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1 | // SPDX-License-Identifier: GPL-2.0 | |
2 | /* | |
3 | * tape device discipline for 3590 tapes. | |
4 | * | |
5 | * Copyright IBM Corp. 2001, 2009 | |
6 | * Author(s): Stefan Bader <shbader@de.ibm.com> | |
7 | * Michael Holzheu <holzheu@de.ibm.com> | |
8 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
9 | */ | |
10 | ||
11 | #define KMSG_COMPONENT "tape_3590" | |
12 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/bio.h> | |
18 | #include <asm/ebcdic.h> | |
19 | ||
20 | #define TAPE_DBF_AREA tape_3590_dbf | |
21 | #define BUFSIZE 512 /* size of buffers for dynamic generated messages */ | |
22 | ||
23 | #include "tape.h" | |
24 | #include "tape_std.h" | |
25 | #include "tape_3590.h" | |
26 | ||
27 | static struct workqueue_struct *tape_3590_wq; | |
28 | ||
29 | /* | |
30 | * Pointer to debug area. | |
31 | */ | |
32 | debug_info_t *TAPE_DBF_AREA = NULL; | |
33 | EXPORT_SYMBOL(TAPE_DBF_AREA); | |
34 | ||
35 | /******************************************************************* | |
36 | * Error Recovery functions: | |
37 | * - Read Opposite: implemented | |
38 | * - Read Device (buffered) log: BRA | |
39 | * - Read Library log: BRA | |
40 | * - Swap Devices: BRA | |
41 | * - Long Busy: implemented | |
42 | * - Special Intercept: BRA | |
43 | * - Read Alternate: implemented | |
44 | *******************************************************************/ | |
45 | ||
46 | static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { | |
47 | [0x00] = "", | |
48 | [0x10] = "Lost Sense", | |
49 | [0x11] = "Assigned Elsewhere", | |
50 | [0x12] = "Allegiance Reset", | |
51 | [0x13] = "Shared Access Violation", | |
52 | [0x20] = "Command Reject", | |
53 | [0x21] = "Configuration Error", | |
54 | [0x22] = "Protection Exception", | |
55 | [0x23] = "Write Protect", | |
56 | [0x24] = "Write Length", | |
57 | [0x25] = "Read-Only Format", | |
58 | [0x31] = "Beginning of Partition", | |
59 | [0x33] = "End of Partition", | |
60 | [0x34] = "End of Data", | |
61 | [0x35] = "Block not found", | |
62 | [0x40] = "Device Intervention", | |
63 | [0x41] = "Loader Intervention", | |
64 | [0x42] = "Library Intervention", | |
65 | [0x50] = "Write Error", | |
66 | [0x51] = "Erase Error", | |
67 | [0x52] = "Formatting Error", | |
68 | [0x53] = "Read Error", | |
69 | [0x54] = "Unsupported Format", | |
70 | [0x55] = "No Formatting", | |
71 | [0x56] = "Positioning lost", | |
72 | [0x57] = "Read Length", | |
73 | [0x60] = "Unsupported Medium", | |
74 | [0x61] = "Medium Length Error", | |
75 | [0x62] = "Medium removed", | |
76 | [0x64] = "Load Check", | |
77 | [0x65] = "Unload Check", | |
78 | [0x70] = "Equipment Check", | |
79 | [0x71] = "Bus out Check", | |
80 | [0x72] = "Protocol Error", | |
81 | [0x73] = "Interface Error", | |
82 | [0x74] = "Overrun", | |
83 | [0x75] = "Halt Signal", | |
84 | [0x90] = "Device fenced", | |
85 | [0x91] = "Device Path fenced", | |
86 | [0xa0] = "Volume misplaced", | |
87 | [0xa1] = "Volume inaccessible", | |
88 | [0xa2] = "Volume in input", | |
89 | [0xa3] = "Volume ejected", | |
90 | [0xa4] = "All categories reserved", | |
91 | [0xa5] = "Duplicate Volume", | |
92 | [0xa6] = "Library Manager Offline", | |
93 | [0xa7] = "Library Output Station full", | |
94 | [0xa8] = "Vision System non-operational", | |
95 | [0xa9] = "Library Manager Equipment Check", | |
96 | [0xaa] = "Library Equipment Check", | |
97 | [0xab] = "All Library Cells full", | |
98 | [0xac] = "No Cleaner Volumes in Library", | |
99 | [0xad] = "I/O Station door open", | |
100 | [0xae] = "Subsystem environmental alert", | |
101 | }; | |
102 | ||
103 | static int crypt_supported(struct tape_device *device) | |
104 | { | |
105 | return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); | |
106 | } | |
107 | ||
108 | static int crypt_enabled(struct tape_device *device) | |
109 | { | |
110 | return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); | |
111 | } | |
112 | ||
113 | static void ext_to_int_kekl(struct tape390_kekl *in, | |
114 | struct tape3592_kekl *out) | |
115 | { | |
116 | int i; | |
117 | ||
118 | memset(out, 0, sizeof(*out)); | |
119 | if (in->type == TAPE390_KEKL_TYPE_HASH) | |
120 | out->flags |= 0x40; | |
121 | if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH) | |
122 | out->flags |= 0x80; | |
123 | strncpy(out->label, in->label, 64); | |
124 | for (i = strlen(in->label); i < sizeof(out->label); i++) | |
125 | out->label[i] = ' '; | |
126 | ASCEBC(out->label, sizeof(out->label)); | |
127 | } | |
128 | ||
129 | static void int_to_ext_kekl(struct tape3592_kekl *in, | |
130 | struct tape390_kekl *out) | |
131 | { | |
132 | memset(out, 0, sizeof(*out)); | |
133 | if(in->flags & 0x40) | |
134 | out->type = TAPE390_KEKL_TYPE_HASH; | |
135 | else | |
136 | out->type = TAPE390_KEKL_TYPE_LABEL; | |
137 | if(in->flags & 0x80) | |
138 | out->type_on_tape = TAPE390_KEKL_TYPE_HASH; | |
139 | else | |
140 | out->type_on_tape = TAPE390_KEKL_TYPE_LABEL; | |
141 | memcpy(out->label, in->label, sizeof(in->label)); | |
142 | EBCASC(out->label, sizeof(in->label)); | |
143 | strim(out->label); | |
144 | } | |
145 | ||
146 | static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in, | |
147 | struct tape390_kekl_pair *out) | |
148 | { | |
149 | if (in->count == 0) { | |
150 | out->kekl[0].type = TAPE390_KEKL_TYPE_NONE; | |
151 | out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE; | |
152 | out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; | |
153 | out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; | |
154 | } else if (in->count == 1) { | |
155 | int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); | |
156 | out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; | |
157 | out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; | |
158 | } else if (in->count == 2) { | |
159 | int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); | |
160 | int_to_ext_kekl(&in->kekl[1], &out->kekl[1]); | |
161 | } else { | |
162 | printk("Invalid KEKL number: %d\n", in->count); | |
163 | BUG(); | |
164 | } | |
165 | } | |
166 | ||
167 | static int check_ext_kekl(struct tape390_kekl *kekl) | |
168 | { | |
169 | if (kekl->type == TAPE390_KEKL_TYPE_NONE) | |
170 | goto invalid; | |
171 | if (kekl->type > TAPE390_KEKL_TYPE_HASH) | |
172 | goto invalid; | |
173 | if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE) | |
174 | goto invalid; | |
175 | if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH) | |
176 | goto invalid; | |
177 | if ((kekl->type == TAPE390_KEKL_TYPE_HASH) && | |
178 | (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL)) | |
179 | goto invalid; | |
180 | ||
181 | return 0; | |
182 | invalid: | |
183 | return -EINVAL; | |
184 | } | |
185 | ||
186 | static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls) | |
187 | { | |
188 | if (check_ext_kekl(&kekls->kekl[0])) | |
189 | goto invalid; | |
190 | if (check_ext_kekl(&kekls->kekl[1])) | |
191 | goto invalid; | |
192 | ||
193 | return 0; | |
194 | invalid: | |
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | /* | |
199 | * Query KEKLs | |
200 | */ | |
201 | static int tape_3592_kekl_query(struct tape_device *device, | |
202 | struct tape390_kekl_pair *ext_kekls) | |
203 | { | |
204 | struct tape_request *request; | |
205 | struct tape3592_kekl_query_order *order; | |
206 | struct tape3592_kekl_query_data *int_kekls; | |
207 | int rc; | |
208 | ||
209 | DBF_EVENT(6, "tape3592_kekl_query\n"); | |
210 | int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); | |
211 | if (!int_kekls) | |
212 | return -ENOMEM; | |
213 | request = tape_alloc_request(2, sizeof(*order)); | |
214 | if (IS_ERR(request)) { | |
215 | rc = PTR_ERR(request); | |
216 | goto fail_malloc; | |
217 | } | |
218 | order = request->cpdata; | |
219 | memset(order,0,sizeof(*order)); | |
220 | order->code = 0xe2; | |
221 | order->max_count = 2; | |
222 | request->op = TO_KEKL_QUERY; | |
223 | tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); | |
224 | tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls), | |
225 | int_kekls); | |
226 | rc = tape_do_io(device, request); | |
227 | if (rc) | |
228 | goto fail_request; | |
229 | int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls); | |
230 | ||
231 | rc = 0; | |
232 | fail_request: | |
233 | tape_free_request(request); | |
234 | fail_malloc: | |
235 | kfree(int_kekls); | |
236 | return rc; | |
237 | } | |
238 | ||
239 | /* | |
240 | * IOCTL: Query KEKLs | |
241 | */ | |
242 | static int tape_3592_ioctl_kekl_query(struct tape_device *device, | |
243 | unsigned long arg) | |
244 | { | |
245 | int rc; | |
246 | struct tape390_kekl_pair *ext_kekls; | |
247 | ||
248 | DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n"); | |
249 | if (!crypt_supported(device)) | |
250 | return -ENOSYS; | |
251 | if (!crypt_enabled(device)) | |
252 | return -EUNATCH; | |
253 | ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); | |
254 | if (!ext_kekls) | |
255 | return -ENOMEM; | |
256 | rc = tape_3592_kekl_query(device, ext_kekls); | |
257 | if (rc != 0) | |
258 | goto fail; | |
259 | if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) { | |
260 | rc = -EFAULT; | |
261 | goto fail; | |
262 | } | |
263 | rc = 0; | |
264 | fail: | |
265 | kfree(ext_kekls); | |
266 | return rc; | |
267 | } | |
268 | ||
269 | static int tape_3590_mttell(struct tape_device *device, int mt_count); | |
270 | ||
271 | /* | |
272 | * Set KEKLs | |
273 | */ | |
274 | static int tape_3592_kekl_set(struct tape_device *device, | |
275 | struct tape390_kekl_pair *ext_kekls) | |
276 | { | |
277 | struct tape_request *request; | |
278 | struct tape3592_kekl_set_order *order; | |
279 | ||
280 | DBF_EVENT(6, "tape3592_kekl_set\n"); | |
281 | if (check_ext_kekl_pair(ext_kekls)) { | |
282 | DBF_EVENT(6, "invalid kekls\n"); | |
283 | return -EINVAL; | |
284 | } | |
285 | if (tape_3590_mttell(device, 0) != 0) | |
286 | return -EBADSLT; | |
287 | request = tape_alloc_request(1, sizeof(*order)); | |
288 | if (IS_ERR(request)) | |
289 | return PTR_ERR(request); | |
290 | order = request->cpdata; | |
291 | memset(order, 0, sizeof(*order)); | |
292 | order->code = 0xe3; | |
293 | order->kekls.count = 2; | |
294 | ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]); | |
295 | ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]); | |
296 | request->op = TO_KEKL_SET; | |
297 | tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); | |
298 | ||
299 | return tape_do_io_free(device, request); | |
300 | } | |
301 | ||
302 | /* | |
303 | * IOCTL: Set KEKLs | |
304 | */ | |
305 | static int tape_3592_ioctl_kekl_set(struct tape_device *device, | |
306 | unsigned long arg) | |
307 | { | |
308 | int rc; | |
309 | struct tape390_kekl_pair *ext_kekls; | |
310 | ||
311 | DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n"); | |
312 | if (!crypt_supported(device)) | |
313 | return -ENOSYS; | |
314 | if (!crypt_enabled(device)) | |
315 | return -EUNATCH; | |
316 | ext_kekls = memdup_user((char __user *)arg, sizeof(*ext_kekls)); | |
317 | if (IS_ERR(ext_kekls)) | |
318 | return PTR_ERR(ext_kekls); | |
319 | rc = tape_3592_kekl_set(device, ext_kekls); | |
320 | kfree(ext_kekls); | |
321 | return rc; | |
322 | } | |
323 | ||
324 | /* | |
325 | * Enable encryption | |
326 | */ | |
327 | static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device) | |
328 | { | |
329 | struct tape_request *request; | |
330 | char *data; | |
331 | ||
332 | DBF_EVENT(6, "tape_3592_enable_crypt\n"); | |
333 | if (!crypt_supported(device)) | |
334 | return ERR_PTR(-ENOSYS); | |
335 | request = tape_alloc_request(2, 72); | |
336 | if (IS_ERR(request)) | |
337 | return request; | |
338 | data = request->cpdata; | |
339 | memset(data,0,72); | |
340 | ||
341 | data[0] = 0x05; | |
342 | data[36 + 0] = 0x03; | |
343 | data[36 + 1] = 0x03; | |
344 | data[36 + 4] = 0x40; | |
345 | data[36 + 6] = 0x01; | |
346 | data[36 + 14] = 0x2f; | |
347 | data[36 + 18] = 0xc3; | |
348 | data[36 + 35] = 0x72; | |
349 | request->op = TO_CRYPT_ON; | |
350 | tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); | |
351 | tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); | |
352 | return request; | |
353 | } | |
354 | ||
355 | static int tape_3592_enable_crypt(struct tape_device *device) | |
356 | { | |
357 | struct tape_request *request; | |
358 | ||
359 | request = __tape_3592_enable_crypt(device); | |
360 | if (IS_ERR(request)) | |
361 | return PTR_ERR(request); | |
362 | return tape_do_io_free(device, request); | |
363 | } | |
364 | ||
365 | static void tape_3592_enable_crypt_async(struct tape_device *device) | |
366 | { | |
367 | struct tape_request *request; | |
368 | ||
369 | request = __tape_3592_enable_crypt(device); | |
370 | if (!IS_ERR(request)) | |
371 | tape_do_io_async_free(device, request); | |
372 | } | |
373 | ||
374 | /* | |
375 | * Disable encryption | |
376 | */ | |
377 | static struct tape_request *__tape_3592_disable_crypt(struct tape_device *device) | |
378 | { | |
379 | struct tape_request *request; | |
380 | char *data; | |
381 | ||
382 | DBF_EVENT(6, "tape_3592_disable_crypt\n"); | |
383 | if (!crypt_supported(device)) | |
384 | return ERR_PTR(-ENOSYS); | |
385 | request = tape_alloc_request(2, 72); | |
386 | if (IS_ERR(request)) | |
387 | return request; | |
388 | data = request->cpdata; | |
389 | memset(data,0,72); | |
390 | ||
391 | data[0] = 0x05; | |
392 | data[36 + 0] = 0x03; | |
393 | data[36 + 1] = 0x03; | |
394 | data[36 + 35] = 0x32; | |
395 | ||
396 | request->op = TO_CRYPT_OFF; | |
397 | tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); | |
398 | tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); | |
399 | ||
400 | return request; | |
401 | } | |
402 | ||
403 | static int tape_3592_disable_crypt(struct tape_device *device) | |
404 | { | |
405 | struct tape_request *request; | |
406 | ||
407 | request = __tape_3592_disable_crypt(device); | |
408 | if (IS_ERR(request)) | |
409 | return PTR_ERR(request); | |
410 | return tape_do_io_free(device, request); | |
411 | } | |
412 | ||
413 | static void tape_3592_disable_crypt_async(struct tape_device *device) | |
414 | { | |
415 | struct tape_request *request; | |
416 | ||
417 | request = __tape_3592_disable_crypt(device); | |
418 | if (!IS_ERR(request)) | |
419 | tape_do_io_async_free(device, request); | |
420 | } | |
421 | ||
422 | /* | |
423 | * IOCTL: Set encryption status | |
424 | */ | |
425 | static int tape_3592_ioctl_crypt_set(struct tape_device *device, | |
426 | unsigned long arg) | |
427 | { | |
428 | struct tape390_crypt_info info; | |
429 | ||
430 | DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); | |
431 | if (!crypt_supported(device)) | |
432 | return -ENOSYS; | |
433 | if (copy_from_user(&info, (char __user *)arg, sizeof(info))) | |
434 | return -EFAULT; | |
435 | if (info.status & ~TAPE390_CRYPT_ON_MASK) | |
436 | return -EINVAL; | |
437 | if (info.status & TAPE390_CRYPT_ON_MASK) | |
438 | return tape_3592_enable_crypt(device); | |
439 | else | |
440 | return tape_3592_disable_crypt(device); | |
441 | } | |
442 | ||
443 | static int tape_3590_sense_medium(struct tape_device *device); | |
444 | ||
445 | /* | |
446 | * IOCTL: Query enryption status | |
447 | */ | |
448 | static int tape_3592_ioctl_crypt_query(struct tape_device *device, | |
449 | unsigned long arg) | |
450 | { | |
451 | DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); | |
452 | if (!crypt_supported(device)) | |
453 | return -ENOSYS; | |
454 | tape_3590_sense_medium(device); | |
455 | if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), | |
456 | sizeof(TAPE_3590_CRYPT_INFO(device)))) | |
457 | return -EFAULT; | |
458 | else | |
459 | return 0; | |
460 | } | |
461 | ||
462 | /* | |
463 | * 3590 IOCTL Overload | |
464 | */ | |
465 | static int | |
466 | tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) | |
467 | { | |
468 | switch (cmd) { | |
469 | case TAPE390_DISPLAY: { | |
470 | struct display_struct disp; | |
471 | ||
472 | if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) | |
473 | return -EFAULT; | |
474 | ||
475 | return tape_std_display(device, &disp); | |
476 | } | |
477 | case TAPE390_KEKL_SET: | |
478 | return tape_3592_ioctl_kekl_set(device, arg); | |
479 | case TAPE390_KEKL_QUERY: | |
480 | return tape_3592_ioctl_kekl_query(device, arg); | |
481 | case TAPE390_CRYPT_SET: | |
482 | return tape_3592_ioctl_crypt_set(device, arg); | |
483 | case TAPE390_CRYPT_QUERY: | |
484 | return tape_3592_ioctl_crypt_query(device, arg); | |
485 | default: | |
486 | return -EINVAL; /* no additional ioctls */ | |
487 | } | |
488 | } | |
489 | ||
490 | /* | |
491 | * SENSE Medium: Get Sense data about medium state | |
492 | */ | |
493 | static int tape_3590_sense_medium(struct tape_device *device) | |
494 | { | |
495 | struct tape_request *request; | |
496 | ||
497 | request = tape_alloc_request(1, 128); | |
498 | if (IS_ERR(request)) | |
499 | return PTR_ERR(request); | |
500 | request->op = TO_MSEN; | |
501 | tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); | |
502 | return tape_do_io_free(device, request); | |
503 | } | |
504 | ||
505 | static void tape_3590_sense_medium_async(struct tape_device *device) | |
506 | { | |
507 | struct tape_request *request; | |
508 | ||
509 | request = tape_alloc_request(1, 128); | |
510 | if (IS_ERR(request)) | |
511 | return; | |
512 | request->op = TO_MSEN; | |
513 | tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); | |
514 | tape_do_io_async_free(device, request); | |
515 | } | |
516 | ||
517 | /* | |
518 | * MTTELL: Tell block. Return the number of block relative to current file. | |
519 | */ | |
520 | static int | |
521 | tape_3590_mttell(struct tape_device *device, int mt_count) | |
522 | { | |
523 | __u64 block_id; | |
524 | int rc; | |
525 | ||
526 | rc = tape_std_read_block_id(device, &block_id); | |
527 | if (rc) | |
528 | return rc; | |
529 | return block_id >> 32; | |
530 | } | |
531 | ||
532 | /* | |
533 | * MTSEEK: seek to the specified block. | |
534 | */ | |
535 | static int | |
536 | tape_3590_mtseek(struct tape_device *device, int count) | |
537 | { | |
538 | struct tape_request *request; | |
539 | ||
540 | DBF_EVENT(6, "xsee id: %x\n", count); | |
541 | request = tape_alloc_request(3, 4); | |
542 | if (IS_ERR(request)) | |
543 | return PTR_ERR(request); | |
544 | request->op = TO_LBL; | |
545 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
546 | *(__u32 *) request->cpdata = count; | |
547 | tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); | |
548 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
549 | return tape_do_io_free(device, request); | |
550 | } | |
551 | ||
552 | /* | |
553 | * Read Opposite Error Recovery Function: | |
554 | * Used, when Read Forward does not work | |
555 | */ | |
556 | static void | |
557 | tape_3590_read_opposite(struct tape_device *device, | |
558 | struct tape_request *request) | |
559 | { | |
560 | struct tape_3590_disc_data *data; | |
561 | ||
562 | /* | |
563 | * We have allocated 4 ccws in tape_std_read, so we can now | |
564 | * transform the request to a read backward, followed by a | |
565 | * forward space block. | |
566 | */ | |
567 | request->op = TO_RBA; | |
568 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
569 | data = device->discdata; | |
570 | tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, | |
571 | device->char_data.idal_buf); | |
572 | tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); | |
573 | tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); | |
574 | DBF_EVENT(6, "xrop ccwg\n"); | |
575 | } | |
576 | ||
577 | /* | |
578 | * Read Attention Msg | |
579 | * This should be done after an interrupt with attention bit (0x80) | |
580 | * in device state. | |
581 | * | |
582 | * After a "read attention message" request there are two possible | |
583 | * results: | |
584 | * | |
585 | * 1. A unit check is presented, when attention sense is present (e.g. when | |
586 | * a medium has been unloaded). The attention sense comes then | |
587 | * together with the unit check. The recovery action is either "retry" | |
588 | * (in case there is an attention message pending) or "permanent error". | |
589 | * | |
590 | * 2. The attention msg is written to the "read subsystem data" buffer. | |
591 | * In this case we probably should print it to the console. | |
592 | */ | |
593 | static void tape_3590_read_attmsg_async(struct tape_device *device) | |
594 | { | |
595 | struct tape_request *request; | |
596 | char *buf; | |
597 | ||
598 | request = tape_alloc_request(3, 4096); | |
599 | if (IS_ERR(request)) | |
600 | return; | |
601 | request->op = TO_READ_ATTMSG; | |
602 | buf = request->cpdata; | |
603 | buf[0] = PREP_RD_SS_DATA; | |
604 | buf[6] = RD_ATTMSG; /* read att msg */ | |
605 | tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); | |
606 | tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); | |
607 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
608 | tape_do_io_async_free(device, request); | |
609 | } | |
610 | ||
611 | /* | |
612 | * These functions are used to schedule follow-up actions from within an | |
613 | * interrupt context (like unsolicited interrupts). | |
614 | * Note: the work handler is called by the system work queue. The tape | |
615 | * commands started by the handler need to be asynchrounous, otherwise | |
616 | * a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq). | |
617 | */ | |
618 | struct work_handler_data { | |
619 | struct tape_device *device; | |
620 | enum tape_op op; | |
621 | struct work_struct work; | |
622 | }; | |
623 | ||
624 | static void | |
625 | tape_3590_work_handler(struct work_struct *work) | |
626 | { | |
627 | struct work_handler_data *p = | |
628 | container_of(work, struct work_handler_data, work); | |
629 | ||
630 | switch (p->op) { | |
631 | case TO_MSEN: | |
632 | tape_3590_sense_medium_async(p->device); | |
633 | break; | |
634 | case TO_READ_ATTMSG: | |
635 | tape_3590_read_attmsg_async(p->device); | |
636 | break; | |
637 | case TO_CRYPT_ON: | |
638 | tape_3592_enable_crypt_async(p->device); | |
639 | break; | |
640 | case TO_CRYPT_OFF: | |
641 | tape_3592_disable_crypt_async(p->device); | |
642 | break; | |
643 | default: | |
644 | DBF_EVENT(3, "T3590: work handler undefined for " | |
645 | "operation 0x%02x\n", p->op); | |
646 | } | |
647 | tape_put_device(p->device); | |
648 | kfree(p); | |
649 | } | |
650 | ||
651 | static int | |
652 | tape_3590_schedule_work(struct tape_device *device, enum tape_op op) | |
653 | { | |
654 | struct work_handler_data *p; | |
655 | ||
656 | if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) | |
657 | return -ENOMEM; | |
658 | ||
659 | INIT_WORK(&p->work, tape_3590_work_handler); | |
660 | ||
661 | p->device = tape_get_device(device); | |
662 | p->op = op; | |
663 | ||
664 | queue_work(tape_3590_wq, &p->work); | |
665 | return 0; | |
666 | } | |
667 | ||
668 | static void tape_3590_med_state_set(struct tape_device *device, | |
669 | struct tape_3590_med_sense *sense) | |
670 | { | |
671 | struct tape390_crypt_info *c_info; | |
672 | ||
673 | c_info = &TAPE_3590_CRYPT_INFO(device); | |
674 | ||
675 | DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); | |
676 | switch (sense->macst) { | |
677 | case 0x04: | |
678 | case 0x05: | |
679 | case 0x06: | |
680 | tape_med_state_set(device, MS_UNLOADED); | |
681 | TAPE_3590_CRYPT_INFO(device).medium_status = 0; | |
682 | return; | |
683 | case 0x08: | |
684 | case 0x09: | |
685 | tape_med_state_set(device, MS_LOADED); | |
686 | break; | |
687 | default: | |
688 | tape_med_state_set(device, MS_UNKNOWN); | |
689 | return; | |
690 | } | |
691 | c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; | |
692 | if (sense->flags & MSENSE_CRYPT_MASK) { | |
693 | DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); | |
694 | c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; | |
695 | } else { | |
696 | DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); | |
697 | c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; | |
698 | } | |
699 | } | |
700 | ||
701 | /* | |
702 | * The done handler is called at device/channel end and wakes up the sleeping | |
703 | * process | |
704 | */ | |
705 | static int | |
706 | tape_3590_done(struct tape_device *device, struct tape_request *request) | |
707 | { | |
708 | ||
709 | DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); | |
710 | ||
711 | switch (request->op) { | |
712 | case TO_BSB: | |
713 | case TO_BSF: | |
714 | case TO_DSE: | |
715 | case TO_FSB: | |
716 | case TO_FSF: | |
717 | case TO_LBL: | |
718 | case TO_RFO: | |
719 | case TO_RBA: | |
720 | case TO_REW: | |
721 | case TO_WRI: | |
722 | case TO_WTM: | |
723 | case TO_BLOCK: | |
724 | case TO_LOAD: | |
725 | tape_med_state_set(device, MS_LOADED); | |
726 | break; | |
727 | case TO_RUN: | |
728 | tape_med_state_set(device, MS_UNLOADED); | |
729 | tape_3590_schedule_work(device, TO_CRYPT_OFF); | |
730 | break; | |
731 | case TO_MSEN: | |
732 | tape_3590_med_state_set(device, request->cpdata); | |
733 | break; | |
734 | case TO_CRYPT_ON: | |
735 | TAPE_3590_CRYPT_INFO(device).status | |
736 | |= TAPE390_CRYPT_ON_MASK; | |
737 | *(device->modeset_byte) |= 0x03; | |
738 | break; | |
739 | case TO_CRYPT_OFF: | |
740 | TAPE_3590_CRYPT_INFO(device).status | |
741 | &= ~TAPE390_CRYPT_ON_MASK; | |
742 | *(device->modeset_byte) &= ~0x03; | |
743 | break; | |
744 | case TO_RBI: /* RBI seems to succeed even without medium loaded. */ | |
745 | case TO_NOP: /* Same to NOP. */ | |
746 | case TO_READ_CONFIG: | |
747 | case TO_READ_ATTMSG: | |
748 | case TO_DIS: | |
749 | case TO_ASSIGN: | |
750 | case TO_UNASSIGN: | |
751 | case TO_SIZE: | |
752 | case TO_KEKL_SET: | |
753 | case TO_KEKL_QUERY: | |
754 | case TO_RDC: | |
755 | break; | |
756 | } | |
757 | return TAPE_IO_SUCCESS; | |
758 | } | |
759 | ||
760 | /* | |
761 | * This function is called, when error recovery was successful | |
762 | */ | |
763 | static inline int | |
764 | tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) | |
765 | { | |
766 | DBF_EVENT(3, "Error Recovery successful for %s\n", | |
767 | tape_op_verbose[request->op]); | |
768 | return tape_3590_done(device, request); | |
769 | } | |
770 | ||
771 | /* | |
772 | * This function is called, when error recovery was not successful | |
773 | */ | |
774 | static inline int | |
775 | tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, | |
776 | struct irb *irb, int rc) | |
777 | { | |
778 | DBF_EVENT(3, "Error Recovery failed for %s\n", | |
779 | tape_op_verbose[request->op]); | |
780 | tape_dump_sense_dbf(device, request, irb); | |
781 | return rc; | |
782 | } | |
783 | ||
784 | /* | |
785 | * Error Recovery do retry | |
786 | */ | |
787 | static inline int | |
788 | tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, | |
789 | struct irb *irb) | |
790 | { | |
791 | DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); | |
792 | tape_dump_sense_dbf(device, request, irb); | |
793 | return TAPE_IO_RETRY; | |
794 | } | |
795 | ||
796 | /* | |
797 | * Handle unsolicited interrupts | |
798 | */ | |
799 | static int | |
800 | tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) | |
801 | { | |
802 | if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) | |
803 | /* Probably result of halt ssch */ | |
804 | return TAPE_IO_PENDING; | |
805 | else if (irb->scsw.cmd.dstat == 0x85) | |
806 | /* Device Ready */ | |
807 | DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); | |
808 | else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { | |
809 | tape_3590_schedule_work(device, TO_READ_ATTMSG); | |
810 | } else { | |
811 | DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); | |
812 | tape_dump_sense_dbf(device, NULL, irb); | |
813 | } | |
814 | /* check medium state */ | |
815 | tape_3590_schedule_work(device, TO_MSEN); | |
816 | return TAPE_IO_SUCCESS; | |
817 | } | |
818 | ||
819 | /* | |
820 | * Basic Recovery routine | |
821 | */ | |
822 | static int | |
823 | tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, | |
824 | struct irb *irb, int rc) | |
825 | { | |
826 | struct tape_3590_sense *sense; | |
827 | ||
828 | sense = (struct tape_3590_sense *) irb->ecw; | |
829 | ||
830 | switch (sense->bra) { | |
831 | case SENSE_BRA_PER: | |
832 | return tape_3590_erp_failed(device, request, irb, rc); | |
833 | case SENSE_BRA_CONT: | |
834 | return tape_3590_erp_succeded(device, request); | |
835 | case SENSE_BRA_RE: | |
836 | return tape_3590_erp_retry(device, request, irb); | |
837 | case SENSE_BRA_DRE: | |
838 | return tape_3590_erp_failed(device, request, irb, rc); | |
839 | default: | |
840 | BUG(); | |
841 | return TAPE_IO_STOP; | |
842 | } | |
843 | } | |
844 | ||
845 | /* | |
846 | * RDL: Read Device (buffered) log | |
847 | */ | |
848 | static int | |
849 | tape_3590_erp_read_buf_log(struct tape_device *device, | |
850 | struct tape_request *request, struct irb *irb) | |
851 | { | |
852 | /* | |
853 | * We just do the basic error recovery at the moment (retry). | |
854 | * Perhaps in the future, we read the log and dump it somewhere... | |
855 | */ | |
856 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
857 | } | |
858 | ||
859 | /* | |
860 | * SWAP: Swap Devices | |
861 | */ | |
862 | static int | |
863 | tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, | |
864 | struct irb *irb) | |
865 | { | |
866 | /* | |
867 | * This error recovery should swap the tapes | |
868 | * if the original has a problem. The operation | |
869 | * should proceed with the new tape... this | |
870 | * should probably be done in user space! | |
871 | */ | |
872 | dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " | |
873 | "different tape unit\n"); | |
874 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
875 | } | |
876 | ||
877 | /* | |
878 | * LBY: Long Busy | |
879 | */ | |
880 | static int | |
881 | tape_3590_erp_long_busy(struct tape_device *device, | |
882 | struct tape_request *request, struct irb *irb) | |
883 | { | |
884 | DBF_EVENT(6, "Device is busy\n"); | |
885 | return TAPE_IO_LONG_BUSY; | |
886 | } | |
887 | ||
888 | /* | |
889 | * SPI: Special Intercept | |
890 | */ | |
891 | static int | |
892 | tape_3590_erp_special_interrupt(struct tape_device *device, | |
893 | struct tape_request *request, struct irb *irb) | |
894 | { | |
895 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
896 | } | |
897 | ||
898 | /* | |
899 | * RDA: Read Alternate | |
900 | */ | |
901 | static int | |
902 | tape_3590_erp_read_alternate(struct tape_device *device, | |
903 | struct tape_request *request, struct irb *irb) | |
904 | { | |
905 | struct tape_3590_disc_data *data; | |
906 | ||
907 | /* | |
908 | * The issued Read Backward or Read Previous command is not | |
909 | * supported by the device | |
910 | * The recovery action should be to issue another command: | |
911 | * Read Revious: if Read Backward is not supported | |
912 | * Read Backward: if Read Previous is not supported | |
913 | */ | |
914 | data = device->discdata; | |
915 | if (data->read_back_op == READ_PREVIOUS) { | |
916 | DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", | |
917 | device->cdev_id); | |
918 | data->read_back_op = READ_BACKWARD; | |
919 | } else { | |
920 | DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", | |
921 | device->cdev_id); | |
922 | data->read_back_op = READ_PREVIOUS; | |
923 | } | |
924 | tape_3590_read_opposite(device, request); | |
925 | return tape_3590_erp_retry(device, request, irb); | |
926 | } | |
927 | ||
928 | /* | |
929 | * Error Recovery read opposite | |
930 | */ | |
931 | static int | |
932 | tape_3590_erp_read_opposite(struct tape_device *device, | |
933 | struct tape_request *request, struct irb *irb) | |
934 | { | |
935 | switch (request->op) { | |
936 | case TO_RFO: | |
937 | /* | |
938 | * We did read forward, but the data could not be read. | |
939 | * We will read backward and then skip forward again. | |
940 | */ | |
941 | tape_3590_read_opposite(device, request); | |
942 | return tape_3590_erp_retry(device, request, irb); | |
943 | case TO_RBA: | |
944 | /* We tried to read forward and backward, but hat no success */ | |
945 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
946 | break; | |
947 | default: | |
948 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
949 | } | |
950 | } | |
951 | ||
952 | /* | |
953 | * Print an MIM (Media Information Message) (message code f0) | |
954 | */ | |
955 | static void | |
956 | tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) | |
957 | { | |
958 | struct tape_3590_sense *sense; | |
959 | char *exception, *service; | |
960 | ||
961 | exception = kmalloc(BUFSIZE, GFP_ATOMIC); | |
962 | service = kmalloc(BUFSIZE, GFP_ATOMIC); | |
963 | ||
964 | if (!exception || !service) | |
965 | goto out_nomem; | |
966 | ||
967 | sense = (struct tape_3590_sense *) irb->ecw; | |
968 | /* Exception Message */ | |
969 | switch (sense->fmt.f70.emc) { | |
970 | case 0x02: | |
971 | snprintf(exception, BUFSIZE, "Data degraded"); | |
972 | break; | |
973 | case 0x03: | |
974 | snprintf(exception, BUFSIZE, "Data degraded in partion %i", | |
975 | sense->fmt.f70.mp); | |
976 | break; | |
977 | case 0x04: | |
978 | snprintf(exception, BUFSIZE, "Medium degraded"); | |
979 | break; | |
980 | case 0x05: | |
981 | snprintf(exception, BUFSIZE, "Medium degraded in partition %i", | |
982 | sense->fmt.f70.mp); | |
983 | break; | |
984 | case 0x06: | |
985 | snprintf(exception, BUFSIZE, "Block 0 Error"); | |
986 | break; | |
987 | case 0x07: | |
988 | snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", | |
989 | sense->fmt.f70.md); | |
990 | break; | |
991 | default: | |
992 | snprintf(exception, BUFSIZE, "0x%02x", | |
993 | sense->fmt.f70.emc); | |
994 | break; | |
995 | } | |
996 | /* Service Message */ | |
997 | switch (sense->fmt.f70.smc) { | |
998 | case 0x02: | |
999 | snprintf(service, BUFSIZE, "Reference Media maintenance " | |
1000 | "procedure %i", sense->fmt.f70.md); | |
1001 | break; | |
1002 | default: | |
1003 | snprintf(service, BUFSIZE, "0x%02x", | |
1004 | sense->fmt.f70.smc); | |
1005 | break; | |
1006 | } | |
1007 | ||
1008 | dev_warn (&device->cdev->dev, "Tape media information: exception %s, " | |
1009 | "service %s\n", exception, service); | |
1010 | ||
1011 | out_nomem: | |
1012 | kfree(exception); | |
1013 | kfree(service); | |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * Print an I/O Subsystem Service Information Message (message code f1) | |
1018 | */ | |
1019 | static void | |
1020 | tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) | |
1021 | { | |
1022 | struct tape_3590_sense *sense; | |
1023 | char *exception, *service; | |
1024 | ||
1025 | exception = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1026 | service = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1027 | ||
1028 | if (!exception || !service) | |
1029 | goto out_nomem; | |
1030 | ||
1031 | sense = (struct tape_3590_sense *) irb->ecw; | |
1032 | /* Exception Message */ | |
1033 | switch (sense->fmt.f71.emc) { | |
1034 | case 0x01: | |
1035 | snprintf(exception, BUFSIZE, "Effect of failure is unknown"); | |
1036 | break; | |
1037 | case 0x02: | |
1038 | snprintf(exception, BUFSIZE, "CU Exception - no performance " | |
1039 | "impact"); | |
1040 | break; | |
1041 | case 0x03: | |
1042 | snprintf(exception, BUFSIZE, "CU Exception on channel " | |
1043 | "interface 0x%02x", sense->fmt.f71.md[0]); | |
1044 | break; | |
1045 | case 0x04: | |
1046 | snprintf(exception, BUFSIZE, "CU Exception on device path " | |
1047 | "0x%02x", sense->fmt.f71.md[0]); | |
1048 | break; | |
1049 | case 0x05: | |
1050 | snprintf(exception, BUFSIZE, "CU Exception on library path " | |
1051 | "0x%02x", sense->fmt.f71.md[0]); | |
1052 | break; | |
1053 | case 0x06: | |
1054 | snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", | |
1055 | sense->fmt.f71.md[0]); | |
1056 | break; | |
1057 | case 0x07: | |
1058 | snprintf(exception, BUFSIZE, "CU Exception on partition " | |
1059 | "0x%02x", sense->fmt.f71.md[0]); | |
1060 | break; | |
1061 | default: | |
1062 | snprintf(exception, BUFSIZE, "0x%02x", | |
1063 | sense->fmt.f71.emc); | |
1064 | } | |
1065 | /* Service Message */ | |
1066 | switch (sense->fmt.f71.smc) { | |
1067 | case 0x01: | |
1068 | snprintf(service, BUFSIZE, "Repair impact is unknown"); | |
1069 | break; | |
1070 | case 0x02: | |
1071 | snprintf(service, BUFSIZE, "Repair will not impact cu " | |
1072 | "performance"); | |
1073 | break; | |
1074 | case 0x03: | |
1075 | if (sense->fmt.f71.mdf == 0) | |
1076 | snprintf(service, BUFSIZE, "Repair will disable node " | |
1077 | "0x%x on CU", sense->fmt.f71.md[1]); | |
1078 | else | |
1079 | snprintf(service, BUFSIZE, "Repair will disable " | |
1080 | "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], | |
1081 | sense->fmt.f71.md[2]); | |
1082 | break; | |
1083 | case 0x04: | |
1084 | if (sense->fmt.f71.mdf == 0) | |
1085 | snprintf(service, BUFSIZE, "Repair will disable " | |
1086 | "channel path 0x%x on CU", | |
1087 | sense->fmt.f71.md[1]); | |
1088 | else | |
1089 | snprintf(service, BUFSIZE, "Repair will disable channel" | |
1090 | " paths (0x%x-0x%x) on CU", | |
1091 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
1092 | break; | |
1093 | case 0x05: | |
1094 | if (sense->fmt.f71.mdf == 0) | |
1095 | snprintf(service, BUFSIZE, "Repair will disable device" | |
1096 | " path 0x%x on CU", sense->fmt.f71.md[1]); | |
1097 | else | |
1098 | snprintf(service, BUFSIZE, "Repair will disable device" | |
1099 | " paths (0x%x-0x%x) on CU", | |
1100 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
1101 | break; | |
1102 | case 0x06: | |
1103 | if (sense->fmt.f71.mdf == 0) | |
1104 | snprintf(service, BUFSIZE, "Repair will disable " | |
1105 | "library path 0x%x on CU", | |
1106 | sense->fmt.f71.md[1]); | |
1107 | else | |
1108 | snprintf(service, BUFSIZE, "Repair will disable " | |
1109 | "library paths (0x%x-0x%x) on CU", | |
1110 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
1111 | break; | |
1112 | case 0x07: | |
1113 | snprintf(service, BUFSIZE, "Repair will disable access to CU"); | |
1114 | break; | |
1115 | default: | |
1116 | snprintf(service, BUFSIZE, "0x%02x", | |
1117 | sense->fmt.f71.smc); | |
1118 | } | |
1119 | ||
1120 | dev_warn (&device->cdev->dev, "I/O subsystem information: exception" | |
1121 | " %s, service %s\n", exception, service); | |
1122 | out_nomem: | |
1123 | kfree(exception); | |
1124 | kfree(service); | |
1125 | } | |
1126 | ||
1127 | /* | |
1128 | * Print an Device Subsystem Service Information Message (message code f2) | |
1129 | */ | |
1130 | static void | |
1131 | tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) | |
1132 | { | |
1133 | struct tape_3590_sense *sense; | |
1134 | char *exception, *service; | |
1135 | ||
1136 | exception = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1137 | service = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1138 | ||
1139 | if (!exception || !service) | |
1140 | goto out_nomem; | |
1141 | ||
1142 | sense = (struct tape_3590_sense *) irb->ecw; | |
1143 | /* Exception Message */ | |
1144 | switch (sense->fmt.f71.emc) { | |
1145 | case 0x01: | |
1146 | snprintf(exception, BUFSIZE, "Effect of failure is unknown"); | |
1147 | break; | |
1148 | case 0x02: | |
1149 | snprintf(exception, BUFSIZE, "DV Exception - no performance" | |
1150 | " impact"); | |
1151 | break; | |
1152 | case 0x03: | |
1153 | snprintf(exception, BUFSIZE, "DV Exception on channel " | |
1154 | "interface 0x%02x", sense->fmt.f71.md[0]); | |
1155 | break; | |
1156 | case 0x04: | |
1157 | snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", | |
1158 | sense->fmt.f71.md[0]); | |
1159 | break; | |
1160 | case 0x05: | |
1161 | snprintf(exception, BUFSIZE, "DV Exception on message display" | |
1162 | " 0x%02x", sense->fmt.f71.md[0]); | |
1163 | break; | |
1164 | case 0x06: | |
1165 | snprintf(exception, BUFSIZE, "DV Exception in tape path"); | |
1166 | break; | |
1167 | case 0x07: | |
1168 | snprintf(exception, BUFSIZE, "DV Exception in drive"); | |
1169 | break; | |
1170 | default: | |
1171 | snprintf(exception, BUFSIZE, "0x%02x", | |
1172 | sense->fmt.f71.emc); | |
1173 | } | |
1174 | /* Service Message */ | |
1175 | switch (sense->fmt.f71.smc) { | |
1176 | case 0x01: | |
1177 | snprintf(service, BUFSIZE, "Repair impact is unknown"); | |
1178 | break; | |
1179 | case 0x02: | |
1180 | snprintf(service, BUFSIZE, "Repair will not impact device " | |
1181 | "performance"); | |
1182 | break; | |
1183 | case 0x03: | |
1184 | if (sense->fmt.f71.mdf == 0) | |
1185 | snprintf(service, BUFSIZE, "Repair will disable " | |
1186 | "channel path 0x%x on DV", | |
1187 | sense->fmt.f71.md[1]); | |
1188 | else | |
1189 | snprintf(service, BUFSIZE, "Repair will disable " | |
1190 | "channel path (0x%x-0x%x) on DV", | |
1191 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
1192 | break; | |
1193 | case 0x04: | |
1194 | if (sense->fmt.f71.mdf == 0) | |
1195 | snprintf(service, BUFSIZE, "Repair will disable " | |
1196 | "interface 0x%x on DV", sense->fmt.f71.md[1]); | |
1197 | else | |
1198 | snprintf(service, BUFSIZE, "Repair will disable " | |
1199 | "interfaces (0x%x-0x%x) on DV", | |
1200 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
1201 | break; | |
1202 | case 0x05: | |
1203 | if (sense->fmt.f71.mdf == 0) | |
1204 | snprintf(service, BUFSIZE, "Repair will disable loader" | |
1205 | " 0x%x on DV", sense->fmt.f71.md[1]); | |
1206 | else | |
1207 | snprintf(service, BUFSIZE, "Repair will disable loader" | |
1208 | " (0x%x-0x%x) on DV", | |
1209 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
1210 | break; | |
1211 | case 0x07: | |
1212 | snprintf(service, BUFSIZE, "Repair will disable access to DV"); | |
1213 | break; | |
1214 | case 0x08: | |
1215 | if (sense->fmt.f71.mdf == 0) | |
1216 | snprintf(service, BUFSIZE, "Repair will disable " | |
1217 | "message display 0x%x on DV", | |
1218 | sense->fmt.f71.md[1]); | |
1219 | else | |
1220 | snprintf(service, BUFSIZE, "Repair will disable " | |
1221 | "message displays (0x%x-0x%x) on DV", | |
1222 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
1223 | break; | |
1224 | case 0x09: | |
1225 | snprintf(service, BUFSIZE, "Clean DV"); | |
1226 | break; | |
1227 | default: | |
1228 | snprintf(service, BUFSIZE, "0x%02x", | |
1229 | sense->fmt.f71.smc); | |
1230 | } | |
1231 | ||
1232 | dev_warn (&device->cdev->dev, "Device subsystem information: exception" | |
1233 | " %s, service %s\n", exception, service); | |
1234 | out_nomem: | |
1235 | kfree(exception); | |
1236 | kfree(service); | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * Print standard ERA Message | |
1241 | */ | |
1242 | static void | |
1243 | tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) | |
1244 | { | |
1245 | struct tape_3590_sense *sense; | |
1246 | ||
1247 | sense = (struct tape_3590_sense *) irb->ecw; | |
1248 | if (sense->mc == 0) | |
1249 | return; | |
1250 | if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { | |
1251 | if (tape_3590_msg[sense->mc] != NULL) | |
1252 | dev_warn (&device->cdev->dev, "The tape unit has " | |
1253 | "issued sense message %s\n", | |
1254 | tape_3590_msg[sense->mc]); | |
1255 | else | |
1256 | dev_warn (&device->cdev->dev, "The tape unit has " | |
1257 | "issued an unknown sense message code 0x%x\n", | |
1258 | sense->mc); | |
1259 | return; | |
1260 | } | |
1261 | if (sense->mc == 0xf0) { | |
1262 | /* Standard Media Information Message */ | |
1263 | dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " | |
1264 | "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, | |
1265 | sense->fmt.f70.emc, sense->fmt.f70.smc, | |
1266 | sense->fmt.f70.refcode, sense->fmt.f70.mid, | |
1267 | sense->fmt.f70.fid); | |
1268 | tape_3590_print_mim_msg_f0(device, irb); | |
1269 | return; | |
1270 | } | |
1271 | if (sense->mc == 0xf1) { | |
1272 | /* Standard I/O Subsystem Service Information Message */ | |
1273 | dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," | |
1274 | " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", | |
1275 | sense->fmt.f71.sev, device->cdev->id.dev_model, | |
1276 | sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, | |
1277 | sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, | |
1278 | sense->fmt.f71.refcode3); | |
1279 | tape_3590_print_io_sim_msg_f1(device, irb); | |
1280 | return; | |
1281 | } | |
1282 | if (sense->mc == 0xf2) { | |
1283 | /* Standard Device Service Information Message */ | |
1284 | dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" | |
1285 | ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", | |
1286 | sense->fmt.f71.sev, device->cdev->id.dev_model, | |
1287 | sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, | |
1288 | sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, | |
1289 | sense->fmt.f71.refcode3); | |
1290 | tape_3590_print_dev_sim_msg_f2(device, irb); | |
1291 | return; | |
1292 | } | |
1293 | if (sense->mc == 0xf3) { | |
1294 | /* Standard Library Service Information Message */ | |
1295 | return; | |
1296 | } | |
1297 | dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " | |
1298 | "sense message code %x\n", sense->mc); | |
1299 | } | |
1300 | ||
1301 | static int tape_3590_crypt_error(struct tape_device *device, | |
1302 | struct tape_request *request, struct irb *irb) | |
1303 | { | |
1304 | u8 cu_rc; | |
1305 | u16 ekm_rc2; | |
1306 | char *sense; | |
1307 | ||
1308 | sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; | |
1309 | cu_rc = sense[0]; | |
1310 | ekm_rc2 = *((u16*) &sense[10]); | |
1311 | if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) | |
1312 | /* key not defined on EKM */ | |
1313 | return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); | |
1314 | if ((cu_rc == 1) || (cu_rc == 2)) | |
1315 | /* No connection to EKM */ | |
1316 | return tape_3590_erp_basic(device, request, irb, -ENOTCONN); | |
1317 | ||
1318 | dev_err (&device->cdev->dev, "The tape unit failed to obtain the " | |
1319 | "encryption key from EKM\n"); | |
1320 | ||
1321 | return tape_3590_erp_basic(device, request, irb, -ENOKEY); | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * 3590 error Recovery routine: | |
1326 | * If possible, it tries to recover from the error. If this is not possible, | |
1327 | * inform the user about the problem. | |
1328 | */ | |
1329 | static int | |
1330 | tape_3590_unit_check(struct tape_device *device, struct tape_request *request, | |
1331 | struct irb *irb) | |
1332 | { | |
1333 | struct tape_3590_sense *sense; | |
1334 | ||
1335 | sense = (struct tape_3590_sense *) irb->ecw; | |
1336 | ||
1337 | DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); | |
1338 | ||
1339 | /* | |
1340 | * First check all RC-QRCs where we want to do something special | |
1341 | * - "break": basic error recovery is done | |
1342 | * - "goto out:": just print error message if available | |
1343 | */ | |
1344 | switch (sense->rc_rqc) { | |
1345 | ||
1346 | case 0x1110: | |
1347 | tape_3590_print_era_msg(device, irb); | |
1348 | return tape_3590_erp_read_buf_log(device, request, irb); | |
1349 | ||
1350 | case 0x2011: | |
1351 | tape_3590_print_era_msg(device, irb); | |
1352 | return tape_3590_erp_read_alternate(device, request, irb); | |
1353 | ||
1354 | case 0x2230: | |
1355 | case 0x2231: | |
1356 | tape_3590_print_era_msg(device, irb); | |
1357 | return tape_3590_erp_special_interrupt(device, request, irb); | |
1358 | case 0x2240: | |
1359 | return tape_3590_crypt_error(device, request, irb); | |
1360 | ||
1361 | case 0x3010: | |
1362 | DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", | |
1363 | device->cdev_id); | |
1364 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1365 | case 0x3012: | |
1366 | DBF_EVENT(2, "(%08x): Forward at End of Partition\n", | |
1367 | device->cdev_id); | |
1368 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1369 | case 0x3020: | |
1370 | DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); | |
1371 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1372 | ||
1373 | case 0x3122: | |
1374 | DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", | |
1375 | device->cdev_id); | |
1376 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1377 | case 0x3123: | |
1378 | DBF_EVENT(2, "(%08x): Rewind Unload complete\n", | |
1379 | device->cdev_id); | |
1380 | tape_med_state_set(device, MS_UNLOADED); | |
1381 | tape_3590_schedule_work(device, TO_CRYPT_OFF); | |
1382 | return tape_3590_erp_basic(device, request, irb, 0); | |
1383 | ||
1384 | case 0x4010: | |
1385 | /* | |
1386 | * print additional msg since default msg | |
1387 | * "device intervention" is not very meaningfull | |
1388 | */ | |
1389 | tape_med_state_set(device, MS_UNLOADED); | |
1390 | tape_3590_schedule_work(device, TO_CRYPT_OFF); | |
1391 | return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); | |
1392 | case 0x4012: /* Device Long Busy */ | |
1393 | /* XXX: Also use long busy handling here? */ | |
1394 | DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); | |
1395 | tape_3590_print_era_msg(device, irb); | |
1396 | return tape_3590_erp_basic(device, request, irb, -EBUSY); | |
1397 | case 0x4014: | |
1398 | DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); | |
1399 | return tape_3590_erp_long_busy(device, request, irb); | |
1400 | ||
1401 | case 0x5010: | |
1402 | if (sense->rac == 0xd0) { | |
1403 | /* Swap */ | |
1404 | tape_3590_print_era_msg(device, irb); | |
1405 | return tape_3590_erp_swap(device, request, irb); | |
1406 | } | |
1407 | if (sense->rac == 0x26) { | |
1408 | /* Read Opposite */ | |
1409 | tape_3590_print_era_msg(device, irb); | |
1410 | return tape_3590_erp_read_opposite(device, request, | |
1411 | irb); | |
1412 | } | |
1413 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1414 | case 0x5020: | |
1415 | case 0x5021: | |
1416 | case 0x5022: | |
1417 | case 0x5040: | |
1418 | case 0x5041: | |
1419 | case 0x5042: | |
1420 | tape_3590_print_era_msg(device, irb); | |
1421 | return tape_3590_erp_swap(device, request, irb); | |
1422 | ||
1423 | case 0x5110: | |
1424 | case 0x5111: | |
1425 | return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); | |
1426 | ||
1427 | case 0x5120: | |
1428 | case 0x1120: | |
1429 | tape_med_state_set(device, MS_UNLOADED); | |
1430 | tape_3590_schedule_work(device, TO_CRYPT_OFF); | |
1431 | return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); | |
1432 | ||
1433 | case 0x6020: | |
1434 | return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); | |
1435 | ||
1436 | case 0x8011: | |
1437 | return tape_3590_erp_basic(device, request, irb, -EPERM); | |
1438 | case 0x8013: | |
1439 | dev_warn (&device->cdev->dev, "A different host has privileged" | |
1440 | " access to the tape unit\n"); | |
1441 | return tape_3590_erp_basic(device, request, irb, -EPERM); | |
1442 | default: | |
1443 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1444 | } | |
1445 | } | |
1446 | ||
1447 | /* | |
1448 | * 3590 interrupt handler: | |
1449 | */ | |
1450 | static int | |
1451 | tape_3590_irq(struct tape_device *device, struct tape_request *request, | |
1452 | struct irb *irb) | |
1453 | { | |
1454 | if (request == NULL) | |
1455 | return tape_3590_unsolicited_irq(device, irb); | |
1456 | ||
1457 | if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && | |
1458 | (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && | |
1459 | (request->op == TO_WRI)) { | |
1460 | /* Write at end of volume */ | |
1461 | DBF_EVENT(2, "End of volume\n"); | |
1462 | return tape_3590_erp_failed(device, request, irb, -ENOSPC); | |
1463 | } | |
1464 | ||
1465 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) | |
1466 | return tape_3590_unit_check(device, request, irb); | |
1467 | ||
1468 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { | |
1469 | if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { | |
1470 | if (request->op == TO_FSB || request->op == TO_BSB) | |
1471 | request->rescnt++; | |
1472 | else | |
1473 | DBF_EVENT(5, "Unit Exception!\n"); | |
1474 | } | |
1475 | ||
1476 | return tape_3590_done(device, request); | |
1477 | } | |
1478 | ||
1479 | if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { | |
1480 | DBF_EVENT(2, "channel end\n"); | |
1481 | return TAPE_IO_PENDING; | |
1482 | } | |
1483 | ||
1484 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { | |
1485 | DBF_EVENT(2, "Unit Attention when busy..\n"); | |
1486 | return TAPE_IO_PENDING; | |
1487 | } | |
1488 | ||
1489 | DBF_EVENT(6, "xunknownirq\n"); | |
1490 | tape_dump_sense_dbf(device, request, irb); | |
1491 | return TAPE_IO_STOP; | |
1492 | } | |
1493 | ||
1494 | ||
1495 | static int tape_3590_read_dev_chars(struct tape_device *device, | |
1496 | struct tape_3590_rdc_data *rdc_data) | |
1497 | { | |
1498 | int rc; | |
1499 | struct tape_request *request; | |
1500 | ||
1501 | request = tape_alloc_request(1, sizeof(*rdc_data)); | |
1502 | if (IS_ERR(request)) | |
1503 | return PTR_ERR(request); | |
1504 | request->op = TO_RDC; | |
1505 | tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), | |
1506 | request->cpdata); | |
1507 | rc = tape_do_io(device, request); | |
1508 | if (rc == 0) | |
1509 | memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); | |
1510 | tape_free_request(request); | |
1511 | return rc; | |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * Setup device function | |
1516 | */ | |
1517 | static int | |
1518 | tape_3590_setup_device(struct tape_device *device) | |
1519 | { | |
1520 | int rc; | |
1521 | struct tape_3590_disc_data *data; | |
1522 | struct tape_3590_rdc_data *rdc_data; | |
1523 | ||
1524 | DBF_EVENT(6, "3590 device setup\n"); | |
1525 | data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); | |
1526 | if (data == NULL) | |
1527 | return -ENOMEM; | |
1528 | data->read_back_op = READ_PREVIOUS; | |
1529 | device->discdata = data; | |
1530 | ||
1531 | rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); | |
1532 | if (!rdc_data) { | |
1533 | rc = -ENOMEM; | |
1534 | goto fail_kmalloc; | |
1535 | } | |
1536 | rc = tape_3590_read_dev_chars(device, rdc_data); | |
1537 | if (rc) { | |
1538 | DBF_LH(3, "Read device characteristics failed!\n"); | |
1539 | goto fail_rdc_data; | |
1540 | } | |
1541 | rc = tape_std_assign(device); | |
1542 | if (rc) | |
1543 | goto fail_rdc_data; | |
1544 | if (rdc_data->data[31] == 0x13) { | |
1545 | data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; | |
1546 | tape_3592_disable_crypt(device); | |
1547 | } else { | |
1548 | DBF_EVENT(6, "Device has NO crypto support\n"); | |
1549 | } | |
1550 | /* Try to find out if medium is loaded */ | |
1551 | rc = tape_3590_sense_medium(device); | |
1552 | if (rc) { | |
1553 | DBF_LH(3, "3590 medium sense returned %d\n", rc); | |
1554 | goto fail_rdc_data; | |
1555 | } | |
1556 | return 0; | |
1557 | ||
1558 | fail_rdc_data: | |
1559 | kfree(rdc_data); | |
1560 | fail_kmalloc: | |
1561 | kfree(data); | |
1562 | return rc; | |
1563 | } | |
1564 | ||
1565 | /* | |
1566 | * Cleanup device function | |
1567 | */ | |
1568 | static void | |
1569 | tape_3590_cleanup_device(struct tape_device *device) | |
1570 | { | |
1571 | flush_workqueue(tape_3590_wq); | |
1572 | tape_std_unassign(device); | |
1573 | ||
1574 | kfree(device->discdata); | |
1575 | device->discdata = NULL; | |
1576 | } | |
1577 | ||
1578 | /* | |
1579 | * List of 3590 magnetic tape commands. | |
1580 | */ | |
1581 | static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { | |
1582 | [MTRESET] = tape_std_mtreset, | |
1583 | [MTFSF] = tape_std_mtfsf, | |
1584 | [MTBSF] = tape_std_mtbsf, | |
1585 | [MTFSR] = tape_std_mtfsr, | |
1586 | [MTBSR] = tape_std_mtbsr, | |
1587 | [MTWEOF] = tape_std_mtweof, | |
1588 | [MTREW] = tape_std_mtrew, | |
1589 | [MTOFFL] = tape_std_mtoffl, | |
1590 | [MTNOP] = tape_std_mtnop, | |
1591 | [MTRETEN] = tape_std_mtreten, | |
1592 | [MTBSFM] = tape_std_mtbsfm, | |
1593 | [MTFSFM] = tape_std_mtfsfm, | |
1594 | [MTEOM] = tape_std_mteom, | |
1595 | [MTERASE] = tape_std_mterase, | |
1596 | [MTRAS1] = NULL, | |
1597 | [MTRAS2] = NULL, | |
1598 | [MTRAS3] = NULL, | |
1599 | [MTSETBLK] = tape_std_mtsetblk, | |
1600 | [MTSETDENSITY] = NULL, | |
1601 | [MTSEEK] = tape_3590_mtseek, | |
1602 | [MTTELL] = tape_3590_mttell, | |
1603 | [MTSETDRVBUFFER] = NULL, | |
1604 | [MTFSS] = NULL, | |
1605 | [MTBSS] = NULL, | |
1606 | [MTWSM] = NULL, | |
1607 | [MTLOCK] = NULL, | |
1608 | [MTUNLOCK] = NULL, | |
1609 | [MTLOAD] = tape_std_mtload, | |
1610 | [MTUNLOAD] = tape_std_mtunload, | |
1611 | [MTCOMPRESSION] = tape_std_mtcompression, | |
1612 | [MTSETPART] = NULL, | |
1613 | [MTMKPART] = NULL | |
1614 | }; | |
1615 | ||
1616 | /* | |
1617 | * Tape discipline structure for 3590. | |
1618 | */ | |
1619 | static struct tape_discipline tape_discipline_3590 = { | |
1620 | .owner = THIS_MODULE, | |
1621 | .setup_device = tape_3590_setup_device, | |
1622 | .cleanup_device = tape_3590_cleanup_device, | |
1623 | .process_eov = tape_std_process_eov, | |
1624 | .irq = tape_3590_irq, | |
1625 | .read_block = tape_std_read_block, | |
1626 | .write_block = tape_std_write_block, | |
1627 | .ioctl_fn = tape_3590_ioctl, | |
1628 | .mtop_array = tape_3590_mtop | |
1629 | }; | |
1630 | ||
1631 | static struct ccw_device_id tape_3590_ids[] = { | |
1632 | {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, | |
1633 | {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, | |
1634 | { /* end of list */ } | |
1635 | }; | |
1636 | ||
1637 | static int | |
1638 | tape_3590_online(struct ccw_device *cdev) | |
1639 | { | |
1640 | return tape_generic_online(dev_get_drvdata(&cdev->dev), | |
1641 | &tape_discipline_3590); | |
1642 | } | |
1643 | ||
1644 | static struct ccw_driver tape_3590_driver = { | |
1645 | .driver = { | |
1646 | .name = "tape_3590", | |
1647 | .owner = THIS_MODULE, | |
1648 | }, | |
1649 | .ids = tape_3590_ids, | |
1650 | .probe = tape_generic_probe, | |
1651 | .remove = tape_generic_remove, | |
1652 | .set_offline = tape_generic_offline, | |
1653 | .set_online = tape_3590_online, | |
1654 | .freeze = tape_generic_pm_suspend, | |
1655 | .int_class = IRQIO_TAP, | |
1656 | }; | |
1657 | ||
1658 | /* | |
1659 | * Setup discipline structure. | |
1660 | */ | |
1661 | static int | |
1662 | tape_3590_init(void) | |
1663 | { | |
1664 | int rc; | |
1665 | ||
1666 | TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); | |
1667 | debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); | |
1668 | #ifdef DBF_LIKE_HELL | |
1669 | debug_set_level(TAPE_DBF_AREA, 6); | |
1670 | #endif | |
1671 | ||
1672 | DBF_EVENT(3, "3590 init\n"); | |
1673 | ||
1674 | tape_3590_wq = alloc_workqueue("tape_3590", 0, 0); | |
1675 | if (!tape_3590_wq) | |
1676 | return -ENOMEM; | |
1677 | ||
1678 | /* Register driver for 3590 tapes. */ | |
1679 | rc = ccw_driver_register(&tape_3590_driver); | |
1680 | if (rc) { | |
1681 | destroy_workqueue(tape_3590_wq); | |
1682 | DBF_EVENT(3, "3590 init failed\n"); | |
1683 | } else | |
1684 | DBF_EVENT(3, "3590 registered\n"); | |
1685 | return rc; | |
1686 | } | |
1687 | ||
1688 | static void | |
1689 | tape_3590_exit(void) | |
1690 | { | |
1691 | ccw_driver_unregister(&tape_3590_driver); | |
1692 | destroy_workqueue(tape_3590_wq); | |
1693 | debug_unregister(TAPE_DBF_AREA); | |
1694 | } | |
1695 | ||
1696 | MODULE_DEVICE_TABLE(ccw, tape_3590_ids); | |
1697 | MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); | |
1698 | MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); | |
1699 | MODULE_LICENSE("GPL"); | |
1700 | ||
1701 | module_init(tape_3590_init); | |
1702 | module_exit(tape_3590_exit); |