Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/s390/cio/device_ops.c | |
3 | * | |
1da177e4 LT |
4 | * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, |
5 | * IBM Corporation | |
6 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) | |
4ce3b30c | 7 | * Cornelia Huck (cornelia.huck@de.ibm.com) |
1da177e4 | 8 | */ |
1da177e4 LT |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> | |
11 | #include <linux/errno.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/list.h> | |
14 | #include <linux/device.h> | |
15 | #include <linux/delay.h> | |
16 | ||
17 | #include <asm/ccwdev.h> | |
18 | #include <asm/idals.h> | |
1da177e4 LT |
19 | |
20 | #include "cio.h" | |
21 | #include "cio_debug.h" | |
22 | #include "css.h" | |
23 | #include "chsc.h" | |
24 | #include "device.h" | |
1da177e4 LT |
25 | |
26 | int | |
27 | ccw_device_set_options(struct ccw_device *cdev, unsigned long flags) | |
28 | { | |
29 | /* | |
30 | * The flag usage is mutal exclusive ... | |
31 | */ | |
32 | if ((flags & CCWDEV_EARLY_NOTIFICATION) && | |
33 | (flags & CCWDEV_REPORT_ALL)) | |
34 | return -EINVAL; | |
35 | cdev->private->options.fast = (flags & CCWDEV_EARLY_NOTIFICATION) != 0; | |
36 | cdev->private->options.repall = (flags & CCWDEV_REPORT_ALL) != 0; | |
37 | cdev->private->options.pgroup = (flags & CCWDEV_DO_PATHGROUP) != 0; | |
38 | cdev->private->options.force = (flags & CCWDEV_ALLOW_FORCE) != 0; | |
39 | return 0; | |
40 | } | |
41 | ||
42 | int | |
43 | ccw_device_clear(struct ccw_device *cdev, unsigned long intparm) | |
44 | { | |
45 | struct subchannel *sch; | |
46 | int ret; | |
47 | ||
48 | if (!cdev) | |
49 | return -ENODEV; | |
50 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
51 | return -ENODEV; | |
52 | if (cdev->private->state != DEV_STATE_ONLINE && | |
1da177e4 LT |
53 | cdev->private->state != DEV_STATE_W4SENSE) |
54 | return -EINVAL; | |
55 | sch = to_subchannel(cdev->dev.parent); | |
56 | if (!sch) | |
57 | return -ENODEV; | |
58 | ret = cio_clear(sch); | |
59 | if (ret == 0) | |
60 | cdev->private->intparm = intparm; | |
61 | return ret; | |
62 | } | |
63 | ||
64 | int | |
65 | ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa, | |
66 | unsigned long intparm, __u8 lpm, __u8 key, | |
67 | unsigned long flags) | |
68 | { | |
69 | struct subchannel *sch; | |
70 | int ret; | |
71 | ||
72 | if (!cdev) | |
73 | return -ENODEV; | |
74 | sch = to_subchannel(cdev->dev.parent); | |
75 | if (!sch) | |
76 | return -ENODEV; | |
77 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
78 | return -ENODEV; | |
b4f7b1ee CH |
79 | if (cdev->private->state == DEV_STATE_VERIFY || |
80 | cdev->private->state == DEV_STATE_CLEAR_VERIFY) { | |
1da177e4 LT |
81 | /* Remember to fake irb when finished. */ |
82 | if (!cdev->private->flags.fake_irb) { | |
83 | cdev->private->flags.fake_irb = 1; | |
84 | cdev->private->intparm = intparm; | |
85 | return 0; | |
86 | } else | |
87 | /* There's already a fake I/O around. */ | |
88 | return -EBUSY; | |
89 | } | |
90 | if (cdev->private->state != DEV_STATE_ONLINE || | |
91 | ((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) && | |
92 | !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) || | |
93 | cdev->private->flags.doverify) | |
94 | return -EBUSY; | |
95 | ret = cio_set_options (sch, flags); | |
96 | if (ret) | |
97 | return ret; | |
e0e32c8e PO |
98 | /* Adjust requested path mask to excluded varied off paths. */ |
99 | if (lpm) { | |
100 | lpm &= sch->opm; | |
101 | if (lpm == 0) | |
102 | return -EACCES; | |
103 | } | |
1da177e4 LT |
104 | ret = cio_start_key (sch, cpa, lpm, key); |
105 | if (ret == 0) | |
106 | cdev->private->intparm = intparm; | |
107 | return ret; | |
108 | } | |
109 | ||
110 | ||
111 | int | |
112 | ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa, | |
113 | unsigned long intparm, __u8 lpm, __u8 key, | |
114 | unsigned long flags, int expires) | |
115 | { | |
116 | int ret; | |
117 | ||
118 | if (!cdev) | |
119 | return -ENODEV; | |
120 | ccw_device_set_timeout(cdev, expires); | |
121 | ret = ccw_device_start_key(cdev, cpa, intparm, lpm, key, flags); | |
122 | if (ret != 0) | |
123 | ccw_device_set_timeout(cdev, 0); | |
124 | return ret; | |
125 | } | |
126 | ||
127 | int | |
128 | ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa, | |
129 | unsigned long intparm, __u8 lpm, unsigned long flags) | |
130 | { | |
131 | return ccw_device_start_key(cdev, cpa, intparm, lpm, | |
0b642ede | 132 | PAGE_DEFAULT_KEY, flags); |
1da177e4 LT |
133 | } |
134 | ||
135 | int | |
136 | ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa, | |
137 | unsigned long intparm, __u8 lpm, unsigned long flags, | |
138 | int expires) | |
139 | { | |
140 | return ccw_device_start_timeout_key(cdev, cpa, intparm, lpm, | |
0b642ede | 141 | PAGE_DEFAULT_KEY, flags, |
1da177e4 LT |
142 | expires); |
143 | } | |
144 | ||
145 | ||
146 | int | |
147 | ccw_device_halt(struct ccw_device *cdev, unsigned long intparm) | |
148 | { | |
149 | struct subchannel *sch; | |
150 | int ret; | |
151 | ||
152 | if (!cdev) | |
153 | return -ENODEV; | |
154 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
155 | return -ENODEV; | |
156 | if (cdev->private->state != DEV_STATE_ONLINE && | |
1da177e4 LT |
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 | ||
f1ee3281 CH |
217 | /* Clear pending timers for device driver initiated I/O. */ |
218 | if (ending_status) | |
219 | ccw_device_set_timeout(cdev, 0); | |
1da177e4 LT |
220 | /* |
221 | * Now we are ready to call the device driver interrupt handler. | |
222 | */ | |
223 | if (cdev->handler) | |
224 | cdev->handler(cdev, cdev->private->intparm, | |
225 | &cdev->private->irb); | |
226 | ||
227 | /* | |
228 | * Clear the old and now useless interrupt response block. | |
229 | */ | |
230 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
231 | ||
232 | return 1; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Search for CIW command in extended sense data. | |
237 | */ | |
238 | struct ciw * | |
239 | ccw_device_get_ciw(struct ccw_device *cdev, __u32 ct) | |
240 | { | |
241 | int ciw_cnt; | |
242 | ||
243 | if (cdev->private->flags.esid == 0) | |
244 | return NULL; | |
245 | for (ciw_cnt = 0; ciw_cnt < MAX_CIWS; ciw_cnt++) | |
246 | if (cdev->private->senseid.ciw[ciw_cnt].ct == ct) | |
247 | return cdev->private->senseid.ciw + ciw_cnt; | |
248 | return NULL; | |
249 | } | |
250 | ||
251 | __u8 | |
252 | ccw_device_get_path_mask(struct ccw_device *cdev) | |
253 | { | |
254 | struct subchannel *sch; | |
255 | ||
256 | sch = to_subchannel(cdev->dev.parent); | |
257 | if (!sch) | |
258 | return 0; | |
259 | else | |
28bdc6f6 | 260 | return sch->lpm; |
1da177e4 LT |
261 | } |
262 | ||
263 | static void | |
264 | ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb) | |
265 | { | |
266 | if (!ip) | |
267 | /* unsolicited interrupt */ | |
268 | return; | |
269 | ||
270 | /* Abuse intparm for error reporting. */ | |
271 | if (IS_ERR(irb)) | |
272 | cdev->private->intparm = -EIO; | |
4bc0c4f9 CH |
273 | else if (irb->scsw.cc == 1) |
274 | /* Retry for deferred condition code. */ | |
275 | cdev->private->intparm = -EAGAIN; | |
1da177e4 LT |
276 | else if ((irb->scsw.dstat != |
277 | (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) || | |
278 | (irb->scsw.cstat != 0)) { | |
279 | /* | |
280 | * We didn't get channel end / device end. Check if path | |
281 | * verification has been started; we can retry after it has | |
282 | * finished. We also retry unit checks except for command reject | |
da039bd1 PO |
283 | * or intervention required. Also check for long busy |
284 | * conditions. | |
1da177e4 LT |
285 | */ |
286 | if (cdev->private->flags.doverify || | |
287 | cdev->private->state == DEV_STATE_VERIFY) | |
288 | cdev->private->intparm = -EAGAIN; | |
3bdc9d0b PO |
289 | else if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) && |
290 | !(irb->ecw[0] & | |
291 | (SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ))) | |
292 | cdev->private->intparm = -EAGAIN; | |
da039bd1 PO |
293 | else if ((irb->scsw.dstat & DEV_STAT_ATTENTION) && |
294 | (irb->scsw.dstat & DEV_STAT_DEV_END) && | |
295 | (irb->scsw.dstat & DEV_STAT_UNIT_EXCEP)) | |
296 | cdev->private->intparm = -EAGAIN; | |
1da177e4 LT |
297 | else |
298 | cdev->private->intparm = -EIO; | |
299 | ||
300 | } else | |
301 | cdev->private->intparm = 0; | |
302 | wake_up(&cdev->private->wait_q); | |
303 | } | |
304 | ||
4d284cac | 305 | static int |
1da177e4 LT |
306 | __ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, __u8 lpm) |
307 | { | |
308 | int ret; | |
309 | struct subchannel *sch; | |
310 | ||
311 | sch = to_subchannel(cdev->dev.parent); | |
312 | do { | |
3230015e | 313 | ccw_device_set_timeout(cdev, 60 * HZ); |
1da177e4 | 314 | ret = cio_start (sch, ccw, lpm); |
3230015e PO |
315 | if (ret != 0) |
316 | ccw_device_set_timeout(cdev, 0); | |
e0e32c8e | 317 | if (ret == -EBUSY) { |
1da177e4 | 318 | /* Try again later. */ |
2ec22984 | 319 | spin_unlock_irq(sch->lock); |
1da177e4 | 320 | msleep(10); |
2ec22984 | 321 | spin_lock_irq(sch->lock); |
1da177e4 LT |
322 | continue; |
323 | } | |
324 | if (ret != 0) | |
325 | /* Non-retryable error. */ | |
326 | break; | |
327 | /* Wait for end of request. */ | |
328 | cdev->private->intparm = magic; | |
2ec22984 | 329 | spin_unlock_irq(sch->lock); |
1da177e4 LT |
330 | wait_event(cdev->private->wait_q, |
331 | (cdev->private->intparm == -EIO) || | |
332 | (cdev->private->intparm == -EAGAIN) || | |
333 | (cdev->private->intparm == 0)); | |
2ec22984 | 334 | spin_lock_irq(sch->lock); |
1da177e4 LT |
335 | /* Check at least for channel end / device end */ |
336 | if (cdev->private->intparm == -EIO) { | |
337 | /* Non-retryable error. */ | |
338 | ret = -EIO; | |
339 | break; | |
340 | } | |
341 | if (cdev->private->intparm == 0) | |
342 | /* Success. */ | |
343 | break; | |
344 | /* Try again later. */ | |
2ec22984 | 345 | spin_unlock_irq(sch->lock); |
1da177e4 | 346 | msleep(10); |
2ec22984 | 347 | spin_lock_irq(sch->lock); |
1da177e4 LT |
348 | } while (1); |
349 | ||
350 | return ret; | |
351 | } | |
352 | ||
353 | /** | |
354 | * read_dev_chars() - read device characteristics | |
355 | * @param cdev target ccw device | |
356 | * @param buffer pointer to buffer for rdc data | |
357 | * @param length size of rdc data | |
358 | * @returns 0 for success, negative error value on failure | |
359 | * | |
360 | * Context: | |
361 | * called for online device, lock not held | |
362 | **/ | |
363 | int | |
364 | read_dev_chars (struct ccw_device *cdev, void **buffer, int length) | |
365 | { | |
366 | void (*handler)(struct ccw_device *, unsigned long, struct irb *); | |
367 | struct subchannel *sch; | |
368 | int ret; | |
369 | struct ccw1 *rdc_ccw; | |
370 | ||
371 | if (!cdev) | |
372 | return -ENODEV; | |
373 | if (!buffer || !length) | |
374 | return -EINVAL; | |
375 | sch = to_subchannel(cdev->dev.parent); | |
376 | ||
377 | CIO_TRACE_EVENT (4, "rddevch"); | |
378 | CIO_TRACE_EVENT (4, sch->dev.bus_id); | |
379 | ||
88abaab4 | 380 | rdc_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
381 | if (!rdc_ccw) |
382 | return -ENOMEM; | |
1da177e4 LT |
383 | rdc_ccw->cmd_code = CCW_CMD_RDC; |
384 | rdc_ccw->count = length; | |
385 | rdc_ccw->flags = CCW_FLAG_SLI; | |
386 | ret = set_normalized_cda (rdc_ccw, (*buffer)); | |
387 | if (ret != 0) { | |
388 | kfree(rdc_ccw); | |
389 | return ret; | |
390 | } | |
391 | ||
2ec22984 | 392 | spin_lock_irq(sch->lock); |
1da177e4 LT |
393 | /* Save interrupt handler. */ |
394 | handler = cdev->handler; | |
395 | /* Temporarily install own handler. */ | |
396 | cdev->handler = ccw_device_wake_up; | |
397 | if (cdev->private->state != DEV_STATE_ONLINE) | |
398 | ret = -ENODEV; | |
399 | else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) && | |
400 | !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) || | |
401 | cdev->private->flags.doverify) | |
402 | ret = -EBUSY; | |
403 | else | |
404 | /* 0x00D9C4C3 == ebcdic "RDC" */ | |
405 | ret = __ccw_device_retry_loop(cdev, rdc_ccw, 0x00D9C4C3, 0); | |
406 | ||
407 | /* Restore interrupt handler. */ | |
408 | cdev->handler = handler; | |
2ec22984 | 409 | spin_unlock_irq(sch->lock); |
1da177e4 LT |
410 | |
411 | clear_normalized_cda (rdc_ccw); | |
412 | kfree(rdc_ccw); | |
413 | ||
414 | return ret; | |
415 | } | |
416 | ||
417 | /* | |
418 | * Read Configuration data using path mask | |
419 | */ | |
420 | int | |
421 | read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lpm) | |
422 | { | |
423 | void (*handler)(struct ccw_device *, unsigned long, struct irb *); | |
424 | struct subchannel *sch; | |
425 | struct ciw *ciw; | |
426 | char *rcd_buf; | |
427 | int ret; | |
428 | struct ccw1 *rcd_ccw; | |
429 | ||
430 | if (!cdev) | |
431 | return -ENODEV; | |
432 | if (!buffer || !length) | |
433 | return -EINVAL; | |
434 | sch = to_subchannel(cdev->dev.parent); | |
435 | ||
436 | CIO_TRACE_EVENT (4, "rdconf"); | |
437 | CIO_TRACE_EVENT (4, sch->dev.bus_id); | |
438 | ||
439 | /* | |
440 | * scan for RCD command in extended SenseID data | |
441 | */ | |
442 | ciw = ccw_device_get_ciw(cdev, CIW_TYPE_RCD); | |
443 | if (!ciw || ciw->cmd == 0) | |
444 | return -EOPNOTSUPP; | |
445 | ||
e0e32c8e PO |
446 | /* Adjust requested path mask to excluded varied off paths. */ |
447 | if (lpm) { | |
448 | lpm &= sch->opm; | |
449 | if (lpm == 0) | |
450 | return -EACCES; | |
451 | } | |
452 | ||
88abaab4 | 453 | rcd_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
454 | if (!rcd_ccw) |
455 | return -ENOMEM; | |
88abaab4 | 456 | rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
457 | if (!rcd_buf) { |
458 | kfree(rcd_ccw); | |
459 | return -ENOMEM; | |
460 | } | |
1da177e4 LT |
461 | rcd_ccw->cmd_code = ciw->cmd; |
462 | rcd_ccw->cda = (__u32) __pa (rcd_buf); | |
463 | rcd_ccw->count = ciw->count; | |
464 | rcd_ccw->flags = CCW_FLAG_SLI; | |
465 | ||
2ec22984 | 466 | spin_lock_irq(sch->lock); |
1da177e4 LT |
467 | /* Save interrupt handler. */ |
468 | handler = cdev->handler; | |
469 | /* Temporarily install own handler. */ | |
470 | cdev->handler = ccw_device_wake_up; | |
471 | if (cdev->private->state != DEV_STATE_ONLINE) | |
472 | ret = -ENODEV; | |
473 | else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) && | |
474 | !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) || | |
475 | cdev->private->flags.doverify) | |
476 | ret = -EBUSY; | |
477 | else | |
478 | /* 0x00D9C3C4 == ebcdic "RCD" */ | |
479 | ret = __ccw_device_retry_loop(cdev, rcd_ccw, 0x00D9C3C4, lpm); | |
480 | ||
481 | /* Restore interrupt handler. */ | |
482 | cdev->handler = handler; | |
2ec22984 | 483 | spin_unlock_irq(sch->lock); |
1da177e4 LT |
484 | |
485 | /* | |
486 | * on success we update the user input parms | |
487 | */ | |
488 | if (ret) { | |
489 | kfree (rcd_buf); | |
490 | *buffer = NULL; | |
491 | *length = 0; | |
492 | } else { | |
493 | *length = ciw->count; | |
494 | *buffer = rcd_buf; | |
495 | } | |
496 | kfree(rcd_ccw); | |
497 | ||
498 | return ret; | |
499 | } | |
500 | ||
501 | /* | |
502 | * Read Configuration data | |
503 | */ | |
504 | int | |
505 | read_conf_data (struct ccw_device *cdev, void **buffer, int *length) | |
506 | { | |
507 | return read_conf_data_lpm (cdev, buffer, length, 0); | |
508 | } | |
509 | ||
510 | /* | |
511 | * Try to break the lock on a boxed device. | |
512 | */ | |
513 | int | |
514 | ccw_device_stlck(struct ccw_device *cdev) | |
515 | { | |
516 | void *buf, *buf2; | |
517 | unsigned long flags; | |
518 | struct subchannel *sch; | |
519 | int ret; | |
520 | ||
521 | if (!cdev) | |
522 | return -ENODEV; | |
523 | ||
524 | if (cdev->drv && !cdev->private->options.force) | |
525 | return -EINVAL; | |
526 | ||
527 | sch = to_subchannel(cdev->dev.parent); | |
528 | ||
529 | CIO_TRACE_EVENT(2, "stl lock"); | |
530 | CIO_TRACE_EVENT(2, cdev->dev.bus_id); | |
531 | ||
532 | buf = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL); | |
533 | if (!buf) | |
534 | return -ENOMEM; | |
535 | buf2 = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL); | |
536 | if (!buf2) { | |
537 | kfree(buf); | |
538 | return -ENOMEM; | |
539 | } | |
2ec22984 | 540 | spin_lock_irqsave(sch->lock, flags); |
1da177e4 LT |
541 | ret = cio_enable_subchannel(sch, 3); |
542 | if (ret) | |
543 | goto out_unlock; | |
544 | /* | |
545 | * Setup ccw. We chain an unconditional reserve and a release so we | |
546 | * only break the lock. | |
547 | */ | |
548 | cdev->private->iccws[0].cmd_code = CCW_CMD_STLCK; | |
549 | cdev->private->iccws[0].cda = (__u32) __pa(buf); | |
550 | cdev->private->iccws[0].count = 32; | |
551 | cdev->private->iccws[0].flags = CCW_FLAG_CC; | |
552 | cdev->private->iccws[1].cmd_code = CCW_CMD_RELEASE; | |
553 | cdev->private->iccws[1].cda = (__u32) __pa(buf2); | |
554 | cdev->private->iccws[1].count = 32; | |
555 | cdev->private->iccws[1].flags = 0; | |
556 | ret = cio_start(sch, cdev->private->iccws, 0); | |
557 | if (ret) { | |
558 | cio_disable_subchannel(sch); //FIXME: return code? | |
559 | goto out_unlock; | |
560 | } | |
561 | cdev->private->irb.scsw.actl |= SCSW_ACTL_START_PEND; | |
2ec22984 | 562 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 | 563 | wait_event(cdev->private->wait_q, cdev->private->irb.scsw.actl == 0); |
2ec22984 | 564 | spin_lock_irqsave(sch->lock, flags); |
1da177e4 LT |
565 | cio_disable_subchannel(sch); //FIXME: return code? |
566 | if ((cdev->private->irb.scsw.dstat != | |
567 | (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) || | |
568 | (cdev->private->irb.scsw.cstat != 0)) | |
569 | ret = -EIO; | |
570 | /* Clear irb. */ | |
571 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
572 | out_unlock: | |
17fd682e JJ |
573 | kfree(buf); |
574 | kfree(buf2); | |
2ec22984 | 575 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
576 | return ret; |
577 | } | |
578 | ||
579 | void * | |
580 | ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_no) | |
581 | { | |
582 | struct subchannel *sch; | |
583 | ||
584 | sch = to_subchannel(cdev->dev.parent); | |
585 | return chsc_get_chp_desc(sch, chp_no); | |
586 | } | |
587 | ||
588 | // FIXME: these have to go: | |
589 | ||
590 | int | |
591 | _ccw_device_get_subchannel_number(struct ccw_device *cdev) | |
592 | { | |
78964268 | 593 | return cdev->private->schid.sch_no; |
1da177e4 LT |
594 | } |
595 | ||
596 | int | |
597 | _ccw_device_get_device_number(struct ccw_device *cdev) | |
598 | { | |
78964268 | 599 | return cdev->private->dev_id.devno; |
1da177e4 LT |
600 | } |
601 | ||
602 | ||
603 | MODULE_LICENSE("GPL"); | |
604 | EXPORT_SYMBOL(ccw_device_set_options); | |
605 | EXPORT_SYMBOL(ccw_device_clear); | |
606 | EXPORT_SYMBOL(ccw_device_halt); | |
607 | EXPORT_SYMBOL(ccw_device_resume); | |
608 | EXPORT_SYMBOL(ccw_device_start_timeout); | |
609 | EXPORT_SYMBOL(ccw_device_start); | |
610 | EXPORT_SYMBOL(ccw_device_start_timeout_key); | |
611 | EXPORT_SYMBOL(ccw_device_start_key); | |
612 | EXPORT_SYMBOL(ccw_device_get_ciw); | |
613 | EXPORT_SYMBOL(ccw_device_get_path_mask); | |
614 | EXPORT_SYMBOL(read_conf_data); | |
615 | EXPORT_SYMBOL(read_dev_chars); | |
616 | EXPORT_SYMBOL(_ccw_device_get_subchannel_number); | |
617 | EXPORT_SYMBOL(_ccw_device_get_device_number); | |
618 | EXPORT_SYMBOL_GPL(ccw_device_get_chp_desc); | |
619 | EXPORT_SYMBOL_GPL(read_conf_data_lpm); |