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Commit | Line | Data |
---|---|---|
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 | ||
e9a8f32a MH |
32 | static struct chsc_request *on_close_request; |
33 | static struct chsc_async_area *on_close_chsc_area; | |
34 | static DEFINE_MUTEX(on_close_mutex); | |
35 | ||
9d92a7e1 CH |
36 | #define CHSC_MSG(imp, args...) do { \ |
37 | debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \ | |
38 | } while (0) | |
39 | ||
40 | #define CHSC_LOG(imp, txt) do { \ | |
41 | debug_text_event(chsc_debug_log_id, imp , txt); \ | |
42 | } while (0) | |
43 | ||
44 | static void CHSC_LOG_HEX(int level, void *data, int length) | |
45 | { | |
46 | while (length > 0) { | |
47 | debug_event(chsc_debug_log_id, level, data, length); | |
48 | length -= chsc_debug_log_id->buf_size; | |
49 | data += chsc_debug_log_id->buf_size; | |
50 | } | |
51 | } | |
52 | ||
53 | MODULE_AUTHOR("IBM Corporation"); | |
54 | MODULE_DESCRIPTION("driver for s390 chsc subchannels"); | |
55 | MODULE_LICENSE("GPL"); | |
56 | ||
57 | static void chsc_subchannel_irq(struct subchannel *sch) | |
58 | { | |
85fb534e | 59 | struct chsc_private *private = dev_get_drvdata(&sch->dev); |
9d92a7e1 | 60 | struct chsc_request *request = private->request; |
0bf7fcf1 | 61 | struct irb *irb = this_cpu_ptr(&cio_irb); |
9d92a7e1 CH |
62 | |
63 | CHSC_LOG(4, "irb"); | |
64 | CHSC_LOG_HEX(4, irb, sizeof(*irb)); | |
420f42ec | 65 | inc_irq_stat(IRQIO_CSC); |
65b4e403 | 66 | |
9d92a7e1 CH |
67 | /* Copy irb to provided request and set done. */ |
68 | if (!request) { | |
69 | CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n", | |
70 | sch->schid.ssid, sch->schid.sch_no); | |
71 | return; | |
72 | } | |
73 | private->request = NULL; | |
74 | memcpy(&request->irb, irb, sizeof(*irb)); | |
cdb912a4 | 75 | cio_update_schib(sch); |
9d92a7e1 CH |
76 | complete(&request->completion); |
77 | put_device(&sch->dev); | |
78 | } | |
79 | ||
80 | static int chsc_subchannel_probe(struct subchannel *sch) | |
81 | { | |
82 | struct chsc_private *private; | |
83 | int ret; | |
84 | ||
85 | CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n", | |
86 | sch->schid.ssid, sch->schid.sch_no); | |
87 | sch->isc = CHSC_SCH_ISC; | |
88 | private = kzalloc(sizeof(*private), GFP_KERNEL); | |
89 | if (!private) | |
90 | return -ENOMEM; | |
85fb534e | 91 | dev_set_drvdata(&sch->dev, private); |
9d92a7e1 CH |
92 | ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch); |
93 | if (ret) { | |
94 | CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n", | |
95 | sch->schid.ssid, sch->schid.sch_no, ret); | |
85fb534e | 96 | dev_set_drvdata(&sch->dev, NULL); |
9d92a7e1 CH |
97 | kfree(private); |
98 | } else { | |
f67f129e ML |
99 | if (dev_get_uevent_suppress(&sch->dev)) { |
100 | dev_set_uevent_suppress(&sch->dev, 0); | |
9d92a7e1 CH |
101 | kobject_uevent(&sch->dev.kobj, KOBJ_ADD); |
102 | } | |
103 | } | |
104 | return ret; | |
105 | } | |
106 | ||
107 | static int chsc_subchannel_remove(struct subchannel *sch) | |
108 | { | |
109 | struct chsc_private *private; | |
110 | ||
111 | cio_disable_subchannel(sch); | |
85fb534e SO |
112 | private = dev_get_drvdata(&sch->dev); |
113 | dev_set_drvdata(&sch->dev, NULL); | |
9d92a7e1 CH |
114 | if (private->request) { |
115 | complete(&private->request->completion); | |
116 | put_device(&sch->dev); | |
117 | } | |
118 | kfree(private); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static void chsc_subchannel_shutdown(struct subchannel *sch) | |
123 | { | |
124 | cio_disable_subchannel(sch); | |
125 | } | |
126 | ||
ad285ae9 CH |
127 | static int chsc_subchannel_prepare(struct subchannel *sch) |
128 | { | |
129 | int cc; | |
130 | struct schib schib; | |
131 | /* | |
132 | * Don't allow suspend while the subchannel is not idle | |
133 | * since we don't have a way to clear the subchannel and | |
134 | * cannot disable it with a request running. | |
135 | */ | |
8821d24c | 136 | cc = stsch_err(sch->schid, &schib); |
ad285ae9 CH |
137 | if (!cc && scsw_stctl(&schib.scsw)) |
138 | return -EAGAIN; | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int chsc_subchannel_freeze(struct subchannel *sch) | |
143 | { | |
144 | return cio_disable_subchannel(sch); | |
145 | } | |
146 | ||
147 | static int chsc_subchannel_restore(struct subchannel *sch) | |
148 | { | |
149 | return cio_enable_subchannel(sch, (u32)(unsigned long)sch); | |
150 | } | |
151 | ||
9d92a7e1 CH |
152 | static struct css_device_id chsc_subchannel_ids[] = { |
153 | { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, }, | |
154 | { /* end of list */ }, | |
155 | }; | |
156 | MODULE_DEVICE_TABLE(css, chsc_subchannel_ids); | |
157 | ||
158 | static struct css_driver chsc_subchannel_driver = { | |
e6aed122 SO |
159 | .drv = { |
160 | .owner = THIS_MODULE, | |
161 | .name = "chsc_subchannel", | |
162 | }, | |
9d92a7e1 CH |
163 | .subchannel_type = chsc_subchannel_ids, |
164 | .irq = chsc_subchannel_irq, | |
165 | .probe = chsc_subchannel_probe, | |
166 | .remove = chsc_subchannel_remove, | |
167 | .shutdown = chsc_subchannel_shutdown, | |
ad285ae9 CH |
168 | .prepare = chsc_subchannel_prepare, |
169 | .freeze = chsc_subchannel_freeze, | |
170 | .thaw = chsc_subchannel_restore, | |
171 | .restore = chsc_subchannel_restore, | |
9d92a7e1 CH |
172 | }; |
173 | ||
174 | static int __init chsc_init_dbfs(void) | |
175 | { | |
f7e1e65d | 176 | chsc_debug_msg_id = debug_register("chsc_msg", 8, 1, 4 * sizeof(long)); |
9d92a7e1 CH |
177 | if (!chsc_debug_msg_id) |
178 | goto out; | |
179 | debug_register_view(chsc_debug_msg_id, &debug_sprintf_view); | |
180 | debug_set_level(chsc_debug_msg_id, 2); | |
181 | chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16); | |
182 | if (!chsc_debug_log_id) | |
183 | goto out; | |
184 | debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view); | |
185 | debug_set_level(chsc_debug_log_id, 2); | |
186 | return 0; | |
187 | out: | |
188 | if (chsc_debug_msg_id) | |
189 | debug_unregister(chsc_debug_msg_id); | |
190 | return -ENOMEM; | |
191 | } | |
192 | ||
193 | static void chsc_remove_dbfs(void) | |
194 | { | |
195 | debug_unregister(chsc_debug_log_id); | |
196 | debug_unregister(chsc_debug_msg_id); | |
197 | } | |
198 | ||
199 | static int __init chsc_init_sch_driver(void) | |
200 | { | |
201 | return css_driver_register(&chsc_subchannel_driver); | |
202 | } | |
203 | ||
204 | static void chsc_cleanup_sch_driver(void) | |
205 | { | |
206 | css_driver_unregister(&chsc_subchannel_driver); | |
207 | } | |
208 | ||
209 | static DEFINE_SPINLOCK(chsc_lock); | |
210 | ||
211 | static int chsc_subchannel_match_next_free(struct device *dev, void *data) | |
212 | { | |
213 | struct subchannel *sch = to_subchannel(dev); | |
214 | ||
215 | return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw); | |
216 | } | |
217 | ||
218 | static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch) | |
219 | { | |
220 | struct device *dev; | |
221 | ||
222 | dev = driver_find_device(&chsc_subchannel_driver.drv, | |
223 | sch ? &sch->dev : NULL, NULL, | |
224 | chsc_subchannel_match_next_free); | |
225 | return dev ? to_subchannel(dev) : NULL; | |
226 | } | |
227 | ||
228 | /** | |
229 | * chsc_async() - try to start a chsc request asynchronously | |
230 | * @chsc_area: request to be started | |
231 | * @request: request structure to associate | |
232 | * | |
233 | * Tries to start a chsc request on one of the existing chsc subchannels. | |
234 | * Returns: | |
235 | * %0 if the request was performed synchronously | |
236 | * %-EINPROGRESS if the request was successfully started | |
237 | * %-EBUSY if all chsc subchannels are busy | |
238 | * %-ENODEV if no chsc subchannels are available | |
239 | * Context: | |
240 | * interrupts disabled, chsc_lock held | |
241 | */ | |
242 | static int chsc_async(struct chsc_async_area *chsc_area, | |
243 | struct chsc_request *request) | |
244 | { | |
245 | int cc; | |
246 | struct chsc_private *private; | |
247 | struct subchannel *sch = NULL; | |
248 | int ret = -ENODEV; | |
249 | char dbf[10]; | |
250 | ||
d1bf8590 | 251 | chsc_area->header.key = PAGE_DEFAULT_KEY >> 4; |
9d92a7e1 CH |
252 | while ((sch = chsc_get_next_subchannel(sch))) { |
253 | spin_lock(sch->lock); | |
85fb534e | 254 | private = dev_get_drvdata(&sch->dev); |
9d92a7e1 CH |
255 | if (private->request) { |
256 | spin_unlock(sch->lock); | |
257 | ret = -EBUSY; | |
258 | continue; | |
259 | } | |
260 | chsc_area->header.sid = sch->schid; | |
261 | CHSC_LOG(2, "schid"); | |
262 | CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid)); | |
263 | cc = chsc(chsc_area); | |
60d081c5 | 264 | snprintf(dbf, sizeof(dbf), "cc:%d", cc); |
9d92a7e1 CH |
265 | CHSC_LOG(2, dbf); |
266 | switch (cc) { | |
267 | case 0: | |
268 | ret = 0; | |
269 | break; | |
270 | case 1: | |
271 | sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC; | |
272 | ret = -EINPROGRESS; | |
273 | private->request = request; | |
274 | break; | |
275 | case 2: | |
276 | ret = -EBUSY; | |
277 | break; | |
278 | default: | |
279 | ret = -ENODEV; | |
280 | } | |
281 | spin_unlock(sch->lock); | |
282 | CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n", | |
283 | sch->schid.ssid, sch->schid.sch_no, cc); | |
284 | if (ret == -EINPROGRESS) | |
285 | return -EINPROGRESS; | |
286 | put_device(&sch->dev); | |
287 | if (ret == 0) | |
288 | return 0; | |
289 | } | |
290 | return ret; | |
291 | } | |
292 | ||
64150adf | 293 | static void chsc_log_command(void *chsc_area) |
9d92a7e1 CH |
294 | { |
295 | char dbf[10]; | |
296 | ||
60d081c5 | 297 | snprintf(dbf, sizeof(dbf), "CHSC:%x", ((uint16_t *)chsc_area)[1]); |
9d92a7e1 CH |
298 | CHSC_LOG(0, dbf); |
299 | CHSC_LOG_HEX(0, chsc_area, 32); | |
300 | } | |
301 | ||
302 | static int chsc_examine_irb(struct chsc_request *request) | |
303 | { | |
304 | int backed_up; | |
305 | ||
b2bbb642 | 306 | if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND)) |
9d92a7e1 CH |
307 | return -EIO; |
308 | backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK; | |
309 | request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK; | |
310 | if (scsw_cstat(&request->irb.scsw) == 0) | |
311 | return 0; | |
312 | if (!backed_up) | |
313 | return 0; | |
314 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK) | |
315 | return -EIO; | |
316 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK) | |
317 | return -EPERM; | |
318 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK) | |
319 | return -EAGAIN; | |
320 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK) | |
321 | return -EAGAIN; | |
322 | return -EIO; | |
323 | } | |
324 | ||
325 | static int chsc_ioctl_start(void __user *user_area) | |
326 | { | |
327 | struct chsc_request *request; | |
328 | struct chsc_async_area *chsc_area; | |
329 | int ret; | |
330 | char dbf[10]; | |
331 | ||
332 | if (!css_general_characteristics.dynio) | |
333 | /* It makes no sense to try. */ | |
334 | return -EOPNOTSUPP; | |
335 | chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); | |
336 | if (!chsc_area) | |
337 | return -ENOMEM; | |
338 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
339 | if (!request) { | |
340 | ret = -ENOMEM; | |
341 | goto out_free; | |
342 | } | |
343 | init_completion(&request->completion); | |
344 | if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { | |
345 | ret = -EFAULT; | |
346 | goto out_free; | |
347 | } | |
348 | chsc_log_command(chsc_area); | |
349 | spin_lock_irq(&chsc_lock); | |
350 | ret = chsc_async(chsc_area, request); | |
351 | spin_unlock_irq(&chsc_lock); | |
352 | if (ret == -EINPROGRESS) { | |
353 | wait_for_completion(&request->completion); | |
354 | ret = chsc_examine_irb(request); | |
355 | } | |
356 | /* copy area back to user */ | |
357 | if (!ret) | |
358 | if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) | |
359 | ret = -EFAULT; | |
360 | out_free: | |
60d081c5 | 361 | snprintf(dbf, sizeof(dbf), "ret:%d", ret); |
9d92a7e1 CH |
362 | CHSC_LOG(0, dbf); |
363 | kfree(request); | |
364 | free_page((unsigned long)chsc_area); | |
365 | return ret; | |
366 | } | |
367 | ||
e9a8f32a MH |
368 | static int chsc_ioctl_on_close_set(void __user *user_area) |
369 | { | |
370 | char dbf[13]; | |
371 | int ret; | |
372 | ||
373 | mutex_lock(&on_close_mutex); | |
374 | if (on_close_chsc_area) { | |
375 | ret = -EBUSY; | |
376 | goto out_unlock; | |
377 | } | |
378 | on_close_request = kzalloc(sizeof(*on_close_request), GFP_KERNEL); | |
379 | if (!on_close_request) { | |
380 | ret = -ENOMEM; | |
381 | goto out_unlock; | |
382 | } | |
383 | on_close_chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); | |
384 | if (!on_close_chsc_area) { | |
385 | ret = -ENOMEM; | |
386 | goto out_free_request; | |
387 | } | |
388 | if (copy_from_user(on_close_chsc_area, user_area, PAGE_SIZE)) { | |
389 | ret = -EFAULT; | |
390 | goto out_free_chsc; | |
391 | } | |
392 | ret = 0; | |
393 | goto out_unlock; | |
394 | ||
395 | out_free_chsc: | |
396 | free_page((unsigned long)on_close_chsc_area); | |
397 | on_close_chsc_area = NULL; | |
398 | out_free_request: | |
399 | kfree(on_close_request); | |
400 | on_close_request = NULL; | |
401 | out_unlock: | |
402 | mutex_unlock(&on_close_mutex); | |
60d081c5 | 403 | snprintf(dbf, sizeof(dbf), "ocsret:%d", ret); |
e9a8f32a MH |
404 | CHSC_LOG(0, dbf); |
405 | return ret; | |
406 | } | |
407 | ||
408 | static int chsc_ioctl_on_close_remove(void) | |
409 | { | |
410 | char dbf[13]; | |
411 | int ret; | |
412 | ||
413 | mutex_lock(&on_close_mutex); | |
414 | if (!on_close_chsc_area) { | |
415 | ret = -ENOENT; | |
416 | goto out_unlock; | |
417 | } | |
418 | free_page((unsigned long)on_close_chsc_area); | |
419 | on_close_chsc_area = NULL; | |
420 | kfree(on_close_request); | |
421 | on_close_request = NULL; | |
422 | ret = 0; | |
423 | out_unlock: | |
424 | mutex_unlock(&on_close_mutex); | |
60d081c5 | 425 | snprintf(dbf, sizeof(dbf), "ocrret:%d", ret); |
e9a8f32a MH |
426 | CHSC_LOG(0, dbf); |
427 | return ret; | |
428 | } | |
429 | ||
64150adf MH |
430 | static int chsc_ioctl_start_sync(void __user *user_area) |
431 | { | |
432 | struct chsc_sync_area *chsc_area; | |
433 | int ret, ccode; | |
434 | ||
435 | chsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
436 | if (!chsc_area) | |
437 | return -ENOMEM; | |
438 | if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { | |
439 | ret = -EFAULT; | |
440 | goto out_free; | |
441 | } | |
442 | if (chsc_area->header.code & 0x4000) { | |
443 | ret = -EINVAL; | |
444 | goto out_free; | |
445 | } | |
446 | chsc_log_command(chsc_area); | |
447 | ccode = chsc(chsc_area); | |
448 | if (ccode != 0) { | |
449 | ret = -EIO; | |
450 | goto out_free; | |
451 | } | |
452 | if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) | |
453 | ret = -EFAULT; | |
454 | else | |
455 | ret = 0; | |
456 | out_free: | |
457 | free_page((unsigned long)chsc_area); | |
458 | return ret; | |
459 | } | |
460 | ||
9d92a7e1 CH |
461 | static int chsc_ioctl_info_channel_path(void __user *user_cd) |
462 | { | |
463 | struct chsc_chp_cd *cd; | |
464 | int ret, ccode; | |
465 | struct { | |
466 | struct chsc_header request; | |
467 | u32 : 2; | |
468 | u32 m : 1; | |
469 | u32 : 1; | |
470 | u32 fmt1 : 4; | |
471 | u32 cssid : 8; | |
472 | u32 : 8; | |
473 | u32 first_chpid : 8; | |
474 | u32 : 24; | |
475 | u32 last_chpid : 8; | |
476 | u32 : 32; | |
477 | struct chsc_header response; | |
478 | u8 data[PAGE_SIZE - 20]; | |
479 | } __attribute__ ((packed)) *scpcd_area; | |
480 | ||
481 | scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
482 | if (!scpcd_area) | |
483 | return -ENOMEM; | |
484 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
485 | if (!cd) { | |
486 | ret = -ENOMEM; | |
487 | goto out_free; | |
488 | } | |
489 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
490 | ret = -EFAULT; | |
491 | goto out_free; | |
492 | } | |
493 | scpcd_area->request.length = 0x0010; | |
494 | scpcd_area->request.code = 0x0028; | |
495 | scpcd_area->m = cd->m; | |
496 | scpcd_area->fmt1 = cd->fmt; | |
497 | scpcd_area->cssid = cd->chpid.cssid; | |
498 | scpcd_area->first_chpid = cd->chpid.id; | |
499 | scpcd_area->last_chpid = cd->chpid.id; | |
500 | ||
501 | ccode = chsc(scpcd_area); | |
502 | if (ccode != 0) { | |
503 | ret = -EIO; | |
504 | goto out_free; | |
505 | } | |
506 | if (scpcd_area->response.code != 0x0001) { | |
507 | ret = -EIO; | |
508 | CHSC_MSG(0, "scpcd: response code=%x\n", | |
509 | scpcd_area->response.code); | |
510 | goto out_free; | |
511 | } | |
512 | memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length); | |
513 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
514 | ret = -EFAULT; | |
515 | else | |
516 | ret = 0; | |
517 | out_free: | |
518 | kfree(cd); | |
519 | free_page((unsigned long)scpcd_area); | |
520 | return ret; | |
521 | } | |
522 | ||
523 | static int chsc_ioctl_info_cu(void __user *user_cd) | |
524 | { | |
525 | struct chsc_cu_cd *cd; | |
526 | int ret, ccode; | |
527 | struct { | |
528 | struct chsc_header request; | |
529 | u32 : 2; | |
530 | u32 m : 1; | |
531 | u32 : 1; | |
532 | u32 fmt1 : 4; | |
533 | u32 cssid : 8; | |
534 | u32 : 8; | |
535 | u32 first_cun : 8; | |
536 | u32 : 24; | |
537 | u32 last_cun : 8; | |
538 | u32 : 32; | |
539 | struct chsc_header response; | |
540 | u8 data[PAGE_SIZE - 20]; | |
541 | } __attribute__ ((packed)) *scucd_area; | |
542 | ||
543 | scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
544 | if (!scucd_area) | |
545 | return -ENOMEM; | |
546 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
547 | if (!cd) { | |
548 | ret = -ENOMEM; | |
549 | goto out_free; | |
550 | } | |
551 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
552 | ret = -EFAULT; | |
553 | goto out_free; | |
554 | } | |
555 | scucd_area->request.length = 0x0010; | |
556 | scucd_area->request.code = 0x0028; | |
557 | scucd_area->m = cd->m; | |
558 | scucd_area->fmt1 = cd->fmt; | |
559 | scucd_area->cssid = cd->cssid; | |
560 | scucd_area->first_cun = cd->cun; | |
561 | scucd_area->last_cun = cd->cun; | |
562 | ||
563 | ccode = chsc(scucd_area); | |
564 | if (ccode != 0) { | |
565 | ret = -EIO; | |
566 | goto out_free; | |
567 | } | |
568 | if (scucd_area->response.code != 0x0001) { | |
569 | ret = -EIO; | |
570 | CHSC_MSG(0, "scucd: response code=%x\n", | |
571 | scucd_area->response.code); | |
572 | goto out_free; | |
573 | } | |
574 | memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length); | |
575 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
576 | ret = -EFAULT; | |
577 | else | |
578 | ret = 0; | |
579 | out_free: | |
580 | kfree(cd); | |
581 | free_page((unsigned long)scucd_area); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | static int chsc_ioctl_info_sch_cu(void __user *user_cud) | |
586 | { | |
587 | struct chsc_sch_cud *cud; | |
588 | int ret, ccode; | |
589 | struct { | |
590 | struct chsc_header request; | |
591 | u32 : 2; | |
592 | u32 m : 1; | |
593 | u32 : 5; | |
594 | u32 fmt1 : 4; | |
595 | u32 : 2; | |
596 | u32 ssid : 2; | |
597 | u32 first_sch : 16; | |
598 | u32 : 8; | |
599 | u32 cssid : 8; | |
600 | u32 last_sch : 16; | |
601 | u32 : 32; | |
602 | struct chsc_header response; | |
603 | u8 data[PAGE_SIZE - 20]; | |
604 | } __attribute__ ((packed)) *sscud_area; | |
605 | ||
606 | sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
607 | if (!sscud_area) | |
608 | return -ENOMEM; | |
609 | cud = kzalloc(sizeof(*cud), GFP_KERNEL); | |
610 | if (!cud) { | |
611 | ret = -ENOMEM; | |
612 | goto out_free; | |
613 | } | |
614 | if (copy_from_user(cud, user_cud, sizeof(*cud))) { | |
615 | ret = -EFAULT; | |
616 | goto out_free; | |
617 | } | |
618 | sscud_area->request.length = 0x0010; | |
619 | sscud_area->request.code = 0x0006; | |
620 | sscud_area->m = cud->schid.m; | |
621 | sscud_area->fmt1 = cud->fmt; | |
622 | sscud_area->ssid = cud->schid.ssid; | |
623 | sscud_area->first_sch = cud->schid.sch_no; | |
624 | sscud_area->cssid = cud->schid.cssid; | |
625 | sscud_area->last_sch = cud->schid.sch_no; | |
626 | ||
627 | ccode = chsc(sscud_area); | |
628 | if (ccode != 0) { | |
629 | ret = -EIO; | |
630 | goto out_free; | |
631 | } | |
632 | if (sscud_area->response.code != 0x0001) { | |
633 | ret = -EIO; | |
634 | CHSC_MSG(0, "sscud: response code=%x\n", | |
635 | sscud_area->response.code); | |
636 | goto out_free; | |
637 | } | |
638 | memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length); | |
639 | if (copy_to_user(user_cud, cud, sizeof(*cud))) | |
640 | ret = -EFAULT; | |
641 | else | |
642 | ret = 0; | |
643 | out_free: | |
644 | kfree(cud); | |
645 | free_page((unsigned long)sscud_area); | |
646 | return ret; | |
647 | } | |
648 | ||
649 | static int chsc_ioctl_conf_info(void __user *user_ci) | |
650 | { | |
651 | struct chsc_conf_info *ci; | |
652 | int ret, ccode; | |
653 | struct { | |
654 | struct chsc_header request; | |
655 | u32 : 2; | |
656 | u32 m : 1; | |
657 | u32 : 1; | |
658 | u32 fmt1 : 4; | |
659 | u32 cssid : 8; | |
660 | u32 : 6; | |
661 | u32 ssid : 2; | |
662 | u32 : 8; | |
663 | u64 : 64; | |
664 | struct chsc_header response; | |
665 | u8 data[PAGE_SIZE - 20]; | |
666 | } __attribute__ ((packed)) *sci_area; | |
667 | ||
668 | sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
669 | if (!sci_area) | |
670 | return -ENOMEM; | |
671 | ci = kzalloc(sizeof(*ci), GFP_KERNEL); | |
672 | if (!ci) { | |
673 | ret = -ENOMEM; | |
674 | goto out_free; | |
675 | } | |
676 | if (copy_from_user(ci, user_ci, sizeof(*ci))) { | |
677 | ret = -EFAULT; | |
678 | goto out_free; | |
679 | } | |
680 | sci_area->request.length = 0x0010; | |
681 | sci_area->request.code = 0x0012; | |
682 | sci_area->m = ci->id.m; | |
683 | sci_area->fmt1 = ci->fmt; | |
684 | sci_area->cssid = ci->id.cssid; | |
685 | sci_area->ssid = ci->id.ssid; | |
686 | ||
687 | ccode = chsc(sci_area); | |
688 | if (ccode != 0) { | |
689 | ret = -EIO; | |
690 | goto out_free; | |
691 | } | |
692 | if (sci_area->response.code != 0x0001) { | |
693 | ret = -EIO; | |
694 | CHSC_MSG(0, "sci: response code=%x\n", | |
695 | sci_area->response.code); | |
696 | goto out_free; | |
697 | } | |
698 | memcpy(&ci->scid, &sci_area->response, sci_area->response.length); | |
699 | if (copy_to_user(user_ci, ci, sizeof(*ci))) | |
700 | ret = -EFAULT; | |
701 | else | |
702 | ret = 0; | |
703 | out_free: | |
704 | kfree(ci); | |
705 | free_page((unsigned long)sci_area); | |
706 | return ret; | |
707 | } | |
708 | ||
709 | static int chsc_ioctl_conf_comp_list(void __user *user_ccl) | |
710 | { | |
711 | struct chsc_comp_list *ccl; | |
712 | int ret, ccode; | |
713 | struct { | |
714 | struct chsc_header request; | |
715 | u32 ctype : 8; | |
716 | u32 : 4; | |
717 | u32 fmt : 4; | |
718 | u32 : 16; | |
719 | u64 : 64; | |
720 | u32 list_parm[2]; | |
721 | u64 : 64; | |
722 | struct chsc_header response; | |
723 | u8 data[PAGE_SIZE - 36]; | |
724 | } __attribute__ ((packed)) *sccl_area; | |
725 | struct { | |
726 | u32 m : 1; | |
727 | u32 : 31; | |
728 | u32 cssid : 8; | |
729 | u32 : 16; | |
730 | u32 chpid : 8; | |
731 | } __attribute__ ((packed)) *chpid_parm; | |
732 | struct { | |
733 | u32 f_cssid : 8; | |
734 | u32 l_cssid : 8; | |
735 | u32 : 16; | |
736 | u32 res; | |
737 | } __attribute__ ((packed)) *cssids_parm; | |
738 | ||
739 | sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
740 | if (!sccl_area) | |
741 | return -ENOMEM; | |
742 | ccl = kzalloc(sizeof(*ccl), GFP_KERNEL); | |
743 | if (!ccl) { | |
744 | ret = -ENOMEM; | |
745 | goto out_free; | |
746 | } | |
747 | if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) { | |
748 | ret = -EFAULT; | |
749 | goto out_free; | |
750 | } | |
751 | sccl_area->request.length = 0x0020; | |
752 | sccl_area->request.code = 0x0030; | |
753 | sccl_area->fmt = ccl->req.fmt; | |
754 | sccl_area->ctype = ccl->req.ctype; | |
755 | switch (sccl_area->ctype) { | |
756 | case CCL_CU_ON_CHP: | |
757 | case CCL_IOP_CHP: | |
758 | chpid_parm = (void *)&sccl_area->list_parm; | |
759 | chpid_parm->m = ccl->req.chpid.m; | |
760 | chpid_parm->cssid = ccl->req.chpid.chp.cssid; | |
761 | chpid_parm->chpid = ccl->req.chpid.chp.id; | |
762 | break; | |
763 | case CCL_CSS_IMG: | |
764 | case CCL_CSS_IMG_CONF_CHAR: | |
765 | cssids_parm = (void *)&sccl_area->list_parm; | |
766 | cssids_parm->f_cssid = ccl->req.cssids.f_cssid; | |
767 | cssids_parm->l_cssid = ccl->req.cssids.l_cssid; | |
768 | break; | |
769 | } | |
770 | ccode = chsc(sccl_area); | |
771 | if (ccode != 0) { | |
772 | ret = -EIO; | |
773 | goto out_free; | |
774 | } | |
775 | if (sccl_area->response.code != 0x0001) { | |
776 | ret = -EIO; | |
777 | CHSC_MSG(0, "sccl: response code=%x\n", | |
778 | sccl_area->response.code); | |
779 | goto out_free; | |
780 | } | |
781 | memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length); | |
782 | if (copy_to_user(user_ccl, ccl, sizeof(*ccl))) | |
783 | ret = -EFAULT; | |
784 | else | |
785 | ret = 0; | |
786 | out_free: | |
787 | kfree(ccl); | |
788 | free_page((unsigned long)sccl_area); | |
789 | return ret; | |
790 | } | |
791 | ||
792 | static int chsc_ioctl_chpd(void __user *user_chpd) | |
793 | { | |
906c9768 | 794 | struct chsc_scpd *scpd_area; |
9d92a7e1 CH |
795 | struct chsc_cpd_info *chpd; |
796 | int ret; | |
797 | ||
798 | chpd = kzalloc(sizeof(*chpd), GFP_KERNEL); | |
906c9768 SO |
799 | scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
800 | if (!scpd_area || !chpd) { | |
801 | ret = -ENOMEM; | |
802 | goto out_free; | |
803 | } | |
9d92a7e1 CH |
804 | if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) { |
805 | ret = -EFAULT; | |
806 | goto out_free; | |
807 | } | |
808 | ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt, | |
809 | chpd->rfmt, chpd->c, chpd->m, | |
906c9768 | 810 | scpd_area); |
9d92a7e1 CH |
811 | if (ret) |
812 | goto out_free; | |
906c9768 | 813 | memcpy(&chpd->chpdb, &scpd_area->response, scpd_area->response.length); |
9d92a7e1 CH |
814 | if (copy_to_user(user_chpd, chpd, sizeof(*chpd))) |
815 | ret = -EFAULT; | |
816 | out_free: | |
817 | kfree(chpd); | |
906c9768 | 818 | free_page((unsigned long)scpd_area); |
9d92a7e1 CH |
819 | return ret; |
820 | } | |
821 | ||
822 | static int chsc_ioctl_dcal(void __user *user_dcal) | |
823 | { | |
824 | struct chsc_dcal *dcal; | |
825 | int ret, ccode; | |
826 | struct { | |
827 | struct chsc_header request; | |
828 | u32 atype : 8; | |
829 | u32 : 4; | |
830 | u32 fmt : 4; | |
831 | u32 : 16; | |
832 | u32 res0[2]; | |
833 | u32 list_parm[2]; | |
834 | u32 res1[2]; | |
835 | struct chsc_header response; | |
836 | u8 data[PAGE_SIZE - 36]; | |
837 | } __attribute__ ((packed)) *sdcal_area; | |
838 | ||
839 | sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
840 | if (!sdcal_area) | |
841 | return -ENOMEM; | |
842 | dcal = kzalloc(sizeof(*dcal), GFP_KERNEL); | |
843 | if (!dcal) { | |
844 | ret = -ENOMEM; | |
845 | goto out_free; | |
846 | } | |
847 | if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) { | |
848 | ret = -EFAULT; | |
849 | goto out_free; | |
850 | } | |
851 | sdcal_area->request.length = 0x0020; | |
852 | sdcal_area->request.code = 0x0034; | |
853 | sdcal_area->atype = dcal->req.atype; | |
854 | sdcal_area->fmt = dcal->req.fmt; | |
855 | memcpy(&sdcal_area->list_parm, &dcal->req.list_parm, | |
856 | sizeof(sdcal_area->list_parm)); | |
857 | ||
858 | ccode = chsc(sdcal_area); | |
859 | if (ccode != 0) { | |
860 | ret = -EIO; | |
861 | goto out_free; | |
862 | } | |
863 | if (sdcal_area->response.code != 0x0001) { | |
864 | ret = -EIO; | |
865 | CHSC_MSG(0, "sdcal: response code=%x\n", | |
866 | sdcal_area->response.code); | |
867 | goto out_free; | |
868 | } | |
869 | memcpy(&dcal->sdcal, &sdcal_area->response, | |
870 | sdcal_area->response.length); | |
871 | if (copy_to_user(user_dcal, dcal, sizeof(*dcal))) | |
872 | ret = -EFAULT; | |
873 | else | |
874 | ret = 0; | |
875 | out_free: | |
876 | kfree(dcal); | |
877 | free_page((unsigned long)sdcal_area); | |
878 | return ret; | |
879 | } | |
880 | ||
881 | static long chsc_ioctl(struct file *filp, unsigned int cmd, | |
882 | unsigned long arg) | |
883 | { | |
44ee6a85 HC |
884 | void __user *argp; |
885 | ||
9d92a7e1 | 886 | CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd); |
44ee6a85 HC |
887 | if (is_compat_task()) |
888 | argp = compat_ptr(arg); | |
889 | else | |
890 | argp = (void __user *)arg; | |
9d92a7e1 CH |
891 | switch (cmd) { |
892 | case CHSC_START: | |
44ee6a85 | 893 | return chsc_ioctl_start(argp); |
64150adf MH |
894 | case CHSC_START_SYNC: |
895 | return chsc_ioctl_start_sync(argp); | |
9d92a7e1 | 896 | case CHSC_INFO_CHANNEL_PATH: |
44ee6a85 | 897 | return chsc_ioctl_info_channel_path(argp); |
9d92a7e1 | 898 | case CHSC_INFO_CU: |
44ee6a85 | 899 | return chsc_ioctl_info_cu(argp); |
9d92a7e1 | 900 | case CHSC_INFO_SCH_CU: |
44ee6a85 | 901 | return chsc_ioctl_info_sch_cu(argp); |
9d92a7e1 | 902 | case CHSC_INFO_CI: |
44ee6a85 | 903 | return chsc_ioctl_conf_info(argp); |
9d92a7e1 | 904 | case CHSC_INFO_CCL: |
44ee6a85 | 905 | return chsc_ioctl_conf_comp_list(argp); |
9d92a7e1 | 906 | case CHSC_INFO_CPD: |
44ee6a85 | 907 | return chsc_ioctl_chpd(argp); |
9d92a7e1 | 908 | case CHSC_INFO_DCAL: |
44ee6a85 | 909 | return chsc_ioctl_dcal(argp); |
e9a8f32a MH |
910 | case CHSC_ON_CLOSE_SET: |
911 | return chsc_ioctl_on_close_set(argp); | |
912 | case CHSC_ON_CLOSE_REMOVE: | |
913 | return chsc_ioctl_on_close_remove(); | |
9d92a7e1 CH |
914 | default: /* unknown ioctl number */ |
915 | return -ENOIOCTLCMD; | |
916 | } | |
917 | } | |
918 | ||
7a9cc6e1 MH |
919 | static atomic_t chsc_ready_for_use = ATOMIC_INIT(1); |
920 | ||
921 | static int chsc_open(struct inode *inode, struct file *file) | |
922 | { | |
923 | if (!atomic_dec_and_test(&chsc_ready_for_use)) { | |
924 | atomic_inc(&chsc_ready_for_use); | |
925 | return -EBUSY; | |
926 | } | |
927 | return nonseekable_open(inode, file); | |
928 | } | |
929 | ||
930 | static int chsc_release(struct inode *inode, struct file *filp) | |
931 | { | |
e9a8f32a MH |
932 | char dbf[13]; |
933 | int ret; | |
934 | ||
935 | mutex_lock(&on_close_mutex); | |
936 | if (!on_close_chsc_area) | |
937 | goto out_unlock; | |
938 | init_completion(&on_close_request->completion); | |
939 | CHSC_LOG(0, "on_close"); | |
940 | chsc_log_command(on_close_chsc_area); | |
941 | spin_lock_irq(&chsc_lock); | |
942 | ret = chsc_async(on_close_chsc_area, on_close_request); | |
943 | spin_unlock_irq(&chsc_lock); | |
944 | if (ret == -EINPROGRESS) { | |
945 | wait_for_completion(&on_close_request->completion); | |
946 | ret = chsc_examine_irb(on_close_request); | |
947 | } | |
60d081c5 | 948 | snprintf(dbf, sizeof(dbf), "relret:%d", ret); |
e9a8f32a MH |
949 | CHSC_LOG(0, dbf); |
950 | free_page((unsigned long)on_close_chsc_area); | |
951 | on_close_chsc_area = NULL; | |
952 | kfree(on_close_request); | |
953 | on_close_request = NULL; | |
954 | out_unlock: | |
955 | mutex_unlock(&on_close_mutex); | |
7a9cc6e1 MH |
956 | atomic_inc(&chsc_ready_for_use); |
957 | return 0; | |
958 | } | |
959 | ||
9d92a7e1 CH |
960 | static const struct file_operations chsc_fops = { |
961 | .owner = THIS_MODULE, | |
7a9cc6e1 MH |
962 | .open = chsc_open, |
963 | .release = chsc_release, | |
9d92a7e1 CH |
964 | .unlocked_ioctl = chsc_ioctl, |
965 | .compat_ioctl = chsc_ioctl, | |
6038f373 | 966 | .llseek = no_llseek, |
9d92a7e1 CH |
967 | }; |
968 | ||
969 | static struct miscdevice chsc_misc_device = { | |
970 | .minor = MISC_DYNAMIC_MINOR, | |
971 | .name = "chsc", | |
972 | .fops = &chsc_fops, | |
973 | }; | |
974 | ||
975 | static int __init chsc_misc_init(void) | |
976 | { | |
977 | return misc_register(&chsc_misc_device); | |
978 | } | |
979 | ||
980 | static void chsc_misc_cleanup(void) | |
981 | { | |
982 | misc_deregister(&chsc_misc_device); | |
983 | } | |
984 | ||
985 | static int __init chsc_sch_init(void) | |
986 | { | |
987 | int ret; | |
988 | ||
989 | ret = chsc_init_dbfs(); | |
990 | if (ret) | |
991 | return ret; | |
992 | isc_register(CHSC_SCH_ISC); | |
993 | ret = chsc_init_sch_driver(); | |
994 | if (ret) | |
995 | goto out_dbf; | |
996 | ret = chsc_misc_init(); | |
997 | if (ret) | |
998 | goto out_driver; | |
999 | return ret; | |
1000 | out_driver: | |
1001 | chsc_cleanup_sch_driver(); | |
1002 | out_dbf: | |
1003 | isc_unregister(CHSC_SCH_ISC); | |
1004 | chsc_remove_dbfs(); | |
1005 | return ret; | |
1006 | } | |
1007 | ||
1008 | static void __exit chsc_sch_exit(void) | |
1009 | { | |
1010 | chsc_misc_cleanup(); | |
1011 | chsc_cleanup_sch_driver(); | |
1012 | isc_unregister(CHSC_SCH_ISC); | |
1013 | chsc_remove_dbfs(); | |
1014 | } | |
1015 | ||
1016 | module_init(chsc_sch_init); | |
1017 | module_exit(chsc_sch_exit); |