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9d92a7e1 CH |
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 | ||
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 | ||
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)); | |
cdb912a4 | 64 | cio_update_schib(sch); |
9d92a7e1 CH |
65 | complete(&request->completion); |
66 | put_device(&sch->dev); | |
67 | } | |
68 | ||
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 | ||
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 | ||
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 | ||
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 | ||
151 | static void chsc_remove_dbfs(void) | |
152 | { | |
153 | debug_unregister(chsc_debug_log_id); | |
154 | debug_unregister(chsc_debug_msg_id); | |
155 | } | |
156 | ||
157 | static int __init chsc_init_sch_driver(void) | |
158 | { | |
159 | return css_driver_register(&chsc_subchannel_driver); | |
160 | } | |
161 | ||
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 | ||
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 | ||
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 | */ | |
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 | ||
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 | ||
260 | static int chsc_examine_irb(struct chsc_request *request) | |
261 | { | |
262 | int backed_up; | |
263 | ||
b2bbb642 | 264 | if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND)) |
9d92a7e1 CH |
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
778 | static int __init chsc_misc_init(void) | |
779 | { | |
780 | return misc_register(&chsc_misc_device); | |
781 | } | |
782 | ||
783 | static void chsc_misc_cleanup(void) | |
784 | { | |
785 | misc_deregister(&chsc_misc_device); | |
786 | } | |
787 | ||
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 | ||
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); |