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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" | |
b224cd3a | 64 | #include <linux/dmi.h> |
b361e27b CM |
65 | #include <linux/string.h> |
66 | #include <linux/ctype.h> | |
9e368fa0 | 67 | #include <linux/pnp.h> |
11c675ce SR |
68 | #include <linux/of_device.h> |
69 | #include <linux/of_platform.h> | |
672d8eaf RH |
70 | #include <linux/of_address.h> |
71 | #include <linux/of_irq.h> | |
dba9b4f6 | 72 | |
fdbeb7de TB |
73 | #ifdef CONFIG_PARISC |
74 | #include <asm/hardware.h> /* for register_parisc_driver() stuff */ | |
75 | #include <asm/parisc-device.h> | |
76 | #endif | |
77 | ||
b361e27b | 78 | #define PFX "ipmi_si: " |
1da177e4 LT |
79 | |
80 | /* Measure times between events in the driver. */ | |
81 | #undef DEBUG_TIMING | |
82 | ||
83 | /* Call every 10 ms. */ | |
84 | #define SI_TIMEOUT_TIME_USEC 10000 | |
85 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
86 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
87 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
c305e3d3 | 88 | short timeout */ |
1da177e4 LT |
89 | |
90 | enum si_intf_state { | |
91 | SI_NORMAL, | |
92 | SI_GETTING_FLAGS, | |
93 | SI_GETTING_EVENTS, | |
94 | SI_CLEARING_FLAGS, | |
95 | SI_CLEARING_FLAGS_THEN_SET_IRQ, | |
96 | SI_GETTING_MESSAGES, | |
97 | SI_ENABLE_INTERRUPTS1, | |
ee6cd5f8 CM |
98 | SI_ENABLE_INTERRUPTS2, |
99 | SI_DISABLE_INTERRUPTS1, | |
100 | SI_DISABLE_INTERRUPTS2 | |
1da177e4 LT |
101 | /* FIXME - add watchdog stuff. */ |
102 | }; | |
103 | ||
9dbf68f9 CM |
104 | /* Some BT-specific defines we need here. */ |
105 | #define IPMI_BT_INTMASK_REG 2 | |
106 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
107 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
108 | ||
1da177e4 LT |
109 | enum si_type { |
110 | SI_KCS, SI_SMIC, SI_BT | |
111 | }; | |
b361e27b | 112 | static char *si_to_str[] = { "kcs", "smic", "bt" }; |
1da177e4 | 113 | |
5fedc4a2 MG |
114 | static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI", |
115 | "ACPI", "SMBIOS", "PCI", | |
116 | "device-tree", "default" }; | |
117 | ||
50c812b2 CM |
118 | #define DEVICE_NAME "ipmi_si" |
119 | ||
a1e9c9dd | 120 | static struct platform_driver ipmi_driver; |
64959e2d CM |
121 | |
122 | /* | |
123 | * Indexes into stats[] in smi_info below. | |
124 | */ | |
ba8ff1c6 CM |
125 | enum si_stat_indexes { |
126 | /* | |
127 | * Number of times the driver requested a timer while an operation | |
128 | * was in progress. | |
129 | */ | |
130 | SI_STAT_short_timeouts = 0, | |
131 | ||
132 | /* | |
133 | * Number of times the driver requested a timer while nothing was in | |
134 | * progress. | |
135 | */ | |
136 | SI_STAT_long_timeouts, | |
137 | ||
138 | /* Number of times the interface was idle while being polled. */ | |
139 | SI_STAT_idles, | |
140 | ||
141 | /* Number of interrupts the driver handled. */ | |
142 | SI_STAT_interrupts, | |
143 | ||
144 | /* Number of time the driver got an ATTN from the hardware. */ | |
145 | SI_STAT_attentions, | |
64959e2d | 146 | |
ba8ff1c6 CM |
147 | /* Number of times the driver requested flags from the hardware. */ |
148 | SI_STAT_flag_fetches, | |
149 | ||
150 | /* Number of times the hardware didn't follow the state machine. */ | |
151 | SI_STAT_hosed_count, | |
152 | ||
153 | /* Number of completed messages. */ | |
154 | SI_STAT_complete_transactions, | |
155 | ||
156 | /* Number of IPMI events received from the hardware. */ | |
157 | SI_STAT_events, | |
158 | ||
159 | /* Number of watchdog pretimeouts. */ | |
160 | SI_STAT_watchdog_pretimeouts, | |
161 | ||
b3834be5 | 162 | /* Number of asynchronous messages received. */ |
ba8ff1c6 CM |
163 | SI_STAT_incoming_messages, |
164 | ||
165 | ||
166 | /* This *must* remain last, add new values above this. */ | |
167 | SI_NUM_STATS | |
168 | }; | |
64959e2d | 169 | |
c305e3d3 | 170 | struct smi_info { |
a9a2c44f | 171 | int intf_num; |
1da177e4 LT |
172 | ipmi_smi_t intf; |
173 | struct si_sm_data *si_sm; | |
174 | struct si_sm_handlers *handlers; | |
175 | enum si_type si_type; | |
176 | spinlock_t si_lock; | |
1da177e4 LT |
177 | struct list_head xmit_msgs; |
178 | struct list_head hp_xmit_msgs; | |
179 | struct ipmi_smi_msg *curr_msg; | |
180 | enum si_intf_state si_state; | |
181 | ||
c305e3d3 CM |
182 | /* |
183 | * Used to handle the various types of I/O that can occur with | |
184 | * IPMI | |
185 | */ | |
1da177e4 LT |
186 | struct si_sm_io io; |
187 | int (*io_setup)(struct smi_info *info); | |
188 | void (*io_cleanup)(struct smi_info *info); | |
189 | int (*irq_setup)(struct smi_info *info); | |
190 | void (*irq_cleanup)(struct smi_info *info); | |
191 | unsigned int io_size; | |
5fedc4a2 | 192 | enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */ |
b0defcdb CM |
193 | void (*addr_source_cleanup)(struct smi_info *info); |
194 | void *addr_source_data; | |
1da177e4 | 195 | |
c305e3d3 CM |
196 | /* |
197 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
198 | * when handle_flags() needs to be re-run or 0 indicating it | |
199 | * set si_state itself. | |
200 | */ | |
3ae0e0f9 CM |
201 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
202 | ||
c305e3d3 CM |
203 | /* |
204 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
205 | * is set to hold the flags until we are done handling everything | |
206 | * from the flags. | |
207 | */ | |
1da177e4 LT |
208 | #define RECEIVE_MSG_AVAIL 0x01 |
209 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
210 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
211 | #define OEM0_DATA_AVAIL 0x20 |
212 | #define OEM1_DATA_AVAIL 0x40 | |
213 | #define OEM2_DATA_AVAIL 0x80 | |
214 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
215 | OEM1_DATA_AVAIL | \ |
216 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
217 | unsigned char msg_flags; |
218 | ||
40112ae7 CM |
219 | /* Does the BMC have an event buffer? */ |
220 | char has_event_buffer; | |
221 | ||
c305e3d3 CM |
222 | /* |
223 | * If set to true, this will request events the next time the | |
224 | * state machine is idle. | |
225 | */ | |
1da177e4 LT |
226 | atomic_t req_events; |
227 | ||
c305e3d3 CM |
228 | /* |
229 | * If true, run the state machine to completion on every send | |
230 | * call. Generally used after a panic to make sure stuff goes | |
231 | * out. | |
232 | */ | |
1da177e4 LT |
233 | int run_to_completion; |
234 | ||
235 | /* The I/O port of an SI interface. */ | |
236 | int port; | |
237 | ||
c305e3d3 CM |
238 | /* |
239 | * The space between start addresses of the two ports. For | |
240 | * instance, if the first port is 0xca2 and the spacing is 4, then | |
241 | * the second port is 0xca6. | |
242 | */ | |
1da177e4 LT |
243 | unsigned int spacing; |
244 | ||
245 | /* zero if no irq; */ | |
246 | int irq; | |
247 | ||
248 | /* The timer for this si. */ | |
249 | struct timer_list si_timer; | |
250 | ||
251 | /* The time (in jiffies) the last timeout occurred at. */ | |
252 | unsigned long last_timeout_jiffies; | |
253 | ||
254 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 255 | atomic_t stop_operation; |
1da177e4 | 256 | |
c305e3d3 CM |
257 | /* |
258 | * The driver will disable interrupts when it gets into a | |
259 | * situation where it cannot handle messages due to lack of | |
260 | * memory. Once that situation clears up, it will re-enable | |
261 | * interrupts. | |
262 | */ | |
1da177e4 LT |
263 | int interrupt_disabled; |
264 | ||
50c812b2 | 265 | /* From the get device id response... */ |
3ae0e0f9 | 266 | struct ipmi_device_id device_id; |
1da177e4 | 267 | |
50c812b2 CM |
268 | /* Driver model stuff. */ |
269 | struct device *dev; | |
270 | struct platform_device *pdev; | |
271 | ||
c305e3d3 CM |
272 | /* |
273 | * True if we allocated the device, false if it came from | |
274 | * someplace else (like PCI). | |
275 | */ | |
50c812b2 CM |
276 | int dev_registered; |
277 | ||
1da177e4 LT |
278 | /* Slave address, could be reported from DMI. */ |
279 | unsigned char slave_addr; | |
280 | ||
281 | /* Counters and things for the proc filesystem. */ | |
64959e2d | 282 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 283 | |
c305e3d3 | 284 | struct task_struct *thread; |
b0defcdb CM |
285 | |
286 | struct list_head link; | |
16f4232c | 287 | union ipmi_smi_info_union addr_info; |
1da177e4 LT |
288 | }; |
289 | ||
64959e2d CM |
290 | #define smi_inc_stat(smi, stat) \ |
291 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
292 | #define smi_get_stat(smi, stat) \ | |
293 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
294 | ||
a51f4a81 CM |
295 | #define SI_MAX_PARMS 4 |
296 | ||
297 | static int force_kipmid[SI_MAX_PARMS]; | |
298 | static int num_force_kipmid; | |
56480287 MG |
299 | #ifdef CONFIG_PCI |
300 | static int pci_registered; | |
301 | #endif | |
561f8182 YL |
302 | #ifdef CONFIG_ACPI |
303 | static int pnp_registered; | |
304 | #endif | |
fdbeb7de TB |
305 | #ifdef CONFIG_PARISC |
306 | static int parisc_registered; | |
307 | #endif | |
a51f4a81 | 308 | |
ae74e823 MW |
309 | static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; |
310 | static int num_max_busy_us; | |
311 | ||
b361e27b CM |
312 | static int unload_when_empty = 1; |
313 | ||
2407d77a | 314 | static int add_smi(struct smi_info *smi); |
b0defcdb | 315 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 316 | static void cleanup_one_si(struct smi_info *to_clean); |
d2478521 | 317 | static void cleanup_ipmi_si(void); |
b0defcdb | 318 | |
e041c683 | 319 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 320 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 321 | { |
e041c683 | 322 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
323 | } |
324 | ||
1da177e4 LT |
325 | static void deliver_recv_msg(struct smi_info *smi_info, |
326 | struct ipmi_smi_msg *msg) | |
327 | { | |
7adf579c CM |
328 | /* Deliver the message to the upper layer. */ |
329 | ipmi_smi_msg_received(smi_info->intf, msg); | |
1da177e4 LT |
330 | } |
331 | ||
4d7cbac7 | 332 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
333 | { |
334 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
335 | ||
4d7cbac7 CM |
336 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
337 | cCode = IPMI_ERR_UNSPECIFIED; | |
338 | /* else use it as is */ | |
339 | ||
25985edc | 340 | /* Make it a response */ |
1da177e4 LT |
341 | msg->rsp[0] = msg->data[0] | 4; |
342 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 343 | msg->rsp[2] = cCode; |
1da177e4 LT |
344 | msg->rsp_size = 3; |
345 | ||
346 | smi_info->curr_msg = NULL; | |
347 | deliver_recv_msg(smi_info, msg); | |
348 | } | |
349 | ||
350 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
351 | { | |
352 | int rv; | |
353 | struct list_head *entry = NULL; | |
354 | #ifdef DEBUG_TIMING | |
355 | struct timeval t; | |
356 | #endif | |
357 | ||
1da177e4 | 358 | /* Pick the high priority queue first. */ |
b0defcdb | 359 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 360 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 361 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
362 | entry = smi_info->xmit_msgs.next; |
363 | } | |
364 | ||
b0defcdb | 365 | if (!entry) { |
1da177e4 LT |
366 | smi_info->curr_msg = NULL; |
367 | rv = SI_SM_IDLE; | |
368 | } else { | |
369 | int err; | |
370 | ||
371 | list_del(entry); | |
372 | smi_info->curr_msg = list_entry(entry, | |
373 | struct ipmi_smi_msg, | |
374 | link); | |
375 | #ifdef DEBUG_TIMING | |
376 | do_gettimeofday(&t); | |
c305e3d3 | 377 | printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 | 378 | #endif |
e041c683 AS |
379 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
380 | 0, smi_info); | |
ea94027b CM |
381 | if (err & NOTIFY_STOP_MASK) { |
382 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
383 | goto out; | |
384 | } | |
1da177e4 LT |
385 | err = smi_info->handlers->start_transaction( |
386 | smi_info->si_sm, | |
387 | smi_info->curr_msg->data, | |
388 | smi_info->curr_msg->data_size); | |
c305e3d3 | 389 | if (err) |
4d7cbac7 | 390 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
391 | |
392 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
393 | } | |
c305e3d3 | 394 | out: |
1da177e4 LT |
395 | return rv; |
396 | } | |
397 | ||
398 | static void start_enable_irq(struct smi_info *smi_info) | |
399 | { | |
400 | unsigned char msg[2]; | |
401 | ||
c305e3d3 CM |
402 | /* |
403 | * If we are enabling interrupts, we have to tell the | |
404 | * BMC to use them. | |
405 | */ | |
1da177e4 LT |
406 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
407 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
408 | ||
409 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
410 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
411 | } | |
412 | ||
ee6cd5f8 CM |
413 | static void start_disable_irq(struct smi_info *smi_info) |
414 | { | |
415 | unsigned char msg[2]; | |
416 | ||
417 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
418 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
419 | ||
420 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
421 | smi_info->si_state = SI_DISABLE_INTERRUPTS1; | |
422 | } | |
423 | ||
1da177e4 LT |
424 | static void start_clear_flags(struct smi_info *smi_info) |
425 | { | |
426 | unsigned char msg[3]; | |
427 | ||
428 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
429 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
430 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
431 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
432 | ||
433 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
434 | smi_info->si_state = SI_CLEARING_FLAGS; | |
435 | } | |
436 | ||
c305e3d3 CM |
437 | /* |
438 | * When we have a situtaion where we run out of memory and cannot | |
439 | * allocate messages, we just leave them in the BMC and run the system | |
440 | * polled until we can allocate some memory. Once we have some | |
441 | * memory, we will re-enable the interrupt. | |
442 | */ | |
1da177e4 LT |
443 | static inline void disable_si_irq(struct smi_info *smi_info) |
444 | { | |
b0defcdb | 445 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
ee6cd5f8 | 446 | start_disable_irq(smi_info); |
1da177e4 | 447 | smi_info->interrupt_disabled = 1; |
ea4078ca MG |
448 | if (!atomic_read(&smi_info->stop_operation)) |
449 | mod_timer(&smi_info->si_timer, | |
450 | jiffies + SI_TIMEOUT_JIFFIES); | |
1da177e4 LT |
451 | } |
452 | } | |
453 | ||
454 | static inline void enable_si_irq(struct smi_info *smi_info) | |
455 | { | |
456 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
ee6cd5f8 | 457 | start_enable_irq(smi_info); |
1da177e4 LT |
458 | smi_info->interrupt_disabled = 0; |
459 | } | |
460 | } | |
461 | ||
462 | static void handle_flags(struct smi_info *smi_info) | |
463 | { | |
3ae0e0f9 | 464 | retry: |
1da177e4 LT |
465 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
466 | /* Watchdog pre-timeout */ | |
64959e2d | 467 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 LT |
468 | |
469 | start_clear_flags(smi_info); | |
470 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
1da177e4 | 471 | ipmi_smi_watchdog_pretimeout(smi_info->intf); |
1da177e4 LT |
472 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { |
473 | /* Messages available. */ | |
474 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 475 | if (!smi_info->curr_msg) { |
1da177e4 LT |
476 | disable_si_irq(smi_info); |
477 | smi_info->si_state = SI_NORMAL; | |
478 | return; | |
479 | } | |
480 | enable_si_irq(smi_info); | |
481 | ||
482 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
483 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
484 | smi_info->curr_msg->data_size = 2; | |
485 | ||
486 | smi_info->handlers->start_transaction( | |
487 | smi_info->si_sm, | |
488 | smi_info->curr_msg->data, | |
489 | smi_info->curr_msg->data_size); | |
490 | smi_info->si_state = SI_GETTING_MESSAGES; | |
491 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
492 | /* Events available. */ | |
493 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 494 | if (!smi_info->curr_msg) { |
1da177e4 LT |
495 | disable_si_irq(smi_info); |
496 | smi_info->si_state = SI_NORMAL; | |
497 | return; | |
498 | } | |
499 | enable_si_irq(smi_info); | |
500 | ||
501 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
502 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
503 | smi_info->curr_msg->data_size = 2; | |
504 | ||
505 | smi_info->handlers->start_transaction( | |
506 | smi_info->si_sm, | |
507 | smi_info->curr_msg->data, | |
508 | smi_info->curr_msg->data_size); | |
509 | smi_info->si_state = SI_GETTING_EVENTS; | |
4064d5ef | 510 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 511 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
512 | if (smi_info->oem_data_avail_handler(smi_info)) |
513 | goto retry; | |
c305e3d3 | 514 | } else |
1da177e4 | 515 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
516 | } |
517 | ||
518 | static void handle_transaction_done(struct smi_info *smi_info) | |
519 | { | |
520 | struct ipmi_smi_msg *msg; | |
521 | #ifdef DEBUG_TIMING | |
522 | struct timeval t; | |
523 | ||
524 | do_gettimeofday(&t); | |
c305e3d3 | 525 | printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
526 | #endif |
527 | switch (smi_info->si_state) { | |
528 | case SI_NORMAL: | |
b0defcdb | 529 | if (!smi_info->curr_msg) |
1da177e4 LT |
530 | break; |
531 | ||
532 | smi_info->curr_msg->rsp_size | |
533 | = smi_info->handlers->get_result( | |
534 | smi_info->si_sm, | |
535 | smi_info->curr_msg->rsp, | |
536 | IPMI_MAX_MSG_LENGTH); | |
537 | ||
c305e3d3 CM |
538 | /* |
539 | * Do this here becase deliver_recv_msg() releases the | |
540 | * lock, and a new message can be put in during the | |
541 | * time the lock is released. | |
542 | */ | |
1da177e4 LT |
543 | msg = smi_info->curr_msg; |
544 | smi_info->curr_msg = NULL; | |
545 | deliver_recv_msg(smi_info, msg); | |
546 | break; | |
547 | ||
548 | case SI_GETTING_FLAGS: | |
549 | { | |
550 | unsigned char msg[4]; | |
551 | unsigned int len; | |
552 | ||
553 | /* We got the flags from the SMI, now handle them. */ | |
554 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
555 | if (msg[2] != 0) { | |
c305e3d3 | 556 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
557 | smi_info->si_state = SI_NORMAL; |
558 | } else if (len < 4) { | |
c305e3d3 CM |
559 | /* |
560 | * Hmm, no flags. That's technically illegal, but | |
561 | * don't use uninitialized data. | |
562 | */ | |
1da177e4 LT |
563 | smi_info->si_state = SI_NORMAL; |
564 | } else { | |
565 | smi_info->msg_flags = msg[3]; | |
566 | handle_flags(smi_info); | |
567 | } | |
568 | break; | |
569 | } | |
570 | ||
571 | case SI_CLEARING_FLAGS: | |
572 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
573 | { | |
574 | unsigned char msg[3]; | |
575 | ||
576 | /* We cleared the flags. */ | |
577 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
578 | if (msg[2] != 0) { | |
579 | /* Error clearing flags */ | |
279fbd0c MS |
580 | dev_warn(smi_info->dev, |
581 | "Error clearing flags: %2.2x\n", msg[2]); | |
1da177e4 LT |
582 | } |
583 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
584 | start_enable_irq(smi_info); | |
585 | else | |
586 | smi_info->si_state = SI_NORMAL; | |
587 | break; | |
588 | } | |
589 | ||
590 | case SI_GETTING_EVENTS: | |
591 | { | |
592 | smi_info->curr_msg->rsp_size | |
593 | = smi_info->handlers->get_result( | |
594 | smi_info->si_sm, | |
595 | smi_info->curr_msg->rsp, | |
596 | IPMI_MAX_MSG_LENGTH); | |
597 | ||
c305e3d3 CM |
598 | /* |
599 | * Do this here becase deliver_recv_msg() releases the | |
600 | * lock, and a new message can be put in during the | |
601 | * time the lock is released. | |
602 | */ | |
1da177e4 LT |
603 | msg = smi_info->curr_msg; |
604 | smi_info->curr_msg = NULL; | |
605 | if (msg->rsp[2] != 0) { | |
606 | /* Error getting event, probably done. */ | |
607 | msg->done(msg); | |
608 | ||
609 | /* Take off the event flag. */ | |
610 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
611 | handle_flags(smi_info); | |
612 | } else { | |
64959e2d | 613 | smi_inc_stat(smi_info, events); |
1da177e4 | 614 | |
c305e3d3 CM |
615 | /* |
616 | * Do this before we deliver the message | |
617 | * because delivering the message releases the | |
618 | * lock and something else can mess with the | |
619 | * state. | |
620 | */ | |
1da177e4 LT |
621 | handle_flags(smi_info); |
622 | ||
623 | deliver_recv_msg(smi_info, msg); | |
624 | } | |
625 | break; | |
626 | } | |
627 | ||
628 | case SI_GETTING_MESSAGES: | |
629 | { | |
630 | smi_info->curr_msg->rsp_size | |
631 | = smi_info->handlers->get_result( | |
632 | smi_info->si_sm, | |
633 | smi_info->curr_msg->rsp, | |
634 | IPMI_MAX_MSG_LENGTH); | |
635 | ||
c305e3d3 CM |
636 | /* |
637 | * Do this here becase deliver_recv_msg() releases the | |
638 | * lock, and a new message can be put in during the | |
639 | * time the lock is released. | |
640 | */ | |
1da177e4 LT |
641 | msg = smi_info->curr_msg; |
642 | smi_info->curr_msg = NULL; | |
643 | if (msg->rsp[2] != 0) { | |
644 | /* Error getting event, probably done. */ | |
645 | msg->done(msg); | |
646 | ||
647 | /* Take off the msg flag. */ | |
648 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
649 | handle_flags(smi_info); | |
650 | } else { | |
64959e2d | 651 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 652 | |
c305e3d3 CM |
653 | /* |
654 | * Do this before we deliver the message | |
655 | * because delivering the message releases the | |
656 | * lock and something else can mess with the | |
657 | * state. | |
658 | */ | |
1da177e4 LT |
659 | handle_flags(smi_info); |
660 | ||
661 | deliver_recv_msg(smi_info, msg); | |
662 | } | |
663 | break; | |
664 | } | |
665 | ||
666 | case SI_ENABLE_INTERRUPTS1: | |
667 | { | |
668 | unsigned char msg[4]; | |
669 | ||
670 | /* We got the flags from the SMI, now handle them. */ | |
671 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
672 | if (msg[2] != 0) { | |
0849bfec CM |
673 | dev_warn(smi_info->dev, |
674 | "Couldn't get irq info: %x.\n", msg[2]); | |
675 | dev_warn(smi_info->dev, | |
676 | "Maybe ok, but ipmi might run very slowly.\n"); | |
1da177e4 LT |
677 | smi_info->si_state = SI_NORMAL; |
678 | } else { | |
679 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
680 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
ee6cd5f8 CM |
681 | msg[2] = (msg[3] | |
682 | IPMI_BMC_RCV_MSG_INTR | | |
683 | IPMI_BMC_EVT_MSG_INTR); | |
1da177e4 LT |
684 | smi_info->handlers->start_transaction( |
685 | smi_info->si_sm, msg, 3); | |
686 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
687 | } | |
688 | break; | |
689 | } | |
690 | ||
691 | case SI_ENABLE_INTERRUPTS2: | |
692 | { | |
693 | unsigned char msg[4]; | |
694 | ||
695 | /* We got the flags from the SMI, now handle them. */ | |
696 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
0849bfec CM |
697 | if (msg[2] != 0) { |
698 | dev_warn(smi_info->dev, | |
699 | "Couldn't set irq info: %x.\n", msg[2]); | |
700 | dev_warn(smi_info->dev, | |
701 | "Maybe ok, but ipmi might run very slowly.\n"); | |
702 | } else | |
ea4078ca | 703 | smi_info->interrupt_disabled = 0; |
1da177e4 LT |
704 | smi_info->si_state = SI_NORMAL; |
705 | break; | |
706 | } | |
ee6cd5f8 CM |
707 | |
708 | case SI_DISABLE_INTERRUPTS1: | |
709 | { | |
710 | unsigned char msg[4]; | |
711 | ||
712 | /* We got the flags from the SMI, now handle them. */ | |
713 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
714 | if (msg[2] != 0) { | |
279fbd0c MS |
715 | dev_warn(smi_info->dev, "Could not disable interrupts" |
716 | ", failed get.\n"); | |
ee6cd5f8 CM |
717 | smi_info->si_state = SI_NORMAL; |
718 | } else { | |
719 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
720 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
721 | msg[2] = (msg[3] & | |
722 | ~(IPMI_BMC_RCV_MSG_INTR | | |
723 | IPMI_BMC_EVT_MSG_INTR)); | |
724 | smi_info->handlers->start_transaction( | |
725 | smi_info->si_sm, msg, 3); | |
726 | smi_info->si_state = SI_DISABLE_INTERRUPTS2; | |
727 | } | |
728 | break; | |
729 | } | |
730 | ||
731 | case SI_DISABLE_INTERRUPTS2: | |
732 | { | |
733 | unsigned char msg[4]; | |
734 | ||
735 | /* We got the flags from the SMI, now handle them. */ | |
736 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
737 | if (msg[2] != 0) { | |
279fbd0c MS |
738 | dev_warn(smi_info->dev, "Could not disable interrupts" |
739 | ", failed set.\n"); | |
ee6cd5f8 CM |
740 | } |
741 | smi_info->si_state = SI_NORMAL; | |
742 | break; | |
743 | } | |
1da177e4 LT |
744 | } |
745 | } | |
746 | ||
c305e3d3 CM |
747 | /* |
748 | * Called on timeouts and events. Timeouts should pass the elapsed | |
749 | * time, interrupts should pass in zero. Must be called with | |
750 | * si_lock held and interrupts disabled. | |
751 | */ | |
1da177e4 LT |
752 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
753 | int time) | |
754 | { | |
755 | enum si_sm_result si_sm_result; | |
756 | ||
757 | restart: | |
c305e3d3 CM |
758 | /* |
759 | * There used to be a loop here that waited a little while | |
760 | * (around 25us) before giving up. That turned out to be | |
761 | * pointless, the minimum delays I was seeing were in the 300us | |
762 | * range, which is far too long to wait in an interrupt. So | |
763 | * we just run until the state machine tells us something | |
764 | * happened or it needs a delay. | |
765 | */ | |
1da177e4 LT |
766 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
767 | time = 0; | |
768 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 769 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 770 | |
c305e3d3 | 771 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 772 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
773 | |
774 | handle_transaction_done(smi_info); | |
775 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 776 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 777 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 778 | |
c305e3d3 CM |
779 | /* |
780 | * Do the before return_hosed_msg, because that | |
781 | * releases the lock. | |
782 | */ | |
1da177e4 LT |
783 | smi_info->si_state = SI_NORMAL; |
784 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
785 | /* |
786 | * If we were handling a user message, format | |
787 | * a response to send to the upper layer to | |
788 | * tell it about the error. | |
789 | */ | |
4d7cbac7 | 790 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
791 | } |
792 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
793 | } | |
794 | ||
4ea18425 CM |
795 | /* |
796 | * We prefer handling attn over new messages. But don't do | |
797 | * this if there is not yet an upper layer to handle anything. | |
798 | */ | |
c305e3d3 | 799 | if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) { |
1da177e4 LT |
800 | unsigned char msg[2]; |
801 | ||
64959e2d | 802 | smi_inc_stat(smi_info, attentions); |
1da177e4 | 803 | |
c305e3d3 CM |
804 | /* |
805 | * Got a attn, send down a get message flags to see | |
806 | * what's causing it. It would be better to handle | |
807 | * this in the upper layer, but due to the way | |
808 | * interrupts work with the SMI, that's not really | |
809 | * possible. | |
810 | */ | |
1da177e4 LT |
811 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
812 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
813 | ||
814 | smi_info->handlers->start_transaction( | |
815 | smi_info->si_sm, msg, 2); | |
816 | smi_info->si_state = SI_GETTING_FLAGS; | |
817 | goto restart; | |
818 | } | |
819 | ||
820 | /* If we are currently idle, try to start the next message. */ | |
821 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 822 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
823 | |
824 | si_sm_result = start_next_msg(smi_info); | |
825 | if (si_sm_result != SI_SM_IDLE) | |
826 | goto restart; | |
c305e3d3 | 827 | } |
1da177e4 LT |
828 | |
829 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
830 | && (atomic_read(&smi_info->req_events))) { |
831 | /* | |
832 | * We are idle and the upper layer requested that I fetch | |
833 | * events, so do so. | |
834 | */ | |
55162fb1 | 835 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 836 | |
55162fb1 CM |
837 | smi_info->curr_msg = ipmi_alloc_smi_msg(); |
838 | if (!smi_info->curr_msg) | |
839 | goto out; | |
1da177e4 | 840 | |
55162fb1 CM |
841 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
842 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
843 | smi_info->curr_msg->data_size = 2; | |
1da177e4 LT |
844 | |
845 | smi_info->handlers->start_transaction( | |
55162fb1 CM |
846 | smi_info->si_sm, |
847 | smi_info->curr_msg->data, | |
848 | smi_info->curr_msg->data_size); | |
849 | smi_info->si_state = SI_GETTING_EVENTS; | |
1da177e4 LT |
850 | goto restart; |
851 | } | |
55162fb1 | 852 | out: |
1da177e4 LT |
853 | return si_sm_result; |
854 | } | |
855 | ||
856 | static void sender(void *send_info, | |
857 | struct ipmi_smi_msg *msg, | |
858 | int priority) | |
859 | { | |
860 | struct smi_info *smi_info = send_info; | |
861 | enum si_sm_result result; | |
862 | unsigned long flags; | |
863 | #ifdef DEBUG_TIMING | |
864 | struct timeval t; | |
865 | #endif | |
866 | ||
b361e27b CM |
867 | if (atomic_read(&smi_info->stop_operation)) { |
868 | msg->rsp[0] = msg->data[0] | 4; | |
869 | msg->rsp[1] = msg->data[1]; | |
870 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
871 | msg->rsp_size = 3; | |
872 | deliver_recv_msg(smi_info, msg); | |
873 | return; | |
874 | } | |
875 | ||
1da177e4 LT |
876 | #ifdef DEBUG_TIMING |
877 | do_gettimeofday(&t); | |
878 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
879 | #endif | |
880 | ||
881 | if (smi_info->run_to_completion) { | |
bda4c30a CM |
882 | /* |
883 | * If we are running to completion, then throw it in | |
884 | * the list and run transactions until everything is | |
885 | * clear. Priority doesn't matter here. | |
886 | */ | |
887 | ||
888 | /* | |
889 | * Run to completion means we are single-threaded, no | |
890 | * need for locks. | |
891 | */ | |
1da177e4 LT |
892 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); |
893 | ||
1da177e4 LT |
894 | result = smi_event_handler(smi_info, 0); |
895 | while (result != SI_SM_IDLE) { | |
896 | udelay(SI_SHORT_TIMEOUT_USEC); | |
897 | result = smi_event_handler(smi_info, | |
898 | SI_SHORT_TIMEOUT_USEC); | |
899 | } | |
1da177e4 | 900 | return; |
1da177e4 | 901 | } |
1da177e4 | 902 | |
f60adf42 | 903 | spin_lock_irqsave(&smi_info->si_lock, flags); |
bda4c30a CM |
904 | if (priority > 0) |
905 | list_add_tail(&msg->link, &smi_info->hp_xmit_msgs); | |
906 | else | |
907 | list_add_tail(&msg->link, &smi_info->xmit_msgs); | |
bda4c30a | 908 | |
b88e7693 | 909 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) { |
f60adf42 CM |
910 | /* |
911 | * last_timeout_jiffies is updated here to avoid | |
912 | * smi_timeout() handler passing very large time_diff | |
913 | * value to smi_event_handler() that causes | |
914 | * the send command to abort. | |
915 | */ | |
916 | smi_info->last_timeout_jiffies = jiffies; | |
917 | ||
918 | mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
919 | ||
920 | if (smi_info->thread) | |
921 | wake_up_process(smi_info->thread); | |
922 | ||
1da177e4 | 923 | start_next_msg(smi_info); |
b88e7693 S |
924 | smi_event_handler(smi_info, 0); |
925 | } | |
bda4c30a | 926 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
927 | } |
928 | ||
929 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
930 | { | |
931 | struct smi_info *smi_info = send_info; | |
932 | enum si_sm_result result; | |
1da177e4 LT |
933 | |
934 | smi_info->run_to_completion = i_run_to_completion; | |
935 | if (i_run_to_completion) { | |
936 | result = smi_event_handler(smi_info, 0); | |
937 | while (result != SI_SM_IDLE) { | |
938 | udelay(SI_SHORT_TIMEOUT_USEC); | |
939 | result = smi_event_handler(smi_info, | |
940 | SI_SHORT_TIMEOUT_USEC); | |
941 | } | |
942 | } | |
1da177e4 LT |
943 | } |
944 | ||
ae74e823 MW |
945 | /* |
946 | * Use -1 in the nsec value of the busy waiting timespec to tell that | |
947 | * we are spinning in kipmid looking for something and not delaying | |
948 | * between checks | |
949 | */ | |
950 | static inline void ipmi_si_set_not_busy(struct timespec *ts) | |
951 | { | |
952 | ts->tv_nsec = -1; | |
953 | } | |
954 | static inline int ipmi_si_is_busy(struct timespec *ts) | |
955 | { | |
956 | return ts->tv_nsec != -1; | |
957 | } | |
958 | ||
959 | static int ipmi_thread_busy_wait(enum si_sm_result smi_result, | |
960 | const struct smi_info *smi_info, | |
961 | struct timespec *busy_until) | |
962 | { | |
963 | unsigned int max_busy_us = 0; | |
964 | ||
965 | if (smi_info->intf_num < num_max_busy_us) | |
966 | max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; | |
967 | if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) | |
968 | ipmi_si_set_not_busy(busy_until); | |
969 | else if (!ipmi_si_is_busy(busy_until)) { | |
970 | getnstimeofday(busy_until); | |
971 | timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); | |
972 | } else { | |
973 | struct timespec now; | |
974 | getnstimeofday(&now); | |
975 | if (unlikely(timespec_compare(&now, busy_until) > 0)) { | |
976 | ipmi_si_set_not_busy(busy_until); | |
977 | return 0; | |
978 | } | |
979 | } | |
980 | return 1; | |
981 | } | |
982 | ||
983 | ||
984 | /* | |
985 | * A busy-waiting loop for speeding up IPMI operation. | |
986 | * | |
987 | * Lousy hardware makes this hard. This is only enabled for systems | |
988 | * that are not BT and do not have interrupts. It starts spinning | |
989 | * when an operation is complete or until max_busy tells it to stop | |
990 | * (if that is enabled). See the paragraph on kimid_max_busy_us in | |
991 | * Documentation/IPMI.txt for details. | |
992 | */ | |
a9a2c44f CM |
993 | static int ipmi_thread(void *data) |
994 | { | |
995 | struct smi_info *smi_info = data; | |
e9a705a0 | 996 | unsigned long flags; |
a9a2c44f | 997 | enum si_sm_result smi_result; |
ae74e823 | 998 | struct timespec busy_until; |
a9a2c44f | 999 | |
ae74e823 | 1000 | ipmi_si_set_not_busy(&busy_until); |
a9a2c44f | 1001 | set_user_nice(current, 19); |
e9a705a0 | 1002 | while (!kthread_should_stop()) { |
ae74e823 MW |
1003 | int busy_wait; |
1004 | ||
a9a2c44f | 1005 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 1006 | smi_result = smi_event_handler(smi_info, 0); |
a9a2c44f | 1007 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
ae74e823 MW |
1008 | busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, |
1009 | &busy_until); | |
c305e3d3 CM |
1010 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
1011 | ; /* do nothing */ | |
ae74e823 | 1012 | else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) |
33979734 | 1013 | schedule(); |
3326f4f2 MG |
1014 | else if (smi_result == SI_SM_IDLE) |
1015 | schedule_timeout_interruptible(100); | |
e9a705a0 | 1016 | else |
8d1f66dc | 1017 | schedule_timeout_interruptible(1); |
a9a2c44f | 1018 | } |
a9a2c44f CM |
1019 | return 0; |
1020 | } | |
1021 | ||
1022 | ||
1da177e4 LT |
1023 | static void poll(void *send_info) |
1024 | { | |
1025 | struct smi_info *smi_info = send_info; | |
f60adf42 CM |
1026 | unsigned long flags = 0; |
1027 | int run_to_completion = smi_info->run_to_completion; | |
1da177e4 | 1028 | |
15c62e10 CM |
1029 | /* |
1030 | * Make sure there is some delay in the poll loop so we can | |
1031 | * drive time forward and timeout things. | |
1032 | */ | |
1033 | udelay(10); | |
f60adf42 CM |
1034 | if (!run_to_completion) |
1035 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
15c62e10 | 1036 | smi_event_handler(smi_info, 10); |
f60adf42 CM |
1037 | if (!run_to_completion) |
1038 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | static void request_events(void *send_info) | |
1042 | { | |
1043 | struct smi_info *smi_info = send_info; | |
1044 | ||
40112ae7 CM |
1045 | if (atomic_read(&smi_info->stop_operation) || |
1046 | !smi_info->has_event_buffer) | |
b361e27b CM |
1047 | return; |
1048 | ||
1da177e4 LT |
1049 | atomic_set(&smi_info->req_events, 1); |
1050 | } | |
1051 | ||
0c8204b3 | 1052 | static int initialized; |
1da177e4 | 1053 | |
1da177e4 LT |
1054 | static void smi_timeout(unsigned long data) |
1055 | { | |
1056 | struct smi_info *smi_info = (struct smi_info *) data; | |
1057 | enum si_sm_result smi_result; | |
1058 | unsigned long flags; | |
1059 | unsigned long jiffies_now; | |
c4edff1c | 1060 | long time_diff; |
3326f4f2 | 1061 | long timeout; |
1da177e4 LT |
1062 | #ifdef DEBUG_TIMING |
1063 | struct timeval t; | |
1064 | #endif | |
1065 | ||
1da177e4 LT |
1066 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
1067 | #ifdef DEBUG_TIMING | |
1068 | do_gettimeofday(&t); | |
c305e3d3 | 1069 | printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1070 | #endif |
1071 | jiffies_now = jiffies; | |
c4edff1c | 1072 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
1073 | * SI_USEC_PER_JIFFY); |
1074 | smi_result = smi_event_handler(smi_info, time_diff); | |
1075 | ||
1076 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1077 | ||
1078 | smi_info->last_timeout_jiffies = jiffies_now; | |
1079 | ||
b0defcdb | 1080 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 | 1081 | /* Running with interrupts, only do long timeouts. */ |
3326f4f2 | 1082 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
64959e2d | 1083 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1084 | goto do_mod_timer; |
1da177e4 LT |
1085 | } |
1086 | ||
c305e3d3 CM |
1087 | /* |
1088 | * If the state machine asks for a short delay, then shorten | |
1089 | * the timer timeout. | |
1090 | */ | |
1da177e4 | 1091 | if (smi_result == SI_SM_CALL_WITH_DELAY) { |
64959e2d | 1092 | smi_inc_stat(smi_info, short_timeouts); |
3326f4f2 | 1093 | timeout = jiffies + 1; |
1da177e4 | 1094 | } else { |
64959e2d | 1095 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1096 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1097 | } |
1098 | ||
3326f4f2 MG |
1099 | do_mod_timer: |
1100 | if (smi_result != SI_SM_IDLE) | |
1101 | mod_timer(&(smi_info->si_timer), timeout); | |
1da177e4 LT |
1102 | } |
1103 | ||
7d12e780 | 1104 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
1105 | { |
1106 | struct smi_info *smi_info = data; | |
1107 | unsigned long flags; | |
1108 | #ifdef DEBUG_TIMING | |
1109 | struct timeval t; | |
1110 | #endif | |
1111 | ||
1112 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1113 | ||
64959e2d | 1114 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1115 | |
1da177e4 LT |
1116 | #ifdef DEBUG_TIMING |
1117 | do_gettimeofday(&t); | |
c305e3d3 | 1118 | printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1119 | #endif |
1120 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1121 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1122 | return IRQ_HANDLED; | |
1123 | } | |
1124 | ||
7d12e780 | 1125 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
1126 | { |
1127 | struct smi_info *smi_info = data; | |
1128 | /* We need to clear the IRQ flag for the BT interface. */ | |
1129 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1130 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1131 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 1132 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
1133 | } |
1134 | ||
453823ba CM |
1135 | static int smi_start_processing(void *send_info, |
1136 | ipmi_smi_t intf) | |
1137 | { | |
1138 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1139 | int enable = 0; |
453823ba CM |
1140 | |
1141 | new_smi->intf = intf; | |
1142 | ||
c45adc39 CM |
1143 | /* Try to claim any interrupts. */ |
1144 | if (new_smi->irq_setup) | |
1145 | new_smi->irq_setup(new_smi); | |
1146 | ||
453823ba CM |
1147 | /* Set up the timer that drives the interface. */ |
1148 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
1149 | new_smi->last_timeout_jiffies = jiffies; | |
1150 | mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); | |
1151 | ||
a51f4a81 CM |
1152 | /* |
1153 | * Check if the user forcefully enabled the daemon. | |
1154 | */ | |
1155 | if (new_smi->intf_num < num_force_kipmid) | |
1156 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1157 | /* |
1158 | * The BT interface is efficient enough to not need a thread, | |
1159 | * and there is no need for a thread if we have interrupts. | |
1160 | */ | |
c305e3d3 | 1161 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
a51f4a81 CM |
1162 | enable = 1; |
1163 | ||
1164 | if (enable) { | |
453823ba CM |
1165 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1166 | "kipmi%d", new_smi->intf_num); | |
1167 | if (IS_ERR(new_smi->thread)) { | |
279fbd0c MS |
1168 | dev_notice(new_smi->dev, "Could not start" |
1169 | " kernel thread due to error %ld, only using" | |
1170 | " timers to drive the interface\n", | |
1171 | PTR_ERR(new_smi->thread)); | |
453823ba CM |
1172 | new_smi->thread = NULL; |
1173 | } | |
1174 | } | |
1175 | ||
1176 | return 0; | |
1177 | } | |
9dbf68f9 | 1178 | |
16f4232c ZY |
1179 | static int get_smi_info(void *send_info, struct ipmi_smi_info *data) |
1180 | { | |
1181 | struct smi_info *smi = send_info; | |
1182 | ||
1183 | data->addr_src = smi->addr_source; | |
1184 | data->dev = smi->dev; | |
1185 | data->addr_info = smi->addr_info; | |
1186 | get_device(smi->dev); | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
b9675136 CM |
1191 | static void set_maintenance_mode(void *send_info, int enable) |
1192 | { | |
1193 | struct smi_info *smi_info = send_info; | |
1194 | ||
1195 | if (!enable) | |
1196 | atomic_set(&smi_info->req_events, 0); | |
1197 | } | |
1198 | ||
c305e3d3 | 1199 | static struct ipmi_smi_handlers handlers = { |
1da177e4 | 1200 | .owner = THIS_MODULE, |
453823ba | 1201 | .start_processing = smi_start_processing, |
16f4232c | 1202 | .get_smi_info = get_smi_info, |
1da177e4 LT |
1203 | .sender = sender, |
1204 | .request_events = request_events, | |
b9675136 | 1205 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
1206 | .set_run_to_completion = set_run_to_completion, |
1207 | .poll = poll, | |
1208 | }; | |
1209 | ||
c305e3d3 CM |
1210 | /* |
1211 | * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1212 | * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. | |
1213 | */ | |
1da177e4 | 1214 | |
b0defcdb | 1215 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1216 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1217 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1218 | |
1da177e4 | 1219 | #define DEFAULT_REGSPACING 1 |
dba9b4f6 | 1220 | #define DEFAULT_REGSIZE 1 |
1da177e4 | 1221 | |
d941aeae CM |
1222 | #ifdef CONFIG_ACPI |
1223 | static bool si_tryacpi = 1; | |
1224 | #endif | |
1225 | #ifdef CONFIG_DMI | |
1226 | static bool si_trydmi = 1; | |
1227 | #endif | |
f2afae46 CM |
1228 | static bool si_tryplatform = 1; |
1229 | #ifdef CONFIG_PCI | |
1230 | static bool si_trypci = 1; | |
1231 | #endif | |
90ab5ee9 | 1232 | static bool si_trydefaults = 1; |
1da177e4 LT |
1233 | static char *si_type[SI_MAX_PARMS]; |
1234 | #define MAX_SI_TYPE_STR 30 | |
1235 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1236 | static unsigned long addrs[SI_MAX_PARMS]; | |
64a6f950 | 1237 | static unsigned int num_addrs; |
1da177e4 | 1238 | static unsigned int ports[SI_MAX_PARMS]; |
64a6f950 | 1239 | static unsigned int num_ports; |
1da177e4 | 1240 | static int irqs[SI_MAX_PARMS]; |
64a6f950 | 1241 | static unsigned int num_irqs; |
1da177e4 | 1242 | static int regspacings[SI_MAX_PARMS]; |
64a6f950 | 1243 | static unsigned int num_regspacings; |
1da177e4 | 1244 | static int regsizes[SI_MAX_PARMS]; |
64a6f950 | 1245 | static unsigned int num_regsizes; |
1da177e4 | 1246 | static int regshifts[SI_MAX_PARMS]; |
64a6f950 | 1247 | static unsigned int num_regshifts; |
2f95d513 | 1248 | static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ |
64a6f950 | 1249 | static unsigned int num_slave_addrs; |
1da177e4 | 1250 | |
b361e27b CM |
1251 | #define IPMI_IO_ADDR_SPACE 0 |
1252 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1253 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1254 | |
1255 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1256 | ||
1257 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1258 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1259 | " Documentation/IPMI.txt in the kernel sources for the" | |
1260 | " gory details."); | |
1da177e4 | 1261 | |
d941aeae CM |
1262 | #ifdef CONFIG_ACPI |
1263 | module_param_named(tryacpi, si_tryacpi, bool, 0); | |
1264 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1265 | " default scan of the interfaces identified via ACPI"); | |
1266 | #endif | |
1267 | #ifdef CONFIG_DMI | |
1268 | module_param_named(trydmi, si_trydmi, bool, 0); | |
1269 | MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the" | |
1270 | " default scan of the interfaces identified via DMI"); | |
1271 | #endif | |
f2afae46 CM |
1272 | module_param_named(tryplatform, si_tryplatform, bool, 0); |
1273 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1274 | " default scan of the interfaces identified via platform" | |
1275 | " interfaces like openfirmware"); | |
1276 | #ifdef CONFIG_PCI | |
1277 | module_param_named(trypci, si_trypci, bool, 0); | |
1278 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1279 | " default scan of the interfaces identified via pci"); | |
1280 | #endif | |
1da177e4 LT |
1281 | module_param_named(trydefaults, si_trydefaults, bool, 0); |
1282 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1283 | " default scan of the KCS and SMIC interface at the standard" | |
1284 | " address"); | |
1285 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1286 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1287 | " interface separated by commas. The types are 'kcs'," | |
1288 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1289 | " the first interface to kcs and the second to bt"); | |
64a6f950 | 1290 | module_param_array(addrs, ulong, &num_addrs, 0); |
1da177e4 LT |
1291 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" |
1292 | " addresses separated by commas. Only use if an interface" | |
1293 | " is in memory. Otherwise, set it to zero or leave" | |
1294 | " it blank."); | |
64a6f950 | 1295 | module_param_array(ports, uint, &num_ports, 0); |
1da177e4 LT |
1296 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" |
1297 | " addresses separated by commas. Only use if an interface" | |
1298 | " is a port. Otherwise, set it to zero or leave" | |
1299 | " it blank."); | |
1300 | module_param_array(irqs, int, &num_irqs, 0); | |
1301 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1302 | " addresses separated by commas. Only use if an interface" | |
1303 | " has an interrupt. Otherwise, set it to zero or leave" | |
1304 | " it blank."); | |
1305 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1306 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1307 | " and each successive register used by the interface. For" | |
1308 | " instance, if the start address is 0xca2 and the spacing" | |
1309 | " is 2, then the second address is at 0xca4. Defaults" | |
1310 | " to 1."); | |
1311 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1312 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1313 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1314 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1315 | " the 8-bit IPMI register has to be read from a larger" | |
1316 | " register."); | |
1317 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1318 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1319 | " IPMI register, in bits. For instance, if the data" | |
1320 | " is read from a 32-bit word and the IPMI data is in" | |
1321 | " bit 8-15, then the shift would be 8"); | |
1322 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1323 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1324 | " the controller. Normally this is 0x20, but can be" | |
1325 | " overridden by this parm. This is an array indexed" | |
1326 | " by interface number."); | |
a51f4a81 CM |
1327 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1328 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1329 | " disabled(0). Normally the IPMI driver auto-detects" | |
1330 | " this, but the value may be overridden by this parm."); | |
b361e27b CM |
1331 | module_param(unload_when_empty, int, 0); |
1332 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" | |
1333 | " specified or found, default is 1. Setting to 0" | |
1334 | " is useful for hot add of devices using hotmod."); | |
ae74e823 MW |
1335 | module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); |
1336 | MODULE_PARM_DESC(kipmid_max_busy_us, | |
1337 | "Max time (in microseconds) to busy-wait for IPMI data before" | |
1338 | " sleeping. 0 (default) means to wait forever. Set to 100-500" | |
1339 | " if kipmid is using up a lot of CPU time."); | |
1da177e4 LT |
1340 | |
1341 | ||
b0defcdb | 1342 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1343 | { |
b0defcdb CM |
1344 | if (info->si_type == SI_BT) |
1345 | /* Disable the interrupt in the BT interface. */ | |
1346 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1347 | free_irq(info->irq, info); | |
1da177e4 | 1348 | } |
1da177e4 LT |
1349 | |
1350 | static int std_irq_setup(struct smi_info *info) | |
1351 | { | |
1352 | int rv; | |
1353 | ||
b0defcdb | 1354 | if (!info->irq) |
1da177e4 LT |
1355 | return 0; |
1356 | ||
9dbf68f9 CM |
1357 | if (info->si_type == SI_BT) { |
1358 | rv = request_irq(info->irq, | |
1359 | si_bt_irq_handler, | |
aa5b2bab | 1360 | IRQF_SHARED, |
9dbf68f9 CM |
1361 | DEVICE_NAME, |
1362 | info); | |
b0defcdb | 1363 | if (!rv) |
9dbf68f9 CM |
1364 | /* Enable the interrupt in the BT interface. */ |
1365 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1366 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1367 | } else | |
1368 | rv = request_irq(info->irq, | |
1369 | si_irq_handler, | |
aa5b2bab | 1370 | IRQF_SHARED, |
9dbf68f9 CM |
1371 | DEVICE_NAME, |
1372 | info); | |
1da177e4 | 1373 | if (rv) { |
279fbd0c MS |
1374 | dev_warn(info->dev, "%s unable to claim interrupt %d," |
1375 | " running polled\n", | |
1376 | DEVICE_NAME, info->irq); | |
1da177e4 LT |
1377 | info->irq = 0; |
1378 | } else { | |
b0defcdb | 1379 | info->irq_cleanup = std_irq_cleanup; |
279fbd0c | 1380 | dev_info(info->dev, "Using irq %d\n", info->irq); |
1da177e4 LT |
1381 | } |
1382 | ||
1383 | return rv; | |
1384 | } | |
1385 | ||
1da177e4 LT |
1386 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1387 | { | |
b0defcdb | 1388 | unsigned int addr = io->addr_data; |
1da177e4 | 1389 | |
b0defcdb | 1390 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1391 | } |
1392 | ||
1393 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1394 | unsigned char b) | |
1395 | { | |
b0defcdb | 1396 | unsigned int addr = io->addr_data; |
1da177e4 | 1397 | |
b0defcdb | 1398 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1399 | } |
1400 | ||
1401 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1402 | { | |
b0defcdb | 1403 | unsigned int addr = io->addr_data; |
1da177e4 | 1404 | |
b0defcdb | 1405 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1406 | } |
1407 | ||
1408 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1409 | unsigned char b) | |
1410 | { | |
b0defcdb | 1411 | unsigned int addr = io->addr_data; |
1da177e4 | 1412 | |
b0defcdb | 1413 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1414 | } |
1415 | ||
1416 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1417 | { | |
b0defcdb | 1418 | unsigned int addr = io->addr_data; |
1da177e4 | 1419 | |
b0defcdb | 1420 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1421 | } |
1422 | ||
1423 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1424 | unsigned char b) | |
1425 | { | |
b0defcdb | 1426 | unsigned int addr = io->addr_data; |
1da177e4 | 1427 | |
b0defcdb | 1428 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1429 | } |
1430 | ||
1431 | static void port_cleanup(struct smi_info *info) | |
1432 | { | |
b0defcdb | 1433 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1434 | int idx; |
1da177e4 | 1435 | |
b0defcdb | 1436 | if (addr) { |
c305e3d3 | 1437 | for (idx = 0; idx < info->io_size; idx++) |
d61a3ead CM |
1438 | release_region(addr + idx * info->io.regspacing, |
1439 | info->io.regsize); | |
1da177e4 | 1440 | } |
1da177e4 LT |
1441 | } |
1442 | ||
1443 | static int port_setup(struct smi_info *info) | |
1444 | { | |
b0defcdb | 1445 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1446 | int idx; |
1da177e4 | 1447 | |
b0defcdb | 1448 | if (!addr) |
1da177e4 LT |
1449 | return -ENODEV; |
1450 | ||
1451 | info->io_cleanup = port_cleanup; | |
1452 | ||
c305e3d3 CM |
1453 | /* |
1454 | * Figure out the actual inb/inw/inl/etc routine to use based | |
1455 | * upon the register size. | |
1456 | */ | |
1da177e4 LT |
1457 | switch (info->io.regsize) { |
1458 | case 1: | |
1459 | info->io.inputb = port_inb; | |
1460 | info->io.outputb = port_outb; | |
1461 | break; | |
1462 | case 2: | |
1463 | info->io.inputb = port_inw; | |
1464 | info->io.outputb = port_outw; | |
1465 | break; | |
1466 | case 4: | |
1467 | info->io.inputb = port_inl; | |
1468 | info->io.outputb = port_outl; | |
1469 | break; | |
1470 | default: | |
279fbd0c MS |
1471 | dev_warn(info->dev, "Invalid register size: %d\n", |
1472 | info->io.regsize); | |
1da177e4 LT |
1473 | return -EINVAL; |
1474 | } | |
1475 | ||
c305e3d3 CM |
1476 | /* |
1477 | * Some BIOSes reserve disjoint I/O regions in their ACPI | |
d61a3ead CM |
1478 | * tables. This causes problems when trying to register the |
1479 | * entire I/O region. Therefore we must register each I/O | |
1480 | * port separately. | |
1481 | */ | |
c305e3d3 | 1482 | for (idx = 0; idx < info->io_size; idx++) { |
d61a3ead CM |
1483 | if (request_region(addr + idx * info->io.regspacing, |
1484 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1485 | /* Undo allocations */ | |
1486 | while (idx--) { | |
1487 | release_region(addr + idx * info->io.regspacing, | |
1488 | info->io.regsize); | |
1489 | } | |
1490 | return -EIO; | |
1491 | } | |
1492 | } | |
1da177e4 LT |
1493 | return 0; |
1494 | } | |
1495 | ||
546cfdf4 | 1496 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1497 | { |
1498 | return readb((io->addr)+(offset * io->regspacing)); | |
1499 | } | |
1500 | ||
546cfdf4 | 1501 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1502 | unsigned char b) |
1503 | { | |
1504 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1505 | } | |
1506 | ||
546cfdf4 | 1507 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1508 | { |
1509 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1510 | & 0xff; |
1da177e4 LT |
1511 | } |
1512 | ||
546cfdf4 | 1513 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1514 | unsigned char b) |
1515 | { | |
1516 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1517 | } | |
1518 | ||
546cfdf4 | 1519 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1520 | { |
1521 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1522 | & 0xff; |
1da177e4 LT |
1523 | } |
1524 | ||
546cfdf4 | 1525 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1526 | unsigned char b) |
1527 | { | |
1528 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1529 | } | |
1530 | ||
1531 | #ifdef readq | |
1532 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1533 | { | |
1534 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1535 | & 0xff; |
1da177e4 LT |
1536 | } |
1537 | ||
1538 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1539 | unsigned char b) | |
1540 | { | |
1541 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1542 | } | |
1543 | #endif | |
1544 | ||
1545 | static void mem_cleanup(struct smi_info *info) | |
1546 | { | |
b0defcdb | 1547 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1548 | int mapsize; |
1549 | ||
1550 | if (info->io.addr) { | |
1551 | iounmap(info->io.addr); | |
1552 | ||
1553 | mapsize = ((info->io_size * info->io.regspacing) | |
1554 | - (info->io.regspacing - info->io.regsize)); | |
1555 | ||
b0defcdb | 1556 | release_mem_region(addr, mapsize); |
1da177e4 | 1557 | } |
1da177e4 LT |
1558 | } |
1559 | ||
1560 | static int mem_setup(struct smi_info *info) | |
1561 | { | |
b0defcdb | 1562 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1563 | int mapsize; |
1564 | ||
b0defcdb | 1565 | if (!addr) |
1da177e4 LT |
1566 | return -ENODEV; |
1567 | ||
1568 | info->io_cleanup = mem_cleanup; | |
1569 | ||
c305e3d3 CM |
1570 | /* |
1571 | * Figure out the actual readb/readw/readl/etc routine to use based | |
1572 | * upon the register size. | |
1573 | */ | |
1da177e4 LT |
1574 | switch (info->io.regsize) { |
1575 | case 1: | |
546cfdf4 AD |
1576 | info->io.inputb = intf_mem_inb; |
1577 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1578 | break; |
1579 | case 2: | |
546cfdf4 AD |
1580 | info->io.inputb = intf_mem_inw; |
1581 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1582 | break; |
1583 | case 4: | |
546cfdf4 AD |
1584 | info->io.inputb = intf_mem_inl; |
1585 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1586 | break; |
1587 | #ifdef readq | |
1588 | case 8: | |
1589 | info->io.inputb = mem_inq; | |
1590 | info->io.outputb = mem_outq; | |
1591 | break; | |
1592 | #endif | |
1593 | default: | |
279fbd0c MS |
1594 | dev_warn(info->dev, "Invalid register size: %d\n", |
1595 | info->io.regsize); | |
1da177e4 LT |
1596 | return -EINVAL; |
1597 | } | |
1598 | ||
c305e3d3 CM |
1599 | /* |
1600 | * Calculate the total amount of memory to claim. This is an | |
1da177e4 LT |
1601 | * unusual looking calculation, but it avoids claiming any |
1602 | * more memory than it has to. It will claim everything | |
1603 | * between the first address to the end of the last full | |
c305e3d3 CM |
1604 | * register. |
1605 | */ | |
1da177e4 LT |
1606 | mapsize = ((info->io_size * info->io.regspacing) |
1607 | - (info->io.regspacing - info->io.regsize)); | |
1608 | ||
b0defcdb | 1609 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1610 | return -EIO; |
1611 | ||
b0defcdb | 1612 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1613 | if (info->io.addr == NULL) { |
b0defcdb | 1614 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1615 | return -EIO; |
1616 | } | |
1617 | return 0; | |
1618 | } | |
1619 | ||
b361e27b CM |
1620 | /* |
1621 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1622 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1623 | * Options are: | |
1624 | * rsp=<regspacing> | |
1625 | * rsi=<regsize> | |
1626 | * rsh=<regshift> | |
1627 | * irq=<irq> | |
1628 | * ipmb=<ipmb addr> | |
1629 | */ | |
1630 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1631 | struct hotmod_vals { | |
1632 | char *name; | |
1633 | int val; | |
1634 | }; | |
1635 | static struct hotmod_vals hotmod_ops[] = { | |
1636 | { "add", HM_ADD }, | |
1637 | { "remove", HM_REMOVE }, | |
1638 | { NULL } | |
1639 | }; | |
1640 | static struct hotmod_vals hotmod_si[] = { | |
1641 | { "kcs", SI_KCS }, | |
1642 | { "smic", SI_SMIC }, | |
1643 | { "bt", SI_BT }, | |
1644 | { NULL } | |
1645 | }; | |
1646 | static struct hotmod_vals hotmod_as[] = { | |
1647 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1648 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1649 | { NULL } | |
1650 | }; | |
1d5636cc | 1651 | |
b361e27b CM |
1652 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1653 | { | |
1654 | char *s; | |
1655 | int i; | |
1656 | ||
1657 | s = strchr(*curr, ','); | |
1658 | if (!s) { | |
1659 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1660 | return -EINVAL; | |
1661 | } | |
1662 | *s = '\0'; | |
1663 | s++; | |
1664 | for (i = 0; hotmod_ops[i].name; i++) { | |
1d5636cc | 1665 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1666 | *val = v[i].val; |
1667 | *curr = s; | |
1668 | return 0; | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1673 | return -EINVAL; | |
1674 | } | |
1675 | ||
1d5636cc CM |
1676 | static int check_hotmod_int_op(const char *curr, const char *option, |
1677 | const char *name, int *val) | |
1678 | { | |
1679 | char *n; | |
1680 | ||
1681 | if (strcmp(curr, name) == 0) { | |
1682 | if (!option) { | |
1683 | printk(KERN_WARNING PFX | |
1684 | "No option given for '%s'\n", | |
1685 | curr); | |
1686 | return -EINVAL; | |
1687 | } | |
1688 | *val = simple_strtoul(option, &n, 0); | |
1689 | if ((*n != '\0') || (*option == '\0')) { | |
1690 | printk(KERN_WARNING PFX | |
1691 | "Bad option given for '%s'\n", | |
1692 | curr); | |
1693 | return -EINVAL; | |
1694 | } | |
1695 | return 1; | |
1696 | } | |
1697 | return 0; | |
1698 | } | |
1699 | ||
de5e2ddf ED |
1700 | static struct smi_info *smi_info_alloc(void) |
1701 | { | |
1702 | struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1703 | ||
f60adf42 | 1704 | if (info) |
de5e2ddf | 1705 | spin_lock_init(&info->si_lock); |
de5e2ddf ED |
1706 | return info; |
1707 | } | |
1708 | ||
b361e27b CM |
1709 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1710 | { | |
1711 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1712 | int rv; |
b361e27b CM |
1713 | char *next, *curr, *s, *n, *o; |
1714 | enum hotmod_op op; | |
1715 | enum si_type si_type; | |
1716 | int addr_space; | |
1717 | unsigned long addr; | |
1718 | int regspacing; | |
1719 | int regsize; | |
1720 | int regshift; | |
1721 | int irq; | |
1722 | int ipmb; | |
1723 | int ival; | |
1d5636cc | 1724 | int len; |
b361e27b CM |
1725 | struct smi_info *info; |
1726 | ||
1727 | if (!str) | |
1728 | return -ENOMEM; | |
1729 | ||
1730 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1731 | len = strlen(str); |
1732 | ival = len - 1; | |
b361e27b CM |
1733 | while ((ival >= 0) && isspace(str[ival])) { |
1734 | str[ival] = '\0'; | |
1735 | ival--; | |
1736 | } | |
1737 | ||
1738 | for (curr = str; curr; curr = next) { | |
1739 | regspacing = 1; | |
1740 | regsize = 1; | |
1741 | regshift = 0; | |
1742 | irq = 0; | |
2f95d513 | 1743 | ipmb = 0; /* Choose the default if not specified */ |
b361e27b CM |
1744 | |
1745 | next = strchr(curr, ':'); | |
1746 | if (next) { | |
1747 | *next = '\0'; | |
1748 | next++; | |
1749 | } | |
1750 | ||
1751 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1752 | if (rv) | |
1753 | break; | |
1754 | op = ival; | |
1755 | ||
1756 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1757 | if (rv) | |
1758 | break; | |
1759 | si_type = ival; | |
1760 | ||
1761 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1762 | if (rv) | |
1763 | break; | |
1764 | ||
1765 | s = strchr(curr, ','); | |
1766 | if (s) { | |
1767 | *s = '\0'; | |
1768 | s++; | |
1769 | } | |
1770 | addr = simple_strtoul(curr, &n, 0); | |
1771 | if ((*n != '\0') || (*curr == '\0')) { | |
1772 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1773 | " '%s'\n", curr); | |
1774 | break; | |
1775 | } | |
1776 | ||
1777 | while (s) { | |
1778 | curr = s; | |
1779 | s = strchr(curr, ','); | |
1780 | if (s) { | |
1781 | *s = '\0'; | |
1782 | s++; | |
1783 | } | |
1784 | o = strchr(curr, '='); | |
1785 | if (o) { | |
1786 | *o = '\0'; | |
1787 | o++; | |
1788 | } | |
1d5636cc CM |
1789 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1790 | if (rv < 0) | |
b361e27b | 1791 | goto out; |
1d5636cc CM |
1792 | else if (rv) |
1793 | continue; | |
1794 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1795 | if (rv < 0) | |
1796 | goto out; | |
1797 | else if (rv) | |
1798 | continue; | |
1799 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1800 | if (rv < 0) | |
1801 | goto out; | |
1802 | else if (rv) | |
1803 | continue; | |
1804 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1805 | if (rv < 0) | |
1806 | goto out; | |
1807 | else if (rv) | |
1808 | continue; | |
1809 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1810 | if (rv < 0) | |
1811 | goto out; | |
1812 | else if (rv) | |
1813 | continue; | |
1814 | ||
1815 | rv = -EINVAL; | |
1816 | printk(KERN_WARNING PFX | |
1817 | "Invalid hotmod option '%s'\n", | |
1818 | curr); | |
1819 | goto out; | |
b361e27b CM |
1820 | } |
1821 | ||
1822 | if (op == HM_ADD) { | |
de5e2ddf | 1823 | info = smi_info_alloc(); |
b361e27b CM |
1824 | if (!info) { |
1825 | rv = -ENOMEM; | |
1826 | goto out; | |
1827 | } | |
1828 | ||
5fedc4a2 | 1829 | info->addr_source = SI_HOTMOD; |
b361e27b CM |
1830 | info->si_type = si_type; |
1831 | info->io.addr_data = addr; | |
1832 | info->io.addr_type = addr_space; | |
1833 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1834 | info->io_setup = mem_setup; | |
1835 | else | |
1836 | info->io_setup = port_setup; | |
1837 | ||
1838 | info->io.addr = NULL; | |
1839 | info->io.regspacing = regspacing; | |
1840 | if (!info->io.regspacing) | |
1841 | info->io.regspacing = DEFAULT_REGSPACING; | |
1842 | info->io.regsize = regsize; | |
1843 | if (!info->io.regsize) | |
1844 | info->io.regsize = DEFAULT_REGSPACING; | |
1845 | info->io.regshift = regshift; | |
1846 | info->irq = irq; | |
1847 | if (info->irq) | |
1848 | info->irq_setup = std_irq_setup; | |
1849 | info->slave_addr = ipmb; | |
1850 | ||
d02b3709 CM |
1851 | rv = add_smi(info); |
1852 | if (rv) { | |
7faefea6 | 1853 | kfree(info); |
d02b3709 CM |
1854 | goto out; |
1855 | } | |
1856 | rv = try_smi_init(info); | |
1857 | if (rv) { | |
1858 | cleanup_one_si(info); | |
1859 | goto out; | |
7faefea6 | 1860 | } |
b361e27b CM |
1861 | } else { |
1862 | /* remove */ | |
1863 | struct smi_info *e, *tmp_e; | |
1864 | ||
1865 | mutex_lock(&smi_infos_lock); | |
1866 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1867 | if (e->io.addr_type != addr_space) | |
1868 | continue; | |
1869 | if (e->si_type != si_type) | |
1870 | continue; | |
1871 | if (e->io.addr_data == addr) | |
1872 | cleanup_one_si(e); | |
1873 | } | |
1874 | mutex_unlock(&smi_infos_lock); | |
1875 | } | |
1876 | } | |
1d5636cc | 1877 | rv = len; |
b361e27b CM |
1878 | out: |
1879 | kfree(str); | |
1880 | return rv; | |
1881 | } | |
b0defcdb | 1882 | |
2223cbec | 1883 | static int hardcode_find_bmc(void) |
1da177e4 | 1884 | { |
a1e9c9dd | 1885 | int ret = -ENODEV; |
b0defcdb | 1886 | int i; |
1da177e4 LT |
1887 | struct smi_info *info; |
1888 | ||
b0defcdb CM |
1889 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1890 | if (!ports[i] && !addrs[i]) | |
1891 | continue; | |
1da177e4 | 1892 | |
de5e2ddf | 1893 | info = smi_info_alloc(); |
b0defcdb | 1894 | if (!info) |
a1e9c9dd | 1895 | return -ENOMEM; |
1da177e4 | 1896 | |
5fedc4a2 | 1897 | info->addr_source = SI_HARDCODED; |
279fbd0c | 1898 | printk(KERN_INFO PFX "probing via hardcoded address\n"); |
1da177e4 | 1899 | |
1d5636cc | 1900 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1901 | info->si_type = SI_KCS; |
1d5636cc | 1902 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1903 | info->si_type = SI_SMIC; |
1d5636cc | 1904 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1905 | info->si_type = SI_BT; |
1906 | } else { | |
279fbd0c | 1907 | printk(KERN_WARNING PFX "Interface type specified " |
b0defcdb CM |
1908 | "for interface %d, was invalid: %s\n", |
1909 | i, si_type[i]); | |
1910 | kfree(info); | |
1911 | continue; | |
1912 | } | |
1da177e4 | 1913 | |
b0defcdb CM |
1914 | if (ports[i]) { |
1915 | /* An I/O port */ | |
1916 | info->io_setup = port_setup; | |
1917 | info->io.addr_data = ports[i]; | |
1918 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1919 | } else if (addrs[i]) { | |
1920 | /* A memory port */ | |
1921 | info->io_setup = mem_setup; | |
1922 | info->io.addr_data = addrs[i]; | |
1923 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1924 | } else { | |
279fbd0c MS |
1925 | printk(KERN_WARNING PFX "Interface type specified " |
1926 | "for interface %d, but port and address were " | |
1927 | "not set or set to zero.\n", i); | |
b0defcdb CM |
1928 | kfree(info); |
1929 | continue; | |
1930 | } | |
1da177e4 | 1931 | |
b0defcdb CM |
1932 | info->io.addr = NULL; |
1933 | info->io.regspacing = regspacings[i]; | |
1934 | if (!info->io.regspacing) | |
1935 | info->io.regspacing = DEFAULT_REGSPACING; | |
1936 | info->io.regsize = regsizes[i]; | |
1937 | if (!info->io.regsize) | |
1938 | info->io.regsize = DEFAULT_REGSPACING; | |
1939 | info->io.regshift = regshifts[i]; | |
1940 | info->irq = irqs[i]; | |
1941 | if (info->irq) | |
1942 | info->irq_setup = std_irq_setup; | |
2f95d513 | 1943 | info->slave_addr = slave_addrs[i]; |
1da177e4 | 1944 | |
7faefea6 | 1945 | if (!add_smi(info)) { |
2407d77a MG |
1946 | if (try_smi_init(info)) |
1947 | cleanup_one_si(info); | |
a1e9c9dd | 1948 | ret = 0; |
7faefea6 YL |
1949 | } else { |
1950 | kfree(info); | |
1951 | } | |
b0defcdb | 1952 | } |
a1e9c9dd | 1953 | return ret; |
b0defcdb | 1954 | } |
1da177e4 | 1955 | |
8466361a | 1956 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1957 | |
1958 | #include <linux/acpi.h> | |
1959 | ||
c305e3d3 CM |
1960 | /* |
1961 | * Once we get an ACPI failure, we don't try any more, because we go | |
1962 | * through the tables sequentially. Once we don't find a table, there | |
1963 | * are no more. | |
1964 | */ | |
0c8204b3 | 1965 | static int acpi_failure; |
1da177e4 LT |
1966 | |
1967 | /* For GPE-type interrupts. */ | |
8b6cd8ad LM |
1968 | static u32 ipmi_acpi_gpe(acpi_handle gpe_device, |
1969 | u32 gpe_number, void *context) | |
1da177e4 LT |
1970 | { |
1971 | struct smi_info *smi_info = context; | |
1972 | unsigned long flags; | |
1973 | #ifdef DEBUG_TIMING | |
1974 | struct timeval t; | |
1975 | #endif | |
1976 | ||
1977 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1978 | ||
64959e2d | 1979 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1980 | |
1da177e4 LT |
1981 | #ifdef DEBUG_TIMING |
1982 | do_gettimeofday(&t); | |
1983 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
1984 | #endif | |
1985 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1986 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1987 | ||
1988 | return ACPI_INTERRUPT_HANDLED; | |
1989 | } | |
1990 | ||
b0defcdb CM |
1991 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
1992 | { | |
1993 | if (!info->irq) | |
1994 | return; | |
1995 | ||
1996 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
1997 | } | |
1998 | ||
1da177e4 LT |
1999 | static int acpi_gpe_irq_setup(struct smi_info *info) |
2000 | { | |
2001 | acpi_status status; | |
2002 | ||
b0defcdb | 2003 | if (!info->irq) |
1da177e4 LT |
2004 | return 0; |
2005 | ||
2006 | /* FIXME - is level triggered right? */ | |
2007 | status = acpi_install_gpe_handler(NULL, | |
2008 | info->irq, | |
2009 | ACPI_GPE_LEVEL_TRIGGERED, | |
2010 | &ipmi_acpi_gpe, | |
2011 | info); | |
2012 | if (status != AE_OK) { | |
279fbd0c MS |
2013 | dev_warn(info->dev, "%s unable to claim ACPI GPE %d," |
2014 | " running polled\n", DEVICE_NAME, info->irq); | |
1da177e4 LT |
2015 | info->irq = 0; |
2016 | return -EINVAL; | |
2017 | } else { | |
b0defcdb | 2018 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
279fbd0c | 2019 | dev_info(info->dev, "Using ACPI GPE %d\n", info->irq); |
1da177e4 LT |
2020 | return 0; |
2021 | } | |
2022 | } | |
2023 | ||
1da177e4 LT |
2024 | /* |
2025 | * Defined at | |
631dd1a8 | 2026 | * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf |
1da177e4 LT |
2027 | */ |
2028 | struct SPMITable { | |
2029 | s8 Signature[4]; | |
2030 | u32 Length; | |
2031 | u8 Revision; | |
2032 | u8 Checksum; | |
2033 | s8 OEMID[6]; | |
2034 | s8 OEMTableID[8]; | |
2035 | s8 OEMRevision[4]; | |
2036 | s8 CreatorID[4]; | |
2037 | s8 CreatorRevision[4]; | |
2038 | u8 InterfaceType; | |
2039 | u8 IPMIlegacy; | |
2040 | s16 SpecificationRevision; | |
2041 | ||
2042 | /* | |
2043 | * Bit 0 - SCI interrupt supported | |
2044 | * Bit 1 - I/O APIC/SAPIC | |
2045 | */ | |
2046 | u8 InterruptType; | |
2047 | ||
c305e3d3 CM |
2048 | /* |
2049 | * If bit 0 of InterruptType is set, then this is the SCI | |
2050 | * interrupt in the GPEx_STS register. | |
2051 | */ | |
1da177e4 LT |
2052 | u8 GPE; |
2053 | ||
2054 | s16 Reserved; | |
2055 | ||
c305e3d3 CM |
2056 | /* |
2057 | * If bit 1 of InterruptType is set, then this is the I/O | |
2058 | * APIC/SAPIC interrupt. | |
2059 | */ | |
1da177e4 LT |
2060 | u32 GlobalSystemInterrupt; |
2061 | ||
2062 | /* The actual register address. */ | |
2063 | struct acpi_generic_address addr; | |
2064 | ||
2065 | u8 UID[4]; | |
2066 | ||
2067 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
2068 | }; | |
2069 | ||
2223cbec | 2070 | static int try_init_spmi(struct SPMITable *spmi) |
1da177e4 LT |
2071 | { |
2072 | struct smi_info *info; | |
d02b3709 | 2073 | int rv; |
1da177e4 | 2074 | |
1da177e4 | 2075 | if (spmi->IPMIlegacy != 1) { |
279fbd0c MS |
2076 | printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy); |
2077 | return -ENODEV; | |
1da177e4 LT |
2078 | } |
2079 | ||
de5e2ddf | 2080 | info = smi_info_alloc(); |
b0defcdb | 2081 | if (!info) { |
279fbd0c | 2082 | printk(KERN_ERR PFX "Could not allocate SI data (3)\n"); |
b0defcdb CM |
2083 | return -ENOMEM; |
2084 | } | |
2085 | ||
5fedc4a2 | 2086 | info->addr_source = SI_SPMI; |
279fbd0c | 2087 | printk(KERN_INFO PFX "probing via SPMI\n"); |
1da177e4 | 2088 | |
1da177e4 | 2089 | /* Figure out the interface type. */ |
c305e3d3 | 2090 | switch (spmi->InterfaceType) { |
1da177e4 | 2091 | case 1: /* KCS */ |
b0defcdb | 2092 | info->si_type = SI_KCS; |
1da177e4 | 2093 | break; |
1da177e4 | 2094 | case 2: /* SMIC */ |
b0defcdb | 2095 | info->si_type = SI_SMIC; |
1da177e4 | 2096 | break; |
1da177e4 | 2097 | case 3: /* BT */ |
b0defcdb | 2098 | info->si_type = SI_BT; |
1da177e4 | 2099 | break; |
1da177e4 | 2100 | default: |
279fbd0c MS |
2101 | printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n", |
2102 | spmi->InterfaceType); | |
b0defcdb | 2103 | kfree(info); |
1da177e4 LT |
2104 | return -EIO; |
2105 | } | |
2106 | ||
1da177e4 LT |
2107 | if (spmi->InterruptType & 1) { |
2108 | /* We've got a GPE interrupt. */ | |
2109 | info->irq = spmi->GPE; | |
2110 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
2111 | } else if (spmi->InterruptType & 2) { |
2112 | /* We've got an APIC/SAPIC interrupt. */ | |
2113 | info->irq = spmi->GlobalSystemInterrupt; | |
2114 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
2115 | } else { |
2116 | /* Use the default interrupt setting. */ | |
2117 | info->irq = 0; | |
2118 | info->irq_setup = NULL; | |
2119 | } | |
2120 | ||
15a58ed1 | 2121 | if (spmi->addr.bit_width) { |
35bc37a0 | 2122 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 2123 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 2124 | } else { |
35bc37a0 CM |
2125 | info->io.regspacing = DEFAULT_REGSPACING; |
2126 | } | |
b0defcdb | 2127 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 2128 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 2129 | |
15a58ed1 | 2130 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 2131 | info->io_setup = mem_setup; |
8fe1425a | 2132 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
15a58ed1 | 2133 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 2134 | info->io_setup = port_setup; |
8fe1425a | 2135 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
2136 | } else { |
2137 | kfree(info); | |
279fbd0c | 2138 | printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n"); |
1da177e4 LT |
2139 | return -EIO; |
2140 | } | |
b0defcdb | 2141 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 2142 | |
7bb671e3 YL |
2143 | pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n", |
2144 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2145 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2146 | info->irq); | |
2147 | ||
d02b3709 CM |
2148 | rv = add_smi(info); |
2149 | if (rv) | |
7faefea6 | 2150 | kfree(info); |
1da177e4 | 2151 | |
d02b3709 | 2152 | return rv; |
1da177e4 | 2153 | } |
b0defcdb | 2154 | |
2223cbec | 2155 | static void spmi_find_bmc(void) |
b0defcdb CM |
2156 | { |
2157 | acpi_status status; | |
2158 | struct SPMITable *spmi; | |
2159 | int i; | |
2160 | ||
2161 | if (acpi_disabled) | |
2162 | return; | |
2163 | ||
2164 | if (acpi_failure) | |
2165 | return; | |
2166 | ||
2167 | for (i = 0; ; i++) { | |
15a58ed1 AS |
2168 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
2169 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
2170 | if (status != AE_OK) |
2171 | return; | |
2172 | ||
18a3e0bf | 2173 | try_init_spmi(spmi); |
b0defcdb CM |
2174 | } |
2175 | } | |
9e368fa0 | 2176 | |
2223cbec | 2177 | static int ipmi_pnp_probe(struct pnp_dev *dev, |
9e368fa0 BH |
2178 | const struct pnp_device_id *dev_id) |
2179 | { | |
2180 | struct acpi_device *acpi_dev; | |
2181 | struct smi_info *info; | |
a9e31765 | 2182 | struct resource *res, *res_second; |
9e368fa0 BH |
2183 | acpi_handle handle; |
2184 | acpi_status status; | |
2185 | unsigned long long tmp; | |
d02b3709 | 2186 | int rv; |
9e368fa0 BH |
2187 | |
2188 | acpi_dev = pnp_acpi_device(dev); | |
2189 | if (!acpi_dev) | |
2190 | return -ENODEV; | |
2191 | ||
de5e2ddf | 2192 | info = smi_info_alloc(); |
9e368fa0 BH |
2193 | if (!info) |
2194 | return -ENOMEM; | |
2195 | ||
5fedc4a2 | 2196 | info->addr_source = SI_ACPI; |
279fbd0c | 2197 | printk(KERN_INFO PFX "probing via ACPI\n"); |
9e368fa0 BH |
2198 | |
2199 | handle = acpi_dev->handle; | |
16f4232c | 2200 | info->addr_info.acpi_info.acpi_handle = handle; |
9e368fa0 BH |
2201 | |
2202 | /* _IFT tells us the interface type: KCS, BT, etc */ | |
2203 | status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp); | |
2204 | if (ACPI_FAILURE(status)) | |
2205 | goto err_free; | |
2206 | ||
2207 | switch (tmp) { | |
2208 | case 1: | |
2209 | info->si_type = SI_KCS; | |
2210 | break; | |
2211 | case 2: | |
2212 | info->si_type = SI_SMIC; | |
2213 | break; | |
2214 | case 3: | |
2215 | info->si_type = SI_BT; | |
2216 | break; | |
2217 | default: | |
279fbd0c | 2218 | dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp); |
9e368fa0 BH |
2219 | goto err_free; |
2220 | } | |
2221 | ||
279fbd0c MS |
2222 | res = pnp_get_resource(dev, IORESOURCE_IO, 0); |
2223 | if (res) { | |
9e368fa0 BH |
2224 | info->io_setup = port_setup; |
2225 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
9e368fa0 | 2226 | } else { |
279fbd0c MS |
2227 | res = pnp_get_resource(dev, IORESOURCE_MEM, 0); |
2228 | if (res) { | |
2229 | info->io_setup = mem_setup; | |
2230 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2231 | } | |
2232 | } | |
2233 | if (!res) { | |
9e368fa0 BH |
2234 | dev_err(&dev->dev, "no I/O or memory address\n"); |
2235 | goto err_free; | |
2236 | } | |
279fbd0c | 2237 | info->io.addr_data = res->start; |
9e368fa0 BH |
2238 | |
2239 | info->io.regspacing = DEFAULT_REGSPACING; | |
a9e31765 | 2240 | res_second = pnp_get_resource(dev, |
d9e1b6c4 YL |
2241 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? |
2242 | IORESOURCE_IO : IORESOURCE_MEM, | |
2243 | 1); | |
a9e31765 YL |
2244 | if (res_second) { |
2245 | if (res_second->start > info->io.addr_data) | |
2246 | info->io.regspacing = res_second->start - info->io.addr_data; | |
d9e1b6c4 | 2247 | } |
9e368fa0 BH |
2248 | info->io.regsize = DEFAULT_REGSPACING; |
2249 | info->io.regshift = 0; | |
2250 | ||
2251 | /* If _GPE exists, use it; otherwise use standard interrupts */ | |
2252 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); | |
2253 | if (ACPI_SUCCESS(status)) { | |
2254 | info->irq = tmp; | |
2255 | info->irq_setup = acpi_gpe_irq_setup; | |
2256 | } else if (pnp_irq_valid(dev, 0)) { | |
2257 | info->irq = pnp_irq(dev, 0); | |
2258 | info->irq_setup = std_irq_setup; | |
2259 | } | |
2260 | ||
8c8eae27 | 2261 | info->dev = &dev->dev; |
9e368fa0 BH |
2262 | pnp_set_drvdata(dev, info); |
2263 | ||
279fbd0c MS |
2264 | dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n", |
2265 | res, info->io.regsize, info->io.regspacing, | |
2266 | info->irq); | |
2267 | ||
d02b3709 CM |
2268 | rv = add_smi(info); |
2269 | if (rv) | |
2270 | kfree(info); | |
7faefea6 | 2271 | |
d02b3709 | 2272 | return rv; |
9e368fa0 BH |
2273 | |
2274 | err_free: | |
2275 | kfree(info); | |
2276 | return -EINVAL; | |
2277 | } | |
2278 | ||
39af33fc | 2279 | static void ipmi_pnp_remove(struct pnp_dev *dev) |
9e368fa0 BH |
2280 | { |
2281 | struct smi_info *info = pnp_get_drvdata(dev); | |
2282 | ||
2283 | cleanup_one_si(info); | |
2284 | } | |
2285 | ||
2286 | static const struct pnp_device_id pnp_dev_table[] = { | |
2287 | {"IPI0001", 0}, | |
2288 | {"", 0}, | |
2289 | }; | |
2290 | ||
2291 | static struct pnp_driver ipmi_pnp_driver = { | |
2292 | .name = DEVICE_NAME, | |
2293 | .probe = ipmi_pnp_probe, | |
bcd2982a | 2294 | .remove = ipmi_pnp_remove, |
9e368fa0 BH |
2295 | .id_table = pnp_dev_table, |
2296 | }; | |
a798e2d2 JD |
2297 | |
2298 | MODULE_DEVICE_TABLE(pnp, pnp_dev_table); | |
1da177e4 LT |
2299 | #endif |
2300 | ||
a9fad4cc | 2301 | #ifdef CONFIG_DMI |
c305e3d3 | 2302 | struct dmi_ipmi_data { |
1da177e4 LT |
2303 | u8 type; |
2304 | u8 addr_space; | |
2305 | unsigned long base_addr; | |
2306 | u8 irq; | |
2307 | u8 offset; | |
2308 | u8 slave_addr; | |
b0defcdb | 2309 | }; |
1da177e4 | 2310 | |
2223cbec | 2311 | static int decode_dmi(const struct dmi_header *dm, |
b0defcdb | 2312 | struct dmi_ipmi_data *dmi) |
1da177e4 | 2313 | { |
1855256c | 2314 | const u8 *data = (const u8 *)dm; |
1da177e4 LT |
2315 | unsigned long base_addr; |
2316 | u8 reg_spacing; | |
b224cd3a | 2317 | u8 len = dm->length; |
1da177e4 | 2318 | |
b0defcdb | 2319 | dmi->type = data[4]; |
1da177e4 LT |
2320 | |
2321 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
2322 | if (len >= 0x11) { | |
2323 | if (base_addr & 1) { | |
2324 | /* I/O */ | |
2325 | base_addr &= 0xFFFE; | |
b0defcdb | 2326 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
c305e3d3 | 2327 | } else |
1da177e4 | 2328 | /* Memory */ |
b0defcdb | 2329 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
c305e3d3 | 2330 | |
1da177e4 LT |
2331 | /* If bit 4 of byte 0x10 is set, then the lsb for the address |
2332 | is odd. */ | |
b0defcdb | 2333 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 2334 | |
b0defcdb | 2335 | dmi->irq = data[0x11]; |
1da177e4 LT |
2336 | |
2337 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 2338 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
c305e3d3 | 2339 | switch (reg_spacing) { |
1da177e4 | 2340 | case 0x00: /* Byte boundaries */ |
b0defcdb | 2341 | dmi->offset = 1; |
1da177e4 LT |
2342 | break; |
2343 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 2344 | dmi->offset = 4; |
1da177e4 LT |
2345 | break; |
2346 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 2347 | dmi->offset = 16; |
1da177e4 LT |
2348 | break; |
2349 | default: | |
2350 | /* Some other interface, just ignore it. */ | |
2351 | return -EIO; | |
2352 | } | |
2353 | } else { | |
2354 | /* Old DMI spec. */ | |
c305e3d3 CM |
2355 | /* |
2356 | * Note that technically, the lower bit of the base | |
92068801 CM |
2357 | * address should be 1 if the address is I/O and 0 if |
2358 | * the address is in memory. So many systems get that | |
2359 | * wrong (and all that I have seen are I/O) so we just | |
2360 | * ignore that bit and assume I/O. Systems that use | |
c305e3d3 CM |
2361 | * memory should use the newer spec, anyway. |
2362 | */ | |
b0defcdb CM |
2363 | dmi->base_addr = base_addr & 0xfffe; |
2364 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
2365 | dmi->offset = 1; | |
1da177e4 LT |
2366 | } |
2367 | ||
b0defcdb | 2368 | dmi->slave_addr = data[6]; |
1da177e4 | 2369 | |
b0defcdb | 2370 | return 0; |
1da177e4 LT |
2371 | } |
2372 | ||
2223cbec | 2373 | static void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 2374 | { |
b0defcdb | 2375 | struct smi_info *info; |
1da177e4 | 2376 | |
de5e2ddf | 2377 | info = smi_info_alloc(); |
b0defcdb | 2378 | if (!info) { |
279fbd0c | 2379 | printk(KERN_ERR PFX "Could not allocate SI data\n"); |
b0defcdb | 2380 | return; |
1da177e4 | 2381 | } |
1da177e4 | 2382 | |
5fedc4a2 | 2383 | info->addr_source = SI_SMBIOS; |
279fbd0c | 2384 | printk(KERN_INFO PFX "probing via SMBIOS\n"); |
1da177e4 | 2385 | |
e8b33617 | 2386 | switch (ipmi_data->type) { |
b0defcdb CM |
2387 | case 0x01: /* KCS */ |
2388 | info->si_type = SI_KCS; | |
2389 | break; | |
2390 | case 0x02: /* SMIC */ | |
2391 | info->si_type = SI_SMIC; | |
2392 | break; | |
2393 | case 0x03: /* BT */ | |
2394 | info->si_type = SI_BT; | |
2395 | break; | |
2396 | default: | |
80cd6920 | 2397 | kfree(info); |
b0defcdb | 2398 | return; |
1da177e4 | 2399 | } |
1da177e4 | 2400 | |
b0defcdb CM |
2401 | switch (ipmi_data->addr_space) { |
2402 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2403 | info->io_setup = mem_setup; |
b0defcdb CM |
2404 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2405 | break; | |
2406 | ||
2407 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2408 | info->io_setup = port_setup; |
b0defcdb CM |
2409 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2410 | break; | |
2411 | ||
2412 | default: | |
1da177e4 | 2413 | kfree(info); |
279fbd0c | 2414 | printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n", |
b0defcdb CM |
2415 | ipmi_data->addr_space); |
2416 | return; | |
1da177e4 | 2417 | } |
b0defcdb | 2418 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2419 | |
b0defcdb CM |
2420 | info->io.regspacing = ipmi_data->offset; |
2421 | if (!info->io.regspacing) | |
1da177e4 LT |
2422 | info->io.regspacing = DEFAULT_REGSPACING; |
2423 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2424 | info->io.regshift = 0; |
1da177e4 LT |
2425 | |
2426 | info->slave_addr = ipmi_data->slave_addr; | |
2427 | ||
b0defcdb CM |
2428 | info->irq = ipmi_data->irq; |
2429 | if (info->irq) | |
2430 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2431 | |
7bb671e3 YL |
2432 | pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n", |
2433 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2434 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2435 | info->irq); | |
2436 | ||
7faefea6 YL |
2437 | if (add_smi(info)) |
2438 | kfree(info); | |
b0defcdb | 2439 | } |
1da177e4 | 2440 | |
2223cbec | 2441 | static void dmi_find_bmc(void) |
b0defcdb | 2442 | { |
1855256c | 2443 | const struct dmi_device *dev = NULL; |
b0defcdb CM |
2444 | struct dmi_ipmi_data data; |
2445 | int rv; | |
2446 | ||
2447 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2448 | memset(&data, 0, sizeof(data)); |
1855256c JG |
2449 | rv = decode_dmi((const struct dmi_header *) dev->device_data, |
2450 | &data); | |
b0defcdb CM |
2451 | if (!rv) |
2452 | try_init_dmi(&data); | |
2453 | } | |
1da177e4 | 2454 | } |
a9fad4cc | 2455 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2456 | |
2457 | #ifdef CONFIG_PCI | |
2458 | ||
b0defcdb CM |
2459 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2460 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2461 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2462 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2463 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2464 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2465 | ||
1da177e4 LT |
2466 | #define PCI_HP_VENDOR_ID 0x103C |
2467 | #define PCI_MMC_DEVICE_ID 0x121A | |
2468 | #define PCI_MMC_ADDR_CW 0x10 | |
2469 | ||
b0defcdb CM |
2470 | static void ipmi_pci_cleanup(struct smi_info *info) |
2471 | { | |
2472 | struct pci_dev *pdev = info->addr_source_data; | |
2473 | ||
2474 | pci_disable_device(pdev); | |
2475 | } | |
1da177e4 | 2476 | |
2223cbec | 2477 | static int ipmi_pci_probe_regspacing(struct smi_info *info) |
a6c16c28 CM |
2478 | { |
2479 | if (info->si_type == SI_KCS) { | |
2480 | unsigned char status; | |
2481 | int regspacing; | |
2482 | ||
2483 | info->io.regsize = DEFAULT_REGSIZE; | |
2484 | info->io.regshift = 0; | |
2485 | info->io_size = 2; | |
2486 | info->handlers = &kcs_smi_handlers; | |
2487 | ||
2488 | /* detect 1, 4, 16byte spacing */ | |
2489 | for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) { | |
2490 | info->io.regspacing = regspacing; | |
2491 | if (info->io_setup(info)) { | |
2492 | dev_err(info->dev, | |
2493 | "Could not setup I/O space\n"); | |
2494 | return DEFAULT_REGSPACING; | |
2495 | } | |
2496 | /* write invalid cmd */ | |
2497 | info->io.outputb(&info->io, 1, 0x10); | |
2498 | /* read status back */ | |
2499 | status = info->io.inputb(&info->io, 1); | |
2500 | info->io_cleanup(info); | |
2501 | if (status) | |
2502 | return regspacing; | |
2503 | regspacing *= 4; | |
2504 | } | |
2505 | } | |
2506 | return DEFAULT_REGSPACING; | |
2507 | } | |
2508 | ||
2223cbec | 2509 | static int ipmi_pci_probe(struct pci_dev *pdev, |
b0defcdb | 2510 | const struct pci_device_id *ent) |
1da177e4 | 2511 | { |
b0defcdb CM |
2512 | int rv; |
2513 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2514 | struct smi_info *info; | |
1da177e4 | 2515 | |
de5e2ddf | 2516 | info = smi_info_alloc(); |
b0defcdb | 2517 | if (!info) |
1cd441f9 | 2518 | return -ENOMEM; |
1da177e4 | 2519 | |
5fedc4a2 | 2520 | info->addr_source = SI_PCI; |
279fbd0c | 2521 | dev_info(&pdev->dev, "probing via PCI"); |
1da177e4 | 2522 | |
b0defcdb CM |
2523 | switch (class_type) { |
2524 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2525 | info->si_type = SI_SMIC; | |
2526 | break; | |
1da177e4 | 2527 | |
b0defcdb CM |
2528 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2529 | info->si_type = SI_KCS; | |
2530 | break; | |
2531 | ||
2532 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2533 | info->si_type = SI_BT; | |
2534 | break; | |
2535 | ||
2536 | default: | |
2537 | kfree(info); | |
279fbd0c | 2538 | dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type); |
1cd441f9 | 2539 | return -ENOMEM; |
1da177e4 LT |
2540 | } |
2541 | ||
b0defcdb CM |
2542 | rv = pci_enable_device(pdev); |
2543 | if (rv) { | |
279fbd0c | 2544 | dev_err(&pdev->dev, "couldn't enable PCI device\n"); |
b0defcdb CM |
2545 | kfree(info); |
2546 | return rv; | |
1da177e4 LT |
2547 | } |
2548 | ||
b0defcdb CM |
2549 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2550 | info->addr_source_data = pdev; | |
1da177e4 | 2551 | |
b0defcdb CM |
2552 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2553 | info->io_setup = port_setup; | |
2554 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2555 | } else { | |
2556 | info->io_setup = mem_setup; | |
2557 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2558 | } |
b0defcdb | 2559 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2560 | |
a6c16c28 CM |
2561 | info->io.regspacing = ipmi_pci_probe_regspacing(info); |
2562 | info->io.regsize = DEFAULT_REGSIZE; | |
b0defcdb | 2563 | info->io.regshift = 0; |
1da177e4 | 2564 | |
b0defcdb CM |
2565 | info->irq = pdev->irq; |
2566 | if (info->irq) | |
2567 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2568 | |
50c812b2 | 2569 | info->dev = &pdev->dev; |
fca3b747 | 2570 | pci_set_drvdata(pdev, info); |
50c812b2 | 2571 | |
279fbd0c MS |
2572 | dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n", |
2573 | &pdev->resource[0], info->io.regsize, info->io.regspacing, | |
2574 | info->irq); | |
2575 | ||
d02b3709 CM |
2576 | rv = add_smi(info); |
2577 | if (rv) { | |
7faefea6 | 2578 | kfree(info); |
d02b3709 CM |
2579 | pci_disable_device(pdev); |
2580 | } | |
7faefea6 | 2581 | |
d02b3709 | 2582 | return rv; |
b0defcdb | 2583 | } |
1da177e4 | 2584 | |
39af33fc | 2585 | static void ipmi_pci_remove(struct pci_dev *pdev) |
b0defcdb | 2586 | { |
fca3b747 CM |
2587 | struct smi_info *info = pci_get_drvdata(pdev); |
2588 | cleanup_one_si(info); | |
d02b3709 | 2589 | pci_disable_device(pdev); |
b0defcdb | 2590 | } |
1da177e4 | 2591 | |
b0defcdb CM |
2592 | static struct pci_device_id ipmi_pci_devices[] = { |
2593 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
248bdd5e KC |
2594 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, |
2595 | { 0, } | |
b0defcdb CM |
2596 | }; |
2597 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2598 | ||
2599 | static struct pci_driver ipmi_pci_driver = { | |
c305e3d3 CM |
2600 | .name = DEVICE_NAME, |
2601 | .id_table = ipmi_pci_devices, | |
2602 | .probe = ipmi_pci_probe, | |
bcd2982a | 2603 | .remove = ipmi_pci_remove, |
b0defcdb CM |
2604 | }; |
2605 | #endif /* CONFIG_PCI */ | |
1da177e4 | 2606 | |
b1608d69 | 2607 | static struct of_device_id ipmi_match[]; |
2223cbec | 2608 | static int ipmi_probe(struct platform_device *dev) |
dba9b4f6 | 2609 | { |
a1e9c9dd | 2610 | #ifdef CONFIG_OF |
b1608d69 | 2611 | const struct of_device_id *match; |
dba9b4f6 CM |
2612 | struct smi_info *info; |
2613 | struct resource resource; | |
da81c3b9 | 2614 | const __be32 *regsize, *regspacing, *regshift; |
61c7a080 | 2615 | struct device_node *np = dev->dev.of_node; |
dba9b4f6 CM |
2616 | int ret; |
2617 | int proplen; | |
2618 | ||
279fbd0c | 2619 | dev_info(&dev->dev, "probing via device tree\n"); |
dba9b4f6 | 2620 | |
b1608d69 GL |
2621 | match = of_match_device(ipmi_match, &dev->dev); |
2622 | if (!match) | |
a1e9c9dd RH |
2623 | return -EINVAL; |
2624 | ||
dba9b4f6 CM |
2625 | ret = of_address_to_resource(np, 0, &resource); |
2626 | if (ret) { | |
2627 | dev_warn(&dev->dev, PFX "invalid address from OF\n"); | |
2628 | return ret; | |
2629 | } | |
2630 | ||
9c25099d | 2631 | regsize = of_get_property(np, "reg-size", &proplen); |
dba9b4f6 CM |
2632 | if (regsize && proplen != 4) { |
2633 | dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); | |
2634 | return -EINVAL; | |
2635 | } | |
2636 | ||
9c25099d | 2637 | regspacing = of_get_property(np, "reg-spacing", &proplen); |
dba9b4f6 CM |
2638 | if (regspacing && proplen != 4) { |
2639 | dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); | |
2640 | return -EINVAL; | |
2641 | } | |
2642 | ||
9c25099d | 2643 | regshift = of_get_property(np, "reg-shift", &proplen); |
dba9b4f6 CM |
2644 | if (regshift && proplen != 4) { |
2645 | dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); | |
2646 | return -EINVAL; | |
2647 | } | |
2648 | ||
de5e2ddf | 2649 | info = smi_info_alloc(); |
dba9b4f6 CM |
2650 | |
2651 | if (!info) { | |
2652 | dev_err(&dev->dev, | |
279fbd0c | 2653 | "could not allocate memory for OF probe\n"); |
dba9b4f6 CM |
2654 | return -ENOMEM; |
2655 | } | |
2656 | ||
b1608d69 | 2657 | info->si_type = (enum si_type) match->data; |
5fedc4a2 | 2658 | info->addr_source = SI_DEVICETREE; |
dba9b4f6 CM |
2659 | info->irq_setup = std_irq_setup; |
2660 | ||
3b7ec117 NC |
2661 | if (resource.flags & IORESOURCE_IO) { |
2662 | info->io_setup = port_setup; | |
2663 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2664 | } else { | |
2665 | info->io_setup = mem_setup; | |
2666 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2667 | } | |
2668 | ||
dba9b4f6 CM |
2669 | info->io.addr_data = resource.start; |
2670 | ||
da81c3b9 RH |
2671 | info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE; |
2672 | info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING; | |
2673 | info->io.regshift = regshift ? be32_to_cpup(regshift) : 0; | |
dba9b4f6 | 2674 | |
61c7a080 | 2675 | info->irq = irq_of_parse_and_map(dev->dev.of_node, 0); |
dba9b4f6 CM |
2676 | info->dev = &dev->dev; |
2677 | ||
279fbd0c | 2678 | dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n", |
dba9b4f6 CM |
2679 | info->io.addr_data, info->io.regsize, info->io.regspacing, |
2680 | info->irq); | |
2681 | ||
9de33df4 | 2682 | dev_set_drvdata(&dev->dev, info); |
dba9b4f6 | 2683 | |
d02b3709 CM |
2684 | ret = add_smi(info); |
2685 | if (ret) { | |
7faefea6 | 2686 | kfree(info); |
d02b3709 | 2687 | return ret; |
7faefea6 | 2688 | } |
a1e9c9dd | 2689 | #endif |
7faefea6 | 2690 | return 0; |
dba9b4f6 CM |
2691 | } |
2692 | ||
39af33fc | 2693 | static int ipmi_remove(struct platform_device *dev) |
dba9b4f6 | 2694 | { |
a1e9c9dd | 2695 | #ifdef CONFIG_OF |
9de33df4 | 2696 | cleanup_one_si(dev_get_drvdata(&dev->dev)); |
a1e9c9dd | 2697 | #endif |
dba9b4f6 CM |
2698 | return 0; |
2699 | } | |
2700 | ||
2701 | static struct of_device_id ipmi_match[] = | |
2702 | { | |
c305e3d3 CM |
2703 | { .type = "ipmi", .compatible = "ipmi-kcs", |
2704 | .data = (void *)(unsigned long) SI_KCS }, | |
2705 | { .type = "ipmi", .compatible = "ipmi-smic", | |
2706 | .data = (void *)(unsigned long) SI_SMIC }, | |
2707 | { .type = "ipmi", .compatible = "ipmi-bt", | |
2708 | .data = (void *)(unsigned long) SI_BT }, | |
dba9b4f6 CM |
2709 | {}, |
2710 | }; | |
2711 | ||
a1e9c9dd | 2712 | static struct platform_driver ipmi_driver = { |
4018294b | 2713 | .driver = { |
a1e9c9dd | 2714 | .name = DEVICE_NAME, |
4018294b GL |
2715 | .owner = THIS_MODULE, |
2716 | .of_match_table = ipmi_match, | |
2717 | }, | |
a1e9c9dd | 2718 | .probe = ipmi_probe, |
bcd2982a | 2719 | .remove = ipmi_remove, |
dba9b4f6 | 2720 | }; |
dba9b4f6 | 2721 | |
fdbeb7de TB |
2722 | #ifdef CONFIG_PARISC |
2723 | static int ipmi_parisc_probe(struct parisc_device *dev) | |
2724 | { | |
2725 | struct smi_info *info; | |
dfa19426 | 2726 | int rv; |
fdbeb7de TB |
2727 | |
2728 | info = smi_info_alloc(); | |
2729 | ||
2730 | if (!info) { | |
2731 | dev_err(&dev->dev, | |
2732 | "could not allocate memory for PARISC probe\n"); | |
2733 | return -ENOMEM; | |
2734 | } | |
2735 | ||
2736 | info->si_type = SI_KCS; | |
2737 | info->addr_source = SI_DEVICETREE; | |
2738 | info->io_setup = mem_setup; | |
2739 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2740 | info->io.addr_data = dev->hpa.start; | |
2741 | info->io.regsize = 1; | |
2742 | info->io.regspacing = 1; | |
2743 | info->io.regshift = 0; | |
2744 | info->irq = 0; /* no interrupt */ | |
2745 | info->irq_setup = NULL; | |
2746 | info->dev = &dev->dev; | |
2747 | ||
2748 | dev_dbg(&dev->dev, "addr 0x%lx\n", info->io.addr_data); | |
2749 | ||
2750 | dev_set_drvdata(&dev->dev, info); | |
2751 | ||
d02b3709 CM |
2752 | rv = add_smi(info); |
2753 | if (rv) { | |
fdbeb7de | 2754 | kfree(info); |
d02b3709 | 2755 | return rv; |
fdbeb7de TB |
2756 | } |
2757 | ||
2758 | return 0; | |
2759 | } | |
2760 | ||
2761 | static int ipmi_parisc_remove(struct parisc_device *dev) | |
2762 | { | |
2763 | cleanup_one_si(dev_get_drvdata(&dev->dev)); | |
2764 | return 0; | |
2765 | } | |
2766 | ||
2767 | static struct parisc_device_id ipmi_parisc_tbl[] = { | |
2768 | { HPHW_MC, HVERSION_REV_ANY_ID, 0x004, 0xC0 }, | |
2769 | { 0, } | |
2770 | }; | |
2771 | ||
2772 | static struct parisc_driver ipmi_parisc_driver = { | |
2773 | .name = "ipmi", | |
2774 | .id_table = ipmi_parisc_tbl, | |
2775 | .probe = ipmi_parisc_probe, | |
2776 | .remove = ipmi_parisc_remove, | |
2777 | }; | |
2778 | #endif /* CONFIG_PARISC */ | |
2779 | ||
40112ae7 | 2780 | static int wait_for_msg_done(struct smi_info *smi_info) |
1da177e4 | 2781 | { |
50c812b2 | 2782 | enum si_sm_result smi_result; |
1da177e4 LT |
2783 | |
2784 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 2785 | for (;;) { |
c3e7e791 CM |
2786 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2787 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2788 | schedule_timeout_uninterruptible(1); |
1da177e4 | 2789 | smi_result = smi_info->handlers->event( |
e21404dc | 2790 | smi_info->si_sm, jiffies_to_usecs(1)); |
c305e3d3 | 2791 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
2792 | smi_result = smi_info->handlers->event( |
2793 | smi_info->si_sm, 0); | |
c305e3d3 | 2794 | } else |
1da177e4 LT |
2795 | break; |
2796 | } | |
40112ae7 | 2797 | if (smi_result == SI_SM_HOSED) |
c305e3d3 CM |
2798 | /* |
2799 | * We couldn't get the state machine to run, so whatever's at | |
2800 | * the port is probably not an IPMI SMI interface. | |
2801 | */ | |
40112ae7 CM |
2802 | return -ENODEV; |
2803 | ||
2804 | return 0; | |
2805 | } | |
2806 | ||
2807 | static int try_get_dev_id(struct smi_info *smi_info) | |
2808 | { | |
2809 | unsigned char msg[2]; | |
2810 | unsigned char *resp; | |
2811 | unsigned long resp_len; | |
2812 | int rv = 0; | |
2813 | ||
2814 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2815 | if (!resp) | |
2816 | return -ENOMEM; | |
2817 | ||
2818 | /* | |
2819 | * Do a Get Device ID command, since it comes back with some | |
2820 | * useful info. | |
2821 | */ | |
2822 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2823 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2824 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2825 | ||
2826 | rv = wait_for_msg_done(smi_info); | |
2827 | if (rv) | |
1da177e4 | 2828 | goto out; |
1da177e4 | 2829 | |
1da177e4 LT |
2830 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, |
2831 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 2832 | |
d8c98618 CM |
2833 | /* Check and record info from the get device id, in case we need it. */ |
2834 | rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); | |
1da177e4 LT |
2835 | |
2836 | out: | |
2837 | kfree(resp); | |
2838 | return rv; | |
2839 | } | |
2840 | ||
40112ae7 CM |
2841 | static int try_enable_event_buffer(struct smi_info *smi_info) |
2842 | { | |
2843 | unsigned char msg[3]; | |
2844 | unsigned char *resp; | |
2845 | unsigned long resp_len; | |
2846 | int rv = 0; | |
2847 | ||
2848 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2849 | if (!resp) | |
2850 | return -ENOMEM; | |
2851 | ||
2852 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2853 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
2854 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2855 | ||
2856 | rv = wait_for_msg_done(smi_info); | |
2857 | if (rv) { | |
279fbd0c MS |
2858 | printk(KERN_WARNING PFX "Error getting response from get" |
2859 | " global enables command, the event buffer is not" | |
40112ae7 CM |
2860 | " enabled.\n"); |
2861 | goto out; | |
2862 | } | |
2863 | ||
2864 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2865 | resp, IPMI_MAX_MSG_LENGTH); | |
2866 | ||
2867 | if (resp_len < 4 || | |
2868 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2869 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
2870 | resp[2] != 0) { | |
279fbd0c MS |
2871 | printk(KERN_WARNING PFX "Invalid return from get global" |
2872 | " enables command, cannot enable the event buffer.\n"); | |
40112ae7 CM |
2873 | rv = -EINVAL; |
2874 | goto out; | |
2875 | } | |
2876 | ||
2877 | if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) | |
2878 | /* buffer is already enabled, nothing to do. */ | |
2879 | goto out; | |
2880 | ||
2881 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2882 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
2883 | msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; | |
2884 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
2885 | ||
2886 | rv = wait_for_msg_done(smi_info); | |
2887 | if (rv) { | |
279fbd0c MS |
2888 | printk(KERN_WARNING PFX "Error getting response from set" |
2889 | " global, enables command, the event buffer is not" | |
40112ae7 CM |
2890 | " enabled.\n"); |
2891 | goto out; | |
2892 | } | |
2893 | ||
2894 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2895 | resp, IPMI_MAX_MSG_LENGTH); | |
2896 | ||
2897 | if (resp_len < 3 || | |
2898 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2899 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
279fbd0c MS |
2900 | printk(KERN_WARNING PFX "Invalid return from get global," |
2901 | "enables command, not enable the event buffer.\n"); | |
40112ae7 CM |
2902 | rv = -EINVAL; |
2903 | goto out; | |
2904 | } | |
2905 | ||
2906 | if (resp[2] != 0) | |
2907 | /* | |
2908 | * An error when setting the event buffer bit means | |
2909 | * that the event buffer is not supported. | |
2910 | */ | |
2911 | rv = -ENOENT; | |
2912 | out: | |
2913 | kfree(resp); | |
2914 | return rv; | |
2915 | } | |
2916 | ||
07412736 | 2917 | static int smi_type_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2918 | { |
07412736 | 2919 | struct smi_info *smi = m->private; |
1da177e4 | 2920 | |
07412736 | 2921 | return seq_printf(m, "%s\n", si_to_str[smi->si_type]); |
1da177e4 LT |
2922 | } |
2923 | ||
07412736 | 2924 | static int smi_type_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2925 | { |
d9dda78b | 2926 | return single_open(file, smi_type_proc_show, PDE_DATA(inode)); |
07412736 AD |
2927 | } |
2928 | ||
2929 | static const struct file_operations smi_type_proc_ops = { | |
2930 | .open = smi_type_proc_open, | |
2931 | .read = seq_read, | |
2932 | .llseek = seq_lseek, | |
2933 | .release = single_release, | |
2934 | }; | |
2935 | ||
2936 | static int smi_si_stats_proc_show(struct seq_file *m, void *v) | |
2937 | { | |
2938 | struct smi_info *smi = m->private; | |
1da177e4 | 2939 | |
07412736 | 2940 | seq_printf(m, "interrupts_enabled: %d\n", |
b0defcdb | 2941 | smi->irq && !smi->interrupt_disabled); |
07412736 | 2942 | seq_printf(m, "short_timeouts: %u\n", |
64959e2d | 2943 | smi_get_stat(smi, short_timeouts)); |
07412736 | 2944 | seq_printf(m, "long_timeouts: %u\n", |
64959e2d | 2945 | smi_get_stat(smi, long_timeouts)); |
07412736 | 2946 | seq_printf(m, "idles: %u\n", |
64959e2d | 2947 | smi_get_stat(smi, idles)); |
07412736 | 2948 | seq_printf(m, "interrupts: %u\n", |
64959e2d | 2949 | smi_get_stat(smi, interrupts)); |
07412736 | 2950 | seq_printf(m, "attentions: %u\n", |
64959e2d | 2951 | smi_get_stat(smi, attentions)); |
07412736 | 2952 | seq_printf(m, "flag_fetches: %u\n", |
64959e2d | 2953 | smi_get_stat(smi, flag_fetches)); |
07412736 | 2954 | seq_printf(m, "hosed_count: %u\n", |
64959e2d | 2955 | smi_get_stat(smi, hosed_count)); |
07412736 | 2956 | seq_printf(m, "complete_transactions: %u\n", |
64959e2d | 2957 | smi_get_stat(smi, complete_transactions)); |
07412736 | 2958 | seq_printf(m, "events: %u\n", |
64959e2d | 2959 | smi_get_stat(smi, events)); |
07412736 | 2960 | seq_printf(m, "watchdog_pretimeouts: %u\n", |
64959e2d | 2961 | smi_get_stat(smi, watchdog_pretimeouts)); |
07412736 | 2962 | seq_printf(m, "incoming_messages: %u\n", |
64959e2d | 2963 | smi_get_stat(smi, incoming_messages)); |
07412736 AD |
2964 | return 0; |
2965 | } | |
1da177e4 | 2966 | |
07412736 AD |
2967 | static int smi_si_stats_proc_open(struct inode *inode, struct file *file) |
2968 | { | |
d9dda78b | 2969 | return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode)); |
b361e27b CM |
2970 | } |
2971 | ||
07412736 AD |
2972 | static const struct file_operations smi_si_stats_proc_ops = { |
2973 | .open = smi_si_stats_proc_open, | |
2974 | .read = seq_read, | |
2975 | .llseek = seq_lseek, | |
2976 | .release = single_release, | |
2977 | }; | |
2978 | ||
2979 | static int smi_params_proc_show(struct seq_file *m, void *v) | |
b361e27b | 2980 | { |
07412736 | 2981 | struct smi_info *smi = m->private; |
b361e27b | 2982 | |
07412736 | 2983 | return seq_printf(m, |
b361e27b CM |
2984 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", |
2985 | si_to_str[smi->si_type], | |
2986 | addr_space_to_str[smi->io.addr_type], | |
2987 | smi->io.addr_data, | |
2988 | smi->io.regspacing, | |
2989 | smi->io.regsize, | |
2990 | smi->io.regshift, | |
2991 | smi->irq, | |
2992 | smi->slave_addr); | |
1da177e4 LT |
2993 | } |
2994 | ||
07412736 AD |
2995 | static int smi_params_proc_open(struct inode *inode, struct file *file) |
2996 | { | |
d9dda78b | 2997 | return single_open(file, smi_params_proc_show, PDE_DATA(inode)); |
07412736 AD |
2998 | } |
2999 | ||
3000 | static const struct file_operations smi_params_proc_ops = { | |
3001 | .open = smi_params_proc_open, | |
3002 | .read = seq_read, | |
3003 | .llseek = seq_lseek, | |
3004 | .release = single_release, | |
3005 | }; | |
3006 | ||
3ae0e0f9 CM |
3007 | /* |
3008 | * oem_data_avail_to_receive_msg_avail | |
3009 | * @info - smi_info structure with msg_flags set | |
3010 | * | |
3011 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
3012 | * Returns 1 indicating need to re-run handle_flags(). | |
3013 | */ | |
3014 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
3015 | { | |
e8b33617 | 3016 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 3017 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
3018 | return 1; |
3019 | } | |
3020 | ||
3021 | /* | |
3022 | * setup_dell_poweredge_oem_data_handler | |
3023 | * @info - smi_info.device_id must be populated | |
3024 | * | |
3025 | * Systems that match, but have firmware version < 1.40 may assert | |
3026 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
3027 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
3028 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
3029 | * as RECEIVE_MSG_AVAIL instead. | |
3030 | * | |
3031 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
3032 | * assert the OEM[012] bits, and if it did, the driver would have to | |
3033 | * change to handle that properly, we don't actually check for the | |
3034 | * firmware version. | |
3035 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
3036 | * Device Revision = 0x80 | |
3037 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
3038 | * Firmware Revision2 = 0x40 BCD encoded | |
3039 | * IPMI Version = 0x51 IPMI 1.5 | |
3040 | * Manufacturer ID = A2 02 00 Dell IANA | |
3041 | * | |
d5a2b89a CM |
3042 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
3043 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
3044 | * | |
3ae0e0f9 CM |
3045 | */ |
3046 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
3047 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
3048 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 3049 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
3050 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
3051 | { | |
3052 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3053 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
3054 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
3055 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 3056 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
3057 | smi_info->oem_data_avail_handler = |
3058 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
3059 | } else if (ipmi_version_major(id) < 1 || |
3060 | (ipmi_version_major(id) == 1 && | |
3061 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
3062 | smi_info->oem_data_avail_handler = |
3063 | oem_data_avail_to_receive_msg_avail; | |
3064 | } | |
3ae0e0f9 CM |
3065 | } |
3066 | } | |
3067 | ||
ea94027b CM |
3068 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
3069 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
3070 | { | |
3071 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
3072 | ||
25985edc | 3073 | /* Make it a response */ |
ea94027b CM |
3074 | msg->rsp[0] = msg->data[0] | 4; |
3075 | msg->rsp[1] = msg->data[1]; | |
3076 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
3077 | msg->rsp_size = 3; | |
3078 | smi_info->curr_msg = NULL; | |
3079 | deliver_recv_msg(smi_info, msg); | |
3080 | } | |
3081 | ||
3082 | /* | |
3083 | * dell_poweredge_bt_xaction_handler | |
3084 | * @info - smi_info.device_id must be populated | |
3085 | * | |
3086 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
3087 | * not respond to a Get SDR command if the length of the data | |
3088 | * requested is exactly 0x3A, which leads to command timeouts and no | |
3089 | * data returned. This intercepts such commands, and causes userspace | |
3090 | * callers to try again with a different-sized buffer, which succeeds. | |
3091 | */ | |
3092 | ||
3093 | #define STORAGE_NETFN 0x0A | |
3094 | #define STORAGE_CMD_GET_SDR 0x23 | |
3095 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
3096 | unsigned long unused, | |
3097 | void *in) | |
3098 | { | |
3099 | struct smi_info *smi_info = in; | |
3100 | unsigned char *data = smi_info->curr_msg->data; | |
3101 | unsigned int size = smi_info->curr_msg->data_size; | |
3102 | if (size >= 8 && | |
3103 | (data[0]>>2) == STORAGE_NETFN && | |
3104 | data[1] == STORAGE_CMD_GET_SDR && | |
3105 | data[7] == 0x3A) { | |
3106 | return_hosed_msg_badsize(smi_info); | |
3107 | return NOTIFY_STOP; | |
3108 | } | |
3109 | return NOTIFY_DONE; | |
3110 | } | |
3111 | ||
3112 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
3113 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
3114 | }; | |
3115 | ||
3116 | /* | |
3117 | * setup_dell_poweredge_bt_xaction_handler | |
3118 | * @info - smi_info.device_id must be filled in already | |
3119 | * | |
3120 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
3121 | * when we know what function to use there. | |
3122 | */ | |
3123 | static void | |
3124 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
3125 | { | |
3126 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3127 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
3128 | smi_info->si_type == SI_BT) |
3129 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
3130 | } | |
3131 | ||
3ae0e0f9 CM |
3132 | /* |
3133 | * setup_oem_data_handler | |
3134 | * @info - smi_info.device_id must be filled in already | |
3135 | * | |
3136 | * Fills in smi_info.device_id.oem_data_available_handler | |
3137 | * when we know what function to use there. | |
3138 | */ | |
3139 | ||
3140 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
3141 | { | |
3142 | setup_dell_poweredge_oem_data_handler(smi_info); | |
3143 | } | |
3144 | ||
ea94027b CM |
3145 | static void setup_xaction_handlers(struct smi_info *smi_info) |
3146 | { | |
3147 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
3148 | } | |
3149 | ||
a9a2c44f CM |
3150 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
3151 | { | |
453823ba | 3152 | if (smi_info->intf) { |
c305e3d3 CM |
3153 | /* |
3154 | * The timer and thread are only running if the | |
3155 | * interface has been started up and registered. | |
3156 | */ | |
453823ba CM |
3157 | if (smi_info->thread != NULL) |
3158 | kthread_stop(smi_info->thread); | |
3159 | del_timer_sync(&smi_info->si_timer); | |
3160 | } | |
a9a2c44f CM |
3161 | } |
3162 | ||
0bbed20e | 3163 | static struct ipmi_default_vals |
b0defcdb CM |
3164 | { |
3165 | int type; | |
3166 | int port; | |
7420884c | 3167 | } ipmi_defaults[] = |
b0defcdb CM |
3168 | { |
3169 | { .type = SI_KCS, .port = 0xca2 }, | |
3170 | { .type = SI_SMIC, .port = 0xca9 }, | |
3171 | { .type = SI_BT, .port = 0xe4 }, | |
3172 | { .port = 0 } | |
3173 | }; | |
3174 | ||
2223cbec | 3175 | static void default_find_bmc(void) |
b0defcdb CM |
3176 | { |
3177 | struct smi_info *info; | |
3178 | int i; | |
3179 | ||
3180 | for (i = 0; ; i++) { | |
3181 | if (!ipmi_defaults[i].port) | |
3182 | break; | |
68e1ee62 | 3183 | #ifdef CONFIG_PPC |
4ff31d77 CK |
3184 | if (check_legacy_ioport(ipmi_defaults[i].port)) |
3185 | continue; | |
3186 | #endif | |
de5e2ddf | 3187 | info = smi_info_alloc(); |
a09f4855 AM |
3188 | if (!info) |
3189 | return; | |
4ff31d77 | 3190 | |
5fedc4a2 | 3191 | info->addr_source = SI_DEFAULT; |
b0defcdb CM |
3192 | |
3193 | info->si_type = ipmi_defaults[i].type; | |
3194 | info->io_setup = port_setup; | |
3195 | info->io.addr_data = ipmi_defaults[i].port; | |
3196 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
3197 | ||
3198 | info->io.addr = NULL; | |
3199 | info->io.regspacing = DEFAULT_REGSPACING; | |
3200 | info->io.regsize = DEFAULT_REGSPACING; | |
3201 | info->io.regshift = 0; | |
3202 | ||
2407d77a MG |
3203 | if (add_smi(info) == 0) { |
3204 | if ((try_smi_init(info)) == 0) { | |
3205 | /* Found one... */ | |
279fbd0c | 3206 | printk(KERN_INFO PFX "Found default %s" |
2407d77a MG |
3207 | " state machine at %s address 0x%lx\n", |
3208 | si_to_str[info->si_type], | |
3209 | addr_space_to_str[info->io.addr_type], | |
3210 | info->io.addr_data); | |
3211 | } else | |
3212 | cleanup_one_si(info); | |
7faefea6 YL |
3213 | } else { |
3214 | kfree(info); | |
b0defcdb CM |
3215 | } |
3216 | } | |
3217 | } | |
3218 | ||
3219 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 3220 | { |
b0defcdb | 3221 | struct smi_info *e; |
1da177e4 | 3222 | |
b0defcdb CM |
3223 | list_for_each_entry(e, &smi_infos, link) { |
3224 | if (e->io.addr_type != info->io.addr_type) | |
3225 | continue; | |
3226 | if (e->io.addr_data == info->io.addr_data) | |
3227 | return 0; | |
3228 | } | |
1da177e4 | 3229 | |
b0defcdb CM |
3230 | return 1; |
3231 | } | |
1da177e4 | 3232 | |
2407d77a | 3233 | static int add_smi(struct smi_info *new_smi) |
b0defcdb | 3234 | { |
2407d77a | 3235 | int rv = 0; |
b0defcdb | 3236 | |
279fbd0c | 3237 | printk(KERN_INFO PFX "Adding %s-specified %s state machine", |
2407d77a MG |
3238 | ipmi_addr_src_to_str[new_smi->addr_source], |
3239 | si_to_str[new_smi->si_type]); | |
d6dfd131 | 3240 | mutex_lock(&smi_infos_lock); |
b0defcdb | 3241 | if (!is_new_interface(new_smi)) { |
7bb671e3 | 3242 | printk(KERN_CONT " duplicate interface\n"); |
b0defcdb CM |
3243 | rv = -EBUSY; |
3244 | goto out_err; | |
3245 | } | |
1da177e4 | 3246 | |
2407d77a MG |
3247 | printk(KERN_CONT "\n"); |
3248 | ||
1da177e4 LT |
3249 | /* So we know not to free it unless we have allocated one. */ |
3250 | new_smi->intf = NULL; | |
3251 | new_smi->si_sm = NULL; | |
3252 | new_smi->handlers = NULL; | |
3253 | ||
2407d77a MG |
3254 | list_add_tail(&new_smi->link, &smi_infos); |
3255 | ||
3256 | out_err: | |
3257 | mutex_unlock(&smi_infos_lock); | |
3258 | return rv; | |
3259 | } | |
3260 | ||
3261 | static int try_smi_init(struct smi_info *new_smi) | |
3262 | { | |
3263 | int rv = 0; | |
3264 | int i; | |
3265 | ||
279fbd0c | 3266 | printk(KERN_INFO PFX "Trying %s-specified %s state" |
2407d77a MG |
3267 | " machine at %s address 0x%lx, slave address 0x%x," |
3268 | " irq %d\n", | |
3269 | ipmi_addr_src_to_str[new_smi->addr_source], | |
3270 | si_to_str[new_smi->si_type], | |
3271 | addr_space_to_str[new_smi->io.addr_type], | |
3272 | new_smi->io.addr_data, | |
3273 | new_smi->slave_addr, new_smi->irq); | |
3274 | ||
b0defcdb CM |
3275 | switch (new_smi->si_type) { |
3276 | case SI_KCS: | |
1da177e4 | 3277 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
3278 | break; |
3279 | ||
3280 | case SI_SMIC: | |
1da177e4 | 3281 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
3282 | break; |
3283 | ||
3284 | case SI_BT: | |
1da177e4 | 3285 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
3286 | break; |
3287 | ||
3288 | default: | |
1da177e4 LT |
3289 | /* No support for anything else yet. */ |
3290 | rv = -EIO; | |
3291 | goto out_err; | |
3292 | } | |
3293 | ||
3294 | /* Allocate the state machine's data and initialize it. */ | |
3295 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 3296 | if (!new_smi->si_sm) { |
279fbd0c MS |
3297 | printk(KERN_ERR PFX |
3298 | "Could not allocate state machine memory\n"); | |
1da177e4 LT |
3299 | rv = -ENOMEM; |
3300 | goto out_err; | |
3301 | } | |
3302 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
3303 | &new_smi->io); | |
3304 | ||
3305 | /* Now that we know the I/O size, we can set up the I/O. */ | |
3306 | rv = new_smi->io_setup(new_smi); | |
3307 | if (rv) { | |
279fbd0c | 3308 | printk(KERN_ERR PFX "Could not set up I/O space\n"); |
1da177e4 LT |
3309 | goto out_err; |
3310 | } | |
3311 | ||
1da177e4 LT |
3312 | /* Do low-level detection first. */ |
3313 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb | 3314 | if (new_smi->addr_source) |
279fbd0c | 3315 | printk(KERN_INFO PFX "Interface detection failed\n"); |
1da177e4 LT |
3316 | rv = -ENODEV; |
3317 | goto out_err; | |
3318 | } | |
3319 | ||
c305e3d3 CM |
3320 | /* |
3321 | * Attempt a get device id command. If it fails, we probably | |
3322 | * don't have a BMC here. | |
3323 | */ | |
1da177e4 | 3324 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
3325 | if (rv) { |
3326 | if (new_smi->addr_source) | |
279fbd0c | 3327 | printk(KERN_INFO PFX "There appears to be no BMC" |
b0defcdb | 3328 | " at this location\n"); |
1da177e4 | 3329 | goto out_err; |
b0defcdb | 3330 | } |
1da177e4 | 3331 | |
3ae0e0f9 | 3332 | setup_oem_data_handler(new_smi); |
ea94027b | 3333 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 3334 | |
1da177e4 LT |
3335 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); |
3336 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
3337 | new_smi->curr_msg = NULL; | |
3338 | atomic_set(&new_smi->req_events, 0); | |
3339 | new_smi->run_to_completion = 0; | |
64959e2d CM |
3340 | for (i = 0; i < SI_NUM_STATS; i++) |
3341 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 | 3342 | |
ea4078ca | 3343 | new_smi->interrupt_disabled = 1; |
a9a2c44f | 3344 | atomic_set(&new_smi->stop_operation, 0); |
b0defcdb CM |
3345 | new_smi->intf_num = smi_num; |
3346 | smi_num++; | |
1da177e4 | 3347 | |
40112ae7 CM |
3348 | rv = try_enable_event_buffer(new_smi); |
3349 | if (rv == 0) | |
3350 | new_smi->has_event_buffer = 1; | |
3351 | ||
c305e3d3 CM |
3352 | /* |
3353 | * Start clearing the flags before we enable interrupts or the | |
3354 | * timer to avoid racing with the timer. | |
3355 | */ | |
1da177e4 LT |
3356 | start_clear_flags(new_smi); |
3357 | /* IRQ is defined to be set when non-zero. */ | |
3358 | if (new_smi->irq) | |
3359 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
3360 | ||
50c812b2 | 3361 | if (!new_smi->dev) { |
c305e3d3 CM |
3362 | /* |
3363 | * If we don't already have a device from something | |
3364 | * else (like PCI), then register a new one. | |
3365 | */ | |
50c812b2 CM |
3366 | new_smi->pdev = platform_device_alloc("ipmi_si", |
3367 | new_smi->intf_num); | |
8b32b5d0 | 3368 | if (!new_smi->pdev) { |
279fbd0c MS |
3369 | printk(KERN_ERR PFX |
3370 | "Unable to allocate platform device\n"); | |
453823ba | 3371 | goto out_err; |
50c812b2 CM |
3372 | } |
3373 | new_smi->dev = &new_smi->pdev->dev; | |
fe2d5ffc | 3374 | new_smi->dev->driver = &ipmi_driver.driver; |
50c812b2 | 3375 | |
b48f5457 | 3376 | rv = platform_device_add(new_smi->pdev); |
50c812b2 | 3377 | if (rv) { |
279fbd0c MS |
3378 | printk(KERN_ERR PFX |
3379 | "Unable to register system interface device:" | |
50c812b2 CM |
3380 | " %d\n", |
3381 | rv); | |
453823ba | 3382 | goto out_err; |
50c812b2 CM |
3383 | } |
3384 | new_smi->dev_registered = 1; | |
3385 | } | |
3386 | ||
1da177e4 LT |
3387 | rv = ipmi_register_smi(&handlers, |
3388 | new_smi, | |
50c812b2 CM |
3389 | &new_smi->device_id, |
3390 | new_smi->dev, | |
759643b8 | 3391 | "bmc", |
453823ba | 3392 | new_smi->slave_addr); |
1da177e4 | 3393 | if (rv) { |
279fbd0c MS |
3394 | dev_err(new_smi->dev, "Unable to register device: error %d\n", |
3395 | rv); | |
1da177e4 LT |
3396 | goto out_err_stop_timer; |
3397 | } | |
3398 | ||
3399 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
07412736 | 3400 | &smi_type_proc_ops, |
99b76233 | 3401 | new_smi); |
1da177e4 | 3402 | if (rv) { |
279fbd0c | 3403 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3404 | goto out_err_stop_timer; |
3405 | } | |
3406 | ||
3407 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
07412736 | 3408 | &smi_si_stats_proc_ops, |
99b76233 | 3409 | new_smi); |
1da177e4 | 3410 | if (rv) { |
279fbd0c | 3411 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3412 | goto out_err_stop_timer; |
3413 | } | |
3414 | ||
b361e27b | 3415 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
07412736 | 3416 | &smi_params_proc_ops, |
99b76233 | 3417 | new_smi); |
b361e27b | 3418 | if (rv) { |
279fbd0c | 3419 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
b361e27b CM |
3420 | goto out_err_stop_timer; |
3421 | } | |
3422 | ||
279fbd0c MS |
3423 | dev_info(new_smi->dev, "IPMI %s interface initialized\n", |
3424 | si_to_str[new_smi->si_type]); | |
1da177e4 LT |
3425 | |
3426 | return 0; | |
3427 | ||
3428 | out_err_stop_timer: | |
a9a2c44f CM |
3429 | atomic_inc(&new_smi->stop_operation); |
3430 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
3431 | |
3432 | out_err: | |
2407d77a MG |
3433 | new_smi->interrupt_disabled = 1; |
3434 | ||
3435 | if (new_smi->intf) { | |
1da177e4 | 3436 | ipmi_unregister_smi(new_smi->intf); |
2407d77a MG |
3437 | new_smi->intf = NULL; |
3438 | } | |
1da177e4 | 3439 | |
2407d77a | 3440 | if (new_smi->irq_cleanup) { |
b0defcdb | 3441 | new_smi->irq_cleanup(new_smi); |
2407d77a MG |
3442 | new_smi->irq_cleanup = NULL; |
3443 | } | |
1da177e4 | 3444 | |
c305e3d3 CM |
3445 | /* |
3446 | * Wait until we know that we are out of any interrupt | |
3447 | * handlers might have been running before we freed the | |
3448 | * interrupt. | |
3449 | */ | |
fbd568a3 | 3450 | synchronize_sched(); |
1da177e4 LT |
3451 | |
3452 | if (new_smi->si_sm) { | |
3453 | if (new_smi->handlers) | |
3454 | new_smi->handlers->cleanup(new_smi->si_sm); | |
3455 | kfree(new_smi->si_sm); | |
2407d77a | 3456 | new_smi->si_sm = NULL; |
1da177e4 | 3457 | } |
2407d77a | 3458 | if (new_smi->addr_source_cleanup) { |
b0defcdb | 3459 | new_smi->addr_source_cleanup(new_smi); |
2407d77a MG |
3460 | new_smi->addr_source_cleanup = NULL; |
3461 | } | |
3462 | if (new_smi->io_cleanup) { | |
7767e126 | 3463 | new_smi->io_cleanup(new_smi); |
2407d77a MG |
3464 | new_smi->io_cleanup = NULL; |
3465 | } | |
1da177e4 | 3466 | |
2407d77a | 3467 | if (new_smi->dev_registered) { |
50c812b2 | 3468 | platform_device_unregister(new_smi->pdev); |
2407d77a MG |
3469 | new_smi->dev_registered = 0; |
3470 | } | |
b0defcdb | 3471 | |
1da177e4 LT |
3472 | return rv; |
3473 | } | |
3474 | ||
2223cbec | 3475 | static int init_ipmi_si(void) |
1da177e4 | 3476 | { |
1da177e4 LT |
3477 | int i; |
3478 | char *str; | |
50c812b2 | 3479 | int rv; |
2407d77a | 3480 | struct smi_info *e; |
06ee4594 | 3481 | enum ipmi_addr_src type = SI_INVALID; |
1da177e4 LT |
3482 | |
3483 | if (initialized) | |
3484 | return 0; | |
3485 | initialized = 1; | |
3486 | ||
f2afae46 CM |
3487 | if (si_tryplatform) { |
3488 | rv = platform_driver_register(&ipmi_driver); | |
3489 | if (rv) { | |
3490 | printk(KERN_ERR PFX "Unable to register " | |
3491 | "driver: %d\n", rv); | |
3492 | return rv; | |
3493 | } | |
50c812b2 CM |
3494 | } |
3495 | ||
1da177e4 LT |
3496 | /* Parse out the si_type string into its components. */ |
3497 | str = si_type_str; | |
3498 | if (*str != '\0') { | |
e8b33617 | 3499 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
3500 | si_type[i] = str; |
3501 | str = strchr(str, ','); | |
3502 | if (str) { | |
3503 | *str = '\0'; | |
3504 | str++; | |
3505 | } else { | |
3506 | break; | |
3507 | } | |
3508 | } | |
3509 | } | |
3510 | ||
1fdd75bd | 3511 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 3512 | |
d8cc5267 | 3513 | /* If the user gave us a device, they presumably want us to use it */ |
a1e9c9dd | 3514 | if (!hardcode_find_bmc()) |
d8cc5267 | 3515 | return 0; |
d8cc5267 | 3516 | |
b0defcdb | 3517 | #ifdef CONFIG_PCI |
f2afae46 CM |
3518 | if (si_trypci) { |
3519 | rv = pci_register_driver(&ipmi_pci_driver); | |
3520 | if (rv) | |
3521 | printk(KERN_ERR PFX "Unable to register " | |
3522 | "PCI driver: %d\n", rv); | |
3523 | else | |
3524 | pci_registered = 1; | |
3525 | } | |
b0defcdb CM |
3526 | #endif |
3527 | ||
754d4531 | 3528 | #ifdef CONFIG_ACPI |
d941aeae CM |
3529 | if (si_tryacpi) { |
3530 | pnp_register_driver(&ipmi_pnp_driver); | |
3531 | pnp_registered = 1; | |
3532 | } | |
754d4531 MG |
3533 | #endif |
3534 | ||
3535 | #ifdef CONFIG_DMI | |
d941aeae CM |
3536 | if (si_trydmi) |
3537 | dmi_find_bmc(); | |
754d4531 MG |
3538 | #endif |
3539 | ||
3540 | #ifdef CONFIG_ACPI | |
d941aeae CM |
3541 | if (si_tryacpi) |
3542 | spmi_find_bmc(); | |
754d4531 MG |
3543 | #endif |
3544 | ||
fdbeb7de TB |
3545 | #ifdef CONFIG_PARISC |
3546 | register_parisc_driver(&ipmi_parisc_driver); | |
3547 | parisc_registered = 1; | |
3548 | /* poking PC IO addresses will crash machine, don't do it */ | |
3549 | si_trydefaults = 0; | |
3550 | #endif | |
3551 | ||
06ee4594 MG |
3552 | /* We prefer devices with interrupts, but in the case of a machine |
3553 | with multiple BMCs we assume that there will be several instances | |
3554 | of a given type so if we succeed in registering a type then also | |
3555 | try to register everything else of the same type */ | |
d8cc5267 | 3556 | |
2407d77a MG |
3557 | mutex_lock(&smi_infos_lock); |
3558 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 MG |
3559 | /* Try to register a device if it has an IRQ and we either |
3560 | haven't successfully registered a device yet or this | |
3561 | device has the same type as one we successfully registered */ | |
3562 | if (e->irq && (!type || e->addr_source == type)) { | |
d8cc5267 | 3563 | if (!try_smi_init(e)) { |
06ee4594 | 3564 | type = e->addr_source; |
d8cc5267 MG |
3565 | } |
3566 | } | |
3567 | } | |
3568 | ||
06ee4594 MG |
3569 | /* type will only have been set if we successfully registered an si */ |
3570 | if (type) { | |
3571 | mutex_unlock(&smi_infos_lock); | |
3572 | return 0; | |
3573 | } | |
3574 | ||
d8cc5267 MG |
3575 | /* Fall back to the preferred device */ |
3576 | ||
3577 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 | 3578 | if (!e->irq && (!type || e->addr_source == type)) { |
d8cc5267 | 3579 | if (!try_smi_init(e)) { |
06ee4594 | 3580 | type = e->addr_source; |
d8cc5267 MG |
3581 | } |
3582 | } | |
2407d77a MG |
3583 | } |
3584 | mutex_unlock(&smi_infos_lock); | |
3585 | ||
06ee4594 MG |
3586 | if (type) |
3587 | return 0; | |
3588 | ||
b0defcdb | 3589 | if (si_trydefaults) { |
d6dfd131 | 3590 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3591 | if (list_empty(&smi_infos)) { |
3592 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 3593 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3594 | default_find_bmc(); |
2407d77a | 3595 | } else |
d6dfd131 | 3596 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3597 | } |
3598 | ||
d6dfd131 | 3599 | mutex_lock(&smi_infos_lock); |
b361e27b | 3600 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 3601 | mutex_unlock(&smi_infos_lock); |
d2478521 | 3602 | cleanup_ipmi_si(); |
279fbd0c MS |
3603 | printk(KERN_WARNING PFX |
3604 | "Unable to find any System Interface(s)\n"); | |
1da177e4 | 3605 | return -ENODEV; |
b0defcdb | 3606 | } else { |
d6dfd131 | 3607 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3608 | return 0; |
1da177e4 | 3609 | } |
1da177e4 LT |
3610 | } |
3611 | module_init(init_ipmi_si); | |
3612 | ||
b361e27b | 3613 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 | 3614 | { |
2407d77a | 3615 | int rv = 0; |
1da177e4 LT |
3616 | unsigned long flags; |
3617 | ||
b0defcdb | 3618 | if (!to_clean) |
1da177e4 LT |
3619 | return; |
3620 | ||
b0defcdb CM |
3621 | list_del(&to_clean->link); |
3622 | ||
ee6cd5f8 | 3623 | /* Tell the driver that we are shutting down. */ |
a9a2c44f | 3624 | atomic_inc(&to_clean->stop_operation); |
b0defcdb | 3625 | |
c305e3d3 CM |
3626 | /* |
3627 | * Make sure the timer and thread are stopped and will not run | |
3628 | * again. | |
3629 | */ | |
a9a2c44f | 3630 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 3631 | |
c305e3d3 CM |
3632 | /* |
3633 | * Timeouts are stopped, now make sure the interrupts are off | |
3634 | * for the device. A little tricky with locks to make sure | |
3635 | * there are no races. | |
3636 | */ | |
ee6cd5f8 CM |
3637 | spin_lock_irqsave(&to_clean->si_lock, flags); |
3638 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3639 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3640 | poll(to_clean); | |
3641 | schedule_timeout_uninterruptible(1); | |
3642 | spin_lock_irqsave(&to_clean->si_lock, flags); | |
3643 | } | |
3644 | disable_si_irq(to_clean); | |
3645 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3646 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3647 | poll(to_clean); | |
3648 | schedule_timeout_uninterruptible(1); | |
3649 | } | |
3650 | ||
3651 | /* Clean up interrupts and make sure that everything is done. */ | |
3652 | if (to_clean->irq_cleanup) | |
3653 | to_clean->irq_cleanup(to_clean); | |
e8b33617 | 3654 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 3655 | poll(to_clean); |
da4cd8df | 3656 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
3657 | } |
3658 | ||
2407d77a MG |
3659 | if (to_clean->intf) |
3660 | rv = ipmi_unregister_smi(to_clean->intf); | |
3661 | ||
1da177e4 | 3662 | if (rv) { |
279fbd0c | 3663 | printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n", |
1da177e4 LT |
3664 | rv); |
3665 | } | |
3666 | ||
2407d77a MG |
3667 | if (to_clean->handlers) |
3668 | to_clean->handlers->cleanup(to_clean->si_sm); | |
1da177e4 LT |
3669 | |
3670 | kfree(to_clean->si_sm); | |
3671 | ||
b0defcdb CM |
3672 | if (to_clean->addr_source_cleanup) |
3673 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
3674 | if (to_clean->io_cleanup) |
3675 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
3676 | |
3677 | if (to_clean->dev_registered) | |
3678 | platform_device_unregister(to_clean->pdev); | |
3679 | ||
3680 | kfree(to_clean); | |
1da177e4 LT |
3681 | } |
3682 | ||
0dcf334c | 3683 | static void cleanup_ipmi_si(void) |
1da177e4 | 3684 | { |
b0defcdb | 3685 | struct smi_info *e, *tmp_e; |
1da177e4 | 3686 | |
b0defcdb | 3687 | if (!initialized) |
1da177e4 LT |
3688 | return; |
3689 | ||
b0defcdb | 3690 | #ifdef CONFIG_PCI |
56480287 MG |
3691 | if (pci_registered) |
3692 | pci_unregister_driver(&ipmi_pci_driver); | |
b0defcdb | 3693 | #endif |
27d0567a | 3694 | #ifdef CONFIG_ACPI |
561f8182 YL |
3695 | if (pnp_registered) |
3696 | pnp_unregister_driver(&ipmi_pnp_driver); | |
9e368fa0 | 3697 | #endif |
fdbeb7de TB |
3698 | #ifdef CONFIG_PARISC |
3699 | if (parisc_registered) | |
3700 | unregister_parisc_driver(&ipmi_parisc_driver); | |
3701 | #endif | |
b0defcdb | 3702 | |
a1e9c9dd | 3703 | platform_driver_unregister(&ipmi_driver); |
dba9b4f6 | 3704 | |
d6dfd131 | 3705 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3706 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
3707 | cleanup_one_si(e); | |
d6dfd131 | 3708 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3709 | } |
3710 | module_exit(cleanup_ipmi_si); | |
3711 | ||
3712 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 3713 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
3714 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
3715 | " system interfaces."); |