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); |
c50a160c | 63 | static void ap_reset(struct ap_device *ap_dev, unsigned long *flags); |
772f5472 | 64 | static void ap_config_timeout(unsigned long ptr); |
5314af69 | 65 | static int ap_select_domain(void); |
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 | |
6acbe21f | 185 | * @info: Pointer to queue descriptor |
1534c382 | 186 | * |
1749a81d | 187 | * Returns AP queue status structure. |
1534c382 MS |
188 | */ |
189 | static inline struct ap_queue_status | |
6acbe21f | 190 | ap_test_queue(ap_qid_t qid, unsigned long *info) |
1534c382 MS |
191 | { |
192 | register unsigned long reg0 asm ("0") = qid; | |
193 | register struct ap_queue_status reg1 asm ("1"); | |
194 | register unsigned long reg2 asm ("2") = 0UL; | |
195 | ||
6acbe21f MS |
196 | if (test_facility(15)) |
197 | reg0 |= 1UL << 23; /* set APFT T bit*/ | |
1534c382 MS |
198 | asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ |
199 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
6acbe21f MS |
200 | if (info) |
201 | *info = reg2; | |
1534c382 MS |
202 | return reg1; |
203 | } | |
204 | ||
205 | /** | |
1749a81d FB |
206 | * ap_reset_queue(): Reset adjunct processor queue. |
207 | * @qid: The AP queue number | |
1534c382 | 208 | * |
1749a81d | 209 | * Returns AP queue status structure. |
1534c382 MS |
210 | */ |
211 | static inline struct ap_queue_status ap_reset_queue(ap_qid_t qid) | |
212 | { | |
213 | register unsigned long reg0 asm ("0") = qid | 0x01000000UL; | |
214 | register struct ap_queue_status reg1 asm ("1"); | |
215 | register unsigned long reg2 asm ("2") = 0UL; | |
216 | ||
217 | asm volatile( | |
218 | ".long 0xb2af0000" /* PQAP(RAPQ) */ | |
219 | : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); | |
220 | return reg1; | |
221 | } | |
222 | ||
cb17a636 FB |
223 | /** |
224 | * ap_queue_interruption_control(): Enable interruption for a specific AP. | |
225 | * @qid: The AP queue number | |
226 | * @ind: The notification indicator byte | |
227 | * | |
228 | * Returns AP queue status. | |
229 | */ | |
230 | static inline struct ap_queue_status | |
231 | ap_queue_interruption_control(ap_qid_t qid, void *ind) | |
232 | { | |
233 | register unsigned long reg0 asm ("0") = qid | 0x03000000UL; | |
234 | register unsigned long reg1_in asm ("1") = 0x0000800000000000UL | AP_ISC; | |
235 | register struct ap_queue_status reg1_out asm ("1"); | |
236 | register void *reg2 asm ("2") = ind; | |
237 | asm volatile( | |
a7475afd | 238 | ".long 0xb2af0000" /* PQAP(AQIC) */ |
cb17a636 FB |
239 | : "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2) |
240 | : | |
241 | : "cc" ); | |
242 | return reg1_out; | |
243 | } | |
cb17a636 | 244 | |
75014550 HD |
245 | static inline int __ap_query_configuration(struct ap_config_info *config) |
246 | { | |
247 | register unsigned long reg0 asm ("0") = 0x04000000UL; | |
248 | register unsigned long reg1 asm ("1") = -EINVAL; | |
249 | register unsigned char *reg2 asm ("2") = (unsigned char *)config; | |
250 | ||
251 | asm volatile( | |
252 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
253 | "0: la %1,0\n" | |
254 | "1:\n" | |
255 | EX_TABLE(0b, 1b) | |
256 | : "+d" (reg0), "+d" (reg1), "+d" (reg2) | |
257 | : | |
258 | : "cc"); | |
259 | ||
260 | return reg1; | |
261 | } | |
75014550 | 262 | |
cb17a636 FB |
263 | /** |
264 | * ap_queue_enable_interruption(): Enable interruption on an AP. | |
265 | * @qid: The AP queue number | |
266 | * @ind: the notification indicator byte | |
267 | * | |
268 | * Enables interruption on AP queue via ap_queue_interruption_control(). Based | |
269 | * on the return value it waits a while and tests the AP queue if interrupts | |
270 | * have been switched on using ap_test_queue(). | |
271 | */ | |
c50a160c | 272 | static int ap_queue_enable_interruption(struct ap_device *ap_dev, void *ind) |
cb17a636 | 273 | { |
cb17a636 | 274 | struct ap_queue_status status; |
cb17a636 | 275 | |
c50a160c IT |
276 | status = ap_queue_interruption_control(ap_dev->qid, ind); |
277 | switch (status.response_code) { | |
278 | case AP_RESPONSE_NORMAL: | |
279 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
280 | return 0; | |
281 | case AP_RESPONSE_Q_NOT_AVAIL: | |
282 | case AP_RESPONSE_DECONFIGURED: | |
283 | case AP_RESPONSE_CHECKSTOPPED: | |
284 | case AP_RESPONSE_INVALID_ADDRESS: | |
285 | return -ENODEV; | |
286 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
287 | case AP_RESPONSE_BUSY: | |
288 | default: | |
289 | return -EBUSY; | |
cb17a636 | 290 | } |
cb17a636 FB |
291 | } |
292 | ||
1534c382 | 293 | /** |
1749a81d FB |
294 | * __ap_send(): Send message to adjunct processor queue. |
295 | * @qid: The AP queue number | |
296 | * @psmid: The program supplied message identifier | |
297 | * @msg: The message text | |
298 | * @length: The message length | |
a6a5d73a | 299 | * @special: Special Bit |
1534c382 | 300 | * |
1749a81d | 301 | * Returns AP queue status structure. |
1534c382 | 302 | * Condition code 1 on NQAP can't happen because the L bit is 1. |
1534c382 MS |
303 | * Condition code 2 on NQAP also means the send is incomplete, |
304 | * because a segment boundary was reached. The NQAP is repeated. | |
305 | */ | |
306 | static inline struct ap_queue_status | |
a6a5d73a FB |
307 | __ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length, |
308 | unsigned int special) | |
1534c382 MS |
309 | { |
310 | typedef struct { char _[length]; } msgblock; | |
311 | register unsigned long reg0 asm ("0") = qid | 0x40000000UL; | |
312 | register struct ap_queue_status reg1 asm ("1"); | |
313 | register unsigned long reg2 asm ("2") = (unsigned long) msg; | |
314 | register unsigned long reg3 asm ("3") = (unsigned long) length; | |
315 | register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32); | |
7d6c3b49 | 316 | register unsigned long reg5 asm ("5") = psmid & 0xffffffff; |
1534c382 | 317 | |
a6a5d73a FB |
318 | if (special == 1) |
319 | reg0 |= 0x400000UL; | |
320 | ||
1534c382 | 321 | asm volatile ( |
a7475afd | 322 | "0: .long 0xb2ad0042\n" /* NQAP */ |
1534c382 MS |
323 | " brc 2,0b" |
324 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) | |
325 | : "d" (reg4), "d" (reg5), "m" (*(msgblock *) msg) | |
326 | : "cc" ); | |
327 | return reg1; | |
328 | } | |
329 | ||
330 | int ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) | |
331 | { | |
332 | struct ap_queue_status status; | |
333 | ||
a6a5d73a | 334 | status = __ap_send(qid, psmid, msg, length, 0); |
1534c382 MS |
335 | switch (status.response_code) { |
336 | case AP_RESPONSE_NORMAL: | |
337 | return 0; | |
338 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 339 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 | 340 | return -EBUSY; |
a6a5d73a FB |
341 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
342 | return -EINVAL; | |
1534c382 MS |
343 | default: /* Device is gone. */ |
344 | return -ENODEV; | |
345 | } | |
346 | } | |
347 | EXPORT_SYMBOL(ap_send); | |
348 | ||
1749a81d FB |
349 | /** |
350 | * __ap_recv(): Receive message from adjunct processor queue. | |
351 | * @qid: The AP queue number | |
352 | * @psmid: Pointer to program supplied message identifier | |
353 | * @msg: The message text | |
354 | * @length: The message length | |
1534c382 | 355 | * |
1749a81d | 356 | * Returns AP queue status structure. |
1534c382 MS |
357 | * Condition code 1 on DQAP means the receive has taken place |
358 | * but only partially. The response is incomplete, hence the | |
359 | * DQAP is repeated. | |
1534c382 MS |
360 | * Condition code 2 on DQAP also means the receive is incomplete, |
361 | * this time because a segment boundary was reached. Again, the | |
362 | * DQAP is repeated. | |
1534c382 MS |
363 | * Note that gpr2 is used by the DQAP instruction to keep track of |
364 | * any 'residual' length, in case the instruction gets interrupted. | |
365 | * Hence it gets zeroed before the instruction. | |
366 | */ | |
367 | static inline struct ap_queue_status | |
368 | __ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
369 | { | |
370 | typedef struct { char _[length]; } msgblock; | |
371 | register unsigned long reg0 asm("0") = qid | 0x80000000UL; | |
372 | register struct ap_queue_status reg1 asm ("1"); | |
373 | register unsigned long reg2 asm("2") = 0UL; | |
374 | register unsigned long reg4 asm("4") = (unsigned long) msg; | |
375 | register unsigned long reg5 asm("5") = (unsigned long) length; | |
376 | register unsigned long reg6 asm("6") = 0UL; | |
377 | register unsigned long reg7 asm("7") = 0UL; | |
378 | ||
379 | ||
380 | asm volatile( | |
a7475afd | 381 | "0: .long 0xb2ae0064\n" /* DQAP */ |
1534c382 MS |
382 | " brc 6,0b\n" |
383 | : "+d" (reg0), "=d" (reg1), "+d" (reg2), | |
384 | "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7), | |
385 | "=m" (*(msgblock *) msg) : : "cc" ); | |
386 | *psmid = (((unsigned long long) reg6) << 32) + reg7; | |
387 | return reg1; | |
388 | } | |
389 | ||
390 | int ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) | |
391 | { | |
392 | struct ap_queue_status status; | |
393 | ||
394 | status = __ap_recv(qid, psmid, msg, length); | |
395 | switch (status.response_code) { | |
396 | case AP_RESPONSE_NORMAL: | |
397 | return 0; | |
398 | case AP_RESPONSE_NO_PENDING_REPLY: | |
399 | if (status.queue_empty) | |
400 | return -ENOENT; | |
401 | return -EBUSY; | |
af512ed0 RW |
402 | case AP_RESPONSE_RESET_IN_PROGRESS: |
403 | return -EBUSY; | |
1534c382 MS |
404 | default: |
405 | return -ENODEV; | |
406 | } | |
407 | } | |
408 | EXPORT_SYMBOL(ap_recv); | |
409 | ||
c50a160c IT |
410 | /** |
411 | * __ap_schedule_poll_timer(): Schedule poll timer. | |
412 | * | |
413 | * Set up the timer to run the poll tasklet | |
414 | */ | |
415 | static inline void __ap_schedule_poll_timer(void) | |
416 | { | |
417 | ktime_t hr_time; | |
418 | ||
419 | spin_lock_bh(&ap_poll_timer_lock); | |
420 | if (!hrtimer_is_queued(&ap_poll_timer) && !ap_suspend_flag) { | |
421 | hr_time = ktime_set(0, poll_timeout); | |
422 | hrtimer_forward_now(&ap_poll_timer, hr_time); | |
423 | hrtimer_restart(&ap_poll_timer); | |
424 | } | |
425 | spin_unlock_bh(&ap_poll_timer_lock); | |
426 | } | |
427 | ||
428 | /** | |
429 | * ap_schedule_poll_timer(): Schedule poll timer. | |
430 | * | |
431 | * Set up the timer to run the poll tasklet | |
432 | */ | |
433 | static inline void ap_schedule_poll_timer(void) | |
434 | { | |
435 | if (ap_using_interrupts()) | |
436 | return; | |
437 | __ap_schedule_poll_timer(); | |
438 | } | |
439 | ||
440 | ||
1534c382 | 441 | /** |
1749a81d FB |
442 | * ap_query_queue(): Check if an AP queue is available. |
443 | * @qid: The AP queue number | |
444 | * @queue_depth: Pointer to queue depth value | |
445 | * @device_type: Pointer to device type value | |
6acbe21f | 446 | * @facilities: Pointer to facility indicator |
1534c382 | 447 | */ |
6acbe21f MS |
448 | static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type, |
449 | unsigned int *facilities) | |
1534c382 MS |
450 | { |
451 | struct ap_queue_status status; | |
6acbe21f | 452 | unsigned long info; |
1534c382 | 453 | |
6acbe21f | 454 | status = ap_test_queue(qid, &info); |
c50a160c IT |
455 | switch (status.response_code) { |
456 | case AP_RESPONSE_NORMAL: | |
6acbe21f MS |
457 | *queue_depth = (int)(info & 0xff); |
458 | *device_type = (int)((info >> 24) & 0xff); | |
459 | *facilities = (unsigned int)(info >> 32); | |
c50a160c IT |
460 | return 0; |
461 | case AP_RESPONSE_Q_NOT_AVAIL: | |
462 | case AP_RESPONSE_DECONFIGURED: | |
463 | case AP_RESPONSE_CHECKSTOPPED: | |
464 | case AP_RESPONSE_INVALID_ADDRESS: | |
465 | return -ENODEV; | |
466 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
467 | case AP_RESPONSE_OTHERWISE_CHANGED: | |
468 | case AP_RESPONSE_BUSY: | |
469 | return -EBUSY; | |
470 | default: | |
471 | BUG(); | |
1534c382 | 472 | } |
1534c382 MS |
473 | } |
474 | ||
475 | /** | |
1749a81d FB |
476 | * ap_init_queue(): Reset an AP queue. |
477 | * @qid: The AP queue number | |
478 | * | |
c50a160c IT |
479 | * Submit the Reset command to an AP queue. |
480 | * Since the reset is asynchron set the state to 'RESET_IN_PROGRESS' | |
481 | * and check later via ap_poll_queue() if the reset is done. | |
1534c382 | 482 | */ |
c50a160c | 483 | static int ap_init_queue(struct ap_device *ap_dev) |
1534c382 MS |
484 | { |
485 | struct ap_queue_status status; | |
1534c382 | 486 | |
c50a160c IT |
487 | status = ap_reset_queue(ap_dev->qid); |
488 | switch (status.response_code) { | |
489 | case AP_RESPONSE_NORMAL: | |
490 | ap_dev->interrupt = AP_INTR_DISABLED; | |
491 | ap_dev->reset = AP_RESET_IN_PROGRESS; | |
492 | return 0; | |
493 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
494 | case AP_RESPONSE_BUSY: | |
495 | return -EBUSY; | |
496 | case AP_RESPONSE_Q_NOT_AVAIL: | |
497 | case AP_RESPONSE_DECONFIGURED: | |
498 | case AP_RESPONSE_CHECKSTOPPED: | |
499 | default: | |
500 | return -ENODEV; | |
cb17a636 | 501 | } |
1534c382 MS |
502 | } |
503 | ||
af512ed0 | 504 | /** |
1749a81d FB |
505 | * ap_increase_queue_count(): Arm request timeout. |
506 | * @ap_dev: Pointer to an AP device. | |
507 | * | |
508 | * Arm request timeout if an AP device was idle and a new request is submitted. | |
af512ed0 RW |
509 | */ |
510 | static void ap_increase_queue_count(struct ap_device *ap_dev) | |
511 | { | |
512 | int timeout = ap_dev->drv->request_timeout; | |
513 | ||
514 | ap_dev->queue_count++; | |
515 | if (ap_dev->queue_count == 1) { | |
516 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
517 | ap_dev->reset = AP_RESET_ARMED; | |
518 | } | |
519 | } | |
520 | ||
521 | /** | |
1749a81d FB |
522 | * ap_decrease_queue_count(): Decrease queue count. |
523 | * @ap_dev: Pointer to an AP device. | |
524 | * | |
525 | * If AP device is still alive, re-schedule request timeout if there are still | |
af512ed0 RW |
526 | * pending requests. |
527 | */ | |
528 | static void ap_decrease_queue_count(struct ap_device *ap_dev) | |
529 | { | |
530 | int timeout = ap_dev->drv->request_timeout; | |
531 | ||
532 | ap_dev->queue_count--; | |
533 | if (ap_dev->queue_count > 0) | |
534 | mod_timer(&ap_dev->timeout, jiffies + timeout); | |
535 | else | |
1749a81d | 536 | /* |
af512ed0 RW |
537 | * The timeout timer should to be disabled now - since |
538 | * del_timer_sync() is very expensive, we just tell via the | |
539 | * reset flag to ignore the pending timeout timer. | |
540 | */ | |
541 | ap_dev->reset = AP_RESET_IGNORE; | |
542 | } | |
543 | ||
1749a81d | 544 | /* |
1534c382 MS |
545 | * AP device related attributes. |
546 | */ | |
547 | static ssize_t ap_hwtype_show(struct device *dev, | |
548 | struct device_attribute *attr, char *buf) | |
549 | { | |
550 | struct ap_device *ap_dev = to_ap_dev(dev); | |
551 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->device_type); | |
552 | } | |
1534c382 | 553 | |
43c207e6 | 554 | static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL); |
42f4dd61 IT |
555 | |
556 | static ssize_t ap_raw_hwtype_show(struct device *dev, | |
557 | struct device_attribute *attr, char *buf) | |
558 | { | |
559 | struct ap_device *ap_dev = to_ap_dev(dev); | |
560 | ||
561 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->raw_hwtype); | |
562 | } | |
563 | ||
564 | static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL); | |
565 | ||
1534c382 MS |
566 | static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr, |
567 | char *buf) | |
568 | { | |
569 | struct ap_device *ap_dev = to_ap_dev(dev); | |
570 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->queue_depth); | |
571 | } | |
1534c382 | 572 | |
43c207e6 | 573 | static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL); |
1534c382 MS |
574 | static ssize_t ap_request_count_show(struct device *dev, |
575 | struct device_attribute *attr, | |
576 | char *buf) | |
577 | { | |
578 | struct ap_device *ap_dev = to_ap_dev(dev); | |
579 | int rc; | |
580 | ||
581 | spin_lock_bh(&ap_dev->lock); | |
582 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->total_request_count); | |
583 | spin_unlock_bh(&ap_dev->lock); | |
584 | return rc; | |
585 | } | |
586 | ||
587 | static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL); | |
588 | ||
b26bd941 HD |
589 | static ssize_t ap_requestq_count_show(struct device *dev, |
590 | struct device_attribute *attr, char *buf) | |
591 | { | |
592 | struct ap_device *ap_dev = to_ap_dev(dev); | |
593 | int rc; | |
594 | ||
595 | spin_lock_bh(&ap_dev->lock); | |
596 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->requestq_count); | |
597 | spin_unlock_bh(&ap_dev->lock); | |
598 | return rc; | |
599 | } | |
600 | ||
601 | static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL); | |
602 | ||
603 | static ssize_t ap_pendingq_count_show(struct device *dev, | |
604 | struct device_attribute *attr, char *buf) | |
605 | { | |
606 | struct ap_device *ap_dev = to_ap_dev(dev); | |
607 | int rc; | |
608 | ||
609 | spin_lock_bh(&ap_dev->lock); | |
610 | rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->pendingq_count); | |
611 | spin_unlock_bh(&ap_dev->lock); | |
612 | return rc; | |
613 | } | |
614 | ||
615 | static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL); | |
616 | ||
c50a160c IT |
617 | static ssize_t ap_reset_show(struct device *dev, |
618 | struct device_attribute *attr, char *buf) | |
619 | { | |
620 | struct ap_device *ap_dev = to_ap_dev(dev); | |
621 | int rc = 0; | |
622 | ||
623 | spin_lock_bh(&ap_dev->lock); | |
624 | switch (ap_dev->reset) { | |
625 | case AP_RESET_IGNORE: | |
626 | rc = snprintf(buf, PAGE_SIZE, "No Reset Timer set.\n"); | |
627 | break; | |
628 | case AP_RESET_ARMED: | |
629 | rc = snprintf(buf, PAGE_SIZE, "Reset Timer armed.\n"); | |
630 | break; | |
631 | case AP_RESET_DO: | |
632 | rc = snprintf(buf, PAGE_SIZE, "Reset Timer expired.\n"); | |
633 | break; | |
634 | case AP_RESET_IN_PROGRESS: | |
635 | rc = snprintf(buf, PAGE_SIZE, "Reset in progress.\n"); | |
636 | break; | |
637 | default: | |
638 | break; | |
639 | } | |
640 | spin_unlock_bh(&ap_dev->lock); | |
641 | return rc; | |
642 | } | |
643 | ||
644 | static DEVICE_ATTR(reset, 0444, ap_reset_show, NULL); | |
645 | ||
646 | static ssize_t ap_interrupt_show(struct device *dev, | |
647 | struct device_attribute *attr, char *buf) | |
648 | { | |
649 | struct ap_device *ap_dev = to_ap_dev(dev); | |
650 | int rc = 0; | |
651 | ||
652 | spin_lock_bh(&ap_dev->lock); | |
653 | switch (ap_dev->interrupt) { | |
654 | case AP_INTR_DISABLED: | |
655 | rc = snprintf(buf, PAGE_SIZE, "Interrupts disabled.\n"); | |
656 | break; | |
657 | case AP_INTR_ENABLED: | |
658 | rc = snprintf(buf, PAGE_SIZE, "Interrupts enabled.\n"); | |
659 | break; | |
660 | case AP_INTR_IN_PROGRESS: | |
661 | rc = snprintf(buf, PAGE_SIZE, "Enable Interrupt pending.\n"); | |
662 | break; | |
663 | } | |
664 | spin_unlock_bh(&ap_dev->lock); | |
665 | return rc; | |
666 | } | |
667 | ||
668 | static DEVICE_ATTR(interrupt, 0444, ap_interrupt_show, NULL); | |
669 | ||
1534c382 MS |
670 | static ssize_t ap_modalias_show(struct device *dev, |
671 | struct device_attribute *attr, char *buf) | |
672 | { | |
c50a160c | 673 | return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type); |
1534c382 MS |
674 | } |
675 | ||
676 | static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL); | |
677 | ||
b26bd941 HD |
678 | static ssize_t ap_functions_show(struct device *dev, |
679 | struct device_attribute *attr, char *buf) | |
680 | { | |
681 | struct ap_device *ap_dev = to_ap_dev(dev); | |
682 | return snprintf(buf, PAGE_SIZE, "0x%08X\n", ap_dev->functions); | |
683 | } | |
684 | ||
685 | static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL); | |
686 | ||
1534c382 MS |
687 | static struct attribute *ap_dev_attrs[] = { |
688 | &dev_attr_hwtype.attr, | |
42f4dd61 | 689 | &dev_attr_raw_hwtype.attr, |
1534c382 MS |
690 | &dev_attr_depth.attr, |
691 | &dev_attr_request_count.attr, | |
b26bd941 HD |
692 | &dev_attr_requestq_count.attr, |
693 | &dev_attr_pendingq_count.attr, | |
c50a160c IT |
694 | &dev_attr_reset.attr, |
695 | &dev_attr_interrupt.attr, | |
1534c382 | 696 | &dev_attr_modalias.attr, |
b26bd941 | 697 | &dev_attr_ap_functions.attr, |
1534c382 MS |
698 | NULL |
699 | }; | |
700 | static struct attribute_group ap_dev_attr_group = { | |
701 | .attrs = ap_dev_attrs | |
702 | }; | |
703 | ||
704 | /** | |
1749a81d FB |
705 | * ap_bus_match() |
706 | * @dev: Pointer to device | |
707 | * @drv: Pointer to device_driver | |
708 | * | |
1534c382 MS |
709 | * AP bus driver registration/unregistration. |
710 | */ | |
711 | static int ap_bus_match(struct device *dev, struct device_driver *drv) | |
712 | { | |
713 | struct ap_device *ap_dev = to_ap_dev(dev); | |
714 | struct ap_driver *ap_drv = to_ap_drv(drv); | |
715 | struct ap_device_id *id; | |
716 | ||
1749a81d | 717 | /* |
1534c382 MS |
718 | * Compare device type of the device with the list of |
719 | * supported types of the device_driver. | |
720 | */ | |
721 | for (id = ap_drv->ids; id->match_flags; id++) { | |
722 | if ((id->match_flags & AP_DEVICE_ID_MATCH_DEVICE_TYPE) && | |
723 | (id->dev_type != ap_dev->device_type)) | |
724 | continue; | |
725 | return 1; | |
726 | } | |
727 | return 0; | |
728 | } | |
729 | ||
730 | /** | |
1749a81d FB |
731 | * ap_uevent(): Uevent function for AP devices. |
732 | * @dev: Pointer to device | |
733 | * @env: Pointer to kobj_uevent_env | |
734 | * | |
735 | * It sets up a single environment variable DEV_TYPE which contains the | |
736 | * hardware device type. | |
1534c382 | 737 | */ |
7eff2e7a | 738 | static int ap_uevent (struct device *dev, struct kobj_uevent_env *env) |
1534c382 MS |
739 | { |
740 | struct ap_device *ap_dev = to_ap_dev(dev); | |
7eff2e7a | 741 | int retval = 0; |
1534c382 MS |
742 | |
743 | if (!ap_dev) | |
744 | return -ENODEV; | |
745 | ||
746 | /* Set up DEV_TYPE environment variable. */ | |
7eff2e7a | 747 | retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type); |
bf62456e ER |
748 | if (retval) |
749 | return retval; | |
750 | ||
66a4263b | 751 | /* Add MODALIAS= */ |
7eff2e7a | 752 | retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type); |
bf62456e | 753 | |
bf62456e | 754 | return retval; |
1534c382 MS |
755 | } |
756 | ||
772f5472 FB |
757 | static int ap_bus_suspend(struct device *dev, pm_message_t state) |
758 | { | |
759 | struct ap_device *ap_dev = to_ap_dev(dev); | |
760 | unsigned long flags; | |
761 | ||
762 | if (!ap_suspend_flag) { | |
763 | ap_suspend_flag = 1; | |
764 | ||
765 | /* Disable scanning for devices, thus we do not want to scan | |
766 | * for them after removing. | |
767 | */ | |
768 | del_timer_sync(&ap_config_timer); | |
769 | if (ap_work_queue != NULL) { | |
770 | destroy_workqueue(ap_work_queue); | |
771 | ap_work_queue = NULL; | |
772 | } | |
5314af69 | 773 | |
772f5472 FB |
774 | tasklet_disable(&ap_tasklet); |
775 | } | |
776 | /* Poll on the device until all requests are finished. */ | |
777 | do { | |
778 | flags = 0; | |
95f1556c | 779 | spin_lock_bh(&ap_dev->lock); |
772f5472 | 780 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 781 | spin_unlock_bh(&ap_dev->lock); |
772f5472 FB |
782 | } while ((flags & 1) || (flags & 2)); |
783 | ||
5314af69 FB |
784 | spin_lock_bh(&ap_dev->lock); |
785 | ap_dev->unregistered = 1; | |
786 | spin_unlock_bh(&ap_dev->lock); | |
787 | ||
772f5472 FB |
788 | return 0; |
789 | } | |
790 | ||
791 | static int ap_bus_resume(struct device *dev) | |
792 | { | |
772f5472 | 793 | struct ap_device *ap_dev = to_ap_dev(dev); |
f4eae94f | 794 | int rc; |
772f5472 FB |
795 | |
796 | if (ap_suspend_flag) { | |
797 | ap_suspend_flag = 0; | |
f4eae94f MS |
798 | if (ap_interrupts_available()) { |
799 | if (!ap_using_interrupts()) { | |
800 | rc = register_adapter_interrupt(&ap_airq); | |
801 | ap_airq_flag = (rc == 0); | |
802 | } | |
803 | } else { | |
804 | if (ap_using_interrupts()) { | |
805 | unregister_adapter_interrupt(&ap_airq); | |
806 | ap_airq_flag = 0; | |
807 | } | |
808 | } | |
75014550 | 809 | ap_query_configuration(); |
5314af69 FB |
810 | if (!user_set_domain) { |
811 | ap_domain_index = -1; | |
812 | ap_select_domain(); | |
813 | } | |
772f5472 FB |
814 | init_timer(&ap_config_timer); |
815 | ap_config_timer.function = ap_config_timeout; | |
816 | ap_config_timer.data = 0; | |
817 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
818 | add_timer(&ap_config_timer); | |
819 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
820 | if (!ap_work_queue) | |
821 | return -ENOMEM; | |
822 | tasklet_enable(&ap_tasklet); | |
823 | if (!ap_using_interrupts()) | |
824 | ap_schedule_poll_timer(); | |
825 | else | |
826 | tasklet_schedule(&ap_tasklet); | |
827 | if (ap_thread_flag) | |
828 | rc = ap_poll_thread_start(); | |
f4eae94f MS |
829 | else |
830 | rc = 0; | |
831 | } else | |
832 | rc = 0; | |
5314af69 FB |
833 | if (AP_QID_QUEUE(ap_dev->qid) != ap_domain_index) { |
834 | spin_lock_bh(&ap_dev->lock); | |
835 | ap_dev->qid = AP_MKQID(AP_QID_DEVICE(ap_dev->qid), | |
836 | ap_domain_index); | |
837 | spin_unlock_bh(&ap_dev->lock); | |
838 | } | |
839 | queue_work(ap_work_queue, &ap_config_work); | |
772f5472 FB |
840 | |
841 | return rc; | |
842 | } | |
843 | ||
1534c382 MS |
844 | static struct bus_type ap_bus_type = { |
845 | .name = "ap", | |
846 | .match = &ap_bus_match, | |
847 | .uevent = &ap_uevent, | |
772f5472 FB |
848 | .suspend = ap_bus_suspend, |
849 | .resume = ap_bus_resume | |
1534c382 MS |
850 | }; |
851 | ||
852 | static int ap_device_probe(struct device *dev) | |
853 | { | |
854 | struct ap_device *ap_dev = to_ap_dev(dev); | |
855 | struct ap_driver *ap_drv = to_ap_drv(dev->driver); | |
856 | int rc; | |
857 | ||
858 | ap_dev->drv = ap_drv; | |
666e68e0 IT |
859 | |
860 | spin_lock_bh(&ap_device_list_lock); | |
861 | list_add(&ap_dev->list, &ap_device_list); | |
862 | spin_unlock_bh(&ap_device_list_lock); | |
863 | ||
1534c382 | 864 | rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV; |
666e68e0 | 865 | if (rc) { |
43c207e6 | 866 | spin_lock_bh(&ap_device_list_lock); |
666e68e0 | 867 | list_del_init(&ap_dev->list); |
43c207e6 | 868 | spin_unlock_bh(&ap_device_list_lock); |
c50a160c IT |
869 | } else { |
870 | if (ap_dev->reset == AP_RESET_IN_PROGRESS || | |
871 | ap_dev->interrupt == AP_INTR_IN_PROGRESS) | |
872 | __ap_schedule_poll_timer(); | |
faa582ca | 873 | } |
1534c382 MS |
874 | return rc; |
875 | } | |
876 | ||
877 | /** | |
1749a81d FB |
878 | * __ap_flush_queue(): Flush requests. |
879 | * @ap_dev: Pointer to the AP device | |
880 | * | |
1534c382 | 881 | * Flush all requests from the request/pending queue of an AP device. |
1534c382 | 882 | */ |
4d284cac | 883 | static void __ap_flush_queue(struct ap_device *ap_dev) |
1534c382 MS |
884 | { |
885 | struct ap_message *ap_msg, *next; | |
886 | ||
887 | list_for_each_entry_safe(ap_msg, next, &ap_dev->pendingq, list) { | |
888 | list_del_init(&ap_msg->list); | |
889 | ap_dev->pendingq_count--; | |
54a8f561 | 890 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
891 | } |
892 | list_for_each_entry_safe(ap_msg, next, &ap_dev->requestq, list) { | |
893 | list_del_init(&ap_msg->list); | |
894 | ap_dev->requestq_count--; | |
54a8f561 | 895 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
896 | } |
897 | } | |
898 | ||
899 | void ap_flush_queue(struct ap_device *ap_dev) | |
900 | { | |
901 | spin_lock_bh(&ap_dev->lock); | |
902 | __ap_flush_queue(ap_dev); | |
903 | spin_unlock_bh(&ap_dev->lock); | |
904 | } | |
905 | EXPORT_SYMBOL(ap_flush_queue); | |
906 | ||
907 | static int ap_device_remove(struct device *dev) | |
908 | { | |
909 | struct ap_device *ap_dev = to_ap_dev(dev); | |
910 | struct ap_driver *ap_drv = ap_dev->drv; | |
911 | ||
4e56296d | 912 | ap_flush_queue(ap_dev); |
af512ed0 | 913 | del_timer_sync(&ap_dev->timeout); |
43c207e6 | 914 | spin_lock_bh(&ap_device_list_lock); |
cf352ce0 | 915 | list_del_init(&ap_dev->list); |
43c207e6 | 916 | spin_unlock_bh(&ap_device_list_lock); |
faa582ca RW |
917 | if (ap_drv->remove) |
918 | ap_drv->remove(ap_dev); | |
e675c0d2 RW |
919 | spin_lock_bh(&ap_dev->lock); |
920 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); | |
921 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
922 | return 0; |
923 | } | |
924 | ||
925 | int ap_driver_register(struct ap_driver *ap_drv, struct module *owner, | |
926 | char *name) | |
927 | { | |
928 | struct device_driver *drv = &ap_drv->driver; | |
929 | ||
930 | drv->bus = &ap_bus_type; | |
931 | drv->probe = ap_device_probe; | |
932 | drv->remove = ap_device_remove; | |
933 | drv->owner = owner; | |
934 | drv->name = name; | |
935 | return driver_register(drv); | |
936 | } | |
937 | EXPORT_SYMBOL(ap_driver_register); | |
938 | ||
939 | void ap_driver_unregister(struct ap_driver *ap_drv) | |
940 | { | |
941 | driver_unregister(&ap_drv->driver); | |
942 | } | |
943 | EXPORT_SYMBOL(ap_driver_unregister); | |
944 | ||
dabecb29 HD |
945 | void ap_bus_force_rescan(void) |
946 | { | |
56bbe686 IT |
947 | /* reconfigure the AP bus rescan timer. */ |
948 | mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ); | |
949 | /* processing a asynchronous bus rescan */ | |
950 | queue_work(ap_work_queue, &ap_config_work); | |
951 | flush_work(&ap_config_work); | |
dabecb29 HD |
952 | } |
953 | EXPORT_SYMBOL(ap_bus_force_rescan); | |
954 | ||
5bc334bf IT |
955 | /* |
956 | * ap_test_config(): helper function to extract the nrth bit | |
957 | * within the unsigned int array field. | |
958 | */ | |
959 | static inline int ap_test_config(unsigned int *field, unsigned int nr) | |
960 | { | |
961 | if (nr > 0xFFu) | |
962 | return 0; | |
963 | return ap_test_bit((field + (nr >> 5)), (nr & 0x1f)); | |
964 | } | |
965 | ||
966 | /* | |
967 | * ap_test_config_card_id(): Test, whether an AP card ID is configured. | |
968 | * @id AP card ID | |
969 | * | |
970 | * Returns 0 if the card is not configured | |
971 | * 1 if the card is configured or | |
972 | * if the configuration information is not available | |
973 | */ | |
974 | static inline int ap_test_config_card_id(unsigned int id) | |
975 | { | |
976 | if (!ap_configuration) | |
977 | return 1; | |
978 | return ap_test_config(ap_configuration->apm, id); | |
979 | } | |
980 | ||
981 | /* | |
982 | * ap_test_config_domain(): Test, whether an AP usage domain is configured. | |
983 | * @domain AP usage domain ID | |
984 | * | |
985 | * Returns 0 if the usage domain is not configured | |
986 | * 1 if the usage domain is configured or | |
987 | * if the configuration information is not available | |
988 | */ | |
989 | static inline int ap_test_config_domain(unsigned int domain) | |
990 | { | |
ea96f788 IT |
991 | if (!ap_configuration) /* QCI not supported */ |
992 | if (domain < 16) | |
993 | return 1; /* then domains 0...15 are configured */ | |
994 | else | |
995 | return 0; | |
996 | else | |
997 | return ap_test_config(ap_configuration->aqm, domain); | |
5bc334bf IT |
998 | } |
999 | ||
1749a81d | 1000 | /* |
1534c382 MS |
1001 | * AP bus attributes. |
1002 | */ | |
1003 | static ssize_t ap_domain_show(struct bus_type *bus, char *buf) | |
1004 | { | |
1005 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index); | |
1006 | } | |
1007 | ||
1008 | static BUS_ATTR(ap_domain, 0444, ap_domain_show, NULL); | |
1009 | ||
91f3e3ea IT |
1010 | static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf) |
1011 | { | |
1012 | if (ap_configuration != NULL) { /* QCI not supported */ | |
1013 | if (test_facility(76)) { /* format 1 - 256 bit domain field */ | |
1014 | return snprintf(buf, PAGE_SIZE, | |
1015 | "0x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
1016 | ap_configuration->adm[0], ap_configuration->adm[1], | |
1017 | ap_configuration->adm[2], ap_configuration->adm[3], | |
1018 | ap_configuration->adm[4], ap_configuration->adm[5], | |
1019 | ap_configuration->adm[6], ap_configuration->adm[7]); | |
1020 | } else { /* format 0 - 16 bit domain field */ | |
1021 | return snprintf(buf, PAGE_SIZE, "%08x%08x\n", | |
1022 | ap_configuration->adm[0], ap_configuration->adm[1]); | |
1023 | } | |
1024 | } else { | |
1025 | return snprintf(buf, PAGE_SIZE, "not supported\n"); | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | static BUS_ATTR(ap_control_domain_mask, 0444, | |
1030 | ap_control_domain_mask_show, NULL); | |
1031 | ||
1534c382 MS |
1032 | static ssize_t ap_config_time_show(struct bus_type *bus, char *buf) |
1033 | { | |
1034 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time); | |
1035 | } | |
1036 | ||
cb17a636 FB |
1037 | static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf) |
1038 | { | |
1039 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
1040 | ap_using_interrupts() ? 1 : 0); | |
1041 | } | |
1042 | ||
1043 | static BUS_ATTR(ap_interrupts, 0444, ap_interrupts_show, NULL); | |
1044 | ||
1534c382 MS |
1045 | static ssize_t ap_config_time_store(struct bus_type *bus, |
1046 | const char *buf, size_t count) | |
1047 | { | |
1048 | int time; | |
1049 | ||
1050 | if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120) | |
1051 | return -EINVAL; | |
1052 | ap_config_time = time; | |
1053 | if (!timer_pending(&ap_config_timer) || | |
1054 | !mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ)) { | |
1055 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1056 | add_timer(&ap_config_timer); | |
1057 | } | |
1058 | return count; | |
1059 | } | |
1060 | ||
1061 | static BUS_ATTR(config_time, 0644, ap_config_time_show, ap_config_time_store); | |
1062 | ||
1063 | static ssize_t ap_poll_thread_show(struct bus_type *bus, char *buf) | |
1064 | { | |
1065 | return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0); | |
1066 | } | |
1067 | ||
1068 | static ssize_t ap_poll_thread_store(struct bus_type *bus, | |
1069 | const char *buf, size_t count) | |
1070 | { | |
1071 | int flag, rc; | |
1072 | ||
1073 | if (sscanf(buf, "%d\n", &flag) != 1) | |
1074 | return -EINVAL; | |
1075 | if (flag) { | |
1076 | rc = ap_poll_thread_start(); | |
1077 | if (rc) | |
1078 | return rc; | |
1079 | } | |
1080 | else | |
1081 | ap_poll_thread_stop(); | |
1082 | return count; | |
1083 | } | |
1084 | ||
1085 | static BUS_ATTR(poll_thread, 0644, ap_poll_thread_show, ap_poll_thread_store); | |
1086 | ||
fe137230 FB |
1087 | static ssize_t poll_timeout_show(struct bus_type *bus, char *buf) |
1088 | { | |
1089 | return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout); | |
1090 | } | |
1091 | ||
1092 | static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf, | |
1093 | size_t count) | |
1094 | { | |
1095 | unsigned long long time; | |
1096 | ktime_t hr_time; | |
1097 | ||
1098 | /* 120 seconds = maximum poll interval */ | |
cb17a636 FB |
1099 | if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || |
1100 | time > 120000000000ULL) | |
fe137230 FB |
1101 | return -EINVAL; |
1102 | poll_timeout = time; | |
1103 | hr_time = ktime_set(0, poll_timeout); | |
1104 | ||
8cc2af7c IT |
1105 | spin_lock_bh(&ap_poll_timer_lock); |
1106 | hrtimer_cancel(&ap_poll_timer); | |
1107 | hrtimer_set_expires(&ap_poll_timer, hr_time); | |
1108 | hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS); | |
1109 | spin_unlock_bh(&ap_poll_timer_lock); | |
1110 | ||
fe137230 FB |
1111 | return count; |
1112 | } | |
1113 | ||
1114 | static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store); | |
1115 | ||
5bc334bf IT |
1116 | static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf) |
1117 | { | |
6acbe21f | 1118 | struct ap_queue_status status; |
5bc334bf IT |
1119 | ap_qid_t qid; |
1120 | int i, nd, max_domain_id = -1; | |
1121 | unsigned long fbits; | |
1122 | ||
1123 | if (ap_configuration) { | |
1124 | if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS) { | |
1125 | for (i = 0; i < AP_DEVICES; i++) { | |
1126 | if (!ap_test_config_card_id(i)) | |
1127 | continue; | |
1128 | qid = AP_MKQID(i, ap_domain_index); | |
6acbe21f MS |
1129 | status = ap_test_queue(qid, &fbits); |
1130 | if (status.response_code != AP_RESPONSE_NORMAL) | |
1131 | continue; | |
5bc334bf IT |
1132 | if (fbits & (1UL << 57)) { |
1133 | /* the N bit is 0, Nd field is filled */ | |
1134 | nd = (int)((fbits & 0x00FF0000UL)>>16); | |
1135 | if (nd > 0) | |
1136 | max_domain_id = nd; | |
1137 | else | |
1138 | max_domain_id = 15; | |
1139 | } else { | |
1140 | /* N bit is 1, max 16 domains */ | |
1141 | max_domain_id = 15; | |
1142 | } | |
1143 | break; | |
1144 | } | |
1145 | } | |
1146 | } else { | |
1147 | /* no APXA support, older machines with max 16 domains */ | |
1148 | max_domain_id = 15; | |
1149 | } | |
1150 | return snprintf(buf, PAGE_SIZE, "%d\n", max_domain_id); | |
1151 | } | |
1152 | ||
1153 | static BUS_ATTR(ap_max_domain_id, 0444, ap_max_domain_id_show, NULL); | |
1154 | ||
1534c382 MS |
1155 | static struct bus_attribute *const ap_bus_attrs[] = { |
1156 | &bus_attr_ap_domain, | |
91f3e3ea | 1157 | &bus_attr_ap_control_domain_mask, |
1534c382 MS |
1158 | &bus_attr_config_time, |
1159 | &bus_attr_poll_thread, | |
cb17a636 | 1160 | &bus_attr_ap_interrupts, |
fe137230 | 1161 | &bus_attr_poll_timeout, |
5bc334bf | 1162 | &bus_attr_ap_max_domain_id, |
fe137230 | 1163 | NULL, |
1534c382 MS |
1164 | }; |
1165 | ||
75014550 HD |
1166 | /** |
1167 | * ap_query_configuration(): Query AP configuration information. | |
1168 | * | |
1169 | * Query information of installed cards and configured domains from AP. | |
1170 | */ | |
1171 | static void ap_query_configuration(void) | |
1172 | { | |
75014550 HD |
1173 | if (ap_configuration_available()) { |
1174 | if (!ap_configuration) | |
1175 | ap_configuration = | |
1176 | kzalloc(sizeof(struct ap_config_info), | |
1177 | GFP_KERNEL); | |
1178 | if (ap_configuration) | |
1179 | __ap_query_configuration(ap_configuration); | |
1180 | } else | |
1181 | ap_configuration = NULL; | |
75014550 HD |
1182 | } |
1183 | ||
1534c382 | 1184 | /** |
1749a81d FB |
1185 | * ap_select_domain(): Select an AP domain. |
1186 | * | |
1187 | * Pick one of the 16 AP domains. | |
1534c382 | 1188 | */ |
4d284cac | 1189 | static int ap_select_domain(void) |
1534c382 | 1190 | { |
6acbe21f MS |
1191 | int count, max_count, best_domain; |
1192 | struct ap_queue_status status; | |
1193 | int i, j; | |
1534c382 | 1194 | |
170387a8 IT |
1195 | /* IF APXA isn't installed, only 16 domains could be defined */ |
1196 | if (!ap_configuration->ap_extended && (ap_domain_index > 15)) | |
1197 | return -EINVAL; | |
1198 | ||
1749a81d | 1199 | /* |
1534c382 MS |
1200 | * We want to use a single domain. Either the one specified with |
1201 | * the "domain=" parameter or the domain with the maximum number | |
1202 | * of devices. | |
1203 | */ | |
1204 | if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS) | |
1205 | /* Domain has already been selected. */ | |
1206 | return 0; | |
1207 | best_domain = -1; | |
1208 | max_count = 0; | |
1209 | for (i = 0; i < AP_DOMAINS; i++) { | |
75014550 HD |
1210 | if (!ap_test_config_domain(i)) |
1211 | continue; | |
1534c382 MS |
1212 | count = 0; |
1213 | for (j = 0; j < AP_DEVICES; j++) { | |
75014550 HD |
1214 | if (!ap_test_config_card_id(j)) |
1215 | continue; | |
6acbe21f MS |
1216 | status = ap_test_queue(AP_MKQID(j, i), NULL); |
1217 | if (status.response_code != AP_RESPONSE_NORMAL) | |
1534c382 MS |
1218 | continue; |
1219 | count++; | |
1220 | } | |
1221 | if (count > max_count) { | |
1222 | max_count = count; | |
1223 | best_domain = i; | |
1224 | } | |
1225 | } | |
1226 | if (best_domain >= 0){ | |
1227 | ap_domain_index = best_domain; | |
1228 | return 0; | |
1229 | } | |
1230 | return -ENODEV; | |
1231 | } | |
1232 | ||
1233 | /** | |
1749a81d | 1234 | * ap_probe_device_type(): Find the device type of an AP. |
1534c382 | 1235 | * @ap_dev: pointer to the AP device. |
1749a81d FB |
1236 | * |
1237 | * Find the device type if query queue returned a device type of 0. | |
1534c382 MS |
1238 | */ |
1239 | static int ap_probe_device_type(struct ap_device *ap_dev) | |
1240 | { | |
1241 | static unsigned char msg[] = { | |
1242 | 0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00, | |
1243 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1244 | 0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00, | |
1245 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1246 | 0x01,0x00,0x43,0x43,0x41,0x2d,0x41,0x50, | |
1247 | 0x50,0x4c,0x20,0x20,0x20,0x01,0x01,0x01, | |
1248 | 0x00,0x00,0x00,0x00,0x50,0x4b,0x00,0x00, | |
1249 | 0x00,0x00,0x01,0x1c,0x00,0x00,0x00,0x00, | |
1250 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1251 | 0x00,0x00,0x05,0xb8,0x00,0x00,0x00,0x00, | |
1252 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1253 | 0x70,0x00,0x41,0x00,0x00,0x00,0x00,0x00, | |
1254 | 0x00,0x00,0x54,0x32,0x01,0x00,0xa0,0x00, | |
1255 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1256 | 0x00,0x00,0x00,0x00,0xb8,0x05,0x00,0x00, | |
1257 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1258 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1259 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1260 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1261 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1262 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1263 | 0x00,0x00,0x0a,0x00,0x00,0x00,0x00,0x00, | |
1264 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, | |
1265 | 0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00, | |
1266 | 0x49,0x43,0x53,0x46,0x20,0x20,0x20,0x20, | |
1267 | 0x50,0x4b,0x0a,0x00,0x50,0x4b,0x43,0x53, | |
1268 | 0x2d,0x31,0x2e,0x32,0x37,0x00,0x11,0x22, | |
1269 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1270 | 0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88, | |
1271 | 0x99,0x00,0x11,0x22,0x33,0x44,0x55,0x66, | |
1272 | 0x77,0x88,0x99,0x00,0x11,0x22,0x33,0x44, | |
1273 | 0x55,0x66,0x77,0x88,0x99,0x00,0x11,0x22, | |
1274 | 0x33,0x44,0x55,0x66,0x77,0x88,0x99,0x00, | |
1275 | 0x11,0x22,0x33,0x5d,0x00,0x5b,0x00,0x77, | |
1276 | 0x88,0x1e,0x00,0x00,0x57,0x00,0x00,0x00, | |
1277 | 0x00,0x04,0x00,0x00,0x4f,0x00,0x00,0x00, | |
1278 | 0x03,0x02,0x00,0x00,0x40,0x01,0x00,0x01, | |
1279 | 0xce,0x02,0x68,0x2d,0x5f,0xa9,0xde,0x0c, | |
1280 | 0xf6,0xd2,0x7b,0x58,0x4b,0xf9,0x28,0x68, | |
1281 | 0x3d,0xb4,0xf4,0xef,0x78,0xd5,0xbe,0x66, | |
1282 | 0x63,0x42,0xef,0xf8,0xfd,0xa4,0xf8,0xb0, | |
1283 | 0x8e,0x29,0xc2,0xc9,0x2e,0xd8,0x45,0xb8, | |
1284 | 0x53,0x8c,0x6f,0x4e,0x72,0x8f,0x6c,0x04, | |
1285 | 0x9c,0x88,0xfc,0x1e,0xc5,0x83,0x55,0x57, | |
1286 | 0xf7,0xdd,0xfd,0x4f,0x11,0x36,0x95,0x5d, | |
1287 | }; | |
1288 | struct ap_queue_status status; | |
1289 | unsigned long long psmid; | |
1290 | char *reply; | |
1291 | int rc, i; | |
1292 | ||
1293 | reply = (void *) get_zeroed_page(GFP_KERNEL); | |
1294 | if (!reply) { | |
1295 | rc = -ENOMEM; | |
1296 | goto out; | |
1297 | } | |
1298 | ||
1299 | status = __ap_send(ap_dev->qid, 0x0102030405060708ULL, | |
a6a5d73a | 1300 | msg, sizeof(msg), 0); |
1534c382 MS |
1301 | if (status.response_code != AP_RESPONSE_NORMAL) { |
1302 | rc = -ENODEV; | |
1303 | goto out_free; | |
1304 | } | |
1305 | ||
1306 | /* Wait for the test message to complete. */ | |
1307 | for (i = 0; i < 6; i++) { | |
e4e1899a | 1308 | msleep(300); |
1534c382 MS |
1309 | status = __ap_recv(ap_dev->qid, &psmid, reply, 4096); |
1310 | if (status.response_code == AP_RESPONSE_NORMAL && | |
1311 | psmid == 0x0102030405060708ULL) | |
1312 | break; | |
1313 | } | |
1314 | if (i < 6) { | |
1315 | /* Got an answer. */ | |
1316 | if (reply[0] == 0x00 && reply[1] == 0x86) | |
1317 | ap_dev->device_type = AP_DEVICE_TYPE_PCICC; | |
1318 | else | |
1319 | ap_dev->device_type = AP_DEVICE_TYPE_PCICA; | |
1320 | rc = 0; | |
1321 | } else | |
1322 | rc = -ENODEV; | |
1323 | ||
1324 | out_free: | |
1325 | free_page((unsigned long) reply); | |
1326 | out: | |
1327 | return rc; | |
1328 | } | |
1329 | ||
f4eae94f | 1330 | static void ap_interrupt_handler(struct airq_struct *airq) |
cb17a636 | 1331 | { |
420f42ec | 1332 | inc_irq_stat(IRQIO_APB); |
cb17a636 FB |
1333 | tasklet_schedule(&ap_tasklet); |
1334 | } | |
1335 | ||
1534c382 | 1336 | /** |
1749a81d FB |
1337 | * __ap_scan_bus(): Scan the AP bus. |
1338 | * @dev: Pointer to device | |
1339 | * @data: Pointer to data | |
1340 | * | |
1341 | * Scan the AP bus for new devices. | |
1534c382 MS |
1342 | */ |
1343 | static int __ap_scan_bus(struct device *dev, void *data) | |
1344 | { | |
1345 | return to_ap_dev(dev)->qid == (ap_qid_t)(unsigned long) data; | |
1346 | } | |
1347 | ||
1348 | static void ap_device_release(struct device *dev) | |
1349 | { | |
1350 | struct ap_device *ap_dev = to_ap_dev(dev); | |
1351 | ||
1352 | kfree(ap_dev); | |
1353 | } | |
1354 | ||
4927b3f7 | 1355 | static void ap_scan_bus(struct work_struct *unused) |
1534c382 MS |
1356 | { |
1357 | struct ap_device *ap_dev; | |
1358 | struct device *dev; | |
1359 | ap_qid_t qid; | |
c50a160c | 1360 | int queue_depth = 0, device_type = 0; |
6bed05bc | 1361 | unsigned int device_functions; |
1534c382 MS |
1362 | int rc, i; |
1363 | ||
75014550 | 1364 | ap_query_configuration(); |
56bbe686 | 1365 | if (ap_select_domain() != 0) { |
1534c382 | 1366 | return; |
56bbe686 | 1367 | } |
1534c382 MS |
1368 | for (i = 0; i < AP_DEVICES; i++) { |
1369 | qid = AP_MKQID(i, ap_domain_index); | |
1370 | dev = bus_find_device(&ap_bus_type, NULL, | |
1371 | (void *)(unsigned long)qid, | |
1372 | __ap_scan_bus); | |
75014550 | 1373 | if (ap_test_config_card_id(i)) |
6acbe21f MS |
1374 | rc = ap_query_queue(qid, &queue_depth, &device_type, |
1375 | &device_functions); | |
75014550 HD |
1376 | else |
1377 | rc = -ENODEV; | |
c6a48264 RW |
1378 | if (dev) { |
1379 | ap_dev = to_ap_dev(dev); | |
1380 | spin_lock_bh(&ap_dev->lock); | |
c50a160c | 1381 | if (rc == -ENODEV || ap_dev->unregistered) { |
c6a48264 | 1382 | spin_unlock_bh(&ap_dev->lock); |
5314af69 FB |
1383 | if (ap_dev->unregistered) |
1384 | i--; | |
c6a48264 | 1385 | device_unregister(dev); |
af512ed0 | 1386 | put_device(dev); |
c6a48264 | 1387 | continue; |
af512ed0 RW |
1388 | } |
1389 | spin_unlock_bh(&ap_dev->lock); | |
1534c382 MS |
1390 | put_device(dev); |
1391 | continue; | |
1392 | } | |
1534c382 MS |
1393 | if (rc) |
1394 | continue; | |
1395 | ap_dev = kzalloc(sizeof(*ap_dev), GFP_KERNEL); | |
1396 | if (!ap_dev) | |
1397 | break; | |
1398 | ap_dev->qid = qid; | |
c50a160c IT |
1399 | rc = ap_init_queue(ap_dev); |
1400 | if ((rc != 0) && (rc != -EBUSY)) { | |
1401 | kfree(ap_dev); | |
1402 | continue; | |
1403 | } | |
1534c382 | 1404 | ap_dev->queue_depth = queue_depth; |
6acbe21f MS |
1405 | ap_dev->raw_hwtype = device_type; |
1406 | ap_dev->device_type = device_type; | |
1407 | ap_dev->functions = device_functions; | |
4e56296d | 1408 | ap_dev->unregistered = 1; |
1534c382 MS |
1409 | spin_lock_init(&ap_dev->lock); |
1410 | INIT_LIST_HEAD(&ap_dev->pendingq); | |
1411 | INIT_LIST_HEAD(&ap_dev->requestq); | |
cf352ce0 | 1412 | INIT_LIST_HEAD(&ap_dev->list); |
af512ed0 RW |
1413 | setup_timer(&ap_dev->timeout, ap_request_timeout, |
1414 | (unsigned long) ap_dev); | |
6acbe21f | 1415 | if (ap_dev->device_type == 0) |
1e2076f4 | 1416 | /* device type probing for old cards */ |
cf2d007b HD |
1417 | if (ap_probe_device_type(ap_dev)) { |
1418 | kfree(ap_dev); | |
1419 | continue; | |
1420 | } | |
1e2076f4 | 1421 | |
1534c382 MS |
1422 | ap_dev->device.bus = &ap_bus_type; |
1423 | ap_dev->device.parent = ap_root_device; | |
edc44fa0 FB |
1424 | if (dev_set_name(&ap_dev->device, "card%02x", |
1425 | AP_QID_DEVICE(ap_dev->qid))) { | |
1426 | kfree(ap_dev); | |
1427 | continue; | |
1428 | } | |
1534c382 MS |
1429 | ap_dev->device.release = ap_device_release; |
1430 | rc = device_register(&ap_dev->device); | |
1431 | if (rc) { | |
c6304933 | 1432 | put_device(&ap_dev->device); |
1534c382 MS |
1433 | continue; |
1434 | } | |
1435 | /* Add device attributes. */ | |
1436 | rc = sysfs_create_group(&ap_dev->device.kobj, | |
1437 | &ap_dev_attr_group); | |
4e56296d RW |
1438 | if (!rc) { |
1439 | spin_lock_bh(&ap_dev->lock); | |
1440 | ap_dev->unregistered = 0; | |
1441 | spin_unlock_bh(&ap_dev->lock); | |
1442 | } | |
1443 | else | |
1534c382 MS |
1444 | device_unregister(&ap_dev->device); |
1445 | } | |
1446 | } | |
1447 | ||
1448 | static void | |
1449 | ap_config_timeout(unsigned long ptr) | |
1450 | { | |
1451 | queue_work(ap_work_queue, &ap_config_work); | |
1452 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1453 | add_timer(&ap_config_timer); | |
1454 | } | |
1455 | ||
1534c382 | 1456 | /** |
1749a81d | 1457 | * ap_poll_read(): Receive pending reply messages from an AP device. |
1534c382 MS |
1458 | * @ap_dev: pointer to the AP device |
1459 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1460 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1461 | * |
1534c382 MS |
1462 | * Returns 0 if the device is still present, -ENODEV if not. |
1463 | */ | |
4d284cac | 1464 | static int ap_poll_read(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1465 | { |
1466 | struct ap_queue_status status; | |
1467 | struct ap_message *ap_msg; | |
1468 | ||
1469 | if (ap_dev->queue_count <= 0) | |
1470 | return 0; | |
1471 | status = __ap_recv(ap_dev->qid, &ap_dev->reply->psmid, | |
1472 | ap_dev->reply->message, ap_dev->reply->length); | |
1473 | switch (status.response_code) { | |
1474 | case AP_RESPONSE_NORMAL: | |
c50a160c | 1475 | ap_dev->interrupt = status.int_enabled; |
1534c382 | 1476 | atomic_dec(&ap_poll_requests); |
af512ed0 | 1477 | ap_decrease_queue_count(ap_dev); |
1534c382 MS |
1478 | list_for_each_entry(ap_msg, &ap_dev->pendingq, list) { |
1479 | if (ap_msg->psmid != ap_dev->reply->psmid) | |
1480 | continue; | |
1481 | list_del_init(&ap_msg->list); | |
1482 | ap_dev->pendingq_count--; | |
54a8f561 | 1483 | ap_msg->receive(ap_dev, ap_msg, ap_dev->reply); |
1534c382 MS |
1484 | break; |
1485 | } | |
1486 | if (ap_dev->queue_count > 0) | |
1487 | *flags |= 1; | |
1488 | break; | |
1489 | case AP_RESPONSE_NO_PENDING_REPLY: | |
c50a160c | 1490 | ap_dev->interrupt = status.int_enabled; |
1534c382 MS |
1491 | if (status.queue_empty) { |
1492 | /* The card shouldn't forget requests but who knows. */ | |
e675c0d2 | 1493 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); |
1534c382 MS |
1494 | ap_dev->queue_count = 0; |
1495 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1496 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1497 | ap_dev->pendingq_count = 0; | |
1498 | } else | |
1499 | *flags |= 2; | |
1500 | break; | |
1501 | default: | |
1502 | return -ENODEV; | |
1503 | } | |
1504 | return 0; | |
1505 | } | |
1506 | ||
1507 | /** | |
1749a81d | 1508 | * ap_poll_write(): Send messages from the request queue to an AP device. |
1534c382 MS |
1509 | * @ap_dev: pointer to the AP device |
1510 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1511 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d | 1512 | * |
1534c382 MS |
1513 | * Returns 0 if the device is still present, -ENODEV if not. |
1514 | */ | |
4d284cac | 1515 | static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 MS |
1516 | { |
1517 | struct ap_queue_status status; | |
1518 | struct ap_message *ap_msg; | |
1519 | ||
1520 | if (ap_dev->requestq_count <= 0 || | |
c50a160c IT |
1521 | (ap_dev->queue_count >= ap_dev->queue_depth) || |
1522 | (ap_dev->reset == AP_RESET_IN_PROGRESS)) | |
1534c382 MS |
1523 | return 0; |
1524 | /* Start the next request on the queue. */ | |
1525 | ap_msg = list_entry(ap_dev->requestq.next, struct ap_message, list); | |
1526 | status = __ap_send(ap_dev->qid, ap_msg->psmid, | |
a6a5d73a | 1527 | ap_msg->message, ap_msg->length, ap_msg->special); |
1534c382 MS |
1528 | switch (status.response_code) { |
1529 | case AP_RESPONSE_NORMAL: | |
1530 | atomic_inc(&ap_poll_requests); | |
af512ed0 | 1531 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1532 | list_move_tail(&ap_msg->list, &ap_dev->pendingq); |
1533 | ap_dev->requestq_count--; | |
1534 | ap_dev->pendingq_count++; | |
1535 | if (ap_dev->queue_count < ap_dev->queue_depth && | |
1536 | ap_dev->requestq_count > 0) | |
1537 | *flags |= 1; | |
1538 | *flags |= 2; | |
1539 | break; | |
af512ed0 | 1540 | case AP_RESPONSE_RESET_IN_PROGRESS: |
bc615dea HD |
1541 | __ap_schedule_poll_timer(); |
1542 | case AP_RESPONSE_Q_FULL: | |
1534c382 MS |
1543 | *flags |= 2; |
1544 | break; | |
1545 | case AP_RESPONSE_MESSAGE_TOO_BIG: | |
a6a5d73a | 1546 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 MS |
1547 | return -EINVAL; |
1548 | default: | |
1549 | return -ENODEV; | |
1550 | } | |
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | /** | |
1749a81d | 1555 | * ap_poll_queue(): Poll AP device for pending replies and send new messages. |
c50a160c IT |
1556 | * Check if the queue has a pending reset. In case it's done re-enable |
1557 | * interrupts, otherwise reschedule the poll_timer for another attempt. | |
1534c382 MS |
1558 | * @ap_dev: pointer to the bus device |
1559 | * @flags: pointer to control flags, bit 2^0 is set if another poll is | |
1560 | * required, bit 2^1 is set if the poll timer needs to get armed | |
1749a81d FB |
1561 | * |
1562 | * Poll AP device for pending replies and send new messages. If either | |
1563 | * ap_poll_read or ap_poll_write returns -ENODEV unregister the device. | |
1534c382 MS |
1564 | * Returns 0. |
1565 | */ | |
1566 | static inline int ap_poll_queue(struct ap_device *ap_dev, unsigned long *flags) | |
1567 | { | |
c50a160c | 1568 | struct ap_queue_status status; |
6acbe21f | 1569 | int rc; |
c50a160c IT |
1570 | |
1571 | if (ap_dev->reset == AP_RESET_IN_PROGRESS) { | |
6acbe21f | 1572 | status = ap_test_queue(ap_dev->qid, NULL); |
c50a160c IT |
1573 | switch (status.response_code) { |
1574 | case AP_RESPONSE_NORMAL: | |
1575 | ap_dev->reset = AP_RESET_IGNORE; | |
1576 | if (ap_using_interrupts()) { | |
1577 | rc = ap_queue_enable_interruption( | |
1578 | ap_dev, ap_airq.lsi_ptr); | |
1579 | if (!rc) | |
1580 | ap_dev->interrupt = AP_INTR_IN_PROGRESS; | |
1581 | else if (rc == -ENODEV) { | |
1582 | pr_err("Registering adapter interrupts for " | |
1583 | "AP %d failed\n", AP_QID_DEVICE(ap_dev->qid)); | |
1584 | return rc; | |
1585 | } | |
1586 | } | |
1587 | /* fall through */ | |
1588 | case AP_RESPONSE_BUSY: | |
1589 | case AP_RESPONSE_RESET_IN_PROGRESS: | |
1590 | *flags |= AP_POLL_AFTER_TIMEOUT; | |
1591 | break; | |
1592 | case AP_RESPONSE_Q_NOT_AVAIL: | |
1593 | case AP_RESPONSE_DECONFIGURED: | |
1594 | case AP_RESPONSE_CHECKSTOPPED: | |
1595 | return -ENODEV; | |
1596 | default: | |
1597 | break; | |
1598 | } | |
1599 | } | |
1600 | ||
1601 | if ((ap_dev->reset != AP_RESET_IN_PROGRESS) && | |
1602 | (ap_dev->interrupt == AP_INTR_IN_PROGRESS)) { | |
6acbe21f | 1603 | status = ap_test_queue(ap_dev->qid, NULL); |
c50a160c IT |
1604 | if (ap_using_interrupts()) { |
1605 | if (status.int_enabled == 1) | |
1606 | ap_dev->interrupt = AP_INTR_ENABLED; | |
1607 | else | |
1608 | *flags |= AP_POLL_AFTER_TIMEOUT; | |
1609 | } else | |
1610 | ap_dev->interrupt = AP_INTR_DISABLED; | |
1611 | } | |
1534c382 MS |
1612 | |
1613 | rc = ap_poll_read(ap_dev, flags); | |
1614 | if (rc) | |
1615 | return rc; | |
1616 | return ap_poll_write(ap_dev, flags); | |
1617 | } | |
1618 | ||
1619 | /** | |
1749a81d | 1620 | * __ap_queue_message(): Queue a message to a device. |
1534c382 MS |
1621 | * @ap_dev: pointer to the AP device |
1622 | * @ap_msg: the message to be queued | |
1749a81d FB |
1623 | * |
1624 | * Queue a message to a device. Returns 0 if successful. | |
1534c382 MS |
1625 | */ |
1626 | static int __ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1627 | { | |
1628 | struct ap_queue_status status; | |
1629 | ||
1630 | if (list_empty(&ap_dev->requestq) && | |
c50a160c IT |
1631 | (ap_dev->queue_count < ap_dev->queue_depth) && |
1632 | (ap_dev->reset != AP_RESET_IN_PROGRESS)) { | |
1534c382 | 1633 | status = __ap_send(ap_dev->qid, ap_msg->psmid, |
a6a5d73a FB |
1634 | ap_msg->message, ap_msg->length, |
1635 | ap_msg->special); | |
1534c382 MS |
1636 | switch (status.response_code) { |
1637 | case AP_RESPONSE_NORMAL: | |
1638 | list_add_tail(&ap_msg->list, &ap_dev->pendingq); | |
1639 | atomic_inc(&ap_poll_requests); | |
1640 | ap_dev->pendingq_count++; | |
af512ed0 | 1641 | ap_increase_queue_count(ap_dev); |
1534c382 MS |
1642 | ap_dev->total_request_count++; |
1643 | break; | |
1644 | case AP_RESPONSE_Q_FULL: | |
af512ed0 | 1645 | case AP_RESPONSE_RESET_IN_PROGRESS: |
1534c382 MS |
1646 | list_add_tail(&ap_msg->list, &ap_dev->requestq); |
1647 | ap_dev->requestq_count++; | |
1648 | ap_dev->total_request_count++; | |
1649 | return -EBUSY; | |
a6a5d73a | 1650 | case AP_RESPONSE_REQ_FAC_NOT_INST: |
1534c382 | 1651 | case AP_RESPONSE_MESSAGE_TOO_BIG: |
54a8f561 | 1652 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-EINVAL)); |
1534c382 MS |
1653 | return -EINVAL; |
1654 | default: /* Device is gone. */ | |
54a8f561 | 1655 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
1534c382 MS |
1656 | return -ENODEV; |
1657 | } | |
1658 | } else { | |
1659 | list_add_tail(&ap_msg->list, &ap_dev->requestq); | |
1660 | ap_dev->requestq_count++; | |
1661 | ap_dev->total_request_count++; | |
1662 | return -EBUSY; | |
1663 | } | |
1664 | ap_schedule_poll_timer(); | |
1665 | return 0; | |
1666 | } | |
1667 | ||
1668 | void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1669 | { | |
1670 | unsigned long flags; | |
1671 | int rc; | |
1672 | ||
54a8f561 HD |
1673 | /* For asynchronous message handling a valid receive-callback |
1674 | * is required. */ | |
1675 | BUG_ON(!ap_msg->receive); | |
1676 | ||
1534c382 MS |
1677 | spin_lock_bh(&ap_dev->lock); |
1678 | if (!ap_dev->unregistered) { | |
1679 | /* Make room on the queue by polling for finished requests. */ | |
1680 | rc = ap_poll_queue(ap_dev, &flags); | |
1681 | if (!rc) | |
1682 | rc = __ap_queue_message(ap_dev, ap_msg); | |
1683 | if (!rc) | |
1684 | wake_up(&ap_poll_wait); | |
4e56296d RW |
1685 | if (rc == -ENODEV) |
1686 | ap_dev->unregistered = 1; | |
1534c382 | 1687 | } else { |
54a8f561 | 1688 | ap_msg->receive(ap_dev, ap_msg, ERR_PTR(-ENODEV)); |
c6a48264 | 1689 | rc = -ENODEV; |
1534c382 MS |
1690 | } |
1691 | spin_unlock_bh(&ap_dev->lock); | |
1692 | if (rc == -ENODEV) | |
1693 | device_unregister(&ap_dev->device); | |
1694 | } | |
1695 | EXPORT_SYMBOL(ap_queue_message); | |
1696 | ||
1697 | /** | |
1749a81d FB |
1698 | * ap_cancel_message(): Cancel a crypto request. |
1699 | * @ap_dev: The AP device that has the message queued | |
1700 | * @ap_msg: The message that is to be removed | |
1701 | * | |
1534c382 | 1702 | * Cancel a crypto request. This is done by removing the request |
1749a81d | 1703 | * from the device pending or request queue. Note that the |
1534c382 MS |
1704 | * request stays on the AP queue. When it finishes the message |
1705 | * reply will be discarded because the psmid can't be found. | |
1534c382 MS |
1706 | */ |
1707 | void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg) | |
1708 | { | |
1709 | struct ap_message *tmp; | |
1710 | ||
1711 | spin_lock_bh(&ap_dev->lock); | |
1712 | if (!list_empty(&ap_msg->list)) { | |
1713 | list_for_each_entry(tmp, &ap_dev->pendingq, list) | |
1714 | if (tmp->psmid == ap_msg->psmid) { | |
1715 | ap_dev->pendingq_count--; | |
1716 | goto found; | |
1717 | } | |
1718 | ap_dev->requestq_count--; | |
1719 | found: | |
1720 | list_del_init(&ap_msg->list); | |
1721 | } | |
1722 | spin_unlock_bh(&ap_dev->lock); | |
1723 | } | |
1724 | EXPORT_SYMBOL(ap_cancel_message); | |
1725 | ||
1726 | /** | |
1749a81d | 1727 | * ap_poll_timeout(): AP receive polling for finished AP requests. |
fe137230 | 1728 | * @unused: Unused pointer. |
1749a81d | 1729 | * |
fe137230 | 1730 | * Schedules the AP tasklet using a high resolution timer. |
1534c382 | 1731 | */ |
fe137230 | 1732 | static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused) |
1534c382 MS |
1733 | { |
1734 | tasklet_schedule(&ap_tasklet); | |
fe137230 | 1735 | return HRTIMER_NORESTART; |
1534c382 MS |
1736 | } |
1737 | ||
af512ed0 | 1738 | /** |
1749a81d FB |
1739 | * ap_reset(): Reset a not responding AP device. |
1740 | * @ap_dev: Pointer to the AP device | |
1741 | * | |
af512ed0 RW |
1742 | * Reset a not responding AP device and move all requests from the |
1743 | * pending queue to the request queue. | |
1744 | */ | |
c50a160c | 1745 | static void ap_reset(struct ap_device *ap_dev, unsigned long *flags) |
af512ed0 RW |
1746 | { |
1747 | int rc; | |
1748 | ||
af512ed0 RW |
1749 | atomic_sub(ap_dev->queue_count, &ap_poll_requests); |
1750 | ap_dev->queue_count = 0; | |
1751 | list_splice_init(&ap_dev->pendingq, &ap_dev->requestq); | |
1752 | ap_dev->requestq_count += ap_dev->pendingq_count; | |
1753 | ap_dev->pendingq_count = 0; | |
c50a160c | 1754 | rc = ap_init_queue(ap_dev); |
af512ed0 RW |
1755 | if (rc == -ENODEV) |
1756 | ap_dev->unregistered = 1; | |
75464960 | 1757 | else |
c50a160c | 1758 | *flags |= AP_POLL_AFTER_TIMEOUT; |
af512ed0 RW |
1759 | } |
1760 | ||
43c207e6 | 1761 | static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags) |
1534c382 | 1762 | { |
1534c382 | 1763 | if (!ap_dev->unregistered) { |
c6a48264 | 1764 | if (ap_poll_queue(ap_dev, flags)) |
4e56296d | 1765 | ap_dev->unregistered = 1; |
af512ed0 | 1766 | if (ap_dev->reset == AP_RESET_DO) |
c50a160c | 1767 | ap_reset(ap_dev, flags); |
c6a48264 | 1768 | } |
1534c382 MS |
1769 | return 0; |
1770 | } | |
1771 | ||
1749a81d FB |
1772 | /** |
1773 | * ap_poll_all(): Poll all AP devices. | |
1774 | * @dummy: Unused variable | |
1775 | * | |
1776 | * Poll all AP devices on the bus in a round robin fashion. Continue | |
1777 | * polling until bit 2^0 of the control flags is not set. If bit 2^1 | |
1778 | * of the control flags has been set arm the poll timer. | |
1779 | */ | |
1534c382 MS |
1780 | static void ap_poll_all(unsigned long dummy) |
1781 | { | |
1782 | unsigned long flags; | |
cf352ce0 | 1783 | struct ap_device *ap_dev; |
1534c382 | 1784 | |
cb17a636 FB |
1785 | /* Reset the indicator if interrupts are used. Thus new interrupts can |
1786 | * be received. Doing it in the beginning of the tasklet is therefor | |
1787 | * important that no requests on any AP get lost. | |
1788 | */ | |
1789 | if (ap_using_interrupts()) | |
f4eae94f | 1790 | xchg(ap_airq.lsi_ptr, 0); |
1534c382 MS |
1791 | do { |
1792 | flags = 0; | |
43c207e6 | 1793 | spin_lock(&ap_device_list_lock); |
cf352ce0 | 1794 | list_for_each_entry(ap_dev, &ap_device_list, list) { |
95f1556c | 1795 | spin_lock(&ap_dev->lock); |
43c207e6 | 1796 | __ap_poll_device(ap_dev, &flags); |
95f1556c | 1797 | spin_unlock(&ap_dev->lock); |
cf352ce0 | 1798 | } |
43c207e6 | 1799 | spin_unlock(&ap_device_list_lock); |
c50a160c IT |
1800 | } while (flags & AP_POLL_IMMEDIATELY); |
1801 | if (flags & AP_POLL_AFTER_TIMEOUT) | |
1802 | __ap_schedule_poll_timer(); | |
1534c382 MS |
1803 | } |
1804 | ||
1805 | /** | |
1749a81d FB |
1806 | * ap_poll_thread(): Thread that polls for finished requests. |
1807 | * @data: Unused pointer | |
1808 | * | |
1534c382 MS |
1809 | * AP bus poll thread. The purpose of this thread is to poll for |
1810 | * finished requests in a loop if there is a "free" cpu - that is | |
1811 | * a cpu that doesn't have anything better to do. The polling stops | |
1812 | * as soon as there is another task or if all messages have been | |
1813 | * delivered. | |
1814 | */ | |
1815 | static int ap_poll_thread(void *data) | |
1816 | { | |
1817 | DECLARE_WAITQUEUE(wait, current); | |
1818 | unsigned long flags; | |
1819 | int requests; | |
cf352ce0 | 1820 | struct ap_device *ap_dev; |
1534c382 | 1821 | |
8698a745 | 1822 | set_user_nice(current, MAX_NICE); |
1534c382 | 1823 | while (1) { |
772f5472 FB |
1824 | if (ap_suspend_flag) |
1825 | return 0; | |
1534c382 MS |
1826 | if (need_resched()) { |
1827 | schedule(); | |
1828 | continue; | |
1829 | } | |
1830 | add_wait_queue(&ap_poll_wait, &wait); | |
1831 | set_current_state(TASK_INTERRUPTIBLE); | |
1832 | if (kthread_should_stop()) | |
1833 | break; | |
1834 | requests = atomic_read(&ap_poll_requests); | |
1835 | if (requests <= 0) | |
1836 | schedule(); | |
1837 | set_current_state(TASK_RUNNING); | |
1838 | remove_wait_queue(&ap_poll_wait, &wait); | |
1839 | ||
1534c382 | 1840 | flags = 0; |
43c207e6 | 1841 | spin_lock_bh(&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_bh(&ap_device_list_lock); |
1534c382 MS |
1848 | } |
1849 | set_current_state(TASK_RUNNING); | |
1850 | remove_wait_queue(&ap_poll_wait, &wait); | |
1851 | return 0; | |
1852 | } | |
1853 | ||
1854 | static int ap_poll_thread_start(void) | |
1855 | { | |
1856 | int rc; | |
1857 | ||
772f5472 | 1858 | if (ap_using_interrupts() || ap_suspend_flag) |
cb17a636 | 1859 | return 0; |
1534c382 MS |
1860 | mutex_lock(&ap_poll_thread_mutex); |
1861 | if (!ap_poll_kthread) { | |
1862 | ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll"); | |
ba8da213 | 1863 | rc = PTR_RET(ap_poll_kthread); |
1534c382 MS |
1864 | if (rc) |
1865 | ap_poll_kthread = NULL; | |
1866 | } | |
1867 | else | |
1868 | rc = 0; | |
1869 | mutex_unlock(&ap_poll_thread_mutex); | |
1870 | return rc; | |
1871 | } | |
1872 | ||
1873 | static void ap_poll_thread_stop(void) | |
1874 | { | |
1875 | mutex_lock(&ap_poll_thread_mutex); | |
1876 | if (ap_poll_kthread) { | |
1877 | kthread_stop(ap_poll_kthread); | |
1878 | ap_poll_kthread = NULL; | |
1879 | } | |
1880 | mutex_unlock(&ap_poll_thread_mutex); | |
1881 | } | |
1882 | ||
af512ed0 | 1883 | /** |
1749a81d FB |
1884 | * ap_request_timeout(): Handling of request timeouts |
1885 | * @data: Holds the AP device. | |
1886 | * | |
1887 | * Handles request timeouts. | |
af512ed0 RW |
1888 | */ |
1889 | static void ap_request_timeout(unsigned long data) | |
1890 | { | |
1891 | struct ap_device *ap_dev = (struct ap_device *) data; | |
1892 | ||
cb17a636 | 1893 | if (ap_dev->reset == AP_RESET_ARMED) { |
af512ed0 | 1894 | ap_dev->reset = AP_RESET_DO; |
cb17a636 FB |
1895 | |
1896 | if (ap_using_interrupts()) | |
1897 | tasklet_schedule(&ap_tasklet); | |
1898 | } | |
af512ed0 RW |
1899 | } |
1900 | ||
13e742ba RW |
1901 | static void ap_reset_domain(void) |
1902 | { | |
1903 | int i; | |
1904 | ||
f60b8d44 | 1905 | if ((ap_domain_index != -1) && (ap_test_config_domain(ap_domain_index))) |
39aa7cf6 RW |
1906 | for (i = 0; i < AP_DEVICES; i++) |
1907 | ap_reset_queue(AP_MKQID(i, ap_domain_index)); | |
13e742ba RW |
1908 | } |
1909 | ||
1910 | static void ap_reset_all(void) | |
85eca850 RW |
1911 | { |
1912 | int i, j; | |
1913 | ||
170387a8 IT |
1914 | for (i = 0; i < AP_DOMAINS; i++) { |
1915 | if (!ap_test_config_domain(i)) | |
1916 | continue; | |
1917 | for (j = 0; j < AP_DEVICES; j++) { | |
1918 | if (!ap_test_config_card_id(j)) | |
1919 | continue; | |
85eca850 | 1920 | ap_reset_queue(AP_MKQID(j, i)); |
170387a8 IT |
1921 | } |
1922 | } | |
85eca850 RW |
1923 | } |
1924 | ||
1925 | static struct reset_call ap_reset_call = { | |
13e742ba | 1926 | .fn = ap_reset_all, |
85eca850 RW |
1927 | }; |
1928 | ||
1534c382 | 1929 | /** |
1749a81d FB |
1930 | * ap_module_init(): The module initialization code. |
1931 | * | |
1932 | * Initializes the module. | |
1534c382 MS |
1933 | */ |
1934 | int __init ap_module_init(void) | |
1935 | { | |
1936 | int rc, i; | |
1937 | ||
1938 | if (ap_domain_index < -1 || ap_domain_index >= AP_DOMAINS) { | |
136f7a1c MS |
1939 | pr_warning("%d is not a valid cryptographic domain\n", |
1940 | ap_domain_index); | |
1534c382 MS |
1941 | return -EINVAL; |
1942 | } | |
5314af69 FB |
1943 | /* In resume callback we need to know if the user had set the domain. |
1944 | * If so, we can not just reset it. | |
1945 | */ | |
1946 | if (ap_domain_index >= 0) | |
1947 | user_set_domain = 1; | |
1948 | ||
1534c382 | 1949 | if (ap_instructions_available() != 0) { |
136f7a1c MS |
1950 | pr_warning("The hardware system does not support " |
1951 | "AP instructions\n"); | |
1534c382 MS |
1952 | return -ENODEV; |
1953 | } | |
cb17a636 | 1954 | if (ap_interrupts_available()) { |
f4eae94f MS |
1955 | rc = register_adapter_interrupt(&ap_airq); |
1956 | ap_airq_flag = (rc == 0); | |
cb17a636 FB |
1957 | } |
1958 | ||
85eca850 | 1959 | register_reset_call(&ap_reset_call); |
1534c382 MS |
1960 | |
1961 | /* Create /sys/bus/ap. */ | |
1962 | rc = bus_register(&ap_bus_type); | |
1963 | if (rc) | |
1964 | goto out; | |
1965 | for (i = 0; ap_bus_attrs[i]; i++) { | |
1966 | rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]); | |
1967 | if (rc) | |
1968 | goto out_bus; | |
1969 | } | |
1970 | ||
1971 | /* Create /sys/devices/ap. */ | |
035da16f | 1972 | ap_root_device = root_device_register("ap"); |
ba8da213 | 1973 | rc = PTR_RET(ap_root_device); |
1534c382 MS |
1974 | if (rc) |
1975 | goto out_bus; | |
1976 | ||
1977 | ap_work_queue = create_singlethread_workqueue("kapwork"); | |
1978 | if (!ap_work_queue) { | |
1979 | rc = -ENOMEM; | |
1980 | goto out_root; | |
1981 | } | |
1982 | ||
75014550 | 1983 | ap_query_configuration(); |
1534c382 MS |
1984 | if (ap_select_domain() == 0) |
1985 | ap_scan_bus(NULL); | |
1986 | ||
1749a81d | 1987 | /* Setup the AP bus rescan timer. */ |
1534c382 MS |
1988 | init_timer(&ap_config_timer); |
1989 | ap_config_timer.function = ap_config_timeout; | |
1990 | ap_config_timer.data = 0; | |
1991 | ap_config_timer.expires = jiffies + ap_config_time * HZ; | |
1992 | add_timer(&ap_config_timer); | |
1993 | ||
fe137230 FB |
1994 | /* Setup the high resultion poll timer. |
1995 | * If we are running under z/VM adjust polling to z/VM polling rate. | |
1996 | */ | |
1997 | if (MACHINE_IS_VM) | |
1998 | poll_timeout = 1500000; | |
93521314 | 1999 | spin_lock_init(&ap_poll_timer_lock); |
fe137230 FB |
2000 | hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
2001 | ap_poll_timer.function = ap_poll_timeout; | |
2002 | ||
1534c382 MS |
2003 | /* Start the low priority AP bus poll thread. */ |
2004 | if (ap_thread_flag) { | |
2005 | rc = ap_poll_thread_start(); | |
2006 | if (rc) | |
2007 | goto out_work; | |
2008 | } | |
2009 | ||
2010 | return 0; | |
2011 | ||
2012 | out_work: | |
2013 | del_timer_sync(&ap_config_timer); | |
fe137230 | 2014 | hrtimer_cancel(&ap_poll_timer); |
1534c382 MS |
2015 | destroy_workqueue(ap_work_queue); |
2016 | out_root: | |
035da16f | 2017 | root_device_unregister(ap_root_device); |
1534c382 MS |
2018 | out_bus: |
2019 | while (i--) | |
2020 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
2021 | bus_unregister(&ap_bus_type); | |
2022 | out: | |
85eca850 | 2023 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
2024 | if (ap_using_interrupts()) |
2025 | unregister_adapter_interrupt(&ap_airq); | |
1534c382 MS |
2026 | return rc; |
2027 | } | |
2028 | ||
2029 | static int __ap_match_all(struct device *dev, void *data) | |
2030 | { | |
2031 | return 1; | |
2032 | } | |
2033 | ||
2034 | /** | |
1749a81d FB |
2035 | * ap_modules_exit(): The module termination code |
2036 | * | |
2037 | * Terminates the module. | |
1534c382 MS |
2038 | */ |
2039 | void ap_module_exit(void) | |
2040 | { | |
2041 | int i; | |
2042 | struct device *dev; | |
2043 | ||
13e742ba | 2044 | ap_reset_domain(); |
1534c382 MS |
2045 | ap_poll_thread_stop(); |
2046 | del_timer_sync(&ap_config_timer); | |
fe137230 | 2047 | hrtimer_cancel(&ap_poll_timer); |
1534c382 | 2048 | destroy_workqueue(ap_work_queue); |
13e742ba | 2049 | tasklet_kill(&ap_tasklet); |
1534c382 MS |
2050 | while ((dev = bus_find_device(&ap_bus_type, NULL, NULL, |
2051 | __ap_match_all))) | |
2052 | { | |
2053 | device_unregister(dev); | |
2054 | put_device(dev); | |
2055 | } | |
2056 | for (i = 0; ap_bus_attrs[i]; i++) | |
2057 | bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); | |
f60b8d44 | 2058 | root_device_unregister(ap_root_device); |
1534c382 | 2059 | bus_unregister(&ap_bus_type); |
85eca850 | 2060 | unregister_reset_call(&ap_reset_call); |
f4eae94f MS |
2061 | if (ap_using_interrupts()) |
2062 | unregister_adapter_interrupt(&ap_airq); | |
1534c382 MS |
2063 | } |
2064 | ||
1534c382 MS |
2065 | module_init(ap_module_init); |
2066 | module_exit(ap_module_exit); |