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> |
4f8206b8 | 39 | #include <linux/module.h> |
1534c382 MS |
40 | |
41 | #include "ap_bus.h" | |
cccd85bf | 42 | #include "ap_debug.h" |
1534c382 | 43 | |
1749a81d | 44 | /* |
50a0d46c | 45 | * Module parameters; note though this file itself isn't modular. |
1534c382 MS |
46 | */ |
47 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ | |
fc1d3f02 | 48 | static DEFINE_SPINLOCK(ap_domain_lock); |
ac2b96f3 | 49 | module_param_named(domain, ap_domain_index, int, 0440); |
1534c382 MS |
50 | MODULE_PARM_DESC(domain, "domain index for ap devices"); |
51 | EXPORT_SYMBOL(ap_domain_index); | |
52 | ||
ac2b96f3 HF |
53 | static int ap_thread_flag; |
54 | module_param_named(poll_thread, ap_thread_flag, int, 0440); | |
b90b34c6 | 55 | MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)."); |
1534c382 | 56 | |
7e0bdbe5 HF |
57 | static char *apm_str; |
58 | module_param_named(apmask, apm_str, charp, 0440); | |
59 | MODULE_PARM_DESC(apmask, "AP bus adapter mask."); | |
60 | ||
61 | static char *aqm_str; | |
62 | module_param_named(aqmask, aqm_str, charp, 0440); | |
63 | MODULE_PARM_DESC(aqmask, "AP bus domain mask."); | |
64 | ||
d0982725 HF |
65 | static int ap_useirq = 1; |
66 | module_param_named(useirq, ap_useirq, int, 0440); | |
67 | MODULE_PARM_DESC(useirq, "Use interrupt if available, default is 1 (on)."); | |
68 | ||
bd39654a HF |
69 | atomic_t ap_max_msg_size = ATOMIC_INIT(AP_DEFAULT_MAX_MSG_SIZE); |
70 | EXPORT_SYMBOL(ap_max_msg_size); | |
71 | ||
e28d2af4 IT |
72 | static struct device *ap_root_device; |
73 | ||
bc4b295e HF |
74 | /* Hashtable of all queue devices on the AP bus */ |
75 | DEFINE_HASHTABLE(ap_queues, 8); | |
76 | /* lock used for the ap_queues hashtable */ | |
77 | DEFINE_SPINLOCK(ap_queues_lock); | |
e28d2af4 | 78 | |
00fab235 HF |
79 | /* Default permissions (ioctl, card and domain masking) */ |
80 | struct ap_perms ap_perms; | |
81 | EXPORT_SYMBOL(ap_perms); | |
82 | DEFINE_MUTEX(ap_perms_mutex); | |
83 | EXPORT_SYMBOL(ap_perms_mutex); | |
7e0bdbe5 | 84 | |
837cd105 HF |
85 | /* # of bus scans since init */ |
86 | static atomic64_t ap_scan_bus_count; | |
87 | ||
0677519a HF |
88 | /* # of bindings complete since init */ |
89 | static atomic64_t ap_bindings_complete_count = ATOMIC64_INIT(0); | |
90 | ||
837cd105 HF |
91 | /* completion for initial APQN bindings complete */ |
92 | static DECLARE_COMPLETION(ap_init_apqn_bindings_complete); | |
93 | ||
c8337c47 | 94 | static struct ap_config_info *ap_qci_info; |
28391585 | 95 | static struct ap_config_info *ap_qci_info_old; |
1534c382 | 96 | |
cccd85bf HF |
97 | /* |
98 | * AP bus related debug feature things. | |
99 | */ | |
cccd85bf HF |
100 | debug_info_t *ap_dbf_info; |
101 | ||
1749a81d | 102 | /* |
8139b89d | 103 | * Workqueue timer for bus rescan. |
1534c382 | 104 | */ |
1534c382 MS |
105 | static struct timer_list ap_config_timer; |
106 | static int ap_config_time = AP_CONFIG_TIME; | |
3f3007af | 107 | static void ap_scan_bus(struct work_struct *); |
8139b89d | 108 | static DECLARE_WORK(ap_scan_work, ap_scan_bus); |
1534c382 | 109 | |
1749a81d | 110 | /* |
cb17a636 | 111 | * Tasklet & timer for AP request polling and interrupts |
1534c382 | 112 | */ |
3f3007af | 113 | static void ap_tasklet_fn(unsigned long); |
b13fecb1 | 114 | static DECLARE_TASKLET_OLD(ap_tasklet, ap_tasklet_fn); |
1534c382 | 115 | static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait); |
ac2b96f3 | 116 | static struct task_struct *ap_poll_kthread; |
1534c382 | 117 | static DEFINE_MUTEX(ap_poll_thread_mutex); |
93521314 | 118 | static DEFINE_SPINLOCK(ap_poll_timer_lock); |
fe137230 | 119 | static struct hrtimer ap_poll_timer; |
ac2b96f3 HF |
120 | /* |
121 | * In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds. | |
122 | * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling. | |
123 | */ | |
fe137230 | 124 | static unsigned long long poll_timeout = 250000; |
1534c382 | 125 | |
c8337c47 HF |
126 | /* Maximum domain id, if not given via qci */ |
127 | static int ap_max_domain_id = 15; | |
128 | /* Maximum adapter id, if not given via qci */ | |
129 | static int ap_max_adapter_id = 63; | |
41677b1d | 130 | |
772f5472 FB |
131 | static struct bus_type ap_bus_type; |
132 | ||
f4eae94f | 133 | /* Adapter interrupt definitions */ |
30e63ef2 | 134 | static void ap_interrupt_handler(struct airq_struct *airq, bool floating); |
3f3007af | 135 | |
cabebb69 | 136 | static bool ap_irq_flag; |
f4eae94f MS |
137 | |
138 | static struct airq_struct ap_airq = { | |
139 | .handler = ap_interrupt_handler, | |
140 | .isc = AP_ISC, | |
141 | }; | |
142 | ||
e28d2af4 IT |
143 | /** |
144 | * ap_airq_ptr() - Get the address of the adapter interrupt indicator | |
145 | * | |
146 | * Returns the address of the local-summary-indicator of the adapter | |
147 | * interrupt handler for AP, or NULL if adapter interrupts are not | |
148 | * available. | |
149 | */ | |
150 | void *ap_airq_ptr(void) | |
151 | { | |
cabebb69 | 152 | if (ap_irq_flag) |
e28d2af4 IT |
153 | return ap_airq.lsi_ptr; |
154 | return NULL; | |
155 | } | |
156 | ||
cb17a636 FB |
157 | /** |
158 | * ap_interrupts_available(): Test if AP interrupts are available. | |
159 | * | |
160 | * Returns 1 if AP interrupts are available. | |
161 | */ | |
162 | static int ap_interrupts_available(void) | |
163 | { | |
86cd741b | 164 | return test_facility(65); |
cb17a636 FB |
165 | } |
166 | ||
75014550 | 167 | /** |
c8337c47 HF |
168 | * ap_qci_available(): Test if AP configuration |
169 | * information can be queried via QCI subfunction. | |
75014550 | 170 | * |
c8337c47 | 171 | * Returns 1 if subfunction PQAP(QCI) is available. |
75014550 | 172 | */ |
c8337c47 | 173 | static int ap_qci_available(void) |
75014550 | 174 | { |
86cd741b | 175 | return test_facility(12); |
75014550 HD |
176 | } |
177 | ||
e7fc5146 TK |
178 | /** |
179 | * ap_apft_available(): Test if AP facilities test (APFT) | |
180 | * facility is available. | |
181 | * | |
2004b57c | 182 | * Returns 1 if APFT is available. |
e7fc5146 TK |
183 | */ |
184 | static int ap_apft_available(void) | |
185 | { | |
186 | return test_facility(15); | |
187 | } | |
188 | ||
9a564108 HF |
189 | /* |
190 | * ap_qact_available(): Test if the PQAP(QACT) subfunction is available. | |
191 | * | |
192 | * Returns 1 if the QACT subfunction is available. | |
193 | */ | |
194 | static inline int ap_qact_available(void) | |
195 | { | |
c8337c47 HF |
196 | if (ap_qci_info) |
197 | return ap_qci_info->qact; | |
9a564108 HF |
198 | return 0; |
199 | } | |
200 | ||
050349b5 | 201 | /* |
c8337c47 | 202 | * ap_fetch_qci_info(): Fetch cryptographic config info |
050349b5 HF |
203 | * |
204 | * Returns the ap configuration info fetched via PQAP(QCI). | |
205 | * On success 0 is returned, on failure a negative errno | |
206 | * is returned, e.g. if the PQAP(QCI) instruction is not | |
207 | * available, the return value will be -EOPNOTSUPP. | |
208 | */ | |
c8337c47 | 209 | static inline int ap_fetch_qci_info(struct ap_config_info *info) |
11d37673 | 210 | { |
c8337c47 | 211 | if (!ap_qci_available()) |
11d37673 | 212 | return -EOPNOTSUPP; |
050349b5 HF |
213 | if (!info) |
214 | return -EINVAL; | |
215 | return ap_qci(info); | |
11d37673 HC |
216 | } |
217 | ||
889875a1 | 218 | /** |
c8337c47 HF |
219 | * ap_init_qci_info(): Allocate and query qci config info. |
220 | * Does also update the static variables ap_max_domain_id | |
221 | * and ap_max_adapter_id if this info is available. | |
889875a1 | 222 | */ |
c8337c47 | 223 | static void __init ap_init_qci_info(void) |
889875a1 | 224 | { |
c8337c47 | 225 | if (!ap_qci_available()) { |
2ea2a609 | 226 | AP_DBF_INFO("%s QCI not supported\n", __func__); |
889875a1 | 227 | return; |
c8337c47 | 228 | } |
889875a1 | 229 | |
c8337c47 HF |
230 | ap_qci_info = kzalloc(sizeof(*ap_qci_info), GFP_KERNEL); |
231 | if (!ap_qci_info) | |
889875a1 | 232 | return; |
28391585 TK |
233 | ap_qci_info_old = kzalloc(sizeof(*ap_qci_info_old), GFP_KERNEL); |
234 | if (!ap_qci_info_old) | |
235 | return; | |
c8337c47 HF |
236 | if (ap_fetch_qci_info(ap_qci_info) != 0) { |
237 | kfree(ap_qci_info); | |
28391585 | 238 | kfree(ap_qci_info_old); |
c8337c47 | 239 | ap_qci_info = NULL; |
28391585 | 240 | ap_qci_info_old = NULL; |
889875a1 MS |
241 | return; |
242 | } | |
2ea2a609 | 243 | AP_DBF_INFO("%s successful fetched initial qci info\n", __func__); |
c8337c47 HF |
244 | |
245 | if (ap_qci_info->apxa) { | |
246 | if (ap_qci_info->Na) { | |
247 | ap_max_adapter_id = ap_qci_info->Na; | |
2ea2a609 HF |
248 | AP_DBF_INFO("%s new ap_max_adapter_id is %d\n", |
249 | __func__, ap_max_adapter_id); | |
c8337c47 HF |
250 | } |
251 | if (ap_qci_info->Nd) { | |
252 | ap_max_domain_id = ap_qci_info->Nd; | |
2ea2a609 HF |
253 | AP_DBF_INFO("%s new ap_max_domain_id is %d\n", |
254 | __func__, ap_max_domain_id); | |
c8337c47 HF |
255 | } |
256 | } | |
28391585 TK |
257 | |
258 | memcpy(ap_qci_info_old, ap_qci_info, sizeof(*ap_qci_info)); | |
889875a1 MS |
259 | } |
260 | ||
261 | /* | |
262 | * ap_test_config(): helper function to extract the nrth bit | |
263 | * within the unsigned int array field. | |
264 | */ | |
265 | static inline int ap_test_config(unsigned int *field, unsigned int nr) | |
266 | { | |
267 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
268 | } | |
269 | ||
270 | /* | |
271 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
889875a1 MS |
272 | * |
273 | * Returns 0 if the card is not configured | |
274 | * 1 if the card is configured or | |
275 | * if the configuration information is not available | |
276 | */ | |
277 | static inline int ap_test_config_card_id(unsigned int id) | |
278 | { | |
c8337c47 HF |
279 | if (id > ap_max_adapter_id) |
280 | return 0; | |
281 | if (ap_qci_info) | |
282 | return ap_test_config(ap_qci_info->apm, id); | |
283 | return 1; | |
889875a1 MS |
284 | } |
285 | ||
286 | /* | |
7379e652 HF |
287 | * ap_test_config_usage_domain(): Test, whether an AP usage domain |
288 | * is configured. | |
889875a1 MS |
289 | * |
290 | * Returns 0 if the usage domain is not configured | |
291 | * 1 if the usage domain is configured or | |
292 | * if the configuration information is not available | |
293 | */ | |
7379e652 | 294 | int ap_test_config_usage_domain(unsigned int domain) |
889875a1 | 295 | { |
c8337c47 HF |
296 | if (domain > ap_max_domain_id) |
297 | return 0; | |
298 | if (ap_qci_info) | |
299 | return ap_test_config(ap_qci_info->aqm, domain); | |
300 | return 1; | |
889875a1 | 301 | } |
7379e652 HF |
302 | EXPORT_SYMBOL(ap_test_config_usage_domain); |
303 | ||
304 | /* | |
305 | * ap_test_config_ctrl_domain(): Test, whether an AP control domain | |
306 | * is configured. | |
307 | * @domain AP control domain ID | |
308 | * | |
309 | * Returns 1 if the control domain is configured | |
310 | * 0 in all other cases | |
311 | */ | |
312 | int ap_test_config_ctrl_domain(unsigned int domain) | |
313 | { | |
c8337c47 | 314 | if (!ap_qci_info || domain > ap_max_domain_id) |
7379e652 | 315 | return 0; |
c8337c47 | 316 | return ap_test_config(ap_qci_info->adm, domain); |
7379e652 HF |
317 | } |
318 | EXPORT_SYMBOL(ap_test_config_ctrl_domain); | |
889875a1 | 319 | |
c8337c47 HF |
320 | /* |
321 | * ap_queue_info(): Check and get AP queue info. | |
322 | * Returns true if TAPQ succeeded and the info is filled or | |
323 | * false otherwise. | |
1534c382 | 324 | */ |
bd39654a | 325 | static bool ap_queue_info(ap_qid_t qid, int *q_type, unsigned int *q_fac, |
a7e701db | 326 | int *q_depth, int *q_ml, bool *q_decfg, bool *q_cstop) |
1534c382 MS |
327 | { |
328 | struct ap_queue_status status; | |
bd39654a HF |
329 | union { |
330 | unsigned long value; | |
331 | struct { | |
332 | unsigned int fac : 32; /* facility bits */ | |
333 | unsigned int at : 8; /* ap type */ | |
334 | unsigned int _res1 : 8; | |
335 | unsigned int _res2 : 4; | |
336 | unsigned int ml : 4; /* apxl ml */ | |
337 | unsigned int _res3 : 4; | |
338 | unsigned int qd : 4; /* queue depth */ | |
339 | } tapq_gr2; | |
340 | } tapq_info; | |
341 | ||
342 | tapq_info.value = 0; | |
889875a1 | 343 | |
c8337c47 HF |
344 | /* make sure we don't run into a specifiation exception */ |
345 | if (AP_QID_CARD(qid) > ap_max_adapter_id || | |
346 | AP_QID_QUEUE(qid) > ap_max_domain_id) | |
347 | return false; | |
1534c382 | 348 | |
c8337c47 | 349 | /* call TAPQ on this APQN */ |
bd39654a | 350 | status = ap_test_queue(qid, ap_apft_available(), &tapq_info.value); |
c50a160c IT |
351 | switch (status.response_code) { |
352 | case AP_RESPONSE_NORMAL: | |
c8337c47 | 353 | case AP_RESPONSE_RESET_IN_PROGRESS: |
4f2fcccd HF |
354 | case AP_RESPONSE_DECONFIGURED: |
355 | case AP_RESPONSE_CHECKSTOPPED: | |
356 | case AP_RESPONSE_BUSY: | |
c8337c47 HF |
357 | /* |
358 | * According to the architecture in all these cases the | |
359 | * info should be filled. All bits 0 is not possible as | |
360 | * there is at least one of the mode bits set. | |
361 | */ | |
bd39654a | 362 | if (WARN_ON_ONCE(!tapq_info.value)) |
c8337c47 | 363 | return false; |
bd39654a HF |
364 | *q_type = tapq_info.tapq_gr2.at; |
365 | *q_fac = tapq_info.tapq_gr2.fac; | |
366 | *q_depth = tapq_info.tapq_gr2.qd; | |
367 | *q_ml = tapq_info.tapq_gr2.ml; | |
4f2fcccd | 368 | *q_decfg = status.response_code == AP_RESPONSE_DECONFIGURED; |
a7e701db | 369 | *q_cstop = status.response_code == AP_RESPONSE_CHECKSTOPPED; |
c8337c47 | 370 | switch (*q_type) { |
14878424 | 371 | /* For CEX2 and CEX3 the available functions |
a7b1868a | 372 | * are not reflected by the facilities bits. |
14878424 HF |
373 | * Instead it is coded into the type. So here |
374 | * modify the function bits based on the type. | |
375 | */ | |
376 | case AP_DEVICE_TYPE_CEX2A: | |
377 | case AP_DEVICE_TYPE_CEX3A: | |
c8337c47 | 378 | *q_fac |= 0x08000000; |
14878424 HF |
379 | break; |
380 | case AP_DEVICE_TYPE_CEX2C: | |
381 | case AP_DEVICE_TYPE_CEX3C: | |
c8337c47 | 382 | *q_fac |= 0x10000000; |
14878424 HF |
383 | break; |
384 | default: | |
385 | break; | |
386 | } | |
c8337c47 | 387 | return true; |
c50a160c | 388 | default: |
c8337c47 HF |
389 | /* |
390 | * A response code which indicates, there is no info available. | |
391 | */ | |
392 | return false; | |
1534c382 | 393 | } |
1534c382 MS |
394 | } |
395 | ||
dc4b6ded | 396 | void ap_wait(enum ap_sm_wait wait) |
3f3007af MS |
397 | { |
398 | ktime_t hr_time; | |
399 | ||
400 | switch (wait) { | |
dc4b6ded HF |
401 | case AP_SM_WAIT_AGAIN: |
402 | case AP_SM_WAIT_INTERRUPT: | |
cabebb69 | 403 | if (ap_irq_flag) |
3f3007af MS |
404 | break; |
405 | if (ap_poll_kthread) { | |
406 | wake_up(&ap_poll_wait); | |
407 | break; | |
408 | } | |
fcf0220a | 409 | fallthrough; |
dc4b6ded | 410 | case AP_SM_WAIT_TIMEOUT: |
3f3007af MS |
411 | spin_lock_bh(&ap_poll_timer_lock); |
412 | if (!hrtimer_is_queued(&ap_poll_timer)) { | |
8b0e1953 | 413 | hr_time = poll_timeout; |
3f3007af MS |
414 | hrtimer_forward_now(&ap_poll_timer, hr_time); |
415 | hrtimer_restart(&ap_poll_timer); | |
416 | } | |
417 | spin_unlock_bh(&ap_poll_timer_lock); | |
418 | break; | |
dc4b6ded | 419 | case AP_SM_WAIT_NONE: |
3f3007af MS |
420 | default: |
421 | break; | |
422 | } | |
423 | } | |
424 | ||
3f3007af MS |
425 | /** |
426 | * ap_request_timeout(): Handling of request timeouts | |
cefbeb5d | 427 | * @t: timer making this callback |
3f3007af MS |
428 | * |
429 | * Handles request timeouts. | |
430 | */ | |
cefbeb5d | 431 | void ap_request_timeout(struct timer_list *t) |
3f3007af | 432 | { |
cefbeb5d | 433 | struct ap_queue *aq = from_timer(aq, t, timeout); |
3f3007af | 434 | |
e28d2af4 | 435 | spin_lock_bh(&aq->lock); |
dc4b6ded | 436 | ap_wait(ap_sm_event(aq, AP_SM_EVENT_TIMEOUT)); |
e28d2af4 | 437 | spin_unlock_bh(&aq->lock); |
3f3007af MS |
438 | } |
439 | ||
440 | /** | |
441 | * ap_poll_timeout(): AP receive polling for finished AP requests. | |
442 | * @unused: Unused pointer. | |
443 | * | |
444 | * Schedules the AP tasklet using a high resolution timer. | |
445 | */ | |
446 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) | |
447 | { | |
41677b1d | 448 | tasklet_schedule(&ap_tasklet); |
3f3007af MS |
449 | return HRTIMER_NORESTART; |
450 | } | |
451 | ||
452 | /** | |
453 | * ap_interrupt_handler() - Schedule ap_tasklet on interrupt | |
454 | * @airq: pointer to adapter interrupt descriptor | |
948e5055 | 455 | * @floating: ignored |
3f3007af | 456 | */ |
30e63ef2 | 457 | static void ap_interrupt_handler(struct airq_struct *airq, bool floating) |
3f3007af MS |
458 | { |
459 | inc_irq_stat(IRQIO_APB); | |
41677b1d | 460 | tasklet_schedule(&ap_tasklet); |
3f3007af MS |
461 | } |
462 | ||
463 | /** | |
464 | * ap_tasklet_fn(): Tasklet to poll all AP devices. | |
465 | * @dummy: Unused variable | |
466 | * | |
467 | * Poll all AP devices on the bus. | |
468 | */ | |
469 | static void ap_tasklet_fn(unsigned long dummy) | |
470 | { | |
bc4b295e | 471 | int bkt; |
e28d2af4 | 472 | struct ap_queue *aq; |
dc4b6ded | 473 | enum ap_sm_wait wait = AP_SM_WAIT_NONE; |
3f3007af MS |
474 | |
475 | /* Reset the indicator if interrupts are used. Thus new interrupts can | |
476 | * be received. Doing it in the beginning of the tasklet is therefor | |
477 | * important that no requests on any AP get lost. | |
478 | */ | |
cabebb69 | 479 | if (ap_irq_flag) |
3f3007af MS |
480 | xchg(ap_airq.lsi_ptr, 0); |
481 | ||
bc4b295e HF |
482 | spin_lock_bh(&ap_queues_lock); |
483 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
484 | spin_lock_bh(&aq->lock); | |
dc4b6ded | 485 | wait = min(wait, ap_sm_event_loop(aq, AP_SM_EVENT_POLL)); |
bc4b295e | 486 | spin_unlock_bh(&aq->lock); |
3f3007af | 487 | } |
bc4b295e | 488 | spin_unlock_bh(&ap_queues_lock); |
e28d2af4 IT |
489 | |
490 | ap_wait(wait); | |
af512ed0 RW |
491 | } |
492 | ||
9af3e04e MS |
493 | static int ap_pending_requests(void) |
494 | { | |
bc4b295e | 495 | int bkt; |
e28d2af4 IT |
496 | struct ap_queue *aq; |
497 | ||
bc4b295e HF |
498 | spin_lock_bh(&ap_queues_lock); |
499 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
500 | if (aq->queue_count == 0) | |
501 | continue; | |
502 | spin_unlock_bh(&ap_queues_lock); | |
503 | return 1; | |
9af3e04e | 504 | } |
bc4b295e | 505 | spin_unlock_bh(&ap_queues_lock); |
e28d2af4 | 506 | return 0; |
9af3e04e MS |
507 | } |
508 | ||
83e9d5d2 MS |
509 | /** |
510 | * ap_poll_thread(): Thread that polls for finished requests. | |
511 | * @data: Unused pointer | |
512 | * | |
513 | * AP bus poll thread. The purpose of this thread is to poll for | |
514 | * finished requests in a loop if there is a "free" cpu - that is | |
515 | * a cpu that doesn't have anything better to do. The polling stops | |
516 | * as soon as there is another task or if all messages have been | |
517 | * delivered. | |
518 | */ | |
519 | static int ap_poll_thread(void *data) | |
520 | { | |
521 | DECLARE_WAITQUEUE(wait, current); | |
83e9d5d2 MS |
522 | |
523 | set_user_nice(current, MAX_NICE); | |
524 | set_freezable(); | |
525 | while (!kthread_should_stop()) { | |
526 | add_wait_queue(&ap_poll_wait, &wait); | |
527 | set_current_state(TASK_INTERRUPTIBLE); | |
41677b1d | 528 | if (!ap_pending_requests()) { |
83e9d5d2 MS |
529 | schedule(); |
530 | try_to_freeze(); | |
531 | } | |
532 | set_current_state(TASK_RUNNING); | |
533 | remove_wait_queue(&ap_poll_wait, &wait); | |
83e9d5d2 MS |
534 | if (need_resched()) { |
535 | schedule(); | |
536 | try_to_freeze(); | |
537 | continue; | |
538 | } | |
3f3007af | 539 | ap_tasklet_fn(0); |
9af3e04e MS |
540 | } |
541 | ||
83e9d5d2 MS |
542 | return 0; |
543 | } | |
544 | ||
545 | static int ap_poll_thread_start(void) | |
546 | { | |
547 | int rc; | |
548 | ||
cabebb69 | 549 | if (ap_irq_flag || ap_poll_kthread) |
83e9d5d2 MS |
550 | return 0; |
551 | mutex_lock(&ap_poll_thread_mutex); | |
552 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
9c705206 | 553 | rc = PTR_ERR_OR_ZERO(ap_poll_kthread); |
83e9d5d2 MS |
554 | if (rc) |
555 | ap_poll_kthread = NULL; | |
556 | mutex_unlock(&ap_poll_thread_mutex); | |
557 | return rc; | |
558 | } | |
559 | ||
560 | static void ap_poll_thread_stop(void) | |
561 | { | |
562 | if (!ap_poll_kthread) | |
563 | return; | |
564 | mutex_lock(&ap_poll_thread_mutex); | |
565 | kthread_stop(ap_poll_kthread); | |
566 | ap_poll_kthread = NULL; | |
567 | mutex_unlock(&ap_poll_thread_mutex); | |
568 | } | |
569 | ||
e28d2af4 IT |
570 | #define is_card_dev(x) ((x)->parent == ap_root_device) |
571 | #define is_queue_dev(x) ((x)->parent != ap_root_device) | |
1534c382 MS |
572 | |
573 | /** | |
1749a81d FB |
574 | * ap_bus_match() |
575 | * @dev: Pointer to device | |
576 | * @drv: Pointer to device_driver | |
577 | * | |
1534c382 MS |
578 | * AP bus driver registration/unregistration. |
579 | */ | |
580 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
581 | { | |
1534c382 MS |
582 | struct ap_driver *ap_drv = to_ap_drv(drv); |
583 | struct ap_device_id *id; | |
584 | ||
1749a81d | 585 | /* |
1534c382 MS |
586 | * Compare device type of the device with the list of |
587 | * supported types of the device_driver. | |
588 | */ | |
589 | for (id = ap_drv->ids; id->match_flags; id++) { | |
e28d2af4 IT |
590 | if (is_card_dev(dev) && |
591 | id->match_flags & AP_DEVICE_ID_MATCH_CARD_TYPE && | |
592 | id->dev_type == to_ap_dev(dev)->device_type) | |
593 | return 1; | |
594 | if (is_queue_dev(dev) && | |
595 | id->match_flags & AP_DEVICE_ID_MATCH_QUEUE_TYPE && | |
596 | id->dev_type == to_ap_dev(dev)->device_type) | |
597 | return 1; | |
1534c382 MS |
598 | } |
599 | return 0; | |
600 | } | |
601 | ||
602 | /** | |
1749a81d FB |
603 | * ap_uevent(): Uevent function for AP devices. |
604 | * @dev: Pointer to device | |
605 | * @env: Pointer to kobj_uevent_env | |
606 | * | |
607 | * It sets up a single environment variable DEV_TYPE which contains the | |
608 | * hardware device type. | |
1534c382 | 609 | */ |
ac2b96f3 | 610 | static int ap_uevent(struct device *dev, struct kobj_uevent_env *env) |
1534c382 | 611 | { |
df6f508c | 612 | int rc = 0; |
1534c382 | 613 | struct ap_device *ap_dev = to_ap_dev(dev); |
1534c382 | 614 | |
837cd105 HF |
615 | /* Uevents from ap bus core don't need extensions to the env */ |
616 | if (dev == ap_root_device) | |
617 | return 0; | |
1534c382 | 618 | |
df6f508c HF |
619 | if (is_card_dev(dev)) { |
620 | struct ap_card *ac = to_ap_card(&ap_dev->device); | |
bf62456e | 621 | |
df6f508c HF |
622 | /* Set up DEV_TYPE environment variable. */ |
623 | rc = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); | |
624 | if (rc) | |
625 | return rc; | |
626 | /* Add MODALIAS= */ | |
627 | rc = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); | |
628 | if (rc) | |
629 | return rc; | |
630 | ||
631 | /* Add MODE=<accel|cca|ep11> */ | |
632 | if (ap_test_bit(&ac->functions, AP_FUNC_ACCEL)) | |
633 | rc = add_uevent_var(env, "MODE=accel"); | |
634 | else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) | |
635 | rc = add_uevent_var(env, "MODE=cca"); | |
636 | else if (ap_test_bit(&ac->functions, AP_FUNC_EP11)) | |
637 | rc = add_uevent_var(env, "MODE=ep11"); | |
638 | if (rc) | |
639 | return rc; | |
640 | } else { | |
641 | struct ap_queue *aq = to_ap_queue(&ap_dev->device); | |
642 | ||
643 | /* Add MODE=<accel|cca|ep11> */ | |
644 | if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL)) | |
645 | rc = add_uevent_var(env, "MODE=accel"); | |
646 | else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) | |
647 | rc = add_uevent_var(env, "MODE=cca"); | |
648 | else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11)) | |
649 | rc = add_uevent_var(env, "MODE=ep11"); | |
650 | if (rc) | |
651 | return rc; | |
652 | } | |
837cd105 HF |
653 | |
654 | return 0; | |
655 | } | |
656 | ||
657 | static void ap_send_init_scan_done_uevent(void) | |
658 | { | |
659 | char *envp[] = { "INITSCAN=done", NULL }; | |
660 | ||
661 | kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); | |
662 | } | |
663 | ||
664 | static void ap_send_bindings_complete_uevent(void) | |
665 | { | |
0677519a HF |
666 | char buf[32]; |
667 | char *envp[] = { "BINDINGS=complete", buf, NULL }; | |
837cd105 | 668 | |
0677519a HF |
669 | snprintf(buf, sizeof(buf), "COMPLETECOUNT=%llu", |
670 | atomic64_inc_return(&ap_bindings_complete_count)); | |
837cd105 HF |
671 | kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); |
672 | } | |
673 | ||
df6f508c HF |
674 | void ap_send_config_uevent(struct ap_device *ap_dev, bool cfg) |
675 | { | |
676 | char buf[16]; | |
677 | char *envp[] = { buf, NULL }; | |
678 | ||
679 | snprintf(buf, sizeof(buf), "CONFIG=%d", cfg ? 1 : 0); | |
680 | ||
681 | kobject_uevent_env(&ap_dev->device.kobj, KOBJ_CHANGE, envp); | |
682 | } | |
683 | EXPORT_SYMBOL(ap_send_config_uevent); | |
684 | ||
685 | void ap_send_online_uevent(struct ap_device *ap_dev, int online) | |
686 | { | |
687 | char buf[16]; | |
688 | char *envp[] = { buf, NULL }; | |
689 | ||
690 | snprintf(buf, sizeof(buf), "ONLINE=%d", online ? 1 : 0); | |
691 | ||
692 | kobject_uevent_env(&ap_dev->device.kobj, KOBJ_CHANGE, envp); | |
693 | } | |
694 | EXPORT_SYMBOL(ap_send_online_uevent); | |
695 | ||
d9b38e9d HF |
696 | static void ap_send_mask_changed_uevent(unsigned long *newapm, |
697 | unsigned long *newaqm) | |
698 | { | |
699 | char buf[100]; | |
700 | char *envp[] = { buf, NULL }; | |
701 | ||
702 | if (newapm) | |
703 | snprintf(buf, sizeof(buf), | |
704 | "APMASK=0x%016lx%016lx%016lx%016lx\n", | |
705 | newapm[0], newapm[1], newapm[2], newapm[3]); | |
706 | else | |
707 | snprintf(buf, sizeof(buf), | |
708 | "AQMASK=0x%016lx%016lx%016lx%016lx\n", | |
709 | newaqm[0], newaqm[1], newaqm[2], newaqm[3]); | |
710 | ||
711 | kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp); | |
712 | } | |
713 | ||
837cd105 HF |
714 | /* |
715 | * calc # of bound APQNs | |
716 | */ | |
717 | ||
718 | struct __ap_calc_ctrs { | |
719 | unsigned int apqns; | |
720 | unsigned int bound; | |
721 | }; | |
722 | ||
723 | static int __ap_calc_helper(struct device *dev, void *arg) | |
724 | { | |
2004b57c | 725 | struct __ap_calc_ctrs *pctrs = (struct __ap_calc_ctrs *)arg; |
837cd105 HF |
726 | |
727 | if (is_queue_dev(dev)) { | |
728 | pctrs->apqns++; | |
c8c68c5f | 729 | if (dev->driver) |
837cd105 HF |
730 | pctrs->bound++; |
731 | } | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
736 | static void ap_calc_bound_apqns(unsigned int *apqns, unsigned int *bound) | |
737 | { | |
738 | struct __ap_calc_ctrs ctrs; | |
739 | ||
740 | memset(&ctrs, 0, sizeof(ctrs)); | |
2004b57c | 741 | bus_for_each_dev(&ap_bus_type, NULL, (void *)&ctrs, __ap_calc_helper); |
bf62456e | 742 | |
837cd105 HF |
743 | *apqns = ctrs.apqns; |
744 | *bound = ctrs.bound; | |
1534c382 MS |
745 | } |
746 | ||
837cd105 HF |
747 | /* |
748 | * After initial ap bus scan do check if all existing APQNs are | |
749 | * bound to device drivers. | |
750 | */ | |
751 | static void ap_check_bindings_complete(void) | |
752 | { | |
753 | unsigned int apqns, bound; | |
754 | ||
755 | if (atomic64_read(&ap_scan_bus_count) >= 1) { | |
756 | ap_calc_bound_apqns(&apqns, &bound); | |
757 | if (bound == apqns) { | |
758 | if (!completion_done(&ap_init_apqn_bindings_complete)) { | |
759 | complete_all(&ap_init_apqn_bindings_complete); | |
3f74eb5f | 760 | AP_DBF_INFO("%s complete\n", __func__); |
837cd105 HF |
761 | } |
762 | ap_send_bindings_complete_uevent(); | |
763 | } | |
764 | } | |
765 | } | |
766 | ||
767 | /* | |
768 | * Interface to wait for the AP bus to have done one initial ap bus | |
769 | * scan and all detected APQNs have been bound to device drivers. | |
770 | * If these both conditions are not fulfilled, this function blocks | |
771 | * on a condition with wait_for_completion_interruptible_timeout(). | |
772 | * If these both conditions are fulfilled (before the timeout hits) | |
773 | * the return value is 0. If the timeout (in jiffies) hits instead | |
774 | * -ETIME is returned. On failures negative return values are | |
775 | * returned to the caller. | |
776 | */ | |
777 | int ap_wait_init_apqn_bindings_complete(unsigned long timeout) | |
778 | { | |
779 | long l; | |
780 | ||
781 | if (completion_done(&ap_init_apqn_bindings_complete)) | |
782 | return 0; | |
783 | ||
784 | if (timeout) | |
785 | l = wait_for_completion_interruptible_timeout( | |
786 | &ap_init_apqn_bindings_complete, timeout); | |
787 | else | |
788 | l = wait_for_completion_interruptible( | |
789 | &ap_init_apqn_bindings_complete); | |
790 | if (l < 0) | |
791 | return l == -ERESTARTSYS ? -EINTR : l; | |
792 | else if (l == 0 && timeout) | |
793 | return -ETIME; | |
794 | ||
795 | return 0; | |
796 | } | |
797 | EXPORT_SYMBOL(ap_wait_init_apqn_bindings_complete); | |
798 | ||
e28d2af4 | 799 | static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data) |
83e9d5d2 | 800 | { |
e28d2af4 | 801 | if (is_queue_dev(dev) && |
2004b57c | 802 | AP_QID_CARD(to_ap_queue(dev)->qid) == (int)(long)data) |
e28d2af4 | 803 | device_unregister(dev); |
83e9d5d2 MS |
804 | return 0; |
805 | } | |
806 | ||
7e0bdbe5 HF |
807 | static int __ap_revise_reserved(struct device *dev, void *dummy) |
808 | { | |
809 | int rc, card, queue, devres, drvres; | |
810 | ||
811 | if (is_queue_dev(dev)) { | |
812 | card = AP_QID_CARD(to_ap_queue(dev)->qid); | |
813 | queue = AP_QID_QUEUE(to_ap_queue(dev)->qid); | |
814 | mutex_lock(&ap_perms_mutex); | |
2004b57c HF |
815 | devres = test_bit_inv(card, ap_perms.apm) && |
816 | test_bit_inv(queue, ap_perms.aqm); | |
7e0bdbe5 HF |
817 | mutex_unlock(&ap_perms_mutex); |
818 | drvres = to_ap_drv(dev->driver)->flags | |
819 | & AP_DRIVER_FLAG_DEFAULT; | |
820 | if (!!devres != !!drvres) { | |
3f74eb5f HF |
821 | AP_DBF_DBG("%s reprobing queue=%02x.%04x\n", |
822 | __func__, card, queue); | |
7e0bdbe5 | 823 | rc = device_reprobe(dev); |
132c1e74 HF |
824 | if (rc) |
825 | AP_DBF_WARN("%s reprobing queue=%02x.%04x failed\n", | |
826 | __func__, card, queue); | |
7e0bdbe5 HF |
827 | } |
828 | } | |
829 | ||
830 | return 0; | |
831 | } | |
832 | ||
833 | static void ap_bus_revise_bindings(void) | |
834 | { | |
835 | bus_for_each_dev(&ap_bus_type, NULL, NULL, __ap_revise_reserved); | |
836 | } | |
837 | ||
838 | int ap_owned_by_def_drv(int card, int queue) | |
839 | { | |
840 | int rc = 0; | |
841 | ||
842 | if (card < 0 || card >= AP_DEVICES || queue < 0 || queue >= AP_DOMAINS) | |
843 | return -EINVAL; | |
844 | ||
845 | mutex_lock(&ap_perms_mutex); | |
846 | ||
2004b57c HF |
847 | if (test_bit_inv(card, ap_perms.apm) && |
848 | test_bit_inv(queue, ap_perms.aqm)) | |
7e0bdbe5 HF |
849 | rc = 1; |
850 | ||
851 | mutex_unlock(&ap_perms_mutex); | |
852 | ||
853 | return rc; | |
854 | } | |
855 | EXPORT_SYMBOL(ap_owned_by_def_drv); | |
856 | ||
857 | int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm, | |
858 | unsigned long *aqm) | |
859 | { | |
860 | int card, queue, rc = 0; | |
861 | ||
862 | mutex_lock(&ap_perms_mutex); | |
863 | ||
864 | for (card = 0; !rc && card < AP_DEVICES; card++) | |
865 | if (test_bit_inv(card, apm) && | |
866 | test_bit_inv(card, ap_perms.apm)) | |
867 | for (queue = 0; !rc && queue < AP_DOMAINS; queue++) | |
868 | if (test_bit_inv(queue, aqm) && | |
869 | test_bit_inv(queue, ap_perms.aqm)) | |
870 | rc = 1; | |
871 | ||
872 | mutex_unlock(&ap_perms_mutex); | |
873 | ||
874 | return rc; | |
875 | } | |
876 | EXPORT_SYMBOL(ap_apqn_in_matrix_owned_by_def_drv); | |
877 | ||
1534c382 MS |
878 | static int ap_device_probe(struct device *dev) |
879 | { | |
880 | struct ap_device *ap_dev = to_ap_dev(dev); | |
3f3007af | 881 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
29c2680f HF |
882 | int card, queue, devres, drvres, rc = -ENODEV; |
883 | ||
884 | if (!get_device(dev)) | |
885 | return rc; | |
7e0bdbe5 HF |
886 | |
887 | if (is_queue_dev(dev)) { | |
888 | /* | |
889 | * If the apqn is marked as reserved/used by ap bus and | |
890 | * default drivers, only probe with drivers with the default | |
891 | * flag set. If it is not marked, only probe with drivers | |
892 | * with the default flag not set. | |
893 | */ | |
894 | card = AP_QID_CARD(to_ap_queue(dev)->qid); | |
895 | queue = AP_QID_QUEUE(to_ap_queue(dev)->qid); | |
896 | mutex_lock(&ap_perms_mutex); | |
2004b57c HF |
897 | devres = test_bit_inv(card, ap_perms.apm) && |
898 | test_bit_inv(queue, ap_perms.aqm); | |
7e0bdbe5 HF |
899 | mutex_unlock(&ap_perms_mutex); |
900 | drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT; | |
901 | if (!!devres != !!drvres) | |
29c2680f | 902 | goto out; |
7e0bdbe5 | 903 | } |
666e68e0 | 904 | |
e3850508 | 905 | /* Add queue/card to list of active queues/cards */ |
bc4b295e HF |
906 | spin_lock_bh(&ap_queues_lock); |
907 | if (is_queue_dev(dev)) | |
908 | hash_add(ap_queues, &to_ap_queue(dev)->hnode, | |
909 | to_ap_queue(dev)->qid); | |
910 | spin_unlock_bh(&ap_queues_lock); | |
e3850508 | 911 | |
1534c382 | 912 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
e3850508 HF |
913 | |
914 | if (rc) { | |
bc4b295e HF |
915 | spin_lock_bh(&ap_queues_lock); |
916 | if (is_queue_dev(dev)) | |
917 | hash_del(&to_ap_queue(dev)->hnode); | |
918 | spin_unlock_bh(&ap_queues_lock); | |
2004b57c | 919 | } else { |
837cd105 | 920 | ap_check_bindings_complete(); |
2004b57c | 921 | } |
e3850508 | 922 | |
29c2680f HF |
923 | out: |
924 | if (rc) | |
925 | put_device(dev); | |
1534c382 MS |
926 | return rc; |
927 | } | |
928 | ||
fc7a6209 | 929 | static void ap_device_remove(struct device *dev) |
1534c382 MS |
930 | { |
931 | struct ap_device *ap_dev = to_ap_dev(dev); | |
c8c68c5f | 932 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); |
1534c382 | 933 | |
01396a37 | 934 | /* prepare ap queue device removal */ |
104f708f | 935 | if (is_queue_dev(dev)) |
01396a37 HF |
936 | ap_queue_prepare_remove(to_ap_queue(dev)); |
937 | ||
938 | /* driver's chance to clean up gracefully */ | |
e3850508 HF |
939 | if (ap_drv->remove) |
940 | ap_drv->remove(ap_dev); | |
941 | ||
01396a37 HF |
942 | /* now do the ap queue device remove */ |
943 | if (is_queue_dev(dev)) | |
944 | ap_queue_remove(to_ap_queue(dev)); | |
945 | ||
e3850508 | 946 | /* Remove queue/card from list of active queues/cards */ |
bc4b295e HF |
947 | spin_lock_bh(&ap_queues_lock); |
948 | if (is_queue_dev(dev)) | |
949 | hash_del(&to_ap_queue(dev)->hnode); | |
950 | spin_unlock_bh(&ap_queues_lock); | |
e3850508 | 951 | |
29c2680f | 952 | put_device(dev); |
1534c382 MS |
953 | } |
954 | ||
bc4b295e HF |
955 | struct ap_queue *ap_get_qdev(ap_qid_t qid) |
956 | { | |
957 | int bkt; | |
958 | struct ap_queue *aq; | |
959 | ||
960 | spin_lock_bh(&ap_queues_lock); | |
961 | hash_for_each(ap_queues, bkt, aq, hnode) { | |
962 | if (aq->qid == qid) { | |
963 | get_device(&aq->ap_dev.device); | |
964 | spin_unlock_bh(&ap_queues_lock); | |
965 | return aq; | |
966 | } | |
967 | } | |
968 | spin_unlock_bh(&ap_queues_lock); | |
969 | ||
970 | return NULL; | |
971 | } | |
972 | EXPORT_SYMBOL(ap_get_qdev); | |
973 | ||
1534c382 MS |
974 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, |
975 | char *name) | |
976 | { | |
977 | struct device_driver *drv = &ap_drv->driver; | |
978 | ||
979 | drv->bus = &ap_bus_type; | |
1534c382 MS |
980 | drv->owner = owner; |
981 | drv->name = name; | |
982 | return driver_register(drv); | |
983 | } | |
984 | EXPORT_SYMBOL(ap_driver_register); | |
985 | ||
986 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
987 | { | |
988 | driver_unregister(&ap_drv->driver); | |
989 | } | |
990 | EXPORT_SYMBOL(ap_driver_unregister); | |
991 | ||
dabecb29 HD |
992 | void ap_bus_force_rescan(void) |
993 | { | |
56bbe686 | 994 | /* processing a asynchronous bus rescan */ |
fcd0d1f6 | 995 | del_timer(&ap_config_timer); |
8139b89d MS |
996 | queue_work(system_long_wq, &ap_scan_work); |
997 | flush_work(&ap_scan_work); | |
dabecb29 HD |
998 | } |
999 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
1000 | ||
0d9c038f | 1001 | /* |
2004b57c HF |
1002 | * A config change has happened, force an ap bus rescan. |
1003 | */ | |
0d9c038f TK |
1004 | void ap_bus_cfg_chg(void) |
1005 | { | |
2ea2a609 | 1006 | AP_DBF_DBG("%s config change, forcing bus rescan\n", __func__); |
0d9c038f TK |
1007 | |
1008 | ap_bus_force_rescan(); | |
1009 | } | |
1010 | ||
1749a81d | 1011 | /* |
3d8f60d3 HF |
1012 | * hex2bitmap() - parse hex mask string and set bitmap. |
1013 | * Valid strings are "0x012345678" with at least one valid hex number. | |
1014 | * Rest of the bitmap to the right is padded with 0. No spaces allowed | |
1015 | * within the string, the leading 0x may be omitted. | |
1016 | * Returns the bitmask with exactly the bits set as given by the hex | |
1017 | * string (both in big endian order). | |
1534c382 | 1018 | */ |
7e0bdbe5 HF |
1019 | static int hex2bitmap(const char *str, unsigned long *bitmap, int bits) |
1020 | { | |
1021 | int i, n, b; | |
1022 | ||
1023 | /* bits needs to be a multiple of 8 */ | |
1024 | if (bits & 0x07) | |
1025 | return -EINVAL; | |
1026 | ||
7e0bdbe5 HF |
1027 | if (str[0] == '0' && str[1] == 'x') |
1028 | str++; | |
1029 | if (*str == 'x') | |
1030 | str++; | |
1031 | ||
1032 | for (i = 0; isxdigit(*str) && i < bits; str++) { | |
1033 | b = hex_to_bin(*str); | |
1034 | for (n = 0; n < 4; n++) | |
1035 | if (b & (0x08 >> n)) | |
1036 | set_bit_inv(i + n, bitmap); | |
1037 | i += 4; | |
1038 | } | |
1039 | ||
3d8f60d3 HF |
1040 | if (*str == '\n') |
1041 | str++; | |
1042 | if (*str) | |
1043 | return -EINVAL; | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | /* | |
fa108f95 MS |
1048 | * modify_bitmap() - parse bitmask argument and modify an existing |
1049 | * bit mask accordingly. A concatenation (done with ',') of these | |
1050 | * terms is recognized: | |
3d8f60d3 HF |
1051 | * +<bitnr>[-<bitnr>] or -<bitnr>[-<bitnr>] |
1052 | * <bitnr> may be any valid number (hex, decimal or octal) in the range | |
1053 | * 0...bits-1; the leading + or - is required. Here are some examples: | |
1054 | * +0-15,+32,-128,-0xFF | |
1055 | * -0-255,+1-16,+0x128 | |
1056 | * +1,+2,+3,+4,-5,-7-10 | |
fa108f95 MS |
1057 | * Returns the new bitmap after all changes have been applied. Every |
1058 | * positive value in the string will set a bit and every negative value | |
1059 | * in the string will clear a bit. As a bit may be touched more than once, | |
1060 | * the last 'operation' wins: | |
1061 | * +0-255,-128 = first bits 0-255 will be set, then bit 128 will be | |
1062 | * cleared again. All other bits are unmodified. | |
3d8f60d3 | 1063 | */ |
fa108f95 | 1064 | static int modify_bitmap(const char *str, unsigned long *bitmap, int bits) |
3d8f60d3 HF |
1065 | { |
1066 | int a, i, z; | |
1067 | char *np, sign; | |
1068 | ||
1069 | /* bits needs to be a multiple of 8 */ | |
1070 | if (bits & 0x07) | |
7e0bdbe5 HF |
1071 | return -EINVAL; |
1072 | ||
3d8f60d3 HF |
1073 | while (*str) { |
1074 | sign = *str++; | |
1075 | if (sign != '+' && sign != '-') | |
1076 | return -EINVAL; | |
1077 | a = z = simple_strtoul(str, &np, 0); | |
1078 | if (str == np || a >= bits) | |
1079 | return -EINVAL; | |
1080 | str = np; | |
1081 | if (*str == '-') { | |
1082 | z = simple_strtoul(++str, &np, 0); | |
1083 | if (str == np || a > z || z >= bits) | |
1084 | return -EINVAL; | |
1085 | str = np; | |
1086 | } | |
1087 | for (i = a; i <= z; i++) | |
fa108f95 MS |
1088 | if (sign == '+') |
1089 | set_bit_inv(i, bitmap); | |
1090 | else | |
1091 | clear_bit_inv(i, bitmap); | |
3d8f60d3 HF |
1092 | while (*str == ',' || *str == '\n') |
1093 | str++; | |
1094 | } | |
1095 | ||
7e0bdbe5 HF |
1096 | return 0; |
1097 | } | |
1098 | ||
4f8206b8 TK |
1099 | static int ap_parse_bitmap_str(const char *str, unsigned long *bitmap, int bits, |
1100 | unsigned long *newmap) | |
1101 | { | |
1102 | unsigned long size; | |
1103 | int rc; | |
1104 | ||
1105 | size = BITS_TO_LONGS(bits) * sizeof(unsigned long); | |
1106 | if (*str == '+' || *str == '-') { | |
1107 | memcpy(newmap, bitmap, size); | |
1108 | rc = modify_bitmap(str, newmap, bits); | |
1109 | } else { | |
1110 | memset(newmap, 0, size); | |
1111 | rc = hex2bitmap(str, newmap, bits); | |
1112 | } | |
1113 | return rc; | |
1114 | } | |
1115 | ||
00fab235 HF |
1116 | int ap_parse_mask_str(const char *str, |
1117 | unsigned long *bitmap, int bits, | |
1118 | struct mutex *lock) | |
3d8f60d3 | 1119 | { |
fa108f95 MS |
1120 | unsigned long *newmap, size; |
1121 | int rc; | |
3d8f60d3 HF |
1122 | |
1123 | /* bits needs to be a multiple of 8 */ | |
1124 | if (bits & 0x07) | |
1125 | return -EINVAL; | |
1126 | ||
2004b57c | 1127 | size = BITS_TO_LONGS(bits) * sizeof(unsigned long); |
fa108f95 MS |
1128 | newmap = kmalloc(size, GFP_KERNEL); |
1129 | if (!newmap) | |
1130 | return -ENOMEM; | |
1131 | if (mutex_lock_interruptible(lock)) { | |
1132 | kfree(newmap); | |
1133 | return -ERESTARTSYS; | |
1134 | } | |
4f8206b8 | 1135 | rc = ap_parse_bitmap_str(str, bitmap, bits, newmap); |
fa108f95 MS |
1136 | if (rc == 0) |
1137 | memcpy(bitmap, newmap, size); | |
3d8f60d3 | 1138 | mutex_unlock(lock); |
fa108f95 MS |
1139 | kfree(newmap); |
1140 | return rc; | |
3d8f60d3 | 1141 | } |
00fab235 | 1142 | EXPORT_SYMBOL(ap_parse_mask_str); |
3d8f60d3 HF |
1143 | |
1144 | /* | |
1145 | * AP bus attributes. | |
1146 | */ | |
1147 | ||
1534c382 MS |
1148 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) |
1149 | { | |
40501c70 | 1150 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); |
1534c382 MS |
1151 | } |
1152 | ||
fc1d3f02 IT |
1153 | static ssize_t ap_domain_store(struct bus_type *bus, |
1154 | const char *buf, size_t count) | |
1155 | { | |
1156 | int domain; | |
1157 | ||
1158 | if (sscanf(buf, "%i\n", &domain) != 1 || | |
7e0bdbe5 HF |
1159 | domain < 0 || domain > ap_max_domain_id || |
1160 | !test_bit_inv(domain, ap_perms.aqm)) | |
fc1d3f02 | 1161 | return -EINVAL; |
c8337c47 | 1162 | |
fc1d3f02 IT |
1163 | spin_lock_bh(&ap_domain_lock); |
1164 | ap_domain_index = domain; | |
1165 | spin_unlock_bh(&ap_domain_lock); | |
cccd85bf | 1166 | |
3f74eb5f HF |
1167 | AP_DBF_INFO("%s stored new default domain=%d\n", |
1168 | __func__, domain); | |
cccd85bf | 1169 | |
fc1d3f02 IT |
1170 | return count; |
1171 | } | |
1172 | ||
ac2b96f3 | 1173 | static BUS_ATTR_RW(ap_domain); |
1534c382 | 1174 | |
91f3e3ea IT |
1175 | static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf) |
1176 | { | |
c8337c47 | 1177 | if (!ap_qci_info) /* QCI not supported */ |
40501c70 HF |
1178 | return scnprintf(buf, PAGE_SIZE, "not supported\n"); |
1179 | ||
1180 | return scnprintf(buf, PAGE_SIZE, | |
1181 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
c8337c47 HF |
1182 | ap_qci_info->adm[0], ap_qci_info->adm[1], |
1183 | ap_qci_info->adm[2], ap_qci_info->adm[3], | |
1184 | ap_qci_info->adm[4], ap_qci_info->adm[5], | |
1185 | ap_qci_info->adm[6], ap_qci_info->adm[7]); | |
91f3e3ea IT |
1186 | } |
1187 | ||
ac2b96f3 | 1188 | static BUS_ATTR_RO(ap_control_domain_mask); |
91f3e3ea | 1189 | |
e28d2af4 IT |
1190 | static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf) |
1191 | { | |
c8337c47 | 1192 | if (!ap_qci_info) /* QCI not supported */ |
40501c70 HF |
1193 | return scnprintf(buf, PAGE_SIZE, "not supported\n"); |
1194 | ||
1195 | return scnprintf(buf, PAGE_SIZE, | |
1196 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
c8337c47 HF |
1197 | ap_qci_info->aqm[0], ap_qci_info->aqm[1], |
1198 | ap_qci_info->aqm[2], ap_qci_info->aqm[3], | |
1199 | ap_qci_info->aqm[4], ap_qci_info->aqm[5], | |
1200 | ap_qci_info->aqm[6], ap_qci_info->aqm[7]); | |
e28d2af4 IT |
1201 | } |
1202 | ||
ac2b96f3 | 1203 | static BUS_ATTR_RO(ap_usage_domain_mask); |
1534c382 | 1204 | |
aa55bf5f HF |
1205 | static ssize_t ap_adapter_mask_show(struct bus_type *bus, char *buf) |
1206 | { | |
c8337c47 | 1207 | if (!ap_qci_info) /* QCI not supported */ |
40501c70 HF |
1208 | return scnprintf(buf, PAGE_SIZE, "not supported\n"); |
1209 | ||
1210 | return scnprintf(buf, PAGE_SIZE, | |
1211 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
c8337c47 HF |
1212 | ap_qci_info->apm[0], ap_qci_info->apm[1], |
1213 | ap_qci_info->apm[2], ap_qci_info->apm[3], | |
1214 | ap_qci_info->apm[4], ap_qci_info->apm[5], | |
1215 | ap_qci_info->apm[6], ap_qci_info->apm[7]); | |
aa55bf5f HF |
1216 | } |
1217 | ||
1218 | static BUS_ATTR_RO(ap_adapter_mask); | |
1219 | ||
cb17a636 FB |
1220 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
1221 | { | |
40501c70 | 1222 | return scnprintf(buf, PAGE_SIZE, "%d\n", |
cabebb69 | 1223 | ap_irq_flag ? 1 : 0); |
cb17a636 FB |
1224 | } |
1225 | ||
ac2b96f3 HF |
1226 | static BUS_ATTR_RO(ap_interrupts); |
1227 | ||
1228 | static ssize_t config_time_show(struct bus_type *bus, char *buf) | |
1229 | { | |
40501c70 | 1230 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); |
ac2b96f3 | 1231 | } |
cb17a636 | 1232 | |
ac2b96f3 HF |
1233 | static ssize_t config_time_store(struct bus_type *bus, |
1234 | const char *buf, size_t count) | |
1534c382 MS |
1235 | { |
1236 | int time; | |
1237 | ||
1238 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1239 | return -EINVAL; | |
1240 | ap_config_time = time; | |
fcd0d1f6 | 1241 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); |
1534c382 MS |
1242 | return count; |
1243 | } | |
1244 | ||
ac2b96f3 | 1245 | static BUS_ATTR_RW(config_time); |
1534c382 | 1246 | |
ac2b96f3 | 1247 | static ssize_t poll_thread_show(struct bus_type *bus, char *buf) |
1534c382 | 1248 | { |
40501c70 | 1249 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); |
1534c382 MS |
1250 | } |
1251 | ||
ac2b96f3 HF |
1252 | static ssize_t poll_thread_store(struct bus_type *bus, |
1253 | const char *buf, size_t count) | |
1534c382 MS |
1254 | { |
1255 | int flag, rc; | |
1256 | ||
1257 | if (sscanf(buf, "%d\n", &flag) != 1) | |
1258 | return -EINVAL; | |
1259 | if (flag) { | |
1260 | rc = ap_poll_thread_start(); | |
1261 | if (rc) | |
83e9d5d2 | 1262 | count = rc; |
2004b57c | 1263 | } else { |
1534c382 | 1264 | ap_poll_thread_stop(); |
2004b57c | 1265 | } |
1534c382 MS |
1266 | return count; |
1267 | } | |
1268 | ||
ac2b96f3 | 1269 | static BUS_ATTR_RW(poll_thread); |
1534c382 | 1270 | |
fe137230 FB |
1271 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
1272 | { | |
40501c70 | 1273 | return scnprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); |
fe137230 FB |
1274 | } |
1275 | ||
1276 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
1277 | size_t count) | |
1278 | { | |
1279 | unsigned long long time; | |
1280 | ktime_t hr_time; | |
1281 | ||
1282 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
1283 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
1284 | time > 120000000000ULL) | |
fe137230 FB |
1285 | return -EINVAL; |
1286 | poll_timeout = time; | |
8b0e1953 | 1287 | hr_time = poll_timeout; |
fe137230 | 1288 | |
8cc2af7c IT |
1289 | spin_lock_bh(&ap_poll_timer_lock); |
1290 | hrtimer_cancel(&ap_poll_timer); | |
1291 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1292 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
1293 | spin_unlock_bh(&ap_poll_timer_lock); | |
1294 | ||
fe137230 FB |
1295 | return count; |
1296 | } | |
1297 | ||
ac2b96f3 | 1298 | static BUS_ATTR_RW(poll_timeout); |
fe137230 | 1299 | |
5bc334bf IT |
1300 | static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf) |
1301 | { | |
c8337c47 | 1302 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_domain_id); |
5bc334bf IT |
1303 | } |
1304 | ||
ac2b96f3 | 1305 | static BUS_ATTR_RO(ap_max_domain_id); |
5bc334bf | 1306 | |
c8337c47 HF |
1307 | static ssize_t ap_max_adapter_id_show(struct bus_type *bus, char *buf) |
1308 | { | |
1309 | return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_adapter_id); | |
1310 | } | |
1311 | ||
1312 | static BUS_ATTR_RO(ap_max_adapter_id); | |
1313 | ||
7e0bdbe5 HF |
1314 | static ssize_t apmask_show(struct bus_type *bus, char *buf) |
1315 | { | |
1316 | int rc; | |
1317 | ||
1318 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1319 | return -ERESTARTSYS; | |
40501c70 HF |
1320 | rc = scnprintf(buf, PAGE_SIZE, |
1321 | "0x%016lx%016lx%016lx%016lx\n", | |
1322 | ap_perms.apm[0], ap_perms.apm[1], | |
1323 | ap_perms.apm[2], ap_perms.apm[3]); | |
7e0bdbe5 HF |
1324 | mutex_unlock(&ap_perms_mutex); |
1325 | ||
1326 | return rc; | |
1327 | } | |
1328 | ||
4f8206b8 TK |
1329 | static int __verify_card_reservations(struct device_driver *drv, void *data) |
1330 | { | |
1331 | int rc = 0; | |
1332 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1333 | unsigned long *newapm = (unsigned long *)data; | |
1334 | ||
1335 | /* | |
1336 | * increase the driver's module refcounter to be sure it is not | |
1337 | * going away when we invoke the callback function. | |
1338 | */ | |
1339 | if (!try_module_get(drv->owner)) | |
1340 | return 0; | |
1341 | ||
1342 | if (ap_drv->in_use) { | |
1343 | rc = ap_drv->in_use(newapm, ap_perms.aqm); | |
1344 | if (rc) | |
1345 | rc = -EBUSY; | |
1346 | } | |
1347 | ||
1348 | /* release the driver's module */ | |
1349 | module_put(drv->owner); | |
1350 | ||
1351 | return rc; | |
1352 | } | |
1353 | ||
1354 | static int apmask_commit(unsigned long *newapm) | |
1355 | { | |
1356 | int rc; | |
1357 | unsigned long reserved[BITS_TO_LONGS(AP_DEVICES)]; | |
1358 | ||
1359 | /* | |
1360 | * Check if any bits in the apmask have been set which will | |
1361 | * result in queues being removed from non-default drivers | |
1362 | */ | |
1363 | if (bitmap_andnot(reserved, newapm, ap_perms.apm, AP_DEVICES)) { | |
1364 | rc = bus_for_each_drv(&ap_bus_type, NULL, reserved, | |
1365 | __verify_card_reservations); | |
1366 | if (rc) | |
1367 | return rc; | |
1368 | } | |
1369 | ||
1370 | memcpy(ap_perms.apm, newapm, APMASKSIZE); | |
1371 | ||
1372 | return 0; | |
1373 | } | |
1374 | ||
7e0bdbe5 HF |
1375 | static ssize_t apmask_store(struct bus_type *bus, const char *buf, |
1376 | size_t count) | |
1377 | { | |
d9b38e9d | 1378 | int rc, changes = 0; |
4f8206b8 TK |
1379 | DECLARE_BITMAP(newapm, AP_DEVICES); |
1380 | ||
1381 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1382 | return -ERESTARTSYS; | |
7e0bdbe5 | 1383 | |
4f8206b8 TK |
1384 | rc = ap_parse_bitmap_str(buf, ap_perms.apm, AP_DEVICES, newapm); |
1385 | if (rc) | |
1386 | goto done; | |
1387 | ||
d9b38e9d HF |
1388 | changes = memcmp(ap_perms.apm, newapm, APMASKSIZE); |
1389 | if (changes) | |
1390 | rc = apmask_commit(newapm); | |
4f8206b8 TK |
1391 | |
1392 | done: | |
1393 | mutex_unlock(&ap_perms_mutex); | |
3d8f60d3 HF |
1394 | if (rc) |
1395 | return rc; | |
7e0bdbe5 | 1396 | |
d9b38e9d HF |
1397 | if (changes) { |
1398 | ap_bus_revise_bindings(); | |
1399 | ap_send_mask_changed_uevent(newapm, NULL); | |
1400 | } | |
7e0bdbe5 HF |
1401 | |
1402 | return count; | |
1403 | } | |
1404 | ||
1405 | static BUS_ATTR_RW(apmask); | |
1406 | ||
1407 | static ssize_t aqmask_show(struct bus_type *bus, char *buf) | |
1408 | { | |
1409 | int rc; | |
1410 | ||
1411 | if (mutex_lock_interruptible(&ap_perms_mutex)) | |
1412 | return -ERESTARTSYS; | |
40501c70 HF |
1413 | rc = scnprintf(buf, PAGE_SIZE, |
1414 | "0x%016lx%016lx%016lx%016lx\n", | |
1415 | ap_perms.aqm[0], ap_perms.aqm[1], | |
1416 | ap_perms.aqm[2], ap_perms.aqm[3]); | |
7e0bdbe5 HF |
1417 | mutex_unlock(&ap_perms_mutex); |
1418 | ||
1419 | return rc; | |
1420 | } | |
1421 | ||
4f8206b8 TK |
1422 | static int __verify_queue_reservations(struct device_driver *drv, void *data) |
1423 | { | |
1424 | int rc = 0; | |
1425 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1426 | unsigned long *newaqm = (unsigned long *)data; | |
1427 | ||
1428 | /* | |
1429 | * increase the driver's module refcounter to be sure it is not | |
1430 | * going away when we invoke the callback function. | |
1431 | */ | |
1432 | if (!try_module_get(drv->owner)) | |
1433 | return 0; | |
1434 | ||
1435 | if (ap_drv->in_use) { | |
1436 | rc = ap_drv->in_use(ap_perms.apm, newaqm); | |
1437 | if (rc) | |
1438 | return -EBUSY; | |
1439 | } | |
1440 | ||
1441 | /* release the driver's module */ | |
1442 | module_put(drv->owner); | |
1443 | ||
1444 | return rc; | |
1445 | } | |
1446 | ||
1447 | static int aqmask_commit(unsigned long *newaqm) | |
1448 | { | |
1449 | int rc; | |
1450 | unsigned long reserved[BITS_TO_LONGS(AP_DOMAINS)]; | |
1451 | ||
1452 | /* | |
1453 | * Check if any bits in the aqmask have been set which will | |
1454 | * result in queues being removed from non-default drivers | |
1455 | */ | |
1456 | if (bitmap_andnot(reserved, newaqm, ap_perms.aqm, AP_DOMAINS)) { | |
1457 | rc = bus_for_each_drv(&ap_bus_type, NULL, reserved, | |
1458 | __verify_queue_reservations); | |
1459 | if (rc) | |
1460 | return rc; | |
1461 | } | |
1462 | ||
1463 | memcpy(ap_perms.aqm, newaqm, AQMASKSIZE); | |
1464 | ||
1465 | return 0; | |
1466 | } | |
1467 | ||
7e0bdbe5 HF |
1468 | static ssize_t aqmask_store(struct bus_type *bus, const char *buf, |
1469 | size_t count) | |
1470 | { | |
d9b38e9d | 1471 | int rc, changes = 0; |
4f8206b8 | 1472 | DECLARE_BITMAP(newaqm, AP_DOMAINS); |
7e0bdbe5 | 1473 | |
4f8206b8 TK |
1474 | if (mutex_lock_interruptible(&ap_perms_mutex)) |
1475 | return -ERESTARTSYS; | |
1476 | ||
1477 | rc = ap_parse_bitmap_str(buf, ap_perms.aqm, AP_DOMAINS, newaqm); | |
1478 | if (rc) | |
1479 | goto done; | |
1480 | ||
d9b38e9d HF |
1481 | changes = memcmp(ap_perms.aqm, newaqm, APMASKSIZE); |
1482 | if (changes) | |
1483 | rc = aqmask_commit(newaqm); | |
4f8206b8 TK |
1484 | |
1485 | done: | |
1486 | mutex_unlock(&ap_perms_mutex); | |
3d8f60d3 HF |
1487 | if (rc) |
1488 | return rc; | |
7e0bdbe5 | 1489 | |
d9b38e9d HF |
1490 | if (changes) { |
1491 | ap_bus_revise_bindings(); | |
1492 | ap_send_mask_changed_uevent(NULL, newaqm); | |
1493 | } | |
7e0bdbe5 HF |
1494 | |
1495 | return count; | |
1496 | } | |
1497 | ||
1498 | static BUS_ATTR_RW(aqmask); | |
1499 | ||
837cd105 HF |
1500 | static ssize_t scans_show(struct bus_type *bus, char *buf) |
1501 | { | |
1502 | return scnprintf(buf, PAGE_SIZE, "%llu\n", | |
1503 | atomic64_read(&ap_scan_bus_count)); | |
1504 | } | |
1505 | ||
8944d05f HF |
1506 | static ssize_t scans_store(struct bus_type *bus, const char *buf, |
1507 | size_t count) | |
1508 | { | |
1509 | AP_DBF_INFO("%s force AP bus rescan\n", __func__); | |
1510 | ||
1511 | ap_bus_force_rescan(); | |
1512 | ||
1513 | return count; | |
1514 | } | |
1515 | ||
1516 | static BUS_ATTR_RW(scans); | |
837cd105 HF |
1517 | |
1518 | static ssize_t bindings_show(struct bus_type *bus, char *buf) | |
1519 | { | |
1520 | int rc; | |
1521 | unsigned int apqns, n; | |
1522 | ||
1523 | ap_calc_bound_apqns(&apqns, &n); | |
1524 | if (atomic64_read(&ap_scan_bus_count) >= 1 && n == apqns) | |
1525 | rc = scnprintf(buf, PAGE_SIZE, "%u/%u (complete)\n", n, apqns); | |
1526 | else | |
1527 | rc = scnprintf(buf, PAGE_SIZE, "%u/%u\n", n, apqns); | |
1528 | ||
1529 | return rc; | |
1530 | } | |
1531 | ||
1532 | static BUS_ATTR_RO(bindings); | |
1533 | ||
8cb4c20f JW |
1534 | static struct attribute *ap_bus_attrs[] = { |
1535 | &bus_attr_ap_domain.attr, | |
1536 | &bus_attr_ap_control_domain_mask.attr, | |
1537 | &bus_attr_ap_usage_domain_mask.attr, | |
1538 | &bus_attr_ap_adapter_mask.attr, | |
1539 | &bus_attr_config_time.attr, | |
1540 | &bus_attr_poll_thread.attr, | |
1541 | &bus_attr_ap_interrupts.attr, | |
1542 | &bus_attr_poll_timeout.attr, | |
1543 | &bus_attr_ap_max_domain_id.attr, | |
1544 | &bus_attr_ap_max_adapter_id.attr, | |
1545 | &bus_attr_apmask.attr, | |
1546 | &bus_attr_aqmask.attr, | |
1547 | &bus_attr_scans.attr, | |
1548 | &bus_attr_bindings.attr, | |
fe137230 | 1549 | NULL, |
1534c382 | 1550 | }; |
8cb4c20f JW |
1551 | ATTRIBUTE_GROUPS(ap_bus); |
1552 | ||
1553 | static struct bus_type ap_bus_type = { | |
1554 | .name = "ap", | |
1555 | .bus_groups = ap_bus_groups, | |
1556 | .match = &ap_bus_match, | |
1557 | .uevent = &ap_uevent, | |
95c09f03 JW |
1558 | .probe = ap_device_probe, |
1559 | .remove = ap_device_remove, | |
8cb4c20f | 1560 | }; |
1534c382 MS |
1561 | |
1562 | /** | |
1c472d46 HP |
1563 | * ap_select_domain(): Select an AP domain if possible and we haven't |
1564 | * already done so before. | |
1534c382 | 1565 | */ |
1c472d46 | 1566 | static void ap_select_domain(void) |
1534c382 | 1567 | { |
6acbe21f | 1568 | struct ap_queue_status status; |
c8337c47 | 1569 | int card, dom; |
1534c382 | 1570 | |
1749a81d | 1571 | /* |
c8337c47 HF |
1572 | * Choose the default domain. Either the one specified with |
1573 | * the "domain=" parameter or the first domain with at least | |
1574 | * one valid APQN. | |
1534c382 | 1575 | */ |
fc1d3f02 IT |
1576 | spin_lock_bh(&ap_domain_lock); |
1577 | if (ap_domain_index >= 0) { | |
1534c382 | 1578 | /* Domain has already been selected. */ |
c8337c47 | 1579 | goto out; |
fc1d3f02 | 1580 | } |
c8337c47 HF |
1581 | for (dom = 0; dom <= ap_max_domain_id; dom++) { |
1582 | if (!ap_test_config_usage_domain(dom) || | |
1583 | !test_bit_inv(dom, ap_perms.aqm)) | |
75014550 | 1584 | continue; |
c8337c47 HF |
1585 | for (card = 0; card <= ap_max_adapter_id; card++) { |
1586 | if (!ap_test_config_card_id(card) || | |
1587 | !test_bit_inv(card, ap_perms.apm)) | |
75014550 | 1588 | continue; |
c8337c47 | 1589 | status = ap_test_queue(AP_MKQID(card, dom), |
e7fc5146 TK |
1590 | ap_apft_available(), |
1591 | NULL); | |
c8337c47 HF |
1592 | if (status.response_code == AP_RESPONSE_NORMAL) |
1593 | break; | |
1534c382 | 1594 | } |
c8337c47 HF |
1595 | if (card <= ap_max_adapter_id) |
1596 | break; | |
1534c382 | 1597 | } |
c8337c47 HF |
1598 | if (dom <= ap_max_domain_id) { |
1599 | ap_domain_index = dom; | |
2ea2a609 HF |
1600 | AP_DBF_INFO("%s new default domain is %d\n", |
1601 | __func__, ap_domain_index); | |
1534c382 | 1602 | } |
c8337c47 | 1603 | out: |
fc1d3f02 | 1604 | spin_unlock_bh(&ap_domain_lock); |
1534c382 MS |
1605 | } |
1606 | ||
9a564108 HF |
1607 | /* |
1608 | * This function checks the type and returns either 0 for not | |
1609 | * supported or the highest compatible type value (which may | |
1610 | * include the input type value). | |
1611 | */ | |
1612 | static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func) | |
1613 | { | |
1614 | int comp_type = 0; | |
1615 | ||
1616 | /* < CEX2A is not supported */ | |
2ea2a609 | 1617 | if (rawtype < AP_DEVICE_TYPE_CEX2A) { |
3f74eb5f HF |
1618 | AP_DBF_WARN("%s queue=%02x.%04x unsupported type %d\n", |
1619 | __func__, AP_QID_CARD(qid), | |
1620 | AP_QID_QUEUE(qid), rawtype); | |
9a564108 | 1621 | return 0; |
2ea2a609 | 1622 | } |
985214af HF |
1623 | /* up to CEX8 known and fully supported */ |
1624 | if (rawtype <= AP_DEVICE_TYPE_CEX8) | |
9a564108 HF |
1625 | return rawtype; |
1626 | /* | |
985214af | 1627 | * unknown new type > CEX8, check for compatibility |
9a564108 | 1628 | * to the highest known and supported type which is |
985214af | 1629 | * currently CEX8 with the help of the QACT function. |
9a564108 HF |
1630 | */ |
1631 | if (ap_qact_available()) { | |
1632 | struct ap_queue_status status; | |
56c5c683 | 1633 | union ap_qact_ap_info apinfo = {0}; |
9a564108 HF |
1634 | |
1635 | apinfo.mode = (func >> 26) & 0x07; | |
985214af | 1636 | apinfo.cat = AP_DEVICE_TYPE_CEX8; |
9a564108 | 1637 | status = ap_qact(qid, 0, &apinfo); |
2004b57c HF |
1638 | if (status.response_code == AP_RESPONSE_NORMAL && |
1639 | apinfo.cat >= AP_DEVICE_TYPE_CEX2A && | |
1640 | apinfo.cat <= AP_DEVICE_TYPE_CEX8) | |
9a564108 HF |
1641 | comp_type = apinfo.cat; |
1642 | } | |
1643 | if (!comp_type) | |
3f74eb5f HF |
1644 | AP_DBF_WARN("%s queue=%02x.%04x unable to map type %d\n", |
1645 | __func__, AP_QID_CARD(qid), | |
1646 | AP_QID_QUEUE(qid), rawtype); | |
9a564108 | 1647 | else if (comp_type != rawtype) |
3f74eb5f HF |
1648 | AP_DBF_INFO("%s queue=%02x.%04x map type %d to %d\n", |
1649 | __func__, AP_QID_CARD(qid), AP_QID_QUEUE(qid), | |
2ea2a609 | 1650 | rawtype, comp_type); |
9a564108 HF |
1651 | return comp_type; |
1652 | } | |
1653 | ||
e28d2af4 | 1654 | /* |
a7b1868a | 1655 | * Helper function to be used with bus_find_dev |
e28d2af4 | 1656 | * matches for the card device with the given id |
1534c382 | 1657 | */ |
418e3ea1 | 1658 | static int __match_card_device_with_id(struct device *dev, const void *data) |
1534c382 | 1659 | { |
2004b57c | 1660 | return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long)(void *)data; |
1534c382 MS |
1661 | } |
1662 | ||
a7b1868a HF |
1663 | /* |
1664 | * Helper function to be used with bus_find_dev | |
e28d2af4 IT |
1665 | * matches for the queue device with a given qid |
1666 | */ | |
418e3ea1 | 1667 | static int __match_queue_device_with_qid(struct device *dev, const void *data) |
e28d2af4 | 1668 | { |
2004b57c | 1669 | return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long)data; |
e28d2af4 IT |
1670 | } |
1671 | ||
b1af7528 HF |
1672 | /* |
1673 | * Helper function to be used with bus_find_dev | |
1674 | * matches any queue device with given queue id | |
1675 | */ | |
418e3ea1 | 1676 | static int __match_queue_device_with_queue_id(struct device *dev, const void *data) |
b1af7528 | 1677 | { |
2004b57c HF |
1678 | return is_queue_dev(dev) && |
1679 | AP_QID_QUEUE(to_ap_queue(dev)->qid) == (int)(long)data; | |
b1af7528 HF |
1680 | } |
1681 | ||
28391585 TK |
1682 | /* Helper function for notify_config_changed */ |
1683 | static int __drv_notify_config_changed(struct device_driver *drv, void *data) | |
1684 | { | |
1685 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1686 | ||
1687 | if (try_module_get(drv->owner)) { | |
1688 | if (ap_drv->on_config_changed) | |
1689 | ap_drv->on_config_changed(ap_qci_info, ap_qci_info_old); | |
1690 | module_put(drv->owner); | |
1691 | } | |
1692 | ||
1693 | return 0; | |
1694 | } | |
1695 | ||
1696 | /* Notify all drivers about an qci config change */ | |
1697 | static inline void notify_config_changed(void) | |
1698 | { | |
1699 | bus_for_each_drv(&ap_bus_type, NULL, NULL, | |
1700 | __drv_notify_config_changed); | |
1701 | } | |
1702 | ||
1703 | /* Helper function for notify_scan_complete */ | |
1704 | static int __drv_notify_scan_complete(struct device_driver *drv, void *data) | |
1705 | { | |
1706 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
1707 | ||
1708 | if (try_module_get(drv->owner)) { | |
1709 | if (ap_drv->on_scan_complete) | |
1710 | ap_drv->on_scan_complete(ap_qci_info, | |
1711 | ap_qci_info_old); | |
1712 | module_put(drv->owner); | |
1713 | } | |
1714 | ||
1715 | return 0; | |
1716 | } | |
1717 | ||
1718 | /* Notify all drivers about bus scan complete */ | |
1719 | static inline void notify_scan_complete(void) | |
1720 | { | |
1721 | bus_for_each_drv(&ap_bus_type, NULL, NULL, | |
1722 | __drv_notify_scan_complete); | |
1723 | } | |
1724 | ||
a7b1868a HF |
1725 | /* |
1726 | * Helper function for ap_scan_bus(). | |
4f2fcccd HF |
1727 | * Remove card device and associated queue devices. |
1728 | */ | |
1729 | static inline void ap_scan_rm_card_dev_and_queue_devs(struct ap_card *ac) | |
1730 | { | |
1731 | bus_for_each_dev(&ap_bus_type, NULL, | |
2004b57c | 1732 | (void *)(long)ac->id, |
4f2fcccd HF |
1733 | __ap_queue_devices_with_id_unregister); |
1734 | device_unregister(&ac->ap_dev.device); | |
1735 | } | |
1736 | ||
1737 | /* | |
1738 | * Helper function for ap_scan_bus(). | |
1739 | * Does the scan bus job for all the domains within | |
1740 | * a valid adapter given by an ap_card ptr. | |
e28d2af4 | 1741 | */ |
4f2fcccd | 1742 | static inline void ap_scan_domains(struct ap_card *ac) |
1534c382 | 1743 | { |
a7e701db | 1744 | bool decfg, chkstop; |
a7b1868a HF |
1745 | ap_qid_t qid; |
1746 | unsigned int func; | |
1534c382 | 1747 | struct device *dev; |
a7b1868a | 1748 | struct ap_queue *aq; |
bd39654a | 1749 | int rc, dom, depth, type, ml; |
4f2fcccd HF |
1750 | |
1751 | /* | |
1752 | * Go through the configuration for the domains and compare them | |
1753 | * to the existing queue devices. Also take care of the config | |
1754 | * and error state for the queue devices. | |
1755 | */ | |
1756 | ||
1757 | for (dom = 0; dom <= ap_max_domain_id; dom++) { | |
1758 | qid = AP_MKQID(ac->id, dom); | |
1759 | dev = bus_find_device(&ap_bus_type, NULL, | |
2004b57c | 1760 | (void *)(long)qid, |
4f2fcccd HF |
1761 | __match_queue_device_with_qid); |
1762 | aq = dev ? to_ap_queue(dev) : NULL; | |
1763 | if (!ap_test_config_usage_domain(dom)) { | |
1764 | if (dev) { | |
3f74eb5f | 1765 | AP_DBF_INFO("%s(%d,%d) not in config anymore, rm queue dev\n", |
4f2fcccd HF |
1766 | __func__, ac->id, dom); |
1767 | device_unregister(dev); | |
1768 | put_device(dev); | |
1769 | } | |
1770 | continue; | |
1771 | } | |
1772 | /* domain is valid, get info from this APQN */ | |
a7e701db HF |
1773 | if (!ap_queue_info(qid, &type, &func, &depth, |
1774 | &ml, &decfg, &chkstop)) { | |
4f2fcccd | 1775 | if (aq) { |
3f74eb5f HF |
1776 | AP_DBF_INFO("%s(%d,%d) queue_info() failed, rm queue dev\n", |
1777 | __func__, ac->id, dom); | |
4f2fcccd HF |
1778 | device_unregister(dev); |
1779 | put_device(dev); | |
1780 | } | |
1781 | continue; | |
1782 | } | |
1783 | /* if no queue device exists, create a new one */ | |
1784 | if (!aq) { | |
1785 | aq = ap_queue_create(qid, ac->ap_dev.device_type); | |
1786 | if (!aq) { | |
1787 | AP_DBF_WARN("%s(%d,%d) ap_queue_create() failed\n", | |
1788 | __func__, ac->id, dom); | |
1789 | continue; | |
1790 | } | |
1791 | aq->card = ac; | |
1792 | aq->config = !decfg; | |
a7e701db | 1793 | aq->chkstop = chkstop; |
4f2fcccd HF |
1794 | dev = &aq->ap_dev.device; |
1795 | dev->bus = &ap_bus_type; | |
1796 | dev->parent = &ac->ap_dev.device; | |
1797 | dev_set_name(dev, "%02x.%04x", ac->id, dom); | |
1798 | /* register queue device */ | |
1799 | rc = device_register(dev); | |
1800 | if (rc) { | |
1801 | AP_DBF_WARN("%s(%d,%d) device_register() failed\n", | |
1802 | __func__, ac->id, dom); | |
1803 | goto put_dev_and_continue; | |
1804 | } | |
29c2680f HF |
1805 | /* get it and thus adjust reference counter */ |
1806 | get_device(dev); | |
4f2fcccd | 1807 | if (decfg) |
3f74eb5f | 1808 | AP_DBF_INFO("%s(%d,%d) new (decfg) queue dev created\n", |
4f2fcccd | 1809 | __func__, ac->id, dom); |
a7e701db HF |
1810 | else if (chkstop) |
1811 | AP_DBF_INFO("%s(%d,%d) new (chkstop) queue dev created\n", | |
1812 | __func__, ac->id, dom); | |
4f2fcccd | 1813 | else |
3f74eb5f | 1814 | AP_DBF_INFO("%s(%d,%d) new queue dev created\n", |
4f2fcccd HF |
1815 | __func__, ac->id, dom); |
1816 | goto put_dev_and_continue; | |
1817 | } | |
a7e701db | 1818 | /* handle state changes on already existing queue device */ |
4f2fcccd | 1819 | spin_lock_bh(&aq->lock); |
a7e701db HF |
1820 | /* checkstop state */ |
1821 | if (chkstop && !aq->chkstop) { | |
1822 | /* checkstop on */ | |
1823 | aq->chkstop = true; | |
1824 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1825 | aq->dev_state = AP_DEV_STATE_ERROR; | |
1826 | aq->last_err_rc = AP_RESPONSE_CHECKSTOPPED; | |
1827 | } | |
1828 | spin_unlock_bh(&aq->lock); | |
1829 | AP_DBF_DBG("%s(%d,%d) queue dev checkstop on\n", | |
1830 | __func__, ac->id, dom); | |
1831 | /* 'receive' pending messages with -EAGAIN */ | |
1832 | ap_flush_queue(aq); | |
1833 | goto put_dev_and_continue; | |
1834 | } else if (!chkstop && aq->chkstop) { | |
1835 | /* checkstop off */ | |
1836 | aq->chkstop = false; | |
1837 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1838 | aq->dev_state = AP_DEV_STATE_OPERATING; | |
1839 | aq->sm_state = AP_SM_STATE_RESET_START; | |
1840 | } | |
1841 | spin_unlock_bh(&aq->lock); | |
1842 | AP_DBF_DBG("%s(%d,%d) queue dev checkstop off\n", | |
1843 | __func__, ac->id, dom); | |
1844 | goto put_dev_and_continue; | |
1845 | } | |
1846 | /* config state change */ | |
4f2fcccd HF |
1847 | if (decfg && aq->config) { |
1848 | /* config off this queue device */ | |
1849 | aq->config = false; | |
1850 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1851 | aq->dev_state = AP_DEV_STATE_ERROR; | |
1852 | aq->last_err_rc = AP_RESPONSE_DECONFIGURED; | |
1853 | } | |
1854 | spin_unlock_bh(&aq->lock); | |
a7e701db HF |
1855 | AP_DBF_DBG("%s(%d,%d) queue dev config off\n", |
1856 | __func__, ac->id, dom); | |
df6f508c | 1857 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
4f2fcccd HF |
1858 | /* 'receive' pending messages with -EAGAIN */ |
1859 | ap_flush_queue(aq); | |
1860 | goto put_dev_and_continue; | |
a7e701db | 1861 | } else if (!decfg && !aq->config) { |
4f2fcccd HF |
1862 | /* config on this queue device */ |
1863 | aq->config = true; | |
1864 | if (aq->dev_state > AP_DEV_STATE_UNINITIATED) { | |
1865 | aq->dev_state = AP_DEV_STATE_OPERATING; | |
1866 | aq->sm_state = AP_SM_STATE_RESET_START; | |
1867 | } | |
1868 | spin_unlock_bh(&aq->lock); | |
a7e701db HF |
1869 | AP_DBF_DBG("%s(%d,%d) queue dev config on\n", |
1870 | __func__, ac->id, dom); | |
df6f508c | 1871 | ap_send_config_uevent(&aq->ap_dev, aq->config); |
4f2fcccd HF |
1872 | goto put_dev_and_continue; |
1873 | } | |
1874 | /* handle other error states */ | |
1875 | if (!decfg && aq->dev_state == AP_DEV_STATE_ERROR) { | |
1876 | spin_unlock_bh(&aq->lock); | |
1877 | /* 'receive' pending messages with -EAGAIN */ | |
1878 | ap_flush_queue(aq); | |
1879 | /* re-init (with reset) the queue device */ | |
1880 | ap_queue_init_state(aq); | |
3f74eb5f | 1881 | AP_DBF_INFO("%s(%d,%d) queue dev reinit enforced\n", |
4f2fcccd HF |
1882 | __func__, ac->id, dom); |
1883 | goto put_dev_and_continue; | |
1884 | } | |
1885 | spin_unlock_bh(&aq->lock); | |
1886 | put_dev_and_continue: | |
1887 | put_device(dev); | |
1888 | } | |
1889 | } | |
1890 | ||
1891 | /* | |
1892 | * Helper function for ap_scan_bus(). | |
1893 | * Does the scan bus job for the given adapter id. | |
1894 | */ | |
1895 | static inline void ap_scan_adapter(int ap) | |
1896 | { | |
a7e701db | 1897 | bool decfg, chkstop; |
4f2fcccd HF |
1898 | ap_qid_t qid; |
1899 | unsigned int func; | |
1900 | struct device *dev; | |
1901 | struct ap_card *ac; | |
bd39654a | 1902 | int rc, dom, depth, type, comp_type, ml; |
a7b1868a | 1903 | |
4f2fcccd | 1904 | /* Is there currently a card device for this adapter ? */ |
a7b1868a | 1905 | dev = bus_find_device(&ap_bus_type, NULL, |
2004b57c | 1906 | (void *)(long)ap, |
a7b1868a HF |
1907 | __match_card_device_with_id); |
1908 | ac = dev ? to_ap_card(dev) : NULL; | |
4f2fcccd HF |
1909 | |
1910 | /* Adapter not in configuration ? */ | |
1911 | if (!ap_test_config_card_id(ap)) { | |
1912 | if (ac) { | |
3f74eb5f | 1913 | AP_DBF_INFO("%s(%d) ap not in config any more, rm card and queue devs\n", |
4f2fcccd HF |
1914 | __func__, ap); |
1915 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
a7b1868a HF |
1916 | put_device(dev); |
1917 | } | |
1918 | return; | |
1919 | } | |
cccd85bf | 1920 | |
a7b1868a | 1921 | /* |
4f2fcccd HF |
1922 | * Adapter ap is valid in the current configuration. So do some checks: |
1923 | * If no card device exists, build one. If a card device exists, check | |
1924 | * for type and functions changed. For all this we need to find a valid | |
1925 | * APQN first. | |
a7b1868a | 1926 | */ |
4f2fcccd HF |
1927 | |
1928 | for (dom = 0; dom <= ap_max_domain_id; dom++) | |
1929 | if (ap_test_config_usage_domain(dom)) { | |
1930 | qid = AP_MKQID(ap, dom); | |
a7e701db HF |
1931 | if (ap_queue_info(qid, &type, &func, &depth, |
1932 | &ml, &decfg, &chkstop)) | |
a7b1868a HF |
1933 | break; |
1934 | } | |
4f2fcccd HF |
1935 | if (dom > ap_max_domain_id) { |
1936 | /* Could not find a valid APQN for this adapter */ | |
1937 | if (ac) { | |
3f74eb5f HF |
1938 | AP_DBF_INFO("%s(%d) no type info (no APQN found), rm card and queue devs\n", |
1939 | __func__, ap); | |
4f2fcccd HF |
1940 | ap_scan_rm_card_dev_and_queue_devs(ac); |
1941 | put_device(dev); | |
1942 | } else { | |
1943 | AP_DBF_DBG("%s(%d) no type info (no APQN found), ignored\n", | |
1944 | __func__, ap); | |
a7b1868a | 1945 | } |
4f2fcccd HF |
1946 | return; |
1947 | } | |
1948 | if (!type) { | |
1949 | /* No apdater type info available, an unusable adapter */ | |
1950 | if (ac) { | |
3f74eb5f | 1951 | AP_DBF_INFO("%s(%d) no valid type (0) info, rm card and queue devs\n", |
4f2fcccd HF |
1952 | __func__, ap); |
1953 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
a7b1868a | 1954 | put_device(dev); |
4f2fcccd HF |
1955 | } else { |
1956 | AP_DBF_DBG("%s(%d) no valid type (0) info, ignored\n", | |
1957 | __func__, ap); | |
a7b1868a | 1958 | } |
4f2fcccd | 1959 | return; |
a7b1868a | 1960 | } |
889875a1 | 1961 | |
4f2fcccd HF |
1962 | if (ac) { |
1963 | /* Check APQN against existing card device for changes */ | |
1964 | if (ac->raw_hwtype != type) { | |
3f74eb5f | 1965 | AP_DBF_INFO("%s(%d) hwtype %d changed, rm card and queue devs\n", |
4f2fcccd HF |
1966 | __func__, ap, type); |
1967 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
1968 | put_device(dev); | |
1969 | ac = NULL; | |
1970 | } else if (ac->functions != func) { | |
3f74eb5f | 1971 | AP_DBF_INFO("%s(%d) functions 0x%08x changed, rm card and queue devs\n", |
4f2fcccd HF |
1972 | __func__, ap, type); |
1973 | ap_scan_rm_card_dev_and_queue_devs(ac); | |
1974 | put_device(dev); | |
1975 | ac = NULL; | |
1976 | } else { | |
a7e701db HF |
1977 | /* handle checkstop state change */ |
1978 | if (chkstop && !ac->chkstop) { | |
1979 | /* checkstop on */ | |
1980 | ac->chkstop = true; | |
1981 | AP_DBF_INFO("%s(%d) card dev checkstop on\n", | |
1982 | __func__, ap); | |
1983 | } else if (!chkstop && ac->chkstop) { | |
1984 | /* checkstop off */ | |
1985 | ac->chkstop = false; | |
1986 | AP_DBF_INFO("%s(%d) card dev checkstop off\n", | |
1987 | __func__, ap); | |
1988 | } | |
1989 | /* handle config state change */ | |
4f2fcccd HF |
1990 | if (decfg && ac->config) { |
1991 | ac->config = false; | |
3f74eb5f | 1992 | AP_DBF_INFO("%s(%d) card dev config off\n", |
4f2fcccd | 1993 | __func__, ap); |
df6f508c | 1994 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
a7e701db | 1995 | } else if (!decfg && !ac->config) { |
4f2fcccd | 1996 | ac->config = true; |
3f74eb5f | 1997 | AP_DBF_INFO("%s(%d) card dev config on\n", |
4f2fcccd | 1998 | __func__, ap); |
df6f508c | 1999 | ap_send_config_uevent(&ac->ap_dev, ac->config); |
b1af7528 | 2000 | } |
a7b1868a | 2001 | } |
4f2fcccd HF |
2002 | } |
2003 | ||
2004 | if (!ac) { | |
2005 | /* Build a new card device */ | |
a7b1868a | 2006 | comp_type = ap_get_compatible_type(qid, type, func); |
4f2fcccd HF |
2007 | if (!comp_type) { |
2008 | AP_DBF_WARN("%s(%d) type %d, can't get compatibility type\n", | |
2009 | __func__, ap, type); | |
2010 | return; | |
2011 | } | |
bd39654a | 2012 | ac = ap_card_create(ap, depth, type, comp_type, func, ml); |
a7b1868a | 2013 | if (!ac) { |
4f2fcccd HF |
2014 | AP_DBF_WARN("%s(%d) ap_card_create() failed\n", |
2015 | __func__, ap); | |
2016 | return; | |
a7b1868a | 2017 | } |
4f2fcccd | 2018 | ac->config = !decfg; |
a7e701db | 2019 | ac->chkstop = chkstop; |
4f2fcccd HF |
2020 | dev = &ac->ap_dev.device; |
2021 | dev->bus = &ap_bus_type; | |
2022 | dev->parent = ap_root_device; | |
2023 | dev_set_name(dev, "card%02x", ap); | |
bd39654a HF |
2024 | /* maybe enlarge ap_max_msg_size to support this card */ |
2025 | if (ac->maxmsgsize > atomic_read(&ap_max_msg_size)) { | |
2026 | atomic_set(&ap_max_msg_size, ac->maxmsgsize); | |
2027 | AP_DBF_INFO("%s(%d) ap_max_msg_size update to %d byte\n", | |
3f74eb5f HF |
2028 | __func__, ap, |
2029 | atomic_read(&ap_max_msg_size)); | |
bd39654a | 2030 | } |
4f2fcccd HF |
2031 | /* Register the new card device with AP bus */ |
2032 | rc = device_register(dev); | |
a7b1868a | 2033 | if (rc) { |
4f2fcccd HF |
2034 | AP_DBF_WARN("%s(%d) device_register() failed\n", |
2035 | __func__, ap); | |
2036 | put_device(dev); | |
2037 | return; | |
3f3007af | 2038 | } |
4f2fcccd HF |
2039 | /* get it and thus adjust reference counter */ |
2040 | get_device(dev); | |
2041 | if (decfg) | |
3f74eb5f | 2042 | AP_DBF_INFO("%s(%d) new (decfg) card dev type=%d func=0x%08x created\n", |
4f2fcccd | 2043 | __func__, ap, type, func); |
a7e701db HF |
2044 | else if (chkstop) |
2045 | AP_DBF_INFO("%s(%d) new (chkstop) card dev type=%d func=0x%08x created\n", | |
2046 | __func__, ap, type, func); | |
4f2fcccd | 2047 | else |
3f74eb5f | 2048 | AP_DBF_INFO("%s(%d) new card dev type=%d func=0x%08x created\n", |
4f2fcccd HF |
2049 | __func__, ap, type, func); |
2050 | } | |
2051 | ||
2052 | /* Verify the domains and the queue devices for this card */ | |
2053 | ap_scan_domains(ac); | |
a7b1868a | 2054 | |
4f2fcccd HF |
2055 | /* release the card device */ |
2056 | put_device(&ac->ap_dev.device); | |
a7b1868a | 2057 | } |
ac994e80 | 2058 | |
28391585 TK |
2059 | /** |
2060 | * ap_get_configuration - get the host AP configuration | |
2061 | * | |
2062 | * Stores the host AP configuration information returned from the previous call | |
2063 | * to Query Configuration Information (QCI), then retrieves and stores the | |
2064 | * current AP configuration returned from QCI. | |
2065 | * | |
2066 | * Return: true if the host AP configuration changed between calls to QCI; | |
2067 | * otherwise, return false. | |
2068 | */ | |
2069 | static bool ap_get_configuration(void) | |
2070 | { | |
2071 | memcpy(ap_qci_info_old, ap_qci_info, sizeof(*ap_qci_info)); | |
2072 | ap_fetch_qci_info(ap_qci_info); | |
2073 | ||
2074 | return memcmp(ap_qci_info, ap_qci_info_old, | |
2075 | sizeof(struct ap_config_info)) != 0; | |
2076 | } | |
2077 | ||
a7b1868a HF |
2078 | /** |
2079 | * ap_scan_bus(): Scan the AP bus for new devices | |
2080 | * Runs periodically, workqueue timer (ap_config_time) | |
948e5055 | 2081 | * @unused: Unused pointer. |
a7b1868a HF |
2082 | */ |
2083 | static void ap_scan_bus(struct work_struct *unused) | |
2084 | { | |
28391585 | 2085 | int ap, config_changed = 0; |
a7b1868a | 2086 | |
28391585 TK |
2087 | /* config change notify */ |
2088 | config_changed = ap_get_configuration(); | |
2089 | if (config_changed) | |
2090 | notify_config_changed(); | |
a7b1868a HF |
2091 | ap_select_domain(); |
2092 | ||
2ea2a609 | 2093 | AP_DBF_DBG("%s running\n", __func__); |
c8337c47 | 2094 | |
a7b1868a | 2095 | /* loop over all possible adapters */ |
4f2fcccd HF |
2096 | for (ap = 0; ap <= ap_max_adapter_id; ap++) |
2097 | ap_scan_adapter(ap); | |
a7b1868a | 2098 | |
28391585 TK |
2099 | /* scan complete notify */ |
2100 | if (config_changed) | |
2101 | notify_scan_complete(); | |
2102 | ||
a7b1868a HF |
2103 | /* check if there is at least one queue available with default domain */ |
2104 | if (ap_domain_index >= 0) { | |
2105 | struct device *dev = | |
2106 | bus_find_device(&ap_bus_type, NULL, | |
2004b57c | 2107 | (void *)(long)ap_domain_index, |
b1af7528 | 2108 | __match_queue_device_with_queue_id); |
a7b1868a HF |
2109 | if (dev) |
2110 | put_device(dev); | |
2111 | else | |
3f74eb5f HF |
2112 | AP_DBF_INFO("%s no queue device with default domain %d available\n", |
2113 | __func__, ap_domain_index); | |
a7b1868a | 2114 | } |
ac994e80 | 2115 | |
837cd105 | 2116 | if (atomic64_inc_return(&ap_scan_bus_count) == 1) { |
3f74eb5f | 2117 | AP_DBF_DBG("%s init scan complete\n", __func__); |
837cd105 HF |
2118 | ap_send_init_scan_done_uevent(); |
2119 | ap_check_bindings_complete(); | |
2120 | } | |
2121 | ||
fcd0d1f6 | 2122 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); |
1534c382 MS |
2123 | } |
2124 | ||
cefbeb5d | 2125 | static void ap_config_timeout(struct timer_list *unused) |
1534c382 | 2126 | { |
8139b89d | 2127 | queue_work(system_long_wq, &ap_scan_work); |
1534c382 | 2128 | } |
13e742ba | 2129 | |
efda7ade | 2130 | static int __init ap_debug_init(void) |
cccd85bf | 2131 | { |
3f74eb5f | 2132 | ap_dbf_info = debug_register("ap", 2, 1, |
cccd85bf HF |
2133 | DBF_MAX_SPRINTF_ARGS * sizeof(long)); |
2134 | debug_register_view(ap_dbf_info, &debug_sprintf_view); | |
2135 | debug_set_level(ap_dbf_info, DBF_ERR); | |
2136 | ||
2137 | return 0; | |
2138 | } | |
2139 | ||
7e0bdbe5 HF |
2140 | static void __init ap_perms_init(void) |
2141 | { | |
2004b57c | 2142 | /* all resources usable if no kernel parameter string given */ |
00fab235 | 2143 | memset(&ap_perms.ioctlm, 0xFF, sizeof(ap_perms.ioctlm)); |
7e0bdbe5 HF |
2144 | memset(&ap_perms.apm, 0xFF, sizeof(ap_perms.apm)); |
2145 | memset(&ap_perms.aqm, 0xFF, sizeof(ap_perms.aqm)); | |
2146 | ||
3d8f60d3 | 2147 | /* apm kernel parameter string */ |
7e0bdbe5 | 2148 | if (apm_str) { |
3d8f60d3 | 2149 | memset(&ap_perms.apm, 0, sizeof(ap_perms.apm)); |
00fab235 HF |
2150 | ap_parse_mask_str(apm_str, ap_perms.apm, AP_DEVICES, |
2151 | &ap_perms_mutex); | |
7e0bdbe5 | 2152 | } |
7e0bdbe5 | 2153 | |
3d8f60d3 HF |
2154 | /* aqm kernel parameter string */ |
2155 | if (aqm_str) { | |
2156 | memset(&ap_perms.aqm, 0, sizeof(ap_perms.aqm)); | |
00fab235 HF |
2157 | ap_parse_mask_str(aqm_str, ap_perms.aqm, AP_DOMAINS, |
2158 | &ap_perms_mutex); | |
7e0bdbe5 HF |
2159 | } |
2160 | } | |
2161 | ||
1534c382 | 2162 | /** |
1749a81d FB |
2163 | * ap_module_init(): The module initialization code. |
2164 | * | |
2165 | * Initializes the module. | |
1534c382 | 2166 | */ |
efda7ade | 2167 | static int __init ap_module_init(void) |
1534c382 | 2168 | { |
8cb4c20f | 2169 | int rc; |
1534c382 | 2170 | |
cccd85bf HF |
2171 | rc = ap_debug_init(); |
2172 | if (rc) | |
2173 | return rc; | |
2174 | ||
2395103b | 2175 | if (!ap_instructions_available()) { |
889875a1 MS |
2176 | pr_warn("The hardware system does not support AP instructions\n"); |
2177 | return -ENODEV; | |
2178 | } | |
2179 | ||
bc4b295e HF |
2180 | /* init ap_queue hashtable */ |
2181 | hash_init(ap_queues); | |
2182 | ||
00fab235 | 2183 | /* set up the AP permissions (ioctls, ap and aq masks) */ |
7e0bdbe5 HF |
2184 | ap_perms_init(); |
2185 | ||
889875a1 | 2186 | /* Get AP configuration data if available */ |
c8337c47 HF |
2187 | ap_init_qci_info(); |
2188 | ||
2189 | /* check default domain setting */ | |
2190 | if (ap_domain_index < -1 || ap_domain_index > ap_max_domain_id || | |
7e0bdbe5 HF |
2191 | (ap_domain_index >= 0 && |
2192 | !test_bit_inv(ap_domain_index, ap_perms.aqm))) { | |
889875a1 MS |
2193 | pr_warn("%d is not a valid cryptographic domain\n", |
2194 | ap_domain_index); | |
ac994e80 | 2195 | ap_domain_index = -1; |
1534c382 | 2196 | } |
5314af69 | 2197 | |
c8337c47 | 2198 | /* enable interrupts if available */ |
d0982725 | 2199 | if (ap_interrupts_available() && ap_useirq) { |
f4eae94f | 2200 | rc = register_adapter_interrupt(&ap_airq); |
cabebb69 | 2201 | ap_irq_flag = (rc == 0); |
cb17a636 FB |
2202 | } |
2203 | ||
1534c382 MS |
2204 | /* Create /sys/bus/ap. */ |
2205 | rc = bus_register(&ap_bus_type); | |
2206 | if (rc) | |
2207 | goto out; | |
1534c382 MS |
2208 | |
2209 | /* Create /sys/devices/ap. */ | |
035da16f | 2210 | ap_root_device = root_device_register("ap"); |
9c705206 | 2211 | rc = PTR_ERR_OR_ZERO(ap_root_device); |
1534c382 MS |
2212 | if (rc) |
2213 | goto out_bus; | |
837cd105 | 2214 | ap_root_device->bus = &ap_bus_type; |
1534c382 | 2215 | |
1749a81d | 2216 | /* Setup the AP bus rescan timer. */ |
cefbeb5d | 2217 | timer_setup(&ap_config_timer, ap_config_timeout, 0); |
1534c382 | 2218 | |
3f3007af MS |
2219 | /* |
2220 | * Setup the high resultion poll timer. | |
fe137230 FB |
2221 | * If we are running under z/VM adjust polling to z/VM polling rate. |
2222 | */ | |
2223 | if (MACHINE_IS_VM) | |
2224 | poll_timeout = 1500000; | |
2225 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); | |
2226 | ap_poll_timer.function = ap_poll_timeout; | |
2227 | ||
1534c382 MS |
2228 | /* Start the low priority AP bus poll thread. */ |
2229 | if (ap_thread_flag) { | |
2230 | rc = ap_poll_thread_start(); | |
2231 | if (rc) | |
2232 | goto out_work; | |
2233 | } | |
2234 | ||
8139b89d | 2235 | queue_work(system_long_wq, &ap_scan_work); |
3f3007af | 2236 | |
1534c382 MS |
2237 | return 0; |
2238 | ||
2239 | out_work: | |
fe137230 | 2240 | hrtimer_cancel(&ap_poll_timer); |
035da16f | 2241 | root_device_unregister(ap_root_device); |
1534c382 | 2242 | out_bus: |
1534c382 MS |
2243 | bus_unregister(&ap_bus_type); |
2244 | out: | |
cabebb69 | 2245 | if (ap_irq_flag) |
f4eae94f | 2246 | unregister_adapter_interrupt(&ap_airq); |
c8337c47 | 2247 | kfree(ap_qci_info); |
1534c382 MS |
2248 | return rc; |
2249 | } | |
50a0d46c | 2250 | device_initcall(ap_module_init); |