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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> |
1534c382 MS |
47 | |
48 | #include "ap_bus.h" | |
49 | ||
50 | /* Some prototypes. */ | |
4927b3f7 | 51 | static void ap_scan_bus(struct work_struct *); |
1534c382 | 52 | static void ap_poll_all(unsigned long); |
fe137230 | 53 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *); |
1534c382 MS |
54 | static int ap_poll_thread_start(void); |
55 | static void ap_poll_thread_stop(void); | |
af512ed0 | 56 | static void ap_request_timeout(unsigned long); |
cb17a636 | 57 | static inline void ap_schedule_poll_timer(void); |
772f5472 FB |
58 | static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags); |
59 | static int ap_device_remove(struct device *dev); | |
60 | static int ap_device_probe(struct device *dev); | |
61 | static void ap_interrupt_handler(void *unused1, void *unused2); | |
62 | static void ap_reset(struct ap_device *ap_dev); | |
63 | static void ap_config_timeout(unsigned long ptr); | |
5314af69 | 64 | static int ap_select_domain(void); |
75014550 | 65 | static void ap_query_configuration(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 MS |
73 | MODULE_LICENSE("GPL"); |
74 | ||
1749a81d | 75 | /* |
1534c382 MS |
76 | * Module parameter |
77 | */ | |
78 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ | |
79 | module_param_named(domain, ap_domain_index, int, 0000); | |
80 | MODULE_PARM_DESC(domain, "domain index for ap devices"); | |
81 | EXPORT_SYMBOL(ap_domain_index); | |
82 | ||
b90b34c6 | 83 | static int ap_thread_flag = 0; |
1534c382 | 84 | module_param_named(poll_thread, ap_thread_flag, int, 0000); |
b90b34c6 | 85 | MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)."); |
1534c382 MS |
86 | |
87 | static struct device *ap_root_device = NULL; | |
75014550 | 88 | static struct ap_config_info *ap_configuration; |
43c207e6 | 89 | static DEFINE_SPINLOCK(ap_device_list_lock); |
cf352ce0 | 90 | static LIST_HEAD(ap_device_list); |
1534c382 | 91 | |
1749a81d | 92 | /* |
1534c382 MS |
93 | * Workqueue & timer for bus rescan. |
94 | */ | |
95 | static struct workqueue_struct *ap_work_queue; | |
96 | static struct timer_list ap_config_timer; | |
97 | static int ap_config_time = AP_CONFIG_TIME; | |
4927b3f7 | 98 | static DECLARE_WORK(ap_config_work, ap_scan_bus); |
1534c382 | 99 | |
1749a81d | 100 | /* |
cb17a636 | 101 | * Tasklet & timer for AP request polling and interrupts |
1534c382 | 102 | */ |
1534c382 MS |
103 | static DECLARE_TASKLET(ap_tasklet, ap_poll_all, 0); |
104 | static atomic_t ap_poll_requests = ATOMIC_INIT(0); | |
105 | static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait); | |
106 | static struct task_struct *ap_poll_kthread = NULL; | |
107 | static DEFINE_MUTEX(ap_poll_thread_mutex); | |
93521314 | 108 | static DEFINE_SPINLOCK(ap_poll_timer_lock); |
cb17a636 | 109 | static void *ap_interrupt_indicator; |
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; | |
5314af69 FB |
117 | /* Flag to check if domain was set through module parameter domain=. This is |
118 | * important when supsend and resume is done in a z/VM environment where the | |
119 | * domain might change. */ | |
120 | static int user_set_domain = 0; | |
772f5472 FB |
121 | static struct bus_type ap_bus_type; |
122 | ||
cb17a636 FB |
123 | /** |
124 | * ap_using_interrupts() - Returns non-zero if interrupt support is | |
125 | * available. | |
126 | */ | |
127 | static inline int ap_using_interrupts(void) | |
128 | { | |
129 | return ap_interrupt_indicator != NULL; | |
130 | } | |
131 | ||
1534c382 | 132 | /** |
1749a81d | 133 | * ap_intructions_available() - Test if AP instructions are available. |
1534c382 | 134 | * |
1749a81d | 135 | * Returns 0 if the AP instructions are installed. |
1534c382 MS |
136 | */ |
137 | static inline int ap_instructions_available(void) | |
138 | { | |
139 | register unsigned long reg0 asm ("0") = AP_MKQID(0,0); | |
140 | register unsigned long reg1 asm ("1") = -ENODEV; | |
141 | register unsigned long reg2 asm ("2") = 0UL; | |
142 | ||
143 | asm volatile( | |
144 | " .long 0xb2af0000\n" /* PQAP(TAPQ) */ | |
145 | "0: la %1,0\n" | |
146 | "1:\n" | |
147 | EX_TABLE(0b, 1b) | |
148 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) : : "cc" ); | |
149 | return reg1; | |
150 | } | |
151 | ||
cb17a636 FB |
152 | /** |
153 | * ap_interrupts_available(): Test if AP interrupts are available. | |
154 | * | |
155 | * Returns 1 if AP interrupts are available. | |
156 | */ | |
157 | static int ap_interrupts_available(void) | |
158 | { | |
53ec24b1 | 159 | return test_facility(2) && test_facility(65); |
cb17a636 FB |
160 | } |
161 | ||
75014550 HD |
162 | /** |
163 | * ap_configuration_available(): Test if AP configuration | |
164 | * information is available. | |
165 | * | |
166 | * Returns 1 if AP configuration information is available. | |
167 | */ | |
c80773e5 | 168 | #ifdef CONFIG_64BIT |
75014550 HD |
169 | static int ap_configuration_available(void) |
170 | { | |
171 | return test_facility(2) && test_facility(12); | |
172 | } | |
c80773e5 | 173 | #endif |
75014550 | 174 | |
1534c382 | 175 | /** |
1749a81d FB |
176 | * ap_test_queue(): Test adjunct processor queue. |
177 | * @qid: The AP queue number | |
178 | * @queue_depth: Pointer to queue depth value | |
179 | * @device_type: Pointer to device type value | |
1534c382 | 180 | * |
1749a81d | 181 | * Returns AP queue status structure. |
1534c382 MS |
182 | */ |
183 | static inline struct ap_queue_status | |
184 | ap_test_queue(ap_qid_t qid, int *queue_depth, int *device_type) | |
185 | { | |
186 | register unsigned long reg0 asm ("0") = qid; | |
187 | register struct ap_queue_status reg1 asm ("1"); | |
188 | register unsigned long reg2 asm ("2") = 0UL; | |
189 | ||
190 | asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ | |
191 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
192 | *device_type = (int) (reg2 >> 24); | |
193 | *queue_depth = (int) (reg2 & 0xff); | |
194 | return reg1; | |
195 | } | |
196 | ||
197 | /** | |
1749a81d FB |
198 | * ap_reset_queue(): Reset adjunct processor queue. |
199 | * @qid: The AP queue number | |
1534c382 | 200 | * |
1749a81d | 201 | * Returns AP queue status structure. |
1534c382 MS |
202 | */ |
203 | static inline struct ap_queue_status ap_reset_queue(ap_qid_t qid) | |
204 | { | |
205 | register unsigned long reg0 asm ("0") = qid | 0x01000000UL; | |
206 | register struct ap_queue_status reg1 asm ("1"); | |
207 | register unsigned long reg2 asm ("2") = 0UL; | |
208 | ||
209 | asm volatile( | |
210 | ".long 0xb2af0000" /* PQAP(RAPQ) */ | |
211 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
212 | return reg1; | |
213 | } | |
214 | ||
cb17a636 FB |
215 | #ifdef CONFIG_64BIT |
216 | /** | |
217 | * ap_queue_interruption_control(): Enable interruption for a specific AP. | |
218 | * @qid: The AP queue number | |
219 | * @ind: The notification indicator byte | |
220 | * | |
221 | * Returns AP queue status. | |
222 | */ | |
223 | static inline struct ap_queue_status | |
224 | ap_queue_interruption_control(ap_qid_t qid, void *ind) | |
225 | { | |
226 | register unsigned long reg0 asm ("0") = qid | 0x03000000UL; | |
227 | register unsigned long reg1_in asm ("1") = 0x0000800000000000UL | AP_ISC; | |
228 | register struct ap_queue_status reg1_out asm ("1"); | |
229 | register void *reg2 asm ("2") = ind; | |
230 | asm volatile( | |
a7475afd | 231 | ".long 0xb2af0000" /* PQAP(AQIC) */ |
cb17a636 FB |
232 | : "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2) |
233 | : | |
234 | : "cc" ); | |
235 | return reg1_out; | |
236 | } | |
237 | #endif | |
238 | ||
6bed05bc HD |
239 | #ifdef CONFIG_64BIT |
240 | static inline struct ap_queue_status | |
241 | __ap_query_functions(ap_qid_t qid, unsigned int *functions) | |
b1f933da FB |
242 | { |
243 | register unsigned long reg0 asm ("0") = 0UL | qid | (1UL << 23); | |
6bed05bc HD |
244 | register struct ap_queue_status reg1 asm ("1") = AP_QUEUE_STATUS_INVALID; |
245 | register unsigned long reg2 asm ("2"); | |
b1f933da FB |
246 | |
247 | asm volatile( | |
a7475afd | 248 | ".long 0xb2af0000\n" /* PQAP(TAPQ) */ |
6bed05bc HD |
249 | "0:\n" |
250 | EX_TABLE(0b, 0b) | |
251 | : "+d" (reg0), "+d" (reg1), "=d" (reg2) | |
b1f933da FB |
252 | : |
253 | : "cc"); | |
254 | ||
6bed05bc | 255 | *functions = (unsigned int)(reg2 >> 32); |
b1f933da FB |
256 | return reg1; |
257 | } | |
6bed05bc | 258 | #endif |
b1f933da | 259 | |
75014550 HD |
260 | #ifdef CONFIG_64BIT |
261 | static inline int __ap_query_configuration(struct ap_config_info *config) | |
262 | { | |
263 | register unsigned long reg0 asm ("0") = 0x04000000UL; | |
264 | register unsigned long reg1 asm ("1") = -EINVAL; | |
265 | register unsigned char *reg2 asm ("2") = (unsigned char *)config; | |
266 | ||
267 | asm volatile( | |
268 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
269 | "0: la %1,0\n" | |
270 | "1:\n" | |
271 | EX_TABLE(0b, 1b) | |
272 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) | |
273 | : | |
274 | : "cc"); | |
275 | ||
276 | return reg1; | |
277 | } | |
278 | #endif | |
279 | ||
b1f933da | 280 | /** |
6bed05bc | 281 | * ap_query_functions(): Query supported functions. |
b1f933da | 282 | * @qid: The AP queue number |
6bed05bc | 283 | * @functions: Pointer to functions field. |
b1f933da | 284 | * |
6bed05bc HD |
285 | * Returns |
286 | * 0 on success. | |
287 | * -ENODEV if queue not valid. | |
288 | * -EBUSY if device busy. | |
289 | * -EINVAL if query function is not supported | |
b1f933da | 290 | */ |
6bed05bc | 291 | static int ap_query_functions(ap_qid_t qid, unsigned int *functions) |
b1f933da | 292 | { |
6bed05bc | 293 | #ifdef CONFIG_64BIT |
b1f933da | 294 | struct ap_queue_status status; |
6bed05bc HD |
295 | int i; |
296 | status = __ap_query_functions(qid, functions); | |
b1f933da FB |
297 | |
298 | for (i = 0; i < AP_MAX_RESET; i++) { | |
6bed05bc HD |
299 | if (ap_queue_status_invalid_test(&status)) |
300 | return -ENODEV; | |
301 | ||
b1f933da FB |
302 | switch (status.response_code) { |
303 | case AP_RESPONSE_NORMAL: | |
6bed05bc | 304 | return 0; |
b1f933da FB |
305 | case AP_RESPONSE_RESET_IN_PROGRESS: |
306 | case AP_RESPONSE_BUSY: | |
307 | break; | |
308 | case AP_RESPONSE_Q_NOT_AVAIL: | |
309 | case AP_RESPONSE_DECONFIGURED: | |
310 | case AP_RESPONSE_CHECKSTOPPED: | |
311 | case AP_RESPONSE_INVALID_ADDRESS: | |
6bed05bc | 312 | return -ENODEV; |
b1f933da FB |
313 | case AP_RESPONSE_OTHERWISE_CHANGED: |
314 | break; | |
315 | default: | |
316 | break; | |
317 | } | |
318 | if (i < AP_MAX_RESET - 1) { | |
319 | udelay(5); | |
6bed05bc | 320 | status = __ap_query_functions(qid, functions); |
b1f933da FB |
321 | } |
322 | } | |
6bed05bc HD |
323 | return -EBUSY; |
324 | #else | |
325 | return -EINVAL; | |
326 | #endif | |
327 | } | |
328 | ||
cb17a636 FB |
329 | /** |
330 | * ap_queue_enable_interruption(): Enable interruption on an AP. | |
331 | * @qid: The AP queue number | |
332 | * @ind: the notification indicator byte | |
333 | * | |
334 | * Enables interruption on AP queue via ap_queue_interruption_control(). Based | |
335 | * on the return value it waits a while and tests the AP queue if interrupts | |
336 | * have been switched on using ap_test_queue(). | |
337 | */ | |
338 | static int ap_queue_enable_interruption(ap_qid_t qid, void *ind) | |
339 | { | |
340 | #ifdef CONFIG_64BIT | |
341 | struct ap_queue_status status; | |
342 | int t_depth, t_device_type, rc, i; | |
343 | ||
344 | rc = -EBUSY; | |
345 | status = ap_queue_interruption_control(qid, ind); | |
346 | ||
347 | for (i = 0; i < AP_MAX_RESET; i++) { | |
348 | switch (status.response_code) { | |
349 | case AP_RESPONSE_NORMAL: | |
350 | if (status.int_enabled) | |
351 | return 0; | |
352 | break; | |
353 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
354 | case AP_RESPONSE_BUSY: | |
8738e07d HD |
355 | if (i < AP_MAX_RESET - 1) { |
356 | udelay(5); | |
357 | status = ap_queue_interruption_control(qid, | |
358 | ind); | |
359 | continue; | |
360 | } | |
cb17a636 FB |
361 | break; |
362 | case AP_RESPONSE_Q_NOT_AVAIL: | |
363 | case AP_RESPONSE_DECONFIGURED: | |
364 | case AP_RESPONSE_CHECKSTOPPED: | |
365 | case AP_RESPONSE_INVALID_ADDRESS: | |
366 | return -ENODEV; | |
367 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
368 | if (status.int_enabled) | |
369 | return 0; | |
370 | break; | |
371 | default: | |
372 | break; | |
373 | } | |
374 | if (i < AP_MAX_RESET - 1) { | |
375 | udelay(5); | |
376 | status = ap_test_queue(qid, &t_depth, &t_device_type); | |
377 | } | |
378 | } | |
379 | return rc; | |
380 | #else | |
381 | return -EINVAL; | |
382 | #endif | |
383 | } | |
384 | ||
1534c382 | 385 | /** |
1749a81d FB |
386 | * __ap_send(): Send message to adjunct processor queue. |
387 | * @qid: The AP queue number | |
388 | * @psmid: The program supplied message identifier | |
389 | * @msg: The message text | |
390 | * @length: The message length | |
a6a5d73a | 391 | * @special: Special Bit |
1534c382 | 392 | * |
1749a81d | 393 | * Returns AP queue status structure. |
1534c382 | 394 | * Condition code 1 on NQAP can't happen because the L bit is 1. |
1534c382 MS |
395 | * Condition code 2 on NQAP also means the send is incomplete, |
396 | * because a segment boundary was reached. The NQAP is repeated. | |
397 | */ | |
398 | static inline struct ap_queue_status | |
a6a5d73a FB |
399 | __ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length, |
400 | unsigned int special) | |
1534c382 MS |
401 | { |
402 | typedef struct { char _[length]; } msgblock; | |
403 | register unsigned long reg0 asm ("0") = qid | 0x40000000UL; | |
404 | register struct ap_queue_status reg1 asm ("1"); | |
405 | register unsigned long reg2 asm ("2") = (unsigned long) msg; | |
406 | register unsigned long reg3 asm ("3") = (unsigned long) length; | |
407 | register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32); | |
408 | register unsigned long reg5 asm ("5") = (unsigned int) psmid; | |
409 | ||
a6a5d73a FB |
410 | if (special == 1) |
411 | reg0 |= 0x400000UL; | |
412 | ||
1534c382 | 413 | asm volatile ( |
a7475afd | 414 | "0: .long 0xb2ad0042\n" /* NQAP */ |
1534c382 MS |
415 | " brc 2,0b" |
416 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) | |
417 | : "d" (reg4), "d" (reg5), "m" (*(msgblock *) msg) | |
418 | : "cc" ); | |
419 | return reg1; | |
420 | } | |
421 | ||
422 | int ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) | |
423 | { | |
424 | struct ap_queue_status status; | |
425 | ||
a6a5d73a | 426 | status = __ap_send(qid, psmid, msg, length, 0); |
1534c382 MS |
427 | switch (status.response_code) { |
428 | case AP_RESPONSE_NORMAL: | |
429 | return 0; | |
430 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 431 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 | 432 | return -EBUSY; |
a6a5d73a FB |
433 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
434 | return -EINVAL; | |
1534c382 MS |
435 | default: /* Device is gone. */ |
436 | return -ENODEV; | |
437 | } | |
438 | } | |
439 | EXPORT_SYMBOL(ap_send); | |
440 | ||
1749a81d FB |
441 | /** |
442 | * __ap_recv(): Receive message from adjunct processor queue. | |
443 | * @qid: The AP queue number | |
444 | * @psmid: Pointer to program supplied message identifier | |
445 | * @msg: The message text | |
446 | * @length: The message length | |
1534c382 | 447 | * |
1749a81d | 448 | * Returns AP queue status structure. |
1534c382 MS |
449 | * Condition code 1 on DQAP means the receive has taken place |
450 | * but only partially. The response is incomplete, hence the | |
451 | * DQAP is repeated. | |
1534c382 MS |
452 | * Condition code 2 on DQAP also means the receive is incomplete, |
453 | * this time because a segment boundary was reached. Again, the | |
454 | * DQAP is repeated. | |
1534c382 MS |
455 | * Note that gpr2 is used by the DQAP instruction to keep track of |
456 | * any 'residual' length, in case the instruction gets interrupted. | |
457 | * Hence it gets zeroed before the instruction. | |
458 | */ | |
459 | static inline struct ap_queue_status | |
460 | __ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
461 | { | |
462 | typedef struct { char _[length]; } msgblock; | |
463 | register unsigned long reg0 asm("0") = qid | 0x80000000UL; | |
464 | register struct ap_queue_status reg1 asm ("1"); | |
465 | register unsigned long reg2 asm("2") = 0UL; | |
466 | register unsigned long reg4 asm("4") = (unsigned long) msg; | |
467 | register unsigned long reg5 asm("5") = (unsigned long) length; | |
468 | register unsigned long reg6 asm("6") = 0UL; | |
469 | register unsigned long reg7 asm("7") = 0UL; | |
470 | ||
471 | ||
472 | asm volatile( | |
a7475afd | 473 | "0: .long 0xb2ae0064\n" /* DQAP */ |
1534c382 MS |
474 | " brc 6,0b\n" |
475 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), | |
476 | "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7), | |
477 | "=m" (*(msgblock *) msg) : : "cc" ); | |
478 | *psmid = (((unsigned long long) reg6) << 32) + reg7; | |
479 | return reg1; | |
480 | } | |
481 | ||
482 | int ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
483 | { | |
484 | struct ap_queue_status status; | |
485 | ||
486 | status = __ap_recv(qid, psmid, msg, length); | |
487 | switch (status.response_code) { | |
488 | case AP_RESPONSE_NORMAL: | |
489 | return 0; | |
490 | case AP_RESPONSE_NO_PENDING_REPLY: | |
491 | if (status.queue_empty) | |
492 | return -ENOENT; | |
493 | return -EBUSY; | |
af512ed0 RW |
494 | case AP_RESPONSE_RESET_IN_PROGRESS: |
495 | return -EBUSY; | |
1534c382 MS |
496 | default: |
497 | return -ENODEV; | |
498 | } | |
499 | } | |
500 | EXPORT_SYMBOL(ap_recv); | |
501 | ||
502 | /** | |
1749a81d FB |
503 | * ap_query_queue(): Check if an AP queue is available. |
504 | * @qid: The AP queue number | |
505 | * @queue_depth: Pointer to queue depth value | |
506 | * @device_type: Pointer to device type value | |
507 | * | |
508 | * The test is repeated for AP_MAX_RESET times. | |
1534c382 MS |
509 | */ |
510 | static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type) | |
511 | { | |
512 | struct ap_queue_status status; | |
513 | int t_depth, t_device_type, rc, i; | |
514 | ||
515 | rc = -EBUSY; | |
516 | for (i = 0; i < AP_MAX_RESET; i++) { | |
517 | status = ap_test_queue(qid, &t_depth, &t_device_type); | |
518 | switch (status.response_code) { | |
519 | case AP_RESPONSE_NORMAL: | |
520 | *queue_depth = t_depth + 1; | |
521 | *device_type = t_device_type; | |
522 | rc = 0; | |
523 | break; | |
524 | case AP_RESPONSE_Q_NOT_AVAIL: | |
525 | rc = -ENODEV; | |
526 | break; | |
527 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
528 | break; | |
529 | case AP_RESPONSE_DECONFIGURED: | |
530 | rc = -ENODEV; | |
531 | break; | |
532 | case AP_RESPONSE_CHECKSTOPPED: | |
533 | rc = -ENODEV; | |
534 | break; | |
cb17a636 FB |
535 | case AP_RESPONSE_INVALID_ADDRESS: |
536 | rc = -ENODEV; | |
537 | break; | |
538 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
539 | break; | |
1534c382 MS |
540 | case AP_RESPONSE_BUSY: |
541 | break; | |
542 | default: | |
543 | BUG(); | |
544 | } | |
545 | if (rc != -EBUSY) | |
546 | break; | |
547 | if (i < AP_MAX_RESET - 1) | |
548 | udelay(5); | |
549 | } | |
550 | return rc; | |
551 | } | |
552 | ||
553 | /** | |
1749a81d FB |
554 | * ap_init_queue(): Reset an AP queue. |
555 | * @qid: The AP queue number | |
556 | * | |
1534c382 | 557 | * Reset an AP queue and wait for it to become available again. |
1534c382 MS |
558 | */ |
559 | static int ap_init_queue(ap_qid_t qid) | |
560 | { | |
561 | struct ap_queue_status status; | |
562 | int rc, dummy, i; | |
563 | ||
564 | rc = -ENODEV; | |
565 | status = ap_reset_queue(qid); | |
566 | for (i = 0; i < AP_MAX_RESET; i++) { | |
567 | switch (status.response_code) { | |
568 | case AP_RESPONSE_NORMAL: | |
569 | if (status.queue_empty) | |
570 | rc = 0; | |
571 | break; | |
572 | case AP_RESPONSE_Q_NOT_AVAIL: | |
573 | case AP_RESPONSE_DECONFIGURED: | |
574 | case AP_RESPONSE_CHECKSTOPPED: | |
575 | i = AP_MAX_RESET; /* return with -ENODEV */ | |
576 | break; | |
577 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
af512ed0 | 578 | rc = -EBUSY; |
1534c382 MS |
579 | case AP_RESPONSE_BUSY: |
580 | default: | |
581 | break; | |
582 | } | |
af512ed0 | 583 | if (rc != -ENODEV && rc != -EBUSY) |
1534c382 MS |
584 | break; |
585 | if (i < AP_MAX_RESET - 1) { | |
586 | udelay(5); | |
587 | status = ap_test_queue(qid, &dummy, &dummy); | |
588 | } | |
589 | } | |
cb17a636 FB |
590 | if (rc == 0 && ap_using_interrupts()) { |
591 | rc = ap_queue_enable_interruption(qid, ap_interrupt_indicator); | |
592 | /* If interruption mode is supported by the machine, | |
593 | * but an AP can not be enabled for interruption then | |
594 | * the AP will be discarded. */ | |
595 | if (rc) | |
596 | pr_err("Registering adapter interrupts for " | |
597 | "AP %d failed\n", AP_QID_DEVICE(qid)); | |
598 | } | |
1534c382 MS |
599 | return rc; |
600 | } | |
601 | ||
af512ed0 | 602 | /** |
1749a81d FB |
603 | * ap_increase_queue_count(): Arm request timeout. |
604 | * @ap_dev: Pointer to an AP device. | |
605 | * | |
606 | * Arm request timeout if an AP device was idle and a new request is submitted. | |
af512ed0 RW |
607 | */ |
608 | static void ap_increase_queue_count(struct ap_device *ap_dev) | |
609 | { | |
610 | int timeout = ap_dev->drv->request_timeout; | |
611 | ||
612 | ap_dev->queue_count++; | |
613 | if (ap_dev->queue_count == 1) { | |
614 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
615 | ap_dev->reset = AP_RESET_ARMED; | |
616 | } | |
617 | } | |
618 | ||
619 | /** | |
1749a81d FB |
620 | * ap_decrease_queue_count(): Decrease queue count. |
621 | * @ap_dev: Pointer to an AP device. | |
622 | * | |
623 | * If AP device is still alive, re-schedule request timeout if there are still | |
af512ed0 RW |
624 | * pending requests. |
625 | */ | |
626 | static void ap_decrease_queue_count(struct ap_device *ap_dev) | |
627 | { | |
628 | int timeout = ap_dev->drv->request_timeout; | |
629 | ||
630 | ap_dev->queue_count--; | |
631 | if (ap_dev->queue_count > 0) | |
632 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
633 | else | |
1749a81d | 634 | /* |
af512ed0 RW |
635 | * The timeout timer should to be disabled now - since |
636 | * del_timer_sync() is very expensive, we just tell via the | |
637 | * reset flag to ignore the pending timeout timer. | |
638 | */ | |
639 | ap_dev->reset = AP_RESET_IGNORE; | |
640 | } | |
641 | ||
1749a81d | 642 | /* |
1534c382 MS |
643 | * AP device related attributes. |
644 | */ | |
645 | static ssize_t ap_hwtype_show(struct device *dev, | |
646 | struct device_attribute *attr, char *buf) | |
647 | { | |
648 | struct ap_device *ap_dev = to_ap_dev(dev); | |
649 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->device_type); | |
650 | } | |
1534c382 | 651 | |
43c207e6 | 652 | static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL); |
1534c382 MS |
653 | static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr, |
654 | char *buf) | |
655 | { | |
656 | struct ap_device *ap_dev = to_ap_dev(dev); | |
657 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->queue_depth); | |
658 | } | |
1534c382 | 659 | |
43c207e6 | 660 | static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL); |
1534c382 MS |
661 | static ssize_t ap_request_count_show(struct device *dev, |
662 | struct device_attribute *attr, | |
663 | 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->total_request_count); | |
670 | spin_unlock_bh(&ap_dev->lock); | |
671 | return rc; | |
672 | } | |
673 | ||
674 | static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL); | |
675 | ||
b26bd941 HD |
676 | static ssize_t ap_requestq_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->requestq_count); | |
684 | spin_unlock_bh(&ap_dev->lock); | |
685 | return rc; | |
686 | } | |
687 | ||
688 | static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL); | |
689 | ||
690 | static ssize_t ap_pendingq_count_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; | |
695 | ||
696 | spin_lock_bh(&ap_dev->lock); | |
697 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->pendingq_count); | |
698 | spin_unlock_bh(&ap_dev->lock); | |
699 | return rc; | |
700 | } | |
701 | ||
702 | static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL); | |
703 | ||
1534c382 MS |
704 | static ssize_t ap_modalias_show(struct device *dev, |
705 | struct device_attribute *attr, char *buf) | |
706 | { | |
707 | return sprintf(buf, "ap:t%02X", to_ap_dev(dev)->device_type); | |
708 | } | |
709 | ||
710 | static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL); | |
711 | ||
b26bd941 HD |
712 | static ssize_t ap_functions_show(struct device *dev, |
713 | struct device_attribute *attr, char *buf) | |
714 | { | |
715 | struct ap_device *ap_dev = to_ap_dev(dev); | |
716 | return snprintf(buf, PAGE_SIZE, "0x%08X\n", ap_dev->functions); | |
717 | } | |
718 | ||
719 | static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL); | |
720 | ||
1534c382 MS |
721 | static struct attribute *ap_dev_attrs[] = { |
722 | &dev_attr_hwtype.attr, | |
723 | &dev_attr_depth.attr, | |
724 | &dev_attr_request_count.attr, | |
b26bd941 HD |
725 | &dev_attr_requestq_count.attr, |
726 | &dev_attr_pendingq_count.attr, | |
1534c382 | 727 | &dev_attr_modalias.attr, |
b26bd941 | 728 | &dev_attr_ap_functions.attr, |
1534c382 MS |
729 | NULL |
730 | }; | |
731 | static struct attribute_group ap_dev_attr_group = { | |
732 | .attrs = ap_dev_attrs | |
733 | }; | |
734 | ||
735 | /** | |
1749a81d FB |
736 | * ap_bus_match() |
737 | * @dev: Pointer to device | |
738 | * @drv: Pointer to device_driver | |
739 | * | |
1534c382 MS |
740 | * AP bus driver registration/unregistration. |
741 | */ | |
742 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
743 | { | |
744 | struct ap_device *ap_dev = to_ap_dev(dev); | |
745 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
746 | struct ap_device_id *id; | |
747 | ||
1749a81d | 748 | /* |
1534c382 MS |
749 | * Compare device type of the device with the list of |
750 | * supported types of the device_driver. | |
751 | */ | |
752 | for (id = ap_drv->ids; id->match_flags; id++) { | |
753 | if ((id->match_flags & AP_DEVICE_ID_MATCH_DEVICE_TYPE) && | |
754 | (id->dev_type != ap_dev->device_type)) | |
755 | continue; | |
756 | return 1; | |
757 | } | |
758 | return 0; | |
759 | } | |
760 | ||
761 | /** | |
1749a81d FB |
762 | * ap_uevent(): Uevent function for AP devices. |
763 | * @dev: Pointer to device | |
764 | * @env: Pointer to kobj_uevent_env | |
765 | * | |
766 | * It sets up a single environment variable DEV_TYPE which contains the | |
767 | * hardware device type. | |
1534c382 | 768 | */ |
7eff2e7a | 769 | static int ap_uevent (struct device *dev, struct kobj_uevent_env *env) |
1534c382 MS |
770 | { |
771 | struct ap_device *ap_dev = to_ap_dev(dev); | |
7eff2e7a | 772 | int retval = 0; |
1534c382 MS |
773 | |
774 | if (!ap_dev) | |
775 | return -ENODEV; | |
776 | ||
777 | /* Set up DEV_TYPE environment variable. */ | |
7eff2e7a | 778 | retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); |
bf62456e ER |
779 | if (retval) |
780 | return retval; | |
781 | ||
66a4263b | 782 | /* Add MODALIAS= */ |
7eff2e7a | 783 | retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); |
bf62456e | 784 | |
bf62456e | 785 | return retval; |
1534c382 MS |
786 | } |
787 | ||
772f5472 FB |
788 | static int ap_bus_suspend(struct device *dev, pm_message_t state) |
789 | { | |
790 | struct ap_device *ap_dev = to_ap_dev(dev); | |
791 | unsigned long flags; | |
792 | ||
793 | if (!ap_suspend_flag) { | |
794 | ap_suspend_flag = 1; | |
795 | ||
796 | /* Disable scanning for devices, thus we do not want to scan | |
797 | * for them after removing. | |
798 | */ | |
799 | del_timer_sync(&ap_config_timer); | |
800 | if (ap_work_queue != NULL) { | |
801 | destroy_workqueue(ap_work_queue); | |
802 | ap_work_queue = NULL; | |
803 | } | |
5314af69 | 804 | |
772f5472 FB |
805 | tasklet_disable(&ap_tasklet); |
806 | } | |
807 | /* Poll on the device until all requests are finished. */ | |
808 | do { | |
809 | flags = 0; | |
95f1556c | 810 | spin_lock_bh(&ap_dev->lock); |
772f5472 | 811 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 812 | spin_unlock_bh(&ap_dev->lock); |
772f5472 FB |
813 | } while ((flags & 1) || (flags & 2)); |
814 | ||
5314af69 FB |
815 | spin_lock_bh(&ap_dev->lock); |
816 | ap_dev->unregistered = 1; | |
817 | spin_unlock_bh(&ap_dev->lock); | |
818 | ||
772f5472 FB |
819 | return 0; |
820 | } | |
821 | ||
822 | static int ap_bus_resume(struct device *dev) | |
823 | { | |
824 | int rc = 0; | |
825 | struct ap_device *ap_dev = to_ap_dev(dev); | |
826 | ||
827 | if (ap_suspend_flag) { | |
828 | ap_suspend_flag = 0; | |
829 | if (!ap_interrupts_available()) | |
830 | ap_interrupt_indicator = NULL; | |
75014550 | 831 | ap_query_configuration(); |
5314af69 FB |
832 | if (!user_set_domain) { |
833 | ap_domain_index = -1; | |
834 | ap_select_domain(); | |
835 | } | |
772f5472 FB |
836 | init_timer(&ap_config_timer); |
837 | ap_config_timer.function = ap_config_timeout; | |
838 | ap_config_timer.data = 0; | |
839 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
840 | add_timer(&ap_config_timer); | |
841 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
842 | if (!ap_work_queue) | |
843 | return -ENOMEM; | |
844 | tasklet_enable(&ap_tasklet); | |
845 | if (!ap_using_interrupts()) | |
846 | ap_schedule_poll_timer(); | |
847 | else | |
848 | tasklet_schedule(&ap_tasklet); | |
849 | if (ap_thread_flag) | |
850 | rc = ap_poll_thread_start(); | |
772f5472 | 851 | } |
5314af69 FB |
852 | if (AP_QID_QUEUE(ap_dev->qid) != ap_domain_index) { |
853 | spin_lock_bh(&ap_dev->lock); | |
854 | ap_dev->qid = AP_MKQID(AP_QID_DEVICE(ap_dev->qid), | |
855 | ap_domain_index); | |
856 | spin_unlock_bh(&ap_dev->lock); | |
857 | } | |
858 | queue_work(ap_work_queue, &ap_config_work); | |
772f5472 FB |
859 | |
860 | return rc; | |
861 | } | |
862 | ||
1534c382 MS |
863 | static struct bus_type ap_bus_type = { |
864 | .name = "ap", | |
865 | .match = &ap_bus_match, | |
866 | .uevent = &ap_uevent, | |
772f5472 FB |
867 | .suspend = ap_bus_suspend, |
868 | .resume = ap_bus_resume | |
1534c382 MS |
869 | }; |
870 | ||
871 | static int ap_device_probe(struct device *dev) | |
872 | { | |
873 | struct ap_device *ap_dev = to_ap_dev(dev); | |
874 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); | |
875 | int rc; | |
876 | ||
877 | ap_dev->drv = ap_drv; | |
878 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; | |
faa582ca | 879 | if (!rc) { |
43c207e6 | 880 | spin_lock_bh(&ap_device_list_lock); |
faa582ca | 881 | list_add(&ap_dev->list, &ap_device_list); |
43c207e6 | 882 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca | 883 | } |
1534c382 MS |
884 | return rc; |
885 | } | |
886 | ||
887 | /** | |
1749a81d FB |
888 | * __ap_flush_queue(): Flush requests. |
889 | * @ap_dev: Pointer to the AP device | |
890 | * | |
1534c382 | 891 | * Flush all requests from the request/pending queue of an AP device. |
1534c382 | 892 | */ |
4d284cac | 893 | static void __ap_flush_queue(struct ap_device *ap_dev) |
1534c382 MS |
894 | { |
895 | struct ap_message *ap_msg, *next; | |
896 | ||
897 | list_for_each_entry_safe(ap_msg, next, &ap_dev->pendingq, list) { | |
898 | list_del_init(&ap_msg->list); | |
899 | ap_dev->pendingq_count--; | |
54a8f561 | 900 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
901 | } |
902 | list_for_each_entry_safe(ap_msg, next, &ap_dev->requestq, list) { | |
903 | list_del_init(&ap_msg->list); | |
904 | ap_dev->requestq_count--; | |
54a8f561 | 905 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
906 | } |
907 | } | |
908 | ||
909 | void ap_flush_queue(struct ap_device *ap_dev) | |
910 | { | |
911 | spin_lock_bh(&ap_dev->lock); | |
912 | __ap_flush_queue(ap_dev); | |
913 | spin_unlock_bh(&ap_dev->lock); | |
914 | } | |
915 | EXPORT_SYMBOL(ap_flush_queue); | |
916 | ||
917 | static int ap_device_remove(struct device *dev) | |
918 | { | |
919 | struct ap_device *ap_dev = to_ap_dev(dev); | |
920 | struct ap_driver *ap_drv = ap_dev->drv; | |
921 | ||
4e56296d | 922 | ap_flush_queue(ap_dev); |
af512ed0 | 923 | del_timer_sync(&ap_dev->timeout); |
43c207e6 | 924 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 925 | list_del_init(&ap_dev->list); |
43c207e6 | 926 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca RW |
927 | if (ap_drv->remove) |
928 | ap_drv->remove(ap_dev); | |
e675c0d2 RW |
929 | spin_lock_bh(&ap_dev->lock); |
930 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
931 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
932 | return 0; |
933 | } | |
934 | ||
935 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, | |
936 | char *name) | |
937 | { | |
938 | struct device_driver *drv = &ap_drv->driver; | |
939 | ||
940 | drv->bus = &ap_bus_type; | |
941 | drv->probe = ap_device_probe; | |
942 | drv->remove = ap_device_remove; | |
943 | drv->owner = owner; | |
944 | drv->name = name; | |
945 | return driver_register(drv); | |
946 | } | |
947 | EXPORT_SYMBOL(ap_driver_register); | |
948 | ||
949 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
950 | { | |
951 | driver_unregister(&ap_drv->driver); | |
952 | } | |
953 | EXPORT_SYMBOL(ap_driver_unregister); | |
954 | ||
dabecb29 HD |
955 | void ap_bus_force_rescan(void) |
956 | { | |
957 | /* Delete the AP bus rescan timer. */ | |
958 | del_timer(&ap_config_timer); | |
959 | ||
960 | /* processing a synchonuous bus rescan */ | |
961 | ap_scan_bus(NULL); | |
962 | ||
963 | /* Setup the AP bus rescan timer again. */ | |
964 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
965 | add_timer(&ap_config_timer); | |
966 | } | |
967 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
968 | ||
1749a81d | 969 | /* |
1534c382 MS |
970 | * AP bus attributes. |
971 | */ | |
972 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) | |
973 | { | |
974 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); | |
975 | } | |
976 | ||
977 | static BUS_ATTR(ap_domain, 0444, ap_domain_show, NULL); | |
978 | ||
979 | static ssize_t ap_config_time_show(struct bus_type *bus, char *buf) | |
980 | { | |
981 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); | |
982 | } | |
983 | ||
cb17a636 FB |
984 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
985 | { | |
986 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
987 | ap_using_interrupts() ? 1 : 0); | |
988 | } | |
989 | ||
990 | static BUS_ATTR(ap_interrupts, 0444, ap_interrupts_show, NULL); | |
991 | ||
1534c382 MS |
992 | static ssize_t ap_config_time_store(struct bus_type *bus, |
993 | const char *buf, size_t count) | |
994 | { | |
995 | int time; | |
996 | ||
997 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
998 | return -EINVAL; | |
999 | ap_config_time = time; | |
1000 | if (!timer_pending(&ap_config_timer) || | |
1001 | !mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ)) { | |
1002 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1003 | add_timer(&ap_config_timer); | |
1004 | } | |
1005 | return count; | |
1006 | } | |
1007 | ||
1008 | static BUS_ATTR(config_time, 0644, ap_config_time_show, ap_config_time_store); | |
1009 | ||
1010 | static ssize_t ap_poll_thread_show(struct bus_type *bus, char *buf) | |
1011 | { | |
1012 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); | |
1013 | } | |
1014 | ||
1015 | static ssize_t ap_poll_thread_store(struct bus_type *bus, | |
1016 | const char *buf, size_t count) | |
1017 | { | |
1018 | int flag, rc; | |
1019 | ||
1020 | if (sscanf(buf, "%d\n", &flag) != 1) | |
1021 | return -EINVAL; | |
1022 | if (flag) { | |
1023 | rc = ap_poll_thread_start(); | |
1024 | if (rc) | |
1025 | return rc; | |
1026 | } | |
1027 | else | |
1028 | ap_poll_thread_stop(); | |
1029 | return count; | |
1030 | } | |
1031 | ||
1032 | static BUS_ATTR(poll_thread, 0644, ap_poll_thread_show, ap_poll_thread_store); | |
1033 | ||
fe137230 FB |
1034 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
1035 | { | |
1036 | return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); | |
1037 | } | |
1038 | ||
1039 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
1040 | size_t count) | |
1041 | { | |
1042 | unsigned long long time; | |
1043 | ktime_t hr_time; | |
1044 | ||
1045 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
1046 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
1047 | time > 120000000000ULL) | |
fe137230 FB |
1048 | return -EINVAL; |
1049 | poll_timeout = time; | |
1050 | hr_time = ktime_set(0, poll_timeout); | |
1051 | ||
1052 | if (!hrtimer_is_queued(&ap_poll_timer) || | |
6c644eae AV |
1053 | !hrtimer_forward(&ap_poll_timer, hrtimer_get_expires(&ap_poll_timer), hr_time)) { |
1054 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1055 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
fe137230 FB |
1056 | } |
1057 | return count; | |
1058 | } | |
1059 | ||
1060 | static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store); | |
1061 | ||
1534c382 MS |
1062 | static struct bus_attribute *const ap_bus_attrs[] = { |
1063 | &bus_attr_ap_domain, | |
1064 | &bus_attr_config_time, | |
1065 | &bus_attr_poll_thread, | |
cb17a636 | 1066 | &bus_attr_ap_interrupts, |
fe137230 FB |
1067 | &bus_attr_poll_timeout, |
1068 | NULL, | |
1534c382 MS |
1069 | }; |
1070 | ||
75014550 HD |
1071 | static inline int ap_test_config(unsigned int *field, unsigned int nr) |
1072 | { | |
1073 | if (nr > 0xFFu) | |
1074 | return 0; | |
1075 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
1080 | * @id AP card ID | |
1081 | * | |
1082 | * Returns 0 if the card is not configured | |
1083 | * 1 if the card is configured or | |
1084 | * if the configuration information is not available | |
1085 | */ | |
1086 | static inline int ap_test_config_card_id(unsigned int id) | |
1087 | { | |
1088 | if (!ap_configuration) | |
1089 | return 1; | |
1090 | return ap_test_config(ap_configuration->apm, id); | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | * ap_test_config_domain(): Test, whether an AP usage domain is configured. | |
1095 | * @domain AP usage domain ID | |
1096 | * | |
1097 | * Returns 0 if the usage domain is not configured | |
1098 | * 1 if the usage domain is configured or | |
1099 | * if the configuration information is not available | |
1100 | */ | |
1101 | static inline int ap_test_config_domain(unsigned int domain) | |
1102 | { | |
1103 | if (!ap_configuration) | |
1104 | return 1; | |
1105 | return ap_test_config(ap_configuration->aqm, domain); | |
1106 | } | |
1107 | ||
1108 | /** | |
1109 | * ap_query_configuration(): Query AP configuration information. | |
1110 | * | |
1111 | * Query information of installed cards and configured domains from AP. | |
1112 | */ | |
1113 | static void ap_query_configuration(void) | |
1114 | { | |
1115 | #ifdef CONFIG_64BIT | |
1116 | if (ap_configuration_available()) { | |
1117 | if (!ap_configuration) | |
1118 | ap_configuration = | |
1119 | kzalloc(sizeof(struct ap_config_info), | |
1120 | GFP_KERNEL); | |
1121 | if (ap_configuration) | |
1122 | __ap_query_configuration(ap_configuration); | |
1123 | } else | |
1124 | ap_configuration = NULL; | |
1125 | #else | |
1126 | ap_configuration = NULL; | |
1127 | #endif | |
1128 | } | |
1129 | ||
1534c382 | 1130 | /** |
1749a81d FB |
1131 | * ap_select_domain(): Select an AP domain. |
1132 | * | |
1133 | * Pick one of the 16 AP domains. | |
1534c382 | 1134 | */ |
4d284cac | 1135 | static int ap_select_domain(void) |
1534c382 MS |
1136 | { |
1137 | int queue_depth, device_type, count, max_count, best_domain; | |
75014550 | 1138 | ap_qid_t qid; |
1534c382 MS |
1139 | int rc, i, j; |
1140 | ||
1749a81d | 1141 | /* |
1534c382 MS |
1142 | * We want to use a single domain. Either the one specified with |
1143 | * the "domain=" parameter or the domain with the maximum number | |
1144 | * of devices. | |
1145 | */ | |
1146 | if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS) | |
1147 | /* Domain has already been selected. */ | |
1148 | return 0; | |
1149 | best_domain = -1; | |
1150 | max_count = 0; | |
1151 | for (i = 0; i < AP_DOMAINS; i++) { | |
75014550 HD |
1152 | if (!ap_test_config_domain(i)) |
1153 | continue; | |
1534c382 MS |
1154 | count = 0; |
1155 | for (j = 0; j < AP_DEVICES; j++) { | |
75014550 HD |
1156 | if (!ap_test_config_card_id(j)) |
1157 | continue; | |
1158 | qid = AP_MKQID(j, i); | |
1534c382 MS |
1159 | rc = ap_query_queue(qid, &queue_depth, &device_type); |
1160 | if (rc) | |
1161 | continue; | |
1162 | count++; | |
1163 | } | |
1164 | if (count > max_count) { | |
1165 | max_count = count; | |
1166 | best_domain = i; | |
1167 | } | |
1168 | } | |
1169 | if (best_domain >= 0){ | |
1170 | ap_domain_index = best_domain; | |
1171 | return 0; | |
1172 | } | |
1173 | return -ENODEV; | |
1174 | } | |
1175 | ||
1176 | /** | |
1749a81d | 1177 | * ap_probe_device_type(): Find the device type of an AP. |
1534c382 | 1178 | * @ap_dev: pointer to the AP device. |
1749a81d FB |
1179 | * |
1180 | * Find the device type if query queue returned a device type of 0. | |
1534c382 MS |
1181 | */ |
1182 | static int ap_probe_device_type(struct ap_device *ap_dev) | |
1183 | { | |
1184 | static unsigned char msg[] = { | |
1185 | 0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00, | |
1186 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1187 | 0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00, | |
1188 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1189 | 0x01,0x00,0x43,0x43,0x41,0x2d,0x41,0x50, | |
1190 | 0x50,0x4c,0x20,0x20,0x20,0x01,0x01,0x01, | |
1191 | 0x00,0x00,0x00,0x00,0x50,0x4b,0x00,0x00, | |
1192 | 0x00,0x00,0x01,0x1c,0x00,0x00,0x00,0x00, | |
1193 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1194 | 0x00,0x00,0x05,0xb8,0x00,0x00,0x00,0x00, | |
1195 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1196 | 0x70,0x00,0x41,0x00,0x00,0x00,0x00,0x00, | |
1197 | 0x00,0x00,0x54,0x32,0x01,0x00,0xa0,0x00, | |
1198 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1199 | 0x00,0x00,0x00,0x00,0xb8,0x05,0x00,0x00, | |
1200 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1201 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1202 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1203 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1204 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1205 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1206 | 0x00,0x00,0x0a,0x00,0x00,0x00,0x00,0x00, | |
1207 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1208 | 0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00, | |
1209 | 0x49,0x43,0x53,0x46,0x20,0x20,0x20,0x20, | |
1210 | 0x50,0x4b,0x0a,0x00,0x50,0x4b,0x43,0x53, | |
1211 | 0x2d,0x31,0x2e,0x32,0x37,0x00,0x11,0x22, | |
1212 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1213 | 0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88, | |
1214 | 0x99,0x00,0x11,0x22,0x33,0x44,0x55,0x66, | |
1215 | 0x77,0x88,0x99,0x00,0x11,0x22,0x33,0x44, | |
1216 | 0x55,0x66,0x77,0x88,0x99,0x00,0x11,0x22, | |
1217 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1218 | 0x11,0x22,0x33,0x5d,0x00,0x5b,0x00,0x77, | |
1219 | 0x88,0x1e,0x00,0x00,0x57,0x00,0x00,0x00, | |
1220 | 0x00,0x04,0x00,0x00,0x4f,0x00,0x00,0x00, | |
1221 | 0x03,0x02,0x00,0x00,0x40,0x01,0x00,0x01, | |
1222 | 0xce,0x02,0x68,0x2d,0x5f,0xa9,0xde,0x0c, | |
1223 | 0xf6,0xd2,0x7b,0x58,0x4b,0xf9,0x28,0x68, | |
1224 | 0x3d,0xb4,0xf4,0xef,0x78,0xd5,0xbe,0x66, | |
1225 | 0x63,0x42,0xef,0xf8,0xfd,0xa4,0xf8,0xb0, | |
1226 | 0x8e,0x29,0xc2,0xc9,0x2e,0xd8,0x45,0xb8, | |
1227 | 0x53,0x8c,0x6f,0x4e,0x72,0x8f,0x6c,0x04, | |
1228 | 0x9c,0x88,0xfc,0x1e,0xc5,0x83,0x55,0x57, | |
1229 | 0xf7,0xdd,0xfd,0x4f,0x11,0x36,0x95,0x5d, | |
1230 | }; | |
1231 | struct ap_queue_status status; | |
1232 | unsigned long long psmid; | |
1233 | char *reply; | |
1234 | int rc, i; | |
1235 | ||
1236 | reply = (void *) get_zeroed_page(GFP_KERNEL); | |
1237 | if (!reply) { | |
1238 | rc = -ENOMEM; | |
1239 | goto out; | |
1240 | } | |
1241 | ||
1242 | status = __ap_send(ap_dev->qid, 0x0102030405060708ULL, | |
a6a5d73a | 1243 | msg, sizeof(msg), 0); |
1534c382 MS |
1244 | if (status.response_code != AP_RESPONSE_NORMAL) { |
1245 | rc = -ENODEV; | |
1246 | goto out_free; | |
1247 | } | |
1248 | ||
1249 | /* Wait for the test message to complete. */ | |
1250 | for (i = 0; i < 6; i++) { | |
1251 | mdelay(300); | |
1252 | status = __ap_recv(ap_dev->qid, &psmid, reply, 4096); | |
1253 | if (status.response_code == AP_RESPONSE_NORMAL && | |
1254 | psmid == 0x0102030405060708ULL) | |
1255 | break; | |
1256 | } | |
1257 | if (i < 6) { | |
1258 | /* Got an answer. */ | |
1259 | if (reply[0] == 0x00 && reply[1] == 0x86) | |
1260 | ap_dev->device_type = AP_DEVICE_TYPE_PCICC; | |
1261 | else | |
1262 | ap_dev->device_type = AP_DEVICE_TYPE_PCICA; | |
1263 | rc = 0; | |
1264 | } else | |
1265 | rc = -ENODEV; | |
1266 | ||
1267 | out_free: | |
1268 | free_page((unsigned long) reply); | |
1269 | out: | |
1270 | return rc; | |
1271 | } | |
1272 | ||
cb17a636 FB |
1273 | static void ap_interrupt_handler(void *unused1, void *unused2) |
1274 | { | |
420f42ec | 1275 | inc_irq_stat(IRQIO_APB); |
cb17a636 FB |
1276 | tasklet_schedule(&ap_tasklet); |
1277 | } | |
1278 | ||
1534c382 | 1279 | /** |
1749a81d FB |
1280 | * __ap_scan_bus(): Scan the AP bus. |
1281 | * @dev: Pointer to device | |
1282 | * @data: Pointer to data | |
1283 | * | |
1284 | * Scan the AP bus for new devices. | |
1534c382 MS |
1285 | */ |
1286 | static int __ap_scan_bus(struct device *dev, void *data) | |
1287 | { | |
1288 | return to_ap_dev(dev)->qid == (ap_qid_t)(unsigned long) data; | |
1289 | } | |
1290 | ||
1291 | static void ap_device_release(struct device *dev) | |
1292 | { | |
1293 | struct ap_device *ap_dev = to_ap_dev(dev); | |
1294 | ||
1295 | kfree(ap_dev); | |
1296 | } | |
1297 | ||
4927b3f7 | 1298 | static void ap_scan_bus(struct work_struct *unused) |
1534c382 MS |
1299 | { |
1300 | struct ap_device *ap_dev; | |
1301 | struct device *dev; | |
1302 | ap_qid_t qid; | |
1303 | int queue_depth, device_type; | |
6bed05bc | 1304 | unsigned int device_functions; |
1534c382 MS |
1305 | int rc, i; |
1306 | ||
75014550 | 1307 | ap_query_configuration(); |
1534c382 MS |
1308 | if (ap_select_domain() != 0) |
1309 | return; | |
1310 | for (i = 0; i < AP_DEVICES; i++) { | |
1311 | qid = AP_MKQID(i, ap_domain_index); | |
1312 | dev = bus_find_device(&ap_bus_type, NULL, | |
1313 | (void *)(unsigned long)qid, | |
1314 | __ap_scan_bus); | |
75014550 HD |
1315 | if (ap_test_config_card_id(i)) |
1316 | rc = ap_query_queue(qid, &queue_depth, &device_type); | |
1317 | else | |
1318 | rc = -ENODEV; | |
c6a48264 | 1319 | if (dev) { |
af512ed0 RW |
1320 | if (rc == -EBUSY) { |
1321 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1322 | schedule_timeout(AP_RESET_TIMEOUT); | |
1323 | rc = ap_query_queue(qid, &queue_depth, | |
1324 | &device_type); | |
1325 | } | |
c6a48264 RW |
1326 | ap_dev = to_ap_dev(dev); |
1327 | spin_lock_bh(&ap_dev->lock); | |
1328 | if (rc || ap_dev->unregistered) { | |
1329 | spin_unlock_bh(&ap_dev->lock); | |
5314af69 FB |
1330 | if (ap_dev->unregistered) |
1331 | i--; | |
c6a48264 | 1332 | device_unregister(dev); |
af512ed0 | 1333 | put_device(dev); |
c6a48264 | 1334 | continue; |
af512ed0 RW |
1335 | } |
1336 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
1337 | put_device(dev); |
1338 | continue; | |
1339 | } | |
1534c382 MS |
1340 | if (rc) |
1341 | continue; | |
1342 | rc = ap_init_queue(qid); | |
1343 | if (rc) | |
1344 | continue; | |
1345 | ap_dev = kzalloc(sizeof(*ap_dev), GFP_KERNEL); | |
1346 | if (!ap_dev) | |
1347 | break; | |
1348 | ap_dev->qid = qid; | |
1349 | ap_dev->queue_depth = queue_depth; | |
4e56296d | 1350 | ap_dev->unregistered = 1; |
1534c382 MS |
1351 | spin_lock_init(&ap_dev->lock); |
1352 | INIT_LIST_HEAD(&ap_dev->pendingq); | |
1353 | INIT_LIST_HEAD(&ap_dev->requestq); | |
cf352ce0 | 1354 | INIT_LIST_HEAD(&ap_dev->list); |
af512ed0 RW |
1355 | setup_timer(&ap_dev->timeout, ap_request_timeout, |
1356 | (unsigned long) ap_dev); | |
6bed05bc HD |
1357 | switch (device_type) { |
1358 | case 0: | |
1e2076f4 | 1359 | /* device type probing for old cards */ |
cf2d007b HD |
1360 | if (ap_probe_device_type(ap_dev)) { |
1361 | kfree(ap_dev); | |
1362 | continue; | |
1363 | } | |
6bed05bc | 1364 | break; |
6bed05bc | 1365 | default: |
1534c382 | 1366 | ap_dev->device_type = device_type; |
6bed05bc | 1367 | } |
1534c382 | 1368 | |
1e2076f4 HD |
1369 | rc = ap_query_functions(qid, &device_functions); |
1370 | if (!rc) | |
1371 | ap_dev->functions = device_functions; | |
1372 | else | |
1373 | ap_dev->functions = 0u; | |
1374 | ||
1534c382 MS |
1375 | ap_dev->device.bus = &ap_bus_type; |
1376 | ap_dev->device.parent = ap_root_device; | |
edc44fa0 FB |
1377 | if (dev_set_name(&ap_dev->device, "card%02x", |
1378 | AP_QID_DEVICE(ap_dev->qid))) { | |
1379 | kfree(ap_dev); | |
1380 | continue; | |
1381 | } | |
1534c382 MS |
1382 | ap_dev->device.release = ap_device_release; |
1383 | rc = device_register(&ap_dev->device); | |
1384 | if (rc) { | |
c6304933 | 1385 | put_device(&ap_dev->device); |
1534c382 MS |
1386 | continue; |
1387 | } | |
1388 | /* Add device attributes. */ | |
1389 | rc = sysfs_create_group(&ap_dev->device.kobj, | |
1390 | &ap_dev_attr_group); | |
4e56296d RW |
1391 | if (!rc) { |
1392 | spin_lock_bh(&ap_dev->lock); | |
1393 | ap_dev->unregistered = 0; | |
1394 | spin_unlock_bh(&ap_dev->lock); | |
1395 | } | |
1396 | else | |
1534c382 MS |
1397 | device_unregister(&ap_dev->device); |
1398 | } | |
1399 | } | |
1400 | ||
1401 | static void | |
1402 | ap_config_timeout(unsigned long ptr) | |
1403 | { | |
1404 | queue_work(ap_work_queue, &ap_config_work); | |
1405 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1406 | add_timer(&ap_config_timer); | |
1407 | } | |
1408 | ||
1409 | /** | |
bc615dea | 1410 | * __ap_schedule_poll_timer(): Schedule poll timer. |
1749a81d | 1411 | * |
1534c382 MS |
1412 | * Set up the timer to run the poll tasklet |
1413 | */ | |
bc615dea | 1414 | static inline void __ap_schedule_poll_timer(void) |
1534c382 | 1415 | { |
8d406c6d | 1416 | ktime_t hr_time; |
93521314 FB |
1417 | |
1418 | spin_lock_bh(&ap_poll_timer_lock); | |
bc615dea | 1419 | if (hrtimer_is_queued(&ap_poll_timer) || ap_suspend_flag) |
93521314 | 1420 | goto out; |
8d406c6d FB |
1421 | if (ktime_to_ns(hrtimer_expires_remaining(&ap_poll_timer)) <= 0) { |
1422 | hr_time = ktime_set(0, poll_timeout); | |
1423 | hrtimer_forward_now(&ap_poll_timer, hr_time); | |
1424 | hrtimer_restart(&ap_poll_timer); | |
1425 | } | |
93521314 FB |
1426 | out: |
1427 | spin_unlock_bh(&ap_poll_timer_lock); | |
1534c382 MS |
1428 | } |
1429 | ||
bc615dea HD |
1430 | /** |
1431 | * ap_schedule_poll_timer(): Schedule poll timer. | |
1432 | * | |
1433 | * Set up the timer to run the poll tasklet | |
1434 | */ | |
1435 | static inline void ap_schedule_poll_timer(void) | |
1436 | { | |
1437 | if (ap_using_interrupts()) | |
1438 | return; | |
1439 | __ap_schedule_poll_timer(); | |
1440 | } | |
1441 | ||
1534c382 | 1442 | /** |
1749a81d | 1443 | * ap_poll_read(): Receive pending reply messages from an AP device. |
1534c382 MS |
1444 | * @ap_dev: pointer to the AP device |
1445 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1446 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1447 | * |
1534c382 MS |
1448 | * Returns 0 if the device is still present, -ENODEV if not. |
1449 | */ | |
4d284cac | 1450 | static int ap_poll_read(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1451 | { |
1452 | struct ap_queue_status status; | |
1453 | struct ap_message *ap_msg; | |
1454 | ||
1455 | if (ap_dev->queue_count <= 0) | |
1456 | return 0; | |
1457 | status = __ap_recv(ap_dev->qid, &ap_dev->reply->psmid, | |
1458 | ap_dev->reply->message, ap_dev->reply->length); | |
1459 | switch (status.response_code) { | |
1460 | case AP_RESPONSE_NORMAL: | |
1461 | atomic_dec(&ap_poll_requests); | |
af512ed0 | 1462 | ap_decrease_queue_count(ap_dev); |
1534c382 MS |
1463 | list_for_each_entry(ap_msg, &ap_dev->pendingq, list) { |
1464 | if (ap_msg->psmid != ap_dev->reply->psmid) | |
1465 | continue; | |
1466 | list_del_init(&ap_msg->list); | |
1467 | ap_dev->pendingq_count--; | |
54a8f561 | 1468 | ap_msg->receive(ap_dev, ap_msg, ap_dev->reply); |
1534c382 MS |
1469 | break; |
1470 | } | |
1471 | if (ap_dev->queue_count > 0) | |
1472 | *flags |= 1; | |
1473 | break; | |
1474 | case AP_RESPONSE_NO_PENDING_REPLY: | |
1475 | if (status.queue_empty) { | |
1476 | /* The card shouldn't forget requests but who knows. */ | |
e675c0d2 | 1477 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); |
1534c382 MS |
1478 | ap_dev->queue_count = 0; |
1479 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1480 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1481 | ap_dev->pendingq_count = 0; | |
1482 | } else | |
1483 | *flags |= 2; | |
1484 | break; | |
1485 | default: | |
1486 | return -ENODEV; | |
1487 | } | |
1488 | return 0; | |
1489 | } | |
1490 | ||
1491 | /** | |
1749a81d | 1492 | * ap_poll_write(): Send messages from the request queue to an AP device. |
1534c382 MS |
1493 | * @ap_dev: pointer to the AP device |
1494 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1495 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1496 | * |
1534c382 MS |
1497 | * Returns 0 if the device is still present, -ENODEV if not. |
1498 | */ | |
4d284cac | 1499 | static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1500 | { |
1501 | struct ap_queue_status status; | |
1502 | struct ap_message *ap_msg; | |
1503 | ||
1504 | if (ap_dev->requestq_count <= 0 || | |
1505 | ap_dev->queue_count >= ap_dev->queue_depth) | |
1506 | return 0; | |
1507 | /* Start the next request on the queue. */ | |
1508 | ap_msg = list_entry(ap_dev->requestq.next, struct ap_message, list); | |
1509 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a | 1510 | ap_msg->message, ap_msg->length, ap_msg->special); |
1534c382 MS |
1511 | switch (status.response_code) { |
1512 | case AP_RESPONSE_NORMAL: | |
1513 | atomic_inc(&ap_poll_requests); | |
af512ed0 | 1514 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1515 | list_move_tail(&ap_msg->list, &ap_dev->pendingq); |
1516 | ap_dev->requestq_count--; | |
1517 | ap_dev->pendingq_count++; | |
1518 | if (ap_dev->queue_count < ap_dev->queue_depth && | |
1519 | ap_dev->requestq_count > 0) | |
1520 | *flags |= 1; | |
1521 | *flags |= 2; | |
1522 | break; | |
af512ed0 | 1523 | case AP_RESPONSE_RESET_IN_PROGRESS: |
bc615dea HD |
1524 | __ap_schedule_poll_timer(); |
1525 | case AP_RESPONSE_Q_FULL: | |
1534c382 MS |
1526 | *flags |= 2; |
1527 | break; | |
1528 | case AP_RESPONSE_MESSAGE_TOO_BIG: | |
a6a5d73a | 1529 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 MS |
1530 | return -EINVAL; |
1531 | default: | |
1532 | return -ENODEV; | |
1533 | } | |
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | /** | |
1749a81d | 1538 | * ap_poll_queue(): Poll AP device for pending replies and send new messages. |
1534c382 MS |
1539 | * @ap_dev: pointer to the bus device |
1540 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1541 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d FB |
1542 | * |
1543 | * Poll AP device for pending replies and send new messages. If either | |
1544 | * ap_poll_read or ap_poll_write returns -ENODEV unregister the device. | |
1534c382 MS |
1545 | * Returns 0. |
1546 | */ | |
1547 | static inline int ap_poll_queue(struct ap_device *ap_dev, unsigned long *flags) | |
1548 | { | |
1549 | int rc; | |
1550 | ||
1551 | rc = ap_poll_read(ap_dev, flags); | |
1552 | if (rc) | |
1553 | return rc; | |
1554 | return ap_poll_write(ap_dev, flags); | |
1555 | } | |
1556 | ||
1557 | /** | |
1749a81d | 1558 | * __ap_queue_message(): Queue a message to a device. |
1534c382 MS |
1559 | * @ap_dev: pointer to the AP device |
1560 | * @ap_msg: the message to be queued | |
1749a81d FB |
1561 | * |
1562 | * Queue a message to a device. Returns 0 if successful. | |
1534c382 MS |
1563 | */ |
1564 | static int __ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1565 | { | |
1566 | struct ap_queue_status status; | |
1567 | ||
1568 | if (list_empty(&ap_dev->requestq) && | |
1569 | ap_dev->queue_count < ap_dev->queue_depth) { | |
1570 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a FB |
1571 | ap_msg->message, ap_msg->length, |
1572 | ap_msg->special); | |
1534c382 MS |
1573 | switch (status.response_code) { |
1574 | case AP_RESPONSE_NORMAL: | |
1575 | list_add_tail(&ap_msg->list, &ap_dev->pendingq); | |
1576 | atomic_inc(&ap_poll_requests); | |
1577 | ap_dev->pendingq_count++; | |
af512ed0 | 1578 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1579 | ap_dev->total_request_count++; |
1580 | break; | |
1581 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 1582 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 MS |
1583 | list_add_tail(&ap_msg->list, &ap_dev->requestq); |
1584 | ap_dev->requestq_count++; | |
1585 | ap_dev->total_request_count++; | |
1586 | return -EBUSY; | |
a6a5d73a | 1587 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 | 1588 | case AP_RESPONSE_MESSAGE_TOO_BIG: |
54a8f561 | 1589 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-EINVAL)); |
1534c382 MS |
1590 | return -EINVAL; |
1591 | default: /* Device is gone. */ | |
54a8f561 | 1592 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
1593 | return -ENODEV; |
1594 | } | |
1595 | } else { | |
1596 | list_add_tail(&ap_msg->list, &ap_dev->requestq); | |
1597 | ap_dev->requestq_count++; | |
1598 | ap_dev->total_request_count++; | |
1599 | return -EBUSY; | |
1600 | } | |
1601 | ap_schedule_poll_timer(); | |
1602 | return 0; | |
1603 | } | |
1604 | ||
1605 | void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1606 | { | |
1607 | unsigned long flags; | |
1608 | int rc; | |
1609 | ||
54a8f561 HD |
1610 | /* For asynchronous message handling a valid receive-callback |
1611 | * is required. */ | |
1612 | BUG_ON(!ap_msg->receive); | |
1613 | ||
1534c382 MS |
1614 | spin_lock_bh(&ap_dev->lock); |
1615 | if (!ap_dev->unregistered) { | |
1616 | /* Make room on the queue by polling for finished requests. */ | |
1617 | rc = ap_poll_queue(ap_dev, &flags); | |
1618 | if (!rc) | |
1619 | rc = __ap_queue_message(ap_dev, ap_msg); | |
1620 | if (!rc) | |
1621 | wake_up(&ap_poll_wait); | |
4e56296d RW |
1622 | if (rc == -ENODEV) |
1623 | ap_dev->unregistered = 1; | |
1534c382 | 1624 | } else { |
54a8f561 | 1625 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
c6a48264 | 1626 | rc = -ENODEV; |
1534c382 MS |
1627 | } |
1628 | spin_unlock_bh(&ap_dev->lock); | |
1629 | if (rc == -ENODEV) | |
1630 | device_unregister(&ap_dev->device); | |
1631 | } | |
1632 | EXPORT_SYMBOL(ap_queue_message); | |
1633 | ||
1634 | /** | |
1749a81d FB |
1635 | * ap_cancel_message(): Cancel a crypto request. |
1636 | * @ap_dev: The AP device that has the message queued | |
1637 | * @ap_msg: The message that is to be removed | |
1638 | * | |
1534c382 | 1639 | * Cancel a crypto request. This is done by removing the request |
1749a81d | 1640 | * from the device pending or request queue. Note that the |
1534c382 MS |
1641 | * request stays on the AP queue. When it finishes the message |
1642 | * reply will be discarded because the psmid can't be found. | |
1534c382 MS |
1643 | */ |
1644 | void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1645 | { | |
1646 | struct ap_message *tmp; | |
1647 | ||
1648 | spin_lock_bh(&ap_dev->lock); | |
1649 | if (!list_empty(&ap_msg->list)) { | |
1650 | list_for_each_entry(tmp, &ap_dev->pendingq, list) | |
1651 | if (tmp->psmid == ap_msg->psmid) { | |
1652 | ap_dev->pendingq_count--; | |
1653 | goto found; | |
1654 | } | |
1655 | ap_dev->requestq_count--; | |
1656 | found: | |
1657 | list_del_init(&ap_msg->list); | |
1658 | } | |
1659 | spin_unlock_bh(&ap_dev->lock); | |
1660 | } | |
1661 | EXPORT_SYMBOL(ap_cancel_message); | |
1662 | ||
1663 | /** | |
1749a81d | 1664 | * ap_poll_timeout(): AP receive polling for finished AP requests. |
fe137230 | 1665 | * @unused: Unused pointer. |
1749a81d | 1666 | * |
fe137230 | 1667 | * Schedules the AP tasklet using a high resolution timer. |
1534c382 | 1668 | */ |
fe137230 | 1669 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) |
1534c382 MS |
1670 | { |
1671 | tasklet_schedule(&ap_tasklet); | |
fe137230 | 1672 | return HRTIMER_NORESTART; |
1534c382 MS |
1673 | } |
1674 | ||
af512ed0 | 1675 | /** |
1749a81d FB |
1676 | * ap_reset(): Reset a not responding AP device. |
1677 | * @ap_dev: Pointer to the AP device | |
1678 | * | |
af512ed0 RW |
1679 | * Reset a not responding AP device and move all requests from the |
1680 | * pending queue to the request queue. | |
1681 | */ | |
1682 | static void ap_reset(struct ap_device *ap_dev) | |
1683 | { | |
1684 | int rc; | |
1685 | ||
1686 | ap_dev->reset = AP_RESET_IGNORE; | |
1687 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
1688 | ap_dev->queue_count = 0; | |
1689 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1690 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1691 | ap_dev->pendingq_count = 0; | |
1692 | rc = ap_init_queue(ap_dev->qid); | |
1693 | if (rc == -ENODEV) | |
1694 | ap_dev->unregistered = 1; | |
75464960 HD |
1695 | else |
1696 | __ap_schedule_poll_timer(); | |
af512ed0 RW |
1697 | } |
1698 | ||
43c207e6 | 1699 | static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 | 1700 | { |
1534c382 | 1701 | if (!ap_dev->unregistered) { |
c6a48264 | 1702 | if (ap_poll_queue(ap_dev, flags)) |
4e56296d | 1703 | ap_dev->unregistered = 1; |
af512ed0 RW |
1704 | if (ap_dev->reset == AP_RESET_DO) |
1705 | ap_reset(ap_dev); | |
c6a48264 | 1706 | } |
1534c382 MS |
1707 | return 0; |
1708 | } | |
1709 | ||
1749a81d FB |
1710 | /** |
1711 | * ap_poll_all(): Poll all AP devices. | |
1712 | * @dummy: Unused variable | |
1713 | * | |
1714 | * Poll all AP devices on the bus in a round robin fashion. Continue | |
1715 | * polling until bit 2^0 of the control flags is not set. If bit 2^1 | |
1716 | * of the control flags has been set arm the poll timer. | |
1717 | */ | |
1534c382 MS |
1718 | static void ap_poll_all(unsigned long dummy) |
1719 | { | |
1720 | unsigned long flags; | |
cf352ce0 | 1721 | struct ap_device *ap_dev; |
1534c382 | 1722 | |
cb17a636 FB |
1723 | /* Reset the indicator if interrupts are used. Thus new interrupts can |
1724 | * be received. Doing it in the beginning of the tasklet is therefor | |
1725 | * important that no requests on any AP get lost. | |
1726 | */ | |
1727 | if (ap_using_interrupts()) | |
1728 | xchg((u8 *)ap_interrupt_indicator, 0); | |
1534c382 MS |
1729 | do { |
1730 | flags = 0; | |
43c207e6 | 1731 | spin_lock(&ap_device_list_lock); |
cf352ce0 | 1732 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1733 | spin_lock(&ap_dev->lock); |
43c207e6 | 1734 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1735 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1736 | } |
43c207e6 | 1737 | spin_unlock(&ap_device_list_lock); |
1534c382 MS |
1738 | } while (flags & 1); |
1739 | if (flags & 2) | |
1740 | ap_schedule_poll_timer(); | |
1741 | } | |
1742 | ||
1743 | /** | |
1749a81d FB |
1744 | * ap_poll_thread(): Thread that polls for finished requests. |
1745 | * @data: Unused pointer | |
1746 | * | |
1534c382 MS |
1747 | * AP bus poll thread. The purpose of this thread is to poll for |
1748 | * finished requests in a loop if there is a "free" cpu - that is | |
1749 | * a cpu that doesn't have anything better to do. The polling stops | |
1750 | * as soon as there is another task or if all messages have been | |
1751 | * delivered. | |
1752 | */ | |
1753 | static int ap_poll_thread(void *data) | |
1754 | { | |
1755 | DECLARE_WAITQUEUE(wait, current); | |
1756 | unsigned long flags; | |
1757 | int requests; | |
cf352ce0 | 1758 | struct ap_device *ap_dev; |
1534c382 | 1759 | |
d83682b3 | 1760 | set_user_nice(current, 19); |
1534c382 | 1761 | while (1) { |
772f5472 FB |
1762 | if (ap_suspend_flag) |
1763 | return 0; | |
1534c382 MS |
1764 | if (need_resched()) { |
1765 | schedule(); | |
1766 | continue; | |
1767 | } | |
1768 | add_wait_queue(&ap_poll_wait, &wait); | |
1769 | set_current_state(TASK_INTERRUPTIBLE); | |
1770 | if (kthread_should_stop()) | |
1771 | break; | |
1772 | requests = atomic_read(&ap_poll_requests); | |
1773 | if (requests <= 0) | |
1774 | schedule(); | |
1775 | set_current_state(TASK_RUNNING); | |
1776 | remove_wait_queue(&ap_poll_wait, &wait); | |
1777 | ||
1534c382 | 1778 | flags = 0; |
43c207e6 | 1779 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 1780 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1781 | spin_lock(&ap_dev->lock); |
43c207e6 | 1782 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1783 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1784 | } |
43c207e6 | 1785 | spin_unlock_bh(&ap_device_list_lock); |
1534c382 MS |
1786 | } |
1787 | set_current_state(TASK_RUNNING); | |
1788 | remove_wait_queue(&ap_poll_wait, &wait); | |
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | static int ap_poll_thread_start(void) | |
1793 | { | |
1794 | int rc; | |
1795 | ||
772f5472 | 1796 | if (ap_using_interrupts() || ap_suspend_flag) |
cb17a636 | 1797 | return 0; |
1534c382 MS |
1798 | mutex_lock(&ap_poll_thread_mutex); |
1799 | if (!ap_poll_kthread) { | |
1800 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
1801 | rc = IS_ERR(ap_poll_kthread) ? PTR_ERR(ap_poll_kthread) : 0; | |
1802 | if (rc) | |
1803 | ap_poll_kthread = NULL; | |
1804 | } | |
1805 | else | |
1806 | rc = 0; | |
1807 | mutex_unlock(&ap_poll_thread_mutex); | |
1808 | return rc; | |
1809 | } | |
1810 | ||
1811 | static void ap_poll_thread_stop(void) | |
1812 | { | |
1813 | mutex_lock(&ap_poll_thread_mutex); | |
1814 | if (ap_poll_kthread) { | |
1815 | kthread_stop(ap_poll_kthread); | |
1816 | ap_poll_kthread = NULL; | |
1817 | } | |
1818 | mutex_unlock(&ap_poll_thread_mutex); | |
1819 | } | |
1820 | ||
af512ed0 | 1821 | /** |
1749a81d FB |
1822 | * ap_request_timeout(): Handling of request timeouts |
1823 | * @data: Holds the AP device. | |
1824 | * | |
1825 | * Handles request timeouts. | |
af512ed0 RW |
1826 | */ |
1827 | static void ap_request_timeout(unsigned long data) | |
1828 | { | |
1829 | struct ap_device *ap_dev = (struct ap_device *) data; | |
1830 | ||
cb17a636 | 1831 | if (ap_dev->reset == AP_RESET_ARMED) { |
af512ed0 | 1832 | ap_dev->reset = AP_RESET_DO; |
cb17a636 FB |
1833 | |
1834 | if (ap_using_interrupts()) | |
1835 | tasklet_schedule(&ap_tasklet); | |
1836 | } | |
af512ed0 RW |
1837 | } |
1838 | ||
13e742ba RW |
1839 | static void ap_reset_domain(void) |
1840 | { | |
1841 | int i; | |
1842 | ||
39aa7cf6 RW |
1843 | if (ap_domain_index != -1) |
1844 | for (i = 0; i < AP_DEVICES; i++) | |
1845 | ap_reset_queue(AP_MKQID(i, ap_domain_index)); | |
13e742ba RW |
1846 | } |
1847 | ||
1848 | static void ap_reset_all(void) | |
85eca850 RW |
1849 | { |
1850 | int i, j; | |
1851 | ||
1852 | for (i = 0; i < AP_DOMAINS; i++) | |
1853 | for (j = 0; j < AP_DEVICES; j++) | |
1854 | ap_reset_queue(AP_MKQID(j, i)); | |
1855 | } | |
1856 | ||
1857 | static struct reset_call ap_reset_call = { | |
13e742ba | 1858 | .fn = ap_reset_all, |
85eca850 RW |
1859 | }; |
1860 | ||
1534c382 | 1861 | /** |
1749a81d FB |
1862 | * ap_module_init(): The module initialization code. |
1863 | * | |
1864 | * Initializes the module. | |
1534c382 MS |
1865 | */ |
1866 | int __init ap_module_init(void) | |
1867 | { | |
1868 | int rc, i; | |
1869 | ||
1870 | if (ap_domain_index < -1 || ap_domain_index >= AP_DOMAINS) { | |
136f7a1c MS |
1871 | pr_warning("%d is not a valid cryptographic domain\n", |
1872 | ap_domain_index); | |
1534c382 MS |
1873 | return -EINVAL; |
1874 | } | |
5314af69 FB |
1875 | /* In resume callback we need to know if the user had set the domain. |
1876 | * If so, we can not just reset it. | |
1877 | */ | |
1878 | if (ap_domain_index >= 0) | |
1879 | user_set_domain = 1; | |
1880 | ||
1534c382 | 1881 | if (ap_instructions_available() != 0) { |
136f7a1c MS |
1882 | pr_warning("The hardware system does not support " |
1883 | "AP instructions\n"); | |
1534c382 MS |
1884 | return -ENODEV; |
1885 | } | |
cb17a636 FB |
1886 | if (ap_interrupts_available()) { |
1887 | isc_register(AP_ISC); | |
1888 | ap_interrupt_indicator = s390_register_adapter_interrupt( | |
1889 | &ap_interrupt_handler, NULL, AP_ISC); | |
1890 | if (IS_ERR(ap_interrupt_indicator)) { | |
1891 | ap_interrupt_indicator = NULL; | |
1892 | isc_unregister(AP_ISC); | |
1893 | } | |
1894 | } | |
1895 | ||
85eca850 | 1896 | register_reset_call(&ap_reset_call); |
1534c382 MS |
1897 | |
1898 | /* Create /sys/bus/ap. */ | |
1899 | rc = bus_register(&ap_bus_type); | |
1900 | if (rc) | |
1901 | goto out; | |
1902 | for (i = 0; ap_bus_attrs[i]; i++) { | |
1903 | rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]); | |
1904 | if (rc) | |
1905 | goto out_bus; | |
1906 | } | |
1907 | ||
1908 | /* Create /sys/devices/ap. */ | |
035da16f | 1909 | ap_root_device = root_device_register("ap"); |
1534c382 MS |
1910 | rc = IS_ERR(ap_root_device) ? PTR_ERR(ap_root_device) : 0; |
1911 | if (rc) | |
1912 | goto out_bus; | |
1913 | ||
1914 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
1915 | if (!ap_work_queue) { | |
1916 | rc = -ENOMEM; | |
1917 | goto out_root; | |
1918 | } | |
1919 | ||
75014550 | 1920 | ap_query_configuration(); |
1534c382 MS |
1921 | if (ap_select_domain() == 0) |
1922 | ap_scan_bus(NULL); | |
1923 | ||
1749a81d | 1924 | /* Setup the AP bus rescan timer. */ |
1534c382 MS |
1925 | init_timer(&ap_config_timer); |
1926 | ap_config_timer.function = ap_config_timeout; | |
1927 | ap_config_timer.data = 0; | |
1928 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1929 | add_timer(&ap_config_timer); | |
1930 | ||
fe137230 FB |
1931 | /* Setup the high resultion poll timer. |
1932 | * If we are running under z/VM adjust polling to z/VM polling rate. | |
1933 | */ | |
1934 | if (MACHINE_IS_VM) | |
1935 | poll_timeout = 1500000; | |
93521314 | 1936 | spin_lock_init(&ap_poll_timer_lock); |
fe137230 FB |
1937 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
1938 | ap_poll_timer.function = ap_poll_timeout; | |
1939 | ||
1534c382 MS |
1940 | /* Start the low priority AP bus poll thread. */ |
1941 | if (ap_thread_flag) { | |
1942 | rc = ap_poll_thread_start(); | |
1943 | if (rc) | |
1944 | goto out_work; | |
1945 | } | |
1946 | ||
1947 | return 0; | |
1948 | ||
1949 | out_work: | |
1950 | del_timer_sync(&ap_config_timer); | |
fe137230 | 1951 | hrtimer_cancel(&ap_poll_timer); |
1534c382 MS |
1952 | destroy_workqueue(ap_work_queue); |
1953 | out_root: | |
035da16f | 1954 | root_device_unregister(ap_root_device); |
1534c382 MS |
1955 | out_bus: |
1956 | while (i--) | |
1957 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
1958 | bus_unregister(&ap_bus_type); | |
1959 | out: | |
85eca850 | 1960 | unregister_reset_call(&ap_reset_call); |
cb17a636 FB |
1961 | if (ap_using_interrupts()) { |
1962 | s390_unregister_adapter_interrupt(ap_interrupt_indicator, AP_ISC); | |
1963 | isc_unregister(AP_ISC); | |
1964 | } | |
1534c382 MS |
1965 | return rc; |
1966 | } | |
1967 | ||
1968 | static int __ap_match_all(struct device *dev, void *data) | |
1969 | { | |
1970 | return 1; | |
1971 | } | |
1972 | ||
1973 | /** | |
1749a81d FB |
1974 | * ap_modules_exit(): The module termination code |
1975 | * | |
1976 | * Terminates the module. | |
1534c382 MS |
1977 | */ |
1978 | void ap_module_exit(void) | |
1979 | { | |
1980 | int i; | |
1981 | struct device *dev; | |
1982 | ||
13e742ba | 1983 | ap_reset_domain(); |
1534c382 MS |
1984 | ap_poll_thread_stop(); |
1985 | del_timer_sync(&ap_config_timer); | |
fe137230 | 1986 | hrtimer_cancel(&ap_poll_timer); |
1534c382 | 1987 | destroy_workqueue(ap_work_queue); |
13e742ba | 1988 | tasklet_kill(&ap_tasklet); |
035da16f | 1989 | root_device_unregister(ap_root_device); |
1534c382 MS |
1990 | while ((dev = bus_find_device(&ap_bus_type, NULL, NULL, |
1991 | __ap_match_all))) | |
1992 | { | |
1993 | device_unregister(dev); | |
1994 | put_device(dev); | |
1995 | } | |
1996 | for (i = 0; ap_bus_attrs[i]; i++) | |
1997 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
1998 | bus_unregister(&ap_bus_type); | |
85eca850 | 1999 | unregister_reset_call(&ap_reset_call); |
cb17a636 FB |
2000 | if (ap_using_interrupts()) { |
2001 | s390_unregister_adapter_interrupt(ap_interrupt_indicator, AP_ISC); | |
2002 | isc_unregister(AP_ISC); | |
2003 | } | |
1534c382 MS |
2004 | } |
2005 | ||
1534c382 MS |
2006 | module_init(ap_module_init); |
2007 | module_exit(ap_module_exit); |