Commit | Line | Data |
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812141a9 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1534c382 | 2 | /* |
5ac8c724 | 3 | * Copyright IBM Corp. 2006, 2023 |
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> |
837cd105 | 9 | * Harald Freudenberger <freude@linux.ibm.com> |
1534c382 MS |
10 | * |
11 | * Adjunct processor bus. | |
1534c382 MS |
12 | */ |
13 | ||
136f7a1c MS |
14 | #define KMSG_COMPONENT "ap" |
15 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
16 | ||
62d146ff | 17 | #include <linux/kernel_stat.h> |
50a0d46c | 18 | #include <linux/moduleparam.h> |
1534c382 MS |
19 | #include <linux/init.h> |
20 | #include <linux/delay.h> | |
21 | #include <linux/err.h> | |
41677b1d | 22 | #include <linux/freezer.h> |
1534c382 MS |
23 | #include <linux/interrupt.h> |
24 | #include <linux/workqueue.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
1534c382 MS |
26 | #include <linux/notifier.h> |
27 | #include <linux/kthread.h> | |
28 | #include <linux/mutex.h> | |
cb17a636 | 29 | #include <asm/airq.h> |
d2197485 | 30 | #include <asm/tpi.h> |
60063497 | 31 | #include <linux/atomic.h> |
cb17a636 | 32 | #include <asm/isc.h> |
fe137230 FB |
33 | #include <linux/hrtimer.h> |
34 | #include <linux/ktime.h> | |
a0616cde | 35 | #include <asm/facility.h> |
5d26a105 | 36 | #include <linux/crypto.h> |
e28d2af4 | 37 | #include <linux/mod_devicetable.h> |
cccd85bf | 38 | #include <linux/debugfs.h> |
7e0bdbe5 | 39 | #include <linux/ctype.h> |
4f8206b8 | 40 | #include <linux/module.h> |
d065bdb4 | 41 | #include <asm/uv.h> |
2a483d33 | 42 | #include <asm/chsc.h> |
1534c382 MS |
43 | |
44 | #include "ap_bus.h" | |
cccd85bf | 45 | #include "ap_debug.h" |
1534c382 | 46 | |
12376084 HD |
47 | MODULE_AUTHOR("IBM Corporation"); |
48 | MODULE_DESCRIPTION("Adjunct Processor Bus driver"); | |
49 | MODULE_LICENSE("GPL"); | |
50 | ||
1534c382 | 51 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ |
fc1d3f02 | 52 | static DEFINE_SPINLOCK(ap_domain_lock); |
ac2b96f3 | 53 | module_param_named(domain, ap_domain_index, int, 0440); |
1534c382 MS |
54 | MODULE_PARM_DESC(domain, "domain index for ap devices"); |
55 | EXPORT_SYMBOL(ap_domain_index); | |
56 | ||
ac2b96f3 HF |
57 | static int ap_thread_flag; |
58 | module_param_named(poll_thread, ap_thread_flag, int, 0440); | |
b90b34c6 | 59 | MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)."); |
1534c382 | 60 | |
7e0bdbe5 HF |
61 | static char *apm_str; |
62 | module_param_named(apmask, apm_str, charp, 0440); | |
63 | MODULE_PARM_DESC(apmask, "AP bus adapter mask."); | |
64 | ||
65 | static char *aqm_str; | |
66 | module_param_named(aqmask, aqm_str, charp, 0440); | |
67 | MODULE_PARM_DESC(aqmask, "AP bus domain mask."); | |
68 | ||
d0982725 HF |
69 | static int ap_useirq = 1; |
70 | module_param_named(useirq, ap_useirq, int, 0440); | |
71 | MODULE_PARM_DESC(useirq, "Use interrupt if available, default is 1 (on)."); | |
72 | ||
bd39654a HF |
73 | atomic_t ap_max_msg_size = ATOMIC_INIT(AP_DEFAULT_MAX_MSG_SIZE); |
74 | EXPORT_SYMBOL(ap_max_msg_size); | |
75 | ||
e28d2af4 IT |
76 | static struct device *ap_root_device; |
77 | ||
bc4b295e HF |
78 | /* Hashtable of all queue devices on the AP bus */ |
79 | DEFINE_HASHTABLE(ap_queues, 8); | |
80 | /* lock used for the ap_queues hashtable */ | |
81 | DEFINE_SPINLOCK(ap_queues_lock); | |
e28d2af4 | 82 | |
00fab235 HF |
83 | /* Default permissions (ioctl, card and domain masking) */ |
84 | struct ap_perms ap_perms; | |
85 | EXPORT_SYMBOL(ap_perms); | |
86 | DEFINE_MUTEX(ap_perms_mutex); | |
87 | EXPORT_SYMBOL(ap_perms_mutex); | |
7e0bdbe5 | 88 | |
0677519a HF |
89 | /* # of bindings complete since init */ |
90 | static atomic64_t ap_bindings_complete_count = ATOMIC64_INIT(0); | |
91 | ||
778412ab HF |
92 | /* completion for APQN bindings complete */ |
93 | static DECLARE_COMPLETION(ap_apqn_bindings_complete); | |
837cd105 | 94 | |
8dec9cb9 HD |
95 | static struct ap_config_info qci[2]; |
96 | static struct ap_config_info *const ap_qci_info = &qci[0]; | |
97 | static struct ap_config_info *const ap_qci_info_old = &qci[1]; | |
1534c382 | 98 | |
cccd85bf HF |
99 | /* |
100 | * AP bus related debug feature things. | |
101 | */ | |
cccd85bf HF |
102 | debug_info_t *ap_dbf_info; |
103 | ||
1749a81d | 104 | /* |
99b3126e | 105 | * AP bus rescan related things. |
1534c382 | 106 | */ |
eacf5b36 HF |
107 | static bool ap_scan_bus(void); |
108 | static bool ap_scan_bus_result; /* result of last ap_scan_bus() */ | |
109 | static DEFINE_MUTEX(ap_scan_bus_mutex); /* mutex ap_scan_bus() invocations */ | |
99b3126e HF |
110 | static atomic64_t ap_scan_bus_count; /* counter ap_scan_bus() invocations */ |
111 | static int ap_scan_bus_time = AP_CONFIG_TIME; | |
112 | static struct timer_list ap_scan_bus_timer; | |
b5caf05e HF |
113 | static void ap_scan_bus_wq_callback(struct work_struct *); |
114 | static DECLARE_WORK(ap_scan_bus_work, ap_scan_bus_wq_callback); | |
1534c382 | 115 | |
1749a81d | 116 | /* |
cb17a636 | 117 | * Tasklet & timer for AP request polling and interrupts |
1534c382 | 118 | */ |
3f3007af | 119 | static void ap_tasklet_fn(unsigned long); |
b13fecb1 | 120 | static DECLARE_TASKLET_OLD(ap_tasklet, ap_tasklet_fn); |
1534c382 | 121 | static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait); |
ac2b96f3 | 122 | static struct task_struct *ap_poll_kthread; |
1534c382 | 123 | static DEFINE_MUTEX(ap_poll_thread_mutex); |
93521314 | 124 | static DEFINE_SPINLOCK(ap_poll_timer_lock); |
fe137230 | 125 | static struct hrtimer ap_poll_timer; |
ac2b96f3 HF |
126 | /* |
127 | * In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds. | |
128 | * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling. | |
129 | */ | |
263c8454 HF |
130 | static unsigned long poll_high_timeout = 250000UL; |
131 | ||
132 | /* | |
133 | * Some state machine states only require a low frequency polling. | |
134 | * We use 25 Hz frequency for these. | |
135 | */ | |
136 | static unsigned long poll_low_timeout = 40000000UL; | |
1534c382 | 137 | |
c8337c47 HF |
138 | /* Maximum domain id, if not given via qci */ |
139 | static int ap_max_domain_id = 15; | |
140 | /* Maximum adapter id, if not given via qci */ | |
141 | static int ap_max_adapter_id = 63; | |
41677b1d | 142 | |
5b431787 | 143 | static const struct bus_type ap_bus_type; |
772f5472 | 144 | |
f4eae94f | 145 | /* Adapter interrupt definitions */ |
d2197485 MR |
146 | static void ap_interrupt_handler(struct airq_struct *airq, |
147 | struct tpi_info *tpi_info); | |
3f3007af | 148 | |
cabebb69 | 149 | static bool ap_irq_flag; |
f4eae94f MS |
150 | |
151 | static struct airq_struct ap_airq = { | |
152 | .handler = ap_interrupt_handler, | |
153 | .isc = AP_ISC, | |
154 | }; | |
155 | ||
e28d2af4 IT |
156 | /** |
157 | * ap_airq_ptr() - Get the address of the adapter interrupt indicator | |
158 | * | |
159 | * Returns the address of the local-summary-indicator of the adapter | |
160 | * interrupt handler for AP, or NULL if adapter interrupts are not | |
161 | * available. | |
162 | */ | |
163 | void *ap_airq_ptr(void) | |
164 | { | |
cabebb69 | 165 | if (ap_irq_flag) |
e28d2af4 IT |
166 | return ap_airq.lsi_ptr; |
167 | return NULL; | |
168 | } | |
169 | ||
cb17a636 FB |
170 | /** |
171 | * ap_interrupts_available(): Test if AP interrupts are available. | |
172 | * | |
173 | * Returns 1 if AP interrupts are available. | |
174 | */ | |
175 | static int ap_interrupts_available(void) | |
176 | { | |
86cd741b | 177 | return test_facility(65); |
cb17a636 FB |
178 | } |
179 | ||
75014550 | 180 | /** |
c8337c47 HF |
181 | * ap_qci_available(): Test if AP configuration |
182 | * information can be queried via QCI subfunction. | |
75014550 | 183 | * |
c8337c47 | 184 | * Returns 1 if subfunction PQAP(QCI) is available. |
75014550 | 185 | */ |
c8337c47 | 186 | static int ap_qci_available(void) |
75014550 | 187 | { |
86cd741b | 188 | return test_facility(12); |
75014550 HD |
189 | } |
190 | ||
e7fc5146 TK |
191 | /** |
192 | * ap_apft_available(): Test if AP facilities test (APFT) | |
193 | * facility is available. | |
194 | * | |
2004b57c | 195 | * Returns 1 if APFT is available. |
e7fc5146 TK |
196 | */ |
197 | static int ap_apft_available(void) | |
198 | { | |
199 | return test_facility(15); | |
200 | } | |
201 | ||
9a564108 HF |
202 | /* |
203 | * ap_qact_available(): Test if the PQAP(QACT) subfunction is available. | |
204 | * | |
205 | * Returns 1 if the QACT subfunction is available. | |
206 | */ | |
207 | static inline int ap_qact_available(void) | |
208 | { | |
8dec9cb9 | 209 | return ap_qci_info->qact; |
9a564108 HF |
210 | } |
211 | ||
f6047040 HF |
212 | /* |
213 | * ap_sb_available(): Test if the AP secure binding facility is available. | |
214 | * | |
215 | * Returns 1 if secure binding facility is available. | |
216 | */ | |
217 | int ap_sb_available(void) | |
218 | { | |
8dec9cb9 | 219 | return ap_qci_info->apsb; |
f6047040 HF |
220 | } |
221 | ||
386cb81e HD |
222 | /* |
223 | * ap_is_se_guest(): Check for SE guest with AP pass-through support. | |
224 | */ | |
225 | bool ap_is_se_guest(void) | |
226 | { | |
227 | return is_prot_virt_guest() && ap_sb_available(); | |
228 | } | |
229 | EXPORT_SYMBOL(ap_is_se_guest); | |
230 | ||
889875a1 | 231 | /** |
c8337c47 HF |
232 | * ap_init_qci_info(): Allocate and query qci config info. |
233 | * Does also update the static variables ap_max_domain_id | |
234 | * and ap_max_adapter_id if this info is available. | |
889875a1 | 235 | */ |
c8337c47 | 236 | static void __init ap_init_qci_info(void) |
889875a1 | 237 | { |
8dec9cb9 HD |
238 | if (!ap_qci_available() || |
239 | ap_qci(ap_qci_info)) { | |
2ea2a609 | 240 | AP_DBF_INFO("%s QCI not supported\n", __func__); |
889875a1 | 241 | return; |
c8337c47 | 242 | } |
8dec9cb9 | 243 | memcpy(ap_qci_info_old, ap_qci_info, sizeof(*ap_qci_info)); |
2ea2a609 | 244 | AP_DBF_INFO("%s successful fetched initial qci info\n", __func__); |
c8337c47 HF |
245 | |
246 | if (ap_qci_info->apxa) { | |
f6047040 HF |
247 | if (ap_qci_info->na) { |
248 | ap_max_adapter_id = ap_qci_info->na; | |
2ea2a609 HF |
249 | AP_DBF_INFO("%s new ap_max_adapter_id is %d\n", |
250 | __func__, ap_max_adapter_id); | |
c8337c47 | 251 | } |
f6047040 HF |
252 | if (ap_qci_info->nd) { |
253 | ap_max_domain_id = ap_qci_info->nd; | |
2ea2a609 HF |
254 | AP_DBF_INFO("%s new ap_max_domain_id is %d\n", |
255 | __func__, ap_max_domain_id); | |
c8337c47 HF |
256 | } |
257 | } | |
889875a1 MS |
258 | } |
259 | ||
260 | /* | |
261 | * ap_test_config(): helper function to extract the nrth bit | |
262 | * within the unsigned int array field. | |
263 | */ | |
264 | static inline int ap_test_config(unsigned int *field, unsigned int nr) | |
265 | { | |
266 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
267 | } | |
268 | ||
269 | /* | |
270 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
889875a1 MS |
271 | * |
272 | * Returns 0 if the card is not configured | |
273 | * 1 if the card is configured or | |
274 | * if the configuration information is not available | |
275 | */ | |
276 | static inline int ap_test_config_card_id(unsigned int id) | |
277 | { | |
c8337c47 HF |
278 | if (id > ap_max_adapter_id) |
279 | return 0; | |
8dec9cb9 | 280 | if (ap_qci_info->flags) |
c8337c47 HF |
281 | return ap_test_config(ap_qci_info->apm, id); |
282 | return 1; | |
889875a1 MS |
283 | } |
284 | ||
285 | /* | |
7379e652 HF |
286 | * ap_test_config_usage_domain(): Test, whether an AP usage domain |
287 | * is configured. | |
889875a1 MS |
288 | * |
289 | * Returns 0 if the usage domain is not configured | |
290 | * 1 if the usage domain is configured or | |
291 | * if the configuration information is not available | |
292 | */ | |
7379e652 | 293 | int ap_test_config_usage_domain(unsigned int domain) |
889875a1 | 294 | { |
c8337c47 HF |
295 | if (domain > ap_max_domain_id) |
296 | return 0; | |
8dec9cb9 | 297 | if (ap_qci_info->flags) |
c8337c47 HF |
298 | return ap_test_config(ap_qci_info->aqm, domain); |
299 | return 1; | |
889875a1 | 300 | } |
7379e652 HF |
301 | EXPORT_SYMBOL(ap_test_config_usage_domain); |
302 | ||
303 | /* | |
304 | * ap_test_config_ctrl_domain(): Test, whether an AP control domain | |
305 | * is configured. | |
306 | * @domain AP control domain ID | |
307 | * | |
308 | * Returns 1 if the control domain is configured | |
309 | * 0 in all other cases | |
310 | */ | |
311 | int ap_test_config_ctrl_domain(unsigned int domain) | |
312 | { | |
c8337c47 | 313 | if (!ap_qci_info || domain > ap_max_domain_id) |
7379e652 | 314 | return 0; |
c8337c47 | 315 | return ap_test_config(ap_qci_info->adm, domain); |
7379e652 HF |
316 | } |
317 | EXPORT_SYMBOL(ap_test_config_ctrl_domain); | |
889875a1 | 318 | |
c8337c47 HF |
319 | /* |
320 | * ap_queue_info(): Check and get AP queue info. | |
038c5bed | 321 | * Returns: 1 if APQN exists and info is filled, |
5cf1a563 | 322 | * 0 if APQN seems to exist but there is no info |
038c5bed HF |
323 | * available (eg. caused by an asynch pending error) |
324 | * -1 invalid APQN, TAPQ error or AP queue status which | |
325 | * indicates there is no APQN. | |
1534c382 | 326 | */ |
d4c53ae8 HF |
327 | static int ap_queue_info(ap_qid_t qid, struct ap_tapq_hwinfo *hwinfo, |
328 | bool *decfg, bool *cstop) | |
1534c382 MS |
329 | { |
330 | struct ap_queue_status status; | |
bd39654a | 331 | |
d4c53ae8 | 332 | hwinfo->value = 0; |
889875a1 | 333 | |
c8337c47 HF |
334 | /* make sure we don't run into a specifiation exception */ |
335 | if (AP_QID_CARD(qid) > ap_max_adapter_id || | |
336 | AP_QID_QUEUE(qid) > ap_max_domain_id) | |
038c5bed | 337 | return -1; |
1534c382 | 338 | |
c8337c47 | 339 | /* call TAPQ on this APQN */ |
d4c53ae8 | 340 | status = ap_test_queue(qid, ap_apft_available(), hwinfo); |
038c5bed | 341 | |
c50a160c IT |
342 | switch (status.response_code) { |
343 | case AP_RESPONSE_NORMAL: | |
c8337c47 | 344 | case AP_RESPONSE_RESET_IN_PROGRESS: |
4f2fcccd HF |
345 | case AP_RESPONSE_DECONFIGURED: |
346 | case AP_RESPONSE_CHECKSTOPPED: | |
347 | case AP_RESPONSE_BUSY: | |
5cf1a563 HF |
348 | /* For all these RCs the tapq info should be available */ |
349 | break; | |
c50a160c | 350 | default: |
5cf1a563 HF |
351 | /* On a pending async error the info should be available */ |
352 | if (!status.async) | |
353 | return -1; | |
354 | break; | |
1534c382 | 355 | } |
5cf1a563 HF |
356 | |
357 | /* There should be at least one of the mode bits set */ | |
d4c53ae8 | 358 | if (WARN_ON_ONCE(!hwinfo->value)) |
5cf1a563 HF |
359 | return 0; |
360 | ||
d4c53ae8 HF |
361 | *decfg = status.response_code == AP_RESPONSE_DECONFIGURED; |
362 | *cstop = status.response_code == AP_RESPONSE_CHECKSTOPPED; | |
5cf1a563 HF |
363 | |
364 | return 1; | |
1534c382 MS |
365 | } |
366 | ||
dc4b6ded | 367 | void ap_wait(enum ap_sm_wait wait) |
3f3007af MS |
368 | { |
369 | ktime_t hr_time; | |
370 | ||
371 | switch (wait) { | |
dc4b6ded HF |
372 | case AP_SM_WAIT_AGAIN: |
373 | case AP_SM_WAIT_INTERRUPT: | |
cabebb69 | 374 | if (ap_irq_flag) |
3f3007af MS |
375 | break; |
376 | if (ap_poll_kthread) { | |
377 | wake_up(&ap_poll_wait); | |
378 | break; | |
379 | } | |
fcf0220a | 380 | fallthrough; |
263c8454 HF |
381 | case AP_SM_WAIT_LOW_TIMEOUT: |
382 | case AP_SM_WAIT_HIGH_TIMEOUT: | |
3f3007af MS |
383 | spin_lock_bh(&ap_poll_timer_lock); |
384 | if (!hrtimer_is_queued(&ap_poll_timer)) { | |
263c8454 HF |
385 | hr_time = |
386 | wait == AP_SM_WAIT_LOW_TIMEOUT ? | |
387 | poll_low_timeout : poll_high_timeout; | |
3f3007af MS |
388 | hrtimer_forward_now(&ap_poll_timer, hr_time); |
389 | hrtimer_restart(&ap_poll_timer); | |
390 | } | |
391 | spin_unlock_bh(&ap_poll_timer_lock); | |
392 | break; | |
dc4b6ded | 393 | case AP_SM_WAIT_NONE: |
3f3007af MS |
394 | default: |
395 | break; | |
396 | } | |
397 | } | |
398 | ||
3f3007af MS |
399 | /** |
400 | * ap_request_timeout(): Handling of request timeouts | |
cefbeb5d | 401 | * @t: timer making this callback |
3f3007af MS |
402 | * |
403 | * Handles request timeouts. | |
404 | */ | |
cefbeb5d | 405 | void ap_request_timeout(struct timer_list *t) |
3f3007af | 406 | { |
cefbeb5d | 407 | struct ap_queue *aq = from_timer(aq, t, timeout); |
3f3007af | 408 | |
e28d2af4 | 409 | spin_lock_bh(&aq->lock); |
dc4b6ded | 410 | ap_wait(ap_sm_event(aq, AP_SM_EVENT_TIMEOUT)); |
e28d2af4 | 411 | spin_unlock_bh(&aq->lock); |
3f3007af MS |
412 | } |
413 | ||
414 | /** | |
415 | * ap_poll_timeout(): AP receive polling for finished AP requests. | |
416 | * @unused: Unused pointer. | |
417 | * | |
418 | * Schedules the AP tasklet using a high resolution timer. | |
419 | */ | |
420 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) | |
421 | { | |
41677b1d | 422 | tasklet_schedule(&ap_tasklet); |
3f3007af MS |
423 | return HRTIMER_NORESTART; |
424 | } | |
425 | ||
426 | /** | |
427 | * ap_interrupt_handler() - Schedule ap_tasklet on interrupt | |
428 | * @airq: pointer to adapter interrupt descriptor | |
d2197485 | 429 | * @tpi_info: ignored |
3f3007af | 430 | */ |
d2197485 MR |
431 | static void ap_interrupt_handler(struct airq_struct *airq, |
432 | struct tpi_info *tpi_info) | |
3f3007af MS |
433 | { |
434 | inc_irq_stat(IRQIO_APB); | |
41677b1d | 435 | tasklet_schedule(&ap_tasklet); |
3f3007af MS |
436 | } |
437 | ||
438 | /** | |
439 | * ap_tasklet_fn(): Tasklet to poll all AP devices. | |
440 | * @dummy: Unused variable | |
441 | * | |
442 | * Poll all AP devices on the bus. | |
443 | */ | |
444 | static void ap_tasklet_fn(unsigned long dummy) | |
445 | { | |
bc4b295e | 446 | int bkt; |
e28d2af4 | 447 | struct ap_queue *aq; |
dc4b6ded | 448 | enum ap_sm_wait wait = AP_SM_WAIT_NONE; |
3f3007af MS |
449 | |
450 | /* Reset the indicator if interrupts are used. Thus new interrupts can | |
cada938a | 451 | * be received. Doing it in the beginning of the tasklet is therefore |
3f3007af MS |
452 | * important that no requests on any AP get lost. |
453 | */ | |
cabebb69 | 454 | if (ap_irq_flag) |
3f3007af MS |
455 | xchg(ap_airq.lsi_ptr, 0); |
456 | ||
bc4b295e HF |
457 | spin_lock_bh(&ap_queues_lock); |
458 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
459 | spin_lock_bh(&aq->lock); | |
dc4b6ded | 460 | wait = min(wait, ap_sm_event_loop(aq, AP_SM_EVENT_POLL)); |
bc4b295e | 461 | spin_unlock_bh(&aq->lock); |
3f3007af | 462 | } |
bc4b295e | 463 | spin_unlock_bh(&ap_queues_lock); |
e28d2af4 IT |
464 | |
465 | ap_wait(wait); | |
af512ed0 RW |
466 | } |
467 | ||
9af3e04e MS |
468 | static int ap_pending_requests(void) |
469 | { | |
bc4b295e | 470 | int bkt; |
e28d2af4 IT |
471 | struct ap_queue *aq; |
472 | ||
bc4b295e HF |
473 | spin_lock_bh(&ap_queues_lock); |
474 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
475 | if (aq->queue_count == 0) | |
476 | continue; | |
477 | spin_unlock_bh(&ap_queues_lock); | |
478 | return 1; | |
9af3e04e | 479 | } |
bc4b295e | 480 | spin_unlock_bh(&ap_queues_lock); |
e28d2af4 | 481 | return 0; |
9af3e04e MS |
482 | } |
483 | ||
83e9d5d2 MS |
484 | /** |
485 | * ap_poll_thread(): Thread that polls for finished requests. | |
486 | * @data: Unused pointer | |
487 | * | |
488 | * AP bus poll thread. The purpose of this thread is to poll for | |
489 | * finished requests in a loop if there is a "free" cpu - that is | |
490 | * a cpu that doesn't have anything better to do. The polling stops | |
491 | * as soon as there is another task or if all messages have been | |
492 | * delivered. | |
493 | */ | |
494 | static int ap_poll_thread(void *data) | |
495 | { | |
496 | DECLARE_WAITQUEUE(wait, current); | |
83e9d5d2 MS |
497 | |
498 | set_user_nice(current, MAX_NICE); | |
499 | set_freezable(); | |
500 | while (!kthread_should_stop()) { | |
501 | add_wait_queue(&ap_poll_wait, &wait); | |
502 | set_current_state(TASK_INTERRUPTIBLE); | |
41677b1d | 503 | if (!ap_pending_requests()) { |
83e9d5d2 MS |
504 | schedule(); |
505 | try_to_freeze(); | |
506 | } | |
507 | set_current_state(TASK_RUNNING); | |
508 | remove_wait_queue(&ap_poll_wait, &wait); | |
83e9d5d2 MS |
509 | if (need_resched()) { |
510 | schedule(); | |
511 | try_to_freeze(); | |
512 | continue; | |
513 | } | |
3f3007af | 514 | ap_tasklet_fn(0); |
9af3e04e MS |
515 | } |
516 | ||
83e9d5d2 MS |
517 | return 0; |
518 | } | |
519 | ||
520 | static int ap_poll_thread_start(void) | |
521 | { | |
522 | int rc; | |
523 | ||
cabebb69 | 524 | if (ap_irq_flag || ap_poll_kthread) |
83e9d5d2 MS |
525 | return 0; |
526 | mutex_lock(&ap_poll_thread_mutex); | |
527 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
9c705206 | 528 | rc = PTR_ERR_OR_ZERO(ap_poll_kthread); |
83e9d5d2 MS |
529 | if (rc) |
530 | ap_poll_kthread = NULL; | |
531 | mutex_unlock(&ap_poll_thread_mutex); | |
532 | return rc; | |
533 | } | |
534 | ||
535 | static void ap_poll_thread_stop(void) | |
536 | { | |
537 | if (!ap_poll_kthread) | |
538 | return; | |
539 | mutex_lock(&ap_poll_thread_mutex); | |
540 | kthread_stop(ap_poll_kthread); | |
541 | ap_poll_kthread = NULL; | |
542 | mutex_unlock(&ap_poll_thread_mutex); | |
543 | } | |
544 | ||
e28d2af4 IT |
545 | #define is_card_dev(x) ((x)->parent == ap_root_device) |
546 | #define is_queue_dev(x) ((x)->parent != ap_root_device) | |
1534c382 MS |
547 | |
548 | /** | |
1749a81d FB |
549 | * ap_bus_match() |
550 | * @dev: Pointer to device | |
551 | * @drv: Pointer to device_driver | |
552 | * | |
1534c382 MS |
553 | * AP bus driver registration/unregistration. |
554 | */ | |
555 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
556 | { | |
1534c382 MS |
557 | struct ap_driver *ap_drv = to_ap_drv(drv); |
558 | struct ap_device_id *id; | |
559 | ||
1749a81d | 560 | /* |
1534c382 MS |
561 | * Compare device type of the device with the list of |
562 | * supported types of the device_driver. | |
563 | */ | |
564 | for (id = ap_drv->ids; id->match_flags; id++) { | |
e28d2af4 IT |
565 | if (is_card_dev(dev) && |
566 | id->match_flags & AP_DEVICE_ID_MATCH_CARD_TYPE && | |
567 | id->dev_type == to_ap_dev(dev)->device_type) | |
568 | return 1; | |
569 | if (is_queue_dev(dev) && | |
570 | id->match_flags & AP_DEVICE_ID_MATCH_QUEUE_TYPE && | |
571 | id->dev_type == to_ap_dev(dev)->device_type) | |
572 | return 1; | |
1534c382 MS |
573 | } |
574 | return 0; | |
575 | } | |
576 | ||
577 | /** | |
1749a81d FB |
578 | * ap_uevent(): Uevent function for AP devices. |
579 | * @dev: Pointer to device | |
580 | * @env: Pointer to kobj_uevent_env | |
581 | * | |
582 | * It sets up a single environment variable DEV_TYPE which contains the | |
583 | * hardware device type. | |
1534c382 | 584 | */ |
2a81ada3 | 585 | static int ap_uevent(const struct device *dev, struct kobj_uevent_env *env) |
1534c382 | 586 | { |
df6f508c | 587 | int rc = 0; |
2a81ada3 | 588 | const struct ap_device *ap_dev = to_ap_dev(dev); |
1534c382 | 589 | |
837cd105 HF |
590 | /* Uevents from ap bus core don't need extensions to the env */ |
591 | if (dev == ap_root_device) | |
592 | return 0; | |
1534c382 | 593 | |
df6f508c HF |
594 | if (is_card_dev(dev)) { |
595 | struct ap_card *ac = to_ap_card(&ap_dev->device); | |
bf62456e | 596 | |
df6f508c HF |
597 | /* Set up DEV_TYPE environment variable. */ |
598 | rc = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); | |
599 | if (rc) | |
600 | return rc; | |
601 | /* Add MODALIAS= */ | |
602 | rc = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); | |
603 | if (rc) | |
604 | return rc; | |
605 | ||
606 | /* Add MODE=<accel|cca|ep11> */ | |
d4c53ae8 | 607 | if (ac->hwinfo.accel) |
df6f508c | 608 | rc = add_uevent_var(env, "MODE=accel"); |
d4c53ae8 | 609 | else if (ac->hwinfo.cca) |
df6f508c | 610 | rc = add_uevent_var(env, "MODE=cca"); |
d4c53ae8 | 611 | else if (ac->hwinfo.ep11) |
df6f508c HF |
612 | rc = add_uevent_var(env, "MODE=ep11"); |
613 | if (rc) | |
614 | return rc; | |
615 | } else { | |
616 | struct ap_queue *aq = to_ap_queue(&ap_dev->device); | |
617 | ||
618 | /* Add MODE=<accel|cca|ep11> */ | |
d4c53ae8 | 619 | if (aq->card->hwinfo.accel) |
df6f508c | 620 | rc = add_uevent_var(env, "MODE=accel"); |
d4c53ae8 | 621 | else if (aq->card->hwinfo.cca) |
df6f508c | 622 | rc = add_uevent_var(env, "MODE=cca"); |
d4c53ae8 | 623 | else if (aq->card->hwinfo.ep11) |
df6f508c HF |
624 | rc = add_uevent_var(env, "MODE=ep11"); |
625 | if (rc) | |
626 | return rc; | |
627 | } | |
837cd105 HF |
628 | |
629 | return 0; | |
630 | } | |
631 | ||
632 | static void ap_send_init_scan_done_uevent(void) | |
633 | { | |
634 | char *envp[] = { "INITSCAN=done", NULL }; | |
635 | ||
636 | kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); | |
637 | } | |
638 | ||
639 | static void ap_send_bindings_complete_uevent(void) | |
640 | { | |
0677519a HF |
641 | char buf[32]; |
642 | char *envp[] = { "BINDINGS=complete", buf, NULL }; | |
837cd105 | 643 | |
0677519a HF |
644 | snprintf(buf, sizeof(buf), "COMPLETECOUNT=%llu", |
645 | atomic64_inc_return(&ap_bindings_complete_count)); | |
837cd105 HF |
646 | kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); |
647 | } | |
648 | ||
df6f508c HF |
649 | void ap_send_config_uevent(struct ap_device *ap_dev, bool cfg) |
650 | { | |
651 | char buf[16]; | |
652 | char *envp[] = { buf, NULL }; | |
653 | ||
654 | snprintf(buf, sizeof(buf), "CONFIG=%d", cfg ? 1 : 0); | |
655 | ||
656 | kobject_uevent_env(&ap_dev->device.kobj, KOBJ_CHANGE, envp); | |
657 | } | |
658 | EXPORT_SYMBOL(ap_send_config_uevent); | |
659 | ||
660 | void ap_send_online_uevent(struct ap_device *ap_dev, int online) | |
661 | { | |
662 | char buf[16]; | |
663 | char *envp[] = { buf, NULL }; | |
664 | ||
665 | snprintf(buf, sizeof(buf), "ONLINE=%d", online ? 1 : 0); | |
666 | ||
667 | kobject_uevent_env(&ap_dev->device.kobj, KOBJ_CHANGE, envp); | |
668 | } | |
669 | EXPORT_SYMBOL(ap_send_online_uevent); | |
670 | ||
d9b38e9d HF |
671 | static void ap_send_mask_changed_uevent(unsigned long *newapm, |
672 | unsigned long *newaqm) | |
673 | { | |
674 | char buf[100]; | |
675 | char *envp[] = { buf, NULL }; | |
676 | ||
677 | if (newapm) | |
678 | snprintf(buf, sizeof(buf), | |
679 | "APMASK=0x%016lx%016lx%016lx%016lx\n", | |
680 | newapm[0], newapm[1], newapm[2], newapm[3]); | |
681 | else | |
682 | snprintf(buf, sizeof(buf), | |
683 | "AQMASK=0x%016lx%016lx%016lx%016lx\n", | |
684 | newaqm[0], newaqm[1], newaqm[2], newaqm[3]); | |
685 | ||
686 | kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); | |
687 | } | |
688 | ||
837cd105 HF |
689 | /* |
690 | * calc # of bound APQNs | |
691 | */ | |
692 | ||
693 | struct __ap_calc_ctrs { | |
694 | unsigned int apqns; | |
695 | unsigned int bound; | |
696 | }; | |
697 | ||
698 | static int __ap_calc_helper(struct device *dev, void *arg) | |
699 | { | |
2004b57c | 700 | struct __ap_calc_ctrs *pctrs = (struct __ap_calc_ctrs *)arg; |
837cd105 HF |
701 | |
702 | if (is_queue_dev(dev)) { | |
703 | pctrs->apqns++; | |
c8c68c5f | 704 | if (dev->driver) |
837cd105 HF |
705 | pctrs->bound++; |
706 | } | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | static void ap_calc_bound_apqns(unsigned int *apqns, unsigned int *bound) | |
712 | { | |
713 | struct __ap_calc_ctrs ctrs; | |
714 | ||
715 | memset(&ctrs, 0, sizeof(ctrs)); | |
2004b57c | 716 | bus_for_each_dev(&ap_bus_type, NULL, (void *)&ctrs, __ap_calc_helper); |
bf62456e | 717 | |
837cd105 HF |
718 | *apqns = ctrs.apqns; |
719 | *bound = ctrs.bound; | |
1534c382 MS |
720 | } |
721 | ||
837cd105 | 722 | /* |
778412ab | 723 | * After ap bus scan do check if all existing APQNs are |
837cd105 HF |
724 | * bound to device drivers. |
725 | */ | |
726 | static void ap_check_bindings_complete(void) | |
727 | { | |
728 | unsigned int apqns, bound; | |
729 | ||
730 | if (atomic64_read(&ap_scan_bus_count) >= 1) { | |
731 | ap_calc_bound_apqns(&apqns, &bound); | |
732 | if (bound == apqns) { | |
778412ab HF |
733 | if (!completion_done(&ap_apqn_bindings_complete)) { |
734 | complete_all(&ap_apqn_bindings_complete); | |
306d6bda | 735 | ap_send_bindings_complete_uevent(); |
778412ab | 736 | pr_debug("%s all apqn bindings complete\n", __func__); |
837cd105 | 737 | } |
837cd105 HF |
738 | } |
739 | } | |
740 | } | |
741 | ||
742 | /* | |
743 | * Interface to wait for the AP bus to have done one initial ap bus | |
744 | * scan and all detected APQNs have been bound to device drivers. | |
745 | * If these both conditions are not fulfilled, this function blocks | |
746 | * on a condition with wait_for_completion_interruptible_timeout(). | |
747 | * If these both conditions are fulfilled (before the timeout hits) | |
748 | * the return value is 0. If the timeout (in jiffies) hits instead | |
749 | * -ETIME is returned. On failures negative return values are | |
750 | * returned to the caller. | |
751 | */ | |
778412ab | 752 | int ap_wait_apqn_bindings_complete(unsigned long timeout) |
837cd105 | 753 | { |
778412ab | 754 | int rc = 0; |
837cd105 HF |
755 | long l; |
756 | ||
778412ab | 757 | if (completion_done(&ap_apqn_bindings_complete)) |
837cd105 HF |
758 | return 0; |
759 | ||
760 | if (timeout) | |
761 | l = wait_for_completion_interruptible_timeout( | |
778412ab | 762 | &ap_apqn_bindings_complete, timeout); |
837cd105 HF |
763 | else |
764 | l = wait_for_completion_interruptible( | |
778412ab | 765 | &ap_apqn_bindings_complete); |
837cd105 | 766 | if (l < 0) |
778412ab | 767 | rc = l == -ERESTARTSYS ? -EINTR : l; |
837cd105 | 768 | else if (l == 0 && timeout) |
778412ab | 769 | rc = -ETIME; |
837cd105 | 770 | |
778412ab HF |
771 | pr_debug("%s rc=%d\n", __func__, rc); |
772 | return rc; | |
837cd105 | 773 | } |
778412ab | 774 | EXPORT_SYMBOL(ap_wait_apqn_bindings_complete); |
837cd105 | 775 | |
e28d2af4 | 776 | static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data) |
83e9d5d2 | 777 | { |
e28d2af4 | 778 | if (is_queue_dev(dev) && |
2004b57c | 779 | AP_QID_CARD(to_ap_queue(dev)->qid) == (int)(long)data) |
e28d2af4 | 780 | device_unregister(dev); |
83e9d5d2 MS |
781 | return 0; |
782 | } | |
783 | ||
7e0bdbe5 HF |
784 | static int __ap_revise_reserved(struct device *dev, void *dummy) |
785 | { | |
786 | int rc, card, queue, devres, drvres; | |
787 | ||
788 | if (is_queue_dev(dev)) { | |
789 | card = AP_QID_CARD(to_ap_queue(dev)->qid); | |
790 | queue = AP_QID_QUEUE(to_ap_queue(dev)->qid); | |
791 | mutex_lock(&ap_perms_mutex); | |
2004b57c HF |
792 | devres = test_bit_inv(card, ap_perms.apm) && |
793 | test_bit_inv(queue, ap_perms.aqm); | |
7e0bdbe5 HF |
794 | mutex_unlock(&ap_perms_mutex); |
795 | drvres = to_ap_drv(dev->driver)->flags | |
796 | & AP_DRIVER_FLAG_DEFAULT; | |
797 | if (!!devres != !!drvres) { | |
08b2c370 HF |
798 | pr_debug("%s reprobing queue=%02x.%04x\n", |
799 | __func__, card, queue); | |
7e0bdbe5 | 800 | rc = device_reprobe(dev); |
132c1e74 HF |
801 | if (rc) |
802 | AP_DBF_WARN("%s reprobing queue=%02x.%04x failed\n", | |
803 | __func__, card, queue); | |
7e0bdbe5 HF |
804 | } |
805 | } | |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
810 | static void ap_bus_revise_bindings(void) | |
811 | { | |
812 | bus_for_each_dev(&ap_bus_type, NULL, NULL, __ap_revise_reserved); | |
813 | } | |
814 | ||
3f85d1df TK |
815 | /** |
816 | * ap_owned_by_def_drv: indicates whether an AP adapter is reserved for the | |
817 | * default host driver or not. | |
818 | * @card: the APID of the adapter card to check | |
819 | * @queue: the APQI of the queue to check | |
820 | * | |
821 | * Note: the ap_perms_mutex must be locked by the caller of this function. | |
822 | * | |
823 | * Return: an int specifying whether the AP adapter is reserved for the host (1) | |
824 | * or not (0). | |
825 | */ | |
7e0bdbe5 HF |
826 | int ap_owned_by_def_drv(int card, int queue) |
827 | { | |
828 | int rc = 0; | |
829 | ||
830 | if (card < 0 || card >= AP_DEVICES || queue < 0 || queue >= AP_DOMAINS) | |
831 | return -EINVAL; | |
832 | ||
2004b57c HF |
833 | if (test_bit_inv(card, ap_perms.apm) && |
834 | test_bit_inv(queue, ap_perms.aqm)) | |
7e0bdbe5 HF |
835 | rc = 1; |
836 | ||
7e0bdbe5 HF |
837 | return rc; |
838 | } | |
839 | EXPORT_SYMBOL(ap_owned_by_def_drv); | |
840 | ||
3f85d1df TK |
841 | /** |
842 | * ap_apqn_in_matrix_owned_by_def_drv: indicates whether every APQN contained in | |
843 | * a set is reserved for the host drivers | |
844 | * or not. | |
845 | * @apm: a bitmap specifying a set of APIDs comprising the APQNs to check | |
846 | * @aqm: a bitmap specifying a set of APQIs comprising the APQNs to check | |
847 | * | |
848 | * Note: the ap_perms_mutex must be locked by the caller of this function. | |
849 | * | |
850 | * Return: an int specifying whether each APQN is reserved for the host (1) or | |
851 | * not (0) | |
852 | */ | |
7e0bdbe5 HF |
853 | int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm, |
854 | unsigned long *aqm) | |
855 | { | |
856 | int card, queue, rc = 0; | |
857 | ||
7e0bdbe5 HF |
858 | for (card = 0; !rc && card < AP_DEVICES; card++) |
859 | if (test_bit_inv(card, apm) && | |
860 | test_bit_inv(card, ap_perms.apm)) | |
861 | for (queue = 0; !rc && queue < AP_DOMAINS; queue++) | |
862 | if (test_bit_inv(queue, aqm) && | |
863 | test_bit_inv(queue, ap_perms.aqm)) | |
864 | rc = 1; | |
865 | ||
7e0bdbe5 HF |
866 | return rc; |
867 | } | |
868 | EXPORT_SYMBOL(ap_apqn_in_matrix_owned_by_def_drv); | |
869 | ||
1534c382 MS |
870 | static int ap_device_probe(struct device *dev) |
871 | { | |
872 | struct ap_device *ap_dev = to_ap_dev(dev); | |
3f3007af | 873 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
29c2680f HF |
874 | int card, queue, devres, drvres, rc = -ENODEV; |
875 | ||
876 | if (!get_device(dev)) | |
877 | return rc; | |
7e0bdbe5 HF |
878 | |
879 | if (is_queue_dev(dev)) { | |
880 | /* | |
881 | * If the apqn is marked as reserved/used by ap bus and | |
882 | * default drivers, only probe with drivers with the default | |
883 | * flag set. If it is not marked, only probe with drivers | |
884 | * with the default flag not set. | |
885 | */ | |
886 | card = AP_QID_CARD(to_ap_queue(dev)->qid); | |
887 | queue = AP_QID_QUEUE(to_ap_queue(dev)->qid); | |
888 | mutex_lock(&ap_perms_mutex); | |
2004b57c HF |
889 | devres = test_bit_inv(card, ap_perms.apm) && |
890 | test_bit_inv(queue, ap_perms.aqm); | |
7e0bdbe5 HF |
891 | mutex_unlock(&ap_perms_mutex); |
892 | drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT; | |
893 | if (!!devres != !!drvres) | |
29c2680f | 894 | goto out; |
7e0bdbe5 | 895 | } |
666e68e0 | 896 | |
306d6bda HF |
897 | /* |
898 | * Rearm the bindings complete completion to trigger | |
899 | * bindings complete when all devices are bound again | |
900 | */ | |
901 | reinit_completion(&ap_apqn_bindings_complete); | |
902 | ||
e3850508 | 903 | /* Add queue/card to list of active queues/cards */ |
bc4b295e HF |
904 | spin_lock_bh(&ap_queues_lock); |
905 | if (is_queue_dev(dev)) | |
906 | hash_add(ap_queues, &to_ap_queue(dev)->hnode, | |
907 | to_ap_queue(dev)->qid); | |
908 | spin_unlock_bh(&ap_queues_lock); | |
e3850508 | 909 | |
1534c382 | 910 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
e3850508 HF |
911 | |
912 | if (rc) { | |
bc4b295e HF |
913 | spin_lock_bh(&ap_queues_lock); |
914 | if (is_queue_dev(dev)) | |
915 | hash_del(&to_ap_queue(dev)->hnode); | |
916 | spin_unlock_bh(&ap_queues_lock); | |
2004b57c | 917 | } |
e3850508 | 918 | |
29c2680f HF |
919 | out: |
920 | if (rc) | |
921 | put_device(dev); | |
1534c382 MS |
922 | return rc; |
923 | } | |
924 | ||
fc7a6209 | 925 | static void ap_device_remove(struct device *dev) |
1534c382 MS |
926 | { |
927 | struct ap_device *ap_dev = to_ap_dev(dev); | |
c8c68c5f | 928 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
1534c382 | 929 | |
01396a37 | 930 | /* prepare ap queue device removal */ |
104f708f | 931 | if (is_queue_dev(dev)) |
01396a37 HF |
932 | ap_queue_prepare_remove(to_ap_queue(dev)); |
933 | ||
934 | /* driver's chance to clean up gracefully */ | |
e3850508 HF |
935 | if (ap_drv->remove) |
936 | ap_drv->remove(ap_dev); | |
937 | ||
01396a37 HF |
938 | /* now do the ap queue device remove */ |
939 | if (is_queue_dev(dev)) | |
940 | ap_queue_remove(to_ap_queue(dev)); | |
941 | ||
e3850508 | 942 | /* Remove queue/card from list of active queues/cards */ |
bc4b295e HF |
943 | spin_lock_bh(&ap_queues_lock); |
944 | if (is_queue_dev(dev)) | |
945 | hash_del(&to_ap_queue(dev)->hnode); | |
946 | spin_unlock_bh(&ap_queues_lock); | |
e3850508 | 947 | |
29c2680f | 948 | put_device(dev); |
1534c382 MS |
949 | } |
950 | ||
bc4b295e HF |
951 | struct ap_queue *ap_get_qdev(ap_qid_t qid) |
952 | { | |
953 | int bkt; | |
954 | struct ap_queue *aq; | |
955 | ||
956 | spin_lock_bh(&ap_queues_lock); | |
957 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
958 | if (aq->qid == qid) { | |
959 | get_device(&aq->ap_dev.device); | |
960 | spin_unlock_bh(&ap_queues_lock); | |
961 | return aq; | |
962 | } | |
963 | } | |
964 | spin_unlock_bh(&ap_queues_lock); | |
965 | ||
966 | return NULL; | |
967 | } | |
968 | EXPORT_SYMBOL(ap_get_qdev); | |
969 | ||
1534c382 MS |
970 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, |
971 | char *name) | |
972 | { | |
973 | struct device_driver *drv = &ap_drv->driver; | |
974 | ||
975 | drv->bus = &ap_bus_type; | |
1534c382 MS |
976 | drv->owner = owner; |
977 | drv->name = name; | |
978 | return driver_register(drv); | |
979 | } | |
980 | EXPORT_SYMBOL(ap_driver_register); | |
981 | ||
982 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
983 | { | |
984 | driver_unregister(&ap_drv->driver); | |
985 | } | |
986 | EXPORT_SYMBOL(ap_driver_unregister); | |
987 | ||
eacf5b36 HF |
988 | /* |
989 | * Enforce a synchronous AP bus rescan. | |
990 | * Returns true if the bus scan finds a change in the AP configuration | |
991 | * and AP devices have been added or deleted when this function returns. | |
992 | */ | |
993 | bool ap_bus_force_rescan(void) | |
dabecb29 | 994 | { |
eacf5b36 HF |
995 | unsigned long scan_counter = atomic64_read(&ap_scan_bus_count); |
996 | bool rc = false; | |
997 | ||
998 | pr_debug(">%s scan counter=%lu\n", __func__, scan_counter); | |
999 | ||
e14aec23 | 1000 | /* Only trigger AP bus scans after the initial scan is done */ |
eacf5b36 HF |
1001 | if (scan_counter <= 0) |
1002 | goto out; | |
e14aec23 | 1003 | |
eacf5b36 HF |
1004 | /* Try to acquire the AP scan bus mutex */ |
1005 | if (mutex_trylock(&ap_scan_bus_mutex)) { | |
1006 | /* mutex acquired, run the AP bus scan */ | |
1007 | ap_scan_bus_result = ap_scan_bus(); | |
1008 | rc = ap_scan_bus_result; | |
1009 | mutex_unlock(&ap_scan_bus_mutex); | |
1010 | goto out; | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * Mutex acquire failed. So there is currently another task | |
1015 | * already running the AP bus scan. Then let's simple wait | |
1016 | * for the lock which means the other task has finished and | |
1017 | * stored the result in ap_scan_bus_result. | |
1018 | */ | |
1019 | if (mutex_lock_interruptible(&ap_scan_bus_mutex)) { | |
1020 | /* some error occurred, ignore and go out */ | |
1021 | goto out; | |
1022 | } | |
1023 | rc = ap_scan_bus_result; | |
1024 | mutex_unlock(&ap_scan_bus_mutex); | |
1025 | ||
1026 | out: | |
1027 | pr_debug("%s rc=%d\n", __func__, rc); | |
1028 | return rc; | |
dabecb29 HD |
1029 | } |
1030 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
1031 | ||
0d9c038f | 1032 | /* |
2004b57c HF |
1033 | * A config change has happened, force an ap bus rescan. |
1034 | */ | |
2a483d33 HD |
1035 | static int ap_bus_cfg_chg(struct notifier_block *nb, |
1036 | unsigned long action, void *data) | |
0d9c038f | 1037 | { |
2a483d33 HD |
1038 | if (action != CHSC_NOTIFY_AP_CFG) |
1039 | return NOTIFY_DONE; | |
1040 | ||
08b2c370 | 1041 | pr_debug("%s config change, forcing bus rescan\n", __func__); |
0d9c038f TK |
1042 | |
1043 | ap_bus_force_rescan(); | |
2a483d33 HD |
1044 | |
1045 | return NOTIFY_OK; | |
0d9c038f TK |
1046 | } |
1047 | ||
2a483d33 HD |
1048 | static struct notifier_block ap_bus_nb = { |
1049 | .notifier_call = ap_bus_cfg_chg, | |
1050 | }; | |
1051 | ||
6e697394 | 1052 | int ap_hex2bitmap(const char *str, unsigned long *bitmap, int bits) |
7e0bdbe5 HF |
1053 | { |
1054 | int i, n, b; | |
1055 | ||
1056 | /* bits needs to be a multiple of 8 */ | |
1057 | if (bits & 0x07) | |
1058 | return -EINVAL; | |
1059 | ||
7e0bdbe5 HF |
1060 | if (str[0] == '0' && str[1] == 'x') |
1061 | str++; | |
1062 | if (*str == 'x') | |
1063 | str++; | |
1064 | ||
1065 | for (i = 0; isxdigit(*str) && i < bits; str++) { | |
1066 | b = hex_to_bin(*str); | |
1067 | for (n = 0; n < 4; n++) | |
1068 | if (b & (0x08 >> n)) | |
1069 | set_bit_inv(i + n, bitmap); | |
1070 | i += 4; | |
1071 | } | |
1072 | ||
3d8f60d3 HF |
1073 | if (*str == '\n') |
1074 | str++; | |
1075 | if (*str) | |
1076 | return -EINVAL; | |
1077 | return 0; | |
1078 | } | |
6e697394 | 1079 | EXPORT_SYMBOL(ap_hex2bitmap); |
3d8f60d3 HF |
1080 | |
1081 | /* | |
fa108f95 MS |
1082 | * modify_bitmap() - parse bitmask argument and modify an existing |
1083 | * bit mask accordingly. A concatenation (done with ',') of these | |
1084 | * terms is recognized: | |
3d8f60d3 HF |
1085 | * +<bitnr>[-<bitnr>] or -<bitnr>[-<bitnr>] |
1086 | * <bitnr> may be any valid number (hex, decimal or octal) in the range | |
1087 | * 0...bits-1; the leading + or - is required. Here are some examples: | |
1088 | * +0-15,+32,-128,-0xFF | |
1089 | * -0-255,+1-16,+0x128 | |
1090 | * +1,+2,+3,+4,-5,-7-10 | |
fa108f95 MS |
1091 | * Returns the new bitmap after all changes have been applied. Every |
1092 | * positive value in the string will set a bit and every negative value | |
1093 | * in the string will clear a bit. As a bit may be touched more than once, | |
1094 | * the last 'operation' wins: | |
1095 | * +0-255,-128 = first bits 0-255 will be set, then bit 128 will be | |
1096 | * cleared again. All other bits are unmodified. | |
3d8f60d3 | 1097 | */ |
fa108f95 | 1098 | static int modify_bitmap(const char *str, unsigned long *bitmap, int bits) |
3d8f60d3 | 1099 | { |
d4f9d5a9 | 1100 | unsigned long a, i, z; |
3d8f60d3 HF |
1101 | char *np, sign; |
1102 | ||
1103 | /* bits needs to be a multiple of 8 */ | |
1104 | if (bits & 0x07) | |
7e0bdbe5 HF |
1105 | return -EINVAL; |
1106 | ||
3d8f60d3 HF |
1107 | while (*str) { |
1108 | sign = *str++; | |
1109 | if (sign != '+' && sign != '-') | |
1110 | return -EINVAL; | |
1111 | a = z = simple_strtoul(str, &np, 0); | |
1112 | if (str == np || a >= bits) | |
1113 | return -EINVAL; | |
1114 | str = np; | |
1115 | if (*str == '-') { | |
1116 | z = simple_strtoul(++str, &np, 0); | |
1117 | if (str == np || a > z || z >= bits) | |
1118 | return -EINVAL; | |
1119 | str = np; | |
1120 | } | |
1121 | for (i = a; i <= z; i++) | |
fa108f95 MS |
1122 | if (sign == '+') |
1123 | set_bit_inv(i, bitmap); | |
1124 | else | |
1125 | clear_bit_inv(i, bitmap); | |
3d8f60d3 HF |
1126 | while (*str == ',' || *str == '\n') |
1127 | str++; | |
1128 | } | |
1129 | ||
7e0bdbe5 HF |
1130 | return 0; |
1131 | } | |
1132 | ||
4f8206b8 TK |
1133 | static int ap_parse_bitmap_str(const char *str, unsigned long *bitmap, int bits, |
1134 | unsigned long *newmap) | |
1135 | { | |
1136 | unsigned long size; | |
1137 | int rc; | |
1138 | ||
1139 | size = BITS_TO_LONGS(bits) * sizeof(unsigned long); | |
1140 | if (*str == '+' || *str == '-') { | |
1141 | memcpy(newmap, bitmap, size); | |
1142 | rc = modify_bitmap(str, newmap, bits); | |
1143 | } else { | |
1144 | memset(newmap, 0, size); | |
6e697394 | 1145 | rc = ap_hex2bitmap(str, newmap, bits); |
4f8206b8 TK |
1146 | } |
1147 | return rc; | |
1148 | } | |
1149 | ||
00fab235 HF |
1150 | int ap_parse_mask_str(const char *str, |
1151 | unsigned long *bitmap, int bits, | |
1152 | struct mutex *lock) | |
3d8f60d3 | 1153 | { |
fa108f95 MS |
1154 | unsigned long *newmap, size; |
1155 | int rc; | |
3d8f60d3 HF |
1156 | |
1157 | /* bits needs to be a multiple of 8 */ | |
1158 | if (bits & 0x07) | |
1159 | return -EINVAL; | |
1160 | ||
2004b57c | 1161 | size = BITS_TO_LONGS(bits) * sizeof(unsigned long); |
fa108f95 MS |
1162 | newmap = kmalloc(size, GFP_KERNEL); |
1163 | if (!newmap) | |
1164 | return -ENOMEM; | |
1165 | if (mutex_lock_interruptible(lock)) { | |
1166 | kfree(newmap); | |
1167 | return -ERESTARTSYS; | |
1168 | } | |
4f8206b8 | 1169 | rc = ap_parse_bitmap_str(str, bitmap, bits, newmap); |
fa108f95 MS |
1170 | if (rc == 0) |
1171 | memcpy(bitmap, newmap, size); | |
3d8f60d3 | 1172 | mutex_unlock(lock); |
fa108f95 MS |
1173 | kfree(newmap); |
1174 | return rc; | |
3d8f60d3 | 1175 | } |
00fab235 | 1176 | EXPORT_SYMBOL(ap_parse_mask_str); |
3d8f60d3 HF |
1177 | |
1178 | /* | |
1179 | * AP bus attributes. | |
1180 | */ | |
1181 | ||
75cff725 | 1182 | static ssize_t ap_domain_show(const struct bus_type *bus, char *buf) |
1534c382 | 1183 | { |
964d581d | 1184 | return sysfs_emit(buf, "%d\n", ap_domain_index); |
1534c382 MS |
1185 | } |
1186 | ||
75cff725 | 1187 | static ssize_t ap_domain_store(const struct bus_type *bus, |
fc1d3f02 IT |
1188 | const char *buf, size_t count) |
1189 | { | |
1190 | int domain; | |
1191 | ||
1192 | if (sscanf(buf, "%i\n", &domain) != 1 || | |
7e0bdbe5 HF |
1193 | domain < 0 || domain > ap_max_domain_id || |
1194 | !test_bit_inv(domain, ap_perms.aqm)) | |
fc1d3f02 | 1195 | return -EINVAL; |
c8337c47 | 1196 | |
fc1d3f02 IT |
1197 | spin_lock_bh(&ap_domain_lock); |
1198 | ap_domain_index = domain; | |
1199 | spin_unlock_bh(&ap_domain_lock); | |
cccd85bf | 1200 | |
3f74eb5f HF |
1201 | AP_DBF_INFO("%s stored new default domain=%d\n", |
1202 | __func__, domain); | |
cccd85bf | 1203 | |
fc1d3f02 IT |
1204 | return count; |
1205 | } | |
1206 | ||
ac2b96f3 | 1207 | static BUS_ATTR_RW(ap_domain); |
1534c382 | 1208 | |
75cff725 | 1209 | static ssize_t ap_control_domain_mask_show(const struct bus_type *bus, char *buf) |
91f3e3ea | 1210 | { |
8dec9cb9 | 1211 | if (!ap_qci_info->flags) /* QCI not supported */ |
964d581d | 1212 | return sysfs_emit(buf, "not supported\n"); |
40501c70 | 1213 | |
964d581d HF |
1214 | return sysfs_emit(buf, "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", |
1215 | ap_qci_info->adm[0], ap_qci_info->adm[1], | |
1216 | ap_qci_info->adm[2], ap_qci_info->adm[3], | |
1217 | ap_qci_info->adm[4], ap_qci_info->adm[5], | |
1218 | ap_qci_info->adm[6], ap_qci_info->adm[7]); | |
91f3e3ea IT |
1219 | } |
1220 | ||
ac2b96f3 | 1221 | static BUS_ATTR_RO(ap_control_domain_mask); |
91f3e3ea | 1222 | |
75cff725 | 1223 | static ssize_t ap_usage_domain_mask_show(const struct bus_type *bus, char *buf) |
e28d2af4 | 1224 | { |
8dec9cb9 | 1225 | if (!ap_qci_info->flags) /* QCI not supported */ |
964d581d | 1226 | return sysfs_emit(buf, "not supported\n"); |
40501c70 | 1227 | |
964d581d HF |
1228 | return sysfs_emit(buf, "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", |
1229 | ap_qci_info->aqm[0], ap_qci_info->aqm[1], | |
1230 | ap_qci_info->aqm[2], ap_qci_info->aqm[3], | |
1231 | ap_qci_info->aqm[4], ap_qci_info->aqm[5], | |
1232 | ap_qci_info->aqm[6], ap_qci_info->aqm[7]); | |
e28d2af4 IT |
1233 | } |
1234 | ||
ac2b96f3 | 1235 | static BUS_ATTR_RO(ap_usage_domain_mask); |
1534c382 | 1236 | |
75cff725 | 1237 | static ssize_t ap_adapter_mask_show(const struct bus_type *bus, char *buf) |
aa55bf5f | 1238 | { |
8dec9cb9 | 1239 | if (!ap_qci_info->flags) /* QCI not supported */ |
964d581d | 1240 | return sysfs_emit(buf, "not supported\n"); |
40501c70 | 1241 | |
964d581d HF |
1242 | return sysfs_emit(buf, "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", |
1243 | ap_qci_info->apm[0], ap_qci_info->apm[1], | |
1244 | ap_qci_info->apm[2], ap_qci_info->apm[3], | |
1245 | ap_qci_info->apm[4], ap_qci_info->apm[5], | |
1246 | ap_qci_info->apm[6], ap_qci_info->apm[7]); | |
aa55bf5f HF |
1247 | } |
1248 | ||
1249 | static BUS_ATTR_RO(ap_adapter_mask); | |
1250 | ||
75cff725 | 1251 | static ssize_t ap_interrupts_show(const struct bus_type *bus, char *buf) |
cb17a636 | 1252 | { |
964d581d | 1253 | return sysfs_emit(buf, "%d\n", ap_irq_flag ? 1 : 0); |
cb17a636 FB |
1254 | } |
1255 | ||
ac2b96f3 HF |
1256 | static BUS_ATTR_RO(ap_interrupts); |
1257 | ||
75cff725 | 1258 | static ssize_t config_time_show(const struct bus_type *bus, char *buf) |
ac2b96f3 | 1259 | { |
99b3126e | 1260 | return sysfs_emit(buf, "%d\n", ap_scan_bus_time); |
ac2b96f3 | 1261 | } |
cb17a636 | 1262 | |
75cff725 | 1263 | static ssize_t config_time_store(const struct bus_type *bus, |
ac2b96f3 | 1264 | const char *buf, size_t count) |
1534c382 MS |
1265 | { |
1266 | int time; | |
1267 | ||
1268 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1269 | return -EINVAL; | |
99b3126e HF |
1270 | ap_scan_bus_time = time; |
1271 | mod_timer(&ap_scan_bus_timer, jiffies + ap_scan_bus_time * HZ); | |
1534c382 MS |
1272 | return count; |
1273 | } | |
1274 | ||
ac2b96f3 | 1275 | static BUS_ATTR_RW(config_time); |
1534c382 | 1276 | |
75cff725 | 1277 | static ssize_t poll_thread_show(const struct bus_type *bus, char *buf) |
1534c382 | 1278 | { |
964d581d | 1279 | return sysfs_emit(buf, "%d\n", ap_poll_kthread ? 1 : 0); |
1534c382 MS |
1280 | } |
1281 | ||
75cff725 | 1282 | static ssize_t poll_thread_store(const struct bus_type *bus, |
ac2b96f3 | 1283 | const char *buf, size_t count) |
1534c382 | 1284 | { |
263c8454 HF |
1285 | bool value; |
1286 | int rc; | |
1534c382 | 1287 | |
263c8454 HF |
1288 | rc = kstrtobool(buf, &value); |
1289 | if (rc) | |
1290 | return rc; | |
1291 | ||
1292 | if (value) { | |
1534c382 MS |
1293 | rc = ap_poll_thread_start(); |
1294 | if (rc) | |
83e9d5d2 | 1295 | count = rc; |
2004b57c | 1296 | } else { |
1534c382 | 1297 | ap_poll_thread_stop(); |
2004b57c | 1298 | } |
1534c382 MS |
1299 | return count; |
1300 | } | |
1301 | ||
ac2b96f3 | 1302 | static BUS_ATTR_RW(poll_thread); |
1534c382 | 1303 | |
75cff725 | 1304 | static ssize_t poll_timeout_show(const struct bus_type *bus, char *buf) |
fe137230 | 1305 | { |
263c8454 | 1306 | return sysfs_emit(buf, "%lu\n", poll_high_timeout); |
fe137230 FB |
1307 | } |
1308 | ||
75cff725 | 1309 | static ssize_t poll_timeout_store(const struct bus_type *bus, const char *buf, |
fe137230 FB |
1310 | size_t count) |
1311 | { | |
263c8454 | 1312 | unsigned long value; |
fe137230 | 1313 | ktime_t hr_time; |
263c8454 HF |
1314 | int rc; |
1315 | ||
1316 | rc = kstrtoul(buf, 0, &value); | |
1317 | if (rc) | |
1318 | return rc; | |
fe137230 FB |
1319 | |
1320 | /* 120 seconds = maximum poll interval */ | |
263c8454 | 1321 | if (value > 120000000000UL) |
fe137230 | 1322 | return -EINVAL; |
263c8454 HF |
1323 | poll_high_timeout = value; |
1324 | hr_time = poll_high_timeout; | |
fe137230 | 1325 | |
8cc2af7c IT |
1326 | spin_lock_bh(&ap_poll_timer_lock); |
1327 | hrtimer_cancel(&ap_poll_timer); | |
1328 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1329 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
1330 | spin_unlock_bh(&ap_poll_timer_lock); | |
1331 | ||
fe137230 FB |
1332 | return count; |
1333 | } | |
1334 | ||
ac2b96f3 | 1335 | static BUS_ATTR_RW(poll_timeout); |
fe137230 | 1336 | |
75cff725 | 1337 | static ssize_t ap_max_domain_id_show(const struct bus_type *bus, char *buf) |
5bc334bf | 1338 | { |
964d581d | 1339 | return sysfs_emit(buf, "%d\n", ap_max_domain_id); |
5bc334bf IT |
1340 | } |
1341 | ||
ac2b96f3 | 1342 | static BUS_ATTR_RO(ap_max_domain_id); |
5bc334bf | 1343 | |
75cff725 | 1344 | static ssize_t ap_max_adapter_id_show(const struct bus_type *bus, char *buf) |
c8337c47 | 1345 | { |
964d581d | 1346 | return sysfs_emit(buf, "%d\n", ap_max_adapter_id); |
c8337c47 HF |
1347 | } |
1348 | ||
1349 | static BUS_ATTR_RO(ap_max_adapter_id); | |
1350 | ||
75cff725 | 1351 | static ssize_t apmask_show(const struct bus_type *bus, char *buf) |
7e0bdbe5 HF |
1352 | { |
1353 | int rc; | |
1354 | ||
1355 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1356 | return -ERESTARTSYS; | |
964d581d HF |
1357 | rc = sysfs_emit(buf, "0x%016lx%016lx%016lx%016lx\n", |
1358 | ap_perms.apm[0], ap_perms.apm[1], | |
1359 | ap_perms.apm[2], ap_perms.apm[3]); | |
7e0bdbe5 HF |
1360 | mutex_unlock(&ap_perms_mutex); |
1361 | ||
1362 | return rc; | |
1363 | } | |
1364 | ||
4f8206b8 TK |
1365 | static int __verify_card_reservations(struct device_driver *drv, void *data) |
1366 | { | |
1367 | int rc = 0; | |
1368 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1369 | unsigned long *newapm = (unsigned long *)data; | |
1370 | ||
1371 | /* | |
1372 | * increase the driver's module refcounter to be sure it is not | |
1373 | * going away when we invoke the callback function. | |
1374 | */ | |
1375 | if (!try_module_get(drv->owner)) | |
1376 | return 0; | |
1377 | ||
1378 | if (ap_drv->in_use) { | |
1379 | rc = ap_drv->in_use(newapm, ap_perms.aqm); | |
1380 | if (rc) | |
1381 | rc = -EBUSY; | |
1382 | } | |
1383 | ||
1384 | /* release the driver's module */ | |
1385 | module_put(drv->owner); | |
1386 | ||
1387 | return rc; | |
1388 | } | |
1389 | ||
1390 | static int apmask_commit(unsigned long *newapm) | |
1391 | { | |
1392 | int rc; | |
1393 | unsigned long reserved[BITS_TO_LONGS(AP_DEVICES)]; | |
1394 | ||
1395 | /* | |
1396 | * Check if any bits in the apmask have been set which will | |
1397 | * result in queues being removed from non-default drivers | |
1398 | */ | |
1399 | if (bitmap_andnot(reserved, newapm, ap_perms.apm, AP_DEVICES)) { | |
1400 | rc = bus_for_each_drv(&ap_bus_type, NULL, reserved, | |
1401 | __verify_card_reservations); | |
1402 | if (rc) | |
1403 | return rc; | |
1404 | } | |
1405 | ||
1406 | memcpy(ap_perms.apm, newapm, APMASKSIZE); | |
1407 | ||
1408 | return 0; | |
1409 | } | |
1410 | ||
75cff725 | 1411 | static ssize_t apmask_store(const struct bus_type *bus, const char *buf, |
7e0bdbe5 HF |
1412 | size_t count) |
1413 | { | |
d9b38e9d | 1414 | int rc, changes = 0; |
4f8206b8 TK |
1415 | DECLARE_BITMAP(newapm, AP_DEVICES); |
1416 | ||
1417 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1418 | return -ERESTARTSYS; | |
7e0bdbe5 | 1419 | |
4f8206b8 TK |
1420 | rc = ap_parse_bitmap_str(buf, ap_perms.apm, AP_DEVICES, newapm); |
1421 | if (rc) | |
1422 | goto done; | |
1423 | ||
d9b38e9d HF |
1424 | changes = memcmp(ap_perms.apm, newapm, APMASKSIZE); |
1425 | if (changes) | |
1426 | rc = apmask_commit(newapm); | |
4f8206b8 TK |
1427 | |
1428 | done: | |
1429 | mutex_unlock(&ap_perms_mutex); | |
3d8f60d3 HF |
1430 | if (rc) |
1431 | return rc; | |
7e0bdbe5 | 1432 | |
d9b38e9d HF |
1433 | if (changes) { |
1434 | ap_bus_revise_bindings(); | |
1435 | ap_send_mask_changed_uevent(newapm, NULL); | |
1436 | } | |
7e0bdbe5 HF |
1437 | |
1438 | return count; | |
1439 | } | |
1440 | ||
1441 | static BUS_ATTR_RW(apmask); | |
1442 | ||
75cff725 | 1443 | static ssize_t aqmask_show(const struct bus_type *bus, char *buf) |
7e0bdbe5 HF |
1444 | { |
1445 | int rc; | |
1446 | ||
1447 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1448 | return -ERESTARTSYS; | |
964d581d HF |
1449 | rc = sysfs_emit(buf, "0x%016lx%016lx%016lx%016lx\n", |
1450 | ap_perms.aqm[0], ap_perms.aqm[1], | |
1451 | ap_perms.aqm[2], ap_perms.aqm[3]); | |
7e0bdbe5 HF |
1452 | mutex_unlock(&ap_perms_mutex); |
1453 | ||
1454 | return rc; | |
1455 | } | |
1456 | ||
4f8206b8 TK |
1457 | static int __verify_queue_reservations(struct device_driver *drv, void *data) |
1458 | { | |
1459 | int rc = 0; | |
1460 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1461 | unsigned long *newaqm = (unsigned long *)data; | |
1462 | ||
1463 | /* | |
1464 | * increase the driver's module refcounter to be sure it is not | |
1465 | * going away when we invoke the callback function. | |
1466 | */ | |
1467 | if (!try_module_get(drv->owner)) | |
1468 | return 0; | |
1469 | ||
1470 | if (ap_drv->in_use) { | |
1471 | rc = ap_drv->in_use(ap_perms.apm, newaqm); | |
1472 | if (rc) | |
2f23256c | 1473 | rc = -EBUSY; |
4f8206b8 TK |
1474 | } |
1475 | ||
1476 | /* release the driver's module */ | |
1477 | module_put(drv->owner); | |
1478 | ||
1479 | return rc; | |
1480 | } | |
1481 | ||
1482 | static int aqmask_commit(unsigned long *newaqm) | |
1483 | { | |
1484 | int rc; | |
1485 | unsigned long reserved[BITS_TO_LONGS(AP_DOMAINS)]; | |
1486 | ||
1487 | /* | |
1488 | * Check if any bits in the aqmask have been set which will | |
1489 | * result in queues being removed from non-default drivers | |
1490 | */ | |
1491 | if (bitmap_andnot(reserved, newaqm, ap_perms.aqm, AP_DOMAINS)) { | |
1492 | rc = bus_for_each_drv(&ap_bus_type, NULL, reserved, | |
1493 | __verify_queue_reservations); | |
1494 | if (rc) | |
1495 | return rc; | |
1496 | } | |
1497 | ||
1498 | memcpy(ap_perms.aqm, newaqm, AQMASKSIZE); | |
1499 | ||
1500 | return 0; | |
1501 | } | |
1502 | ||
75cff725 | 1503 | static ssize_t aqmask_store(const struct bus_type *bus, const char *buf, |
7e0bdbe5 HF |
1504 | size_t count) |
1505 | { | |
d9b38e9d | 1506 | int rc, changes = 0; |
4f8206b8 | 1507 | DECLARE_BITMAP(newaqm, AP_DOMAINS); |
7e0bdbe5 | 1508 | |
4f8206b8 TK |
1509 | if (mutex_lock_interruptible(&ap_perms_mutex)) |
1510 | return -ERESTARTSYS; | |
1511 | ||
1512 | rc = ap_parse_bitmap_str(buf, ap_perms.aqm, AP_DOMAINS, newaqm); | |
1513 | if (rc) | |
1514 | goto done; | |
1515 | ||
d9b38e9d HF |
1516 | changes = memcmp(ap_perms.aqm, newaqm, APMASKSIZE); |
1517 | if (changes) | |
1518 | rc = aqmask_commit(newaqm); | |
4f8206b8 TK |
1519 | |
1520 | done: | |
1521 | mutex_unlock(&ap_perms_mutex); | |
3d8f60d3 HF |
1522 | if (rc) |
1523 | return rc; | |
7e0bdbe5 | 1524 | |
d9b38e9d HF |
1525 | if (changes) { |
1526 | ap_bus_revise_bindings(); | |
1527 | ap_send_mask_changed_uevent(NULL, newaqm); | |
1528 | } | |
7e0bdbe5 HF |
1529 | |
1530 | return count; | |
1531 | } | |
1532 | ||
1533 | static BUS_ATTR_RW(aqmask); | |
1534 | ||
75cff725 | 1535 | static ssize_t scans_show(const struct bus_type *bus, char *buf) |
837cd105 | 1536 | { |
964d581d | 1537 | return sysfs_emit(buf, "%llu\n", atomic64_read(&ap_scan_bus_count)); |
837cd105 HF |
1538 | } |
1539 | ||
75cff725 | 1540 | static ssize_t scans_store(const struct bus_type *bus, const char *buf, |
8944d05f HF |
1541 | size_t count) |
1542 | { | |
1543 | AP_DBF_INFO("%s force AP bus rescan\n", __func__); | |
1544 | ||
1545 | ap_bus_force_rescan(); | |
1546 | ||
1547 | return count; | |
1548 | } | |
1549 | ||
1550 | static BUS_ATTR_RW(scans); | |
837cd105 | 1551 | |
75cff725 | 1552 | static ssize_t bindings_show(const struct bus_type *bus, char *buf) |
837cd105 HF |
1553 | { |
1554 | int rc; | |
1555 | unsigned int apqns, n; | |
1556 | ||
1557 | ap_calc_bound_apqns(&apqns, &n); | |
1558 | if (atomic64_read(&ap_scan_bus_count) >= 1 && n == apqns) | |
964d581d | 1559 | rc = sysfs_emit(buf, "%u/%u (complete)\n", n, apqns); |
837cd105 | 1560 | else |
964d581d | 1561 | rc = sysfs_emit(buf, "%u/%u\n", n, apqns); |
837cd105 HF |
1562 | |
1563 | return rc; | |
1564 | } | |
1565 | ||
1566 | static BUS_ATTR_RO(bindings); | |
1567 | ||
10de638d | 1568 | static ssize_t features_show(const struct bus_type *bus, char *buf) |
d7b1813a HF |
1569 | { |
1570 | int n = 0; | |
1571 | ||
8dec9cb9 | 1572 | if (!ap_qci_info->flags) /* QCI not supported */ |
d7b1813a HF |
1573 | return sysfs_emit(buf, "-\n"); |
1574 | ||
1575 | if (ap_qci_info->apsc) | |
1576 | n += sysfs_emit_at(buf, n, "APSC "); | |
1577 | if (ap_qci_info->apxa) | |
1578 | n += sysfs_emit_at(buf, n, "APXA "); | |
1579 | if (ap_qci_info->qact) | |
1580 | n += sysfs_emit_at(buf, n, "QACT "); | |
1581 | if (ap_qci_info->rc8a) | |
1582 | n += sysfs_emit_at(buf, n, "RC8A "); | |
1583 | if (ap_qci_info->apsb) | |
1584 | n += sysfs_emit_at(buf, n, "APSB "); | |
1585 | ||
1586 | sysfs_emit_at(buf, n == 0 ? 0 : n - 1, "\n"); | |
1587 | ||
1588 | return n; | |
1589 | } | |
1590 | ||
1591 | static BUS_ATTR_RO(features); | |
1592 | ||
8cb4c20f JW |
1593 | static struct attribute *ap_bus_attrs[] = { |
1594 | &bus_attr_ap_domain.attr, | |
1595 | &bus_attr_ap_control_domain_mask.attr, | |
1596 | &bus_attr_ap_usage_domain_mask.attr, | |
1597 | &bus_attr_ap_adapter_mask.attr, | |
1598 | &bus_attr_config_time.attr, | |
1599 | &bus_attr_poll_thread.attr, | |
1600 | &bus_attr_ap_interrupts.attr, | |
1601 | &bus_attr_poll_timeout.attr, | |
1602 | &bus_attr_ap_max_domain_id.attr, | |
1603 | &bus_attr_ap_max_adapter_id.attr, | |
1604 | &bus_attr_apmask.attr, | |
1605 | &bus_attr_aqmask.attr, | |
1606 | &bus_attr_scans.attr, | |
1607 | &bus_attr_bindings.attr, | |
d7b1813a | 1608 | &bus_attr_features.attr, |
fe137230 | 1609 | NULL, |
1534c382 | 1610 | }; |
8cb4c20f JW |
1611 | ATTRIBUTE_GROUPS(ap_bus); |
1612 | ||
5b431787 | 1613 | static const struct bus_type ap_bus_type = { |
8cb4c20f JW |
1614 | .name = "ap", |
1615 | .bus_groups = ap_bus_groups, | |
1616 | .match = &ap_bus_match, | |
1617 | .uevent = &ap_uevent, | |
95c09f03 JW |
1618 | .probe = ap_device_probe, |
1619 | .remove = ap_device_remove, | |
8cb4c20f | 1620 | }; |
1534c382 MS |
1621 | |
1622 | /** | |
1c472d46 HP |
1623 | * ap_select_domain(): Select an AP domain if possible and we haven't |
1624 | * already done so before. | |
1534c382 | 1625 | */ |
1c472d46 | 1626 | static void ap_select_domain(void) |
1534c382 | 1627 | { |
6acbe21f | 1628 | struct ap_queue_status status; |
c8337c47 | 1629 | int card, dom; |
1534c382 | 1630 | |
1749a81d | 1631 | /* |
c8337c47 HF |
1632 | * Choose the default domain. Either the one specified with |
1633 | * the "domain=" parameter or the first domain with at least | |
1634 | * one valid APQN. | |
1534c382 | 1635 | */ |
fc1d3f02 IT |
1636 | spin_lock_bh(&ap_domain_lock); |
1637 | if (ap_domain_index >= 0) { | |
1534c382 | 1638 | /* Domain has already been selected. */ |
c8337c47 | 1639 | goto out; |
fc1d3f02 | 1640 | } |
c8337c47 HF |
1641 | for (dom = 0; dom <= ap_max_domain_id; dom++) { |
1642 | if (!ap_test_config_usage_domain(dom) || | |
1643 | !test_bit_inv(dom, ap_perms.aqm)) | |
75014550 | 1644 | continue; |
c8337c47 HF |
1645 | for (card = 0; card <= ap_max_adapter_id; card++) { |
1646 | if (!ap_test_config_card_id(card) || | |
1647 | !test_bit_inv(card, ap_perms.apm)) | |
75014550 | 1648 | continue; |
c8337c47 | 1649 | status = ap_test_queue(AP_MKQID(card, dom), |
e7fc5146 TK |
1650 | ap_apft_available(), |
1651 | NULL); | |
c8337c47 HF |
1652 | if (status.response_code == AP_RESPONSE_NORMAL) |
1653 | break; | |
1534c382 | 1654 | } |
c8337c47 HF |
1655 | if (card <= ap_max_adapter_id) |
1656 | break; | |
1534c382 | 1657 | } |
c8337c47 HF |
1658 | if (dom <= ap_max_domain_id) { |
1659 | ap_domain_index = dom; | |
2ea2a609 HF |
1660 | AP_DBF_INFO("%s new default domain is %d\n", |
1661 | __func__, ap_domain_index); | |
1534c382 | 1662 | } |
c8337c47 | 1663 | out: |
fc1d3f02 | 1664 | spin_unlock_bh(&ap_domain_lock); |
1534c382 MS |
1665 | } |
1666 | ||
9a564108 HF |
1667 | /* |
1668 | * This function checks the type and returns either 0 for not | |
1669 | * supported or the highest compatible type value (which may | |
1670 | * include the input type value). | |
1671 | */ | |
1672 | static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func) | |
1673 | { | |
1674 | int comp_type = 0; | |
1675 | ||
5ac8c724 HF |
1676 | /* < CEX4 is not supported */ |
1677 | if (rawtype < AP_DEVICE_TYPE_CEX4) { | |
3f74eb5f HF |
1678 | AP_DBF_WARN("%s queue=%02x.%04x unsupported type %d\n", |
1679 | __func__, AP_QID_CARD(qid), | |
1680 | AP_QID_QUEUE(qid), rawtype); | |
9a564108 | 1681 | return 0; |
2ea2a609 | 1682 | } |
985214af HF |
1683 | /* up to CEX8 known and fully supported */ |
1684 | if (rawtype <= AP_DEVICE_TYPE_CEX8) | |
9a564108 HF |
1685 | return rawtype; |
1686 | /* | |
985214af | 1687 | * unknown new type > CEX8, check for compatibility |
9a564108 | 1688 | * to the highest known and supported type which is |
985214af | 1689 | * currently CEX8 with the help of the QACT function. |
9a564108 HF |
1690 | */ |
1691 | if (ap_qact_available()) { | |
1692 | struct ap_queue_status status; | |
56c5c683 | 1693 | union ap_qact_ap_info apinfo = {0}; |
9a564108 HF |
1694 | |
1695 | apinfo.mode = (func >> 26) & 0x07; | |
985214af | 1696 | apinfo.cat = AP_DEVICE_TYPE_CEX8; |
9a564108 | 1697 | status = ap_qact(qid, 0, &apinfo); |
2004b57c | 1698 | if (status.response_code == AP_RESPONSE_NORMAL && |
5ac8c724 | 1699 | apinfo.cat >= AP_DEVICE_TYPE_CEX4 && |
2004b57c | 1700 | apinfo.cat <= AP_DEVICE_TYPE_CEX8) |
9a564108 HF |
1701 | comp_type = apinfo.cat; |
1702 | } | |
1703 | if (!comp_type) | |
3f74eb5f HF |
1704 | AP_DBF_WARN("%s queue=%02x.%04x unable to map type %d\n", |
1705 | __func__, AP_QID_CARD(qid), | |
1706 | AP_QID_QUEUE(qid), rawtype); | |
9a564108 | 1707 | else if (comp_type != rawtype) |
3f74eb5f HF |
1708 | AP_DBF_INFO("%s queue=%02x.%04x map type %d to %d\n", |
1709 | __func__, AP_QID_CARD(qid), AP_QID_QUEUE(qid), | |
2ea2a609 | 1710 | rawtype, comp_type); |
9a564108 HF |
1711 | return comp_type; |
1712 | } | |
1713 | ||
e28d2af4 | 1714 | /* |
a7b1868a | 1715 | * Helper function to be used with bus_find_dev |
e28d2af4 | 1716 | * matches for the card device with the given id |
1534c382 | 1717 | */ |
418e3ea1 | 1718 | static int __match_card_device_with_id(struct device *dev, const void *data) |
1534c382 | 1719 | { |
2004b57c | 1720 | return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long)(void *)data; |
1534c382 MS |
1721 | } |
1722 | ||
a7b1868a HF |
1723 | /* |
1724 | * Helper function to be used with bus_find_dev | |
e28d2af4 IT |
1725 | * matches for the queue device with a given qid |
1726 | */ | |
418e3ea1 | 1727 | static int __match_queue_device_with_qid(struct device *dev, const void *data) |
e28d2af4 | 1728 | { |
2004b57c | 1729 | return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long)data; |
e28d2af4 IT |
1730 | } |
1731 | ||
b1af7528 HF |
1732 | /* |
1733 | * Helper function to be used with bus_find_dev | |
1734 | * matches any queue device with given queue id | |
1735 | */ | |
418e3ea1 | 1736 | static int __match_queue_device_with_queue_id(struct device *dev, const void *data) |
b1af7528 | 1737 | { |
2004b57c HF |
1738 | return is_queue_dev(dev) && |
1739 | AP_QID_QUEUE(to_ap_queue(dev)->qid) == (int)(long)data; | |
b1af7528 HF |
1740 | } |
1741 | ||
28391585 TK |
1742 | /* Helper function for notify_config_changed */ |
1743 | static int __drv_notify_config_changed(struct device_driver *drv, void *data) | |
1744 | { | |
1745 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1746 | ||
1747 | if (try_module_get(drv->owner)) { | |
1748 | if (ap_drv->on_config_changed) | |
1749 | ap_drv->on_config_changed(ap_qci_info, ap_qci_info_old); | |
1750 | module_put(drv->owner); | |
1751 | } | |
1752 | ||
1753 | return 0; | |
1754 | } | |
1755 | ||
1756 | /* Notify all drivers about an qci config change */ | |
1757 | static inline void notify_config_changed(void) | |
1758 | { | |
1759 | bus_for_each_drv(&ap_bus_type, NULL, NULL, | |
1760 | __drv_notify_config_changed); | |
1761 | } | |
1762 | ||
1763 | /* Helper function for notify_scan_complete */ | |
1764 | static int __drv_notify_scan_complete(struct device_driver *drv, void *data) | |
1765 | { | |
1766 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1767 | ||
1768 | if (try_module_get(drv->owner)) { | |
1769 | if (ap_drv->on_scan_complete) | |
1770 | ap_drv->on_scan_complete(ap_qci_info, | |
1771 | ap_qci_info_old); | |
1772 | module_put(drv->owner); | |
1773 | } | |
1774 | ||
1775 | return 0; | |
1776 | } | |
1777 | ||
1778 | /* Notify all drivers about bus scan complete */ | |
1779 | static inline void notify_scan_complete(void) | |
1780 | { | |
1781 | bus_for_each_drv(&ap_bus_type, NULL, NULL, | |
1782 | __drv_notify_scan_complete); | |
1783 | } | |
1784 | ||
a7b1868a HF |
1785 | /* |
1786 | * Helper function for ap_scan_bus(). | |
4f2fcccd HF |
1787 | * Remove card device and associated queue devices. |
1788 | */ | |
1789 | static inline void ap_scan_rm_card_dev_and_queue_devs(struct ap_card *ac) | |
1790 | { | |
1791 | bus_for_each_dev(&ap_bus_type, NULL, | |
2004b57c | 1792 | (void *)(long)ac->id, |
4f2fcccd HF |
1793 | __ap_queue_devices_with_id_unregister); |
1794 | device_unregister(&ac->ap_dev.device); | |
1795 | } | |
1796 | ||
1797 | /* | |
1798 | * Helper function for ap_scan_bus(). | |
1799 | * Does the scan bus job for all the domains within | |
1800 | * a valid adapter given by an ap_card ptr. | |
e28d2af4 | 1801 | */ |
4f2fcccd | 1802 | static inline void ap_scan_domains(struct ap_card *ac) |
1534c382 | 1803 | { |
d4c53ae8 | 1804 | struct ap_tapq_hwinfo hwinfo; |
a7e701db | 1805 | bool decfg, chkstop; |
a7b1868a | 1806 | struct ap_queue *aq; |
038c5bed | 1807 | struct device *dev; |
038c5bed | 1808 | ap_qid_t qid; |
d4c53ae8 | 1809 | int rc, dom; |
4f2fcccd HF |
1810 | |
1811 | /* | |
1812 | * Go through the configuration for the domains and compare them | |
1813 | * to the existing queue devices. Also take care of the config | |
1814 | * and error state for the queue devices. | |
1815 | */ | |
1816 | ||
1817 | for (dom = 0; dom <= ap_max_domain_id; dom++) { | |
1818 | qid = AP_MKQID(ac->id, dom); | |
1819 | dev = bus_find_device(&ap_bus_type, NULL, | |
2004b57c | 1820 | (void *)(long)qid, |
4f2fcccd HF |
1821 | __match_queue_device_with_qid); |
1822 | aq = dev ? to_ap_queue(dev) : NULL; | |
1823 | if (!ap_test_config_usage_domain(dom)) { | |
1824 | if (dev) { | |
3f74eb5f | 1825 | AP_DBF_INFO("%s(%d,%d) not in config anymore, rm queue dev\n", |
4f2fcccd HF |
1826 | __func__, ac->id, dom); |
1827 | device_unregister(dev); | |
4f2fcccd | 1828 | } |
038c5bed | 1829 | goto put_dev_and_continue; |
4f2fcccd HF |
1830 | } |
1831 | /* domain is valid, get info from this APQN */ | |
d4c53ae8 | 1832 | rc = ap_queue_info(qid, &hwinfo, &decfg, &chkstop); |
038c5bed HF |
1833 | switch (rc) { |
1834 | case -1: | |
1835 | if (dev) { | |
3f74eb5f HF |
1836 | AP_DBF_INFO("%s(%d,%d) queue_info() failed, rm queue dev\n", |
1837 | __func__, ac->id, dom); | |
4f2fcccd | 1838 | device_unregister(dev); |
4f2fcccd | 1839 | } |
038c5bed HF |
1840 | fallthrough; |
1841 | case 0: | |
1842 | goto put_dev_and_continue; | |
1843 | default: | |
1844 | break; | |
4f2fcccd HF |
1845 | } |
1846 | /* if no queue device exists, create a new one */ | |
1847 | if (!aq) { | |
1848 | aq = ap_queue_create(qid, ac->ap_dev.device_type); | |
1849 | if (!aq) { | |
1850 | AP_DBF_WARN("%s(%d,%d) ap_queue_create() failed\n", | |
1851 | __func__, ac->id, dom); | |
1852 | continue; | |
1853 | } | |
1854 | aq->card = ac; | |
1855 | aq->config = !decfg; | |
a7e701db | 1856 | aq->chkstop = chkstop; |
207022d3 | 1857 | aq->se_bstate = hwinfo.bs; |
4f2fcccd HF |
1858 | dev = &aq->ap_dev.device; |
1859 | dev->bus = &ap_bus_type; | |
1860 | dev->parent = &ac->ap_dev.device; | |
1861 | dev_set_name(dev, "%02x.%04x", ac->id, dom); | |
1862 | /* register queue device */ | |
1863 | rc = device_register(dev); | |
1864 | if (rc) { | |
1865 | AP_DBF_WARN("%s(%d,%d) device_register() failed\n", | |
1866 | __func__, ac->id, dom); | |
1867 | goto put_dev_and_continue; | |
1868 | } | |
29c2680f HF |
1869 | /* get it and thus adjust reference counter */ |
1870 | get_device(dev); | |
32d1d920 | 1871 | if (decfg) { |
3f74eb5f | 1872 | AP_DBF_INFO("%s(%d,%d) new (decfg) queue dev created\n", |
4f2fcccd | 1873 | __func__, ac->id, dom); |
32d1d920 | 1874 | } else if (chkstop) { |
a7e701db HF |
1875 | AP_DBF_INFO("%s(%d,%d) new (chkstop) queue dev created\n", |
1876 | __func__, ac->id, dom); | |
32d1d920 HF |
1877 | } else { |
1878 | /* nudge the queue's state machine */ | |
1879 | ap_queue_init_state(aq); | |
3f74eb5f | 1880 | AP_DBF_INFO("%s(%d,%d) new queue dev created\n", |
4f2fcccd | 1881 | __func__, ac->id, dom); |
32d1d920 | 1882 | } |
4f2fcccd HF |
1883 | goto put_dev_and_continue; |
1884 | } | |
a7e701db | 1885 | /* handle state changes on already existing queue device */ |
4f2fcccd | 1886 | spin_lock_bh(&aq->lock); |
207022d3 HF |
1887 | /* SE bind state */ |
1888 | aq->se_bstate = hwinfo.bs; | |
a7e701db HF |
1889 | /* checkstop state */ |
1890 | if (chkstop && !aq->chkstop) { | |
1891 | /* checkstop on */ | |
1892 | aq->chkstop = true; | |
1893 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1894 | aq->dev_state = AP_DEV_STATE_ERROR; | |
1895 | aq->last_err_rc = AP_RESPONSE_CHECKSTOPPED; | |
1896 | } | |
1897 | spin_unlock_bh(&aq->lock); | |
08b2c370 HF |
1898 | pr_debug("%s(%d,%d) queue dev checkstop on\n", |
1899 | __func__, ac->id, dom); | |
a7e701db HF |
1900 | /* 'receive' pending messages with -EAGAIN */ |
1901 | ap_flush_queue(aq); | |
1902 | goto put_dev_and_continue; | |
1903 | } else if (!chkstop && aq->chkstop) { | |
1904 | /* checkstop off */ | |
1905 | aq->chkstop = false; | |
32d1d920 HF |
1906 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) |
1907 | _ap_queue_init_state(aq); | |
a7e701db | 1908 | spin_unlock_bh(&aq->lock); |
08b2c370 HF |
1909 | pr_debug("%s(%d,%d) queue dev checkstop off\n", |
1910 | __func__, ac->id, dom); | |
a7e701db HF |
1911 | goto put_dev_and_continue; |
1912 | } | |
1913 | /* config state change */ | |
4f2fcccd HF |
1914 | if (decfg && aq->config) { |
1915 | /* config off this queue device */ | |
1916 | aq->config = false; | |
1917 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1918 | aq->dev_state = AP_DEV_STATE_ERROR; | |
1919 | aq->last_err_rc = AP_RESPONSE_DECONFIGURED; | |
1920 | } | |
1921 | spin_unlock_bh(&aq->lock); | |
08b2c370 HF |
1922 | pr_debug("%s(%d,%d) queue dev config off\n", |
1923 | __func__, ac->id, dom); | |
df6f508c | 1924 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
4f2fcccd HF |
1925 | /* 'receive' pending messages with -EAGAIN */ |
1926 | ap_flush_queue(aq); | |
1927 | goto put_dev_and_continue; | |
a7e701db | 1928 | } else if (!decfg && !aq->config) { |
4f2fcccd HF |
1929 | /* config on this queue device */ |
1930 | aq->config = true; | |
32d1d920 HF |
1931 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) |
1932 | _ap_queue_init_state(aq); | |
4f2fcccd | 1933 | spin_unlock_bh(&aq->lock); |
08b2c370 HF |
1934 | pr_debug("%s(%d,%d) queue dev config on\n", |
1935 | __func__, ac->id, dom); | |
df6f508c | 1936 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
4f2fcccd HF |
1937 | goto put_dev_and_continue; |
1938 | } | |
1939 | /* handle other error states */ | |
1940 | if (!decfg && aq->dev_state == AP_DEV_STATE_ERROR) { | |
1941 | spin_unlock_bh(&aq->lock); | |
1942 | /* 'receive' pending messages with -EAGAIN */ | |
1943 | ap_flush_queue(aq); | |
1944 | /* re-init (with reset) the queue device */ | |
1945 | ap_queue_init_state(aq); | |
3f74eb5f | 1946 | AP_DBF_INFO("%s(%d,%d) queue dev reinit enforced\n", |
4f2fcccd HF |
1947 | __func__, ac->id, dom); |
1948 | goto put_dev_and_continue; | |
1949 | } | |
1950 | spin_unlock_bh(&aq->lock); | |
1951 | put_dev_and_continue: | |
1952 | put_device(dev); | |
1953 | } | |
1954 | } | |
1955 | ||
1956 | /* | |
1957 | * Helper function for ap_scan_bus(). | |
1958 | * Does the scan bus job for the given adapter id. | |
1959 | */ | |
1960 | static inline void ap_scan_adapter(int ap) | |
1961 | { | |
d4c53ae8 HF |
1962 | struct ap_tapq_hwinfo hwinfo; |
1963 | int rc, dom, comp_type; | |
a7e701db | 1964 | bool decfg, chkstop; |
4f2fcccd | 1965 | struct ap_card *ac; |
038c5bed | 1966 | struct device *dev; |
038c5bed | 1967 | ap_qid_t qid; |
a7b1868a | 1968 | |
4f2fcccd | 1969 | /* Is there currently a card device for this adapter ? */ |
a7b1868a | 1970 | dev = bus_find_device(&ap_bus_type, NULL, |
2004b57c | 1971 | (void *)(long)ap, |
a7b1868a HF |
1972 | __match_card_device_with_id); |
1973 | ac = dev ? to_ap_card(dev) : NULL; | |
4f2fcccd HF |
1974 | |
1975 | /* Adapter not in configuration ? */ | |
1976 | if (!ap_test_config_card_id(ap)) { | |
1977 | if (ac) { | |
3f74eb5f | 1978 | AP_DBF_INFO("%s(%d) ap not in config any more, rm card and queue devs\n", |
4f2fcccd HF |
1979 | __func__, ap); |
1980 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
a7b1868a HF |
1981 | put_device(dev); |
1982 | } | |
1983 | return; | |
1984 | } | |
cccd85bf | 1985 | |
a7b1868a | 1986 | /* |
4f2fcccd HF |
1987 | * Adapter ap is valid in the current configuration. So do some checks: |
1988 | * If no card device exists, build one. If a card device exists, check | |
1989 | * for type and functions changed. For all this we need to find a valid | |
1990 | * APQN first. | |
a7b1868a | 1991 | */ |
4f2fcccd HF |
1992 | |
1993 | for (dom = 0; dom <= ap_max_domain_id; dom++) | |
1994 | if (ap_test_config_usage_domain(dom)) { | |
1995 | qid = AP_MKQID(ap, dom); | |
d4c53ae8 | 1996 | if (ap_queue_info(qid, &hwinfo, &decfg, &chkstop) > 0) |
a7b1868a HF |
1997 | break; |
1998 | } | |
4f2fcccd | 1999 | if (dom > ap_max_domain_id) { |
038c5bed | 2000 | /* Could not find one valid APQN for this adapter */ |
4f2fcccd | 2001 | if (ac) { |
3f74eb5f HF |
2002 | AP_DBF_INFO("%s(%d) no type info (no APQN found), rm card and queue devs\n", |
2003 | __func__, ap); | |
4f2fcccd HF |
2004 | ap_scan_rm_card_dev_and_queue_devs(ac); |
2005 | put_device(dev); | |
2006 | } else { | |
08b2c370 HF |
2007 | pr_debug("%s(%d) no type info (no APQN found), ignored\n", |
2008 | __func__, ap); | |
a7b1868a | 2009 | } |
4f2fcccd HF |
2010 | return; |
2011 | } | |
d4c53ae8 | 2012 | if (!hwinfo.at) { |
4f2fcccd HF |
2013 | /* No apdater type info available, an unusable adapter */ |
2014 | if (ac) { | |
3f74eb5f | 2015 | AP_DBF_INFO("%s(%d) no valid type (0) info, rm card and queue devs\n", |
4f2fcccd HF |
2016 | __func__, ap); |
2017 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
a7b1868a | 2018 | put_device(dev); |
4f2fcccd | 2019 | } else { |
08b2c370 HF |
2020 | pr_debug("%s(%d) no valid type (0) info, ignored\n", |
2021 | __func__, ap); | |
a7b1868a | 2022 | } |
4f2fcccd | 2023 | return; |
a7b1868a | 2024 | } |
d4c53ae8 | 2025 | hwinfo.value &= TAPQ_CARD_HWINFO_MASK; /* filter card specific hwinfo */ |
4f2fcccd HF |
2026 | if (ac) { |
2027 | /* Check APQN against existing card device for changes */ | |
d4c53ae8 | 2028 | if (ac->hwinfo.at != hwinfo.at) { |
3f74eb5f | 2029 | AP_DBF_INFO("%s(%d) hwtype %d changed, rm card and queue devs\n", |
d4c53ae8 | 2030 | __func__, ap, hwinfo.at); |
4f2fcccd HF |
2031 | ap_scan_rm_card_dev_and_queue_devs(ac); |
2032 | put_device(dev); | |
2033 | ac = NULL; | |
d4c53ae8 | 2034 | } else if (ac->hwinfo.fac != hwinfo.fac) { |
3f74eb5f | 2035 | AP_DBF_INFO("%s(%d) functions 0x%08x changed, rm card and queue devs\n", |
d4c53ae8 | 2036 | __func__, ap, hwinfo.fac); |
4f2fcccd HF |
2037 | ap_scan_rm_card_dev_and_queue_devs(ac); |
2038 | put_device(dev); | |
2039 | ac = NULL; | |
2040 | } else { | |
a7e701db HF |
2041 | /* handle checkstop state change */ |
2042 | if (chkstop && !ac->chkstop) { | |
2043 | /* checkstop on */ | |
2044 | ac->chkstop = true; | |
2045 | AP_DBF_INFO("%s(%d) card dev checkstop on\n", | |
2046 | __func__, ap); | |
2047 | } else if (!chkstop && ac->chkstop) { | |
2048 | /* checkstop off */ | |
2049 | ac->chkstop = false; | |
2050 | AP_DBF_INFO("%s(%d) card dev checkstop off\n", | |
2051 | __func__, ap); | |
2052 | } | |
2053 | /* handle config state change */ | |
4f2fcccd HF |
2054 | if (decfg && ac->config) { |
2055 | ac->config = false; | |
3f74eb5f | 2056 | AP_DBF_INFO("%s(%d) card dev config off\n", |
4f2fcccd | 2057 | __func__, ap); |
df6f508c | 2058 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
a7e701db | 2059 | } else if (!decfg && !ac->config) { |
4f2fcccd | 2060 | ac->config = true; |
3f74eb5f | 2061 | AP_DBF_INFO("%s(%d) card dev config on\n", |
4f2fcccd | 2062 | __func__, ap); |
df6f508c | 2063 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
b1af7528 | 2064 | } |
a7b1868a | 2065 | } |
4f2fcccd HF |
2066 | } |
2067 | ||
2068 | if (!ac) { | |
2069 | /* Build a new card device */ | |
d4c53ae8 | 2070 | comp_type = ap_get_compatible_type(qid, hwinfo.at, hwinfo.fac); |
4f2fcccd HF |
2071 | if (!comp_type) { |
2072 | AP_DBF_WARN("%s(%d) type %d, can't get compatibility type\n", | |
d4c53ae8 | 2073 | __func__, ap, hwinfo.at); |
4f2fcccd HF |
2074 | return; |
2075 | } | |
d4c53ae8 | 2076 | ac = ap_card_create(ap, hwinfo, comp_type); |
a7b1868a | 2077 | if (!ac) { |
4f2fcccd HF |
2078 | AP_DBF_WARN("%s(%d) ap_card_create() failed\n", |
2079 | __func__, ap); | |
2080 | return; | |
a7b1868a | 2081 | } |
4f2fcccd | 2082 | ac->config = !decfg; |
a7e701db | 2083 | ac->chkstop = chkstop; |
4f2fcccd HF |
2084 | dev = &ac->ap_dev.device; |
2085 | dev->bus = &ap_bus_type; | |
2086 | dev->parent = ap_root_device; | |
2087 | dev_set_name(dev, "card%02x", ap); | |
bd39654a HF |
2088 | /* maybe enlarge ap_max_msg_size to support this card */ |
2089 | if (ac->maxmsgsize > atomic_read(&ap_max_msg_size)) { | |
2090 | atomic_set(&ap_max_msg_size, ac->maxmsgsize); | |
2091 | AP_DBF_INFO("%s(%d) ap_max_msg_size update to %d byte\n", | |
3f74eb5f HF |
2092 | __func__, ap, |
2093 | atomic_read(&ap_max_msg_size)); | |
bd39654a | 2094 | } |
4f2fcccd HF |
2095 | /* Register the new card device with AP bus */ |
2096 | rc = device_register(dev); | |
a7b1868a | 2097 | if (rc) { |
4f2fcccd HF |
2098 | AP_DBF_WARN("%s(%d) device_register() failed\n", |
2099 | __func__, ap); | |
2100 | put_device(dev); | |
2101 | return; | |
3f3007af | 2102 | } |
4f2fcccd HF |
2103 | /* get it and thus adjust reference counter */ |
2104 | get_device(dev); | |
2105 | if (decfg) | |
3f74eb5f | 2106 | AP_DBF_INFO("%s(%d) new (decfg) card dev type=%d func=0x%08x created\n", |
d4c53ae8 | 2107 | __func__, ap, hwinfo.at, hwinfo.fac); |
a7e701db HF |
2108 | else if (chkstop) |
2109 | AP_DBF_INFO("%s(%d) new (chkstop) card dev type=%d func=0x%08x created\n", | |
d4c53ae8 | 2110 | __func__, ap, hwinfo.at, hwinfo.fac); |
4f2fcccd | 2111 | else |
3f74eb5f | 2112 | AP_DBF_INFO("%s(%d) new card dev type=%d func=0x%08x created\n", |
d4c53ae8 | 2113 | __func__, ap, hwinfo.at, hwinfo.fac); |
4f2fcccd HF |
2114 | } |
2115 | ||
2116 | /* Verify the domains and the queue devices for this card */ | |
2117 | ap_scan_domains(ac); | |
a7b1868a | 2118 | |
4f2fcccd HF |
2119 | /* release the card device */ |
2120 | put_device(&ac->ap_dev.device); | |
a7b1868a | 2121 | } |
ac994e80 | 2122 | |
28391585 TK |
2123 | /** |
2124 | * ap_get_configuration - get the host AP configuration | |
2125 | * | |
2126 | * Stores the host AP configuration information returned from the previous call | |
2127 | * to Query Configuration Information (QCI), then retrieves and stores the | |
2128 | * current AP configuration returned from QCI. | |
2129 | * | |
2130 | * Return: true if the host AP configuration changed between calls to QCI; | |
2131 | * otherwise, return false. | |
2132 | */ | |
2133 | static bool ap_get_configuration(void) | |
2134 | { | |
8dec9cb9 | 2135 | if (!ap_qci_info->flags) /* QCI not supported */ |
0fef40be HF |
2136 | return false; |
2137 | ||
28391585 | 2138 | memcpy(ap_qci_info_old, ap_qci_info, sizeof(*ap_qci_info)); |
8dec9cb9 | 2139 | ap_qci(ap_qci_info); |
28391585 TK |
2140 | |
2141 | return memcmp(ap_qci_info, ap_qci_info_old, | |
2142 | sizeof(struct ap_config_info)) != 0; | |
2143 | } | |
2144 | ||
778412ab HF |
2145 | /* |
2146 | * ap_config_has_new_aps - Check current against old qci info if | |
2147 | * new adapters have appeared. Returns true if at least one new | |
2148 | * adapter in the apm mask is showing up. Existing adapters or | |
2149 | * receding adapters are not counted. | |
2150 | */ | |
2151 | static bool ap_config_has_new_aps(void) | |
2152 | { | |
2153 | ||
2154 | unsigned long m[BITS_TO_LONGS(AP_DEVICES)]; | |
2155 | ||
8dec9cb9 | 2156 | if (!ap_qci_info->flags) |
778412ab HF |
2157 | return false; |
2158 | ||
2159 | bitmap_andnot(m, (unsigned long *)ap_qci_info->apm, | |
2160 | (unsigned long *)ap_qci_info_old->apm, AP_DEVICES); | |
2161 | if (!bitmap_empty(m, AP_DEVICES)) | |
2162 | return true; | |
2163 | ||
2164 | return false; | |
2165 | } | |
2166 | ||
2167 | /* | |
2168 | * ap_config_has_new_doms - Check current against old qci info if | |
2169 | * new (usage) domains have appeared. Returns true if at least one | |
2170 | * new domain in the aqm mask is showing up. Existing domains or | |
2171 | * receding domains are not counted. | |
2172 | */ | |
2173 | static bool ap_config_has_new_doms(void) | |
2174 | { | |
2175 | unsigned long m[BITS_TO_LONGS(AP_DOMAINS)]; | |
2176 | ||
8dec9cb9 | 2177 | if (!ap_qci_info->flags) |
778412ab HF |
2178 | return false; |
2179 | ||
2180 | bitmap_andnot(m, (unsigned long *)ap_qci_info->aqm, | |
2181 | (unsigned long *)ap_qci_info_old->aqm, AP_DOMAINS); | |
2182 | if (!bitmap_empty(m, AP_DOMAINS)) | |
2183 | return true; | |
2184 | ||
2185 | return false; | |
2186 | } | |
2187 | ||
a7b1868a HF |
2188 | /** |
2189 | * ap_scan_bus(): Scan the AP bus for new devices | |
eacf5b36 HF |
2190 | * Always run under mutex ap_scan_bus_mutex protection |
2191 | * which needs to get locked/unlocked by the caller! | |
b5caf05e | 2192 | * Returns true if any config change has been detected |
eacf5b36 | 2193 | * during the scan, otherwise false. |
a7b1868a | 2194 | */ |
b5caf05e | 2195 | static bool ap_scan_bus(void) |
a7b1868a | 2196 | { |
b5caf05e HF |
2197 | bool config_changed; |
2198 | int ap; | |
a7b1868a | 2199 | |
08b2c370 HF |
2200 | pr_debug(">%s\n", __func__); |
2201 | ||
778412ab | 2202 | /* (re-)fetch configuration via QCI */ |
28391585 | 2203 | config_changed = ap_get_configuration(); |
778412ab HF |
2204 | if (config_changed) { |
2205 | if (ap_config_has_new_aps() || ap_config_has_new_doms()) { | |
2206 | /* | |
2207 | * Appearance of new adapters and/or domains need to | |
2208 | * build new ap devices which need to get bound to an | |
2209 | * device driver. Thus reset the APQN bindings complete | |
2210 | * completion. | |
2211 | */ | |
2212 | reinit_completion(&ap_apqn_bindings_complete); | |
2213 | } | |
2214 | /* post a config change notify */ | |
28391585 | 2215 | notify_config_changed(); |
778412ab | 2216 | } |
a7b1868a HF |
2217 | ap_select_domain(); |
2218 | ||
2219 | /* loop over all possible adapters */ | |
4f2fcccd HF |
2220 | for (ap = 0; ap <= ap_max_adapter_id; ap++) |
2221 | ap_scan_adapter(ap); | |
a7b1868a | 2222 | |
28391585 TK |
2223 | /* scan complete notify */ |
2224 | if (config_changed) | |
2225 | notify_scan_complete(); | |
2226 | ||
a7b1868a HF |
2227 | /* check if there is at least one queue available with default domain */ |
2228 | if (ap_domain_index >= 0) { | |
2229 | struct device *dev = | |
2230 | bus_find_device(&ap_bus_type, NULL, | |
2004b57c | 2231 | (void *)(long)ap_domain_index, |
b1af7528 | 2232 | __match_queue_device_with_queue_id); |
a7b1868a HF |
2233 | if (dev) |
2234 | put_device(dev); | |
2235 | else | |
3f74eb5f HF |
2236 | AP_DBF_INFO("%s no queue device with default domain %d available\n", |
2237 | __func__, ap_domain_index); | |
a7b1868a | 2238 | } |
ac994e80 | 2239 | |
837cd105 | 2240 | if (atomic64_inc_return(&ap_scan_bus_count) == 1) { |
08b2c370 | 2241 | pr_debug("%s init scan complete\n", __func__); |
837cd105 | 2242 | ap_send_init_scan_done_uevent(); |
837cd105 HF |
2243 | } |
2244 | ||
778412ab HF |
2245 | ap_check_bindings_complete(); |
2246 | ||
99b3126e | 2247 | mod_timer(&ap_scan_bus_timer, jiffies + ap_scan_bus_time * HZ); |
08b2c370 | 2248 | |
b5caf05e HF |
2249 | pr_debug("<%s config_changed=%d\n", __func__, config_changed); |
2250 | ||
2251 | return config_changed; | |
1534c382 MS |
2252 | } |
2253 | ||
99b3126e HF |
2254 | /* |
2255 | * Callback for the ap_scan_bus_timer | |
b5caf05e | 2256 | * Runs periodically, workqueue timer (ap_scan_bus_time) |
99b3126e HF |
2257 | */ |
2258 | static void ap_scan_bus_timer_callback(struct timer_list *unused) | |
1534c382 | 2259 | { |
99b3126e HF |
2260 | /* |
2261 | * schedule work into the system long wq which when | |
2262 | * the work is finally executed, calls the AP bus scan. | |
2263 | */ | |
2264 | queue_work(system_long_wq, &ap_scan_bus_work); | |
1534c382 | 2265 | } |
13e742ba | 2266 | |
b5caf05e HF |
2267 | /* |
2268 | * Callback for the ap_scan_bus_work | |
2269 | */ | |
2270 | static void ap_scan_bus_wq_callback(struct work_struct *unused) | |
2271 | { | |
eacf5b36 HF |
2272 | /* |
2273 | * Try to invoke an ap_scan_bus(). If the mutex acquisition | |
2274 | * fails there is currently another task already running the | |
2275 | * AP scan bus and there is no need to wait and re-trigger the | |
2276 | * scan again. Please note at the end of the scan bus function | |
2277 | * the AP scan bus timer is re-armed which triggers then the | |
2278 | * ap_scan_bus_timer_callback which enqueues a work into the | |
2279 | * system_long_wq which invokes this function here again. | |
2280 | */ | |
2281 | if (mutex_trylock(&ap_scan_bus_mutex)) { | |
2282 | ap_scan_bus_result = ap_scan_bus(); | |
2283 | mutex_unlock(&ap_scan_bus_mutex); | |
2284 | } | |
b5caf05e HF |
2285 | } |
2286 | ||
12376084 HD |
2287 | static inline void __exit ap_async_exit(void) |
2288 | { | |
2289 | if (ap_thread_flag) | |
2290 | ap_poll_thread_stop(); | |
2291 | chsc_notifier_unregister(&ap_bus_nb); | |
2292 | cancel_work(&ap_scan_bus_work); | |
2293 | hrtimer_cancel(&ap_poll_timer); | |
2294 | timer_delete(&ap_scan_bus_timer); | |
2295 | } | |
2296 | ||
170660cc HD |
2297 | static inline int __init ap_async_init(void) |
2298 | { | |
2299 | int rc; | |
2300 | ||
2301 | /* Setup the AP bus rescan timer. */ | |
2302 | timer_setup(&ap_scan_bus_timer, ap_scan_bus_timer_callback, 0); | |
2303 | ||
2304 | /* | |
2305 | * Setup the high resolution poll timer. | |
2306 | * If we are running under z/VM adjust polling to z/VM polling rate. | |
2307 | */ | |
2308 | if (MACHINE_IS_VM) | |
2309 | poll_high_timeout = 1500000; | |
2310 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); | |
2311 | ap_poll_timer.function = ap_poll_timeout; | |
2312 | ||
2313 | queue_work(system_long_wq, &ap_scan_bus_work); | |
2314 | ||
2a483d33 HD |
2315 | rc = chsc_notifier_register(&ap_bus_nb); |
2316 | if (rc) | |
2317 | goto out; | |
2318 | ||
170660cc HD |
2319 | /* Start the low priority AP bus poll thread. */ |
2320 | if (!ap_thread_flag) | |
2321 | return 0; | |
2322 | ||
2323 | rc = ap_poll_thread_start(); | |
2324 | if (rc) | |
2a483d33 | 2325 | goto out_notifier; |
170660cc HD |
2326 | |
2327 | return 0; | |
2328 | ||
2a483d33 HD |
2329 | out_notifier: |
2330 | chsc_notifier_unregister(&ap_bus_nb); | |
170660cc HD |
2331 | out: |
2332 | cancel_work(&ap_scan_bus_work); | |
2333 | hrtimer_cancel(&ap_poll_timer); | |
2334 | timer_delete(&ap_scan_bus_timer); | |
2335 | return rc; | |
2336 | } | |
2337 | ||
2338 | static inline void ap_irq_exit(void) | |
2339 | { | |
2340 | if (ap_irq_flag) | |
2341 | unregister_adapter_interrupt(&ap_airq); | |
2342 | } | |
2343 | ||
2344 | static inline int __init ap_irq_init(void) | |
2345 | { | |
2346 | int rc; | |
2347 | ||
2348 | if (!ap_interrupts_available() || !ap_useirq) | |
2349 | return 0; | |
2350 | ||
2351 | rc = register_adapter_interrupt(&ap_airq); | |
2352 | ap_irq_flag = (rc == 0); | |
2353 | ||
2354 | return rc; | |
2355 | } | |
2356 | ||
2357 | static inline void ap_debug_exit(void) | |
2358 | { | |
2359 | debug_unregister(ap_dbf_info); | |
2360 | } | |
2361 | ||
2362 | static inline int __init ap_debug_init(void) | |
cccd85bf | 2363 | { |
3f74eb5f | 2364 | ap_dbf_info = debug_register("ap", 2, 1, |
88e4c0da | 2365 | AP_DBF_MAX_SPRINTF_ARGS * sizeof(long)); |
cccd85bf HF |
2366 | debug_register_view(ap_dbf_info, &debug_sprintf_view); |
2367 | debug_set_level(ap_dbf_info, DBF_ERR); | |
2368 | ||
2369 | return 0; | |
2370 | } | |
2371 | ||
7e0bdbe5 HF |
2372 | static void __init ap_perms_init(void) |
2373 | { | |
2004b57c | 2374 | /* all resources usable if no kernel parameter string given */ |
00fab235 | 2375 | memset(&ap_perms.ioctlm, 0xFF, sizeof(ap_perms.ioctlm)); |
7e0bdbe5 HF |
2376 | memset(&ap_perms.apm, 0xFF, sizeof(ap_perms.apm)); |
2377 | memset(&ap_perms.aqm, 0xFF, sizeof(ap_perms.aqm)); | |
2378 | ||
3d8f60d3 | 2379 | /* apm kernel parameter string */ |
7e0bdbe5 | 2380 | if (apm_str) { |
3d8f60d3 | 2381 | memset(&ap_perms.apm, 0, sizeof(ap_perms.apm)); |
00fab235 HF |
2382 | ap_parse_mask_str(apm_str, ap_perms.apm, AP_DEVICES, |
2383 | &ap_perms_mutex); | |
7e0bdbe5 | 2384 | } |
7e0bdbe5 | 2385 | |
3d8f60d3 HF |
2386 | /* aqm kernel parameter string */ |
2387 | if (aqm_str) { | |
2388 | memset(&ap_perms.aqm, 0, sizeof(ap_perms.aqm)); | |
00fab235 HF |
2389 | ap_parse_mask_str(aqm_str, ap_perms.aqm, AP_DOMAINS, |
2390 | &ap_perms_mutex); | |
7e0bdbe5 HF |
2391 | } |
2392 | } | |
2393 | ||
1534c382 | 2394 | /** |
1749a81d FB |
2395 | * ap_module_init(): The module initialization code. |
2396 | * | |
2397 | * Initializes the module. | |
1534c382 | 2398 | */ |
efda7ade | 2399 | static int __init ap_module_init(void) |
1534c382 | 2400 | { |
8cb4c20f | 2401 | int rc; |
1534c382 | 2402 | |
cccd85bf HF |
2403 | rc = ap_debug_init(); |
2404 | if (rc) | |
2405 | return rc; | |
2406 | ||
2395103b | 2407 | if (!ap_instructions_available()) { |
889875a1 MS |
2408 | pr_warn("The hardware system does not support AP instructions\n"); |
2409 | return -ENODEV; | |
2410 | } | |
2411 | ||
bc4b295e HF |
2412 | /* init ap_queue hashtable */ |
2413 | hash_init(ap_queues); | |
2414 | ||
00fab235 | 2415 | /* set up the AP permissions (ioctls, ap and aq masks) */ |
7e0bdbe5 HF |
2416 | ap_perms_init(); |
2417 | ||
889875a1 | 2418 | /* Get AP configuration data if available */ |
c8337c47 HF |
2419 | ap_init_qci_info(); |
2420 | ||
2421 | /* check default domain setting */ | |
2422 | if (ap_domain_index < -1 || ap_domain_index > ap_max_domain_id || | |
7e0bdbe5 HF |
2423 | (ap_domain_index >= 0 && |
2424 | !test_bit_inv(ap_domain_index, ap_perms.aqm))) { | |
889875a1 MS |
2425 | pr_warn("%d is not a valid cryptographic domain\n", |
2426 | ap_domain_index); | |
ac994e80 | 2427 | ap_domain_index = -1; |
1534c382 | 2428 | } |
5314af69 | 2429 | |
1534c382 MS |
2430 | /* Create /sys/bus/ap. */ |
2431 | rc = bus_register(&ap_bus_type); | |
2432 | if (rc) | |
3c7a3773 | 2433 | goto out; |
1534c382 MS |
2434 | |
2435 | /* Create /sys/devices/ap. */ | |
035da16f | 2436 | ap_root_device = root_device_register("ap"); |
9c705206 | 2437 | rc = PTR_ERR_OR_ZERO(ap_root_device); |
1534c382 MS |
2438 | if (rc) |
2439 | goto out_bus; | |
837cd105 | 2440 | ap_root_device->bus = &ap_bus_type; |
1534c382 | 2441 | |
3c7a3773 HD |
2442 | /* enable interrupts if available */ |
2443 | rc = ap_irq_init(); | |
2444 | if (rc) | |
2445 | goto out_device; | |
2446 | ||
170660cc HD |
2447 | /* Setup asynchronous work (timers, workqueue, etc). */ |
2448 | rc = ap_async_init(); | |
2449 | if (rc) | |
3c7a3773 | 2450 | goto out_irq; |
3f3007af | 2451 | |
1534c382 MS |
2452 | return 0; |
2453 | ||
3c7a3773 HD |
2454 | out_irq: |
2455 | ap_irq_exit(); | |
170660cc | 2456 | out_device: |
035da16f | 2457 | root_device_unregister(ap_root_device); |
1534c382 | 2458 | out_bus: |
1534c382 MS |
2459 | bus_unregister(&ap_bus_type); |
2460 | out: | |
170660cc | 2461 | ap_debug_exit(); |
1534c382 MS |
2462 | return rc; |
2463 | } | |
12376084 HD |
2464 | |
2465 | static void __exit ap_module_exit(void) | |
2466 | { | |
2467 | ap_async_exit(); | |
2468 | ap_irq_exit(); | |
2469 | root_device_unregister(ap_root_device); | |
2470 | bus_unregister(&ap_bus_type); | |
2471 | ap_debug_exit(); | |
2472 | } | |
2473 | ||
2474 | module_init(ap_module_init); | |
2475 | module_exit(ap_module_exit); |