1 /*
2 * Driver for s390 chsc subchannels
3 *
4 * Copyright IBM Corp. 2008
5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
6 *
7 */
8
9 #include <linux/device.h>
10 #include <linux/module.h>
11 #include <linux/uaccess.h>
12 #include <linux/miscdevice.h>
13
14 #include <asm/cio.h>
15 #include <asm/chsc.h>
16 #include <asm/isc.h>
17
18 #include "cio.h"
19 #include "cio_debug.h"
20 #include "css.h"
21 #include "chsc_sch.h"
22 #include "ioasm.h"
23
24 static debug_info_t *chsc_debug_msg_id;
25 static debug_info_t *chsc_debug_log_id;
26
27 #define CHSC_MSG(imp, args...) do { \
28 debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \
29 } while (0)
30
31 #define CHSC_LOG(imp, txt) do { \
32 debug_text_event(chsc_debug_log_id, imp , txt); \
33 } while (0)
34
CHSC_LOG_HEX(int level,void * data,int length)35 static void CHSC_LOG_HEX(int level, void *data, int length)
36 {
37 while (length > 0) {
38 debug_event(chsc_debug_log_id, level, data, length);
39 length -= chsc_debug_log_id->buf_size;
40 data += chsc_debug_log_id->buf_size;
41 }
42 }
43
44 MODULE_AUTHOR("IBM Corporation");
45 MODULE_DESCRIPTION("driver for s390 chsc subchannels");
46 MODULE_LICENSE("GPL");
47
chsc_subchannel_irq(struct subchannel * sch)48 static void chsc_subchannel_irq(struct subchannel *sch)
49 {
50 struct chsc_private *private = sch->private;
51 struct chsc_request *request = private->request;
52 struct irb *irb = (struct irb *)__LC_IRB;
53
54 CHSC_LOG(4, "irb");
55 CHSC_LOG_HEX(4, irb, sizeof(*irb));
56 /* Copy irb to provided request and set done. */
57 if (!request) {
58 CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n",
59 sch->schid.ssid, sch->schid.sch_no);
60 return;
61 }
62 private->request = NULL;
63 memcpy(&request->irb, irb, sizeof(*irb));
64 cio_update_schib(sch);
65 complete(&request->completion);
66 put_device(&sch->dev);
67 }
68
chsc_subchannel_probe(struct subchannel * sch)69 static int chsc_subchannel_probe(struct subchannel *sch)
70 {
71 struct chsc_private *private;
72 int ret;
73
74 CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n",
75 sch->schid.ssid, sch->schid.sch_no);
76 sch->isc = CHSC_SCH_ISC;
77 private = kzalloc(sizeof(*private), GFP_KERNEL);
78 if (!private)
79 return -ENOMEM;
80 ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
81 if (ret) {
82 CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n",
83 sch->schid.ssid, sch->schid.sch_no, ret);
84 kfree(private);
85 } else {
86 sch->private = private;
87 if (sch->dev.uevent_suppress) {
88 sch->dev.uevent_suppress = 0;
89 kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
90 }
91 }
92 return ret;
93 }
94
chsc_subchannel_remove(struct subchannel * sch)95 static int chsc_subchannel_remove(struct subchannel *sch)
96 {
97 struct chsc_private *private;
98
99 cio_disable_subchannel(sch);
100 private = sch->private;
101 sch->private = NULL;
102 if (private->request) {
103 complete(&private->request->completion);
104 put_device(&sch->dev);
105 }
106 kfree(private);
107 return 0;
108 }
109
chsc_subchannel_shutdown(struct subchannel * sch)110 static void chsc_subchannel_shutdown(struct subchannel *sch)
111 {
112 cio_disable_subchannel(sch);
113 }
114
115 static struct css_device_id chsc_subchannel_ids[] = {
116 { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
117 { /* end of list */ },
118 };
119 MODULE_DEVICE_TABLE(css, chsc_subchannel_ids);
120
121 static struct css_driver chsc_subchannel_driver = {
122 .owner = THIS_MODULE,
123 .subchannel_type = chsc_subchannel_ids,
124 .irq = chsc_subchannel_irq,
125 .probe = chsc_subchannel_probe,
126 .remove = chsc_subchannel_remove,
127 .shutdown = chsc_subchannel_shutdown,
128 .name = "chsc_subchannel",
129 };
130
chsc_init_dbfs(void)131 static int __init chsc_init_dbfs(void)
132 {
133 chsc_debug_msg_id = debug_register("chsc_msg", 16, 1,
134 16 * sizeof(long));
135 if (!chsc_debug_msg_id)
136 goto out;
137 debug_register_view(chsc_debug_msg_id, &debug_sprintf_view);
138 debug_set_level(chsc_debug_msg_id, 2);
139 chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16);
140 if (!chsc_debug_log_id)
141 goto out;
142 debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view);
143 debug_set_level(chsc_debug_log_id, 2);
144 return 0;
145 out:
146 if (chsc_debug_msg_id)
147 debug_unregister(chsc_debug_msg_id);
148 return -ENOMEM;
149 }
150
chsc_remove_dbfs(void)151 static void chsc_remove_dbfs(void)
152 {
153 debug_unregister(chsc_debug_log_id);
154 debug_unregister(chsc_debug_msg_id);
155 }
156
chsc_init_sch_driver(void)157 static int __init chsc_init_sch_driver(void)
158 {
159 return css_driver_register(&chsc_subchannel_driver);
160 }
161
chsc_cleanup_sch_driver(void)162 static void chsc_cleanup_sch_driver(void)
163 {
164 css_driver_unregister(&chsc_subchannel_driver);
165 }
166
167 static DEFINE_SPINLOCK(chsc_lock);
168
chsc_subchannel_match_next_free(struct device * dev,void * data)169 static int chsc_subchannel_match_next_free(struct device *dev, void *data)
170 {
171 struct subchannel *sch = to_subchannel(dev);
172
173 return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw);
174 }
175
chsc_get_next_subchannel(struct subchannel * sch)176 static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch)
177 {
178 struct device *dev;
179
180 dev = driver_find_device(&chsc_subchannel_driver.drv,
181 sch ? &sch->dev : NULL, NULL,
182 chsc_subchannel_match_next_free);
183 return dev ? to_subchannel(dev) : NULL;
184 }
185
186 /**
187 * chsc_async() - try to start a chsc request asynchronously
188 * @chsc_area: request to be started
189 * @request: request structure to associate
190 *
191 * Tries to start a chsc request on one of the existing chsc subchannels.
192 * Returns:
193 * %0 if the request was performed synchronously
194 * %-EINPROGRESS if the request was successfully started
195 * %-EBUSY if all chsc subchannels are busy
196 * %-ENODEV if no chsc subchannels are available
197 * Context:
198 * interrupts disabled, chsc_lock held
199 */
chsc_async(struct chsc_async_area * chsc_area,struct chsc_request * request)200 static int chsc_async(struct chsc_async_area *chsc_area,
201 struct chsc_request *request)
202 {
203 int cc;
204 struct chsc_private *private;
205 struct subchannel *sch = NULL;
206 int ret = -ENODEV;
207 char dbf[10];
208
209 chsc_area->header.key = PAGE_DEFAULT_KEY;
210 while ((sch = chsc_get_next_subchannel(sch))) {
211 spin_lock(sch->lock);
212 private = sch->private;
213 if (private->request) {
214 spin_unlock(sch->lock);
215 ret = -EBUSY;
216 continue;
217 }
218 chsc_area->header.sid = sch->schid;
219 CHSC_LOG(2, "schid");
220 CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid));
221 cc = chsc(chsc_area);
222 sprintf(dbf, "cc:%d", cc);
223 CHSC_LOG(2, dbf);
224 switch (cc) {
225 case 0:
226 ret = 0;
227 break;
228 case 1:
229 sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC;
230 ret = -EINPROGRESS;
231 private->request = request;
232 break;
233 case 2:
234 ret = -EBUSY;
235 break;
236 default:
237 ret = -ENODEV;
238 }
239 spin_unlock(sch->lock);
240 CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n",
241 sch->schid.ssid, sch->schid.sch_no, cc);
242 if (ret == -EINPROGRESS)
243 return -EINPROGRESS;
244 put_device(&sch->dev);
245 if (ret == 0)
246 return 0;
247 }
248 return ret;
249 }
250
chsc_log_command(struct chsc_async_area * chsc_area)251 static void chsc_log_command(struct chsc_async_area *chsc_area)
252 {
253 char dbf[10];
254
255 sprintf(dbf, "CHSC:%x", chsc_area->header.code);
256 CHSC_LOG(0, dbf);
257 CHSC_LOG_HEX(0, chsc_area, 32);
258 }
259
chsc_examine_irb(struct chsc_request * request)260 static int chsc_examine_irb(struct chsc_request *request)
261 {
262 int backed_up;
263
264 if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND))
265 return -EIO;
266 backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK;
267 request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK;
268 if (scsw_cstat(&request->irb.scsw) == 0)
269 return 0;
270 if (!backed_up)
271 return 0;
272 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK)
273 return -EIO;
274 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK)
275 return -EPERM;
276 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK)
277 return -EAGAIN;
278 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK)
279 return -EAGAIN;
280 return -EIO;
281 }
282
chsc_ioctl_start(void __user * user_area)283 static int chsc_ioctl_start(void __user *user_area)
284 {
285 struct chsc_request *request;
286 struct chsc_async_area *chsc_area;
287 int ret;
288 char dbf[10];
289
290 if (!css_general_characteristics.dynio)
291 /* It makes no sense to try. */
292 return -EOPNOTSUPP;
293 chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
294 if (!chsc_area)
295 return -ENOMEM;
296 request = kzalloc(sizeof(*request), GFP_KERNEL);
297 if (!request) {
298 ret = -ENOMEM;
299 goto out_free;
300 }
301 init_completion(&request->completion);
302 if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
303 ret = -EFAULT;
304 goto out_free;
305 }
306 chsc_log_command(chsc_area);
307 spin_lock_irq(&chsc_lock);
308 ret = chsc_async(chsc_area, request);
309 spin_unlock_irq(&chsc_lock);
310 if (ret == -EINPROGRESS) {
311 wait_for_completion(&request->completion);
312 ret = chsc_examine_irb(request);
313 }
314 /* copy area back to user */
315 if (!ret)
316 if (copy_to_user(user_area, chsc_area, PAGE_SIZE))
317 ret = -EFAULT;
318 out_free:
319 sprintf(dbf, "ret:%d", ret);
320 CHSC_LOG(0, dbf);
321 kfree(request);
322 free_page((unsigned long)chsc_area);
323 return ret;
324 }
325
chsc_ioctl_info_channel_path(void __user * user_cd)326 static int chsc_ioctl_info_channel_path(void __user *user_cd)
327 {
328 struct chsc_chp_cd *cd;
329 int ret, ccode;
330 struct {
331 struct chsc_header request;
332 u32 : 2;
333 u32 m : 1;
334 u32 : 1;
335 u32 fmt1 : 4;
336 u32 cssid : 8;
337 u32 : 8;
338 u32 first_chpid : 8;
339 u32 : 24;
340 u32 last_chpid : 8;
341 u32 : 32;
342 struct chsc_header response;
343 u8 data[PAGE_SIZE - 20];
344 } __attribute__ ((packed)) *scpcd_area;
345
346 scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
347 if (!scpcd_area)
348 return -ENOMEM;
349 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
350 if (!cd) {
351 ret = -ENOMEM;
352 goto out_free;
353 }
354 if (copy_from_user(cd, user_cd, sizeof(*cd))) {
355 ret = -EFAULT;
356 goto out_free;
357 }
358 scpcd_area->request.length = 0x0010;
359 scpcd_area->request.code = 0x0028;
360 scpcd_area->m = cd->m;
361 scpcd_area->fmt1 = cd->fmt;
362 scpcd_area->cssid = cd->chpid.cssid;
363 scpcd_area->first_chpid = cd->chpid.id;
364 scpcd_area->last_chpid = cd->chpid.id;
365
366 ccode = chsc(scpcd_area);
367 if (ccode != 0) {
368 ret = -EIO;
369 goto out_free;
370 }
371 if (scpcd_area->response.code != 0x0001) {
372 ret = -EIO;
373 CHSC_MSG(0, "scpcd: response code=%x\n",
374 scpcd_area->response.code);
375 goto out_free;
376 }
377 memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length);
378 if (copy_to_user(user_cd, cd, sizeof(*cd)))
379 ret = -EFAULT;
380 else
381 ret = 0;
382 out_free:
383 kfree(cd);
384 free_page((unsigned long)scpcd_area);
385 return ret;
386 }
387
chsc_ioctl_info_cu(void __user * user_cd)388 static int chsc_ioctl_info_cu(void __user *user_cd)
389 {
390 struct chsc_cu_cd *cd;
391 int ret, ccode;
392 struct {
393 struct chsc_header request;
394 u32 : 2;
395 u32 m : 1;
396 u32 : 1;
397 u32 fmt1 : 4;
398 u32 cssid : 8;
399 u32 : 8;
400 u32 first_cun : 8;
401 u32 : 24;
402 u32 last_cun : 8;
403 u32 : 32;
404 struct chsc_header response;
405 u8 data[PAGE_SIZE - 20];
406 } __attribute__ ((packed)) *scucd_area;
407
408 scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
409 if (!scucd_area)
410 return -ENOMEM;
411 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
412 if (!cd) {
413 ret = -ENOMEM;
414 goto out_free;
415 }
416 if (copy_from_user(cd, user_cd, sizeof(*cd))) {
417 ret = -EFAULT;
418 goto out_free;
419 }
420 scucd_area->request.length = 0x0010;
421 scucd_area->request.code = 0x0028;
422 scucd_area->m = cd->m;
423 scucd_area->fmt1 = cd->fmt;
424 scucd_area->cssid = cd->cssid;
425 scucd_area->first_cun = cd->cun;
426 scucd_area->last_cun = cd->cun;
427
428 ccode = chsc(scucd_area);
429 if (ccode != 0) {
430 ret = -EIO;
431 goto out_free;
432 }
433 if (scucd_area->response.code != 0x0001) {
434 ret = -EIO;
435 CHSC_MSG(0, "scucd: response code=%x\n",
436 scucd_area->response.code);
437 goto out_free;
438 }
439 memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length);
440 if (copy_to_user(user_cd, cd, sizeof(*cd)))
441 ret = -EFAULT;
442 else
443 ret = 0;
444 out_free:
445 kfree(cd);
446 free_page((unsigned long)scucd_area);
447 return ret;
448 }
449
chsc_ioctl_info_sch_cu(void __user * user_cud)450 static int chsc_ioctl_info_sch_cu(void __user *user_cud)
451 {
452 struct chsc_sch_cud *cud;
453 int ret, ccode;
454 struct {
455 struct chsc_header request;
456 u32 : 2;
457 u32 m : 1;
458 u32 : 5;
459 u32 fmt1 : 4;
460 u32 : 2;
461 u32 ssid : 2;
462 u32 first_sch : 16;
463 u32 : 8;
464 u32 cssid : 8;
465 u32 last_sch : 16;
466 u32 : 32;
467 struct chsc_header response;
468 u8 data[PAGE_SIZE - 20];
469 } __attribute__ ((packed)) *sscud_area;
470
471 sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
472 if (!sscud_area)
473 return -ENOMEM;
474 cud = kzalloc(sizeof(*cud), GFP_KERNEL);
475 if (!cud) {
476 ret = -ENOMEM;
477 goto out_free;
478 }
479 if (copy_from_user(cud, user_cud, sizeof(*cud))) {
480 ret = -EFAULT;
481 goto out_free;
482 }
483 sscud_area->request.length = 0x0010;
484 sscud_area->request.code = 0x0006;
485 sscud_area->m = cud->schid.m;
486 sscud_area->fmt1 = cud->fmt;
487 sscud_area->ssid = cud->schid.ssid;
488 sscud_area->first_sch = cud->schid.sch_no;
489 sscud_area->cssid = cud->schid.cssid;
490 sscud_area->last_sch = cud->schid.sch_no;
491
492 ccode = chsc(sscud_area);
493 if (ccode != 0) {
494 ret = -EIO;
495 goto out_free;
496 }
497 if (sscud_area->response.code != 0x0001) {
498 ret = -EIO;
499 CHSC_MSG(0, "sscud: response code=%x\n",
500 sscud_area->response.code);
501 goto out_free;
502 }
503 memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length);
504 if (copy_to_user(user_cud, cud, sizeof(*cud)))
505 ret = -EFAULT;
506 else
507 ret = 0;
508 out_free:
509 kfree(cud);
510 free_page((unsigned long)sscud_area);
511 return ret;
512 }
513
chsc_ioctl_conf_info(void __user * user_ci)514 static int chsc_ioctl_conf_info(void __user *user_ci)
515 {
516 struct chsc_conf_info *ci;
517 int ret, ccode;
518 struct {
519 struct chsc_header request;
520 u32 : 2;
521 u32 m : 1;
522 u32 : 1;
523 u32 fmt1 : 4;
524 u32 cssid : 8;
525 u32 : 6;
526 u32 ssid : 2;
527 u32 : 8;
528 u64 : 64;
529 struct chsc_header response;
530 u8 data[PAGE_SIZE - 20];
531 } __attribute__ ((packed)) *sci_area;
532
533 sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
534 if (!sci_area)
535 return -ENOMEM;
536 ci = kzalloc(sizeof(*ci), GFP_KERNEL);
537 if (!ci) {
538 ret = -ENOMEM;
539 goto out_free;
540 }
541 if (copy_from_user(ci, user_ci, sizeof(*ci))) {
542 ret = -EFAULT;
543 goto out_free;
544 }
545 sci_area->request.length = 0x0010;
546 sci_area->request.code = 0x0012;
547 sci_area->m = ci->id.m;
548 sci_area->fmt1 = ci->fmt;
549 sci_area->cssid = ci->id.cssid;
550 sci_area->ssid = ci->id.ssid;
551
552 ccode = chsc(sci_area);
553 if (ccode != 0) {
554 ret = -EIO;
555 goto out_free;
556 }
557 if (sci_area->response.code != 0x0001) {
558 ret = -EIO;
559 CHSC_MSG(0, "sci: response code=%x\n",
560 sci_area->response.code);
561 goto out_free;
562 }
563 memcpy(&ci->scid, &sci_area->response, sci_area->response.length);
564 if (copy_to_user(user_ci, ci, sizeof(*ci)))
565 ret = -EFAULT;
566 else
567 ret = 0;
568 out_free:
569 kfree(ci);
570 free_page((unsigned long)sci_area);
571 return ret;
572 }
573
chsc_ioctl_conf_comp_list(void __user * user_ccl)574 static int chsc_ioctl_conf_comp_list(void __user *user_ccl)
575 {
576 struct chsc_comp_list *ccl;
577 int ret, ccode;
578 struct {
579 struct chsc_header request;
580 u32 ctype : 8;
581 u32 : 4;
582 u32 fmt : 4;
583 u32 : 16;
584 u64 : 64;
585 u32 list_parm[2];
586 u64 : 64;
587 struct chsc_header response;
588 u8 data[PAGE_SIZE - 36];
589 } __attribute__ ((packed)) *sccl_area;
590 struct {
591 u32 m : 1;
592 u32 : 31;
593 u32 cssid : 8;
594 u32 : 16;
595 u32 chpid : 8;
596 } __attribute__ ((packed)) *chpid_parm;
597 struct {
598 u32 f_cssid : 8;
599 u32 l_cssid : 8;
600 u32 : 16;
601 u32 res;
602 } __attribute__ ((packed)) *cssids_parm;
603
604 sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
605 if (!sccl_area)
606 return -ENOMEM;
607 ccl = kzalloc(sizeof(*ccl), GFP_KERNEL);
608 if (!ccl) {
609 ret = -ENOMEM;
610 goto out_free;
611 }
612 if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) {
613 ret = -EFAULT;
614 goto out_free;
615 }
616 sccl_area->request.length = 0x0020;
617 sccl_area->request.code = 0x0030;
618 sccl_area->fmt = ccl->req.fmt;
619 sccl_area->ctype = ccl->req.ctype;
620 switch (sccl_area->ctype) {
621 case CCL_CU_ON_CHP:
622 case CCL_IOP_CHP:
623 chpid_parm = (void *)&sccl_area->list_parm;
624 chpid_parm->m = ccl->req.chpid.m;
625 chpid_parm->cssid = ccl->req.chpid.chp.cssid;
626 chpid_parm->chpid = ccl->req.chpid.chp.id;
627 break;
628 case CCL_CSS_IMG:
629 case CCL_CSS_IMG_CONF_CHAR:
630 cssids_parm = (void *)&sccl_area->list_parm;
631 cssids_parm->f_cssid = ccl->req.cssids.f_cssid;
632 cssids_parm->l_cssid = ccl->req.cssids.l_cssid;
633 break;
634 }
635 ccode = chsc(sccl_area);
636 if (ccode != 0) {
637 ret = -EIO;
638 goto out_free;
639 }
640 if (sccl_area->response.code != 0x0001) {
641 ret = -EIO;
642 CHSC_MSG(0, "sccl: response code=%x\n",
643 sccl_area->response.code);
644 goto out_free;
645 }
646 memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length);
647 if (copy_to_user(user_ccl, ccl, sizeof(*ccl)))
648 ret = -EFAULT;
649 else
650 ret = 0;
651 out_free:
652 kfree(ccl);
653 free_page((unsigned long)sccl_area);
654 return ret;
655 }
656
chsc_ioctl_chpd(void __user * user_chpd)657 static int chsc_ioctl_chpd(void __user *user_chpd)
658 {
659 struct chsc_cpd_info *chpd;
660 int ret;
661
662 chpd = kzalloc(sizeof(*chpd), GFP_KERNEL);
663 if (!chpd)
664 return -ENOMEM;
665 if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) {
666 ret = -EFAULT;
667 goto out_free;
668 }
669 ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt,
670 chpd->rfmt, chpd->c, chpd->m,
671 &chpd->chpdb);
672 if (ret)
673 goto out_free;
674 if (copy_to_user(user_chpd, chpd, sizeof(*chpd)))
675 ret = -EFAULT;
676 out_free:
677 kfree(chpd);
678 return ret;
679 }
680
chsc_ioctl_dcal(void __user * user_dcal)681 static int chsc_ioctl_dcal(void __user *user_dcal)
682 {
683 struct chsc_dcal *dcal;
684 int ret, ccode;
685 struct {
686 struct chsc_header request;
687 u32 atype : 8;
688 u32 : 4;
689 u32 fmt : 4;
690 u32 : 16;
691 u32 res0[2];
692 u32 list_parm[2];
693 u32 res1[2];
694 struct chsc_header response;
695 u8 data[PAGE_SIZE - 36];
696 } __attribute__ ((packed)) *sdcal_area;
697
698 sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
699 if (!sdcal_area)
700 return -ENOMEM;
701 dcal = kzalloc(sizeof(*dcal), GFP_KERNEL);
702 if (!dcal) {
703 ret = -ENOMEM;
704 goto out_free;
705 }
706 if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) {
707 ret = -EFAULT;
708 goto out_free;
709 }
710 sdcal_area->request.length = 0x0020;
711 sdcal_area->request.code = 0x0034;
712 sdcal_area->atype = dcal->req.atype;
713 sdcal_area->fmt = dcal->req.fmt;
714 memcpy(&sdcal_area->list_parm, &dcal->req.list_parm,
715 sizeof(sdcal_area->list_parm));
716
717 ccode = chsc(sdcal_area);
718 if (ccode != 0) {
719 ret = -EIO;
720 goto out_free;
721 }
722 if (sdcal_area->response.code != 0x0001) {
723 ret = -EIO;
724 CHSC_MSG(0, "sdcal: response code=%x\n",
725 sdcal_area->response.code);
726 goto out_free;
727 }
728 memcpy(&dcal->sdcal, &sdcal_area->response,
729 sdcal_area->response.length);
730 if (copy_to_user(user_dcal, dcal, sizeof(*dcal)))
731 ret = -EFAULT;
732 else
733 ret = 0;
734 out_free:
735 kfree(dcal);
736 free_page((unsigned long)sdcal_area);
737 return ret;
738 }
739
chsc_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)740 static long chsc_ioctl(struct file *filp, unsigned int cmd,
741 unsigned long arg)
742 {
743 CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd);
744 switch (cmd) {
745 case CHSC_START:
746 return chsc_ioctl_start((void __user *)arg);
747 case CHSC_INFO_CHANNEL_PATH:
748 return chsc_ioctl_info_channel_path((void __user *)arg);
749 case CHSC_INFO_CU:
750 return chsc_ioctl_info_cu((void __user *)arg);
751 case CHSC_INFO_SCH_CU:
752 return chsc_ioctl_info_sch_cu((void __user *)arg);
753 case CHSC_INFO_CI:
754 return chsc_ioctl_conf_info((void __user *)arg);
755 case CHSC_INFO_CCL:
756 return chsc_ioctl_conf_comp_list((void __user *)arg);
757 case CHSC_INFO_CPD:
758 return chsc_ioctl_chpd((void __user *)arg);
759 case CHSC_INFO_DCAL:
760 return chsc_ioctl_dcal((void __user *)arg);
761 default: /* unknown ioctl number */
762 return -ENOIOCTLCMD;
763 }
764 }
765
766 static const struct file_operations chsc_fops = {
767 .owner = THIS_MODULE,
768 .unlocked_ioctl = chsc_ioctl,
769 .compat_ioctl = chsc_ioctl,
770 };
771
772 static struct miscdevice chsc_misc_device = {
773 .minor = MISC_DYNAMIC_MINOR,
774 .name = "chsc",
775 .fops = &chsc_fops,
776 };
777
chsc_misc_init(void)778 static int __init chsc_misc_init(void)
779 {
780 return misc_register(&chsc_misc_device);
781 }
782
chsc_misc_cleanup(void)783 static void chsc_misc_cleanup(void)
784 {
785 misc_deregister(&chsc_misc_device);
786 }
787
chsc_sch_init(void)788 static int __init chsc_sch_init(void)
789 {
790 int ret;
791
792 ret = chsc_init_dbfs();
793 if (ret)
794 return ret;
795 isc_register(CHSC_SCH_ISC);
796 ret = chsc_init_sch_driver();
797 if (ret)
798 goto out_dbf;
799 ret = chsc_misc_init();
800 if (ret)
801 goto out_driver;
802 return ret;
803 out_driver:
804 chsc_cleanup_sch_driver();
805 out_dbf:
806 isc_unregister(CHSC_SCH_ISC);
807 chsc_remove_dbfs();
808 return ret;
809 }
810
chsc_sch_exit(void)811 static void __exit chsc_sch_exit(void)
812 {
813 chsc_misc_cleanup();
814 chsc_cleanup_sch_driver();
815 isc_unregister(CHSC_SCH_ISC);
816 chsc_remove_dbfs();
817 }
818
819 module_init(chsc_sch_init);
820 module_exit(chsc_sch_exit);
821