Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
823d494a | 2 | * Copyright IBM Corp. 2002, 2009 |
1da177e4 | 3 | * |
823d494a SO |
4 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) |
5 | * Cornelia Huck (cornelia.huck@de.ibm.com) | |
1da177e4 | 6 | */ |
1da177e4 LT |
7 | #include <linux/module.h> |
8 | #include <linux/init.h> | |
9 | #include <linux/errno.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/list.h> | |
12 | #include <linux/device.h> | |
13 | #include <linux/delay.h> | |
14 | ||
15 | #include <asm/ccwdev.h> | |
16 | #include <asm/idals.h> | |
e5854a58 | 17 | #include <asm/chpid.h> |
83262d63 | 18 | #include <asm/fcx.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" | |
e6b6e10a | 25 | #include "chp.h" |
1da177e4 | 26 | |
b2ffd8e9 CH |
27 | /** |
28 | * ccw_device_set_options_mask() - set some options and unset the rest | |
29 | * @cdev: device for which the options are to be set | |
30 | * @flags: options to be set | |
31 | * | |
32 | * All flags specified in @flags are set, all flags not specified in @flags | |
33 | * are cleared. | |
34 | * Returns: | |
35 | * %0 on success, -%EINVAL on an invalid flag combination. | |
36 | */ | |
4dd3cc5c | 37 | int ccw_device_set_options_mask(struct ccw_device *cdev, unsigned long flags) |
1da177e4 LT |
38 | { |
39 | /* | |
40 | * The flag usage is mutal exclusive ... | |
41 | */ | |
42 | if ((flags & CCWDEV_EARLY_NOTIFICATION) && | |
43 | (flags & CCWDEV_REPORT_ALL)) | |
44 | return -EINVAL; | |
45 | cdev->private->options.fast = (flags & CCWDEV_EARLY_NOTIFICATION) != 0; | |
46 | cdev->private->options.repall = (flags & CCWDEV_REPORT_ALL) != 0; | |
47 | cdev->private->options.pgroup = (flags & CCWDEV_DO_PATHGROUP) != 0; | |
48 | cdev->private->options.force = (flags & CCWDEV_ALLOW_FORCE) != 0; | |
49 | return 0; | |
50 | } | |
51 | ||
b2ffd8e9 CH |
52 | /** |
53 | * ccw_device_set_options() - set some options | |
54 | * @cdev: device for which the options are to be set | |
55 | * @flags: options to be set | |
56 | * | |
57 | * All flags specified in @flags are set, the remainder is left untouched. | |
58 | * Returns: | |
59 | * %0 on success, -%EINVAL if an invalid flag combination would ensue. | |
60 | */ | |
4dd3cc5c CH |
61 | int ccw_device_set_options(struct ccw_device *cdev, unsigned long flags) |
62 | { | |
63 | /* | |
64 | * The flag usage is mutal exclusive ... | |
65 | */ | |
66 | if (((flags & CCWDEV_EARLY_NOTIFICATION) && | |
67 | (flags & CCWDEV_REPORT_ALL)) || | |
68 | ((flags & CCWDEV_EARLY_NOTIFICATION) && | |
69 | cdev->private->options.repall) || | |
70 | ((flags & CCWDEV_REPORT_ALL) && | |
71 | cdev->private->options.fast)) | |
72 | return -EINVAL; | |
73 | cdev->private->options.fast |= (flags & CCWDEV_EARLY_NOTIFICATION) != 0; | |
74 | cdev->private->options.repall |= (flags & CCWDEV_REPORT_ALL) != 0; | |
75 | cdev->private->options.pgroup |= (flags & CCWDEV_DO_PATHGROUP) != 0; | |
76 | cdev->private->options.force |= (flags & CCWDEV_ALLOW_FORCE) != 0; | |
77 | return 0; | |
78 | } | |
79 | ||
b2ffd8e9 CH |
80 | /** |
81 | * ccw_device_clear_options() - clear some options | |
82 | * @cdev: device for which the options are to be cleared | |
83 | * @flags: options to be cleared | |
84 | * | |
85 | * All flags specified in @flags are cleared, the remainder is left untouched. | |
86 | */ | |
4dd3cc5c CH |
87 | void ccw_device_clear_options(struct ccw_device *cdev, unsigned long flags) |
88 | { | |
89 | cdev->private->options.fast &= (flags & CCWDEV_EARLY_NOTIFICATION) == 0; | |
90 | cdev->private->options.repall &= (flags & CCWDEV_REPORT_ALL) == 0; | |
91 | cdev->private->options.pgroup &= (flags & CCWDEV_DO_PATHGROUP) == 0; | |
92 | cdev->private->options.force &= (flags & CCWDEV_ALLOW_FORCE) == 0; | |
93 | } | |
94 | ||
b2ffd8e9 CH |
95 | /** |
96 | * ccw_device_clear() - terminate I/O request processing | |
97 | * @cdev: target ccw device | |
98 | * @intparm: interruption parameter; value is only used if no I/O is | |
99 | * outstanding, otherwise the intparm associated with the I/O request | |
100 | * is returned | |
101 | * | |
102 | * ccw_device_clear() calls csch on @cdev's subchannel. | |
103 | * Returns: | |
104 | * %0 on success, | |
105 | * -%ENODEV on device not operational, | |
106 | * -%EINVAL on invalid device state. | |
107 | * Context: | |
108 | * Interrupts disabled, ccw device lock held | |
109 | */ | |
110 | int ccw_device_clear(struct ccw_device *cdev, unsigned long intparm) | |
1da177e4 LT |
111 | { |
112 | struct subchannel *sch; | |
113 | int ret; | |
114 | ||
e45efa99 | 115 | if (!cdev || !cdev->dev.parent) |
1da177e4 | 116 | return -ENODEV; |
823d494a SO |
117 | sch = to_subchannel(cdev->dev.parent); |
118 | if (!sch->schib.pmcw.ena) | |
119 | return -EINVAL; | |
1da177e4 LT |
120 | if (cdev->private->state == DEV_STATE_NOT_OPER) |
121 | return -ENODEV; | |
122 | if (cdev->private->state != DEV_STATE_ONLINE && | |
1da177e4 LT |
123 | cdev->private->state != DEV_STATE_W4SENSE) |
124 | return -EINVAL; | |
823d494a | 125 | |
1da177e4 LT |
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 | ||
e45efa99 | 163 | if (!cdev || !cdev->dev.parent) |
1da177e4 LT |
164 | return -ENODEV; |
165 | sch = to_subchannel(cdev->dev.parent); | |
823d494a SO |
166 | if (!sch->schib.pmcw.ena) |
167 | return -EINVAL; | |
1da177e4 LT |
168 | if (cdev->private->state == DEV_STATE_NOT_OPER) |
169 | return -ENODEV; | |
4257aaec | 170 | if (cdev->private->state == DEV_STATE_VERIFY) { |
1da177e4 LT |
171 | /* Remember to fake irb when finished. */ |
172 | if (!cdev->private->flags.fake_irb) { | |
173 | cdev->private->flags.fake_irb = 1; | |
174 | cdev->private->intparm = intparm; | |
175 | return 0; | |
176 | } else | |
177 | /* There's already a fake I/O around. */ | |
178 | return -EBUSY; | |
179 | } | |
180 | if (cdev->private->state != DEV_STATE_ONLINE || | |
23d805b6 PO |
181 | ((sch->schib.scsw.cmd.stctl & SCSW_STCTL_PRIM_STATUS) && |
182 | !(sch->schib.scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS)) || | |
1da177e4 LT |
183 | cdev->private->flags.doverify) |
184 | return -EBUSY; | |
185 | ret = cio_set_options (sch, flags); | |
186 | if (ret) | |
187 | return ret; | |
e0e32c8e PO |
188 | /* Adjust requested path mask to excluded varied off paths. */ |
189 | if (lpm) { | |
190 | lpm &= sch->opm; | |
191 | if (lpm == 0) | |
192 | return -EACCES; | |
193 | } | |
1da177e4 | 194 | ret = cio_start_key (sch, cpa, lpm, key); |
fe6173d9 CH |
195 | switch (ret) { |
196 | case 0: | |
1da177e4 | 197 | cdev->private->intparm = intparm; |
fe6173d9 CH |
198 | break; |
199 | case -EACCES: | |
200 | case -ENODEV: | |
201 | dev_fsm_event(cdev, DEV_EVENT_VERIFY); | |
202 | break; | |
203 | } | |
1da177e4 LT |
204 | return ret; |
205 | } | |
206 | ||
b2ffd8e9 CH |
207 | /** |
208 | * ccw_device_start_timeout_key() - start a s390 channel program with timeout and key | |
209 | * @cdev: target ccw device | |
210 | * @cpa: logical start address of channel program | |
211 | * @intparm: user specific interruption parameter; will be presented back to | |
212 | * @cdev's interrupt handler. Allows a device driver to associate | |
213 | * the interrupt with a particular I/O request. | |
214 | * @lpm: defines the channel path to be used for a specific I/O request. A | |
215 | * value of 0 will make cio use the opm. | |
216 | * @key: storage key to be used for the I/O | |
217 | * @flags: additional flags; defines the action to be performed for I/O | |
218 | * processing. | |
219 | * @expires: timeout value in jiffies | |
220 | * | |
221 | * Start a S/390 channel program. When the interrupt arrives, the | |
222 | * IRQ handler is called, either immediately, delayed (dev-end missing, | |
223 | * or sense required) or never (no IRQ handler registered). | |
224 | * This function notifies the device driver if the channel program has not | |
225 | * completed during the time specified by @expires. If a timeout occurs, the | |
226 | * channel program is terminated via xsch, hsch or csch, and the device's | |
227 | * interrupt handler will be called with an irb containing ERR_PTR(-%ETIMEDOUT). | |
228 | * Returns: | |
229 | * %0, if the operation was successful; | |
230 | * -%EBUSY, if the device is busy, or status pending; | |
231 | * -%EACCES, if no path specified in @lpm is operational; | |
232 | * -%ENODEV, if the device is not operational. | |
233 | * Context: | |
234 | * Interrupts disabled, ccw device lock held | |
235 | */ | |
236 | int ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa, | |
237 | unsigned long intparm, __u8 lpm, __u8 key, | |
238 | unsigned long flags, int expires) | |
1da177e4 LT |
239 | { |
240 | int ret; | |
241 | ||
242 | if (!cdev) | |
243 | return -ENODEV; | |
244 | ccw_device_set_timeout(cdev, expires); | |
245 | ret = ccw_device_start_key(cdev, cpa, intparm, lpm, key, flags); | |
246 | if (ret != 0) | |
247 | ccw_device_set_timeout(cdev, 0); | |
248 | return ret; | |
249 | } | |
250 | ||
b2ffd8e9 CH |
251 | /** |
252 | * ccw_device_start() - start a s390 channel program | |
253 | * @cdev: target ccw device | |
254 | * @cpa: logical start address of channel program | |
255 | * @intparm: user specific interruption parameter; will be presented back to | |
256 | * @cdev's interrupt handler. Allows a device driver to associate | |
257 | * the interrupt with a particular I/O request. | |
258 | * @lpm: defines the channel path to be used for a specific I/O request. A | |
259 | * value of 0 will make cio use the opm. | |
260 | * @flags: additional flags; defines the action to be performed for I/O | |
261 | * processing. | |
262 | * | |
263 | * Start a S/390 channel program. When the interrupt arrives, the | |
264 | * IRQ handler is called, either immediately, delayed (dev-end missing, | |
265 | * or sense required) or never (no IRQ handler registered). | |
266 | * Returns: | |
267 | * %0, if the operation was successful; | |
268 | * -%EBUSY, if the device is busy, or status pending; | |
269 | * -%EACCES, if no path specified in @lpm is operational; | |
270 | * -%ENODEV, if the device is not operational. | |
271 | * Context: | |
272 | * Interrupts disabled, ccw device lock held | |
273 | */ | |
274 | int ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa, | |
275 | unsigned long intparm, __u8 lpm, unsigned long flags) | |
1da177e4 LT |
276 | { |
277 | return ccw_device_start_key(cdev, cpa, intparm, lpm, | |
0b642ede | 278 | PAGE_DEFAULT_KEY, flags); |
1da177e4 LT |
279 | } |
280 | ||
b2ffd8e9 CH |
281 | /** |
282 | * ccw_device_start_timeout() - start a s390 channel program with timeout | |
283 | * @cdev: target ccw device | |
284 | * @cpa: logical start address of channel program | |
285 | * @intparm: user specific interruption parameter; will be presented back to | |
286 | * @cdev's interrupt handler. Allows a device driver to associate | |
287 | * the interrupt with a particular I/O request. | |
288 | * @lpm: defines the channel path to be used for a specific I/O request. A | |
289 | * value of 0 will make cio use the opm. | |
290 | * @flags: additional flags; defines the action to be performed for I/O | |
291 | * processing. | |
292 | * @expires: timeout value in jiffies | |
293 | * | |
294 | * Start a S/390 channel program. When the interrupt arrives, the | |
295 | * IRQ handler is called, either immediately, delayed (dev-end missing, | |
296 | * or sense required) or never (no IRQ handler registered). | |
297 | * This function notifies the device driver if the channel program has not | |
298 | * completed during the time specified by @expires. If a timeout occurs, the | |
299 | * channel program is terminated via xsch, hsch or csch, and the device's | |
300 | * interrupt handler will be called with an irb containing ERR_PTR(-%ETIMEDOUT). | |
301 | * Returns: | |
302 | * %0, if the operation was successful; | |
303 | * -%EBUSY, if the device is busy, or status pending; | |
304 | * -%EACCES, if no path specified in @lpm is operational; | |
305 | * -%ENODEV, if the device is not operational. | |
306 | * Context: | |
307 | * Interrupts disabled, ccw device lock held | |
308 | */ | |
309 | int ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa, | |
310 | unsigned long intparm, __u8 lpm, | |
311 | unsigned long flags, int expires) | |
1da177e4 LT |
312 | { |
313 | return ccw_device_start_timeout_key(cdev, cpa, intparm, lpm, | |
0b642ede | 314 | PAGE_DEFAULT_KEY, flags, |
1da177e4 LT |
315 | expires); |
316 | } | |
317 | ||
318 | ||
b2ffd8e9 CH |
319 | /** |
320 | * ccw_device_halt() - halt I/O request processing | |
321 | * @cdev: target ccw device | |
322 | * @intparm: interruption parameter; value is only used if no I/O is | |
323 | * outstanding, otherwise the intparm associated with the I/O request | |
324 | * is returned | |
325 | * | |
326 | * ccw_device_halt() calls hsch on @cdev's subchannel. | |
327 | * Returns: | |
328 | * %0 on success, | |
329 | * -%ENODEV on device not operational, | |
330 | * -%EINVAL on invalid device state, | |
331 | * -%EBUSY on device busy or interrupt pending. | |
332 | * Context: | |
333 | * Interrupts disabled, ccw device lock held | |
334 | */ | |
335 | int ccw_device_halt(struct ccw_device *cdev, unsigned long intparm) | |
1da177e4 LT |
336 | { |
337 | struct subchannel *sch; | |
338 | int ret; | |
339 | ||
e45efa99 | 340 | if (!cdev || !cdev->dev.parent) |
1da177e4 | 341 | return -ENODEV; |
823d494a SO |
342 | sch = to_subchannel(cdev->dev.parent); |
343 | if (!sch->schib.pmcw.ena) | |
344 | return -EINVAL; | |
1da177e4 LT |
345 | if (cdev->private->state == DEV_STATE_NOT_OPER) |
346 | return -ENODEV; | |
347 | if (cdev->private->state != DEV_STATE_ONLINE && | |
1da177e4 LT |
348 | cdev->private->state != DEV_STATE_W4SENSE) |
349 | return -EINVAL; | |
823d494a | 350 | |
1da177e4 LT |
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 | ||
e45efa99 | 374 | if (!cdev || !cdev->dev.parent) |
1da177e4 LT |
375 | return -ENODEV; |
376 | sch = to_subchannel(cdev->dev.parent); | |
823d494a SO |
377 | if (!sch->schib.pmcw.ena) |
378 | return -EINVAL; | |
1da177e4 LT |
379 | if (cdev->private->state == DEV_STATE_NOT_OPER) |
380 | return -ENODEV; | |
381 | if (cdev->private->state != DEV_STATE_ONLINE || | |
23d805b6 | 382 | !(sch->schib.scsw.cmd.actl & SCSW_ACTL_SUSPENDED)) |
1da177e4 LT |
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 | */ | |
23d805b6 | 407 | stctl = scsw_stctl(&cdev->private->irb.scsw); |
1da177e4 LT |
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 | ||
e45efa99 | 473 | if (!cdev->dev.parent) |
1da177e4 | 474 | return 0; |
e45efa99 SO |
475 | |
476 | sch = to_subchannel(cdev->dev.parent); | |
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"); | |
2a0217d5 | 500 | CIO_TRACE_EVENT(2, dev_name(&cdev->dev)); |
1da177e4 LT |
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); |
edf22096 | 511 | ret = cio_enable_subchannel(sch, (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 | } | |
23d805b6 | 531 | cdev->private->irb.scsw.cmd.actl |= SCSW_ACTL_START_PEND; |
2ec22984 | 532 | spin_unlock_irqrestore(sch->lock, flags); |
23d805b6 PO |
533 | wait_event(cdev->private->wait_q, |
534 | cdev->private->irb.scsw.cmd.actl == 0); | |
2ec22984 | 535 | spin_lock_irqsave(sch->lock, flags); |
1da177e4 | 536 | cio_disable_subchannel(sch); //FIXME: return code? |
23d805b6 | 537 | if ((cdev->private->irb.scsw.cmd.dstat != |
1da177e4 | 538 | (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) || |
23d805b6 | 539 | (cdev->private->irb.scsw.cmd.cstat != 0)) |
1da177e4 LT |
540 | ret = -EIO; |
541 | /* Clear irb. */ | |
542 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
543 | out_unlock: | |
17fd682e JJ |
544 | kfree(buf); |
545 | kfree(buf2); | |
2ec22984 | 546 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
547 | return ret; |
548 | } | |
549 | ||
b2ffd8e9 | 550 | void *ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_no) |
1da177e4 LT |
551 | { |
552 | struct subchannel *sch; | |
e6b6e10a | 553 | struct chp_id chpid; |
1da177e4 LT |
554 | |
555 | sch = to_subchannel(cdev->dev.parent); | |
e6b6e10a PO |
556 | chp_id_init(&chpid); |
557 | chpid.id = sch->schib.pmcw.chpid[chp_no]; | |
558 | return chp_get_chp_desc(chpid); | |
1da177e4 LT |
559 | } |
560 | ||
9a92fe48 CH |
561 | /** |
562 | * ccw_device_get_id - obtain a ccw device id | |
563 | * @cdev: device to obtain the id for | |
564 | * @dev_id: where to fill in the values | |
565 | */ | |
566 | void ccw_device_get_id(struct ccw_device *cdev, struct ccw_dev_id *dev_id) | |
567 | { | |
568 | *dev_id = cdev->private->dev_id; | |
569 | } | |
570 | EXPORT_SYMBOL(ccw_device_get_id); | |
571 | ||
83262d63 PO |
572 | /** |
573 | * ccw_device_tm_start_key - perform start function | |
574 | * @cdev: ccw device on which to perform the start function | |
575 | * @tcw: transport-command word to be started | |
576 | * @intparm: user defined parameter to be passed to the interrupt handler | |
577 | * @lpm: mask of paths to use | |
578 | * @key: storage key to use for storage access | |
579 | * | |
580 | * Start the tcw on the given ccw device. Return zero on success, non-zero | |
581 | * otherwise. | |
582 | */ | |
583 | int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw, | |
584 | unsigned long intparm, u8 lpm, u8 key) | |
585 | { | |
586 | struct subchannel *sch; | |
587 | int rc; | |
588 | ||
589 | sch = to_subchannel(cdev->dev.parent); | |
823d494a SO |
590 | if (!sch->schib.pmcw.ena) |
591 | return -EINVAL; | |
83262d63 PO |
592 | if (cdev->private->state != DEV_STATE_ONLINE) |
593 | return -EIO; | |
594 | /* Adjust requested path mask to excluded varied off paths. */ | |
595 | if (lpm) { | |
596 | lpm &= sch->opm; | |
597 | if (lpm == 0) | |
598 | return -EACCES; | |
599 | } | |
600 | rc = cio_tm_start_key(sch, tcw, lpm, key); | |
601 | if (rc == 0) | |
602 | cdev->private->intparm = intparm; | |
603 | return rc; | |
604 | } | |
605 | EXPORT_SYMBOL(ccw_device_tm_start_key); | |
606 | ||
607 | /** | |
608 | * ccw_device_tm_start_timeout_key - perform start function | |
609 | * @cdev: ccw device on which to perform the start function | |
610 | * @tcw: transport-command word to be started | |
611 | * @intparm: user defined parameter to be passed to the interrupt handler | |
612 | * @lpm: mask of paths to use | |
613 | * @key: storage key to use for storage access | |
614 | * @expires: time span in jiffies after which to abort request | |
615 | * | |
616 | * Start the tcw on the given ccw device. Return zero on success, non-zero | |
617 | * otherwise. | |
618 | */ | |
619 | int ccw_device_tm_start_timeout_key(struct ccw_device *cdev, struct tcw *tcw, | |
620 | unsigned long intparm, u8 lpm, u8 key, | |
621 | int expires) | |
622 | { | |
623 | int ret; | |
624 | ||
625 | ccw_device_set_timeout(cdev, expires); | |
626 | ret = ccw_device_tm_start_key(cdev, tcw, intparm, lpm, key); | |
627 | if (ret != 0) | |
628 | ccw_device_set_timeout(cdev, 0); | |
629 | return ret; | |
630 | } | |
631 | EXPORT_SYMBOL(ccw_device_tm_start_timeout_key); | |
632 | ||
633 | /** | |
634 | * ccw_device_tm_start - perform start function | |
635 | * @cdev: ccw device on which to perform the start function | |
636 | * @tcw: transport-command word to be started | |
637 | * @intparm: user defined parameter to be passed to the interrupt handler | |
638 | * @lpm: mask of paths to use | |
639 | * | |
640 | * Start the tcw on the given ccw device. Return zero on success, non-zero | |
641 | * otherwise. | |
642 | */ | |
643 | int ccw_device_tm_start(struct ccw_device *cdev, struct tcw *tcw, | |
644 | unsigned long intparm, u8 lpm) | |
645 | { | |
646 | return ccw_device_tm_start_key(cdev, tcw, intparm, lpm, | |
647 | PAGE_DEFAULT_KEY); | |
648 | } | |
649 | EXPORT_SYMBOL(ccw_device_tm_start); | |
650 | ||
651 | /** | |
652 | * ccw_device_tm_start_timeout - perform start function | |
653 | * @cdev: ccw device on which to perform the start function | |
654 | * @tcw: transport-command word to be started | |
655 | * @intparm: user defined parameter to be passed to the interrupt handler | |
656 | * @lpm: mask of paths to use | |
657 | * @expires: time span in jiffies after which to abort request | |
658 | * | |
659 | * Start the tcw on the given ccw device. Return zero on success, non-zero | |
660 | * otherwise. | |
661 | */ | |
662 | int ccw_device_tm_start_timeout(struct ccw_device *cdev, struct tcw *tcw, | |
663 | unsigned long intparm, u8 lpm, int expires) | |
664 | { | |
665 | return ccw_device_tm_start_timeout_key(cdev, tcw, intparm, lpm, | |
666 | PAGE_DEFAULT_KEY, expires); | |
667 | } | |
668 | EXPORT_SYMBOL(ccw_device_tm_start_timeout); | |
669 | ||
670 | /** | |
671 | * ccw_device_tm_intrg - perform interrogate function | |
672 | * @cdev: ccw device on which to perform the interrogate function | |
673 | * | |
674 | * Perform an interrogate function on the given ccw device. Return zero on | |
675 | * success, non-zero otherwise. | |
676 | */ | |
677 | int ccw_device_tm_intrg(struct ccw_device *cdev) | |
678 | { | |
679 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
680 | ||
823d494a SO |
681 | if (!sch->schib.pmcw.ena) |
682 | return -EINVAL; | |
83262d63 PO |
683 | if (cdev->private->state != DEV_STATE_ONLINE) |
684 | return -EIO; | |
685 | if (!scsw_is_tm(&sch->schib.scsw) || | |
7a968f05 | 686 | !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_START_PEND)) |
83262d63 PO |
687 | return -EINVAL; |
688 | return cio_tm_intrg(sch); | |
689 | } | |
690 | EXPORT_SYMBOL(ccw_device_tm_intrg); | |
691 | ||
1da177e4 LT |
692 | // FIXME: these have to go: |
693 | ||
694 | int | |
695 | _ccw_device_get_subchannel_number(struct ccw_device *cdev) | |
696 | { | |
78964268 | 697 | return cdev->private->schid.sch_no; |
1da177e4 LT |
698 | } |
699 | ||
1da177e4 LT |
700 | |
701 | MODULE_LICENSE("GPL"); | |
4dd3cc5c | 702 | EXPORT_SYMBOL(ccw_device_set_options_mask); |
1da177e4 | 703 | EXPORT_SYMBOL(ccw_device_set_options); |
4dd3cc5c | 704 | EXPORT_SYMBOL(ccw_device_clear_options); |
1da177e4 LT |
705 | EXPORT_SYMBOL(ccw_device_clear); |
706 | EXPORT_SYMBOL(ccw_device_halt); | |
707 | EXPORT_SYMBOL(ccw_device_resume); | |
708 | EXPORT_SYMBOL(ccw_device_start_timeout); | |
709 | EXPORT_SYMBOL(ccw_device_start); | |
710 | EXPORT_SYMBOL(ccw_device_start_timeout_key); | |
711 | EXPORT_SYMBOL(ccw_device_start_key); | |
712 | EXPORT_SYMBOL(ccw_device_get_ciw); | |
713 | EXPORT_SYMBOL(ccw_device_get_path_mask); | |
1da177e4 | 714 | EXPORT_SYMBOL(_ccw_device_get_subchannel_number); |
1da177e4 | 715 | EXPORT_SYMBOL_GPL(ccw_device_get_chp_desc); |