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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt...
[deliverable/linux.git] / drivers / s390 / block / dasd_eckd.c
1 /*
2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Horst Hummel <Horst.Hummel@de.ibm.com>
5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
8 * Copyright IBM Corp. 1999, 2009
9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
11 */
12
13 #define KMSG_COMPONENT "dasd-eckd"
14
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/hdreg.h> /* HDIO_GETGEO */
19 #include <linux/bio.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
22
23 #include <asm/debug.h>
24 #include <asm/idals.h>
25 #include <asm/ebcdic.h>
26 #include <asm/compat.h>
27 #include <asm/io.h>
28 #include <asm/uaccess.h>
29 #include <asm/cio.h>
30 #include <asm/ccwdev.h>
31 #include <asm/itcw.h>
32
33 #include "dasd_int.h"
34 #include "dasd_eckd.h"
35 #include "../cio/chsc.h"
36
37
38 #ifdef PRINTK_HEADER
39 #undef PRINTK_HEADER
40 #endif /* PRINTK_HEADER */
41 #define PRINTK_HEADER "dasd(eckd):"
42
43 #define ECKD_C0(i) (i->home_bytes)
44 #define ECKD_F(i) (i->formula)
45 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
46 (i->factors.f_0x02.f1))
47 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
48 (i->factors.f_0x02.f2))
49 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
50 (i->factors.f_0x02.f3))
51 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
52 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
53 #define ECKD_F6(i) (i->factor6)
54 #define ECKD_F7(i) (i->factor7)
55 #define ECKD_F8(i) (i->factor8)
56
57 MODULE_LICENSE("GPL");
58
59 static struct dasd_discipline dasd_eckd_discipline;
60
61 /* The ccw bus type uses this table to find devices that it sends to
62 * dasd_eckd_probe */
63 static struct ccw_device_id dasd_eckd_ids[] = {
64 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
65 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
66 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
67 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
68 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
69 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
70 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
71 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
72 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
73 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
74 { /* end of list */ },
75 };
76
77 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
78
79 static struct ccw_driver dasd_eckd_driver; /* see below */
80
81 #define INIT_CQR_OK 0
82 #define INIT_CQR_UNFORMATTED 1
83 #define INIT_CQR_ERROR 2
84
85
86 /* initial attempt at a probe function. this can be simplified once
87 * the other detection code is gone */
88 static int
89 dasd_eckd_probe (struct ccw_device *cdev)
90 {
91 int ret;
92
93 /* set ECKD specific ccw-device options */
94 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
95 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
96 if (ret) {
97 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
98 "dasd_eckd_probe: could not set "
99 "ccw-device options");
100 return ret;
101 }
102 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
103 return ret;
104 }
105
106 static int
107 dasd_eckd_set_online(struct ccw_device *cdev)
108 {
109 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
110 }
111
112 static const int sizes_trk0[] = { 28, 148, 84 };
113 #define LABEL_SIZE 140
114
115 static inline unsigned int
116 round_up_multiple(unsigned int no, unsigned int mult)
117 {
118 int rem = no % mult;
119 return (rem ? no - rem + mult : no);
120 }
121
122 static inline unsigned int
123 ceil_quot(unsigned int d1, unsigned int d2)
124 {
125 return (d1 + (d2 - 1)) / d2;
126 }
127
128 static unsigned int
129 recs_per_track(struct dasd_eckd_characteristics * rdc,
130 unsigned int kl, unsigned int dl)
131 {
132 int dn, kn;
133
134 switch (rdc->dev_type) {
135 case 0x3380:
136 if (kl)
137 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
138 ceil_quot(dl + 12, 32));
139 else
140 return 1499 / (15 + ceil_quot(dl + 12, 32));
141 case 0x3390:
142 dn = ceil_quot(dl + 6, 232) + 1;
143 if (kl) {
144 kn = ceil_quot(kl + 6, 232) + 1;
145 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
146 9 + ceil_quot(dl + 6 * dn, 34));
147 } else
148 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
149 case 0x9345:
150 dn = ceil_quot(dl + 6, 232) + 1;
151 if (kl) {
152 kn = ceil_quot(kl + 6, 232) + 1;
153 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
154 ceil_quot(dl + 6 * dn, 34));
155 } else
156 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
157 }
158 return 0;
159 }
160
161 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
162 {
163 geo->cyl = (__u16) cyl;
164 geo->head = cyl >> 16;
165 geo->head <<= 4;
166 geo->head |= head;
167 }
168
169 static int
170 check_XRC (struct ccw1 *de_ccw,
171 struct DE_eckd_data *data,
172 struct dasd_device *device)
173 {
174 struct dasd_eckd_private *private;
175 int rc;
176
177 private = (struct dasd_eckd_private *) device->private;
178 if (!private->rdc_data.facilities.XRC_supported)
179 return 0;
180
181 /* switch on System Time Stamp - needed for XRC Support */
182 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
183 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
184
185 rc = get_sync_clock(&data->ep_sys_time);
186 /* Ignore return code if sync clock is switched off. */
187 if (rc == -ENOSYS || rc == -EACCES)
188 rc = 0;
189
190 de_ccw->count = sizeof(struct DE_eckd_data);
191 de_ccw->flags |= CCW_FLAG_SLI;
192 return rc;
193 }
194
195 static int
196 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
197 unsigned int totrk, int cmd, struct dasd_device *device)
198 {
199 struct dasd_eckd_private *private;
200 u32 begcyl, endcyl;
201 u16 heads, beghead, endhead;
202 int rc = 0;
203
204 private = (struct dasd_eckd_private *) device->private;
205
206 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
207 ccw->flags = 0;
208 ccw->count = 16;
209 ccw->cda = (__u32) __pa(data);
210
211 memset(data, 0, sizeof(struct DE_eckd_data));
212 switch (cmd) {
213 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
214 case DASD_ECKD_CCW_READ_RECORD_ZERO:
215 case DASD_ECKD_CCW_READ:
216 case DASD_ECKD_CCW_READ_MT:
217 case DASD_ECKD_CCW_READ_CKD:
218 case DASD_ECKD_CCW_READ_CKD_MT:
219 case DASD_ECKD_CCW_READ_KD:
220 case DASD_ECKD_CCW_READ_KD_MT:
221 case DASD_ECKD_CCW_READ_COUNT:
222 data->mask.perm = 0x1;
223 data->attributes.operation = private->attrib.operation;
224 break;
225 case DASD_ECKD_CCW_WRITE:
226 case DASD_ECKD_CCW_WRITE_MT:
227 case DASD_ECKD_CCW_WRITE_KD:
228 case DASD_ECKD_CCW_WRITE_KD_MT:
229 data->mask.perm = 0x02;
230 data->attributes.operation = private->attrib.operation;
231 rc = check_XRC (ccw, data, device);
232 break;
233 case DASD_ECKD_CCW_WRITE_CKD:
234 case DASD_ECKD_CCW_WRITE_CKD_MT:
235 data->attributes.operation = DASD_BYPASS_CACHE;
236 rc = check_XRC (ccw, data, device);
237 break;
238 case DASD_ECKD_CCW_ERASE:
239 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
240 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
241 data->mask.perm = 0x3;
242 data->mask.auth = 0x1;
243 data->attributes.operation = DASD_BYPASS_CACHE;
244 rc = check_XRC (ccw, data, device);
245 break;
246 default:
247 dev_err(&device->cdev->dev,
248 "0x%x is not a known command\n", cmd);
249 break;
250 }
251
252 data->attributes.mode = 0x3; /* ECKD */
253
254 if ((private->rdc_data.cu_type == 0x2105 ||
255 private->rdc_data.cu_type == 0x2107 ||
256 private->rdc_data.cu_type == 0x1750)
257 && !(private->uses_cdl && trk < 2))
258 data->ga_extended |= 0x40; /* Regular Data Format Mode */
259
260 heads = private->rdc_data.trk_per_cyl;
261 begcyl = trk / heads;
262 beghead = trk % heads;
263 endcyl = totrk / heads;
264 endhead = totrk % heads;
265
266 /* check for sequential prestage - enhance cylinder range */
267 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
268 data->attributes.operation == DASD_SEQ_ACCESS) {
269
270 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
271 endcyl += private->attrib.nr_cyl;
272 else
273 endcyl = (private->real_cyl - 1);
274 }
275
276 set_ch_t(&data->beg_ext, begcyl, beghead);
277 set_ch_t(&data->end_ext, endcyl, endhead);
278 return rc;
279 }
280
281 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
282 struct dasd_device *device)
283 {
284 struct dasd_eckd_private *private;
285 int rc;
286
287 private = (struct dasd_eckd_private *) device->private;
288 if (!private->rdc_data.facilities.XRC_supported)
289 return 0;
290
291 /* switch on System Time Stamp - needed for XRC Support */
292 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
293 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
294 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
295
296 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
297 /* Ignore return code if sync clock is switched off. */
298 if (rc == -ENOSYS || rc == -EACCES)
299 rc = 0;
300 return rc;
301 }
302
303 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
304 unsigned int rec_on_trk, int count, int cmd,
305 struct dasd_device *device, unsigned int reclen,
306 unsigned int tlf)
307 {
308 struct dasd_eckd_private *private;
309 int sector;
310 int dn, d;
311
312 private = (struct dasd_eckd_private *) device->private;
313
314 memset(data, 0, sizeof(*data));
315 sector = 0;
316 if (rec_on_trk) {
317 switch (private->rdc_data.dev_type) {
318 case 0x3390:
319 dn = ceil_quot(reclen + 6, 232);
320 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
321 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
322 break;
323 case 0x3380:
324 d = 7 + ceil_quot(reclen + 12, 32);
325 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
326 break;
327 }
328 }
329 data->sector = sector;
330 /* note: meaning of count depends on the operation
331 * for record based I/O it's the number of records, but for
332 * track based I/O it's the number of tracks
333 */
334 data->count = count;
335 switch (cmd) {
336 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
337 data->operation.orientation = 0x3;
338 data->operation.operation = 0x03;
339 break;
340 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
341 data->operation.orientation = 0x3;
342 data->operation.operation = 0x16;
343 break;
344 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
345 data->operation.orientation = 0x1;
346 data->operation.operation = 0x03;
347 data->count++;
348 break;
349 case DASD_ECKD_CCW_READ_RECORD_ZERO:
350 data->operation.orientation = 0x3;
351 data->operation.operation = 0x16;
352 data->count++;
353 break;
354 case DASD_ECKD_CCW_WRITE:
355 case DASD_ECKD_CCW_WRITE_MT:
356 case DASD_ECKD_CCW_WRITE_KD:
357 case DASD_ECKD_CCW_WRITE_KD_MT:
358 data->auxiliary.length_valid = 0x1;
359 data->length = reclen;
360 data->operation.operation = 0x01;
361 break;
362 case DASD_ECKD_CCW_WRITE_CKD:
363 case DASD_ECKD_CCW_WRITE_CKD_MT:
364 data->auxiliary.length_valid = 0x1;
365 data->length = reclen;
366 data->operation.operation = 0x03;
367 break;
368 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
369 data->auxiliary.length_valid = 0x1;
370 data->length = reclen; /* not tlf, as one might think */
371 data->operation.operation = 0x3F;
372 data->extended_operation = 0x23;
373 break;
374 case DASD_ECKD_CCW_READ:
375 case DASD_ECKD_CCW_READ_MT:
376 case DASD_ECKD_CCW_READ_KD:
377 case DASD_ECKD_CCW_READ_KD_MT:
378 data->auxiliary.length_valid = 0x1;
379 data->length = reclen;
380 data->operation.operation = 0x06;
381 break;
382 case DASD_ECKD_CCW_READ_CKD:
383 case DASD_ECKD_CCW_READ_CKD_MT:
384 data->auxiliary.length_valid = 0x1;
385 data->length = reclen;
386 data->operation.operation = 0x16;
387 break;
388 case DASD_ECKD_CCW_READ_COUNT:
389 data->operation.operation = 0x06;
390 break;
391 case DASD_ECKD_CCW_READ_TRACK_DATA:
392 data->auxiliary.length_valid = 0x1;
393 data->length = tlf;
394 data->operation.operation = 0x0C;
395 break;
396 case DASD_ECKD_CCW_ERASE:
397 data->length = reclen;
398 data->auxiliary.length_valid = 0x1;
399 data->operation.operation = 0x0b;
400 break;
401 default:
402 DBF_DEV_EVENT(DBF_ERR, device,
403 "fill LRE unknown opcode 0x%x", cmd);
404 BUG();
405 }
406 set_ch_t(&data->seek_addr,
407 trk / private->rdc_data.trk_per_cyl,
408 trk % private->rdc_data.trk_per_cyl);
409 data->search_arg.cyl = data->seek_addr.cyl;
410 data->search_arg.head = data->seek_addr.head;
411 data->search_arg.record = rec_on_trk;
412 }
413
414 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
415 unsigned int trk, unsigned int totrk, int cmd,
416 struct dasd_device *basedev, struct dasd_device *startdev,
417 unsigned char format, unsigned int rec_on_trk, int count,
418 unsigned int blksize, unsigned int tlf)
419 {
420 struct dasd_eckd_private *basepriv, *startpriv;
421 struct DE_eckd_data *dedata;
422 struct LRE_eckd_data *lredata;
423 u32 begcyl, endcyl;
424 u16 heads, beghead, endhead;
425 int rc = 0;
426
427 basepriv = (struct dasd_eckd_private *) basedev->private;
428 startpriv = (struct dasd_eckd_private *) startdev->private;
429 dedata = &pfxdata->define_extent;
430 lredata = &pfxdata->locate_record;
431
432 ccw->cmd_code = DASD_ECKD_CCW_PFX;
433 ccw->flags = 0;
434 ccw->count = sizeof(*pfxdata);
435 ccw->cda = (__u32) __pa(pfxdata);
436
437 memset(pfxdata, 0, sizeof(*pfxdata));
438 /* prefix data */
439 if (format > 1) {
440 DBF_DEV_EVENT(DBF_ERR, basedev,
441 "PFX LRE unknown format 0x%x", format);
442 BUG();
443 return -EINVAL;
444 }
445 pfxdata->format = format;
446 pfxdata->base_address = basepriv->ned->unit_addr;
447 pfxdata->base_lss = basepriv->ned->ID;
448 pfxdata->validity.define_extent = 1;
449
450 /* private uid is kept up to date, conf_data may be outdated */
451 if (startpriv->uid.type != UA_BASE_DEVICE) {
452 pfxdata->validity.verify_base = 1;
453 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
454 pfxdata->validity.hyper_pav = 1;
455 }
456
457 /* define extend data (mostly)*/
458 switch (cmd) {
459 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
460 case DASD_ECKD_CCW_READ_RECORD_ZERO:
461 case DASD_ECKD_CCW_READ:
462 case DASD_ECKD_CCW_READ_MT:
463 case DASD_ECKD_CCW_READ_CKD:
464 case DASD_ECKD_CCW_READ_CKD_MT:
465 case DASD_ECKD_CCW_READ_KD:
466 case DASD_ECKD_CCW_READ_KD_MT:
467 case DASD_ECKD_CCW_READ_COUNT:
468 dedata->mask.perm = 0x1;
469 dedata->attributes.operation = basepriv->attrib.operation;
470 break;
471 case DASD_ECKD_CCW_READ_TRACK_DATA:
472 dedata->mask.perm = 0x1;
473 dedata->attributes.operation = basepriv->attrib.operation;
474 dedata->blk_size = 0;
475 break;
476 case DASD_ECKD_CCW_WRITE:
477 case DASD_ECKD_CCW_WRITE_MT:
478 case DASD_ECKD_CCW_WRITE_KD:
479 case DASD_ECKD_CCW_WRITE_KD_MT:
480 dedata->mask.perm = 0x02;
481 dedata->attributes.operation = basepriv->attrib.operation;
482 rc = check_XRC_on_prefix(pfxdata, basedev);
483 break;
484 case DASD_ECKD_CCW_WRITE_CKD:
485 case DASD_ECKD_CCW_WRITE_CKD_MT:
486 dedata->attributes.operation = DASD_BYPASS_CACHE;
487 rc = check_XRC_on_prefix(pfxdata, basedev);
488 break;
489 case DASD_ECKD_CCW_ERASE:
490 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
491 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
492 dedata->mask.perm = 0x3;
493 dedata->mask.auth = 0x1;
494 dedata->attributes.operation = DASD_BYPASS_CACHE;
495 rc = check_XRC_on_prefix(pfxdata, basedev);
496 break;
497 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
498 dedata->mask.perm = 0x02;
499 dedata->attributes.operation = basepriv->attrib.operation;
500 dedata->blk_size = blksize;
501 rc = check_XRC_on_prefix(pfxdata, basedev);
502 break;
503 default:
504 DBF_DEV_EVENT(DBF_ERR, basedev,
505 "PFX LRE unknown opcode 0x%x", cmd);
506 BUG();
507 return -EINVAL;
508 }
509
510 dedata->attributes.mode = 0x3; /* ECKD */
511
512 if ((basepriv->rdc_data.cu_type == 0x2105 ||
513 basepriv->rdc_data.cu_type == 0x2107 ||
514 basepriv->rdc_data.cu_type == 0x1750)
515 && !(basepriv->uses_cdl && trk < 2))
516 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
517
518 heads = basepriv->rdc_data.trk_per_cyl;
519 begcyl = trk / heads;
520 beghead = trk % heads;
521 endcyl = totrk / heads;
522 endhead = totrk % heads;
523
524 /* check for sequential prestage - enhance cylinder range */
525 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
526 dedata->attributes.operation == DASD_SEQ_ACCESS) {
527
528 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
529 endcyl += basepriv->attrib.nr_cyl;
530 else
531 endcyl = (basepriv->real_cyl - 1);
532 }
533
534 set_ch_t(&dedata->beg_ext, begcyl, beghead);
535 set_ch_t(&dedata->end_ext, endcyl, endhead);
536
537 if (format == 1) {
538 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
539 basedev, blksize, tlf);
540 }
541
542 return rc;
543 }
544
545 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
546 unsigned int trk, unsigned int totrk, int cmd,
547 struct dasd_device *basedev, struct dasd_device *startdev)
548 {
549 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
550 0, 0, 0, 0, 0);
551 }
552
553 static void
554 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
555 unsigned int rec_on_trk, int no_rec, int cmd,
556 struct dasd_device * device, int reclen)
557 {
558 struct dasd_eckd_private *private;
559 int sector;
560 int dn, d;
561
562 private = (struct dasd_eckd_private *) device->private;
563
564 DBF_DEV_EVENT(DBF_INFO, device,
565 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
566 trk, rec_on_trk, no_rec, cmd, reclen);
567
568 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
569 ccw->flags = 0;
570 ccw->count = 16;
571 ccw->cda = (__u32) __pa(data);
572
573 memset(data, 0, sizeof(struct LO_eckd_data));
574 sector = 0;
575 if (rec_on_trk) {
576 switch (private->rdc_data.dev_type) {
577 case 0x3390:
578 dn = ceil_quot(reclen + 6, 232);
579 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
580 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
581 break;
582 case 0x3380:
583 d = 7 + ceil_quot(reclen + 12, 32);
584 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
585 break;
586 }
587 }
588 data->sector = sector;
589 data->count = no_rec;
590 switch (cmd) {
591 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
592 data->operation.orientation = 0x3;
593 data->operation.operation = 0x03;
594 break;
595 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
596 data->operation.orientation = 0x3;
597 data->operation.operation = 0x16;
598 break;
599 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
600 data->operation.orientation = 0x1;
601 data->operation.operation = 0x03;
602 data->count++;
603 break;
604 case DASD_ECKD_CCW_READ_RECORD_ZERO:
605 data->operation.orientation = 0x3;
606 data->operation.operation = 0x16;
607 data->count++;
608 break;
609 case DASD_ECKD_CCW_WRITE:
610 case DASD_ECKD_CCW_WRITE_MT:
611 case DASD_ECKD_CCW_WRITE_KD:
612 case DASD_ECKD_CCW_WRITE_KD_MT:
613 data->auxiliary.last_bytes_used = 0x1;
614 data->length = reclen;
615 data->operation.operation = 0x01;
616 break;
617 case DASD_ECKD_CCW_WRITE_CKD:
618 case DASD_ECKD_CCW_WRITE_CKD_MT:
619 data->auxiliary.last_bytes_used = 0x1;
620 data->length = reclen;
621 data->operation.operation = 0x03;
622 break;
623 case DASD_ECKD_CCW_READ:
624 case DASD_ECKD_CCW_READ_MT:
625 case DASD_ECKD_CCW_READ_KD:
626 case DASD_ECKD_CCW_READ_KD_MT:
627 data->auxiliary.last_bytes_used = 0x1;
628 data->length = reclen;
629 data->operation.operation = 0x06;
630 break;
631 case DASD_ECKD_CCW_READ_CKD:
632 case DASD_ECKD_CCW_READ_CKD_MT:
633 data->auxiliary.last_bytes_used = 0x1;
634 data->length = reclen;
635 data->operation.operation = 0x16;
636 break;
637 case DASD_ECKD_CCW_READ_COUNT:
638 data->operation.operation = 0x06;
639 break;
640 case DASD_ECKD_CCW_ERASE:
641 data->length = reclen;
642 data->auxiliary.last_bytes_used = 0x1;
643 data->operation.operation = 0x0b;
644 break;
645 default:
646 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
647 "opcode 0x%x", cmd);
648 }
649 set_ch_t(&data->seek_addr,
650 trk / private->rdc_data.trk_per_cyl,
651 trk % private->rdc_data.trk_per_cyl);
652 data->search_arg.cyl = data->seek_addr.cyl;
653 data->search_arg.head = data->seek_addr.head;
654 data->search_arg.record = rec_on_trk;
655 }
656
657 /*
658 * Returns 1 if the block is one of the special blocks that needs
659 * to get read/written with the KD variant of the command.
660 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
661 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
662 * Luckily the KD variants differ only by one bit (0x08) from the
663 * normal variant. So don't wonder about code like:
664 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
665 * ccw->cmd_code |= 0x8;
666 */
667 static inline int
668 dasd_eckd_cdl_special(int blk_per_trk, int recid)
669 {
670 if (recid < 3)
671 return 1;
672 if (recid < blk_per_trk)
673 return 0;
674 if (recid < 2 * blk_per_trk)
675 return 1;
676 return 0;
677 }
678
679 /*
680 * Returns the record size for the special blocks of the cdl format.
681 * Only returns something useful if dasd_eckd_cdl_special is true
682 * for the recid.
683 */
684 static inline int
685 dasd_eckd_cdl_reclen(int recid)
686 {
687 if (recid < 3)
688 return sizes_trk0[recid];
689 return LABEL_SIZE;
690 }
691
692 /*
693 * Generate device unique id that specifies the physical device.
694 */
695 static int dasd_eckd_generate_uid(struct dasd_device *device,
696 struct dasd_uid *uid)
697 {
698 struct dasd_eckd_private *private;
699 int count;
700
701 private = (struct dasd_eckd_private *) device->private;
702 if (!private)
703 return -ENODEV;
704 if (!private->ned || !private->gneq)
705 return -ENODEV;
706
707 memset(uid, 0, sizeof(struct dasd_uid));
708 memcpy(uid->vendor, private->ned->HDA_manufacturer,
709 sizeof(uid->vendor) - 1);
710 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
711 memcpy(uid->serial, private->ned->HDA_location,
712 sizeof(uid->serial) - 1);
713 EBCASC(uid->serial, sizeof(uid->serial) - 1);
714 uid->ssid = private->gneq->subsystemID;
715 uid->real_unit_addr = private->ned->unit_addr;
716 if (private->sneq) {
717 uid->type = private->sneq->sua_flags;
718 if (uid->type == UA_BASE_PAV_ALIAS)
719 uid->base_unit_addr = private->sneq->base_unit_addr;
720 } else {
721 uid->type = UA_BASE_DEVICE;
722 }
723 if (private->vdsneq) {
724 for (count = 0; count < 16; count++) {
725 sprintf(uid->vduit+2*count, "%02x",
726 private->vdsneq->uit[count]);
727 }
728 }
729 return 0;
730 }
731
732 static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
733 void *rcd_buffer,
734 struct ciw *ciw, __u8 lpm)
735 {
736 struct dasd_ccw_req *cqr;
737 struct ccw1 *ccw;
738
739 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count,
740 device);
741
742 if (IS_ERR(cqr)) {
743 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
744 "Could not allocate RCD request");
745 return cqr;
746 }
747
748 ccw = cqr->cpaddr;
749 ccw->cmd_code = ciw->cmd;
750 ccw->cda = (__u32)(addr_t)rcd_buffer;
751 ccw->count = ciw->count;
752
753 cqr->startdev = device;
754 cqr->memdev = device;
755 cqr->block = NULL;
756 cqr->expires = 10*HZ;
757 cqr->lpm = lpm;
758 cqr->retries = 256;
759 cqr->buildclk = get_clock();
760 cqr->status = DASD_CQR_FILLED;
761 return cqr;
762 }
763
764 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
765 void **rcd_buffer,
766 int *rcd_buffer_size, __u8 lpm)
767 {
768 struct ciw *ciw;
769 char *rcd_buf = NULL;
770 int ret;
771 struct dasd_ccw_req *cqr;
772
773 /*
774 * scan for RCD command in extended SenseID data
775 */
776 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
777 if (!ciw || ciw->cmd == 0) {
778 ret = -EOPNOTSUPP;
779 goto out_error;
780 }
781 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
782 if (!rcd_buf) {
783 ret = -ENOMEM;
784 goto out_error;
785 }
786
787 /*
788 * buffer has to start with EBCDIC "V1.0" to show
789 * support for virtual device SNEQ
790 */
791 rcd_buf[0] = 0xE5;
792 rcd_buf[1] = 0xF1;
793 rcd_buf[2] = 0x4B;
794 rcd_buf[3] = 0xF0;
795 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
796 if (IS_ERR(cqr)) {
797 ret = PTR_ERR(cqr);
798 goto out_error;
799 }
800 ret = dasd_sleep_on(cqr);
801 /*
802 * on success we update the user input parms
803 */
804 dasd_sfree_request(cqr, cqr->memdev);
805 if (ret)
806 goto out_error;
807
808 *rcd_buffer_size = ciw->count;
809 *rcd_buffer = rcd_buf;
810 return 0;
811 out_error:
812 kfree(rcd_buf);
813 *rcd_buffer = NULL;
814 *rcd_buffer_size = 0;
815 return ret;
816 }
817
818 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
819 {
820
821 struct dasd_sneq *sneq;
822 int i, count;
823
824 private->ned = NULL;
825 private->sneq = NULL;
826 private->vdsneq = NULL;
827 private->gneq = NULL;
828 count = private->conf_len / sizeof(struct dasd_sneq);
829 sneq = (struct dasd_sneq *)private->conf_data;
830 for (i = 0; i < count; ++i) {
831 if (sneq->flags.identifier == 1 && sneq->format == 1)
832 private->sneq = sneq;
833 else if (sneq->flags.identifier == 1 && sneq->format == 4)
834 private->vdsneq = (struct vd_sneq *)sneq;
835 else if (sneq->flags.identifier == 2)
836 private->gneq = (struct dasd_gneq *)sneq;
837 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
838 private->ned = (struct dasd_ned *)sneq;
839 sneq++;
840 }
841 if (!private->ned || !private->gneq) {
842 private->ned = NULL;
843 private->sneq = NULL;
844 private->vdsneq = NULL;
845 private->gneq = NULL;
846 return -EINVAL;
847 }
848 return 0;
849
850 };
851
852 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
853 {
854 struct dasd_gneq *gneq;
855 int i, count, found;
856
857 count = conf_len / sizeof(*gneq);
858 gneq = (struct dasd_gneq *)conf_data;
859 found = 0;
860 for (i = 0; i < count; ++i) {
861 if (gneq->flags.identifier == 2) {
862 found = 1;
863 break;
864 }
865 gneq++;
866 }
867 if (found)
868 return ((char *)gneq)[18] & 0x07;
869 else
870 return 0;
871 }
872
873 static int dasd_eckd_read_conf(struct dasd_device *device)
874 {
875 void *conf_data;
876 int conf_len, conf_data_saved;
877 int rc;
878 __u8 lpm;
879 struct dasd_eckd_private *private;
880 struct dasd_eckd_path *path_data;
881
882 private = (struct dasd_eckd_private *) device->private;
883 path_data = (struct dasd_eckd_path *) &private->path_data;
884 path_data->opm = ccw_device_get_path_mask(device->cdev);
885 lpm = 0x80;
886 conf_data_saved = 0;
887 /* get configuration data per operational path */
888 for (lpm = 0x80; lpm; lpm>>= 1) {
889 if (lpm & path_data->opm){
890 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
891 &conf_len, lpm);
892 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
893 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
894 "Read configuration data returned "
895 "error %d", rc);
896 return rc;
897 }
898 if (conf_data == NULL) {
899 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
900 "No configuration data "
901 "retrieved");
902 continue; /* no error */
903 }
904 /* save first valid configuration data */
905 if (!conf_data_saved) {
906 kfree(private->conf_data);
907 private->conf_data = conf_data;
908 private->conf_len = conf_len;
909 if (dasd_eckd_identify_conf_parts(private)) {
910 private->conf_data = NULL;
911 private->conf_len = 0;
912 kfree(conf_data);
913 continue;
914 }
915 conf_data_saved++;
916 }
917 switch (dasd_eckd_path_access(conf_data, conf_len)) {
918 case 0x02:
919 path_data->npm |= lpm;
920 break;
921 case 0x03:
922 path_data->ppm |= lpm;
923 break;
924 }
925 if (conf_data != private->conf_data)
926 kfree(conf_data);
927 }
928 }
929 return 0;
930 }
931
932 static int dasd_eckd_read_features(struct dasd_device *device)
933 {
934 struct dasd_psf_prssd_data *prssdp;
935 struct dasd_rssd_features *features;
936 struct dasd_ccw_req *cqr;
937 struct ccw1 *ccw;
938 int rc;
939 struct dasd_eckd_private *private;
940
941 private = (struct dasd_eckd_private *) device->private;
942 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
943 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
944 (sizeof(struct dasd_psf_prssd_data) +
945 sizeof(struct dasd_rssd_features)),
946 device);
947 if (IS_ERR(cqr)) {
948 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
949 "allocate initialization request");
950 return PTR_ERR(cqr);
951 }
952 cqr->startdev = device;
953 cqr->memdev = device;
954 cqr->block = NULL;
955 cqr->retries = 256;
956 cqr->expires = 10 * HZ;
957
958 /* Prepare for Read Subsystem Data */
959 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
960 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
961 prssdp->order = PSF_ORDER_PRSSD;
962 prssdp->suborder = 0x41; /* Read Feature Codes */
963 /* all other bytes of prssdp must be zero */
964
965 ccw = cqr->cpaddr;
966 ccw->cmd_code = DASD_ECKD_CCW_PSF;
967 ccw->count = sizeof(struct dasd_psf_prssd_data);
968 ccw->flags |= CCW_FLAG_CC;
969 ccw->cda = (__u32)(addr_t) prssdp;
970
971 /* Read Subsystem Data - feature codes */
972 features = (struct dasd_rssd_features *) (prssdp + 1);
973 memset(features, 0, sizeof(struct dasd_rssd_features));
974
975 ccw++;
976 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
977 ccw->count = sizeof(struct dasd_rssd_features);
978 ccw->cda = (__u32)(addr_t) features;
979
980 cqr->buildclk = get_clock();
981 cqr->status = DASD_CQR_FILLED;
982 rc = dasd_sleep_on(cqr);
983 if (rc == 0) {
984 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
985 features = (struct dasd_rssd_features *) (prssdp + 1);
986 memcpy(&private->features, features,
987 sizeof(struct dasd_rssd_features));
988 } else
989 dev_warn(&device->cdev->dev, "Reading device feature codes"
990 " failed with rc=%d\n", rc);
991 dasd_sfree_request(cqr, cqr->memdev);
992 return rc;
993 }
994
995
996 /*
997 * Build CP for Perform Subsystem Function - SSC.
998 */
999 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1000 int enable_pav)
1001 {
1002 struct dasd_ccw_req *cqr;
1003 struct dasd_psf_ssc_data *psf_ssc_data;
1004 struct ccw1 *ccw;
1005
1006 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1007 sizeof(struct dasd_psf_ssc_data),
1008 device);
1009
1010 if (IS_ERR(cqr)) {
1011 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1012 "Could not allocate PSF-SSC request");
1013 return cqr;
1014 }
1015 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1016 psf_ssc_data->order = PSF_ORDER_SSC;
1017 psf_ssc_data->suborder = 0xc0;
1018 if (enable_pav) {
1019 psf_ssc_data->suborder |= 0x08;
1020 psf_ssc_data->reserved[0] = 0x88;
1021 }
1022 ccw = cqr->cpaddr;
1023 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1024 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1025 ccw->count = 66;
1026
1027 cqr->startdev = device;
1028 cqr->memdev = device;
1029 cqr->block = NULL;
1030 cqr->retries = 256;
1031 cqr->expires = 10*HZ;
1032 cqr->buildclk = get_clock();
1033 cqr->status = DASD_CQR_FILLED;
1034 return cqr;
1035 }
1036
1037 /*
1038 * Perform Subsystem Function.
1039 * It is necessary to trigger CIO for channel revalidation since this
1040 * call might change behaviour of DASD devices.
1041 */
1042 static int
1043 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
1044 {
1045 struct dasd_ccw_req *cqr;
1046 int rc;
1047
1048 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1049 if (IS_ERR(cqr))
1050 return PTR_ERR(cqr);
1051
1052 rc = dasd_sleep_on(cqr);
1053 if (!rc)
1054 /* trigger CIO to reprobe devices */
1055 css_schedule_reprobe();
1056 dasd_sfree_request(cqr, cqr->memdev);
1057 return rc;
1058 }
1059
1060 /*
1061 * Valide storage server of current device.
1062 */
1063 static void dasd_eckd_validate_server(struct dasd_device *device)
1064 {
1065 int rc;
1066 struct dasd_eckd_private *private;
1067 int enable_pav;
1068
1069 if (dasd_nopav || MACHINE_IS_VM)
1070 enable_pav = 0;
1071 else
1072 enable_pav = 1;
1073 rc = dasd_eckd_psf_ssc(device, enable_pav);
1074
1075 /* may be requested feature is not available on server,
1076 * therefore just report error and go ahead */
1077 private = (struct dasd_eckd_private *) device->private;
1078 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1079 "returned rc=%d", private->uid.ssid, rc);
1080 }
1081
1082 /*
1083 * Check device characteristics.
1084 * If the device is accessible using ECKD discipline, the device is enabled.
1085 */
1086 static int
1087 dasd_eckd_check_characteristics(struct dasd_device *device)
1088 {
1089 struct dasd_eckd_private *private;
1090 struct dasd_block *block;
1091 int is_known, rc;
1092
1093 if (!ccw_device_is_pathgroup(device->cdev)) {
1094 dev_warn(&device->cdev->dev,
1095 "A channel path group could not be established\n");
1096 return -EIO;
1097 }
1098 if (!ccw_device_is_multipath(device->cdev)) {
1099 dev_info(&device->cdev->dev,
1100 "The DASD is not operating in multipath mode\n");
1101 }
1102 private = (struct dasd_eckd_private *) device->private;
1103 if (!private) {
1104 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1105 if (!private) {
1106 dev_warn(&device->cdev->dev,
1107 "Allocating memory for private DASD data "
1108 "failed\n");
1109 return -ENOMEM;
1110 }
1111 device->private = (void *) private;
1112 } else {
1113 memset(private, 0, sizeof(*private));
1114 }
1115 /* Invalidate status of initial analysis. */
1116 private->init_cqr_status = -1;
1117 /* Set default cache operations. */
1118 private->attrib.operation = DASD_NORMAL_CACHE;
1119 private->attrib.nr_cyl = 0;
1120
1121 /* Read Configuration Data */
1122 rc = dasd_eckd_read_conf(device);
1123 if (rc)
1124 goto out_err1;
1125
1126 /* Generate device unique id and register in devmap */
1127 rc = dasd_eckd_generate_uid(device, &private->uid);
1128 if (rc)
1129 goto out_err1;
1130 dasd_set_uid(device->cdev, &private->uid);
1131
1132 if (private->uid.type == UA_BASE_DEVICE) {
1133 block = dasd_alloc_block();
1134 if (IS_ERR(block)) {
1135 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1136 "could not allocate dasd "
1137 "block structure");
1138 rc = PTR_ERR(block);
1139 goto out_err1;
1140 }
1141 device->block = block;
1142 block->base = device;
1143 }
1144
1145 /* register lcu with alias handling, enable PAV if this is a new lcu */
1146 is_known = dasd_alias_make_device_known_to_lcu(device);
1147 if (is_known < 0) {
1148 rc = is_known;
1149 goto out_err2;
1150 }
1151 /*
1152 * dasd_eckd_vaildate_server is done on the first device that
1153 * is found for an LCU. All later other devices have to wait
1154 * for it, so they will read the correct feature codes.
1155 */
1156 if (!is_known) {
1157 dasd_eckd_validate_server(device);
1158 dasd_alias_lcu_setup_complete(device);
1159 } else
1160 dasd_alias_wait_for_lcu_setup(device);
1161
1162 /* device may report different configuration data after LCU setup */
1163 rc = dasd_eckd_read_conf(device);
1164 if (rc)
1165 goto out_err3;
1166
1167 /* Read Feature Codes */
1168 dasd_eckd_read_features(device);
1169
1170 /* Read Device Characteristics */
1171 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1172 &private->rdc_data, 64);
1173 if (rc) {
1174 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1175 "Read device characteristic failed, rc=%d", rc);
1176 goto out_err3;
1177 }
1178 /* find the vaild cylinder size */
1179 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1180 private->rdc_data.long_no_cyl)
1181 private->real_cyl = private->rdc_data.long_no_cyl;
1182 else
1183 private->real_cyl = private->rdc_data.no_cyl;
1184
1185 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1186 "with %d cylinders, %d heads, %d sectors\n",
1187 private->rdc_data.dev_type,
1188 private->rdc_data.dev_model,
1189 private->rdc_data.cu_type,
1190 private->rdc_data.cu_model.model,
1191 private->real_cyl,
1192 private->rdc_data.trk_per_cyl,
1193 private->rdc_data.sec_per_trk);
1194 return 0;
1195
1196 out_err3:
1197 dasd_alias_disconnect_device_from_lcu(device);
1198 out_err2:
1199 dasd_free_block(device->block);
1200 device->block = NULL;
1201 out_err1:
1202 kfree(private->conf_data);
1203 kfree(device->private);
1204 device->private = NULL;
1205 return rc;
1206 }
1207
1208 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1209 {
1210 struct dasd_eckd_private *private;
1211
1212 private = (struct dasd_eckd_private *) device->private;
1213 dasd_alias_disconnect_device_from_lcu(device);
1214 private->ned = NULL;
1215 private->sneq = NULL;
1216 private->vdsneq = NULL;
1217 private->gneq = NULL;
1218 private->conf_len = 0;
1219 kfree(private->conf_data);
1220 private->conf_data = NULL;
1221 }
1222
1223 static struct dasd_ccw_req *
1224 dasd_eckd_analysis_ccw(struct dasd_device *device)
1225 {
1226 struct dasd_eckd_private *private;
1227 struct eckd_count *count_data;
1228 struct LO_eckd_data *LO_data;
1229 struct dasd_ccw_req *cqr;
1230 struct ccw1 *ccw;
1231 int cplength, datasize;
1232 int i;
1233
1234 private = (struct dasd_eckd_private *) device->private;
1235
1236 cplength = 8;
1237 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1238 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1239 if (IS_ERR(cqr))
1240 return cqr;
1241 ccw = cqr->cpaddr;
1242 /* Define extent for the first 3 tracks. */
1243 define_extent(ccw++, cqr->data, 0, 2,
1244 DASD_ECKD_CCW_READ_COUNT, device);
1245 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1246 /* Locate record for the first 4 records on track 0. */
1247 ccw[-1].flags |= CCW_FLAG_CC;
1248 locate_record(ccw++, LO_data++, 0, 0, 4,
1249 DASD_ECKD_CCW_READ_COUNT, device, 0);
1250
1251 count_data = private->count_area;
1252 for (i = 0; i < 4; i++) {
1253 ccw[-1].flags |= CCW_FLAG_CC;
1254 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1255 ccw->flags = 0;
1256 ccw->count = 8;
1257 ccw->cda = (__u32)(addr_t) count_data;
1258 ccw++;
1259 count_data++;
1260 }
1261
1262 /* Locate record for the first record on track 2. */
1263 ccw[-1].flags |= CCW_FLAG_CC;
1264 locate_record(ccw++, LO_data++, 2, 0, 1,
1265 DASD_ECKD_CCW_READ_COUNT, device, 0);
1266 /* Read count ccw. */
1267 ccw[-1].flags |= CCW_FLAG_CC;
1268 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1269 ccw->flags = 0;
1270 ccw->count = 8;
1271 ccw->cda = (__u32)(addr_t) count_data;
1272
1273 cqr->block = NULL;
1274 cqr->startdev = device;
1275 cqr->memdev = device;
1276 cqr->retries = 255;
1277 cqr->buildclk = get_clock();
1278 cqr->status = DASD_CQR_FILLED;
1279 return cqr;
1280 }
1281
1282 /* differentiate between 'no record found' and any other error */
1283 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1284 {
1285 char *sense;
1286 if (init_cqr->status == DASD_CQR_DONE)
1287 return INIT_CQR_OK;
1288 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1289 init_cqr->status == DASD_CQR_FAILED) {
1290 sense = dasd_get_sense(&init_cqr->irb);
1291 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1292 return INIT_CQR_UNFORMATTED;
1293 else
1294 return INIT_CQR_ERROR;
1295 } else
1296 return INIT_CQR_ERROR;
1297 }
1298
1299 /*
1300 * This is the callback function for the init_analysis cqr. It saves
1301 * the status of the initial analysis ccw before it frees it and kicks
1302 * the device to continue the startup sequence. This will call
1303 * dasd_eckd_do_analysis again (if the devices has not been marked
1304 * for deletion in the meantime).
1305 */
1306 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1307 void *data)
1308 {
1309 struct dasd_eckd_private *private;
1310 struct dasd_device *device;
1311
1312 device = init_cqr->startdev;
1313 private = (struct dasd_eckd_private *) device->private;
1314 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1315 dasd_sfree_request(init_cqr, device);
1316 dasd_kick_device(device);
1317 }
1318
1319 static int dasd_eckd_start_analysis(struct dasd_block *block)
1320 {
1321 struct dasd_eckd_private *private;
1322 struct dasd_ccw_req *init_cqr;
1323
1324 private = (struct dasd_eckd_private *) block->base->private;
1325 init_cqr = dasd_eckd_analysis_ccw(block->base);
1326 if (IS_ERR(init_cqr))
1327 return PTR_ERR(init_cqr);
1328 init_cqr->callback = dasd_eckd_analysis_callback;
1329 init_cqr->callback_data = NULL;
1330 init_cqr->expires = 5*HZ;
1331 /* first try without ERP, so we can later handle unformatted
1332 * devices as special case
1333 */
1334 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1335 init_cqr->retries = 0;
1336 dasd_add_request_head(init_cqr);
1337 return -EAGAIN;
1338 }
1339
1340 static int dasd_eckd_end_analysis(struct dasd_block *block)
1341 {
1342 struct dasd_device *device;
1343 struct dasd_eckd_private *private;
1344 struct eckd_count *count_area;
1345 unsigned int sb, blk_per_trk;
1346 int status, i;
1347 struct dasd_ccw_req *init_cqr;
1348
1349 device = block->base;
1350 private = (struct dasd_eckd_private *) device->private;
1351 status = private->init_cqr_status;
1352 private->init_cqr_status = -1;
1353 if (status == INIT_CQR_ERROR) {
1354 /* try again, this time with full ERP */
1355 init_cqr = dasd_eckd_analysis_ccw(device);
1356 dasd_sleep_on(init_cqr);
1357 status = dasd_eckd_analysis_evaluation(init_cqr);
1358 dasd_sfree_request(init_cqr, device);
1359 }
1360
1361 if (status == INIT_CQR_UNFORMATTED) {
1362 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1363 return -EMEDIUMTYPE;
1364 } else if (status == INIT_CQR_ERROR) {
1365 dev_err(&device->cdev->dev,
1366 "Detecting the DASD disk layout failed because "
1367 "of an I/O error\n");
1368 return -EIO;
1369 }
1370
1371 private->uses_cdl = 1;
1372 /* Check Track 0 for Compatible Disk Layout */
1373 count_area = NULL;
1374 for (i = 0; i < 3; i++) {
1375 if (private->count_area[i].kl != 4 ||
1376 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1377 private->uses_cdl = 0;
1378 break;
1379 }
1380 }
1381 if (i == 3)
1382 count_area = &private->count_area[4];
1383
1384 if (private->uses_cdl == 0) {
1385 for (i = 0; i < 5; i++) {
1386 if ((private->count_area[i].kl != 0) ||
1387 (private->count_area[i].dl !=
1388 private->count_area[0].dl))
1389 break;
1390 }
1391 if (i == 5)
1392 count_area = &private->count_area[0];
1393 } else {
1394 if (private->count_area[3].record == 1)
1395 dev_warn(&device->cdev->dev,
1396 "Track 0 has no records following the VTOC\n");
1397 }
1398 if (count_area != NULL && count_area->kl == 0) {
1399 /* we found notthing violating our disk layout */
1400 if (dasd_check_blocksize(count_area->dl) == 0)
1401 block->bp_block = count_area->dl;
1402 }
1403 if (block->bp_block == 0) {
1404 dev_warn(&device->cdev->dev,
1405 "The disk layout of the DASD is not supported\n");
1406 return -EMEDIUMTYPE;
1407 }
1408 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1409 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1410 block->s2b_shift++;
1411
1412 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
1413 block->blocks = (private->real_cyl *
1414 private->rdc_data.trk_per_cyl *
1415 blk_per_trk);
1416
1417 dev_info(&device->cdev->dev,
1418 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1419 "%s\n", (block->bp_block >> 10),
1420 ((private->real_cyl *
1421 private->rdc_data.trk_per_cyl *
1422 blk_per_trk * (block->bp_block >> 9)) >> 1),
1423 ((blk_per_trk * block->bp_block) >> 10),
1424 private->uses_cdl ?
1425 "compatible disk layout" : "linux disk layout");
1426
1427 return 0;
1428 }
1429
1430 static int dasd_eckd_do_analysis(struct dasd_block *block)
1431 {
1432 struct dasd_eckd_private *private;
1433
1434 private = (struct dasd_eckd_private *) block->base->private;
1435 if (private->init_cqr_status < 0)
1436 return dasd_eckd_start_analysis(block);
1437 else
1438 return dasd_eckd_end_analysis(block);
1439 }
1440
1441 static int dasd_eckd_ready_to_online(struct dasd_device *device)
1442 {
1443 return dasd_alias_add_device(device);
1444 };
1445
1446 static int dasd_eckd_online_to_ready(struct dasd_device *device)
1447 {
1448 return dasd_alias_remove_device(device);
1449 };
1450
1451 static int
1452 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1453 {
1454 struct dasd_eckd_private *private;
1455
1456 private = (struct dasd_eckd_private *) block->base->private;
1457 if (dasd_check_blocksize(block->bp_block) == 0) {
1458 geo->sectors = recs_per_track(&private->rdc_data,
1459 0, block->bp_block);
1460 }
1461 geo->cylinders = private->rdc_data.no_cyl;
1462 geo->heads = private->rdc_data.trk_per_cyl;
1463 return 0;
1464 }
1465
1466 static struct dasd_ccw_req *
1467 dasd_eckd_format_device(struct dasd_device * device,
1468 struct format_data_t * fdata)
1469 {
1470 struct dasd_eckd_private *private;
1471 struct dasd_ccw_req *fcp;
1472 struct eckd_count *ect;
1473 struct ccw1 *ccw;
1474 void *data;
1475 int rpt;
1476 struct ch_t address;
1477 int cplength, datasize;
1478 int i;
1479 int intensity = 0;
1480 int r0_perm;
1481
1482 private = (struct dasd_eckd_private *) device->private;
1483 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
1484 set_ch_t(&address,
1485 fdata->start_unit / private->rdc_data.trk_per_cyl,
1486 fdata->start_unit % private->rdc_data.trk_per_cyl);
1487
1488 /* Sanity checks. */
1489 if (fdata->start_unit >=
1490 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
1491 dev_warn(&device->cdev->dev, "Start track number %d used in "
1492 "formatting is too big\n", fdata->start_unit);
1493 return ERR_PTR(-EINVAL);
1494 }
1495 if (fdata->start_unit > fdata->stop_unit) {
1496 dev_warn(&device->cdev->dev, "Start track %d used in "
1497 "formatting exceeds end track\n", fdata->start_unit);
1498 return ERR_PTR(-EINVAL);
1499 }
1500 if (dasd_check_blocksize(fdata->blksize) != 0) {
1501 dev_warn(&device->cdev->dev,
1502 "The DASD cannot be formatted with block size %d\n",
1503 fdata->blksize);
1504 return ERR_PTR(-EINVAL);
1505 }
1506
1507 /*
1508 * fdata->intensity is a bit string that tells us what to do:
1509 * Bit 0: write record zero
1510 * Bit 1: write home address, currently not supported
1511 * Bit 2: invalidate tracks
1512 * Bit 3: use OS/390 compatible disk layout (cdl)
1513 * Bit 4: do not allow storage subsystem to modify record zero
1514 * Only some bit combinations do make sense.
1515 */
1516 if (fdata->intensity & 0x10) {
1517 r0_perm = 0;
1518 intensity = fdata->intensity & ~0x10;
1519 } else {
1520 r0_perm = 1;
1521 intensity = fdata->intensity;
1522 }
1523 switch (intensity) {
1524 case 0x00: /* Normal format */
1525 case 0x08: /* Normal format, use cdl. */
1526 cplength = 2 + rpt;
1527 datasize = sizeof(struct DE_eckd_data) +
1528 sizeof(struct LO_eckd_data) +
1529 rpt * sizeof(struct eckd_count);
1530 break;
1531 case 0x01: /* Write record zero and format track. */
1532 case 0x09: /* Write record zero and format track, use cdl. */
1533 cplength = 3 + rpt;
1534 datasize = sizeof(struct DE_eckd_data) +
1535 sizeof(struct LO_eckd_data) +
1536 sizeof(struct eckd_count) +
1537 rpt * sizeof(struct eckd_count);
1538 break;
1539 case 0x04: /* Invalidate track. */
1540 case 0x0c: /* Invalidate track, use cdl. */
1541 cplength = 3;
1542 datasize = sizeof(struct DE_eckd_data) +
1543 sizeof(struct LO_eckd_data) +
1544 sizeof(struct eckd_count);
1545 break;
1546 default:
1547 dev_warn(&device->cdev->dev, "An I/O control call used "
1548 "incorrect flags 0x%x\n", fdata->intensity);
1549 return ERR_PTR(-EINVAL);
1550 }
1551 /* Allocate the format ccw request. */
1552 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1553 if (IS_ERR(fcp))
1554 return fcp;
1555
1556 data = fcp->data;
1557 ccw = fcp->cpaddr;
1558
1559 switch (intensity & ~0x08) {
1560 case 0x00: /* Normal format. */
1561 define_extent(ccw++, (struct DE_eckd_data *) data,
1562 fdata->start_unit, fdata->start_unit,
1563 DASD_ECKD_CCW_WRITE_CKD, device);
1564 /* grant subsystem permission to format R0 */
1565 if (r0_perm)
1566 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1567 data += sizeof(struct DE_eckd_data);
1568 ccw[-1].flags |= CCW_FLAG_CC;
1569 locate_record(ccw++, (struct LO_eckd_data *) data,
1570 fdata->start_unit, 0, rpt,
1571 DASD_ECKD_CCW_WRITE_CKD, device,
1572 fdata->blksize);
1573 data += sizeof(struct LO_eckd_data);
1574 break;
1575 case 0x01: /* Write record zero + format track. */
1576 define_extent(ccw++, (struct DE_eckd_data *) data,
1577 fdata->start_unit, fdata->start_unit,
1578 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1579 device);
1580 data += sizeof(struct DE_eckd_data);
1581 ccw[-1].flags |= CCW_FLAG_CC;
1582 locate_record(ccw++, (struct LO_eckd_data *) data,
1583 fdata->start_unit, 0, rpt + 1,
1584 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
1585 device->block->bp_block);
1586 data += sizeof(struct LO_eckd_data);
1587 break;
1588 case 0x04: /* Invalidate track. */
1589 define_extent(ccw++, (struct DE_eckd_data *) data,
1590 fdata->start_unit, fdata->start_unit,
1591 DASD_ECKD_CCW_WRITE_CKD, device);
1592 data += sizeof(struct DE_eckd_data);
1593 ccw[-1].flags |= CCW_FLAG_CC;
1594 locate_record(ccw++, (struct LO_eckd_data *) data,
1595 fdata->start_unit, 0, 1,
1596 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1597 data += sizeof(struct LO_eckd_data);
1598 break;
1599 }
1600 if (intensity & 0x01) { /* write record zero */
1601 ect = (struct eckd_count *) data;
1602 data += sizeof(struct eckd_count);
1603 ect->cyl = address.cyl;
1604 ect->head = address.head;
1605 ect->record = 0;
1606 ect->kl = 0;
1607 ect->dl = 8;
1608 ccw[-1].flags |= CCW_FLAG_CC;
1609 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1610 ccw->flags = CCW_FLAG_SLI;
1611 ccw->count = 8;
1612 ccw->cda = (__u32)(addr_t) ect;
1613 ccw++;
1614 }
1615 if ((intensity & ~0x08) & 0x04) { /* erase track */
1616 ect = (struct eckd_count *) data;
1617 data += sizeof(struct eckd_count);
1618 ect->cyl = address.cyl;
1619 ect->head = address.head;
1620 ect->record = 1;
1621 ect->kl = 0;
1622 ect->dl = 0;
1623 ccw[-1].flags |= CCW_FLAG_CC;
1624 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1625 ccw->flags = CCW_FLAG_SLI;
1626 ccw->count = 8;
1627 ccw->cda = (__u32)(addr_t) ect;
1628 } else { /* write remaining records */
1629 for (i = 0; i < rpt; i++) {
1630 ect = (struct eckd_count *) data;
1631 data += sizeof(struct eckd_count);
1632 ect->cyl = address.cyl;
1633 ect->head = address.head;
1634 ect->record = i + 1;
1635 ect->kl = 0;
1636 ect->dl = fdata->blksize;
1637 /* Check for special tracks 0-1 when formatting CDL */
1638 if ((intensity & 0x08) &&
1639 fdata->start_unit == 0) {
1640 if (i < 3) {
1641 ect->kl = 4;
1642 ect->dl = sizes_trk0[i] - 4;
1643 }
1644 }
1645 if ((intensity & 0x08) &&
1646 fdata->start_unit == 1) {
1647 ect->kl = 44;
1648 ect->dl = LABEL_SIZE - 44;
1649 }
1650 ccw[-1].flags |= CCW_FLAG_CC;
1651 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1652 ccw->flags = CCW_FLAG_SLI;
1653 ccw->count = 8;
1654 ccw->cda = (__u32)(addr_t) ect;
1655 ccw++;
1656 }
1657 }
1658 fcp->startdev = device;
1659 fcp->memdev = device;
1660 fcp->retries = 256;
1661 fcp->buildclk = get_clock();
1662 fcp->status = DASD_CQR_FILLED;
1663 return fcp;
1664 }
1665
1666 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1667 {
1668 cqr->status = DASD_CQR_FILLED;
1669 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1670 dasd_eckd_reset_ccw_to_base_io(cqr);
1671 cqr->startdev = cqr->block->base;
1672 }
1673 };
1674
1675 static dasd_erp_fn_t
1676 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1677 {
1678 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1679 struct ccw_device *cdev = device->cdev;
1680
1681 switch (cdev->id.cu_type) {
1682 case 0x3990:
1683 case 0x2105:
1684 case 0x2107:
1685 case 0x1750:
1686 return dasd_3990_erp_action;
1687 case 0x9343:
1688 case 0x3880:
1689 default:
1690 return dasd_default_erp_action;
1691 }
1692 }
1693
1694 static dasd_erp_fn_t
1695 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1696 {
1697 return dasd_default_erp_postaction;
1698 }
1699
1700
1701 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1702 struct irb *irb)
1703 {
1704 char mask;
1705 char *sense = NULL;
1706
1707 /* first of all check for state change pending interrupt */
1708 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
1709 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
1710 dasd_generic_handle_state_change(device);
1711 return;
1712 }
1713
1714 /* summary unit check */
1715 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
1716 (irb->ecw[7] == 0x0D)) {
1717 dasd_alias_handle_summary_unit_check(device, irb);
1718 return;
1719 }
1720
1721 sense = dasd_get_sense(irb);
1722 /* service information message SIM */
1723 if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1724 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1725 dasd_3990_erp_handle_sim(device, sense);
1726 dasd_schedule_device_bh(device);
1727 return;
1728 }
1729
1730 if ((scsw_cc(&irb->scsw) == 1) &&
1731 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1732 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1733 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
1734 /* fake irb do nothing, they are handled elsewhere */
1735 dasd_schedule_device_bh(device);
1736 return;
1737 }
1738
1739 if (!sense) {
1740 /* just report other unsolicited interrupts */
1741 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1742 "unsolicited interrupt received");
1743 } else {
1744 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1745 "unsolicited interrupt received "
1746 "(sense available)");
1747 device->discipline->dump_sense_dbf(device, irb, "unsolicited");
1748 }
1749
1750 dasd_schedule_device_bh(device);
1751 return;
1752 };
1753
1754
1755 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1756 struct dasd_device *startdev,
1757 struct dasd_block *block,
1758 struct request *req,
1759 sector_t first_rec,
1760 sector_t last_rec,
1761 sector_t first_trk,
1762 sector_t last_trk,
1763 unsigned int first_offs,
1764 unsigned int last_offs,
1765 unsigned int blk_per_trk,
1766 unsigned int blksize)
1767 {
1768 struct dasd_eckd_private *private;
1769 unsigned long *idaws;
1770 struct LO_eckd_data *LO_data;
1771 struct dasd_ccw_req *cqr;
1772 struct ccw1 *ccw;
1773 struct req_iterator iter;
1774 struct bio_vec *bv;
1775 char *dst;
1776 unsigned int off;
1777 int count, cidaw, cplength, datasize;
1778 sector_t recid;
1779 unsigned char cmd, rcmd;
1780 int use_prefix;
1781 struct dasd_device *basedev;
1782
1783 basedev = block->base;
1784 private = (struct dasd_eckd_private *) basedev->private;
1785 if (rq_data_dir(req) == READ)
1786 cmd = DASD_ECKD_CCW_READ_MT;
1787 else if (rq_data_dir(req) == WRITE)
1788 cmd = DASD_ECKD_CCW_WRITE_MT;
1789 else
1790 return ERR_PTR(-EINVAL);
1791
1792 /* Check struct bio and count the number of blocks for the request. */
1793 count = 0;
1794 cidaw = 0;
1795 rq_for_each_segment(bv, req, iter) {
1796 if (bv->bv_len & (blksize - 1))
1797 /* Eckd can only do full blocks. */
1798 return ERR_PTR(-EINVAL);
1799 count += bv->bv_len >> (block->s2b_shift + 9);
1800 #if defined(CONFIG_64BIT)
1801 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
1802 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1803 #endif
1804 }
1805 /* Paranoia. */
1806 if (count != last_rec - first_rec + 1)
1807 return ERR_PTR(-EINVAL);
1808
1809 /* use the prefix command if available */
1810 use_prefix = private->features.feature[8] & 0x01;
1811 if (use_prefix) {
1812 /* 1x prefix + number of blocks */
1813 cplength = 2 + count;
1814 /* 1x prefix + cidaws*sizeof(long) */
1815 datasize = sizeof(struct PFX_eckd_data) +
1816 sizeof(struct LO_eckd_data) +
1817 cidaw * sizeof(unsigned long);
1818 } else {
1819 /* 1x define extent + 1x locate record + number of blocks */
1820 cplength = 2 + count;
1821 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1822 datasize = sizeof(struct DE_eckd_data) +
1823 sizeof(struct LO_eckd_data) +
1824 cidaw * sizeof(unsigned long);
1825 }
1826 /* Find out the number of additional locate record ccws for cdl. */
1827 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1828 if (last_rec >= 2*blk_per_trk)
1829 count = 2*blk_per_trk - first_rec;
1830 cplength += count;
1831 datasize += count*sizeof(struct LO_eckd_data);
1832 }
1833 /* Allocate the ccw request. */
1834 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1835 startdev);
1836 if (IS_ERR(cqr))
1837 return cqr;
1838 ccw = cqr->cpaddr;
1839 /* First ccw is define extent or prefix. */
1840 if (use_prefix) {
1841 if (prefix(ccw++, cqr->data, first_trk,
1842 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1843 /* Clock not in sync and XRC is enabled.
1844 * Try again later.
1845 */
1846 dasd_sfree_request(cqr, startdev);
1847 return ERR_PTR(-EAGAIN);
1848 }
1849 idaws = (unsigned long *) (cqr->data +
1850 sizeof(struct PFX_eckd_data));
1851 } else {
1852 if (define_extent(ccw++, cqr->data, first_trk,
1853 last_trk, cmd, startdev) == -EAGAIN) {
1854 /* Clock not in sync and XRC is enabled.
1855 * Try again later.
1856 */
1857 dasd_sfree_request(cqr, startdev);
1858 return ERR_PTR(-EAGAIN);
1859 }
1860 idaws = (unsigned long *) (cqr->data +
1861 sizeof(struct DE_eckd_data));
1862 }
1863 /* Build locate_record+read/write/ccws. */
1864 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1865 recid = first_rec;
1866 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1867 /* Only standard blocks so there is just one locate record. */
1868 ccw[-1].flags |= CCW_FLAG_CC;
1869 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1870 last_rec - recid + 1, cmd, basedev, blksize);
1871 }
1872 rq_for_each_segment(bv, req, iter) {
1873 dst = page_address(bv->bv_page) + bv->bv_offset;
1874 if (dasd_page_cache) {
1875 char *copy = kmem_cache_alloc(dasd_page_cache,
1876 GFP_DMA | __GFP_NOWARN);
1877 if (copy && rq_data_dir(req) == WRITE)
1878 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1879 if (copy)
1880 dst = copy + bv->bv_offset;
1881 }
1882 for (off = 0; off < bv->bv_len; off += blksize) {
1883 sector_t trkid = recid;
1884 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1885 rcmd = cmd;
1886 count = blksize;
1887 /* Locate record for cdl special block ? */
1888 if (private->uses_cdl && recid < 2*blk_per_trk) {
1889 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1890 rcmd |= 0x8;
1891 count = dasd_eckd_cdl_reclen(recid);
1892 if (count < blksize &&
1893 rq_data_dir(req) == READ)
1894 memset(dst + count, 0xe5,
1895 blksize - count);
1896 }
1897 ccw[-1].flags |= CCW_FLAG_CC;
1898 locate_record(ccw++, LO_data++,
1899 trkid, recoffs + 1,
1900 1, rcmd, basedev, count);
1901 }
1902 /* Locate record for standard blocks ? */
1903 if (private->uses_cdl && recid == 2*blk_per_trk) {
1904 ccw[-1].flags |= CCW_FLAG_CC;
1905 locate_record(ccw++, LO_data++,
1906 trkid, recoffs + 1,
1907 last_rec - recid + 1,
1908 cmd, basedev, count);
1909 }
1910 /* Read/write ccw. */
1911 ccw[-1].flags |= CCW_FLAG_CC;
1912 ccw->cmd_code = rcmd;
1913 ccw->count = count;
1914 if (idal_is_needed(dst, blksize)) {
1915 ccw->cda = (__u32)(addr_t) idaws;
1916 ccw->flags = CCW_FLAG_IDA;
1917 idaws = idal_create_words(idaws, dst, blksize);
1918 } else {
1919 ccw->cda = (__u32)(addr_t) dst;
1920 ccw->flags = 0;
1921 }
1922 ccw++;
1923 dst += blksize;
1924 recid++;
1925 }
1926 }
1927 if (blk_noretry_request(req) ||
1928 block->base->features & DASD_FEATURE_FAILFAST)
1929 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1930 cqr->startdev = startdev;
1931 cqr->memdev = startdev;
1932 cqr->block = block;
1933 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1934 cqr->lpm = private->path_data.ppm;
1935 cqr->retries = 256;
1936 cqr->buildclk = get_clock();
1937 cqr->status = DASD_CQR_FILLED;
1938 return cqr;
1939 }
1940
1941 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1942 struct dasd_device *startdev,
1943 struct dasd_block *block,
1944 struct request *req,
1945 sector_t first_rec,
1946 sector_t last_rec,
1947 sector_t first_trk,
1948 sector_t last_trk,
1949 unsigned int first_offs,
1950 unsigned int last_offs,
1951 unsigned int blk_per_trk,
1952 unsigned int blksize)
1953 {
1954 struct dasd_eckd_private *private;
1955 unsigned long *idaws;
1956 struct dasd_ccw_req *cqr;
1957 struct ccw1 *ccw;
1958 struct req_iterator iter;
1959 struct bio_vec *bv;
1960 char *dst, *idaw_dst;
1961 unsigned int cidaw, cplength, datasize;
1962 unsigned int tlf;
1963 sector_t recid;
1964 unsigned char cmd;
1965 struct dasd_device *basedev;
1966 unsigned int trkcount, count, count_to_trk_end;
1967 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
1968 unsigned char new_track, end_idaw;
1969 sector_t trkid;
1970 unsigned int recoffs;
1971
1972 basedev = block->base;
1973 private = (struct dasd_eckd_private *) basedev->private;
1974 if (rq_data_dir(req) == READ)
1975 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
1976 else if (rq_data_dir(req) == WRITE)
1977 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
1978 else
1979 return ERR_PTR(-EINVAL);
1980
1981 /* Track based I/O needs IDAWs for each page, and not just for
1982 * 64 bit addresses. We need additional idals for pages
1983 * that get filled from two tracks, so we use the number
1984 * of records as upper limit.
1985 */
1986 cidaw = last_rec - first_rec + 1;
1987 trkcount = last_trk - first_trk + 1;
1988
1989 /* 1x prefix + one read/write ccw per track */
1990 cplength = 1 + trkcount;
1991
1992 /* on 31-bit we need space for two 32 bit addresses per page
1993 * on 64-bit one 64 bit address
1994 */
1995 datasize = sizeof(struct PFX_eckd_data) +
1996 cidaw * sizeof(unsigned long long);
1997
1998 /* Allocate the ccw request. */
1999 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2000 startdev);
2001 if (IS_ERR(cqr))
2002 return cqr;
2003 ccw = cqr->cpaddr;
2004 /* transfer length factor: how many bytes to read from the last track */
2005 if (first_trk == last_trk)
2006 tlf = last_offs - first_offs + 1;
2007 else
2008 tlf = last_offs + 1;
2009 tlf *= blksize;
2010
2011 if (prefix_LRE(ccw++, cqr->data, first_trk,
2012 last_trk, cmd, basedev, startdev,
2013 1 /* format */, first_offs + 1,
2014 trkcount, blksize,
2015 tlf) == -EAGAIN) {
2016 /* Clock not in sync and XRC is enabled.
2017 * Try again later.
2018 */
2019 dasd_sfree_request(cqr, startdev);
2020 return ERR_PTR(-EAGAIN);
2021 }
2022
2023 /*
2024 * The translation of request into ccw programs must meet the
2025 * following conditions:
2026 * - all idaws but the first and the last must address full pages
2027 * (or 2K blocks on 31-bit)
2028 * - the scope of a ccw and it's idal ends with the track boundaries
2029 */
2030 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2031 recid = first_rec;
2032 new_track = 1;
2033 end_idaw = 0;
2034 len_to_track_end = 0;
2035 idaw_dst = 0;
2036 idaw_len = 0;
2037 rq_for_each_segment(bv, req, iter) {
2038 dst = page_address(bv->bv_page) + bv->bv_offset;
2039 seg_len = bv->bv_len;
2040 while (seg_len) {
2041 if (new_track) {
2042 trkid = recid;
2043 recoffs = sector_div(trkid, blk_per_trk);
2044 count_to_trk_end = blk_per_trk - recoffs;
2045 count = min((last_rec - recid + 1),
2046 (sector_t)count_to_trk_end);
2047 len_to_track_end = count * blksize;
2048 ccw[-1].flags |= CCW_FLAG_CC;
2049 ccw->cmd_code = cmd;
2050 ccw->count = len_to_track_end;
2051 ccw->cda = (__u32)(addr_t)idaws;
2052 ccw->flags = CCW_FLAG_IDA;
2053 ccw++;
2054 recid += count;
2055 new_track = 0;
2056 /* first idaw for a ccw may start anywhere */
2057 if (!idaw_dst)
2058 idaw_dst = dst;
2059 }
2060 /* If we start a new idaw, we must make sure that it
2061 * starts on an IDA_BLOCK_SIZE boundary.
2062 * If we continue an idaw, we must make sure that the
2063 * current segment begins where the so far accumulated
2064 * idaw ends
2065 */
2066 if (!idaw_dst) {
2067 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2068 dasd_sfree_request(cqr, startdev);
2069 return ERR_PTR(-ERANGE);
2070 } else
2071 idaw_dst = dst;
2072 }
2073 if ((idaw_dst + idaw_len) != dst) {
2074 dasd_sfree_request(cqr, startdev);
2075 return ERR_PTR(-ERANGE);
2076 }
2077 part_len = min(seg_len, len_to_track_end);
2078 seg_len -= part_len;
2079 dst += part_len;
2080 idaw_len += part_len;
2081 len_to_track_end -= part_len;
2082 /* collected memory area ends on an IDA_BLOCK border,
2083 * -> create an idaw
2084 * idal_create_words will handle cases where idaw_len
2085 * is larger then IDA_BLOCK_SIZE
2086 */
2087 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2088 end_idaw = 1;
2089 /* We also need to end the idaw at track end */
2090 if (!len_to_track_end) {
2091 new_track = 1;
2092 end_idaw = 1;
2093 }
2094 if (end_idaw) {
2095 idaws = idal_create_words(idaws, idaw_dst,
2096 idaw_len);
2097 idaw_dst = 0;
2098 idaw_len = 0;
2099 end_idaw = 0;
2100 }
2101 }
2102 }
2103
2104 if (blk_noretry_request(req) ||
2105 block->base->features & DASD_FEATURE_FAILFAST)
2106 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2107 cqr->startdev = startdev;
2108 cqr->memdev = startdev;
2109 cqr->block = block;
2110 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2111 cqr->lpm = private->path_data.ppm;
2112 cqr->retries = 256;
2113 cqr->buildclk = get_clock();
2114 cqr->status = DASD_CQR_FILLED;
2115 return cqr;
2116 }
2117
2118 static int prepare_itcw(struct itcw *itcw,
2119 unsigned int trk, unsigned int totrk, int cmd,
2120 struct dasd_device *basedev,
2121 struct dasd_device *startdev,
2122 unsigned int rec_on_trk, int count,
2123 unsigned int blksize,
2124 unsigned int total_data_size,
2125 unsigned int tlf,
2126 unsigned int blk_per_trk)
2127 {
2128 struct PFX_eckd_data pfxdata;
2129 struct dasd_eckd_private *basepriv, *startpriv;
2130 struct DE_eckd_data *dedata;
2131 struct LRE_eckd_data *lredata;
2132 struct dcw *dcw;
2133
2134 u32 begcyl, endcyl;
2135 u16 heads, beghead, endhead;
2136 u8 pfx_cmd;
2137
2138 int rc = 0;
2139 int sector = 0;
2140 int dn, d;
2141
2142
2143 /* setup prefix data */
2144 basepriv = (struct dasd_eckd_private *) basedev->private;
2145 startpriv = (struct dasd_eckd_private *) startdev->private;
2146 dedata = &pfxdata.define_extent;
2147 lredata = &pfxdata.locate_record;
2148
2149 memset(&pfxdata, 0, sizeof(pfxdata));
2150 pfxdata.format = 1; /* PFX with LRE */
2151 pfxdata.base_address = basepriv->ned->unit_addr;
2152 pfxdata.base_lss = basepriv->ned->ID;
2153 pfxdata.validity.define_extent = 1;
2154
2155 /* private uid is kept up to date, conf_data may be outdated */
2156 if (startpriv->uid.type != UA_BASE_DEVICE) {
2157 pfxdata.validity.verify_base = 1;
2158 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2159 pfxdata.validity.hyper_pav = 1;
2160 }
2161
2162 switch (cmd) {
2163 case DASD_ECKD_CCW_READ_TRACK_DATA:
2164 dedata->mask.perm = 0x1;
2165 dedata->attributes.operation = basepriv->attrib.operation;
2166 dedata->blk_size = blksize;
2167 dedata->ga_extended |= 0x42;
2168 lredata->operation.orientation = 0x0;
2169 lredata->operation.operation = 0x0C;
2170 lredata->auxiliary.check_bytes = 0x01;
2171 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2172 break;
2173 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2174 dedata->mask.perm = 0x02;
2175 dedata->attributes.operation = basepriv->attrib.operation;
2176 dedata->blk_size = blksize;
2177 rc = check_XRC_on_prefix(&pfxdata, basedev);
2178 dedata->ga_extended |= 0x42;
2179 lredata->operation.orientation = 0x0;
2180 lredata->operation.operation = 0x3F;
2181 lredata->extended_operation = 0x23;
2182 lredata->auxiliary.check_bytes = 0x2;
2183 pfx_cmd = DASD_ECKD_CCW_PFX;
2184 break;
2185 default:
2186 DBF_DEV_EVENT(DBF_ERR, basedev,
2187 "prepare itcw, unknown opcode 0x%x", cmd);
2188 BUG();
2189 break;
2190 }
2191 if (rc)
2192 return rc;
2193
2194 dedata->attributes.mode = 0x3; /* ECKD */
2195
2196 heads = basepriv->rdc_data.trk_per_cyl;
2197 begcyl = trk / heads;
2198 beghead = trk % heads;
2199 endcyl = totrk / heads;
2200 endhead = totrk % heads;
2201
2202 /* check for sequential prestage - enhance cylinder range */
2203 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2204 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2205
2206 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2207 endcyl += basepriv->attrib.nr_cyl;
2208 else
2209 endcyl = (basepriv->real_cyl - 1);
2210 }
2211
2212 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2213 set_ch_t(&dedata->end_ext, endcyl, endhead);
2214
2215 dedata->ep_format = 0x20; /* records per track is valid */
2216 dedata->ep_rec_per_track = blk_per_trk;
2217
2218 if (rec_on_trk) {
2219 switch (basepriv->rdc_data.dev_type) {
2220 case 0x3390:
2221 dn = ceil_quot(blksize + 6, 232);
2222 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2223 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2224 break;
2225 case 0x3380:
2226 d = 7 + ceil_quot(blksize + 12, 32);
2227 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2228 break;
2229 }
2230 }
2231
2232 lredata->auxiliary.length_valid = 1;
2233 lredata->auxiliary.length_scope = 1;
2234 lredata->auxiliary.imbedded_ccw_valid = 1;
2235 lredata->length = tlf;
2236 lredata->imbedded_ccw = cmd;
2237 lredata->count = count;
2238 lredata->sector = sector;
2239 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2240 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2241 lredata->search_arg.head = lredata->seek_addr.head;
2242 lredata->search_arg.record = rec_on_trk;
2243
2244 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2245 &pfxdata, sizeof(pfxdata), total_data_size);
2246
2247 return rc;
2248 }
2249
2250 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2251 struct dasd_device *startdev,
2252 struct dasd_block *block,
2253 struct request *req,
2254 sector_t first_rec,
2255 sector_t last_rec,
2256 sector_t first_trk,
2257 sector_t last_trk,
2258 unsigned int first_offs,
2259 unsigned int last_offs,
2260 unsigned int blk_per_trk,
2261 unsigned int blksize)
2262 {
2263 struct dasd_eckd_private *private;
2264 struct dasd_ccw_req *cqr;
2265 struct req_iterator iter;
2266 struct bio_vec *bv;
2267 char *dst;
2268 unsigned int trkcount, ctidaw;
2269 unsigned char cmd;
2270 struct dasd_device *basedev;
2271 unsigned int tlf;
2272 struct itcw *itcw;
2273 struct tidaw *last_tidaw = NULL;
2274 int itcw_op;
2275 size_t itcw_size;
2276
2277 basedev = block->base;
2278 private = (struct dasd_eckd_private *) basedev->private;
2279 if (rq_data_dir(req) == READ) {
2280 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2281 itcw_op = ITCW_OP_READ;
2282 } else if (rq_data_dir(req) == WRITE) {
2283 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2284 itcw_op = ITCW_OP_WRITE;
2285 } else
2286 return ERR_PTR(-EINVAL);
2287
2288 /* trackbased I/O needs address all memory via TIDAWs,
2289 * not just for 64 bit addresses. This allows us to map
2290 * each segment directly to one tidaw.
2291 */
2292 trkcount = last_trk - first_trk + 1;
2293 ctidaw = 0;
2294 rq_for_each_segment(bv, req, iter) {
2295 ++ctidaw;
2296 }
2297
2298 /* Allocate the ccw request. */
2299 itcw_size = itcw_calc_size(0, ctidaw, 0);
2300 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2301 if (IS_ERR(cqr))
2302 return cqr;
2303
2304 cqr->cpmode = 1;
2305 cqr->startdev = startdev;
2306 cqr->memdev = startdev;
2307 cqr->block = block;
2308 cqr->expires = 100*HZ;
2309 cqr->buildclk = get_clock();
2310 cqr->status = DASD_CQR_FILLED;
2311 cqr->retries = 10;
2312
2313 /* transfer length factor: how many bytes to read from the last track */
2314 if (first_trk == last_trk)
2315 tlf = last_offs - first_offs + 1;
2316 else
2317 tlf = last_offs + 1;
2318 tlf *= blksize;
2319
2320 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2321 cqr->cpaddr = itcw_get_tcw(itcw);
2322
2323 if (prepare_itcw(itcw, first_trk, last_trk,
2324 cmd, basedev, startdev,
2325 first_offs + 1,
2326 trkcount, blksize,
2327 (last_rec - first_rec + 1) * blksize,
2328 tlf, blk_per_trk) == -EAGAIN) {
2329 /* Clock not in sync and XRC is enabled.
2330 * Try again later.
2331 */
2332 dasd_sfree_request(cqr, startdev);
2333 return ERR_PTR(-EAGAIN);
2334 }
2335
2336 /*
2337 * A tidaw can address 4k of memory, but must not cross page boundaries
2338 * We can let the block layer handle this by setting
2339 * blk_queue_segment_boundary to page boundaries and
2340 * blk_max_segment_size to page size when setting up the request queue.
2341 */
2342 rq_for_each_segment(bv, req, iter) {
2343 dst = page_address(bv->bv_page) + bv->bv_offset;
2344 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2345 if (IS_ERR(last_tidaw))
2346 return (struct dasd_ccw_req *)last_tidaw;
2347 }
2348
2349 last_tidaw->flags |= 0x80;
2350 itcw_finalize(itcw);
2351
2352 if (blk_noretry_request(req) ||
2353 block->base->features & DASD_FEATURE_FAILFAST)
2354 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2355 cqr->startdev = startdev;
2356 cqr->memdev = startdev;
2357 cqr->block = block;
2358 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2359 cqr->lpm = private->path_data.ppm;
2360 cqr->retries = 256;
2361 cqr->buildclk = get_clock();
2362 cqr->status = DASD_CQR_FILLED;
2363 return cqr;
2364 }
2365
2366 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2367 struct dasd_block *block,
2368 struct request *req)
2369 {
2370 int tpm, cmdrtd, cmdwtd;
2371 int use_prefix;
2372 #if defined(CONFIG_64BIT)
2373 int fcx_in_css, fcx_in_gneq, fcx_in_features;
2374 #endif
2375 struct dasd_eckd_private *private;
2376 struct dasd_device *basedev;
2377 sector_t first_rec, last_rec;
2378 sector_t first_trk, last_trk;
2379 unsigned int first_offs, last_offs;
2380 unsigned int blk_per_trk, blksize;
2381 int cdlspecial;
2382 struct dasd_ccw_req *cqr;
2383
2384 basedev = block->base;
2385 private = (struct dasd_eckd_private *) basedev->private;
2386
2387 /* Calculate number of blocks/records per track. */
2388 blksize = block->bp_block;
2389 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2390 if (blk_per_trk == 0)
2391 return ERR_PTR(-EINVAL);
2392 /* Calculate record id of first and last block. */
2393 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
2394 first_offs = sector_div(first_trk, blk_per_trk);
2395 last_rec = last_trk =
2396 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
2397 last_offs = sector_div(last_trk, blk_per_trk);
2398 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2399
2400 /* is transport mode supported? */
2401 #if defined(CONFIG_64BIT)
2402 fcx_in_css = css_general_characteristics.fcx;
2403 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2404 fcx_in_features = private->features.feature[40] & 0x80;
2405 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
2406 #else
2407 tpm = 0;
2408 #endif
2409
2410 /* is read track data and write track data in command mode supported? */
2411 cmdrtd = private->features.feature[9] & 0x20;
2412 cmdwtd = private->features.feature[12] & 0x40;
2413 use_prefix = private->features.feature[8] & 0x01;
2414
2415 cqr = NULL;
2416 if (cdlspecial || dasd_page_cache) {
2417 /* do nothing, just fall through to the cmd mode single case */
2418 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2419 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2420 first_rec, last_rec,
2421 first_trk, last_trk,
2422 first_offs, last_offs,
2423 blk_per_trk, blksize);
2424 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2425 cqr = NULL;
2426 } else if (use_prefix &&
2427 (((rq_data_dir(req) == READ) && cmdrtd) ||
2428 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2429 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2430 first_rec, last_rec,
2431 first_trk, last_trk,
2432 first_offs, last_offs,
2433 blk_per_trk, blksize);
2434 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2435 cqr = NULL;
2436 }
2437 if (!cqr)
2438 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2439 first_rec, last_rec,
2440 first_trk, last_trk,
2441 first_offs, last_offs,
2442 blk_per_trk, blksize);
2443 return cqr;
2444 }
2445
2446 static int
2447 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2448 {
2449 struct dasd_eckd_private *private;
2450 struct ccw1 *ccw;
2451 struct req_iterator iter;
2452 struct bio_vec *bv;
2453 char *dst, *cda;
2454 unsigned int blksize, blk_per_trk, off;
2455 sector_t recid;
2456 int status;
2457
2458 if (!dasd_page_cache)
2459 goto out;
2460 private = (struct dasd_eckd_private *) cqr->block->base->private;
2461 blksize = cqr->block->bp_block;
2462 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2463 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
2464 ccw = cqr->cpaddr;
2465 /* Skip over define extent & locate record. */
2466 ccw++;
2467 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2468 ccw++;
2469 rq_for_each_segment(bv, req, iter) {
2470 dst = page_address(bv->bv_page) + bv->bv_offset;
2471 for (off = 0; off < bv->bv_len; off += blksize) {
2472 /* Skip locate record. */
2473 if (private->uses_cdl && recid <= 2*blk_per_trk)
2474 ccw++;
2475 if (dst) {
2476 if (ccw->flags & CCW_FLAG_IDA)
2477 cda = *((char **)((addr_t) ccw->cda));
2478 else
2479 cda = (char *)((addr_t) ccw->cda);
2480 if (dst != cda) {
2481 if (rq_data_dir(req) == READ)
2482 memcpy(dst, cda, bv->bv_len);
2483 kmem_cache_free(dasd_page_cache,
2484 (void *)((addr_t)cda & PAGE_MASK));
2485 }
2486 dst = NULL;
2487 }
2488 ccw++;
2489 recid++;
2490 }
2491 }
2492 out:
2493 status = cqr->status == DASD_CQR_DONE;
2494 dasd_sfree_request(cqr, cqr->memdev);
2495 return status;
2496 }
2497
2498 /*
2499 * Modify ccw/tcw in cqr so it can be started on a base device.
2500 *
2501 * Note that this is not enough to restart the cqr!
2502 * Either reset cqr->startdev as well (summary unit check handling)
2503 * or restart via separate cqr (as in ERP handling).
2504 */
2505 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2506 {
2507 struct ccw1 *ccw;
2508 struct PFX_eckd_data *pfxdata;
2509 struct tcw *tcw;
2510 struct tccb *tccb;
2511 struct dcw *dcw;
2512
2513 if (cqr->cpmode == 1) {
2514 tcw = cqr->cpaddr;
2515 tccb = tcw_get_tccb(tcw);
2516 dcw = (struct dcw *)&tccb->tca[0];
2517 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
2518 pfxdata->validity.verify_base = 0;
2519 pfxdata->validity.hyper_pav = 0;
2520 } else {
2521 ccw = cqr->cpaddr;
2522 pfxdata = cqr->data;
2523 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2524 pfxdata->validity.verify_base = 0;
2525 pfxdata->validity.hyper_pav = 0;
2526 }
2527 }
2528 }
2529
2530 #define DASD_ECKD_CHANQ_MAX_SIZE 4
2531
2532 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2533 struct dasd_block *block,
2534 struct request *req)
2535 {
2536 struct dasd_eckd_private *private;
2537 struct dasd_device *startdev;
2538 unsigned long flags;
2539 struct dasd_ccw_req *cqr;
2540
2541 startdev = dasd_alias_get_start_dev(base);
2542 if (!startdev)
2543 startdev = base;
2544 private = (struct dasd_eckd_private *) startdev->private;
2545 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2546 return ERR_PTR(-EBUSY);
2547
2548 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2549 private->count++;
2550 cqr = dasd_eckd_build_cp(startdev, block, req);
2551 if (IS_ERR(cqr))
2552 private->count--;
2553 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2554 return cqr;
2555 }
2556
2557 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2558 struct request *req)
2559 {
2560 struct dasd_eckd_private *private;
2561 unsigned long flags;
2562
2563 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2564 private = (struct dasd_eckd_private *) cqr->memdev->private;
2565 private->count--;
2566 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2567 return dasd_eckd_free_cp(cqr, req);
2568 }
2569
2570 static int
2571 dasd_eckd_fill_info(struct dasd_device * device,
2572 struct dasd_information2_t * info)
2573 {
2574 struct dasd_eckd_private *private;
2575
2576 private = (struct dasd_eckd_private *) device->private;
2577 info->label_block = 2;
2578 info->FBA_layout = private->uses_cdl ? 0 : 1;
2579 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2580 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2581 memcpy(info->characteristics, &private->rdc_data,
2582 sizeof(struct dasd_eckd_characteristics));
2583 info->confdata_size = min((unsigned long)private->conf_len,
2584 sizeof(info->configuration_data));
2585 memcpy(info->configuration_data, private->conf_data,
2586 info->confdata_size);
2587 return 0;
2588 }
2589
2590 /*
2591 * SECTION: ioctl functions for eckd devices.
2592 */
2593
2594 /*
2595 * Release device ioctl.
2596 * Buils a channel programm to releases a prior reserved
2597 * (see dasd_eckd_reserve) device.
2598 */
2599 static int
2600 dasd_eckd_release(struct dasd_device *device)
2601 {
2602 struct dasd_ccw_req *cqr;
2603 int rc;
2604 struct ccw1 *ccw;
2605
2606 if (!capable(CAP_SYS_ADMIN))
2607 return -EACCES;
2608
2609 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2610 if (IS_ERR(cqr)) {
2611 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2612 "Could not allocate initialization request");
2613 return PTR_ERR(cqr);
2614 }
2615 ccw = cqr->cpaddr;
2616 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2617 ccw->flags |= CCW_FLAG_SLI;
2618 ccw->count = 32;
2619 ccw->cda = (__u32)(addr_t) cqr->data;
2620 cqr->startdev = device;
2621 cqr->memdev = device;
2622 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2623 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2624 cqr->retries = 2; /* set retry counter to enable basic ERP */
2625 cqr->expires = 2 * HZ;
2626 cqr->buildclk = get_clock();
2627 cqr->status = DASD_CQR_FILLED;
2628
2629 rc = dasd_sleep_on_immediatly(cqr);
2630
2631 dasd_sfree_request(cqr, cqr->memdev);
2632 return rc;
2633 }
2634
2635 /*
2636 * Reserve device ioctl.
2637 * Options are set to 'synchronous wait for interrupt' and
2638 * 'timeout the request'. This leads to a terminate IO if
2639 * the interrupt is outstanding for a certain time.
2640 */
2641 static int
2642 dasd_eckd_reserve(struct dasd_device *device)
2643 {
2644 struct dasd_ccw_req *cqr;
2645 int rc;
2646 struct ccw1 *ccw;
2647
2648 if (!capable(CAP_SYS_ADMIN))
2649 return -EACCES;
2650
2651 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2652 if (IS_ERR(cqr)) {
2653 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2654 "Could not allocate initialization request");
2655 return PTR_ERR(cqr);
2656 }
2657 ccw = cqr->cpaddr;
2658 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2659 ccw->flags |= CCW_FLAG_SLI;
2660 ccw->count = 32;
2661 ccw->cda = (__u32)(addr_t) cqr->data;
2662 cqr->startdev = device;
2663 cqr->memdev = device;
2664 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2665 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2666 cqr->retries = 2; /* set retry counter to enable basic ERP */
2667 cqr->expires = 2 * HZ;
2668 cqr->buildclk = get_clock();
2669 cqr->status = DASD_CQR_FILLED;
2670
2671 rc = dasd_sleep_on_immediatly(cqr);
2672
2673 dasd_sfree_request(cqr, cqr->memdev);
2674 return rc;
2675 }
2676
2677 /*
2678 * Steal lock ioctl - unconditional reserve device.
2679 * Buils a channel programm to break a device's reservation.
2680 * (unconditional reserve)
2681 */
2682 static int
2683 dasd_eckd_steal_lock(struct dasd_device *device)
2684 {
2685 struct dasd_ccw_req *cqr;
2686 int rc;
2687 struct ccw1 *ccw;
2688
2689 if (!capable(CAP_SYS_ADMIN))
2690 return -EACCES;
2691
2692 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2693 if (IS_ERR(cqr)) {
2694 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2695 "Could not allocate initialization request");
2696 return PTR_ERR(cqr);
2697 }
2698 ccw = cqr->cpaddr;
2699 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2700 ccw->flags |= CCW_FLAG_SLI;
2701 ccw->count = 32;
2702 ccw->cda = (__u32)(addr_t) cqr->data;
2703 cqr->startdev = device;
2704 cqr->memdev = device;
2705 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2706 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2707 cqr->retries = 2; /* set retry counter to enable basic ERP */
2708 cqr->expires = 2 * HZ;
2709 cqr->buildclk = get_clock();
2710 cqr->status = DASD_CQR_FILLED;
2711
2712 rc = dasd_sleep_on_immediatly(cqr);
2713
2714 dasd_sfree_request(cqr, cqr->memdev);
2715 return rc;
2716 }
2717
2718 /*
2719 * Read performance statistics
2720 */
2721 static int
2722 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
2723 {
2724 struct dasd_psf_prssd_data *prssdp;
2725 struct dasd_rssd_perf_stats_t *stats;
2726 struct dasd_ccw_req *cqr;
2727 struct ccw1 *ccw;
2728 int rc;
2729
2730 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
2731 (sizeof(struct dasd_psf_prssd_data) +
2732 sizeof(struct dasd_rssd_perf_stats_t)),
2733 device);
2734 if (IS_ERR(cqr)) {
2735 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2736 "Could not allocate initialization request");
2737 return PTR_ERR(cqr);
2738 }
2739 cqr->startdev = device;
2740 cqr->memdev = device;
2741 cqr->retries = 0;
2742 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2743 cqr->expires = 10 * HZ;
2744
2745 /* Prepare for Read Subsystem Data */
2746 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2747 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
2748 prssdp->order = PSF_ORDER_PRSSD;
2749 prssdp->suborder = 0x01; /* Performance Statistics */
2750 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2751
2752 ccw = cqr->cpaddr;
2753 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2754 ccw->count = sizeof(struct dasd_psf_prssd_data);
2755 ccw->flags |= CCW_FLAG_CC;
2756 ccw->cda = (__u32)(addr_t) prssdp;
2757
2758 /* Read Subsystem Data - Performance Statistics */
2759 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2760 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
2761
2762 ccw++;
2763 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2764 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
2765 ccw->cda = (__u32)(addr_t) stats;
2766
2767 cqr->buildclk = get_clock();
2768 cqr->status = DASD_CQR_FILLED;
2769 rc = dasd_sleep_on(cqr);
2770 if (rc == 0) {
2771 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2772 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2773 if (copy_to_user(argp, stats,
2774 sizeof(struct dasd_rssd_perf_stats_t)))
2775 rc = -EFAULT;
2776 }
2777 dasd_sfree_request(cqr, cqr->memdev);
2778 return rc;
2779 }
2780
2781 /*
2782 * Get attributes (cache operations)
2783 * Returnes the cache attributes used in Define Extend (DE).
2784 */
2785 static int
2786 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
2787 {
2788 struct dasd_eckd_private *private =
2789 (struct dasd_eckd_private *)device->private;
2790 struct attrib_data_t attrib = private->attrib;
2791 int rc;
2792
2793 if (!capable(CAP_SYS_ADMIN))
2794 return -EACCES;
2795 if (!argp)
2796 return -EINVAL;
2797
2798 rc = 0;
2799 if (copy_to_user(argp, (long *) &attrib,
2800 sizeof(struct attrib_data_t)))
2801 rc = -EFAULT;
2802
2803 return rc;
2804 }
2805
2806 /*
2807 * Set attributes (cache operations)
2808 * Stores the attributes for cache operation to be used in Define Extend (DE).
2809 */
2810 static int
2811 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
2812 {
2813 struct dasd_eckd_private *private =
2814 (struct dasd_eckd_private *)device->private;
2815 struct attrib_data_t attrib;
2816
2817 if (!capable(CAP_SYS_ADMIN))
2818 return -EACCES;
2819 if (!argp)
2820 return -EINVAL;
2821
2822 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
2823 return -EFAULT;
2824 private->attrib = attrib;
2825
2826 dev_info(&device->cdev->dev,
2827 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2828 private->attrib.operation, private->attrib.nr_cyl);
2829 return 0;
2830 }
2831
2832 /*
2833 * Issue syscall I/O to EMC Symmetrix array.
2834 * CCWs are PSF and RSSD
2835 */
2836 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2837 {
2838 struct dasd_symmio_parms usrparm;
2839 char *psf_data, *rssd_result;
2840 struct dasd_ccw_req *cqr;
2841 struct ccw1 *ccw;
2842 int rc;
2843
2844 /* Copy parms from caller */
2845 rc = -EFAULT;
2846 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2847 goto out;
2848 if (is_compat_task() || sizeof(long) == 4) {
2849 /* Make sure pointers are sane even on 31 bit. */
2850 rc = -EINVAL;
2851 if ((usrparm.psf_data >> 32) != 0)
2852 goto out;
2853 if ((usrparm.rssd_result >> 32) != 0)
2854 goto out;
2855 usrparm.psf_data &= 0x7fffffffULL;
2856 usrparm.rssd_result &= 0x7fffffffULL;
2857 }
2858 /* alloc I/O data area */
2859 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2860 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2861 if (!psf_data || !rssd_result) {
2862 rc = -ENOMEM;
2863 goto out_free;
2864 }
2865
2866 /* get syscall header from user space */
2867 rc = -EFAULT;
2868 if (copy_from_user(psf_data,
2869 (void __user *)(unsigned long) usrparm.psf_data,
2870 usrparm.psf_data_len))
2871 goto out_free;
2872
2873 /* sanity check on syscall header */
2874 if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
2875 rc = -EINVAL;
2876 goto out_free;
2877 }
2878
2879 /* setup CCWs for PSF + RSSD */
2880 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
2881 if (IS_ERR(cqr)) {
2882 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2883 "Could not allocate initialization request");
2884 rc = PTR_ERR(cqr);
2885 goto out_free;
2886 }
2887
2888 cqr->startdev = device;
2889 cqr->memdev = device;
2890 cqr->retries = 3;
2891 cqr->expires = 10 * HZ;
2892 cqr->buildclk = get_clock();
2893 cqr->status = DASD_CQR_FILLED;
2894
2895 /* Build the ccws */
2896 ccw = cqr->cpaddr;
2897
2898 /* PSF ccw */
2899 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2900 ccw->count = usrparm.psf_data_len;
2901 ccw->flags |= CCW_FLAG_CC;
2902 ccw->cda = (__u32)(addr_t) psf_data;
2903
2904 ccw++;
2905
2906 /* RSSD ccw */
2907 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2908 ccw->count = usrparm.rssd_result_len;
2909 ccw->flags = CCW_FLAG_SLI ;
2910 ccw->cda = (__u32)(addr_t) rssd_result;
2911
2912 rc = dasd_sleep_on(cqr);
2913 if (rc)
2914 goto out_sfree;
2915
2916 rc = -EFAULT;
2917 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2918 rssd_result, usrparm.rssd_result_len))
2919 goto out_sfree;
2920 rc = 0;
2921
2922 out_sfree:
2923 dasd_sfree_request(cqr, cqr->memdev);
2924 out_free:
2925 kfree(rssd_result);
2926 kfree(psf_data);
2927 out:
2928 DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
2929 return rc;
2930 }
2931
2932 static int
2933 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
2934 {
2935 struct dasd_device *device = block->base;
2936
2937 switch (cmd) {
2938 case BIODASDGATTR:
2939 return dasd_eckd_get_attrib(device, argp);
2940 case BIODASDSATTR:
2941 return dasd_eckd_set_attrib(device, argp);
2942 case BIODASDPSRD:
2943 return dasd_eckd_performance(device, argp);
2944 case BIODASDRLSE:
2945 return dasd_eckd_release(device);
2946 case BIODASDRSRV:
2947 return dasd_eckd_reserve(device);
2948 case BIODASDSLCK:
2949 return dasd_eckd_steal_lock(device);
2950 case BIODASDSYMMIO:
2951 return dasd_symm_io(device, argp);
2952 default:
2953 return -ENOIOCTLCMD;
2954 }
2955 }
2956
2957 /*
2958 * Dump the range of CCWs into 'page' buffer
2959 * and return number of printed chars.
2960 */
2961 static int
2962 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
2963 {
2964 int len, count;
2965 char *datap;
2966
2967 len = 0;
2968 while (from <= to) {
2969 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2970 " CCW %p: %08X %08X DAT:",
2971 from, ((int *) from)[0], ((int *) from)[1]);
2972
2973 /* get pointer to data (consider IDALs) */
2974 if (from->flags & CCW_FLAG_IDA)
2975 datap = (char *) *((addr_t *) (addr_t) from->cda);
2976 else
2977 datap = (char *) ((addr_t) from->cda);
2978
2979 /* dump data (max 32 bytes) */
2980 for (count = 0; count < from->count && count < 32; count++) {
2981 if (count % 8 == 0) len += sprintf(page + len, " ");
2982 if (count % 4 == 0) len += sprintf(page + len, " ");
2983 len += sprintf(page + len, "%02x", datap[count]);
2984 }
2985 len += sprintf(page + len, "\n");
2986 from++;
2987 }
2988 return len;
2989 }
2990
2991 static void
2992 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
2993 char *reason)
2994 {
2995 u64 *sense;
2996
2997 sense = (u64 *) dasd_get_sense(irb);
2998 if (sense) {
2999 DBF_DEV_EVENT(DBF_EMERG, device,
3000 "%s: %s %02x%02x%02x %016llx %016llx %016llx "
3001 "%016llx", reason,
3002 scsw_is_tm(&irb->scsw) ? "t" : "c",
3003 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
3004 scsw_dstat(&irb->scsw), sense[0], sense[1],
3005 sense[2], sense[3]);
3006 } else {
3007 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
3008 "SORRY - NO VALID SENSE AVAILABLE\n");
3009 }
3010 }
3011
3012 /*
3013 * Print sense data and related channel program.
3014 * Parts are printed because printk buffer is only 1024 bytes.
3015 */
3016 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
3017 struct dasd_ccw_req *req, struct irb *irb)
3018 {
3019 char *page;
3020 struct ccw1 *first, *last, *fail, *from, *to;
3021 int len, sl, sct;
3022
3023 page = (char *) get_zeroed_page(GFP_ATOMIC);
3024 if (page == NULL) {
3025 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3026 "No memory to dump sense data\n");
3027 return;
3028 }
3029 /* dump the sense data */
3030 len = sprintf(page, KERN_ERR PRINTK_HEADER
3031 " I/O status report for device %s:\n",
3032 dev_name(&device->cdev->dev));
3033 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3034 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
3035 req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3036 scsw_cc(&irb->scsw), req->intrc);
3037 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3038 " device %s: Failing CCW: %p\n",
3039 dev_name(&device->cdev->dev),
3040 (void *) (addr_t) irb->scsw.cmd.cpa);
3041 if (irb->esw.esw0.erw.cons) {
3042 for (sl = 0; sl < 4; sl++) {
3043 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3044 " Sense(hex) %2d-%2d:",
3045 (8 * sl), ((8 * sl) + 7));
3046
3047 for (sct = 0; sct < 8; sct++) {
3048 len += sprintf(page + len, " %02x",
3049 irb->ecw[8 * sl + sct]);
3050 }
3051 len += sprintf(page + len, "\n");
3052 }
3053
3054 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3055 /* 24 Byte Sense Data */
3056 sprintf(page + len, KERN_ERR PRINTK_HEADER
3057 " 24 Byte: %x MSG %x, "
3058 "%s MSGb to SYSOP\n",
3059 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3060 irb->ecw[1] & 0x10 ? "" : "no");
3061 } else {
3062 /* 32 Byte Sense Data */
3063 sprintf(page + len, KERN_ERR PRINTK_HEADER
3064 " 32 Byte: Format: %x "
3065 "Exception class %x\n",
3066 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
3067 }
3068 } else {
3069 sprintf(page + len, KERN_ERR PRINTK_HEADER
3070 " SORRY - NO VALID SENSE AVAILABLE\n");
3071 }
3072 printk("%s", page);
3073
3074 if (req) {
3075 /* req == NULL for unsolicited interrupts */
3076 /* dump the Channel Program (max 140 Bytes per line) */
3077 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3078 first = req->cpaddr;
3079 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3080 to = min(first + 6, last);
3081 len = sprintf(page, KERN_ERR PRINTK_HEADER
3082 " Related CP in req: %p\n", req);
3083 dasd_eckd_dump_ccw_range(first, to, page + len);
3084 printk("%s", page);
3085
3086 /* print failing CCW area (maximum 4) */
3087 /* scsw->cda is either valid or zero */
3088 len = 0;
3089 from = ++to;
3090 fail = (struct ccw1 *)(addr_t)
3091 irb->scsw.cmd.cpa; /* failing CCW */
3092 if (from < fail - 2) {
3093 from = fail - 2; /* there is a gap - print header */
3094 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3095 }
3096 to = min(fail + 1, last);
3097 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3098
3099 /* print last CCWs (maximum 2) */
3100 from = max(from, ++to);
3101 if (from < last - 1) {
3102 from = last - 1; /* there is a gap - print header */
3103 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3104 }
3105 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3106 if (len > 0)
3107 printk("%s", page);
3108 }
3109 free_page((unsigned long) page);
3110 }
3111
3112
3113 /*
3114 * Print sense data from a tcw.
3115 */
3116 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3117 struct dasd_ccw_req *req, struct irb *irb)
3118 {
3119 char *page;
3120 int len, sl, sct, residual;
3121
3122 struct tsb *tsb;
3123 u8 *sense;
3124
3125
3126 page = (char *) get_zeroed_page(GFP_ATOMIC);
3127 if (page == NULL) {
3128 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
3129 "No memory to dump sense data");
3130 return;
3131 }
3132 /* dump the sense data */
3133 len = sprintf(page, KERN_ERR PRINTK_HEADER
3134 " I/O status report for device %s:\n",
3135 dev_name(&device->cdev->dev));
3136 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3137 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
3138 "fcxs: 0x%02X schxs: 0x%02X\n", req,
3139 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3140 scsw_cc(&irb->scsw), req->intrc,
3141 irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3142 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3143 " device %s: Failing TCW: %p\n",
3144 dev_name(&device->cdev->dev),
3145 (void *) (addr_t) irb->scsw.tm.tcw);
3146
3147 tsb = NULL;
3148 sense = NULL;
3149 if (irb->scsw.tm.tcw)
3150 tsb = tcw_get_tsb(
3151 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3152
3153 if (tsb && (irb->scsw.tm.fcxs == 0x01)) {
3154 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3155 " tsb->length %d\n", tsb->length);
3156 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3157 " tsb->flags %x\n", tsb->flags);
3158 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3159 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3160 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3161 " tsb->count %d\n", tsb->count);
3162 residual = tsb->count - 28;
3163 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3164 " residual %d\n", residual);
3165
3166 switch (tsb->flags & 0x07) {
3167 case 1: /* tsa_iostat */
3168 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3169 " tsb->tsa.iostat.dev_time %d\n",
3170 tsb->tsa.iostat.dev_time);
3171 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3172 " tsb->tsa.iostat.def_time %d\n",
3173 tsb->tsa.iostat.def_time);
3174 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3175 " tsb->tsa.iostat.queue_time %d\n",
3176 tsb->tsa.iostat.queue_time);
3177 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3178 " tsb->tsa.iostat.dev_busy_time %d\n",
3179 tsb->tsa.iostat.dev_busy_time);
3180 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3181 " tsb->tsa.iostat.dev_act_time %d\n",
3182 tsb->tsa.iostat.dev_act_time);
3183 sense = tsb->tsa.iostat.sense;
3184 break;
3185 case 2: /* ts_ddpc */
3186 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3187 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3188 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3189 " tsb->tsa.ddpc.rcq: ");
3190 for (sl = 0; sl < 16; sl++) {
3191 for (sct = 0; sct < 8; sct++) {
3192 len += sprintf(page + len, " %02x",
3193 tsb->tsa.ddpc.rcq[sl]);
3194 }
3195 len += sprintf(page + len, "\n");
3196 }
3197 sense = tsb->tsa.ddpc.sense;
3198 break;
3199 case 3: /* tsa_intrg */
3200 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3201 " tsb->tsa.intrg.: not supportet yet \n");
3202 break;
3203 }
3204
3205 if (sense) {
3206 for (sl = 0; sl < 4; sl++) {
3207 len += sprintf(page + len,
3208 KERN_ERR PRINTK_HEADER
3209 " Sense(hex) %2d-%2d:",
3210 (8 * sl), ((8 * sl) + 7));
3211 for (sct = 0; sct < 8; sct++) {
3212 len += sprintf(page + len, " %02x",
3213 sense[8 * sl + sct]);
3214 }
3215 len += sprintf(page + len, "\n");
3216 }
3217
3218 if (sense[27] & DASD_SENSE_BIT_0) {
3219 /* 24 Byte Sense Data */
3220 sprintf(page + len, KERN_ERR PRINTK_HEADER
3221 " 24 Byte: %x MSG %x, "
3222 "%s MSGb to SYSOP\n",
3223 sense[7] >> 4, sense[7] & 0x0f,
3224 sense[1] & 0x10 ? "" : "no");
3225 } else {
3226 /* 32 Byte Sense Data */
3227 sprintf(page + len, KERN_ERR PRINTK_HEADER
3228 " 32 Byte: Format: %x "
3229 "Exception class %x\n",
3230 sense[6] & 0x0f, sense[22] >> 4);
3231 }
3232 } else {
3233 sprintf(page + len, KERN_ERR PRINTK_HEADER
3234 " SORRY - NO VALID SENSE AVAILABLE\n");
3235 }
3236 } else {
3237 sprintf(page + len, KERN_ERR PRINTK_HEADER
3238 " SORRY - NO TSB DATA AVAILABLE\n");
3239 }
3240 printk("%s", page);
3241 free_page((unsigned long) page);
3242 }
3243
3244 static void dasd_eckd_dump_sense(struct dasd_device *device,
3245 struct dasd_ccw_req *req, struct irb *irb)
3246 {
3247 if (req && scsw_is_tm(&req->irb.scsw))
3248 dasd_eckd_dump_sense_tcw(device, req, irb);
3249 else
3250 dasd_eckd_dump_sense_ccw(device, req, irb);
3251 }
3252
3253 int dasd_eckd_pm_freeze(struct dasd_device *device)
3254 {
3255 /*
3256 * the device should be disconnected from our LCU structure
3257 * on restore we will reconnect it and reread LCU specific
3258 * information like PAV support that might have changed
3259 */
3260 dasd_alias_remove_device(device);
3261 dasd_alias_disconnect_device_from_lcu(device);
3262
3263 return 0;
3264 }
3265
3266 int dasd_eckd_restore_device(struct dasd_device *device)
3267 {
3268 struct dasd_eckd_private *private;
3269 struct dasd_eckd_characteristics temp_rdc_data;
3270 int is_known, rc;
3271 struct dasd_uid temp_uid;
3272 unsigned long flags;
3273
3274 private = (struct dasd_eckd_private *) device->private;
3275
3276 /* Read Configuration Data */
3277 rc = dasd_eckd_read_conf(device);
3278 if (rc)
3279 goto out_err;
3280
3281 /* Generate device unique id and register in devmap */
3282 rc = dasd_eckd_generate_uid(device, &private->uid);
3283 dasd_get_uid(device->cdev, &temp_uid);
3284 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
3285 dev_err(&device->cdev->dev, "The UID of the DASD has "
3286 "changed\n");
3287 if (rc)
3288 goto out_err;
3289 dasd_set_uid(device->cdev, &private->uid);
3290
3291 /* register lcu with alias handling, enable PAV if this is a new lcu */
3292 is_known = dasd_alias_make_device_known_to_lcu(device);
3293 if (is_known < 0)
3294 return is_known;
3295 if (!is_known) {
3296 dasd_eckd_validate_server(device);
3297 dasd_alias_lcu_setup_complete(device);
3298 } else
3299 dasd_alias_wait_for_lcu_setup(device);
3300
3301 /* RE-Read Configuration Data */
3302 rc = dasd_eckd_read_conf(device);
3303 if (rc)
3304 goto out_err;
3305
3306 /* Read Feature Codes */
3307 dasd_eckd_read_features(device);
3308
3309 /* Read Device Characteristics */
3310 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
3311 &temp_rdc_data, 64);
3312 if (rc) {
3313 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
3314 "Read device characteristic failed, rc=%d", rc);
3315 goto out_err;
3316 }
3317 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
3318 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
3319 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3320
3321 /* add device to alias management */
3322 dasd_alias_add_device(device);
3323
3324 return 0;
3325
3326 out_err:
3327 return -1;
3328 }
3329
3330 static struct ccw_driver dasd_eckd_driver = {
3331 .name = "dasd-eckd",
3332 .owner = THIS_MODULE,
3333 .ids = dasd_eckd_ids,
3334 .probe = dasd_eckd_probe,
3335 .remove = dasd_generic_remove,
3336 .set_offline = dasd_generic_set_offline,
3337 .set_online = dasd_eckd_set_online,
3338 .notify = dasd_generic_notify,
3339 .freeze = dasd_generic_pm_freeze,
3340 .thaw = dasd_generic_restore_device,
3341 .restore = dasd_generic_restore_device,
3342 };
3343
3344 /*
3345 * max_blocks is dependent on the amount of storage that is available
3346 * in the static io buffer for each device. Currently each device has
3347 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3348 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3349 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3350 * addition we have one define extent ccw + 16 bytes of data and one
3351 * locate record ccw + 16 bytes of data. That makes:
3352 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3353 * We want to fit two into the available memory so that we can immediately
3354 * start the next request if one finishes off. That makes 249.5 blocks
3355 * for one request. Give a little safety and the result is 240.
3356 */
3357 static struct dasd_discipline dasd_eckd_discipline = {
3358 .owner = THIS_MODULE,
3359 .name = "ECKD",
3360 .ebcname = "ECKD",
3361 .max_blocks = 240,
3362 .check_device = dasd_eckd_check_characteristics,
3363 .uncheck_device = dasd_eckd_uncheck_device,
3364 .do_analysis = dasd_eckd_do_analysis,
3365 .ready_to_online = dasd_eckd_ready_to_online,
3366 .online_to_ready = dasd_eckd_online_to_ready,
3367 .fill_geometry = dasd_eckd_fill_geometry,
3368 .start_IO = dasd_start_IO,
3369 .term_IO = dasd_term_IO,
3370 .handle_terminated_request = dasd_eckd_handle_terminated_request,
3371 .format_device = dasd_eckd_format_device,
3372 .erp_action = dasd_eckd_erp_action,
3373 .erp_postaction = dasd_eckd_erp_postaction,
3374 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3375 .build_cp = dasd_eckd_build_alias_cp,
3376 .free_cp = dasd_eckd_free_alias_cp,
3377 .dump_sense = dasd_eckd_dump_sense,
3378 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
3379 .fill_info = dasd_eckd_fill_info,
3380 .ioctl = dasd_eckd_ioctl,
3381 .freeze = dasd_eckd_pm_freeze,
3382 .restore = dasd_eckd_restore_device,
3383 };
3384
3385 static int __init
3386 dasd_eckd_init(void)
3387 {
3388 int ret;
3389
3390 ASCEBC(dasd_eckd_discipline.ebcname, 4);
3391 ret = ccw_driver_register(&dasd_eckd_driver);
3392 if (!ret)
3393 wait_for_device_probe();
3394
3395 return ret;
3396 }
3397
3398 static void __exit
3399 dasd_eckd_cleanup(void)
3400 {
3401 ccw_driver_unregister(&dasd_eckd_driver);
3402 }
3403
3404 module_init(dasd_eckd_init);
3405 module_exit(dasd_eckd_cleanup);
Linux kernel - Deliverables
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