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11#include <linux/slab.h>
12#include <linux/compat.h>
13#include <linux/device.h>
14#include <linux/module.h>
15#include <linux/uaccess.h>
16#include <linux/miscdevice.h>
17#include <linux/kernel_stat.h>
18
19#include <asm/cio.h>
20#include <asm/chsc.h>
21#include <asm/isc.h>
22
23#include "cio.h"
24#include "cio_debug.h"
25#include "css.h"
26#include "chsc_sch.h"
27#include "ioasm.h"
28
29static debug_info_t *chsc_debug_msg_id;
30static debug_info_t *chsc_debug_log_id;
31
32static struct chsc_request *on_close_request;
33static struct chsc_async_area *on_close_chsc_area;
34static DEFINE_MUTEX(on_close_mutex);
35
36#define CHSC_MSG(imp, args...) do { \
37 debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \
38 } while (0)
39
40#define CHSC_LOG(imp, txt) do { \
41 debug_text_event(chsc_debug_log_id, imp , txt); \
42 } while (0)
43
44static void CHSC_LOG_HEX(int level, void *data, int length)
45{
46 debug_event(chsc_debug_log_id, level, data, length);
47}
48
49MODULE_AUTHOR("IBM Corporation");
50MODULE_DESCRIPTION("driver for s390 chsc subchannels");
51MODULE_LICENSE("GPL");
52
53static void chsc_subchannel_irq(struct subchannel *sch)
54{
55 struct chsc_private *private = dev_get_drvdata(&sch->dev);
56 struct chsc_request *request = private->request;
57 struct irb *irb = this_cpu_ptr(&cio_irb);
58
59 CHSC_LOG(4, "irb");
60 CHSC_LOG_HEX(4, irb, sizeof(*irb));
61 inc_irq_stat(IRQIO_CSC);
62
63
64 if (!request) {
65 CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n",
66 sch->schid.ssid, sch->schid.sch_no);
67 return;
68 }
69 private->request = NULL;
70 memcpy(&request->irb, irb, sizeof(*irb));
71 cio_update_schib(sch);
72 complete(&request->completion);
73 put_device(&sch->dev);
74}
75
76static int chsc_subchannel_probe(struct subchannel *sch)
77{
78 struct chsc_private *private;
79 int ret;
80
81 CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n",
82 sch->schid.ssid, sch->schid.sch_no);
83 sch->isc = CHSC_SCH_ISC;
84 private = kzalloc(sizeof(*private), GFP_KERNEL);
85 if (!private)
86 return -ENOMEM;
87 dev_set_drvdata(&sch->dev, private);
88 ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
89 if (ret) {
90 CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n",
91 sch->schid.ssid, sch->schid.sch_no, ret);
92 dev_set_drvdata(&sch->dev, NULL);
93 kfree(private);
94 } else {
95 if (dev_get_uevent_suppress(&sch->dev)) {
96 dev_set_uevent_suppress(&sch->dev, 0);
97 kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
98 }
99 }
100 return ret;
101}
102
103static int chsc_subchannel_remove(struct subchannel *sch)
104{
105 struct chsc_private *private;
106
107 cio_disable_subchannel(sch);
108 private = dev_get_drvdata(&sch->dev);
109 dev_set_drvdata(&sch->dev, NULL);
110 if (private->request) {
111 complete(&private->request->completion);
112 put_device(&sch->dev);
113 }
114 kfree(private);
115 return 0;
116}
117
118static void chsc_subchannel_shutdown(struct subchannel *sch)
119{
120 cio_disable_subchannel(sch);
121}
122
123static struct css_device_id chsc_subchannel_ids[] = {
124 { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
125 { },
126};
127MODULE_DEVICE_TABLE(css, chsc_subchannel_ids);
128
129static struct css_driver chsc_subchannel_driver = {
130 .drv = {
131 .owner = THIS_MODULE,
132 .name = "chsc_subchannel",
133 },
134 .subchannel_type = chsc_subchannel_ids,
135 .irq = chsc_subchannel_irq,
136 .probe = chsc_subchannel_probe,
137 .remove = chsc_subchannel_remove,
138 .shutdown = chsc_subchannel_shutdown,
139};
140
141static int __init chsc_init_dbfs(void)
142{
143 chsc_debug_msg_id = debug_register("chsc_msg", 8, 1, 4 * sizeof(long));
144 if (!chsc_debug_msg_id)
145 goto out;
146 debug_register_view(chsc_debug_msg_id, &debug_sprintf_view);
147 debug_set_level(chsc_debug_msg_id, 2);
148 chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16);
149 if (!chsc_debug_log_id)
150 goto out;
151 debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view);
152 debug_set_level(chsc_debug_log_id, 2);
153 return 0;
154out:
155 debug_unregister(chsc_debug_msg_id);
156 return -ENOMEM;
157}
158
159static void chsc_remove_dbfs(void)
160{
161 debug_unregister(chsc_debug_log_id);
162 debug_unregister(chsc_debug_msg_id);
163}
164
165static int __init chsc_init_sch_driver(void)
166{
167 return css_driver_register(&chsc_subchannel_driver);
168}
169
170static void chsc_cleanup_sch_driver(void)
171{
172 css_driver_unregister(&chsc_subchannel_driver);
173}
174
175static DEFINE_SPINLOCK(chsc_lock);
176
177static int chsc_subchannel_match_next_free(struct device *dev, const void *data)
178{
179 struct subchannel *sch = to_subchannel(dev);
180
181 return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw);
182}
183
184static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch)
185{
186 struct device *dev;
187
188 dev = driver_find_device(&chsc_subchannel_driver.drv,
189 sch ? &sch->dev : NULL, NULL,
190 chsc_subchannel_match_next_free);
191 return dev ? to_subchannel(dev) : NULL;
192}
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208static int chsc_async(struct chsc_async_area *chsc_area,
209 struct chsc_request *request)
210{
211 int cc;
212 struct chsc_private *private;
213 struct subchannel *sch = NULL;
214 int ret = -ENODEV;
215 char dbf[10];
216
217 chsc_area->header.key = PAGE_DEFAULT_KEY >> 4;
218 while ((sch = chsc_get_next_subchannel(sch))) {
219 spin_lock(sch->lock);
220 private = dev_get_drvdata(&sch->dev);
221 if (private->request) {
222 spin_unlock(sch->lock);
223 ret = -EBUSY;
224 continue;
225 }
226 chsc_area->header.sid = sch->schid;
227 CHSC_LOG(2, "schid");
228 CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid));
229 cc = chsc(chsc_area);
230 snprintf(dbf, sizeof(dbf), "cc:%d", cc);
231 CHSC_LOG(2, dbf);
232 switch (cc) {
233 case 0:
234 ret = 0;
235 break;
236 case 1:
237 sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC;
238 ret = -EINPROGRESS;
239 private->request = request;
240 break;
241 case 2:
242 ret = -EBUSY;
243 break;
244 default:
245 ret = -ENODEV;
246 }
247 spin_unlock(sch->lock);
248 CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n",
249 sch->schid.ssid, sch->schid.sch_no, cc);
250 if (ret == -EINPROGRESS)
251 return -EINPROGRESS;
252 put_device(&sch->dev);
253 if (ret == 0)
254 return 0;
255 }
256 return ret;
257}
258
259static void chsc_log_command(void *chsc_area)
260{
261 char dbf[10];
262
263 snprintf(dbf, sizeof(dbf), "CHSC:%x", ((uint16_t *)chsc_area)[1]);
264 CHSC_LOG(0, dbf);
265 CHSC_LOG_HEX(0, chsc_area, 32);
266}
267
268static int chsc_examine_irb(struct chsc_request *request)
269{
270 int backed_up;
271
272 if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND))
273 return -EIO;
274 backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK;
275 request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK;
276 if (scsw_cstat(&request->irb.scsw) == 0)
277 return 0;
278 if (!backed_up)
279 return 0;
280 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK)
281 return -EIO;
282 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK)
283 return -EPERM;
284 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK)
285 return -EAGAIN;
286 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK)
287 return -EAGAIN;
288 return -EIO;
289}
290
291static int chsc_ioctl_start(void __user *user_area)
292{
293 struct chsc_request *request;
294 struct chsc_async_area *chsc_area;
295 int ret;
296 char dbf[10];
297
298 if (!css_general_characteristics.dynio)
299
300 return -EOPNOTSUPP;
301 chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
302 if (!chsc_area)
303 return -ENOMEM;
304 request = kzalloc(sizeof(*request), GFP_KERNEL);
305 if (!request) {
306 ret = -ENOMEM;
307 goto out_free;
308 }
309 init_completion(&request->completion);
310 if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
311 ret = -EFAULT;
312 goto out_free;
313 }
314 chsc_log_command(chsc_area);
315 spin_lock_irq(&chsc_lock);
316 ret = chsc_async(chsc_area, request);
317 spin_unlock_irq(&chsc_lock);
318 if (ret == -EINPROGRESS) {
319 wait_for_completion(&request->completion);
320 ret = chsc_examine_irb(request);
321 }
322
323 if (!ret)
324 if (copy_to_user(user_area, chsc_area, PAGE_SIZE))
325 ret = -EFAULT;
326out_free:
327 snprintf(dbf, sizeof(dbf), "ret:%d", ret);
328 CHSC_LOG(0, dbf);
329 kfree(request);
330 free_page((unsigned long)chsc_area);
331 return ret;
332}
333
334static int chsc_ioctl_on_close_set(void __user *user_area)
335{
336 char dbf[13];
337 int ret;
338
339 mutex_lock(&on_close_mutex);
340 if (on_close_chsc_area) {
341 ret = -EBUSY;
342 goto out_unlock;
343 }
344 on_close_request = kzalloc(sizeof(*on_close_request), GFP_KERNEL);
345 if (!on_close_request) {
346 ret = -ENOMEM;
347 goto out_unlock;
348 }
349 on_close_chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
350 if (!on_close_chsc_area) {
351 ret = -ENOMEM;
352 goto out_free_request;
353 }
354 if (copy_from_user(on_close_chsc_area, user_area, PAGE_SIZE)) {
355 ret = -EFAULT;
356 goto out_free_chsc;
357 }
358 ret = 0;
359 goto out_unlock;
360
361out_free_chsc:
362 free_page((unsigned long)on_close_chsc_area);
363 on_close_chsc_area = NULL;
364out_free_request:
365 kfree(on_close_request);
366 on_close_request = NULL;
367out_unlock:
368 mutex_unlock(&on_close_mutex);
369 snprintf(dbf, sizeof(dbf), "ocsret:%d", ret);
370 CHSC_LOG(0, dbf);
371 return ret;
372}
373
374static int chsc_ioctl_on_close_remove(void)
375{
376 char dbf[13];
377 int ret;
378
379 mutex_lock(&on_close_mutex);
380 if (!on_close_chsc_area) {
381 ret = -ENOENT;
382 goto out_unlock;
383 }
384 free_page((unsigned long)on_close_chsc_area);
385 on_close_chsc_area = NULL;
386 kfree(on_close_request);
387 on_close_request = NULL;
388 ret = 0;
389out_unlock:
390 mutex_unlock(&on_close_mutex);
391 snprintf(dbf, sizeof(dbf), "ocrret:%d", ret);
392 CHSC_LOG(0, dbf);
393 return ret;
394}
395
396static int chsc_ioctl_start_sync(void __user *user_area)
397{
398 struct chsc_sync_area *chsc_area;
399 int ret, ccode;
400
401 chsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
402 if (!chsc_area)
403 return -ENOMEM;
404 if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
405 ret = -EFAULT;
406 goto out_free;
407 }
408 if (chsc_area->header.code & 0x4000) {
409 ret = -EINVAL;
410 goto out_free;
411 }
412 chsc_log_command(chsc_area);
413 ccode = chsc(chsc_area);
414 if (ccode != 0) {
415 ret = -EIO;
416 goto out_free;
417 }
418 if (copy_to_user(user_area, chsc_area, PAGE_SIZE))
419 ret = -EFAULT;
420 else
421 ret = 0;
422out_free:
423 free_page((unsigned long)chsc_area);
424 return ret;
425}
426
427static int chsc_ioctl_info_channel_path(void __user *user_cd)
428{
429 struct chsc_chp_cd *cd;
430 int ret, ccode;
431 struct {
432 struct chsc_header request;
433 u32 : 2;
434 u32 m : 1;
435 u32 : 1;
436 u32 fmt1 : 4;
437 u32 cssid : 8;
438 u32 : 8;
439 u32 first_chpid : 8;
440 u32 : 24;
441 u32 last_chpid : 8;
442 u32 : 32;
443 struct chsc_header response;
444 u8 data[PAGE_SIZE - 20];
445 } __attribute__ ((packed)) *scpcd_area;
446
447 scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
448 if (!scpcd_area)
449 return -ENOMEM;
450 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
451 if (!cd) {
452 ret = -ENOMEM;
453 goto out_free;
454 }
455 if (copy_from_user(cd, user_cd, sizeof(*cd))) {
456 ret = -EFAULT;
457 goto out_free;
458 }
459 scpcd_area->request.length = 0x0010;
460 scpcd_area->request.code = 0x0028;
461 scpcd_area->m = cd->m;
462 scpcd_area->fmt1 = cd->fmt;
463 scpcd_area->cssid = cd->chpid.cssid;
464 scpcd_area->first_chpid = cd->chpid.id;
465 scpcd_area->last_chpid = cd->chpid.id;
466
467 ccode = chsc(scpcd_area);
468 if (ccode != 0) {
469 ret = -EIO;
470 goto out_free;
471 }
472 if (scpcd_area->response.code != 0x0001) {
473 ret = -EIO;
474 CHSC_MSG(0, "scpcd: response code=%x\n",
475 scpcd_area->response.code);
476 goto out_free;
477 }
478 memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length);
479 if (copy_to_user(user_cd, cd, sizeof(*cd)))
480 ret = -EFAULT;
481 else
482 ret = 0;
483out_free:
484 kfree(cd);
485 free_page((unsigned long)scpcd_area);
486 return ret;
487}
488
489static int chsc_ioctl_info_cu(void __user *user_cd)
490{
491 struct chsc_cu_cd *cd;
492 int ret, ccode;
493 struct {
494 struct chsc_header request;
495 u32 : 2;
496 u32 m : 1;
497 u32 : 1;
498 u32 fmt1 : 4;
499 u32 cssid : 8;
500 u32 : 8;
501 u32 first_cun : 8;
502 u32 : 24;
503 u32 last_cun : 8;
504 u32 : 32;
505 struct chsc_header response;
506 u8 data[PAGE_SIZE - 20];
507 } __attribute__ ((packed)) *scucd_area;
508
509 scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
510 if (!scucd_area)
511 return -ENOMEM;
512 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
513 if (!cd) {
514 ret = -ENOMEM;
515 goto out_free;
516 }
517 if (copy_from_user(cd, user_cd, sizeof(*cd))) {
518 ret = -EFAULT;
519 goto out_free;
520 }
521 scucd_area->request.length = 0x0010;
522 scucd_area->request.code = 0x0026;
523 scucd_area->m = cd->m;
524 scucd_area->fmt1 = cd->fmt;
525 scucd_area->cssid = cd->cssid;
526 scucd_area->first_cun = cd->cun;
527 scucd_area->last_cun = cd->cun;
528
529 ccode = chsc(scucd_area);
530 if (ccode != 0) {
531 ret = -EIO;
532 goto out_free;
533 }
534 if (scucd_area->response.code != 0x0001) {
535 ret = -EIO;
536 CHSC_MSG(0, "scucd: response code=%x\n",
537 scucd_area->response.code);
538 goto out_free;
539 }
540 memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length);
541 if (copy_to_user(user_cd, cd, sizeof(*cd)))
542 ret = -EFAULT;
543 else
544 ret = 0;
545out_free:
546 kfree(cd);
547 free_page((unsigned long)scucd_area);
548 return ret;
549}
550
551static int chsc_ioctl_info_sch_cu(void __user *user_cud)
552{
553 struct chsc_sch_cud *cud;
554 int ret, ccode;
555 struct {
556 struct chsc_header request;
557 u32 : 2;
558 u32 m : 1;
559 u32 : 5;
560 u32 fmt1 : 4;
561 u32 : 2;
562 u32 ssid : 2;
563 u32 first_sch : 16;
564 u32 : 8;
565 u32 cssid : 8;
566 u32 last_sch : 16;
567 u32 : 32;
568 struct chsc_header response;
569 u8 data[PAGE_SIZE - 20];
570 } __attribute__ ((packed)) *sscud_area;
571
572 sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
573 if (!sscud_area)
574 return -ENOMEM;
575 cud = kzalloc(sizeof(*cud), GFP_KERNEL);
576 if (!cud) {
577 ret = -ENOMEM;
578 goto out_free;
579 }
580 if (copy_from_user(cud, user_cud, sizeof(*cud))) {
581 ret = -EFAULT;
582 goto out_free;
583 }
584 sscud_area->request.length = 0x0010;
585 sscud_area->request.code = 0x0006;
586 sscud_area->m = cud->schid.m;
587 sscud_area->fmt1 = cud->fmt;
588 sscud_area->ssid = cud->schid.ssid;
589 sscud_area->first_sch = cud->schid.sch_no;
590 sscud_area->cssid = cud->schid.cssid;
591 sscud_area->last_sch = cud->schid.sch_no;
592
593 ccode = chsc(sscud_area);
594 if (ccode != 0) {
595 ret = -EIO;
596 goto out_free;
597 }
598 if (sscud_area->response.code != 0x0001) {
599 ret = -EIO;
600 CHSC_MSG(0, "sscud: response code=%x\n",
601 sscud_area->response.code);
602 goto out_free;
603 }
604 memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length);
605 if (copy_to_user(user_cud, cud, sizeof(*cud)))
606 ret = -EFAULT;
607 else
608 ret = 0;
609out_free:
610 kfree(cud);
611 free_page((unsigned long)sscud_area);
612 return ret;
613}
614
615static int chsc_ioctl_conf_info(void __user *user_ci)
616{
617 struct chsc_conf_info *ci;
618 int ret, ccode;
619 struct {
620 struct chsc_header request;
621 u32 : 2;
622 u32 m : 1;
623 u32 : 1;
624 u32 fmt1 : 4;
625 u32 cssid : 8;
626 u32 : 6;
627 u32 ssid : 2;
628 u32 : 8;
629 u64 : 64;
630 struct chsc_header response;
631 u8 data[PAGE_SIZE - 20];
632 } __attribute__ ((packed)) *sci_area;
633
634 sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
635 if (!sci_area)
636 return -ENOMEM;
637 ci = kzalloc(sizeof(*ci), GFP_KERNEL);
638 if (!ci) {
639 ret = -ENOMEM;
640 goto out_free;
641 }
642 if (copy_from_user(ci, user_ci, sizeof(*ci))) {
643 ret = -EFAULT;
644 goto out_free;
645 }
646 sci_area->request.length = 0x0010;
647 sci_area->request.code = 0x0012;
648 sci_area->m = ci->id.m;
649 sci_area->fmt1 = ci->fmt;
650 sci_area->cssid = ci->id.cssid;
651 sci_area->ssid = ci->id.ssid;
652
653 ccode = chsc(sci_area);
654 if (ccode != 0) {
655 ret = -EIO;
656 goto out_free;
657 }
658 if (sci_area->response.code != 0x0001) {
659 ret = -EIO;
660 CHSC_MSG(0, "sci: response code=%x\n",
661 sci_area->response.code);
662 goto out_free;
663 }
664 memcpy(&ci->scid, &sci_area->response, sci_area->response.length);
665 if (copy_to_user(user_ci, ci, sizeof(*ci)))
666 ret = -EFAULT;
667 else
668 ret = 0;
669out_free:
670 kfree(ci);
671 free_page((unsigned long)sci_area);
672 return ret;
673}
674
675static int chsc_ioctl_conf_comp_list(void __user *user_ccl)
676{
677 struct chsc_comp_list *ccl;
678 int ret, ccode;
679 struct {
680 struct chsc_header request;
681 u32 ctype : 8;
682 u32 : 4;
683 u32 fmt : 4;
684 u32 : 16;
685 u64 : 64;
686 u32 list_parm[2];
687 u64 : 64;
688 struct chsc_header response;
689 u8 data[PAGE_SIZE - 36];
690 } __attribute__ ((packed)) *sccl_area;
691 struct {
692 u32 m : 1;
693 u32 : 31;
694 u32 cssid : 8;
695 u32 : 16;
696 u32 chpid : 8;
697 } __attribute__ ((packed)) *chpid_parm;
698 struct {
699 u32 f_cssid : 8;
700 u32 l_cssid : 8;
701 u32 : 16;
702 u32 res;
703 } __attribute__ ((packed)) *cssids_parm;
704
705 sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
706 if (!sccl_area)
707 return -ENOMEM;
708 ccl = kzalloc(sizeof(*ccl), GFP_KERNEL);
709 if (!ccl) {
710 ret = -ENOMEM;
711 goto out_free;
712 }
713 if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) {
714 ret = -EFAULT;
715 goto out_free;
716 }
717 sccl_area->request.length = 0x0020;
718 sccl_area->request.code = 0x0030;
719 sccl_area->fmt = ccl->req.fmt;
720 sccl_area->ctype = ccl->req.ctype;
721 switch (sccl_area->ctype) {
722 case CCL_CU_ON_CHP:
723 case CCL_IOP_CHP:
724 chpid_parm = (void *)&sccl_area->list_parm;
725 chpid_parm->m = ccl->req.chpid.m;
726 chpid_parm->cssid = ccl->req.chpid.chp.cssid;
727 chpid_parm->chpid = ccl->req.chpid.chp.id;
728 break;
729 case CCL_CSS_IMG:
730 case CCL_CSS_IMG_CONF_CHAR:
731 cssids_parm = (void *)&sccl_area->list_parm;
732 cssids_parm->f_cssid = ccl->req.cssids.f_cssid;
733 cssids_parm->l_cssid = ccl->req.cssids.l_cssid;
734 break;
735 }
736 ccode = chsc(sccl_area);
737 if (ccode != 0) {
738 ret = -EIO;
739 goto out_free;
740 }
741 if (sccl_area->response.code != 0x0001) {
742 ret = -EIO;
743 CHSC_MSG(0, "sccl: response code=%x\n",
744 sccl_area->response.code);
745 goto out_free;
746 }
747 memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length);
748 if (copy_to_user(user_ccl, ccl, sizeof(*ccl)))
749 ret = -EFAULT;
750 else
751 ret = 0;
752out_free:
753 kfree(ccl);
754 free_page((unsigned long)sccl_area);
755 return ret;
756}
757
758static int chsc_ioctl_chpd(void __user *user_chpd)
759{
760 struct chsc_scpd *scpd_area;
761 struct chsc_cpd_info *chpd;
762 int ret;
763
764 chpd = kzalloc(sizeof(*chpd), GFP_KERNEL);
765 scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
766 if (!scpd_area || !chpd) {
767 ret = -ENOMEM;
768 goto out_free;
769 }
770 if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) {
771 ret = -EFAULT;
772 goto out_free;
773 }
774 ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt,
775 chpd->rfmt, chpd->c, chpd->m,
776 scpd_area);
777 if (ret)
778 goto out_free;
779 memcpy(&chpd->chpdb, &scpd_area->response, scpd_area->response.length);
780 if (copy_to_user(user_chpd, chpd, sizeof(*chpd)))
781 ret = -EFAULT;
782out_free:
783 kfree(chpd);
784 free_page((unsigned long)scpd_area);
785 return ret;
786}
787
788static int chsc_ioctl_dcal(void __user *user_dcal)
789{
790 struct chsc_dcal *dcal;
791 int ret, ccode;
792 struct {
793 struct chsc_header request;
794 u32 atype : 8;
795 u32 : 4;
796 u32 fmt : 4;
797 u32 : 16;
798 u32 res0[2];
799 u32 list_parm[2];
800 u32 res1[2];
801 struct chsc_header response;
802 u8 data[PAGE_SIZE - 36];
803 } __attribute__ ((packed)) *sdcal_area;
804
805 sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
806 if (!sdcal_area)
807 return -ENOMEM;
808 dcal = kzalloc(sizeof(*dcal), GFP_KERNEL);
809 if (!dcal) {
810 ret = -ENOMEM;
811 goto out_free;
812 }
813 if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) {
814 ret = -EFAULT;
815 goto out_free;
816 }
817 sdcal_area->request.length = 0x0020;
818 sdcal_area->request.code = 0x0034;
819 sdcal_area->atype = dcal->req.atype;
820 sdcal_area->fmt = dcal->req.fmt;
821 memcpy(&sdcal_area->list_parm, &dcal->req.list_parm,
822 sizeof(sdcal_area->list_parm));
823
824 ccode = chsc(sdcal_area);
825 if (ccode != 0) {
826 ret = -EIO;
827 goto out_free;
828 }
829 if (sdcal_area->response.code != 0x0001) {
830 ret = -EIO;
831 CHSC_MSG(0, "sdcal: response code=%x\n",
832 sdcal_area->response.code);
833 goto out_free;
834 }
835 memcpy(&dcal->sdcal, &sdcal_area->response,
836 sdcal_area->response.length);
837 if (copy_to_user(user_dcal, dcal, sizeof(*dcal)))
838 ret = -EFAULT;
839 else
840 ret = 0;
841out_free:
842 kfree(dcal);
843 free_page((unsigned long)sdcal_area);
844 return ret;
845}
846
847static long chsc_ioctl(struct file *filp, unsigned int cmd,
848 unsigned long arg)
849{
850 void __user *argp;
851
852 CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd);
853 if (is_compat_task())
854 argp = compat_ptr(arg);
855 else
856 argp = (void __user *)arg;
857 switch (cmd) {
858 case CHSC_START:
859 return chsc_ioctl_start(argp);
860 case CHSC_START_SYNC:
861 return chsc_ioctl_start_sync(argp);
862 case CHSC_INFO_CHANNEL_PATH:
863 return chsc_ioctl_info_channel_path(argp);
864 case CHSC_INFO_CU:
865 return chsc_ioctl_info_cu(argp);
866 case CHSC_INFO_SCH_CU:
867 return chsc_ioctl_info_sch_cu(argp);
868 case CHSC_INFO_CI:
869 return chsc_ioctl_conf_info(argp);
870 case CHSC_INFO_CCL:
871 return chsc_ioctl_conf_comp_list(argp);
872 case CHSC_INFO_CPD:
873 return chsc_ioctl_chpd(argp);
874 case CHSC_INFO_DCAL:
875 return chsc_ioctl_dcal(argp);
876 case CHSC_ON_CLOSE_SET:
877 return chsc_ioctl_on_close_set(argp);
878 case CHSC_ON_CLOSE_REMOVE:
879 return chsc_ioctl_on_close_remove();
880 default:
881 return -ENOIOCTLCMD;
882 }
883}
884
885static atomic_t chsc_ready_for_use = ATOMIC_INIT(1);
886
887static int chsc_open(struct inode *inode, struct file *file)
888{
889 if (!atomic_dec_and_test(&chsc_ready_for_use)) {
890 atomic_inc(&chsc_ready_for_use);
891 return -EBUSY;
892 }
893 return nonseekable_open(inode, file);
894}
895
896static int chsc_release(struct inode *inode, struct file *filp)
897{
898 char dbf[13];
899 int ret;
900
901 mutex_lock(&on_close_mutex);
902 if (!on_close_chsc_area)
903 goto out_unlock;
904 init_completion(&on_close_request->completion);
905 CHSC_LOG(0, "on_close");
906 chsc_log_command(on_close_chsc_area);
907 spin_lock_irq(&chsc_lock);
908 ret = chsc_async(on_close_chsc_area, on_close_request);
909 spin_unlock_irq(&chsc_lock);
910 if (ret == -EINPROGRESS) {
911 wait_for_completion(&on_close_request->completion);
912 ret = chsc_examine_irb(on_close_request);
913 }
914 snprintf(dbf, sizeof(dbf), "relret:%d", ret);
915 CHSC_LOG(0, dbf);
916 free_page((unsigned long)on_close_chsc_area);
917 on_close_chsc_area = NULL;
918 kfree(on_close_request);
919 on_close_request = NULL;
920out_unlock:
921 mutex_unlock(&on_close_mutex);
922 atomic_inc(&chsc_ready_for_use);
923 return 0;
924}
925
926static const struct file_operations chsc_fops = {
927 .owner = THIS_MODULE,
928 .open = chsc_open,
929 .release = chsc_release,
930 .unlocked_ioctl = chsc_ioctl,
931 .compat_ioctl = chsc_ioctl,
932 .llseek = no_llseek,
933};
934
935static struct miscdevice chsc_misc_device = {
936 .minor = MISC_DYNAMIC_MINOR,
937 .name = "chsc",
938 .fops = &chsc_fops,
939};
940
941static int __init chsc_misc_init(void)
942{
943 return misc_register(&chsc_misc_device);
944}
945
946static void chsc_misc_cleanup(void)
947{
948 misc_deregister(&chsc_misc_device);
949}
950
951static int __init chsc_sch_init(void)
952{
953 int ret;
954
955 ret = chsc_init_dbfs();
956 if (ret)
957 return ret;
958 isc_register(CHSC_SCH_ISC);
959 ret = chsc_init_sch_driver();
960 if (ret)
961 goto out_dbf;
962 ret = chsc_misc_init();
963 if (ret)
964 goto out_driver;
965 return ret;
966out_driver:
967 chsc_cleanup_sch_driver();
968out_dbf:
969 isc_unregister(CHSC_SCH_ISC);
970 chsc_remove_dbfs();
971 return ret;
972}
973
974static void __exit chsc_sch_exit(void)
975{
976 chsc_misc_cleanup();
977 chsc_cleanup_sch_driver();
978 isc_unregister(CHSC_SCH_ISC);
979 chsc_remove_dbfs();
980}
981
982module_init(chsc_sch_init);
983module_exit(chsc_sch_exit);
984
