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); | |
735 | pr_debug("%s all apqn bindings complete\n", __func__); | |
837cd105 HF |
736 | } |
737 | ap_send_bindings_complete_uevent(); | |
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 | |
e3850508 | 897 | /* Add queue/card to list of active queues/cards */ |
bc4b295e HF |
898 | spin_lock_bh(&ap_queues_lock); |
899 | if (is_queue_dev(dev)) | |
900 | hash_add(ap_queues, &to_ap_queue(dev)->hnode, | |
901 | to_ap_queue(dev)->qid); | |
902 | spin_unlock_bh(&ap_queues_lock); | |
e3850508 | 903 | |
1534c382 | 904 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
e3850508 HF |
905 | |
906 | if (rc) { | |
bc4b295e HF |
907 | spin_lock_bh(&ap_queues_lock); |
908 | if (is_queue_dev(dev)) | |
909 | hash_del(&to_ap_queue(dev)->hnode); | |
910 | spin_unlock_bh(&ap_queues_lock); | |
2004b57c | 911 | } |
e3850508 | 912 | |
29c2680f HF |
913 | out: |
914 | if (rc) | |
915 | put_device(dev); | |
1534c382 MS |
916 | return rc; |
917 | } | |
918 | ||
fc7a6209 | 919 | static void ap_device_remove(struct device *dev) |
1534c382 MS |
920 | { |
921 | struct ap_device *ap_dev = to_ap_dev(dev); | |
c8c68c5f | 922 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
1534c382 | 923 | |
01396a37 | 924 | /* prepare ap queue device removal */ |
104f708f | 925 | if (is_queue_dev(dev)) |
01396a37 HF |
926 | ap_queue_prepare_remove(to_ap_queue(dev)); |
927 | ||
928 | /* driver's chance to clean up gracefully */ | |
e3850508 HF |
929 | if (ap_drv->remove) |
930 | ap_drv->remove(ap_dev); | |
931 | ||
01396a37 HF |
932 | /* now do the ap queue device remove */ |
933 | if (is_queue_dev(dev)) | |
934 | ap_queue_remove(to_ap_queue(dev)); | |
935 | ||
e3850508 | 936 | /* Remove queue/card from list of active queues/cards */ |
bc4b295e HF |
937 | spin_lock_bh(&ap_queues_lock); |
938 | if (is_queue_dev(dev)) | |
939 | hash_del(&to_ap_queue(dev)->hnode); | |
940 | spin_unlock_bh(&ap_queues_lock); | |
e3850508 | 941 | |
29c2680f | 942 | put_device(dev); |
1534c382 MS |
943 | } |
944 | ||
bc4b295e HF |
945 | struct ap_queue *ap_get_qdev(ap_qid_t qid) |
946 | { | |
947 | int bkt; | |
948 | struct ap_queue *aq; | |
949 | ||
950 | spin_lock_bh(&ap_queues_lock); | |
951 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
952 | if (aq->qid == qid) { | |
953 | get_device(&aq->ap_dev.device); | |
954 | spin_unlock_bh(&ap_queues_lock); | |
955 | return aq; | |
956 | } | |
957 | } | |
958 | spin_unlock_bh(&ap_queues_lock); | |
959 | ||
960 | return NULL; | |
961 | } | |
962 | EXPORT_SYMBOL(ap_get_qdev); | |
963 | ||
1534c382 MS |
964 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, |
965 | char *name) | |
966 | { | |
967 | struct device_driver *drv = &ap_drv->driver; | |
968 | ||
969 | drv->bus = &ap_bus_type; | |
1534c382 MS |
970 | drv->owner = owner; |
971 | drv->name = name; | |
972 | return driver_register(drv); | |
973 | } | |
974 | EXPORT_SYMBOL(ap_driver_register); | |
975 | ||
976 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
977 | { | |
978 | driver_unregister(&ap_drv->driver); | |
979 | } | |
980 | EXPORT_SYMBOL(ap_driver_unregister); | |
981 | ||
eacf5b36 HF |
982 | /* |
983 | * Enforce a synchronous AP bus rescan. | |
984 | * Returns true if the bus scan finds a change in the AP configuration | |
985 | * and AP devices have been added or deleted when this function returns. | |
986 | */ | |
987 | bool ap_bus_force_rescan(void) | |
dabecb29 | 988 | { |
eacf5b36 HF |
989 | unsigned long scan_counter = atomic64_read(&ap_scan_bus_count); |
990 | bool rc = false; | |
991 | ||
992 | pr_debug(">%s scan counter=%lu\n", __func__, scan_counter); | |
993 | ||
e14aec23 | 994 | /* Only trigger AP bus scans after the initial scan is done */ |
eacf5b36 HF |
995 | if (scan_counter <= 0) |
996 | goto out; | |
e14aec23 | 997 | |
eacf5b36 HF |
998 | /* Try to acquire the AP scan bus mutex */ |
999 | if (mutex_trylock(&ap_scan_bus_mutex)) { | |
1000 | /* mutex acquired, run the AP bus scan */ | |
1001 | ap_scan_bus_result = ap_scan_bus(); | |
1002 | rc = ap_scan_bus_result; | |
1003 | mutex_unlock(&ap_scan_bus_mutex); | |
1004 | goto out; | |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * Mutex acquire failed. So there is currently another task | |
1009 | * already running the AP bus scan. Then let's simple wait | |
1010 | * for the lock which means the other task has finished and | |
1011 | * stored the result in ap_scan_bus_result. | |
1012 | */ | |
1013 | if (mutex_lock_interruptible(&ap_scan_bus_mutex)) { | |
1014 | /* some error occurred, ignore and go out */ | |
1015 | goto out; | |
1016 | } | |
1017 | rc = ap_scan_bus_result; | |
1018 | mutex_unlock(&ap_scan_bus_mutex); | |
1019 | ||
1020 | out: | |
1021 | pr_debug("%s rc=%d\n", __func__, rc); | |
1022 | return rc; | |
dabecb29 HD |
1023 | } |
1024 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
1025 | ||
0d9c038f | 1026 | /* |
2004b57c HF |
1027 | * A config change has happened, force an ap bus rescan. |
1028 | */ | |
2a483d33 HD |
1029 | static int ap_bus_cfg_chg(struct notifier_block *nb, |
1030 | unsigned long action, void *data) | |
0d9c038f | 1031 | { |
2a483d33 HD |
1032 | if (action != CHSC_NOTIFY_AP_CFG) |
1033 | return NOTIFY_DONE; | |
1034 | ||
08b2c370 | 1035 | pr_debug("%s config change, forcing bus rescan\n", __func__); |
0d9c038f TK |
1036 | |
1037 | ap_bus_force_rescan(); | |
2a483d33 HD |
1038 | |
1039 | return NOTIFY_OK; | |
0d9c038f TK |
1040 | } |
1041 | ||
2a483d33 HD |
1042 | static struct notifier_block ap_bus_nb = { |
1043 | .notifier_call = ap_bus_cfg_chg, | |
1044 | }; | |
1045 | ||
6e697394 | 1046 | int ap_hex2bitmap(const char *str, unsigned long *bitmap, int bits) |
7e0bdbe5 HF |
1047 | { |
1048 | int i, n, b; | |
1049 | ||
1050 | /* bits needs to be a multiple of 8 */ | |
1051 | if (bits & 0x07) | |
1052 | return -EINVAL; | |
1053 | ||
7e0bdbe5 HF |
1054 | if (str[0] == '0' && str[1] == 'x') |
1055 | str++; | |
1056 | if (*str == 'x') | |
1057 | str++; | |
1058 | ||
1059 | for (i = 0; isxdigit(*str) && i < bits; str++) { | |
1060 | b = hex_to_bin(*str); | |
1061 | for (n = 0; n < 4; n++) | |
1062 | if (b & (0x08 >> n)) | |
1063 | set_bit_inv(i + n, bitmap); | |
1064 | i += 4; | |
1065 | } | |
1066 | ||
3d8f60d3 HF |
1067 | if (*str == '\n') |
1068 | str++; | |
1069 | if (*str) | |
1070 | return -EINVAL; | |
1071 | return 0; | |
1072 | } | |
6e697394 | 1073 | EXPORT_SYMBOL(ap_hex2bitmap); |
3d8f60d3 HF |
1074 | |
1075 | /* | |
fa108f95 MS |
1076 | * modify_bitmap() - parse bitmask argument and modify an existing |
1077 | * bit mask accordingly. A concatenation (done with ',') of these | |
1078 | * terms is recognized: | |
3d8f60d3 HF |
1079 | * +<bitnr>[-<bitnr>] or -<bitnr>[-<bitnr>] |
1080 | * <bitnr> may be any valid number (hex, decimal or octal) in the range | |
1081 | * 0...bits-1; the leading + or - is required. Here are some examples: | |
1082 | * +0-15,+32,-128,-0xFF | |
1083 | * -0-255,+1-16,+0x128 | |
1084 | * +1,+2,+3,+4,-5,-7-10 | |
fa108f95 MS |
1085 | * Returns the new bitmap after all changes have been applied. Every |
1086 | * positive value in the string will set a bit and every negative value | |
1087 | * in the string will clear a bit. As a bit may be touched more than once, | |
1088 | * the last 'operation' wins: | |
1089 | * +0-255,-128 = first bits 0-255 will be set, then bit 128 will be | |
1090 | * cleared again. All other bits are unmodified. | |
3d8f60d3 | 1091 | */ |
fa108f95 | 1092 | static int modify_bitmap(const char *str, unsigned long *bitmap, int bits) |
3d8f60d3 HF |
1093 | { |
1094 | int a, i, z; | |
1095 | char *np, sign; | |
1096 | ||
1097 | /* bits needs to be a multiple of 8 */ | |
1098 | if (bits & 0x07) | |
7e0bdbe5 HF |
1099 | return -EINVAL; |
1100 | ||
3d8f60d3 HF |
1101 | while (*str) { |
1102 | sign = *str++; | |
1103 | if (sign != '+' && sign != '-') | |
1104 | return -EINVAL; | |
1105 | a = z = simple_strtoul(str, &np, 0); | |
1106 | if (str == np || a >= bits) | |
1107 | return -EINVAL; | |
1108 | str = np; | |
1109 | if (*str == '-') { | |
1110 | z = simple_strtoul(++str, &np, 0); | |
1111 | if (str == np || a > z || z >= bits) | |
1112 | return -EINVAL; | |
1113 | str = np; | |
1114 | } | |
1115 | for (i = a; i <= z; i++) | |
fa108f95 MS |
1116 | if (sign == '+') |
1117 | set_bit_inv(i, bitmap); | |
1118 | else | |
1119 | clear_bit_inv(i, bitmap); | |
3d8f60d3 HF |
1120 | while (*str == ',' || *str == '\n') |
1121 | str++; | |
1122 | } | |
1123 | ||
7e0bdbe5 HF |
1124 | return 0; |
1125 | } | |
1126 | ||
4f8206b8 TK |
1127 | static int ap_parse_bitmap_str(const char *str, unsigned long *bitmap, int bits, |
1128 | unsigned long *newmap) | |
1129 | { | |
1130 | unsigned long size; | |
1131 | int rc; | |
1132 | ||
1133 | size = BITS_TO_LONGS(bits) * sizeof(unsigned long); | |
1134 | if (*str == '+' || *str == '-') { | |
1135 | memcpy(newmap, bitmap, size); | |
1136 | rc = modify_bitmap(str, newmap, bits); | |
1137 | } else { | |
1138 | memset(newmap, 0, size); | |
6e697394 | 1139 | rc = ap_hex2bitmap(str, newmap, bits); |
4f8206b8 TK |
1140 | } |
1141 | return rc; | |
1142 | } | |
1143 | ||
00fab235 HF |
1144 | int ap_parse_mask_str(const char *str, |
1145 | unsigned long *bitmap, int bits, | |
1146 | struct mutex *lock) | |
3d8f60d3 | 1147 | { |
fa108f95 MS |
1148 | unsigned long *newmap, size; |
1149 | int rc; | |
3d8f60d3 HF |
1150 | |
1151 | /* bits needs to be a multiple of 8 */ | |
1152 | if (bits & 0x07) | |
1153 | return -EINVAL; | |
1154 | ||
2004b57c | 1155 | size = BITS_TO_LONGS(bits) * sizeof(unsigned long); |
fa108f95 MS |
1156 | newmap = kmalloc(size, GFP_KERNEL); |
1157 | if (!newmap) | |
1158 | return -ENOMEM; | |
1159 | if (mutex_lock_interruptible(lock)) { | |
1160 | kfree(newmap); | |
1161 | return -ERESTARTSYS; | |
1162 | } | |
4f8206b8 | 1163 | rc = ap_parse_bitmap_str(str, bitmap, bits, newmap); |
fa108f95 MS |
1164 | if (rc == 0) |
1165 | memcpy(bitmap, newmap, size); | |
3d8f60d3 | 1166 | mutex_unlock(lock); |
fa108f95 MS |
1167 | kfree(newmap); |
1168 | return rc; | |
3d8f60d3 | 1169 | } |
00fab235 | 1170 | EXPORT_SYMBOL(ap_parse_mask_str); |
3d8f60d3 HF |
1171 | |
1172 | /* | |
1173 | * AP bus attributes. | |
1174 | */ | |
1175 | ||
75cff725 | 1176 | static ssize_t ap_domain_show(const struct bus_type *bus, char *buf) |
1534c382 | 1177 | { |
964d581d | 1178 | return sysfs_emit(buf, "%d\n", ap_domain_index); |
1534c382 MS |
1179 | } |
1180 | ||
75cff725 | 1181 | static ssize_t ap_domain_store(const struct bus_type *bus, |
fc1d3f02 IT |
1182 | const char *buf, size_t count) |
1183 | { | |
1184 | int domain; | |
1185 | ||
1186 | if (sscanf(buf, "%i\n", &domain) != 1 || | |
7e0bdbe5 HF |
1187 | domain < 0 || domain > ap_max_domain_id || |
1188 | !test_bit_inv(domain, ap_perms.aqm)) | |
fc1d3f02 | 1189 | return -EINVAL; |
c8337c47 | 1190 | |
fc1d3f02 IT |
1191 | spin_lock_bh(&ap_domain_lock); |
1192 | ap_domain_index = domain; | |
1193 | spin_unlock_bh(&ap_domain_lock); | |
cccd85bf | 1194 | |
3f74eb5f HF |
1195 | AP_DBF_INFO("%s stored new default domain=%d\n", |
1196 | __func__, domain); | |
cccd85bf | 1197 | |
fc1d3f02 IT |
1198 | return count; |
1199 | } | |
1200 | ||
ac2b96f3 | 1201 | static BUS_ATTR_RW(ap_domain); |
1534c382 | 1202 | |
75cff725 | 1203 | static ssize_t ap_control_domain_mask_show(const struct bus_type *bus, char *buf) |
91f3e3ea | 1204 | { |
8dec9cb9 | 1205 | if (!ap_qci_info->flags) /* QCI not supported */ |
964d581d | 1206 | return sysfs_emit(buf, "not supported\n"); |
40501c70 | 1207 | |
964d581d HF |
1208 | return sysfs_emit(buf, "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", |
1209 | ap_qci_info->adm[0], ap_qci_info->adm[1], | |
1210 | ap_qci_info->adm[2], ap_qci_info->adm[3], | |
1211 | ap_qci_info->adm[4], ap_qci_info->adm[5], | |
1212 | ap_qci_info->adm[6], ap_qci_info->adm[7]); | |
91f3e3ea IT |
1213 | } |
1214 | ||
ac2b96f3 | 1215 | static BUS_ATTR_RO(ap_control_domain_mask); |
91f3e3ea | 1216 | |
75cff725 | 1217 | static ssize_t ap_usage_domain_mask_show(const struct bus_type *bus, char *buf) |
e28d2af4 | 1218 | { |
8dec9cb9 | 1219 | if (!ap_qci_info->flags) /* QCI not supported */ |
964d581d | 1220 | return sysfs_emit(buf, "not supported\n"); |
40501c70 | 1221 | |
964d581d HF |
1222 | return sysfs_emit(buf, "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", |
1223 | ap_qci_info->aqm[0], ap_qci_info->aqm[1], | |
1224 | ap_qci_info->aqm[2], ap_qci_info->aqm[3], | |
1225 | ap_qci_info->aqm[4], ap_qci_info->aqm[5], | |
1226 | ap_qci_info->aqm[6], ap_qci_info->aqm[7]); | |
e28d2af4 IT |
1227 | } |
1228 | ||
ac2b96f3 | 1229 | static BUS_ATTR_RO(ap_usage_domain_mask); |
1534c382 | 1230 | |
75cff725 | 1231 | static ssize_t ap_adapter_mask_show(const struct bus_type *bus, char *buf) |
aa55bf5f | 1232 | { |
8dec9cb9 | 1233 | if (!ap_qci_info->flags) /* QCI not supported */ |
964d581d | 1234 | return sysfs_emit(buf, "not supported\n"); |
40501c70 | 1235 | |
964d581d HF |
1236 | return sysfs_emit(buf, "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", |
1237 | ap_qci_info->apm[0], ap_qci_info->apm[1], | |
1238 | ap_qci_info->apm[2], ap_qci_info->apm[3], | |
1239 | ap_qci_info->apm[4], ap_qci_info->apm[5], | |
1240 | ap_qci_info->apm[6], ap_qci_info->apm[7]); | |
aa55bf5f HF |
1241 | } |
1242 | ||
1243 | static BUS_ATTR_RO(ap_adapter_mask); | |
1244 | ||
75cff725 | 1245 | static ssize_t ap_interrupts_show(const struct bus_type *bus, char *buf) |
cb17a636 | 1246 | { |
964d581d | 1247 | return sysfs_emit(buf, "%d\n", ap_irq_flag ? 1 : 0); |
cb17a636 FB |
1248 | } |
1249 | ||
ac2b96f3 HF |
1250 | static BUS_ATTR_RO(ap_interrupts); |
1251 | ||
75cff725 | 1252 | static ssize_t config_time_show(const struct bus_type *bus, char *buf) |
ac2b96f3 | 1253 | { |
99b3126e | 1254 | return sysfs_emit(buf, "%d\n", ap_scan_bus_time); |
ac2b96f3 | 1255 | } |
cb17a636 | 1256 | |
75cff725 | 1257 | static ssize_t config_time_store(const struct bus_type *bus, |
ac2b96f3 | 1258 | const char *buf, size_t count) |
1534c382 MS |
1259 | { |
1260 | int time; | |
1261 | ||
1262 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1263 | return -EINVAL; | |
99b3126e HF |
1264 | ap_scan_bus_time = time; |
1265 | mod_timer(&ap_scan_bus_timer, jiffies + ap_scan_bus_time * HZ); | |
1534c382 MS |
1266 | return count; |
1267 | } | |
1268 | ||
ac2b96f3 | 1269 | static BUS_ATTR_RW(config_time); |
1534c382 | 1270 | |
75cff725 | 1271 | static ssize_t poll_thread_show(const struct bus_type *bus, char *buf) |
1534c382 | 1272 | { |
964d581d | 1273 | return sysfs_emit(buf, "%d\n", ap_poll_kthread ? 1 : 0); |
1534c382 MS |
1274 | } |
1275 | ||
75cff725 | 1276 | static ssize_t poll_thread_store(const struct bus_type *bus, |
ac2b96f3 | 1277 | const char *buf, size_t count) |
1534c382 | 1278 | { |
263c8454 HF |
1279 | bool value; |
1280 | int rc; | |
1534c382 | 1281 | |
263c8454 HF |
1282 | rc = kstrtobool(buf, &value); |
1283 | if (rc) | |
1284 | return rc; | |
1285 | ||
1286 | if (value) { | |
1534c382 MS |
1287 | rc = ap_poll_thread_start(); |
1288 | if (rc) | |
83e9d5d2 | 1289 | count = rc; |
2004b57c | 1290 | } else { |
1534c382 | 1291 | ap_poll_thread_stop(); |
2004b57c | 1292 | } |
1534c382 MS |
1293 | return count; |
1294 | } | |
1295 | ||
ac2b96f3 | 1296 | static BUS_ATTR_RW(poll_thread); |
1534c382 | 1297 | |
75cff725 | 1298 | static ssize_t poll_timeout_show(const struct bus_type *bus, char *buf) |
fe137230 | 1299 | { |
263c8454 | 1300 | return sysfs_emit(buf, "%lu\n", poll_high_timeout); |
fe137230 FB |
1301 | } |
1302 | ||
75cff725 | 1303 | static ssize_t poll_timeout_store(const struct bus_type *bus, const char *buf, |
fe137230 FB |
1304 | size_t count) |
1305 | { | |
263c8454 | 1306 | unsigned long value; |
fe137230 | 1307 | ktime_t hr_time; |
263c8454 HF |
1308 | int rc; |
1309 | ||
1310 | rc = kstrtoul(buf, 0, &value); | |
1311 | if (rc) | |
1312 | return rc; | |
fe137230 FB |
1313 | |
1314 | /* 120 seconds = maximum poll interval */ | |
263c8454 | 1315 | if (value > 120000000000UL) |
fe137230 | 1316 | return -EINVAL; |
263c8454 HF |
1317 | poll_high_timeout = value; |
1318 | hr_time = poll_high_timeout; | |
fe137230 | 1319 | |
8cc2af7c IT |
1320 | spin_lock_bh(&ap_poll_timer_lock); |
1321 | hrtimer_cancel(&ap_poll_timer); | |
1322 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1323 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
1324 | spin_unlock_bh(&ap_poll_timer_lock); | |
1325 | ||
fe137230 FB |
1326 | return count; |
1327 | } | |
1328 | ||
ac2b96f3 | 1329 | static BUS_ATTR_RW(poll_timeout); |
fe137230 | 1330 | |
75cff725 | 1331 | static ssize_t ap_max_domain_id_show(const struct bus_type *bus, char *buf) |
5bc334bf | 1332 | { |
964d581d | 1333 | return sysfs_emit(buf, "%d\n", ap_max_domain_id); |
5bc334bf IT |
1334 | } |
1335 | ||
ac2b96f3 | 1336 | static BUS_ATTR_RO(ap_max_domain_id); |
5bc334bf | 1337 | |
75cff725 | 1338 | static ssize_t ap_max_adapter_id_show(const struct bus_type *bus, char *buf) |
c8337c47 | 1339 | { |
964d581d | 1340 | return sysfs_emit(buf, "%d\n", ap_max_adapter_id); |
c8337c47 HF |
1341 | } |
1342 | ||
1343 | static BUS_ATTR_RO(ap_max_adapter_id); | |
1344 | ||
75cff725 | 1345 | static ssize_t apmask_show(const struct bus_type *bus, char *buf) |
7e0bdbe5 HF |
1346 | { |
1347 | int rc; | |
1348 | ||
1349 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1350 | return -ERESTARTSYS; | |
964d581d HF |
1351 | rc = sysfs_emit(buf, "0x%016lx%016lx%016lx%016lx\n", |
1352 | ap_perms.apm[0], ap_perms.apm[1], | |
1353 | ap_perms.apm[2], ap_perms.apm[3]); | |
7e0bdbe5 HF |
1354 | mutex_unlock(&ap_perms_mutex); |
1355 | ||
1356 | return rc; | |
1357 | } | |
1358 | ||
4f8206b8 TK |
1359 | static int __verify_card_reservations(struct device_driver *drv, void *data) |
1360 | { | |
1361 | int rc = 0; | |
1362 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1363 | unsigned long *newapm = (unsigned long *)data; | |
1364 | ||
1365 | /* | |
1366 | * increase the driver's module refcounter to be sure it is not | |
1367 | * going away when we invoke the callback function. | |
1368 | */ | |
1369 | if (!try_module_get(drv->owner)) | |
1370 | return 0; | |
1371 | ||
1372 | if (ap_drv->in_use) { | |
1373 | rc = ap_drv->in_use(newapm, ap_perms.aqm); | |
1374 | if (rc) | |
1375 | rc = -EBUSY; | |
1376 | } | |
1377 | ||
1378 | /* release the driver's module */ | |
1379 | module_put(drv->owner); | |
1380 | ||
1381 | return rc; | |
1382 | } | |
1383 | ||
1384 | static int apmask_commit(unsigned long *newapm) | |
1385 | { | |
1386 | int rc; | |
1387 | unsigned long reserved[BITS_TO_LONGS(AP_DEVICES)]; | |
1388 | ||
1389 | /* | |
1390 | * Check if any bits in the apmask have been set which will | |
1391 | * result in queues being removed from non-default drivers | |
1392 | */ | |
1393 | if (bitmap_andnot(reserved, newapm, ap_perms.apm, AP_DEVICES)) { | |
1394 | rc = bus_for_each_drv(&ap_bus_type, NULL, reserved, | |
1395 | __verify_card_reservations); | |
1396 | if (rc) | |
1397 | return rc; | |
1398 | } | |
1399 | ||
1400 | memcpy(ap_perms.apm, newapm, APMASKSIZE); | |
1401 | ||
1402 | return 0; | |
1403 | } | |
1404 | ||
75cff725 | 1405 | static ssize_t apmask_store(const struct bus_type *bus, const char *buf, |
7e0bdbe5 HF |
1406 | size_t count) |
1407 | { | |
d9b38e9d | 1408 | int rc, changes = 0; |
4f8206b8 TK |
1409 | DECLARE_BITMAP(newapm, AP_DEVICES); |
1410 | ||
1411 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1412 | return -ERESTARTSYS; | |
7e0bdbe5 | 1413 | |
4f8206b8 TK |
1414 | rc = ap_parse_bitmap_str(buf, ap_perms.apm, AP_DEVICES, newapm); |
1415 | if (rc) | |
1416 | goto done; | |
1417 | ||
d9b38e9d HF |
1418 | changes = memcmp(ap_perms.apm, newapm, APMASKSIZE); |
1419 | if (changes) | |
1420 | rc = apmask_commit(newapm); | |
4f8206b8 TK |
1421 | |
1422 | done: | |
1423 | mutex_unlock(&ap_perms_mutex); | |
3d8f60d3 HF |
1424 | if (rc) |
1425 | return rc; | |
7e0bdbe5 | 1426 | |
d9b38e9d HF |
1427 | if (changes) { |
1428 | ap_bus_revise_bindings(); | |
1429 | ap_send_mask_changed_uevent(newapm, NULL); | |
1430 | } | |
7e0bdbe5 HF |
1431 | |
1432 | return count; | |
1433 | } | |
1434 | ||
1435 | static BUS_ATTR_RW(apmask); | |
1436 | ||
75cff725 | 1437 | static ssize_t aqmask_show(const struct bus_type *bus, char *buf) |
7e0bdbe5 HF |
1438 | { |
1439 | int rc; | |
1440 | ||
1441 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1442 | return -ERESTARTSYS; | |
964d581d HF |
1443 | rc = sysfs_emit(buf, "0x%016lx%016lx%016lx%016lx\n", |
1444 | ap_perms.aqm[0], ap_perms.aqm[1], | |
1445 | ap_perms.aqm[2], ap_perms.aqm[3]); | |
7e0bdbe5 HF |
1446 | mutex_unlock(&ap_perms_mutex); |
1447 | ||
1448 | return rc; | |
1449 | } | |
1450 | ||
4f8206b8 TK |
1451 | static int __verify_queue_reservations(struct device_driver *drv, void *data) |
1452 | { | |
1453 | int rc = 0; | |
1454 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1455 | unsigned long *newaqm = (unsigned long *)data; | |
1456 | ||
1457 | /* | |
1458 | * increase the driver's module refcounter to be sure it is not | |
1459 | * going away when we invoke the callback function. | |
1460 | */ | |
1461 | if (!try_module_get(drv->owner)) | |
1462 | return 0; | |
1463 | ||
1464 | if (ap_drv->in_use) { | |
1465 | rc = ap_drv->in_use(ap_perms.apm, newaqm); | |
1466 | if (rc) | |
2f23256c | 1467 | rc = -EBUSY; |
4f8206b8 TK |
1468 | } |
1469 | ||
1470 | /* release the driver's module */ | |
1471 | module_put(drv->owner); | |
1472 | ||
1473 | return rc; | |
1474 | } | |
1475 | ||
1476 | static int aqmask_commit(unsigned long *newaqm) | |
1477 | { | |
1478 | int rc; | |
1479 | unsigned long reserved[BITS_TO_LONGS(AP_DOMAINS)]; | |
1480 | ||
1481 | /* | |
1482 | * Check if any bits in the aqmask have been set which will | |
1483 | * result in queues being removed from non-default drivers | |
1484 | */ | |
1485 | if (bitmap_andnot(reserved, newaqm, ap_perms.aqm, AP_DOMAINS)) { | |
1486 | rc = bus_for_each_drv(&ap_bus_type, NULL, reserved, | |
1487 | __verify_queue_reservations); | |
1488 | if (rc) | |
1489 | return rc; | |
1490 | } | |
1491 | ||
1492 | memcpy(ap_perms.aqm, newaqm, AQMASKSIZE); | |
1493 | ||
1494 | return 0; | |
1495 | } | |
1496 | ||
75cff725 | 1497 | static ssize_t aqmask_store(const struct bus_type *bus, const char *buf, |
7e0bdbe5 HF |
1498 | size_t count) |
1499 | { | |
d9b38e9d | 1500 | int rc, changes = 0; |
4f8206b8 | 1501 | DECLARE_BITMAP(newaqm, AP_DOMAINS); |
7e0bdbe5 | 1502 | |
4f8206b8 TK |
1503 | if (mutex_lock_interruptible(&ap_perms_mutex)) |
1504 | return -ERESTARTSYS; | |
1505 | ||
1506 | rc = ap_parse_bitmap_str(buf, ap_perms.aqm, AP_DOMAINS, newaqm); | |
1507 | if (rc) | |
1508 | goto done; | |
1509 | ||
d9b38e9d HF |
1510 | changes = memcmp(ap_perms.aqm, newaqm, APMASKSIZE); |
1511 | if (changes) | |
1512 | rc = aqmask_commit(newaqm); | |
4f8206b8 TK |
1513 | |
1514 | done: | |
1515 | mutex_unlock(&ap_perms_mutex); | |
3d8f60d3 HF |
1516 | if (rc) |
1517 | return rc; | |
7e0bdbe5 | 1518 | |
d9b38e9d HF |
1519 | if (changes) { |
1520 | ap_bus_revise_bindings(); | |
1521 | ap_send_mask_changed_uevent(NULL, newaqm); | |
1522 | } | |
7e0bdbe5 HF |
1523 | |
1524 | return count; | |
1525 | } | |
1526 | ||
1527 | static BUS_ATTR_RW(aqmask); | |
1528 | ||
75cff725 | 1529 | static ssize_t scans_show(const struct bus_type *bus, char *buf) |
837cd105 | 1530 | { |
964d581d | 1531 | return sysfs_emit(buf, "%llu\n", atomic64_read(&ap_scan_bus_count)); |
837cd105 HF |
1532 | } |
1533 | ||
75cff725 | 1534 | static ssize_t scans_store(const struct bus_type *bus, const char *buf, |
8944d05f HF |
1535 | size_t count) |
1536 | { | |
1537 | AP_DBF_INFO("%s force AP bus rescan\n", __func__); | |
1538 | ||
1539 | ap_bus_force_rescan(); | |
1540 | ||
1541 | return count; | |
1542 | } | |
1543 | ||
1544 | static BUS_ATTR_RW(scans); | |
837cd105 | 1545 | |
75cff725 | 1546 | static ssize_t bindings_show(const struct bus_type *bus, char *buf) |
837cd105 HF |
1547 | { |
1548 | int rc; | |
1549 | unsigned int apqns, n; | |
1550 | ||
1551 | ap_calc_bound_apqns(&apqns, &n); | |
1552 | if (atomic64_read(&ap_scan_bus_count) >= 1 && n == apqns) | |
964d581d | 1553 | rc = sysfs_emit(buf, "%u/%u (complete)\n", n, apqns); |
837cd105 | 1554 | else |
964d581d | 1555 | rc = sysfs_emit(buf, "%u/%u\n", n, apqns); |
837cd105 HF |
1556 | |
1557 | return rc; | |
1558 | } | |
1559 | ||
1560 | static BUS_ATTR_RO(bindings); | |
1561 | ||
10de638d | 1562 | static ssize_t features_show(const struct bus_type *bus, char *buf) |
d7b1813a HF |
1563 | { |
1564 | int n = 0; | |
1565 | ||
8dec9cb9 | 1566 | if (!ap_qci_info->flags) /* QCI not supported */ |
d7b1813a HF |
1567 | return sysfs_emit(buf, "-\n"); |
1568 | ||
1569 | if (ap_qci_info->apsc) | |
1570 | n += sysfs_emit_at(buf, n, "APSC "); | |
1571 | if (ap_qci_info->apxa) | |
1572 | n += sysfs_emit_at(buf, n, "APXA "); | |
1573 | if (ap_qci_info->qact) | |
1574 | n += sysfs_emit_at(buf, n, "QACT "); | |
1575 | if (ap_qci_info->rc8a) | |
1576 | n += sysfs_emit_at(buf, n, "RC8A "); | |
1577 | if (ap_qci_info->apsb) | |
1578 | n += sysfs_emit_at(buf, n, "APSB "); | |
1579 | ||
1580 | sysfs_emit_at(buf, n == 0 ? 0 : n - 1, "\n"); | |
1581 | ||
1582 | return n; | |
1583 | } | |
1584 | ||
1585 | static BUS_ATTR_RO(features); | |
1586 | ||
8cb4c20f JW |
1587 | static struct attribute *ap_bus_attrs[] = { |
1588 | &bus_attr_ap_domain.attr, | |
1589 | &bus_attr_ap_control_domain_mask.attr, | |
1590 | &bus_attr_ap_usage_domain_mask.attr, | |
1591 | &bus_attr_ap_adapter_mask.attr, | |
1592 | &bus_attr_config_time.attr, | |
1593 | &bus_attr_poll_thread.attr, | |
1594 | &bus_attr_ap_interrupts.attr, | |
1595 | &bus_attr_poll_timeout.attr, | |
1596 | &bus_attr_ap_max_domain_id.attr, | |
1597 | &bus_attr_ap_max_adapter_id.attr, | |
1598 | &bus_attr_apmask.attr, | |
1599 | &bus_attr_aqmask.attr, | |
1600 | &bus_attr_scans.attr, | |
1601 | &bus_attr_bindings.attr, | |
d7b1813a | 1602 | &bus_attr_features.attr, |
fe137230 | 1603 | NULL, |
1534c382 | 1604 | }; |
8cb4c20f JW |
1605 | ATTRIBUTE_GROUPS(ap_bus); |
1606 | ||
5b431787 | 1607 | static const struct bus_type ap_bus_type = { |
8cb4c20f JW |
1608 | .name = "ap", |
1609 | .bus_groups = ap_bus_groups, | |
1610 | .match = &ap_bus_match, | |
1611 | .uevent = &ap_uevent, | |
95c09f03 JW |
1612 | .probe = ap_device_probe, |
1613 | .remove = ap_device_remove, | |
8cb4c20f | 1614 | }; |
1534c382 MS |
1615 | |
1616 | /** | |
1c472d46 HP |
1617 | * ap_select_domain(): Select an AP domain if possible and we haven't |
1618 | * already done so before. | |
1534c382 | 1619 | */ |
1c472d46 | 1620 | static void ap_select_domain(void) |
1534c382 | 1621 | { |
6acbe21f | 1622 | struct ap_queue_status status; |
c8337c47 | 1623 | int card, dom; |
1534c382 | 1624 | |
1749a81d | 1625 | /* |
c8337c47 HF |
1626 | * Choose the default domain. Either the one specified with |
1627 | * the "domain=" parameter or the first domain with at least | |
1628 | * one valid APQN. | |
1534c382 | 1629 | */ |
fc1d3f02 IT |
1630 | spin_lock_bh(&ap_domain_lock); |
1631 | if (ap_domain_index >= 0) { | |
1534c382 | 1632 | /* Domain has already been selected. */ |
c8337c47 | 1633 | goto out; |
fc1d3f02 | 1634 | } |
c8337c47 HF |
1635 | for (dom = 0; dom <= ap_max_domain_id; dom++) { |
1636 | if (!ap_test_config_usage_domain(dom) || | |
1637 | !test_bit_inv(dom, ap_perms.aqm)) | |
75014550 | 1638 | continue; |
c8337c47 HF |
1639 | for (card = 0; card <= ap_max_adapter_id; card++) { |
1640 | if (!ap_test_config_card_id(card) || | |
1641 | !test_bit_inv(card, ap_perms.apm)) | |
75014550 | 1642 | continue; |
c8337c47 | 1643 | status = ap_test_queue(AP_MKQID(card, dom), |
e7fc5146 TK |
1644 | ap_apft_available(), |
1645 | NULL); | |
c8337c47 HF |
1646 | if (status.response_code == AP_RESPONSE_NORMAL) |
1647 | break; | |
1534c382 | 1648 | } |
c8337c47 HF |
1649 | if (card <= ap_max_adapter_id) |
1650 | break; | |
1534c382 | 1651 | } |
c8337c47 HF |
1652 | if (dom <= ap_max_domain_id) { |
1653 | ap_domain_index = dom; | |
2ea2a609 HF |
1654 | AP_DBF_INFO("%s new default domain is %d\n", |
1655 | __func__, ap_domain_index); | |
1534c382 | 1656 | } |
c8337c47 | 1657 | out: |
fc1d3f02 | 1658 | spin_unlock_bh(&ap_domain_lock); |
1534c382 MS |
1659 | } |
1660 | ||
9a564108 HF |
1661 | /* |
1662 | * This function checks the type and returns either 0 for not | |
1663 | * supported or the highest compatible type value (which may | |
1664 | * include the input type value). | |
1665 | */ | |
1666 | static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func) | |
1667 | { | |
1668 | int comp_type = 0; | |
1669 | ||
5ac8c724 HF |
1670 | /* < CEX4 is not supported */ |
1671 | if (rawtype < AP_DEVICE_TYPE_CEX4) { | |
3f74eb5f HF |
1672 | AP_DBF_WARN("%s queue=%02x.%04x unsupported type %d\n", |
1673 | __func__, AP_QID_CARD(qid), | |
1674 | AP_QID_QUEUE(qid), rawtype); | |
9a564108 | 1675 | return 0; |
2ea2a609 | 1676 | } |
985214af HF |
1677 | /* up to CEX8 known and fully supported */ |
1678 | if (rawtype <= AP_DEVICE_TYPE_CEX8) | |
9a564108 HF |
1679 | return rawtype; |
1680 | /* | |
985214af | 1681 | * unknown new type > CEX8, check for compatibility |
9a564108 | 1682 | * to the highest known and supported type which is |
985214af | 1683 | * currently CEX8 with the help of the QACT function. |
9a564108 HF |
1684 | */ |
1685 | if (ap_qact_available()) { | |
1686 | struct ap_queue_status status; | |
56c5c683 | 1687 | union ap_qact_ap_info apinfo = {0}; |
9a564108 HF |
1688 | |
1689 | apinfo.mode = (func >> 26) & 0x07; | |
985214af | 1690 | apinfo.cat = AP_DEVICE_TYPE_CEX8; |
9a564108 | 1691 | status = ap_qact(qid, 0, &apinfo); |
2004b57c | 1692 | if (status.response_code == AP_RESPONSE_NORMAL && |
5ac8c724 | 1693 | apinfo.cat >= AP_DEVICE_TYPE_CEX4 && |
2004b57c | 1694 | apinfo.cat <= AP_DEVICE_TYPE_CEX8) |
9a564108 HF |
1695 | comp_type = apinfo.cat; |
1696 | } | |
1697 | if (!comp_type) | |
3f74eb5f HF |
1698 | AP_DBF_WARN("%s queue=%02x.%04x unable to map type %d\n", |
1699 | __func__, AP_QID_CARD(qid), | |
1700 | AP_QID_QUEUE(qid), rawtype); | |
9a564108 | 1701 | else if (comp_type != rawtype) |
3f74eb5f HF |
1702 | AP_DBF_INFO("%s queue=%02x.%04x map type %d to %d\n", |
1703 | __func__, AP_QID_CARD(qid), AP_QID_QUEUE(qid), | |
2ea2a609 | 1704 | rawtype, comp_type); |
9a564108 HF |
1705 | return comp_type; |
1706 | } | |
1707 | ||
e28d2af4 | 1708 | /* |
a7b1868a | 1709 | * Helper function to be used with bus_find_dev |
e28d2af4 | 1710 | * matches for the card device with the given id |
1534c382 | 1711 | */ |
418e3ea1 | 1712 | static int __match_card_device_with_id(struct device *dev, const void *data) |
1534c382 | 1713 | { |
2004b57c | 1714 | return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long)(void *)data; |
1534c382 MS |
1715 | } |
1716 | ||
a7b1868a HF |
1717 | /* |
1718 | * Helper function to be used with bus_find_dev | |
e28d2af4 IT |
1719 | * matches for the queue device with a given qid |
1720 | */ | |
418e3ea1 | 1721 | static int __match_queue_device_with_qid(struct device *dev, const void *data) |
e28d2af4 | 1722 | { |
2004b57c | 1723 | return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long)data; |
e28d2af4 IT |
1724 | } |
1725 | ||
b1af7528 HF |
1726 | /* |
1727 | * Helper function to be used with bus_find_dev | |
1728 | * matches any queue device with given queue id | |
1729 | */ | |
418e3ea1 | 1730 | static int __match_queue_device_with_queue_id(struct device *dev, const void *data) |
b1af7528 | 1731 | { |
2004b57c HF |
1732 | return is_queue_dev(dev) && |
1733 | AP_QID_QUEUE(to_ap_queue(dev)->qid) == (int)(long)data; | |
b1af7528 HF |
1734 | } |
1735 | ||
28391585 TK |
1736 | /* Helper function for notify_config_changed */ |
1737 | static int __drv_notify_config_changed(struct device_driver *drv, void *data) | |
1738 | { | |
1739 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1740 | ||
1741 | if (try_module_get(drv->owner)) { | |
1742 | if (ap_drv->on_config_changed) | |
1743 | ap_drv->on_config_changed(ap_qci_info, ap_qci_info_old); | |
1744 | module_put(drv->owner); | |
1745 | } | |
1746 | ||
1747 | return 0; | |
1748 | } | |
1749 | ||
1750 | /* Notify all drivers about an qci config change */ | |
1751 | static inline void notify_config_changed(void) | |
1752 | { | |
1753 | bus_for_each_drv(&ap_bus_type, NULL, NULL, | |
1754 | __drv_notify_config_changed); | |
1755 | } | |
1756 | ||
1757 | /* Helper function for notify_scan_complete */ | |
1758 | static int __drv_notify_scan_complete(struct device_driver *drv, void *data) | |
1759 | { | |
1760 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1761 | ||
1762 | if (try_module_get(drv->owner)) { | |
1763 | if (ap_drv->on_scan_complete) | |
1764 | ap_drv->on_scan_complete(ap_qci_info, | |
1765 | ap_qci_info_old); | |
1766 | module_put(drv->owner); | |
1767 | } | |
1768 | ||
1769 | return 0; | |
1770 | } | |
1771 | ||
1772 | /* Notify all drivers about bus scan complete */ | |
1773 | static inline void notify_scan_complete(void) | |
1774 | { | |
1775 | bus_for_each_drv(&ap_bus_type, NULL, NULL, | |
1776 | __drv_notify_scan_complete); | |
1777 | } | |
1778 | ||
a7b1868a HF |
1779 | /* |
1780 | * Helper function for ap_scan_bus(). | |
4f2fcccd HF |
1781 | * Remove card device and associated queue devices. |
1782 | */ | |
1783 | static inline void ap_scan_rm_card_dev_and_queue_devs(struct ap_card *ac) | |
1784 | { | |
1785 | bus_for_each_dev(&ap_bus_type, NULL, | |
2004b57c | 1786 | (void *)(long)ac->id, |
4f2fcccd HF |
1787 | __ap_queue_devices_with_id_unregister); |
1788 | device_unregister(&ac->ap_dev.device); | |
1789 | } | |
1790 | ||
1791 | /* | |
1792 | * Helper function for ap_scan_bus(). | |
1793 | * Does the scan bus job for all the domains within | |
1794 | * a valid adapter given by an ap_card ptr. | |
e28d2af4 | 1795 | */ |
4f2fcccd | 1796 | static inline void ap_scan_domains(struct ap_card *ac) |
1534c382 | 1797 | { |
d4c53ae8 | 1798 | struct ap_tapq_hwinfo hwinfo; |
a7e701db | 1799 | bool decfg, chkstop; |
a7b1868a | 1800 | struct ap_queue *aq; |
038c5bed | 1801 | struct device *dev; |
038c5bed | 1802 | ap_qid_t qid; |
d4c53ae8 | 1803 | int rc, dom; |
4f2fcccd HF |
1804 | |
1805 | /* | |
1806 | * Go through the configuration for the domains and compare them | |
1807 | * to the existing queue devices. Also take care of the config | |
1808 | * and error state for the queue devices. | |
1809 | */ | |
1810 | ||
1811 | for (dom = 0; dom <= ap_max_domain_id; dom++) { | |
1812 | qid = AP_MKQID(ac->id, dom); | |
1813 | dev = bus_find_device(&ap_bus_type, NULL, | |
2004b57c | 1814 | (void *)(long)qid, |
4f2fcccd HF |
1815 | __match_queue_device_with_qid); |
1816 | aq = dev ? to_ap_queue(dev) : NULL; | |
1817 | if (!ap_test_config_usage_domain(dom)) { | |
1818 | if (dev) { | |
3f74eb5f | 1819 | AP_DBF_INFO("%s(%d,%d) not in config anymore, rm queue dev\n", |
4f2fcccd HF |
1820 | __func__, ac->id, dom); |
1821 | device_unregister(dev); | |
4f2fcccd | 1822 | } |
038c5bed | 1823 | goto put_dev_and_continue; |
4f2fcccd HF |
1824 | } |
1825 | /* domain is valid, get info from this APQN */ | |
d4c53ae8 | 1826 | rc = ap_queue_info(qid, &hwinfo, &decfg, &chkstop); |
038c5bed HF |
1827 | switch (rc) { |
1828 | case -1: | |
1829 | if (dev) { | |
3f74eb5f HF |
1830 | AP_DBF_INFO("%s(%d,%d) queue_info() failed, rm queue dev\n", |
1831 | __func__, ac->id, dom); | |
4f2fcccd | 1832 | device_unregister(dev); |
4f2fcccd | 1833 | } |
038c5bed HF |
1834 | fallthrough; |
1835 | case 0: | |
1836 | goto put_dev_and_continue; | |
1837 | default: | |
1838 | break; | |
4f2fcccd HF |
1839 | } |
1840 | /* if no queue device exists, create a new one */ | |
1841 | if (!aq) { | |
1842 | aq = ap_queue_create(qid, ac->ap_dev.device_type); | |
1843 | if (!aq) { | |
1844 | AP_DBF_WARN("%s(%d,%d) ap_queue_create() failed\n", | |
1845 | __func__, ac->id, dom); | |
1846 | continue; | |
1847 | } | |
1848 | aq->card = ac; | |
1849 | aq->config = !decfg; | |
a7e701db | 1850 | aq->chkstop = chkstop; |
207022d3 | 1851 | aq->se_bstate = hwinfo.bs; |
4f2fcccd HF |
1852 | dev = &aq->ap_dev.device; |
1853 | dev->bus = &ap_bus_type; | |
1854 | dev->parent = &ac->ap_dev.device; | |
1855 | dev_set_name(dev, "%02x.%04x", ac->id, dom); | |
1856 | /* register queue device */ | |
1857 | rc = device_register(dev); | |
1858 | if (rc) { | |
1859 | AP_DBF_WARN("%s(%d,%d) device_register() failed\n", | |
1860 | __func__, ac->id, dom); | |
1861 | goto put_dev_and_continue; | |
1862 | } | |
29c2680f HF |
1863 | /* get it and thus adjust reference counter */ |
1864 | get_device(dev); | |
32d1d920 | 1865 | if (decfg) { |
3f74eb5f | 1866 | AP_DBF_INFO("%s(%d,%d) new (decfg) queue dev created\n", |
4f2fcccd | 1867 | __func__, ac->id, dom); |
32d1d920 | 1868 | } else if (chkstop) { |
a7e701db HF |
1869 | AP_DBF_INFO("%s(%d,%d) new (chkstop) queue dev created\n", |
1870 | __func__, ac->id, dom); | |
32d1d920 HF |
1871 | } else { |
1872 | /* nudge the queue's state machine */ | |
1873 | ap_queue_init_state(aq); | |
3f74eb5f | 1874 | AP_DBF_INFO("%s(%d,%d) new queue dev created\n", |
4f2fcccd | 1875 | __func__, ac->id, dom); |
32d1d920 | 1876 | } |
4f2fcccd HF |
1877 | goto put_dev_and_continue; |
1878 | } | |
a7e701db | 1879 | /* handle state changes on already existing queue device */ |
4f2fcccd | 1880 | spin_lock_bh(&aq->lock); |
207022d3 HF |
1881 | /* SE bind state */ |
1882 | aq->se_bstate = hwinfo.bs; | |
a7e701db HF |
1883 | /* checkstop state */ |
1884 | if (chkstop && !aq->chkstop) { | |
1885 | /* checkstop on */ | |
1886 | aq->chkstop = true; | |
1887 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1888 | aq->dev_state = AP_DEV_STATE_ERROR; | |
1889 | aq->last_err_rc = AP_RESPONSE_CHECKSTOPPED; | |
1890 | } | |
1891 | spin_unlock_bh(&aq->lock); | |
08b2c370 HF |
1892 | pr_debug("%s(%d,%d) queue dev checkstop on\n", |
1893 | __func__, ac->id, dom); | |
a7e701db HF |
1894 | /* 'receive' pending messages with -EAGAIN */ |
1895 | ap_flush_queue(aq); | |
1896 | goto put_dev_and_continue; | |
1897 | } else if (!chkstop && aq->chkstop) { | |
1898 | /* checkstop off */ | |
1899 | aq->chkstop = false; | |
32d1d920 HF |
1900 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) |
1901 | _ap_queue_init_state(aq); | |
a7e701db | 1902 | spin_unlock_bh(&aq->lock); |
08b2c370 HF |
1903 | pr_debug("%s(%d,%d) queue dev checkstop off\n", |
1904 | __func__, ac->id, dom); | |
a7e701db HF |
1905 | goto put_dev_and_continue; |
1906 | } | |
1907 | /* config state change */ | |
4f2fcccd HF |
1908 | if (decfg && aq->config) { |
1909 | /* config off this queue device */ | |
1910 | aq->config = false; | |
1911 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1912 | aq->dev_state = AP_DEV_STATE_ERROR; | |
1913 | aq->last_err_rc = AP_RESPONSE_DECONFIGURED; | |
1914 | } | |
1915 | spin_unlock_bh(&aq->lock); | |
08b2c370 HF |
1916 | pr_debug("%s(%d,%d) queue dev config off\n", |
1917 | __func__, ac->id, dom); | |
df6f508c | 1918 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
4f2fcccd HF |
1919 | /* 'receive' pending messages with -EAGAIN */ |
1920 | ap_flush_queue(aq); | |
1921 | goto put_dev_and_continue; | |
a7e701db | 1922 | } else if (!decfg && !aq->config) { |
4f2fcccd HF |
1923 | /* config on this queue device */ |
1924 | aq->config = true; | |
32d1d920 HF |
1925 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) |
1926 | _ap_queue_init_state(aq); | |
4f2fcccd | 1927 | spin_unlock_bh(&aq->lock); |
08b2c370 HF |
1928 | pr_debug("%s(%d,%d) queue dev config on\n", |
1929 | __func__, ac->id, dom); | |
df6f508c | 1930 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
4f2fcccd HF |
1931 | goto put_dev_and_continue; |
1932 | } | |
1933 | /* handle other error states */ | |
1934 | if (!decfg && aq->dev_state == AP_DEV_STATE_ERROR) { | |
1935 | spin_unlock_bh(&aq->lock); | |
1936 | /* 'receive' pending messages with -EAGAIN */ | |
1937 | ap_flush_queue(aq); | |
1938 | /* re-init (with reset) the queue device */ | |
1939 | ap_queue_init_state(aq); | |
3f74eb5f | 1940 | AP_DBF_INFO("%s(%d,%d) queue dev reinit enforced\n", |
4f2fcccd HF |
1941 | __func__, ac->id, dom); |
1942 | goto put_dev_and_continue; | |
1943 | } | |
1944 | spin_unlock_bh(&aq->lock); | |
1945 | put_dev_and_continue: | |
1946 | put_device(dev); | |
1947 | } | |
1948 | } | |
1949 | ||
1950 | /* | |
1951 | * Helper function for ap_scan_bus(). | |
1952 | * Does the scan bus job for the given adapter id. | |
1953 | */ | |
1954 | static inline void ap_scan_adapter(int ap) | |
1955 | { | |
d4c53ae8 HF |
1956 | struct ap_tapq_hwinfo hwinfo; |
1957 | int rc, dom, comp_type; | |
a7e701db | 1958 | bool decfg, chkstop; |
4f2fcccd | 1959 | struct ap_card *ac; |
038c5bed | 1960 | struct device *dev; |
038c5bed | 1961 | ap_qid_t qid; |
a7b1868a | 1962 | |
4f2fcccd | 1963 | /* Is there currently a card device for this adapter ? */ |
a7b1868a | 1964 | dev = bus_find_device(&ap_bus_type, NULL, |
2004b57c | 1965 | (void *)(long)ap, |
a7b1868a HF |
1966 | __match_card_device_with_id); |
1967 | ac = dev ? to_ap_card(dev) : NULL; | |
4f2fcccd HF |
1968 | |
1969 | /* Adapter not in configuration ? */ | |
1970 | if (!ap_test_config_card_id(ap)) { | |
1971 | if (ac) { | |
3f74eb5f | 1972 | AP_DBF_INFO("%s(%d) ap not in config any more, rm card and queue devs\n", |
4f2fcccd HF |
1973 | __func__, ap); |
1974 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
a7b1868a HF |
1975 | put_device(dev); |
1976 | } | |
1977 | return; | |
1978 | } | |
cccd85bf | 1979 | |
a7b1868a | 1980 | /* |
4f2fcccd HF |
1981 | * Adapter ap is valid in the current configuration. So do some checks: |
1982 | * If no card device exists, build one. If a card device exists, check | |
1983 | * for type and functions changed. For all this we need to find a valid | |
1984 | * APQN first. | |
a7b1868a | 1985 | */ |
4f2fcccd HF |
1986 | |
1987 | for (dom = 0; dom <= ap_max_domain_id; dom++) | |
1988 | if (ap_test_config_usage_domain(dom)) { | |
1989 | qid = AP_MKQID(ap, dom); | |
d4c53ae8 | 1990 | if (ap_queue_info(qid, &hwinfo, &decfg, &chkstop) > 0) |
a7b1868a HF |
1991 | break; |
1992 | } | |
4f2fcccd | 1993 | if (dom > ap_max_domain_id) { |
038c5bed | 1994 | /* Could not find one valid APQN for this adapter */ |
4f2fcccd | 1995 | if (ac) { |
3f74eb5f HF |
1996 | AP_DBF_INFO("%s(%d) no type info (no APQN found), rm card and queue devs\n", |
1997 | __func__, ap); | |
4f2fcccd HF |
1998 | ap_scan_rm_card_dev_and_queue_devs(ac); |
1999 | put_device(dev); | |
2000 | } else { | |
08b2c370 HF |
2001 | pr_debug("%s(%d) no type info (no APQN found), ignored\n", |
2002 | __func__, ap); | |
a7b1868a | 2003 | } |
4f2fcccd HF |
2004 | return; |
2005 | } | |
d4c53ae8 | 2006 | if (!hwinfo.at) { |
4f2fcccd HF |
2007 | /* No apdater type info available, an unusable adapter */ |
2008 | if (ac) { | |
3f74eb5f | 2009 | AP_DBF_INFO("%s(%d) no valid type (0) info, rm card and queue devs\n", |
4f2fcccd HF |
2010 | __func__, ap); |
2011 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
a7b1868a | 2012 | put_device(dev); |
4f2fcccd | 2013 | } else { |
08b2c370 HF |
2014 | pr_debug("%s(%d) no valid type (0) info, ignored\n", |
2015 | __func__, ap); | |
a7b1868a | 2016 | } |
4f2fcccd | 2017 | return; |
a7b1868a | 2018 | } |
d4c53ae8 | 2019 | hwinfo.value &= TAPQ_CARD_HWINFO_MASK; /* filter card specific hwinfo */ |
4f2fcccd HF |
2020 | if (ac) { |
2021 | /* Check APQN against existing card device for changes */ | |
d4c53ae8 | 2022 | if (ac->hwinfo.at != hwinfo.at) { |
3f74eb5f | 2023 | AP_DBF_INFO("%s(%d) hwtype %d changed, rm card and queue devs\n", |
d4c53ae8 | 2024 | __func__, ap, hwinfo.at); |
4f2fcccd HF |
2025 | ap_scan_rm_card_dev_and_queue_devs(ac); |
2026 | put_device(dev); | |
2027 | ac = NULL; | |
d4c53ae8 | 2028 | } else if (ac->hwinfo.fac != hwinfo.fac) { |
3f74eb5f | 2029 | AP_DBF_INFO("%s(%d) functions 0x%08x changed, rm card and queue devs\n", |
d4c53ae8 | 2030 | __func__, ap, hwinfo.fac); |
4f2fcccd HF |
2031 | ap_scan_rm_card_dev_and_queue_devs(ac); |
2032 | put_device(dev); | |
2033 | ac = NULL; | |
2034 | } else { | |
a7e701db HF |
2035 | /* handle checkstop state change */ |
2036 | if (chkstop && !ac->chkstop) { | |
2037 | /* checkstop on */ | |
2038 | ac->chkstop = true; | |
2039 | AP_DBF_INFO("%s(%d) card dev checkstop on\n", | |
2040 | __func__, ap); | |
2041 | } else if (!chkstop && ac->chkstop) { | |
2042 | /* checkstop off */ | |
2043 | ac->chkstop = false; | |
2044 | AP_DBF_INFO("%s(%d) card dev checkstop off\n", | |
2045 | __func__, ap); | |
2046 | } | |
2047 | /* handle config state change */ | |
4f2fcccd HF |
2048 | if (decfg && ac->config) { |
2049 | ac->config = false; | |
3f74eb5f | 2050 | AP_DBF_INFO("%s(%d) card dev config off\n", |
4f2fcccd | 2051 | __func__, ap); |
df6f508c | 2052 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
a7e701db | 2053 | } else if (!decfg && !ac->config) { |
4f2fcccd | 2054 | ac->config = true; |
3f74eb5f | 2055 | AP_DBF_INFO("%s(%d) card dev config on\n", |
4f2fcccd | 2056 | __func__, ap); |
df6f508c | 2057 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
b1af7528 | 2058 | } |
a7b1868a | 2059 | } |
4f2fcccd HF |
2060 | } |
2061 | ||
2062 | if (!ac) { | |
2063 | /* Build a new card device */ | |
d4c53ae8 | 2064 | comp_type = ap_get_compatible_type(qid, hwinfo.at, hwinfo.fac); |
4f2fcccd HF |
2065 | if (!comp_type) { |
2066 | AP_DBF_WARN("%s(%d) type %d, can't get compatibility type\n", | |
d4c53ae8 | 2067 | __func__, ap, hwinfo.at); |
4f2fcccd HF |
2068 | return; |
2069 | } | |
d4c53ae8 | 2070 | ac = ap_card_create(ap, hwinfo, comp_type); |
a7b1868a | 2071 | if (!ac) { |
4f2fcccd HF |
2072 | AP_DBF_WARN("%s(%d) ap_card_create() failed\n", |
2073 | __func__, ap); | |
2074 | return; | |
a7b1868a | 2075 | } |
4f2fcccd | 2076 | ac->config = !decfg; |
a7e701db | 2077 | ac->chkstop = chkstop; |
4f2fcccd HF |
2078 | dev = &ac->ap_dev.device; |
2079 | dev->bus = &ap_bus_type; | |
2080 | dev->parent = ap_root_device; | |
2081 | dev_set_name(dev, "card%02x", ap); | |
bd39654a HF |
2082 | /* maybe enlarge ap_max_msg_size to support this card */ |
2083 | if (ac->maxmsgsize > atomic_read(&ap_max_msg_size)) { | |
2084 | atomic_set(&ap_max_msg_size, ac->maxmsgsize); | |
2085 | AP_DBF_INFO("%s(%d) ap_max_msg_size update to %d byte\n", | |
3f74eb5f HF |
2086 | __func__, ap, |
2087 | atomic_read(&ap_max_msg_size)); | |
bd39654a | 2088 | } |
4f2fcccd HF |
2089 | /* Register the new card device with AP bus */ |
2090 | rc = device_register(dev); | |
a7b1868a | 2091 | if (rc) { |
4f2fcccd HF |
2092 | AP_DBF_WARN("%s(%d) device_register() failed\n", |
2093 | __func__, ap); | |
2094 | put_device(dev); | |
2095 | return; | |
3f3007af | 2096 | } |
4f2fcccd HF |
2097 | /* get it and thus adjust reference counter */ |
2098 | get_device(dev); | |
2099 | if (decfg) | |
3f74eb5f | 2100 | AP_DBF_INFO("%s(%d) new (decfg) card dev type=%d func=0x%08x created\n", |
d4c53ae8 | 2101 | __func__, ap, hwinfo.at, hwinfo.fac); |
a7e701db HF |
2102 | else if (chkstop) |
2103 | AP_DBF_INFO("%s(%d) new (chkstop) card dev type=%d func=0x%08x created\n", | |
d4c53ae8 | 2104 | __func__, ap, hwinfo.at, hwinfo.fac); |
4f2fcccd | 2105 | else |
3f74eb5f | 2106 | AP_DBF_INFO("%s(%d) new card dev type=%d func=0x%08x created\n", |
d4c53ae8 | 2107 | __func__, ap, hwinfo.at, hwinfo.fac); |
4f2fcccd HF |
2108 | } |
2109 | ||
2110 | /* Verify the domains and the queue devices for this card */ | |
2111 | ap_scan_domains(ac); | |
a7b1868a | 2112 | |
4f2fcccd HF |
2113 | /* release the card device */ |
2114 | put_device(&ac->ap_dev.device); | |
a7b1868a | 2115 | } |
ac994e80 | 2116 | |
28391585 TK |
2117 | /** |
2118 | * ap_get_configuration - get the host AP configuration | |
2119 | * | |
2120 | * Stores the host AP configuration information returned from the previous call | |
2121 | * to Query Configuration Information (QCI), then retrieves and stores the | |
2122 | * current AP configuration returned from QCI. | |
2123 | * | |
2124 | * Return: true if the host AP configuration changed between calls to QCI; | |
2125 | * otherwise, return false. | |
2126 | */ | |
2127 | static bool ap_get_configuration(void) | |
2128 | { | |
8dec9cb9 | 2129 | if (!ap_qci_info->flags) /* QCI not supported */ |
0fef40be HF |
2130 | return false; |
2131 | ||
28391585 | 2132 | memcpy(ap_qci_info_old, ap_qci_info, sizeof(*ap_qci_info)); |
8dec9cb9 | 2133 | ap_qci(ap_qci_info); |
28391585 TK |
2134 | |
2135 | return memcmp(ap_qci_info, ap_qci_info_old, | |
2136 | sizeof(struct ap_config_info)) != 0; | |
2137 | } | |
2138 | ||
778412ab HF |
2139 | /* |
2140 | * ap_config_has_new_aps - Check current against old qci info if | |
2141 | * new adapters have appeared. Returns true if at least one new | |
2142 | * adapter in the apm mask is showing up. Existing adapters or | |
2143 | * receding adapters are not counted. | |
2144 | */ | |
2145 | static bool ap_config_has_new_aps(void) | |
2146 | { | |
2147 | ||
2148 | unsigned long m[BITS_TO_LONGS(AP_DEVICES)]; | |
2149 | ||
8dec9cb9 | 2150 | if (!ap_qci_info->flags) |
778412ab HF |
2151 | return false; |
2152 | ||
2153 | bitmap_andnot(m, (unsigned long *)ap_qci_info->apm, | |
2154 | (unsigned long *)ap_qci_info_old->apm, AP_DEVICES); | |
2155 | if (!bitmap_empty(m, AP_DEVICES)) | |
2156 | return true; | |
2157 | ||
2158 | return false; | |
2159 | } | |
2160 | ||
2161 | /* | |
2162 | * ap_config_has_new_doms - Check current against old qci info if | |
2163 | * new (usage) domains have appeared. Returns true if at least one | |
2164 | * new domain in the aqm mask is showing up. Existing domains or | |
2165 | * receding domains are not counted. | |
2166 | */ | |
2167 | static bool ap_config_has_new_doms(void) | |
2168 | { | |
2169 | unsigned long m[BITS_TO_LONGS(AP_DOMAINS)]; | |
2170 | ||
8dec9cb9 | 2171 | if (!ap_qci_info->flags) |
778412ab HF |
2172 | return false; |
2173 | ||
2174 | bitmap_andnot(m, (unsigned long *)ap_qci_info->aqm, | |
2175 | (unsigned long *)ap_qci_info_old->aqm, AP_DOMAINS); | |
2176 | if (!bitmap_empty(m, AP_DOMAINS)) | |
2177 | return true; | |
2178 | ||
2179 | return false; | |
2180 | } | |
2181 | ||
a7b1868a HF |
2182 | /** |
2183 | * ap_scan_bus(): Scan the AP bus for new devices | |
eacf5b36 HF |
2184 | * Always run under mutex ap_scan_bus_mutex protection |
2185 | * which needs to get locked/unlocked by the caller! | |
b5caf05e | 2186 | * Returns true if any config change has been detected |
eacf5b36 | 2187 | * during the scan, otherwise false. |
a7b1868a | 2188 | */ |
b5caf05e | 2189 | static bool ap_scan_bus(void) |
a7b1868a | 2190 | { |
b5caf05e HF |
2191 | bool config_changed; |
2192 | int ap; | |
a7b1868a | 2193 | |
08b2c370 HF |
2194 | pr_debug(">%s\n", __func__); |
2195 | ||
778412ab | 2196 | /* (re-)fetch configuration via QCI */ |
28391585 | 2197 | config_changed = ap_get_configuration(); |
778412ab HF |
2198 | if (config_changed) { |
2199 | if (ap_config_has_new_aps() || ap_config_has_new_doms()) { | |
2200 | /* | |
2201 | * Appearance of new adapters and/or domains need to | |
2202 | * build new ap devices which need to get bound to an | |
2203 | * device driver. Thus reset the APQN bindings complete | |
2204 | * completion. | |
2205 | */ | |
2206 | reinit_completion(&ap_apqn_bindings_complete); | |
2207 | } | |
2208 | /* post a config change notify */ | |
28391585 | 2209 | notify_config_changed(); |
778412ab | 2210 | } |
a7b1868a HF |
2211 | ap_select_domain(); |
2212 | ||
2213 | /* loop over all possible adapters */ | |
4f2fcccd HF |
2214 | for (ap = 0; ap <= ap_max_adapter_id; ap++) |
2215 | ap_scan_adapter(ap); | |
a7b1868a | 2216 | |
28391585 TK |
2217 | /* scan complete notify */ |
2218 | if (config_changed) | |
2219 | notify_scan_complete(); | |
2220 | ||
a7b1868a HF |
2221 | /* check if there is at least one queue available with default domain */ |
2222 | if (ap_domain_index >= 0) { | |
2223 | struct device *dev = | |
2224 | bus_find_device(&ap_bus_type, NULL, | |
2004b57c | 2225 | (void *)(long)ap_domain_index, |
b1af7528 | 2226 | __match_queue_device_with_queue_id); |
a7b1868a HF |
2227 | if (dev) |
2228 | put_device(dev); | |
2229 | else | |
3f74eb5f HF |
2230 | AP_DBF_INFO("%s no queue device with default domain %d available\n", |
2231 | __func__, ap_domain_index); | |
a7b1868a | 2232 | } |
ac994e80 | 2233 | |
837cd105 | 2234 | if (atomic64_inc_return(&ap_scan_bus_count) == 1) { |
08b2c370 | 2235 | pr_debug("%s init scan complete\n", __func__); |
837cd105 | 2236 | ap_send_init_scan_done_uevent(); |
837cd105 HF |
2237 | } |
2238 | ||
778412ab HF |
2239 | ap_check_bindings_complete(); |
2240 | ||
99b3126e | 2241 | mod_timer(&ap_scan_bus_timer, jiffies + ap_scan_bus_time * HZ); |
08b2c370 | 2242 | |
b5caf05e HF |
2243 | pr_debug("<%s config_changed=%d\n", __func__, config_changed); |
2244 | ||
2245 | return config_changed; | |
1534c382 MS |
2246 | } |
2247 | ||
99b3126e HF |
2248 | /* |
2249 | * Callback for the ap_scan_bus_timer | |
b5caf05e | 2250 | * Runs periodically, workqueue timer (ap_scan_bus_time) |
99b3126e HF |
2251 | */ |
2252 | static void ap_scan_bus_timer_callback(struct timer_list *unused) | |
1534c382 | 2253 | { |
99b3126e HF |
2254 | /* |
2255 | * schedule work into the system long wq which when | |
2256 | * the work is finally executed, calls the AP bus scan. | |
2257 | */ | |
2258 | queue_work(system_long_wq, &ap_scan_bus_work); | |
1534c382 | 2259 | } |
13e742ba | 2260 | |
b5caf05e HF |
2261 | /* |
2262 | * Callback for the ap_scan_bus_work | |
2263 | */ | |
2264 | static void ap_scan_bus_wq_callback(struct work_struct *unused) | |
2265 | { | |
eacf5b36 HF |
2266 | /* |
2267 | * Try to invoke an ap_scan_bus(). If the mutex acquisition | |
2268 | * fails there is currently another task already running the | |
2269 | * AP scan bus and there is no need to wait and re-trigger the | |
2270 | * scan again. Please note at the end of the scan bus function | |
2271 | * the AP scan bus timer is re-armed which triggers then the | |
2272 | * ap_scan_bus_timer_callback which enqueues a work into the | |
2273 | * system_long_wq which invokes this function here again. | |
2274 | */ | |
2275 | if (mutex_trylock(&ap_scan_bus_mutex)) { | |
2276 | ap_scan_bus_result = ap_scan_bus(); | |
2277 | mutex_unlock(&ap_scan_bus_mutex); | |
2278 | } | |
b5caf05e HF |
2279 | } |
2280 | ||
12376084 HD |
2281 | static inline void __exit ap_async_exit(void) |
2282 | { | |
2283 | if (ap_thread_flag) | |
2284 | ap_poll_thread_stop(); | |
2285 | chsc_notifier_unregister(&ap_bus_nb); | |
2286 | cancel_work(&ap_scan_bus_work); | |
2287 | hrtimer_cancel(&ap_poll_timer); | |
2288 | timer_delete(&ap_scan_bus_timer); | |
2289 | } | |
2290 | ||
170660cc HD |
2291 | static inline int __init ap_async_init(void) |
2292 | { | |
2293 | int rc; | |
2294 | ||
2295 | /* Setup the AP bus rescan timer. */ | |
2296 | timer_setup(&ap_scan_bus_timer, ap_scan_bus_timer_callback, 0); | |
2297 | ||
2298 | /* | |
2299 | * Setup the high resolution poll timer. | |
2300 | * If we are running under z/VM adjust polling to z/VM polling rate. | |
2301 | */ | |
2302 | if (MACHINE_IS_VM) | |
2303 | poll_high_timeout = 1500000; | |
2304 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); | |
2305 | ap_poll_timer.function = ap_poll_timeout; | |
2306 | ||
2307 | queue_work(system_long_wq, &ap_scan_bus_work); | |
2308 | ||
2a483d33 HD |
2309 | rc = chsc_notifier_register(&ap_bus_nb); |
2310 | if (rc) | |
2311 | goto out; | |
2312 | ||
170660cc HD |
2313 | /* Start the low priority AP bus poll thread. */ |
2314 | if (!ap_thread_flag) | |
2315 | return 0; | |
2316 | ||
2317 | rc = ap_poll_thread_start(); | |
2318 | if (rc) | |
2a483d33 | 2319 | goto out_notifier; |
170660cc HD |
2320 | |
2321 | return 0; | |
2322 | ||
2a483d33 HD |
2323 | out_notifier: |
2324 | chsc_notifier_unregister(&ap_bus_nb); | |
170660cc HD |
2325 | out: |
2326 | cancel_work(&ap_scan_bus_work); | |
2327 | hrtimer_cancel(&ap_poll_timer); | |
2328 | timer_delete(&ap_scan_bus_timer); | |
2329 | return rc; | |
2330 | } | |
2331 | ||
2332 | static inline void ap_irq_exit(void) | |
2333 | { | |
2334 | if (ap_irq_flag) | |
2335 | unregister_adapter_interrupt(&ap_airq); | |
2336 | } | |
2337 | ||
2338 | static inline int __init ap_irq_init(void) | |
2339 | { | |
2340 | int rc; | |
2341 | ||
2342 | if (!ap_interrupts_available() || !ap_useirq) | |
2343 | return 0; | |
2344 | ||
2345 | rc = register_adapter_interrupt(&ap_airq); | |
2346 | ap_irq_flag = (rc == 0); | |
2347 | ||
2348 | return rc; | |
2349 | } | |
2350 | ||
2351 | static inline void ap_debug_exit(void) | |
2352 | { | |
2353 | debug_unregister(ap_dbf_info); | |
2354 | } | |
2355 | ||
2356 | static inline int __init ap_debug_init(void) | |
cccd85bf | 2357 | { |
3f74eb5f | 2358 | ap_dbf_info = debug_register("ap", 2, 1, |
88e4c0da | 2359 | AP_DBF_MAX_SPRINTF_ARGS * sizeof(long)); |
cccd85bf HF |
2360 | debug_register_view(ap_dbf_info, &debug_sprintf_view); |
2361 | debug_set_level(ap_dbf_info, DBF_ERR); | |
2362 | ||
2363 | return 0; | |
2364 | } | |
2365 | ||
7e0bdbe5 HF |
2366 | static void __init ap_perms_init(void) |
2367 | { | |
2004b57c | 2368 | /* all resources usable if no kernel parameter string given */ |
00fab235 | 2369 | memset(&ap_perms.ioctlm, 0xFF, sizeof(ap_perms.ioctlm)); |
7e0bdbe5 HF |
2370 | memset(&ap_perms.apm, 0xFF, sizeof(ap_perms.apm)); |
2371 | memset(&ap_perms.aqm, 0xFF, sizeof(ap_perms.aqm)); | |
2372 | ||
3d8f60d3 | 2373 | /* apm kernel parameter string */ |
7e0bdbe5 | 2374 | if (apm_str) { |
3d8f60d3 | 2375 | memset(&ap_perms.apm, 0, sizeof(ap_perms.apm)); |
00fab235 HF |
2376 | ap_parse_mask_str(apm_str, ap_perms.apm, AP_DEVICES, |
2377 | &ap_perms_mutex); | |
7e0bdbe5 | 2378 | } |
7e0bdbe5 | 2379 | |
3d8f60d3 HF |
2380 | /* aqm kernel parameter string */ |
2381 | if (aqm_str) { | |
2382 | memset(&ap_perms.aqm, 0, sizeof(ap_perms.aqm)); | |
00fab235 HF |
2383 | ap_parse_mask_str(aqm_str, ap_perms.aqm, AP_DOMAINS, |
2384 | &ap_perms_mutex); | |
7e0bdbe5 HF |
2385 | } |
2386 | } | |
2387 | ||
1534c382 | 2388 | /** |
1749a81d FB |
2389 | * ap_module_init(): The module initialization code. |
2390 | * | |
2391 | * Initializes the module. | |
1534c382 | 2392 | */ |
efda7ade | 2393 | static int __init ap_module_init(void) |
1534c382 | 2394 | { |
8cb4c20f | 2395 | int rc; |
1534c382 | 2396 | |
cccd85bf HF |
2397 | rc = ap_debug_init(); |
2398 | if (rc) | |
2399 | return rc; | |
2400 | ||
2395103b | 2401 | if (!ap_instructions_available()) { |
889875a1 MS |
2402 | pr_warn("The hardware system does not support AP instructions\n"); |
2403 | return -ENODEV; | |
2404 | } | |
2405 | ||
bc4b295e HF |
2406 | /* init ap_queue hashtable */ |
2407 | hash_init(ap_queues); | |
2408 | ||
00fab235 | 2409 | /* set up the AP permissions (ioctls, ap and aq masks) */ |
7e0bdbe5 HF |
2410 | ap_perms_init(); |
2411 | ||
889875a1 | 2412 | /* Get AP configuration data if available */ |
c8337c47 HF |
2413 | ap_init_qci_info(); |
2414 | ||
2415 | /* check default domain setting */ | |
2416 | if (ap_domain_index < -1 || ap_domain_index > ap_max_domain_id || | |
7e0bdbe5 HF |
2417 | (ap_domain_index >= 0 && |
2418 | !test_bit_inv(ap_domain_index, ap_perms.aqm))) { | |
889875a1 MS |
2419 | pr_warn("%d is not a valid cryptographic domain\n", |
2420 | ap_domain_index); | |
ac994e80 | 2421 | ap_domain_index = -1; |
1534c382 | 2422 | } |
5314af69 | 2423 | |
1534c382 MS |
2424 | /* Create /sys/bus/ap. */ |
2425 | rc = bus_register(&ap_bus_type); | |
2426 | if (rc) | |
3c7a3773 | 2427 | goto out; |
1534c382 MS |
2428 | |
2429 | /* Create /sys/devices/ap. */ | |
035da16f | 2430 | ap_root_device = root_device_register("ap"); |
9c705206 | 2431 | rc = PTR_ERR_OR_ZERO(ap_root_device); |
1534c382 MS |
2432 | if (rc) |
2433 | goto out_bus; | |
837cd105 | 2434 | ap_root_device->bus = &ap_bus_type; |
1534c382 | 2435 | |
3c7a3773 HD |
2436 | /* enable interrupts if available */ |
2437 | rc = ap_irq_init(); | |
2438 | if (rc) | |
2439 | goto out_device; | |
2440 | ||
170660cc HD |
2441 | /* Setup asynchronous work (timers, workqueue, etc). */ |
2442 | rc = ap_async_init(); | |
2443 | if (rc) | |
3c7a3773 | 2444 | goto out_irq; |
3f3007af | 2445 | |
1534c382 MS |
2446 | return 0; |
2447 | ||
3c7a3773 HD |
2448 | out_irq: |
2449 | ap_irq_exit(); | |
170660cc | 2450 | out_device: |
035da16f | 2451 | root_device_unregister(ap_root_device); |
1534c382 | 2452 | out_bus: |
1534c382 MS |
2453 | bus_unregister(&ap_bus_type); |
2454 | out: | |
170660cc | 2455 | ap_debug_exit(); |
1534c382 MS |
2456 | return rc; |
2457 | } | |
12376084 HD |
2458 | |
2459 | static void __exit ap_module_exit(void) | |
2460 | { | |
2461 | ap_async_exit(); | |
2462 | ap_irq_exit(); | |
2463 | root_device_unregister(ap_root_device); | |
2464 | bus_unregister(&ap_bus_type); | |
2465 | ap_debug_exit(); | |
2466 | } | |
2467 | ||
2468 | module_init(ap_module_init); | |
2469 | module_exit(ap_module_exit); |