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812141a9 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1534c382 | 2 | /* |
75014550 | 3 | * Copyright IBM Corp. 2006, 2012 |
1534c382 MS |
4 | * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
6 | * Ralph Wuerthner <rwuerthn@de.ibm.com> | |
cb17a636 | 7 | * Felix Beck <felix.beck@de.ibm.com> |
6bed05bc | 8 | * Holger Dengler <hd@linux.vnet.ibm.com> |
1534c382 MS |
9 | * |
10 | * Adjunct processor bus. | |
1534c382 MS |
11 | */ |
12 | ||
136f7a1c MS |
13 | #define KMSG_COMPONENT "ap" |
14 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
15 | ||
62d146ff | 16 | #include <linux/kernel_stat.h> |
50a0d46c | 17 | #include <linux/moduleparam.h> |
1534c382 MS |
18 | #include <linux/init.h> |
19 | #include <linux/delay.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/workqueue.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
1534c382 MS |
24 | #include <linux/notifier.h> |
25 | #include <linux/kthread.h> | |
26 | #include <linux/mutex.h> | |
83e9d5d2 | 27 | #include <linux/suspend.h> |
85eca850 | 28 | #include <asm/reset.h> |
cb17a636 | 29 | #include <asm/airq.h> |
60063497 | 30 | #include <linux/atomic.h> |
cb17a636 | 31 | #include <asm/isc.h> |
fe137230 FB |
32 | #include <linux/hrtimer.h> |
33 | #include <linux/ktime.h> | |
a0616cde | 34 | #include <asm/facility.h> |
5d26a105 | 35 | #include <linux/crypto.h> |
e28d2af4 | 36 | #include <linux/mod_devicetable.h> |
cccd85bf | 37 | #include <linux/debugfs.h> |
3cb86ad0 | 38 | #include <linux/ctype.h> |
1534c382 MS |
39 | |
40 | #include "ap_bus.h" | |
cccd85bf | 41 | #include "ap_debug.h" |
1534c382 | 42 | |
1749a81d | 43 | /* |
50a0d46c | 44 | * Module parameters; note though this file itself isn't modular. |
1534c382 MS |
45 | */ |
46 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ | |
fc1d3f02 | 47 | static DEFINE_SPINLOCK(ap_domain_lock); |
cf65c71d | 48 | module_param_named(domain, ap_domain_index, int, 0440); |
1534c382 MS |
49 | MODULE_PARM_DESC(domain, "domain index for ap devices"); |
50 | EXPORT_SYMBOL(ap_domain_index); | |
51 | ||
cf65c71d HF |
52 | static int ap_thread_flag; |
53 | module_param_named(poll_thread, ap_thread_flag, int, 0440); | |
b90b34c6 | 54 | MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)."); |
1534c382 | 55 | |
3cb86ad0 HF |
56 | static char *apm_str; |
57 | module_param_named(apmask, apm_str, charp, 0440); | |
58 | MODULE_PARM_DESC(apmask, "AP bus adapter mask."); | |
59 | ||
60 | static char *aqm_str; | |
61 | module_param_named(aqmask, aqm_str, charp, 0440); | |
62 | MODULE_PARM_DESC(aqmask, "AP bus domain mask."); | |
63 | ||
e28d2af4 IT |
64 | static struct device *ap_root_device; |
65 | ||
66 | DEFINE_SPINLOCK(ap_list_lock); | |
67 | LIST_HEAD(ap_card_list); | |
68 | ||
3cb86ad0 HF |
69 | /* Default permissions (card and domain masking) */ |
70 | static struct ap_perms { | |
71 | DECLARE_BITMAP(apm, AP_DEVICES); | |
72 | DECLARE_BITMAP(aqm, AP_DOMAINS); | |
73 | } ap_perms; | |
74 | static DEFINE_MUTEX(ap_perms_mutex); | |
75 | ||
75014550 | 76 | static struct ap_config_info *ap_configuration; |
e387753c | 77 | static bool initialised; |
1534c382 | 78 | |
cccd85bf HF |
79 | /* |
80 | * AP bus related debug feature things. | |
81 | */ | |
cccd85bf HF |
82 | debug_info_t *ap_dbf_info; |
83 | ||
1749a81d | 84 | /* |
8139b89d | 85 | * Workqueue timer for bus rescan. |
1534c382 | 86 | */ |
1534c382 MS |
87 | static struct timer_list ap_config_timer; |
88 | static int ap_config_time = AP_CONFIG_TIME; | |
3f3007af | 89 | static void ap_scan_bus(struct work_struct *); |
8139b89d | 90 | static DECLARE_WORK(ap_scan_work, ap_scan_bus); |
1534c382 | 91 | |
1749a81d | 92 | /* |
cb17a636 | 93 | * Tasklet & timer for AP request polling and interrupts |
1534c382 | 94 | */ |
3f3007af MS |
95 | static void ap_tasklet_fn(unsigned long); |
96 | static DECLARE_TASKLET(ap_tasklet, ap_tasklet_fn, 0); | |
1534c382 | 97 | static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait); |
cf65c71d | 98 | static struct task_struct *ap_poll_kthread; |
1534c382 | 99 | static DEFINE_MUTEX(ap_poll_thread_mutex); |
93521314 | 100 | static DEFINE_SPINLOCK(ap_poll_timer_lock); |
fe137230 | 101 | static struct hrtimer ap_poll_timer; |
cf65c71d HF |
102 | /* |
103 | * In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds. | |
104 | * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling. | |
105 | */ | |
fe137230 | 106 | static unsigned long long poll_timeout = 250000; |
1534c382 | 107 | |
772f5472 FB |
108 | /* Suspend flag */ |
109 | static int ap_suspend_flag; | |
889875a1 MS |
110 | /* Maximum domain id */ |
111 | static int ap_max_domain_id; | |
cf65c71d HF |
112 | /* |
113 | * Flag to check if domain was set through module parameter domain=. This is | |
5314af69 | 114 | * important when supsend and resume is done in a z/VM environment where the |
cf65c71d HF |
115 | * domain might change. |
116 | */ | |
117 | static int user_set_domain; | |
772f5472 FB |
118 | static struct bus_type ap_bus_type; |
119 | ||
f4eae94f | 120 | /* Adapter interrupt definitions */ |
3f3007af MS |
121 | static void ap_interrupt_handler(struct airq_struct *airq); |
122 | ||
f4eae94f MS |
123 | static int ap_airq_flag; |
124 | ||
125 | static struct airq_struct ap_airq = { | |
126 | .handler = ap_interrupt_handler, | |
127 | .isc = AP_ISC, | |
128 | }; | |
129 | ||
cb17a636 FB |
130 | /** |
131 | * ap_using_interrupts() - Returns non-zero if interrupt support is | |
132 | * available. | |
133 | */ | |
134 | static inline int ap_using_interrupts(void) | |
135 | { | |
f4eae94f | 136 | return ap_airq_flag; |
cb17a636 FB |
137 | } |
138 | ||
e28d2af4 IT |
139 | /** |
140 | * ap_airq_ptr() - Get the address of the adapter interrupt indicator | |
141 | * | |
142 | * Returns the address of the local-summary-indicator of the adapter | |
143 | * interrupt handler for AP, or NULL if adapter interrupts are not | |
144 | * available. | |
145 | */ | |
146 | void *ap_airq_ptr(void) | |
147 | { | |
148 | if (ap_using_interrupts()) | |
149 | return ap_airq.lsi_ptr; | |
150 | return NULL; | |
151 | } | |
152 | ||
cb17a636 FB |
153 | /** |
154 | * ap_interrupts_available(): Test if AP interrupts are available. | |
155 | * | |
156 | * Returns 1 if AP interrupts are available. | |
157 | */ | |
158 | static int ap_interrupts_available(void) | |
159 | { | |
86cd741b | 160 | return test_facility(65); |
cb17a636 FB |
161 | } |
162 | ||
75014550 HD |
163 | /** |
164 | * ap_configuration_available(): Test if AP configuration | |
165 | * information is available. | |
166 | * | |
167 | * Returns 1 if AP configuration information is available. | |
168 | */ | |
169 | static int ap_configuration_available(void) | |
170 | { | |
86cd741b | 171 | return test_facility(12); |
75014550 HD |
172 | } |
173 | ||
e7fc5146 TK |
174 | /** |
175 | * ap_apft_available(): Test if AP facilities test (APFT) | |
176 | * facility is available. | |
177 | * | |
178 | * Returns 1 if APFT is is available. | |
179 | */ | |
180 | static int ap_apft_available(void) | |
181 | { | |
182 | return test_facility(15); | |
183 | } | |
184 | ||
9a564108 HF |
185 | /* |
186 | * ap_qact_available(): Test if the PQAP(QACT) subfunction is available. | |
187 | * | |
188 | * Returns 1 if the QACT subfunction is available. | |
189 | */ | |
190 | static inline int ap_qact_available(void) | |
191 | { | |
192 | if (ap_configuration) | |
193 | return ap_configuration->qact; | |
194 | return 0; | |
195 | } | |
196 | ||
050349b5 HF |
197 | /* |
198 | * ap_query_configuration(): Fetch cryptographic config info | |
199 | * | |
200 | * Returns the ap configuration info fetched via PQAP(QCI). | |
201 | * On success 0 is returned, on failure a negative errno | |
202 | * is returned, e.g. if the PQAP(QCI) instruction is not | |
203 | * available, the return value will be -EOPNOTSUPP. | |
204 | */ | |
d62a6fae | 205 | static inline int ap_query_configuration(struct ap_config_info *info) |
11d37673 | 206 | { |
050349b5 | 207 | if (!ap_configuration_available()) |
11d37673 | 208 | return -EOPNOTSUPP; |
050349b5 HF |
209 | if (!info) |
210 | return -EINVAL; | |
211 | return ap_qci(info); | |
11d37673 | 212 | } |
050349b5 | 213 | EXPORT_SYMBOL(ap_query_configuration); |
11d37673 | 214 | |
889875a1 MS |
215 | /** |
216 | * ap_init_configuration(): Allocate and query configuration array. | |
217 | */ | |
218 | static void ap_init_configuration(void) | |
219 | { | |
220 | if (!ap_configuration_available()) | |
221 | return; | |
222 | ||
223 | ap_configuration = kzalloc(sizeof(*ap_configuration), GFP_KERNEL); | |
224 | if (!ap_configuration) | |
225 | return; | |
050349b5 | 226 | if (ap_query_configuration(ap_configuration) != 0) { |
889875a1 MS |
227 | kfree(ap_configuration); |
228 | ap_configuration = NULL; | |
229 | return; | |
230 | } | |
231 | } | |
232 | ||
233 | /* | |
234 | * ap_test_config(): helper function to extract the nrth bit | |
235 | * within the unsigned int array field. | |
236 | */ | |
237 | static inline int ap_test_config(unsigned int *field, unsigned int nr) | |
238 | { | |
239 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
240 | } | |
241 | ||
242 | /* | |
243 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
244 | * @id AP card ID | |
245 | * | |
246 | * Returns 0 if the card is not configured | |
247 | * 1 if the card is configured or | |
248 | * if the configuration information is not available | |
249 | */ | |
250 | static inline int ap_test_config_card_id(unsigned int id) | |
251 | { | |
252 | if (!ap_configuration) /* QCI not supported */ | |
8a557e93 HF |
253 | /* only ids 0...3F may be probed */ |
254 | return id < 0x40 ? 1 : 0; | |
889875a1 MS |
255 | return ap_test_config(ap_configuration->apm, id); |
256 | } | |
257 | ||
258 | /* | |
c83450ad HF |
259 | * ap_test_config_usage_domain(): Test, whether an AP usage domain |
260 | * is configured. | |
889875a1 MS |
261 | * @domain AP usage domain ID |
262 | * | |
263 | * Returns 0 if the usage domain is not configured | |
264 | * 1 if the usage domain is configured or | |
265 | * if the configuration information is not available | |
266 | */ | |
c83450ad | 267 | int ap_test_config_usage_domain(unsigned int domain) |
889875a1 MS |
268 | { |
269 | if (!ap_configuration) /* QCI not supported */ | |
270 | return domain < 16; | |
271 | return ap_test_config(ap_configuration->aqm, domain); | |
272 | } | |
c83450ad HF |
273 | EXPORT_SYMBOL(ap_test_config_usage_domain); |
274 | ||
275 | /* | |
276 | * ap_test_config_ctrl_domain(): Test, whether an AP control domain | |
277 | * is configured. | |
278 | * @domain AP control domain ID | |
279 | * | |
280 | * Returns 1 if the control domain is configured | |
281 | * 0 in all other cases | |
282 | */ | |
283 | int ap_test_config_ctrl_domain(unsigned int domain) | |
284 | { | |
285 | if (!ap_configuration) /* QCI not supported */ | |
286 | return 0; | |
287 | return ap_test_config(ap_configuration->adm, domain); | |
288 | } | |
289 | EXPORT_SYMBOL(ap_test_config_ctrl_domain); | |
889875a1 | 290 | |
1534c382 | 291 | /** |
1749a81d FB |
292 | * ap_query_queue(): Check if an AP queue is available. |
293 | * @qid: The AP queue number | |
294 | * @queue_depth: Pointer to queue depth value | |
295 | * @device_type: Pointer to device type value | |
6acbe21f | 296 | * @facilities: Pointer to facility indicator |
1534c382 | 297 | */ |
6acbe21f MS |
298 | static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type, |
299 | unsigned int *facilities) | |
1534c382 MS |
300 | { |
301 | struct ap_queue_status status; | |
6acbe21f | 302 | unsigned long info; |
889875a1 MS |
303 | int nd; |
304 | ||
e28d2af4 | 305 | if (!ap_test_config_card_id(AP_QID_CARD(qid))) |
889875a1 | 306 | return -ENODEV; |
1534c382 | 307 | |
e7fc5146 | 308 | status = ap_test_queue(qid, ap_apft_available(), &info); |
c50a160c IT |
309 | switch (status.response_code) { |
310 | case AP_RESPONSE_NORMAL: | |
6acbe21f MS |
311 | *queue_depth = (int)(info & 0xff); |
312 | *device_type = (int)((info >> 24) & 0xff); | |
313 | *facilities = (unsigned int)(info >> 32); | |
889875a1 MS |
314 | /* Update maximum domain id */ |
315 | nd = (info >> 16) & 0xff; | |
c1c1368d | 316 | /* if N bit is available, z13 and newer */ |
889875a1 MS |
317 | if ((info & (1UL << 57)) && nd > 0) |
318 | ap_max_domain_id = nd; | |
c1c1368d IT |
319 | else /* older machine types */ |
320 | ap_max_domain_id = 15; | |
14878424 HF |
321 | switch (*device_type) { |
322 | /* For CEX2 and CEX3 the available functions | |
323 | * are not refrected by the facilities bits. | |
324 | * Instead it is coded into the type. So here | |
325 | * modify the function bits based on the type. | |
326 | */ | |
327 | case AP_DEVICE_TYPE_CEX2A: | |
328 | case AP_DEVICE_TYPE_CEX3A: | |
329 | *facilities |= 0x08000000; | |
330 | break; | |
331 | case AP_DEVICE_TYPE_CEX2C: | |
332 | case AP_DEVICE_TYPE_CEX3C: | |
333 | *facilities |= 0x10000000; | |
334 | break; | |
335 | default: | |
336 | break; | |
337 | } | |
c50a160c IT |
338 | return 0; |
339 | case AP_RESPONSE_Q_NOT_AVAIL: | |
340 | case AP_RESPONSE_DECONFIGURED: | |
341 | case AP_RESPONSE_CHECKSTOPPED: | |
342 | case AP_RESPONSE_INVALID_ADDRESS: | |
343 | return -ENODEV; | |
344 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
345 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
346 | case AP_RESPONSE_BUSY: | |
347 | return -EBUSY; | |
348 | default: | |
349 | BUG(); | |
1534c382 | 350 | } |
1534c382 MS |
351 | } |
352 | ||
e28d2af4 | 353 | void ap_wait(enum ap_wait wait) |
3f3007af MS |
354 | { |
355 | ktime_t hr_time; | |
356 | ||
357 | switch (wait) { | |
358 | case AP_WAIT_AGAIN: | |
359 | case AP_WAIT_INTERRUPT: | |
360 | if (ap_using_interrupts()) | |
361 | break; | |
362 | if (ap_poll_kthread) { | |
363 | wake_up(&ap_poll_wait); | |
364 | break; | |
365 | } | |
366 | /* Fall through */ | |
367 | case AP_WAIT_TIMEOUT: | |
368 | spin_lock_bh(&ap_poll_timer_lock); | |
369 | if (!hrtimer_is_queued(&ap_poll_timer)) { | |
8b0e1953 | 370 | hr_time = poll_timeout; |
3f3007af MS |
371 | hrtimer_forward_now(&ap_poll_timer, hr_time); |
372 | hrtimer_restart(&ap_poll_timer); | |
373 | } | |
374 | spin_unlock_bh(&ap_poll_timer_lock); | |
375 | break; | |
376 | case AP_WAIT_NONE: | |
377 | default: | |
378 | break; | |
379 | } | |
380 | } | |
381 | ||
3f3007af MS |
382 | /** |
383 | * ap_request_timeout(): Handling of request timeouts | |
cefbeb5d | 384 | * @t: timer making this callback |
3f3007af MS |
385 | * |
386 | * Handles request timeouts. | |
387 | */ | |
cefbeb5d | 388 | void ap_request_timeout(struct timer_list *t) |
3f3007af | 389 | { |
cefbeb5d | 390 | struct ap_queue *aq = from_timer(aq, t, timeout); |
3f3007af MS |
391 | |
392 | if (ap_suspend_flag) | |
393 | return; | |
e28d2af4 IT |
394 | spin_lock_bh(&aq->lock); |
395 | ap_wait(ap_sm_event(aq, AP_EVENT_TIMEOUT)); | |
396 | spin_unlock_bh(&aq->lock); | |
3f3007af MS |
397 | } |
398 | ||
399 | /** | |
400 | * ap_poll_timeout(): AP receive polling for finished AP requests. | |
401 | * @unused: Unused pointer. | |
402 | * | |
403 | * Schedules the AP tasklet using a high resolution timer. | |
404 | */ | |
405 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) | |
406 | { | |
407 | if (!ap_suspend_flag) | |
408 | tasklet_schedule(&ap_tasklet); | |
409 | return HRTIMER_NORESTART; | |
410 | } | |
411 | ||
412 | /** | |
413 | * ap_interrupt_handler() - Schedule ap_tasklet on interrupt | |
414 | * @airq: pointer to adapter interrupt descriptor | |
415 | */ | |
416 | static void ap_interrupt_handler(struct airq_struct *airq) | |
417 | { | |
418 | inc_irq_stat(IRQIO_APB); | |
419 | if (!ap_suspend_flag) | |
420 | tasklet_schedule(&ap_tasklet); | |
421 | } | |
422 | ||
423 | /** | |
424 | * ap_tasklet_fn(): Tasklet to poll all AP devices. | |
425 | * @dummy: Unused variable | |
426 | * | |
427 | * Poll all AP devices on the bus. | |
428 | */ | |
429 | static void ap_tasklet_fn(unsigned long dummy) | |
430 | { | |
e28d2af4 IT |
431 | struct ap_card *ac; |
432 | struct ap_queue *aq; | |
3f3007af MS |
433 | enum ap_wait wait = AP_WAIT_NONE; |
434 | ||
435 | /* Reset the indicator if interrupts are used. Thus new interrupts can | |
436 | * be received. Doing it in the beginning of the tasklet is therefor | |
437 | * important that no requests on any AP get lost. | |
438 | */ | |
439 | if (ap_using_interrupts()) | |
440 | xchg(ap_airq.lsi_ptr, 0); | |
441 | ||
e28d2af4 IT |
442 | spin_lock_bh(&ap_list_lock); |
443 | for_each_ap_card(ac) { | |
444 | for_each_ap_queue(aq, ac) { | |
445 | spin_lock_bh(&aq->lock); | |
446 | wait = min(wait, ap_sm_event_loop(aq, AP_EVENT_POLL)); | |
447 | spin_unlock_bh(&aq->lock); | |
448 | } | |
3f3007af | 449 | } |
e28d2af4 IT |
450 | spin_unlock_bh(&ap_list_lock); |
451 | ||
452 | ap_wait(wait); | |
af512ed0 RW |
453 | } |
454 | ||
9af3e04e MS |
455 | static int ap_pending_requests(void) |
456 | { | |
e28d2af4 IT |
457 | struct ap_card *ac; |
458 | struct ap_queue *aq; | |
459 | ||
460 | spin_lock_bh(&ap_list_lock); | |
461 | for_each_ap_card(ac) { | |
462 | for_each_ap_queue(aq, ac) { | |
463 | if (aq->queue_count == 0) | |
464 | continue; | |
465 | spin_unlock_bh(&ap_list_lock); | |
466 | return 1; | |
9af3e04e | 467 | } |
9af3e04e | 468 | } |
e28d2af4 IT |
469 | spin_unlock_bh(&ap_list_lock); |
470 | return 0; | |
9af3e04e MS |
471 | } |
472 | ||
83e9d5d2 MS |
473 | /** |
474 | * ap_poll_thread(): Thread that polls for finished requests. | |
475 | * @data: Unused pointer | |
476 | * | |
477 | * AP bus poll thread. The purpose of this thread is to poll for | |
478 | * finished requests in a loop if there is a "free" cpu - that is | |
479 | * a cpu that doesn't have anything better to do. The polling stops | |
480 | * as soon as there is another task or if all messages have been | |
481 | * delivered. | |
482 | */ | |
483 | static int ap_poll_thread(void *data) | |
484 | { | |
485 | DECLARE_WAITQUEUE(wait, current); | |
83e9d5d2 MS |
486 | |
487 | set_user_nice(current, MAX_NICE); | |
488 | set_freezable(); | |
489 | while (!kthread_should_stop()) { | |
490 | add_wait_queue(&ap_poll_wait, &wait); | |
491 | set_current_state(TASK_INTERRUPTIBLE); | |
9af3e04e | 492 | if (ap_suspend_flag || !ap_pending_requests()) { |
83e9d5d2 MS |
493 | schedule(); |
494 | try_to_freeze(); | |
495 | } | |
496 | set_current_state(TASK_RUNNING); | |
497 | remove_wait_queue(&ap_poll_wait, &wait); | |
83e9d5d2 MS |
498 | if (need_resched()) { |
499 | schedule(); | |
500 | try_to_freeze(); | |
501 | continue; | |
502 | } | |
3f3007af | 503 | ap_tasklet_fn(0); |
9af3e04e MS |
504 | } |
505 | ||
83e9d5d2 MS |
506 | return 0; |
507 | } | |
508 | ||
509 | static int ap_poll_thread_start(void) | |
510 | { | |
511 | int rc; | |
512 | ||
513 | if (ap_using_interrupts() || ap_poll_kthread) | |
514 | return 0; | |
515 | mutex_lock(&ap_poll_thread_mutex); | |
516 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
517 | rc = PTR_RET(ap_poll_kthread); | |
518 | if (rc) | |
519 | ap_poll_kthread = NULL; | |
520 | mutex_unlock(&ap_poll_thread_mutex); | |
521 | return rc; | |
522 | } | |
523 | ||
524 | static void ap_poll_thread_stop(void) | |
525 | { | |
526 | if (!ap_poll_kthread) | |
527 | return; | |
528 | mutex_lock(&ap_poll_thread_mutex); | |
529 | kthread_stop(ap_poll_kthread); | |
530 | ap_poll_kthread = NULL; | |
531 | mutex_unlock(&ap_poll_thread_mutex); | |
532 | } | |
533 | ||
e28d2af4 IT |
534 | #define is_card_dev(x) ((x)->parent == ap_root_device) |
535 | #define is_queue_dev(x) ((x)->parent != ap_root_device) | |
1534c382 MS |
536 | |
537 | /** | |
1749a81d FB |
538 | * ap_bus_match() |
539 | * @dev: Pointer to device | |
540 | * @drv: Pointer to device_driver | |
541 | * | |
1534c382 MS |
542 | * AP bus driver registration/unregistration. |
543 | */ | |
544 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
545 | { | |
1534c382 MS |
546 | struct ap_driver *ap_drv = to_ap_drv(drv); |
547 | struct ap_device_id *id; | |
548 | ||
1749a81d | 549 | /* |
1534c382 MS |
550 | * Compare device type of the device with the list of |
551 | * supported types of the device_driver. | |
552 | */ | |
553 | for (id = ap_drv->ids; id->match_flags; id++) { | |
e28d2af4 IT |
554 | if (is_card_dev(dev) && |
555 | id->match_flags & AP_DEVICE_ID_MATCH_CARD_TYPE && | |
556 | id->dev_type == to_ap_dev(dev)->device_type) | |
557 | return 1; | |
558 | if (is_queue_dev(dev) && | |
559 | id->match_flags & AP_DEVICE_ID_MATCH_QUEUE_TYPE && | |
560 | id->dev_type == to_ap_dev(dev)->device_type) | |
561 | return 1; | |
1534c382 MS |
562 | } |
563 | return 0; | |
564 | } | |
565 | ||
566 | /** | |
1749a81d FB |
567 | * ap_uevent(): Uevent function for AP devices. |
568 | * @dev: Pointer to device | |
569 | * @env: Pointer to kobj_uevent_env | |
570 | * | |
571 | * It sets up a single environment variable DEV_TYPE which contains the | |
572 | * hardware device type. | |
1534c382 | 573 | */ |
cf65c71d | 574 | static int ap_uevent(struct device *dev, struct kobj_uevent_env *env) |
1534c382 MS |
575 | { |
576 | struct ap_device *ap_dev = to_ap_dev(dev); | |
7eff2e7a | 577 | int retval = 0; |
1534c382 MS |
578 | |
579 | if (!ap_dev) | |
580 | return -ENODEV; | |
581 | ||
582 | /* Set up DEV_TYPE environment variable. */ | |
7eff2e7a | 583 | retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); |
bf62456e ER |
584 | if (retval) |
585 | return retval; | |
586 | ||
66a4263b | 587 | /* Add MODALIAS= */ |
7eff2e7a | 588 | retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); |
bf62456e | 589 | |
bf62456e | 590 | return retval; |
1534c382 MS |
591 | } |
592 | ||
3e488c95 | 593 | static int ap_dev_suspend(struct device *dev) |
772f5472 FB |
594 | { |
595 | struct ap_device *ap_dev = to_ap_dev(dev); | |
772f5472 | 596 | |
e28d2af4 IT |
597 | if (ap_dev->drv && ap_dev->drv->suspend) |
598 | ap_dev->drv->suspend(ap_dev); | |
599 | return 0; | |
600 | } | |
601 | ||
602 | static int ap_dev_resume(struct device *dev) | |
603 | { | |
604 | struct ap_device *ap_dev = to_ap_dev(dev); | |
605 | ||
606 | if (ap_dev->drv && ap_dev->drv->resume) | |
607 | ap_dev->drv->resume(ap_dev); | |
83e9d5d2 MS |
608 | return 0; |
609 | } | |
5314af69 | 610 | |
83e9d5d2 MS |
611 | static void ap_bus_suspend(void) |
612 | { | |
cf65c71d | 613 | AP_DBF(DBF_DEBUG, "%s running\n", __func__); |
cccd85bf | 614 | |
83e9d5d2 MS |
615 | ap_suspend_flag = 1; |
616 | /* | |
617 | * Disable scanning for devices, thus we do not want to scan | |
618 | * for them after removing. | |
619 | */ | |
8139b89d | 620 | flush_work(&ap_scan_work); |
83e9d5d2 MS |
621 | tasklet_disable(&ap_tasklet); |
622 | } | |
623 | ||
e28d2af4 IT |
624 | static int __ap_card_devices_unregister(struct device *dev, void *dummy) |
625 | { | |
626 | if (is_card_dev(dev)) | |
627 | device_unregister(dev); | |
628 | return 0; | |
629 | } | |
630 | ||
631 | static int __ap_queue_devices_unregister(struct device *dev, void *dummy) | |
632 | { | |
633 | if (is_queue_dev(dev)) | |
634 | device_unregister(dev); | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data) | |
83e9d5d2 | 639 | { |
e28d2af4 IT |
640 | if (is_queue_dev(dev) && |
641 | AP_QID_CARD(to_ap_queue(dev)->qid) == (int)(long) data) | |
642 | device_unregister(dev); | |
83e9d5d2 MS |
643 | return 0; |
644 | } | |
645 | ||
646 | static void ap_bus_resume(void) | |
772f5472 | 647 | { |
f4eae94f | 648 | int rc; |
772f5472 | 649 | |
cf65c71d | 650 | AP_DBF(DBF_DEBUG, "%s running\n", __func__); |
cccd85bf | 651 | |
e28d2af4 IT |
652 | /* remove all queue devices */ |
653 | bus_for_each_dev(&ap_bus_type, NULL, NULL, | |
654 | __ap_queue_devices_unregister); | |
655 | /* remove all card devices */ | |
656 | bus_for_each_dev(&ap_bus_type, NULL, NULL, | |
657 | __ap_card_devices_unregister); | |
658 | ||
83e9d5d2 MS |
659 | /* Reset thin interrupt setting */ |
660 | if (ap_interrupts_available() && !ap_using_interrupts()) { | |
661 | rc = register_adapter_interrupt(&ap_airq); | |
662 | ap_airq_flag = (rc == 0); | |
5314af69 | 663 | } |
83e9d5d2 MS |
664 | if (!ap_interrupts_available() && ap_using_interrupts()) { |
665 | unregister_adapter_interrupt(&ap_airq); | |
666 | ap_airq_flag = 0; | |
667 | } | |
668 | /* Reset domain */ | |
669 | if (!user_set_domain) | |
670 | ap_domain_index = -1; | |
671 | /* Get things going again */ | |
672 | ap_suspend_flag = 0; | |
673 | if (ap_airq_flag) | |
674 | xchg(ap_airq.lsi_ptr, 0); | |
675 | tasklet_enable(&ap_tasklet); | |
8139b89d | 676 | queue_work(system_long_wq, &ap_scan_work); |
83e9d5d2 | 677 | } |
772f5472 | 678 | |
83e9d5d2 MS |
679 | static int ap_power_event(struct notifier_block *this, unsigned long event, |
680 | void *ptr) | |
681 | { | |
682 | switch (event) { | |
683 | case PM_HIBERNATION_PREPARE: | |
684 | case PM_SUSPEND_PREPARE: | |
685 | ap_bus_suspend(); | |
686 | break; | |
687 | case PM_POST_HIBERNATION: | |
688 | case PM_POST_SUSPEND: | |
689 | ap_bus_resume(); | |
690 | break; | |
691 | default: | |
692 | break; | |
693 | } | |
694 | return NOTIFY_DONE; | |
772f5472 | 695 | } |
83e9d5d2 MS |
696 | static struct notifier_block ap_power_notifier = { |
697 | .notifier_call = ap_power_event, | |
698 | }; | |
772f5472 | 699 | |
e28d2af4 | 700 | static SIMPLE_DEV_PM_OPS(ap_bus_pm_ops, ap_dev_suspend, ap_dev_resume); |
3e488c95 | 701 | |
1534c382 MS |
702 | static struct bus_type ap_bus_type = { |
703 | .name = "ap", | |
704 | .match = &ap_bus_match, | |
705 | .uevent = &ap_uevent, | |
3e488c95 | 706 | .pm = &ap_bus_pm_ops, |
1534c382 MS |
707 | }; |
708 | ||
3cb86ad0 HF |
709 | static int __ap_revise_reserved(struct device *dev, void *dummy) |
710 | { | |
711 | int rc, card, queue, devres, drvres; | |
712 | ||
713 | if (is_queue_dev(dev)) { | |
714 | card = AP_QID_CARD(to_ap_queue(dev)->qid); | |
715 | queue = AP_QID_QUEUE(to_ap_queue(dev)->qid); | |
716 | mutex_lock(&ap_perms_mutex); | |
717 | devres = test_bit_inv(card, ap_perms.apm) | |
718 | && test_bit_inv(queue, ap_perms.aqm); | |
719 | mutex_unlock(&ap_perms_mutex); | |
720 | drvres = to_ap_drv(dev->driver)->flags | |
721 | & AP_DRIVER_FLAG_DEFAULT; | |
722 | if (!!devres != !!drvres) { | |
723 | AP_DBF(DBF_DEBUG, "reprobing queue=%02x.%04x\n", | |
724 | card, queue); | |
725 | rc = device_reprobe(dev); | |
726 | } | |
727 | } | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
732 | static void ap_bus_revise_bindings(void) | |
733 | { | |
734 | bus_for_each_dev(&ap_bus_type, NULL, NULL, __ap_revise_reserved); | |
735 | } | |
736 | ||
737 | int ap_owned_by_def_drv(int card, int queue) | |
738 | { | |
739 | int rc = 0; | |
740 | ||
741 | if (card < 0 || card >= AP_DEVICES || queue < 0 || queue >= AP_DOMAINS) | |
742 | return -EINVAL; | |
743 | ||
744 | mutex_lock(&ap_perms_mutex); | |
745 | ||
746 | if (test_bit_inv(card, ap_perms.apm) | |
747 | && test_bit_inv(queue, ap_perms.aqm)) | |
748 | rc = 1; | |
749 | ||
750 | mutex_unlock(&ap_perms_mutex); | |
751 | ||
752 | return rc; | |
753 | } | |
754 | EXPORT_SYMBOL(ap_owned_by_def_drv); | |
755 | ||
756 | int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm, | |
757 | unsigned long *aqm) | |
758 | { | |
759 | int card, queue, rc = 0; | |
760 | ||
761 | mutex_lock(&ap_perms_mutex); | |
762 | ||
763 | for (card = 0; !rc && card < AP_DEVICES; card++) | |
764 | if (test_bit_inv(card, apm) && | |
765 | test_bit_inv(card, ap_perms.apm)) | |
766 | for (queue = 0; !rc && queue < AP_DOMAINS; queue++) | |
767 | if (test_bit_inv(queue, aqm) && | |
768 | test_bit_inv(queue, ap_perms.aqm)) | |
769 | rc = 1; | |
770 | ||
771 | mutex_unlock(&ap_perms_mutex); | |
772 | ||
773 | return rc; | |
774 | } | |
775 | EXPORT_SYMBOL(ap_apqn_in_matrix_owned_by_def_drv); | |
776 | ||
1534c382 MS |
777 | static int ap_device_probe(struct device *dev) |
778 | { | |
779 | struct ap_device *ap_dev = to_ap_dev(dev); | |
3f3007af | 780 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
3cb86ad0 HF |
781 | int card, queue, devres, drvres, rc; |
782 | ||
783 | if (is_queue_dev(dev)) { | |
784 | /* | |
785 | * If the apqn is marked as reserved/used by ap bus and | |
786 | * default drivers, only probe with drivers with the default | |
787 | * flag set. If it is not marked, only probe with drivers | |
788 | * with the default flag not set. | |
789 | */ | |
790 | card = AP_QID_CARD(to_ap_queue(dev)->qid); | |
791 | queue = AP_QID_QUEUE(to_ap_queue(dev)->qid); | |
792 | mutex_lock(&ap_perms_mutex); | |
793 | devres = test_bit_inv(card, ap_perms.apm) | |
794 | && test_bit_inv(queue, ap_perms.aqm); | |
795 | mutex_unlock(&ap_perms_mutex); | |
796 | drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT; | |
797 | if (!!devres != !!drvres) | |
798 | return -ENODEV; | |
de43b416 HF |
799 | /* (re-)init queue's state machine */ |
800 | ap_queue_reinit_state(to_ap_queue(dev)); | |
3cb86ad0 | 801 | } |
666e68e0 | 802 | |
e3850508 HF |
803 | /* Add queue/card to list of active queues/cards */ |
804 | spin_lock_bh(&ap_list_lock); | |
805 | if (is_card_dev(dev)) | |
806 | list_add(&to_ap_card(dev)->list, &ap_card_list); | |
807 | else | |
808 | list_add(&to_ap_queue(dev)->list, | |
809 | &to_ap_queue(dev)->card->queues); | |
810 | spin_unlock_bh(&ap_list_lock); | |
811 | ||
3f3007af | 812 | ap_dev->drv = ap_drv; |
1534c382 | 813 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
e3850508 HF |
814 | |
815 | if (rc) { | |
816 | spin_lock_bh(&ap_list_lock); | |
817 | if (is_card_dev(dev)) | |
818 | list_del_init(&to_ap_card(dev)->list); | |
819 | else | |
820 | list_del_init(&to_ap_queue(dev)->list); | |
821 | spin_unlock_bh(&ap_list_lock); | |
3f3007af | 822 | ap_dev->drv = NULL; |
e3850508 HF |
823 | } |
824 | ||
1534c382 MS |
825 | return rc; |
826 | } | |
827 | ||
1534c382 MS |
828 | static int ap_device_remove(struct device *dev) |
829 | { | |
830 | struct ap_device *ap_dev = to_ap_dev(dev); | |
831 | struct ap_driver *ap_drv = ap_dev->drv; | |
832 | ||
de43b416 HF |
833 | if (is_queue_dev(dev)) |
834 | ap_queue_remove(to_ap_queue(dev)); | |
e3850508 HF |
835 | if (ap_drv->remove) |
836 | ap_drv->remove(ap_dev); | |
837 | ||
838 | /* Remove queue/card from list of active queues/cards */ | |
e28d2af4 IT |
839 | spin_lock_bh(&ap_list_lock); |
840 | if (is_card_dev(dev)) | |
841 | list_del_init(&to_ap_card(dev)->list); | |
842 | else | |
843 | list_del_init(&to_ap_queue(dev)->list); | |
844 | spin_unlock_bh(&ap_list_lock); | |
e3850508 | 845 | |
1534c382 MS |
846 | return 0; |
847 | } | |
848 | ||
849 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, | |
850 | char *name) | |
851 | { | |
852 | struct device_driver *drv = &ap_drv->driver; | |
853 | ||
e387753c SS |
854 | if (!initialised) |
855 | return -ENODEV; | |
856 | ||
1534c382 MS |
857 | drv->bus = &ap_bus_type; |
858 | drv->probe = ap_device_probe; | |
859 | drv->remove = ap_device_remove; | |
860 | drv->owner = owner; | |
861 | drv->name = name; | |
862 | return driver_register(drv); | |
863 | } | |
864 | EXPORT_SYMBOL(ap_driver_register); | |
865 | ||
866 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
867 | { | |
868 | driver_unregister(&ap_drv->driver); | |
869 | } | |
870 | EXPORT_SYMBOL(ap_driver_unregister); | |
871 | ||
dabecb29 HD |
872 | void ap_bus_force_rescan(void) |
873 | { | |
83e9d5d2 MS |
874 | if (ap_suspend_flag) |
875 | return; | |
56bbe686 | 876 | /* processing a asynchronous bus rescan */ |
fcd0d1f6 | 877 | del_timer(&ap_config_timer); |
8139b89d MS |
878 | queue_work(system_long_wq, &ap_scan_work); |
879 | flush_work(&ap_scan_work); | |
dabecb29 HD |
880 | } |
881 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
882 | ||
1749a81d | 883 | /* |
f7ea641f HF |
884 | * hex2bitmap() - parse hex mask string and set bitmap. |
885 | * Valid strings are "0x012345678" with at least one valid hex number. | |
886 | * Rest of the bitmap to the right is padded with 0. No spaces allowed | |
887 | * within the string, the leading 0x may be omitted. | |
888 | * Returns the bitmask with exactly the bits set as given by the hex | |
889 | * string (both in big endian order). | |
1534c382 | 890 | */ |
3cb86ad0 HF |
891 | static int hex2bitmap(const char *str, unsigned long *bitmap, int bits) |
892 | { | |
893 | int i, n, b; | |
894 | ||
895 | /* bits needs to be a multiple of 8 */ | |
896 | if (bits & 0x07) | |
897 | return -EINVAL; | |
898 | ||
3cb86ad0 HF |
899 | if (str[0] == '0' && str[1] == 'x') |
900 | str++; | |
901 | if (*str == 'x') | |
902 | str++; | |
903 | ||
904 | for (i = 0; isxdigit(*str) && i < bits; str++) { | |
905 | b = hex_to_bin(*str); | |
906 | for (n = 0; n < 4; n++) | |
907 | if (b & (0x08 >> n)) | |
908 | set_bit_inv(i + n, bitmap); | |
909 | i += 4; | |
910 | } | |
911 | ||
f7ea641f HF |
912 | if (*str == '\n') |
913 | str++; | |
914 | if (*str) | |
915 | return -EINVAL; | |
916 | return 0; | |
917 | } | |
918 | ||
919 | /* | |
071eda99 MS |
920 | * modify_bitmap() - parse bitmask argument and modify an existing |
921 | * bit mask accordingly. A concatenation (done with ',') of these | |
922 | * terms is recognized: | |
f7ea641f HF |
923 | * +<bitnr>[-<bitnr>] or -<bitnr>[-<bitnr>] |
924 | * <bitnr> may be any valid number (hex, decimal or octal) in the range | |
925 | * 0...bits-1; the leading + or - is required. Here are some examples: | |
926 | * +0-15,+32,-128,-0xFF | |
927 | * -0-255,+1-16,+0x128 | |
928 | * +1,+2,+3,+4,-5,-7-10 | |
071eda99 MS |
929 | * Returns the new bitmap after all changes have been applied. Every |
930 | * positive value in the string will set a bit and every negative value | |
931 | * in the string will clear a bit. As a bit may be touched more than once, | |
932 | * the last 'operation' wins: | |
933 | * +0-255,-128 = first bits 0-255 will be set, then bit 128 will be | |
934 | * cleared again. All other bits are unmodified. | |
f7ea641f | 935 | */ |
071eda99 | 936 | static int modify_bitmap(const char *str, unsigned long *bitmap, int bits) |
f7ea641f HF |
937 | { |
938 | int a, i, z; | |
939 | char *np, sign; | |
940 | ||
941 | /* bits needs to be a multiple of 8 */ | |
942 | if (bits & 0x07) | |
3cb86ad0 HF |
943 | return -EINVAL; |
944 | ||
f7ea641f HF |
945 | while (*str) { |
946 | sign = *str++; | |
947 | if (sign != '+' && sign != '-') | |
948 | return -EINVAL; | |
949 | a = z = simple_strtoul(str, &np, 0); | |
950 | if (str == np || a >= bits) | |
951 | return -EINVAL; | |
952 | str = np; | |
953 | if (*str == '-') { | |
954 | z = simple_strtoul(++str, &np, 0); | |
955 | if (str == np || a > z || z >= bits) | |
956 | return -EINVAL; | |
957 | str = np; | |
958 | } | |
959 | for (i = a; i <= z; i++) | |
071eda99 MS |
960 | if (sign == '+') |
961 | set_bit_inv(i, bitmap); | |
962 | else | |
963 | clear_bit_inv(i, bitmap); | |
f7ea641f HF |
964 | while (*str == ',' || *str == '\n') |
965 | str++; | |
966 | } | |
967 | ||
3cb86ad0 HF |
968 | return 0; |
969 | } | |
970 | ||
f7ea641f HF |
971 | /* |
972 | * process_mask_arg() - parse a bitmap string and clear/set the | |
973 | * bits in the bitmap accordingly. The string may be given as | |
974 | * absolute value, a hex string like 0x1F2E3D4C5B6A" simple over- | |
975 | * writing the current content of the bitmap. Or as relative string | |
976 | * like "+1-16,-32,-0x40,+128" where only single bits or ranges of | |
977 | * bits are cleared or set. Distinction is done based on the very | |
978 | * first character which may be '+' or '-' for the relative string | |
979 | * and othewise assume to be an absolute value string. If parsing fails | |
980 | * a negative errno value is returned. All arguments and bitmaps are | |
981 | * big endian order. | |
982 | */ | |
983 | static int process_mask_arg(const char *str, | |
984 | unsigned long *bitmap, int bits, | |
985 | struct mutex *lock) | |
986 | { | |
071eda99 MS |
987 | unsigned long *newmap, size; |
988 | int rc; | |
f7ea641f HF |
989 | |
990 | /* bits needs to be a multiple of 8 */ | |
991 | if (bits & 0x07) | |
992 | return -EINVAL; | |
993 | ||
071eda99 MS |
994 | size = BITS_TO_LONGS(bits)*sizeof(unsigned long); |
995 | newmap = kmalloc(size, GFP_KERNEL); | |
996 | if (!newmap) | |
997 | return -ENOMEM; | |
998 | if (mutex_lock_interruptible(lock)) { | |
999 | kfree(newmap); | |
1000 | return -ERESTARTSYS; | |
1001 | } | |
1002 | ||
f7ea641f | 1003 | if (*str == '+' || *str == '-') { |
071eda99 MS |
1004 | memcpy(newmap, bitmap, size); |
1005 | rc = modify_bitmap(str, newmap, bits); | |
f7ea641f | 1006 | } else { |
071eda99 MS |
1007 | memset(newmap, 0, size); |
1008 | rc = hex2bitmap(str, newmap, bits); | |
f7ea641f | 1009 | } |
071eda99 MS |
1010 | if (rc == 0) |
1011 | memcpy(bitmap, newmap, size); | |
f7ea641f | 1012 | mutex_unlock(lock); |
071eda99 MS |
1013 | kfree(newmap); |
1014 | return rc; | |
f7ea641f HF |
1015 | } |
1016 | ||
1017 | /* | |
1018 | * AP bus attributes. | |
1019 | */ | |
1020 | ||
1534c382 MS |
1021 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) |
1022 | { | |
1023 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); | |
1024 | } | |
1025 | ||
fc1d3f02 IT |
1026 | static ssize_t ap_domain_store(struct bus_type *bus, |
1027 | const char *buf, size_t count) | |
1028 | { | |
1029 | int domain; | |
1030 | ||
1031 | if (sscanf(buf, "%i\n", &domain) != 1 || | |
3cb86ad0 HF |
1032 | domain < 0 || domain > ap_max_domain_id || |
1033 | !test_bit_inv(domain, ap_perms.aqm)) | |
fc1d3f02 IT |
1034 | return -EINVAL; |
1035 | spin_lock_bh(&ap_domain_lock); | |
1036 | ap_domain_index = domain; | |
1037 | spin_unlock_bh(&ap_domain_lock); | |
cccd85bf | 1038 | |
ac994e80 | 1039 | AP_DBF(DBF_DEBUG, "stored new default domain=%d\n", domain); |
cccd85bf | 1040 | |
fc1d3f02 IT |
1041 | return count; |
1042 | } | |
1043 | ||
cf65c71d | 1044 | static BUS_ATTR_RW(ap_domain); |
1534c382 | 1045 | |
91f3e3ea IT |
1046 | static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf) |
1047 | { | |
889875a1 MS |
1048 | if (!ap_configuration) /* QCI not supported */ |
1049 | return snprintf(buf, PAGE_SIZE, "not supported\n"); | |
e28d2af4 | 1050 | |
889875a1 MS |
1051 | return snprintf(buf, PAGE_SIZE, |
1052 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
91f3e3ea IT |
1053 | ap_configuration->adm[0], ap_configuration->adm[1], |
1054 | ap_configuration->adm[2], ap_configuration->adm[3], | |
1055 | ap_configuration->adm[4], ap_configuration->adm[5], | |
1056 | ap_configuration->adm[6], ap_configuration->adm[7]); | |
91f3e3ea IT |
1057 | } |
1058 | ||
cf65c71d | 1059 | static BUS_ATTR_RO(ap_control_domain_mask); |
91f3e3ea | 1060 | |
e28d2af4 IT |
1061 | static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf) |
1062 | { | |
1063 | if (!ap_configuration) /* QCI not supported */ | |
1064 | return snprintf(buf, PAGE_SIZE, "not supported\n"); | |
1065 | ||
1066 | return snprintf(buf, PAGE_SIZE, | |
1067 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
1068 | ap_configuration->aqm[0], ap_configuration->aqm[1], | |
1069 | ap_configuration->aqm[2], ap_configuration->aqm[3], | |
1070 | ap_configuration->aqm[4], ap_configuration->aqm[5], | |
1071 | ap_configuration->aqm[6], ap_configuration->aqm[7]); | |
1072 | } | |
1073 | ||
cf65c71d | 1074 | static BUS_ATTR_RO(ap_usage_domain_mask); |
1534c382 | 1075 | |
cb17a636 FB |
1076 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
1077 | { | |
1078 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
1079 | ap_using_interrupts() ? 1 : 0); | |
1080 | } | |
1081 | ||
cf65c71d HF |
1082 | static BUS_ATTR_RO(ap_interrupts); |
1083 | ||
1084 | static ssize_t config_time_show(struct bus_type *bus, char *buf) | |
1085 | { | |
1086 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); | |
1087 | } | |
cb17a636 | 1088 | |
cf65c71d HF |
1089 | static ssize_t config_time_store(struct bus_type *bus, |
1090 | const char *buf, size_t count) | |
1534c382 MS |
1091 | { |
1092 | int time; | |
1093 | ||
1094 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1095 | return -EINVAL; | |
1096 | ap_config_time = time; | |
fcd0d1f6 | 1097 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); |
1534c382 MS |
1098 | return count; |
1099 | } | |
1100 | ||
cf65c71d | 1101 | static BUS_ATTR_RW(config_time); |
1534c382 | 1102 | |
cf65c71d | 1103 | static ssize_t poll_thread_show(struct bus_type *bus, char *buf) |
1534c382 MS |
1104 | { |
1105 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); | |
1106 | } | |
1107 | ||
cf65c71d HF |
1108 | static ssize_t poll_thread_store(struct bus_type *bus, |
1109 | const char *buf, size_t count) | |
1534c382 MS |
1110 | { |
1111 | int flag, rc; | |
1112 | ||
1113 | if (sscanf(buf, "%d\n", &flag) != 1) | |
1114 | return -EINVAL; | |
1115 | if (flag) { | |
1116 | rc = ap_poll_thread_start(); | |
1117 | if (rc) | |
83e9d5d2 MS |
1118 | count = rc; |
1119 | } else | |
1534c382 MS |
1120 | ap_poll_thread_stop(); |
1121 | return count; | |
1122 | } | |
1123 | ||
cf65c71d | 1124 | static BUS_ATTR_RW(poll_thread); |
1534c382 | 1125 | |
fe137230 FB |
1126 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
1127 | { | |
1128 | return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); | |
1129 | } | |
1130 | ||
1131 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
1132 | size_t count) | |
1133 | { | |
1134 | unsigned long long time; | |
1135 | ktime_t hr_time; | |
1136 | ||
1137 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
1138 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
1139 | time > 120000000000ULL) | |
fe137230 FB |
1140 | return -EINVAL; |
1141 | poll_timeout = time; | |
8b0e1953 | 1142 | hr_time = poll_timeout; |
fe137230 | 1143 | |
8cc2af7c IT |
1144 | spin_lock_bh(&ap_poll_timer_lock); |
1145 | hrtimer_cancel(&ap_poll_timer); | |
1146 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1147 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
1148 | spin_unlock_bh(&ap_poll_timer_lock); | |
1149 | ||
fe137230 FB |
1150 | return count; |
1151 | } | |
1152 | ||
cf65c71d | 1153 | static BUS_ATTR_RW(poll_timeout); |
fe137230 | 1154 | |
5bc334bf IT |
1155 | static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf) |
1156 | { | |
889875a1 MS |
1157 | int max_domain_id; |
1158 | ||
1159 | if (ap_configuration) | |
1160 | max_domain_id = ap_max_domain_id ? : -1; | |
1161 | else | |
5bc334bf | 1162 | max_domain_id = 15; |
5bc334bf IT |
1163 | return snprintf(buf, PAGE_SIZE, "%d\n", max_domain_id); |
1164 | } | |
1165 | ||
cf65c71d | 1166 | static BUS_ATTR_RO(ap_max_domain_id); |
5bc334bf | 1167 | |
3cb86ad0 HF |
1168 | static ssize_t apmask_show(struct bus_type *bus, char *buf) |
1169 | { | |
1170 | int rc; | |
1171 | ||
1172 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1173 | return -ERESTARTSYS; | |
1174 | rc = snprintf(buf, PAGE_SIZE, | |
1175 | "0x%016lx%016lx%016lx%016lx\n", | |
1176 | ap_perms.apm[0], ap_perms.apm[1], | |
1177 | ap_perms.apm[2], ap_perms.apm[3]); | |
1178 | mutex_unlock(&ap_perms_mutex); | |
1179 | ||
1180 | return rc; | |
1181 | } | |
1182 | ||
1183 | static ssize_t apmask_store(struct bus_type *bus, const char *buf, | |
1184 | size_t count) | |
1185 | { | |
f7ea641f | 1186 | int rc; |
3cb86ad0 | 1187 | |
f7ea641f HF |
1188 | rc = process_mask_arg(buf, ap_perms.apm, AP_DEVICES, &ap_perms_mutex); |
1189 | if (rc) | |
1190 | return rc; | |
3cb86ad0 HF |
1191 | |
1192 | ap_bus_revise_bindings(); | |
1193 | ||
1194 | return count; | |
1195 | } | |
1196 | ||
1197 | static BUS_ATTR_RW(apmask); | |
1198 | ||
1199 | static ssize_t aqmask_show(struct bus_type *bus, char *buf) | |
1200 | { | |
1201 | int rc; | |
1202 | ||
1203 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1204 | return -ERESTARTSYS; | |
1205 | rc = snprintf(buf, PAGE_SIZE, | |
1206 | "0x%016lx%016lx%016lx%016lx\n", | |
1207 | ap_perms.aqm[0], ap_perms.aqm[1], | |
1208 | ap_perms.aqm[2], ap_perms.aqm[3]); | |
1209 | mutex_unlock(&ap_perms_mutex); | |
1210 | ||
1211 | return rc; | |
1212 | } | |
1213 | ||
1214 | static ssize_t aqmask_store(struct bus_type *bus, const char *buf, | |
1215 | size_t count) | |
1216 | { | |
f7ea641f | 1217 | int rc; |
3cb86ad0 | 1218 | |
f7ea641f HF |
1219 | rc = process_mask_arg(buf, ap_perms.aqm, AP_DOMAINS, &ap_perms_mutex); |
1220 | if (rc) | |
1221 | return rc; | |
3cb86ad0 HF |
1222 | |
1223 | ap_bus_revise_bindings(); | |
1224 | ||
1225 | return count; | |
1226 | } | |
1227 | ||
1228 | static BUS_ATTR_RW(aqmask); | |
1229 | ||
1534c382 MS |
1230 | static struct bus_attribute *const ap_bus_attrs[] = { |
1231 | &bus_attr_ap_domain, | |
91f3e3ea | 1232 | &bus_attr_ap_control_domain_mask, |
e28d2af4 | 1233 | &bus_attr_ap_usage_domain_mask, |
1534c382 MS |
1234 | &bus_attr_config_time, |
1235 | &bus_attr_poll_thread, | |
cb17a636 | 1236 | &bus_attr_ap_interrupts, |
fe137230 | 1237 | &bus_attr_poll_timeout, |
5bc334bf | 1238 | &bus_attr_ap_max_domain_id, |
3cb86ad0 HF |
1239 | &bus_attr_apmask, |
1240 | &bus_attr_aqmask, | |
fe137230 | 1241 | NULL, |
1534c382 MS |
1242 | }; |
1243 | ||
1244 | /** | |
198f8be8 HP |
1245 | * ap_select_domain(): Select an AP domain if possible and we haven't |
1246 | * already done so before. | |
1534c382 | 1247 | */ |
198f8be8 | 1248 | static void ap_select_domain(void) |
1534c382 | 1249 | { |
6acbe21f MS |
1250 | int count, max_count, best_domain; |
1251 | struct ap_queue_status status; | |
1252 | int i, j; | |
1534c382 | 1253 | |
1749a81d | 1254 | /* |
1534c382 MS |
1255 | * We want to use a single domain. Either the one specified with |
1256 | * the "domain=" parameter or the domain with the maximum number | |
1257 | * of devices. | |
1258 | */ | |
fc1d3f02 IT |
1259 | spin_lock_bh(&ap_domain_lock); |
1260 | if (ap_domain_index >= 0) { | |
1534c382 | 1261 | /* Domain has already been selected. */ |
fc1d3f02 | 1262 | spin_unlock_bh(&ap_domain_lock); |
198f8be8 | 1263 | return; |
fc1d3f02 | 1264 | } |
1534c382 MS |
1265 | best_domain = -1; |
1266 | max_count = 0; | |
1267 | for (i = 0; i < AP_DOMAINS; i++) { | |
c83450ad | 1268 | if (!ap_test_config_usage_domain(i) || |
3cb86ad0 | 1269 | !test_bit_inv(i, ap_perms.aqm)) |
75014550 | 1270 | continue; |
1534c382 MS |
1271 | count = 0; |
1272 | for (j = 0; j < AP_DEVICES; j++) { | |
75014550 HD |
1273 | if (!ap_test_config_card_id(j)) |
1274 | continue; | |
e7fc5146 TK |
1275 | status = ap_test_queue(AP_MKQID(j, i), |
1276 | ap_apft_available(), | |
1277 | NULL); | |
6acbe21f | 1278 | if (status.response_code != AP_RESPONSE_NORMAL) |
1534c382 MS |
1279 | continue; |
1280 | count++; | |
1281 | } | |
1282 | if (count > max_count) { | |
1283 | max_count = count; | |
1284 | best_domain = i; | |
1285 | } | |
1286 | } | |
cf65c71d | 1287 | if (best_domain >= 0) { |
1534c382 | 1288 | ap_domain_index = best_domain; |
ac994e80 | 1289 | AP_DBF(DBF_DEBUG, "new ap_domain_index=%d\n", ap_domain_index); |
1534c382 | 1290 | } |
fc1d3f02 | 1291 | spin_unlock_bh(&ap_domain_lock); |
1534c382 MS |
1292 | } |
1293 | ||
9a564108 HF |
1294 | /* |
1295 | * This function checks the type and returns either 0 for not | |
1296 | * supported or the highest compatible type value (which may | |
1297 | * include the input type value). | |
1298 | */ | |
1299 | static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func) | |
1300 | { | |
1301 | int comp_type = 0; | |
1302 | ||
1303 | /* < CEX2A is not supported */ | |
1304 | if (rawtype < AP_DEVICE_TYPE_CEX2A) | |
1305 | return 0; | |
1306 | /* up to CEX6 known and fully supported */ | |
1307 | if (rawtype <= AP_DEVICE_TYPE_CEX6) | |
1308 | return rawtype; | |
1309 | /* | |
1310 | * unknown new type > CEX6, check for compatibility | |
1311 | * to the highest known and supported type which is | |
1312 | * currently CEX6 with the help of the QACT function. | |
1313 | */ | |
1314 | if (ap_qact_available()) { | |
1315 | struct ap_queue_status status; | |
56c5c683 | 1316 | union ap_qact_ap_info apinfo = {0}; |
9a564108 HF |
1317 | |
1318 | apinfo.mode = (func >> 26) & 0x07; | |
1319 | apinfo.cat = AP_DEVICE_TYPE_CEX6; | |
1320 | status = ap_qact(qid, 0, &apinfo); | |
1321 | if (status.response_code == AP_RESPONSE_NORMAL | |
1322 | && apinfo.cat >= AP_DEVICE_TYPE_CEX2A | |
1323 | && apinfo.cat <= AP_DEVICE_TYPE_CEX6) | |
1324 | comp_type = apinfo.cat; | |
1325 | } | |
1326 | if (!comp_type) | |
1327 | AP_DBF(DBF_WARN, "queue=%02x.%04x unable to map type %d\n", | |
1328 | AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype); | |
1329 | else if (comp_type != rawtype) | |
1330 | AP_DBF(DBF_INFO, "queue=%02x.%04x map type %d to %d\n", | |
1331 | AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype, comp_type); | |
1332 | return comp_type; | |
1333 | } | |
1334 | ||
e28d2af4 IT |
1335 | /* |
1336 | * helper function to be used with bus_find_dev | |
1337 | * matches for the card device with the given id | |
1534c382 | 1338 | */ |
e28d2af4 | 1339 | static int __match_card_device_with_id(struct device *dev, void *data) |
1534c382 | 1340 | { |
e28d2af4 | 1341 | return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long) data; |
1534c382 MS |
1342 | } |
1343 | ||
e28d2af4 IT |
1344 | /* helper function to be used with bus_find_dev |
1345 | * matches for the queue device with a given qid | |
1346 | */ | |
1347 | static int __match_queue_device_with_qid(struct device *dev, void *data) | |
1348 | { | |
1349 | return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long) data; | |
1350 | } | |
1351 | ||
1352 | /** | |
1353 | * ap_scan_bus(): Scan the AP bus for new devices | |
1354 | * Runs periodically, workqueue timer (ap_config_time) | |
1355 | */ | |
4927b3f7 | 1356 | static void ap_scan_bus(struct work_struct *unused) |
1534c382 | 1357 | { |
e28d2af4 IT |
1358 | struct ap_queue *aq; |
1359 | struct ap_card *ac; | |
1534c382 MS |
1360 | struct device *dev; |
1361 | ap_qid_t qid; | |
9a564108 HF |
1362 | int comp_type, depth = 0, type = 0; |
1363 | unsigned int func = 0; | |
ac994e80 | 1364 | int rc, id, dom, borked, domains, defdomdevs = 0; |
1534c382 | 1365 | |
cf65c71d | 1366 | AP_DBF(DBF_DEBUG, "%s running\n", __func__); |
cccd85bf | 1367 | |
050349b5 | 1368 | ap_query_configuration(ap_configuration); |
198f8be8 | 1369 | ap_select_domain(); |
889875a1 | 1370 | |
e28d2af4 IT |
1371 | for (id = 0; id < AP_DEVICES; id++) { |
1372 | /* check if device is registered */ | |
1534c382 | 1373 | dev = bus_find_device(&ap_bus_type, NULL, |
e28d2af4 IT |
1374 | (void *)(long) id, |
1375 | __match_card_device_with_id); | |
1376 | ac = dev ? to_ap_card(dev) : NULL; | |
1377 | if (!ap_test_config_card_id(id)) { | |
1378 | if (dev) { | |
1379 | /* Card device has been removed from | |
1380 | * configuration, remove the belonging | |
1381 | * queue devices. | |
1382 | */ | |
1383 | bus_for_each_dev(&ap_bus_type, NULL, | |
1384 | (void *)(long) id, | |
1385 | __ap_queue_devices_with_id_unregister); | |
1386 | /* now remove the card device */ | |
3f3007af | 1387 | device_unregister(dev); |
e28d2af4 IT |
1388 | put_device(dev); |
1389 | } | |
1534c382 MS |
1390 | continue; |
1391 | } | |
e28d2af4 IT |
1392 | /* According to the configuration there should be a card |
1393 | * device, so check if there is at least one valid queue | |
1394 | * and maybe create queue devices and the card device. | |
1395 | */ | |
1396 | domains = 0; | |
1397 | for (dom = 0; dom < AP_DOMAINS; dom++) { | |
1398 | qid = AP_MKQID(id, dom); | |
1399 | dev = bus_find_device(&ap_bus_type, NULL, | |
1400 | (void *)(long) qid, | |
1401 | __match_queue_device_with_qid); | |
1402 | aq = dev ? to_ap_queue(dev) : NULL; | |
c83450ad | 1403 | if (!ap_test_config_usage_domain(dom)) { |
e28d2af4 IT |
1404 | if (dev) { |
1405 | /* Queue device exists but has been | |
1406 | * removed from configuration. | |
1407 | */ | |
1408 | device_unregister(dev); | |
1409 | put_device(dev); | |
1410 | } | |
1411 | continue; | |
1412 | } | |
9a564108 | 1413 | rc = ap_query_queue(qid, &depth, &type, &func); |
e28d2af4 IT |
1414 | if (dev) { |
1415 | spin_lock_bh(&aq->lock); | |
1416 | if (rc == -ENODEV || | |
1417 | /* adapter reconfiguration */ | |
9a564108 | 1418 | (ac && ac->functions != func)) |
e28d2af4 IT |
1419 | aq->state = AP_STATE_BORKED; |
1420 | borked = aq->state == AP_STATE_BORKED; | |
1421 | spin_unlock_bh(&aq->lock); | |
1422 | if (borked) /* Remove broken device */ | |
1423 | device_unregister(dev); | |
1424 | put_device(dev); | |
1425 | if (!borked) { | |
1426 | domains++; | |
ac994e80 HF |
1427 | if (dom == ap_domain_index) |
1428 | defdomdevs++; | |
e28d2af4 IT |
1429 | continue; |
1430 | } | |
1431 | } | |
1432 | if (rc) | |
1433 | continue; | |
9a564108 HF |
1434 | /* a new queue device is needed, check out comp type */ |
1435 | comp_type = ap_get_compatible_type(qid, type, func); | |
1436 | if (!comp_type) | |
1437 | continue; | |
1438 | /* maybe a card device needs to be created first */ | |
e28d2af4 | 1439 | if (!ac) { |
9a564108 HF |
1440 | ac = ap_card_create(id, depth, type, |
1441 | comp_type, func); | |
e28d2af4 IT |
1442 | if (!ac) |
1443 | continue; | |
1444 | ac->ap_dev.device.bus = &ap_bus_type; | |
1445 | ac->ap_dev.device.parent = ap_root_device; | |
1446 | dev_set_name(&ac->ap_dev.device, | |
1447 | "card%02x", id); | |
1448 | /* Register card with AP bus */ | |
1449 | rc = device_register(&ac->ap_dev.device); | |
1450 | if (rc) { | |
1451 | put_device(&ac->ap_dev.device); | |
1452 | ac = NULL; | |
1453 | break; | |
1454 | } | |
1455 | /* get it and thus adjust reference counter */ | |
1456 | get_device(&ac->ap_dev.device); | |
e28d2af4 IT |
1457 | } |
1458 | /* now create the new queue device */ | |
9a564108 | 1459 | aq = ap_queue_create(qid, comp_type); |
e28d2af4 IT |
1460 | if (!aq) |
1461 | continue; | |
1462 | aq->card = ac; | |
1463 | aq->ap_dev.device.bus = &ap_bus_type; | |
1464 | aq->ap_dev.device.parent = &ac->ap_dev.device; | |
1465 | dev_set_name(&aq->ap_dev.device, | |
1466 | "%02x.%04x", id, dom); | |
e28d2af4 IT |
1467 | /* Register device */ |
1468 | rc = device_register(&aq->ap_dev.device); | |
1469 | if (rc) { | |
e28d2af4 IT |
1470 | put_device(&aq->ap_dev.device); |
1471 | continue; | |
1472 | } | |
1473 | domains++; | |
ac994e80 HF |
1474 | if (dom == ap_domain_index) |
1475 | defdomdevs++; | |
e28d2af4 IT |
1476 | } /* end domain loop */ |
1477 | if (ac) { | |
1478 | /* remove card dev if there are no queue devices */ | |
1479 | if (!domains) | |
1480 | device_unregister(&ac->ap_dev.device); | |
1481 | put_device(&ac->ap_dev.device); | |
3f3007af | 1482 | } |
e28d2af4 | 1483 | } /* end device loop */ |
ac994e80 | 1484 | |
198f8be8 | 1485 | if (ap_domain_index >= 0 && defdomdevs < 1) |
cf65c71d HF |
1486 | AP_DBF(DBF_INFO, |
1487 | "no queue device with default domain %d available\n", | |
ac994e80 HF |
1488 | ap_domain_index); |
1489 | ||
fcd0d1f6 | 1490 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); |
1534c382 MS |
1491 | } |
1492 | ||
cefbeb5d | 1493 | static void ap_config_timeout(struct timer_list *unused) |
1534c382 | 1494 | { |
83e9d5d2 MS |
1495 | if (ap_suspend_flag) |
1496 | return; | |
8139b89d | 1497 | queue_work(system_long_wq, &ap_scan_work); |
1534c382 | 1498 | } |
13e742ba RW |
1499 | |
1500 | static void ap_reset_all(void) | |
85eca850 RW |
1501 | { |
1502 | int i, j; | |
1503 | ||
170387a8 | 1504 | for (i = 0; i < AP_DOMAINS; i++) { |
c83450ad | 1505 | if (!ap_test_config_usage_domain(i)) |
170387a8 IT |
1506 | continue; |
1507 | for (j = 0; j < AP_DEVICES; j++) { | |
1508 | if (!ap_test_config_card_id(j)) | |
1509 | continue; | |
0db78559 | 1510 | ap_rapq(AP_MKQID(j, i)); |
170387a8 IT |
1511 | } |
1512 | } | |
85eca850 RW |
1513 | } |
1514 | ||
1515 | static struct reset_call ap_reset_call = { | |
13e742ba | 1516 | .fn = ap_reset_all, |
85eca850 RW |
1517 | }; |
1518 | ||
cccd85bf HF |
1519 | int __init ap_debug_init(void) |
1520 | { | |
cccd85bf HF |
1521 | ap_dbf_info = debug_register("ap", 1, 1, |
1522 | DBF_MAX_SPRINTF_ARGS * sizeof(long)); | |
1523 | debug_register_view(ap_dbf_info, &debug_sprintf_view); | |
1524 | debug_set_level(ap_dbf_info, DBF_ERR); | |
1525 | ||
1526 | return 0; | |
1527 | } | |
1528 | ||
3cb86ad0 HF |
1529 | static void __init ap_perms_init(void) |
1530 | { | |
f7ea641f | 1531 | /* all resources useable if no kernel parameter string given */ |
3cb86ad0 HF |
1532 | memset(&ap_perms.apm, 0xFF, sizeof(ap_perms.apm)); |
1533 | memset(&ap_perms.aqm, 0xFF, sizeof(ap_perms.aqm)); | |
1534 | ||
f7ea641f | 1535 | /* apm kernel parameter string */ |
3cb86ad0 | 1536 | if (apm_str) { |
f7ea641f HF |
1537 | memset(&ap_perms.apm, 0, sizeof(ap_perms.apm)); |
1538 | process_mask_arg(apm_str, ap_perms.apm, AP_DEVICES, | |
1539 | &ap_perms_mutex); | |
3cb86ad0 | 1540 | } |
3cb86ad0 | 1541 | |
f7ea641f HF |
1542 | /* aqm kernel parameter string */ |
1543 | if (aqm_str) { | |
1544 | memset(&ap_perms.aqm, 0, sizeof(ap_perms.aqm)); | |
1545 | process_mask_arg(aqm_str, ap_perms.aqm, AP_DOMAINS, | |
1546 | &ap_perms_mutex); | |
3cb86ad0 HF |
1547 | } |
1548 | } | |
1549 | ||
1534c382 | 1550 | /** |
1749a81d FB |
1551 | * ap_module_init(): The module initialization code. |
1552 | * | |
1553 | * Initializes the module. | |
1534c382 MS |
1554 | */ |
1555 | int __init ap_module_init(void) | |
1556 | { | |
889875a1 | 1557 | int max_domain_id; |
1534c382 MS |
1558 | int rc, i; |
1559 | ||
cccd85bf HF |
1560 | rc = ap_debug_init(); |
1561 | if (rc) | |
1562 | return rc; | |
1563 | ||
94fdf2e7 | 1564 | if (!ap_instructions_available()) { |
889875a1 MS |
1565 | pr_warn("The hardware system does not support AP instructions\n"); |
1566 | return -ENODEV; | |
1567 | } | |
1568 | ||
3cb86ad0 HF |
1569 | /* set up the AP permissions (ap and aq masks) */ |
1570 | ap_perms_init(); | |
1571 | ||
889875a1 MS |
1572 | /* Get AP configuration data if available */ |
1573 | ap_init_configuration(); | |
1574 | ||
1575 | if (ap_configuration) | |
ac994e80 HF |
1576 | max_domain_id = |
1577 | ap_max_domain_id ? ap_max_domain_id : AP_DOMAINS - 1; | |
889875a1 MS |
1578 | else |
1579 | max_domain_id = 15; | |
3cb86ad0 HF |
1580 | if (ap_domain_index < -1 || ap_domain_index > max_domain_id || |
1581 | (ap_domain_index >= 0 && | |
1582 | !test_bit_inv(ap_domain_index, ap_perms.aqm))) { | |
889875a1 MS |
1583 | pr_warn("%d is not a valid cryptographic domain\n", |
1584 | ap_domain_index); | |
ac994e80 | 1585 | ap_domain_index = -1; |
1534c382 | 1586 | } |
5314af69 FB |
1587 | /* In resume callback we need to know if the user had set the domain. |
1588 | * If so, we can not just reset it. | |
1589 | */ | |
1590 | if (ap_domain_index >= 0) | |
1591 | user_set_domain = 1; | |
1592 | ||
cb17a636 | 1593 | if (ap_interrupts_available()) { |
f4eae94f MS |
1594 | rc = register_adapter_interrupt(&ap_airq); |
1595 | ap_airq_flag = (rc == 0); | |
cb17a636 FB |
1596 | } |
1597 | ||
85eca850 | 1598 | register_reset_call(&ap_reset_call); |
1534c382 MS |
1599 | |
1600 | /* Create /sys/bus/ap. */ | |
1601 | rc = bus_register(&ap_bus_type); | |
1602 | if (rc) | |
1603 | goto out; | |
1604 | for (i = 0; ap_bus_attrs[i]; i++) { | |
1605 | rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]); | |
1606 | if (rc) | |
1607 | goto out_bus; | |
1608 | } | |
1609 | ||
1610 | /* Create /sys/devices/ap. */ | |
035da16f | 1611 | ap_root_device = root_device_register("ap"); |
ba8da213 | 1612 | rc = PTR_RET(ap_root_device); |
1534c382 MS |
1613 | if (rc) |
1614 | goto out_bus; | |
1615 | ||
1749a81d | 1616 | /* Setup the AP bus rescan timer. */ |
cefbeb5d | 1617 | timer_setup(&ap_config_timer, ap_config_timeout, 0); |
1534c382 | 1618 | |
3f3007af MS |
1619 | /* |
1620 | * Setup the high resultion poll timer. | |
fe137230 FB |
1621 | * If we are running under z/VM adjust polling to z/VM polling rate. |
1622 | */ | |
1623 | if (MACHINE_IS_VM) | |
1624 | poll_timeout = 1500000; | |
93521314 | 1625 | spin_lock_init(&ap_poll_timer_lock); |
fe137230 FB |
1626 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
1627 | ap_poll_timer.function = ap_poll_timeout; | |
1628 | ||
1534c382 MS |
1629 | /* Start the low priority AP bus poll thread. */ |
1630 | if (ap_thread_flag) { | |
1631 | rc = ap_poll_thread_start(); | |
1632 | if (rc) | |
1633 | goto out_work; | |
1634 | } | |
1635 | ||
83e9d5d2 MS |
1636 | rc = register_pm_notifier(&ap_power_notifier); |
1637 | if (rc) | |
1638 | goto out_pm; | |
1639 | ||
8139b89d | 1640 | queue_work(system_long_wq, &ap_scan_work); |
e387753c | 1641 | initialised = true; |
3f3007af | 1642 | |
1534c382 MS |
1643 | return 0; |
1644 | ||
83e9d5d2 MS |
1645 | out_pm: |
1646 | ap_poll_thread_stop(); | |
1534c382 | 1647 | out_work: |
fe137230 | 1648 | hrtimer_cancel(&ap_poll_timer); |
035da16f | 1649 | root_device_unregister(ap_root_device); |
1534c382 MS |
1650 | out_bus: |
1651 | while (i--) | |
1652 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
1653 | bus_unregister(&ap_bus_type); | |
1654 | out: | |
85eca850 | 1655 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
1656 | if (ap_using_interrupts()) |
1657 | unregister_adapter_interrupt(&ap_airq); | |
889875a1 | 1658 | kfree(ap_configuration); |
1534c382 MS |
1659 | return rc; |
1660 | } | |
50a0d46c | 1661 | device_initcall(ap_module_init); |