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1534c382 | 1 | /* |
75014550 | 2 | * Copyright IBM Corp. 2006, 2012 |
1534c382 MS |
3 | * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> |
4 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
5 | * Ralph Wuerthner <rwuerthn@de.ibm.com> | |
cb17a636 | 6 | * Felix Beck <felix.beck@de.ibm.com> |
6bed05bc | 7 | * Holger Dengler <hd@linux.vnet.ibm.com> |
1534c382 MS |
8 | * |
9 | * Adjunct processor bus. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2, or (at your option) | |
14 | * any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
136f7a1c MS |
26 | #define KMSG_COMPONENT "ap" |
27 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
28 | ||
62d146ff | 29 | #include <linux/kernel_stat.h> |
1534c382 MS |
30 | #include <linux/module.h> |
31 | #include <linux/init.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/err.h> | |
34 | #include <linux/interrupt.h> | |
35 | #include <linux/workqueue.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
1534c382 MS |
37 | #include <linux/notifier.h> |
38 | #include <linux/kthread.h> | |
39 | #include <linux/mutex.h> | |
85eca850 | 40 | #include <asm/reset.h> |
cb17a636 | 41 | #include <asm/airq.h> |
60063497 | 42 | #include <linux/atomic.h> |
cb17a636 | 43 | #include <asm/isc.h> |
fe137230 FB |
44 | #include <linux/hrtimer.h> |
45 | #include <linux/ktime.h> | |
a0616cde | 46 | #include <asm/facility.h> |
5d26a105 | 47 | #include <linux/crypto.h> |
1534c382 MS |
48 | |
49 | #include "ap_bus.h" | |
50 | ||
51 | /* Some prototypes. */ | |
4927b3f7 | 52 | static void ap_scan_bus(struct work_struct *); |
1534c382 | 53 | static void ap_poll_all(unsigned long); |
fe137230 | 54 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *); |
1534c382 MS |
55 | static int ap_poll_thread_start(void); |
56 | static void ap_poll_thread_stop(void); | |
af512ed0 | 57 | static void ap_request_timeout(unsigned long); |
cb17a636 | 58 | static inline void ap_schedule_poll_timer(void); |
772f5472 FB |
59 | static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags); |
60 | static int ap_device_remove(struct device *dev); | |
61 | static int ap_device_probe(struct device *dev); | |
f4eae94f | 62 | static void ap_interrupt_handler(struct airq_struct *airq); |
c50a160c | 63 | static void ap_reset(struct ap_device *ap_dev, unsigned long *flags); |
772f5472 | 64 | static void ap_config_timeout(unsigned long ptr); |
5314af69 | 65 | static int ap_select_domain(void); |
1534c382 | 66 | |
1749a81d | 67 | /* |
1534c382 MS |
68 | * Module description. |
69 | */ | |
70 | MODULE_AUTHOR("IBM Corporation"); | |
75014550 HD |
71 | MODULE_DESCRIPTION("Adjunct Processor Bus driver, " \ |
72 | "Copyright IBM Corp. 2006, 2012"); | |
1534c382 | 73 | MODULE_LICENSE("GPL"); |
5d26a105 | 74 | MODULE_ALIAS_CRYPTO("z90crypt"); |
1534c382 | 75 | |
1749a81d | 76 | /* |
1534c382 MS |
77 | * Module parameter |
78 | */ | |
79 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ | |
c1a42f49 | 80 | module_param_named(domain, ap_domain_index, int, S_IRUSR|S_IRGRP); |
1534c382 MS |
81 | MODULE_PARM_DESC(domain, "domain index for ap devices"); |
82 | EXPORT_SYMBOL(ap_domain_index); | |
83 | ||
b90b34c6 | 84 | static int ap_thread_flag = 0; |
c1a42f49 | 85 | module_param_named(poll_thread, ap_thread_flag, int, S_IRUSR|S_IRGRP); |
b90b34c6 | 86 | MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)."); |
1534c382 MS |
87 | |
88 | static struct device *ap_root_device = NULL; | |
75014550 | 89 | static struct ap_config_info *ap_configuration; |
43c207e6 | 90 | static DEFINE_SPINLOCK(ap_device_list_lock); |
cf352ce0 | 91 | static LIST_HEAD(ap_device_list); |
1534c382 | 92 | |
1749a81d | 93 | /* |
1534c382 MS |
94 | * Workqueue & timer for bus rescan. |
95 | */ | |
96 | static struct workqueue_struct *ap_work_queue; | |
97 | static struct timer_list ap_config_timer; | |
98 | static int ap_config_time = AP_CONFIG_TIME; | |
4927b3f7 | 99 | static DECLARE_WORK(ap_config_work, ap_scan_bus); |
1534c382 | 100 | |
1749a81d | 101 | /* |
cb17a636 | 102 | * Tasklet & timer for AP request polling and interrupts |
1534c382 | 103 | */ |
1534c382 MS |
104 | static DECLARE_TASKLET(ap_tasklet, ap_poll_all, 0); |
105 | static atomic_t ap_poll_requests = ATOMIC_INIT(0); | |
106 | static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait); | |
107 | static struct task_struct *ap_poll_kthread = NULL; | |
108 | static DEFINE_MUTEX(ap_poll_thread_mutex); | |
93521314 | 109 | static DEFINE_SPINLOCK(ap_poll_timer_lock); |
fe137230 FB |
110 | static struct hrtimer ap_poll_timer; |
111 | /* In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds. | |
112 | * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling.*/ | |
113 | static unsigned long long poll_timeout = 250000; | |
1534c382 | 114 | |
772f5472 FB |
115 | /* Suspend flag */ |
116 | static int ap_suspend_flag; | |
889875a1 MS |
117 | /* Maximum domain id */ |
118 | static int ap_max_domain_id; | |
5314af69 FB |
119 | /* Flag to check if domain was set through module parameter domain=. This is |
120 | * important when supsend and resume is done in a z/VM environment where the | |
121 | * domain might change. */ | |
122 | static int user_set_domain = 0; | |
772f5472 FB |
123 | static struct bus_type ap_bus_type; |
124 | ||
f4eae94f MS |
125 | /* Adapter interrupt definitions */ |
126 | static int ap_airq_flag; | |
127 | ||
128 | static struct airq_struct ap_airq = { | |
129 | .handler = ap_interrupt_handler, | |
130 | .isc = AP_ISC, | |
131 | }; | |
132 | ||
cb17a636 FB |
133 | /** |
134 | * ap_using_interrupts() - Returns non-zero if interrupt support is | |
135 | * available. | |
136 | */ | |
137 | static inline int ap_using_interrupts(void) | |
138 | { | |
f4eae94f | 139 | return ap_airq_flag; |
cb17a636 FB |
140 | } |
141 | ||
1534c382 | 142 | /** |
1749a81d | 143 | * ap_intructions_available() - Test if AP instructions are available. |
1534c382 | 144 | * |
1749a81d | 145 | * Returns 0 if the AP instructions are installed. |
1534c382 MS |
146 | */ |
147 | static inline int ap_instructions_available(void) | |
148 | { | |
149 | register unsigned long reg0 asm ("0") = AP_MKQID(0,0); | |
150 | register unsigned long reg1 asm ("1") = -ENODEV; | |
151 | register unsigned long reg2 asm ("2") = 0UL; | |
152 | ||
153 | asm volatile( | |
154 | " .long 0xb2af0000\n" /* PQAP(TAPQ) */ | |
155 | "0: la %1,0\n" | |
156 | "1:\n" | |
157 | EX_TABLE(0b, 1b) | |
158 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) : : "cc" ); | |
159 | return reg1; | |
160 | } | |
161 | ||
cb17a636 FB |
162 | /** |
163 | * ap_interrupts_available(): Test if AP interrupts are available. | |
164 | * | |
165 | * Returns 1 if AP interrupts are available. | |
166 | */ | |
167 | static int ap_interrupts_available(void) | |
168 | { | |
86cd741b | 169 | return test_facility(65); |
cb17a636 FB |
170 | } |
171 | ||
75014550 HD |
172 | /** |
173 | * ap_configuration_available(): Test if AP configuration | |
174 | * information is available. | |
175 | * | |
176 | * Returns 1 if AP configuration information is available. | |
177 | */ | |
178 | static int ap_configuration_available(void) | |
179 | { | |
86cd741b | 180 | return test_facility(12); |
75014550 HD |
181 | } |
182 | ||
1534c382 | 183 | /** |
1749a81d FB |
184 | * ap_test_queue(): Test adjunct processor queue. |
185 | * @qid: The AP queue number | |
6acbe21f | 186 | * @info: Pointer to queue descriptor |
1534c382 | 187 | * |
1749a81d | 188 | * Returns AP queue status structure. |
1534c382 MS |
189 | */ |
190 | static inline struct ap_queue_status | |
6acbe21f | 191 | ap_test_queue(ap_qid_t qid, unsigned long *info) |
1534c382 MS |
192 | { |
193 | register unsigned long reg0 asm ("0") = qid; | |
194 | register struct ap_queue_status reg1 asm ("1"); | |
195 | register unsigned long reg2 asm ("2") = 0UL; | |
196 | ||
6acbe21f MS |
197 | if (test_facility(15)) |
198 | reg0 |= 1UL << 23; /* set APFT T bit*/ | |
1534c382 MS |
199 | asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ |
200 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
6acbe21f MS |
201 | if (info) |
202 | *info = reg2; | |
1534c382 MS |
203 | return reg1; |
204 | } | |
205 | ||
206 | /** | |
1749a81d FB |
207 | * ap_reset_queue(): Reset adjunct processor queue. |
208 | * @qid: The AP queue number | |
1534c382 | 209 | * |
1749a81d | 210 | * Returns AP queue status structure. |
1534c382 MS |
211 | */ |
212 | static inline struct ap_queue_status ap_reset_queue(ap_qid_t qid) | |
213 | { | |
214 | register unsigned long reg0 asm ("0") = qid | 0x01000000UL; | |
215 | register struct ap_queue_status reg1 asm ("1"); | |
216 | register unsigned long reg2 asm ("2") = 0UL; | |
217 | ||
218 | asm volatile( | |
219 | ".long 0xb2af0000" /* PQAP(RAPQ) */ | |
220 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
221 | return reg1; | |
222 | } | |
223 | ||
cb17a636 FB |
224 | /** |
225 | * ap_queue_interruption_control(): Enable interruption for a specific AP. | |
226 | * @qid: The AP queue number | |
227 | * @ind: The notification indicator byte | |
228 | * | |
229 | * Returns AP queue status. | |
230 | */ | |
231 | static inline struct ap_queue_status | |
232 | ap_queue_interruption_control(ap_qid_t qid, void *ind) | |
233 | { | |
234 | register unsigned long reg0 asm ("0") = qid | 0x03000000UL; | |
235 | register unsigned long reg1_in asm ("1") = 0x0000800000000000UL | AP_ISC; | |
236 | register struct ap_queue_status reg1_out asm ("1"); | |
237 | register void *reg2 asm ("2") = ind; | |
238 | asm volatile( | |
a7475afd | 239 | ".long 0xb2af0000" /* PQAP(AQIC) */ |
cb17a636 FB |
240 | : "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2) |
241 | : | |
242 | : "cc" ); | |
243 | return reg1_out; | |
244 | } | |
cb17a636 | 245 | |
889875a1 MS |
246 | /** |
247 | * ap_query_configuration(): Get AP configuration data | |
248 | * | |
249 | * Returns 0 on success, or -EOPNOTSUPP. | |
250 | */ | |
251 | static inline int ap_query_configuration(void) | |
75014550 HD |
252 | { |
253 | register unsigned long reg0 asm ("0") = 0x04000000UL; | |
254 | register unsigned long reg1 asm ("1") = -EINVAL; | |
889875a1 | 255 | register void *reg2 asm ("2") = (void *) ap_configuration; |
75014550 | 256 | |
889875a1 MS |
257 | if (!ap_configuration) |
258 | return -EOPNOTSUPP; | |
75014550 HD |
259 | asm volatile( |
260 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
261 | "0: la %1,0\n" | |
262 | "1:\n" | |
263 | EX_TABLE(0b, 1b) | |
264 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) | |
265 | : | |
266 | : "cc"); | |
267 | ||
268 | return reg1; | |
269 | } | |
75014550 | 270 | |
889875a1 MS |
271 | /** |
272 | * ap_init_configuration(): Allocate and query configuration array. | |
273 | */ | |
274 | static void ap_init_configuration(void) | |
275 | { | |
276 | if (!ap_configuration_available()) | |
277 | return; | |
278 | ||
279 | ap_configuration = kzalloc(sizeof(*ap_configuration), GFP_KERNEL); | |
280 | if (!ap_configuration) | |
281 | return; | |
282 | if (ap_query_configuration() != 0) { | |
283 | kfree(ap_configuration); | |
284 | ap_configuration = NULL; | |
285 | return; | |
286 | } | |
287 | } | |
288 | ||
289 | /* | |
290 | * ap_test_config(): helper function to extract the nrth bit | |
291 | * within the unsigned int array field. | |
292 | */ | |
293 | static inline int ap_test_config(unsigned int *field, unsigned int nr) | |
294 | { | |
295 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
296 | } | |
297 | ||
298 | /* | |
299 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
300 | * @id AP card ID | |
301 | * | |
302 | * Returns 0 if the card is not configured | |
303 | * 1 if the card is configured or | |
304 | * if the configuration information is not available | |
305 | */ | |
306 | static inline int ap_test_config_card_id(unsigned int id) | |
307 | { | |
308 | if (!ap_configuration) /* QCI not supported */ | |
309 | return 1; | |
310 | return ap_test_config(ap_configuration->apm, id); | |
311 | } | |
312 | ||
313 | /* | |
314 | * ap_test_config_domain(): Test, whether an AP usage domain is configured. | |
315 | * @domain AP usage domain ID | |
316 | * | |
317 | * Returns 0 if the usage domain is not configured | |
318 | * 1 if the usage domain is configured or | |
319 | * if the configuration information is not available | |
320 | */ | |
321 | static inline int ap_test_config_domain(unsigned int domain) | |
322 | { | |
323 | if (!ap_configuration) /* QCI not supported */ | |
324 | return domain < 16; | |
325 | return ap_test_config(ap_configuration->aqm, domain); | |
326 | } | |
327 | ||
cb17a636 FB |
328 | /** |
329 | * ap_queue_enable_interruption(): Enable interruption on an AP. | |
330 | * @qid: The AP queue number | |
331 | * @ind: the notification indicator byte | |
332 | * | |
333 | * Enables interruption on AP queue via ap_queue_interruption_control(). Based | |
334 | * on the return value it waits a while and tests the AP queue if interrupts | |
335 | * have been switched on using ap_test_queue(). | |
336 | */ | |
c50a160c | 337 | static int ap_queue_enable_interruption(struct ap_device *ap_dev, void *ind) |
cb17a636 | 338 | { |
cb17a636 | 339 | struct ap_queue_status status; |
cb17a636 | 340 | |
c50a160c IT |
341 | status = ap_queue_interruption_control(ap_dev->qid, ind); |
342 | switch (status.response_code) { | |
343 | case AP_RESPONSE_NORMAL: | |
344 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
345 | return 0; | |
346 | case AP_RESPONSE_Q_NOT_AVAIL: | |
347 | case AP_RESPONSE_DECONFIGURED: | |
348 | case AP_RESPONSE_CHECKSTOPPED: | |
349 | case AP_RESPONSE_INVALID_ADDRESS: | |
350 | return -ENODEV; | |
351 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
352 | case AP_RESPONSE_BUSY: | |
353 | default: | |
354 | return -EBUSY; | |
cb17a636 | 355 | } |
cb17a636 FB |
356 | } |
357 | ||
1534c382 | 358 | /** |
1749a81d FB |
359 | * __ap_send(): Send message to adjunct processor queue. |
360 | * @qid: The AP queue number | |
361 | * @psmid: The program supplied message identifier | |
362 | * @msg: The message text | |
363 | * @length: The message length | |
a6a5d73a | 364 | * @special: Special Bit |
1534c382 | 365 | * |
1749a81d | 366 | * Returns AP queue status structure. |
1534c382 | 367 | * Condition code 1 on NQAP can't happen because the L bit is 1. |
1534c382 MS |
368 | * Condition code 2 on NQAP also means the send is incomplete, |
369 | * because a segment boundary was reached. The NQAP is repeated. | |
370 | */ | |
371 | static inline struct ap_queue_status | |
a6a5d73a FB |
372 | __ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length, |
373 | unsigned int special) | |
1534c382 MS |
374 | { |
375 | typedef struct { char _[length]; } msgblock; | |
376 | register unsigned long reg0 asm ("0") = qid | 0x40000000UL; | |
377 | register struct ap_queue_status reg1 asm ("1"); | |
378 | register unsigned long reg2 asm ("2") = (unsigned long) msg; | |
379 | register unsigned long reg3 asm ("3") = (unsigned long) length; | |
380 | register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32); | |
7d6c3b49 | 381 | register unsigned long reg5 asm ("5") = psmid & 0xffffffff; |
1534c382 | 382 | |
a6a5d73a FB |
383 | if (special == 1) |
384 | reg0 |= 0x400000UL; | |
385 | ||
1534c382 | 386 | asm volatile ( |
a7475afd | 387 | "0: .long 0xb2ad0042\n" /* NQAP */ |
1534c382 MS |
388 | " brc 2,0b" |
389 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) | |
390 | : "d" (reg4), "d" (reg5), "m" (*(msgblock *) msg) | |
391 | : "cc" ); | |
392 | return reg1; | |
393 | } | |
394 | ||
395 | int ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) | |
396 | { | |
397 | struct ap_queue_status status; | |
398 | ||
a6a5d73a | 399 | status = __ap_send(qid, psmid, msg, length, 0); |
1534c382 MS |
400 | switch (status.response_code) { |
401 | case AP_RESPONSE_NORMAL: | |
402 | return 0; | |
403 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 404 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 | 405 | return -EBUSY; |
a6a5d73a FB |
406 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
407 | return -EINVAL; | |
1534c382 MS |
408 | default: /* Device is gone. */ |
409 | return -ENODEV; | |
410 | } | |
411 | } | |
412 | EXPORT_SYMBOL(ap_send); | |
413 | ||
1749a81d FB |
414 | /** |
415 | * __ap_recv(): Receive message from adjunct processor queue. | |
416 | * @qid: The AP queue number | |
417 | * @psmid: Pointer to program supplied message identifier | |
418 | * @msg: The message text | |
419 | * @length: The message length | |
1534c382 | 420 | * |
1749a81d | 421 | * Returns AP queue status structure. |
1534c382 MS |
422 | * Condition code 1 on DQAP means the receive has taken place |
423 | * but only partially. The response is incomplete, hence the | |
424 | * DQAP is repeated. | |
1534c382 MS |
425 | * Condition code 2 on DQAP also means the receive is incomplete, |
426 | * this time because a segment boundary was reached. Again, the | |
427 | * DQAP is repeated. | |
1534c382 MS |
428 | * Note that gpr2 is used by the DQAP instruction to keep track of |
429 | * any 'residual' length, in case the instruction gets interrupted. | |
430 | * Hence it gets zeroed before the instruction. | |
431 | */ | |
432 | static inline struct ap_queue_status | |
433 | __ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
434 | { | |
435 | typedef struct { char _[length]; } msgblock; | |
436 | register unsigned long reg0 asm("0") = qid | 0x80000000UL; | |
437 | register struct ap_queue_status reg1 asm ("1"); | |
438 | register unsigned long reg2 asm("2") = 0UL; | |
439 | register unsigned long reg4 asm("4") = (unsigned long) msg; | |
440 | register unsigned long reg5 asm("5") = (unsigned long) length; | |
441 | register unsigned long reg6 asm("6") = 0UL; | |
442 | register unsigned long reg7 asm("7") = 0UL; | |
443 | ||
444 | ||
445 | asm volatile( | |
a7475afd | 446 | "0: .long 0xb2ae0064\n" /* DQAP */ |
1534c382 MS |
447 | " brc 6,0b\n" |
448 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), | |
449 | "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7), | |
450 | "=m" (*(msgblock *) msg) : : "cc" ); | |
451 | *psmid = (((unsigned long long) reg6) << 32) + reg7; | |
452 | return reg1; | |
453 | } | |
454 | ||
455 | int ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
456 | { | |
457 | struct ap_queue_status status; | |
458 | ||
459 | status = __ap_recv(qid, psmid, msg, length); | |
460 | switch (status.response_code) { | |
461 | case AP_RESPONSE_NORMAL: | |
462 | return 0; | |
463 | case AP_RESPONSE_NO_PENDING_REPLY: | |
464 | if (status.queue_empty) | |
465 | return -ENOENT; | |
466 | return -EBUSY; | |
af512ed0 RW |
467 | case AP_RESPONSE_RESET_IN_PROGRESS: |
468 | return -EBUSY; | |
1534c382 MS |
469 | default: |
470 | return -ENODEV; | |
471 | } | |
472 | } | |
473 | EXPORT_SYMBOL(ap_recv); | |
474 | ||
c50a160c IT |
475 | /** |
476 | * __ap_schedule_poll_timer(): Schedule poll timer. | |
477 | * | |
478 | * Set up the timer to run the poll tasklet | |
479 | */ | |
480 | static inline void __ap_schedule_poll_timer(void) | |
481 | { | |
482 | ktime_t hr_time; | |
483 | ||
484 | spin_lock_bh(&ap_poll_timer_lock); | |
485 | if (!hrtimer_is_queued(&ap_poll_timer) && !ap_suspend_flag) { | |
486 | hr_time = ktime_set(0, poll_timeout); | |
487 | hrtimer_forward_now(&ap_poll_timer, hr_time); | |
488 | hrtimer_restart(&ap_poll_timer); | |
489 | } | |
490 | spin_unlock_bh(&ap_poll_timer_lock); | |
491 | } | |
492 | ||
493 | /** | |
494 | * ap_schedule_poll_timer(): Schedule poll timer. | |
495 | * | |
496 | * Set up the timer to run the poll tasklet | |
497 | */ | |
498 | static inline void ap_schedule_poll_timer(void) | |
499 | { | |
500 | if (ap_using_interrupts()) | |
501 | return; | |
502 | __ap_schedule_poll_timer(); | |
503 | } | |
504 | ||
505 | ||
1534c382 | 506 | /** |
1749a81d FB |
507 | * ap_query_queue(): Check if an AP queue is available. |
508 | * @qid: The AP queue number | |
509 | * @queue_depth: Pointer to queue depth value | |
510 | * @device_type: Pointer to device type value | |
6acbe21f | 511 | * @facilities: Pointer to facility indicator |
1534c382 | 512 | */ |
6acbe21f MS |
513 | static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type, |
514 | unsigned int *facilities) | |
1534c382 MS |
515 | { |
516 | struct ap_queue_status status; | |
6acbe21f | 517 | unsigned long info; |
889875a1 MS |
518 | int nd; |
519 | ||
520 | if (!ap_test_config_card_id(AP_QID_DEVICE(qid))) | |
521 | return -ENODEV; | |
1534c382 | 522 | |
6acbe21f | 523 | status = ap_test_queue(qid, &info); |
c50a160c IT |
524 | switch (status.response_code) { |
525 | case AP_RESPONSE_NORMAL: | |
6acbe21f MS |
526 | *queue_depth = (int)(info & 0xff); |
527 | *device_type = (int)((info >> 24) & 0xff); | |
528 | *facilities = (unsigned int)(info >> 32); | |
889875a1 MS |
529 | /* Update maximum domain id */ |
530 | nd = (info >> 16) & 0xff; | |
531 | if ((info & (1UL << 57)) && nd > 0) | |
532 | ap_max_domain_id = nd; | |
c50a160c IT |
533 | return 0; |
534 | case AP_RESPONSE_Q_NOT_AVAIL: | |
535 | case AP_RESPONSE_DECONFIGURED: | |
536 | case AP_RESPONSE_CHECKSTOPPED: | |
537 | case AP_RESPONSE_INVALID_ADDRESS: | |
538 | return -ENODEV; | |
539 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
540 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
541 | case AP_RESPONSE_BUSY: | |
542 | return -EBUSY; | |
543 | default: | |
544 | BUG(); | |
1534c382 | 545 | } |
1534c382 MS |
546 | } |
547 | ||
548 | /** | |
1749a81d FB |
549 | * ap_init_queue(): Reset an AP queue. |
550 | * @qid: The AP queue number | |
551 | * | |
c50a160c IT |
552 | * Submit the Reset command to an AP queue. |
553 | * Since the reset is asynchron set the state to 'RESET_IN_PROGRESS' | |
554 | * and check later via ap_poll_queue() if the reset is done. | |
1534c382 | 555 | */ |
c50a160c | 556 | static int ap_init_queue(struct ap_device *ap_dev) |
1534c382 MS |
557 | { |
558 | struct ap_queue_status status; | |
1534c382 | 559 | |
c50a160c IT |
560 | status = ap_reset_queue(ap_dev->qid); |
561 | switch (status.response_code) { | |
562 | case AP_RESPONSE_NORMAL: | |
563 | ap_dev->interrupt = AP_INTR_DISABLED; | |
564 | ap_dev->reset = AP_RESET_IN_PROGRESS; | |
565 | return 0; | |
566 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
567 | case AP_RESPONSE_BUSY: | |
568 | return -EBUSY; | |
569 | case AP_RESPONSE_Q_NOT_AVAIL: | |
570 | case AP_RESPONSE_DECONFIGURED: | |
571 | case AP_RESPONSE_CHECKSTOPPED: | |
572 | default: | |
573 | return -ENODEV; | |
cb17a636 | 574 | } |
1534c382 MS |
575 | } |
576 | ||
af512ed0 | 577 | /** |
1749a81d FB |
578 | * ap_increase_queue_count(): Arm request timeout. |
579 | * @ap_dev: Pointer to an AP device. | |
580 | * | |
581 | * Arm request timeout if an AP device was idle and a new request is submitted. | |
af512ed0 RW |
582 | */ |
583 | static void ap_increase_queue_count(struct ap_device *ap_dev) | |
584 | { | |
585 | int timeout = ap_dev->drv->request_timeout; | |
586 | ||
587 | ap_dev->queue_count++; | |
588 | if (ap_dev->queue_count == 1) { | |
589 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
590 | ap_dev->reset = AP_RESET_ARMED; | |
591 | } | |
592 | } | |
593 | ||
594 | /** | |
1749a81d FB |
595 | * ap_decrease_queue_count(): Decrease queue count. |
596 | * @ap_dev: Pointer to an AP device. | |
597 | * | |
598 | * If AP device is still alive, re-schedule request timeout if there are still | |
af512ed0 RW |
599 | * pending requests. |
600 | */ | |
601 | static void ap_decrease_queue_count(struct ap_device *ap_dev) | |
602 | { | |
603 | int timeout = ap_dev->drv->request_timeout; | |
604 | ||
605 | ap_dev->queue_count--; | |
606 | if (ap_dev->queue_count > 0) | |
607 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
608 | else | |
1749a81d | 609 | /* |
af512ed0 RW |
610 | * The timeout timer should to be disabled now - since |
611 | * del_timer_sync() is very expensive, we just tell via the | |
612 | * reset flag to ignore the pending timeout timer. | |
613 | */ | |
614 | ap_dev->reset = AP_RESET_IGNORE; | |
615 | } | |
616 | ||
1749a81d | 617 | /* |
1534c382 MS |
618 | * AP device related attributes. |
619 | */ | |
620 | static ssize_t ap_hwtype_show(struct device *dev, | |
621 | struct device_attribute *attr, char *buf) | |
622 | { | |
623 | struct ap_device *ap_dev = to_ap_dev(dev); | |
624 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->device_type); | |
625 | } | |
1534c382 | 626 | |
43c207e6 | 627 | static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL); |
42f4dd61 IT |
628 | |
629 | static ssize_t ap_raw_hwtype_show(struct device *dev, | |
630 | struct device_attribute *attr, char *buf) | |
631 | { | |
632 | struct ap_device *ap_dev = to_ap_dev(dev); | |
633 | ||
634 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->raw_hwtype); | |
635 | } | |
636 | ||
637 | static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL); | |
638 | ||
1534c382 MS |
639 | static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr, |
640 | char *buf) | |
641 | { | |
642 | struct ap_device *ap_dev = to_ap_dev(dev); | |
643 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->queue_depth); | |
644 | } | |
1534c382 | 645 | |
43c207e6 | 646 | static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL); |
1534c382 MS |
647 | static ssize_t ap_request_count_show(struct device *dev, |
648 | struct device_attribute *attr, | |
649 | char *buf) | |
650 | { | |
651 | struct ap_device *ap_dev = to_ap_dev(dev); | |
652 | int rc; | |
653 | ||
654 | spin_lock_bh(&ap_dev->lock); | |
655 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->total_request_count); | |
656 | spin_unlock_bh(&ap_dev->lock); | |
657 | return rc; | |
658 | } | |
659 | ||
660 | static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL); | |
661 | ||
b26bd941 HD |
662 | static ssize_t ap_requestq_count_show(struct device *dev, |
663 | struct device_attribute *attr, char *buf) | |
664 | { | |
665 | struct ap_device *ap_dev = to_ap_dev(dev); | |
666 | int rc; | |
667 | ||
668 | spin_lock_bh(&ap_dev->lock); | |
669 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->requestq_count); | |
670 | spin_unlock_bh(&ap_dev->lock); | |
671 | return rc; | |
672 | } | |
673 | ||
674 | static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL); | |
675 | ||
676 | static ssize_t ap_pendingq_count_show(struct device *dev, | |
677 | struct device_attribute *attr, char *buf) | |
678 | { | |
679 | struct ap_device *ap_dev = to_ap_dev(dev); | |
680 | int rc; | |
681 | ||
682 | spin_lock_bh(&ap_dev->lock); | |
683 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->pendingq_count); | |
684 | spin_unlock_bh(&ap_dev->lock); | |
685 | return rc; | |
686 | } | |
687 | ||
688 | static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL); | |
689 | ||
c50a160c IT |
690 | static ssize_t ap_reset_show(struct device *dev, |
691 | struct device_attribute *attr, char *buf) | |
692 | { | |
693 | struct ap_device *ap_dev = to_ap_dev(dev); | |
694 | int rc = 0; | |
695 | ||
696 | spin_lock_bh(&ap_dev->lock); | |
697 | switch (ap_dev->reset) { | |
698 | case AP_RESET_IGNORE: | |
699 | rc = snprintf(buf, PAGE_SIZE, "No Reset Timer set.\n"); | |
700 | break; | |
701 | case AP_RESET_ARMED: | |
702 | rc = snprintf(buf, PAGE_SIZE, "Reset Timer armed.\n"); | |
703 | break; | |
704 | case AP_RESET_DO: | |
705 | rc = snprintf(buf, PAGE_SIZE, "Reset Timer expired.\n"); | |
706 | break; | |
707 | case AP_RESET_IN_PROGRESS: | |
708 | rc = snprintf(buf, PAGE_SIZE, "Reset in progress.\n"); | |
709 | break; | |
710 | default: | |
711 | break; | |
712 | } | |
713 | spin_unlock_bh(&ap_dev->lock); | |
714 | return rc; | |
715 | } | |
716 | ||
717 | static DEVICE_ATTR(reset, 0444, ap_reset_show, NULL); | |
718 | ||
719 | static ssize_t ap_interrupt_show(struct device *dev, | |
720 | struct device_attribute *attr, char *buf) | |
721 | { | |
722 | struct ap_device *ap_dev = to_ap_dev(dev); | |
723 | int rc = 0; | |
724 | ||
725 | spin_lock_bh(&ap_dev->lock); | |
726 | switch (ap_dev->interrupt) { | |
727 | case AP_INTR_DISABLED: | |
728 | rc = snprintf(buf, PAGE_SIZE, "Interrupts disabled.\n"); | |
729 | break; | |
730 | case AP_INTR_ENABLED: | |
731 | rc = snprintf(buf, PAGE_SIZE, "Interrupts enabled.\n"); | |
732 | break; | |
733 | case AP_INTR_IN_PROGRESS: | |
734 | rc = snprintf(buf, PAGE_SIZE, "Enable Interrupt pending.\n"); | |
735 | break; | |
736 | } | |
737 | spin_unlock_bh(&ap_dev->lock); | |
738 | return rc; | |
739 | } | |
740 | ||
741 | static DEVICE_ATTR(interrupt, 0444, ap_interrupt_show, NULL); | |
742 | ||
1534c382 MS |
743 | static ssize_t ap_modalias_show(struct device *dev, |
744 | struct device_attribute *attr, char *buf) | |
745 | { | |
c50a160c | 746 | return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type); |
1534c382 MS |
747 | } |
748 | ||
749 | static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL); | |
750 | ||
b26bd941 HD |
751 | static ssize_t ap_functions_show(struct device *dev, |
752 | struct device_attribute *attr, char *buf) | |
753 | { | |
754 | struct ap_device *ap_dev = to_ap_dev(dev); | |
755 | return snprintf(buf, PAGE_SIZE, "0x%08X\n", ap_dev->functions); | |
756 | } | |
757 | ||
758 | static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL); | |
759 | ||
1534c382 MS |
760 | static struct attribute *ap_dev_attrs[] = { |
761 | &dev_attr_hwtype.attr, | |
42f4dd61 | 762 | &dev_attr_raw_hwtype.attr, |
1534c382 MS |
763 | &dev_attr_depth.attr, |
764 | &dev_attr_request_count.attr, | |
b26bd941 HD |
765 | &dev_attr_requestq_count.attr, |
766 | &dev_attr_pendingq_count.attr, | |
c50a160c IT |
767 | &dev_attr_reset.attr, |
768 | &dev_attr_interrupt.attr, | |
1534c382 | 769 | &dev_attr_modalias.attr, |
b26bd941 | 770 | &dev_attr_ap_functions.attr, |
1534c382 MS |
771 | NULL |
772 | }; | |
773 | static struct attribute_group ap_dev_attr_group = { | |
774 | .attrs = ap_dev_attrs | |
775 | }; | |
776 | ||
777 | /** | |
1749a81d FB |
778 | * ap_bus_match() |
779 | * @dev: Pointer to device | |
780 | * @drv: Pointer to device_driver | |
781 | * | |
1534c382 MS |
782 | * AP bus driver registration/unregistration. |
783 | */ | |
784 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
785 | { | |
786 | struct ap_device *ap_dev = to_ap_dev(dev); | |
787 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
788 | struct ap_device_id *id; | |
789 | ||
1749a81d | 790 | /* |
1534c382 MS |
791 | * Compare device type of the device with the list of |
792 | * supported types of the device_driver. | |
793 | */ | |
794 | for (id = ap_drv->ids; id->match_flags; id++) { | |
795 | if ((id->match_flags & AP_DEVICE_ID_MATCH_DEVICE_TYPE) && | |
796 | (id->dev_type != ap_dev->device_type)) | |
797 | continue; | |
798 | return 1; | |
799 | } | |
800 | return 0; | |
801 | } | |
802 | ||
803 | /** | |
1749a81d FB |
804 | * ap_uevent(): Uevent function for AP devices. |
805 | * @dev: Pointer to device | |
806 | * @env: Pointer to kobj_uevent_env | |
807 | * | |
808 | * It sets up a single environment variable DEV_TYPE which contains the | |
809 | * hardware device type. | |
1534c382 | 810 | */ |
7eff2e7a | 811 | static int ap_uevent (struct device *dev, struct kobj_uevent_env *env) |
1534c382 MS |
812 | { |
813 | struct ap_device *ap_dev = to_ap_dev(dev); | |
7eff2e7a | 814 | int retval = 0; |
1534c382 MS |
815 | |
816 | if (!ap_dev) | |
817 | return -ENODEV; | |
818 | ||
819 | /* Set up DEV_TYPE environment variable. */ | |
7eff2e7a | 820 | retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); |
bf62456e ER |
821 | if (retval) |
822 | return retval; | |
823 | ||
66a4263b | 824 | /* Add MODALIAS= */ |
7eff2e7a | 825 | retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); |
bf62456e | 826 | |
bf62456e | 827 | return retval; |
1534c382 MS |
828 | } |
829 | ||
772f5472 FB |
830 | static int ap_bus_suspend(struct device *dev, pm_message_t state) |
831 | { | |
832 | struct ap_device *ap_dev = to_ap_dev(dev); | |
833 | unsigned long flags; | |
834 | ||
835 | if (!ap_suspend_flag) { | |
836 | ap_suspend_flag = 1; | |
837 | ||
838 | /* Disable scanning for devices, thus we do not want to scan | |
839 | * for them after removing. | |
840 | */ | |
841 | del_timer_sync(&ap_config_timer); | |
842 | if (ap_work_queue != NULL) { | |
843 | destroy_workqueue(ap_work_queue); | |
844 | ap_work_queue = NULL; | |
845 | } | |
5314af69 | 846 | |
772f5472 FB |
847 | tasklet_disable(&ap_tasklet); |
848 | } | |
849 | /* Poll on the device until all requests are finished. */ | |
850 | do { | |
851 | flags = 0; | |
95f1556c | 852 | spin_lock_bh(&ap_dev->lock); |
772f5472 | 853 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 854 | spin_unlock_bh(&ap_dev->lock); |
772f5472 FB |
855 | } while ((flags & 1) || (flags & 2)); |
856 | ||
5314af69 FB |
857 | spin_lock_bh(&ap_dev->lock); |
858 | ap_dev->unregistered = 1; | |
859 | spin_unlock_bh(&ap_dev->lock); | |
860 | ||
772f5472 FB |
861 | return 0; |
862 | } | |
863 | ||
864 | static int ap_bus_resume(struct device *dev) | |
865 | { | |
772f5472 | 866 | struct ap_device *ap_dev = to_ap_dev(dev); |
f4eae94f | 867 | int rc; |
772f5472 FB |
868 | |
869 | if (ap_suspend_flag) { | |
870 | ap_suspend_flag = 0; | |
f4eae94f MS |
871 | if (ap_interrupts_available()) { |
872 | if (!ap_using_interrupts()) { | |
873 | rc = register_adapter_interrupt(&ap_airq); | |
874 | ap_airq_flag = (rc == 0); | |
875 | } | |
876 | } else { | |
877 | if (ap_using_interrupts()) { | |
878 | unregister_adapter_interrupt(&ap_airq); | |
879 | ap_airq_flag = 0; | |
880 | } | |
881 | } | |
75014550 | 882 | ap_query_configuration(); |
5314af69 FB |
883 | if (!user_set_domain) { |
884 | ap_domain_index = -1; | |
885 | ap_select_domain(); | |
886 | } | |
772f5472 FB |
887 | init_timer(&ap_config_timer); |
888 | ap_config_timer.function = ap_config_timeout; | |
889 | ap_config_timer.data = 0; | |
890 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
891 | add_timer(&ap_config_timer); | |
892 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
893 | if (!ap_work_queue) | |
894 | return -ENOMEM; | |
895 | tasklet_enable(&ap_tasklet); | |
896 | if (!ap_using_interrupts()) | |
897 | ap_schedule_poll_timer(); | |
898 | else | |
899 | tasklet_schedule(&ap_tasklet); | |
900 | if (ap_thread_flag) | |
901 | rc = ap_poll_thread_start(); | |
f4eae94f MS |
902 | else |
903 | rc = 0; | |
904 | } else | |
905 | rc = 0; | |
5314af69 FB |
906 | if (AP_QID_QUEUE(ap_dev->qid) != ap_domain_index) { |
907 | spin_lock_bh(&ap_dev->lock); | |
908 | ap_dev->qid = AP_MKQID(AP_QID_DEVICE(ap_dev->qid), | |
909 | ap_domain_index); | |
910 | spin_unlock_bh(&ap_dev->lock); | |
911 | } | |
912 | queue_work(ap_work_queue, &ap_config_work); | |
772f5472 FB |
913 | |
914 | return rc; | |
915 | } | |
916 | ||
1534c382 MS |
917 | static struct bus_type ap_bus_type = { |
918 | .name = "ap", | |
919 | .match = &ap_bus_match, | |
920 | .uevent = &ap_uevent, | |
772f5472 FB |
921 | .suspend = ap_bus_suspend, |
922 | .resume = ap_bus_resume | |
1534c382 MS |
923 | }; |
924 | ||
925 | static int ap_device_probe(struct device *dev) | |
926 | { | |
927 | struct ap_device *ap_dev = to_ap_dev(dev); | |
928 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); | |
929 | int rc; | |
930 | ||
931 | ap_dev->drv = ap_drv; | |
666e68e0 IT |
932 | |
933 | spin_lock_bh(&ap_device_list_lock); | |
934 | list_add(&ap_dev->list, &ap_device_list); | |
935 | spin_unlock_bh(&ap_device_list_lock); | |
936 | ||
1534c382 | 937 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
666e68e0 | 938 | if (rc) { |
43c207e6 | 939 | spin_lock_bh(&ap_device_list_lock); |
666e68e0 | 940 | list_del_init(&ap_dev->list); |
43c207e6 | 941 | spin_unlock_bh(&ap_device_list_lock); |
c50a160c IT |
942 | } else { |
943 | if (ap_dev->reset == AP_RESET_IN_PROGRESS || | |
944 | ap_dev->interrupt == AP_INTR_IN_PROGRESS) | |
945 | __ap_schedule_poll_timer(); | |
faa582ca | 946 | } |
1534c382 MS |
947 | return rc; |
948 | } | |
949 | ||
950 | /** | |
1749a81d FB |
951 | * __ap_flush_queue(): Flush requests. |
952 | * @ap_dev: Pointer to the AP device | |
953 | * | |
1534c382 | 954 | * Flush all requests from the request/pending queue of an AP device. |
1534c382 | 955 | */ |
4d284cac | 956 | static void __ap_flush_queue(struct ap_device *ap_dev) |
1534c382 MS |
957 | { |
958 | struct ap_message *ap_msg, *next; | |
959 | ||
960 | list_for_each_entry_safe(ap_msg, next, &ap_dev->pendingq, list) { | |
961 | list_del_init(&ap_msg->list); | |
962 | ap_dev->pendingq_count--; | |
54a8f561 | 963 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
964 | } |
965 | list_for_each_entry_safe(ap_msg, next, &ap_dev->requestq, list) { | |
966 | list_del_init(&ap_msg->list); | |
967 | ap_dev->requestq_count--; | |
54a8f561 | 968 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
969 | } |
970 | } | |
971 | ||
972 | void ap_flush_queue(struct ap_device *ap_dev) | |
973 | { | |
974 | spin_lock_bh(&ap_dev->lock); | |
975 | __ap_flush_queue(ap_dev); | |
976 | spin_unlock_bh(&ap_dev->lock); | |
977 | } | |
978 | EXPORT_SYMBOL(ap_flush_queue); | |
979 | ||
980 | static int ap_device_remove(struct device *dev) | |
981 | { | |
982 | struct ap_device *ap_dev = to_ap_dev(dev); | |
983 | struct ap_driver *ap_drv = ap_dev->drv; | |
984 | ||
4e56296d | 985 | ap_flush_queue(ap_dev); |
af512ed0 | 986 | del_timer_sync(&ap_dev->timeout); |
43c207e6 | 987 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 988 | list_del_init(&ap_dev->list); |
43c207e6 | 989 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca RW |
990 | if (ap_drv->remove) |
991 | ap_drv->remove(ap_dev); | |
e675c0d2 RW |
992 | spin_lock_bh(&ap_dev->lock); |
993 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
994 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
995 | return 0; |
996 | } | |
997 | ||
998 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, | |
999 | char *name) | |
1000 | { | |
1001 | struct device_driver *drv = &ap_drv->driver; | |
1002 | ||
1003 | drv->bus = &ap_bus_type; | |
1004 | drv->probe = ap_device_probe; | |
1005 | drv->remove = ap_device_remove; | |
1006 | drv->owner = owner; | |
1007 | drv->name = name; | |
1008 | return driver_register(drv); | |
1009 | } | |
1010 | EXPORT_SYMBOL(ap_driver_register); | |
1011 | ||
1012 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
1013 | { | |
1014 | driver_unregister(&ap_drv->driver); | |
1015 | } | |
1016 | EXPORT_SYMBOL(ap_driver_unregister); | |
1017 | ||
dabecb29 HD |
1018 | void ap_bus_force_rescan(void) |
1019 | { | |
56bbe686 IT |
1020 | /* reconfigure the AP bus rescan timer. */ |
1021 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); | |
1022 | /* processing a asynchronous bus rescan */ | |
1023 | queue_work(ap_work_queue, &ap_config_work); | |
1024 | flush_work(&ap_config_work); | |
dabecb29 HD |
1025 | } |
1026 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
1027 | ||
1749a81d | 1028 | /* |
1534c382 MS |
1029 | * AP bus attributes. |
1030 | */ | |
1031 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) | |
1032 | { | |
1033 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); | |
1034 | } | |
1035 | ||
1036 | static BUS_ATTR(ap_domain, 0444, ap_domain_show, NULL); | |
1037 | ||
91f3e3ea IT |
1038 | static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf) |
1039 | { | |
889875a1 MS |
1040 | if (!ap_configuration) /* QCI not supported */ |
1041 | return snprintf(buf, PAGE_SIZE, "not supported\n"); | |
1042 | if (!test_facility(76)) | |
1043 | /* format 0 - 16 bit domain field */ | |
1044 | return snprintf(buf, PAGE_SIZE, "%08x%08x\n", | |
1045 | ap_configuration->adm[0], | |
1046 | ap_configuration->adm[1]); | |
1047 | /* format 1 - 256 bit domain field */ | |
1048 | return snprintf(buf, PAGE_SIZE, | |
1049 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
91f3e3ea IT |
1050 | ap_configuration->adm[0], ap_configuration->adm[1], |
1051 | ap_configuration->adm[2], ap_configuration->adm[3], | |
1052 | ap_configuration->adm[4], ap_configuration->adm[5], | |
1053 | ap_configuration->adm[6], ap_configuration->adm[7]); | |
91f3e3ea IT |
1054 | } |
1055 | ||
1056 | static BUS_ATTR(ap_control_domain_mask, 0444, | |
1057 | ap_control_domain_mask_show, NULL); | |
1058 | ||
1534c382 MS |
1059 | static ssize_t ap_config_time_show(struct bus_type *bus, char *buf) |
1060 | { | |
1061 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); | |
1062 | } | |
1063 | ||
cb17a636 FB |
1064 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
1065 | { | |
1066 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
1067 | ap_using_interrupts() ? 1 : 0); | |
1068 | } | |
1069 | ||
1070 | static BUS_ATTR(ap_interrupts, 0444, ap_interrupts_show, NULL); | |
1071 | ||
1534c382 MS |
1072 | static ssize_t ap_config_time_store(struct bus_type *bus, |
1073 | const char *buf, size_t count) | |
1074 | { | |
1075 | int time; | |
1076 | ||
1077 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1078 | return -EINVAL; | |
1079 | ap_config_time = time; | |
1080 | if (!timer_pending(&ap_config_timer) || | |
1081 | !mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ)) { | |
1082 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1083 | add_timer(&ap_config_timer); | |
1084 | } | |
1085 | return count; | |
1086 | } | |
1087 | ||
1088 | static BUS_ATTR(config_time, 0644, ap_config_time_show, ap_config_time_store); | |
1089 | ||
1090 | static ssize_t ap_poll_thread_show(struct bus_type *bus, char *buf) | |
1091 | { | |
1092 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); | |
1093 | } | |
1094 | ||
1095 | static ssize_t ap_poll_thread_store(struct bus_type *bus, | |
1096 | const char *buf, size_t count) | |
1097 | { | |
1098 | int flag, rc; | |
1099 | ||
1100 | if (sscanf(buf, "%d\n", &flag) != 1) | |
1101 | return -EINVAL; | |
1102 | if (flag) { | |
1103 | rc = ap_poll_thread_start(); | |
1104 | if (rc) | |
1105 | return rc; | |
1106 | } | |
1107 | else | |
1108 | ap_poll_thread_stop(); | |
1109 | return count; | |
1110 | } | |
1111 | ||
1112 | static BUS_ATTR(poll_thread, 0644, ap_poll_thread_show, ap_poll_thread_store); | |
1113 | ||
fe137230 FB |
1114 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
1115 | { | |
1116 | return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); | |
1117 | } | |
1118 | ||
1119 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
1120 | size_t count) | |
1121 | { | |
1122 | unsigned long long time; | |
1123 | ktime_t hr_time; | |
1124 | ||
1125 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
1126 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
1127 | time > 120000000000ULL) | |
fe137230 FB |
1128 | return -EINVAL; |
1129 | poll_timeout = time; | |
1130 | hr_time = ktime_set(0, poll_timeout); | |
1131 | ||
8cc2af7c IT |
1132 | spin_lock_bh(&ap_poll_timer_lock); |
1133 | hrtimer_cancel(&ap_poll_timer); | |
1134 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1135 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
1136 | spin_unlock_bh(&ap_poll_timer_lock); | |
1137 | ||
fe137230 FB |
1138 | return count; |
1139 | } | |
1140 | ||
1141 | static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store); | |
1142 | ||
5bc334bf IT |
1143 | static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf) |
1144 | { | |
889875a1 MS |
1145 | int max_domain_id; |
1146 | ||
1147 | if (ap_configuration) | |
1148 | max_domain_id = ap_max_domain_id ? : -1; | |
1149 | else | |
5bc334bf | 1150 | max_domain_id = 15; |
5bc334bf IT |
1151 | return snprintf(buf, PAGE_SIZE, "%d\n", max_domain_id); |
1152 | } | |
1153 | ||
1154 | static BUS_ATTR(ap_max_domain_id, 0444, ap_max_domain_id_show, NULL); | |
1155 | ||
1534c382 MS |
1156 | static struct bus_attribute *const ap_bus_attrs[] = { |
1157 | &bus_attr_ap_domain, | |
91f3e3ea | 1158 | &bus_attr_ap_control_domain_mask, |
1534c382 MS |
1159 | &bus_attr_config_time, |
1160 | &bus_attr_poll_thread, | |
cb17a636 | 1161 | &bus_attr_ap_interrupts, |
fe137230 | 1162 | &bus_attr_poll_timeout, |
5bc334bf | 1163 | &bus_attr_ap_max_domain_id, |
fe137230 | 1164 | NULL, |
1534c382 MS |
1165 | }; |
1166 | ||
1167 | /** | |
1749a81d FB |
1168 | * ap_select_domain(): Select an AP domain. |
1169 | * | |
1170 | * Pick one of the 16 AP domains. | |
1534c382 | 1171 | */ |
4d284cac | 1172 | static int ap_select_domain(void) |
1534c382 | 1173 | { |
6acbe21f MS |
1174 | int count, max_count, best_domain; |
1175 | struct ap_queue_status status; | |
1176 | int i, j; | |
1534c382 | 1177 | |
1749a81d | 1178 | /* |
1534c382 MS |
1179 | * We want to use a single domain. Either the one specified with |
1180 | * the "domain=" parameter or the domain with the maximum number | |
1181 | * of devices. | |
1182 | */ | |
889875a1 | 1183 | if (ap_domain_index >= 0) |
1534c382 MS |
1184 | /* Domain has already been selected. */ |
1185 | return 0; | |
1186 | best_domain = -1; | |
1187 | max_count = 0; | |
1188 | for (i = 0; i < AP_DOMAINS; i++) { | |
75014550 HD |
1189 | if (!ap_test_config_domain(i)) |
1190 | continue; | |
1534c382 MS |
1191 | count = 0; |
1192 | for (j = 0; j < AP_DEVICES; j++) { | |
75014550 HD |
1193 | if (!ap_test_config_card_id(j)) |
1194 | continue; | |
6acbe21f MS |
1195 | status = ap_test_queue(AP_MKQID(j, i), NULL); |
1196 | if (status.response_code != AP_RESPONSE_NORMAL) | |
1534c382 MS |
1197 | continue; |
1198 | count++; | |
1199 | } | |
1200 | if (count > max_count) { | |
1201 | max_count = count; | |
1202 | best_domain = i; | |
1203 | } | |
1204 | } | |
1205 | if (best_domain >= 0){ | |
1206 | ap_domain_index = best_domain; | |
1207 | return 0; | |
1208 | } | |
1209 | return -ENODEV; | |
1210 | } | |
1211 | ||
1212 | /** | |
1749a81d | 1213 | * ap_probe_device_type(): Find the device type of an AP. |
1534c382 | 1214 | * @ap_dev: pointer to the AP device. |
1749a81d FB |
1215 | * |
1216 | * Find the device type if query queue returned a device type of 0. | |
1534c382 MS |
1217 | */ |
1218 | static int ap_probe_device_type(struct ap_device *ap_dev) | |
1219 | { | |
1220 | static unsigned char msg[] = { | |
1221 | 0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00, | |
1222 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1223 | 0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00, | |
1224 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1225 | 0x01,0x00,0x43,0x43,0x41,0x2d,0x41,0x50, | |
1226 | 0x50,0x4c,0x20,0x20,0x20,0x01,0x01,0x01, | |
1227 | 0x00,0x00,0x00,0x00,0x50,0x4b,0x00,0x00, | |
1228 | 0x00,0x00,0x01,0x1c,0x00,0x00,0x00,0x00, | |
1229 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1230 | 0x00,0x00,0x05,0xb8,0x00,0x00,0x00,0x00, | |
1231 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1232 | 0x70,0x00,0x41,0x00,0x00,0x00,0x00,0x00, | |
1233 | 0x00,0x00,0x54,0x32,0x01,0x00,0xa0,0x00, | |
1234 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1235 | 0x00,0x00,0x00,0x00,0xb8,0x05,0x00,0x00, | |
1236 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1237 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1238 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1239 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1240 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1241 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1242 | 0x00,0x00,0x0a,0x00,0x00,0x00,0x00,0x00, | |
1243 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1244 | 0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00, | |
1245 | 0x49,0x43,0x53,0x46,0x20,0x20,0x20,0x20, | |
1246 | 0x50,0x4b,0x0a,0x00,0x50,0x4b,0x43,0x53, | |
1247 | 0x2d,0x31,0x2e,0x32,0x37,0x00,0x11,0x22, | |
1248 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1249 | 0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88, | |
1250 | 0x99,0x00,0x11,0x22,0x33,0x44,0x55,0x66, | |
1251 | 0x77,0x88,0x99,0x00,0x11,0x22,0x33,0x44, | |
1252 | 0x55,0x66,0x77,0x88,0x99,0x00,0x11,0x22, | |
1253 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1254 | 0x11,0x22,0x33,0x5d,0x00,0x5b,0x00,0x77, | |
1255 | 0x88,0x1e,0x00,0x00,0x57,0x00,0x00,0x00, | |
1256 | 0x00,0x04,0x00,0x00,0x4f,0x00,0x00,0x00, | |
1257 | 0x03,0x02,0x00,0x00,0x40,0x01,0x00,0x01, | |
1258 | 0xce,0x02,0x68,0x2d,0x5f,0xa9,0xde,0x0c, | |
1259 | 0xf6,0xd2,0x7b,0x58,0x4b,0xf9,0x28,0x68, | |
1260 | 0x3d,0xb4,0xf4,0xef,0x78,0xd5,0xbe,0x66, | |
1261 | 0x63,0x42,0xef,0xf8,0xfd,0xa4,0xf8,0xb0, | |
1262 | 0x8e,0x29,0xc2,0xc9,0x2e,0xd8,0x45,0xb8, | |
1263 | 0x53,0x8c,0x6f,0x4e,0x72,0x8f,0x6c,0x04, | |
1264 | 0x9c,0x88,0xfc,0x1e,0xc5,0x83,0x55,0x57, | |
1265 | 0xf7,0xdd,0xfd,0x4f,0x11,0x36,0x95,0x5d, | |
1266 | }; | |
1267 | struct ap_queue_status status; | |
1268 | unsigned long long psmid; | |
1269 | char *reply; | |
1270 | int rc, i; | |
1271 | ||
1272 | reply = (void *) get_zeroed_page(GFP_KERNEL); | |
1273 | if (!reply) { | |
1274 | rc = -ENOMEM; | |
1275 | goto out; | |
1276 | } | |
1277 | ||
1278 | status = __ap_send(ap_dev->qid, 0x0102030405060708ULL, | |
a6a5d73a | 1279 | msg, sizeof(msg), 0); |
1534c382 MS |
1280 | if (status.response_code != AP_RESPONSE_NORMAL) { |
1281 | rc = -ENODEV; | |
1282 | goto out_free; | |
1283 | } | |
1284 | ||
1285 | /* Wait for the test message to complete. */ | |
1286 | for (i = 0; i < 6; i++) { | |
e4e1899a | 1287 | msleep(300); |
1534c382 MS |
1288 | status = __ap_recv(ap_dev->qid, &psmid, reply, 4096); |
1289 | if (status.response_code == AP_RESPONSE_NORMAL && | |
1290 | psmid == 0x0102030405060708ULL) | |
1291 | break; | |
1292 | } | |
1293 | if (i < 6) { | |
1294 | /* Got an answer. */ | |
1295 | if (reply[0] == 0x00 && reply[1] == 0x86) | |
1296 | ap_dev->device_type = AP_DEVICE_TYPE_PCICC; | |
1297 | else | |
1298 | ap_dev->device_type = AP_DEVICE_TYPE_PCICA; | |
1299 | rc = 0; | |
1300 | } else | |
1301 | rc = -ENODEV; | |
1302 | ||
1303 | out_free: | |
1304 | free_page((unsigned long) reply); | |
1305 | out: | |
1306 | return rc; | |
1307 | } | |
1308 | ||
f4eae94f | 1309 | static void ap_interrupt_handler(struct airq_struct *airq) |
cb17a636 | 1310 | { |
420f42ec | 1311 | inc_irq_stat(IRQIO_APB); |
cb17a636 FB |
1312 | tasklet_schedule(&ap_tasklet); |
1313 | } | |
1314 | ||
1534c382 | 1315 | /** |
1749a81d FB |
1316 | * __ap_scan_bus(): Scan the AP bus. |
1317 | * @dev: Pointer to device | |
1318 | * @data: Pointer to data | |
1319 | * | |
1320 | * Scan the AP bus for new devices. | |
1534c382 MS |
1321 | */ |
1322 | static int __ap_scan_bus(struct device *dev, void *data) | |
1323 | { | |
1324 | return to_ap_dev(dev)->qid == (ap_qid_t)(unsigned long) data; | |
1325 | } | |
1326 | ||
1327 | static void ap_device_release(struct device *dev) | |
1328 | { | |
1329 | struct ap_device *ap_dev = to_ap_dev(dev); | |
1330 | ||
1331 | kfree(ap_dev); | |
1332 | } | |
1333 | ||
4927b3f7 | 1334 | static void ap_scan_bus(struct work_struct *unused) |
1534c382 MS |
1335 | { |
1336 | struct ap_device *ap_dev; | |
1337 | struct device *dev; | |
1338 | ap_qid_t qid; | |
c50a160c | 1339 | int queue_depth = 0, device_type = 0; |
6bed05bc | 1340 | unsigned int device_functions; |
1534c382 MS |
1341 | int rc, i; |
1342 | ||
75014550 | 1343 | ap_query_configuration(); |
56bbe686 | 1344 | if (ap_select_domain() != 0) { |
1534c382 | 1345 | return; |
56bbe686 | 1346 | } |
889875a1 | 1347 | |
1534c382 MS |
1348 | for (i = 0; i < AP_DEVICES; i++) { |
1349 | qid = AP_MKQID(i, ap_domain_index); | |
1350 | dev = bus_find_device(&ap_bus_type, NULL, | |
1351 | (void *)(unsigned long)qid, | |
1352 | __ap_scan_bus); | |
889875a1 MS |
1353 | rc = ap_query_queue(qid, &queue_depth, &device_type, |
1354 | &device_functions); | |
c6a48264 RW |
1355 | if (dev) { |
1356 | ap_dev = to_ap_dev(dev); | |
1357 | spin_lock_bh(&ap_dev->lock); | |
c50a160c | 1358 | if (rc == -ENODEV || ap_dev->unregistered) { |
c6a48264 | 1359 | spin_unlock_bh(&ap_dev->lock); |
5314af69 FB |
1360 | if (ap_dev->unregistered) |
1361 | i--; | |
c6a48264 | 1362 | device_unregister(dev); |
af512ed0 | 1363 | put_device(dev); |
c6a48264 | 1364 | continue; |
af512ed0 RW |
1365 | } |
1366 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
1367 | put_device(dev); |
1368 | continue; | |
1369 | } | |
1534c382 MS |
1370 | if (rc) |
1371 | continue; | |
1372 | ap_dev = kzalloc(sizeof(*ap_dev), GFP_KERNEL); | |
1373 | if (!ap_dev) | |
1374 | break; | |
1375 | ap_dev->qid = qid; | |
c50a160c IT |
1376 | rc = ap_init_queue(ap_dev); |
1377 | if ((rc != 0) && (rc != -EBUSY)) { | |
1378 | kfree(ap_dev); | |
1379 | continue; | |
1380 | } | |
1534c382 | 1381 | ap_dev->queue_depth = queue_depth; |
6acbe21f MS |
1382 | ap_dev->raw_hwtype = device_type; |
1383 | ap_dev->device_type = device_type; | |
1384 | ap_dev->functions = device_functions; | |
4e56296d | 1385 | ap_dev->unregistered = 1; |
1534c382 MS |
1386 | spin_lock_init(&ap_dev->lock); |
1387 | INIT_LIST_HEAD(&ap_dev->pendingq); | |
1388 | INIT_LIST_HEAD(&ap_dev->requestq); | |
cf352ce0 | 1389 | INIT_LIST_HEAD(&ap_dev->list); |
af512ed0 RW |
1390 | setup_timer(&ap_dev->timeout, ap_request_timeout, |
1391 | (unsigned long) ap_dev); | |
6acbe21f | 1392 | if (ap_dev->device_type == 0) |
1e2076f4 | 1393 | /* device type probing for old cards */ |
cf2d007b HD |
1394 | if (ap_probe_device_type(ap_dev)) { |
1395 | kfree(ap_dev); | |
1396 | continue; | |
1397 | } | |
1e2076f4 | 1398 | |
1534c382 MS |
1399 | ap_dev->device.bus = &ap_bus_type; |
1400 | ap_dev->device.parent = ap_root_device; | |
edc44fa0 FB |
1401 | if (dev_set_name(&ap_dev->device, "card%02x", |
1402 | AP_QID_DEVICE(ap_dev->qid))) { | |
1403 | kfree(ap_dev); | |
1404 | continue; | |
1405 | } | |
1534c382 MS |
1406 | ap_dev->device.release = ap_device_release; |
1407 | rc = device_register(&ap_dev->device); | |
1408 | if (rc) { | |
c6304933 | 1409 | put_device(&ap_dev->device); |
1534c382 MS |
1410 | continue; |
1411 | } | |
1412 | /* Add device attributes. */ | |
1413 | rc = sysfs_create_group(&ap_dev->device.kobj, | |
1414 | &ap_dev_attr_group); | |
4e56296d RW |
1415 | if (!rc) { |
1416 | spin_lock_bh(&ap_dev->lock); | |
1417 | ap_dev->unregistered = 0; | |
1418 | spin_unlock_bh(&ap_dev->lock); | |
1419 | } | |
1420 | else | |
1534c382 MS |
1421 | device_unregister(&ap_dev->device); |
1422 | } | |
1423 | } | |
1424 | ||
1425 | static void | |
1426 | ap_config_timeout(unsigned long ptr) | |
1427 | { | |
1428 | queue_work(ap_work_queue, &ap_config_work); | |
1429 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1430 | add_timer(&ap_config_timer); | |
1431 | } | |
1432 | ||
1534c382 | 1433 | /** |
1749a81d | 1434 | * ap_poll_read(): Receive pending reply messages from an AP device. |
1534c382 MS |
1435 | * @ap_dev: pointer to the AP device |
1436 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1437 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1438 | * |
1534c382 MS |
1439 | * Returns 0 if the device is still present, -ENODEV if not. |
1440 | */ | |
4d284cac | 1441 | static int ap_poll_read(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1442 | { |
1443 | struct ap_queue_status status; | |
1444 | struct ap_message *ap_msg; | |
1445 | ||
1446 | if (ap_dev->queue_count <= 0) | |
1447 | return 0; | |
1448 | status = __ap_recv(ap_dev->qid, &ap_dev->reply->psmid, | |
1449 | ap_dev->reply->message, ap_dev->reply->length); | |
1450 | switch (status.response_code) { | |
1451 | case AP_RESPONSE_NORMAL: | |
c50a160c | 1452 | ap_dev->interrupt = status.int_enabled; |
1534c382 | 1453 | atomic_dec(&ap_poll_requests); |
af512ed0 | 1454 | ap_decrease_queue_count(ap_dev); |
1534c382 MS |
1455 | list_for_each_entry(ap_msg, &ap_dev->pendingq, list) { |
1456 | if (ap_msg->psmid != ap_dev->reply->psmid) | |
1457 | continue; | |
1458 | list_del_init(&ap_msg->list); | |
1459 | ap_dev->pendingq_count--; | |
54a8f561 | 1460 | ap_msg->receive(ap_dev, ap_msg, ap_dev->reply); |
1534c382 MS |
1461 | break; |
1462 | } | |
1463 | if (ap_dev->queue_count > 0) | |
1464 | *flags |= 1; | |
1465 | break; | |
1466 | case AP_RESPONSE_NO_PENDING_REPLY: | |
c50a160c | 1467 | ap_dev->interrupt = status.int_enabled; |
1534c382 MS |
1468 | if (status.queue_empty) { |
1469 | /* The card shouldn't forget requests but who knows. */ | |
e675c0d2 | 1470 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); |
1534c382 MS |
1471 | ap_dev->queue_count = 0; |
1472 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1473 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1474 | ap_dev->pendingq_count = 0; | |
1475 | } else | |
1476 | *flags |= 2; | |
1477 | break; | |
1478 | default: | |
1479 | return -ENODEV; | |
1480 | } | |
1481 | return 0; | |
1482 | } | |
1483 | ||
1484 | /** | |
1749a81d | 1485 | * ap_poll_write(): Send messages from the request queue to an AP device. |
1534c382 MS |
1486 | * @ap_dev: pointer to the AP device |
1487 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1488 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1489 | * |
1534c382 MS |
1490 | * Returns 0 if the device is still present, -ENODEV if not. |
1491 | */ | |
4d284cac | 1492 | static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1493 | { |
1494 | struct ap_queue_status status; | |
1495 | struct ap_message *ap_msg; | |
1496 | ||
1497 | if (ap_dev->requestq_count <= 0 || | |
c50a160c IT |
1498 | (ap_dev->queue_count >= ap_dev->queue_depth) || |
1499 | (ap_dev->reset == AP_RESET_IN_PROGRESS)) | |
1534c382 MS |
1500 | return 0; |
1501 | /* Start the next request on the queue. */ | |
1502 | ap_msg = list_entry(ap_dev->requestq.next, struct ap_message, list); | |
1503 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a | 1504 | ap_msg->message, ap_msg->length, ap_msg->special); |
1534c382 MS |
1505 | switch (status.response_code) { |
1506 | case AP_RESPONSE_NORMAL: | |
1507 | atomic_inc(&ap_poll_requests); | |
af512ed0 | 1508 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1509 | list_move_tail(&ap_msg->list, &ap_dev->pendingq); |
1510 | ap_dev->requestq_count--; | |
1511 | ap_dev->pendingq_count++; | |
1512 | if (ap_dev->queue_count < ap_dev->queue_depth && | |
1513 | ap_dev->requestq_count > 0) | |
1514 | *flags |= 1; | |
1515 | *flags |= 2; | |
1516 | break; | |
af512ed0 | 1517 | case AP_RESPONSE_RESET_IN_PROGRESS: |
bc615dea HD |
1518 | __ap_schedule_poll_timer(); |
1519 | case AP_RESPONSE_Q_FULL: | |
1534c382 MS |
1520 | *flags |= 2; |
1521 | break; | |
1522 | case AP_RESPONSE_MESSAGE_TOO_BIG: | |
a6a5d73a | 1523 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 MS |
1524 | return -EINVAL; |
1525 | default: | |
1526 | return -ENODEV; | |
1527 | } | |
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | /** | |
1749a81d | 1532 | * ap_poll_queue(): Poll AP device for pending replies and send new messages. |
c50a160c IT |
1533 | * Check if the queue has a pending reset. In case it's done re-enable |
1534 | * interrupts, otherwise reschedule the poll_timer for another attempt. | |
1534c382 MS |
1535 | * @ap_dev: pointer to the bus device |
1536 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1537 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d FB |
1538 | * |
1539 | * Poll AP device for pending replies and send new messages. If either | |
1540 | * ap_poll_read or ap_poll_write returns -ENODEV unregister the device. | |
1534c382 MS |
1541 | * Returns 0. |
1542 | */ | |
1543 | static inline int ap_poll_queue(struct ap_device *ap_dev, unsigned long *flags) | |
1544 | { | |
c50a160c | 1545 | struct ap_queue_status status; |
6acbe21f | 1546 | int rc; |
c50a160c IT |
1547 | |
1548 | if (ap_dev->reset == AP_RESET_IN_PROGRESS) { | |
6acbe21f | 1549 | status = ap_test_queue(ap_dev->qid, NULL); |
c50a160c IT |
1550 | switch (status.response_code) { |
1551 | case AP_RESPONSE_NORMAL: | |
1552 | ap_dev->reset = AP_RESET_IGNORE; | |
1553 | if (ap_using_interrupts()) { | |
1554 | rc = ap_queue_enable_interruption( | |
1555 | ap_dev, ap_airq.lsi_ptr); | |
1556 | if (!rc) | |
1557 | ap_dev->interrupt = AP_INTR_IN_PROGRESS; | |
1558 | else if (rc == -ENODEV) { | |
1559 | pr_err("Registering adapter interrupts for " | |
1560 | "AP %d failed\n", AP_QID_DEVICE(ap_dev->qid)); | |
1561 | return rc; | |
1562 | } | |
1563 | } | |
1564 | /* fall through */ | |
1565 | case AP_RESPONSE_BUSY: | |
1566 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
1567 | *flags |= AP_POLL_AFTER_TIMEOUT; | |
1568 | break; | |
1569 | case AP_RESPONSE_Q_NOT_AVAIL: | |
1570 | case AP_RESPONSE_DECONFIGURED: | |
1571 | case AP_RESPONSE_CHECKSTOPPED: | |
1572 | return -ENODEV; | |
1573 | default: | |
1574 | break; | |
1575 | } | |
1576 | } | |
1577 | ||
1578 | if ((ap_dev->reset != AP_RESET_IN_PROGRESS) && | |
1579 | (ap_dev->interrupt == AP_INTR_IN_PROGRESS)) { | |
6acbe21f | 1580 | status = ap_test_queue(ap_dev->qid, NULL); |
c50a160c IT |
1581 | if (ap_using_interrupts()) { |
1582 | if (status.int_enabled == 1) | |
1583 | ap_dev->interrupt = AP_INTR_ENABLED; | |
1584 | else | |
1585 | *flags |= AP_POLL_AFTER_TIMEOUT; | |
1586 | } else | |
1587 | ap_dev->interrupt = AP_INTR_DISABLED; | |
1588 | } | |
1534c382 MS |
1589 | |
1590 | rc = ap_poll_read(ap_dev, flags); | |
1591 | if (rc) | |
1592 | return rc; | |
1593 | return ap_poll_write(ap_dev, flags); | |
1594 | } | |
1595 | ||
1596 | /** | |
1749a81d | 1597 | * __ap_queue_message(): Queue a message to a device. |
1534c382 MS |
1598 | * @ap_dev: pointer to the AP device |
1599 | * @ap_msg: the message to be queued | |
1749a81d FB |
1600 | * |
1601 | * Queue a message to a device. Returns 0 if successful. | |
1534c382 MS |
1602 | */ |
1603 | static int __ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1604 | { | |
1605 | struct ap_queue_status status; | |
1606 | ||
1607 | if (list_empty(&ap_dev->requestq) && | |
c50a160c IT |
1608 | (ap_dev->queue_count < ap_dev->queue_depth) && |
1609 | (ap_dev->reset != AP_RESET_IN_PROGRESS)) { | |
1534c382 | 1610 | status = __ap_send(ap_dev->qid, ap_msg->psmid, |
a6a5d73a FB |
1611 | ap_msg->message, ap_msg->length, |
1612 | ap_msg->special); | |
1534c382 MS |
1613 | switch (status.response_code) { |
1614 | case AP_RESPONSE_NORMAL: | |
1615 | list_add_tail(&ap_msg->list, &ap_dev->pendingq); | |
1616 | atomic_inc(&ap_poll_requests); | |
1617 | ap_dev->pendingq_count++; | |
af512ed0 | 1618 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1619 | ap_dev->total_request_count++; |
1620 | break; | |
1621 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 1622 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 MS |
1623 | list_add_tail(&ap_msg->list, &ap_dev->requestq); |
1624 | ap_dev->requestq_count++; | |
1625 | ap_dev->total_request_count++; | |
1626 | return -EBUSY; | |
a6a5d73a | 1627 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 | 1628 | case AP_RESPONSE_MESSAGE_TOO_BIG: |
54a8f561 | 1629 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-EINVAL)); |
1534c382 MS |
1630 | return -EINVAL; |
1631 | default: /* Device is gone. */ | |
54a8f561 | 1632 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
1633 | return -ENODEV; |
1634 | } | |
1635 | } else { | |
1636 | list_add_tail(&ap_msg->list, &ap_dev->requestq); | |
1637 | ap_dev->requestq_count++; | |
1638 | ap_dev->total_request_count++; | |
1639 | return -EBUSY; | |
1640 | } | |
1641 | ap_schedule_poll_timer(); | |
1642 | return 0; | |
1643 | } | |
1644 | ||
1645 | void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1646 | { | |
1647 | unsigned long flags; | |
1648 | int rc; | |
1649 | ||
54a8f561 HD |
1650 | /* For asynchronous message handling a valid receive-callback |
1651 | * is required. */ | |
1652 | BUG_ON(!ap_msg->receive); | |
1653 | ||
1534c382 MS |
1654 | spin_lock_bh(&ap_dev->lock); |
1655 | if (!ap_dev->unregistered) { | |
1656 | /* Make room on the queue by polling for finished requests. */ | |
1657 | rc = ap_poll_queue(ap_dev, &flags); | |
1658 | if (!rc) | |
1659 | rc = __ap_queue_message(ap_dev, ap_msg); | |
1660 | if (!rc) | |
1661 | wake_up(&ap_poll_wait); | |
4e56296d RW |
1662 | if (rc == -ENODEV) |
1663 | ap_dev->unregistered = 1; | |
1534c382 | 1664 | } else { |
54a8f561 | 1665 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
c6a48264 | 1666 | rc = -ENODEV; |
1534c382 MS |
1667 | } |
1668 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
1669 | } |
1670 | EXPORT_SYMBOL(ap_queue_message); | |
1671 | ||
1672 | /** | |
1749a81d FB |
1673 | * ap_cancel_message(): Cancel a crypto request. |
1674 | * @ap_dev: The AP device that has the message queued | |
1675 | * @ap_msg: The message that is to be removed | |
1676 | * | |
1534c382 | 1677 | * Cancel a crypto request. This is done by removing the request |
1749a81d | 1678 | * from the device pending or request queue. Note that the |
1534c382 MS |
1679 | * request stays on the AP queue. When it finishes the message |
1680 | * reply will be discarded because the psmid can't be found. | |
1534c382 MS |
1681 | */ |
1682 | void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1683 | { | |
1684 | struct ap_message *tmp; | |
1685 | ||
1686 | spin_lock_bh(&ap_dev->lock); | |
1687 | if (!list_empty(&ap_msg->list)) { | |
1688 | list_for_each_entry(tmp, &ap_dev->pendingq, list) | |
1689 | if (tmp->psmid == ap_msg->psmid) { | |
1690 | ap_dev->pendingq_count--; | |
1691 | goto found; | |
1692 | } | |
1693 | ap_dev->requestq_count--; | |
1694 | found: | |
1695 | list_del_init(&ap_msg->list); | |
1696 | } | |
1697 | spin_unlock_bh(&ap_dev->lock); | |
1698 | } | |
1699 | EXPORT_SYMBOL(ap_cancel_message); | |
1700 | ||
1701 | /** | |
1749a81d | 1702 | * ap_poll_timeout(): AP receive polling for finished AP requests. |
fe137230 | 1703 | * @unused: Unused pointer. |
1749a81d | 1704 | * |
fe137230 | 1705 | * Schedules the AP tasklet using a high resolution timer. |
1534c382 | 1706 | */ |
fe137230 | 1707 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) |
1534c382 MS |
1708 | { |
1709 | tasklet_schedule(&ap_tasklet); | |
fe137230 | 1710 | return HRTIMER_NORESTART; |
1534c382 MS |
1711 | } |
1712 | ||
af512ed0 | 1713 | /** |
1749a81d FB |
1714 | * ap_reset(): Reset a not responding AP device. |
1715 | * @ap_dev: Pointer to the AP device | |
1716 | * | |
af512ed0 RW |
1717 | * Reset a not responding AP device and move all requests from the |
1718 | * pending queue to the request queue. | |
1719 | */ | |
c50a160c | 1720 | static void ap_reset(struct ap_device *ap_dev, unsigned long *flags) |
af512ed0 RW |
1721 | { |
1722 | int rc; | |
1723 | ||
af512ed0 RW |
1724 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); |
1725 | ap_dev->queue_count = 0; | |
1726 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1727 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1728 | ap_dev->pendingq_count = 0; | |
c50a160c | 1729 | rc = ap_init_queue(ap_dev); |
af512ed0 RW |
1730 | if (rc == -ENODEV) |
1731 | ap_dev->unregistered = 1; | |
75464960 | 1732 | else |
c50a160c | 1733 | *flags |= AP_POLL_AFTER_TIMEOUT; |
af512ed0 RW |
1734 | } |
1735 | ||
43c207e6 | 1736 | static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 | 1737 | { |
1534c382 | 1738 | if (!ap_dev->unregistered) { |
c6a48264 | 1739 | if (ap_poll_queue(ap_dev, flags)) |
4e56296d | 1740 | ap_dev->unregistered = 1; |
af512ed0 | 1741 | if (ap_dev->reset == AP_RESET_DO) |
c50a160c | 1742 | ap_reset(ap_dev, flags); |
c6a48264 | 1743 | } |
1534c382 MS |
1744 | return 0; |
1745 | } | |
1746 | ||
1749a81d FB |
1747 | /** |
1748 | * ap_poll_all(): Poll all AP devices. | |
1749 | * @dummy: Unused variable | |
1750 | * | |
1751 | * Poll all AP devices on the bus in a round robin fashion. Continue | |
1752 | * polling until bit 2^0 of the control flags is not set. If bit 2^1 | |
1753 | * of the control flags has been set arm the poll timer. | |
1754 | */ | |
1534c382 MS |
1755 | static void ap_poll_all(unsigned long dummy) |
1756 | { | |
1757 | unsigned long flags; | |
cf352ce0 | 1758 | struct ap_device *ap_dev; |
1534c382 | 1759 | |
cb17a636 FB |
1760 | /* Reset the indicator if interrupts are used. Thus new interrupts can |
1761 | * be received. Doing it in the beginning of the tasklet is therefor | |
1762 | * important that no requests on any AP get lost. | |
1763 | */ | |
1764 | if (ap_using_interrupts()) | |
f4eae94f | 1765 | xchg(ap_airq.lsi_ptr, 0); |
1534c382 MS |
1766 | do { |
1767 | flags = 0; | |
43c207e6 | 1768 | spin_lock(&ap_device_list_lock); |
cf352ce0 | 1769 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1770 | spin_lock(&ap_dev->lock); |
43c207e6 | 1771 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1772 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1773 | } |
43c207e6 | 1774 | spin_unlock(&ap_device_list_lock); |
c50a160c IT |
1775 | } while (flags & AP_POLL_IMMEDIATELY); |
1776 | if (flags & AP_POLL_AFTER_TIMEOUT) | |
1777 | __ap_schedule_poll_timer(); | |
1534c382 MS |
1778 | } |
1779 | ||
1780 | /** | |
1749a81d FB |
1781 | * ap_poll_thread(): Thread that polls for finished requests. |
1782 | * @data: Unused pointer | |
1783 | * | |
1534c382 MS |
1784 | * AP bus poll thread. The purpose of this thread is to poll for |
1785 | * finished requests in a loop if there is a "free" cpu - that is | |
1786 | * a cpu that doesn't have anything better to do. The polling stops | |
1787 | * as soon as there is another task or if all messages have been | |
1788 | * delivered. | |
1789 | */ | |
1790 | static int ap_poll_thread(void *data) | |
1791 | { | |
1792 | DECLARE_WAITQUEUE(wait, current); | |
1793 | unsigned long flags; | |
1794 | int requests; | |
cf352ce0 | 1795 | struct ap_device *ap_dev; |
1534c382 | 1796 | |
8698a745 | 1797 | set_user_nice(current, MAX_NICE); |
1534c382 | 1798 | while (1) { |
772f5472 FB |
1799 | if (ap_suspend_flag) |
1800 | return 0; | |
1534c382 MS |
1801 | if (need_resched()) { |
1802 | schedule(); | |
1803 | continue; | |
1804 | } | |
1805 | add_wait_queue(&ap_poll_wait, &wait); | |
1806 | set_current_state(TASK_INTERRUPTIBLE); | |
1807 | if (kthread_should_stop()) | |
1808 | break; | |
1809 | requests = atomic_read(&ap_poll_requests); | |
1810 | if (requests <= 0) | |
1811 | schedule(); | |
1812 | set_current_state(TASK_RUNNING); | |
1813 | remove_wait_queue(&ap_poll_wait, &wait); | |
1814 | ||
1534c382 | 1815 | flags = 0; |
43c207e6 | 1816 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 1817 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1818 | spin_lock(&ap_dev->lock); |
43c207e6 | 1819 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1820 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1821 | } |
43c207e6 | 1822 | spin_unlock_bh(&ap_device_list_lock); |
1534c382 MS |
1823 | } |
1824 | set_current_state(TASK_RUNNING); | |
1825 | remove_wait_queue(&ap_poll_wait, &wait); | |
1826 | return 0; | |
1827 | } | |
1828 | ||
1829 | static int ap_poll_thread_start(void) | |
1830 | { | |
1831 | int rc; | |
1832 | ||
772f5472 | 1833 | if (ap_using_interrupts() || ap_suspend_flag) |
cb17a636 | 1834 | return 0; |
1534c382 MS |
1835 | mutex_lock(&ap_poll_thread_mutex); |
1836 | if (!ap_poll_kthread) { | |
1837 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
ba8da213 | 1838 | rc = PTR_RET(ap_poll_kthread); |
1534c382 MS |
1839 | if (rc) |
1840 | ap_poll_kthread = NULL; | |
1841 | } | |
1842 | else | |
1843 | rc = 0; | |
1844 | mutex_unlock(&ap_poll_thread_mutex); | |
1845 | return rc; | |
1846 | } | |
1847 | ||
1848 | static void ap_poll_thread_stop(void) | |
1849 | { | |
1850 | mutex_lock(&ap_poll_thread_mutex); | |
1851 | if (ap_poll_kthread) { | |
1852 | kthread_stop(ap_poll_kthread); | |
1853 | ap_poll_kthread = NULL; | |
1854 | } | |
1855 | mutex_unlock(&ap_poll_thread_mutex); | |
1856 | } | |
1857 | ||
af512ed0 | 1858 | /** |
1749a81d FB |
1859 | * ap_request_timeout(): Handling of request timeouts |
1860 | * @data: Holds the AP device. | |
1861 | * | |
1862 | * Handles request timeouts. | |
af512ed0 RW |
1863 | */ |
1864 | static void ap_request_timeout(unsigned long data) | |
1865 | { | |
1866 | struct ap_device *ap_dev = (struct ap_device *) data; | |
1867 | ||
cb17a636 | 1868 | if (ap_dev->reset == AP_RESET_ARMED) { |
af512ed0 | 1869 | ap_dev->reset = AP_RESET_DO; |
cb17a636 FB |
1870 | |
1871 | if (ap_using_interrupts()) | |
1872 | tasklet_schedule(&ap_tasklet); | |
1873 | } | |
af512ed0 RW |
1874 | } |
1875 | ||
13e742ba RW |
1876 | static void ap_reset_domain(void) |
1877 | { | |
1878 | int i; | |
1879 | ||
889875a1 MS |
1880 | if (ap_domain_index == -1 || !ap_test_config_domain(ap_domain_index)) |
1881 | return; | |
1882 | for (i = 0; i < AP_DEVICES; i++) | |
1883 | ap_reset_queue(AP_MKQID(i, ap_domain_index)); | |
13e742ba RW |
1884 | } |
1885 | ||
1886 | static void ap_reset_all(void) | |
85eca850 RW |
1887 | { |
1888 | int i, j; | |
1889 | ||
170387a8 IT |
1890 | for (i = 0; i < AP_DOMAINS; i++) { |
1891 | if (!ap_test_config_domain(i)) | |
1892 | continue; | |
1893 | for (j = 0; j < AP_DEVICES; j++) { | |
1894 | if (!ap_test_config_card_id(j)) | |
1895 | continue; | |
85eca850 | 1896 | ap_reset_queue(AP_MKQID(j, i)); |
170387a8 IT |
1897 | } |
1898 | } | |
85eca850 RW |
1899 | } |
1900 | ||
1901 | static struct reset_call ap_reset_call = { | |
13e742ba | 1902 | .fn = ap_reset_all, |
85eca850 RW |
1903 | }; |
1904 | ||
1534c382 | 1905 | /** |
1749a81d FB |
1906 | * ap_module_init(): The module initialization code. |
1907 | * | |
1908 | * Initializes the module. | |
1534c382 MS |
1909 | */ |
1910 | int __init ap_module_init(void) | |
1911 | { | |
889875a1 | 1912 | int max_domain_id; |
1534c382 MS |
1913 | int rc, i; |
1914 | ||
889875a1 MS |
1915 | if (ap_instructions_available() != 0) { |
1916 | pr_warn("The hardware system does not support AP instructions\n"); | |
1917 | return -ENODEV; | |
1918 | } | |
1919 | ||
1920 | /* Get AP configuration data if available */ | |
1921 | ap_init_configuration(); | |
1922 | ||
1923 | if (ap_configuration) | |
1924 | max_domain_id = ap_max_domain_id ? : (AP_DOMAINS - 1); | |
1925 | else | |
1926 | max_domain_id = 15; | |
1927 | if (ap_domain_index < -1 || ap_domain_index > max_domain_id) { | |
1928 | pr_warn("%d is not a valid cryptographic domain\n", | |
1929 | ap_domain_index); | |
1534c382 MS |
1930 | return -EINVAL; |
1931 | } | |
5314af69 FB |
1932 | /* In resume callback we need to know if the user had set the domain. |
1933 | * If so, we can not just reset it. | |
1934 | */ | |
1935 | if (ap_domain_index >= 0) | |
1936 | user_set_domain = 1; | |
1937 | ||
cb17a636 | 1938 | if (ap_interrupts_available()) { |
f4eae94f MS |
1939 | rc = register_adapter_interrupt(&ap_airq); |
1940 | ap_airq_flag = (rc == 0); | |
cb17a636 FB |
1941 | } |
1942 | ||
85eca850 | 1943 | register_reset_call(&ap_reset_call); |
1534c382 MS |
1944 | |
1945 | /* Create /sys/bus/ap. */ | |
1946 | rc = bus_register(&ap_bus_type); | |
1947 | if (rc) | |
1948 | goto out; | |
1949 | for (i = 0; ap_bus_attrs[i]; i++) { | |
1950 | rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]); | |
1951 | if (rc) | |
1952 | goto out_bus; | |
1953 | } | |
1954 | ||
1955 | /* Create /sys/devices/ap. */ | |
035da16f | 1956 | ap_root_device = root_device_register("ap"); |
ba8da213 | 1957 | rc = PTR_RET(ap_root_device); |
1534c382 MS |
1958 | if (rc) |
1959 | goto out_bus; | |
1960 | ||
1961 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
1962 | if (!ap_work_queue) { | |
1963 | rc = -ENOMEM; | |
1964 | goto out_root; | |
1965 | } | |
1966 | ||
1967 | if (ap_select_domain() == 0) | |
1968 | ap_scan_bus(NULL); | |
1969 | ||
1749a81d | 1970 | /* Setup the AP bus rescan timer. */ |
1534c382 MS |
1971 | init_timer(&ap_config_timer); |
1972 | ap_config_timer.function = ap_config_timeout; | |
1973 | ap_config_timer.data = 0; | |
1974 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1975 | add_timer(&ap_config_timer); | |
1976 | ||
fe137230 FB |
1977 | /* Setup the high resultion poll timer. |
1978 | * If we are running under z/VM adjust polling to z/VM polling rate. | |
1979 | */ | |
1980 | if (MACHINE_IS_VM) | |
1981 | poll_timeout = 1500000; | |
93521314 | 1982 | spin_lock_init(&ap_poll_timer_lock); |
fe137230 FB |
1983 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
1984 | ap_poll_timer.function = ap_poll_timeout; | |
1985 | ||
1534c382 MS |
1986 | /* Start the low priority AP bus poll thread. */ |
1987 | if (ap_thread_flag) { | |
1988 | rc = ap_poll_thread_start(); | |
1989 | if (rc) | |
1990 | goto out_work; | |
1991 | } | |
1992 | ||
1993 | return 0; | |
1994 | ||
1995 | out_work: | |
1996 | del_timer_sync(&ap_config_timer); | |
fe137230 | 1997 | hrtimer_cancel(&ap_poll_timer); |
1534c382 MS |
1998 | destroy_workqueue(ap_work_queue); |
1999 | out_root: | |
035da16f | 2000 | root_device_unregister(ap_root_device); |
1534c382 MS |
2001 | out_bus: |
2002 | while (i--) | |
2003 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
2004 | bus_unregister(&ap_bus_type); | |
2005 | out: | |
85eca850 | 2006 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
2007 | if (ap_using_interrupts()) |
2008 | unregister_adapter_interrupt(&ap_airq); | |
889875a1 | 2009 | kfree(ap_configuration); |
1534c382 MS |
2010 | return rc; |
2011 | } | |
2012 | ||
2013 | static int __ap_match_all(struct device *dev, void *data) | |
2014 | { | |
2015 | return 1; | |
2016 | } | |
2017 | ||
2018 | /** | |
1749a81d FB |
2019 | * ap_modules_exit(): The module termination code |
2020 | * | |
2021 | * Terminates the module. | |
1534c382 MS |
2022 | */ |
2023 | void ap_module_exit(void) | |
2024 | { | |
2025 | int i; | |
2026 | struct device *dev; | |
2027 | ||
13e742ba | 2028 | ap_reset_domain(); |
1534c382 MS |
2029 | ap_poll_thread_stop(); |
2030 | del_timer_sync(&ap_config_timer); | |
fe137230 | 2031 | hrtimer_cancel(&ap_poll_timer); |
1534c382 | 2032 | destroy_workqueue(ap_work_queue); |
13e742ba | 2033 | tasklet_kill(&ap_tasklet); |
1534c382 MS |
2034 | while ((dev = bus_find_device(&ap_bus_type, NULL, NULL, |
2035 | __ap_match_all))) | |
2036 | { | |
2037 | device_unregister(dev); | |
2038 | put_device(dev); | |
2039 | } | |
2040 | for (i = 0; ap_bus_attrs[i]; i++) | |
2041 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
f60b8d44 | 2042 | root_device_unregister(ap_root_device); |
1534c382 | 2043 | bus_unregister(&ap_bus_type); |
889875a1 | 2044 | kfree(ap_configuration); |
85eca850 | 2045 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
2046 | if (ap_using_interrupts()) |
2047 | unregister_adapter_interrupt(&ap_airq); | |
1534c382 MS |
2048 | } |
2049 | ||
1534c382 MS |
2050 | module_init(ap_module_init); |
2051 | module_exit(ap_module_exit); |