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1534c382 | 1 | /* |
75014550 | 2 | * Copyright IBM Corp. 2006, 2012 |
1534c382 MS |
3 | * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> |
4 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
5 | * Ralph Wuerthner <rwuerthn@de.ibm.com> | |
cb17a636 | 6 | * Felix Beck <felix.beck@de.ibm.com> |
6bed05bc | 7 | * Holger Dengler <hd@linux.vnet.ibm.com> |
1534c382 MS |
8 | * |
9 | * Adjunct processor bus. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2, or (at your option) | |
14 | * any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
136f7a1c MS |
26 | #define KMSG_COMPONENT "ap" |
27 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
28 | ||
62d146ff | 29 | #include <linux/kernel_stat.h> |
1534c382 MS |
30 | #include <linux/module.h> |
31 | #include <linux/init.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/err.h> | |
34 | #include <linux/interrupt.h> | |
35 | #include <linux/workqueue.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
1534c382 MS |
37 | #include <linux/notifier.h> |
38 | #include <linux/kthread.h> | |
39 | #include <linux/mutex.h> | |
83e9d5d2 | 40 | #include <linux/suspend.h> |
85eca850 | 41 | #include <asm/reset.h> |
cb17a636 | 42 | #include <asm/airq.h> |
60063497 | 43 | #include <linux/atomic.h> |
cb17a636 | 44 | #include <asm/isc.h> |
fe137230 FB |
45 | #include <linux/hrtimer.h> |
46 | #include <linux/ktime.h> | |
a0616cde | 47 | #include <asm/facility.h> |
5d26a105 | 48 | #include <linux/crypto.h> |
e28d2af4 | 49 | #include <linux/mod_devicetable.h> |
cccd85bf | 50 | #include <linux/debugfs.h> |
1534c382 MS |
51 | |
52 | #include "ap_bus.h" | |
0db78559 | 53 | #include "ap_asm.h" |
cccd85bf | 54 | #include "ap_debug.h" |
1534c382 | 55 | |
1749a81d | 56 | /* |
1534c382 MS |
57 | * Module description. |
58 | */ | |
59 | MODULE_AUTHOR("IBM Corporation"); | |
75014550 HD |
60 | MODULE_DESCRIPTION("Adjunct Processor Bus driver, " \ |
61 | "Copyright IBM Corp. 2006, 2012"); | |
1534c382 | 62 | MODULE_LICENSE("GPL"); |
5d26a105 | 63 | MODULE_ALIAS_CRYPTO("z90crypt"); |
1534c382 | 64 | |
1749a81d | 65 | /* |
1534c382 MS |
66 | * Module parameter |
67 | */ | |
68 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ | |
fc1d3f02 | 69 | static DEFINE_SPINLOCK(ap_domain_lock); |
c1a42f49 | 70 | module_param_named(domain, ap_domain_index, int, S_IRUSR|S_IRGRP); |
1534c382 MS |
71 | MODULE_PARM_DESC(domain, "domain index for ap devices"); |
72 | EXPORT_SYMBOL(ap_domain_index); | |
73 | ||
b90b34c6 | 74 | static int ap_thread_flag = 0; |
c1a42f49 | 75 | module_param_named(poll_thread, ap_thread_flag, int, S_IRUSR|S_IRGRP); |
b90b34c6 | 76 | MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)."); |
1534c382 | 77 | |
e28d2af4 IT |
78 | static struct device *ap_root_device; |
79 | ||
80 | DEFINE_SPINLOCK(ap_list_lock); | |
81 | LIST_HEAD(ap_card_list); | |
82 | ||
75014550 | 83 | static struct ap_config_info *ap_configuration; |
e387753c | 84 | static bool initialised; |
1534c382 | 85 | |
cccd85bf HF |
86 | /* |
87 | * AP bus related debug feature things. | |
88 | */ | |
89 | static struct dentry *ap_dbf_root; | |
90 | debug_info_t *ap_dbf_info; | |
91 | ||
1749a81d | 92 | /* |
8139b89d | 93 | * Workqueue timer for bus rescan. |
1534c382 | 94 | */ |
1534c382 MS |
95 | static struct timer_list ap_config_timer; |
96 | static int ap_config_time = AP_CONFIG_TIME; | |
3f3007af | 97 | static void ap_scan_bus(struct work_struct *); |
8139b89d | 98 | static DECLARE_WORK(ap_scan_work, ap_scan_bus); |
1534c382 | 99 | |
1749a81d | 100 | /* |
cb17a636 | 101 | * Tasklet & timer for AP request polling and interrupts |
1534c382 | 102 | */ |
3f3007af MS |
103 | static void ap_tasklet_fn(unsigned long); |
104 | static DECLARE_TASKLET(ap_tasklet, ap_tasklet_fn, 0); | |
1534c382 MS |
105 | static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait); |
106 | static struct task_struct *ap_poll_kthread = NULL; | |
107 | static DEFINE_MUTEX(ap_poll_thread_mutex); | |
93521314 | 108 | static DEFINE_SPINLOCK(ap_poll_timer_lock); |
fe137230 FB |
109 | static struct hrtimer ap_poll_timer; |
110 | /* In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds. | |
111 | * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling.*/ | |
112 | static unsigned long long poll_timeout = 250000; | |
1534c382 | 113 | |
772f5472 FB |
114 | /* Suspend flag */ |
115 | static int ap_suspend_flag; | |
889875a1 MS |
116 | /* Maximum domain id */ |
117 | static int ap_max_domain_id; | |
5314af69 FB |
118 | /* Flag to check if domain was set through module parameter domain=. This is |
119 | * important when supsend and resume is done in a z/VM environment where the | |
120 | * domain might change. */ | |
121 | static int user_set_domain = 0; | |
772f5472 FB |
122 | static struct bus_type ap_bus_type; |
123 | ||
f4eae94f | 124 | /* Adapter interrupt definitions */ |
3f3007af MS |
125 | static void ap_interrupt_handler(struct airq_struct *airq); |
126 | ||
f4eae94f MS |
127 | static int ap_airq_flag; |
128 | ||
129 | static struct airq_struct ap_airq = { | |
130 | .handler = ap_interrupt_handler, | |
131 | .isc = AP_ISC, | |
132 | }; | |
133 | ||
cb17a636 FB |
134 | /** |
135 | * ap_using_interrupts() - Returns non-zero if interrupt support is | |
136 | * available. | |
137 | */ | |
138 | static inline int ap_using_interrupts(void) | |
139 | { | |
f4eae94f | 140 | return ap_airq_flag; |
cb17a636 FB |
141 | } |
142 | ||
e28d2af4 IT |
143 | /** |
144 | * ap_airq_ptr() - Get the address of the adapter interrupt indicator | |
145 | * | |
146 | * Returns the address of the local-summary-indicator of the adapter | |
147 | * interrupt handler for AP, or NULL if adapter interrupts are not | |
148 | * available. | |
149 | */ | |
150 | void *ap_airq_ptr(void) | |
151 | { | |
152 | if (ap_using_interrupts()) | |
153 | return ap_airq.lsi_ptr; | |
154 | return NULL; | |
155 | } | |
156 | ||
cb17a636 FB |
157 | /** |
158 | * ap_interrupts_available(): Test if AP interrupts are available. | |
159 | * | |
160 | * Returns 1 if AP interrupts are available. | |
161 | */ | |
162 | static int ap_interrupts_available(void) | |
163 | { | |
86cd741b | 164 | return test_facility(65); |
cb17a636 FB |
165 | } |
166 | ||
75014550 HD |
167 | /** |
168 | * ap_configuration_available(): Test if AP configuration | |
169 | * information is available. | |
170 | * | |
171 | * Returns 1 if AP configuration information is available. | |
172 | */ | |
173 | static int ap_configuration_available(void) | |
174 | { | |
86cd741b | 175 | return test_facility(12); |
75014550 HD |
176 | } |
177 | ||
1534c382 | 178 | /** |
1749a81d FB |
179 | * ap_test_queue(): Test adjunct processor queue. |
180 | * @qid: The AP queue number | |
6acbe21f | 181 | * @info: Pointer to queue descriptor |
1534c382 | 182 | * |
1749a81d | 183 | * Returns AP queue status structure. |
1534c382 MS |
184 | */ |
185 | static inline struct ap_queue_status | |
6acbe21f | 186 | ap_test_queue(ap_qid_t qid, unsigned long *info) |
1534c382 | 187 | { |
6acbe21f | 188 | if (test_facility(15)) |
11d37673 | 189 | qid |= 1UL << 23; /* set APFT T bit*/ |
0db78559 | 190 | return ap_tapq(qid, info); |
75014550 | 191 | } |
75014550 | 192 | |
11d37673 HC |
193 | static inline int ap_query_configuration(void) |
194 | { | |
195 | if (!ap_configuration) | |
196 | return -EOPNOTSUPP; | |
0db78559 | 197 | return ap_qci(ap_configuration); |
11d37673 HC |
198 | } |
199 | ||
889875a1 MS |
200 | /** |
201 | * ap_init_configuration(): Allocate and query configuration array. | |
202 | */ | |
203 | static void ap_init_configuration(void) | |
204 | { | |
205 | if (!ap_configuration_available()) | |
206 | return; | |
207 | ||
208 | ap_configuration = kzalloc(sizeof(*ap_configuration), GFP_KERNEL); | |
209 | if (!ap_configuration) | |
210 | return; | |
211 | if (ap_query_configuration() != 0) { | |
212 | kfree(ap_configuration); | |
213 | ap_configuration = NULL; | |
214 | return; | |
215 | } | |
216 | } | |
217 | ||
218 | /* | |
219 | * ap_test_config(): helper function to extract the nrth bit | |
220 | * within the unsigned int array field. | |
221 | */ | |
222 | static inline int ap_test_config(unsigned int *field, unsigned int nr) | |
223 | { | |
224 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
225 | } | |
226 | ||
227 | /* | |
228 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
229 | * @id AP card ID | |
230 | * | |
231 | * Returns 0 if the card is not configured | |
232 | * 1 if the card is configured or | |
233 | * if the configuration information is not available | |
234 | */ | |
235 | static inline int ap_test_config_card_id(unsigned int id) | |
236 | { | |
237 | if (!ap_configuration) /* QCI not supported */ | |
238 | return 1; | |
239 | return ap_test_config(ap_configuration->apm, id); | |
240 | } | |
241 | ||
242 | /* | |
243 | * ap_test_config_domain(): Test, whether an AP usage domain is configured. | |
244 | * @domain AP usage domain ID | |
245 | * | |
246 | * Returns 0 if the usage domain is not configured | |
247 | * 1 if the usage domain is configured or | |
248 | * if the configuration information is not available | |
249 | */ | |
250 | static inline int ap_test_config_domain(unsigned int domain) | |
251 | { | |
252 | if (!ap_configuration) /* QCI not supported */ | |
253 | return domain < 16; | |
254 | return ap_test_config(ap_configuration->aqm, domain); | |
255 | } | |
256 | ||
1534c382 | 257 | /** |
1749a81d FB |
258 | * ap_query_queue(): Check if an AP queue is available. |
259 | * @qid: The AP queue number | |
260 | * @queue_depth: Pointer to queue depth value | |
261 | * @device_type: Pointer to device type value | |
6acbe21f | 262 | * @facilities: Pointer to facility indicator |
1534c382 | 263 | */ |
6acbe21f MS |
264 | static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type, |
265 | unsigned int *facilities) | |
1534c382 MS |
266 | { |
267 | struct ap_queue_status status; | |
6acbe21f | 268 | unsigned long info; |
889875a1 MS |
269 | int nd; |
270 | ||
e28d2af4 | 271 | if (!ap_test_config_card_id(AP_QID_CARD(qid))) |
889875a1 | 272 | return -ENODEV; |
1534c382 | 273 | |
6acbe21f | 274 | status = ap_test_queue(qid, &info); |
c50a160c IT |
275 | switch (status.response_code) { |
276 | case AP_RESPONSE_NORMAL: | |
6acbe21f MS |
277 | *queue_depth = (int)(info & 0xff); |
278 | *device_type = (int)((info >> 24) & 0xff); | |
279 | *facilities = (unsigned int)(info >> 32); | |
889875a1 MS |
280 | /* Update maximum domain id */ |
281 | nd = (info >> 16) & 0xff; | |
c1c1368d | 282 | /* if N bit is available, z13 and newer */ |
889875a1 MS |
283 | if ((info & (1UL << 57)) && nd > 0) |
284 | ap_max_domain_id = nd; | |
c1c1368d IT |
285 | else /* older machine types */ |
286 | ap_max_domain_id = 15; | |
14878424 HF |
287 | switch (*device_type) { |
288 | /* For CEX2 and CEX3 the available functions | |
289 | * are not refrected by the facilities bits. | |
290 | * Instead it is coded into the type. So here | |
291 | * modify the function bits based on the type. | |
292 | */ | |
293 | case AP_DEVICE_TYPE_CEX2A: | |
294 | case AP_DEVICE_TYPE_CEX3A: | |
295 | *facilities |= 0x08000000; | |
296 | break; | |
297 | case AP_DEVICE_TYPE_CEX2C: | |
298 | case AP_DEVICE_TYPE_CEX3C: | |
299 | *facilities |= 0x10000000; | |
300 | break; | |
301 | default: | |
302 | break; | |
303 | } | |
c50a160c IT |
304 | return 0; |
305 | case AP_RESPONSE_Q_NOT_AVAIL: | |
306 | case AP_RESPONSE_DECONFIGURED: | |
307 | case AP_RESPONSE_CHECKSTOPPED: | |
308 | case AP_RESPONSE_INVALID_ADDRESS: | |
309 | return -ENODEV; | |
310 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
311 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
312 | case AP_RESPONSE_BUSY: | |
313 | return -EBUSY; | |
314 | default: | |
315 | BUG(); | |
1534c382 | 316 | } |
1534c382 MS |
317 | } |
318 | ||
e28d2af4 | 319 | void ap_wait(enum ap_wait wait) |
3f3007af MS |
320 | { |
321 | ktime_t hr_time; | |
322 | ||
323 | switch (wait) { | |
324 | case AP_WAIT_AGAIN: | |
325 | case AP_WAIT_INTERRUPT: | |
326 | if (ap_using_interrupts()) | |
327 | break; | |
328 | if (ap_poll_kthread) { | |
329 | wake_up(&ap_poll_wait); | |
330 | break; | |
331 | } | |
332 | /* Fall through */ | |
333 | case AP_WAIT_TIMEOUT: | |
334 | spin_lock_bh(&ap_poll_timer_lock); | |
335 | if (!hrtimer_is_queued(&ap_poll_timer)) { | |
8b0e1953 | 336 | hr_time = poll_timeout; |
3f3007af MS |
337 | hrtimer_forward_now(&ap_poll_timer, hr_time); |
338 | hrtimer_restart(&ap_poll_timer); | |
339 | } | |
340 | spin_unlock_bh(&ap_poll_timer_lock); | |
341 | break; | |
342 | case AP_WAIT_NONE: | |
343 | default: | |
344 | break; | |
345 | } | |
346 | } | |
347 | ||
3f3007af MS |
348 | /** |
349 | * ap_request_timeout(): Handling of request timeouts | |
350 | * @data: Holds the AP device. | |
351 | * | |
352 | * Handles request timeouts. | |
353 | */ | |
e28d2af4 | 354 | void ap_request_timeout(unsigned long data) |
3f3007af | 355 | { |
e28d2af4 | 356 | struct ap_queue *aq = (struct ap_queue *) data; |
3f3007af MS |
357 | |
358 | if (ap_suspend_flag) | |
359 | return; | |
e28d2af4 IT |
360 | spin_lock_bh(&aq->lock); |
361 | ap_wait(ap_sm_event(aq, AP_EVENT_TIMEOUT)); | |
362 | spin_unlock_bh(&aq->lock); | |
3f3007af MS |
363 | } |
364 | ||
365 | /** | |
366 | * ap_poll_timeout(): AP receive polling for finished AP requests. | |
367 | * @unused: Unused pointer. | |
368 | * | |
369 | * Schedules the AP tasklet using a high resolution timer. | |
370 | */ | |
371 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) | |
372 | { | |
373 | if (!ap_suspend_flag) | |
374 | tasklet_schedule(&ap_tasklet); | |
375 | return HRTIMER_NORESTART; | |
376 | } | |
377 | ||
378 | /** | |
379 | * ap_interrupt_handler() - Schedule ap_tasklet on interrupt | |
380 | * @airq: pointer to adapter interrupt descriptor | |
381 | */ | |
382 | static void ap_interrupt_handler(struct airq_struct *airq) | |
383 | { | |
384 | inc_irq_stat(IRQIO_APB); | |
385 | if (!ap_suspend_flag) | |
386 | tasklet_schedule(&ap_tasklet); | |
387 | } | |
388 | ||
389 | /** | |
390 | * ap_tasklet_fn(): Tasklet to poll all AP devices. | |
391 | * @dummy: Unused variable | |
392 | * | |
393 | * Poll all AP devices on the bus. | |
394 | */ | |
395 | static void ap_tasklet_fn(unsigned long dummy) | |
396 | { | |
e28d2af4 IT |
397 | struct ap_card *ac; |
398 | struct ap_queue *aq; | |
3f3007af MS |
399 | enum ap_wait wait = AP_WAIT_NONE; |
400 | ||
401 | /* Reset the indicator if interrupts are used. Thus new interrupts can | |
402 | * be received. Doing it in the beginning of the tasklet is therefor | |
403 | * important that no requests on any AP get lost. | |
404 | */ | |
405 | if (ap_using_interrupts()) | |
406 | xchg(ap_airq.lsi_ptr, 0); | |
407 | ||
e28d2af4 IT |
408 | spin_lock_bh(&ap_list_lock); |
409 | for_each_ap_card(ac) { | |
410 | for_each_ap_queue(aq, ac) { | |
411 | spin_lock_bh(&aq->lock); | |
412 | wait = min(wait, ap_sm_event_loop(aq, AP_EVENT_POLL)); | |
413 | spin_unlock_bh(&aq->lock); | |
414 | } | |
3f3007af | 415 | } |
e28d2af4 IT |
416 | spin_unlock_bh(&ap_list_lock); |
417 | ||
418 | ap_wait(wait); | |
af512ed0 RW |
419 | } |
420 | ||
9af3e04e MS |
421 | static int ap_pending_requests(void) |
422 | { | |
e28d2af4 IT |
423 | struct ap_card *ac; |
424 | struct ap_queue *aq; | |
425 | ||
426 | spin_lock_bh(&ap_list_lock); | |
427 | for_each_ap_card(ac) { | |
428 | for_each_ap_queue(aq, ac) { | |
429 | if (aq->queue_count == 0) | |
430 | continue; | |
431 | spin_unlock_bh(&ap_list_lock); | |
432 | return 1; | |
9af3e04e | 433 | } |
9af3e04e | 434 | } |
e28d2af4 IT |
435 | spin_unlock_bh(&ap_list_lock); |
436 | return 0; | |
9af3e04e MS |
437 | } |
438 | ||
83e9d5d2 MS |
439 | /** |
440 | * ap_poll_thread(): Thread that polls for finished requests. | |
441 | * @data: Unused pointer | |
442 | * | |
443 | * AP bus poll thread. The purpose of this thread is to poll for | |
444 | * finished requests in a loop if there is a "free" cpu - that is | |
445 | * a cpu that doesn't have anything better to do. The polling stops | |
446 | * as soon as there is another task or if all messages have been | |
447 | * delivered. | |
448 | */ | |
449 | static int ap_poll_thread(void *data) | |
450 | { | |
451 | DECLARE_WAITQUEUE(wait, current); | |
83e9d5d2 MS |
452 | |
453 | set_user_nice(current, MAX_NICE); | |
454 | set_freezable(); | |
455 | while (!kthread_should_stop()) { | |
456 | add_wait_queue(&ap_poll_wait, &wait); | |
457 | set_current_state(TASK_INTERRUPTIBLE); | |
9af3e04e | 458 | if (ap_suspend_flag || !ap_pending_requests()) { |
83e9d5d2 MS |
459 | schedule(); |
460 | try_to_freeze(); | |
461 | } | |
462 | set_current_state(TASK_RUNNING); | |
463 | remove_wait_queue(&ap_poll_wait, &wait); | |
83e9d5d2 MS |
464 | if (need_resched()) { |
465 | schedule(); | |
466 | try_to_freeze(); | |
467 | continue; | |
468 | } | |
3f3007af | 469 | ap_tasklet_fn(0); |
9af3e04e MS |
470 | } |
471 | ||
83e9d5d2 MS |
472 | return 0; |
473 | } | |
474 | ||
475 | static int ap_poll_thread_start(void) | |
476 | { | |
477 | int rc; | |
478 | ||
479 | if (ap_using_interrupts() || ap_poll_kthread) | |
480 | return 0; | |
481 | mutex_lock(&ap_poll_thread_mutex); | |
482 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
483 | rc = PTR_RET(ap_poll_kthread); | |
484 | if (rc) | |
485 | ap_poll_kthread = NULL; | |
486 | mutex_unlock(&ap_poll_thread_mutex); | |
487 | return rc; | |
488 | } | |
489 | ||
490 | static void ap_poll_thread_stop(void) | |
491 | { | |
492 | if (!ap_poll_kthread) | |
493 | return; | |
494 | mutex_lock(&ap_poll_thread_mutex); | |
495 | kthread_stop(ap_poll_kthread); | |
496 | ap_poll_kthread = NULL; | |
497 | mutex_unlock(&ap_poll_thread_mutex); | |
498 | } | |
499 | ||
e28d2af4 IT |
500 | #define is_card_dev(x) ((x)->parent == ap_root_device) |
501 | #define is_queue_dev(x) ((x)->parent != ap_root_device) | |
1534c382 MS |
502 | |
503 | /** | |
1749a81d FB |
504 | * ap_bus_match() |
505 | * @dev: Pointer to device | |
506 | * @drv: Pointer to device_driver | |
507 | * | |
1534c382 MS |
508 | * AP bus driver registration/unregistration. |
509 | */ | |
510 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
511 | { | |
1534c382 MS |
512 | struct ap_driver *ap_drv = to_ap_drv(drv); |
513 | struct ap_device_id *id; | |
514 | ||
1749a81d | 515 | /* |
1534c382 MS |
516 | * Compare device type of the device with the list of |
517 | * supported types of the device_driver. | |
518 | */ | |
519 | for (id = ap_drv->ids; id->match_flags; id++) { | |
e28d2af4 IT |
520 | if (is_card_dev(dev) && |
521 | id->match_flags & AP_DEVICE_ID_MATCH_CARD_TYPE && | |
522 | id->dev_type == to_ap_dev(dev)->device_type) | |
523 | return 1; | |
524 | if (is_queue_dev(dev) && | |
525 | id->match_flags & AP_DEVICE_ID_MATCH_QUEUE_TYPE && | |
526 | id->dev_type == to_ap_dev(dev)->device_type) | |
527 | return 1; | |
1534c382 MS |
528 | } |
529 | return 0; | |
530 | } | |
531 | ||
532 | /** | |
1749a81d FB |
533 | * ap_uevent(): Uevent function for AP devices. |
534 | * @dev: Pointer to device | |
535 | * @env: Pointer to kobj_uevent_env | |
536 | * | |
537 | * It sets up a single environment variable DEV_TYPE which contains the | |
538 | * hardware device type. | |
1534c382 | 539 | */ |
7eff2e7a | 540 | static int ap_uevent (struct device *dev, struct kobj_uevent_env *env) |
1534c382 MS |
541 | { |
542 | struct ap_device *ap_dev = to_ap_dev(dev); | |
7eff2e7a | 543 | int retval = 0; |
1534c382 MS |
544 | |
545 | if (!ap_dev) | |
546 | return -ENODEV; | |
547 | ||
548 | /* Set up DEV_TYPE environment variable. */ | |
7eff2e7a | 549 | retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); |
bf62456e ER |
550 | if (retval) |
551 | return retval; | |
552 | ||
66a4263b | 553 | /* Add MODALIAS= */ |
7eff2e7a | 554 | retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); |
bf62456e | 555 | |
bf62456e | 556 | return retval; |
1534c382 MS |
557 | } |
558 | ||
3e488c95 | 559 | static int ap_dev_suspend(struct device *dev) |
772f5472 FB |
560 | { |
561 | struct ap_device *ap_dev = to_ap_dev(dev); | |
772f5472 | 562 | |
e28d2af4 IT |
563 | if (ap_dev->drv && ap_dev->drv->suspend) |
564 | ap_dev->drv->suspend(ap_dev); | |
565 | return 0; | |
566 | } | |
567 | ||
568 | static int ap_dev_resume(struct device *dev) | |
569 | { | |
570 | struct ap_device *ap_dev = to_ap_dev(dev); | |
571 | ||
572 | if (ap_dev->drv && ap_dev->drv->resume) | |
573 | ap_dev->drv->resume(ap_dev); | |
83e9d5d2 MS |
574 | return 0; |
575 | } | |
5314af69 | 576 | |
83e9d5d2 MS |
577 | static void ap_bus_suspend(void) |
578 | { | |
cccd85bf HF |
579 | AP_DBF(DBF_DEBUG, "ap_bus_suspend running\n"); |
580 | ||
83e9d5d2 MS |
581 | ap_suspend_flag = 1; |
582 | /* | |
583 | * Disable scanning for devices, thus we do not want to scan | |
584 | * for them after removing. | |
585 | */ | |
8139b89d | 586 | flush_work(&ap_scan_work); |
83e9d5d2 MS |
587 | tasklet_disable(&ap_tasklet); |
588 | } | |
589 | ||
e28d2af4 IT |
590 | static int __ap_card_devices_unregister(struct device *dev, void *dummy) |
591 | { | |
592 | if (is_card_dev(dev)) | |
593 | device_unregister(dev); | |
594 | return 0; | |
595 | } | |
596 | ||
597 | static int __ap_queue_devices_unregister(struct device *dev, void *dummy) | |
598 | { | |
599 | if (is_queue_dev(dev)) | |
600 | device_unregister(dev); | |
601 | return 0; | |
602 | } | |
603 | ||
604 | static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data) | |
83e9d5d2 | 605 | { |
e28d2af4 IT |
606 | if (is_queue_dev(dev) && |
607 | AP_QID_CARD(to_ap_queue(dev)->qid) == (int)(long) data) | |
608 | device_unregister(dev); | |
83e9d5d2 MS |
609 | return 0; |
610 | } | |
611 | ||
612 | static void ap_bus_resume(void) | |
772f5472 | 613 | { |
f4eae94f | 614 | int rc; |
772f5472 | 615 | |
cccd85bf HF |
616 | AP_DBF(DBF_DEBUG, "ap_bus_resume running\n"); |
617 | ||
e28d2af4 IT |
618 | /* remove all queue devices */ |
619 | bus_for_each_dev(&ap_bus_type, NULL, NULL, | |
620 | __ap_queue_devices_unregister); | |
621 | /* remove all card devices */ | |
622 | bus_for_each_dev(&ap_bus_type, NULL, NULL, | |
623 | __ap_card_devices_unregister); | |
624 | ||
83e9d5d2 MS |
625 | /* Reset thin interrupt setting */ |
626 | if (ap_interrupts_available() && !ap_using_interrupts()) { | |
627 | rc = register_adapter_interrupt(&ap_airq); | |
628 | ap_airq_flag = (rc == 0); | |
5314af69 | 629 | } |
83e9d5d2 MS |
630 | if (!ap_interrupts_available() && ap_using_interrupts()) { |
631 | unregister_adapter_interrupt(&ap_airq); | |
632 | ap_airq_flag = 0; | |
633 | } | |
634 | /* Reset domain */ | |
635 | if (!user_set_domain) | |
636 | ap_domain_index = -1; | |
637 | /* Get things going again */ | |
638 | ap_suspend_flag = 0; | |
639 | if (ap_airq_flag) | |
640 | xchg(ap_airq.lsi_ptr, 0); | |
641 | tasklet_enable(&ap_tasklet); | |
8139b89d | 642 | queue_work(system_long_wq, &ap_scan_work); |
83e9d5d2 | 643 | } |
772f5472 | 644 | |
83e9d5d2 MS |
645 | static int ap_power_event(struct notifier_block *this, unsigned long event, |
646 | void *ptr) | |
647 | { | |
648 | switch (event) { | |
649 | case PM_HIBERNATION_PREPARE: | |
650 | case PM_SUSPEND_PREPARE: | |
651 | ap_bus_suspend(); | |
652 | break; | |
653 | case PM_POST_HIBERNATION: | |
654 | case PM_POST_SUSPEND: | |
655 | ap_bus_resume(); | |
656 | break; | |
657 | default: | |
658 | break; | |
659 | } | |
660 | return NOTIFY_DONE; | |
772f5472 | 661 | } |
83e9d5d2 MS |
662 | static struct notifier_block ap_power_notifier = { |
663 | .notifier_call = ap_power_event, | |
664 | }; | |
772f5472 | 665 | |
e28d2af4 | 666 | static SIMPLE_DEV_PM_OPS(ap_bus_pm_ops, ap_dev_suspend, ap_dev_resume); |
3e488c95 | 667 | |
1534c382 MS |
668 | static struct bus_type ap_bus_type = { |
669 | .name = "ap", | |
670 | .match = &ap_bus_match, | |
671 | .uevent = &ap_uevent, | |
3e488c95 | 672 | .pm = &ap_bus_pm_ops, |
1534c382 MS |
673 | }; |
674 | ||
675 | static int ap_device_probe(struct device *dev) | |
676 | { | |
677 | struct ap_device *ap_dev = to_ap_dev(dev); | |
3f3007af MS |
678 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
679 | int rc; | |
666e68e0 | 680 | |
3f3007af | 681 | ap_dev->drv = ap_drv; |
1534c382 | 682 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
3f3007af MS |
683 | if (rc) |
684 | ap_dev->drv = NULL; | |
1534c382 MS |
685 | return rc; |
686 | } | |
687 | ||
1534c382 MS |
688 | static int ap_device_remove(struct device *dev) |
689 | { | |
690 | struct ap_device *ap_dev = to_ap_dev(dev); | |
691 | struct ap_driver *ap_drv = ap_dev->drv; | |
692 | ||
e28d2af4 IT |
693 | spin_lock_bh(&ap_list_lock); |
694 | if (is_card_dev(dev)) | |
695 | list_del_init(&to_ap_card(dev)->list); | |
696 | else | |
697 | list_del_init(&to_ap_queue(dev)->list); | |
698 | spin_unlock_bh(&ap_list_lock); | |
faa582ca RW |
699 | if (ap_drv->remove) |
700 | ap_drv->remove(ap_dev); | |
1534c382 MS |
701 | return 0; |
702 | } | |
703 | ||
704 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, | |
705 | char *name) | |
706 | { | |
707 | struct device_driver *drv = &ap_drv->driver; | |
708 | ||
e387753c SS |
709 | if (!initialised) |
710 | return -ENODEV; | |
711 | ||
1534c382 MS |
712 | drv->bus = &ap_bus_type; |
713 | drv->probe = ap_device_probe; | |
714 | drv->remove = ap_device_remove; | |
715 | drv->owner = owner; | |
716 | drv->name = name; | |
717 | return driver_register(drv); | |
718 | } | |
719 | EXPORT_SYMBOL(ap_driver_register); | |
720 | ||
721 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
722 | { | |
723 | driver_unregister(&ap_drv->driver); | |
724 | } | |
725 | EXPORT_SYMBOL(ap_driver_unregister); | |
726 | ||
dabecb29 HD |
727 | void ap_bus_force_rescan(void) |
728 | { | |
83e9d5d2 MS |
729 | if (ap_suspend_flag) |
730 | return; | |
56bbe686 | 731 | /* processing a asynchronous bus rescan */ |
fcd0d1f6 | 732 | del_timer(&ap_config_timer); |
8139b89d MS |
733 | queue_work(system_long_wq, &ap_scan_work); |
734 | flush_work(&ap_scan_work); | |
dabecb29 HD |
735 | } |
736 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
737 | ||
1749a81d | 738 | /* |
1534c382 MS |
739 | * AP bus attributes. |
740 | */ | |
741 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) | |
742 | { | |
743 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); | |
744 | } | |
745 | ||
fc1d3f02 IT |
746 | static ssize_t ap_domain_store(struct bus_type *bus, |
747 | const char *buf, size_t count) | |
748 | { | |
749 | int domain; | |
750 | ||
751 | if (sscanf(buf, "%i\n", &domain) != 1 || | |
752 | domain < 0 || domain > ap_max_domain_id) | |
753 | return -EINVAL; | |
754 | spin_lock_bh(&ap_domain_lock); | |
755 | ap_domain_index = domain; | |
756 | spin_unlock_bh(&ap_domain_lock); | |
cccd85bf HF |
757 | |
758 | AP_DBF(DBF_DEBUG, "store new default domain=%d\n", domain); | |
759 | ||
fc1d3f02 IT |
760 | return count; |
761 | } | |
762 | ||
763 | static BUS_ATTR(ap_domain, 0644, ap_domain_show, ap_domain_store); | |
1534c382 | 764 | |
91f3e3ea IT |
765 | static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf) |
766 | { | |
889875a1 MS |
767 | if (!ap_configuration) /* QCI not supported */ |
768 | return snprintf(buf, PAGE_SIZE, "not supported\n"); | |
e28d2af4 | 769 | |
889875a1 MS |
770 | return snprintf(buf, PAGE_SIZE, |
771 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
91f3e3ea IT |
772 | ap_configuration->adm[0], ap_configuration->adm[1], |
773 | ap_configuration->adm[2], ap_configuration->adm[3], | |
774 | ap_configuration->adm[4], ap_configuration->adm[5], | |
775 | ap_configuration->adm[6], ap_configuration->adm[7]); | |
91f3e3ea IT |
776 | } |
777 | ||
778 | static BUS_ATTR(ap_control_domain_mask, 0444, | |
779 | ap_control_domain_mask_show, NULL); | |
780 | ||
e28d2af4 IT |
781 | static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf) |
782 | { | |
783 | if (!ap_configuration) /* QCI not supported */ | |
784 | return snprintf(buf, PAGE_SIZE, "not supported\n"); | |
785 | ||
786 | return snprintf(buf, PAGE_SIZE, | |
787 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
788 | ap_configuration->aqm[0], ap_configuration->aqm[1], | |
789 | ap_configuration->aqm[2], ap_configuration->aqm[3], | |
790 | ap_configuration->aqm[4], ap_configuration->aqm[5], | |
791 | ap_configuration->aqm[6], ap_configuration->aqm[7]); | |
792 | } | |
793 | ||
794 | static BUS_ATTR(ap_usage_domain_mask, 0444, | |
795 | ap_usage_domain_mask_show, NULL); | |
796 | ||
1534c382 MS |
797 | static ssize_t ap_config_time_show(struct bus_type *bus, char *buf) |
798 | { | |
799 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); | |
800 | } | |
801 | ||
cb17a636 FB |
802 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
803 | { | |
804 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
805 | ap_using_interrupts() ? 1 : 0); | |
806 | } | |
807 | ||
808 | static BUS_ATTR(ap_interrupts, 0444, ap_interrupts_show, NULL); | |
809 | ||
1534c382 MS |
810 | static ssize_t ap_config_time_store(struct bus_type *bus, |
811 | const char *buf, size_t count) | |
812 | { | |
813 | int time; | |
814 | ||
815 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
816 | return -EINVAL; | |
817 | ap_config_time = time; | |
fcd0d1f6 | 818 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); |
1534c382 MS |
819 | return count; |
820 | } | |
821 | ||
822 | static BUS_ATTR(config_time, 0644, ap_config_time_show, ap_config_time_store); | |
823 | ||
824 | static ssize_t ap_poll_thread_show(struct bus_type *bus, char *buf) | |
825 | { | |
826 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); | |
827 | } | |
828 | ||
829 | static ssize_t ap_poll_thread_store(struct bus_type *bus, | |
830 | const char *buf, size_t count) | |
831 | { | |
832 | int flag, rc; | |
833 | ||
834 | if (sscanf(buf, "%d\n", &flag) != 1) | |
835 | return -EINVAL; | |
836 | if (flag) { | |
837 | rc = ap_poll_thread_start(); | |
838 | if (rc) | |
83e9d5d2 MS |
839 | count = rc; |
840 | } else | |
1534c382 MS |
841 | ap_poll_thread_stop(); |
842 | return count; | |
843 | } | |
844 | ||
845 | static BUS_ATTR(poll_thread, 0644, ap_poll_thread_show, ap_poll_thread_store); | |
846 | ||
fe137230 FB |
847 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
848 | { | |
849 | return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); | |
850 | } | |
851 | ||
852 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
853 | size_t count) | |
854 | { | |
855 | unsigned long long time; | |
856 | ktime_t hr_time; | |
857 | ||
858 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
859 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
860 | time > 120000000000ULL) | |
fe137230 FB |
861 | return -EINVAL; |
862 | poll_timeout = time; | |
8b0e1953 | 863 | hr_time = poll_timeout; |
fe137230 | 864 | |
8cc2af7c IT |
865 | spin_lock_bh(&ap_poll_timer_lock); |
866 | hrtimer_cancel(&ap_poll_timer); | |
867 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
868 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
869 | spin_unlock_bh(&ap_poll_timer_lock); | |
870 | ||
fe137230 FB |
871 | return count; |
872 | } | |
873 | ||
874 | static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store); | |
875 | ||
5bc334bf IT |
876 | static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf) |
877 | { | |
889875a1 MS |
878 | int max_domain_id; |
879 | ||
880 | if (ap_configuration) | |
881 | max_domain_id = ap_max_domain_id ? : -1; | |
882 | else | |
5bc334bf | 883 | max_domain_id = 15; |
5bc334bf IT |
884 | return snprintf(buf, PAGE_SIZE, "%d\n", max_domain_id); |
885 | } | |
886 | ||
887 | static BUS_ATTR(ap_max_domain_id, 0444, ap_max_domain_id_show, NULL); | |
888 | ||
1534c382 MS |
889 | static struct bus_attribute *const ap_bus_attrs[] = { |
890 | &bus_attr_ap_domain, | |
91f3e3ea | 891 | &bus_attr_ap_control_domain_mask, |
e28d2af4 | 892 | &bus_attr_ap_usage_domain_mask, |
1534c382 MS |
893 | &bus_attr_config_time, |
894 | &bus_attr_poll_thread, | |
cb17a636 | 895 | &bus_attr_ap_interrupts, |
fe137230 | 896 | &bus_attr_poll_timeout, |
5bc334bf | 897 | &bus_attr_ap_max_domain_id, |
fe137230 | 898 | NULL, |
1534c382 MS |
899 | }; |
900 | ||
901 | /** | |
1749a81d FB |
902 | * ap_select_domain(): Select an AP domain. |
903 | * | |
904 | * Pick one of the 16 AP domains. | |
1534c382 | 905 | */ |
4d284cac | 906 | static int ap_select_domain(void) |
1534c382 | 907 | { |
6acbe21f MS |
908 | int count, max_count, best_domain; |
909 | struct ap_queue_status status; | |
910 | int i, j; | |
1534c382 | 911 | |
1749a81d | 912 | /* |
1534c382 MS |
913 | * We want to use a single domain. Either the one specified with |
914 | * the "domain=" parameter or the domain with the maximum number | |
915 | * of devices. | |
916 | */ | |
fc1d3f02 IT |
917 | spin_lock_bh(&ap_domain_lock); |
918 | if (ap_domain_index >= 0) { | |
1534c382 | 919 | /* Domain has already been selected. */ |
fc1d3f02 | 920 | spin_unlock_bh(&ap_domain_lock); |
1534c382 | 921 | return 0; |
fc1d3f02 | 922 | } |
1534c382 MS |
923 | best_domain = -1; |
924 | max_count = 0; | |
925 | for (i = 0; i < AP_DOMAINS; i++) { | |
75014550 HD |
926 | if (!ap_test_config_domain(i)) |
927 | continue; | |
1534c382 MS |
928 | count = 0; |
929 | for (j = 0; j < AP_DEVICES; j++) { | |
75014550 HD |
930 | if (!ap_test_config_card_id(j)) |
931 | continue; | |
6acbe21f MS |
932 | status = ap_test_queue(AP_MKQID(j, i), NULL); |
933 | if (status.response_code != AP_RESPONSE_NORMAL) | |
1534c382 MS |
934 | continue; |
935 | count++; | |
936 | } | |
937 | if (count > max_count) { | |
938 | max_count = count; | |
939 | best_domain = i; | |
940 | } | |
941 | } | |
942 | if (best_domain >= 0){ | |
943 | ap_domain_index = best_domain; | |
fc1d3f02 | 944 | spin_unlock_bh(&ap_domain_lock); |
1534c382 MS |
945 | return 0; |
946 | } | |
fc1d3f02 | 947 | spin_unlock_bh(&ap_domain_lock); |
1534c382 MS |
948 | return -ENODEV; |
949 | } | |
950 | ||
e28d2af4 IT |
951 | /* |
952 | * helper function to be used with bus_find_dev | |
953 | * matches for the card device with the given id | |
1534c382 | 954 | */ |
e28d2af4 | 955 | static int __match_card_device_with_id(struct device *dev, void *data) |
1534c382 | 956 | { |
e28d2af4 | 957 | return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long) data; |
1534c382 MS |
958 | } |
959 | ||
e28d2af4 IT |
960 | /* helper function to be used with bus_find_dev |
961 | * matches for the queue device with a given qid | |
962 | */ | |
963 | static int __match_queue_device_with_qid(struct device *dev, void *data) | |
964 | { | |
965 | return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long) data; | |
966 | } | |
967 | ||
968 | /** | |
969 | * ap_scan_bus(): Scan the AP bus for new devices | |
970 | * Runs periodically, workqueue timer (ap_config_time) | |
971 | */ | |
4927b3f7 | 972 | static void ap_scan_bus(struct work_struct *unused) |
1534c382 | 973 | { |
e28d2af4 IT |
974 | struct ap_queue *aq; |
975 | struct ap_card *ac; | |
1534c382 MS |
976 | struct device *dev; |
977 | ap_qid_t qid; | |
e28d2af4 IT |
978 | int depth = 0, type = 0; |
979 | unsigned int functions = 0; | |
980 | int rc, id, dom, borked, domains; | |
1534c382 | 981 | |
cccd85bf HF |
982 | AP_DBF(DBF_DEBUG, "ap_scan_bus running\n"); |
983 | ||
75014550 | 984 | ap_query_configuration(); |
83e9d5d2 | 985 | if (ap_select_domain() != 0) |
fcd0d1f6 | 986 | goto out; |
889875a1 | 987 | |
e28d2af4 IT |
988 | for (id = 0; id < AP_DEVICES; id++) { |
989 | /* check if device is registered */ | |
1534c382 | 990 | dev = bus_find_device(&ap_bus_type, NULL, |
e28d2af4 IT |
991 | (void *)(long) id, |
992 | __match_card_device_with_id); | |
993 | ac = dev ? to_ap_card(dev) : NULL; | |
994 | if (!ap_test_config_card_id(id)) { | |
995 | if (dev) { | |
996 | /* Card device has been removed from | |
997 | * configuration, remove the belonging | |
998 | * queue devices. | |
999 | */ | |
1000 | bus_for_each_dev(&ap_bus_type, NULL, | |
1001 | (void *)(long) id, | |
1002 | __ap_queue_devices_with_id_unregister); | |
1003 | /* now remove the card device */ | |
3f3007af | 1004 | device_unregister(dev); |
e28d2af4 IT |
1005 | put_device(dev); |
1006 | } | |
1534c382 MS |
1007 | continue; |
1008 | } | |
e28d2af4 IT |
1009 | /* According to the configuration there should be a card |
1010 | * device, so check if there is at least one valid queue | |
1011 | * and maybe create queue devices and the card device. | |
1012 | */ | |
1013 | domains = 0; | |
1014 | for (dom = 0; dom < AP_DOMAINS; dom++) { | |
1015 | qid = AP_MKQID(id, dom); | |
1016 | dev = bus_find_device(&ap_bus_type, NULL, | |
1017 | (void *)(long) qid, | |
1018 | __match_queue_device_with_qid); | |
1019 | aq = dev ? to_ap_queue(dev) : NULL; | |
1020 | if (!ap_test_config_domain(dom)) { | |
1021 | if (dev) { | |
1022 | /* Queue device exists but has been | |
1023 | * removed from configuration. | |
1024 | */ | |
1025 | device_unregister(dev); | |
1026 | put_device(dev); | |
1027 | } | |
1028 | continue; | |
1029 | } | |
1030 | rc = ap_query_queue(qid, &depth, &type, &functions); | |
1031 | if (dev) { | |
1032 | spin_lock_bh(&aq->lock); | |
1033 | if (rc == -ENODEV || | |
1034 | /* adapter reconfiguration */ | |
1035 | (ac && ac->functions != functions)) | |
1036 | aq->state = AP_STATE_BORKED; | |
1037 | borked = aq->state == AP_STATE_BORKED; | |
1038 | spin_unlock_bh(&aq->lock); | |
1039 | if (borked) /* Remove broken device */ | |
1040 | device_unregister(dev); | |
1041 | put_device(dev); | |
1042 | if (!borked) { | |
1043 | domains++; | |
1044 | continue; | |
1045 | } | |
1046 | } | |
1047 | if (rc) | |
1048 | continue; | |
1049 | /* new queue device needed */ | |
1050 | if (!ac) { | |
1051 | /* but first create the card device */ | |
1052 | ac = ap_card_create(id, depth, | |
1053 | type, functions); | |
1054 | if (!ac) | |
1055 | continue; | |
1056 | ac->ap_dev.device.bus = &ap_bus_type; | |
1057 | ac->ap_dev.device.parent = ap_root_device; | |
1058 | dev_set_name(&ac->ap_dev.device, | |
1059 | "card%02x", id); | |
1060 | /* Register card with AP bus */ | |
1061 | rc = device_register(&ac->ap_dev.device); | |
1062 | if (rc) { | |
1063 | put_device(&ac->ap_dev.device); | |
1064 | ac = NULL; | |
1065 | break; | |
1066 | } | |
1067 | /* get it and thus adjust reference counter */ | |
1068 | get_device(&ac->ap_dev.device); | |
1069 | /* Add card device to card list */ | |
1070 | spin_lock_bh(&ap_list_lock); | |
1071 | list_add(&ac->list, &ap_card_list); | |
1072 | spin_unlock_bh(&ap_list_lock); | |
1073 | } | |
1074 | /* now create the new queue device */ | |
1075 | aq = ap_queue_create(qid, type); | |
1076 | if (!aq) | |
1077 | continue; | |
1078 | aq->card = ac; | |
1079 | aq->ap_dev.device.bus = &ap_bus_type; | |
1080 | aq->ap_dev.device.parent = &ac->ap_dev.device; | |
1081 | dev_set_name(&aq->ap_dev.device, | |
1082 | "%02x.%04x", id, dom); | |
1083 | /* Add queue device to card queue list */ | |
1084 | spin_lock_bh(&ap_list_lock); | |
1085 | list_add(&aq->list, &ac->queues); | |
1086 | spin_unlock_bh(&ap_list_lock); | |
1087 | /* Start with a device reset */ | |
1088 | spin_lock_bh(&aq->lock); | |
1089 | ap_wait(ap_sm_event(aq, AP_EVENT_POLL)); | |
1090 | spin_unlock_bh(&aq->lock); | |
1091 | /* Register device */ | |
1092 | rc = device_register(&aq->ap_dev.device); | |
1093 | if (rc) { | |
1094 | spin_lock_bh(&ap_list_lock); | |
1095 | list_del_init(&aq->list); | |
1096 | spin_unlock_bh(&ap_list_lock); | |
1097 | put_device(&aq->ap_dev.device); | |
1098 | continue; | |
1099 | } | |
1100 | domains++; | |
1101 | } /* end domain loop */ | |
1102 | if (ac) { | |
1103 | /* remove card dev if there are no queue devices */ | |
1104 | if (!domains) | |
1105 | device_unregister(&ac->ap_dev.device); | |
1106 | put_device(&ac->ap_dev.device); | |
3f3007af | 1107 | } |
e28d2af4 | 1108 | } /* end device loop */ |
fcd0d1f6 MS |
1109 | out: |
1110 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); | |
1534c382 MS |
1111 | } |
1112 | ||
83e9d5d2 | 1113 | static void ap_config_timeout(unsigned long ptr) |
1534c382 | 1114 | { |
83e9d5d2 MS |
1115 | if (ap_suspend_flag) |
1116 | return; | |
8139b89d | 1117 | queue_work(system_long_wq, &ap_scan_work); |
1534c382 MS |
1118 | } |
1119 | ||
13e742ba RW |
1120 | static void ap_reset_domain(void) |
1121 | { | |
1122 | int i; | |
1123 | ||
889875a1 MS |
1124 | if (ap_domain_index == -1 || !ap_test_config_domain(ap_domain_index)) |
1125 | return; | |
1126 | for (i = 0; i < AP_DEVICES; i++) | |
0db78559 | 1127 | ap_rapq(AP_MKQID(i, ap_domain_index)); |
13e742ba RW |
1128 | } |
1129 | ||
1130 | static void ap_reset_all(void) | |
85eca850 RW |
1131 | { |
1132 | int i, j; | |
1133 | ||
170387a8 IT |
1134 | for (i = 0; i < AP_DOMAINS; i++) { |
1135 | if (!ap_test_config_domain(i)) | |
1136 | continue; | |
1137 | for (j = 0; j < AP_DEVICES; j++) { | |
1138 | if (!ap_test_config_card_id(j)) | |
1139 | continue; | |
0db78559 | 1140 | ap_rapq(AP_MKQID(j, i)); |
170387a8 IT |
1141 | } |
1142 | } | |
85eca850 RW |
1143 | } |
1144 | ||
1145 | static struct reset_call ap_reset_call = { | |
13e742ba | 1146 | .fn = ap_reset_all, |
85eca850 RW |
1147 | }; |
1148 | ||
cccd85bf HF |
1149 | int __init ap_debug_init(void) |
1150 | { | |
1151 | ap_dbf_root = debugfs_create_dir("ap", NULL); | |
1152 | ap_dbf_info = debug_register("ap", 1, 1, | |
1153 | DBF_MAX_SPRINTF_ARGS * sizeof(long)); | |
1154 | debug_register_view(ap_dbf_info, &debug_sprintf_view); | |
1155 | debug_set_level(ap_dbf_info, DBF_ERR); | |
1156 | ||
1157 | return 0; | |
1158 | } | |
1159 | ||
1160 | void ap_debug_exit(void) | |
1161 | { | |
1162 | debugfs_remove(ap_dbf_root); | |
1163 | debug_unregister(ap_dbf_info); | |
1164 | } | |
1165 | ||
1534c382 | 1166 | /** |
1749a81d FB |
1167 | * ap_module_init(): The module initialization code. |
1168 | * | |
1169 | * Initializes the module. | |
1534c382 MS |
1170 | */ |
1171 | int __init ap_module_init(void) | |
1172 | { | |
889875a1 | 1173 | int max_domain_id; |
1534c382 MS |
1174 | int rc, i; |
1175 | ||
cccd85bf HF |
1176 | rc = ap_debug_init(); |
1177 | if (rc) | |
1178 | return rc; | |
1179 | ||
889875a1 MS |
1180 | if (ap_instructions_available() != 0) { |
1181 | pr_warn("The hardware system does not support AP instructions\n"); | |
1182 | return -ENODEV; | |
1183 | } | |
1184 | ||
1185 | /* Get AP configuration data if available */ | |
1186 | ap_init_configuration(); | |
1187 | ||
1188 | if (ap_configuration) | |
1189 | max_domain_id = ap_max_domain_id ? : (AP_DOMAINS - 1); | |
1190 | else | |
1191 | max_domain_id = 15; | |
1192 | if (ap_domain_index < -1 || ap_domain_index > max_domain_id) { | |
1193 | pr_warn("%d is not a valid cryptographic domain\n", | |
1194 | ap_domain_index); | |
33c388b8 WY |
1195 | rc = -EINVAL; |
1196 | goto out_free; | |
1534c382 | 1197 | } |
5314af69 FB |
1198 | /* In resume callback we need to know if the user had set the domain. |
1199 | * If so, we can not just reset it. | |
1200 | */ | |
1201 | if (ap_domain_index >= 0) | |
1202 | user_set_domain = 1; | |
1203 | ||
cb17a636 | 1204 | if (ap_interrupts_available()) { |
f4eae94f MS |
1205 | rc = register_adapter_interrupt(&ap_airq); |
1206 | ap_airq_flag = (rc == 0); | |
cb17a636 FB |
1207 | } |
1208 | ||
85eca850 | 1209 | register_reset_call(&ap_reset_call); |
1534c382 MS |
1210 | |
1211 | /* Create /sys/bus/ap. */ | |
1212 | rc = bus_register(&ap_bus_type); | |
1213 | if (rc) | |
1214 | goto out; | |
1215 | for (i = 0; ap_bus_attrs[i]; i++) { | |
1216 | rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]); | |
1217 | if (rc) | |
1218 | goto out_bus; | |
1219 | } | |
1220 | ||
1221 | /* Create /sys/devices/ap. */ | |
035da16f | 1222 | ap_root_device = root_device_register("ap"); |
ba8da213 | 1223 | rc = PTR_RET(ap_root_device); |
1534c382 MS |
1224 | if (rc) |
1225 | goto out_bus; | |
1226 | ||
1749a81d | 1227 | /* Setup the AP bus rescan timer. */ |
fcd0d1f6 | 1228 | setup_timer(&ap_config_timer, ap_config_timeout, 0); |
1534c382 | 1229 | |
3f3007af MS |
1230 | /* |
1231 | * Setup the high resultion poll timer. | |
fe137230 FB |
1232 | * If we are running under z/VM adjust polling to z/VM polling rate. |
1233 | */ | |
1234 | if (MACHINE_IS_VM) | |
1235 | poll_timeout = 1500000; | |
93521314 | 1236 | spin_lock_init(&ap_poll_timer_lock); |
fe137230 FB |
1237 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
1238 | ap_poll_timer.function = ap_poll_timeout; | |
1239 | ||
1534c382 MS |
1240 | /* Start the low priority AP bus poll thread. */ |
1241 | if (ap_thread_flag) { | |
1242 | rc = ap_poll_thread_start(); | |
1243 | if (rc) | |
1244 | goto out_work; | |
1245 | } | |
1246 | ||
83e9d5d2 MS |
1247 | rc = register_pm_notifier(&ap_power_notifier); |
1248 | if (rc) | |
1249 | goto out_pm; | |
1250 | ||
8139b89d | 1251 | queue_work(system_long_wq, &ap_scan_work); |
e387753c | 1252 | initialised = true; |
3f3007af | 1253 | |
1534c382 MS |
1254 | return 0; |
1255 | ||
83e9d5d2 MS |
1256 | out_pm: |
1257 | ap_poll_thread_stop(); | |
1534c382 | 1258 | out_work: |
fe137230 | 1259 | hrtimer_cancel(&ap_poll_timer); |
035da16f | 1260 | root_device_unregister(ap_root_device); |
1534c382 MS |
1261 | out_bus: |
1262 | while (i--) | |
1263 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
1264 | bus_unregister(&ap_bus_type); | |
1265 | out: | |
85eca850 | 1266 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
1267 | if (ap_using_interrupts()) |
1268 | unregister_adapter_interrupt(&ap_airq); | |
33c388b8 | 1269 | out_free: |
889875a1 | 1270 | kfree(ap_configuration); |
1534c382 MS |
1271 | return rc; |
1272 | } | |
1273 | ||
1534c382 | 1274 | /** |
1749a81d FB |
1275 | * ap_modules_exit(): The module termination code |
1276 | * | |
1277 | * Terminates the module. | |
1534c382 MS |
1278 | */ |
1279 | void ap_module_exit(void) | |
1280 | { | |
1281 | int i; | |
1534c382 | 1282 | |
e387753c | 1283 | initialised = false; |
13e742ba | 1284 | ap_reset_domain(); |
1534c382 MS |
1285 | ap_poll_thread_stop(); |
1286 | del_timer_sync(&ap_config_timer); | |
fe137230 | 1287 | hrtimer_cancel(&ap_poll_timer); |
13e742ba | 1288 | tasklet_kill(&ap_tasklet); |
e28d2af4 IT |
1289 | |
1290 | /* first remove queue devices */ | |
1291 | bus_for_each_dev(&ap_bus_type, NULL, NULL, | |
1292 | __ap_queue_devices_unregister); | |
1293 | /* now remove the card devices */ | |
1294 | bus_for_each_dev(&ap_bus_type, NULL, NULL, | |
1295 | __ap_card_devices_unregister); | |
1296 | ||
1297 | /* remove bus attributes */ | |
1534c382 MS |
1298 | for (i = 0; ap_bus_attrs[i]; i++) |
1299 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
83e9d5d2 | 1300 | unregister_pm_notifier(&ap_power_notifier); |
f60b8d44 | 1301 | root_device_unregister(ap_root_device); |
1534c382 | 1302 | bus_unregister(&ap_bus_type); |
889875a1 | 1303 | kfree(ap_configuration); |
85eca850 | 1304 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
1305 | if (ap_using_interrupts()) |
1306 | unregister_adapter_interrupt(&ap_airq); | |
cccd85bf HF |
1307 | |
1308 | ap_debug_exit(); | |
1534c382 MS |
1309 | } |
1310 | ||
1534c382 MS |
1311 | module_init(ap_module_init); |
1312 | module_exit(ap_module_exit); |