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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 | ||
11 | #include <linux/config.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/bio.h> | |
15 | ||
16 | #define TAPE_DBF_AREA tape_3590_dbf | |
17 | ||
18 | #include "tape.h" | |
19 | #include "tape_std.h" | |
20 | #include "tape_3590.h" | |
21 | ||
22 | /* | |
23 | * Pointer to debug area. | |
24 | */ | |
25 | debug_info_t *TAPE_DBF_AREA = NULL; | |
26 | EXPORT_SYMBOL(TAPE_DBF_AREA); | |
27 | ||
28 | /******************************************************************* | |
29 | * Error Recovery fuctions: | |
30 | * - Read Opposite: implemented | |
31 | * - Read Device (buffered) log: BRA | |
32 | * - Read Library log: BRA | |
33 | * - Swap Devices: BRA | |
34 | * - Long Busy: BRA | |
35 | * - Special Intercept: BRA | |
36 | * - Read Alternate: implemented | |
37 | *******************************************************************/ | |
38 | ||
39 | #define PRINTK_HEADER "TAPE_3590: " | |
40 | ||
41 | static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { | |
42 | [0x00] = "", | |
43 | [0x10] = "Lost Sense", | |
44 | [0x11] = "Assigned Elsewhere", | |
45 | [0x12] = "Allegiance Reset", | |
46 | [0x13] = "Shared Access Violation", | |
47 | [0x20] = "Command Reject", | |
48 | [0x21] = "Configuration Error", | |
49 | [0x22] = "Protection Exception", | |
50 | [0x23] = "Write Protect", | |
51 | [0x24] = "Write Length", | |
52 | [0x25] = "Read-Only Format", | |
53 | [0x31] = "Beginning of Partition", | |
54 | [0x33] = "End of Partition", | |
55 | [0x34] = "End of Data", | |
56 | [0x35] = "Block not found", | |
57 | [0x40] = "Device Intervention", | |
58 | [0x41] = "Loader Intervention", | |
59 | [0x42] = "Library Intervention", | |
60 | [0x50] = "Write Error", | |
61 | [0x51] = "Erase Error", | |
62 | [0x52] = "Formatting Error", | |
63 | [0x53] = "Read Error", | |
64 | [0x54] = "Unsupported Format", | |
65 | [0x55] = "No Formatting", | |
66 | [0x56] = "Positioning lost", | |
67 | [0x57] = "Read Length", | |
68 | [0x60] = "Unsupported Medium", | |
69 | [0x61] = "Medium Length Error", | |
70 | [0x62] = "Medium removed", | |
71 | [0x64] = "Load Check", | |
72 | [0x65] = "Unload Check", | |
73 | [0x70] = "Equipment Check", | |
74 | [0x71] = "Bus out Check", | |
75 | [0x72] = "Protocol Error", | |
76 | [0x73] = "Interface Error", | |
77 | [0x74] = "Overrun", | |
78 | [0x75] = "Halt Signal", | |
79 | [0x90] = "Device fenced", | |
80 | [0x91] = "Device Path fenced", | |
81 | [0xa0] = "Volume misplaced", | |
82 | [0xa1] = "Volume inaccessible", | |
83 | [0xa2] = "Volume in input", | |
84 | [0xa3] = "Volume ejected", | |
85 | [0xa4] = "All categories reserved", | |
86 | [0xa5] = "Duplicate Volume", | |
87 | [0xa6] = "Library Manager Offline", | |
88 | [0xa7] = "Library Output Station full", | |
89 | [0xa8] = "Vision System non-operational", | |
90 | [0xa9] = "Library Manager Equipment Check", | |
91 | [0xaa] = "Library Equipment Check", | |
92 | [0xab] = "All Library Cells full", | |
93 | [0xac] = "No Cleaner Volumes in Library", | |
94 | [0xad] = "I/O Station door open", | |
95 | [0xae] = "Subsystem environmental alert", | |
96 | }; | |
97 | ||
98 | /* | |
99 | * 3590 IOCTL Overload | |
100 | */ | |
101 | static int | |
102 | tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) | |
103 | { | |
104 | switch (cmd) { | |
105 | case TAPE390_DISPLAY: { | |
106 | struct display_struct disp; | |
107 | ||
108 | if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) | |
109 | return -EFAULT; | |
110 | ||
111 | return tape_std_display(device, &disp); | |
112 | } | |
113 | default: | |
114 | return -EINVAL; /* no additional ioctls */ | |
115 | } | |
116 | } | |
117 | ||
118 | /* | |
119 | * SENSE Medium: Get Sense data about medium state | |
120 | */ | |
121 | static int | |
122 | tape_3590_sense_medium(struct tape_device *device) | |
123 | { | |
124 | struct tape_request *request; | |
125 | ||
126 | request = tape_alloc_request(1, 128); | |
127 | if (IS_ERR(request)) | |
128 | return PTR_ERR(request); | |
129 | request->op = TO_MSEN; | |
130 | tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); | |
131 | return tape_do_io_free(device, request); | |
132 | } | |
133 | ||
134 | /* | |
135 | * MTTELL: Tell block. Return the number of block relative to current file. | |
136 | */ | |
137 | static int | |
138 | tape_3590_mttell(struct tape_device *device, int mt_count) | |
139 | { | |
140 | __u64 block_id; | |
141 | int rc; | |
142 | ||
143 | rc = tape_std_read_block_id(device, &block_id); | |
144 | if (rc) | |
145 | return rc; | |
146 | return block_id >> 32; | |
147 | } | |
148 | ||
149 | /* | |
150 | * MTSEEK: seek to the specified block. | |
151 | */ | |
152 | static int | |
153 | tape_3590_mtseek(struct tape_device *device, int count) | |
154 | { | |
155 | struct tape_request *request; | |
156 | ||
157 | DBF_EVENT(6, "xsee id: %x\n", count); | |
158 | request = tape_alloc_request(3, 4); | |
159 | if (IS_ERR(request)) | |
160 | return PTR_ERR(request); | |
161 | request->op = TO_LBL; | |
162 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
163 | *(__u32 *) request->cpdata = count; | |
164 | tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); | |
165 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
166 | return tape_do_io_free(device, request); | |
167 | } | |
168 | ||
169 | /* | |
170 | * Read Opposite Error Recovery Function: | |
171 | * Used, when Read Forward does not work | |
172 | */ | |
173 | static void | |
174 | tape_3590_read_opposite(struct tape_device *device, | |
175 | struct tape_request *request) | |
176 | { | |
177 | struct tape_3590_disc_data *data; | |
178 | ||
179 | /* | |
180 | * We have allocated 4 ccws in tape_std_read, so we can now | |
181 | * transform the request to a read backward, followed by a | |
182 | * forward space block. | |
183 | */ | |
184 | request->op = TO_RBA; | |
185 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
186 | data = device->discdata; | |
187 | tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, | |
188 | device->char_data.idal_buf); | |
189 | tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); | |
190 | tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); | |
191 | DBF_EVENT(6, "xrop ccwg\n"); | |
192 | } | |
193 | ||
194 | /* | |
195 | * Read Attention Msg | |
196 | * This should be done after an interrupt with attention bit (0x80) | |
197 | * in device state. | |
198 | * | |
199 | * After a "read attention message" request there are two possible | |
200 | * results: | |
201 | * | |
202 | * 1. A unit check is presented, when attention sense is present (e.g. when | |
203 | * a medium has been unloaded). The attention sense comes then | |
204 | * together with the unit check. The recovery action is either "retry" | |
205 | * (in case there is an attention message pending) or "permanent error". | |
206 | * | |
207 | * 2. The attention msg is written to the "read subsystem data" buffer. | |
208 | * In this case we probably should print it to the console. | |
209 | */ | |
210 | static int | |
211 | tape_3590_read_attmsg(struct tape_device *device) | |
212 | { | |
213 | struct tape_request *request; | |
214 | char *buf; | |
215 | ||
216 | request = tape_alloc_request(3, 4096); | |
217 | if (IS_ERR(request)) | |
218 | return PTR_ERR(request); | |
219 | request->op = TO_READ_ATTMSG; | |
220 | buf = request->cpdata; | |
221 | buf[0] = PREP_RD_SS_DATA; | |
222 | buf[6] = RD_ATTMSG; /* read att msg */ | |
223 | tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); | |
224 | tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); | |
225 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
226 | return tape_do_io_free(device, request); | |
227 | } | |
228 | ||
229 | /* | |
230 | * These functions are used to schedule follow-up actions from within an | |
231 | * interrupt context (like unsolicited interrupts). | |
232 | */ | |
233 | static void | |
234 | tape_3590_work_handler(void *data) | |
235 | { | |
236 | struct { | |
237 | struct tape_device *device; | |
238 | enum tape_op op; | |
239 | struct work_struct work; | |
240 | } *p = data; | |
241 | ||
242 | switch (p->op) { | |
243 | case TO_MSEN: | |
244 | tape_3590_sense_medium(p->device); | |
245 | break; | |
246 | case TO_READ_ATTMSG: | |
247 | tape_3590_read_attmsg(p->device); | |
248 | break; | |
249 | default: | |
250 | DBF_EVENT(3, "T3590: work handler undefined for " | |
251 | "operation 0x%02x\n", p->op); | |
252 | } | |
253 | tape_put_device(p->device); | |
254 | kfree(p); | |
255 | } | |
256 | ||
257 | static int | |
258 | tape_3590_schedule_work(struct tape_device *device, enum tape_op op) | |
259 | { | |
260 | struct { | |
261 | struct tape_device *device; | |
262 | enum tape_op op; | |
263 | struct work_struct work; | |
264 | } *p; | |
265 | ||
266 | if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) | |
267 | return -ENOMEM; | |
268 | ||
269 | INIT_WORK(&p->work, tape_3590_work_handler, p); | |
270 | ||
271 | p->device = tape_get_device_reference(device); | |
272 | p->op = op; | |
273 | ||
274 | schedule_work(&p->work); | |
275 | return 0; | |
276 | } | |
277 | ||
278 | #ifdef CONFIG_S390_TAPE_BLOCK | |
279 | /* | |
280 | * Tape Block READ | |
281 | */ | |
282 | static struct tape_request * | |
283 | tape_3590_bread(struct tape_device *device, struct request *req) | |
284 | { | |
285 | struct tape_request *request; | |
286 | struct ccw1 *ccw; | |
287 | int count = 0, start_block, i; | |
288 | unsigned off; | |
289 | char *dst; | |
290 | struct bio_vec *bv; | |
291 | struct bio *bio; | |
292 | ||
293 | DBF_EVENT(6, "xBREDid:"); | |
294 | start_block = req->sector >> TAPEBLOCK_HSEC_S2B; | |
295 | DBF_EVENT(6, "start_block = %i\n", start_block); | |
296 | ||
297 | rq_for_each_bio(bio, req) { | |
298 | bio_for_each_segment(bv, bio, i) { | |
299 | count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); | |
300 | } | |
301 | } | |
302 | request = tape_alloc_request(2 + count + 1, 4); | |
303 | if (IS_ERR(request)) | |
304 | return request; | |
305 | request->op = TO_BLOCK; | |
306 | *(__u32 *) request->cpdata = start_block; | |
307 | ccw = request->cpaddr; | |
308 | ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); | |
309 | ||
310 | /* | |
311 | * We always setup a nop after the mode set ccw. This slot is | |
312 | * used in tape_std_check_locate to insert a locate ccw if the | |
313 | * current tape position doesn't match the start block to be read. | |
314 | */ | |
315 | ccw = tape_ccw_cc(ccw, NOP, 0, NULL); | |
316 | ||
317 | rq_for_each_bio(bio, req) { | |
318 | bio_for_each_segment(bv, bio, i) { | |
319 | dst = kmap(bv->bv_page) + bv->bv_offset; | |
320 | for (off = 0; off < bv->bv_len; | |
321 | off += TAPEBLOCK_HSEC_SIZE) { | |
322 | ccw->flags = CCW_FLAG_CC; | |
323 | ccw->cmd_code = READ_FORWARD; | |
324 | ccw->count = TAPEBLOCK_HSEC_SIZE; | |
325 | set_normalized_cda(ccw, (void *) __pa(dst)); | |
326 | ccw++; | |
327 | dst += TAPEBLOCK_HSEC_SIZE; | |
328 | } | |
329 | if (off > bv->bv_len) | |
330 | BUG(); | |
331 | } | |
332 | } | |
333 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
334 | DBF_EVENT(6, "xBREDccwg\n"); | |
335 | return request; | |
336 | } | |
337 | ||
338 | static void | |
339 | tape_3590_free_bread(struct tape_request *request) | |
340 | { | |
341 | struct ccw1 *ccw; | |
342 | ||
343 | /* Last ccw is a nop and doesn't need clear_normalized_cda */ | |
344 | for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) | |
345 | if (ccw->cmd_code == READ_FORWARD) | |
346 | clear_normalized_cda(ccw); | |
347 | tape_free_request(request); | |
348 | } | |
349 | ||
350 | /* | |
351 | * check_locate is called just before the tape request is passed to | |
352 | * the common io layer for execution. It has to check the current | |
353 | * tape position and insert a locate ccw if it doesn't match the | |
354 | * start block for the request. | |
355 | */ | |
356 | static void | |
357 | tape_3590_check_locate(struct tape_device *device, struct tape_request *request) | |
358 | { | |
359 | __u32 *start_block; | |
360 | ||
361 | start_block = (__u32 *) request->cpdata; | |
362 | if (*start_block != device->blk_data.block_position) { | |
363 | /* Add the start offset of the file to get the real block. */ | |
364 | *start_block += device->bof; | |
365 | tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); | |
366 | } | |
367 | } | |
368 | #endif | |
369 | ||
370 | /* | |
371 | * The done handler is called at device/channel end and wakes up the sleeping | |
372 | * process | |
373 | */ | |
374 | static int | |
375 | tape_3590_done(struct tape_device *device, struct tape_request *request) | |
376 | { | |
377 | struct tape_3590_med_sense *sense; | |
378 | ||
379 | DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); | |
380 | ||
381 | switch (request->op) { | |
382 | case TO_BSB: | |
383 | case TO_BSF: | |
384 | case TO_DSE: | |
385 | case TO_FSB: | |
386 | case TO_FSF: | |
387 | case TO_LBL: | |
388 | case TO_RFO: | |
389 | case TO_RBA: | |
390 | case TO_REW: | |
391 | case TO_WRI: | |
392 | case TO_WTM: | |
393 | case TO_BLOCK: | |
394 | case TO_LOAD: | |
395 | tape_med_state_set(device, MS_LOADED); | |
396 | break; | |
397 | case TO_RUN: | |
398 | tape_med_state_set(device, MS_UNLOADED); | |
399 | break; | |
400 | case TO_MSEN: | |
401 | sense = (struct tape_3590_med_sense *) request->cpdata; | |
402 | if (sense->masst == MSENSE_UNASSOCIATED) | |
403 | tape_med_state_set(device, MS_UNLOADED); | |
404 | if (sense->masst == MSENSE_ASSOCIATED_MOUNT) | |
405 | tape_med_state_set(device, MS_LOADED); | |
406 | break; | |
407 | case TO_RBI: /* RBI seems to succeed even without medium loaded. */ | |
408 | case TO_NOP: /* Same to NOP. */ | |
409 | case TO_READ_CONFIG: | |
410 | case TO_READ_ATTMSG: | |
411 | case TO_DIS: | |
412 | case TO_ASSIGN: | |
413 | case TO_UNASSIGN: | |
414 | break; | |
415 | case TO_SIZE: | |
416 | break; | |
417 | } | |
418 | return TAPE_IO_SUCCESS; | |
419 | } | |
420 | ||
421 | /* | |
422 | * This fuction is called, when error recovery was successfull | |
423 | */ | |
424 | static inline int | |
425 | tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) | |
426 | { | |
427 | DBF_EVENT(3, "Error Recovery successfull for %s\n", | |
428 | tape_op_verbose[request->op]); | |
429 | return tape_3590_done(device, request); | |
430 | } | |
431 | ||
432 | /* | |
433 | * This fuction is called, when error recovery was not successfull | |
434 | */ | |
435 | static inline int | |
436 | tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, | |
437 | struct irb *irb, int rc) | |
438 | { | |
439 | DBF_EVENT(3, "Error Recovery failed for %s\n", | |
440 | tape_op_verbose[request->op]); | |
441 | tape_dump_sense_dbf(device, request, irb); | |
442 | return rc; | |
443 | } | |
444 | ||
445 | /* | |
446 | * Error Recovery do retry | |
447 | */ | |
448 | static inline int | |
449 | tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, | |
450 | struct irb *irb) | |
451 | { | |
452 | DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); | |
453 | tape_dump_sense_dbf(device, request, irb); | |
454 | return TAPE_IO_RETRY; | |
455 | } | |
456 | ||
457 | /* | |
458 | * Handle unsolicited interrupts | |
459 | */ | |
460 | static int | |
461 | tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) | |
462 | { | |
463 | if (irb->scsw.dstat == DEV_STAT_CHN_END) | |
464 | /* Probably result of halt ssch */ | |
465 | return TAPE_IO_PENDING; | |
466 | else if (irb->scsw.dstat == 0x85) | |
467 | /* Device Ready -> check medium state */ | |
468 | tape_3590_schedule_work(device, TO_MSEN); | |
469 | else if (irb->scsw.dstat & DEV_STAT_ATTENTION) | |
470 | tape_3590_schedule_work(device, TO_READ_ATTMSG); | |
471 | else { | |
472 | DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); | |
473 | PRINT_WARN("Unsolicited IRQ (Device End) caught.\n"); | |
474 | tape_dump_sense(device, NULL, irb); | |
475 | } | |
476 | return TAPE_IO_SUCCESS; | |
477 | } | |
478 | ||
479 | /* | |
480 | * Basic Recovery routine | |
481 | */ | |
482 | static int | |
483 | tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, | |
484 | struct irb *irb, int rc) | |
485 | { | |
486 | struct tape_3590_sense *sense; | |
487 | ||
488 | sense = (struct tape_3590_sense *) irb->ecw; | |
489 | ||
490 | switch (sense->bra) { | |
491 | case SENSE_BRA_PER: | |
492 | return tape_3590_erp_failed(device, request, irb, rc); | |
493 | case SENSE_BRA_CONT: | |
494 | return tape_3590_erp_succeded(device, request); | |
495 | case SENSE_BRA_RE: | |
496 | return tape_3590_erp_retry(device, request, irb); | |
497 | case SENSE_BRA_DRE: | |
498 | return tape_3590_erp_failed(device, request, irb, rc); | |
499 | default: | |
500 | PRINT_ERR("Unknown BRA %x - This should not happen!\n", | |
501 | sense->bra); | |
502 | BUG(); | |
503 | return TAPE_IO_STOP; | |
504 | } | |
505 | } | |
506 | ||
507 | /* | |
508 | * RDL: Read Device (buffered) log | |
509 | */ | |
510 | static int | |
511 | tape_3590_erp_read_buf_log(struct tape_device *device, | |
512 | struct tape_request *request, struct irb *irb) | |
513 | { | |
514 | /* | |
515 | * We just do the basic error recovery at the moment (retry). | |
516 | * Perhaps in the future, we read the log and dump it somewhere... | |
517 | */ | |
518 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
519 | } | |
520 | ||
521 | /* | |
522 | * SWAP: Swap Devices | |
523 | */ | |
524 | static int | |
525 | tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, | |
526 | struct irb *irb) | |
527 | { | |
528 | /* | |
529 | * This error recovery should swap the tapes | |
530 | * if the original has a problem. The operation | |
531 | * should proceed with the new tape... this | |
532 | * should probably be done in user space! | |
533 | */ | |
534 | PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id); | |
535 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
536 | } | |
537 | ||
538 | /* | |
539 | * LBY: Long Busy | |
540 | */ | |
541 | static int | |
542 | tape_3590_erp_long_busy(struct tape_device *device, | |
543 | struct tape_request *request, struct irb *irb) | |
544 | { | |
545 | /* FIXME: how about WAITING for a minute ? */ | |
546 | PRINT_WARN("(%s): Device is busy! Please wait a minute!\n", | |
547 | device->cdev->dev.bus_id); | |
548 | return tape_3590_erp_basic(device, request, irb, -EBUSY); | |
549 | } | |
550 | ||
551 | /* | |
552 | * SPI: Special Intercept | |
553 | */ | |
554 | static int | |
555 | tape_3590_erp_special_interrupt(struct tape_device *device, | |
556 | struct tape_request *request, struct irb *irb) | |
557 | { | |
558 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
559 | } | |
560 | ||
561 | /* | |
562 | * RDA: Read Alternate | |
563 | */ | |
564 | static int | |
565 | tape_3590_erp_read_alternate(struct tape_device *device, | |
566 | struct tape_request *request, struct irb *irb) | |
567 | { | |
568 | struct tape_3590_disc_data *data; | |
569 | ||
570 | /* | |
571 | * The issued Read Backward or Read Previous command is not | |
572 | * supported by the device | |
573 | * The recovery action should be to issue another command: | |
574 | * Read Revious: if Read Backward is not supported | |
575 | * Read Backward: if Read Previous is not supported | |
576 | */ | |
577 | data = device->discdata; | |
578 | if (data->read_back_op == READ_PREVIOUS) { | |
579 | DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", | |
580 | device->cdev_id); | |
581 | data->read_back_op = READ_BACKWARD; | |
582 | } else { | |
583 | DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", | |
584 | device->cdev_id); | |
585 | data->read_back_op = READ_PREVIOUS; | |
586 | } | |
587 | tape_3590_read_opposite(device, request); | |
588 | return tape_3590_erp_retry(device, request, irb); | |
589 | } | |
590 | ||
591 | /* | |
592 | * Error Recovery read opposite | |
593 | */ | |
594 | static int | |
595 | tape_3590_erp_read_opposite(struct tape_device *device, | |
596 | struct tape_request *request, struct irb *irb) | |
597 | { | |
598 | switch (request->op) { | |
599 | case TO_RFO: | |
600 | /* | |
601 | * We did read forward, but the data could not be read. | |
602 | * We will read backward and then skip forward again. | |
603 | */ | |
604 | tape_3590_read_opposite(device, request); | |
605 | return tape_3590_erp_retry(device, request, irb); | |
606 | case TO_RBA: | |
607 | /* We tried to read forward and backward, but hat no success */ | |
608 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
609 | break; | |
610 | default: | |
611 | PRINT_WARN("read_opposite_recovery_called_with_op: %s\n", | |
612 | tape_op_verbose[request->op]); | |
613 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
614 | } | |
615 | } | |
616 | ||
617 | /* | |
618 | * Print an MIM (Media Information Message) (message code f0) | |
619 | */ | |
620 | static void | |
621 | tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) | |
622 | { | |
623 | struct tape_3590_sense *sense; | |
624 | ||
625 | sense = (struct tape_3590_sense *) irb->ecw; | |
626 | /* Exception Message */ | |
627 | switch (sense->fmt.f70.emc) { | |
628 | case 0x02: | |
629 | PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id); | |
630 | break; | |
631 | case 0x03: | |
632 | PRINT_WARN("(%s): Data degraded in partion %i\n", | |
633 | device->cdev->dev.bus_id, sense->fmt.f70.mp); | |
634 | break; | |
635 | case 0x04: | |
636 | PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id); | |
637 | break; | |
638 | case 0x05: | |
639 | PRINT_WARN("(%s): Medium degraded in partition %i\n", | |
640 | device->cdev->dev.bus_id, sense->fmt.f70.mp); | |
641 | break; | |
642 | case 0x06: | |
643 | PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id); | |
644 | break; | |
645 | case 0x07: | |
646 | PRINT_WARN("(%s): Medium Exception 0x%02x\n", | |
647 | device->cdev->dev.bus_id, sense->fmt.f70.md); | |
648 | break; | |
649 | default: | |
650 | PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n", | |
651 | device->cdev->dev.bus_id, sense->fmt.f70.emc); | |
652 | break; | |
653 | } | |
654 | /* Service Message */ | |
655 | switch (sense->fmt.f70.smc) { | |
656 | case 0x02: | |
657 | PRINT_WARN("(%s): Reference Media maintenance procedure %i\n", | |
658 | device->cdev->dev.bus_id, sense->fmt.f70.md); | |
659 | break; | |
660 | default: | |
661 | PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n", | |
662 | device->cdev->dev.bus_id, sense->fmt.f70.smc); | |
663 | break; | |
664 | } | |
665 | } | |
666 | ||
667 | /* | |
668 | * Print an I/O Subsystem Service Information Message (message code f1) | |
669 | */ | |
670 | static void | |
671 | tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) | |
672 | { | |
673 | struct tape_3590_sense *sense; | |
674 | ||
675 | sense = (struct tape_3590_sense *) irb->ecw; | |
676 | /* Exception Message */ | |
677 | switch (sense->fmt.f71.emc) { | |
678 | case 0x01: | |
679 | PRINT_WARN("(%s): Effect of failure is unknown\n", | |
680 | device->cdev->dev.bus_id); | |
681 | break; | |
682 | case 0x02: | |
683 | PRINT_WARN("(%s): CU Exception - no performance impact\n", | |
684 | device->cdev->dev.bus_id); | |
685 | break; | |
686 | case 0x03: | |
687 | PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n", | |
688 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
689 | break; | |
690 | case 0x04: | |
691 | PRINT_WARN("(%s): CU Exception on device path 0x%02x\n", | |
692 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
693 | break; | |
694 | case 0x05: | |
695 | PRINT_WARN("(%s): CU Exception on library path 0x%02x\n", | |
696 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
697 | break; | |
698 | case 0x06: | |
699 | PRINT_WARN("(%s): CU Exception on node 0x%02x\n", | |
700 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
701 | break; | |
702 | case 0x07: | |
703 | PRINT_WARN("(%s): CU Exception on partition 0x%02x\n", | |
704 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
705 | break; | |
706 | default: | |
707 | PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n", | |
708 | device->cdev->dev.bus_id, sense->fmt.f71.emc); | |
709 | } | |
710 | /* Service Message */ | |
711 | switch (sense->fmt.f71.smc) { | |
712 | case 0x01: | |
713 | PRINT_WARN("(%s): Repair impact is unknown\n", | |
714 | device->cdev->dev.bus_id); | |
715 | break; | |
716 | case 0x02: | |
717 | PRINT_WARN("(%s): Repair will not impact cu performance\n", | |
718 | device->cdev->dev.bus_id); | |
719 | break; | |
720 | case 0x03: | |
721 | if (sense->fmt.f71.mdf == 0) | |
722 | PRINT_WARN("(%s): Repair will disable node " | |
723 | "0x%x on CU\n", | |
724 | device->cdev->dev.bus_id, | |
725 | sense->fmt.f71.md[1]); | |
726 | else | |
727 | PRINT_WARN("(%s): Repair will disable nodes " | |
728 | "(0x%x-0x%x) on CU\n", | |
729 | device->cdev->dev.bus_id, | |
730 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
731 | break; | |
732 | case 0x04: | |
733 | if (sense->fmt.f71.mdf == 0) | |
734 | PRINT_WARN("(%s): Repair will disable cannel path " | |
735 | "0x%x on CU\n", | |
736 | device->cdev->dev.bus_id, | |
737 | sense->fmt.f71.md[1]); | |
738 | else | |
739 | PRINT_WARN("(%s): Repair will disable cannel paths " | |
740 | "(0x%x-0x%x) on CU\n", | |
741 | device->cdev->dev.bus_id, | |
742 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
743 | break; | |
744 | case 0x05: | |
745 | if (sense->fmt.f71.mdf == 0) | |
746 | PRINT_WARN("(%s): Repair will disable device path " | |
747 | "0x%x on CU\n", | |
748 | device->cdev->dev.bus_id, | |
749 | sense->fmt.f71.md[1]); | |
750 | else | |
751 | PRINT_WARN("(%s): Repair will disable device paths " | |
752 | "(0x%x-0x%x) on CU\n", | |
753 | device->cdev->dev.bus_id, | |
754 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
755 | break; | |
756 | case 0x06: | |
757 | if (sense->fmt.f71.mdf == 0) | |
758 | PRINT_WARN("(%s): Repair will disable library path " | |
759 | "0x%x on CU\n", | |
760 | device->cdev->dev.bus_id, | |
761 | sense->fmt.f71.md[1]); | |
762 | else | |
763 | PRINT_WARN("(%s): Repair will disable library paths " | |
764 | "(0x%x-0x%x) on CU\n", | |
765 | device->cdev->dev.bus_id, | |
766 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
767 | break; | |
768 | case 0x07: | |
769 | PRINT_WARN("(%s): Repair will disable access to CU\n", | |
770 | device->cdev->dev.bus_id); | |
771 | break; | |
772 | default: | |
773 | PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n", | |
774 | device->cdev->dev.bus_id, sense->fmt.f71.smc); | |
775 | } | |
776 | } | |
777 | ||
778 | /* | |
779 | * Print an Device Subsystem Service Information Message (message code f2) | |
780 | */ | |
781 | static void | |
782 | tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) | |
783 | { | |
784 | struct tape_3590_sense *sense; | |
785 | ||
786 | sense = (struct tape_3590_sense *) irb->ecw; | |
787 | /* Exception Message */ | |
788 | switch (sense->fmt.f71.emc) { | |
789 | case 0x01: | |
790 | PRINT_WARN("(%s): Effect of failure is unknown\n", | |
791 | device->cdev->dev.bus_id); | |
792 | break; | |
793 | case 0x02: | |
794 | PRINT_WARN("(%s): DV Exception - no performance impact\n", | |
795 | device->cdev->dev.bus_id); | |
796 | break; | |
797 | case 0x03: | |
798 | PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n", | |
799 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
800 | break; | |
801 | case 0x04: | |
802 | PRINT_WARN("(%s): DV Exception on loader 0x%02x\n", | |
803 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
804 | break; | |
805 | case 0x05: | |
806 | PRINT_WARN("(%s): DV Exception on message display 0x%02x\n", | |
807 | device->cdev->dev.bus_id, sense->fmt.f71.md[0]); | |
808 | break; | |
809 | case 0x06: | |
810 | PRINT_WARN("(%s): DV Exception in tape path\n", | |
811 | device->cdev->dev.bus_id); | |
812 | break; | |
813 | case 0x07: | |
814 | PRINT_WARN("(%s): DV Exception in drive\n", | |
815 | device->cdev->dev.bus_id); | |
816 | break; | |
817 | default: | |
818 | PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n", | |
819 | device->cdev->dev.bus_id, sense->fmt.f71.emc); | |
820 | } | |
821 | /* Service Message */ | |
822 | switch (sense->fmt.f71.smc) { | |
823 | case 0x01: | |
824 | PRINT_WARN("(%s): Repair impact is unknown\n", | |
825 | device->cdev->dev.bus_id); | |
826 | break; | |
827 | case 0x02: | |
828 | PRINT_WARN("(%s): Repair will not impact device performance\n", | |
829 | device->cdev->dev.bus_id); | |
830 | break; | |
831 | case 0x03: | |
832 | if (sense->fmt.f71.mdf == 0) | |
833 | PRINT_WARN("(%s): Repair will disable channel path " | |
834 | "0x%x on DV\n", | |
835 | device->cdev->dev.bus_id, | |
836 | sense->fmt.f71.md[1]); | |
837 | else | |
838 | PRINT_WARN("(%s): Repair will disable channel path " | |
839 | "(0x%x-0x%x) on DV\n", | |
840 | device->cdev->dev.bus_id, | |
841 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
842 | break; | |
843 | case 0x04: | |
844 | if (sense->fmt.f71.mdf == 0) | |
845 | PRINT_WARN("(%s): Repair will disable interface 0x%x " | |
846 | "on DV\n", | |
847 | device->cdev->dev.bus_id, | |
848 | sense->fmt.f71.md[1]); | |
849 | else | |
850 | PRINT_WARN("(%s): Repair will disable interfaces " | |
851 | "(0x%x-0x%x) on DV\n", | |
852 | device->cdev->dev.bus_id, | |
853 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
854 | break; | |
855 | case 0x05: | |
856 | if (sense->fmt.f71.mdf == 0) | |
857 | PRINT_WARN("(%s): Repair will disable loader 0x%x " | |
858 | "on DV\n", | |
859 | device->cdev->dev.bus_id, | |
860 | sense->fmt.f71.md[1]); | |
861 | else | |
862 | PRINT_WARN("(%s): Repair will disable loader " | |
863 | "(0x%x-0x%x) on DV\n", | |
864 | device->cdev->dev.bus_id, | |
865 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
866 | break; | |
867 | case 0x07: | |
868 | PRINT_WARN("(%s): Repair will disable access to DV\n", | |
869 | device->cdev->dev.bus_id); | |
870 | break; | |
871 | case 0x08: | |
872 | if (sense->fmt.f71.mdf == 0) | |
873 | PRINT_WARN("(%s): Repair will disable message " | |
874 | "display 0x%x on DV\n", | |
875 | device->cdev->dev.bus_id, | |
876 | sense->fmt.f71.md[1]); | |
877 | else | |
878 | PRINT_WARN("(%s): Repair will disable message " | |
879 | "displays (0x%x-0x%x) on DV\n", | |
880 | device->cdev->dev.bus_id, | |
881 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
882 | break; | |
883 | case 0x09: | |
884 | PRINT_WARN("(%s): Clean DV\n", device->cdev->dev.bus_id); | |
885 | break; | |
886 | default: | |
887 | PRINT_WARN("(%s): DSIM ServiceMsg: 0x%02x\n", | |
888 | device->cdev->dev.bus_id, sense->fmt.f71.smc); | |
889 | } | |
890 | } | |
891 | ||
892 | /* | |
893 | * Print standard ERA Message | |
894 | */ | |
895 | static void | |
896 | tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) | |
897 | { | |
898 | struct tape_3590_sense *sense; | |
899 | ||
900 | sense = (struct tape_3590_sense *) irb->ecw; | |
901 | if (sense->mc == 0) | |
902 | return; | |
903 | if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { | |
904 | if (tape_3590_msg[sense->mc] != NULL) | |
905 | PRINT_WARN("(%s): %s\n", device->cdev->dev.bus_id, | |
906 | tape_3590_msg[sense->mc]); | |
907 | else { | |
908 | PRINT_WARN("(%s): Message Code 0x%x\n", | |
909 | device->cdev->dev.bus_id, sense->mc); | |
910 | } | |
911 | return; | |
912 | } | |
913 | if (sense->mc == 0xf0) { | |
914 | /* Standard Media Information Message */ | |
915 | PRINT_WARN("(%s): MIM SEV=%i, MC=%02x, ES=%x/%x, " | |
916 | "RC=%02x-%04x-%02x\n", device->cdev->dev.bus_id, | |
917 | sense->fmt.f70.sev, sense->mc, | |
918 | sense->fmt.f70.emc, sense->fmt.f70.smc, | |
919 | sense->fmt.f70.refcode, sense->fmt.f70.mid, | |
920 | sense->fmt.f70.fid); | |
921 | tape_3590_print_mim_msg_f0(device, irb); | |
922 | return; | |
923 | } | |
924 | if (sense->mc == 0xf1) { | |
925 | /* Standard I/O Subsystem Service Information Message */ | |
926 | PRINT_WARN("(%s): IOSIM SEV=%i, DEVTYPE=3590/%02x, " | |
927 | "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", | |
928 | device->cdev->dev.bus_id, sense->fmt.f71.sev, | |
929 | device->cdev->id.dev_model, | |
930 | sense->mc, sense->fmt.f71.emc, | |
931 | sense->fmt.f71.smc, sense->fmt.f71.refcode1, | |
932 | sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); | |
933 | tape_3590_print_io_sim_msg_f1(device, irb); | |
934 | return; | |
935 | } | |
936 | if (sense->mc == 0xf2) { | |
937 | /* Standard Device Service Information Message */ | |
938 | PRINT_WARN("(%s): DEVSIM SEV=%i, DEVTYPE=3590/%02x, " | |
939 | "MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", | |
940 | device->cdev->dev.bus_id, sense->fmt.f71.sev, | |
941 | device->cdev->id.dev_model, | |
942 | sense->mc, sense->fmt.f71.emc, | |
943 | sense->fmt.f71.smc, sense->fmt.f71.refcode1, | |
944 | sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); | |
945 | tape_3590_print_dev_sim_msg_f2(device, irb); | |
946 | return; | |
947 | } | |
948 | if (sense->mc == 0xf3) { | |
949 | /* Standard Library Service Information Message */ | |
950 | return; | |
951 | } | |
952 | PRINT_WARN("(%s): Device Message(%x)\n", | |
953 | device->cdev->dev.bus_id, sense->mc); | |
954 | } | |
955 | ||
956 | /* | |
957 | * 3590 error Recovery routine: | |
958 | * If possible, it tries to recover from the error. If this is not possible, | |
959 | * inform the user about the problem. | |
960 | */ | |
961 | static int | |
962 | tape_3590_unit_check(struct tape_device *device, struct tape_request *request, | |
963 | struct irb *irb) | |
964 | { | |
965 | struct tape_3590_sense *sense; | |
966 | int rc; | |
967 | ||
968 | #ifdef CONFIG_S390_TAPE_BLOCK | |
969 | if (request->op == TO_BLOCK) { | |
970 | /* | |
971 | * Recovery for block device requests. Set the block_position | |
972 | * to something invalid and retry. | |
973 | */ | |
974 | device->blk_data.block_position = -1; | |
975 | if (request->retries-- <= 0) | |
976 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
977 | else | |
978 | return tape_3590_erp_retry(device, request, irb); | |
979 | } | |
980 | #endif | |
981 | ||
982 | sense = (struct tape_3590_sense *) irb->ecw; | |
983 | ||
984 | /* | |
985 | * First check all RC-QRCs where we want to do something special | |
986 | * - "break": basic error recovery is done | |
987 | * - "goto out:": just print error message if available | |
988 | */ | |
989 | rc = -EIO; | |
990 | switch (sense->rc_rqc) { | |
991 | ||
992 | case 0x1110: | |
993 | tape_3590_print_era_msg(device, irb); | |
994 | return tape_3590_erp_read_buf_log(device, request, irb); | |
995 | ||
996 | case 0x2011: | |
997 | tape_3590_print_era_msg(device, irb); | |
998 | return tape_3590_erp_read_alternate(device, request, irb); | |
999 | ||
1000 | case 0x2230: | |
1001 | case 0x2231: | |
1002 | tape_3590_print_era_msg(device, irb); | |
1003 | return tape_3590_erp_special_interrupt(device, request, irb); | |
1004 | ||
1005 | case 0x3010: | |
1006 | DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", | |
1007 | device->cdev_id); | |
1008 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1009 | case 0x3012: | |
1010 | DBF_EVENT(2, "(%08x): Forward at End of Partition\n", | |
1011 | device->cdev_id); | |
1012 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1013 | case 0x3020: | |
1014 | DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); | |
1015 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1016 | ||
1017 | case 0x3122: | |
1018 | DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", | |
1019 | device->cdev_id); | |
1020 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1021 | case 0x3123: | |
1022 | DBF_EVENT(2, "(%08x): Rewind Unload complete\n", | |
1023 | device->cdev_id); | |
1024 | tape_med_state_set(device, MS_UNLOADED); | |
1025 | return tape_3590_erp_basic(device, request, irb, 0); | |
1026 | ||
1027 | case 0x4010: | |
1028 | /* | |
1029 | * print additional msg since default msg | |
1030 | * "device intervention" is not very meaningfull | |
1031 | */ | |
1032 | PRINT_WARN("(%s): Tape operation when medium not loaded\n", | |
1033 | device->cdev->dev.bus_id); | |
1034 | tape_med_state_set(device, MS_UNLOADED); | |
1035 | return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); | |
1036 | case 0x4012: /* Device Long Busy */ | |
1037 | tape_3590_print_era_msg(device, irb); | |
1038 | return tape_3590_erp_long_busy(device, request, irb); | |
1039 | ||
1040 | case 0x5010: | |
1041 | if (sense->rac == 0xd0) { | |
1042 | /* Swap */ | |
1043 | tape_3590_print_era_msg(device, irb); | |
1044 | return tape_3590_erp_swap(device, request, irb); | |
1045 | } | |
1046 | if (sense->rac == 0x26) { | |
1047 | /* Read Opposite */ | |
1048 | tape_3590_print_era_msg(device, irb); | |
1049 | return tape_3590_erp_read_opposite(device, request, | |
1050 | irb); | |
1051 | } | |
1052 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1053 | case 0x5020: | |
1054 | case 0x5021: | |
1055 | case 0x5022: | |
1056 | case 0x5040: | |
1057 | case 0x5041: | |
1058 | case 0x5042: | |
1059 | tape_3590_print_era_msg(device, irb); | |
1060 | return tape_3590_erp_swap(device, request, irb); | |
1061 | ||
1062 | case 0x5110: | |
1063 | case 0x5111: | |
1064 | return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); | |
1065 | ||
1066 | case 0x5120: | |
1067 | case 0x1120: | |
1068 | tape_med_state_set(device, MS_UNLOADED); | |
1069 | return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); | |
1070 | ||
1071 | case 0x6020: | |
1072 | PRINT_WARN("(%s): Cartridge of wrong type ?\n", | |
1073 | device->cdev->dev.bus_id); | |
1074 | return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); | |
1075 | ||
1076 | case 0x8011: | |
1077 | PRINT_WARN("(%s): Another host has reserved the tape device\n", | |
1078 | device->cdev->dev.bus_id); | |
1079 | return tape_3590_erp_basic(device, request, irb, -EPERM); | |
1080 | case 0x8013: | |
1081 | PRINT_WARN("(%s): Another host has priviliged access to the " | |
1082 | "tape device\n", device->cdev->dev.bus_id); | |
1083 | PRINT_WARN("(%s): To solve the problem unload the current " | |
1084 | "cartridge!\n", device->cdev->dev.bus_id); | |
1085 | return tape_3590_erp_basic(device, request, irb, -EPERM); | |
1086 | default: | |
1087 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * 3590 interrupt handler: | |
1093 | */ | |
1094 | static int | |
1095 | tape_3590_irq(struct tape_device *device, struct tape_request *request, | |
1096 | struct irb *irb) | |
1097 | { | |
1098 | if (request == NULL) | |
1099 | return tape_3590_unsolicited_irq(device, irb); | |
1100 | ||
1101 | if ((irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) && | |
1102 | (irb->scsw.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) { | |
1103 | /* Write at end of volume */ | |
1104 | DBF_EVENT(2, "End of volume\n"); | |
1105 | return tape_3590_erp_failed(device, request, irb, -ENOSPC); | |
1106 | } | |
1107 | ||
1108 | if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) | |
1109 | return tape_3590_unit_check(device, request, irb); | |
1110 | ||
1111 | if (irb->scsw.dstat & DEV_STAT_DEV_END) { | |
1112 | if (irb->scsw.dstat == DEV_STAT_UNIT_EXCEP) { | |
1113 | if (request->op == TO_FSB || request->op == TO_BSB) | |
1114 | request->rescnt++; | |
1115 | else | |
1116 | DBF_EVENT(5, "Unit Exception!\n"); | |
1117 | } | |
1118 | ||
1119 | return tape_3590_done(device, request); | |
1120 | } | |
1121 | ||
1122 | if (irb->scsw.dstat & DEV_STAT_CHN_END) { | |
1123 | DBF_EVENT(2, "cannel end\n"); | |
1124 | return TAPE_IO_PENDING; | |
1125 | } | |
1126 | ||
1127 | if (irb->scsw.dstat & DEV_STAT_ATTENTION) { | |
1128 | DBF_EVENT(2, "Unit Attention when busy..\n"); | |
1129 | return TAPE_IO_PENDING; | |
1130 | } | |
1131 | ||
1132 | DBF_EVENT(6, "xunknownirq\n"); | |
1133 | PRINT_ERR("Unexpected interrupt.\n"); | |
1134 | PRINT_ERR("Current op is: %s", tape_op_verbose[request->op]); | |
1135 | tape_dump_sense(device, request, irb); | |
1136 | return TAPE_IO_STOP; | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * Setup device function | |
1141 | */ | |
1142 | static int | |
1143 | tape_3590_setup_device(struct tape_device *device) | |
1144 | { | |
1145 | int rc; | |
1146 | struct tape_3590_disc_data *data; | |
1147 | ||
1148 | DBF_EVENT(6, "3590 device setup\n"); | |
1149 | data = kmalloc(sizeof(struct tape_3590_disc_data), | |
1150 | GFP_KERNEL | GFP_DMA); | |
1151 | if (data == NULL) | |
1152 | return -ENOMEM; | |
1153 | data->read_back_op = READ_PREVIOUS; | |
1154 | device->discdata = data; | |
1155 | ||
1156 | if ((rc = tape_std_assign(device)) == 0) { | |
1157 | /* Try to find out if medium is loaded */ | |
1158 | if ((rc = tape_3590_sense_medium(device)) != 0) | |
1159 | DBF_LH(3, "3590 medium sense returned %d\n", rc); | |
1160 | } | |
1161 | ||
1162 | return rc; | |
1163 | } | |
1164 | ||
1165 | /* | |
1166 | * Cleanup device function | |
1167 | */ | |
1168 | static void | |
1169 | tape_3590_cleanup_device(struct tape_device *device) | |
1170 | { | |
1171 | tape_std_unassign(device); | |
1172 | ||
1173 | kfree(device->discdata); | |
1174 | device->discdata = NULL; | |
1175 | } | |
1176 | ||
1177 | /* | |
1178 | * List of 3590 magnetic tape commands. | |
1179 | */ | |
1180 | static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { | |
1181 | [MTRESET] = tape_std_mtreset, | |
1182 | [MTFSF] = tape_std_mtfsf, | |
1183 | [MTBSF] = tape_std_mtbsf, | |
1184 | [MTFSR] = tape_std_mtfsr, | |
1185 | [MTBSR] = tape_std_mtbsr, | |
1186 | [MTWEOF] = tape_std_mtweof, | |
1187 | [MTREW] = tape_std_mtrew, | |
1188 | [MTOFFL] = tape_std_mtoffl, | |
1189 | [MTNOP] = tape_std_mtnop, | |
1190 | [MTRETEN] = tape_std_mtreten, | |
1191 | [MTBSFM] = tape_std_mtbsfm, | |
1192 | [MTFSFM] = tape_std_mtfsfm, | |
1193 | [MTEOM] = tape_std_mteom, | |
1194 | [MTERASE] = tape_std_mterase, | |
1195 | [MTRAS1] = NULL, | |
1196 | [MTRAS2] = NULL, | |
1197 | [MTRAS3] = NULL, | |
1198 | [MTSETBLK] = tape_std_mtsetblk, | |
1199 | [MTSETDENSITY] = NULL, | |
1200 | [MTSEEK] = tape_3590_mtseek, | |
1201 | [MTTELL] = tape_3590_mttell, | |
1202 | [MTSETDRVBUFFER] = NULL, | |
1203 | [MTFSS] = NULL, | |
1204 | [MTBSS] = NULL, | |
1205 | [MTWSM] = NULL, | |
1206 | [MTLOCK] = NULL, | |
1207 | [MTUNLOCK] = NULL, | |
1208 | [MTLOAD] = tape_std_mtload, | |
1209 | [MTUNLOAD] = tape_std_mtunload, | |
1210 | [MTCOMPRESSION] = tape_std_mtcompression, | |
1211 | [MTSETPART] = NULL, | |
1212 | [MTMKPART] = NULL | |
1213 | }; | |
1214 | ||
1215 | /* | |
1216 | * Tape discipline structure for 3590. | |
1217 | */ | |
1218 | static struct tape_discipline tape_discipline_3590 = { | |
1219 | .owner = THIS_MODULE, | |
1220 | .setup_device = tape_3590_setup_device, | |
1221 | .cleanup_device = tape_3590_cleanup_device, | |
1222 | .process_eov = tape_std_process_eov, | |
1223 | .irq = tape_3590_irq, | |
1224 | .read_block = tape_std_read_block, | |
1225 | .write_block = tape_std_write_block, | |
1226 | #ifdef CONFIG_S390_TAPE_BLOCK | |
1227 | .bread = tape_3590_bread, | |
1228 | .free_bread = tape_3590_free_bread, | |
1229 | .check_locate = tape_3590_check_locate, | |
1230 | #endif | |
1231 | .ioctl_fn = tape_3590_ioctl, | |
1232 | .mtop_array = tape_3590_mtop | |
1233 | }; | |
1234 | ||
1235 | static struct ccw_device_id tape_3590_ids[] = { | |
1236 | {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, | |
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); |