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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 | |
50c812b2 CM |
114 | #define DEVICE_NAME "ipmi_si" |
115 | ||
a1e9c9dd | 116 | static struct platform_driver ipmi_driver; |
64959e2d CM |
117 | |
118 | /* | |
119 | * Indexes into stats[] in smi_info below. | |
120 | */ | |
ba8ff1c6 CM |
121 | enum si_stat_indexes { |
122 | /* | |
123 | * Number of times the driver requested a timer while an operation | |
124 | * was in progress. | |
125 | */ | |
126 | SI_STAT_short_timeouts = 0, | |
127 | ||
128 | /* | |
129 | * Number of times the driver requested a timer while nothing was in | |
130 | * progress. | |
131 | */ | |
132 | SI_STAT_long_timeouts, | |
133 | ||
134 | /* Number of times the interface was idle while being polled. */ | |
135 | SI_STAT_idles, | |
136 | ||
137 | /* Number of interrupts the driver handled. */ | |
138 | SI_STAT_interrupts, | |
139 | ||
140 | /* Number of time the driver got an ATTN from the hardware. */ | |
141 | SI_STAT_attentions, | |
64959e2d | 142 | |
ba8ff1c6 CM |
143 | /* Number of times the driver requested flags from the hardware. */ |
144 | SI_STAT_flag_fetches, | |
145 | ||
146 | /* Number of times the hardware didn't follow the state machine. */ | |
147 | SI_STAT_hosed_count, | |
148 | ||
149 | /* Number of completed messages. */ | |
150 | SI_STAT_complete_transactions, | |
151 | ||
152 | /* Number of IPMI events received from the hardware. */ | |
153 | SI_STAT_events, | |
154 | ||
155 | /* Number of watchdog pretimeouts. */ | |
156 | SI_STAT_watchdog_pretimeouts, | |
157 | ||
b3834be5 | 158 | /* Number of asynchronous messages received. */ |
ba8ff1c6 CM |
159 | SI_STAT_incoming_messages, |
160 | ||
161 | ||
162 | /* This *must* remain last, add new values above this. */ | |
163 | SI_NUM_STATS | |
164 | }; | |
64959e2d | 165 | |
c305e3d3 | 166 | struct smi_info { |
a9a2c44f | 167 | int intf_num; |
1da177e4 LT |
168 | ipmi_smi_t intf; |
169 | struct si_sm_data *si_sm; | |
170 | struct si_sm_handlers *handlers; | |
171 | enum si_type si_type; | |
172 | spinlock_t si_lock; | |
1da177e4 LT |
173 | struct list_head xmit_msgs; |
174 | struct list_head hp_xmit_msgs; | |
175 | struct ipmi_smi_msg *curr_msg; | |
176 | enum si_intf_state si_state; | |
177 | ||
c305e3d3 CM |
178 | /* |
179 | * Used to handle the various types of I/O that can occur with | |
180 | * IPMI | |
181 | */ | |
1da177e4 LT |
182 | struct si_sm_io io; |
183 | int (*io_setup)(struct smi_info *info); | |
184 | void (*io_cleanup)(struct smi_info *info); | |
185 | int (*irq_setup)(struct smi_info *info); | |
186 | void (*irq_cleanup)(struct smi_info *info); | |
187 | unsigned int io_size; | |
5fedc4a2 | 188 | enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */ |
b0defcdb CM |
189 | void (*addr_source_cleanup)(struct smi_info *info); |
190 | void *addr_source_data; | |
1da177e4 | 191 | |
c305e3d3 CM |
192 | /* |
193 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
194 | * when handle_flags() needs to be re-run or 0 indicating it | |
195 | * set si_state itself. | |
196 | */ | |
3ae0e0f9 CM |
197 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
198 | ||
c305e3d3 CM |
199 | /* |
200 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
201 | * is set to hold the flags until we are done handling everything | |
202 | * from the flags. | |
203 | */ | |
1da177e4 LT |
204 | #define RECEIVE_MSG_AVAIL 0x01 |
205 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
206 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
207 | #define OEM0_DATA_AVAIL 0x20 |
208 | #define OEM1_DATA_AVAIL 0x40 | |
209 | #define OEM2_DATA_AVAIL 0x80 | |
210 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
211 | OEM1_DATA_AVAIL | \ |
212 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
213 | unsigned char msg_flags; |
214 | ||
40112ae7 | 215 | /* Does the BMC have an event buffer? */ |
7aefac26 | 216 | bool has_event_buffer; |
40112ae7 | 217 | |
c305e3d3 CM |
218 | /* |
219 | * If set to true, this will request events the next time the | |
220 | * state machine is idle. | |
221 | */ | |
1da177e4 LT |
222 | atomic_t req_events; |
223 | ||
c305e3d3 CM |
224 | /* |
225 | * If true, run the state machine to completion on every send | |
226 | * call. Generally used after a panic to make sure stuff goes | |
227 | * out. | |
228 | */ | |
7aefac26 | 229 | bool run_to_completion; |
1da177e4 LT |
230 | |
231 | /* The I/O port of an SI interface. */ | |
232 | int port; | |
233 | ||
c305e3d3 CM |
234 | /* |
235 | * The space between start addresses of the two ports. For | |
236 | * instance, if the first port is 0xca2 and the spacing is 4, then | |
237 | * the second port is 0xca6. | |
238 | */ | |
1da177e4 LT |
239 | unsigned int spacing; |
240 | ||
241 | /* zero if no irq; */ | |
242 | int irq; | |
243 | ||
244 | /* The timer for this si. */ | |
245 | struct timer_list si_timer; | |
246 | ||
48e8ac29 BS |
247 | /* This flag is set, if the timer is running (timer_pending() isn't enough) */ |
248 | bool timer_running; | |
249 | ||
1da177e4 LT |
250 | /* The time (in jiffies) the last timeout occurred at. */ |
251 | unsigned long last_timeout_jiffies; | |
252 | ||
253 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 254 | atomic_t stop_operation; |
1da177e4 | 255 | |
89986496 CM |
256 | /* Are we waiting for the events, pretimeouts, received msgs? */ |
257 | atomic_t need_watch; | |
258 | ||
c305e3d3 CM |
259 | /* |
260 | * The driver will disable interrupts when it gets into a | |
261 | * situation where it cannot handle messages due to lack of | |
262 | * memory. Once that situation clears up, it will re-enable | |
263 | * interrupts. | |
264 | */ | |
7aefac26 | 265 | bool interrupt_disabled; |
1da177e4 | 266 | |
50c812b2 | 267 | /* From the get device id response... */ |
3ae0e0f9 | 268 | struct ipmi_device_id device_id; |
1da177e4 | 269 | |
50c812b2 CM |
270 | /* Driver model stuff. */ |
271 | struct device *dev; | |
272 | struct platform_device *pdev; | |
273 | ||
c305e3d3 CM |
274 | /* |
275 | * True if we allocated the device, false if it came from | |
276 | * someplace else (like PCI). | |
277 | */ | |
7aefac26 | 278 | bool dev_registered; |
50c812b2 | 279 | |
1da177e4 LT |
280 | /* Slave address, could be reported from DMI. */ |
281 | unsigned char slave_addr; | |
282 | ||
283 | /* Counters and things for the proc filesystem. */ | |
64959e2d | 284 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 285 | |
c305e3d3 | 286 | struct task_struct *thread; |
b0defcdb CM |
287 | |
288 | struct list_head link; | |
16f4232c | 289 | union ipmi_smi_info_union addr_info; |
1da177e4 LT |
290 | }; |
291 | ||
64959e2d CM |
292 | #define smi_inc_stat(smi, stat) \ |
293 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
294 | #define smi_get_stat(smi, stat) \ | |
295 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
296 | ||
a51f4a81 CM |
297 | #define SI_MAX_PARMS 4 |
298 | ||
299 | static int force_kipmid[SI_MAX_PARMS]; | |
300 | static int num_force_kipmid; | |
56480287 | 301 | #ifdef CONFIG_PCI |
7aefac26 | 302 | static bool pci_registered; |
56480287 | 303 | #endif |
561f8182 | 304 | #ifdef CONFIG_ACPI |
7aefac26 | 305 | static bool pnp_registered; |
561f8182 | 306 | #endif |
fdbeb7de | 307 | #ifdef CONFIG_PARISC |
7aefac26 | 308 | static bool parisc_registered; |
fdbeb7de | 309 | #endif |
a51f4a81 | 310 | |
ae74e823 MW |
311 | static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; |
312 | static int num_max_busy_us; | |
313 | ||
7aefac26 | 314 | static bool unload_when_empty = true; |
b361e27b | 315 | |
2407d77a | 316 | static int add_smi(struct smi_info *smi); |
b0defcdb | 317 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 318 | static void cleanup_one_si(struct smi_info *to_clean); |
d2478521 | 319 | static void cleanup_ipmi_si(void); |
b0defcdb | 320 | |
e041c683 | 321 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 322 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 323 | { |
e041c683 | 324 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
325 | } |
326 | ||
1da177e4 LT |
327 | static void deliver_recv_msg(struct smi_info *smi_info, |
328 | struct ipmi_smi_msg *msg) | |
329 | { | |
7adf579c | 330 | /* Deliver the message to the upper layer. */ |
968bf7cc CM |
331 | if (smi_info->intf) |
332 | ipmi_smi_msg_received(smi_info->intf, msg); | |
333 | else | |
334 | ipmi_free_smi_msg(msg); | |
1da177e4 LT |
335 | } |
336 | ||
4d7cbac7 | 337 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
338 | { |
339 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
340 | ||
4d7cbac7 CM |
341 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
342 | cCode = IPMI_ERR_UNSPECIFIED; | |
343 | /* else use it as is */ | |
344 | ||
25985edc | 345 | /* Make it a response */ |
1da177e4 LT |
346 | msg->rsp[0] = msg->data[0] | 4; |
347 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 348 | msg->rsp[2] = cCode; |
1da177e4 LT |
349 | msg->rsp_size = 3; |
350 | ||
351 | smi_info->curr_msg = NULL; | |
352 | deliver_recv_msg(smi_info, msg); | |
353 | } | |
354 | ||
355 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
356 | { | |
357 | int rv; | |
358 | struct list_head *entry = NULL; | |
359 | #ifdef DEBUG_TIMING | |
360 | struct timeval t; | |
361 | #endif | |
362 | ||
1da177e4 | 363 | /* Pick the high priority queue first. */ |
b0defcdb | 364 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 365 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 366 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
367 | entry = smi_info->xmit_msgs.next; |
368 | } | |
369 | ||
b0defcdb | 370 | if (!entry) { |
1da177e4 LT |
371 | smi_info->curr_msg = NULL; |
372 | rv = SI_SM_IDLE; | |
373 | } else { | |
374 | int err; | |
375 | ||
376 | list_del(entry); | |
377 | smi_info->curr_msg = list_entry(entry, | |
378 | struct ipmi_smi_msg, | |
379 | link); | |
380 | #ifdef DEBUG_TIMING | |
381 | do_gettimeofday(&t); | |
c305e3d3 | 382 | printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 | 383 | #endif |
e041c683 AS |
384 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
385 | 0, smi_info); | |
ea94027b CM |
386 | if (err & NOTIFY_STOP_MASK) { |
387 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
388 | goto out; | |
389 | } | |
1da177e4 LT |
390 | err = smi_info->handlers->start_transaction( |
391 | smi_info->si_sm, | |
392 | smi_info->curr_msg->data, | |
393 | smi_info->curr_msg->data_size); | |
c305e3d3 | 394 | if (err) |
4d7cbac7 | 395 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
396 | |
397 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
398 | } | |
c305e3d3 | 399 | out: |
1da177e4 LT |
400 | return rv; |
401 | } | |
402 | ||
403 | static void start_enable_irq(struct smi_info *smi_info) | |
404 | { | |
405 | unsigned char msg[2]; | |
406 | ||
c305e3d3 CM |
407 | /* |
408 | * If we are enabling interrupts, we have to tell the | |
409 | * BMC to use them. | |
410 | */ | |
1da177e4 LT |
411 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
412 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
413 | ||
414 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
415 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
416 | } | |
417 | ||
ee6cd5f8 CM |
418 | static void start_disable_irq(struct smi_info *smi_info) |
419 | { | |
420 | unsigned char msg[2]; | |
421 | ||
422 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
423 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
424 | ||
425 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
426 | smi_info->si_state = SI_DISABLE_INTERRUPTS1; | |
427 | } | |
428 | ||
1da177e4 LT |
429 | static void start_clear_flags(struct smi_info *smi_info) |
430 | { | |
431 | unsigned char msg[3]; | |
432 | ||
433 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
434 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
435 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
436 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
437 | ||
438 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
439 | smi_info->si_state = SI_CLEARING_FLAGS; | |
440 | } | |
441 | ||
968bf7cc CM |
442 | static void start_getting_msg_queue(struct smi_info *smi_info) |
443 | { | |
444 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
445 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
446 | smi_info->curr_msg->data_size = 2; | |
447 | ||
448 | smi_info->handlers->start_transaction( | |
449 | smi_info->si_sm, | |
450 | smi_info->curr_msg->data, | |
451 | smi_info->curr_msg->data_size); | |
452 | smi_info->si_state = SI_GETTING_MESSAGES; | |
453 | } | |
454 | ||
455 | static void start_getting_events(struct smi_info *smi_info) | |
456 | { | |
457 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
458 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
459 | smi_info->curr_msg->data_size = 2; | |
460 | ||
461 | smi_info->handlers->start_transaction( | |
462 | smi_info->si_sm, | |
463 | smi_info->curr_msg->data, | |
464 | smi_info->curr_msg->data_size); | |
465 | smi_info->si_state = SI_GETTING_EVENTS; | |
466 | } | |
467 | ||
48e8ac29 BS |
468 | static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val) |
469 | { | |
470 | smi_info->last_timeout_jiffies = jiffies; | |
471 | mod_timer(&smi_info->si_timer, new_val); | |
472 | smi_info->timer_running = true; | |
473 | } | |
474 | ||
c305e3d3 CM |
475 | /* |
476 | * When we have a situtaion where we run out of memory and cannot | |
477 | * allocate messages, we just leave them in the BMC and run the system | |
478 | * polled until we can allocate some memory. Once we have some | |
479 | * memory, we will re-enable the interrupt. | |
480 | */ | |
968bf7cc | 481 | static inline bool disable_si_irq(struct smi_info *smi_info) |
1da177e4 | 482 | { |
b0defcdb | 483 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
ee6cd5f8 | 484 | start_disable_irq(smi_info); |
7aefac26 | 485 | smi_info->interrupt_disabled = true; |
968bf7cc | 486 | return true; |
1da177e4 | 487 | } |
968bf7cc | 488 | return false; |
1da177e4 LT |
489 | } |
490 | ||
968bf7cc | 491 | static inline bool enable_si_irq(struct smi_info *smi_info) |
1da177e4 LT |
492 | { |
493 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
ee6cd5f8 | 494 | start_enable_irq(smi_info); |
7aefac26 | 495 | smi_info->interrupt_disabled = false; |
968bf7cc CM |
496 | return true; |
497 | } | |
498 | return false; | |
499 | } | |
500 | ||
501 | /* | |
502 | * Allocate a message. If unable to allocate, start the interrupt | |
503 | * disable process and return NULL. If able to allocate but | |
504 | * interrupts are disabled, free the message and return NULL after | |
505 | * starting the interrupt enable process. | |
506 | */ | |
507 | static struct ipmi_smi_msg *alloc_msg_handle_irq(struct smi_info *smi_info) | |
508 | { | |
509 | struct ipmi_smi_msg *msg; | |
510 | ||
511 | msg = ipmi_alloc_smi_msg(); | |
512 | if (!msg) { | |
513 | if (!disable_si_irq(smi_info)) | |
514 | smi_info->si_state = SI_NORMAL; | |
515 | } else if (enable_si_irq(smi_info)) { | |
516 | ipmi_free_smi_msg(msg); | |
517 | msg = NULL; | |
1da177e4 | 518 | } |
968bf7cc | 519 | return msg; |
1da177e4 LT |
520 | } |
521 | ||
522 | static void handle_flags(struct smi_info *smi_info) | |
523 | { | |
3ae0e0f9 | 524 | retry: |
1da177e4 LT |
525 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
526 | /* Watchdog pre-timeout */ | |
64959e2d | 527 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 LT |
528 | |
529 | start_clear_flags(smi_info); | |
530 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
968bf7cc CM |
531 | if (smi_info->intf) |
532 | ipmi_smi_watchdog_pretimeout(smi_info->intf); | |
1da177e4 LT |
533 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { |
534 | /* Messages available. */ | |
968bf7cc CM |
535 | smi_info->curr_msg = alloc_msg_handle_irq(smi_info); |
536 | if (!smi_info->curr_msg) | |
1da177e4 | 537 | return; |
1da177e4 | 538 | |
968bf7cc | 539 | start_getting_msg_queue(smi_info); |
1da177e4 LT |
540 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { |
541 | /* Events available. */ | |
968bf7cc CM |
542 | smi_info->curr_msg = alloc_msg_handle_irq(smi_info); |
543 | if (!smi_info->curr_msg) | |
1da177e4 | 544 | return; |
1da177e4 | 545 | |
968bf7cc | 546 | start_getting_events(smi_info); |
4064d5ef | 547 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 548 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
549 | if (smi_info->oem_data_avail_handler(smi_info)) |
550 | goto retry; | |
c305e3d3 | 551 | } else |
1da177e4 | 552 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
553 | } |
554 | ||
555 | static void handle_transaction_done(struct smi_info *smi_info) | |
556 | { | |
557 | struct ipmi_smi_msg *msg; | |
558 | #ifdef DEBUG_TIMING | |
559 | struct timeval t; | |
560 | ||
561 | do_gettimeofday(&t); | |
c305e3d3 | 562 | printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
563 | #endif |
564 | switch (smi_info->si_state) { | |
565 | case SI_NORMAL: | |
b0defcdb | 566 | if (!smi_info->curr_msg) |
1da177e4 LT |
567 | break; |
568 | ||
569 | smi_info->curr_msg->rsp_size | |
570 | = smi_info->handlers->get_result( | |
571 | smi_info->si_sm, | |
572 | smi_info->curr_msg->rsp, | |
573 | IPMI_MAX_MSG_LENGTH); | |
574 | ||
c305e3d3 CM |
575 | /* |
576 | * Do this here becase deliver_recv_msg() releases the | |
577 | * lock, and a new message can be put in during the | |
578 | * time the lock is released. | |
579 | */ | |
1da177e4 LT |
580 | msg = smi_info->curr_msg; |
581 | smi_info->curr_msg = NULL; | |
582 | deliver_recv_msg(smi_info, msg); | |
583 | break; | |
584 | ||
585 | case SI_GETTING_FLAGS: | |
586 | { | |
587 | unsigned char msg[4]; | |
588 | unsigned int len; | |
589 | ||
590 | /* We got the flags from the SMI, now handle them. */ | |
591 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
592 | if (msg[2] != 0) { | |
c305e3d3 | 593 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
594 | smi_info->si_state = SI_NORMAL; |
595 | } else if (len < 4) { | |
c305e3d3 CM |
596 | /* |
597 | * Hmm, no flags. That's technically illegal, but | |
598 | * don't use uninitialized data. | |
599 | */ | |
1da177e4 LT |
600 | smi_info->si_state = SI_NORMAL; |
601 | } else { | |
602 | smi_info->msg_flags = msg[3]; | |
603 | handle_flags(smi_info); | |
604 | } | |
605 | break; | |
606 | } | |
607 | ||
608 | case SI_CLEARING_FLAGS: | |
609 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
610 | { | |
611 | unsigned char msg[3]; | |
612 | ||
613 | /* We cleared the flags. */ | |
614 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
615 | if (msg[2] != 0) { | |
616 | /* Error clearing flags */ | |
279fbd0c MS |
617 | dev_warn(smi_info->dev, |
618 | "Error clearing flags: %2.2x\n", msg[2]); | |
1da177e4 LT |
619 | } |
620 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
621 | start_enable_irq(smi_info); | |
622 | else | |
623 | smi_info->si_state = SI_NORMAL; | |
624 | break; | |
625 | } | |
626 | ||
627 | case SI_GETTING_EVENTS: | |
628 | { | |
629 | smi_info->curr_msg->rsp_size | |
630 | = smi_info->handlers->get_result( | |
631 | smi_info->si_sm, | |
632 | smi_info->curr_msg->rsp, | |
633 | IPMI_MAX_MSG_LENGTH); | |
634 | ||
c305e3d3 CM |
635 | /* |
636 | * Do this here becase deliver_recv_msg() releases the | |
637 | * lock, and a new message can be put in during the | |
638 | * time the lock is released. | |
639 | */ | |
1da177e4 LT |
640 | msg = smi_info->curr_msg; |
641 | smi_info->curr_msg = NULL; | |
642 | if (msg->rsp[2] != 0) { | |
643 | /* Error getting event, probably done. */ | |
644 | msg->done(msg); | |
645 | ||
646 | /* Take off the event flag. */ | |
647 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
648 | handle_flags(smi_info); | |
649 | } else { | |
64959e2d | 650 | smi_inc_stat(smi_info, events); |
1da177e4 | 651 | |
c305e3d3 CM |
652 | /* |
653 | * Do this before we deliver the message | |
654 | * because delivering the message releases the | |
655 | * lock and something else can mess with the | |
656 | * state. | |
657 | */ | |
1da177e4 LT |
658 | handle_flags(smi_info); |
659 | ||
660 | deliver_recv_msg(smi_info, msg); | |
661 | } | |
662 | break; | |
663 | } | |
664 | ||
665 | case SI_GETTING_MESSAGES: | |
666 | { | |
667 | smi_info->curr_msg->rsp_size | |
668 | = smi_info->handlers->get_result( | |
669 | smi_info->si_sm, | |
670 | smi_info->curr_msg->rsp, | |
671 | IPMI_MAX_MSG_LENGTH); | |
672 | ||
c305e3d3 CM |
673 | /* |
674 | * Do this here becase deliver_recv_msg() releases the | |
675 | * lock, and a new message can be put in during the | |
676 | * time the lock is released. | |
677 | */ | |
1da177e4 LT |
678 | msg = smi_info->curr_msg; |
679 | smi_info->curr_msg = NULL; | |
680 | if (msg->rsp[2] != 0) { | |
681 | /* Error getting event, probably done. */ | |
682 | msg->done(msg); | |
683 | ||
684 | /* Take off the msg flag. */ | |
685 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
686 | handle_flags(smi_info); | |
687 | } else { | |
64959e2d | 688 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 689 | |
c305e3d3 CM |
690 | /* |
691 | * Do this before we deliver the message | |
692 | * because delivering the message releases the | |
693 | * lock and something else can mess with the | |
694 | * state. | |
695 | */ | |
1da177e4 LT |
696 | handle_flags(smi_info); |
697 | ||
698 | deliver_recv_msg(smi_info, msg); | |
699 | } | |
700 | break; | |
701 | } | |
702 | ||
703 | case SI_ENABLE_INTERRUPTS1: | |
704 | { | |
705 | unsigned char msg[4]; | |
706 | ||
707 | /* We got the flags from the SMI, now handle them. */ | |
708 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
709 | if (msg[2] != 0) { | |
0849bfec CM |
710 | dev_warn(smi_info->dev, |
711 | "Couldn't get irq info: %x.\n", msg[2]); | |
712 | dev_warn(smi_info->dev, | |
713 | "Maybe ok, but ipmi might run very slowly.\n"); | |
1da177e4 LT |
714 | smi_info->si_state = SI_NORMAL; |
715 | } else { | |
716 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
717 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
ee6cd5f8 CM |
718 | msg[2] = (msg[3] | |
719 | IPMI_BMC_RCV_MSG_INTR | | |
720 | IPMI_BMC_EVT_MSG_INTR); | |
1da177e4 LT |
721 | smi_info->handlers->start_transaction( |
722 | smi_info->si_sm, msg, 3); | |
723 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
724 | } | |
725 | break; | |
726 | } | |
727 | ||
728 | case SI_ENABLE_INTERRUPTS2: | |
729 | { | |
730 | unsigned char msg[4]; | |
731 | ||
732 | /* We got the flags from the SMI, now handle them. */ | |
733 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
0849bfec CM |
734 | if (msg[2] != 0) { |
735 | dev_warn(smi_info->dev, | |
736 | "Couldn't set irq info: %x.\n", msg[2]); | |
737 | dev_warn(smi_info->dev, | |
738 | "Maybe ok, but ipmi might run very slowly.\n"); | |
739 | } else | |
7aefac26 | 740 | smi_info->interrupt_disabled = false; |
968bf7cc CM |
741 | |
742 | /* We enabled interrupts, flags may be pending. */ | |
743 | handle_flags(smi_info); | |
1da177e4 LT |
744 | break; |
745 | } | |
ee6cd5f8 CM |
746 | |
747 | case SI_DISABLE_INTERRUPTS1: | |
748 | { | |
749 | unsigned char msg[4]; | |
750 | ||
751 | /* We got the flags from the SMI, now handle them. */ | |
752 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
753 | if (msg[2] != 0) { | |
279fbd0c MS |
754 | dev_warn(smi_info->dev, "Could not disable interrupts" |
755 | ", failed get.\n"); | |
ee6cd5f8 CM |
756 | smi_info->si_state = SI_NORMAL; |
757 | } else { | |
758 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
759 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
760 | msg[2] = (msg[3] & | |
761 | ~(IPMI_BMC_RCV_MSG_INTR | | |
762 | IPMI_BMC_EVT_MSG_INTR)); | |
763 | smi_info->handlers->start_transaction( | |
764 | smi_info->si_sm, msg, 3); | |
765 | smi_info->si_state = SI_DISABLE_INTERRUPTS2; | |
766 | } | |
767 | break; | |
768 | } | |
769 | ||
770 | case SI_DISABLE_INTERRUPTS2: | |
771 | { | |
772 | unsigned char msg[4]; | |
773 | ||
774 | /* We got the flags from the SMI, now handle them. */ | |
775 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
776 | if (msg[2] != 0) { | |
279fbd0c MS |
777 | dev_warn(smi_info->dev, "Could not disable interrupts" |
778 | ", failed set.\n"); | |
ee6cd5f8 CM |
779 | } |
780 | smi_info->si_state = SI_NORMAL; | |
781 | break; | |
782 | } | |
1da177e4 LT |
783 | } |
784 | } | |
785 | ||
c305e3d3 CM |
786 | /* |
787 | * Called on timeouts and events. Timeouts should pass the elapsed | |
788 | * time, interrupts should pass in zero. Must be called with | |
789 | * si_lock held and interrupts disabled. | |
790 | */ | |
1da177e4 LT |
791 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
792 | int time) | |
793 | { | |
794 | enum si_sm_result si_sm_result; | |
795 | ||
796 | restart: | |
c305e3d3 CM |
797 | /* |
798 | * There used to be a loop here that waited a little while | |
799 | * (around 25us) before giving up. That turned out to be | |
800 | * pointless, the minimum delays I was seeing were in the 300us | |
801 | * range, which is far too long to wait in an interrupt. So | |
802 | * we just run until the state machine tells us something | |
803 | * happened or it needs a delay. | |
804 | */ | |
1da177e4 LT |
805 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
806 | time = 0; | |
807 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 808 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 809 | |
c305e3d3 | 810 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 811 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
812 | |
813 | handle_transaction_done(smi_info); | |
814 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 815 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 816 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 817 | |
c305e3d3 CM |
818 | /* |
819 | * Do the before return_hosed_msg, because that | |
820 | * releases the lock. | |
821 | */ | |
1da177e4 LT |
822 | smi_info->si_state = SI_NORMAL; |
823 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
824 | /* |
825 | * If we were handling a user message, format | |
826 | * a response to send to the upper layer to | |
827 | * tell it about the error. | |
828 | */ | |
4d7cbac7 | 829 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
830 | } |
831 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
832 | } | |
833 | ||
4ea18425 CM |
834 | /* |
835 | * We prefer handling attn over new messages. But don't do | |
836 | * this if there is not yet an upper layer to handle anything. | |
837 | */ | |
c305e3d3 | 838 | if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) { |
1da177e4 LT |
839 | unsigned char msg[2]; |
840 | ||
64959e2d | 841 | smi_inc_stat(smi_info, attentions); |
1da177e4 | 842 | |
c305e3d3 CM |
843 | /* |
844 | * Got a attn, send down a get message flags to see | |
845 | * what's causing it. It would be better to handle | |
846 | * this in the upper layer, but due to the way | |
847 | * interrupts work with the SMI, that's not really | |
848 | * possible. | |
849 | */ | |
1da177e4 LT |
850 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
851 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
852 | ||
853 | smi_info->handlers->start_transaction( | |
854 | smi_info->si_sm, msg, 2); | |
855 | smi_info->si_state = SI_GETTING_FLAGS; | |
856 | goto restart; | |
857 | } | |
858 | ||
859 | /* If we are currently idle, try to start the next message. */ | |
860 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 861 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
862 | |
863 | si_sm_result = start_next_msg(smi_info); | |
864 | if (si_sm_result != SI_SM_IDLE) | |
865 | goto restart; | |
c305e3d3 | 866 | } |
1da177e4 LT |
867 | |
868 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
869 | && (atomic_read(&smi_info->req_events))) { |
870 | /* | |
871 | * We are idle and the upper layer requested that I fetch | |
872 | * events, so do so. | |
873 | */ | |
55162fb1 | 874 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 875 | |
55162fb1 CM |
876 | smi_info->curr_msg = ipmi_alloc_smi_msg(); |
877 | if (!smi_info->curr_msg) | |
878 | goto out; | |
1da177e4 | 879 | |
55162fb1 CM |
880 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
881 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
882 | smi_info->curr_msg->data_size = 2; | |
1da177e4 LT |
883 | |
884 | smi_info->handlers->start_transaction( | |
55162fb1 CM |
885 | smi_info->si_sm, |
886 | smi_info->curr_msg->data, | |
887 | smi_info->curr_msg->data_size); | |
888 | smi_info->si_state = SI_GETTING_EVENTS; | |
1da177e4 LT |
889 | goto restart; |
890 | } | |
55162fb1 | 891 | out: |
1da177e4 LT |
892 | return si_sm_result; |
893 | } | |
894 | ||
89986496 CM |
895 | static void check_start_timer_thread(struct smi_info *smi_info) |
896 | { | |
897 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) { | |
898 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); | |
899 | ||
900 | if (smi_info->thread) | |
901 | wake_up_process(smi_info->thread); | |
902 | ||
903 | start_next_msg(smi_info); | |
904 | smi_event_handler(smi_info, 0); | |
905 | } | |
906 | } | |
907 | ||
1da177e4 LT |
908 | static void sender(void *send_info, |
909 | struct ipmi_smi_msg *msg, | |
910 | int priority) | |
911 | { | |
912 | struct smi_info *smi_info = send_info; | |
913 | enum si_sm_result result; | |
914 | unsigned long flags; | |
915 | #ifdef DEBUG_TIMING | |
916 | struct timeval t; | |
917 | #endif | |
918 | ||
b361e27b CM |
919 | if (atomic_read(&smi_info->stop_operation)) { |
920 | msg->rsp[0] = msg->data[0] | 4; | |
921 | msg->rsp[1] = msg->data[1]; | |
922 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
923 | msg->rsp_size = 3; | |
924 | deliver_recv_msg(smi_info, msg); | |
925 | return; | |
926 | } | |
927 | ||
1da177e4 LT |
928 | #ifdef DEBUG_TIMING |
929 | do_gettimeofday(&t); | |
930 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
931 | #endif | |
932 | ||
933 | if (smi_info->run_to_completion) { | |
bda4c30a CM |
934 | /* |
935 | * If we are running to completion, then throw it in | |
936 | * the list and run transactions until everything is | |
937 | * clear. Priority doesn't matter here. | |
938 | */ | |
939 | ||
940 | /* | |
941 | * Run to completion means we are single-threaded, no | |
942 | * need for locks. | |
943 | */ | |
1da177e4 LT |
944 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); |
945 | ||
1da177e4 LT |
946 | result = smi_event_handler(smi_info, 0); |
947 | while (result != SI_SM_IDLE) { | |
948 | udelay(SI_SHORT_TIMEOUT_USEC); | |
949 | result = smi_event_handler(smi_info, | |
950 | SI_SHORT_TIMEOUT_USEC); | |
951 | } | |
1da177e4 | 952 | return; |
1da177e4 | 953 | } |
1da177e4 | 954 | |
f60adf42 | 955 | spin_lock_irqsave(&smi_info->si_lock, flags); |
bda4c30a CM |
956 | if (priority > 0) |
957 | list_add_tail(&msg->link, &smi_info->hp_xmit_msgs); | |
958 | else | |
959 | list_add_tail(&msg->link, &smi_info->xmit_msgs); | |
bda4c30a | 960 | |
89986496 | 961 | check_start_timer_thread(smi_info); |
bda4c30a | 962 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
963 | } |
964 | ||
7aefac26 | 965 | static void set_run_to_completion(void *send_info, bool i_run_to_completion) |
1da177e4 LT |
966 | { |
967 | struct smi_info *smi_info = send_info; | |
968 | enum si_sm_result result; | |
1da177e4 LT |
969 | |
970 | smi_info->run_to_completion = i_run_to_completion; | |
971 | if (i_run_to_completion) { | |
972 | result = smi_event_handler(smi_info, 0); | |
973 | while (result != SI_SM_IDLE) { | |
974 | udelay(SI_SHORT_TIMEOUT_USEC); | |
975 | result = smi_event_handler(smi_info, | |
976 | SI_SHORT_TIMEOUT_USEC); | |
977 | } | |
978 | } | |
1da177e4 LT |
979 | } |
980 | ||
ae74e823 MW |
981 | /* |
982 | * Use -1 in the nsec value of the busy waiting timespec to tell that | |
983 | * we are spinning in kipmid looking for something and not delaying | |
984 | * between checks | |
985 | */ | |
986 | static inline void ipmi_si_set_not_busy(struct timespec *ts) | |
987 | { | |
988 | ts->tv_nsec = -1; | |
989 | } | |
990 | static inline int ipmi_si_is_busy(struct timespec *ts) | |
991 | { | |
992 | return ts->tv_nsec != -1; | |
993 | } | |
994 | ||
cc4cbe90 AB |
995 | static inline int ipmi_thread_busy_wait(enum si_sm_result smi_result, |
996 | const struct smi_info *smi_info, | |
997 | struct timespec *busy_until) | |
ae74e823 MW |
998 | { |
999 | unsigned int max_busy_us = 0; | |
1000 | ||
1001 | if (smi_info->intf_num < num_max_busy_us) | |
1002 | max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; | |
1003 | if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) | |
1004 | ipmi_si_set_not_busy(busy_until); | |
1005 | else if (!ipmi_si_is_busy(busy_until)) { | |
1006 | getnstimeofday(busy_until); | |
1007 | timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); | |
1008 | } else { | |
1009 | struct timespec now; | |
1010 | getnstimeofday(&now); | |
1011 | if (unlikely(timespec_compare(&now, busy_until) > 0)) { | |
1012 | ipmi_si_set_not_busy(busy_until); | |
1013 | return 0; | |
1014 | } | |
1015 | } | |
1016 | return 1; | |
1017 | } | |
1018 | ||
1019 | ||
1020 | /* | |
1021 | * A busy-waiting loop for speeding up IPMI operation. | |
1022 | * | |
1023 | * Lousy hardware makes this hard. This is only enabled for systems | |
1024 | * that are not BT and do not have interrupts. It starts spinning | |
1025 | * when an operation is complete or until max_busy tells it to stop | |
1026 | * (if that is enabled). See the paragraph on kimid_max_busy_us in | |
1027 | * Documentation/IPMI.txt for details. | |
1028 | */ | |
a9a2c44f CM |
1029 | static int ipmi_thread(void *data) |
1030 | { | |
1031 | struct smi_info *smi_info = data; | |
e9a705a0 | 1032 | unsigned long flags; |
a9a2c44f | 1033 | enum si_sm_result smi_result; |
ae74e823 | 1034 | struct timespec busy_until; |
a9a2c44f | 1035 | |
ae74e823 | 1036 | ipmi_si_set_not_busy(&busy_until); |
8698a745 | 1037 | set_user_nice(current, MAX_NICE); |
e9a705a0 | 1038 | while (!kthread_should_stop()) { |
ae74e823 MW |
1039 | int busy_wait; |
1040 | ||
a9a2c44f | 1041 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 1042 | smi_result = smi_event_handler(smi_info, 0); |
48e8ac29 BS |
1043 | |
1044 | /* | |
1045 | * If the driver is doing something, there is a possible | |
1046 | * race with the timer. If the timer handler see idle, | |
1047 | * and the thread here sees something else, the timer | |
1048 | * handler won't restart the timer even though it is | |
1049 | * required. So start it here if necessary. | |
1050 | */ | |
1051 | if (smi_result != SI_SM_IDLE && !smi_info->timer_running) | |
1052 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); | |
1053 | ||
a9a2c44f | 1054 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
ae74e823 MW |
1055 | busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, |
1056 | &busy_until); | |
c305e3d3 CM |
1057 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
1058 | ; /* do nothing */ | |
ae74e823 | 1059 | else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) |
33979734 | 1060 | schedule(); |
89986496 CM |
1061 | else if (smi_result == SI_SM_IDLE) { |
1062 | if (atomic_read(&smi_info->need_watch)) { | |
1063 | schedule_timeout_interruptible(100); | |
1064 | } else { | |
1065 | /* Wait to be woken up when we are needed. */ | |
1066 | __set_current_state(TASK_INTERRUPTIBLE); | |
1067 | schedule(); | |
1068 | } | |
1069 | } else | |
8d1f66dc | 1070 | schedule_timeout_interruptible(1); |
a9a2c44f | 1071 | } |
a9a2c44f CM |
1072 | return 0; |
1073 | } | |
1074 | ||
1075 | ||
1da177e4 LT |
1076 | static void poll(void *send_info) |
1077 | { | |
1078 | struct smi_info *smi_info = send_info; | |
f60adf42 | 1079 | unsigned long flags = 0; |
7aefac26 | 1080 | bool run_to_completion = smi_info->run_to_completion; |
1da177e4 | 1081 | |
15c62e10 CM |
1082 | /* |
1083 | * Make sure there is some delay in the poll loop so we can | |
1084 | * drive time forward and timeout things. | |
1085 | */ | |
1086 | udelay(10); | |
f60adf42 CM |
1087 | if (!run_to_completion) |
1088 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
15c62e10 | 1089 | smi_event_handler(smi_info, 10); |
f60adf42 CM |
1090 | if (!run_to_completion) |
1091 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1da177e4 LT |
1092 | } |
1093 | ||
1094 | static void request_events(void *send_info) | |
1095 | { | |
1096 | struct smi_info *smi_info = send_info; | |
1097 | ||
40112ae7 CM |
1098 | if (atomic_read(&smi_info->stop_operation) || |
1099 | !smi_info->has_event_buffer) | |
b361e27b CM |
1100 | return; |
1101 | ||
1da177e4 LT |
1102 | atomic_set(&smi_info->req_events, 1); |
1103 | } | |
1104 | ||
7aefac26 | 1105 | static void set_need_watch(void *send_info, bool enable) |
89986496 CM |
1106 | { |
1107 | struct smi_info *smi_info = send_info; | |
1108 | unsigned long flags; | |
1109 | ||
1110 | atomic_set(&smi_info->need_watch, enable); | |
1111 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
1112 | check_start_timer_thread(smi_info); | |
1113 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1114 | } | |
1115 | ||
0c8204b3 | 1116 | static int initialized; |
1da177e4 | 1117 | |
1da177e4 LT |
1118 | static void smi_timeout(unsigned long data) |
1119 | { | |
1120 | struct smi_info *smi_info = (struct smi_info *) data; | |
1121 | enum si_sm_result smi_result; | |
1122 | unsigned long flags; | |
1123 | unsigned long jiffies_now; | |
c4edff1c | 1124 | long time_diff; |
3326f4f2 | 1125 | long timeout; |
1da177e4 LT |
1126 | #ifdef DEBUG_TIMING |
1127 | struct timeval t; | |
1128 | #endif | |
1129 | ||
1da177e4 LT |
1130 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
1131 | #ifdef DEBUG_TIMING | |
1132 | do_gettimeofday(&t); | |
c305e3d3 | 1133 | printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1134 | #endif |
1135 | jiffies_now = jiffies; | |
c4edff1c | 1136 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
1137 | * SI_USEC_PER_JIFFY); |
1138 | smi_result = smi_event_handler(smi_info, time_diff); | |
1139 | ||
b0defcdb | 1140 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 | 1141 | /* Running with interrupts, only do long timeouts. */ |
3326f4f2 | 1142 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
64959e2d | 1143 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1144 | goto do_mod_timer; |
1da177e4 LT |
1145 | } |
1146 | ||
c305e3d3 CM |
1147 | /* |
1148 | * If the state machine asks for a short delay, then shorten | |
1149 | * the timer timeout. | |
1150 | */ | |
1da177e4 | 1151 | if (smi_result == SI_SM_CALL_WITH_DELAY) { |
64959e2d | 1152 | smi_inc_stat(smi_info, short_timeouts); |
3326f4f2 | 1153 | timeout = jiffies + 1; |
1da177e4 | 1154 | } else { |
64959e2d | 1155 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1156 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1157 | } |
1158 | ||
3326f4f2 MG |
1159 | do_mod_timer: |
1160 | if (smi_result != SI_SM_IDLE) | |
48e8ac29 BS |
1161 | smi_mod_timer(smi_info, timeout); |
1162 | else | |
1163 | smi_info->timer_running = false; | |
1164 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1da177e4 LT |
1165 | } |
1166 | ||
7d12e780 | 1167 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
1168 | { |
1169 | struct smi_info *smi_info = data; | |
1170 | unsigned long flags; | |
1171 | #ifdef DEBUG_TIMING | |
1172 | struct timeval t; | |
1173 | #endif | |
1174 | ||
1175 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1176 | ||
64959e2d | 1177 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1178 | |
1da177e4 LT |
1179 | #ifdef DEBUG_TIMING |
1180 | do_gettimeofday(&t); | |
c305e3d3 | 1181 | printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1182 | #endif |
1183 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1184 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1185 | return IRQ_HANDLED; | |
1186 | } | |
1187 | ||
7d12e780 | 1188 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
1189 | { |
1190 | struct smi_info *smi_info = data; | |
1191 | /* We need to clear the IRQ flag for the BT interface. */ | |
1192 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1193 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1194 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 1195 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
1196 | } |
1197 | ||
453823ba CM |
1198 | static int smi_start_processing(void *send_info, |
1199 | ipmi_smi_t intf) | |
1200 | { | |
1201 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1202 | int enable = 0; |
453823ba CM |
1203 | |
1204 | new_smi->intf = intf; | |
1205 | ||
c45adc39 CM |
1206 | /* Try to claim any interrupts. */ |
1207 | if (new_smi->irq_setup) | |
1208 | new_smi->irq_setup(new_smi); | |
1209 | ||
453823ba CM |
1210 | /* Set up the timer that drives the interface. */ |
1211 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
48e8ac29 | 1212 | smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES); |
453823ba | 1213 | |
a51f4a81 CM |
1214 | /* |
1215 | * Check if the user forcefully enabled the daemon. | |
1216 | */ | |
1217 | if (new_smi->intf_num < num_force_kipmid) | |
1218 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1219 | /* |
1220 | * The BT interface is efficient enough to not need a thread, | |
1221 | * and there is no need for a thread if we have interrupts. | |
1222 | */ | |
c305e3d3 | 1223 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
a51f4a81 CM |
1224 | enable = 1; |
1225 | ||
1226 | if (enable) { | |
453823ba CM |
1227 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1228 | "kipmi%d", new_smi->intf_num); | |
1229 | if (IS_ERR(new_smi->thread)) { | |
279fbd0c MS |
1230 | dev_notice(new_smi->dev, "Could not start" |
1231 | " kernel thread due to error %ld, only using" | |
1232 | " timers to drive the interface\n", | |
1233 | PTR_ERR(new_smi->thread)); | |
453823ba CM |
1234 | new_smi->thread = NULL; |
1235 | } | |
1236 | } | |
1237 | ||
1238 | return 0; | |
1239 | } | |
9dbf68f9 | 1240 | |
16f4232c ZY |
1241 | static int get_smi_info(void *send_info, struct ipmi_smi_info *data) |
1242 | { | |
1243 | struct smi_info *smi = send_info; | |
1244 | ||
1245 | data->addr_src = smi->addr_source; | |
1246 | data->dev = smi->dev; | |
1247 | data->addr_info = smi->addr_info; | |
1248 | get_device(smi->dev); | |
1249 | ||
1250 | return 0; | |
1251 | } | |
1252 | ||
7aefac26 | 1253 | static void set_maintenance_mode(void *send_info, bool enable) |
b9675136 CM |
1254 | { |
1255 | struct smi_info *smi_info = send_info; | |
1256 | ||
1257 | if (!enable) | |
1258 | atomic_set(&smi_info->req_events, 0); | |
1259 | } | |
1260 | ||
c305e3d3 | 1261 | static struct ipmi_smi_handlers handlers = { |
1da177e4 | 1262 | .owner = THIS_MODULE, |
453823ba | 1263 | .start_processing = smi_start_processing, |
16f4232c | 1264 | .get_smi_info = get_smi_info, |
1da177e4 LT |
1265 | .sender = sender, |
1266 | .request_events = request_events, | |
89986496 | 1267 | .set_need_watch = set_need_watch, |
b9675136 | 1268 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
1269 | .set_run_to_completion = set_run_to_completion, |
1270 | .poll = poll, | |
1271 | }; | |
1272 | ||
c305e3d3 CM |
1273 | /* |
1274 | * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1275 | * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. | |
1276 | */ | |
1da177e4 | 1277 | |
b0defcdb | 1278 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1279 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1280 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1281 | |
1da177e4 | 1282 | #define DEFAULT_REGSPACING 1 |
dba9b4f6 | 1283 | #define DEFAULT_REGSIZE 1 |
1da177e4 | 1284 | |
d941aeae CM |
1285 | #ifdef CONFIG_ACPI |
1286 | static bool si_tryacpi = 1; | |
1287 | #endif | |
1288 | #ifdef CONFIG_DMI | |
1289 | static bool si_trydmi = 1; | |
1290 | #endif | |
f2afae46 CM |
1291 | static bool si_tryplatform = 1; |
1292 | #ifdef CONFIG_PCI | |
1293 | static bool si_trypci = 1; | |
1294 | #endif | |
0dfe6e7e | 1295 | static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS); |
1da177e4 LT |
1296 | static char *si_type[SI_MAX_PARMS]; |
1297 | #define MAX_SI_TYPE_STR 30 | |
1298 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1299 | static unsigned long addrs[SI_MAX_PARMS]; | |
64a6f950 | 1300 | static unsigned int num_addrs; |
1da177e4 | 1301 | static unsigned int ports[SI_MAX_PARMS]; |
64a6f950 | 1302 | static unsigned int num_ports; |
1da177e4 | 1303 | static int irqs[SI_MAX_PARMS]; |
64a6f950 | 1304 | static unsigned int num_irqs; |
1da177e4 | 1305 | static int regspacings[SI_MAX_PARMS]; |
64a6f950 | 1306 | static unsigned int num_regspacings; |
1da177e4 | 1307 | static int regsizes[SI_MAX_PARMS]; |
64a6f950 | 1308 | static unsigned int num_regsizes; |
1da177e4 | 1309 | static int regshifts[SI_MAX_PARMS]; |
64a6f950 | 1310 | static unsigned int num_regshifts; |
2f95d513 | 1311 | static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ |
64a6f950 | 1312 | static unsigned int num_slave_addrs; |
1da177e4 | 1313 | |
b361e27b CM |
1314 | #define IPMI_IO_ADDR_SPACE 0 |
1315 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1316 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1317 | |
1318 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1319 | ||
1320 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1321 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1322 | " Documentation/IPMI.txt in the kernel sources for the" | |
1323 | " gory details."); | |
1da177e4 | 1324 | |
d941aeae CM |
1325 | #ifdef CONFIG_ACPI |
1326 | module_param_named(tryacpi, si_tryacpi, bool, 0); | |
1327 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1328 | " default scan of the interfaces identified via ACPI"); | |
1329 | #endif | |
1330 | #ifdef CONFIG_DMI | |
1331 | module_param_named(trydmi, si_trydmi, bool, 0); | |
1332 | MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the" | |
1333 | " default scan of the interfaces identified via DMI"); | |
1334 | #endif | |
f2afae46 CM |
1335 | module_param_named(tryplatform, si_tryplatform, bool, 0); |
1336 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1337 | " default scan of the interfaces identified via platform" | |
1338 | " interfaces like openfirmware"); | |
1339 | #ifdef CONFIG_PCI | |
1340 | module_param_named(trypci, si_trypci, bool, 0); | |
1341 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1342 | " default scan of the interfaces identified via pci"); | |
1343 | #endif | |
1da177e4 LT |
1344 | module_param_named(trydefaults, si_trydefaults, bool, 0); |
1345 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1346 | " default scan of the KCS and SMIC interface at the standard" | |
1347 | " address"); | |
1348 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1349 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1350 | " interface separated by commas. The types are 'kcs'," | |
1351 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1352 | " the first interface to kcs and the second to bt"); | |
64a6f950 | 1353 | module_param_array(addrs, ulong, &num_addrs, 0); |
1da177e4 LT |
1354 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" |
1355 | " addresses separated by commas. Only use if an interface" | |
1356 | " is in memory. Otherwise, set it to zero or leave" | |
1357 | " it blank."); | |
64a6f950 | 1358 | module_param_array(ports, uint, &num_ports, 0); |
1da177e4 LT |
1359 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" |
1360 | " addresses separated by commas. Only use if an interface" | |
1361 | " is a port. Otherwise, set it to zero or leave" | |
1362 | " it blank."); | |
1363 | module_param_array(irqs, int, &num_irqs, 0); | |
1364 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1365 | " addresses separated by commas. Only use if an interface" | |
1366 | " has an interrupt. Otherwise, set it to zero or leave" | |
1367 | " it blank."); | |
1368 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1369 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1370 | " and each successive register used by the interface. For" | |
1371 | " instance, if the start address is 0xca2 and the spacing" | |
1372 | " is 2, then the second address is at 0xca4. Defaults" | |
1373 | " to 1."); | |
1374 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1375 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1376 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1377 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1378 | " the 8-bit IPMI register has to be read from a larger" | |
1379 | " register."); | |
1380 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1381 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1382 | " IPMI register, in bits. For instance, if the data" | |
1383 | " is read from a 32-bit word and the IPMI data is in" | |
1384 | " bit 8-15, then the shift would be 8"); | |
1385 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1386 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1387 | " the controller. Normally this is 0x20, but can be" | |
1388 | " overridden by this parm. This is an array indexed" | |
1389 | " by interface number."); | |
a51f4a81 CM |
1390 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1391 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1392 | " disabled(0). Normally the IPMI driver auto-detects" | |
1393 | " this, but the value may be overridden by this parm."); | |
7aefac26 | 1394 | module_param(unload_when_empty, bool, 0); |
b361e27b CM |
1395 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" |
1396 | " specified or found, default is 1. Setting to 0" | |
1397 | " is useful for hot add of devices using hotmod."); | |
ae74e823 MW |
1398 | module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); |
1399 | MODULE_PARM_DESC(kipmid_max_busy_us, | |
1400 | "Max time (in microseconds) to busy-wait for IPMI data before" | |
1401 | " sleeping. 0 (default) means to wait forever. Set to 100-500" | |
1402 | " if kipmid is using up a lot of CPU time."); | |
1da177e4 LT |
1403 | |
1404 | ||
b0defcdb | 1405 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1406 | { |
b0defcdb CM |
1407 | if (info->si_type == SI_BT) |
1408 | /* Disable the interrupt in the BT interface. */ | |
1409 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1410 | free_irq(info->irq, info); | |
1da177e4 | 1411 | } |
1da177e4 LT |
1412 | |
1413 | static int std_irq_setup(struct smi_info *info) | |
1414 | { | |
1415 | int rv; | |
1416 | ||
b0defcdb | 1417 | if (!info->irq) |
1da177e4 LT |
1418 | return 0; |
1419 | ||
9dbf68f9 CM |
1420 | if (info->si_type == SI_BT) { |
1421 | rv = request_irq(info->irq, | |
1422 | si_bt_irq_handler, | |
aa5b2bab | 1423 | IRQF_SHARED, |
9dbf68f9 CM |
1424 | DEVICE_NAME, |
1425 | info); | |
b0defcdb | 1426 | if (!rv) |
9dbf68f9 CM |
1427 | /* Enable the interrupt in the BT interface. */ |
1428 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1429 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1430 | } else | |
1431 | rv = request_irq(info->irq, | |
1432 | si_irq_handler, | |
aa5b2bab | 1433 | IRQF_SHARED, |
9dbf68f9 CM |
1434 | DEVICE_NAME, |
1435 | info); | |
1da177e4 | 1436 | if (rv) { |
279fbd0c MS |
1437 | dev_warn(info->dev, "%s unable to claim interrupt %d," |
1438 | " running polled\n", | |
1439 | DEVICE_NAME, info->irq); | |
1da177e4 LT |
1440 | info->irq = 0; |
1441 | } else { | |
b0defcdb | 1442 | info->irq_cleanup = std_irq_cleanup; |
279fbd0c | 1443 | dev_info(info->dev, "Using irq %d\n", info->irq); |
1da177e4 LT |
1444 | } |
1445 | ||
1446 | return rv; | |
1447 | } | |
1448 | ||
1da177e4 LT |
1449 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1450 | { | |
b0defcdb | 1451 | unsigned int addr = io->addr_data; |
1da177e4 | 1452 | |
b0defcdb | 1453 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1454 | } |
1455 | ||
1456 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1457 | unsigned char b) | |
1458 | { | |
b0defcdb | 1459 | unsigned int addr = io->addr_data; |
1da177e4 | 1460 | |
b0defcdb | 1461 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1462 | } |
1463 | ||
1464 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1465 | { | |
b0defcdb | 1466 | unsigned int addr = io->addr_data; |
1da177e4 | 1467 | |
b0defcdb | 1468 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1469 | } |
1470 | ||
1471 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1472 | unsigned char b) | |
1473 | { | |
b0defcdb | 1474 | unsigned int addr = io->addr_data; |
1da177e4 | 1475 | |
b0defcdb | 1476 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1477 | } |
1478 | ||
1479 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1480 | { | |
b0defcdb | 1481 | unsigned int addr = io->addr_data; |
1da177e4 | 1482 | |
b0defcdb | 1483 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1484 | } |
1485 | ||
1486 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1487 | unsigned char b) | |
1488 | { | |
b0defcdb | 1489 | unsigned int addr = io->addr_data; |
1da177e4 | 1490 | |
b0defcdb | 1491 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1492 | } |
1493 | ||
1494 | static void port_cleanup(struct smi_info *info) | |
1495 | { | |
b0defcdb | 1496 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1497 | int idx; |
1da177e4 | 1498 | |
b0defcdb | 1499 | if (addr) { |
c305e3d3 | 1500 | for (idx = 0; idx < info->io_size; idx++) |
d61a3ead CM |
1501 | release_region(addr + idx * info->io.regspacing, |
1502 | info->io.regsize); | |
1da177e4 | 1503 | } |
1da177e4 LT |
1504 | } |
1505 | ||
1506 | static int port_setup(struct smi_info *info) | |
1507 | { | |
b0defcdb | 1508 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1509 | int idx; |
1da177e4 | 1510 | |
b0defcdb | 1511 | if (!addr) |
1da177e4 LT |
1512 | return -ENODEV; |
1513 | ||
1514 | info->io_cleanup = port_cleanup; | |
1515 | ||
c305e3d3 CM |
1516 | /* |
1517 | * Figure out the actual inb/inw/inl/etc routine to use based | |
1518 | * upon the register size. | |
1519 | */ | |
1da177e4 LT |
1520 | switch (info->io.regsize) { |
1521 | case 1: | |
1522 | info->io.inputb = port_inb; | |
1523 | info->io.outputb = port_outb; | |
1524 | break; | |
1525 | case 2: | |
1526 | info->io.inputb = port_inw; | |
1527 | info->io.outputb = port_outw; | |
1528 | break; | |
1529 | case 4: | |
1530 | info->io.inputb = port_inl; | |
1531 | info->io.outputb = port_outl; | |
1532 | break; | |
1533 | default: | |
279fbd0c MS |
1534 | dev_warn(info->dev, "Invalid register size: %d\n", |
1535 | info->io.regsize); | |
1da177e4 LT |
1536 | return -EINVAL; |
1537 | } | |
1538 | ||
c305e3d3 CM |
1539 | /* |
1540 | * Some BIOSes reserve disjoint I/O regions in their ACPI | |
d61a3ead CM |
1541 | * tables. This causes problems when trying to register the |
1542 | * entire I/O region. Therefore we must register each I/O | |
1543 | * port separately. | |
1544 | */ | |
c305e3d3 | 1545 | for (idx = 0; idx < info->io_size; idx++) { |
d61a3ead CM |
1546 | if (request_region(addr + idx * info->io.regspacing, |
1547 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1548 | /* Undo allocations */ | |
1549 | while (idx--) { | |
1550 | release_region(addr + idx * info->io.regspacing, | |
1551 | info->io.regsize); | |
1552 | } | |
1553 | return -EIO; | |
1554 | } | |
1555 | } | |
1da177e4 LT |
1556 | return 0; |
1557 | } | |
1558 | ||
546cfdf4 | 1559 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1560 | { |
1561 | return readb((io->addr)+(offset * io->regspacing)); | |
1562 | } | |
1563 | ||
546cfdf4 | 1564 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1565 | unsigned char b) |
1566 | { | |
1567 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1568 | } | |
1569 | ||
546cfdf4 | 1570 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1571 | { |
1572 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1573 | & 0xff; |
1da177e4 LT |
1574 | } |
1575 | ||
546cfdf4 | 1576 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1577 | unsigned char b) |
1578 | { | |
1579 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1580 | } | |
1581 | ||
546cfdf4 | 1582 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1583 | { |
1584 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1585 | & 0xff; |
1da177e4 LT |
1586 | } |
1587 | ||
546cfdf4 | 1588 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1589 | unsigned char b) |
1590 | { | |
1591 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1592 | } | |
1593 | ||
1594 | #ifdef readq | |
1595 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1596 | { | |
1597 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1598 | & 0xff; |
1da177e4 LT |
1599 | } |
1600 | ||
1601 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1602 | unsigned char b) | |
1603 | { | |
1604 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1605 | } | |
1606 | #endif | |
1607 | ||
1608 | static void mem_cleanup(struct smi_info *info) | |
1609 | { | |
b0defcdb | 1610 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1611 | int mapsize; |
1612 | ||
1613 | if (info->io.addr) { | |
1614 | iounmap(info->io.addr); | |
1615 | ||
1616 | mapsize = ((info->io_size * info->io.regspacing) | |
1617 | - (info->io.regspacing - info->io.regsize)); | |
1618 | ||
b0defcdb | 1619 | release_mem_region(addr, mapsize); |
1da177e4 | 1620 | } |
1da177e4 LT |
1621 | } |
1622 | ||
1623 | static int mem_setup(struct smi_info *info) | |
1624 | { | |
b0defcdb | 1625 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1626 | int mapsize; |
1627 | ||
b0defcdb | 1628 | if (!addr) |
1da177e4 LT |
1629 | return -ENODEV; |
1630 | ||
1631 | info->io_cleanup = mem_cleanup; | |
1632 | ||
c305e3d3 CM |
1633 | /* |
1634 | * Figure out the actual readb/readw/readl/etc routine to use based | |
1635 | * upon the register size. | |
1636 | */ | |
1da177e4 LT |
1637 | switch (info->io.regsize) { |
1638 | case 1: | |
546cfdf4 AD |
1639 | info->io.inputb = intf_mem_inb; |
1640 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1641 | break; |
1642 | case 2: | |
546cfdf4 AD |
1643 | info->io.inputb = intf_mem_inw; |
1644 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1645 | break; |
1646 | case 4: | |
546cfdf4 AD |
1647 | info->io.inputb = intf_mem_inl; |
1648 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1649 | break; |
1650 | #ifdef readq | |
1651 | case 8: | |
1652 | info->io.inputb = mem_inq; | |
1653 | info->io.outputb = mem_outq; | |
1654 | break; | |
1655 | #endif | |
1656 | default: | |
279fbd0c MS |
1657 | dev_warn(info->dev, "Invalid register size: %d\n", |
1658 | info->io.regsize); | |
1da177e4 LT |
1659 | return -EINVAL; |
1660 | } | |
1661 | ||
c305e3d3 CM |
1662 | /* |
1663 | * Calculate the total amount of memory to claim. This is an | |
1da177e4 LT |
1664 | * unusual looking calculation, but it avoids claiming any |
1665 | * more memory than it has to. It will claim everything | |
1666 | * between the first address to the end of the last full | |
c305e3d3 CM |
1667 | * register. |
1668 | */ | |
1da177e4 LT |
1669 | mapsize = ((info->io_size * info->io.regspacing) |
1670 | - (info->io.regspacing - info->io.regsize)); | |
1671 | ||
b0defcdb | 1672 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1673 | return -EIO; |
1674 | ||
b0defcdb | 1675 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1676 | if (info->io.addr == NULL) { |
b0defcdb | 1677 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1678 | return -EIO; |
1679 | } | |
1680 | return 0; | |
1681 | } | |
1682 | ||
b361e27b CM |
1683 | /* |
1684 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1685 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1686 | * Options are: | |
1687 | * rsp=<regspacing> | |
1688 | * rsi=<regsize> | |
1689 | * rsh=<regshift> | |
1690 | * irq=<irq> | |
1691 | * ipmb=<ipmb addr> | |
1692 | */ | |
1693 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1694 | struct hotmod_vals { | |
1695 | char *name; | |
1696 | int val; | |
1697 | }; | |
1698 | static struct hotmod_vals hotmod_ops[] = { | |
1699 | { "add", HM_ADD }, | |
1700 | { "remove", HM_REMOVE }, | |
1701 | { NULL } | |
1702 | }; | |
1703 | static struct hotmod_vals hotmod_si[] = { | |
1704 | { "kcs", SI_KCS }, | |
1705 | { "smic", SI_SMIC }, | |
1706 | { "bt", SI_BT }, | |
1707 | { NULL } | |
1708 | }; | |
1709 | static struct hotmod_vals hotmod_as[] = { | |
1710 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1711 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1712 | { NULL } | |
1713 | }; | |
1d5636cc | 1714 | |
b361e27b CM |
1715 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1716 | { | |
1717 | char *s; | |
1718 | int i; | |
1719 | ||
1720 | s = strchr(*curr, ','); | |
1721 | if (!s) { | |
1722 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1723 | return -EINVAL; | |
1724 | } | |
1725 | *s = '\0'; | |
1726 | s++; | |
ceb51ca8 | 1727 | for (i = 0; v[i].name; i++) { |
1d5636cc | 1728 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1729 | *val = v[i].val; |
1730 | *curr = s; | |
1731 | return 0; | |
1732 | } | |
1733 | } | |
1734 | ||
1735 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1736 | return -EINVAL; | |
1737 | } | |
1738 | ||
1d5636cc CM |
1739 | static int check_hotmod_int_op(const char *curr, const char *option, |
1740 | const char *name, int *val) | |
1741 | { | |
1742 | char *n; | |
1743 | ||
1744 | if (strcmp(curr, name) == 0) { | |
1745 | if (!option) { | |
1746 | printk(KERN_WARNING PFX | |
1747 | "No option given for '%s'\n", | |
1748 | curr); | |
1749 | return -EINVAL; | |
1750 | } | |
1751 | *val = simple_strtoul(option, &n, 0); | |
1752 | if ((*n != '\0') || (*option == '\0')) { | |
1753 | printk(KERN_WARNING PFX | |
1754 | "Bad option given for '%s'\n", | |
1755 | curr); | |
1756 | return -EINVAL; | |
1757 | } | |
1758 | return 1; | |
1759 | } | |
1760 | return 0; | |
1761 | } | |
1762 | ||
de5e2ddf ED |
1763 | static struct smi_info *smi_info_alloc(void) |
1764 | { | |
1765 | struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1766 | ||
f60adf42 | 1767 | if (info) |
de5e2ddf | 1768 | spin_lock_init(&info->si_lock); |
de5e2ddf ED |
1769 | return info; |
1770 | } | |
1771 | ||
b361e27b CM |
1772 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1773 | { | |
1774 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1775 | int rv; |
b361e27b CM |
1776 | char *next, *curr, *s, *n, *o; |
1777 | enum hotmod_op op; | |
1778 | enum si_type si_type; | |
1779 | int addr_space; | |
1780 | unsigned long addr; | |
1781 | int regspacing; | |
1782 | int regsize; | |
1783 | int regshift; | |
1784 | int irq; | |
1785 | int ipmb; | |
1786 | int ival; | |
1d5636cc | 1787 | int len; |
b361e27b CM |
1788 | struct smi_info *info; |
1789 | ||
1790 | if (!str) | |
1791 | return -ENOMEM; | |
1792 | ||
1793 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1794 | len = strlen(str); |
1795 | ival = len - 1; | |
b361e27b CM |
1796 | while ((ival >= 0) && isspace(str[ival])) { |
1797 | str[ival] = '\0'; | |
1798 | ival--; | |
1799 | } | |
1800 | ||
1801 | for (curr = str; curr; curr = next) { | |
1802 | regspacing = 1; | |
1803 | regsize = 1; | |
1804 | regshift = 0; | |
1805 | irq = 0; | |
2f95d513 | 1806 | ipmb = 0; /* Choose the default if not specified */ |
b361e27b CM |
1807 | |
1808 | next = strchr(curr, ':'); | |
1809 | if (next) { | |
1810 | *next = '\0'; | |
1811 | next++; | |
1812 | } | |
1813 | ||
1814 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1815 | if (rv) | |
1816 | break; | |
1817 | op = ival; | |
1818 | ||
1819 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1820 | if (rv) | |
1821 | break; | |
1822 | si_type = ival; | |
1823 | ||
1824 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1825 | if (rv) | |
1826 | break; | |
1827 | ||
1828 | s = strchr(curr, ','); | |
1829 | if (s) { | |
1830 | *s = '\0'; | |
1831 | s++; | |
1832 | } | |
1833 | addr = simple_strtoul(curr, &n, 0); | |
1834 | if ((*n != '\0') || (*curr == '\0')) { | |
1835 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1836 | " '%s'\n", curr); | |
1837 | break; | |
1838 | } | |
1839 | ||
1840 | while (s) { | |
1841 | curr = s; | |
1842 | s = strchr(curr, ','); | |
1843 | if (s) { | |
1844 | *s = '\0'; | |
1845 | s++; | |
1846 | } | |
1847 | o = strchr(curr, '='); | |
1848 | if (o) { | |
1849 | *o = '\0'; | |
1850 | o++; | |
1851 | } | |
1d5636cc CM |
1852 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1853 | if (rv < 0) | |
b361e27b | 1854 | goto out; |
1d5636cc CM |
1855 | else if (rv) |
1856 | continue; | |
1857 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1858 | if (rv < 0) | |
1859 | goto out; | |
1860 | else if (rv) | |
1861 | continue; | |
1862 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1863 | if (rv < 0) | |
1864 | goto out; | |
1865 | else if (rv) | |
1866 | continue; | |
1867 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1868 | if (rv < 0) | |
1869 | goto out; | |
1870 | else if (rv) | |
1871 | continue; | |
1872 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1873 | if (rv < 0) | |
1874 | goto out; | |
1875 | else if (rv) | |
1876 | continue; | |
1877 | ||
1878 | rv = -EINVAL; | |
1879 | printk(KERN_WARNING PFX | |
1880 | "Invalid hotmod option '%s'\n", | |
1881 | curr); | |
1882 | goto out; | |
b361e27b CM |
1883 | } |
1884 | ||
1885 | if (op == HM_ADD) { | |
de5e2ddf | 1886 | info = smi_info_alloc(); |
b361e27b CM |
1887 | if (!info) { |
1888 | rv = -ENOMEM; | |
1889 | goto out; | |
1890 | } | |
1891 | ||
5fedc4a2 | 1892 | info->addr_source = SI_HOTMOD; |
b361e27b CM |
1893 | info->si_type = si_type; |
1894 | info->io.addr_data = addr; | |
1895 | info->io.addr_type = addr_space; | |
1896 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1897 | info->io_setup = mem_setup; | |
1898 | else | |
1899 | info->io_setup = port_setup; | |
1900 | ||
1901 | info->io.addr = NULL; | |
1902 | info->io.regspacing = regspacing; | |
1903 | if (!info->io.regspacing) | |
1904 | info->io.regspacing = DEFAULT_REGSPACING; | |
1905 | info->io.regsize = regsize; | |
1906 | if (!info->io.regsize) | |
1907 | info->io.regsize = DEFAULT_REGSPACING; | |
1908 | info->io.regshift = regshift; | |
1909 | info->irq = irq; | |
1910 | if (info->irq) | |
1911 | info->irq_setup = std_irq_setup; | |
1912 | info->slave_addr = ipmb; | |
1913 | ||
d02b3709 CM |
1914 | rv = add_smi(info); |
1915 | if (rv) { | |
7faefea6 | 1916 | kfree(info); |
d02b3709 CM |
1917 | goto out; |
1918 | } | |
1919 | rv = try_smi_init(info); | |
1920 | if (rv) { | |
1921 | cleanup_one_si(info); | |
1922 | goto out; | |
7faefea6 | 1923 | } |
b361e27b CM |
1924 | } else { |
1925 | /* remove */ | |
1926 | struct smi_info *e, *tmp_e; | |
1927 | ||
1928 | mutex_lock(&smi_infos_lock); | |
1929 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1930 | if (e->io.addr_type != addr_space) | |
1931 | continue; | |
1932 | if (e->si_type != si_type) | |
1933 | continue; | |
1934 | if (e->io.addr_data == addr) | |
1935 | cleanup_one_si(e); | |
1936 | } | |
1937 | mutex_unlock(&smi_infos_lock); | |
1938 | } | |
1939 | } | |
1d5636cc | 1940 | rv = len; |
b361e27b CM |
1941 | out: |
1942 | kfree(str); | |
1943 | return rv; | |
1944 | } | |
b0defcdb | 1945 | |
2223cbec | 1946 | static int hardcode_find_bmc(void) |
1da177e4 | 1947 | { |
a1e9c9dd | 1948 | int ret = -ENODEV; |
b0defcdb | 1949 | int i; |
1da177e4 LT |
1950 | struct smi_info *info; |
1951 | ||
b0defcdb CM |
1952 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1953 | if (!ports[i] && !addrs[i]) | |
1954 | continue; | |
1da177e4 | 1955 | |
de5e2ddf | 1956 | info = smi_info_alloc(); |
b0defcdb | 1957 | if (!info) |
a1e9c9dd | 1958 | return -ENOMEM; |
1da177e4 | 1959 | |
5fedc4a2 | 1960 | info->addr_source = SI_HARDCODED; |
279fbd0c | 1961 | printk(KERN_INFO PFX "probing via hardcoded address\n"); |
1da177e4 | 1962 | |
1d5636cc | 1963 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1964 | info->si_type = SI_KCS; |
1d5636cc | 1965 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1966 | info->si_type = SI_SMIC; |
1d5636cc | 1967 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1968 | info->si_type = SI_BT; |
1969 | } else { | |
279fbd0c | 1970 | printk(KERN_WARNING PFX "Interface type specified " |
b0defcdb CM |
1971 | "for interface %d, was invalid: %s\n", |
1972 | i, si_type[i]); | |
1973 | kfree(info); | |
1974 | continue; | |
1975 | } | |
1da177e4 | 1976 | |
b0defcdb CM |
1977 | if (ports[i]) { |
1978 | /* An I/O port */ | |
1979 | info->io_setup = port_setup; | |
1980 | info->io.addr_data = ports[i]; | |
1981 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1982 | } else if (addrs[i]) { | |
1983 | /* A memory port */ | |
1984 | info->io_setup = mem_setup; | |
1985 | info->io.addr_data = addrs[i]; | |
1986 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1987 | } else { | |
279fbd0c MS |
1988 | printk(KERN_WARNING PFX "Interface type specified " |
1989 | "for interface %d, but port and address were " | |
1990 | "not set or set to zero.\n", i); | |
b0defcdb CM |
1991 | kfree(info); |
1992 | continue; | |
1993 | } | |
1da177e4 | 1994 | |
b0defcdb CM |
1995 | info->io.addr = NULL; |
1996 | info->io.regspacing = regspacings[i]; | |
1997 | if (!info->io.regspacing) | |
1998 | info->io.regspacing = DEFAULT_REGSPACING; | |
1999 | info->io.regsize = regsizes[i]; | |
2000 | if (!info->io.regsize) | |
2001 | info->io.regsize = DEFAULT_REGSPACING; | |
2002 | info->io.regshift = regshifts[i]; | |
2003 | info->irq = irqs[i]; | |
2004 | if (info->irq) | |
2005 | info->irq_setup = std_irq_setup; | |
2f95d513 | 2006 | info->slave_addr = slave_addrs[i]; |
1da177e4 | 2007 | |
7faefea6 | 2008 | if (!add_smi(info)) { |
2407d77a MG |
2009 | if (try_smi_init(info)) |
2010 | cleanup_one_si(info); | |
a1e9c9dd | 2011 | ret = 0; |
7faefea6 YL |
2012 | } else { |
2013 | kfree(info); | |
2014 | } | |
b0defcdb | 2015 | } |
a1e9c9dd | 2016 | return ret; |
b0defcdb | 2017 | } |
1da177e4 | 2018 | |
8466361a | 2019 | #ifdef CONFIG_ACPI |
1da177e4 LT |
2020 | |
2021 | #include <linux/acpi.h> | |
2022 | ||
c305e3d3 CM |
2023 | /* |
2024 | * Once we get an ACPI failure, we don't try any more, because we go | |
2025 | * through the tables sequentially. Once we don't find a table, there | |
2026 | * are no more. | |
2027 | */ | |
0c8204b3 | 2028 | static int acpi_failure; |
1da177e4 LT |
2029 | |
2030 | /* For GPE-type interrupts. */ | |
8b6cd8ad LM |
2031 | static u32 ipmi_acpi_gpe(acpi_handle gpe_device, |
2032 | u32 gpe_number, void *context) | |
1da177e4 LT |
2033 | { |
2034 | struct smi_info *smi_info = context; | |
2035 | unsigned long flags; | |
2036 | #ifdef DEBUG_TIMING | |
2037 | struct timeval t; | |
2038 | #endif | |
2039 | ||
2040 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
2041 | ||
64959e2d | 2042 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 2043 | |
1da177e4 LT |
2044 | #ifdef DEBUG_TIMING |
2045 | do_gettimeofday(&t); | |
2046 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
2047 | #endif | |
2048 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
2049 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
2050 | ||
2051 | return ACPI_INTERRUPT_HANDLED; | |
2052 | } | |
2053 | ||
b0defcdb CM |
2054 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
2055 | { | |
2056 | if (!info->irq) | |
2057 | return; | |
2058 | ||
2059 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
2060 | } | |
2061 | ||
1da177e4 LT |
2062 | static int acpi_gpe_irq_setup(struct smi_info *info) |
2063 | { | |
2064 | acpi_status status; | |
2065 | ||
b0defcdb | 2066 | if (!info->irq) |
1da177e4 LT |
2067 | return 0; |
2068 | ||
2069 | /* FIXME - is level triggered right? */ | |
2070 | status = acpi_install_gpe_handler(NULL, | |
2071 | info->irq, | |
2072 | ACPI_GPE_LEVEL_TRIGGERED, | |
2073 | &ipmi_acpi_gpe, | |
2074 | info); | |
2075 | if (status != AE_OK) { | |
279fbd0c MS |
2076 | dev_warn(info->dev, "%s unable to claim ACPI GPE %d," |
2077 | " running polled\n", DEVICE_NAME, info->irq); | |
1da177e4 LT |
2078 | info->irq = 0; |
2079 | return -EINVAL; | |
2080 | } else { | |
b0defcdb | 2081 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
279fbd0c | 2082 | dev_info(info->dev, "Using ACPI GPE %d\n", info->irq); |
1da177e4 LT |
2083 | return 0; |
2084 | } | |
2085 | } | |
2086 | ||
1da177e4 LT |
2087 | /* |
2088 | * Defined at | |
631dd1a8 | 2089 | * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf |
1da177e4 LT |
2090 | */ |
2091 | struct SPMITable { | |
2092 | s8 Signature[4]; | |
2093 | u32 Length; | |
2094 | u8 Revision; | |
2095 | u8 Checksum; | |
2096 | s8 OEMID[6]; | |
2097 | s8 OEMTableID[8]; | |
2098 | s8 OEMRevision[4]; | |
2099 | s8 CreatorID[4]; | |
2100 | s8 CreatorRevision[4]; | |
2101 | u8 InterfaceType; | |
2102 | u8 IPMIlegacy; | |
2103 | s16 SpecificationRevision; | |
2104 | ||
2105 | /* | |
2106 | * Bit 0 - SCI interrupt supported | |
2107 | * Bit 1 - I/O APIC/SAPIC | |
2108 | */ | |
2109 | u8 InterruptType; | |
2110 | ||
c305e3d3 CM |
2111 | /* |
2112 | * If bit 0 of InterruptType is set, then this is the SCI | |
2113 | * interrupt in the GPEx_STS register. | |
2114 | */ | |
1da177e4 LT |
2115 | u8 GPE; |
2116 | ||
2117 | s16 Reserved; | |
2118 | ||
c305e3d3 CM |
2119 | /* |
2120 | * If bit 1 of InterruptType is set, then this is the I/O | |
2121 | * APIC/SAPIC interrupt. | |
2122 | */ | |
1da177e4 LT |
2123 | u32 GlobalSystemInterrupt; |
2124 | ||
2125 | /* The actual register address. */ | |
2126 | struct acpi_generic_address addr; | |
2127 | ||
2128 | u8 UID[4]; | |
2129 | ||
2130 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
2131 | }; | |
2132 | ||
2223cbec | 2133 | static int try_init_spmi(struct SPMITable *spmi) |
1da177e4 LT |
2134 | { |
2135 | struct smi_info *info; | |
d02b3709 | 2136 | int rv; |
1da177e4 | 2137 | |
1da177e4 | 2138 | if (spmi->IPMIlegacy != 1) { |
279fbd0c MS |
2139 | printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy); |
2140 | return -ENODEV; | |
1da177e4 LT |
2141 | } |
2142 | ||
de5e2ddf | 2143 | info = smi_info_alloc(); |
b0defcdb | 2144 | if (!info) { |
279fbd0c | 2145 | printk(KERN_ERR PFX "Could not allocate SI data (3)\n"); |
b0defcdb CM |
2146 | return -ENOMEM; |
2147 | } | |
2148 | ||
5fedc4a2 | 2149 | info->addr_source = SI_SPMI; |
279fbd0c | 2150 | printk(KERN_INFO PFX "probing via SPMI\n"); |
1da177e4 | 2151 | |
1da177e4 | 2152 | /* Figure out the interface type. */ |
c305e3d3 | 2153 | switch (spmi->InterfaceType) { |
1da177e4 | 2154 | case 1: /* KCS */ |
b0defcdb | 2155 | info->si_type = SI_KCS; |
1da177e4 | 2156 | break; |
1da177e4 | 2157 | case 2: /* SMIC */ |
b0defcdb | 2158 | info->si_type = SI_SMIC; |
1da177e4 | 2159 | break; |
1da177e4 | 2160 | case 3: /* BT */ |
b0defcdb | 2161 | info->si_type = SI_BT; |
1da177e4 | 2162 | break; |
ab42bf24 CM |
2163 | case 4: /* SSIF, just ignore */ |
2164 | kfree(info); | |
2165 | return -EIO; | |
1da177e4 | 2166 | default: |
279fbd0c MS |
2167 | printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n", |
2168 | spmi->InterfaceType); | |
b0defcdb | 2169 | kfree(info); |
1da177e4 LT |
2170 | return -EIO; |
2171 | } | |
2172 | ||
1da177e4 LT |
2173 | if (spmi->InterruptType & 1) { |
2174 | /* We've got a GPE interrupt. */ | |
2175 | info->irq = spmi->GPE; | |
2176 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
2177 | } else if (spmi->InterruptType & 2) { |
2178 | /* We've got an APIC/SAPIC interrupt. */ | |
2179 | info->irq = spmi->GlobalSystemInterrupt; | |
2180 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
2181 | } else { |
2182 | /* Use the default interrupt setting. */ | |
2183 | info->irq = 0; | |
2184 | info->irq_setup = NULL; | |
2185 | } | |
2186 | ||
15a58ed1 | 2187 | if (spmi->addr.bit_width) { |
35bc37a0 | 2188 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 2189 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 2190 | } else { |
35bc37a0 CM |
2191 | info->io.regspacing = DEFAULT_REGSPACING; |
2192 | } | |
b0defcdb | 2193 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 2194 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 2195 | |
15a58ed1 | 2196 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 2197 | info->io_setup = mem_setup; |
8fe1425a | 2198 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
15a58ed1 | 2199 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 2200 | info->io_setup = port_setup; |
8fe1425a | 2201 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
2202 | } else { |
2203 | kfree(info); | |
279fbd0c | 2204 | printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n"); |
1da177e4 LT |
2205 | return -EIO; |
2206 | } | |
b0defcdb | 2207 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 2208 | |
7bb671e3 YL |
2209 | pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n", |
2210 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2211 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2212 | info->irq); | |
2213 | ||
d02b3709 CM |
2214 | rv = add_smi(info); |
2215 | if (rv) | |
7faefea6 | 2216 | kfree(info); |
1da177e4 | 2217 | |
d02b3709 | 2218 | return rv; |
1da177e4 | 2219 | } |
b0defcdb | 2220 | |
2223cbec | 2221 | static void spmi_find_bmc(void) |
b0defcdb CM |
2222 | { |
2223 | acpi_status status; | |
2224 | struct SPMITable *spmi; | |
2225 | int i; | |
2226 | ||
2227 | if (acpi_disabled) | |
2228 | return; | |
2229 | ||
2230 | if (acpi_failure) | |
2231 | return; | |
2232 | ||
2233 | for (i = 0; ; i++) { | |
15a58ed1 AS |
2234 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
2235 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
2236 | if (status != AE_OK) |
2237 | return; | |
2238 | ||
18a3e0bf | 2239 | try_init_spmi(spmi); |
b0defcdb CM |
2240 | } |
2241 | } | |
9e368fa0 | 2242 | |
2223cbec | 2243 | static int ipmi_pnp_probe(struct pnp_dev *dev, |
9e368fa0 BH |
2244 | const struct pnp_device_id *dev_id) |
2245 | { | |
2246 | struct acpi_device *acpi_dev; | |
2247 | struct smi_info *info; | |
a9e31765 | 2248 | struct resource *res, *res_second; |
9e368fa0 BH |
2249 | acpi_handle handle; |
2250 | acpi_status status; | |
2251 | unsigned long long tmp; | |
d02b3709 | 2252 | int rv; |
9e368fa0 BH |
2253 | |
2254 | acpi_dev = pnp_acpi_device(dev); | |
2255 | if (!acpi_dev) | |
2256 | return -ENODEV; | |
2257 | ||
de5e2ddf | 2258 | info = smi_info_alloc(); |
9e368fa0 BH |
2259 | if (!info) |
2260 | return -ENOMEM; | |
2261 | ||
5fedc4a2 | 2262 | info->addr_source = SI_ACPI; |
279fbd0c | 2263 | printk(KERN_INFO PFX "probing via ACPI\n"); |
9e368fa0 BH |
2264 | |
2265 | handle = acpi_dev->handle; | |
16f4232c | 2266 | info->addr_info.acpi_info.acpi_handle = handle; |
9e368fa0 BH |
2267 | |
2268 | /* _IFT tells us the interface type: KCS, BT, etc */ | |
2269 | status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp); | |
2270 | if (ACPI_FAILURE(status)) | |
2271 | goto err_free; | |
2272 | ||
2273 | switch (tmp) { | |
2274 | case 1: | |
2275 | info->si_type = SI_KCS; | |
2276 | break; | |
2277 | case 2: | |
2278 | info->si_type = SI_SMIC; | |
2279 | break; | |
2280 | case 3: | |
2281 | info->si_type = SI_BT; | |
2282 | break; | |
ab42bf24 CM |
2283 | case 4: /* SSIF, just ignore */ |
2284 | goto err_free; | |
9e368fa0 | 2285 | default: |
279fbd0c | 2286 | dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp); |
9e368fa0 BH |
2287 | goto err_free; |
2288 | } | |
2289 | ||
279fbd0c MS |
2290 | res = pnp_get_resource(dev, IORESOURCE_IO, 0); |
2291 | if (res) { | |
9e368fa0 BH |
2292 | info->io_setup = port_setup; |
2293 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
9e368fa0 | 2294 | } else { |
279fbd0c MS |
2295 | res = pnp_get_resource(dev, IORESOURCE_MEM, 0); |
2296 | if (res) { | |
2297 | info->io_setup = mem_setup; | |
2298 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2299 | } | |
2300 | } | |
2301 | if (!res) { | |
9e368fa0 BH |
2302 | dev_err(&dev->dev, "no I/O or memory address\n"); |
2303 | goto err_free; | |
2304 | } | |
279fbd0c | 2305 | info->io.addr_data = res->start; |
9e368fa0 BH |
2306 | |
2307 | info->io.regspacing = DEFAULT_REGSPACING; | |
a9e31765 | 2308 | res_second = pnp_get_resource(dev, |
d9e1b6c4 YL |
2309 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? |
2310 | IORESOURCE_IO : IORESOURCE_MEM, | |
2311 | 1); | |
a9e31765 YL |
2312 | if (res_second) { |
2313 | if (res_second->start > info->io.addr_data) | |
2314 | info->io.regspacing = res_second->start - info->io.addr_data; | |
d9e1b6c4 | 2315 | } |
9e368fa0 BH |
2316 | info->io.regsize = DEFAULT_REGSPACING; |
2317 | info->io.regshift = 0; | |
2318 | ||
2319 | /* If _GPE exists, use it; otherwise use standard interrupts */ | |
2320 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); | |
2321 | if (ACPI_SUCCESS(status)) { | |
2322 | info->irq = tmp; | |
2323 | info->irq_setup = acpi_gpe_irq_setup; | |
2324 | } else if (pnp_irq_valid(dev, 0)) { | |
2325 | info->irq = pnp_irq(dev, 0); | |
2326 | info->irq_setup = std_irq_setup; | |
2327 | } | |
2328 | ||
8c8eae27 | 2329 | info->dev = &dev->dev; |
9e368fa0 BH |
2330 | pnp_set_drvdata(dev, info); |
2331 | ||
279fbd0c MS |
2332 | dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n", |
2333 | res, info->io.regsize, info->io.regspacing, | |
2334 | info->irq); | |
2335 | ||
d02b3709 CM |
2336 | rv = add_smi(info); |
2337 | if (rv) | |
2338 | kfree(info); | |
7faefea6 | 2339 | |
d02b3709 | 2340 | return rv; |
9e368fa0 BH |
2341 | |
2342 | err_free: | |
2343 | kfree(info); | |
2344 | return -EINVAL; | |
2345 | } | |
2346 | ||
39af33fc | 2347 | static void ipmi_pnp_remove(struct pnp_dev *dev) |
9e368fa0 BH |
2348 | { |
2349 | struct smi_info *info = pnp_get_drvdata(dev); | |
2350 | ||
2351 | cleanup_one_si(info); | |
2352 | } | |
2353 | ||
2354 | static const struct pnp_device_id pnp_dev_table[] = { | |
2355 | {"IPI0001", 0}, | |
2356 | {"", 0}, | |
2357 | }; | |
2358 | ||
2359 | static struct pnp_driver ipmi_pnp_driver = { | |
2360 | .name = DEVICE_NAME, | |
2361 | .probe = ipmi_pnp_probe, | |
bcd2982a | 2362 | .remove = ipmi_pnp_remove, |
9e368fa0 BH |
2363 | .id_table = pnp_dev_table, |
2364 | }; | |
a798e2d2 JD |
2365 | |
2366 | MODULE_DEVICE_TABLE(pnp, pnp_dev_table); | |
1da177e4 LT |
2367 | #endif |
2368 | ||
a9fad4cc | 2369 | #ifdef CONFIG_DMI |
c305e3d3 | 2370 | struct dmi_ipmi_data { |
1da177e4 LT |
2371 | u8 type; |
2372 | u8 addr_space; | |
2373 | unsigned long base_addr; | |
2374 | u8 irq; | |
2375 | u8 offset; | |
2376 | u8 slave_addr; | |
b0defcdb | 2377 | }; |
1da177e4 | 2378 | |
2223cbec | 2379 | static int decode_dmi(const struct dmi_header *dm, |
b0defcdb | 2380 | struct dmi_ipmi_data *dmi) |
1da177e4 | 2381 | { |
1855256c | 2382 | const u8 *data = (const u8 *)dm; |
1da177e4 LT |
2383 | unsigned long base_addr; |
2384 | u8 reg_spacing; | |
b224cd3a | 2385 | u8 len = dm->length; |
1da177e4 | 2386 | |
b0defcdb | 2387 | dmi->type = data[4]; |
1da177e4 LT |
2388 | |
2389 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
2390 | if (len >= 0x11) { | |
2391 | if (base_addr & 1) { | |
2392 | /* I/O */ | |
2393 | base_addr &= 0xFFFE; | |
b0defcdb | 2394 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
c305e3d3 | 2395 | } else |
1da177e4 | 2396 | /* Memory */ |
b0defcdb | 2397 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
c305e3d3 | 2398 | |
1da177e4 LT |
2399 | /* If bit 4 of byte 0x10 is set, then the lsb for the address |
2400 | is odd. */ | |
b0defcdb | 2401 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 2402 | |
b0defcdb | 2403 | dmi->irq = data[0x11]; |
1da177e4 LT |
2404 | |
2405 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 2406 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
c305e3d3 | 2407 | switch (reg_spacing) { |
1da177e4 | 2408 | case 0x00: /* Byte boundaries */ |
b0defcdb | 2409 | dmi->offset = 1; |
1da177e4 LT |
2410 | break; |
2411 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 2412 | dmi->offset = 4; |
1da177e4 LT |
2413 | break; |
2414 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 2415 | dmi->offset = 16; |
1da177e4 LT |
2416 | break; |
2417 | default: | |
2418 | /* Some other interface, just ignore it. */ | |
2419 | return -EIO; | |
2420 | } | |
2421 | } else { | |
2422 | /* Old DMI spec. */ | |
c305e3d3 CM |
2423 | /* |
2424 | * Note that technically, the lower bit of the base | |
92068801 CM |
2425 | * address should be 1 if the address is I/O and 0 if |
2426 | * the address is in memory. So many systems get that | |
2427 | * wrong (and all that I have seen are I/O) so we just | |
2428 | * ignore that bit and assume I/O. Systems that use | |
c305e3d3 CM |
2429 | * memory should use the newer spec, anyway. |
2430 | */ | |
b0defcdb CM |
2431 | dmi->base_addr = base_addr & 0xfffe; |
2432 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
2433 | dmi->offset = 1; | |
1da177e4 LT |
2434 | } |
2435 | ||
b0defcdb | 2436 | dmi->slave_addr = data[6]; |
1da177e4 | 2437 | |
b0defcdb | 2438 | return 0; |
1da177e4 LT |
2439 | } |
2440 | ||
2223cbec | 2441 | static void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 2442 | { |
b0defcdb | 2443 | struct smi_info *info; |
1da177e4 | 2444 | |
de5e2ddf | 2445 | info = smi_info_alloc(); |
b0defcdb | 2446 | if (!info) { |
279fbd0c | 2447 | printk(KERN_ERR PFX "Could not allocate SI data\n"); |
b0defcdb | 2448 | return; |
1da177e4 | 2449 | } |
1da177e4 | 2450 | |
5fedc4a2 | 2451 | info->addr_source = SI_SMBIOS; |
279fbd0c | 2452 | printk(KERN_INFO PFX "probing via SMBIOS\n"); |
1da177e4 | 2453 | |
e8b33617 | 2454 | switch (ipmi_data->type) { |
b0defcdb CM |
2455 | case 0x01: /* KCS */ |
2456 | info->si_type = SI_KCS; | |
2457 | break; | |
2458 | case 0x02: /* SMIC */ | |
2459 | info->si_type = SI_SMIC; | |
2460 | break; | |
2461 | case 0x03: /* BT */ | |
2462 | info->si_type = SI_BT; | |
2463 | break; | |
2464 | default: | |
80cd6920 | 2465 | kfree(info); |
b0defcdb | 2466 | return; |
1da177e4 | 2467 | } |
1da177e4 | 2468 | |
b0defcdb CM |
2469 | switch (ipmi_data->addr_space) { |
2470 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2471 | info->io_setup = mem_setup; |
b0defcdb CM |
2472 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2473 | break; | |
2474 | ||
2475 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2476 | info->io_setup = port_setup; |
b0defcdb CM |
2477 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2478 | break; | |
2479 | ||
2480 | default: | |
1da177e4 | 2481 | kfree(info); |
279fbd0c | 2482 | printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n", |
b0defcdb CM |
2483 | ipmi_data->addr_space); |
2484 | return; | |
1da177e4 | 2485 | } |
b0defcdb | 2486 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2487 | |
b0defcdb CM |
2488 | info->io.regspacing = ipmi_data->offset; |
2489 | if (!info->io.regspacing) | |
1da177e4 LT |
2490 | info->io.regspacing = DEFAULT_REGSPACING; |
2491 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2492 | info->io.regshift = 0; |
1da177e4 LT |
2493 | |
2494 | info->slave_addr = ipmi_data->slave_addr; | |
2495 | ||
b0defcdb CM |
2496 | info->irq = ipmi_data->irq; |
2497 | if (info->irq) | |
2498 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2499 | |
7bb671e3 YL |
2500 | pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n", |
2501 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2502 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2503 | info->irq); | |
2504 | ||
7faefea6 YL |
2505 | if (add_smi(info)) |
2506 | kfree(info); | |
b0defcdb | 2507 | } |
1da177e4 | 2508 | |
2223cbec | 2509 | static void dmi_find_bmc(void) |
b0defcdb | 2510 | { |
1855256c | 2511 | const struct dmi_device *dev = NULL; |
b0defcdb CM |
2512 | struct dmi_ipmi_data data; |
2513 | int rv; | |
2514 | ||
2515 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2516 | memset(&data, 0, sizeof(data)); |
1855256c JG |
2517 | rv = decode_dmi((const struct dmi_header *) dev->device_data, |
2518 | &data); | |
b0defcdb CM |
2519 | if (!rv) |
2520 | try_init_dmi(&data); | |
2521 | } | |
1da177e4 | 2522 | } |
a9fad4cc | 2523 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2524 | |
2525 | #ifdef CONFIG_PCI | |
2526 | ||
b0defcdb CM |
2527 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2528 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2529 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2530 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2531 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2532 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2533 | ||
1da177e4 LT |
2534 | #define PCI_HP_VENDOR_ID 0x103C |
2535 | #define PCI_MMC_DEVICE_ID 0x121A | |
2536 | #define PCI_MMC_ADDR_CW 0x10 | |
2537 | ||
b0defcdb CM |
2538 | static void ipmi_pci_cleanup(struct smi_info *info) |
2539 | { | |
2540 | struct pci_dev *pdev = info->addr_source_data; | |
2541 | ||
2542 | pci_disable_device(pdev); | |
2543 | } | |
1da177e4 | 2544 | |
2223cbec | 2545 | static int ipmi_pci_probe_regspacing(struct smi_info *info) |
a6c16c28 CM |
2546 | { |
2547 | if (info->si_type == SI_KCS) { | |
2548 | unsigned char status; | |
2549 | int regspacing; | |
2550 | ||
2551 | info->io.regsize = DEFAULT_REGSIZE; | |
2552 | info->io.regshift = 0; | |
2553 | info->io_size = 2; | |
2554 | info->handlers = &kcs_smi_handlers; | |
2555 | ||
2556 | /* detect 1, 4, 16byte spacing */ | |
2557 | for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) { | |
2558 | info->io.regspacing = regspacing; | |
2559 | if (info->io_setup(info)) { | |
2560 | dev_err(info->dev, | |
2561 | "Could not setup I/O space\n"); | |
2562 | return DEFAULT_REGSPACING; | |
2563 | } | |
2564 | /* write invalid cmd */ | |
2565 | info->io.outputb(&info->io, 1, 0x10); | |
2566 | /* read status back */ | |
2567 | status = info->io.inputb(&info->io, 1); | |
2568 | info->io_cleanup(info); | |
2569 | if (status) | |
2570 | return regspacing; | |
2571 | regspacing *= 4; | |
2572 | } | |
2573 | } | |
2574 | return DEFAULT_REGSPACING; | |
2575 | } | |
2576 | ||
2223cbec | 2577 | static int ipmi_pci_probe(struct pci_dev *pdev, |
b0defcdb | 2578 | const struct pci_device_id *ent) |
1da177e4 | 2579 | { |
b0defcdb CM |
2580 | int rv; |
2581 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2582 | struct smi_info *info; | |
1da177e4 | 2583 | |
de5e2ddf | 2584 | info = smi_info_alloc(); |
b0defcdb | 2585 | if (!info) |
1cd441f9 | 2586 | return -ENOMEM; |
1da177e4 | 2587 | |
5fedc4a2 | 2588 | info->addr_source = SI_PCI; |
279fbd0c | 2589 | dev_info(&pdev->dev, "probing via PCI"); |
1da177e4 | 2590 | |
b0defcdb CM |
2591 | switch (class_type) { |
2592 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2593 | info->si_type = SI_SMIC; | |
2594 | break; | |
1da177e4 | 2595 | |
b0defcdb CM |
2596 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2597 | info->si_type = SI_KCS; | |
2598 | break; | |
2599 | ||
2600 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2601 | info->si_type = SI_BT; | |
2602 | break; | |
2603 | ||
2604 | default: | |
2605 | kfree(info); | |
279fbd0c | 2606 | dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type); |
1cd441f9 | 2607 | return -ENOMEM; |
1da177e4 LT |
2608 | } |
2609 | ||
b0defcdb CM |
2610 | rv = pci_enable_device(pdev); |
2611 | if (rv) { | |
279fbd0c | 2612 | dev_err(&pdev->dev, "couldn't enable PCI device\n"); |
b0defcdb CM |
2613 | kfree(info); |
2614 | return rv; | |
1da177e4 LT |
2615 | } |
2616 | ||
b0defcdb CM |
2617 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2618 | info->addr_source_data = pdev; | |
1da177e4 | 2619 | |
b0defcdb CM |
2620 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2621 | info->io_setup = port_setup; | |
2622 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2623 | } else { | |
2624 | info->io_setup = mem_setup; | |
2625 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2626 | } |
b0defcdb | 2627 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2628 | |
a6c16c28 CM |
2629 | info->io.regspacing = ipmi_pci_probe_regspacing(info); |
2630 | info->io.regsize = DEFAULT_REGSIZE; | |
b0defcdb | 2631 | info->io.regshift = 0; |
1da177e4 | 2632 | |
b0defcdb CM |
2633 | info->irq = pdev->irq; |
2634 | if (info->irq) | |
2635 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2636 | |
50c812b2 | 2637 | info->dev = &pdev->dev; |
fca3b747 | 2638 | pci_set_drvdata(pdev, info); |
50c812b2 | 2639 | |
279fbd0c MS |
2640 | dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n", |
2641 | &pdev->resource[0], info->io.regsize, info->io.regspacing, | |
2642 | info->irq); | |
2643 | ||
d02b3709 CM |
2644 | rv = add_smi(info); |
2645 | if (rv) { | |
7faefea6 | 2646 | kfree(info); |
d02b3709 CM |
2647 | pci_disable_device(pdev); |
2648 | } | |
7faefea6 | 2649 | |
d02b3709 | 2650 | return rv; |
b0defcdb | 2651 | } |
1da177e4 | 2652 | |
39af33fc | 2653 | static void ipmi_pci_remove(struct pci_dev *pdev) |
b0defcdb | 2654 | { |
fca3b747 CM |
2655 | struct smi_info *info = pci_get_drvdata(pdev); |
2656 | cleanup_one_si(info); | |
d02b3709 | 2657 | pci_disable_device(pdev); |
b0defcdb | 2658 | } |
1da177e4 | 2659 | |
b0defcdb CM |
2660 | static struct pci_device_id ipmi_pci_devices[] = { |
2661 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
248bdd5e KC |
2662 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, |
2663 | { 0, } | |
b0defcdb CM |
2664 | }; |
2665 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2666 | ||
2667 | static struct pci_driver ipmi_pci_driver = { | |
c305e3d3 CM |
2668 | .name = DEVICE_NAME, |
2669 | .id_table = ipmi_pci_devices, | |
2670 | .probe = ipmi_pci_probe, | |
bcd2982a | 2671 | .remove = ipmi_pci_remove, |
b0defcdb CM |
2672 | }; |
2673 | #endif /* CONFIG_PCI */ | |
1da177e4 | 2674 | |
b1608d69 | 2675 | static struct of_device_id ipmi_match[]; |
2223cbec | 2676 | static int ipmi_probe(struct platform_device *dev) |
dba9b4f6 | 2677 | { |
a1e9c9dd | 2678 | #ifdef CONFIG_OF |
b1608d69 | 2679 | const struct of_device_id *match; |
dba9b4f6 CM |
2680 | struct smi_info *info; |
2681 | struct resource resource; | |
da81c3b9 | 2682 | const __be32 *regsize, *regspacing, *regshift; |
61c7a080 | 2683 | struct device_node *np = dev->dev.of_node; |
dba9b4f6 CM |
2684 | int ret; |
2685 | int proplen; | |
2686 | ||
279fbd0c | 2687 | dev_info(&dev->dev, "probing via device tree\n"); |
dba9b4f6 | 2688 | |
b1608d69 GL |
2689 | match = of_match_device(ipmi_match, &dev->dev); |
2690 | if (!match) | |
a1e9c9dd RH |
2691 | return -EINVAL; |
2692 | ||
08dc4169 BH |
2693 | if (!of_device_is_available(np)) |
2694 | return -EINVAL; | |
2695 | ||
dba9b4f6 CM |
2696 | ret = of_address_to_resource(np, 0, &resource); |
2697 | if (ret) { | |
2698 | dev_warn(&dev->dev, PFX "invalid address from OF\n"); | |
2699 | return ret; | |
2700 | } | |
2701 | ||
9c25099d | 2702 | regsize = of_get_property(np, "reg-size", &proplen); |
dba9b4f6 CM |
2703 | if (regsize && proplen != 4) { |
2704 | dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); | |
2705 | return -EINVAL; | |
2706 | } | |
2707 | ||
9c25099d | 2708 | regspacing = of_get_property(np, "reg-spacing", &proplen); |
dba9b4f6 CM |
2709 | if (regspacing && proplen != 4) { |
2710 | dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); | |
2711 | return -EINVAL; | |
2712 | } | |
2713 | ||
9c25099d | 2714 | regshift = of_get_property(np, "reg-shift", &proplen); |
dba9b4f6 CM |
2715 | if (regshift && proplen != 4) { |
2716 | dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); | |
2717 | return -EINVAL; | |
2718 | } | |
2719 | ||
de5e2ddf | 2720 | info = smi_info_alloc(); |
dba9b4f6 CM |
2721 | |
2722 | if (!info) { | |
2723 | dev_err(&dev->dev, | |
279fbd0c | 2724 | "could not allocate memory for OF probe\n"); |
dba9b4f6 CM |
2725 | return -ENOMEM; |
2726 | } | |
2727 | ||
b1608d69 | 2728 | info->si_type = (enum si_type) match->data; |
5fedc4a2 | 2729 | info->addr_source = SI_DEVICETREE; |
dba9b4f6 CM |
2730 | info->irq_setup = std_irq_setup; |
2731 | ||
3b7ec117 NC |
2732 | if (resource.flags & IORESOURCE_IO) { |
2733 | info->io_setup = port_setup; | |
2734 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2735 | } else { | |
2736 | info->io_setup = mem_setup; | |
2737 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2738 | } | |
2739 | ||
dba9b4f6 CM |
2740 | info->io.addr_data = resource.start; |
2741 | ||
da81c3b9 RH |
2742 | info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE; |
2743 | info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING; | |
2744 | info->io.regshift = regshift ? be32_to_cpup(regshift) : 0; | |
dba9b4f6 | 2745 | |
61c7a080 | 2746 | info->irq = irq_of_parse_and_map(dev->dev.of_node, 0); |
dba9b4f6 CM |
2747 | info->dev = &dev->dev; |
2748 | ||
279fbd0c | 2749 | dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n", |
dba9b4f6 CM |
2750 | info->io.addr_data, info->io.regsize, info->io.regspacing, |
2751 | info->irq); | |
2752 | ||
9de33df4 | 2753 | dev_set_drvdata(&dev->dev, info); |
dba9b4f6 | 2754 | |
d02b3709 CM |
2755 | ret = add_smi(info); |
2756 | if (ret) { | |
7faefea6 | 2757 | kfree(info); |
d02b3709 | 2758 | return ret; |
7faefea6 | 2759 | } |
a1e9c9dd | 2760 | #endif |
7faefea6 | 2761 | return 0; |
dba9b4f6 CM |
2762 | } |
2763 | ||
39af33fc | 2764 | static int ipmi_remove(struct platform_device *dev) |
dba9b4f6 | 2765 | { |
a1e9c9dd | 2766 | #ifdef CONFIG_OF |
9de33df4 | 2767 | cleanup_one_si(dev_get_drvdata(&dev->dev)); |
a1e9c9dd | 2768 | #endif |
dba9b4f6 CM |
2769 | return 0; |
2770 | } | |
2771 | ||
2772 | static struct of_device_id ipmi_match[] = | |
2773 | { | |
c305e3d3 CM |
2774 | { .type = "ipmi", .compatible = "ipmi-kcs", |
2775 | .data = (void *)(unsigned long) SI_KCS }, | |
2776 | { .type = "ipmi", .compatible = "ipmi-smic", | |
2777 | .data = (void *)(unsigned long) SI_SMIC }, | |
2778 | { .type = "ipmi", .compatible = "ipmi-bt", | |
2779 | .data = (void *)(unsigned long) SI_BT }, | |
dba9b4f6 CM |
2780 | {}, |
2781 | }; | |
2782 | ||
a1e9c9dd | 2783 | static struct platform_driver ipmi_driver = { |
4018294b | 2784 | .driver = { |
a1e9c9dd | 2785 | .name = DEVICE_NAME, |
4018294b GL |
2786 | .owner = THIS_MODULE, |
2787 | .of_match_table = ipmi_match, | |
2788 | }, | |
a1e9c9dd | 2789 | .probe = ipmi_probe, |
bcd2982a | 2790 | .remove = ipmi_remove, |
dba9b4f6 | 2791 | }; |
dba9b4f6 | 2792 | |
fdbeb7de TB |
2793 | #ifdef CONFIG_PARISC |
2794 | static int ipmi_parisc_probe(struct parisc_device *dev) | |
2795 | { | |
2796 | struct smi_info *info; | |
dfa19426 | 2797 | int rv; |
fdbeb7de TB |
2798 | |
2799 | info = smi_info_alloc(); | |
2800 | ||
2801 | if (!info) { | |
2802 | dev_err(&dev->dev, | |
2803 | "could not allocate memory for PARISC probe\n"); | |
2804 | return -ENOMEM; | |
2805 | } | |
2806 | ||
2807 | info->si_type = SI_KCS; | |
2808 | info->addr_source = SI_DEVICETREE; | |
2809 | info->io_setup = mem_setup; | |
2810 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2811 | info->io.addr_data = dev->hpa.start; | |
2812 | info->io.regsize = 1; | |
2813 | info->io.regspacing = 1; | |
2814 | info->io.regshift = 0; | |
2815 | info->irq = 0; /* no interrupt */ | |
2816 | info->irq_setup = NULL; | |
2817 | info->dev = &dev->dev; | |
2818 | ||
2819 | dev_dbg(&dev->dev, "addr 0x%lx\n", info->io.addr_data); | |
2820 | ||
2821 | dev_set_drvdata(&dev->dev, info); | |
2822 | ||
d02b3709 CM |
2823 | rv = add_smi(info); |
2824 | if (rv) { | |
fdbeb7de | 2825 | kfree(info); |
d02b3709 | 2826 | return rv; |
fdbeb7de TB |
2827 | } |
2828 | ||
2829 | return 0; | |
2830 | } | |
2831 | ||
2832 | static int ipmi_parisc_remove(struct parisc_device *dev) | |
2833 | { | |
2834 | cleanup_one_si(dev_get_drvdata(&dev->dev)); | |
2835 | return 0; | |
2836 | } | |
2837 | ||
2838 | static struct parisc_device_id ipmi_parisc_tbl[] = { | |
2839 | { HPHW_MC, HVERSION_REV_ANY_ID, 0x004, 0xC0 }, | |
2840 | { 0, } | |
2841 | }; | |
2842 | ||
2843 | static struct parisc_driver ipmi_parisc_driver = { | |
2844 | .name = "ipmi", | |
2845 | .id_table = ipmi_parisc_tbl, | |
2846 | .probe = ipmi_parisc_probe, | |
2847 | .remove = ipmi_parisc_remove, | |
2848 | }; | |
2849 | #endif /* CONFIG_PARISC */ | |
2850 | ||
40112ae7 | 2851 | static int wait_for_msg_done(struct smi_info *smi_info) |
1da177e4 | 2852 | { |
50c812b2 | 2853 | enum si_sm_result smi_result; |
1da177e4 LT |
2854 | |
2855 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 2856 | for (;;) { |
c3e7e791 CM |
2857 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2858 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2859 | schedule_timeout_uninterruptible(1); |
1da177e4 | 2860 | smi_result = smi_info->handlers->event( |
e21404dc | 2861 | smi_info->si_sm, jiffies_to_usecs(1)); |
c305e3d3 | 2862 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
2863 | smi_result = smi_info->handlers->event( |
2864 | smi_info->si_sm, 0); | |
c305e3d3 | 2865 | } else |
1da177e4 LT |
2866 | break; |
2867 | } | |
40112ae7 | 2868 | if (smi_result == SI_SM_HOSED) |
c305e3d3 CM |
2869 | /* |
2870 | * We couldn't get the state machine to run, so whatever's at | |
2871 | * the port is probably not an IPMI SMI interface. | |
2872 | */ | |
40112ae7 CM |
2873 | return -ENODEV; |
2874 | ||
2875 | return 0; | |
2876 | } | |
2877 | ||
2878 | static int try_get_dev_id(struct smi_info *smi_info) | |
2879 | { | |
2880 | unsigned char msg[2]; | |
2881 | unsigned char *resp; | |
2882 | unsigned long resp_len; | |
2883 | int rv = 0; | |
2884 | ||
2885 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2886 | if (!resp) | |
2887 | return -ENOMEM; | |
2888 | ||
2889 | /* | |
2890 | * Do a Get Device ID command, since it comes back with some | |
2891 | * useful info. | |
2892 | */ | |
2893 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2894 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2895 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2896 | ||
2897 | rv = wait_for_msg_done(smi_info); | |
2898 | if (rv) | |
1da177e4 | 2899 | goto out; |
1da177e4 | 2900 | |
1da177e4 LT |
2901 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, |
2902 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 2903 | |
d8c98618 CM |
2904 | /* Check and record info from the get device id, in case we need it. */ |
2905 | rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); | |
1da177e4 LT |
2906 | |
2907 | out: | |
2908 | kfree(resp); | |
2909 | return rv; | |
2910 | } | |
2911 | ||
40112ae7 CM |
2912 | static int try_enable_event_buffer(struct smi_info *smi_info) |
2913 | { | |
2914 | unsigned char msg[3]; | |
2915 | unsigned char *resp; | |
2916 | unsigned long resp_len; | |
2917 | int rv = 0; | |
2918 | ||
2919 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2920 | if (!resp) | |
2921 | return -ENOMEM; | |
2922 | ||
2923 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2924 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
2925 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2926 | ||
2927 | rv = wait_for_msg_done(smi_info); | |
2928 | if (rv) { | |
279fbd0c MS |
2929 | printk(KERN_WARNING PFX "Error getting response from get" |
2930 | " global enables command, the event buffer is not" | |
40112ae7 CM |
2931 | " enabled.\n"); |
2932 | goto out; | |
2933 | } | |
2934 | ||
2935 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2936 | resp, IPMI_MAX_MSG_LENGTH); | |
2937 | ||
2938 | if (resp_len < 4 || | |
2939 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2940 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
2941 | resp[2] != 0) { | |
279fbd0c MS |
2942 | printk(KERN_WARNING PFX "Invalid return from get global" |
2943 | " enables command, cannot enable the event buffer.\n"); | |
40112ae7 CM |
2944 | rv = -EINVAL; |
2945 | goto out; | |
2946 | } | |
2947 | ||
2948 | if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) | |
2949 | /* buffer is already enabled, nothing to do. */ | |
2950 | goto out; | |
2951 | ||
2952 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2953 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
2954 | msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; | |
2955 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
2956 | ||
2957 | rv = wait_for_msg_done(smi_info); | |
2958 | if (rv) { | |
279fbd0c MS |
2959 | printk(KERN_WARNING PFX "Error getting response from set" |
2960 | " global, enables command, the event buffer is not" | |
40112ae7 CM |
2961 | " enabled.\n"); |
2962 | goto out; | |
2963 | } | |
2964 | ||
2965 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2966 | resp, IPMI_MAX_MSG_LENGTH); | |
2967 | ||
2968 | if (resp_len < 3 || | |
2969 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2970 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
279fbd0c MS |
2971 | printk(KERN_WARNING PFX "Invalid return from get global," |
2972 | "enables command, not enable the event buffer.\n"); | |
40112ae7 CM |
2973 | rv = -EINVAL; |
2974 | goto out; | |
2975 | } | |
2976 | ||
2977 | if (resp[2] != 0) | |
2978 | /* | |
2979 | * An error when setting the event buffer bit means | |
2980 | * that the event buffer is not supported. | |
2981 | */ | |
2982 | rv = -ENOENT; | |
2983 | out: | |
2984 | kfree(resp); | |
2985 | return rv; | |
2986 | } | |
2987 | ||
07412736 | 2988 | static int smi_type_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2989 | { |
07412736 | 2990 | struct smi_info *smi = m->private; |
1da177e4 | 2991 | |
07412736 | 2992 | return seq_printf(m, "%s\n", si_to_str[smi->si_type]); |
1da177e4 LT |
2993 | } |
2994 | ||
07412736 | 2995 | static int smi_type_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2996 | { |
d9dda78b | 2997 | return single_open(file, smi_type_proc_show, PDE_DATA(inode)); |
07412736 AD |
2998 | } |
2999 | ||
3000 | static const struct file_operations smi_type_proc_ops = { | |
3001 | .open = smi_type_proc_open, | |
3002 | .read = seq_read, | |
3003 | .llseek = seq_lseek, | |
3004 | .release = single_release, | |
3005 | }; | |
3006 | ||
3007 | static int smi_si_stats_proc_show(struct seq_file *m, void *v) | |
3008 | { | |
3009 | struct smi_info *smi = m->private; | |
1da177e4 | 3010 | |
07412736 | 3011 | seq_printf(m, "interrupts_enabled: %d\n", |
b0defcdb | 3012 | smi->irq && !smi->interrupt_disabled); |
07412736 | 3013 | seq_printf(m, "short_timeouts: %u\n", |
64959e2d | 3014 | smi_get_stat(smi, short_timeouts)); |
07412736 | 3015 | seq_printf(m, "long_timeouts: %u\n", |
64959e2d | 3016 | smi_get_stat(smi, long_timeouts)); |
07412736 | 3017 | seq_printf(m, "idles: %u\n", |
64959e2d | 3018 | smi_get_stat(smi, idles)); |
07412736 | 3019 | seq_printf(m, "interrupts: %u\n", |
64959e2d | 3020 | smi_get_stat(smi, interrupts)); |
07412736 | 3021 | seq_printf(m, "attentions: %u\n", |
64959e2d | 3022 | smi_get_stat(smi, attentions)); |
07412736 | 3023 | seq_printf(m, "flag_fetches: %u\n", |
64959e2d | 3024 | smi_get_stat(smi, flag_fetches)); |
07412736 | 3025 | seq_printf(m, "hosed_count: %u\n", |
64959e2d | 3026 | smi_get_stat(smi, hosed_count)); |
07412736 | 3027 | seq_printf(m, "complete_transactions: %u\n", |
64959e2d | 3028 | smi_get_stat(smi, complete_transactions)); |
07412736 | 3029 | seq_printf(m, "events: %u\n", |
64959e2d | 3030 | smi_get_stat(smi, events)); |
07412736 | 3031 | seq_printf(m, "watchdog_pretimeouts: %u\n", |
64959e2d | 3032 | smi_get_stat(smi, watchdog_pretimeouts)); |
07412736 | 3033 | seq_printf(m, "incoming_messages: %u\n", |
64959e2d | 3034 | smi_get_stat(smi, incoming_messages)); |
07412736 AD |
3035 | return 0; |
3036 | } | |
1da177e4 | 3037 | |
07412736 AD |
3038 | static int smi_si_stats_proc_open(struct inode *inode, struct file *file) |
3039 | { | |
d9dda78b | 3040 | return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode)); |
b361e27b CM |
3041 | } |
3042 | ||
07412736 AD |
3043 | static const struct file_operations smi_si_stats_proc_ops = { |
3044 | .open = smi_si_stats_proc_open, | |
3045 | .read = seq_read, | |
3046 | .llseek = seq_lseek, | |
3047 | .release = single_release, | |
3048 | }; | |
3049 | ||
3050 | static int smi_params_proc_show(struct seq_file *m, void *v) | |
b361e27b | 3051 | { |
07412736 | 3052 | struct smi_info *smi = m->private; |
b361e27b | 3053 | |
07412736 | 3054 | return seq_printf(m, |
b361e27b CM |
3055 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", |
3056 | si_to_str[smi->si_type], | |
3057 | addr_space_to_str[smi->io.addr_type], | |
3058 | smi->io.addr_data, | |
3059 | smi->io.regspacing, | |
3060 | smi->io.regsize, | |
3061 | smi->io.regshift, | |
3062 | smi->irq, | |
3063 | smi->slave_addr); | |
1da177e4 LT |
3064 | } |
3065 | ||
07412736 AD |
3066 | static int smi_params_proc_open(struct inode *inode, struct file *file) |
3067 | { | |
d9dda78b | 3068 | return single_open(file, smi_params_proc_show, PDE_DATA(inode)); |
07412736 AD |
3069 | } |
3070 | ||
3071 | static const struct file_operations smi_params_proc_ops = { | |
3072 | .open = smi_params_proc_open, | |
3073 | .read = seq_read, | |
3074 | .llseek = seq_lseek, | |
3075 | .release = single_release, | |
3076 | }; | |
3077 | ||
3ae0e0f9 CM |
3078 | /* |
3079 | * oem_data_avail_to_receive_msg_avail | |
3080 | * @info - smi_info structure with msg_flags set | |
3081 | * | |
3082 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
3083 | * Returns 1 indicating need to re-run handle_flags(). | |
3084 | */ | |
3085 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
3086 | { | |
e8b33617 | 3087 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 3088 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
3089 | return 1; |
3090 | } | |
3091 | ||
3092 | /* | |
3093 | * setup_dell_poweredge_oem_data_handler | |
3094 | * @info - smi_info.device_id must be populated | |
3095 | * | |
3096 | * Systems that match, but have firmware version < 1.40 may assert | |
3097 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
3098 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
3099 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
3100 | * as RECEIVE_MSG_AVAIL instead. | |
3101 | * | |
3102 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
3103 | * assert the OEM[012] bits, and if it did, the driver would have to | |
3104 | * change to handle that properly, we don't actually check for the | |
3105 | * firmware version. | |
3106 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
3107 | * Device Revision = 0x80 | |
3108 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
3109 | * Firmware Revision2 = 0x40 BCD encoded | |
3110 | * IPMI Version = 0x51 IPMI 1.5 | |
3111 | * Manufacturer ID = A2 02 00 Dell IANA | |
3112 | * | |
d5a2b89a CM |
3113 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
3114 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
3115 | * | |
3ae0e0f9 CM |
3116 | */ |
3117 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
3118 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
3119 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 3120 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
3121 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
3122 | { | |
3123 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3124 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
3125 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
3126 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 3127 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
3128 | smi_info->oem_data_avail_handler = |
3129 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
3130 | } else if (ipmi_version_major(id) < 1 || |
3131 | (ipmi_version_major(id) == 1 && | |
3132 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
3133 | smi_info->oem_data_avail_handler = |
3134 | oem_data_avail_to_receive_msg_avail; | |
3135 | } | |
3ae0e0f9 CM |
3136 | } |
3137 | } | |
3138 | ||
ea94027b CM |
3139 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
3140 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
3141 | { | |
3142 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
3143 | ||
25985edc | 3144 | /* Make it a response */ |
ea94027b CM |
3145 | msg->rsp[0] = msg->data[0] | 4; |
3146 | msg->rsp[1] = msg->data[1]; | |
3147 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
3148 | msg->rsp_size = 3; | |
3149 | smi_info->curr_msg = NULL; | |
3150 | deliver_recv_msg(smi_info, msg); | |
3151 | } | |
3152 | ||
3153 | /* | |
3154 | * dell_poweredge_bt_xaction_handler | |
3155 | * @info - smi_info.device_id must be populated | |
3156 | * | |
3157 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
3158 | * not respond to a Get SDR command if the length of the data | |
3159 | * requested is exactly 0x3A, which leads to command timeouts and no | |
3160 | * data returned. This intercepts such commands, and causes userspace | |
3161 | * callers to try again with a different-sized buffer, which succeeds. | |
3162 | */ | |
3163 | ||
3164 | #define STORAGE_NETFN 0x0A | |
3165 | #define STORAGE_CMD_GET_SDR 0x23 | |
3166 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
3167 | unsigned long unused, | |
3168 | void *in) | |
3169 | { | |
3170 | struct smi_info *smi_info = in; | |
3171 | unsigned char *data = smi_info->curr_msg->data; | |
3172 | unsigned int size = smi_info->curr_msg->data_size; | |
3173 | if (size >= 8 && | |
3174 | (data[0]>>2) == STORAGE_NETFN && | |
3175 | data[1] == STORAGE_CMD_GET_SDR && | |
3176 | data[7] == 0x3A) { | |
3177 | return_hosed_msg_badsize(smi_info); | |
3178 | return NOTIFY_STOP; | |
3179 | } | |
3180 | return NOTIFY_DONE; | |
3181 | } | |
3182 | ||
3183 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
3184 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
3185 | }; | |
3186 | ||
3187 | /* | |
3188 | * setup_dell_poweredge_bt_xaction_handler | |
3189 | * @info - smi_info.device_id must be filled in already | |
3190 | * | |
3191 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
3192 | * when we know what function to use there. | |
3193 | */ | |
3194 | static void | |
3195 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
3196 | { | |
3197 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3198 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
3199 | smi_info->si_type == SI_BT) |
3200 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
3201 | } | |
3202 | ||
3ae0e0f9 CM |
3203 | /* |
3204 | * setup_oem_data_handler | |
3205 | * @info - smi_info.device_id must be filled in already | |
3206 | * | |
3207 | * Fills in smi_info.device_id.oem_data_available_handler | |
3208 | * when we know what function to use there. | |
3209 | */ | |
3210 | ||
3211 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
3212 | { | |
3213 | setup_dell_poweredge_oem_data_handler(smi_info); | |
3214 | } | |
3215 | ||
ea94027b CM |
3216 | static void setup_xaction_handlers(struct smi_info *smi_info) |
3217 | { | |
3218 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
3219 | } | |
3220 | ||
a9a2c44f CM |
3221 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
3222 | { | |
453823ba | 3223 | if (smi_info->intf) { |
c305e3d3 CM |
3224 | /* |
3225 | * The timer and thread are only running if the | |
3226 | * interface has been started up and registered. | |
3227 | */ | |
453823ba CM |
3228 | if (smi_info->thread != NULL) |
3229 | kthread_stop(smi_info->thread); | |
3230 | del_timer_sync(&smi_info->si_timer); | |
3231 | } | |
a9a2c44f CM |
3232 | } |
3233 | ||
0bbed20e | 3234 | static struct ipmi_default_vals |
b0defcdb CM |
3235 | { |
3236 | int type; | |
3237 | int port; | |
7420884c | 3238 | } ipmi_defaults[] = |
b0defcdb CM |
3239 | { |
3240 | { .type = SI_KCS, .port = 0xca2 }, | |
3241 | { .type = SI_SMIC, .port = 0xca9 }, | |
3242 | { .type = SI_BT, .port = 0xe4 }, | |
3243 | { .port = 0 } | |
3244 | }; | |
3245 | ||
2223cbec | 3246 | static void default_find_bmc(void) |
b0defcdb CM |
3247 | { |
3248 | struct smi_info *info; | |
3249 | int i; | |
3250 | ||
3251 | for (i = 0; ; i++) { | |
3252 | if (!ipmi_defaults[i].port) | |
3253 | break; | |
68e1ee62 | 3254 | #ifdef CONFIG_PPC |
4ff31d77 CK |
3255 | if (check_legacy_ioport(ipmi_defaults[i].port)) |
3256 | continue; | |
3257 | #endif | |
de5e2ddf | 3258 | info = smi_info_alloc(); |
a09f4855 AM |
3259 | if (!info) |
3260 | return; | |
4ff31d77 | 3261 | |
5fedc4a2 | 3262 | info->addr_source = SI_DEFAULT; |
b0defcdb CM |
3263 | |
3264 | info->si_type = ipmi_defaults[i].type; | |
3265 | info->io_setup = port_setup; | |
3266 | info->io.addr_data = ipmi_defaults[i].port; | |
3267 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
3268 | ||
3269 | info->io.addr = NULL; | |
3270 | info->io.regspacing = DEFAULT_REGSPACING; | |
3271 | info->io.regsize = DEFAULT_REGSPACING; | |
3272 | info->io.regshift = 0; | |
3273 | ||
2407d77a MG |
3274 | if (add_smi(info) == 0) { |
3275 | if ((try_smi_init(info)) == 0) { | |
3276 | /* Found one... */ | |
279fbd0c | 3277 | printk(KERN_INFO PFX "Found default %s" |
2407d77a MG |
3278 | " state machine at %s address 0x%lx\n", |
3279 | si_to_str[info->si_type], | |
3280 | addr_space_to_str[info->io.addr_type], | |
3281 | info->io.addr_data); | |
3282 | } else | |
3283 | cleanup_one_si(info); | |
7faefea6 YL |
3284 | } else { |
3285 | kfree(info); | |
b0defcdb CM |
3286 | } |
3287 | } | |
3288 | } | |
3289 | ||
3290 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 3291 | { |
b0defcdb | 3292 | struct smi_info *e; |
1da177e4 | 3293 | |
b0defcdb CM |
3294 | list_for_each_entry(e, &smi_infos, link) { |
3295 | if (e->io.addr_type != info->io.addr_type) | |
3296 | continue; | |
3297 | if (e->io.addr_data == info->io.addr_data) | |
3298 | return 0; | |
3299 | } | |
1da177e4 | 3300 | |
b0defcdb CM |
3301 | return 1; |
3302 | } | |
1da177e4 | 3303 | |
2407d77a | 3304 | static int add_smi(struct smi_info *new_smi) |
b0defcdb | 3305 | { |
2407d77a | 3306 | int rv = 0; |
b0defcdb | 3307 | |
279fbd0c | 3308 | printk(KERN_INFO PFX "Adding %s-specified %s state machine", |
7e50387b CM |
3309 | ipmi_addr_src_to_str(new_smi->addr_source), |
3310 | si_to_str[new_smi->si_type]); | |
d6dfd131 | 3311 | mutex_lock(&smi_infos_lock); |
b0defcdb | 3312 | if (!is_new_interface(new_smi)) { |
7bb671e3 | 3313 | printk(KERN_CONT " duplicate interface\n"); |
b0defcdb CM |
3314 | rv = -EBUSY; |
3315 | goto out_err; | |
3316 | } | |
1da177e4 | 3317 | |
2407d77a MG |
3318 | printk(KERN_CONT "\n"); |
3319 | ||
1da177e4 LT |
3320 | /* So we know not to free it unless we have allocated one. */ |
3321 | new_smi->intf = NULL; | |
3322 | new_smi->si_sm = NULL; | |
3323 | new_smi->handlers = NULL; | |
3324 | ||
2407d77a MG |
3325 | list_add_tail(&new_smi->link, &smi_infos); |
3326 | ||
3327 | out_err: | |
3328 | mutex_unlock(&smi_infos_lock); | |
3329 | return rv; | |
3330 | } | |
3331 | ||
3332 | static int try_smi_init(struct smi_info *new_smi) | |
3333 | { | |
3334 | int rv = 0; | |
3335 | int i; | |
3336 | ||
279fbd0c | 3337 | printk(KERN_INFO PFX "Trying %s-specified %s state" |
2407d77a MG |
3338 | " machine at %s address 0x%lx, slave address 0x%x," |
3339 | " irq %d\n", | |
7e50387b | 3340 | ipmi_addr_src_to_str(new_smi->addr_source), |
2407d77a MG |
3341 | si_to_str[new_smi->si_type], |
3342 | addr_space_to_str[new_smi->io.addr_type], | |
3343 | new_smi->io.addr_data, | |
3344 | new_smi->slave_addr, new_smi->irq); | |
3345 | ||
b0defcdb CM |
3346 | switch (new_smi->si_type) { |
3347 | case SI_KCS: | |
1da177e4 | 3348 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
3349 | break; |
3350 | ||
3351 | case SI_SMIC: | |
1da177e4 | 3352 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
3353 | break; |
3354 | ||
3355 | case SI_BT: | |
1da177e4 | 3356 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
3357 | break; |
3358 | ||
3359 | default: | |
1da177e4 LT |
3360 | /* No support for anything else yet. */ |
3361 | rv = -EIO; | |
3362 | goto out_err; | |
3363 | } | |
3364 | ||
3365 | /* Allocate the state machine's data and initialize it. */ | |
3366 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 3367 | if (!new_smi->si_sm) { |
279fbd0c MS |
3368 | printk(KERN_ERR PFX |
3369 | "Could not allocate state machine memory\n"); | |
1da177e4 LT |
3370 | rv = -ENOMEM; |
3371 | goto out_err; | |
3372 | } | |
3373 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
3374 | &new_smi->io); | |
3375 | ||
3376 | /* Now that we know the I/O size, we can set up the I/O. */ | |
3377 | rv = new_smi->io_setup(new_smi); | |
3378 | if (rv) { | |
279fbd0c | 3379 | printk(KERN_ERR PFX "Could not set up I/O space\n"); |
1da177e4 LT |
3380 | goto out_err; |
3381 | } | |
3382 | ||
1da177e4 LT |
3383 | /* Do low-level detection first. */ |
3384 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb | 3385 | if (new_smi->addr_source) |
279fbd0c | 3386 | printk(KERN_INFO PFX "Interface detection failed\n"); |
1da177e4 LT |
3387 | rv = -ENODEV; |
3388 | goto out_err; | |
3389 | } | |
3390 | ||
c305e3d3 CM |
3391 | /* |
3392 | * Attempt a get device id command. If it fails, we probably | |
3393 | * don't have a BMC here. | |
3394 | */ | |
1da177e4 | 3395 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
3396 | if (rv) { |
3397 | if (new_smi->addr_source) | |
279fbd0c | 3398 | printk(KERN_INFO PFX "There appears to be no BMC" |
b0defcdb | 3399 | " at this location\n"); |
1da177e4 | 3400 | goto out_err; |
b0defcdb | 3401 | } |
1da177e4 | 3402 | |
3ae0e0f9 | 3403 | setup_oem_data_handler(new_smi); |
ea94027b | 3404 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 3405 | |
1da177e4 LT |
3406 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); |
3407 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
3408 | new_smi->curr_msg = NULL; | |
3409 | atomic_set(&new_smi->req_events, 0); | |
7aefac26 | 3410 | new_smi->run_to_completion = false; |
64959e2d CM |
3411 | for (i = 0; i < SI_NUM_STATS; i++) |
3412 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 | 3413 | |
7aefac26 | 3414 | new_smi->interrupt_disabled = true; |
a9a2c44f | 3415 | atomic_set(&new_smi->stop_operation, 0); |
89986496 | 3416 | atomic_set(&new_smi->need_watch, 0); |
b0defcdb CM |
3417 | new_smi->intf_num = smi_num; |
3418 | smi_num++; | |
1da177e4 | 3419 | |
40112ae7 CM |
3420 | rv = try_enable_event_buffer(new_smi); |
3421 | if (rv == 0) | |
7aefac26 | 3422 | new_smi->has_event_buffer = true; |
40112ae7 | 3423 | |
c305e3d3 CM |
3424 | /* |
3425 | * Start clearing the flags before we enable interrupts or the | |
3426 | * timer to avoid racing with the timer. | |
3427 | */ | |
1da177e4 LT |
3428 | start_clear_flags(new_smi); |
3429 | /* IRQ is defined to be set when non-zero. */ | |
3430 | if (new_smi->irq) | |
3431 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
3432 | ||
50c812b2 | 3433 | if (!new_smi->dev) { |
c305e3d3 CM |
3434 | /* |
3435 | * If we don't already have a device from something | |
3436 | * else (like PCI), then register a new one. | |
3437 | */ | |
50c812b2 CM |
3438 | new_smi->pdev = platform_device_alloc("ipmi_si", |
3439 | new_smi->intf_num); | |
8b32b5d0 | 3440 | if (!new_smi->pdev) { |
279fbd0c MS |
3441 | printk(KERN_ERR PFX |
3442 | "Unable to allocate platform device\n"); | |
453823ba | 3443 | goto out_err; |
50c812b2 CM |
3444 | } |
3445 | new_smi->dev = &new_smi->pdev->dev; | |
fe2d5ffc | 3446 | new_smi->dev->driver = &ipmi_driver.driver; |
50c812b2 | 3447 | |
b48f5457 | 3448 | rv = platform_device_add(new_smi->pdev); |
50c812b2 | 3449 | if (rv) { |
279fbd0c MS |
3450 | printk(KERN_ERR PFX |
3451 | "Unable to register system interface device:" | |
50c812b2 CM |
3452 | " %d\n", |
3453 | rv); | |
453823ba | 3454 | goto out_err; |
50c812b2 | 3455 | } |
7aefac26 | 3456 | new_smi->dev_registered = true; |
50c812b2 CM |
3457 | } |
3458 | ||
1da177e4 LT |
3459 | rv = ipmi_register_smi(&handlers, |
3460 | new_smi, | |
50c812b2 CM |
3461 | &new_smi->device_id, |
3462 | new_smi->dev, | |
453823ba | 3463 | new_smi->slave_addr); |
1da177e4 | 3464 | if (rv) { |
279fbd0c MS |
3465 | dev_err(new_smi->dev, "Unable to register device: error %d\n", |
3466 | rv); | |
1da177e4 LT |
3467 | goto out_err_stop_timer; |
3468 | } | |
3469 | ||
3470 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
07412736 | 3471 | &smi_type_proc_ops, |
99b76233 | 3472 | new_smi); |
1da177e4 | 3473 | if (rv) { |
279fbd0c | 3474 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3475 | goto out_err_stop_timer; |
3476 | } | |
3477 | ||
3478 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
07412736 | 3479 | &smi_si_stats_proc_ops, |
99b76233 | 3480 | new_smi); |
1da177e4 | 3481 | if (rv) { |
279fbd0c | 3482 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3483 | goto out_err_stop_timer; |
3484 | } | |
3485 | ||
b361e27b | 3486 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
07412736 | 3487 | &smi_params_proc_ops, |
99b76233 | 3488 | new_smi); |
b361e27b | 3489 | if (rv) { |
279fbd0c | 3490 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
b361e27b CM |
3491 | goto out_err_stop_timer; |
3492 | } | |
3493 | ||
279fbd0c MS |
3494 | dev_info(new_smi->dev, "IPMI %s interface initialized\n", |
3495 | si_to_str[new_smi->si_type]); | |
1da177e4 LT |
3496 | |
3497 | return 0; | |
3498 | ||
3499 | out_err_stop_timer: | |
a9a2c44f CM |
3500 | atomic_inc(&new_smi->stop_operation); |
3501 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
3502 | |
3503 | out_err: | |
7aefac26 | 3504 | new_smi->interrupt_disabled = true; |
2407d77a MG |
3505 | |
3506 | if (new_smi->intf) { | |
1da177e4 | 3507 | ipmi_unregister_smi(new_smi->intf); |
2407d77a MG |
3508 | new_smi->intf = NULL; |
3509 | } | |
1da177e4 | 3510 | |
2407d77a | 3511 | if (new_smi->irq_cleanup) { |
b0defcdb | 3512 | new_smi->irq_cleanup(new_smi); |
2407d77a MG |
3513 | new_smi->irq_cleanup = NULL; |
3514 | } | |
1da177e4 | 3515 | |
c305e3d3 CM |
3516 | /* |
3517 | * Wait until we know that we are out of any interrupt | |
3518 | * handlers might have been running before we freed the | |
3519 | * interrupt. | |
3520 | */ | |
fbd568a3 | 3521 | synchronize_sched(); |
1da177e4 LT |
3522 | |
3523 | if (new_smi->si_sm) { | |
3524 | if (new_smi->handlers) | |
3525 | new_smi->handlers->cleanup(new_smi->si_sm); | |
3526 | kfree(new_smi->si_sm); | |
2407d77a | 3527 | new_smi->si_sm = NULL; |
1da177e4 | 3528 | } |
2407d77a | 3529 | if (new_smi->addr_source_cleanup) { |
b0defcdb | 3530 | new_smi->addr_source_cleanup(new_smi); |
2407d77a MG |
3531 | new_smi->addr_source_cleanup = NULL; |
3532 | } | |
3533 | if (new_smi->io_cleanup) { | |
7767e126 | 3534 | new_smi->io_cleanup(new_smi); |
2407d77a MG |
3535 | new_smi->io_cleanup = NULL; |
3536 | } | |
1da177e4 | 3537 | |
2407d77a | 3538 | if (new_smi->dev_registered) { |
50c812b2 | 3539 | platform_device_unregister(new_smi->pdev); |
7aefac26 | 3540 | new_smi->dev_registered = false; |
2407d77a | 3541 | } |
b0defcdb | 3542 | |
1da177e4 LT |
3543 | return rv; |
3544 | } | |
3545 | ||
2223cbec | 3546 | static int init_ipmi_si(void) |
1da177e4 | 3547 | { |
1da177e4 LT |
3548 | int i; |
3549 | char *str; | |
50c812b2 | 3550 | int rv; |
2407d77a | 3551 | struct smi_info *e; |
06ee4594 | 3552 | enum ipmi_addr_src type = SI_INVALID; |
1da177e4 LT |
3553 | |
3554 | if (initialized) | |
3555 | return 0; | |
3556 | initialized = 1; | |
3557 | ||
f2afae46 CM |
3558 | if (si_tryplatform) { |
3559 | rv = platform_driver_register(&ipmi_driver); | |
3560 | if (rv) { | |
3561 | printk(KERN_ERR PFX "Unable to register " | |
3562 | "driver: %d\n", rv); | |
3563 | return rv; | |
3564 | } | |
50c812b2 CM |
3565 | } |
3566 | ||
1da177e4 LT |
3567 | /* Parse out the si_type string into its components. */ |
3568 | str = si_type_str; | |
3569 | if (*str != '\0') { | |
e8b33617 | 3570 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
3571 | si_type[i] = str; |
3572 | str = strchr(str, ','); | |
3573 | if (str) { | |
3574 | *str = '\0'; | |
3575 | str++; | |
3576 | } else { | |
3577 | break; | |
3578 | } | |
3579 | } | |
3580 | } | |
3581 | ||
1fdd75bd | 3582 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 3583 | |
d8cc5267 | 3584 | /* If the user gave us a device, they presumably want us to use it */ |
a1e9c9dd | 3585 | if (!hardcode_find_bmc()) |
d8cc5267 | 3586 | return 0; |
d8cc5267 | 3587 | |
b0defcdb | 3588 | #ifdef CONFIG_PCI |
f2afae46 CM |
3589 | if (si_trypci) { |
3590 | rv = pci_register_driver(&ipmi_pci_driver); | |
3591 | if (rv) | |
3592 | printk(KERN_ERR PFX "Unable to register " | |
3593 | "PCI driver: %d\n", rv); | |
3594 | else | |
7aefac26 | 3595 | pci_registered = true; |
f2afae46 | 3596 | } |
b0defcdb CM |
3597 | #endif |
3598 | ||
754d4531 | 3599 | #ifdef CONFIG_ACPI |
d941aeae CM |
3600 | if (si_tryacpi) { |
3601 | pnp_register_driver(&ipmi_pnp_driver); | |
7aefac26 | 3602 | pnp_registered = true; |
d941aeae | 3603 | } |
754d4531 MG |
3604 | #endif |
3605 | ||
3606 | #ifdef CONFIG_DMI | |
d941aeae CM |
3607 | if (si_trydmi) |
3608 | dmi_find_bmc(); | |
754d4531 MG |
3609 | #endif |
3610 | ||
3611 | #ifdef CONFIG_ACPI | |
d941aeae CM |
3612 | if (si_tryacpi) |
3613 | spmi_find_bmc(); | |
754d4531 MG |
3614 | #endif |
3615 | ||
fdbeb7de TB |
3616 | #ifdef CONFIG_PARISC |
3617 | register_parisc_driver(&ipmi_parisc_driver); | |
7aefac26 | 3618 | parisc_registered = true; |
fdbeb7de TB |
3619 | /* poking PC IO addresses will crash machine, don't do it */ |
3620 | si_trydefaults = 0; | |
3621 | #endif | |
3622 | ||
06ee4594 MG |
3623 | /* We prefer devices with interrupts, but in the case of a machine |
3624 | with multiple BMCs we assume that there will be several instances | |
3625 | of a given type so if we succeed in registering a type then also | |
3626 | try to register everything else of the same type */ | |
d8cc5267 | 3627 | |
2407d77a MG |
3628 | mutex_lock(&smi_infos_lock); |
3629 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 MG |
3630 | /* Try to register a device if it has an IRQ and we either |
3631 | haven't successfully registered a device yet or this | |
3632 | device has the same type as one we successfully registered */ | |
3633 | if (e->irq && (!type || e->addr_source == type)) { | |
d8cc5267 | 3634 | if (!try_smi_init(e)) { |
06ee4594 | 3635 | type = e->addr_source; |
d8cc5267 MG |
3636 | } |
3637 | } | |
3638 | } | |
3639 | ||
06ee4594 MG |
3640 | /* type will only have been set if we successfully registered an si */ |
3641 | if (type) { | |
3642 | mutex_unlock(&smi_infos_lock); | |
3643 | return 0; | |
3644 | } | |
3645 | ||
d8cc5267 MG |
3646 | /* Fall back to the preferred device */ |
3647 | ||
3648 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 | 3649 | if (!e->irq && (!type || e->addr_source == type)) { |
d8cc5267 | 3650 | if (!try_smi_init(e)) { |
06ee4594 | 3651 | type = e->addr_source; |
d8cc5267 MG |
3652 | } |
3653 | } | |
2407d77a MG |
3654 | } |
3655 | mutex_unlock(&smi_infos_lock); | |
3656 | ||
06ee4594 MG |
3657 | if (type) |
3658 | return 0; | |
3659 | ||
b0defcdb | 3660 | if (si_trydefaults) { |
d6dfd131 | 3661 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3662 | if (list_empty(&smi_infos)) { |
3663 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 3664 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3665 | default_find_bmc(); |
2407d77a | 3666 | } else |
d6dfd131 | 3667 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3668 | } |
3669 | ||
d6dfd131 | 3670 | mutex_lock(&smi_infos_lock); |
b361e27b | 3671 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 3672 | mutex_unlock(&smi_infos_lock); |
d2478521 | 3673 | cleanup_ipmi_si(); |
279fbd0c MS |
3674 | printk(KERN_WARNING PFX |
3675 | "Unable to find any System Interface(s)\n"); | |
1da177e4 | 3676 | return -ENODEV; |
b0defcdb | 3677 | } else { |
d6dfd131 | 3678 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3679 | return 0; |
1da177e4 | 3680 | } |
1da177e4 LT |
3681 | } |
3682 | module_init(init_ipmi_si); | |
3683 | ||
b361e27b | 3684 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 | 3685 | { |
2407d77a | 3686 | int rv = 0; |
1da177e4 LT |
3687 | unsigned long flags; |
3688 | ||
b0defcdb | 3689 | if (!to_clean) |
1da177e4 LT |
3690 | return; |
3691 | ||
567eded9 TI |
3692 | if (to_clean->dev) |
3693 | dev_set_drvdata(to_clean->dev, NULL); | |
3694 | ||
b0defcdb CM |
3695 | list_del(&to_clean->link); |
3696 | ||
ee6cd5f8 | 3697 | /* Tell the driver that we are shutting down. */ |
a9a2c44f | 3698 | atomic_inc(&to_clean->stop_operation); |
b0defcdb | 3699 | |
c305e3d3 CM |
3700 | /* |
3701 | * Make sure the timer and thread are stopped and will not run | |
3702 | * again. | |
3703 | */ | |
a9a2c44f | 3704 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 3705 | |
c305e3d3 CM |
3706 | /* |
3707 | * Timeouts are stopped, now make sure the interrupts are off | |
3708 | * for the device. A little tricky with locks to make sure | |
3709 | * there are no races. | |
3710 | */ | |
ee6cd5f8 CM |
3711 | spin_lock_irqsave(&to_clean->si_lock, flags); |
3712 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3713 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3714 | poll(to_clean); | |
3715 | schedule_timeout_uninterruptible(1); | |
3716 | spin_lock_irqsave(&to_clean->si_lock, flags); | |
3717 | } | |
3718 | disable_si_irq(to_clean); | |
3719 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3720 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3721 | poll(to_clean); | |
3722 | schedule_timeout_uninterruptible(1); | |
3723 | } | |
3724 | ||
3725 | /* Clean up interrupts and make sure that everything is done. */ | |
3726 | if (to_clean->irq_cleanup) | |
3727 | to_clean->irq_cleanup(to_clean); | |
e8b33617 | 3728 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 3729 | poll(to_clean); |
da4cd8df | 3730 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
3731 | } |
3732 | ||
2407d77a MG |
3733 | if (to_clean->intf) |
3734 | rv = ipmi_unregister_smi(to_clean->intf); | |
3735 | ||
1da177e4 | 3736 | if (rv) { |
279fbd0c | 3737 | printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n", |
1da177e4 LT |
3738 | rv); |
3739 | } | |
3740 | ||
2407d77a MG |
3741 | if (to_clean->handlers) |
3742 | to_clean->handlers->cleanup(to_clean->si_sm); | |
1da177e4 LT |
3743 | |
3744 | kfree(to_clean->si_sm); | |
3745 | ||
b0defcdb CM |
3746 | if (to_clean->addr_source_cleanup) |
3747 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
3748 | if (to_clean->io_cleanup) |
3749 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
3750 | |
3751 | if (to_clean->dev_registered) | |
3752 | platform_device_unregister(to_clean->pdev); | |
3753 | ||
3754 | kfree(to_clean); | |
1da177e4 LT |
3755 | } |
3756 | ||
0dcf334c | 3757 | static void cleanup_ipmi_si(void) |
1da177e4 | 3758 | { |
b0defcdb | 3759 | struct smi_info *e, *tmp_e; |
1da177e4 | 3760 | |
b0defcdb | 3761 | if (!initialized) |
1da177e4 LT |
3762 | return; |
3763 | ||
b0defcdb | 3764 | #ifdef CONFIG_PCI |
56480287 MG |
3765 | if (pci_registered) |
3766 | pci_unregister_driver(&ipmi_pci_driver); | |
b0defcdb | 3767 | #endif |
27d0567a | 3768 | #ifdef CONFIG_ACPI |
561f8182 YL |
3769 | if (pnp_registered) |
3770 | pnp_unregister_driver(&ipmi_pnp_driver); | |
9e368fa0 | 3771 | #endif |
fdbeb7de TB |
3772 | #ifdef CONFIG_PARISC |
3773 | if (parisc_registered) | |
3774 | unregister_parisc_driver(&ipmi_parisc_driver); | |
3775 | #endif | |
b0defcdb | 3776 | |
a1e9c9dd | 3777 | platform_driver_unregister(&ipmi_driver); |
dba9b4f6 | 3778 | |
d6dfd131 | 3779 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3780 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
3781 | cleanup_one_si(e); | |
d6dfd131 | 3782 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3783 | } |
3784 | module_exit(cleanup_ipmi_si); | |
3785 | ||
3786 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 3787 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
3788 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
3789 | " system interfaces."); |