Commit | Line | Data |
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812141a9 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1534c382 | 2 | /* |
0677519a | 3 | * Copyright IBM Corp. 2006, 2021 |
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> |
60063497 | 30 | #include <linux/atomic.h> |
cb17a636 | 31 | #include <asm/isc.h> |
fe137230 FB |
32 | #include <linux/hrtimer.h> |
33 | #include <linux/ktime.h> | |
a0616cde | 34 | #include <asm/facility.h> |
5d26a105 | 35 | #include <linux/crypto.h> |
e28d2af4 | 36 | #include <linux/mod_devicetable.h> |
cccd85bf | 37 | #include <linux/debugfs.h> |
7e0bdbe5 | 38 | #include <linux/ctype.h> |
1534c382 MS |
39 | |
40 | #include "ap_bus.h" | |
cccd85bf | 41 | #include "ap_debug.h" |
1534c382 | 42 | |
1749a81d | 43 | /* |
50a0d46c | 44 | * Module parameters; note though this file itself isn't modular. |
1534c382 MS |
45 | */ |
46 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ | |
fc1d3f02 | 47 | static DEFINE_SPINLOCK(ap_domain_lock); |
ac2b96f3 | 48 | module_param_named(domain, ap_domain_index, int, 0440); |
1534c382 MS |
49 | MODULE_PARM_DESC(domain, "domain index for ap devices"); |
50 | EXPORT_SYMBOL(ap_domain_index); | |
51 | ||
ac2b96f3 HF |
52 | static int ap_thread_flag; |
53 | module_param_named(poll_thread, ap_thread_flag, int, 0440); | |
b90b34c6 | 54 | MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)."); |
1534c382 | 55 | |
7e0bdbe5 HF |
56 | static char *apm_str; |
57 | module_param_named(apmask, apm_str, charp, 0440); | |
58 | MODULE_PARM_DESC(apmask, "AP bus adapter mask."); | |
59 | ||
60 | static char *aqm_str; | |
61 | module_param_named(aqmask, aqm_str, charp, 0440); | |
62 | MODULE_PARM_DESC(aqmask, "AP bus domain mask."); | |
63 | ||
bd39654a HF |
64 | atomic_t ap_max_msg_size = ATOMIC_INIT(AP_DEFAULT_MAX_MSG_SIZE); |
65 | EXPORT_SYMBOL(ap_max_msg_size); | |
66 | ||
e28d2af4 IT |
67 | static struct device *ap_root_device; |
68 | ||
bc4b295e HF |
69 | /* Hashtable of all queue devices on the AP bus */ |
70 | DEFINE_HASHTABLE(ap_queues, 8); | |
71 | /* lock used for the ap_queues hashtable */ | |
72 | DEFINE_SPINLOCK(ap_queues_lock); | |
e28d2af4 | 73 | |
00fab235 HF |
74 | /* Default permissions (ioctl, card and domain masking) */ |
75 | struct ap_perms ap_perms; | |
76 | EXPORT_SYMBOL(ap_perms); | |
77 | DEFINE_MUTEX(ap_perms_mutex); | |
78 | EXPORT_SYMBOL(ap_perms_mutex); | |
7e0bdbe5 | 79 | |
837cd105 HF |
80 | /* # of bus scans since init */ |
81 | static atomic64_t ap_scan_bus_count; | |
82 | ||
0677519a HF |
83 | /* # of bindings complete since init */ |
84 | static atomic64_t ap_bindings_complete_count = ATOMIC64_INIT(0); | |
85 | ||
837cd105 HF |
86 | /* completion for initial APQN bindings complete */ |
87 | static DECLARE_COMPLETION(ap_init_apqn_bindings_complete); | |
88 | ||
c8337c47 | 89 | static struct ap_config_info *ap_qci_info; |
1534c382 | 90 | |
cccd85bf HF |
91 | /* |
92 | * AP bus related debug feature things. | |
93 | */ | |
cccd85bf HF |
94 | debug_info_t *ap_dbf_info; |
95 | ||
1749a81d | 96 | /* |
8139b89d | 97 | * Workqueue timer for bus rescan. |
1534c382 | 98 | */ |
1534c382 MS |
99 | static struct timer_list ap_config_timer; |
100 | static int ap_config_time = AP_CONFIG_TIME; | |
3f3007af | 101 | static void ap_scan_bus(struct work_struct *); |
8139b89d | 102 | static DECLARE_WORK(ap_scan_work, ap_scan_bus); |
1534c382 | 103 | |
1749a81d | 104 | /* |
cb17a636 | 105 | * Tasklet & timer for AP request polling and interrupts |
1534c382 | 106 | */ |
3f3007af | 107 | static void ap_tasklet_fn(unsigned long); |
b13fecb1 | 108 | static DECLARE_TASKLET_OLD(ap_tasklet, ap_tasklet_fn); |
1534c382 | 109 | static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait); |
ac2b96f3 | 110 | static struct task_struct *ap_poll_kthread; |
1534c382 | 111 | static DEFINE_MUTEX(ap_poll_thread_mutex); |
93521314 | 112 | static DEFINE_SPINLOCK(ap_poll_timer_lock); |
fe137230 | 113 | static struct hrtimer ap_poll_timer; |
ac2b96f3 HF |
114 | /* |
115 | * In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds. | |
116 | * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling. | |
117 | */ | |
fe137230 | 118 | static unsigned long long poll_timeout = 250000; |
1534c382 | 119 | |
c8337c47 HF |
120 | /* Maximum domain id, if not given via qci */ |
121 | static int ap_max_domain_id = 15; | |
122 | /* Maximum adapter id, if not given via qci */ | |
123 | static int ap_max_adapter_id = 63; | |
41677b1d | 124 | |
772f5472 FB |
125 | static struct bus_type ap_bus_type; |
126 | ||
f4eae94f | 127 | /* Adapter interrupt definitions */ |
30e63ef2 | 128 | static void ap_interrupt_handler(struct airq_struct *airq, bool floating); |
3f3007af | 129 | |
f4eae94f MS |
130 | static int ap_airq_flag; |
131 | ||
132 | static struct airq_struct ap_airq = { | |
133 | .handler = ap_interrupt_handler, | |
134 | .isc = AP_ISC, | |
135 | }; | |
136 | ||
cb17a636 FB |
137 | /** |
138 | * ap_using_interrupts() - Returns non-zero if interrupt support is | |
139 | * available. | |
140 | */ | |
141 | static inline int ap_using_interrupts(void) | |
142 | { | |
f4eae94f | 143 | return ap_airq_flag; |
cb17a636 FB |
144 | } |
145 | ||
e28d2af4 IT |
146 | /** |
147 | * ap_airq_ptr() - Get the address of the adapter interrupt indicator | |
148 | * | |
149 | * Returns the address of the local-summary-indicator of the adapter | |
150 | * interrupt handler for AP, or NULL if adapter interrupts are not | |
151 | * available. | |
152 | */ | |
153 | void *ap_airq_ptr(void) | |
154 | { | |
155 | if (ap_using_interrupts()) | |
156 | return ap_airq.lsi_ptr; | |
157 | return NULL; | |
158 | } | |
159 | ||
cb17a636 FB |
160 | /** |
161 | * ap_interrupts_available(): Test if AP interrupts are available. | |
162 | * | |
163 | * Returns 1 if AP interrupts are available. | |
164 | */ | |
165 | static int ap_interrupts_available(void) | |
166 | { | |
86cd741b | 167 | return test_facility(65); |
cb17a636 FB |
168 | } |
169 | ||
75014550 | 170 | /** |
c8337c47 HF |
171 | * ap_qci_available(): Test if AP configuration |
172 | * information can be queried via QCI subfunction. | |
75014550 | 173 | * |
c8337c47 | 174 | * Returns 1 if subfunction PQAP(QCI) is available. |
75014550 | 175 | */ |
c8337c47 | 176 | static int ap_qci_available(void) |
75014550 | 177 | { |
86cd741b | 178 | return test_facility(12); |
75014550 HD |
179 | } |
180 | ||
e7fc5146 TK |
181 | /** |
182 | * ap_apft_available(): Test if AP facilities test (APFT) | |
183 | * facility is available. | |
184 | * | |
185 | * Returns 1 if APFT is is available. | |
186 | */ | |
187 | static int ap_apft_available(void) | |
188 | { | |
189 | return test_facility(15); | |
190 | } | |
191 | ||
9a564108 HF |
192 | /* |
193 | * ap_qact_available(): Test if the PQAP(QACT) subfunction is available. | |
194 | * | |
195 | * Returns 1 if the QACT subfunction is available. | |
196 | */ | |
197 | static inline int ap_qact_available(void) | |
198 | { | |
c8337c47 HF |
199 | if (ap_qci_info) |
200 | return ap_qci_info->qact; | |
9a564108 HF |
201 | return 0; |
202 | } | |
203 | ||
050349b5 | 204 | /* |
c8337c47 | 205 | * ap_fetch_qci_info(): Fetch cryptographic config info |
050349b5 HF |
206 | * |
207 | * Returns the ap configuration info fetched via PQAP(QCI). | |
208 | * On success 0 is returned, on failure a negative errno | |
209 | * is returned, e.g. if the PQAP(QCI) instruction is not | |
210 | * available, the return value will be -EOPNOTSUPP. | |
211 | */ | |
c8337c47 | 212 | static inline int ap_fetch_qci_info(struct ap_config_info *info) |
11d37673 | 213 | { |
c8337c47 | 214 | if (!ap_qci_available()) |
11d37673 | 215 | return -EOPNOTSUPP; |
050349b5 HF |
216 | if (!info) |
217 | return -EINVAL; | |
218 | return ap_qci(info); | |
11d37673 HC |
219 | } |
220 | ||
889875a1 | 221 | /** |
c8337c47 HF |
222 | * ap_init_qci_info(): Allocate and query qci config info. |
223 | * Does also update the static variables ap_max_domain_id | |
224 | * and ap_max_adapter_id if this info is available. | |
225 | ||
889875a1 | 226 | */ |
c8337c47 | 227 | static void __init ap_init_qci_info(void) |
889875a1 | 228 | { |
c8337c47 | 229 | if (!ap_qci_available()) { |
2ea2a609 | 230 | AP_DBF_INFO("%s QCI not supported\n", __func__); |
889875a1 | 231 | return; |
c8337c47 | 232 | } |
889875a1 | 233 | |
c8337c47 HF |
234 | ap_qci_info = kzalloc(sizeof(*ap_qci_info), GFP_KERNEL); |
235 | if (!ap_qci_info) | |
889875a1 | 236 | return; |
c8337c47 HF |
237 | if (ap_fetch_qci_info(ap_qci_info) != 0) { |
238 | kfree(ap_qci_info); | |
239 | ap_qci_info = NULL; | |
889875a1 MS |
240 | return; |
241 | } | |
2ea2a609 | 242 | AP_DBF_INFO("%s successful fetched initial qci info\n", __func__); |
c8337c47 HF |
243 | |
244 | if (ap_qci_info->apxa) { | |
245 | if (ap_qci_info->Na) { | |
246 | ap_max_adapter_id = ap_qci_info->Na; | |
2ea2a609 HF |
247 | AP_DBF_INFO("%s new ap_max_adapter_id is %d\n", |
248 | __func__, ap_max_adapter_id); | |
c8337c47 HF |
249 | } |
250 | if (ap_qci_info->Nd) { | |
251 | ap_max_domain_id = ap_qci_info->Nd; | |
2ea2a609 HF |
252 | AP_DBF_INFO("%s new ap_max_domain_id is %d\n", |
253 | __func__, ap_max_domain_id); | |
c8337c47 HF |
254 | } |
255 | } | |
889875a1 MS |
256 | } |
257 | ||
258 | /* | |
259 | * ap_test_config(): helper function to extract the nrth bit | |
260 | * within the unsigned int array field. | |
261 | */ | |
262 | static inline int ap_test_config(unsigned int *field, unsigned int nr) | |
263 | { | |
264 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
265 | } | |
266 | ||
267 | /* | |
268 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
889875a1 MS |
269 | * |
270 | * Returns 0 if the card is not configured | |
271 | * 1 if the card is configured or | |
272 | * if the configuration information is not available | |
273 | */ | |
274 | static inline int ap_test_config_card_id(unsigned int id) | |
275 | { | |
c8337c47 HF |
276 | if (id > ap_max_adapter_id) |
277 | return 0; | |
278 | if (ap_qci_info) | |
279 | return ap_test_config(ap_qci_info->apm, id); | |
280 | return 1; | |
889875a1 MS |
281 | } |
282 | ||
283 | /* | |
7379e652 HF |
284 | * ap_test_config_usage_domain(): Test, whether an AP usage domain |
285 | * is configured. | |
889875a1 MS |
286 | * |
287 | * Returns 0 if the usage domain is not configured | |
288 | * 1 if the usage domain is configured or | |
289 | * if the configuration information is not available | |
290 | */ | |
7379e652 | 291 | int ap_test_config_usage_domain(unsigned int domain) |
889875a1 | 292 | { |
c8337c47 HF |
293 | if (domain > ap_max_domain_id) |
294 | return 0; | |
295 | if (ap_qci_info) | |
296 | return ap_test_config(ap_qci_info->aqm, domain); | |
297 | return 1; | |
889875a1 | 298 | } |
7379e652 HF |
299 | EXPORT_SYMBOL(ap_test_config_usage_domain); |
300 | ||
301 | /* | |
302 | * ap_test_config_ctrl_domain(): Test, whether an AP control domain | |
303 | * is configured. | |
304 | * @domain AP control domain ID | |
305 | * | |
306 | * Returns 1 if the control domain is configured | |
307 | * 0 in all other cases | |
308 | */ | |
309 | int ap_test_config_ctrl_domain(unsigned int domain) | |
310 | { | |
c8337c47 | 311 | if (!ap_qci_info || domain > ap_max_domain_id) |
7379e652 | 312 | return 0; |
c8337c47 | 313 | return ap_test_config(ap_qci_info->adm, domain); |
7379e652 HF |
314 | } |
315 | EXPORT_SYMBOL(ap_test_config_ctrl_domain); | |
889875a1 | 316 | |
c8337c47 HF |
317 | /* |
318 | * ap_queue_info(): Check and get AP queue info. | |
319 | * Returns true if TAPQ succeeded and the info is filled or | |
320 | * false otherwise. | |
1534c382 | 321 | */ |
bd39654a HF |
322 | static bool ap_queue_info(ap_qid_t qid, int *q_type, unsigned int *q_fac, |
323 | int *q_depth, int *q_ml, bool *q_decfg) | |
1534c382 MS |
324 | { |
325 | struct ap_queue_status status; | |
bd39654a HF |
326 | union { |
327 | unsigned long value; | |
328 | struct { | |
329 | unsigned int fac : 32; /* facility bits */ | |
330 | unsigned int at : 8; /* ap type */ | |
331 | unsigned int _res1 : 8; | |
332 | unsigned int _res2 : 4; | |
333 | unsigned int ml : 4; /* apxl ml */ | |
334 | unsigned int _res3 : 4; | |
335 | unsigned int qd : 4; /* queue depth */ | |
336 | } tapq_gr2; | |
337 | } tapq_info; | |
338 | ||
339 | tapq_info.value = 0; | |
889875a1 | 340 | |
c8337c47 HF |
341 | /* make sure we don't run into a specifiation exception */ |
342 | if (AP_QID_CARD(qid) > ap_max_adapter_id || | |
343 | AP_QID_QUEUE(qid) > ap_max_domain_id) | |
344 | return false; | |
1534c382 | 345 | |
c8337c47 | 346 | /* call TAPQ on this APQN */ |
bd39654a | 347 | status = ap_test_queue(qid, ap_apft_available(), &tapq_info.value); |
c50a160c IT |
348 | switch (status.response_code) { |
349 | case AP_RESPONSE_NORMAL: | |
c8337c47 | 350 | case AP_RESPONSE_RESET_IN_PROGRESS: |
4f2fcccd HF |
351 | case AP_RESPONSE_DECONFIGURED: |
352 | case AP_RESPONSE_CHECKSTOPPED: | |
353 | case AP_RESPONSE_BUSY: | |
c8337c47 HF |
354 | /* |
355 | * According to the architecture in all these cases the | |
356 | * info should be filled. All bits 0 is not possible as | |
357 | * there is at least one of the mode bits set. | |
358 | */ | |
bd39654a | 359 | if (WARN_ON_ONCE(!tapq_info.value)) |
c8337c47 | 360 | return false; |
bd39654a HF |
361 | *q_type = tapq_info.tapq_gr2.at; |
362 | *q_fac = tapq_info.tapq_gr2.fac; | |
363 | *q_depth = tapq_info.tapq_gr2.qd; | |
364 | *q_ml = tapq_info.tapq_gr2.ml; | |
4f2fcccd | 365 | *q_decfg = status.response_code == AP_RESPONSE_DECONFIGURED; |
c8337c47 | 366 | switch (*q_type) { |
14878424 | 367 | /* For CEX2 and CEX3 the available functions |
a7b1868a | 368 | * are not reflected by the facilities bits. |
14878424 HF |
369 | * Instead it is coded into the type. So here |
370 | * modify the function bits based on the type. | |
371 | */ | |
372 | case AP_DEVICE_TYPE_CEX2A: | |
373 | case AP_DEVICE_TYPE_CEX3A: | |
c8337c47 | 374 | *q_fac |= 0x08000000; |
14878424 HF |
375 | break; |
376 | case AP_DEVICE_TYPE_CEX2C: | |
377 | case AP_DEVICE_TYPE_CEX3C: | |
c8337c47 | 378 | *q_fac |= 0x10000000; |
14878424 HF |
379 | break; |
380 | default: | |
381 | break; | |
382 | } | |
c8337c47 | 383 | return true; |
c50a160c | 384 | default: |
c8337c47 HF |
385 | /* |
386 | * A response code which indicates, there is no info available. | |
387 | */ | |
388 | return false; | |
1534c382 | 389 | } |
1534c382 MS |
390 | } |
391 | ||
dc4b6ded | 392 | void ap_wait(enum ap_sm_wait wait) |
3f3007af MS |
393 | { |
394 | ktime_t hr_time; | |
395 | ||
396 | switch (wait) { | |
dc4b6ded HF |
397 | case AP_SM_WAIT_AGAIN: |
398 | case AP_SM_WAIT_INTERRUPT: | |
3f3007af MS |
399 | if (ap_using_interrupts()) |
400 | break; | |
401 | if (ap_poll_kthread) { | |
402 | wake_up(&ap_poll_wait); | |
403 | break; | |
404 | } | |
fcf0220a | 405 | fallthrough; |
dc4b6ded | 406 | case AP_SM_WAIT_TIMEOUT: |
3f3007af MS |
407 | spin_lock_bh(&ap_poll_timer_lock); |
408 | if (!hrtimer_is_queued(&ap_poll_timer)) { | |
8b0e1953 | 409 | hr_time = poll_timeout; |
3f3007af MS |
410 | hrtimer_forward_now(&ap_poll_timer, hr_time); |
411 | hrtimer_restart(&ap_poll_timer); | |
412 | } | |
413 | spin_unlock_bh(&ap_poll_timer_lock); | |
414 | break; | |
dc4b6ded | 415 | case AP_SM_WAIT_NONE: |
3f3007af MS |
416 | default: |
417 | break; | |
418 | } | |
419 | } | |
420 | ||
3f3007af MS |
421 | /** |
422 | * ap_request_timeout(): Handling of request timeouts | |
cefbeb5d | 423 | * @t: timer making this callback |
3f3007af MS |
424 | * |
425 | * Handles request timeouts. | |
426 | */ | |
cefbeb5d | 427 | void ap_request_timeout(struct timer_list *t) |
3f3007af | 428 | { |
cefbeb5d | 429 | struct ap_queue *aq = from_timer(aq, t, timeout); |
3f3007af | 430 | |
e28d2af4 | 431 | spin_lock_bh(&aq->lock); |
dc4b6ded | 432 | ap_wait(ap_sm_event(aq, AP_SM_EVENT_TIMEOUT)); |
e28d2af4 | 433 | spin_unlock_bh(&aq->lock); |
3f3007af MS |
434 | } |
435 | ||
436 | /** | |
437 | * ap_poll_timeout(): AP receive polling for finished AP requests. | |
438 | * @unused: Unused pointer. | |
439 | * | |
440 | * Schedules the AP tasklet using a high resolution timer. | |
441 | */ | |
442 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) | |
443 | { | |
41677b1d | 444 | tasklet_schedule(&ap_tasklet); |
3f3007af MS |
445 | return HRTIMER_NORESTART; |
446 | } | |
447 | ||
448 | /** | |
449 | * ap_interrupt_handler() - Schedule ap_tasklet on interrupt | |
450 | * @airq: pointer to adapter interrupt descriptor | |
451 | */ | |
30e63ef2 | 452 | static void ap_interrupt_handler(struct airq_struct *airq, bool floating) |
3f3007af MS |
453 | { |
454 | inc_irq_stat(IRQIO_APB); | |
41677b1d | 455 | tasklet_schedule(&ap_tasklet); |
3f3007af MS |
456 | } |
457 | ||
458 | /** | |
459 | * ap_tasklet_fn(): Tasklet to poll all AP devices. | |
460 | * @dummy: Unused variable | |
461 | * | |
462 | * Poll all AP devices on the bus. | |
463 | */ | |
464 | static void ap_tasklet_fn(unsigned long dummy) | |
465 | { | |
bc4b295e | 466 | int bkt; |
e28d2af4 | 467 | struct ap_queue *aq; |
dc4b6ded | 468 | enum ap_sm_wait wait = AP_SM_WAIT_NONE; |
3f3007af MS |
469 | |
470 | /* Reset the indicator if interrupts are used. Thus new interrupts can | |
471 | * be received. Doing it in the beginning of the tasklet is therefor | |
472 | * important that no requests on any AP get lost. | |
473 | */ | |
474 | if (ap_using_interrupts()) | |
475 | xchg(ap_airq.lsi_ptr, 0); | |
476 | ||
bc4b295e HF |
477 | spin_lock_bh(&ap_queues_lock); |
478 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
479 | spin_lock_bh(&aq->lock); | |
dc4b6ded | 480 | wait = min(wait, ap_sm_event_loop(aq, AP_SM_EVENT_POLL)); |
bc4b295e | 481 | spin_unlock_bh(&aq->lock); |
3f3007af | 482 | } |
bc4b295e | 483 | spin_unlock_bh(&ap_queues_lock); |
e28d2af4 IT |
484 | |
485 | ap_wait(wait); | |
af512ed0 RW |
486 | } |
487 | ||
9af3e04e MS |
488 | static int ap_pending_requests(void) |
489 | { | |
bc4b295e | 490 | int bkt; |
e28d2af4 IT |
491 | struct ap_queue *aq; |
492 | ||
bc4b295e HF |
493 | spin_lock_bh(&ap_queues_lock); |
494 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
495 | if (aq->queue_count == 0) | |
496 | continue; | |
497 | spin_unlock_bh(&ap_queues_lock); | |
498 | return 1; | |
9af3e04e | 499 | } |
bc4b295e | 500 | spin_unlock_bh(&ap_queues_lock); |
e28d2af4 | 501 | return 0; |
9af3e04e MS |
502 | } |
503 | ||
83e9d5d2 MS |
504 | /** |
505 | * ap_poll_thread(): Thread that polls for finished requests. | |
506 | * @data: Unused pointer | |
507 | * | |
508 | * AP bus poll thread. The purpose of this thread is to poll for | |
509 | * finished requests in a loop if there is a "free" cpu - that is | |
510 | * a cpu that doesn't have anything better to do. The polling stops | |
511 | * as soon as there is another task or if all messages have been | |
512 | * delivered. | |
513 | */ | |
514 | static int ap_poll_thread(void *data) | |
515 | { | |
516 | DECLARE_WAITQUEUE(wait, current); | |
83e9d5d2 MS |
517 | |
518 | set_user_nice(current, MAX_NICE); | |
519 | set_freezable(); | |
520 | while (!kthread_should_stop()) { | |
521 | add_wait_queue(&ap_poll_wait, &wait); | |
522 | set_current_state(TASK_INTERRUPTIBLE); | |
41677b1d | 523 | if (!ap_pending_requests()) { |
83e9d5d2 MS |
524 | schedule(); |
525 | try_to_freeze(); | |
526 | } | |
527 | set_current_state(TASK_RUNNING); | |
528 | remove_wait_queue(&ap_poll_wait, &wait); | |
83e9d5d2 MS |
529 | if (need_resched()) { |
530 | schedule(); | |
531 | try_to_freeze(); | |
532 | continue; | |
533 | } | |
3f3007af | 534 | ap_tasklet_fn(0); |
9af3e04e MS |
535 | } |
536 | ||
83e9d5d2 MS |
537 | return 0; |
538 | } | |
539 | ||
540 | static int ap_poll_thread_start(void) | |
541 | { | |
542 | int rc; | |
543 | ||
544 | if (ap_using_interrupts() || ap_poll_kthread) | |
545 | return 0; | |
546 | mutex_lock(&ap_poll_thread_mutex); | |
547 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
9c705206 | 548 | rc = PTR_ERR_OR_ZERO(ap_poll_kthread); |
83e9d5d2 MS |
549 | if (rc) |
550 | ap_poll_kthread = NULL; | |
551 | mutex_unlock(&ap_poll_thread_mutex); | |
552 | return rc; | |
553 | } | |
554 | ||
555 | static void ap_poll_thread_stop(void) | |
556 | { | |
557 | if (!ap_poll_kthread) | |
558 | return; | |
559 | mutex_lock(&ap_poll_thread_mutex); | |
560 | kthread_stop(ap_poll_kthread); | |
561 | ap_poll_kthread = NULL; | |
562 | mutex_unlock(&ap_poll_thread_mutex); | |
563 | } | |
564 | ||
e28d2af4 IT |
565 | #define is_card_dev(x) ((x)->parent == ap_root_device) |
566 | #define is_queue_dev(x) ((x)->parent != ap_root_device) | |
1534c382 MS |
567 | |
568 | /** | |
1749a81d FB |
569 | * ap_bus_match() |
570 | * @dev: Pointer to device | |
571 | * @drv: Pointer to device_driver | |
572 | * | |
1534c382 MS |
573 | * AP bus driver registration/unregistration. |
574 | */ | |
575 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
576 | { | |
1534c382 MS |
577 | struct ap_driver *ap_drv = to_ap_drv(drv); |
578 | struct ap_device_id *id; | |
579 | ||
1749a81d | 580 | /* |
1534c382 MS |
581 | * Compare device type of the device with the list of |
582 | * supported types of the device_driver. | |
583 | */ | |
584 | for (id = ap_drv->ids; id->match_flags; id++) { | |
e28d2af4 IT |
585 | if (is_card_dev(dev) && |
586 | id->match_flags & AP_DEVICE_ID_MATCH_CARD_TYPE && | |
587 | id->dev_type == to_ap_dev(dev)->device_type) | |
588 | return 1; | |
589 | if (is_queue_dev(dev) && | |
590 | id->match_flags & AP_DEVICE_ID_MATCH_QUEUE_TYPE && | |
591 | id->dev_type == to_ap_dev(dev)->device_type) | |
592 | return 1; | |
1534c382 MS |
593 | } |
594 | return 0; | |
595 | } | |
596 | ||
597 | /** | |
1749a81d FB |
598 | * ap_uevent(): Uevent function for AP devices. |
599 | * @dev: Pointer to device | |
600 | * @env: Pointer to kobj_uevent_env | |
601 | * | |
602 | * It sets up a single environment variable DEV_TYPE which contains the | |
603 | * hardware device type. | |
1534c382 | 604 | */ |
ac2b96f3 | 605 | static int ap_uevent(struct device *dev, struct kobj_uevent_env *env) |
1534c382 | 606 | { |
df6f508c | 607 | int rc = 0; |
1534c382 | 608 | struct ap_device *ap_dev = to_ap_dev(dev); |
1534c382 | 609 | |
837cd105 HF |
610 | /* Uevents from ap bus core don't need extensions to the env */ |
611 | if (dev == ap_root_device) | |
612 | return 0; | |
1534c382 | 613 | |
df6f508c HF |
614 | if (is_card_dev(dev)) { |
615 | struct ap_card *ac = to_ap_card(&ap_dev->device); | |
bf62456e | 616 | |
df6f508c HF |
617 | /* Set up DEV_TYPE environment variable. */ |
618 | rc = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); | |
619 | if (rc) | |
620 | return rc; | |
621 | /* Add MODALIAS= */ | |
622 | rc = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); | |
623 | if (rc) | |
624 | return rc; | |
625 | ||
626 | /* Add MODE=<accel|cca|ep11> */ | |
627 | if (ap_test_bit(&ac->functions, AP_FUNC_ACCEL)) | |
628 | rc = add_uevent_var(env, "MODE=accel"); | |
629 | else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) | |
630 | rc = add_uevent_var(env, "MODE=cca"); | |
631 | else if (ap_test_bit(&ac->functions, AP_FUNC_EP11)) | |
632 | rc = add_uevent_var(env, "MODE=ep11"); | |
633 | if (rc) | |
634 | return rc; | |
635 | } else { | |
636 | struct ap_queue *aq = to_ap_queue(&ap_dev->device); | |
637 | ||
638 | /* Add MODE=<accel|cca|ep11> */ | |
639 | if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL)) | |
640 | rc = add_uevent_var(env, "MODE=accel"); | |
641 | else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) | |
642 | rc = add_uevent_var(env, "MODE=cca"); | |
643 | else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11)) | |
644 | rc = add_uevent_var(env, "MODE=ep11"); | |
645 | if (rc) | |
646 | return rc; | |
647 | } | |
837cd105 HF |
648 | |
649 | return 0; | |
650 | } | |
651 | ||
652 | static void ap_send_init_scan_done_uevent(void) | |
653 | { | |
654 | char *envp[] = { "INITSCAN=done", NULL }; | |
655 | ||
656 | kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); | |
657 | } | |
658 | ||
659 | static void ap_send_bindings_complete_uevent(void) | |
660 | { | |
0677519a HF |
661 | char buf[32]; |
662 | char *envp[] = { "BINDINGS=complete", buf, NULL }; | |
837cd105 | 663 | |
0677519a HF |
664 | snprintf(buf, sizeof(buf), "COMPLETECOUNT=%llu", |
665 | atomic64_inc_return(&ap_bindings_complete_count)); | |
837cd105 HF |
666 | kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); |
667 | } | |
668 | ||
df6f508c HF |
669 | void ap_send_config_uevent(struct ap_device *ap_dev, bool cfg) |
670 | { | |
671 | char buf[16]; | |
672 | char *envp[] = { buf, NULL }; | |
673 | ||
674 | snprintf(buf, sizeof(buf), "CONFIG=%d", cfg ? 1 : 0); | |
675 | ||
676 | kobject_uevent_env(&ap_dev->device.kobj, KOBJ_CHANGE, envp); | |
677 | } | |
678 | EXPORT_SYMBOL(ap_send_config_uevent); | |
679 | ||
680 | void ap_send_online_uevent(struct ap_device *ap_dev, int online) | |
681 | { | |
682 | char buf[16]; | |
683 | char *envp[] = { buf, NULL }; | |
684 | ||
685 | snprintf(buf, sizeof(buf), "ONLINE=%d", online ? 1 : 0); | |
686 | ||
687 | kobject_uevent_env(&ap_dev->device.kobj, KOBJ_CHANGE, envp); | |
688 | } | |
689 | EXPORT_SYMBOL(ap_send_online_uevent); | |
690 | ||
837cd105 HF |
691 | /* |
692 | * calc # of bound APQNs | |
693 | */ | |
694 | ||
695 | struct __ap_calc_ctrs { | |
696 | unsigned int apqns; | |
697 | unsigned int bound; | |
698 | }; | |
699 | ||
700 | static int __ap_calc_helper(struct device *dev, void *arg) | |
701 | { | |
702 | struct __ap_calc_ctrs *pctrs = (struct __ap_calc_ctrs *) arg; | |
703 | ||
704 | if (is_queue_dev(dev)) { | |
705 | pctrs->apqns++; | |
706 | if ((to_ap_dev(dev))->drv) | |
707 | pctrs->bound++; | |
708 | } | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | static void ap_calc_bound_apqns(unsigned int *apqns, unsigned int *bound) | |
714 | { | |
715 | struct __ap_calc_ctrs ctrs; | |
716 | ||
717 | memset(&ctrs, 0, sizeof(ctrs)); | |
718 | bus_for_each_dev(&ap_bus_type, NULL, (void *) &ctrs, __ap_calc_helper); | |
bf62456e | 719 | |
837cd105 HF |
720 | *apqns = ctrs.apqns; |
721 | *bound = ctrs.bound; | |
1534c382 MS |
722 | } |
723 | ||
837cd105 HF |
724 | /* |
725 | * After initial ap bus scan do check if all existing APQNs are | |
726 | * bound to device drivers. | |
727 | */ | |
728 | static void ap_check_bindings_complete(void) | |
729 | { | |
730 | unsigned int apqns, bound; | |
731 | ||
732 | if (atomic64_read(&ap_scan_bus_count) >= 1) { | |
733 | ap_calc_bound_apqns(&apqns, &bound); | |
734 | if (bound == apqns) { | |
735 | if (!completion_done(&ap_init_apqn_bindings_complete)) { | |
736 | complete_all(&ap_init_apqn_bindings_complete); | |
737 | AP_DBF(DBF_INFO, "%s complete\n", __func__); | |
738 | } | |
739 | ap_send_bindings_complete_uevent(); | |
740 | } | |
741 | } | |
742 | } | |
743 | ||
744 | /* | |
745 | * Interface to wait for the AP bus to have done one initial ap bus | |
746 | * scan and all detected APQNs have been bound to device drivers. | |
747 | * If these both conditions are not fulfilled, this function blocks | |
748 | * on a condition with wait_for_completion_interruptible_timeout(). | |
749 | * If these both conditions are fulfilled (before the timeout hits) | |
750 | * the return value is 0. If the timeout (in jiffies) hits instead | |
751 | * -ETIME is returned. On failures negative return values are | |
752 | * returned to the caller. | |
753 | */ | |
754 | int ap_wait_init_apqn_bindings_complete(unsigned long timeout) | |
755 | { | |
756 | long l; | |
757 | ||
758 | if (completion_done(&ap_init_apqn_bindings_complete)) | |
759 | return 0; | |
760 | ||
761 | if (timeout) | |
762 | l = wait_for_completion_interruptible_timeout( | |
763 | &ap_init_apqn_bindings_complete, timeout); | |
764 | else | |
765 | l = wait_for_completion_interruptible( | |
766 | &ap_init_apqn_bindings_complete); | |
767 | if (l < 0) | |
768 | return l == -ERESTARTSYS ? -EINTR : l; | |
769 | else if (l == 0 && timeout) | |
770 | return -ETIME; | |
771 | ||
772 | return 0; | |
773 | } | |
774 | EXPORT_SYMBOL(ap_wait_init_apqn_bindings_complete); | |
775 | ||
e28d2af4 | 776 | static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data) |
83e9d5d2 | 777 | { |
e28d2af4 IT |
778 | if (is_queue_dev(dev) && |
779 | AP_QID_CARD(to_ap_queue(dev)->qid) == (int)(long) data) | |
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); | |
792 | devres = test_bit_inv(card, ap_perms.apm) | |
793 | && test_bit_inv(queue, ap_perms.aqm); | |
794 | mutex_unlock(&ap_perms_mutex); | |
795 | drvres = to_ap_drv(dev->driver)->flags | |
796 | & AP_DRIVER_FLAG_DEFAULT; | |
797 | if (!!devres != !!drvres) { | |
2ea2a609 HF |
798 | AP_DBF_DBG("reprobing queue=%02x.%04x\n", |
799 | card, queue); | |
7e0bdbe5 HF |
800 | rc = device_reprobe(dev); |
801 | } | |
802 | } | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | static void ap_bus_revise_bindings(void) | |
808 | { | |
809 | bus_for_each_dev(&ap_bus_type, NULL, NULL, __ap_revise_reserved); | |
810 | } | |
811 | ||
812 | int ap_owned_by_def_drv(int card, int queue) | |
813 | { | |
814 | int rc = 0; | |
815 | ||
816 | if (card < 0 || card >= AP_DEVICES || queue < 0 || queue >= AP_DOMAINS) | |
817 | return -EINVAL; | |
818 | ||
819 | mutex_lock(&ap_perms_mutex); | |
820 | ||
821 | if (test_bit_inv(card, ap_perms.apm) | |
822 | && test_bit_inv(queue, ap_perms.aqm)) | |
823 | rc = 1; | |
824 | ||
825 | mutex_unlock(&ap_perms_mutex); | |
826 | ||
827 | return rc; | |
828 | } | |
829 | EXPORT_SYMBOL(ap_owned_by_def_drv); | |
830 | ||
831 | int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm, | |
832 | unsigned long *aqm) | |
833 | { | |
834 | int card, queue, rc = 0; | |
835 | ||
836 | mutex_lock(&ap_perms_mutex); | |
837 | ||
838 | for (card = 0; !rc && card < AP_DEVICES; card++) | |
839 | if (test_bit_inv(card, apm) && | |
840 | test_bit_inv(card, ap_perms.apm)) | |
841 | for (queue = 0; !rc && queue < AP_DOMAINS; queue++) | |
842 | if (test_bit_inv(queue, aqm) && | |
843 | test_bit_inv(queue, ap_perms.aqm)) | |
844 | rc = 1; | |
845 | ||
846 | mutex_unlock(&ap_perms_mutex); | |
847 | ||
848 | return rc; | |
849 | } | |
850 | EXPORT_SYMBOL(ap_apqn_in_matrix_owned_by_def_drv); | |
851 | ||
1534c382 MS |
852 | static int ap_device_probe(struct device *dev) |
853 | { | |
854 | struct ap_device *ap_dev = to_ap_dev(dev); | |
3f3007af | 855 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
29c2680f HF |
856 | int card, queue, devres, drvres, rc = -ENODEV; |
857 | ||
858 | if (!get_device(dev)) | |
859 | return rc; | |
7e0bdbe5 HF |
860 | |
861 | if (is_queue_dev(dev)) { | |
862 | /* | |
863 | * If the apqn is marked as reserved/used by ap bus and | |
864 | * default drivers, only probe with drivers with the default | |
865 | * flag set. If it is not marked, only probe with drivers | |
866 | * with the default flag not set. | |
867 | */ | |
868 | card = AP_QID_CARD(to_ap_queue(dev)->qid); | |
869 | queue = AP_QID_QUEUE(to_ap_queue(dev)->qid); | |
870 | mutex_lock(&ap_perms_mutex); | |
871 | devres = test_bit_inv(card, ap_perms.apm) | |
872 | && test_bit_inv(queue, ap_perms.aqm); | |
873 | mutex_unlock(&ap_perms_mutex); | |
874 | drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT; | |
875 | if (!!devres != !!drvres) | |
29c2680f | 876 | goto out; |
7e0bdbe5 | 877 | } |
666e68e0 | 878 | |
e3850508 | 879 | /* Add queue/card to list of active queues/cards */ |
bc4b295e HF |
880 | spin_lock_bh(&ap_queues_lock); |
881 | if (is_queue_dev(dev)) | |
882 | hash_add(ap_queues, &to_ap_queue(dev)->hnode, | |
883 | to_ap_queue(dev)->qid); | |
884 | spin_unlock_bh(&ap_queues_lock); | |
e3850508 | 885 | |
3f3007af | 886 | ap_dev->drv = ap_drv; |
1534c382 | 887 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
e3850508 HF |
888 | |
889 | if (rc) { | |
bc4b295e HF |
890 | spin_lock_bh(&ap_queues_lock); |
891 | if (is_queue_dev(dev)) | |
892 | hash_del(&to_ap_queue(dev)->hnode); | |
893 | spin_unlock_bh(&ap_queues_lock); | |
3f3007af | 894 | ap_dev->drv = NULL; |
837cd105 HF |
895 | } else |
896 | ap_check_bindings_complete(); | |
e3850508 | 897 | |
29c2680f HF |
898 | out: |
899 | if (rc) | |
900 | put_device(dev); | |
1534c382 MS |
901 | return rc; |
902 | } | |
903 | ||
fc7a6209 | 904 | static void ap_device_remove(struct device *dev) |
1534c382 MS |
905 | { |
906 | struct ap_device *ap_dev = to_ap_dev(dev); | |
907 | struct ap_driver *ap_drv = ap_dev->drv; | |
908 | ||
01396a37 | 909 | /* prepare ap queue device removal */ |
104f708f | 910 | if (is_queue_dev(dev)) |
01396a37 HF |
911 | ap_queue_prepare_remove(to_ap_queue(dev)); |
912 | ||
913 | /* driver's chance to clean up gracefully */ | |
e3850508 HF |
914 | if (ap_drv->remove) |
915 | ap_drv->remove(ap_dev); | |
916 | ||
01396a37 HF |
917 | /* now do the ap queue device remove */ |
918 | if (is_queue_dev(dev)) | |
919 | ap_queue_remove(to_ap_queue(dev)); | |
920 | ||
e3850508 | 921 | /* Remove queue/card from list of active queues/cards */ |
bc4b295e HF |
922 | spin_lock_bh(&ap_queues_lock); |
923 | if (is_queue_dev(dev)) | |
924 | hash_del(&to_ap_queue(dev)->hnode); | |
925 | spin_unlock_bh(&ap_queues_lock); | |
837cd105 | 926 | ap_dev->drv = NULL; |
e3850508 | 927 | |
29c2680f | 928 | put_device(dev); |
1534c382 MS |
929 | } |
930 | ||
bc4b295e HF |
931 | struct ap_queue *ap_get_qdev(ap_qid_t qid) |
932 | { | |
933 | int bkt; | |
934 | struct ap_queue *aq; | |
935 | ||
936 | spin_lock_bh(&ap_queues_lock); | |
937 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
938 | if (aq->qid == qid) { | |
939 | get_device(&aq->ap_dev.device); | |
940 | spin_unlock_bh(&ap_queues_lock); | |
941 | return aq; | |
942 | } | |
943 | } | |
944 | spin_unlock_bh(&ap_queues_lock); | |
945 | ||
946 | return NULL; | |
947 | } | |
948 | EXPORT_SYMBOL(ap_get_qdev); | |
949 | ||
1534c382 MS |
950 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, |
951 | char *name) | |
952 | { | |
953 | struct device_driver *drv = &ap_drv->driver; | |
954 | ||
955 | drv->bus = &ap_bus_type; | |
1534c382 MS |
956 | drv->owner = owner; |
957 | drv->name = name; | |
958 | return driver_register(drv); | |
959 | } | |
960 | EXPORT_SYMBOL(ap_driver_register); | |
961 | ||
962 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
963 | { | |
964 | driver_unregister(&ap_drv->driver); | |
965 | } | |
966 | EXPORT_SYMBOL(ap_driver_unregister); | |
967 | ||
dabecb29 HD |
968 | void ap_bus_force_rescan(void) |
969 | { | |
56bbe686 | 970 | /* processing a asynchronous bus rescan */ |
fcd0d1f6 | 971 | del_timer(&ap_config_timer); |
8139b89d MS |
972 | queue_work(system_long_wq, &ap_scan_work); |
973 | flush_work(&ap_scan_work); | |
dabecb29 HD |
974 | } |
975 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
976 | ||
0d9c038f TK |
977 | /* |
978 | * A config change has happened, force an ap bus rescan. | |
979 | */ | |
980 | void ap_bus_cfg_chg(void) | |
981 | { | |
2ea2a609 | 982 | AP_DBF_DBG("%s config change, forcing bus rescan\n", __func__); |
0d9c038f TK |
983 | |
984 | ap_bus_force_rescan(); | |
985 | } | |
986 | ||
1749a81d | 987 | /* |
3d8f60d3 HF |
988 | * hex2bitmap() - parse hex mask string and set bitmap. |
989 | * Valid strings are "0x012345678" with at least one valid hex number. | |
990 | * Rest of the bitmap to the right is padded with 0. No spaces allowed | |
991 | * within the string, the leading 0x may be omitted. | |
992 | * Returns the bitmask with exactly the bits set as given by the hex | |
993 | * string (both in big endian order). | |
1534c382 | 994 | */ |
7e0bdbe5 HF |
995 | static int hex2bitmap(const char *str, unsigned long *bitmap, int bits) |
996 | { | |
997 | int i, n, b; | |
998 | ||
999 | /* bits needs to be a multiple of 8 */ | |
1000 | if (bits & 0x07) | |
1001 | return -EINVAL; | |
1002 | ||
7e0bdbe5 HF |
1003 | if (str[0] == '0' && str[1] == 'x') |
1004 | str++; | |
1005 | if (*str == 'x') | |
1006 | str++; | |
1007 | ||
1008 | for (i = 0; isxdigit(*str) && i < bits; str++) { | |
1009 | b = hex_to_bin(*str); | |
1010 | for (n = 0; n < 4; n++) | |
1011 | if (b & (0x08 >> n)) | |
1012 | set_bit_inv(i + n, bitmap); | |
1013 | i += 4; | |
1014 | } | |
1015 | ||
3d8f60d3 HF |
1016 | if (*str == '\n') |
1017 | str++; | |
1018 | if (*str) | |
1019 | return -EINVAL; | |
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | /* | |
fa108f95 MS |
1024 | * modify_bitmap() - parse bitmask argument and modify an existing |
1025 | * bit mask accordingly. A concatenation (done with ',') of these | |
1026 | * terms is recognized: | |
3d8f60d3 HF |
1027 | * +<bitnr>[-<bitnr>] or -<bitnr>[-<bitnr>] |
1028 | * <bitnr> may be any valid number (hex, decimal or octal) in the range | |
1029 | * 0...bits-1; the leading + or - is required. Here are some examples: | |
1030 | * +0-15,+32,-128,-0xFF | |
1031 | * -0-255,+1-16,+0x128 | |
1032 | * +1,+2,+3,+4,-5,-7-10 | |
fa108f95 MS |
1033 | * Returns the new bitmap after all changes have been applied. Every |
1034 | * positive value in the string will set a bit and every negative value | |
1035 | * in the string will clear a bit. As a bit may be touched more than once, | |
1036 | * the last 'operation' wins: | |
1037 | * +0-255,-128 = first bits 0-255 will be set, then bit 128 will be | |
1038 | * cleared again. All other bits are unmodified. | |
3d8f60d3 | 1039 | */ |
fa108f95 | 1040 | static int modify_bitmap(const char *str, unsigned long *bitmap, int bits) |
3d8f60d3 HF |
1041 | { |
1042 | int a, i, z; | |
1043 | char *np, sign; | |
1044 | ||
1045 | /* bits needs to be a multiple of 8 */ | |
1046 | if (bits & 0x07) | |
7e0bdbe5 HF |
1047 | return -EINVAL; |
1048 | ||
3d8f60d3 HF |
1049 | while (*str) { |
1050 | sign = *str++; | |
1051 | if (sign != '+' && sign != '-') | |
1052 | return -EINVAL; | |
1053 | a = z = simple_strtoul(str, &np, 0); | |
1054 | if (str == np || a >= bits) | |
1055 | return -EINVAL; | |
1056 | str = np; | |
1057 | if (*str == '-') { | |
1058 | z = simple_strtoul(++str, &np, 0); | |
1059 | if (str == np || a > z || z >= bits) | |
1060 | return -EINVAL; | |
1061 | str = np; | |
1062 | } | |
1063 | for (i = a; i <= z; i++) | |
fa108f95 MS |
1064 | if (sign == '+') |
1065 | set_bit_inv(i, bitmap); | |
1066 | else | |
1067 | clear_bit_inv(i, bitmap); | |
3d8f60d3 HF |
1068 | while (*str == ',' || *str == '\n') |
1069 | str++; | |
1070 | } | |
1071 | ||
7e0bdbe5 HF |
1072 | return 0; |
1073 | } | |
1074 | ||
00fab235 HF |
1075 | int ap_parse_mask_str(const char *str, |
1076 | unsigned long *bitmap, int bits, | |
1077 | struct mutex *lock) | |
3d8f60d3 | 1078 | { |
fa108f95 MS |
1079 | unsigned long *newmap, size; |
1080 | int rc; | |
3d8f60d3 HF |
1081 | |
1082 | /* bits needs to be a multiple of 8 */ | |
1083 | if (bits & 0x07) | |
1084 | return -EINVAL; | |
1085 | ||
fa108f95 MS |
1086 | size = BITS_TO_LONGS(bits)*sizeof(unsigned long); |
1087 | newmap = kmalloc(size, GFP_KERNEL); | |
1088 | if (!newmap) | |
1089 | return -ENOMEM; | |
1090 | if (mutex_lock_interruptible(lock)) { | |
1091 | kfree(newmap); | |
1092 | return -ERESTARTSYS; | |
1093 | } | |
1094 | ||
3d8f60d3 | 1095 | if (*str == '+' || *str == '-') { |
fa108f95 MS |
1096 | memcpy(newmap, bitmap, size); |
1097 | rc = modify_bitmap(str, newmap, bits); | |
3d8f60d3 | 1098 | } else { |
fa108f95 MS |
1099 | memset(newmap, 0, size); |
1100 | rc = hex2bitmap(str, newmap, bits); | |
3d8f60d3 | 1101 | } |
fa108f95 MS |
1102 | if (rc == 0) |
1103 | memcpy(bitmap, newmap, size); | |
3d8f60d3 | 1104 | mutex_unlock(lock); |
fa108f95 MS |
1105 | kfree(newmap); |
1106 | return rc; | |
3d8f60d3 | 1107 | } |
00fab235 | 1108 | EXPORT_SYMBOL(ap_parse_mask_str); |
3d8f60d3 HF |
1109 | |
1110 | /* | |
1111 | * AP bus attributes. | |
1112 | */ | |
1113 | ||
1534c382 MS |
1114 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) |
1115 | { | |
40501c70 | 1116 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); |
1534c382 MS |
1117 | } |
1118 | ||
fc1d3f02 IT |
1119 | static ssize_t ap_domain_store(struct bus_type *bus, |
1120 | const char *buf, size_t count) | |
1121 | { | |
1122 | int domain; | |
1123 | ||
1124 | if (sscanf(buf, "%i\n", &domain) != 1 || | |
7e0bdbe5 HF |
1125 | domain < 0 || domain > ap_max_domain_id || |
1126 | !test_bit_inv(domain, ap_perms.aqm)) | |
fc1d3f02 | 1127 | return -EINVAL; |
c8337c47 | 1128 | |
fc1d3f02 IT |
1129 | spin_lock_bh(&ap_domain_lock); |
1130 | ap_domain_index = domain; | |
1131 | spin_unlock_bh(&ap_domain_lock); | |
cccd85bf | 1132 | |
2ea2a609 | 1133 | AP_DBF_INFO("stored new default domain=%d\n", domain); |
cccd85bf | 1134 | |
fc1d3f02 IT |
1135 | return count; |
1136 | } | |
1137 | ||
ac2b96f3 | 1138 | static BUS_ATTR_RW(ap_domain); |
1534c382 | 1139 | |
91f3e3ea IT |
1140 | static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf) |
1141 | { | |
c8337c47 | 1142 | if (!ap_qci_info) /* QCI not supported */ |
40501c70 HF |
1143 | return scnprintf(buf, PAGE_SIZE, "not supported\n"); |
1144 | ||
1145 | return scnprintf(buf, PAGE_SIZE, | |
1146 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
c8337c47 HF |
1147 | ap_qci_info->adm[0], ap_qci_info->adm[1], |
1148 | ap_qci_info->adm[2], ap_qci_info->adm[3], | |
1149 | ap_qci_info->adm[4], ap_qci_info->adm[5], | |
1150 | ap_qci_info->adm[6], ap_qci_info->adm[7]); | |
91f3e3ea IT |
1151 | } |
1152 | ||
ac2b96f3 | 1153 | static BUS_ATTR_RO(ap_control_domain_mask); |
91f3e3ea | 1154 | |
e28d2af4 IT |
1155 | static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf) |
1156 | { | |
c8337c47 | 1157 | if (!ap_qci_info) /* QCI not supported */ |
40501c70 HF |
1158 | return scnprintf(buf, PAGE_SIZE, "not supported\n"); |
1159 | ||
1160 | return scnprintf(buf, PAGE_SIZE, | |
1161 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
c8337c47 HF |
1162 | ap_qci_info->aqm[0], ap_qci_info->aqm[1], |
1163 | ap_qci_info->aqm[2], ap_qci_info->aqm[3], | |
1164 | ap_qci_info->aqm[4], ap_qci_info->aqm[5], | |
1165 | ap_qci_info->aqm[6], ap_qci_info->aqm[7]); | |
e28d2af4 IT |
1166 | } |
1167 | ||
ac2b96f3 | 1168 | static BUS_ATTR_RO(ap_usage_domain_mask); |
1534c382 | 1169 | |
aa55bf5f HF |
1170 | static ssize_t ap_adapter_mask_show(struct bus_type *bus, char *buf) |
1171 | { | |
c8337c47 | 1172 | if (!ap_qci_info) /* QCI not supported */ |
40501c70 HF |
1173 | return scnprintf(buf, PAGE_SIZE, "not supported\n"); |
1174 | ||
1175 | return scnprintf(buf, PAGE_SIZE, | |
1176 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
c8337c47 HF |
1177 | ap_qci_info->apm[0], ap_qci_info->apm[1], |
1178 | ap_qci_info->apm[2], ap_qci_info->apm[3], | |
1179 | ap_qci_info->apm[4], ap_qci_info->apm[5], | |
1180 | ap_qci_info->apm[6], ap_qci_info->apm[7]); | |
aa55bf5f HF |
1181 | } |
1182 | ||
1183 | static BUS_ATTR_RO(ap_adapter_mask); | |
1184 | ||
cb17a636 FB |
1185 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
1186 | { | |
40501c70 HF |
1187 | return scnprintf(buf, PAGE_SIZE, "%d\n", |
1188 | ap_using_interrupts() ? 1 : 0); | |
cb17a636 FB |
1189 | } |
1190 | ||
ac2b96f3 HF |
1191 | static BUS_ATTR_RO(ap_interrupts); |
1192 | ||
1193 | static ssize_t config_time_show(struct bus_type *bus, char *buf) | |
1194 | { | |
40501c70 | 1195 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); |
ac2b96f3 | 1196 | } |
cb17a636 | 1197 | |
ac2b96f3 HF |
1198 | static ssize_t config_time_store(struct bus_type *bus, |
1199 | const char *buf, size_t count) | |
1534c382 MS |
1200 | { |
1201 | int time; | |
1202 | ||
1203 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1204 | return -EINVAL; | |
1205 | ap_config_time = time; | |
fcd0d1f6 | 1206 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); |
1534c382 MS |
1207 | return count; |
1208 | } | |
1209 | ||
ac2b96f3 | 1210 | static BUS_ATTR_RW(config_time); |
1534c382 | 1211 | |
ac2b96f3 | 1212 | static ssize_t poll_thread_show(struct bus_type *bus, char *buf) |
1534c382 | 1213 | { |
40501c70 | 1214 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); |
1534c382 MS |
1215 | } |
1216 | ||
ac2b96f3 HF |
1217 | static ssize_t poll_thread_store(struct bus_type *bus, |
1218 | const char *buf, size_t count) | |
1534c382 MS |
1219 | { |
1220 | int flag, rc; | |
1221 | ||
1222 | if (sscanf(buf, "%d\n", &flag) != 1) | |
1223 | return -EINVAL; | |
1224 | if (flag) { | |
1225 | rc = ap_poll_thread_start(); | |
1226 | if (rc) | |
83e9d5d2 MS |
1227 | count = rc; |
1228 | } else | |
1534c382 MS |
1229 | ap_poll_thread_stop(); |
1230 | return count; | |
1231 | } | |
1232 | ||
ac2b96f3 | 1233 | static BUS_ATTR_RW(poll_thread); |
1534c382 | 1234 | |
fe137230 FB |
1235 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
1236 | { | |
40501c70 | 1237 | return scnprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); |
fe137230 FB |
1238 | } |
1239 | ||
1240 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
1241 | size_t count) | |
1242 | { | |
1243 | unsigned long long time; | |
1244 | ktime_t hr_time; | |
1245 | ||
1246 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
1247 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
1248 | time > 120000000000ULL) | |
fe137230 FB |
1249 | return -EINVAL; |
1250 | poll_timeout = time; | |
8b0e1953 | 1251 | hr_time = poll_timeout; |
fe137230 | 1252 | |
8cc2af7c IT |
1253 | spin_lock_bh(&ap_poll_timer_lock); |
1254 | hrtimer_cancel(&ap_poll_timer); | |
1255 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1256 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
1257 | spin_unlock_bh(&ap_poll_timer_lock); | |
1258 | ||
fe137230 FB |
1259 | return count; |
1260 | } | |
1261 | ||
ac2b96f3 | 1262 | static BUS_ATTR_RW(poll_timeout); |
fe137230 | 1263 | |
5bc334bf IT |
1264 | static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf) |
1265 | { | |
c8337c47 | 1266 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_domain_id); |
5bc334bf IT |
1267 | } |
1268 | ||
ac2b96f3 | 1269 | static BUS_ATTR_RO(ap_max_domain_id); |
5bc334bf | 1270 | |
c8337c47 HF |
1271 | static ssize_t ap_max_adapter_id_show(struct bus_type *bus, char *buf) |
1272 | { | |
1273 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_adapter_id); | |
1274 | } | |
1275 | ||
1276 | static BUS_ATTR_RO(ap_max_adapter_id); | |
1277 | ||
7e0bdbe5 HF |
1278 | static ssize_t apmask_show(struct bus_type *bus, char *buf) |
1279 | { | |
1280 | int rc; | |
1281 | ||
1282 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1283 | return -ERESTARTSYS; | |
40501c70 HF |
1284 | rc = scnprintf(buf, PAGE_SIZE, |
1285 | "0x%016lx%016lx%016lx%016lx\n", | |
1286 | ap_perms.apm[0], ap_perms.apm[1], | |
1287 | ap_perms.apm[2], ap_perms.apm[3]); | |
7e0bdbe5 HF |
1288 | mutex_unlock(&ap_perms_mutex); |
1289 | ||
1290 | return rc; | |
1291 | } | |
1292 | ||
1293 | static ssize_t apmask_store(struct bus_type *bus, const char *buf, | |
1294 | size_t count) | |
1295 | { | |
3d8f60d3 | 1296 | int rc; |
7e0bdbe5 | 1297 | |
00fab235 | 1298 | rc = ap_parse_mask_str(buf, ap_perms.apm, AP_DEVICES, &ap_perms_mutex); |
3d8f60d3 HF |
1299 | if (rc) |
1300 | return rc; | |
7e0bdbe5 HF |
1301 | |
1302 | ap_bus_revise_bindings(); | |
1303 | ||
1304 | return count; | |
1305 | } | |
1306 | ||
1307 | static BUS_ATTR_RW(apmask); | |
1308 | ||
1309 | static ssize_t aqmask_show(struct bus_type *bus, char *buf) | |
1310 | { | |
1311 | int rc; | |
1312 | ||
1313 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1314 | return -ERESTARTSYS; | |
40501c70 HF |
1315 | rc = scnprintf(buf, PAGE_SIZE, |
1316 | "0x%016lx%016lx%016lx%016lx\n", | |
1317 | ap_perms.aqm[0], ap_perms.aqm[1], | |
1318 | ap_perms.aqm[2], ap_perms.aqm[3]); | |
7e0bdbe5 HF |
1319 | mutex_unlock(&ap_perms_mutex); |
1320 | ||
1321 | return rc; | |
1322 | } | |
1323 | ||
1324 | static ssize_t aqmask_store(struct bus_type *bus, const char *buf, | |
1325 | size_t count) | |
1326 | { | |
3d8f60d3 | 1327 | int rc; |
7e0bdbe5 | 1328 | |
00fab235 | 1329 | rc = ap_parse_mask_str(buf, ap_perms.aqm, AP_DOMAINS, &ap_perms_mutex); |
3d8f60d3 HF |
1330 | if (rc) |
1331 | return rc; | |
7e0bdbe5 HF |
1332 | |
1333 | ap_bus_revise_bindings(); | |
1334 | ||
1335 | return count; | |
1336 | } | |
1337 | ||
1338 | static BUS_ATTR_RW(aqmask); | |
1339 | ||
837cd105 HF |
1340 | static ssize_t scans_show(struct bus_type *bus, char *buf) |
1341 | { | |
1342 | return scnprintf(buf, PAGE_SIZE, "%llu\n", | |
1343 | atomic64_read(&ap_scan_bus_count)); | |
1344 | } | |
1345 | ||
1346 | static BUS_ATTR_RO(scans); | |
1347 | ||
1348 | static ssize_t bindings_show(struct bus_type *bus, char *buf) | |
1349 | { | |
1350 | int rc; | |
1351 | unsigned int apqns, n; | |
1352 | ||
1353 | ap_calc_bound_apqns(&apqns, &n); | |
1354 | if (atomic64_read(&ap_scan_bus_count) >= 1 && n == apqns) | |
1355 | rc = scnprintf(buf, PAGE_SIZE, "%u/%u (complete)\n", n, apqns); | |
1356 | else | |
1357 | rc = scnprintf(buf, PAGE_SIZE, "%u/%u\n", n, apqns); | |
1358 | ||
1359 | return rc; | |
1360 | } | |
1361 | ||
1362 | static BUS_ATTR_RO(bindings); | |
1363 | ||
8cb4c20f JW |
1364 | static struct attribute *ap_bus_attrs[] = { |
1365 | &bus_attr_ap_domain.attr, | |
1366 | &bus_attr_ap_control_domain_mask.attr, | |
1367 | &bus_attr_ap_usage_domain_mask.attr, | |
1368 | &bus_attr_ap_adapter_mask.attr, | |
1369 | &bus_attr_config_time.attr, | |
1370 | &bus_attr_poll_thread.attr, | |
1371 | &bus_attr_ap_interrupts.attr, | |
1372 | &bus_attr_poll_timeout.attr, | |
1373 | &bus_attr_ap_max_domain_id.attr, | |
1374 | &bus_attr_ap_max_adapter_id.attr, | |
1375 | &bus_attr_apmask.attr, | |
1376 | &bus_attr_aqmask.attr, | |
1377 | &bus_attr_scans.attr, | |
1378 | &bus_attr_bindings.attr, | |
fe137230 | 1379 | NULL, |
1534c382 | 1380 | }; |
8cb4c20f JW |
1381 | ATTRIBUTE_GROUPS(ap_bus); |
1382 | ||
1383 | static struct bus_type ap_bus_type = { | |
1384 | .name = "ap", | |
1385 | .bus_groups = ap_bus_groups, | |
1386 | .match = &ap_bus_match, | |
1387 | .uevent = &ap_uevent, | |
95c09f03 JW |
1388 | .probe = ap_device_probe, |
1389 | .remove = ap_device_remove, | |
8cb4c20f | 1390 | }; |
1534c382 MS |
1391 | |
1392 | /** | |
1c472d46 HP |
1393 | * ap_select_domain(): Select an AP domain if possible and we haven't |
1394 | * already done so before. | |
1534c382 | 1395 | */ |
1c472d46 | 1396 | static void ap_select_domain(void) |
1534c382 | 1397 | { |
6acbe21f | 1398 | struct ap_queue_status status; |
c8337c47 | 1399 | int card, dom; |
1534c382 | 1400 | |
1749a81d | 1401 | /* |
c8337c47 HF |
1402 | * Choose the default domain. Either the one specified with |
1403 | * the "domain=" parameter or the first domain with at least | |
1404 | * one valid APQN. | |
1534c382 | 1405 | */ |
fc1d3f02 IT |
1406 | spin_lock_bh(&ap_domain_lock); |
1407 | if (ap_domain_index >= 0) { | |
1534c382 | 1408 | /* Domain has already been selected. */ |
c8337c47 | 1409 | goto out; |
fc1d3f02 | 1410 | } |
c8337c47 HF |
1411 | for (dom = 0; dom <= ap_max_domain_id; dom++) { |
1412 | if (!ap_test_config_usage_domain(dom) || | |
1413 | !test_bit_inv(dom, ap_perms.aqm)) | |
75014550 | 1414 | continue; |
c8337c47 HF |
1415 | for (card = 0; card <= ap_max_adapter_id; card++) { |
1416 | if (!ap_test_config_card_id(card) || | |
1417 | !test_bit_inv(card, ap_perms.apm)) | |
75014550 | 1418 | continue; |
c8337c47 | 1419 | status = ap_test_queue(AP_MKQID(card, dom), |
e7fc5146 TK |
1420 | ap_apft_available(), |
1421 | NULL); | |
c8337c47 HF |
1422 | if (status.response_code == AP_RESPONSE_NORMAL) |
1423 | break; | |
1534c382 | 1424 | } |
c8337c47 HF |
1425 | if (card <= ap_max_adapter_id) |
1426 | break; | |
1534c382 | 1427 | } |
c8337c47 HF |
1428 | if (dom <= ap_max_domain_id) { |
1429 | ap_domain_index = dom; | |
2ea2a609 HF |
1430 | AP_DBF_INFO("%s new default domain is %d\n", |
1431 | __func__, ap_domain_index); | |
1534c382 | 1432 | } |
c8337c47 | 1433 | out: |
fc1d3f02 | 1434 | spin_unlock_bh(&ap_domain_lock); |
1534c382 MS |
1435 | } |
1436 | ||
9a564108 HF |
1437 | /* |
1438 | * This function checks the type and returns either 0 for not | |
1439 | * supported or the highest compatible type value (which may | |
1440 | * include the input type value). | |
1441 | */ | |
1442 | static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func) | |
1443 | { | |
1444 | int comp_type = 0; | |
1445 | ||
1446 | /* < CEX2A is not supported */ | |
2ea2a609 HF |
1447 | if (rawtype < AP_DEVICE_TYPE_CEX2A) { |
1448 | AP_DBF_WARN("get_comp_type queue=%02x.%04x unsupported type %d\n", | |
1449 | AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype); | |
9a564108 | 1450 | return 0; |
2ea2a609 | 1451 | } |
cf2957f3 HF |
1452 | /* up to CEX7 known and fully supported */ |
1453 | if (rawtype <= AP_DEVICE_TYPE_CEX7) | |
9a564108 HF |
1454 | return rawtype; |
1455 | /* | |
cf2957f3 | 1456 | * unknown new type > CEX7, check for compatibility |
9a564108 | 1457 | * to the highest known and supported type which is |
cf2957f3 | 1458 | * currently CEX7 with the help of the QACT function. |
9a564108 HF |
1459 | */ |
1460 | if (ap_qact_available()) { | |
1461 | struct ap_queue_status status; | |
56c5c683 | 1462 | union ap_qact_ap_info apinfo = {0}; |
9a564108 HF |
1463 | |
1464 | apinfo.mode = (func >> 26) & 0x07; | |
cf2957f3 | 1465 | apinfo.cat = AP_DEVICE_TYPE_CEX7; |
9a564108 HF |
1466 | status = ap_qact(qid, 0, &apinfo); |
1467 | if (status.response_code == AP_RESPONSE_NORMAL | |
1468 | && apinfo.cat >= AP_DEVICE_TYPE_CEX2A | |
cf2957f3 | 1469 | && apinfo.cat <= AP_DEVICE_TYPE_CEX7) |
9a564108 HF |
1470 | comp_type = apinfo.cat; |
1471 | } | |
1472 | if (!comp_type) | |
2ea2a609 HF |
1473 | AP_DBF_WARN("get_comp_type queue=%02x.%04x unable to map type %d\n", |
1474 | AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype); | |
9a564108 | 1475 | else if (comp_type != rawtype) |
2ea2a609 HF |
1476 | AP_DBF_INFO("get_comp_type queue=%02x.%04x map type %d to %d\n", |
1477 | AP_QID_CARD(qid), AP_QID_QUEUE(qid), | |
1478 | rawtype, comp_type); | |
9a564108 HF |
1479 | return comp_type; |
1480 | } | |
1481 | ||
e28d2af4 | 1482 | /* |
a7b1868a | 1483 | * Helper function to be used with bus_find_dev |
e28d2af4 | 1484 | * matches for the card device with the given id |
1534c382 | 1485 | */ |
418e3ea1 | 1486 | static int __match_card_device_with_id(struct device *dev, const void *data) |
1534c382 | 1487 | { |
418e3ea1 | 1488 | return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long)(void *) data; |
1534c382 MS |
1489 | } |
1490 | ||
a7b1868a HF |
1491 | /* |
1492 | * Helper function to be used with bus_find_dev | |
e28d2af4 IT |
1493 | * matches for the queue device with a given qid |
1494 | */ | |
418e3ea1 | 1495 | static int __match_queue_device_with_qid(struct device *dev, const void *data) |
e28d2af4 IT |
1496 | { |
1497 | return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long) data; | |
1498 | } | |
1499 | ||
b1af7528 HF |
1500 | /* |
1501 | * Helper function to be used with bus_find_dev | |
1502 | * matches any queue device with given queue id | |
1503 | */ | |
418e3ea1 | 1504 | static int __match_queue_device_with_queue_id(struct device *dev, const void *data) |
b1af7528 HF |
1505 | { |
1506 | return is_queue_dev(dev) | |
1507 | && AP_QID_QUEUE(to_ap_queue(dev)->qid) == (int)(long) data; | |
1508 | } | |
1509 | ||
a7b1868a HF |
1510 | /* |
1511 | * Helper function for ap_scan_bus(). | |
4f2fcccd HF |
1512 | * Remove card device and associated queue devices. |
1513 | */ | |
1514 | static inline void ap_scan_rm_card_dev_and_queue_devs(struct ap_card *ac) | |
1515 | { | |
1516 | bus_for_each_dev(&ap_bus_type, NULL, | |
1517 | (void *)(long) ac->id, | |
1518 | __ap_queue_devices_with_id_unregister); | |
1519 | device_unregister(&ac->ap_dev.device); | |
1520 | } | |
1521 | ||
1522 | /* | |
1523 | * Helper function for ap_scan_bus(). | |
1524 | * Does the scan bus job for all the domains within | |
1525 | * a valid adapter given by an ap_card ptr. | |
e28d2af4 | 1526 | */ |
4f2fcccd | 1527 | static inline void ap_scan_domains(struct ap_card *ac) |
1534c382 | 1528 | { |
4f2fcccd | 1529 | bool decfg; |
a7b1868a HF |
1530 | ap_qid_t qid; |
1531 | unsigned int func; | |
1534c382 | 1532 | struct device *dev; |
a7b1868a | 1533 | struct ap_queue *aq; |
bd39654a | 1534 | int rc, dom, depth, type, ml; |
4f2fcccd HF |
1535 | |
1536 | /* | |
1537 | * Go through the configuration for the domains and compare them | |
1538 | * to the existing queue devices. Also take care of the config | |
1539 | * and error state for the queue devices. | |
1540 | */ | |
1541 | ||
1542 | for (dom = 0; dom <= ap_max_domain_id; dom++) { | |
1543 | qid = AP_MKQID(ac->id, dom); | |
1544 | dev = bus_find_device(&ap_bus_type, NULL, | |
1545 | (void *)(long) qid, | |
1546 | __match_queue_device_with_qid); | |
1547 | aq = dev ? to_ap_queue(dev) : NULL; | |
1548 | if (!ap_test_config_usage_domain(dom)) { | |
1549 | if (dev) { | |
1550 | AP_DBF_INFO("%s(%d,%d) not in config any more, rm queue device\n", | |
1551 | __func__, ac->id, dom); | |
1552 | device_unregister(dev); | |
1553 | put_device(dev); | |
1554 | } | |
1555 | continue; | |
1556 | } | |
1557 | /* domain is valid, get info from this APQN */ | |
bd39654a | 1558 | if (!ap_queue_info(qid, &type, &func, &depth, &ml, &decfg)) { |
4f2fcccd HF |
1559 | if (aq) { |
1560 | AP_DBF_INFO( | |
1561 | "%s(%d,%d) ap_queue_info() not successful, rm queue device\n", | |
1562 | __func__, ac->id, dom); | |
1563 | device_unregister(dev); | |
1564 | put_device(dev); | |
1565 | } | |
1566 | continue; | |
1567 | } | |
1568 | /* if no queue device exists, create a new one */ | |
1569 | if (!aq) { | |
1570 | aq = ap_queue_create(qid, ac->ap_dev.device_type); | |
1571 | if (!aq) { | |
1572 | AP_DBF_WARN("%s(%d,%d) ap_queue_create() failed\n", | |
1573 | __func__, ac->id, dom); | |
1574 | continue; | |
1575 | } | |
1576 | aq->card = ac; | |
1577 | aq->config = !decfg; | |
1578 | dev = &aq->ap_dev.device; | |
1579 | dev->bus = &ap_bus_type; | |
1580 | dev->parent = &ac->ap_dev.device; | |
1581 | dev_set_name(dev, "%02x.%04x", ac->id, dom); | |
1582 | /* register queue device */ | |
1583 | rc = device_register(dev); | |
1584 | if (rc) { | |
1585 | AP_DBF_WARN("%s(%d,%d) device_register() failed\n", | |
1586 | __func__, ac->id, dom); | |
1587 | goto put_dev_and_continue; | |
1588 | } | |
29c2680f HF |
1589 | /* get it and thus adjust reference counter */ |
1590 | get_device(dev); | |
4f2fcccd HF |
1591 | if (decfg) |
1592 | AP_DBF_INFO("%s(%d,%d) new (decfg) queue device created\n", | |
1593 | __func__, ac->id, dom); | |
1594 | else | |
1595 | AP_DBF_INFO("%s(%d,%d) new queue device created\n", | |
1596 | __func__, ac->id, dom); | |
1597 | goto put_dev_and_continue; | |
1598 | } | |
1599 | /* Check config state on the already existing queue device */ | |
1600 | spin_lock_bh(&aq->lock); | |
1601 | if (decfg && aq->config) { | |
1602 | /* config off this queue device */ | |
1603 | aq->config = false; | |
1604 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1605 | aq->dev_state = AP_DEV_STATE_ERROR; | |
1606 | aq->last_err_rc = AP_RESPONSE_DECONFIGURED; | |
1607 | } | |
1608 | spin_unlock_bh(&aq->lock); | |
1609 | AP_DBF_INFO("%s(%d,%d) queue device config off\n", | |
1610 | __func__, ac->id, dom); | |
df6f508c | 1611 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
4f2fcccd HF |
1612 | /* 'receive' pending messages with -EAGAIN */ |
1613 | ap_flush_queue(aq); | |
1614 | goto put_dev_and_continue; | |
1615 | } | |
1616 | if (!decfg && !aq->config) { | |
1617 | /* config on this queue device */ | |
1618 | aq->config = true; | |
1619 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1620 | aq->dev_state = AP_DEV_STATE_OPERATING; | |
1621 | aq->sm_state = AP_SM_STATE_RESET_START; | |
1622 | } | |
1623 | spin_unlock_bh(&aq->lock); | |
1624 | AP_DBF_INFO("%s(%d,%d) queue device config on\n", | |
1625 | __func__, ac->id, dom); | |
df6f508c | 1626 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
4f2fcccd HF |
1627 | goto put_dev_and_continue; |
1628 | } | |
1629 | /* handle other error states */ | |
1630 | if (!decfg && aq->dev_state == AP_DEV_STATE_ERROR) { | |
1631 | spin_unlock_bh(&aq->lock); | |
1632 | /* 'receive' pending messages with -EAGAIN */ | |
1633 | ap_flush_queue(aq); | |
1634 | /* re-init (with reset) the queue device */ | |
1635 | ap_queue_init_state(aq); | |
1636 | AP_DBF_INFO("%s(%d,%d) queue device reinit enforced\n", | |
1637 | __func__, ac->id, dom); | |
1638 | goto put_dev_and_continue; | |
1639 | } | |
1640 | spin_unlock_bh(&aq->lock); | |
1641 | put_dev_and_continue: | |
1642 | put_device(dev); | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | /* | |
1647 | * Helper function for ap_scan_bus(). | |
1648 | * Does the scan bus job for the given adapter id. | |
1649 | */ | |
1650 | static inline void ap_scan_adapter(int ap) | |
1651 | { | |
1652 | bool decfg; | |
1653 | ap_qid_t qid; | |
1654 | unsigned int func; | |
1655 | struct device *dev; | |
1656 | struct ap_card *ac; | |
bd39654a | 1657 | int rc, dom, depth, type, comp_type, ml; |
a7b1868a | 1658 | |
4f2fcccd | 1659 | /* Is there currently a card device for this adapter ? */ |
a7b1868a | 1660 | dev = bus_find_device(&ap_bus_type, NULL, |
4f2fcccd | 1661 | (void *)(long) ap, |
a7b1868a HF |
1662 | __match_card_device_with_id); |
1663 | ac = dev ? to_ap_card(dev) : NULL; | |
4f2fcccd HF |
1664 | |
1665 | /* Adapter not in configuration ? */ | |
1666 | if (!ap_test_config_card_id(ap)) { | |
1667 | if (ac) { | |
1668 | AP_DBF_INFO("%s(%d) ap not in config any more, rm card and queue devices\n", | |
1669 | __func__, ap); | |
1670 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
a7b1868a HF |
1671 | put_device(dev); |
1672 | } | |
1673 | return; | |
1674 | } | |
cccd85bf | 1675 | |
a7b1868a | 1676 | /* |
4f2fcccd HF |
1677 | * Adapter ap is valid in the current configuration. So do some checks: |
1678 | * If no card device exists, build one. If a card device exists, check | |
1679 | * for type and functions changed. For all this we need to find a valid | |
1680 | * APQN first. | |
a7b1868a | 1681 | */ |
4f2fcccd HF |
1682 | |
1683 | for (dom = 0; dom <= ap_max_domain_id; dom++) | |
1684 | if (ap_test_config_usage_domain(dom)) { | |
1685 | qid = AP_MKQID(ap, dom); | |
bd39654a HF |
1686 | if (ap_queue_info(qid, &type, &func, |
1687 | &depth, &ml, &decfg)) | |
a7b1868a HF |
1688 | break; |
1689 | } | |
4f2fcccd HF |
1690 | if (dom > ap_max_domain_id) { |
1691 | /* Could not find a valid APQN for this adapter */ | |
1692 | if (ac) { | |
1693 | AP_DBF_INFO( | |
1694 | "%s(%d) no type info (no APQN found), rm card and queue devices\n", | |
1695 | __func__, ap); | |
1696 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
1697 | put_device(dev); | |
1698 | } else { | |
1699 | AP_DBF_DBG("%s(%d) no type info (no APQN found), ignored\n", | |
1700 | __func__, ap); | |
a7b1868a | 1701 | } |
4f2fcccd HF |
1702 | return; |
1703 | } | |
1704 | if (!type) { | |
1705 | /* No apdater type info available, an unusable adapter */ | |
1706 | if (ac) { | |
1707 | AP_DBF_INFO("%s(%d) no valid type (0) info, rm card and queue devices\n", | |
1708 | __func__, ap); | |
1709 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
a7b1868a | 1710 | put_device(dev); |
4f2fcccd HF |
1711 | } else { |
1712 | AP_DBF_DBG("%s(%d) no valid type (0) info, ignored\n", | |
1713 | __func__, ap); | |
a7b1868a | 1714 | } |
4f2fcccd | 1715 | return; |
a7b1868a | 1716 | } |
889875a1 | 1717 | |
4f2fcccd HF |
1718 | if (ac) { |
1719 | /* Check APQN against existing card device for changes */ | |
1720 | if (ac->raw_hwtype != type) { | |
1721 | AP_DBF_INFO("%s(%d) hwtype %d changed, rm card and queue devices\n", | |
1722 | __func__, ap, type); | |
1723 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
1724 | put_device(dev); | |
1725 | ac = NULL; | |
1726 | } else if (ac->functions != func) { | |
1727 | AP_DBF_INFO("%s(%d) functions 0x%08x changed, rm card and queue devices\n", | |
1728 | __func__, ap, type); | |
1729 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
1730 | put_device(dev); | |
1731 | ac = NULL; | |
1732 | } else { | |
1733 | if (decfg && ac->config) { | |
1734 | ac->config = false; | |
1735 | AP_DBF_INFO("%s(%d) card device config off\n", | |
1736 | __func__, ap); | |
df6f508c | 1737 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
e28d2af4 | 1738 | } |
4f2fcccd HF |
1739 | if (!decfg && !ac->config) { |
1740 | ac->config = true; | |
1741 | AP_DBF_INFO("%s(%d) card device config on\n", | |
1742 | __func__, ap); | |
df6f508c | 1743 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
b1af7528 | 1744 | } |
a7b1868a | 1745 | } |
4f2fcccd HF |
1746 | } |
1747 | ||
1748 | if (!ac) { | |
1749 | /* Build a new card device */ | |
a7b1868a | 1750 | comp_type = ap_get_compatible_type(qid, type, func); |
4f2fcccd HF |
1751 | if (!comp_type) { |
1752 | AP_DBF_WARN("%s(%d) type %d, can't get compatibility type\n", | |
1753 | __func__, ap, type); | |
1754 | return; | |
1755 | } | |
bd39654a | 1756 | ac = ap_card_create(ap, depth, type, comp_type, func, ml); |
a7b1868a | 1757 | if (!ac) { |
4f2fcccd HF |
1758 | AP_DBF_WARN("%s(%d) ap_card_create() failed\n", |
1759 | __func__, ap); | |
1760 | return; | |
a7b1868a | 1761 | } |
4f2fcccd HF |
1762 | ac->config = !decfg; |
1763 | dev = &ac->ap_dev.device; | |
1764 | dev->bus = &ap_bus_type; | |
1765 | dev->parent = ap_root_device; | |
1766 | dev_set_name(dev, "card%02x", ap); | |
bd39654a HF |
1767 | /* maybe enlarge ap_max_msg_size to support this card */ |
1768 | if (ac->maxmsgsize > atomic_read(&ap_max_msg_size)) { | |
1769 | atomic_set(&ap_max_msg_size, ac->maxmsgsize); | |
1770 | AP_DBF_INFO("%s(%d) ap_max_msg_size update to %d byte\n", | |
1771 | __func__, ap, atomic_read(&ap_max_msg_size)); | |
1772 | } | |
4f2fcccd HF |
1773 | /* Register the new card device with AP bus */ |
1774 | rc = device_register(dev); | |
a7b1868a | 1775 | if (rc) { |
4f2fcccd HF |
1776 | AP_DBF_WARN("%s(%d) device_register() failed\n", |
1777 | __func__, ap); | |
1778 | put_device(dev); | |
1779 | return; | |
3f3007af | 1780 | } |
4f2fcccd HF |
1781 | /* get it and thus adjust reference counter */ |
1782 | get_device(dev); | |
1783 | if (decfg) | |
1784 | AP_DBF_INFO("%s(%d) new (decfg) card device type=%d func=0x%08x created\n", | |
1785 | __func__, ap, type, func); | |
1786 | else | |
1787 | AP_DBF_INFO("%s(%d) new card device type=%d func=0x%08x created\n", | |
1788 | __func__, ap, type, func); | |
1789 | } | |
1790 | ||
1791 | /* Verify the domains and the queue devices for this card */ | |
1792 | ap_scan_domains(ac); | |
a7b1868a | 1793 | |
4f2fcccd HF |
1794 | /* release the card device */ |
1795 | put_device(&ac->ap_dev.device); | |
a7b1868a | 1796 | } |
ac994e80 | 1797 | |
a7b1868a HF |
1798 | /** |
1799 | * ap_scan_bus(): Scan the AP bus for new devices | |
1800 | * Runs periodically, workqueue timer (ap_config_time) | |
1801 | */ | |
1802 | static void ap_scan_bus(struct work_struct *unused) | |
1803 | { | |
4f2fcccd | 1804 | int ap; |
a7b1868a | 1805 | |
c8337c47 | 1806 | ap_fetch_qci_info(ap_qci_info); |
a7b1868a HF |
1807 | ap_select_domain(); |
1808 | ||
2ea2a609 | 1809 | AP_DBF_DBG("%s running\n", __func__); |
c8337c47 | 1810 | |
a7b1868a | 1811 | /* loop over all possible adapters */ |
4f2fcccd HF |
1812 | for (ap = 0; ap <= ap_max_adapter_id; ap++) |
1813 | ap_scan_adapter(ap); | |
a7b1868a HF |
1814 | |
1815 | /* check if there is at least one queue available with default domain */ | |
1816 | if (ap_domain_index >= 0) { | |
1817 | struct device *dev = | |
1818 | bus_find_device(&ap_bus_type, NULL, | |
1819 | (void *)(long) ap_domain_index, | |
b1af7528 | 1820 | __match_queue_device_with_queue_id); |
a7b1868a HF |
1821 | if (dev) |
1822 | put_device(dev); | |
1823 | else | |
2ea2a609 HF |
1824 | AP_DBF_INFO("no queue device with default domain %d available\n", |
1825 | ap_domain_index); | |
a7b1868a | 1826 | } |
ac994e80 | 1827 | |
837cd105 HF |
1828 | if (atomic64_inc_return(&ap_scan_bus_count) == 1) { |
1829 | AP_DBF(DBF_DEBUG, "%s init scan complete\n", __func__); | |
1830 | ap_send_init_scan_done_uevent(); | |
1831 | ap_check_bindings_complete(); | |
1832 | } | |
1833 | ||
fcd0d1f6 | 1834 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); |
1534c382 MS |
1835 | } |
1836 | ||
cefbeb5d | 1837 | static void ap_config_timeout(struct timer_list *unused) |
1534c382 | 1838 | { |
8139b89d | 1839 | queue_work(system_long_wq, &ap_scan_work); |
1534c382 | 1840 | } |
13e742ba | 1841 | |
efda7ade | 1842 | static int __init ap_debug_init(void) |
cccd85bf | 1843 | { |
cccd85bf HF |
1844 | ap_dbf_info = debug_register("ap", 1, 1, |
1845 | DBF_MAX_SPRINTF_ARGS * sizeof(long)); | |
1846 | debug_register_view(ap_dbf_info, &debug_sprintf_view); | |
1847 | debug_set_level(ap_dbf_info, DBF_ERR); | |
1848 | ||
1849 | return 0; | |
1850 | } | |
1851 | ||
7e0bdbe5 HF |
1852 | static void __init ap_perms_init(void) |
1853 | { | |
3d8f60d3 | 1854 | /* all resources useable if no kernel parameter string given */ |
00fab235 | 1855 | memset(&ap_perms.ioctlm, 0xFF, sizeof(ap_perms.ioctlm)); |
7e0bdbe5 HF |
1856 | memset(&ap_perms.apm, 0xFF, sizeof(ap_perms.apm)); |
1857 | memset(&ap_perms.aqm, 0xFF, sizeof(ap_perms.aqm)); | |
1858 | ||
3d8f60d3 | 1859 | /* apm kernel parameter string */ |
7e0bdbe5 | 1860 | if (apm_str) { |
3d8f60d3 | 1861 | memset(&ap_perms.apm, 0, sizeof(ap_perms.apm)); |
00fab235 HF |
1862 | ap_parse_mask_str(apm_str, ap_perms.apm, AP_DEVICES, |
1863 | &ap_perms_mutex); | |
7e0bdbe5 | 1864 | } |
7e0bdbe5 | 1865 | |
3d8f60d3 HF |
1866 | /* aqm kernel parameter string */ |
1867 | if (aqm_str) { | |
1868 | memset(&ap_perms.aqm, 0, sizeof(ap_perms.aqm)); | |
00fab235 HF |
1869 | ap_parse_mask_str(aqm_str, ap_perms.aqm, AP_DOMAINS, |
1870 | &ap_perms_mutex); | |
7e0bdbe5 HF |
1871 | } |
1872 | } | |
1873 | ||
1534c382 | 1874 | /** |
1749a81d FB |
1875 | * ap_module_init(): The module initialization code. |
1876 | * | |
1877 | * Initializes the module. | |
1534c382 | 1878 | */ |
efda7ade | 1879 | static int __init ap_module_init(void) |
1534c382 | 1880 | { |
8cb4c20f | 1881 | int rc; |
1534c382 | 1882 | |
cccd85bf HF |
1883 | rc = ap_debug_init(); |
1884 | if (rc) | |
1885 | return rc; | |
1886 | ||
2395103b | 1887 | if (!ap_instructions_available()) { |
889875a1 MS |
1888 | pr_warn("The hardware system does not support AP instructions\n"); |
1889 | return -ENODEV; | |
1890 | } | |
1891 | ||
bc4b295e HF |
1892 | /* init ap_queue hashtable */ |
1893 | hash_init(ap_queues); | |
1894 | ||
00fab235 | 1895 | /* set up the AP permissions (ioctls, ap and aq masks) */ |
7e0bdbe5 HF |
1896 | ap_perms_init(); |
1897 | ||
889875a1 | 1898 | /* Get AP configuration data if available */ |
c8337c47 HF |
1899 | ap_init_qci_info(); |
1900 | ||
1901 | /* check default domain setting */ | |
1902 | if (ap_domain_index < -1 || ap_domain_index > ap_max_domain_id || | |
7e0bdbe5 HF |
1903 | (ap_domain_index >= 0 && |
1904 | !test_bit_inv(ap_domain_index, ap_perms.aqm))) { | |
889875a1 MS |
1905 | pr_warn("%d is not a valid cryptographic domain\n", |
1906 | ap_domain_index); | |
ac994e80 | 1907 | ap_domain_index = -1; |
1534c382 | 1908 | } |
5314af69 | 1909 | |
c8337c47 | 1910 | /* enable interrupts if available */ |
cb17a636 | 1911 | if (ap_interrupts_available()) { |
f4eae94f MS |
1912 | rc = register_adapter_interrupt(&ap_airq); |
1913 | ap_airq_flag = (rc == 0); | |
cb17a636 FB |
1914 | } |
1915 | ||
1534c382 MS |
1916 | /* Create /sys/bus/ap. */ |
1917 | rc = bus_register(&ap_bus_type); | |
1918 | if (rc) | |
1919 | goto out; | |
1534c382 MS |
1920 | |
1921 | /* Create /sys/devices/ap. */ | |
035da16f | 1922 | ap_root_device = root_device_register("ap"); |
9c705206 | 1923 | rc = PTR_ERR_OR_ZERO(ap_root_device); |
1534c382 MS |
1924 | if (rc) |
1925 | goto out_bus; | |
837cd105 | 1926 | ap_root_device->bus = &ap_bus_type; |
1534c382 | 1927 | |
1749a81d | 1928 | /* Setup the AP bus rescan timer. */ |
cefbeb5d | 1929 | timer_setup(&ap_config_timer, ap_config_timeout, 0); |
1534c382 | 1930 | |
3f3007af MS |
1931 | /* |
1932 | * Setup the high resultion poll timer. | |
fe137230 FB |
1933 | * If we are running under z/VM adjust polling to z/VM polling rate. |
1934 | */ | |
1935 | if (MACHINE_IS_VM) | |
1936 | poll_timeout = 1500000; | |
1937 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); | |
1938 | ap_poll_timer.function = ap_poll_timeout; | |
1939 | ||
1534c382 MS |
1940 | /* Start the low priority AP bus poll thread. */ |
1941 | if (ap_thread_flag) { | |
1942 | rc = ap_poll_thread_start(); | |
1943 | if (rc) | |
1944 | goto out_work; | |
1945 | } | |
1946 | ||
8139b89d | 1947 | queue_work(system_long_wq, &ap_scan_work); |
3f3007af | 1948 | |
1534c382 MS |
1949 | return 0; |
1950 | ||
1951 | out_work: | |
fe137230 | 1952 | hrtimer_cancel(&ap_poll_timer); |
035da16f | 1953 | root_device_unregister(ap_root_device); |
1534c382 | 1954 | out_bus: |
1534c382 MS |
1955 | bus_unregister(&ap_bus_type); |
1956 | out: | |
f4eae94f MS |
1957 | if (ap_using_interrupts()) |
1958 | unregister_adapter_interrupt(&ap_airq); | |
c8337c47 | 1959 | kfree(ap_qci_info); |
1534c382 MS |
1960 | return rc; |
1961 | } | |
50a0d46c | 1962 | device_initcall(ap_module_init); |