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12
13#define KMSG_COMPONENT "tape"
14#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
15
16#include <linux/stddef.h>
17#include <linux/kernel.h>
18#include <linux/bio.h>
19#include <linux/timer.h>
20
21#include <asm/types.h>
22#include <asm/idals.h>
23#include <asm/ebcdic.h>
24#include <asm/tape390.h>
25
26#define TAPE_DBF_AREA tape_core_dbf
27
28#include "tape.h"
29#include "tape_std.h"
30
31
32
33
34static void
35tape_std_assign_timeout(unsigned long data)
36{
37 struct tape_request * request;
38 struct tape_device * device;
39 int rc;
40
41 request = (struct tape_request *) data;
42 device = request->device;
43 BUG_ON(!device);
44
45 DBF_EVENT(3, "%08x: Assignment timeout. Device busy.\n",
46 device->cdev_id);
47 rc = tape_cancel_io(device, request);
48 if(rc)
49 DBF_EVENT(3, "(%08x): Assign timeout: Cancel failed with rc = "
50 "%i\n", device->cdev_id, rc);
51}
52
53int
54tape_std_assign(struct tape_device *device)
55{
56 int rc;
57 struct timer_list timeout;
58 struct tape_request *request;
59
60 request = tape_alloc_request(2, 11);
61 if (IS_ERR(request))
62 return PTR_ERR(request);
63
64 request->op = TO_ASSIGN;
65 tape_ccw_cc(request->cpaddr, ASSIGN, 11, request->cpdata);
66 tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
67
68
69
70
71
72
73 init_timer_on_stack(&timeout);
74 timeout.function = tape_std_assign_timeout;
75 timeout.data = (unsigned long) request;
76 timeout.expires = jiffies + 2 * HZ;
77 add_timer(&timeout);
78
79 rc = tape_do_io_interruptible(device, request);
80
81 del_timer_sync(&timeout);
82 destroy_timer_on_stack(&timeout);
83
84 if (rc != 0) {
85 DBF_EVENT(3, "%08x: assign failed - device might be busy\n",
86 device->cdev_id);
87 } else {
88 DBF_EVENT(3, "%08x: Tape assigned\n", device->cdev_id);
89 }
90 tape_free_request(request);
91 return rc;
92}
93
94
95
96
97int
98tape_std_unassign (struct tape_device *device)
99{
100 int rc;
101 struct tape_request *request;
102
103 if (device->tape_state == TS_NOT_OPER) {
104 DBF_EVENT(3, "(%08x): Can't unassign device\n",
105 device->cdev_id);
106 return -EIO;
107 }
108
109 request = tape_alloc_request(2, 11);
110 if (IS_ERR(request))
111 return PTR_ERR(request);
112
113 request->op = TO_UNASSIGN;
114 tape_ccw_cc(request->cpaddr, UNASSIGN, 11, request->cpdata);
115 tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
116
117 if ((rc = tape_do_io(device, request)) != 0) {
118 DBF_EVENT(3, "%08x: Unassign failed\n", device->cdev_id);
119 } else {
120 DBF_EVENT(3, "%08x: Tape unassigned\n", device->cdev_id);
121 }
122 tape_free_request(request);
123 return rc;
124}
125
126
127
128
129int
130tape_std_display(struct tape_device *device, struct display_struct *disp)
131{
132 struct tape_request *request;
133 int rc;
134
135 request = tape_alloc_request(2, 17);
136 if (IS_ERR(request)) {
137 DBF_EVENT(3, "TAPE: load display failed\n");
138 return PTR_ERR(request);
139 }
140 request->op = TO_DIS;
141
142 *(unsigned char *) request->cpdata = disp->cntrl;
143 DBF_EVENT(5, "TAPE: display cntrl=%04x\n", disp->cntrl);
144 memcpy(((unsigned char *) request->cpdata) + 1, disp->message1, 8);
145 memcpy(((unsigned char *) request->cpdata) + 9, disp->message2, 8);
146 ASCEBC(((unsigned char*) request->cpdata) + 1, 16);
147
148 tape_ccw_cc(request->cpaddr, LOAD_DISPLAY, 17, request->cpdata);
149 tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
150
151 rc = tape_do_io_interruptible(device, request);
152 tape_free_request(request);
153 return rc;
154}
155
156
157
158
159int
160tape_std_read_block_id(struct tape_device *device, __u64 *id)
161{
162 struct tape_request *request;
163 int rc;
164
165 request = tape_alloc_request(3, 8);
166 if (IS_ERR(request))
167 return PTR_ERR(request);
168 request->op = TO_RBI;
169
170 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
171 tape_ccw_cc(request->cpaddr + 1, READ_BLOCK_ID, 8, request->cpdata);
172 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
173
174 rc = tape_do_io(device, request);
175 if (rc == 0)
176
177 *id = *(__u64 *) request->cpdata;
178 tape_free_request(request);
179 return rc;
180}
181
182int
183tape_std_terminate_write(struct tape_device *device)
184{
185 int rc;
186
187 if(device->required_tapemarks == 0)
188 return 0;
189
190 DBF_LH(5, "tape%d: terminate write %dxEOF\n", device->first_minor,
191 device->required_tapemarks);
192
193 rc = tape_mtop(device, MTWEOF, device->required_tapemarks);
194 if (rc)
195 return rc;
196
197 device->required_tapemarks = 0;
198 return tape_mtop(device, MTBSR, 1);
199}
200
201
202
203
204
205
206int
207tape_std_mtload(struct tape_device *device, int count)
208{
209 return wait_event_interruptible(device->state_change_wq,
210 (device->medium_state == MS_LOADED));
211}
212
213
214
215
216int
217tape_std_mtsetblk(struct tape_device *device, int count)
218{
219 struct idal_buffer *new;
220
221 DBF_LH(6, "tape_std_mtsetblk(%d)\n", count);
222 if (count <= 0) {
223
224
225
226
227
228 device->char_data.block_size = 0;
229 return 0;
230 }
231 if (device->char_data.idal_buf != NULL &&
232 device->char_data.idal_buf->size == count)
233
234 return 0;
235
236 if (count > MAX_BLOCKSIZE) {
237 DBF_EVENT(3, "Invalid block size (%d > %d) given.\n",
238 count, MAX_BLOCKSIZE);
239 return -EINVAL;
240 }
241
242
243 new = idal_buffer_alloc(count, 0);
244 if (IS_ERR(new))
245 return -ENOMEM;
246 if (device->char_data.idal_buf != NULL)
247 idal_buffer_free(device->char_data.idal_buf);
248 device->char_data.idal_buf = new;
249 device->char_data.block_size = count;
250
251 DBF_LH(6, "new blocksize is %d\n", device->char_data.block_size);
252
253 return 0;
254}
255
256
257
258
259int
260tape_std_mtreset(struct tape_device *device, int count)
261{
262 DBF_EVENT(6, "TCHAR:devreset:\n");
263 device->char_data.block_size = 0;
264 return 0;
265}
266
267
268
269
270
271int
272tape_std_mtfsf(struct tape_device *device, int mt_count)
273{
274 struct tape_request *request;
275 struct ccw1 *ccw;
276
277 request = tape_alloc_request(mt_count + 2, 0);
278 if (IS_ERR(request))
279 return PTR_ERR(request);
280 request->op = TO_FSF;
281
282 ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
283 device->modeset_byte);
284 ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count);
285 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
286
287
288 return tape_do_io_free(device, request);
289}
290
291
292
293
294
295int
296tape_std_mtfsr(struct tape_device *device, int mt_count)
297{
298 struct tape_request *request;
299 struct ccw1 *ccw;
300 int rc;
301
302 request = tape_alloc_request(mt_count + 2, 0);
303 if (IS_ERR(request))
304 return PTR_ERR(request);
305 request->op = TO_FSB;
306
307 ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
308 device->modeset_byte);
309 ccw = tape_ccw_repeat(ccw, FORSPACEBLOCK, mt_count);
310 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
311
312
313 rc = tape_do_io(device, request);
314 if (rc == 0 && request->rescnt > 0) {
315 DBF_LH(3, "FSR over tapemark\n");
316 rc = 1;
317 }
318 tape_free_request(request);
319
320 return rc;
321}
322
323
324
325
326
327int
328tape_std_mtbsr(struct tape_device *device, int mt_count)
329{
330 struct tape_request *request;
331 struct ccw1 *ccw;
332 int rc;
333
334 request = tape_alloc_request(mt_count + 2, 0);
335 if (IS_ERR(request))
336 return PTR_ERR(request);
337 request->op = TO_BSB;
338
339 ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
340 device->modeset_byte);
341 ccw = tape_ccw_repeat(ccw, BACKSPACEBLOCK, mt_count);
342 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
343
344
345 rc = tape_do_io(device, request);
346 if (rc == 0 && request->rescnt > 0) {
347 DBF_LH(3, "BSR over tapemark\n");
348 rc = 1;
349 }
350 tape_free_request(request);
351
352 return rc;
353}
354
355
356
357
358int
359tape_std_mtweof(struct tape_device *device, int mt_count)
360{
361 struct tape_request *request;
362 struct ccw1 *ccw;
363
364 request = tape_alloc_request(mt_count + 2, 0);
365 if (IS_ERR(request))
366 return PTR_ERR(request);
367 request->op = TO_WTM;
368
369 ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
370 device->modeset_byte);
371 ccw = tape_ccw_repeat(ccw, WRITETAPEMARK, mt_count);
372 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
373
374
375 return tape_do_io_free(device, request);
376}
377
378
379
380
381
382
383int
384tape_std_mtbsfm(struct tape_device *device, int mt_count)
385{
386 struct tape_request *request;
387 struct ccw1 *ccw;
388
389 request = tape_alloc_request(mt_count + 2, 0);
390 if (IS_ERR(request))
391 return PTR_ERR(request);
392 request->op = TO_BSF;
393
394 ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
395 device->modeset_byte);
396 ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count);
397 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
398
399
400 return tape_do_io_free(device, request);
401}
402
403
404
405
406
407int
408tape_std_mtbsf(struct tape_device *device, int mt_count)
409{
410 struct tape_request *request;
411 struct ccw1 *ccw;
412 int rc;
413
414 request = tape_alloc_request(mt_count + 2, 0);
415 if (IS_ERR(request))
416 return PTR_ERR(request);
417 request->op = TO_BSF;
418
419 ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
420 device->modeset_byte);
421 ccw = tape_ccw_repeat(ccw, BACKSPACEFILE, mt_count);
422 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
423
424 rc = tape_do_io_free(device, request);
425 if (rc == 0) {
426 rc = tape_mtop(device, MTFSR, 1);
427 if (rc > 0)
428 rc = 0;
429 }
430 return rc;
431}
432
433
434
435
436
437
438int
439tape_std_mtfsfm(struct tape_device *device, int mt_count)
440{
441 struct tape_request *request;
442 struct ccw1 *ccw;
443 int rc;
444
445 request = tape_alloc_request(mt_count + 2, 0);
446 if (IS_ERR(request))
447 return PTR_ERR(request);
448 request->op = TO_FSF;
449
450 ccw = tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
451 device->modeset_byte);
452 ccw = tape_ccw_repeat(ccw, FORSPACEFILE, mt_count);
453 ccw = tape_ccw_end(ccw, NOP, 0, NULL);
454
455 rc = tape_do_io_free(device, request);
456 if (rc == 0) {
457 rc = tape_mtop(device, MTBSR, 1);
458 if (rc > 0)
459 rc = 0;
460 }
461
462 return rc;
463}
464
465
466
467
468int
469tape_std_mtrew(struct tape_device *device, int mt_count)
470{
471 struct tape_request *request;
472
473 request = tape_alloc_request(3, 0);
474 if (IS_ERR(request))
475 return PTR_ERR(request);
476 request->op = TO_REW;
477
478 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1,
479 device->modeset_byte);
480 tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL);
481 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
482
483
484 return tape_do_io_free(device, request);
485}
486
487
488
489
490
491int
492tape_std_mtoffl(struct tape_device *device, int mt_count)
493{
494 struct tape_request *request;
495
496 request = tape_alloc_request(3, 0);
497 if (IS_ERR(request))
498 return PTR_ERR(request);
499 request->op = TO_RUN;
500
501 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
502 tape_ccw_cc(request->cpaddr + 1, REWIND_UNLOAD, 0, NULL);
503 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
504
505
506 return tape_do_io_free(device, request);
507}
508
509
510
511
512int
513tape_std_mtnop(struct tape_device *device, int mt_count)
514{
515 struct tape_request *request;
516
517 request = tape_alloc_request(2, 0);
518 if (IS_ERR(request))
519 return PTR_ERR(request);
520 request->op = TO_NOP;
521
522 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
523 tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
524
525 return tape_do_io_free(device, request);
526}
527
528
529
530
531
532
533int
534tape_std_mteom(struct tape_device *device, int mt_count)
535{
536 int rc;
537
538
539
540
541 if ((rc = tape_mtop(device, MTREW, 1)) < 0)
542 return rc;
543
544
545
546
547
548
549
550 do {
551 if ((rc = tape_mtop(device, MTFSF, 1)) < 0)
552 return rc;
553 if ((rc = tape_mtop(device, MTFSR, 1)) < 0)
554 return rc;
555 } while (rc == 0);
556
557 return tape_mtop(device, MTBSR, 1);
558}
559
560
561
562
563int
564tape_std_mtreten(struct tape_device *device, int mt_count)
565{
566 struct tape_request *request;
567
568 request = tape_alloc_request(4, 0);
569 if (IS_ERR(request))
570 return PTR_ERR(request);
571 request->op = TO_FSF;
572
573 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
574 tape_ccw_cc(request->cpaddr + 1,FORSPACEFILE, 0, NULL);
575 tape_ccw_cc(request->cpaddr + 2, NOP, 0, NULL);
576 tape_ccw_end(request->cpaddr + 3, CCW_CMD_TIC, 0, request->cpaddr);
577
578 tape_do_io_interruptible(device, request);
579 tape_free_request(request);
580 return tape_mtop(device, MTREW, 1);
581}
582
583
584
585
586int
587tape_std_mterase(struct tape_device *device, int mt_count)
588{
589 struct tape_request *request;
590
591 request = tape_alloc_request(6, 0);
592 if (IS_ERR(request))
593 return PTR_ERR(request);
594 request->op = TO_DSE;
595
596 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
597 tape_ccw_cc(request->cpaddr + 1, REWIND, 0, NULL);
598 tape_ccw_cc(request->cpaddr + 2, ERASE_GAP, 0, NULL);
599 tape_ccw_cc(request->cpaddr + 3, DATA_SEC_ERASE, 0, NULL);
600 tape_ccw_cc(request->cpaddr + 4, REWIND, 0, NULL);
601 tape_ccw_end(request->cpaddr + 5, NOP, 0, NULL);
602
603
604 return tape_do_io_free(device, request);
605}
606
607
608
609
610int
611tape_std_mtunload(struct tape_device *device, int mt_count)
612{
613 return tape_mtop(device, MTOFFL, mt_count);
614}
615
616
617
618
619
620int
621tape_std_mtcompression(struct tape_device *device, int mt_count)
622{
623 struct tape_request *request;
624
625 if (mt_count < 0 || mt_count > 1) {
626 DBF_EXCEPTION(6, "xcom parm\n");
627 return -EINVAL;
628 }
629 request = tape_alloc_request(2, 0);
630 if (IS_ERR(request))
631 return PTR_ERR(request);
632 request->op = TO_NOP;
633
634 if (mt_count == 0)
635 *device->modeset_byte &= ~0x08;
636 else
637 *device->modeset_byte |= 0x08;
638 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
639 tape_ccw_end(request->cpaddr + 1, NOP, 0, NULL);
640
641 return tape_do_io_free(device, request);
642}
643
644
645
646
647struct tape_request *
648tape_std_read_block(struct tape_device *device, size_t count)
649{
650 struct tape_request *request;
651
652
653
654
655
656 request = tape_alloc_request(4, 0);
657 if (IS_ERR(request)) {
658 DBF_EXCEPTION(6, "xrbl fail");
659 return request;
660 }
661 request->op = TO_RFO;
662 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
663 tape_ccw_end_idal(request->cpaddr + 1, READ_FORWARD,
664 device->char_data.idal_buf);
665 DBF_EVENT(6, "xrbl ccwg\n");
666 return request;
667}
668
669
670
671
672void
673tape_std_read_backward(struct tape_device *device, struct tape_request *request)
674{
675
676
677
678
679
680 request->op = TO_RBA;
681 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
682 tape_ccw_cc_idal(request->cpaddr + 1, READ_BACKWARD,
683 device->char_data.idal_buf);
684 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
685 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
686 DBF_EVENT(6, "xrop ccwg");}
687
688
689
690
691struct tape_request *
692tape_std_write_block(struct tape_device *device, size_t count)
693{
694 struct tape_request *request;
695
696 request = tape_alloc_request(2, 0);
697 if (IS_ERR(request)) {
698 DBF_EXCEPTION(6, "xwbl fail\n");
699 return request;
700 }
701 request->op = TO_WRI;
702 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
703 tape_ccw_end_idal(request->cpaddr + 1, WRITE_CMD,
704 device->char_data.idal_buf);
705 DBF_EVENT(6, "xwbl ccwg\n");
706 return request;
707}
708
709
710
711
712void
713tape_std_process_eov(struct tape_device *device)
714{
715
716
717
718
719 if (tape_mtop(device, MTBSR, 1) == 0 &&
720 tape_mtop(device, MTWEOF, 1) == 0) {
721 tape_mtop(device, MTBSR, 1);
722 }
723}
724
725EXPORT_SYMBOL(tape_std_assign);
726EXPORT_SYMBOL(tape_std_unassign);
727EXPORT_SYMBOL(tape_std_display);
728EXPORT_SYMBOL(tape_std_read_block_id);
729EXPORT_SYMBOL(tape_std_mtload);
730EXPORT_SYMBOL(tape_std_mtsetblk);
731EXPORT_SYMBOL(tape_std_mtreset);
732EXPORT_SYMBOL(tape_std_mtfsf);
733EXPORT_SYMBOL(tape_std_mtfsr);
734EXPORT_SYMBOL(tape_std_mtbsr);
735EXPORT_SYMBOL(tape_std_mtweof);
736EXPORT_SYMBOL(tape_std_mtbsfm);
737EXPORT_SYMBOL(tape_std_mtbsf);
738EXPORT_SYMBOL(tape_std_mtfsfm);
739EXPORT_SYMBOL(tape_std_mtrew);
740EXPORT_SYMBOL(tape_std_mtoffl);
741EXPORT_SYMBOL(tape_std_mtnop);
742EXPORT_SYMBOL(tape_std_mteom);
743EXPORT_SYMBOL(tape_std_mtreten);
744EXPORT_SYMBOL(tape_std_mterase);
745EXPORT_SYMBOL(tape_std_mtunload);
746EXPORT_SYMBOL(tape_std_mtcompression);
747EXPORT_SYMBOL(tape_std_read_block);
748EXPORT_SYMBOL(tape_std_read_backward);
749EXPORT_SYMBOL(tape_std_write_block);
750EXPORT_SYMBOL(tape_std_process_eov);
751