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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / s390 / char / tape_3590.c
blob8246ef3ab09583da05e33519bcf8e738e55b5a5a
1 /*
2 * drivers/s390/char/tape_3590.c
3 * tape device discipline for 3590 tapes.
4 *
5 * Copyright IBM Corp. 2001,2006
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 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/bio.h>
14 #include <asm/ebcdic.h>
15
16 #define TAPE_DBF_AREA tape_3590_dbf
17
18 #include "tape.h"
19 #include "tape_std.h"
20 #include "tape_3590.h"
21
22 /*
23 * Pointer to debug area.
24 */
25 debug_info_t *TAPE_DBF_AREA = NULL;
26 EXPORT_SYMBOL(TAPE_DBF_AREA);
27
28 /*******************************************************************
29 * Error Recovery fuctions:
30 * - Read Opposite: implemented
31 * - Read Device (buffered) log: BRA
32 * - Read Library log: BRA
33 * - Swap Devices: BRA
34 * - Long Busy: implemented
35 * - Special Intercept: BRA
36 * - Read Alternate: implemented
37 *******************************************************************/
38
39 #define PRINTK_HEADER "TAPE_3590: "
40
41 static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = {
42 [0x00] = "",
43 [0x10] = "Lost Sense",
44 [0x11] = "Assigned Elsewhere",
45 [0x12] = "Allegiance Reset",
46 [0x13] = "Shared Access Violation",
47 [0x20] = "Command Reject",
48 [0x21] = "Configuration Error",
49 [0x22] = "Protection Exception",
50 [0x23] = "Write Protect",
51 [0x24] = "Write Length",
52 [0x25] = "Read-Only Format",
53 [0x31] = "Beginning of Partition",
54 [0x33] = "End of Partition",
55 [0x34] = "End of Data",
56 [0x35] = "Block not found",
57 [0x40] = "Device Intervention",
58 [0x41] = "Loader Intervention",
59 [0x42] = "Library Intervention",
60 [0x50] = "Write Error",
61 [0x51] = "Erase Error",
62 [0x52] = "Formatting Error",
63 [0x53] = "Read Error",
64 [0x54] = "Unsupported Format",
65 [0x55] = "No Formatting",
66 [0x56] = "Positioning lost",
67 [0x57] = "Read Length",
68 [0x60] = "Unsupported Medium",
69 [0x61] = "Medium Length Error",
70 [0x62] = "Medium removed",
71 [0x64] = "Load Check",
72 [0x65] = "Unload Check",
73 [0x70] = "Equipment Check",
74 [0x71] = "Bus out Check",
75 [0x72] = "Protocol Error",
76 [0x73] = "Interface Error",
77 [0x74] = "Overrun",
78 [0x75] = "Halt Signal",
79 [0x90] = "Device fenced",
80 [0x91] = "Device Path fenced",
81 [0xa0] = "Volume misplaced",
82 [0xa1] = "Volume inaccessible",
83 [0xa2] = "Volume in input",
84 [0xa3] = "Volume ejected",
85 [0xa4] = "All categories reserved",
86 [0xa5] = "Duplicate Volume",
87 [0xa6] = "Library Manager Offline",
88 [0xa7] = "Library Output Station full",
89 [0xa8] = "Vision System non-operational",
90 [0xa9] = "Library Manager Equipment Check",
91 [0xaa] = "Library Equipment Check",
92 [0xab] = "All Library Cells full",
93 [0xac] = "No Cleaner Volumes in Library",
94 [0xad] = "I/O Station door open",
95 [0xae] = "Subsystem environmental alert",
96 };
97
98 static int crypt_supported(struct tape_device *device)
99 {
100 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device));
101 }
102
103 static int crypt_enabled(struct tape_device *device)
104 {
105 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device));
106 }
107
108 static void ext_to_int_kekl(struct tape390_kekl *in,
109 struct tape3592_kekl *out)
110 {
111 int i;
112
113 memset(out, 0, sizeof(*out));
114 if (in->type == TAPE390_KEKL_TYPE_HASH)
115 out->flags |= 0x40;
116 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH)
117 out->flags |= 0x80;
118 strncpy(out->label, in->label, 64);
119 for (i = strlen(in->label); i < sizeof(out->label); i++)
120 out->label[i] = ' ';
121 ASCEBC(out->label, sizeof(out->label));
122 }
123
124 static void int_to_ext_kekl(struct tape3592_kekl *in,
125 struct tape390_kekl *out)
126 {
127 memset(out, 0, sizeof(*out));
128 if(in->flags & 0x40)
129 out->type = TAPE390_KEKL_TYPE_HASH;
130 else
131 out->type = TAPE390_KEKL_TYPE_LABEL;
132 if(in->flags & 0x80)
133 out->type_on_tape = TAPE390_KEKL_TYPE_HASH;
134 else
135 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL;
136 memcpy(out->label, in->label, sizeof(in->label));
137 EBCASC(out->label, sizeof(in->label));
138 strstrip(out->label);
139 }
140
141 static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in,
142 struct tape390_kekl_pair *out)
143 {
144 if (in->count == 0) {
145 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE;
146 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE;
147 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;
148 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;
149 } else if (in->count == 1) {
150 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
151 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;
152 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;
153 } else if (in->count == 2) {
154 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
155 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]);
156 } else {
157 printk("Invalid KEKL number: %d\n", in->count);
158 BUG();
159 }
160 }
161
162 static int check_ext_kekl(struct tape390_kekl *kekl)
163 {
164 if (kekl->type == TAPE390_KEKL_TYPE_NONE)
165 goto invalid;
166 if (kekl->type > TAPE390_KEKL_TYPE_HASH)
167 goto invalid;
168 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE)
169 goto invalid;
170 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH)
171 goto invalid;
172 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) &&
173 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL))
174 goto invalid;
175
176 return 0;
177 invalid:
178 return -EINVAL;
179 }
180
181 static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls)
182 {
183 if (check_ext_kekl(&kekls->kekl[0]))
184 goto invalid;
185 if (check_ext_kekl(&kekls->kekl[1]))
186 goto invalid;
187
188 return 0;
189 invalid:
190 return -EINVAL;
191 }
192
193 /*
194 * Query KEKLs
195 */
196 static int tape_3592_kekl_query(struct tape_device *device,
197 struct tape390_kekl_pair *ext_kekls)
198 {
199 struct tape_request *request;
200 struct tape3592_kekl_query_order *order;
201 struct tape3592_kekl_query_data *int_kekls;
202 int rc;
203
204 DBF_EVENT(6, "tape3592_kekl_query\n");
205 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA);
206 if (!int_kekls)
207 return -ENOMEM;
208 request = tape_alloc_request(2, sizeof(*order));
209 if (IS_ERR(request)) {
210 rc = PTR_ERR(request);
211 goto fail_malloc;
212 }
213 order = request->cpdata;
214 memset(order,0,sizeof(*order));
215 order->code = 0xe2;
216 order->max_count = 2;
217 request->op = TO_KEKL_QUERY;
218 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
219 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls),
220 int_kekls);
221 rc = tape_do_io(device, request);
222 if (rc)
223 goto fail_request;
224 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls);
225
226 rc = 0;
227 fail_request:
228 tape_free_request(request);
229 fail_malloc:
230 kfree(int_kekls);
231 return rc;
232 }
233
234 /*
235 * IOCTL: Query KEKLs
236 */
237 static int tape_3592_ioctl_kekl_query(struct tape_device *device,
238 unsigned long arg)
239 {
240 int rc;
241 struct tape390_kekl_pair *ext_kekls;
242
243 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n");
244 if (!crypt_supported(device))
245 return -ENOSYS;
246 if (!crypt_enabled(device))
247 return -EUNATCH;
248 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL);
249 if (!ext_kekls)
250 return -ENOMEM;
251 rc = tape_3592_kekl_query(device, ext_kekls);
252 if (rc != 0)
253 goto fail;
254 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) {
255 rc = -EFAULT;
256 goto fail;
257 }
258 rc = 0;
259 fail:
260 kfree(ext_kekls);
261 return rc;
262 }
263
264 static int tape_3590_mttell(struct tape_device *device, int mt_count);
265
266 /*
267 * Set KEKLs
268 */
269 static int tape_3592_kekl_set(struct tape_device *device,
270 struct tape390_kekl_pair *ext_kekls)
271 {
272 struct tape_request *request;
273 struct tape3592_kekl_set_order *order;
274
275 DBF_EVENT(6, "tape3592_kekl_set\n");
276 if (check_ext_kekl_pair(ext_kekls)) {
277 DBF_EVENT(6, "invalid kekls\n");
278 return -EINVAL;
279 }
280 if (tape_3590_mttell(device, 0) != 0)
281 return -EBADSLT;
282 request = tape_alloc_request(1, sizeof(*order));
283 if (IS_ERR(request))
284 return PTR_ERR(request);
285 order = request->cpdata;
286 memset(order, 0, sizeof(*order));
287 order->code = 0xe3;
288 order->kekls.count = 2;
289 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]);
290 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]);
291 request->op = TO_KEKL_SET;
292 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
293
294 return tape_do_io_free(device, request);
295 }
296
297 /*
298 * IOCTL: Set KEKLs
299 */
300 static int tape_3592_ioctl_kekl_set(struct tape_device *device,
301 unsigned long arg)
302 {
303 int rc;
304 struct tape390_kekl_pair *ext_kekls;
305
306 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n");
307 if (!crypt_supported(device))
308 return -ENOSYS;
309 if (!crypt_enabled(device))
310 return -EUNATCH;
311 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL);
312 if (!ext_kekls)
313 return -ENOMEM;
314 if (copy_from_user(ext_kekls, (char __user *)arg, sizeof(*ext_kekls))) {
315 rc = -EFAULT;
316 goto out;
317 }
318 rc = tape_3592_kekl_set(device, ext_kekls);
319 out:
320 kfree(ext_kekls);
321 return rc;
322 }
323
324 /*
325 * Enable encryption
326 */
327 static int 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 -ENOSYS;
335 request = tape_alloc_request(2, 72);
336 if (IS_ERR(request))
337 return PTR_ERR(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 tape_do_io_free(device, request);
353 }
354
355 /*
356 * Disable encryption
357 */
358 static int tape_3592_disable_crypt(struct tape_device *device)
359 {
360 struct tape_request *request;
361 char *data;
362
363 DBF_EVENT(6, "tape_3592_disable_crypt\n");
364 if (!crypt_supported(device))
365 return -ENOSYS;
366 request = tape_alloc_request(2, 72);
367 if (IS_ERR(request))
368 return PTR_ERR(request);
369 data = request->cpdata;
370 memset(data,0,72);
371
372 data[0] = 0x05;
373 data[36 + 0] = 0x03;
374 data[36 + 1] = 0x03;
375 data[36 + 35] = 0x32;
376
377 request->op = TO_CRYPT_OFF;
378 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
379 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
380
381 return tape_do_io_free(device, request);
382 }
383
384 /*
385 * IOCTL: Set encryption status
386 */
387 static int tape_3592_ioctl_crypt_set(struct tape_device *device,
388 unsigned long arg)
389 {
390 struct tape390_crypt_info info;
391
392 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n");
393 if (!crypt_supported(device))
394 return -ENOSYS;
395 if (copy_from_user(&info, (char __user *)arg, sizeof(info)))
396 return -EFAULT;
397 if (info.status & ~TAPE390_CRYPT_ON_MASK)
398 return -EINVAL;
399 if (info.status & TAPE390_CRYPT_ON_MASK)
400 return tape_3592_enable_crypt(device);
401 else
402 return tape_3592_disable_crypt(device);
403 }
404
405 static int tape_3590_sense_medium(struct tape_device *device);
406
407 /*
408 * IOCTL: Query enryption status
409 */
410 static int tape_3592_ioctl_crypt_query(struct tape_device *device,
411 unsigned long arg)
412 {
413 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n");
414 if (!crypt_supported(device))
415 return -ENOSYS;
416 tape_3590_sense_medium(device);
417 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device),
418 sizeof(TAPE_3590_CRYPT_INFO(device))))
419 return -EFAULT;
420 else
421 return 0;
422 }
423
424 /*
425 * 3590 IOCTL Overload
426 */
427 static int
428 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)
429 {
430 switch (cmd) {
431 case TAPE390_DISPLAY: {
432 struct display_struct disp;
433
434 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)))
435 return -EFAULT;
436
437 return tape_std_display(device, &disp);
438 }
439 case TAPE390_KEKL_SET:
440 return tape_3592_ioctl_kekl_set(device, arg);
441 case TAPE390_KEKL_QUERY:
442 return tape_3592_ioctl_kekl_query(device, arg);
443 case TAPE390_CRYPT_SET:
444 return tape_3592_ioctl_crypt_set(device, arg);
445 case TAPE390_CRYPT_QUERY:
446 return tape_3592_ioctl_crypt_query(device, arg);
447 default:
448 return -EINVAL; /* no additional ioctls */
449 }
450 }
451
452 /*
453 * SENSE Medium: Get Sense data about medium state
454 */
455 static int
456 tape_3590_sense_medium(struct tape_device *device)
457 {
458 struct tape_request *request;
459
460 request = tape_alloc_request(1, 128);
461 if (IS_ERR(request))
462 return PTR_ERR(request);
463 request->op = TO_MSEN;
464 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
465 return tape_do_io_free(device, request);
466 }
467
468 /*
469 * MTTELL: Tell block. Return the number of block relative to current file.
470 */
471 static int
472 tape_3590_mttell(struct tape_device *device, int mt_count)
473 {
474 __u64 block_id;
475 int rc;
476
477 rc = tape_std_read_block_id(device, &block_id);
478 if (rc)
479 return rc;
480 return block_id >> 32;
481 }
482
483 /*
484 * MTSEEK: seek to the specified block.
485 */
486 static int
487 tape_3590_mtseek(struct tape_device *device, int count)
488 {
489 struct tape_request *request;
490
491 DBF_EVENT(6, "xsee id: %x\n", count);
492 request = tape_alloc_request(3, 4);
493 if (IS_ERR(request))
494 return PTR_ERR(request);
495 request->op = TO_LBL;
496 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
497 *(__u32 *) request->cpdata = count;
498 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
499 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
500 return tape_do_io_free(device, request);
501 }
502
503 /*
504 * Read Opposite Error Recovery Function:
505 * Used, when Read Forward does not work
506 */
507 static void
508 tape_3590_read_opposite(struct tape_device *device,
509 struct tape_request *request)
510 {
511 struct tape_3590_disc_data *data;
512
513 /*
514 * We have allocated 4 ccws in tape_std_read, so we can now
515 * transform the request to a read backward, followed by a
516 * forward space block.
517 */
518 request->op = TO_RBA;
519 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
520 data = device->discdata;
521 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,
522 device->char_data.idal_buf);
523 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
524 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
525 DBF_EVENT(6, "xrop ccwg\n");
526 }
527
528 /*
529 * Read Attention Msg
530 * This should be done after an interrupt with attention bit (0x80)
531 * in device state.
532 *
533 * After a "read attention message" request there are two possible
534 * results:
535 *
536 * 1. A unit check is presented, when attention sense is present (e.g. when
537 * a medium has been unloaded). The attention sense comes then
538 * together with the unit check. The recovery action is either "retry"
539 * (in case there is an attention message pending) or "permanent error".
540 *
541 * 2. The attention msg is written to the "read subsystem data" buffer.
542 * In this case we probably should print it to the console.
543 */
544 static int
545 tape_3590_read_attmsg(struct tape_device *device)
546 {
547 struct tape_request *request;
548 char *buf;
549
550 request = tape_alloc_request(3, 4096);
551 if (IS_ERR(request))
552 return PTR_ERR(request);
553 request->op = TO_READ_ATTMSG;
554 buf = request->cpdata;
555 buf[0] = PREP_RD_SS_DATA;
556 buf[6] = RD_ATTMSG; /* read att msg */
557 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf);
558 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12);
559 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
560 return tape_do_io_free(device, request);
561 }
562
563 /*
564 * These functions are used to schedule follow-up actions from within an
565 * interrupt context (like unsolicited interrupts).
566 */
567 struct work_handler_data {
568 struct tape_device *device;
569 enum tape_op op;
570 struct work_struct work;
571 };
572
573 static void
574 tape_3590_work_handler(struct work_struct *work)
575 {
576 struct work_handler_data *p =
577 container_of(work, struct work_handler_data, work);
578
579 switch (p->op) {
580 case TO_MSEN:
581 tape_3590_sense_medium(p->device);
582 break;
583 case TO_READ_ATTMSG:
584 tape_3590_read_attmsg(p->device);
585 break;
586 case TO_CRYPT_ON:
587 tape_3592_enable_crypt(p->device);
588 break;
589 case TO_CRYPT_OFF:
590 tape_3592_disable_crypt(p->device);
591 break;
592 default:
593 DBF_EVENT(3, "T3590: work handler undefined for "
594 "operation 0x%02x\n", p->op);
595 }
596 tape_put_device(p->device);
597 kfree(p);
598 }
599
600 static int
601 tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
602 {
603 struct work_handler_data *p;
604
605 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
606 return -ENOMEM;
607
608 INIT_WORK(&p->work, tape_3590_work_handler);
609
610 p->device = tape_get_device_reference(device);
611 p->op = op;
612
613 schedule_work(&p->work);
614 return 0;
615 }
616
617 #ifdef CONFIG_S390_TAPE_BLOCK
618 /*
619 * Tape Block READ
620 */
621 static struct tape_request *
622 tape_3590_bread(struct tape_device *device, struct request *req)
623 {
624 struct tape_request *request;
625 struct ccw1 *ccw;
626 int count = 0, start_block;
627 unsigned off;
628 char *dst;
629 struct bio_vec *bv;
630 struct req_iterator iter;
631
632 DBF_EVENT(6, "xBREDid:");
633 start_block = req->sector >> TAPEBLOCK_HSEC_S2B;
634 DBF_EVENT(6, "start_block = %i\n", start_block);
635
636 rq_for_each_segment(bv, req, iter)
637 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
638
639 request = tape_alloc_request(2 + count + 1, 4);
640 if (IS_ERR(request))
641 return request;
642 request->op = TO_BLOCK;
643 *(__u32 *) request->cpdata = start_block;
644 ccw = request->cpaddr;
645 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte);
646
647 /*
648 * We always setup a nop after the mode set ccw. This slot is
649 * used in tape_std_check_locate to insert a locate ccw if the
650 * current tape position doesn't match the start block to be read.
651 */
652 ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
653
654 rq_for_each_segment(bv, req, iter) {
655 dst = page_address(bv->bv_page) + bv->bv_offset;
656 for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) {
657 ccw->flags = CCW_FLAG_CC;
658 ccw->cmd_code = READ_FORWARD;
659 ccw->count = TAPEBLOCK_HSEC_SIZE;
660 set_normalized_cda(ccw, (void *) __pa(dst));
661 ccw++;
662 dst += TAPEBLOCK_HSEC_SIZE;
663 }
664 if (off > bv->bv_len)
665 BUG();
666 }
667 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
668 DBF_EVENT(6, "xBREDccwg\n");
669 return request;
670 }
671
672 static void
673 tape_3590_free_bread(struct tape_request *request)
674 {
675 struct ccw1 *ccw;
676
677 /* Last ccw is a nop and doesn't need clear_normalized_cda */
678 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++)
679 if (ccw->cmd_code == READ_FORWARD)
680 clear_normalized_cda(ccw);
681 tape_free_request(request);
682 }
683
684 /*
685 * check_locate is called just before the tape request is passed to
686 * the common io layer for execution. It has to check the current
687 * tape position and insert a locate ccw if it doesn't match the
688 * start block for the request.
689 */
690 static void
691 tape_3590_check_locate(struct tape_device *device, struct tape_request *request)
692 {
693 __u32 *start_block;
694
695 start_block = (__u32 *) request->cpdata;
696 if (*start_block != device->blk_data.block_position) {
697 /* Add the start offset of the file to get the real block. */
698 *start_block += device->bof;
699 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
700 }
701 }
702 #endif
703
704 static void tape_3590_med_state_set(struct tape_device *device,
705 struct tape_3590_med_sense *sense)
706 {
707 struct tape390_crypt_info *c_info;
708
709 c_info = &TAPE_3590_CRYPT_INFO(device);
710
711 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst);
712 switch (sense->macst) {
713 case 0x04:
714 case 0x05:
715 case 0x06:
716 tape_med_state_set(device, MS_UNLOADED);
717 TAPE_3590_CRYPT_INFO(device).medium_status = 0;
718 return;
719 case 0x08:
720 case 0x09:
721 tape_med_state_set(device, MS_LOADED);
722 break;
723 default:
724 tape_med_state_set(device, MS_UNKNOWN);
725 return;
726 }
727 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK;
728 if (sense->flags & MSENSE_CRYPT_MASK) {
729 PRINT_INFO("Medium is encrypted (%04x)\n", sense->flags);
730 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK;
731 } else {
732 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags);
733 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK;
734 }
735 }
736
737 /*
738 * The done handler is called at device/channel end and wakes up the sleeping
739 * process
740 */
741 static int
742 tape_3590_done(struct tape_device *device, struct tape_request *request)
743 {
744 struct tape_3590_disc_data *disc_data;
745
746 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
747 disc_data = device->discdata;
748
749 switch (request->op) {
750 case TO_BSB:
751 case TO_BSF:
752 case TO_DSE:
753 case TO_FSB:
754 case TO_FSF:
755 case TO_LBL:
756 case TO_RFO:
757 case TO_RBA:
758 case TO_REW:
759 case TO_WRI:
760 case TO_WTM:
761 case TO_BLOCK:
762 case TO_LOAD:
763 tape_med_state_set(device, MS_LOADED);
764 break;
765 case TO_RUN:
766 tape_med_state_set(device, MS_UNLOADED);
767 tape_3590_schedule_work(device, TO_CRYPT_OFF);
768 break;
769 case TO_MSEN:
770 tape_3590_med_state_set(device, request->cpdata);
771 break;
772 case TO_CRYPT_ON:
773 TAPE_3590_CRYPT_INFO(device).status
774 |= TAPE390_CRYPT_ON_MASK;
775 *(device->modeset_byte) |= 0x03;
776 break;
777 case TO_CRYPT_OFF:
778 TAPE_3590_CRYPT_INFO(device).status
779 &= ~TAPE390_CRYPT_ON_MASK;
780 *(device->modeset_byte) &= ~0x03;
781 break;
782 case TO_RBI: /* RBI seems to succeed even without medium loaded. */
783 case TO_NOP: /* Same to NOP. */
784 case TO_READ_CONFIG:
785 case TO_READ_ATTMSG:
786 case TO_DIS:
787 case TO_ASSIGN:
788 case TO_UNASSIGN:
789 case TO_SIZE:
790 case TO_KEKL_SET:
791 case TO_KEKL_QUERY:
792 case TO_RDC:
793 break;
794 }
795 return TAPE_IO_SUCCESS;
796 }
797
798 /*
799 * This fuction is called, when error recovery was successfull
800 */
801 static inline int
802 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
803 {
804 DBF_EVENT(3, "Error Recovery successfull for %s\n",
805 tape_op_verbose[request->op]);
806 return tape_3590_done(device, request);
807 }
808
809 /*
810 * This fuction is called, when error recovery was not successfull
811 */
812 static inline int
813 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
814 struct irb *irb, int rc)
815 {
816 DBF_EVENT(3, "Error Recovery failed for %s\n",
817 tape_op_verbose[request->op]);
818 tape_dump_sense_dbf(device, request, irb);
819 return rc;
820 }
821
822 /*
823 * Error Recovery do retry
824 */
825 static inline int
826 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
827 struct irb *irb)
828 {
829 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
830 tape_dump_sense_dbf(device, request, irb);
831 return TAPE_IO_RETRY;
832 }
833
834 /*
835 * Handle unsolicited interrupts
836 */
837 static int
838 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
839 {
840 if (irb->scsw.dstat == DEV_STAT_CHN_END)
841 /* Probably result of halt ssch */
842 return TAPE_IO_PENDING;
843 else if (irb->scsw.dstat == 0x85)
844 /* Device Ready */
845 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id);
846 else if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
847 tape_3590_schedule_work(device, TO_READ_ATTMSG);
848 } else {
849 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
850 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
851 tape_dump_sense(device, NULL, irb);
852 }
853 /* check medium state */
854 tape_3590_schedule_work(device, TO_MSEN);
855 return TAPE_IO_SUCCESS;
856 }
857
858 /*
859 * Basic Recovery routine
860 */
861 static int
862 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
863 struct irb *irb, int rc)
864 {
865 struct tape_3590_sense *sense;
866
867 sense = (struct tape_3590_sense *) irb->ecw;
868
869 switch (sense->bra) {
870 case SENSE_BRA_PER:
871 return tape_3590_erp_failed(device, request, irb, rc);
872 case SENSE_BRA_CONT:
873 return tape_3590_erp_succeded(device, request);
874 case SENSE_BRA_RE:
875 return tape_3590_erp_retry(device, request, irb);
876 case SENSE_BRA_DRE:
877 return tape_3590_erp_failed(device, request, irb, rc);
878 default:
879 PRINT_ERR("Unknown BRA %x - This should not happen!\n",
880 sense->bra);
881 BUG();
882 return TAPE_IO_STOP;
883 }
884 }
885
886 /*
887 * RDL: Read Device (buffered) log
888 */
889 static int
890 tape_3590_erp_read_buf_log(struct tape_device *device,
891 struct tape_request *request, struct irb *irb)
892 {
893 /*
894 * We just do the basic error recovery at the moment (retry).
895 * Perhaps in the future, we read the log and dump it somewhere...
896 */
897 return tape_3590_erp_basic(device, request, irb, -EIO);
898 }
899
900 /*
901 * SWAP: Swap Devices
902 */
903 static int
904 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
905 struct irb *irb)
906 {
907 /*
908 * This error recovery should swap the tapes
909 * if the original has a problem. The operation
910 * should proceed with the new tape... this
911 * should probably be done in user space!
912 */
913 PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id);
914 return tape_3590_erp_basic(device, request, irb, -EIO);
915 }
916
917 /*
918 * LBY: Long Busy
919 */
920 static int
921 tape_3590_erp_long_busy(struct tape_device *device,
922 struct tape_request *request, struct irb *irb)
923 {
924 DBF_EVENT(6, "Device is busy\n");
925 return TAPE_IO_LONG_BUSY;
926 }
927
928 /*
929 * SPI: Special Intercept
930 */
931 static int
932 tape_3590_erp_special_interrupt(struct tape_device *device,
933 struct tape_request *request, struct irb *irb)
934 {
935 return tape_3590_erp_basic(device, request, irb, -EIO);
936 }
937
938 /*
939 * RDA: Read Alternate
940 */
941 static int
942 tape_3590_erp_read_alternate(struct tape_device *device,
943 struct tape_request *request, struct irb *irb)
944 {
945 struct tape_3590_disc_data *data;
946
947 /*
948 * The issued Read Backward or Read Previous command is not
949 * supported by the device
950 * The recovery action should be to issue another command:
951 * Read Revious: if Read Backward is not supported
952 * Read Backward: if Read Previous is not supported
953 */
954 data = device->discdata;
955 if (data->read_back_op == READ_PREVIOUS) {
956 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
957 device->cdev_id);
958 data->read_back_op = READ_BACKWARD;
959 } else {
960 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
961 device->cdev_id);
962 data->read_back_op = READ_PREVIOUS;
963 }
964 tape_3590_read_opposite(device, request);
965 return tape_3590_erp_retry(device, request, irb);
966 }
967
968 /*
969 * Error Recovery read opposite
970 */
971 static int
972 tape_3590_erp_read_opposite(struct tape_device *device,
973 struct tape_request *request, struct irb *irb)
974 {
975 switch (request->op) {
976 case TO_RFO:
977 /*
978 * We did read forward, but the data could not be read.
979 * We will read backward and then skip forward again.
980 */
981 tape_3590_read_opposite(device, request);
982 return tape_3590_erp_retry(device, request, irb);
983 case TO_RBA:
984 /* We tried to read forward and backward, but hat no success */
985 return tape_3590_erp_failed(device, request, irb, -EIO);
986 break;
987 default:
988 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n",
989 tape_op_verbose[request->op]);
990 return tape_3590_erp_failed(device, request, irb, -EIO);
991 }
992 }
993
994 /*
995 * Print an MIM (Media Information Message) (message code f0)
996 */
997 static void
998 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
999 {
1000 struct tape_3590_sense *sense;
1001
1002 sense = (struct tape_3590_sense *) irb->ecw;
1003 /* Exception Message */
1004 switch (sense->fmt.f70.emc) {
1005 case 0x02:
1006 PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id);
1007 break;
1008 case 0x03:
1009 PRINT_WARN("(%s): Data degraded in partion %i\n",
1010 device->cdev->dev.bus_id, sense->fmt.f70.mp);
1011 break;
1012 case 0x04:
1013 PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id);
1014 break;
1015 case 0x05:
1016 PRINT_WARN("(%s): Medium degraded in partition %i\n",
1017 device->cdev->dev.bus_id, sense->fmt.f70.mp);
1018 break;
1019 case 0x06:
1020 PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id);
1021 break;
1022 case 0x07:
1023 PRINT_WARN("(%s): Medium Exception 0x%02x\n",
1024 device->cdev->dev.bus_id, sense->fmt.f70.md);
1025 break;
1026 default:
1027 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n",
1028 device->cdev->dev.bus_id, sense->fmt.f70.emc);
1029 break;
1030 }
1031 /* Service Message */
1032 switch (sense->fmt.f70.smc) {
1033 case 0x02:
1034 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n",
1035 device->cdev->dev.bus_id, sense->fmt.f70.md);
1036 break;
1037 default:
1038 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n",
1039 device->cdev->dev.bus_id, sense->fmt.f70.smc);
1040 break;
1041 }
1042 }
1043
1044 /*
1045 * Print an I/O Subsystem Service Information Message (message code f1)
1046 */
1047 static void
1048 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
1049 {
1050 struct tape_3590_sense *sense;
1051
1052 sense = (struct tape_3590_sense *) irb->ecw;
1053 /* Exception Message */
1054 switch (sense->fmt.f71.emc) {
1055 case 0x01:
1056 PRINT_WARN("(%s): Effect of failure is unknown\n",
1057 device->cdev->dev.bus_id);
1058 break;
1059 case 0x02:
1060 PRINT_WARN("(%s): CU Exception - no performance impact\n",
1061 device->cdev->dev.bus_id);
1062 break;
1063 case 0x03:
1064 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n",
1065 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1066 break;
1067 case 0x04:
1068 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n",
1069 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1070 break;
1071 case 0x05:
1072 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n",
1073 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1074 break;
1075 case 0x06:
1076 PRINT_WARN("(%s): CU Exception on node 0x%02x\n",
1077 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1078 break;
1079 case 0x07:
1080 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n",
1081 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1082 break;
1083 default:
1084 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n",
1085 device->cdev->dev.bus_id, sense->fmt.f71.emc);
1086 }
1087 /* Service Message */
1088 switch (sense->fmt.f71.smc) {
1089 case 0x01:
1090 PRINT_WARN("(%s): Repair impact is unknown\n",
1091 device->cdev->dev.bus_id);
1092 break;
1093 case 0x02:
1094 PRINT_WARN("(%s): Repair will not impact cu performance\n",
1095 device->cdev->dev.bus_id);
1096 break;
1097 case 0x03:
1098 if (sense->fmt.f71.mdf == 0)
1099 PRINT_WARN("(%s): Repair will disable node "
1100 "0x%x on CU\n",
1101 device->cdev->dev.bus_id,
1102 sense->fmt.f71.md[1]);
1103 else
1104 PRINT_WARN("(%s): Repair will disable nodes "
1105 "(0x%x-0x%x) on CU\n",
1106 device->cdev->dev.bus_id,
1107 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1108 break;
1109 case 0x04:
1110 if (sense->fmt.f71.mdf == 0)
1111 PRINT_WARN("(%s): Repair will disable cannel path "
1112 "0x%x on CU\n",
1113 device->cdev->dev.bus_id,
1114 sense->fmt.f71.md[1]);
1115 else
1116 PRINT_WARN("(%s): Repair will disable cannel paths "
1117 "(0x%x-0x%x) on CU\n",
1118 device->cdev->dev.bus_id,
1119 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1120 break;
1121 case 0x05:
1122 if (sense->fmt.f71.mdf == 0)
1123 PRINT_WARN("(%s): Repair will disable device path "
1124 "0x%x on CU\n",
1125 device->cdev->dev.bus_id,
1126 sense->fmt.f71.md[1]);
1127 else
1128 PRINT_WARN("(%s): Repair will disable device paths "
1129 "(0x%x-0x%x) on CU\n",
1130 device->cdev->dev.bus_id,
1131 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1132 break;
1133 case 0x06:
1134 if (sense->fmt.f71.mdf == 0)
1135 PRINT_WARN("(%s): Repair will disable library path "
1136 "0x%x on CU\n",
1137 device->cdev->dev.bus_id,
1138 sense->fmt.f71.md[1]);
1139 else
1140 PRINT_WARN("(%s): Repair will disable library paths "
1141 "(0x%x-0x%x) on CU\n",
1142 device->cdev->dev.bus_id,
1143 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1144 break;
1145 case 0x07:
1146 PRINT_WARN("(%s): Repair will disable access to CU\n",
1147 device->cdev->dev.bus_id);
1148 break;
1149 default:
1150 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n",
1151 device->cdev->dev.bus_id, sense->fmt.f71.smc);
1152 }
1153 }
1154
1155 /*
1156 * Print an Device Subsystem Service Information Message (message code f2)
1157 */
1158 static void
1159 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
1160 {
1161 struct tape_3590_sense *sense;
1162
1163 sense = (struct tape_3590_sense *) irb->ecw;
1164 /* Exception Message */
1165 switch (sense->fmt.f71.emc) {
1166 case 0x01:
1167 PRINT_WARN("(%s): Effect of failure is unknown\n",
1168 device->cdev->dev.bus_id);
1169 break;
1170 case 0x02:
1171 PRINT_WARN("(%s): DV Exception - no performance impact\n",
1172 device->cdev->dev.bus_id);
1173 break;
1174 case 0x03:
1175 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n",
1176 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1177 break;
1178 case 0x04:
1179 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n",
1180 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1181 break;
1182 case 0x05:
1183 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n",
1184 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1185 break;
1186 case 0x06:
1187 PRINT_WARN("(%s): DV Exception in tape path\n",
1188 device->cdev->dev.bus_id);
1189 break;
1190 case 0x07:
1191 PRINT_WARN("(%s): DV Exception in drive\n",
1192 device->cdev->dev.bus_id);
1193 break;
1194 default:
1195 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n",
1196 device->cdev->dev.bus_id, sense->fmt.f71.emc);
1197 }
1198 /* Service Message */
1199 switch (sense->fmt.f71.smc) {
1200 case 0x01:
1201 PRINT_WARN("(%s): Repair impact is unknown\n",
1202 device->cdev->dev.bus_id);
1203 break;
1204 case 0x02:
1205 PRINT_WARN("(%s): Repair will not impact device performance\n",
1206 device->cdev->dev.bus_id);
1207 break;
1208 case 0x03:
1209 if (sense->fmt.f71.mdf == 0)
1210 PRINT_WARN("(%s): Repair will disable channel path "
1211 "0x%x on DV\n",
1212 device->cdev->dev.bus_id,
1213 sense->fmt.f71.md[1]);
1214 else
1215 PRINT_WARN("(%s): Repair will disable channel path "
1216 "(0x%x-0x%x) on DV\n",
1217 device->cdev->dev.bus_id,
1218 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1219 break;
1220 case 0x04:
1221 if (sense->fmt.f71.mdf == 0)
1222 PRINT_WARN("(%s): Repair will disable interface 0x%x "
1223 "on DV\n",
1224 device->cdev->dev.bus_id,
1225 sense->fmt.f71.md[1]);
1226 else
1227 PRINT_WARN("(%s): Repair will disable interfaces "
1228 "(0x%x-0x%x) on DV\n",
1229 device->cdev->dev.bus_id,
1230 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1231 break;
1232 case 0x05:
1233 if (sense->fmt.f71.mdf == 0)
1234 PRINT_WARN("(%s): Repair will disable loader 0x%x "
1235 "on DV\n",
1236 device->cdev->dev.bus_id,
1237 sense->fmt.f71.md[1]);
1238 else
1239 PRINT_WARN("(%s): Repair will disable loader "
1240 "(0x%x-0x%x) on DV\n",
1241 device->cdev->dev.bus_id,
1242 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1243 break;
1244 case 0x07:
1245 PRINT_WARN("(%s): Repair will disable access to DV\n",
1246 device->cdev->dev.bus_id);
1247 break;
1248 case 0x08:
1249 if (sense->fmt.f71.mdf == 0)
1250 PRINT_WARN("(%s): Repair will disable message "
1251 "display 0x%x on DV\n",
1252 device->cdev->dev.bus_id,
1253 sense->fmt.f71.md[1]);
1254 else
1255 PRINT_WARN("(%s): Repair will disable message "
1256 "displays (0x%x-0x%x) on DV\n",
1257 device->cdev->dev.bus_id,
1258 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1259 break;
1260 case 0x09:
1261 PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id);
1262 break;
1263 default:
1264 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n",
1265 device->cdev->dev.bus_id, sense->fmt.f71.smc);
1266 }
1267 }
1268
1269 /*
1270 * Print standard ERA Message
1271 */
1272 static void
1273 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
1274 {
1275 struct tape_3590_sense *sense;
1276
1277 sense = (struct tape_3590_sense *) irb->ecw;
1278 if (sense->mc == 0)
1279 return;
1280 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
1281 if (tape_3590_msg[sense->mc] != NULL)
1282 PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id,
1283 tape_3590_msg[sense->mc]);
1284 else {
1285 PRINT_WARN("(%s): Message Code 0x%x\n",
1286 device->cdev->dev.bus_id, sense->mc);
1287 }
1288 return;
1289 }
1290 if (sense->mc == 0xf0) {
1291 /* Standard Media Information Message */
1292 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, "
1293 "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id,
1294 sense->fmt.f70.sev, sense->mc,
1295 sense->fmt.f70.emc, sense->fmt.f70.smc,
1296 sense->fmt.f70.refcode, sense->fmt.f70.mid,
1297 sense->fmt.f70.fid);
1298 tape_3590_print_mim_msg_f0(device, irb);
1299 return;
1300 }
1301 if (sense->mc == 0xf1) {
1302 /* Standard I/O Subsystem Service Information Message */
1303 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, "
1304 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
1305 device->cdev->dev.bus_id, sense->fmt.f71.sev,
1306 device->cdev->id.dev_model,
1307 sense->mc, sense->fmt.f71.emc,
1308 sense->fmt.f71.smc, sense->fmt.f71.refcode1,
1309 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
1310 tape_3590_print_io_sim_msg_f1(device, irb);
1311 return;
1312 }
1313 if (sense->mc == 0xf2) {
1314 /* Standard Device Service Information Message */
1315 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, "
1316 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
1317 device->cdev->dev.bus_id, sense->fmt.f71.sev,
1318 device->cdev->id.dev_model,
1319 sense->mc, sense->fmt.f71.emc,
1320 sense->fmt.f71.smc, sense->fmt.f71.refcode1,
1321 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
1322 tape_3590_print_dev_sim_msg_f2(device, irb);
1323 return;
1324 }
1325 if (sense->mc == 0xf3) {
1326 /* Standard Library Service Information Message */
1327 return;
1328 }
1329 PRINT_WARN("(%s): Device Message(%x)\n",
1330 device->cdev->dev.bus_id, sense->mc);
1331 }
1332
1333 static int tape_3590_crypt_error(struct tape_device *device,
1334 struct tape_request *request, struct irb *irb)
1335 {
1336 u8 cu_rc, ekm_rc1;
1337 u16 ekm_rc2;
1338 u32 drv_rc;
1339 char *bus_id, *sense;
1340
1341 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data;
1342 bus_id = device->cdev->dev.bus_id;
1343 cu_rc = sense[0];
1344 drv_rc = *((u32*) &sense[5]) & 0xffffff;
1345 ekm_rc1 = sense[9];
1346 ekm_rc2 = *((u16*) &sense[10]);
1347 if ((cu_rc == 0) && (ekm_rc2 == 0xee31))
1348 /* key not defined on EKM */
1349 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED);
1350 if ((cu_rc == 1) || (cu_rc == 2))
1351 /* No connection to EKM */
1352 return tape_3590_erp_basic(device, request, irb, -ENOTCONN);
1353
1354 PRINT_ERR("(%s): Unable to get encryption key from EKM\n", bus_id);
1355 PRINT_ERR("(%s): CU=%02X DRIVE=%06X EKM=%02X:%04X\n", bus_id, cu_rc,
1356 drv_rc, ekm_rc1, ekm_rc2);
1357
1358 return tape_3590_erp_basic(device, request, irb, -ENOKEY);
1359 }
1360
1361 /*
1362 * 3590 error Recovery routine:
1363 * If possible, it tries to recover from the error. If this is not possible,
1364 * inform the user about the problem.
1365 */
1366 static int
1367 tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
1368 struct irb *irb)
1369 {
1370 struct tape_3590_sense *sense;
1371 int rc;
1372
1373 #ifdef CONFIG_S390_TAPE_BLOCK
1374 if (request->op == TO_BLOCK) {
1375 /*
1376 * Recovery for block device requests. Set the block_position
1377 * to something invalid and retry.
1378 */
1379 device->blk_data.block_position = -1;
1380 if (request->retries-- <= 0)
1381 return tape_3590_erp_failed(device, request, irb, -EIO);
1382 else
1383 return tape_3590_erp_retry(device, request, irb);
1384 }
1385 #endif
1386
1387 sense = (struct tape_3590_sense *) irb->ecw;
1388
1389 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc);
1390
1391 /*
1392 * First check all RC-QRCs where we want to do something special
1393 * - "break": basic error recovery is done
1394 * - "goto out:": just print error message if available
1395 */
1396 rc = -EIO;
1397 switch (sense->rc_rqc) {
1398
1399 case 0x1110:
1400 tape_3590_print_era_msg(device, irb);
1401 return tape_3590_erp_read_buf_log(device, request, irb);
1402
1403 case 0x2011:
1404 tape_3590_print_era_msg(device, irb);
1405 return tape_3590_erp_read_alternate(device, request, irb);
1406
1407 case 0x2230:
1408 case 0x2231:
1409 tape_3590_print_era_msg(device, irb);
1410 return tape_3590_erp_special_interrupt(device, request, irb);
1411 case 0x2240:
1412 return tape_3590_crypt_error(device, request, irb);
1413
1414 case 0x3010:
1415 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
1416 device->cdev_id);
1417 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1418 case 0x3012:
1419 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
1420 device->cdev_id);
1421 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1422 case 0x3020:
1423 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
1424 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1425
1426 case 0x3122:
1427 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
1428 device->cdev_id);
1429 return tape_3590_erp_basic(device, request, irb, -EIO);
1430 case 0x3123:
1431 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
1432 device->cdev_id);
1433 tape_med_state_set(device, MS_UNLOADED);
1434 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1435 return tape_3590_erp_basic(device, request, irb, 0);
1436
1437 case 0x4010:
1438 /*
1439 * print additional msg since default msg
1440 * "device intervention" is not very meaningfull
1441 */
1442 PRINT_WARN("(%s): Tape operation when medium not loaded\n",
1443 device->cdev->dev.bus_id);
1444 tape_med_state_set(device, MS_UNLOADED);
1445 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1446 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1447 case 0x4012: /* Device Long Busy */
1448 /* XXX: Also use long busy handling here? */
1449 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id);
1450 tape_3590_print_era_msg(device, irb);
1451 return tape_3590_erp_basic(device, request, irb, -EBUSY);
1452 case 0x4014:
1453 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id);
1454 return tape_3590_erp_long_busy(device, request, irb);
1455
1456 case 0x5010:
1457 if (sense->rac == 0xd0) {
1458 /* Swap */
1459 tape_3590_print_era_msg(device, irb);
1460 return tape_3590_erp_swap(device, request, irb);
1461 }
1462 if (sense->rac == 0x26) {
1463 /* Read Opposite */
1464 tape_3590_print_era_msg(device, irb);
1465 return tape_3590_erp_read_opposite(device, request,
1466 irb);
1467 }
1468 return tape_3590_erp_basic(device, request, irb, -EIO);
1469 case 0x5020:
1470 case 0x5021:
1471 case 0x5022:
1472 case 0x5040:
1473 case 0x5041:
1474 case 0x5042:
1475 tape_3590_print_era_msg(device, irb);
1476 return tape_3590_erp_swap(device, request, irb);
1477
1478 case 0x5110:
1479 case 0x5111:
1480 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1481
1482 case 0x5120:
1483 case 0x1120:
1484 tape_med_state_set(device, MS_UNLOADED);
1485 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1486 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1487
1488 case 0x6020:
1489 PRINT_WARN("(%s): Cartridge of wrong type ?\n",
1490 device->cdev->dev.bus_id);
1491 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1492
1493 case 0x8011:
1494 PRINT_WARN("(%s): Another host has reserved the tape device\n",
1495 device->cdev->dev.bus_id);
1496 return tape_3590_erp_basic(device, request, irb, -EPERM);
1497 case 0x8013:
1498 PRINT_WARN("(%s): Another host has privileged access to the "
1499 "tape device\n", device->cdev->dev.bus_id);
1500 PRINT_WARN("(%s): To solve the problem unload the current "
1501 "cartridge!\n", device->cdev->dev.bus_id);
1502 return tape_3590_erp_basic(device, request, irb, -EPERM);
1503 default:
1504 return tape_3590_erp_basic(device, request, irb, -EIO);
1505 }
1506 }
1507
1508 /*
1509 * 3590 interrupt handler:
1510 */
1511 static int
1512 tape_3590_irq(struct tape_device *device, struct tape_request *request,
1513 struct irb *irb)
1514 {
1515 if (request == NULL)
1516 return tape_3590_unsolicited_irq(device, irb);
1517
1518 if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) &&
1519 (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) {
1520 /* Write at end of volume */
1521 DBF_EVENT(2, "End of volume\n");
1522 return tape_3590_erp_failed(device, request, irb, -ENOSPC);
1523 }
1524
1525 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
1526 return tape_3590_unit_check(device, request, irb);
1527
1528 if (irb->scsw.dstat & DEV_STAT_DEV_END) {
1529 if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) {
1530 if (request->op == TO_FSB || request->op == TO_BSB)
1531 request->rescnt++;
1532 else
1533 DBF_EVENT(5, "Unit Exception!\n");
1534 }
1535
1536 return tape_3590_done(device, request);
1537 }
1538
1539 if (irb->scsw.dstat & DEV_STAT_CHN_END) {
1540 DBF_EVENT(2, "cannel end\n");
1541 return TAPE_IO_PENDING;
1542 }
1543
1544 if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
1545 DBF_EVENT(2, "Unit Attention when busy..\n");
1546 return TAPE_IO_PENDING;
1547 }
1548
1549 DBF_EVENT(6, "xunknownirq\n");
1550 PRINT_ERR("Unexpected interrupt.\n");
1551 PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]);
1552 tape_dump_sense(device, request, irb);
1553 return TAPE_IO_STOP;
1554 }
1555
1556
1557 static int tape_3590_read_dev_chars(struct tape_device *device,
1558 struct tape_3590_rdc_data *rdc_data)
1559 {
1560 int rc;
1561 struct tape_request *request;
1562
1563 request = tape_alloc_request(1, sizeof(*rdc_data));
1564 if (IS_ERR(request))
1565 return PTR_ERR(request);
1566 request->op = TO_RDC;
1567 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data),
1568 request->cpdata);
1569 rc = tape_do_io(device, request);
1570 if (rc == 0)
1571 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data));
1572 tape_free_request(request);
1573 return rc;
1574 }
1575
1576 /*
1577 * Setup device function
1578 */
1579 static int
1580 tape_3590_setup_device(struct tape_device *device)
1581 {
1582 int rc;
1583 struct tape_3590_disc_data *data;
1584 struct tape_3590_rdc_data *rdc_data;
1585
1586 DBF_EVENT(6, "3590 device setup\n");
1587 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA);
1588 if (data == NULL)
1589 return -ENOMEM;
1590 data->read_back_op = READ_PREVIOUS;
1591 device->discdata = data;
1592
1593 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA);
1594 if (!rdc_data) {
1595 rc = -ENOMEM;
1596 goto fail_kmalloc;
1597 }
1598 rc = tape_3590_read_dev_chars(device, rdc_data);
1599 if (rc) {
1600 DBF_LH(3, "Read device characteristics failed!\n");
1601 goto fail_kmalloc;
1602 }
1603 rc = tape_std_assign(device);
1604 if (rc)
1605 goto fail_rdc_data;
1606 if (rdc_data->data[31] == 0x13) {
1607 PRINT_INFO("Device has crypto support\n");
1608 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK;
1609 tape_3592_disable_crypt(device);
1610 } else {
1611 DBF_EVENT(6, "Device has NO crypto support\n");
1612 }
1613 /* Try to find out if medium is loaded */
1614 rc = tape_3590_sense_medium(device);
1615 if (rc) {
1616 DBF_LH(3, "3590 medium sense returned %d\n", rc);
1617 goto fail_rdc_data;
1618 }
1619 return 0;
1620
1621 fail_rdc_data:
1622 kfree(rdc_data);
1623 fail_kmalloc:
1624 kfree(data);
1625 return rc;
1626 }
1627
1628 /*
1629 * Cleanup device function
1630 */
1631 static void
1632 tape_3590_cleanup_device(struct tape_device *device)
1633 {
1634 flush_scheduled_work();
1635 tape_std_unassign(device);
1636
1637 kfree(device->discdata);
1638 device->discdata = NULL;
1639 }
1640
1641 /*
1642 * List of 3590 magnetic tape commands.
1643 */
1644 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = {
1645 [MTRESET] = tape_std_mtreset,
1646 [MTFSF] = tape_std_mtfsf,
1647 [MTBSF] = tape_std_mtbsf,
1648 [MTFSR] = tape_std_mtfsr,
1649 [MTBSR] = tape_std_mtbsr,
1650 [MTWEOF] = tape_std_mtweof,
1651 [MTREW] = tape_std_mtrew,
1652 [MTOFFL] = tape_std_mtoffl,
1653 [MTNOP] = tape_std_mtnop,
1654 [MTRETEN] = tape_std_mtreten,
1655 [MTBSFM] = tape_std_mtbsfm,
1656 [MTFSFM] = tape_std_mtfsfm,
1657 [MTEOM] = tape_std_mteom,
1658 [MTERASE] = tape_std_mterase,
1659 [MTRAS1] = NULL,
1660 [MTRAS2] = NULL,
1661 [MTRAS3] = NULL,
1662 [MTSETBLK] = tape_std_mtsetblk,
1663 [MTSETDENSITY] = NULL,
1664 [MTSEEK] = tape_3590_mtseek,
1665 [MTTELL] = tape_3590_mttell,
1666 [MTSETDRVBUFFER] = NULL,
1667 [MTFSS] = NULL,
1668 [MTBSS] = NULL,
1669 [MTWSM] = NULL,
1670 [MTLOCK] = NULL,
1671 [MTUNLOCK] = NULL,
1672 [MTLOAD] = tape_std_mtload,
1673 [MTUNLOAD] = tape_std_mtunload,
1674 [MTCOMPRESSION] = tape_std_mtcompression,
1675 [MTSETPART] = NULL,
1676 [MTMKPART] = NULL
1677 };
1678
1679 /*
1680 * Tape discipline structure for 3590.
1681 */
1682 static struct tape_discipline tape_discipline_3590 = {
1683 .owner = THIS_MODULE,
1684 .setup_device = tape_3590_setup_device,
1685 .cleanup_device = tape_3590_cleanup_device,
1686 .process_eov = tape_std_process_eov,
1687 .irq = tape_3590_irq,
1688 .read_block = tape_std_read_block,
1689 .write_block = tape_std_write_block,
1690 #ifdef CONFIG_S390_TAPE_BLOCK
1691 .bread = tape_3590_bread,
1692 .free_bread = tape_3590_free_bread,
1693 .check_locate = tape_3590_check_locate,
1694 #endif
1695 .ioctl_fn = tape_3590_ioctl,
1696 .mtop_array = tape_3590_mtop
1697 };
1698
1699 static struct ccw_device_id tape_3590_ids[] = {
1700 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},
1701 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},
1702 { /* end of list */ }
1703 };
1704
1705 static int
1706 tape_3590_online(struct ccw_device *cdev)
1707 {
1708 return tape_generic_online(cdev->dev.driver_data,
1709 &tape_discipline_3590);
1710 }
1711
1712 static int
1713 tape_3590_offline(struct ccw_device *cdev)
1714 {
1715 return tape_generic_offline(cdev->dev.driver_data);
1716 }
1717
1718 static struct ccw_driver tape_3590_driver = {
1719 .name = "tape_3590",
1720 .owner = THIS_MODULE,
1721 .ids = tape_3590_ids,
1722 .probe = tape_generic_probe,
1723 .remove = tape_generic_remove,
1724 .set_offline = tape_3590_offline,
1725 .set_online = tape_3590_online,
1726 };
1727
1728 /*
1729 * Setup discipline structure.
1730 */
1731 static int
1732 tape_3590_init(void)
1733 {
1734 int rc;
1735
1736 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));
1737 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
1738 #ifdef DBF_LIKE_HELL
1739 debug_set_level(TAPE_DBF_AREA, 6);
1740 #endif
1741
1742 DBF_EVENT(3, "3590 init\n");
1743 /* Register driver for 3590 tapes. */
1744 rc = ccw_driver_register(&tape_3590_driver);
1745 if (rc)
1746 DBF_EVENT(3, "3590 init failed\n");
1747 else
1748 DBF_EVENT(3, "3590 registered\n");
1749 return rc;
1750 }
1751
1752 static void
1753 tape_3590_exit(void)
1754 {
1755 ccw_driver_unregister(&tape_3590_driver);
1756
1757 debug_unregister(TAPE_DBF_AREA);
1758 }
1759
1760 MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
1761 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
1762 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
1763 MODULE_LICENSE("GPL");
1764
1765 module_init(tape_3590_init);
1766 module_exit(tape_3590_exit);
WRT350N Kernel Patches