Commit | Line | Data |
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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); | |
f4eae94f | 61 | static void ap_interrupt_handler(struct airq_struct *airq); |
772f5472 FB |
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 | 73 | MODULE_LICENSE("GPL"); |
9da3545d | 74 | MODULE_ALIAS("z90crypt"); |
1534c382 | 75 | |
1749a81d | 76 | /* |
1534c382 MS |
77 | * Module parameter |
78 | */ | |
79 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ | |
80 | module_param_named(domain, ap_domain_index, int, 0000); | |
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; |
1534c382 | 85 | module_param_named(poll_thread, ap_thread_flag, int, 0000); |
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; | |
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 | ||
f4eae94f MS |
123 | /* Adapter interrupt definitions */ |
124 | static int ap_airq_flag; | |
125 | ||
126 | static struct airq_struct ap_airq = { | |
127 | .handler = ap_interrupt_handler, | |
128 | .isc = AP_ISC, | |
129 | }; | |
130 | ||
cb17a636 FB |
131 | /** |
132 | * ap_using_interrupts() - Returns non-zero if interrupt support is | |
133 | * available. | |
134 | */ | |
135 | static inline int ap_using_interrupts(void) | |
136 | { | |
f4eae94f | 137 | return ap_airq_flag; |
cb17a636 FB |
138 | } |
139 | ||
1534c382 | 140 | /** |
1749a81d | 141 | * ap_intructions_available() - Test if AP instructions are available. |
1534c382 | 142 | * |
1749a81d | 143 | * Returns 0 if the AP instructions are installed. |
1534c382 MS |
144 | */ |
145 | static inline int ap_instructions_available(void) | |
146 | { | |
147 | register unsigned long reg0 asm ("0") = AP_MKQID(0,0); | |
148 | register unsigned long reg1 asm ("1") = -ENODEV; | |
149 | register unsigned long reg2 asm ("2") = 0UL; | |
150 | ||
151 | asm volatile( | |
152 | " .long 0xb2af0000\n" /* PQAP(TAPQ) */ | |
153 | "0: la %1,0\n" | |
154 | "1:\n" | |
155 | EX_TABLE(0b, 1b) | |
156 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) : : "cc" ); | |
157 | return reg1; | |
158 | } | |
159 | ||
cb17a636 FB |
160 | /** |
161 | * ap_interrupts_available(): Test if AP interrupts are available. | |
162 | * | |
163 | * Returns 1 if AP interrupts are available. | |
164 | */ | |
165 | static int ap_interrupts_available(void) | |
166 | { | |
53ec24b1 | 167 | return test_facility(2) && test_facility(65); |
cb17a636 FB |
168 | } |
169 | ||
75014550 HD |
170 | /** |
171 | * ap_configuration_available(): Test if AP configuration | |
172 | * information is available. | |
173 | * | |
174 | * Returns 1 if AP configuration information is available. | |
175 | */ | |
c80773e5 | 176 | #ifdef CONFIG_64BIT |
75014550 HD |
177 | static int ap_configuration_available(void) |
178 | { | |
179 | return test_facility(2) && test_facility(12); | |
180 | } | |
c80773e5 | 181 | #endif |
75014550 | 182 | |
1534c382 | 183 | /** |
1749a81d FB |
184 | * ap_test_queue(): Test adjunct processor queue. |
185 | * @qid: The AP queue number | |
186 | * @queue_depth: Pointer to queue depth value | |
187 | * @device_type: Pointer to device type value | |
1534c382 | 188 | * |
1749a81d | 189 | * Returns AP queue status structure. |
1534c382 MS |
190 | */ |
191 | static inline struct ap_queue_status | |
192 | ap_test_queue(ap_qid_t qid, int *queue_depth, int *device_type) | |
193 | { | |
194 | register unsigned long reg0 asm ("0") = qid; | |
195 | register struct ap_queue_status reg1 asm ("1"); | |
196 | register unsigned long reg2 asm ("2") = 0UL; | |
197 | ||
198 | asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ | |
199 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
200 | *device_type = (int) (reg2 >> 24); | |
201 | *queue_depth = (int) (reg2 & 0xff); | |
202 | return reg1; | |
203 | } | |
204 | ||
205 | /** | |
1749a81d FB |
206 | * ap_reset_queue(): Reset adjunct processor queue. |
207 | * @qid: The AP queue number | |
1534c382 | 208 | * |
1749a81d | 209 | * Returns AP queue status structure. |
1534c382 MS |
210 | */ |
211 | static inline struct ap_queue_status ap_reset_queue(ap_qid_t qid) | |
212 | { | |
213 | register unsigned long reg0 asm ("0") = qid | 0x01000000UL; | |
214 | register struct ap_queue_status reg1 asm ("1"); | |
215 | register unsigned long reg2 asm ("2") = 0UL; | |
216 | ||
217 | asm volatile( | |
218 | ".long 0xb2af0000" /* PQAP(RAPQ) */ | |
219 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
220 | return reg1; | |
221 | } | |
222 | ||
cb17a636 FB |
223 | #ifdef CONFIG_64BIT |
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 | } | |
245 | #endif | |
246 | ||
6bed05bc HD |
247 | #ifdef CONFIG_64BIT |
248 | static inline struct ap_queue_status | |
249 | __ap_query_functions(ap_qid_t qid, unsigned int *functions) | |
b1f933da FB |
250 | { |
251 | register unsigned long reg0 asm ("0") = 0UL | qid | (1UL << 23); | |
6bed05bc HD |
252 | register struct ap_queue_status reg1 asm ("1") = AP_QUEUE_STATUS_INVALID; |
253 | register unsigned long reg2 asm ("2"); | |
b1f933da FB |
254 | |
255 | asm volatile( | |
a7475afd | 256 | ".long 0xb2af0000\n" /* PQAP(TAPQ) */ |
6bed05bc HD |
257 | "0:\n" |
258 | EX_TABLE(0b, 0b) | |
259 | : "+d" (reg0), "+d" (reg1), "=d" (reg2) | |
b1f933da FB |
260 | : |
261 | : "cc"); | |
262 | ||
6bed05bc | 263 | *functions = (unsigned int)(reg2 >> 32); |
b1f933da FB |
264 | return reg1; |
265 | } | |
6bed05bc | 266 | #endif |
b1f933da | 267 | |
75014550 HD |
268 | #ifdef CONFIG_64BIT |
269 | static inline int __ap_query_configuration(struct ap_config_info *config) | |
270 | { | |
271 | register unsigned long reg0 asm ("0") = 0x04000000UL; | |
272 | register unsigned long reg1 asm ("1") = -EINVAL; | |
273 | register unsigned char *reg2 asm ("2") = (unsigned char *)config; | |
274 | ||
275 | asm volatile( | |
276 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
277 | "0: la %1,0\n" | |
278 | "1:\n" | |
279 | EX_TABLE(0b, 1b) | |
280 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) | |
281 | : | |
282 | : "cc"); | |
283 | ||
284 | return reg1; | |
285 | } | |
286 | #endif | |
287 | ||
b1f933da | 288 | /** |
6bed05bc | 289 | * ap_query_functions(): Query supported functions. |
b1f933da | 290 | * @qid: The AP queue number |
6bed05bc | 291 | * @functions: Pointer to functions field. |
b1f933da | 292 | * |
6bed05bc HD |
293 | * Returns |
294 | * 0 on success. | |
295 | * -ENODEV if queue not valid. | |
296 | * -EBUSY if device busy. | |
297 | * -EINVAL if query function is not supported | |
b1f933da | 298 | */ |
6bed05bc | 299 | static int ap_query_functions(ap_qid_t qid, unsigned int *functions) |
b1f933da | 300 | { |
6bed05bc | 301 | #ifdef CONFIG_64BIT |
b1f933da | 302 | struct ap_queue_status status; |
6bed05bc HD |
303 | int i; |
304 | status = __ap_query_functions(qid, functions); | |
b1f933da FB |
305 | |
306 | for (i = 0; i < AP_MAX_RESET; i++) { | |
6bed05bc HD |
307 | if (ap_queue_status_invalid_test(&status)) |
308 | return -ENODEV; | |
309 | ||
b1f933da FB |
310 | switch (status.response_code) { |
311 | case AP_RESPONSE_NORMAL: | |
6bed05bc | 312 | return 0; |
b1f933da FB |
313 | case AP_RESPONSE_RESET_IN_PROGRESS: |
314 | case AP_RESPONSE_BUSY: | |
315 | break; | |
316 | case AP_RESPONSE_Q_NOT_AVAIL: | |
317 | case AP_RESPONSE_DECONFIGURED: | |
318 | case AP_RESPONSE_CHECKSTOPPED: | |
319 | case AP_RESPONSE_INVALID_ADDRESS: | |
6bed05bc | 320 | return -ENODEV; |
b1f933da FB |
321 | case AP_RESPONSE_OTHERWISE_CHANGED: |
322 | break; | |
323 | default: | |
324 | break; | |
325 | } | |
326 | if (i < AP_MAX_RESET - 1) { | |
327 | udelay(5); | |
6bed05bc | 328 | status = __ap_query_functions(qid, functions); |
b1f933da FB |
329 | } |
330 | } | |
6bed05bc HD |
331 | return -EBUSY; |
332 | #else | |
333 | return -EINVAL; | |
334 | #endif | |
335 | } | |
336 | ||
cb17a636 FB |
337 | /** |
338 | * ap_queue_enable_interruption(): Enable interruption on an AP. | |
339 | * @qid: The AP queue number | |
340 | * @ind: the notification indicator byte | |
341 | * | |
342 | * Enables interruption on AP queue via ap_queue_interruption_control(). Based | |
343 | * on the return value it waits a while and tests the AP queue if interrupts | |
344 | * have been switched on using ap_test_queue(). | |
345 | */ | |
346 | static int ap_queue_enable_interruption(ap_qid_t qid, void *ind) | |
347 | { | |
348 | #ifdef CONFIG_64BIT | |
349 | struct ap_queue_status status; | |
350 | int t_depth, t_device_type, rc, i; | |
351 | ||
352 | rc = -EBUSY; | |
353 | status = ap_queue_interruption_control(qid, ind); | |
354 | ||
355 | for (i = 0; i < AP_MAX_RESET; i++) { | |
356 | switch (status.response_code) { | |
357 | case AP_RESPONSE_NORMAL: | |
358 | if (status.int_enabled) | |
359 | return 0; | |
360 | break; | |
361 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
362 | case AP_RESPONSE_BUSY: | |
8738e07d HD |
363 | if (i < AP_MAX_RESET - 1) { |
364 | udelay(5); | |
365 | status = ap_queue_interruption_control(qid, | |
366 | ind); | |
367 | continue; | |
368 | } | |
cb17a636 FB |
369 | break; |
370 | case AP_RESPONSE_Q_NOT_AVAIL: | |
371 | case AP_RESPONSE_DECONFIGURED: | |
372 | case AP_RESPONSE_CHECKSTOPPED: | |
373 | case AP_RESPONSE_INVALID_ADDRESS: | |
374 | return -ENODEV; | |
375 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
376 | if (status.int_enabled) | |
377 | return 0; | |
378 | break; | |
379 | default: | |
380 | break; | |
381 | } | |
382 | if (i < AP_MAX_RESET - 1) { | |
383 | udelay(5); | |
384 | status = ap_test_queue(qid, &t_depth, &t_device_type); | |
385 | } | |
386 | } | |
387 | return rc; | |
388 | #else | |
389 | return -EINVAL; | |
390 | #endif | |
391 | } | |
392 | ||
1534c382 | 393 | /** |
1749a81d FB |
394 | * __ap_send(): Send message to adjunct processor queue. |
395 | * @qid: The AP queue number | |
396 | * @psmid: The program supplied message identifier | |
397 | * @msg: The message text | |
398 | * @length: The message length | |
a6a5d73a | 399 | * @special: Special Bit |
1534c382 | 400 | * |
1749a81d | 401 | * Returns AP queue status structure. |
1534c382 | 402 | * Condition code 1 on NQAP can't happen because the L bit is 1. |
1534c382 MS |
403 | * Condition code 2 on NQAP also means the send is incomplete, |
404 | * because a segment boundary was reached. The NQAP is repeated. | |
405 | */ | |
406 | static inline struct ap_queue_status | |
a6a5d73a FB |
407 | __ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length, |
408 | unsigned int special) | |
1534c382 MS |
409 | { |
410 | typedef struct { char _[length]; } msgblock; | |
411 | register unsigned long reg0 asm ("0") = qid | 0x40000000UL; | |
412 | register struct ap_queue_status reg1 asm ("1"); | |
413 | register unsigned long reg2 asm ("2") = (unsigned long) msg; | |
414 | register unsigned long reg3 asm ("3") = (unsigned long) length; | |
415 | register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32); | |
416 | register unsigned long reg5 asm ("5") = (unsigned int) psmid; | |
417 | ||
a6a5d73a FB |
418 | if (special == 1) |
419 | reg0 |= 0x400000UL; | |
420 | ||
1534c382 | 421 | asm volatile ( |
a7475afd | 422 | "0: .long 0xb2ad0042\n" /* NQAP */ |
1534c382 MS |
423 | " brc 2,0b" |
424 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) | |
425 | : "d" (reg4), "d" (reg5), "m" (*(msgblock *) msg) | |
426 | : "cc" ); | |
427 | return reg1; | |
428 | } | |
429 | ||
430 | int ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) | |
431 | { | |
432 | struct ap_queue_status status; | |
433 | ||
a6a5d73a | 434 | status = __ap_send(qid, psmid, msg, length, 0); |
1534c382 MS |
435 | switch (status.response_code) { |
436 | case AP_RESPONSE_NORMAL: | |
437 | return 0; | |
438 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 439 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 | 440 | return -EBUSY; |
a6a5d73a FB |
441 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
442 | return -EINVAL; | |
1534c382 MS |
443 | default: /* Device is gone. */ |
444 | return -ENODEV; | |
445 | } | |
446 | } | |
447 | EXPORT_SYMBOL(ap_send); | |
448 | ||
1749a81d FB |
449 | /** |
450 | * __ap_recv(): Receive message from adjunct processor queue. | |
451 | * @qid: The AP queue number | |
452 | * @psmid: Pointer to program supplied message identifier | |
453 | * @msg: The message text | |
454 | * @length: The message length | |
1534c382 | 455 | * |
1749a81d | 456 | * Returns AP queue status structure. |
1534c382 MS |
457 | * Condition code 1 on DQAP means the receive has taken place |
458 | * but only partially. The response is incomplete, hence the | |
459 | * DQAP is repeated. | |
1534c382 MS |
460 | * Condition code 2 on DQAP also means the receive is incomplete, |
461 | * this time because a segment boundary was reached. Again, the | |
462 | * DQAP is repeated. | |
1534c382 MS |
463 | * Note that gpr2 is used by the DQAP instruction to keep track of |
464 | * any 'residual' length, in case the instruction gets interrupted. | |
465 | * Hence it gets zeroed before the instruction. | |
466 | */ | |
467 | static inline struct ap_queue_status | |
468 | __ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
469 | { | |
470 | typedef struct { char _[length]; } msgblock; | |
471 | register unsigned long reg0 asm("0") = qid | 0x80000000UL; | |
472 | register struct ap_queue_status reg1 asm ("1"); | |
473 | register unsigned long reg2 asm("2") = 0UL; | |
474 | register unsigned long reg4 asm("4") = (unsigned long) msg; | |
475 | register unsigned long reg5 asm("5") = (unsigned long) length; | |
476 | register unsigned long reg6 asm("6") = 0UL; | |
477 | register unsigned long reg7 asm("7") = 0UL; | |
478 | ||
479 | ||
480 | asm volatile( | |
a7475afd | 481 | "0: .long 0xb2ae0064\n" /* DQAP */ |
1534c382 MS |
482 | " brc 6,0b\n" |
483 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), | |
484 | "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7), | |
485 | "=m" (*(msgblock *) msg) : : "cc" ); | |
486 | *psmid = (((unsigned long long) reg6) << 32) + reg7; | |
487 | return reg1; | |
488 | } | |
489 | ||
490 | int ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
491 | { | |
492 | struct ap_queue_status status; | |
493 | ||
494 | status = __ap_recv(qid, psmid, msg, length); | |
495 | switch (status.response_code) { | |
496 | case AP_RESPONSE_NORMAL: | |
497 | return 0; | |
498 | case AP_RESPONSE_NO_PENDING_REPLY: | |
499 | if (status.queue_empty) | |
500 | return -ENOENT; | |
501 | return -EBUSY; | |
af512ed0 RW |
502 | case AP_RESPONSE_RESET_IN_PROGRESS: |
503 | return -EBUSY; | |
1534c382 MS |
504 | default: |
505 | return -ENODEV; | |
506 | } | |
507 | } | |
508 | EXPORT_SYMBOL(ap_recv); | |
509 | ||
510 | /** | |
1749a81d FB |
511 | * ap_query_queue(): Check if an AP queue is available. |
512 | * @qid: The AP queue number | |
513 | * @queue_depth: Pointer to queue depth value | |
514 | * @device_type: Pointer to device type value | |
515 | * | |
516 | * The test is repeated for AP_MAX_RESET times. | |
1534c382 MS |
517 | */ |
518 | static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type) | |
519 | { | |
520 | struct ap_queue_status status; | |
521 | int t_depth, t_device_type, rc, i; | |
522 | ||
523 | rc = -EBUSY; | |
524 | for (i = 0; i < AP_MAX_RESET; i++) { | |
525 | status = ap_test_queue(qid, &t_depth, &t_device_type); | |
526 | switch (status.response_code) { | |
527 | case AP_RESPONSE_NORMAL: | |
528 | *queue_depth = t_depth + 1; | |
529 | *device_type = t_device_type; | |
530 | rc = 0; | |
531 | break; | |
532 | case AP_RESPONSE_Q_NOT_AVAIL: | |
533 | rc = -ENODEV; | |
534 | break; | |
535 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
536 | break; | |
537 | case AP_RESPONSE_DECONFIGURED: | |
538 | rc = -ENODEV; | |
539 | break; | |
540 | case AP_RESPONSE_CHECKSTOPPED: | |
541 | rc = -ENODEV; | |
542 | break; | |
cb17a636 FB |
543 | case AP_RESPONSE_INVALID_ADDRESS: |
544 | rc = -ENODEV; | |
545 | break; | |
546 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
547 | break; | |
1534c382 MS |
548 | case AP_RESPONSE_BUSY: |
549 | break; | |
550 | default: | |
551 | BUG(); | |
552 | } | |
553 | if (rc != -EBUSY) | |
554 | break; | |
555 | if (i < AP_MAX_RESET - 1) | |
556 | udelay(5); | |
557 | } | |
558 | return rc; | |
559 | } | |
560 | ||
561 | /** | |
1749a81d FB |
562 | * ap_init_queue(): Reset an AP queue. |
563 | * @qid: The AP queue number | |
564 | * | |
1534c382 | 565 | * Reset an AP queue and wait for it to become available again. |
1534c382 MS |
566 | */ |
567 | static int ap_init_queue(ap_qid_t qid) | |
568 | { | |
569 | struct ap_queue_status status; | |
570 | int rc, dummy, i; | |
571 | ||
572 | rc = -ENODEV; | |
573 | status = ap_reset_queue(qid); | |
574 | for (i = 0; i < AP_MAX_RESET; i++) { | |
575 | switch (status.response_code) { | |
576 | case AP_RESPONSE_NORMAL: | |
577 | if (status.queue_empty) | |
578 | rc = 0; | |
579 | break; | |
580 | case AP_RESPONSE_Q_NOT_AVAIL: | |
581 | case AP_RESPONSE_DECONFIGURED: | |
582 | case AP_RESPONSE_CHECKSTOPPED: | |
583 | i = AP_MAX_RESET; /* return with -ENODEV */ | |
584 | break; | |
585 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
af512ed0 | 586 | rc = -EBUSY; |
1534c382 MS |
587 | case AP_RESPONSE_BUSY: |
588 | default: | |
589 | break; | |
590 | } | |
af512ed0 | 591 | if (rc != -ENODEV && rc != -EBUSY) |
1534c382 MS |
592 | break; |
593 | if (i < AP_MAX_RESET - 1) { | |
594 | udelay(5); | |
595 | status = ap_test_queue(qid, &dummy, &dummy); | |
596 | } | |
597 | } | |
cb17a636 | 598 | if (rc == 0 && ap_using_interrupts()) { |
f4eae94f | 599 | rc = ap_queue_enable_interruption(qid, ap_airq.lsi_ptr); |
cb17a636 FB |
600 | /* If interruption mode is supported by the machine, |
601 | * but an AP can not be enabled for interruption then | |
602 | * the AP will be discarded. */ | |
603 | if (rc) | |
604 | pr_err("Registering adapter interrupts for " | |
605 | "AP %d failed\n", AP_QID_DEVICE(qid)); | |
606 | } | |
1534c382 MS |
607 | return rc; |
608 | } | |
609 | ||
af512ed0 | 610 | /** |
1749a81d FB |
611 | * ap_increase_queue_count(): Arm request timeout. |
612 | * @ap_dev: Pointer to an AP device. | |
613 | * | |
614 | * Arm request timeout if an AP device was idle and a new request is submitted. | |
af512ed0 RW |
615 | */ |
616 | static void ap_increase_queue_count(struct ap_device *ap_dev) | |
617 | { | |
618 | int timeout = ap_dev->drv->request_timeout; | |
619 | ||
620 | ap_dev->queue_count++; | |
621 | if (ap_dev->queue_count == 1) { | |
622 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
623 | ap_dev->reset = AP_RESET_ARMED; | |
624 | } | |
625 | } | |
626 | ||
627 | /** | |
1749a81d FB |
628 | * ap_decrease_queue_count(): Decrease queue count. |
629 | * @ap_dev: Pointer to an AP device. | |
630 | * | |
631 | * If AP device is still alive, re-schedule request timeout if there are still | |
af512ed0 RW |
632 | * pending requests. |
633 | */ | |
634 | static void ap_decrease_queue_count(struct ap_device *ap_dev) | |
635 | { | |
636 | int timeout = ap_dev->drv->request_timeout; | |
637 | ||
638 | ap_dev->queue_count--; | |
639 | if (ap_dev->queue_count > 0) | |
640 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
641 | else | |
1749a81d | 642 | /* |
af512ed0 RW |
643 | * The timeout timer should to be disabled now - since |
644 | * del_timer_sync() is very expensive, we just tell via the | |
645 | * reset flag to ignore the pending timeout timer. | |
646 | */ | |
647 | ap_dev->reset = AP_RESET_IGNORE; | |
648 | } | |
649 | ||
1749a81d | 650 | /* |
1534c382 MS |
651 | * AP device related attributes. |
652 | */ | |
653 | static ssize_t ap_hwtype_show(struct device *dev, | |
654 | struct device_attribute *attr, char *buf) | |
655 | { | |
656 | struct ap_device *ap_dev = to_ap_dev(dev); | |
657 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->device_type); | |
658 | } | |
1534c382 | 659 | |
43c207e6 | 660 | static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL); |
1534c382 MS |
661 | static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr, |
662 | char *buf) | |
663 | { | |
664 | struct ap_device *ap_dev = to_ap_dev(dev); | |
665 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->queue_depth); | |
666 | } | |
1534c382 | 667 | |
43c207e6 | 668 | static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL); |
1534c382 MS |
669 | static ssize_t ap_request_count_show(struct device *dev, |
670 | struct device_attribute *attr, | |
671 | char *buf) | |
672 | { | |
673 | struct ap_device *ap_dev = to_ap_dev(dev); | |
674 | int rc; | |
675 | ||
676 | spin_lock_bh(&ap_dev->lock); | |
677 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->total_request_count); | |
678 | spin_unlock_bh(&ap_dev->lock); | |
679 | return rc; | |
680 | } | |
681 | ||
682 | static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL); | |
683 | ||
b26bd941 HD |
684 | static ssize_t ap_requestq_count_show(struct device *dev, |
685 | struct device_attribute *attr, char *buf) | |
686 | { | |
687 | struct ap_device *ap_dev = to_ap_dev(dev); | |
688 | int rc; | |
689 | ||
690 | spin_lock_bh(&ap_dev->lock); | |
691 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->requestq_count); | |
692 | spin_unlock_bh(&ap_dev->lock); | |
693 | return rc; | |
694 | } | |
695 | ||
696 | static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL); | |
697 | ||
698 | static ssize_t ap_pendingq_count_show(struct device *dev, | |
699 | struct device_attribute *attr, char *buf) | |
700 | { | |
701 | struct ap_device *ap_dev = to_ap_dev(dev); | |
702 | int rc; | |
703 | ||
704 | spin_lock_bh(&ap_dev->lock); | |
705 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->pendingq_count); | |
706 | spin_unlock_bh(&ap_dev->lock); | |
707 | return rc; | |
708 | } | |
709 | ||
710 | static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL); | |
711 | ||
1534c382 MS |
712 | static ssize_t ap_modalias_show(struct device *dev, |
713 | struct device_attribute *attr, char *buf) | |
714 | { | |
715 | return sprintf(buf, "ap:t%02X", to_ap_dev(dev)->device_type); | |
716 | } | |
717 | ||
718 | static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL); | |
719 | ||
b26bd941 HD |
720 | static ssize_t ap_functions_show(struct device *dev, |
721 | struct device_attribute *attr, char *buf) | |
722 | { | |
723 | struct ap_device *ap_dev = to_ap_dev(dev); | |
724 | return snprintf(buf, PAGE_SIZE, "0x%08X\n", ap_dev->functions); | |
725 | } | |
726 | ||
727 | static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL); | |
728 | ||
1534c382 MS |
729 | static struct attribute *ap_dev_attrs[] = { |
730 | &dev_attr_hwtype.attr, | |
731 | &dev_attr_depth.attr, | |
732 | &dev_attr_request_count.attr, | |
b26bd941 HD |
733 | &dev_attr_requestq_count.attr, |
734 | &dev_attr_pendingq_count.attr, | |
1534c382 | 735 | &dev_attr_modalias.attr, |
b26bd941 | 736 | &dev_attr_ap_functions.attr, |
1534c382 MS |
737 | NULL |
738 | }; | |
739 | static struct attribute_group ap_dev_attr_group = { | |
740 | .attrs = ap_dev_attrs | |
741 | }; | |
742 | ||
743 | /** | |
1749a81d FB |
744 | * ap_bus_match() |
745 | * @dev: Pointer to device | |
746 | * @drv: Pointer to device_driver | |
747 | * | |
1534c382 MS |
748 | * AP bus driver registration/unregistration. |
749 | */ | |
750 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
751 | { | |
752 | struct ap_device *ap_dev = to_ap_dev(dev); | |
753 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
754 | struct ap_device_id *id; | |
755 | ||
1749a81d | 756 | /* |
1534c382 MS |
757 | * Compare device type of the device with the list of |
758 | * supported types of the device_driver. | |
759 | */ | |
760 | for (id = ap_drv->ids; id->match_flags; id++) { | |
761 | if ((id->match_flags & AP_DEVICE_ID_MATCH_DEVICE_TYPE) && | |
762 | (id->dev_type != ap_dev->device_type)) | |
763 | continue; | |
764 | return 1; | |
765 | } | |
766 | return 0; | |
767 | } | |
768 | ||
769 | /** | |
1749a81d FB |
770 | * ap_uevent(): Uevent function for AP devices. |
771 | * @dev: Pointer to device | |
772 | * @env: Pointer to kobj_uevent_env | |
773 | * | |
774 | * It sets up a single environment variable DEV_TYPE which contains the | |
775 | * hardware device type. | |
1534c382 | 776 | */ |
7eff2e7a | 777 | static int ap_uevent (struct device *dev, struct kobj_uevent_env *env) |
1534c382 MS |
778 | { |
779 | struct ap_device *ap_dev = to_ap_dev(dev); | |
7eff2e7a | 780 | int retval = 0; |
1534c382 MS |
781 | |
782 | if (!ap_dev) | |
783 | return -ENODEV; | |
784 | ||
785 | /* Set up DEV_TYPE environment variable. */ | |
7eff2e7a | 786 | retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); |
bf62456e ER |
787 | if (retval) |
788 | return retval; | |
789 | ||
66a4263b | 790 | /* Add MODALIAS= */ |
7eff2e7a | 791 | retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); |
bf62456e | 792 | |
bf62456e | 793 | return retval; |
1534c382 MS |
794 | } |
795 | ||
772f5472 FB |
796 | static int ap_bus_suspend(struct device *dev, pm_message_t state) |
797 | { | |
798 | struct ap_device *ap_dev = to_ap_dev(dev); | |
799 | unsigned long flags; | |
800 | ||
801 | if (!ap_suspend_flag) { | |
802 | ap_suspend_flag = 1; | |
803 | ||
804 | /* Disable scanning for devices, thus we do not want to scan | |
805 | * for them after removing. | |
806 | */ | |
807 | del_timer_sync(&ap_config_timer); | |
808 | if (ap_work_queue != NULL) { | |
809 | destroy_workqueue(ap_work_queue); | |
810 | ap_work_queue = NULL; | |
811 | } | |
5314af69 | 812 | |
772f5472 FB |
813 | tasklet_disable(&ap_tasklet); |
814 | } | |
815 | /* Poll on the device until all requests are finished. */ | |
816 | do { | |
817 | flags = 0; | |
95f1556c | 818 | spin_lock_bh(&ap_dev->lock); |
772f5472 | 819 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 820 | spin_unlock_bh(&ap_dev->lock); |
772f5472 FB |
821 | } while ((flags & 1) || (flags & 2)); |
822 | ||
5314af69 FB |
823 | spin_lock_bh(&ap_dev->lock); |
824 | ap_dev->unregistered = 1; | |
825 | spin_unlock_bh(&ap_dev->lock); | |
826 | ||
772f5472 FB |
827 | return 0; |
828 | } | |
829 | ||
830 | static int ap_bus_resume(struct device *dev) | |
831 | { | |
772f5472 | 832 | struct ap_device *ap_dev = to_ap_dev(dev); |
f4eae94f | 833 | int rc; |
772f5472 FB |
834 | |
835 | if (ap_suspend_flag) { | |
836 | ap_suspend_flag = 0; | |
f4eae94f MS |
837 | if (ap_interrupts_available()) { |
838 | if (!ap_using_interrupts()) { | |
839 | rc = register_adapter_interrupt(&ap_airq); | |
840 | ap_airq_flag = (rc == 0); | |
841 | } | |
842 | } else { | |
843 | if (ap_using_interrupts()) { | |
844 | unregister_adapter_interrupt(&ap_airq); | |
845 | ap_airq_flag = 0; | |
846 | } | |
847 | } | |
75014550 | 848 | ap_query_configuration(); |
5314af69 FB |
849 | if (!user_set_domain) { |
850 | ap_domain_index = -1; | |
851 | ap_select_domain(); | |
852 | } | |
772f5472 FB |
853 | init_timer(&ap_config_timer); |
854 | ap_config_timer.function = ap_config_timeout; | |
855 | ap_config_timer.data = 0; | |
856 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
857 | add_timer(&ap_config_timer); | |
858 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
859 | if (!ap_work_queue) | |
860 | return -ENOMEM; | |
861 | tasklet_enable(&ap_tasklet); | |
862 | if (!ap_using_interrupts()) | |
863 | ap_schedule_poll_timer(); | |
864 | else | |
865 | tasklet_schedule(&ap_tasklet); | |
866 | if (ap_thread_flag) | |
867 | rc = ap_poll_thread_start(); | |
f4eae94f MS |
868 | else |
869 | rc = 0; | |
870 | } else | |
871 | rc = 0; | |
5314af69 FB |
872 | if (AP_QID_QUEUE(ap_dev->qid) != ap_domain_index) { |
873 | spin_lock_bh(&ap_dev->lock); | |
874 | ap_dev->qid = AP_MKQID(AP_QID_DEVICE(ap_dev->qid), | |
875 | ap_domain_index); | |
876 | spin_unlock_bh(&ap_dev->lock); | |
877 | } | |
878 | queue_work(ap_work_queue, &ap_config_work); | |
772f5472 FB |
879 | |
880 | return rc; | |
881 | } | |
882 | ||
1534c382 MS |
883 | static struct bus_type ap_bus_type = { |
884 | .name = "ap", | |
885 | .match = &ap_bus_match, | |
886 | .uevent = &ap_uevent, | |
772f5472 FB |
887 | .suspend = ap_bus_suspend, |
888 | .resume = ap_bus_resume | |
1534c382 MS |
889 | }; |
890 | ||
891 | static int ap_device_probe(struct device *dev) | |
892 | { | |
893 | struct ap_device *ap_dev = to_ap_dev(dev); | |
894 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); | |
895 | int rc; | |
896 | ||
897 | ap_dev->drv = ap_drv; | |
898 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; | |
faa582ca | 899 | if (!rc) { |
43c207e6 | 900 | spin_lock_bh(&ap_device_list_lock); |
faa582ca | 901 | list_add(&ap_dev->list, &ap_device_list); |
43c207e6 | 902 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca | 903 | } |
1534c382 MS |
904 | return rc; |
905 | } | |
906 | ||
907 | /** | |
1749a81d FB |
908 | * __ap_flush_queue(): Flush requests. |
909 | * @ap_dev: Pointer to the AP device | |
910 | * | |
1534c382 | 911 | * Flush all requests from the request/pending queue of an AP device. |
1534c382 | 912 | */ |
4d284cac | 913 | static void __ap_flush_queue(struct ap_device *ap_dev) |
1534c382 MS |
914 | { |
915 | struct ap_message *ap_msg, *next; | |
916 | ||
917 | list_for_each_entry_safe(ap_msg, next, &ap_dev->pendingq, list) { | |
918 | list_del_init(&ap_msg->list); | |
919 | ap_dev->pendingq_count--; | |
54a8f561 | 920 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
921 | } |
922 | list_for_each_entry_safe(ap_msg, next, &ap_dev->requestq, list) { | |
923 | list_del_init(&ap_msg->list); | |
924 | ap_dev->requestq_count--; | |
54a8f561 | 925 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
926 | } |
927 | } | |
928 | ||
929 | void ap_flush_queue(struct ap_device *ap_dev) | |
930 | { | |
931 | spin_lock_bh(&ap_dev->lock); | |
932 | __ap_flush_queue(ap_dev); | |
933 | spin_unlock_bh(&ap_dev->lock); | |
934 | } | |
935 | EXPORT_SYMBOL(ap_flush_queue); | |
936 | ||
937 | static int ap_device_remove(struct device *dev) | |
938 | { | |
939 | struct ap_device *ap_dev = to_ap_dev(dev); | |
940 | struct ap_driver *ap_drv = ap_dev->drv; | |
941 | ||
4e56296d | 942 | ap_flush_queue(ap_dev); |
af512ed0 | 943 | del_timer_sync(&ap_dev->timeout); |
43c207e6 | 944 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 945 | list_del_init(&ap_dev->list); |
43c207e6 | 946 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca RW |
947 | if (ap_drv->remove) |
948 | ap_drv->remove(ap_dev); | |
e675c0d2 RW |
949 | spin_lock_bh(&ap_dev->lock); |
950 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
951 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
952 | return 0; |
953 | } | |
954 | ||
955 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, | |
956 | char *name) | |
957 | { | |
958 | struct device_driver *drv = &ap_drv->driver; | |
959 | ||
960 | drv->bus = &ap_bus_type; | |
961 | drv->probe = ap_device_probe; | |
962 | drv->remove = ap_device_remove; | |
963 | drv->owner = owner; | |
964 | drv->name = name; | |
965 | return driver_register(drv); | |
966 | } | |
967 | EXPORT_SYMBOL(ap_driver_register); | |
968 | ||
969 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
970 | { | |
971 | driver_unregister(&ap_drv->driver); | |
972 | } | |
973 | EXPORT_SYMBOL(ap_driver_unregister); | |
974 | ||
dabecb29 HD |
975 | void ap_bus_force_rescan(void) |
976 | { | |
56bbe686 IT |
977 | /* reconfigure the AP bus rescan timer. */ |
978 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); | |
979 | /* processing a asynchronous bus rescan */ | |
980 | queue_work(ap_work_queue, &ap_config_work); | |
981 | flush_work(&ap_config_work); | |
dabecb29 HD |
982 | } |
983 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
984 | ||
1749a81d | 985 | /* |
1534c382 MS |
986 | * AP bus attributes. |
987 | */ | |
988 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) | |
989 | { | |
990 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); | |
991 | } | |
992 | ||
993 | static BUS_ATTR(ap_domain, 0444, ap_domain_show, NULL); | |
994 | ||
995 | static ssize_t ap_config_time_show(struct bus_type *bus, char *buf) | |
996 | { | |
997 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); | |
998 | } | |
999 | ||
cb17a636 FB |
1000 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
1001 | { | |
1002 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
1003 | ap_using_interrupts() ? 1 : 0); | |
1004 | } | |
1005 | ||
1006 | static BUS_ATTR(ap_interrupts, 0444, ap_interrupts_show, NULL); | |
1007 | ||
1534c382 MS |
1008 | static ssize_t ap_config_time_store(struct bus_type *bus, |
1009 | const char *buf, size_t count) | |
1010 | { | |
1011 | int time; | |
1012 | ||
1013 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1014 | return -EINVAL; | |
1015 | ap_config_time = time; | |
1016 | if (!timer_pending(&ap_config_timer) || | |
1017 | !mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ)) { | |
1018 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1019 | add_timer(&ap_config_timer); | |
1020 | } | |
1021 | return count; | |
1022 | } | |
1023 | ||
1024 | static BUS_ATTR(config_time, 0644, ap_config_time_show, ap_config_time_store); | |
1025 | ||
1026 | static ssize_t ap_poll_thread_show(struct bus_type *bus, char *buf) | |
1027 | { | |
1028 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); | |
1029 | } | |
1030 | ||
1031 | static ssize_t ap_poll_thread_store(struct bus_type *bus, | |
1032 | const char *buf, size_t count) | |
1033 | { | |
1034 | int flag, rc; | |
1035 | ||
1036 | if (sscanf(buf, "%d\n", &flag) != 1) | |
1037 | return -EINVAL; | |
1038 | if (flag) { | |
1039 | rc = ap_poll_thread_start(); | |
1040 | if (rc) | |
1041 | return rc; | |
1042 | } | |
1043 | else | |
1044 | ap_poll_thread_stop(); | |
1045 | return count; | |
1046 | } | |
1047 | ||
1048 | static BUS_ATTR(poll_thread, 0644, ap_poll_thread_show, ap_poll_thread_store); | |
1049 | ||
fe137230 FB |
1050 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
1051 | { | |
1052 | return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); | |
1053 | } | |
1054 | ||
1055 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
1056 | size_t count) | |
1057 | { | |
1058 | unsigned long long time; | |
1059 | ktime_t hr_time; | |
1060 | ||
1061 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
1062 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
1063 | time > 120000000000ULL) | |
fe137230 FB |
1064 | return -EINVAL; |
1065 | poll_timeout = time; | |
1066 | hr_time = ktime_set(0, poll_timeout); | |
1067 | ||
1068 | if (!hrtimer_is_queued(&ap_poll_timer) || | |
6c644eae AV |
1069 | !hrtimer_forward(&ap_poll_timer, hrtimer_get_expires(&ap_poll_timer), hr_time)) { |
1070 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1071 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
fe137230 FB |
1072 | } |
1073 | return count; | |
1074 | } | |
1075 | ||
1076 | static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store); | |
1077 | ||
1534c382 MS |
1078 | static struct bus_attribute *const ap_bus_attrs[] = { |
1079 | &bus_attr_ap_domain, | |
1080 | &bus_attr_config_time, | |
1081 | &bus_attr_poll_thread, | |
cb17a636 | 1082 | &bus_attr_ap_interrupts, |
fe137230 FB |
1083 | &bus_attr_poll_timeout, |
1084 | NULL, | |
1534c382 MS |
1085 | }; |
1086 | ||
75014550 HD |
1087 | static inline int ap_test_config(unsigned int *field, unsigned int nr) |
1088 | { | |
1089 | if (nr > 0xFFu) | |
1090 | return 0; | |
1091 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
1096 | * @id AP card ID | |
1097 | * | |
1098 | * Returns 0 if the card is not configured | |
1099 | * 1 if the card is configured or | |
1100 | * if the configuration information is not available | |
1101 | */ | |
1102 | static inline int ap_test_config_card_id(unsigned int id) | |
1103 | { | |
1104 | if (!ap_configuration) | |
1105 | return 1; | |
1106 | return ap_test_config(ap_configuration->apm, id); | |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | * ap_test_config_domain(): Test, whether an AP usage domain is configured. | |
1111 | * @domain AP usage domain ID | |
1112 | * | |
1113 | * Returns 0 if the usage domain is not configured | |
1114 | * 1 if the usage domain is configured or | |
1115 | * if the configuration information is not available | |
1116 | */ | |
1117 | static inline int ap_test_config_domain(unsigned int domain) | |
1118 | { | |
1119 | if (!ap_configuration) | |
1120 | return 1; | |
1121 | return ap_test_config(ap_configuration->aqm, domain); | |
1122 | } | |
1123 | ||
1124 | /** | |
1125 | * ap_query_configuration(): Query AP configuration information. | |
1126 | * | |
1127 | * Query information of installed cards and configured domains from AP. | |
1128 | */ | |
1129 | static void ap_query_configuration(void) | |
1130 | { | |
1131 | #ifdef CONFIG_64BIT | |
1132 | if (ap_configuration_available()) { | |
1133 | if (!ap_configuration) | |
1134 | ap_configuration = | |
1135 | kzalloc(sizeof(struct ap_config_info), | |
1136 | GFP_KERNEL); | |
1137 | if (ap_configuration) | |
1138 | __ap_query_configuration(ap_configuration); | |
1139 | } else | |
1140 | ap_configuration = NULL; | |
1141 | #else | |
1142 | ap_configuration = NULL; | |
1143 | #endif | |
1144 | } | |
1145 | ||
1534c382 | 1146 | /** |
1749a81d FB |
1147 | * ap_select_domain(): Select an AP domain. |
1148 | * | |
1149 | * Pick one of the 16 AP domains. | |
1534c382 | 1150 | */ |
4d284cac | 1151 | static int ap_select_domain(void) |
1534c382 MS |
1152 | { |
1153 | int queue_depth, device_type, count, max_count, best_domain; | |
75014550 | 1154 | ap_qid_t qid; |
1534c382 MS |
1155 | int rc, i, j; |
1156 | ||
1749a81d | 1157 | /* |
1534c382 MS |
1158 | * We want to use a single domain. Either the one specified with |
1159 | * the "domain=" parameter or the domain with the maximum number | |
1160 | * of devices. | |
1161 | */ | |
1162 | if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS) | |
1163 | /* Domain has already been selected. */ | |
1164 | return 0; | |
1165 | best_domain = -1; | |
1166 | max_count = 0; | |
1167 | for (i = 0; i < AP_DOMAINS; i++) { | |
75014550 HD |
1168 | if (!ap_test_config_domain(i)) |
1169 | continue; | |
1534c382 MS |
1170 | count = 0; |
1171 | for (j = 0; j < AP_DEVICES; j++) { | |
75014550 HD |
1172 | if (!ap_test_config_card_id(j)) |
1173 | continue; | |
1174 | qid = AP_MKQID(j, i); | |
1534c382 MS |
1175 | rc = ap_query_queue(qid, &queue_depth, &device_type); |
1176 | if (rc) | |
1177 | continue; | |
1178 | count++; | |
1179 | } | |
1180 | if (count > max_count) { | |
1181 | max_count = count; | |
1182 | best_domain = i; | |
1183 | } | |
1184 | } | |
1185 | if (best_domain >= 0){ | |
1186 | ap_domain_index = best_domain; | |
1187 | return 0; | |
1188 | } | |
1189 | return -ENODEV; | |
1190 | } | |
1191 | ||
1192 | /** | |
1749a81d | 1193 | * ap_probe_device_type(): Find the device type of an AP. |
1534c382 | 1194 | * @ap_dev: pointer to the AP device. |
1749a81d FB |
1195 | * |
1196 | * Find the device type if query queue returned a device type of 0. | |
1534c382 MS |
1197 | */ |
1198 | static int ap_probe_device_type(struct ap_device *ap_dev) | |
1199 | { | |
1200 | static unsigned char msg[] = { | |
1201 | 0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00, | |
1202 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1203 | 0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00, | |
1204 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1205 | 0x01,0x00,0x43,0x43,0x41,0x2d,0x41,0x50, | |
1206 | 0x50,0x4c,0x20,0x20,0x20,0x01,0x01,0x01, | |
1207 | 0x00,0x00,0x00,0x00,0x50,0x4b,0x00,0x00, | |
1208 | 0x00,0x00,0x01,0x1c,0x00,0x00,0x00,0x00, | |
1209 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1210 | 0x00,0x00,0x05,0xb8,0x00,0x00,0x00,0x00, | |
1211 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1212 | 0x70,0x00,0x41,0x00,0x00,0x00,0x00,0x00, | |
1213 | 0x00,0x00,0x54,0x32,0x01,0x00,0xa0,0x00, | |
1214 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1215 | 0x00,0x00,0x00,0x00,0xb8,0x05,0x00,0x00, | |
1216 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1217 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1218 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1219 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1220 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1221 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1222 | 0x00,0x00,0x0a,0x00,0x00,0x00,0x00,0x00, | |
1223 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1224 | 0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00, | |
1225 | 0x49,0x43,0x53,0x46,0x20,0x20,0x20,0x20, | |
1226 | 0x50,0x4b,0x0a,0x00,0x50,0x4b,0x43,0x53, | |
1227 | 0x2d,0x31,0x2e,0x32,0x37,0x00,0x11,0x22, | |
1228 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1229 | 0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88, | |
1230 | 0x99,0x00,0x11,0x22,0x33,0x44,0x55,0x66, | |
1231 | 0x77,0x88,0x99,0x00,0x11,0x22,0x33,0x44, | |
1232 | 0x55,0x66,0x77,0x88,0x99,0x00,0x11,0x22, | |
1233 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1234 | 0x11,0x22,0x33,0x5d,0x00,0x5b,0x00,0x77, | |
1235 | 0x88,0x1e,0x00,0x00,0x57,0x00,0x00,0x00, | |
1236 | 0x00,0x04,0x00,0x00,0x4f,0x00,0x00,0x00, | |
1237 | 0x03,0x02,0x00,0x00,0x40,0x01,0x00,0x01, | |
1238 | 0xce,0x02,0x68,0x2d,0x5f,0xa9,0xde,0x0c, | |
1239 | 0xf6,0xd2,0x7b,0x58,0x4b,0xf9,0x28,0x68, | |
1240 | 0x3d,0xb4,0xf4,0xef,0x78,0xd5,0xbe,0x66, | |
1241 | 0x63,0x42,0xef,0xf8,0xfd,0xa4,0xf8,0xb0, | |
1242 | 0x8e,0x29,0xc2,0xc9,0x2e,0xd8,0x45,0xb8, | |
1243 | 0x53,0x8c,0x6f,0x4e,0x72,0x8f,0x6c,0x04, | |
1244 | 0x9c,0x88,0xfc,0x1e,0xc5,0x83,0x55,0x57, | |
1245 | 0xf7,0xdd,0xfd,0x4f,0x11,0x36,0x95,0x5d, | |
1246 | }; | |
1247 | struct ap_queue_status status; | |
1248 | unsigned long long psmid; | |
1249 | char *reply; | |
1250 | int rc, i; | |
1251 | ||
1252 | reply = (void *) get_zeroed_page(GFP_KERNEL); | |
1253 | if (!reply) { | |
1254 | rc = -ENOMEM; | |
1255 | goto out; | |
1256 | } | |
1257 | ||
1258 | status = __ap_send(ap_dev->qid, 0x0102030405060708ULL, | |
a6a5d73a | 1259 | msg, sizeof(msg), 0); |
1534c382 MS |
1260 | if (status.response_code != AP_RESPONSE_NORMAL) { |
1261 | rc = -ENODEV; | |
1262 | goto out_free; | |
1263 | } | |
1264 | ||
1265 | /* Wait for the test message to complete. */ | |
1266 | for (i = 0; i < 6; i++) { | |
1267 | mdelay(300); | |
1268 | status = __ap_recv(ap_dev->qid, &psmid, reply, 4096); | |
1269 | if (status.response_code == AP_RESPONSE_NORMAL && | |
1270 | psmid == 0x0102030405060708ULL) | |
1271 | break; | |
1272 | } | |
1273 | if (i < 6) { | |
1274 | /* Got an answer. */ | |
1275 | if (reply[0] == 0x00 && reply[1] == 0x86) | |
1276 | ap_dev->device_type = AP_DEVICE_TYPE_PCICC; | |
1277 | else | |
1278 | ap_dev->device_type = AP_DEVICE_TYPE_PCICA; | |
1279 | rc = 0; | |
1280 | } else | |
1281 | rc = -ENODEV; | |
1282 | ||
1283 | out_free: | |
1284 | free_page((unsigned long) reply); | |
1285 | out: | |
1286 | return rc; | |
1287 | } | |
1288 | ||
f4eae94f | 1289 | static void ap_interrupt_handler(struct airq_struct *airq) |
cb17a636 | 1290 | { |
420f42ec | 1291 | inc_irq_stat(IRQIO_APB); |
cb17a636 FB |
1292 | tasklet_schedule(&ap_tasklet); |
1293 | } | |
1294 | ||
1534c382 | 1295 | /** |
1749a81d FB |
1296 | * __ap_scan_bus(): Scan the AP bus. |
1297 | * @dev: Pointer to device | |
1298 | * @data: Pointer to data | |
1299 | * | |
1300 | * Scan the AP bus for new devices. | |
1534c382 MS |
1301 | */ |
1302 | static int __ap_scan_bus(struct device *dev, void *data) | |
1303 | { | |
1304 | return to_ap_dev(dev)->qid == (ap_qid_t)(unsigned long) data; | |
1305 | } | |
1306 | ||
1307 | static void ap_device_release(struct device *dev) | |
1308 | { | |
1309 | struct ap_device *ap_dev = to_ap_dev(dev); | |
1310 | ||
1311 | kfree(ap_dev); | |
1312 | } | |
1313 | ||
4927b3f7 | 1314 | static void ap_scan_bus(struct work_struct *unused) |
1534c382 MS |
1315 | { |
1316 | struct ap_device *ap_dev; | |
1317 | struct device *dev; | |
1318 | ap_qid_t qid; | |
1319 | int queue_depth, device_type; | |
6bed05bc | 1320 | unsigned int device_functions; |
1534c382 MS |
1321 | int rc, i; |
1322 | ||
75014550 | 1323 | ap_query_configuration(); |
56bbe686 | 1324 | if (ap_select_domain() != 0) { |
1534c382 | 1325 | return; |
56bbe686 | 1326 | } |
1534c382 MS |
1327 | for (i = 0; i < AP_DEVICES; i++) { |
1328 | qid = AP_MKQID(i, ap_domain_index); | |
1329 | dev = bus_find_device(&ap_bus_type, NULL, | |
1330 | (void *)(unsigned long)qid, | |
1331 | __ap_scan_bus); | |
75014550 HD |
1332 | if (ap_test_config_card_id(i)) |
1333 | rc = ap_query_queue(qid, &queue_depth, &device_type); | |
1334 | else | |
1335 | rc = -ENODEV; | |
c6a48264 | 1336 | if (dev) { |
af512ed0 RW |
1337 | if (rc == -EBUSY) { |
1338 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1339 | schedule_timeout(AP_RESET_TIMEOUT); | |
1340 | rc = ap_query_queue(qid, &queue_depth, | |
1341 | &device_type); | |
1342 | } | |
c6a48264 RW |
1343 | ap_dev = to_ap_dev(dev); |
1344 | spin_lock_bh(&ap_dev->lock); | |
1345 | if (rc || ap_dev->unregistered) { | |
1346 | spin_unlock_bh(&ap_dev->lock); | |
5314af69 FB |
1347 | if (ap_dev->unregistered) |
1348 | i--; | |
c6a48264 | 1349 | device_unregister(dev); |
af512ed0 | 1350 | put_device(dev); |
c6a48264 | 1351 | continue; |
af512ed0 RW |
1352 | } |
1353 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
1354 | put_device(dev); |
1355 | continue; | |
1356 | } | |
1534c382 MS |
1357 | if (rc) |
1358 | continue; | |
1359 | rc = ap_init_queue(qid); | |
1360 | if (rc) | |
1361 | continue; | |
1362 | ap_dev = kzalloc(sizeof(*ap_dev), GFP_KERNEL); | |
1363 | if (!ap_dev) | |
1364 | break; | |
1365 | ap_dev->qid = qid; | |
1366 | ap_dev->queue_depth = queue_depth; | |
4e56296d | 1367 | ap_dev->unregistered = 1; |
1534c382 MS |
1368 | spin_lock_init(&ap_dev->lock); |
1369 | INIT_LIST_HEAD(&ap_dev->pendingq); | |
1370 | INIT_LIST_HEAD(&ap_dev->requestq); | |
cf352ce0 | 1371 | INIT_LIST_HEAD(&ap_dev->list); |
af512ed0 RW |
1372 | setup_timer(&ap_dev->timeout, ap_request_timeout, |
1373 | (unsigned long) ap_dev); | |
6bed05bc HD |
1374 | switch (device_type) { |
1375 | case 0: | |
1e2076f4 | 1376 | /* device type probing for old cards */ |
cf2d007b HD |
1377 | if (ap_probe_device_type(ap_dev)) { |
1378 | kfree(ap_dev); | |
1379 | continue; | |
1380 | } | |
6bed05bc | 1381 | break; |
6bed05bc | 1382 | default: |
1534c382 | 1383 | ap_dev->device_type = device_type; |
6bed05bc | 1384 | } |
1534c382 | 1385 | |
1e2076f4 HD |
1386 | rc = ap_query_functions(qid, &device_functions); |
1387 | if (!rc) | |
1388 | ap_dev->functions = device_functions; | |
1389 | else | |
1390 | ap_dev->functions = 0u; | |
1391 | ||
1534c382 MS |
1392 | ap_dev->device.bus = &ap_bus_type; |
1393 | ap_dev->device.parent = ap_root_device; | |
edc44fa0 FB |
1394 | if (dev_set_name(&ap_dev->device, "card%02x", |
1395 | AP_QID_DEVICE(ap_dev->qid))) { | |
1396 | kfree(ap_dev); | |
1397 | continue; | |
1398 | } | |
1534c382 MS |
1399 | ap_dev->device.release = ap_device_release; |
1400 | rc = device_register(&ap_dev->device); | |
1401 | if (rc) { | |
c6304933 | 1402 | put_device(&ap_dev->device); |
1534c382 MS |
1403 | continue; |
1404 | } | |
1405 | /* Add device attributes. */ | |
1406 | rc = sysfs_create_group(&ap_dev->device.kobj, | |
1407 | &ap_dev_attr_group); | |
4e56296d RW |
1408 | if (!rc) { |
1409 | spin_lock_bh(&ap_dev->lock); | |
1410 | ap_dev->unregistered = 0; | |
1411 | spin_unlock_bh(&ap_dev->lock); | |
1412 | } | |
1413 | else | |
1534c382 MS |
1414 | device_unregister(&ap_dev->device); |
1415 | } | |
1416 | } | |
1417 | ||
1418 | static void | |
1419 | ap_config_timeout(unsigned long ptr) | |
1420 | { | |
1421 | queue_work(ap_work_queue, &ap_config_work); | |
1422 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1423 | add_timer(&ap_config_timer); | |
1424 | } | |
1425 | ||
1426 | /** | |
bc615dea | 1427 | * __ap_schedule_poll_timer(): Schedule poll timer. |
1749a81d | 1428 | * |
1534c382 MS |
1429 | * Set up the timer to run the poll tasklet |
1430 | */ | |
bc615dea | 1431 | static inline void __ap_schedule_poll_timer(void) |
1534c382 | 1432 | { |
8d406c6d | 1433 | ktime_t hr_time; |
93521314 FB |
1434 | |
1435 | spin_lock_bh(&ap_poll_timer_lock); | |
bc615dea | 1436 | if (hrtimer_is_queued(&ap_poll_timer) || ap_suspend_flag) |
93521314 | 1437 | goto out; |
8d406c6d FB |
1438 | if (ktime_to_ns(hrtimer_expires_remaining(&ap_poll_timer)) <= 0) { |
1439 | hr_time = ktime_set(0, poll_timeout); | |
1440 | hrtimer_forward_now(&ap_poll_timer, hr_time); | |
1441 | hrtimer_restart(&ap_poll_timer); | |
1442 | } | |
93521314 FB |
1443 | out: |
1444 | spin_unlock_bh(&ap_poll_timer_lock); | |
1534c382 MS |
1445 | } |
1446 | ||
bc615dea HD |
1447 | /** |
1448 | * ap_schedule_poll_timer(): Schedule poll timer. | |
1449 | * | |
1450 | * Set up the timer to run the poll tasklet | |
1451 | */ | |
1452 | static inline void ap_schedule_poll_timer(void) | |
1453 | { | |
1454 | if (ap_using_interrupts()) | |
1455 | return; | |
1456 | __ap_schedule_poll_timer(); | |
1457 | } | |
1458 | ||
1534c382 | 1459 | /** |
1749a81d | 1460 | * ap_poll_read(): Receive pending reply messages from an AP device. |
1534c382 MS |
1461 | * @ap_dev: pointer to the AP device |
1462 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1463 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1464 | * |
1534c382 MS |
1465 | * Returns 0 if the device is still present, -ENODEV if not. |
1466 | */ | |
4d284cac | 1467 | static int ap_poll_read(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1468 | { |
1469 | struct ap_queue_status status; | |
1470 | struct ap_message *ap_msg; | |
1471 | ||
1472 | if (ap_dev->queue_count <= 0) | |
1473 | return 0; | |
1474 | status = __ap_recv(ap_dev->qid, &ap_dev->reply->psmid, | |
1475 | ap_dev->reply->message, ap_dev->reply->length); | |
1476 | switch (status.response_code) { | |
1477 | case AP_RESPONSE_NORMAL: | |
1478 | atomic_dec(&ap_poll_requests); | |
af512ed0 | 1479 | ap_decrease_queue_count(ap_dev); |
1534c382 MS |
1480 | list_for_each_entry(ap_msg, &ap_dev->pendingq, list) { |
1481 | if (ap_msg->psmid != ap_dev->reply->psmid) | |
1482 | continue; | |
1483 | list_del_init(&ap_msg->list); | |
1484 | ap_dev->pendingq_count--; | |
54a8f561 | 1485 | ap_msg->receive(ap_dev, ap_msg, ap_dev->reply); |
1534c382 MS |
1486 | break; |
1487 | } | |
1488 | if (ap_dev->queue_count > 0) | |
1489 | *flags |= 1; | |
1490 | break; | |
1491 | case AP_RESPONSE_NO_PENDING_REPLY: | |
1492 | if (status.queue_empty) { | |
1493 | /* The card shouldn't forget requests but who knows. */ | |
e675c0d2 | 1494 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); |
1534c382 MS |
1495 | ap_dev->queue_count = 0; |
1496 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1497 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1498 | ap_dev->pendingq_count = 0; | |
1499 | } else | |
1500 | *flags |= 2; | |
1501 | break; | |
1502 | default: | |
1503 | return -ENODEV; | |
1504 | } | |
1505 | return 0; | |
1506 | } | |
1507 | ||
1508 | /** | |
1749a81d | 1509 | * ap_poll_write(): Send messages from the request queue to an AP device. |
1534c382 MS |
1510 | * @ap_dev: pointer to the AP device |
1511 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1512 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1513 | * |
1534c382 MS |
1514 | * Returns 0 if the device is still present, -ENODEV if not. |
1515 | */ | |
4d284cac | 1516 | static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1517 | { |
1518 | struct ap_queue_status status; | |
1519 | struct ap_message *ap_msg; | |
1520 | ||
1521 | if (ap_dev->requestq_count <= 0 || | |
1522 | ap_dev->queue_count >= ap_dev->queue_depth) | |
1523 | return 0; | |
1524 | /* Start the next request on the queue. */ | |
1525 | ap_msg = list_entry(ap_dev->requestq.next, struct ap_message, list); | |
1526 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a | 1527 | ap_msg->message, ap_msg->length, ap_msg->special); |
1534c382 MS |
1528 | switch (status.response_code) { |
1529 | case AP_RESPONSE_NORMAL: | |
1530 | atomic_inc(&ap_poll_requests); | |
af512ed0 | 1531 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1532 | list_move_tail(&ap_msg->list, &ap_dev->pendingq); |
1533 | ap_dev->requestq_count--; | |
1534 | ap_dev->pendingq_count++; | |
1535 | if (ap_dev->queue_count < ap_dev->queue_depth && | |
1536 | ap_dev->requestq_count > 0) | |
1537 | *flags |= 1; | |
1538 | *flags |= 2; | |
1539 | break; | |
af512ed0 | 1540 | case AP_RESPONSE_RESET_IN_PROGRESS: |
bc615dea HD |
1541 | __ap_schedule_poll_timer(); |
1542 | case AP_RESPONSE_Q_FULL: | |
1534c382 MS |
1543 | *flags |= 2; |
1544 | break; | |
1545 | case AP_RESPONSE_MESSAGE_TOO_BIG: | |
a6a5d73a | 1546 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 MS |
1547 | return -EINVAL; |
1548 | default: | |
1549 | return -ENODEV; | |
1550 | } | |
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | /** | |
1749a81d | 1555 | * ap_poll_queue(): Poll AP device for pending replies and send new messages. |
1534c382 MS |
1556 | * @ap_dev: pointer to the bus device |
1557 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1558 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d FB |
1559 | * |
1560 | * Poll AP device for pending replies and send new messages. If either | |
1561 | * ap_poll_read or ap_poll_write returns -ENODEV unregister the device. | |
1534c382 MS |
1562 | * Returns 0. |
1563 | */ | |
1564 | static inline int ap_poll_queue(struct ap_device *ap_dev, unsigned long *flags) | |
1565 | { | |
1566 | int rc; | |
1567 | ||
1568 | rc = ap_poll_read(ap_dev, flags); | |
1569 | if (rc) | |
1570 | return rc; | |
1571 | return ap_poll_write(ap_dev, flags); | |
1572 | } | |
1573 | ||
1574 | /** | |
1749a81d | 1575 | * __ap_queue_message(): Queue a message to a device. |
1534c382 MS |
1576 | * @ap_dev: pointer to the AP device |
1577 | * @ap_msg: the message to be queued | |
1749a81d FB |
1578 | * |
1579 | * Queue a message to a device. Returns 0 if successful. | |
1534c382 MS |
1580 | */ |
1581 | static int __ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1582 | { | |
1583 | struct ap_queue_status status; | |
1584 | ||
1585 | if (list_empty(&ap_dev->requestq) && | |
1586 | ap_dev->queue_count < ap_dev->queue_depth) { | |
1587 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a FB |
1588 | ap_msg->message, ap_msg->length, |
1589 | ap_msg->special); | |
1534c382 MS |
1590 | switch (status.response_code) { |
1591 | case AP_RESPONSE_NORMAL: | |
1592 | list_add_tail(&ap_msg->list, &ap_dev->pendingq); | |
1593 | atomic_inc(&ap_poll_requests); | |
1594 | ap_dev->pendingq_count++; | |
af512ed0 | 1595 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1596 | ap_dev->total_request_count++; |
1597 | break; | |
1598 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 1599 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 MS |
1600 | list_add_tail(&ap_msg->list, &ap_dev->requestq); |
1601 | ap_dev->requestq_count++; | |
1602 | ap_dev->total_request_count++; | |
1603 | return -EBUSY; | |
a6a5d73a | 1604 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 | 1605 | case AP_RESPONSE_MESSAGE_TOO_BIG: |
54a8f561 | 1606 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-EINVAL)); |
1534c382 MS |
1607 | return -EINVAL; |
1608 | default: /* Device is gone. */ | |
54a8f561 | 1609 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
1610 | return -ENODEV; |
1611 | } | |
1612 | } else { | |
1613 | list_add_tail(&ap_msg->list, &ap_dev->requestq); | |
1614 | ap_dev->requestq_count++; | |
1615 | ap_dev->total_request_count++; | |
1616 | return -EBUSY; | |
1617 | } | |
1618 | ap_schedule_poll_timer(); | |
1619 | return 0; | |
1620 | } | |
1621 | ||
1622 | void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1623 | { | |
1624 | unsigned long flags; | |
1625 | int rc; | |
1626 | ||
54a8f561 HD |
1627 | /* For asynchronous message handling a valid receive-callback |
1628 | * is required. */ | |
1629 | BUG_ON(!ap_msg->receive); | |
1630 | ||
1534c382 MS |
1631 | spin_lock_bh(&ap_dev->lock); |
1632 | if (!ap_dev->unregistered) { | |
1633 | /* Make room on the queue by polling for finished requests. */ | |
1634 | rc = ap_poll_queue(ap_dev, &flags); | |
1635 | if (!rc) | |
1636 | rc = __ap_queue_message(ap_dev, ap_msg); | |
1637 | if (!rc) | |
1638 | wake_up(&ap_poll_wait); | |
4e56296d RW |
1639 | if (rc == -ENODEV) |
1640 | ap_dev->unregistered = 1; | |
1534c382 | 1641 | } else { |
54a8f561 | 1642 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
c6a48264 | 1643 | rc = -ENODEV; |
1534c382 MS |
1644 | } |
1645 | spin_unlock_bh(&ap_dev->lock); | |
1646 | if (rc == -ENODEV) | |
1647 | device_unregister(&ap_dev->device); | |
1648 | } | |
1649 | EXPORT_SYMBOL(ap_queue_message); | |
1650 | ||
1651 | /** | |
1749a81d FB |
1652 | * ap_cancel_message(): Cancel a crypto request. |
1653 | * @ap_dev: The AP device that has the message queued | |
1654 | * @ap_msg: The message that is to be removed | |
1655 | * | |
1534c382 | 1656 | * Cancel a crypto request. This is done by removing the request |
1749a81d | 1657 | * from the device pending or request queue. Note that the |
1534c382 MS |
1658 | * request stays on the AP queue. When it finishes the message |
1659 | * reply will be discarded because the psmid can't be found. | |
1534c382 MS |
1660 | */ |
1661 | void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1662 | { | |
1663 | struct ap_message *tmp; | |
1664 | ||
1665 | spin_lock_bh(&ap_dev->lock); | |
1666 | if (!list_empty(&ap_msg->list)) { | |
1667 | list_for_each_entry(tmp, &ap_dev->pendingq, list) | |
1668 | if (tmp->psmid == ap_msg->psmid) { | |
1669 | ap_dev->pendingq_count--; | |
1670 | goto found; | |
1671 | } | |
1672 | ap_dev->requestq_count--; | |
1673 | found: | |
1674 | list_del_init(&ap_msg->list); | |
1675 | } | |
1676 | spin_unlock_bh(&ap_dev->lock); | |
1677 | } | |
1678 | EXPORT_SYMBOL(ap_cancel_message); | |
1679 | ||
1680 | /** | |
1749a81d | 1681 | * ap_poll_timeout(): AP receive polling for finished AP requests. |
fe137230 | 1682 | * @unused: Unused pointer. |
1749a81d | 1683 | * |
fe137230 | 1684 | * Schedules the AP tasklet using a high resolution timer. |
1534c382 | 1685 | */ |
fe137230 | 1686 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) |
1534c382 MS |
1687 | { |
1688 | tasklet_schedule(&ap_tasklet); | |
fe137230 | 1689 | return HRTIMER_NORESTART; |
1534c382 MS |
1690 | } |
1691 | ||
af512ed0 | 1692 | /** |
1749a81d FB |
1693 | * ap_reset(): Reset a not responding AP device. |
1694 | * @ap_dev: Pointer to the AP device | |
1695 | * | |
af512ed0 RW |
1696 | * Reset a not responding AP device and move all requests from the |
1697 | * pending queue to the request queue. | |
1698 | */ | |
1699 | static void ap_reset(struct ap_device *ap_dev) | |
1700 | { | |
1701 | int rc; | |
1702 | ||
1703 | ap_dev->reset = AP_RESET_IGNORE; | |
1704 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
1705 | ap_dev->queue_count = 0; | |
1706 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1707 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1708 | ap_dev->pendingq_count = 0; | |
1709 | rc = ap_init_queue(ap_dev->qid); | |
1710 | if (rc == -ENODEV) | |
1711 | ap_dev->unregistered = 1; | |
75464960 HD |
1712 | else |
1713 | __ap_schedule_poll_timer(); | |
af512ed0 RW |
1714 | } |
1715 | ||
43c207e6 | 1716 | static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 | 1717 | { |
1534c382 | 1718 | if (!ap_dev->unregistered) { |
c6a48264 | 1719 | if (ap_poll_queue(ap_dev, flags)) |
4e56296d | 1720 | ap_dev->unregistered = 1; |
af512ed0 RW |
1721 | if (ap_dev->reset == AP_RESET_DO) |
1722 | ap_reset(ap_dev); | |
c6a48264 | 1723 | } |
1534c382 MS |
1724 | return 0; |
1725 | } | |
1726 | ||
1749a81d FB |
1727 | /** |
1728 | * ap_poll_all(): Poll all AP devices. | |
1729 | * @dummy: Unused variable | |
1730 | * | |
1731 | * Poll all AP devices on the bus in a round robin fashion. Continue | |
1732 | * polling until bit 2^0 of the control flags is not set. If bit 2^1 | |
1733 | * of the control flags has been set arm the poll timer. | |
1734 | */ | |
1534c382 MS |
1735 | static void ap_poll_all(unsigned long dummy) |
1736 | { | |
1737 | unsigned long flags; | |
cf352ce0 | 1738 | struct ap_device *ap_dev; |
1534c382 | 1739 | |
cb17a636 FB |
1740 | /* Reset the indicator if interrupts are used. Thus new interrupts can |
1741 | * be received. Doing it in the beginning of the tasklet is therefor | |
1742 | * important that no requests on any AP get lost. | |
1743 | */ | |
1744 | if (ap_using_interrupts()) | |
f4eae94f | 1745 | xchg(ap_airq.lsi_ptr, 0); |
1534c382 MS |
1746 | do { |
1747 | flags = 0; | |
43c207e6 | 1748 | spin_lock(&ap_device_list_lock); |
cf352ce0 | 1749 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1750 | spin_lock(&ap_dev->lock); |
43c207e6 | 1751 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1752 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1753 | } |
43c207e6 | 1754 | spin_unlock(&ap_device_list_lock); |
1534c382 MS |
1755 | } while (flags & 1); |
1756 | if (flags & 2) | |
1757 | ap_schedule_poll_timer(); | |
1758 | } | |
1759 | ||
1760 | /** | |
1749a81d FB |
1761 | * ap_poll_thread(): Thread that polls for finished requests. |
1762 | * @data: Unused pointer | |
1763 | * | |
1534c382 MS |
1764 | * AP bus poll thread. The purpose of this thread is to poll for |
1765 | * finished requests in a loop if there is a "free" cpu - that is | |
1766 | * a cpu that doesn't have anything better to do. The polling stops | |
1767 | * as soon as there is another task or if all messages have been | |
1768 | * delivered. | |
1769 | */ | |
1770 | static int ap_poll_thread(void *data) | |
1771 | { | |
1772 | DECLARE_WAITQUEUE(wait, current); | |
1773 | unsigned long flags; | |
1774 | int requests; | |
cf352ce0 | 1775 | struct ap_device *ap_dev; |
1534c382 | 1776 | |
d83682b3 | 1777 | set_user_nice(current, 19); |
1534c382 | 1778 | while (1) { |
772f5472 FB |
1779 | if (ap_suspend_flag) |
1780 | return 0; | |
1534c382 MS |
1781 | if (need_resched()) { |
1782 | schedule(); | |
1783 | continue; | |
1784 | } | |
1785 | add_wait_queue(&ap_poll_wait, &wait); | |
1786 | set_current_state(TASK_INTERRUPTIBLE); | |
1787 | if (kthread_should_stop()) | |
1788 | break; | |
1789 | requests = atomic_read(&ap_poll_requests); | |
1790 | if (requests <= 0) | |
1791 | schedule(); | |
1792 | set_current_state(TASK_RUNNING); | |
1793 | remove_wait_queue(&ap_poll_wait, &wait); | |
1794 | ||
1534c382 | 1795 | flags = 0; |
43c207e6 | 1796 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 1797 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1798 | spin_lock(&ap_dev->lock); |
43c207e6 | 1799 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1800 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1801 | } |
43c207e6 | 1802 | spin_unlock_bh(&ap_device_list_lock); |
1534c382 MS |
1803 | } |
1804 | set_current_state(TASK_RUNNING); | |
1805 | remove_wait_queue(&ap_poll_wait, &wait); | |
1806 | return 0; | |
1807 | } | |
1808 | ||
1809 | static int ap_poll_thread_start(void) | |
1810 | { | |
1811 | int rc; | |
1812 | ||
772f5472 | 1813 | if (ap_using_interrupts() || ap_suspend_flag) |
cb17a636 | 1814 | return 0; |
1534c382 MS |
1815 | mutex_lock(&ap_poll_thread_mutex); |
1816 | if (!ap_poll_kthread) { | |
1817 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
ba8da213 | 1818 | rc = PTR_RET(ap_poll_kthread); |
1534c382 MS |
1819 | if (rc) |
1820 | ap_poll_kthread = NULL; | |
1821 | } | |
1822 | else | |
1823 | rc = 0; | |
1824 | mutex_unlock(&ap_poll_thread_mutex); | |
1825 | return rc; | |
1826 | } | |
1827 | ||
1828 | static void ap_poll_thread_stop(void) | |
1829 | { | |
1830 | mutex_lock(&ap_poll_thread_mutex); | |
1831 | if (ap_poll_kthread) { | |
1832 | kthread_stop(ap_poll_kthread); | |
1833 | ap_poll_kthread = NULL; | |
1834 | } | |
1835 | mutex_unlock(&ap_poll_thread_mutex); | |
1836 | } | |
1837 | ||
af512ed0 | 1838 | /** |
1749a81d FB |
1839 | * ap_request_timeout(): Handling of request timeouts |
1840 | * @data: Holds the AP device. | |
1841 | * | |
1842 | * Handles request timeouts. | |
af512ed0 RW |
1843 | */ |
1844 | static void ap_request_timeout(unsigned long data) | |
1845 | { | |
1846 | struct ap_device *ap_dev = (struct ap_device *) data; | |
1847 | ||
cb17a636 | 1848 | if (ap_dev->reset == AP_RESET_ARMED) { |
af512ed0 | 1849 | ap_dev->reset = AP_RESET_DO; |
cb17a636 FB |
1850 | |
1851 | if (ap_using_interrupts()) | |
1852 | tasklet_schedule(&ap_tasklet); | |
1853 | } | |
af512ed0 RW |
1854 | } |
1855 | ||
13e742ba RW |
1856 | static void ap_reset_domain(void) |
1857 | { | |
1858 | int i; | |
1859 | ||
39aa7cf6 RW |
1860 | if (ap_domain_index != -1) |
1861 | for (i = 0; i < AP_DEVICES; i++) | |
1862 | ap_reset_queue(AP_MKQID(i, ap_domain_index)); | |
13e742ba RW |
1863 | } |
1864 | ||
1865 | static void ap_reset_all(void) | |
85eca850 RW |
1866 | { |
1867 | int i, j; | |
1868 | ||
1869 | for (i = 0; i < AP_DOMAINS; i++) | |
1870 | for (j = 0; j < AP_DEVICES; j++) | |
1871 | ap_reset_queue(AP_MKQID(j, i)); | |
1872 | } | |
1873 | ||
1874 | static struct reset_call ap_reset_call = { | |
13e742ba | 1875 | .fn = ap_reset_all, |
85eca850 RW |
1876 | }; |
1877 | ||
1534c382 | 1878 | /** |
1749a81d FB |
1879 | * ap_module_init(): The module initialization code. |
1880 | * | |
1881 | * Initializes the module. | |
1534c382 MS |
1882 | */ |
1883 | int __init ap_module_init(void) | |
1884 | { | |
1885 | int rc, i; | |
1886 | ||
1887 | if (ap_domain_index < -1 || ap_domain_index >= AP_DOMAINS) { | |
136f7a1c MS |
1888 | pr_warning("%d is not a valid cryptographic domain\n", |
1889 | ap_domain_index); | |
1534c382 MS |
1890 | return -EINVAL; |
1891 | } | |
5314af69 FB |
1892 | /* In resume callback we need to know if the user had set the domain. |
1893 | * If so, we can not just reset it. | |
1894 | */ | |
1895 | if (ap_domain_index >= 0) | |
1896 | user_set_domain = 1; | |
1897 | ||
1534c382 | 1898 | if (ap_instructions_available() != 0) { |
136f7a1c MS |
1899 | pr_warning("The hardware system does not support " |
1900 | "AP instructions\n"); | |
1534c382 MS |
1901 | return -ENODEV; |
1902 | } | |
cb17a636 | 1903 | if (ap_interrupts_available()) { |
f4eae94f MS |
1904 | rc = register_adapter_interrupt(&ap_airq); |
1905 | ap_airq_flag = (rc == 0); | |
cb17a636 FB |
1906 | } |
1907 | ||
85eca850 | 1908 | register_reset_call(&ap_reset_call); |
1534c382 MS |
1909 | |
1910 | /* Create /sys/bus/ap. */ | |
1911 | rc = bus_register(&ap_bus_type); | |
1912 | if (rc) | |
1913 | goto out; | |
1914 | for (i = 0; ap_bus_attrs[i]; i++) { | |
1915 | rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]); | |
1916 | if (rc) | |
1917 | goto out_bus; | |
1918 | } | |
1919 | ||
1920 | /* Create /sys/devices/ap. */ | |
035da16f | 1921 | ap_root_device = root_device_register("ap"); |
ba8da213 | 1922 | rc = PTR_RET(ap_root_device); |
1534c382 MS |
1923 | if (rc) |
1924 | goto out_bus; | |
1925 | ||
1926 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
1927 | if (!ap_work_queue) { | |
1928 | rc = -ENOMEM; | |
1929 | goto out_root; | |
1930 | } | |
1931 | ||
75014550 | 1932 | ap_query_configuration(); |
1534c382 MS |
1933 | if (ap_select_domain() == 0) |
1934 | ap_scan_bus(NULL); | |
1935 | ||
1749a81d | 1936 | /* Setup the AP bus rescan timer. */ |
1534c382 MS |
1937 | init_timer(&ap_config_timer); |
1938 | ap_config_timer.function = ap_config_timeout; | |
1939 | ap_config_timer.data = 0; | |
1940 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1941 | add_timer(&ap_config_timer); | |
1942 | ||
fe137230 FB |
1943 | /* Setup the high resultion poll timer. |
1944 | * If we are running under z/VM adjust polling to z/VM polling rate. | |
1945 | */ | |
1946 | if (MACHINE_IS_VM) | |
1947 | poll_timeout = 1500000; | |
93521314 | 1948 | spin_lock_init(&ap_poll_timer_lock); |
fe137230 FB |
1949 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
1950 | ap_poll_timer.function = ap_poll_timeout; | |
1951 | ||
1534c382 MS |
1952 | /* Start the low priority AP bus poll thread. */ |
1953 | if (ap_thread_flag) { | |
1954 | rc = ap_poll_thread_start(); | |
1955 | if (rc) | |
1956 | goto out_work; | |
1957 | } | |
1958 | ||
1959 | return 0; | |
1960 | ||
1961 | out_work: | |
1962 | del_timer_sync(&ap_config_timer); | |
fe137230 | 1963 | hrtimer_cancel(&ap_poll_timer); |
1534c382 MS |
1964 | destroy_workqueue(ap_work_queue); |
1965 | out_root: | |
035da16f | 1966 | root_device_unregister(ap_root_device); |
1534c382 MS |
1967 | out_bus: |
1968 | while (i--) | |
1969 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
1970 | bus_unregister(&ap_bus_type); | |
1971 | out: | |
85eca850 | 1972 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
1973 | if (ap_using_interrupts()) |
1974 | unregister_adapter_interrupt(&ap_airq); | |
1534c382 MS |
1975 | return rc; |
1976 | } | |
1977 | ||
1978 | static int __ap_match_all(struct device *dev, void *data) | |
1979 | { | |
1980 | return 1; | |
1981 | } | |
1982 | ||
1983 | /** | |
1749a81d FB |
1984 | * ap_modules_exit(): The module termination code |
1985 | * | |
1986 | * Terminates the module. | |
1534c382 MS |
1987 | */ |
1988 | void ap_module_exit(void) | |
1989 | { | |
1990 | int i; | |
1991 | struct device *dev; | |
1992 | ||
13e742ba | 1993 | ap_reset_domain(); |
1534c382 MS |
1994 | ap_poll_thread_stop(); |
1995 | del_timer_sync(&ap_config_timer); | |
fe137230 | 1996 | hrtimer_cancel(&ap_poll_timer); |
1534c382 | 1997 | destroy_workqueue(ap_work_queue); |
13e742ba | 1998 | tasklet_kill(&ap_tasklet); |
035da16f | 1999 | root_device_unregister(ap_root_device); |
1534c382 MS |
2000 | while ((dev = bus_find_device(&ap_bus_type, NULL, NULL, |
2001 | __ap_match_all))) | |
2002 | { | |
2003 | device_unregister(dev); | |
2004 | put_device(dev); | |
2005 | } | |
2006 | for (i = 0; ap_bus_attrs[i]; i++) | |
2007 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
2008 | bus_unregister(&ap_bus_type); | |
85eca850 | 2009 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
2010 | if (ap_using_interrupts()) |
2011 | unregister_adapter_interrupt(&ap_airq); | |
1534c382 MS |
2012 | } |
2013 | ||
1534c382 MS |
2014 | module_init(ap_module_init); |
2015 | module_exit(ap_module_exit); |