Commit | Line | Data |
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724117b7 | 1 | // SPDX-License-Identifier: GPL-2.0 |
9d92a7e1 CH |
2 | /* |
3 | * Driver for s390 chsc subchannels | |
4 | * | |
65b4e403 | 5 | * Copyright IBM Corp. 2008, 2011 |
ad285ae9 | 6 | * |
9d92a7e1 CH |
7 | * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> |
8 | * | |
9 | */ | |
10 | ||
5a0e3ad6 | 11 | #include <linux/slab.h> |
048cd4e5 | 12 | #include <linux/compat.h> |
9d92a7e1 | 13 | #include <linux/device.h> |
5c2e5a0c | 14 | #include <linux/io.h> |
9d92a7e1 CH |
15 | #include <linux/module.h> |
16 | #include <linux/uaccess.h> | |
17 | #include <linux/miscdevice.h> | |
65b4e403 | 18 | #include <linux/kernel_stat.h> |
9d92a7e1 CH |
19 | |
20 | #include <asm/cio.h> | |
21 | #include <asm/chsc.h> | |
22 | #include <asm/isc.h> | |
23 | ||
24 | #include "cio.h" | |
25 | #include "cio_debug.h" | |
26 | #include "css.h" | |
27 | #include "chsc_sch.h" | |
28 | #include "ioasm.h" | |
29 | ||
30 | static debug_info_t *chsc_debug_msg_id; | |
31 | static debug_info_t *chsc_debug_log_id; | |
32 | ||
e9a8f32a MH |
33 | static struct chsc_request *on_close_request; |
34 | static struct chsc_async_area *on_close_chsc_area; | |
35 | static DEFINE_MUTEX(on_close_mutex); | |
36 | ||
9d92a7e1 CH |
37 | #define CHSC_MSG(imp, args...) do { \ |
38 | debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \ | |
39 | } while (0) | |
40 | ||
41 | #define CHSC_LOG(imp, txt) do { \ | |
42 | debug_text_event(chsc_debug_log_id, imp , txt); \ | |
43 | } while (0) | |
44 | ||
45 | static void CHSC_LOG_HEX(int level, void *data, int length) | |
46 | { | |
94158e54 | 47 | debug_event(chsc_debug_log_id, level, data, length); |
9d92a7e1 CH |
48 | } |
49 | ||
50 | MODULE_AUTHOR("IBM Corporation"); | |
51 | MODULE_DESCRIPTION("driver for s390 chsc subchannels"); | |
52 | MODULE_LICENSE("GPL"); | |
53 | ||
54 | static void chsc_subchannel_irq(struct subchannel *sch) | |
55 | { | |
85fb534e | 56 | struct chsc_private *private = dev_get_drvdata(&sch->dev); |
9d92a7e1 | 57 | struct chsc_request *request = private->request; |
0bf7fcf1 | 58 | struct irb *irb = this_cpu_ptr(&cio_irb); |
9d92a7e1 CH |
59 | |
60 | CHSC_LOG(4, "irb"); | |
61 | CHSC_LOG_HEX(4, irb, sizeof(*irb)); | |
420f42ec | 62 | inc_irq_stat(IRQIO_CSC); |
65b4e403 | 63 | |
9d92a7e1 CH |
64 | /* Copy irb to provided request and set done. */ |
65 | if (!request) { | |
66 | CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n", | |
67 | sch->schid.ssid, sch->schid.sch_no); | |
68 | return; | |
69 | } | |
70 | private->request = NULL; | |
71 | memcpy(&request->irb, irb, sizeof(*irb)); | |
cdb912a4 | 72 | cio_update_schib(sch); |
9d92a7e1 CH |
73 | complete(&request->completion); |
74 | put_device(&sch->dev); | |
75 | } | |
76 | ||
77 | static int chsc_subchannel_probe(struct subchannel *sch) | |
78 | { | |
79 | struct chsc_private *private; | |
80 | int ret; | |
81 | ||
82 | CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n", | |
83 | sch->schid.ssid, sch->schid.sch_no); | |
84 | sch->isc = CHSC_SCH_ISC; | |
85 | private = kzalloc(sizeof(*private), GFP_KERNEL); | |
86 | if (!private) | |
87 | return -ENOMEM; | |
85fb534e | 88 | dev_set_drvdata(&sch->dev, private); |
5c2e5a0c | 89 | ret = cio_enable_subchannel(sch, (u32)virt_to_phys(sch)); |
9d92a7e1 CH |
90 | if (ret) { |
91 | CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n", | |
92 | sch->schid.ssid, sch->schid.sch_no, ret); | |
85fb534e | 93 | dev_set_drvdata(&sch->dev, NULL); |
9d92a7e1 | 94 | kfree(private); |
9d92a7e1 CH |
95 | } |
96 | return ret; | |
97 | } | |
98 | ||
a7bdb9a9 | 99 | static void chsc_subchannel_remove(struct subchannel *sch) |
9d92a7e1 CH |
100 | { |
101 | struct chsc_private *private; | |
102 | ||
103 | cio_disable_subchannel(sch); | |
85fb534e SO |
104 | private = dev_get_drvdata(&sch->dev); |
105 | dev_set_drvdata(&sch->dev, NULL); | |
9d92a7e1 CH |
106 | if (private->request) { |
107 | complete(&private->request->completion); | |
108 | put_device(&sch->dev); | |
109 | } | |
110 | kfree(private); | |
9d92a7e1 CH |
111 | } |
112 | ||
113 | static void chsc_subchannel_shutdown(struct subchannel *sch) | |
114 | { | |
115 | cio_disable_subchannel(sch); | |
116 | } | |
117 | ||
118 | static struct css_device_id chsc_subchannel_ids[] = { | |
119 | { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, }, | |
120 | { /* end of list */ }, | |
121 | }; | |
122 | MODULE_DEVICE_TABLE(css, chsc_subchannel_ids); | |
123 | ||
124 | static struct css_driver chsc_subchannel_driver = { | |
e6aed122 SO |
125 | .drv = { |
126 | .owner = THIS_MODULE, | |
127 | .name = "chsc_subchannel", | |
128 | }, | |
9d92a7e1 CH |
129 | .subchannel_type = chsc_subchannel_ids, |
130 | .irq = chsc_subchannel_irq, | |
131 | .probe = chsc_subchannel_probe, | |
132 | .remove = chsc_subchannel_remove, | |
133 | .shutdown = chsc_subchannel_shutdown, | |
9d92a7e1 CH |
134 | }; |
135 | ||
136 | static int __init chsc_init_dbfs(void) | |
137 | { | |
f7e1e65d | 138 | chsc_debug_msg_id = debug_register("chsc_msg", 8, 1, 4 * sizeof(long)); |
9d92a7e1 CH |
139 | if (!chsc_debug_msg_id) |
140 | goto out; | |
141 | debug_register_view(chsc_debug_msg_id, &debug_sprintf_view); | |
142 | debug_set_level(chsc_debug_msg_id, 2); | |
143 | chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16); | |
144 | if (!chsc_debug_log_id) | |
145 | goto out; | |
146 | debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view); | |
147 | debug_set_level(chsc_debug_log_id, 2); | |
148 | return 0; | |
149 | out: | |
a6e975c5 | 150 | debug_unregister(chsc_debug_msg_id); |
9d92a7e1 CH |
151 | return -ENOMEM; |
152 | } | |
153 | ||
154 | static void chsc_remove_dbfs(void) | |
155 | { | |
156 | debug_unregister(chsc_debug_log_id); | |
157 | debug_unregister(chsc_debug_msg_id); | |
158 | } | |
159 | ||
160 | static int __init chsc_init_sch_driver(void) | |
161 | { | |
162 | return css_driver_register(&chsc_subchannel_driver); | |
163 | } | |
164 | ||
165 | static void chsc_cleanup_sch_driver(void) | |
166 | { | |
167 | css_driver_unregister(&chsc_subchannel_driver); | |
168 | } | |
169 | ||
170 | static DEFINE_SPINLOCK(chsc_lock); | |
171 | ||
92ce7e83 | 172 | static int chsc_subchannel_match_next_free(struct device *dev, const void *data) |
9d92a7e1 CH |
173 | { |
174 | struct subchannel *sch = to_subchannel(dev); | |
175 | ||
176 | return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw); | |
177 | } | |
178 | ||
179 | static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch) | |
180 | { | |
181 | struct device *dev; | |
182 | ||
183 | dev = driver_find_device(&chsc_subchannel_driver.drv, | |
184 | sch ? &sch->dev : NULL, NULL, | |
185 | chsc_subchannel_match_next_free); | |
186 | return dev ? to_subchannel(dev) : NULL; | |
187 | } | |
188 | ||
189 | /** | |
190 | * chsc_async() - try to start a chsc request asynchronously | |
191 | * @chsc_area: request to be started | |
192 | * @request: request structure to associate | |
193 | * | |
194 | * Tries to start a chsc request on one of the existing chsc subchannels. | |
195 | * Returns: | |
196 | * %0 if the request was performed synchronously | |
197 | * %-EINPROGRESS if the request was successfully started | |
198 | * %-EBUSY if all chsc subchannels are busy | |
199 | * %-ENODEV if no chsc subchannels are available | |
200 | * Context: | |
201 | * interrupts disabled, chsc_lock held | |
202 | */ | |
203 | static int chsc_async(struct chsc_async_area *chsc_area, | |
204 | struct chsc_request *request) | |
205 | { | |
206 | int cc; | |
207 | struct chsc_private *private; | |
208 | struct subchannel *sch = NULL; | |
209 | int ret = -ENODEV; | |
210 | char dbf[10]; | |
211 | ||
d1bf8590 | 212 | chsc_area->header.key = PAGE_DEFAULT_KEY >> 4; |
9d92a7e1 CH |
213 | while ((sch = chsc_get_next_subchannel(sch))) { |
214 | spin_lock(sch->lock); | |
85fb534e | 215 | private = dev_get_drvdata(&sch->dev); |
9d92a7e1 CH |
216 | if (private->request) { |
217 | spin_unlock(sch->lock); | |
218 | ret = -EBUSY; | |
219 | continue; | |
220 | } | |
221 | chsc_area->header.sid = sch->schid; | |
222 | CHSC_LOG(2, "schid"); | |
223 | CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid)); | |
224 | cc = chsc(chsc_area); | |
60d081c5 | 225 | snprintf(dbf, sizeof(dbf), "cc:%d", cc); |
9d92a7e1 CH |
226 | CHSC_LOG(2, dbf); |
227 | switch (cc) { | |
228 | case 0: | |
229 | ret = 0; | |
230 | break; | |
231 | case 1: | |
232 | sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC; | |
233 | ret = -EINPROGRESS; | |
234 | private->request = request; | |
235 | break; | |
236 | case 2: | |
237 | ret = -EBUSY; | |
238 | break; | |
239 | default: | |
240 | ret = -ENODEV; | |
241 | } | |
242 | spin_unlock(sch->lock); | |
243 | CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n", | |
244 | sch->schid.ssid, sch->schid.sch_no, cc); | |
245 | if (ret == -EINPROGRESS) | |
246 | return -EINPROGRESS; | |
247 | put_device(&sch->dev); | |
248 | if (ret == 0) | |
249 | return 0; | |
250 | } | |
251 | return ret; | |
252 | } | |
253 | ||
64150adf | 254 | static void chsc_log_command(void *chsc_area) |
9d92a7e1 CH |
255 | { |
256 | char dbf[10]; | |
257 | ||
60d081c5 | 258 | snprintf(dbf, sizeof(dbf), "CHSC:%x", ((uint16_t *)chsc_area)[1]); |
9d92a7e1 CH |
259 | CHSC_LOG(0, dbf); |
260 | CHSC_LOG_HEX(0, chsc_area, 32); | |
261 | } | |
262 | ||
263 | static int chsc_examine_irb(struct chsc_request *request) | |
264 | { | |
265 | int backed_up; | |
266 | ||
b2bbb642 | 267 | if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND)) |
9d92a7e1 CH |
268 | return -EIO; |
269 | backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK; | |
270 | request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK; | |
271 | if (scsw_cstat(&request->irb.scsw) == 0) | |
272 | return 0; | |
273 | if (!backed_up) | |
274 | return 0; | |
275 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK) | |
276 | return -EIO; | |
277 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK) | |
278 | return -EPERM; | |
279 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK) | |
280 | return -EAGAIN; | |
281 | if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK) | |
282 | return -EAGAIN; | |
283 | return -EIO; | |
284 | } | |
285 | ||
286 | static int chsc_ioctl_start(void __user *user_area) | |
287 | { | |
288 | struct chsc_request *request; | |
289 | struct chsc_async_area *chsc_area; | |
290 | int ret; | |
291 | char dbf[10]; | |
292 | ||
293 | if (!css_general_characteristics.dynio) | |
294 | /* It makes no sense to try. */ | |
295 | return -EOPNOTSUPP; | |
296 | chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); | |
297 | if (!chsc_area) | |
298 | return -ENOMEM; | |
299 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
300 | if (!request) { | |
301 | ret = -ENOMEM; | |
302 | goto out_free; | |
303 | } | |
304 | init_completion(&request->completion); | |
305 | if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { | |
306 | ret = -EFAULT; | |
307 | goto out_free; | |
308 | } | |
309 | chsc_log_command(chsc_area); | |
310 | spin_lock_irq(&chsc_lock); | |
311 | ret = chsc_async(chsc_area, request); | |
312 | spin_unlock_irq(&chsc_lock); | |
313 | if (ret == -EINPROGRESS) { | |
314 | wait_for_completion(&request->completion); | |
315 | ret = chsc_examine_irb(request); | |
316 | } | |
317 | /* copy area back to user */ | |
318 | if (!ret) | |
319 | if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) | |
320 | ret = -EFAULT; | |
321 | out_free: | |
60d081c5 | 322 | snprintf(dbf, sizeof(dbf), "ret:%d", ret); |
9d92a7e1 CH |
323 | CHSC_LOG(0, dbf); |
324 | kfree(request); | |
325 | free_page((unsigned long)chsc_area); | |
326 | return ret; | |
327 | } | |
328 | ||
e9a8f32a MH |
329 | static int chsc_ioctl_on_close_set(void __user *user_area) |
330 | { | |
331 | char dbf[13]; | |
332 | int ret; | |
333 | ||
334 | mutex_lock(&on_close_mutex); | |
335 | if (on_close_chsc_area) { | |
336 | ret = -EBUSY; | |
337 | goto out_unlock; | |
338 | } | |
339 | on_close_request = kzalloc(sizeof(*on_close_request), GFP_KERNEL); | |
340 | if (!on_close_request) { | |
341 | ret = -ENOMEM; | |
342 | goto out_unlock; | |
343 | } | |
344 | on_close_chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); | |
345 | if (!on_close_chsc_area) { | |
346 | ret = -ENOMEM; | |
347 | goto out_free_request; | |
348 | } | |
349 | if (copy_from_user(on_close_chsc_area, user_area, PAGE_SIZE)) { | |
350 | ret = -EFAULT; | |
351 | goto out_free_chsc; | |
352 | } | |
353 | ret = 0; | |
354 | goto out_unlock; | |
355 | ||
356 | out_free_chsc: | |
357 | free_page((unsigned long)on_close_chsc_area); | |
358 | on_close_chsc_area = NULL; | |
359 | out_free_request: | |
360 | kfree(on_close_request); | |
361 | on_close_request = NULL; | |
362 | out_unlock: | |
363 | mutex_unlock(&on_close_mutex); | |
60d081c5 | 364 | snprintf(dbf, sizeof(dbf), "ocsret:%d", ret); |
e9a8f32a MH |
365 | CHSC_LOG(0, dbf); |
366 | return ret; | |
367 | } | |
368 | ||
369 | static int chsc_ioctl_on_close_remove(void) | |
370 | { | |
371 | char dbf[13]; | |
372 | int ret; | |
373 | ||
374 | mutex_lock(&on_close_mutex); | |
375 | if (!on_close_chsc_area) { | |
376 | ret = -ENOENT; | |
377 | goto out_unlock; | |
378 | } | |
379 | free_page((unsigned long)on_close_chsc_area); | |
380 | on_close_chsc_area = NULL; | |
381 | kfree(on_close_request); | |
382 | on_close_request = NULL; | |
383 | ret = 0; | |
384 | out_unlock: | |
385 | mutex_unlock(&on_close_mutex); | |
60d081c5 | 386 | snprintf(dbf, sizeof(dbf), "ocrret:%d", ret); |
e9a8f32a MH |
387 | CHSC_LOG(0, dbf); |
388 | return ret; | |
389 | } | |
390 | ||
64150adf MH |
391 | static int chsc_ioctl_start_sync(void __user *user_area) |
392 | { | |
393 | struct chsc_sync_area *chsc_area; | |
394 | int ret, ccode; | |
395 | ||
396 | chsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
397 | if (!chsc_area) | |
398 | return -ENOMEM; | |
399 | if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { | |
400 | ret = -EFAULT; | |
401 | goto out_free; | |
402 | } | |
403 | if (chsc_area->header.code & 0x4000) { | |
404 | ret = -EINVAL; | |
405 | goto out_free; | |
406 | } | |
407 | chsc_log_command(chsc_area); | |
408 | ccode = chsc(chsc_area); | |
409 | if (ccode != 0) { | |
410 | ret = -EIO; | |
411 | goto out_free; | |
412 | } | |
413 | if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) | |
414 | ret = -EFAULT; | |
415 | else | |
416 | ret = 0; | |
417 | out_free: | |
418 | free_page((unsigned long)chsc_area); | |
419 | return ret; | |
420 | } | |
421 | ||
9d92a7e1 CH |
422 | static int chsc_ioctl_info_channel_path(void __user *user_cd) |
423 | { | |
424 | struct chsc_chp_cd *cd; | |
425 | int ret, ccode; | |
426 | struct { | |
427 | struct chsc_header request; | |
428 | u32 : 2; | |
429 | u32 m : 1; | |
430 | u32 : 1; | |
431 | u32 fmt1 : 4; | |
432 | u32 cssid : 8; | |
433 | u32 : 8; | |
434 | u32 first_chpid : 8; | |
435 | u32 : 24; | |
436 | u32 last_chpid : 8; | |
437 | u32 : 32; | |
438 | struct chsc_header response; | |
439 | u8 data[PAGE_SIZE - 20]; | |
440 | } __attribute__ ((packed)) *scpcd_area; | |
441 | ||
442 | scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
443 | if (!scpcd_area) | |
444 | return -ENOMEM; | |
445 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
446 | if (!cd) { | |
447 | ret = -ENOMEM; | |
448 | goto out_free; | |
449 | } | |
450 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
451 | ret = -EFAULT; | |
452 | goto out_free; | |
453 | } | |
454 | scpcd_area->request.length = 0x0010; | |
455 | scpcd_area->request.code = 0x0028; | |
456 | scpcd_area->m = cd->m; | |
457 | scpcd_area->fmt1 = cd->fmt; | |
458 | scpcd_area->cssid = cd->chpid.cssid; | |
459 | scpcd_area->first_chpid = cd->chpid.id; | |
460 | scpcd_area->last_chpid = cd->chpid.id; | |
461 | ||
462 | ccode = chsc(scpcd_area); | |
463 | if (ccode != 0) { | |
464 | ret = -EIO; | |
465 | goto out_free; | |
466 | } | |
467 | if (scpcd_area->response.code != 0x0001) { | |
468 | ret = -EIO; | |
469 | CHSC_MSG(0, "scpcd: response code=%x\n", | |
470 | scpcd_area->response.code); | |
471 | goto out_free; | |
472 | } | |
473 | memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length); | |
474 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
475 | ret = -EFAULT; | |
476 | else | |
477 | ret = 0; | |
478 | out_free: | |
479 | kfree(cd); | |
480 | free_page((unsigned long)scpcd_area); | |
481 | return ret; | |
482 | } | |
483 | ||
484 | static int chsc_ioctl_info_cu(void __user *user_cd) | |
485 | { | |
486 | struct chsc_cu_cd *cd; | |
487 | int ret, ccode; | |
488 | struct { | |
489 | struct chsc_header request; | |
490 | u32 : 2; | |
491 | u32 m : 1; | |
492 | u32 : 1; | |
493 | u32 fmt1 : 4; | |
494 | u32 cssid : 8; | |
495 | u32 : 8; | |
496 | u32 first_cun : 8; | |
497 | u32 : 24; | |
498 | u32 last_cun : 8; | |
499 | u32 : 32; | |
500 | struct chsc_header response; | |
501 | u8 data[PAGE_SIZE - 20]; | |
502 | } __attribute__ ((packed)) *scucd_area; | |
503 | ||
504 | scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
505 | if (!scucd_area) | |
506 | return -ENOMEM; | |
507 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); | |
508 | if (!cd) { | |
509 | ret = -ENOMEM; | |
510 | goto out_free; | |
511 | } | |
512 | if (copy_from_user(cd, user_cd, sizeof(*cd))) { | |
513 | ret = -EFAULT; | |
514 | goto out_free; | |
515 | } | |
516 | scucd_area->request.length = 0x0010; | |
6228c2a5 | 517 | scucd_area->request.code = 0x0026; |
9d92a7e1 CH |
518 | scucd_area->m = cd->m; |
519 | scucd_area->fmt1 = cd->fmt; | |
520 | scucd_area->cssid = cd->cssid; | |
521 | scucd_area->first_cun = cd->cun; | |
522 | scucd_area->last_cun = cd->cun; | |
523 | ||
524 | ccode = chsc(scucd_area); | |
525 | if (ccode != 0) { | |
526 | ret = -EIO; | |
527 | goto out_free; | |
528 | } | |
529 | if (scucd_area->response.code != 0x0001) { | |
530 | ret = -EIO; | |
531 | CHSC_MSG(0, "scucd: response code=%x\n", | |
532 | scucd_area->response.code); | |
533 | goto out_free; | |
534 | } | |
535 | memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length); | |
536 | if (copy_to_user(user_cd, cd, sizeof(*cd))) | |
537 | ret = -EFAULT; | |
538 | else | |
539 | ret = 0; | |
540 | out_free: | |
541 | kfree(cd); | |
542 | free_page((unsigned long)scucd_area); | |
543 | return ret; | |
544 | } | |
545 | ||
546 | static int chsc_ioctl_info_sch_cu(void __user *user_cud) | |
547 | { | |
548 | struct chsc_sch_cud *cud; | |
549 | int ret, ccode; | |
550 | struct { | |
551 | struct chsc_header request; | |
552 | u32 : 2; | |
553 | u32 m : 1; | |
554 | u32 : 5; | |
555 | u32 fmt1 : 4; | |
556 | u32 : 2; | |
557 | u32 ssid : 2; | |
558 | u32 first_sch : 16; | |
559 | u32 : 8; | |
560 | u32 cssid : 8; | |
561 | u32 last_sch : 16; | |
562 | u32 : 32; | |
563 | struct chsc_header response; | |
564 | u8 data[PAGE_SIZE - 20]; | |
565 | } __attribute__ ((packed)) *sscud_area; | |
566 | ||
567 | sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
568 | if (!sscud_area) | |
569 | return -ENOMEM; | |
570 | cud = kzalloc(sizeof(*cud), GFP_KERNEL); | |
571 | if (!cud) { | |
572 | ret = -ENOMEM; | |
573 | goto out_free; | |
574 | } | |
575 | if (copy_from_user(cud, user_cud, sizeof(*cud))) { | |
576 | ret = -EFAULT; | |
577 | goto out_free; | |
578 | } | |
579 | sscud_area->request.length = 0x0010; | |
580 | sscud_area->request.code = 0x0006; | |
581 | sscud_area->m = cud->schid.m; | |
582 | sscud_area->fmt1 = cud->fmt; | |
583 | sscud_area->ssid = cud->schid.ssid; | |
584 | sscud_area->first_sch = cud->schid.sch_no; | |
585 | sscud_area->cssid = cud->schid.cssid; | |
586 | sscud_area->last_sch = cud->schid.sch_no; | |
587 | ||
588 | ccode = chsc(sscud_area); | |
589 | if (ccode != 0) { | |
590 | ret = -EIO; | |
591 | goto out_free; | |
592 | } | |
593 | if (sscud_area->response.code != 0x0001) { | |
594 | ret = -EIO; | |
595 | CHSC_MSG(0, "sscud: response code=%x\n", | |
596 | sscud_area->response.code); | |
597 | goto out_free; | |
598 | } | |
599 | memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length); | |
600 | if (copy_to_user(user_cud, cud, sizeof(*cud))) | |
601 | ret = -EFAULT; | |
602 | else | |
603 | ret = 0; | |
604 | out_free: | |
605 | kfree(cud); | |
606 | free_page((unsigned long)sscud_area); | |
607 | return ret; | |
608 | } | |
609 | ||
610 | static int chsc_ioctl_conf_info(void __user *user_ci) | |
611 | { | |
612 | struct chsc_conf_info *ci; | |
613 | int ret, ccode; | |
614 | struct { | |
615 | struct chsc_header request; | |
616 | u32 : 2; | |
617 | u32 m : 1; | |
618 | u32 : 1; | |
619 | u32 fmt1 : 4; | |
620 | u32 cssid : 8; | |
621 | u32 : 6; | |
622 | u32 ssid : 2; | |
623 | u32 : 8; | |
624 | u64 : 64; | |
625 | struct chsc_header response; | |
626 | u8 data[PAGE_SIZE - 20]; | |
627 | } __attribute__ ((packed)) *sci_area; | |
628 | ||
629 | sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
630 | if (!sci_area) | |
631 | return -ENOMEM; | |
632 | ci = kzalloc(sizeof(*ci), GFP_KERNEL); | |
633 | if (!ci) { | |
634 | ret = -ENOMEM; | |
635 | goto out_free; | |
636 | } | |
637 | if (copy_from_user(ci, user_ci, sizeof(*ci))) { | |
638 | ret = -EFAULT; | |
639 | goto out_free; | |
640 | } | |
641 | sci_area->request.length = 0x0010; | |
642 | sci_area->request.code = 0x0012; | |
643 | sci_area->m = ci->id.m; | |
644 | sci_area->fmt1 = ci->fmt; | |
645 | sci_area->cssid = ci->id.cssid; | |
646 | sci_area->ssid = ci->id.ssid; | |
647 | ||
648 | ccode = chsc(sci_area); | |
649 | if (ccode != 0) { | |
650 | ret = -EIO; | |
651 | goto out_free; | |
652 | } | |
653 | if (sci_area->response.code != 0x0001) { | |
654 | ret = -EIO; | |
655 | CHSC_MSG(0, "sci: response code=%x\n", | |
656 | sci_area->response.code); | |
657 | goto out_free; | |
658 | } | |
659 | memcpy(&ci->scid, &sci_area->response, sci_area->response.length); | |
660 | if (copy_to_user(user_ci, ci, sizeof(*ci))) | |
661 | ret = -EFAULT; | |
662 | else | |
663 | ret = 0; | |
664 | out_free: | |
665 | kfree(ci); | |
666 | free_page((unsigned long)sci_area); | |
667 | return ret; | |
668 | } | |
669 | ||
670 | static int chsc_ioctl_conf_comp_list(void __user *user_ccl) | |
671 | { | |
672 | struct chsc_comp_list *ccl; | |
673 | int ret, ccode; | |
674 | struct { | |
675 | struct chsc_header request; | |
676 | u32 ctype : 8; | |
677 | u32 : 4; | |
678 | u32 fmt : 4; | |
679 | u32 : 16; | |
680 | u64 : 64; | |
681 | u32 list_parm[2]; | |
682 | u64 : 64; | |
683 | struct chsc_header response; | |
684 | u8 data[PAGE_SIZE - 36]; | |
685 | } __attribute__ ((packed)) *sccl_area; | |
686 | struct { | |
687 | u32 m : 1; | |
688 | u32 : 31; | |
689 | u32 cssid : 8; | |
690 | u32 : 16; | |
691 | u32 chpid : 8; | |
692 | } __attribute__ ((packed)) *chpid_parm; | |
693 | struct { | |
694 | u32 f_cssid : 8; | |
695 | u32 l_cssid : 8; | |
696 | u32 : 16; | |
697 | u32 res; | |
698 | } __attribute__ ((packed)) *cssids_parm; | |
699 | ||
700 | sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
701 | if (!sccl_area) | |
702 | return -ENOMEM; | |
703 | ccl = kzalloc(sizeof(*ccl), GFP_KERNEL); | |
704 | if (!ccl) { | |
705 | ret = -ENOMEM; | |
706 | goto out_free; | |
707 | } | |
708 | if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) { | |
709 | ret = -EFAULT; | |
710 | goto out_free; | |
711 | } | |
712 | sccl_area->request.length = 0x0020; | |
713 | sccl_area->request.code = 0x0030; | |
714 | sccl_area->fmt = ccl->req.fmt; | |
715 | sccl_area->ctype = ccl->req.ctype; | |
716 | switch (sccl_area->ctype) { | |
717 | case CCL_CU_ON_CHP: | |
718 | case CCL_IOP_CHP: | |
719 | chpid_parm = (void *)&sccl_area->list_parm; | |
720 | chpid_parm->m = ccl->req.chpid.m; | |
721 | chpid_parm->cssid = ccl->req.chpid.chp.cssid; | |
722 | chpid_parm->chpid = ccl->req.chpid.chp.id; | |
723 | break; | |
724 | case CCL_CSS_IMG: | |
725 | case CCL_CSS_IMG_CONF_CHAR: | |
726 | cssids_parm = (void *)&sccl_area->list_parm; | |
727 | cssids_parm->f_cssid = ccl->req.cssids.f_cssid; | |
728 | cssids_parm->l_cssid = ccl->req.cssids.l_cssid; | |
729 | break; | |
730 | } | |
731 | ccode = chsc(sccl_area); | |
732 | if (ccode != 0) { | |
733 | ret = -EIO; | |
734 | goto out_free; | |
735 | } | |
736 | if (sccl_area->response.code != 0x0001) { | |
737 | ret = -EIO; | |
738 | CHSC_MSG(0, "sccl: response code=%x\n", | |
739 | sccl_area->response.code); | |
740 | goto out_free; | |
741 | } | |
742 | memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length); | |
743 | if (copy_to_user(user_ccl, ccl, sizeof(*ccl))) | |
744 | ret = -EFAULT; | |
745 | else | |
746 | ret = 0; | |
747 | out_free: | |
748 | kfree(ccl); | |
749 | free_page((unsigned long)sccl_area); | |
750 | return ret; | |
751 | } | |
752 | ||
753 | static int chsc_ioctl_chpd(void __user *user_chpd) | |
754 | { | |
906c9768 | 755 | struct chsc_scpd *scpd_area; |
9d92a7e1 CH |
756 | struct chsc_cpd_info *chpd; |
757 | int ret; | |
758 | ||
759 | chpd = kzalloc(sizeof(*chpd), GFP_KERNEL); | |
906c9768 SO |
760 | scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
761 | if (!scpd_area || !chpd) { | |
762 | ret = -ENOMEM; | |
763 | goto out_free; | |
764 | } | |
9d92a7e1 CH |
765 | if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) { |
766 | ret = -EFAULT; | |
767 | goto out_free; | |
768 | } | |
769 | ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt, | |
770 | chpd->rfmt, chpd->c, chpd->m, | |
906c9768 | 771 | scpd_area); |
9d92a7e1 CH |
772 | if (ret) |
773 | goto out_free; | |
906c9768 | 774 | memcpy(&chpd->chpdb, &scpd_area->response, scpd_area->response.length); |
9d92a7e1 CH |
775 | if (copy_to_user(user_chpd, chpd, sizeof(*chpd))) |
776 | ret = -EFAULT; | |
777 | out_free: | |
778 | kfree(chpd); | |
906c9768 | 779 | free_page((unsigned long)scpd_area); |
9d92a7e1 CH |
780 | return ret; |
781 | } | |
782 | ||
783 | static int chsc_ioctl_dcal(void __user *user_dcal) | |
784 | { | |
785 | struct chsc_dcal *dcal; | |
786 | int ret, ccode; | |
787 | struct { | |
788 | struct chsc_header request; | |
789 | u32 atype : 8; | |
790 | u32 : 4; | |
791 | u32 fmt : 4; | |
792 | u32 : 16; | |
793 | u32 res0[2]; | |
794 | u32 list_parm[2]; | |
795 | u32 res1[2]; | |
796 | struct chsc_header response; | |
797 | u8 data[PAGE_SIZE - 36]; | |
798 | } __attribute__ ((packed)) *sdcal_area; | |
799 | ||
800 | sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
801 | if (!sdcal_area) | |
802 | return -ENOMEM; | |
803 | dcal = kzalloc(sizeof(*dcal), GFP_KERNEL); | |
804 | if (!dcal) { | |
805 | ret = -ENOMEM; | |
806 | goto out_free; | |
807 | } | |
808 | if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) { | |
809 | ret = -EFAULT; | |
810 | goto out_free; | |
811 | } | |
812 | sdcal_area->request.length = 0x0020; | |
813 | sdcal_area->request.code = 0x0034; | |
814 | sdcal_area->atype = dcal->req.atype; | |
815 | sdcal_area->fmt = dcal->req.fmt; | |
816 | memcpy(&sdcal_area->list_parm, &dcal->req.list_parm, | |
817 | sizeof(sdcal_area->list_parm)); | |
818 | ||
819 | ccode = chsc(sdcal_area); | |
820 | if (ccode != 0) { | |
821 | ret = -EIO; | |
822 | goto out_free; | |
823 | } | |
824 | if (sdcal_area->response.code != 0x0001) { | |
825 | ret = -EIO; | |
826 | CHSC_MSG(0, "sdcal: response code=%x\n", | |
827 | sdcal_area->response.code); | |
828 | goto out_free; | |
829 | } | |
830 | memcpy(&dcal->sdcal, &sdcal_area->response, | |
831 | sdcal_area->response.length); | |
832 | if (copy_to_user(user_dcal, dcal, sizeof(*dcal))) | |
833 | ret = -EFAULT; | |
834 | else | |
835 | ret = 0; | |
836 | out_free: | |
837 | kfree(dcal); | |
838 | free_page((unsigned long)sdcal_area); | |
839 | return ret; | |
840 | } | |
841 | ||
842 | static long chsc_ioctl(struct file *filp, unsigned int cmd, | |
843 | unsigned long arg) | |
844 | { | |
44ee6a85 HC |
845 | void __user *argp; |
846 | ||
9d92a7e1 | 847 | CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd); |
44ee6a85 HC |
848 | if (is_compat_task()) |
849 | argp = compat_ptr(arg); | |
850 | else | |
851 | argp = (void __user *)arg; | |
9d92a7e1 CH |
852 | switch (cmd) { |
853 | case CHSC_START: | |
44ee6a85 | 854 | return chsc_ioctl_start(argp); |
64150adf MH |
855 | case CHSC_START_SYNC: |
856 | return chsc_ioctl_start_sync(argp); | |
9d92a7e1 | 857 | case CHSC_INFO_CHANNEL_PATH: |
44ee6a85 | 858 | return chsc_ioctl_info_channel_path(argp); |
9d92a7e1 | 859 | case CHSC_INFO_CU: |
44ee6a85 | 860 | return chsc_ioctl_info_cu(argp); |
9d92a7e1 | 861 | case CHSC_INFO_SCH_CU: |
44ee6a85 | 862 | return chsc_ioctl_info_sch_cu(argp); |
9d92a7e1 | 863 | case CHSC_INFO_CI: |
44ee6a85 | 864 | return chsc_ioctl_conf_info(argp); |
9d92a7e1 | 865 | case CHSC_INFO_CCL: |
44ee6a85 | 866 | return chsc_ioctl_conf_comp_list(argp); |
9d92a7e1 | 867 | case CHSC_INFO_CPD: |
44ee6a85 | 868 | return chsc_ioctl_chpd(argp); |
9d92a7e1 | 869 | case CHSC_INFO_DCAL: |
44ee6a85 | 870 | return chsc_ioctl_dcal(argp); |
e9a8f32a MH |
871 | case CHSC_ON_CLOSE_SET: |
872 | return chsc_ioctl_on_close_set(argp); | |
873 | case CHSC_ON_CLOSE_REMOVE: | |
874 | return chsc_ioctl_on_close_remove(); | |
9d92a7e1 CH |
875 | default: /* unknown ioctl number */ |
876 | return -ENOIOCTLCMD; | |
877 | } | |
878 | } | |
879 | ||
7a9cc6e1 MH |
880 | static atomic_t chsc_ready_for_use = ATOMIC_INIT(1); |
881 | ||
882 | static int chsc_open(struct inode *inode, struct file *file) | |
883 | { | |
884 | if (!atomic_dec_and_test(&chsc_ready_for_use)) { | |
885 | atomic_inc(&chsc_ready_for_use); | |
886 | return -EBUSY; | |
887 | } | |
888 | return nonseekable_open(inode, file); | |
889 | } | |
890 | ||
891 | static int chsc_release(struct inode *inode, struct file *filp) | |
892 | { | |
e9a8f32a MH |
893 | char dbf[13]; |
894 | int ret; | |
895 | ||
896 | mutex_lock(&on_close_mutex); | |
897 | if (!on_close_chsc_area) | |
898 | goto out_unlock; | |
899 | init_completion(&on_close_request->completion); | |
900 | CHSC_LOG(0, "on_close"); | |
901 | chsc_log_command(on_close_chsc_area); | |
902 | spin_lock_irq(&chsc_lock); | |
903 | ret = chsc_async(on_close_chsc_area, on_close_request); | |
904 | spin_unlock_irq(&chsc_lock); | |
905 | if (ret == -EINPROGRESS) { | |
906 | wait_for_completion(&on_close_request->completion); | |
907 | ret = chsc_examine_irb(on_close_request); | |
908 | } | |
60d081c5 | 909 | snprintf(dbf, sizeof(dbf), "relret:%d", ret); |
e9a8f32a MH |
910 | CHSC_LOG(0, dbf); |
911 | free_page((unsigned long)on_close_chsc_area); | |
912 | on_close_chsc_area = NULL; | |
913 | kfree(on_close_request); | |
914 | on_close_request = NULL; | |
915 | out_unlock: | |
916 | mutex_unlock(&on_close_mutex); | |
7a9cc6e1 MH |
917 | atomic_inc(&chsc_ready_for_use); |
918 | return 0; | |
919 | } | |
920 | ||
9d92a7e1 CH |
921 | static const struct file_operations chsc_fops = { |
922 | .owner = THIS_MODULE, | |
7a9cc6e1 MH |
923 | .open = chsc_open, |
924 | .release = chsc_release, | |
9d92a7e1 CH |
925 | .unlocked_ioctl = chsc_ioctl, |
926 | .compat_ioctl = chsc_ioctl, | |
6038f373 | 927 | .llseek = no_llseek, |
9d92a7e1 CH |
928 | }; |
929 | ||
930 | static struct miscdevice chsc_misc_device = { | |
931 | .minor = MISC_DYNAMIC_MINOR, | |
932 | .name = "chsc", | |
933 | .fops = &chsc_fops, | |
934 | }; | |
935 | ||
936 | static int __init chsc_misc_init(void) | |
937 | { | |
938 | return misc_register(&chsc_misc_device); | |
939 | } | |
940 | ||
941 | static void chsc_misc_cleanup(void) | |
942 | { | |
943 | misc_deregister(&chsc_misc_device); | |
944 | } | |
945 | ||
946 | static int __init chsc_sch_init(void) | |
947 | { | |
948 | int ret; | |
949 | ||
950 | ret = chsc_init_dbfs(); | |
951 | if (ret) | |
952 | return ret; | |
953 | isc_register(CHSC_SCH_ISC); | |
954 | ret = chsc_init_sch_driver(); | |
955 | if (ret) | |
956 | goto out_dbf; | |
957 | ret = chsc_misc_init(); | |
958 | if (ret) | |
959 | goto out_driver; | |
960 | return ret; | |
961 | out_driver: | |
962 | chsc_cleanup_sch_driver(); | |
963 | out_dbf: | |
964 | isc_unregister(CHSC_SCH_ISC); | |
965 | chsc_remove_dbfs(); | |
966 | return ret; | |
967 | } | |
968 | ||
969 | static void __exit chsc_sch_exit(void) | |
970 | { | |
971 | chsc_misc_cleanup(); | |
972 | chsc_cleanup_sch_driver(); | |
973 | isc_unregister(CHSC_SCH_ISC); | |
974 | chsc_remove_dbfs(); | |
975 | } | |
976 | ||
977 | module_init(chsc_sch_init); | |
978 | module_exit(chsc_sch_exit); |