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Commit | Line | Data |
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9d92a7e1 CH |
1 | /* |
2 | * Driver for s390 chsc subchannels | |
3 | * | |
65b4e403 | 4 | * Copyright IBM Corp. 2008, 2011 |
ad285ae9 | 5 | * |
9d92a7e1 CH |
6 | * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> |
7 | * | |
8 | */ | |
9 | ||
5a0e3ad6 | 10 | #include <linux/slab.h> |
048cd4e5 | 11 | #include <linux/compat.h> |
9d92a7e1 CH |
12 | #include <linux/device.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/uaccess.h> | |
15 | #include <linux/miscdevice.h> | |
65b4e403 | 16 | #include <linux/kernel_stat.h> |
9d92a7e1 | 17 | |
44ee6a85 | 18 | #include <asm/compat.h> |
9d92a7e1 CH |
19 | #include <asm/cio.h> |
20 | #include <asm/chsc.h> | |
21 | #include <asm/isc.h> | |
22 | ||
23 | #include "cio.h" | |
24 | #include "cio_debug.h" | |
25 | #include "css.h" | |
26 | #include "chsc_sch.h" | |
27 | #include "ioasm.h" | |
28 | ||
29 | static debug_info_t *chsc_debug_msg_id; | |
30 | static debug_info_t *chsc_debug_log_id; | |
31 | ||
32 | #define CHSC_MSG(imp, args...) do { \ | |
33 | debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \ | |
34 | } while (0) | |
35 | ||
36 | #define CHSC_LOG(imp, txt) do { \ | |
37 | debug_text_event(chsc_debug_log_id, imp , txt); \ | |
38 | } while (0) | |
39 | ||
40 | static void CHSC_LOG_HEX(int level, void *data, int length) | |
41 | { | |
42 | while (length > 0) { | |
43 | debug_event(chsc_debug_log_id, level, data, length); | |
44 | length -= chsc_debug_log_id->buf_size; | |
45 | data += chsc_debug_log_id->buf_size; | |
46 | } | |
47 | } | |
48 | ||
49 | MODULE_AUTHOR("IBM Corporation"); | |
50 | MODULE_DESCRIPTION("driver for s390 chsc subchannels"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | static void chsc_subchannel_irq(struct subchannel *sch) | |
54 | { | |
85fb534e | 55 | struct chsc_private *private = dev_get_drvdata(&sch->dev); |
9d92a7e1 | 56 | struct chsc_request *request = private->request; |
cbb870c8 | 57 | struct irb *irb = (struct irb *)&S390_lowcore.irb; |
9d92a7e1 CH |
58 | |
59 | CHSC_LOG(4, "irb"); | |
60 | CHSC_LOG_HEX(4, irb, sizeof(*irb)); | |
65b4e403 SO |
61 | kstat_cpu(smp_processor_id()).irqs[IOINT_CSC]++; |
62 | ||
9d92a7e1 CH |
63 | /* Copy irb to provided request and set done. */ |
64 | if (!request) { | |
65 | CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n", | |
66 | sch->schid.ssid, sch->schid.sch_no); | |
67 | return; | |
68 | } | |
69 | private->request = NULL; | |
70 | memcpy(&request->irb, irb, sizeof(*irb)); | |
cdb912a4 | 71 | cio_update_schib(sch); |
9d92a7e1 CH |
72 | complete(&request->completion); |
73 | put_device(&sch->dev); | |
74 | } | |
75 | ||
76 | static int chsc_subchannel_probe(struct subchannel *sch) | |
77 | { | |
78 | struct chsc_private *private; | |
79 | int ret; | |
80 | ||
81 | CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n", | |
82 | sch->schid.ssid, sch->schid.sch_no); | |
83 | sch->isc = CHSC_SCH_ISC; | |
84 | private = kzalloc(sizeof(*private), GFP_KERNEL); | |
85 | if (!private) | |
86 | return -ENOMEM; | |
85fb534e | 87 | dev_set_drvdata(&sch->dev, private); |
9d92a7e1 CH |
88 | ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch); |
89 | if (ret) { | |
90 | CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n", | |
91 | sch->schid.ssid, sch->schid.sch_no, ret); | |
85fb534e | 92 | dev_set_drvdata(&sch->dev, NULL); |
9d92a7e1 CH |
93 | kfree(private); |
94 | } else { | |
f67f129e ML |
95 | if (dev_get_uevent_suppress(&sch->dev)) { |
96 | dev_set_uevent_suppress(&sch->dev, 0); | |
9d92a7e1 CH |
97 | kobject_uevent(&sch->dev.kobj, KOBJ_ADD); |
98 | } | |
99 | } | |
100 | return ret; | |
101 | } | |
102 | ||
103 | static int chsc_subchannel_remove(struct subchannel *sch) | |
104 | { | |
105 | struct chsc_private *private; | |
106 | ||
107 | cio_disable_subchannel(sch); | |
85fb534e SO |
108 | private = dev_get_drvdata(&sch->dev); |
109 | dev_set_drvdata(&sch->dev, NULL); | |
9d92a7e1 CH |
110 | if (private->request) { |
111 | complete(&private->request->completion); | |
112 | put_device(&sch->dev); | |
113 | } | |
114 | kfree(private); | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static void chsc_subchannel_shutdown(struct subchannel *sch) | |
119 | { | |
120 | cio_disable_subchannel(sch); | |
121 | } | |
122 | ||
ad285ae9 CH |
123 | static int chsc_subchannel_prepare(struct subchannel *sch) |
124 | { | |
125 | int cc; | |
126 | struct schib schib; | |
127 | /* | |
128 | * Don't allow suspend while the subchannel is not idle | |
129 | * since we don't have a way to clear the subchannel and | |
130 | * cannot disable it with a request running. | |
131 | */ | |
8821d24c | 132 | cc = stsch_err(sch->schid, &schib); |
ad285ae9 CH |
133 | if (!cc && scsw_stctl(&schib.scsw)) |
134 | return -EAGAIN; | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static int chsc_subchannel_freeze(struct subchannel *sch) | |
139 | { | |
140 | return cio_disable_subchannel(sch); | |
141 | } | |
142 | ||
143 | static int chsc_subchannel_restore(struct subchannel *sch) | |
144 | { | |
145 | return cio_enable_subchannel(sch, (u32)(unsigned long)sch); | |
146 | } | |
147 | ||
9d92a7e1 CH |
148 | static struct css_device_id chsc_subchannel_ids[] = { |
149 | { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, }, | |
150 | { /* end of list */ }, | |
151 | }; | |
152 | MODULE_DEVICE_TABLE(css, chsc_subchannel_ids); | |
153 | ||
154 | static struct css_driver chsc_subchannel_driver = { | |
e6aed122 SO |
155 | .drv = { |
156 | .owner = THIS_MODULE, | |
157 | .name = "chsc_subchannel", | |
158 | }, | |
9d92a7e1 CH |
159 | .subchannel_type = chsc_subchannel_ids, |
160 | .irq = chsc_subchannel_irq, | |
161 | .probe = chsc_subchannel_probe, | |
162 | .remove = chsc_subchannel_remove, | |
163 | .shutdown = chsc_subchannel_shutdown, | |
ad285ae9 CH |
164 | .prepare = chsc_subchannel_prepare, |
165 | .freeze = chsc_subchannel_freeze, | |
166 | .thaw = chsc_subchannel_restore, | |
167 | .restore = chsc_subchannel_restore, | |
9d92a7e1 CH |
168 | }; |
169 | ||
170 | static int __init chsc_init_dbfs(void) | |
171 | { | |
172 | chsc_debug_msg_id = debug_register("chsc_msg", 16, 1, | |
173 | 16 * sizeof(long)); | |
174 | if (!chsc_debug_msg_id) | |
175 | goto out; | |
176 | debug_register_view(chsc_debug_msg_id, &debug_sprintf_view); | |
177 | debug_set_level(chsc_debug_msg_id, 2); | |
178 | chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16); | |
179 | if (!chsc_debug_log_id) | |
180 | goto out; | |
181 | debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view); | |
182 | debug_set_level(chsc_debug_log_id, 2); | |
183 | return 0; | |
184 | out: | |
185 | if (chsc_debug_msg_id) | |
186 | debug_unregister(chsc_debug_msg_id); | |
187 | return -ENOMEM; | |
188 | } | |
189 | ||
190 | static void chsc_remove_dbfs(void) | |
191 | { | |
192 | debug_unregister(chsc_debug_log_id); | |
193 | debug_unregister(chsc_debug_msg_id); | |
194 | } | |
195 | ||
196 | static int __init chsc_init_sch_driver(void) | |
197 | { | |
198 | return css_driver_register(&chsc_subchannel_driver); | |
199 | } | |
200 | ||
201 | static void chsc_cleanup_sch_driver(void) | |
202 | { | |
203 | css_driver_unregister(&chsc_subchannel_driver); | |
204 | } | |
205 | ||
206 | static DEFINE_SPINLOCK(chsc_lock); | |
207 | ||
208 | static int chsc_subchannel_match_next_free(struct device *dev, void *data) | |
209 | { | |
210 | struct subchannel *sch = to_subchannel(dev); | |
211 | ||
212 | return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw); | |
213 | } | |
214 | ||
215 | static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch) | |
216 | { | |
217 | struct device *dev; | |
218 | ||
219 | dev = driver_find_device(&chsc_subchannel_driver.drv, | |
220 | sch ? &sch->dev : NULL, NULL, | |
221 | chsc_subchannel_match_next_free); | |
222 | return dev ? to_subchannel(dev) : NULL; | |
223 | } | |
224 | ||
225 | /** | |
226 | * chsc_async() - try to start a chsc request asynchronously | |
227 | * @chsc_area: request to be started | |
228 | * @request: request structure to associate | |
229 | * | |
230 | * Tries to start a chsc request on one of the existing chsc subchannels. | |
231 | * Returns: | |
232 | * %0 if the request was performed synchronously | |
233 | * %-EINPROGRESS if the request was successfully started | |
234 | * %-EBUSY if all chsc subchannels are busy | |
235 | * %-ENODEV if no chsc subchannels are available | |
236 | * Context: | |
237 | * interrupts disabled, chsc_lock held | |
238 | */ | |
239 | static int chsc_async(struct chsc_async_area *chsc_area, | |
240 | struct chsc_request *request) | |
241 | { | |
242 | int cc; | |
243 | struct chsc_private *private; | |
244 | struct subchannel *sch = NULL; | |
245 | int ret = -ENODEV; | |
246 | char dbf[10]; | |
247 | ||
d1bf8590 | 248 | chsc_area->header.key = PAGE_DEFAULT_KEY >> 4; |
9d92a7e1 CH |
249 | while ((sch = chsc_get_next_subchannel(sch))) { |
250 | spin_lock(sch->lock); | |
85fb534e | 251 | private = dev_get_drvdata(&sch->dev); |
9d92a7e1 CH |
252 | if (private->request) { |
253 | spin_unlock(sch->lock); | |
254 | ret = -EBUSY; | |
255 | continue; | |
256 | } | |
257 | chsc_area->header.sid = sch->schid; | |
258 | CHSC_LOG(2, "schid"); | |
259 | CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid)); | |
260 | cc = chsc(chsc_area); | |
261 | sprintf(dbf, "cc:%d", cc); | |
262 | CHSC_LOG(2, dbf); | |
263 | switch (cc) { | |
264 | case 0: | |
265 | ret = 0; | |
266 | break; | |
267 | case 1: | |
268 | sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC; | |
269 | ret = -EINPROGRESS; | |
270 | private->request = request; | |
271 | break; | |
272 | case 2: | |
273 | ret = -EBUSY; | |
274 | break; | |
275 | default: | |
276 | ret = -ENODEV; | |
277 | } | |
278 | spin_unlock(sch->lock); | |
279 | CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n", | |
280 | sch->schid.ssid, sch->schid.sch_no, cc); | |
281 | if (ret == -EINPROGRESS) | |
282 | return -EINPROGRESS; | |
283 | put_device(&sch->dev); | |
284 | if (ret == 0) | |
285 | return 0; | |
286 | } | |
287 | return ret; | |
288 | } | |
289 | ||
290 | static void chsc_log_command(struct chsc_async_area *chsc_area) | |
291 | { | |
292 | char dbf[10]; | |
293 | ||
294 | sprintf(dbf, "CHSC:%x", chsc_area->header.code); | |
295 | CHSC_LOG(0, dbf); | |
296 | CHSC_LOG_HEX(0, chsc_area, 32); | |
297 | } | |
298 | ||
299 | static int chsc_examine_irb(struct chsc_request *request) | |
300 | { | |
301 | int backed_up; | |
302 | ||
b2bbb642 | 303 | if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND)) |
9d92a7e1 CH |
304 | return -EIO; |
305 | backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK; | |
306 | request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK; | |
307 | if (scsw_cstat(&request->irb.scsw) == 0) | |
308 | return 0; | |
309 | if (!backed_up) | |
310 | return 0; | |
311 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK) | |
312 | return -EIO; | |
313 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK) | |
314 | return -EPERM; | |
315 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK) | |
316 | return -EAGAIN; | |
317 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK) | |
318 | return -EAGAIN; | |
319 | return -EIO; | |
320 | } | |
321 | ||
322 | static int chsc_ioctl_start(void __user *user_area) | |
323 | { | |
324 | struct chsc_request *request; | |
325 | struct chsc_async_area *chsc_area; | |
326 | int ret; | |
327 | char dbf[10]; | |
328 | ||
329 | if (!css_general_characteristics.dynio) | |
330 | /* It makes no sense to try. */ | |
331 | return -EOPNOTSUPP; | |
332 | chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); | |
333 | if (!chsc_area) | |
334 | return -ENOMEM; | |
335 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
336 | if (!request) { | |
337 | ret = -ENOMEM; | |
338 | goto out_free; | |
339 | } | |
340 | init_completion(&request->completion); | |
341 | if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { | |
342 | ret = -EFAULT; | |
343 | goto out_free; | |
344 | } | |
345 | chsc_log_command(chsc_area); | |
346 | spin_lock_irq(&chsc_lock); | |
347 | ret = chsc_async(chsc_area, request); | |
348 | spin_unlock_irq(&chsc_lock); | |
349 | if (ret == -EINPROGRESS) { | |
350 | wait_for_completion(&request->completion); | |
351 | ret = chsc_examine_irb(request); | |
352 | } | |
353 | /* copy area back to user */ | |
354 | if (!ret) | |
355 | if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) | |
356 | ret = -EFAULT; | |
357 | out_free: | |
358 | sprintf(dbf, "ret:%d", ret); | |
359 | CHSC_LOG(0, dbf); | |
360 | kfree(request); | |
361 | free_page((unsigned long)chsc_area); | |
362 | return ret; | |
363 | } | |
364 | ||
365 | static int chsc_ioctl_info_channel_path(void __user *user_cd) | |
366 | { | |
367 | struct chsc_chp_cd *cd; | |
368 | int ret, ccode; | |
369 | struct { | |
370 | struct chsc_header request; | |
371 | u32 : 2; | |
372 | u32 m : 1; | |
373 | u32 : 1; | |
374 | u32 fmt1 : 4; | |
375 | u32 cssid : 8; | |
376 | u32 : 8; | |
377 | u32 first_chpid : 8; | |
378 | u32 : 24; | |
379 | u32 last_chpid : 8; | |
380 | u32 : 32; | |
381 | struct chsc_header response; | |
382 | u8 data[PAGE_SIZE - 20]; | |
383 | } __attribute__ ((packed)) *scpcd_area; | |
384 | ||
385 | scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
386 | if (!scpcd_area) | |
387 | return -ENOMEM; | |
388 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
389 | if (!cd) { | |
390 | ret = -ENOMEM; | |
391 | goto out_free; | |
392 | } | |
393 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
394 | ret = -EFAULT; | |
395 | goto out_free; | |
396 | } | |
397 | scpcd_area->request.length = 0x0010; | |
398 | scpcd_area->request.code = 0x0028; | |
399 | scpcd_area->m = cd->m; | |
400 | scpcd_area->fmt1 = cd->fmt; | |
401 | scpcd_area->cssid = cd->chpid.cssid; | |
402 | scpcd_area->first_chpid = cd->chpid.id; | |
403 | scpcd_area->last_chpid = cd->chpid.id; | |
404 | ||
405 | ccode = chsc(scpcd_area); | |
406 | if (ccode != 0) { | |
407 | ret = -EIO; | |
408 | goto out_free; | |
409 | } | |
410 | if (scpcd_area->response.code != 0x0001) { | |
411 | ret = -EIO; | |
412 | CHSC_MSG(0, "scpcd: response code=%x\n", | |
413 | scpcd_area->response.code); | |
414 | goto out_free; | |
415 | } | |
416 | memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length); | |
417 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
418 | ret = -EFAULT; | |
419 | else | |
420 | ret = 0; | |
421 | out_free: | |
422 | kfree(cd); | |
423 | free_page((unsigned long)scpcd_area); | |
424 | return ret; | |
425 | } | |
426 | ||
427 | static int chsc_ioctl_info_cu(void __user *user_cd) | |
428 | { | |
429 | struct chsc_cu_cd *cd; | |
430 | int ret, ccode; | |
431 | struct { | |
432 | struct chsc_header request; | |
433 | u32 : 2; | |
434 | u32 m : 1; | |
435 | u32 : 1; | |
436 | u32 fmt1 : 4; | |
437 | u32 cssid : 8; | |
438 | u32 : 8; | |
439 | u32 first_cun : 8; | |
440 | u32 : 24; | |
441 | u32 last_cun : 8; | |
442 | u32 : 32; | |
443 | struct chsc_header response; | |
444 | u8 data[PAGE_SIZE - 20]; | |
445 | } __attribute__ ((packed)) *scucd_area; | |
446 | ||
447 | scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
448 | if (!scucd_area) | |
449 | return -ENOMEM; | |
450 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
451 | if (!cd) { | |
452 | ret = -ENOMEM; | |
453 | goto out_free; | |
454 | } | |
455 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
456 | ret = -EFAULT; | |
457 | goto out_free; | |
458 | } | |
459 | scucd_area->request.length = 0x0010; | |
460 | scucd_area->request.code = 0x0028; | |
461 | scucd_area->m = cd->m; | |
462 | scucd_area->fmt1 = cd->fmt; | |
463 | scucd_area->cssid = cd->cssid; | |
464 | scucd_area->first_cun = cd->cun; | |
465 | scucd_area->last_cun = cd->cun; | |
466 | ||
467 | ccode = chsc(scucd_area); | |
468 | if (ccode != 0) { | |
469 | ret = -EIO; | |
470 | goto out_free; | |
471 | } | |
472 | if (scucd_area->response.code != 0x0001) { | |
473 | ret = -EIO; | |
474 | CHSC_MSG(0, "scucd: response code=%x\n", | |
475 | scucd_area->response.code); | |
476 | goto out_free; | |
477 | } | |
478 | memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length); | |
479 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
480 | ret = -EFAULT; | |
481 | else | |
482 | ret = 0; | |
483 | out_free: | |
484 | kfree(cd); | |
485 | free_page((unsigned long)scucd_area); | |
486 | return ret; | |
487 | } | |
488 | ||
489 | static int chsc_ioctl_info_sch_cu(void __user *user_cud) | |
490 | { | |
491 | struct chsc_sch_cud *cud; | |
492 | int ret, ccode; | |
493 | struct { | |
494 | struct chsc_header request; | |
495 | u32 : 2; | |
496 | u32 m : 1; | |
497 | u32 : 5; | |
498 | u32 fmt1 : 4; | |
499 | u32 : 2; | |
500 | u32 ssid : 2; | |
501 | u32 first_sch : 16; | |
502 | u32 : 8; | |
503 | u32 cssid : 8; | |
504 | u32 last_sch : 16; | |
505 | u32 : 32; | |
506 | struct chsc_header response; | |
507 | u8 data[PAGE_SIZE - 20]; | |
508 | } __attribute__ ((packed)) *sscud_area; | |
509 | ||
510 | sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
511 | if (!sscud_area) | |
512 | return -ENOMEM; | |
513 | cud = kzalloc(sizeof(*cud), GFP_KERNEL); | |
514 | if (!cud) { | |
515 | ret = -ENOMEM; | |
516 | goto out_free; | |
517 | } | |
518 | if (copy_from_user(cud, user_cud, sizeof(*cud))) { | |
519 | ret = -EFAULT; | |
520 | goto out_free; | |
521 | } | |
522 | sscud_area->request.length = 0x0010; | |
523 | sscud_area->request.code = 0x0006; | |
524 | sscud_area->m = cud->schid.m; | |
525 | sscud_area->fmt1 = cud->fmt; | |
526 | sscud_area->ssid = cud->schid.ssid; | |
527 | sscud_area->first_sch = cud->schid.sch_no; | |
528 | sscud_area->cssid = cud->schid.cssid; | |
529 | sscud_area->last_sch = cud->schid.sch_no; | |
530 | ||
531 | ccode = chsc(sscud_area); | |
532 | if (ccode != 0) { | |
533 | ret = -EIO; | |
534 | goto out_free; | |
535 | } | |
536 | if (sscud_area->response.code != 0x0001) { | |
537 | ret = -EIO; | |
538 | CHSC_MSG(0, "sscud: response code=%x\n", | |
539 | sscud_area->response.code); | |
540 | goto out_free; | |
541 | } | |
542 | memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length); | |
543 | if (copy_to_user(user_cud, cud, sizeof(*cud))) | |
544 | ret = -EFAULT; | |
545 | else | |
546 | ret = 0; | |
547 | out_free: | |
548 | kfree(cud); | |
549 | free_page((unsigned long)sscud_area); | |
550 | return ret; | |
551 | } | |
552 | ||
553 | static int chsc_ioctl_conf_info(void __user *user_ci) | |
554 | { | |
555 | struct chsc_conf_info *ci; | |
556 | int ret, ccode; | |
557 | struct { | |
558 | struct chsc_header request; | |
559 | u32 : 2; | |
560 | u32 m : 1; | |
561 | u32 : 1; | |
562 | u32 fmt1 : 4; | |
563 | u32 cssid : 8; | |
564 | u32 : 6; | |
565 | u32 ssid : 2; | |
566 | u32 : 8; | |
567 | u64 : 64; | |
568 | struct chsc_header response; | |
569 | u8 data[PAGE_SIZE - 20]; | |
570 | } __attribute__ ((packed)) *sci_area; | |
571 | ||
572 | sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
573 | if (!sci_area) | |
574 | return -ENOMEM; | |
575 | ci = kzalloc(sizeof(*ci), GFP_KERNEL); | |
576 | if (!ci) { | |
577 | ret = -ENOMEM; | |
578 | goto out_free; | |
579 | } | |
580 | if (copy_from_user(ci, user_ci, sizeof(*ci))) { | |
581 | ret = -EFAULT; | |
582 | goto out_free; | |
583 | } | |
584 | sci_area->request.length = 0x0010; | |
585 | sci_area->request.code = 0x0012; | |
586 | sci_area->m = ci->id.m; | |
587 | sci_area->fmt1 = ci->fmt; | |
588 | sci_area->cssid = ci->id.cssid; | |
589 | sci_area->ssid = ci->id.ssid; | |
590 | ||
591 | ccode = chsc(sci_area); | |
592 | if (ccode != 0) { | |
593 | ret = -EIO; | |
594 | goto out_free; | |
595 | } | |
596 | if (sci_area->response.code != 0x0001) { | |
597 | ret = -EIO; | |
598 | CHSC_MSG(0, "sci: response code=%x\n", | |
599 | sci_area->response.code); | |
600 | goto out_free; | |
601 | } | |
602 | memcpy(&ci->scid, &sci_area->response, sci_area->response.length); | |
603 | if (copy_to_user(user_ci, ci, sizeof(*ci))) | |
604 | ret = -EFAULT; | |
605 | else | |
606 | ret = 0; | |
607 | out_free: | |
608 | kfree(ci); | |
609 | free_page((unsigned long)sci_area); | |
610 | return ret; | |
611 | } | |
612 | ||
613 | static int chsc_ioctl_conf_comp_list(void __user *user_ccl) | |
614 | { | |
615 | struct chsc_comp_list *ccl; | |
616 | int ret, ccode; | |
617 | struct { | |
618 | struct chsc_header request; | |
619 | u32 ctype : 8; | |
620 | u32 : 4; | |
621 | u32 fmt : 4; | |
622 | u32 : 16; | |
623 | u64 : 64; | |
624 | u32 list_parm[2]; | |
625 | u64 : 64; | |
626 | struct chsc_header response; | |
627 | u8 data[PAGE_SIZE - 36]; | |
628 | } __attribute__ ((packed)) *sccl_area; | |
629 | struct { | |
630 | u32 m : 1; | |
631 | u32 : 31; | |
632 | u32 cssid : 8; | |
633 | u32 : 16; | |
634 | u32 chpid : 8; | |
635 | } __attribute__ ((packed)) *chpid_parm; | |
636 | struct { | |
637 | u32 f_cssid : 8; | |
638 | u32 l_cssid : 8; | |
639 | u32 : 16; | |
640 | u32 res; | |
641 | } __attribute__ ((packed)) *cssids_parm; | |
642 | ||
643 | sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
644 | if (!sccl_area) | |
645 | return -ENOMEM; | |
646 | ccl = kzalloc(sizeof(*ccl), GFP_KERNEL); | |
647 | if (!ccl) { | |
648 | ret = -ENOMEM; | |
649 | goto out_free; | |
650 | } | |
651 | if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) { | |
652 | ret = -EFAULT; | |
653 | goto out_free; | |
654 | } | |
655 | sccl_area->request.length = 0x0020; | |
656 | sccl_area->request.code = 0x0030; | |
657 | sccl_area->fmt = ccl->req.fmt; | |
658 | sccl_area->ctype = ccl->req.ctype; | |
659 | switch (sccl_area->ctype) { | |
660 | case CCL_CU_ON_CHP: | |
661 | case CCL_IOP_CHP: | |
662 | chpid_parm = (void *)&sccl_area->list_parm; | |
663 | chpid_parm->m = ccl->req.chpid.m; | |
664 | chpid_parm->cssid = ccl->req.chpid.chp.cssid; | |
665 | chpid_parm->chpid = ccl->req.chpid.chp.id; | |
666 | break; | |
667 | case CCL_CSS_IMG: | |
668 | case CCL_CSS_IMG_CONF_CHAR: | |
669 | cssids_parm = (void *)&sccl_area->list_parm; | |
670 | cssids_parm->f_cssid = ccl->req.cssids.f_cssid; | |
671 | cssids_parm->l_cssid = ccl->req.cssids.l_cssid; | |
672 | break; | |
673 | } | |
674 | ccode = chsc(sccl_area); | |
675 | if (ccode != 0) { | |
676 | ret = -EIO; | |
677 | goto out_free; | |
678 | } | |
679 | if (sccl_area->response.code != 0x0001) { | |
680 | ret = -EIO; | |
681 | CHSC_MSG(0, "sccl: response code=%x\n", | |
682 | sccl_area->response.code); | |
683 | goto out_free; | |
684 | } | |
685 | memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length); | |
686 | if (copy_to_user(user_ccl, ccl, sizeof(*ccl))) | |
687 | ret = -EFAULT; | |
688 | else | |
689 | ret = 0; | |
690 | out_free: | |
691 | kfree(ccl); | |
692 | free_page((unsigned long)sccl_area); | |
693 | return ret; | |
694 | } | |
695 | ||
696 | static int chsc_ioctl_chpd(void __user *user_chpd) | |
697 | { | |
906c9768 | 698 | struct chsc_scpd *scpd_area; |
9d92a7e1 CH |
699 | struct chsc_cpd_info *chpd; |
700 | int ret; | |
701 | ||
702 | chpd = kzalloc(sizeof(*chpd), GFP_KERNEL); | |
906c9768 SO |
703 | scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
704 | if (!scpd_area || !chpd) { | |
705 | ret = -ENOMEM; | |
706 | goto out_free; | |
707 | } | |
9d92a7e1 CH |
708 | if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) { |
709 | ret = -EFAULT; | |
710 | goto out_free; | |
711 | } | |
712 | ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt, | |
713 | chpd->rfmt, chpd->c, chpd->m, | |
906c9768 | 714 | scpd_area); |
9d92a7e1 CH |
715 | if (ret) |
716 | goto out_free; | |
906c9768 | 717 | memcpy(&chpd->chpdb, &scpd_area->response, scpd_area->response.length); |
9d92a7e1 CH |
718 | if (copy_to_user(user_chpd, chpd, sizeof(*chpd))) |
719 | ret = -EFAULT; | |
720 | out_free: | |
721 | kfree(chpd); | |
906c9768 | 722 | free_page((unsigned long)scpd_area); |
9d92a7e1 CH |
723 | return ret; |
724 | } | |
725 | ||
726 | static int chsc_ioctl_dcal(void __user *user_dcal) | |
727 | { | |
728 | struct chsc_dcal *dcal; | |
729 | int ret, ccode; | |
730 | struct { | |
731 | struct chsc_header request; | |
732 | u32 atype : 8; | |
733 | u32 : 4; | |
734 | u32 fmt : 4; | |
735 | u32 : 16; | |
736 | u32 res0[2]; | |
737 | u32 list_parm[2]; | |
738 | u32 res1[2]; | |
739 | struct chsc_header response; | |
740 | u8 data[PAGE_SIZE - 36]; | |
741 | } __attribute__ ((packed)) *sdcal_area; | |
742 | ||
743 | sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
744 | if (!sdcal_area) | |
745 | return -ENOMEM; | |
746 | dcal = kzalloc(sizeof(*dcal), GFP_KERNEL); | |
747 | if (!dcal) { | |
748 | ret = -ENOMEM; | |
749 | goto out_free; | |
750 | } | |
751 | if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) { | |
752 | ret = -EFAULT; | |
753 | goto out_free; | |
754 | } | |
755 | sdcal_area->request.length = 0x0020; | |
756 | sdcal_area->request.code = 0x0034; | |
757 | sdcal_area->atype = dcal->req.atype; | |
758 | sdcal_area->fmt = dcal->req.fmt; | |
759 | memcpy(&sdcal_area->list_parm, &dcal->req.list_parm, | |
760 | sizeof(sdcal_area->list_parm)); | |
761 | ||
762 | ccode = chsc(sdcal_area); | |
763 | if (ccode != 0) { | |
764 | ret = -EIO; | |
765 | goto out_free; | |
766 | } | |
767 | if (sdcal_area->response.code != 0x0001) { | |
768 | ret = -EIO; | |
769 | CHSC_MSG(0, "sdcal: response code=%x\n", | |
770 | sdcal_area->response.code); | |
771 | goto out_free; | |
772 | } | |
773 | memcpy(&dcal->sdcal, &sdcal_area->response, | |
774 | sdcal_area->response.length); | |
775 | if (copy_to_user(user_dcal, dcal, sizeof(*dcal))) | |
776 | ret = -EFAULT; | |
777 | else | |
778 | ret = 0; | |
779 | out_free: | |
780 | kfree(dcal); | |
781 | free_page((unsigned long)sdcal_area); | |
782 | return ret; | |
783 | } | |
784 | ||
785 | static long chsc_ioctl(struct file *filp, unsigned int cmd, | |
786 | unsigned long arg) | |
787 | { | |
44ee6a85 HC |
788 | void __user *argp; |
789 | ||
9d92a7e1 | 790 | CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd); |
44ee6a85 HC |
791 | if (is_compat_task()) |
792 | argp = compat_ptr(arg); | |
793 | else | |
794 | argp = (void __user *)arg; | |
9d92a7e1 CH |
795 | switch (cmd) { |
796 | case CHSC_START: | |
44ee6a85 | 797 | return chsc_ioctl_start(argp); |
9d92a7e1 | 798 | case CHSC_INFO_CHANNEL_PATH: |
44ee6a85 | 799 | return chsc_ioctl_info_channel_path(argp); |
9d92a7e1 | 800 | case CHSC_INFO_CU: |
44ee6a85 | 801 | return chsc_ioctl_info_cu(argp); |
9d92a7e1 | 802 | case CHSC_INFO_SCH_CU: |
44ee6a85 | 803 | return chsc_ioctl_info_sch_cu(argp); |
9d92a7e1 | 804 | case CHSC_INFO_CI: |
44ee6a85 | 805 | return chsc_ioctl_conf_info(argp); |
9d92a7e1 | 806 | case CHSC_INFO_CCL: |
44ee6a85 | 807 | return chsc_ioctl_conf_comp_list(argp); |
9d92a7e1 | 808 | case CHSC_INFO_CPD: |
44ee6a85 | 809 | return chsc_ioctl_chpd(argp); |
9d92a7e1 | 810 | case CHSC_INFO_DCAL: |
44ee6a85 | 811 | return chsc_ioctl_dcal(argp); |
9d92a7e1 CH |
812 | default: /* unknown ioctl number */ |
813 | return -ENOIOCTLCMD; | |
814 | } | |
815 | } | |
816 | ||
817 | static const struct file_operations chsc_fops = { | |
818 | .owner = THIS_MODULE, | |
58ea91c0 | 819 | .open = nonseekable_open, |
9d92a7e1 CH |
820 | .unlocked_ioctl = chsc_ioctl, |
821 | .compat_ioctl = chsc_ioctl, | |
6038f373 | 822 | .llseek = no_llseek, |
9d92a7e1 CH |
823 | }; |
824 | ||
825 | static struct miscdevice chsc_misc_device = { | |
826 | .minor = MISC_DYNAMIC_MINOR, | |
827 | .name = "chsc", | |
828 | .fops = &chsc_fops, | |
829 | }; | |
830 | ||
831 | static int __init chsc_misc_init(void) | |
832 | { | |
833 | return misc_register(&chsc_misc_device); | |
834 | } | |
835 | ||
836 | static void chsc_misc_cleanup(void) | |
837 | { | |
838 | misc_deregister(&chsc_misc_device); | |
839 | } | |
840 | ||
841 | static int __init chsc_sch_init(void) | |
842 | { | |
843 | int ret; | |
844 | ||
845 | ret = chsc_init_dbfs(); | |
846 | if (ret) | |
847 | return ret; | |
848 | isc_register(CHSC_SCH_ISC); | |
849 | ret = chsc_init_sch_driver(); | |
850 | if (ret) | |
851 | goto out_dbf; | |
852 | ret = chsc_misc_init(); | |
853 | if (ret) | |
854 | goto out_driver; | |
855 | return ret; | |
856 | out_driver: | |
857 | chsc_cleanup_sch_driver(); | |
858 | out_dbf: | |
859 | isc_unregister(CHSC_SCH_ISC); | |
860 | chsc_remove_dbfs(); | |
861 | return ret; | |
862 | } | |
863 | ||
864 | static void __exit chsc_sch_exit(void) | |
865 | { | |
866 | chsc_misc_cleanup(); | |
867 | chsc_cleanup_sch_driver(); | |
868 | isc_unregister(CHSC_SCH_ISC); | |
869 | chsc_remove_dbfs(); | |
870 | } | |
871 | ||
872 | module_init(chsc_sch_init); | |
873 | module_exit(chsc_sch_exit); |