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 | { | |
53ec24b1 | 168 | return test_facility(2) && 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 | */ | |
c80773e5 | 177 | #ifdef CONFIG_64BIT |
75014550 HD |
178 | static int ap_configuration_available(void) |
179 | { | |
180 | return test_facility(2) && test_facility(12); | |
181 | } | |
c80773e5 | 182 | #endif |
75014550 | 183 | |
1534c382 | 184 | /** |
1749a81d FB |
185 | * ap_test_queue(): Test adjunct processor queue. |
186 | * @qid: The AP queue number | |
187 | * @queue_depth: Pointer to queue depth value | |
188 | * @device_type: Pointer to device type value | |
1534c382 | 189 | * |
1749a81d | 190 | * Returns AP queue status structure. |
1534c382 MS |
191 | */ |
192 | static inline struct ap_queue_status | |
193 | ap_test_queue(ap_qid_t qid, int *queue_depth, int *device_type) | |
194 | { | |
195 | register unsigned long reg0 asm ("0") = qid; | |
196 | register struct ap_queue_status reg1 asm ("1"); | |
197 | register unsigned long reg2 asm ("2") = 0UL; | |
198 | ||
199 | asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ | |
200 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
201 | *device_type = (int) (reg2 >> 24); | |
202 | *queue_depth = (int) (reg2 & 0xff); | |
203 | return reg1; | |
204 | } | |
205 | ||
206 | /** | |
1749a81d FB |
207 | * ap_reset_queue(): Reset adjunct processor queue. |
208 | * @qid: The AP queue number | |
1534c382 | 209 | * |
1749a81d | 210 | * Returns AP queue status structure. |
1534c382 MS |
211 | */ |
212 | static inline struct ap_queue_status ap_reset_queue(ap_qid_t qid) | |
213 | { | |
214 | register unsigned long reg0 asm ("0") = qid | 0x01000000UL; | |
215 | register struct ap_queue_status reg1 asm ("1"); | |
216 | register unsigned long reg2 asm ("2") = 0UL; | |
217 | ||
218 | asm volatile( | |
219 | ".long 0xb2af0000" /* PQAP(RAPQ) */ | |
220 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
221 | return reg1; | |
222 | } | |
223 | ||
cb17a636 FB |
224 | #ifdef CONFIG_64BIT |
225 | /** | |
226 | * ap_queue_interruption_control(): Enable interruption for a specific AP. | |
227 | * @qid: The AP queue number | |
228 | * @ind: The notification indicator byte | |
229 | * | |
230 | * Returns AP queue status. | |
231 | */ | |
232 | static inline struct ap_queue_status | |
233 | ap_queue_interruption_control(ap_qid_t qid, void *ind) | |
234 | { | |
235 | register unsigned long reg0 asm ("0") = qid | 0x03000000UL; | |
236 | register unsigned long reg1_in asm ("1") = 0x0000800000000000UL | AP_ISC; | |
237 | register struct ap_queue_status reg1_out asm ("1"); | |
238 | register void *reg2 asm ("2") = ind; | |
239 | asm volatile( | |
a7475afd | 240 | ".long 0xb2af0000" /* PQAP(AQIC) */ |
cb17a636 FB |
241 | : "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2) |
242 | : | |
243 | : "cc" ); | |
244 | return reg1_out; | |
245 | } | |
246 | #endif | |
247 | ||
6bed05bc HD |
248 | #ifdef CONFIG_64BIT |
249 | static inline struct ap_queue_status | |
250 | __ap_query_functions(ap_qid_t qid, unsigned int *functions) | |
b1f933da FB |
251 | { |
252 | register unsigned long reg0 asm ("0") = 0UL | qid | (1UL << 23); | |
6bed05bc HD |
253 | register struct ap_queue_status reg1 asm ("1") = AP_QUEUE_STATUS_INVALID; |
254 | register unsigned long reg2 asm ("2"); | |
b1f933da FB |
255 | |
256 | asm volatile( | |
a7475afd | 257 | ".long 0xb2af0000\n" /* PQAP(TAPQ) */ |
6bed05bc HD |
258 | "0:\n" |
259 | EX_TABLE(0b, 0b) | |
260 | : "+d" (reg0), "+d" (reg1), "=d" (reg2) | |
b1f933da FB |
261 | : |
262 | : "cc"); | |
263 | ||
6bed05bc | 264 | *functions = (unsigned int)(reg2 >> 32); |
b1f933da FB |
265 | return reg1; |
266 | } | |
6bed05bc | 267 | #endif |
b1f933da | 268 | |
75014550 HD |
269 | #ifdef CONFIG_64BIT |
270 | static inline int __ap_query_configuration(struct ap_config_info *config) | |
271 | { | |
272 | register unsigned long reg0 asm ("0") = 0x04000000UL; | |
273 | register unsigned long reg1 asm ("1") = -EINVAL; | |
274 | register unsigned char *reg2 asm ("2") = (unsigned char *)config; | |
275 | ||
276 | asm volatile( | |
277 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
278 | "0: la %1,0\n" | |
279 | "1:\n" | |
280 | EX_TABLE(0b, 1b) | |
281 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) | |
282 | : | |
283 | : "cc"); | |
284 | ||
285 | return reg1; | |
286 | } | |
287 | #endif | |
288 | ||
b1f933da | 289 | /** |
6bed05bc | 290 | * ap_query_functions(): Query supported functions. |
b1f933da | 291 | * @qid: The AP queue number |
6bed05bc | 292 | * @functions: Pointer to functions field. |
b1f933da | 293 | * |
6bed05bc HD |
294 | * Returns |
295 | * 0 on success. | |
296 | * -ENODEV if queue not valid. | |
297 | * -EBUSY if device busy. | |
298 | * -EINVAL if query function is not supported | |
b1f933da | 299 | */ |
6bed05bc | 300 | static int ap_query_functions(ap_qid_t qid, unsigned int *functions) |
b1f933da | 301 | { |
6bed05bc | 302 | #ifdef CONFIG_64BIT |
b1f933da | 303 | struct ap_queue_status status; |
6bed05bc HD |
304 | int i; |
305 | status = __ap_query_functions(qid, functions); | |
b1f933da FB |
306 | |
307 | for (i = 0; i < AP_MAX_RESET; i++) { | |
6bed05bc HD |
308 | if (ap_queue_status_invalid_test(&status)) |
309 | return -ENODEV; | |
310 | ||
b1f933da FB |
311 | switch (status.response_code) { |
312 | case AP_RESPONSE_NORMAL: | |
6bed05bc | 313 | return 0; |
b1f933da FB |
314 | case AP_RESPONSE_RESET_IN_PROGRESS: |
315 | case AP_RESPONSE_BUSY: | |
316 | break; | |
317 | case AP_RESPONSE_Q_NOT_AVAIL: | |
318 | case AP_RESPONSE_DECONFIGURED: | |
319 | case AP_RESPONSE_CHECKSTOPPED: | |
320 | case AP_RESPONSE_INVALID_ADDRESS: | |
6bed05bc | 321 | return -ENODEV; |
b1f933da FB |
322 | case AP_RESPONSE_OTHERWISE_CHANGED: |
323 | break; | |
324 | default: | |
325 | break; | |
326 | } | |
327 | if (i < AP_MAX_RESET - 1) { | |
328 | udelay(5); | |
6bed05bc | 329 | status = __ap_query_functions(qid, functions); |
b1f933da FB |
330 | } |
331 | } | |
6bed05bc HD |
332 | return -EBUSY; |
333 | #else | |
334 | return -EINVAL; | |
335 | #endif | |
336 | } | |
337 | ||
cb17a636 FB |
338 | /** |
339 | * ap_queue_enable_interruption(): Enable interruption on an AP. | |
340 | * @qid: The AP queue number | |
341 | * @ind: the notification indicator byte | |
342 | * | |
343 | * Enables interruption on AP queue via ap_queue_interruption_control(). Based | |
344 | * on the return value it waits a while and tests the AP queue if interrupts | |
345 | * have been switched on using ap_test_queue(). | |
346 | */ | |
347 | static int ap_queue_enable_interruption(ap_qid_t qid, void *ind) | |
348 | { | |
349 | #ifdef CONFIG_64BIT | |
350 | struct ap_queue_status status; | |
351 | int t_depth, t_device_type, rc, i; | |
352 | ||
353 | rc = -EBUSY; | |
354 | status = ap_queue_interruption_control(qid, ind); | |
355 | ||
356 | for (i = 0; i < AP_MAX_RESET; i++) { | |
357 | switch (status.response_code) { | |
358 | case AP_RESPONSE_NORMAL: | |
359 | if (status.int_enabled) | |
360 | return 0; | |
361 | break; | |
362 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
363 | case AP_RESPONSE_BUSY: | |
8738e07d HD |
364 | if (i < AP_MAX_RESET - 1) { |
365 | udelay(5); | |
366 | status = ap_queue_interruption_control(qid, | |
367 | ind); | |
368 | continue; | |
369 | } | |
cb17a636 FB |
370 | break; |
371 | case AP_RESPONSE_Q_NOT_AVAIL: | |
372 | case AP_RESPONSE_DECONFIGURED: | |
373 | case AP_RESPONSE_CHECKSTOPPED: | |
374 | case AP_RESPONSE_INVALID_ADDRESS: | |
375 | return -ENODEV; | |
376 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
377 | if (status.int_enabled) | |
378 | return 0; | |
379 | break; | |
380 | default: | |
381 | break; | |
382 | } | |
383 | if (i < AP_MAX_RESET - 1) { | |
384 | udelay(5); | |
385 | status = ap_test_queue(qid, &t_depth, &t_device_type); | |
386 | } | |
387 | } | |
388 | return rc; | |
389 | #else | |
390 | return -EINVAL; | |
391 | #endif | |
392 | } | |
393 | ||
1534c382 | 394 | /** |
1749a81d FB |
395 | * __ap_send(): Send message to adjunct processor queue. |
396 | * @qid: The AP queue number | |
397 | * @psmid: The program supplied message identifier | |
398 | * @msg: The message text | |
399 | * @length: The message length | |
a6a5d73a | 400 | * @special: Special Bit |
1534c382 | 401 | * |
1749a81d | 402 | * Returns AP queue status structure. |
1534c382 | 403 | * Condition code 1 on NQAP can't happen because the L bit is 1. |
1534c382 MS |
404 | * Condition code 2 on NQAP also means the send is incomplete, |
405 | * because a segment boundary was reached. The NQAP is repeated. | |
406 | */ | |
407 | static inline struct ap_queue_status | |
a6a5d73a FB |
408 | __ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length, |
409 | unsigned int special) | |
1534c382 MS |
410 | { |
411 | typedef struct { char _[length]; } msgblock; | |
412 | register unsigned long reg0 asm ("0") = qid | 0x40000000UL; | |
413 | register struct ap_queue_status reg1 asm ("1"); | |
414 | register unsigned long reg2 asm ("2") = (unsigned long) msg; | |
415 | register unsigned long reg3 asm ("3") = (unsigned long) length; | |
416 | register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32); | |
7d6c3b49 | 417 | register unsigned long reg5 asm ("5") = psmid & 0xffffffff; |
1534c382 | 418 | |
a6a5d73a FB |
419 | if (special == 1) |
420 | reg0 |= 0x400000UL; | |
421 | ||
1534c382 | 422 | asm volatile ( |
a7475afd | 423 | "0: .long 0xb2ad0042\n" /* NQAP */ |
1534c382 MS |
424 | " brc 2,0b" |
425 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) | |
426 | : "d" (reg4), "d" (reg5), "m" (*(msgblock *) msg) | |
427 | : "cc" ); | |
428 | return reg1; | |
429 | } | |
430 | ||
431 | int ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) | |
432 | { | |
433 | struct ap_queue_status status; | |
434 | ||
a6a5d73a | 435 | status = __ap_send(qid, psmid, msg, length, 0); |
1534c382 MS |
436 | switch (status.response_code) { |
437 | case AP_RESPONSE_NORMAL: | |
438 | return 0; | |
439 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 440 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 | 441 | return -EBUSY; |
a6a5d73a FB |
442 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
443 | return -EINVAL; | |
1534c382 MS |
444 | default: /* Device is gone. */ |
445 | return -ENODEV; | |
446 | } | |
447 | } | |
448 | EXPORT_SYMBOL(ap_send); | |
449 | ||
1749a81d FB |
450 | /** |
451 | * __ap_recv(): Receive message from adjunct processor queue. | |
452 | * @qid: The AP queue number | |
453 | * @psmid: Pointer to program supplied message identifier | |
454 | * @msg: The message text | |
455 | * @length: The message length | |
1534c382 | 456 | * |
1749a81d | 457 | * Returns AP queue status structure. |
1534c382 MS |
458 | * Condition code 1 on DQAP means the receive has taken place |
459 | * but only partially. The response is incomplete, hence the | |
460 | * DQAP is repeated. | |
1534c382 MS |
461 | * Condition code 2 on DQAP also means the receive is incomplete, |
462 | * this time because a segment boundary was reached. Again, the | |
463 | * DQAP is repeated. | |
1534c382 MS |
464 | * Note that gpr2 is used by the DQAP instruction to keep track of |
465 | * any 'residual' length, in case the instruction gets interrupted. | |
466 | * Hence it gets zeroed before the instruction. | |
467 | */ | |
468 | static inline struct ap_queue_status | |
469 | __ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
470 | { | |
471 | typedef struct { char _[length]; } msgblock; | |
472 | register unsigned long reg0 asm("0") = qid | 0x80000000UL; | |
473 | register struct ap_queue_status reg1 asm ("1"); | |
474 | register unsigned long reg2 asm("2") = 0UL; | |
475 | register unsigned long reg4 asm("4") = (unsigned long) msg; | |
476 | register unsigned long reg5 asm("5") = (unsigned long) length; | |
477 | register unsigned long reg6 asm("6") = 0UL; | |
478 | register unsigned long reg7 asm("7") = 0UL; | |
479 | ||
480 | ||
481 | asm volatile( | |
a7475afd | 482 | "0: .long 0xb2ae0064\n" /* DQAP */ |
1534c382 MS |
483 | " brc 6,0b\n" |
484 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), | |
485 | "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7), | |
486 | "=m" (*(msgblock *) msg) : : "cc" ); | |
487 | *psmid = (((unsigned long long) reg6) << 32) + reg7; | |
488 | return reg1; | |
489 | } | |
490 | ||
491 | int ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
492 | { | |
493 | struct ap_queue_status status; | |
494 | ||
495 | status = __ap_recv(qid, psmid, msg, length); | |
496 | switch (status.response_code) { | |
497 | case AP_RESPONSE_NORMAL: | |
498 | return 0; | |
499 | case AP_RESPONSE_NO_PENDING_REPLY: | |
500 | if (status.queue_empty) | |
501 | return -ENOENT; | |
502 | return -EBUSY; | |
af512ed0 RW |
503 | case AP_RESPONSE_RESET_IN_PROGRESS: |
504 | return -EBUSY; | |
1534c382 MS |
505 | default: |
506 | return -ENODEV; | |
507 | } | |
508 | } | |
509 | EXPORT_SYMBOL(ap_recv); | |
510 | ||
511 | /** | |
1749a81d FB |
512 | * ap_query_queue(): Check if an AP queue is available. |
513 | * @qid: The AP queue number | |
514 | * @queue_depth: Pointer to queue depth value | |
515 | * @device_type: Pointer to device type value | |
516 | * | |
517 | * The test is repeated for AP_MAX_RESET times. | |
1534c382 MS |
518 | */ |
519 | static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type) | |
520 | { | |
521 | struct ap_queue_status status; | |
522 | int t_depth, t_device_type, rc, i; | |
523 | ||
524 | rc = -EBUSY; | |
525 | for (i = 0; i < AP_MAX_RESET; i++) { | |
526 | status = ap_test_queue(qid, &t_depth, &t_device_type); | |
527 | switch (status.response_code) { | |
528 | case AP_RESPONSE_NORMAL: | |
529 | *queue_depth = t_depth + 1; | |
530 | *device_type = t_device_type; | |
531 | rc = 0; | |
532 | break; | |
533 | case AP_RESPONSE_Q_NOT_AVAIL: | |
534 | rc = -ENODEV; | |
535 | break; | |
536 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
537 | break; | |
538 | case AP_RESPONSE_DECONFIGURED: | |
539 | rc = -ENODEV; | |
540 | break; | |
541 | case AP_RESPONSE_CHECKSTOPPED: | |
542 | rc = -ENODEV; | |
543 | break; | |
cb17a636 FB |
544 | case AP_RESPONSE_INVALID_ADDRESS: |
545 | rc = -ENODEV; | |
546 | break; | |
547 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
548 | break; | |
1534c382 MS |
549 | case AP_RESPONSE_BUSY: |
550 | break; | |
551 | default: | |
552 | BUG(); | |
553 | } | |
554 | if (rc != -EBUSY) | |
555 | break; | |
556 | if (i < AP_MAX_RESET - 1) | |
557 | udelay(5); | |
558 | } | |
559 | return rc; | |
560 | } | |
561 | ||
562 | /** | |
1749a81d FB |
563 | * ap_init_queue(): Reset an AP queue. |
564 | * @qid: The AP queue number | |
565 | * | |
1534c382 | 566 | * Reset an AP queue and wait for it to become available again. |
1534c382 MS |
567 | */ |
568 | static int ap_init_queue(ap_qid_t qid) | |
569 | { | |
570 | struct ap_queue_status status; | |
571 | int rc, dummy, i; | |
572 | ||
573 | rc = -ENODEV; | |
574 | status = ap_reset_queue(qid); | |
575 | for (i = 0; i < AP_MAX_RESET; i++) { | |
576 | switch (status.response_code) { | |
577 | case AP_RESPONSE_NORMAL: | |
578 | if (status.queue_empty) | |
579 | rc = 0; | |
580 | break; | |
581 | case AP_RESPONSE_Q_NOT_AVAIL: | |
582 | case AP_RESPONSE_DECONFIGURED: | |
583 | case AP_RESPONSE_CHECKSTOPPED: | |
584 | i = AP_MAX_RESET; /* return with -ENODEV */ | |
585 | break; | |
586 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
af512ed0 | 587 | rc = -EBUSY; |
1534c382 MS |
588 | case AP_RESPONSE_BUSY: |
589 | default: | |
590 | break; | |
591 | } | |
af512ed0 | 592 | if (rc != -ENODEV && rc != -EBUSY) |
1534c382 MS |
593 | break; |
594 | if (i < AP_MAX_RESET - 1) { | |
91f3e3ea IT |
595 | /* Time we are waiting until we give up (0.7sec * 90). |
596 | * Since the actual request (in progress) will not | |
597 | * interrupted immediately for the reset command, | |
598 | * we have to be patient. In worst case we have to | |
599 | * wait 60sec + reset time (some msec). | |
600 | */ | |
601 | schedule_timeout(AP_RESET_TIMEOUT); | |
1534c382 MS |
602 | status = ap_test_queue(qid, &dummy, &dummy); |
603 | } | |
604 | } | |
cb17a636 | 605 | if (rc == 0 && ap_using_interrupts()) { |
f4eae94f | 606 | rc = ap_queue_enable_interruption(qid, ap_airq.lsi_ptr); |
cb17a636 FB |
607 | /* If interruption mode is supported by the machine, |
608 | * but an AP can not be enabled for interruption then | |
609 | * the AP will be discarded. */ | |
610 | if (rc) | |
611 | pr_err("Registering adapter interrupts for " | |
612 | "AP %d failed\n", AP_QID_DEVICE(qid)); | |
613 | } | |
1534c382 MS |
614 | return rc; |
615 | } | |
616 | ||
af512ed0 | 617 | /** |
1749a81d FB |
618 | * ap_increase_queue_count(): Arm request timeout. |
619 | * @ap_dev: Pointer to an AP device. | |
620 | * | |
621 | * Arm request timeout if an AP device was idle and a new request is submitted. | |
af512ed0 RW |
622 | */ |
623 | static void ap_increase_queue_count(struct ap_device *ap_dev) | |
624 | { | |
625 | int timeout = ap_dev->drv->request_timeout; | |
626 | ||
627 | ap_dev->queue_count++; | |
628 | if (ap_dev->queue_count == 1) { | |
629 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
630 | ap_dev->reset = AP_RESET_ARMED; | |
631 | } | |
632 | } | |
633 | ||
634 | /** | |
1749a81d FB |
635 | * ap_decrease_queue_count(): Decrease queue count. |
636 | * @ap_dev: Pointer to an AP device. | |
637 | * | |
638 | * If AP device is still alive, re-schedule request timeout if there are still | |
af512ed0 RW |
639 | * pending requests. |
640 | */ | |
641 | static void ap_decrease_queue_count(struct ap_device *ap_dev) | |
642 | { | |
643 | int timeout = ap_dev->drv->request_timeout; | |
644 | ||
645 | ap_dev->queue_count--; | |
646 | if (ap_dev->queue_count > 0) | |
647 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
648 | else | |
1749a81d | 649 | /* |
af512ed0 RW |
650 | * The timeout timer should to be disabled now - since |
651 | * del_timer_sync() is very expensive, we just tell via the | |
652 | * reset flag to ignore the pending timeout timer. | |
653 | */ | |
654 | ap_dev->reset = AP_RESET_IGNORE; | |
655 | } | |
656 | ||
1749a81d | 657 | /* |
1534c382 MS |
658 | * AP device related attributes. |
659 | */ | |
660 | static ssize_t ap_hwtype_show(struct device *dev, | |
661 | struct device_attribute *attr, char *buf) | |
662 | { | |
663 | struct ap_device *ap_dev = to_ap_dev(dev); | |
664 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->device_type); | |
665 | } | |
1534c382 | 666 | |
43c207e6 | 667 | static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL); |
42f4dd61 IT |
668 | |
669 | static ssize_t ap_raw_hwtype_show(struct device *dev, | |
670 | struct device_attribute *attr, char *buf) | |
671 | { | |
672 | struct ap_device *ap_dev = to_ap_dev(dev); | |
673 | ||
674 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->raw_hwtype); | |
675 | } | |
676 | ||
677 | static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL); | |
678 | ||
1534c382 MS |
679 | static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr, |
680 | char *buf) | |
681 | { | |
682 | struct ap_device *ap_dev = to_ap_dev(dev); | |
683 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->queue_depth); | |
684 | } | |
1534c382 | 685 | |
43c207e6 | 686 | static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL); |
1534c382 MS |
687 | static ssize_t ap_request_count_show(struct device *dev, |
688 | struct device_attribute *attr, | |
689 | char *buf) | |
690 | { | |
691 | struct ap_device *ap_dev = to_ap_dev(dev); | |
692 | int rc; | |
693 | ||
694 | spin_lock_bh(&ap_dev->lock); | |
695 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->total_request_count); | |
696 | spin_unlock_bh(&ap_dev->lock); | |
697 | return rc; | |
698 | } | |
699 | ||
700 | static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL); | |
701 | ||
b26bd941 HD |
702 | static ssize_t ap_requestq_count_show(struct device *dev, |
703 | struct device_attribute *attr, char *buf) | |
704 | { | |
705 | struct ap_device *ap_dev = to_ap_dev(dev); | |
706 | int rc; | |
707 | ||
708 | spin_lock_bh(&ap_dev->lock); | |
709 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->requestq_count); | |
710 | spin_unlock_bh(&ap_dev->lock); | |
711 | return rc; | |
712 | } | |
713 | ||
714 | static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL); | |
715 | ||
716 | static ssize_t ap_pendingq_count_show(struct device *dev, | |
717 | struct device_attribute *attr, char *buf) | |
718 | { | |
719 | struct ap_device *ap_dev = to_ap_dev(dev); | |
720 | int rc; | |
721 | ||
722 | spin_lock_bh(&ap_dev->lock); | |
723 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->pendingq_count); | |
724 | spin_unlock_bh(&ap_dev->lock); | |
725 | return rc; | |
726 | } | |
727 | ||
728 | static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL); | |
729 | ||
1534c382 MS |
730 | static ssize_t ap_modalias_show(struct device *dev, |
731 | struct device_attribute *attr, char *buf) | |
732 | { | |
733 | return sprintf(buf, "ap:t%02X", to_ap_dev(dev)->device_type); | |
734 | } | |
735 | ||
736 | static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL); | |
737 | ||
b26bd941 HD |
738 | static ssize_t ap_functions_show(struct device *dev, |
739 | struct device_attribute *attr, char *buf) | |
740 | { | |
741 | struct ap_device *ap_dev = to_ap_dev(dev); | |
742 | return snprintf(buf, PAGE_SIZE, "0x%08X\n", ap_dev->functions); | |
743 | } | |
744 | ||
745 | static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL); | |
746 | ||
1534c382 MS |
747 | static struct attribute *ap_dev_attrs[] = { |
748 | &dev_attr_hwtype.attr, | |
42f4dd61 | 749 | &dev_attr_raw_hwtype.attr, |
1534c382 MS |
750 | &dev_attr_depth.attr, |
751 | &dev_attr_request_count.attr, | |
b26bd941 HD |
752 | &dev_attr_requestq_count.attr, |
753 | &dev_attr_pendingq_count.attr, | |
1534c382 | 754 | &dev_attr_modalias.attr, |
b26bd941 | 755 | &dev_attr_ap_functions.attr, |
1534c382 MS |
756 | NULL |
757 | }; | |
758 | static struct attribute_group ap_dev_attr_group = { | |
759 | .attrs = ap_dev_attrs | |
760 | }; | |
761 | ||
762 | /** | |
1749a81d FB |
763 | * ap_bus_match() |
764 | * @dev: Pointer to device | |
765 | * @drv: Pointer to device_driver | |
766 | * | |
1534c382 MS |
767 | * AP bus driver registration/unregistration. |
768 | */ | |
769 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
770 | { | |
771 | struct ap_device *ap_dev = to_ap_dev(dev); | |
772 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
773 | struct ap_device_id *id; | |
774 | ||
1749a81d | 775 | /* |
1534c382 MS |
776 | * Compare device type of the device with the list of |
777 | * supported types of the device_driver. | |
778 | */ | |
779 | for (id = ap_drv->ids; id->match_flags; id++) { | |
780 | if ((id->match_flags & AP_DEVICE_ID_MATCH_DEVICE_TYPE) && | |
781 | (id->dev_type != ap_dev->device_type)) | |
782 | continue; | |
783 | return 1; | |
784 | } | |
785 | return 0; | |
786 | } | |
787 | ||
788 | /** | |
1749a81d FB |
789 | * ap_uevent(): Uevent function for AP devices. |
790 | * @dev: Pointer to device | |
791 | * @env: Pointer to kobj_uevent_env | |
792 | * | |
793 | * It sets up a single environment variable DEV_TYPE which contains the | |
794 | * hardware device type. | |
1534c382 | 795 | */ |
7eff2e7a | 796 | static int ap_uevent (struct device *dev, struct kobj_uevent_env *env) |
1534c382 MS |
797 | { |
798 | struct ap_device *ap_dev = to_ap_dev(dev); | |
7eff2e7a | 799 | int retval = 0; |
1534c382 MS |
800 | |
801 | if (!ap_dev) | |
802 | return -ENODEV; | |
803 | ||
804 | /* Set up DEV_TYPE environment variable. */ | |
7eff2e7a | 805 | retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); |
bf62456e ER |
806 | if (retval) |
807 | return retval; | |
808 | ||
66a4263b | 809 | /* Add MODALIAS= */ |
7eff2e7a | 810 | retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); |
bf62456e | 811 | |
bf62456e | 812 | return retval; |
1534c382 MS |
813 | } |
814 | ||
772f5472 FB |
815 | static int ap_bus_suspend(struct device *dev, pm_message_t state) |
816 | { | |
817 | struct ap_device *ap_dev = to_ap_dev(dev); | |
818 | unsigned long flags; | |
819 | ||
820 | if (!ap_suspend_flag) { | |
821 | ap_suspend_flag = 1; | |
822 | ||
823 | /* Disable scanning for devices, thus we do not want to scan | |
824 | * for them after removing. | |
825 | */ | |
826 | del_timer_sync(&ap_config_timer); | |
827 | if (ap_work_queue != NULL) { | |
828 | destroy_workqueue(ap_work_queue); | |
829 | ap_work_queue = NULL; | |
830 | } | |
5314af69 | 831 | |
772f5472 FB |
832 | tasklet_disable(&ap_tasklet); |
833 | } | |
834 | /* Poll on the device until all requests are finished. */ | |
835 | do { | |
836 | flags = 0; | |
95f1556c | 837 | spin_lock_bh(&ap_dev->lock); |
772f5472 | 838 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 839 | spin_unlock_bh(&ap_dev->lock); |
772f5472 FB |
840 | } while ((flags & 1) || (flags & 2)); |
841 | ||
5314af69 FB |
842 | spin_lock_bh(&ap_dev->lock); |
843 | ap_dev->unregistered = 1; | |
844 | spin_unlock_bh(&ap_dev->lock); | |
845 | ||
772f5472 FB |
846 | return 0; |
847 | } | |
848 | ||
849 | static int ap_bus_resume(struct device *dev) | |
850 | { | |
772f5472 | 851 | struct ap_device *ap_dev = to_ap_dev(dev); |
f4eae94f | 852 | int rc; |
772f5472 FB |
853 | |
854 | if (ap_suspend_flag) { | |
855 | ap_suspend_flag = 0; | |
f4eae94f MS |
856 | if (ap_interrupts_available()) { |
857 | if (!ap_using_interrupts()) { | |
858 | rc = register_adapter_interrupt(&ap_airq); | |
859 | ap_airq_flag = (rc == 0); | |
860 | } | |
861 | } else { | |
862 | if (ap_using_interrupts()) { | |
863 | unregister_adapter_interrupt(&ap_airq); | |
864 | ap_airq_flag = 0; | |
865 | } | |
866 | } | |
75014550 | 867 | ap_query_configuration(); |
5314af69 FB |
868 | if (!user_set_domain) { |
869 | ap_domain_index = -1; | |
870 | ap_select_domain(); | |
871 | } | |
772f5472 FB |
872 | init_timer(&ap_config_timer); |
873 | ap_config_timer.function = ap_config_timeout; | |
874 | ap_config_timer.data = 0; | |
875 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
876 | add_timer(&ap_config_timer); | |
877 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
878 | if (!ap_work_queue) | |
879 | return -ENOMEM; | |
880 | tasklet_enable(&ap_tasklet); | |
881 | if (!ap_using_interrupts()) | |
882 | ap_schedule_poll_timer(); | |
883 | else | |
884 | tasklet_schedule(&ap_tasklet); | |
885 | if (ap_thread_flag) | |
886 | rc = ap_poll_thread_start(); | |
f4eae94f MS |
887 | else |
888 | rc = 0; | |
889 | } else | |
890 | rc = 0; | |
5314af69 FB |
891 | if (AP_QID_QUEUE(ap_dev->qid) != ap_domain_index) { |
892 | spin_lock_bh(&ap_dev->lock); | |
893 | ap_dev->qid = AP_MKQID(AP_QID_DEVICE(ap_dev->qid), | |
894 | ap_domain_index); | |
895 | spin_unlock_bh(&ap_dev->lock); | |
896 | } | |
897 | queue_work(ap_work_queue, &ap_config_work); | |
772f5472 FB |
898 | |
899 | return rc; | |
900 | } | |
901 | ||
1534c382 MS |
902 | static struct bus_type ap_bus_type = { |
903 | .name = "ap", | |
904 | .match = &ap_bus_match, | |
905 | .uevent = &ap_uevent, | |
772f5472 FB |
906 | .suspend = ap_bus_suspend, |
907 | .resume = ap_bus_resume | |
1534c382 MS |
908 | }; |
909 | ||
910 | static int ap_device_probe(struct device *dev) | |
911 | { | |
912 | struct ap_device *ap_dev = to_ap_dev(dev); | |
913 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); | |
914 | int rc; | |
915 | ||
916 | ap_dev->drv = ap_drv; | |
666e68e0 IT |
917 | |
918 | spin_lock_bh(&ap_device_list_lock); | |
919 | list_add(&ap_dev->list, &ap_device_list); | |
920 | spin_unlock_bh(&ap_device_list_lock); | |
921 | ||
1534c382 | 922 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
666e68e0 | 923 | if (rc) { |
43c207e6 | 924 | spin_lock_bh(&ap_device_list_lock); |
666e68e0 | 925 | list_del_init(&ap_dev->list); |
43c207e6 | 926 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca | 927 | } |
1534c382 MS |
928 | return rc; |
929 | } | |
930 | ||
931 | /** | |
1749a81d FB |
932 | * __ap_flush_queue(): Flush requests. |
933 | * @ap_dev: Pointer to the AP device | |
934 | * | |
1534c382 | 935 | * Flush all requests from the request/pending queue of an AP device. |
1534c382 | 936 | */ |
4d284cac | 937 | static void __ap_flush_queue(struct ap_device *ap_dev) |
1534c382 MS |
938 | { |
939 | struct ap_message *ap_msg, *next; | |
940 | ||
941 | list_for_each_entry_safe(ap_msg, next, &ap_dev->pendingq, list) { | |
942 | list_del_init(&ap_msg->list); | |
943 | ap_dev->pendingq_count--; | |
54a8f561 | 944 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
945 | } |
946 | list_for_each_entry_safe(ap_msg, next, &ap_dev->requestq, list) { | |
947 | list_del_init(&ap_msg->list); | |
948 | ap_dev->requestq_count--; | |
54a8f561 | 949 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
950 | } |
951 | } | |
952 | ||
953 | void ap_flush_queue(struct ap_device *ap_dev) | |
954 | { | |
955 | spin_lock_bh(&ap_dev->lock); | |
956 | __ap_flush_queue(ap_dev); | |
957 | spin_unlock_bh(&ap_dev->lock); | |
958 | } | |
959 | EXPORT_SYMBOL(ap_flush_queue); | |
960 | ||
961 | static int ap_device_remove(struct device *dev) | |
962 | { | |
963 | struct ap_device *ap_dev = to_ap_dev(dev); | |
964 | struct ap_driver *ap_drv = ap_dev->drv; | |
965 | ||
4e56296d | 966 | ap_flush_queue(ap_dev); |
af512ed0 | 967 | del_timer_sync(&ap_dev->timeout); |
43c207e6 | 968 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 969 | list_del_init(&ap_dev->list); |
43c207e6 | 970 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca RW |
971 | if (ap_drv->remove) |
972 | ap_drv->remove(ap_dev); | |
e675c0d2 RW |
973 | spin_lock_bh(&ap_dev->lock); |
974 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
975 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
976 | return 0; |
977 | } | |
978 | ||
979 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, | |
980 | char *name) | |
981 | { | |
982 | struct device_driver *drv = &ap_drv->driver; | |
983 | ||
984 | drv->bus = &ap_bus_type; | |
985 | drv->probe = ap_device_probe; | |
986 | drv->remove = ap_device_remove; | |
987 | drv->owner = owner; | |
988 | drv->name = name; | |
989 | return driver_register(drv); | |
990 | } | |
991 | EXPORT_SYMBOL(ap_driver_register); | |
992 | ||
993 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
994 | { | |
995 | driver_unregister(&ap_drv->driver); | |
996 | } | |
997 | EXPORT_SYMBOL(ap_driver_unregister); | |
998 | ||
dabecb29 HD |
999 | void ap_bus_force_rescan(void) |
1000 | { | |
56bbe686 IT |
1001 | /* reconfigure the AP bus rescan timer. */ |
1002 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); | |
1003 | /* processing a asynchronous bus rescan */ | |
1004 | queue_work(ap_work_queue, &ap_config_work); | |
1005 | flush_work(&ap_config_work); | |
dabecb29 HD |
1006 | } |
1007 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
1008 | ||
1749a81d | 1009 | /* |
1534c382 MS |
1010 | * AP bus attributes. |
1011 | */ | |
1012 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) | |
1013 | { | |
1014 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); | |
1015 | } | |
1016 | ||
1017 | static BUS_ATTR(ap_domain, 0444, ap_domain_show, NULL); | |
1018 | ||
91f3e3ea IT |
1019 | static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf) |
1020 | { | |
1021 | if (ap_configuration != NULL) { /* QCI not supported */ | |
1022 | if (test_facility(76)) { /* format 1 - 256 bit domain field */ | |
1023 | return snprintf(buf, PAGE_SIZE, | |
1024 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
1025 | ap_configuration->adm[0], ap_configuration->adm[1], | |
1026 | ap_configuration->adm[2], ap_configuration->adm[3], | |
1027 | ap_configuration->adm[4], ap_configuration->adm[5], | |
1028 | ap_configuration->adm[6], ap_configuration->adm[7]); | |
1029 | } else { /* format 0 - 16 bit domain field */ | |
1030 | return snprintf(buf, PAGE_SIZE, "%08x%08x\n", | |
1031 | ap_configuration->adm[0], ap_configuration->adm[1]); | |
1032 | } | |
1033 | } else { | |
1034 | return snprintf(buf, PAGE_SIZE, "not supported\n"); | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | static BUS_ATTR(ap_control_domain_mask, 0444, | |
1039 | ap_control_domain_mask_show, NULL); | |
1040 | ||
1534c382 MS |
1041 | static ssize_t ap_config_time_show(struct bus_type *bus, char *buf) |
1042 | { | |
1043 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); | |
1044 | } | |
1045 | ||
cb17a636 FB |
1046 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
1047 | { | |
1048 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
1049 | ap_using_interrupts() ? 1 : 0); | |
1050 | } | |
1051 | ||
1052 | static BUS_ATTR(ap_interrupts, 0444, ap_interrupts_show, NULL); | |
1053 | ||
1534c382 MS |
1054 | static ssize_t ap_config_time_store(struct bus_type *bus, |
1055 | const char *buf, size_t count) | |
1056 | { | |
1057 | int time; | |
1058 | ||
1059 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1060 | return -EINVAL; | |
1061 | ap_config_time = time; | |
1062 | if (!timer_pending(&ap_config_timer) || | |
1063 | !mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ)) { | |
1064 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1065 | add_timer(&ap_config_timer); | |
1066 | } | |
1067 | return count; | |
1068 | } | |
1069 | ||
1070 | static BUS_ATTR(config_time, 0644, ap_config_time_show, ap_config_time_store); | |
1071 | ||
1072 | static ssize_t ap_poll_thread_show(struct bus_type *bus, char *buf) | |
1073 | { | |
1074 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); | |
1075 | } | |
1076 | ||
1077 | static ssize_t ap_poll_thread_store(struct bus_type *bus, | |
1078 | const char *buf, size_t count) | |
1079 | { | |
1080 | int flag, rc; | |
1081 | ||
1082 | if (sscanf(buf, "%d\n", &flag) != 1) | |
1083 | return -EINVAL; | |
1084 | if (flag) { | |
1085 | rc = ap_poll_thread_start(); | |
1086 | if (rc) | |
1087 | return rc; | |
1088 | } | |
1089 | else | |
1090 | ap_poll_thread_stop(); | |
1091 | return count; | |
1092 | } | |
1093 | ||
1094 | static BUS_ATTR(poll_thread, 0644, ap_poll_thread_show, ap_poll_thread_store); | |
1095 | ||
fe137230 FB |
1096 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
1097 | { | |
1098 | return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); | |
1099 | } | |
1100 | ||
1101 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
1102 | size_t count) | |
1103 | { | |
1104 | unsigned long long time; | |
1105 | ktime_t hr_time; | |
1106 | ||
1107 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
1108 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
1109 | time > 120000000000ULL) | |
fe137230 FB |
1110 | return -EINVAL; |
1111 | poll_timeout = time; | |
1112 | hr_time = ktime_set(0, poll_timeout); | |
1113 | ||
1114 | if (!hrtimer_is_queued(&ap_poll_timer) || | |
6c644eae AV |
1115 | !hrtimer_forward(&ap_poll_timer, hrtimer_get_expires(&ap_poll_timer), hr_time)) { |
1116 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1117 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
fe137230 FB |
1118 | } |
1119 | return count; | |
1120 | } | |
1121 | ||
1122 | static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store); | |
1123 | ||
1534c382 MS |
1124 | static struct bus_attribute *const ap_bus_attrs[] = { |
1125 | &bus_attr_ap_domain, | |
91f3e3ea | 1126 | &bus_attr_ap_control_domain_mask, |
1534c382 MS |
1127 | &bus_attr_config_time, |
1128 | &bus_attr_poll_thread, | |
cb17a636 | 1129 | &bus_attr_ap_interrupts, |
fe137230 FB |
1130 | &bus_attr_poll_timeout, |
1131 | NULL, | |
1534c382 MS |
1132 | }; |
1133 | ||
75014550 HD |
1134 | static inline int ap_test_config(unsigned int *field, unsigned int nr) |
1135 | { | |
1136 | if (nr > 0xFFu) | |
1137 | return 0; | |
1138 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
1143 | * @id AP card ID | |
1144 | * | |
1145 | * Returns 0 if the card is not configured | |
1146 | * 1 if the card is configured or | |
1147 | * if the configuration information is not available | |
1148 | */ | |
1149 | static inline int ap_test_config_card_id(unsigned int id) | |
1150 | { | |
1151 | if (!ap_configuration) | |
1152 | return 1; | |
1153 | return ap_test_config(ap_configuration->apm, id); | |
1154 | } | |
1155 | ||
1156 | /* | |
1157 | * ap_test_config_domain(): Test, whether an AP usage domain is configured. | |
1158 | * @domain AP usage domain ID | |
1159 | * | |
1160 | * Returns 0 if the usage domain is not configured | |
1161 | * 1 if the usage domain is configured or | |
1162 | * if the configuration information is not available | |
1163 | */ | |
1164 | static inline int ap_test_config_domain(unsigned int domain) | |
1165 | { | |
1166 | if (!ap_configuration) | |
1167 | return 1; | |
1168 | return ap_test_config(ap_configuration->aqm, domain); | |
1169 | } | |
1170 | ||
1171 | /** | |
1172 | * ap_query_configuration(): Query AP configuration information. | |
1173 | * | |
1174 | * Query information of installed cards and configured domains from AP. | |
1175 | */ | |
1176 | static void ap_query_configuration(void) | |
1177 | { | |
1178 | #ifdef CONFIG_64BIT | |
1179 | if (ap_configuration_available()) { | |
1180 | if (!ap_configuration) | |
1181 | ap_configuration = | |
1182 | kzalloc(sizeof(struct ap_config_info), | |
1183 | GFP_KERNEL); | |
1184 | if (ap_configuration) | |
1185 | __ap_query_configuration(ap_configuration); | |
1186 | } else | |
1187 | ap_configuration = NULL; | |
1188 | #else | |
1189 | ap_configuration = NULL; | |
1190 | #endif | |
1191 | } | |
1192 | ||
1534c382 | 1193 | /** |
1749a81d FB |
1194 | * ap_select_domain(): Select an AP domain. |
1195 | * | |
1196 | * Pick one of the 16 AP domains. | |
1534c382 | 1197 | */ |
4d284cac | 1198 | static int ap_select_domain(void) |
1534c382 MS |
1199 | { |
1200 | int queue_depth, device_type, count, max_count, best_domain; | |
75014550 | 1201 | ap_qid_t qid; |
1534c382 MS |
1202 | int rc, i, j; |
1203 | ||
170387a8 IT |
1204 | /* IF APXA isn't installed, only 16 domains could be defined */ |
1205 | if (!ap_configuration->ap_extended && (ap_domain_index > 15)) | |
1206 | return -EINVAL; | |
1207 | ||
1749a81d | 1208 | /* |
1534c382 MS |
1209 | * We want to use a single domain. Either the one specified with |
1210 | * the "domain=" parameter or the domain with the maximum number | |
1211 | * of devices. | |
1212 | */ | |
1213 | if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS) | |
1214 | /* Domain has already been selected. */ | |
1215 | return 0; | |
1216 | best_domain = -1; | |
1217 | max_count = 0; | |
1218 | for (i = 0; i < AP_DOMAINS; i++) { | |
75014550 HD |
1219 | if (!ap_test_config_domain(i)) |
1220 | continue; | |
1534c382 MS |
1221 | count = 0; |
1222 | for (j = 0; j < AP_DEVICES; j++) { | |
75014550 HD |
1223 | if (!ap_test_config_card_id(j)) |
1224 | continue; | |
1225 | qid = AP_MKQID(j, i); | |
1534c382 MS |
1226 | rc = ap_query_queue(qid, &queue_depth, &device_type); |
1227 | if (rc) | |
1228 | continue; | |
1229 | count++; | |
1230 | } | |
1231 | if (count > max_count) { | |
1232 | max_count = count; | |
1233 | best_domain = i; | |
1234 | } | |
1235 | } | |
1236 | if (best_domain >= 0){ | |
1237 | ap_domain_index = best_domain; | |
1238 | return 0; | |
1239 | } | |
1240 | return -ENODEV; | |
1241 | } | |
1242 | ||
1243 | /** | |
1749a81d | 1244 | * ap_probe_device_type(): Find the device type of an AP. |
1534c382 | 1245 | * @ap_dev: pointer to the AP device. |
1749a81d FB |
1246 | * |
1247 | * Find the device type if query queue returned a device type of 0. | |
1534c382 MS |
1248 | */ |
1249 | static int ap_probe_device_type(struct ap_device *ap_dev) | |
1250 | { | |
1251 | static unsigned char msg[] = { | |
1252 | 0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00, | |
1253 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1254 | 0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00, | |
1255 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1256 | 0x01,0x00,0x43,0x43,0x41,0x2d,0x41,0x50, | |
1257 | 0x50,0x4c,0x20,0x20,0x20,0x01,0x01,0x01, | |
1258 | 0x00,0x00,0x00,0x00,0x50,0x4b,0x00,0x00, | |
1259 | 0x00,0x00,0x01,0x1c,0x00,0x00,0x00,0x00, | |
1260 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1261 | 0x00,0x00,0x05,0xb8,0x00,0x00,0x00,0x00, | |
1262 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1263 | 0x70,0x00,0x41,0x00,0x00,0x00,0x00,0x00, | |
1264 | 0x00,0x00,0x54,0x32,0x01,0x00,0xa0,0x00, | |
1265 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1266 | 0x00,0x00,0x00,0x00,0xb8,0x05,0x00,0x00, | |
1267 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1268 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1269 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1270 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1271 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1272 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1273 | 0x00,0x00,0x0a,0x00,0x00,0x00,0x00,0x00, | |
1274 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1275 | 0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00, | |
1276 | 0x49,0x43,0x53,0x46,0x20,0x20,0x20,0x20, | |
1277 | 0x50,0x4b,0x0a,0x00,0x50,0x4b,0x43,0x53, | |
1278 | 0x2d,0x31,0x2e,0x32,0x37,0x00,0x11,0x22, | |
1279 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1280 | 0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88, | |
1281 | 0x99,0x00,0x11,0x22,0x33,0x44,0x55,0x66, | |
1282 | 0x77,0x88,0x99,0x00,0x11,0x22,0x33,0x44, | |
1283 | 0x55,0x66,0x77,0x88,0x99,0x00,0x11,0x22, | |
1284 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1285 | 0x11,0x22,0x33,0x5d,0x00,0x5b,0x00,0x77, | |
1286 | 0x88,0x1e,0x00,0x00,0x57,0x00,0x00,0x00, | |
1287 | 0x00,0x04,0x00,0x00,0x4f,0x00,0x00,0x00, | |
1288 | 0x03,0x02,0x00,0x00,0x40,0x01,0x00,0x01, | |
1289 | 0xce,0x02,0x68,0x2d,0x5f,0xa9,0xde,0x0c, | |
1290 | 0xf6,0xd2,0x7b,0x58,0x4b,0xf9,0x28,0x68, | |
1291 | 0x3d,0xb4,0xf4,0xef,0x78,0xd5,0xbe,0x66, | |
1292 | 0x63,0x42,0xef,0xf8,0xfd,0xa4,0xf8,0xb0, | |
1293 | 0x8e,0x29,0xc2,0xc9,0x2e,0xd8,0x45,0xb8, | |
1294 | 0x53,0x8c,0x6f,0x4e,0x72,0x8f,0x6c,0x04, | |
1295 | 0x9c,0x88,0xfc,0x1e,0xc5,0x83,0x55,0x57, | |
1296 | 0xf7,0xdd,0xfd,0x4f,0x11,0x36,0x95,0x5d, | |
1297 | }; | |
1298 | struct ap_queue_status status; | |
1299 | unsigned long long psmid; | |
1300 | char *reply; | |
1301 | int rc, i; | |
1302 | ||
1303 | reply = (void *) get_zeroed_page(GFP_KERNEL); | |
1304 | if (!reply) { | |
1305 | rc = -ENOMEM; | |
1306 | goto out; | |
1307 | } | |
1308 | ||
1309 | status = __ap_send(ap_dev->qid, 0x0102030405060708ULL, | |
a6a5d73a | 1310 | msg, sizeof(msg), 0); |
1534c382 MS |
1311 | if (status.response_code != AP_RESPONSE_NORMAL) { |
1312 | rc = -ENODEV; | |
1313 | goto out_free; | |
1314 | } | |
1315 | ||
1316 | /* Wait for the test message to complete. */ | |
1317 | for (i = 0; i < 6; i++) { | |
1318 | mdelay(300); | |
1319 | status = __ap_recv(ap_dev->qid, &psmid, reply, 4096); | |
1320 | if (status.response_code == AP_RESPONSE_NORMAL && | |
1321 | psmid == 0x0102030405060708ULL) | |
1322 | break; | |
1323 | } | |
1324 | if (i < 6) { | |
1325 | /* Got an answer. */ | |
1326 | if (reply[0] == 0x00 && reply[1] == 0x86) | |
1327 | ap_dev->device_type = AP_DEVICE_TYPE_PCICC; | |
1328 | else | |
1329 | ap_dev->device_type = AP_DEVICE_TYPE_PCICA; | |
1330 | rc = 0; | |
1331 | } else | |
1332 | rc = -ENODEV; | |
1333 | ||
1334 | out_free: | |
1335 | free_page((unsigned long) reply); | |
1336 | out: | |
1337 | return rc; | |
1338 | } | |
1339 | ||
f4eae94f | 1340 | static void ap_interrupt_handler(struct airq_struct *airq) |
cb17a636 | 1341 | { |
420f42ec | 1342 | inc_irq_stat(IRQIO_APB); |
cb17a636 FB |
1343 | tasklet_schedule(&ap_tasklet); |
1344 | } | |
1345 | ||
1534c382 | 1346 | /** |
1749a81d FB |
1347 | * __ap_scan_bus(): Scan the AP bus. |
1348 | * @dev: Pointer to device | |
1349 | * @data: Pointer to data | |
1350 | * | |
1351 | * Scan the AP bus for new devices. | |
1534c382 MS |
1352 | */ |
1353 | static int __ap_scan_bus(struct device *dev, void *data) | |
1354 | { | |
1355 | return to_ap_dev(dev)->qid == (ap_qid_t)(unsigned long) data; | |
1356 | } | |
1357 | ||
1358 | static void ap_device_release(struct device *dev) | |
1359 | { | |
1360 | struct ap_device *ap_dev = to_ap_dev(dev); | |
1361 | ||
1362 | kfree(ap_dev); | |
1363 | } | |
1364 | ||
4927b3f7 | 1365 | static void ap_scan_bus(struct work_struct *unused) |
1534c382 MS |
1366 | { |
1367 | struct ap_device *ap_dev; | |
1368 | struct device *dev; | |
1369 | ap_qid_t qid; | |
1370 | int queue_depth, device_type; | |
6bed05bc | 1371 | unsigned int device_functions; |
1534c382 MS |
1372 | int rc, i; |
1373 | ||
75014550 | 1374 | ap_query_configuration(); |
56bbe686 | 1375 | if (ap_select_domain() != 0) { |
1534c382 | 1376 | return; |
56bbe686 | 1377 | } |
1534c382 MS |
1378 | for (i = 0; i < AP_DEVICES; i++) { |
1379 | qid = AP_MKQID(i, ap_domain_index); | |
1380 | dev = bus_find_device(&ap_bus_type, NULL, | |
1381 | (void *)(unsigned long)qid, | |
1382 | __ap_scan_bus); | |
75014550 HD |
1383 | if (ap_test_config_card_id(i)) |
1384 | rc = ap_query_queue(qid, &queue_depth, &device_type); | |
1385 | else | |
1386 | rc = -ENODEV; | |
c6a48264 | 1387 | if (dev) { |
af512ed0 RW |
1388 | if (rc == -EBUSY) { |
1389 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1390 | schedule_timeout(AP_RESET_TIMEOUT); | |
1391 | rc = ap_query_queue(qid, &queue_depth, | |
1392 | &device_type); | |
1393 | } | |
c6a48264 RW |
1394 | ap_dev = to_ap_dev(dev); |
1395 | spin_lock_bh(&ap_dev->lock); | |
1396 | if (rc || ap_dev->unregistered) { | |
1397 | spin_unlock_bh(&ap_dev->lock); | |
5314af69 FB |
1398 | if (ap_dev->unregistered) |
1399 | i--; | |
c6a48264 | 1400 | device_unregister(dev); |
af512ed0 | 1401 | put_device(dev); |
c6a48264 | 1402 | continue; |
af512ed0 RW |
1403 | } |
1404 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
1405 | put_device(dev); |
1406 | continue; | |
1407 | } | |
1534c382 MS |
1408 | if (rc) |
1409 | continue; | |
1410 | rc = ap_init_queue(qid); | |
1411 | if (rc) | |
1412 | continue; | |
1413 | ap_dev = kzalloc(sizeof(*ap_dev), GFP_KERNEL); | |
1414 | if (!ap_dev) | |
1415 | break; | |
1416 | ap_dev->qid = qid; | |
1417 | ap_dev->queue_depth = queue_depth; | |
4e56296d | 1418 | ap_dev->unregistered = 1; |
1534c382 MS |
1419 | spin_lock_init(&ap_dev->lock); |
1420 | INIT_LIST_HEAD(&ap_dev->pendingq); | |
1421 | INIT_LIST_HEAD(&ap_dev->requestq); | |
cf352ce0 | 1422 | INIT_LIST_HEAD(&ap_dev->list); |
af512ed0 RW |
1423 | setup_timer(&ap_dev->timeout, ap_request_timeout, |
1424 | (unsigned long) ap_dev); | |
6bed05bc HD |
1425 | switch (device_type) { |
1426 | case 0: | |
1e2076f4 | 1427 | /* device type probing for old cards */ |
cf2d007b HD |
1428 | if (ap_probe_device_type(ap_dev)) { |
1429 | kfree(ap_dev); | |
1430 | continue; | |
1431 | } | |
6bed05bc | 1432 | break; |
42f4dd61 IT |
1433 | case 11: |
1434 | ap_dev->device_type = 10; | |
1435 | break; | |
6bed05bc | 1436 | default: |
1534c382 | 1437 | ap_dev->device_type = device_type; |
6bed05bc | 1438 | } |
42f4dd61 | 1439 | ap_dev->raw_hwtype = device_type; |
1534c382 | 1440 | |
1e2076f4 HD |
1441 | rc = ap_query_functions(qid, &device_functions); |
1442 | if (!rc) | |
1443 | ap_dev->functions = device_functions; | |
1444 | else | |
1445 | ap_dev->functions = 0u; | |
1446 | ||
1534c382 MS |
1447 | ap_dev->device.bus = &ap_bus_type; |
1448 | ap_dev->device.parent = ap_root_device; | |
edc44fa0 FB |
1449 | if (dev_set_name(&ap_dev->device, "card%02x", |
1450 | AP_QID_DEVICE(ap_dev->qid))) { | |
1451 | kfree(ap_dev); | |
1452 | continue; | |
1453 | } | |
1534c382 MS |
1454 | ap_dev->device.release = ap_device_release; |
1455 | rc = device_register(&ap_dev->device); | |
1456 | if (rc) { | |
c6304933 | 1457 | put_device(&ap_dev->device); |
1534c382 MS |
1458 | continue; |
1459 | } | |
1460 | /* Add device attributes. */ | |
1461 | rc = sysfs_create_group(&ap_dev->device.kobj, | |
1462 | &ap_dev_attr_group); | |
4e56296d RW |
1463 | if (!rc) { |
1464 | spin_lock_bh(&ap_dev->lock); | |
1465 | ap_dev->unregistered = 0; | |
1466 | spin_unlock_bh(&ap_dev->lock); | |
1467 | } | |
1468 | else | |
1534c382 MS |
1469 | device_unregister(&ap_dev->device); |
1470 | } | |
1471 | } | |
1472 | ||
1473 | static void | |
1474 | ap_config_timeout(unsigned long ptr) | |
1475 | { | |
1476 | queue_work(ap_work_queue, &ap_config_work); | |
1477 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1478 | add_timer(&ap_config_timer); | |
1479 | } | |
1480 | ||
1481 | /** | |
bc615dea | 1482 | * __ap_schedule_poll_timer(): Schedule poll timer. |
1749a81d | 1483 | * |
1534c382 MS |
1484 | * Set up the timer to run the poll tasklet |
1485 | */ | |
bc615dea | 1486 | static inline void __ap_schedule_poll_timer(void) |
1534c382 | 1487 | { |
8d406c6d | 1488 | ktime_t hr_time; |
93521314 FB |
1489 | |
1490 | spin_lock_bh(&ap_poll_timer_lock); | |
bc615dea | 1491 | if (hrtimer_is_queued(&ap_poll_timer) || ap_suspend_flag) |
93521314 | 1492 | goto out; |
8d406c6d FB |
1493 | if (ktime_to_ns(hrtimer_expires_remaining(&ap_poll_timer)) <= 0) { |
1494 | hr_time = ktime_set(0, poll_timeout); | |
1495 | hrtimer_forward_now(&ap_poll_timer, hr_time); | |
1496 | hrtimer_restart(&ap_poll_timer); | |
1497 | } | |
93521314 FB |
1498 | out: |
1499 | spin_unlock_bh(&ap_poll_timer_lock); | |
1534c382 MS |
1500 | } |
1501 | ||
bc615dea HD |
1502 | /** |
1503 | * ap_schedule_poll_timer(): Schedule poll timer. | |
1504 | * | |
1505 | * Set up the timer to run the poll tasklet | |
1506 | */ | |
1507 | static inline void ap_schedule_poll_timer(void) | |
1508 | { | |
1509 | if (ap_using_interrupts()) | |
1510 | return; | |
1511 | __ap_schedule_poll_timer(); | |
1512 | } | |
1513 | ||
1534c382 | 1514 | /** |
1749a81d | 1515 | * ap_poll_read(): Receive pending reply messages from an AP device. |
1534c382 MS |
1516 | * @ap_dev: pointer to the AP device |
1517 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1518 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1519 | * |
1534c382 MS |
1520 | * Returns 0 if the device is still present, -ENODEV if not. |
1521 | */ | |
4d284cac | 1522 | static int ap_poll_read(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1523 | { |
1524 | struct ap_queue_status status; | |
1525 | struct ap_message *ap_msg; | |
1526 | ||
1527 | if (ap_dev->queue_count <= 0) | |
1528 | return 0; | |
1529 | status = __ap_recv(ap_dev->qid, &ap_dev->reply->psmid, | |
1530 | ap_dev->reply->message, ap_dev->reply->length); | |
1531 | switch (status.response_code) { | |
1532 | case AP_RESPONSE_NORMAL: | |
1533 | atomic_dec(&ap_poll_requests); | |
af512ed0 | 1534 | ap_decrease_queue_count(ap_dev); |
1534c382 MS |
1535 | list_for_each_entry(ap_msg, &ap_dev->pendingq, list) { |
1536 | if (ap_msg->psmid != ap_dev->reply->psmid) | |
1537 | continue; | |
1538 | list_del_init(&ap_msg->list); | |
1539 | ap_dev->pendingq_count--; | |
54a8f561 | 1540 | ap_msg->receive(ap_dev, ap_msg, ap_dev->reply); |
1534c382 MS |
1541 | break; |
1542 | } | |
1543 | if (ap_dev->queue_count > 0) | |
1544 | *flags |= 1; | |
1545 | break; | |
1546 | case AP_RESPONSE_NO_PENDING_REPLY: | |
1547 | if (status.queue_empty) { | |
1548 | /* The card shouldn't forget requests but who knows. */ | |
e675c0d2 | 1549 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); |
1534c382 MS |
1550 | ap_dev->queue_count = 0; |
1551 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1552 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1553 | ap_dev->pendingq_count = 0; | |
1554 | } else | |
1555 | *flags |= 2; | |
1556 | break; | |
1557 | default: | |
1558 | return -ENODEV; | |
1559 | } | |
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | /** | |
1749a81d | 1564 | * ap_poll_write(): Send messages from the request queue to an AP device. |
1534c382 MS |
1565 | * @ap_dev: pointer to the AP device |
1566 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1567 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1568 | * |
1534c382 MS |
1569 | * Returns 0 if the device is still present, -ENODEV if not. |
1570 | */ | |
4d284cac | 1571 | static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1572 | { |
1573 | struct ap_queue_status status; | |
1574 | struct ap_message *ap_msg; | |
1575 | ||
1576 | if (ap_dev->requestq_count <= 0 || | |
1577 | ap_dev->queue_count >= ap_dev->queue_depth) | |
1578 | return 0; | |
1579 | /* Start the next request on the queue. */ | |
1580 | ap_msg = list_entry(ap_dev->requestq.next, struct ap_message, list); | |
1581 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a | 1582 | ap_msg->message, ap_msg->length, ap_msg->special); |
1534c382 MS |
1583 | switch (status.response_code) { |
1584 | case AP_RESPONSE_NORMAL: | |
1585 | atomic_inc(&ap_poll_requests); | |
af512ed0 | 1586 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1587 | list_move_tail(&ap_msg->list, &ap_dev->pendingq); |
1588 | ap_dev->requestq_count--; | |
1589 | ap_dev->pendingq_count++; | |
1590 | if (ap_dev->queue_count < ap_dev->queue_depth && | |
1591 | ap_dev->requestq_count > 0) | |
1592 | *flags |= 1; | |
1593 | *flags |= 2; | |
1594 | break; | |
af512ed0 | 1595 | case AP_RESPONSE_RESET_IN_PROGRESS: |
bc615dea HD |
1596 | __ap_schedule_poll_timer(); |
1597 | case AP_RESPONSE_Q_FULL: | |
1534c382 MS |
1598 | *flags |= 2; |
1599 | break; | |
1600 | case AP_RESPONSE_MESSAGE_TOO_BIG: | |
a6a5d73a | 1601 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 MS |
1602 | return -EINVAL; |
1603 | default: | |
1604 | return -ENODEV; | |
1605 | } | |
1606 | return 0; | |
1607 | } | |
1608 | ||
1609 | /** | |
1749a81d | 1610 | * ap_poll_queue(): Poll AP device for pending replies and send new messages. |
1534c382 MS |
1611 | * @ap_dev: pointer to the bus device |
1612 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1613 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d FB |
1614 | * |
1615 | * Poll AP device for pending replies and send new messages. If either | |
1616 | * ap_poll_read or ap_poll_write returns -ENODEV unregister the device. | |
1534c382 MS |
1617 | * Returns 0. |
1618 | */ | |
1619 | static inline int ap_poll_queue(struct ap_device *ap_dev, unsigned long *flags) | |
1620 | { | |
1621 | int rc; | |
1622 | ||
1623 | rc = ap_poll_read(ap_dev, flags); | |
1624 | if (rc) | |
1625 | return rc; | |
1626 | return ap_poll_write(ap_dev, flags); | |
1627 | } | |
1628 | ||
1629 | /** | |
1749a81d | 1630 | * __ap_queue_message(): Queue a message to a device. |
1534c382 MS |
1631 | * @ap_dev: pointer to the AP device |
1632 | * @ap_msg: the message to be queued | |
1749a81d FB |
1633 | * |
1634 | * Queue a message to a device. Returns 0 if successful. | |
1534c382 MS |
1635 | */ |
1636 | static int __ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1637 | { | |
1638 | struct ap_queue_status status; | |
1639 | ||
1640 | if (list_empty(&ap_dev->requestq) && | |
1641 | ap_dev->queue_count < ap_dev->queue_depth) { | |
1642 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a FB |
1643 | ap_msg->message, ap_msg->length, |
1644 | ap_msg->special); | |
1534c382 MS |
1645 | switch (status.response_code) { |
1646 | case AP_RESPONSE_NORMAL: | |
1647 | list_add_tail(&ap_msg->list, &ap_dev->pendingq); | |
1648 | atomic_inc(&ap_poll_requests); | |
1649 | ap_dev->pendingq_count++; | |
af512ed0 | 1650 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1651 | ap_dev->total_request_count++; |
1652 | break; | |
1653 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 1654 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 MS |
1655 | list_add_tail(&ap_msg->list, &ap_dev->requestq); |
1656 | ap_dev->requestq_count++; | |
1657 | ap_dev->total_request_count++; | |
1658 | return -EBUSY; | |
a6a5d73a | 1659 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 | 1660 | case AP_RESPONSE_MESSAGE_TOO_BIG: |
54a8f561 | 1661 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-EINVAL)); |
1534c382 MS |
1662 | return -EINVAL; |
1663 | default: /* Device is gone. */ | |
54a8f561 | 1664 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
1665 | return -ENODEV; |
1666 | } | |
1667 | } else { | |
1668 | list_add_tail(&ap_msg->list, &ap_dev->requestq); | |
1669 | ap_dev->requestq_count++; | |
1670 | ap_dev->total_request_count++; | |
1671 | return -EBUSY; | |
1672 | } | |
1673 | ap_schedule_poll_timer(); | |
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1678 | { | |
1679 | unsigned long flags; | |
1680 | int rc; | |
1681 | ||
54a8f561 HD |
1682 | /* For asynchronous message handling a valid receive-callback |
1683 | * is required. */ | |
1684 | BUG_ON(!ap_msg->receive); | |
1685 | ||
1534c382 MS |
1686 | spin_lock_bh(&ap_dev->lock); |
1687 | if (!ap_dev->unregistered) { | |
1688 | /* Make room on the queue by polling for finished requests. */ | |
1689 | rc = ap_poll_queue(ap_dev, &flags); | |
1690 | if (!rc) | |
1691 | rc = __ap_queue_message(ap_dev, ap_msg); | |
1692 | if (!rc) | |
1693 | wake_up(&ap_poll_wait); | |
4e56296d RW |
1694 | if (rc == -ENODEV) |
1695 | ap_dev->unregistered = 1; | |
1534c382 | 1696 | } else { |
54a8f561 | 1697 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
c6a48264 | 1698 | rc = -ENODEV; |
1534c382 MS |
1699 | } |
1700 | spin_unlock_bh(&ap_dev->lock); | |
1701 | if (rc == -ENODEV) | |
1702 | device_unregister(&ap_dev->device); | |
1703 | } | |
1704 | EXPORT_SYMBOL(ap_queue_message); | |
1705 | ||
1706 | /** | |
1749a81d FB |
1707 | * ap_cancel_message(): Cancel a crypto request. |
1708 | * @ap_dev: The AP device that has the message queued | |
1709 | * @ap_msg: The message that is to be removed | |
1710 | * | |
1534c382 | 1711 | * Cancel a crypto request. This is done by removing the request |
1749a81d | 1712 | * from the device pending or request queue. Note that the |
1534c382 MS |
1713 | * request stays on the AP queue. When it finishes the message |
1714 | * reply will be discarded because the psmid can't be found. | |
1534c382 MS |
1715 | */ |
1716 | void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1717 | { | |
1718 | struct ap_message *tmp; | |
1719 | ||
1720 | spin_lock_bh(&ap_dev->lock); | |
1721 | if (!list_empty(&ap_msg->list)) { | |
1722 | list_for_each_entry(tmp, &ap_dev->pendingq, list) | |
1723 | if (tmp->psmid == ap_msg->psmid) { | |
1724 | ap_dev->pendingq_count--; | |
1725 | goto found; | |
1726 | } | |
1727 | ap_dev->requestq_count--; | |
1728 | found: | |
1729 | list_del_init(&ap_msg->list); | |
1730 | } | |
1731 | spin_unlock_bh(&ap_dev->lock); | |
1732 | } | |
1733 | EXPORT_SYMBOL(ap_cancel_message); | |
1734 | ||
1735 | /** | |
1749a81d | 1736 | * ap_poll_timeout(): AP receive polling for finished AP requests. |
fe137230 | 1737 | * @unused: Unused pointer. |
1749a81d | 1738 | * |
fe137230 | 1739 | * Schedules the AP tasklet using a high resolution timer. |
1534c382 | 1740 | */ |
fe137230 | 1741 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) |
1534c382 MS |
1742 | { |
1743 | tasklet_schedule(&ap_tasklet); | |
fe137230 | 1744 | return HRTIMER_NORESTART; |
1534c382 MS |
1745 | } |
1746 | ||
af512ed0 | 1747 | /** |
1749a81d FB |
1748 | * ap_reset(): Reset a not responding AP device. |
1749 | * @ap_dev: Pointer to the AP device | |
1750 | * | |
af512ed0 RW |
1751 | * Reset a not responding AP device and move all requests from the |
1752 | * pending queue to the request queue. | |
1753 | */ | |
1754 | static void ap_reset(struct ap_device *ap_dev) | |
1755 | { | |
1756 | int rc; | |
1757 | ||
1758 | ap_dev->reset = AP_RESET_IGNORE; | |
1759 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
1760 | ap_dev->queue_count = 0; | |
1761 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1762 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1763 | ap_dev->pendingq_count = 0; | |
1764 | rc = ap_init_queue(ap_dev->qid); | |
1765 | if (rc == -ENODEV) | |
1766 | ap_dev->unregistered = 1; | |
75464960 HD |
1767 | else |
1768 | __ap_schedule_poll_timer(); | |
af512ed0 RW |
1769 | } |
1770 | ||
43c207e6 | 1771 | static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 | 1772 | { |
1534c382 | 1773 | if (!ap_dev->unregistered) { |
c6a48264 | 1774 | if (ap_poll_queue(ap_dev, flags)) |
4e56296d | 1775 | ap_dev->unregistered = 1; |
af512ed0 RW |
1776 | if (ap_dev->reset == AP_RESET_DO) |
1777 | ap_reset(ap_dev); | |
c6a48264 | 1778 | } |
1534c382 MS |
1779 | return 0; |
1780 | } | |
1781 | ||
1749a81d FB |
1782 | /** |
1783 | * ap_poll_all(): Poll all AP devices. | |
1784 | * @dummy: Unused variable | |
1785 | * | |
1786 | * Poll all AP devices on the bus in a round robin fashion. Continue | |
1787 | * polling until bit 2^0 of the control flags is not set. If bit 2^1 | |
1788 | * of the control flags has been set arm the poll timer. | |
1789 | */ | |
1534c382 MS |
1790 | static void ap_poll_all(unsigned long dummy) |
1791 | { | |
1792 | unsigned long flags; | |
cf352ce0 | 1793 | struct ap_device *ap_dev; |
1534c382 | 1794 | |
cb17a636 FB |
1795 | /* Reset the indicator if interrupts are used. Thus new interrupts can |
1796 | * be received. Doing it in the beginning of the tasklet is therefor | |
1797 | * important that no requests on any AP get lost. | |
1798 | */ | |
1799 | if (ap_using_interrupts()) | |
f4eae94f | 1800 | xchg(ap_airq.lsi_ptr, 0); |
1534c382 MS |
1801 | do { |
1802 | flags = 0; | |
43c207e6 | 1803 | spin_lock(&ap_device_list_lock); |
cf352ce0 | 1804 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1805 | spin_lock(&ap_dev->lock); |
43c207e6 | 1806 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1807 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1808 | } |
43c207e6 | 1809 | spin_unlock(&ap_device_list_lock); |
1534c382 MS |
1810 | } while (flags & 1); |
1811 | if (flags & 2) | |
1812 | ap_schedule_poll_timer(); | |
1813 | } | |
1814 | ||
1815 | /** | |
1749a81d FB |
1816 | * ap_poll_thread(): Thread that polls for finished requests. |
1817 | * @data: Unused pointer | |
1818 | * | |
1534c382 MS |
1819 | * AP bus poll thread. The purpose of this thread is to poll for |
1820 | * finished requests in a loop if there is a "free" cpu - that is | |
1821 | * a cpu that doesn't have anything better to do. The polling stops | |
1822 | * as soon as there is another task or if all messages have been | |
1823 | * delivered. | |
1824 | */ | |
1825 | static int ap_poll_thread(void *data) | |
1826 | { | |
1827 | DECLARE_WAITQUEUE(wait, current); | |
1828 | unsigned long flags; | |
1829 | int requests; | |
cf352ce0 | 1830 | struct ap_device *ap_dev; |
1534c382 | 1831 | |
8698a745 | 1832 | set_user_nice(current, MAX_NICE); |
1534c382 | 1833 | while (1) { |
772f5472 FB |
1834 | if (ap_suspend_flag) |
1835 | return 0; | |
1534c382 MS |
1836 | if (need_resched()) { |
1837 | schedule(); | |
1838 | continue; | |
1839 | } | |
1840 | add_wait_queue(&ap_poll_wait, &wait); | |
1841 | set_current_state(TASK_INTERRUPTIBLE); | |
1842 | if (kthread_should_stop()) | |
1843 | break; | |
1844 | requests = atomic_read(&ap_poll_requests); | |
1845 | if (requests <= 0) | |
1846 | schedule(); | |
1847 | set_current_state(TASK_RUNNING); | |
1848 | remove_wait_queue(&ap_poll_wait, &wait); | |
1849 | ||
1534c382 | 1850 | flags = 0; |
43c207e6 | 1851 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 1852 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1853 | spin_lock(&ap_dev->lock); |
43c207e6 | 1854 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1855 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1856 | } |
43c207e6 | 1857 | spin_unlock_bh(&ap_device_list_lock); |
1534c382 MS |
1858 | } |
1859 | set_current_state(TASK_RUNNING); | |
1860 | remove_wait_queue(&ap_poll_wait, &wait); | |
1861 | return 0; | |
1862 | } | |
1863 | ||
1864 | static int ap_poll_thread_start(void) | |
1865 | { | |
1866 | int rc; | |
1867 | ||
772f5472 | 1868 | if (ap_using_interrupts() || ap_suspend_flag) |
cb17a636 | 1869 | return 0; |
1534c382 MS |
1870 | mutex_lock(&ap_poll_thread_mutex); |
1871 | if (!ap_poll_kthread) { | |
1872 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
ba8da213 | 1873 | rc = PTR_RET(ap_poll_kthread); |
1534c382 MS |
1874 | if (rc) |
1875 | ap_poll_kthread = NULL; | |
1876 | } | |
1877 | else | |
1878 | rc = 0; | |
1879 | mutex_unlock(&ap_poll_thread_mutex); | |
1880 | return rc; | |
1881 | } | |
1882 | ||
1883 | static void ap_poll_thread_stop(void) | |
1884 | { | |
1885 | mutex_lock(&ap_poll_thread_mutex); | |
1886 | if (ap_poll_kthread) { | |
1887 | kthread_stop(ap_poll_kthread); | |
1888 | ap_poll_kthread = NULL; | |
1889 | } | |
1890 | mutex_unlock(&ap_poll_thread_mutex); | |
1891 | } | |
1892 | ||
af512ed0 | 1893 | /** |
1749a81d FB |
1894 | * ap_request_timeout(): Handling of request timeouts |
1895 | * @data: Holds the AP device. | |
1896 | * | |
1897 | * Handles request timeouts. | |
af512ed0 RW |
1898 | */ |
1899 | static void ap_request_timeout(unsigned long data) | |
1900 | { | |
1901 | struct ap_device *ap_dev = (struct ap_device *) data; | |
1902 | ||
cb17a636 | 1903 | if (ap_dev->reset == AP_RESET_ARMED) { |
af512ed0 | 1904 | ap_dev->reset = AP_RESET_DO; |
cb17a636 FB |
1905 | |
1906 | if (ap_using_interrupts()) | |
1907 | tasklet_schedule(&ap_tasklet); | |
1908 | } | |
af512ed0 RW |
1909 | } |
1910 | ||
13e742ba RW |
1911 | static void ap_reset_domain(void) |
1912 | { | |
1913 | int i; | |
1914 | ||
39aa7cf6 RW |
1915 | if (ap_domain_index != -1) |
1916 | for (i = 0; i < AP_DEVICES; i++) | |
1917 | ap_reset_queue(AP_MKQID(i, ap_domain_index)); | |
13e742ba RW |
1918 | } |
1919 | ||
1920 | static void ap_reset_all(void) | |
85eca850 RW |
1921 | { |
1922 | int i, j; | |
1923 | ||
170387a8 IT |
1924 | for (i = 0; i < AP_DOMAINS; i++) { |
1925 | if (!ap_test_config_domain(i)) | |
1926 | continue; | |
1927 | for (j = 0; j < AP_DEVICES; j++) { | |
1928 | if (!ap_test_config_card_id(j)) | |
1929 | continue; | |
85eca850 | 1930 | ap_reset_queue(AP_MKQID(j, i)); |
170387a8 IT |
1931 | } |
1932 | } | |
85eca850 RW |
1933 | } |
1934 | ||
1935 | static struct reset_call ap_reset_call = { | |
13e742ba | 1936 | .fn = ap_reset_all, |
85eca850 RW |
1937 | }; |
1938 | ||
1534c382 | 1939 | /** |
1749a81d FB |
1940 | * ap_module_init(): The module initialization code. |
1941 | * | |
1942 | * Initializes the module. | |
1534c382 MS |
1943 | */ |
1944 | int __init ap_module_init(void) | |
1945 | { | |
1946 | int rc, i; | |
1947 | ||
1948 | if (ap_domain_index < -1 || ap_domain_index >= AP_DOMAINS) { | |
136f7a1c MS |
1949 | pr_warning("%d is not a valid cryptographic domain\n", |
1950 | ap_domain_index); | |
1534c382 MS |
1951 | return -EINVAL; |
1952 | } | |
5314af69 FB |
1953 | /* In resume callback we need to know if the user had set the domain. |
1954 | * If so, we can not just reset it. | |
1955 | */ | |
1956 | if (ap_domain_index >= 0) | |
1957 | user_set_domain = 1; | |
1958 | ||
1534c382 | 1959 | if (ap_instructions_available() != 0) { |
136f7a1c MS |
1960 | pr_warning("The hardware system does not support " |
1961 | "AP instructions\n"); | |
1534c382 MS |
1962 | return -ENODEV; |
1963 | } | |
cb17a636 | 1964 | if (ap_interrupts_available()) { |
f4eae94f MS |
1965 | rc = register_adapter_interrupt(&ap_airq); |
1966 | ap_airq_flag = (rc == 0); | |
cb17a636 FB |
1967 | } |
1968 | ||
85eca850 | 1969 | register_reset_call(&ap_reset_call); |
1534c382 MS |
1970 | |
1971 | /* Create /sys/bus/ap. */ | |
1972 | rc = bus_register(&ap_bus_type); | |
1973 | if (rc) | |
1974 | goto out; | |
1975 | for (i = 0; ap_bus_attrs[i]; i++) { | |
1976 | rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]); | |
1977 | if (rc) | |
1978 | goto out_bus; | |
1979 | } | |
1980 | ||
1981 | /* Create /sys/devices/ap. */ | |
035da16f | 1982 | ap_root_device = root_device_register("ap"); |
ba8da213 | 1983 | rc = PTR_RET(ap_root_device); |
1534c382 MS |
1984 | if (rc) |
1985 | goto out_bus; | |
1986 | ||
1987 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
1988 | if (!ap_work_queue) { | |
1989 | rc = -ENOMEM; | |
1990 | goto out_root; | |
1991 | } | |
1992 | ||
75014550 | 1993 | ap_query_configuration(); |
1534c382 MS |
1994 | if (ap_select_domain() == 0) |
1995 | ap_scan_bus(NULL); | |
1996 | ||
1749a81d | 1997 | /* Setup the AP bus rescan timer. */ |
1534c382 MS |
1998 | init_timer(&ap_config_timer); |
1999 | ap_config_timer.function = ap_config_timeout; | |
2000 | ap_config_timer.data = 0; | |
2001 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
2002 | add_timer(&ap_config_timer); | |
2003 | ||
fe137230 FB |
2004 | /* Setup the high resultion poll timer. |
2005 | * If we are running under z/VM adjust polling to z/VM polling rate. | |
2006 | */ | |
2007 | if (MACHINE_IS_VM) | |
2008 | poll_timeout = 1500000; | |
93521314 | 2009 | spin_lock_init(&ap_poll_timer_lock); |
fe137230 FB |
2010 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
2011 | ap_poll_timer.function = ap_poll_timeout; | |
2012 | ||
1534c382 MS |
2013 | /* Start the low priority AP bus poll thread. */ |
2014 | if (ap_thread_flag) { | |
2015 | rc = ap_poll_thread_start(); | |
2016 | if (rc) | |
2017 | goto out_work; | |
2018 | } | |
2019 | ||
2020 | return 0; | |
2021 | ||
2022 | out_work: | |
2023 | del_timer_sync(&ap_config_timer); | |
fe137230 | 2024 | hrtimer_cancel(&ap_poll_timer); |
1534c382 MS |
2025 | destroy_workqueue(ap_work_queue); |
2026 | out_root: | |
035da16f | 2027 | root_device_unregister(ap_root_device); |
1534c382 MS |
2028 | out_bus: |
2029 | while (i--) | |
2030 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
2031 | bus_unregister(&ap_bus_type); | |
2032 | out: | |
85eca850 | 2033 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
2034 | if (ap_using_interrupts()) |
2035 | unregister_adapter_interrupt(&ap_airq); | |
1534c382 MS |
2036 | return rc; |
2037 | } | |
2038 | ||
2039 | static int __ap_match_all(struct device *dev, void *data) | |
2040 | { | |
2041 | return 1; | |
2042 | } | |
2043 | ||
2044 | /** | |
1749a81d FB |
2045 | * ap_modules_exit(): The module termination code |
2046 | * | |
2047 | * Terminates the module. | |
1534c382 MS |
2048 | */ |
2049 | void ap_module_exit(void) | |
2050 | { | |
2051 | int i; | |
2052 | struct device *dev; | |
2053 | ||
13e742ba | 2054 | ap_reset_domain(); |
1534c382 MS |
2055 | ap_poll_thread_stop(); |
2056 | del_timer_sync(&ap_config_timer); | |
fe137230 | 2057 | hrtimer_cancel(&ap_poll_timer); |
1534c382 | 2058 | destroy_workqueue(ap_work_queue); |
13e742ba | 2059 | tasklet_kill(&ap_tasklet); |
035da16f | 2060 | root_device_unregister(ap_root_device); |
1534c382 MS |
2061 | while ((dev = bus_find_device(&ap_bus_type, NULL, NULL, |
2062 | __ap_match_all))) | |
2063 | { | |
2064 | device_unregister(dev); | |
2065 | put_device(dev); | |
2066 | } | |
2067 | for (i = 0; ap_bus_attrs[i]; i++) | |
2068 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
2069 | bus_unregister(&ap_bus_type); | |
85eca850 | 2070 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
2071 | if (ap_using_interrupts()) |
2072 | unregister_adapter_interrupt(&ap_airq); | |
1534c382 MS |
2073 | } |
2074 | ||
1534c382 MS |
2075 | module_init(ap_module_init); |
2076 | module_exit(ap_module_exit); |