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Commit | Line | Data |
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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 | ||
5a0e3ad6 | 10 | #include <linux/slab.h> |
9d92a7e1 CH |
11 | #include <linux/device.h> |
12 | #include <linux/module.h> | |
13 | #include <linux/uaccess.h> | |
14 | #include <linux/miscdevice.h> | |
15 | ||
44ee6a85 | 16 | #include <asm/compat.h> |
9d92a7e1 CH |
17 | #include <asm/cio.h> |
18 | #include <asm/chsc.h> | |
19 | #include <asm/isc.h> | |
20 | ||
21 | #include "cio.h" | |
22 | #include "cio_debug.h" | |
23 | #include "css.h" | |
24 | #include "chsc_sch.h" | |
25 | #include "ioasm.h" | |
26 | ||
27 | static debug_info_t *chsc_debug_msg_id; | |
28 | static debug_info_t *chsc_debug_log_id; | |
29 | ||
30 | #define CHSC_MSG(imp, args...) do { \ | |
31 | debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \ | |
32 | } while (0) | |
33 | ||
34 | #define CHSC_LOG(imp, txt) do { \ | |
35 | debug_text_event(chsc_debug_log_id, imp , txt); \ | |
36 | } while (0) | |
37 | ||
38 | static void CHSC_LOG_HEX(int level, void *data, int length) | |
39 | { | |
40 | while (length > 0) { | |
41 | debug_event(chsc_debug_log_id, level, data, length); | |
42 | length -= chsc_debug_log_id->buf_size; | |
43 | data += chsc_debug_log_id->buf_size; | |
44 | } | |
45 | } | |
46 | ||
47 | MODULE_AUTHOR("IBM Corporation"); | |
48 | MODULE_DESCRIPTION("driver for s390 chsc subchannels"); | |
49 | MODULE_LICENSE("GPL"); | |
50 | ||
51 | static void chsc_subchannel_irq(struct subchannel *sch) | |
52 | { | |
53 | struct chsc_private *private = sch->private; | |
54 | struct chsc_request *request = private->request; | |
cbb870c8 | 55 | struct irb *irb = (struct irb *)&S390_lowcore.irb; |
9d92a7e1 CH |
56 | |
57 | CHSC_LOG(4, "irb"); | |
58 | CHSC_LOG_HEX(4, irb, sizeof(*irb)); | |
59 | /* Copy irb to provided request and set done. */ | |
60 | if (!request) { | |
61 | CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n", | |
62 | sch->schid.ssid, sch->schid.sch_no); | |
63 | return; | |
64 | } | |
65 | private->request = NULL; | |
66 | memcpy(&request->irb, irb, sizeof(*irb)); | |
cdb912a4 | 67 | cio_update_schib(sch); |
9d92a7e1 CH |
68 | complete(&request->completion); |
69 | put_device(&sch->dev); | |
70 | } | |
71 | ||
72 | static int chsc_subchannel_probe(struct subchannel *sch) | |
73 | { | |
74 | struct chsc_private *private; | |
75 | int ret; | |
76 | ||
77 | CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n", | |
78 | sch->schid.ssid, sch->schid.sch_no); | |
79 | sch->isc = CHSC_SCH_ISC; | |
80 | private = kzalloc(sizeof(*private), GFP_KERNEL); | |
81 | if (!private) | |
82 | return -ENOMEM; | |
83 | ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch); | |
84 | if (ret) { | |
85 | CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n", | |
86 | sch->schid.ssid, sch->schid.sch_no, ret); | |
87 | kfree(private); | |
88 | } else { | |
89 | sch->private = private; | |
f67f129e ML |
90 | if (dev_get_uevent_suppress(&sch->dev)) { |
91 | dev_set_uevent_suppress(&sch->dev, 0); | |
9d92a7e1 CH |
92 | kobject_uevent(&sch->dev.kobj, KOBJ_ADD); |
93 | } | |
94 | } | |
95 | return ret; | |
96 | } | |
97 | ||
98 | static int chsc_subchannel_remove(struct subchannel *sch) | |
99 | { | |
100 | struct chsc_private *private; | |
101 | ||
102 | cio_disable_subchannel(sch); | |
103 | private = sch->private; | |
104 | sch->private = NULL; | |
105 | if (private->request) { | |
106 | complete(&private->request->completion); | |
107 | put_device(&sch->dev); | |
108 | } | |
109 | kfree(private); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static void chsc_subchannel_shutdown(struct subchannel *sch) | |
114 | { | |
115 | cio_disable_subchannel(sch); | |
116 | } | |
117 | ||
ad285ae9 CH |
118 | static int chsc_subchannel_prepare(struct subchannel *sch) |
119 | { | |
120 | int cc; | |
121 | struct schib schib; | |
122 | /* | |
123 | * Don't allow suspend while the subchannel is not idle | |
124 | * since we don't have a way to clear the subchannel and | |
125 | * cannot disable it with a request running. | |
126 | */ | |
127 | cc = stsch(sch->schid, &schib); | |
128 | if (!cc && scsw_stctl(&schib.scsw)) | |
129 | return -EAGAIN; | |
130 | return 0; | |
131 | } | |
132 | ||
133 | static int chsc_subchannel_freeze(struct subchannel *sch) | |
134 | { | |
135 | return cio_disable_subchannel(sch); | |
136 | } | |
137 | ||
138 | static int chsc_subchannel_restore(struct subchannel *sch) | |
139 | { | |
140 | return cio_enable_subchannel(sch, (u32)(unsigned long)sch); | |
141 | } | |
142 | ||
9d92a7e1 CH |
143 | static struct css_device_id chsc_subchannel_ids[] = { |
144 | { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, }, | |
145 | { /* end of list */ }, | |
146 | }; | |
147 | MODULE_DEVICE_TABLE(css, chsc_subchannel_ids); | |
148 | ||
149 | static struct css_driver chsc_subchannel_driver = { | |
150 | .owner = THIS_MODULE, | |
151 | .subchannel_type = chsc_subchannel_ids, | |
152 | .irq = chsc_subchannel_irq, | |
153 | .probe = chsc_subchannel_probe, | |
154 | .remove = chsc_subchannel_remove, | |
155 | .shutdown = chsc_subchannel_shutdown, | |
ad285ae9 CH |
156 | .prepare = chsc_subchannel_prepare, |
157 | .freeze = chsc_subchannel_freeze, | |
158 | .thaw = chsc_subchannel_restore, | |
159 | .restore = chsc_subchannel_restore, | |
9d92a7e1 CH |
160 | .name = "chsc_subchannel", |
161 | }; | |
162 | ||
163 | static int __init chsc_init_dbfs(void) | |
164 | { | |
165 | chsc_debug_msg_id = debug_register("chsc_msg", 16, 1, | |
166 | 16 * sizeof(long)); | |
167 | if (!chsc_debug_msg_id) | |
168 | goto out; | |
169 | debug_register_view(chsc_debug_msg_id, &debug_sprintf_view); | |
170 | debug_set_level(chsc_debug_msg_id, 2); | |
171 | chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16); | |
172 | if (!chsc_debug_log_id) | |
173 | goto out; | |
174 | debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view); | |
175 | debug_set_level(chsc_debug_log_id, 2); | |
176 | return 0; | |
177 | out: | |
178 | if (chsc_debug_msg_id) | |
179 | debug_unregister(chsc_debug_msg_id); | |
180 | return -ENOMEM; | |
181 | } | |
182 | ||
183 | static void chsc_remove_dbfs(void) | |
184 | { | |
185 | debug_unregister(chsc_debug_log_id); | |
186 | debug_unregister(chsc_debug_msg_id); | |
187 | } | |
188 | ||
189 | static int __init chsc_init_sch_driver(void) | |
190 | { | |
191 | return css_driver_register(&chsc_subchannel_driver); | |
192 | } | |
193 | ||
194 | static void chsc_cleanup_sch_driver(void) | |
195 | { | |
196 | css_driver_unregister(&chsc_subchannel_driver); | |
197 | } | |
198 | ||
199 | static DEFINE_SPINLOCK(chsc_lock); | |
200 | ||
201 | static int chsc_subchannel_match_next_free(struct device *dev, void *data) | |
202 | { | |
203 | struct subchannel *sch = to_subchannel(dev); | |
204 | ||
205 | return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw); | |
206 | } | |
207 | ||
208 | static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch) | |
209 | { | |
210 | struct device *dev; | |
211 | ||
212 | dev = driver_find_device(&chsc_subchannel_driver.drv, | |
213 | sch ? &sch->dev : NULL, NULL, | |
214 | chsc_subchannel_match_next_free); | |
215 | return dev ? to_subchannel(dev) : NULL; | |
216 | } | |
217 | ||
218 | /** | |
219 | * chsc_async() - try to start a chsc request asynchronously | |
220 | * @chsc_area: request to be started | |
221 | * @request: request structure to associate | |
222 | * | |
223 | * Tries to start a chsc request on one of the existing chsc subchannels. | |
224 | * Returns: | |
225 | * %0 if the request was performed synchronously | |
226 | * %-EINPROGRESS if the request was successfully started | |
227 | * %-EBUSY if all chsc subchannels are busy | |
228 | * %-ENODEV if no chsc subchannels are available | |
229 | * Context: | |
230 | * interrupts disabled, chsc_lock held | |
231 | */ | |
232 | static int chsc_async(struct chsc_async_area *chsc_area, | |
233 | struct chsc_request *request) | |
234 | { | |
235 | int cc; | |
236 | struct chsc_private *private; | |
237 | struct subchannel *sch = NULL; | |
238 | int ret = -ENODEV; | |
239 | char dbf[10]; | |
240 | ||
d1bf8590 | 241 | chsc_area->header.key = PAGE_DEFAULT_KEY >> 4; |
9d92a7e1 CH |
242 | while ((sch = chsc_get_next_subchannel(sch))) { |
243 | spin_lock(sch->lock); | |
244 | private = sch->private; | |
245 | if (private->request) { | |
246 | spin_unlock(sch->lock); | |
247 | ret = -EBUSY; | |
248 | continue; | |
249 | } | |
250 | chsc_area->header.sid = sch->schid; | |
251 | CHSC_LOG(2, "schid"); | |
252 | CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid)); | |
253 | cc = chsc(chsc_area); | |
254 | sprintf(dbf, "cc:%d", cc); | |
255 | CHSC_LOG(2, dbf); | |
256 | switch (cc) { | |
257 | case 0: | |
258 | ret = 0; | |
259 | break; | |
260 | case 1: | |
261 | sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC; | |
262 | ret = -EINPROGRESS; | |
263 | private->request = request; | |
264 | break; | |
265 | case 2: | |
266 | ret = -EBUSY; | |
267 | break; | |
268 | default: | |
269 | ret = -ENODEV; | |
270 | } | |
271 | spin_unlock(sch->lock); | |
272 | CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n", | |
273 | sch->schid.ssid, sch->schid.sch_no, cc); | |
274 | if (ret == -EINPROGRESS) | |
275 | return -EINPROGRESS; | |
276 | put_device(&sch->dev); | |
277 | if (ret == 0) | |
278 | return 0; | |
279 | } | |
280 | return ret; | |
281 | } | |
282 | ||
283 | static void chsc_log_command(struct chsc_async_area *chsc_area) | |
284 | { | |
285 | char dbf[10]; | |
286 | ||
287 | sprintf(dbf, "CHSC:%x", chsc_area->header.code); | |
288 | CHSC_LOG(0, dbf); | |
289 | CHSC_LOG_HEX(0, chsc_area, 32); | |
290 | } | |
291 | ||
292 | static int chsc_examine_irb(struct chsc_request *request) | |
293 | { | |
294 | int backed_up; | |
295 | ||
b2bbb642 | 296 | if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND)) |
9d92a7e1 CH |
297 | return -EIO; |
298 | backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK; | |
299 | request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK; | |
300 | if (scsw_cstat(&request->irb.scsw) == 0) | |
301 | return 0; | |
302 | if (!backed_up) | |
303 | return 0; | |
304 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK) | |
305 | return -EIO; | |
306 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK) | |
307 | return -EPERM; | |
308 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK) | |
309 | return -EAGAIN; | |
310 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK) | |
311 | return -EAGAIN; | |
312 | return -EIO; | |
313 | } | |
314 | ||
315 | static int chsc_ioctl_start(void __user *user_area) | |
316 | { | |
317 | struct chsc_request *request; | |
318 | struct chsc_async_area *chsc_area; | |
319 | int ret; | |
320 | char dbf[10]; | |
321 | ||
322 | if (!css_general_characteristics.dynio) | |
323 | /* It makes no sense to try. */ | |
324 | return -EOPNOTSUPP; | |
325 | chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); | |
326 | if (!chsc_area) | |
327 | return -ENOMEM; | |
328 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
329 | if (!request) { | |
330 | ret = -ENOMEM; | |
331 | goto out_free; | |
332 | } | |
333 | init_completion(&request->completion); | |
334 | if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { | |
335 | ret = -EFAULT; | |
336 | goto out_free; | |
337 | } | |
338 | chsc_log_command(chsc_area); | |
339 | spin_lock_irq(&chsc_lock); | |
340 | ret = chsc_async(chsc_area, request); | |
341 | spin_unlock_irq(&chsc_lock); | |
342 | if (ret == -EINPROGRESS) { | |
343 | wait_for_completion(&request->completion); | |
344 | ret = chsc_examine_irb(request); | |
345 | } | |
346 | /* copy area back to user */ | |
347 | if (!ret) | |
348 | if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) | |
349 | ret = -EFAULT; | |
350 | out_free: | |
351 | sprintf(dbf, "ret:%d", ret); | |
352 | CHSC_LOG(0, dbf); | |
353 | kfree(request); | |
354 | free_page((unsigned long)chsc_area); | |
355 | return ret; | |
356 | } | |
357 | ||
358 | static int chsc_ioctl_info_channel_path(void __user *user_cd) | |
359 | { | |
360 | struct chsc_chp_cd *cd; | |
361 | int ret, ccode; | |
362 | struct { | |
363 | struct chsc_header request; | |
364 | u32 : 2; | |
365 | u32 m : 1; | |
366 | u32 : 1; | |
367 | u32 fmt1 : 4; | |
368 | u32 cssid : 8; | |
369 | u32 : 8; | |
370 | u32 first_chpid : 8; | |
371 | u32 : 24; | |
372 | u32 last_chpid : 8; | |
373 | u32 : 32; | |
374 | struct chsc_header response; | |
375 | u8 data[PAGE_SIZE - 20]; | |
376 | } __attribute__ ((packed)) *scpcd_area; | |
377 | ||
378 | scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
379 | if (!scpcd_area) | |
380 | return -ENOMEM; | |
381 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
382 | if (!cd) { | |
383 | ret = -ENOMEM; | |
384 | goto out_free; | |
385 | } | |
386 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
387 | ret = -EFAULT; | |
388 | goto out_free; | |
389 | } | |
390 | scpcd_area->request.length = 0x0010; | |
391 | scpcd_area->request.code = 0x0028; | |
392 | scpcd_area->m = cd->m; | |
393 | scpcd_area->fmt1 = cd->fmt; | |
394 | scpcd_area->cssid = cd->chpid.cssid; | |
395 | scpcd_area->first_chpid = cd->chpid.id; | |
396 | scpcd_area->last_chpid = cd->chpid.id; | |
397 | ||
398 | ccode = chsc(scpcd_area); | |
399 | if (ccode != 0) { | |
400 | ret = -EIO; | |
401 | goto out_free; | |
402 | } | |
403 | if (scpcd_area->response.code != 0x0001) { | |
404 | ret = -EIO; | |
405 | CHSC_MSG(0, "scpcd: response code=%x\n", | |
406 | scpcd_area->response.code); | |
407 | goto out_free; | |
408 | } | |
409 | memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length); | |
410 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
411 | ret = -EFAULT; | |
412 | else | |
413 | ret = 0; | |
414 | out_free: | |
415 | kfree(cd); | |
416 | free_page((unsigned long)scpcd_area); | |
417 | return ret; | |
418 | } | |
419 | ||
420 | static int chsc_ioctl_info_cu(void __user *user_cd) | |
421 | { | |
422 | struct chsc_cu_cd *cd; | |
423 | int ret, ccode; | |
424 | struct { | |
425 | struct chsc_header request; | |
426 | u32 : 2; | |
427 | u32 m : 1; | |
428 | u32 : 1; | |
429 | u32 fmt1 : 4; | |
430 | u32 cssid : 8; | |
431 | u32 : 8; | |
432 | u32 first_cun : 8; | |
433 | u32 : 24; | |
434 | u32 last_cun : 8; | |
435 | u32 : 32; | |
436 | struct chsc_header response; | |
437 | u8 data[PAGE_SIZE - 20]; | |
438 | } __attribute__ ((packed)) *scucd_area; | |
439 | ||
440 | scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
441 | if (!scucd_area) | |
442 | return -ENOMEM; | |
443 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
444 | if (!cd) { | |
445 | ret = -ENOMEM; | |
446 | goto out_free; | |
447 | } | |
448 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
449 | ret = -EFAULT; | |
450 | goto out_free; | |
451 | } | |
452 | scucd_area->request.length = 0x0010; | |
453 | scucd_area->request.code = 0x0028; | |
454 | scucd_area->m = cd->m; | |
455 | scucd_area->fmt1 = cd->fmt; | |
456 | scucd_area->cssid = cd->cssid; | |
457 | scucd_area->first_cun = cd->cun; | |
458 | scucd_area->last_cun = cd->cun; | |
459 | ||
460 | ccode = chsc(scucd_area); | |
461 | if (ccode != 0) { | |
462 | ret = -EIO; | |
463 | goto out_free; | |
464 | } | |
465 | if (scucd_area->response.code != 0x0001) { | |
466 | ret = -EIO; | |
467 | CHSC_MSG(0, "scucd: response code=%x\n", | |
468 | scucd_area->response.code); | |
469 | goto out_free; | |
470 | } | |
471 | memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length); | |
472 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
473 | ret = -EFAULT; | |
474 | else | |
475 | ret = 0; | |
476 | out_free: | |
477 | kfree(cd); | |
478 | free_page((unsigned long)scucd_area); | |
479 | return ret; | |
480 | } | |
481 | ||
482 | static int chsc_ioctl_info_sch_cu(void __user *user_cud) | |
483 | { | |
484 | struct chsc_sch_cud *cud; | |
485 | int ret, ccode; | |
486 | struct { | |
487 | struct chsc_header request; | |
488 | u32 : 2; | |
489 | u32 m : 1; | |
490 | u32 : 5; | |
491 | u32 fmt1 : 4; | |
492 | u32 : 2; | |
493 | u32 ssid : 2; | |
494 | u32 first_sch : 16; | |
495 | u32 : 8; | |
496 | u32 cssid : 8; | |
497 | u32 last_sch : 16; | |
498 | u32 : 32; | |
499 | struct chsc_header response; | |
500 | u8 data[PAGE_SIZE - 20]; | |
501 | } __attribute__ ((packed)) *sscud_area; | |
502 | ||
503 | sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
504 | if (!sscud_area) | |
505 | return -ENOMEM; | |
506 | cud = kzalloc(sizeof(*cud), GFP_KERNEL); | |
507 | if (!cud) { | |
508 | ret = -ENOMEM; | |
509 | goto out_free; | |
510 | } | |
511 | if (copy_from_user(cud, user_cud, sizeof(*cud))) { | |
512 | ret = -EFAULT; | |
513 | goto out_free; | |
514 | } | |
515 | sscud_area->request.length = 0x0010; | |
516 | sscud_area->request.code = 0x0006; | |
517 | sscud_area->m = cud->schid.m; | |
518 | sscud_area->fmt1 = cud->fmt; | |
519 | sscud_area->ssid = cud->schid.ssid; | |
520 | sscud_area->first_sch = cud->schid.sch_no; | |
521 | sscud_area->cssid = cud->schid.cssid; | |
522 | sscud_area->last_sch = cud->schid.sch_no; | |
523 | ||
524 | ccode = chsc(sscud_area); | |
525 | if (ccode != 0) { | |
526 | ret = -EIO; | |
527 | goto out_free; | |
528 | } | |
529 | if (sscud_area->response.code != 0x0001) { | |
530 | ret = -EIO; | |
531 | CHSC_MSG(0, "sscud: response code=%x\n", | |
532 | sscud_area->response.code); | |
533 | goto out_free; | |
534 | } | |
535 | memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length); | |
536 | if (copy_to_user(user_cud, cud, sizeof(*cud))) | |
537 | ret = -EFAULT; | |
538 | else | |
539 | ret = 0; | |
540 | out_free: | |
541 | kfree(cud); | |
542 | free_page((unsigned long)sscud_area); | |
543 | return ret; | |
544 | } | |
545 | ||
546 | static int chsc_ioctl_conf_info(void __user *user_ci) | |
547 | { | |
548 | struct chsc_conf_info *ci; | |
549 | int ret, ccode; | |
550 | struct { | |
551 | struct chsc_header request; | |
552 | u32 : 2; | |
553 | u32 m : 1; | |
554 | u32 : 1; | |
555 | u32 fmt1 : 4; | |
556 | u32 cssid : 8; | |
557 | u32 : 6; | |
558 | u32 ssid : 2; | |
559 | u32 : 8; | |
560 | u64 : 64; | |
561 | struct chsc_header response; | |
562 | u8 data[PAGE_SIZE - 20]; | |
563 | } __attribute__ ((packed)) *sci_area; | |
564 | ||
565 | sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
566 | if (!sci_area) | |
567 | return -ENOMEM; | |
568 | ci = kzalloc(sizeof(*ci), GFP_KERNEL); | |
569 | if (!ci) { | |
570 | ret = -ENOMEM; | |
571 | goto out_free; | |
572 | } | |
573 | if (copy_from_user(ci, user_ci, sizeof(*ci))) { | |
574 | ret = -EFAULT; | |
575 | goto out_free; | |
576 | } | |
577 | sci_area->request.length = 0x0010; | |
578 | sci_area->request.code = 0x0012; | |
579 | sci_area->m = ci->id.m; | |
580 | sci_area->fmt1 = ci->fmt; | |
581 | sci_area->cssid = ci->id.cssid; | |
582 | sci_area->ssid = ci->id.ssid; | |
583 | ||
584 | ccode = chsc(sci_area); | |
585 | if (ccode != 0) { | |
586 | ret = -EIO; | |
587 | goto out_free; | |
588 | } | |
589 | if (sci_area->response.code != 0x0001) { | |
590 | ret = -EIO; | |
591 | CHSC_MSG(0, "sci: response code=%x\n", | |
592 | sci_area->response.code); | |
593 | goto out_free; | |
594 | } | |
595 | memcpy(&ci->scid, &sci_area->response, sci_area->response.length); | |
596 | if (copy_to_user(user_ci, ci, sizeof(*ci))) | |
597 | ret = -EFAULT; | |
598 | else | |
599 | ret = 0; | |
600 | out_free: | |
601 | kfree(ci); | |
602 | free_page((unsigned long)sci_area); | |
603 | return ret; | |
604 | } | |
605 | ||
606 | static int chsc_ioctl_conf_comp_list(void __user *user_ccl) | |
607 | { | |
608 | struct chsc_comp_list *ccl; | |
609 | int ret, ccode; | |
610 | struct { | |
611 | struct chsc_header request; | |
612 | u32 ctype : 8; | |
613 | u32 : 4; | |
614 | u32 fmt : 4; | |
615 | u32 : 16; | |
616 | u64 : 64; | |
617 | u32 list_parm[2]; | |
618 | u64 : 64; | |
619 | struct chsc_header response; | |
620 | u8 data[PAGE_SIZE - 36]; | |
621 | } __attribute__ ((packed)) *sccl_area; | |
622 | struct { | |
623 | u32 m : 1; | |
624 | u32 : 31; | |
625 | u32 cssid : 8; | |
626 | u32 : 16; | |
627 | u32 chpid : 8; | |
628 | } __attribute__ ((packed)) *chpid_parm; | |
629 | struct { | |
630 | u32 f_cssid : 8; | |
631 | u32 l_cssid : 8; | |
632 | u32 : 16; | |
633 | u32 res; | |
634 | } __attribute__ ((packed)) *cssids_parm; | |
635 | ||
636 | sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
637 | if (!sccl_area) | |
638 | return -ENOMEM; | |
639 | ccl = kzalloc(sizeof(*ccl), GFP_KERNEL); | |
640 | if (!ccl) { | |
641 | ret = -ENOMEM; | |
642 | goto out_free; | |
643 | } | |
644 | if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) { | |
645 | ret = -EFAULT; | |
646 | goto out_free; | |
647 | } | |
648 | sccl_area->request.length = 0x0020; | |
649 | sccl_area->request.code = 0x0030; | |
650 | sccl_area->fmt = ccl->req.fmt; | |
651 | sccl_area->ctype = ccl->req.ctype; | |
652 | switch (sccl_area->ctype) { | |
653 | case CCL_CU_ON_CHP: | |
654 | case CCL_IOP_CHP: | |
655 | chpid_parm = (void *)&sccl_area->list_parm; | |
656 | chpid_parm->m = ccl->req.chpid.m; | |
657 | chpid_parm->cssid = ccl->req.chpid.chp.cssid; | |
658 | chpid_parm->chpid = ccl->req.chpid.chp.id; | |
659 | break; | |
660 | case CCL_CSS_IMG: | |
661 | case CCL_CSS_IMG_CONF_CHAR: | |
662 | cssids_parm = (void *)&sccl_area->list_parm; | |
663 | cssids_parm->f_cssid = ccl->req.cssids.f_cssid; | |
664 | cssids_parm->l_cssid = ccl->req.cssids.l_cssid; | |
665 | break; | |
666 | } | |
667 | ccode = chsc(sccl_area); | |
668 | if (ccode != 0) { | |
669 | ret = -EIO; | |
670 | goto out_free; | |
671 | } | |
672 | if (sccl_area->response.code != 0x0001) { | |
673 | ret = -EIO; | |
674 | CHSC_MSG(0, "sccl: response code=%x\n", | |
675 | sccl_area->response.code); | |
676 | goto out_free; | |
677 | } | |
678 | memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length); | |
679 | if (copy_to_user(user_ccl, ccl, sizeof(*ccl))) | |
680 | ret = -EFAULT; | |
681 | else | |
682 | ret = 0; | |
683 | out_free: | |
684 | kfree(ccl); | |
685 | free_page((unsigned long)sccl_area); | |
686 | return ret; | |
687 | } | |
688 | ||
689 | static int chsc_ioctl_chpd(void __user *user_chpd) | |
690 | { | |
691 | struct chsc_cpd_info *chpd; | |
692 | int ret; | |
693 | ||
694 | chpd = kzalloc(sizeof(*chpd), GFP_KERNEL); | |
695 | if (!chpd) | |
696 | return -ENOMEM; | |
697 | if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) { | |
698 | ret = -EFAULT; | |
699 | goto out_free; | |
700 | } | |
701 | ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt, | |
702 | chpd->rfmt, chpd->c, chpd->m, | |
703 | &chpd->chpdb); | |
704 | if (ret) | |
705 | goto out_free; | |
706 | if (copy_to_user(user_chpd, chpd, sizeof(*chpd))) | |
707 | ret = -EFAULT; | |
708 | out_free: | |
709 | kfree(chpd); | |
710 | return ret; | |
711 | } | |
712 | ||
713 | static int chsc_ioctl_dcal(void __user *user_dcal) | |
714 | { | |
715 | struct chsc_dcal *dcal; | |
716 | int ret, ccode; | |
717 | struct { | |
718 | struct chsc_header request; | |
719 | u32 atype : 8; | |
720 | u32 : 4; | |
721 | u32 fmt : 4; | |
722 | u32 : 16; | |
723 | u32 res0[2]; | |
724 | u32 list_parm[2]; | |
725 | u32 res1[2]; | |
726 | struct chsc_header response; | |
727 | u8 data[PAGE_SIZE - 36]; | |
728 | } __attribute__ ((packed)) *sdcal_area; | |
729 | ||
730 | sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
731 | if (!sdcal_area) | |
732 | return -ENOMEM; | |
733 | dcal = kzalloc(sizeof(*dcal), GFP_KERNEL); | |
734 | if (!dcal) { | |
735 | ret = -ENOMEM; | |
736 | goto out_free; | |
737 | } | |
738 | if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) { | |
739 | ret = -EFAULT; | |
740 | goto out_free; | |
741 | } | |
742 | sdcal_area->request.length = 0x0020; | |
743 | sdcal_area->request.code = 0x0034; | |
744 | sdcal_area->atype = dcal->req.atype; | |
745 | sdcal_area->fmt = dcal->req.fmt; | |
746 | memcpy(&sdcal_area->list_parm, &dcal->req.list_parm, | |
747 | sizeof(sdcal_area->list_parm)); | |
748 | ||
749 | ccode = chsc(sdcal_area); | |
750 | if (ccode != 0) { | |
751 | ret = -EIO; | |
752 | goto out_free; | |
753 | } | |
754 | if (sdcal_area->response.code != 0x0001) { | |
755 | ret = -EIO; | |
756 | CHSC_MSG(0, "sdcal: response code=%x\n", | |
757 | sdcal_area->response.code); | |
758 | goto out_free; | |
759 | } | |
760 | memcpy(&dcal->sdcal, &sdcal_area->response, | |
761 | sdcal_area->response.length); | |
762 | if (copy_to_user(user_dcal, dcal, sizeof(*dcal))) | |
763 | ret = -EFAULT; | |
764 | else | |
765 | ret = 0; | |
766 | out_free: | |
767 | kfree(dcal); | |
768 | free_page((unsigned long)sdcal_area); | |
769 | return ret; | |
770 | } | |
771 | ||
772 | static long chsc_ioctl(struct file *filp, unsigned int cmd, | |
773 | unsigned long arg) | |
774 | { | |
44ee6a85 HC |
775 | void __user *argp; |
776 | ||
9d92a7e1 | 777 | CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd); |
44ee6a85 HC |
778 | if (is_compat_task()) |
779 | argp = compat_ptr(arg); | |
780 | else | |
781 | argp = (void __user *)arg; | |
9d92a7e1 CH |
782 | switch (cmd) { |
783 | case CHSC_START: | |
44ee6a85 | 784 | return chsc_ioctl_start(argp); |
9d92a7e1 | 785 | case CHSC_INFO_CHANNEL_PATH: |
44ee6a85 | 786 | return chsc_ioctl_info_channel_path(argp); |
9d92a7e1 | 787 | case CHSC_INFO_CU: |
44ee6a85 | 788 | return chsc_ioctl_info_cu(argp); |
9d92a7e1 | 789 | case CHSC_INFO_SCH_CU: |
44ee6a85 | 790 | return chsc_ioctl_info_sch_cu(argp); |
9d92a7e1 | 791 | case CHSC_INFO_CI: |
44ee6a85 | 792 | return chsc_ioctl_conf_info(argp); |
9d92a7e1 | 793 | case CHSC_INFO_CCL: |
44ee6a85 | 794 | return chsc_ioctl_conf_comp_list(argp); |
9d92a7e1 | 795 | case CHSC_INFO_CPD: |
44ee6a85 | 796 | return chsc_ioctl_chpd(argp); |
9d92a7e1 | 797 | case CHSC_INFO_DCAL: |
44ee6a85 | 798 | return chsc_ioctl_dcal(argp); |
9d92a7e1 CH |
799 | default: /* unknown ioctl number */ |
800 | return -ENOIOCTLCMD; | |
801 | } | |
802 | } | |
803 | ||
804 | static const struct file_operations chsc_fops = { | |
805 | .owner = THIS_MODULE, | |
806 | .unlocked_ioctl = chsc_ioctl, | |
807 | .compat_ioctl = chsc_ioctl, | |
808 | }; | |
809 | ||
810 | static struct miscdevice chsc_misc_device = { | |
811 | .minor = MISC_DYNAMIC_MINOR, | |
812 | .name = "chsc", | |
813 | .fops = &chsc_fops, | |
814 | }; | |
815 | ||
816 | static int __init chsc_misc_init(void) | |
817 | { | |
818 | return misc_register(&chsc_misc_device); | |
819 | } | |
820 | ||
821 | static void chsc_misc_cleanup(void) | |
822 | { | |
823 | misc_deregister(&chsc_misc_device); | |
824 | } | |
825 | ||
826 | static int __init chsc_sch_init(void) | |
827 | { | |
828 | int ret; | |
829 | ||
830 | ret = chsc_init_dbfs(); | |
831 | if (ret) | |
832 | return ret; | |
833 | isc_register(CHSC_SCH_ISC); | |
834 | ret = chsc_init_sch_driver(); | |
835 | if (ret) | |
836 | goto out_dbf; | |
837 | ret = chsc_misc_init(); | |
838 | if (ret) | |
839 | goto out_driver; | |
840 | return ret; | |
841 | out_driver: | |
842 | chsc_cleanup_sch_driver(); | |
843 | out_dbf: | |
844 | isc_unregister(CHSC_SCH_ISC); | |
845 | chsc_remove_dbfs(); | |
846 | return ret; | |
847 | } | |
848 | ||
849 | static void __exit chsc_sch_exit(void) | |
850 | { | |
851 | chsc_misc_cleanup(); | |
852 | chsc_cleanup_sch_driver(); | |
853 | isc_unregister(CHSC_SCH_ISC); | |
854 | chsc_remove_dbfs(); | |
855 | } | |
856 | ||
857 | module_init(chsc_sch_init); | |
858 | module_exit(chsc_sch_exit); |