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Commit | Line | Data |
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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> | |
e5854a58 | 19 | #include <asm/chpid.h> |
1da177e4 LT |
20 | |
21 | #include "cio.h" | |
22 | #include "cio_debug.h" | |
23 | #include "css.h" | |
24 | #include "chsc.h" | |
25 | #include "device.h" | |
e6b6e10a | 26 | #include "chp.h" |
1da177e4 | 27 | |
b2ffd8e9 CH |
28 | /** |
29 | * ccw_device_set_options_mask() - set some options and unset the rest | |
30 | * @cdev: device for which the options are to be set | |
31 | * @flags: options to be set | |
32 | * | |
33 | * All flags specified in @flags are set, all flags not specified in @flags | |
34 | * are cleared. | |
35 | * Returns: | |
36 | * %0 on success, -%EINVAL on an invalid flag combination. | |
37 | */ | |
4dd3cc5c | 38 | int ccw_device_set_options_mask(struct ccw_device *cdev, unsigned long flags) |
1da177e4 LT |
39 | { |
40 | /* | |
41 | * The flag usage is mutal exclusive ... | |
42 | */ | |
43 | if ((flags & CCWDEV_EARLY_NOTIFICATION) && | |
44 | (flags & CCWDEV_REPORT_ALL)) | |
45 | return -EINVAL; | |
46 | cdev->private->options.fast = (flags & CCWDEV_EARLY_NOTIFICATION) != 0; | |
47 | cdev->private->options.repall = (flags & CCWDEV_REPORT_ALL) != 0; | |
48 | cdev->private->options.pgroup = (flags & CCWDEV_DO_PATHGROUP) != 0; | |
49 | cdev->private->options.force = (flags & CCWDEV_ALLOW_FORCE) != 0; | |
50 | return 0; | |
51 | } | |
52 | ||
b2ffd8e9 CH |
53 | /** |
54 | * ccw_device_set_options() - set some options | |
55 | * @cdev: device for which the options are to be set | |
56 | * @flags: options to be set | |
57 | * | |
58 | * All flags specified in @flags are set, the remainder is left untouched. | |
59 | * Returns: | |
60 | * %0 on success, -%EINVAL if an invalid flag combination would ensue. | |
61 | */ | |
4dd3cc5c CH |
62 | int ccw_device_set_options(struct ccw_device *cdev, unsigned long flags) |
63 | { | |
64 | /* | |
65 | * The flag usage is mutal exclusive ... | |
66 | */ | |
67 | if (((flags & CCWDEV_EARLY_NOTIFICATION) && | |
68 | (flags & CCWDEV_REPORT_ALL)) || | |
69 | ((flags & CCWDEV_EARLY_NOTIFICATION) && | |
70 | cdev->private->options.repall) || | |
71 | ((flags & CCWDEV_REPORT_ALL) && | |
72 | cdev->private->options.fast)) | |
73 | return -EINVAL; | |
74 | cdev->private->options.fast |= (flags & CCWDEV_EARLY_NOTIFICATION) != 0; | |
75 | cdev->private->options.repall |= (flags & CCWDEV_REPORT_ALL) != 0; | |
76 | cdev->private->options.pgroup |= (flags & CCWDEV_DO_PATHGROUP) != 0; | |
77 | cdev->private->options.force |= (flags & CCWDEV_ALLOW_FORCE) != 0; | |
78 | return 0; | |
79 | } | |
80 | ||
b2ffd8e9 CH |
81 | /** |
82 | * ccw_device_clear_options() - clear some options | |
83 | * @cdev: device for which the options are to be cleared | |
84 | * @flags: options to be cleared | |
85 | * | |
86 | * All flags specified in @flags are cleared, the remainder is left untouched. | |
87 | */ | |
4dd3cc5c CH |
88 | void ccw_device_clear_options(struct ccw_device *cdev, unsigned long flags) |
89 | { | |
90 | cdev->private->options.fast &= (flags & CCWDEV_EARLY_NOTIFICATION) == 0; | |
91 | cdev->private->options.repall &= (flags & CCWDEV_REPORT_ALL) == 0; | |
92 | cdev->private->options.pgroup &= (flags & CCWDEV_DO_PATHGROUP) == 0; | |
93 | cdev->private->options.force &= (flags & CCWDEV_ALLOW_FORCE) == 0; | |
94 | } | |
95 | ||
b2ffd8e9 CH |
96 | /** |
97 | * ccw_device_clear() - terminate I/O request processing | |
98 | * @cdev: target ccw device | |
99 | * @intparm: interruption parameter; value is only used if no I/O is | |
100 | * outstanding, otherwise the intparm associated with the I/O request | |
101 | * is returned | |
102 | * | |
103 | * ccw_device_clear() calls csch on @cdev's subchannel. | |
104 | * Returns: | |
105 | * %0 on success, | |
106 | * -%ENODEV on device not operational, | |
107 | * -%EINVAL on invalid device state. | |
108 | * Context: | |
109 | * Interrupts disabled, ccw device lock held | |
110 | */ | |
111 | int ccw_device_clear(struct ccw_device *cdev, unsigned long intparm) | |
1da177e4 LT |
112 | { |
113 | struct subchannel *sch; | |
114 | int ret; | |
115 | ||
116 | if (!cdev) | |
117 | return -ENODEV; | |
118 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
119 | return -ENODEV; | |
120 | if (cdev->private->state != DEV_STATE_ONLINE && | |
1da177e4 LT |
121 | cdev->private->state != DEV_STATE_W4SENSE) |
122 | return -EINVAL; | |
123 | sch = to_subchannel(cdev->dev.parent); | |
124 | if (!sch) | |
125 | return -ENODEV; | |
126 | ret = cio_clear(sch); | |
127 | if (ret == 0) | |
128 | cdev->private->intparm = intparm; | |
129 | return ret; | |
130 | } | |
131 | ||
b2ffd8e9 CH |
132 | /** |
133 | * ccw_device_start_key() - start a s390 channel program with key | |
134 | * @cdev: target ccw device | |
135 | * @cpa: logical start address of channel program | |
136 | * @intparm: user specific interruption parameter; will be presented back to | |
137 | * @cdev's interrupt handler. Allows a device driver to associate | |
138 | * the interrupt with a particular I/O request. | |
139 | * @lpm: defines the channel path to be used for a specific I/O request. A | |
140 | * value of 0 will make cio use the opm. | |
141 | * @key: storage key to be used for the I/O | |
142 | * @flags: additional flags; defines the action to be performed for I/O | |
143 | * processing. | |
144 | * | |
145 | * Start a S/390 channel program. When the interrupt arrives, the | |
146 | * IRQ handler is called, either immediately, delayed (dev-end missing, | |
147 | * or sense required) or never (no IRQ handler registered). | |
148 | * Returns: | |
149 | * %0, if the operation was successful; | |
150 | * -%EBUSY, if the device is busy, or status pending; | |
151 | * -%EACCES, if no path specified in @lpm is operational; | |
152 | * -%ENODEV, if the device is not operational. | |
153 | * Context: | |
154 | * Interrupts disabled, ccw device lock held | |
155 | */ | |
156 | int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa, | |
157 | unsigned long intparm, __u8 lpm, __u8 key, | |
158 | unsigned long flags) | |
1da177e4 LT |
159 | { |
160 | struct subchannel *sch; | |
161 | int ret; | |
162 | ||
163 | if (!cdev) | |
164 | return -ENODEV; | |
165 | sch = to_subchannel(cdev->dev.parent); | |
166 | if (!sch) | |
167 | return -ENODEV; | |
168 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
169 | return -ENODEV; | |
b4f7b1ee CH |
170 | if (cdev->private->state == DEV_STATE_VERIFY || |
171 | cdev->private->state == DEV_STATE_CLEAR_VERIFY) { | |
1da177e4 LT |
172 | /* Remember to fake irb when finished. */ |
173 | if (!cdev->private->flags.fake_irb) { | |
174 | cdev->private->flags.fake_irb = 1; | |
175 | cdev->private->intparm = intparm; | |
176 | return 0; | |
177 | } else | |
178 | /* There's already a fake I/O around. */ | |
179 | return -EBUSY; | |
180 | } | |
181 | if (cdev->private->state != DEV_STATE_ONLINE || | |
182 | ((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) && | |
183 | !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) || | |
184 | cdev->private->flags.doverify) | |
185 | return -EBUSY; | |
186 | ret = cio_set_options (sch, flags); | |
187 | if (ret) | |
188 | return ret; | |
e0e32c8e PO |
189 | /* Adjust requested path mask to excluded varied off paths. */ |
190 | if (lpm) { | |
191 | lpm &= sch->opm; | |
192 | if (lpm == 0) | |
193 | return -EACCES; | |
194 | } | |
1da177e4 | 195 | ret = cio_start_key (sch, cpa, lpm, key); |
fe6173d9 CH |
196 | switch (ret) { |
197 | case 0: | |
1da177e4 | 198 | cdev->private->intparm = intparm; |
fe6173d9 CH |
199 | break; |
200 | case -EACCES: | |
201 | case -ENODEV: | |
202 | dev_fsm_event(cdev, DEV_EVENT_VERIFY); | |
203 | break; | |
204 | } | |
1da177e4 LT |
205 | return ret; |
206 | } | |
207 | ||
b2ffd8e9 CH |
208 | /** |
209 | * ccw_device_start_timeout_key() - start a s390 channel program with timeout and key | |
210 | * @cdev: target ccw device | |
211 | * @cpa: logical start address of channel program | |
212 | * @intparm: user specific interruption parameter; will be presented back to | |
213 | * @cdev's interrupt handler. Allows a device driver to associate | |
214 | * the interrupt with a particular I/O request. | |
215 | * @lpm: defines the channel path to be used for a specific I/O request. A | |
216 | * value of 0 will make cio use the opm. | |
217 | * @key: storage key to be used for the I/O | |
218 | * @flags: additional flags; defines the action to be performed for I/O | |
219 | * processing. | |
220 | * @expires: timeout value in jiffies | |
221 | * | |
222 | * Start a S/390 channel program. When the interrupt arrives, the | |
223 | * IRQ handler is called, either immediately, delayed (dev-end missing, | |
224 | * or sense required) or never (no IRQ handler registered). | |
225 | * This function notifies the device driver if the channel program has not | |
226 | * completed during the time specified by @expires. If a timeout occurs, the | |
227 | * channel program is terminated via xsch, hsch or csch, and the device's | |
228 | * interrupt handler will be called with an irb containing ERR_PTR(-%ETIMEDOUT). | |
229 | * Returns: | |
230 | * %0, if the operation was successful; | |
231 | * -%EBUSY, if the device is busy, or status pending; | |
232 | * -%EACCES, if no path specified in @lpm is operational; | |
233 | * -%ENODEV, if the device is not operational. | |
234 | * Context: | |
235 | * Interrupts disabled, ccw device lock held | |
236 | */ | |
237 | int ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa, | |
238 | unsigned long intparm, __u8 lpm, __u8 key, | |
239 | unsigned long flags, int expires) | |
1da177e4 LT |
240 | { |
241 | int ret; | |
242 | ||
243 | if (!cdev) | |
244 | return -ENODEV; | |
245 | ccw_device_set_timeout(cdev, expires); | |
246 | ret = ccw_device_start_key(cdev, cpa, intparm, lpm, key, flags); | |
247 | if (ret != 0) | |
248 | ccw_device_set_timeout(cdev, 0); | |
249 | return ret; | |
250 | } | |
251 | ||
b2ffd8e9 CH |
252 | /** |
253 | * ccw_device_start() - start a s390 channel program | |
254 | * @cdev: target ccw device | |
255 | * @cpa: logical start address of channel program | |
256 | * @intparm: user specific interruption parameter; will be presented back to | |
257 | * @cdev's interrupt handler. Allows a device driver to associate | |
258 | * the interrupt with a particular I/O request. | |
259 | * @lpm: defines the channel path to be used for a specific I/O request. A | |
260 | * value of 0 will make cio use the opm. | |
261 | * @flags: additional flags; defines the action to be performed for I/O | |
262 | * processing. | |
263 | * | |
264 | * Start a S/390 channel program. When the interrupt arrives, the | |
265 | * IRQ handler is called, either immediately, delayed (dev-end missing, | |
266 | * or sense required) or never (no IRQ handler registered). | |
267 | * Returns: | |
268 | * %0, if the operation was successful; | |
269 | * -%EBUSY, if the device is busy, or status pending; | |
270 | * -%EACCES, if no path specified in @lpm is operational; | |
271 | * -%ENODEV, if the device is not operational. | |
272 | * Context: | |
273 | * Interrupts disabled, ccw device lock held | |
274 | */ | |
275 | int ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa, | |
276 | unsigned long intparm, __u8 lpm, unsigned long flags) | |
1da177e4 LT |
277 | { |
278 | return ccw_device_start_key(cdev, cpa, intparm, lpm, | |
0b642ede | 279 | PAGE_DEFAULT_KEY, flags); |
1da177e4 LT |
280 | } |
281 | ||
b2ffd8e9 CH |
282 | /** |
283 | * ccw_device_start_timeout() - start a s390 channel program with timeout | |
284 | * @cdev: target ccw device | |
285 | * @cpa: logical start address of channel program | |
286 | * @intparm: user specific interruption parameter; will be presented back to | |
287 | * @cdev's interrupt handler. Allows a device driver to associate | |
288 | * the interrupt with a particular I/O request. | |
289 | * @lpm: defines the channel path to be used for a specific I/O request. A | |
290 | * value of 0 will make cio use the opm. | |
291 | * @flags: additional flags; defines the action to be performed for I/O | |
292 | * processing. | |
293 | * @expires: timeout value in jiffies | |
294 | * | |
295 | * Start a S/390 channel program. When the interrupt arrives, the | |
296 | * IRQ handler is called, either immediately, delayed (dev-end missing, | |
297 | * or sense required) or never (no IRQ handler registered). | |
298 | * This function notifies the device driver if the channel program has not | |
299 | * completed during the time specified by @expires. If a timeout occurs, the | |
300 | * channel program is terminated via xsch, hsch or csch, and the device's | |
301 | * interrupt handler will be called with an irb containing ERR_PTR(-%ETIMEDOUT). | |
302 | * Returns: | |
303 | * %0, if the operation was successful; | |
304 | * -%EBUSY, if the device is busy, or status pending; | |
305 | * -%EACCES, if no path specified in @lpm is operational; | |
306 | * -%ENODEV, if the device is not operational. | |
307 | * Context: | |
308 | * Interrupts disabled, ccw device lock held | |
309 | */ | |
310 | int ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa, | |
311 | unsigned long intparm, __u8 lpm, | |
312 | unsigned long flags, int expires) | |
1da177e4 LT |
313 | { |
314 | return ccw_device_start_timeout_key(cdev, cpa, intparm, lpm, | |
0b642ede | 315 | PAGE_DEFAULT_KEY, flags, |
1da177e4 LT |
316 | expires); |
317 | } | |
318 | ||
319 | ||
b2ffd8e9 CH |
320 | /** |
321 | * ccw_device_halt() - halt I/O request processing | |
322 | * @cdev: target ccw device | |
323 | * @intparm: interruption parameter; value is only used if no I/O is | |
324 | * outstanding, otherwise the intparm associated with the I/O request | |
325 | * is returned | |
326 | * | |
327 | * ccw_device_halt() calls hsch on @cdev's subchannel. | |
328 | * Returns: | |
329 | * %0 on success, | |
330 | * -%ENODEV on device not operational, | |
331 | * -%EINVAL on invalid device state, | |
332 | * -%EBUSY on device busy or interrupt pending. | |
333 | * Context: | |
334 | * Interrupts disabled, ccw device lock held | |
335 | */ | |
336 | int ccw_device_halt(struct ccw_device *cdev, unsigned long intparm) | |
1da177e4 LT |
337 | { |
338 | struct subchannel *sch; | |
339 | int ret; | |
340 | ||
341 | if (!cdev) | |
342 | return -ENODEV; | |
343 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
344 | return -ENODEV; | |
345 | if (cdev->private->state != DEV_STATE_ONLINE && | |
1da177e4 LT |
346 | cdev->private->state != DEV_STATE_W4SENSE) |
347 | return -EINVAL; | |
348 | sch = to_subchannel(cdev->dev.parent); | |
349 | if (!sch) | |
350 | return -ENODEV; | |
351 | ret = cio_halt(sch); | |
352 | if (ret == 0) | |
353 | cdev->private->intparm = intparm; | |
354 | return ret; | |
355 | } | |
356 | ||
b2ffd8e9 CH |
357 | /** |
358 | * ccw_device_resume() - resume channel program execution | |
359 | * @cdev: target ccw device | |
360 | * | |
361 | * ccw_device_resume() calls rsch on @cdev's subchannel. | |
362 | * Returns: | |
363 | * %0 on success, | |
364 | * -%ENODEV on device not operational, | |
365 | * -%EINVAL on invalid device state, | |
366 | * -%EBUSY on device busy or interrupt pending. | |
367 | * Context: | |
368 | * Interrupts disabled, ccw device lock held | |
369 | */ | |
370 | int ccw_device_resume(struct ccw_device *cdev) | |
1da177e4 LT |
371 | { |
372 | struct subchannel *sch; | |
373 | ||
374 | if (!cdev) | |
375 | return -ENODEV; | |
376 | sch = to_subchannel(cdev->dev.parent); | |
377 | if (!sch) | |
378 | return -ENODEV; | |
379 | if (cdev->private->state == DEV_STATE_NOT_OPER) | |
380 | return -ENODEV; | |
381 | if (cdev->private->state != DEV_STATE_ONLINE || | |
382 | !(sch->schib.scsw.actl & SCSW_ACTL_SUSPENDED)) | |
383 | return -EINVAL; | |
384 | return cio_resume(sch); | |
385 | } | |
386 | ||
387 | /* | |
388 | * Pass interrupt to device driver. | |
389 | */ | |
390 | int | |
391 | ccw_device_call_handler(struct ccw_device *cdev) | |
392 | { | |
393 | struct subchannel *sch; | |
394 | unsigned int stctl; | |
395 | int ending_status; | |
396 | ||
397 | sch = to_subchannel(cdev->dev.parent); | |
398 | ||
399 | /* | |
400 | * we allow for the device action handler if . | |
401 | * - we received ending status | |
402 | * - the action handler requested to see all interrupts | |
403 | * - we received an intermediate status | |
404 | * - fast notification was requested (primary status) | |
405 | * - unsolicited interrupts | |
406 | */ | |
407 | stctl = cdev->private->irb.scsw.stctl; | |
408 | ending_status = (stctl & SCSW_STCTL_SEC_STATUS) || | |
409 | (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) || | |
410 | (stctl == SCSW_STCTL_STATUS_PEND); | |
411 | if (!ending_status && | |
412 | !cdev->private->options.repall && | |
413 | !(stctl & SCSW_STCTL_INTER_STATUS) && | |
414 | !(cdev->private->options.fast && | |
415 | (stctl & SCSW_STCTL_PRIM_STATUS))) | |
416 | return 0; | |
417 | ||
f1ee3281 CH |
418 | /* Clear pending timers for device driver initiated I/O. */ |
419 | if (ending_status) | |
420 | ccw_device_set_timeout(cdev, 0); | |
1da177e4 LT |
421 | /* |
422 | * Now we are ready to call the device driver interrupt handler. | |
423 | */ | |
424 | if (cdev->handler) | |
425 | cdev->handler(cdev, cdev->private->intparm, | |
426 | &cdev->private->irb); | |
427 | ||
428 | /* | |
429 | * Clear the old and now useless interrupt response block. | |
430 | */ | |
431 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
432 | ||
433 | return 1; | |
434 | } | |
435 | ||
b2ffd8e9 CH |
436 | /** |
437 | * ccw_device_get_ciw() - Search for CIW command in extended sense data. | |
438 | * @cdev: ccw device to inspect | |
439 | * @ct: command type to look for | |
440 | * | |
441 | * During SenseID, command information words (CIWs) describing special | |
442 | * commands available to the device may have been stored in the extended | |
443 | * sense data. This function searches for CIWs of a specified command | |
444 | * type in the extended sense data. | |
445 | * Returns: | |
446 | * %NULL if no extended sense data has been stored or if no CIW of the | |
447 | * specified command type could be found, | |
448 | * else a pointer to the CIW of the specified command type. | |
1da177e4 | 449 | */ |
b2ffd8e9 | 450 | struct ciw *ccw_device_get_ciw(struct ccw_device *cdev, __u32 ct) |
1da177e4 LT |
451 | { |
452 | int ciw_cnt; | |
453 | ||
454 | if (cdev->private->flags.esid == 0) | |
455 | return NULL; | |
456 | for (ciw_cnt = 0; ciw_cnt < MAX_CIWS; ciw_cnt++) | |
457 | if (cdev->private->senseid.ciw[ciw_cnt].ct == ct) | |
458 | return cdev->private->senseid.ciw + ciw_cnt; | |
459 | return NULL; | |
460 | } | |
461 | ||
b2ffd8e9 CH |
462 | /** |
463 | * ccw_device_get_path_mask() - get currently available paths | |
464 | * @cdev: ccw device to be queried | |
465 | * Returns: | |
466 | * %0 if no subchannel for the device is available, | |
467 | * else the mask of currently available paths for the ccw device's subchannel. | |
468 | */ | |
469 | __u8 ccw_device_get_path_mask(struct ccw_device *cdev) | |
1da177e4 LT |
470 | { |
471 | struct subchannel *sch; | |
472 | ||
473 | sch = to_subchannel(cdev->dev.parent); | |
474 | if (!sch) | |
475 | return 0; | |
476 | else | |
28bdc6f6 | 477 | return sch->lpm; |
1da177e4 LT |
478 | } |
479 | ||
1da177e4 LT |
480 | /* |
481 | * Try to break the lock on a boxed device. | |
482 | */ | |
483 | int | |
484 | ccw_device_stlck(struct ccw_device *cdev) | |
485 | { | |
486 | void *buf, *buf2; | |
487 | unsigned long flags; | |
488 | struct subchannel *sch; | |
489 | int ret; | |
490 | ||
491 | if (!cdev) | |
492 | return -ENODEV; | |
493 | ||
494 | if (cdev->drv && !cdev->private->options.force) | |
495 | return -EINVAL; | |
496 | ||
497 | sch = to_subchannel(cdev->dev.parent); | |
498 | ||
499 | CIO_TRACE_EVENT(2, "stl lock"); | |
500 | CIO_TRACE_EVENT(2, cdev->dev.bus_id); | |
501 | ||
502 | buf = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL); | |
503 | if (!buf) | |
504 | return -ENOMEM; | |
505 | buf2 = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL); | |
506 | if (!buf2) { | |
507 | kfree(buf); | |
508 | return -ENOMEM; | |
509 | } | |
2ec22984 | 510 | spin_lock_irqsave(sch->lock, flags); |
b279a4f5 | 511 | ret = cio_enable_subchannel(sch, 3, (u32)(addr_t)sch); |
1da177e4 LT |
512 | if (ret) |
513 | goto out_unlock; | |
514 | /* | |
515 | * Setup ccw. We chain an unconditional reserve and a release so we | |
516 | * only break the lock. | |
517 | */ | |
518 | cdev->private->iccws[0].cmd_code = CCW_CMD_STLCK; | |
519 | cdev->private->iccws[0].cda = (__u32) __pa(buf); | |
520 | cdev->private->iccws[0].count = 32; | |
521 | cdev->private->iccws[0].flags = CCW_FLAG_CC; | |
522 | cdev->private->iccws[1].cmd_code = CCW_CMD_RELEASE; | |
523 | cdev->private->iccws[1].cda = (__u32) __pa(buf2); | |
524 | cdev->private->iccws[1].count = 32; | |
525 | cdev->private->iccws[1].flags = 0; | |
526 | ret = cio_start(sch, cdev->private->iccws, 0); | |
527 | if (ret) { | |
528 | cio_disable_subchannel(sch); //FIXME: return code? | |
529 | goto out_unlock; | |
530 | } | |
531 | cdev->private->irb.scsw.actl |= SCSW_ACTL_START_PEND; | |
2ec22984 | 532 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 | 533 | wait_event(cdev->private->wait_q, cdev->private->irb.scsw.actl == 0); |
2ec22984 | 534 | spin_lock_irqsave(sch->lock, flags); |
1da177e4 LT |
535 | cio_disable_subchannel(sch); //FIXME: return code? |
536 | if ((cdev->private->irb.scsw.dstat != | |
537 | (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) || | |
538 | (cdev->private->irb.scsw.cstat != 0)) | |
539 | ret = -EIO; | |
540 | /* Clear irb. */ | |
541 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
542 | out_unlock: | |
17fd682e JJ |
543 | kfree(buf); |
544 | kfree(buf2); | |
2ec22984 | 545 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
546 | return ret; |
547 | } | |
548 | ||
b2ffd8e9 | 549 | void *ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_no) |
1da177e4 LT |
550 | { |
551 | struct subchannel *sch; | |
e6b6e10a | 552 | struct chp_id chpid; |
1da177e4 LT |
553 | |
554 | sch = to_subchannel(cdev->dev.parent); | |
e6b6e10a PO |
555 | chp_id_init(&chpid); |
556 | chpid.id = sch->schib.pmcw.chpid[chp_no]; | |
557 | return chp_get_chp_desc(chpid); | |
1da177e4 LT |
558 | } |
559 | ||
9a92fe48 CH |
560 | /** |
561 | * ccw_device_get_id - obtain a ccw device id | |
562 | * @cdev: device to obtain the id for | |
563 | * @dev_id: where to fill in the values | |
564 | */ | |
565 | void ccw_device_get_id(struct ccw_device *cdev, struct ccw_dev_id *dev_id) | |
566 | { | |
567 | *dev_id = cdev->private->dev_id; | |
568 | } | |
569 | EXPORT_SYMBOL(ccw_device_get_id); | |
570 | ||
1da177e4 LT |
571 | // FIXME: these have to go: |
572 | ||
573 | int | |
574 | _ccw_device_get_subchannel_number(struct ccw_device *cdev) | |
575 | { | |
78964268 | 576 | return cdev->private->schid.sch_no; |
1da177e4 LT |
577 | } |
578 | ||
1da177e4 LT |
579 | |
580 | MODULE_LICENSE("GPL"); | |
4dd3cc5c | 581 | EXPORT_SYMBOL(ccw_device_set_options_mask); |
1da177e4 | 582 | EXPORT_SYMBOL(ccw_device_set_options); |
4dd3cc5c | 583 | EXPORT_SYMBOL(ccw_device_clear_options); |
1da177e4 LT |
584 | EXPORT_SYMBOL(ccw_device_clear); |
585 | EXPORT_SYMBOL(ccw_device_halt); | |
586 | EXPORT_SYMBOL(ccw_device_resume); | |
587 | EXPORT_SYMBOL(ccw_device_start_timeout); | |
588 | EXPORT_SYMBOL(ccw_device_start); | |
589 | EXPORT_SYMBOL(ccw_device_start_timeout_key); | |
590 | EXPORT_SYMBOL(ccw_device_start_key); | |
591 | EXPORT_SYMBOL(ccw_device_get_ciw); | |
592 | EXPORT_SYMBOL(ccw_device_get_path_mask); | |
1da177e4 | 593 | EXPORT_SYMBOL(_ccw_device_get_subchannel_number); |
1da177e4 | 594 | EXPORT_SYMBOL_GPL(ccw_device_get_chp_desc); |