run_to_completion = i_run_to_completion; | |
930 | if (i_run_to_completion) { | |
931 | result = smi_event_handler(smi_info, 0); | |
932 | while (result != SI_SM_IDLE) { | |
933 | udelay(SI_SHORT_TIMEOUT_USEC); | |
934 | result = smi_event_handler(smi_info, | |
935 | SI_SHORT_TIMEOUT_USEC); | |
936 | } | |
937 | } | |
1da177e4 LT |
938 | } |
939 | ||
ae74e823 MW |
940 | /* |
941 | * Use -1 in the nsec value of the busy waiting timespec to tell that | |
942 | * we are spinning in kipmid looking for something and not delaying | |
943 | * between checks | |
944 | */ | |
945 | static inline void ipmi_si_set_not_busy(struct timespec *ts) | |
946 | { | |
947 | ts->tv_nsec = -1; | |
948 | } | |
949 | static inline int ipmi_si_is_busy(struct timespec *ts) | |
950 | { | |
951 | return ts->tv_nsec != -1; | |
952 | } | |
953 | ||
954 | static int ipmi_thread_busy_wait(enum si_sm_result smi_result, | |
955 | const struct smi_info *smi_info, | |
956 | struct timespec *busy_until) | |
957 | { | |
958 | unsigned int max_busy_us = 0; | |
959 | ||
960 | if (smi_info->intf_num < num_max_busy_us) | |
961 | max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; | |
962 | if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) | |
963 | ipmi_si_set_not_busy(busy_until); | |
964 | else if (!ipmi_si_is_busy(busy_until)) { | |
965 | getnstimeofday(busy_until); | |
966 | timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); | |
967 | } else { | |
968 | struct timespec now; | |
969 | getnstimeofday(&now); | |
970 | if (unlikely(timespec_compare(&now, busy_until) > 0)) { | |
971 | ipmi_si_set_not_busy(busy_until); | |
972 | return 0; | |
973 | } | |
974 | } | |
975 | return 1; | |
976 | } | |
977 | ||
978 | ||
979 | /* | |
980 | * A busy-waiting loop for speeding up IPMI operation. | |
981 | * | |
982 | * Lousy hardware makes this hard. This is only enabled for systems | |
983 | * that are not BT and do not have interrupts. It starts spinning | |
984 | * when an operation is complete or until max_busy tells it to stop | |
985 | * (if that is enabled). See the paragraph on kimid_max_busy_us in | |
986 | * Documentation/IPMI.txt for details. | |
987 | */ | |
a9a2c44f CM |
988 | static int ipmi_thread(void *data) |
989 | { | |
990 | struct smi_info *smi_info = data; | |
e9a705a0 | 991 | unsigned long flags; |
a9a2c44f | 992 | enum si_sm_result smi_result; |
ae74e823 | 993 | struct timespec busy_until; |
a9a2c44f | 994 | |
ae74e823 | 995 | ipmi_si_set_not_busy(&busy_until); |
a9a2c44f | 996 | set_user_nice(current, 19); |
e9a705a0 | 997 | while (!kthread_should_stop()) { |
ae74e823 MW |
998 | int busy_wait; |
999 | ||
a9a2c44f | 1000 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 1001 | smi_result = smi_event_handler(smi_info, 0); |
a9a2c44f | 1002 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
ae74e823 MW |
1003 | busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, |
1004 | &busy_until); | |
c305e3d3 CM |
1005 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
1006 | ; /* do nothing */ | |
ae74e823 | 1007 | else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) |
33979734 | 1008 | schedule(); |
e9a705a0 | 1009 | else |
ae74e823 | 1010 | schedule_timeout_interruptible(0); |
a9a2c44f | 1011 | } |
a9a2c44f CM |
1012 | return 0; |
1013 | } | |
1014 | ||
1015 | ||
1da177e4 LT |
1016 | static void poll(void *send_info) |
1017 | { | |
1018 | struct smi_info *smi_info = send_info; | |
fcfa4724 | 1019 | unsigned long flags; |
1da177e4 | 1020 | |
15c62e10 CM |
1021 | /* |
1022 | * Make sure there is some delay in the poll loop so we can | |
1023 | * drive time forward and timeout things. | |
1024 | */ | |
1025 | udelay(10); | |
fcfa4724 | 1026 | spin_lock_irqsave(&smi_info->si_lock, flags); |
15c62e10 | 1027 | smi_event_handler(smi_info, 10); |
fcfa4724 | 1028 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | static void request_events(void *send_info) | |
1032 | { | |
1033 | struct smi_info *smi_info = send_info; | |
1034 | ||
40112ae7 CM |
1035 | if (atomic_read(&smi_info->stop_operation) || |
1036 | !smi_info->has_event_buffer) | |
b361e27b CM |
1037 | return; |
1038 | ||
1da177e4 LT |
1039 | atomic_set(&smi_info->req_events, 1); |
1040 | } | |
1041 | ||
0c8204b3 | 1042 | static int initialized; |
1da177e4 | 1043 | |
1da177e4 LT |
1044 | static void smi_timeout(unsigned long data) |
1045 | { | |
1046 | struct smi_info *smi_info = (struct smi_info *) data; | |
1047 | enum si_sm_result smi_result; | |
1048 | unsigned long flags; | |
1049 | unsigned long jiffies_now; | |
c4edff1c | 1050 | long time_diff; |
1da177e4 LT |
1051 | #ifdef DEBUG_TIMING |
1052 | struct timeval t; | |
1053 | #endif | |
1054 | ||
1da177e4 LT |
1055 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
1056 | #ifdef DEBUG_TIMING | |
1057 | do_gettimeofday(&t); | |
c305e3d3 | 1058 | printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1059 | #endif |
1060 | jiffies_now = jiffies; | |
c4edff1c | 1061 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
1062 | * SI_USEC_PER_JIFFY); |
1063 | smi_result = smi_event_handler(smi_info, time_diff); | |
1064 | ||
1065 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1066 | ||
1067 | smi_info->last_timeout_jiffies = jiffies_now; | |
1068 | ||
b0defcdb | 1069 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 LT |
1070 | /* Running with interrupts, only do long timeouts. */ |
1071 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; | |
64959e2d | 1072 | smi_inc_stat(smi_info, long_timeouts); |
1da177e4 LT |
1073 | goto do_add_timer; |
1074 | } | |
1075 | ||
c305e3d3 CM |
1076 | /* |
1077 | * If the state machine asks for a short delay, then shorten | |
1078 | * the timer timeout. | |
1079 | */ | |
1da177e4 | 1080 | if (smi_result == SI_SM_CALL_WITH_DELAY) { |
64959e2d | 1081 | smi_inc_stat(smi_info, short_timeouts); |
1da177e4 | 1082 | smi_info->si_timer.expires = jiffies + 1; |
1da177e4 | 1083 | } else { |
64959e2d | 1084 | smi_inc_stat(smi_info, long_timeouts); |
1da177e4 | 1085 | smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1086 | } |
1087 | ||
1088 | do_add_timer: | |
1089 | add_timer(&(smi_info->si_timer)); | |
1090 | } | |
1091 | ||
7d12e780 | 1092 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
1093 | { |
1094 | struct smi_info *smi_info = data; | |
1095 | unsigned long flags; | |
1096 | #ifdef DEBUG_TIMING | |
1097 | struct timeval t; | |
1098 | #endif | |
1099 | ||
1100 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1101 | ||
64959e2d | 1102 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1103 | |
1da177e4 LT |
1104 | #ifdef DEBUG_TIMING |
1105 | do_gettimeofday(&t); | |
c305e3d3 | 1106 | printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1107 | #endif |
1108 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1109 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1110 | return IRQ_HANDLED; | |
1111 | } | |
1112 | ||
7d12e780 | 1113 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
1114 | { |
1115 | struct smi_info *smi_info = data; | |
1116 | /* We need to clear the IRQ flag for the BT interface. */ | |
1117 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1118 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1119 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 1120 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
1121 | } |
1122 | ||
453823ba CM |
1123 | static int smi_start_processing(void *send_info, |
1124 | ipmi_smi_t intf) | |
1125 | { | |
1126 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1127 | int enable = 0; |
453823ba CM |
1128 | |
1129 | new_smi->intf = intf; | |
1130 | ||
c45adc39 CM |
1131 | /* Try to claim any interrupts. */ |
1132 | if (new_smi->irq_setup) | |
1133 | new_smi->irq_setup(new_smi); | |
1134 | ||
453823ba CM |
1135 | /* Set up the timer that drives the interface. */ |
1136 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
1137 | new_smi->last_timeout_jiffies = jiffies; | |
1138 | mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
1139 | ||
a51f4a81 CM |
1140 | /* |
1141 | * Check if the user forcefully enabled the daemon. | |
1142 | */ | |
1143 | if (new_smi->intf_num < num_force_kipmid) | |
1144 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1145 | /* |
1146 | * The BT interface is efficient enough to not need a thread, | |
1147 | * and there is no need for a thread if we have interrupts. | |
1148 | */ | |
c305e3d3 | 1149 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
a51f4a81 CM |
1150 | enable = 1; |
1151 | ||
1152 | if (enable) { | |
453823ba CM |
1153 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1154 | "kipmi%d", new_smi->intf_num); | |
1155 | if (IS_ERR(new_smi->thread)) { | |
1156 | printk(KERN_NOTICE "ipmi_si_intf: Could not start" | |
1157 | " kernel thread due to error %ld, only using" | |
1158 | " timers to drive the interface\n", | |
1159 | PTR_ERR(new_smi->thread)); | |
1160 | new_smi->thread = NULL; | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | return 0; | |
1165 | } | |
9dbf68f9 | 1166 | |
b9675136 CM |
1167 | static void set_maintenance_mode(void *send_info, int enable) |
1168 | { | |
1169 | struct smi_info *smi_info = send_info; | |
1170 | ||
1171 | if (!enable) | |
1172 | atomic_set(&smi_info->req_events, 0); | |
1173 | } | |
1174 | ||
c305e3d3 | 1175 | static struct ipmi_smi_handlers handlers = { |
1da177e4 | 1176 | .owner = THIS_MODULE, |
453823ba | 1177 | .start_processing = smi_start_processing, |
1da177e4 LT |
1178 | .sender = sender, |
1179 | .request_events = request_events, | |
b9675136 | 1180 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
1181 | .set_run_to_completion = set_run_to_completion, |
1182 | .poll = poll, | |
1183 | }; | |
1184 | ||
c305e3d3 CM |
1185 | /* |
1186 | * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1187 | * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. | |
1188 | */ | |
1da177e4 | 1189 | |
b0defcdb | 1190 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1191 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1192 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1193 | |
1da177e4 | 1194 | #define DEFAULT_REGSPACING 1 |
dba9b4f6 | 1195 | #define DEFAULT_REGSIZE 1 |
1da177e4 LT |
1196 | |
1197 | static int si_trydefaults = 1; | |
1198 | static char *si_type[SI_MAX_PARMS]; | |
1199 | #define MAX_SI_TYPE_STR 30 | |
1200 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1201 | static unsigned long addrs[SI_MAX_PARMS]; | |
64a6f950 | 1202 | static unsigned int num_addrs; |
1da177e4 | 1203 | static unsigned int ports[SI_MAX_PARMS]; |
64a6f950 | 1204 | static unsigned int num_ports; |
1da177e4 | 1205 | static int irqs[SI_MAX_PARMS]; |
64a6f950 | 1206 | static unsigned int num_irqs; |
1da177e4 | 1207 | static int regspacings[SI_MAX_PARMS]; |
64a6f950 | 1208 | static unsigned int num_regspacings; |
1da177e4 | 1209 | static int regsizes[SI_MAX_PARMS]; |
64a6f950 | 1210 | static unsigned int num_regsizes; |
1da177e4 | 1211 | static int regshifts[SI_MAX_PARMS]; |
64a6f950 | 1212 | static unsigned int num_regshifts; |
2f95d513 | 1213 | static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ |
64a6f950 | 1214 | static unsigned int num_slave_addrs; |
1da177e4 | 1215 | |
b361e27b CM |
1216 | #define IPMI_IO_ADDR_SPACE 0 |
1217 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1218 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1219 | |
1220 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1221 | ||
1222 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1223 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1224 | " Documentation/IPMI.txt in the kernel sources for the" | |
1225 | " gory details."); | |
1da177e4 LT |
1226 | |
1227 | module_param_named(trydefaults, si_trydefaults, bool, 0); | |
1228 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1229 | " default scan of the KCS and SMIC interface at the standard" | |
1230 | " address"); | |
1231 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1232 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1233 | " interface separated by commas. The types are 'kcs'," | |
1234 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1235 | " the first interface to kcs and the second to bt"); | |
64a6f950 | 1236 | module_param_array(addrs, ulong, &num_addrs, 0); |
1da177e4 LT |
1237 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" |
1238 | " addresses separated by commas. Only use if an interface" | |
1239 | " is in memory. Otherwise, set it to zero or leave" | |
1240 | " it blank."); | |
64a6f950 | 1241 | module_param_array(ports, uint, &num_ports, 0); |
1da177e4 LT |
1242 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" |
1243 | " addresses separated by commas. Only use if an interface" | |
1244 | " is a port. Otherwise, set it to zero or leave" | |
1245 | " it blank."); | |
1246 | module_param_array(irqs, int, &num_irqs, 0); | |
1247 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1248 | " addresses separated by commas. Only use if an interface" | |
1249 | " has an interrupt. Otherwise, set it to zero or leave" | |
1250 | " it blank."); | |
1251 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1252 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1253 | " and each successive register used by the interface. For" | |
1254 | " instance, if the start address is 0xca2 and the spacing" | |
1255 | " is 2, then the second address is at 0xca4. Defaults" | |
1256 | " to 1."); | |
1257 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1258 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1259 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1260 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1261 | " the 8-bit IPMI register has to be read from a larger" | |
1262 | " register."); | |
1263 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1264 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1265 | " IPMI register, in bits. For instance, if the data" | |
1266 | " is read from a 32-bit word and the IPMI data is in" | |
1267 | " bit 8-15, then the shift would be 8"); | |
1268 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1269 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1270 | " the controller. Normally this is 0x20, but can be" | |
1271 | " overridden by this parm. This is an array indexed" | |
1272 | " by interface number."); | |
a51f4a81 CM |
1273 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1274 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1275 | " disabled(0). Normally the IPMI driver auto-detects" | |
1276 | " this, but the value may be overridden by this parm."); | |
b361e27b CM |
1277 | module_param(unload_when_empty, int, 0); |
1278 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" | |
1279 | " specified or found, default is 1. Setting to 0" | |
1280 | " is useful for hot add of devices using hotmod."); | |
ae74e823 MW |
1281 | module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); |
1282 | MODULE_PARM_DESC(kipmid_max_busy_us, | |
1283 | "Max time (in microseconds) to busy-wait for IPMI data before" | |
1284 | " sleeping. 0 (default) means to wait forever. Set to 100-500" | |
1285 | " if kipmid is using up a lot of CPU time."); | |
1da177e4 LT |
1286 | |
1287 | ||
b0defcdb | 1288 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1289 | { |
b0defcdb CM |
1290 | if (info->si_type == SI_BT) |
1291 | /* Disable the interrupt in the BT interface. */ | |
1292 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1293 | free_irq(info->irq, info); | |
1da177e4 | 1294 | } |
1da177e4 LT |
1295 | |
1296 | static int std_irq_setup(struct smi_info *info) | |
1297 | { | |
1298 | int rv; | |
1299 | ||
b0defcdb | 1300 | if (!info->irq) |
1da177e4 LT |
1301 | return 0; |
1302 | ||
9dbf68f9 CM |
1303 | if (info->si_type == SI_BT) { |
1304 | rv = request_irq(info->irq, | |
1305 | si_bt_irq_handler, | |
ee6cd5f8 | 1306 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1307 | DEVICE_NAME, |
1308 | info); | |
b0defcdb | 1309 | if (!rv) |
9dbf68f9 CM |
1310 | /* Enable the interrupt in the BT interface. */ |
1311 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1312 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1313 | } else | |
1314 | rv = request_irq(info->irq, | |
1315 | si_irq_handler, | |
ee6cd5f8 | 1316 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1317 | DEVICE_NAME, |
1318 | info); | |
1da177e4 LT |
1319 | if (rv) { |
1320 | printk(KERN_WARNING | |
1321 | "ipmi_si: %s unable to claim interrupt %d," | |
1322 | " running polled\n", | |
1323 | DEVICE_NAME, info->irq); | |
1324 | info->irq = 0; | |
1325 | } else { | |
b0defcdb | 1326 | info->irq_cleanup = std_irq_cleanup; |
1da177e4 LT |
1327 | printk(" Using irq %d\n", info->irq); |
1328 | } | |
1329 | ||
1330 | return rv; | |
1331 | } | |
1332 | ||
1da177e4 LT |
1333 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1334 | { | |
b0defcdb | 1335 | unsigned int addr = io->addr_data; |
1da177e4 | 1336 | |
b0defcdb | 1337 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1338 | } |
1339 | ||
1340 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1341 | unsigned char b) | |
1342 | { | |
b0defcdb | 1343 | unsigned int addr = io->addr_data; |
1da177e4 | 1344 | |
b0defcdb | 1345 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1346 | } |
1347 | ||
1348 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1349 | { | |
b0defcdb | 1350 | unsigned int addr = io->addr_data; |
1da177e4 | 1351 | |
b0defcdb | 1352 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1353 | } |
1354 | ||
1355 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1356 | unsigned char b) | |
1357 | { | |
b0defcdb | 1358 | unsigned int addr = io->addr_data; |
1da177e4 | 1359 | |
b0defcdb | 1360 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1361 | } |
1362 | ||
1363 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1364 | { | |
b0defcdb | 1365 | unsigned int addr = io->addr_data; |
1da177e4 | 1366 | |
b0defcdb | 1367 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1368 | } |
1369 | ||
1370 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1371 | unsigned char b) | |
1372 | { | |
b0defcdb | 1373 | unsigned int addr = io->addr_data; |
1da177e4 | 1374 | |
b0defcdb | 1375 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1376 | } |
1377 | ||
1378 | static void port_cleanup(struct smi_info *info) | |
1379 | { | |
b0defcdb | 1380 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1381 | int idx; |
1da177e4 | 1382 | |
b0defcdb | 1383 | if (addr) { |
c305e3d3 | 1384 | for (idx = 0; idx < info->io_size; idx++) |
d61a3ead CM |
1385 | release_region(addr + idx * info->io.regspacing, |
1386 | info->io.regsize); | |
1da177e4 | 1387 | } |
1da177e4 LT |
1388 | } |
1389 | ||
1390 | static int port_setup(struct smi_info *info) | |
1391 | { | |
b0defcdb | 1392 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1393 | int idx; |
1da177e4 | 1394 | |
b0defcdb | 1395 | if (!addr) |
1da177e4 LT |
1396 | return -ENODEV; |
1397 | ||
1398 | info->io_cleanup = port_cleanup; | |
1399 | ||
c305e3d3 CM |
1400 | /* |
1401 | * Figure out the actual inb/inw/inl/etc routine to use based | |
1402 | * upon the register size. | |
1403 | */ | |
1da177e4 LT |
1404 | switch (info->io.regsize) { |
1405 | case 1: | |
1406 | info->io.inputb = port_inb; | |
1407 | info->io.outputb = port_outb; | |
1408 | break; | |
1409 | case 2: | |
1410 | info->io.inputb = port_inw; | |
1411 | info->io.outputb = port_outw; | |
1412 | break; | |
1413 | case 4: | |
1414 | info->io.inputb = port_inl; | |
1415 | info->io.outputb = port_outl; | |
1416 | break; | |
1417 | default: | |
c305e3d3 | 1418 | printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n", |
1da177e4 LT |
1419 | info->io.regsize); |
1420 | return -EINVAL; | |
1421 | } | |
1422 | ||
c305e3d3 CM |
1423 | /* |
1424 | * Some BIOSes reserve disjoint I/O regions in their ACPI | |
d61a3ead CM |
1425 | * tables. This causes problems when trying to register the |
1426 | * entire I/O region. Therefore we must register each I/O | |
1427 | * port separately. | |
1428 | */ | |
c305e3d3 | 1429 | for (idx = 0; idx < info->io_size; idx++) { |
d61a3ead CM |
1430 | if (request_region(addr + idx * info->io.regspacing, |
1431 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1432 | /* Undo allocations */ | |
1433 | while (idx--) { | |
1434 | release_region(addr + idx * info->io.regspacing, | |
1435 | info->io.regsize); | |
1436 | } | |
1437 | return -EIO; | |
1438 | } | |
1439 | } | |
1da177e4 LT |
1440 | return 0; |
1441 | } | |
1442 | ||
546cfdf4 | 1443 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1444 | { |
1445 | return readb((io->addr)+(offset * io->regspacing)); | |
1446 | } | |
1447 | ||
546cfdf4 | 1448 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1449 | unsigned char b) |
1450 | { | |
1451 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1452 | } | |
1453 | ||
546cfdf4 | 1454 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1455 | { |
1456 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1457 | & 0xff; |
1da177e4 LT |
1458 | } |
1459 | ||
546cfdf4 | 1460 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1461 | unsigned char b) |
1462 | { | |
1463 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1464 | } | |
1465 | ||
546cfdf4 | 1466 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1467 | { |
1468 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1469 | & 0xff; |
1da177e4 LT |
1470 | } |
1471 | ||
546cfdf4 | 1472 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1473 | unsigned char b) |
1474 | { | |
1475 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1476 | } | |
1477 | ||
1478 | #ifdef readq | |
1479 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1480 | { | |
1481 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1482 | & 0xff; |
1da177e4 LT |
1483 | } |
1484 | ||
1485 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1486 | unsigned char b) | |
1487 | { | |
1488 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1489 | } | |
1490 | #endif | |
1491 | ||
1492 | static void mem_cleanup(struct smi_info *info) | |
1493 | { | |
b0defcdb | 1494 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1495 | int mapsize; |
1496 | ||
1497 | if (info->io.addr) { | |
1498 | iounmap(info->io.addr); | |
1499 | ||
1500 | mapsize = ((info->io_size * info->io.regspacing) | |
1501 | - (info->io.regspacing - info->io.regsize)); | |
1502 | ||
b0defcdb | 1503 | release_mem_region(addr, mapsize); |
1da177e4 | 1504 | } |
1da177e4 LT |
1505 | } |
1506 | ||
1507 | static int mem_setup(struct smi_info *info) | |
1508 | { | |
b0defcdb | 1509 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1510 | int mapsize; |
1511 | ||
b0defcdb | 1512 | if (!addr) |
1da177e4 LT |
1513 | return -ENODEV; |
1514 | ||
1515 | info->io_cleanup = mem_cleanup; | |
1516 | ||
c305e3d3 CM |
1517 | /* |
1518 | * Figure out the actual readb/readw/readl/etc routine to use based | |
1519 | * upon the register size. | |
1520 | */ | |
1da177e4 LT |
1521 | switch (info->io.regsize) { |
1522 | case 1: | |
546cfdf4 AD |
1523 | info->io.inputb = intf_mem_inb; |
1524 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1525 | break; |
1526 | case 2: | |
546cfdf4 AD |
1527 | info->io.inputb = intf_mem_inw; |
1528 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1529 | break; |
1530 | case 4: | |
546cfdf4 AD |
1531 | info->io.inputb = intf_mem_inl; |
1532 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1533 | break; |
1534 | #ifdef readq | |
1535 | case 8: | |
1536 | info->io.inputb = mem_inq; | |
1537 | info->io.outputb = mem_outq; | |
1538 | break; | |
1539 | #endif | |
1540 | default: | |
c305e3d3 | 1541 | printk(KERN_WARNING "ipmi_si: Invalid register size: %d\n", |
1da177e4 LT |
1542 | info->io.regsize); |
1543 | return -EINVAL; | |
1544 | } | |
1545 | ||
c305e3d3 CM |
1546 | /* |
1547 | * Calculate the total amount of memory to claim. This is an | |
1da177e4 LT |
1548 | * unusual looking calculation, but it avoids claiming any |
1549 | * more memory than it has to. It will claim everything | |
1550 | * between the first address to the end of the last full | |
c305e3d3 CM |
1551 | * register. |
1552 | */ | |
1da177e4 LT |
1553 | mapsize = ((info->io_size * info->io.regspacing) |
1554 | - (info->io.regspacing - info->io.regsize)); | |
1555 | ||
b0defcdb | 1556 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1557 | return -EIO; |
1558 | ||
b0defcdb | 1559 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1560 | if (info->io.addr == NULL) { |
b0defcdb | 1561 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1562 | return -EIO; |
1563 | } | |
1564 | return 0; | |
1565 | } | |
1566 | ||
b361e27b CM |
1567 | /* |
1568 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1569 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1570 | * Options are: | |
1571 | * rsp=<regspacing> | |
1572 | * rsi=<regsize> | |
1573 | * rsh=<regshift> | |
1574 | * irq=<irq> | |
1575 | * ipmb=<ipmb addr> | |
1576 | */ | |
1577 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1578 | struct hotmod_vals { | |
1579 | char *name; | |
1580 | int val; | |
1581 | }; | |
1582 | static struct hotmod_vals hotmod_ops[] = { | |
1583 | { "add", HM_ADD }, | |
1584 | { "remove", HM_REMOVE }, | |
1585 | { NULL } | |
1586 | }; | |
1587 | static struct hotmod_vals hotmod_si[] = { | |
1588 | { "kcs", SI_KCS }, | |
1589 | { "smic", SI_SMIC }, | |
1590 | { "bt", SI_BT }, | |
1591 | { NULL } | |
1592 | }; | |
1593 | static struct hotmod_vals hotmod_as[] = { | |
1594 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1595 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1596 | { NULL } | |
1597 | }; | |
1d5636cc | 1598 | |
b361e27b CM |
1599 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1600 | { | |
1601 | char *s; | |
1602 | int i; | |
1603 | ||
1604 | s = strchr(*curr, ','); | |
1605 | if (!s) { | |
1606 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1607 | return -EINVAL; | |
1608 | } | |
1609 | *s = '\0'; | |
1610 | s++; | |
1611 | for (i = 0; hotmod_ops[i].name; i++) { | |
1d5636cc | 1612 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1613 | *val = v[i].val; |
1614 | *curr = s; | |
1615 | return 0; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1620 | return -EINVAL; | |
1621 | } | |
1622 | ||
1d5636cc CM |
1623 | static int check_hotmod_int_op(const char *curr, const char *option, |
1624 | const char *name, int *val) | |
1625 | { | |
1626 | char *n; | |
1627 | ||
1628 | if (strcmp(curr, name) == 0) { | |
1629 | if (!option) { | |
1630 | printk(KERN_WARNING PFX | |
1631 | "No option given for '%s'\n", | |
1632 | curr); | |
1633 | return -EINVAL; | |
1634 | } | |
1635 | *val = simple_strtoul(option, &n, 0); | |
1636 | if ((*n != '\0') || (*option == '\0')) { | |
1637 | printk(KERN_WARNING PFX | |
1638 | "Bad option given for '%s'\n", | |
1639 | curr); | |
1640 | return -EINVAL; | |
1641 | } | |
1642 | return 1; | |
1643 | } | |
1644 | return 0; | |
1645 | } | |
1646 | ||
b361e27b CM |
1647 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1648 | { | |
1649 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1650 | int rv; |
b361e27b CM |
1651 | char *next, *curr, *s, *n, *o; |
1652 | enum hotmod_op op; | |
1653 | enum si_type si_type; | |
1654 | int addr_space; | |
1655 | unsigned long addr; | |
1656 | int regspacing; | |
1657 | int regsize; | |
1658 | int regshift; | |
1659 | int irq; | |
1660 | int ipmb; | |
1661 | int ival; | |
1d5636cc | 1662 | int len; |
b361e27b CM |
1663 | struct smi_info *info; |
1664 | ||
1665 | if (!str) | |
1666 | return -ENOMEM; | |
1667 | ||
1668 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1669 | len = strlen(str); |
1670 | ival = len - 1; | |
b361e27b CM |
1671 | while ((ival >= 0) && isspace(str[ival])) { |
1672 | str[ival] = '\0'; | |
1673 | ival--; | |
1674 | } | |
1675 | ||
1676 | for (curr = str; curr; curr = next) { | |
1677 | regspacing = 1; | |
1678 | regsize = 1; | |
1679 | regshift = 0; | |
1680 | irq = 0; | |
2f95d513 | 1681 | ipmb = 0; /* Choose the default if not specified */ |
b361e27b CM |
1682 | |
1683 | next = strchr(curr, ':'); | |
1684 | if (next) { | |
1685 | *next = '\0'; | |
1686 | next++; | |
1687 | } | |
1688 | ||
1689 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1690 | if (rv) | |
1691 | break; | |
1692 | op = ival; | |
1693 | ||
1694 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1695 | if (rv) | |
1696 | break; | |
1697 | si_type = ival; | |
1698 | ||
1699 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1700 | if (rv) | |
1701 | break; | |
1702 | ||
1703 | s = strchr(curr, ','); | |
1704 | if (s) { | |
1705 | *s = '\0'; | |
1706 | s++; | |
1707 | } | |
1708 | addr = simple_strtoul(curr, &n, 0); | |
1709 | if ((*n != '\0') || (*curr == '\0')) { | |
1710 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1711 | " '%s'\n", curr); | |
1712 | break; | |
1713 | } | |
1714 | ||
1715 | while (s) { | |
1716 | curr = s; | |
1717 | s = strchr(curr, ','); | |
1718 | if (s) { | |
1719 | *s = '\0'; | |
1720 | s++; | |
1721 | } | |
1722 | o = strchr(curr, '='); | |
1723 | if (o) { | |
1724 | *o = '\0'; | |
1725 | o++; | |
1726 | } | |
1d5636cc CM |
1727 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1728 | if (rv < 0) | |
b361e27b | 1729 | goto out; |
1d5636cc CM |
1730 | else if (rv) |
1731 | continue; | |
1732 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1733 | if (rv < 0) | |
1734 | goto out; | |
1735 | else if (rv) | |
1736 | continue; | |
1737 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1738 | if (rv < 0) | |
1739 | goto out; | |
1740 | else if (rv) | |
1741 | continue; | |
1742 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1743 | if (rv < 0) | |
1744 | goto out; | |
1745 | else if (rv) | |
1746 | continue; | |
1747 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1748 | if (rv < 0) | |
1749 | goto out; | |
1750 | else if (rv) | |
1751 | continue; | |
1752 | ||
1753 | rv = -EINVAL; | |
1754 | printk(KERN_WARNING PFX | |
1755 | "Invalid hotmod option '%s'\n", | |
1756 | curr); | |
1757 | goto out; | |
b361e27b CM |
1758 | } |
1759 | ||
1760 | if (op == HM_ADD) { | |
1761 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1762 | if (!info) { | |
1763 | rv = -ENOMEM; | |
1764 | goto out; | |
1765 | } | |
1766 | ||
5fedc4a2 | 1767 | info->addr_source = SI_HOTMOD; |
b361e27b CM |
1768 | info->si_type = si_type; |
1769 | info->io.addr_data = addr; | |
1770 | info->io.addr_type = addr_space; | |
1771 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1772 | info->io_setup = mem_setup; | |
1773 | else | |
1774 | info->io_setup = port_setup; | |
1775 | ||
1776 | info->io.addr = NULL; | |
1777 | info->io.regspacing = regspacing; | |
1778 | if (!info->io.regspacing) | |
1779 | info->io.regspacing = DEFAULT_REGSPACING; | |
1780 | info->io.regsize = regsize; | |
1781 | if (!info->io.regsize) | |
1782 | info->io.regsize = DEFAULT_REGSPACING; | |
1783 | info->io.regshift = regshift; | |
1784 | info->irq = irq; | |
1785 | if (info->irq) | |
1786 | info->irq_setup = std_irq_setup; | |
1787 | info->slave_addr = ipmb; | |
1788 | ||
2407d77a MG |
1789 | if (!add_smi(info)) |
1790 | if (try_smi_init(info)) | |
1791 | cleanup_one_si(info); | |
b361e27b CM |
1792 | } else { |
1793 | /* remove */ | |
1794 | struct smi_info *e, *tmp_e; | |
1795 | ||
1796 | mutex_lock(&smi_infos_lock); | |
1797 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1798 | if (e->io.addr_type != addr_space) | |
1799 | continue; | |
1800 | if (e->si_type != si_type) | |
1801 | continue; | |
1802 | if (e->io.addr_data == addr) | |
1803 | cleanup_one_si(e); | |
1804 | } | |
1805 | mutex_unlock(&smi_infos_lock); | |
1806 | } | |
1807 | } | |
1d5636cc | 1808 | rv = len; |
b361e27b CM |
1809 | out: |
1810 | kfree(str); | |
1811 | return rv; | |
1812 | } | |
b0defcdb CM |
1813 | |
1814 | static __devinit void hardcode_find_bmc(void) | |
1da177e4 | 1815 | { |
b0defcdb | 1816 | int i; |
1da177e4 LT |
1817 | struct smi_info *info; |
1818 | ||
b0defcdb CM |
1819 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1820 | if (!ports[i] && !addrs[i]) | |
1821 | continue; | |
1da177e4 | 1822 | |
b0defcdb CM |
1823 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1824 | if (!info) | |
1825 | return; | |
1da177e4 | 1826 | |
5fedc4a2 | 1827 | info->addr_source = SI_HARDCODED; |
1da177e4 | 1828 | |
1d5636cc | 1829 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1830 | info->si_type = SI_KCS; |
1d5636cc | 1831 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1832 | info->si_type = SI_SMIC; |
1d5636cc | 1833 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1834 | info->si_type = SI_BT; |
1835 | } else { | |
1836 | printk(KERN_WARNING | |
1837 | "ipmi_si: Interface type specified " | |
1838 | "for interface %d, was invalid: %s\n", | |
1839 | i, si_type[i]); | |
1840 | kfree(info); | |
1841 | continue; | |
1842 | } | |
1da177e4 | 1843 | |
b0defcdb CM |
1844 | if (ports[i]) { |
1845 | /* An I/O port */ | |
1846 | info->io_setup = port_setup; | |
1847 | info->io.addr_data = ports[i]; | |
1848 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1849 | } else if (addrs[i]) { | |
1850 | /* A memory port */ | |
1851 | info->io_setup = mem_setup; | |
1852 | info->io.addr_data = addrs[i]; | |
1853 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1854 | } else { | |
1855 | printk(KERN_WARNING | |
1856 | "ipmi_si: Interface type specified " | |
1857 | "for interface %d, " | |
1858 | "but port and address were not set or " | |
1859 | "set to zero.\n", i); | |
1860 | kfree(info); | |
1861 | continue; | |
1862 | } | |
1da177e4 | 1863 | |
b0defcdb CM |
1864 | info->io.addr = NULL; |
1865 | info->io.regspacing = regspacings[i]; | |
1866 | if (!info->io.regspacing) | |
1867 | info->io.regspacing = DEFAULT_REGSPACING; | |
1868 | info->io.regsize = regsizes[i]; | |
1869 | if (!info->io.regsize) | |
1870 | info->io.regsize = DEFAULT_REGSPACING; | |
1871 | info->io.regshift = regshifts[i]; | |
1872 | info->irq = irqs[i]; | |
1873 | if (info->irq) | |
1874 | info->irq_setup = std_irq_setup; | |
2f95d513 | 1875 | info->slave_addr = slave_addrs[i]; |
1da177e4 | 1876 | |
2407d77a MG |
1877 | if (!add_smi(info)) |
1878 | if (try_smi_init(info)) | |
1879 | cleanup_one_si(info); | |
b0defcdb CM |
1880 | } |
1881 | } | |
1da177e4 | 1882 | |
8466361a | 1883 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1884 | |
1885 | #include <linux/acpi.h> | |
1886 | ||
c305e3d3 CM |
1887 | /* |
1888 | * Once we get an ACPI failure, we don't try any more, because we go | |
1889 | * through the tables sequentially. Once we don't find a table, there | |
1890 | * are no more. | |
1891 | */ | |
0c8204b3 | 1892 | static int acpi_failure; |
1da177e4 LT |
1893 | |
1894 | /* For GPE-type interrupts. */ | |
1895 | static u32 ipmi_acpi_gpe(void *context) | |
1896 | { | |
1897 | struct smi_info *smi_info = context; | |
1898 | unsigned long flags; | |
1899 | #ifdef DEBUG_TIMING | |
1900 | struct timeval t; | |
1901 | #endif | |
1902 | ||
1903 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1904 | ||
64959e2d | 1905 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1906 | |
1da177e4 LT |
1907 | #ifdef DEBUG_TIMING |
1908 | do_gettimeofday(&t); | |
1909 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1910 | #endif | |
1911 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1912 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1913 | ||
1914 | return ACPI_INTERRUPT_HANDLED; | |
1915 | } | |
1916 | ||
b0defcdb CM |
1917 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
1918 | { | |
1919 | if (!info->irq) | |
1920 | return; | |
1921 | ||
1922 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1923 | } | |
1924 | ||
1da177e4 LT |
1925 | static int acpi_gpe_irq_setup(struct smi_info *info) |
1926 | { | |
1927 | acpi_status status; | |
1928 | ||
b0defcdb | 1929 | if (!info->irq) |
1da177e4 LT |
1930 | return 0; |
1931 | ||
1932 | /* FIXME - is level triggered right? */ | |
1933 | status = acpi_install_gpe_handler(NULL, | |
1934 | info->irq, | |
1935 | ACPI_GPE_LEVEL_TRIGGERED, | |
1936 | &ipmi_acpi_gpe, | |
1937 | info); | |
1938 | if (status != AE_OK) { | |
1939 | printk(KERN_WARNING | |
1940 | "ipmi_si: %s unable to claim ACPI GPE %d," | |
1941 | " running polled\n", | |
1942 | DEVICE_NAME, info->irq); | |
1943 | info->irq = 0; | |
1944 | return -EINVAL; | |
1945 | } else { | |
b0defcdb | 1946 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
1da177e4 LT |
1947 | printk(" Using ACPI GPE %d\n", info->irq); |
1948 | return 0; | |
1949 | } | |
1950 | } | |
1951 | ||
1da177e4 LT |
1952 | /* |
1953 | * Defined at | |
c305e3d3 CM |
1954 | * http://h21007.www2.hp.com/dspp/files/unprotected/devresource/ |
1955 | * Docs/TechPapers/IA64/hpspmi.pdf | |
1da177e4 LT |
1956 | */ |
1957 | struct SPMITable { | |
1958 | s8 Signature[4]; | |
1959 | u32 Length; | |
1960 | u8 Revision; | |
1961 | u8 Checksum; | |
1962 | s8 OEMID[6]; | |
1963 | s8 OEMTableID[8]; | |
1964 | s8 OEMRevision[4]; | |
1965 | s8 CreatorID[4]; | |
1966 | s8 CreatorRevision[4]; | |
1967 | u8 InterfaceType; | |
1968 | u8 IPMIlegacy; | |
1969 | s16 SpecificationRevision; | |
1970 | ||
1971 | /* | |
1972 | * Bit 0 - SCI interrupt supported | |
1973 | * Bit 1 - I/O APIC/SAPIC | |
1974 | */ | |
1975 | u8 InterruptType; | |
1976 | ||
c305e3d3 CM |
1977 | /* |
1978 | * If bit 0 of InterruptType is set, then this is the SCI | |
1979 | * interrupt in the GPEx_STS register. | |
1980 | */ | |
1da177e4 LT |
1981 | u8 GPE; |
1982 | ||
1983 | s16 Reserved; | |
1984 | ||
c305e3d3 CM |
1985 | /* |
1986 | * If bit 1 of InterruptType is set, then this is the I/O | |
1987 | * APIC/SAPIC interrupt. | |
1988 | */ | |
1da177e4 LT |
1989 | u32 GlobalSystemInterrupt; |
1990 | ||
1991 | /* The actual register address. */ | |
1992 | struct acpi_generic_address addr; | |
1993 | ||
1994 | u8 UID[4]; | |
1995 | ||
1996 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
1997 | }; | |
1998 | ||
18a3e0bf | 1999 | static __devinit int try_init_spmi(struct SPMITable *spmi) |
1da177e4 LT |
2000 | { |
2001 | struct smi_info *info; | |
1da177e4 LT |
2002 | u8 addr_space; |
2003 | ||
1da177e4 LT |
2004 | if (spmi->IPMIlegacy != 1) { |
2005 | printk(KERN_INFO "IPMI: Bad SPMI legacy %d\n", spmi->IPMIlegacy); | |
c305e3d3 | 2006 | return -ENODEV; |
1da177e4 LT |
2007 | } |
2008 | ||
15a58ed1 | 2009 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
1da177e4 LT |
2010 | addr_space = IPMI_MEM_ADDR_SPACE; |
2011 | else | |
2012 | addr_space = IPMI_IO_ADDR_SPACE; | |
b0defcdb CM |
2013 | |
2014 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2015 | if (!info) { | |
2016 | printk(KERN_ERR "ipmi_si: Could not allocate SI data (3)\n"); | |
2017 | return -ENOMEM; | |
2018 | } | |
2019 | ||
5fedc4a2 | 2020 | info->addr_source = SI_SPMI; |
1da177e4 | 2021 | |
1da177e4 | 2022 | /* Figure out the interface type. */ |
c305e3d3 | 2023 | switch (spmi->InterfaceType) { |
1da177e4 | 2024 | case 1: /* KCS */ |
b0defcdb | 2025 | info->si_type = SI_KCS; |
1da177e4 | 2026 | break; |
1da177e4 | 2027 | case 2: /* SMIC */ |
b0defcdb | 2028 | info->si_type = SI_SMIC; |
1da177e4 | 2029 | break; |
1da177e4 | 2030 | case 3: /* BT */ |
b0defcdb | 2031 | info->si_type = SI_BT; |
1da177e4 | 2032 | break; |
1da177e4 LT |
2033 | default: |
2034 | printk(KERN_INFO "ipmi_si: Unknown ACPI/SPMI SI type %d\n", | |
2035 | spmi->InterfaceType); | |
b0defcdb | 2036 | kfree(info); |
1da177e4 LT |
2037 | return -EIO; |
2038 | } | |
2039 | ||
1da177e4 LT |
2040 | if (spmi->InterruptType & 1) { |
2041 | /* We've got a GPE interrupt. */ | |
2042 | info->irq = spmi->GPE; | |
2043 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
2044 | } else if (spmi->InterruptType & 2) { |
2045 | /* We've got an APIC/SAPIC interrupt. */ | |
2046 | info->irq = spmi->GlobalSystemInterrupt; | |
2047 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
2048 | } else { |
2049 | /* Use the default interrupt setting. */ | |
2050 | info->irq = 0; | |
2051 | info->irq_setup = NULL; | |
2052 | } | |
2053 | ||
15a58ed1 | 2054 | if (spmi->addr.bit_width) { |
35bc37a0 | 2055 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 2056 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 2057 | } else { |
35bc37a0 CM |
2058 | info->io.regspacing = DEFAULT_REGSPACING; |
2059 | } | |
b0defcdb | 2060 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 2061 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 2062 | |
15a58ed1 | 2063 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 2064 | info->io_setup = mem_setup; |
8fe1425a | 2065 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
15a58ed1 | 2066 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 2067 | info->io_setup = port_setup; |
8fe1425a | 2068 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
2069 | } else { |
2070 | kfree(info); | |
c305e3d3 CM |
2071 | printk(KERN_WARNING |
2072 | "ipmi_si: Unknown ACPI I/O Address type\n"); | |
1da177e4 LT |
2073 | return -EIO; |
2074 | } | |
b0defcdb | 2075 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 2076 | |
2407d77a | 2077 | add_smi(info); |
1da177e4 | 2078 | |
1da177e4 LT |
2079 | return 0; |
2080 | } | |
b0defcdb | 2081 | |
18a3e0bf | 2082 | static __devinit void spmi_find_bmc(void) |
b0defcdb CM |
2083 | { |
2084 | acpi_status status; | |
2085 | struct SPMITable *spmi; | |
2086 | int i; | |
2087 | ||
2088 | if (acpi_disabled) | |
2089 | return; | |
2090 | ||
2091 | if (acpi_failure) | |
2092 | return; | |
2093 | ||
2094 | for (i = 0; ; i++) { | |
15a58ed1 AS |
2095 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
2096 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
2097 | if (status != AE_OK) |
2098 | return; | |
2099 | ||
18a3e0bf | 2100 | try_init_spmi(spmi); |
b0defcdb CM |
2101 | } |
2102 | } | |
9e368fa0 BH |
2103 | |
2104 | static int __devinit ipmi_pnp_probe(struct pnp_dev *dev, | |
2105 | const struct pnp_device_id *dev_id) | |
2106 | { | |
2107 | struct acpi_device *acpi_dev; | |
2108 | struct smi_info *info; | |
2109 | acpi_handle handle; | |
2110 | acpi_status status; | |
2111 | unsigned long long tmp; | |
2112 | ||
2113 | acpi_dev = pnp_acpi_device(dev); | |
2114 | if (!acpi_dev) | |
2115 | return -ENODEV; | |
2116 | ||
2117 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2118 | if (!info) | |
2119 | return -ENOMEM; | |
2120 | ||
5fedc4a2 | 2121 | info->addr_source = SI_ACPI; |
9e368fa0 BH |
2122 | |
2123 | handle = acpi_dev->handle; | |
2124 | ||
2125 | /* _IFT tells us the interface type: KCS, BT, etc */ | |
2126 | status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp); | |
2127 | if (ACPI_FAILURE(status)) | |
2128 | goto err_free; | |
2129 | ||
2130 | switch (tmp) { | |
2131 | case 1: | |
2132 | info->si_type = SI_KCS; | |
2133 | break; | |
2134 | case 2: | |
2135 | info->si_type = SI_SMIC; | |
2136 | break; | |
2137 | case 3: | |
2138 | info->si_type = SI_BT; | |
2139 | break; | |
2140 | default: | |
2141 | dev_info(&dev->dev, "unknown interface type %lld\n", tmp); | |
2142 | goto err_free; | |
2143 | } | |
2144 | ||
2145 | if (pnp_port_valid(dev, 0)) { | |
2146 | info->io_setup = port_setup; | |
2147 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2148 | info->io.addr_data = pnp_port_start(dev, 0); | |
2149 | } else if (pnp_mem_valid(dev, 0)) { | |
2150 | info->io_setup = mem_setup; | |
2151 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2152 | info->io.addr_data = pnp_mem_start(dev, 0); | |
2153 | } else { | |
2154 | dev_err(&dev->dev, "no I/O or memory address\n"); | |
2155 | goto err_free; | |
2156 | } | |
2157 | ||
2158 | info->io.regspacing = DEFAULT_REGSPACING; | |
2159 | info->io.regsize = DEFAULT_REGSPACING; | |
2160 | info->io.regshift = 0; | |
2161 | ||
2162 | /* If _GPE exists, use it; otherwise use standard interrupts */ | |
2163 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); | |
2164 | if (ACPI_SUCCESS(status)) { | |
2165 | info->irq = tmp; | |
2166 | info->irq_setup = acpi_gpe_irq_setup; | |
2167 | } else if (pnp_irq_valid(dev, 0)) { | |
2168 | info->irq = pnp_irq(dev, 0); | |
2169 | info->irq_setup = std_irq_setup; | |
2170 | } | |
2171 | ||
2172 | info->dev = &acpi_dev->dev; | |
2173 | pnp_set_drvdata(dev, info); | |
2174 | ||
2407d77a | 2175 | return add_smi(info); |
9e368fa0 BH |
2176 | |
2177 | err_free: | |
2178 | kfree(info); | |
2179 | return -EINVAL; | |
2180 | } | |
2181 | ||
2182 | static void __devexit ipmi_pnp_remove(struct pnp_dev *dev) | |
2183 | { | |
2184 | struct smi_info *info = pnp_get_drvdata(dev); | |
2185 | ||
2186 | cleanup_one_si(info); | |
2187 | } | |
2188 | ||
2189 | static const struct pnp_device_id pnp_dev_table[] = { | |
2190 | {"IPI0001", 0}, | |
2191 | {"", 0}, | |
2192 | }; | |
2193 | ||
2194 | static struct pnp_driver ipmi_pnp_driver = { | |
2195 | .name = DEVICE_NAME, | |
2196 | .probe = ipmi_pnp_probe, | |
2197 | .remove = __devexit_p(ipmi_pnp_remove), | |
2198 | .id_table = pnp_dev_table, | |
2199 | }; | |
1da177e4 LT |
2200 | #endif |
2201 | ||
a9fad4cc | 2202 | #ifdef CONFIG_DMI |
c305e3d3 | 2203 | struct dmi_ipmi_data { |
1da177e4 LT |
2204 | u8 type; |
2205 | u8 addr_space; | |
2206 | unsigned long base_addr; | |
2207 | u8 irq; | |
2208 | u8 offset; | |
2209 | u8 slave_addr; | |
b0defcdb | 2210 | }; |
1da177e4 | 2211 | |
1855256c | 2212 | static int __devinit decode_dmi(const struct dmi_header *dm, |
b0defcdb | 2213 | struct dmi_ipmi_data *dmi) |
1da177e4 | 2214 | { |
1855256c | 2215 | const u8 *data = (const u8 *)dm; |
1da177e4 LT |
2216 | unsigned long base_addr; |
2217 | u8 reg_spacing; | |
b224cd3a | 2218 | u8 len = dm->length; |
1da177e4 | 2219 | |
b0defcdb | 2220 | dmi->type = data[4]; |
1da177e4 LT |
2221 | |
2222 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
2223 | if (len >= 0x11) { | |
2224 | if (base_addr & 1) { | |
2225 | /* I/O */ | |
2226 | base_addr &= 0xFFFE; | |
b0defcdb | 2227 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
c305e3d3 | 2228 | } else |
1da177e4 | 2229 | /* Memory */ |
b0defcdb | 2230 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
c305e3d3 | 2231 | |
1da177e4 LT |
2232 | /* If bit 4 of byte 0x10 is set, then the lsb for the address |
2233 | is odd. */ | |
b0defcdb | 2234 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 2235 | |
b0defcdb | 2236 | dmi->irq = data[0x11]; |
1da177e4 LT |
2237 | |
2238 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 2239 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
c305e3d3 | 2240 | switch (reg_spacing) { |
1da177e4 | 2241 | case 0x00: /* Byte boundaries */ |
b0defcdb | 2242 | dmi->offset = 1; |
1da177e4 LT |
2243 | break; |
2244 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 2245 | dmi->offset = 4; |
1da177e4 LT |
2246 | break; |
2247 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 2248 | dmi->offset = 16; |
1da177e4 LT |
2249 | break; |
2250 | default: | |
2251 | /* Some other interface, just ignore it. */ | |
2252 | return -EIO; | |
2253 | } | |
2254 | } else { | |
2255 | /* Old DMI spec. */ | |
c305e3d3 CM |
2256 | /* |
2257 | * Note that technically, the lower bit of the base | |
92068801 CM |
2258 | * address should be 1 if the address is I/O and 0 if |
2259 | * the address is in memory. So many systems get that | |
2260 | * wrong (and all that I have seen are I/O) so we just | |
2261 | * ignore that bit and assume I/O. Systems that use | |
c305e3d3 CM |
2262 | * memory should use the newer spec, anyway. |
2263 | */ | |
b0defcdb CM |
2264 | dmi->base_addr = base_addr & 0xfffe; |
2265 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
2266 | dmi->offset = 1; | |
1da177e4 LT |
2267 | } |
2268 | ||
b0defcdb | 2269 | dmi->slave_addr = data[6]; |
1da177e4 | 2270 | |
b0defcdb | 2271 | return 0; |
1da177e4 LT |
2272 | } |
2273 | ||
b0defcdb | 2274 | static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 2275 | { |
b0defcdb | 2276 | struct smi_info *info; |
1da177e4 | 2277 | |
b0defcdb CM |
2278 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2279 | if (!info) { | |
2280 | printk(KERN_ERR | |
2281 | "ipmi_si: Could not allocate SI data\n"); | |
2282 | return; | |
1da177e4 | 2283 | } |
1da177e4 | 2284 | |
5fedc4a2 | 2285 | info->addr_source = SI_SMBIOS; |
1da177e4 | 2286 | |
e8b33617 | 2287 | switch (ipmi_data->type) { |
b0defcdb CM |
2288 | case 0x01: /* KCS */ |
2289 | info->si_type = SI_KCS; | |
2290 | break; | |
2291 | case 0x02: /* SMIC */ | |
2292 | info->si_type = SI_SMIC; | |
2293 | break; | |
2294 | case 0x03: /* BT */ | |
2295 | info->si_type = SI_BT; | |
2296 | break; | |
2297 | default: | |
80cd6920 | 2298 | kfree(info); |
b0defcdb | 2299 | return; |
1da177e4 | 2300 | } |
1da177e4 | 2301 | |
b0defcdb CM |
2302 | switch (ipmi_data->addr_space) { |
2303 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2304 | info->io_setup = mem_setup; |
b0defcdb CM |
2305 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2306 | break; | |
2307 | ||
2308 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2309 | info->io_setup = port_setup; |
b0defcdb CM |
2310 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2311 | break; | |
2312 | ||
2313 | default: | |
1da177e4 | 2314 | kfree(info); |
b0defcdb CM |
2315 | printk(KERN_WARNING |
2316 | "ipmi_si: Unknown SMBIOS I/O Address type: %d.\n", | |
2317 | ipmi_data->addr_space); | |
2318 | return; | |
1da177e4 | 2319 | } |
b0defcdb | 2320 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2321 | |
b0defcdb CM |
2322 | info->io.regspacing = ipmi_data->offset; |
2323 | if (!info->io.regspacing) | |
1da177e4 LT |
2324 | info->io.regspacing = DEFAULT_REGSPACING; |
2325 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2326 | info->io.regshift = 0; |
1da177e4 LT |
2327 | |
2328 | info->slave_addr = ipmi_data->slave_addr; | |
2329 | ||
b0defcdb CM |
2330 | info->irq = ipmi_data->irq; |
2331 | if (info->irq) | |
2332 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2333 | |
2407d77a | 2334 | add_smi(info); |
b0defcdb | 2335 | } |
1da177e4 | 2336 | |
b0defcdb CM |
2337 | static void __devinit dmi_find_bmc(void) |
2338 | { | |
1855256c | 2339 | const struct dmi_device *dev = NULL; |
b0defcdb CM |
2340 | struct dmi_ipmi_data data; |
2341 | int rv; | |
2342 | ||
2343 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2344 | memset(&data, 0, sizeof(data)); |
1855256c JG |
2345 | rv = decode_dmi((const struct dmi_header *) dev->device_data, |
2346 | &data); | |
b0defcdb CM |
2347 | if (!rv) |
2348 | try_init_dmi(&data); | |
2349 | } | |
1da177e4 | 2350 | } |
a9fad4cc | 2351 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2352 | |
2353 | #ifdef CONFIG_PCI | |
2354 | ||
b0defcdb CM |
2355 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2356 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2357 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2358 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2359 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2360 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2361 | ||
1da177e4 LT |
2362 | #define PCI_HP_VENDOR_ID 0x103C |
2363 | #define PCI_MMC_DEVICE_ID 0x121A | |
2364 | #define PCI_MMC_ADDR_CW 0x10 | |
2365 | ||
b0defcdb CM |
2366 | static void ipmi_pci_cleanup(struct smi_info *info) |
2367 | { | |
2368 | struct pci_dev *pdev = info->addr_source_data; | |
2369 | ||
2370 | pci_disable_device(pdev); | |
2371 | } | |
1da177e4 | 2372 | |
b0defcdb CM |
2373 | static int __devinit ipmi_pci_probe(struct pci_dev *pdev, |
2374 | const struct pci_device_id *ent) | |
1da177e4 | 2375 | { |
b0defcdb CM |
2376 | int rv; |
2377 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2378 | struct smi_info *info; | |
1da177e4 | 2379 | |
b0defcdb CM |
2380 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2381 | if (!info) | |
1cd441f9 | 2382 | return -ENOMEM; |
1da177e4 | 2383 | |
5fedc4a2 | 2384 | info->addr_source = SI_PCI; |
1da177e4 | 2385 | |
b0defcdb CM |
2386 | switch (class_type) { |
2387 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2388 | info->si_type = SI_SMIC; | |
2389 | break; | |
1da177e4 | 2390 | |
b0defcdb CM |
2391 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2392 | info->si_type = SI_KCS; | |
2393 | break; | |
2394 | ||
2395 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2396 | info->si_type = SI_BT; | |
2397 | break; | |
2398 | ||
2399 | default: | |
2400 | kfree(info); | |
2401 | printk(KERN_INFO "ipmi_si: %s: Unknown IPMI type: %d\n", | |
2402 | pci_name(pdev), class_type); | |
1cd441f9 | 2403 | return -ENOMEM; |
1da177e4 LT |
2404 | } |
2405 | ||
b0defcdb CM |
2406 | rv = pci_enable_device(pdev); |
2407 | if (rv) { | |
2408 | printk(KERN_ERR "ipmi_si: %s: couldn't enable PCI device\n", | |
2409 | pci_name(pdev)); | |
2410 | kfree(info); | |
2411 | return rv; | |
1da177e4 LT |
2412 | } |
2413 | ||
b0defcdb CM |
2414 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2415 | info->addr_source_data = pdev; | |
1da177e4 | 2416 | |
b0defcdb CM |
2417 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2418 | info->io_setup = port_setup; | |
2419 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2420 | } else { | |
2421 | info->io_setup = mem_setup; | |
2422 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2423 | } |
b0defcdb | 2424 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2425 | |
b0defcdb | 2426 | info->io.regspacing = DEFAULT_REGSPACING; |
1da177e4 | 2427 | info->io.regsize = DEFAULT_REGSPACING; |
b0defcdb | 2428 | info->io.regshift = 0; |
1da177e4 | 2429 | |
b0defcdb CM |
2430 | info->irq = pdev->irq; |
2431 | if (info->irq) | |
2432 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2433 | |
50c812b2 | 2434 | info->dev = &pdev->dev; |
fca3b747 | 2435 | pci_set_drvdata(pdev, info); |
50c812b2 | 2436 | |
2407d77a | 2437 | return add_smi(info); |
b0defcdb | 2438 | } |
1da177e4 | 2439 | |
b0defcdb CM |
2440 | static void __devexit ipmi_pci_remove(struct pci_dev *pdev) |
2441 | { | |
fca3b747 CM |
2442 | struct smi_info *info = pci_get_drvdata(pdev); |
2443 | cleanup_one_si(info); | |
b0defcdb | 2444 | } |
1da177e4 | 2445 | |
b0defcdb CM |
2446 | #ifdef CONFIG_PM |
2447 | static int ipmi_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |
2448 | { | |
1da177e4 LT |
2449 | return 0; |
2450 | } | |
1da177e4 | 2451 | |
b0defcdb | 2452 | static int ipmi_pci_resume(struct pci_dev *pdev) |
1da177e4 | 2453 | { |
b0defcdb CM |
2454 | return 0; |
2455 | } | |
1da177e4 | 2456 | #endif |
1da177e4 | 2457 | |
b0defcdb CM |
2458 | static struct pci_device_id ipmi_pci_devices[] = { |
2459 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
248bdd5e KC |
2460 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, |
2461 | { 0, } | |
b0defcdb CM |
2462 | }; |
2463 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2464 | ||
2465 | static struct pci_driver ipmi_pci_driver = { | |
c305e3d3 CM |
2466 | .name = DEVICE_NAME, |
2467 | .id_table = ipmi_pci_devices, | |
2468 | .probe = ipmi_pci_probe, | |
2469 | .remove = __devexit_p(ipmi_pci_remove), | |
b0defcdb | 2470 | #ifdef CONFIG_PM |
c305e3d3 CM |
2471 | .suspend = ipmi_pci_suspend, |
2472 | .resume = ipmi_pci_resume, | |
b0defcdb CM |
2473 | #endif |
2474 | }; | |
2475 | #endif /* CONFIG_PCI */ | |
1da177e4 LT |
2476 | |
2477 | ||
dba9b4f6 CM |
2478 | #ifdef CONFIG_PPC_OF |
2479 | static int __devinit ipmi_of_probe(struct of_device *dev, | |
2480 | const struct of_device_id *match) | |
2481 | { | |
2482 | struct smi_info *info; | |
2483 | struct resource resource; | |
2484 | const int *regsize, *regspacing, *regshift; | |
61c7a080 | 2485 | struct device_node *np = dev->dev.of_node; |
dba9b4f6 CM |
2486 | int ret; |
2487 | int proplen; | |
2488 | ||
2489 | dev_info(&dev->dev, PFX "probing via device tree\n"); | |
2490 | ||
2491 | ret = of_address_to_resource(np, 0, &resource); | |
2492 | if (ret) { | |
2493 | dev_warn(&dev->dev, PFX "invalid address from OF\n"); | |
2494 | return ret; | |
2495 | } | |
2496 | ||
9c25099d | 2497 | regsize = of_get_property(np, "reg-size", &proplen); |
dba9b4f6 CM |
2498 | if (regsize && proplen != 4) { |
2499 | dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); | |
2500 | return -EINVAL; | |
2501 | } | |
2502 | ||
9c25099d | 2503 | regspacing = of_get_property(np, "reg-spacing", &proplen); |
dba9b4f6 CM |
2504 | if (regspacing && proplen != 4) { |
2505 | dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); | |
2506 | return -EINVAL; | |
2507 | } | |
2508 | ||
9c25099d | 2509 | regshift = of_get_property(np, "reg-shift", &proplen); |
dba9b4f6 CM |
2510 | if (regshift && proplen != 4) { |
2511 | dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); | |
2512 | return -EINVAL; | |
2513 | } | |
2514 | ||
2515 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2516 | ||
2517 | if (!info) { | |
2518 | dev_err(&dev->dev, | |
2519 | PFX "could not allocate memory for OF probe\n"); | |
2520 | return -ENOMEM; | |
2521 | } | |
2522 | ||
2523 | info->si_type = (enum si_type) match->data; | |
5fedc4a2 | 2524 | info->addr_source = SI_DEVICETREE; |
dba9b4f6 CM |
2525 | info->irq_setup = std_irq_setup; |
2526 | ||
3b7ec117 NC |
2527 | if (resource.flags & IORESOURCE_IO) { |
2528 | info->io_setup = port_setup; | |
2529 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2530 | } else { | |
2531 | info->io_setup = mem_setup; | |
2532 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2533 | } | |
2534 | ||
dba9b4f6 CM |
2535 | info->io.addr_data = resource.start; |
2536 | ||
2537 | info->io.regsize = regsize ? *regsize : DEFAULT_REGSIZE; | |
2538 | info->io.regspacing = regspacing ? *regspacing : DEFAULT_REGSPACING; | |
2539 | info->io.regshift = regshift ? *regshift : 0; | |
2540 | ||
61c7a080 | 2541 | info->irq = irq_of_parse_and_map(dev->dev.of_node, 0); |
dba9b4f6 CM |
2542 | info->dev = &dev->dev; |
2543 | ||
32d21985 | 2544 | dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %x\n", |
dba9b4f6 CM |
2545 | info->io.addr_data, info->io.regsize, info->io.regspacing, |
2546 | info->irq); | |
2547 | ||
9de33df4 | 2548 | dev_set_drvdata(&dev->dev, info); |
dba9b4f6 | 2549 | |
2407d77a | 2550 | return add_smi(info); |
dba9b4f6 CM |
2551 | } |
2552 | ||
2553 | static int __devexit ipmi_of_remove(struct of_device *dev) | |
2554 | { | |
9de33df4 | 2555 | cleanup_one_si(dev_get_drvdata(&dev->dev)); |
dba9b4f6 CM |
2556 | return 0; |
2557 | } | |
2558 | ||
2559 | static struct of_device_id ipmi_match[] = | |
2560 | { | |
c305e3d3 CM |
2561 | { .type = "ipmi", .compatible = "ipmi-kcs", |
2562 | .data = (void *)(unsigned long) SI_KCS }, | |
2563 | { .type = "ipmi", .compatible = "ipmi-smic", | |
2564 | .data = (void *)(unsigned long) SI_SMIC }, | |
2565 | { .type = "ipmi", .compatible = "ipmi-bt", | |
2566 | .data = (void *)(unsigned long) SI_BT }, | |
dba9b4f6 CM |
2567 | {}, |
2568 | }; | |
2569 | ||
c305e3d3 | 2570 | static struct of_platform_driver ipmi_of_platform_driver = { |
4018294b GL |
2571 | .driver = { |
2572 | .name = "ipmi", | |
2573 | .owner = THIS_MODULE, | |
2574 | .of_match_table = ipmi_match, | |
2575 | }, | |
dba9b4f6 CM |
2576 | .probe = ipmi_of_probe, |
2577 | .remove = __devexit_p(ipmi_of_remove), | |
2578 | }; | |
2579 | #endif /* CONFIG_PPC_OF */ | |
2580 | ||
40112ae7 | 2581 | static int wait_for_msg_done(struct smi_info *smi_info) |
1da177e4 | 2582 | { |
50c812b2 | 2583 | enum si_sm_result smi_result; |
1da177e4 LT |
2584 | |
2585 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 2586 | for (;;) { |
c3e7e791 CM |
2587 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2588 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2589 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2590 | smi_result = smi_info->handlers->event( |
2591 | smi_info->si_sm, 100); | |
c305e3d3 | 2592 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
2593 | smi_result = smi_info->handlers->event( |
2594 | smi_info->si_sm, 0); | |
c305e3d3 | 2595 | } else |
1da177e4 LT |
2596 | break; |
2597 | } | |
40112ae7 | 2598 | if (smi_result == SI_SM_HOSED) |
c305e3d3 CM |
2599 | /* |
2600 | * We couldn't get the state machine to run, so whatever's at | |
2601 | * the port is probably not an IPMI SMI interface. | |
2602 | */ | |
40112ae7 CM |
2603 | return -ENODEV; |
2604 | ||
2605 | return 0; | |
2606 | } | |
2607 | ||
2608 | static int try_get_dev_id(struct smi_info *smi_info) | |
2609 | { | |
2610 | unsigned char msg[2]; | |
2611 | unsigned char *resp; | |
2612 | unsigned long resp_len; | |
2613 | int rv = 0; | |
2614 | ||
2615 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2616 | if (!resp) | |
2617 | return -ENOMEM; | |
2618 | ||
2619 | /* | |
2620 | * Do a Get Device ID command, since it comes back with some | |
2621 | * useful info. | |
2622 | */ | |
2623 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2624 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2625 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2626 | ||
2627 | rv = wait_for_msg_done(smi_info); | |
2628 | if (rv) | |
1da177e4 | 2629 | goto out; |
1da177e4 | 2630 | |
1da177e4 LT |
2631 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, |
2632 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 2633 | |
d8c98618 CM |
2634 | /* Check and record info from the get device id, in case we need it. */ |
2635 | rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); | |
1da177e4 LT |
2636 | |
2637 | out: | |
2638 | kfree(resp); | |
2639 | return rv; | |
2640 | } | |
2641 | ||
40112ae7 CM |
2642 | static int try_enable_event_buffer(struct smi_info *smi_info) |
2643 | { | |
2644 | unsigned char msg[3]; | |
2645 | unsigned char *resp; | |
2646 | unsigned long resp_len; | |
2647 | int rv = 0; | |
2648 | ||
2649 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2650 | if (!resp) | |
2651 | return -ENOMEM; | |
2652 | ||
2653 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2654 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
2655 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2656 | ||
2657 | rv = wait_for_msg_done(smi_info); | |
2658 | if (rv) { | |
2659 | printk(KERN_WARNING | |
2660 | "ipmi_si: Error getting response from get global," | |
2661 | " enables command, the event buffer is not" | |
2662 | " enabled.\n"); | |
2663 | goto out; | |
2664 | } | |
2665 | ||
2666 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2667 | resp, IPMI_MAX_MSG_LENGTH); | |
2668 | ||
2669 | if (resp_len < 4 || | |
2670 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2671 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
2672 | resp[2] != 0) { | |
2673 | printk(KERN_WARNING | |
2674 | "ipmi_si: Invalid return from get global" | |
2675 | " enables command, cannot enable the event" | |
2676 | " buffer.\n"); | |
2677 | rv = -EINVAL; | |
2678 | goto out; | |
2679 | } | |
2680 | ||
2681 | if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) | |
2682 | /* buffer is already enabled, nothing to do. */ | |
2683 | goto out; | |
2684 | ||
2685 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2686 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
2687 | msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; | |
2688 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
2689 | ||
2690 | rv = wait_for_msg_done(smi_info); | |
2691 | if (rv) { | |
2692 | printk(KERN_WARNING | |
2693 | "ipmi_si: Error getting response from set global," | |
2694 | " enables command, the event buffer is not" | |
2695 | " enabled.\n"); | |
2696 | goto out; | |
2697 | } | |
2698 | ||
2699 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2700 | resp, IPMI_MAX_MSG_LENGTH); | |
2701 | ||
2702 | if (resp_len < 3 || | |
2703 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2704 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
2705 | printk(KERN_WARNING | |
2706 | "ipmi_si: Invalid return from get global," | |
2707 | "enables command, not enable the event" | |
2708 | " buffer.\n"); | |
2709 | rv = -EINVAL; | |
2710 | goto out; | |
2711 | } | |
2712 | ||
2713 | if (resp[2] != 0) | |
2714 | /* | |
2715 | * An error when setting the event buffer bit means | |
2716 | * that the event buffer is not supported. | |
2717 | */ | |
2718 | rv = -ENOENT; | |
2719 | out: | |
2720 | kfree(resp); | |
2721 | return rv; | |
2722 | } | |
2723 | ||
1da177e4 LT |
2724 | static int type_file_read_proc(char *page, char **start, off_t off, |
2725 | int count, int *eof, void *data) | |
2726 | { | |
1da177e4 LT |
2727 | struct smi_info *smi = data; |
2728 | ||
b361e27b | 2729 | return sprintf(page, "%s\n", si_to_str[smi->si_type]); |
1da177e4 LT |
2730 | } |
2731 | ||
2732 | static int stat_file_read_proc(char *page, char **start, off_t off, | |
2733 | int count, int *eof, void *data) | |
2734 | { | |
2735 | char *out = (char *) page; | |
2736 | struct smi_info *smi = data; | |
2737 | ||
2738 | out += sprintf(out, "interrupts_enabled: %d\n", | |
b0defcdb | 2739 | smi->irq && !smi->interrupt_disabled); |
64959e2d CM |
2740 | out += sprintf(out, "short_timeouts: %u\n", |
2741 | smi_get_stat(smi, short_timeouts)); | |
2742 | out += sprintf(out, "long_timeouts: %u\n", | |
2743 | smi_get_stat(smi, long_timeouts)); | |
64959e2d CM |
2744 | out += sprintf(out, "idles: %u\n", |
2745 | smi_get_stat(smi, idles)); | |
2746 | out += sprintf(out, "interrupts: %u\n", | |
2747 | smi_get_stat(smi, interrupts)); | |
2748 | out += sprintf(out, "attentions: %u\n", | |
2749 | smi_get_stat(smi, attentions)); | |
2750 | out += sprintf(out, "flag_fetches: %u\n", | |
2751 | smi_get_stat(smi, flag_fetches)); | |
2752 | out += sprintf(out, "hosed_count: %u\n", | |
2753 | smi_get_stat(smi, hosed_count)); | |
2754 | out += sprintf(out, "complete_transactions: %u\n", | |
2755 | smi_get_stat(smi, complete_transactions)); | |
2756 | out += sprintf(out, "events: %u\n", | |
2757 | smi_get_stat(smi, events)); | |
2758 | out += sprintf(out, "watchdog_pretimeouts: %u\n", | |
2759 | smi_get_stat(smi, watchdog_pretimeouts)); | |
2760 | out += sprintf(out, "incoming_messages: %u\n", | |
2761 | smi_get_stat(smi, incoming_messages)); | |
1da177e4 | 2762 | |
b361e27b CM |
2763 | return out - page; |
2764 | } | |
2765 | ||
2766 | static int param_read_proc(char *page, char **start, off_t off, | |
2767 | int count, int *eof, void *data) | |
2768 | { | |
2769 | struct smi_info *smi = data; | |
2770 | ||
2771 | return sprintf(page, | |
2772 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", | |
2773 | si_to_str[smi->si_type], | |
2774 | addr_space_to_str[smi->io.addr_type], | |
2775 | smi->io.addr_data, | |
2776 | smi->io.regspacing, | |
2777 | smi->io.regsize, | |
2778 | smi->io.regshift, | |
2779 | smi->irq, | |
2780 | smi->slave_addr); | |
1da177e4 LT |
2781 | } |
2782 | ||
3ae0e0f9 CM |
2783 | /* |
2784 | * oem_data_avail_to_receive_msg_avail | |
2785 | * @info - smi_info structure with msg_flags set | |
2786 | * | |
2787 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
2788 | * Returns 1 indicating need to re-run handle_flags(). | |
2789 | */ | |
2790 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
2791 | { | |
e8b33617 | 2792 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 2793 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
2794 | return 1; |
2795 | } | |
2796 | ||
2797 | /* | |
2798 | * setup_dell_poweredge_oem_data_handler | |
2799 | * @info - smi_info.device_id must be populated | |
2800 | * | |
2801 | * Systems that match, but have firmware version < 1.40 may assert | |
2802 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
2803 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
2804 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
2805 | * as RECEIVE_MSG_AVAIL instead. | |
2806 | * | |
2807 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
2808 | * assert the OEM[012] bits, and if it did, the driver would have to | |
2809 | * change to handle that properly, we don't actually check for the | |
2810 | * firmware version. | |
2811 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
2812 | * Device Revision = 0x80 | |
2813 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
2814 | * Firmware Revision2 = 0x40 BCD encoded | |
2815 | * IPMI Version = 0x51 IPMI 1.5 | |
2816 | * Manufacturer ID = A2 02 00 Dell IANA | |
2817 | * | |
d5a2b89a CM |
2818 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
2819 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
2820 | * | |
3ae0e0f9 CM |
2821 | */ |
2822 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
2823 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
2824 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 2825 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
2826 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
2827 | { | |
2828 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2829 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
2830 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
2831 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 2832 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
2833 | smi_info->oem_data_avail_handler = |
2834 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
2835 | } else if (ipmi_version_major(id) < 1 || |
2836 | (ipmi_version_major(id) == 1 && | |
2837 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
2838 | smi_info->oem_data_avail_handler = |
2839 | oem_data_avail_to_receive_msg_avail; | |
2840 | } | |
3ae0e0f9 CM |
2841 | } |
2842 | } | |
2843 | ||
ea94027b CM |
2844 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
2845 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
2846 | { | |
2847 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
2848 | ||
2849 | /* Make it a reponse */ | |
2850 | msg->rsp[0] = msg->data[0] | 4; | |
2851 | msg->rsp[1] = msg->data[1]; | |
2852 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
2853 | msg->rsp_size = 3; | |
2854 | smi_info->curr_msg = NULL; | |
2855 | deliver_recv_msg(smi_info, msg); | |
2856 | } | |
2857 | ||
2858 | /* | |
2859 | * dell_poweredge_bt_xaction_handler | |
2860 | * @info - smi_info.device_id must be populated | |
2861 | * | |
2862 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
2863 | * not respond to a Get SDR command if the length of the data | |
2864 | * requested is exactly 0x3A, which leads to command timeouts and no | |
2865 | * data returned. This intercepts such commands, and causes userspace | |
2866 | * callers to try again with a different-sized buffer, which succeeds. | |
2867 | */ | |
2868 | ||
2869 | #define STORAGE_NETFN 0x0A | |
2870 | #define STORAGE_CMD_GET_SDR 0x23 | |
2871 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
2872 | unsigned long unused, | |
2873 | void *in) | |
2874 | { | |
2875 | struct smi_info *smi_info = in; | |
2876 | unsigned char *data = smi_info->curr_msg->data; | |
2877 | unsigned int size = smi_info->curr_msg->data_size; | |
2878 | if (size >= 8 && | |
2879 | (data[0]>>2) == STORAGE_NETFN && | |
2880 | data[1] == STORAGE_CMD_GET_SDR && | |
2881 | data[7] == 0x3A) { | |
2882 | return_hosed_msg_badsize(smi_info); | |
2883 | return NOTIFY_STOP; | |
2884 | } | |
2885 | return NOTIFY_DONE; | |
2886 | } | |
2887 | ||
2888 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
2889 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
2890 | }; | |
2891 | ||
2892 | /* | |
2893 | * setup_dell_poweredge_bt_xaction_handler | |
2894 | * @info - smi_info.device_id must be filled in already | |
2895 | * | |
2896 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
2897 | * when we know what function to use there. | |
2898 | */ | |
2899 | static void | |
2900 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
2901 | { | |
2902 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2903 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
2904 | smi_info->si_type == SI_BT) |
2905 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
2906 | } | |
2907 | ||
3ae0e0f9 CM |
2908 | /* |
2909 | * setup_oem_data_handler | |
2910 | * @info - smi_info.device_id must be filled in already | |
2911 | * | |
2912 | * Fills in smi_info.device_id.oem_data_available_handler | |
2913 | * when we know what function to use there. | |
2914 | */ | |
2915 | ||
2916 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
2917 | { | |
2918 | setup_dell_poweredge_oem_data_handler(smi_info); | |
2919 | } | |
2920 | ||
ea94027b CM |
2921 | static void setup_xaction_handlers(struct smi_info *smi_info) |
2922 | { | |
2923 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
2924 | } | |
2925 | ||
a9a2c44f CM |
2926 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
2927 | { | |
453823ba | 2928 | if (smi_info->intf) { |
c305e3d3 CM |
2929 | /* |
2930 | * The timer and thread are only running if the | |
2931 | * interface has been started up and registered. | |
2932 | */ | |
453823ba CM |
2933 | if (smi_info->thread != NULL) |
2934 | kthread_stop(smi_info->thread); | |
2935 | del_timer_sync(&smi_info->si_timer); | |
2936 | } | |
a9a2c44f CM |
2937 | } |
2938 | ||
7420884c | 2939 | static __devinitdata struct ipmi_default_vals |
b0defcdb CM |
2940 | { |
2941 | int type; | |
2942 | int port; | |
7420884c | 2943 | } ipmi_defaults[] = |
b0defcdb CM |
2944 | { |
2945 | { .type = SI_KCS, .port = 0xca2 }, | |
2946 | { .type = SI_SMIC, .port = 0xca9 }, | |
2947 | { .type = SI_BT, .port = 0xe4 }, | |
2948 | { .port = 0 } | |
2949 | }; | |
2950 | ||
2951 | static __devinit void default_find_bmc(void) | |
2952 | { | |
2953 | struct smi_info *info; | |
2954 | int i; | |
2955 | ||
2956 | for (i = 0; ; i++) { | |
2957 | if (!ipmi_defaults[i].port) | |
2958 | break; | |
68e1ee62 | 2959 | #ifdef CONFIG_PPC |
4ff31d77 CK |
2960 | if (check_legacy_ioport(ipmi_defaults[i].port)) |
2961 | continue; | |
2962 | #endif | |
a09f4855 AM |
2963 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2964 | if (!info) | |
2965 | return; | |
4ff31d77 | 2966 | |
5fedc4a2 | 2967 | info->addr_source = SI_DEFAULT; |
b0defcdb CM |
2968 | |
2969 | info->si_type = ipmi_defaults[i].type; | |
2970 | info->io_setup = port_setup; | |
2971 | info->io.addr_data = ipmi_defaults[i].port; | |
2972 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2973 | ||
2974 | info->io.addr = NULL; | |
2975 | info->io.regspacing = DEFAULT_REGSPACING; | |
2976 | info->io.regsize = DEFAULT_REGSPACING; | |
2977 | info->io.regshift = 0; | |
2978 | ||
2407d77a MG |
2979 | if (add_smi(info) == 0) { |
2980 | if ((try_smi_init(info)) == 0) { | |
2981 | /* Found one... */ | |
2982 | printk(KERN_INFO "ipmi_si: Found default %s" | |
2983 | " state machine at %s address 0x%lx\n", | |
2984 | si_to_str[info->si_type], | |
2985 | addr_space_to_str[info->io.addr_type], | |
2986 | info->io.addr_data); | |
2987 | } else | |
2988 | cleanup_one_si(info); | |
b0defcdb CM |
2989 | } |
2990 | } | |
2991 | } | |
2992 | ||
2993 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 2994 | { |
b0defcdb | 2995 | struct smi_info *e; |
1da177e4 | 2996 | |
b0defcdb CM |
2997 | list_for_each_entry(e, &smi_infos, link) { |
2998 | if (e->io.addr_type != info->io.addr_type) | |
2999 | continue; | |
3000 | if (e->io.addr_data == info->io.addr_data) | |
3001 | return 0; | |
3002 | } | |
1da177e4 | 3003 | |
b0defcdb CM |
3004 | return 1; |
3005 | } | |
1da177e4 | 3006 | |
2407d77a | 3007 | static int add_smi(struct smi_info *new_smi) |
b0defcdb | 3008 | { |
2407d77a | 3009 | int rv = 0; |
b0defcdb | 3010 | |
2407d77a MG |
3011 | printk(KERN_INFO "ipmi_si: Adding %s-specified %s state machine", |
3012 | ipmi_addr_src_to_str[new_smi->addr_source], | |
3013 | si_to_str[new_smi->si_type]); | |
d6dfd131 | 3014 | mutex_lock(&smi_infos_lock); |
b0defcdb | 3015 | if (!is_new_interface(new_smi)) { |
2407d77a | 3016 | printk(KERN_CONT ": duplicate interface\n"); |
b0defcdb CM |
3017 | rv = -EBUSY; |
3018 | goto out_err; | |
3019 | } | |
1da177e4 | 3020 | |
2407d77a MG |
3021 | printk(KERN_CONT "\n"); |
3022 | ||
1da177e4 LT |
3023 | /* So we know not to free it unless we have allocated one. */ |
3024 | new_smi->intf = NULL; | |
3025 | new_smi->si_sm = NULL; | |
3026 | new_smi->handlers = NULL; | |
3027 | ||
2407d77a MG |
3028 | list_add_tail(&new_smi->link, &smi_infos); |
3029 | ||
3030 | out_err: | |
3031 | mutex_unlock(&smi_infos_lock); | |
3032 | return rv; | |
3033 | } | |
3034 | ||
3035 | static int try_smi_init(struct smi_info *new_smi) | |
3036 | { | |
3037 | int rv = 0; | |
3038 | int i; | |
3039 | ||
3040 | printk(KERN_INFO "ipmi_si: Trying %s-specified %s state" | |
3041 | " machine at %s address 0x%lx, slave address 0x%x," | |
3042 | " irq %d\n", | |
3043 | ipmi_addr_src_to_str[new_smi->addr_source], | |
3044 | si_to_str[new_smi->si_type], | |
3045 | addr_space_to_str[new_smi->io.addr_type], | |
3046 | new_smi->io.addr_data, | |
3047 | new_smi->slave_addr, new_smi->irq); | |
3048 | ||
b0defcdb CM |
3049 | switch (new_smi->si_type) { |
3050 | case SI_KCS: | |
1da177e4 | 3051 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
3052 | break; |
3053 | ||
3054 | case SI_SMIC: | |
1da177e4 | 3055 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
3056 | break; |
3057 | ||
3058 | case SI_BT: | |
1da177e4 | 3059 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
3060 | break; |
3061 | ||
3062 | default: | |
1da177e4 LT |
3063 | /* No support for anything else yet. */ |
3064 | rv = -EIO; | |
3065 | goto out_err; | |
3066 | } | |
3067 | ||
3068 | /* Allocate the state machine's data and initialize it. */ | |
3069 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 3070 | if (!new_smi->si_sm) { |
c305e3d3 | 3071 | printk(KERN_ERR "Could not allocate state machine memory\n"); |
1da177e4 LT |
3072 | rv = -ENOMEM; |
3073 | goto out_err; | |
3074 | } | |
3075 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
3076 | &new_smi->io); | |
3077 | ||
3078 | /* Now that we know the I/O size, we can set up the I/O. */ | |
3079 | rv = new_smi->io_setup(new_smi); | |
3080 | if (rv) { | |
c305e3d3 | 3081 | printk(KERN_ERR "Could not set up I/O space\n"); |
1da177e4 LT |
3082 | goto out_err; |
3083 | } | |
3084 | ||
3085 | spin_lock_init(&(new_smi->si_lock)); | |
3086 | spin_lock_init(&(new_smi->msg_lock)); | |
1da177e4 LT |
3087 | |
3088 | /* Do low-level detection first. */ | |
3089 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb CM |
3090 | if (new_smi->addr_source) |
3091 | printk(KERN_INFO "ipmi_si: Interface detection" | |
3092 | " failed\n"); | |
1da177e4 LT |
3093 | rv = -ENODEV; |
3094 | goto out_err; | |
3095 | } | |
3096 | ||
c305e3d3 CM |
3097 | /* |
3098 | * Attempt a get device id command. If it fails, we probably | |
3099 | * don't have a BMC here. | |
3100 | */ | |
1da177e4 | 3101 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
3102 | if (rv) { |
3103 | if (new_smi->addr_source) | |
3104 | printk(KERN_INFO "ipmi_si: There appears to be no BMC" | |
3105 | " at this location\n"); | |
1da177e4 | 3106 | goto out_err; |
b0defcdb | 3107 | } |
1da177e4 | 3108 | |
3ae0e0f9 | 3109 | setup_oem_data_handler(new_smi); |
ea94027b | 3110 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 3111 | |
1da177e4 LT |
3112 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); |
3113 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
3114 | new_smi->curr_msg = NULL; | |
3115 | atomic_set(&new_smi->req_events, 0); | |
3116 | new_smi->run_to_completion = 0; | |
64959e2d CM |
3117 | for (i = 0; i < SI_NUM_STATS; i++) |
3118 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 LT |
3119 | |
3120 | new_smi->interrupt_disabled = 0; | |
a9a2c44f | 3121 | atomic_set(&new_smi->stop_operation, 0); |
b0defcdb CM |
3122 | new_smi->intf_num = smi_num; |
3123 | smi_num++; | |
1da177e4 | 3124 | |
40112ae7 CM |
3125 | rv = try_enable_event_buffer(new_smi); |
3126 | if (rv == 0) | |
3127 | new_smi->has_event_buffer = 1; | |
3128 | ||
c305e3d3 CM |
3129 | /* |
3130 | * Start clearing the flags before we enable interrupts or the | |
3131 | * timer to avoid racing with the timer. | |
3132 | */ | |
1da177e4 LT |
3133 | start_clear_flags(new_smi); |
3134 | /* IRQ is defined to be set when non-zero. */ | |
3135 | if (new_smi->irq) | |
3136 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
3137 | ||
50c812b2 | 3138 | if (!new_smi->dev) { |
c305e3d3 CM |
3139 | /* |
3140 | * If we don't already have a device from something | |
3141 | * else (like PCI), then register a new one. | |
3142 | */ | |
50c812b2 CM |
3143 | new_smi->pdev = platform_device_alloc("ipmi_si", |
3144 | new_smi->intf_num); | |
8b32b5d0 | 3145 | if (!new_smi->pdev) { |
50c812b2 CM |
3146 | printk(KERN_ERR |
3147 | "ipmi_si_intf:" | |
3148 | " Unable to allocate platform device\n"); | |
453823ba | 3149 | goto out_err; |
50c812b2 CM |
3150 | } |
3151 | new_smi->dev = &new_smi->pdev->dev; | |
fe2d5ffc | 3152 | new_smi->dev->driver = &ipmi_driver.driver; |
50c812b2 | 3153 | |
b48f5457 | 3154 | rv = platform_device_add(new_smi->pdev); |
50c812b2 CM |
3155 | if (rv) { |
3156 | printk(KERN_ERR | |
3157 | "ipmi_si_intf:" | |
3158 | " Unable to register system interface device:" | |
3159 | " %d\n", | |
3160 | rv); | |
453823ba | 3161 | goto out_err; |
50c812b2 CM |
3162 | } |
3163 | new_smi->dev_registered = 1; | |
3164 | } | |
3165 | ||
1da177e4 LT |
3166 | rv = ipmi_register_smi(&handlers, |
3167 | new_smi, | |
50c812b2 CM |
3168 | &new_smi->device_id, |
3169 | new_smi->dev, | |
759643b8 | 3170 | "bmc", |
453823ba | 3171 | new_smi->slave_addr); |
1da177e4 LT |
3172 | if (rv) { |
3173 | printk(KERN_ERR | |
3174 | "ipmi_si: Unable to register device: error %d\n", | |
3175 | rv); | |
3176 | goto out_err_stop_timer; | |
3177 | } | |
3178 | ||
3179 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
fa68be0d | 3180 | type_file_read_proc, |
99b76233 | 3181 | new_smi); |
1da177e4 LT |
3182 | if (rv) { |
3183 | printk(KERN_ERR | |
3184 | "ipmi_si: Unable to create proc entry: %d\n", | |
3185 | rv); | |
3186 | goto out_err_stop_timer; | |
3187 | } | |
3188 | ||
3189 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
fa68be0d | 3190 | stat_file_read_proc, |
99b76233 | 3191 | new_smi); |
1da177e4 LT |
3192 | if (rv) { |
3193 | printk(KERN_ERR | |
3194 | "ipmi_si: Unable to create proc entry: %d\n", | |
3195 | rv); | |
3196 | goto out_err_stop_timer; | |
3197 | } | |
3198 | ||
b361e27b | 3199 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
fa68be0d | 3200 | param_read_proc, |
99b76233 | 3201 | new_smi); |
b361e27b CM |
3202 | if (rv) { |
3203 | printk(KERN_ERR | |
3204 | "ipmi_si: Unable to create proc entry: %d\n", | |
3205 | rv); | |
3206 | goto out_err_stop_timer; | |
3207 | } | |
3208 | ||
c305e3d3 CM |
3209 | printk(KERN_INFO "IPMI %s interface initialized\n", |
3210 | si_to_str[new_smi->si_type]); | |
1da177e4 LT |
3211 | |
3212 | return 0; | |
3213 | ||
3214 | out_err_stop_timer: | |
a9a2c44f CM |
3215 | atomic_inc(&new_smi->stop_operation); |
3216 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
3217 | |
3218 | out_err: | |
2407d77a MG |
3219 | new_smi->interrupt_disabled = 1; |
3220 | ||
3221 | if (new_smi->intf) { | |
1da177e4 | 3222 | ipmi_unregister_smi(new_smi->intf); |
2407d77a MG |
3223 | new_smi->intf = NULL; |
3224 | } | |
1da177e4 | 3225 | |
2407d77a | 3226 | if (new_smi->irq_cleanup) { |
b0defcdb | 3227 | new_smi->irq_cleanup(new_smi); |
2407d77a MG |
3228 | new_smi->irq_cleanup = NULL; |
3229 | } | |
1da177e4 | 3230 | |
c305e3d3 CM |
3231 | /* |
3232 | * Wait until we know that we are out of any interrupt | |
3233 | * handlers might have been running before we freed the | |
3234 | * interrupt. | |
3235 | */ | |
fbd568a3 | 3236 | synchronize_sched(); |
1da177e4 LT |
3237 | |
3238 | if (new_smi->si_sm) { | |
3239 | if (new_smi->handlers) | |
3240 | new_smi->handlers->cleanup(new_smi->si_sm); | |
3241 | kfree(new_smi->si_sm); | |
2407d77a | 3242 | new_smi->si_sm = NULL; |
1da177e4 | 3243 | } |
2407d77a | 3244 | if (new_smi->addr_source_cleanup) { |
b0defcdb | 3245 | new_smi->addr_source_cleanup(new_smi); |
2407d77a MG |
3246 | new_smi->addr_source_cleanup = NULL; |
3247 | } | |
3248 | if (new_smi->io_cleanup) { | |
7767e126 | 3249 | new_smi->io_cleanup(new_smi); |
2407d77a MG |
3250 | new_smi->io_cleanup = NULL; |
3251 | } | |
1da177e4 | 3252 | |
2407d77a | 3253 | if (new_smi->dev_registered) { |
50c812b2 | 3254 | platform_device_unregister(new_smi->pdev); |
2407d77a MG |
3255 | new_smi->dev_registered = 0; |
3256 | } | |
b0defcdb | 3257 | |
1da177e4 LT |
3258 | return rv; |
3259 | } | |
3260 | ||
b0defcdb | 3261 | static __devinit int init_ipmi_si(void) |
1da177e4 | 3262 | { |
1da177e4 LT |
3263 | int i; |
3264 | char *str; | |
50c812b2 | 3265 | int rv; |
2407d77a | 3266 | struct smi_info *e; |
1da177e4 LT |
3267 | |
3268 | if (initialized) | |
3269 | return 0; | |
3270 | initialized = 1; | |
3271 | ||
50c812b2 | 3272 | /* Register the device drivers. */ |
fe2d5ffc | 3273 | rv = driver_register(&ipmi_driver.driver); |
50c812b2 CM |
3274 | if (rv) { |
3275 | printk(KERN_ERR | |
3276 | "init_ipmi_si: Unable to register driver: %d\n", | |
3277 | rv); | |
3278 | return rv; | |
3279 | } | |
3280 | ||
3281 | ||
1da177e4 LT |
3282 | /* Parse out the si_type string into its components. */ |
3283 | str = si_type_str; | |
3284 | if (*str != '\0') { | |
e8b33617 | 3285 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
3286 | si_type[i] = str; |
3287 | str = strchr(str, ','); | |
3288 | if (str) { | |
3289 | *str = '\0'; | |
3290 | str++; | |
3291 | } else { | |
3292 | break; | |
3293 | } | |
3294 | } | |
3295 | } | |
3296 | ||
1fdd75bd | 3297 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 3298 | |
b0defcdb CM |
3299 | hardcode_find_bmc(); |
3300 | ||
a9fad4cc | 3301 | #ifdef CONFIG_DMI |
b224cd3a | 3302 | dmi_find_bmc(); |
1da177e4 LT |
3303 | #endif |
3304 | ||
b0defcdb | 3305 | #ifdef CONFIG_ACPI |
18a3e0bf | 3306 | spmi_find_bmc(); |
b0defcdb | 3307 | #endif |
27d0567a | 3308 | #ifdef CONFIG_ACPI |
9e368fa0 BH |
3309 | pnp_register_driver(&ipmi_pnp_driver); |
3310 | #endif | |
1da177e4 | 3311 | |
b0defcdb | 3312 | #ifdef CONFIG_PCI |
168b35a7 | 3313 | rv = pci_register_driver(&ipmi_pci_driver); |
c305e3d3 | 3314 | if (rv) |
168b35a7 CM |
3315 | printk(KERN_ERR |
3316 | "init_ipmi_si: Unable to register PCI driver: %d\n", | |
3317 | rv); | |
b0defcdb CM |
3318 | #endif |
3319 | ||
dba9b4f6 CM |
3320 | #ifdef CONFIG_PPC_OF |
3321 | of_register_platform_driver(&ipmi_of_platform_driver); | |
3322 | #endif | |
3323 | ||
2407d77a MG |
3324 | mutex_lock(&smi_infos_lock); |
3325 | list_for_each_entry(e, &smi_infos, link) { | |
3326 | if (!e->si_sm) | |
3327 | try_smi_init(e); | |
3328 | } | |
3329 | mutex_unlock(&smi_infos_lock); | |
3330 | ||
b0defcdb | 3331 | if (si_trydefaults) { |
d6dfd131 | 3332 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3333 | if (list_empty(&smi_infos)) { |
3334 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 3335 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3336 | default_find_bmc(); |
2407d77a | 3337 | } else |
d6dfd131 | 3338 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3339 | } |
3340 | ||
d6dfd131 | 3341 | mutex_lock(&smi_infos_lock); |
b361e27b | 3342 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 3343 | mutex_unlock(&smi_infos_lock); |
b0defcdb CM |
3344 | #ifdef CONFIG_PCI |
3345 | pci_unregister_driver(&ipmi_pci_driver); | |
3346 | #endif | |
10fb62e5 CK |
3347 | |
3348 | #ifdef CONFIG_PPC_OF | |
3349 | of_unregister_platform_driver(&ipmi_of_platform_driver); | |
3350 | #endif | |
fe2d5ffc | 3351 | driver_unregister(&ipmi_driver.driver); |
c305e3d3 CM |
3352 | printk(KERN_WARNING |
3353 | "ipmi_si: Unable to find any System Interface(s)\n"); | |
1da177e4 | 3354 | return -ENODEV; |
b0defcdb | 3355 | } else { |
d6dfd131 | 3356 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3357 | return 0; |
1da177e4 | 3358 | } |
1da177e4 LT |
3359 | } |
3360 | module_init(init_ipmi_si); | |
3361 | ||
b361e27b | 3362 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 | 3363 | { |
2407d77a | 3364 | int rv = 0; |
1da177e4 LT |
3365 | unsigned long flags; |
3366 | ||
b0defcdb | 3367 | if (!to_clean) |
1da177e4 LT |
3368 | return; |
3369 | ||
b0defcdb CM |
3370 | list_del(&to_clean->link); |
3371 | ||
ee6cd5f8 | 3372 | /* Tell the driver that we are shutting down. */ |
a9a2c44f | 3373 | atomic_inc(&to_clean->stop_operation); |
b0defcdb | 3374 | |
c305e3d3 CM |
3375 | /* |
3376 | * Make sure the timer and thread are stopped and will not run | |
3377 | * again. | |
3378 | */ | |
a9a2c44f | 3379 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 3380 | |
c305e3d3 CM |
3381 | /* |
3382 | * Timeouts are stopped, now make sure the interrupts are off | |
3383 | * for the device. A little tricky with locks to make sure | |
3384 | * there are no races. | |
3385 | */ | |
ee6cd5f8 CM |
3386 | spin_lock_irqsave(&to_clean->si_lock, flags); |
3387 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3388 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3389 | poll(to_clean); | |
3390 | schedule_timeout_uninterruptible(1); | |
3391 | spin_lock_irqsave(&to_clean->si_lock, flags); | |
3392 | } | |
3393 | disable_si_irq(to_clean); | |
3394 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3395 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3396 | poll(to_clean); | |
3397 | schedule_timeout_uninterruptible(1); | |
3398 | } | |
3399 | ||
3400 | /* Clean up interrupts and make sure that everything is done. */ | |
3401 | if (to_clean->irq_cleanup) | |
3402 | to_clean->irq_cleanup(to_clean); | |
e8b33617 | 3403 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 3404 | poll(to_clean); |
da4cd8df | 3405 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
3406 | } |
3407 | ||
2407d77a MG |
3408 | if (to_clean->intf) |
3409 | rv = ipmi_unregister_smi(to_clean->intf); | |
3410 | ||
1da177e4 LT |
3411 | if (rv) { |
3412 | printk(KERN_ERR | |
3413 | "ipmi_si: Unable to unregister device: errno=%d\n", | |
3414 | rv); | |
3415 | } | |
3416 | ||
2407d77a MG |
3417 | if (to_clean->handlers) |
3418 | to_clean->handlers->cleanup(to_clean->si_sm); | |
1da177e4 LT |
3419 | |
3420 | kfree(to_clean->si_sm); | |
3421 | ||
b0defcdb CM |
3422 | if (to_clean->addr_source_cleanup) |
3423 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
3424 | if (to_clean->io_cleanup) |
3425 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
3426 | |
3427 | if (to_clean->dev_registered) | |
3428 | platform_device_unregister(to_clean->pdev); | |
3429 | ||
3430 | kfree(to_clean); | |
1da177e4 LT |
3431 | } |
3432 | ||
3433 | static __exit void cleanup_ipmi_si(void) | |
3434 | { | |
b0defcdb | 3435 | struct smi_info *e, *tmp_e; |
1da177e4 | 3436 | |
b0defcdb | 3437 | if (!initialized) |
1da177e4 LT |
3438 | return; |
3439 | ||
b0defcdb CM |
3440 | #ifdef CONFIG_PCI |
3441 | pci_unregister_driver(&ipmi_pci_driver); | |
3442 | #endif | |
27d0567a | 3443 | #ifdef CONFIG_ACPI |
9e368fa0 BH |
3444 | pnp_unregister_driver(&ipmi_pnp_driver); |
3445 | #endif | |
b0defcdb | 3446 | |
dba9b4f6 CM |
3447 | #ifdef CONFIG_PPC_OF |
3448 | of_unregister_platform_driver(&ipmi_of_platform_driver); | |
3449 | #endif | |
3450 | ||
d6dfd131 | 3451 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3452 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
3453 | cleanup_one_si(e); | |
d6dfd131 | 3454 | mutex_unlock(&smi_infos_lock); |
50c812b2 | 3455 | |
fe2d5ffc | 3456 | driver_unregister(&ipmi_driver.driver); |
1da177e4 LT |
3457 | } |
3458 | module_exit(cleanup_ipmi_si); | |
3459 | ||
3460 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 3461 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
3462 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
3463 | " system interfaces."); |