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Make various things static
[deliverable/linux.git] / drivers / s390 / char / tape_3590.c
CommitLineData
b6cba4ee
SB		 1/*
2 * drivers/s390/char/tape_3590.c
3 * tape device discipline for 3590 tapes.
4 *
cced1dd4 5 * Copyright IBM Corp. 2001,2006
b6cba4ee
SB		 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
b6cba4ee
SB		 11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/bio.h>
cced1dd4 14#include <asm/ebcdic.h>
b6cba4ee
SB		 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 */
25debug_info_t *TAPE_DBF_AREA = NULL;
26EXPORT_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
cced1dd4 34 * - Long Busy: implemented
b6cba4ee
SB		 35 * - Special Intercept: BRA
36 * - Read Alternate: implemented
37 *******************************************************************/
38
39#define PRINTK_HEADER "TAPE_3590: "
40
41static 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
cced1dd4
MH		 98static int crypt_supported(struct tape_device *device)
99{
100 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device));
101}
102
103static int crypt_enabled(struct tape_device *device)
104{
105 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device));
106}
107
108static 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
124static 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
141static 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
162static 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;
177invalid:
178 return -EINVAL;
179}
180
181static 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;
189invalid:
190 return -EINVAL;
191}
192
193/*
194 * Query KEKLs
195 */
196static 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;
227fail_request:
228 tape_free_request(request);
229fail_malloc:
230 kfree(int_kekls);
231 return rc;
232}
233
234/*
235 * IOCTL: Query KEKLs
236 */
237static 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;
259fail:
260 kfree(ext_kekls);
261 return rc;
262}
263
264static int tape_3590_mttell(struct tape_device *device, int mt_count);
265
266/*
267 * Set KEKLs
268 */
269static 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 */
300static 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);
319out:
320 kfree(ext_kekls);
321 return rc;
322}
323
324/*
325 * Enable encryption
326 */
327static 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 */
358static 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 */
387static 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
405static int tape_3590_sense_medium(struct tape_device *device);
406
407/*
408 * IOCTL: Query enryption status
409 */
410static 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
b6cba4ee
SB		 424/*
425 * 3590 IOCTL Overload
426 */
427static int
428tape_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 }
cced1dd4
MH		 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);
b6cba4ee
SB		 447 default:
448 return -EINVAL; /* no additional ioctls */
449 }
450}
451
452/*
453 * SENSE Medium: Get Sense data about medium state
454 */
455static int
456tape_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 */
471static int
472tape_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 */
486static int
487tape_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 */
507static void
508tape_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 */
544static int
545tape_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 */
2cc924b8
SB		 567struct work_handler_data {
568 struct tape_device *device;
569 enum tape_op op;
570 struct work_struct work;
571};
572
b6cba4ee 573static void
c1637532 574tape_3590_work_handler(struct work_struct *work)
b6cba4ee 575{
c1637532
MS		 576 struct work_handler_data *p =
577 container_of(work, struct work_handler_data, work);
b6cba4ee
SB		 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;
cced1dd4
MH		 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;
b6cba4ee
SB		 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
600static int
601tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
602{
2cc924b8 603 struct work_handler_data *p;
b6cba4ee
SB		 604
605 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
606 return -ENOMEM;
607
c1637532 608 INIT_WORK(&p->work, tape_3590_work_handler);
b6cba4ee
SB		 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 */
621static struct tape_request *
622tape_3590_bread(struct tape_device *device, struct request *req)
623{
624 struct tape_request *request;
625 struct ccw1 *ccw;
5705f702 626 int count = 0, start_block;
b6cba4ee
SB		 627 unsigned off;
628 char *dst;
629 struct bio_vec *bv;
5705f702 630 struct req_iterator iter;
b6cba4ee
SB		 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
5705f702
N		 636 rq_for_each_segment(bv, req, iter)
637 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
638
b6cba4ee
SB		 639 request = tape_alloc_request(2 + count + 1, 4);
640 if (IS_ERR(request))
641 return request;
642 request->op = TO_BLOCK;
643 *(__u32 *) request->cpdata = start_block;
644 ccw = request->cpaddr;
645 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte);
646
647 /*
648 * We always setup a nop after the mode set ccw. This slot is
649 * used in tape_std_check_locate to insert a locate ccw if the
650 * current tape position doesn't match the start block to be read.
651 */
652 ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
653
5705f702 654 rq_for_each_segment(bv, req, iter) {
6c92e699
JA		 655 dst = page_address(bv->bv_page) + bv->bv_offset;
656 for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) {
657 ccw->flags = CCW_FLAG_CC;
658 ccw->cmd_code = READ_FORWARD;
659 ccw->count = TAPEBLOCK_HSEC_SIZE;
660 set_normalized_cda(ccw, (void *) __pa(dst));
661 ccw++;
662 dst += TAPEBLOCK_HSEC_SIZE;
663 }
664 if (off > bv->bv_len)
665 BUG();
b6cba4ee
SB		 666 }
667 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
668 DBF_EVENT(6, "xBREDccwg\n");
669 return request;
670}
671
672static void
673tape_3590_free_bread(struct tape_request *request)
674{
675 struct ccw1 *ccw;
676
677 /* Last ccw is a nop and doesn't need clear_normalized_cda */
678 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++)
679 if (ccw->cmd_code == READ_FORWARD)
680 clear_normalized_cda(ccw);
681 tape_free_request(request);
682}
683
684/*
685 * check_locate is called just before the tape request is passed to
686 * the common io layer for execution. It has to check the current
687 * tape position and insert a locate ccw if it doesn't match the
688 * start block for the request.
689 */
690static void
691tape_3590_check_locate(struct tape_device *device, struct tape_request *request)
692{
693 __u32 *start_block;
694
695 start_block = (__u32 *) request->cpdata;
696 if (*start_block != device->blk_data.block_position) {
697 /* Add the start offset of the file to get the real block. */
698 *start_block += device->bof;
699 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
700 }
701}
702#endif
703
cced1dd4
MH		 704static void tape_3590_med_state_set(struct tape_device *device,
705 struct tape_3590_med_sense *sense)
706{
707 struct tape390_crypt_info *c_info;
708
709 c_info = &TAPE_3590_CRYPT_INFO(device);
710
1b9fd76e
MH		 711 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst);
712 switch (sense->macst) {
713 case 0x04:
714 case 0x05:
715 case 0x06:
cced1dd4
MH		 716 tape_med_state_set(device, MS_UNLOADED);
717 TAPE_3590_CRYPT_INFO(device).medium_status = 0;
718 return;
1b9fd76e
MH		 719 case 0x08:
720 case 0x09:
721 tape_med_state_set(device, MS_LOADED);
722 break;
723 default:
724 tape_med_state_set(device, MS_UNKNOWN);
cced1dd4
MH		 725 return;
726 }
cced1dd4
MH		 727 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK;
728 if (sense->flags & MSENSE_CRYPT_MASK) {
729 PRINT_INFO("Medium is encrypted (%04x)\n", sense->flags);
730 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK;
731 } else {
732 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags);
733 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK;
734 }
735}
736
b6cba4ee
SB		 737/*
738 * The done handler is called at device/channel end and wakes up the sleeping
739 * process
740 */
741static int
742tape_3590_done(struct tape_device *device, struct tape_request *request)
743{
cced1dd4 744 struct tape_3590_disc_data *disc_data;
b6cba4ee
SB		 745
746 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
cced1dd4 747 disc_data = device->discdata;
b6cba4ee
SB		 748
749 switch (request->op) {
750 case TO_BSB:
751 case TO_BSF:
752 case TO_DSE:
753 case TO_FSB:
754 case TO_FSF:
755 case TO_LBL:
756 case TO_RFO:
757 case TO_RBA:
758 case TO_REW:
759 case TO_WRI:
760 case TO_WTM:
761 case TO_BLOCK:
762 case TO_LOAD:
763 tape_med_state_set(device, MS_LOADED);
764 break;
765 case TO_RUN:
766 tape_med_state_set(device, MS_UNLOADED);
cced1dd4 767 tape_3590_schedule_work(device, TO_CRYPT_OFF);
b6cba4ee
SB		 768 break;
769 case TO_MSEN:
cced1dd4
MH		 770 tape_3590_med_state_set(device, request->cpdata);
771 break;
772 case TO_CRYPT_ON:
773 TAPE_3590_CRYPT_INFO(device).status
774 |= TAPE390_CRYPT_ON_MASK;
775 *(device->modeset_byte) |= 0x03;
776 break;
777 case TO_CRYPT_OFF:
778 TAPE_3590_CRYPT_INFO(device).status
779 &= ~TAPE390_CRYPT_ON_MASK;
780 *(device->modeset_byte) &= ~0x03;
b6cba4ee
SB		 781 break;
782 case TO_RBI: /* RBI seems to succeed even without medium loaded. */
783 case TO_NOP: /* Same to NOP. */
784 case TO_READ_CONFIG:
785 case TO_READ_ATTMSG:
786 case TO_DIS:
787 case TO_ASSIGN:
788 case TO_UNASSIGN:
b6cba4ee 789 case TO_SIZE:
cced1dd4
MH		 790 case TO_KEKL_SET:
791 case TO_KEKL_QUERY:
e2963062 792 case TO_RDC:
b6cba4ee
SB		 793 break;
794 }
795 return TAPE_IO_SUCCESS;
796}
797
798/*
799 * This fuction is called, when error recovery was successfull
800 */
801static inline int
802tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
803{
804 DBF_EVENT(3, "Error Recovery successfull for %s\n",
805 tape_op_verbose[request->op]);
806 return tape_3590_done(device, request);
807}
808
809/*
810 * This fuction is called, when error recovery was not successfull
811 */
812static inline int
813tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
814 struct irb *irb, int rc)
815{
816 DBF_EVENT(3, "Error Recovery failed for %s\n",
817 tape_op_verbose[request->op]);
818 tape_dump_sense_dbf(device, request, irb);
819 return rc;
820}
821
822/*
823 * Error Recovery do retry
824 */
825static inline int
826tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
827 struct irb *irb)
828{
829 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
830 tape_dump_sense_dbf(device, request, irb);
831 return TAPE_IO_RETRY;
832}
833
834/*
835 * Handle unsolicited interrupts
836 */
837static int
838tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
839{
23d805b6 840 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END)
b6cba4ee
SB		 841 /* Probably result of halt ssch */
842 return TAPE_IO_PENDING;
23d805b6 843 else if (irb->scsw.cmd.dstat == 0x85)
1b9fd76e
MH		 844 /* Device Ready */
845 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id);
23d805b6 846 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
b6cba4ee 847 tape_3590_schedule_work(device, TO_READ_ATTMSG);
1b9fd76e 848 } else {
b6cba4ee
SB		 849 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
850 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
851 tape_dump_sense(device, NULL, irb);
852 }
1b9fd76e
MH		 853 /* check medium state */
854 tape_3590_schedule_work(device, TO_MSEN);
b6cba4ee
SB		 855 return TAPE_IO_SUCCESS;
856}
857
858/*
859 * Basic Recovery routine
860 */
861static int
862tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
863 struct irb *irb, int rc)
864{
865 struct tape_3590_sense *sense;
866
867 sense = (struct tape_3590_sense *) irb->ecw;
868
869 switch (sense->bra) {
870 case SENSE_BRA_PER:
871 return tape_3590_erp_failed(device, request, irb, rc);
872 case SENSE_BRA_CONT:
873 return tape_3590_erp_succeded(device, request);
874 case SENSE_BRA_RE:
875 return tape_3590_erp_retry(device, request, irb);
876 case SENSE_BRA_DRE:
877 return tape_3590_erp_failed(device, request, irb, rc);
878 default:
879 PRINT_ERR("Unknown BRA %x - This should not happen!\n",
880 sense->bra);
881 BUG();
882 return TAPE_IO_STOP;
883 }
884}
885
886/*
887 * RDL: Read Device (buffered) log
888 */
889static int
890tape_3590_erp_read_buf_log(struct tape_device *device,
891 struct tape_request *request, struct irb *irb)
892{
893 /*
894 * We just do the basic error recovery at the moment (retry).
895 * Perhaps in the future, we read the log and dump it somewhere...
896 */
897 return tape_3590_erp_basic(device, request, irb, -EIO);
898}
899
900/*
901 * SWAP: Swap Devices
902 */
903static int
904tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
905 struct irb *irb)
906{
907 /*
908 * This error recovery should swap the tapes
909 * if the original has a problem. The operation
910 * should proceed with the new tape... this
911 * should probably be done in user space!
912 */
2a0217d5 913 PRINT_WARN("(%s): Swap Tape Device!\n", dev_name(&device->cdev->dev));
b6cba4ee
SB		 914 return tape_3590_erp_basic(device, request, irb, -EIO);
915}
916
917/*
918 * LBY: Long Busy
919 */
920static int
921tape_3590_erp_long_busy(struct tape_device *device,
922 struct tape_request *request, struct irb *irb)
923{
cced1dd4
MH		 924 DBF_EVENT(6, "Device is busy\n");
925 return TAPE_IO_LONG_BUSY;
b6cba4ee
SB		 926}
927
928/*
929 * SPI: Special Intercept
930 */
931static int
932tape_3590_erp_special_interrupt(struct tape_device *device,
933 struct tape_request *request, struct irb *irb)
934{
935 return tape_3590_erp_basic(device, request, irb, -EIO);
936}
937
938/*
939 * RDA: Read Alternate
940 */
941static int
942tape_3590_erp_read_alternate(struct tape_device *device,
943 struct tape_request *request, struct irb *irb)
944{
945 struct tape_3590_disc_data *data;
946
947 /*
948 * The issued Read Backward or Read Previous command is not
949 * supported by the device
950 * The recovery action should be to issue another command:
951 * Read Revious: if Read Backward is not supported
952 * Read Backward: if Read Previous is not supported
953 */
954 data = device->discdata;
955 if (data->read_back_op == READ_PREVIOUS) {
956 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
957 device->cdev_id);
958 data->read_back_op = READ_BACKWARD;
959 } else {
960 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
961 device->cdev_id);
962 data->read_back_op = READ_PREVIOUS;
963 }
964 tape_3590_read_opposite(device, request);
965 return tape_3590_erp_retry(device, request, irb);
966}
967
968/*
969 * Error Recovery read opposite
970 */
971static int
972tape_3590_erp_read_opposite(struct tape_device *device,
973 struct tape_request *request, struct irb *irb)
974{
975 switch (request->op) {
976 case TO_RFO:
977 /*
978 * We did read forward, but the data could not be read.
979 * We will read backward and then skip forward again.
980 */
981 tape_3590_read_opposite(device, request);
982 return tape_3590_erp_retry(device, request, irb);
983 case TO_RBA:
984 /* We tried to read forward and backward, but hat no success */
985 return tape_3590_erp_failed(device, request, irb, -EIO);
986 break;
987 default:
988 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n",
989 tape_op_verbose[request->op]);
990 return tape_3590_erp_failed(device, request, irb, -EIO);
991 }
992}
993
994/*
995 * Print an MIM (Media Information Message) (message code f0)
996 */
997static void
998tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
999{
1000 struct tape_3590_sense *sense;
1001
1002 sense = (struct tape_3590_sense *) irb->ecw;
1003 /* Exception Message */
1004 switch (sense->fmt.f70.emc) {
1005 case 0x02:
2a0217d5
KS		 1006 PRINT_WARN("(%s): Data degraded\n",
1007 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1008 break;
1009 case 0x03:
1010 PRINT_WARN("(%s): Data degraded in partion %i\n",
2a0217d5 1011 dev_name(&device->cdev->dev), sense->fmt.f70.mp);
b6cba4ee
SB		 1012 break;
1013 case 0x04:
2a0217d5
KS		 1014 PRINT_WARN("(%s): Medium degraded\n",
1015 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1016 break;
1017 case 0x05:
1018 PRINT_WARN("(%s): Medium degraded in partition %i\n",
2a0217d5 1019 dev_name(&device->cdev->dev), sense->fmt.f70.mp);
b6cba4ee
SB		 1020 break;
1021 case 0x06:
2a0217d5
KS		 1022 PRINT_WARN("(%s): Block 0 Error\n",
1023 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1024 break;
1025 case 0x07:
1026 PRINT_WARN("(%s): Medium Exception 0x%02x\n",
2a0217d5 1027 dev_name(&device->cdev->dev), sense->fmt.f70.md);
b6cba4ee
SB		 1028 break;
1029 default:
1030 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n",
2a0217d5 1031 dev_name(&device->cdev->dev), sense->fmt.f70.emc);
b6cba4ee
SB		 1032 break;
1033 }
1034 /* Service Message */
1035 switch (sense->fmt.f70.smc) {
1036 case 0x02:
1037 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n",
2a0217d5 1038 dev_name(&device->cdev->dev), sense->fmt.f70.md);
b6cba4ee
SB		 1039 break;
1040 default:
1041 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n",
2a0217d5 1042 dev_name(&device->cdev->dev), sense->fmt.f70.smc);
b6cba4ee
SB		 1043 break;
1044 }
1045}
1046
1047/*
1048 * Print an I/O Subsystem Service Information Message (message code f1)
1049 */
1050static void
1051tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
1052{
1053 struct tape_3590_sense *sense;
1054
1055 sense = (struct tape_3590_sense *) irb->ecw;
1056 /* Exception Message */
1057 switch (sense->fmt.f71.emc) {
1058 case 0x01:
1059 PRINT_WARN("(%s): Effect of failure is unknown\n",
2a0217d5 1060 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1061 break;
1062 case 0x02:
1063 PRINT_WARN("(%s): CU Exception - no performance impact\n",
2a0217d5 1064 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1065 break;
1066 case 0x03:
1067 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n",
2a0217d5 1068 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]);
b6cba4ee
SB		 1069 break;
1070 case 0x04:
1071 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n",
2a0217d5 1072 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]);
b6cba4ee
SB		 1073 break;
1074 case 0x05:
1075 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n",
2a0217d5 1076 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]);
b6cba4ee
SB		 1077 break;
1078 case 0x06:
1079 PRINT_WARN("(%s): CU Exception on node 0x%02x\n",
2a0217d5 1080 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]);
b6cba4ee
SB		 1081 break;
1082 case 0x07:
1083 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n",
2a0217d5 1084 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]);
b6cba4ee
SB		 1085 break;
1086 default:
1087 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n",
2a0217d5 1088 dev_name(&device->cdev->dev), sense->fmt.f71.emc);
b6cba4ee
SB		 1089 }
1090 /* Service Message */
1091 switch (sense->fmt.f71.smc) {
1092 case 0x01:
1093 PRINT_WARN("(%s): Repair impact is unknown\n",
2a0217d5 1094 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1095 break;
1096 case 0x02:
1097 PRINT_WARN("(%s): Repair will not impact cu performance\n",
2a0217d5 1098 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1099 break;
1100 case 0x03:
1101 if (sense->fmt.f71.mdf == 0)
1102 PRINT_WARN("(%s): Repair will disable node "
1103 "0x%x on CU\n",
2a0217d5 1104 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1105 sense->fmt.f71.md[1]);
1106 else
1107 PRINT_WARN("(%s): Repair will disable nodes "
1108 "(0x%x-0x%x) on CU\n",
2a0217d5 1109 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1110 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1111 break;
1112 case 0x04:
1113 if (sense->fmt.f71.mdf == 0)
1114 PRINT_WARN("(%s): Repair will disable cannel path "
1115 "0x%x on CU\n",
2a0217d5 1116 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1117 sense->fmt.f71.md[1]);
1118 else
1119 PRINT_WARN("(%s): Repair will disable cannel paths "
1120 "(0x%x-0x%x) on CU\n",
2a0217d5 1121 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1122 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1123 break;
1124 case 0x05:
1125 if (sense->fmt.f71.mdf == 0)
1126 PRINT_WARN("(%s): Repair will disable device path "
1127 "0x%x on CU\n",
2a0217d5 1128 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1129 sense->fmt.f71.md[1]);
1130 else
1131 PRINT_WARN("(%s): Repair will disable device paths "
1132 "(0x%x-0x%x) on CU\n",
2a0217d5 1133 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1134 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1135 break;
1136 case 0x06:
1137 if (sense->fmt.f71.mdf == 0)
1138 PRINT_WARN("(%s): Repair will disable library path "
1139 "0x%x on CU\n",
2a0217d5 1140 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1141 sense->fmt.f71.md[1]);
1142 else
1143 PRINT_WARN("(%s): Repair will disable library paths "
1144 "(0x%x-0x%x) on CU\n",
2a0217d5 1145 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1146 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1147 break;
1148 case 0x07:
1149 PRINT_WARN("(%s): Repair will disable access to CU\n",
2a0217d5 1150 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1151 break;
1152 default:
1153 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n",
2a0217d5 1154 dev_name(&device->cdev->dev), sense->fmt.f71.smc);
b6cba4ee
SB		 1155 }
1156}
1157
1158/*
1159 * Print an Device Subsystem Service Information Message (message code f2)
1160 */
1161static void
1162tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
1163{
1164 struct tape_3590_sense *sense;
1165
1166 sense = (struct tape_3590_sense *) irb->ecw;
1167 /* Exception Message */
1168 switch (sense->fmt.f71.emc) {
1169 case 0x01:
1170 PRINT_WARN("(%s): Effect of failure is unknown\n",
2a0217d5 1171 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1172 break;
1173 case 0x02:
1174 PRINT_WARN("(%s): DV Exception - no performance impact\n",
2a0217d5 1175 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1176 break;
1177 case 0x03:
1178 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n",
2a0217d5 1179 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]);
b6cba4ee
SB		 1180 break;
1181 case 0x04:
1182 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n",
2a0217d5 1183 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]);
b6cba4ee
SB		 1184 break;
1185 case 0x05:
1186 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n",
2a0217d5 1187 dev_name(&device->cdev->dev), sense->fmt.f71.md[0]);
b6cba4ee
SB		 1188 break;
1189 case 0x06:
1190 PRINT_WARN("(%s): DV Exception in tape path\n",
2a0217d5 1191 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1192 break;
1193 case 0x07:
1194 PRINT_WARN("(%s): DV Exception in drive\n",
2a0217d5 1195 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1196 break;
1197 default:
1198 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n",
2a0217d5 1199 dev_name(&device->cdev->dev), sense->fmt.f71.emc);
b6cba4ee
SB		 1200 }
1201 /* Service Message */
1202 switch (sense->fmt.f71.smc) {
1203 case 0x01:
1204 PRINT_WARN("(%s): Repair impact is unknown\n",
2a0217d5 1205 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1206 break;
1207 case 0x02:
1208 PRINT_WARN("(%s): Repair will not impact device performance\n",
2a0217d5 1209 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1210 break;
1211 case 0x03:
1212 if (sense->fmt.f71.mdf == 0)
1213 PRINT_WARN("(%s): Repair will disable channel path "
1214 "0x%x on DV\n",
2a0217d5 1215 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1216 sense->fmt.f71.md[1]);
1217 else
1218 PRINT_WARN("(%s): Repair will disable channel path "
1219 "(0x%x-0x%x) on DV\n",
2a0217d5 1220 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1221 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1222 break;
1223 case 0x04:
1224 if (sense->fmt.f71.mdf == 0)
1225 PRINT_WARN("(%s): Repair will disable interface 0x%x "
1226 "on DV\n",
2a0217d5 1227 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1228 sense->fmt.f71.md[1]);
1229 else
1230 PRINT_WARN("(%s): Repair will disable interfaces "
1231 "(0x%x-0x%x) on DV\n",
2a0217d5 1232 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1233 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1234 break;
1235 case 0x05:
1236 if (sense->fmt.f71.mdf == 0)
1237 PRINT_WARN("(%s): Repair will disable loader 0x%x "
1238 "on DV\n",
2a0217d5 1239 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1240 sense->fmt.f71.md[1]);
1241 else
1242 PRINT_WARN("(%s): Repair will disable loader "
1243 "(0x%x-0x%x) on DV\n",
2a0217d5 1244 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1245 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1246 break;
1247 case 0x07:
1248 PRINT_WARN("(%s): Repair will disable access to DV\n",
2a0217d5 1249 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1250 break;
1251 case 0x08:
1252 if (sense->fmt.f71.mdf == 0)
1253 PRINT_WARN("(%s): Repair will disable message "
1254 "display 0x%x on DV\n",
2a0217d5 1255 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1256 sense->fmt.f71.md[1]);
1257 else
1258 PRINT_WARN("(%s): Repair will disable message "
1259 "displays (0x%x-0x%x) on DV\n",
2a0217d5 1260 dev_name(&device->cdev->dev),
b6cba4ee
SB		 1261 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1262 break;
1263 case 0x09:
2a0217d5 1264 PRINT_WARN("(%s): Clean DV\n", dev_name(&device->cdev->dev));
b6cba4ee
SB		 1265 break;
1266 default:
1267 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n",
2a0217d5 1268 dev_name(&device->cdev->dev), sense->fmt.f71.smc);
b6cba4ee
SB		 1269 }
1270}
1271
1272/*
1273 * Print standard ERA Message
1274 */
1275static void
1276tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
1277{
1278 struct tape_3590_sense *sense;
1279
1280 sense = (struct tape_3590_sense *) irb->ecw;
1281 if (sense->mc == 0)
1282 return;
1283 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
1284 if (tape_3590_msg[sense->mc] != NULL)
2a0217d5 1285 PRINT_WARN("(%s): %s\n", dev_name(&device->cdev->dev),
b6cba4ee
SB		 1286 tape_3590_msg[sense->mc]);
1287 else {
1288 PRINT_WARN("(%s): Message Code 0x%x\n",
2a0217d5 1289 dev_name(&device->cdev->dev), sense->mc);
b6cba4ee
SB		 1290 }
1291 return;
1292 }
1293 if (sense->mc == 0xf0) {
1294 /* Standard Media Information Message */
1295 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, "
2a0217d5 1296 "RC=%02x-%04x-%02x\n", dev_name(&device->cdev->dev),
b6cba4ee
SB		 1297 sense->fmt.f70.sev, sense->mc,
1298 sense->fmt.f70.emc, sense->fmt.f70.smc,
1299 sense->fmt.f70.refcode, sense->fmt.f70.mid,
1300 sense->fmt.f70.fid);
1301 tape_3590_print_mim_msg_f0(device, irb);
1302 return;
1303 }
1304 if (sense->mc == 0xf1) {
1305 /* Standard I/O Subsystem Service Information Message */
1306 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, "
1307 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
2a0217d5 1308 dev_name(&device->cdev->dev), sense->fmt.f71.sev,
b6cba4ee
SB		 1309 device->cdev->id.dev_model,
1310 sense->mc, sense->fmt.f71.emc,
1311 sense->fmt.f71.smc, sense->fmt.f71.refcode1,
1312 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
1313 tape_3590_print_io_sim_msg_f1(device, irb);
1314 return;
1315 }
1316 if (sense->mc == 0xf2) {
1317 /* Standard Device Service Information Message */
1318 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, "
1319 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
2a0217d5 1320 dev_name(&device->cdev->dev), sense->fmt.f71.sev,
b6cba4ee
SB		 1321 device->cdev->id.dev_model,
1322 sense->mc, sense->fmt.f71.emc,
1323 sense->fmt.f71.smc, sense->fmt.f71.refcode1,
1324 sense->fmt.f71.refcode2, sense->fmt.f71.refcode3);
1325 tape_3590_print_dev_sim_msg_f2(device, irb);
1326 return;
1327 }
1328 if (sense->mc == 0xf3) {
1329 /* Standard Library Service Information Message */
1330 return;
1331 }
1332 PRINT_WARN("(%s): Device Message(%x)\n",
2a0217d5 1333 dev_name(&device->cdev->dev), sense->mc);
b6cba4ee
SB		 1334}
1335
cced1dd4
MH		 1336static int tape_3590_crypt_error(struct tape_device *device,
1337 struct tape_request *request, struct irb *irb)
1338{
1339 u8 cu_rc, ekm_rc1;
1340 u16 ekm_rc2;
1341 u32 drv_rc;
2a0217d5
KS		 1342 const char *bus_id;
1343 char *sense;
cced1dd4
MH		 1344
1345 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data;
2a0217d5 1346 bus_id = dev_name(&device->cdev->dev);
cced1dd4
MH		 1347 cu_rc = sense[0];
1348 drv_rc = *((u32*) &sense[5]) & 0xffffff;
1349 ekm_rc1 = sense[9];
1350 ekm_rc2 = *((u16*) &sense[10]);
1351 if ((cu_rc == 0) && (ekm_rc2 == 0xee31))
1352 /* key not defined on EKM */
1353 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED);
1354 if ((cu_rc == 1) || (cu_rc == 2))
1355 /* No connection to EKM */
1356 return tape_3590_erp_basic(device, request, irb, -ENOTCONN);
1357
1358 PRINT_ERR("(%s): Unable to get encryption key from EKM\n", bus_id);
1359 PRINT_ERR("(%s): CU=%02X DRIVE=%06X EKM=%02X:%04X\n", bus_id, cu_rc,
1360 drv_rc, ekm_rc1, ekm_rc2);
1361
1362 return tape_3590_erp_basic(device, request, irb, -ENOKEY);
1363}
1364
b6cba4ee
SB		 1365/*
1366 * 3590 error Recovery routine:
1367 * If possible, it tries to recover from the error. If this is not possible,
1368 * inform the user about the problem.
1369 */
1370static int
1371tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
1372 struct irb *irb)
1373{
1374 struct tape_3590_sense *sense;
1375 int rc;
1376
1377#ifdef CONFIG_S390_TAPE_BLOCK
1378 if (request->op == TO_BLOCK) {
1379 /*
1380 * Recovery for block device requests. Set the block_position
1381 * to something invalid and retry.
1382 */
1383 device->blk_data.block_position = -1;
1384 if (request->retries-- <= 0)
1385 return tape_3590_erp_failed(device, request, irb, -EIO);
1386 else
1387 return tape_3590_erp_retry(device, request, irb);
1388 }
1389#endif
1390
1391 sense = (struct tape_3590_sense *) irb->ecw;
1392
cced1dd4
MH		 1393 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc);
1394
b6cba4ee
SB		 1395 /*
1396 * First check all RC-QRCs where we want to do something special
1397 * - "break": basic error recovery is done
1398 * - "goto out:": just print error message if available
1399 */
1400 rc = -EIO;
1401 switch (sense->rc_rqc) {
1402
1403 case 0x1110:
1404 tape_3590_print_era_msg(device, irb);
1405 return tape_3590_erp_read_buf_log(device, request, irb);
1406
1407 case 0x2011:
1408 tape_3590_print_era_msg(device, irb);
1409 return tape_3590_erp_read_alternate(device, request, irb);
1410
1411 case 0x2230:
1412 case 0x2231:
1413 tape_3590_print_era_msg(device, irb);
1414 return tape_3590_erp_special_interrupt(device, request, irb);
cced1dd4
MH		 1415 case 0x2240:
1416 return tape_3590_crypt_error(device, request, irb);
b6cba4ee
SB		 1417
1418 case 0x3010:
1419 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
1420 device->cdev_id);
1421 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1422 case 0x3012:
1423 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
1424 device->cdev_id);
1425 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1426 case 0x3020:
1427 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
1428 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1429
1430 case 0x3122:
1431 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
1432 device->cdev_id);
1433 return tape_3590_erp_basic(device, request, irb, -EIO);
1434 case 0x3123:
1435 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
1436 device->cdev_id);
1437 tape_med_state_set(device, MS_UNLOADED);
cced1dd4 1438 tape_3590_schedule_work(device, TO_CRYPT_OFF);
b6cba4ee
SB		 1439 return tape_3590_erp_basic(device, request, irb, 0);
1440
1441 case 0x4010:
1442 /*
1443 * print additional msg since default msg
1444 * "device intervention" is not very meaningfull
1445 */
1446 PRINT_WARN("(%s): Tape operation when medium not loaded\n",
2a0217d5 1447 dev_name(&device->cdev->dev));
b6cba4ee 1448 tape_med_state_set(device, MS_UNLOADED);
cced1dd4 1449 tape_3590_schedule_work(device, TO_CRYPT_OFF);
b6cba4ee
SB		 1450 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1451 case 0x4012: /* Device Long Busy */
cced1dd4
MH		 1452 /* XXX: Also use long busy handling here? */
1453 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id);
b6cba4ee 1454 tape_3590_print_era_msg(device, irb);
cced1dd4
MH		 1455 return tape_3590_erp_basic(device, request, irb, -EBUSY);
1456 case 0x4014:
1457 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id);
b6cba4ee
SB		 1458 return tape_3590_erp_long_busy(device, request, irb);
1459
1460 case 0x5010:
1461 if (sense->rac == 0xd0) {
1462 /* Swap */
1463 tape_3590_print_era_msg(device, irb);
1464 return tape_3590_erp_swap(device, request, irb);
1465 }
1466 if (sense->rac == 0x26) {
1467 /* Read Opposite */
1468 tape_3590_print_era_msg(device, irb);
1469 return tape_3590_erp_read_opposite(device, request,
1470 irb);
1471 }
1472 return tape_3590_erp_basic(device, request, irb, -EIO);
1473 case 0x5020:
1474 case 0x5021:
1475 case 0x5022:
1476 case 0x5040:
1477 case 0x5041:
1478 case 0x5042:
1479 tape_3590_print_era_msg(device, irb);
1480 return tape_3590_erp_swap(device, request, irb);
1481
1482 case 0x5110:
1483 case 0x5111:
1484 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1485
1486 case 0x5120:
1487 case 0x1120:
1488 tape_med_state_set(device, MS_UNLOADED);
cced1dd4 1489 tape_3590_schedule_work(device, TO_CRYPT_OFF);
b6cba4ee
SB		 1490 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1491
1492 case 0x6020:
1493 PRINT_WARN("(%s): Cartridge of wrong type ?\n",
2a0217d5 1494 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1495 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1496
1497 case 0x8011:
1498 PRINT_WARN("(%s): Another host has reserved the tape device\n",
2a0217d5 1499 dev_name(&device->cdev->dev));
b6cba4ee
SB		 1500 return tape_3590_erp_basic(device, request, irb, -EPERM);
1501 case 0x8013:
5d67d164 1502 PRINT_WARN("(%s): Another host has privileged access to the "
2a0217d5 1503 "tape device\n", dev_name(&device->cdev->dev));
b6cba4ee 1504 PRINT_WARN("(%s): To solve the problem unload the current "
2a0217d5 1505 "cartridge!\n", dev_name(&device->cdev->dev));
b6cba4ee
SB		 1506 return tape_3590_erp_basic(device, request, irb, -EPERM);
1507 default:
1508 return tape_3590_erp_basic(device, request, irb, -EIO);
1509 }
1510}
1511
1512/*
1513 * 3590 interrupt handler:
1514 */
1515static int
1516tape_3590_irq(struct tape_device *device, struct tape_request *request,
1517 struct irb *irb)
1518{
1519 if (request == NULL)
1520 return tape_3590_unsolicited_irq(device, irb);
1521
23d805b6
PO		 1522 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) &&
1523 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) &&
1524 (request->op == TO_WRI)) {
b6cba4ee
SB		 1525 /* Write at end of volume */
1526 DBF_EVENT(2, "End of volume\n");
1527 return tape_3590_erp_failed(device, request, irb, -ENOSPC);
1528 }
1529
23d805b6 1530 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
b6cba4ee
SB		 1531 return tape_3590_unit_check(device, request, irb);
1532
23d805b6
PO		 1533 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
1534 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) {
b6cba4ee
SB		 1535 if (request->op == TO_FSB || request->op == TO_BSB)
1536 request->rescnt++;
1537 else
1538 DBF_EVENT(5, "Unit Exception!\n");
1539 }
1540
1541 return tape_3590_done(device, request);
1542 }
1543
23d805b6 1544 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) {
b6cba4ee
SB		 1545 DBF_EVENT(2, "cannel end\n");
1546 return TAPE_IO_PENDING;
1547 }
1548
23d805b6 1549 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
b6cba4ee
SB		 1550 DBF_EVENT(2, "Unit Attention when busy..\n");
1551 return TAPE_IO_PENDING;
1552 }
1553
1554 DBF_EVENT(6, "xunknownirq\n");
1555 PRINT_ERR("Unexpected interrupt.\n");
1556 PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]);
1557 tape_dump_sense(device, request, irb);
1558 return TAPE_IO_STOP;
1559}
1560
e2963062
MH		 1561
1562static int tape_3590_read_dev_chars(struct tape_device *device,
1563 struct tape_3590_rdc_data *rdc_data)
1564{
1565 int rc;
1566 struct tape_request *request;
1567
1568 request = tape_alloc_request(1, sizeof(*rdc_data));
1569 if (IS_ERR(request))
1570 return PTR_ERR(request);
1571 request->op = TO_RDC;
1572 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data),
1573 request->cpdata);
1574 rc = tape_do_io(device, request);
1575 if (rc == 0)
1576 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data));
1577 tape_free_request(request);
1578 return rc;
1579}
1580
b6cba4ee
SB		 1581/*
1582 * Setup device function
1583 */
1584static int
1585tape_3590_setup_device(struct tape_device *device)
1586{
1587 int rc;
1588 struct tape_3590_disc_data *data;
e2963062 1589 struct tape_3590_rdc_data *rdc_data;
b6cba4ee
SB		 1590
1591 DBF_EVENT(6, "3590 device setup\n");
cced1dd4 1592 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA);
b6cba4ee
SB		 1593 if (data == NULL)
1594 return -ENOMEM;
1595 data->read_back_op = READ_PREVIOUS;
1596 device->discdata = data;
1597
e2963062 1598 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA);
cced1dd4
MH		 1599 if (!rdc_data) {
1600 rc = -ENOMEM;
1601 goto fail_kmalloc;
1602 }
e2963062 1603 rc = tape_3590_read_dev_chars(device, rdc_data);
cced1dd4
MH		 1604 if (rc) {
1605 DBF_LH(3, "Read device characteristics failed!\n");
1783e60f 1606 goto fail_rdc_data;
cced1dd4
MH		 1607 }
1608 rc = tape_std_assign(device);
1609 if (rc)
1610 goto fail_rdc_data;
e2963062 1611 if (rdc_data->data[31] == 0x13) {
cced1dd4
MH		 1612 PRINT_INFO("Device has crypto support\n");
1613 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK;
1614 tape_3592_disable_crypt(device);
1615 } else {
1616 DBF_EVENT(6, "Device has NO crypto support\n");
b6cba4ee 1617 }
cced1dd4
MH		 1618 /* Try to find out if medium is loaded */
1619 rc = tape_3590_sense_medium(device);
1620 if (rc) {
1621 DBF_LH(3, "3590 medium sense returned %d\n", rc);
1622 goto fail_rdc_data;
1623 }
1624 return 0;
b6cba4ee 1625
cced1dd4
MH		 1626fail_rdc_data:
1627 kfree(rdc_data);
1628fail_kmalloc:
1629 kfree(data);
b6cba4ee
SB		 1630 return rc;
1631}
1632
1633/*
1634 * Cleanup device function
1635 */
1636static void
1637tape_3590_cleanup_device(struct tape_device *device)
1638{
2cc924b8 1639 flush_scheduled_work();
b6cba4ee
SB		 1640 tape_std_unassign(device);
1641
1642 kfree(device->discdata);
1643 device->discdata = NULL;
1644}
1645
1646/*
1647 * List of 3590 magnetic tape commands.
1648 */
1649static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = {
1650 [MTRESET] = tape_std_mtreset,
1651 [MTFSF] = tape_std_mtfsf,
1652 [MTBSF] = tape_std_mtbsf,
1653 [MTFSR] = tape_std_mtfsr,
1654 [MTBSR] = tape_std_mtbsr,
1655 [MTWEOF] = tape_std_mtweof,
1656 [MTREW] = tape_std_mtrew,
1657 [MTOFFL] = tape_std_mtoffl,
1658 [MTNOP] = tape_std_mtnop,
1659 [MTRETEN] = tape_std_mtreten,
1660 [MTBSFM] = tape_std_mtbsfm,
1661 [MTFSFM] = tape_std_mtfsfm,
1662 [MTEOM] = tape_std_mteom,
1663 [MTERASE] = tape_std_mterase,
1664 [MTRAS1] = NULL,
1665 [MTRAS2] = NULL,
1666 [MTRAS3] = NULL,
1667 [MTSETBLK] = tape_std_mtsetblk,
1668 [MTSETDENSITY] = NULL,
1669 [MTSEEK] = tape_3590_mtseek,
1670 [MTTELL] = tape_3590_mttell,
1671 [MTSETDRVBUFFER] = NULL,
1672 [MTFSS] = NULL,
1673 [MTBSS] = NULL,
1674 [MTWSM] = NULL,
1675 [MTLOCK] = NULL,
1676 [MTUNLOCK] = NULL,
1677 [MTLOAD] = tape_std_mtload,
1678 [MTUNLOAD] = tape_std_mtunload,
1679 [MTCOMPRESSION] = tape_std_mtcompression,
1680 [MTSETPART] = NULL,
1681 [MTMKPART] = NULL
1682};
1683
1684/*
1685 * Tape discipline structure for 3590.
1686 */
1687static struct tape_discipline tape_discipline_3590 = {
1688 .owner = THIS_MODULE,
1689 .setup_device = tape_3590_setup_device,
1690 .cleanup_device = tape_3590_cleanup_device,
1691 .process_eov = tape_std_process_eov,
1692 .irq = tape_3590_irq,
1693 .read_block = tape_std_read_block,
1694 .write_block = tape_std_write_block,
1695#ifdef CONFIG_S390_TAPE_BLOCK
1696 .bread = tape_3590_bread,
1697 .free_bread = tape_3590_free_bread,
1698 .check_locate = tape_3590_check_locate,
1699#endif
1700 .ioctl_fn = tape_3590_ioctl,
1701 .mtop_array = tape_3590_mtop
1702};
1703
1704static struct ccw_device_id tape_3590_ids[] = {
1705 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},
2cc924b8 1706 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},
b6cba4ee
SB		 1707 { /* end of list */ }
1708};
1709
1710static int
1711tape_3590_online(struct ccw_device *cdev)
1712{
1713 return tape_generic_online(cdev->dev.driver_data,
1714 &tape_discipline_3590);
1715}
1716
1717static int
1718tape_3590_offline(struct ccw_device *cdev)
1719{
1720 return tape_generic_offline(cdev->dev.driver_data);
1721}
1722
1723static struct ccw_driver tape_3590_driver = {
1724 .name = "tape_3590",
1725 .owner = THIS_MODULE,
1726 .ids = tape_3590_ids,
1727 .probe = tape_generic_probe,
1728 .remove = tape_generic_remove,
1729 .set_offline = tape_3590_offline,
1730 .set_online = tape_3590_online,
1731};
1732
1733/*
1734 * Setup discipline structure.
1735 */
1736static int
1737tape_3590_init(void)
1738{
1739 int rc;
1740
1741 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));
1742 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
1743#ifdef DBF_LIKE_HELL
1744 debug_set_level(TAPE_DBF_AREA, 6);
1745#endif
1746
1747 DBF_EVENT(3, "3590 init\n");
1748 /* Register driver for 3590 tapes. */
1749 rc = ccw_driver_register(&tape_3590_driver);
1750 if (rc)
1751 DBF_EVENT(3, "3590 init failed\n");
1752 else
1753 DBF_EVENT(3, "3590 registered\n");
1754 return rc;
1755}
1756
1757static void
1758tape_3590_exit(void)
1759{
1760 ccw_driver_unregister(&tape_3590_driver);
1761
1762 debug_unregister(TAPE_DBF_AREA);
1763}
1764
1765MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
1766MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
1767MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
1768MODULE_LICENSE("GPL");
1769
1770module_init(tape_3590_init);
1771module_exit(tape_3590_exit);
Linux kernel - Deliverables
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