2 * drivers/s390/char/tape_3590.c
3 * tape device discipline for 3590 tapes.
5 * Copyright (C) IBM Corp. 2001,2006
6 * Author(s): Stefan Bader <shbader@de.ibm.com>
7 * Michael Holzheu <holzheu@de.ibm.com>
8 * Martin Schwidefsky <schwidefsky@de.ibm.com>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/bio.h>
15 #define TAPE_DBF_AREA tape_3590_dbf
19 #include "tape_3590.h"
22 * Pointer to debug area.
24 debug_info_t
*TAPE_DBF_AREA
= NULL
;
25 EXPORT_SYMBOL(TAPE_DBF_AREA
);
27 /*******************************************************************
28 * Error Recovery fuctions:
29 * - Read Opposite: implemented
30 * - Read Device (buffered) log: BRA
31 * - Read Library log: BRA
34 * - Special Intercept: BRA
35 * - Read Alternate: implemented
36 *******************************************************************/
38 #define PRINTK_HEADER "TAPE_3590: "
40 static const char *tape_3590_msg
[TAPE_3590_MAX_MSG
] = {
42 [0x10] = "Lost Sense",
43 [0x11] = "Assigned Elsewhere",
44 [0x12] = "Allegiance Reset",
45 [0x13] = "Shared Access Violation",
46 [0x20] = "Command Reject",
47 [0x21] = "Configuration Error",
48 [0x22] = "Protection Exception",
49 [0x23] = "Write Protect",
50 [0x24] = "Write Length",
51 [0x25] = "Read-Only Format",
52 [0x31] = "Beginning of Partition",
53 [0x33] = "End of Partition",
54 [0x34] = "End of Data",
55 [0x35] = "Block not found",
56 [0x40] = "Device Intervention",
57 [0x41] = "Loader Intervention",
58 [0x42] = "Library Intervention",
59 [0x50] = "Write Error",
60 [0x51] = "Erase Error",
61 [0x52] = "Formatting Error",
62 [0x53] = "Read Error",
63 [0x54] = "Unsupported Format",
64 [0x55] = "No Formatting",
65 [0x56] = "Positioning lost",
66 [0x57] = "Read Length",
67 [0x60] = "Unsupported Medium",
68 [0x61] = "Medium Length Error",
69 [0x62] = "Medium removed",
70 [0x64] = "Load Check",
71 [0x65] = "Unload Check",
72 [0x70] = "Equipment Check",
73 [0x71] = "Bus out Check",
74 [0x72] = "Protocol Error",
75 [0x73] = "Interface Error",
77 [0x75] = "Halt Signal",
78 [0x90] = "Device fenced",
79 [0x91] = "Device Path fenced",
80 [0xa0] = "Volume misplaced",
81 [0xa1] = "Volume inaccessible",
82 [0xa2] = "Volume in input",
83 [0xa3] = "Volume ejected",
84 [0xa4] = "All categories reserved",
85 [0xa5] = "Duplicate Volume",
86 [0xa6] = "Library Manager Offline",
87 [0xa7] = "Library Output Station full",
88 [0xa8] = "Vision System non-operational",
89 [0xa9] = "Library Manager Equipment Check",
90 [0xaa] = "Library Equipment Check",
91 [0xab] = "All Library Cells full",
92 [0xac] = "No Cleaner Volumes in Library",
93 [0xad] = "I/O Station door open",
94 [0xae] = "Subsystem environmental alert",
101 tape_3590_ioctl(struct tape_device
*device
, unsigned int cmd
, unsigned long arg
)
104 case TAPE390_DISPLAY
: {
105 struct display_struct disp
;
107 if (copy_from_user(&disp
, (char __user
*) arg
, sizeof(disp
)))
110 return tape_std_display(device
, &disp
);
113 return -EINVAL
; /* no additional ioctls */
118 * SENSE Medium: Get Sense data about medium state
121 tape_3590_sense_medium(struct tape_device
*device
)
123 struct tape_request
*request
;
125 request
= tape_alloc_request(1, 128);
127 return PTR_ERR(request
);
128 request
->op
= TO_MSEN
;
129 tape_ccw_end(request
->cpaddr
, MEDIUM_SENSE
, 128, request
->cpdata
);
130 return tape_do_io_free(device
, request
);
134 * MTTELL: Tell block. Return the number of block relative to current file.
137 tape_3590_mttell(struct tape_device
*device
, int mt_count
)
142 rc
= tape_std_read_block_id(device
, &block_id
);
145 return block_id
>> 32;
149 * MTSEEK: seek to the specified block.
152 tape_3590_mtseek(struct tape_device
*device
, int count
)
154 struct tape_request
*request
;
156 DBF_EVENT(6, "xsee id: %x\n", count
);
157 request
= tape_alloc_request(3, 4);
159 return PTR_ERR(request
);
160 request
->op
= TO_LBL
;
161 tape_ccw_cc(request
->cpaddr
, MODE_SET_DB
, 1, device
->modeset_byte
);
162 *(__u32
*) request
->cpdata
= count
;
163 tape_ccw_cc(request
->cpaddr
+ 1, LOCATE
, 4, request
->cpdata
);
164 tape_ccw_end(request
->cpaddr
+ 2, NOP
, 0, NULL
);
165 return tape_do_io_free(device
, request
);
169 * Read Opposite Error Recovery Function:
170 * Used, when Read Forward does not work
173 tape_3590_read_opposite(struct tape_device
*device
,
174 struct tape_request
*request
)
176 struct tape_3590_disc_data
*data
;
179 * We have allocated 4 ccws in tape_std_read, so we can now
180 * transform the request to a read backward, followed by a
181 * forward space block.
183 request
->op
= TO_RBA
;
184 tape_ccw_cc(request
->cpaddr
, MODE_SET_DB
, 1, device
->modeset_byte
);
185 data
= device
->discdata
;
186 tape_ccw_cc_idal(request
->cpaddr
+ 1, data
->read_back_op
,
187 device
->char_data
.idal_buf
);
188 tape_ccw_cc(request
->cpaddr
+ 2, FORSPACEBLOCK
, 0, NULL
);
189 tape_ccw_end(request
->cpaddr
+ 3, NOP
, 0, NULL
);
190 DBF_EVENT(6, "xrop ccwg\n");
195 * This should be done after an interrupt with attention bit (0x80)
198 * After a "read attention message" request there are two possible
201 * 1. A unit check is presented, when attention sense is present (e.g. when
202 * a medium has been unloaded). The attention sense comes then
203 * together with the unit check. The recovery action is either "retry"
204 * (in case there is an attention message pending) or "permanent error".
206 * 2. The attention msg is written to the "read subsystem data" buffer.
207 * In this case we probably should print it to the console.
210 tape_3590_read_attmsg(struct tape_device
*device
)
212 struct tape_request
*request
;
215 request
= tape_alloc_request(3, 4096);
217 return PTR_ERR(request
);
218 request
->op
= TO_READ_ATTMSG
;
219 buf
= request
->cpdata
;
220 buf
[0] = PREP_RD_SS_DATA
;
221 buf
[6] = RD_ATTMSG
; /* read att msg */
222 tape_ccw_cc(request
->cpaddr
, PERFORM_SS_FUNC
, 12, buf
);
223 tape_ccw_cc(request
->cpaddr
+ 1, READ_SS_DATA
, 4096 - 12, buf
+ 12);
224 tape_ccw_end(request
->cpaddr
+ 2, NOP
, 0, NULL
);
225 return tape_do_io_free(device
, request
);
229 * These functions are used to schedule follow-up actions from within an
230 * interrupt context (like unsolicited interrupts).
232 struct work_handler_data
{
233 struct tape_device
*device
;
235 struct work_struct work
;
239 tape_3590_work_handler(void *data
)
241 struct work_handler_data
*p
= data
;
245 tape_3590_sense_medium(p
->device
);
248 tape_3590_read_attmsg(p
->device
);
251 DBF_EVENT(3, "T3590: work handler undefined for "
252 "operation 0x%02x\n", p
->op
);
254 tape_put_device(p
->device
);
259 tape_3590_schedule_work(struct tape_device
*device
, enum tape_op op
)
261 struct work_handler_data
*p
;
263 if ((p
= kzalloc(sizeof(*p
), GFP_ATOMIC
)) == NULL
)
266 INIT_WORK(&p
->work
, tape_3590_work_handler
, p
);
268 p
->device
= tape_get_device_reference(device
);
271 schedule_work(&p
->work
);
275 #ifdef CONFIG_S390_TAPE_BLOCK
279 static struct tape_request
*
280 tape_3590_bread(struct tape_device
*device
, struct request
*req
)
282 struct tape_request
*request
;
284 int count
= 0, start_block
, i
;
290 DBF_EVENT(6, "xBREDid:");
291 start_block
= req
->sector
>> TAPEBLOCK_HSEC_S2B
;
292 DBF_EVENT(6, "start_block = %i\n", start_block
);
294 rq_for_each_bio(bio
, req
) {
295 bio_for_each_segment(bv
, bio
, i
) {
296 count
+= bv
->bv_len
>> (TAPEBLOCK_HSEC_S2B
+ 9);
299 request
= tape_alloc_request(2 + count
+ 1, 4);
302 request
->op
= TO_BLOCK
;
303 *(__u32
*) request
->cpdata
= start_block
;
304 ccw
= request
->cpaddr
;
305 ccw
= tape_ccw_cc(ccw
, MODE_SET_DB
, 1, device
->modeset_byte
);
308 * We always setup a nop after the mode set ccw. This slot is
309 * used in tape_std_check_locate to insert a locate ccw if the
310 * current tape position doesn't match the start block to be read.
312 ccw
= tape_ccw_cc(ccw
, NOP
, 0, NULL
);
314 rq_for_each_bio(bio
, req
) {
315 bio_for_each_segment(bv
, bio
, i
) {
316 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
317 for (off
= 0; off
< bv
->bv_len
;
318 off
+= TAPEBLOCK_HSEC_SIZE
) {
319 ccw
->flags
= CCW_FLAG_CC
;
320 ccw
->cmd_code
= READ_FORWARD
;
321 ccw
->count
= TAPEBLOCK_HSEC_SIZE
;
322 set_normalized_cda(ccw
, (void *) __pa(dst
));
324 dst
+= TAPEBLOCK_HSEC_SIZE
;
326 if (off
> bv
->bv_len
)
330 ccw
= tape_ccw_end(ccw
, NOP
, 0, NULL
);
331 DBF_EVENT(6, "xBREDccwg\n");
336 tape_3590_free_bread(struct tape_request
*request
)
340 /* Last ccw is a nop and doesn't need clear_normalized_cda */
341 for (ccw
= request
->cpaddr
; ccw
->flags
& CCW_FLAG_CC
; ccw
++)
342 if (ccw
->cmd_code
== READ_FORWARD
)
343 clear_normalized_cda(ccw
);
344 tape_free_request(request
);
348 * check_locate is called just before the tape request is passed to
349 * the common io layer for execution. It has to check the current
350 * tape position and insert a locate ccw if it doesn't match the
351 * start block for the request.
354 tape_3590_check_locate(struct tape_device
*device
, struct tape_request
*request
)
358 start_block
= (__u32
*) request
->cpdata
;
359 if (*start_block
!= device
->blk_data
.block_position
) {
360 /* Add the start offset of the file to get the real block. */
361 *start_block
+= device
->bof
;
362 tape_ccw_cc(request
->cpaddr
+ 1, LOCATE
, 4, request
->cpdata
);
368 * The done handler is called at device/channel end and wakes up the sleeping
372 tape_3590_done(struct tape_device
*device
, struct tape_request
*request
)
374 struct tape_3590_med_sense
*sense
;
376 DBF_EVENT(6, "%s done\n", tape_op_verbose
[request
->op
]);
378 switch (request
->op
) {
392 tape_med_state_set(device
, MS_LOADED
);
395 tape_med_state_set(device
, MS_UNLOADED
);
398 sense
= (struct tape_3590_med_sense
*) request
->cpdata
;
399 if (sense
->masst
== MSENSE_UNASSOCIATED
)
400 tape_med_state_set(device
, MS_UNLOADED
);
401 if (sense
->masst
== MSENSE_ASSOCIATED_MOUNT
)
402 tape_med_state_set(device
, MS_LOADED
);
404 case TO_RBI
: /* RBI seems to succeed even without medium loaded. */
405 case TO_NOP
: /* Same to NOP. */
415 return TAPE_IO_SUCCESS
;
419 * This fuction is called, when error recovery was successfull
422 tape_3590_erp_succeded(struct tape_device
*device
, struct tape_request
*request
)
424 DBF_EVENT(3, "Error Recovery successfull for %s\n",
425 tape_op_verbose
[request
->op
]);
426 return tape_3590_done(device
, request
);
430 * This fuction is called, when error recovery was not successfull
433 tape_3590_erp_failed(struct tape_device
*device
, struct tape_request
*request
,
434 struct irb
*irb
, int rc
)
436 DBF_EVENT(3, "Error Recovery failed for %s\n",
437 tape_op_verbose
[request
->op
]);
438 tape_dump_sense_dbf(device
, request
, irb
);
443 * Error Recovery do retry
446 tape_3590_erp_retry(struct tape_device
*device
, struct tape_request
*request
,
449 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose
[request
->op
]);
450 tape_dump_sense_dbf(device
, request
, irb
);
451 return TAPE_IO_RETRY
;
455 * Handle unsolicited interrupts
458 tape_3590_unsolicited_irq(struct tape_device
*device
, struct irb
*irb
)
460 if (irb
->scsw
.dstat
== DEV_STAT_CHN_END
)
461 /* Probably result of halt ssch */
462 return TAPE_IO_PENDING
;
463 else if (irb
->scsw
.dstat
== 0x85)
464 /* Device Ready -> check medium state */
465 tape_3590_schedule_work(device
, TO_MSEN
);
466 else if (irb
->scsw
.dstat
& DEV_STAT_ATTENTION
)
467 tape_3590_schedule_work(device
, TO_READ_ATTMSG
);
469 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device
->cdev_id
);
470 PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
471 tape_dump_sense(device
, NULL
, irb
);
473 return TAPE_IO_SUCCESS
;
477 * Basic Recovery routine
480 tape_3590_erp_basic(struct tape_device
*device
, struct tape_request
*request
,
481 struct irb
*irb
, int rc
)
483 struct tape_3590_sense
*sense
;
485 sense
= (struct tape_3590_sense
*) irb
->ecw
;
487 switch (sense
->bra
) {
489 return tape_3590_erp_failed(device
, request
, irb
, rc
);
491 return tape_3590_erp_succeded(device
, request
);
493 return tape_3590_erp_retry(device
, request
, irb
);
495 return tape_3590_erp_failed(device
, request
, irb
, rc
);
497 PRINT_ERR("Unknown BRA %x - This should not happen!\n",
505 * RDL: Read Device (buffered) log
508 tape_3590_erp_read_buf_log(struct tape_device
*device
,
509 struct tape_request
*request
, struct irb
*irb
)
512 * We just do the basic error recovery at the moment (retry).
513 * Perhaps in the future, we read the log and dump it somewhere...
515 return tape_3590_erp_basic(device
, request
, irb
, -EIO
);
522 tape_3590_erp_swap(struct tape_device
*device
, struct tape_request
*request
,
526 * This error recovery should swap the tapes
527 * if the original has a problem. The operation
528 * should proceed with the new tape... this
529 * should probably be done in user space!
531 PRINT_WARN("(%s): Swap Tape Device!\n", device
->cdev
->dev
.bus_id
);
532 return tape_3590_erp_basic(device
, request
, irb
, -EIO
);
539 tape_3590_erp_long_busy(struct tape_device
*device
,
540 struct tape_request
*request
, struct irb
*irb
)
542 /* FIXME: how about WAITING for a minute ? */
543 PRINT_WARN("(%s): Device is busy! Please wait a minute!\n",
544 device
->cdev
->dev
.bus_id
);
545 return tape_3590_erp_basic(device
, request
, irb
, -EBUSY
);
549 * SPI: Special Intercept
552 tape_3590_erp_special_interrupt(struct tape_device
*device
,
553 struct tape_request
*request
, struct irb
*irb
)
555 return tape_3590_erp_basic(device
, request
, irb
, -EIO
);
559 * RDA: Read Alternate
562 tape_3590_erp_read_alternate(struct tape_device
*device
,
563 struct tape_request
*request
, struct irb
*irb
)
565 struct tape_3590_disc_data
*data
;
568 * The issued Read Backward or Read Previous command is not
569 * supported by the device
570 * The recovery action should be to issue another command:
571 * Read Revious: if Read Backward is not supported
572 * Read Backward: if Read Previous is not supported
574 data
= device
->discdata
;
575 if (data
->read_back_op
== READ_PREVIOUS
) {
576 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
578 data
->read_back_op
= READ_BACKWARD
;
580 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
582 data
->read_back_op
= READ_PREVIOUS
;
584 tape_3590_read_opposite(device
, request
);
585 return tape_3590_erp_retry(device
, request
, irb
);
589 * Error Recovery read opposite
592 tape_3590_erp_read_opposite(struct tape_device
*device
,
593 struct tape_request
*request
, struct irb
*irb
)
595 switch (request
->op
) {
598 * We did read forward, but the data could not be read.
599 * We will read backward and then skip forward again.
601 tape_3590_read_opposite(device
, request
);
602 return tape_3590_erp_retry(device
, request
, irb
);
604 /* We tried to read forward and backward, but hat no success */
605 return tape_3590_erp_failed(device
, request
, irb
, -EIO
);
608 PRINT_WARN("read_opposite_recovery_called_with_op: %s\n",
609 tape_op_verbose
[request
->op
]);
610 return tape_3590_erp_failed(device
, request
, irb
, -EIO
);
615 * Print an MIM (Media Information Message) (message code f0)
618 tape_3590_print_mim_msg_f0(struct tape_device
*device
, struct irb
*irb
)
620 struct tape_3590_sense
*sense
;
622 sense
= (struct tape_3590_sense
*) irb
->ecw
;
623 /* Exception Message */
624 switch (sense
->fmt
.f70
.emc
) {
626 PRINT_WARN("(%s): Data degraded\n", device
->cdev
->dev
.bus_id
);
629 PRINT_WARN("(%s): Data degraded in partion %i\n",
630 device
->cdev
->dev
.bus_id
, sense
->fmt
.f70
.mp
);
633 PRINT_WARN("(%s): Medium degraded\n", device
->cdev
->dev
.bus_id
);
636 PRINT_WARN("(%s): Medium degraded in partition %i\n",
637 device
->cdev
->dev
.bus_id
, sense
->fmt
.f70
.mp
);
640 PRINT_WARN("(%s): Block 0 Error\n", device
->cdev
->dev
.bus_id
);
643 PRINT_WARN("(%s): Medium Exception 0x%02x\n",
644 device
->cdev
->dev
.bus_id
, sense
->fmt
.f70
.md
);
647 PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n",
648 device
->cdev
->dev
.bus_id
, sense
->fmt
.f70
.emc
);
651 /* Service Message */
652 switch (sense
->fmt
.f70
.smc
) {
654 PRINT_WARN("(%s): Reference Media maintenance procedure %i\n",
655 device
->cdev
->dev
.bus_id
, sense
->fmt
.f70
.md
);
658 PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n",
659 device
->cdev
->dev
.bus_id
, sense
->fmt
.f70
.smc
);
665 * Print an I/O Subsystem Service Information Message (message code f1)
668 tape_3590_print_io_sim_msg_f1(struct tape_device
*device
, struct irb
*irb
)
670 struct tape_3590_sense
*sense
;
672 sense
= (struct tape_3590_sense
*) irb
->ecw
;
673 /* Exception Message */
674 switch (sense
->fmt
.f71
.emc
) {
676 PRINT_WARN("(%s): Effect of failure is unknown\n",
677 device
->cdev
->dev
.bus_id
);
680 PRINT_WARN("(%s): CU Exception - no performance impact\n",
681 device
->cdev
->dev
.bus_id
);
684 PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n",
685 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.md
[0]);
688 PRINT_WARN("(%s): CU Exception on device path 0x%02x\n",
689 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.md
[0]);
692 PRINT_WARN("(%s): CU Exception on library path 0x%02x\n",
693 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.md
[0]);
696 PRINT_WARN("(%s): CU Exception on node 0x%02x\n",
697 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.md
[0]);
700 PRINT_WARN("(%s): CU Exception on partition 0x%02x\n",
701 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.md
[0]);
704 PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n",
705 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.emc
);
707 /* Service Message */
708 switch (sense
->fmt
.f71
.smc
) {
710 PRINT_WARN("(%s): Repair impact is unknown\n",
711 device
->cdev
->dev
.bus_id
);
714 PRINT_WARN("(%s): Repair will not impact cu performance\n",
715 device
->cdev
->dev
.bus_id
);
718 if (sense
->fmt
.f71
.mdf
== 0)
719 PRINT_WARN("(%s): Repair will disable node "
721 device
->cdev
->dev
.bus_id
,
722 sense
->fmt
.f71
.md
[1]);
724 PRINT_WARN("(%s): Repair will disable nodes "
725 "(0x%x-0x%x) on CU\n",
726 device
->cdev
->dev
.bus_id
,
727 sense
->fmt
.f71
.md
[1], sense
->fmt
.f71
.md
[2]);
730 if (sense
->fmt
.f71
.mdf
== 0)
731 PRINT_WARN("(%s): Repair will disable cannel path "
733 device
->cdev
->dev
.bus_id
,
734 sense
->fmt
.f71
.md
[1]);
736 PRINT_WARN("(%s): Repair will disable cannel paths "
737 "(0x%x-0x%x) on CU\n",
738 device
->cdev
->dev
.bus_id
,
739 sense
->fmt
.f71
.md
[1], sense
->fmt
.f71
.md
[2]);
742 if (sense
->fmt
.f71
.mdf
== 0)
743 PRINT_WARN("(%s): Repair will disable device path "
745 device
->cdev
->dev
.bus_id
,
746 sense
->fmt
.f71
.md
[1]);
748 PRINT_WARN("(%s): Repair will disable device paths "
749 "(0x%x-0x%x) on CU\n",
750 device
->cdev
->dev
.bus_id
,
751 sense
->fmt
.f71
.md
[1], sense
->fmt
.f71
.md
[2]);
754 if (sense
->fmt
.f71
.mdf
== 0)
755 PRINT_WARN("(%s): Repair will disable library path "
757 device
->cdev
->dev
.bus_id
,
758 sense
->fmt
.f71
.md
[1]);
760 PRINT_WARN("(%s): Repair will disable library paths "
761 "(0x%x-0x%x) on CU\n",
762 device
->cdev
->dev
.bus_id
,
763 sense
->fmt
.f71
.md
[1], sense
->fmt
.f71
.md
[2]);
766 PRINT_WARN("(%s): Repair will disable access to CU\n",
767 device
->cdev
->dev
.bus_id
);
770 PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n",
771 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.smc
);
776 * Print an Device Subsystem Service Information Message (message code f2)
779 tape_3590_print_dev_sim_msg_f2(struct tape_device
*device
, struct irb
*irb
)
781 struct tape_3590_sense
*sense
;
783 sense
= (struct tape_3590_sense
*) irb
->ecw
;
784 /* Exception Message */
785 switch (sense
->fmt
.f71
.emc
) {
787 PRINT_WARN("(%s): Effect of failure is unknown\n",
788 device
->cdev
->dev
.bus_id
);
791 PRINT_WARN("(%s): DV Exception - no performance impact\n",
792 device
->cdev
->dev
.bus_id
);
795 PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n",
796 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.md
[0]);
799 PRINT_WARN("(%s): DV Exception on loader 0x%02x\n",
800 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.md
[0]);
803 PRINT_WARN("(%s): DV Exception on message display 0x%02x\n",
804 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.md
[0]);
807 PRINT_WARN("(%s): DV Exception in tape path\n",
808 device
->cdev
->dev
.bus_id
);
811 PRINT_WARN("(%s): DV Exception in drive\n",
812 device
->cdev
->dev
.bus_id
);
815 PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n",
816 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.emc
);
818 /* Service Message */
819 switch (sense
->fmt
.f71
.smc
) {
821 PRINT_WARN("(%s): Repair impact is unknown\n",
822 device
->cdev
->dev
.bus_id
);
825 PRINT_WARN("(%s): Repair will not impact device performance\n",
826 device
->cdev
->dev
.bus_id
);
829 if (sense
->fmt
.f71
.mdf
== 0)
830 PRINT_WARN("(%s): Repair will disable channel path "
832 device
->cdev
->dev
.bus_id
,
833 sense
->fmt
.f71
.md
[1]);
835 PRINT_WARN("(%s): Repair will disable channel path "
836 "(0x%x-0x%x) on DV\n",
837 device
->cdev
->dev
.bus_id
,
838 sense
->fmt
.f71
.md
[1], sense
->fmt
.f71
.md
[2]);
841 if (sense
->fmt
.f71
.mdf
== 0)
842 PRINT_WARN("(%s): Repair will disable interface 0x%x "
844 device
->cdev
->dev
.bus_id
,
845 sense
->fmt
.f71
.md
[1]);
847 PRINT_WARN("(%s): Repair will disable interfaces "
848 "(0x%x-0x%x) on DV\n",
849 device
->cdev
->dev
.bus_id
,
850 sense
->fmt
.f71
.md
[1], sense
->fmt
.f71
.md
[2]);
853 if (sense
->fmt
.f71
.mdf
== 0)
854 PRINT_WARN("(%s): Repair will disable loader 0x%x "
856 device
->cdev
->dev
.bus_id
,
857 sense
->fmt
.f71
.md
[1]);
859 PRINT_WARN("(%s): Repair will disable loader "
860 "(0x%x-0x%x) on DV\n",
861 device
->cdev
->dev
.bus_id
,
862 sense
->fmt
.f71
.md
[1], sense
->fmt
.f71
.md
[2]);
865 PRINT_WARN("(%s): Repair will disable access to DV\n",
866 device
->cdev
->dev
.bus_id
);
869 if (sense
->fmt
.f71
.mdf
== 0)
870 PRINT_WARN("(%s): Repair will disable message "
871 "display 0x%x on DV\n",
872 device
->cdev
->dev
.bus_id
,
873 sense
->fmt
.f71
.md
[1]);
875 PRINT_WARN("(%s): Repair will disable message "
876 "displays (0x%x-0x%x) on DV\n",
877 device
->cdev
->dev
.bus_id
,
878 sense
->fmt
.f71
.md
[1], sense
->fmt
.f71
.md
[2]);
881 PRINT_WARN("(%s): Clean DV\n", device
->cdev
->dev
.bus_id
);
884 PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n",
885 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.smc
);
890 * Print standard ERA Message
893 tape_3590_print_era_msg(struct tape_device
*device
, struct irb
*irb
)
895 struct tape_3590_sense
*sense
;
897 sense
= (struct tape_3590_sense
*) irb
->ecw
;
900 if ((sense
->mc
> 0) && (sense
->mc
< TAPE_3590_MAX_MSG
)) {
901 if (tape_3590_msg
[sense
->mc
] != NULL
)
902 PRINT_WARN("(%s): %s\n", device
->cdev
->dev
.bus_id
,
903 tape_3590_msg
[sense
->mc
]);
905 PRINT_WARN("(%s): Message Code 0x%x\n",
906 device
->cdev
->dev
.bus_id
, sense
->mc
);
910 if (sense
->mc
== 0xf0) {
911 /* Standard Media Information Message */
912 PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, "
913 "RC=%02x-%04x-%02x\n", device
->cdev
->dev
.bus_id
,
914 sense
->fmt
.f70
.sev
, sense
->mc
,
915 sense
->fmt
.f70
.emc
, sense
->fmt
.f70
.smc
,
916 sense
->fmt
.f70
.refcode
, sense
->fmt
.f70
.mid
,
918 tape_3590_print_mim_msg_f0(device
, irb
);
921 if (sense
->mc
== 0xf1) {
922 /* Standard I/O Subsystem Service Information Message */
923 PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, "
924 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
925 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.sev
,
926 device
->cdev
->id
.dev_model
,
927 sense
->mc
, sense
->fmt
.f71
.emc
,
928 sense
->fmt
.f71
.smc
, sense
->fmt
.f71
.refcode1
,
929 sense
->fmt
.f71
.refcode2
, sense
->fmt
.f71
.refcode3
);
930 tape_3590_print_io_sim_msg_f1(device
, irb
);
933 if (sense
->mc
== 0xf2) {
934 /* Standard Device Service Information Message */
935 PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, "
936 "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",
937 device
->cdev
->dev
.bus_id
, sense
->fmt
.f71
.sev
,
938 device
->cdev
->id
.dev_model
,
939 sense
->mc
, sense
->fmt
.f71
.emc
,
940 sense
->fmt
.f71
.smc
, sense
->fmt
.f71
.refcode1
,
941 sense
->fmt
.f71
.refcode2
, sense
->fmt
.f71
.refcode3
);
942 tape_3590_print_dev_sim_msg_f2(device
, irb
);
945 if (sense
->mc
== 0xf3) {
946 /* Standard Library Service Information Message */
949 PRINT_WARN("(%s): Device Message(%x)\n",
950 device
->cdev
->dev
.bus_id
, sense
->mc
);
954 * 3590 error Recovery routine:
955 * If possible, it tries to recover from the error. If this is not possible,
956 * inform the user about the problem.
959 tape_3590_unit_check(struct tape_device
*device
, struct tape_request
*request
,
962 struct tape_3590_sense
*sense
;
965 #ifdef CONFIG_S390_TAPE_BLOCK
966 if (request
->op
== TO_BLOCK
) {
968 * Recovery for block device requests. Set the block_position
969 * to something invalid and retry.
971 device
->blk_data
.block_position
= -1;
972 if (request
->retries
-- <= 0)
973 return tape_3590_erp_failed(device
, request
, irb
, -EIO
);
975 return tape_3590_erp_retry(device
, request
, irb
);
979 sense
= (struct tape_3590_sense
*) irb
->ecw
;
982 * First check all RC-QRCs where we want to do something special
983 * - "break": basic error recovery is done
984 * - "goto out:": just print error message if available
987 switch (sense
->rc_rqc
) {
990 tape_3590_print_era_msg(device
, irb
);
991 return tape_3590_erp_read_buf_log(device
, request
, irb
);
994 tape_3590_print_era_msg(device
, irb
);
995 return tape_3590_erp_read_alternate(device
, request
, irb
);
999 tape_3590_print_era_msg(device
, irb
);
1000 return tape_3590_erp_special_interrupt(device
, request
, irb
);
1003 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",
1005 return tape_3590_erp_basic(device
, request
, irb
, -ENOSPC
);
1007 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",
1009 return tape_3590_erp_basic(device
, request
, irb
, -ENOSPC
);
1011 DBF_EVENT(2, "(%08x): End of Data Mark\n", device
->cdev_id
);
1012 return tape_3590_erp_basic(device
, request
, irb
, -ENOSPC
);
1015 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",
1017 return tape_3590_erp_basic(device
, request
, irb
, -EIO
);
1019 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",
1021 tape_med_state_set(device
, MS_UNLOADED
);
1022 return tape_3590_erp_basic(device
, request
, irb
, 0);
1026 * print additional msg since default msg
1027 * "device intervention" is not very meaningfull
1029 PRINT_WARN("(%s): Tape operation when medium not loaded\n",
1030 device
->cdev
->dev
.bus_id
);
1031 tape_med_state_set(device
, MS_UNLOADED
);
1032 return tape_3590_erp_basic(device
, request
, irb
, -ENOMEDIUM
);
1033 case 0x4012: /* Device Long Busy */
1034 tape_3590_print_era_msg(device
, irb
);
1035 return tape_3590_erp_long_busy(device
, request
, irb
);
1038 if (sense
->rac
== 0xd0) {
1040 tape_3590_print_era_msg(device
, irb
);
1041 return tape_3590_erp_swap(device
, request
, irb
);
1043 if (sense
->rac
== 0x26) {
1045 tape_3590_print_era_msg(device
, irb
);
1046 return tape_3590_erp_read_opposite(device
, request
,
1049 return tape_3590_erp_basic(device
, request
, irb
, -EIO
);
1056 tape_3590_print_era_msg(device
, irb
);
1057 return tape_3590_erp_swap(device
, request
, irb
);
1061 return tape_3590_erp_basic(device
, request
, irb
, -EMEDIUMTYPE
);
1065 tape_med_state_set(device
, MS_UNLOADED
);
1066 return tape_3590_erp_basic(device
, request
, irb
, -ENOMEDIUM
);
1069 PRINT_WARN("(%s): Cartridge of wrong type ?\n",
1070 device
->cdev
->dev
.bus_id
);
1071 return tape_3590_erp_basic(device
, request
, irb
, -EMEDIUMTYPE
);
1074 PRINT_WARN("(%s): Another host has reserved the tape device\n",
1075 device
->cdev
->dev
.bus_id
);
1076 return tape_3590_erp_basic(device
, request
, irb
, -EPERM
);
1078 PRINT_WARN("(%s): Another host has priviliged access to the "
1079 "tape device\n", device
->cdev
->dev
.bus_id
);
1080 PRINT_WARN("(%s): To solve the problem unload the current "
1081 "cartridge!\n", device
->cdev
->dev
.bus_id
);
1082 return tape_3590_erp_basic(device
, request
, irb
, -EPERM
);
1084 return tape_3590_erp_basic(device
, request
, irb
, -EIO
);
1089 * 3590 interrupt handler:
1092 tape_3590_irq(struct tape_device
*device
, struct tape_request
*request
,
1095 if (request
== NULL
)
1096 return tape_3590_unsolicited_irq(device
, irb
);
1098 if ((irb
->scsw
.dstat
& DEV_STAT_UNIT_EXCEP
) &&
1099 (irb
->scsw
.dstat
& DEV_STAT_DEV_END
) && (request
->op
== TO_WRI
)) {
1100 /* Write at end of volume */
1101 DBF_EVENT(2, "End of volume\n");
1102 return tape_3590_erp_failed(device
, request
, irb
, -ENOSPC
);
1105 if (irb
->scsw
.dstat
& DEV_STAT_UNIT_CHECK
)
1106 return tape_3590_unit_check(device
, request
, irb
);
1108 if (irb
->scsw
.dstat
& DEV_STAT_DEV_END
) {
1109 if (irb
->scsw
.dstat
== DEV_STAT_UNIT_EXCEP
) {
1110 if (request
->op
== TO_FSB
|| request
->op
== TO_BSB
)
1113 DBF_EVENT(5, "Unit Exception!\n");
1116 return tape_3590_done(device
, request
);
1119 if (irb
->scsw
.dstat
& DEV_STAT_CHN_END
) {
1120 DBF_EVENT(2, "cannel end\n");
1121 return TAPE_IO_PENDING
;
1124 if (irb
->scsw
.dstat
& DEV_STAT_ATTENTION
) {
1125 DBF_EVENT(2, "Unit Attention when busy..\n");
1126 return TAPE_IO_PENDING
;
1129 DBF_EVENT(6, "xunknownirq\n");
1130 PRINT_ERR("Unexpected interrupt.\n");
1131 PRINT_ERR("Current op is: %s", tape_op_verbose
[request
->op
]);
1132 tape_dump_sense(device
, request
, irb
);
1133 return TAPE_IO_STOP
;
1137 * Setup device function
1140 tape_3590_setup_device(struct tape_device
*device
)
1143 struct tape_3590_disc_data
*data
;
1145 DBF_EVENT(6, "3590 device setup\n");
1146 data
= kmalloc(sizeof(struct tape_3590_disc_data
),
1147 GFP_KERNEL
| GFP_DMA
);
1150 data
->read_back_op
= READ_PREVIOUS
;
1151 device
->discdata
= data
;
1153 if ((rc
= tape_std_assign(device
)) == 0) {
1154 /* Try to find out if medium is loaded */
1155 if ((rc
= tape_3590_sense_medium(device
)) != 0)
1156 DBF_LH(3, "3590 medium sense returned %d\n", rc
);
1163 * Cleanup device function
1166 tape_3590_cleanup_device(struct tape_device
*device
)
1168 flush_scheduled_work();
1169 tape_std_unassign(device
);
1171 kfree(device
->discdata
);
1172 device
->discdata
= NULL
;
1176 * List of 3590 magnetic tape commands.
1178 static tape_mtop_fn tape_3590_mtop
[TAPE_NR_MTOPS
] = {
1179 [MTRESET
] = tape_std_mtreset
,
1180 [MTFSF
] = tape_std_mtfsf
,
1181 [MTBSF
] = tape_std_mtbsf
,
1182 [MTFSR
] = tape_std_mtfsr
,
1183 [MTBSR
] = tape_std_mtbsr
,
1184 [MTWEOF
] = tape_std_mtweof
,
1185 [MTREW
] = tape_std_mtrew
,
1186 [MTOFFL
] = tape_std_mtoffl
,
1187 [MTNOP
] = tape_std_mtnop
,
1188 [MTRETEN
] = tape_std_mtreten
,
1189 [MTBSFM
] = tape_std_mtbsfm
,
1190 [MTFSFM
] = tape_std_mtfsfm
,
1191 [MTEOM
] = tape_std_mteom
,
1192 [MTERASE
] = tape_std_mterase
,
1196 [MTSETBLK
] = tape_std_mtsetblk
,
1197 [MTSETDENSITY
] = NULL
,
1198 [MTSEEK
] = tape_3590_mtseek
,
1199 [MTTELL
] = tape_3590_mttell
,
1200 [MTSETDRVBUFFER
] = NULL
,
1206 [MTLOAD
] = tape_std_mtload
,
1207 [MTUNLOAD
] = tape_std_mtunload
,
1208 [MTCOMPRESSION
] = tape_std_mtcompression
,
1214 * Tape discipline structure for 3590.
1216 static struct tape_discipline tape_discipline_3590
= {
1217 .owner
= THIS_MODULE
,
1218 .setup_device
= tape_3590_setup_device
,
1219 .cleanup_device
= tape_3590_cleanup_device
,
1220 .process_eov
= tape_std_process_eov
,
1221 .irq
= tape_3590_irq
,
1222 .read_block
= tape_std_read_block
,
1223 .write_block
= tape_std_write_block
,
1224 #ifdef CONFIG_S390_TAPE_BLOCK
1225 .bread
= tape_3590_bread
,
1226 .free_bread
= tape_3590_free_bread
,
1227 .check_locate
= tape_3590_check_locate
,
1229 .ioctl_fn
= tape_3590_ioctl
,
1230 .mtop_array
= tape_3590_mtop
1233 static struct ccw_device_id tape_3590_ids
[] = {
1234 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info
= tape_3590
},
1235 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info
= tape_3592
},
1236 { /* end of list */ }
1240 tape_3590_online(struct ccw_device
*cdev
)
1242 return tape_generic_online(cdev
->dev
.driver_data
,
1243 &tape_discipline_3590
);
1247 tape_3590_offline(struct ccw_device
*cdev
)
1249 return tape_generic_offline(cdev
->dev
.driver_data
);
1252 static struct ccw_driver tape_3590_driver
= {
1253 .name
= "tape_3590",
1254 .owner
= THIS_MODULE
,
1255 .ids
= tape_3590_ids
,
1256 .probe
= tape_generic_probe
,
1257 .remove
= tape_generic_remove
,
1258 .set_offline
= tape_3590_offline
,
1259 .set_online
= tape_3590_online
,
1263 * Setup discipline structure.
1266 tape_3590_init(void)
1270 TAPE_DBF_AREA
= debug_register("tape_3590", 2, 2, 4 * sizeof(long));
1271 debug_register_view(TAPE_DBF_AREA
, &debug_sprintf_view
);
1272 #ifdef DBF_LIKE_HELL
1273 debug_set_level(TAPE_DBF_AREA
, 6);
1276 DBF_EVENT(3, "3590 init\n");
1277 /* Register driver for 3590 tapes. */
1278 rc
= ccw_driver_register(&tape_3590_driver
);
1280 DBF_EVENT(3, "3590 init failed\n");
1282 DBF_EVENT(3, "3590 registered\n");
1287 tape_3590_exit(void)
1289 ccw_driver_unregister(&tape_3590_driver
);
1291 debug_unregister(TAPE_DBF_AREA
);
1294 MODULE_DEVICE_TABLE(ccw
, tape_3590_ids
);
1295 MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");
1296 MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");
1297 MODULE_LICENSE("GPL");
1299 module_init(tape_3590_init
);
1300 module_exit(tape_3590_exit
);