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1da177e4 LT |
1 | /* |
2 | * drivers/s390/cio/device_ops.c | |
3 | * | |
4 | * $Revision: 1.55 $ | |
5 | * | |
6 | * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, | |
7 | * IBM Corporation | |
8 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) | |
9 | * Cornelia Huck (cohuck@de.ibm.com) | |
10 | */ | |
11 | #include <linux/config.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/list.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/delay.h> | |
19 | ||
20 | #include <asm/ccwdev.h> | |
21 | #include <asm/idals.h> | |
22 | #include <asm/qdio.h> | |
23 | ||
24 | #include "cio.h" | |
25 | #include "cio_debug.h" | |
26 | #include "css.h" | |
27 | #include "chsc.h" | |
28 | #include "device.h" | |
29 | #include "qdio.h" | |
30 | ||
31 | int | |
32 | ccw_device_set_options(struct ccw_device *cdev, unsigned long flags) | |
33 | { | |
34 | /* | |
35 | * The flag usage is mutal exclusive ... | |
36 | */ | |
37 | if ((flags & CCWDEV_EARLY_NOTIFICATION) && | |
38 | (flags & CCWDEV_REPORT_ALL)) | |
39 | return -EINVAL; | |
40 | cdev->private->options.fast = (flags & CCWDEV_EARLY_NOTIFICATION) != 0; | |
41 | cdev->private->options.repall = (flags & CCWDEV_REPORT_ALL) != 0; | |
42 | cdev->private->options.pgroup = (flags & CCWDEV_DO_PATHGROUP) != 0; | |
43 | cdev->private->options.force = (flags & CCWDEV_ALLOW_FORCE) != 0; | |
44 | return 0; | |
45 | } | |
46 | ||
47 | int | |
48 | ccw_device_clear(struct ccw_device *cdev, unsigned long intparm) | |
49 | { | |
50 | struct subchannel *sch; | |
51 | int ret; | |
52 | ||
53 | if (!cdev) | |
54 | return -ENODEV; | |
55 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
56 | return -ENODEV; | |
57 | if (cdev->private->state != DEV_STATE_ONLINE && | |
58 | cdev->private->state != DEV_STATE_WAIT4IO && | |
59 | cdev->private->state != DEV_STATE_W4SENSE) | |
60 | return -EINVAL; | |
61 | sch = to_subchannel(cdev->dev.parent); | |
62 | if (!sch) | |
63 | return -ENODEV; | |
64 | ret = cio_clear(sch); | |
65 | if (ret == 0) | |
66 | cdev->private->intparm = intparm; | |
67 | return ret; | |
68 | } | |
69 | ||
70 | int | |
71 | ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa, | |
72 | unsigned long intparm, __u8 lpm, __u8 key, | |
73 | unsigned long flags) | |
74 | { | |
75 | struct subchannel *sch; | |
76 | int ret; | |
77 | ||
78 | if (!cdev) | |
79 | return -ENODEV; | |
80 | sch = to_subchannel(cdev->dev.parent); | |
81 | if (!sch) | |
82 | return -ENODEV; | |
83 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
84 | return -ENODEV; | |
85 | if (cdev->private->state == DEV_STATE_VERIFY) { | |
86 | /* Remember to fake irb when finished. */ | |
87 | if (!cdev->private->flags.fake_irb) { | |
88 | cdev->private->flags.fake_irb = 1; | |
89 | cdev->private->intparm = intparm; | |
90 | return 0; | |
91 | } else | |
92 | /* There's already a fake I/O around. */ | |
93 | return -EBUSY; | |
94 | } | |
95 | if (cdev->private->state != DEV_STATE_ONLINE || | |
96 | ((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) && | |
97 | !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) || | |
98 | cdev->private->flags.doverify) | |
99 | return -EBUSY; | |
100 | ret = cio_set_options (sch, flags); | |
101 | if (ret) | |
102 | return ret; | |
103 | ret = cio_start_key (sch, cpa, lpm, key); | |
104 | if (ret == 0) | |
105 | cdev->private->intparm = intparm; | |
106 | return ret; | |
107 | } | |
108 | ||
109 | ||
110 | int | |
111 | ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa, | |
112 | unsigned long intparm, __u8 lpm, __u8 key, | |
113 | unsigned long flags, int expires) | |
114 | { | |
115 | int ret; | |
116 | ||
117 | if (!cdev) | |
118 | return -ENODEV; | |
119 | ccw_device_set_timeout(cdev, expires); | |
120 | ret = ccw_device_start_key(cdev, cpa, intparm, lpm, key, flags); | |
121 | if (ret != 0) | |
122 | ccw_device_set_timeout(cdev, 0); | |
123 | return ret; | |
124 | } | |
125 | ||
126 | int | |
127 | ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa, | |
128 | unsigned long intparm, __u8 lpm, unsigned long flags) | |
129 | { | |
130 | return ccw_device_start_key(cdev, cpa, intparm, lpm, | |
131 | default_storage_key, flags); | |
132 | } | |
133 | ||
134 | int | |
135 | ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa, | |
136 | unsigned long intparm, __u8 lpm, unsigned long flags, | |
137 | int expires) | |
138 | { | |
139 | return ccw_device_start_timeout_key(cdev, cpa, intparm, lpm, | |
140 | default_storage_key, flags, | |
141 | expires); | |
142 | } | |
143 | ||
144 | ||
145 | int | |
146 | ccw_device_halt(struct ccw_device *cdev, unsigned long intparm) | |
147 | { | |
148 | struct subchannel *sch; | |
149 | int ret; | |
150 | ||
151 | if (!cdev) | |
152 | return -ENODEV; | |
153 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
154 | return -ENODEV; | |
155 | if (cdev->private->state != DEV_STATE_ONLINE && | |
156 | cdev->private->state != DEV_STATE_WAIT4IO && | |
157 | cdev->private->state != DEV_STATE_W4SENSE) | |
158 | return -EINVAL; | |
159 | sch = to_subchannel(cdev->dev.parent); | |
160 | if (!sch) | |
161 | return -ENODEV; | |
162 | ret = cio_halt(sch); | |
163 | if (ret == 0) | |
164 | cdev->private->intparm = intparm; | |
165 | return ret; | |
166 | } | |
167 | ||
168 | int | |
169 | ccw_device_resume(struct ccw_device *cdev) | |
170 | { | |
171 | struct subchannel *sch; | |
172 | ||
173 | if (!cdev) | |
174 | return -ENODEV; | |
175 | sch = to_subchannel(cdev->dev.parent); | |
176 | if (!sch) | |
177 | return -ENODEV; | |
178 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
179 | return -ENODEV; | |
180 | if (cdev->private->state != DEV_STATE_ONLINE || | |
181 | !(sch->schib.scsw.actl & SCSW_ACTL_SUSPENDED)) | |
182 | return -EINVAL; | |
183 | return cio_resume(sch); | |
184 | } | |
185 | ||
186 | /* | |
187 | * Pass interrupt to device driver. | |
188 | */ | |
189 | int | |
190 | ccw_device_call_handler(struct ccw_device *cdev) | |
191 | { | |
192 | struct subchannel *sch; | |
193 | unsigned int stctl; | |
194 | int ending_status; | |
195 | ||
196 | sch = to_subchannel(cdev->dev.parent); | |
197 | ||
198 | /* | |
199 | * we allow for the device action handler if . | |
200 | * - we received ending status | |
201 | * - the action handler requested to see all interrupts | |
202 | * - we received an intermediate status | |
203 | * - fast notification was requested (primary status) | |
204 | * - unsolicited interrupts | |
205 | */ | |
206 | stctl = cdev->private->irb.scsw.stctl; | |
207 | ending_status = (stctl & SCSW_STCTL_SEC_STATUS) || | |
208 | (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) || | |
209 | (stctl == SCSW_STCTL_STATUS_PEND); | |
210 | if (!ending_status && | |
211 | !cdev->private->options.repall && | |
212 | !(stctl & SCSW_STCTL_INTER_STATUS) && | |
213 | !(cdev->private->options.fast && | |
214 | (stctl & SCSW_STCTL_PRIM_STATUS))) | |
215 | return 0; | |
216 | ||
217 | /* | |
218 | * Now we are ready to call the device driver interrupt handler. | |
219 | */ | |
220 | if (cdev->handler) | |
221 | cdev->handler(cdev, cdev->private->intparm, | |
222 | &cdev->private->irb); | |
223 | ||
224 | /* | |
225 | * Clear the old and now useless interrupt response block. | |
226 | */ | |
227 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
228 | ||
229 | return 1; | |
230 | } | |
231 | ||
232 | /* | |
233 | * Search for CIW command in extended sense data. | |
234 | */ | |
235 | struct ciw * | |
236 | ccw_device_get_ciw(struct ccw_device *cdev, __u32 ct) | |
237 | { | |
238 | int ciw_cnt; | |
239 | ||
240 | if (cdev->private->flags.esid == 0) | |
241 | return NULL; | |
242 | for (ciw_cnt = 0; ciw_cnt < MAX_CIWS; ciw_cnt++) | |
243 | if (cdev->private->senseid.ciw[ciw_cnt].ct == ct) | |
244 | return cdev->private->senseid.ciw + ciw_cnt; | |
245 | return NULL; | |
246 | } | |
247 | ||
248 | __u8 | |
249 | ccw_device_get_path_mask(struct ccw_device *cdev) | |
250 | { | |
251 | struct subchannel *sch; | |
252 | ||
253 | sch = to_subchannel(cdev->dev.parent); | |
254 | if (!sch) | |
255 | return 0; | |
256 | else | |
257 | return sch->vpm; | |
258 | } | |
259 | ||
260 | static void | |
261 | ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb) | |
262 | { | |
263 | if (!ip) | |
264 | /* unsolicited interrupt */ | |
265 | return; | |
266 | ||
267 | /* Abuse intparm for error reporting. */ | |
268 | if (IS_ERR(irb)) | |
269 | cdev->private->intparm = -EIO; | |
270 | else if ((irb->scsw.dstat != | |
271 | (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) || | |
272 | (irb->scsw.cstat != 0)) { | |
273 | /* | |
274 | * We didn't get channel end / device end. Check if path | |
275 | * verification has been started; we can retry after it has | |
276 | * finished. We also retry unit checks except for command reject | |
277 | * or intervention required. | |
278 | */ | |
279 | if (cdev->private->flags.doverify || | |
280 | cdev->private->state == DEV_STATE_VERIFY) | |
281 | cdev->private->intparm = -EAGAIN; | |
282 | if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) && | |
283 | !(irb->ecw[0] & | |
284 | (SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ))) | |
285 | cdev->private->intparm = -EAGAIN; | |
286 | else | |
287 | cdev->private->intparm = -EIO; | |
288 | ||
289 | } else | |
290 | cdev->private->intparm = 0; | |
291 | wake_up(&cdev->private->wait_q); | |
292 | } | |
293 | ||
294 | static inline int | |
295 | __ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, __u8 lpm) | |
296 | { | |
297 | int ret; | |
298 | struct subchannel *sch; | |
299 | ||
300 | sch = to_subchannel(cdev->dev.parent); | |
301 | do { | |
302 | ret = cio_start (sch, ccw, lpm); | |
303 | if ((ret == -EBUSY) || (ret == -EACCES)) { | |
304 | /* Try again later. */ | |
305 | spin_unlock_irq(&sch->lock); | |
306 | msleep(10); | |
307 | spin_lock_irq(&sch->lock); | |
308 | continue; | |
309 | } | |
310 | if (ret != 0) | |
311 | /* Non-retryable error. */ | |
312 | break; | |
313 | /* Wait for end of request. */ | |
314 | cdev->private->intparm = magic; | |
315 | spin_unlock_irq(&sch->lock); | |
316 | wait_event(cdev->private->wait_q, | |
317 | (cdev->private->intparm == -EIO) || | |
318 | (cdev->private->intparm == -EAGAIN) || | |
319 | (cdev->private->intparm == 0)); | |
320 | spin_lock_irq(&sch->lock); | |
321 | /* Check at least for channel end / device end */ | |
322 | if (cdev->private->intparm == -EIO) { | |
323 | /* Non-retryable error. */ | |
324 | ret = -EIO; | |
325 | break; | |
326 | } | |
327 | if (cdev->private->intparm == 0) | |
328 | /* Success. */ | |
329 | break; | |
330 | /* Try again later. */ | |
331 | spin_unlock_irq(&sch->lock); | |
332 | msleep(10); | |
333 | spin_lock_irq(&sch->lock); | |
334 | } while (1); | |
335 | ||
336 | return ret; | |
337 | } | |
338 | ||
339 | /** | |
340 | * read_dev_chars() - read device characteristics | |
341 | * @param cdev target ccw device | |
342 | * @param buffer pointer to buffer for rdc data | |
343 | * @param length size of rdc data | |
344 | * @returns 0 for success, negative error value on failure | |
345 | * | |
346 | * Context: | |
347 | * called for online device, lock not held | |
348 | **/ | |
349 | int | |
350 | read_dev_chars (struct ccw_device *cdev, void **buffer, int length) | |
351 | { | |
352 | void (*handler)(struct ccw_device *, unsigned long, struct irb *); | |
353 | struct subchannel *sch; | |
354 | int ret; | |
355 | struct ccw1 *rdc_ccw; | |
356 | ||
357 | if (!cdev) | |
358 | return -ENODEV; | |
359 | if (!buffer || !length) | |
360 | return -EINVAL; | |
361 | sch = to_subchannel(cdev->dev.parent); | |
362 | ||
363 | CIO_TRACE_EVENT (4, "rddevch"); | |
364 | CIO_TRACE_EVENT (4, sch->dev.bus_id); | |
365 | ||
366 | rdc_ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA); | |
367 | if (!rdc_ccw) | |
368 | return -ENOMEM; | |
369 | memset(rdc_ccw, 0, sizeof(struct ccw1)); | |
370 | rdc_ccw->cmd_code = CCW_CMD_RDC; | |
371 | rdc_ccw->count = length; | |
372 | rdc_ccw->flags = CCW_FLAG_SLI; | |
373 | ret = set_normalized_cda (rdc_ccw, (*buffer)); | |
374 | if (ret != 0) { | |
375 | kfree(rdc_ccw); | |
376 | return ret; | |
377 | } | |
378 | ||
379 | spin_lock_irq(&sch->lock); | |
380 | /* Save interrupt handler. */ | |
381 | handler = cdev->handler; | |
382 | /* Temporarily install own handler. */ | |
383 | cdev->handler = ccw_device_wake_up; | |
384 | if (cdev->private->state != DEV_STATE_ONLINE) | |
385 | ret = -ENODEV; | |
386 | else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) && | |
387 | !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) || | |
388 | cdev->private->flags.doverify) | |
389 | ret = -EBUSY; | |
390 | else | |
391 | /* 0x00D9C4C3 == ebcdic "RDC" */ | |
392 | ret = __ccw_device_retry_loop(cdev, rdc_ccw, 0x00D9C4C3, 0); | |
393 | ||
394 | /* Restore interrupt handler. */ | |
395 | cdev->handler = handler; | |
396 | spin_unlock_irq(&sch->lock); | |
397 | ||
398 | clear_normalized_cda (rdc_ccw); | |
399 | kfree(rdc_ccw); | |
400 | ||
401 | return ret; | |
402 | } | |
403 | ||
404 | /* | |
405 | * Read Configuration data using path mask | |
406 | */ | |
407 | int | |
408 | read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lpm) | |
409 | { | |
410 | void (*handler)(struct ccw_device *, unsigned long, struct irb *); | |
411 | struct subchannel *sch; | |
412 | struct ciw *ciw; | |
413 | char *rcd_buf; | |
414 | int ret; | |
415 | struct ccw1 *rcd_ccw; | |
416 | ||
417 | if (!cdev) | |
418 | return -ENODEV; | |
419 | if (!buffer || !length) | |
420 | return -EINVAL; | |
421 | sch = to_subchannel(cdev->dev.parent); | |
422 | ||
423 | CIO_TRACE_EVENT (4, "rdconf"); | |
424 | CIO_TRACE_EVENT (4, sch->dev.bus_id); | |
425 | ||
426 | /* | |
427 | * scan for RCD command in extended SenseID data | |
428 | */ | |
429 | ciw = ccw_device_get_ciw(cdev, CIW_TYPE_RCD); | |
430 | if (!ciw || ciw->cmd == 0) | |
431 | return -EOPNOTSUPP; | |
432 | ||
433 | rcd_ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA); | |
434 | if (!rcd_ccw) | |
435 | return -ENOMEM; | |
436 | memset(rcd_ccw, 0, sizeof(struct ccw1)); | |
437 | rcd_buf = kmalloc(ciw->count, GFP_KERNEL | GFP_DMA); | |
438 | if (!rcd_buf) { | |
439 | kfree(rcd_ccw); | |
440 | return -ENOMEM; | |
441 | } | |
442 | memset (rcd_buf, 0, ciw->count); | |
443 | rcd_ccw->cmd_code = ciw->cmd; | |
444 | rcd_ccw->cda = (__u32) __pa (rcd_buf); | |
445 | rcd_ccw->count = ciw->count; | |
446 | rcd_ccw->flags = CCW_FLAG_SLI; | |
447 | ||
448 | spin_lock_irq(&sch->lock); | |
449 | /* Save interrupt handler. */ | |
450 | handler = cdev->handler; | |
451 | /* Temporarily install own handler. */ | |
452 | cdev->handler = ccw_device_wake_up; | |
453 | if (cdev->private->state != DEV_STATE_ONLINE) | |
454 | ret = -ENODEV; | |
455 | else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) && | |
456 | !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) || | |
457 | cdev->private->flags.doverify) | |
458 | ret = -EBUSY; | |
459 | else | |
460 | /* 0x00D9C3C4 == ebcdic "RCD" */ | |
461 | ret = __ccw_device_retry_loop(cdev, rcd_ccw, 0x00D9C3C4, lpm); | |
462 | ||
463 | /* Restore interrupt handler. */ | |
464 | cdev->handler = handler; | |
465 | spin_unlock_irq(&sch->lock); | |
466 | ||
467 | /* | |
468 | * on success we update the user input parms | |
469 | */ | |
470 | if (ret) { | |
471 | kfree (rcd_buf); | |
472 | *buffer = NULL; | |
473 | *length = 0; | |
474 | } else { | |
475 | *length = ciw->count; | |
476 | *buffer = rcd_buf; | |
477 | } | |
478 | kfree(rcd_ccw); | |
479 | ||
480 | return ret; | |
481 | } | |
482 | ||
483 | /* | |
484 | * Read Configuration data | |
485 | */ | |
486 | int | |
487 | read_conf_data (struct ccw_device *cdev, void **buffer, int *length) | |
488 | { | |
489 | return read_conf_data_lpm (cdev, buffer, length, 0); | |
490 | } | |
491 | ||
492 | /* | |
493 | * Try to break the lock on a boxed device. | |
494 | */ | |
495 | int | |
496 | ccw_device_stlck(struct ccw_device *cdev) | |
497 | { | |
498 | void *buf, *buf2; | |
499 | unsigned long flags; | |
500 | struct subchannel *sch; | |
501 | int ret; | |
502 | ||
503 | if (!cdev) | |
504 | return -ENODEV; | |
505 | ||
506 | if (cdev->drv && !cdev->private->options.force) | |
507 | return -EINVAL; | |
508 | ||
509 | sch = to_subchannel(cdev->dev.parent); | |
510 | ||
511 | CIO_TRACE_EVENT(2, "stl lock"); | |
512 | CIO_TRACE_EVENT(2, cdev->dev.bus_id); | |
513 | ||
514 | buf = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL); | |
515 | if (!buf) | |
516 | return -ENOMEM; | |
517 | buf2 = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL); | |
518 | if (!buf2) { | |
519 | kfree(buf); | |
520 | return -ENOMEM; | |
521 | } | |
522 | spin_lock_irqsave(&sch->lock, flags); | |
523 | ret = cio_enable_subchannel(sch, 3); | |
524 | if (ret) | |
525 | goto out_unlock; | |
526 | /* | |
527 | * Setup ccw. We chain an unconditional reserve and a release so we | |
528 | * only break the lock. | |
529 | */ | |
530 | cdev->private->iccws[0].cmd_code = CCW_CMD_STLCK; | |
531 | cdev->private->iccws[0].cda = (__u32) __pa(buf); | |
532 | cdev->private->iccws[0].count = 32; | |
533 | cdev->private->iccws[0].flags = CCW_FLAG_CC; | |
534 | cdev->private->iccws[1].cmd_code = CCW_CMD_RELEASE; | |
535 | cdev->private->iccws[1].cda = (__u32) __pa(buf2); | |
536 | cdev->private->iccws[1].count = 32; | |
537 | cdev->private->iccws[1].flags = 0; | |
538 | ret = cio_start(sch, cdev->private->iccws, 0); | |
539 | if (ret) { | |
540 | cio_disable_subchannel(sch); //FIXME: return code? | |
541 | goto out_unlock; | |
542 | } | |
543 | cdev->private->irb.scsw.actl |= SCSW_ACTL_START_PEND; | |
544 | spin_unlock_irqrestore(&sch->lock, flags); | |
545 | wait_event(cdev->private->wait_q, cdev->private->irb.scsw.actl == 0); | |
546 | spin_lock_irqsave(&sch->lock, flags); | |
547 | cio_disable_subchannel(sch); //FIXME: return code? | |
548 | if ((cdev->private->irb.scsw.dstat != | |
549 | (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) || | |
550 | (cdev->private->irb.scsw.cstat != 0)) | |
551 | ret = -EIO; | |
552 | /* Clear irb. */ | |
553 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
554 | out_unlock: | |
555 | if (buf) | |
556 | kfree(buf); | |
557 | if (buf2) | |
558 | kfree(buf2); | |
559 | spin_unlock_irqrestore(&sch->lock, flags); | |
560 | return ret; | |
561 | } | |
562 | ||
563 | void * | |
564 | ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_no) | |
565 | { | |
566 | struct subchannel *sch; | |
567 | ||
568 | sch = to_subchannel(cdev->dev.parent); | |
569 | return chsc_get_chp_desc(sch, chp_no); | |
570 | } | |
571 | ||
572 | // FIXME: these have to go: | |
573 | ||
574 | int | |
575 | _ccw_device_get_subchannel_number(struct ccw_device *cdev) | |
576 | { | |
577 | return cdev->private->irq; | |
578 | } | |
579 | ||
580 | int | |
581 | _ccw_device_get_device_number(struct ccw_device *cdev) | |
582 | { | |
583 | return cdev->private->devno; | |
584 | } | |
585 | ||
586 | ||
587 | MODULE_LICENSE("GPL"); | |
588 | EXPORT_SYMBOL(ccw_device_set_options); | |
589 | EXPORT_SYMBOL(ccw_device_clear); | |
590 | EXPORT_SYMBOL(ccw_device_halt); | |
591 | EXPORT_SYMBOL(ccw_device_resume); | |
592 | EXPORT_SYMBOL(ccw_device_start_timeout); | |
593 | EXPORT_SYMBOL(ccw_device_start); | |
594 | EXPORT_SYMBOL(ccw_device_start_timeout_key); | |
595 | EXPORT_SYMBOL(ccw_device_start_key); | |
596 | EXPORT_SYMBOL(ccw_device_get_ciw); | |
597 | EXPORT_SYMBOL(ccw_device_get_path_mask); | |
598 | EXPORT_SYMBOL(read_conf_data); | |
599 | EXPORT_SYMBOL(read_dev_chars); | |
600 | EXPORT_SYMBOL(_ccw_device_get_subchannel_number); | |
601 | EXPORT_SYMBOL(_ccw_device_get_device_number); | |
602 | EXPORT_SYMBOL_GPL(ccw_device_get_chp_desc); | |
603 | EXPORT_SYMBOL_GPL(read_conf_data_lpm); |