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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / s390 / char / tape_3590.c
blob9821c58866137710bfa2e52aaa5bd6a2045831ae
1 /*
2 * drivers/s390/char/tape_3590.c
3 * tape device discipline for 3590 tapes.
4 *
5 * Copyright IBM Corp. 2001, 2009
6 * Author(s): Stefan Bader <shbader@de.ibm.com>
7 * Michael Holzheu <holzheu@de.ibm.com>
8 * Martin Schwidefsky <schwidefsky@de.ibm.com>
9 */
10
11 #define KMSG_COMPONENT "tape_3590"
12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/bio.h>
17 #include <asm/ebcdic.h>
18
19 #define TAPE_DBF_AREA tape_3590_dbf
20 #define BUFSIZE 512 /* size of buffers for dynamic generated messages */
21
22 #include "tape.h"
23 #include "tape_std.h"
24 #include "tape_3590.h"
25
26 /*
27 * Pointer to debug area.
28 */
29 debug_info_t *TAPE_DBF_AREA = NULL;
30 EXPORT_SYMBOL(TAPE_DBF_AREA);
31
32 /*******************************************************************
33 * Error Recovery fuctions:
34 * - Read Opposite: implemented
35 * - Read Device (buffered) log: BRA
36 * - Read Library log: BRA
37 * - Swap Devices: BRA
38 * - Long Busy: implemented
39 * - Special Intercept: BRA
40 * - Read Alternate: implemented
41 *******************************************************************/
42
43 static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = {
44 [0x00] = "",
45 [0x10] = "Lost Sense",
46 [0x11] = "Assigned Elsewhere",
47 [0x12] = "Allegiance Reset",
48 [0x13] = "Shared Access Violation",
49 [0x20] = "Command Reject",
50 [0x21] = "Configuration Error",
51 [0x22] = "Protection Exception",
52 [0x23] = "Write Protect",
53 [0x24] = "Write Length",
54 [0x25] = "Read-Only Format",
55 [0x31] = "Beginning of Partition",
56 [0x33] = "End of Partition",
57 [0x34] = "End of Data",
58 [0x35] = "Block not found",
59 [0x40] = "Device Intervention",
60 [0x41] = "Loader Intervention",
61 [0x42] = "Library Intervention",
62 [0x50] = "Write Error",
63 [0x51] = "Erase Error",
64 [0x52] = "Formatting Error",
65 [0x53] = "Read Error",
66 [0x54] = "Unsupported Format",
67 [0x55] = "No Formatting",
68 [0x56] = "Positioning lost",
69 [0x57] = "Read Length",
70 [0x60] = "Unsupported Medium",
71 [0x61] = "Medium Length Error",
72 [0x62] = "Medium removed",
73 [0x64] = "Load Check",
74 [0x65] = "Unload Check",
75 [0x70] = "Equipment Check",
76 [0x71] = "Bus out Check",
77 [0x72] = "Protocol Error",
78 [0x73] = "Interface Error",
79 [0x74] = "Overrun",
80 [0x75] = "Halt Signal",
81 [0x90] = "Device fenced",
82 [0x91] = "Device Path fenced",
83 [0xa0] = "Volume misplaced",
84 [0xa1] = "Volume inaccessible",
85 [0xa2] = "Volume in input",
86 [0xa3] = "Volume ejected",
87 [0xa4] = "All categories reserved",
88 [0xa5] = "Duplicate Volume",
89 [0xa6] = "Library Manager Offline",
90 [0xa7] = "Library Output Station full",
91 [0xa8] = "Vision System non-operational",
92 [0xa9] = "Library Manager Equipment Check",
93 [0xaa] = "Library Equipment Check",
94 [0xab] = "All Library Cells full",
95 [0xac] = "No Cleaner Volumes in Library",
96 [0xad] = "I/O Station door open",
97 [0xae] = "Subsystem environmental alert",
98 };
99
100 static int crypt_supported(struct tape_device *device)
101 {
102 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device));
103 }
104
105 static int crypt_enabled(struct tape_device *device)
106 {
107 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device));
108 }
109
110 static void ext_to_int_kekl(struct tape390_kekl *in,
111 struct tape3592_kekl *out)
112 {
113 int i;
114
115 memset(out, 0, sizeof(*out));
116 if (in->type == TAPE390_KEKL_TYPE_HASH)
117 out->flags |= 0x40;
118 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH)
119 out->flags |= 0x80;
120 strncpy(out->label, in->label, 64);
121 for (i = strlen(in->label); i < sizeof(out->label); i++)
122 out->label[i] = ' ';
123 ASCEBC(out->label, sizeof(out->label));
124 }
125
126 static void int_to_ext_kekl(struct tape3592_kekl *in,
127 struct tape390_kekl *out)
128 {
129 memset(out, 0, sizeof(*out));
130 if(in->flags & 0x40)
131 out->type = TAPE390_KEKL_TYPE_HASH;
132 else
133 out->type = TAPE390_KEKL_TYPE_LABEL;
134 if(in->flags & 0x80)
135 out->type_on_tape = TAPE390_KEKL_TYPE_HASH;
136 else
137 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL;
138 memcpy(out->label, in->label, sizeof(in->label));
139 EBCASC(out->label, sizeof(in->label));
140 strim(out->label);
141 }
142
143 static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in,
144 struct tape390_kekl_pair *out)
145 {
146 if (in->count == 0) {
147 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE;
148 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE;
149 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;
150 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;
151 } else if (in->count == 1) {
152 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
153 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;
154 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;
155 } else if (in->count == 2) {
156 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
157 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]);
158 } else {
159 printk("Invalid KEKL number: %d\n", in->count);
160 BUG();
161 }
162 }
163
164 static int check_ext_kekl(struct tape390_kekl *kekl)
165 {
166 if (kekl->type == TAPE390_KEKL_TYPE_NONE)
167 goto invalid;
168 if (kekl->type > TAPE390_KEKL_TYPE_HASH)
169 goto invalid;
170 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE)
171 goto invalid;
172 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH)
173 goto invalid;
174 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) &&
175 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL))
176 goto invalid;
177
178 return 0;
179 invalid:
180 return -EINVAL;
181 }
182
183 static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls)
184 {
185 if (check_ext_kekl(&kekls->kekl[0]))
186 goto invalid;
187 if (check_ext_kekl(&kekls->kekl[1]))
188 goto invalid;
189
190 return 0;
191 invalid:
192 return -EINVAL;
193 }
194
195 /*
196 * Query KEKLs
197 */
198 static int tape_3592_kekl_query(struct tape_device *device,
199 struct tape390_kekl_pair *ext_kekls)
200 {
201 struct tape_request *request;
202 struct tape3592_kekl_query_order *order;
203 struct tape3592_kekl_query_data *int_kekls;
204 int rc;
205
206 DBF_EVENT(6, "tape3592_kekl_query\n");
207 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA);
208 if (!int_kekls)
209 return -ENOMEM;
210 request = tape_alloc_request(2, sizeof(*order));
211 if (IS_ERR(request)) {
212 rc = PTR_ERR(request);
213 goto fail_malloc;
214 }
215 order = request->cpdata;
216 memset(order,0,sizeof(*order));
217 order->code = 0xe2;
218 order->max_count = 2;
219 request->op = TO_KEKL_QUERY;
220 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
221 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls),
222 int_kekls);
223 rc = tape_do_io(device, request);
224 if (rc)
225 goto fail_request;
226 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls);
227
228 rc = 0;
229 fail_request:
230 tape_free_request(request);
231 fail_malloc:
232 kfree(int_kekls);
233 return rc;
234 }
235
236 /*
237 * IOCTL: Query KEKLs
238 */
239 static int tape_3592_ioctl_kekl_query(struct tape_device *device,
240 unsigned long arg)
241 {
242 int rc;
243 struct tape390_kekl_pair *ext_kekls;
244
245 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n");
246 if (!crypt_supported(device))
247 return -ENOSYS;
248 if (!crypt_enabled(device))
249 return -EUNATCH;
250 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL);
251 if (!ext_kekls)
252 return -ENOMEM;
253 rc = tape_3592_kekl_query(device, ext_kekls);
254 if (rc != 0)
255 goto fail;
256 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) {
257 rc = -EFAULT;
258 goto fail;
259 }
260 rc = 0;
261 fail:
262 kfree(ext_kekls);
263 return rc;
264 }
265
266 static int tape_3590_mttell(struct tape_device *device, int mt_count);
267
268 /*
269 * Set KEKLs
270 */
271 static int tape_3592_kekl_set(struct tape_device *device,
272 struct tape390_kekl_pair *ext_kekls)
273 {
274 struct tape_request *request;
275 struct tape3592_kekl_set_order *order;
276
277 DBF_EVENT(6, "tape3592_kekl_set\n");
278 if (check_ext_kekl_pair(ext_kekls)) {
279 DBF_EVENT(6, "invalid kekls\n");
280 return -EINVAL;
281 }
282 if (tape_3590_mttell(device, 0) != 0)
283 return -EBADSLT;
284 request = tape_alloc_request(1, sizeof(*order));
285 if (IS_ERR(request))
286 return PTR_ERR(request);
287 order = request->cpdata;
288 memset(order, 0, sizeof(*order));
289 order->code = 0xe3;
290 order->kekls.count = 2;
291 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]);
292 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]);
293 request->op = TO_KEKL_SET;
294 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
295
296 return tape_do_io_free(device, request);
297 }
298
299 /*
300 * IOCTL: Set KEKLs
301 */
302 static int tape_3592_ioctl_kekl_set(struct tape_device *device,
303 unsigned long arg)
304 {
305 int rc;
306 struct tape390_kekl_pair *ext_kekls;
307
308 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n");
309 if (!crypt_supported(device))
310 return -ENOSYS;
311 if (!crypt_enabled(device))
312 return -EUNATCH;
313 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL);
314 if (!ext_kekls)
315 return -ENOMEM;
316 if (copy_from_user(ext_kekls, (char __user *)arg, sizeof(*ext_kekls))) {
317 rc = -EFAULT;
318 goto out;
319 }
320 rc = tape_3592_kekl_set(device, ext_kekls);
321 out:
322 kfree(ext_kekls);
323 return rc;
324 }
325
326 /*
327 * Enable encryption
328 */
329 static int tape_3592_enable_crypt(struct tape_device *device)
330 {
331 struct tape_request *request;
332 char *data;
333
334 DBF_EVENT(6, "tape_3592_enable_crypt\n");
335 if (!crypt_supported(device))
336 return -ENOSYS;
337 request = tape_alloc_request(2, 72);
338 if (IS_ERR(request))
339 return PTR_ERR(request);
340 data = request->cpdata;
341 memset(data,0,72);
342
343 data[0] = 0x05;
344 data[36 + 0] = 0x03;
345 data[36 + 1] = 0x03;
346 data[36 + 4] = 0x40;
347 data[36 + 6] = 0x01;
348 data[36 + 14] = 0x2f;
349 data[36 + 18] = 0xc3;
350 data[36 + 35] = 0x72;
351 request->op = TO_CRYPT_ON;
352 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
353 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
354 return tape_do_io_free(device, request);
355 }
356
357 /*
358 * Disable encryption
359 */
360 static int tape_3592_disable_crypt(struct tape_device *device)
361 {
362 struct tape_request *request;
363 char *data;
364
365 DBF_EVENT(6, "tape_3592_disable_crypt\n");
366 if (!crypt_supported(device))
367 return -ENOSYS;
368 request = tape_alloc_request(2, 72);
369 if (IS_ERR(request))
370 return PTR_ERR(request);
371 data = request->cpdata;
372 memset(data,0,72);
373
374 data[0] = 0x05;
375 data[36 + 0] = 0x03;
376 data[36 + 1] = 0x03;
377 data[36 + 35] = 0x32;
378
379 request->op = TO_CRYPT_OFF;
380 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
381 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
382
383 return tape_do_io_free(device, request);
384 }
385
386 /*
387 * IOCTL: Set encryption status
388 */
389 static int tape_3592_ioctl_crypt_set(struct tape_device *device,
390 unsigned long arg)
391 {
392 struct tape390_crypt_info info;
393
394 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n");
395 if (!crypt_supported(device))
396 return -ENOSYS;
397 if (copy_from_user(&info, (char __user *)arg, sizeof(info)))
398 return -EFAULT;
399 if (info.status & ~TAPE390_CRYPT_ON_MASK)
400 return -EINVAL;
401 if (info.status & TAPE390_CRYPT_ON_MASK)
402 return tape_3592_enable_crypt(device);
403 else
404 return tape_3592_disable_crypt(device);
405 }
406
407 static int tape_3590_sense_medium(struct tape_device *device);
408
409 /*
410 * IOCTL: Query enryption status
411 */
412 static int tape_3592_ioctl_crypt_query(struct tape_device *device,
413 unsigned long arg)
414 {
415 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n");
416 if (!crypt_supported(device))
417 return -ENOSYS;
418 tape_3590_sense_medium(device);
419 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device),
420 sizeof(TAPE_3590_CRYPT_INFO(device))))
421 return -EFAULT;
422 else
423 return 0;
424 }
425
426 /*
427 * 3590 IOCTL Overload
428 */
429 static int
430 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)
431 {
432 switch (cmd) {
433 case TAPE390_DISPLAY: {
434 struct display_struct disp;
435
436 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)))
437 return -EFAULT;
438
439 return tape_std_display(device, &disp);
440 }
441 case TAPE390_KEKL_SET:
442 return tape_3592_ioctl_kekl_set(device, arg);
443 case TAPE390_KEKL_QUERY:
444 return tape_3592_ioctl_kekl_query(device, arg);
445 case TAPE390_CRYPT_SET:
446 return tape_3592_ioctl_crypt_set(device, arg);
447 case TAPE390_CRYPT_QUERY:
448 return tape_3592_ioctl_crypt_query(device, arg);
449 default:
450 return -EINVAL; /* no additional ioctls */
451 }
452 }
453
454 /*
455 * SENSE Medium: Get Sense data about medium state
456 */
457 static int
458 tape_3590_sense_medium(struct tape_device *device)
459 {
460 struct tape_request *request;
461
462 request = tape_alloc_request(1, 128);
463 if (IS_ERR(request))
464 return PTR_ERR(request);
465 request->op = TO_MSEN;
466 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
467 return tape_do_io_free(device, request);
468 }
469
470 /*
471 * MTTELL: Tell block. Return the number of block relative to current file.
472 */
473 static int
474 tape_3590_mttell(struct tape_device *device, int mt_count)
475 {
476 __u64 block_id;
477 int rc;
478
479 rc = tape_std_read_block_id(device, &block_id);
480 if (rc)
481 return rc;
482 return block_id >> 32;
483 }
484
485 /*
486 * MTSEEK: seek to the specified block.
487 */
488 static int
489 tape_3590_mtseek(struct tape_device *device, int count)
490 {
491 struct tape_request *request;
492
493 DBF_EVENT(6, "xsee id: %x\n", count);
494 request = tape_alloc_request(3, 4);
495 if (IS_ERR(request))
496 return PTR_ERR(request);
497 request->op = TO_LBL;
498 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
499 *(__u32 *) request->cpdata = count;
500 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
501 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
502 return tape_do_io_free(device, request);
503 }
504
505 /*
506 * Read Opposite Error Recovery Function:
507 * Used, when Read Forward does not work
508 */
509 static void
510 tape_3590_read_opposite(struct tape_device *device,
511 struct tape_request *request)
512 {
513 struct tape_3590_disc_data *data;
514
515 /*
516 * We have allocated 4 ccws in tape_std_read, so we can now
517 * transform the request to a read backward, followed by a
518 * forward space block.
519 */
520 request->op = TO_RBA;
521 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
522 data = device->discdata;
523 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,
524 device->char_data.idal_buf);
525 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
526 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
527 DBF_EVENT(6, "xrop ccwg\n");
528 }
529
530 /*
531 * Read Attention Msg
532 * This should be done after an interrupt with attention bit (0x80)
533 * in device state.
534 *
535 * After a "read attention message" request there are two possible
536 * results:
537 *
538 * 1. A unit check is presented, when attention sense is present (e.g. when
539 * a medium has been unloaded). The attention sense comes then
540 * together with the unit check. The recovery action is either "retry"
541 * (in case there is an attention message pending) or "permanent error".
542 *
543 * 2. The attention msg is written to the "read subsystem data" buffer.
544 * In this case we probably should print it to the console.
545 */
546 static int
547 tape_3590_read_attmsg(struct tape_device *device)
548 {
549 struct tape_request *request;
550 char *buf;
551
552 request = tape_alloc_request(3, 4096);
553 if (IS_ERR(request))
554 return PTR_ERR(request);
555 request->op = TO_READ_ATTMSG;
556 buf = request->cpdata;
557 buf[0] = PREP_RD_SS_DATA;
558 buf[6] = RD_ATTMSG; /* read att msg */
559 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf);
560 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12);
561 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
562 return tape_do_io_free(device, request);
563 }
564
565 /*
566 * These functions are used to schedule follow-up actions from within an
567 * interrupt context (like unsolicited interrupts).
568 */
569 struct work_handler_data {
570 struct tape_device *device;
571 enum tape_op op;
572 struct work_struct work;
573 };
574
575 static void
576 tape_3590_work_handler(struct work_struct *work)
577 {
578 struct work_handler_data *p =
579 container_of(work, struct work_handler_data, work);
580
581 switch (p->op) {
582 case TO_MSEN:
583 tape_3590_sense_medium(p->device);
584 break;
585 case TO_READ_ATTMSG:
586 tape_3590_read_attmsg(p->device);
587 break;
588 case TO_CRYPT_ON:
589 tape_3592_enable_crypt(p->device);
590 break;
591 case TO_CRYPT_OFF:
592 tape_3592_disable_crypt(p->device);
593 break;
594 default:
595 DBF_EVENT(3, "T3590: work handler undefined for "
596 "operation 0x%02x\n", p->op);
597 }
598 tape_put_device(p->device);
599 kfree(p);
600 }
601
602 static int
603 tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
604 {
605 struct work_handler_data *p;
606
607 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
608 return -ENOMEM;
609
610 INIT_WORK(&p->work, tape_3590_work_handler);
611
612 p->device = tape_get_device(device);
613 p->op = op;
614
615 schedule_work(&p->work);
616 return 0;
617 }
618
619 #ifdef CONFIG_S390_TAPE_BLOCK
620 /*
621 * Tape Block READ
622 */
623 static struct tape_request *
624 tape_3590_bread(struct tape_device *device, struct request *req)
625 {
626 struct tape_request *request;
627 struct ccw1 *ccw;
628 int count = 0, start_block;
629 unsigned off;
630 char *dst;
631 struct bio_vec *bv;
632 struct req_iterator iter;
633
634 DBF_EVENT(6, "xBREDid:");
635 start_block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B;
636 DBF_EVENT(6, "start_block = %i\n", start_block);
637
638 rq_for_each_segment(bv, req, iter)
639 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
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_segment(bv, req, iter) {
657 dst = page_address(bv->bv_page) + bv->bv_offset;
658 for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) {
659 ccw->flags = CCW_FLAG_CC;
660 ccw->cmd_code = READ_FORWARD;
661 ccw->count = TAPEBLOCK_HSEC_SIZE;
662 set_normalized_cda(ccw, (void *) __pa(dst));
663 ccw++;
664 dst += TAPEBLOCK_HSEC_SIZE;
665 }
666 BUG_ON(off > bv->bv_len);
667 }
668 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
669 DBF_EVENT(6, "xBREDccwg\n");
670 return request;
671 }
672
673 static void
674 tape_3590_free_bread(struct tape_request *request)
675 {
676 struct ccw1 *ccw;
677
678 /* Last ccw is a nop and doesn't need clear_normalized_cda */
679 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++)
680 if (ccw->cmd_code == READ_FORWARD)
681 clear_normalized_cda(ccw);
682 tape_free_request(request);
683 }
684
685 /*
686 * check_locate is called just before the tape request is passed to
687 * the common io layer for execution. It has to check the current
688 * tape position and insert a locate ccw if it doesn't match the
689 * start block for the request.
690 */
691 static void
692 tape_3590_check_locate(struct tape_device *device, struct tape_request *request)
693 {
694 __u32 *start_block;
695
696 start_block = (__u32 *) request->cpdata;
697 if (*start_block != device->blk_data.block_position) {
698 /* Add the start offset of the file to get the real block. */
699 *start_block += device->bof;
700 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
701 }
702 }
703 #endif
704
705 static void tape_3590_med_state_set(struct tape_device *device,
706 struct tape_3590_med_sense *sense)
707 {
708 struct tape390_crypt_info *c_info;
709
710 c_info = &TAPE_3590_CRYPT_INFO(device);
711
712 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst);
713 switch (sense->macst) {
714 case 0x04:
715 case 0x05:
716 case 0x06:
717 tape_med_state_set(device, MS_UNLOADED);
718 TAPE_3590_CRYPT_INFO(device).medium_status = 0;
719 return;
720 case 0x08:
721 case 0x09:
722 tape_med_state_set(device, MS_LOADED);
723 break;
724 default:
725 tape_med_state_set(device, MS_UNKNOWN);
726 return;
727 }
728 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK;
729 if (sense->flags & MSENSE_CRYPT_MASK) {
730 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags);
731 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK;
732 } else {
733 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags);
734 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK;
735 }
736 }
737
738 /*
739 * The done handler is called at device/channel end and wakes up the sleeping
740 * process
741 */
742 static int
743 tape_3590_done(struct tape_device *device, struct tape_request *request)
744 {
745 struct tape_3590_disc_data *disc_data;
746
747 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
748 disc_data = device->discdata;
749
750 switch (request->op) {
751 case TO_BSB:
752 case TO_BSF:
753 case TO_DSE:
754 case TO_FSB:
755 case TO_FSF:
756 case TO_LBL:
757 case TO_RFO:
758 case TO_RBA:
759 case TO_REW:
760 case TO_WRI:
761 case TO_WTM:
762 case TO_BLOCK:
763 case TO_LOAD:
764 tape_med_state_set(device, MS_LOADED);
765 break;
766 case TO_RUN:
767 tape_med_state_set(device, MS_UNLOADED);
768 tape_3590_schedule_work(device, TO_CRYPT_OFF);
769 break;
770 case TO_MSEN:
771 tape_3590_med_state_set(device, request->cpdata);
772 break;
773 case TO_CRYPT_ON:
774 TAPE_3590_CRYPT_INFO(device).status
775 |= TAPE390_CRYPT_ON_MASK;
776 *(device->modeset_byte) |= 0x03;
777 break;
778 case TO_CRYPT_OFF:
779 TAPE_3590_CRYPT_INFO(device).status
780 &= ~TAPE390_CRYPT_ON_MASK;
781 *(device->modeset_byte) &= ~0x03;
782 break;
783 case TO_RBI: /* RBI seems to succeed even without medium loaded. */
784 case TO_NOP: /* Same to NOP. */
785 case TO_READ_CONFIG:
786 case TO_READ_ATTMSG:
787 case TO_DIS:
788 case TO_ASSIGN:
789 case TO_UNASSIGN:
790 case TO_SIZE:
791 case TO_KEKL_SET:
792 case TO_KEKL_QUERY:
793 case TO_RDC:
794 break;
795 }
796 return TAPE_IO_SUCCESS;
797 }
798
799 /*
800 * This fuction is called, when error recovery was successfull
801 */
802 static inline int
803 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
804 {
805 DBF_EVENT(3, "Error Recovery successful for %s\n",
806 tape_op_verbose[request->op]);
807 return tape_3590_done(device, request);
808 }
809
810 /*
811 * This fuction is called, when error recovery was not successfull
812 */
813 static inline int
814 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
815 struct irb *irb, int rc)
816 {
817 DBF_EVENT(3, "Error Recovery failed for %s\n",
818 tape_op_verbose[request->op]);
819 tape_dump_sense_dbf(device, request, irb);
820 return rc;
821 }
822
823 /*
824 * Error Recovery do retry
825 */
826 static inline int
827 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
828 struct irb *irb)
829 {
830 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
831 tape_dump_sense_dbf(device, request, irb);
832 return TAPE_IO_RETRY;
833 }
834
835 /*
836 * Handle unsolicited interrupts
837 */
838 static int
839 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
840 {
841 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END)
842 /* Probably result of halt ssch */
843 return TAPE_IO_PENDING;
844 else if (irb->scsw.cmd.dstat == 0x85)
845 /* Device Ready */
846 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id);
847 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
848 tape_3590_schedule_work(device, TO_READ_ATTMSG);
849 } else {
850 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
851 tape_dump_sense_dbf(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 BUG();
880 return TAPE_IO_STOP;
881 }
882 }
883
884 /*
885 * RDL: Read Device (buffered) log
886 */
887 static int
888 tape_3590_erp_read_buf_log(struct tape_device *device,
889 struct tape_request *request, struct irb *irb)
890 {
891 /*
892 * We just do the basic error recovery at the moment (retry).
893 * Perhaps in the future, we read the log and dump it somewhere...
894 */
895 return tape_3590_erp_basic(device, request, irb, -EIO);
896 }
897
898 /*
899 * SWAP: Swap Devices
900 */
901 static int
902 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
903 struct irb *irb)
904 {
905 /*
906 * This error recovery should swap the tapes
907 * if the original has a problem. The operation
908 * should proceed with the new tape... this
909 * should probably be done in user space!
910 */
911 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a "
912 "different tape unit\n");
913 return tape_3590_erp_basic(device, request, irb, -EIO);
914 }
915
916 /*
917 * LBY: Long Busy
918 */
919 static int
920 tape_3590_erp_long_busy(struct tape_device *device,
921 struct tape_request *request, struct irb *irb)
922 {
923 DBF_EVENT(6, "Device is busy\n");
924 return TAPE_IO_LONG_BUSY;
925 }
926
927 /*
928 * SPI: Special Intercept
929 */
930 static int
931 tape_3590_erp_special_interrupt(struct tape_device *device,
932 struct tape_request *request, struct irb *irb)
933 {
934 return tape_3590_erp_basic(device, request, irb, -EIO);
935 }
936
937 /*
938 * RDA: Read Alternate
939 */
940 static int
941 tape_3590_erp_read_alternate(struct tape_device *device,
942 struct tape_request *request, struct irb *irb)
943 {
944 struct tape_3590_disc_data *data;
945
946 /*
947 * The issued Read Backward or Read Previous command is not
948 * supported by the device
949 * The recovery action should be to issue another command:
950 * Read Revious: if Read Backward is not supported
951 * Read Backward: if Read Previous is not supported
952 */
953 data = device->discdata;
954 if (data->read_back_op == READ_PREVIOUS) {
955 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
956 device->cdev_id);
957 data->read_back_op = READ_BACKWARD;
958 } else {
959 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
960 device->cdev_id);
961 data->read_back_op = READ_PREVIOUS;
962 }
963 tape_3590_read_opposite(device, request);
964 return tape_3590_erp_retry(device, request, irb);
965 }
966
967 /*
968 * Error Recovery read opposite
969 */
970 static int
971 tape_3590_erp_read_opposite(struct tape_device *device,
972 struct tape_request *request, struct irb *irb)
973 {
974 switch (request->op) {
975 case TO_RFO:
976 /*
977 * We did read forward, but the data could not be read.
978 * We will read backward and then skip forward again.
979 */
980 tape_3590_read_opposite(device, request);
981 return tape_3590_erp_retry(device, request, irb);
982 case TO_RBA:
983 /* We tried to read forward and backward, but hat no success */
984 return tape_3590_erp_failed(device, request, irb, -EIO);
985 break;
986 default:
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 char *exception, *service;
999
1000 exception = kmalloc(BUFSIZE, GFP_ATOMIC);
1001 service = kmalloc(BUFSIZE, GFP_ATOMIC);
1002
1003 if (!exception || !service)
1004 goto out_nomem;
1005
1006 sense = (struct tape_3590_sense *) irb->ecw;
1007 /* Exception Message */
1008 switch (sense->fmt.f70.emc) {
1009 case 0x02:
1010 snprintf(exception, BUFSIZE, "Data degraded");
1011 break;
1012 case 0x03:
1013 snprintf(exception, BUFSIZE, "Data degraded in partion %i",
1014 sense->fmt.f70.mp);
1015 break;
1016 case 0x04:
1017 snprintf(exception, BUFSIZE, "Medium degraded");
1018 break;
1019 case 0x05:
1020 snprintf(exception, BUFSIZE, "Medium degraded in partition %i",
1021 sense->fmt.f70.mp);
1022 break;
1023 case 0x06:
1024 snprintf(exception, BUFSIZE, "Block 0 Error");
1025 break;
1026 case 0x07:
1027 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x",
1028 sense->fmt.f70.md);
1029 break;
1030 default:
1031 snprintf(exception, BUFSIZE, "0x%02x",
1032 sense->fmt.f70.emc);
1033 break;
1034 }
1035 /* Service Message */
1036 switch (sense->fmt.f70.smc) {
1037 case 0x02:
1038 snprintf(service, BUFSIZE, "Reference Media maintenance "
1039 "procedure %i", sense->fmt.f70.md);
1040 break;
1041 default:
1042 snprintf(service, BUFSIZE, "0x%02x",
1043 sense->fmt.f70.smc);
1044 break;
1045 }
1046
1047 dev_warn (&device->cdev->dev, "Tape media information: exception %s, "
1048 "service %s\n", exception, service);
1049
1050 out_nomem:
1051 kfree(exception);
1052 kfree(service);
1053 }
1054
1055 /*
1056 * Print an I/O Subsystem Service Information Message (message code f1)
1057 */
1058 static void
1059 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
1060 {
1061 struct tape_3590_sense *sense;
1062 char *exception, *service;
1063
1064 exception = kmalloc(BUFSIZE, GFP_ATOMIC);
1065 service = kmalloc(BUFSIZE, GFP_ATOMIC);
1066
1067 if (!exception || !service)
1068 goto out_nomem;
1069
1070 sense = (struct tape_3590_sense *) irb->ecw;
1071 /* Exception Message */
1072 switch (sense->fmt.f71.emc) {
1073 case 0x01:
1074 snprintf(exception, BUFSIZE, "Effect of failure is unknown");
1075 break;
1076 case 0x02:
1077 snprintf(exception, BUFSIZE, "CU Exception - no performance "
1078 "impact");
1079 break;
1080 case 0x03:
1081 snprintf(exception, BUFSIZE, "CU Exception on channel "
1082 "interface 0x%02x", sense->fmt.f71.md[0]);
1083 break;
1084 case 0x04:
1085 snprintf(exception, BUFSIZE, "CU Exception on device path "
1086 "0x%02x", sense->fmt.f71.md[0]);
1087 break;
1088 case 0x05:
1089 snprintf(exception, BUFSIZE, "CU Exception on library path "
1090 "0x%02x", sense->fmt.f71.md[0]);
1091 break;
1092 case 0x06:
1093 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x",
1094 sense->fmt.f71.md[0]);
1095 break;
1096 case 0x07:
1097 snprintf(exception, BUFSIZE, "CU Exception on partition "
1098 "0x%02x", sense->fmt.f71.md[0]);
1099 break;
1100 default:
1101 snprintf(exception, BUFSIZE, "0x%02x",
1102 sense->fmt.f71.emc);
1103 }
1104 /* Service Message */
1105 switch (sense->fmt.f71.smc) {
1106 case 0x01:
1107 snprintf(service, BUFSIZE, "Repair impact is unknown");
1108 break;
1109 case 0x02:
1110 snprintf(service, BUFSIZE, "Repair will not impact cu "
1111 "performance");
1112 break;
1113 case 0x03:
1114 if (sense->fmt.f71.mdf == 0)
1115 snprintf(service, BUFSIZE, "Repair will disable node "
1116 "0x%x on CU", sense->fmt.f71.md[1]);
1117 else
1118 snprintf(service, BUFSIZE, "Repair will disable "
1119 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1],
1120 sense->fmt.f71.md[2]);
1121 break;
1122 case 0x04:
1123 if (sense->fmt.f71.mdf == 0)
1124 snprintf(service, BUFSIZE, "Repair will disable "
1125 "channel path 0x%x on CU",
1126 sense->fmt.f71.md[1]);
1127 else
1128 snprintf(service, BUFSIZE, "Repair will disable cannel"
1129 " paths (0x%x-0x%x) on CU",
1130 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1131 break;
1132 case 0x05:
1133 if (sense->fmt.f71.mdf == 0)
1134 snprintf(service, BUFSIZE, "Repair will disable device"
1135 " path 0x%x on CU", sense->fmt.f71.md[1]);
1136 else
1137 snprintf(service, BUFSIZE, "Repair will disable device"
1138 " paths (0x%x-0x%x) on CU",
1139 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1140 break;
1141 case 0x06:
1142 if (sense->fmt.f71.mdf == 0)
1143 snprintf(service, BUFSIZE, "Repair will disable "
1144 "library path 0x%x on CU",
1145 sense->fmt.f71.md[1]);
1146 else
1147 snprintf(service, BUFSIZE, "Repair will disable "
1148 "library paths (0x%x-0x%x) on CU",
1149 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1150 break;
1151 case 0x07:
1152 snprintf(service, BUFSIZE, "Repair will disable access to CU");
1153 break;
1154 default:
1155 snprintf(service, BUFSIZE, "0x%02x",
1156 sense->fmt.f71.smc);
1157 }
1158
1159 dev_warn (&device->cdev->dev, "I/O subsystem information: exception"
1160 " %s, service %s\n", exception, service);
1161 out_nomem:
1162 kfree(exception);
1163 kfree(service);
1164 }
1165
1166 /*
1167 * Print an Device Subsystem Service Information Message (message code f2)
1168 */
1169 static void
1170 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
1171 {
1172 struct tape_3590_sense *sense;
1173 char *exception, *service;
1174
1175 exception = kmalloc(BUFSIZE, GFP_ATOMIC);
1176 service = kmalloc(BUFSIZE, GFP_ATOMIC);
1177
1178 if (!exception || !service)
1179 goto out_nomem;
1180
1181 sense = (struct tape_3590_sense *) irb->ecw;
1182 /* Exception Message */
1183 switch (sense->fmt.f71.emc) {
1184 case 0x01:
1185 snprintf(exception, BUFSIZE, "Effect of failure is unknown");
1186 break;
1187 case 0x02:
1188 snprintf(exception, BUFSIZE, "DV Exception - no performance"
1189 " impact");
1190 break;
1191 case 0x03:
1192 snprintf(exception, BUFSIZE, "DV Exception on channel "
1193 "interface 0x%02x", sense->fmt.f71.md[0]);
1194 break;
1195 case 0x04:
1196 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x",
1197 sense->fmt.f71.md[0]);
1198 break;
1199 case 0x05:
1200 snprintf(exception, BUFSIZE, "DV Exception on message display"
1201 " 0x%02x", sense->fmt.f71.md[0]);
1202 break;
1203 case 0x06:
1204 snprintf(exception, BUFSIZE, "DV Exception in tape path");
1205 break;
1206 case 0x07:
1207 snprintf(exception, BUFSIZE, "DV Exception in drive");
1208 break;
1209 default:
1210 snprintf(exception, BUFSIZE, "0x%02x",
1211 sense->fmt.f71.emc);
1212 }
1213 /* Service Message */
1214 switch (sense->fmt.f71.smc) {
1215 case 0x01:
1216 snprintf(service, BUFSIZE, "Repair impact is unknown");
1217 break;
1218 case 0x02:
1219 snprintf(service, BUFSIZE, "Repair will not impact device "
1220 "performance");
1221 break;
1222 case 0x03:
1223 if (sense->fmt.f71.mdf == 0)
1224 snprintf(service, BUFSIZE, "Repair will disable "
1225 "channel path 0x%x on DV",
1226 sense->fmt.f71.md[1]);
1227 else
1228 snprintf(service, BUFSIZE, "Repair will disable "
1229 "channel path (0x%x-0x%x) on DV",
1230 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1231 break;
1232 case 0x04:
1233 if (sense->fmt.f71.mdf == 0)
1234 snprintf(service, BUFSIZE, "Repair will disable "
1235 "interface 0x%x on DV", sense->fmt.f71.md[1]);
1236 else
1237 snprintf(service, BUFSIZE, "Repair will disable "
1238 "interfaces (0x%x-0x%x) on DV",
1239 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1240 break;
1241 case 0x05:
1242 if (sense->fmt.f71.mdf == 0)
1243 snprintf(service, BUFSIZE, "Repair will disable loader"
1244 " 0x%x on DV", sense->fmt.f71.md[1]);
1245 else
1246 snprintf(service, BUFSIZE, "Repair will disable loader"
1247 " (0x%x-0x%x) on DV",
1248 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1249 break;
1250 case 0x07:
1251 snprintf(service, BUFSIZE, "Repair will disable access to DV");
1252 break;
1253 case 0x08:
1254 if (sense->fmt.f71.mdf == 0)
1255 snprintf(service, BUFSIZE, "Repair will disable "
1256 "message display 0x%x on DV",
1257 sense->fmt.f71.md[1]);
1258 else
1259 snprintf(service, BUFSIZE, "Repair will disable "
1260 "message displays (0x%x-0x%x) on DV",
1261 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1262 break;
1263 case 0x09:
1264 snprintf(service, BUFSIZE, "Clean DV");
1265 break;
1266 default:
1267 snprintf(service, BUFSIZE, "0x%02x",
1268 sense->fmt.f71.smc);
1269 }
1270
1271 dev_warn (&device->cdev->dev, "Device subsystem information: exception"
1272 " %s, service %s\n", exception, service);
1273 out_nomem:
1274 kfree(exception);
1275 kfree(service);
1276 }
1277
1278 /*
1279 * Print standard ERA Message
1280 */
1281 static void
1282 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
1283 {
1284 struct tape_3590_sense *sense;
1285
1286 sense = (struct tape_3590_sense *) irb->ecw;
1287 if (sense->mc == 0)
1288 return;
1289 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
1290 if (tape_3590_msg[sense->mc] != NULL)
1291 dev_warn (&device->cdev->dev, "The tape unit has "
1292 "issued sense message %s\n",
1293 tape_3590_msg[sense->mc]);
1294 else
1295 dev_warn (&device->cdev->dev, "The tape unit has "
1296 "issued an unknown sense message code 0x%x\n",
1297 sense->mc);
1298 return;
1299 }
1300 if (sense->mc == 0xf0) {
1301 /* Standard Media Information Message */
1302 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, "
1303 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc,
1304 sense->fmt.f70.emc, sense->fmt.f70.smc,
1305 sense->fmt.f70.refcode, sense->fmt.f70.mid,
1306 sense->fmt.f70.fid);
1307 tape_3590_print_mim_msg_f0(device, irb);
1308 return;
1309 }
1310 if (sense->mc == 0xf1) {
1311 /* Standard I/O Subsystem Service Information Message */
1312 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x,"
1313 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
1314 sense->fmt.f71.sev, device->cdev->id.dev_model,
1315 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc,
1316 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2,
1317 sense->fmt.f71.refcode3);
1318 tape_3590_print_io_sim_msg_f1(device, irb);
1319 return;
1320 }
1321 if (sense->mc == 0xf2) {
1322 /* Standard Device Service Information Message */
1323 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x"
1324 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
1325 sense->fmt.f71.sev, device->cdev->id.dev_model,
1326 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc,
1327 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2,
1328 sense->fmt.f71.refcode3);
1329 tape_3590_print_dev_sim_msg_f2(device, irb);
1330 return;
1331 }
1332 if (sense->mc == 0xf3) {
1333 /* Standard Library Service Information Message */
1334 return;
1335 }
1336 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown "
1337 "sense message code %x\n", sense->mc);
1338 }
1339
1340 static int tape_3590_crypt_error(struct tape_device *device,
1341 struct tape_request *request, struct irb *irb)
1342 {
1343 u8 cu_rc, ekm_rc1;
1344 u16 ekm_rc2;
1345 u32 drv_rc;
1346 const char *bus_id;
1347 char *sense;
1348
1349 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data;
1350 bus_id = dev_name(&device->cdev->dev);
1351 cu_rc = sense[0];
1352 drv_rc = *((u32*) &sense[5]) & 0xffffff;
1353 ekm_rc1 = sense[9];
1354 ekm_rc2 = *((u16*) &sense[10]);
1355 if ((cu_rc == 0) && (ekm_rc2 == 0xee31))
1356 /* key not defined on EKM */
1357 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED);
1358 if ((cu_rc == 1) || (cu_rc == 2))
1359 /* No connection to EKM */
1360 return tape_3590_erp_basic(device, request, irb, -ENOTCONN);
1361
1362 dev_err (&device->cdev->dev, "The tape unit failed to obtain the "
1363 "encryption key from EKM\n");
1364
1365 return tape_3590_erp_basic(device, request, irb, -ENOKEY);
1366 }
1367
1368 /*
1369 * 3590 error Recovery routine:
1370 * If possible, it tries to recover from the error. If this is not possible,
1371 * inform the user about the problem.
1372 */
1373 static int
1374 tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
1375 struct irb *irb)
1376 {
1377 struct tape_3590_sense *sense;
1378 int rc;
1379
1380 #ifdef CONFIG_S390_TAPE_BLOCK
1381 if (request->op == TO_BLOCK) {
1382 /*
1383 * Recovery for block device requests. Set the block_position
1384 * to something invalid and retry.
1385 */
1386 device->blk_data.block_position = -1;
1387 if (request->retries-- <= 0)
1388 return tape_3590_erp_failed(device, request, irb, -EIO);
1389 else
1390 return tape_3590_erp_retry(device, request, irb);
1391 }
1392 #endif
1393
1394 sense = (struct tape_3590_sense *) irb->ecw;
1395
1396 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc);
1397
1398 /*
1399 * First check all RC-QRCs where we want to do something special
1400 * - "break": basic error recovery is done
1401 * - "goto out:": just print error message if available
1402 */
1403 rc = -EIO;
1404 switch (sense->rc_rqc) {
1405
1406 case 0x1110:
1407 tape_3590_print_era_msg(device, irb);
1408 return tape_3590_erp_read_buf_log(device, request, irb);
1409
1410 case 0x2011:
1411 tape_3590_print_era_msg(device, irb);
1412 return tape_3590_erp_read_alternate(device, request, irb);
1413
1414 case 0x2230:
1415 case 0x2231:
1416 tape_3590_print_era_msg(device, irb);
1417 return tape_3590_erp_special_interrupt(device, request, irb);
1418 case 0x2240:
1419 return tape_3590_crypt_error(device, request, irb);
1420
1421 case 0x3010:
1422 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
1423 device->cdev_id);
1424 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1425 case 0x3012:
1426 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
1427 device->cdev_id);
1428 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1429 case 0x3020:
1430 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
1431 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1432
1433 case 0x3122:
1434 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
1435 device->cdev_id);
1436 return tape_3590_erp_basic(device, request, irb, -EIO);
1437 case 0x3123:
1438 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
1439 device->cdev_id);
1440 tape_med_state_set(device, MS_UNLOADED);
1441 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1442 return tape_3590_erp_basic(device, request, irb, 0);
1443
1444 case 0x4010:
1445 /*
1446 * print additional msg since default msg
1447 * "device intervention" is not very meaningfull
1448 */
1449 tape_med_state_set(device, MS_UNLOADED);
1450 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1451 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1452 case 0x4012: /* Device Long Busy */
1453 /* XXX: Also use long busy handling here? */
1454 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id);
1455 tape_3590_print_era_msg(device, irb);
1456 return tape_3590_erp_basic(device, request, irb, -EBUSY);
1457 case 0x4014:
1458 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id);
1459 return tape_3590_erp_long_busy(device, request, irb);
1460
1461 case 0x5010:
1462 if (sense->rac == 0xd0) {
1463 /* Swap */
1464 tape_3590_print_era_msg(device, irb);
1465 return tape_3590_erp_swap(device, request, irb);
1466 }
1467 if (sense->rac == 0x26) {
1468 /* Read Opposite */
1469 tape_3590_print_era_msg(device, irb);
1470 return tape_3590_erp_read_opposite(device, request,
1471 irb);
1472 }
1473 return tape_3590_erp_basic(device, request, irb, -EIO);
1474 case 0x5020:
1475 case 0x5021:
1476 case 0x5022:
1477 case 0x5040:
1478 case 0x5041:
1479 case 0x5042:
1480 tape_3590_print_era_msg(device, irb);
1481 return tape_3590_erp_swap(device, request, irb);
1482
1483 case 0x5110:
1484 case 0x5111:
1485 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1486
1487 case 0x5120:
1488 case 0x1120:
1489 tape_med_state_set(device, MS_UNLOADED);
1490 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1491 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1492
1493 case 0x6020:
1494 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1495
1496 case 0x8011:
1497 return tape_3590_erp_basic(device, request, irb, -EPERM);
1498 case 0x8013:
1499 dev_warn (&device->cdev->dev, "A different host has privileged"
1500 " access to the tape unit\n");
1501 return tape_3590_erp_basic(device, request, irb, -EPERM);
1502 default:
1503 return tape_3590_erp_basic(device, request, irb, -EIO);
1504 }
1505 }
1506
1507 /*
1508 * 3590 interrupt handler:
1509 */
1510 static int
1511 tape_3590_irq(struct tape_device *device, struct tape_request *request,
1512 struct irb *irb)
1513 {
1514 if (request == NULL)
1515 return tape_3590_unsolicited_irq(device, irb);
1516
1517 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) &&
1518 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) &&
1519 (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.cmd.dstat & DEV_STAT_UNIT_CHECK)
1526 return tape_3590_unit_check(device, request, irb);
1527
1528 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
1529 if (irb->scsw.cmd.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.cmd.dstat & DEV_STAT_CHN_END) {
1540 DBF_EVENT(2, "cannel end\n");
1541 return TAPE_IO_PENDING;
1542 }
1543
1544 if (irb->scsw.cmd.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 tape_dump_sense_dbf(device, request, irb);
1551 return TAPE_IO_STOP;
1552 }
1553
1554
1555 static int tape_3590_read_dev_chars(struct tape_device *device,
1556 struct tape_3590_rdc_data *rdc_data)
1557 {
1558 int rc;
1559 struct tape_request *request;
1560
1561 request = tape_alloc_request(1, sizeof(*rdc_data));
1562 if (IS_ERR(request))
1563 return PTR_ERR(request);
1564 request->op = TO_RDC;
1565 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data),
1566 request->cpdata);
1567 rc = tape_do_io(device, request);
1568 if (rc == 0)
1569 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data));
1570 tape_free_request(request);
1571 return rc;
1572 }
1573
1574 /*
1575 * Setup device function
1576 */
1577 static int
1578 tape_3590_setup_device(struct tape_device *device)
1579 {
1580 int rc;
1581 struct tape_3590_disc_data *data;
1582 struct tape_3590_rdc_data *rdc_data;
1583
1584 DBF_EVENT(6, "3590 device setup\n");
1585 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA);
1586 if (data == NULL)
1587 return -ENOMEM;
1588 data->read_back_op = READ_PREVIOUS;
1589 device->discdata = data;
1590
1591 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA);
1592 if (!rdc_data) {
1593 rc = -ENOMEM;
1594 goto fail_kmalloc;
1595 }
1596 rc = tape_3590_read_dev_chars(device, rdc_data);
1597 if (rc) {
1598 DBF_LH(3, "Read device characteristics failed!\n");
1599 goto fail_rdc_data;
1600 }
1601 rc = tape_std_assign(device);
1602 if (rc)
1603 goto fail_rdc_data;
1604 if (rdc_data->data[31] == 0x13) {
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(dev_get_drvdata(&cdev->dev),
1706 &tape_discipline_3590);
1707 }
1708
1709 static struct ccw_driver tape_3590_driver = {
1710 .name = "tape_3590",
1711 .owner = THIS_MODULE,
1712 .ids = tape_3590_ids,
1713 .probe = tape_generic_probe,
1714 .remove = tape_generic_remove,
1715 .set_offline = tape_generic_offline,
1716 .set_online = tape_3590_online,
1717 .freeze = tape_generic_pm_suspend,
1718 };
1719
1720 /*
1721 * Setup discipline structure.
1722 */
1723 static int
1724 tape_3590_init(void)
1725 {
1726 int rc;
1727
1728 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));
1729 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
1730 #ifdef DBF_LIKE_HELL
1731 debug_set_level(TAPE_DBF_AREA, 6);
1732 #endif
1733
1734 DBF_EVENT(3, "3590 init\n");
1735 /* Register driver for 3590 tapes. */
1736 rc = ccw_driver_register(&tape_3590_driver);
1737 if (rc)
1738 DBF_EVENT(3, "3590 init failed\n");
1739 else
1740 DBF_EVENT(3, "3590 registered\n");
1741 return rc;
1742 }
1743
1744 static void
1745 tape_3590_exit(void)
1746 {
1747 ccw_driver_unregister(&tape_3590_driver);
1748
1749 debug_unregister(TAPE_DBF_AREA);
1750 }
1751
1752 MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
1753 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
1754 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
1755 MODULE_LICENSE("GPL");
1756
1757 module_init(tape_3590_init);
1758 module_exit(tape_3590_exit);