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Merge remote-tracking branch 'omap_dss2/for-next'
[deliverable/linux.git] / drivers / s390 / char / tape_3590.c
1 /*
2 * tape device discipline for 3590 tapes.
3 *
4 * Copyright IBM Corp. 2001, 2009
5 * Author(s): Stefan Bader <shbader@de.ibm.com>
6 * Michael Holzheu <holzheu@de.ibm.com>
7 * Martin Schwidefsky <schwidefsky@de.ibm.com>
8 */
9
10 #define KMSG_COMPONENT "tape_3590"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/module.h>
14 #include <linux/slab.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 static struct workqueue_struct *tape_3590_wq;
27
28 /*
29 * Pointer to debug area.
30 */
31 debug_info_t *TAPE_DBF_AREA = NULL;
32 EXPORT_SYMBOL(TAPE_DBF_AREA);
33
34 /*******************************************************************
35 * Error Recovery functions:
36 * - Read Opposite: implemented
37 * - Read Device (buffered) log: BRA
38 * - Read Library log: BRA
39 * - Swap Devices: BRA
40 * - Long Busy: implemented
41 * - Special Intercept: BRA
42 * - Read Alternate: implemented
43 *******************************************************************/
44
45 static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = {
46 [0x00] = "",
47 [0x10] = "Lost Sense",
48 [0x11] = "Assigned Elsewhere",
49 [0x12] = "Allegiance Reset",
50 [0x13] = "Shared Access Violation",
51 [0x20] = "Command Reject",
52 [0x21] = "Configuration Error",
53 [0x22] = "Protection Exception",
54 [0x23] = "Write Protect",
55 [0x24] = "Write Length",
56 [0x25] = "Read-Only Format",
57 [0x31] = "Beginning of Partition",
58 [0x33] = "End of Partition",
59 [0x34] = "End of Data",
60 [0x35] = "Block not found",
61 [0x40] = "Device Intervention",
62 [0x41] = "Loader Intervention",
63 [0x42] = "Library Intervention",
64 [0x50] = "Write Error",
65 [0x51] = "Erase Error",
66 [0x52] = "Formatting Error",
67 [0x53] = "Read Error",
68 [0x54] = "Unsupported Format",
69 [0x55] = "No Formatting",
70 [0x56] = "Positioning lost",
71 [0x57] = "Read Length",
72 [0x60] = "Unsupported Medium",
73 [0x61] = "Medium Length Error",
74 [0x62] = "Medium removed",
75 [0x64] = "Load Check",
76 [0x65] = "Unload Check",
77 [0x70] = "Equipment Check",
78 [0x71] = "Bus out Check",
79 [0x72] = "Protocol Error",
80 [0x73] = "Interface Error",
81 [0x74] = "Overrun",
82 [0x75] = "Halt Signal",
83 [0x90] = "Device fenced",
84 [0x91] = "Device Path fenced",
85 [0xa0] = "Volume misplaced",
86 [0xa1] = "Volume inaccessible",
87 [0xa2] = "Volume in input",
88 [0xa3] = "Volume ejected",
89 [0xa4] = "All categories reserved",
90 [0xa5] = "Duplicate Volume",
91 [0xa6] = "Library Manager Offline",
92 [0xa7] = "Library Output Station full",
93 [0xa8] = "Vision System non-operational",
94 [0xa9] = "Library Manager Equipment Check",
95 [0xaa] = "Library Equipment Check",
96 [0xab] = "All Library Cells full",
97 [0xac] = "No Cleaner Volumes in Library",
98 [0xad] = "I/O Station door open",
99 [0xae] = "Subsystem environmental alert",
100 };
101
102 static int crypt_supported(struct tape_device *device)
103 {
104 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device));
105 }
106
107 static int crypt_enabled(struct tape_device *device)
108 {
109 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device));
110 }
111
112 static void ext_to_int_kekl(struct tape390_kekl *in,
113 struct tape3592_kekl *out)
114 {
115 int i;
116
117 memset(out, 0, sizeof(*out));
118 if (in->type == TAPE390_KEKL_TYPE_HASH)
119 out->flags |= 0x40;
120 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH)
121 out->flags |= 0x80;
122 strncpy(out->label, in->label, 64);
123 for (i = strlen(in->label); i < sizeof(out->label); i++)
124 out->label[i] = ' ';
125 ASCEBC(out->label, sizeof(out->label));
126 }
127
128 static void int_to_ext_kekl(struct tape3592_kekl *in,
129 struct tape390_kekl *out)
130 {
131 memset(out, 0, sizeof(*out));
132 if(in->flags & 0x40)
133 out->type = TAPE390_KEKL_TYPE_HASH;
134 else
135 out->type = TAPE390_KEKL_TYPE_LABEL;
136 if(in->flags & 0x80)
137 out->type_on_tape = TAPE390_KEKL_TYPE_HASH;
138 else
139 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL;
140 memcpy(out->label, in->label, sizeof(in->label));
141 EBCASC(out->label, sizeof(in->label));
142 strim(out->label);
143 }
144
145 static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in,
146 struct tape390_kekl_pair *out)
147 {
148 if (in->count == 0) {
149 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE;
150 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE;
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 == 1) {
154 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
155 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;
156 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;
157 } else if (in->count == 2) {
158 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);
159 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]);
160 } else {
161 printk("Invalid KEKL number: %d\n", in->count);
162 BUG();
163 }
164 }
165
166 static int check_ext_kekl(struct tape390_kekl *kekl)
167 {
168 if (kekl->type == TAPE390_KEKL_TYPE_NONE)
169 goto invalid;
170 if (kekl->type > TAPE390_KEKL_TYPE_HASH)
171 goto invalid;
172 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE)
173 goto invalid;
174 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH)
175 goto invalid;
176 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) &&
177 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL))
178 goto invalid;
179
180 return 0;
181 invalid:
182 return -EINVAL;
183 }
184
185 static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls)
186 {
187 if (check_ext_kekl(&kekls->kekl[0]))
188 goto invalid;
189 if (check_ext_kekl(&kekls->kekl[1]))
190 goto invalid;
191
192 return 0;
193 invalid:
194 return -EINVAL;
195 }
196
197 /*
198 * Query KEKLs
199 */
200 static int tape_3592_kekl_query(struct tape_device *device,
201 struct tape390_kekl_pair *ext_kekls)
202 {
203 struct tape_request *request;
204 struct tape3592_kekl_query_order *order;
205 struct tape3592_kekl_query_data *int_kekls;
206 int rc;
207
208 DBF_EVENT(6, "tape3592_kekl_query\n");
209 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA);
210 if (!int_kekls)
211 return -ENOMEM;
212 request = tape_alloc_request(2, sizeof(*order));
213 if (IS_ERR(request)) {
214 rc = PTR_ERR(request);
215 goto fail_malloc;
216 }
217 order = request->cpdata;
218 memset(order,0,sizeof(*order));
219 order->code = 0xe2;
220 order->max_count = 2;
221 request->op = TO_KEKL_QUERY;
222 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
223 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls),
224 int_kekls);
225 rc = tape_do_io(device, request);
226 if (rc)
227 goto fail_request;
228 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls);
229
230 rc = 0;
231 fail_request:
232 tape_free_request(request);
233 fail_malloc:
234 kfree(int_kekls);
235 return rc;
236 }
237
238 /*
239 * IOCTL: Query KEKLs
240 */
241 static int tape_3592_ioctl_kekl_query(struct tape_device *device,
242 unsigned long arg)
243 {
244 int rc;
245 struct tape390_kekl_pair *ext_kekls;
246
247 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n");
248 if (!crypt_supported(device))
249 return -ENOSYS;
250 if (!crypt_enabled(device))
251 return -EUNATCH;
252 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL);
253 if (!ext_kekls)
254 return -ENOMEM;
255 rc = tape_3592_kekl_query(device, ext_kekls);
256 if (rc != 0)
257 goto fail;
258 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) {
259 rc = -EFAULT;
260 goto fail;
261 }
262 rc = 0;
263 fail:
264 kfree(ext_kekls);
265 return rc;
266 }
267
268 static int tape_3590_mttell(struct tape_device *device, int mt_count);
269
270 /*
271 * Set KEKLs
272 */
273 static int tape_3592_kekl_set(struct tape_device *device,
274 struct tape390_kekl_pair *ext_kekls)
275 {
276 struct tape_request *request;
277 struct tape3592_kekl_set_order *order;
278
279 DBF_EVENT(6, "tape3592_kekl_set\n");
280 if (check_ext_kekl_pair(ext_kekls)) {
281 DBF_EVENT(6, "invalid kekls\n");
282 return -EINVAL;
283 }
284 if (tape_3590_mttell(device, 0) != 0)
285 return -EBADSLT;
286 request = tape_alloc_request(1, sizeof(*order));
287 if (IS_ERR(request))
288 return PTR_ERR(request);
289 order = request->cpdata;
290 memset(order, 0, sizeof(*order));
291 order->code = 0xe3;
292 order->kekls.count = 2;
293 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]);
294 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]);
295 request->op = TO_KEKL_SET;
296 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);
297
298 return tape_do_io_free(device, request);
299 }
300
301 /*
302 * IOCTL: Set KEKLs
303 */
304 static int tape_3592_ioctl_kekl_set(struct tape_device *device,
305 unsigned long arg)
306 {
307 int rc;
308 struct tape390_kekl_pair *ext_kekls;
309
310 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n");
311 if (!crypt_supported(device))
312 return -ENOSYS;
313 if (!crypt_enabled(device))
314 return -EUNATCH;
315 ext_kekls = memdup_user((char __user *)arg, sizeof(*ext_kekls));
316 if (IS_ERR(ext_kekls))
317 return PTR_ERR(ext_kekls);
318 rc = tape_3592_kekl_set(device, ext_kekls);
319 kfree(ext_kekls);
320 return rc;
321 }
322
323 /*
324 * Enable encryption
325 */
326 static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device)
327 {
328 struct tape_request *request;
329 char *data;
330
331 DBF_EVENT(6, "tape_3592_enable_crypt\n");
332 if (!crypt_supported(device))
333 return ERR_PTR(-ENOSYS);
334 request = tape_alloc_request(2, 72);
335 if (IS_ERR(request))
336 return request;
337 data = request->cpdata;
338 memset(data,0,72);
339
340 data[0] = 0x05;
341 data[36 + 0] = 0x03;
342 data[36 + 1] = 0x03;
343 data[36 + 4] = 0x40;
344 data[36 + 6] = 0x01;
345 data[36 + 14] = 0x2f;
346 data[36 + 18] = 0xc3;
347 data[36 + 35] = 0x72;
348 request->op = TO_CRYPT_ON;
349 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
350 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
351 return request;
352 }
353
354 static int tape_3592_enable_crypt(struct tape_device *device)
355 {
356 struct tape_request *request;
357
358 request = __tape_3592_enable_crypt(device);
359 if (IS_ERR(request))
360 return PTR_ERR(request);
361 return tape_do_io_free(device, request);
362 }
363
364 static void tape_3592_enable_crypt_async(struct tape_device *device)
365 {
366 struct tape_request *request;
367
368 request = __tape_3592_enable_crypt(device);
369 if (!IS_ERR(request))
370 tape_do_io_async_free(device, request);
371 }
372
373 /*
374 * Disable encryption
375 */
376 static struct tape_request *__tape_3592_disable_crypt(struct tape_device *device)
377 {
378 struct tape_request *request;
379 char *data;
380
381 DBF_EVENT(6, "tape_3592_disable_crypt\n");
382 if (!crypt_supported(device))
383 return ERR_PTR(-ENOSYS);
384 request = tape_alloc_request(2, 72);
385 if (IS_ERR(request))
386 return request;
387 data = request->cpdata;
388 memset(data,0,72);
389
390 data[0] = 0x05;
391 data[36 + 0] = 0x03;
392 data[36 + 1] = 0x03;
393 data[36 + 35] = 0x32;
394
395 request->op = TO_CRYPT_OFF;
396 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);
397 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);
398
399 return request;
400 }
401
402 static int tape_3592_disable_crypt(struct tape_device *device)
403 {
404 struct tape_request *request;
405
406 request = __tape_3592_disable_crypt(device);
407 if (IS_ERR(request))
408 return PTR_ERR(request);
409 return tape_do_io_free(device, request);
410 }
411
412 static void tape_3592_disable_crypt_async(struct tape_device *device)
413 {
414 struct tape_request *request;
415
416 request = __tape_3592_disable_crypt(device);
417 if (!IS_ERR(request))
418 tape_do_io_async_free(device, request);
419 }
420
421 /*
422 * IOCTL: Set encryption status
423 */
424 static int tape_3592_ioctl_crypt_set(struct tape_device *device,
425 unsigned long arg)
426 {
427 struct tape390_crypt_info info;
428
429 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n");
430 if (!crypt_supported(device))
431 return -ENOSYS;
432 if (copy_from_user(&info, (char __user *)arg, sizeof(info)))
433 return -EFAULT;
434 if (info.status & ~TAPE390_CRYPT_ON_MASK)
435 return -EINVAL;
436 if (info.status & TAPE390_CRYPT_ON_MASK)
437 return tape_3592_enable_crypt(device);
438 else
439 return tape_3592_disable_crypt(device);
440 }
441
442 static int tape_3590_sense_medium(struct tape_device *device);
443
444 /*
445 * IOCTL: Query enryption status
446 */
447 static int tape_3592_ioctl_crypt_query(struct tape_device *device,
448 unsigned long arg)
449 {
450 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n");
451 if (!crypt_supported(device))
452 return -ENOSYS;
453 tape_3590_sense_medium(device);
454 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device),
455 sizeof(TAPE_3590_CRYPT_INFO(device))))
456 return -EFAULT;
457 else
458 return 0;
459 }
460
461 /*
462 * 3590 IOCTL Overload
463 */
464 static int
465 tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)
466 {
467 switch (cmd) {
468 case TAPE390_DISPLAY: {
469 struct display_struct disp;
470
471 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)))
472 return -EFAULT;
473
474 return tape_std_display(device, &disp);
475 }
476 case TAPE390_KEKL_SET:
477 return tape_3592_ioctl_kekl_set(device, arg);
478 case TAPE390_KEKL_QUERY:
479 return tape_3592_ioctl_kekl_query(device, arg);
480 case TAPE390_CRYPT_SET:
481 return tape_3592_ioctl_crypt_set(device, arg);
482 case TAPE390_CRYPT_QUERY:
483 return tape_3592_ioctl_crypt_query(device, arg);
484 default:
485 return -EINVAL; /* no additional ioctls */
486 }
487 }
488
489 /*
490 * SENSE Medium: Get Sense data about medium state
491 */
492 static int tape_3590_sense_medium(struct tape_device *device)
493 {
494 struct tape_request *request;
495
496 request = tape_alloc_request(1, 128);
497 if (IS_ERR(request))
498 return PTR_ERR(request);
499 request->op = TO_MSEN;
500 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
501 return tape_do_io_free(device, request);
502 }
503
504 static void tape_3590_sense_medium_async(struct tape_device *device)
505 {
506 struct tape_request *request;
507
508 request = tape_alloc_request(1, 128);
509 if (IS_ERR(request))
510 return;
511 request->op = TO_MSEN;
512 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);
513 tape_do_io_async_free(device, request);
514 }
515
516 /*
517 * MTTELL: Tell block. Return the number of block relative to current file.
518 */
519 static int
520 tape_3590_mttell(struct tape_device *device, int mt_count)
521 {
522 __u64 block_id;
523 int rc;
524
525 rc = tape_std_read_block_id(device, &block_id);
526 if (rc)
527 return rc;
528 return block_id >> 32;
529 }
530
531 /*
532 * MTSEEK: seek to the specified block.
533 */
534 static int
535 tape_3590_mtseek(struct tape_device *device, int count)
536 {
537 struct tape_request *request;
538
539 DBF_EVENT(6, "xsee id: %x\n", count);
540 request = tape_alloc_request(3, 4);
541 if (IS_ERR(request))
542 return PTR_ERR(request);
543 request->op = TO_LBL;
544 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
545 *(__u32 *) request->cpdata = count;
546 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
547 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
548 return tape_do_io_free(device, request);
549 }
550
551 /*
552 * Read Opposite Error Recovery Function:
553 * Used, when Read Forward does not work
554 */
555 static void
556 tape_3590_read_opposite(struct tape_device *device,
557 struct tape_request *request)
558 {
559 struct tape_3590_disc_data *data;
560
561 /*
562 * We have allocated 4 ccws in tape_std_read, so we can now
563 * transform the request to a read backward, followed by a
564 * forward space block.
565 */
566 request->op = TO_RBA;
567 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);
568 data = device->discdata;
569 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,
570 device->char_data.idal_buf);
571 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);
572 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);
573 DBF_EVENT(6, "xrop ccwg\n");
574 }
575
576 /*
577 * Read Attention Msg
578 * This should be done after an interrupt with attention bit (0x80)
579 * in device state.
580 *
581 * After a "read attention message" request there are two possible
582 * results:
583 *
584 * 1. A unit check is presented, when attention sense is present (e.g. when
585 * a medium has been unloaded). The attention sense comes then
586 * together with the unit check. The recovery action is either "retry"
587 * (in case there is an attention message pending) or "permanent error".
588 *
589 * 2. The attention msg is written to the "read subsystem data" buffer.
590 * In this case we probably should print it to the console.
591 */
592 static void tape_3590_read_attmsg_async(struct tape_device *device)
593 {
594 struct tape_request *request;
595 char *buf;
596
597 request = tape_alloc_request(3, 4096);
598 if (IS_ERR(request))
599 return;
600 request->op = TO_READ_ATTMSG;
601 buf = request->cpdata;
602 buf[0] = PREP_RD_SS_DATA;
603 buf[6] = RD_ATTMSG; /* read att msg */
604 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf);
605 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12);
606 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);
607 tape_do_io_async_free(device, request);
608 }
609
610 /*
611 * These functions are used to schedule follow-up actions from within an
612 * interrupt context (like unsolicited interrupts).
613 * Note: the work handler is called by the system work queue. The tape
614 * commands started by the handler need to be asynchrounous, otherwise
615 * a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq).
616 */
617 struct work_handler_data {
618 struct tape_device *device;
619 enum tape_op op;
620 struct work_struct work;
621 };
622
623 static void
624 tape_3590_work_handler(struct work_struct *work)
625 {
626 struct work_handler_data *p =
627 container_of(work, struct work_handler_data, work);
628
629 switch (p->op) {
630 case TO_MSEN:
631 tape_3590_sense_medium_async(p->device);
632 break;
633 case TO_READ_ATTMSG:
634 tape_3590_read_attmsg_async(p->device);
635 break;
636 case TO_CRYPT_ON:
637 tape_3592_enable_crypt_async(p->device);
638 break;
639 case TO_CRYPT_OFF:
640 tape_3592_disable_crypt_async(p->device);
641 break;
642 default:
643 DBF_EVENT(3, "T3590: work handler undefined for "
644 "operation 0x%02x\n", p->op);
645 }
646 tape_put_device(p->device);
647 kfree(p);
648 }
649
650 static int
651 tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
652 {
653 struct work_handler_data *p;
654
655 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
656 return -ENOMEM;
657
658 INIT_WORK(&p->work, tape_3590_work_handler);
659
660 p->device = tape_get_device(device);
661 p->op = op;
662
663 queue_work(tape_3590_wq, &p->work);
664 return 0;
665 }
666
667 static void tape_3590_med_state_set(struct tape_device *device,
668 struct tape_3590_med_sense *sense)
669 {
670 struct tape390_crypt_info *c_info;
671
672 c_info = &TAPE_3590_CRYPT_INFO(device);
673
674 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst);
675 switch (sense->macst) {
676 case 0x04:
677 case 0x05:
678 case 0x06:
679 tape_med_state_set(device, MS_UNLOADED);
680 TAPE_3590_CRYPT_INFO(device).medium_status = 0;
681 return;
682 case 0x08:
683 case 0x09:
684 tape_med_state_set(device, MS_LOADED);
685 break;
686 default:
687 tape_med_state_set(device, MS_UNKNOWN);
688 return;
689 }
690 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK;
691 if (sense->flags & MSENSE_CRYPT_MASK) {
692 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags);
693 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK;
694 } else {
695 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags);
696 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK;
697 }
698 }
699
700 /*
701 * The done handler is called at device/channel end and wakes up the sleeping
702 * process
703 */
704 static int
705 tape_3590_done(struct tape_device *device, struct tape_request *request)
706 {
707
708 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);
709
710 switch (request->op) {
711 case TO_BSB:
712 case TO_BSF:
713 case TO_DSE:
714 case TO_FSB:
715 case TO_FSF:
716 case TO_LBL:
717 case TO_RFO:
718 case TO_RBA:
719 case TO_REW:
720 case TO_WRI:
721 case TO_WTM:
722 case TO_BLOCK:
723 case TO_LOAD:
724 tape_med_state_set(device, MS_LOADED);
725 break;
726 case TO_RUN:
727 tape_med_state_set(device, MS_UNLOADED);
728 tape_3590_schedule_work(device, TO_CRYPT_OFF);
729 break;
730 case TO_MSEN:
731 tape_3590_med_state_set(device, request->cpdata);
732 break;
733 case TO_CRYPT_ON:
734 TAPE_3590_CRYPT_INFO(device).status
735 |= TAPE390_CRYPT_ON_MASK;
736 *(device->modeset_byte) |= 0x03;
737 break;
738 case TO_CRYPT_OFF:
739 TAPE_3590_CRYPT_INFO(device).status
740 &= ~TAPE390_CRYPT_ON_MASK;
741 *(device->modeset_byte) &= ~0x03;
742 break;
743 case TO_RBI: /* RBI seems to succeed even without medium loaded. */
744 case TO_NOP: /* Same to NOP. */
745 case TO_READ_CONFIG:
746 case TO_READ_ATTMSG:
747 case TO_DIS:
748 case TO_ASSIGN:
749 case TO_UNASSIGN:
750 case TO_SIZE:
751 case TO_KEKL_SET:
752 case TO_KEKL_QUERY:
753 case TO_RDC:
754 break;
755 }
756 return TAPE_IO_SUCCESS;
757 }
758
759 /*
760 * This function is called, when error recovery was successful
761 */
762 static inline int
763 tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request)
764 {
765 DBF_EVENT(3, "Error Recovery successful for %s\n",
766 tape_op_verbose[request->op]);
767 return tape_3590_done(device, request);
768 }
769
770 /*
771 * This function is called, when error recovery was not successful
772 */
773 static inline int
774 tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,
775 struct irb *irb, int rc)
776 {
777 DBF_EVENT(3, "Error Recovery failed for %s\n",
778 tape_op_verbose[request->op]);
779 tape_dump_sense_dbf(device, request, irb);
780 return rc;
781 }
782
783 /*
784 * Error Recovery do retry
785 */
786 static inline int
787 tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
788 struct irb *irb)
789 {
790 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
791 tape_dump_sense_dbf(device, request, irb);
792 return TAPE_IO_RETRY;
793 }
794
795 /*
796 * Handle unsolicited interrupts
797 */
798 static int
799 tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
800 {
801 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END)
802 /* Probably result of halt ssch */
803 return TAPE_IO_PENDING;
804 else if (irb->scsw.cmd.dstat == 0x85)
805 /* Device Ready */
806 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id);
807 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
808 tape_3590_schedule_work(device, TO_READ_ATTMSG);
809 } else {
810 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
811 tape_dump_sense_dbf(device, NULL, irb);
812 }
813 /* check medium state */
814 tape_3590_schedule_work(device, TO_MSEN);
815 return TAPE_IO_SUCCESS;
816 }
817
818 /*
819 * Basic Recovery routine
820 */
821 static int
822 tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
823 struct irb *irb, int rc)
824 {
825 struct tape_3590_sense *sense;
826
827 sense = (struct tape_3590_sense *) irb->ecw;
828
829 switch (sense->bra) {
830 case SENSE_BRA_PER:
831 return tape_3590_erp_failed(device, request, irb, rc);
832 case SENSE_BRA_CONT:
833 return tape_3590_erp_succeded(device, request);
834 case SENSE_BRA_RE:
835 return tape_3590_erp_retry(device, request, irb);
836 case SENSE_BRA_DRE:
837 return tape_3590_erp_failed(device, request, irb, rc);
838 default:
839 BUG();
840 return TAPE_IO_STOP;
841 }
842 }
843
844 /*
845 * RDL: Read Device (buffered) log
846 */
847 static int
848 tape_3590_erp_read_buf_log(struct tape_device *device,
849 struct tape_request *request, struct irb *irb)
850 {
851 /*
852 * We just do the basic error recovery at the moment (retry).
853 * Perhaps in the future, we read the log and dump it somewhere...
854 */
855 return tape_3590_erp_basic(device, request, irb, -EIO);
856 }
857
858 /*
859 * SWAP: Swap Devices
860 */
861 static int
862 tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
863 struct irb *irb)
864 {
865 /*
866 * This error recovery should swap the tapes
867 * if the original has a problem. The operation
868 * should proceed with the new tape... this
869 * should probably be done in user space!
870 */
871 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a "
872 "different tape unit\n");
873 return tape_3590_erp_basic(device, request, irb, -EIO);
874 }
875
876 /*
877 * LBY: Long Busy
878 */
879 static int
880 tape_3590_erp_long_busy(struct tape_device *device,
881 struct tape_request *request, struct irb *irb)
882 {
883 DBF_EVENT(6, "Device is busy\n");
884 return TAPE_IO_LONG_BUSY;
885 }
886
887 /*
888 * SPI: Special Intercept
889 */
890 static int
891 tape_3590_erp_special_interrupt(struct tape_device *device,
892 struct tape_request *request, struct irb *irb)
893 {
894 return tape_3590_erp_basic(device, request, irb, -EIO);
895 }
896
897 /*
898 * RDA: Read Alternate
899 */
900 static int
901 tape_3590_erp_read_alternate(struct tape_device *device,
902 struct tape_request *request, struct irb *irb)
903 {
904 struct tape_3590_disc_data *data;
905
906 /*
907 * The issued Read Backward or Read Previous command is not
908 * supported by the device
909 * The recovery action should be to issue another command:
910 * Read Revious: if Read Backward is not supported
911 * Read Backward: if Read Previous is not supported
912 */
913 data = device->discdata;
914 if (data->read_back_op == READ_PREVIOUS) {
915 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
916 device->cdev_id);
917 data->read_back_op = READ_BACKWARD;
918 } else {
919 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
920 device->cdev_id);
921 data->read_back_op = READ_PREVIOUS;
922 }
923 tape_3590_read_opposite(device, request);
924 return tape_3590_erp_retry(device, request, irb);
925 }
926
927 /*
928 * Error Recovery read opposite
929 */
930 static int
931 tape_3590_erp_read_opposite(struct tape_device *device,
932 struct tape_request *request, struct irb *irb)
933 {
934 switch (request->op) {
935 case TO_RFO:
936 /*
937 * We did read forward, but the data could not be read.
938 * We will read backward and then skip forward again.
939 */
940 tape_3590_read_opposite(device, request);
941 return tape_3590_erp_retry(device, request, irb);
942 case TO_RBA:
943 /* We tried to read forward and backward, but hat no success */
944 return tape_3590_erp_failed(device, request, irb, -EIO);
945 break;
946 default:
947 return tape_3590_erp_failed(device, request, irb, -EIO);
948 }
949 }
950
951 /*
952 * Print an MIM (Media Information Message) (message code f0)
953 */
954 static void
955 tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
956 {
957 struct tape_3590_sense *sense;
958 char *exception, *service;
959
960 exception = kmalloc(BUFSIZE, GFP_ATOMIC);
961 service = kmalloc(BUFSIZE, GFP_ATOMIC);
962
963 if (!exception || !service)
964 goto out_nomem;
965
966 sense = (struct tape_3590_sense *) irb->ecw;
967 /* Exception Message */
968 switch (sense->fmt.f70.emc) {
969 case 0x02:
970 snprintf(exception, BUFSIZE, "Data degraded");
971 break;
972 case 0x03:
973 snprintf(exception, BUFSIZE, "Data degraded in partion %i",
974 sense->fmt.f70.mp);
975 break;
976 case 0x04:
977 snprintf(exception, BUFSIZE, "Medium degraded");
978 break;
979 case 0x05:
980 snprintf(exception, BUFSIZE, "Medium degraded in partition %i",
981 sense->fmt.f70.mp);
982 break;
983 case 0x06:
984 snprintf(exception, BUFSIZE, "Block 0 Error");
985 break;
986 case 0x07:
987 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x",
988 sense->fmt.f70.md);
989 break;
990 default:
991 snprintf(exception, BUFSIZE, "0x%02x",
992 sense->fmt.f70.emc);
993 break;
994 }
995 /* Service Message */
996 switch (sense->fmt.f70.smc) {
997 case 0x02:
998 snprintf(service, BUFSIZE, "Reference Media maintenance "
999 "procedure %i", sense->fmt.f70.md);
1000 break;
1001 default:
1002 snprintf(service, BUFSIZE, "0x%02x",
1003 sense->fmt.f70.smc);
1004 break;
1005 }
1006
1007 dev_warn (&device->cdev->dev, "Tape media information: exception %s, "
1008 "service %s\n", exception, service);
1009
1010 out_nomem:
1011 kfree(exception);
1012 kfree(service);
1013 }
1014
1015 /*
1016 * Print an I/O Subsystem Service Information Message (message code f1)
1017 */
1018 static void
1019 tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
1020 {
1021 struct tape_3590_sense *sense;
1022 char *exception, *service;
1023
1024 exception = kmalloc(BUFSIZE, GFP_ATOMIC);
1025 service = kmalloc(BUFSIZE, GFP_ATOMIC);
1026
1027 if (!exception || !service)
1028 goto out_nomem;
1029
1030 sense = (struct tape_3590_sense *) irb->ecw;
1031 /* Exception Message */
1032 switch (sense->fmt.f71.emc) {
1033 case 0x01:
1034 snprintf(exception, BUFSIZE, "Effect of failure is unknown");
1035 break;
1036 case 0x02:
1037 snprintf(exception, BUFSIZE, "CU Exception - no performance "
1038 "impact");
1039 break;
1040 case 0x03:
1041 snprintf(exception, BUFSIZE, "CU Exception on channel "
1042 "interface 0x%02x", sense->fmt.f71.md[0]);
1043 break;
1044 case 0x04:
1045 snprintf(exception, BUFSIZE, "CU Exception on device path "
1046 "0x%02x", sense->fmt.f71.md[0]);
1047 break;
1048 case 0x05:
1049 snprintf(exception, BUFSIZE, "CU Exception on library path "
1050 "0x%02x", sense->fmt.f71.md[0]);
1051 break;
1052 case 0x06:
1053 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x",
1054 sense->fmt.f71.md[0]);
1055 break;
1056 case 0x07:
1057 snprintf(exception, BUFSIZE, "CU Exception on partition "
1058 "0x%02x", sense->fmt.f71.md[0]);
1059 break;
1060 default:
1061 snprintf(exception, BUFSIZE, "0x%02x",
1062 sense->fmt.f71.emc);
1063 }
1064 /* Service Message */
1065 switch (sense->fmt.f71.smc) {
1066 case 0x01:
1067 snprintf(service, BUFSIZE, "Repair impact is unknown");
1068 break;
1069 case 0x02:
1070 snprintf(service, BUFSIZE, "Repair will not impact cu "
1071 "performance");
1072 break;
1073 case 0x03:
1074 if (sense->fmt.f71.mdf == 0)
1075 snprintf(service, BUFSIZE, "Repair will disable node "
1076 "0x%x on CU", sense->fmt.f71.md[1]);
1077 else
1078 snprintf(service, BUFSIZE, "Repair will disable "
1079 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1],
1080 sense->fmt.f71.md[2]);
1081 break;
1082 case 0x04:
1083 if (sense->fmt.f71.mdf == 0)
1084 snprintf(service, BUFSIZE, "Repair will disable "
1085 "channel path 0x%x on CU",
1086 sense->fmt.f71.md[1]);
1087 else
1088 snprintf(service, BUFSIZE, "Repair will disable channel"
1089 " paths (0x%x-0x%x) on CU",
1090 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1091 break;
1092 case 0x05:
1093 if (sense->fmt.f71.mdf == 0)
1094 snprintf(service, BUFSIZE, "Repair will disable device"
1095 " path 0x%x on CU", sense->fmt.f71.md[1]);
1096 else
1097 snprintf(service, BUFSIZE, "Repair will disable device"
1098 " paths (0x%x-0x%x) on CU",
1099 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1100 break;
1101 case 0x06:
1102 if (sense->fmt.f71.mdf == 0)
1103 snprintf(service, BUFSIZE, "Repair will disable "
1104 "library path 0x%x on CU",
1105 sense->fmt.f71.md[1]);
1106 else
1107 snprintf(service, BUFSIZE, "Repair will disable "
1108 "library paths (0x%x-0x%x) on CU",
1109 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1110 break;
1111 case 0x07:
1112 snprintf(service, BUFSIZE, "Repair will disable access to CU");
1113 break;
1114 default:
1115 snprintf(service, BUFSIZE, "0x%02x",
1116 sense->fmt.f71.smc);
1117 }
1118
1119 dev_warn (&device->cdev->dev, "I/O subsystem information: exception"
1120 " %s, service %s\n", exception, service);
1121 out_nomem:
1122 kfree(exception);
1123 kfree(service);
1124 }
1125
1126 /*
1127 * Print an Device Subsystem Service Information Message (message code f2)
1128 */
1129 static void
1130 tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
1131 {
1132 struct tape_3590_sense *sense;
1133 char *exception, *service;
1134
1135 exception = kmalloc(BUFSIZE, GFP_ATOMIC);
1136 service = kmalloc(BUFSIZE, GFP_ATOMIC);
1137
1138 if (!exception || !service)
1139 goto out_nomem;
1140
1141 sense = (struct tape_3590_sense *) irb->ecw;
1142 /* Exception Message */
1143 switch (sense->fmt.f71.emc) {
1144 case 0x01:
1145 snprintf(exception, BUFSIZE, "Effect of failure is unknown");
1146 break;
1147 case 0x02:
1148 snprintf(exception, BUFSIZE, "DV Exception - no performance"
1149 " impact");
1150 break;
1151 case 0x03:
1152 snprintf(exception, BUFSIZE, "DV Exception on channel "
1153 "interface 0x%02x", sense->fmt.f71.md[0]);
1154 break;
1155 case 0x04:
1156 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x",
1157 sense->fmt.f71.md[0]);
1158 break;
1159 case 0x05:
1160 snprintf(exception, BUFSIZE, "DV Exception on message display"
1161 " 0x%02x", sense->fmt.f71.md[0]);
1162 break;
1163 case 0x06:
1164 snprintf(exception, BUFSIZE, "DV Exception in tape path");
1165 break;
1166 case 0x07:
1167 snprintf(exception, BUFSIZE, "DV Exception in drive");
1168 break;
1169 default:
1170 snprintf(exception, BUFSIZE, "0x%02x",
1171 sense->fmt.f71.emc);
1172 }
1173 /* Service Message */
1174 switch (sense->fmt.f71.smc) {
1175 case 0x01:
1176 snprintf(service, BUFSIZE, "Repair impact is unknown");
1177 break;
1178 case 0x02:
1179 snprintf(service, BUFSIZE, "Repair will not impact device "
1180 "performance");
1181 break;
1182 case 0x03:
1183 if (sense->fmt.f71.mdf == 0)
1184 snprintf(service, BUFSIZE, "Repair will disable "
1185 "channel path 0x%x on DV",
1186 sense->fmt.f71.md[1]);
1187 else
1188 snprintf(service, BUFSIZE, "Repair will disable "
1189 "channel path (0x%x-0x%x) on DV",
1190 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1191 break;
1192 case 0x04:
1193 if (sense->fmt.f71.mdf == 0)
1194 snprintf(service, BUFSIZE, "Repair will disable "
1195 "interface 0x%x on DV", sense->fmt.f71.md[1]);
1196 else
1197 snprintf(service, BUFSIZE, "Repair will disable "
1198 "interfaces (0x%x-0x%x) on DV",
1199 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1200 break;
1201 case 0x05:
1202 if (sense->fmt.f71.mdf == 0)
1203 snprintf(service, BUFSIZE, "Repair will disable loader"
1204 " 0x%x on DV", sense->fmt.f71.md[1]);
1205 else
1206 snprintf(service, BUFSIZE, "Repair will disable loader"
1207 " (0x%x-0x%x) on DV",
1208 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1209 break;
1210 case 0x07:
1211 snprintf(service, BUFSIZE, "Repair will disable access to DV");
1212 break;
1213 case 0x08:
1214 if (sense->fmt.f71.mdf == 0)
1215 snprintf(service, BUFSIZE, "Repair will disable "
1216 "message display 0x%x on DV",
1217 sense->fmt.f71.md[1]);
1218 else
1219 snprintf(service, BUFSIZE, "Repair will disable "
1220 "message displays (0x%x-0x%x) on DV",
1221 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
1222 break;
1223 case 0x09:
1224 snprintf(service, BUFSIZE, "Clean DV");
1225 break;
1226 default:
1227 snprintf(service, BUFSIZE, "0x%02x",
1228 sense->fmt.f71.smc);
1229 }
1230
1231 dev_warn (&device->cdev->dev, "Device subsystem information: exception"
1232 " %s, service %s\n", exception, service);
1233 out_nomem:
1234 kfree(exception);
1235 kfree(service);
1236 }
1237
1238 /*
1239 * Print standard ERA Message
1240 */
1241 static void
1242 tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)
1243 {
1244 struct tape_3590_sense *sense;
1245
1246 sense = (struct tape_3590_sense *) irb->ecw;
1247 if (sense->mc == 0)
1248 return;
1249 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {
1250 if (tape_3590_msg[sense->mc] != NULL)
1251 dev_warn (&device->cdev->dev, "The tape unit has "
1252 "issued sense message %s\n",
1253 tape_3590_msg[sense->mc]);
1254 else
1255 dev_warn (&device->cdev->dev, "The tape unit has "
1256 "issued an unknown sense message code 0x%x\n",
1257 sense->mc);
1258 return;
1259 }
1260 if (sense->mc == 0xf0) {
1261 /* Standard Media Information Message */
1262 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, "
1263 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc,
1264 sense->fmt.f70.emc, sense->fmt.f70.smc,
1265 sense->fmt.f70.refcode, sense->fmt.f70.mid,
1266 sense->fmt.f70.fid);
1267 tape_3590_print_mim_msg_f0(device, irb);
1268 return;
1269 }
1270 if (sense->mc == 0xf1) {
1271 /* Standard I/O Subsystem Service Information Message */
1272 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x,"
1273 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
1274 sense->fmt.f71.sev, device->cdev->id.dev_model,
1275 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc,
1276 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2,
1277 sense->fmt.f71.refcode3);
1278 tape_3590_print_io_sim_msg_f1(device, irb);
1279 return;
1280 }
1281 if (sense->mc == 0xf2) {
1282 /* Standard Device Service Information Message */
1283 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x"
1284 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
1285 sense->fmt.f71.sev, device->cdev->id.dev_model,
1286 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc,
1287 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2,
1288 sense->fmt.f71.refcode3);
1289 tape_3590_print_dev_sim_msg_f2(device, irb);
1290 return;
1291 }
1292 if (sense->mc == 0xf3) {
1293 /* Standard Library Service Information Message */
1294 return;
1295 }
1296 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown "
1297 "sense message code %x\n", sense->mc);
1298 }
1299
1300 static int tape_3590_crypt_error(struct tape_device *device,
1301 struct tape_request *request, struct irb *irb)
1302 {
1303 u8 cu_rc;
1304 u16 ekm_rc2;
1305 char *sense;
1306
1307 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data;
1308 cu_rc = sense[0];
1309 ekm_rc2 = *((u16*) &sense[10]);
1310 if ((cu_rc == 0) && (ekm_rc2 == 0xee31))
1311 /* key not defined on EKM */
1312 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED);
1313 if ((cu_rc == 1) || (cu_rc == 2))
1314 /* No connection to EKM */
1315 return tape_3590_erp_basic(device, request, irb, -ENOTCONN);
1316
1317 dev_err (&device->cdev->dev, "The tape unit failed to obtain the "
1318 "encryption key from EKM\n");
1319
1320 return tape_3590_erp_basic(device, request, irb, -ENOKEY);
1321 }
1322
1323 /*
1324 * 3590 error Recovery routine:
1325 * If possible, it tries to recover from the error. If this is not possible,
1326 * inform the user about the problem.
1327 */
1328 static int
1329 tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
1330 struct irb *irb)
1331 {
1332 struct tape_3590_sense *sense;
1333
1334 sense = (struct tape_3590_sense *) irb->ecw;
1335
1336 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc);
1337
1338 /*
1339 * First check all RC-QRCs where we want to do something special
1340 * - "break": basic error recovery is done
1341 * - "goto out:": just print error message if available
1342 */
1343 switch (sense->rc_rqc) {
1344
1345 case 0x1110:
1346 tape_3590_print_era_msg(device, irb);
1347 return tape_3590_erp_read_buf_log(device, request, irb);
1348
1349 case 0x2011:
1350 tape_3590_print_era_msg(device, irb);
1351 return tape_3590_erp_read_alternate(device, request, irb);
1352
1353 case 0x2230:
1354 case 0x2231:
1355 tape_3590_print_era_msg(device, irb);
1356 return tape_3590_erp_special_interrupt(device, request, irb);
1357 case 0x2240:
1358 return tape_3590_crypt_error(device, request, irb);
1359
1360 case 0x3010:
1361 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
1362 device->cdev_id);
1363 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1364 case 0x3012:
1365 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
1366 device->cdev_id);
1367 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1368 case 0x3020:
1369 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);
1370 return tape_3590_erp_basic(device, request, irb, -ENOSPC);
1371
1372 case 0x3122:
1373 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
1374 device->cdev_id);
1375 return tape_3590_erp_basic(device, request, irb, -EIO);
1376 case 0x3123:
1377 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
1378 device->cdev_id);
1379 tape_med_state_set(device, MS_UNLOADED);
1380 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1381 return tape_3590_erp_basic(device, request, irb, 0);
1382
1383 case 0x4010:
1384 /*
1385 * print additional msg since default msg
1386 * "device intervention" is not very meaningfull
1387 */
1388 tape_med_state_set(device, MS_UNLOADED);
1389 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1390 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1391 case 0x4012: /* Device Long Busy */
1392 /* XXX: Also use long busy handling here? */
1393 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id);
1394 tape_3590_print_era_msg(device, irb);
1395 return tape_3590_erp_basic(device, request, irb, -EBUSY);
1396 case 0x4014:
1397 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id);
1398 return tape_3590_erp_long_busy(device, request, irb);
1399
1400 case 0x5010:
1401 if (sense->rac == 0xd0) {
1402 /* Swap */
1403 tape_3590_print_era_msg(device, irb);
1404 return tape_3590_erp_swap(device, request, irb);
1405 }
1406 if (sense->rac == 0x26) {
1407 /* Read Opposite */
1408 tape_3590_print_era_msg(device, irb);
1409 return tape_3590_erp_read_opposite(device, request,
1410 irb);
1411 }
1412 return tape_3590_erp_basic(device, request, irb, -EIO);
1413 case 0x5020:
1414 case 0x5021:
1415 case 0x5022:
1416 case 0x5040:
1417 case 0x5041:
1418 case 0x5042:
1419 tape_3590_print_era_msg(device, irb);
1420 return tape_3590_erp_swap(device, request, irb);
1421
1422 case 0x5110:
1423 case 0x5111:
1424 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1425
1426 case 0x5120:
1427 case 0x1120:
1428 tape_med_state_set(device, MS_UNLOADED);
1429 tape_3590_schedule_work(device, TO_CRYPT_OFF);
1430 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);
1431
1432 case 0x6020:
1433 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);
1434
1435 case 0x8011:
1436 return tape_3590_erp_basic(device, request, irb, -EPERM);
1437 case 0x8013:
1438 dev_warn (&device->cdev->dev, "A different host has privileged"
1439 " access to the tape unit\n");
1440 return tape_3590_erp_basic(device, request, irb, -EPERM);
1441 default:
1442 return tape_3590_erp_basic(device, request, irb, -EIO);
1443 }
1444 }
1445
1446 /*
1447 * 3590 interrupt handler:
1448 */
1449 static int
1450 tape_3590_irq(struct tape_device *device, struct tape_request *request,
1451 struct irb *irb)
1452 {
1453 if (request == NULL)
1454 return tape_3590_unsolicited_irq(device, irb);
1455
1456 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) &&
1457 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) &&
1458 (request->op == TO_WRI)) {
1459 /* Write at end of volume */
1460 DBF_EVENT(2, "End of volume\n");
1461 return tape_3590_erp_failed(device, request, irb, -ENOSPC);
1462 }
1463
1464 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
1465 return tape_3590_unit_check(device, request, irb);
1466
1467 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
1468 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) {
1469 if (request->op == TO_FSB || request->op == TO_BSB)
1470 request->rescnt++;
1471 else
1472 DBF_EVENT(5, "Unit Exception!\n");
1473 }
1474
1475 return tape_3590_done(device, request);
1476 }
1477
1478 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) {
1479 DBF_EVENT(2, "channel end\n");
1480 return TAPE_IO_PENDING;
1481 }
1482
1483 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
1484 DBF_EVENT(2, "Unit Attention when busy..\n");
1485 return TAPE_IO_PENDING;
1486 }
1487
1488 DBF_EVENT(6, "xunknownirq\n");
1489 tape_dump_sense_dbf(device, request, irb);
1490 return TAPE_IO_STOP;
1491 }
1492
1493
1494 static int tape_3590_read_dev_chars(struct tape_device *device,
1495 struct tape_3590_rdc_data *rdc_data)
1496 {
1497 int rc;
1498 struct tape_request *request;
1499
1500 request = tape_alloc_request(1, sizeof(*rdc_data));
1501 if (IS_ERR(request))
1502 return PTR_ERR(request);
1503 request->op = TO_RDC;
1504 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data),
1505 request->cpdata);
1506 rc = tape_do_io(device, request);
1507 if (rc == 0)
1508 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data));
1509 tape_free_request(request);
1510 return rc;
1511 }
1512
1513 /*
1514 * Setup device function
1515 */
1516 static int
1517 tape_3590_setup_device(struct tape_device *device)
1518 {
1519 int rc;
1520 struct tape_3590_disc_data *data;
1521 struct tape_3590_rdc_data *rdc_data;
1522
1523 DBF_EVENT(6, "3590 device setup\n");
1524 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA);
1525 if (data == NULL)
1526 return -ENOMEM;
1527 data->read_back_op = READ_PREVIOUS;
1528 device->discdata = data;
1529
1530 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA);
1531 if (!rdc_data) {
1532 rc = -ENOMEM;
1533 goto fail_kmalloc;
1534 }
1535 rc = tape_3590_read_dev_chars(device, rdc_data);
1536 if (rc) {
1537 DBF_LH(3, "Read device characteristics failed!\n");
1538 goto fail_rdc_data;
1539 }
1540 rc = tape_std_assign(device);
1541 if (rc)
1542 goto fail_rdc_data;
1543 if (rdc_data->data[31] == 0x13) {
1544 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK;
1545 tape_3592_disable_crypt(device);
1546 } else {
1547 DBF_EVENT(6, "Device has NO crypto support\n");
1548 }
1549 /* Try to find out if medium is loaded */
1550 rc = tape_3590_sense_medium(device);
1551 if (rc) {
1552 DBF_LH(3, "3590 medium sense returned %d\n", rc);
1553 goto fail_rdc_data;
1554 }
1555 return 0;
1556
1557 fail_rdc_data:
1558 kfree(rdc_data);
1559 fail_kmalloc:
1560 kfree(data);
1561 return rc;
1562 }
1563
1564 /*
1565 * Cleanup device function
1566 */
1567 static void
1568 tape_3590_cleanup_device(struct tape_device *device)
1569 {
1570 flush_workqueue(tape_3590_wq);
1571 tape_std_unassign(device);
1572
1573 kfree(device->discdata);
1574 device->discdata = NULL;
1575 }
1576
1577 /*
1578 * List of 3590 magnetic tape commands.
1579 */
1580 static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = {
1581 [MTRESET] = tape_std_mtreset,
1582 [MTFSF] = tape_std_mtfsf,
1583 [MTBSF] = tape_std_mtbsf,
1584 [MTFSR] = tape_std_mtfsr,
1585 [MTBSR] = tape_std_mtbsr,
1586 [MTWEOF] = tape_std_mtweof,
1587 [MTREW] = tape_std_mtrew,
1588 [MTOFFL] = tape_std_mtoffl,
1589 [MTNOP] = tape_std_mtnop,
1590 [MTRETEN] = tape_std_mtreten,
1591 [MTBSFM] = tape_std_mtbsfm,
1592 [MTFSFM] = tape_std_mtfsfm,
1593 [MTEOM] = tape_std_mteom,
1594 [MTERASE] = tape_std_mterase,
1595 [MTRAS1] = NULL,
1596 [MTRAS2] = NULL,
1597 [MTRAS3] = NULL,
1598 [MTSETBLK] = tape_std_mtsetblk,
1599 [MTSETDENSITY] = NULL,
1600 [MTSEEK] = tape_3590_mtseek,
1601 [MTTELL] = tape_3590_mttell,
1602 [MTSETDRVBUFFER] = NULL,
1603 [MTFSS] = NULL,
1604 [MTBSS] = NULL,
1605 [MTWSM] = NULL,
1606 [MTLOCK] = NULL,
1607 [MTUNLOCK] = NULL,
1608 [MTLOAD] = tape_std_mtload,
1609 [MTUNLOAD] = tape_std_mtunload,
1610 [MTCOMPRESSION] = tape_std_mtcompression,
1611 [MTSETPART] = NULL,
1612 [MTMKPART] = NULL
1613 };
1614
1615 /*
1616 * Tape discipline structure for 3590.
1617 */
1618 static struct tape_discipline tape_discipline_3590 = {
1619 .owner = THIS_MODULE,
1620 .setup_device = tape_3590_setup_device,
1621 .cleanup_device = tape_3590_cleanup_device,
1622 .process_eov = tape_std_process_eov,
1623 .irq = tape_3590_irq,
1624 .read_block = tape_std_read_block,
1625 .write_block = tape_std_write_block,
1626 .ioctl_fn = tape_3590_ioctl,
1627 .mtop_array = tape_3590_mtop
1628 };
1629
1630 static struct ccw_device_id tape_3590_ids[] = {
1631 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},
1632 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},
1633 { /* end of list */ }
1634 };
1635
1636 static int
1637 tape_3590_online(struct ccw_device *cdev)
1638 {
1639 return tape_generic_online(dev_get_drvdata(&cdev->dev),
1640 &tape_discipline_3590);
1641 }
1642
1643 static struct ccw_driver tape_3590_driver = {
1644 .driver = {
1645 .name = "tape_3590",
1646 .owner = THIS_MODULE,
1647 },
1648 .ids = tape_3590_ids,
1649 .probe = tape_generic_probe,
1650 .remove = tape_generic_remove,
1651 .set_offline = tape_generic_offline,
1652 .set_online = tape_3590_online,
1653 .freeze = tape_generic_pm_suspend,
1654 .int_class = IRQIO_TAP,
1655 };
1656
1657 /*
1658 * Setup discipline structure.
1659 */
1660 static int
1661 tape_3590_init(void)
1662 {
1663 int rc;
1664
1665 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));
1666 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);
1667 #ifdef DBF_LIKE_HELL
1668 debug_set_level(TAPE_DBF_AREA, 6);
1669 #endif
1670
1671 DBF_EVENT(3, "3590 init\n");
1672
1673 tape_3590_wq = alloc_workqueue("tape_3590", 0, 0);
1674 if (!tape_3590_wq)
1675 return -ENOMEM;
1676
1677 /* Register driver for 3590 tapes. */
1678 rc = ccw_driver_register(&tape_3590_driver);
1679 if (rc) {
1680 destroy_workqueue(tape_3590_wq);
1681 DBF_EVENT(3, "3590 init failed\n");
1682 } else
1683 DBF_EVENT(3, "3590 registered\n");
1684 return rc;
1685 }
1686
1687 static void
1688 tape_3590_exit(void)
1689 {
1690 ccw_driver_unregister(&tape_3590_driver);
1691 destroy_workqueue(tape_3590_wq);
1692 debug_unregister(TAPE_DBF_AREA);
1693 }
1694
1695 MODULE_DEVICE_TABLE(ccw, tape_3590_ids);
1696 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
1697 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
1698 MODULE_LICENSE("GPL");
1699
1700 module_init(tape_3590_init);
1701 module_exit(tape_3590_exit);
Linux kernel - Deliverables
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