Commit | Line | Data |
---|---|---|
9d92a7e1 CH |
1 | /* |
2 | * Driver for s390 chsc subchannels | |
3 | * | |
ad285ae9 CH |
4 | * Copyright IBM Corp. 2008, 2009 |
5 | * | |
9d92a7e1 CH |
6 | * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> |
7 | * | |
8 | */ | |
9 | ||
10 | #include <linux/device.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/uaccess.h> | |
13 | #include <linux/miscdevice.h> | |
14 | ||
44ee6a85 | 15 | #include <asm/compat.h> |
9d92a7e1 CH |
16 | #include <asm/cio.h> |
17 | #include <asm/chsc.h> | |
18 | #include <asm/isc.h> | |
19 | ||
20 | #include "cio.h" | |
21 | #include "cio_debug.h" | |
22 | #include "css.h" | |
23 | #include "chsc_sch.h" | |
24 | #include "ioasm.h" | |
25 | ||
26 | static debug_info_t *chsc_debug_msg_id; | |
27 | static debug_info_t *chsc_debug_log_id; | |
28 | ||
29 | #define CHSC_MSG(imp, args...) do { \ | |
30 | debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \ | |
31 | } while (0) | |
32 | ||
33 | #define CHSC_LOG(imp, txt) do { \ | |
34 | debug_text_event(chsc_debug_log_id, imp , txt); \ | |
35 | } while (0) | |
36 | ||
37 | static void CHSC_LOG_HEX(int level, void *data, int length) | |
38 | { | |
39 | while (length > 0) { | |
40 | debug_event(chsc_debug_log_id, level, data, length); | |
41 | length -= chsc_debug_log_id->buf_size; | |
42 | data += chsc_debug_log_id->buf_size; | |
43 | } | |
44 | } | |
45 | ||
46 | MODULE_AUTHOR("IBM Corporation"); | |
47 | MODULE_DESCRIPTION("driver for s390 chsc subchannels"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
50 | static void chsc_subchannel_irq(struct subchannel *sch) | |
51 | { | |
52 | struct chsc_private *private = sch->private; | |
53 | struct chsc_request *request = private->request; | |
54 | struct irb *irb = (struct irb *)__LC_IRB; | |
55 | ||
56 | CHSC_LOG(4, "irb"); | |
57 | CHSC_LOG_HEX(4, irb, sizeof(*irb)); | |
58 | /* Copy irb to provided request and set done. */ | |
59 | if (!request) { | |
60 | CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n", | |
61 | sch->schid.ssid, sch->schid.sch_no); | |
62 | return; | |
63 | } | |
64 | private->request = NULL; | |
65 | memcpy(&request->irb, irb, sizeof(*irb)); | |
cdb912a4 | 66 | cio_update_schib(sch); |
9d92a7e1 CH |
67 | complete(&request->completion); |
68 | put_device(&sch->dev); | |
69 | } | |
70 | ||
71 | static int chsc_subchannel_probe(struct subchannel *sch) | |
72 | { | |
73 | struct chsc_private *private; | |
74 | int ret; | |
75 | ||
76 | CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n", | |
77 | sch->schid.ssid, sch->schid.sch_no); | |
78 | sch->isc = CHSC_SCH_ISC; | |
79 | private = kzalloc(sizeof(*private), GFP_KERNEL); | |
80 | if (!private) | |
81 | return -ENOMEM; | |
82 | ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch); | |
83 | if (ret) { | |
84 | CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n", | |
85 | sch->schid.ssid, sch->schid.sch_no, ret); | |
86 | kfree(private); | |
87 | } else { | |
88 | sch->private = private; | |
f67f129e ML |
89 | if (dev_get_uevent_suppress(&sch->dev)) { |
90 | dev_set_uevent_suppress(&sch->dev, 0); | |
9d92a7e1 CH |
91 | kobject_uevent(&sch->dev.kobj, KOBJ_ADD); |
92 | } | |
93 | } | |
94 | return ret; | |
95 | } | |
96 | ||
97 | static int chsc_subchannel_remove(struct subchannel *sch) | |
98 | { | |
99 | struct chsc_private *private; | |
100 | ||
101 | cio_disable_subchannel(sch); | |
102 | private = sch->private; | |
103 | sch->private = NULL; | |
104 | if (private->request) { | |
105 | complete(&private->request->completion); | |
106 | put_device(&sch->dev); | |
107 | } | |
108 | kfree(private); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | static void chsc_subchannel_shutdown(struct subchannel *sch) | |
113 | { | |
114 | cio_disable_subchannel(sch); | |
115 | } | |
116 | ||
ad285ae9 CH |
117 | static int chsc_subchannel_prepare(struct subchannel *sch) |
118 | { | |
119 | int cc; | |
120 | struct schib schib; | |
121 | /* | |
122 | * Don't allow suspend while the subchannel is not idle | |
123 | * since we don't have a way to clear the subchannel and | |
124 | * cannot disable it with a request running. | |
125 | */ | |
126 | cc = stsch(sch->schid, &schib); | |
127 | if (!cc && scsw_stctl(&schib.scsw)) | |
128 | return -EAGAIN; | |
129 | return 0; | |
130 | } | |
131 | ||
132 | static int chsc_subchannel_freeze(struct subchannel *sch) | |
133 | { | |
134 | return cio_disable_subchannel(sch); | |
135 | } | |
136 | ||
137 | static int chsc_subchannel_restore(struct subchannel *sch) | |
138 | { | |
139 | return cio_enable_subchannel(sch, (u32)(unsigned long)sch); | |
140 | } | |
141 | ||
9d92a7e1 CH |
142 | static struct css_device_id chsc_subchannel_ids[] = { |
143 | { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, }, | |
144 | { /* end of list */ }, | |
145 | }; | |
146 | MODULE_DEVICE_TABLE(css, chsc_subchannel_ids); | |
147 | ||
148 | static struct css_driver chsc_subchannel_driver = { | |
149 | .owner = THIS_MODULE, | |
150 | .subchannel_type = chsc_subchannel_ids, | |
151 | .irq = chsc_subchannel_irq, | |
152 | .probe = chsc_subchannel_probe, | |
153 | .remove = chsc_subchannel_remove, | |
154 | .shutdown = chsc_subchannel_shutdown, | |
ad285ae9 CH |
155 | .prepare = chsc_subchannel_prepare, |
156 | .freeze = chsc_subchannel_freeze, | |
157 | .thaw = chsc_subchannel_restore, | |
158 | .restore = chsc_subchannel_restore, | |
9d92a7e1 CH |
159 | .name = "chsc_subchannel", |
160 | }; | |
161 | ||
162 | static int __init chsc_init_dbfs(void) | |
163 | { | |
164 | chsc_debug_msg_id = debug_register("chsc_msg", 16, 1, | |
165 | 16 * sizeof(long)); | |
166 | if (!chsc_debug_msg_id) | |
167 | goto out; | |
168 | debug_register_view(chsc_debug_msg_id, &debug_sprintf_view); | |
169 | debug_set_level(chsc_debug_msg_id, 2); | |
170 | chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16); | |
171 | if (!chsc_debug_log_id) | |
172 | goto out; | |
173 | debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view); | |
174 | debug_set_level(chsc_debug_log_id, 2); | |
175 | return 0; | |
176 | out: | |
177 | if (chsc_debug_msg_id) | |
178 | debug_unregister(chsc_debug_msg_id); | |
179 | return -ENOMEM; | |
180 | } | |
181 | ||
182 | static void chsc_remove_dbfs(void) | |
183 | { | |
184 | debug_unregister(chsc_debug_log_id); | |
185 | debug_unregister(chsc_debug_msg_id); | |
186 | } | |
187 | ||
188 | static int __init chsc_init_sch_driver(void) | |
189 | { | |
190 | return css_driver_register(&chsc_subchannel_driver); | |
191 | } | |
192 | ||
193 | static void chsc_cleanup_sch_driver(void) | |
194 | { | |
195 | css_driver_unregister(&chsc_subchannel_driver); | |
196 | } | |
197 | ||
198 | static DEFINE_SPINLOCK(chsc_lock); | |
199 | ||
200 | static int chsc_subchannel_match_next_free(struct device *dev, void *data) | |
201 | { | |
202 | struct subchannel *sch = to_subchannel(dev); | |
203 | ||
204 | return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw); | |
205 | } | |
206 | ||
207 | static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch) | |
208 | { | |
209 | struct device *dev; | |
210 | ||
211 | dev = driver_find_device(&chsc_subchannel_driver.drv, | |
212 | sch ? &sch->dev : NULL, NULL, | |
213 | chsc_subchannel_match_next_free); | |
214 | return dev ? to_subchannel(dev) : NULL; | |
215 | } | |
216 | ||
217 | /** | |
218 | * chsc_async() - try to start a chsc request asynchronously | |
219 | * @chsc_area: request to be started | |
220 | * @request: request structure to associate | |
221 | * | |
222 | * Tries to start a chsc request on one of the existing chsc subchannels. | |
223 | * Returns: | |
224 | * %0 if the request was performed synchronously | |
225 | * %-EINPROGRESS if the request was successfully started | |
226 | * %-EBUSY if all chsc subchannels are busy | |
227 | * %-ENODEV if no chsc subchannels are available | |
228 | * Context: | |
229 | * interrupts disabled, chsc_lock held | |
230 | */ | |
231 | static int chsc_async(struct chsc_async_area *chsc_area, | |
232 | struct chsc_request *request) | |
233 | { | |
234 | int cc; | |
235 | struct chsc_private *private; | |
236 | struct subchannel *sch = NULL; | |
237 | int ret = -ENODEV; | |
238 | char dbf[10]; | |
239 | ||
240 | chsc_area->header.key = PAGE_DEFAULT_KEY; | |
241 | while ((sch = chsc_get_next_subchannel(sch))) { | |
242 | spin_lock(sch->lock); | |
243 | private = sch->private; | |
244 | if (private->request) { | |
245 | spin_unlock(sch->lock); | |
246 | ret = -EBUSY; | |
247 | continue; | |
248 | } | |
249 | chsc_area->header.sid = sch->schid; | |
250 | CHSC_LOG(2, "schid"); | |
251 | CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid)); | |
252 | cc = chsc(chsc_area); | |
253 | sprintf(dbf, "cc:%d", cc); | |
254 | CHSC_LOG(2, dbf); | |
255 | switch (cc) { | |
256 | case 0: | |
257 | ret = 0; | |
258 | break; | |
259 | case 1: | |
260 | sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC; | |
261 | ret = -EINPROGRESS; | |
262 | private->request = request; | |
263 | break; | |
264 | case 2: | |
265 | ret = -EBUSY; | |
266 | break; | |
267 | default: | |
268 | ret = -ENODEV; | |
269 | } | |
270 | spin_unlock(sch->lock); | |
271 | CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n", | |
272 | sch->schid.ssid, sch->schid.sch_no, cc); | |
273 | if (ret == -EINPROGRESS) | |
274 | return -EINPROGRESS; | |
275 | put_device(&sch->dev); | |
276 | if (ret == 0) | |
277 | return 0; | |
278 | } | |
279 | return ret; | |
280 | } | |
281 | ||
282 | static void chsc_log_command(struct chsc_async_area *chsc_area) | |
283 | { | |
284 | char dbf[10]; | |
285 | ||
286 | sprintf(dbf, "CHSC:%x", chsc_area->header.code); | |
287 | CHSC_LOG(0, dbf); | |
288 | CHSC_LOG_HEX(0, chsc_area, 32); | |
289 | } | |
290 | ||
291 | static int chsc_examine_irb(struct chsc_request *request) | |
292 | { | |
293 | int backed_up; | |
294 | ||
b2bbb642 | 295 | if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND)) |
9d92a7e1 CH |
296 | return -EIO; |
297 | backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK; | |
298 | request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK; | |
299 | if (scsw_cstat(&request->irb.scsw) == 0) | |
300 | return 0; | |
301 | if (!backed_up) | |
302 | return 0; | |
303 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK) | |
304 | return -EIO; | |
305 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK) | |
306 | return -EPERM; | |
307 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK) | |
308 | return -EAGAIN; | |
309 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK) | |
310 | return -EAGAIN; | |
311 | return -EIO; | |
312 | } | |
313 | ||
314 | static int chsc_ioctl_start(void __user *user_area) | |
315 | { | |
316 | struct chsc_request *request; | |
317 | struct chsc_async_area *chsc_area; | |
318 | int ret; | |
319 | char dbf[10]; | |
320 | ||
321 | if (!css_general_characteristics.dynio) | |
322 | /* It makes no sense to try. */ | |
323 | return -EOPNOTSUPP; | |
324 | chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); | |
325 | if (!chsc_area) | |
326 | return -ENOMEM; | |
327 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
328 | if (!request) { | |
329 | ret = -ENOMEM; | |
330 | goto out_free; | |
331 | } | |
332 | init_completion(&request->completion); | |
333 | if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { | |
334 | ret = -EFAULT; | |
335 | goto out_free; | |
336 | } | |
337 | chsc_log_command(chsc_area); | |
338 | spin_lock_irq(&chsc_lock); | |
339 | ret = chsc_async(chsc_area, request); | |
340 | spin_unlock_irq(&chsc_lock); | |
341 | if (ret == -EINPROGRESS) { | |
342 | wait_for_completion(&request->completion); | |
343 | ret = chsc_examine_irb(request); | |
344 | } | |
345 | /* copy area back to user */ | |
346 | if (!ret) | |
347 | if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) | |
348 | ret = -EFAULT; | |
349 | out_free: | |
350 | sprintf(dbf, "ret:%d", ret); | |
351 | CHSC_LOG(0, dbf); | |
352 | kfree(request); | |
353 | free_page((unsigned long)chsc_area); | |
354 | return ret; | |
355 | } | |
356 | ||
357 | static int chsc_ioctl_info_channel_path(void __user *user_cd) | |
358 | { | |
359 | struct chsc_chp_cd *cd; | |
360 | int ret, ccode; | |
361 | struct { | |
362 | struct chsc_header request; | |
363 | u32 : 2; | |
364 | u32 m : 1; | |
365 | u32 : 1; | |
366 | u32 fmt1 : 4; | |
367 | u32 cssid : 8; | |
368 | u32 : 8; | |
369 | u32 first_chpid : 8; | |
370 | u32 : 24; | |
371 | u32 last_chpid : 8; | |
372 | u32 : 32; | |
373 | struct chsc_header response; | |
374 | u8 data[PAGE_SIZE - 20]; | |
375 | } __attribute__ ((packed)) *scpcd_area; | |
376 | ||
377 | scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
378 | if (!scpcd_area) | |
379 | return -ENOMEM; | |
380 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
381 | if (!cd) { | |
382 | ret = -ENOMEM; | |
383 | goto out_free; | |
384 | } | |
385 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
386 | ret = -EFAULT; | |
387 | goto out_free; | |
388 | } | |
389 | scpcd_area->request.length = 0x0010; | |
390 | scpcd_area->request.code = 0x0028; | |
391 | scpcd_area->m = cd->m; | |
392 | scpcd_area->fmt1 = cd->fmt; | |
393 | scpcd_area->cssid = cd->chpid.cssid; | |
394 | scpcd_area->first_chpid = cd->chpid.id; | |
395 | scpcd_area->last_chpid = cd->chpid.id; | |
396 | ||
397 | ccode = chsc(scpcd_area); | |
398 | if (ccode != 0) { | |
399 | ret = -EIO; | |
400 | goto out_free; | |
401 | } | |
402 | if (scpcd_area->response.code != 0x0001) { | |
403 | ret = -EIO; | |
404 | CHSC_MSG(0, "scpcd: response code=%x\n", | |
405 | scpcd_area->response.code); | |
406 | goto out_free; | |
407 | } | |
408 | memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length); | |
409 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
410 | ret = -EFAULT; | |
411 | else | |
412 | ret = 0; | |
413 | out_free: | |
414 | kfree(cd); | |
415 | free_page((unsigned long)scpcd_area); | |
416 | return ret; | |
417 | } | |
418 | ||
419 | static int chsc_ioctl_info_cu(void __user *user_cd) | |
420 | { | |
421 | struct chsc_cu_cd *cd; | |
422 | int ret, ccode; | |
423 | struct { | |
424 | struct chsc_header request; | |
425 | u32 : 2; | |
426 | u32 m : 1; | |
427 | u32 : 1; | |
428 | u32 fmt1 : 4; | |
429 | u32 cssid : 8; | |
430 | u32 : 8; | |
431 | u32 first_cun : 8; | |
432 | u32 : 24; | |
433 | u32 last_cun : 8; | |
434 | u32 : 32; | |
435 | struct chsc_header response; | |
436 | u8 data[PAGE_SIZE - 20]; | |
437 | } __attribute__ ((packed)) *scucd_area; | |
438 | ||
439 | scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
440 | if (!scucd_area) | |
441 | return -ENOMEM; | |
442 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
443 | if (!cd) { | |
444 | ret = -ENOMEM; | |
445 | goto out_free; | |
446 | } | |
447 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
448 | ret = -EFAULT; | |
449 | goto out_free; | |
450 | } | |
451 | scucd_area->request.length = 0x0010; | |
452 | scucd_area->request.code = 0x0028; | |
453 | scucd_area->m = cd->m; | |
454 | scucd_area->fmt1 = cd->fmt; | |
455 | scucd_area->cssid = cd->cssid; | |
456 | scucd_area->first_cun = cd->cun; | |
457 | scucd_area->last_cun = cd->cun; | |
458 | ||
459 | ccode = chsc(scucd_area); | |
460 | if (ccode != 0) { | |
461 | ret = -EIO; | |
462 | goto out_free; | |
463 | } | |
464 | if (scucd_area->response.code != 0x0001) { | |
465 | ret = -EIO; | |
466 | CHSC_MSG(0, "scucd: response code=%x\n", | |
467 | scucd_area->response.code); | |
468 | goto out_free; | |
469 | } | |
470 | memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length); | |
471 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
472 | ret = -EFAULT; | |
473 | else | |
474 | ret = 0; | |
475 | out_free: | |
476 | kfree(cd); | |
477 | free_page((unsigned long)scucd_area); | |
478 | return ret; | |
479 | } | |
480 | ||
481 | static int chsc_ioctl_info_sch_cu(void __user *user_cud) | |
482 | { | |
483 | struct chsc_sch_cud *cud; | |
484 | int ret, ccode; | |
485 | struct { | |
486 | struct chsc_header request; | |
487 | u32 : 2; | |
488 | u32 m : 1; | |
489 | u32 : 5; | |
490 | u32 fmt1 : 4; | |
491 | u32 : 2; | |
492 | u32 ssid : 2; | |
493 | u32 first_sch : 16; | |
494 | u32 : 8; | |
495 | u32 cssid : 8; | |
496 | u32 last_sch : 16; | |
497 | u32 : 32; | |
498 | struct chsc_header response; | |
499 | u8 data[PAGE_SIZE - 20]; | |
500 | } __attribute__ ((packed)) *sscud_area; | |
501 | ||
502 | sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
503 | if (!sscud_area) | |
504 | return -ENOMEM; | |
505 | cud = kzalloc(sizeof(*cud), GFP_KERNEL); | |
506 | if (!cud) { | |
507 | ret = -ENOMEM; | |
508 | goto out_free; | |
509 | } | |
510 | if (copy_from_user(cud, user_cud, sizeof(*cud))) { | |
511 | ret = -EFAULT; | |
512 | goto out_free; | |
513 | } | |
514 | sscud_area->request.length = 0x0010; | |
515 | sscud_area->request.code = 0x0006; | |
516 | sscud_area->m = cud->schid.m; | |
517 | sscud_area->fmt1 = cud->fmt; | |
518 | sscud_area->ssid = cud->schid.ssid; | |
519 | sscud_area->first_sch = cud->schid.sch_no; | |
520 | sscud_area->cssid = cud->schid.cssid; | |
521 | sscud_area->last_sch = cud->schid.sch_no; | |
522 | ||
523 | ccode = chsc(sscud_area); | |
524 | if (ccode != 0) { | |
525 | ret = -EIO; | |
526 | goto out_free; | |
527 | } | |
528 | if (sscud_area->response.code != 0x0001) { | |
529 | ret = -EIO; | |
530 | CHSC_MSG(0, "sscud: response code=%x\n", | |
531 | sscud_area->response.code); | |
532 | goto out_free; | |
533 | } | |
534 | memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length); | |
535 | if (copy_to_user(user_cud, cud, sizeof(*cud))) | |
536 | ret = -EFAULT; | |
537 | else | |
538 | ret = 0; | |
539 | out_free: | |
540 | kfree(cud); | |
541 | free_page((unsigned long)sscud_area); | |
542 | return ret; | |
543 | } | |
544 | ||
545 | static int chsc_ioctl_conf_info(void __user *user_ci) | |
546 | { | |
547 | struct chsc_conf_info *ci; | |
548 | int ret, ccode; | |
549 | struct { | |
550 | struct chsc_header request; | |
551 | u32 : 2; | |
552 | u32 m : 1; | |
553 | u32 : 1; | |
554 | u32 fmt1 : 4; | |
555 | u32 cssid : 8; | |
556 | u32 : 6; | |
557 | u32 ssid : 2; | |
558 | u32 : 8; | |
559 | u64 : 64; | |
560 | struct chsc_header response; | |
561 | u8 data[PAGE_SIZE - 20]; | |
562 | } __attribute__ ((packed)) *sci_area; | |
563 | ||
564 | sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
565 | if (!sci_area) | |
566 | return -ENOMEM; | |
567 | ci = kzalloc(sizeof(*ci), GFP_KERNEL); | |
568 | if (!ci) { | |
569 | ret = -ENOMEM; | |
570 | goto out_free; | |
571 | } | |
572 | if (copy_from_user(ci, user_ci, sizeof(*ci))) { | |
573 | ret = -EFAULT; | |
574 | goto out_free; | |
575 | } | |
576 | sci_area->request.length = 0x0010; | |
577 | sci_area->request.code = 0x0012; | |
578 | sci_area->m = ci->id.m; | |
579 | sci_area->fmt1 = ci->fmt; | |
580 | sci_area->cssid = ci->id.cssid; | |
581 | sci_area->ssid = ci->id.ssid; | |
582 | ||
583 | ccode = chsc(sci_area); | |
584 | if (ccode != 0) { | |
585 | ret = -EIO; | |
586 | goto out_free; | |
587 | } | |
588 | if (sci_area->response.code != 0x0001) { | |
589 | ret = -EIO; | |
590 | CHSC_MSG(0, "sci: response code=%x\n", | |
591 | sci_area->response.code); | |
592 | goto out_free; | |
593 | } | |
594 | memcpy(&ci->scid, &sci_area->response, sci_area->response.length); | |
595 | if (copy_to_user(user_ci, ci, sizeof(*ci))) | |
596 | ret = -EFAULT; | |
597 | else | |
598 | ret = 0; | |
599 | out_free: | |
600 | kfree(ci); | |
601 | free_page((unsigned long)sci_area); | |
602 | return ret; | |
603 | } | |
604 | ||
605 | static int chsc_ioctl_conf_comp_list(void __user *user_ccl) | |
606 | { | |
607 | struct chsc_comp_list *ccl; | |
608 | int ret, ccode; | |
609 | struct { | |
610 | struct chsc_header request; | |
611 | u32 ctype : 8; | |
612 | u32 : 4; | |
613 | u32 fmt : 4; | |
614 | u32 : 16; | |
615 | u64 : 64; | |
616 | u32 list_parm[2]; | |
617 | u64 : 64; | |
618 | struct chsc_header response; | |
619 | u8 data[PAGE_SIZE - 36]; | |
620 | } __attribute__ ((packed)) *sccl_area; | |
621 | struct { | |
622 | u32 m : 1; | |
623 | u32 : 31; | |
624 | u32 cssid : 8; | |
625 | u32 : 16; | |
626 | u32 chpid : 8; | |
627 | } __attribute__ ((packed)) *chpid_parm; | |
628 | struct { | |
629 | u32 f_cssid : 8; | |
630 | u32 l_cssid : 8; | |
631 | u32 : 16; | |
632 | u32 res; | |
633 | } __attribute__ ((packed)) *cssids_parm; | |
634 | ||
635 | sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
636 | if (!sccl_area) | |
637 | return -ENOMEM; | |
638 | ccl = kzalloc(sizeof(*ccl), GFP_KERNEL); | |
639 | if (!ccl) { | |
640 | ret = -ENOMEM; | |
641 | goto out_free; | |
642 | } | |
643 | if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) { | |
644 | ret = -EFAULT; | |
645 | goto out_free; | |
646 | } | |
647 | sccl_area->request.length = 0x0020; | |
648 | sccl_area->request.code = 0x0030; | |
649 | sccl_area->fmt = ccl->req.fmt; | |
650 | sccl_area->ctype = ccl->req.ctype; | |
651 | switch (sccl_area->ctype) { | |
652 | case CCL_CU_ON_CHP: | |
653 | case CCL_IOP_CHP: | |
654 | chpid_parm = (void *)&sccl_area->list_parm; | |
655 | chpid_parm->m = ccl->req.chpid.m; | |
656 | chpid_parm->cssid = ccl->req.chpid.chp.cssid; | |
657 | chpid_parm->chpid = ccl->req.chpid.chp.id; | |
658 | break; | |
659 | case CCL_CSS_IMG: | |
660 | case CCL_CSS_IMG_CONF_CHAR: | |
661 | cssids_parm = (void *)&sccl_area->list_parm; | |
662 | cssids_parm->f_cssid = ccl->req.cssids.f_cssid; | |
663 | cssids_parm->l_cssid = ccl->req.cssids.l_cssid; | |
664 | break; | |
665 | } | |
666 | ccode = chsc(sccl_area); | |
667 | if (ccode != 0) { | |
668 | ret = -EIO; | |
669 | goto out_free; | |
670 | } | |
671 | if (sccl_area->response.code != 0x0001) { | |
672 | ret = -EIO; | |
673 | CHSC_MSG(0, "sccl: response code=%x\n", | |
674 | sccl_area->response.code); | |
675 | goto out_free; | |
676 | } | |
677 | memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length); | |
678 | if (copy_to_user(user_ccl, ccl, sizeof(*ccl))) | |
679 | ret = -EFAULT; | |
680 | else | |
681 | ret = 0; | |
682 | out_free: | |
683 | kfree(ccl); | |
684 | free_page((unsigned long)sccl_area); | |
685 | return ret; | |
686 | } | |
687 | ||
688 | static int chsc_ioctl_chpd(void __user *user_chpd) | |
689 | { | |
690 | struct chsc_cpd_info *chpd; | |
691 | int ret; | |
692 | ||
693 | chpd = kzalloc(sizeof(*chpd), GFP_KERNEL); | |
694 | if (!chpd) | |
695 | return -ENOMEM; | |
696 | if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) { | |
697 | ret = -EFAULT; | |
698 | goto out_free; | |
699 | } | |
700 | ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt, | |
701 | chpd->rfmt, chpd->c, chpd->m, | |
702 | &chpd->chpdb); | |
703 | if (ret) | |
704 | goto out_free; | |
705 | if (copy_to_user(user_chpd, chpd, sizeof(*chpd))) | |
706 | ret = -EFAULT; | |
707 | out_free: | |
708 | kfree(chpd); | |
709 | return ret; | |
710 | } | |
711 | ||
712 | static int chsc_ioctl_dcal(void __user *user_dcal) | |
713 | { | |
714 | struct chsc_dcal *dcal; | |
715 | int ret, ccode; | |
716 | struct { | |
717 | struct chsc_header request; | |
718 | u32 atype : 8; | |
719 | u32 : 4; | |
720 | u32 fmt : 4; | |
721 | u32 : 16; | |
722 | u32 res0[2]; | |
723 | u32 list_parm[2]; | |
724 | u32 res1[2]; | |
725 | struct chsc_header response; | |
726 | u8 data[PAGE_SIZE - 36]; | |
727 | } __attribute__ ((packed)) *sdcal_area; | |
728 | ||
729 | sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
730 | if (!sdcal_area) | |
731 | return -ENOMEM; | |
732 | dcal = kzalloc(sizeof(*dcal), GFP_KERNEL); | |
733 | if (!dcal) { | |
734 | ret = -ENOMEM; | |
735 | goto out_free; | |
736 | } | |
737 | if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) { | |
738 | ret = -EFAULT; | |
739 | goto out_free; | |
740 | } | |
741 | sdcal_area->request.length = 0x0020; | |
742 | sdcal_area->request.code = 0x0034; | |
743 | sdcal_area->atype = dcal->req.atype; | |
744 | sdcal_area->fmt = dcal->req.fmt; | |
745 | memcpy(&sdcal_area->list_parm, &dcal->req.list_parm, | |
746 | sizeof(sdcal_area->list_parm)); | |
747 | ||
748 | ccode = chsc(sdcal_area); | |
749 | if (ccode != 0) { | |
750 | ret = -EIO; | |
751 | goto out_free; | |
752 | } | |
753 | if (sdcal_area->response.code != 0x0001) { | |
754 | ret = -EIO; | |
755 | CHSC_MSG(0, "sdcal: response code=%x\n", | |
756 | sdcal_area->response.code); | |
757 | goto out_free; | |
758 | } | |
759 | memcpy(&dcal->sdcal, &sdcal_area->response, | |
760 | sdcal_area->response.length); | |
761 | if (copy_to_user(user_dcal, dcal, sizeof(*dcal))) | |
762 | ret = -EFAULT; | |
763 | else | |
764 | ret = 0; | |
765 | out_free: | |
766 | kfree(dcal); | |
767 | free_page((unsigned long)sdcal_area); | |
768 | return ret; | |
769 | } | |
770 | ||
771 | static long chsc_ioctl(struct file *filp, unsigned int cmd, | |
772 | unsigned long arg) | |
773 | { | |
44ee6a85 HC |
774 | void __user *argp; |
775 | ||
9d92a7e1 | 776 | CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd); |
44ee6a85 HC |
777 | if (is_compat_task()) |
778 | argp = compat_ptr(arg); | |
779 | else | |
780 | argp = (void __user *)arg; | |
9d92a7e1 CH |
781 | switch (cmd) { |
782 | case CHSC_START: | |
44ee6a85 | 783 | return chsc_ioctl_start(argp); |
9d92a7e1 | 784 | case CHSC_INFO_CHANNEL_PATH: |
44ee6a85 | 785 | return chsc_ioctl_info_channel_path(argp); |
9d92a7e1 | 786 | case CHSC_INFO_CU: |
44ee6a85 | 787 | return chsc_ioctl_info_cu(argp); |
9d92a7e1 | 788 | case CHSC_INFO_SCH_CU: |
44ee6a85 | 789 | return chsc_ioctl_info_sch_cu(argp); |
9d92a7e1 | 790 | case CHSC_INFO_CI: |
44ee6a85 | 791 | return chsc_ioctl_conf_info(argp); |
9d92a7e1 | 792 | case CHSC_INFO_CCL: |
44ee6a85 | 793 | return chsc_ioctl_conf_comp_list(argp); |
9d92a7e1 | 794 | case CHSC_INFO_CPD: |
44ee6a85 | 795 | return chsc_ioctl_chpd(argp); |
9d92a7e1 | 796 | case CHSC_INFO_DCAL: |
44ee6a85 | 797 | return chsc_ioctl_dcal(argp); |
9d92a7e1 CH |
798 | default: /* unknown ioctl number */ |
799 | return -ENOIOCTLCMD; | |
800 | } | |
801 | } | |
802 | ||
803 | static const struct file_operations chsc_fops = { | |
804 | .owner = THIS_MODULE, | |
805 | .unlocked_ioctl = chsc_ioctl, | |
806 | .compat_ioctl = chsc_ioctl, | |
807 | }; | |
808 | ||
809 | static struct miscdevice chsc_misc_device = { | |
810 | .minor = MISC_DYNAMIC_MINOR, | |
811 | .name = "chsc", | |
812 | .fops = &chsc_fops, | |
813 | }; | |
814 | ||
815 | static int __init chsc_misc_init(void) | |
816 | { | |
817 | return misc_register(&chsc_misc_device); | |
818 | } | |
819 | ||
820 | static void chsc_misc_cleanup(void) | |
821 | { | |
822 | misc_deregister(&chsc_misc_device); | |
823 | } | |
824 | ||
825 | static int __init chsc_sch_init(void) | |
826 | { | |
827 | int ret; | |
828 | ||
829 | ret = chsc_init_dbfs(); | |
830 | if (ret) | |
831 | return ret; | |
832 | isc_register(CHSC_SCH_ISC); | |
833 | ret = chsc_init_sch_driver(); | |
834 | if (ret) | |
835 | goto out_dbf; | |
836 | ret = chsc_misc_init(); | |
837 | if (ret) | |
838 | goto out_driver; | |
839 | return ret; | |
840 | out_driver: | |
841 | chsc_cleanup_sch_driver(); | |
842 | out_dbf: | |
843 | isc_unregister(CHSC_SCH_ISC); | |
844 | chsc_remove_dbfs(); | |
845 | return ret; | |
846 | } | |
847 | ||
848 | static void __exit chsc_sch_exit(void) | |
849 | { | |
850 | chsc_misc_cleanup(); | |
851 | chsc_cleanup_sch_driver(); | |
852 | isc_unregister(CHSC_SCH_ISC); | |
853 | chsc_remove_dbfs(); | |
854 | } | |
855 | ||
856 | module_init(chsc_sch_init); | |
857 | module_exit(chsc_sch_exit); |