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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ipmi_si.c | |
3 | * | |
4 | * The interface to the IPMI driver for the system interfaces (KCS, SMIC, | |
5 | * BT). | |
6 | * | |
7 | * Author: MontaVista Software, Inc. | |
8 | * Corey Minyard <minyard@mvista.com> | |
9 | * source@mvista.com | |
10 | * | |
11 | * Copyright 2002 MontaVista Software Inc. | |
dba9b4f6 | 12 | * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com> |
1da177e4 LT |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify it | |
15 | * under the terms of the GNU General Public License as published by the | |
16 | * Free Software Foundation; either version 2 of the License, or (at your | |
17 | * option) any later version. | |
18 | * | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
21 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
22 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
25 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
26 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
27 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
28 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
29 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License along | |
32 | * with this program; if not, write to the Free Software Foundation, Inc., | |
33 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * This file holds the "policy" for the interface to the SMI state | |
38 | * machine. It does the configuration, handles timers and interrupts, | |
39 | * and drives the real SMI state machine. | |
40 | */ | |
41 | ||
1da177e4 LT |
42 | #include <linux/module.h> |
43 | #include <linux/moduleparam.h> | |
1da177e4 | 44 | #include <linux/sched.h> |
07412736 | 45 | #include <linux/seq_file.h> |
1da177e4 LT |
46 | #include <linux/timer.h> |
47 | #include <linux/errno.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/ioport.h> | |
ea94027b | 54 | #include <linux/notifier.h> |
b0defcdb | 55 | #include <linux/mutex.h> |
e9a705a0 | 56 | #include <linux/kthread.h> |
1da177e4 | 57 | #include <asm/irq.h> |
1da177e4 LT |
58 | #include <linux/interrupt.h> |
59 | #include <linux/rcupdate.h> | |
16f4232c | 60 | #include <linux/ipmi.h> |
1da177e4 LT |
61 | #include <linux/ipmi_smi.h> |
62 | #include <asm/io.h> | |
63 | #include "ipmi_si_sm.h" | |
64 | #include <linux/init.h> | |
b224cd3a | 65 | #include <linux/dmi.h> |
b361e27b CM |
66 | #include <linux/string.h> |
67 | #include <linux/ctype.h> | |
9e368fa0 | 68 | #include <linux/pnp.h> |
11c675ce SR |
69 | #include <linux/of_device.h> |
70 | #include <linux/of_platform.h> | |
672d8eaf RH |
71 | #include <linux/of_address.h> |
72 | #include <linux/of_irq.h> | |
dba9b4f6 | 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 | static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI", |
111 | "ACPI", "SMBIOS", "PCI", | |
112 | "device-tree", "default" }; | |
113 | ||
50c812b2 CM |
114 | #define DEVICE_NAME "ipmi_si" |
115 | ||
a1e9c9dd | 116 | static struct platform_driver ipmi_driver; |
64959e2d CM |
117 | |
118 | /* | |
119 | * Indexes into stats[] in smi_info below. | |
120 | */ | |
ba8ff1c6 CM |
121 | enum si_stat_indexes { |
122 | /* | |
123 | * Number of times the driver requested a timer while an operation | |
124 | * was in progress. | |
125 | */ | |
126 | SI_STAT_short_timeouts = 0, | |
127 | ||
128 | /* | |
129 | * Number of times the driver requested a timer while nothing was in | |
130 | * progress. | |
131 | */ | |
132 | SI_STAT_long_timeouts, | |
133 | ||
134 | /* Number of times the interface was idle while being polled. */ | |
135 | SI_STAT_idles, | |
136 | ||
137 | /* Number of interrupts the driver handled. */ | |
138 | SI_STAT_interrupts, | |
139 | ||
140 | /* Number of time the driver got an ATTN from the hardware. */ | |
141 | SI_STAT_attentions, | |
64959e2d | 142 | |
ba8ff1c6 CM |
143 | /* Number of times the driver requested flags from the hardware. */ |
144 | SI_STAT_flag_fetches, | |
145 | ||
146 | /* Number of times the hardware didn't follow the state machine. */ | |
147 | SI_STAT_hosed_count, | |
148 | ||
149 | /* Number of completed messages. */ | |
150 | SI_STAT_complete_transactions, | |
151 | ||
152 | /* Number of IPMI events received from the hardware. */ | |
153 | SI_STAT_events, | |
154 | ||
155 | /* Number of watchdog pretimeouts. */ | |
156 | SI_STAT_watchdog_pretimeouts, | |
157 | ||
b3834be5 | 158 | /* Number of asynchronous messages received. */ |
ba8ff1c6 CM |
159 | SI_STAT_incoming_messages, |
160 | ||
161 | ||
162 | /* This *must* remain last, add new values above this. */ | |
163 | SI_NUM_STATS | |
164 | }; | |
64959e2d | 165 | |
c305e3d3 | 166 | struct smi_info { |
a9a2c44f | 167 | int intf_num; |
1da177e4 LT |
168 | ipmi_smi_t intf; |
169 | struct si_sm_data *si_sm; | |
170 | struct si_sm_handlers *handlers; | |
171 | enum si_type si_type; | |
172 | spinlock_t si_lock; | |
1da177e4 LT |
173 | struct list_head xmit_msgs; |
174 | struct list_head hp_xmit_msgs; | |
175 | struct ipmi_smi_msg *curr_msg; | |
176 | enum si_intf_state si_state; | |
177 | ||
c305e3d3 CM |
178 | /* |
179 | * Used to handle the various types of I/O that can occur with | |
180 | * IPMI | |
181 | */ | |
1da177e4 LT |
182 | struct si_sm_io io; |
183 | int (*io_setup)(struct smi_info *info); | |
184 | void (*io_cleanup)(struct smi_info *info); | |
185 | int (*irq_setup)(struct smi_info *info); | |
186 | void (*irq_cleanup)(struct smi_info *info); | |
187 | unsigned int io_size; | |
5fedc4a2 | 188 | enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */ |
b0defcdb CM |
189 | void (*addr_source_cleanup)(struct smi_info *info); |
190 | void *addr_source_data; | |
1da177e4 | 191 | |
c305e3d3 CM |
192 | /* |
193 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
194 | * when handle_flags() needs to be re-run or 0 indicating it | |
195 | * set si_state itself. | |
196 | */ | |
3ae0e0f9 CM |
197 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
198 | ||
c305e3d3 CM |
199 | /* |
200 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
201 | * is set to hold the flags until we are done handling everything | |
202 | * from the flags. | |
203 | */ | |
1da177e4 LT |
204 | #define RECEIVE_MSG_AVAIL 0x01 |
205 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
206 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
207 | #define OEM0_DATA_AVAIL 0x20 |
208 | #define OEM1_DATA_AVAIL 0x40 | |
209 | #define OEM2_DATA_AVAIL 0x80 | |
210 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
211 | OEM1_DATA_AVAIL | \ |
212 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
213 | unsigned char msg_flags; |
214 | ||
40112ae7 CM |
215 | /* Does the BMC have an event buffer? */ |
216 | char has_event_buffer; | |
217 | ||
c305e3d3 CM |
218 | /* |
219 | * If set to true, this will request events the next time the | |
220 | * state machine is idle. | |
221 | */ | |
1da177e4 LT |
222 | atomic_t req_events; |
223 | ||
c305e3d3 CM |
224 | /* |
225 | * If true, run the state machine to completion on every send | |
226 | * call. Generally used after a panic to make sure stuff goes | |
227 | * out. | |
228 | */ | |
1da177e4 LT |
229 | int run_to_completion; |
230 | ||
231 | /* The I/O port of an SI interface. */ | |
232 | int port; | |
233 | ||
c305e3d3 CM |
234 | /* |
235 | * The space between start addresses of the two ports. For | |
236 | * instance, if the first port is 0xca2 and the spacing is 4, then | |
237 | * the second port is 0xca6. | |
238 | */ | |
1da177e4 LT |
239 | unsigned int spacing; |
240 | ||
241 | /* zero if no irq; */ | |
242 | int irq; | |
243 | ||
244 | /* The timer for this si. */ | |
245 | struct timer_list si_timer; | |
246 | ||
247 | /* The time (in jiffies) the last timeout occurred at. */ | |
248 | unsigned long last_timeout_jiffies; | |
249 | ||
250 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 251 | atomic_t stop_operation; |
1da177e4 | 252 | |
c305e3d3 CM |
253 | /* |
254 | * The driver will disable interrupts when it gets into a | |
255 | * situation where it cannot handle messages due to lack of | |
256 | * memory. Once that situation clears up, it will re-enable | |
257 | * interrupts. | |
258 | */ | |
1da177e4 LT |
259 | int interrupt_disabled; |
260 | ||
50c812b2 | 261 | /* From the get device id response... */ |
3ae0e0f9 | 262 | struct ipmi_device_id device_id; |
1da177e4 | 263 | |
50c812b2 CM |
264 | /* Driver model stuff. */ |
265 | struct device *dev; | |
266 | struct platform_device *pdev; | |
267 | ||
c305e3d3 CM |
268 | /* |
269 | * True if we allocated the device, false if it came from | |
270 | * someplace else (like PCI). | |
271 | */ | |
50c812b2 CM |
272 | int dev_registered; |
273 | ||
1da177e4 LT |
274 | /* Slave address, could be reported from DMI. */ |
275 | unsigned char slave_addr; | |
276 | ||
277 | /* Counters and things for the proc filesystem. */ | |
64959e2d | 278 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 279 | |
c305e3d3 | 280 | struct task_struct *thread; |
b0defcdb CM |
281 | |
282 | struct list_head link; | |
16f4232c | 283 | union ipmi_smi_info_union addr_info; |
1da177e4 LT |
284 | }; |
285 | ||
64959e2d CM |
286 | #define smi_inc_stat(smi, stat) \ |
287 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
288 | #define smi_get_stat(smi, stat) \ | |
289 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
290 | ||
a51f4a81 CM |
291 | #define SI_MAX_PARMS 4 |
292 | ||
293 | static int force_kipmid[SI_MAX_PARMS]; | |
294 | static int num_force_kipmid; | |
56480287 MG |
295 | #ifdef CONFIG_PCI |
296 | static int pci_registered; | |
297 | #endif | |
561f8182 YL |
298 | #ifdef CONFIG_ACPI |
299 | static int pnp_registered; | |
300 | #endif | |
a51f4a81 | 301 | |
ae74e823 MW |
302 | static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; |
303 | static int num_max_busy_us; | |
304 | ||
b361e27b CM |
305 | static int unload_when_empty = 1; |
306 | ||
2407d77a | 307 | static int add_smi(struct smi_info *smi); |
b0defcdb | 308 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 309 | static void cleanup_one_si(struct smi_info *to_clean); |
d2478521 | 310 | static void cleanup_ipmi_si(void); |
b0defcdb | 311 | |
e041c683 | 312 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 313 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 314 | { |
e041c683 | 315 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
316 | } |
317 | ||
1da177e4 LT |
318 | static void deliver_recv_msg(struct smi_info *smi_info, |
319 | struct ipmi_smi_msg *msg) | |
320 | { | |
7adf579c CM |
321 | /* Deliver the message to the upper layer. */ |
322 | ipmi_smi_msg_received(smi_info->intf, msg); | |
1da177e4 LT |
323 | } |
324 | ||
4d7cbac7 | 325 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
326 | { |
327 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
328 | ||
4d7cbac7 CM |
329 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
330 | cCode = IPMI_ERR_UNSPECIFIED; | |
331 | /* else use it as is */ | |
332 | ||
25985edc | 333 | /* Make it a response */ |
1da177e4 LT |
334 | msg->rsp[0] = msg->data[0] | 4; |
335 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 336 | msg->rsp[2] = cCode; |
1da177e4 LT |
337 | msg->rsp_size = 3; |
338 | ||
339 | smi_info->curr_msg = NULL; | |
340 | deliver_recv_msg(smi_info, msg); | |
341 | } | |
342 | ||
343 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
344 | { | |
345 | int rv; | |
346 | struct list_head *entry = NULL; | |
347 | #ifdef DEBUG_TIMING | |
348 | struct timeval t; | |
349 | #endif | |
350 | ||
1da177e4 | 351 | /* Pick the high priority queue first. */ |
b0defcdb | 352 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 353 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 354 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
355 | entry = smi_info->xmit_msgs.next; |
356 | } | |
357 | ||
b0defcdb | 358 | if (!entry) { |
1da177e4 LT |
359 | smi_info->curr_msg = NULL; |
360 | rv = SI_SM_IDLE; | |
361 | } else { | |
362 | int err; | |
363 | ||
364 | list_del(entry); | |
365 | smi_info->curr_msg = list_entry(entry, | |
366 | struct ipmi_smi_msg, | |
367 | link); | |
368 | #ifdef DEBUG_TIMING | |
369 | do_gettimeofday(&t); | |
c305e3d3 | 370 | printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 | 371 | #endif |
e041c683 AS |
372 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
373 | 0, smi_info); | |
ea94027b CM |
374 | if (err & NOTIFY_STOP_MASK) { |
375 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
376 | goto out; | |
377 | } | |
1da177e4 LT |
378 | err = smi_info->handlers->start_transaction( |
379 | smi_info->si_sm, | |
380 | smi_info->curr_msg->data, | |
381 | smi_info->curr_msg->data_size); | |
c305e3d3 | 382 | if (err) |
4d7cbac7 | 383 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
384 | |
385 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
386 | } | |
c305e3d3 | 387 | out: |
1da177e4 LT |
388 | return rv; |
389 | } | |
390 | ||
391 | static void start_enable_irq(struct smi_info *smi_info) | |
392 | { | |
393 | unsigned char msg[2]; | |
394 | ||
c305e3d3 CM |
395 | /* |
396 | * If we are enabling interrupts, we have to tell the | |
397 | * BMC to use them. | |
398 | */ | |
1da177e4 LT |
399 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
400 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
401 | ||
402 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
403 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
404 | } | |
405 | ||
ee6cd5f8 CM |
406 | static void start_disable_irq(struct smi_info *smi_info) |
407 | { | |
408 | unsigned char msg[2]; | |
409 | ||
410 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
411 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
412 | ||
413 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
414 | smi_info->si_state = SI_DISABLE_INTERRUPTS1; | |
415 | } | |
416 | ||
1da177e4 LT |
417 | static void start_clear_flags(struct smi_info *smi_info) |
418 | { | |
419 | unsigned char msg[3]; | |
420 | ||
421 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
422 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
423 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
424 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
425 | ||
426 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
427 | smi_info->si_state = SI_CLEARING_FLAGS; | |
428 | } | |
429 | ||
c305e3d3 CM |
430 | /* |
431 | * When we have a situtaion where we run out of memory and cannot | |
432 | * allocate messages, we just leave them in the BMC and run the system | |
433 | * polled until we can allocate some memory. Once we have some | |
434 | * memory, we will re-enable the interrupt. | |
435 | */ | |
1da177e4 LT |
436 | static inline void disable_si_irq(struct smi_info *smi_info) |
437 | { | |
b0defcdb | 438 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
ee6cd5f8 | 439 | start_disable_irq(smi_info); |
1da177e4 | 440 | smi_info->interrupt_disabled = 1; |
ea4078ca MG |
441 | if (!atomic_read(&smi_info->stop_operation)) |
442 | mod_timer(&smi_info->si_timer, | |
443 | jiffies + SI_TIMEOUT_JIFFIES); | |
1da177e4 LT |
444 | } |
445 | } | |
446 | ||
447 | static inline void enable_si_irq(struct smi_info *smi_info) | |
448 | { | |
449 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
ee6cd5f8 | 450 | start_enable_irq(smi_info); |
1da177e4 LT |
451 | smi_info->interrupt_disabled = 0; |
452 | } | |
453 | } | |
454 | ||
455 | static void handle_flags(struct smi_info *smi_info) | |
456 | { | |
3ae0e0f9 | 457 | retry: |
1da177e4 LT |
458 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
459 | /* Watchdog pre-timeout */ | |
64959e2d | 460 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 LT |
461 | |
462 | start_clear_flags(smi_info); | |
463 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
1da177e4 | 464 | ipmi_smi_watchdog_pretimeout(smi_info->intf); |
1da177e4 LT |
465 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { |
466 | /* Messages available. */ | |
467 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 468 | if (!smi_info->curr_msg) { |
1da177e4 LT |
469 | disable_si_irq(smi_info); |
470 | smi_info->si_state = SI_NORMAL; | |
471 | return; | |
472 | } | |
473 | enable_si_irq(smi_info); | |
474 | ||
475 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
476 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
477 | smi_info->curr_msg->data_size = 2; | |
478 | ||
479 | smi_info->handlers->start_transaction( | |
480 | smi_info->si_sm, | |
481 | smi_info->curr_msg->data, | |
482 | smi_info->curr_msg->data_size); | |
483 | smi_info->si_state = SI_GETTING_MESSAGES; | |
484 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
485 | /* Events available. */ | |
486 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 487 | if (!smi_info->curr_msg) { |
1da177e4 LT |
488 | disable_si_irq(smi_info); |
489 | smi_info->si_state = SI_NORMAL; | |
490 | return; | |
491 | } | |
492 | enable_si_irq(smi_info); | |
493 | ||
494 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
495 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
496 | smi_info->curr_msg->data_size = 2; | |
497 | ||
498 | smi_info->handlers->start_transaction( | |
499 | smi_info->si_sm, | |
500 | smi_info->curr_msg->data, | |
501 | smi_info->curr_msg->data_size); | |
502 | smi_info->si_state = SI_GETTING_EVENTS; | |
4064d5ef | 503 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 504 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
505 | if (smi_info->oem_data_avail_handler(smi_info)) |
506 | goto retry; | |
c305e3d3 | 507 | } else |
1da177e4 | 508 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
509 | } |
510 | ||
511 | static void handle_transaction_done(struct smi_info *smi_info) | |
512 | { | |
513 | struct ipmi_smi_msg *msg; | |
514 | #ifdef DEBUG_TIMING | |
515 | struct timeval t; | |
516 | ||
517 | do_gettimeofday(&t); | |
c305e3d3 | 518 | printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
519 | #endif |
520 | switch (smi_info->si_state) { | |
521 | case SI_NORMAL: | |
b0defcdb | 522 | if (!smi_info->curr_msg) |
1da177e4 LT |
523 | break; |
524 | ||
525 | smi_info->curr_msg->rsp_size | |
526 | = smi_info->handlers->get_result( | |
527 | smi_info->si_sm, | |
528 | smi_info->curr_msg->rsp, | |
529 | IPMI_MAX_MSG_LENGTH); | |
530 | ||
c305e3d3 CM |
531 | /* |
532 | * Do this here becase deliver_recv_msg() releases the | |
533 | * lock, and a new message can be put in during the | |
534 | * time the lock is released. | |
535 | */ | |
1da177e4 LT |
536 | msg = smi_info->curr_msg; |
537 | smi_info->curr_msg = NULL; | |
538 | deliver_recv_msg(smi_info, msg); | |
539 | break; | |
540 | ||
541 | case SI_GETTING_FLAGS: | |
542 | { | |
543 | unsigned char msg[4]; | |
544 | unsigned int len; | |
545 | ||
546 | /* We got the flags from the SMI, now handle them. */ | |
547 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
548 | if (msg[2] != 0) { | |
c305e3d3 | 549 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
550 | smi_info->si_state = SI_NORMAL; |
551 | } else if (len < 4) { | |
c305e3d3 CM |
552 | /* |
553 | * Hmm, no flags. That's technically illegal, but | |
554 | * don't use uninitialized data. | |
555 | */ | |
1da177e4 LT |
556 | smi_info->si_state = SI_NORMAL; |
557 | } else { | |
558 | smi_info->msg_flags = msg[3]; | |
559 | handle_flags(smi_info); | |
560 | } | |
561 | break; | |
562 | } | |
563 | ||
564 | case SI_CLEARING_FLAGS: | |
565 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
566 | { | |
567 | unsigned char msg[3]; | |
568 | ||
569 | /* We cleared the flags. */ | |
570 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
571 | if (msg[2] != 0) { | |
572 | /* Error clearing flags */ | |
279fbd0c MS |
573 | dev_warn(smi_info->dev, |
574 | "Error clearing flags: %2.2x\n", msg[2]); | |
1da177e4 LT |
575 | } |
576 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
577 | start_enable_irq(smi_info); | |
578 | else | |
579 | smi_info->si_state = SI_NORMAL; | |
580 | break; | |
581 | } | |
582 | ||
583 | case SI_GETTING_EVENTS: | |
584 | { | |
585 | smi_info->curr_msg->rsp_size | |
586 | = smi_info->handlers->get_result( | |
587 | smi_info->si_sm, | |
588 | smi_info->curr_msg->rsp, | |
589 | IPMI_MAX_MSG_LENGTH); | |
590 | ||
c305e3d3 CM |
591 | /* |
592 | * Do this here becase deliver_recv_msg() releases the | |
593 | * lock, and a new message can be put in during the | |
594 | * time the lock is released. | |
595 | */ | |
1da177e4 LT |
596 | msg = smi_info->curr_msg; |
597 | smi_info->curr_msg = NULL; | |
598 | if (msg->rsp[2] != 0) { | |
599 | /* Error getting event, probably done. */ | |
600 | msg->done(msg); | |
601 | ||
602 | /* Take off the event flag. */ | |
603 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
604 | handle_flags(smi_info); | |
605 | } else { | |
64959e2d | 606 | smi_inc_stat(smi_info, events); |
1da177e4 | 607 | |
c305e3d3 CM |
608 | /* |
609 | * Do this before we deliver the message | |
610 | * because delivering the message releases the | |
611 | * lock and something else can mess with the | |
612 | * state. | |
613 | */ | |
1da177e4 LT |
614 | handle_flags(smi_info); |
615 | ||
616 | deliver_recv_msg(smi_info, msg); | |
617 | } | |
618 | break; | |
619 | } | |
620 | ||
621 | case SI_GETTING_MESSAGES: | |
622 | { | |
623 | smi_info->curr_msg->rsp_size | |
624 | = smi_info->handlers->get_result( | |
625 | smi_info->si_sm, | |
626 | smi_info->curr_msg->rsp, | |
627 | IPMI_MAX_MSG_LENGTH); | |
628 | ||
c305e3d3 CM |
629 | /* |
630 | * Do this here becase deliver_recv_msg() releases the | |
631 | * lock, and a new message can be put in during the | |
632 | * time the lock is released. | |
633 | */ | |
1da177e4 LT |
634 | msg = smi_info->curr_msg; |
635 | smi_info->curr_msg = NULL; | |
636 | if (msg->rsp[2] != 0) { | |
637 | /* Error getting event, probably done. */ | |
638 | msg->done(msg); | |
639 | ||
640 | /* Take off the msg flag. */ | |
641 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
642 | handle_flags(smi_info); | |
643 | } else { | |
64959e2d | 644 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 645 | |
c305e3d3 CM |
646 | /* |
647 | * Do this before we deliver the message | |
648 | * because delivering the message releases the | |
649 | * lock and something else can mess with the | |
650 | * state. | |
651 | */ | |
1da177e4 LT |
652 | handle_flags(smi_info); |
653 | ||
654 | deliver_recv_msg(smi_info, msg); | |
655 | } | |
656 | break; | |
657 | } | |
658 | ||
659 | case SI_ENABLE_INTERRUPTS1: | |
660 | { | |
661 | unsigned char msg[4]; | |
662 | ||
663 | /* We got the flags from the SMI, now handle them. */ | |
664 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
665 | if (msg[2] != 0) { | |
279fbd0c MS |
666 | dev_warn(smi_info->dev, "Could not enable interrupts" |
667 | ", failed get, using polled mode.\n"); | |
1da177e4 LT |
668 | smi_info->si_state = SI_NORMAL; |
669 | } else { | |
670 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
671 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
ee6cd5f8 CM |
672 | msg[2] = (msg[3] | |
673 | IPMI_BMC_RCV_MSG_INTR | | |
674 | IPMI_BMC_EVT_MSG_INTR); | |
1da177e4 LT |
675 | smi_info->handlers->start_transaction( |
676 | smi_info->si_sm, msg, 3); | |
677 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
678 | } | |
679 | break; | |
680 | } | |
681 | ||
682 | case SI_ENABLE_INTERRUPTS2: | |
683 | { | |
684 | unsigned char msg[4]; | |
685 | ||
686 | /* We got the flags from the SMI, now handle them. */ | |
687 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
279fbd0c MS |
688 | if (msg[2] != 0) |
689 | dev_warn(smi_info->dev, "Could not enable interrupts" | |
690 | ", failed set, using polled mode.\n"); | |
691 | else | |
ea4078ca | 692 | smi_info->interrupt_disabled = 0; |
1da177e4 LT |
693 | smi_info->si_state = SI_NORMAL; |
694 | break; | |
695 | } | |
ee6cd5f8 CM |
696 | |
697 | case SI_DISABLE_INTERRUPTS1: | |
698 | { | |
699 | unsigned char msg[4]; | |
700 | ||
701 | /* We got the flags from the SMI, now handle them. */ | |
702 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
703 | if (msg[2] != 0) { | |
279fbd0c MS |
704 | dev_warn(smi_info->dev, "Could not disable interrupts" |
705 | ", failed get.\n"); | |
ee6cd5f8 CM |
706 | smi_info->si_state = SI_NORMAL; |
707 | } else { | |
708 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
709 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
710 | msg[2] = (msg[3] & | |
711 | ~(IPMI_BMC_RCV_MSG_INTR | | |
712 | IPMI_BMC_EVT_MSG_INTR)); | |
713 | smi_info->handlers->start_transaction( | |
714 | smi_info->si_sm, msg, 3); | |
715 | smi_info->si_state = SI_DISABLE_INTERRUPTS2; | |
716 | } | |
717 | break; | |
718 | } | |
719 | ||
720 | case SI_DISABLE_INTERRUPTS2: | |
721 | { | |
722 | unsigned char msg[4]; | |
723 | ||
724 | /* We got the flags from the SMI, now handle them. */ | |
725 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
726 | if (msg[2] != 0) { | |
279fbd0c MS |
727 | dev_warn(smi_info->dev, "Could not disable interrupts" |
728 | ", failed set.\n"); | |
ee6cd5f8 CM |
729 | } |
730 | smi_info->si_state = SI_NORMAL; | |
731 | break; | |
732 | } | |
1da177e4 LT |
733 | } |
734 | } | |
735 | ||
c305e3d3 CM |
736 | /* |
737 | * Called on timeouts and events. Timeouts should pass the elapsed | |
738 | * time, interrupts should pass in zero. Must be called with | |
739 | * si_lock held and interrupts disabled. | |
740 | */ | |
1da177e4 LT |
741 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
742 | int time) | |
743 | { | |
744 | enum si_sm_result si_sm_result; | |
745 | ||
746 | restart: | |
c305e3d3 CM |
747 | /* |
748 | * There used to be a loop here that waited a little while | |
749 | * (around 25us) before giving up. That turned out to be | |
750 | * pointless, the minimum delays I was seeing were in the 300us | |
751 | * range, which is far too long to wait in an interrupt. So | |
752 | * we just run until the state machine tells us something | |
753 | * happened or it needs a delay. | |
754 | */ | |
1da177e4 LT |
755 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
756 | time = 0; | |
757 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 758 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 759 | |
c305e3d3 | 760 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 761 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
762 | |
763 | handle_transaction_done(smi_info); | |
764 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 765 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 766 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 767 | |
c305e3d3 CM |
768 | /* |
769 | * Do the before return_hosed_msg, because that | |
770 | * releases the lock. | |
771 | */ | |
1da177e4 LT |
772 | smi_info->si_state = SI_NORMAL; |
773 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
774 | /* |
775 | * If we were handling a user message, format | |
776 | * a response to send to the upper layer to | |
777 | * tell it about the error. | |
778 | */ | |
4d7cbac7 | 779 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
780 | } |
781 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
782 | } | |
783 | ||
4ea18425 CM |
784 | /* |
785 | * We prefer handling attn over new messages. But don't do | |
786 | * this if there is not yet an upper layer to handle anything. | |
787 | */ | |
c305e3d3 | 788 | if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) { |
1da177e4 LT |
789 | unsigned char msg[2]; |
790 | ||
64959e2d | 791 | smi_inc_stat(smi_info, attentions); |
1da177e4 | 792 | |
c305e3d3 CM |
793 | /* |
794 | * Got a attn, send down a get message flags to see | |
795 | * what's causing it. It would be better to handle | |
796 | * this in the upper layer, but due to the way | |
797 | * interrupts work with the SMI, that's not really | |
798 | * possible. | |
799 | */ | |
1da177e4 LT |
800 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
801 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
802 | ||
803 | smi_info->handlers->start_transaction( | |
804 | smi_info->si_sm, msg, 2); | |
805 | smi_info->si_state = SI_GETTING_FLAGS; | |
806 | goto restart; | |
807 | } | |
808 | ||
809 | /* If we are currently idle, try to start the next message. */ | |
810 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 811 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
812 | |
813 | si_sm_result = start_next_msg(smi_info); | |
814 | if (si_sm_result != SI_SM_IDLE) | |
815 | goto restart; | |
c305e3d3 | 816 | } |
1da177e4 LT |
817 | |
818 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
819 | && (atomic_read(&smi_info->req_events))) { |
820 | /* | |
821 | * We are idle and the upper layer requested that I fetch | |
822 | * events, so do so. | |
823 | */ | |
55162fb1 | 824 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 825 | |
55162fb1 CM |
826 | smi_info->curr_msg = ipmi_alloc_smi_msg(); |
827 | if (!smi_info->curr_msg) | |
828 | goto out; | |
1da177e4 | 829 | |
55162fb1 CM |
830 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
831 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
832 | smi_info->curr_msg->data_size = 2; | |
1da177e4 LT |
833 | |
834 | smi_info->handlers->start_transaction( | |
55162fb1 CM |
835 | smi_info->si_sm, |
836 | smi_info->curr_msg->data, | |
837 | smi_info->curr_msg->data_size); | |
838 | smi_info->si_state = SI_GETTING_EVENTS; | |
1da177e4 LT |
839 | goto restart; |
840 | } | |
55162fb1 | 841 | out: |
1da177e4 LT |
842 | return si_sm_result; |
843 | } | |
844 | ||
845 | static void sender(void *send_info, | |
846 | struct ipmi_smi_msg *msg, | |
847 | int priority) | |
848 | { | |
849 | struct smi_info *smi_info = send_info; | |
850 | enum si_sm_result result; | |
851 | unsigned long flags; | |
852 | #ifdef DEBUG_TIMING | |
853 | struct timeval t; | |
854 | #endif | |
855 | ||
b361e27b CM |
856 | if (atomic_read(&smi_info->stop_operation)) { |
857 | msg->rsp[0] = msg->data[0] | 4; | |
858 | msg->rsp[1] = msg->data[1]; | |
859 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
860 | msg->rsp_size = 3; | |
861 | deliver_recv_msg(smi_info, msg); | |
862 | return; | |
863 | } | |
864 | ||
1da177e4 LT |
865 | #ifdef DEBUG_TIMING |
866 | do_gettimeofday(&t); | |
867 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
868 | #endif | |
869 | ||
870 | if (smi_info->run_to_completion) { | |
bda4c30a CM |
871 | /* |
872 | * If we are running to completion, then throw it in | |
873 | * the list and run transactions until everything is | |
874 | * clear. Priority doesn't matter here. | |
875 | */ | |
876 | ||
877 | /* | |
878 | * Run to completion means we are single-threaded, no | |
879 | * need for locks. | |
880 | */ | |
1da177e4 LT |
881 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); |
882 | ||
1da177e4 LT |
883 | result = smi_event_handler(smi_info, 0); |
884 | while (result != SI_SM_IDLE) { | |
885 | udelay(SI_SHORT_TIMEOUT_USEC); | |
886 | result = smi_event_handler(smi_info, | |
887 | SI_SHORT_TIMEOUT_USEC); | |
888 | } | |
1da177e4 | 889 | return; |
1da177e4 | 890 | } |
1da177e4 | 891 | |
f60adf42 | 892 | spin_lock_irqsave(&smi_info->si_lock, flags); |
bda4c30a CM |
893 | if (priority > 0) |
894 | list_add_tail(&msg->link, &smi_info->hp_xmit_msgs); | |
895 | else | |
896 | list_add_tail(&msg->link, &smi_info->xmit_msgs); | |
bda4c30a | 897 | |
b88e7693 | 898 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) { |
f60adf42 CM |
899 | /* |
900 | * last_timeout_jiffies is updated here to avoid | |
901 | * smi_timeout() handler passing very large time_diff | |
902 | * value to smi_event_handler() that causes | |
903 | * the send command to abort. | |
904 | */ | |
905 | smi_info->last_timeout_jiffies = jiffies; | |
906 | ||
907 | mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
908 | ||
909 | if (smi_info->thread) | |
910 | wake_up_process(smi_info->thread); | |
911 | ||
1da177e4 | 912 | start_next_msg(smi_info); |
b88e7693 S |
913 | smi_event_handler(smi_info, 0); |
914 | } | |
bda4c30a | 915 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
916 | } |
917 | ||
918 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
919 | { | |
920 | struct smi_info *smi_info = send_info; | |
921 | enum si_sm_result result; | |
1da177e4 LT |
922 | |
923 | smi_info->run_to_completion = i_run_to_completion; | |
924 | if (i_run_to_completion) { | |
925 | result = smi_event_handler(smi_info, 0); | |
926 | while (result != SI_SM_IDLE) { | |
927 | udelay(SI_SHORT_TIMEOUT_USEC); | |
928 | result = smi_event_handler(smi_info, | |
929 | SI_SHORT_TIMEOUT_USEC); | |
930 | } | |
931 | } | |
1da177e4 LT |
932 | } |
933 | ||
ae74e823 MW |
934 | /* |
935 | * Use -1 in the nsec value of the busy waiting timespec to tell that | |
936 | * we are spinning in kipmid looking for something and not delaying | |
937 | * between checks | |
938 | */ | |
939 | static inline void ipmi_si_set_not_busy(struct timespec *ts) | |
940 | { | |
941 | ts->tv_nsec = -1; | |
942 | } | |
943 | static inline int ipmi_si_is_busy(struct timespec *ts) | |
944 | { | |
945 | return ts->tv_nsec != -1; | |
946 | } | |
947 | ||
948 | static int ipmi_thread_busy_wait(enum si_sm_result smi_result, | |
949 | const struct smi_info *smi_info, | |
950 | struct timespec *busy_until) | |
951 | { | |
952 | unsigned int max_busy_us = 0; | |
953 | ||
954 | if (smi_info->intf_num < num_max_busy_us) | |
955 | max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; | |
956 | if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) | |
957 | ipmi_si_set_not_busy(busy_until); | |
958 | else if (!ipmi_si_is_busy(busy_until)) { | |
959 | getnstimeofday(busy_until); | |
960 | timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); | |
961 | } else { | |
962 | struct timespec now; | |
963 | getnstimeofday(&now); | |
964 | if (unlikely(timespec_compare(&now, busy_until) > 0)) { | |
965 | ipmi_si_set_not_busy(busy_until); | |
966 | return 0; | |
967 | } | |
968 | } | |
969 | return 1; | |
970 | } | |
971 | ||
972 | ||
973 | /* | |
974 | * A busy-waiting loop for speeding up IPMI operation. | |
975 | * | |
976 | * Lousy hardware makes this hard. This is only enabled for systems | |
977 | * that are not BT and do not have interrupts. It starts spinning | |
978 | * when an operation is complete or until max_busy tells it to stop | |
979 | * (if that is enabled). See the paragraph on kimid_max_busy_us in | |
980 | * Documentation/IPMI.txt for details. | |
981 | */ | |
a9a2c44f CM |
982 | static int ipmi_thread(void *data) |
983 | { | |
984 | struct smi_info *smi_info = data; | |
e9a705a0 | 985 | unsigned long flags; |
a9a2c44f | 986 | enum si_sm_result smi_result; |
ae74e823 | 987 | struct timespec busy_until; |
a9a2c44f | 988 | |
ae74e823 | 989 | ipmi_si_set_not_busy(&busy_until); |
a9a2c44f | 990 | set_user_nice(current, 19); |
e9a705a0 | 991 | while (!kthread_should_stop()) { |
ae74e823 MW |
992 | int busy_wait; |
993 | ||
a9a2c44f | 994 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 995 | smi_result = smi_event_handler(smi_info, 0); |
a9a2c44f | 996 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
ae74e823 MW |
997 | busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, |
998 | &busy_until); | |
c305e3d3 CM |
999 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
1000 | ; /* do nothing */ | |
ae74e823 | 1001 | else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) |
33979734 | 1002 | schedule(); |
3326f4f2 MG |
1003 | else if (smi_result == SI_SM_IDLE) |
1004 | schedule_timeout_interruptible(100); | |
e9a705a0 | 1005 | else |
8d1f66dc | 1006 | schedule_timeout_interruptible(1); |
a9a2c44f | 1007 | } |
a9a2c44f CM |
1008 | return 0; |
1009 | } | |
1010 | ||
1011 | ||
1da177e4 LT |
1012 | static void poll(void *send_info) |
1013 | { | |
1014 | struct smi_info *smi_info = send_info; | |
f60adf42 CM |
1015 | unsigned long flags = 0; |
1016 | int run_to_completion = smi_info->run_to_completion; | |
1da177e4 | 1017 | |
15c62e10 CM |
1018 | /* |
1019 | * Make sure there is some delay in the poll loop so we can | |
1020 | * drive time forward and timeout things. | |
1021 | */ | |
1022 | udelay(10); | |
f60adf42 CM |
1023 | if (!run_to_completion) |
1024 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
15c62e10 | 1025 | smi_event_handler(smi_info, 10); |
f60adf42 CM |
1026 | if (!run_to_completion) |
1027 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1da177e4 LT |
1028 | } |
1029 | ||
1030 | static void request_events(void *send_info) | |
1031 | { | |
1032 | struct smi_info *smi_info = send_info; | |
1033 | ||
40112ae7 CM |
1034 | if (atomic_read(&smi_info->stop_operation) || |
1035 | !smi_info->has_event_buffer) | |
b361e27b CM |
1036 | return; |
1037 | ||
1da177e4 LT |
1038 | atomic_set(&smi_info->req_events, 1); |
1039 | } | |
1040 | ||
0c8204b3 | 1041 | static int initialized; |
1da177e4 | 1042 | |
1da177e4 LT |
1043 | static void smi_timeout(unsigned long data) |
1044 | { | |
1045 | struct smi_info *smi_info = (struct smi_info *) data; | |
1046 | enum si_sm_result smi_result; | |
1047 | unsigned long flags; | |
1048 | unsigned long jiffies_now; | |
c4edff1c | 1049 | long time_diff; |
3326f4f2 | 1050 | long timeout; |
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 | 1070 | /* Running with interrupts, only do long timeouts. */ |
3326f4f2 | 1071 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
64959e2d | 1072 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1073 | goto do_mod_timer; |
1da177e4 LT |
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); |
3326f4f2 | 1082 | timeout = jiffies + 1; |
1da177e4 | 1083 | } else { |
64959e2d | 1084 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1085 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1086 | } |
1087 | ||
3326f4f2 MG |
1088 | do_mod_timer: |
1089 | if (smi_result != SI_SM_IDLE) | |
1090 | mod_timer(&(smi_info->si_timer), timeout); | |
1da177e4 LT |
1091 | } |
1092 | ||
7d12e780 | 1093 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
1094 | { |
1095 | struct smi_info *smi_info = data; | |
1096 | unsigned long flags; | |
1097 | #ifdef DEBUG_TIMING | |
1098 | struct timeval t; | |
1099 | #endif | |
1100 | ||
1101 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1102 | ||
64959e2d | 1103 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1104 | |
1da177e4 LT |
1105 | #ifdef DEBUG_TIMING |
1106 | do_gettimeofday(&t); | |
c305e3d3 | 1107 | printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1108 | #endif |
1109 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1110 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1111 | return IRQ_HANDLED; | |
1112 | } | |
1113 | ||
7d12e780 | 1114 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
1115 | { |
1116 | struct smi_info *smi_info = data; | |
1117 | /* We need to clear the IRQ flag for the BT interface. */ | |
1118 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1119 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1120 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 1121 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
1122 | } |
1123 | ||
453823ba CM |
1124 | static int smi_start_processing(void *send_info, |
1125 | ipmi_smi_t intf) | |
1126 | { | |
1127 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1128 | int enable = 0; |
453823ba CM |
1129 | |
1130 | new_smi->intf = intf; | |
1131 | ||
c45adc39 CM |
1132 | /* Try to claim any interrupts. */ |
1133 | if (new_smi->irq_setup) | |
1134 | new_smi->irq_setup(new_smi); | |
1135 | ||
453823ba CM |
1136 | /* Set up the timer that drives the interface. */ |
1137 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
1138 | new_smi->last_timeout_jiffies = jiffies; | |
1139 | mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
1140 | ||
a51f4a81 CM |
1141 | /* |
1142 | * Check if the user forcefully enabled the daemon. | |
1143 | */ | |
1144 | if (new_smi->intf_num < num_force_kipmid) | |
1145 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1146 | /* |
1147 | * The BT interface is efficient enough to not need a thread, | |
1148 | * and there is no need for a thread if we have interrupts. | |
1149 | */ | |
c305e3d3 | 1150 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
a51f4a81 CM |
1151 | enable = 1; |
1152 | ||
1153 | if (enable) { | |
453823ba CM |
1154 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1155 | "kipmi%d", new_smi->intf_num); | |
1156 | if (IS_ERR(new_smi->thread)) { | |
279fbd0c MS |
1157 | dev_notice(new_smi->dev, "Could not start" |
1158 | " kernel thread due to error %ld, only using" | |
1159 | " timers to drive the interface\n", | |
1160 | PTR_ERR(new_smi->thread)); | |
453823ba CM |
1161 | new_smi->thread = NULL; |
1162 | } | |
1163 | } | |
1164 | ||
1165 | return 0; | |
1166 | } | |
9dbf68f9 | 1167 | |
16f4232c ZY |
1168 | static int get_smi_info(void *send_info, struct ipmi_smi_info *data) |
1169 | { | |
1170 | struct smi_info *smi = send_info; | |
1171 | ||
1172 | data->addr_src = smi->addr_source; | |
1173 | data->dev = smi->dev; | |
1174 | data->addr_info = smi->addr_info; | |
1175 | get_device(smi->dev); | |
1176 | ||
1177 | return 0; | |
1178 | } | |
1179 | ||
b9675136 CM |
1180 | static void set_maintenance_mode(void *send_info, int enable) |
1181 | { | |
1182 | struct smi_info *smi_info = send_info; | |
1183 | ||
1184 | if (!enable) | |
1185 | atomic_set(&smi_info->req_events, 0); | |
1186 | } | |
1187 | ||
c305e3d3 | 1188 | static struct ipmi_smi_handlers handlers = { |
1da177e4 | 1189 | .owner = THIS_MODULE, |
453823ba | 1190 | .start_processing = smi_start_processing, |
16f4232c | 1191 | .get_smi_info = get_smi_info, |
1da177e4 LT |
1192 | .sender = sender, |
1193 | .request_events = request_events, | |
b9675136 | 1194 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
1195 | .set_run_to_completion = set_run_to_completion, |
1196 | .poll = poll, | |
1197 | }; | |
1198 | ||
c305e3d3 CM |
1199 | /* |
1200 | * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1201 | * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. | |
1202 | */ | |
1da177e4 | 1203 | |
b0defcdb | 1204 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1205 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1206 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1207 | |
1da177e4 | 1208 | #define DEFAULT_REGSPACING 1 |
dba9b4f6 | 1209 | #define DEFAULT_REGSIZE 1 |
1da177e4 | 1210 | |
d941aeae CM |
1211 | #ifdef CONFIG_ACPI |
1212 | static bool si_tryacpi = 1; | |
1213 | #endif | |
1214 | #ifdef CONFIG_DMI | |
1215 | static bool si_trydmi = 1; | |
1216 | #endif | |
f2afae46 CM |
1217 | static bool si_tryplatform = 1; |
1218 | #ifdef CONFIG_PCI | |
1219 | static bool si_trypci = 1; | |
1220 | #endif | |
90ab5ee9 | 1221 | static bool si_trydefaults = 1; |
1da177e4 LT |
1222 | static char *si_type[SI_MAX_PARMS]; |
1223 | #define MAX_SI_TYPE_STR 30 | |
1224 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1225 | static unsigned long addrs[SI_MAX_PARMS]; | |
64a6f950 | 1226 | static unsigned int num_addrs; |
1da177e4 | 1227 | static unsigned int ports[SI_MAX_PARMS]; |
64a6f950 | 1228 | static unsigned int num_ports; |
1da177e4 | 1229 | static int irqs[SI_MAX_PARMS]; |
64a6f950 | 1230 | static unsigned int num_irqs; |
1da177e4 | 1231 | static int regspacings[SI_MAX_PARMS]; |
64a6f950 | 1232 | static unsigned int num_regspacings; |
1da177e4 | 1233 | static int regsizes[SI_MAX_PARMS]; |
64a6f950 | 1234 | static unsigned int num_regsizes; |
1da177e4 | 1235 | static int regshifts[SI_MAX_PARMS]; |
64a6f950 | 1236 | static unsigned int num_regshifts; |
2f95d513 | 1237 | static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ |
64a6f950 | 1238 | static unsigned int num_slave_addrs; |
1da177e4 | 1239 | |
b361e27b CM |
1240 | #define IPMI_IO_ADDR_SPACE 0 |
1241 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1242 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1243 | |
1244 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1245 | ||
1246 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1247 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1248 | " Documentation/IPMI.txt in the kernel sources for the" | |
1249 | " gory details."); | |
1da177e4 | 1250 | |
d941aeae CM |
1251 | #ifdef CONFIG_ACPI |
1252 | module_param_named(tryacpi, si_tryacpi, bool, 0); | |
1253 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1254 | " default scan of the interfaces identified via ACPI"); | |
1255 | #endif | |
1256 | #ifdef CONFIG_DMI | |
1257 | module_param_named(trydmi, si_trydmi, bool, 0); | |
1258 | MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the" | |
1259 | " default scan of the interfaces identified via DMI"); | |
1260 | #endif | |
f2afae46 CM |
1261 | module_param_named(tryplatform, si_tryplatform, bool, 0); |
1262 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1263 | " default scan of the interfaces identified via platform" | |
1264 | " interfaces like openfirmware"); | |
1265 | #ifdef CONFIG_PCI | |
1266 | module_param_named(trypci, si_trypci, bool, 0); | |
1267 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1268 | " default scan of the interfaces identified via pci"); | |
1269 | #endif | |
1da177e4 LT |
1270 | module_param_named(trydefaults, si_trydefaults, bool, 0); |
1271 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1272 | " default scan of the KCS and SMIC interface at the standard" | |
1273 | " address"); | |
1274 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1275 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1276 | " interface separated by commas. The types are 'kcs'," | |
1277 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1278 | " the first interface to kcs and the second to bt"); | |
64a6f950 | 1279 | module_param_array(addrs, ulong, &num_addrs, 0); |
1da177e4 LT |
1280 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" |
1281 | " addresses separated by commas. Only use if an interface" | |
1282 | " is in memory. Otherwise, set it to zero or leave" | |
1283 | " it blank."); | |
64a6f950 | 1284 | module_param_array(ports, uint, &num_ports, 0); |
1da177e4 LT |
1285 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" |
1286 | " addresses separated by commas. Only use if an interface" | |
1287 | " is a port. Otherwise, set it to zero or leave" | |
1288 | " it blank."); | |
1289 | module_param_array(irqs, int, &num_irqs, 0); | |
1290 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1291 | " addresses separated by commas. Only use if an interface" | |
1292 | " has an interrupt. Otherwise, set it to zero or leave" | |
1293 | " it blank."); | |
1294 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1295 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1296 | " and each successive register used by the interface. For" | |
1297 | " instance, if the start address is 0xca2 and the spacing" | |
1298 | " is 2, then the second address is at 0xca4. Defaults" | |
1299 | " to 1."); | |
1300 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1301 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1302 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1303 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1304 | " the 8-bit IPMI register has to be read from a larger" | |
1305 | " register."); | |
1306 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1307 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1308 | " IPMI register, in bits. For instance, if the data" | |
1309 | " is read from a 32-bit word and the IPMI data is in" | |
1310 | " bit 8-15, then the shift would be 8"); | |
1311 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1312 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1313 | " the controller. Normally this is 0x20, but can be" | |
1314 | " overridden by this parm. This is an array indexed" | |
1315 | " by interface number."); | |
a51f4a81 CM |
1316 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1317 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1318 | " disabled(0). Normally the IPMI driver auto-detects" | |
1319 | " this, but the value may be overridden by this parm."); | |
b361e27b CM |
1320 | module_param(unload_when_empty, int, 0); |
1321 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" | |
1322 | " specified or found, default is 1. Setting to 0" | |
1323 | " is useful for hot add of devices using hotmod."); | |
ae74e823 MW |
1324 | module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); |
1325 | MODULE_PARM_DESC(kipmid_max_busy_us, | |
1326 | "Max time (in microseconds) to busy-wait for IPMI data before" | |
1327 | " sleeping. 0 (default) means to wait forever. Set to 100-500" | |
1328 | " if kipmid is using up a lot of CPU time."); | |
1da177e4 LT |
1329 | |
1330 | ||
b0defcdb | 1331 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1332 | { |
b0defcdb CM |
1333 | if (info->si_type == SI_BT) |
1334 | /* Disable the interrupt in the BT interface. */ | |
1335 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1336 | free_irq(info->irq, info); | |
1da177e4 | 1337 | } |
1da177e4 LT |
1338 | |
1339 | static int std_irq_setup(struct smi_info *info) | |
1340 | { | |
1341 | int rv; | |
1342 | ||
b0defcdb | 1343 | if (!info->irq) |
1da177e4 LT |
1344 | return 0; |
1345 | ||
9dbf68f9 CM |
1346 | if (info->si_type == SI_BT) { |
1347 | rv = request_irq(info->irq, | |
1348 | si_bt_irq_handler, | |
ee6cd5f8 | 1349 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1350 | DEVICE_NAME, |
1351 | info); | |
b0defcdb | 1352 | if (!rv) |
9dbf68f9 CM |
1353 | /* Enable the interrupt in the BT interface. */ |
1354 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1355 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1356 | } else | |
1357 | rv = request_irq(info->irq, | |
1358 | si_irq_handler, | |
ee6cd5f8 | 1359 | IRQF_SHARED | IRQF_DISABLED, |
9dbf68f9 CM |
1360 | DEVICE_NAME, |
1361 | info); | |
1da177e4 | 1362 | if (rv) { |
279fbd0c MS |
1363 | dev_warn(info->dev, "%s unable to claim interrupt %d," |
1364 | " running polled\n", | |
1365 | DEVICE_NAME, info->irq); | |
1da177e4 LT |
1366 | info->irq = 0; |
1367 | } else { | |
b0defcdb | 1368 | info->irq_cleanup = std_irq_cleanup; |
279fbd0c | 1369 | dev_info(info->dev, "Using irq %d\n", info->irq); |
1da177e4 LT |
1370 | } |
1371 | ||
1372 | return rv; | |
1373 | } | |
1374 | ||
1da177e4 LT |
1375 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1376 | { | |
b0defcdb | 1377 | unsigned int addr = io->addr_data; |
1da177e4 | 1378 | |
b0defcdb | 1379 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1380 | } |
1381 | ||
1382 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1383 | unsigned char b) | |
1384 | { | |
b0defcdb | 1385 | unsigned int addr = io->addr_data; |
1da177e4 | 1386 | |
b0defcdb | 1387 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1388 | } |
1389 | ||
1390 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1391 | { | |
b0defcdb | 1392 | unsigned int addr = io->addr_data; |
1da177e4 | 1393 | |
b0defcdb | 1394 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1395 | } |
1396 | ||
1397 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1398 | unsigned char b) | |
1399 | { | |
b0defcdb | 1400 | unsigned int addr = io->addr_data; |
1da177e4 | 1401 | |
b0defcdb | 1402 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1403 | } |
1404 | ||
1405 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1406 | { | |
b0defcdb | 1407 | unsigned int addr = io->addr_data; |
1da177e4 | 1408 | |
b0defcdb | 1409 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1410 | } |
1411 | ||
1412 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1413 | unsigned char b) | |
1414 | { | |
b0defcdb | 1415 | unsigned int addr = io->addr_data; |
1da177e4 | 1416 | |
b0defcdb | 1417 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1418 | } |
1419 | ||
1420 | static void port_cleanup(struct smi_info *info) | |
1421 | { | |
b0defcdb | 1422 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1423 | int idx; |
1da177e4 | 1424 | |
b0defcdb | 1425 | if (addr) { |
c305e3d3 | 1426 | for (idx = 0; idx < info->io_size; idx++) |
d61a3ead CM |
1427 | release_region(addr + idx * info->io.regspacing, |
1428 | info->io.regsize); | |
1da177e4 | 1429 | } |
1da177e4 LT |
1430 | } |
1431 | ||
1432 | static int port_setup(struct smi_info *info) | |
1433 | { | |
b0defcdb | 1434 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1435 | int idx; |
1da177e4 | 1436 | |
b0defcdb | 1437 | if (!addr) |
1da177e4 LT |
1438 | return -ENODEV; |
1439 | ||
1440 | info->io_cleanup = port_cleanup; | |
1441 | ||
c305e3d3 CM |
1442 | /* |
1443 | * Figure out the actual inb/inw/inl/etc routine to use based | |
1444 | * upon the register size. | |
1445 | */ | |
1da177e4 LT |
1446 | switch (info->io.regsize) { |
1447 | case 1: | |
1448 | info->io.inputb = port_inb; | |
1449 | info->io.outputb = port_outb; | |
1450 | break; | |
1451 | case 2: | |
1452 | info->io.inputb = port_inw; | |
1453 | info->io.outputb = port_outw; | |
1454 | break; | |
1455 | case 4: | |
1456 | info->io.inputb = port_inl; | |
1457 | info->io.outputb = port_outl; | |
1458 | break; | |
1459 | default: | |
279fbd0c MS |
1460 | dev_warn(info->dev, "Invalid register size: %d\n", |
1461 | info->io.regsize); | |
1da177e4 LT |
1462 | return -EINVAL; |
1463 | } | |
1464 | ||
c305e3d3 CM |
1465 | /* |
1466 | * Some BIOSes reserve disjoint I/O regions in their ACPI | |
d61a3ead CM |
1467 | * tables. This causes problems when trying to register the |
1468 | * entire I/O region. Therefore we must register each I/O | |
1469 | * port separately. | |
1470 | */ | |
c305e3d3 | 1471 | for (idx = 0; idx < info->io_size; idx++) { |
d61a3ead CM |
1472 | if (request_region(addr + idx * info->io.regspacing, |
1473 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1474 | /* Undo allocations */ | |
1475 | while (idx--) { | |
1476 | release_region(addr + idx * info->io.regspacing, | |
1477 | info->io.regsize); | |
1478 | } | |
1479 | return -EIO; | |
1480 | } | |
1481 | } | |
1da177e4 LT |
1482 | return 0; |
1483 | } | |
1484 | ||
546cfdf4 | 1485 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1486 | { |
1487 | return readb((io->addr)+(offset * io->regspacing)); | |
1488 | } | |
1489 | ||
546cfdf4 | 1490 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1491 | unsigned char b) |
1492 | { | |
1493 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1494 | } | |
1495 | ||
546cfdf4 | 1496 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1497 | { |
1498 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1499 | & 0xff; |
1da177e4 LT |
1500 | } |
1501 | ||
546cfdf4 | 1502 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1503 | unsigned char b) |
1504 | { | |
1505 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1506 | } | |
1507 | ||
546cfdf4 | 1508 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1509 | { |
1510 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1511 | & 0xff; |
1da177e4 LT |
1512 | } |
1513 | ||
546cfdf4 | 1514 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1515 | unsigned char b) |
1516 | { | |
1517 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1518 | } | |
1519 | ||
1520 | #ifdef readq | |
1521 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1522 | { | |
1523 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1524 | & 0xff; |
1da177e4 LT |
1525 | } |
1526 | ||
1527 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1528 | unsigned char b) | |
1529 | { | |
1530 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1531 | } | |
1532 | #endif | |
1533 | ||
1534 | static void mem_cleanup(struct smi_info *info) | |
1535 | { | |
b0defcdb | 1536 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1537 | int mapsize; |
1538 | ||
1539 | if (info->io.addr) { | |
1540 | iounmap(info->io.addr); | |
1541 | ||
1542 | mapsize = ((info->io_size * info->io.regspacing) | |
1543 | - (info->io.regspacing - info->io.regsize)); | |
1544 | ||
b0defcdb | 1545 | release_mem_region(addr, mapsize); |
1da177e4 | 1546 | } |
1da177e4 LT |
1547 | } |
1548 | ||
1549 | static int mem_setup(struct smi_info *info) | |
1550 | { | |
b0defcdb | 1551 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1552 | int mapsize; |
1553 | ||
b0defcdb | 1554 | if (!addr) |
1da177e4 LT |
1555 | return -ENODEV; |
1556 | ||
1557 | info->io_cleanup = mem_cleanup; | |
1558 | ||
c305e3d3 CM |
1559 | /* |
1560 | * Figure out the actual readb/readw/readl/etc routine to use based | |
1561 | * upon the register size. | |
1562 | */ | |
1da177e4 LT |
1563 | switch (info->io.regsize) { |
1564 | case 1: | |
546cfdf4 AD |
1565 | info->io.inputb = intf_mem_inb; |
1566 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1567 | break; |
1568 | case 2: | |
546cfdf4 AD |
1569 | info->io.inputb = intf_mem_inw; |
1570 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1571 | break; |
1572 | case 4: | |
546cfdf4 AD |
1573 | info->io.inputb = intf_mem_inl; |
1574 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1575 | break; |
1576 | #ifdef readq | |
1577 | case 8: | |
1578 | info->io.inputb = mem_inq; | |
1579 | info->io.outputb = mem_outq; | |
1580 | break; | |
1581 | #endif | |
1582 | default: | |
279fbd0c MS |
1583 | dev_warn(info->dev, "Invalid register size: %d\n", |
1584 | info->io.regsize); | |
1da177e4 LT |
1585 | return -EINVAL; |
1586 | } | |
1587 | ||
c305e3d3 CM |
1588 | /* |
1589 | * Calculate the total amount of memory to claim. This is an | |
1da177e4 LT |
1590 | * unusual looking calculation, but it avoids claiming any |
1591 | * more memory than it has to. It will claim everything | |
1592 | * between the first address to the end of the last full | |
c305e3d3 CM |
1593 | * register. |
1594 | */ | |
1da177e4 LT |
1595 | mapsize = ((info->io_size * info->io.regspacing) |
1596 | - (info->io.regspacing - info->io.regsize)); | |
1597 | ||
b0defcdb | 1598 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1599 | return -EIO; |
1600 | ||
b0defcdb | 1601 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1602 | if (info->io.addr == NULL) { |
b0defcdb | 1603 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1604 | return -EIO; |
1605 | } | |
1606 | return 0; | |
1607 | } | |
1608 | ||
b361e27b CM |
1609 | /* |
1610 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1611 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1612 | * Options are: | |
1613 | * rsp=<regspacing> | |
1614 | * rsi=<regsize> | |
1615 | * rsh=<regshift> | |
1616 | * irq=<irq> | |
1617 | * ipmb=<ipmb addr> | |
1618 | */ | |
1619 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1620 | struct hotmod_vals { | |
1621 | char *name; | |
1622 | int val; | |
1623 | }; | |
1624 | static struct hotmod_vals hotmod_ops[] = { | |
1625 | { "add", HM_ADD }, | |
1626 | { "remove", HM_REMOVE }, | |
1627 | { NULL } | |
1628 | }; | |
1629 | static struct hotmod_vals hotmod_si[] = { | |
1630 | { "kcs", SI_KCS }, | |
1631 | { "smic", SI_SMIC }, | |
1632 | { "bt", SI_BT }, | |
1633 | { NULL } | |
1634 | }; | |
1635 | static struct hotmod_vals hotmod_as[] = { | |
1636 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1637 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1638 | { NULL } | |
1639 | }; | |
1d5636cc | 1640 | |
b361e27b CM |
1641 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1642 | { | |
1643 | char *s; | |
1644 | int i; | |
1645 | ||
1646 | s = strchr(*curr, ','); | |
1647 | if (!s) { | |
1648 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1649 | return -EINVAL; | |
1650 | } | |
1651 | *s = '\0'; | |
1652 | s++; | |
1653 | for (i = 0; hotmod_ops[i].name; i++) { | |
1d5636cc | 1654 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1655 | *val = v[i].val; |
1656 | *curr = s; | |
1657 | return 0; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1662 | return -EINVAL; | |
1663 | } | |
1664 | ||
1d5636cc CM |
1665 | static int check_hotmod_int_op(const char *curr, const char *option, |
1666 | const char *name, int *val) | |
1667 | { | |
1668 | char *n; | |
1669 | ||
1670 | if (strcmp(curr, name) == 0) { | |
1671 | if (!option) { | |
1672 | printk(KERN_WARNING PFX | |
1673 | "No option given for '%s'\n", | |
1674 | curr); | |
1675 | return -EINVAL; | |
1676 | } | |
1677 | *val = simple_strtoul(option, &n, 0); | |
1678 | if ((*n != '\0') || (*option == '\0')) { | |
1679 | printk(KERN_WARNING PFX | |
1680 | "Bad option given for '%s'\n", | |
1681 | curr); | |
1682 | return -EINVAL; | |
1683 | } | |
1684 | return 1; | |
1685 | } | |
1686 | return 0; | |
1687 | } | |
1688 | ||
de5e2ddf ED |
1689 | static struct smi_info *smi_info_alloc(void) |
1690 | { | |
1691 | struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1692 | ||
f60adf42 | 1693 | if (info) |
de5e2ddf | 1694 | spin_lock_init(&info->si_lock); |
de5e2ddf ED |
1695 | return info; |
1696 | } | |
1697 | ||
b361e27b CM |
1698 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1699 | { | |
1700 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1701 | int rv; |
b361e27b CM |
1702 | char *next, *curr, *s, *n, *o; |
1703 | enum hotmod_op op; | |
1704 | enum si_type si_type; | |
1705 | int addr_space; | |
1706 | unsigned long addr; | |
1707 | int regspacing; | |
1708 | int regsize; | |
1709 | int regshift; | |
1710 | int irq; | |
1711 | int ipmb; | |
1712 | int ival; | |
1d5636cc | 1713 | int len; |
b361e27b CM |
1714 | struct smi_info *info; |
1715 | ||
1716 | if (!str) | |
1717 | return -ENOMEM; | |
1718 | ||
1719 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1720 | len = strlen(str); |
1721 | ival = len - 1; | |
b361e27b CM |
1722 | while ((ival >= 0) && isspace(str[ival])) { |
1723 | str[ival] = '\0'; | |
1724 | ival--; | |
1725 | } | |
1726 | ||
1727 | for (curr = str; curr; curr = next) { | |
1728 | regspacing = 1; | |
1729 | regsize = 1; | |
1730 | regshift = 0; | |
1731 | irq = 0; | |
2f95d513 | 1732 | ipmb = 0; /* Choose the default if not specified */ |
b361e27b CM |
1733 | |
1734 | next = strchr(curr, ':'); | |
1735 | if (next) { | |
1736 | *next = '\0'; | |
1737 | next++; | |
1738 | } | |
1739 | ||
1740 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1741 | if (rv) | |
1742 | break; | |
1743 | op = ival; | |
1744 | ||
1745 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1746 | if (rv) | |
1747 | break; | |
1748 | si_type = ival; | |
1749 | ||
1750 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1751 | if (rv) | |
1752 | break; | |
1753 | ||
1754 | s = strchr(curr, ','); | |
1755 | if (s) { | |
1756 | *s = '\0'; | |
1757 | s++; | |
1758 | } | |
1759 | addr = simple_strtoul(curr, &n, 0); | |
1760 | if ((*n != '\0') || (*curr == '\0')) { | |
1761 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1762 | " '%s'\n", curr); | |
1763 | break; | |
1764 | } | |
1765 | ||
1766 | while (s) { | |
1767 | curr = s; | |
1768 | s = strchr(curr, ','); | |
1769 | if (s) { | |
1770 | *s = '\0'; | |
1771 | s++; | |
1772 | } | |
1773 | o = strchr(curr, '='); | |
1774 | if (o) { | |
1775 | *o = '\0'; | |
1776 | o++; | |
1777 | } | |
1d5636cc CM |
1778 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1779 | if (rv < 0) | |
b361e27b | 1780 | goto out; |
1d5636cc CM |
1781 | else if (rv) |
1782 | continue; | |
1783 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1784 | if (rv < 0) | |
1785 | goto out; | |
1786 | else if (rv) | |
1787 | continue; | |
1788 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1789 | if (rv < 0) | |
1790 | goto out; | |
1791 | else if (rv) | |
1792 | continue; | |
1793 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1794 | if (rv < 0) | |
1795 | goto out; | |
1796 | else if (rv) | |
1797 | continue; | |
1798 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1799 | if (rv < 0) | |
1800 | goto out; | |
1801 | else if (rv) | |
1802 | continue; | |
1803 | ||
1804 | rv = -EINVAL; | |
1805 | printk(KERN_WARNING PFX | |
1806 | "Invalid hotmod option '%s'\n", | |
1807 | curr); | |
1808 | goto out; | |
b361e27b CM |
1809 | } |
1810 | ||
1811 | if (op == HM_ADD) { | |
de5e2ddf | 1812 | info = smi_info_alloc(); |
b361e27b CM |
1813 | if (!info) { |
1814 | rv = -ENOMEM; | |
1815 | goto out; | |
1816 | } | |
1817 | ||
5fedc4a2 | 1818 | info->addr_source = SI_HOTMOD; |
b361e27b CM |
1819 | info->si_type = si_type; |
1820 | info->io.addr_data = addr; | |
1821 | info->io.addr_type = addr_space; | |
1822 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1823 | info->io_setup = mem_setup; | |
1824 | else | |
1825 | info->io_setup = port_setup; | |
1826 | ||
1827 | info->io.addr = NULL; | |
1828 | info->io.regspacing = regspacing; | |
1829 | if (!info->io.regspacing) | |
1830 | info->io.regspacing = DEFAULT_REGSPACING; | |
1831 | info->io.regsize = regsize; | |
1832 | if (!info->io.regsize) | |
1833 | info->io.regsize = DEFAULT_REGSPACING; | |
1834 | info->io.regshift = regshift; | |
1835 | info->irq = irq; | |
1836 | if (info->irq) | |
1837 | info->irq_setup = std_irq_setup; | |
1838 | info->slave_addr = ipmb; | |
1839 | ||
7faefea6 | 1840 | if (!add_smi(info)) { |
2407d77a MG |
1841 | if (try_smi_init(info)) |
1842 | cleanup_one_si(info); | |
7faefea6 YL |
1843 | } else { |
1844 | kfree(info); | |
1845 | } | |
b361e27b CM |
1846 | } else { |
1847 | /* remove */ | |
1848 | struct smi_info *e, *tmp_e; | |
1849 | ||
1850 | mutex_lock(&smi_infos_lock); | |
1851 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1852 | if (e->io.addr_type != addr_space) | |
1853 | continue; | |
1854 | if (e->si_type != si_type) | |
1855 | continue; | |
1856 | if (e->io.addr_data == addr) | |
1857 | cleanup_one_si(e); | |
1858 | } | |
1859 | mutex_unlock(&smi_infos_lock); | |
1860 | } | |
1861 | } | |
1d5636cc | 1862 | rv = len; |
b361e27b CM |
1863 | out: |
1864 | kfree(str); | |
1865 | return rv; | |
1866 | } | |
b0defcdb | 1867 | |
2223cbec | 1868 | static int hardcode_find_bmc(void) |
1da177e4 | 1869 | { |
a1e9c9dd | 1870 | int ret = -ENODEV; |
b0defcdb | 1871 | int i; |
1da177e4 LT |
1872 | struct smi_info *info; |
1873 | ||
b0defcdb CM |
1874 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1875 | if (!ports[i] && !addrs[i]) | |
1876 | continue; | |
1da177e4 | 1877 | |
de5e2ddf | 1878 | info = smi_info_alloc(); |
b0defcdb | 1879 | if (!info) |
a1e9c9dd | 1880 | return -ENOMEM; |
1da177e4 | 1881 | |
5fedc4a2 | 1882 | info->addr_source = SI_HARDCODED; |
279fbd0c | 1883 | printk(KERN_INFO PFX "probing via hardcoded address\n"); |
1da177e4 | 1884 | |
1d5636cc | 1885 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1886 | info->si_type = SI_KCS; |
1d5636cc | 1887 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1888 | info->si_type = SI_SMIC; |
1d5636cc | 1889 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1890 | info->si_type = SI_BT; |
1891 | } else { | |
279fbd0c | 1892 | printk(KERN_WARNING PFX "Interface type specified " |
b0defcdb CM |
1893 | "for interface %d, was invalid: %s\n", |
1894 | i, si_type[i]); | |
1895 | kfree(info); | |
1896 | continue; | |
1897 | } | |
1da177e4 | 1898 | |
b0defcdb CM |
1899 | if (ports[i]) { |
1900 | /* An I/O port */ | |
1901 | info->io_setup = port_setup; | |
1902 | info->io.addr_data = ports[i]; | |
1903 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1904 | } else if (addrs[i]) { | |
1905 | /* A memory port */ | |
1906 | info->io_setup = mem_setup; | |
1907 | info->io.addr_data = addrs[i]; | |
1908 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1909 | } else { | |
279fbd0c MS |
1910 | printk(KERN_WARNING PFX "Interface type specified " |
1911 | "for interface %d, but port and address were " | |
1912 | "not set or set to zero.\n", i); | |
b0defcdb CM |
1913 | kfree(info); |
1914 | continue; | |
1915 | } | |
1da177e4 | 1916 | |
b0defcdb CM |
1917 | info->io.addr = NULL; |
1918 | info->io.regspacing = regspacings[i]; | |
1919 | if (!info->io.regspacing) | |
1920 | info->io.regspacing = DEFAULT_REGSPACING; | |
1921 | info->io.regsize = regsizes[i]; | |
1922 | if (!info->io.regsize) | |
1923 | info->io.regsize = DEFAULT_REGSPACING; | |
1924 | info->io.regshift = regshifts[i]; | |
1925 | info->irq = irqs[i]; | |
1926 | if (info->irq) | |
1927 | info->irq_setup = std_irq_setup; | |
2f95d513 | 1928 | info->slave_addr = slave_addrs[i]; |
1da177e4 | 1929 | |
7faefea6 | 1930 | if (!add_smi(info)) { |
2407d77a MG |
1931 | if (try_smi_init(info)) |
1932 | cleanup_one_si(info); | |
a1e9c9dd | 1933 | ret = 0; |
7faefea6 YL |
1934 | } else { |
1935 | kfree(info); | |
1936 | } | |
b0defcdb | 1937 | } |
a1e9c9dd | 1938 | return ret; |
b0defcdb | 1939 | } |
1da177e4 | 1940 | |
8466361a | 1941 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1942 | |
1943 | #include <linux/acpi.h> | |
1944 | ||
c305e3d3 CM |
1945 | /* |
1946 | * Once we get an ACPI failure, we don't try any more, because we go | |
1947 | * through the tables sequentially. Once we don't find a table, there | |
1948 | * are no more. | |
1949 | */ | |
0c8204b3 | 1950 | static int acpi_failure; |
1da177e4 LT |
1951 | |
1952 | /* For GPE-type interrupts. */ | |
8b6cd8ad LM |
1953 | static u32 ipmi_acpi_gpe(acpi_handle gpe_device, |
1954 | u32 gpe_number, void *context) | |
1da177e4 LT |
1955 | { |
1956 | struct smi_info *smi_info = context; | |
1957 | unsigned long flags; | |
1958 | #ifdef DEBUG_TIMING | |
1959 | struct timeval t; | |
1960 | #endif | |
1961 | ||
1962 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1963 | ||
64959e2d | 1964 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1965 | |
1da177e4 LT |
1966 | #ifdef DEBUG_TIMING |
1967 | do_gettimeofday(&t); | |
1968 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1969 | #endif | |
1970 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1971 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1972 | ||
1973 | return ACPI_INTERRUPT_HANDLED; | |
1974 | } | |
1975 | ||
b0defcdb CM |
1976 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
1977 | { | |
1978 | if (!info->irq) | |
1979 | return; | |
1980 | ||
1981 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1982 | } | |
1983 | ||
1da177e4 LT |
1984 | static int acpi_gpe_irq_setup(struct smi_info *info) |
1985 | { | |
1986 | acpi_status status; | |
1987 | ||
b0defcdb | 1988 | if (!info->irq) |
1da177e4 LT |
1989 | return 0; |
1990 | ||
1991 | /* FIXME - is level triggered right? */ | |
1992 | status = acpi_install_gpe_handler(NULL, | |
1993 | info->irq, | |
1994 | ACPI_GPE_LEVEL_TRIGGERED, | |
1995 | &ipmi_acpi_gpe, | |
1996 | info); | |
1997 | if (status != AE_OK) { | |
279fbd0c MS |
1998 | dev_warn(info->dev, "%s unable to claim ACPI GPE %d," |
1999 | " running polled\n", DEVICE_NAME, info->irq); | |
1da177e4 LT |
2000 | info->irq = 0; |
2001 | return -EINVAL; | |
2002 | } else { | |
b0defcdb | 2003 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
279fbd0c | 2004 | dev_info(info->dev, "Using ACPI GPE %d\n", info->irq); |
1da177e4 LT |
2005 | return 0; |
2006 | } | |
2007 | } | |
2008 | ||
1da177e4 LT |
2009 | /* |
2010 | * Defined at | |
631dd1a8 | 2011 | * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf |
1da177e4 LT |
2012 | */ |
2013 | struct SPMITable { | |
2014 | s8 Signature[4]; | |
2015 | u32 Length; | |
2016 | u8 Revision; | |
2017 | u8 Checksum; | |
2018 | s8 OEMID[6]; | |
2019 | s8 OEMTableID[8]; | |
2020 | s8 OEMRevision[4]; | |
2021 | s8 CreatorID[4]; | |
2022 | s8 CreatorRevision[4]; | |
2023 | u8 InterfaceType; | |
2024 | u8 IPMIlegacy; | |
2025 | s16 SpecificationRevision; | |
2026 | ||
2027 | /* | |
2028 | * Bit 0 - SCI interrupt supported | |
2029 | * Bit 1 - I/O APIC/SAPIC | |
2030 | */ | |
2031 | u8 InterruptType; | |
2032 | ||
c305e3d3 CM |
2033 | /* |
2034 | * If bit 0 of InterruptType is set, then this is the SCI | |
2035 | * interrupt in the GPEx_STS register. | |
2036 | */ | |
1da177e4 LT |
2037 | u8 GPE; |
2038 | ||
2039 | s16 Reserved; | |
2040 | ||
c305e3d3 CM |
2041 | /* |
2042 | * If bit 1 of InterruptType is set, then this is the I/O | |
2043 | * APIC/SAPIC interrupt. | |
2044 | */ | |
1da177e4 LT |
2045 | u32 GlobalSystemInterrupt; |
2046 | ||
2047 | /* The actual register address. */ | |
2048 | struct acpi_generic_address addr; | |
2049 | ||
2050 | u8 UID[4]; | |
2051 | ||
2052 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
2053 | }; | |
2054 | ||
2223cbec | 2055 | static int try_init_spmi(struct SPMITable *spmi) |
1da177e4 LT |
2056 | { |
2057 | struct smi_info *info; | |
1da177e4 | 2058 | |
1da177e4 | 2059 | if (spmi->IPMIlegacy != 1) { |
279fbd0c MS |
2060 | printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy); |
2061 | return -ENODEV; | |
1da177e4 LT |
2062 | } |
2063 | ||
de5e2ddf | 2064 | info = smi_info_alloc(); |
b0defcdb | 2065 | if (!info) { |
279fbd0c | 2066 | printk(KERN_ERR PFX "Could not allocate SI data (3)\n"); |
b0defcdb CM |
2067 | return -ENOMEM; |
2068 | } | |
2069 | ||
5fedc4a2 | 2070 | info->addr_source = SI_SPMI; |
279fbd0c | 2071 | printk(KERN_INFO PFX "probing via SPMI\n"); |
1da177e4 | 2072 | |
1da177e4 | 2073 | /* Figure out the interface type. */ |
c305e3d3 | 2074 | switch (spmi->InterfaceType) { |
1da177e4 | 2075 | case 1: /* KCS */ |
b0defcdb | 2076 | info->si_type = SI_KCS; |
1da177e4 | 2077 | break; |
1da177e4 | 2078 | case 2: /* SMIC */ |
b0defcdb | 2079 | info->si_type = SI_SMIC; |
1da177e4 | 2080 | break; |
1da177e4 | 2081 | case 3: /* BT */ |
b0defcdb | 2082 | info->si_type = SI_BT; |
1da177e4 | 2083 | break; |
1da177e4 | 2084 | default: |
279fbd0c MS |
2085 | printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n", |
2086 | spmi->InterfaceType); | |
b0defcdb | 2087 | kfree(info); |
1da177e4 LT |
2088 | return -EIO; |
2089 | } | |
2090 | ||
1da177e4 LT |
2091 | if (spmi->InterruptType & 1) { |
2092 | /* We've got a GPE interrupt. */ | |
2093 | info->irq = spmi->GPE; | |
2094 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
2095 | } else if (spmi->InterruptType & 2) { |
2096 | /* We've got an APIC/SAPIC interrupt. */ | |
2097 | info->irq = spmi->GlobalSystemInterrupt; | |
2098 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
2099 | } else { |
2100 | /* Use the default interrupt setting. */ | |
2101 | info->irq = 0; | |
2102 | info->irq_setup = NULL; | |
2103 | } | |
2104 | ||
15a58ed1 | 2105 | if (spmi->addr.bit_width) { |
35bc37a0 | 2106 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 2107 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 2108 | } else { |
35bc37a0 CM |
2109 | info->io.regspacing = DEFAULT_REGSPACING; |
2110 | } | |
b0defcdb | 2111 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 2112 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 2113 | |
15a58ed1 | 2114 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 2115 | info->io_setup = mem_setup; |
8fe1425a | 2116 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
15a58ed1 | 2117 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 2118 | info->io_setup = port_setup; |
8fe1425a | 2119 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
2120 | } else { |
2121 | kfree(info); | |
279fbd0c | 2122 | printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n"); |
1da177e4 LT |
2123 | return -EIO; |
2124 | } | |
b0defcdb | 2125 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 2126 | |
7bb671e3 YL |
2127 | pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n", |
2128 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2129 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2130 | info->irq); | |
2131 | ||
7faefea6 YL |
2132 | if (add_smi(info)) |
2133 | kfree(info); | |
1da177e4 | 2134 | |
1da177e4 LT |
2135 | return 0; |
2136 | } | |
b0defcdb | 2137 | |
2223cbec | 2138 | static void spmi_find_bmc(void) |
b0defcdb CM |
2139 | { |
2140 | acpi_status status; | |
2141 | struct SPMITable *spmi; | |
2142 | int i; | |
2143 | ||
2144 | if (acpi_disabled) | |
2145 | return; | |
2146 | ||
2147 | if (acpi_failure) | |
2148 | return; | |
2149 | ||
2150 | for (i = 0; ; i++) { | |
15a58ed1 AS |
2151 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
2152 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
2153 | if (status != AE_OK) |
2154 | return; | |
2155 | ||
18a3e0bf | 2156 | try_init_spmi(spmi); |
b0defcdb CM |
2157 | } |
2158 | } | |
9e368fa0 | 2159 | |
2223cbec | 2160 | static int ipmi_pnp_probe(struct pnp_dev *dev, |
9e368fa0 BH |
2161 | const struct pnp_device_id *dev_id) |
2162 | { | |
2163 | struct acpi_device *acpi_dev; | |
2164 | struct smi_info *info; | |
a9e31765 | 2165 | struct resource *res, *res_second; |
9e368fa0 BH |
2166 | acpi_handle handle; |
2167 | acpi_status status; | |
2168 | unsigned long long tmp; | |
2169 | ||
2170 | acpi_dev = pnp_acpi_device(dev); | |
2171 | if (!acpi_dev) | |
2172 | return -ENODEV; | |
2173 | ||
de5e2ddf | 2174 | info = smi_info_alloc(); |
9e368fa0 BH |
2175 | if (!info) |
2176 | return -ENOMEM; | |
2177 | ||
5fedc4a2 | 2178 | info->addr_source = SI_ACPI; |
279fbd0c | 2179 | printk(KERN_INFO PFX "probing via ACPI\n"); |
9e368fa0 BH |
2180 | |
2181 | handle = acpi_dev->handle; | |
16f4232c | 2182 | info->addr_info.acpi_info.acpi_handle = handle; |
9e368fa0 BH |
2183 | |
2184 | /* _IFT tells us the interface type: KCS, BT, etc */ | |
2185 | status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp); | |
2186 | if (ACPI_FAILURE(status)) | |
2187 | goto err_free; | |
2188 | ||
2189 | switch (tmp) { | |
2190 | case 1: | |
2191 | info->si_type = SI_KCS; | |
2192 | break; | |
2193 | case 2: | |
2194 | info->si_type = SI_SMIC; | |
2195 | break; | |
2196 | case 3: | |
2197 | info->si_type = SI_BT; | |
2198 | break; | |
2199 | default: | |
279fbd0c | 2200 | dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp); |
9e368fa0 BH |
2201 | goto err_free; |
2202 | } | |
2203 | ||
279fbd0c MS |
2204 | res = pnp_get_resource(dev, IORESOURCE_IO, 0); |
2205 | if (res) { | |
9e368fa0 BH |
2206 | info->io_setup = port_setup; |
2207 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
9e368fa0 | 2208 | } else { |
279fbd0c MS |
2209 | res = pnp_get_resource(dev, IORESOURCE_MEM, 0); |
2210 | if (res) { | |
2211 | info->io_setup = mem_setup; | |
2212 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2213 | } | |
2214 | } | |
2215 | if (!res) { | |
9e368fa0 BH |
2216 | dev_err(&dev->dev, "no I/O or memory address\n"); |
2217 | goto err_free; | |
2218 | } | |
279fbd0c | 2219 | info->io.addr_data = res->start; |
9e368fa0 BH |
2220 | |
2221 | info->io.regspacing = DEFAULT_REGSPACING; | |
a9e31765 | 2222 | res_second = pnp_get_resource(dev, |
d9e1b6c4 YL |
2223 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? |
2224 | IORESOURCE_IO : IORESOURCE_MEM, | |
2225 | 1); | |
a9e31765 YL |
2226 | if (res_second) { |
2227 | if (res_second->start > info->io.addr_data) | |
2228 | info->io.regspacing = res_second->start - info->io.addr_data; | |
d9e1b6c4 | 2229 | } |
9e368fa0 BH |
2230 | info->io.regsize = DEFAULT_REGSPACING; |
2231 | info->io.regshift = 0; | |
2232 | ||
2233 | /* If _GPE exists, use it; otherwise use standard interrupts */ | |
2234 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); | |
2235 | if (ACPI_SUCCESS(status)) { | |
2236 | info->irq = tmp; | |
2237 | info->irq_setup = acpi_gpe_irq_setup; | |
2238 | } else if (pnp_irq_valid(dev, 0)) { | |
2239 | info->irq = pnp_irq(dev, 0); | |
2240 | info->irq_setup = std_irq_setup; | |
2241 | } | |
2242 | ||
8c8eae27 | 2243 | info->dev = &dev->dev; |
9e368fa0 BH |
2244 | pnp_set_drvdata(dev, info); |
2245 | ||
279fbd0c MS |
2246 | dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n", |
2247 | res, info->io.regsize, info->io.regspacing, | |
2248 | info->irq); | |
2249 | ||
7faefea6 YL |
2250 | if (add_smi(info)) |
2251 | goto err_free; | |
2252 | ||
2253 | return 0; | |
9e368fa0 BH |
2254 | |
2255 | err_free: | |
2256 | kfree(info); | |
2257 | return -EINVAL; | |
2258 | } | |
2259 | ||
39af33fc | 2260 | static void ipmi_pnp_remove(struct pnp_dev *dev) |
9e368fa0 BH |
2261 | { |
2262 | struct smi_info *info = pnp_get_drvdata(dev); | |
2263 | ||
2264 | cleanup_one_si(info); | |
2265 | } | |
2266 | ||
2267 | static const struct pnp_device_id pnp_dev_table[] = { | |
2268 | {"IPI0001", 0}, | |
2269 | {"", 0}, | |
2270 | }; | |
2271 | ||
2272 | static struct pnp_driver ipmi_pnp_driver = { | |
2273 | .name = DEVICE_NAME, | |
2274 | .probe = ipmi_pnp_probe, | |
bcd2982a | 2275 | .remove = ipmi_pnp_remove, |
9e368fa0 BH |
2276 | .id_table = pnp_dev_table, |
2277 | }; | |
1da177e4 LT |
2278 | #endif |
2279 | ||
a9fad4cc | 2280 | #ifdef CONFIG_DMI |
c305e3d3 | 2281 | struct dmi_ipmi_data { |
1da177e4 LT |
2282 | u8 type; |
2283 | u8 addr_space; | |
2284 | unsigned long base_addr; | |
2285 | u8 irq; | |
2286 | u8 offset; | |
2287 | u8 slave_addr; | |
b0defcdb | 2288 | }; |
1da177e4 | 2289 | |
2223cbec | 2290 | static int decode_dmi(const struct dmi_header *dm, |
b0defcdb | 2291 | struct dmi_ipmi_data *dmi) |
1da177e4 | 2292 | { |
1855256c | 2293 | const u8 *data = (const u8 *)dm; |
1da177e4 LT |
2294 | unsigned long base_addr; |
2295 | u8 reg_spacing; | |
b224cd3a | 2296 | u8 len = dm->length; |
1da177e4 | 2297 | |
b0defcdb | 2298 | dmi->type = data[4]; |
1da177e4 LT |
2299 | |
2300 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
2301 | if (len >= 0x11) { | |
2302 | if (base_addr & 1) { | |
2303 | /* I/O */ | |
2304 | base_addr &= 0xFFFE; | |
b0defcdb | 2305 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
c305e3d3 | 2306 | } else |
1da177e4 | 2307 | /* Memory */ |
b0defcdb | 2308 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
c305e3d3 | 2309 | |
1da177e4 LT |
2310 | /* If bit 4 of byte 0x10 is set, then the lsb for the address |
2311 | is odd. */ | |
b0defcdb | 2312 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 2313 | |
b0defcdb | 2314 | dmi->irq = data[0x11]; |
1da177e4 LT |
2315 | |
2316 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 2317 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
c305e3d3 | 2318 | switch (reg_spacing) { |
1da177e4 | 2319 | case 0x00: /* Byte boundaries */ |
b0defcdb | 2320 | dmi->offset = 1; |
1da177e4 LT |
2321 | break; |
2322 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 2323 | dmi->offset = 4; |
1da177e4 LT |
2324 | break; |
2325 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 2326 | dmi->offset = 16; |
1da177e4 LT |
2327 | break; |
2328 | default: | |
2329 | /* Some other interface, just ignore it. */ | |
2330 | return -EIO; | |
2331 | } | |
2332 | } else { | |
2333 | /* Old DMI spec. */ | |
c305e3d3 CM |
2334 | /* |
2335 | * Note that technically, the lower bit of the base | |
92068801 CM |
2336 | * address should be 1 if the address is I/O and 0 if |
2337 | * the address is in memory. So many systems get that | |
2338 | * wrong (and all that I have seen are I/O) so we just | |
2339 | * ignore that bit and assume I/O. Systems that use | |
c305e3d3 CM |
2340 | * memory should use the newer spec, anyway. |
2341 | */ | |
b0defcdb CM |
2342 | dmi->base_addr = base_addr & 0xfffe; |
2343 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
2344 | dmi->offset = 1; | |
1da177e4 LT |
2345 | } |
2346 | ||
b0defcdb | 2347 | dmi->slave_addr = data[6]; |
1da177e4 | 2348 | |
b0defcdb | 2349 | return 0; |
1da177e4 LT |
2350 | } |
2351 | ||
2223cbec | 2352 | static void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 2353 | { |
b0defcdb | 2354 | struct smi_info *info; |
1da177e4 | 2355 | |
de5e2ddf | 2356 | info = smi_info_alloc(); |
b0defcdb | 2357 | if (!info) { |
279fbd0c | 2358 | printk(KERN_ERR PFX "Could not allocate SI data\n"); |
b0defcdb | 2359 | return; |
1da177e4 | 2360 | } |
1da177e4 | 2361 | |
5fedc4a2 | 2362 | info->addr_source = SI_SMBIOS; |
279fbd0c | 2363 | printk(KERN_INFO PFX "probing via SMBIOS\n"); |
1da177e4 | 2364 | |
e8b33617 | 2365 | switch (ipmi_data->type) { |
b0defcdb CM |
2366 | case 0x01: /* KCS */ |
2367 | info->si_type = SI_KCS; | |
2368 | break; | |
2369 | case 0x02: /* SMIC */ | |
2370 | info->si_type = SI_SMIC; | |
2371 | break; | |
2372 | case 0x03: /* BT */ | |
2373 | info->si_type = SI_BT; | |
2374 | break; | |
2375 | default: | |
80cd6920 | 2376 | kfree(info); |
b0defcdb | 2377 | return; |
1da177e4 | 2378 | } |
1da177e4 | 2379 | |
b0defcdb CM |
2380 | switch (ipmi_data->addr_space) { |
2381 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2382 | info->io_setup = mem_setup; |
b0defcdb CM |
2383 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2384 | break; | |
2385 | ||
2386 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2387 | info->io_setup = port_setup; |
b0defcdb CM |
2388 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2389 | break; | |
2390 | ||
2391 | default: | |
1da177e4 | 2392 | kfree(info); |
279fbd0c | 2393 | printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n", |
b0defcdb CM |
2394 | ipmi_data->addr_space); |
2395 | return; | |
1da177e4 | 2396 | } |
b0defcdb | 2397 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2398 | |
b0defcdb CM |
2399 | info->io.regspacing = ipmi_data->offset; |
2400 | if (!info->io.regspacing) | |
1da177e4 LT |
2401 | info->io.regspacing = DEFAULT_REGSPACING; |
2402 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2403 | info->io.regshift = 0; |
1da177e4 LT |
2404 | |
2405 | info->slave_addr = ipmi_data->slave_addr; | |
2406 | ||
b0defcdb CM |
2407 | info->irq = ipmi_data->irq; |
2408 | if (info->irq) | |
2409 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2410 | |
7bb671e3 YL |
2411 | pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n", |
2412 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2413 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2414 | info->irq); | |
2415 | ||
7faefea6 YL |
2416 | if (add_smi(info)) |
2417 | kfree(info); | |
b0defcdb | 2418 | } |
1da177e4 | 2419 | |
2223cbec | 2420 | static void dmi_find_bmc(void) |
b0defcdb | 2421 | { |
1855256c | 2422 | const struct dmi_device *dev = NULL; |
b0defcdb CM |
2423 | struct dmi_ipmi_data data; |
2424 | int rv; | |
2425 | ||
2426 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2427 | memset(&data, 0, sizeof(data)); |
1855256c JG |
2428 | rv = decode_dmi((const struct dmi_header *) dev->device_data, |
2429 | &data); | |
b0defcdb CM |
2430 | if (!rv) |
2431 | try_init_dmi(&data); | |
2432 | } | |
1da177e4 | 2433 | } |
a9fad4cc | 2434 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2435 | |
2436 | #ifdef CONFIG_PCI | |
2437 | ||
b0defcdb CM |
2438 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2439 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2440 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2441 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2442 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2443 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2444 | ||
1da177e4 LT |
2445 | #define PCI_HP_VENDOR_ID 0x103C |
2446 | #define PCI_MMC_DEVICE_ID 0x121A | |
2447 | #define PCI_MMC_ADDR_CW 0x10 | |
2448 | ||
b0defcdb CM |
2449 | static void ipmi_pci_cleanup(struct smi_info *info) |
2450 | { | |
2451 | struct pci_dev *pdev = info->addr_source_data; | |
2452 | ||
2453 | pci_disable_device(pdev); | |
2454 | } | |
1da177e4 | 2455 | |
2223cbec | 2456 | static int ipmi_pci_probe_regspacing(struct smi_info *info) |
a6c16c28 CM |
2457 | { |
2458 | if (info->si_type == SI_KCS) { | |
2459 | unsigned char status; | |
2460 | int regspacing; | |
2461 | ||
2462 | info->io.regsize = DEFAULT_REGSIZE; | |
2463 | info->io.regshift = 0; | |
2464 | info->io_size = 2; | |
2465 | info->handlers = &kcs_smi_handlers; | |
2466 | ||
2467 | /* detect 1, 4, 16byte spacing */ | |
2468 | for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) { | |
2469 | info->io.regspacing = regspacing; | |
2470 | if (info->io_setup(info)) { | |
2471 | dev_err(info->dev, | |
2472 | "Could not setup I/O space\n"); | |
2473 | return DEFAULT_REGSPACING; | |
2474 | } | |
2475 | /* write invalid cmd */ | |
2476 | info->io.outputb(&info->io, 1, 0x10); | |
2477 | /* read status back */ | |
2478 | status = info->io.inputb(&info->io, 1); | |
2479 | info->io_cleanup(info); | |
2480 | if (status) | |
2481 | return regspacing; | |
2482 | regspacing *= 4; | |
2483 | } | |
2484 | } | |
2485 | return DEFAULT_REGSPACING; | |
2486 | } | |
2487 | ||
2223cbec | 2488 | static int ipmi_pci_probe(struct pci_dev *pdev, |
b0defcdb | 2489 | const struct pci_device_id *ent) |
1da177e4 | 2490 | { |
b0defcdb CM |
2491 | int rv; |
2492 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2493 | struct smi_info *info; | |
1da177e4 | 2494 | |
de5e2ddf | 2495 | info = smi_info_alloc(); |
b0defcdb | 2496 | if (!info) |
1cd441f9 | 2497 | return -ENOMEM; |
1da177e4 | 2498 | |
5fedc4a2 | 2499 | info->addr_source = SI_PCI; |
279fbd0c | 2500 | dev_info(&pdev->dev, "probing via PCI"); |
1da177e4 | 2501 | |
b0defcdb CM |
2502 | switch (class_type) { |
2503 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2504 | info->si_type = SI_SMIC; | |
2505 | break; | |
1da177e4 | 2506 | |
b0defcdb CM |
2507 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2508 | info->si_type = SI_KCS; | |
2509 | break; | |
2510 | ||
2511 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2512 | info->si_type = SI_BT; | |
2513 | break; | |
2514 | ||
2515 | default: | |
2516 | kfree(info); | |
279fbd0c | 2517 | dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type); |
1cd441f9 | 2518 | return -ENOMEM; |
1da177e4 LT |
2519 | } |
2520 | ||
b0defcdb CM |
2521 | rv = pci_enable_device(pdev); |
2522 | if (rv) { | |
279fbd0c | 2523 | dev_err(&pdev->dev, "couldn't enable PCI device\n"); |
b0defcdb CM |
2524 | kfree(info); |
2525 | return rv; | |
1da177e4 LT |
2526 | } |
2527 | ||
b0defcdb CM |
2528 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2529 | info->addr_source_data = pdev; | |
1da177e4 | 2530 | |
b0defcdb CM |
2531 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2532 | info->io_setup = port_setup; | |
2533 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2534 | } else { | |
2535 | info->io_setup = mem_setup; | |
2536 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2537 | } |
b0defcdb | 2538 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2539 | |
a6c16c28 CM |
2540 | info->io.regspacing = ipmi_pci_probe_regspacing(info); |
2541 | info->io.regsize = DEFAULT_REGSIZE; | |
b0defcdb | 2542 | info->io.regshift = 0; |
1da177e4 | 2543 | |
b0defcdb CM |
2544 | info->irq = pdev->irq; |
2545 | if (info->irq) | |
2546 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2547 | |
50c812b2 | 2548 | info->dev = &pdev->dev; |
fca3b747 | 2549 | pci_set_drvdata(pdev, info); |
50c812b2 | 2550 | |
279fbd0c MS |
2551 | dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n", |
2552 | &pdev->resource[0], info->io.regsize, info->io.regspacing, | |
2553 | info->irq); | |
2554 | ||
7faefea6 YL |
2555 | if (add_smi(info)) |
2556 | kfree(info); | |
2557 | ||
2558 | return 0; | |
b0defcdb | 2559 | } |
1da177e4 | 2560 | |
39af33fc | 2561 | static void ipmi_pci_remove(struct pci_dev *pdev) |
b0defcdb | 2562 | { |
fca3b747 CM |
2563 | struct smi_info *info = pci_get_drvdata(pdev); |
2564 | cleanup_one_si(info); | |
b0defcdb | 2565 | } |
1da177e4 | 2566 | |
b0defcdb CM |
2567 | static struct pci_device_id ipmi_pci_devices[] = { |
2568 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
248bdd5e KC |
2569 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, |
2570 | { 0, } | |
b0defcdb CM |
2571 | }; |
2572 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2573 | ||
2574 | static struct pci_driver ipmi_pci_driver = { | |
c305e3d3 CM |
2575 | .name = DEVICE_NAME, |
2576 | .id_table = ipmi_pci_devices, | |
2577 | .probe = ipmi_pci_probe, | |
bcd2982a | 2578 | .remove = ipmi_pci_remove, |
b0defcdb CM |
2579 | }; |
2580 | #endif /* CONFIG_PCI */ | |
1da177e4 | 2581 | |
b1608d69 | 2582 | static struct of_device_id ipmi_match[]; |
2223cbec | 2583 | static int ipmi_probe(struct platform_device *dev) |
dba9b4f6 | 2584 | { |
a1e9c9dd | 2585 | #ifdef CONFIG_OF |
b1608d69 | 2586 | const struct of_device_id *match; |
dba9b4f6 CM |
2587 | struct smi_info *info; |
2588 | struct resource resource; | |
da81c3b9 | 2589 | const __be32 *regsize, *regspacing, *regshift; |
61c7a080 | 2590 | struct device_node *np = dev->dev.of_node; |
dba9b4f6 CM |
2591 | int ret; |
2592 | int proplen; | |
2593 | ||
279fbd0c | 2594 | dev_info(&dev->dev, "probing via device tree\n"); |
dba9b4f6 | 2595 | |
b1608d69 GL |
2596 | match = of_match_device(ipmi_match, &dev->dev); |
2597 | if (!match) | |
a1e9c9dd RH |
2598 | return -EINVAL; |
2599 | ||
dba9b4f6 CM |
2600 | ret = of_address_to_resource(np, 0, &resource); |
2601 | if (ret) { | |
2602 | dev_warn(&dev->dev, PFX "invalid address from OF\n"); | |
2603 | return ret; | |
2604 | } | |
2605 | ||
9c25099d | 2606 | regsize = of_get_property(np, "reg-size", &proplen); |
dba9b4f6 CM |
2607 | if (regsize && proplen != 4) { |
2608 | dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); | |
2609 | return -EINVAL; | |
2610 | } | |
2611 | ||
9c25099d | 2612 | regspacing = of_get_property(np, "reg-spacing", &proplen); |
dba9b4f6 CM |
2613 | if (regspacing && proplen != 4) { |
2614 | dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); | |
2615 | return -EINVAL; | |
2616 | } | |
2617 | ||
9c25099d | 2618 | regshift = of_get_property(np, "reg-shift", &proplen); |
dba9b4f6 CM |
2619 | if (regshift && proplen != 4) { |
2620 | dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); | |
2621 | return -EINVAL; | |
2622 | } | |
2623 | ||
de5e2ddf | 2624 | info = smi_info_alloc(); |
dba9b4f6 CM |
2625 | |
2626 | if (!info) { | |
2627 | dev_err(&dev->dev, | |
279fbd0c | 2628 | "could not allocate memory for OF probe\n"); |
dba9b4f6 CM |
2629 | return -ENOMEM; |
2630 | } | |
2631 | ||
b1608d69 | 2632 | info->si_type = (enum si_type) match->data; |
5fedc4a2 | 2633 | info->addr_source = SI_DEVICETREE; |
dba9b4f6 CM |
2634 | info->irq_setup = std_irq_setup; |
2635 | ||
3b7ec117 NC |
2636 | if (resource.flags & IORESOURCE_IO) { |
2637 | info->io_setup = port_setup; | |
2638 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2639 | } else { | |
2640 | info->io_setup = mem_setup; | |
2641 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2642 | } | |
2643 | ||
dba9b4f6 CM |
2644 | info->io.addr_data = resource.start; |
2645 | ||
da81c3b9 RH |
2646 | info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE; |
2647 | info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING; | |
2648 | info->io.regshift = regshift ? be32_to_cpup(regshift) : 0; | |
dba9b4f6 | 2649 | |
61c7a080 | 2650 | info->irq = irq_of_parse_and_map(dev->dev.of_node, 0); |
dba9b4f6 CM |
2651 | info->dev = &dev->dev; |
2652 | ||
279fbd0c | 2653 | dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n", |
dba9b4f6 CM |
2654 | info->io.addr_data, info->io.regsize, info->io.regspacing, |
2655 | info->irq); | |
2656 | ||
9de33df4 | 2657 | dev_set_drvdata(&dev->dev, info); |
dba9b4f6 | 2658 | |
7faefea6 YL |
2659 | if (add_smi(info)) { |
2660 | kfree(info); | |
2661 | return -EBUSY; | |
2662 | } | |
a1e9c9dd | 2663 | #endif |
7faefea6 | 2664 | return 0; |
dba9b4f6 CM |
2665 | } |
2666 | ||
39af33fc | 2667 | static int ipmi_remove(struct platform_device *dev) |
dba9b4f6 | 2668 | { |
a1e9c9dd | 2669 | #ifdef CONFIG_OF |
9de33df4 | 2670 | cleanup_one_si(dev_get_drvdata(&dev->dev)); |
a1e9c9dd | 2671 | #endif |
dba9b4f6 CM |
2672 | return 0; |
2673 | } | |
2674 | ||
2675 | static struct of_device_id ipmi_match[] = | |
2676 | { | |
c305e3d3 CM |
2677 | { .type = "ipmi", .compatible = "ipmi-kcs", |
2678 | .data = (void *)(unsigned long) SI_KCS }, | |
2679 | { .type = "ipmi", .compatible = "ipmi-smic", | |
2680 | .data = (void *)(unsigned long) SI_SMIC }, | |
2681 | { .type = "ipmi", .compatible = "ipmi-bt", | |
2682 | .data = (void *)(unsigned long) SI_BT }, | |
dba9b4f6 CM |
2683 | {}, |
2684 | }; | |
2685 | ||
a1e9c9dd | 2686 | static struct platform_driver ipmi_driver = { |
4018294b | 2687 | .driver = { |
a1e9c9dd | 2688 | .name = DEVICE_NAME, |
4018294b GL |
2689 | .owner = THIS_MODULE, |
2690 | .of_match_table = ipmi_match, | |
2691 | }, | |
a1e9c9dd | 2692 | .probe = ipmi_probe, |
bcd2982a | 2693 | .remove = ipmi_remove, |
dba9b4f6 | 2694 | }; |
dba9b4f6 | 2695 | |
40112ae7 | 2696 | static int wait_for_msg_done(struct smi_info *smi_info) |
1da177e4 | 2697 | { |
50c812b2 | 2698 | enum si_sm_result smi_result; |
1da177e4 LT |
2699 | |
2700 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 2701 | for (;;) { |
c3e7e791 CM |
2702 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2703 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2704 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
2705 | smi_result = smi_info->handlers->event( |
2706 | smi_info->si_sm, 100); | |
c305e3d3 | 2707 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
2708 | smi_result = smi_info->handlers->event( |
2709 | smi_info->si_sm, 0); | |
c305e3d3 | 2710 | } else |
1da177e4 LT |
2711 | break; |
2712 | } | |
40112ae7 | 2713 | if (smi_result == SI_SM_HOSED) |
c305e3d3 CM |
2714 | /* |
2715 | * We couldn't get the state machine to run, so whatever's at | |
2716 | * the port is probably not an IPMI SMI interface. | |
2717 | */ | |
40112ae7 CM |
2718 | return -ENODEV; |
2719 | ||
2720 | return 0; | |
2721 | } | |
2722 | ||
2723 | static int try_get_dev_id(struct smi_info *smi_info) | |
2724 | { | |
2725 | unsigned char msg[2]; | |
2726 | unsigned char *resp; | |
2727 | unsigned long resp_len; | |
2728 | int rv = 0; | |
2729 | ||
2730 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2731 | if (!resp) | |
2732 | return -ENOMEM; | |
2733 | ||
2734 | /* | |
2735 | * Do a Get Device ID command, since it comes back with some | |
2736 | * useful info. | |
2737 | */ | |
2738 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2739 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2740 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2741 | ||
2742 | rv = wait_for_msg_done(smi_info); | |
2743 | if (rv) | |
1da177e4 | 2744 | goto out; |
1da177e4 | 2745 | |
1da177e4 LT |
2746 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, |
2747 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 2748 | |
d8c98618 CM |
2749 | /* Check and record info from the get device id, in case we need it. */ |
2750 | rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); | |
1da177e4 LT |
2751 | |
2752 | out: | |
2753 | kfree(resp); | |
2754 | return rv; | |
2755 | } | |
2756 | ||
40112ae7 CM |
2757 | static int try_enable_event_buffer(struct smi_info *smi_info) |
2758 | { | |
2759 | unsigned char msg[3]; | |
2760 | unsigned char *resp; | |
2761 | unsigned long resp_len; | |
2762 | int rv = 0; | |
2763 | ||
2764 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2765 | if (!resp) | |
2766 | return -ENOMEM; | |
2767 | ||
2768 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2769 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
2770 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2771 | ||
2772 | rv = wait_for_msg_done(smi_info); | |
2773 | if (rv) { | |
279fbd0c MS |
2774 | printk(KERN_WARNING PFX "Error getting response from get" |
2775 | " global enables command, the event buffer is not" | |
40112ae7 CM |
2776 | " enabled.\n"); |
2777 | goto out; | |
2778 | } | |
2779 | ||
2780 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2781 | resp, IPMI_MAX_MSG_LENGTH); | |
2782 | ||
2783 | if (resp_len < 4 || | |
2784 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2785 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
2786 | resp[2] != 0) { | |
279fbd0c MS |
2787 | printk(KERN_WARNING PFX "Invalid return from get global" |
2788 | " enables command, cannot enable the event buffer.\n"); | |
40112ae7 CM |
2789 | rv = -EINVAL; |
2790 | goto out; | |
2791 | } | |
2792 | ||
2793 | if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) | |
2794 | /* buffer is already enabled, nothing to do. */ | |
2795 | goto out; | |
2796 | ||
2797 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2798 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
2799 | msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; | |
2800 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
2801 | ||
2802 | rv = wait_for_msg_done(smi_info); | |
2803 | if (rv) { | |
279fbd0c MS |
2804 | printk(KERN_WARNING PFX "Error getting response from set" |
2805 | " global, enables command, the event buffer is not" | |
40112ae7 CM |
2806 | " enabled.\n"); |
2807 | goto out; | |
2808 | } | |
2809 | ||
2810 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2811 | resp, IPMI_MAX_MSG_LENGTH); | |
2812 | ||
2813 | if (resp_len < 3 || | |
2814 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2815 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
279fbd0c MS |
2816 | printk(KERN_WARNING PFX "Invalid return from get global," |
2817 | "enables command, not enable the event buffer.\n"); | |
40112ae7 CM |
2818 | rv = -EINVAL; |
2819 | goto out; | |
2820 | } | |
2821 | ||
2822 | if (resp[2] != 0) | |
2823 | /* | |
2824 | * An error when setting the event buffer bit means | |
2825 | * that the event buffer is not supported. | |
2826 | */ | |
2827 | rv = -ENOENT; | |
2828 | out: | |
2829 | kfree(resp); | |
2830 | return rv; | |
2831 | } | |
2832 | ||
07412736 | 2833 | static int smi_type_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2834 | { |
07412736 | 2835 | struct smi_info *smi = m->private; |
1da177e4 | 2836 | |
07412736 | 2837 | return seq_printf(m, "%s\n", si_to_str[smi->si_type]); |
1da177e4 LT |
2838 | } |
2839 | ||
07412736 | 2840 | static int smi_type_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2841 | { |
d9dda78b | 2842 | return single_open(file, smi_type_proc_show, PDE_DATA(inode)); |
07412736 AD |
2843 | } |
2844 | ||
2845 | static const struct file_operations smi_type_proc_ops = { | |
2846 | .open = smi_type_proc_open, | |
2847 | .read = seq_read, | |
2848 | .llseek = seq_lseek, | |
2849 | .release = single_release, | |
2850 | }; | |
2851 | ||
2852 | static int smi_si_stats_proc_show(struct seq_file *m, void *v) | |
2853 | { | |
2854 | struct smi_info *smi = m->private; | |
1da177e4 | 2855 | |
07412736 | 2856 | seq_printf(m, "interrupts_enabled: %d\n", |
b0defcdb | 2857 | smi->irq && !smi->interrupt_disabled); |
07412736 | 2858 | seq_printf(m, "short_timeouts: %u\n", |
64959e2d | 2859 | smi_get_stat(smi, short_timeouts)); |
07412736 | 2860 | seq_printf(m, "long_timeouts: %u\n", |
64959e2d | 2861 | smi_get_stat(smi, long_timeouts)); |
07412736 | 2862 | seq_printf(m, "idles: %u\n", |
64959e2d | 2863 | smi_get_stat(smi, idles)); |
07412736 | 2864 | seq_printf(m, "interrupts: %u\n", |
64959e2d | 2865 | smi_get_stat(smi, interrupts)); |
07412736 | 2866 | seq_printf(m, "attentions: %u\n", |
64959e2d | 2867 | smi_get_stat(smi, attentions)); |
07412736 | 2868 | seq_printf(m, "flag_fetches: %u\n", |
64959e2d | 2869 | smi_get_stat(smi, flag_fetches)); |
07412736 | 2870 | seq_printf(m, "hosed_count: %u\n", |
64959e2d | 2871 | smi_get_stat(smi, hosed_count)); |
07412736 | 2872 | seq_printf(m, "complete_transactions: %u\n", |
64959e2d | 2873 | smi_get_stat(smi, complete_transactions)); |
07412736 | 2874 | seq_printf(m, "events: %u\n", |
64959e2d | 2875 | smi_get_stat(smi, events)); |
07412736 | 2876 | seq_printf(m, "watchdog_pretimeouts: %u\n", |
64959e2d | 2877 | smi_get_stat(smi, watchdog_pretimeouts)); |
07412736 | 2878 | seq_printf(m, "incoming_messages: %u\n", |
64959e2d | 2879 | smi_get_stat(smi, incoming_messages)); |
07412736 AD |
2880 | return 0; |
2881 | } | |
1da177e4 | 2882 | |
07412736 AD |
2883 | static int smi_si_stats_proc_open(struct inode *inode, struct file *file) |
2884 | { | |
d9dda78b | 2885 | return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode)); |
b361e27b CM |
2886 | } |
2887 | ||
07412736 AD |
2888 | static const struct file_operations smi_si_stats_proc_ops = { |
2889 | .open = smi_si_stats_proc_open, | |
2890 | .read = seq_read, | |
2891 | .llseek = seq_lseek, | |
2892 | .release = single_release, | |
2893 | }; | |
2894 | ||
2895 | static int smi_params_proc_show(struct seq_file *m, void *v) | |
b361e27b | 2896 | { |
07412736 | 2897 | struct smi_info *smi = m->private; |
b361e27b | 2898 | |
07412736 | 2899 | return seq_printf(m, |
b361e27b CM |
2900 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", |
2901 | si_to_str[smi->si_type], | |
2902 | addr_space_to_str[smi->io.addr_type], | |
2903 | smi->io.addr_data, | |
2904 | smi->io.regspacing, | |
2905 | smi->io.regsize, | |
2906 | smi->io.regshift, | |
2907 | smi->irq, | |
2908 | smi->slave_addr); | |
1da177e4 LT |
2909 | } |
2910 | ||
07412736 AD |
2911 | static int smi_params_proc_open(struct inode *inode, struct file *file) |
2912 | { | |
d9dda78b | 2913 | return single_open(file, smi_params_proc_show, PDE_DATA(inode)); |
07412736 AD |
2914 | } |
2915 | ||
2916 | static const struct file_operations smi_params_proc_ops = { | |
2917 | .open = smi_params_proc_open, | |
2918 | .read = seq_read, | |
2919 | .llseek = seq_lseek, | |
2920 | .release = single_release, | |
2921 | }; | |
2922 | ||
3ae0e0f9 CM |
2923 | /* |
2924 | * oem_data_avail_to_receive_msg_avail | |
2925 | * @info - smi_info structure with msg_flags set | |
2926 | * | |
2927 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
2928 | * Returns 1 indicating need to re-run handle_flags(). | |
2929 | */ | |
2930 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
2931 | { | |
e8b33617 | 2932 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 2933 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
2934 | return 1; |
2935 | } | |
2936 | ||
2937 | /* | |
2938 | * setup_dell_poweredge_oem_data_handler | |
2939 | * @info - smi_info.device_id must be populated | |
2940 | * | |
2941 | * Systems that match, but have firmware version < 1.40 may assert | |
2942 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
2943 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
2944 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
2945 | * as RECEIVE_MSG_AVAIL instead. | |
2946 | * | |
2947 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
2948 | * assert the OEM[012] bits, and if it did, the driver would have to | |
2949 | * change to handle that properly, we don't actually check for the | |
2950 | * firmware version. | |
2951 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
2952 | * Device Revision = 0x80 | |
2953 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
2954 | * Firmware Revision2 = 0x40 BCD encoded | |
2955 | * IPMI Version = 0x51 IPMI 1.5 | |
2956 | * Manufacturer ID = A2 02 00 Dell IANA | |
2957 | * | |
d5a2b89a CM |
2958 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
2959 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
2960 | * | |
3ae0e0f9 CM |
2961 | */ |
2962 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
2963 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
2964 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 2965 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
2966 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
2967 | { | |
2968 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 2969 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
2970 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
2971 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 2972 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
2973 | smi_info->oem_data_avail_handler = |
2974 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
2975 | } else if (ipmi_version_major(id) < 1 || |
2976 | (ipmi_version_major(id) == 1 && | |
2977 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
2978 | smi_info->oem_data_avail_handler = |
2979 | oem_data_avail_to_receive_msg_avail; | |
2980 | } | |
3ae0e0f9 CM |
2981 | } |
2982 | } | |
2983 | ||
ea94027b CM |
2984 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
2985 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
2986 | { | |
2987 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
2988 | ||
25985edc | 2989 | /* Make it a response */ |
ea94027b CM |
2990 | msg->rsp[0] = msg->data[0] | 4; |
2991 | msg->rsp[1] = msg->data[1]; | |
2992 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
2993 | msg->rsp_size = 3; | |
2994 | smi_info->curr_msg = NULL; | |
2995 | deliver_recv_msg(smi_info, msg); | |
2996 | } | |
2997 | ||
2998 | /* | |
2999 | * dell_poweredge_bt_xaction_handler | |
3000 | * @info - smi_info.device_id must be populated | |
3001 | * | |
3002 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
3003 | * not respond to a Get SDR command if the length of the data | |
3004 | * requested is exactly 0x3A, which leads to command timeouts and no | |
3005 | * data returned. This intercepts such commands, and causes userspace | |
3006 | * callers to try again with a different-sized buffer, which succeeds. | |
3007 | */ | |
3008 | ||
3009 | #define STORAGE_NETFN 0x0A | |
3010 | #define STORAGE_CMD_GET_SDR 0x23 | |
3011 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
3012 | unsigned long unused, | |
3013 | void *in) | |
3014 | { | |
3015 | struct smi_info *smi_info = in; | |
3016 | unsigned char *data = smi_info->curr_msg->data; | |
3017 | unsigned int size = smi_info->curr_msg->data_size; | |
3018 | if (size >= 8 && | |
3019 | (data[0]>>2) == STORAGE_NETFN && | |
3020 | data[1] == STORAGE_CMD_GET_SDR && | |
3021 | data[7] == 0x3A) { | |
3022 | return_hosed_msg_badsize(smi_info); | |
3023 | return NOTIFY_STOP; | |
3024 | } | |
3025 | return NOTIFY_DONE; | |
3026 | } | |
3027 | ||
3028 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
3029 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
3030 | }; | |
3031 | ||
3032 | /* | |
3033 | * setup_dell_poweredge_bt_xaction_handler | |
3034 | * @info - smi_info.device_id must be filled in already | |
3035 | * | |
3036 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
3037 | * when we know what function to use there. | |
3038 | */ | |
3039 | static void | |
3040 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
3041 | { | |
3042 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3043 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
3044 | smi_info->si_type == SI_BT) |
3045 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
3046 | } | |
3047 | ||
3ae0e0f9 CM |
3048 | /* |
3049 | * setup_oem_data_handler | |
3050 | * @info - smi_info.device_id must be filled in already | |
3051 | * | |
3052 | * Fills in smi_info.device_id.oem_data_available_handler | |
3053 | * when we know what function to use there. | |
3054 | */ | |
3055 | ||
3056 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
3057 | { | |
3058 | setup_dell_poweredge_oem_data_handler(smi_info); | |
3059 | } | |
3060 | ||
ea94027b CM |
3061 | static void setup_xaction_handlers(struct smi_info *smi_info) |
3062 | { | |
3063 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
3064 | } | |
3065 | ||
a9a2c44f CM |
3066 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
3067 | { | |
453823ba | 3068 | if (smi_info->intf) { |
c305e3d3 CM |
3069 | /* |
3070 | * The timer and thread are only running if the | |
3071 | * interface has been started up and registered. | |
3072 | */ | |
453823ba CM |
3073 | if (smi_info->thread != NULL) |
3074 | kthread_stop(smi_info->thread); | |
3075 | del_timer_sync(&smi_info->si_timer); | |
3076 | } | |
a9a2c44f CM |
3077 | } |
3078 | ||
0bbed20e | 3079 | static struct ipmi_default_vals |
b0defcdb CM |
3080 | { |
3081 | int type; | |
3082 | int port; | |
7420884c | 3083 | } ipmi_defaults[] = |
b0defcdb CM |
3084 | { |
3085 | { .type = SI_KCS, .port = 0xca2 }, | |
3086 | { .type = SI_SMIC, .port = 0xca9 }, | |
3087 | { .type = SI_BT, .port = 0xe4 }, | |
3088 | { .port = 0 } | |
3089 | }; | |
3090 | ||
2223cbec | 3091 | static void default_find_bmc(void) |
b0defcdb CM |
3092 | { |
3093 | struct smi_info *info; | |
3094 | int i; | |
3095 | ||
3096 | for (i = 0; ; i++) { | |
3097 | if (!ipmi_defaults[i].port) | |
3098 | break; | |
68e1ee62 | 3099 | #ifdef CONFIG_PPC |
4ff31d77 CK |
3100 | if (check_legacy_ioport(ipmi_defaults[i].port)) |
3101 | continue; | |
3102 | #endif | |
de5e2ddf | 3103 | info = smi_info_alloc(); |
a09f4855 AM |
3104 | if (!info) |
3105 | return; | |
4ff31d77 | 3106 | |
5fedc4a2 | 3107 | info->addr_source = SI_DEFAULT; |
b0defcdb CM |
3108 | |
3109 | info->si_type = ipmi_defaults[i].type; | |
3110 | info->io_setup = port_setup; | |
3111 | info->io.addr_data = ipmi_defaults[i].port; | |
3112 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
3113 | ||
3114 | info->io.addr = NULL; | |
3115 | info->io.regspacing = DEFAULT_REGSPACING; | |
3116 | info->io.regsize = DEFAULT_REGSPACING; | |
3117 | info->io.regshift = 0; | |
3118 | ||
2407d77a MG |
3119 | if (add_smi(info) == 0) { |
3120 | if ((try_smi_init(info)) == 0) { | |
3121 | /* Found one... */ | |
279fbd0c | 3122 | printk(KERN_INFO PFX "Found default %s" |
2407d77a MG |
3123 | " state machine at %s address 0x%lx\n", |
3124 | si_to_str[info->si_type], | |
3125 | addr_space_to_str[info->io.addr_type], | |
3126 | info->io.addr_data); | |
3127 | } else | |
3128 | cleanup_one_si(info); | |
7faefea6 YL |
3129 | } else { |
3130 | kfree(info); | |
b0defcdb CM |
3131 | } |
3132 | } | |
3133 | } | |
3134 | ||
3135 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 3136 | { |
b0defcdb | 3137 | struct smi_info *e; |
1da177e4 | 3138 | |
b0defcdb CM |
3139 | list_for_each_entry(e, &smi_infos, link) { |
3140 | if (e->io.addr_type != info->io.addr_type) | |
3141 | continue; | |
3142 | if (e->io.addr_data == info->io.addr_data) | |
3143 | return 0; | |
3144 | } | |
1da177e4 | 3145 | |
b0defcdb CM |
3146 | return 1; |
3147 | } | |
1da177e4 | 3148 | |
2407d77a | 3149 | static int add_smi(struct smi_info *new_smi) |
b0defcdb | 3150 | { |
2407d77a | 3151 | int rv = 0; |
b0defcdb | 3152 | |
279fbd0c | 3153 | printk(KERN_INFO PFX "Adding %s-specified %s state machine", |
2407d77a MG |
3154 | ipmi_addr_src_to_str[new_smi->addr_source], |
3155 | si_to_str[new_smi->si_type]); | |
d6dfd131 | 3156 | mutex_lock(&smi_infos_lock); |
b0defcdb | 3157 | if (!is_new_interface(new_smi)) { |
7bb671e3 | 3158 | printk(KERN_CONT " duplicate interface\n"); |
b0defcdb CM |
3159 | rv = -EBUSY; |
3160 | goto out_err; | |
3161 | } | |
1da177e4 | 3162 | |
2407d77a MG |
3163 | printk(KERN_CONT "\n"); |
3164 | ||
1da177e4 LT |
3165 | /* So we know not to free it unless we have allocated one. */ |
3166 | new_smi->intf = NULL; | |
3167 | new_smi->si_sm = NULL; | |
3168 | new_smi->handlers = NULL; | |
3169 | ||
2407d77a MG |
3170 | list_add_tail(&new_smi->link, &smi_infos); |
3171 | ||
3172 | out_err: | |
3173 | mutex_unlock(&smi_infos_lock); | |
3174 | return rv; | |
3175 | } | |
3176 | ||
3177 | static int try_smi_init(struct smi_info *new_smi) | |
3178 | { | |
3179 | int rv = 0; | |
3180 | int i; | |
3181 | ||
279fbd0c | 3182 | printk(KERN_INFO PFX "Trying %s-specified %s state" |
2407d77a MG |
3183 | " machine at %s address 0x%lx, slave address 0x%x," |
3184 | " irq %d\n", | |
3185 | ipmi_addr_src_to_str[new_smi->addr_source], | |
3186 | si_to_str[new_smi->si_type], | |
3187 | addr_space_to_str[new_smi->io.addr_type], | |
3188 | new_smi->io.addr_data, | |
3189 | new_smi->slave_addr, new_smi->irq); | |
3190 | ||
b0defcdb CM |
3191 | switch (new_smi->si_type) { |
3192 | case SI_KCS: | |
1da177e4 | 3193 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
3194 | break; |
3195 | ||
3196 | case SI_SMIC: | |
1da177e4 | 3197 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
3198 | break; |
3199 | ||
3200 | case SI_BT: | |
1da177e4 | 3201 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
3202 | break; |
3203 | ||
3204 | default: | |
1da177e4 LT |
3205 | /* No support for anything else yet. */ |
3206 | rv = -EIO; | |
3207 | goto out_err; | |
3208 | } | |
3209 | ||
3210 | /* Allocate the state machine's data and initialize it. */ | |
3211 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 3212 | if (!new_smi->si_sm) { |
279fbd0c MS |
3213 | printk(KERN_ERR PFX |
3214 | "Could not allocate state machine memory\n"); | |
1da177e4 LT |
3215 | rv = -ENOMEM; |
3216 | goto out_err; | |
3217 | } | |
3218 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
3219 | &new_smi->io); | |
3220 | ||
3221 | /* Now that we know the I/O size, we can set up the I/O. */ | |
3222 | rv = new_smi->io_setup(new_smi); | |
3223 | if (rv) { | |
279fbd0c | 3224 | printk(KERN_ERR PFX "Could not set up I/O space\n"); |
1da177e4 LT |
3225 | goto out_err; |
3226 | } | |
3227 | ||
1da177e4 LT |
3228 | /* Do low-level detection first. */ |
3229 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb | 3230 | if (new_smi->addr_source) |
279fbd0c | 3231 | printk(KERN_INFO PFX "Interface detection failed\n"); |
1da177e4 LT |
3232 | rv = -ENODEV; |
3233 | goto out_err; | |
3234 | } | |
3235 | ||
c305e3d3 CM |
3236 | /* |
3237 | * Attempt a get device id command. If it fails, we probably | |
3238 | * don't have a BMC here. | |
3239 | */ | |
1da177e4 | 3240 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
3241 | if (rv) { |
3242 | if (new_smi->addr_source) | |
279fbd0c | 3243 | printk(KERN_INFO PFX "There appears to be no BMC" |
b0defcdb | 3244 | " at this location\n"); |
1da177e4 | 3245 | goto out_err; |
b0defcdb | 3246 | } |
1da177e4 | 3247 | |
3ae0e0f9 | 3248 | setup_oem_data_handler(new_smi); |
ea94027b | 3249 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 3250 | |
1da177e4 LT |
3251 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); |
3252 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
3253 | new_smi->curr_msg = NULL; | |
3254 | atomic_set(&new_smi->req_events, 0); | |
3255 | new_smi->run_to_completion = 0; | |
64959e2d CM |
3256 | for (i = 0; i < SI_NUM_STATS; i++) |
3257 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 | 3258 | |
ea4078ca | 3259 | new_smi->interrupt_disabled = 1; |
a9a2c44f | 3260 | atomic_set(&new_smi->stop_operation, 0); |
b0defcdb CM |
3261 | new_smi->intf_num = smi_num; |
3262 | smi_num++; | |
1da177e4 | 3263 | |
40112ae7 CM |
3264 | rv = try_enable_event_buffer(new_smi); |
3265 | if (rv == 0) | |
3266 | new_smi->has_event_buffer = 1; | |
3267 | ||
c305e3d3 CM |
3268 | /* |
3269 | * Start clearing the flags before we enable interrupts or the | |
3270 | * timer to avoid racing with the timer. | |
3271 | */ | |
1da177e4 LT |
3272 | start_clear_flags(new_smi); |
3273 | /* IRQ is defined to be set when non-zero. */ | |
3274 | if (new_smi->irq) | |
3275 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
3276 | ||
50c812b2 | 3277 | if (!new_smi->dev) { |
c305e3d3 CM |
3278 | /* |
3279 | * If we don't already have a device from something | |
3280 | * else (like PCI), then register a new one. | |
3281 | */ | |
50c812b2 CM |
3282 | new_smi->pdev = platform_device_alloc("ipmi_si", |
3283 | new_smi->intf_num); | |
8b32b5d0 | 3284 | if (!new_smi->pdev) { |
279fbd0c MS |
3285 | printk(KERN_ERR PFX |
3286 | "Unable to allocate platform device\n"); | |
453823ba | 3287 | goto out_err; |
50c812b2 CM |
3288 | } |
3289 | new_smi->dev = &new_smi->pdev->dev; | |
fe2d5ffc | 3290 | new_smi->dev->driver = &ipmi_driver.driver; |
50c812b2 | 3291 | |
b48f5457 | 3292 | rv = platform_device_add(new_smi->pdev); |
50c812b2 | 3293 | if (rv) { |
279fbd0c MS |
3294 | printk(KERN_ERR PFX |
3295 | "Unable to register system interface device:" | |
50c812b2 CM |
3296 | " %d\n", |
3297 | rv); | |
453823ba | 3298 | goto out_err; |
50c812b2 CM |
3299 | } |
3300 | new_smi->dev_registered = 1; | |
3301 | } | |
3302 | ||
1da177e4 LT |
3303 | rv = ipmi_register_smi(&handlers, |
3304 | new_smi, | |
50c812b2 CM |
3305 | &new_smi->device_id, |
3306 | new_smi->dev, | |
759643b8 | 3307 | "bmc", |
453823ba | 3308 | new_smi->slave_addr); |
1da177e4 | 3309 | if (rv) { |
279fbd0c MS |
3310 | dev_err(new_smi->dev, "Unable to register device: error %d\n", |
3311 | rv); | |
1da177e4 LT |
3312 | goto out_err_stop_timer; |
3313 | } | |
3314 | ||
3315 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
07412736 | 3316 | &smi_type_proc_ops, |
99b76233 | 3317 | new_smi); |
1da177e4 | 3318 | if (rv) { |
279fbd0c | 3319 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3320 | goto out_err_stop_timer; |
3321 | } | |
3322 | ||
3323 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
07412736 | 3324 | &smi_si_stats_proc_ops, |
99b76233 | 3325 | new_smi); |
1da177e4 | 3326 | if (rv) { |
279fbd0c | 3327 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3328 | goto out_err_stop_timer; |
3329 | } | |
3330 | ||
b361e27b | 3331 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
07412736 | 3332 | &smi_params_proc_ops, |
99b76233 | 3333 | new_smi); |
b361e27b | 3334 | if (rv) { |
279fbd0c | 3335 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
b361e27b CM |
3336 | goto out_err_stop_timer; |
3337 | } | |
3338 | ||
279fbd0c MS |
3339 | dev_info(new_smi->dev, "IPMI %s interface initialized\n", |
3340 | si_to_str[new_smi->si_type]); | |
1da177e4 LT |
3341 | |
3342 | return 0; | |
3343 | ||
3344 | out_err_stop_timer: | |
a9a2c44f CM |
3345 | atomic_inc(&new_smi->stop_operation); |
3346 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
3347 | |
3348 | out_err: | |
2407d77a MG |
3349 | new_smi->interrupt_disabled = 1; |
3350 | ||
3351 | if (new_smi->intf) { | |
1da177e4 | 3352 | ipmi_unregister_smi(new_smi->intf); |
2407d77a MG |
3353 | new_smi->intf = NULL; |
3354 | } | |
1da177e4 | 3355 | |
2407d77a | 3356 | if (new_smi->irq_cleanup) { |
b0defcdb | 3357 | new_smi->irq_cleanup(new_smi); |
2407d77a MG |
3358 | new_smi->irq_cleanup = NULL; |
3359 | } | |
1da177e4 | 3360 | |
c305e3d3 CM |
3361 | /* |
3362 | * Wait until we know that we are out of any interrupt | |
3363 | * handlers might have been running before we freed the | |
3364 | * interrupt. | |
3365 | */ | |
fbd568a3 | 3366 | synchronize_sched(); |
1da177e4 LT |
3367 | |
3368 | if (new_smi->si_sm) { | |
3369 | if (new_smi->handlers) | |
3370 | new_smi->handlers->cleanup(new_smi->si_sm); | |
3371 | kfree(new_smi->si_sm); | |
2407d77a | 3372 | new_smi->si_sm = NULL; |
1da177e4 | 3373 | } |
2407d77a | 3374 | if (new_smi->addr_source_cleanup) { |
b0defcdb | 3375 | new_smi->addr_source_cleanup(new_smi); |
2407d77a MG |
3376 | new_smi->addr_source_cleanup = NULL; |
3377 | } | |
3378 | if (new_smi->io_cleanup) { | |
7767e126 | 3379 | new_smi->io_cleanup(new_smi); |
2407d77a MG |
3380 | new_smi->io_cleanup = NULL; |
3381 | } | |
1da177e4 | 3382 | |
2407d77a | 3383 | if (new_smi->dev_registered) { |
50c812b2 | 3384 | platform_device_unregister(new_smi->pdev); |
2407d77a MG |
3385 | new_smi->dev_registered = 0; |
3386 | } | |
b0defcdb | 3387 | |
1da177e4 LT |
3388 | return rv; |
3389 | } | |
3390 | ||
2223cbec | 3391 | static int init_ipmi_si(void) |
1da177e4 | 3392 | { |
1da177e4 LT |
3393 | int i; |
3394 | char *str; | |
50c812b2 | 3395 | int rv; |
2407d77a | 3396 | struct smi_info *e; |
06ee4594 | 3397 | enum ipmi_addr_src type = SI_INVALID; |
1da177e4 LT |
3398 | |
3399 | if (initialized) | |
3400 | return 0; | |
3401 | initialized = 1; | |
3402 | ||
f2afae46 CM |
3403 | if (si_tryplatform) { |
3404 | rv = platform_driver_register(&ipmi_driver); | |
3405 | if (rv) { | |
3406 | printk(KERN_ERR PFX "Unable to register " | |
3407 | "driver: %d\n", rv); | |
3408 | return rv; | |
3409 | } | |
50c812b2 CM |
3410 | } |
3411 | ||
1da177e4 LT |
3412 | /* Parse out the si_type string into its components. */ |
3413 | str = si_type_str; | |
3414 | if (*str != '\0') { | |
e8b33617 | 3415 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
3416 | si_type[i] = str; |
3417 | str = strchr(str, ','); | |
3418 | if (str) { | |
3419 | *str = '\0'; | |
3420 | str++; | |
3421 | } else { | |
3422 | break; | |
3423 | } | |
3424 | } | |
3425 | } | |
3426 | ||
1fdd75bd | 3427 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 3428 | |
d8cc5267 | 3429 | /* If the user gave us a device, they presumably want us to use it */ |
a1e9c9dd | 3430 | if (!hardcode_find_bmc()) |
d8cc5267 | 3431 | return 0; |
d8cc5267 | 3432 | |
b0defcdb | 3433 | #ifdef CONFIG_PCI |
f2afae46 CM |
3434 | if (si_trypci) { |
3435 | rv = pci_register_driver(&ipmi_pci_driver); | |
3436 | if (rv) | |
3437 | printk(KERN_ERR PFX "Unable to register " | |
3438 | "PCI driver: %d\n", rv); | |
3439 | else | |
3440 | pci_registered = 1; | |
3441 | } | |
b0defcdb CM |
3442 | #endif |
3443 | ||
754d4531 | 3444 | #ifdef CONFIG_ACPI |
d941aeae CM |
3445 | if (si_tryacpi) { |
3446 | pnp_register_driver(&ipmi_pnp_driver); | |
3447 | pnp_registered = 1; | |
3448 | } | |
754d4531 MG |
3449 | #endif |
3450 | ||
3451 | #ifdef CONFIG_DMI | |
d941aeae CM |
3452 | if (si_trydmi) |
3453 | dmi_find_bmc(); | |
754d4531 MG |
3454 | #endif |
3455 | ||
3456 | #ifdef CONFIG_ACPI | |
d941aeae CM |
3457 | if (si_tryacpi) |
3458 | spmi_find_bmc(); | |
754d4531 MG |
3459 | #endif |
3460 | ||
06ee4594 MG |
3461 | /* We prefer devices with interrupts, but in the case of a machine |
3462 | with multiple BMCs we assume that there will be several instances | |
3463 | of a given type so if we succeed in registering a type then also | |
3464 | try to register everything else of the same type */ | |
d8cc5267 | 3465 | |
2407d77a MG |
3466 | mutex_lock(&smi_infos_lock); |
3467 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 MG |
3468 | /* Try to register a device if it has an IRQ and we either |
3469 | haven't successfully registered a device yet or this | |
3470 | device has the same type as one we successfully registered */ | |
3471 | if (e->irq && (!type || e->addr_source == type)) { | |
d8cc5267 | 3472 | if (!try_smi_init(e)) { |
06ee4594 | 3473 | type = e->addr_source; |
d8cc5267 MG |
3474 | } |
3475 | } | |
3476 | } | |
3477 | ||
06ee4594 MG |
3478 | /* type will only have been set if we successfully registered an si */ |
3479 | if (type) { | |
3480 | mutex_unlock(&smi_infos_lock); | |
3481 | return 0; | |
3482 | } | |
3483 | ||
d8cc5267 MG |
3484 | /* Fall back to the preferred device */ |
3485 | ||
3486 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 | 3487 | if (!e->irq && (!type || e->addr_source == type)) { |
d8cc5267 | 3488 | if (!try_smi_init(e)) { |
06ee4594 | 3489 | type = e->addr_source; |
d8cc5267 MG |
3490 | } |
3491 | } | |
2407d77a MG |
3492 | } |
3493 | mutex_unlock(&smi_infos_lock); | |
3494 | ||
06ee4594 MG |
3495 | if (type) |
3496 | return 0; | |
3497 | ||
b0defcdb | 3498 | if (si_trydefaults) { |
d6dfd131 | 3499 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3500 | if (list_empty(&smi_infos)) { |
3501 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 3502 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3503 | default_find_bmc(); |
2407d77a | 3504 | } else |
d6dfd131 | 3505 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3506 | } |
3507 | ||
d6dfd131 | 3508 | mutex_lock(&smi_infos_lock); |
b361e27b | 3509 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 3510 | mutex_unlock(&smi_infos_lock); |
d2478521 | 3511 | cleanup_ipmi_si(); |
279fbd0c MS |
3512 | printk(KERN_WARNING PFX |
3513 | "Unable to find any System Interface(s)\n"); | |
1da177e4 | 3514 | return -ENODEV; |
b0defcdb | 3515 | } else { |
d6dfd131 | 3516 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3517 | return 0; |
1da177e4 | 3518 | } |
1da177e4 LT |
3519 | } |
3520 | module_init(init_ipmi_si); | |
3521 | ||
b361e27b | 3522 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 | 3523 | { |
2407d77a | 3524 | int rv = 0; |
1da177e4 LT |
3525 | unsigned long flags; |
3526 | ||
b0defcdb | 3527 | if (!to_clean) |
1da177e4 LT |
3528 | return; |
3529 | ||
b0defcdb CM |
3530 | list_del(&to_clean->link); |
3531 | ||
ee6cd5f8 | 3532 | /* Tell the driver that we are shutting down. */ |
a9a2c44f | 3533 | atomic_inc(&to_clean->stop_operation); |
b0defcdb | 3534 | |
c305e3d3 CM |
3535 | /* |
3536 | * Make sure the timer and thread are stopped and will not run | |
3537 | * again. | |
3538 | */ | |
a9a2c44f | 3539 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 3540 | |
c305e3d3 CM |
3541 | /* |
3542 | * Timeouts are stopped, now make sure the interrupts are off | |
3543 | * for the device. A little tricky with locks to make sure | |
3544 | * there are no races. | |
3545 | */ | |
ee6cd5f8 CM |
3546 | spin_lock_irqsave(&to_clean->si_lock, flags); |
3547 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3548 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3549 | poll(to_clean); | |
3550 | schedule_timeout_uninterruptible(1); | |
3551 | spin_lock_irqsave(&to_clean->si_lock, flags); | |
3552 | } | |
3553 | disable_si_irq(to_clean); | |
3554 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3555 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3556 | poll(to_clean); | |
3557 | schedule_timeout_uninterruptible(1); | |
3558 | } | |
3559 | ||
3560 | /* Clean up interrupts and make sure that everything is done. */ | |
3561 | if (to_clean->irq_cleanup) | |
3562 | to_clean->irq_cleanup(to_clean); | |
e8b33617 | 3563 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 3564 | poll(to_clean); |
da4cd8df | 3565 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
3566 | } |
3567 | ||
2407d77a MG |
3568 | if (to_clean->intf) |
3569 | rv = ipmi_unregister_smi(to_clean->intf); | |
3570 | ||
1da177e4 | 3571 | if (rv) { |
279fbd0c | 3572 | printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n", |
1da177e4 LT |
3573 | rv); |
3574 | } | |
3575 | ||
2407d77a MG |
3576 | if (to_clean->handlers) |
3577 | to_clean->handlers->cleanup(to_clean->si_sm); | |
1da177e4 LT |
3578 | |
3579 | kfree(to_clean->si_sm); | |
3580 | ||
b0defcdb CM |
3581 | if (to_clean->addr_source_cleanup) |
3582 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
3583 | if (to_clean->io_cleanup) |
3584 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
3585 | |
3586 | if (to_clean->dev_registered) | |
3587 | platform_device_unregister(to_clean->pdev); | |
3588 | ||
3589 | kfree(to_clean); | |
1da177e4 LT |
3590 | } |
3591 | ||
0dcf334c | 3592 | static void cleanup_ipmi_si(void) |
1da177e4 | 3593 | { |
b0defcdb | 3594 | struct smi_info *e, *tmp_e; |
1da177e4 | 3595 | |
b0defcdb | 3596 | if (!initialized) |
1da177e4 LT |
3597 | return; |
3598 | ||
b0defcdb | 3599 | #ifdef CONFIG_PCI |
56480287 MG |
3600 | if (pci_registered) |
3601 | pci_unregister_driver(&ipmi_pci_driver); | |
b0defcdb | 3602 | #endif |
27d0567a | 3603 | #ifdef CONFIG_ACPI |
561f8182 YL |
3604 | if (pnp_registered) |
3605 | pnp_unregister_driver(&ipmi_pnp_driver); | |
9e368fa0 | 3606 | #endif |
b0defcdb | 3607 | |
a1e9c9dd | 3608 | platform_driver_unregister(&ipmi_driver); |
dba9b4f6 | 3609 | |
d6dfd131 | 3610 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3611 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
3612 | cleanup_one_si(e); | |
d6dfd131 | 3613 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3614 | } |
3615 | module_exit(cleanup_ipmi_si); | |
3616 | ||
3617 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 3618 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
3619 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
3620 | " system interfaces."); |