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b6cba4ee SB |
1 | /* |
2 | * drivers/s390/char/tape_3590.c | |
3 | * tape device discipline for 3590 tapes. | |
4 | * | |
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> | |
9 | */ | |
10 | ||
b6cba4ee SB |
11 | #include <linux/module.h> |
12 | #include <linux/init.h> | |
13 | #include <linux/bio.h> | |
14 | ||
15 | #define TAPE_DBF_AREA tape_3590_dbf | |
16 | ||
17 | #include "tape.h" | |
18 | #include "tape_std.h" | |
19 | #include "tape_3590.h" | |
20 | ||
21 | /* | |
22 | * Pointer to debug area. | |
23 | */ | |
24 | debug_info_t *TAPE_DBF_AREA = NULL; | |
25 | EXPORT_SYMBOL(TAPE_DBF_AREA); | |
26 | ||
27 | /******************************************************************* | |
28 | * Error Recovery fuctions: | |
29 | * - Read Opposite: implemented | |
30 | * - Read Device (buffered) log: BRA | |
31 | * - Read Library log: BRA | |
32 | * - Swap Devices: BRA | |
33 | * - Long Busy: BRA | |
34 | * - Special Intercept: BRA | |
35 | * - Read Alternate: implemented | |
36 | *******************************************************************/ | |
37 | ||
38 | #define PRINTK_HEADER "TAPE_3590: " | |
39 | ||
40 | static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { | |
41 | [0x00] = "", | |
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", | |
76 | [0x74] = "Overrun", | |
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", | |
95 | }; | |
96 | ||
97 | /* | |
98 | * 3590 IOCTL Overload | |
99 | */ | |
100 | static int | |
101 | tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) | |
102 | { | |
103 | switch (cmd) { | |
104 | case TAPE390_DISPLAY: { | |
105 | struct display_struct disp; | |
106 | ||
107 | if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) | |
108 | return -EFAULT; | |
109 | ||
110 | return tape_std_display(device, &disp); | |
111 | } | |
112 | default: | |
113 | return -EINVAL; /* no additional ioctls */ | |
114 | } | |
115 | } | |
116 | ||
117 | /* | |
118 | * SENSE Medium: Get Sense data about medium state | |
119 | */ | |
120 | static int | |
121 | tape_3590_sense_medium(struct tape_device *device) | |
122 | { | |
123 | struct tape_request *request; | |
124 | ||
125 | request = tape_alloc_request(1, 128); | |
126 | if (IS_ERR(request)) | |
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); | |
131 | } | |
132 | ||
133 | /* | |
134 | * MTTELL: Tell block. Return the number of block relative to current file. | |
135 | */ | |
136 | static int | |
137 | tape_3590_mttell(struct tape_device *device, int mt_count) | |
138 | { | |
139 | __u64 block_id; | |
140 | int rc; | |
141 | ||
142 | rc = tape_std_read_block_id(device, &block_id); | |
143 | if (rc) | |
144 | return rc; | |
145 | return block_id >> 32; | |
146 | } | |
147 | ||
148 | /* | |
149 | * MTSEEK: seek to the specified block. | |
150 | */ | |
151 | static int | |
152 | tape_3590_mtseek(struct tape_device *device, int count) | |
153 | { | |
154 | struct tape_request *request; | |
155 | ||
156 | DBF_EVENT(6, "xsee id: %x\n", count); | |
157 | request = tape_alloc_request(3, 4); | |
158 | if (IS_ERR(request)) | |
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); | |
166 | } | |
167 | ||
168 | /* | |
169 | * Read Opposite Error Recovery Function: | |
170 | * Used, when Read Forward does not work | |
171 | */ | |
172 | static void | |
173 | tape_3590_read_opposite(struct tape_device *device, | |
174 | struct tape_request *request) | |
175 | { | |
176 | struct tape_3590_disc_data *data; | |
177 | ||
178 | /* | |
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. | |
182 | */ | |
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"); | |
191 | } | |
192 | ||
193 | /* | |
194 | * Read Attention Msg | |
195 | * This should be done after an interrupt with attention bit (0x80) | |
196 | * in device state. | |
197 | * | |
198 | * After a "read attention message" request there are two possible | |
199 | * results: | |
200 | * | |
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". | |
205 | * | |
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. | |
208 | */ | |
209 | static int | |
210 | tape_3590_read_attmsg(struct tape_device *device) | |
211 | { | |
212 | struct tape_request *request; | |
213 | char *buf; | |
214 | ||
215 | request = tape_alloc_request(3, 4096); | |
216 | if (IS_ERR(request)) | |
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); | |
226 | } | |
227 | ||
228 | /* | |
229 | * These functions are used to schedule follow-up actions from within an | |
230 | * interrupt context (like unsolicited interrupts). | |
231 | */ | |
2cc924b8 SB |
232 | struct work_handler_data { |
233 | struct tape_device *device; | |
234 | enum tape_op op; | |
235 | struct work_struct work; | |
236 | }; | |
237 | ||
b6cba4ee | 238 | static void |
c1637532 | 239 | tape_3590_work_handler(struct work_struct *work) |
b6cba4ee | 240 | { |
c1637532 MS |
241 | struct work_handler_data *p = |
242 | container_of(work, struct work_handler_data, work); | |
b6cba4ee SB |
243 | |
244 | switch (p->op) { | |
245 | case TO_MSEN: | |
246 | tape_3590_sense_medium(p->device); | |
247 | break; | |
248 | case TO_READ_ATTMSG: | |
249 | tape_3590_read_attmsg(p->device); | |
250 | break; | |
251 | default: | |
252 | DBF_EVENT(3, "T3590: work handler undefined for " | |
253 | "operation 0x%02x\n", p->op); | |
254 | } | |
255 | tape_put_device(p->device); | |
256 | kfree(p); | |
257 | } | |
258 | ||
259 | static int | |
260 | tape_3590_schedule_work(struct tape_device *device, enum tape_op op) | |
261 | { | |
2cc924b8 | 262 | struct work_handler_data *p; |
b6cba4ee SB |
263 | |
264 | if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) | |
265 | return -ENOMEM; | |
266 | ||
c1637532 | 267 | INIT_WORK(&p->work, tape_3590_work_handler); |
b6cba4ee SB |
268 | |
269 | p->device = tape_get_device_reference(device); | |
270 | p->op = op; | |
271 | ||
272 | schedule_work(&p->work); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | #ifdef CONFIG_S390_TAPE_BLOCK | |
277 | /* | |
278 | * Tape Block READ | |
279 | */ | |
280 | static struct tape_request * | |
281 | tape_3590_bread(struct tape_device *device, struct request *req) | |
282 | { | |
283 | struct tape_request *request; | |
284 | struct ccw1 *ccw; | |
285 | int count = 0, start_block, i; | |
286 | unsigned off; | |
287 | char *dst; | |
288 | struct bio_vec *bv; | |
289 | struct bio *bio; | |
290 | ||
291 | DBF_EVENT(6, "xBREDid:"); | |
292 | start_block = req->sector >> TAPEBLOCK_HSEC_S2B; | |
293 | DBF_EVENT(6, "start_block = %i\n", start_block); | |
294 | ||
295 | rq_for_each_bio(bio, req) { | |
296 | bio_for_each_segment(bv, bio, i) { | |
297 | count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); | |
298 | } | |
299 | } | |
300 | request = tape_alloc_request(2 + count + 1, 4); | |
301 | if (IS_ERR(request)) | |
302 | return request; | |
303 | request->op = TO_BLOCK; | |
304 | *(__u32 *) request->cpdata = start_block; | |
305 | ccw = request->cpaddr; | |
306 | ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); | |
307 | ||
308 | /* | |
309 | * We always setup a nop after the mode set ccw. This slot is | |
310 | * used in tape_std_check_locate to insert a locate ccw if the | |
311 | * current tape position doesn't match the start block to be read. | |
312 | */ | |
313 | ccw = tape_ccw_cc(ccw, NOP, 0, NULL); | |
314 | ||
315 | rq_for_each_bio(bio, req) { | |
316 | bio_for_each_segment(bv, bio, i) { | |
2cc924b8 | 317 | dst = page_address(bv->bv_page) + bv->bv_offset; |
b6cba4ee SB |
318 | for (off = 0; off < bv->bv_len; |
319 | off += TAPEBLOCK_HSEC_SIZE) { | |
320 | ccw->flags = CCW_FLAG_CC; | |
321 | ccw->cmd_code = READ_FORWARD; | |
322 | ccw->count = TAPEBLOCK_HSEC_SIZE; | |
323 | set_normalized_cda(ccw, (void *) __pa(dst)); | |
324 | ccw++; | |
325 | dst += TAPEBLOCK_HSEC_SIZE; | |
326 | } | |
327 | if (off > bv->bv_len) | |
328 | BUG(); | |
329 | } | |
330 | } | |
331 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
332 | DBF_EVENT(6, "xBREDccwg\n"); | |
333 | return request; | |
334 | } | |
335 | ||
336 | static void | |
337 | tape_3590_free_bread(struct tape_request *request) | |
338 | { | |
339 | struct ccw1 *ccw; | |
340 | ||
341 | /* Last ccw is a nop and doesn't need clear_normalized_cda */ | |
342 | for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) | |
343 | if (ccw->cmd_code == READ_FORWARD) | |
344 | clear_normalized_cda(ccw); | |
345 | tape_free_request(request); | |
346 | } | |
347 | ||
348 | /* | |
349 | * check_locate is called just before the tape request is passed to | |
350 | * the common io layer for execution. It has to check the current | |
351 | * tape position and insert a locate ccw if it doesn't match the | |
352 | * start block for the request. | |
353 | */ | |
354 | static void | |
355 | tape_3590_check_locate(struct tape_device *device, struct tape_request *request) | |
356 | { | |
357 | __u32 *start_block; | |
358 | ||
359 | start_block = (__u32 *) request->cpdata; | |
360 | if (*start_block != device->blk_data.block_position) { | |
361 | /* Add the start offset of the file to get the real block. */ | |
362 | *start_block += device->bof; | |
363 | tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); | |
364 | } | |
365 | } | |
366 | #endif | |
367 | ||
368 | /* | |
369 | * The done handler is called at device/channel end and wakes up the sleeping | |
370 | * process | |
371 | */ | |
372 | static int | |
373 | tape_3590_done(struct tape_device *device, struct tape_request *request) | |
374 | { | |
375 | struct tape_3590_med_sense *sense; | |
376 | ||
377 | DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); | |
378 | ||
379 | switch (request->op) { | |
380 | case TO_BSB: | |
381 | case TO_BSF: | |
382 | case TO_DSE: | |
383 | case TO_FSB: | |
384 | case TO_FSF: | |
385 | case TO_LBL: | |
386 | case TO_RFO: | |
387 | case TO_RBA: | |
388 | case TO_REW: | |
389 | case TO_WRI: | |
390 | case TO_WTM: | |
391 | case TO_BLOCK: | |
392 | case TO_LOAD: | |
393 | tape_med_state_set(device, MS_LOADED); | |
394 | break; | |
395 | case TO_RUN: | |
396 | tape_med_state_set(device, MS_UNLOADED); | |
397 | break; | |
398 | case TO_MSEN: | |
399 | sense = (struct tape_3590_med_sense *) request->cpdata; | |
400 | if (sense->masst == MSENSE_UNASSOCIATED) | |
401 | tape_med_state_set(device, MS_UNLOADED); | |
402 | if (sense->masst == MSENSE_ASSOCIATED_MOUNT) | |
403 | tape_med_state_set(device, MS_LOADED); | |
404 | break; | |
405 | case TO_RBI: /* RBI seems to succeed even without medium loaded. */ | |
406 | case TO_NOP: /* Same to NOP. */ | |
407 | case TO_READ_CONFIG: | |
408 | case TO_READ_ATTMSG: | |
409 | case TO_DIS: | |
410 | case TO_ASSIGN: | |
411 | case TO_UNASSIGN: | |
412 | break; | |
413 | case TO_SIZE: | |
414 | break; | |
415 | } | |
416 | return TAPE_IO_SUCCESS; | |
417 | } | |
418 | ||
419 | /* | |
420 | * This fuction is called, when error recovery was successfull | |
421 | */ | |
422 | static inline int | |
423 | tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) | |
424 | { | |
425 | DBF_EVENT(3, "Error Recovery successfull for %s\n", | |
426 | tape_op_verbose[request->op]); | |
427 | return tape_3590_done(device, request); | |
428 | } | |
429 | ||
430 | /* | |
431 | * This fuction is called, when error recovery was not successfull | |
432 | */ | |
433 | static inline int | |
434 | tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, | |
435 | struct irb *irb, int rc) | |
436 | { | |
437 | DBF_EVENT(3, "Error Recovery failed for %s\n", | |
438 | tape_op_verbose[request->op]); | |
439 | tape_dump_sense_dbf(device, request, irb); | |
440 | return rc; | |
441 | } | |
442 | ||
443 | /* | |
444 | * Error Recovery do retry | |
445 | */ | |
446 | static inline int | |
447 | tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, | |
448 | struct irb *irb) | |
449 | { | |
450 | DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); | |
451 | tape_dump_sense_dbf(device, request, irb); | |
452 | return TAPE_IO_RETRY; | |
453 | } | |
454 | ||
455 | /* | |
456 | * Handle unsolicited interrupts | |
457 | */ | |
458 | static int | |
459 | tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) | |
460 | { | |
461 | if (irb->scsw.dstat == DEV_STAT_CHN_END) | |
462 | /* Probably result of halt ssch */ | |
463 | return TAPE_IO_PENDING; | |
464 | else if (irb->scsw.dstat == 0x85) | |
465 | /* Device Ready -> check medium state */ | |
466 | tape_3590_schedule_work(device, TO_MSEN); | |
467 | else if (irb->scsw.dstat & DEV_STAT_ATTENTION) | |
468 | tape_3590_schedule_work(device, TO_READ_ATTMSG); | |
469 | else { | |
470 | DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); | |
471 | PRINT_WARN("Unsolicited IRQ (Device End) caught.\n"); | |
472 | tape_dump_sense(device, NULL, irb); | |
473 | } | |
474 | return TAPE_IO_SUCCESS; | |
475 | } | |
476 | ||
477 | /* | |
478 | * Basic Recovery routine | |
479 | */ | |
480 | static int | |
481 | tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, | |
482 | struct irb *irb, int rc) | |
483 | { | |
484 | struct tape_3590_sense *sense; | |
485 | ||
486 | sense = (struct tape_3590_sense *) irb->ecw; | |
487 | ||
488 | switch (sense->bra) { | |
489 | case SENSE_BRA_PER: | |
490 | return tape_3590_erp_failed(device, request, irb, rc); | |
491 | case SENSE_BRA_CONT: | |
492 | return tape_3590_erp_succeded(device, request); | |
493 | case SENSE_BRA_RE: | |
494 | return tape_3590_erp_retry(device, request, irb); | |
495 | case SENSE_BRA_DRE: | |
496 | return tape_3590_erp_failed(device, request, irb, rc); | |
497 | default: | |
498 | PRINT_ERR("Unknown BRA %x - This should not happen!\n", | |
499 | sense->bra); | |
500 | BUG(); | |
501 | return TAPE_IO_STOP; | |
502 | } | |
503 | } | |
504 | ||
505 | /* | |
506 | * RDL: Read Device (buffered) log | |
507 | */ | |
508 | static int | |
509 | tape_3590_erp_read_buf_log(struct tape_device *device, | |
510 | struct tape_request *request, struct irb *irb) | |
511 | { | |
512 | /* | |
513 | * We just do the basic error recovery at the moment (retry). | |
514 | * Perhaps in the future, we read the log and dump it somewhere... | |
515 | */ | |
516 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
517 | } | |
518 | ||
519 | /* | |
520 | * SWAP: Swap Devices | |
521 | */ | |
522 | static int | |
523 | tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, | |
524 | struct irb *irb) | |
525 | { | |
526 | /* | |
527 | * This error recovery should swap the tapes | |
528 | * if the original has a problem. The operation | |
529 | * should proceed with the new tape... this | |
530 | * should probably be done in user space! | |
531 | */ | |
532 | PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id); | |
533 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
534 | } | |
535 | ||
536 | /* | |
537 | * LBY: Long Busy | |
538 | */ | |
539 | static int | |
540 | tape_3590_erp_long_busy(struct tape_device *device, | |
541 | struct tape_request *request, struct irb *irb) | |
542 | { | |
543 | /* FIXME: how about WAITING for a minute ? */ | |
544 | PRINT_WARN("(%s): Device is busy! Please wait a minute!\n", | |
545 | device->cdev->dev.bus_id); | |
546 | return tape_3590_erp_basic(device, request, irb, -EBUSY); | |
547 | } | |
548 | ||
549 | /* | |
550 | * SPI: Special Intercept | |
551 | */ | |
552 | static int | |
553 | tape_3590_erp_special_interrupt(struct tape_device *device, | |
554 | struct tape_request *request, struct irb *irb) | |
555 | { | |
556 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
557 | } | |
558 | ||
559 | /* | |
560 | * RDA: Read Alternate | |
561 | */ | |
562 | static int | |
563 | tape_3590_erp_read_alternate(struct tape_device *device, | |
564 | struct tape_request *request, struct irb *irb) | |
565 | { | |
566 | struct tape_3590_disc_data *data; | |
567 | ||
568 | /* | |
569 | * The issued Read Backward or Read Previous command is not | |
570 | * supported by the device | |
571 | * The recovery action should be to issue another command: | |
572 | * Read Revious: if Read Backward is not supported | |
573 | * Read Backward: if Read Previous is not supported | |
574 | */ | |
575 | data = device->discdata; | |
576 | if (data->read_back_op == READ_PREVIOUS) { | |
577 | DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", | |
578 | device->cdev_id); | |
579 | data->read_back_op = READ_BACKWARD; | |
580 | } else { | |
581 | DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", | |
582 | device->cdev_id); | |
583 | data->read_back_op = READ_PREVIOUS; | |
584 | } | |
585 | tape_3590_read_opposite(device, request); | |
586 | return tape_3590_erp_retry(device, request, irb); | |
587 | } | |
588 | ||
589 | /* | |
590 | * Error Recovery read opposite | |
591 | */ | |
592 | static int | |
593 | tape_3590_erp_read_opposite(struct tape_device *device, | |
594 | struct tape_request *request, struct irb *irb) | |
595 | { | |
596 | switch (request->op) { | |
597 | case TO_RFO: | |
598 | /* | |
599 | * We did read forward, but the data could not be read. | |
600 | * We will read backward and then skip forward again. | |
601 | */ | |
602 | tape_3590_read_opposite(device, request); | |
603 | return tape_3590_erp_retry(device, request, irb); | |
604 | case TO_RBA: | |
605 | /* We tried to read forward and backward, but hat no success */ | |
606 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
607 | break; | |
608 | default: | |
609 | PRINT_WARN("read_opposite_recovery_called_with_op: %s\n", | |
610 | tape_op_verbose[request->op]); | |
611 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
612 | } | |
613 | } | |
614 | ||
615 | /* | |
616 | * Print an MIM (Media Information Message) (message code f0) | |
617 | */ | |
618 | static void | |
619 | tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) | |
620 | { | |
621 | struct tape_3590_sense *sense; | |
622 | ||
623 | sense = (struct tape_3590_sense *) irb->ecw; | |
624 | /* Exception Message */ | |
625 | switch (sense->fmt.f70.emc) { | |
626 | case 0x02: | |
627 | PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id); | |
628 | break; | |
629 | case 0x03: | |
630 | PRINT_WARN("(%s): Data degraded in partion %i\n", | |
631 | device->cdev->dev.bus_id, sense->fmt.f70.mp); | |
632 | break; | |
633 | case 0x04: | |
634 | PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id); | |
635 | break; | |
636 | case 0x05: | |
637 | PRINT_WARN("(%s): Medium degraded in partition %i\n", | |
638 | device->cdev->dev.bus_id, sense->fmt.f70.mp); | |
639 | break; | |
640 | case 0x06: | |
641 | PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id); | |
642 | break; | |
643 | case 0x07: | |
644 | PRINT_WARN("(%s): Medium Exception 0x%02x\n", | |
645 | device->cdev->dev.bus_id, sense->fmt.f70.md); | |
646 | break; | |
647 | default: | |
648 | PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n", | |
649 | device->cdev->dev.bus_id, sense->fmt.f70.emc); | |
650 | break; | |
651 | } | |
652 | /* Service Message */ | |
653 | switch (sense->fmt.f70.smc) { | |
654 | case 0x02: | |
655 | PRINT_WARN("(%s): Reference Media maintenance procedure %i\n", | |
656 | device->cdev->dev.bus_id, sense->fmt.f70.md); | |
657 | break; | |
658 | default: | |
659 | PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n", | |
660 | device->cdev->dev.bus_id, sense->fmt.f70.smc); | |
661 | break; | |
662 | } | |
663 | } | |
664 | ||
665 | /* | |
666 | * Print an I/O Subsystem Service Information Message (message code f1) | |
667 | */ | |
668 | static void | |
669 | tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) | |
670 | { | |
671 | struct tape_3590_sense *sense; | |
672 | ||
673 | sense = (struct tape_3590_sense *) irb->ecw; | |
674 | /* Exception Message */ | |
675 | switch (sense->fmt.f71.emc) { | |
676 | case 0x01: | |
677 | PRINT_WARN("(%s): Effect of failure is unknown\n", | |
678 | device->cdev->dev.bus_id); | |
679 | break; | |
680 | case 0x02: | |
681 | PRINT_WARN("(%s): CU Exception - no performance impact\n", | |
682 | device->cdev->dev.bus_id); | |
683 | break; | |
684 | case 0x03: | |
685 | PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n", | |
686 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
687 | break; | |
688 | case 0x04: | |
689 | PRINT_WARN("(%s): CU Exception on device path 0x%02x\n", | |
690 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
691 | break; | |
692 | case 0x05: | |
693 | PRINT_WARN("(%s): CU Exception on library path 0x%02x\n", | |
694 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
695 | break; | |
696 | case 0x06: | |
697 | PRINT_WARN("(%s): CU Exception on node 0x%02x\n", | |
698 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
699 | break; | |
700 | case 0x07: | |
701 | PRINT_WARN("(%s): CU Exception on partition 0x%02x\n", | |
702 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
703 | break; | |
704 | default: | |
705 | PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n", | |
706 | device->cdev->dev.bus_id, sense->fmt.f71.emc); | |
707 | } | |
708 | /* Service Message */ | |
709 | switch (sense->fmt.f71.smc) { | |
710 | case 0x01: | |
711 | PRINT_WARN("(%s): Repair impact is unknown\n", | |
712 | device->cdev->dev.bus_id); | |
713 | break; | |
714 | case 0x02: | |
715 | PRINT_WARN("(%s): Repair will not impact cu performance\n", | |
716 | device->cdev->dev.bus_id); | |
717 | break; | |
718 | case 0x03: | |
719 | if (sense->fmt.f71.mdf == 0) | |
720 | PRINT_WARN("(%s): Repair will disable node " | |
721 | "0x%x on CU\n", | |
722 | device->cdev->dev.bus_id, | |
723 | sense->fmt.f71.md[1]); | |
724 | else | |
725 | PRINT_WARN("(%s): Repair will disable nodes " | |
726 | "(0x%x-0x%x) on CU\n", | |
727 | device->cdev->dev.bus_id, | |
728 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
729 | break; | |
730 | case 0x04: | |
731 | if (sense->fmt.f71.mdf == 0) | |
732 | PRINT_WARN("(%s): Repair will disable cannel path " | |
733 | "0x%x on CU\n", | |
734 | device->cdev->dev.bus_id, | |
735 | sense->fmt.f71.md[1]); | |
736 | else | |
737 | PRINT_WARN("(%s): Repair will disable cannel paths " | |
738 | "(0x%x-0x%x) on CU\n", | |
739 | device->cdev->dev.bus_id, | |
740 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
741 | break; | |
742 | case 0x05: | |
743 | if (sense->fmt.f71.mdf == 0) | |
744 | PRINT_WARN("(%s): Repair will disable device path " | |
745 | "0x%x on CU\n", | |
746 | device->cdev->dev.bus_id, | |
747 | sense->fmt.f71.md[1]); | |
748 | else | |
749 | PRINT_WARN("(%s): Repair will disable device paths " | |
750 | "(0x%x-0x%x) on CU\n", | |
751 | device->cdev->dev.bus_id, | |
752 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
753 | break; | |
754 | case 0x06: | |
755 | if (sense->fmt.f71.mdf == 0) | |
756 | PRINT_WARN("(%s): Repair will disable library path " | |
757 | "0x%x on CU\n", | |
758 | device->cdev->dev.bus_id, | |
759 | sense->fmt.f71.md[1]); | |
760 | else | |
761 | PRINT_WARN("(%s): Repair will disable library paths " | |
762 | "(0x%x-0x%x) on CU\n", | |
763 | device->cdev->dev.bus_id, | |
764 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
765 | break; | |
766 | case 0x07: | |
767 | PRINT_WARN("(%s): Repair will disable access to CU\n", | |
768 | device->cdev->dev.bus_id); | |
769 | break; | |
770 | default: | |
771 | PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n", | |
772 | device->cdev->dev.bus_id, sense->fmt.f71.smc); | |
773 | } | |
774 | } | |
775 | ||
776 | /* | |
777 | * Print an Device Subsystem Service Information Message (message code f2) | |
778 | */ | |
779 | static void | |
780 | tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) | |
781 | { | |
782 | struct tape_3590_sense *sense; | |
783 | ||
784 | sense = (struct tape_3590_sense *) irb->ecw; | |
785 | /* Exception Message */ | |
786 | switch (sense->fmt.f71.emc) { | |
787 | case 0x01: | |
788 | PRINT_WARN("(%s): Effect of failure is unknown\n", | |
789 | device->cdev->dev.bus_id); | |
790 | break; | |
791 | case 0x02: | |
792 | PRINT_WARN("(%s): DV Exception - no performance impact\n", | |
793 | device->cdev->dev.bus_id); | |
794 | break; | |
795 | case 0x03: | |
796 | PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n", | |
797 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
798 | break; | |
799 | case 0x04: | |
800 | PRINT_WARN("(%s): DV Exception on loader 0x%02x\n", | |
801 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
802 | break; | |
803 | case 0x05: | |
804 | PRINT_WARN("(%s): DV Exception on message display 0x%02x\n", | |
805 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
806 | break; | |
807 | case 0x06: | |
808 | PRINT_WARN("(%s): DV Exception in tape path\n", | |
809 | device->cdev->dev.bus_id); | |
810 | break; | |
811 | case 0x07: | |
812 | PRINT_WARN("(%s): DV Exception in drive\n", | |
813 | device->cdev->dev.bus_id); | |
814 | break; | |
815 | default: | |
816 | PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n", | |
817 | device->cdev->dev.bus_id, sense->fmt.f71.emc); | |
818 | } | |
819 | /* Service Message */ | |
820 | switch (sense->fmt.f71.smc) { | |
821 | case 0x01: | |
822 | PRINT_WARN("(%s): Repair impact is unknown\n", | |
823 | device->cdev->dev.bus_id); | |
824 | break; | |
825 | case 0x02: | |
826 | PRINT_WARN("(%s): Repair will not impact device performance\n", | |
827 | device->cdev->dev.bus_id); | |
828 | break; | |
829 | case 0x03: | |
830 | if (sense->fmt.f71.mdf == 0) | |
831 | PRINT_WARN("(%s): Repair will disable channel path " | |
832 | "0x%x on DV\n", | |
833 | device->cdev->dev.bus_id, | |
834 | sense->fmt.f71.md[1]); | |
835 | else | |
836 | PRINT_WARN("(%s): Repair will disable channel path " | |
837 | "(0x%x-0x%x) on DV\n", | |
838 | device->cdev->dev.bus_id, | |
839 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
840 | break; | |
841 | case 0x04: | |
842 | if (sense->fmt.f71.mdf == 0) | |
843 | PRINT_WARN("(%s): Repair will disable interface 0x%x " | |
844 | "on DV\n", | |
845 | device->cdev->dev.bus_id, | |
846 | sense->fmt.f71.md[1]); | |
847 | else | |
848 | PRINT_WARN("(%s): Repair will disable interfaces " | |
849 | "(0x%x-0x%x) on DV\n", | |
850 | device->cdev->dev.bus_id, | |
851 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
852 | break; | |
853 | case 0x05: | |
854 | if (sense->fmt.f71.mdf == 0) | |
855 | PRINT_WARN("(%s): Repair will disable loader 0x%x " | |
856 | "on DV\n", | |
857 | device->cdev->dev.bus_id, | |
858 | sense->fmt.f71.md[1]); | |
859 | else | |
860 | PRINT_WARN("(%s): Repair will disable loader " | |
861 | "(0x%x-0x%x) on DV\n", | |
862 | device->cdev->dev.bus_id, | |
863 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
864 | break; | |
865 | case 0x07: | |
866 | PRINT_WARN("(%s): Repair will disable access to DV\n", | |
867 | device->cdev->dev.bus_id); | |
868 | break; | |
869 | case 0x08: | |
870 | if (sense->fmt.f71.mdf == 0) | |
871 | PRINT_WARN("(%s): Repair will disable message " | |
872 | "display 0x%x on DV\n", | |
873 | device->cdev->dev.bus_id, | |
874 | sense->fmt.f71.md[1]); | |
875 | else | |
876 | PRINT_WARN("(%s): Repair will disable message " | |
877 | "displays (0x%x-0x%x) on DV\n", | |
878 | device->cdev->dev.bus_id, | |
879 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
880 | break; | |
881 | case 0x09: | |
882 | PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id); | |
883 | break; | |
884 | default: | |
885 | PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n", | |
886 | device->cdev->dev.bus_id, sense->fmt.f71.smc); | |
887 | } | |
888 | } | |
889 | ||
890 | /* | |
891 | * Print standard ERA Message | |
892 | */ | |
893 | static void | |
894 | tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) | |
895 | { | |
896 | struct tape_3590_sense *sense; | |
897 | ||
898 | sense = (struct tape_3590_sense *) irb->ecw; | |
899 | if (sense->mc == 0) | |
900 | return; | |
901 | if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { | |
902 | if (tape_3590_msg[sense->mc] != NULL) | |
903 | PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id, | |
904 | tape_3590_msg[sense->mc]); | |
905 | else { | |
906 | PRINT_WARN("(%s): Message Code 0x%x\n", | |
907 | device->cdev->dev.bus_id, sense->mc); | |
908 | } | |
909 | return; | |
910 | } | |
911 | if (sense->mc == 0xf0) { | |
912 | /* Standard Media Information Message */ | |
913 | PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, " | |
914 | "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id, | |
915 | sense->fmt.f70.sev, sense->mc, | |
916 | sense->fmt.f70.emc, sense->fmt.f70.smc, | |
917 | sense->fmt.f70.refcode, sense->fmt.f70.mid, | |
918 | sense->fmt.f70.fid); | |
919 | tape_3590_print_mim_msg_f0(device, irb); | |
920 | return; | |
921 | } | |
922 | if (sense->mc == 0xf1) { | |
923 | /* Standard I/O Subsystem Service Information Message */ | |
924 | PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, " | |
925 | "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", | |
926 | device->cdev->dev.bus_id, sense->fmt.f71.sev, | |
927 | device->cdev->id.dev_model, | |
928 | sense->mc, sense->fmt.f71.emc, | |
929 | sense->fmt.f71.smc, sense->fmt.f71.refcode1, | |
930 | sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); | |
931 | tape_3590_print_io_sim_msg_f1(device, irb); | |
932 | return; | |
933 | } | |
934 | if (sense->mc == 0xf2) { | |
935 | /* Standard Device Service Information Message */ | |
936 | PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, " | |
937 | "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", | |
938 | device->cdev->dev.bus_id, sense->fmt.f71.sev, | |
939 | device->cdev->id.dev_model, | |
940 | sense->mc, sense->fmt.f71.emc, | |
941 | sense->fmt.f71.smc, sense->fmt.f71.refcode1, | |
942 | sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); | |
943 | tape_3590_print_dev_sim_msg_f2(device, irb); | |
944 | return; | |
945 | } | |
946 | if (sense->mc == 0xf3) { | |
947 | /* Standard Library Service Information Message */ | |
948 | return; | |
949 | } | |
950 | PRINT_WARN("(%s): Device Message(%x)\n", | |
951 | device->cdev->dev.bus_id, sense->mc); | |
952 | } | |
953 | ||
954 | /* | |
955 | * 3590 error Recovery routine: | |
956 | * If possible, it tries to recover from the error. If this is not possible, | |
957 | * inform the user about the problem. | |
958 | */ | |
959 | static int | |
960 | tape_3590_unit_check(struct tape_device *device, struct tape_request *request, | |
961 | struct irb *irb) | |
962 | { | |
963 | struct tape_3590_sense *sense; | |
964 | int rc; | |
965 | ||
966 | #ifdef CONFIG_S390_TAPE_BLOCK | |
967 | if (request->op == TO_BLOCK) { | |
968 | /* | |
969 | * Recovery for block device requests. Set the block_position | |
970 | * to something invalid and retry. | |
971 | */ | |
972 | device->blk_data.block_position = -1; | |
973 | if (request->retries-- <= 0) | |
974 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
975 | else | |
976 | return tape_3590_erp_retry(device, request, irb); | |
977 | } | |
978 | #endif | |
979 | ||
980 | sense = (struct tape_3590_sense *) irb->ecw; | |
981 | ||
982 | /* | |
983 | * First check all RC-QRCs where we want to do something special | |
984 | * - "break": basic error recovery is done | |
985 | * - "goto out:": just print error message if available | |
986 | */ | |
987 | rc = -EIO; | |
988 | switch (sense->rc_rqc) { | |
989 | ||
990 | case 0x1110: | |
991 | tape_3590_print_era_msg(device, irb); | |
992 | return tape_3590_erp_read_buf_log(device, request, irb); | |
993 | ||
994 | case 0x2011: | |
995 | tape_3590_print_era_msg(device, irb); | |
996 | return tape_3590_erp_read_alternate(device, request, irb); | |
997 | ||
998 | case 0x2230: | |
999 | case 0x2231: | |
1000 | tape_3590_print_era_msg(device, irb); | |
1001 | return tape_3590_erp_special_interrupt(device, request, irb); | |
1002 | ||
1003 | case 0x3010: | |
1004 | DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", | |
1005 | device->cdev_id); | |
1006 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1007 | case 0x3012: | |
1008 | DBF_EVENT(2, "(%08x): Forward at End of Partition\n", | |
1009 | device->cdev_id); | |
1010 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1011 | case 0x3020: | |
1012 | DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); | |
1013 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1014 | ||
1015 | case 0x3122: | |
1016 | DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", | |
1017 | device->cdev_id); | |
1018 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1019 | case 0x3123: | |
1020 | DBF_EVENT(2, "(%08x): Rewind Unload complete\n", | |
1021 | device->cdev_id); | |
1022 | tape_med_state_set(device, MS_UNLOADED); | |
1023 | return tape_3590_erp_basic(device, request, irb, 0); | |
1024 | ||
1025 | case 0x4010: | |
1026 | /* | |
1027 | * print additional msg since default msg | |
1028 | * "device intervention" is not very meaningfull | |
1029 | */ | |
1030 | PRINT_WARN("(%s): Tape operation when medium not loaded\n", | |
1031 | device->cdev->dev.bus_id); | |
1032 | tape_med_state_set(device, MS_UNLOADED); | |
1033 | return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); | |
1034 | case 0x4012: /* Device Long Busy */ | |
1035 | tape_3590_print_era_msg(device, irb); | |
1036 | return tape_3590_erp_long_busy(device, request, irb); | |
1037 | ||
1038 | case 0x5010: | |
1039 | if (sense->rac == 0xd0) { | |
1040 | /* Swap */ | |
1041 | tape_3590_print_era_msg(device, irb); | |
1042 | return tape_3590_erp_swap(device, request, irb); | |
1043 | } | |
1044 | if (sense->rac == 0x26) { | |
1045 | /* Read Opposite */ | |
1046 | tape_3590_print_era_msg(device, irb); | |
1047 | return tape_3590_erp_read_opposite(device, request, | |
1048 | irb); | |
1049 | } | |
1050 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1051 | case 0x5020: | |
1052 | case 0x5021: | |
1053 | case 0x5022: | |
1054 | case 0x5040: | |
1055 | case 0x5041: | |
1056 | case 0x5042: | |
1057 | tape_3590_print_era_msg(device, irb); | |
1058 | return tape_3590_erp_swap(device, request, irb); | |
1059 | ||
1060 | case 0x5110: | |
1061 | case 0x5111: | |
1062 | return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); | |
1063 | ||
1064 | case 0x5120: | |
1065 | case 0x1120: | |
1066 | tape_med_state_set(device, MS_UNLOADED); | |
1067 | return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); | |
1068 | ||
1069 | case 0x6020: | |
1070 | PRINT_WARN("(%s): Cartridge of wrong type ?\n", | |
1071 | device->cdev->dev.bus_id); | |
1072 | return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); | |
1073 | ||
1074 | case 0x8011: | |
1075 | PRINT_WARN("(%s): Another host has reserved the tape device\n", | |
1076 | device->cdev->dev.bus_id); | |
1077 | return tape_3590_erp_basic(device, request, irb, -EPERM); | |
1078 | case 0x8013: | |
1079 | PRINT_WARN("(%s): Another host has priviliged access to the " | |
1080 | "tape device\n", device->cdev->dev.bus_id); | |
1081 | PRINT_WARN("(%s): To solve the problem unload the current " | |
1082 | "cartridge!\n", device->cdev->dev.bus_id); | |
1083 | return tape_3590_erp_basic(device, request, irb, -EPERM); | |
1084 | default: | |
1085 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | /* | |
1090 | * 3590 interrupt handler: | |
1091 | */ | |
1092 | static int | |
1093 | tape_3590_irq(struct tape_device *device, struct tape_request *request, | |
1094 | struct irb *irb) | |
1095 | { | |
1096 | if (request == NULL) | |
1097 | return tape_3590_unsolicited_irq(device, irb); | |
1098 | ||
1099 | if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) && | |
1100 | (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) { | |
1101 | /* Write at end of volume */ | |
1102 | DBF_EVENT(2, "End of volume\n"); | |
1103 | return tape_3590_erp_failed(device, request, irb, -ENOSPC); | |
1104 | } | |
1105 | ||
1106 | if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) | |
1107 | return tape_3590_unit_check(device, request, irb); | |
1108 | ||
1109 | if (irb->scsw.dstat & DEV_STAT_DEV_END) { | |
1110 | if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) { | |
1111 | if (request->op == TO_FSB || request->op == TO_BSB) | |
1112 | request->rescnt++; | |
1113 | else | |
1114 | DBF_EVENT(5, "Unit Exception!\n"); | |
1115 | } | |
1116 | ||
1117 | return tape_3590_done(device, request); | |
1118 | } | |
1119 | ||
1120 | if (irb->scsw.dstat & DEV_STAT_CHN_END) { | |
1121 | DBF_EVENT(2, "cannel end\n"); | |
1122 | return TAPE_IO_PENDING; | |
1123 | } | |
1124 | ||
1125 | if (irb->scsw.dstat & DEV_STAT_ATTENTION) { | |
1126 | DBF_EVENT(2, "Unit Attention when busy..\n"); | |
1127 | return TAPE_IO_PENDING; | |
1128 | } | |
1129 | ||
1130 | DBF_EVENT(6, "xunknownirq\n"); | |
1131 | PRINT_ERR("Unexpected interrupt.\n"); | |
1132 | PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]); | |
1133 | tape_dump_sense(device, request, irb); | |
1134 | return TAPE_IO_STOP; | |
1135 | } | |
1136 | ||
1137 | /* | |
1138 | * Setup device function | |
1139 | */ | |
1140 | static int | |
1141 | tape_3590_setup_device(struct tape_device *device) | |
1142 | { | |
1143 | int rc; | |
1144 | struct tape_3590_disc_data *data; | |
1145 | ||
1146 | DBF_EVENT(6, "3590 device setup\n"); | |
1147 | data = kmalloc(sizeof(struct tape_3590_disc_data), | |
1148 | GFP_KERNEL | GFP_DMA); | |
1149 | if (data == NULL) | |
1150 | return -ENOMEM; | |
1151 | data->read_back_op = READ_PREVIOUS; | |
1152 | device->discdata = data; | |
1153 | ||
1154 | if ((rc = tape_std_assign(device)) == 0) { | |
1155 | /* Try to find out if medium is loaded */ | |
1156 | if ((rc = tape_3590_sense_medium(device)) != 0) | |
1157 | DBF_LH(3, "3590 medium sense returned %d\n", rc); | |
1158 | } | |
1159 | ||
1160 | return rc; | |
1161 | } | |
1162 | ||
1163 | /* | |
1164 | * Cleanup device function | |
1165 | */ | |
1166 | static void | |
1167 | tape_3590_cleanup_device(struct tape_device *device) | |
1168 | { | |
2cc924b8 | 1169 | flush_scheduled_work(); |
b6cba4ee SB |
1170 | tape_std_unassign(device); |
1171 | ||
1172 | kfree(device->discdata); | |
1173 | device->discdata = NULL; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * List of 3590 magnetic tape commands. | |
1178 | */ | |
1179 | static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { | |
1180 | [MTRESET] = tape_std_mtreset, | |
1181 | [MTFSF] = tape_std_mtfsf, | |
1182 | [MTBSF] = tape_std_mtbsf, | |
1183 | [MTFSR] = tape_std_mtfsr, | |
1184 | [MTBSR] = tape_std_mtbsr, | |
1185 | [MTWEOF] = tape_std_mtweof, | |
1186 | [MTREW] = tape_std_mtrew, | |
1187 | [MTOFFL] = tape_std_mtoffl, | |
1188 | [MTNOP] = tape_std_mtnop, | |
1189 | [MTRETEN] = tape_std_mtreten, | |
1190 | [MTBSFM] = tape_std_mtbsfm, | |
1191 | [MTFSFM] = tape_std_mtfsfm, | |
1192 | [MTEOM] = tape_std_mteom, | |
1193 | [MTERASE] = tape_std_mterase, | |
1194 | [MTRAS1] = NULL, | |
1195 | [MTRAS2] = NULL, | |
1196 | [MTRAS3] = NULL, | |
1197 | [MTSETBLK] = tape_std_mtsetblk, | |
1198 | [MTSETDENSITY] = NULL, | |
1199 | [MTSEEK] = tape_3590_mtseek, | |
1200 | [MTTELL] = tape_3590_mttell, | |
1201 | [MTSETDRVBUFFER] = NULL, | |
1202 | [MTFSS] = NULL, | |
1203 | [MTBSS] = NULL, | |
1204 | [MTWSM] = NULL, | |
1205 | [MTLOCK] = NULL, | |
1206 | [MTUNLOCK] = NULL, | |
1207 | [MTLOAD] = tape_std_mtload, | |
1208 | [MTUNLOAD] = tape_std_mtunload, | |
1209 | [MTCOMPRESSION] = tape_std_mtcompression, | |
1210 | [MTSETPART] = NULL, | |
1211 | [MTMKPART] = NULL | |
1212 | }; | |
1213 | ||
1214 | /* | |
1215 | * Tape discipline structure for 3590. | |
1216 | */ | |
1217 | static struct tape_discipline tape_discipline_3590 = { | |
1218 | .owner = THIS_MODULE, | |
1219 | .setup_device = tape_3590_setup_device, | |
1220 | .cleanup_device = tape_3590_cleanup_device, | |
1221 | .process_eov = tape_std_process_eov, | |
1222 | .irq = tape_3590_irq, | |
1223 | .read_block = tape_std_read_block, | |
1224 | .write_block = tape_std_write_block, | |
1225 | #ifdef CONFIG_S390_TAPE_BLOCK | |
1226 | .bread = tape_3590_bread, | |
1227 | .free_bread = tape_3590_free_bread, | |
1228 | .check_locate = tape_3590_check_locate, | |
1229 | #endif | |
1230 | .ioctl_fn = tape_3590_ioctl, | |
1231 | .mtop_array = tape_3590_mtop | |
1232 | }; | |
1233 | ||
1234 | static struct ccw_device_id tape_3590_ids[] = { | |
1235 | {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, | |
2cc924b8 | 1236 | {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, |
b6cba4ee SB |
1237 | { /* end of list */ } |
1238 | }; | |
1239 | ||
1240 | static int | |
1241 | tape_3590_online(struct ccw_device *cdev) | |
1242 | { | |
1243 | return tape_generic_online(cdev->dev.driver_data, | |
1244 | &tape_discipline_3590); | |
1245 | } | |
1246 | ||
1247 | static int | |
1248 | tape_3590_offline(struct ccw_device *cdev) | |
1249 | { | |
1250 | return tape_generic_offline(cdev->dev.driver_data); | |
1251 | } | |
1252 | ||
1253 | static struct ccw_driver tape_3590_driver = { | |
1254 | .name = "tape_3590", | |
1255 | .owner = THIS_MODULE, | |
1256 | .ids = tape_3590_ids, | |
1257 | .probe = tape_generic_probe, | |
1258 | .remove = tape_generic_remove, | |
1259 | .set_offline = tape_3590_offline, | |
1260 | .set_online = tape_3590_online, | |
1261 | }; | |
1262 | ||
1263 | /* | |
1264 | * Setup discipline structure. | |
1265 | */ | |
1266 | static int | |
1267 | tape_3590_init(void) | |
1268 | { | |
1269 | int rc; | |
1270 | ||
1271 | TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); | |
1272 | debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); | |
1273 | #ifdef DBF_LIKE_HELL | |
1274 | debug_set_level(TAPE_DBF_AREA, 6); | |
1275 | #endif | |
1276 | ||
1277 | DBF_EVENT(3, "3590 init\n"); | |
1278 | /* Register driver for 3590 tapes. */ | |
1279 | rc = ccw_driver_register(&tape_3590_driver); | |
1280 | if (rc) | |
1281 | DBF_EVENT(3, "3590 init failed\n"); | |
1282 | else | |
1283 | DBF_EVENT(3, "3590 registered\n"); | |
1284 | return rc; | |
1285 | } | |
1286 | ||
1287 | static void | |
1288 | tape_3590_exit(void) | |
1289 | { | |
1290 | ccw_driver_unregister(&tape_3590_driver); | |
1291 | ||
1292 | debug_unregister(TAPE_DBF_AREA); | |
1293 | } | |
1294 | ||
1295 | MODULE_DEVICE_TABLE(ccw, tape_3590_ids); | |
1296 | MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); | |
1297 | MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); | |
1298 | MODULE_LICENSE("GPL"); | |
1299 | ||
1300 | module_init(tape_3590_init); | |
1301 | module_exit(tape_3590_exit); |