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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ipmi_si.c | |
3 | * | |
4 | * The interface to the IPMI driver for the system interfaces (KCS, SMIC, | |
5 | * BT). | |
6 | * | |
7 | * Author: MontaVista Software, Inc. | |
8 | * Corey Minyard <minyard@mvista.com> | |
9 | * source@mvista.com | |
10 | * | |
11 | * Copyright 2002 MontaVista Software Inc. | |
dba9b4f6 | 12 | * Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com> |
1da177e4 LT |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify it | |
15 | * under the terms of the GNU General Public License as published by the | |
16 | * Free Software Foundation; either version 2 of the License, or (at your | |
17 | * option) any later version. | |
18 | * | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
21 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
22 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
25 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
26 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
27 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
28 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
29 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License along | |
32 | * with this program; if not, write to the Free Software Foundation, Inc., | |
33 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
34 | */ | |
35 | ||
36 | /* | |
37 | * This file holds the "policy" for the interface to the SMI state | |
38 | * machine. It does the configuration, handles timers and interrupts, | |
39 | * and drives the real SMI state machine. | |
40 | */ | |
41 | ||
1da177e4 LT |
42 | #include <linux/module.h> |
43 | #include <linux/moduleparam.h> | |
1da177e4 | 44 | #include <linux/sched.h> |
07412736 | 45 | #include <linux/seq_file.h> |
1da177e4 LT |
46 | #include <linux/timer.h> |
47 | #include <linux/errno.h> | |
48 | #include <linux/spinlock.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/ioport.h> | |
ea94027b | 54 | #include <linux/notifier.h> |
b0defcdb | 55 | #include <linux/mutex.h> |
e9a705a0 | 56 | #include <linux/kthread.h> |
1da177e4 | 57 | #include <asm/irq.h> |
1da177e4 LT |
58 | #include <linux/interrupt.h> |
59 | #include <linux/rcupdate.h> | |
16f4232c | 60 | #include <linux/ipmi.h> |
1da177e4 LT |
61 | #include <linux/ipmi_smi.h> |
62 | #include <asm/io.h> | |
63 | #include "ipmi_si_sm.h" | |
b224cd3a | 64 | #include <linux/dmi.h> |
b361e27b CM |
65 | #include <linux/string.h> |
66 | #include <linux/ctype.h> | |
9e368fa0 | 67 | #include <linux/pnp.h> |
11c675ce SR |
68 | #include <linux/of_device.h> |
69 | #include <linux/of_platform.h> | |
672d8eaf RH |
70 | #include <linux/of_address.h> |
71 | #include <linux/of_irq.h> | |
dba9b4f6 | 72 | |
fdbeb7de TB |
73 | #ifdef CONFIG_PARISC |
74 | #include <asm/hardware.h> /* for register_parisc_driver() stuff */ | |
75 | #include <asm/parisc-device.h> | |
76 | #endif | |
77 | ||
b361e27b | 78 | #define PFX "ipmi_si: " |
1da177e4 LT |
79 | |
80 | /* Measure times between events in the driver. */ | |
81 | #undef DEBUG_TIMING | |
82 | ||
83 | /* Call every 10 ms. */ | |
84 | #define SI_TIMEOUT_TIME_USEC 10000 | |
85 | #define SI_USEC_PER_JIFFY (1000000/HZ) | |
86 | #define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY) | |
87 | #define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a | |
c305e3d3 | 88 | short timeout */ |
1da177e4 LT |
89 | |
90 | enum si_intf_state { | |
91 | SI_NORMAL, | |
92 | SI_GETTING_FLAGS, | |
93 | SI_GETTING_EVENTS, | |
94 | SI_CLEARING_FLAGS, | |
95 | SI_CLEARING_FLAGS_THEN_SET_IRQ, | |
96 | SI_GETTING_MESSAGES, | |
97 | SI_ENABLE_INTERRUPTS1, | |
ee6cd5f8 CM |
98 | SI_ENABLE_INTERRUPTS2, |
99 | SI_DISABLE_INTERRUPTS1, | |
100 | SI_DISABLE_INTERRUPTS2 | |
1da177e4 LT |
101 | /* FIXME - add watchdog stuff. */ |
102 | }; | |
103 | ||
9dbf68f9 CM |
104 | /* Some BT-specific defines we need here. */ |
105 | #define IPMI_BT_INTMASK_REG 2 | |
106 | #define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2 | |
107 | #define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1 | |
108 | ||
1da177e4 LT |
109 | enum si_type { |
110 | SI_KCS, SI_SMIC, SI_BT | |
111 | }; | |
b361e27b | 112 | static char *si_to_str[] = { "kcs", "smic", "bt" }; |
1da177e4 | 113 | |
5fedc4a2 MG |
114 | static char *ipmi_addr_src_to_str[] = { NULL, "hotmod", "hardcoded", "SPMI", |
115 | "ACPI", "SMBIOS", "PCI", | |
116 | "device-tree", "default" }; | |
117 | ||
50c812b2 CM |
118 | #define DEVICE_NAME "ipmi_si" |
119 | ||
a1e9c9dd | 120 | static struct platform_driver ipmi_driver; |
64959e2d CM |
121 | |
122 | /* | |
123 | * Indexes into stats[] in smi_info below. | |
124 | */ | |
ba8ff1c6 CM |
125 | enum si_stat_indexes { |
126 | /* | |
127 | * Number of times the driver requested a timer while an operation | |
128 | * was in progress. | |
129 | */ | |
130 | SI_STAT_short_timeouts = 0, | |
131 | ||
132 | /* | |
133 | * Number of times the driver requested a timer while nothing was in | |
134 | * progress. | |
135 | */ | |
136 | SI_STAT_long_timeouts, | |
137 | ||
138 | /* Number of times the interface was idle while being polled. */ | |
139 | SI_STAT_idles, | |
140 | ||
141 | /* Number of interrupts the driver handled. */ | |
142 | SI_STAT_interrupts, | |
143 | ||
144 | /* Number of time the driver got an ATTN from the hardware. */ | |
145 | SI_STAT_attentions, | |
64959e2d | 146 | |
ba8ff1c6 CM |
147 | /* Number of times the driver requested flags from the hardware. */ |
148 | SI_STAT_flag_fetches, | |
149 | ||
150 | /* Number of times the hardware didn't follow the state machine. */ | |
151 | SI_STAT_hosed_count, | |
152 | ||
153 | /* Number of completed messages. */ | |
154 | SI_STAT_complete_transactions, | |
155 | ||
156 | /* Number of IPMI events received from the hardware. */ | |
157 | SI_STAT_events, | |
158 | ||
159 | /* Number of watchdog pretimeouts. */ | |
160 | SI_STAT_watchdog_pretimeouts, | |
161 | ||
b3834be5 | 162 | /* Number of asynchronous messages received. */ |
ba8ff1c6 CM |
163 | SI_STAT_incoming_messages, |
164 | ||
165 | ||
166 | /* This *must* remain last, add new values above this. */ | |
167 | SI_NUM_STATS | |
168 | }; | |
64959e2d | 169 | |
c305e3d3 | 170 | struct smi_info { |
a9a2c44f | 171 | int intf_num; |
1da177e4 LT |
172 | ipmi_smi_t intf; |
173 | struct si_sm_data *si_sm; | |
174 | struct si_sm_handlers *handlers; | |
175 | enum si_type si_type; | |
176 | spinlock_t si_lock; | |
1da177e4 LT |
177 | struct list_head xmit_msgs; |
178 | struct list_head hp_xmit_msgs; | |
179 | struct ipmi_smi_msg *curr_msg; | |
180 | enum si_intf_state si_state; | |
181 | ||
c305e3d3 CM |
182 | /* |
183 | * Used to handle the various types of I/O that can occur with | |
184 | * IPMI | |
185 | */ | |
1da177e4 LT |
186 | struct si_sm_io io; |
187 | int (*io_setup)(struct smi_info *info); | |
188 | void (*io_cleanup)(struct smi_info *info); | |
189 | int (*irq_setup)(struct smi_info *info); | |
190 | void (*irq_cleanup)(struct smi_info *info); | |
191 | unsigned int io_size; | |
5fedc4a2 | 192 | enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */ |
b0defcdb CM |
193 | void (*addr_source_cleanup)(struct smi_info *info); |
194 | void *addr_source_data; | |
1da177e4 | 195 | |
c305e3d3 CM |
196 | /* |
197 | * Per-OEM handler, called from handle_flags(). Returns 1 | |
198 | * when handle_flags() needs to be re-run or 0 indicating it | |
199 | * set si_state itself. | |
200 | */ | |
3ae0e0f9 CM |
201 | int (*oem_data_avail_handler)(struct smi_info *smi_info); |
202 | ||
c305e3d3 CM |
203 | /* |
204 | * Flags from the last GET_MSG_FLAGS command, used when an ATTN | |
205 | * is set to hold the flags until we are done handling everything | |
206 | * from the flags. | |
207 | */ | |
1da177e4 LT |
208 | #define RECEIVE_MSG_AVAIL 0x01 |
209 | #define EVENT_MSG_BUFFER_FULL 0x02 | |
210 | #define WDT_PRE_TIMEOUT_INT 0x08 | |
3ae0e0f9 CM |
211 | #define OEM0_DATA_AVAIL 0x20 |
212 | #define OEM1_DATA_AVAIL 0x40 | |
213 | #define OEM2_DATA_AVAIL 0x80 | |
214 | #define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \ | |
c305e3d3 CM |
215 | OEM1_DATA_AVAIL | \ |
216 | OEM2_DATA_AVAIL) | |
1da177e4 LT |
217 | unsigned char msg_flags; |
218 | ||
40112ae7 CM |
219 | /* Does the BMC have an event buffer? */ |
220 | char has_event_buffer; | |
221 | ||
c305e3d3 CM |
222 | /* |
223 | * If set to true, this will request events the next time the | |
224 | * state machine is idle. | |
225 | */ | |
1da177e4 LT |
226 | atomic_t req_events; |
227 | ||
c305e3d3 CM |
228 | /* |
229 | * If true, run the state machine to completion on every send | |
230 | * call. Generally used after a panic to make sure stuff goes | |
231 | * out. | |
232 | */ | |
1da177e4 LT |
233 | int run_to_completion; |
234 | ||
235 | /* The I/O port of an SI interface. */ | |
236 | int port; | |
237 | ||
c305e3d3 CM |
238 | /* |
239 | * The space between start addresses of the two ports. For | |
240 | * instance, if the first port is 0xca2 and the spacing is 4, then | |
241 | * the second port is 0xca6. | |
242 | */ | |
1da177e4 LT |
243 | unsigned int spacing; |
244 | ||
245 | /* zero if no irq; */ | |
246 | int irq; | |
247 | ||
248 | /* The timer for this si. */ | |
249 | struct timer_list si_timer; | |
250 | ||
48e8ac29 BS |
251 | /* This flag is set, if the timer is running (timer_pending() isn't enough) */ |
252 | bool timer_running; | |
253 | ||
1da177e4 LT |
254 | /* The time (in jiffies) the last timeout occurred at. */ |
255 | unsigned long last_timeout_jiffies; | |
256 | ||
257 | /* Used to gracefully stop the timer without race conditions. */ | |
a9a2c44f | 258 | atomic_t stop_operation; |
1da177e4 | 259 | |
89986496 CM |
260 | /* Are we waiting for the events, pretimeouts, received msgs? */ |
261 | atomic_t need_watch; | |
262 | ||
c305e3d3 CM |
263 | /* |
264 | * The driver will disable interrupts when it gets into a | |
265 | * situation where it cannot handle messages due to lack of | |
266 | * memory. Once that situation clears up, it will re-enable | |
267 | * interrupts. | |
268 | */ | |
1da177e4 LT |
269 | int interrupt_disabled; |
270 | ||
50c812b2 | 271 | /* From the get device id response... */ |
3ae0e0f9 | 272 | struct ipmi_device_id device_id; |
1da177e4 | 273 | |
50c812b2 CM |
274 | /* Driver model stuff. */ |
275 | struct device *dev; | |
276 | struct platform_device *pdev; | |
277 | ||
c305e3d3 CM |
278 | /* |
279 | * True if we allocated the device, false if it came from | |
280 | * someplace else (like PCI). | |
281 | */ | |
50c812b2 CM |
282 | int dev_registered; |
283 | ||
1da177e4 LT |
284 | /* Slave address, could be reported from DMI. */ |
285 | unsigned char slave_addr; | |
286 | ||
287 | /* Counters and things for the proc filesystem. */ | |
64959e2d | 288 | atomic_t stats[SI_NUM_STATS]; |
a9a2c44f | 289 | |
c305e3d3 | 290 | struct task_struct *thread; |
b0defcdb CM |
291 | |
292 | struct list_head link; | |
16f4232c | 293 | union ipmi_smi_info_union addr_info; |
1da177e4 LT |
294 | }; |
295 | ||
64959e2d CM |
296 | #define smi_inc_stat(smi, stat) \ |
297 | atomic_inc(&(smi)->stats[SI_STAT_ ## stat]) | |
298 | #define smi_get_stat(smi, stat) \ | |
299 | ((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat])) | |
300 | ||
a51f4a81 CM |
301 | #define SI_MAX_PARMS 4 |
302 | ||
303 | static int force_kipmid[SI_MAX_PARMS]; | |
304 | static int num_force_kipmid; | |
56480287 MG |
305 | #ifdef CONFIG_PCI |
306 | static int pci_registered; | |
307 | #endif | |
561f8182 YL |
308 | #ifdef CONFIG_ACPI |
309 | static int pnp_registered; | |
310 | #endif | |
fdbeb7de TB |
311 | #ifdef CONFIG_PARISC |
312 | static int parisc_registered; | |
313 | #endif | |
a51f4a81 | 314 | |
ae74e823 MW |
315 | static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; |
316 | static int num_max_busy_us; | |
317 | ||
b361e27b CM |
318 | static int unload_when_empty = 1; |
319 | ||
2407d77a | 320 | static int add_smi(struct smi_info *smi); |
b0defcdb | 321 | static int try_smi_init(struct smi_info *smi); |
b361e27b | 322 | static void cleanup_one_si(struct smi_info *to_clean); |
d2478521 | 323 | static void cleanup_ipmi_si(void); |
b0defcdb | 324 | |
e041c683 | 325 | static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); |
c305e3d3 | 326 | static int register_xaction_notifier(struct notifier_block *nb) |
ea94027b | 327 | { |
e041c683 | 328 | return atomic_notifier_chain_register(&xaction_notifier_list, nb); |
ea94027b CM |
329 | } |
330 | ||
1da177e4 LT |
331 | static void deliver_recv_msg(struct smi_info *smi_info, |
332 | struct ipmi_smi_msg *msg) | |
333 | { | |
7adf579c CM |
334 | /* Deliver the message to the upper layer. */ |
335 | ipmi_smi_msg_received(smi_info->intf, msg); | |
1da177e4 LT |
336 | } |
337 | ||
4d7cbac7 | 338 | static void return_hosed_msg(struct smi_info *smi_info, int cCode) |
1da177e4 LT |
339 | { |
340 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
341 | ||
4d7cbac7 CM |
342 | if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED) |
343 | cCode = IPMI_ERR_UNSPECIFIED; | |
344 | /* else use it as is */ | |
345 | ||
25985edc | 346 | /* Make it a response */ |
1da177e4 LT |
347 | msg->rsp[0] = msg->data[0] | 4; |
348 | msg->rsp[1] = msg->data[1]; | |
4d7cbac7 | 349 | msg->rsp[2] = cCode; |
1da177e4 LT |
350 | msg->rsp_size = 3; |
351 | ||
352 | smi_info->curr_msg = NULL; | |
353 | deliver_recv_msg(smi_info, msg); | |
354 | } | |
355 | ||
356 | static enum si_sm_result start_next_msg(struct smi_info *smi_info) | |
357 | { | |
358 | int rv; | |
359 | struct list_head *entry = NULL; | |
360 | #ifdef DEBUG_TIMING | |
361 | struct timeval t; | |
362 | #endif | |
363 | ||
1da177e4 | 364 | /* Pick the high priority queue first. */ |
b0defcdb | 365 | if (!list_empty(&(smi_info->hp_xmit_msgs))) { |
1da177e4 | 366 | entry = smi_info->hp_xmit_msgs.next; |
b0defcdb | 367 | } else if (!list_empty(&(smi_info->xmit_msgs))) { |
1da177e4 LT |
368 | entry = smi_info->xmit_msgs.next; |
369 | } | |
370 | ||
b0defcdb | 371 | if (!entry) { |
1da177e4 LT |
372 | smi_info->curr_msg = NULL; |
373 | rv = SI_SM_IDLE; | |
374 | } else { | |
375 | int err; | |
376 | ||
377 | list_del(entry); | |
378 | smi_info->curr_msg = list_entry(entry, | |
379 | struct ipmi_smi_msg, | |
380 | link); | |
381 | #ifdef DEBUG_TIMING | |
382 | do_gettimeofday(&t); | |
c305e3d3 | 383 | printk(KERN_DEBUG "**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 | 384 | #endif |
e041c683 AS |
385 | err = atomic_notifier_call_chain(&xaction_notifier_list, |
386 | 0, smi_info); | |
ea94027b CM |
387 | if (err & NOTIFY_STOP_MASK) { |
388 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
389 | goto out; | |
390 | } | |
1da177e4 LT |
391 | err = smi_info->handlers->start_transaction( |
392 | smi_info->si_sm, | |
393 | smi_info->curr_msg->data, | |
394 | smi_info->curr_msg->data_size); | |
c305e3d3 | 395 | if (err) |
4d7cbac7 | 396 | return_hosed_msg(smi_info, err); |
1da177e4 LT |
397 | |
398 | rv = SI_SM_CALL_WITHOUT_DELAY; | |
399 | } | |
c305e3d3 | 400 | out: |
1da177e4 LT |
401 | return rv; |
402 | } | |
403 | ||
404 | static void start_enable_irq(struct smi_info *smi_info) | |
405 | { | |
406 | unsigned char msg[2]; | |
407 | ||
c305e3d3 CM |
408 | /* |
409 | * If we are enabling interrupts, we have to tell the | |
410 | * BMC to use them. | |
411 | */ | |
1da177e4 LT |
412 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
413 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
414 | ||
415 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
416 | smi_info->si_state = SI_ENABLE_INTERRUPTS1; | |
417 | } | |
418 | ||
ee6cd5f8 CM |
419 | static void start_disable_irq(struct smi_info *smi_info) |
420 | { | |
421 | unsigned char msg[2]; | |
422 | ||
423 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
424 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
425 | ||
426 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
427 | smi_info->si_state = SI_DISABLE_INTERRUPTS1; | |
428 | } | |
429 | ||
1da177e4 LT |
430 | static void start_clear_flags(struct smi_info *smi_info) |
431 | { | |
432 | unsigned char msg[3]; | |
433 | ||
434 | /* Make sure the watchdog pre-timeout flag is not set at startup. */ | |
435 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
436 | msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD; | |
437 | msg[2] = WDT_PRE_TIMEOUT_INT; | |
438 | ||
439 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
440 | smi_info->si_state = SI_CLEARING_FLAGS; | |
441 | } | |
442 | ||
48e8ac29 BS |
443 | static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val) |
444 | { | |
445 | smi_info->last_timeout_jiffies = jiffies; | |
446 | mod_timer(&smi_info->si_timer, new_val); | |
447 | smi_info->timer_running = true; | |
448 | } | |
449 | ||
c305e3d3 CM |
450 | /* |
451 | * When we have a situtaion where we run out of memory and cannot | |
452 | * allocate messages, we just leave them in the BMC and run the system | |
453 | * polled until we can allocate some memory. Once we have some | |
454 | * memory, we will re-enable the interrupt. | |
455 | */ | |
1da177e4 LT |
456 | static inline void disable_si_irq(struct smi_info *smi_info) |
457 | { | |
b0defcdb | 458 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
ee6cd5f8 | 459 | start_disable_irq(smi_info); |
1da177e4 | 460 | smi_info->interrupt_disabled = 1; |
ea4078ca | 461 | if (!atomic_read(&smi_info->stop_operation)) |
48e8ac29 | 462 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); |
1da177e4 LT |
463 | } |
464 | } | |
465 | ||
466 | static inline void enable_si_irq(struct smi_info *smi_info) | |
467 | { | |
468 | if ((smi_info->irq) && (smi_info->interrupt_disabled)) { | |
ee6cd5f8 | 469 | start_enable_irq(smi_info); |
1da177e4 LT |
470 | smi_info->interrupt_disabled = 0; |
471 | } | |
472 | } | |
473 | ||
474 | static void handle_flags(struct smi_info *smi_info) | |
475 | { | |
3ae0e0f9 | 476 | retry: |
1da177e4 LT |
477 | if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { |
478 | /* Watchdog pre-timeout */ | |
64959e2d | 479 | smi_inc_stat(smi_info, watchdog_pretimeouts); |
1da177e4 LT |
480 | |
481 | start_clear_flags(smi_info); | |
482 | smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; | |
1da177e4 | 483 | ipmi_smi_watchdog_pretimeout(smi_info->intf); |
1da177e4 LT |
484 | } else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) { |
485 | /* Messages available. */ | |
486 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 487 | if (!smi_info->curr_msg) { |
1da177e4 LT |
488 | disable_si_irq(smi_info); |
489 | smi_info->si_state = SI_NORMAL; | |
490 | return; | |
491 | } | |
492 | enable_si_irq(smi_info); | |
493 | ||
494 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
495 | smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD; | |
496 | smi_info->curr_msg->data_size = 2; | |
497 | ||
498 | smi_info->handlers->start_transaction( | |
499 | smi_info->si_sm, | |
500 | smi_info->curr_msg->data, | |
501 | smi_info->curr_msg->data_size); | |
502 | smi_info->si_state = SI_GETTING_MESSAGES; | |
503 | } else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) { | |
504 | /* Events available. */ | |
505 | smi_info->curr_msg = ipmi_alloc_smi_msg(); | |
b0defcdb | 506 | if (!smi_info->curr_msg) { |
1da177e4 LT |
507 | disable_si_irq(smi_info); |
508 | smi_info->si_state = SI_NORMAL; | |
509 | return; | |
510 | } | |
511 | enable_si_irq(smi_info); | |
512 | ||
513 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
514 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
515 | smi_info->curr_msg->data_size = 2; | |
516 | ||
517 | smi_info->handlers->start_transaction( | |
518 | smi_info->si_sm, | |
519 | smi_info->curr_msg->data, | |
520 | smi_info->curr_msg->data_size); | |
521 | smi_info->si_state = SI_GETTING_EVENTS; | |
4064d5ef | 522 | } else if (smi_info->msg_flags & OEM_DATA_AVAIL && |
c305e3d3 | 523 | smi_info->oem_data_avail_handler) { |
4064d5ef CM |
524 | if (smi_info->oem_data_avail_handler(smi_info)) |
525 | goto retry; | |
c305e3d3 | 526 | } else |
1da177e4 | 527 | smi_info->si_state = SI_NORMAL; |
1da177e4 LT |
528 | } |
529 | ||
530 | static void handle_transaction_done(struct smi_info *smi_info) | |
531 | { | |
532 | struct ipmi_smi_msg *msg; | |
533 | #ifdef DEBUG_TIMING | |
534 | struct timeval t; | |
535 | ||
536 | do_gettimeofday(&t); | |
c305e3d3 | 537 | printk(KERN_DEBUG "**Done: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
538 | #endif |
539 | switch (smi_info->si_state) { | |
540 | case SI_NORMAL: | |
b0defcdb | 541 | if (!smi_info->curr_msg) |
1da177e4 LT |
542 | break; |
543 | ||
544 | smi_info->curr_msg->rsp_size | |
545 | = smi_info->handlers->get_result( | |
546 | smi_info->si_sm, | |
547 | smi_info->curr_msg->rsp, | |
548 | IPMI_MAX_MSG_LENGTH); | |
549 | ||
c305e3d3 CM |
550 | /* |
551 | * Do this here becase deliver_recv_msg() releases the | |
552 | * lock, and a new message can be put in during the | |
553 | * time the lock is released. | |
554 | */ | |
1da177e4 LT |
555 | msg = smi_info->curr_msg; |
556 | smi_info->curr_msg = NULL; | |
557 | deliver_recv_msg(smi_info, msg); | |
558 | break; | |
559 | ||
560 | case SI_GETTING_FLAGS: | |
561 | { | |
562 | unsigned char msg[4]; | |
563 | unsigned int len; | |
564 | ||
565 | /* We got the flags from the SMI, now handle them. */ | |
566 | len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
567 | if (msg[2] != 0) { | |
c305e3d3 | 568 | /* Error fetching flags, just give up for now. */ |
1da177e4 LT |
569 | smi_info->si_state = SI_NORMAL; |
570 | } else if (len < 4) { | |
c305e3d3 CM |
571 | /* |
572 | * Hmm, no flags. That's technically illegal, but | |
573 | * don't use uninitialized data. | |
574 | */ | |
1da177e4 LT |
575 | smi_info->si_state = SI_NORMAL; |
576 | } else { | |
577 | smi_info->msg_flags = msg[3]; | |
578 | handle_flags(smi_info); | |
579 | } | |
580 | break; | |
581 | } | |
582 | ||
583 | case SI_CLEARING_FLAGS: | |
584 | case SI_CLEARING_FLAGS_THEN_SET_IRQ: | |
585 | { | |
586 | unsigned char msg[3]; | |
587 | ||
588 | /* We cleared the flags. */ | |
589 | smi_info->handlers->get_result(smi_info->si_sm, msg, 3); | |
590 | if (msg[2] != 0) { | |
591 | /* Error clearing flags */ | |
279fbd0c MS |
592 | dev_warn(smi_info->dev, |
593 | "Error clearing flags: %2.2x\n", msg[2]); | |
1da177e4 LT |
594 | } |
595 | if (smi_info->si_state == SI_CLEARING_FLAGS_THEN_SET_IRQ) | |
596 | start_enable_irq(smi_info); | |
597 | else | |
598 | smi_info->si_state = SI_NORMAL; | |
599 | break; | |
600 | } | |
601 | ||
602 | case SI_GETTING_EVENTS: | |
603 | { | |
604 | smi_info->curr_msg->rsp_size | |
605 | = smi_info->handlers->get_result( | |
606 | smi_info->si_sm, | |
607 | smi_info->curr_msg->rsp, | |
608 | IPMI_MAX_MSG_LENGTH); | |
609 | ||
c305e3d3 CM |
610 | /* |
611 | * Do this here becase deliver_recv_msg() releases the | |
612 | * lock, and a new message can be put in during the | |
613 | * time the lock is released. | |
614 | */ | |
1da177e4 LT |
615 | msg = smi_info->curr_msg; |
616 | smi_info->curr_msg = NULL; | |
617 | if (msg->rsp[2] != 0) { | |
618 | /* Error getting event, probably done. */ | |
619 | msg->done(msg); | |
620 | ||
621 | /* Take off the event flag. */ | |
622 | smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; | |
623 | handle_flags(smi_info); | |
624 | } else { | |
64959e2d | 625 | smi_inc_stat(smi_info, events); |
1da177e4 | 626 | |
c305e3d3 CM |
627 | /* |
628 | * Do this before we deliver the message | |
629 | * because delivering the message releases the | |
630 | * lock and something else can mess with the | |
631 | * state. | |
632 | */ | |
1da177e4 LT |
633 | handle_flags(smi_info); |
634 | ||
635 | deliver_recv_msg(smi_info, msg); | |
636 | } | |
637 | break; | |
638 | } | |
639 | ||
640 | case SI_GETTING_MESSAGES: | |
641 | { | |
642 | smi_info->curr_msg->rsp_size | |
643 | = smi_info->handlers->get_result( | |
644 | smi_info->si_sm, | |
645 | smi_info->curr_msg->rsp, | |
646 | IPMI_MAX_MSG_LENGTH); | |
647 | ||
c305e3d3 CM |
648 | /* |
649 | * Do this here becase deliver_recv_msg() releases the | |
650 | * lock, and a new message can be put in during the | |
651 | * time the lock is released. | |
652 | */ | |
1da177e4 LT |
653 | msg = smi_info->curr_msg; |
654 | smi_info->curr_msg = NULL; | |
655 | if (msg->rsp[2] != 0) { | |
656 | /* Error getting event, probably done. */ | |
657 | msg->done(msg); | |
658 | ||
659 | /* Take off the msg flag. */ | |
660 | smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; | |
661 | handle_flags(smi_info); | |
662 | } else { | |
64959e2d | 663 | smi_inc_stat(smi_info, incoming_messages); |
1da177e4 | 664 | |
c305e3d3 CM |
665 | /* |
666 | * Do this before we deliver the message | |
667 | * because delivering the message releases the | |
668 | * lock and something else can mess with the | |
669 | * state. | |
670 | */ | |
1da177e4 LT |
671 | handle_flags(smi_info); |
672 | ||
673 | deliver_recv_msg(smi_info, msg); | |
674 | } | |
675 | break; | |
676 | } | |
677 | ||
678 | case SI_ENABLE_INTERRUPTS1: | |
679 | { | |
680 | unsigned char msg[4]; | |
681 | ||
682 | /* We got the flags from the SMI, now handle them. */ | |
683 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
684 | if (msg[2] != 0) { | |
0849bfec CM |
685 | dev_warn(smi_info->dev, |
686 | "Couldn't get irq info: %x.\n", msg[2]); | |
687 | dev_warn(smi_info->dev, | |
688 | "Maybe ok, but ipmi might run very slowly.\n"); | |
1da177e4 LT |
689 | smi_info->si_state = SI_NORMAL; |
690 | } else { | |
691 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
692 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
ee6cd5f8 CM |
693 | msg[2] = (msg[3] | |
694 | IPMI_BMC_RCV_MSG_INTR | | |
695 | IPMI_BMC_EVT_MSG_INTR); | |
1da177e4 LT |
696 | smi_info->handlers->start_transaction( |
697 | smi_info->si_sm, msg, 3); | |
698 | smi_info->si_state = SI_ENABLE_INTERRUPTS2; | |
699 | } | |
700 | break; | |
701 | } | |
702 | ||
703 | case SI_ENABLE_INTERRUPTS2: | |
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); | |
0849bfec CM |
709 | if (msg[2] != 0) { |
710 | dev_warn(smi_info->dev, | |
711 | "Couldn't set irq info: %x.\n", msg[2]); | |
712 | dev_warn(smi_info->dev, | |
713 | "Maybe ok, but ipmi might run very slowly.\n"); | |
714 | } else | |
ea4078ca | 715 | smi_info->interrupt_disabled = 0; |
1da177e4 LT |
716 | smi_info->si_state = SI_NORMAL; |
717 | break; | |
718 | } | |
ee6cd5f8 CM |
719 | |
720 | case SI_DISABLE_INTERRUPTS1: | |
721 | { | |
722 | unsigned char msg[4]; | |
723 | ||
724 | /* We got the flags from the SMI, now handle them. */ | |
725 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
726 | if (msg[2] != 0) { | |
279fbd0c MS |
727 | dev_warn(smi_info->dev, "Could not disable interrupts" |
728 | ", failed get.\n"); | |
ee6cd5f8 CM |
729 | smi_info->si_state = SI_NORMAL; |
730 | } else { | |
731 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); | |
732 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
733 | msg[2] = (msg[3] & | |
734 | ~(IPMI_BMC_RCV_MSG_INTR | | |
735 | IPMI_BMC_EVT_MSG_INTR)); | |
736 | smi_info->handlers->start_transaction( | |
737 | smi_info->si_sm, msg, 3); | |
738 | smi_info->si_state = SI_DISABLE_INTERRUPTS2; | |
739 | } | |
740 | break; | |
741 | } | |
742 | ||
743 | case SI_DISABLE_INTERRUPTS2: | |
744 | { | |
745 | unsigned char msg[4]; | |
746 | ||
747 | /* We got the flags from the SMI, now handle them. */ | |
748 | smi_info->handlers->get_result(smi_info->si_sm, msg, 4); | |
749 | if (msg[2] != 0) { | |
279fbd0c MS |
750 | dev_warn(smi_info->dev, "Could not disable interrupts" |
751 | ", failed set.\n"); | |
ee6cd5f8 CM |
752 | } |
753 | smi_info->si_state = SI_NORMAL; | |
754 | break; | |
755 | } | |
1da177e4 LT |
756 | } |
757 | } | |
758 | ||
c305e3d3 CM |
759 | /* |
760 | * Called on timeouts and events. Timeouts should pass the elapsed | |
761 | * time, interrupts should pass in zero. Must be called with | |
762 | * si_lock held and interrupts disabled. | |
763 | */ | |
1da177e4 LT |
764 | static enum si_sm_result smi_event_handler(struct smi_info *smi_info, |
765 | int time) | |
766 | { | |
767 | enum si_sm_result si_sm_result; | |
768 | ||
769 | restart: | |
c305e3d3 CM |
770 | /* |
771 | * There used to be a loop here that waited a little while | |
772 | * (around 25us) before giving up. That turned out to be | |
773 | * pointless, the minimum delays I was seeing were in the 300us | |
774 | * range, which is far too long to wait in an interrupt. So | |
775 | * we just run until the state machine tells us something | |
776 | * happened or it needs a delay. | |
777 | */ | |
1da177e4 LT |
778 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, time); |
779 | time = 0; | |
780 | while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY) | |
1da177e4 | 781 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); |
1da177e4 | 782 | |
c305e3d3 | 783 | if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { |
64959e2d | 784 | smi_inc_stat(smi_info, complete_transactions); |
1da177e4 LT |
785 | |
786 | handle_transaction_done(smi_info); | |
787 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 788 | } else if (si_sm_result == SI_SM_HOSED) { |
64959e2d | 789 | smi_inc_stat(smi_info, hosed_count); |
1da177e4 | 790 | |
c305e3d3 CM |
791 | /* |
792 | * Do the before return_hosed_msg, because that | |
793 | * releases the lock. | |
794 | */ | |
1da177e4 LT |
795 | smi_info->si_state = SI_NORMAL; |
796 | if (smi_info->curr_msg != NULL) { | |
c305e3d3 CM |
797 | /* |
798 | * If we were handling a user message, format | |
799 | * a response to send to the upper layer to | |
800 | * tell it about the error. | |
801 | */ | |
4d7cbac7 | 802 | return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED); |
1da177e4 LT |
803 | } |
804 | si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
805 | } | |
806 | ||
4ea18425 CM |
807 | /* |
808 | * We prefer handling attn over new messages. But don't do | |
809 | * this if there is not yet an upper layer to handle anything. | |
810 | */ | |
c305e3d3 | 811 | if (likely(smi_info->intf) && si_sm_result == SI_SM_ATTN) { |
1da177e4 LT |
812 | unsigned char msg[2]; |
813 | ||
64959e2d | 814 | smi_inc_stat(smi_info, attentions); |
1da177e4 | 815 | |
c305e3d3 CM |
816 | /* |
817 | * Got a attn, send down a get message flags to see | |
818 | * what's causing it. It would be better to handle | |
819 | * this in the upper layer, but due to the way | |
820 | * interrupts work with the SMI, that's not really | |
821 | * possible. | |
822 | */ | |
1da177e4 LT |
823 | msg[0] = (IPMI_NETFN_APP_REQUEST << 2); |
824 | msg[1] = IPMI_GET_MSG_FLAGS_CMD; | |
825 | ||
826 | smi_info->handlers->start_transaction( | |
827 | smi_info->si_sm, msg, 2); | |
828 | smi_info->si_state = SI_GETTING_FLAGS; | |
829 | goto restart; | |
830 | } | |
831 | ||
832 | /* If we are currently idle, try to start the next message. */ | |
833 | if (si_sm_result == SI_SM_IDLE) { | |
64959e2d | 834 | smi_inc_stat(smi_info, idles); |
1da177e4 LT |
835 | |
836 | si_sm_result = start_next_msg(smi_info); | |
837 | if (si_sm_result != SI_SM_IDLE) | |
838 | goto restart; | |
c305e3d3 | 839 | } |
1da177e4 LT |
840 | |
841 | if ((si_sm_result == SI_SM_IDLE) | |
c305e3d3 CM |
842 | && (atomic_read(&smi_info->req_events))) { |
843 | /* | |
844 | * We are idle and the upper layer requested that I fetch | |
845 | * events, so do so. | |
846 | */ | |
55162fb1 | 847 | atomic_set(&smi_info->req_events, 0); |
1da177e4 | 848 | |
55162fb1 CM |
849 | smi_info->curr_msg = ipmi_alloc_smi_msg(); |
850 | if (!smi_info->curr_msg) | |
851 | goto out; | |
1da177e4 | 852 | |
55162fb1 CM |
853 | smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2); |
854 | smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD; | |
855 | smi_info->curr_msg->data_size = 2; | |
1da177e4 LT |
856 | |
857 | smi_info->handlers->start_transaction( | |
55162fb1 CM |
858 | smi_info->si_sm, |
859 | smi_info->curr_msg->data, | |
860 | smi_info->curr_msg->data_size); | |
861 | smi_info->si_state = SI_GETTING_EVENTS; | |
1da177e4 LT |
862 | goto restart; |
863 | } | |
55162fb1 | 864 | out: |
1da177e4 LT |
865 | return si_sm_result; |
866 | } | |
867 | ||
89986496 CM |
868 | static void check_start_timer_thread(struct smi_info *smi_info) |
869 | { | |
870 | if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) { | |
871 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); | |
872 | ||
873 | if (smi_info->thread) | |
874 | wake_up_process(smi_info->thread); | |
875 | ||
876 | start_next_msg(smi_info); | |
877 | smi_event_handler(smi_info, 0); | |
878 | } | |
879 | } | |
880 | ||
1da177e4 LT |
881 | static void sender(void *send_info, |
882 | struct ipmi_smi_msg *msg, | |
883 | int priority) | |
884 | { | |
885 | struct smi_info *smi_info = send_info; | |
886 | enum si_sm_result result; | |
887 | unsigned long flags; | |
888 | #ifdef DEBUG_TIMING | |
889 | struct timeval t; | |
890 | #endif | |
891 | ||
b361e27b CM |
892 | if (atomic_read(&smi_info->stop_operation)) { |
893 | msg->rsp[0] = msg->data[0] | 4; | |
894 | msg->rsp[1] = msg->data[1]; | |
895 | msg->rsp[2] = IPMI_ERR_UNSPECIFIED; | |
896 | msg->rsp_size = 3; | |
897 | deliver_recv_msg(smi_info, msg); | |
898 | return; | |
899 | } | |
900 | ||
1da177e4 LT |
901 | #ifdef DEBUG_TIMING |
902 | do_gettimeofday(&t); | |
903 | printk("**Enqueue: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
904 | #endif | |
905 | ||
906 | if (smi_info->run_to_completion) { | |
bda4c30a CM |
907 | /* |
908 | * If we are running to completion, then throw it in | |
909 | * the list and run transactions until everything is | |
910 | * clear. Priority doesn't matter here. | |
911 | */ | |
912 | ||
913 | /* | |
914 | * Run to completion means we are single-threaded, no | |
915 | * need for locks. | |
916 | */ | |
1da177e4 LT |
917 | list_add_tail(&(msg->link), &(smi_info->xmit_msgs)); |
918 | ||
1da177e4 LT |
919 | result = smi_event_handler(smi_info, 0); |
920 | while (result != SI_SM_IDLE) { | |
921 | udelay(SI_SHORT_TIMEOUT_USEC); | |
922 | result = smi_event_handler(smi_info, | |
923 | SI_SHORT_TIMEOUT_USEC); | |
924 | } | |
1da177e4 | 925 | return; |
1da177e4 | 926 | } |
1da177e4 | 927 | |
f60adf42 | 928 | spin_lock_irqsave(&smi_info->si_lock, flags); |
bda4c30a CM |
929 | if (priority > 0) |
930 | list_add_tail(&msg->link, &smi_info->hp_xmit_msgs); | |
931 | else | |
932 | list_add_tail(&msg->link, &smi_info->xmit_msgs); | |
bda4c30a | 933 | |
89986496 | 934 | check_start_timer_thread(smi_info); |
bda4c30a | 935 | spin_unlock_irqrestore(&smi_info->si_lock, flags); |
1da177e4 LT |
936 | } |
937 | ||
938 | static void set_run_to_completion(void *send_info, int i_run_to_completion) | |
939 | { | |
940 | struct smi_info *smi_info = send_info; | |
941 | enum si_sm_result result; | |
1da177e4 LT |
942 | |
943 | smi_info->run_to_completion = i_run_to_completion; | |
944 | if (i_run_to_completion) { | |
945 | result = smi_event_handler(smi_info, 0); | |
946 | while (result != SI_SM_IDLE) { | |
947 | udelay(SI_SHORT_TIMEOUT_USEC); | |
948 | result = smi_event_handler(smi_info, | |
949 | SI_SHORT_TIMEOUT_USEC); | |
950 | } | |
951 | } | |
1da177e4 LT |
952 | } |
953 | ||
ae74e823 MW |
954 | /* |
955 | * Use -1 in the nsec value of the busy waiting timespec to tell that | |
956 | * we are spinning in kipmid looking for something and not delaying | |
957 | * between checks | |
958 | */ | |
959 | static inline void ipmi_si_set_not_busy(struct timespec *ts) | |
960 | { | |
961 | ts->tv_nsec = -1; | |
962 | } | |
963 | static inline int ipmi_si_is_busy(struct timespec *ts) | |
964 | { | |
965 | return ts->tv_nsec != -1; | |
966 | } | |
967 | ||
968 | static int ipmi_thread_busy_wait(enum si_sm_result smi_result, | |
969 | const struct smi_info *smi_info, | |
970 | struct timespec *busy_until) | |
971 | { | |
972 | unsigned int max_busy_us = 0; | |
973 | ||
974 | if (smi_info->intf_num < num_max_busy_us) | |
975 | max_busy_us = kipmid_max_busy_us[smi_info->intf_num]; | |
976 | if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY) | |
977 | ipmi_si_set_not_busy(busy_until); | |
978 | else if (!ipmi_si_is_busy(busy_until)) { | |
979 | getnstimeofday(busy_until); | |
980 | timespec_add_ns(busy_until, max_busy_us*NSEC_PER_USEC); | |
981 | } else { | |
982 | struct timespec now; | |
983 | getnstimeofday(&now); | |
984 | if (unlikely(timespec_compare(&now, busy_until) > 0)) { | |
985 | ipmi_si_set_not_busy(busy_until); | |
986 | return 0; | |
987 | } | |
988 | } | |
989 | return 1; | |
990 | } | |
991 | ||
992 | ||
993 | /* | |
994 | * A busy-waiting loop for speeding up IPMI operation. | |
995 | * | |
996 | * Lousy hardware makes this hard. This is only enabled for systems | |
997 | * that are not BT and do not have interrupts. It starts spinning | |
998 | * when an operation is complete or until max_busy tells it to stop | |
999 | * (if that is enabled). See the paragraph on kimid_max_busy_us in | |
1000 | * Documentation/IPMI.txt for details. | |
1001 | */ | |
a9a2c44f CM |
1002 | static int ipmi_thread(void *data) |
1003 | { | |
1004 | struct smi_info *smi_info = data; | |
e9a705a0 | 1005 | unsigned long flags; |
a9a2c44f | 1006 | enum si_sm_result smi_result; |
ae74e823 | 1007 | struct timespec busy_until; |
a9a2c44f | 1008 | |
ae74e823 | 1009 | ipmi_si_set_not_busy(&busy_until); |
a9a2c44f | 1010 | set_user_nice(current, 19); |
e9a705a0 | 1011 | while (!kthread_should_stop()) { |
ae74e823 MW |
1012 | int busy_wait; |
1013 | ||
a9a2c44f | 1014 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
8a3628d5 | 1015 | smi_result = smi_event_handler(smi_info, 0); |
48e8ac29 BS |
1016 | |
1017 | /* | |
1018 | * If the driver is doing something, there is a possible | |
1019 | * race with the timer. If the timer handler see idle, | |
1020 | * and the thread here sees something else, the timer | |
1021 | * handler won't restart the timer even though it is | |
1022 | * required. So start it here if necessary. | |
1023 | */ | |
1024 | if (smi_result != SI_SM_IDLE && !smi_info->timer_running) | |
1025 | smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); | |
1026 | ||
a9a2c44f | 1027 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
ae74e823 MW |
1028 | busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, |
1029 | &busy_until); | |
c305e3d3 CM |
1030 | if (smi_result == SI_SM_CALL_WITHOUT_DELAY) |
1031 | ; /* do nothing */ | |
ae74e823 | 1032 | else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) |
33979734 | 1033 | schedule(); |
89986496 CM |
1034 | else if (smi_result == SI_SM_IDLE) { |
1035 | if (atomic_read(&smi_info->need_watch)) { | |
1036 | schedule_timeout_interruptible(100); | |
1037 | } else { | |
1038 | /* Wait to be woken up when we are needed. */ | |
1039 | __set_current_state(TASK_INTERRUPTIBLE); | |
1040 | schedule(); | |
1041 | } | |
1042 | } else | |
8d1f66dc | 1043 | schedule_timeout_interruptible(1); |
a9a2c44f | 1044 | } |
a9a2c44f CM |
1045 | return 0; |
1046 | } | |
1047 | ||
1048 | ||
1da177e4 LT |
1049 | static void poll(void *send_info) |
1050 | { | |
1051 | struct smi_info *smi_info = send_info; | |
f60adf42 CM |
1052 | unsigned long flags = 0; |
1053 | int run_to_completion = smi_info->run_to_completion; | |
1da177e4 | 1054 | |
15c62e10 CM |
1055 | /* |
1056 | * Make sure there is some delay in the poll loop so we can | |
1057 | * drive time forward and timeout things. | |
1058 | */ | |
1059 | udelay(10); | |
f60adf42 CM |
1060 | if (!run_to_completion) |
1061 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
15c62e10 | 1062 | smi_event_handler(smi_info, 10); |
f60adf42 CM |
1063 | if (!run_to_completion) |
1064 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1da177e4 LT |
1065 | } |
1066 | ||
1067 | static void request_events(void *send_info) | |
1068 | { | |
1069 | struct smi_info *smi_info = send_info; | |
1070 | ||
40112ae7 CM |
1071 | if (atomic_read(&smi_info->stop_operation) || |
1072 | !smi_info->has_event_buffer) | |
b361e27b CM |
1073 | return; |
1074 | ||
1da177e4 LT |
1075 | atomic_set(&smi_info->req_events, 1); |
1076 | } | |
1077 | ||
89986496 CM |
1078 | static void set_need_watch(void *send_info, int enable) |
1079 | { | |
1080 | struct smi_info *smi_info = send_info; | |
1081 | unsigned long flags; | |
1082 | ||
1083 | atomic_set(&smi_info->need_watch, enable); | |
1084 | spin_lock_irqsave(&smi_info->si_lock, flags); | |
1085 | check_start_timer_thread(smi_info); | |
1086 | spin_unlock_irqrestore(&smi_info->si_lock, flags); | |
1087 | } | |
1088 | ||
0c8204b3 | 1089 | static int initialized; |
1da177e4 | 1090 | |
1da177e4 LT |
1091 | static void smi_timeout(unsigned long data) |
1092 | { | |
1093 | struct smi_info *smi_info = (struct smi_info *) data; | |
1094 | enum si_sm_result smi_result; | |
1095 | unsigned long flags; | |
1096 | unsigned long jiffies_now; | |
c4edff1c | 1097 | long time_diff; |
3326f4f2 | 1098 | long timeout; |
1da177e4 LT |
1099 | #ifdef DEBUG_TIMING |
1100 | struct timeval t; | |
1101 | #endif | |
1102 | ||
1da177e4 LT |
1103 | spin_lock_irqsave(&(smi_info->si_lock), flags); |
1104 | #ifdef DEBUG_TIMING | |
1105 | do_gettimeofday(&t); | |
c305e3d3 | 1106 | printk(KERN_DEBUG "**Timer: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1107 | #endif |
1108 | jiffies_now = jiffies; | |
c4edff1c | 1109 | time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies) |
1da177e4 LT |
1110 | * SI_USEC_PER_JIFFY); |
1111 | smi_result = smi_event_handler(smi_info, time_diff); | |
1112 | ||
b0defcdb | 1113 | if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { |
1da177e4 | 1114 | /* Running with interrupts, only do long timeouts. */ |
3326f4f2 | 1115 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
64959e2d | 1116 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1117 | goto do_mod_timer; |
1da177e4 LT |
1118 | } |
1119 | ||
c305e3d3 CM |
1120 | /* |
1121 | * If the state machine asks for a short delay, then shorten | |
1122 | * the timer timeout. | |
1123 | */ | |
1da177e4 | 1124 | if (smi_result == SI_SM_CALL_WITH_DELAY) { |
64959e2d | 1125 | smi_inc_stat(smi_info, short_timeouts); |
3326f4f2 | 1126 | timeout = jiffies + 1; |
1da177e4 | 1127 | } else { |
64959e2d | 1128 | smi_inc_stat(smi_info, long_timeouts); |
3326f4f2 | 1129 | timeout = jiffies + SI_TIMEOUT_JIFFIES; |
1da177e4 LT |
1130 | } |
1131 | ||
3326f4f2 MG |
1132 | do_mod_timer: |
1133 | if (smi_result != SI_SM_IDLE) | |
48e8ac29 BS |
1134 | smi_mod_timer(smi_info, timeout); |
1135 | else | |
1136 | smi_info->timer_running = false; | |
1137 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); | |
1da177e4 LT |
1138 | } |
1139 | ||
7d12e780 | 1140 | static irqreturn_t si_irq_handler(int irq, void *data) |
1da177e4 LT |
1141 | { |
1142 | struct smi_info *smi_info = data; | |
1143 | unsigned long flags; | |
1144 | #ifdef DEBUG_TIMING | |
1145 | struct timeval t; | |
1146 | #endif | |
1147 | ||
1148 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
1149 | ||
64959e2d | 1150 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 1151 | |
1da177e4 LT |
1152 | #ifdef DEBUG_TIMING |
1153 | do_gettimeofday(&t); | |
c305e3d3 | 1154 | printk(KERN_DEBUG "**Interrupt: %d.%9.9d\n", t.tv_sec, t.tv_usec); |
1da177e4 LT |
1155 | #endif |
1156 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
1157 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
1158 | return IRQ_HANDLED; | |
1159 | } | |
1160 | ||
7d12e780 | 1161 | static irqreturn_t si_bt_irq_handler(int irq, void *data) |
9dbf68f9 CM |
1162 | { |
1163 | struct smi_info *smi_info = data; | |
1164 | /* We need to clear the IRQ flag for the BT interface. */ | |
1165 | smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, | |
1166 | IPMI_BT_INTMASK_CLEAR_IRQ_BIT | |
1167 | | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
7d12e780 | 1168 | return si_irq_handler(irq, data); |
9dbf68f9 CM |
1169 | } |
1170 | ||
453823ba CM |
1171 | static int smi_start_processing(void *send_info, |
1172 | ipmi_smi_t intf) | |
1173 | { | |
1174 | struct smi_info *new_smi = send_info; | |
a51f4a81 | 1175 | int enable = 0; |
453823ba CM |
1176 | |
1177 | new_smi->intf = intf; | |
1178 | ||
c45adc39 CM |
1179 | /* Try to claim any interrupts. */ |
1180 | if (new_smi->irq_setup) | |
1181 | new_smi->irq_setup(new_smi); | |
1182 | ||
453823ba CM |
1183 | /* Set up the timer that drives the interface. */ |
1184 | setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); | |
48e8ac29 | 1185 | smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES); |
453823ba | 1186 | |
a51f4a81 CM |
1187 | /* |
1188 | * Check if the user forcefully enabled the daemon. | |
1189 | */ | |
1190 | if (new_smi->intf_num < num_force_kipmid) | |
1191 | enable = force_kipmid[new_smi->intf_num]; | |
df3fe8de CM |
1192 | /* |
1193 | * The BT interface is efficient enough to not need a thread, | |
1194 | * and there is no need for a thread if we have interrupts. | |
1195 | */ | |
c305e3d3 | 1196 | else if ((new_smi->si_type != SI_BT) && (!new_smi->irq)) |
a51f4a81 CM |
1197 | enable = 1; |
1198 | ||
1199 | if (enable) { | |
453823ba CM |
1200 | new_smi->thread = kthread_run(ipmi_thread, new_smi, |
1201 | "kipmi%d", new_smi->intf_num); | |
1202 | if (IS_ERR(new_smi->thread)) { | |
279fbd0c MS |
1203 | dev_notice(new_smi->dev, "Could not start" |
1204 | " kernel thread due to error %ld, only using" | |
1205 | " timers to drive the interface\n", | |
1206 | PTR_ERR(new_smi->thread)); | |
453823ba CM |
1207 | new_smi->thread = NULL; |
1208 | } | |
1209 | } | |
1210 | ||
1211 | return 0; | |
1212 | } | |
9dbf68f9 | 1213 | |
16f4232c ZY |
1214 | static int get_smi_info(void *send_info, struct ipmi_smi_info *data) |
1215 | { | |
1216 | struct smi_info *smi = send_info; | |
1217 | ||
1218 | data->addr_src = smi->addr_source; | |
1219 | data->dev = smi->dev; | |
1220 | data->addr_info = smi->addr_info; | |
1221 | get_device(smi->dev); | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
b9675136 CM |
1226 | static void set_maintenance_mode(void *send_info, int enable) |
1227 | { | |
1228 | struct smi_info *smi_info = send_info; | |
1229 | ||
1230 | if (!enable) | |
1231 | atomic_set(&smi_info->req_events, 0); | |
1232 | } | |
1233 | ||
c305e3d3 | 1234 | static struct ipmi_smi_handlers handlers = { |
1da177e4 | 1235 | .owner = THIS_MODULE, |
453823ba | 1236 | .start_processing = smi_start_processing, |
16f4232c | 1237 | .get_smi_info = get_smi_info, |
1da177e4 LT |
1238 | .sender = sender, |
1239 | .request_events = request_events, | |
89986496 | 1240 | .set_need_watch = set_need_watch, |
b9675136 | 1241 | .set_maintenance_mode = set_maintenance_mode, |
1da177e4 LT |
1242 | .set_run_to_completion = set_run_to_completion, |
1243 | .poll = poll, | |
1244 | }; | |
1245 | ||
c305e3d3 CM |
1246 | /* |
1247 | * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, | |
1248 | * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. | |
1249 | */ | |
1da177e4 | 1250 | |
b0defcdb | 1251 | static LIST_HEAD(smi_infos); |
d6dfd131 | 1252 | static DEFINE_MUTEX(smi_infos_lock); |
b0defcdb | 1253 | static int smi_num; /* Used to sequence the SMIs */ |
1da177e4 | 1254 | |
1da177e4 | 1255 | #define DEFAULT_REGSPACING 1 |
dba9b4f6 | 1256 | #define DEFAULT_REGSIZE 1 |
1da177e4 | 1257 | |
d941aeae CM |
1258 | #ifdef CONFIG_ACPI |
1259 | static bool si_tryacpi = 1; | |
1260 | #endif | |
1261 | #ifdef CONFIG_DMI | |
1262 | static bool si_trydmi = 1; | |
1263 | #endif | |
f2afae46 CM |
1264 | static bool si_tryplatform = 1; |
1265 | #ifdef CONFIG_PCI | |
1266 | static bool si_trypci = 1; | |
1267 | #endif | |
0dfe6e7e | 1268 | static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS); |
1da177e4 LT |
1269 | static char *si_type[SI_MAX_PARMS]; |
1270 | #define MAX_SI_TYPE_STR 30 | |
1271 | static char si_type_str[MAX_SI_TYPE_STR]; | |
1272 | static unsigned long addrs[SI_MAX_PARMS]; | |
64a6f950 | 1273 | static unsigned int num_addrs; |
1da177e4 | 1274 | static unsigned int ports[SI_MAX_PARMS]; |
64a6f950 | 1275 | static unsigned int num_ports; |
1da177e4 | 1276 | static int irqs[SI_MAX_PARMS]; |
64a6f950 | 1277 | static unsigned int num_irqs; |
1da177e4 | 1278 | static int regspacings[SI_MAX_PARMS]; |
64a6f950 | 1279 | static unsigned int num_regspacings; |
1da177e4 | 1280 | static int regsizes[SI_MAX_PARMS]; |
64a6f950 | 1281 | static unsigned int num_regsizes; |
1da177e4 | 1282 | static int regshifts[SI_MAX_PARMS]; |
64a6f950 | 1283 | static unsigned int num_regshifts; |
2f95d513 | 1284 | static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ |
64a6f950 | 1285 | static unsigned int num_slave_addrs; |
1da177e4 | 1286 | |
b361e27b CM |
1287 | #define IPMI_IO_ADDR_SPACE 0 |
1288 | #define IPMI_MEM_ADDR_SPACE 1 | |
1d5636cc | 1289 | static char *addr_space_to_str[] = { "i/o", "mem" }; |
b361e27b CM |
1290 | |
1291 | static int hotmod_handler(const char *val, struct kernel_param *kp); | |
1292 | ||
1293 | module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200); | |
1294 | MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See" | |
1295 | " Documentation/IPMI.txt in the kernel sources for the" | |
1296 | " gory details."); | |
1da177e4 | 1297 | |
d941aeae CM |
1298 | #ifdef CONFIG_ACPI |
1299 | module_param_named(tryacpi, si_tryacpi, bool, 0); | |
1300 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1301 | " default scan of the interfaces identified via ACPI"); | |
1302 | #endif | |
1303 | #ifdef CONFIG_DMI | |
1304 | module_param_named(trydmi, si_trydmi, bool, 0); | |
1305 | MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the" | |
1306 | " default scan of the interfaces identified via DMI"); | |
1307 | #endif | |
f2afae46 CM |
1308 | module_param_named(tryplatform, si_tryplatform, bool, 0); |
1309 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1310 | " default scan of the interfaces identified via platform" | |
1311 | " interfaces like openfirmware"); | |
1312 | #ifdef CONFIG_PCI | |
1313 | module_param_named(trypci, si_trypci, bool, 0); | |
1314 | MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the" | |
1315 | " default scan of the interfaces identified via pci"); | |
1316 | #endif | |
1da177e4 LT |
1317 | module_param_named(trydefaults, si_trydefaults, bool, 0); |
1318 | MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the" | |
1319 | " default scan of the KCS and SMIC interface at the standard" | |
1320 | " address"); | |
1321 | module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); | |
1322 | MODULE_PARM_DESC(type, "Defines the type of each interface, each" | |
1323 | " interface separated by commas. The types are 'kcs'," | |
1324 | " 'smic', and 'bt'. For example si_type=kcs,bt will set" | |
1325 | " the first interface to kcs and the second to bt"); | |
64a6f950 | 1326 | module_param_array(addrs, ulong, &num_addrs, 0); |
1da177e4 LT |
1327 | MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" |
1328 | " addresses separated by commas. Only use if an interface" | |
1329 | " is in memory. Otherwise, set it to zero or leave" | |
1330 | " it blank."); | |
64a6f950 | 1331 | module_param_array(ports, uint, &num_ports, 0); |
1da177e4 LT |
1332 | MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" |
1333 | " addresses separated by commas. Only use if an interface" | |
1334 | " is a port. Otherwise, set it to zero or leave" | |
1335 | " it blank."); | |
1336 | module_param_array(irqs, int, &num_irqs, 0); | |
1337 | MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" | |
1338 | " addresses separated by commas. Only use if an interface" | |
1339 | " has an interrupt. Otherwise, set it to zero or leave" | |
1340 | " it blank."); | |
1341 | module_param_array(regspacings, int, &num_regspacings, 0); | |
1342 | MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" | |
1343 | " and each successive register used by the interface. For" | |
1344 | " instance, if the start address is 0xca2 and the spacing" | |
1345 | " is 2, then the second address is at 0xca4. Defaults" | |
1346 | " to 1."); | |
1347 | module_param_array(regsizes, int, &num_regsizes, 0); | |
1348 | MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." | |
1349 | " This should generally be 1, 2, 4, or 8 for an 8-bit," | |
1350 | " 16-bit, 32-bit, or 64-bit register. Use this if you" | |
1351 | " the 8-bit IPMI register has to be read from a larger" | |
1352 | " register."); | |
1353 | module_param_array(regshifts, int, &num_regshifts, 0); | |
1354 | MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." | |
1355 | " IPMI register, in bits. For instance, if the data" | |
1356 | " is read from a 32-bit word and the IPMI data is in" | |
1357 | " bit 8-15, then the shift would be 8"); | |
1358 | module_param_array(slave_addrs, int, &num_slave_addrs, 0); | |
1359 | MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" | |
1360 | " the controller. Normally this is 0x20, but can be" | |
1361 | " overridden by this parm. This is an array indexed" | |
1362 | " by interface number."); | |
a51f4a81 CM |
1363 | module_param_array(force_kipmid, int, &num_force_kipmid, 0); |
1364 | MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" | |
1365 | " disabled(0). Normally the IPMI driver auto-detects" | |
1366 | " this, but the value may be overridden by this parm."); | |
b361e27b CM |
1367 | module_param(unload_when_empty, int, 0); |
1368 | MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" | |
1369 | " specified or found, default is 1. Setting to 0" | |
1370 | " is useful for hot add of devices using hotmod."); | |
ae74e823 MW |
1371 | module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644); |
1372 | MODULE_PARM_DESC(kipmid_max_busy_us, | |
1373 | "Max time (in microseconds) to busy-wait for IPMI data before" | |
1374 | " sleeping. 0 (default) means to wait forever. Set to 100-500" | |
1375 | " if kipmid is using up a lot of CPU time."); | |
1da177e4 LT |
1376 | |
1377 | ||
b0defcdb | 1378 | static void std_irq_cleanup(struct smi_info *info) |
1da177e4 | 1379 | { |
b0defcdb CM |
1380 | if (info->si_type == SI_BT) |
1381 | /* Disable the interrupt in the BT interface. */ | |
1382 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0); | |
1383 | free_irq(info->irq, info); | |
1da177e4 | 1384 | } |
1da177e4 LT |
1385 | |
1386 | static int std_irq_setup(struct smi_info *info) | |
1387 | { | |
1388 | int rv; | |
1389 | ||
b0defcdb | 1390 | if (!info->irq) |
1da177e4 LT |
1391 | return 0; |
1392 | ||
9dbf68f9 CM |
1393 | if (info->si_type == SI_BT) { |
1394 | rv = request_irq(info->irq, | |
1395 | si_bt_irq_handler, | |
aa5b2bab | 1396 | IRQF_SHARED, |
9dbf68f9 CM |
1397 | DEVICE_NAME, |
1398 | info); | |
b0defcdb | 1399 | if (!rv) |
9dbf68f9 CM |
1400 | /* Enable the interrupt in the BT interface. */ |
1401 | info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, | |
1402 | IPMI_BT_INTMASK_ENABLE_IRQ_BIT); | |
1403 | } else | |
1404 | rv = request_irq(info->irq, | |
1405 | si_irq_handler, | |
aa5b2bab | 1406 | IRQF_SHARED, |
9dbf68f9 CM |
1407 | DEVICE_NAME, |
1408 | info); | |
1da177e4 | 1409 | if (rv) { |
279fbd0c MS |
1410 | dev_warn(info->dev, "%s unable to claim interrupt %d," |
1411 | " running polled\n", | |
1412 | DEVICE_NAME, info->irq); | |
1da177e4 LT |
1413 | info->irq = 0; |
1414 | } else { | |
b0defcdb | 1415 | info->irq_cleanup = std_irq_cleanup; |
279fbd0c | 1416 | dev_info(info->dev, "Using irq %d\n", info->irq); |
1da177e4 LT |
1417 | } |
1418 | ||
1419 | return rv; | |
1420 | } | |
1421 | ||
1da177e4 LT |
1422 | static unsigned char port_inb(struct si_sm_io *io, unsigned int offset) |
1423 | { | |
b0defcdb | 1424 | unsigned int addr = io->addr_data; |
1da177e4 | 1425 | |
b0defcdb | 1426 | return inb(addr + (offset * io->regspacing)); |
1da177e4 LT |
1427 | } |
1428 | ||
1429 | static void port_outb(struct si_sm_io *io, unsigned int offset, | |
1430 | unsigned char b) | |
1431 | { | |
b0defcdb | 1432 | unsigned int addr = io->addr_data; |
1da177e4 | 1433 | |
b0defcdb | 1434 | outb(b, addr + (offset * io->regspacing)); |
1da177e4 LT |
1435 | } |
1436 | ||
1437 | static unsigned char port_inw(struct si_sm_io *io, unsigned int offset) | |
1438 | { | |
b0defcdb | 1439 | unsigned int addr = io->addr_data; |
1da177e4 | 1440 | |
b0defcdb | 1441 | return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1442 | } |
1443 | ||
1444 | static void port_outw(struct si_sm_io *io, unsigned int offset, | |
1445 | unsigned char b) | |
1446 | { | |
b0defcdb | 1447 | unsigned int addr = io->addr_data; |
1da177e4 | 1448 | |
b0defcdb | 1449 | outw(b << io->regshift, addr + (offset * io->regspacing)); |
1da177e4 LT |
1450 | } |
1451 | ||
1452 | static unsigned char port_inl(struct si_sm_io *io, unsigned int offset) | |
1453 | { | |
b0defcdb | 1454 | unsigned int addr = io->addr_data; |
1da177e4 | 1455 | |
b0defcdb | 1456 | return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff; |
1da177e4 LT |
1457 | } |
1458 | ||
1459 | static void port_outl(struct si_sm_io *io, unsigned int offset, | |
1460 | unsigned char b) | |
1461 | { | |
b0defcdb | 1462 | unsigned int addr = io->addr_data; |
1da177e4 | 1463 | |
b0defcdb | 1464 | outl(b << io->regshift, addr+(offset * io->regspacing)); |
1da177e4 LT |
1465 | } |
1466 | ||
1467 | static void port_cleanup(struct smi_info *info) | |
1468 | { | |
b0defcdb | 1469 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1470 | int idx; |
1da177e4 | 1471 | |
b0defcdb | 1472 | if (addr) { |
c305e3d3 | 1473 | for (idx = 0; idx < info->io_size; idx++) |
d61a3ead CM |
1474 | release_region(addr + idx * info->io.regspacing, |
1475 | info->io.regsize); | |
1da177e4 | 1476 | } |
1da177e4 LT |
1477 | } |
1478 | ||
1479 | static int port_setup(struct smi_info *info) | |
1480 | { | |
b0defcdb | 1481 | unsigned int addr = info->io.addr_data; |
d61a3ead | 1482 | int idx; |
1da177e4 | 1483 | |
b0defcdb | 1484 | if (!addr) |
1da177e4 LT |
1485 | return -ENODEV; |
1486 | ||
1487 | info->io_cleanup = port_cleanup; | |
1488 | ||
c305e3d3 CM |
1489 | /* |
1490 | * Figure out the actual inb/inw/inl/etc routine to use based | |
1491 | * upon the register size. | |
1492 | */ | |
1da177e4 LT |
1493 | switch (info->io.regsize) { |
1494 | case 1: | |
1495 | info->io.inputb = port_inb; | |
1496 | info->io.outputb = port_outb; | |
1497 | break; | |
1498 | case 2: | |
1499 | info->io.inputb = port_inw; | |
1500 | info->io.outputb = port_outw; | |
1501 | break; | |
1502 | case 4: | |
1503 | info->io.inputb = port_inl; | |
1504 | info->io.outputb = port_outl; | |
1505 | break; | |
1506 | default: | |
279fbd0c MS |
1507 | dev_warn(info->dev, "Invalid register size: %d\n", |
1508 | info->io.regsize); | |
1da177e4 LT |
1509 | return -EINVAL; |
1510 | } | |
1511 | ||
c305e3d3 CM |
1512 | /* |
1513 | * Some BIOSes reserve disjoint I/O regions in their ACPI | |
d61a3ead CM |
1514 | * tables. This causes problems when trying to register the |
1515 | * entire I/O region. Therefore we must register each I/O | |
1516 | * port separately. | |
1517 | */ | |
c305e3d3 | 1518 | for (idx = 0; idx < info->io_size; idx++) { |
d61a3ead CM |
1519 | if (request_region(addr + idx * info->io.regspacing, |
1520 | info->io.regsize, DEVICE_NAME) == NULL) { | |
1521 | /* Undo allocations */ | |
1522 | while (idx--) { | |
1523 | release_region(addr + idx * info->io.regspacing, | |
1524 | info->io.regsize); | |
1525 | } | |
1526 | return -EIO; | |
1527 | } | |
1528 | } | |
1da177e4 LT |
1529 | return 0; |
1530 | } | |
1531 | ||
546cfdf4 | 1532 | static unsigned char intf_mem_inb(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1533 | { |
1534 | return readb((io->addr)+(offset * io->regspacing)); | |
1535 | } | |
1536 | ||
546cfdf4 | 1537 | static void intf_mem_outb(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1538 | unsigned char b) |
1539 | { | |
1540 | writeb(b, (io->addr)+(offset * io->regspacing)); | |
1541 | } | |
1542 | ||
546cfdf4 | 1543 | static unsigned char intf_mem_inw(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1544 | { |
1545 | return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1546 | & 0xff; |
1da177e4 LT |
1547 | } |
1548 | ||
546cfdf4 | 1549 | static void intf_mem_outw(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1550 | unsigned char b) |
1551 | { | |
1552 | writeb(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1553 | } | |
1554 | ||
546cfdf4 | 1555 | static unsigned char intf_mem_inl(struct si_sm_io *io, unsigned int offset) |
1da177e4 LT |
1556 | { |
1557 | return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1558 | & 0xff; |
1da177e4 LT |
1559 | } |
1560 | ||
546cfdf4 | 1561 | static void intf_mem_outl(struct si_sm_io *io, unsigned int offset, |
1da177e4 LT |
1562 | unsigned char b) |
1563 | { | |
1564 | writel(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1565 | } | |
1566 | ||
1567 | #ifdef readq | |
1568 | static unsigned char mem_inq(struct si_sm_io *io, unsigned int offset) | |
1569 | { | |
1570 | return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift) | |
64d9fe69 | 1571 | & 0xff; |
1da177e4 LT |
1572 | } |
1573 | ||
1574 | static void mem_outq(struct si_sm_io *io, unsigned int offset, | |
1575 | unsigned char b) | |
1576 | { | |
1577 | writeq(b << io->regshift, (io->addr)+(offset * io->regspacing)); | |
1578 | } | |
1579 | #endif | |
1580 | ||
1581 | static void mem_cleanup(struct smi_info *info) | |
1582 | { | |
b0defcdb | 1583 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1584 | int mapsize; |
1585 | ||
1586 | if (info->io.addr) { | |
1587 | iounmap(info->io.addr); | |
1588 | ||
1589 | mapsize = ((info->io_size * info->io.regspacing) | |
1590 | - (info->io.regspacing - info->io.regsize)); | |
1591 | ||
b0defcdb | 1592 | release_mem_region(addr, mapsize); |
1da177e4 | 1593 | } |
1da177e4 LT |
1594 | } |
1595 | ||
1596 | static int mem_setup(struct smi_info *info) | |
1597 | { | |
b0defcdb | 1598 | unsigned long addr = info->io.addr_data; |
1da177e4 LT |
1599 | int mapsize; |
1600 | ||
b0defcdb | 1601 | if (!addr) |
1da177e4 LT |
1602 | return -ENODEV; |
1603 | ||
1604 | info->io_cleanup = mem_cleanup; | |
1605 | ||
c305e3d3 CM |
1606 | /* |
1607 | * Figure out the actual readb/readw/readl/etc routine to use based | |
1608 | * upon the register size. | |
1609 | */ | |
1da177e4 LT |
1610 | switch (info->io.regsize) { |
1611 | case 1: | |
546cfdf4 AD |
1612 | info->io.inputb = intf_mem_inb; |
1613 | info->io.outputb = intf_mem_outb; | |
1da177e4 LT |
1614 | break; |
1615 | case 2: | |
546cfdf4 AD |
1616 | info->io.inputb = intf_mem_inw; |
1617 | info->io.outputb = intf_mem_outw; | |
1da177e4 LT |
1618 | break; |
1619 | case 4: | |
546cfdf4 AD |
1620 | info->io.inputb = intf_mem_inl; |
1621 | info->io.outputb = intf_mem_outl; | |
1da177e4 LT |
1622 | break; |
1623 | #ifdef readq | |
1624 | case 8: | |
1625 | info->io.inputb = mem_inq; | |
1626 | info->io.outputb = mem_outq; | |
1627 | break; | |
1628 | #endif | |
1629 | default: | |
279fbd0c MS |
1630 | dev_warn(info->dev, "Invalid register size: %d\n", |
1631 | info->io.regsize); | |
1da177e4 LT |
1632 | return -EINVAL; |
1633 | } | |
1634 | ||
c305e3d3 CM |
1635 | /* |
1636 | * Calculate the total amount of memory to claim. This is an | |
1da177e4 LT |
1637 | * unusual looking calculation, but it avoids claiming any |
1638 | * more memory than it has to. It will claim everything | |
1639 | * between the first address to the end of the last full | |
c305e3d3 CM |
1640 | * register. |
1641 | */ | |
1da177e4 LT |
1642 | mapsize = ((info->io_size * info->io.regspacing) |
1643 | - (info->io.regspacing - info->io.regsize)); | |
1644 | ||
b0defcdb | 1645 | if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL) |
1da177e4 LT |
1646 | return -EIO; |
1647 | ||
b0defcdb | 1648 | info->io.addr = ioremap(addr, mapsize); |
1da177e4 | 1649 | if (info->io.addr == NULL) { |
b0defcdb | 1650 | release_mem_region(addr, mapsize); |
1da177e4 LT |
1651 | return -EIO; |
1652 | } | |
1653 | return 0; | |
1654 | } | |
1655 | ||
b361e27b CM |
1656 | /* |
1657 | * Parms come in as <op1>[:op2[:op3...]]. ops are: | |
1658 | * add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] | |
1659 | * Options are: | |
1660 | * rsp=<regspacing> | |
1661 | * rsi=<regsize> | |
1662 | * rsh=<regshift> | |
1663 | * irq=<irq> | |
1664 | * ipmb=<ipmb addr> | |
1665 | */ | |
1666 | enum hotmod_op { HM_ADD, HM_REMOVE }; | |
1667 | struct hotmod_vals { | |
1668 | char *name; | |
1669 | int val; | |
1670 | }; | |
1671 | static struct hotmod_vals hotmod_ops[] = { | |
1672 | { "add", HM_ADD }, | |
1673 | { "remove", HM_REMOVE }, | |
1674 | { NULL } | |
1675 | }; | |
1676 | static struct hotmod_vals hotmod_si[] = { | |
1677 | { "kcs", SI_KCS }, | |
1678 | { "smic", SI_SMIC }, | |
1679 | { "bt", SI_BT }, | |
1680 | { NULL } | |
1681 | }; | |
1682 | static struct hotmod_vals hotmod_as[] = { | |
1683 | { "mem", IPMI_MEM_ADDR_SPACE }, | |
1684 | { "i/o", IPMI_IO_ADDR_SPACE }, | |
1685 | { NULL } | |
1686 | }; | |
1d5636cc | 1687 | |
b361e27b CM |
1688 | static int parse_str(struct hotmod_vals *v, int *val, char *name, char **curr) |
1689 | { | |
1690 | char *s; | |
1691 | int i; | |
1692 | ||
1693 | s = strchr(*curr, ','); | |
1694 | if (!s) { | |
1695 | printk(KERN_WARNING PFX "No hotmod %s given.\n", name); | |
1696 | return -EINVAL; | |
1697 | } | |
1698 | *s = '\0'; | |
1699 | s++; | |
1700 | for (i = 0; hotmod_ops[i].name; i++) { | |
1d5636cc | 1701 | if (strcmp(*curr, v[i].name) == 0) { |
b361e27b CM |
1702 | *val = v[i].val; |
1703 | *curr = s; | |
1704 | return 0; | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr); | |
1709 | return -EINVAL; | |
1710 | } | |
1711 | ||
1d5636cc CM |
1712 | static int check_hotmod_int_op(const char *curr, const char *option, |
1713 | const char *name, int *val) | |
1714 | { | |
1715 | char *n; | |
1716 | ||
1717 | if (strcmp(curr, name) == 0) { | |
1718 | if (!option) { | |
1719 | printk(KERN_WARNING PFX | |
1720 | "No option given for '%s'\n", | |
1721 | curr); | |
1722 | return -EINVAL; | |
1723 | } | |
1724 | *val = simple_strtoul(option, &n, 0); | |
1725 | if ((*n != '\0') || (*option == '\0')) { | |
1726 | printk(KERN_WARNING PFX | |
1727 | "Bad option given for '%s'\n", | |
1728 | curr); | |
1729 | return -EINVAL; | |
1730 | } | |
1731 | return 1; | |
1732 | } | |
1733 | return 0; | |
1734 | } | |
1735 | ||
de5e2ddf ED |
1736 | static struct smi_info *smi_info_alloc(void) |
1737 | { | |
1738 | struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL); | |
1739 | ||
f60adf42 | 1740 | if (info) |
de5e2ddf | 1741 | spin_lock_init(&info->si_lock); |
de5e2ddf ED |
1742 | return info; |
1743 | } | |
1744 | ||
b361e27b CM |
1745 | static int hotmod_handler(const char *val, struct kernel_param *kp) |
1746 | { | |
1747 | char *str = kstrdup(val, GFP_KERNEL); | |
1d5636cc | 1748 | int rv; |
b361e27b CM |
1749 | char *next, *curr, *s, *n, *o; |
1750 | enum hotmod_op op; | |
1751 | enum si_type si_type; | |
1752 | int addr_space; | |
1753 | unsigned long addr; | |
1754 | int regspacing; | |
1755 | int regsize; | |
1756 | int regshift; | |
1757 | int irq; | |
1758 | int ipmb; | |
1759 | int ival; | |
1d5636cc | 1760 | int len; |
b361e27b CM |
1761 | struct smi_info *info; |
1762 | ||
1763 | if (!str) | |
1764 | return -ENOMEM; | |
1765 | ||
1766 | /* Kill any trailing spaces, as we can get a "\n" from echo. */ | |
1d5636cc CM |
1767 | len = strlen(str); |
1768 | ival = len - 1; | |
b361e27b CM |
1769 | while ((ival >= 0) && isspace(str[ival])) { |
1770 | str[ival] = '\0'; | |
1771 | ival--; | |
1772 | } | |
1773 | ||
1774 | for (curr = str; curr; curr = next) { | |
1775 | regspacing = 1; | |
1776 | regsize = 1; | |
1777 | regshift = 0; | |
1778 | irq = 0; | |
2f95d513 | 1779 | ipmb = 0; /* Choose the default if not specified */ |
b361e27b CM |
1780 | |
1781 | next = strchr(curr, ':'); | |
1782 | if (next) { | |
1783 | *next = '\0'; | |
1784 | next++; | |
1785 | } | |
1786 | ||
1787 | rv = parse_str(hotmod_ops, &ival, "operation", &curr); | |
1788 | if (rv) | |
1789 | break; | |
1790 | op = ival; | |
1791 | ||
1792 | rv = parse_str(hotmod_si, &ival, "interface type", &curr); | |
1793 | if (rv) | |
1794 | break; | |
1795 | si_type = ival; | |
1796 | ||
1797 | rv = parse_str(hotmod_as, &addr_space, "address space", &curr); | |
1798 | if (rv) | |
1799 | break; | |
1800 | ||
1801 | s = strchr(curr, ','); | |
1802 | if (s) { | |
1803 | *s = '\0'; | |
1804 | s++; | |
1805 | } | |
1806 | addr = simple_strtoul(curr, &n, 0); | |
1807 | if ((*n != '\0') || (*curr == '\0')) { | |
1808 | printk(KERN_WARNING PFX "Invalid hotmod address" | |
1809 | " '%s'\n", curr); | |
1810 | break; | |
1811 | } | |
1812 | ||
1813 | while (s) { | |
1814 | curr = s; | |
1815 | s = strchr(curr, ','); | |
1816 | if (s) { | |
1817 | *s = '\0'; | |
1818 | s++; | |
1819 | } | |
1820 | o = strchr(curr, '='); | |
1821 | if (o) { | |
1822 | *o = '\0'; | |
1823 | o++; | |
1824 | } | |
1d5636cc CM |
1825 | rv = check_hotmod_int_op(curr, o, "rsp", ®spacing); |
1826 | if (rv < 0) | |
b361e27b | 1827 | goto out; |
1d5636cc CM |
1828 | else if (rv) |
1829 | continue; | |
1830 | rv = check_hotmod_int_op(curr, o, "rsi", ®size); | |
1831 | if (rv < 0) | |
1832 | goto out; | |
1833 | else if (rv) | |
1834 | continue; | |
1835 | rv = check_hotmod_int_op(curr, o, "rsh", ®shift); | |
1836 | if (rv < 0) | |
1837 | goto out; | |
1838 | else if (rv) | |
1839 | continue; | |
1840 | rv = check_hotmod_int_op(curr, o, "irq", &irq); | |
1841 | if (rv < 0) | |
1842 | goto out; | |
1843 | else if (rv) | |
1844 | continue; | |
1845 | rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb); | |
1846 | if (rv < 0) | |
1847 | goto out; | |
1848 | else if (rv) | |
1849 | continue; | |
1850 | ||
1851 | rv = -EINVAL; | |
1852 | printk(KERN_WARNING PFX | |
1853 | "Invalid hotmod option '%s'\n", | |
1854 | curr); | |
1855 | goto out; | |
b361e27b CM |
1856 | } |
1857 | ||
1858 | if (op == HM_ADD) { | |
de5e2ddf | 1859 | info = smi_info_alloc(); |
b361e27b CM |
1860 | if (!info) { |
1861 | rv = -ENOMEM; | |
1862 | goto out; | |
1863 | } | |
1864 | ||
5fedc4a2 | 1865 | info->addr_source = SI_HOTMOD; |
b361e27b CM |
1866 | info->si_type = si_type; |
1867 | info->io.addr_data = addr; | |
1868 | info->io.addr_type = addr_space; | |
1869 | if (addr_space == IPMI_MEM_ADDR_SPACE) | |
1870 | info->io_setup = mem_setup; | |
1871 | else | |
1872 | info->io_setup = port_setup; | |
1873 | ||
1874 | info->io.addr = NULL; | |
1875 | info->io.regspacing = regspacing; | |
1876 | if (!info->io.regspacing) | |
1877 | info->io.regspacing = DEFAULT_REGSPACING; | |
1878 | info->io.regsize = regsize; | |
1879 | if (!info->io.regsize) | |
1880 | info->io.regsize = DEFAULT_REGSPACING; | |
1881 | info->io.regshift = regshift; | |
1882 | info->irq = irq; | |
1883 | if (info->irq) | |
1884 | info->irq_setup = std_irq_setup; | |
1885 | info->slave_addr = ipmb; | |
1886 | ||
d02b3709 CM |
1887 | rv = add_smi(info); |
1888 | if (rv) { | |
7faefea6 | 1889 | kfree(info); |
d02b3709 CM |
1890 | goto out; |
1891 | } | |
1892 | rv = try_smi_init(info); | |
1893 | if (rv) { | |
1894 | cleanup_one_si(info); | |
1895 | goto out; | |
7faefea6 | 1896 | } |
b361e27b CM |
1897 | } else { |
1898 | /* remove */ | |
1899 | struct smi_info *e, *tmp_e; | |
1900 | ||
1901 | mutex_lock(&smi_infos_lock); | |
1902 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) { | |
1903 | if (e->io.addr_type != addr_space) | |
1904 | continue; | |
1905 | if (e->si_type != si_type) | |
1906 | continue; | |
1907 | if (e->io.addr_data == addr) | |
1908 | cleanup_one_si(e); | |
1909 | } | |
1910 | mutex_unlock(&smi_infos_lock); | |
1911 | } | |
1912 | } | |
1d5636cc | 1913 | rv = len; |
b361e27b CM |
1914 | out: |
1915 | kfree(str); | |
1916 | return rv; | |
1917 | } | |
b0defcdb | 1918 | |
2223cbec | 1919 | static int hardcode_find_bmc(void) |
1da177e4 | 1920 | { |
a1e9c9dd | 1921 | int ret = -ENODEV; |
b0defcdb | 1922 | int i; |
1da177e4 LT |
1923 | struct smi_info *info; |
1924 | ||
b0defcdb CM |
1925 | for (i = 0; i < SI_MAX_PARMS; i++) { |
1926 | if (!ports[i] && !addrs[i]) | |
1927 | continue; | |
1da177e4 | 1928 | |
de5e2ddf | 1929 | info = smi_info_alloc(); |
b0defcdb | 1930 | if (!info) |
a1e9c9dd | 1931 | return -ENOMEM; |
1da177e4 | 1932 | |
5fedc4a2 | 1933 | info->addr_source = SI_HARDCODED; |
279fbd0c | 1934 | printk(KERN_INFO PFX "probing via hardcoded address\n"); |
1da177e4 | 1935 | |
1d5636cc | 1936 | if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { |
b0defcdb | 1937 | info->si_type = SI_KCS; |
1d5636cc | 1938 | } else if (strcmp(si_type[i], "smic") == 0) { |
b0defcdb | 1939 | info->si_type = SI_SMIC; |
1d5636cc | 1940 | } else if (strcmp(si_type[i], "bt") == 0) { |
b0defcdb CM |
1941 | info->si_type = SI_BT; |
1942 | } else { | |
279fbd0c | 1943 | printk(KERN_WARNING PFX "Interface type specified " |
b0defcdb CM |
1944 | "for interface %d, was invalid: %s\n", |
1945 | i, si_type[i]); | |
1946 | kfree(info); | |
1947 | continue; | |
1948 | } | |
1da177e4 | 1949 | |
b0defcdb CM |
1950 | if (ports[i]) { |
1951 | /* An I/O port */ | |
1952 | info->io_setup = port_setup; | |
1953 | info->io.addr_data = ports[i]; | |
1954 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
1955 | } else if (addrs[i]) { | |
1956 | /* A memory port */ | |
1957 | info->io_setup = mem_setup; | |
1958 | info->io.addr_data = addrs[i]; | |
1959 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1960 | } else { | |
279fbd0c MS |
1961 | printk(KERN_WARNING PFX "Interface type specified " |
1962 | "for interface %d, but port and address were " | |
1963 | "not set or set to zero.\n", i); | |
b0defcdb CM |
1964 | kfree(info); |
1965 | continue; | |
1966 | } | |
1da177e4 | 1967 | |
b0defcdb CM |
1968 | info->io.addr = NULL; |
1969 | info->io.regspacing = regspacings[i]; | |
1970 | if (!info->io.regspacing) | |
1971 | info->io.regspacing = DEFAULT_REGSPACING; | |
1972 | info->io.regsize = regsizes[i]; | |
1973 | if (!info->io.regsize) | |
1974 | info->io.regsize = DEFAULT_REGSPACING; | |
1975 | info->io.regshift = regshifts[i]; | |
1976 | info->irq = irqs[i]; | |
1977 | if (info->irq) | |
1978 | info->irq_setup = std_irq_setup; | |
2f95d513 | 1979 | info->slave_addr = slave_addrs[i]; |
1da177e4 | 1980 | |
7faefea6 | 1981 | if (!add_smi(info)) { |
2407d77a MG |
1982 | if (try_smi_init(info)) |
1983 | cleanup_one_si(info); | |
a1e9c9dd | 1984 | ret = 0; |
7faefea6 YL |
1985 | } else { |
1986 | kfree(info); | |
1987 | } | |
b0defcdb | 1988 | } |
a1e9c9dd | 1989 | return ret; |
b0defcdb | 1990 | } |
1da177e4 | 1991 | |
8466361a | 1992 | #ifdef CONFIG_ACPI |
1da177e4 LT |
1993 | |
1994 | #include <linux/acpi.h> | |
1995 | ||
c305e3d3 CM |
1996 | /* |
1997 | * Once we get an ACPI failure, we don't try any more, because we go | |
1998 | * through the tables sequentially. Once we don't find a table, there | |
1999 | * are no more. | |
2000 | */ | |
0c8204b3 | 2001 | static int acpi_failure; |
1da177e4 LT |
2002 | |
2003 | /* For GPE-type interrupts. */ | |
8b6cd8ad LM |
2004 | static u32 ipmi_acpi_gpe(acpi_handle gpe_device, |
2005 | u32 gpe_number, void *context) | |
1da177e4 LT |
2006 | { |
2007 | struct smi_info *smi_info = context; | |
2008 | unsigned long flags; | |
2009 | #ifdef DEBUG_TIMING | |
2010 | struct timeval t; | |
2011 | #endif | |
2012 | ||
2013 | spin_lock_irqsave(&(smi_info->si_lock), flags); | |
2014 | ||
64959e2d | 2015 | smi_inc_stat(smi_info, interrupts); |
1da177e4 | 2016 | |
1da177e4 LT |
2017 | #ifdef DEBUG_TIMING |
2018 | do_gettimeofday(&t); | |
2019 | printk("**ACPI_GPE: %d.%9.9d\n", t.tv_sec, t.tv_usec); | |
2020 | #endif | |
2021 | smi_event_handler(smi_info, 0); | |
1da177e4 LT |
2022 | spin_unlock_irqrestore(&(smi_info->si_lock), flags); |
2023 | ||
2024 | return ACPI_INTERRUPT_HANDLED; | |
2025 | } | |
2026 | ||
b0defcdb CM |
2027 | static void acpi_gpe_irq_cleanup(struct smi_info *info) |
2028 | { | |
2029 | if (!info->irq) | |
2030 | return; | |
2031 | ||
2032 | acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe); | |
2033 | } | |
2034 | ||
1da177e4 LT |
2035 | static int acpi_gpe_irq_setup(struct smi_info *info) |
2036 | { | |
2037 | acpi_status status; | |
2038 | ||
b0defcdb | 2039 | if (!info->irq) |
1da177e4 LT |
2040 | return 0; |
2041 | ||
2042 | /* FIXME - is level triggered right? */ | |
2043 | status = acpi_install_gpe_handler(NULL, | |
2044 | info->irq, | |
2045 | ACPI_GPE_LEVEL_TRIGGERED, | |
2046 | &ipmi_acpi_gpe, | |
2047 | info); | |
2048 | if (status != AE_OK) { | |
279fbd0c MS |
2049 | dev_warn(info->dev, "%s unable to claim ACPI GPE %d," |
2050 | " running polled\n", DEVICE_NAME, info->irq); | |
1da177e4 LT |
2051 | info->irq = 0; |
2052 | return -EINVAL; | |
2053 | } else { | |
b0defcdb | 2054 | info->irq_cleanup = acpi_gpe_irq_cleanup; |
279fbd0c | 2055 | dev_info(info->dev, "Using ACPI GPE %d\n", info->irq); |
1da177e4 LT |
2056 | return 0; |
2057 | } | |
2058 | } | |
2059 | ||
1da177e4 LT |
2060 | /* |
2061 | * Defined at | |
631dd1a8 | 2062 | * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf |
1da177e4 LT |
2063 | */ |
2064 | struct SPMITable { | |
2065 | s8 Signature[4]; | |
2066 | u32 Length; | |
2067 | u8 Revision; | |
2068 | u8 Checksum; | |
2069 | s8 OEMID[6]; | |
2070 | s8 OEMTableID[8]; | |
2071 | s8 OEMRevision[4]; | |
2072 | s8 CreatorID[4]; | |
2073 | s8 CreatorRevision[4]; | |
2074 | u8 InterfaceType; | |
2075 | u8 IPMIlegacy; | |
2076 | s16 SpecificationRevision; | |
2077 | ||
2078 | /* | |
2079 | * Bit 0 - SCI interrupt supported | |
2080 | * Bit 1 - I/O APIC/SAPIC | |
2081 | */ | |
2082 | u8 InterruptType; | |
2083 | ||
c305e3d3 CM |
2084 | /* |
2085 | * If bit 0 of InterruptType is set, then this is the SCI | |
2086 | * interrupt in the GPEx_STS register. | |
2087 | */ | |
1da177e4 LT |
2088 | u8 GPE; |
2089 | ||
2090 | s16 Reserved; | |
2091 | ||
c305e3d3 CM |
2092 | /* |
2093 | * If bit 1 of InterruptType is set, then this is the I/O | |
2094 | * APIC/SAPIC interrupt. | |
2095 | */ | |
1da177e4 LT |
2096 | u32 GlobalSystemInterrupt; |
2097 | ||
2098 | /* The actual register address. */ | |
2099 | struct acpi_generic_address addr; | |
2100 | ||
2101 | u8 UID[4]; | |
2102 | ||
2103 | s8 spmi_id[1]; /* A '\0' terminated array starts here. */ | |
2104 | }; | |
2105 | ||
2223cbec | 2106 | static int try_init_spmi(struct SPMITable *spmi) |
1da177e4 LT |
2107 | { |
2108 | struct smi_info *info; | |
d02b3709 | 2109 | int rv; |
1da177e4 | 2110 | |
1da177e4 | 2111 | if (spmi->IPMIlegacy != 1) { |
279fbd0c MS |
2112 | printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy); |
2113 | return -ENODEV; | |
1da177e4 LT |
2114 | } |
2115 | ||
de5e2ddf | 2116 | info = smi_info_alloc(); |
b0defcdb | 2117 | if (!info) { |
279fbd0c | 2118 | printk(KERN_ERR PFX "Could not allocate SI data (3)\n"); |
b0defcdb CM |
2119 | return -ENOMEM; |
2120 | } | |
2121 | ||
5fedc4a2 | 2122 | info->addr_source = SI_SPMI; |
279fbd0c | 2123 | printk(KERN_INFO PFX "probing via SPMI\n"); |
1da177e4 | 2124 | |
1da177e4 | 2125 | /* Figure out the interface type. */ |
c305e3d3 | 2126 | switch (spmi->InterfaceType) { |
1da177e4 | 2127 | case 1: /* KCS */ |
b0defcdb | 2128 | info->si_type = SI_KCS; |
1da177e4 | 2129 | break; |
1da177e4 | 2130 | case 2: /* SMIC */ |
b0defcdb | 2131 | info->si_type = SI_SMIC; |
1da177e4 | 2132 | break; |
1da177e4 | 2133 | case 3: /* BT */ |
b0defcdb | 2134 | info->si_type = SI_BT; |
1da177e4 | 2135 | break; |
1da177e4 | 2136 | default: |
279fbd0c MS |
2137 | printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n", |
2138 | spmi->InterfaceType); | |
b0defcdb | 2139 | kfree(info); |
1da177e4 LT |
2140 | return -EIO; |
2141 | } | |
2142 | ||
1da177e4 LT |
2143 | if (spmi->InterruptType & 1) { |
2144 | /* We've got a GPE interrupt. */ | |
2145 | info->irq = spmi->GPE; | |
2146 | info->irq_setup = acpi_gpe_irq_setup; | |
1da177e4 LT |
2147 | } else if (spmi->InterruptType & 2) { |
2148 | /* We've got an APIC/SAPIC interrupt. */ | |
2149 | info->irq = spmi->GlobalSystemInterrupt; | |
2150 | info->irq_setup = std_irq_setup; | |
1da177e4 LT |
2151 | } else { |
2152 | /* Use the default interrupt setting. */ | |
2153 | info->irq = 0; | |
2154 | info->irq_setup = NULL; | |
2155 | } | |
2156 | ||
15a58ed1 | 2157 | if (spmi->addr.bit_width) { |
35bc37a0 | 2158 | /* A (hopefully) properly formed register bit width. */ |
15a58ed1 | 2159 | info->io.regspacing = spmi->addr.bit_width / 8; |
35bc37a0 | 2160 | } else { |
35bc37a0 CM |
2161 | info->io.regspacing = DEFAULT_REGSPACING; |
2162 | } | |
b0defcdb | 2163 | info->io.regsize = info->io.regspacing; |
15a58ed1 | 2164 | info->io.regshift = spmi->addr.bit_offset; |
1da177e4 | 2165 | |
15a58ed1 | 2166 | if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { |
1da177e4 | 2167 | info->io_setup = mem_setup; |
8fe1425a | 2168 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
15a58ed1 | 2169 | } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) { |
1da177e4 | 2170 | info->io_setup = port_setup; |
8fe1425a | 2171 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
1da177e4 LT |
2172 | } else { |
2173 | kfree(info); | |
279fbd0c | 2174 | printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n"); |
1da177e4 LT |
2175 | return -EIO; |
2176 | } | |
b0defcdb | 2177 | info->io.addr_data = spmi->addr.address; |
1da177e4 | 2178 | |
7bb671e3 YL |
2179 | pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n", |
2180 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2181 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2182 | info->irq); | |
2183 | ||
d02b3709 CM |
2184 | rv = add_smi(info); |
2185 | if (rv) | |
7faefea6 | 2186 | kfree(info); |
1da177e4 | 2187 | |
d02b3709 | 2188 | return rv; |
1da177e4 | 2189 | } |
b0defcdb | 2190 | |
2223cbec | 2191 | static void spmi_find_bmc(void) |
b0defcdb CM |
2192 | { |
2193 | acpi_status status; | |
2194 | struct SPMITable *spmi; | |
2195 | int i; | |
2196 | ||
2197 | if (acpi_disabled) | |
2198 | return; | |
2199 | ||
2200 | if (acpi_failure) | |
2201 | return; | |
2202 | ||
2203 | for (i = 0; ; i++) { | |
15a58ed1 AS |
2204 | status = acpi_get_table(ACPI_SIG_SPMI, i+1, |
2205 | (struct acpi_table_header **)&spmi); | |
b0defcdb CM |
2206 | if (status != AE_OK) |
2207 | return; | |
2208 | ||
18a3e0bf | 2209 | try_init_spmi(spmi); |
b0defcdb CM |
2210 | } |
2211 | } | |
9e368fa0 | 2212 | |
2223cbec | 2213 | static int ipmi_pnp_probe(struct pnp_dev *dev, |
9e368fa0 BH |
2214 | const struct pnp_device_id *dev_id) |
2215 | { | |
2216 | struct acpi_device *acpi_dev; | |
2217 | struct smi_info *info; | |
a9e31765 | 2218 | struct resource *res, *res_second; |
9e368fa0 BH |
2219 | acpi_handle handle; |
2220 | acpi_status status; | |
2221 | unsigned long long tmp; | |
d02b3709 | 2222 | int rv; |
9e368fa0 BH |
2223 | |
2224 | acpi_dev = pnp_acpi_device(dev); | |
2225 | if (!acpi_dev) | |
2226 | return -ENODEV; | |
2227 | ||
de5e2ddf | 2228 | info = smi_info_alloc(); |
9e368fa0 BH |
2229 | if (!info) |
2230 | return -ENOMEM; | |
2231 | ||
5fedc4a2 | 2232 | info->addr_source = SI_ACPI; |
279fbd0c | 2233 | printk(KERN_INFO PFX "probing via ACPI\n"); |
9e368fa0 BH |
2234 | |
2235 | handle = acpi_dev->handle; | |
16f4232c | 2236 | info->addr_info.acpi_info.acpi_handle = handle; |
9e368fa0 BH |
2237 | |
2238 | /* _IFT tells us the interface type: KCS, BT, etc */ | |
2239 | status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp); | |
2240 | if (ACPI_FAILURE(status)) | |
2241 | goto err_free; | |
2242 | ||
2243 | switch (tmp) { | |
2244 | case 1: | |
2245 | info->si_type = SI_KCS; | |
2246 | break; | |
2247 | case 2: | |
2248 | info->si_type = SI_SMIC; | |
2249 | break; | |
2250 | case 3: | |
2251 | info->si_type = SI_BT; | |
2252 | break; | |
2253 | default: | |
279fbd0c | 2254 | dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp); |
9e368fa0 BH |
2255 | goto err_free; |
2256 | } | |
2257 | ||
279fbd0c MS |
2258 | res = pnp_get_resource(dev, IORESOURCE_IO, 0); |
2259 | if (res) { | |
9e368fa0 BH |
2260 | info->io_setup = port_setup; |
2261 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
9e368fa0 | 2262 | } else { |
279fbd0c MS |
2263 | res = pnp_get_resource(dev, IORESOURCE_MEM, 0); |
2264 | if (res) { | |
2265 | info->io_setup = mem_setup; | |
2266 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2267 | } | |
2268 | } | |
2269 | if (!res) { | |
9e368fa0 BH |
2270 | dev_err(&dev->dev, "no I/O or memory address\n"); |
2271 | goto err_free; | |
2272 | } | |
279fbd0c | 2273 | info->io.addr_data = res->start; |
9e368fa0 BH |
2274 | |
2275 | info->io.regspacing = DEFAULT_REGSPACING; | |
a9e31765 | 2276 | res_second = pnp_get_resource(dev, |
d9e1b6c4 YL |
2277 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? |
2278 | IORESOURCE_IO : IORESOURCE_MEM, | |
2279 | 1); | |
a9e31765 YL |
2280 | if (res_second) { |
2281 | if (res_second->start > info->io.addr_data) | |
2282 | info->io.regspacing = res_second->start - info->io.addr_data; | |
d9e1b6c4 | 2283 | } |
9e368fa0 BH |
2284 | info->io.regsize = DEFAULT_REGSPACING; |
2285 | info->io.regshift = 0; | |
2286 | ||
2287 | /* If _GPE exists, use it; otherwise use standard interrupts */ | |
2288 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); | |
2289 | if (ACPI_SUCCESS(status)) { | |
2290 | info->irq = tmp; | |
2291 | info->irq_setup = acpi_gpe_irq_setup; | |
2292 | } else if (pnp_irq_valid(dev, 0)) { | |
2293 | info->irq = pnp_irq(dev, 0); | |
2294 | info->irq_setup = std_irq_setup; | |
2295 | } | |
2296 | ||
8c8eae27 | 2297 | info->dev = &dev->dev; |
9e368fa0 BH |
2298 | pnp_set_drvdata(dev, info); |
2299 | ||
279fbd0c MS |
2300 | dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n", |
2301 | res, info->io.regsize, info->io.regspacing, | |
2302 | info->irq); | |
2303 | ||
d02b3709 CM |
2304 | rv = add_smi(info); |
2305 | if (rv) | |
2306 | kfree(info); | |
7faefea6 | 2307 | |
d02b3709 | 2308 | return rv; |
9e368fa0 BH |
2309 | |
2310 | err_free: | |
2311 | kfree(info); | |
2312 | return -EINVAL; | |
2313 | } | |
2314 | ||
39af33fc | 2315 | static void ipmi_pnp_remove(struct pnp_dev *dev) |
9e368fa0 BH |
2316 | { |
2317 | struct smi_info *info = pnp_get_drvdata(dev); | |
2318 | ||
2319 | cleanup_one_si(info); | |
2320 | } | |
2321 | ||
2322 | static const struct pnp_device_id pnp_dev_table[] = { | |
2323 | {"IPI0001", 0}, | |
2324 | {"", 0}, | |
2325 | }; | |
2326 | ||
2327 | static struct pnp_driver ipmi_pnp_driver = { | |
2328 | .name = DEVICE_NAME, | |
2329 | .probe = ipmi_pnp_probe, | |
bcd2982a | 2330 | .remove = ipmi_pnp_remove, |
9e368fa0 BH |
2331 | .id_table = pnp_dev_table, |
2332 | }; | |
a798e2d2 JD |
2333 | |
2334 | MODULE_DEVICE_TABLE(pnp, pnp_dev_table); | |
1da177e4 LT |
2335 | #endif |
2336 | ||
a9fad4cc | 2337 | #ifdef CONFIG_DMI |
c305e3d3 | 2338 | struct dmi_ipmi_data { |
1da177e4 LT |
2339 | u8 type; |
2340 | u8 addr_space; | |
2341 | unsigned long base_addr; | |
2342 | u8 irq; | |
2343 | u8 offset; | |
2344 | u8 slave_addr; | |
b0defcdb | 2345 | }; |
1da177e4 | 2346 | |
2223cbec | 2347 | static int decode_dmi(const struct dmi_header *dm, |
b0defcdb | 2348 | struct dmi_ipmi_data *dmi) |
1da177e4 | 2349 | { |
1855256c | 2350 | const u8 *data = (const u8 *)dm; |
1da177e4 LT |
2351 | unsigned long base_addr; |
2352 | u8 reg_spacing; | |
b224cd3a | 2353 | u8 len = dm->length; |
1da177e4 | 2354 | |
b0defcdb | 2355 | dmi->type = data[4]; |
1da177e4 LT |
2356 | |
2357 | memcpy(&base_addr, data+8, sizeof(unsigned long)); | |
2358 | if (len >= 0x11) { | |
2359 | if (base_addr & 1) { | |
2360 | /* I/O */ | |
2361 | base_addr &= 0xFFFE; | |
b0defcdb | 2362 | dmi->addr_space = IPMI_IO_ADDR_SPACE; |
c305e3d3 | 2363 | } else |
1da177e4 | 2364 | /* Memory */ |
b0defcdb | 2365 | dmi->addr_space = IPMI_MEM_ADDR_SPACE; |
c305e3d3 | 2366 | |
1da177e4 LT |
2367 | /* If bit 4 of byte 0x10 is set, then the lsb for the address |
2368 | is odd. */ | |
b0defcdb | 2369 | dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4); |
1da177e4 | 2370 | |
b0defcdb | 2371 | dmi->irq = data[0x11]; |
1da177e4 LT |
2372 | |
2373 | /* The top two bits of byte 0x10 hold the register spacing. */ | |
b224cd3a | 2374 | reg_spacing = (data[0x10] & 0xC0) >> 6; |
c305e3d3 | 2375 | switch (reg_spacing) { |
1da177e4 | 2376 | case 0x00: /* Byte boundaries */ |
b0defcdb | 2377 | dmi->offset = 1; |
1da177e4 LT |
2378 | break; |
2379 | case 0x01: /* 32-bit boundaries */ | |
b0defcdb | 2380 | dmi->offset = 4; |
1da177e4 LT |
2381 | break; |
2382 | case 0x02: /* 16-byte boundaries */ | |
b0defcdb | 2383 | dmi->offset = 16; |
1da177e4 LT |
2384 | break; |
2385 | default: | |
2386 | /* Some other interface, just ignore it. */ | |
2387 | return -EIO; | |
2388 | } | |
2389 | } else { | |
2390 | /* Old DMI spec. */ | |
c305e3d3 CM |
2391 | /* |
2392 | * Note that technically, the lower bit of the base | |
92068801 CM |
2393 | * address should be 1 if the address is I/O and 0 if |
2394 | * the address is in memory. So many systems get that | |
2395 | * wrong (and all that I have seen are I/O) so we just | |
2396 | * ignore that bit and assume I/O. Systems that use | |
c305e3d3 CM |
2397 | * memory should use the newer spec, anyway. |
2398 | */ | |
b0defcdb CM |
2399 | dmi->base_addr = base_addr & 0xfffe; |
2400 | dmi->addr_space = IPMI_IO_ADDR_SPACE; | |
2401 | dmi->offset = 1; | |
1da177e4 LT |
2402 | } |
2403 | ||
b0defcdb | 2404 | dmi->slave_addr = data[6]; |
1da177e4 | 2405 | |
b0defcdb | 2406 | return 0; |
1da177e4 LT |
2407 | } |
2408 | ||
2223cbec | 2409 | static void try_init_dmi(struct dmi_ipmi_data *ipmi_data) |
1da177e4 | 2410 | { |
b0defcdb | 2411 | struct smi_info *info; |
1da177e4 | 2412 | |
de5e2ddf | 2413 | info = smi_info_alloc(); |
b0defcdb | 2414 | if (!info) { |
279fbd0c | 2415 | printk(KERN_ERR PFX "Could not allocate SI data\n"); |
b0defcdb | 2416 | return; |
1da177e4 | 2417 | } |
1da177e4 | 2418 | |
5fedc4a2 | 2419 | info->addr_source = SI_SMBIOS; |
279fbd0c | 2420 | printk(KERN_INFO PFX "probing via SMBIOS\n"); |
1da177e4 | 2421 | |
e8b33617 | 2422 | switch (ipmi_data->type) { |
b0defcdb CM |
2423 | case 0x01: /* KCS */ |
2424 | info->si_type = SI_KCS; | |
2425 | break; | |
2426 | case 0x02: /* SMIC */ | |
2427 | info->si_type = SI_SMIC; | |
2428 | break; | |
2429 | case 0x03: /* BT */ | |
2430 | info->si_type = SI_BT; | |
2431 | break; | |
2432 | default: | |
80cd6920 | 2433 | kfree(info); |
b0defcdb | 2434 | return; |
1da177e4 | 2435 | } |
1da177e4 | 2436 | |
b0defcdb CM |
2437 | switch (ipmi_data->addr_space) { |
2438 | case IPMI_MEM_ADDR_SPACE: | |
1da177e4 | 2439 | info->io_setup = mem_setup; |
b0defcdb CM |
2440 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; |
2441 | break; | |
2442 | ||
2443 | case IPMI_IO_ADDR_SPACE: | |
1da177e4 | 2444 | info->io_setup = port_setup; |
b0defcdb CM |
2445 | info->io.addr_type = IPMI_IO_ADDR_SPACE; |
2446 | break; | |
2447 | ||
2448 | default: | |
1da177e4 | 2449 | kfree(info); |
279fbd0c | 2450 | printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n", |
b0defcdb CM |
2451 | ipmi_data->addr_space); |
2452 | return; | |
1da177e4 | 2453 | } |
b0defcdb | 2454 | info->io.addr_data = ipmi_data->base_addr; |
1da177e4 | 2455 | |
b0defcdb CM |
2456 | info->io.regspacing = ipmi_data->offset; |
2457 | if (!info->io.regspacing) | |
1da177e4 LT |
2458 | info->io.regspacing = DEFAULT_REGSPACING; |
2459 | info->io.regsize = DEFAULT_REGSPACING; | |
b0defcdb | 2460 | info->io.regshift = 0; |
1da177e4 LT |
2461 | |
2462 | info->slave_addr = ipmi_data->slave_addr; | |
2463 | ||
b0defcdb CM |
2464 | info->irq = ipmi_data->irq; |
2465 | if (info->irq) | |
2466 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2467 | |
7bb671e3 YL |
2468 | pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n", |
2469 | (info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem", | |
2470 | info->io.addr_data, info->io.regsize, info->io.regspacing, | |
2471 | info->irq); | |
2472 | ||
7faefea6 YL |
2473 | if (add_smi(info)) |
2474 | kfree(info); | |
b0defcdb | 2475 | } |
1da177e4 | 2476 | |
2223cbec | 2477 | static void dmi_find_bmc(void) |
b0defcdb | 2478 | { |
1855256c | 2479 | const struct dmi_device *dev = NULL; |
b0defcdb CM |
2480 | struct dmi_ipmi_data data; |
2481 | int rv; | |
2482 | ||
2483 | while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) { | |
397f4ebf | 2484 | memset(&data, 0, sizeof(data)); |
1855256c JG |
2485 | rv = decode_dmi((const struct dmi_header *) dev->device_data, |
2486 | &data); | |
b0defcdb CM |
2487 | if (!rv) |
2488 | try_init_dmi(&data); | |
2489 | } | |
1da177e4 | 2490 | } |
a9fad4cc | 2491 | #endif /* CONFIG_DMI */ |
1da177e4 LT |
2492 | |
2493 | #ifdef CONFIG_PCI | |
2494 | ||
b0defcdb CM |
2495 | #define PCI_ERMC_CLASSCODE 0x0C0700 |
2496 | #define PCI_ERMC_CLASSCODE_MASK 0xffffff00 | |
2497 | #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff | |
2498 | #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00 | |
2499 | #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01 | |
2500 | #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02 | |
2501 | ||
1da177e4 LT |
2502 | #define PCI_HP_VENDOR_ID 0x103C |
2503 | #define PCI_MMC_DEVICE_ID 0x121A | |
2504 | #define PCI_MMC_ADDR_CW 0x10 | |
2505 | ||
b0defcdb CM |
2506 | static void ipmi_pci_cleanup(struct smi_info *info) |
2507 | { | |
2508 | struct pci_dev *pdev = info->addr_source_data; | |
2509 | ||
2510 | pci_disable_device(pdev); | |
2511 | } | |
1da177e4 | 2512 | |
2223cbec | 2513 | static int ipmi_pci_probe_regspacing(struct smi_info *info) |
a6c16c28 CM |
2514 | { |
2515 | if (info->si_type == SI_KCS) { | |
2516 | unsigned char status; | |
2517 | int regspacing; | |
2518 | ||
2519 | info->io.regsize = DEFAULT_REGSIZE; | |
2520 | info->io.regshift = 0; | |
2521 | info->io_size = 2; | |
2522 | info->handlers = &kcs_smi_handlers; | |
2523 | ||
2524 | /* detect 1, 4, 16byte spacing */ | |
2525 | for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) { | |
2526 | info->io.regspacing = regspacing; | |
2527 | if (info->io_setup(info)) { | |
2528 | dev_err(info->dev, | |
2529 | "Could not setup I/O space\n"); | |
2530 | return DEFAULT_REGSPACING; | |
2531 | } | |
2532 | /* write invalid cmd */ | |
2533 | info->io.outputb(&info->io, 1, 0x10); | |
2534 | /* read status back */ | |
2535 | status = info->io.inputb(&info->io, 1); | |
2536 | info->io_cleanup(info); | |
2537 | if (status) | |
2538 | return regspacing; | |
2539 | regspacing *= 4; | |
2540 | } | |
2541 | } | |
2542 | return DEFAULT_REGSPACING; | |
2543 | } | |
2544 | ||
2223cbec | 2545 | static int ipmi_pci_probe(struct pci_dev *pdev, |
b0defcdb | 2546 | const struct pci_device_id *ent) |
1da177e4 | 2547 | { |
b0defcdb CM |
2548 | int rv; |
2549 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
2550 | struct smi_info *info; | |
1da177e4 | 2551 | |
de5e2ddf | 2552 | info = smi_info_alloc(); |
b0defcdb | 2553 | if (!info) |
1cd441f9 | 2554 | return -ENOMEM; |
1da177e4 | 2555 | |
5fedc4a2 | 2556 | info->addr_source = SI_PCI; |
279fbd0c | 2557 | dev_info(&pdev->dev, "probing via PCI"); |
1da177e4 | 2558 | |
b0defcdb CM |
2559 | switch (class_type) { |
2560 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
2561 | info->si_type = SI_SMIC; | |
2562 | break; | |
1da177e4 | 2563 | |
b0defcdb CM |
2564 | case PCI_ERMC_CLASSCODE_TYPE_KCS: |
2565 | info->si_type = SI_KCS; | |
2566 | break; | |
2567 | ||
2568 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
2569 | info->si_type = SI_BT; | |
2570 | break; | |
2571 | ||
2572 | default: | |
2573 | kfree(info); | |
279fbd0c | 2574 | dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type); |
1cd441f9 | 2575 | return -ENOMEM; |
1da177e4 LT |
2576 | } |
2577 | ||
b0defcdb CM |
2578 | rv = pci_enable_device(pdev); |
2579 | if (rv) { | |
279fbd0c | 2580 | dev_err(&pdev->dev, "couldn't enable PCI device\n"); |
b0defcdb CM |
2581 | kfree(info); |
2582 | return rv; | |
1da177e4 LT |
2583 | } |
2584 | ||
b0defcdb CM |
2585 | info->addr_source_cleanup = ipmi_pci_cleanup; |
2586 | info->addr_source_data = pdev; | |
1da177e4 | 2587 | |
b0defcdb CM |
2588 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
2589 | info->io_setup = port_setup; | |
2590 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2591 | } else { | |
2592 | info->io_setup = mem_setup; | |
2593 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
1da177e4 | 2594 | } |
b0defcdb | 2595 | info->io.addr_data = pci_resource_start(pdev, 0); |
1da177e4 | 2596 | |
a6c16c28 CM |
2597 | info->io.regspacing = ipmi_pci_probe_regspacing(info); |
2598 | info->io.regsize = DEFAULT_REGSIZE; | |
b0defcdb | 2599 | info->io.regshift = 0; |
1da177e4 | 2600 | |
b0defcdb CM |
2601 | info->irq = pdev->irq; |
2602 | if (info->irq) | |
2603 | info->irq_setup = std_irq_setup; | |
1da177e4 | 2604 | |
50c812b2 | 2605 | info->dev = &pdev->dev; |
fca3b747 | 2606 | pci_set_drvdata(pdev, info); |
50c812b2 | 2607 | |
279fbd0c MS |
2608 | dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n", |
2609 | &pdev->resource[0], info->io.regsize, info->io.regspacing, | |
2610 | info->irq); | |
2611 | ||
d02b3709 CM |
2612 | rv = add_smi(info); |
2613 | if (rv) { | |
7faefea6 | 2614 | kfree(info); |
d02b3709 CM |
2615 | pci_disable_device(pdev); |
2616 | } | |
7faefea6 | 2617 | |
d02b3709 | 2618 | return rv; |
b0defcdb | 2619 | } |
1da177e4 | 2620 | |
39af33fc | 2621 | static void ipmi_pci_remove(struct pci_dev *pdev) |
b0defcdb | 2622 | { |
fca3b747 CM |
2623 | struct smi_info *info = pci_get_drvdata(pdev); |
2624 | cleanup_one_si(info); | |
d02b3709 | 2625 | pci_disable_device(pdev); |
b0defcdb | 2626 | } |
1da177e4 | 2627 | |
b0defcdb CM |
2628 | static struct pci_device_id ipmi_pci_devices[] = { |
2629 | { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) }, | |
248bdd5e KC |
2630 | { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) }, |
2631 | { 0, } | |
b0defcdb CM |
2632 | }; |
2633 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
2634 | ||
2635 | static struct pci_driver ipmi_pci_driver = { | |
c305e3d3 CM |
2636 | .name = DEVICE_NAME, |
2637 | .id_table = ipmi_pci_devices, | |
2638 | .probe = ipmi_pci_probe, | |
bcd2982a | 2639 | .remove = ipmi_pci_remove, |
b0defcdb CM |
2640 | }; |
2641 | #endif /* CONFIG_PCI */ | |
1da177e4 | 2642 | |
b1608d69 | 2643 | static struct of_device_id ipmi_match[]; |
2223cbec | 2644 | static int ipmi_probe(struct platform_device *dev) |
dba9b4f6 | 2645 | { |
a1e9c9dd | 2646 | #ifdef CONFIG_OF |
b1608d69 | 2647 | const struct of_device_id *match; |
dba9b4f6 CM |
2648 | struct smi_info *info; |
2649 | struct resource resource; | |
da81c3b9 | 2650 | const __be32 *regsize, *regspacing, *regshift; |
61c7a080 | 2651 | struct device_node *np = dev->dev.of_node; |
dba9b4f6 CM |
2652 | int ret; |
2653 | int proplen; | |
2654 | ||
279fbd0c | 2655 | dev_info(&dev->dev, "probing via device tree\n"); |
dba9b4f6 | 2656 | |
b1608d69 GL |
2657 | match = of_match_device(ipmi_match, &dev->dev); |
2658 | if (!match) | |
a1e9c9dd RH |
2659 | return -EINVAL; |
2660 | ||
dba9b4f6 CM |
2661 | ret = of_address_to_resource(np, 0, &resource); |
2662 | if (ret) { | |
2663 | dev_warn(&dev->dev, PFX "invalid address from OF\n"); | |
2664 | return ret; | |
2665 | } | |
2666 | ||
9c25099d | 2667 | regsize = of_get_property(np, "reg-size", &proplen); |
dba9b4f6 CM |
2668 | if (regsize && proplen != 4) { |
2669 | dev_warn(&dev->dev, PFX "invalid regsize from OF\n"); | |
2670 | return -EINVAL; | |
2671 | } | |
2672 | ||
9c25099d | 2673 | regspacing = of_get_property(np, "reg-spacing", &proplen); |
dba9b4f6 CM |
2674 | if (regspacing && proplen != 4) { |
2675 | dev_warn(&dev->dev, PFX "invalid regspacing from OF\n"); | |
2676 | return -EINVAL; | |
2677 | } | |
2678 | ||
9c25099d | 2679 | regshift = of_get_property(np, "reg-shift", &proplen); |
dba9b4f6 CM |
2680 | if (regshift && proplen != 4) { |
2681 | dev_warn(&dev->dev, PFX "invalid regshift from OF\n"); | |
2682 | return -EINVAL; | |
2683 | } | |
2684 | ||
de5e2ddf | 2685 | info = smi_info_alloc(); |
dba9b4f6 CM |
2686 | |
2687 | if (!info) { | |
2688 | dev_err(&dev->dev, | |
279fbd0c | 2689 | "could not allocate memory for OF probe\n"); |
dba9b4f6 CM |
2690 | return -ENOMEM; |
2691 | } | |
2692 | ||
b1608d69 | 2693 | info->si_type = (enum si_type) match->data; |
5fedc4a2 | 2694 | info->addr_source = SI_DEVICETREE; |
dba9b4f6 CM |
2695 | info->irq_setup = std_irq_setup; |
2696 | ||
3b7ec117 NC |
2697 | if (resource.flags & IORESOURCE_IO) { |
2698 | info->io_setup = port_setup; | |
2699 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
2700 | } else { | |
2701 | info->io_setup = mem_setup; | |
2702 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2703 | } | |
2704 | ||
dba9b4f6 CM |
2705 | info->io.addr_data = resource.start; |
2706 | ||
da81c3b9 RH |
2707 | info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE; |
2708 | info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING; | |
2709 | info->io.regshift = regshift ? be32_to_cpup(regshift) : 0; | |
dba9b4f6 | 2710 | |
61c7a080 | 2711 | info->irq = irq_of_parse_and_map(dev->dev.of_node, 0); |
dba9b4f6 CM |
2712 | info->dev = &dev->dev; |
2713 | ||
279fbd0c | 2714 | dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n", |
dba9b4f6 CM |
2715 | info->io.addr_data, info->io.regsize, info->io.regspacing, |
2716 | info->irq); | |
2717 | ||
9de33df4 | 2718 | dev_set_drvdata(&dev->dev, info); |
dba9b4f6 | 2719 | |
d02b3709 CM |
2720 | ret = add_smi(info); |
2721 | if (ret) { | |
7faefea6 | 2722 | kfree(info); |
d02b3709 | 2723 | return ret; |
7faefea6 | 2724 | } |
a1e9c9dd | 2725 | #endif |
7faefea6 | 2726 | return 0; |
dba9b4f6 CM |
2727 | } |
2728 | ||
39af33fc | 2729 | static int ipmi_remove(struct platform_device *dev) |
dba9b4f6 | 2730 | { |
a1e9c9dd | 2731 | #ifdef CONFIG_OF |
9de33df4 | 2732 | cleanup_one_si(dev_get_drvdata(&dev->dev)); |
a1e9c9dd | 2733 | #endif |
dba9b4f6 CM |
2734 | return 0; |
2735 | } | |
2736 | ||
2737 | static struct of_device_id ipmi_match[] = | |
2738 | { | |
c305e3d3 CM |
2739 | { .type = "ipmi", .compatible = "ipmi-kcs", |
2740 | .data = (void *)(unsigned long) SI_KCS }, | |
2741 | { .type = "ipmi", .compatible = "ipmi-smic", | |
2742 | .data = (void *)(unsigned long) SI_SMIC }, | |
2743 | { .type = "ipmi", .compatible = "ipmi-bt", | |
2744 | .data = (void *)(unsigned long) SI_BT }, | |
dba9b4f6 CM |
2745 | {}, |
2746 | }; | |
2747 | ||
a1e9c9dd | 2748 | static struct platform_driver ipmi_driver = { |
4018294b | 2749 | .driver = { |
a1e9c9dd | 2750 | .name = DEVICE_NAME, |
4018294b GL |
2751 | .owner = THIS_MODULE, |
2752 | .of_match_table = ipmi_match, | |
2753 | }, | |
a1e9c9dd | 2754 | .probe = ipmi_probe, |
bcd2982a | 2755 | .remove = ipmi_remove, |
dba9b4f6 | 2756 | }; |
dba9b4f6 | 2757 | |
fdbeb7de TB |
2758 | #ifdef CONFIG_PARISC |
2759 | static int ipmi_parisc_probe(struct parisc_device *dev) | |
2760 | { | |
2761 | struct smi_info *info; | |
dfa19426 | 2762 | int rv; |
fdbeb7de TB |
2763 | |
2764 | info = smi_info_alloc(); | |
2765 | ||
2766 | if (!info) { | |
2767 | dev_err(&dev->dev, | |
2768 | "could not allocate memory for PARISC probe\n"); | |
2769 | return -ENOMEM; | |
2770 | } | |
2771 | ||
2772 | info->si_type = SI_KCS; | |
2773 | info->addr_source = SI_DEVICETREE; | |
2774 | info->io_setup = mem_setup; | |
2775 | info->io.addr_type = IPMI_MEM_ADDR_SPACE; | |
2776 | info->io.addr_data = dev->hpa.start; | |
2777 | info->io.regsize = 1; | |
2778 | info->io.regspacing = 1; | |
2779 | info->io.regshift = 0; | |
2780 | info->irq = 0; /* no interrupt */ | |
2781 | info->irq_setup = NULL; | |
2782 | info->dev = &dev->dev; | |
2783 | ||
2784 | dev_dbg(&dev->dev, "addr 0x%lx\n", info->io.addr_data); | |
2785 | ||
2786 | dev_set_drvdata(&dev->dev, info); | |
2787 | ||
d02b3709 CM |
2788 | rv = add_smi(info); |
2789 | if (rv) { | |
fdbeb7de | 2790 | kfree(info); |
d02b3709 | 2791 | return rv; |
fdbeb7de TB |
2792 | } |
2793 | ||
2794 | return 0; | |
2795 | } | |
2796 | ||
2797 | static int ipmi_parisc_remove(struct parisc_device *dev) | |
2798 | { | |
2799 | cleanup_one_si(dev_get_drvdata(&dev->dev)); | |
2800 | return 0; | |
2801 | } | |
2802 | ||
2803 | static struct parisc_device_id ipmi_parisc_tbl[] = { | |
2804 | { HPHW_MC, HVERSION_REV_ANY_ID, 0x004, 0xC0 }, | |
2805 | { 0, } | |
2806 | }; | |
2807 | ||
2808 | static struct parisc_driver ipmi_parisc_driver = { | |
2809 | .name = "ipmi", | |
2810 | .id_table = ipmi_parisc_tbl, | |
2811 | .probe = ipmi_parisc_probe, | |
2812 | .remove = ipmi_parisc_remove, | |
2813 | }; | |
2814 | #endif /* CONFIG_PARISC */ | |
2815 | ||
40112ae7 | 2816 | static int wait_for_msg_done(struct smi_info *smi_info) |
1da177e4 | 2817 | { |
50c812b2 | 2818 | enum si_sm_result smi_result; |
1da177e4 LT |
2819 | |
2820 | smi_result = smi_info->handlers->event(smi_info->si_sm, 0); | |
c305e3d3 | 2821 | for (;;) { |
c3e7e791 CM |
2822 | if (smi_result == SI_SM_CALL_WITH_DELAY || |
2823 | smi_result == SI_SM_CALL_WITH_TICK_DELAY) { | |
da4cd8df | 2824 | schedule_timeout_uninterruptible(1); |
1da177e4 | 2825 | smi_result = smi_info->handlers->event( |
e21404dc | 2826 | smi_info->si_sm, jiffies_to_usecs(1)); |
c305e3d3 | 2827 | } else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) { |
1da177e4 LT |
2828 | smi_result = smi_info->handlers->event( |
2829 | smi_info->si_sm, 0); | |
c305e3d3 | 2830 | } else |
1da177e4 LT |
2831 | break; |
2832 | } | |
40112ae7 | 2833 | if (smi_result == SI_SM_HOSED) |
c305e3d3 CM |
2834 | /* |
2835 | * We couldn't get the state machine to run, so whatever's at | |
2836 | * the port is probably not an IPMI SMI interface. | |
2837 | */ | |
40112ae7 CM |
2838 | return -ENODEV; |
2839 | ||
2840 | return 0; | |
2841 | } | |
2842 | ||
2843 | static int try_get_dev_id(struct smi_info *smi_info) | |
2844 | { | |
2845 | unsigned char msg[2]; | |
2846 | unsigned char *resp; | |
2847 | unsigned long resp_len; | |
2848 | int rv = 0; | |
2849 | ||
2850 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2851 | if (!resp) | |
2852 | return -ENOMEM; | |
2853 | ||
2854 | /* | |
2855 | * Do a Get Device ID command, since it comes back with some | |
2856 | * useful info. | |
2857 | */ | |
2858 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2859 | msg[1] = IPMI_GET_DEVICE_ID_CMD; | |
2860 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2861 | ||
2862 | rv = wait_for_msg_done(smi_info); | |
2863 | if (rv) | |
1da177e4 | 2864 | goto out; |
1da177e4 | 2865 | |
1da177e4 LT |
2866 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, |
2867 | resp, IPMI_MAX_MSG_LENGTH); | |
1da177e4 | 2868 | |
d8c98618 CM |
2869 | /* Check and record info from the get device id, in case we need it. */ |
2870 | rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id); | |
1da177e4 LT |
2871 | |
2872 | out: | |
2873 | kfree(resp); | |
2874 | return rv; | |
2875 | } | |
2876 | ||
40112ae7 CM |
2877 | static int try_enable_event_buffer(struct smi_info *smi_info) |
2878 | { | |
2879 | unsigned char msg[3]; | |
2880 | unsigned char *resp; | |
2881 | unsigned long resp_len; | |
2882 | int rv = 0; | |
2883 | ||
2884 | resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
2885 | if (!resp) | |
2886 | return -ENOMEM; | |
2887 | ||
2888 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2889 | msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD; | |
2890 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2); | |
2891 | ||
2892 | rv = wait_for_msg_done(smi_info); | |
2893 | if (rv) { | |
279fbd0c MS |
2894 | printk(KERN_WARNING PFX "Error getting response from get" |
2895 | " global enables command, the event buffer is not" | |
40112ae7 CM |
2896 | " enabled.\n"); |
2897 | goto out; | |
2898 | } | |
2899 | ||
2900 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2901 | resp, IPMI_MAX_MSG_LENGTH); | |
2902 | ||
2903 | if (resp_len < 4 || | |
2904 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2905 | resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD || | |
2906 | resp[2] != 0) { | |
279fbd0c MS |
2907 | printk(KERN_WARNING PFX "Invalid return from get global" |
2908 | " enables command, cannot enable the event buffer.\n"); | |
40112ae7 CM |
2909 | rv = -EINVAL; |
2910 | goto out; | |
2911 | } | |
2912 | ||
2913 | if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) | |
2914 | /* buffer is already enabled, nothing to do. */ | |
2915 | goto out; | |
2916 | ||
2917 | msg[0] = IPMI_NETFN_APP_REQUEST << 2; | |
2918 | msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD; | |
2919 | msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF; | |
2920 | smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3); | |
2921 | ||
2922 | rv = wait_for_msg_done(smi_info); | |
2923 | if (rv) { | |
279fbd0c MS |
2924 | printk(KERN_WARNING PFX "Error getting response from set" |
2925 | " global, enables command, the event buffer is not" | |
40112ae7 CM |
2926 | " enabled.\n"); |
2927 | goto out; | |
2928 | } | |
2929 | ||
2930 | resp_len = smi_info->handlers->get_result(smi_info->si_sm, | |
2931 | resp, IPMI_MAX_MSG_LENGTH); | |
2932 | ||
2933 | if (resp_len < 3 || | |
2934 | resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 || | |
2935 | resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) { | |
279fbd0c MS |
2936 | printk(KERN_WARNING PFX "Invalid return from get global," |
2937 | "enables command, not enable the event buffer.\n"); | |
40112ae7 CM |
2938 | rv = -EINVAL; |
2939 | goto out; | |
2940 | } | |
2941 | ||
2942 | if (resp[2] != 0) | |
2943 | /* | |
2944 | * An error when setting the event buffer bit means | |
2945 | * that the event buffer is not supported. | |
2946 | */ | |
2947 | rv = -ENOENT; | |
2948 | out: | |
2949 | kfree(resp); | |
2950 | return rv; | |
2951 | } | |
2952 | ||
07412736 | 2953 | static int smi_type_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2954 | { |
07412736 | 2955 | struct smi_info *smi = m->private; |
1da177e4 | 2956 | |
07412736 | 2957 | return seq_printf(m, "%s\n", si_to_str[smi->si_type]); |
1da177e4 LT |
2958 | } |
2959 | ||
07412736 | 2960 | static int smi_type_proc_open(struct inode *inode, struct file *file) |
1da177e4 | 2961 | { |
d9dda78b | 2962 | return single_open(file, smi_type_proc_show, PDE_DATA(inode)); |
07412736 AD |
2963 | } |
2964 | ||
2965 | static const struct file_operations smi_type_proc_ops = { | |
2966 | .open = smi_type_proc_open, | |
2967 | .read = seq_read, | |
2968 | .llseek = seq_lseek, | |
2969 | .release = single_release, | |
2970 | }; | |
2971 | ||
2972 | static int smi_si_stats_proc_show(struct seq_file *m, void *v) | |
2973 | { | |
2974 | struct smi_info *smi = m->private; | |
1da177e4 | 2975 | |
07412736 | 2976 | seq_printf(m, "interrupts_enabled: %d\n", |
b0defcdb | 2977 | smi->irq && !smi->interrupt_disabled); |
07412736 | 2978 | seq_printf(m, "short_timeouts: %u\n", |
64959e2d | 2979 | smi_get_stat(smi, short_timeouts)); |
07412736 | 2980 | seq_printf(m, "long_timeouts: %u\n", |
64959e2d | 2981 | smi_get_stat(smi, long_timeouts)); |
07412736 | 2982 | seq_printf(m, "idles: %u\n", |
64959e2d | 2983 | smi_get_stat(smi, idles)); |
07412736 | 2984 | seq_printf(m, "interrupts: %u\n", |
64959e2d | 2985 | smi_get_stat(smi, interrupts)); |
07412736 | 2986 | seq_printf(m, "attentions: %u\n", |
64959e2d | 2987 | smi_get_stat(smi, attentions)); |
07412736 | 2988 | seq_printf(m, "flag_fetches: %u\n", |
64959e2d | 2989 | smi_get_stat(smi, flag_fetches)); |
07412736 | 2990 | seq_printf(m, "hosed_count: %u\n", |
64959e2d | 2991 | smi_get_stat(smi, hosed_count)); |
07412736 | 2992 | seq_printf(m, "complete_transactions: %u\n", |
64959e2d | 2993 | smi_get_stat(smi, complete_transactions)); |
07412736 | 2994 | seq_printf(m, "events: %u\n", |
64959e2d | 2995 | smi_get_stat(smi, events)); |
07412736 | 2996 | seq_printf(m, "watchdog_pretimeouts: %u\n", |
64959e2d | 2997 | smi_get_stat(smi, watchdog_pretimeouts)); |
07412736 | 2998 | seq_printf(m, "incoming_messages: %u\n", |
64959e2d | 2999 | smi_get_stat(smi, incoming_messages)); |
07412736 AD |
3000 | return 0; |
3001 | } | |
1da177e4 | 3002 | |
07412736 AD |
3003 | static int smi_si_stats_proc_open(struct inode *inode, struct file *file) |
3004 | { | |
d9dda78b | 3005 | return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode)); |
b361e27b CM |
3006 | } |
3007 | ||
07412736 AD |
3008 | static const struct file_operations smi_si_stats_proc_ops = { |
3009 | .open = smi_si_stats_proc_open, | |
3010 | .read = seq_read, | |
3011 | .llseek = seq_lseek, | |
3012 | .release = single_release, | |
3013 | }; | |
3014 | ||
3015 | static int smi_params_proc_show(struct seq_file *m, void *v) | |
b361e27b | 3016 | { |
07412736 | 3017 | struct smi_info *smi = m->private; |
b361e27b | 3018 | |
07412736 | 3019 | return seq_printf(m, |
b361e27b CM |
3020 | "%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n", |
3021 | si_to_str[smi->si_type], | |
3022 | addr_space_to_str[smi->io.addr_type], | |
3023 | smi->io.addr_data, | |
3024 | smi->io.regspacing, | |
3025 | smi->io.regsize, | |
3026 | smi->io.regshift, | |
3027 | smi->irq, | |
3028 | smi->slave_addr); | |
1da177e4 LT |
3029 | } |
3030 | ||
07412736 AD |
3031 | static int smi_params_proc_open(struct inode *inode, struct file *file) |
3032 | { | |
d9dda78b | 3033 | return single_open(file, smi_params_proc_show, PDE_DATA(inode)); |
07412736 AD |
3034 | } |
3035 | ||
3036 | static const struct file_operations smi_params_proc_ops = { | |
3037 | .open = smi_params_proc_open, | |
3038 | .read = seq_read, | |
3039 | .llseek = seq_lseek, | |
3040 | .release = single_release, | |
3041 | }; | |
3042 | ||
3ae0e0f9 CM |
3043 | /* |
3044 | * oem_data_avail_to_receive_msg_avail | |
3045 | * @info - smi_info structure with msg_flags set | |
3046 | * | |
3047 | * Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL | |
3048 | * Returns 1 indicating need to re-run handle_flags(). | |
3049 | */ | |
3050 | static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info) | |
3051 | { | |
e8b33617 | 3052 | smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) | |
c305e3d3 | 3053 | RECEIVE_MSG_AVAIL); |
3ae0e0f9 CM |
3054 | return 1; |
3055 | } | |
3056 | ||
3057 | /* | |
3058 | * setup_dell_poweredge_oem_data_handler | |
3059 | * @info - smi_info.device_id must be populated | |
3060 | * | |
3061 | * Systems that match, but have firmware version < 1.40 may assert | |
3062 | * OEM0_DATA_AVAIL on their own, without being told via Set Flags that | |
3063 | * it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL | |
3064 | * upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags | |
3065 | * as RECEIVE_MSG_AVAIL instead. | |
3066 | * | |
3067 | * As Dell has no plans to release IPMI 1.5 firmware that *ever* | |
3068 | * assert the OEM[012] bits, and if it did, the driver would have to | |
3069 | * change to handle that properly, we don't actually check for the | |
3070 | * firmware version. | |
3071 | * Device ID = 0x20 BMC on PowerEdge 8G servers | |
3072 | * Device Revision = 0x80 | |
3073 | * Firmware Revision1 = 0x01 BMC version 1.40 | |
3074 | * Firmware Revision2 = 0x40 BCD encoded | |
3075 | * IPMI Version = 0x51 IPMI 1.5 | |
3076 | * Manufacturer ID = A2 02 00 Dell IANA | |
3077 | * | |
d5a2b89a CM |
3078 | * Additionally, PowerEdge systems with IPMI < 1.5 may also assert |
3079 | * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL. | |
3080 | * | |
3ae0e0f9 CM |
3081 | */ |
3082 | #define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20 | |
3083 | #define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80 | |
3084 | #define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51 | |
50c812b2 | 3085 | #define DELL_IANA_MFR_ID 0x0002a2 |
3ae0e0f9 CM |
3086 | static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info) |
3087 | { | |
3088 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3089 | if (id->manufacturer_id == DELL_IANA_MFR_ID) { |
d5a2b89a CM |
3090 | if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID && |
3091 | id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV && | |
50c812b2 | 3092 | id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) { |
d5a2b89a CM |
3093 | smi_info->oem_data_avail_handler = |
3094 | oem_data_avail_to_receive_msg_avail; | |
c305e3d3 CM |
3095 | } else if (ipmi_version_major(id) < 1 || |
3096 | (ipmi_version_major(id) == 1 && | |
3097 | ipmi_version_minor(id) < 5)) { | |
d5a2b89a CM |
3098 | smi_info->oem_data_avail_handler = |
3099 | oem_data_avail_to_receive_msg_avail; | |
3100 | } | |
3ae0e0f9 CM |
3101 | } |
3102 | } | |
3103 | ||
ea94027b CM |
3104 | #define CANNOT_RETURN_REQUESTED_LENGTH 0xCA |
3105 | static void return_hosed_msg_badsize(struct smi_info *smi_info) | |
3106 | { | |
3107 | struct ipmi_smi_msg *msg = smi_info->curr_msg; | |
3108 | ||
25985edc | 3109 | /* Make it a response */ |
ea94027b CM |
3110 | msg->rsp[0] = msg->data[0] | 4; |
3111 | msg->rsp[1] = msg->data[1]; | |
3112 | msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH; | |
3113 | msg->rsp_size = 3; | |
3114 | smi_info->curr_msg = NULL; | |
3115 | deliver_recv_msg(smi_info, msg); | |
3116 | } | |
3117 | ||
3118 | /* | |
3119 | * dell_poweredge_bt_xaction_handler | |
3120 | * @info - smi_info.device_id must be populated | |
3121 | * | |
3122 | * Dell PowerEdge servers with the BT interface (x6xx and 1750) will | |
3123 | * not respond to a Get SDR command if the length of the data | |
3124 | * requested is exactly 0x3A, which leads to command timeouts and no | |
3125 | * data returned. This intercepts such commands, and causes userspace | |
3126 | * callers to try again with a different-sized buffer, which succeeds. | |
3127 | */ | |
3128 | ||
3129 | #define STORAGE_NETFN 0x0A | |
3130 | #define STORAGE_CMD_GET_SDR 0x23 | |
3131 | static int dell_poweredge_bt_xaction_handler(struct notifier_block *self, | |
3132 | unsigned long unused, | |
3133 | void *in) | |
3134 | { | |
3135 | struct smi_info *smi_info = in; | |
3136 | unsigned char *data = smi_info->curr_msg->data; | |
3137 | unsigned int size = smi_info->curr_msg->data_size; | |
3138 | if (size >= 8 && | |
3139 | (data[0]>>2) == STORAGE_NETFN && | |
3140 | data[1] == STORAGE_CMD_GET_SDR && | |
3141 | data[7] == 0x3A) { | |
3142 | return_hosed_msg_badsize(smi_info); | |
3143 | return NOTIFY_STOP; | |
3144 | } | |
3145 | return NOTIFY_DONE; | |
3146 | } | |
3147 | ||
3148 | static struct notifier_block dell_poweredge_bt_xaction_notifier = { | |
3149 | .notifier_call = dell_poweredge_bt_xaction_handler, | |
3150 | }; | |
3151 | ||
3152 | /* | |
3153 | * setup_dell_poweredge_bt_xaction_handler | |
3154 | * @info - smi_info.device_id must be filled in already | |
3155 | * | |
3156 | * Fills in smi_info.device_id.start_transaction_pre_hook | |
3157 | * when we know what function to use there. | |
3158 | */ | |
3159 | static void | |
3160 | setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info) | |
3161 | { | |
3162 | struct ipmi_device_id *id = &smi_info->device_id; | |
50c812b2 | 3163 | if (id->manufacturer_id == DELL_IANA_MFR_ID && |
ea94027b CM |
3164 | smi_info->si_type == SI_BT) |
3165 | register_xaction_notifier(&dell_poweredge_bt_xaction_notifier); | |
3166 | } | |
3167 | ||
3ae0e0f9 CM |
3168 | /* |
3169 | * setup_oem_data_handler | |
3170 | * @info - smi_info.device_id must be filled in already | |
3171 | * | |
3172 | * Fills in smi_info.device_id.oem_data_available_handler | |
3173 | * when we know what function to use there. | |
3174 | */ | |
3175 | ||
3176 | static void setup_oem_data_handler(struct smi_info *smi_info) | |
3177 | { | |
3178 | setup_dell_poweredge_oem_data_handler(smi_info); | |
3179 | } | |
3180 | ||
ea94027b CM |
3181 | static void setup_xaction_handlers(struct smi_info *smi_info) |
3182 | { | |
3183 | setup_dell_poweredge_bt_xaction_handler(smi_info); | |
3184 | } | |
3185 | ||
a9a2c44f CM |
3186 | static inline void wait_for_timer_and_thread(struct smi_info *smi_info) |
3187 | { | |
453823ba | 3188 | if (smi_info->intf) { |
c305e3d3 CM |
3189 | /* |
3190 | * The timer and thread are only running if the | |
3191 | * interface has been started up and registered. | |
3192 | */ | |
453823ba CM |
3193 | if (smi_info->thread != NULL) |
3194 | kthread_stop(smi_info->thread); | |
3195 | del_timer_sync(&smi_info->si_timer); | |
3196 | } | |
a9a2c44f CM |
3197 | } |
3198 | ||
0bbed20e | 3199 | static struct ipmi_default_vals |
b0defcdb CM |
3200 | { |
3201 | int type; | |
3202 | int port; | |
7420884c | 3203 | } ipmi_defaults[] = |
b0defcdb CM |
3204 | { |
3205 | { .type = SI_KCS, .port = 0xca2 }, | |
3206 | { .type = SI_SMIC, .port = 0xca9 }, | |
3207 | { .type = SI_BT, .port = 0xe4 }, | |
3208 | { .port = 0 } | |
3209 | }; | |
3210 | ||
2223cbec | 3211 | static void default_find_bmc(void) |
b0defcdb CM |
3212 | { |
3213 | struct smi_info *info; | |
3214 | int i; | |
3215 | ||
3216 | for (i = 0; ; i++) { | |
3217 | if (!ipmi_defaults[i].port) | |
3218 | break; | |
68e1ee62 | 3219 | #ifdef CONFIG_PPC |
4ff31d77 CK |
3220 | if (check_legacy_ioport(ipmi_defaults[i].port)) |
3221 | continue; | |
3222 | #endif | |
de5e2ddf | 3223 | info = smi_info_alloc(); |
a09f4855 AM |
3224 | if (!info) |
3225 | return; | |
4ff31d77 | 3226 | |
5fedc4a2 | 3227 | info->addr_source = SI_DEFAULT; |
b0defcdb CM |
3228 | |
3229 | info->si_type = ipmi_defaults[i].type; | |
3230 | info->io_setup = port_setup; | |
3231 | info->io.addr_data = ipmi_defaults[i].port; | |
3232 | info->io.addr_type = IPMI_IO_ADDR_SPACE; | |
3233 | ||
3234 | info->io.addr = NULL; | |
3235 | info->io.regspacing = DEFAULT_REGSPACING; | |
3236 | info->io.regsize = DEFAULT_REGSPACING; | |
3237 | info->io.regshift = 0; | |
3238 | ||
2407d77a MG |
3239 | if (add_smi(info) == 0) { |
3240 | if ((try_smi_init(info)) == 0) { | |
3241 | /* Found one... */ | |
279fbd0c | 3242 | printk(KERN_INFO PFX "Found default %s" |
2407d77a MG |
3243 | " state machine at %s address 0x%lx\n", |
3244 | si_to_str[info->si_type], | |
3245 | addr_space_to_str[info->io.addr_type], | |
3246 | info->io.addr_data); | |
3247 | } else | |
3248 | cleanup_one_si(info); | |
7faefea6 YL |
3249 | } else { |
3250 | kfree(info); | |
b0defcdb CM |
3251 | } |
3252 | } | |
3253 | } | |
3254 | ||
3255 | static int is_new_interface(struct smi_info *info) | |
1da177e4 | 3256 | { |
b0defcdb | 3257 | struct smi_info *e; |
1da177e4 | 3258 | |
b0defcdb CM |
3259 | list_for_each_entry(e, &smi_infos, link) { |
3260 | if (e->io.addr_type != info->io.addr_type) | |
3261 | continue; | |
3262 | if (e->io.addr_data == info->io.addr_data) | |
3263 | return 0; | |
3264 | } | |
1da177e4 | 3265 | |
b0defcdb CM |
3266 | return 1; |
3267 | } | |
1da177e4 | 3268 | |
2407d77a | 3269 | static int add_smi(struct smi_info *new_smi) |
b0defcdb | 3270 | { |
2407d77a | 3271 | int rv = 0; |
b0defcdb | 3272 | |
279fbd0c | 3273 | printk(KERN_INFO PFX "Adding %s-specified %s state machine", |
2407d77a MG |
3274 | ipmi_addr_src_to_str[new_smi->addr_source], |
3275 | si_to_str[new_smi->si_type]); | |
d6dfd131 | 3276 | mutex_lock(&smi_infos_lock); |
b0defcdb | 3277 | if (!is_new_interface(new_smi)) { |
7bb671e3 | 3278 | printk(KERN_CONT " duplicate interface\n"); |
b0defcdb CM |
3279 | rv = -EBUSY; |
3280 | goto out_err; | |
3281 | } | |
1da177e4 | 3282 | |
2407d77a MG |
3283 | printk(KERN_CONT "\n"); |
3284 | ||
1da177e4 LT |
3285 | /* So we know not to free it unless we have allocated one. */ |
3286 | new_smi->intf = NULL; | |
3287 | new_smi->si_sm = NULL; | |
3288 | new_smi->handlers = NULL; | |
3289 | ||
2407d77a MG |
3290 | list_add_tail(&new_smi->link, &smi_infos); |
3291 | ||
3292 | out_err: | |
3293 | mutex_unlock(&smi_infos_lock); | |
3294 | return rv; | |
3295 | } | |
3296 | ||
3297 | static int try_smi_init(struct smi_info *new_smi) | |
3298 | { | |
3299 | int rv = 0; | |
3300 | int i; | |
3301 | ||
279fbd0c | 3302 | printk(KERN_INFO PFX "Trying %s-specified %s state" |
2407d77a MG |
3303 | " machine at %s address 0x%lx, slave address 0x%x," |
3304 | " irq %d\n", | |
3305 | ipmi_addr_src_to_str[new_smi->addr_source], | |
3306 | si_to_str[new_smi->si_type], | |
3307 | addr_space_to_str[new_smi->io.addr_type], | |
3308 | new_smi->io.addr_data, | |
3309 | new_smi->slave_addr, new_smi->irq); | |
3310 | ||
b0defcdb CM |
3311 | switch (new_smi->si_type) { |
3312 | case SI_KCS: | |
1da177e4 | 3313 | new_smi->handlers = &kcs_smi_handlers; |
b0defcdb CM |
3314 | break; |
3315 | ||
3316 | case SI_SMIC: | |
1da177e4 | 3317 | new_smi->handlers = &smic_smi_handlers; |
b0defcdb CM |
3318 | break; |
3319 | ||
3320 | case SI_BT: | |
1da177e4 | 3321 | new_smi->handlers = &bt_smi_handlers; |
b0defcdb CM |
3322 | break; |
3323 | ||
3324 | default: | |
1da177e4 LT |
3325 | /* No support for anything else yet. */ |
3326 | rv = -EIO; | |
3327 | goto out_err; | |
3328 | } | |
3329 | ||
3330 | /* Allocate the state machine's data and initialize it. */ | |
3331 | new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL); | |
b0defcdb | 3332 | if (!new_smi->si_sm) { |
279fbd0c MS |
3333 | printk(KERN_ERR PFX |
3334 | "Could not allocate state machine memory\n"); | |
1da177e4 LT |
3335 | rv = -ENOMEM; |
3336 | goto out_err; | |
3337 | } | |
3338 | new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm, | |
3339 | &new_smi->io); | |
3340 | ||
3341 | /* Now that we know the I/O size, we can set up the I/O. */ | |
3342 | rv = new_smi->io_setup(new_smi); | |
3343 | if (rv) { | |
279fbd0c | 3344 | printk(KERN_ERR PFX "Could not set up I/O space\n"); |
1da177e4 LT |
3345 | goto out_err; |
3346 | } | |
3347 | ||
1da177e4 LT |
3348 | /* Do low-level detection first. */ |
3349 | if (new_smi->handlers->detect(new_smi->si_sm)) { | |
b0defcdb | 3350 | if (new_smi->addr_source) |
279fbd0c | 3351 | printk(KERN_INFO PFX "Interface detection failed\n"); |
1da177e4 LT |
3352 | rv = -ENODEV; |
3353 | goto out_err; | |
3354 | } | |
3355 | ||
c305e3d3 CM |
3356 | /* |
3357 | * Attempt a get device id command. If it fails, we probably | |
3358 | * don't have a BMC here. | |
3359 | */ | |
1da177e4 | 3360 | rv = try_get_dev_id(new_smi); |
b0defcdb CM |
3361 | if (rv) { |
3362 | if (new_smi->addr_source) | |
279fbd0c | 3363 | printk(KERN_INFO PFX "There appears to be no BMC" |
b0defcdb | 3364 | " at this location\n"); |
1da177e4 | 3365 | goto out_err; |
b0defcdb | 3366 | } |
1da177e4 | 3367 | |
3ae0e0f9 | 3368 | setup_oem_data_handler(new_smi); |
ea94027b | 3369 | setup_xaction_handlers(new_smi); |
3ae0e0f9 | 3370 | |
1da177e4 LT |
3371 | INIT_LIST_HEAD(&(new_smi->xmit_msgs)); |
3372 | INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); | |
3373 | new_smi->curr_msg = NULL; | |
3374 | atomic_set(&new_smi->req_events, 0); | |
3375 | new_smi->run_to_completion = 0; | |
64959e2d CM |
3376 | for (i = 0; i < SI_NUM_STATS; i++) |
3377 | atomic_set(&new_smi->stats[i], 0); | |
1da177e4 | 3378 | |
ea4078ca | 3379 | new_smi->interrupt_disabled = 1; |
a9a2c44f | 3380 | atomic_set(&new_smi->stop_operation, 0); |
89986496 | 3381 | atomic_set(&new_smi->need_watch, 0); |
b0defcdb CM |
3382 | new_smi->intf_num = smi_num; |
3383 | smi_num++; | |
1da177e4 | 3384 | |
40112ae7 CM |
3385 | rv = try_enable_event_buffer(new_smi); |
3386 | if (rv == 0) | |
3387 | new_smi->has_event_buffer = 1; | |
3388 | ||
c305e3d3 CM |
3389 | /* |
3390 | * Start clearing the flags before we enable interrupts or the | |
3391 | * timer to avoid racing with the timer. | |
3392 | */ | |
1da177e4 LT |
3393 | start_clear_flags(new_smi); |
3394 | /* IRQ is defined to be set when non-zero. */ | |
3395 | if (new_smi->irq) | |
3396 | new_smi->si_state = SI_CLEARING_FLAGS_THEN_SET_IRQ; | |
3397 | ||
50c812b2 | 3398 | if (!new_smi->dev) { |
c305e3d3 CM |
3399 | /* |
3400 | * If we don't already have a device from something | |
3401 | * else (like PCI), then register a new one. | |
3402 | */ | |
50c812b2 CM |
3403 | new_smi->pdev = platform_device_alloc("ipmi_si", |
3404 | new_smi->intf_num); | |
8b32b5d0 | 3405 | if (!new_smi->pdev) { |
279fbd0c MS |
3406 | printk(KERN_ERR PFX |
3407 | "Unable to allocate platform device\n"); | |
453823ba | 3408 | goto out_err; |
50c812b2 CM |
3409 | } |
3410 | new_smi->dev = &new_smi->pdev->dev; | |
fe2d5ffc | 3411 | new_smi->dev->driver = &ipmi_driver.driver; |
50c812b2 | 3412 | |
b48f5457 | 3413 | rv = platform_device_add(new_smi->pdev); |
50c812b2 | 3414 | if (rv) { |
279fbd0c MS |
3415 | printk(KERN_ERR PFX |
3416 | "Unable to register system interface device:" | |
50c812b2 CM |
3417 | " %d\n", |
3418 | rv); | |
453823ba | 3419 | goto out_err; |
50c812b2 CM |
3420 | } |
3421 | new_smi->dev_registered = 1; | |
3422 | } | |
3423 | ||
1da177e4 LT |
3424 | rv = ipmi_register_smi(&handlers, |
3425 | new_smi, | |
50c812b2 CM |
3426 | &new_smi->device_id, |
3427 | new_smi->dev, | |
759643b8 | 3428 | "bmc", |
453823ba | 3429 | new_smi->slave_addr); |
1da177e4 | 3430 | if (rv) { |
279fbd0c MS |
3431 | dev_err(new_smi->dev, "Unable to register device: error %d\n", |
3432 | rv); | |
1da177e4 LT |
3433 | goto out_err_stop_timer; |
3434 | } | |
3435 | ||
3436 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "type", | |
07412736 | 3437 | &smi_type_proc_ops, |
99b76233 | 3438 | new_smi); |
1da177e4 | 3439 | if (rv) { |
279fbd0c | 3440 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3441 | goto out_err_stop_timer; |
3442 | } | |
3443 | ||
3444 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats", | |
07412736 | 3445 | &smi_si_stats_proc_ops, |
99b76233 | 3446 | new_smi); |
1da177e4 | 3447 | if (rv) { |
279fbd0c | 3448 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
1da177e4 LT |
3449 | goto out_err_stop_timer; |
3450 | } | |
3451 | ||
b361e27b | 3452 | rv = ipmi_smi_add_proc_entry(new_smi->intf, "params", |
07412736 | 3453 | &smi_params_proc_ops, |
99b76233 | 3454 | new_smi); |
b361e27b | 3455 | if (rv) { |
279fbd0c | 3456 | dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv); |
b361e27b CM |
3457 | goto out_err_stop_timer; |
3458 | } | |
3459 | ||
279fbd0c MS |
3460 | dev_info(new_smi->dev, "IPMI %s interface initialized\n", |
3461 | si_to_str[new_smi->si_type]); | |
1da177e4 LT |
3462 | |
3463 | return 0; | |
3464 | ||
3465 | out_err_stop_timer: | |
a9a2c44f CM |
3466 | atomic_inc(&new_smi->stop_operation); |
3467 | wait_for_timer_and_thread(new_smi); | |
1da177e4 LT |
3468 | |
3469 | out_err: | |
2407d77a MG |
3470 | new_smi->interrupt_disabled = 1; |
3471 | ||
3472 | if (new_smi->intf) { | |
1da177e4 | 3473 | ipmi_unregister_smi(new_smi->intf); |
2407d77a MG |
3474 | new_smi->intf = NULL; |
3475 | } | |
1da177e4 | 3476 | |
2407d77a | 3477 | if (new_smi->irq_cleanup) { |
b0defcdb | 3478 | new_smi->irq_cleanup(new_smi); |
2407d77a MG |
3479 | new_smi->irq_cleanup = NULL; |
3480 | } | |
1da177e4 | 3481 | |
c305e3d3 CM |
3482 | /* |
3483 | * Wait until we know that we are out of any interrupt | |
3484 | * handlers might have been running before we freed the | |
3485 | * interrupt. | |
3486 | */ | |
fbd568a3 | 3487 | synchronize_sched(); |
1da177e4 LT |
3488 | |
3489 | if (new_smi->si_sm) { | |
3490 | if (new_smi->handlers) | |
3491 | new_smi->handlers->cleanup(new_smi->si_sm); | |
3492 | kfree(new_smi->si_sm); | |
2407d77a | 3493 | new_smi->si_sm = NULL; |
1da177e4 | 3494 | } |
2407d77a | 3495 | if (new_smi->addr_source_cleanup) { |
b0defcdb | 3496 | new_smi->addr_source_cleanup(new_smi); |
2407d77a MG |
3497 | new_smi->addr_source_cleanup = NULL; |
3498 | } | |
3499 | if (new_smi->io_cleanup) { | |
7767e126 | 3500 | new_smi->io_cleanup(new_smi); |
2407d77a MG |
3501 | new_smi->io_cleanup = NULL; |
3502 | } | |
1da177e4 | 3503 | |
2407d77a | 3504 | if (new_smi->dev_registered) { |
50c812b2 | 3505 | platform_device_unregister(new_smi->pdev); |
2407d77a MG |
3506 | new_smi->dev_registered = 0; |
3507 | } | |
b0defcdb | 3508 | |
1da177e4 LT |
3509 | return rv; |
3510 | } | |
3511 | ||
2223cbec | 3512 | static int init_ipmi_si(void) |
1da177e4 | 3513 | { |
1da177e4 LT |
3514 | int i; |
3515 | char *str; | |
50c812b2 | 3516 | int rv; |
2407d77a | 3517 | struct smi_info *e; |
06ee4594 | 3518 | enum ipmi_addr_src type = SI_INVALID; |
1da177e4 LT |
3519 | |
3520 | if (initialized) | |
3521 | return 0; | |
3522 | initialized = 1; | |
3523 | ||
f2afae46 CM |
3524 | if (si_tryplatform) { |
3525 | rv = platform_driver_register(&ipmi_driver); | |
3526 | if (rv) { | |
3527 | printk(KERN_ERR PFX "Unable to register " | |
3528 | "driver: %d\n", rv); | |
3529 | return rv; | |
3530 | } | |
50c812b2 CM |
3531 | } |
3532 | ||
1da177e4 LT |
3533 | /* Parse out the si_type string into its components. */ |
3534 | str = si_type_str; | |
3535 | if (*str != '\0') { | |
e8b33617 | 3536 | for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { |
1da177e4 LT |
3537 | si_type[i] = str; |
3538 | str = strchr(str, ','); | |
3539 | if (str) { | |
3540 | *str = '\0'; | |
3541 | str++; | |
3542 | } else { | |
3543 | break; | |
3544 | } | |
3545 | } | |
3546 | } | |
3547 | ||
1fdd75bd | 3548 | printk(KERN_INFO "IPMI System Interface driver.\n"); |
1da177e4 | 3549 | |
d8cc5267 | 3550 | /* If the user gave us a device, they presumably want us to use it */ |
a1e9c9dd | 3551 | if (!hardcode_find_bmc()) |
d8cc5267 | 3552 | return 0; |
d8cc5267 | 3553 | |
b0defcdb | 3554 | #ifdef CONFIG_PCI |
f2afae46 CM |
3555 | if (si_trypci) { |
3556 | rv = pci_register_driver(&ipmi_pci_driver); | |
3557 | if (rv) | |
3558 | printk(KERN_ERR PFX "Unable to register " | |
3559 | "PCI driver: %d\n", rv); | |
3560 | else | |
3561 | pci_registered = 1; | |
3562 | } | |
b0defcdb CM |
3563 | #endif |
3564 | ||
754d4531 | 3565 | #ifdef CONFIG_ACPI |
d941aeae CM |
3566 | if (si_tryacpi) { |
3567 | pnp_register_driver(&ipmi_pnp_driver); | |
3568 | pnp_registered = 1; | |
3569 | } | |
754d4531 MG |
3570 | #endif |
3571 | ||
3572 | #ifdef CONFIG_DMI | |
d941aeae CM |
3573 | if (si_trydmi) |
3574 | dmi_find_bmc(); | |
754d4531 MG |
3575 | #endif |
3576 | ||
3577 | #ifdef CONFIG_ACPI | |
d941aeae CM |
3578 | if (si_tryacpi) |
3579 | spmi_find_bmc(); | |
754d4531 MG |
3580 | #endif |
3581 | ||
fdbeb7de TB |
3582 | #ifdef CONFIG_PARISC |
3583 | register_parisc_driver(&ipmi_parisc_driver); | |
3584 | parisc_registered = 1; | |
3585 | /* poking PC IO addresses will crash machine, don't do it */ | |
3586 | si_trydefaults = 0; | |
3587 | #endif | |
3588 | ||
06ee4594 MG |
3589 | /* We prefer devices with interrupts, but in the case of a machine |
3590 | with multiple BMCs we assume that there will be several instances | |
3591 | of a given type so if we succeed in registering a type then also | |
3592 | try to register everything else of the same type */ | |
d8cc5267 | 3593 | |
2407d77a MG |
3594 | mutex_lock(&smi_infos_lock); |
3595 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 MG |
3596 | /* Try to register a device if it has an IRQ and we either |
3597 | haven't successfully registered a device yet or this | |
3598 | device has the same type as one we successfully registered */ | |
3599 | if (e->irq && (!type || e->addr_source == type)) { | |
d8cc5267 | 3600 | if (!try_smi_init(e)) { |
06ee4594 | 3601 | type = e->addr_source; |
d8cc5267 MG |
3602 | } |
3603 | } | |
3604 | } | |
3605 | ||
06ee4594 MG |
3606 | /* type will only have been set if we successfully registered an si */ |
3607 | if (type) { | |
3608 | mutex_unlock(&smi_infos_lock); | |
3609 | return 0; | |
3610 | } | |
3611 | ||
d8cc5267 MG |
3612 | /* Fall back to the preferred device */ |
3613 | ||
3614 | list_for_each_entry(e, &smi_infos, link) { | |
06ee4594 | 3615 | if (!e->irq && (!type || e->addr_source == type)) { |
d8cc5267 | 3616 | if (!try_smi_init(e)) { |
06ee4594 | 3617 | type = e->addr_source; |
d8cc5267 MG |
3618 | } |
3619 | } | |
2407d77a MG |
3620 | } |
3621 | mutex_unlock(&smi_infos_lock); | |
3622 | ||
06ee4594 MG |
3623 | if (type) |
3624 | return 0; | |
3625 | ||
b0defcdb | 3626 | if (si_trydefaults) { |
d6dfd131 | 3627 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3628 | if (list_empty(&smi_infos)) { |
3629 | /* No BMC was found, try defaults. */ | |
d6dfd131 | 3630 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3631 | default_find_bmc(); |
2407d77a | 3632 | } else |
d6dfd131 | 3633 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3634 | } |
3635 | ||
d6dfd131 | 3636 | mutex_lock(&smi_infos_lock); |
b361e27b | 3637 | if (unload_when_empty && list_empty(&smi_infos)) { |
d6dfd131 | 3638 | mutex_unlock(&smi_infos_lock); |
d2478521 | 3639 | cleanup_ipmi_si(); |
279fbd0c MS |
3640 | printk(KERN_WARNING PFX |
3641 | "Unable to find any System Interface(s)\n"); | |
1da177e4 | 3642 | return -ENODEV; |
b0defcdb | 3643 | } else { |
d6dfd131 | 3644 | mutex_unlock(&smi_infos_lock); |
b0defcdb | 3645 | return 0; |
1da177e4 | 3646 | } |
1da177e4 LT |
3647 | } |
3648 | module_init(init_ipmi_si); | |
3649 | ||
b361e27b | 3650 | static void cleanup_one_si(struct smi_info *to_clean) |
1da177e4 | 3651 | { |
2407d77a | 3652 | int rv = 0; |
1da177e4 LT |
3653 | unsigned long flags; |
3654 | ||
b0defcdb | 3655 | if (!to_clean) |
1da177e4 LT |
3656 | return; |
3657 | ||
b0defcdb CM |
3658 | list_del(&to_clean->link); |
3659 | ||
ee6cd5f8 | 3660 | /* Tell the driver that we are shutting down. */ |
a9a2c44f | 3661 | atomic_inc(&to_clean->stop_operation); |
b0defcdb | 3662 | |
c305e3d3 CM |
3663 | /* |
3664 | * Make sure the timer and thread are stopped and will not run | |
3665 | * again. | |
3666 | */ | |
a9a2c44f | 3667 | wait_for_timer_and_thread(to_clean); |
1da177e4 | 3668 | |
c305e3d3 CM |
3669 | /* |
3670 | * Timeouts are stopped, now make sure the interrupts are off | |
3671 | * for the device. A little tricky with locks to make sure | |
3672 | * there are no races. | |
3673 | */ | |
ee6cd5f8 CM |
3674 | spin_lock_irqsave(&to_clean->si_lock, flags); |
3675 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3676 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3677 | poll(to_clean); | |
3678 | schedule_timeout_uninterruptible(1); | |
3679 | spin_lock_irqsave(&to_clean->si_lock, flags); | |
3680 | } | |
3681 | disable_si_irq(to_clean); | |
3682 | spin_unlock_irqrestore(&to_clean->si_lock, flags); | |
3683 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { | |
3684 | poll(to_clean); | |
3685 | schedule_timeout_uninterruptible(1); | |
3686 | } | |
3687 | ||
3688 | /* Clean up interrupts and make sure that everything is done. */ | |
3689 | if (to_clean->irq_cleanup) | |
3690 | to_clean->irq_cleanup(to_clean); | |
e8b33617 | 3691 | while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) { |
1da177e4 | 3692 | poll(to_clean); |
da4cd8df | 3693 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
3694 | } |
3695 | ||
2407d77a MG |
3696 | if (to_clean->intf) |
3697 | rv = ipmi_unregister_smi(to_clean->intf); | |
3698 | ||
1da177e4 | 3699 | if (rv) { |
279fbd0c | 3700 | printk(KERN_ERR PFX "Unable to unregister device: errno=%d\n", |
1da177e4 LT |
3701 | rv); |
3702 | } | |
3703 | ||
2407d77a MG |
3704 | if (to_clean->handlers) |
3705 | to_clean->handlers->cleanup(to_clean->si_sm); | |
1da177e4 LT |
3706 | |
3707 | kfree(to_clean->si_sm); | |
3708 | ||
b0defcdb CM |
3709 | if (to_clean->addr_source_cleanup) |
3710 | to_clean->addr_source_cleanup(to_clean); | |
7767e126 PG |
3711 | if (to_clean->io_cleanup) |
3712 | to_clean->io_cleanup(to_clean); | |
50c812b2 CM |
3713 | |
3714 | if (to_clean->dev_registered) | |
3715 | platform_device_unregister(to_clean->pdev); | |
3716 | ||
3717 | kfree(to_clean); | |
1da177e4 LT |
3718 | } |
3719 | ||
0dcf334c | 3720 | static void cleanup_ipmi_si(void) |
1da177e4 | 3721 | { |
b0defcdb | 3722 | struct smi_info *e, *tmp_e; |
1da177e4 | 3723 | |
b0defcdb | 3724 | if (!initialized) |
1da177e4 LT |
3725 | return; |
3726 | ||
b0defcdb | 3727 | #ifdef CONFIG_PCI |
56480287 MG |
3728 | if (pci_registered) |
3729 | pci_unregister_driver(&ipmi_pci_driver); | |
b0defcdb | 3730 | #endif |
27d0567a | 3731 | #ifdef CONFIG_ACPI |
561f8182 YL |
3732 | if (pnp_registered) |
3733 | pnp_unregister_driver(&ipmi_pnp_driver); | |
9e368fa0 | 3734 | #endif |
fdbeb7de TB |
3735 | #ifdef CONFIG_PARISC |
3736 | if (parisc_registered) | |
3737 | unregister_parisc_driver(&ipmi_parisc_driver); | |
3738 | #endif | |
b0defcdb | 3739 | |
a1e9c9dd | 3740 | platform_driver_unregister(&ipmi_driver); |
dba9b4f6 | 3741 | |
d6dfd131 | 3742 | mutex_lock(&smi_infos_lock); |
b0defcdb CM |
3743 | list_for_each_entry_safe(e, tmp_e, &smi_infos, link) |
3744 | cleanup_one_si(e); | |
d6dfd131 | 3745 | mutex_unlock(&smi_infos_lock); |
1da177e4 LT |
3746 | } |
3747 | module_exit(cleanup_ipmi_si); | |
3748 | ||
3749 | MODULE_LICENSE("GPL"); | |
1fdd75bd | 3750 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
c305e3d3 CM |
3751 | MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT" |
3752 | " system interfaces."); |