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Revert "[PATCH] paravirt: Add startup infrastructure for paravirtualization"
[pv_ops_mirror.git] / drivers / s390 / char / tape_3590.c
blob7e2b2ab492641a53aea103845ffe9f1b8c1a6ad8
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, i;
627 unsigned off;
628 char *dst;
629 struct bio_vec *bv;
630 struct bio *bio;
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_bio(bio, req) {
637 bio_for_each_segment(bv, bio, i) {
638 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
639 }
640 }
641 request = tape_alloc_request(2 + count + 1, 4);
642 if (IS_ERR(request))
643 return request;
644 request->op = TO_BLOCK;
645 *(__u32 *) request->cpdata = start_block;
646 ccw = request->cpaddr;
647 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte);
648
649 /*
650 * We always setup a nop after the mode set ccw. This slot is
651 * used in tape_std_check_locate to insert a locate ccw if the
652 * current tape position doesn't match the start block to be read.
653 */
654 ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
655
656 rq_for_each_bio(bio, req) {
657 bio_for_each_segment(bv, bio, i) {
658 dst = page_address(bv->bv_page) + bv->bv_offset;
659 for (off = 0; off < bv->bv_len;
660 off += TAPEBLOCK_HSEC_SIZE) {
661 ccw->flags = CCW_FLAG_CC;
662 ccw->cmd_code = READ_FORWARD;
663 ccw->count = TAPEBLOCK_HSEC_SIZE;
664 set_normalized_cda(ccw, (void *) __pa(dst));
665 ccw++;
666 dst += TAPEBLOCK_HSEC_SIZE;
667 }
668 if (off > bv->bv_len)
669 BUG();
670 }
671 }
672 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
673 DBF_EVENT(6, "xBREDccwg\n");
674 return request;
675 }
676
677 static void
678 tape_3590_free_bread(struct tape_request *request)
679 {
680 struct ccw1 *ccw;
681
682 /* Last ccw is a nop and doesn't need clear_normalized_cda */
683 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++)
684 if (ccw->cmd_code == READ_FORWARD)
685 clear_normalized_cda(ccw);
686 tape_free_request(request);
687 }
688
689 /*
690 * check_locate is called just before the tape request is passed to
691 * the common io layer for execution. It has to check the current
692 * tape position and insert a locate ccw if it doesn't match the
693 * start block for the request.
694 */
695 static void
696 tape_3590_check_locate(struct tape_device *device, struct tape_request *request)
697 {
698 __u32 *start_block;
699
700 start_block = (__u32 *) request->cpdata;
701 if (*start_block != device->blk_data.block_position) {
702 /* Add the start offset of the file to get the real block. */
703 *start_block += device->bof;
704 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
705 }
706 }
707 #endif
708
709 static void tape_3590_med_state_set(struct tape_device *device,
710 struct tape_3590_med_sense *sense)
711 {
712 struct tape390_crypt_info *c_info;
713
714 c_info = &TAPE_3590_CRYPT_INFO(device);
715
716 if (sense->masst == MSENSE_UNASSOCIATED) {
717 tape_med_state_set(device, MS_UNLOADED);
718 TAPE_3590_CRYPT_INFO(device).medium_status = 0;
719 return;
720 }
721 if (sense->masst != MSENSE_ASSOCIATED_MOUNT) {
722 PRINT_ERR("Unknown medium state: %x\n", sense->masst);
723 return;
724 }
725 tape_med_state_set(device, MS_LOADED);
726 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK;
727 if (sense->flags & MSENSE_CRYPT_MASK) {
728 PRINT_INFO("Medium is encrypted (%04x)\n", sense->flags);
729 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK;
730 } else {
731 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags);
732 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK;
733 }
734 }
735
736 /*
737 * The done handler is called at device/channel end and wakes up the sleeping
738 * process
739 */
740 static int
741 tape_3590_done(struct tape_device *device, struct tape_request *request)
742 {
743 struct tape_3590_disc_data *disc_data;
744
745 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
746 disc_data = device->discdata;
747
748 switch (request->op) {
749 case TO_BSB:
750 case TO_BSF:
751 case TO_DSE:
752 case TO_FSB:
753 case TO_FSF:
754 case TO_LBL:
755 case TO_RFO:
756 case TO_RBA:
757 case TO_REW:
758 case TO_WRI:
759 case TO_WTM:
760 case TO_BLOCK:
761 case TO_LOAD:
762 tape_med_state_set(device, MS_LOADED);
763 break;
764 case TO_RUN:
765 tape_med_state_set(device, MS_UNLOADED);
766 tape_3590_schedule_work(device, TO_CRYPT_OFF);
767 break;
768 case TO_MSEN:
769 tape_3590_med_state_set(device, request->cpdata);
770 break;
771 case TO_CRYPT_ON:
772 TAPE_3590_CRYPT_INFO(device).status
773 |= TAPE390_CRYPT_ON_MASK;
774 *(device->modeset_byte) |= 0x03;
775 break;
776 case TO_CRYPT_OFF:
777 TAPE_3590_CRYPT_INFO(device).status
778 &= ~TAPE390_CRYPT_ON_MASK;
779 *(device->modeset_byte) &= ~0x03;
780 break;
781 case TO_RBI: /* RBI seems to succeed even without medium loaded. */
782 case TO_NOP: /* Same to NOP. */
783 case TO_READ_CONFIG:
784 case TO_READ_ATTMSG:
785 case TO_DIS:
786 case TO_ASSIGN:
787 case TO_UNASSIGN:
788 case TO_SIZE:
789 case TO_KEKL_SET:
790 case TO_KEKL_QUERY:
791 case TO_RDC:
792 break;
793 }
794 return TAPE_IO_SUCCESS;
795 }
796
797 /*
798 * This fuction is called, when error recovery was successfull
799 */
800 static inline int
801 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
802 {
803 DBF_EVENT(3, "Error Recovery successfull for %s\n",
804 tape_op_verbose[request->op]);
805 return tape_3590_done(device, request);
806 }
807
808 /*
809 * This fuction is called, when error recovery was not successfull
810 */
811 static inline int
812 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
813 struct irb *irb, int rc)
814 {
815 DBF_EVENT(3, "Error Recovery failed for %s\n",
816 tape_op_verbose[request->op]);
817 tape_dump_sense_dbf(device, request, irb);
818 return rc;
819 }
820
821 /*
822 * Error Recovery do retry
823 */
824 static inline int
825 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
826 struct irb *irb)
827 {
828 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
829 tape_dump_sense_dbf(device, request, irb);
830 return TAPE_IO_RETRY;
831 }
832
833 /*
834 * Handle unsolicited interrupts
835 */
836 static int
837 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
838 {
839 if (irb->scsw.dstat == DEV_STAT_CHN_END)
840 /* Probably result of halt ssch */
841 return TAPE_IO_PENDING;
842 else if (irb->scsw.dstat == 0x85)
843 /* Device Ready -> check medium state */
844 tape_3590_schedule_work(device, TO_MSEN);
845 else if (irb->scsw.dstat & DEV_STAT_ATTENTION)
846 tape_3590_schedule_work(device, TO_READ_ATTMSG);
847 else {
848 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
849 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
850 tape_dump_sense(device, NULL, irb);
851 }
852 return TAPE_IO_SUCCESS;
853 }
854
855 /*
856 * Basic Recovery routine
857 */
858 static int
859 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
860 struct irb *irb, int rc)
861 {
862 struct tape_3590_sense *sense;
863
864 sense = (struct tape_3590_sense *) irb->ecw;
865
866 switch (sense->bra) {
867 case SENSE_BRA_PER:
868 return tape_3590_erp_failed(device, request, irb, rc);
869 case SENSE_BRA_CONT:
870 return tape_3590_erp_succeded(device, request);
871 case SENSE_BRA_RE:
872 return tape_3590_erp_retry(device, request, irb);
873 case SENSE_BRA_DRE:
874 return tape_3590_erp_failed(device, request, irb, rc);
875 default:
876 PRINT_ERR("Unknown BRA %x - This should not happen!\n",
877 sense->bra);
878 BUG();
879 return TAPE_IO_STOP;
880 }
881 }
882
883 /*
884 * RDL: Read Device (buffered) log
885 */
886 static int
887 tape_3590_erp_read_buf_log(struct tape_device *device,
888 struct tape_request *request, struct irb *irb)
889 {
890 /*
891 * We just do the basic error recovery at the moment (retry).
892 * Perhaps in the future, we read the log and dump it somewhere...
893 */
894 return tape_3590_erp_basic(device, request, irb, -EIO);
895 }
896
897 /*
898 * SWAP: Swap Devices
899 */
900 static int
901 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
902 struct irb *irb)
903 {
904 /*
905 * This error recovery should swap the tapes
906 * if the original has a problem. The operation
907 * should proceed with the new tape... this
908 * should probably be done in user space!
909 */
910 PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id);
911 return tape_3590_erp_basic(device, request, irb, -EIO);
912 }
913
914 /*
915 * LBY: Long Busy
916 */
917 static int
918 tape_3590_erp_long_busy(struct tape_device *device,
919 struct tape_request *request, struct irb *irb)
920 {
921 DBF_EVENT(6, "Device is busy\n");
922 return TAPE_IO_LONG_BUSY;
923 }
924
925 /*
926 * SPI: Special Intercept
927 */
928 static int
929 tape_3590_erp_special_interrupt(struct tape_device *device,
930 struct tape_request *request, struct irb *irb)
931 {
932 return tape_3590_erp_basic(device, request, irb, -EIO);
933 }
934
935 /*
936 * RDA: Read Alternate
937 */
938 static int
939 tape_3590_erp_read_alternate(struct tape_device *device,
940 struct tape_request *request, struct irb *irb)
941 {
942 struct tape_3590_disc_data *data;
943
944 /*
945 * The issued Read Backward or Read Previous command is not
946 * supported by the device
947 * The recovery action should be to issue another command:
948 * Read Revious: if Read Backward is not supported
949 * Read Backward: if Read Previous is not supported
950 */
951 data = device->discdata;
952 if (data->read_back_op == READ_PREVIOUS) {
953 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
954 device->cdev_id);
955 data->read_back_op = READ_BACKWARD;
956 } else {
957 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
958 device->cdev_id);
959 data->read_back_op = READ_PREVIOUS;
960 }
961 tape_3590_read_opposite(device, request);
962 return tape_3590_erp_retry(device, request, irb);
963 }
964
965 /*
966 * Error Recovery read opposite
967 */
968 static int
969 tape_3590_erp_read_opposite(struct tape_device *device,
970 struct tape_request *request, struct irb *irb)
971 {
972 switch (request->op) {
973 case TO_RFO:
974 /*
975 * We did read forward, but the data could not be read.
976 * We will read backward and then skip forward again.
977 */
978 tape_3590_read_opposite(device, request);
979 return tape_3590_erp_retry(device, request, irb);
980 case TO_RBA:
981 /* We tried to read forward and backward, but hat no success */
982 return tape_3590_erp_failed(device, request, irb, -EIO);
983 break;
984 default:
985 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n",
986 tape_op_verbose[request->op]);
987 return tape_3590_erp_failed(device, request, irb, -EIO);
988 }
989 }
990
991 /*
992 * Print an MIM (Media Information Message) (message code f0)
993 */
994 static void
995 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
996 {
997 struct tape_3590_sense *sense;
998
999 sense = (struct tape_3590_sense *) irb->ecw;
1000 /* Exception Message */
1001 switch (sense->fmt.f70.emc) {
1002 case 0x02:
1003 PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id);
1004 break;
1005 case 0x03:
1006 PRINT_WARN("(%s): Data degraded in partion %i\n",
1007 device->cdev->dev.bus_id, sense->fmt.f70.mp);
1008 break;
1009 case 0x04:
1010 PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id);
1011 break;
1012 case 0x05:
1013 PRINT_WARN("(%s): Medium degraded in partition %i\n",
1014 device->cdev->dev.bus_id, sense->fmt.f70.mp);
1015 break;
1016 case 0x06:
1017 PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id);
1018 break;
1019 case 0x07:
1020 PRINT_WARN("(%s): Medium Exception 0x%02x\n",
1021 device->cdev->dev.bus_id, sense->fmt.f70.md);
1022 break;
1023 default:
1024 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n",
1025 device->cdev->dev.bus_id, sense->fmt.f70.emc);
1026 break;
1027 }
1028 /* Service Message */
1029 switch (sense->fmt.f70.smc) {
1030 case 0x02:
1031 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n",
1032 device->cdev->dev.bus_id, sense->fmt.f70.md);
1033 break;
1034 default:
1035 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n",
1036 device->cdev->dev.bus_id, sense->fmt.f70.smc);
1037 break;
1038 }
1039 }
1040
1041 /*
1042 * Print an I/O Subsystem Service Information Message (message code f1)
1043 */
1044 static void
1045 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
1046 {
1047 struct tape_3590_sense *sense;
1048
1049 sense = (struct tape_3590_sense *) irb->ecw;
1050 /* Exception Message */
1051 switch (sense->fmt.f71.emc) {
1052 case 0x01:
1053 PRINT_WARN("(%s): Effect of failure is unknown\n",
1054 device->cdev->dev.bus_id);
1055 break;
1056 case 0x02:
1057 PRINT_WARN("(%s): CU Exception - no performance impact\n",
1058 device->cdev->dev.bus_id);
1059 break;
1060 case 0x03:
1061 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n",
1062 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1063 break;
1064 case 0x04:
1065 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n",
1066 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1067 break;
1068 case 0x05:
1069 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n",
1070 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1071 break;
1072 case 0x06:
1073 PRINT_WARN("(%s): CU Exception on node 0x%02x\n",
1074 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1075 break;
1076 case 0x07:
1077 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n",
1078 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1079 break;
1080 default:
1081 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n",
1082 device->cdev->dev.bus_id, sense->fmt.f71.emc);
1083 }
1084 /* Service Message */
1085 switch (sense->fmt.f71.smc) {
1086 case 0x01:
1087 PRINT_WARN("(%s): Repair impact is unknown\n",
1088 device->cdev->dev.bus_id);
1089 break;
1090 case 0x02:
1091 PRINT_WARN("(%s): Repair will not impact cu performance\n",
1092 device->cdev->dev.bus_id);
1093 break;
1094 case 0x03:
1095 if (sense->fmt.f71.mdf == 0)
1096 PRINT_WARN("(%s): Repair will disable node "
1097 "0x%x on CU\n",
1098 device->cdev->dev.bus_id,
1099 sense->fmt.f71.md[1]);
1100 else
1101 PRINT_WARN("(%s): Repair will disable nodes "
1102 "(0x%x-0x%x) on CU\n",
1103 device->cdev->dev.bus_id,
1104 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1105 break;
1106 case 0x04:
1107 if (sense->fmt.f71.mdf == 0)
1108 PRINT_WARN("(%s): Repair will disable cannel path "
1109 "0x%x on CU\n",
1110 device->cdev->dev.bus_id,
1111 sense->fmt.f71.md[1]);
1112 else
1113 PRINT_WARN("(%s): Repair will disable cannel paths "
1114 "(0x%x-0x%x) on CU\n",
1115 device->cdev->dev.bus_id,
1116 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1117 break;
1118 case 0x05:
1119 if (sense->fmt.f71.mdf == 0)
1120 PRINT_WARN("(%s): Repair will disable device path "
1121 "0x%x on CU\n",
1122 device->cdev->dev.bus_id,
1123 sense->fmt.f71.md[1]);
1124 else
1125 PRINT_WARN("(%s): Repair will disable device paths "
1126 "(0x%x-0x%x) on CU\n",
1127 device->cdev->dev.bus_id,
1128 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1129 break;
1130 case 0x06:
1131 if (sense->fmt.f71.mdf == 0)
1132 PRINT_WARN("(%s): Repair will disable library path "
1133 "0x%x on CU\n",
1134 device->cdev->dev.bus_id,
1135 sense->fmt.f71.md[1]);
1136 else
1137 PRINT_WARN("(%s): Repair will disable library paths "
1138 "(0x%x-0x%x) on CU\n",
1139 device->cdev->dev.bus_id,
1140 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1141 break;
1142 case 0x07:
1143 PRINT_WARN("(%s): Repair will disable access to CU\n",
1144 device->cdev->dev.bus_id);
1145 break;
1146 default:
1147 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n",
1148 device->cdev->dev.bus_id, sense->fmt.f71.smc);
1149 }
1150 }
1151
1152 /*
1153 * Print an Device Subsystem Service Information Message (message code f2)
1154 */
1155 static void
1156 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
1157 {
1158 struct tape_3590_sense *sense;
1159
1160 sense = (struct tape_3590_sense *) irb->ecw;
1161 /* Exception Message */
1162 switch (sense->fmt.f71.emc) {
1163 case 0x01:
1164 PRINT_WARN("(%s): Effect of failure is unknown\n",
1165 device->cdev->dev.bus_id);
1166 break;
1167 case 0x02:
1168 PRINT_WARN("(%s): DV Exception - no performance impact\n",
1169 device->cdev->dev.bus_id);
1170 break;
1171 case 0x03:
1172 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n",
1173 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1174 break;
1175 case 0x04:
1176 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n",
1177 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1178 break;
1179 case 0x05:
1180 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n",
1181 device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
1182 break;
1183 case 0x06:
1184 PRINT_WARN("(%s): DV Exception in tape path\n",
1185 device->cdev->dev.bus_id);
1186 break;
1187 case 0x07:
1188 PRINT_WARN("(%s): DV Exception in drive\n",
1189 device->cdev->dev.bus_id);
1190 break;
1191 default:
1192 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n",
1193 device->cdev->dev.bus_id, sense->fmt.f71.emc);
1194 }
1195 /* Service Message */
1196 switch (sense->fmt.f71.smc) {
1197 case 0x01:
1198 PRINT_WARN("(%s): Repair impact is unknown\n",
1199 device->cdev->dev.bus_id);
1200 break;
1201 case 0x02:
1202 PRINT_WARN("(%s): Repair will not impact device performance\n",
1203 device->cdev->dev.bus_id);
1204 break;
1205 case 0x03:
1206 if (sense->fmt.f71.mdf == 0)
1207 PRINT_WARN("(%s): Repair will disable channel path "
1208 "0x%x on DV\n",
1209 device->cdev->dev.bus_id,
1210 sense->fmt.f71.md[1]);
1211 else
1212 PRINT_WARN("(%s): Repair will disable channel path "
1213 "(0x%x-0x%x) on DV\n",
1214 device->cdev->dev.bus_id,
1215 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1216 break;
1217 case 0x04:
1218 if (sense->fmt.f71.mdf == 0)
1219 PRINT_WARN("(%s): Repair will disable interface 0x%x "
1220 "on DV\n",
1221 device->cdev->dev.bus_id,
1222 sense->fmt.f71.md[1]);
1223 else
1224 PRINT_WARN("(%s): Repair will disable interfaces "
1225 "(0x%x-0x%x) on DV\n",
1226 device->cdev->dev.bus_id,
1227 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1228 break;
1229 case 0x05:
1230 if (sense->fmt.f71.mdf == 0)
1231 PRINT_WARN("(%s): Repair will disable loader 0x%x "
1232 "on DV\n",
1233 device->cdev->dev.bus_id,
1234 sense->fmt.f71.md[1]);
1235 else
1236 PRINT_WARN("(%s): Repair will disable loader "
1237 "(0x%x-0x%x) on DV\n",
1238 device->cdev->dev.bus_id,
1239 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1240 break;
1241 case 0x07:
1242 PRINT_WARN("(%s): Repair will disable access to DV\n",
1243 device->cdev->dev.bus_id);
1244 break;
1245 case 0x08:
1246 if (sense->fmt.f71.mdf == 0)
1247 PRINT_WARN("(%s): Repair will disable message "
1248 "display 0x%x on DV\n",
1249 device->cdev->dev.bus_id,
1250 sense->fmt.f71.md[1]);
1251 else
1252 PRINT_WARN("(%s): Repair will disable message "
1253 "displays (0x%x-0x%x) on DV\n",
1254 device->cdev->dev.bus_id,
1255 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1256 break;
1257 case 0x09:
1258 PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id);
1259 break;
1260 default:
1261 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n",
1262 device->cdev->dev.bus_id, sense->fmt.f71.smc);
1263 }
1264 }
1265
1266 /*
1267 * Print standard ERA Message
1268 */
1269 static void
1270 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
1271 {
1272 struct tape_3590_sense *sense;
1273
1274 sense = (struct tape_3590_sense *) irb->ecw;
1275 if (sense->mc == 0)
1276 return;
1277 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
1278 if (tape_3590_msg[sense->mc] != NULL)
1279 PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id,
1280 tape_3590_msg[sense->mc]);
1281 else {
1282 PRINT_WARN("(%s): Message Code 0x%x\n",
1283 device->cdev->dev.bus_id, sense->mc);
1284 }
1285 return;
1286 }
1287 if (sense->mc == 0xf0) {
1288 /* Standard Media Information Message */
1289 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, "
1290 "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id,
1291 sense->fmt.f70.sev, sense->mc,
1292 sense->fmt.f70.emc, sense->fmt.f70.smc,
1293 sense->fmt.f70.refcode, sense->fmt.f70.mid,
1294 sense->fmt.f70.fid);
1295 tape_3590_print_mim_msg_f0(device, irb);
1296 return;
1297 }
1298 if (sense->mc == 0xf1) {
1299 /* Standard I/O Subsystem Service Information Message */
1300 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, "
1301 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
1302 device->cdev->dev.bus_id, sense->fmt.f71.sev,
1303 device->cdev->id.dev_model,
1304 sense->mc, sense->fmt.f71.emc,
1305 sense->fmt.f71.smc, sense->fmt.f71.refcode1,
1306 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
1307 tape_3590_print_io_sim_msg_f1(device, irb);
1308 return;
1309 }
1310 if (sense->mc == 0xf2) {
1311 /* Standard Device Service Information Message */
1312 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, "
1313 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
1314 device->cdev->dev.bus_id, sense->fmt.f71.sev,
1315 device->cdev->id.dev_model,
1316 sense->mc, sense->fmt.f71.emc,
1317 sense->fmt.f71.smc, sense->fmt.f71.refcode1,
1318 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
1319 tape_3590_print_dev_sim_msg_f2(device, irb);
1320 return;
1321 }
1322 if (sense->mc == 0xf3) {
1323 /* Standard Library Service Information Message */
1324 return;
1325 }
1326 PRINT_WARN("(%s): Device Message(%x)\n",
1327 device->cdev->dev.bus_id, sense->mc);
1328 }
1329
1330 static int tape_3590_crypt_error(struct tape_device *device,
1331 struct tape_request *request, struct irb *irb)
1332 {
1333 u8 cu_rc, ekm_rc1;
1334 u16 ekm_rc2;
1335 u32 drv_rc;
1336 char *bus_id, *sense;
1337
1338 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data;
1339 bus_id = device->cdev->dev.bus_id;
1340 cu_rc = sense[0];
1341 drv_rc = *((u32*) &sense[5]) & 0xffffff;
1342 ekm_rc1 = sense[9];
1343 ekm_rc2 = *((u16*) &sense[10]);
1344 if ((cu_rc == 0) && (ekm_rc2 == 0xee31))
1345 /* key not defined on EKM */
1346 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED);
1347 if ((cu_rc == 1) || (cu_rc == 2))
1348 /* No connection to EKM */
1349 return tape_3590_erp_basic(device, request, irb, -ENOTCONN);
1350
1351 PRINT_ERR("(%s): Unable to get encryption key from EKM\n", bus_id);
1352 PRINT_ERR("(%s): CU=%02X DRIVE=%06X EKM=%02X:%04X\n", bus_id, cu_rc,
1353 drv_rc, ekm_rc1, ekm_rc2);
1354
1355 return tape_3590_erp_basic(device, request, irb, -ENOKEY);
1356 }
1357
1358 /*
1359 * 3590 error Recovery routine:
1360 * If possible, it tries to recover from the error. If this is not possible,
1361 * inform the user about the problem.
1362 */
1363 static int
1364 tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
1365 struct irb *irb)
1366 {
1367 struct tape_3590_sense *sense;
1368 int rc;
1369
1370 #ifdef CONFIG_S390_TAPE_BLOCK
1371 if (request->op == TO_BLOCK) {
1372 /*
1373 * Recovery for block device requests. Set the block_position
1374 * to something invalid and retry.
1375 */
1376 device->blk_data.block_position = -1;
1377 if (request->retries-- <= 0)
1378 return tape_3590_erp_failed(device, request, irb, -EIO);
1379 else
1380 return tape_3590_erp_retry(device, request, irb);
1381 }
1382 #endif
1383
1384 sense = (struct tape_3590_sense *) irb->ecw;
1385
1386 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc);
1387
1388 /*
1389 * First check all RC-QRCs where we want to do something special
1390 * - "break": basic error recovery is done
1391 * - "goto out:": just print error message if available
1392 */
1393 rc = -EIO;
1394 switch (sense->rc_rqc) {
1395
1396 case 0x1110:
1397 tape_3590_print_era_msg(device, irb);
1398 return tape_3590_erp_read_buf_log(device, request, irb);
1399
1400 case 0x2011:
1401 tape_3590_print_era_msg(device, irb);
1402 return tape_3590_erp_read_alternate(device, request, irb);
1403
1404 case 0x2230:
1405 case 0x2231:
1406 tape_3590_print_era_msg(device, irb);
1407 return tape_3590_erp_special_interrupt(device, request, irb);
1408 case 0x2240:
1409 return tape_3590_crypt_error(device, request, irb);
1410
1411 case 0x3010:
1412 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
1413 device->cdev_id);
1414 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1415 case 0x3012:
1416 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
1417 device->cdev_id);
1418 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1419 case 0x3020:
1420 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
1421 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1422
1423 case 0x3122:
1424 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
1425 device->cdev_id);
1426 return tape_3590_erp_basic(device, request, irb, -EIO);
1427 case 0x3123:
1428 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
1429 device->cdev_id);
1430 tape_med_state_set(device, MS_UNLOADED);
1431 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1432 return tape_3590_erp_basic(device, request, irb, 0);
1433
1434 case 0x4010:
1435 /*
1436 * print additional msg since default msg
1437 * "device intervention" is not very meaningfull
1438 */
1439 PRINT_WARN("(%s): Tape operation when medium not loaded\n",
1440 device->cdev->dev.bus_id);
1441 tape_med_state_set(device, MS_UNLOADED);
1442 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1443 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1444 case 0x4012: /* Device Long Busy */
1445 /* XXX: Also use long busy handling here? */
1446 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id);
1447 tape_3590_print_era_msg(device, irb);
1448 return tape_3590_erp_basic(device, request, irb, -EBUSY);
1449 case 0x4014:
1450 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id);
1451 return tape_3590_erp_long_busy(device, request, irb);
1452
1453 case 0x5010:
1454 if (sense->rac == 0xd0) {
1455 /* Swap */
1456 tape_3590_print_era_msg(device, irb);
1457 return tape_3590_erp_swap(device, request, irb);
1458 }
1459 if (sense->rac == 0x26) {
1460 /* Read Opposite */
1461 tape_3590_print_era_msg(device, irb);
1462 return tape_3590_erp_read_opposite(device, request,
1463 irb);
1464 }
1465 return tape_3590_erp_basic(device, request, irb, -EIO);
1466 case 0x5020:
1467 case 0x5021:
1468 case 0x5022:
1469 case 0x5040:
1470 case 0x5041:
1471 case 0x5042:
1472 tape_3590_print_era_msg(device, irb);
1473 return tape_3590_erp_swap(device, request, irb);
1474
1475 case 0x5110:
1476 case 0x5111:
1477 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1478
1479 case 0x5120:
1480 case 0x1120:
1481 tape_med_state_set(device, MS_UNLOADED);
1482 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1483 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1484
1485 case 0x6020:
1486 PRINT_WARN("(%s): Cartridge of wrong type ?\n",
1487 device->cdev->dev.bus_id);
1488 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1489
1490 case 0x8011:
1491 PRINT_WARN("(%s): Another host has reserved the tape device\n",
1492 device->cdev->dev.bus_id);
1493 return tape_3590_erp_basic(device, request, irb, -EPERM);
1494 case 0x8013:
1495 PRINT_WARN("(%s): Another host has priviliged access to the "
1496 "tape device\n", device->cdev->dev.bus_id);
1497 PRINT_WARN("(%s): To solve the problem unload the current "
1498 "cartridge!\n", device->cdev->dev.bus_id);
1499 return tape_3590_erp_basic(device, request, irb, -EPERM);
1500 default:
1501 return tape_3590_erp_basic(device, request, irb, -EIO);
1502 }
1503 }
1504
1505 /*
1506 * 3590 interrupt handler:
1507 */
1508 static int
1509 tape_3590_irq(struct tape_device *device, struct tape_request *request,
1510 struct irb *irb)
1511 {
1512 if (request == NULL)
1513 return tape_3590_unsolicited_irq(device, irb);
1514
1515 if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) &&
1516 (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) {
1517 /* Write at end of volume */
1518 DBF_EVENT(2, "End of volume\n");
1519 return tape_3590_erp_failed(device, request, irb, -ENOSPC);
1520 }
1521
1522 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
1523 return tape_3590_unit_check(device, request, irb);
1524
1525 if (irb->scsw.dstat & DEV_STAT_DEV_END) {
1526 if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) {
1527 if (request->op == TO_FSB || request->op == TO_BSB)
1528 request->rescnt++;
1529 else
1530 DBF_EVENT(5, "Unit Exception!\n");
1531 }
1532
1533 return tape_3590_done(device, request);
1534 }
1535
1536 if (irb->scsw.dstat & DEV_STAT_CHN_END) {
1537 DBF_EVENT(2, "cannel end\n");
1538 return TAPE_IO_PENDING;
1539 }
1540
1541 if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
1542 DBF_EVENT(2, "Unit Attention when busy..\n");
1543 return TAPE_IO_PENDING;
1544 }
1545
1546 DBF_EVENT(6, "xunknownirq\n");
1547 PRINT_ERR("Unexpected interrupt.\n");
1548 PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]);
1549 tape_dump_sense(device, request, irb);
1550 return TAPE_IO_STOP;
1551 }
1552
1553
1554 static int tape_3590_read_dev_chars(struct tape_device *device,
1555 struct tape_3590_rdc_data *rdc_data)
1556 {
1557 int rc;
1558 struct tape_request *request;
1559
1560 request = tape_alloc_request(1, sizeof(*rdc_data));
1561 if (IS_ERR(request))
1562 return PTR_ERR(request);
1563 request->op = TO_RDC;
1564 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data),
1565 request->cpdata);
1566 rc = tape_do_io(device, request);
1567 if (rc == 0)
1568 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data));
1569 tape_free_request(request);
1570 return rc;
1571 }
1572
1573 /*
1574 * Setup device function
1575 */
1576 static int
1577 tape_3590_setup_device(struct tape_device *device)
1578 {
1579 int rc;
1580 struct tape_3590_disc_data *data;
1581 struct tape_3590_rdc_data *rdc_data;
1582
1583 DBF_EVENT(6, "3590 device setup\n");
1584 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA);
1585 if (data == NULL)
1586 return -ENOMEM;
1587 data->read_back_op = READ_PREVIOUS;
1588 device->discdata = data;
1589
1590 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA);
1591 if (!rdc_data) {
1592 rc = -ENOMEM;
1593 goto fail_kmalloc;
1594 }
1595 rc = tape_3590_read_dev_chars(device, rdc_data);
1596 if (rc) {
1597 DBF_LH(3, "Read device characteristics failed!\n");
1598 goto fail_kmalloc;
1599 }
1600 rc = tape_std_assign(device);
1601 if (rc)
1602 goto fail_rdc_data;
1603 if (rdc_data->data[31] == 0x13) {
1604 PRINT_INFO("Device has crypto support\n");
1605 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK;
1606 tape_3592_disable_crypt(device);
1607 } else {
1608 DBF_EVENT(6, "Device has NO crypto support\n");
1609 }
1610 /* Try to find out if medium is loaded */
1611 rc = tape_3590_sense_medium(device);
1612 if (rc) {
1613 DBF_LH(3, "3590 medium sense returned %d\n", rc);
1614 goto fail_rdc_data;
1615 }
1616 return 0;
1617
1618 fail_rdc_data:
1619 kfree(rdc_data);
1620 fail_kmalloc:
1621 kfree(data);
1622 return rc;
1623 }
1624
1625 /*
1626 * Cleanup device function
1627 */
1628 static void
1629 tape_3590_cleanup_device(struct tape_device *device)
1630 {
1631 flush_scheduled_work();
1632 tape_std_unassign(device);
1633
1634 kfree(device->discdata);
1635 device->discdata = NULL;
1636 }
1637
1638 /*
1639 * List of 3590 magnetic tape commands.
1640 */
1641 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = {
1642 [MTRESET] = tape_std_mtreset,
1643 [MTFSF] = tape_std_mtfsf,
1644 [MTBSF] = tape_std_mtbsf,
1645 [MTFSR] = tape_std_mtfsr,
1646 [MTBSR] = tape_std_mtbsr,
1647 [MTWEOF] = tape_std_mtweof,
1648 [MTREW] = tape_std_mtrew,
1649 [MTOFFL] = tape_std_mtoffl,
1650 [MTNOP] = tape_std_mtnop,
1651 [MTRETEN] = tape_std_mtreten,
1652 [MTBSFM] = tape_std_mtbsfm,
1653 [MTFSFM] = tape_std_mtfsfm,
1654 [MTEOM] = tape_std_mteom,
1655 [MTERASE] = tape_std_mterase,
1656 [MTRAS1] = NULL,
1657 [MTRAS2] = NULL,
1658 [MTRAS3] = NULL,
1659 [MTSETBLK] = tape_std_mtsetblk,
1660 [MTSETDENSITY] = NULL,
1661 [MTSEEK] = tape_3590_mtseek,
1662 [MTTELL] = tape_3590_mttell,
1663 [MTSETDRVBUFFER] = NULL,
1664 [MTFSS] = NULL,
1665 [MTBSS] = NULL,
1666 [MTWSM] = NULL,
1667 [MTLOCK] = NULL,
1668 [MTUNLOCK] = NULL,
1669 [MTLOAD] = tape_std_mtload,
1670 [MTUNLOAD] = tape_std_mtunload,
1671 [MTCOMPRESSION] = tape_std_mtcompression,
1672 [MTSETPART] = NULL,
1673 [MTMKPART] = NULL
1674 };
1675
1676 /*
1677 * Tape discipline structure for 3590.
1678 */
1679 static struct tape_discipline tape_discipline_3590 = {
1680 .owner = THIS_MODULE,
1681 .setup_device = tape_3590_setup_device,
1682 .cleanup_device = tape_3590_cleanup_device,
1683 .process_eov = tape_std_process_eov,
1684 .irq = tape_3590_irq,
1685 .read_block = tape_std_read_block,
1686 .write_block = tape_std_write_block,
1687 #ifdef CONFIG_S390_TAPE_BLOCK
1688 .bread = tape_3590_bread,
1689 .free_bread = tape_3590_free_bread,
1690 .check_locate = tape_3590_check_locate,
1691 #endif
1692 .ioctl_fn = tape_3590_ioctl,
1693 .mtop_array = tape_3590_mtop
1694 };
1695
1696 static struct ccw_device_id tape_3590_ids[] = {
1697 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},
1698 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},
1699 { /* end of list */ }
1700 };
1701
1702 static int
1703 tape_3590_online(struct ccw_device *cdev)
1704 {
1705 return tape_generic_online(cdev->dev.driver_data,
1706 &tape_discipline_3590);
1707 }
1708
1709 static int
1710 tape_3590_offline(struct ccw_device *cdev)
1711 {
1712 return tape_generic_offline(cdev->dev.driver_data);
1713 }
1714
1715 static struct ccw_driver tape_3590_driver = {
1716 .name = "tape_3590",
1717 .owner = THIS_MODULE,
1718 .ids = tape_3590_ids,
1719 .probe = tape_generic_probe,
1720 .remove = tape_generic_remove,
1721 .set_offline = tape_3590_offline,
1722 .set_online = tape_3590_online,
1723 };
1724
1725 /*
1726 * Setup discipline structure.
1727 */
1728 static int
1729 tape_3590_init(void)
1730 {
1731 int rc;
1732
1733 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));
1734 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
1735 #ifdef DBF_LIKE_HELL
1736 debug_set_level(TAPE_DBF_AREA, 6);
1737 #endif
1738
1739 DBF_EVENT(3, "3590 init\n");
1740 /* Register driver for 3590 tapes. */
1741 rc = ccw_driver_register(&tape_3590_driver);
1742 if (rc)
1743 DBF_EVENT(3, "3590 init failed\n");
1744 else
1745 DBF_EVENT(3, "3590 registered\n");
1746 return rc;
1747 }
1748
1749 static void
1750 tape_3590_exit(void)
1751 {
1752 ccw_driver_unregister(&tape_3590_driver);
1753
1754 debug_unregister(TAPE_DBF_AREA);
1755 }
1756
1757 MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
1758 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
1759 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
1760 MODULE_LICENSE("GPL");
1761
1762 module_init(tape_3590_init);
1763 module_exit(tape_3590_exit);
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