Commit | Line | Data |
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b6cba4ee SB |
1 | /* |
2 | * drivers/s390/char/tape_3590.c | |
3 | * tape device discipline for 3590 tapes. | |
4 | * | |
3ef32e62 | 5 | * Copyright IBM Corp. 2001, 2009 |
b6cba4ee SB |
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 | ||
59e36927 | 11 | #define KMSG_COMPONENT "tape_3590" |
bb509912 | 12 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
ab640db0 | 13 | |
b6cba4ee | 14 | #include <linux/module.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
b6cba4ee SB |
16 | #include <linux/init.h> |
17 | #include <linux/bio.h> | |
cced1dd4 | 18 | #include <asm/ebcdic.h> |
b6cba4ee SB |
19 | |
20 | #define TAPE_DBF_AREA tape_3590_dbf | |
ab640db0 | 21 | #define BUFSIZE 512 /* size of buffers for dynamic generated messages */ |
b6cba4ee SB |
22 | |
23 | #include "tape.h" | |
24 | #include "tape_std.h" | |
25 | #include "tape_3590.h" | |
26 | ||
27 | /* | |
28 | * Pointer to debug area. | |
29 | */ | |
30 | debug_info_t *TAPE_DBF_AREA = NULL; | |
31 | EXPORT_SYMBOL(TAPE_DBF_AREA); | |
32 | ||
33 | /******************************************************************* | |
eef35c2d | 34 | * Error Recovery functions: |
b6cba4ee SB |
35 | * - Read Opposite: implemented |
36 | * - Read Device (buffered) log: BRA | |
37 | * - Read Library log: BRA | |
38 | * - Swap Devices: BRA | |
cced1dd4 | 39 | * - Long Busy: implemented |
b6cba4ee SB |
40 | * - Special Intercept: BRA |
41 | * - Read Alternate: implemented | |
42 | *******************************************************************/ | |
43 | ||
b6cba4ee SB |
44 | static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { |
45 | [0x00] = "", | |
46 | [0x10] = "Lost Sense", | |
47 | [0x11] = "Assigned Elsewhere", | |
48 | [0x12] = "Allegiance Reset", | |
49 | [0x13] = "Shared Access Violation", | |
50 | [0x20] = "Command Reject", | |
51 | [0x21] = "Configuration Error", | |
52 | [0x22] = "Protection Exception", | |
53 | [0x23] = "Write Protect", | |
54 | [0x24] = "Write Length", | |
55 | [0x25] = "Read-Only Format", | |
56 | [0x31] = "Beginning of Partition", | |
57 | [0x33] = "End of Partition", | |
58 | [0x34] = "End of Data", | |
59 | [0x35] = "Block not found", | |
60 | [0x40] = "Device Intervention", | |
61 | [0x41] = "Loader Intervention", | |
62 | [0x42] = "Library Intervention", | |
63 | [0x50] = "Write Error", | |
64 | [0x51] = "Erase Error", | |
65 | [0x52] = "Formatting Error", | |
66 | [0x53] = "Read Error", | |
67 | [0x54] = "Unsupported Format", | |
68 | [0x55] = "No Formatting", | |
69 | [0x56] = "Positioning lost", | |
70 | [0x57] = "Read Length", | |
71 | [0x60] = "Unsupported Medium", | |
72 | [0x61] = "Medium Length Error", | |
73 | [0x62] = "Medium removed", | |
74 | [0x64] = "Load Check", | |
75 | [0x65] = "Unload Check", | |
76 | [0x70] = "Equipment Check", | |
77 | [0x71] = "Bus out Check", | |
78 | [0x72] = "Protocol Error", | |
79 | [0x73] = "Interface Error", | |
80 | [0x74] = "Overrun", | |
81 | [0x75] = "Halt Signal", | |
82 | [0x90] = "Device fenced", | |
83 | [0x91] = "Device Path fenced", | |
84 | [0xa0] = "Volume misplaced", | |
85 | [0xa1] = "Volume inaccessible", | |
86 | [0xa2] = "Volume in input", | |
87 | [0xa3] = "Volume ejected", | |
88 | [0xa4] = "All categories reserved", | |
89 | [0xa5] = "Duplicate Volume", | |
90 | [0xa6] = "Library Manager Offline", | |
91 | [0xa7] = "Library Output Station full", | |
92 | [0xa8] = "Vision System non-operational", | |
93 | [0xa9] = "Library Manager Equipment Check", | |
94 | [0xaa] = "Library Equipment Check", | |
95 | [0xab] = "All Library Cells full", | |
96 | [0xac] = "No Cleaner Volumes in Library", | |
97 | [0xad] = "I/O Station door open", | |
98 | [0xae] = "Subsystem environmental alert", | |
99 | }; | |
100 | ||
cced1dd4 MH |
101 | static int crypt_supported(struct tape_device *device) |
102 | { | |
103 | return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); | |
104 | } | |
105 | ||
106 | static int crypt_enabled(struct tape_device *device) | |
107 | { | |
108 | return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); | |
109 | } | |
110 | ||
111 | static void ext_to_int_kekl(struct tape390_kekl *in, | |
112 | struct tape3592_kekl *out) | |
113 | { | |
114 | int i; | |
115 | ||
116 | memset(out, 0, sizeof(*out)); | |
117 | if (in->type == TAPE390_KEKL_TYPE_HASH) | |
118 | out->flags |= 0x40; | |
119 | if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH) | |
120 | out->flags |= 0x80; | |
121 | strncpy(out->label, in->label, 64); | |
122 | for (i = strlen(in->label); i < sizeof(out->label); i++) | |
123 | out->label[i] = ' '; | |
124 | ASCEBC(out->label, sizeof(out->label)); | |
125 | } | |
126 | ||
127 | static void int_to_ext_kekl(struct tape3592_kekl *in, | |
128 | struct tape390_kekl *out) | |
129 | { | |
130 | memset(out, 0, sizeof(*out)); | |
131 | if(in->flags & 0x40) | |
132 | out->type = TAPE390_KEKL_TYPE_HASH; | |
133 | else | |
134 | out->type = TAPE390_KEKL_TYPE_LABEL; | |
135 | if(in->flags & 0x80) | |
136 | out->type_on_tape = TAPE390_KEKL_TYPE_HASH; | |
137 | else | |
138 | out->type_on_tape = TAPE390_KEKL_TYPE_LABEL; | |
139 | memcpy(out->label, in->label, sizeof(in->label)); | |
140 | EBCASC(out->label, sizeof(in->label)); | |
1d802e24 | 141 | strim(out->label); |
cced1dd4 MH |
142 | } |
143 | ||
144 | static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in, | |
145 | struct tape390_kekl_pair *out) | |
146 | { | |
147 | if (in->count == 0) { | |
148 | out->kekl[0].type = TAPE390_KEKL_TYPE_NONE; | |
149 | out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE; | |
150 | out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; | |
151 | out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; | |
152 | } else if (in->count == 1) { | |
153 | int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); | |
154 | out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; | |
155 | out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; | |
156 | } else if (in->count == 2) { | |
157 | int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); | |
158 | int_to_ext_kekl(&in->kekl[1], &out->kekl[1]); | |
159 | } else { | |
160 | printk("Invalid KEKL number: %d\n", in->count); | |
161 | BUG(); | |
162 | } | |
163 | } | |
164 | ||
165 | static int check_ext_kekl(struct tape390_kekl *kekl) | |
166 | { | |
167 | if (kekl->type == TAPE390_KEKL_TYPE_NONE) | |
168 | goto invalid; | |
169 | if (kekl->type > TAPE390_KEKL_TYPE_HASH) | |
170 | goto invalid; | |
171 | if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE) | |
172 | goto invalid; | |
173 | if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH) | |
174 | goto invalid; | |
175 | if ((kekl->type == TAPE390_KEKL_TYPE_HASH) && | |
176 | (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL)) | |
177 | goto invalid; | |
178 | ||
179 | return 0; | |
180 | invalid: | |
181 | return -EINVAL; | |
182 | } | |
183 | ||
184 | static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls) | |
185 | { | |
186 | if (check_ext_kekl(&kekls->kekl[0])) | |
187 | goto invalid; | |
188 | if (check_ext_kekl(&kekls->kekl[1])) | |
189 | goto invalid; | |
190 | ||
191 | return 0; | |
192 | invalid: | |
193 | return -EINVAL; | |
194 | } | |
195 | ||
196 | /* | |
197 | * Query KEKLs | |
198 | */ | |
199 | static int tape_3592_kekl_query(struct tape_device *device, | |
200 | struct tape390_kekl_pair *ext_kekls) | |
201 | { | |
202 | struct tape_request *request; | |
203 | struct tape3592_kekl_query_order *order; | |
204 | struct tape3592_kekl_query_data *int_kekls; | |
205 | int rc; | |
206 | ||
207 | DBF_EVENT(6, "tape3592_kekl_query\n"); | |
208 | int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); | |
209 | if (!int_kekls) | |
210 | return -ENOMEM; | |
211 | request = tape_alloc_request(2, sizeof(*order)); | |
212 | if (IS_ERR(request)) { | |
213 | rc = PTR_ERR(request); | |
214 | goto fail_malloc; | |
215 | } | |
216 | order = request->cpdata; | |
217 | memset(order,0,sizeof(*order)); | |
218 | order->code = 0xe2; | |
219 | order->max_count = 2; | |
220 | request->op = TO_KEKL_QUERY; | |
221 | tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); | |
222 | tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls), | |
223 | int_kekls); | |
224 | rc = tape_do_io(device, request); | |
225 | if (rc) | |
226 | goto fail_request; | |
227 | int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls); | |
228 | ||
229 | rc = 0; | |
230 | fail_request: | |
231 | tape_free_request(request); | |
232 | fail_malloc: | |
233 | kfree(int_kekls); | |
234 | return rc; | |
235 | } | |
236 | ||
237 | /* | |
238 | * IOCTL: Query KEKLs | |
239 | */ | |
240 | static int tape_3592_ioctl_kekl_query(struct tape_device *device, | |
241 | unsigned long arg) | |
242 | { | |
243 | int rc; | |
244 | struct tape390_kekl_pair *ext_kekls; | |
245 | ||
246 | DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n"); | |
247 | if (!crypt_supported(device)) | |
248 | return -ENOSYS; | |
249 | if (!crypt_enabled(device)) | |
250 | return -EUNATCH; | |
251 | ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); | |
252 | if (!ext_kekls) | |
253 | return -ENOMEM; | |
254 | rc = tape_3592_kekl_query(device, ext_kekls); | |
255 | if (rc != 0) | |
256 | goto fail; | |
257 | if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) { | |
258 | rc = -EFAULT; | |
259 | goto fail; | |
260 | } | |
261 | rc = 0; | |
262 | fail: | |
263 | kfree(ext_kekls); | |
264 | return rc; | |
265 | } | |
266 | ||
267 | static int tape_3590_mttell(struct tape_device *device, int mt_count); | |
268 | ||
269 | /* | |
270 | * Set KEKLs | |
271 | */ | |
272 | static int tape_3592_kekl_set(struct tape_device *device, | |
273 | struct tape390_kekl_pair *ext_kekls) | |
274 | { | |
275 | struct tape_request *request; | |
276 | struct tape3592_kekl_set_order *order; | |
277 | ||
278 | DBF_EVENT(6, "tape3592_kekl_set\n"); | |
279 | if (check_ext_kekl_pair(ext_kekls)) { | |
280 | DBF_EVENT(6, "invalid kekls\n"); | |
281 | return -EINVAL; | |
282 | } | |
283 | if (tape_3590_mttell(device, 0) != 0) | |
284 | return -EBADSLT; | |
285 | request = tape_alloc_request(1, sizeof(*order)); | |
286 | if (IS_ERR(request)) | |
287 | return PTR_ERR(request); | |
288 | order = request->cpdata; | |
289 | memset(order, 0, sizeof(*order)); | |
290 | order->code = 0xe3; | |
291 | order->kekls.count = 2; | |
292 | ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]); | |
293 | ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]); | |
294 | request->op = TO_KEKL_SET; | |
295 | tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); | |
296 | ||
297 | return tape_do_io_free(device, request); | |
298 | } | |
299 | ||
300 | /* | |
301 | * IOCTL: Set KEKLs | |
302 | */ | |
303 | static int tape_3592_ioctl_kekl_set(struct tape_device *device, | |
304 | unsigned long arg) | |
305 | { | |
306 | int rc; | |
307 | struct tape390_kekl_pair *ext_kekls; | |
308 | ||
309 | DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n"); | |
310 | if (!crypt_supported(device)) | |
311 | return -ENOSYS; | |
312 | if (!crypt_enabled(device)) | |
313 | return -EUNATCH; | |
314 | ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); | |
315 | if (!ext_kekls) | |
316 | return -ENOMEM; | |
317 | if (copy_from_user(ext_kekls, (char __user *)arg, sizeof(*ext_kekls))) { | |
318 | rc = -EFAULT; | |
319 | goto out; | |
320 | } | |
321 | rc = tape_3592_kekl_set(device, ext_kekls); | |
322 | out: | |
323 | kfree(ext_kekls); | |
324 | return rc; | |
325 | } | |
326 | ||
327 | /* | |
328 | * Enable encryption | |
329 | */ | |
330 | static int tape_3592_enable_crypt(struct tape_device *device) | |
331 | { | |
332 | struct tape_request *request; | |
333 | char *data; | |
334 | ||
335 | DBF_EVENT(6, "tape_3592_enable_crypt\n"); | |
336 | if (!crypt_supported(device)) | |
337 | return -ENOSYS; | |
338 | request = tape_alloc_request(2, 72); | |
339 | if (IS_ERR(request)) | |
340 | return PTR_ERR(request); | |
341 | data = request->cpdata; | |
342 | memset(data,0,72); | |
343 | ||
344 | data[0] = 0x05; | |
345 | data[36 + 0] = 0x03; | |
346 | data[36 + 1] = 0x03; | |
347 | data[36 + 4] = 0x40; | |
348 | data[36 + 6] = 0x01; | |
349 | data[36 + 14] = 0x2f; | |
350 | data[36 + 18] = 0xc3; | |
351 | data[36 + 35] = 0x72; | |
352 | request->op = TO_CRYPT_ON; | |
353 | tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); | |
354 | tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); | |
355 | return tape_do_io_free(device, request); | |
356 | } | |
357 | ||
358 | /* | |
359 | * Disable encryption | |
360 | */ | |
361 | static int tape_3592_disable_crypt(struct tape_device *device) | |
362 | { | |
363 | struct tape_request *request; | |
364 | char *data; | |
365 | ||
366 | DBF_EVENT(6, "tape_3592_disable_crypt\n"); | |
367 | if (!crypt_supported(device)) | |
368 | return -ENOSYS; | |
369 | request = tape_alloc_request(2, 72); | |
370 | if (IS_ERR(request)) | |
371 | return PTR_ERR(request); | |
372 | data = request->cpdata; | |
373 | memset(data,0,72); | |
374 | ||
375 | data[0] = 0x05; | |
376 | data[36 + 0] = 0x03; | |
377 | data[36 + 1] = 0x03; | |
378 | data[36 + 35] = 0x32; | |
379 | ||
380 | request->op = TO_CRYPT_OFF; | |
381 | tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); | |
382 | tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); | |
383 | ||
384 | return tape_do_io_free(device, request); | |
385 | } | |
386 | ||
387 | /* | |
388 | * IOCTL: Set encryption status | |
389 | */ | |
390 | static int tape_3592_ioctl_crypt_set(struct tape_device *device, | |
391 | unsigned long arg) | |
392 | { | |
393 | struct tape390_crypt_info info; | |
394 | ||
395 | DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); | |
396 | if (!crypt_supported(device)) | |
397 | return -ENOSYS; | |
398 | if (copy_from_user(&info, (char __user *)arg, sizeof(info))) | |
399 | return -EFAULT; | |
400 | if (info.status & ~TAPE390_CRYPT_ON_MASK) | |
401 | return -EINVAL; | |
402 | if (info.status & TAPE390_CRYPT_ON_MASK) | |
403 | return tape_3592_enable_crypt(device); | |
404 | else | |
405 | return tape_3592_disable_crypt(device); | |
406 | } | |
407 | ||
408 | static int tape_3590_sense_medium(struct tape_device *device); | |
409 | ||
410 | /* | |
411 | * IOCTL: Query enryption status | |
412 | */ | |
413 | static int tape_3592_ioctl_crypt_query(struct tape_device *device, | |
414 | unsigned long arg) | |
415 | { | |
416 | DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); | |
417 | if (!crypt_supported(device)) | |
418 | return -ENOSYS; | |
419 | tape_3590_sense_medium(device); | |
420 | if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), | |
421 | sizeof(TAPE_3590_CRYPT_INFO(device)))) | |
422 | return -EFAULT; | |
423 | else | |
424 | return 0; | |
425 | } | |
426 | ||
b6cba4ee SB |
427 | /* |
428 | * 3590 IOCTL Overload | |
429 | */ | |
430 | static int | |
431 | tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) | |
432 | { | |
433 | switch (cmd) { | |
434 | case TAPE390_DISPLAY: { | |
435 | struct display_struct disp; | |
436 | ||
437 | if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) | |
438 | return -EFAULT; | |
439 | ||
440 | return tape_std_display(device, &disp); | |
441 | } | |
cced1dd4 MH |
442 | case TAPE390_KEKL_SET: |
443 | return tape_3592_ioctl_kekl_set(device, arg); | |
444 | case TAPE390_KEKL_QUERY: | |
445 | return tape_3592_ioctl_kekl_query(device, arg); | |
446 | case TAPE390_CRYPT_SET: | |
447 | return tape_3592_ioctl_crypt_set(device, arg); | |
448 | case TAPE390_CRYPT_QUERY: | |
449 | return tape_3592_ioctl_crypt_query(device, arg); | |
b6cba4ee SB |
450 | default: |
451 | return -EINVAL; /* no additional ioctls */ | |
452 | } | |
453 | } | |
454 | ||
455 | /* | |
456 | * SENSE Medium: Get Sense data about medium state | |
457 | */ | |
458 | static int | |
459 | tape_3590_sense_medium(struct tape_device *device) | |
460 | { | |
461 | struct tape_request *request; | |
462 | ||
463 | request = tape_alloc_request(1, 128); | |
464 | if (IS_ERR(request)) | |
465 | return PTR_ERR(request); | |
466 | request->op = TO_MSEN; | |
467 | tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); | |
468 | return tape_do_io_free(device, request); | |
469 | } | |
470 | ||
471 | /* | |
472 | * MTTELL: Tell block. Return the number of block relative to current file. | |
473 | */ | |
474 | static int | |
475 | tape_3590_mttell(struct tape_device *device, int mt_count) | |
476 | { | |
477 | __u64 block_id; | |
478 | int rc; | |
479 | ||
480 | rc = tape_std_read_block_id(device, &block_id); | |
481 | if (rc) | |
482 | return rc; | |
483 | return block_id >> 32; | |
484 | } | |
485 | ||
486 | /* | |
487 | * MTSEEK: seek to the specified block. | |
488 | */ | |
489 | static int | |
490 | tape_3590_mtseek(struct tape_device *device, int count) | |
491 | { | |
492 | struct tape_request *request; | |
493 | ||
494 | DBF_EVENT(6, "xsee id: %x\n", count); | |
495 | request = tape_alloc_request(3, 4); | |
496 | if (IS_ERR(request)) | |
497 | return PTR_ERR(request); | |
498 | request->op = TO_LBL; | |
499 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
500 | *(__u32 *) request->cpdata = count; | |
501 | tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); | |
502 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
503 | return tape_do_io_free(device, request); | |
504 | } | |
505 | ||
506 | /* | |
507 | * Read Opposite Error Recovery Function: | |
508 | * Used, when Read Forward does not work | |
509 | */ | |
510 | static void | |
511 | tape_3590_read_opposite(struct tape_device *device, | |
512 | struct tape_request *request) | |
513 | { | |
514 | struct tape_3590_disc_data *data; | |
515 | ||
516 | /* | |
517 | * We have allocated 4 ccws in tape_std_read, so we can now | |
518 | * transform the request to a read backward, followed by a | |
519 | * forward space block. | |
520 | */ | |
521 | request->op = TO_RBA; | |
522 | tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); | |
523 | data = device->discdata; | |
524 | tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, | |
525 | device->char_data.idal_buf); | |
526 | tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); | |
527 | tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); | |
528 | DBF_EVENT(6, "xrop ccwg\n"); | |
529 | } | |
530 | ||
531 | /* | |
532 | * Read Attention Msg | |
533 | * This should be done after an interrupt with attention bit (0x80) | |
534 | * in device state. | |
535 | * | |
536 | * After a "read attention message" request there are two possible | |
537 | * results: | |
538 | * | |
539 | * 1. A unit check is presented, when attention sense is present (e.g. when | |
540 | * a medium has been unloaded). The attention sense comes then | |
541 | * together with the unit check. The recovery action is either "retry" | |
542 | * (in case there is an attention message pending) or "permanent error". | |
543 | * | |
544 | * 2. The attention msg is written to the "read subsystem data" buffer. | |
545 | * In this case we probably should print it to the console. | |
546 | */ | |
547 | static int | |
548 | tape_3590_read_attmsg(struct tape_device *device) | |
549 | { | |
550 | struct tape_request *request; | |
551 | char *buf; | |
552 | ||
553 | request = tape_alloc_request(3, 4096); | |
554 | if (IS_ERR(request)) | |
555 | return PTR_ERR(request); | |
556 | request->op = TO_READ_ATTMSG; | |
557 | buf = request->cpdata; | |
558 | buf[0] = PREP_RD_SS_DATA; | |
559 | buf[6] = RD_ATTMSG; /* read att msg */ | |
560 | tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); | |
561 | tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); | |
562 | tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); | |
563 | return tape_do_io_free(device, request); | |
564 | } | |
565 | ||
566 | /* | |
567 | * These functions are used to schedule follow-up actions from within an | |
568 | * interrupt context (like unsolicited interrupts). | |
569 | */ | |
2cc924b8 SB |
570 | struct work_handler_data { |
571 | struct tape_device *device; | |
572 | enum tape_op op; | |
573 | struct work_struct work; | |
574 | }; | |
575 | ||
b6cba4ee | 576 | static void |
c1637532 | 577 | tape_3590_work_handler(struct work_struct *work) |
b6cba4ee | 578 | { |
c1637532 MS |
579 | struct work_handler_data *p = |
580 | container_of(work, struct work_handler_data, work); | |
b6cba4ee SB |
581 | |
582 | switch (p->op) { | |
583 | case TO_MSEN: | |
584 | tape_3590_sense_medium(p->device); | |
585 | break; | |
586 | case TO_READ_ATTMSG: | |
587 | tape_3590_read_attmsg(p->device); | |
588 | break; | |
cced1dd4 MH |
589 | case TO_CRYPT_ON: |
590 | tape_3592_enable_crypt(p->device); | |
591 | break; | |
592 | case TO_CRYPT_OFF: | |
593 | tape_3592_disable_crypt(p->device); | |
594 | break; | |
b6cba4ee SB |
595 | default: |
596 | DBF_EVENT(3, "T3590: work handler undefined for " | |
597 | "operation 0x%02x\n", p->op); | |
598 | } | |
599 | tape_put_device(p->device); | |
600 | kfree(p); | |
601 | } | |
602 | ||
603 | static int | |
604 | tape_3590_schedule_work(struct tape_device *device, enum tape_op op) | |
605 | { | |
2cc924b8 | 606 | struct work_handler_data *p; |
b6cba4ee SB |
607 | |
608 | if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) | |
609 | return -ENOMEM; | |
610 | ||
c1637532 | 611 | INIT_WORK(&p->work, tape_3590_work_handler); |
b6cba4ee | 612 | |
8fd138c3 | 613 | p->device = tape_get_device(device); |
b6cba4ee SB |
614 | p->op = op; |
615 | ||
616 | schedule_work(&p->work); | |
617 | return 0; | |
618 | } | |
619 | ||
620 | #ifdef CONFIG_S390_TAPE_BLOCK | |
621 | /* | |
622 | * Tape Block READ | |
623 | */ | |
624 | static struct tape_request * | |
625 | tape_3590_bread(struct tape_device *device, struct request *req) | |
626 | { | |
627 | struct tape_request *request; | |
628 | struct ccw1 *ccw; | |
5705f702 | 629 | int count = 0, start_block; |
b6cba4ee SB |
630 | unsigned off; |
631 | char *dst; | |
632 | struct bio_vec *bv; | |
5705f702 | 633 | struct req_iterator iter; |
b6cba4ee SB |
634 | |
635 | DBF_EVENT(6, "xBREDid:"); | |
83096ebf | 636 | start_block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B; |
b6cba4ee SB |
637 | DBF_EVENT(6, "start_block = %i\n", start_block); |
638 | ||
5705f702 N |
639 | rq_for_each_segment(bv, req, iter) |
640 | count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); | |
641 | ||
b6cba4ee SB |
642 | request = tape_alloc_request(2 + count + 1, 4); |
643 | if (IS_ERR(request)) | |
644 | return request; | |
645 | request->op = TO_BLOCK; | |
646 | *(__u32 *) request->cpdata = start_block; | |
647 | ccw = request->cpaddr; | |
648 | ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); | |
649 | ||
650 | /* | |
651 | * We always setup a nop after the mode set ccw. This slot is | |
652 | * used in tape_std_check_locate to insert a locate ccw if the | |
653 | * current tape position doesn't match the start block to be read. | |
654 | */ | |
655 | ccw = tape_ccw_cc(ccw, NOP, 0, NULL); | |
656 | ||
5705f702 | 657 | rq_for_each_segment(bv, req, iter) { |
6c92e699 JA |
658 | dst = page_address(bv->bv_page) + bv->bv_offset; |
659 | for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) { | |
660 | ccw->flags = CCW_FLAG_CC; | |
661 | ccw->cmd_code = READ_FORWARD; | |
662 | ccw->count = TAPEBLOCK_HSEC_SIZE; | |
663 | set_normalized_cda(ccw, (void *) __pa(dst)); | |
664 | ccw++; | |
665 | dst += TAPEBLOCK_HSEC_SIZE; | |
666 | } | |
6aa0d3a9 | 667 | BUG_ON(off > bv->bv_len); |
b6cba4ee SB |
668 | } |
669 | ccw = tape_ccw_end(ccw, NOP, 0, NULL); | |
670 | DBF_EVENT(6, "xBREDccwg\n"); | |
671 | return request; | |
672 | } | |
673 | ||
674 | static void | |
675 | tape_3590_free_bread(struct tape_request *request) | |
676 | { | |
677 | struct ccw1 *ccw; | |
678 | ||
679 | /* Last ccw is a nop and doesn't need clear_normalized_cda */ | |
680 | for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) | |
681 | if (ccw->cmd_code == READ_FORWARD) | |
682 | clear_normalized_cda(ccw); | |
683 | tape_free_request(request); | |
684 | } | |
685 | ||
686 | /* | |
687 | * check_locate is called just before the tape request is passed to | |
688 | * the common io layer for execution. It has to check the current | |
689 | * tape position and insert a locate ccw if it doesn't match the | |
690 | * start block for the request. | |
691 | */ | |
692 | static void | |
693 | tape_3590_check_locate(struct tape_device *device, struct tape_request *request) | |
694 | { | |
695 | __u32 *start_block; | |
696 | ||
697 | start_block = (__u32 *) request->cpdata; | |
698 | if (*start_block != device->blk_data.block_position) { | |
699 | /* Add the start offset of the file to get the real block. */ | |
700 | *start_block += device->bof; | |
701 | tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); | |
702 | } | |
703 | } | |
704 | #endif | |
705 | ||
cced1dd4 MH |
706 | static void tape_3590_med_state_set(struct tape_device *device, |
707 | struct tape_3590_med_sense *sense) | |
708 | { | |
709 | struct tape390_crypt_info *c_info; | |
710 | ||
711 | c_info = &TAPE_3590_CRYPT_INFO(device); | |
712 | ||
1b9fd76e MH |
713 | DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); |
714 | switch (sense->macst) { | |
715 | case 0x04: | |
716 | case 0x05: | |
717 | case 0x06: | |
cced1dd4 MH |
718 | tape_med_state_set(device, MS_UNLOADED); |
719 | TAPE_3590_CRYPT_INFO(device).medium_status = 0; | |
720 | return; | |
1b9fd76e MH |
721 | case 0x08: |
722 | case 0x09: | |
723 | tape_med_state_set(device, MS_LOADED); | |
724 | break; | |
725 | default: | |
726 | tape_med_state_set(device, MS_UNKNOWN); | |
cced1dd4 MH |
727 | return; |
728 | } | |
cced1dd4 MH |
729 | c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; |
730 | if (sense->flags & MSENSE_CRYPT_MASK) { | |
ab640db0 | 731 | DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); |
cced1dd4 MH |
732 | c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; |
733 | } else { | |
734 | DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); | |
735 | c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; | |
736 | } | |
737 | } | |
738 | ||
b6cba4ee SB |
739 | /* |
740 | * The done handler is called at device/channel end and wakes up the sleeping | |
741 | * process | |
742 | */ | |
743 | static int | |
744 | tape_3590_done(struct tape_device *device, struct tape_request *request) | |
745 | { | |
cced1dd4 | 746 | struct tape_3590_disc_data *disc_data; |
b6cba4ee SB |
747 | |
748 | DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); | |
cced1dd4 | 749 | disc_data = device->discdata; |
b6cba4ee SB |
750 | |
751 | switch (request->op) { | |
752 | case TO_BSB: | |
753 | case TO_BSF: | |
754 | case TO_DSE: | |
755 | case TO_FSB: | |
756 | case TO_FSF: | |
757 | case TO_LBL: | |
758 | case TO_RFO: | |
759 | case TO_RBA: | |
760 | case TO_REW: | |
761 | case TO_WRI: | |
762 | case TO_WTM: | |
763 | case TO_BLOCK: | |
764 | case TO_LOAD: | |
765 | tape_med_state_set(device, MS_LOADED); | |
766 | break; | |
767 | case TO_RUN: | |
768 | tape_med_state_set(device, MS_UNLOADED); | |
cced1dd4 | 769 | tape_3590_schedule_work(device, TO_CRYPT_OFF); |
b6cba4ee SB |
770 | break; |
771 | case TO_MSEN: | |
cced1dd4 MH |
772 | tape_3590_med_state_set(device, request->cpdata); |
773 | break; | |
774 | case TO_CRYPT_ON: | |
775 | TAPE_3590_CRYPT_INFO(device).status | |
776 | |= TAPE390_CRYPT_ON_MASK; | |
777 | *(device->modeset_byte) |= 0x03; | |
778 | break; | |
779 | case TO_CRYPT_OFF: | |
780 | TAPE_3590_CRYPT_INFO(device).status | |
781 | &= ~TAPE390_CRYPT_ON_MASK; | |
782 | *(device->modeset_byte) &= ~0x03; | |
b6cba4ee SB |
783 | break; |
784 | case TO_RBI: /* RBI seems to succeed even without medium loaded. */ | |
785 | case TO_NOP: /* Same to NOP. */ | |
786 | case TO_READ_CONFIG: | |
787 | case TO_READ_ATTMSG: | |
788 | case TO_DIS: | |
789 | case TO_ASSIGN: | |
790 | case TO_UNASSIGN: | |
b6cba4ee | 791 | case TO_SIZE: |
cced1dd4 MH |
792 | case TO_KEKL_SET: |
793 | case TO_KEKL_QUERY: | |
e2963062 | 794 | case TO_RDC: |
b6cba4ee SB |
795 | break; |
796 | } | |
797 | return TAPE_IO_SUCCESS; | |
798 | } | |
799 | ||
800 | /* | |
eef35c2d | 801 | * This function is called, when error recovery was successful |
b6cba4ee SB |
802 | */ |
803 | static inline int | |
804 | tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) | |
805 | { | |
73ac36ea | 806 | DBF_EVENT(3, "Error Recovery successful for %s\n", |
b6cba4ee SB |
807 | tape_op_verbose[request->op]); |
808 | return tape_3590_done(device, request); | |
809 | } | |
810 | ||
811 | /* | |
eef35c2d | 812 | * This function is called, when error recovery was not successful |
b6cba4ee SB |
813 | */ |
814 | static inline int | |
815 | tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, | |
816 | struct irb *irb, int rc) | |
817 | { | |
818 | DBF_EVENT(3, "Error Recovery failed for %s\n", | |
819 | tape_op_verbose[request->op]); | |
820 | tape_dump_sense_dbf(device, request, irb); | |
821 | return rc; | |
822 | } | |
823 | ||
824 | /* | |
825 | * Error Recovery do retry | |
826 | */ | |
827 | static inline int | |
828 | tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, | |
829 | struct irb *irb) | |
830 | { | |
831 | DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); | |
832 | tape_dump_sense_dbf(device, request, irb); | |
833 | return TAPE_IO_RETRY; | |
834 | } | |
835 | ||
836 | /* | |
837 | * Handle unsolicited interrupts | |
838 | */ | |
839 | static int | |
840 | tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) | |
841 | { | |
23d805b6 | 842 | if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) |
b6cba4ee SB |
843 | /* Probably result of halt ssch */ |
844 | return TAPE_IO_PENDING; | |
23d805b6 | 845 | else if (irb->scsw.cmd.dstat == 0x85) |
1b9fd76e MH |
846 | /* Device Ready */ |
847 | DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); | |
23d805b6 | 848 | else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
b6cba4ee | 849 | tape_3590_schedule_work(device, TO_READ_ATTMSG); |
1b9fd76e | 850 | } else { |
b6cba4ee | 851 | DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); |
ab640db0 | 852 | tape_dump_sense_dbf(device, NULL, irb); |
b6cba4ee | 853 | } |
1b9fd76e MH |
854 | /* check medium state */ |
855 | tape_3590_schedule_work(device, TO_MSEN); | |
b6cba4ee SB |
856 | return TAPE_IO_SUCCESS; |
857 | } | |
858 | ||
859 | /* | |
860 | * Basic Recovery routine | |
861 | */ | |
862 | static int | |
863 | tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, | |
864 | struct irb *irb, int rc) | |
865 | { | |
866 | struct tape_3590_sense *sense; | |
867 | ||
868 | sense = (struct tape_3590_sense *) irb->ecw; | |
869 | ||
870 | switch (sense->bra) { | |
871 | case SENSE_BRA_PER: | |
872 | return tape_3590_erp_failed(device, request, irb, rc); | |
873 | case SENSE_BRA_CONT: | |
874 | return tape_3590_erp_succeded(device, request); | |
875 | case SENSE_BRA_RE: | |
876 | return tape_3590_erp_retry(device, request, irb); | |
877 | case SENSE_BRA_DRE: | |
878 | return tape_3590_erp_failed(device, request, irb, rc); | |
879 | default: | |
b6cba4ee SB |
880 | BUG(); |
881 | return TAPE_IO_STOP; | |
882 | } | |
883 | } | |
884 | ||
885 | /* | |
886 | * RDL: Read Device (buffered) log | |
887 | */ | |
888 | static int | |
889 | tape_3590_erp_read_buf_log(struct tape_device *device, | |
890 | struct tape_request *request, struct irb *irb) | |
891 | { | |
892 | /* | |
893 | * We just do the basic error recovery at the moment (retry). | |
894 | * Perhaps in the future, we read the log and dump it somewhere... | |
895 | */ | |
896 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
897 | } | |
898 | ||
899 | /* | |
900 | * SWAP: Swap Devices | |
901 | */ | |
902 | static int | |
903 | tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, | |
904 | struct irb *irb) | |
905 | { | |
906 | /* | |
907 | * This error recovery should swap the tapes | |
908 | * if the original has a problem. The operation | |
909 | * should proceed with the new tape... this | |
910 | * should probably be done in user space! | |
911 | */ | |
ab640db0 CO |
912 | dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " |
913 | "different tape unit\n"); | |
b6cba4ee SB |
914 | return tape_3590_erp_basic(device, request, irb, -EIO); |
915 | } | |
916 | ||
917 | /* | |
918 | * LBY: Long Busy | |
919 | */ | |
920 | static int | |
921 | tape_3590_erp_long_busy(struct tape_device *device, | |
922 | struct tape_request *request, struct irb *irb) | |
923 | { | |
cced1dd4 MH |
924 | DBF_EVENT(6, "Device is busy\n"); |
925 | return TAPE_IO_LONG_BUSY; | |
b6cba4ee SB |
926 | } |
927 | ||
928 | /* | |
929 | * SPI: Special Intercept | |
930 | */ | |
931 | static int | |
932 | tape_3590_erp_special_interrupt(struct tape_device *device, | |
933 | struct tape_request *request, struct irb *irb) | |
934 | { | |
935 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
936 | } | |
937 | ||
938 | /* | |
939 | * RDA: Read Alternate | |
940 | */ | |
941 | static int | |
942 | tape_3590_erp_read_alternate(struct tape_device *device, | |
943 | struct tape_request *request, struct irb *irb) | |
944 | { | |
945 | struct tape_3590_disc_data *data; | |
946 | ||
947 | /* | |
948 | * The issued Read Backward or Read Previous command is not | |
949 | * supported by the device | |
950 | * The recovery action should be to issue another command: | |
951 | * Read Revious: if Read Backward is not supported | |
952 | * Read Backward: if Read Previous is not supported | |
953 | */ | |
954 | data = device->discdata; | |
955 | if (data->read_back_op == READ_PREVIOUS) { | |
956 | DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", | |
957 | device->cdev_id); | |
958 | data->read_back_op = READ_BACKWARD; | |
959 | } else { | |
960 | DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", | |
961 | device->cdev_id); | |
962 | data->read_back_op = READ_PREVIOUS; | |
963 | } | |
964 | tape_3590_read_opposite(device, request); | |
965 | return tape_3590_erp_retry(device, request, irb); | |
966 | } | |
967 | ||
968 | /* | |
969 | * Error Recovery read opposite | |
970 | */ | |
971 | static int | |
972 | tape_3590_erp_read_opposite(struct tape_device *device, | |
973 | struct tape_request *request, struct irb *irb) | |
974 | { | |
975 | switch (request->op) { | |
976 | case TO_RFO: | |
977 | /* | |
978 | * We did read forward, but the data could not be read. | |
979 | * We will read backward and then skip forward again. | |
980 | */ | |
981 | tape_3590_read_opposite(device, request); | |
982 | return tape_3590_erp_retry(device, request, irb); | |
983 | case TO_RBA: | |
984 | /* We tried to read forward and backward, but hat no success */ | |
985 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
986 | break; | |
987 | default: | |
b6cba4ee SB |
988 | return tape_3590_erp_failed(device, request, irb, -EIO); |
989 | } | |
990 | } | |
991 | ||
992 | /* | |
993 | * Print an MIM (Media Information Message) (message code f0) | |
994 | */ | |
995 | static void | |
996 | tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) | |
997 | { | |
998 | struct tape_3590_sense *sense; | |
ab640db0 CO |
999 | char *exception, *service; |
1000 | ||
1001 | exception = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1002 | service = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1003 | ||
1004 | if (!exception || !service) | |
1005 | goto out_nomem; | |
b6cba4ee SB |
1006 | |
1007 | sense = (struct tape_3590_sense *) irb->ecw; | |
1008 | /* Exception Message */ | |
1009 | switch (sense->fmt.f70.emc) { | |
1010 | case 0x02: | |
ab640db0 | 1011 | snprintf(exception, BUFSIZE, "Data degraded"); |
b6cba4ee SB |
1012 | break; |
1013 | case 0x03: | |
ab640db0 CO |
1014 | snprintf(exception, BUFSIZE, "Data degraded in partion %i", |
1015 | sense->fmt.f70.mp); | |
b6cba4ee SB |
1016 | break; |
1017 | case 0x04: | |
ab640db0 | 1018 | snprintf(exception, BUFSIZE, "Medium degraded"); |
b6cba4ee SB |
1019 | break; |
1020 | case 0x05: | |
ab640db0 CO |
1021 | snprintf(exception, BUFSIZE, "Medium degraded in partition %i", |
1022 | sense->fmt.f70.mp); | |
b6cba4ee SB |
1023 | break; |
1024 | case 0x06: | |
ab640db0 | 1025 | snprintf(exception, BUFSIZE, "Block 0 Error"); |
b6cba4ee SB |
1026 | break; |
1027 | case 0x07: | |
ab640db0 CO |
1028 | snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", |
1029 | sense->fmt.f70.md); | |
b6cba4ee SB |
1030 | break; |
1031 | default: | |
ab640db0 CO |
1032 | snprintf(exception, BUFSIZE, "0x%02x", |
1033 | sense->fmt.f70.emc); | |
b6cba4ee SB |
1034 | break; |
1035 | } | |
1036 | /* Service Message */ | |
1037 | switch (sense->fmt.f70.smc) { | |
1038 | case 0x02: | |
ab640db0 CO |
1039 | snprintf(service, BUFSIZE, "Reference Media maintenance " |
1040 | "procedure %i", sense->fmt.f70.md); | |
b6cba4ee SB |
1041 | break; |
1042 | default: | |
ab640db0 CO |
1043 | snprintf(service, BUFSIZE, "0x%02x", |
1044 | sense->fmt.f70.smc); | |
b6cba4ee SB |
1045 | break; |
1046 | } | |
ab640db0 CO |
1047 | |
1048 | dev_warn (&device->cdev->dev, "Tape media information: exception %s, " | |
1049 | "service %s\n", exception, service); | |
1050 | ||
1051 | out_nomem: | |
1052 | kfree(exception); | |
1053 | kfree(service); | |
b6cba4ee SB |
1054 | } |
1055 | ||
1056 | /* | |
1057 | * Print an I/O Subsystem Service Information Message (message code f1) | |
1058 | */ | |
1059 | static void | |
1060 | tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) | |
1061 | { | |
1062 | struct tape_3590_sense *sense; | |
ab640db0 CO |
1063 | char *exception, *service; |
1064 | ||
1065 | exception = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1066 | service = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1067 | ||
1068 | if (!exception || !service) | |
1069 | goto out_nomem; | |
b6cba4ee SB |
1070 | |
1071 | sense = (struct tape_3590_sense *) irb->ecw; | |
1072 | /* Exception Message */ | |
1073 | switch (sense->fmt.f71.emc) { | |
1074 | case 0x01: | |
ab640db0 | 1075 | snprintf(exception, BUFSIZE, "Effect of failure is unknown"); |
b6cba4ee SB |
1076 | break; |
1077 | case 0x02: | |
ab640db0 CO |
1078 | snprintf(exception, BUFSIZE, "CU Exception - no performance " |
1079 | "impact"); | |
b6cba4ee SB |
1080 | break; |
1081 | case 0x03: | |
ab640db0 CO |
1082 | snprintf(exception, BUFSIZE, "CU Exception on channel " |
1083 | "interface 0x%02x", sense->fmt.f71.md[0]); | |
b6cba4ee SB |
1084 | break; |
1085 | case 0x04: | |
ab640db0 CO |
1086 | snprintf(exception, BUFSIZE, "CU Exception on device path " |
1087 | "0x%02x", sense->fmt.f71.md[0]); | |
b6cba4ee SB |
1088 | break; |
1089 | case 0x05: | |
ab640db0 CO |
1090 | snprintf(exception, BUFSIZE, "CU Exception on library path " |
1091 | "0x%02x", sense->fmt.f71.md[0]); | |
b6cba4ee SB |
1092 | break; |
1093 | case 0x06: | |
ab640db0 CO |
1094 | snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", |
1095 | sense->fmt.f71.md[0]); | |
b6cba4ee SB |
1096 | break; |
1097 | case 0x07: | |
ab640db0 CO |
1098 | snprintf(exception, BUFSIZE, "CU Exception on partition " |
1099 | "0x%02x", sense->fmt.f71.md[0]); | |
b6cba4ee SB |
1100 | break; |
1101 | default: | |
ab640db0 CO |
1102 | snprintf(exception, BUFSIZE, "0x%02x", |
1103 | sense->fmt.f71.emc); | |
b6cba4ee SB |
1104 | } |
1105 | /* Service Message */ | |
1106 | switch (sense->fmt.f71.smc) { | |
1107 | case 0x01: | |
ab640db0 | 1108 | snprintf(service, BUFSIZE, "Repair impact is unknown"); |
b6cba4ee SB |
1109 | break; |
1110 | case 0x02: | |
ab640db0 CO |
1111 | snprintf(service, BUFSIZE, "Repair will not impact cu " |
1112 | "performance"); | |
b6cba4ee SB |
1113 | break; |
1114 | case 0x03: | |
1115 | if (sense->fmt.f71.mdf == 0) | |
ab640db0 CO |
1116 | snprintf(service, BUFSIZE, "Repair will disable node " |
1117 | "0x%x on CU", sense->fmt.f71.md[1]); | |
b6cba4ee | 1118 | else |
ab640db0 CO |
1119 | snprintf(service, BUFSIZE, "Repair will disable " |
1120 | "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], | |
1121 | sense->fmt.f71.md[2]); | |
b6cba4ee SB |
1122 | break; |
1123 | case 0x04: | |
1124 | if (sense->fmt.f71.mdf == 0) | |
ab640db0 CO |
1125 | snprintf(service, BUFSIZE, "Repair will disable " |
1126 | "channel path 0x%x on CU", | |
1127 | sense->fmt.f71.md[1]); | |
b6cba4ee | 1128 | else |
ab640db0 CO |
1129 | snprintf(service, BUFSIZE, "Repair will disable cannel" |
1130 | " paths (0x%x-0x%x) on CU", | |
1131 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
b6cba4ee SB |
1132 | break; |
1133 | case 0x05: | |
1134 | if (sense->fmt.f71.mdf == 0) | |
ab640db0 CO |
1135 | snprintf(service, BUFSIZE, "Repair will disable device" |
1136 | " path 0x%x on CU", sense->fmt.f71.md[1]); | |
b6cba4ee | 1137 | else |
ab640db0 CO |
1138 | snprintf(service, BUFSIZE, "Repair will disable device" |
1139 | " paths (0x%x-0x%x) on CU", | |
1140 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
b6cba4ee SB |
1141 | break; |
1142 | case 0x06: | |
1143 | if (sense->fmt.f71.mdf == 0) | |
ab640db0 CO |
1144 | snprintf(service, BUFSIZE, "Repair will disable " |
1145 | "library path 0x%x on CU", | |
1146 | sense->fmt.f71.md[1]); | |
b6cba4ee | 1147 | else |
ab640db0 CO |
1148 | snprintf(service, BUFSIZE, "Repair will disable " |
1149 | "library paths (0x%x-0x%x) on CU", | |
1150 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
b6cba4ee SB |
1151 | break; |
1152 | case 0x07: | |
ab640db0 | 1153 | snprintf(service, BUFSIZE, "Repair will disable access to CU"); |
b6cba4ee SB |
1154 | break; |
1155 | default: | |
ab640db0 CO |
1156 | snprintf(service, BUFSIZE, "0x%02x", |
1157 | sense->fmt.f71.smc); | |
b6cba4ee | 1158 | } |
ab640db0 CO |
1159 | |
1160 | dev_warn (&device->cdev->dev, "I/O subsystem information: exception" | |
1161 | " %s, service %s\n", exception, service); | |
1162 | out_nomem: | |
1163 | kfree(exception); | |
1164 | kfree(service); | |
b6cba4ee SB |
1165 | } |
1166 | ||
1167 | /* | |
1168 | * Print an Device Subsystem Service Information Message (message code f2) | |
1169 | */ | |
1170 | static void | |
1171 | tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) | |
1172 | { | |
1173 | struct tape_3590_sense *sense; | |
ab640db0 CO |
1174 | char *exception, *service; |
1175 | ||
1176 | exception = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1177 | service = kmalloc(BUFSIZE, GFP_ATOMIC); | |
1178 | ||
1179 | if (!exception || !service) | |
1180 | goto out_nomem; | |
b6cba4ee SB |
1181 | |
1182 | sense = (struct tape_3590_sense *) irb->ecw; | |
1183 | /* Exception Message */ | |
1184 | switch (sense->fmt.f71.emc) { | |
1185 | case 0x01: | |
ab640db0 | 1186 | snprintf(exception, BUFSIZE, "Effect of failure is unknown"); |
b6cba4ee SB |
1187 | break; |
1188 | case 0x02: | |
ab640db0 CO |
1189 | snprintf(exception, BUFSIZE, "DV Exception - no performance" |
1190 | " impact"); | |
b6cba4ee SB |
1191 | break; |
1192 | case 0x03: | |
ab640db0 CO |
1193 | snprintf(exception, BUFSIZE, "DV Exception on channel " |
1194 | "interface 0x%02x", sense->fmt.f71.md[0]); | |
b6cba4ee SB |
1195 | break; |
1196 | case 0x04: | |
ab640db0 CO |
1197 | snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", |
1198 | sense->fmt.f71.md[0]); | |
b6cba4ee SB |
1199 | break; |
1200 | case 0x05: | |
ab640db0 CO |
1201 | snprintf(exception, BUFSIZE, "DV Exception on message display" |
1202 | " 0x%02x", sense->fmt.f71.md[0]); | |
b6cba4ee SB |
1203 | break; |
1204 | case 0x06: | |
ab640db0 | 1205 | snprintf(exception, BUFSIZE, "DV Exception in tape path"); |
b6cba4ee SB |
1206 | break; |
1207 | case 0x07: | |
ab640db0 | 1208 | snprintf(exception, BUFSIZE, "DV Exception in drive"); |
b6cba4ee SB |
1209 | break; |
1210 | default: | |
ab640db0 CO |
1211 | snprintf(exception, BUFSIZE, "0x%02x", |
1212 | sense->fmt.f71.emc); | |
b6cba4ee SB |
1213 | } |
1214 | /* Service Message */ | |
1215 | switch (sense->fmt.f71.smc) { | |
1216 | case 0x01: | |
ab640db0 | 1217 | snprintf(service, BUFSIZE, "Repair impact is unknown"); |
b6cba4ee SB |
1218 | break; |
1219 | case 0x02: | |
ab640db0 CO |
1220 | snprintf(service, BUFSIZE, "Repair will not impact device " |
1221 | "performance"); | |
b6cba4ee SB |
1222 | break; |
1223 | case 0x03: | |
1224 | if (sense->fmt.f71.mdf == 0) | |
ab640db0 CO |
1225 | snprintf(service, BUFSIZE, "Repair will disable " |
1226 | "channel path 0x%x on DV", | |
1227 | sense->fmt.f71.md[1]); | |
b6cba4ee | 1228 | else |
ab640db0 CO |
1229 | snprintf(service, BUFSIZE, "Repair will disable " |
1230 | "channel path (0x%x-0x%x) on DV", | |
1231 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
b6cba4ee SB |
1232 | break; |
1233 | case 0x04: | |
1234 | if (sense->fmt.f71.mdf == 0) | |
ab640db0 CO |
1235 | snprintf(service, BUFSIZE, "Repair will disable " |
1236 | "interface 0x%x on DV", sense->fmt.f71.md[1]); | |
b6cba4ee | 1237 | else |
ab640db0 CO |
1238 | snprintf(service, BUFSIZE, "Repair will disable " |
1239 | "interfaces (0x%x-0x%x) on DV", | |
1240 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
b6cba4ee SB |
1241 | break; |
1242 | case 0x05: | |
1243 | if (sense->fmt.f71.mdf == 0) | |
ab640db0 CO |
1244 | snprintf(service, BUFSIZE, "Repair will disable loader" |
1245 | " 0x%x on DV", sense->fmt.f71.md[1]); | |
b6cba4ee | 1246 | else |
ab640db0 CO |
1247 | snprintf(service, BUFSIZE, "Repair will disable loader" |
1248 | " (0x%x-0x%x) on DV", | |
1249 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
b6cba4ee SB |
1250 | break; |
1251 | case 0x07: | |
ab640db0 | 1252 | snprintf(service, BUFSIZE, "Repair will disable access to DV"); |
b6cba4ee SB |
1253 | break; |
1254 | case 0x08: | |
1255 | if (sense->fmt.f71.mdf == 0) | |
ab640db0 CO |
1256 | snprintf(service, BUFSIZE, "Repair will disable " |
1257 | "message display 0x%x on DV", | |
1258 | sense->fmt.f71.md[1]); | |
b6cba4ee | 1259 | else |
ab640db0 CO |
1260 | snprintf(service, BUFSIZE, "Repair will disable " |
1261 | "message displays (0x%x-0x%x) on DV", | |
1262 | sense->fmt.f71.md[1], sense->fmt.f71.md[2]); | |
b6cba4ee SB |
1263 | break; |
1264 | case 0x09: | |
ab640db0 | 1265 | snprintf(service, BUFSIZE, "Clean DV"); |
b6cba4ee SB |
1266 | break; |
1267 | default: | |
ab640db0 CO |
1268 | snprintf(service, BUFSIZE, "0x%02x", |
1269 | sense->fmt.f71.smc); | |
b6cba4ee | 1270 | } |
ab640db0 CO |
1271 | |
1272 | dev_warn (&device->cdev->dev, "Device subsystem information: exception" | |
1273 | " %s, service %s\n", exception, service); | |
1274 | out_nomem: | |
1275 | kfree(exception); | |
1276 | kfree(service); | |
b6cba4ee SB |
1277 | } |
1278 | ||
1279 | /* | |
1280 | * Print standard ERA Message | |
1281 | */ | |
1282 | static void | |
1283 | tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) | |
1284 | { | |
1285 | struct tape_3590_sense *sense; | |
1286 | ||
1287 | sense = (struct tape_3590_sense *) irb->ecw; | |
1288 | if (sense->mc == 0) | |
1289 | return; | |
1290 | if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { | |
1291 | if (tape_3590_msg[sense->mc] != NULL) | |
ab640db0 CO |
1292 | dev_warn (&device->cdev->dev, "The tape unit has " |
1293 | "issued sense message %s\n", | |
1294 | tape_3590_msg[sense->mc]); | |
1295 | else | |
1296 | dev_warn (&device->cdev->dev, "The tape unit has " | |
1297 | "issued an unknown sense message code 0x%x\n", | |
1298 | sense->mc); | |
b6cba4ee SB |
1299 | return; |
1300 | } | |
1301 | if (sense->mc == 0xf0) { | |
1302 | /* Standard Media Information Message */ | |
ab640db0 CO |
1303 | dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " |
1304 | "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, | |
1305 | sense->fmt.f70.emc, sense->fmt.f70.smc, | |
1306 | sense->fmt.f70.refcode, sense->fmt.f70.mid, | |
1307 | sense->fmt.f70.fid); | |
b6cba4ee SB |
1308 | tape_3590_print_mim_msg_f0(device, irb); |
1309 | return; | |
1310 | } | |
1311 | if (sense->mc == 0xf1) { | |
1312 | /* Standard I/O Subsystem Service Information Message */ | |
ab640db0 CO |
1313 | dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," |
1314 | " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", | |
1315 | sense->fmt.f71.sev, device->cdev->id.dev_model, | |
1316 | sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, | |
1317 | sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, | |
1318 | sense->fmt.f71.refcode3); | |
b6cba4ee SB |
1319 | tape_3590_print_io_sim_msg_f1(device, irb); |
1320 | return; | |
1321 | } | |
1322 | if (sense->mc == 0xf2) { | |
1323 | /* Standard Device Service Information Message */ | |
ab640db0 CO |
1324 | dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" |
1325 | ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", | |
1326 | sense->fmt.f71.sev, device->cdev->id.dev_model, | |
1327 | sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, | |
1328 | sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, | |
1329 | sense->fmt.f71.refcode3); | |
b6cba4ee SB |
1330 | tape_3590_print_dev_sim_msg_f2(device, irb); |
1331 | return; | |
1332 | } | |
1333 | if (sense->mc == 0xf3) { | |
1334 | /* Standard Library Service Information Message */ | |
1335 | return; | |
1336 | } | |
ab640db0 CO |
1337 | dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " |
1338 | "sense message code %x\n", sense->mc); | |
b6cba4ee SB |
1339 | } |
1340 | ||
cced1dd4 MH |
1341 | static int tape_3590_crypt_error(struct tape_device *device, |
1342 | struct tape_request *request, struct irb *irb) | |
1343 | { | |
1344 | u8 cu_rc, ekm_rc1; | |
1345 | u16 ekm_rc2; | |
1346 | u32 drv_rc; | |
2a0217d5 KS |
1347 | const char *bus_id; |
1348 | char *sense; | |
cced1dd4 MH |
1349 | |
1350 | sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; | |
2a0217d5 | 1351 | bus_id = dev_name(&device->cdev->dev); |
cced1dd4 MH |
1352 | cu_rc = sense[0]; |
1353 | drv_rc = *((u32*) &sense[5]) & 0xffffff; | |
1354 | ekm_rc1 = sense[9]; | |
1355 | ekm_rc2 = *((u16*) &sense[10]); | |
1356 | if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) | |
1357 | /* key not defined on EKM */ | |
1358 | return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); | |
1359 | if ((cu_rc == 1) || (cu_rc == 2)) | |
1360 | /* No connection to EKM */ | |
1361 | return tape_3590_erp_basic(device, request, irb, -ENOTCONN); | |
1362 | ||
ab640db0 CO |
1363 | dev_err (&device->cdev->dev, "The tape unit failed to obtain the " |
1364 | "encryption key from EKM\n"); | |
cced1dd4 MH |
1365 | |
1366 | return tape_3590_erp_basic(device, request, irb, -ENOKEY); | |
1367 | } | |
1368 | ||
b6cba4ee SB |
1369 | /* |
1370 | * 3590 error Recovery routine: | |
1371 | * If possible, it tries to recover from the error. If this is not possible, | |
1372 | * inform the user about the problem. | |
1373 | */ | |
1374 | static int | |
1375 | tape_3590_unit_check(struct tape_device *device, struct tape_request *request, | |
1376 | struct irb *irb) | |
1377 | { | |
1378 | struct tape_3590_sense *sense; | |
1379 | int rc; | |
1380 | ||
1381 | #ifdef CONFIG_S390_TAPE_BLOCK | |
1382 | if (request->op == TO_BLOCK) { | |
1383 | /* | |
1384 | * Recovery for block device requests. Set the block_position | |
1385 | * to something invalid and retry. | |
1386 | */ | |
1387 | device->blk_data.block_position = -1; | |
1388 | if (request->retries-- <= 0) | |
1389 | return tape_3590_erp_failed(device, request, irb, -EIO); | |
1390 | else | |
1391 | return tape_3590_erp_retry(device, request, irb); | |
1392 | } | |
1393 | #endif | |
1394 | ||
1395 | sense = (struct tape_3590_sense *) irb->ecw; | |
1396 | ||
cced1dd4 MH |
1397 | DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); |
1398 | ||
b6cba4ee SB |
1399 | /* |
1400 | * First check all RC-QRCs where we want to do something special | |
1401 | * - "break": basic error recovery is done | |
1402 | * - "goto out:": just print error message if available | |
1403 | */ | |
1404 | rc = -EIO; | |
1405 | switch (sense->rc_rqc) { | |
1406 | ||
1407 | case 0x1110: | |
1408 | tape_3590_print_era_msg(device, irb); | |
1409 | return tape_3590_erp_read_buf_log(device, request, irb); | |
1410 | ||
1411 | case 0x2011: | |
1412 | tape_3590_print_era_msg(device, irb); | |
1413 | return tape_3590_erp_read_alternate(device, request, irb); | |
1414 | ||
1415 | case 0x2230: | |
1416 | case 0x2231: | |
1417 | tape_3590_print_era_msg(device, irb); | |
1418 | return tape_3590_erp_special_interrupt(device, request, irb); | |
cced1dd4 MH |
1419 | case 0x2240: |
1420 | return tape_3590_crypt_error(device, request, irb); | |
b6cba4ee SB |
1421 | |
1422 | case 0x3010: | |
1423 | DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", | |
1424 | device->cdev_id); | |
1425 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1426 | case 0x3012: | |
1427 | DBF_EVENT(2, "(%08x): Forward at End of Partition\n", | |
1428 | device->cdev_id); | |
1429 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1430 | case 0x3020: | |
1431 | DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); | |
1432 | return tape_3590_erp_basic(device, request, irb, -ENOSPC); | |
1433 | ||
1434 | case 0x3122: | |
1435 | DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", | |
1436 | device->cdev_id); | |
1437 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1438 | case 0x3123: | |
1439 | DBF_EVENT(2, "(%08x): Rewind Unload complete\n", | |
1440 | device->cdev_id); | |
1441 | tape_med_state_set(device, MS_UNLOADED); | |
cced1dd4 | 1442 | tape_3590_schedule_work(device, TO_CRYPT_OFF); |
b6cba4ee SB |
1443 | return tape_3590_erp_basic(device, request, irb, 0); |
1444 | ||
1445 | case 0x4010: | |
1446 | /* | |
1447 | * print additional msg since default msg | |
1448 | * "device intervention" is not very meaningfull | |
1449 | */ | |
b6cba4ee | 1450 | tape_med_state_set(device, MS_UNLOADED); |
cced1dd4 | 1451 | tape_3590_schedule_work(device, TO_CRYPT_OFF); |
b6cba4ee SB |
1452 | return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); |
1453 | case 0x4012: /* Device Long Busy */ | |
cced1dd4 MH |
1454 | /* XXX: Also use long busy handling here? */ |
1455 | DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); | |
b6cba4ee | 1456 | tape_3590_print_era_msg(device, irb); |
cced1dd4 MH |
1457 | return tape_3590_erp_basic(device, request, irb, -EBUSY); |
1458 | case 0x4014: | |
1459 | DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); | |
b6cba4ee SB |
1460 | return tape_3590_erp_long_busy(device, request, irb); |
1461 | ||
1462 | case 0x5010: | |
1463 | if (sense->rac == 0xd0) { | |
1464 | /* Swap */ | |
1465 | tape_3590_print_era_msg(device, irb); | |
1466 | return tape_3590_erp_swap(device, request, irb); | |
1467 | } | |
1468 | if (sense->rac == 0x26) { | |
1469 | /* Read Opposite */ | |
1470 | tape_3590_print_era_msg(device, irb); | |
1471 | return tape_3590_erp_read_opposite(device, request, | |
1472 | irb); | |
1473 | } | |
1474 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1475 | case 0x5020: | |
1476 | case 0x5021: | |
1477 | case 0x5022: | |
1478 | case 0x5040: | |
1479 | case 0x5041: | |
1480 | case 0x5042: | |
1481 | tape_3590_print_era_msg(device, irb); | |
1482 | return tape_3590_erp_swap(device, request, irb); | |
1483 | ||
1484 | case 0x5110: | |
1485 | case 0x5111: | |
1486 | return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); | |
1487 | ||
1488 | case 0x5120: | |
1489 | case 0x1120: | |
1490 | tape_med_state_set(device, MS_UNLOADED); | |
cced1dd4 | 1491 | tape_3590_schedule_work(device, TO_CRYPT_OFF); |
b6cba4ee SB |
1492 | return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); |
1493 | ||
1494 | case 0x6020: | |
b6cba4ee SB |
1495 | return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); |
1496 | ||
1497 | case 0x8011: | |
b6cba4ee SB |
1498 | return tape_3590_erp_basic(device, request, irb, -EPERM); |
1499 | case 0x8013: | |
ab640db0 CO |
1500 | dev_warn (&device->cdev->dev, "A different host has privileged" |
1501 | " access to the tape unit\n"); | |
b6cba4ee SB |
1502 | return tape_3590_erp_basic(device, request, irb, -EPERM); |
1503 | default: | |
1504 | return tape_3590_erp_basic(device, request, irb, -EIO); | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | /* | |
1509 | * 3590 interrupt handler: | |
1510 | */ | |
1511 | static int | |
1512 | tape_3590_irq(struct tape_device *device, struct tape_request *request, | |
1513 | struct irb *irb) | |
1514 | { | |
1515 | if (request == NULL) | |
1516 | return tape_3590_unsolicited_irq(device, irb); | |
1517 | ||
23d805b6 PO |
1518 | if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && |
1519 | (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && | |
1520 | (request->op == TO_WRI)) { | |
b6cba4ee SB |
1521 | /* Write at end of volume */ |
1522 | DBF_EVENT(2, "End of volume\n"); | |
1523 | return tape_3590_erp_failed(device, request, irb, -ENOSPC); | |
1524 | } | |
1525 | ||
23d805b6 | 1526 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
b6cba4ee SB |
1527 | return tape_3590_unit_check(device, request, irb); |
1528 | ||
23d805b6 PO |
1529 | if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { |
1530 | if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { | |
b6cba4ee SB |
1531 | if (request->op == TO_FSB || request->op == TO_BSB) |
1532 | request->rescnt++; | |
1533 | else | |
1534 | DBF_EVENT(5, "Unit Exception!\n"); | |
1535 | } | |
1536 | ||
1537 | return tape_3590_done(device, request); | |
1538 | } | |
1539 | ||
23d805b6 | 1540 | if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { |
b6cba4ee SB |
1541 | DBF_EVENT(2, "cannel end\n"); |
1542 | return TAPE_IO_PENDING; | |
1543 | } | |
1544 | ||
23d805b6 | 1545 | if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { |
b6cba4ee SB |
1546 | DBF_EVENT(2, "Unit Attention when busy..\n"); |
1547 | return TAPE_IO_PENDING; | |
1548 | } | |
1549 | ||
1550 | DBF_EVENT(6, "xunknownirq\n"); | |
ab640db0 | 1551 | tape_dump_sense_dbf(device, request, irb); |
b6cba4ee SB |
1552 | return TAPE_IO_STOP; |
1553 | } | |
1554 | ||
e2963062 MH |
1555 | |
1556 | static int tape_3590_read_dev_chars(struct tape_device *device, | |
1557 | struct tape_3590_rdc_data *rdc_data) | |
1558 | { | |
1559 | int rc; | |
1560 | struct tape_request *request; | |
1561 | ||
1562 | request = tape_alloc_request(1, sizeof(*rdc_data)); | |
1563 | if (IS_ERR(request)) | |
1564 | return PTR_ERR(request); | |
1565 | request->op = TO_RDC; | |
1566 | tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), | |
1567 | request->cpdata); | |
1568 | rc = tape_do_io(device, request); | |
1569 | if (rc == 0) | |
1570 | memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); | |
1571 | tape_free_request(request); | |
1572 | return rc; | |
1573 | } | |
1574 | ||
b6cba4ee SB |
1575 | /* |
1576 | * Setup device function | |
1577 | */ | |
1578 | static int | |
1579 | tape_3590_setup_device(struct tape_device *device) | |
1580 | { | |
1581 | int rc; | |
1582 | struct tape_3590_disc_data *data; | |
e2963062 | 1583 | struct tape_3590_rdc_data *rdc_data; |
b6cba4ee SB |
1584 | |
1585 | DBF_EVENT(6, "3590 device setup\n"); | |
cced1dd4 | 1586 | data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); |
b6cba4ee SB |
1587 | if (data == NULL) |
1588 | return -ENOMEM; | |
1589 | data->read_back_op = READ_PREVIOUS; | |
1590 | device->discdata = data; | |
1591 | ||
e2963062 | 1592 | rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); |
cced1dd4 MH |
1593 | if (!rdc_data) { |
1594 | rc = -ENOMEM; | |
1595 | goto fail_kmalloc; | |
1596 | } | |
e2963062 | 1597 | rc = tape_3590_read_dev_chars(device, rdc_data); |
cced1dd4 MH |
1598 | if (rc) { |
1599 | DBF_LH(3, "Read device characteristics failed!\n"); | |
1783e60f | 1600 | goto fail_rdc_data; |
cced1dd4 MH |
1601 | } |
1602 | rc = tape_std_assign(device); | |
1603 | if (rc) | |
1604 | goto fail_rdc_data; | |
e2963062 | 1605 | if (rdc_data->data[31] == 0x13) { |
cced1dd4 MH |
1606 | data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; |
1607 | tape_3592_disable_crypt(device); | |
1608 | } else { | |
1609 | DBF_EVENT(6, "Device has NO crypto support\n"); | |
b6cba4ee | 1610 | } |
cced1dd4 MH |
1611 | /* Try to find out if medium is loaded */ |
1612 | rc = tape_3590_sense_medium(device); | |
1613 | if (rc) { | |
1614 | DBF_LH(3, "3590 medium sense returned %d\n", rc); | |
1615 | goto fail_rdc_data; | |
1616 | } | |
1617 | return 0; | |
b6cba4ee | 1618 | |
cced1dd4 MH |
1619 | fail_rdc_data: |
1620 | kfree(rdc_data); | |
1621 | fail_kmalloc: | |
1622 | kfree(data); | |
b6cba4ee SB |
1623 | return rc; |
1624 | } | |
1625 | ||
1626 | /* | |
1627 | * Cleanup device function | |
1628 | */ | |
1629 | static void | |
1630 | tape_3590_cleanup_device(struct tape_device *device) | |
1631 | { | |
2cc924b8 | 1632 | flush_scheduled_work(); |
b6cba4ee SB |
1633 | tape_std_unassign(device); |
1634 | ||
1635 | kfree(device->discdata); | |
1636 | device->discdata = NULL; | |
1637 | } | |
1638 | ||
1639 | /* | |
1640 | * List of 3590 magnetic tape commands. | |
1641 | */ | |
1642 | static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { | |
1643 | [MTRESET] = tape_std_mtreset, | |
1644 | [MTFSF] = tape_std_mtfsf, | |
1645 | [MTBSF] = tape_std_mtbsf, | |
1646 | [MTFSR] = tape_std_mtfsr, | |
1647 | [MTBSR] = tape_std_mtbsr, | |
1648 | [MTWEOF] = tape_std_mtweof, | |
1649 | [MTREW] = tape_std_mtrew, | |
1650 | [MTOFFL] = tape_std_mtoffl, | |
1651 | [MTNOP] = tape_std_mtnop, | |
1652 | [MTRETEN] = tape_std_mtreten, | |
1653 | [MTBSFM] = tape_std_mtbsfm, | |
1654 | [MTFSFM] = tape_std_mtfsfm, | |
1655 | [MTEOM] = tape_std_mteom, | |
1656 | [MTERASE] = tape_std_mterase, | |
1657 | [MTRAS1] = NULL, | |
1658 | [MTRAS2] = NULL, | |
1659 | [MTRAS3] = NULL, | |
1660 | [MTSETBLK] = tape_std_mtsetblk, | |
1661 | [MTSETDENSITY] = NULL, | |
1662 | [MTSEEK] = tape_3590_mtseek, | |
1663 | [MTTELL] = tape_3590_mttell, | |
1664 | [MTSETDRVBUFFER] = NULL, | |
1665 | [MTFSS] = NULL, | |
1666 | [MTBSS] = NULL, | |
1667 | [MTWSM] = NULL, | |
1668 | [MTLOCK] = NULL, | |
1669 | [MTUNLOCK] = NULL, | |
1670 | [MTLOAD] = tape_std_mtload, | |
1671 | [MTUNLOAD] = tape_std_mtunload, | |
1672 | [MTCOMPRESSION] = tape_std_mtcompression, | |
1673 | [MTSETPART] = NULL, | |
1674 | [MTMKPART] = NULL | |
1675 | }; | |
1676 | ||
1677 | /* | |
1678 | * Tape discipline structure for 3590. | |
1679 | */ | |
1680 | static struct tape_discipline tape_discipline_3590 = { | |
1681 | .owner = THIS_MODULE, | |
1682 | .setup_device = tape_3590_setup_device, | |
1683 | .cleanup_device = tape_3590_cleanup_device, | |
1684 | .process_eov = tape_std_process_eov, | |
1685 | .irq = tape_3590_irq, | |
1686 | .read_block = tape_std_read_block, | |
1687 | .write_block = tape_std_write_block, | |
1688 | #ifdef CONFIG_S390_TAPE_BLOCK | |
1689 | .bread = tape_3590_bread, | |
1690 | .free_bread = tape_3590_free_bread, | |
1691 | .check_locate = tape_3590_check_locate, | |
1692 | #endif | |
1693 | .ioctl_fn = tape_3590_ioctl, | |
1694 | .mtop_array = tape_3590_mtop | |
1695 | }; | |
1696 | ||
1697 | static struct ccw_device_id tape_3590_ids[] = { | |
1698 | {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, | |
2cc924b8 | 1699 | {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, |
b6cba4ee SB |
1700 | { /* end of list */ } |
1701 | }; | |
1702 | ||
1703 | static int | |
1704 | tape_3590_online(struct ccw_device *cdev) | |
1705 | { | |
dff59b64 | 1706 | return tape_generic_online(dev_get_drvdata(&cdev->dev), |
b6cba4ee SB |
1707 | &tape_discipline_3590); |
1708 | } | |
1709 | ||
b6cba4ee SB |
1710 | static struct ccw_driver tape_3590_driver = { |
1711 | .name = "tape_3590", | |
1712 | .owner = THIS_MODULE, | |
1713 | .ids = tape_3590_ids, | |
1714 | .probe = tape_generic_probe, | |
1715 | .remove = tape_generic_remove, | |
4d7a3cdf | 1716 | .set_offline = tape_generic_offline, |
b6cba4ee | 1717 | .set_online = tape_3590_online, |
3ef32e62 | 1718 | .freeze = tape_generic_pm_suspend, |
b6cba4ee SB |
1719 | }; |
1720 | ||
1721 | /* | |
1722 | * Setup discipline structure. | |
1723 | */ | |
1724 | static int | |
1725 | tape_3590_init(void) | |
1726 | { | |
1727 | int rc; | |
1728 | ||
1729 | TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); | |
1730 | debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); | |
1731 | #ifdef DBF_LIKE_HELL | |
1732 | debug_set_level(TAPE_DBF_AREA, 6); | |
1733 | #endif | |
1734 | ||
1735 | DBF_EVENT(3, "3590 init\n"); | |
1736 | /* Register driver for 3590 tapes. */ | |
1737 | rc = ccw_driver_register(&tape_3590_driver); | |
1738 | if (rc) | |
1739 | DBF_EVENT(3, "3590 init failed\n"); | |
1740 | else | |
1741 | DBF_EVENT(3, "3590 registered\n"); | |
1742 | return rc; | |
1743 | } | |
1744 | ||
1745 | static void | |
1746 | tape_3590_exit(void) | |
1747 | { | |
1748 | ccw_driver_unregister(&tape_3590_driver); | |
1749 | ||
1750 | debug_unregister(TAPE_DBF_AREA); | |
1751 | } | |
1752 | ||
1753 | MODULE_DEVICE_TABLE(ccw, tape_3590_ids); | |
1754 | MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); | |
1755 | MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); | |
1756 | MODULE_LICENSE("GPL"); | |
1757 | ||
1758 | module_init(tape_3590_init); | |
1759 | module_exit(tape_3590_exit); |