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; | |
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 || | |
23d805b6 PO |
182 | ((sch->schib.scsw.cmd.stctl & SCSW_STCTL_PRIM_STATUS) && |
183 | !(sch->schib.scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS)) || | |
1da177e4 LT |
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 | ||
e45efa99 | 341 | if (!cdev || !cdev->dev.parent) |
1da177e4 | 342 | return -ENODEV; |
823d494a SO |
343 | sch = to_subchannel(cdev->dev.parent); |
344 | if (!sch->schib.pmcw.ena) | |
345 | return -EINVAL; | |
1da177e4 LT |
346 | if (cdev->private->state == DEV_STATE_NOT_OPER) |
347 | return -ENODEV; | |
348 | if (cdev->private->state != DEV_STATE_ONLINE && | |
1da177e4 LT |
349 | cdev->private->state != DEV_STATE_W4SENSE) |
350 | return -EINVAL; | |
823d494a | 351 | |
1da177e4 LT |
352 | ret = cio_halt(sch); |
353 | if (ret == 0) | |
354 | cdev->private->intparm = intparm; | |
355 | return ret; | |
356 | } | |
357 | ||
b2ffd8e9 CH |
358 | /** |
359 | * ccw_device_resume() - resume channel program execution | |
360 | * @cdev: target ccw device | |
361 | * | |
362 | * ccw_device_resume() calls rsch on @cdev's subchannel. | |
363 | * Returns: | |
364 | * %0 on success, | |
365 | * -%ENODEV on device not operational, | |
366 | * -%EINVAL on invalid device state, | |
367 | * -%EBUSY on device busy or interrupt pending. | |
368 | * Context: | |
369 | * Interrupts disabled, ccw device lock held | |
370 | */ | |
371 | int ccw_device_resume(struct ccw_device *cdev) | |
1da177e4 LT |
372 | { |
373 | struct subchannel *sch; | |
374 | ||
e45efa99 | 375 | if (!cdev || !cdev->dev.parent) |
1da177e4 LT |
376 | return -ENODEV; |
377 | sch = to_subchannel(cdev->dev.parent); | |
823d494a SO |
378 | if (!sch->schib.pmcw.ena) |
379 | return -EINVAL; | |
1da177e4 LT |
380 | if (cdev->private->state == DEV_STATE_NOT_OPER) |
381 | return -ENODEV; | |
382 | if (cdev->private->state != DEV_STATE_ONLINE || | |
23d805b6 | 383 | !(sch->schib.scsw.cmd.actl & SCSW_ACTL_SUSPENDED)) |
1da177e4 LT |
384 | return -EINVAL; |
385 | return cio_resume(sch); | |
386 | } | |
387 | ||
388 | /* | |
389 | * Pass interrupt to device driver. | |
390 | */ | |
391 | int | |
392 | ccw_device_call_handler(struct ccw_device *cdev) | |
393 | { | |
394 | struct subchannel *sch; | |
395 | unsigned int stctl; | |
396 | int ending_status; | |
397 | ||
398 | sch = to_subchannel(cdev->dev.parent); | |
399 | ||
400 | /* | |
401 | * we allow for the device action handler if . | |
402 | * - we received ending status | |
403 | * - the action handler requested to see all interrupts | |
404 | * - we received an intermediate status | |
405 | * - fast notification was requested (primary status) | |
406 | * - unsolicited interrupts | |
407 | */ | |
23d805b6 | 408 | stctl = scsw_stctl(&cdev->private->irb.scsw); |
1da177e4 LT |
409 | ending_status = (stctl & SCSW_STCTL_SEC_STATUS) || |
410 | (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) || | |
411 | (stctl == SCSW_STCTL_STATUS_PEND); | |
412 | if (!ending_status && | |
413 | !cdev->private->options.repall && | |
414 | !(stctl & SCSW_STCTL_INTER_STATUS) && | |
415 | !(cdev->private->options.fast && | |
416 | (stctl & SCSW_STCTL_PRIM_STATUS))) | |
417 | return 0; | |
418 | ||
f1ee3281 CH |
419 | /* Clear pending timers for device driver initiated I/O. */ |
420 | if (ending_status) | |
421 | ccw_device_set_timeout(cdev, 0); | |
1da177e4 LT |
422 | /* |
423 | * Now we are ready to call the device driver interrupt handler. | |
424 | */ | |
425 | if (cdev->handler) | |
426 | cdev->handler(cdev, cdev->private->intparm, | |
427 | &cdev->private->irb); | |
428 | ||
429 | /* | |
430 | * Clear the old and now useless interrupt response block. | |
431 | */ | |
432 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
433 | ||
434 | return 1; | |
435 | } | |
436 | ||
b2ffd8e9 CH |
437 | /** |
438 | * ccw_device_get_ciw() - Search for CIW command in extended sense data. | |
439 | * @cdev: ccw device to inspect | |
440 | * @ct: command type to look for | |
441 | * | |
442 | * During SenseID, command information words (CIWs) describing special | |
443 | * commands available to the device may have been stored in the extended | |
444 | * sense data. This function searches for CIWs of a specified command | |
445 | * type in the extended sense data. | |
446 | * Returns: | |
447 | * %NULL if no extended sense data has been stored or if no CIW of the | |
448 | * specified command type could be found, | |
449 | * else a pointer to the CIW of the specified command type. | |
1da177e4 | 450 | */ |
b2ffd8e9 | 451 | struct ciw *ccw_device_get_ciw(struct ccw_device *cdev, __u32 ct) |
1da177e4 LT |
452 | { |
453 | int ciw_cnt; | |
454 | ||
455 | if (cdev->private->flags.esid == 0) | |
456 | return NULL; | |
457 | for (ciw_cnt = 0; ciw_cnt < MAX_CIWS; ciw_cnt++) | |
458 | if (cdev->private->senseid.ciw[ciw_cnt].ct == ct) | |
459 | return cdev->private->senseid.ciw + ciw_cnt; | |
460 | return NULL; | |
461 | } | |
462 | ||
b2ffd8e9 CH |
463 | /** |
464 | * ccw_device_get_path_mask() - get currently available paths | |
465 | * @cdev: ccw device to be queried | |
466 | * Returns: | |
467 | * %0 if no subchannel for the device is available, | |
468 | * else the mask of currently available paths for the ccw device's subchannel. | |
469 | */ | |
470 | __u8 ccw_device_get_path_mask(struct ccw_device *cdev) | |
1da177e4 LT |
471 | { |
472 | struct subchannel *sch; | |
473 | ||
e45efa99 | 474 | if (!cdev->dev.parent) |
1da177e4 | 475 | return 0; |
e45efa99 SO |
476 | |
477 | sch = to_subchannel(cdev->dev.parent); | |
478 | return sch->lpm; | |
1da177e4 LT |
479 | } |
480 | ||
1da177e4 LT |
481 | /* |
482 | * Try to break the lock on a boxed device. | |
483 | */ | |
484 | int | |
485 | ccw_device_stlck(struct ccw_device *cdev) | |
486 | { | |
487 | void *buf, *buf2; | |
488 | unsigned long flags; | |
489 | struct subchannel *sch; | |
490 | int ret; | |
491 | ||
492 | if (!cdev) | |
493 | return -ENODEV; | |
494 | ||
495 | if (cdev->drv && !cdev->private->options.force) | |
496 | return -EINVAL; | |
497 | ||
498 | sch = to_subchannel(cdev->dev.parent); | |
499 | ||
500 | CIO_TRACE_EVENT(2, "stl lock"); | |
2a0217d5 | 501 | CIO_TRACE_EVENT(2, dev_name(&cdev->dev)); |
1da177e4 LT |
502 | |
503 | buf = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL); | |
504 | if (!buf) | |
505 | return -ENOMEM; | |
506 | buf2 = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL); | |
507 | if (!buf2) { | |
508 | kfree(buf); | |
509 | return -ENOMEM; | |
510 | } | |
2ec22984 | 511 | spin_lock_irqsave(sch->lock, flags); |
edf22096 | 512 | ret = cio_enable_subchannel(sch, (u32)(addr_t)sch); |
1da177e4 LT |
513 | if (ret) |
514 | goto out_unlock; | |
515 | /* | |
516 | * Setup ccw. We chain an unconditional reserve and a release so we | |
517 | * only break the lock. | |
518 | */ | |
519 | cdev->private->iccws[0].cmd_code = CCW_CMD_STLCK; | |
520 | cdev->private->iccws[0].cda = (__u32) __pa(buf); | |
521 | cdev->private->iccws[0].count = 32; | |
522 | cdev->private->iccws[0].flags = CCW_FLAG_CC; | |
523 | cdev->private->iccws[1].cmd_code = CCW_CMD_RELEASE; | |
524 | cdev->private->iccws[1].cda = (__u32) __pa(buf2); | |
525 | cdev->private->iccws[1].count = 32; | |
526 | cdev->private->iccws[1].flags = 0; | |
527 | ret = cio_start(sch, cdev->private->iccws, 0); | |
528 | if (ret) { | |
529 | cio_disable_subchannel(sch); //FIXME: return code? | |
530 | goto out_unlock; | |
531 | } | |
23d805b6 | 532 | cdev->private->irb.scsw.cmd.actl |= SCSW_ACTL_START_PEND; |
2ec22984 | 533 | spin_unlock_irqrestore(sch->lock, flags); |
23d805b6 PO |
534 | wait_event(cdev->private->wait_q, |
535 | cdev->private->irb.scsw.cmd.actl == 0); | |
2ec22984 | 536 | spin_lock_irqsave(sch->lock, flags); |
1da177e4 | 537 | cio_disable_subchannel(sch); //FIXME: return code? |
23d805b6 | 538 | if ((cdev->private->irb.scsw.cmd.dstat != |
1da177e4 | 539 | (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) || |
23d805b6 | 540 | (cdev->private->irb.scsw.cmd.cstat != 0)) |
1da177e4 LT |
541 | ret = -EIO; |
542 | /* Clear irb. */ | |
543 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
544 | out_unlock: | |
17fd682e JJ |
545 | kfree(buf); |
546 | kfree(buf2); | |
2ec22984 | 547 | spin_unlock_irqrestore(sch->lock, flags); |
1da177e4 LT |
548 | return ret; |
549 | } | |
550 | ||
b2ffd8e9 | 551 | void *ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_no) |
1da177e4 LT |
552 | { |
553 | struct subchannel *sch; | |
e6b6e10a | 554 | struct chp_id chpid; |
1da177e4 LT |
555 | |
556 | sch = to_subchannel(cdev->dev.parent); | |
e6b6e10a PO |
557 | chp_id_init(&chpid); |
558 | chpid.id = sch->schib.pmcw.chpid[chp_no]; | |
559 | return chp_get_chp_desc(chpid); | |
1da177e4 LT |
560 | } |
561 | ||
9a92fe48 CH |
562 | /** |
563 | * ccw_device_get_id - obtain a ccw device id | |
564 | * @cdev: device to obtain the id for | |
565 | * @dev_id: where to fill in the values | |
566 | */ | |
567 | void ccw_device_get_id(struct ccw_device *cdev, struct ccw_dev_id *dev_id) | |
568 | { | |
569 | *dev_id = cdev->private->dev_id; | |
570 | } | |
571 | EXPORT_SYMBOL(ccw_device_get_id); | |
572 | ||
83262d63 PO |
573 | /** |
574 | * ccw_device_tm_start_key - perform start function | |
575 | * @cdev: ccw device on which to perform the start function | |
576 | * @tcw: transport-command word to be started | |
577 | * @intparm: user defined parameter to be passed to the interrupt handler | |
578 | * @lpm: mask of paths to use | |
579 | * @key: storage key to use for storage access | |
580 | * | |
581 | * Start the tcw on the given ccw device. Return zero on success, non-zero | |
582 | * otherwise. | |
583 | */ | |
584 | int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw, | |
585 | unsigned long intparm, u8 lpm, u8 key) | |
586 | { | |
587 | struct subchannel *sch; | |
588 | int rc; | |
589 | ||
590 | sch = to_subchannel(cdev->dev.parent); | |
823d494a SO |
591 | if (!sch->schib.pmcw.ena) |
592 | return -EINVAL; | |
83262d63 PO |
593 | if (cdev->private->state != DEV_STATE_ONLINE) |
594 | return -EIO; | |
595 | /* Adjust requested path mask to excluded varied off paths. */ | |
596 | if (lpm) { | |
597 | lpm &= sch->opm; | |
598 | if (lpm == 0) | |
599 | return -EACCES; | |
600 | } | |
601 | rc = cio_tm_start_key(sch, tcw, lpm, key); | |
602 | if (rc == 0) | |
603 | cdev->private->intparm = intparm; | |
604 | return rc; | |
605 | } | |
606 | EXPORT_SYMBOL(ccw_device_tm_start_key); | |
607 | ||
608 | /** | |
609 | * ccw_device_tm_start_timeout_key - perform start function | |
610 | * @cdev: ccw device on which to perform the start function | |
611 | * @tcw: transport-command word to be started | |
612 | * @intparm: user defined parameter to be passed to the interrupt handler | |
613 | * @lpm: mask of paths to use | |
614 | * @key: storage key to use for storage access | |
615 | * @expires: time span in jiffies after which to abort request | |
616 | * | |
617 | * Start the tcw on the given ccw device. Return zero on success, non-zero | |
618 | * otherwise. | |
619 | */ | |
620 | int ccw_device_tm_start_timeout_key(struct ccw_device *cdev, struct tcw *tcw, | |
621 | unsigned long intparm, u8 lpm, u8 key, | |
622 | int expires) | |
623 | { | |
624 | int ret; | |
625 | ||
626 | ccw_device_set_timeout(cdev, expires); | |
627 | ret = ccw_device_tm_start_key(cdev, tcw, intparm, lpm, key); | |
628 | if (ret != 0) | |
629 | ccw_device_set_timeout(cdev, 0); | |
630 | return ret; | |
631 | } | |
632 | EXPORT_SYMBOL(ccw_device_tm_start_timeout_key); | |
633 | ||
634 | /** | |
635 | * ccw_device_tm_start - perform start function | |
636 | * @cdev: ccw device on which to perform the start function | |
637 | * @tcw: transport-command word to be started | |
638 | * @intparm: user defined parameter to be passed to the interrupt handler | |
639 | * @lpm: mask of paths to use | |
640 | * | |
641 | * Start the tcw on the given ccw device. Return zero on success, non-zero | |
642 | * otherwise. | |
643 | */ | |
644 | int ccw_device_tm_start(struct ccw_device *cdev, struct tcw *tcw, | |
645 | unsigned long intparm, u8 lpm) | |
646 | { | |
647 | return ccw_device_tm_start_key(cdev, tcw, intparm, lpm, | |
648 | PAGE_DEFAULT_KEY); | |
649 | } | |
650 | EXPORT_SYMBOL(ccw_device_tm_start); | |
651 | ||
652 | /** | |
653 | * ccw_device_tm_start_timeout - perform start function | |
654 | * @cdev: ccw device on which to perform the start function | |
655 | * @tcw: transport-command word to be started | |
656 | * @intparm: user defined parameter to be passed to the interrupt handler | |
657 | * @lpm: mask of paths to use | |
658 | * @expires: time span in jiffies after which to abort request | |
659 | * | |
660 | * Start the tcw on the given ccw device. Return zero on success, non-zero | |
661 | * otherwise. | |
662 | */ | |
663 | int ccw_device_tm_start_timeout(struct ccw_device *cdev, struct tcw *tcw, | |
664 | unsigned long intparm, u8 lpm, int expires) | |
665 | { | |
666 | return ccw_device_tm_start_timeout_key(cdev, tcw, intparm, lpm, | |
667 | PAGE_DEFAULT_KEY, expires); | |
668 | } | |
669 | EXPORT_SYMBOL(ccw_device_tm_start_timeout); | |
670 | ||
671 | /** | |
672 | * ccw_device_tm_intrg - perform interrogate function | |
673 | * @cdev: ccw device on which to perform the interrogate function | |
674 | * | |
675 | * Perform an interrogate function on the given ccw device. Return zero on | |
676 | * success, non-zero otherwise. | |
677 | */ | |
678 | int ccw_device_tm_intrg(struct ccw_device *cdev) | |
679 | { | |
680 | struct subchannel *sch = to_subchannel(cdev->dev.parent); | |
681 | ||
823d494a SO |
682 | if (!sch->schib.pmcw.ena) |
683 | return -EINVAL; | |
83262d63 PO |
684 | if (cdev->private->state != DEV_STATE_ONLINE) |
685 | return -EIO; | |
686 | if (!scsw_is_tm(&sch->schib.scsw) || | |
7a968f05 | 687 | !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_START_PEND)) |
83262d63 PO |
688 | return -EINVAL; |
689 | return cio_tm_intrg(sch); | |
690 | } | |
691 | EXPORT_SYMBOL(ccw_device_tm_intrg); | |
692 | ||
1da177e4 LT |
693 | // FIXME: these have to go: |
694 | ||
695 | int | |
696 | _ccw_device_get_subchannel_number(struct ccw_device *cdev) | |
697 | { | |
78964268 | 698 | return cdev->private->schid.sch_no; |
1da177e4 LT |
699 | } |
700 | ||
1da177e4 LT |
701 | |
702 | MODULE_LICENSE("GPL"); | |
4dd3cc5c | 703 | EXPORT_SYMBOL(ccw_device_set_options_mask); |
1da177e4 | 704 | EXPORT_SYMBOL(ccw_device_set_options); |
4dd3cc5c | 705 | EXPORT_SYMBOL(ccw_device_clear_options); |
1da177e4 LT |
706 | EXPORT_SYMBOL(ccw_device_clear); |
707 | EXPORT_SYMBOL(ccw_device_halt); | |
708 | EXPORT_SYMBOL(ccw_device_resume); | |
709 | EXPORT_SYMBOL(ccw_device_start_timeout); | |
710 | EXPORT_SYMBOL(ccw_device_start); | |
711 | EXPORT_SYMBOL(ccw_device_start_timeout_key); | |
712 | EXPORT_SYMBOL(ccw_device_start_key); | |
713 | EXPORT_SYMBOL(ccw_device_get_ciw); | |
714 | EXPORT_SYMBOL(ccw_device_get_path_mask); | |
1da177e4 | 715 | EXPORT_SYMBOL(_ccw_device_get_subchannel_number); |
1da177e4 | 716 | EXPORT_SYMBOL_GPL(ccw_device_get_chp_desc); |