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