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> |
5d26a105 | 47 | #include <linux/crypto.h> |
1534c382 MS |
48 | |
49 | #include "ap_bus.h" | |
50 | ||
51 | /* Some prototypes. */ | |
4927b3f7 | 52 | static void ap_scan_bus(struct work_struct *); |
1534c382 | 53 | static void ap_poll_all(unsigned long); |
fe137230 | 54 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *); |
1534c382 MS |
55 | static int ap_poll_thread_start(void); |
56 | static void ap_poll_thread_stop(void); | |
af512ed0 | 57 | static void ap_request_timeout(unsigned long); |
cb17a636 | 58 | static inline void ap_schedule_poll_timer(void); |
772f5472 FB |
59 | static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags); |
60 | static int ap_device_remove(struct device *dev); | |
61 | static int ap_device_probe(struct device *dev); | |
f4eae94f | 62 | static void ap_interrupt_handler(struct airq_struct *airq); |
772f5472 FB |
63 | static void ap_reset(struct ap_device *ap_dev); |
64 | static void ap_config_timeout(unsigned long ptr); | |
5314af69 | 65 | static int ap_select_domain(void); |
75014550 | 66 | static void ap_query_configuration(void); |
1534c382 | 67 | |
1749a81d | 68 | /* |
1534c382 MS |
69 | * Module description. |
70 | */ | |
71 | MODULE_AUTHOR("IBM Corporation"); | |
75014550 HD |
72 | MODULE_DESCRIPTION("Adjunct Processor Bus driver, " \ |
73 | "Copyright IBM Corp. 2006, 2012"); | |
1534c382 | 74 | MODULE_LICENSE("GPL"); |
5d26a105 | 75 | MODULE_ALIAS_CRYPTO("z90crypt"); |
1534c382 | 76 | |
1749a81d | 77 | /* |
1534c382 MS |
78 | * Module parameter |
79 | */ | |
80 | int ap_domain_index = -1; /* Adjunct Processor Domain Index */ | |
c1a42f49 | 81 | module_param_named(domain, ap_domain_index, int, S_IRUSR|S_IRGRP); |
1534c382 MS |
82 | MODULE_PARM_DESC(domain, "domain index for ap devices"); |
83 | EXPORT_SYMBOL(ap_domain_index); | |
84 | ||
b90b34c6 | 85 | static int ap_thread_flag = 0; |
c1a42f49 | 86 | module_param_named(poll_thread, ap_thread_flag, int, S_IRUSR|S_IRGRP); |
b90b34c6 | 87 | MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)."); |
1534c382 MS |
88 | |
89 | static struct device *ap_root_device = NULL; | |
75014550 | 90 | static struct ap_config_info *ap_configuration; |
43c207e6 | 91 | static DEFINE_SPINLOCK(ap_device_list_lock); |
cf352ce0 | 92 | static LIST_HEAD(ap_device_list); |
1534c382 | 93 | |
1749a81d | 94 | /* |
1534c382 MS |
95 | * Workqueue & timer for bus rescan. |
96 | */ | |
97 | static struct workqueue_struct *ap_work_queue; | |
98 | static struct timer_list ap_config_timer; | |
99 | static int ap_config_time = AP_CONFIG_TIME; | |
4927b3f7 | 100 | static DECLARE_WORK(ap_config_work, ap_scan_bus); |
1534c382 | 101 | |
1749a81d | 102 | /* |
cb17a636 | 103 | * Tasklet & timer for AP request polling and interrupts |
1534c382 | 104 | */ |
1534c382 MS |
105 | static DECLARE_TASKLET(ap_tasklet, ap_poll_all, 0); |
106 | static atomic_t ap_poll_requests = ATOMIC_INIT(0); | |
107 | static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait); | |
108 | static struct task_struct *ap_poll_kthread = NULL; | |
109 | static DEFINE_MUTEX(ap_poll_thread_mutex); | |
93521314 | 110 | static DEFINE_SPINLOCK(ap_poll_timer_lock); |
fe137230 FB |
111 | static struct hrtimer ap_poll_timer; |
112 | /* In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds. | |
113 | * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling.*/ | |
114 | static unsigned long long poll_timeout = 250000; | |
1534c382 | 115 | |
772f5472 FB |
116 | /* Suspend flag */ |
117 | static int ap_suspend_flag; | |
5314af69 FB |
118 | /* Flag to check if domain was set through module parameter domain=. This is |
119 | * important when supsend and resume is done in a z/VM environment where the | |
120 | * domain might change. */ | |
121 | static int user_set_domain = 0; | |
772f5472 FB |
122 | static struct bus_type ap_bus_type; |
123 | ||
f4eae94f MS |
124 | /* Adapter interrupt definitions */ |
125 | static int ap_airq_flag; | |
126 | ||
127 | static struct airq_struct ap_airq = { | |
128 | .handler = ap_interrupt_handler, | |
129 | .isc = AP_ISC, | |
130 | }; | |
131 | ||
cb17a636 FB |
132 | /** |
133 | * ap_using_interrupts() - Returns non-zero if interrupt support is | |
134 | * available. | |
135 | */ | |
136 | static inline int ap_using_interrupts(void) | |
137 | { | |
f4eae94f | 138 | return ap_airq_flag; |
cb17a636 FB |
139 | } |
140 | ||
1534c382 | 141 | /** |
1749a81d | 142 | * ap_intructions_available() - Test if AP instructions are available. |
1534c382 | 143 | * |
1749a81d | 144 | * Returns 0 if the AP instructions are installed. |
1534c382 MS |
145 | */ |
146 | static inline int ap_instructions_available(void) | |
147 | { | |
148 | register unsigned long reg0 asm ("0") = AP_MKQID(0,0); | |
149 | register unsigned long reg1 asm ("1") = -ENODEV; | |
150 | register unsigned long reg2 asm ("2") = 0UL; | |
151 | ||
152 | asm volatile( | |
153 | " .long 0xb2af0000\n" /* PQAP(TAPQ) */ | |
154 | "0: la %1,0\n" | |
155 | "1:\n" | |
156 | EX_TABLE(0b, 1b) | |
157 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) : : "cc" ); | |
158 | return reg1; | |
159 | } | |
160 | ||
cb17a636 FB |
161 | /** |
162 | * ap_interrupts_available(): Test if AP interrupts are available. | |
163 | * | |
164 | * Returns 1 if AP interrupts are available. | |
165 | */ | |
166 | static int ap_interrupts_available(void) | |
167 | { | |
86cd741b | 168 | return test_facility(65); |
cb17a636 FB |
169 | } |
170 | ||
75014550 HD |
171 | /** |
172 | * ap_configuration_available(): Test if AP configuration | |
173 | * information is available. | |
174 | * | |
175 | * Returns 1 if AP configuration information is available. | |
176 | */ | |
177 | static int ap_configuration_available(void) | |
178 | { | |
86cd741b | 179 | return test_facility(12); |
75014550 HD |
180 | } |
181 | ||
1534c382 | 182 | /** |
1749a81d FB |
183 | * ap_test_queue(): Test adjunct processor queue. |
184 | * @qid: The AP queue number | |
185 | * @queue_depth: Pointer to queue depth value | |
186 | * @device_type: Pointer to device type value | |
1534c382 | 187 | * |
1749a81d | 188 | * Returns AP queue status structure. |
1534c382 MS |
189 | */ |
190 | static inline struct ap_queue_status | |
191 | ap_test_queue(ap_qid_t qid, int *queue_depth, int *device_type) | |
192 | { | |
193 | register unsigned long reg0 asm ("0") = qid; | |
194 | register struct ap_queue_status reg1 asm ("1"); | |
195 | register unsigned long reg2 asm ("2") = 0UL; | |
196 | ||
197 | asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ | |
198 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
199 | *device_type = (int) (reg2 >> 24); | |
200 | *queue_depth = (int) (reg2 & 0xff); | |
201 | return reg1; | |
202 | } | |
203 | ||
5bc334bf IT |
204 | /** |
205 | * ap_query_facilities(): PQAP(TAPQ) query facilities. | |
206 | * @qid: The AP queue number | |
207 | * | |
208 | * Returns content of general register 2 after the PQAP(TAPQ) | |
209 | * instruction was called. | |
210 | */ | |
211 | static inline unsigned long ap_query_facilities(ap_qid_t qid) | |
212 | { | |
213 | register unsigned long reg0 asm ("0") = qid | 0x00800000UL; | |
214 | register unsigned long reg1 asm ("1"); | |
215 | register unsigned long reg2 asm ("2") = 0UL; | |
216 | ||
217 | asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ | |
218 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
219 | return reg2; | |
220 | } | |
221 | ||
1534c382 | 222 | /** |
1749a81d FB |
223 | * ap_reset_queue(): Reset adjunct processor queue. |
224 | * @qid: The AP queue number | |
1534c382 | 225 | * |
1749a81d | 226 | * Returns AP queue status structure. |
1534c382 MS |
227 | */ |
228 | static inline struct ap_queue_status ap_reset_queue(ap_qid_t qid) | |
229 | { | |
230 | register unsigned long reg0 asm ("0") = qid | 0x01000000UL; | |
231 | register struct ap_queue_status reg1 asm ("1"); | |
232 | register unsigned long reg2 asm ("2") = 0UL; | |
233 | ||
234 | asm volatile( | |
235 | ".long 0xb2af0000" /* PQAP(RAPQ) */ | |
236 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
237 | return reg1; | |
238 | } | |
239 | ||
cb17a636 FB |
240 | /** |
241 | * ap_queue_interruption_control(): Enable interruption for a specific AP. | |
242 | * @qid: The AP queue number | |
243 | * @ind: The notification indicator byte | |
244 | * | |
245 | * Returns AP queue status. | |
246 | */ | |
247 | static inline struct ap_queue_status | |
248 | ap_queue_interruption_control(ap_qid_t qid, void *ind) | |
249 | { | |
250 | register unsigned long reg0 asm ("0") = qid | 0x03000000UL; | |
251 | register unsigned long reg1_in asm ("1") = 0x0000800000000000UL | AP_ISC; | |
252 | register struct ap_queue_status reg1_out asm ("1"); | |
253 | register void *reg2 asm ("2") = ind; | |
254 | asm volatile( | |
a7475afd | 255 | ".long 0xb2af0000" /* PQAP(AQIC) */ |
cb17a636 FB |
256 | : "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2) |
257 | : | |
258 | : "cc" ); | |
259 | return reg1_out; | |
260 | } | |
cb17a636 | 261 | |
6bed05bc HD |
262 | static inline struct ap_queue_status |
263 | __ap_query_functions(ap_qid_t qid, unsigned int *functions) | |
b1f933da FB |
264 | { |
265 | register unsigned long reg0 asm ("0") = 0UL | qid | (1UL << 23); | |
6bed05bc HD |
266 | register struct ap_queue_status reg1 asm ("1") = AP_QUEUE_STATUS_INVALID; |
267 | register unsigned long reg2 asm ("2"); | |
b1f933da FB |
268 | |
269 | asm volatile( | |
a7475afd | 270 | ".long 0xb2af0000\n" /* PQAP(TAPQ) */ |
6bed05bc HD |
271 | "0:\n" |
272 | EX_TABLE(0b, 0b) | |
273 | : "+d" (reg0), "+d" (reg1), "=d" (reg2) | |
b1f933da FB |
274 | : |
275 | : "cc"); | |
276 | ||
6bed05bc | 277 | *functions = (unsigned int)(reg2 >> 32); |
b1f933da FB |
278 | return reg1; |
279 | } | |
280 | ||
75014550 HD |
281 | static inline int __ap_query_configuration(struct ap_config_info *config) |
282 | { | |
283 | register unsigned long reg0 asm ("0") = 0x04000000UL; | |
284 | register unsigned long reg1 asm ("1") = -EINVAL; | |
285 | register unsigned char *reg2 asm ("2") = (unsigned char *)config; | |
286 | ||
287 | asm volatile( | |
288 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
289 | "0: la %1,0\n" | |
290 | "1:\n" | |
291 | EX_TABLE(0b, 1b) | |
292 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) | |
293 | : | |
294 | : "cc"); | |
295 | ||
296 | return reg1; | |
297 | } | |
75014550 | 298 | |
b1f933da | 299 | /** |
6bed05bc | 300 | * ap_query_functions(): Query supported functions. |
b1f933da | 301 | * @qid: The AP queue number |
6bed05bc | 302 | * @functions: Pointer to functions field. |
b1f933da | 303 | * |
6bed05bc HD |
304 | * Returns |
305 | * 0 on success. | |
306 | * -ENODEV if queue not valid. | |
307 | * -EBUSY if device busy. | |
308 | * -EINVAL if query function is not supported | |
b1f933da | 309 | */ |
6bed05bc | 310 | static int ap_query_functions(ap_qid_t qid, unsigned int *functions) |
b1f933da FB |
311 | { |
312 | struct ap_queue_status status; | |
6bed05bc HD |
313 | int i; |
314 | status = __ap_query_functions(qid, functions); | |
b1f933da FB |
315 | |
316 | for (i = 0; i < AP_MAX_RESET; i++) { | |
6bed05bc HD |
317 | if (ap_queue_status_invalid_test(&status)) |
318 | return -ENODEV; | |
319 | ||
b1f933da FB |
320 | switch (status.response_code) { |
321 | case AP_RESPONSE_NORMAL: | |
6bed05bc | 322 | return 0; |
b1f933da FB |
323 | case AP_RESPONSE_RESET_IN_PROGRESS: |
324 | case AP_RESPONSE_BUSY: | |
325 | break; | |
326 | case AP_RESPONSE_Q_NOT_AVAIL: | |
327 | case AP_RESPONSE_DECONFIGURED: | |
328 | case AP_RESPONSE_CHECKSTOPPED: | |
329 | case AP_RESPONSE_INVALID_ADDRESS: | |
6bed05bc | 330 | return -ENODEV; |
b1f933da FB |
331 | case AP_RESPONSE_OTHERWISE_CHANGED: |
332 | break; | |
333 | default: | |
334 | break; | |
335 | } | |
336 | if (i < AP_MAX_RESET - 1) { | |
337 | udelay(5); | |
6bed05bc | 338 | status = __ap_query_functions(qid, functions); |
b1f933da FB |
339 | } |
340 | } | |
6bed05bc | 341 | return -EBUSY; |
6bed05bc HD |
342 | } |
343 | ||
cb17a636 FB |
344 | /** |
345 | * ap_queue_enable_interruption(): Enable interruption on an AP. | |
346 | * @qid: The AP queue number | |
347 | * @ind: the notification indicator byte | |
348 | * | |
349 | * Enables interruption on AP queue via ap_queue_interruption_control(). Based | |
350 | * on the return value it waits a while and tests the AP queue if interrupts | |
351 | * have been switched on using ap_test_queue(). | |
352 | */ | |
353 | static int ap_queue_enable_interruption(ap_qid_t qid, void *ind) | |
354 | { | |
cb17a636 FB |
355 | struct ap_queue_status status; |
356 | int t_depth, t_device_type, rc, i; | |
357 | ||
358 | rc = -EBUSY; | |
359 | status = ap_queue_interruption_control(qid, ind); | |
360 | ||
361 | for (i = 0; i < AP_MAX_RESET; i++) { | |
362 | switch (status.response_code) { | |
363 | case AP_RESPONSE_NORMAL: | |
364 | if (status.int_enabled) | |
365 | return 0; | |
366 | break; | |
367 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
368 | case AP_RESPONSE_BUSY: | |
8738e07d HD |
369 | if (i < AP_MAX_RESET - 1) { |
370 | udelay(5); | |
371 | status = ap_queue_interruption_control(qid, | |
372 | ind); | |
373 | continue; | |
374 | } | |
cb17a636 FB |
375 | break; |
376 | case AP_RESPONSE_Q_NOT_AVAIL: | |
377 | case AP_RESPONSE_DECONFIGURED: | |
378 | case AP_RESPONSE_CHECKSTOPPED: | |
379 | case AP_RESPONSE_INVALID_ADDRESS: | |
380 | return -ENODEV; | |
381 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
382 | if (status.int_enabled) | |
383 | return 0; | |
384 | break; | |
385 | default: | |
386 | break; | |
387 | } | |
388 | if (i < AP_MAX_RESET - 1) { | |
389 | udelay(5); | |
390 | status = ap_test_queue(qid, &t_depth, &t_device_type); | |
391 | } | |
392 | } | |
393 | return rc; | |
cb17a636 FB |
394 | } |
395 | ||
1534c382 | 396 | /** |
1749a81d FB |
397 | * __ap_send(): Send message to adjunct processor queue. |
398 | * @qid: The AP queue number | |
399 | * @psmid: The program supplied message identifier | |
400 | * @msg: The message text | |
401 | * @length: The message length | |
a6a5d73a | 402 | * @special: Special Bit |
1534c382 | 403 | * |
1749a81d | 404 | * Returns AP queue status structure. |
1534c382 | 405 | * Condition code 1 on NQAP can't happen because the L bit is 1. |
1534c382 MS |
406 | * Condition code 2 on NQAP also means the send is incomplete, |
407 | * because a segment boundary was reached. The NQAP is repeated. | |
408 | */ | |
409 | static inline struct ap_queue_status | |
a6a5d73a FB |
410 | __ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length, |
411 | unsigned int special) | |
1534c382 MS |
412 | { |
413 | typedef struct { char _[length]; } msgblock; | |
414 | register unsigned long reg0 asm ("0") = qid | 0x40000000UL; | |
415 | register struct ap_queue_status reg1 asm ("1"); | |
416 | register unsigned long reg2 asm ("2") = (unsigned long) msg; | |
417 | register unsigned long reg3 asm ("3") = (unsigned long) length; | |
418 | register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32); | |
7d6c3b49 | 419 | register unsigned long reg5 asm ("5") = psmid & 0xffffffff; |
1534c382 | 420 | |
a6a5d73a FB |
421 | if (special == 1) |
422 | reg0 |= 0x400000UL; | |
423 | ||
1534c382 | 424 | asm volatile ( |
a7475afd | 425 | "0: .long 0xb2ad0042\n" /* NQAP */ |
1534c382 MS |
426 | " brc 2,0b" |
427 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) | |
428 | : "d" (reg4), "d" (reg5), "m" (*(msgblock *) msg) | |
429 | : "cc" ); | |
430 | return reg1; | |
431 | } | |
432 | ||
433 | int ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) | |
434 | { | |
435 | struct ap_queue_status status; | |
436 | ||
a6a5d73a | 437 | status = __ap_send(qid, psmid, msg, length, 0); |
1534c382 MS |
438 | switch (status.response_code) { |
439 | case AP_RESPONSE_NORMAL: | |
440 | return 0; | |
441 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 442 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 | 443 | return -EBUSY; |
a6a5d73a FB |
444 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
445 | return -EINVAL; | |
1534c382 MS |
446 | default: /* Device is gone. */ |
447 | return -ENODEV; | |
448 | } | |
449 | } | |
450 | EXPORT_SYMBOL(ap_send); | |
451 | ||
1749a81d FB |
452 | /** |
453 | * __ap_recv(): Receive message from adjunct processor queue. | |
454 | * @qid: The AP queue number | |
455 | * @psmid: Pointer to program supplied message identifier | |
456 | * @msg: The message text | |
457 | * @length: The message length | |
1534c382 | 458 | * |
1749a81d | 459 | * Returns AP queue status structure. |
1534c382 MS |
460 | * Condition code 1 on DQAP means the receive has taken place |
461 | * but only partially. The response is incomplete, hence the | |
462 | * DQAP is repeated. | |
1534c382 MS |
463 | * Condition code 2 on DQAP also means the receive is incomplete, |
464 | * this time because a segment boundary was reached. Again, the | |
465 | * DQAP is repeated. | |
1534c382 MS |
466 | * Note that gpr2 is used by the DQAP instruction to keep track of |
467 | * any 'residual' length, in case the instruction gets interrupted. | |
468 | * Hence it gets zeroed before the instruction. | |
469 | */ | |
470 | static inline struct ap_queue_status | |
471 | __ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
472 | { | |
473 | typedef struct { char _[length]; } msgblock; | |
474 | register unsigned long reg0 asm("0") = qid | 0x80000000UL; | |
475 | register struct ap_queue_status reg1 asm ("1"); | |
476 | register unsigned long reg2 asm("2") = 0UL; | |
477 | register unsigned long reg4 asm("4") = (unsigned long) msg; | |
478 | register unsigned long reg5 asm("5") = (unsigned long) length; | |
479 | register unsigned long reg6 asm("6") = 0UL; | |
480 | register unsigned long reg7 asm("7") = 0UL; | |
481 | ||
482 | ||
483 | asm volatile( | |
a7475afd | 484 | "0: .long 0xb2ae0064\n" /* DQAP */ |
1534c382 MS |
485 | " brc 6,0b\n" |
486 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), | |
487 | "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7), | |
488 | "=m" (*(msgblock *) msg) : : "cc" ); | |
489 | *psmid = (((unsigned long long) reg6) << 32) + reg7; | |
490 | return reg1; | |
491 | } | |
492 | ||
493 | int ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
494 | { | |
495 | struct ap_queue_status status; | |
496 | ||
497 | status = __ap_recv(qid, psmid, msg, length); | |
498 | switch (status.response_code) { | |
499 | case AP_RESPONSE_NORMAL: | |
500 | return 0; | |
501 | case AP_RESPONSE_NO_PENDING_REPLY: | |
502 | if (status.queue_empty) | |
503 | return -ENOENT; | |
504 | return -EBUSY; | |
af512ed0 RW |
505 | case AP_RESPONSE_RESET_IN_PROGRESS: |
506 | return -EBUSY; | |
1534c382 MS |
507 | default: |
508 | return -ENODEV; | |
509 | } | |
510 | } | |
511 | EXPORT_SYMBOL(ap_recv); | |
512 | ||
513 | /** | |
1749a81d FB |
514 | * ap_query_queue(): Check if an AP queue is available. |
515 | * @qid: The AP queue number | |
516 | * @queue_depth: Pointer to queue depth value | |
517 | * @device_type: Pointer to device type value | |
518 | * | |
519 | * The test is repeated for AP_MAX_RESET times. | |
1534c382 MS |
520 | */ |
521 | static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type) | |
522 | { | |
523 | struct ap_queue_status status; | |
524 | int t_depth, t_device_type, rc, i; | |
525 | ||
526 | rc = -EBUSY; | |
527 | for (i = 0; i < AP_MAX_RESET; i++) { | |
528 | status = ap_test_queue(qid, &t_depth, &t_device_type); | |
529 | switch (status.response_code) { | |
530 | case AP_RESPONSE_NORMAL: | |
531 | *queue_depth = t_depth + 1; | |
532 | *device_type = t_device_type; | |
533 | rc = 0; | |
534 | break; | |
535 | case AP_RESPONSE_Q_NOT_AVAIL: | |
536 | rc = -ENODEV; | |
537 | break; | |
538 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
539 | break; | |
540 | case AP_RESPONSE_DECONFIGURED: | |
541 | rc = -ENODEV; | |
542 | break; | |
543 | case AP_RESPONSE_CHECKSTOPPED: | |
544 | rc = -ENODEV; | |
545 | break; | |
cb17a636 FB |
546 | case AP_RESPONSE_INVALID_ADDRESS: |
547 | rc = -ENODEV; | |
548 | break; | |
549 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
550 | break; | |
1534c382 MS |
551 | case AP_RESPONSE_BUSY: |
552 | break; | |
553 | default: | |
554 | BUG(); | |
555 | } | |
556 | if (rc != -EBUSY) | |
557 | break; | |
558 | if (i < AP_MAX_RESET - 1) | |
559 | udelay(5); | |
560 | } | |
561 | return rc; | |
562 | } | |
563 | ||
564 | /** | |
1749a81d FB |
565 | * ap_init_queue(): Reset an AP queue. |
566 | * @qid: The AP queue number | |
567 | * | |
1534c382 | 568 | * Reset an AP queue and wait for it to become available again. |
1534c382 MS |
569 | */ |
570 | static int ap_init_queue(ap_qid_t qid) | |
571 | { | |
572 | struct ap_queue_status status; | |
573 | int rc, dummy, i; | |
574 | ||
575 | rc = -ENODEV; | |
576 | status = ap_reset_queue(qid); | |
577 | for (i = 0; i < AP_MAX_RESET; i++) { | |
578 | switch (status.response_code) { | |
579 | case AP_RESPONSE_NORMAL: | |
580 | if (status.queue_empty) | |
581 | rc = 0; | |
582 | break; | |
583 | case AP_RESPONSE_Q_NOT_AVAIL: | |
584 | case AP_RESPONSE_DECONFIGURED: | |
585 | case AP_RESPONSE_CHECKSTOPPED: | |
586 | i = AP_MAX_RESET; /* return with -ENODEV */ | |
587 | break; | |
588 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
af512ed0 | 589 | rc = -EBUSY; |
1534c382 MS |
590 | case AP_RESPONSE_BUSY: |
591 | default: | |
592 | break; | |
593 | } | |
af512ed0 | 594 | if (rc != -ENODEV && rc != -EBUSY) |
1534c382 MS |
595 | break; |
596 | if (i < AP_MAX_RESET - 1) { | |
91f3e3ea IT |
597 | /* Time we are waiting until we give up (0.7sec * 90). |
598 | * Since the actual request (in progress) will not | |
599 | * interrupted immediately for the reset command, | |
600 | * we have to be patient. In worst case we have to | |
601 | * wait 60sec + reset time (some msec). | |
602 | */ | |
603 | schedule_timeout(AP_RESET_TIMEOUT); | |
1534c382 MS |
604 | status = ap_test_queue(qid, &dummy, &dummy); |
605 | } | |
606 | } | |
cb17a636 | 607 | if (rc == 0 && ap_using_interrupts()) { |
f4eae94f | 608 | rc = ap_queue_enable_interruption(qid, ap_airq.lsi_ptr); |
cb17a636 FB |
609 | /* If interruption mode is supported by the machine, |
610 | * but an AP can not be enabled for interruption then | |
611 | * the AP will be discarded. */ | |
612 | if (rc) | |
613 | pr_err("Registering adapter interrupts for " | |
614 | "AP %d failed\n", AP_QID_DEVICE(qid)); | |
615 | } | |
1534c382 MS |
616 | return rc; |
617 | } | |
618 | ||
af512ed0 | 619 | /** |
1749a81d FB |
620 | * ap_increase_queue_count(): Arm request timeout. |
621 | * @ap_dev: Pointer to an AP device. | |
622 | * | |
623 | * Arm request timeout if an AP device was idle and a new request is submitted. | |
af512ed0 RW |
624 | */ |
625 | static void ap_increase_queue_count(struct ap_device *ap_dev) | |
626 | { | |
627 | int timeout = ap_dev->drv->request_timeout; | |
628 | ||
629 | ap_dev->queue_count++; | |
630 | if (ap_dev->queue_count == 1) { | |
631 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
632 | ap_dev->reset = AP_RESET_ARMED; | |
633 | } | |
634 | } | |
635 | ||
636 | /** | |
1749a81d FB |
637 | * ap_decrease_queue_count(): Decrease queue count. |
638 | * @ap_dev: Pointer to an AP device. | |
639 | * | |
640 | * If AP device is still alive, re-schedule request timeout if there are still | |
af512ed0 RW |
641 | * pending requests. |
642 | */ | |
643 | static void ap_decrease_queue_count(struct ap_device *ap_dev) | |
644 | { | |
645 | int timeout = ap_dev->drv->request_timeout; | |
646 | ||
647 | ap_dev->queue_count--; | |
648 | if (ap_dev->queue_count > 0) | |
649 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
650 | else | |
1749a81d | 651 | /* |
af512ed0 RW |
652 | * The timeout timer should to be disabled now - since |
653 | * del_timer_sync() is very expensive, we just tell via the | |
654 | * reset flag to ignore the pending timeout timer. | |
655 | */ | |
656 | ap_dev->reset = AP_RESET_IGNORE; | |
657 | } | |
658 | ||
1749a81d | 659 | /* |
1534c382 MS |
660 | * AP device related attributes. |
661 | */ | |
662 | static ssize_t ap_hwtype_show(struct device *dev, | |
663 | struct device_attribute *attr, char *buf) | |
664 | { | |
665 | struct ap_device *ap_dev = to_ap_dev(dev); | |
666 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->device_type); | |
667 | } | |
1534c382 | 668 | |
43c207e6 | 669 | static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL); |
42f4dd61 IT |
670 | |
671 | static ssize_t ap_raw_hwtype_show(struct device *dev, | |
672 | struct device_attribute *attr, char *buf) | |
673 | { | |
674 | struct ap_device *ap_dev = to_ap_dev(dev); | |
675 | ||
676 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->raw_hwtype); | |
677 | } | |
678 | ||
679 | static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL); | |
680 | ||
1534c382 MS |
681 | static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr, |
682 | char *buf) | |
683 | { | |
684 | struct ap_device *ap_dev = to_ap_dev(dev); | |
685 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->queue_depth); | |
686 | } | |
1534c382 | 687 | |
43c207e6 | 688 | static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL); |
1534c382 MS |
689 | static ssize_t ap_request_count_show(struct device *dev, |
690 | struct device_attribute *attr, | |
691 | 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->total_request_count); | |
698 | spin_unlock_bh(&ap_dev->lock); | |
699 | return rc; | |
700 | } | |
701 | ||
702 | static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL); | |
703 | ||
b26bd941 HD |
704 | static ssize_t ap_requestq_count_show(struct device *dev, |
705 | struct device_attribute *attr, char *buf) | |
706 | { | |
707 | struct ap_device *ap_dev = to_ap_dev(dev); | |
708 | int rc; | |
709 | ||
710 | spin_lock_bh(&ap_dev->lock); | |
711 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->requestq_count); | |
712 | spin_unlock_bh(&ap_dev->lock); | |
713 | return rc; | |
714 | } | |
715 | ||
716 | static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL); | |
717 | ||
718 | static ssize_t ap_pendingq_count_show(struct device *dev, | |
719 | struct device_attribute *attr, char *buf) | |
720 | { | |
721 | struct ap_device *ap_dev = to_ap_dev(dev); | |
722 | int rc; | |
723 | ||
724 | spin_lock_bh(&ap_dev->lock); | |
725 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->pendingq_count); | |
726 | spin_unlock_bh(&ap_dev->lock); | |
727 | return rc; | |
728 | } | |
729 | ||
730 | static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL); | |
731 | ||
1534c382 MS |
732 | static ssize_t ap_modalias_show(struct device *dev, |
733 | struct device_attribute *attr, char *buf) | |
734 | { | |
735 | return sprintf(buf, "ap:t%02X", to_ap_dev(dev)->device_type); | |
736 | } | |
737 | ||
738 | static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL); | |
739 | ||
b26bd941 HD |
740 | static ssize_t ap_functions_show(struct device *dev, |
741 | struct device_attribute *attr, char *buf) | |
742 | { | |
743 | struct ap_device *ap_dev = to_ap_dev(dev); | |
744 | return snprintf(buf, PAGE_SIZE, "0x%08X\n", ap_dev->functions); | |
745 | } | |
746 | ||
747 | static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL); | |
748 | ||
1534c382 MS |
749 | static struct attribute *ap_dev_attrs[] = { |
750 | &dev_attr_hwtype.attr, | |
42f4dd61 | 751 | &dev_attr_raw_hwtype.attr, |
1534c382 MS |
752 | &dev_attr_depth.attr, |
753 | &dev_attr_request_count.attr, | |
b26bd941 HD |
754 | &dev_attr_requestq_count.attr, |
755 | &dev_attr_pendingq_count.attr, | |
1534c382 | 756 | &dev_attr_modalias.attr, |
b26bd941 | 757 | &dev_attr_ap_functions.attr, |
1534c382 MS |
758 | NULL |
759 | }; | |
760 | static struct attribute_group ap_dev_attr_group = { | |
761 | .attrs = ap_dev_attrs | |
762 | }; | |
763 | ||
764 | /** | |
1749a81d FB |
765 | * ap_bus_match() |
766 | * @dev: Pointer to device | |
767 | * @drv: Pointer to device_driver | |
768 | * | |
1534c382 MS |
769 | * AP bus driver registration/unregistration. |
770 | */ | |
771 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
772 | { | |
773 | struct ap_device *ap_dev = to_ap_dev(dev); | |
774 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
775 | struct ap_device_id *id; | |
776 | ||
1749a81d | 777 | /* |
1534c382 MS |
778 | * Compare device type of the device with the list of |
779 | * supported types of the device_driver. | |
780 | */ | |
781 | for (id = ap_drv->ids; id->match_flags; id++) { | |
782 | if ((id->match_flags & AP_DEVICE_ID_MATCH_DEVICE_TYPE) && | |
783 | (id->dev_type != ap_dev->device_type)) | |
784 | continue; | |
785 | return 1; | |
786 | } | |
787 | return 0; | |
788 | } | |
789 | ||
790 | /** | |
1749a81d FB |
791 | * ap_uevent(): Uevent function for AP devices. |
792 | * @dev: Pointer to device | |
793 | * @env: Pointer to kobj_uevent_env | |
794 | * | |
795 | * It sets up a single environment variable DEV_TYPE which contains the | |
796 | * hardware device type. | |
1534c382 | 797 | */ |
7eff2e7a | 798 | static int ap_uevent (struct device *dev, struct kobj_uevent_env *env) |
1534c382 MS |
799 | { |
800 | struct ap_device *ap_dev = to_ap_dev(dev); | |
7eff2e7a | 801 | int retval = 0; |
1534c382 MS |
802 | |
803 | if (!ap_dev) | |
804 | return -ENODEV; | |
805 | ||
806 | /* Set up DEV_TYPE environment variable. */ | |
7eff2e7a | 807 | retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); |
bf62456e ER |
808 | if (retval) |
809 | return retval; | |
810 | ||
66a4263b | 811 | /* Add MODALIAS= */ |
7eff2e7a | 812 | retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); |
bf62456e | 813 | |
bf62456e | 814 | return retval; |
1534c382 MS |
815 | } |
816 | ||
772f5472 FB |
817 | static int ap_bus_suspend(struct device *dev, pm_message_t state) |
818 | { | |
819 | struct ap_device *ap_dev = to_ap_dev(dev); | |
820 | unsigned long flags; | |
821 | ||
822 | if (!ap_suspend_flag) { | |
823 | ap_suspend_flag = 1; | |
824 | ||
825 | /* Disable scanning for devices, thus we do not want to scan | |
826 | * for them after removing. | |
827 | */ | |
828 | del_timer_sync(&ap_config_timer); | |
829 | if (ap_work_queue != NULL) { | |
830 | destroy_workqueue(ap_work_queue); | |
831 | ap_work_queue = NULL; | |
832 | } | |
5314af69 | 833 | |
772f5472 FB |
834 | tasklet_disable(&ap_tasklet); |
835 | } | |
836 | /* Poll on the device until all requests are finished. */ | |
837 | do { | |
838 | flags = 0; | |
95f1556c | 839 | spin_lock_bh(&ap_dev->lock); |
772f5472 | 840 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 841 | spin_unlock_bh(&ap_dev->lock); |
772f5472 FB |
842 | } while ((flags & 1) || (flags & 2)); |
843 | ||
5314af69 FB |
844 | spin_lock_bh(&ap_dev->lock); |
845 | ap_dev->unregistered = 1; | |
846 | spin_unlock_bh(&ap_dev->lock); | |
847 | ||
772f5472 FB |
848 | return 0; |
849 | } | |
850 | ||
851 | static int ap_bus_resume(struct device *dev) | |
852 | { | |
772f5472 | 853 | struct ap_device *ap_dev = to_ap_dev(dev); |
f4eae94f | 854 | int rc; |
772f5472 FB |
855 | |
856 | if (ap_suspend_flag) { | |
857 | ap_suspend_flag = 0; | |
f4eae94f MS |
858 | if (ap_interrupts_available()) { |
859 | if (!ap_using_interrupts()) { | |
860 | rc = register_adapter_interrupt(&ap_airq); | |
861 | ap_airq_flag = (rc == 0); | |
862 | } | |
863 | } else { | |
864 | if (ap_using_interrupts()) { | |
865 | unregister_adapter_interrupt(&ap_airq); | |
866 | ap_airq_flag = 0; | |
867 | } | |
868 | } | |
75014550 | 869 | ap_query_configuration(); |
5314af69 FB |
870 | if (!user_set_domain) { |
871 | ap_domain_index = -1; | |
872 | ap_select_domain(); | |
873 | } | |
772f5472 FB |
874 | init_timer(&ap_config_timer); |
875 | ap_config_timer.function = ap_config_timeout; | |
876 | ap_config_timer.data = 0; | |
877 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
878 | add_timer(&ap_config_timer); | |
879 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
880 | if (!ap_work_queue) | |
881 | return -ENOMEM; | |
882 | tasklet_enable(&ap_tasklet); | |
883 | if (!ap_using_interrupts()) | |
884 | ap_schedule_poll_timer(); | |
885 | else | |
886 | tasklet_schedule(&ap_tasklet); | |
887 | if (ap_thread_flag) | |
888 | rc = ap_poll_thread_start(); | |
f4eae94f MS |
889 | else |
890 | rc = 0; | |
891 | } else | |
892 | rc = 0; | |
5314af69 FB |
893 | if (AP_QID_QUEUE(ap_dev->qid) != ap_domain_index) { |
894 | spin_lock_bh(&ap_dev->lock); | |
895 | ap_dev->qid = AP_MKQID(AP_QID_DEVICE(ap_dev->qid), | |
896 | ap_domain_index); | |
897 | spin_unlock_bh(&ap_dev->lock); | |
898 | } | |
899 | queue_work(ap_work_queue, &ap_config_work); | |
772f5472 FB |
900 | |
901 | return rc; | |
902 | } | |
903 | ||
1534c382 MS |
904 | static struct bus_type ap_bus_type = { |
905 | .name = "ap", | |
906 | .match = &ap_bus_match, | |
907 | .uevent = &ap_uevent, | |
772f5472 FB |
908 | .suspend = ap_bus_suspend, |
909 | .resume = ap_bus_resume | |
1534c382 MS |
910 | }; |
911 | ||
912 | static int ap_device_probe(struct device *dev) | |
913 | { | |
914 | struct ap_device *ap_dev = to_ap_dev(dev); | |
915 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); | |
916 | int rc; | |
917 | ||
918 | ap_dev->drv = ap_drv; | |
666e68e0 IT |
919 | |
920 | spin_lock_bh(&ap_device_list_lock); | |
921 | list_add(&ap_dev->list, &ap_device_list); | |
922 | spin_unlock_bh(&ap_device_list_lock); | |
923 | ||
1534c382 | 924 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
666e68e0 | 925 | if (rc) { |
43c207e6 | 926 | spin_lock_bh(&ap_device_list_lock); |
666e68e0 | 927 | list_del_init(&ap_dev->list); |
43c207e6 | 928 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca | 929 | } |
1534c382 MS |
930 | return rc; |
931 | } | |
932 | ||
933 | /** | |
1749a81d FB |
934 | * __ap_flush_queue(): Flush requests. |
935 | * @ap_dev: Pointer to the AP device | |
936 | * | |
1534c382 | 937 | * Flush all requests from the request/pending queue of an AP device. |
1534c382 | 938 | */ |
4d284cac | 939 | static void __ap_flush_queue(struct ap_device *ap_dev) |
1534c382 MS |
940 | { |
941 | struct ap_message *ap_msg, *next; | |
942 | ||
943 | list_for_each_entry_safe(ap_msg, next, &ap_dev->pendingq, list) { | |
944 | list_del_init(&ap_msg->list); | |
945 | ap_dev->pendingq_count--; | |
54a8f561 | 946 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
947 | } |
948 | list_for_each_entry_safe(ap_msg, next, &ap_dev->requestq, list) { | |
949 | list_del_init(&ap_msg->list); | |
950 | ap_dev->requestq_count--; | |
54a8f561 | 951 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
952 | } |
953 | } | |
954 | ||
955 | void ap_flush_queue(struct ap_device *ap_dev) | |
956 | { | |
957 | spin_lock_bh(&ap_dev->lock); | |
958 | __ap_flush_queue(ap_dev); | |
959 | spin_unlock_bh(&ap_dev->lock); | |
960 | } | |
961 | EXPORT_SYMBOL(ap_flush_queue); | |
962 | ||
963 | static int ap_device_remove(struct device *dev) | |
964 | { | |
965 | struct ap_device *ap_dev = to_ap_dev(dev); | |
966 | struct ap_driver *ap_drv = ap_dev->drv; | |
967 | ||
4e56296d | 968 | ap_flush_queue(ap_dev); |
af512ed0 | 969 | del_timer_sync(&ap_dev->timeout); |
43c207e6 | 970 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 971 | list_del_init(&ap_dev->list); |
43c207e6 | 972 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca RW |
973 | if (ap_drv->remove) |
974 | ap_drv->remove(ap_dev); | |
e675c0d2 RW |
975 | spin_lock_bh(&ap_dev->lock); |
976 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
977 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
978 | return 0; |
979 | } | |
980 | ||
981 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, | |
982 | char *name) | |
983 | { | |
984 | struct device_driver *drv = &ap_drv->driver; | |
985 | ||
986 | drv->bus = &ap_bus_type; | |
987 | drv->probe = ap_device_probe; | |
988 | drv->remove = ap_device_remove; | |
989 | drv->owner = owner; | |
990 | drv->name = name; | |
991 | return driver_register(drv); | |
992 | } | |
993 | EXPORT_SYMBOL(ap_driver_register); | |
994 | ||
995 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
996 | { | |
997 | driver_unregister(&ap_drv->driver); | |
998 | } | |
999 | EXPORT_SYMBOL(ap_driver_unregister); | |
1000 | ||
dabecb29 HD |
1001 | void ap_bus_force_rescan(void) |
1002 | { | |
56bbe686 IT |
1003 | /* reconfigure the AP bus rescan timer. */ |
1004 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); | |
1005 | /* processing a asynchronous bus rescan */ | |
1006 | queue_work(ap_work_queue, &ap_config_work); | |
1007 | flush_work(&ap_config_work); | |
dabecb29 HD |
1008 | } |
1009 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
1010 | ||
5bc334bf IT |
1011 | /* |
1012 | * ap_test_config(): helper function to extract the nrth bit | |
1013 | * within the unsigned int array field. | |
1014 | */ | |
1015 | static inline int ap_test_config(unsigned int *field, unsigned int nr) | |
1016 | { | |
1017 | if (nr > 0xFFu) | |
1018 | return 0; | |
1019 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
1024 | * @id AP card ID | |
1025 | * | |
1026 | * Returns 0 if the card is not configured | |
1027 | * 1 if the card is configured or | |
1028 | * if the configuration information is not available | |
1029 | */ | |
1030 | static inline int ap_test_config_card_id(unsigned int id) | |
1031 | { | |
1032 | if (!ap_configuration) | |
1033 | return 1; | |
1034 | return ap_test_config(ap_configuration->apm, id); | |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * ap_test_config_domain(): Test, whether an AP usage domain is configured. | |
1039 | * @domain AP usage domain ID | |
1040 | * | |
1041 | * Returns 0 if the usage domain is not configured | |
1042 | * 1 if the usage domain is configured or | |
1043 | * if the configuration information is not available | |
1044 | */ | |
1045 | static inline int ap_test_config_domain(unsigned int domain) | |
1046 | { | |
ea96f788 IT |
1047 | if (!ap_configuration) /* QCI not supported */ |
1048 | if (domain < 16) | |
1049 | return 1; /* then domains 0...15 are configured */ | |
1050 | else | |
1051 | return 0; | |
1052 | else | |
1053 | return ap_test_config(ap_configuration->aqm, domain); | |
5bc334bf IT |
1054 | } |
1055 | ||
1749a81d | 1056 | /* |
1534c382 MS |
1057 | * AP bus attributes. |
1058 | */ | |
1059 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) | |
1060 | { | |
1061 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); | |
1062 | } | |
1063 | ||
1064 | static BUS_ATTR(ap_domain, 0444, ap_domain_show, NULL); | |
1065 | ||
91f3e3ea IT |
1066 | static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf) |
1067 | { | |
1068 | if (ap_configuration != NULL) { /* QCI not supported */ | |
1069 | if (test_facility(76)) { /* format 1 - 256 bit domain field */ | |
1070 | return snprintf(buf, PAGE_SIZE, | |
1071 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
1072 | ap_configuration->adm[0], ap_configuration->adm[1], | |
1073 | ap_configuration->adm[2], ap_configuration->adm[3], | |
1074 | ap_configuration->adm[4], ap_configuration->adm[5], | |
1075 | ap_configuration->adm[6], ap_configuration->adm[7]); | |
1076 | } else { /* format 0 - 16 bit domain field */ | |
1077 | return snprintf(buf, PAGE_SIZE, "%08x%08x\n", | |
1078 | ap_configuration->adm[0], ap_configuration->adm[1]); | |
1079 | } | |
1080 | } else { | |
1081 | return snprintf(buf, PAGE_SIZE, "not supported\n"); | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | static BUS_ATTR(ap_control_domain_mask, 0444, | |
1086 | ap_control_domain_mask_show, NULL); | |
1087 | ||
1534c382 MS |
1088 | static ssize_t ap_config_time_show(struct bus_type *bus, char *buf) |
1089 | { | |
1090 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); | |
1091 | } | |
1092 | ||
cb17a636 FB |
1093 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
1094 | { | |
1095 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
1096 | ap_using_interrupts() ? 1 : 0); | |
1097 | } | |
1098 | ||
1099 | static BUS_ATTR(ap_interrupts, 0444, ap_interrupts_show, NULL); | |
1100 | ||
1534c382 MS |
1101 | static ssize_t ap_config_time_store(struct bus_type *bus, |
1102 | const char *buf, size_t count) | |
1103 | { | |
1104 | int time; | |
1105 | ||
1106 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1107 | return -EINVAL; | |
1108 | ap_config_time = time; | |
1109 | if (!timer_pending(&ap_config_timer) || | |
1110 | !mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ)) { | |
1111 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1112 | add_timer(&ap_config_timer); | |
1113 | } | |
1114 | return count; | |
1115 | } | |
1116 | ||
1117 | static BUS_ATTR(config_time, 0644, ap_config_time_show, ap_config_time_store); | |
1118 | ||
1119 | static ssize_t ap_poll_thread_show(struct bus_type *bus, char *buf) | |
1120 | { | |
1121 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); | |
1122 | } | |
1123 | ||
1124 | static ssize_t ap_poll_thread_store(struct bus_type *bus, | |
1125 | const char *buf, size_t count) | |
1126 | { | |
1127 | int flag, rc; | |
1128 | ||
1129 | if (sscanf(buf, "%d\n", &flag) != 1) | |
1130 | return -EINVAL; | |
1131 | if (flag) { | |
1132 | rc = ap_poll_thread_start(); | |
1133 | if (rc) | |
1134 | return rc; | |
1135 | } | |
1136 | else | |
1137 | ap_poll_thread_stop(); | |
1138 | return count; | |
1139 | } | |
1140 | ||
1141 | static BUS_ATTR(poll_thread, 0644, ap_poll_thread_show, ap_poll_thread_store); | |
1142 | ||
fe137230 FB |
1143 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
1144 | { | |
1145 | return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); | |
1146 | } | |
1147 | ||
1148 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
1149 | size_t count) | |
1150 | { | |
1151 | unsigned long long time; | |
1152 | ktime_t hr_time; | |
1153 | ||
1154 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
1155 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
1156 | time > 120000000000ULL) | |
fe137230 FB |
1157 | return -EINVAL; |
1158 | poll_timeout = time; | |
1159 | hr_time = ktime_set(0, poll_timeout); | |
1160 | ||
8cc2af7c IT |
1161 | spin_lock_bh(&ap_poll_timer_lock); |
1162 | hrtimer_cancel(&ap_poll_timer); | |
1163 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1164 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
1165 | spin_unlock_bh(&ap_poll_timer_lock); | |
1166 | ||
fe137230 FB |
1167 | return count; |
1168 | } | |
1169 | ||
1170 | static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store); | |
1171 | ||
5bc334bf IT |
1172 | static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf) |
1173 | { | |
1174 | ap_qid_t qid; | |
1175 | int i, nd, max_domain_id = -1; | |
1176 | unsigned long fbits; | |
1177 | ||
1178 | if (ap_configuration) { | |
1179 | if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS) { | |
1180 | for (i = 0; i < AP_DEVICES; i++) { | |
1181 | if (!ap_test_config_card_id(i)) | |
1182 | continue; | |
1183 | qid = AP_MKQID(i, ap_domain_index); | |
1184 | fbits = ap_query_facilities(qid); | |
1185 | if (fbits & (1UL << 57)) { | |
1186 | /* the N bit is 0, Nd field is filled */ | |
1187 | nd = (int)((fbits & 0x00FF0000UL)>>16); | |
1188 | if (nd > 0) | |
1189 | max_domain_id = nd; | |
1190 | else | |
1191 | max_domain_id = 15; | |
1192 | } else { | |
1193 | /* N bit is 1, max 16 domains */ | |
1194 | max_domain_id = 15; | |
1195 | } | |
1196 | break; | |
1197 | } | |
1198 | } | |
1199 | } else { | |
1200 | /* no APXA support, older machines with max 16 domains */ | |
1201 | max_domain_id = 15; | |
1202 | } | |
1203 | return snprintf(buf, PAGE_SIZE, "%d\n", max_domain_id); | |
1204 | } | |
1205 | ||
1206 | static BUS_ATTR(ap_max_domain_id, 0444, ap_max_domain_id_show, NULL); | |
1207 | ||
1534c382 MS |
1208 | static struct bus_attribute *const ap_bus_attrs[] = { |
1209 | &bus_attr_ap_domain, | |
91f3e3ea | 1210 | &bus_attr_ap_control_domain_mask, |
1534c382 MS |
1211 | &bus_attr_config_time, |
1212 | &bus_attr_poll_thread, | |
cb17a636 | 1213 | &bus_attr_ap_interrupts, |
fe137230 | 1214 | &bus_attr_poll_timeout, |
5bc334bf | 1215 | &bus_attr_ap_max_domain_id, |
fe137230 | 1216 | NULL, |
1534c382 MS |
1217 | }; |
1218 | ||
75014550 HD |
1219 | /** |
1220 | * ap_query_configuration(): Query AP configuration information. | |
1221 | * | |
1222 | * Query information of installed cards and configured domains from AP. | |
1223 | */ | |
1224 | static void ap_query_configuration(void) | |
1225 | { | |
75014550 HD |
1226 | if (ap_configuration_available()) { |
1227 | if (!ap_configuration) | |
1228 | ap_configuration = | |
1229 | kzalloc(sizeof(struct ap_config_info), | |
1230 | GFP_KERNEL); | |
1231 | if (ap_configuration) | |
1232 | __ap_query_configuration(ap_configuration); | |
1233 | } else | |
1234 | ap_configuration = NULL; | |
75014550 HD |
1235 | } |
1236 | ||
1534c382 | 1237 | /** |
1749a81d FB |
1238 | * ap_select_domain(): Select an AP domain. |
1239 | * | |
1240 | * Pick one of the 16 AP domains. | |
1534c382 | 1241 | */ |
4d284cac | 1242 | static int ap_select_domain(void) |
1534c382 MS |
1243 | { |
1244 | int queue_depth, device_type, count, max_count, best_domain; | |
75014550 | 1245 | ap_qid_t qid; |
1534c382 MS |
1246 | int rc, i, j; |
1247 | ||
170387a8 IT |
1248 | /* IF APXA isn't installed, only 16 domains could be defined */ |
1249 | if (!ap_configuration->ap_extended && (ap_domain_index > 15)) | |
1250 | return -EINVAL; | |
1251 | ||
1749a81d | 1252 | /* |
1534c382 MS |
1253 | * We want to use a single domain. Either the one specified with |
1254 | * the "domain=" parameter or the domain with the maximum number | |
1255 | * of devices. | |
1256 | */ | |
1257 | if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS) | |
1258 | /* Domain has already been selected. */ | |
1259 | return 0; | |
1260 | best_domain = -1; | |
1261 | max_count = 0; | |
1262 | for (i = 0; i < AP_DOMAINS; i++) { | |
75014550 HD |
1263 | if (!ap_test_config_domain(i)) |
1264 | continue; | |
1534c382 MS |
1265 | count = 0; |
1266 | for (j = 0; j < AP_DEVICES; j++) { | |
75014550 HD |
1267 | if (!ap_test_config_card_id(j)) |
1268 | continue; | |
1269 | qid = AP_MKQID(j, i); | |
1534c382 MS |
1270 | rc = ap_query_queue(qid, &queue_depth, &device_type); |
1271 | if (rc) | |
1272 | continue; | |
1273 | count++; | |
1274 | } | |
1275 | if (count > max_count) { | |
1276 | max_count = count; | |
1277 | best_domain = i; | |
1278 | } | |
1279 | } | |
1280 | if (best_domain >= 0){ | |
1281 | ap_domain_index = best_domain; | |
1282 | return 0; | |
1283 | } | |
1284 | return -ENODEV; | |
1285 | } | |
1286 | ||
1287 | /** | |
1749a81d | 1288 | * ap_probe_device_type(): Find the device type of an AP. |
1534c382 | 1289 | * @ap_dev: pointer to the AP device. |
1749a81d FB |
1290 | * |
1291 | * Find the device type if query queue returned a device type of 0. | |
1534c382 MS |
1292 | */ |
1293 | static int ap_probe_device_type(struct ap_device *ap_dev) | |
1294 | { | |
1295 | static unsigned char msg[] = { | |
1296 | 0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00, | |
1297 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1298 | 0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00, | |
1299 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1300 | 0x01,0x00,0x43,0x43,0x41,0x2d,0x41,0x50, | |
1301 | 0x50,0x4c,0x20,0x20,0x20,0x01,0x01,0x01, | |
1302 | 0x00,0x00,0x00,0x00,0x50,0x4b,0x00,0x00, | |
1303 | 0x00,0x00,0x01,0x1c,0x00,0x00,0x00,0x00, | |
1304 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1305 | 0x00,0x00,0x05,0xb8,0x00,0x00,0x00,0x00, | |
1306 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1307 | 0x70,0x00,0x41,0x00,0x00,0x00,0x00,0x00, | |
1308 | 0x00,0x00,0x54,0x32,0x01,0x00,0xa0,0x00, | |
1309 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1310 | 0x00,0x00,0x00,0x00,0xb8,0x05,0x00,0x00, | |
1311 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1312 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1313 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1314 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1315 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1316 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1317 | 0x00,0x00,0x0a,0x00,0x00,0x00,0x00,0x00, | |
1318 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1319 | 0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00, | |
1320 | 0x49,0x43,0x53,0x46,0x20,0x20,0x20,0x20, | |
1321 | 0x50,0x4b,0x0a,0x00,0x50,0x4b,0x43,0x53, | |
1322 | 0x2d,0x31,0x2e,0x32,0x37,0x00,0x11,0x22, | |
1323 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1324 | 0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88, | |
1325 | 0x99,0x00,0x11,0x22,0x33,0x44,0x55,0x66, | |
1326 | 0x77,0x88,0x99,0x00,0x11,0x22,0x33,0x44, | |
1327 | 0x55,0x66,0x77,0x88,0x99,0x00,0x11,0x22, | |
1328 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1329 | 0x11,0x22,0x33,0x5d,0x00,0x5b,0x00,0x77, | |
1330 | 0x88,0x1e,0x00,0x00,0x57,0x00,0x00,0x00, | |
1331 | 0x00,0x04,0x00,0x00,0x4f,0x00,0x00,0x00, | |
1332 | 0x03,0x02,0x00,0x00,0x40,0x01,0x00,0x01, | |
1333 | 0xce,0x02,0x68,0x2d,0x5f,0xa9,0xde,0x0c, | |
1334 | 0xf6,0xd2,0x7b,0x58,0x4b,0xf9,0x28,0x68, | |
1335 | 0x3d,0xb4,0xf4,0xef,0x78,0xd5,0xbe,0x66, | |
1336 | 0x63,0x42,0xef,0xf8,0xfd,0xa4,0xf8,0xb0, | |
1337 | 0x8e,0x29,0xc2,0xc9,0x2e,0xd8,0x45,0xb8, | |
1338 | 0x53,0x8c,0x6f,0x4e,0x72,0x8f,0x6c,0x04, | |
1339 | 0x9c,0x88,0xfc,0x1e,0xc5,0x83,0x55,0x57, | |
1340 | 0xf7,0xdd,0xfd,0x4f,0x11,0x36,0x95,0x5d, | |
1341 | }; | |
1342 | struct ap_queue_status status; | |
1343 | unsigned long long psmid; | |
1344 | char *reply; | |
1345 | int rc, i; | |
1346 | ||
1347 | reply = (void *) get_zeroed_page(GFP_KERNEL); | |
1348 | if (!reply) { | |
1349 | rc = -ENOMEM; | |
1350 | goto out; | |
1351 | } | |
1352 | ||
1353 | status = __ap_send(ap_dev->qid, 0x0102030405060708ULL, | |
a6a5d73a | 1354 | msg, sizeof(msg), 0); |
1534c382 MS |
1355 | if (status.response_code != AP_RESPONSE_NORMAL) { |
1356 | rc = -ENODEV; | |
1357 | goto out_free; | |
1358 | } | |
1359 | ||
1360 | /* Wait for the test message to complete. */ | |
1361 | for (i = 0; i < 6; i++) { | |
1362 | mdelay(300); | |
1363 | status = __ap_recv(ap_dev->qid, &psmid, reply, 4096); | |
1364 | if (status.response_code == AP_RESPONSE_NORMAL && | |
1365 | psmid == 0x0102030405060708ULL) | |
1366 | break; | |
1367 | } | |
1368 | if (i < 6) { | |
1369 | /* Got an answer. */ | |
1370 | if (reply[0] == 0x00 && reply[1] == 0x86) | |
1371 | ap_dev->device_type = AP_DEVICE_TYPE_PCICC; | |
1372 | else | |
1373 | ap_dev->device_type = AP_DEVICE_TYPE_PCICA; | |
1374 | rc = 0; | |
1375 | } else | |
1376 | rc = -ENODEV; | |
1377 | ||
1378 | out_free: | |
1379 | free_page((unsigned long) reply); | |
1380 | out: | |
1381 | return rc; | |
1382 | } | |
1383 | ||
f4eae94f | 1384 | static void ap_interrupt_handler(struct airq_struct *airq) |
cb17a636 | 1385 | { |
420f42ec | 1386 | inc_irq_stat(IRQIO_APB); |
cb17a636 FB |
1387 | tasklet_schedule(&ap_tasklet); |
1388 | } | |
1389 | ||
1534c382 | 1390 | /** |
1749a81d FB |
1391 | * __ap_scan_bus(): Scan the AP bus. |
1392 | * @dev: Pointer to device | |
1393 | * @data: Pointer to data | |
1394 | * | |
1395 | * Scan the AP bus for new devices. | |
1534c382 MS |
1396 | */ |
1397 | static int __ap_scan_bus(struct device *dev, void *data) | |
1398 | { | |
1399 | return to_ap_dev(dev)->qid == (ap_qid_t)(unsigned long) data; | |
1400 | } | |
1401 | ||
1402 | static void ap_device_release(struct device *dev) | |
1403 | { | |
1404 | struct ap_device *ap_dev = to_ap_dev(dev); | |
1405 | ||
1406 | kfree(ap_dev); | |
1407 | } | |
1408 | ||
4927b3f7 | 1409 | static void ap_scan_bus(struct work_struct *unused) |
1534c382 MS |
1410 | { |
1411 | struct ap_device *ap_dev; | |
1412 | struct device *dev; | |
1413 | ap_qid_t qid; | |
1414 | int queue_depth, device_type; | |
6bed05bc | 1415 | unsigned int device_functions; |
1534c382 MS |
1416 | int rc, i; |
1417 | ||
75014550 | 1418 | ap_query_configuration(); |
56bbe686 | 1419 | if (ap_select_domain() != 0) { |
1534c382 | 1420 | return; |
56bbe686 | 1421 | } |
1534c382 MS |
1422 | for (i = 0; i < AP_DEVICES; i++) { |
1423 | qid = AP_MKQID(i, ap_domain_index); | |
1424 | dev = bus_find_device(&ap_bus_type, NULL, | |
1425 | (void *)(unsigned long)qid, | |
1426 | __ap_scan_bus); | |
75014550 HD |
1427 | if (ap_test_config_card_id(i)) |
1428 | rc = ap_query_queue(qid, &queue_depth, &device_type); | |
1429 | else | |
1430 | rc = -ENODEV; | |
c6a48264 | 1431 | if (dev) { |
af512ed0 RW |
1432 | if (rc == -EBUSY) { |
1433 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1434 | schedule_timeout(AP_RESET_TIMEOUT); | |
1435 | rc = ap_query_queue(qid, &queue_depth, | |
1436 | &device_type); | |
1437 | } | |
c6a48264 RW |
1438 | ap_dev = to_ap_dev(dev); |
1439 | spin_lock_bh(&ap_dev->lock); | |
1440 | if (rc || ap_dev->unregistered) { | |
1441 | spin_unlock_bh(&ap_dev->lock); | |
5314af69 FB |
1442 | if (ap_dev->unregistered) |
1443 | i--; | |
c6a48264 | 1444 | device_unregister(dev); |
af512ed0 | 1445 | put_device(dev); |
c6a48264 | 1446 | continue; |
af512ed0 RW |
1447 | } |
1448 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
1449 | put_device(dev); |
1450 | continue; | |
1451 | } | |
1534c382 MS |
1452 | if (rc) |
1453 | continue; | |
1454 | rc = ap_init_queue(qid); | |
1455 | if (rc) | |
1456 | continue; | |
1457 | ap_dev = kzalloc(sizeof(*ap_dev), GFP_KERNEL); | |
1458 | if (!ap_dev) | |
1459 | break; | |
1460 | ap_dev->qid = qid; | |
1461 | ap_dev->queue_depth = queue_depth; | |
4e56296d | 1462 | ap_dev->unregistered = 1; |
1534c382 MS |
1463 | spin_lock_init(&ap_dev->lock); |
1464 | INIT_LIST_HEAD(&ap_dev->pendingq); | |
1465 | INIT_LIST_HEAD(&ap_dev->requestq); | |
cf352ce0 | 1466 | INIT_LIST_HEAD(&ap_dev->list); |
af512ed0 RW |
1467 | setup_timer(&ap_dev->timeout, ap_request_timeout, |
1468 | (unsigned long) ap_dev); | |
6bed05bc HD |
1469 | switch (device_type) { |
1470 | case 0: | |
1e2076f4 | 1471 | /* device type probing for old cards */ |
cf2d007b HD |
1472 | if (ap_probe_device_type(ap_dev)) { |
1473 | kfree(ap_dev); | |
1474 | continue; | |
1475 | } | |
6bed05bc | 1476 | break; |
6bed05bc | 1477 | default: |
1534c382 | 1478 | ap_dev->device_type = device_type; |
6bed05bc | 1479 | } |
42f4dd61 | 1480 | ap_dev->raw_hwtype = device_type; |
1534c382 | 1481 | |
1e2076f4 HD |
1482 | rc = ap_query_functions(qid, &device_functions); |
1483 | if (!rc) | |
1484 | ap_dev->functions = device_functions; | |
1485 | else | |
1486 | ap_dev->functions = 0u; | |
1487 | ||
1534c382 MS |
1488 | ap_dev->device.bus = &ap_bus_type; |
1489 | ap_dev->device.parent = ap_root_device; | |
edc44fa0 FB |
1490 | if (dev_set_name(&ap_dev->device, "card%02x", |
1491 | AP_QID_DEVICE(ap_dev->qid))) { | |
1492 | kfree(ap_dev); | |
1493 | continue; | |
1494 | } | |
1534c382 MS |
1495 | ap_dev->device.release = ap_device_release; |
1496 | rc = device_register(&ap_dev->device); | |
1497 | if (rc) { | |
c6304933 | 1498 | put_device(&ap_dev->device); |
1534c382 MS |
1499 | continue; |
1500 | } | |
1501 | /* Add device attributes. */ | |
1502 | rc = sysfs_create_group(&ap_dev->device.kobj, | |
1503 | &ap_dev_attr_group); | |
4e56296d RW |
1504 | if (!rc) { |
1505 | spin_lock_bh(&ap_dev->lock); | |
1506 | ap_dev->unregistered = 0; | |
1507 | spin_unlock_bh(&ap_dev->lock); | |
1508 | } | |
1509 | else | |
1534c382 MS |
1510 | device_unregister(&ap_dev->device); |
1511 | } | |
1512 | } | |
1513 | ||
1514 | static void | |
1515 | ap_config_timeout(unsigned long ptr) | |
1516 | { | |
1517 | queue_work(ap_work_queue, &ap_config_work); | |
1518 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1519 | add_timer(&ap_config_timer); | |
1520 | } | |
1521 | ||
1522 | /** | |
bc615dea | 1523 | * __ap_schedule_poll_timer(): Schedule poll timer. |
1749a81d | 1524 | * |
1534c382 MS |
1525 | * Set up the timer to run the poll tasklet |
1526 | */ | |
bc615dea | 1527 | static inline void __ap_schedule_poll_timer(void) |
1534c382 | 1528 | { |
8d406c6d | 1529 | ktime_t hr_time; |
93521314 FB |
1530 | |
1531 | spin_lock_bh(&ap_poll_timer_lock); | |
8cc2af7c | 1532 | if (!hrtimer_is_queued(&ap_poll_timer) && !ap_suspend_flag) { |
8d406c6d FB |
1533 | hr_time = ktime_set(0, poll_timeout); |
1534 | hrtimer_forward_now(&ap_poll_timer, hr_time); | |
1535 | hrtimer_restart(&ap_poll_timer); | |
1536 | } | |
93521314 | 1537 | spin_unlock_bh(&ap_poll_timer_lock); |
1534c382 MS |
1538 | } |
1539 | ||
bc615dea HD |
1540 | /** |
1541 | * ap_schedule_poll_timer(): Schedule poll timer. | |
1542 | * | |
1543 | * Set up the timer to run the poll tasklet | |
1544 | */ | |
1545 | static inline void ap_schedule_poll_timer(void) | |
1546 | { | |
1547 | if (ap_using_interrupts()) | |
1548 | return; | |
1549 | __ap_schedule_poll_timer(); | |
1550 | } | |
1551 | ||
1534c382 | 1552 | /** |
1749a81d | 1553 | * ap_poll_read(): Receive pending reply messages from an AP device. |
1534c382 MS |
1554 | * @ap_dev: pointer to the AP device |
1555 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1556 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1557 | * |
1534c382 MS |
1558 | * Returns 0 if the device is still present, -ENODEV if not. |
1559 | */ | |
4d284cac | 1560 | static int ap_poll_read(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1561 | { |
1562 | struct ap_queue_status status; | |
1563 | struct ap_message *ap_msg; | |
1564 | ||
1565 | if (ap_dev->queue_count <= 0) | |
1566 | return 0; | |
1567 | status = __ap_recv(ap_dev->qid, &ap_dev->reply->psmid, | |
1568 | ap_dev->reply->message, ap_dev->reply->length); | |
1569 | switch (status.response_code) { | |
1570 | case AP_RESPONSE_NORMAL: | |
1571 | atomic_dec(&ap_poll_requests); | |
af512ed0 | 1572 | ap_decrease_queue_count(ap_dev); |
1534c382 MS |
1573 | list_for_each_entry(ap_msg, &ap_dev->pendingq, list) { |
1574 | if (ap_msg->psmid != ap_dev->reply->psmid) | |
1575 | continue; | |
1576 | list_del_init(&ap_msg->list); | |
1577 | ap_dev->pendingq_count--; | |
54a8f561 | 1578 | ap_msg->receive(ap_dev, ap_msg, ap_dev->reply); |
1534c382 MS |
1579 | break; |
1580 | } | |
1581 | if (ap_dev->queue_count > 0) | |
1582 | *flags |= 1; | |
1583 | break; | |
1584 | case AP_RESPONSE_NO_PENDING_REPLY: | |
1585 | if (status.queue_empty) { | |
1586 | /* The card shouldn't forget requests but who knows. */ | |
e675c0d2 | 1587 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); |
1534c382 MS |
1588 | ap_dev->queue_count = 0; |
1589 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1590 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1591 | ap_dev->pendingq_count = 0; | |
1592 | } else | |
1593 | *flags |= 2; | |
1594 | break; | |
1595 | default: | |
1596 | return -ENODEV; | |
1597 | } | |
1598 | return 0; | |
1599 | } | |
1600 | ||
1601 | /** | |
1749a81d | 1602 | * ap_poll_write(): Send messages from the request queue to an AP device. |
1534c382 MS |
1603 | * @ap_dev: pointer to the AP device |
1604 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1605 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1606 | * |
1534c382 MS |
1607 | * Returns 0 if the device is still present, -ENODEV if not. |
1608 | */ | |
4d284cac | 1609 | static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1610 | { |
1611 | struct ap_queue_status status; | |
1612 | struct ap_message *ap_msg; | |
1613 | ||
1614 | if (ap_dev->requestq_count <= 0 || | |
1615 | ap_dev->queue_count >= ap_dev->queue_depth) | |
1616 | return 0; | |
1617 | /* Start the next request on the queue. */ | |
1618 | ap_msg = list_entry(ap_dev->requestq.next, struct ap_message, list); | |
1619 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a | 1620 | ap_msg->message, ap_msg->length, ap_msg->special); |
1534c382 MS |
1621 | switch (status.response_code) { |
1622 | case AP_RESPONSE_NORMAL: | |
1623 | atomic_inc(&ap_poll_requests); | |
af512ed0 | 1624 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1625 | list_move_tail(&ap_msg->list, &ap_dev->pendingq); |
1626 | ap_dev->requestq_count--; | |
1627 | ap_dev->pendingq_count++; | |
1628 | if (ap_dev->queue_count < ap_dev->queue_depth && | |
1629 | ap_dev->requestq_count > 0) | |
1630 | *flags |= 1; | |
1631 | *flags |= 2; | |
1632 | break; | |
af512ed0 | 1633 | case AP_RESPONSE_RESET_IN_PROGRESS: |
bc615dea HD |
1634 | __ap_schedule_poll_timer(); |
1635 | case AP_RESPONSE_Q_FULL: | |
1534c382 MS |
1636 | *flags |= 2; |
1637 | break; | |
1638 | case AP_RESPONSE_MESSAGE_TOO_BIG: | |
a6a5d73a | 1639 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 MS |
1640 | return -EINVAL; |
1641 | default: | |
1642 | return -ENODEV; | |
1643 | } | |
1644 | return 0; | |
1645 | } | |
1646 | ||
1647 | /** | |
1749a81d | 1648 | * ap_poll_queue(): Poll AP device for pending replies and send new messages. |
1534c382 MS |
1649 | * @ap_dev: pointer to the bus device |
1650 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1651 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d FB |
1652 | * |
1653 | * Poll AP device for pending replies and send new messages. If either | |
1654 | * ap_poll_read or ap_poll_write returns -ENODEV unregister the device. | |
1534c382 MS |
1655 | * Returns 0. |
1656 | */ | |
1657 | static inline int ap_poll_queue(struct ap_device *ap_dev, unsigned long *flags) | |
1658 | { | |
1659 | int rc; | |
1660 | ||
1661 | rc = ap_poll_read(ap_dev, flags); | |
1662 | if (rc) | |
1663 | return rc; | |
1664 | return ap_poll_write(ap_dev, flags); | |
1665 | } | |
1666 | ||
1667 | /** | |
1749a81d | 1668 | * __ap_queue_message(): Queue a message to a device. |
1534c382 MS |
1669 | * @ap_dev: pointer to the AP device |
1670 | * @ap_msg: the message to be queued | |
1749a81d FB |
1671 | * |
1672 | * Queue a message to a device. Returns 0 if successful. | |
1534c382 MS |
1673 | */ |
1674 | static int __ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1675 | { | |
1676 | struct ap_queue_status status; | |
1677 | ||
1678 | if (list_empty(&ap_dev->requestq) && | |
1679 | ap_dev->queue_count < ap_dev->queue_depth) { | |
1680 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a FB |
1681 | ap_msg->message, ap_msg->length, |
1682 | ap_msg->special); | |
1534c382 MS |
1683 | switch (status.response_code) { |
1684 | case AP_RESPONSE_NORMAL: | |
1685 | list_add_tail(&ap_msg->list, &ap_dev->pendingq); | |
1686 | atomic_inc(&ap_poll_requests); | |
1687 | ap_dev->pendingq_count++; | |
af512ed0 | 1688 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1689 | ap_dev->total_request_count++; |
1690 | break; | |
1691 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 1692 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 MS |
1693 | list_add_tail(&ap_msg->list, &ap_dev->requestq); |
1694 | ap_dev->requestq_count++; | |
1695 | ap_dev->total_request_count++; | |
1696 | return -EBUSY; | |
a6a5d73a | 1697 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 | 1698 | case AP_RESPONSE_MESSAGE_TOO_BIG: |
54a8f561 | 1699 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-EINVAL)); |
1534c382 MS |
1700 | return -EINVAL; |
1701 | default: /* Device is gone. */ | |
54a8f561 | 1702 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
1703 | return -ENODEV; |
1704 | } | |
1705 | } else { | |
1706 | list_add_tail(&ap_msg->list, &ap_dev->requestq); | |
1707 | ap_dev->requestq_count++; | |
1708 | ap_dev->total_request_count++; | |
1709 | return -EBUSY; | |
1710 | } | |
1711 | ap_schedule_poll_timer(); | |
1712 | return 0; | |
1713 | } | |
1714 | ||
1715 | void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1716 | { | |
1717 | unsigned long flags; | |
1718 | int rc; | |
1719 | ||
54a8f561 HD |
1720 | /* For asynchronous message handling a valid receive-callback |
1721 | * is required. */ | |
1722 | BUG_ON(!ap_msg->receive); | |
1723 | ||
1534c382 MS |
1724 | spin_lock_bh(&ap_dev->lock); |
1725 | if (!ap_dev->unregistered) { | |
1726 | /* Make room on the queue by polling for finished requests. */ | |
1727 | rc = ap_poll_queue(ap_dev, &flags); | |
1728 | if (!rc) | |
1729 | rc = __ap_queue_message(ap_dev, ap_msg); | |
1730 | if (!rc) | |
1731 | wake_up(&ap_poll_wait); | |
4e56296d RW |
1732 | if (rc == -ENODEV) |
1733 | ap_dev->unregistered = 1; | |
1534c382 | 1734 | } else { |
54a8f561 | 1735 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
c6a48264 | 1736 | rc = -ENODEV; |
1534c382 MS |
1737 | } |
1738 | spin_unlock_bh(&ap_dev->lock); | |
1739 | if (rc == -ENODEV) | |
1740 | device_unregister(&ap_dev->device); | |
1741 | } | |
1742 | EXPORT_SYMBOL(ap_queue_message); | |
1743 | ||
1744 | /** | |
1749a81d FB |
1745 | * ap_cancel_message(): Cancel a crypto request. |
1746 | * @ap_dev: The AP device that has the message queued | |
1747 | * @ap_msg: The message that is to be removed | |
1748 | * | |
1534c382 | 1749 | * Cancel a crypto request. This is done by removing the request |
1749a81d | 1750 | * from the device pending or request queue. Note that the |
1534c382 MS |
1751 | * request stays on the AP queue. When it finishes the message |
1752 | * reply will be discarded because the psmid can't be found. | |
1534c382 MS |
1753 | */ |
1754 | void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1755 | { | |
1756 | struct ap_message *tmp; | |
1757 | ||
1758 | spin_lock_bh(&ap_dev->lock); | |
1759 | if (!list_empty(&ap_msg->list)) { | |
1760 | list_for_each_entry(tmp, &ap_dev->pendingq, list) | |
1761 | if (tmp->psmid == ap_msg->psmid) { | |
1762 | ap_dev->pendingq_count--; | |
1763 | goto found; | |
1764 | } | |
1765 | ap_dev->requestq_count--; | |
1766 | found: | |
1767 | list_del_init(&ap_msg->list); | |
1768 | } | |
1769 | spin_unlock_bh(&ap_dev->lock); | |
1770 | } | |
1771 | EXPORT_SYMBOL(ap_cancel_message); | |
1772 | ||
1773 | /** | |
1749a81d | 1774 | * ap_poll_timeout(): AP receive polling for finished AP requests. |
fe137230 | 1775 | * @unused: Unused pointer. |
1749a81d | 1776 | * |
fe137230 | 1777 | * Schedules the AP tasklet using a high resolution timer. |
1534c382 | 1778 | */ |
fe137230 | 1779 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) |
1534c382 MS |
1780 | { |
1781 | tasklet_schedule(&ap_tasklet); | |
fe137230 | 1782 | return HRTIMER_NORESTART; |
1534c382 MS |
1783 | } |
1784 | ||
af512ed0 | 1785 | /** |
1749a81d FB |
1786 | * ap_reset(): Reset a not responding AP device. |
1787 | * @ap_dev: Pointer to the AP device | |
1788 | * | |
af512ed0 RW |
1789 | * Reset a not responding AP device and move all requests from the |
1790 | * pending queue to the request queue. | |
1791 | */ | |
1792 | static void ap_reset(struct ap_device *ap_dev) | |
1793 | { | |
1794 | int rc; | |
1795 | ||
1796 | ap_dev->reset = AP_RESET_IGNORE; | |
1797 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
1798 | ap_dev->queue_count = 0; | |
1799 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1800 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1801 | ap_dev->pendingq_count = 0; | |
1802 | rc = ap_init_queue(ap_dev->qid); | |
1803 | if (rc == -ENODEV) | |
1804 | ap_dev->unregistered = 1; | |
75464960 HD |
1805 | else |
1806 | __ap_schedule_poll_timer(); | |
af512ed0 RW |
1807 | } |
1808 | ||
43c207e6 | 1809 | static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 | 1810 | { |
1534c382 | 1811 | if (!ap_dev->unregistered) { |
c6a48264 | 1812 | if (ap_poll_queue(ap_dev, flags)) |
4e56296d | 1813 | ap_dev->unregistered = 1; |
af512ed0 RW |
1814 | if (ap_dev->reset == AP_RESET_DO) |
1815 | ap_reset(ap_dev); | |
c6a48264 | 1816 | } |
1534c382 MS |
1817 | return 0; |
1818 | } | |
1819 | ||
1749a81d FB |
1820 | /** |
1821 | * ap_poll_all(): Poll all AP devices. | |
1822 | * @dummy: Unused variable | |
1823 | * | |
1824 | * Poll all AP devices on the bus in a round robin fashion. Continue | |
1825 | * polling until bit 2^0 of the control flags is not set. If bit 2^1 | |
1826 | * of the control flags has been set arm the poll timer. | |
1827 | */ | |
1534c382 MS |
1828 | static void ap_poll_all(unsigned long dummy) |
1829 | { | |
1830 | unsigned long flags; | |
cf352ce0 | 1831 | struct ap_device *ap_dev; |
1534c382 | 1832 | |
cb17a636 FB |
1833 | /* Reset the indicator if interrupts are used. Thus new interrupts can |
1834 | * be received. Doing it in the beginning of the tasklet is therefor | |
1835 | * important that no requests on any AP get lost. | |
1836 | */ | |
1837 | if (ap_using_interrupts()) | |
f4eae94f | 1838 | xchg(ap_airq.lsi_ptr, 0); |
1534c382 MS |
1839 | do { |
1840 | flags = 0; | |
43c207e6 | 1841 | spin_lock(&ap_device_list_lock); |
cf352ce0 | 1842 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1843 | spin_lock(&ap_dev->lock); |
43c207e6 | 1844 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1845 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1846 | } |
43c207e6 | 1847 | spin_unlock(&ap_device_list_lock); |
1534c382 MS |
1848 | } while (flags & 1); |
1849 | if (flags & 2) | |
1850 | ap_schedule_poll_timer(); | |
1851 | } | |
1852 | ||
1853 | /** | |
1749a81d FB |
1854 | * ap_poll_thread(): Thread that polls for finished requests. |
1855 | * @data: Unused pointer | |
1856 | * | |
1534c382 MS |
1857 | * AP bus poll thread. The purpose of this thread is to poll for |
1858 | * finished requests in a loop if there is a "free" cpu - that is | |
1859 | * a cpu that doesn't have anything better to do. The polling stops | |
1860 | * as soon as there is another task or if all messages have been | |
1861 | * delivered. | |
1862 | */ | |
1863 | static int ap_poll_thread(void *data) | |
1864 | { | |
1865 | DECLARE_WAITQUEUE(wait, current); | |
1866 | unsigned long flags; | |
1867 | int requests; | |
cf352ce0 | 1868 | struct ap_device *ap_dev; |
1534c382 | 1869 | |
8698a745 | 1870 | set_user_nice(current, MAX_NICE); |
1534c382 | 1871 | while (1) { |
772f5472 FB |
1872 | if (ap_suspend_flag) |
1873 | return 0; | |
1534c382 MS |
1874 | if (need_resched()) { |
1875 | schedule(); | |
1876 | continue; | |
1877 | } | |
1878 | add_wait_queue(&ap_poll_wait, &wait); | |
1879 | set_current_state(TASK_INTERRUPTIBLE); | |
1880 | if (kthread_should_stop()) | |
1881 | break; | |
1882 | requests = atomic_read(&ap_poll_requests); | |
1883 | if (requests <= 0) | |
1884 | schedule(); | |
1885 | set_current_state(TASK_RUNNING); | |
1886 | remove_wait_queue(&ap_poll_wait, &wait); | |
1887 | ||
1534c382 | 1888 | flags = 0; |
43c207e6 | 1889 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 1890 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1891 | spin_lock(&ap_dev->lock); |
43c207e6 | 1892 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1893 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1894 | } |
43c207e6 | 1895 | spin_unlock_bh(&ap_device_list_lock); |
1534c382 MS |
1896 | } |
1897 | set_current_state(TASK_RUNNING); | |
1898 | remove_wait_queue(&ap_poll_wait, &wait); | |
1899 | return 0; | |
1900 | } | |
1901 | ||
1902 | static int ap_poll_thread_start(void) | |
1903 | { | |
1904 | int rc; | |
1905 | ||
772f5472 | 1906 | if (ap_using_interrupts() || ap_suspend_flag) |
cb17a636 | 1907 | return 0; |
1534c382 MS |
1908 | mutex_lock(&ap_poll_thread_mutex); |
1909 | if (!ap_poll_kthread) { | |
1910 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
ba8da213 | 1911 | rc = PTR_RET(ap_poll_kthread); |
1534c382 MS |
1912 | if (rc) |
1913 | ap_poll_kthread = NULL; | |
1914 | } | |
1915 | else | |
1916 | rc = 0; | |
1917 | mutex_unlock(&ap_poll_thread_mutex); | |
1918 | return rc; | |
1919 | } | |
1920 | ||
1921 | static void ap_poll_thread_stop(void) | |
1922 | { | |
1923 | mutex_lock(&ap_poll_thread_mutex); | |
1924 | if (ap_poll_kthread) { | |
1925 | kthread_stop(ap_poll_kthread); | |
1926 | ap_poll_kthread = NULL; | |
1927 | } | |
1928 | mutex_unlock(&ap_poll_thread_mutex); | |
1929 | } | |
1930 | ||
af512ed0 | 1931 | /** |
1749a81d FB |
1932 | * ap_request_timeout(): Handling of request timeouts |
1933 | * @data: Holds the AP device. | |
1934 | * | |
1935 | * Handles request timeouts. | |
af512ed0 RW |
1936 | */ |
1937 | static void ap_request_timeout(unsigned long data) | |
1938 | { | |
1939 | struct ap_device *ap_dev = (struct ap_device *) data; | |
1940 | ||
cb17a636 | 1941 | if (ap_dev->reset == AP_RESET_ARMED) { |
af512ed0 | 1942 | ap_dev->reset = AP_RESET_DO; |
cb17a636 FB |
1943 | |
1944 | if (ap_using_interrupts()) | |
1945 | tasklet_schedule(&ap_tasklet); | |
1946 | } | |
af512ed0 RW |
1947 | } |
1948 | ||
13e742ba RW |
1949 | static void ap_reset_domain(void) |
1950 | { | |
1951 | int i; | |
1952 | ||
f60b8d44 | 1953 | if ((ap_domain_index != -1) && (ap_test_config_domain(ap_domain_index))) |
39aa7cf6 RW |
1954 | for (i = 0; i < AP_DEVICES; i++) |
1955 | ap_reset_queue(AP_MKQID(i, ap_domain_index)); | |
13e742ba RW |
1956 | } |
1957 | ||
1958 | static void ap_reset_all(void) | |
85eca850 RW |
1959 | { |
1960 | int i, j; | |
1961 | ||
170387a8 IT |
1962 | for (i = 0; i < AP_DOMAINS; i++) { |
1963 | if (!ap_test_config_domain(i)) | |
1964 | continue; | |
1965 | for (j = 0; j < AP_DEVICES; j++) { | |
1966 | if (!ap_test_config_card_id(j)) | |
1967 | continue; | |
85eca850 | 1968 | ap_reset_queue(AP_MKQID(j, i)); |
170387a8 IT |
1969 | } |
1970 | } | |
85eca850 RW |
1971 | } |
1972 | ||
1973 | static struct reset_call ap_reset_call = { | |
13e742ba | 1974 | .fn = ap_reset_all, |
85eca850 RW |
1975 | }; |
1976 | ||
1534c382 | 1977 | /** |
1749a81d FB |
1978 | * ap_module_init(): The module initialization code. |
1979 | * | |
1980 | * Initializes the module. | |
1534c382 MS |
1981 | */ |
1982 | int __init ap_module_init(void) | |
1983 | { | |
1984 | int rc, i; | |
1985 | ||
1986 | if (ap_domain_index < -1 || ap_domain_index >= AP_DOMAINS) { | |
136f7a1c MS |
1987 | pr_warning("%d is not a valid cryptographic domain\n", |
1988 | ap_domain_index); | |
1534c382 MS |
1989 | return -EINVAL; |
1990 | } | |
5314af69 FB |
1991 | /* In resume callback we need to know if the user had set the domain. |
1992 | * If so, we can not just reset it. | |
1993 | */ | |
1994 | if (ap_domain_index >= 0) | |
1995 | user_set_domain = 1; | |
1996 | ||
1534c382 | 1997 | if (ap_instructions_available() != 0) { |
136f7a1c MS |
1998 | pr_warning("The hardware system does not support " |
1999 | "AP instructions\n"); | |
1534c382 MS |
2000 | return -ENODEV; |
2001 | } | |
cb17a636 | 2002 | if (ap_interrupts_available()) { |
f4eae94f MS |
2003 | rc = register_adapter_interrupt(&ap_airq); |
2004 | ap_airq_flag = (rc == 0); | |
cb17a636 FB |
2005 | } |
2006 | ||
85eca850 | 2007 | register_reset_call(&ap_reset_call); |
1534c382 MS |
2008 | |
2009 | /* Create /sys/bus/ap. */ | |
2010 | rc = bus_register(&ap_bus_type); | |
2011 | if (rc) | |
2012 | goto out; | |
2013 | for (i = 0; ap_bus_attrs[i]; i++) { | |
2014 | rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]); | |
2015 | if (rc) | |
2016 | goto out_bus; | |
2017 | } | |
2018 | ||
2019 | /* Create /sys/devices/ap. */ | |
035da16f | 2020 | ap_root_device = root_device_register("ap"); |
ba8da213 | 2021 | rc = PTR_RET(ap_root_device); |
1534c382 MS |
2022 | if (rc) |
2023 | goto out_bus; | |
2024 | ||
2025 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
2026 | if (!ap_work_queue) { | |
2027 | rc = -ENOMEM; | |
2028 | goto out_root; | |
2029 | } | |
2030 | ||
75014550 | 2031 | ap_query_configuration(); |
1534c382 MS |
2032 | if (ap_select_domain() == 0) |
2033 | ap_scan_bus(NULL); | |
2034 | ||
1749a81d | 2035 | /* Setup the AP bus rescan timer. */ |
1534c382 MS |
2036 | init_timer(&ap_config_timer); |
2037 | ap_config_timer.function = ap_config_timeout; | |
2038 | ap_config_timer.data = 0; | |
2039 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
2040 | add_timer(&ap_config_timer); | |
2041 | ||
fe137230 FB |
2042 | /* Setup the high resultion poll timer. |
2043 | * If we are running under z/VM adjust polling to z/VM polling rate. | |
2044 | */ | |
2045 | if (MACHINE_IS_VM) | |
2046 | poll_timeout = 1500000; | |
93521314 | 2047 | spin_lock_init(&ap_poll_timer_lock); |
fe137230 FB |
2048 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
2049 | ap_poll_timer.function = ap_poll_timeout; | |
2050 | ||
1534c382 MS |
2051 | /* Start the low priority AP bus poll thread. */ |
2052 | if (ap_thread_flag) { | |
2053 | rc = ap_poll_thread_start(); | |
2054 | if (rc) | |
2055 | goto out_work; | |
2056 | } | |
2057 | ||
2058 | return 0; | |
2059 | ||
2060 | out_work: | |
2061 | del_timer_sync(&ap_config_timer); | |
fe137230 | 2062 | hrtimer_cancel(&ap_poll_timer); |
1534c382 MS |
2063 | destroy_workqueue(ap_work_queue); |
2064 | out_root: | |
035da16f | 2065 | root_device_unregister(ap_root_device); |
1534c382 MS |
2066 | out_bus: |
2067 | while (i--) | |
2068 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
2069 | bus_unregister(&ap_bus_type); | |
2070 | out: | |
85eca850 | 2071 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
2072 | if (ap_using_interrupts()) |
2073 | unregister_adapter_interrupt(&ap_airq); | |
1534c382 MS |
2074 | return rc; |
2075 | } | |
2076 | ||
2077 | static int __ap_match_all(struct device *dev, void *data) | |
2078 | { | |
2079 | return 1; | |
2080 | } | |
2081 | ||
2082 | /** | |
1749a81d FB |
2083 | * ap_modules_exit(): The module termination code |
2084 | * | |
2085 | * Terminates the module. | |
1534c382 MS |
2086 | */ |
2087 | void ap_module_exit(void) | |
2088 | { | |
2089 | int i; | |
2090 | struct device *dev; | |
2091 | ||
13e742ba | 2092 | ap_reset_domain(); |
1534c382 MS |
2093 | ap_poll_thread_stop(); |
2094 | del_timer_sync(&ap_config_timer); | |
fe137230 | 2095 | hrtimer_cancel(&ap_poll_timer); |
1534c382 | 2096 | destroy_workqueue(ap_work_queue); |
13e742ba | 2097 | tasklet_kill(&ap_tasklet); |
1534c382 MS |
2098 | while ((dev = bus_find_device(&ap_bus_type, NULL, NULL, |
2099 | __ap_match_all))) | |
2100 | { | |
2101 | device_unregister(dev); | |
2102 | put_device(dev); | |
2103 | } | |
2104 | for (i = 0; ap_bus_attrs[i]; i++) | |
2105 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
f60b8d44 | 2106 | root_device_unregister(ap_root_device); |
1534c382 | 2107 | bus_unregister(&ap_bus_type); |
85eca850 | 2108 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
2109 | if (ap_using_interrupts()) |
2110 | unregister_adapter_interrupt(&ap_airq); | |
1534c382 MS |
2111 | } |
2112 | ||
1534c382 MS |
2113 | module_init(ap_module_init); |
2114 | module_exit(ap_module_exit); |