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 len; |
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 | len = min(sizeof(out->label), strlen(in->label)); |
124 | memcpy(out->label, in->label, len); |
125 | memset(out->label + len, ' ', sizeof(out->label) - len); |
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: &in->kekl[0], out: &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: &in->kekl[0], out: &out->kekl[0]); |
160 | int_to_ext_kekl(in: &in->kekl[1], out: &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(kekl: &kekls->kekl[0])) |
189 | goto invalid; |
190 | if (check_ext_kekl(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(size: sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); |
211 | if (!int_kekls) |
212 | return -ENOMEM; |
213 | request = tape_alloc_request(cplength: 2, datasize: sizeof(*order)); |
214 | if (IS_ERR(ptr: request)) { |
215 | rc = PTR_ERR(ptr: 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(ccw: request->cpaddr, PERF_SUBSYS_FUNC, memsize: sizeof(*order), cda: order); |
224 | tape_ccw_end(ccw: request->cpaddr + 1, READ_SS_DATA, memsize: sizeof(*int_kekls), |
225 | cda: int_kekls); |
226 | rc = tape_do_io(device, request); |
227 | if (rc) |
228 | goto fail_request; |
229 | int_to_ext_kekl_pair(in: &int_kekls->kekls, out: ext_kekls); |
230 | |
231 | rc = 0; |
232 | fail_request: |
233 | tape_free_request(request); |
234 | fail_malloc: |
235 | kfree(objp: 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(objp: 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(kekls: ext_kekls)) { |
282 | DBF_EVENT(6, "invalid kekls\n" ); |
283 | return -EINVAL; |
284 | } |
285 | if (tape_3590_mttell(device, mt_count: 0) != 0) |
286 | return -EBADSLT; |
287 | request = tape_alloc_request(cplength: 1, datasize: sizeof(*order)); |
288 | if (IS_ERR(ptr: request)) |
289 | return PTR_ERR(ptr: 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(in: &ext_kekls->kekl[0], out: &order->kekls.kekl[0]); |
295 | ext_to_int_kekl(in: &ext_kekls->kekl[1], out: &order->kekls.kekl[1]); |
296 | request->op = TO_KEKL_SET; |
297 | tape_ccw_end(ccw: request->cpaddr, PERF_SUBSYS_FUNC, memsize: sizeof(*order), cda: 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(ptr: ext_kekls)) |
318 | return PTR_ERR(ptr: ext_kekls); |
319 | rc = tape_3592_kekl_set(device, ext_kekls); |
320 | kfree(objp: 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(error: -ENOSYS); |
335 | request = tape_alloc_request(cplength: 2, datasize: 72); |
336 | if (IS_ERR(ptr: 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(ccw: request->cpaddr, MODE_SET_CB, memsize: 36, cda: data); |
351 | tape_ccw_end(ccw: request->cpaddr + 1, MODE_SET_CB, memsize: 36, cda: 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(ptr: request)) |
361 | return PTR_ERR(ptr: 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(ptr: 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(error: -ENOSYS); |
385 | request = tape_alloc_request(cplength: 2, datasize: 72); |
386 | if (IS_ERR(ptr: 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(ccw: request->cpaddr, MODE_SET_CB, memsize: 36, cda: data); |
398 | tape_ccw_end(ccw: request->cpaddr + 1, MODE_SET_CB, memsize: 36, cda: 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(ptr: request)) |
409 | return PTR_ERR(ptr: 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(ptr: 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(to: &info, from: (char __user *)arg, n: 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(to: (char __user *) arg, from: &TAPE_3590_CRYPT_INFO(device), |
456 | n: 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(to: &disp, from: (char __user *) arg, n: sizeof(disp))) |
473 | return -EFAULT; |
474 | |
475 | return tape_std_display(device, disp: &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(cplength: 1, datasize: 128); |
498 | if (IS_ERR(ptr: request)) |
499 | return PTR_ERR(ptr: request); |
500 | request->op = TO_MSEN; |
501 | tape_ccw_end(ccw: request->cpaddr, MEDIUM_SENSE, memsize: 128, cda: 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(cplength: 1, datasize: 128); |
510 | if (IS_ERR(ptr: request)) |
511 | return; |
512 | request->op = TO_MSEN; |
513 | tape_ccw_end(ccw: request->cpaddr, MEDIUM_SENSE, memsize: 128, cda: 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, id: &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(cplength: 3, datasize: 4); |
542 | if (IS_ERR(ptr: request)) |
543 | return PTR_ERR(ptr: request); |
544 | request->op = TO_LBL; |
545 | tape_ccw_cc(ccw: request->cpaddr, MODE_SET_DB, memsize: 1, cda: device->modeset_byte); |
546 | *(__u32 *) request->cpdata = count; |
547 | tape_ccw_cc(ccw: request->cpaddr + 1, LOCATE, memsize: 4, cda: request->cpdata); |
548 | tape_ccw_end(ccw: request->cpaddr + 2, NOP, memsize: 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(ccw: request->cpaddr, MODE_SET_DB, memsize: 1, cda: device->modeset_byte); |
569 | data = device->discdata; |
570 | tape_ccw_cc_idal(ccw: request->cpaddr + 1, cmd_code: data->read_back_op, |
571 | idal: device->char_data.idal_buf); |
572 | tape_ccw_cc(ccw: request->cpaddr + 2, FORSPACEBLOCK, memsize: 0, NULL); |
573 | tape_ccw_end(ccw: request->cpaddr + 3, NOP, memsize: 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(cplength: 3, datasize: 4096); |
599 | if (IS_ERR(ptr: 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(ccw: request->cpaddr, PERFORM_SS_FUNC, memsize: 12, cda: buf); |
606 | tape_ccw_cc(ccw: request->cpaddr + 1, READ_SS_DATA, memsize: 4096 - 12, cda: buf + 12); |
607 | tape_ccw_end(ccw: request->cpaddr + 2, NOP, memsize: 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(device: p->device); |
633 | break; |
634 | case TO_READ_ATTMSG: |
635 | tape_3590_read_attmsg_async(device: p->device); |
636 | break; |
637 | case TO_CRYPT_ON: |
638 | tape_3592_enable_crypt_async(device: p->device); |
639 | break; |
640 | case TO_CRYPT_OFF: |
641 | tape_3592_disable_crypt_async(device: 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(objp: 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(size: 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(wq: tape_3590_wq, work: &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, op: TO_CRYPT_OFF); |
730 | break; |
731 | case TO_MSEN: |
732 | tape_3590_med_state_set(device, sense: 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_succeeded(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, op: 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, op: 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_succeeded(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, rc: -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, rc: -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, rc: -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, rc: -EIO); |
946 | break; |
947 | default: |
948 | return tape_3590_erp_failed(device, request, irb, rc: -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(buf: exception, BUFSIZE, fmt: "Data degraded" ); |
972 | break; |
973 | case 0x03: |
974 | snprintf(buf: exception, BUFSIZE, fmt: "Data degraded in partition %i" , |
975 | sense->fmt.f70.mp); |
976 | break; |
977 | case 0x04: |
978 | snprintf(buf: exception, BUFSIZE, fmt: "Medium degraded" ); |
979 | break; |
980 | case 0x05: |
981 | snprintf(buf: exception, BUFSIZE, fmt: "Medium degraded in partition %i" , |
982 | sense->fmt.f70.mp); |
983 | break; |
984 | case 0x06: |
985 | snprintf(buf: exception, BUFSIZE, fmt: "Block 0 Error" ); |
986 | break; |
987 | case 0x07: |
988 | snprintf(buf: exception, BUFSIZE, fmt: "Medium Exception 0x%02x" , |
989 | sense->fmt.f70.md); |
990 | break; |
991 | default: |
992 | snprintf(buf: exception, BUFSIZE, fmt: "0x%02x" , |
993 | sense->fmt.f70.emc); |
994 | break; |
995 | } |
996 | /* Service Message */ |
997 | switch (sense->fmt.f70.smc) { |
998 | case 0x02: |
999 | snprintf(buf: service, BUFSIZE, fmt: "Reference Media maintenance " |
1000 | "procedure %i" , sense->fmt.f70.md); |
1001 | break; |
1002 | default: |
1003 | snprintf(buf: service, BUFSIZE, fmt: "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(objp: exception); |
1013 | kfree(objp: 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(buf: exception, BUFSIZE, fmt: "Effect of failure is unknown" ); |
1036 | break; |
1037 | case 0x02: |
1038 | snprintf(buf: exception, BUFSIZE, fmt: "CU Exception - no performance " |
1039 | "impact" ); |
1040 | break; |
1041 | case 0x03: |
1042 | snprintf(buf: exception, BUFSIZE, fmt: "CU Exception on channel " |
1043 | "interface 0x%02x" , sense->fmt.f71.md[0]); |
1044 | break; |
1045 | case 0x04: |
1046 | snprintf(buf: exception, BUFSIZE, fmt: "CU Exception on device path " |
1047 | "0x%02x" , sense->fmt.f71.md[0]); |
1048 | break; |
1049 | case 0x05: |
1050 | snprintf(buf: exception, BUFSIZE, fmt: "CU Exception on library path " |
1051 | "0x%02x" , sense->fmt.f71.md[0]); |
1052 | break; |
1053 | case 0x06: |
1054 | snprintf(buf: exception, BUFSIZE, fmt: "CU Exception on node 0x%02x" , |
1055 | sense->fmt.f71.md[0]); |
1056 | break; |
1057 | case 0x07: |
1058 | snprintf(buf: exception, BUFSIZE, fmt: "CU Exception on partition " |
1059 | "0x%02x" , sense->fmt.f71.md[0]); |
1060 | break; |
1061 | default: |
1062 | snprintf(buf: exception, BUFSIZE, fmt: "0x%02x" , |
1063 | sense->fmt.f71.emc); |
1064 | } |
1065 | /* Service Message */ |
1066 | switch (sense->fmt.f71.smc) { |
1067 | case 0x01: |
1068 | snprintf(buf: service, BUFSIZE, fmt: "Repair impact is unknown" ); |
1069 | break; |
1070 | case 0x02: |
1071 | snprintf(buf: service, BUFSIZE, fmt: "Repair will not impact cu " |
1072 | "performance" ); |
1073 | break; |
1074 | case 0x03: |
1075 | if (sense->fmt.f71.mdf == 0) |
1076 | snprintf(buf: service, BUFSIZE, fmt: "Repair will disable node " |
1077 | "0x%x on CU" , sense->fmt.f71.md[1]); |
1078 | else |
1079 | snprintf(buf: service, BUFSIZE, fmt: "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(buf: service, BUFSIZE, fmt: "Repair will disable " |
1086 | "channel path 0x%x on CU" , |
1087 | sense->fmt.f71.md[1]); |
1088 | else |
1089 | snprintf(buf: service, BUFSIZE, fmt: "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(buf: service, BUFSIZE, fmt: "Repair will disable device" |
1096 | " path 0x%x on CU" , sense->fmt.f71.md[1]); |
1097 | else |
1098 | snprintf(buf: service, BUFSIZE, fmt: "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(buf: service, BUFSIZE, fmt: "Repair will disable " |
1105 | "library path 0x%x on CU" , |
1106 | sense->fmt.f71.md[1]); |
1107 | else |
1108 | snprintf(buf: service, BUFSIZE, fmt: "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(buf: service, BUFSIZE, fmt: "Repair will disable access to CU" ); |
1114 | break; |
1115 | default: |
1116 | snprintf(buf: service, BUFSIZE, fmt: "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(objp: exception); |
1124 | kfree(objp: 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(buf: exception, BUFSIZE, fmt: "Effect of failure is unknown" ); |
1147 | break; |
1148 | case 0x02: |
1149 | snprintf(buf: exception, BUFSIZE, fmt: "DV Exception - no performance" |
1150 | " impact" ); |
1151 | break; |
1152 | case 0x03: |
1153 | snprintf(buf: exception, BUFSIZE, fmt: "DV Exception on channel " |
1154 | "interface 0x%02x" , sense->fmt.f71.md[0]); |
1155 | break; |
1156 | case 0x04: |
1157 | snprintf(buf: exception, BUFSIZE, fmt: "DV Exception on loader 0x%02x" , |
1158 | sense->fmt.f71.md[0]); |
1159 | break; |
1160 | case 0x05: |
1161 | snprintf(buf: exception, BUFSIZE, fmt: "DV Exception on message display" |
1162 | " 0x%02x" , sense->fmt.f71.md[0]); |
1163 | break; |
1164 | case 0x06: |
1165 | snprintf(buf: exception, BUFSIZE, fmt: "DV Exception in tape path" ); |
1166 | break; |
1167 | case 0x07: |
1168 | snprintf(buf: exception, BUFSIZE, fmt: "DV Exception in drive" ); |
1169 | break; |
1170 | default: |
1171 | snprintf(buf: exception, BUFSIZE, fmt: "0x%02x" , |
1172 | sense->fmt.f71.emc); |
1173 | } |
1174 | /* Service Message */ |
1175 | switch (sense->fmt.f71.smc) { |
1176 | case 0x01: |
1177 | snprintf(buf: service, BUFSIZE, fmt: "Repair impact is unknown" ); |
1178 | break; |
1179 | case 0x02: |
1180 | snprintf(buf: service, BUFSIZE, fmt: "Repair will not impact device " |
1181 | "performance" ); |
1182 | break; |
1183 | case 0x03: |
1184 | if (sense->fmt.f71.mdf == 0) |
1185 | snprintf(buf: service, BUFSIZE, fmt: "Repair will disable " |
1186 | "channel path 0x%x on DV" , |
1187 | sense->fmt.f71.md[1]); |
1188 | else |
1189 | snprintf(buf: service, BUFSIZE, fmt: "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(buf: service, BUFSIZE, fmt: "Repair will disable " |
1196 | "interface 0x%x on DV" , sense->fmt.f71.md[1]); |
1197 | else |
1198 | snprintf(buf: service, BUFSIZE, fmt: "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(buf: service, BUFSIZE, fmt: "Repair will disable loader" |
1205 | " 0x%x on DV" , sense->fmt.f71.md[1]); |
1206 | else |
1207 | snprintf(buf: service, BUFSIZE, fmt: "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(buf: service, BUFSIZE, fmt: "Repair will disable access to DV" ); |
1213 | break; |
1214 | case 0x08: |
1215 | if (sense->fmt.f71.mdf == 0) |
1216 | snprintf(buf: service, BUFSIZE, fmt: "Repair will disable " |
1217 | "message display 0x%x on DV" , |
1218 | sense->fmt.f71.md[1]); |
1219 | else |
1220 | snprintf(buf: service, BUFSIZE, fmt: "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(buf: service, BUFSIZE, fmt: "Clean DV" ); |
1226 | break; |
1227 | default: |
1228 | snprintf(buf: service, BUFSIZE, fmt: "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(objp: exception); |
1236 | kfree(objp: 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, rc: -EKEYREJECTED); |
1314 | if ((cu_rc == 1) || (cu_rc == 2)) |
1315 | /* No connection to EKM */ |
1316 | return tape_3590_erp_basic(device, request, irb, rc: -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, rc: -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, rc: -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, rc: -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, rc: -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, rc: -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, op: TO_CRYPT_OFF); |
1382 | return tape_3590_erp_basic(device, request, irb, rc: 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, op: TO_CRYPT_OFF); |
1391 | return tape_3590_erp_basic(device, request, irb, rc: -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, rc: -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, rc: -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, rc: -EMEDIUMTYPE); |
1426 | |
1427 | case 0x5120: |
1428 | case 0x1120: |
1429 | tape_med_state_set(device, MS_UNLOADED); |
1430 | tape_3590_schedule_work(device, op: TO_CRYPT_OFF); |
1431 | return tape_3590_erp_basic(device, request, irb, rc: -ENOMEDIUM); |
1432 | |
1433 | case 0x6020: |
1434 | return tape_3590_erp_basic(device, request, irb, rc: -EMEDIUMTYPE); |
1435 | |
1436 | case 0x8011: |
1437 | return tape_3590_erp_basic(device, request, irb, rc: -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, rc: -EPERM); |
1442 | default: |
1443 | return tape_3590_erp_basic(device, request, irb, rc: -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, rc: -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(cplength: 1, datasize: sizeof(*rdc_data)); |
1502 | if (IS_ERR(ptr: request)) |
1503 | return PTR_ERR(ptr: 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(size: 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(size: 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(objp: rdc_data); |
1560 | fail_kmalloc: |
1561 | kfree(objp: 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(objp: 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(dev: &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 | .int_class = IRQIO_TAP, |
1655 | }; |
1656 | |
1657 | /* |
1658 | * Setup discipline structure. |
1659 | */ |
1660 | static int |
1661 | tape_3590_init(void) |
1662 | { |
1663 | int rc; |
1664 | |
1665 | TAPE_DBF_AREA = debug_register("tape_3590" , 2, 2, 4 * sizeof(long)); |
1666 | debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); |
1667 | #ifdef DBF_LIKE_HELL |
1668 | debug_set_level(TAPE_DBF_AREA, 6); |
1669 | #endif |
1670 | |
1671 | DBF_EVENT(3, "3590 init\n" ); |
1672 | |
1673 | tape_3590_wq = alloc_workqueue(fmt: "tape_3590" , flags: 0, max_active: 0); |
1674 | if (!tape_3590_wq) |
1675 | return -ENOMEM; |
1676 | |
1677 | /* Register driver for 3590 tapes. */ |
1678 | rc = ccw_driver_register(&tape_3590_driver); |
1679 | if (rc) { |
1680 | destroy_workqueue(wq: tape_3590_wq); |
1681 | DBF_EVENT(3, "3590 init failed\n" ); |
1682 | } else |
1683 | DBF_EVENT(3, "3590 registered\n" ); |
1684 | return rc; |
1685 | } |
1686 | |
1687 | static void |
1688 | tape_3590_exit(void) |
1689 | { |
1690 | ccw_driver_unregister(&tape_3590_driver); |
1691 | destroy_workqueue(wq: tape_3590_wq); |
1692 | debug_unregister(TAPE_DBF_AREA); |
1693 | } |
1694 | |
1695 | MODULE_DEVICE_TABLE(ccw, tape_3590_ids); |
1696 | MODULE_AUTHOR("(C) 2001,2006 IBM Corporation" ); |
1697 | MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver" ); |
1698 | MODULE_LICENSE("GPL" ); |
1699 | |
1700 | module_init(tape_3590_init); |
1701 | module_exit(tape_3590_exit); |
1702 | |