1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Copyright IBM Corp. 2006, 2023 |
4 | * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
6 | * Ralph Wuerthner <rwuerthn@de.ibm.com> |
7 | * Felix Beck <felix.beck@de.ibm.com> |
8 | * Holger Dengler <hd@linux.vnet.ibm.com> |
9 | * Harald Freudenberger <freude@linux.ibm.com> |
10 | * |
11 | * Adjunct processor bus. |
12 | */ |
13 | |
14 | #define KMSG_COMPONENT "ap" |
15 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
16 | |
17 | #include <linux/kernel_stat.h> |
18 | #include <linux/moduleparam.h> |
19 | #include <linux/init.h> |
20 | #include <linux/delay.h> |
21 | #include <linux/err.h> |
22 | #include <linux/freezer.h> |
23 | #include <linux/interrupt.h> |
24 | #include <linux/workqueue.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/notifier.h> |
27 | #include <linux/kthread.h> |
28 | #include <linux/mutex.h> |
29 | #include <asm/airq.h> |
30 | #include <asm/tpi.h> |
31 | #include <linux/atomic.h> |
32 | #include <asm/isc.h> |
33 | #include <linux/hrtimer.h> |
34 | #include <linux/ktime.h> |
35 | #include <asm/facility.h> |
36 | #include <linux/crypto.h> |
37 | #include <linux/mod_devicetable.h> |
38 | #include <linux/debugfs.h> |
39 | #include <linux/ctype.h> |
40 | #include <linux/module.h> |
41 | |
42 | #include "ap_bus.h" |
43 | #include "ap_debug.h" |
44 | |
45 | /* |
46 | * Module parameters; note though this file itself isn't modular. |
47 | */ |
48 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ |
49 | static DEFINE_SPINLOCK(ap_domain_lock); |
50 | module_param_named(domain, ap_domain_index, int, 0440); |
51 | MODULE_PARM_DESC(domain, "domain index for ap devices" ); |
52 | EXPORT_SYMBOL(ap_domain_index); |
53 | |
54 | static int ap_thread_flag; |
55 | module_param_named(poll_thread, ap_thread_flag, int, 0440); |
56 | MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)." ); |
57 | |
58 | static char *apm_str; |
59 | module_param_named(apmask, apm_str, charp, 0440); |
60 | MODULE_PARM_DESC(apmask, "AP bus adapter mask." ); |
61 | |
62 | static char *aqm_str; |
63 | module_param_named(aqmask, aqm_str, charp, 0440); |
64 | MODULE_PARM_DESC(aqmask, "AP bus domain mask." ); |
65 | |
66 | static int ap_useirq = 1; |
67 | module_param_named(useirq, ap_useirq, int, 0440); |
68 | MODULE_PARM_DESC(useirq, "Use interrupt if available, default is 1 (on)." ); |
69 | |
70 | atomic_t ap_max_msg_size = ATOMIC_INIT(AP_DEFAULT_MAX_MSG_SIZE); |
71 | EXPORT_SYMBOL(ap_max_msg_size); |
72 | |
73 | static struct device *ap_root_device; |
74 | |
75 | /* Hashtable of all queue devices on the AP bus */ |
76 | DEFINE_HASHTABLE(ap_queues, 8); |
77 | /* lock used for the ap_queues hashtable */ |
78 | DEFINE_SPINLOCK(ap_queues_lock); |
79 | |
80 | /* Default permissions (ioctl, card and domain masking) */ |
81 | struct ap_perms ap_perms; |
82 | EXPORT_SYMBOL(ap_perms); |
83 | DEFINE_MUTEX(ap_perms_mutex); |
84 | EXPORT_SYMBOL(ap_perms_mutex); |
85 | |
86 | /* # of bus scans since init */ |
87 | static atomic64_t ap_scan_bus_count; |
88 | |
89 | /* # of bindings complete since init */ |
90 | static atomic64_t ap_bindings_complete_count = ATOMIC64_INIT(0); |
91 | |
92 | /* completion for initial APQN bindings complete */ |
93 | static DECLARE_COMPLETION(ap_init_apqn_bindings_complete); |
94 | |
95 | static struct ap_config_info *ap_qci_info; |
96 | static struct ap_config_info *ap_qci_info_old; |
97 | |
98 | /* |
99 | * AP bus related debug feature things. |
100 | */ |
101 | debug_info_t *ap_dbf_info; |
102 | |
103 | /* |
104 | * Workqueue timer for bus rescan. |
105 | */ |
106 | static struct timer_list ap_config_timer; |
107 | static int ap_config_time = AP_CONFIG_TIME; |
108 | static void ap_scan_bus(struct work_struct *); |
109 | static DECLARE_WORK(ap_scan_work, ap_scan_bus); |
110 | |
111 | /* |
112 | * Tasklet & timer for AP request polling and interrupts |
113 | */ |
114 | static void ap_tasklet_fn(unsigned long); |
115 | static DECLARE_TASKLET_OLD(ap_tasklet, ap_tasklet_fn); |
116 | static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait); |
117 | static struct task_struct *ap_poll_kthread; |
118 | static DEFINE_MUTEX(ap_poll_thread_mutex); |
119 | static DEFINE_SPINLOCK(ap_poll_timer_lock); |
120 | static struct hrtimer ap_poll_timer; |
121 | /* |
122 | * In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds. |
123 | * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling. |
124 | */ |
125 | static unsigned long poll_high_timeout = 250000UL; |
126 | |
127 | /* |
128 | * Some state machine states only require a low frequency polling. |
129 | * We use 25 Hz frequency for these. |
130 | */ |
131 | static unsigned long poll_low_timeout = 40000000UL; |
132 | |
133 | /* Maximum domain id, if not given via qci */ |
134 | static int ap_max_domain_id = 15; |
135 | /* Maximum adapter id, if not given via qci */ |
136 | static int ap_max_adapter_id = 63; |
137 | |
138 | static struct bus_type ap_bus_type; |
139 | |
140 | /* Adapter interrupt definitions */ |
141 | static void ap_interrupt_handler(struct airq_struct *airq, |
142 | struct tpi_info *tpi_info); |
143 | |
144 | static bool ap_irq_flag; |
145 | |
146 | static struct airq_struct ap_airq = { |
147 | .handler = ap_interrupt_handler, |
148 | .isc = AP_ISC, |
149 | }; |
150 | |
151 | /** |
152 | * ap_airq_ptr() - Get the address of the adapter interrupt indicator |
153 | * |
154 | * Returns the address of the local-summary-indicator of the adapter |
155 | * interrupt handler for AP, or NULL if adapter interrupts are not |
156 | * available. |
157 | */ |
158 | void *ap_airq_ptr(void) |
159 | { |
160 | if (ap_irq_flag) |
161 | return ap_airq.lsi_ptr; |
162 | return NULL; |
163 | } |
164 | |
165 | /** |
166 | * ap_interrupts_available(): Test if AP interrupts are available. |
167 | * |
168 | * Returns 1 if AP interrupts are available. |
169 | */ |
170 | static int ap_interrupts_available(void) |
171 | { |
172 | return test_facility(65); |
173 | } |
174 | |
175 | /** |
176 | * ap_qci_available(): Test if AP configuration |
177 | * information can be queried via QCI subfunction. |
178 | * |
179 | * Returns 1 if subfunction PQAP(QCI) is available. |
180 | */ |
181 | static int ap_qci_available(void) |
182 | { |
183 | return test_facility(12); |
184 | } |
185 | |
186 | /** |
187 | * ap_apft_available(): Test if AP facilities test (APFT) |
188 | * facility is available. |
189 | * |
190 | * Returns 1 if APFT is available. |
191 | */ |
192 | static int ap_apft_available(void) |
193 | { |
194 | return test_facility(15); |
195 | } |
196 | |
197 | /* |
198 | * ap_qact_available(): Test if the PQAP(QACT) subfunction is available. |
199 | * |
200 | * Returns 1 if the QACT subfunction is available. |
201 | */ |
202 | static inline int ap_qact_available(void) |
203 | { |
204 | if (ap_qci_info) |
205 | return ap_qci_info->qact; |
206 | return 0; |
207 | } |
208 | |
209 | /* |
210 | * ap_sb_available(): Test if the AP secure binding facility is available. |
211 | * |
212 | * Returns 1 if secure binding facility is available. |
213 | */ |
214 | int ap_sb_available(void) |
215 | { |
216 | if (ap_qci_info) |
217 | return ap_qci_info->apsb; |
218 | return 0; |
219 | } |
220 | |
221 | /* |
222 | * ap_is_se_guest(): Check for SE guest with AP pass-through support. |
223 | */ |
224 | bool ap_is_se_guest(void) |
225 | { |
226 | return is_prot_virt_guest() && ap_sb_available(); |
227 | } |
228 | EXPORT_SYMBOL(ap_is_se_guest); |
229 | |
230 | /* |
231 | * ap_fetch_qci_info(): Fetch cryptographic config info |
232 | * |
233 | * Returns the ap configuration info fetched via PQAP(QCI). |
234 | * On success 0 is returned, on failure a negative errno |
235 | * is returned, e.g. if the PQAP(QCI) instruction is not |
236 | * available, the return value will be -EOPNOTSUPP. |
237 | */ |
238 | static inline int ap_fetch_qci_info(struct ap_config_info *info) |
239 | { |
240 | if (!ap_qci_available()) |
241 | return -EOPNOTSUPP; |
242 | if (!info) |
243 | return -EINVAL; |
244 | return ap_qci(info); |
245 | } |
246 | |
247 | /** |
248 | * ap_init_qci_info(): Allocate and query qci config info. |
249 | * Does also update the static variables ap_max_domain_id |
250 | * and ap_max_adapter_id if this info is available. |
251 | */ |
252 | static void __init ap_init_qci_info(void) |
253 | { |
254 | if (!ap_qci_available()) { |
255 | AP_DBF_INFO("%s QCI not supported\n" , __func__); |
256 | return; |
257 | } |
258 | |
259 | ap_qci_info = kzalloc(sizeof(*ap_qci_info), GFP_KERNEL); |
260 | if (!ap_qci_info) |
261 | return; |
262 | ap_qci_info_old = kzalloc(sizeof(*ap_qci_info_old), GFP_KERNEL); |
263 | if (!ap_qci_info_old) { |
264 | kfree(objp: ap_qci_info); |
265 | ap_qci_info = NULL; |
266 | return; |
267 | } |
268 | if (ap_fetch_qci_info(info: ap_qci_info) != 0) { |
269 | kfree(objp: ap_qci_info); |
270 | kfree(objp: ap_qci_info_old); |
271 | ap_qci_info = NULL; |
272 | ap_qci_info_old = NULL; |
273 | return; |
274 | } |
275 | AP_DBF_INFO("%s successful fetched initial qci info\n" , __func__); |
276 | |
277 | if (ap_qci_info->apxa) { |
278 | if (ap_qci_info->na) { |
279 | ap_max_adapter_id = ap_qci_info->na; |
280 | AP_DBF_INFO("%s new ap_max_adapter_id is %d\n" , |
281 | __func__, ap_max_adapter_id); |
282 | } |
283 | if (ap_qci_info->nd) { |
284 | ap_max_domain_id = ap_qci_info->nd; |
285 | AP_DBF_INFO("%s new ap_max_domain_id is %d\n" , |
286 | __func__, ap_max_domain_id); |
287 | } |
288 | } |
289 | |
290 | memcpy(ap_qci_info_old, ap_qci_info, sizeof(*ap_qci_info)); |
291 | } |
292 | |
293 | /* |
294 | * ap_test_config(): helper function to extract the nrth bit |
295 | * within the unsigned int array field. |
296 | */ |
297 | static inline int ap_test_config(unsigned int *field, unsigned int nr) |
298 | { |
299 | return ap_test_bit(ptr: (field + (nr >> 5)), nr: (nr & 0x1f)); |
300 | } |
301 | |
302 | /* |
303 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. |
304 | * |
305 | * Returns 0 if the card is not configured |
306 | * 1 if the card is configured or |
307 | * if the configuration information is not available |
308 | */ |
309 | static inline int ap_test_config_card_id(unsigned int id) |
310 | { |
311 | if (id > ap_max_adapter_id) |
312 | return 0; |
313 | if (ap_qci_info) |
314 | return ap_test_config(field: ap_qci_info->apm, nr: id); |
315 | return 1; |
316 | } |
317 | |
318 | /* |
319 | * ap_test_config_usage_domain(): Test, whether an AP usage domain |
320 | * is configured. |
321 | * |
322 | * Returns 0 if the usage domain is not configured |
323 | * 1 if the usage domain is configured or |
324 | * if the configuration information is not available |
325 | */ |
326 | int ap_test_config_usage_domain(unsigned int domain) |
327 | { |
328 | if (domain > ap_max_domain_id) |
329 | return 0; |
330 | if (ap_qci_info) |
331 | return ap_test_config(field: ap_qci_info->aqm, nr: domain); |
332 | return 1; |
333 | } |
334 | EXPORT_SYMBOL(ap_test_config_usage_domain); |
335 | |
336 | /* |
337 | * ap_test_config_ctrl_domain(): Test, whether an AP control domain |
338 | * is configured. |
339 | * @domain AP control domain ID |
340 | * |
341 | * Returns 1 if the control domain is configured |
342 | * 0 in all other cases |
343 | */ |
344 | int ap_test_config_ctrl_domain(unsigned int domain) |
345 | { |
346 | if (!ap_qci_info || domain > ap_max_domain_id) |
347 | return 0; |
348 | return ap_test_config(field: ap_qci_info->adm, nr: domain); |
349 | } |
350 | EXPORT_SYMBOL(ap_test_config_ctrl_domain); |
351 | |
352 | /* |
353 | * ap_queue_info(): Check and get AP queue info. |
354 | * Returns: 1 if APQN exists and info is filled, |
355 | * 0 if APQN seems to exist but there is no info |
356 | * available (eg. caused by an asynch pending error) |
357 | * -1 invalid APQN, TAPQ error or AP queue status which |
358 | * indicates there is no APQN. |
359 | */ |
360 | static int ap_queue_info(ap_qid_t qid, int *q_type, unsigned int *q_fac, |
361 | int *q_depth, int *q_ml, bool *q_decfg, bool *q_cstop) |
362 | { |
363 | struct ap_queue_status status; |
364 | struct ap_tapq_gr2 tapq_info; |
365 | |
366 | tapq_info.value = 0; |
367 | |
368 | /* make sure we don't run into a specifiation exception */ |
369 | if (AP_QID_CARD(qid) > ap_max_adapter_id || |
370 | AP_QID_QUEUE(qid) > ap_max_domain_id) |
371 | return -1; |
372 | |
373 | /* call TAPQ on this APQN */ |
374 | status = ap_test_queue(qid, ap_apft_available(), &tapq_info); |
375 | |
376 | switch (status.response_code) { |
377 | case AP_RESPONSE_NORMAL: |
378 | case AP_RESPONSE_RESET_IN_PROGRESS: |
379 | case AP_RESPONSE_DECONFIGURED: |
380 | case AP_RESPONSE_CHECKSTOPPED: |
381 | case AP_RESPONSE_BUSY: |
382 | /* For all these RCs the tapq info should be available */ |
383 | break; |
384 | default: |
385 | /* On a pending async error the info should be available */ |
386 | if (!status.async) |
387 | return -1; |
388 | break; |
389 | } |
390 | |
391 | /* There should be at least one of the mode bits set */ |
392 | if (WARN_ON_ONCE(!tapq_info.value)) |
393 | return 0; |
394 | |
395 | *q_type = tapq_info.at; |
396 | *q_fac = tapq_info.fac; |
397 | *q_depth = tapq_info.qd; |
398 | *q_ml = tapq_info.ml; |
399 | *q_decfg = status.response_code == AP_RESPONSE_DECONFIGURED; |
400 | *q_cstop = status.response_code == AP_RESPONSE_CHECKSTOPPED; |
401 | |
402 | return 1; |
403 | } |
404 | |
405 | void ap_wait(enum ap_sm_wait wait) |
406 | { |
407 | ktime_t hr_time; |
408 | |
409 | switch (wait) { |
410 | case AP_SM_WAIT_AGAIN: |
411 | case AP_SM_WAIT_INTERRUPT: |
412 | if (ap_irq_flag) |
413 | break; |
414 | if (ap_poll_kthread) { |
415 | wake_up(&ap_poll_wait); |
416 | break; |
417 | } |
418 | fallthrough; |
419 | case AP_SM_WAIT_LOW_TIMEOUT: |
420 | case AP_SM_WAIT_HIGH_TIMEOUT: |
421 | spin_lock_bh(lock: &ap_poll_timer_lock); |
422 | if (!hrtimer_is_queued(timer: &ap_poll_timer)) { |
423 | hr_time = |
424 | wait == AP_SM_WAIT_LOW_TIMEOUT ? |
425 | poll_low_timeout : poll_high_timeout; |
426 | hrtimer_forward_now(timer: &ap_poll_timer, interval: hr_time); |
427 | hrtimer_restart(timer: &ap_poll_timer); |
428 | } |
429 | spin_unlock_bh(lock: &ap_poll_timer_lock); |
430 | break; |
431 | case AP_SM_WAIT_NONE: |
432 | default: |
433 | break; |
434 | } |
435 | } |
436 | |
437 | /** |
438 | * ap_request_timeout(): Handling of request timeouts |
439 | * @t: timer making this callback |
440 | * |
441 | * Handles request timeouts. |
442 | */ |
443 | void ap_request_timeout(struct timer_list *t) |
444 | { |
445 | struct ap_queue *aq = from_timer(aq, t, timeout); |
446 | |
447 | spin_lock_bh(lock: &aq->lock); |
448 | ap_wait(wait: ap_sm_event(aq, event: AP_SM_EVENT_TIMEOUT)); |
449 | spin_unlock_bh(lock: &aq->lock); |
450 | } |
451 | |
452 | /** |
453 | * ap_poll_timeout(): AP receive polling for finished AP requests. |
454 | * @unused: Unused pointer. |
455 | * |
456 | * Schedules the AP tasklet using a high resolution timer. |
457 | */ |
458 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) |
459 | { |
460 | tasklet_schedule(t: &ap_tasklet); |
461 | return HRTIMER_NORESTART; |
462 | } |
463 | |
464 | /** |
465 | * ap_interrupt_handler() - Schedule ap_tasklet on interrupt |
466 | * @airq: pointer to adapter interrupt descriptor |
467 | * @tpi_info: ignored |
468 | */ |
469 | static void ap_interrupt_handler(struct airq_struct *airq, |
470 | struct tpi_info *tpi_info) |
471 | { |
472 | inc_irq_stat(IRQIO_APB); |
473 | tasklet_schedule(t: &ap_tasklet); |
474 | } |
475 | |
476 | /** |
477 | * ap_tasklet_fn(): Tasklet to poll all AP devices. |
478 | * @dummy: Unused variable |
479 | * |
480 | * Poll all AP devices on the bus. |
481 | */ |
482 | static void ap_tasklet_fn(unsigned long dummy) |
483 | { |
484 | int bkt; |
485 | struct ap_queue *aq; |
486 | enum ap_sm_wait wait = AP_SM_WAIT_NONE; |
487 | |
488 | /* Reset the indicator if interrupts are used. Thus new interrupts can |
489 | * be received. Doing it in the beginning of the tasklet is therefore |
490 | * important that no requests on any AP get lost. |
491 | */ |
492 | if (ap_irq_flag) |
493 | xchg(ap_airq.lsi_ptr, 0); |
494 | |
495 | spin_lock_bh(lock: &ap_queues_lock); |
496 | hash_for_each(ap_queues, bkt, aq, hnode) { |
497 | spin_lock_bh(lock: &aq->lock); |
498 | wait = min(wait, ap_sm_event_loop(aq, AP_SM_EVENT_POLL)); |
499 | spin_unlock_bh(lock: &aq->lock); |
500 | } |
501 | spin_unlock_bh(lock: &ap_queues_lock); |
502 | |
503 | ap_wait(wait); |
504 | } |
505 | |
506 | static int ap_pending_requests(void) |
507 | { |
508 | int bkt; |
509 | struct ap_queue *aq; |
510 | |
511 | spin_lock_bh(lock: &ap_queues_lock); |
512 | hash_for_each(ap_queues, bkt, aq, hnode) { |
513 | if (aq->queue_count == 0) |
514 | continue; |
515 | spin_unlock_bh(lock: &ap_queues_lock); |
516 | return 1; |
517 | } |
518 | spin_unlock_bh(lock: &ap_queues_lock); |
519 | return 0; |
520 | } |
521 | |
522 | /** |
523 | * ap_poll_thread(): Thread that polls for finished requests. |
524 | * @data: Unused pointer |
525 | * |
526 | * AP bus poll thread. The purpose of this thread is to poll for |
527 | * finished requests in a loop if there is a "free" cpu - that is |
528 | * a cpu that doesn't have anything better to do. The polling stops |
529 | * as soon as there is another task or if all messages have been |
530 | * delivered. |
531 | */ |
532 | static int ap_poll_thread(void *data) |
533 | { |
534 | DECLARE_WAITQUEUE(wait, current); |
535 | |
536 | set_user_nice(current, MAX_NICE); |
537 | set_freezable(); |
538 | while (!kthread_should_stop()) { |
539 | add_wait_queue(wq_head: &ap_poll_wait, wq_entry: &wait); |
540 | set_current_state(TASK_INTERRUPTIBLE); |
541 | if (!ap_pending_requests()) { |
542 | schedule(); |
543 | try_to_freeze(); |
544 | } |
545 | set_current_state(TASK_RUNNING); |
546 | remove_wait_queue(wq_head: &ap_poll_wait, wq_entry: &wait); |
547 | if (need_resched()) { |
548 | schedule(); |
549 | try_to_freeze(); |
550 | continue; |
551 | } |
552 | ap_tasklet_fn(dummy: 0); |
553 | } |
554 | |
555 | return 0; |
556 | } |
557 | |
558 | static int ap_poll_thread_start(void) |
559 | { |
560 | int rc; |
561 | |
562 | if (ap_irq_flag || ap_poll_kthread) |
563 | return 0; |
564 | mutex_lock(&ap_poll_thread_mutex); |
565 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll" ); |
566 | rc = PTR_ERR_OR_ZERO(ptr: ap_poll_kthread); |
567 | if (rc) |
568 | ap_poll_kthread = NULL; |
569 | mutex_unlock(lock: &ap_poll_thread_mutex); |
570 | return rc; |
571 | } |
572 | |
573 | static void ap_poll_thread_stop(void) |
574 | { |
575 | if (!ap_poll_kthread) |
576 | return; |
577 | mutex_lock(&ap_poll_thread_mutex); |
578 | kthread_stop(k: ap_poll_kthread); |
579 | ap_poll_kthread = NULL; |
580 | mutex_unlock(lock: &ap_poll_thread_mutex); |
581 | } |
582 | |
583 | #define is_card_dev(x) ((x)->parent == ap_root_device) |
584 | #define is_queue_dev(x) ((x)->parent != ap_root_device) |
585 | |
586 | /** |
587 | * ap_bus_match() |
588 | * @dev: Pointer to device |
589 | * @drv: Pointer to device_driver |
590 | * |
591 | * AP bus driver registration/unregistration. |
592 | */ |
593 | static int ap_bus_match(struct device *dev, struct device_driver *drv) |
594 | { |
595 | struct ap_driver *ap_drv = to_ap_drv(drv); |
596 | struct ap_device_id *id; |
597 | |
598 | /* |
599 | * Compare device type of the device with the list of |
600 | * supported types of the device_driver. |
601 | */ |
602 | for (id = ap_drv->ids; id->match_flags; id++) { |
603 | if (is_card_dev(dev) && |
604 | id->match_flags & AP_DEVICE_ID_MATCH_CARD_TYPE && |
605 | id->dev_type == to_ap_dev(dev)->device_type) |
606 | return 1; |
607 | if (is_queue_dev(dev) && |
608 | id->match_flags & AP_DEVICE_ID_MATCH_QUEUE_TYPE && |
609 | id->dev_type == to_ap_dev(dev)->device_type) |
610 | return 1; |
611 | } |
612 | return 0; |
613 | } |
614 | |
615 | /** |
616 | * ap_uevent(): Uevent function for AP devices. |
617 | * @dev: Pointer to device |
618 | * @env: Pointer to kobj_uevent_env |
619 | * |
620 | * It sets up a single environment variable DEV_TYPE which contains the |
621 | * hardware device type. |
622 | */ |
623 | static int ap_uevent(const struct device *dev, struct kobj_uevent_env *env) |
624 | { |
625 | int rc = 0; |
626 | const struct ap_device *ap_dev = to_ap_dev(dev); |
627 | |
628 | /* Uevents from ap bus core don't need extensions to the env */ |
629 | if (dev == ap_root_device) |
630 | return 0; |
631 | |
632 | if (is_card_dev(dev)) { |
633 | struct ap_card *ac = to_ap_card(&ap_dev->device); |
634 | |
635 | /* Set up DEV_TYPE environment variable. */ |
636 | rc = add_uevent_var(env, format: "DEV_TYPE=%04X" , ap_dev->device_type); |
637 | if (rc) |
638 | return rc; |
639 | /* Add MODALIAS= */ |
640 | rc = add_uevent_var(env, format: "MODALIAS=ap:t%02X" , ap_dev->device_type); |
641 | if (rc) |
642 | return rc; |
643 | |
644 | /* Add MODE=<accel|cca|ep11> */ |
645 | if (ap_test_bit(ptr: &ac->functions, AP_FUNC_ACCEL)) |
646 | rc = add_uevent_var(env, format: "MODE=accel" ); |
647 | else if (ap_test_bit(ptr: &ac->functions, AP_FUNC_COPRO)) |
648 | rc = add_uevent_var(env, format: "MODE=cca" ); |
649 | else if (ap_test_bit(ptr: &ac->functions, AP_FUNC_EP11)) |
650 | rc = add_uevent_var(env, format: "MODE=ep11" ); |
651 | if (rc) |
652 | return rc; |
653 | } else { |
654 | struct ap_queue *aq = to_ap_queue(&ap_dev->device); |
655 | |
656 | /* Add MODE=<accel|cca|ep11> */ |
657 | if (ap_test_bit(ptr: &aq->card->functions, AP_FUNC_ACCEL)) |
658 | rc = add_uevent_var(env, format: "MODE=accel" ); |
659 | else if (ap_test_bit(ptr: &aq->card->functions, AP_FUNC_COPRO)) |
660 | rc = add_uevent_var(env, format: "MODE=cca" ); |
661 | else if (ap_test_bit(ptr: &aq->card->functions, AP_FUNC_EP11)) |
662 | rc = add_uevent_var(env, format: "MODE=ep11" ); |
663 | if (rc) |
664 | return rc; |
665 | } |
666 | |
667 | return 0; |
668 | } |
669 | |
670 | static void ap_send_init_scan_done_uevent(void) |
671 | { |
672 | char *envp[] = { "INITSCAN=done" , NULL }; |
673 | |
674 | kobject_uevent_env(kobj: &ap_root_device->kobj, action: KOBJ_CHANGE, envp); |
675 | } |
676 | |
677 | static void ap_send_bindings_complete_uevent(void) |
678 | { |
679 | char buf[32]; |
680 | char *envp[] = { "BINDINGS=complete" , buf, NULL }; |
681 | |
682 | snprintf(buf, size: sizeof(buf), fmt: "COMPLETECOUNT=%llu" , |
683 | atomic64_inc_return(v: &ap_bindings_complete_count)); |
684 | kobject_uevent_env(kobj: &ap_root_device->kobj, action: KOBJ_CHANGE, envp); |
685 | } |
686 | |
687 | void ap_send_config_uevent(struct ap_device *ap_dev, bool cfg) |
688 | { |
689 | char buf[16]; |
690 | char *envp[] = { buf, NULL }; |
691 | |
692 | snprintf(buf, size: sizeof(buf), fmt: "CONFIG=%d" , cfg ? 1 : 0); |
693 | |
694 | kobject_uevent_env(kobj: &ap_dev->device.kobj, action: KOBJ_CHANGE, envp); |
695 | } |
696 | EXPORT_SYMBOL(ap_send_config_uevent); |
697 | |
698 | void ap_send_online_uevent(struct ap_device *ap_dev, int online) |
699 | { |
700 | char buf[16]; |
701 | char *envp[] = { buf, NULL }; |
702 | |
703 | snprintf(buf, size: sizeof(buf), fmt: "ONLINE=%d" , online ? 1 : 0); |
704 | |
705 | kobject_uevent_env(kobj: &ap_dev->device.kobj, action: KOBJ_CHANGE, envp); |
706 | } |
707 | EXPORT_SYMBOL(ap_send_online_uevent); |
708 | |
709 | static void ap_send_mask_changed_uevent(unsigned long *newapm, |
710 | unsigned long *newaqm) |
711 | { |
712 | char buf[100]; |
713 | char *envp[] = { buf, NULL }; |
714 | |
715 | if (newapm) |
716 | snprintf(buf, size: sizeof(buf), |
717 | fmt: "APMASK=0x%016lx%016lx%016lx%016lx\n" , |
718 | newapm[0], newapm[1], newapm[2], newapm[3]); |
719 | else |
720 | snprintf(buf, size: sizeof(buf), |
721 | fmt: "AQMASK=0x%016lx%016lx%016lx%016lx\n" , |
722 | newaqm[0], newaqm[1], newaqm[2], newaqm[3]); |
723 | |
724 | kobject_uevent_env(kobj: &ap_root_device->kobj, action: KOBJ_CHANGE, envp); |
725 | } |
726 | |
727 | /* |
728 | * calc # of bound APQNs |
729 | */ |
730 | |
731 | struct __ap_calc_ctrs { |
732 | unsigned int apqns; |
733 | unsigned int bound; |
734 | }; |
735 | |
736 | static int __ap_calc_helper(struct device *dev, void *arg) |
737 | { |
738 | struct __ap_calc_ctrs *pctrs = (struct __ap_calc_ctrs *)arg; |
739 | |
740 | if (is_queue_dev(dev)) { |
741 | pctrs->apqns++; |
742 | if (dev->driver) |
743 | pctrs->bound++; |
744 | } |
745 | |
746 | return 0; |
747 | } |
748 | |
749 | static void ap_calc_bound_apqns(unsigned int *apqns, unsigned int *bound) |
750 | { |
751 | struct __ap_calc_ctrs ctrs; |
752 | |
753 | memset(&ctrs, 0, sizeof(ctrs)); |
754 | bus_for_each_dev(bus: &ap_bus_type, NULL, data: (void *)&ctrs, fn: __ap_calc_helper); |
755 | |
756 | *apqns = ctrs.apqns; |
757 | *bound = ctrs.bound; |
758 | } |
759 | |
760 | /* |
761 | * After initial ap bus scan do check if all existing APQNs are |
762 | * bound to device drivers. |
763 | */ |
764 | static void ap_check_bindings_complete(void) |
765 | { |
766 | unsigned int apqns, bound; |
767 | |
768 | if (atomic64_read(v: &ap_scan_bus_count) >= 1) { |
769 | ap_calc_bound_apqns(apqns: &apqns, bound: &bound); |
770 | if (bound == apqns) { |
771 | if (!completion_done(x: &ap_init_apqn_bindings_complete)) { |
772 | complete_all(&ap_init_apqn_bindings_complete); |
773 | AP_DBF_INFO("%s complete\n" , __func__); |
774 | } |
775 | ap_send_bindings_complete_uevent(); |
776 | } |
777 | } |
778 | } |
779 | |
780 | /* |
781 | * Interface to wait for the AP bus to have done one initial ap bus |
782 | * scan and all detected APQNs have been bound to device drivers. |
783 | * If these both conditions are not fulfilled, this function blocks |
784 | * on a condition with wait_for_completion_interruptible_timeout(). |
785 | * If these both conditions are fulfilled (before the timeout hits) |
786 | * the return value is 0. If the timeout (in jiffies) hits instead |
787 | * -ETIME is returned. On failures negative return values are |
788 | * returned to the caller. |
789 | */ |
790 | int ap_wait_init_apqn_bindings_complete(unsigned long timeout) |
791 | { |
792 | long l; |
793 | |
794 | if (completion_done(x: &ap_init_apqn_bindings_complete)) |
795 | return 0; |
796 | |
797 | if (timeout) |
798 | l = wait_for_completion_interruptible_timeout( |
799 | x: &ap_init_apqn_bindings_complete, timeout); |
800 | else |
801 | l = wait_for_completion_interruptible( |
802 | x: &ap_init_apqn_bindings_complete); |
803 | if (l < 0) |
804 | return l == -ERESTARTSYS ? -EINTR : l; |
805 | else if (l == 0 && timeout) |
806 | return -ETIME; |
807 | |
808 | return 0; |
809 | } |
810 | EXPORT_SYMBOL(ap_wait_init_apqn_bindings_complete); |
811 | |
812 | static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data) |
813 | { |
814 | if (is_queue_dev(dev) && |
815 | AP_QID_CARD(to_ap_queue(dev)->qid) == (int)(long)data) |
816 | device_unregister(dev); |
817 | return 0; |
818 | } |
819 | |
820 | static int __ap_revise_reserved(struct device *dev, void *dummy) |
821 | { |
822 | int rc, card, queue, devres, drvres; |
823 | |
824 | if (is_queue_dev(dev)) { |
825 | card = AP_QID_CARD(to_ap_queue(dev)->qid); |
826 | queue = AP_QID_QUEUE(to_ap_queue(dev)->qid); |
827 | mutex_lock(&ap_perms_mutex); |
828 | devres = test_bit_inv(card, ap_perms.apm) && |
829 | test_bit_inv(queue, ap_perms.aqm); |
830 | mutex_unlock(lock: &ap_perms_mutex); |
831 | drvres = to_ap_drv(dev->driver)->flags |
832 | & AP_DRIVER_FLAG_DEFAULT; |
833 | if (!!devres != !!drvres) { |
834 | AP_DBF_DBG("%s reprobing queue=%02x.%04x\n" , |
835 | __func__, card, queue); |
836 | rc = device_reprobe(dev); |
837 | if (rc) |
838 | AP_DBF_WARN("%s reprobing queue=%02x.%04x failed\n" , |
839 | __func__, card, queue); |
840 | } |
841 | } |
842 | |
843 | return 0; |
844 | } |
845 | |
846 | static void ap_bus_revise_bindings(void) |
847 | { |
848 | bus_for_each_dev(bus: &ap_bus_type, NULL, NULL, fn: __ap_revise_reserved); |
849 | } |
850 | |
851 | /** |
852 | * ap_owned_by_def_drv: indicates whether an AP adapter is reserved for the |
853 | * default host driver or not. |
854 | * @card: the APID of the adapter card to check |
855 | * @queue: the APQI of the queue to check |
856 | * |
857 | * Note: the ap_perms_mutex must be locked by the caller of this function. |
858 | * |
859 | * Return: an int specifying whether the AP adapter is reserved for the host (1) |
860 | * or not (0). |
861 | */ |
862 | int ap_owned_by_def_drv(int card, int queue) |
863 | { |
864 | int rc = 0; |
865 | |
866 | if (card < 0 || card >= AP_DEVICES || queue < 0 || queue >= AP_DOMAINS) |
867 | return -EINVAL; |
868 | |
869 | if (test_bit_inv(card, ap_perms.apm) && |
870 | test_bit_inv(queue, ap_perms.aqm)) |
871 | rc = 1; |
872 | |
873 | return rc; |
874 | } |
875 | EXPORT_SYMBOL(ap_owned_by_def_drv); |
876 | |
877 | /** |
878 | * ap_apqn_in_matrix_owned_by_def_drv: indicates whether every APQN contained in |
879 | * a set is reserved for the host drivers |
880 | * or not. |
881 | * @apm: a bitmap specifying a set of APIDs comprising the APQNs to check |
882 | * @aqm: a bitmap specifying a set of APQIs comprising the APQNs to check |
883 | * |
884 | * Note: the ap_perms_mutex must be locked by the caller of this function. |
885 | * |
886 | * Return: an int specifying whether each APQN is reserved for the host (1) or |
887 | * not (0) |
888 | */ |
889 | int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm, |
890 | unsigned long *aqm) |
891 | { |
892 | int card, queue, rc = 0; |
893 | |
894 | for (card = 0; !rc && card < AP_DEVICES; card++) |
895 | if (test_bit_inv(card, apm) && |
896 | test_bit_inv(card, ap_perms.apm)) |
897 | for (queue = 0; !rc && queue < AP_DOMAINS; queue++) |
898 | if (test_bit_inv(queue, aqm) && |
899 | test_bit_inv(queue, ap_perms.aqm)) |
900 | rc = 1; |
901 | |
902 | return rc; |
903 | } |
904 | EXPORT_SYMBOL(ap_apqn_in_matrix_owned_by_def_drv); |
905 | |
906 | static int ap_device_probe(struct device *dev) |
907 | { |
908 | struct ap_device *ap_dev = to_ap_dev(dev); |
909 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
910 | int card, queue, devres, drvres, rc = -ENODEV; |
911 | |
912 | if (!get_device(dev)) |
913 | return rc; |
914 | |
915 | if (is_queue_dev(dev)) { |
916 | /* |
917 | * If the apqn is marked as reserved/used by ap bus and |
918 | * default drivers, only probe with drivers with the default |
919 | * flag set. If it is not marked, only probe with drivers |
920 | * with the default flag not set. |
921 | */ |
922 | card = AP_QID_CARD(to_ap_queue(dev)->qid); |
923 | queue = AP_QID_QUEUE(to_ap_queue(dev)->qid); |
924 | mutex_lock(&ap_perms_mutex); |
925 | devres = test_bit_inv(card, ap_perms.apm) && |
926 | test_bit_inv(queue, ap_perms.aqm); |
927 | mutex_unlock(lock: &ap_perms_mutex); |
928 | drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT; |
929 | if (!!devres != !!drvres) |
930 | goto out; |
931 | } |
932 | |
933 | /* Add queue/card to list of active queues/cards */ |
934 | spin_lock_bh(lock: &ap_queues_lock); |
935 | if (is_queue_dev(dev)) |
936 | hash_add(ap_queues, &to_ap_queue(dev)->hnode, |
937 | to_ap_queue(dev)->qid); |
938 | spin_unlock_bh(lock: &ap_queues_lock); |
939 | |
940 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
941 | |
942 | if (rc) { |
943 | spin_lock_bh(lock: &ap_queues_lock); |
944 | if (is_queue_dev(dev)) |
945 | hash_del(node: &to_ap_queue(dev)->hnode); |
946 | spin_unlock_bh(lock: &ap_queues_lock); |
947 | } else { |
948 | ap_check_bindings_complete(); |
949 | } |
950 | |
951 | out: |
952 | if (rc) |
953 | put_device(dev); |
954 | return rc; |
955 | } |
956 | |
957 | static void ap_device_remove(struct device *dev) |
958 | { |
959 | struct ap_device *ap_dev = to_ap_dev(dev); |
960 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
961 | |
962 | /* prepare ap queue device removal */ |
963 | if (is_queue_dev(dev)) |
964 | ap_queue_prepare_remove(to_ap_queue(dev)); |
965 | |
966 | /* driver's chance to clean up gracefully */ |
967 | if (ap_drv->remove) |
968 | ap_drv->remove(ap_dev); |
969 | |
970 | /* now do the ap queue device remove */ |
971 | if (is_queue_dev(dev)) |
972 | ap_queue_remove(to_ap_queue(dev)); |
973 | |
974 | /* Remove queue/card from list of active queues/cards */ |
975 | spin_lock_bh(lock: &ap_queues_lock); |
976 | if (is_queue_dev(dev)) |
977 | hash_del(node: &to_ap_queue(dev)->hnode); |
978 | spin_unlock_bh(lock: &ap_queues_lock); |
979 | |
980 | put_device(dev); |
981 | } |
982 | |
983 | struct ap_queue *ap_get_qdev(ap_qid_t qid) |
984 | { |
985 | int bkt; |
986 | struct ap_queue *aq; |
987 | |
988 | spin_lock_bh(lock: &ap_queues_lock); |
989 | hash_for_each(ap_queues, bkt, aq, hnode) { |
990 | if (aq->qid == qid) { |
991 | get_device(dev: &aq->ap_dev.device); |
992 | spin_unlock_bh(lock: &ap_queues_lock); |
993 | return aq; |
994 | } |
995 | } |
996 | spin_unlock_bh(lock: &ap_queues_lock); |
997 | |
998 | return NULL; |
999 | } |
1000 | EXPORT_SYMBOL(ap_get_qdev); |
1001 | |
1002 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, |
1003 | char *name) |
1004 | { |
1005 | struct device_driver *drv = &ap_drv->driver; |
1006 | |
1007 | drv->bus = &ap_bus_type; |
1008 | drv->owner = owner; |
1009 | drv->name = name; |
1010 | return driver_register(drv); |
1011 | } |
1012 | EXPORT_SYMBOL(ap_driver_register); |
1013 | |
1014 | void ap_driver_unregister(struct ap_driver *ap_drv) |
1015 | { |
1016 | driver_unregister(drv: &ap_drv->driver); |
1017 | } |
1018 | EXPORT_SYMBOL(ap_driver_unregister); |
1019 | |
1020 | void ap_bus_force_rescan(void) |
1021 | { |
1022 | /* Only trigger AP bus scans after the initial scan is done */ |
1023 | if (atomic64_read(v: &ap_scan_bus_count) <= 0) |
1024 | return; |
1025 | |
1026 | /* processing a asynchronous bus rescan */ |
1027 | del_timer(timer: &ap_config_timer); |
1028 | queue_work(wq: system_long_wq, work: &ap_scan_work); |
1029 | flush_work(work: &ap_scan_work); |
1030 | } |
1031 | EXPORT_SYMBOL(ap_bus_force_rescan); |
1032 | |
1033 | /* |
1034 | * A config change has happened, force an ap bus rescan. |
1035 | */ |
1036 | void ap_bus_cfg_chg(void) |
1037 | { |
1038 | AP_DBF_DBG("%s config change, forcing bus rescan\n" , __func__); |
1039 | |
1040 | ap_bus_force_rescan(); |
1041 | } |
1042 | |
1043 | /* |
1044 | * hex2bitmap() - parse hex mask string and set bitmap. |
1045 | * Valid strings are "0x012345678" with at least one valid hex number. |
1046 | * Rest of the bitmap to the right is padded with 0. No spaces allowed |
1047 | * within the string, the leading 0x may be omitted. |
1048 | * Returns the bitmask with exactly the bits set as given by the hex |
1049 | * string (both in big endian order). |
1050 | */ |
1051 | static int hex2bitmap(const char *str, unsigned long *bitmap, int bits) |
1052 | { |
1053 | int i, n, b; |
1054 | |
1055 | /* bits needs to be a multiple of 8 */ |
1056 | if (bits & 0x07) |
1057 | return -EINVAL; |
1058 | |
1059 | if (str[0] == '0' && str[1] == 'x') |
1060 | str++; |
1061 | if (*str == 'x') |
1062 | str++; |
1063 | |
1064 | for (i = 0; isxdigit(*str) && i < bits; str++) { |
1065 | b = hex_to_bin(ch: *str); |
1066 | for (n = 0; n < 4; n++) |
1067 | if (b & (0x08 >> n)) |
1068 | set_bit_inv(i + n, bitmap); |
1069 | i += 4; |
1070 | } |
1071 | |
1072 | if (*str == '\n') |
1073 | str++; |
1074 | if (*str) |
1075 | return -EINVAL; |
1076 | return 0; |
1077 | } |
1078 | |
1079 | /* |
1080 | * modify_bitmap() - parse bitmask argument and modify an existing |
1081 | * bit mask accordingly. A concatenation (done with ',') of these |
1082 | * terms is recognized: |
1083 | * +<bitnr>[-<bitnr>] or -<bitnr>[-<bitnr>] |
1084 | * <bitnr> may be any valid number (hex, decimal or octal) in the range |
1085 | * 0...bits-1; the leading + or - is required. Here are some examples: |
1086 | * +0-15,+32,-128,-0xFF |
1087 | * -0-255,+1-16,+0x128 |
1088 | * +1,+2,+3,+4,-5,-7-10 |
1089 | * Returns the new bitmap after all changes have been applied. Every |
1090 | * positive value in the string will set a bit and every negative value |
1091 | * in the string will clear a bit. As a bit may be touched more than once, |
1092 | * the last 'operation' wins: |
1093 | * +0-255,-128 = first bits 0-255 will be set, then bit 128 will be |
1094 | * cleared again. All other bits are unmodified. |
1095 | */ |
1096 | static int modify_bitmap(const char *str, unsigned long *bitmap, int bits) |
1097 | { |
1098 | int a, i, z; |
1099 | char *np, sign; |
1100 | |
1101 | /* bits needs to be a multiple of 8 */ |
1102 | if (bits & 0x07) |
1103 | return -EINVAL; |
1104 | |
1105 | while (*str) { |
1106 | sign = *str++; |
1107 | if (sign != '+' && sign != '-') |
1108 | return -EINVAL; |
1109 | a = z = simple_strtoul(str, &np, 0); |
1110 | if (str == np || a >= bits) |
1111 | return -EINVAL; |
1112 | str = np; |
1113 | if (*str == '-') { |
1114 | z = simple_strtoul(++str, &np, 0); |
1115 | if (str == np || a > z || z >= bits) |
1116 | return -EINVAL; |
1117 | str = np; |
1118 | } |
1119 | for (i = a; i <= z; i++) |
1120 | if (sign == '+') |
1121 | set_bit_inv(i, bitmap); |
1122 | else |
1123 | clear_bit_inv(i, bitmap); |
1124 | while (*str == ',' || *str == '\n') |
1125 | str++; |
1126 | } |
1127 | |
1128 | return 0; |
1129 | } |
1130 | |
1131 | static int ap_parse_bitmap_str(const char *str, unsigned long *bitmap, int bits, |
1132 | unsigned long *newmap) |
1133 | { |
1134 | unsigned long size; |
1135 | int rc; |
1136 | |
1137 | size = BITS_TO_LONGS(bits) * sizeof(unsigned long); |
1138 | if (*str == '+' || *str == '-') { |
1139 | memcpy(newmap, bitmap, size); |
1140 | rc = modify_bitmap(str, bitmap: newmap, bits); |
1141 | } else { |
1142 | memset(newmap, 0, size); |
1143 | rc = hex2bitmap(str, bitmap: newmap, bits); |
1144 | } |
1145 | return rc; |
1146 | } |
1147 | |
1148 | int ap_parse_mask_str(const char *str, |
1149 | unsigned long *bitmap, int bits, |
1150 | struct mutex *lock) |
1151 | { |
1152 | unsigned long *newmap, size; |
1153 | int rc; |
1154 | |
1155 | /* bits needs to be a multiple of 8 */ |
1156 | if (bits & 0x07) |
1157 | return -EINVAL; |
1158 | |
1159 | size = BITS_TO_LONGS(bits) * sizeof(unsigned long); |
1160 | newmap = kmalloc(size, GFP_KERNEL); |
1161 | if (!newmap) |
1162 | return -ENOMEM; |
1163 | if (mutex_lock_interruptible(lock)) { |
1164 | kfree(objp: newmap); |
1165 | return -ERESTARTSYS; |
1166 | } |
1167 | rc = ap_parse_bitmap_str(str, bitmap, bits, newmap); |
1168 | if (rc == 0) |
1169 | memcpy(bitmap, newmap, size); |
1170 | mutex_unlock(lock); |
1171 | kfree(objp: newmap); |
1172 | return rc; |
1173 | } |
1174 | EXPORT_SYMBOL(ap_parse_mask_str); |
1175 | |
1176 | /* |
1177 | * AP bus attributes. |
1178 | */ |
1179 | |
1180 | static ssize_t ap_domain_show(const struct bus_type *bus, char *buf) |
1181 | { |
1182 | return sysfs_emit(buf, fmt: "%d\n" , ap_domain_index); |
1183 | } |
1184 | |
1185 | static ssize_t ap_domain_store(const struct bus_type *bus, |
1186 | const char *buf, size_t count) |
1187 | { |
1188 | int domain; |
1189 | |
1190 | if (sscanf(buf, "%i\n" , &domain) != 1 || |
1191 | domain < 0 || domain > ap_max_domain_id || |
1192 | !test_bit_inv(domain, ap_perms.aqm)) |
1193 | return -EINVAL; |
1194 | |
1195 | spin_lock_bh(lock: &ap_domain_lock); |
1196 | ap_domain_index = domain; |
1197 | spin_unlock_bh(lock: &ap_domain_lock); |
1198 | |
1199 | AP_DBF_INFO("%s stored new default domain=%d\n" , |
1200 | __func__, domain); |
1201 | |
1202 | return count; |
1203 | } |
1204 | |
1205 | static BUS_ATTR_RW(ap_domain); |
1206 | |
1207 | static ssize_t ap_control_domain_mask_show(const struct bus_type *bus, char *buf) |
1208 | { |
1209 | if (!ap_qci_info) /* QCI not supported */ |
1210 | return sysfs_emit(buf, fmt: "not supported\n" ); |
1211 | |
1212 | return sysfs_emit(buf, fmt: "0x%08x%08x%08x%08x%08x%08x%08x%08x\n" , |
1213 | ap_qci_info->adm[0], ap_qci_info->adm[1], |
1214 | ap_qci_info->adm[2], ap_qci_info->adm[3], |
1215 | ap_qci_info->adm[4], ap_qci_info->adm[5], |
1216 | ap_qci_info->adm[6], ap_qci_info->adm[7]); |
1217 | } |
1218 | |
1219 | static BUS_ATTR_RO(ap_control_domain_mask); |
1220 | |
1221 | static ssize_t ap_usage_domain_mask_show(const struct bus_type *bus, char *buf) |
1222 | { |
1223 | if (!ap_qci_info) /* QCI not supported */ |
1224 | return sysfs_emit(buf, fmt: "not supported\n" ); |
1225 | |
1226 | return sysfs_emit(buf, fmt: "0x%08x%08x%08x%08x%08x%08x%08x%08x\n" , |
1227 | ap_qci_info->aqm[0], ap_qci_info->aqm[1], |
1228 | ap_qci_info->aqm[2], ap_qci_info->aqm[3], |
1229 | ap_qci_info->aqm[4], ap_qci_info->aqm[5], |
1230 | ap_qci_info->aqm[6], ap_qci_info->aqm[7]); |
1231 | } |
1232 | |
1233 | static BUS_ATTR_RO(ap_usage_domain_mask); |
1234 | |
1235 | static ssize_t ap_adapter_mask_show(const struct bus_type *bus, char *buf) |
1236 | { |
1237 | if (!ap_qci_info) /* QCI not supported */ |
1238 | return sysfs_emit(buf, fmt: "not supported\n" ); |
1239 | |
1240 | return sysfs_emit(buf, fmt: "0x%08x%08x%08x%08x%08x%08x%08x%08x\n" , |
1241 | ap_qci_info->apm[0], ap_qci_info->apm[1], |
1242 | ap_qci_info->apm[2], ap_qci_info->apm[3], |
1243 | ap_qci_info->apm[4], ap_qci_info->apm[5], |
1244 | ap_qci_info->apm[6], ap_qci_info->apm[7]); |
1245 | } |
1246 | |
1247 | static BUS_ATTR_RO(ap_adapter_mask); |
1248 | |
1249 | static ssize_t ap_interrupts_show(const struct bus_type *bus, char *buf) |
1250 | { |
1251 | return sysfs_emit(buf, fmt: "%d\n" , ap_irq_flag ? 1 : 0); |
1252 | } |
1253 | |
1254 | static BUS_ATTR_RO(ap_interrupts); |
1255 | |
1256 | static ssize_t config_time_show(const struct bus_type *bus, char *buf) |
1257 | { |
1258 | return sysfs_emit(buf, fmt: "%d\n" , ap_config_time); |
1259 | } |
1260 | |
1261 | static ssize_t config_time_store(const struct bus_type *bus, |
1262 | const char *buf, size_t count) |
1263 | { |
1264 | int time; |
1265 | |
1266 | if (sscanf(buf, "%d\n" , &time) != 1 || time < 5 || time > 120) |
1267 | return -EINVAL; |
1268 | ap_config_time = time; |
1269 | mod_timer(timer: &ap_config_timer, expires: jiffies + ap_config_time * HZ); |
1270 | return count; |
1271 | } |
1272 | |
1273 | static BUS_ATTR_RW(config_time); |
1274 | |
1275 | static ssize_t poll_thread_show(const struct bus_type *bus, char *buf) |
1276 | { |
1277 | return sysfs_emit(buf, fmt: "%d\n" , ap_poll_kthread ? 1 : 0); |
1278 | } |
1279 | |
1280 | static ssize_t poll_thread_store(const struct bus_type *bus, |
1281 | const char *buf, size_t count) |
1282 | { |
1283 | bool value; |
1284 | int rc; |
1285 | |
1286 | rc = kstrtobool(s: buf, res: &value); |
1287 | if (rc) |
1288 | return rc; |
1289 | |
1290 | if (value) { |
1291 | rc = ap_poll_thread_start(); |
1292 | if (rc) |
1293 | count = rc; |
1294 | } else { |
1295 | ap_poll_thread_stop(); |
1296 | } |
1297 | return count; |
1298 | } |
1299 | |
1300 | static BUS_ATTR_RW(poll_thread); |
1301 | |
1302 | static ssize_t poll_timeout_show(const struct bus_type *bus, char *buf) |
1303 | { |
1304 | return sysfs_emit(buf, fmt: "%lu\n" , poll_high_timeout); |
1305 | } |
1306 | |
1307 | static ssize_t poll_timeout_store(const struct bus_type *bus, const char *buf, |
1308 | size_t count) |
1309 | { |
1310 | unsigned long value; |
1311 | ktime_t hr_time; |
1312 | int rc; |
1313 | |
1314 | rc = kstrtoul(s: buf, base: 0, res: &value); |
1315 | if (rc) |
1316 | return rc; |
1317 | |
1318 | /* 120 seconds = maximum poll interval */ |
1319 | if (value > 120000000000UL) |
1320 | return -EINVAL; |
1321 | poll_high_timeout = value; |
1322 | hr_time = poll_high_timeout; |
1323 | |
1324 | spin_lock_bh(lock: &ap_poll_timer_lock); |
1325 | hrtimer_cancel(timer: &ap_poll_timer); |
1326 | hrtimer_set_expires(timer: &ap_poll_timer, time: hr_time); |
1327 | hrtimer_start_expires(timer: &ap_poll_timer, mode: HRTIMER_MODE_ABS); |
1328 | spin_unlock_bh(lock: &ap_poll_timer_lock); |
1329 | |
1330 | return count; |
1331 | } |
1332 | |
1333 | static BUS_ATTR_RW(poll_timeout); |
1334 | |
1335 | static ssize_t ap_max_domain_id_show(const struct bus_type *bus, char *buf) |
1336 | { |
1337 | return sysfs_emit(buf, fmt: "%d\n" , ap_max_domain_id); |
1338 | } |
1339 | |
1340 | static BUS_ATTR_RO(ap_max_domain_id); |
1341 | |
1342 | static ssize_t ap_max_adapter_id_show(const struct bus_type *bus, char *buf) |
1343 | { |
1344 | return sysfs_emit(buf, fmt: "%d\n" , ap_max_adapter_id); |
1345 | } |
1346 | |
1347 | static BUS_ATTR_RO(ap_max_adapter_id); |
1348 | |
1349 | static ssize_t apmask_show(const struct bus_type *bus, char *buf) |
1350 | { |
1351 | int rc; |
1352 | |
1353 | if (mutex_lock_interruptible(&ap_perms_mutex)) |
1354 | return -ERESTARTSYS; |
1355 | rc = sysfs_emit(buf, fmt: "0x%016lx%016lx%016lx%016lx\n" , |
1356 | ap_perms.apm[0], ap_perms.apm[1], |
1357 | ap_perms.apm[2], ap_perms.apm[3]); |
1358 | mutex_unlock(lock: &ap_perms_mutex); |
1359 | |
1360 | return rc; |
1361 | } |
1362 | |
1363 | static int __verify_card_reservations(struct device_driver *drv, void *data) |
1364 | { |
1365 | int rc = 0; |
1366 | struct ap_driver *ap_drv = to_ap_drv(drv); |
1367 | unsigned long *newapm = (unsigned long *)data; |
1368 | |
1369 | /* |
1370 | * increase the driver's module refcounter to be sure it is not |
1371 | * going away when we invoke the callback function. |
1372 | */ |
1373 | if (!try_module_get(module: drv->owner)) |
1374 | return 0; |
1375 | |
1376 | if (ap_drv->in_use) { |
1377 | rc = ap_drv->in_use(newapm, ap_perms.aqm); |
1378 | if (rc) |
1379 | rc = -EBUSY; |
1380 | } |
1381 | |
1382 | /* release the driver's module */ |
1383 | module_put(module: drv->owner); |
1384 | |
1385 | return rc; |
1386 | } |
1387 | |
1388 | static int apmask_commit(unsigned long *newapm) |
1389 | { |
1390 | int rc; |
1391 | unsigned long reserved[BITS_TO_LONGS(AP_DEVICES)]; |
1392 | |
1393 | /* |
1394 | * Check if any bits in the apmask have been set which will |
1395 | * result in queues being removed from non-default drivers |
1396 | */ |
1397 | if (bitmap_andnot(dst: reserved, src1: newapm, src2: ap_perms.apm, AP_DEVICES)) { |
1398 | rc = bus_for_each_drv(bus: &ap_bus_type, NULL, data: reserved, |
1399 | fn: __verify_card_reservations); |
1400 | if (rc) |
1401 | return rc; |
1402 | } |
1403 | |
1404 | memcpy(ap_perms.apm, newapm, APMASKSIZE); |
1405 | |
1406 | return 0; |
1407 | } |
1408 | |
1409 | static ssize_t apmask_store(const struct bus_type *bus, const char *buf, |
1410 | size_t count) |
1411 | { |
1412 | int rc, changes = 0; |
1413 | DECLARE_BITMAP(newapm, AP_DEVICES); |
1414 | |
1415 | if (mutex_lock_interruptible(&ap_perms_mutex)) |
1416 | return -ERESTARTSYS; |
1417 | |
1418 | rc = ap_parse_bitmap_str(str: buf, bitmap: ap_perms.apm, AP_DEVICES, newmap: newapm); |
1419 | if (rc) |
1420 | goto done; |
1421 | |
1422 | changes = memcmp(p: ap_perms.apm, q: newapm, APMASKSIZE); |
1423 | if (changes) |
1424 | rc = apmask_commit(newapm); |
1425 | |
1426 | done: |
1427 | mutex_unlock(lock: &ap_perms_mutex); |
1428 | if (rc) |
1429 | return rc; |
1430 | |
1431 | if (changes) { |
1432 | ap_bus_revise_bindings(); |
1433 | ap_send_mask_changed_uevent(newapm, NULL); |
1434 | } |
1435 | |
1436 | return count; |
1437 | } |
1438 | |
1439 | static BUS_ATTR_RW(apmask); |
1440 | |
1441 | static ssize_t aqmask_show(const struct bus_type *bus, char *buf) |
1442 | { |
1443 | int rc; |
1444 | |
1445 | if (mutex_lock_interruptible(&ap_perms_mutex)) |
1446 | return -ERESTARTSYS; |
1447 | rc = sysfs_emit(buf, fmt: "0x%016lx%016lx%016lx%016lx\n" , |
1448 | ap_perms.aqm[0], ap_perms.aqm[1], |
1449 | ap_perms.aqm[2], ap_perms.aqm[3]); |
1450 | mutex_unlock(lock: &ap_perms_mutex); |
1451 | |
1452 | return rc; |
1453 | } |
1454 | |
1455 | static int __verify_queue_reservations(struct device_driver *drv, void *data) |
1456 | { |
1457 | int rc = 0; |
1458 | struct ap_driver *ap_drv = to_ap_drv(drv); |
1459 | unsigned long *newaqm = (unsigned long *)data; |
1460 | |
1461 | /* |
1462 | * increase the driver's module refcounter to be sure it is not |
1463 | * going away when we invoke the callback function. |
1464 | */ |
1465 | if (!try_module_get(module: drv->owner)) |
1466 | return 0; |
1467 | |
1468 | if (ap_drv->in_use) { |
1469 | rc = ap_drv->in_use(ap_perms.apm, newaqm); |
1470 | if (rc) |
1471 | rc = -EBUSY; |
1472 | } |
1473 | |
1474 | /* release the driver's module */ |
1475 | module_put(module: drv->owner); |
1476 | |
1477 | return rc; |
1478 | } |
1479 | |
1480 | static int aqmask_commit(unsigned long *newaqm) |
1481 | { |
1482 | int rc; |
1483 | unsigned long reserved[BITS_TO_LONGS(AP_DOMAINS)]; |
1484 | |
1485 | /* |
1486 | * Check if any bits in the aqmask have been set which will |
1487 | * result in queues being removed from non-default drivers |
1488 | */ |
1489 | if (bitmap_andnot(dst: reserved, src1: newaqm, src2: ap_perms.aqm, AP_DOMAINS)) { |
1490 | rc = bus_for_each_drv(bus: &ap_bus_type, NULL, data: reserved, |
1491 | fn: __verify_queue_reservations); |
1492 | if (rc) |
1493 | return rc; |
1494 | } |
1495 | |
1496 | memcpy(ap_perms.aqm, newaqm, AQMASKSIZE); |
1497 | |
1498 | return 0; |
1499 | } |
1500 | |
1501 | static ssize_t aqmask_store(const struct bus_type *bus, const char *buf, |
1502 | size_t count) |
1503 | { |
1504 | int rc, changes = 0; |
1505 | DECLARE_BITMAP(newaqm, AP_DOMAINS); |
1506 | |
1507 | if (mutex_lock_interruptible(&ap_perms_mutex)) |
1508 | return -ERESTARTSYS; |
1509 | |
1510 | rc = ap_parse_bitmap_str(str: buf, bitmap: ap_perms.aqm, AP_DOMAINS, newmap: newaqm); |
1511 | if (rc) |
1512 | goto done; |
1513 | |
1514 | changes = memcmp(p: ap_perms.aqm, q: newaqm, APMASKSIZE); |
1515 | if (changes) |
1516 | rc = aqmask_commit(newaqm); |
1517 | |
1518 | done: |
1519 | mutex_unlock(lock: &ap_perms_mutex); |
1520 | if (rc) |
1521 | return rc; |
1522 | |
1523 | if (changes) { |
1524 | ap_bus_revise_bindings(); |
1525 | ap_send_mask_changed_uevent(NULL, newaqm); |
1526 | } |
1527 | |
1528 | return count; |
1529 | } |
1530 | |
1531 | static BUS_ATTR_RW(aqmask); |
1532 | |
1533 | static ssize_t scans_show(const struct bus_type *bus, char *buf) |
1534 | { |
1535 | return sysfs_emit(buf, fmt: "%llu\n" , atomic64_read(v: &ap_scan_bus_count)); |
1536 | } |
1537 | |
1538 | static ssize_t scans_store(const struct bus_type *bus, const char *buf, |
1539 | size_t count) |
1540 | { |
1541 | AP_DBF_INFO("%s force AP bus rescan\n" , __func__); |
1542 | |
1543 | ap_bus_force_rescan(); |
1544 | |
1545 | return count; |
1546 | } |
1547 | |
1548 | static BUS_ATTR_RW(scans); |
1549 | |
1550 | static ssize_t bindings_show(const struct bus_type *bus, char *buf) |
1551 | { |
1552 | int rc; |
1553 | unsigned int apqns, n; |
1554 | |
1555 | ap_calc_bound_apqns(apqns: &apqns, bound: &n); |
1556 | if (atomic64_read(v: &ap_scan_bus_count) >= 1 && n == apqns) |
1557 | rc = sysfs_emit(buf, fmt: "%u/%u (complete)\n" , n, apqns); |
1558 | else |
1559 | rc = sysfs_emit(buf, fmt: "%u/%u\n" , n, apqns); |
1560 | |
1561 | return rc; |
1562 | } |
1563 | |
1564 | static BUS_ATTR_RO(bindings); |
1565 | |
1566 | static ssize_t features_show(const struct bus_type *bus, char *buf) |
1567 | { |
1568 | int n = 0; |
1569 | |
1570 | if (!ap_qci_info) /* QCI not supported */ |
1571 | return sysfs_emit(buf, fmt: "-\n" ); |
1572 | |
1573 | if (ap_qci_info->apsc) |
1574 | n += sysfs_emit_at(buf, at: n, fmt: "APSC " ); |
1575 | if (ap_qci_info->apxa) |
1576 | n += sysfs_emit_at(buf, at: n, fmt: "APXA " ); |
1577 | if (ap_qci_info->qact) |
1578 | n += sysfs_emit_at(buf, at: n, fmt: "QACT " ); |
1579 | if (ap_qci_info->rc8a) |
1580 | n += sysfs_emit_at(buf, at: n, fmt: "RC8A " ); |
1581 | if (ap_qci_info->apsb) |
1582 | n += sysfs_emit_at(buf, at: n, fmt: "APSB " ); |
1583 | |
1584 | sysfs_emit_at(buf, at: n == 0 ? 0 : n - 1, fmt: "\n" ); |
1585 | |
1586 | return n; |
1587 | } |
1588 | |
1589 | static BUS_ATTR_RO(features); |
1590 | |
1591 | static struct attribute *ap_bus_attrs[] = { |
1592 | &bus_attr_ap_domain.attr, |
1593 | &bus_attr_ap_control_domain_mask.attr, |
1594 | &bus_attr_ap_usage_domain_mask.attr, |
1595 | &bus_attr_ap_adapter_mask.attr, |
1596 | &bus_attr_config_time.attr, |
1597 | &bus_attr_poll_thread.attr, |
1598 | &bus_attr_ap_interrupts.attr, |
1599 | &bus_attr_poll_timeout.attr, |
1600 | &bus_attr_ap_max_domain_id.attr, |
1601 | &bus_attr_ap_max_adapter_id.attr, |
1602 | &bus_attr_apmask.attr, |
1603 | &bus_attr_aqmask.attr, |
1604 | &bus_attr_scans.attr, |
1605 | &bus_attr_bindings.attr, |
1606 | &bus_attr_features.attr, |
1607 | NULL, |
1608 | }; |
1609 | ATTRIBUTE_GROUPS(ap_bus); |
1610 | |
1611 | static struct bus_type ap_bus_type = { |
1612 | .name = "ap" , |
1613 | .bus_groups = ap_bus_groups, |
1614 | .match = &ap_bus_match, |
1615 | .uevent = &ap_uevent, |
1616 | .probe = ap_device_probe, |
1617 | .remove = ap_device_remove, |
1618 | }; |
1619 | |
1620 | /** |
1621 | * ap_select_domain(): Select an AP domain if possible and we haven't |
1622 | * already done so before. |
1623 | */ |
1624 | static void ap_select_domain(void) |
1625 | { |
1626 | struct ap_queue_status status; |
1627 | int card, dom; |
1628 | |
1629 | /* |
1630 | * Choose the default domain. Either the one specified with |
1631 | * the "domain=" parameter or the first domain with at least |
1632 | * one valid APQN. |
1633 | */ |
1634 | spin_lock_bh(lock: &ap_domain_lock); |
1635 | if (ap_domain_index >= 0) { |
1636 | /* Domain has already been selected. */ |
1637 | goto out; |
1638 | } |
1639 | for (dom = 0; dom <= ap_max_domain_id; dom++) { |
1640 | if (!ap_test_config_usage_domain(dom) || |
1641 | !test_bit_inv(dom, ap_perms.aqm)) |
1642 | continue; |
1643 | for (card = 0; card <= ap_max_adapter_id; card++) { |
1644 | if (!ap_test_config_card_id(id: card) || |
1645 | !test_bit_inv(card, ap_perms.apm)) |
1646 | continue; |
1647 | status = ap_test_queue(AP_MKQID(card, dom), |
1648 | ap_apft_available(), |
1649 | NULL); |
1650 | if (status.response_code == AP_RESPONSE_NORMAL) |
1651 | break; |
1652 | } |
1653 | if (card <= ap_max_adapter_id) |
1654 | break; |
1655 | } |
1656 | if (dom <= ap_max_domain_id) { |
1657 | ap_domain_index = dom; |
1658 | AP_DBF_INFO("%s new default domain is %d\n" , |
1659 | __func__, ap_domain_index); |
1660 | } |
1661 | out: |
1662 | spin_unlock_bh(lock: &ap_domain_lock); |
1663 | } |
1664 | |
1665 | /* |
1666 | * This function checks the type and returns either 0 for not |
1667 | * supported or the highest compatible type value (which may |
1668 | * include the input type value). |
1669 | */ |
1670 | static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func) |
1671 | { |
1672 | int comp_type = 0; |
1673 | |
1674 | /* < CEX4 is not supported */ |
1675 | if (rawtype < AP_DEVICE_TYPE_CEX4) { |
1676 | AP_DBF_WARN("%s queue=%02x.%04x unsupported type %d\n" , |
1677 | __func__, AP_QID_CARD(qid), |
1678 | AP_QID_QUEUE(qid), rawtype); |
1679 | return 0; |
1680 | } |
1681 | /* up to CEX8 known and fully supported */ |
1682 | if (rawtype <= AP_DEVICE_TYPE_CEX8) |
1683 | return rawtype; |
1684 | /* |
1685 | * unknown new type > CEX8, check for compatibility |
1686 | * to the highest known and supported type which is |
1687 | * currently CEX8 with the help of the QACT function. |
1688 | */ |
1689 | if (ap_qact_available()) { |
1690 | struct ap_queue_status status; |
1691 | union ap_qact_ap_info apinfo = {0}; |
1692 | |
1693 | apinfo.mode = (func >> 26) & 0x07; |
1694 | apinfo.cat = AP_DEVICE_TYPE_CEX8; |
1695 | status = ap_qact(qid, 0, &apinfo); |
1696 | if (status.response_code == AP_RESPONSE_NORMAL && |
1697 | apinfo.cat >= AP_DEVICE_TYPE_CEX4 && |
1698 | apinfo.cat <= AP_DEVICE_TYPE_CEX8) |
1699 | comp_type = apinfo.cat; |
1700 | } |
1701 | if (!comp_type) |
1702 | AP_DBF_WARN("%s queue=%02x.%04x unable to map type %d\n" , |
1703 | __func__, AP_QID_CARD(qid), |
1704 | AP_QID_QUEUE(qid), rawtype); |
1705 | else if (comp_type != rawtype) |
1706 | AP_DBF_INFO("%s queue=%02x.%04x map type %d to %d\n" , |
1707 | __func__, AP_QID_CARD(qid), AP_QID_QUEUE(qid), |
1708 | rawtype, comp_type); |
1709 | return comp_type; |
1710 | } |
1711 | |
1712 | /* |
1713 | * Helper function to be used with bus_find_dev |
1714 | * matches for the card device with the given id |
1715 | */ |
1716 | static int __match_card_device_with_id(struct device *dev, const void *data) |
1717 | { |
1718 | return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long)(void *)data; |
1719 | } |
1720 | |
1721 | /* |
1722 | * Helper function to be used with bus_find_dev |
1723 | * matches for the queue device with a given qid |
1724 | */ |
1725 | static int __match_queue_device_with_qid(struct device *dev, const void *data) |
1726 | { |
1727 | return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long)data; |
1728 | } |
1729 | |
1730 | /* |
1731 | * Helper function to be used with bus_find_dev |
1732 | * matches any queue device with given queue id |
1733 | */ |
1734 | static int __match_queue_device_with_queue_id(struct device *dev, const void *data) |
1735 | { |
1736 | return is_queue_dev(dev) && |
1737 | AP_QID_QUEUE(to_ap_queue(dev)->qid) == (int)(long)data; |
1738 | } |
1739 | |
1740 | /* Helper function for notify_config_changed */ |
1741 | static int __drv_notify_config_changed(struct device_driver *drv, void *data) |
1742 | { |
1743 | struct ap_driver *ap_drv = to_ap_drv(drv); |
1744 | |
1745 | if (try_module_get(module: drv->owner)) { |
1746 | if (ap_drv->on_config_changed) |
1747 | ap_drv->on_config_changed(ap_qci_info, ap_qci_info_old); |
1748 | module_put(module: drv->owner); |
1749 | } |
1750 | |
1751 | return 0; |
1752 | } |
1753 | |
1754 | /* Notify all drivers about an qci config change */ |
1755 | static inline void notify_config_changed(void) |
1756 | { |
1757 | bus_for_each_drv(bus: &ap_bus_type, NULL, NULL, |
1758 | fn: __drv_notify_config_changed); |
1759 | } |
1760 | |
1761 | /* Helper function for notify_scan_complete */ |
1762 | static int __drv_notify_scan_complete(struct device_driver *drv, void *data) |
1763 | { |
1764 | struct ap_driver *ap_drv = to_ap_drv(drv); |
1765 | |
1766 | if (try_module_get(module: drv->owner)) { |
1767 | if (ap_drv->on_scan_complete) |
1768 | ap_drv->on_scan_complete(ap_qci_info, |
1769 | ap_qci_info_old); |
1770 | module_put(module: drv->owner); |
1771 | } |
1772 | |
1773 | return 0; |
1774 | } |
1775 | |
1776 | /* Notify all drivers about bus scan complete */ |
1777 | static inline void notify_scan_complete(void) |
1778 | { |
1779 | bus_for_each_drv(bus: &ap_bus_type, NULL, NULL, |
1780 | fn: __drv_notify_scan_complete); |
1781 | } |
1782 | |
1783 | /* |
1784 | * Helper function for ap_scan_bus(). |
1785 | * Remove card device and associated queue devices. |
1786 | */ |
1787 | static inline void ap_scan_rm_card_dev_and_queue_devs(struct ap_card *ac) |
1788 | { |
1789 | bus_for_each_dev(bus: &ap_bus_type, NULL, |
1790 | data: (void *)(long)ac->id, |
1791 | fn: __ap_queue_devices_with_id_unregister); |
1792 | device_unregister(dev: &ac->ap_dev.device); |
1793 | } |
1794 | |
1795 | /* |
1796 | * Helper function for ap_scan_bus(). |
1797 | * Does the scan bus job for all the domains within |
1798 | * a valid adapter given by an ap_card ptr. |
1799 | */ |
1800 | static inline void ap_scan_domains(struct ap_card *ac) |
1801 | { |
1802 | int rc, dom, depth, type, ml; |
1803 | bool decfg, chkstop; |
1804 | struct ap_queue *aq; |
1805 | struct device *dev; |
1806 | unsigned int func; |
1807 | ap_qid_t qid; |
1808 | |
1809 | /* |
1810 | * Go through the configuration for the domains and compare them |
1811 | * to the existing queue devices. Also take care of the config |
1812 | * and error state for the queue devices. |
1813 | */ |
1814 | |
1815 | for (dom = 0; dom <= ap_max_domain_id; dom++) { |
1816 | qid = AP_MKQID(ac->id, dom); |
1817 | dev = bus_find_device(&ap_bus_type, NULL, |
1818 | (void *)(long)qid, |
1819 | __match_queue_device_with_qid); |
1820 | aq = dev ? to_ap_queue(dev) : NULL; |
1821 | if (!ap_test_config_usage_domain(dom)) { |
1822 | if (dev) { |
1823 | AP_DBF_INFO("%s(%d,%d) not in config anymore, rm queue dev\n" , |
1824 | __func__, ac->id, dom); |
1825 | device_unregister(dev); |
1826 | } |
1827 | goto put_dev_and_continue; |
1828 | } |
1829 | /* domain is valid, get info from this APQN */ |
1830 | rc = ap_queue_info(qid, &type, &func, &depth, |
1831 | &ml, &decfg, &chkstop); |
1832 | switch (rc) { |
1833 | case -1: |
1834 | if (dev) { |
1835 | AP_DBF_INFO("%s(%d,%d) queue_info() failed, rm queue dev\n" , |
1836 | __func__, ac->id, dom); |
1837 | device_unregister(dev); |
1838 | } |
1839 | fallthrough; |
1840 | case 0: |
1841 | goto put_dev_and_continue; |
1842 | default: |
1843 | break; |
1844 | } |
1845 | /* if no queue device exists, create a new one */ |
1846 | if (!aq) { |
1847 | aq = ap_queue_create(qid, ac->ap_dev.device_type); |
1848 | if (!aq) { |
1849 | AP_DBF_WARN("%s(%d,%d) ap_queue_create() failed\n" , |
1850 | __func__, ac->id, dom); |
1851 | continue; |
1852 | } |
1853 | aq->card = ac; |
1854 | aq->config = !decfg; |
1855 | aq->chkstop = chkstop; |
1856 | dev = &aq->ap_dev.device; |
1857 | dev->bus = &ap_bus_type; |
1858 | dev->parent = &ac->ap_dev.device; |
1859 | dev_set_name(dev, name: "%02x.%04x" , ac->id, dom); |
1860 | /* register queue device */ |
1861 | rc = device_register(dev); |
1862 | if (rc) { |
1863 | AP_DBF_WARN("%s(%d,%d) device_register() failed\n" , |
1864 | __func__, ac->id, dom); |
1865 | goto put_dev_and_continue; |
1866 | } |
1867 | /* get it and thus adjust reference counter */ |
1868 | get_device(dev); |
1869 | if (decfg) { |
1870 | AP_DBF_INFO("%s(%d,%d) new (decfg) queue dev created\n" , |
1871 | __func__, ac->id, dom); |
1872 | } else if (chkstop) { |
1873 | AP_DBF_INFO("%s(%d,%d) new (chkstop) queue dev created\n" , |
1874 | __func__, ac->id, dom); |
1875 | } else { |
1876 | /* nudge the queue's state machine */ |
1877 | ap_queue_init_state(aq); |
1878 | AP_DBF_INFO("%s(%d,%d) new queue dev created\n" , |
1879 | __func__, ac->id, dom); |
1880 | } |
1881 | goto put_dev_and_continue; |
1882 | } |
1883 | /* handle state changes on already existing queue device */ |
1884 | spin_lock_bh(lock: &aq->lock); |
1885 | /* checkstop state */ |
1886 | if (chkstop && !aq->chkstop) { |
1887 | /* checkstop on */ |
1888 | aq->chkstop = true; |
1889 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { |
1890 | aq->dev_state = AP_DEV_STATE_ERROR; |
1891 | aq->last_err_rc = AP_RESPONSE_CHECKSTOPPED; |
1892 | } |
1893 | spin_unlock_bh(lock: &aq->lock); |
1894 | AP_DBF_DBG("%s(%d,%d) queue dev checkstop on\n" , |
1895 | __func__, ac->id, dom); |
1896 | /* 'receive' pending messages with -EAGAIN */ |
1897 | ap_flush_queue(aq); |
1898 | goto put_dev_and_continue; |
1899 | } else if (!chkstop && aq->chkstop) { |
1900 | /* checkstop off */ |
1901 | aq->chkstop = false; |
1902 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) |
1903 | _ap_queue_init_state(aq); |
1904 | spin_unlock_bh(lock: &aq->lock); |
1905 | AP_DBF_DBG("%s(%d,%d) queue dev checkstop off\n" , |
1906 | __func__, ac->id, dom); |
1907 | goto put_dev_and_continue; |
1908 | } |
1909 | /* config state change */ |
1910 | if (decfg && aq->config) { |
1911 | /* config off this queue device */ |
1912 | aq->config = false; |
1913 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { |
1914 | aq->dev_state = AP_DEV_STATE_ERROR; |
1915 | aq->last_err_rc = AP_RESPONSE_DECONFIGURED; |
1916 | } |
1917 | spin_unlock_bh(lock: &aq->lock); |
1918 | AP_DBF_DBG("%s(%d,%d) queue dev config off\n" , |
1919 | __func__, ac->id, dom); |
1920 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
1921 | /* 'receive' pending messages with -EAGAIN */ |
1922 | ap_flush_queue(aq); |
1923 | goto put_dev_and_continue; |
1924 | } else if (!decfg && !aq->config) { |
1925 | /* config on this queue device */ |
1926 | aq->config = true; |
1927 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) |
1928 | _ap_queue_init_state(aq); |
1929 | spin_unlock_bh(lock: &aq->lock); |
1930 | AP_DBF_DBG("%s(%d,%d) queue dev config on\n" , |
1931 | __func__, ac->id, dom); |
1932 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
1933 | goto put_dev_and_continue; |
1934 | } |
1935 | /* handle other error states */ |
1936 | if (!decfg && aq->dev_state == AP_DEV_STATE_ERROR) { |
1937 | spin_unlock_bh(lock: &aq->lock); |
1938 | /* 'receive' pending messages with -EAGAIN */ |
1939 | ap_flush_queue(aq); |
1940 | /* re-init (with reset) the queue device */ |
1941 | ap_queue_init_state(aq); |
1942 | AP_DBF_INFO("%s(%d,%d) queue dev reinit enforced\n" , |
1943 | __func__, ac->id, dom); |
1944 | goto put_dev_and_continue; |
1945 | } |
1946 | spin_unlock_bh(lock: &aq->lock); |
1947 | put_dev_and_continue: |
1948 | put_device(dev); |
1949 | } |
1950 | } |
1951 | |
1952 | /* |
1953 | * Helper function for ap_scan_bus(). |
1954 | * Does the scan bus job for the given adapter id. |
1955 | */ |
1956 | static inline void ap_scan_adapter(int ap) |
1957 | { |
1958 | int rc, dom, depth, type, comp_type, ml; |
1959 | bool decfg, chkstop; |
1960 | struct ap_card *ac; |
1961 | struct device *dev; |
1962 | unsigned int func; |
1963 | ap_qid_t qid; |
1964 | |
1965 | /* Is there currently a card device for this adapter ? */ |
1966 | dev = bus_find_device(bus: &ap_bus_type, NULL, |
1967 | data: (void *)(long)ap, |
1968 | match: __match_card_device_with_id); |
1969 | ac = dev ? to_ap_card(dev) : NULL; |
1970 | |
1971 | /* Adapter not in configuration ? */ |
1972 | if (!ap_test_config_card_id(id: ap)) { |
1973 | if (ac) { |
1974 | AP_DBF_INFO("%s(%d) ap not in config any more, rm card and queue devs\n" , |
1975 | __func__, ap); |
1976 | ap_scan_rm_card_dev_and_queue_devs(ac); |
1977 | put_device(dev); |
1978 | } |
1979 | return; |
1980 | } |
1981 | |
1982 | /* |
1983 | * Adapter ap is valid in the current configuration. So do some checks: |
1984 | * If no card device exists, build one. If a card device exists, check |
1985 | * for type and functions changed. For all this we need to find a valid |
1986 | * APQN first. |
1987 | */ |
1988 | |
1989 | for (dom = 0; dom <= ap_max_domain_id; dom++) |
1990 | if (ap_test_config_usage_domain(dom)) { |
1991 | qid = AP_MKQID(ap, dom); |
1992 | if (ap_queue_info(qid, &type, &func, &depth, |
1993 | &ml, &decfg, &chkstop) > 0) |
1994 | break; |
1995 | } |
1996 | if (dom > ap_max_domain_id) { |
1997 | /* Could not find one valid APQN for this adapter */ |
1998 | if (ac) { |
1999 | AP_DBF_INFO("%s(%d) no type info (no APQN found), rm card and queue devs\n" , |
2000 | __func__, ap); |
2001 | ap_scan_rm_card_dev_and_queue_devs(ac); |
2002 | put_device(dev); |
2003 | } else { |
2004 | AP_DBF_DBG("%s(%d) no type info (no APQN found), ignored\n" , |
2005 | __func__, ap); |
2006 | } |
2007 | return; |
2008 | } |
2009 | if (!type) { |
2010 | /* No apdater type info available, an unusable adapter */ |
2011 | if (ac) { |
2012 | AP_DBF_INFO("%s(%d) no valid type (0) info, rm card and queue devs\n" , |
2013 | __func__, ap); |
2014 | ap_scan_rm_card_dev_and_queue_devs(ac); |
2015 | put_device(dev); |
2016 | } else { |
2017 | AP_DBF_DBG("%s(%d) no valid type (0) info, ignored\n" , |
2018 | __func__, ap); |
2019 | } |
2020 | return; |
2021 | } |
2022 | if (ac) { |
2023 | /* Check APQN against existing card device for changes */ |
2024 | if (ac->raw_hwtype != type) { |
2025 | AP_DBF_INFO("%s(%d) hwtype %d changed, rm card and queue devs\n" , |
2026 | __func__, ap, type); |
2027 | ap_scan_rm_card_dev_and_queue_devs(ac); |
2028 | put_device(dev); |
2029 | ac = NULL; |
2030 | } else if ((ac->functions & TAPQ_CARD_FUNC_CMP_MASK) != |
2031 | (func & TAPQ_CARD_FUNC_CMP_MASK)) { |
2032 | AP_DBF_INFO("%s(%d) functions 0x%08x changed, rm card and queue devs\n" , |
2033 | __func__, ap, func); |
2034 | ap_scan_rm_card_dev_and_queue_devs(ac); |
2035 | put_device(dev); |
2036 | ac = NULL; |
2037 | } else { |
2038 | /* handle checkstop state change */ |
2039 | if (chkstop && !ac->chkstop) { |
2040 | /* checkstop on */ |
2041 | ac->chkstop = true; |
2042 | AP_DBF_INFO("%s(%d) card dev checkstop on\n" , |
2043 | __func__, ap); |
2044 | } else if (!chkstop && ac->chkstop) { |
2045 | /* checkstop off */ |
2046 | ac->chkstop = false; |
2047 | AP_DBF_INFO("%s(%d) card dev checkstop off\n" , |
2048 | __func__, ap); |
2049 | } |
2050 | /* handle config state change */ |
2051 | if (decfg && ac->config) { |
2052 | ac->config = false; |
2053 | AP_DBF_INFO("%s(%d) card dev config off\n" , |
2054 | __func__, ap); |
2055 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
2056 | } else if (!decfg && !ac->config) { |
2057 | ac->config = true; |
2058 | AP_DBF_INFO("%s(%d) card dev config on\n" , |
2059 | __func__, ap); |
2060 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
2061 | } |
2062 | } |
2063 | } |
2064 | |
2065 | if (!ac) { |
2066 | /* Build a new card device */ |
2067 | comp_type = ap_get_compatible_type(qid, type, func); |
2068 | if (!comp_type) { |
2069 | AP_DBF_WARN("%s(%d) type %d, can't get compatibility type\n" , |
2070 | __func__, ap, type); |
2071 | return; |
2072 | } |
2073 | ac = ap_card_create(id: ap, queue_depth: depth, raw_type: type, comp_type, functions: func, ml); |
2074 | if (!ac) { |
2075 | AP_DBF_WARN("%s(%d) ap_card_create() failed\n" , |
2076 | __func__, ap); |
2077 | return; |
2078 | } |
2079 | ac->config = !decfg; |
2080 | ac->chkstop = chkstop; |
2081 | dev = &ac->ap_dev.device; |
2082 | dev->bus = &ap_bus_type; |
2083 | dev->parent = ap_root_device; |
2084 | dev_set_name(dev, name: "card%02x" , ap); |
2085 | /* maybe enlarge ap_max_msg_size to support this card */ |
2086 | if (ac->maxmsgsize > atomic_read(v: &ap_max_msg_size)) { |
2087 | atomic_set(v: &ap_max_msg_size, i: ac->maxmsgsize); |
2088 | AP_DBF_INFO("%s(%d) ap_max_msg_size update to %d byte\n" , |
2089 | __func__, ap, |
2090 | atomic_read(&ap_max_msg_size)); |
2091 | } |
2092 | /* Register the new card device with AP bus */ |
2093 | rc = device_register(dev); |
2094 | if (rc) { |
2095 | AP_DBF_WARN("%s(%d) device_register() failed\n" , |
2096 | __func__, ap); |
2097 | put_device(dev); |
2098 | return; |
2099 | } |
2100 | /* get it and thus adjust reference counter */ |
2101 | get_device(dev); |
2102 | if (decfg) |
2103 | AP_DBF_INFO("%s(%d) new (decfg) card dev type=%d func=0x%08x created\n" , |
2104 | __func__, ap, type, func); |
2105 | else if (chkstop) |
2106 | AP_DBF_INFO("%s(%d) new (chkstop) card dev type=%d func=0x%08x created\n" , |
2107 | __func__, ap, type, func); |
2108 | else |
2109 | AP_DBF_INFO("%s(%d) new card dev type=%d func=0x%08x created\n" , |
2110 | __func__, ap, type, func); |
2111 | } |
2112 | |
2113 | /* Verify the domains and the queue devices for this card */ |
2114 | ap_scan_domains(ac); |
2115 | |
2116 | /* release the card device */ |
2117 | put_device(dev: &ac->ap_dev.device); |
2118 | } |
2119 | |
2120 | /** |
2121 | * ap_get_configuration - get the host AP configuration |
2122 | * |
2123 | * Stores the host AP configuration information returned from the previous call |
2124 | * to Query Configuration Information (QCI), then retrieves and stores the |
2125 | * current AP configuration returned from QCI. |
2126 | * |
2127 | * Return: true if the host AP configuration changed between calls to QCI; |
2128 | * otherwise, return false. |
2129 | */ |
2130 | static bool ap_get_configuration(void) |
2131 | { |
2132 | if (!ap_qci_info) /* QCI not supported */ |
2133 | return false; |
2134 | |
2135 | memcpy(ap_qci_info_old, ap_qci_info, sizeof(*ap_qci_info)); |
2136 | ap_fetch_qci_info(info: ap_qci_info); |
2137 | |
2138 | return memcmp(ap_qci_info, ap_qci_info_old, |
2139 | sizeof(struct ap_config_info)) != 0; |
2140 | } |
2141 | |
2142 | /** |
2143 | * ap_scan_bus(): Scan the AP bus for new devices |
2144 | * Runs periodically, workqueue timer (ap_config_time) |
2145 | * @unused: Unused pointer. |
2146 | */ |
2147 | static void ap_scan_bus(struct work_struct *unused) |
2148 | { |
2149 | int ap, config_changed = 0; |
2150 | |
2151 | /* config change notify */ |
2152 | config_changed = ap_get_configuration(); |
2153 | if (config_changed) |
2154 | notify_config_changed(); |
2155 | ap_select_domain(); |
2156 | |
2157 | AP_DBF_DBG("%s running\n" , __func__); |
2158 | |
2159 | /* loop over all possible adapters */ |
2160 | for (ap = 0; ap <= ap_max_adapter_id; ap++) |
2161 | ap_scan_adapter(ap); |
2162 | |
2163 | /* scan complete notify */ |
2164 | if (config_changed) |
2165 | notify_scan_complete(); |
2166 | |
2167 | /* check if there is at least one queue available with default domain */ |
2168 | if (ap_domain_index >= 0) { |
2169 | struct device *dev = |
2170 | bus_find_device(bus: &ap_bus_type, NULL, |
2171 | data: (void *)(long)ap_domain_index, |
2172 | match: __match_queue_device_with_queue_id); |
2173 | if (dev) |
2174 | put_device(dev); |
2175 | else |
2176 | AP_DBF_INFO("%s no queue device with default domain %d available\n" , |
2177 | __func__, ap_domain_index); |
2178 | } |
2179 | |
2180 | if (atomic64_inc_return(v: &ap_scan_bus_count) == 1) { |
2181 | AP_DBF_DBG("%s init scan complete\n" , __func__); |
2182 | ap_send_init_scan_done_uevent(); |
2183 | ap_check_bindings_complete(); |
2184 | } |
2185 | |
2186 | mod_timer(timer: &ap_config_timer, expires: jiffies + ap_config_time * HZ); |
2187 | } |
2188 | |
2189 | static void ap_config_timeout(struct timer_list *unused) |
2190 | { |
2191 | queue_work(wq: system_long_wq, work: &ap_scan_work); |
2192 | } |
2193 | |
2194 | static int __init ap_debug_init(void) |
2195 | { |
2196 | ap_dbf_info = debug_register("ap" , 2, 1, |
2197 | DBF_MAX_SPRINTF_ARGS * sizeof(long)); |
2198 | debug_register_view(ap_dbf_info, &debug_sprintf_view); |
2199 | debug_set_level(ap_dbf_info, DBF_ERR); |
2200 | |
2201 | return 0; |
2202 | } |
2203 | |
2204 | static void __init ap_perms_init(void) |
2205 | { |
2206 | /* all resources usable if no kernel parameter string given */ |
2207 | memset(&ap_perms.ioctlm, 0xFF, sizeof(ap_perms.ioctlm)); |
2208 | memset(&ap_perms.apm, 0xFF, sizeof(ap_perms.apm)); |
2209 | memset(&ap_perms.aqm, 0xFF, sizeof(ap_perms.aqm)); |
2210 | |
2211 | /* apm kernel parameter string */ |
2212 | if (apm_str) { |
2213 | memset(&ap_perms.apm, 0, sizeof(ap_perms.apm)); |
2214 | ap_parse_mask_str(apm_str, ap_perms.apm, AP_DEVICES, |
2215 | &ap_perms_mutex); |
2216 | } |
2217 | |
2218 | /* aqm kernel parameter string */ |
2219 | if (aqm_str) { |
2220 | memset(&ap_perms.aqm, 0, sizeof(ap_perms.aqm)); |
2221 | ap_parse_mask_str(aqm_str, ap_perms.aqm, AP_DOMAINS, |
2222 | &ap_perms_mutex); |
2223 | } |
2224 | } |
2225 | |
2226 | /** |
2227 | * ap_module_init(): The module initialization code. |
2228 | * |
2229 | * Initializes the module. |
2230 | */ |
2231 | static int __init ap_module_init(void) |
2232 | { |
2233 | int rc; |
2234 | |
2235 | rc = ap_debug_init(); |
2236 | if (rc) |
2237 | return rc; |
2238 | |
2239 | if (!ap_instructions_available()) { |
2240 | pr_warn("The hardware system does not support AP instructions\n" ); |
2241 | return -ENODEV; |
2242 | } |
2243 | |
2244 | /* init ap_queue hashtable */ |
2245 | hash_init(ap_queues); |
2246 | |
2247 | /* set up the AP permissions (ioctls, ap and aq masks) */ |
2248 | ap_perms_init(); |
2249 | |
2250 | /* Get AP configuration data if available */ |
2251 | ap_init_qci_info(); |
2252 | |
2253 | /* check default domain setting */ |
2254 | if (ap_domain_index < -1 || ap_domain_index > ap_max_domain_id || |
2255 | (ap_domain_index >= 0 && |
2256 | !test_bit_inv(ap_domain_index, ap_perms.aqm))) { |
2257 | pr_warn("%d is not a valid cryptographic domain\n" , |
2258 | ap_domain_index); |
2259 | ap_domain_index = -1; |
2260 | } |
2261 | |
2262 | /* enable interrupts if available */ |
2263 | if (ap_interrupts_available() && ap_useirq) { |
2264 | rc = register_adapter_interrupt(&ap_airq); |
2265 | ap_irq_flag = (rc == 0); |
2266 | } |
2267 | |
2268 | /* Create /sys/bus/ap. */ |
2269 | rc = bus_register(bus: &ap_bus_type); |
2270 | if (rc) |
2271 | goto out; |
2272 | |
2273 | /* Create /sys/devices/ap. */ |
2274 | ap_root_device = root_device_register("ap" ); |
2275 | rc = PTR_ERR_OR_ZERO(ptr: ap_root_device); |
2276 | if (rc) |
2277 | goto out_bus; |
2278 | ap_root_device->bus = &ap_bus_type; |
2279 | |
2280 | /* Setup the AP bus rescan timer. */ |
2281 | timer_setup(&ap_config_timer, ap_config_timeout, 0); |
2282 | |
2283 | /* |
2284 | * Setup the high resolution poll timer. |
2285 | * If we are running under z/VM adjust polling to z/VM polling rate. |
2286 | */ |
2287 | if (MACHINE_IS_VM) |
2288 | poll_high_timeout = 1500000; |
2289 | hrtimer_init(timer: &ap_poll_timer, CLOCK_MONOTONIC, mode: HRTIMER_MODE_ABS); |
2290 | ap_poll_timer.function = ap_poll_timeout; |
2291 | |
2292 | /* Start the low priority AP bus poll thread. */ |
2293 | if (ap_thread_flag) { |
2294 | rc = ap_poll_thread_start(); |
2295 | if (rc) |
2296 | goto out_work; |
2297 | } |
2298 | |
2299 | queue_work(wq: system_long_wq, work: &ap_scan_work); |
2300 | |
2301 | return 0; |
2302 | |
2303 | out_work: |
2304 | hrtimer_cancel(timer: &ap_poll_timer); |
2305 | root_device_unregister(root: ap_root_device); |
2306 | out_bus: |
2307 | bus_unregister(bus: &ap_bus_type); |
2308 | out: |
2309 | if (ap_irq_flag) |
2310 | unregister_adapter_interrupt(&ap_airq); |
2311 | kfree(objp: ap_qci_info); |
2312 | return rc; |
2313 | } |
2314 | device_initcall(ap_module_init); |
2315 | |