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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / s390 / block / dasd_eckd.c
blob0cb2331168551ef4f290adb65683d8ee1902b30a
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 int readonly;
1093
1094 if (!ccw_device_is_pathgroup(device->cdev)) {
1095 dev_warn(&device->cdev->dev,
1096 "A channel path group could not be established\n");
1097 return -EIO;
1098 }
1099 if (!ccw_device_is_multipath(device->cdev)) {
1100 dev_info(&device->cdev->dev,
1101 "The DASD is not operating in multipath mode\n");
1102 }
1103 private = (struct dasd_eckd_private *) device->private;
1104 if (!private) {
1105 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1106 if (!private) {
1107 dev_warn(&device->cdev->dev,
1108 "Allocating memory for private DASD data "
1109 "failed\n");
1110 return -ENOMEM;
1111 }
1112 device->private = (void *) private;
1113 } else {
1114 memset(private, 0, sizeof(*private));
1115 }
1116 /* Invalidate status of initial analysis. */
1117 private->init_cqr_status = -1;
1118 /* Set default cache operations. */
1119 private->attrib.operation = DASD_NORMAL_CACHE;
1120 private->attrib.nr_cyl = 0;
1121
1122 /* Read Configuration Data */
1123 rc = dasd_eckd_read_conf(device);
1124 if (rc)
1125 goto out_err1;
1126
1127 /* Generate device unique id and register in devmap */
1128 rc = dasd_eckd_generate_uid(device, &private->uid);
1129 if (rc)
1130 goto out_err1;
1131 dasd_set_uid(device->cdev, &private->uid);
1132
1133 if (private->uid.type == UA_BASE_DEVICE) {
1134 block = dasd_alloc_block();
1135 if (IS_ERR(block)) {
1136 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1137 "could not allocate dasd "
1138 "block structure");
1139 rc = PTR_ERR(block);
1140 goto out_err1;
1141 }
1142 device->block = block;
1143 block->base = device;
1144 }
1145
1146 /* register lcu with alias handling, enable PAV if this is a new lcu */
1147 is_known = dasd_alias_make_device_known_to_lcu(device);
1148 if (is_known < 0) {
1149 rc = is_known;
1150 goto out_err2;
1151 }
1152 /*
1153 * dasd_eckd_vaildate_server is done on the first device that
1154 * is found for an LCU. All later other devices have to wait
1155 * for it, so they will read the correct feature codes.
1156 */
1157 if (!is_known) {
1158 dasd_eckd_validate_server(device);
1159 dasd_alias_lcu_setup_complete(device);
1160 } else
1161 dasd_alias_wait_for_lcu_setup(device);
1162
1163 /* device may report different configuration data after LCU setup */
1164 rc = dasd_eckd_read_conf(device);
1165 if (rc)
1166 goto out_err3;
1167
1168 /* Read Feature Codes */
1169 dasd_eckd_read_features(device);
1170
1171 /* Read Device Characteristics */
1172 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1173 &private->rdc_data, 64);
1174 if (rc) {
1175 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1176 "Read device characteristic failed, rc=%d", rc);
1177 goto out_err3;
1178 }
1179 /* find the vaild cylinder size */
1180 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1181 private->rdc_data.long_no_cyl)
1182 private->real_cyl = private->rdc_data.long_no_cyl;
1183 else
1184 private->real_cyl = private->rdc_data.no_cyl;
1185
1186 readonly = dasd_device_is_ro(device);
1187 if (readonly)
1188 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1189
1190 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1191 "with %d cylinders, %d heads, %d sectors%s\n",
1192 private->rdc_data.dev_type,
1193 private->rdc_data.dev_model,
1194 private->rdc_data.cu_type,
1195 private->rdc_data.cu_model.model,
1196 private->real_cyl,
1197 private->rdc_data.trk_per_cyl,
1198 private->rdc_data.sec_per_trk,
1199 readonly ? ", read-only device" : "");
1200 return 0;
1201
1202 out_err3:
1203 dasd_alias_disconnect_device_from_lcu(device);
1204 out_err2:
1205 dasd_free_block(device->block);
1206 device->block = NULL;
1207 out_err1:
1208 kfree(private->conf_data);
1209 kfree(device->private);
1210 device->private = NULL;
1211 return rc;
1212 }
1213
1214 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1215 {
1216 struct dasd_eckd_private *private;
1217
1218 private = (struct dasd_eckd_private *) device->private;
1219 dasd_alias_disconnect_device_from_lcu(device);
1220 private->ned = NULL;
1221 private->sneq = NULL;
1222 private->vdsneq = NULL;
1223 private->gneq = NULL;
1224 private->conf_len = 0;
1225 kfree(private->conf_data);
1226 private->conf_data = NULL;
1227 }
1228
1229 static struct dasd_ccw_req *
1230 dasd_eckd_analysis_ccw(struct dasd_device *device)
1231 {
1232 struct dasd_eckd_private *private;
1233 struct eckd_count *count_data;
1234 struct LO_eckd_data *LO_data;
1235 struct dasd_ccw_req *cqr;
1236 struct ccw1 *ccw;
1237 int cplength, datasize;
1238 int i;
1239
1240 private = (struct dasd_eckd_private *) device->private;
1241
1242 cplength = 8;
1243 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1244 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1245 if (IS_ERR(cqr))
1246 return cqr;
1247 ccw = cqr->cpaddr;
1248 /* Define extent for the first 3 tracks. */
1249 define_extent(ccw++, cqr->data, 0, 2,
1250 DASD_ECKD_CCW_READ_COUNT, device);
1251 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1252 /* Locate record for the first 4 records on track 0. */
1253 ccw[-1].flags |= CCW_FLAG_CC;
1254 locate_record(ccw++, LO_data++, 0, 0, 4,
1255 DASD_ECKD_CCW_READ_COUNT, device, 0);
1256
1257 count_data = private->count_area;
1258 for (i = 0; i < 4; i++) {
1259 ccw[-1].flags |= CCW_FLAG_CC;
1260 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1261 ccw->flags = 0;
1262 ccw->count = 8;
1263 ccw->cda = (__u32)(addr_t) count_data;
1264 ccw++;
1265 count_data++;
1266 }
1267
1268 /* Locate record for the first record on track 2. */
1269 ccw[-1].flags |= CCW_FLAG_CC;
1270 locate_record(ccw++, LO_data++, 2, 0, 1,
1271 DASD_ECKD_CCW_READ_COUNT, device, 0);
1272 /* Read count ccw. */
1273 ccw[-1].flags |= CCW_FLAG_CC;
1274 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1275 ccw->flags = 0;
1276 ccw->count = 8;
1277 ccw->cda = (__u32)(addr_t) count_data;
1278
1279 cqr->block = NULL;
1280 cqr->startdev = device;
1281 cqr->memdev = device;
1282 cqr->retries = 255;
1283 cqr->buildclk = get_clock();
1284 cqr->status = DASD_CQR_FILLED;
1285 return cqr;
1286 }
1287
1288 /* differentiate between 'no record found' and any other error */
1289 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1290 {
1291 char *sense;
1292 if (init_cqr->status == DASD_CQR_DONE)
1293 return INIT_CQR_OK;
1294 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1295 init_cqr->status == DASD_CQR_FAILED) {
1296 sense = dasd_get_sense(&init_cqr->irb);
1297 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1298 return INIT_CQR_UNFORMATTED;
1299 else
1300 return INIT_CQR_ERROR;
1301 } else
1302 return INIT_CQR_ERROR;
1303 }
1304
1305 /*
1306 * This is the callback function for the init_analysis cqr. It saves
1307 * the status of the initial analysis ccw before it frees it and kicks
1308 * the device to continue the startup sequence. This will call
1309 * dasd_eckd_do_analysis again (if the devices has not been marked
1310 * for deletion in the meantime).
1311 */
1312 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1313 void *data)
1314 {
1315 struct dasd_eckd_private *private;
1316 struct dasd_device *device;
1317
1318 device = init_cqr->startdev;
1319 private = (struct dasd_eckd_private *) device->private;
1320 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1321 dasd_sfree_request(init_cqr, device);
1322 dasd_kick_device(device);
1323 }
1324
1325 static int dasd_eckd_start_analysis(struct dasd_block *block)
1326 {
1327 struct dasd_eckd_private *private;
1328 struct dasd_ccw_req *init_cqr;
1329
1330 private = (struct dasd_eckd_private *) block->base->private;
1331 init_cqr = dasd_eckd_analysis_ccw(block->base);
1332 if (IS_ERR(init_cqr))
1333 return PTR_ERR(init_cqr);
1334 init_cqr->callback = dasd_eckd_analysis_callback;
1335 init_cqr->callback_data = NULL;
1336 init_cqr->expires = 5*HZ;
1337 /* first try without ERP, so we can later handle unformatted
1338 * devices as special case
1339 */
1340 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1341 init_cqr->retries = 0;
1342 dasd_add_request_head(init_cqr);
1343 return -EAGAIN;
1344 }
1345
1346 static int dasd_eckd_end_analysis(struct dasd_block *block)
1347 {
1348 struct dasd_device *device;
1349 struct dasd_eckd_private *private;
1350 struct eckd_count *count_area;
1351 unsigned int sb, blk_per_trk;
1352 int status, i;
1353 struct dasd_ccw_req *init_cqr;
1354
1355 device = block->base;
1356 private = (struct dasd_eckd_private *) device->private;
1357 status = private->init_cqr_status;
1358 private->init_cqr_status = -1;
1359 if (status == INIT_CQR_ERROR) {
1360 /* try again, this time with full ERP */
1361 init_cqr = dasd_eckd_analysis_ccw(device);
1362 dasd_sleep_on(init_cqr);
1363 status = dasd_eckd_analysis_evaluation(init_cqr);
1364 dasd_sfree_request(init_cqr, device);
1365 }
1366
1367 if (status == INIT_CQR_UNFORMATTED) {
1368 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1369 return -EMEDIUMTYPE;
1370 } else if (status == INIT_CQR_ERROR) {
1371 dev_err(&device->cdev->dev,
1372 "Detecting the DASD disk layout failed because "
1373 "of an I/O error\n");
1374 return -EIO;
1375 }
1376
1377 private->uses_cdl = 1;
1378 /* Check Track 0 for Compatible Disk Layout */
1379 count_area = NULL;
1380 for (i = 0; i < 3; i++) {
1381 if (private->count_area[i].kl != 4 ||
1382 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1383 private->uses_cdl = 0;
1384 break;
1385 }
1386 }
1387 if (i == 3)
1388 count_area = &private->count_area[4];
1389
1390 if (private->uses_cdl == 0) {
1391 for (i = 0; i < 5; i++) {
1392 if ((private->count_area[i].kl != 0) ||
1393 (private->count_area[i].dl !=
1394 private->count_area[0].dl))
1395 break;
1396 }
1397 if (i == 5)
1398 count_area = &private->count_area[0];
1399 } else {
1400 if (private->count_area[3].record == 1)
1401 dev_warn(&device->cdev->dev,
1402 "Track 0 has no records following the VTOC\n");
1403 }
1404 if (count_area != NULL && count_area->kl == 0) {
1405 /* we found notthing violating our disk layout */
1406 if (dasd_check_blocksize(count_area->dl) == 0)
1407 block->bp_block = count_area->dl;
1408 }
1409 if (block->bp_block == 0) {
1410 dev_warn(&device->cdev->dev,
1411 "The disk layout of the DASD is not supported\n");
1412 return -EMEDIUMTYPE;
1413 }
1414 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1415 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1416 block->s2b_shift++;
1417
1418 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
1419 block->blocks = (private->real_cyl *
1420 private->rdc_data.trk_per_cyl *
1421 blk_per_trk);
1422
1423 dev_info(&device->cdev->dev,
1424 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1425 "%s\n", (block->bp_block >> 10),
1426 ((private->real_cyl *
1427 private->rdc_data.trk_per_cyl *
1428 blk_per_trk * (block->bp_block >> 9)) >> 1),
1429 ((blk_per_trk * block->bp_block) >> 10),
1430 private->uses_cdl ?
1431 "compatible disk layout" : "linux disk layout");
1432
1433 return 0;
1434 }
1435
1436 static int dasd_eckd_do_analysis(struct dasd_block *block)
1437 {
1438 struct dasd_eckd_private *private;
1439
1440 private = (struct dasd_eckd_private *) block->base->private;
1441 if (private->init_cqr_status < 0)
1442 return dasd_eckd_start_analysis(block);
1443 else
1444 return dasd_eckd_end_analysis(block);
1445 }
1446
1447 static int dasd_eckd_ready_to_online(struct dasd_device *device)
1448 {
1449 return dasd_alias_add_device(device);
1450 };
1451
1452 static int dasd_eckd_online_to_ready(struct dasd_device *device)
1453 {
1454 return dasd_alias_remove_device(device);
1455 };
1456
1457 static int
1458 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1459 {
1460 struct dasd_eckd_private *private;
1461
1462 private = (struct dasd_eckd_private *) block->base->private;
1463 if (dasd_check_blocksize(block->bp_block) == 0) {
1464 geo->sectors = recs_per_track(&private->rdc_data,
1465 0, block->bp_block);
1466 }
1467 geo->cylinders = private->rdc_data.no_cyl;
1468 geo->heads = private->rdc_data.trk_per_cyl;
1469 return 0;
1470 }
1471
1472 static struct dasd_ccw_req *
1473 dasd_eckd_format_device(struct dasd_device * device,
1474 struct format_data_t * fdata)
1475 {
1476 struct dasd_eckd_private *private;
1477 struct dasd_ccw_req *fcp;
1478 struct eckd_count *ect;
1479 struct ccw1 *ccw;
1480 void *data;
1481 int rpt;
1482 struct ch_t address;
1483 int cplength, datasize;
1484 int i;
1485 int intensity = 0;
1486 int r0_perm;
1487
1488 private = (struct dasd_eckd_private *) device->private;
1489 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
1490 set_ch_t(&address,
1491 fdata->start_unit / private->rdc_data.trk_per_cyl,
1492 fdata->start_unit % private->rdc_data.trk_per_cyl);
1493
1494 /* Sanity checks. */
1495 if (fdata->start_unit >=
1496 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
1497 dev_warn(&device->cdev->dev, "Start track number %d used in "
1498 "formatting is too big\n", fdata->start_unit);
1499 return ERR_PTR(-EINVAL);
1500 }
1501 if (fdata->start_unit > fdata->stop_unit) {
1502 dev_warn(&device->cdev->dev, "Start track %d used in "
1503 "formatting exceeds end track\n", fdata->start_unit);
1504 return ERR_PTR(-EINVAL);
1505 }
1506 if (dasd_check_blocksize(fdata->blksize) != 0) {
1507 dev_warn(&device->cdev->dev,
1508 "The DASD cannot be formatted with block size %d\n",
1509 fdata->blksize);
1510 return ERR_PTR(-EINVAL);
1511 }
1512
1513 /*
1514 * fdata->intensity is a bit string that tells us what to do:
1515 * Bit 0: write record zero
1516 * Bit 1: write home address, currently not supported
1517 * Bit 2: invalidate tracks
1518 * Bit 3: use OS/390 compatible disk layout (cdl)
1519 * Bit 4: do not allow storage subsystem to modify record zero
1520 * Only some bit combinations do make sense.
1521 */
1522 if (fdata->intensity & 0x10) {
1523 r0_perm = 0;
1524 intensity = fdata->intensity & ~0x10;
1525 } else {
1526 r0_perm = 1;
1527 intensity = fdata->intensity;
1528 }
1529 switch (intensity) {
1530 case 0x00: /* Normal format */
1531 case 0x08: /* Normal format, use cdl. */
1532 cplength = 2 + rpt;
1533 datasize = sizeof(struct DE_eckd_data) +
1534 sizeof(struct LO_eckd_data) +
1535 rpt * sizeof(struct eckd_count);
1536 break;
1537 case 0x01: /* Write record zero and format track. */
1538 case 0x09: /* Write record zero and format track, use cdl. */
1539 cplength = 3 + rpt;
1540 datasize = sizeof(struct DE_eckd_data) +
1541 sizeof(struct LO_eckd_data) +
1542 sizeof(struct eckd_count) +
1543 rpt * sizeof(struct eckd_count);
1544 break;
1545 case 0x04: /* Invalidate track. */
1546 case 0x0c: /* Invalidate track, use cdl. */
1547 cplength = 3;
1548 datasize = sizeof(struct DE_eckd_data) +
1549 sizeof(struct LO_eckd_data) +
1550 sizeof(struct eckd_count);
1551 break;
1552 default:
1553 dev_warn(&device->cdev->dev, "An I/O control call used "
1554 "incorrect flags 0x%x\n", fdata->intensity);
1555 return ERR_PTR(-EINVAL);
1556 }
1557 /* Allocate the format ccw request. */
1558 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1559 if (IS_ERR(fcp))
1560 return fcp;
1561
1562 data = fcp->data;
1563 ccw = fcp->cpaddr;
1564
1565 switch (intensity & ~0x08) {
1566 case 0x00: /* Normal format. */
1567 define_extent(ccw++, (struct DE_eckd_data *) data,
1568 fdata->start_unit, fdata->start_unit,
1569 DASD_ECKD_CCW_WRITE_CKD, device);
1570 /* grant subsystem permission to format R0 */
1571 if (r0_perm)
1572 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1573 data += sizeof(struct DE_eckd_data);
1574 ccw[-1].flags |= CCW_FLAG_CC;
1575 locate_record(ccw++, (struct LO_eckd_data *) data,
1576 fdata->start_unit, 0, rpt,
1577 DASD_ECKD_CCW_WRITE_CKD, device,
1578 fdata->blksize);
1579 data += sizeof(struct LO_eckd_data);
1580 break;
1581 case 0x01: /* Write record zero + format track. */
1582 define_extent(ccw++, (struct DE_eckd_data *) data,
1583 fdata->start_unit, fdata->start_unit,
1584 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1585 device);
1586 data += sizeof(struct DE_eckd_data);
1587 ccw[-1].flags |= CCW_FLAG_CC;
1588 locate_record(ccw++, (struct LO_eckd_data *) data,
1589 fdata->start_unit, 0, rpt + 1,
1590 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
1591 device->block->bp_block);
1592 data += sizeof(struct LO_eckd_data);
1593 break;
1594 case 0x04: /* Invalidate track. */
1595 define_extent(ccw++, (struct DE_eckd_data *) data,
1596 fdata->start_unit, fdata->start_unit,
1597 DASD_ECKD_CCW_WRITE_CKD, device);
1598 data += sizeof(struct DE_eckd_data);
1599 ccw[-1].flags |= CCW_FLAG_CC;
1600 locate_record(ccw++, (struct LO_eckd_data *) data,
1601 fdata->start_unit, 0, 1,
1602 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1603 data += sizeof(struct LO_eckd_data);
1604 break;
1605 }
1606 if (intensity & 0x01) { /* write record zero */
1607 ect = (struct eckd_count *) data;
1608 data += sizeof(struct eckd_count);
1609 ect->cyl = address.cyl;
1610 ect->head = address.head;
1611 ect->record = 0;
1612 ect->kl = 0;
1613 ect->dl = 8;
1614 ccw[-1].flags |= CCW_FLAG_CC;
1615 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1616 ccw->flags = CCW_FLAG_SLI;
1617 ccw->count = 8;
1618 ccw->cda = (__u32)(addr_t) ect;
1619 ccw++;
1620 }
1621 if ((intensity & ~0x08) & 0x04) { /* erase track */
1622 ect = (struct eckd_count *) data;
1623 data += sizeof(struct eckd_count);
1624 ect->cyl = address.cyl;
1625 ect->head = address.head;
1626 ect->record = 1;
1627 ect->kl = 0;
1628 ect->dl = 0;
1629 ccw[-1].flags |= CCW_FLAG_CC;
1630 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1631 ccw->flags = CCW_FLAG_SLI;
1632 ccw->count = 8;
1633 ccw->cda = (__u32)(addr_t) ect;
1634 } else { /* write remaining records */
1635 for (i = 0; i < rpt; i++) {
1636 ect = (struct eckd_count *) data;
1637 data += sizeof(struct eckd_count);
1638 ect->cyl = address.cyl;
1639 ect->head = address.head;
1640 ect->record = i + 1;
1641 ect->kl = 0;
1642 ect->dl = fdata->blksize;
1643 /* Check for special tracks 0-1 when formatting CDL */
1644 if ((intensity & 0x08) &&
1645 fdata->start_unit == 0) {
1646 if (i < 3) {
1647 ect->kl = 4;
1648 ect->dl = sizes_trk0[i] - 4;
1649 }
1650 }
1651 if ((intensity & 0x08) &&
1652 fdata->start_unit == 1) {
1653 ect->kl = 44;
1654 ect->dl = LABEL_SIZE - 44;
1655 }
1656 ccw[-1].flags |= CCW_FLAG_CC;
1657 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1658 ccw->flags = CCW_FLAG_SLI;
1659 ccw->count = 8;
1660 ccw->cda = (__u32)(addr_t) ect;
1661 ccw++;
1662 }
1663 }
1664 fcp->startdev = device;
1665 fcp->memdev = device;
1666 fcp->retries = 256;
1667 fcp->buildclk = get_clock();
1668 fcp->status = DASD_CQR_FILLED;
1669 return fcp;
1670 }
1671
1672 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1673 {
1674 cqr->status = DASD_CQR_FILLED;
1675 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1676 dasd_eckd_reset_ccw_to_base_io(cqr);
1677 cqr->startdev = cqr->block->base;
1678 }
1679 };
1680
1681 static dasd_erp_fn_t
1682 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1683 {
1684 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1685 struct ccw_device *cdev = device->cdev;
1686
1687 switch (cdev->id.cu_type) {
1688 case 0x3990:
1689 case 0x2105:
1690 case 0x2107:
1691 case 0x1750:
1692 return dasd_3990_erp_action;
1693 case 0x9343:
1694 case 0x3880:
1695 default:
1696 return dasd_default_erp_action;
1697 }
1698 }
1699
1700 static dasd_erp_fn_t
1701 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1702 {
1703 return dasd_default_erp_postaction;
1704 }
1705
1706
1707 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1708 struct irb *irb)
1709 {
1710 char mask;
1711 char *sense = NULL;
1712
1713 /* first of all check for state change pending interrupt */
1714 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
1715 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
1716 dasd_generic_handle_state_change(device);
1717 return;
1718 }
1719
1720 /* summary unit check */
1721 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
1722 (irb->ecw[7] == 0x0D)) {
1723 dasd_alias_handle_summary_unit_check(device, irb);
1724 return;
1725 }
1726
1727 sense = dasd_get_sense(irb);
1728 /* service information message SIM */
1729 if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1730 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1731 dasd_3990_erp_handle_sim(device, sense);
1732 dasd_schedule_device_bh(device);
1733 return;
1734 }
1735
1736 if ((scsw_cc(&irb->scsw) == 1) &&
1737 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1738 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1739 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
1740 /* fake irb do nothing, they are handled elsewhere */
1741 dasd_schedule_device_bh(device);
1742 return;
1743 }
1744
1745 if (!sense) {
1746 /* just report other unsolicited interrupts */
1747 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1748 "unsolicited interrupt received");
1749 } else {
1750 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1751 "unsolicited interrupt received "
1752 "(sense available)");
1753 device->discipline->dump_sense_dbf(device, irb, "unsolicited");
1754 }
1755
1756 dasd_schedule_device_bh(device);
1757 return;
1758 };
1759
1760
1761 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1762 struct dasd_device *startdev,
1763 struct dasd_block *block,
1764 struct request *req,
1765 sector_t first_rec,
1766 sector_t last_rec,
1767 sector_t first_trk,
1768 sector_t last_trk,
1769 unsigned int first_offs,
1770 unsigned int last_offs,
1771 unsigned int blk_per_trk,
1772 unsigned int blksize)
1773 {
1774 struct dasd_eckd_private *private;
1775 unsigned long *idaws;
1776 struct LO_eckd_data *LO_data;
1777 struct dasd_ccw_req *cqr;
1778 struct ccw1 *ccw;
1779 struct req_iterator iter;
1780 struct bio_vec *bv;
1781 char *dst;
1782 unsigned int off;
1783 int count, cidaw, cplength, datasize;
1784 sector_t recid;
1785 unsigned char cmd, rcmd;
1786 int use_prefix;
1787 struct dasd_device *basedev;
1788
1789 basedev = block->base;
1790 private = (struct dasd_eckd_private *) basedev->private;
1791 if (rq_data_dir(req) == READ)
1792 cmd = DASD_ECKD_CCW_READ_MT;
1793 else if (rq_data_dir(req) == WRITE)
1794 cmd = DASD_ECKD_CCW_WRITE_MT;
1795 else
1796 return ERR_PTR(-EINVAL);
1797
1798 /* Check struct bio and count the number of blocks for the request. */
1799 count = 0;
1800 cidaw = 0;
1801 rq_for_each_segment(bv, req, iter) {
1802 if (bv->bv_len & (blksize - 1))
1803 /* Eckd can only do full blocks. */
1804 return ERR_PTR(-EINVAL);
1805 count += bv->bv_len >> (block->s2b_shift + 9);
1806 #if defined(CONFIG_64BIT)
1807 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
1808 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1809 #endif
1810 }
1811 /* Paranoia. */
1812 if (count != last_rec - first_rec + 1)
1813 return ERR_PTR(-EINVAL);
1814
1815 /* use the prefix command if available */
1816 use_prefix = private->features.feature[8] & 0x01;
1817 if (use_prefix) {
1818 /* 1x prefix + number of blocks */
1819 cplength = 2 + count;
1820 /* 1x prefix + cidaws*sizeof(long) */
1821 datasize = sizeof(struct PFX_eckd_data) +
1822 sizeof(struct LO_eckd_data) +
1823 cidaw * sizeof(unsigned long);
1824 } else {
1825 /* 1x define extent + 1x locate record + number of blocks */
1826 cplength = 2 + count;
1827 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1828 datasize = sizeof(struct DE_eckd_data) +
1829 sizeof(struct LO_eckd_data) +
1830 cidaw * sizeof(unsigned long);
1831 }
1832 /* Find out the number of additional locate record ccws for cdl. */
1833 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1834 if (last_rec >= 2*blk_per_trk)
1835 count = 2*blk_per_trk - first_rec;
1836 cplength += count;
1837 datasize += count*sizeof(struct LO_eckd_data);
1838 }
1839 /* Allocate the ccw request. */
1840 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1841 startdev);
1842 if (IS_ERR(cqr))
1843 return cqr;
1844 ccw = cqr->cpaddr;
1845 /* First ccw is define extent or prefix. */
1846 if (use_prefix) {
1847 if (prefix(ccw++, cqr->data, first_trk,
1848 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1849 /* Clock not in sync and XRC is enabled.
1850 * Try again later.
1851 */
1852 dasd_sfree_request(cqr, startdev);
1853 return ERR_PTR(-EAGAIN);
1854 }
1855 idaws = (unsigned long *) (cqr->data +
1856 sizeof(struct PFX_eckd_data));
1857 } else {
1858 if (define_extent(ccw++, cqr->data, first_trk,
1859 last_trk, cmd, startdev) == -EAGAIN) {
1860 /* Clock not in sync and XRC is enabled.
1861 * Try again later.
1862 */
1863 dasd_sfree_request(cqr, startdev);
1864 return ERR_PTR(-EAGAIN);
1865 }
1866 idaws = (unsigned long *) (cqr->data +
1867 sizeof(struct DE_eckd_data));
1868 }
1869 /* Build locate_record+read/write/ccws. */
1870 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1871 recid = first_rec;
1872 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1873 /* Only standard blocks so there is just one locate record. */
1874 ccw[-1].flags |= CCW_FLAG_CC;
1875 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1876 last_rec - recid + 1, cmd, basedev, blksize);
1877 }
1878 rq_for_each_segment(bv, req, iter) {
1879 dst = page_address(bv->bv_page) + bv->bv_offset;
1880 if (dasd_page_cache) {
1881 char *copy = kmem_cache_alloc(dasd_page_cache,
1882 GFP_DMA | __GFP_NOWARN);
1883 if (copy && rq_data_dir(req) == WRITE)
1884 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1885 if (copy)
1886 dst = copy + bv->bv_offset;
1887 }
1888 for (off = 0; off < bv->bv_len; off += blksize) {
1889 sector_t trkid = recid;
1890 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1891 rcmd = cmd;
1892 count = blksize;
1893 /* Locate record for cdl special block ? */
1894 if (private->uses_cdl && recid < 2*blk_per_trk) {
1895 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1896 rcmd |= 0x8;
1897 count = dasd_eckd_cdl_reclen(recid);
1898 if (count < blksize &&
1899 rq_data_dir(req) == READ)
1900 memset(dst + count, 0xe5,
1901 blksize - count);
1902 }
1903 ccw[-1].flags |= CCW_FLAG_CC;
1904 locate_record(ccw++, LO_data++,
1905 trkid, recoffs + 1,
1906 1, rcmd, basedev, count);
1907 }
1908 /* Locate record for standard blocks ? */
1909 if (private->uses_cdl && recid == 2*blk_per_trk) {
1910 ccw[-1].flags |= CCW_FLAG_CC;
1911 locate_record(ccw++, LO_data++,
1912 trkid, recoffs + 1,
1913 last_rec - recid + 1,
1914 cmd, basedev, count);
1915 }
1916 /* Read/write ccw. */
1917 ccw[-1].flags |= CCW_FLAG_CC;
1918 ccw->cmd_code = rcmd;
1919 ccw->count = count;
1920 if (idal_is_needed(dst, blksize)) {
1921 ccw->cda = (__u32)(addr_t) idaws;
1922 ccw->flags = CCW_FLAG_IDA;
1923 idaws = idal_create_words(idaws, dst, blksize);
1924 } else {
1925 ccw->cda = (__u32)(addr_t) dst;
1926 ccw->flags = 0;
1927 }
1928 ccw++;
1929 dst += blksize;
1930 recid++;
1931 }
1932 }
1933 if (blk_noretry_request(req) ||
1934 block->base->features & DASD_FEATURE_FAILFAST)
1935 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1936 cqr->startdev = startdev;
1937 cqr->memdev = startdev;
1938 cqr->block = block;
1939 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1940 cqr->lpm = private->path_data.ppm;
1941 cqr->retries = 256;
1942 cqr->buildclk = get_clock();
1943 cqr->status = DASD_CQR_FILLED;
1944 return cqr;
1945 }
1946
1947 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1948 struct dasd_device *startdev,
1949 struct dasd_block *block,
1950 struct request *req,
1951 sector_t first_rec,
1952 sector_t last_rec,
1953 sector_t first_trk,
1954 sector_t last_trk,
1955 unsigned int first_offs,
1956 unsigned int last_offs,
1957 unsigned int blk_per_trk,
1958 unsigned int blksize)
1959 {
1960 struct dasd_eckd_private *private;
1961 unsigned long *idaws;
1962 struct dasd_ccw_req *cqr;
1963 struct ccw1 *ccw;
1964 struct req_iterator iter;
1965 struct bio_vec *bv;
1966 char *dst, *idaw_dst;
1967 unsigned int cidaw, cplength, datasize;
1968 unsigned int tlf;
1969 sector_t recid;
1970 unsigned char cmd;
1971 struct dasd_device *basedev;
1972 unsigned int trkcount, count, count_to_trk_end;
1973 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
1974 unsigned char new_track, end_idaw;
1975 sector_t trkid;
1976 unsigned int recoffs;
1977
1978 basedev = block->base;
1979 private = (struct dasd_eckd_private *) basedev->private;
1980 if (rq_data_dir(req) == READ)
1981 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
1982 else if (rq_data_dir(req) == WRITE)
1983 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
1984 else
1985 return ERR_PTR(-EINVAL);
1986
1987 /* Track based I/O needs IDAWs for each page, and not just for
1988 * 64 bit addresses. We need additional idals for pages
1989 * that get filled from two tracks, so we use the number
1990 * of records as upper limit.
1991 */
1992 cidaw = last_rec - first_rec + 1;
1993 trkcount = last_trk - first_trk + 1;
1994
1995 /* 1x prefix + one read/write ccw per track */
1996 cplength = 1 + trkcount;
1997
1998 /* on 31-bit we need space for two 32 bit addresses per page
1999 * on 64-bit one 64 bit address
2000 */
2001 datasize = sizeof(struct PFX_eckd_data) +
2002 cidaw * sizeof(unsigned long long);
2003
2004 /* Allocate the ccw request. */
2005 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2006 startdev);
2007 if (IS_ERR(cqr))
2008 return cqr;
2009 ccw = cqr->cpaddr;
2010 /* transfer length factor: how many bytes to read from the last track */
2011 if (first_trk == last_trk)
2012 tlf = last_offs - first_offs + 1;
2013 else
2014 tlf = last_offs + 1;
2015 tlf *= blksize;
2016
2017 if (prefix_LRE(ccw++, cqr->data, first_trk,
2018 last_trk, cmd, basedev, startdev,
2019 1 /* format */, first_offs + 1,
2020 trkcount, blksize,
2021 tlf) == -EAGAIN) {
2022 /* Clock not in sync and XRC is enabled.
2023 * Try again later.
2024 */
2025 dasd_sfree_request(cqr, startdev);
2026 return ERR_PTR(-EAGAIN);
2027 }
2028
2029 /*
2030 * The translation of request into ccw programs must meet the
2031 * following conditions:
2032 * - all idaws but the first and the last must address full pages
2033 * (or 2K blocks on 31-bit)
2034 * - the scope of a ccw and it's idal ends with the track boundaries
2035 */
2036 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2037 recid = first_rec;
2038 new_track = 1;
2039 end_idaw = 0;
2040 len_to_track_end = 0;
2041 idaw_dst = 0;
2042 idaw_len = 0;
2043 rq_for_each_segment(bv, req, iter) {
2044 dst = page_address(bv->bv_page) + bv->bv_offset;
2045 seg_len = bv->bv_len;
2046 while (seg_len) {
2047 if (new_track) {
2048 trkid = recid;
2049 recoffs = sector_div(trkid, blk_per_trk);
2050 count_to_trk_end = blk_per_trk - recoffs;
2051 count = min((last_rec - recid + 1),
2052 (sector_t)count_to_trk_end);
2053 len_to_track_end = count * blksize;
2054 ccw[-1].flags |= CCW_FLAG_CC;
2055 ccw->cmd_code = cmd;
2056 ccw->count = len_to_track_end;
2057 ccw->cda = (__u32)(addr_t)idaws;
2058 ccw->flags = CCW_FLAG_IDA;
2059 ccw++;
2060 recid += count;
2061 new_track = 0;
2062 /* first idaw for a ccw may start anywhere */
2063 if (!idaw_dst)
2064 idaw_dst = dst;
2065 }
2066 /* If we start a new idaw, we must make sure that it
2067 * starts on an IDA_BLOCK_SIZE boundary.
2068 * If we continue an idaw, we must make sure that the
2069 * current segment begins where the so far accumulated
2070 * idaw ends
2071 */
2072 if (!idaw_dst) {
2073 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2074 dasd_sfree_request(cqr, startdev);
2075 return ERR_PTR(-ERANGE);
2076 } else
2077 idaw_dst = dst;
2078 }
2079 if ((idaw_dst + idaw_len) != dst) {
2080 dasd_sfree_request(cqr, startdev);
2081 return ERR_PTR(-ERANGE);
2082 }
2083 part_len = min(seg_len, len_to_track_end);
2084 seg_len -= part_len;
2085 dst += part_len;
2086 idaw_len += part_len;
2087 len_to_track_end -= part_len;
2088 /* collected memory area ends on an IDA_BLOCK border,
2089 * -> create an idaw
2090 * idal_create_words will handle cases where idaw_len
2091 * is larger then IDA_BLOCK_SIZE
2092 */
2093 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2094 end_idaw = 1;
2095 /* We also need to end the idaw at track end */
2096 if (!len_to_track_end) {
2097 new_track = 1;
2098 end_idaw = 1;
2099 }
2100 if (end_idaw) {
2101 idaws = idal_create_words(idaws, idaw_dst,
2102 idaw_len);
2103 idaw_dst = 0;
2104 idaw_len = 0;
2105 end_idaw = 0;
2106 }
2107 }
2108 }
2109
2110 if (blk_noretry_request(req) ||
2111 block->base->features & DASD_FEATURE_FAILFAST)
2112 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2113 cqr->startdev = startdev;
2114 cqr->memdev = startdev;
2115 cqr->block = block;
2116 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2117 cqr->lpm = private->path_data.ppm;
2118 cqr->retries = 256;
2119 cqr->buildclk = get_clock();
2120 cqr->status = DASD_CQR_FILLED;
2121 return cqr;
2122 }
2123
2124 static int prepare_itcw(struct itcw *itcw,
2125 unsigned int trk, unsigned int totrk, int cmd,
2126 struct dasd_device *basedev,
2127 struct dasd_device *startdev,
2128 unsigned int rec_on_trk, int count,
2129 unsigned int blksize,
2130 unsigned int total_data_size,
2131 unsigned int tlf,
2132 unsigned int blk_per_trk)
2133 {
2134 struct PFX_eckd_data pfxdata;
2135 struct dasd_eckd_private *basepriv, *startpriv;
2136 struct DE_eckd_data *dedata;
2137 struct LRE_eckd_data *lredata;
2138 struct dcw *dcw;
2139
2140 u32 begcyl, endcyl;
2141 u16 heads, beghead, endhead;
2142 u8 pfx_cmd;
2143
2144 int rc = 0;
2145 int sector = 0;
2146 int dn, d;
2147
2148
2149 /* setup prefix data */
2150 basepriv = (struct dasd_eckd_private *) basedev->private;
2151 startpriv = (struct dasd_eckd_private *) startdev->private;
2152 dedata = &pfxdata.define_extent;
2153 lredata = &pfxdata.locate_record;
2154
2155 memset(&pfxdata, 0, sizeof(pfxdata));
2156 pfxdata.format = 1; /* PFX with LRE */
2157 pfxdata.base_address = basepriv->ned->unit_addr;
2158 pfxdata.base_lss = basepriv->ned->ID;
2159 pfxdata.validity.define_extent = 1;
2160
2161 /* private uid is kept up to date, conf_data may be outdated */
2162 if (startpriv->uid.type != UA_BASE_DEVICE) {
2163 pfxdata.validity.verify_base = 1;
2164 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2165 pfxdata.validity.hyper_pav = 1;
2166 }
2167
2168 switch (cmd) {
2169 case DASD_ECKD_CCW_READ_TRACK_DATA:
2170 dedata->mask.perm = 0x1;
2171 dedata->attributes.operation = basepriv->attrib.operation;
2172 dedata->blk_size = blksize;
2173 dedata->ga_extended |= 0x42;
2174 lredata->operation.orientation = 0x0;
2175 lredata->operation.operation = 0x0C;
2176 lredata->auxiliary.check_bytes = 0x01;
2177 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2178 break;
2179 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2180 dedata->mask.perm = 0x02;
2181 dedata->attributes.operation = basepriv->attrib.operation;
2182 dedata->blk_size = blksize;
2183 rc = check_XRC_on_prefix(&pfxdata, basedev);
2184 dedata->ga_extended |= 0x42;
2185 lredata->operation.orientation = 0x0;
2186 lredata->operation.operation = 0x3F;
2187 lredata->extended_operation = 0x23;
2188 lredata->auxiliary.check_bytes = 0x2;
2189 pfx_cmd = DASD_ECKD_CCW_PFX;
2190 break;
2191 default:
2192 DBF_DEV_EVENT(DBF_ERR, basedev,
2193 "prepare itcw, unknown opcode 0x%x", cmd);
2194 BUG();
2195 break;
2196 }
2197 if (rc)
2198 return rc;
2199
2200 dedata->attributes.mode = 0x3; /* ECKD */
2201
2202 heads = basepriv->rdc_data.trk_per_cyl;
2203 begcyl = trk / heads;
2204 beghead = trk % heads;
2205 endcyl = totrk / heads;
2206 endhead = totrk % heads;
2207
2208 /* check for sequential prestage - enhance cylinder range */
2209 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2210 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2211
2212 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2213 endcyl += basepriv->attrib.nr_cyl;
2214 else
2215 endcyl = (basepriv->real_cyl - 1);
2216 }
2217
2218 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2219 set_ch_t(&dedata->end_ext, endcyl, endhead);
2220
2221 dedata->ep_format = 0x20; /* records per track is valid */
2222 dedata->ep_rec_per_track = blk_per_trk;
2223
2224 if (rec_on_trk) {
2225 switch (basepriv->rdc_data.dev_type) {
2226 case 0x3390:
2227 dn = ceil_quot(blksize + 6, 232);
2228 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2229 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2230 break;
2231 case 0x3380:
2232 d = 7 + ceil_quot(blksize + 12, 32);
2233 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2234 break;
2235 }
2236 }
2237
2238 lredata->auxiliary.length_valid = 1;
2239 lredata->auxiliary.length_scope = 1;
2240 lredata->auxiliary.imbedded_ccw_valid = 1;
2241 lredata->length = tlf;
2242 lredata->imbedded_ccw = cmd;
2243 lredata->count = count;
2244 lredata->sector = sector;
2245 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2246 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2247 lredata->search_arg.head = lredata->seek_addr.head;
2248 lredata->search_arg.record = rec_on_trk;
2249
2250 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2251 &pfxdata, sizeof(pfxdata), total_data_size);
2252
2253 return rc;
2254 }
2255
2256 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2257 struct dasd_device *startdev,
2258 struct dasd_block *block,
2259 struct request *req,
2260 sector_t first_rec,
2261 sector_t last_rec,
2262 sector_t first_trk,
2263 sector_t last_trk,
2264 unsigned int first_offs,
2265 unsigned int last_offs,
2266 unsigned int blk_per_trk,
2267 unsigned int blksize)
2268 {
2269 struct dasd_eckd_private *private;
2270 struct dasd_ccw_req *cqr;
2271 struct req_iterator iter;
2272 struct bio_vec *bv;
2273 char *dst;
2274 unsigned int trkcount, ctidaw;
2275 unsigned char cmd;
2276 struct dasd_device *basedev;
2277 unsigned int tlf;
2278 struct itcw *itcw;
2279 struct tidaw *last_tidaw = NULL;
2280 int itcw_op;
2281 size_t itcw_size;
2282
2283 basedev = block->base;
2284 private = (struct dasd_eckd_private *) basedev->private;
2285 if (rq_data_dir(req) == READ) {
2286 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2287 itcw_op = ITCW_OP_READ;
2288 } else if (rq_data_dir(req) == WRITE) {
2289 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2290 itcw_op = ITCW_OP_WRITE;
2291 } else
2292 return ERR_PTR(-EINVAL);
2293
2294 /* trackbased I/O needs address all memory via TIDAWs,
2295 * not just for 64 bit addresses. This allows us to map
2296 * each segment directly to one tidaw.
2297 */
2298 trkcount = last_trk - first_trk + 1;
2299 ctidaw = 0;
2300 rq_for_each_segment(bv, req, iter) {
2301 ++ctidaw;
2302 }
2303
2304 /* Allocate the ccw request. */
2305 itcw_size = itcw_calc_size(0, ctidaw, 0);
2306 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2307 if (IS_ERR(cqr))
2308 return cqr;
2309
2310 cqr->cpmode = 1;
2311 cqr->startdev = startdev;
2312 cqr->memdev = startdev;
2313 cqr->block = block;
2314 cqr->expires = 100*HZ;
2315 cqr->buildclk = get_clock();
2316 cqr->status = DASD_CQR_FILLED;
2317 cqr->retries = 10;
2318
2319 /* transfer length factor: how many bytes to read from the last track */
2320 if (first_trk == last_trk)
2321 tlf = last_offs - first_offs + 1;
2322 else
2323 tlf = last_offs + 1;
2324 tlf *= blksize;
2325
2326 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2327 cqr->cpaddr = itcw_get_tcw(itcw);
2328
2329 if (prepare_itcw(itcw, first_trk, last_trk,
2330 cmd, basedev, startdev,
2331 first_offs + 1,
2332 trkcount, blksize,
2333 (last_rec - first_rec + 1) * blksize,
2334 tlf, blk_per_trk) == -EAGAIN) {
2335 /* Clock not in sync and XRC is enabled.
2336 * Try again later.
2337 */
2338 dasd_sfree_request(cqr, startdev);
2339 return ERR_PTR(-EAGAIN);
2340 }
2341
2342 /*
2343 * A tidaw can address 4k of memory, but must not cross page boundaries
2344 * We can let the block layer handle this by setting
2345 * blk_queue_segment_boundary to page boundaries and
2346 * blk_max_segment_size to page size when setting up the request queue.
2347 */
2348 rq_for_each_segment(bv, req, iter) {
2349 dst = page_address(bv->bv_page) + bv->bv_offset;
2350 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2351 if (IS_ERR(last_tidaw))
2352 return (struct dasd_ccw_req *)last_tidaw;
2353 }
2354
2355 last_tidaw->flags |= 0x80;
2356 itcw_finalize(itcw);
2357
2358 if (blk_noretry_request(req) ||
2359 block->base->features & DASD_FEATURE_FAILFAST)
2360 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2361 cqr->startdev = startdev;
2362 cqr->memdev = startdev;
2363 cqr->block = block;
2364 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2365 cqr->lpm = private->path_data.ppm;
2366 cqr->retries = 256;
2367 cqr->buildclk = get_clock();
2368 cqr->status = DASD_CQR_FILLED;
2369 return cqr;
2370 }
2371
2372 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2373 struct dasd_block *block,
2374 struct request *req)
2375 {
2376 int tpm, cmdrtd, cmdwtd;
2377 int use_prefix;
2378 #if defined(CONFIG_64BIT)
2379 int fcx_in_css, fcx_in_gneq, fcx_in_features;
2380 #endif
2381 struct dasd_eckd_private *private;
2382 struct dasd_device *basedev;
2383 sector_t first_rec, last_rec;
2384 sector_t first_trk, last_trk;
2385 unsigned int first_offs, last_offs;
2386 unsigned int blk_per_trk, blksize;
2387 int cdlspecial;
2388 struct dasd_ccw_req *cqr;
2389
2390 basedev = block->base;
2391 private = (struct dasd_eckd_private *) basedev->private;
2392
2393 /* Calculate number of blocks/records per track. */
2394 blksize = block->bp_block;
2395 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2396 if (blk_per_trk == 0)
2397 return ERR_PTR(-EINVAL);
2398 /* Calculate record id of first and last block. */
2399 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
2400 first_offs = sector_div(first_trk, blk_per_trk);
2401 last_rec = last_trk =
2402 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
2403 last_offs = sector_div(last_trk, blk_per_trk);
2404 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2405
2406 /* is transport mode supported? */
2407 #if defined(CONFIG_64BIT)
2408 fcx_in_css = css_general_characteristics.fcx;
2409 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2410 fcx_in_features = private->features.feature[40] & 0x80;
2411 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
2412 #else
2413 tpm = 0;
2414 #endif
2415
2416 /* is read track data and write track data in command mode supported? */
2417 cmdrtd = private->features.feature[9] & 0x20;
2418 cmdwtd = private->features.feature[12] & 0x40;
2419 use_prefix = private->features.feature[8] & 0x01;
2420
2421 cqr = NULL;
2422 if (cdlspecial || dasd_page_cache) {
2423 /* do nothing, just fall through to the cmd mode single case */
2424 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2425 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2426 first_rec, last_rec,
2427 first_trk, last_trk,
2428 first_offs, last_offs,
2429 blk_per_trk, blksize);
2430 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2431 cqr = NULL;
2432 } else if (use_prefix &&
2433 (((rq_data_dir(req) == READ) && cmdrtd) ||
2434 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2435 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2436 first_rec, last_rec,
2437 first_trk, last_trk,
2438 first_offs, last_offs,
2439 blk_per_trk, blksize);
2440 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2441 cqr = NULL;
2442 }
2443 if (!cqr)
2444 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2445 first_rec, last_rec,
2446 first_trk, last_trk,
2447 first_offs, last_offs,
2448 blk_per_trk, blksize);
2449 return cqr;
2450 }
2451
2452 static int
2453 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2454 {
2455 struct dasd_eckd_private *private;
2456 struct ccw1 *ccw;
2457 struct req_iterator iter;
2458 struct bio_vec *bv;
2459 char *dst, *cda;
2460 unsigned int blksize, blk_per_trk, off;
2461 sector_t recid;
2462 int status;
2463
2464 if (!dasd_page_cache)
2465 goto out;
2466 private = (struct dasd_eckd_private *) cqr->block->base->private;
2467 blksize = cqr->block->bp_block;
2468 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2469 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
2470 ccw = cqr->cpaddr;
2471 /* Skip over define extent & locate record. */
2472 ccw++;
2473 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2474 ccw++;
2475 rq_for_each_segment(bv, req, iter) {
2476 dst = page_address(bv->bv_page) + bv->bv_offset;
2477 for (off = 0; off < bv->bv_len; off += blksize) {
2478 /* Skip locate record. */
2479 if (private->uses_cdl && recid <= 2*blk_per_trk)
2480 ccw++;
2481 if (dst) {
2482 if (ccw->flags & CCW_FLAG_IDA)
2483 cda = *((char **)((addr_t) ccw->cda));
2484 else
2485 cda = (char *)((addr_t) ccw->cda);
2486 if (dst != cda) {
2487 if (rq_data_dir(req) == READ)
2488 memcpy(dst, cda, bv->bv_len);
2489 kmem_cache_free(dasd_page_cache,
2490 (void *)((addr_t)cda & PAGE_MASK));
2491 }
2492 dst = NULL;
2493 }
2494 ccw++;
2495 recid++;
2496 }
2497 }
2498 out:
2499 status = cqr->status == DASD_CQR_DONE;
2500 dasd_sfree_request(cqr, cqr->memdev);
2501 return status;
2502 }
2503
2504 /*
2505 * Modify ccw/tcw in cqr so it can be started on a base device.
2506 *
2507 * Note that this is not enough to restart the cqr!
2508 * Either reset cqr->startdev as well (summary unit check handling)
2509 * or restart via separate cqr (as in ERP handling).
2510 */
2511 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2512 {
2513 struct ccw1 *ccw;
2514 struct PFX_eckd_data *pfxdata;
2515 struct tcw *tcw;
2516 struct tccb *tccb;
2517 struct dcw *dcw;
2518
2519 if (cqr->cpmode == 1) {
2520 tcw = cqr->cpaddr;
2521 tccb = tcw_get_tccb(tcw);
2522 dcw = (struct dcw *)&tccb->tca[0];
2523 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
2524 pfxdata->validity.verify_base = 0;
2525 pfxdata->validity.hyper_pav = 0;
2526 } else {
2527 ccw = cqr->cpaddr;
2528 pfxdata = cqr->data;
2529 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2530 pfxdata->validity.verify_base = 0;
2531 pfxdata->validity.hyper_pav = 0;
2532 }
2533 }
2534 }
2535
2536 #define DASD_ECKD_CHANQ_MAX_SIZE 4
2537
2538 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2539 struct dasd_block *block,
2540 struct request *req)
2541 {
2542 struct dasd_eckd_private *private;
2543 struct dasd_device *startdev;
2544 unsigned long flags;
2545 struct dasd_ccw_req *cqr;
2546
2547 startdev = dasd_alias_get_start_dev(base);
2548 if (!startdev)
2549 startdev = base;
2550 private = (struct dasd_eckd_private *) startdev->private;
2551 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2552 return ERR_PTR(-EBUSY);
2553
2554 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2555 private->count++;
2556 cqr = dasd_eckd_build_cp(startdev, block, req);
2557 if (IS_ERR(cqr))
2558 private->count--;
2559 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2560 return cqr;
2561 }
2562
2563 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2564 struct request *req)
2565 {
2566 struct dasd_eckd_private *private;
2567 unsigned long flags;
2568
2569 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2570 private = (struct dasd_eckd_private *) cqr->memdev->private;
2571 private->count--;
2572 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2573 return dasd_eckd_free_cp(cqr, req);
2574 }
2575
2576 static int
2577 dasd_eckd_fill_info(struct dasd_device * device,
2578 struct dasd_information2_t * info)
2579 {
2580 struct dasd_eckd_private *private;
2581
2582 private = (struct dasd_eckd_private *) device->private;
2583 info->label_block = 2;
2584 info->FBA_layout = private->uses_cdl ? 0 : 1;
2585 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2586 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2587 memcpy(info->characteristics, &private->rdc_data,
2588 sizeof(struct dasd_eckd_characteristics));
2589 info->confdata_size = min((unsigned long)private->conf_len,
2590 sizeof(info->configuration_data));
2591 memcpy(info->configuration_data, private->conf_data,
2592 info->confdata_size);
2593 return 0;
2594 }
2595
2596 /*
2597 * SECTION: ioctl functions for eckd devices.
2598 */
2599
2600 /*
2601 * Release device ioctl.
2602 * Buils a channel programm to releases a prior reserved
2603 * (see dasd_eckd_reserve) device.
2604 */
2605 static int
2606 dasd_eckd_release(struct dasd_device *device)
2607 {
2608 struct dasd_ccw_req *cqr;
2609 int rc;
2610 struct ccw1 *ccw;
2611
2612 if (!capable(CAP_SYS_ADMIN))
2613 return -EACCES;
2614
2615 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2616 if (IS_ERR(cqr)) {
2617 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2618 "Could not allocate initialization request");
2619 return PTR_ERR(cqr);
2620 }
2621 ccw = cqr->cpaddr;
2622 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2623 ccw->flags |= CCW_FLAG_SLI;
2624 ccw->count = 32;
2625 ccw->cda = (__u32)(addr_t) cqr->data;
2626 cqr->startdev = device;
2627 cqr->memdev = device;
2628 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2629 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2630 cqr->retries = 2; /* set retry counter to enable basic ERP */
2631 cqr->expires = 2 * HZ;
2632 cqr->buildclk = get_clock();
2633 cqr->status = DASD_CQR_FILLED;
2634
2635 rc = dasd_sleep_on_immediatly(cqr);
2636
2637 dasd_sfree_request(cqr, cqr->memdev);
2638 return rc;
2639 }
2640
2641 /*
2642 * Reserve device ioctl.
2643 * Options are set to 'synchronous wait for interrupt' and
2644 * 'timeout the request'. This leads to a terminate IO if
2645 * the interrupt is outstanding for a certain time.
2646 */
2647 static int
2648 dasd_eckd_reserve(struct dasd_device *device)
2649 {
2650 struct dasd_ccw_req *cqr;
2651 int rc;
2652 struct ccw1 *ccw;
2653
2654 if (!capable(CAP_SYS_ADMIN))
2655 return -EACCES;
2656
2657 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2658 if (IS_ERR(cqr)) {
2659 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2660 "Could not allocate initialization request");
2661 return PTR_ERR(cqr);
2662 }
2663 ccw = cqr->cpaddr;
2664 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2665 ccw->flags |= CCW_FLAG_SLI;
2666 ccw->count = 32;
2667 ccw->cda = (__u32)(addr_t) cqr->data;
2668 cqr->startdev = device;
2669 cqr->memdev = device;
2670 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2671 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2672 cqr->retries = 2; /* set retry counter to enable basic ERP */
2673 cqr->expires = 2 * HZ;
2674 cqr->buildclk = get_clock();
2675 cqr->status = DASD_CQR_FILLED;
2676
2677 rc = dasd_sleep_on_immediatly(cqr);
2678
2679 dasd_sfree_request(cqr, cqr->memdev);
2680 return rc;
2681 }
2682
2683 /*
2684 * Steal lock ioctl - unconditional reserve device.
2685 * Buils a channel programm to break a device's reservation.
2686 * (unconditional reserve)
2687 */
2688 static int
2689 dasd_eckd_steal_lock(struct dasd_device *device)
2690 {
2691 struct dasd_ccw_req *cqr;
2692 int rc;
2693 struct ccw1 *ccw;
2694
2695 if (!capable(CAP_SYS_ADMIN))
2696 return -EACCES;
2697
2698 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2699 if (IS_ERR(cqr)) {
2700 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2701 "Could not allocate initialization request");
2702 return PTR_ERR(cqr);
2703 }
2704 ccw = cqr->cpaddr;
2705 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2706 ccw->flags |= CCW_FLAG_SLI;
2707 ccw->count = 32;
2708 ccw->cda = (__u32)(addr_t) cqr->data;
2709 cqr->startdev = device;
2710 cqr->memdev = device;
2711 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2712 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2713 cqr->retries = 2; /* set retry counter to enable basic ERP */
2714 cqr->expires = 2 * HZ;
2715 cqr->buildclk = get_clock();
2716 cqr->status = DASD_CQR_FILLED;
2717
2718 rc = dasd_sleep_on_immediatly(cqr);
2719
2720 dasd_sfree_request(cqr, cqr->memdev);
2721 return rc;
2722 }
2723
2724 /*
2725 * Read performance statistics
2726 */
2727 static int
2728 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
2729 {
2730 struct dasd_psf_prssd_data *prssdp;
2731 struct dasd_rssd_perf_stats_t *stats;
2732 struct dasd_ccw_req *cqr;
2733 struct ccw1 *ccw;
2734 int rc;
2735
2736 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
2737 (sizeof(struct dasd_psf_prssd_data) +
2738 sizeof(struct dasd_rssd_perf_stats_t)),
2739 device);
2740 if (IS_ERR(cqr)) {
2741 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2742 "Could not allocate initialization request");
2743 return PTR_ERR(cqr);
2744 }
2745 cqr->startdev = device;
2746 cqr->memdev = device;
2747 cqr->retries = 0;
2748 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2749 cqr->expires = 10 * HZ;
2750
2751 /* Prepare for Read Subsystem Data */
2752 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2753 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
2754 prssdp->order = PSF_ORDER_PRSSD;
2755 prssdp->suborder = 0x01; /* Performance Statistics */
2756 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2757
2758 ccw = cqr->cpaddr;
2759 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2760 ccw->count = sizeof(struct dasd_psf_prssd_data);
2761 ccw->flags |= CCW_FLAG_CC;
2762 ccw->cda = (__u32)(addr_t) prssdp;
2763
2764 /* Read Subsystem Data - Performance Statistics */
2765 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2766 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
2767
2768 ccw++;
2769 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2770 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
2771 ccw->cda = (__u32)(addr_t) stats;
2772
2773 cqr->buildclk = get_clock();
2774 cqr->status = DASD_CQR_FILLED;
2775 rc = dasd_sleep_on(cqr);
2776 if (rc == 0) {
2777 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2778 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2779 if (copy_to_user(argp, stats,
2780 sizeof(struct dasd_rssd_perf_stats_t)))
2781 rc = -EFAULT;
2782 }
2783 dasd_sfree_request(cqr, cqr->memdev);
2784 return rc;
2785 }
2786
2787 /*
2788 * Get attributes (cache operations)
2789 * Returnes the cache attributes used in Define Extend (DE).
2790 */
2791 static int
2792 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
2793 {
2794 struct dasd_eckd_private *private =
2795 (struct dasd_eckd_private *)device->private;
2796 struct attrib_data_t attrib = private->attrib;
2797 int rc;
2798
2799 if (!capable(CAP_SYS_ADMIN))
2800 return -EACCES;
2801 if (!argp)
2802 return -EINVAL;
2803
2804 rc = 0;
2805 if (copy_to_user(argp, (long *) &attrib,
2806 sizeof(struct attrib_data_t)))
2807 rc = -EFAULT;
2808
2809 return rc;
2810 }
2811
2812 /*
2813 * Set attributes (cache operations)
2814 * Stores the attributes for cache operation to be used in Define Extend (DE).
2815 */
2816 static int
2817 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
2818 {
2819 struct dasd_eckd_private *private =
2820 (struct dasd_eckd_private *)device->private;
2821 struct attrib_data_t attrib;
2822
2823 if (!capable(CAP_SYS_ADMIN))
2824 return -EACCES;
2825 if (!argp)
2826 return -EINVAL;
2827
2828 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
2829 return -EFAULT;
2830 private->attrib = attrib;
2831
2832 dev_info(&device->cdev->dev,
2833 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2834 private->attrib.operation, private->attrib.nr_cyl);
2835 return 0;
2836 }
2837
2838 /*
2839 * Issue syscall I/O to EMC Symmetrix array.
2840 * CCWs are PSF and RSSD
2841 */
2842 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2843 {
2844 struct dasd_symmio_parms usrparm;
2845 char *psf_data, *rssd_result;
2846 struct dasd_ccw_req *cqr;
2847 struct ccw1 *ccw;
2848 char psf0, psf1;
2849 int rc;
2850
2851 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
2852 return -EACCES;
2853 psf0 = psf1 = 0;
2854
2855 /* Copy parms from caller */
2856 rc = -EFAULT;
2857 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2858 goto out;
2859 if (is_compat_task() || sizeof(long) == 4) {
2860 /* Make sure pointers are sane even on 31 bit. */
2861 rc = -EINVAL;
2862 if ((usrparm.psf_data >> 32) != 0)
2863 goto out;
2864 if ((usrparm.rssd_result >> 32) != 0)
2865 goto out;
2866 usrparm.psf_data &= 0x7fffffffULL;
2867 usrparm.rssd_result &= 0x7fffffffULL;
2868 }
2869 /* alloc I/O data area */
2870 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2871 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2872 if (!psf_data || !rssd_result) {
2873 rc = -ENOMEM;
2874 goto out_free;
2875 }
2876
2877 /* get syscall header from user space */
2878 rc = -EFAULT;
2879 if (copy_from_user(psf_data,
2880 (void __user *)(unsigned long) usrparm.psf_data,
2881 usrparm.psf_data_len))
2882 goto out_free;
2883 psf0 = psf_data[0];
2884 psf1 = psf_data[1];
2885
2886 /* setup CCWs for PSF + RSSD */
2887 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
2888 if (IS_ERR(cqr)) {
2889 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2890 "Could not allocate initialization request");
2891 rc = PTR_ERR(cqr);
2892 goto out_free;
2893 }
2894
2895 cqr->startdev = device;
2896 cqr->memdev = device;
2897 cqr->retries = 3;
2898 cqr->expires = 10 * HZ;
2899 cqr->buildclk = get_clock();
2900 cqr->status = DASD_CQR_FILLED;
2901
2902 /* Build the ccws */
2903 ccw = cqr->cpaddr;
2904
2905 /* PSF ccw */
2906 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2907 ccw->count = usrparm.psf_data_len;
2908 ccw->flags |= CCW_FLAG_CC;
2909 ccw->cda = (__u32)(addr_t) psf_data;
2910
2911 ccw++;
2912
2913 /* RSSD ccw */
2914 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2915 ccw->count = usrparm.rssd_result_len;
2916 ccw->flags = CCW_FLAG_SLI ;
2917 ccw->cda = (__u32)(addr_t) rssd_result;
2918
2919 rc = dasd_sleep_on(cqr);
2920 if (rc)
2921 goto out_sfree;
2922
2923 rc = -EFAULT;
2924 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2925 rssd_result, usrparm.rssd_result_len))
2926 goto out_sfree;
2927 rc = 0;
2928
2929 out_sfree:
2930 dasd_sfree_request(cqr, cqr->memdev);
2931 out_free:
2932 kfree(rssd_result);
2933 kfree(psf_data);
2934 out:
2935 DBF_DEV_EVENT(DBF_WARNING, device,
2936 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
2937 (int) psf0, (int) psf1, rc);
2938 return rc;
2939 }
2940
2941 static int
2942 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
2943 {
2944 struct dasd_device *device = block->base;
2945
2946 switch (cmd) {
2947 case BIODASDGATTR:
2948 return dasd_eckd_get_attrib(device, argp);
2949 case BIODASDSATTR:
2950 return dasd_eckd_set_attrib(device, argp);
2951 case BIODASDPSRD:
2952 return dasd_eckd_performance(device, argp);
2953 case BIODASDRLSE:
2954 return dasd_eckd_release(device);
2955 case BIODASDRSRV:
2956 return dasd_eckd_reserve(device);
2957 case BIODASDSLCK:
2958 return dasd_eckd_steal_lock(device);
2959 case BIODASDSYMMIO:
2960 return dasd_symm_io(device, argp);
2961 default:
2962 return -ENOIOCTLCMD;
2963 }
2964 }
2965
2966 /*
2967 * Dump the range of CCWs into 'page' buffer
2968 * and return number of printed chars.
2969 */
2970 static int
2971 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
2972 {
2973 int len, count;
2974 char *datap;
2975
2976 len = 0;
2977 while (from <= to) {
2978 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2979 " CCW %p: %08X %08X DAT:",
2980 from, ((int *) from)[0], ((int *) from)[1]);
2981
2982 /* get pointer to data (consider IDALs) */
2983 if (from->flags & CCW_FLAG_IDA)
2984 datap = (char *) *((addr_t *) (addr_t) from->cda);
2985 else
2986 datap = (char *) ((addr_t) from->cda);
2987
2988 /* dump data (max 32 bytes) */
2989 for (count = 0; count < from->count && count < 32; count++) {
2990 if (count % 8 == 0) len += sprintf(page + len, " ");
2991 if (count % 4 == 0) len += sprintf(page + len, " ");
2992 len += sprintf(page + len, "%02x", datap[count]);
2993 }
2994 len += sprintf(page + len, "\n");
2995 from++;
2996 }
2997 return len;
2998 }
2999
3000 static void
3001 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
3002 char *reason)
3003 {
3004 u64 *sense;
3005
3006 sense = (u64 *) dasd_get_sense(irb);
3007 if (sense) {
3008 DBF_DEV_EVENT(DBF_EMERG, device,
3009 "%s: %s %02x%02x%02x %016llx %016llx %016llx "
3010 "%016llx", reason,
3011 scsw_is_tm(&irb->scsw) ? "t" : "c",
3012 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
3013 scsw_dstat(&irb->scsw), sense[0], sense[1],
3014 sense[2], sense[3]);
3015 } else {
3016 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
3017 "SORRY - NO VALID SENSE AVAILABLE\n");
3018 }
3019 }
3020
3021 /*
3022 * Print sense data and related channel program.
3023 * Parts are printed because printk buffer is only 1024 bytes.
3024 */
3025 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
3026 struct dasd_ccw_req *req, struct irb *irb)
3027 {
3028 char *page;
3029 struct ccw1 *first, *last, *fail, *from, *to;
3030 int len, sl, sct;
3031
3032 page = (char *) get_zeroed_page(GFP_ATOMIC);
3033 if (page == NULL) {
3034 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3035 "No memory to dump sense data\n");
3036 return;
3037 }
3038 /* dump the sense data */
3039 len = sprintf(page, KERN_ERR PRINTK_HEADER
3040 " I/O status report for device %s:\n",
3041 dev_name(&device->cdev->dev));
3042 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3043 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
3044 req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3045 scsw_cc(&irb->scsw), req ? req->intrc : 0);
3046 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3047 " device %s: Failing CCW: %p\n",
3048 dev_name(&device->cdev->dev),
3049 (void *) (addr_t) irb->scsw.cmd.cpa);
3050 if (irb->esw.esw0.erw.cons) {
3051 for (sl = 0; sl < 4; sl++) {
3052 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3053 " Sense(hex) %2d-%2d:",
3054 (8 * sl), ((8 * sl) + 7));
3055
3056 for (sct = 0; sct < 8; sct++) {
3057 len += sprintf(page + len, " %02x",
3058 irb->ecw[8 * sl + sct]);
3059 }
3060 len += sprintf(page + len, "\n");
3061 }
3062
3063 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3064 /* 24 Byte Sense Data */
3065 sprintf(page + len, KERN_ERR PRINTK_HEADER
3066 " 24 Byte: %x MSG %x, "
3067 "%s MSGb to SYSOP\n",
3068 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3069 irb->ecw[1] & 0x10 ? "" : "no");
3070 } else {
3071 /* 32 Byte Sense Data */
3072 sprintf(page + len, KERN_ERR PRINTK_HEADER
3073 " 32 Byte: Format: %x "
3074 "Exception class %x\n",
3075 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
3076 }
3077 } else {
3078 sprintf(page + len, KERN_ERR PRINTK_HEADER
3079 " SORRY - NO VALID SENSE AVAILABLE\n");
3080 }
3081 printk("%s", page);
3082
3083 if (req) {
3084 /* req == NULL for unsolicited interrupts */
3085 /* dump the Channel Program (max 140 Bytes per line) */
3086 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3087 first = req->cpaddr;
3088 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3089 to = min(first + 6, last);
3090 len = sprintf(page, KERN_ERR PRINTK_HEADER
3091 " Related CP in req: %p\n", req);
3092 dasd_eckd_dump_ccw_range(first, to, page + len);
3093 printk("%s", page);
3094
3095 /* print failing CCW area (maximum 4) */
3096 /* scsw->cda is either valid or zero */
3097 len = 0;
3098 from = ++to;
3099 fail = (struct ccw1 *)(addr_t)
3100 irb->scsw.cmd.cpa; /* failing CCW */
3101 if (from < fail - 2) {
3102 from = fail - 2; /* there is a gap - print header */
3103 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3104 }
3105 to = min(fail + 1, last);
3106 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3107
3108 /* print last CCWs (maximum 2) */
3109 from = max(from, ++to);
3110 if (from < last - 1) {
3111 from = last - 1; /* there is a gap - print header */
3112 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3113 }
3114 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3115 if (len > 0)
3116 printk("%s", page);
3117 }
3118 free_page((unsigned long) page);
3119 }
3120
3121
3122 /*
3123 * Print sense data from a tcw.
3124 */
3125 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3126 struct dasd_ccw_req *req, struct irb *irb)
3127 {
3128 char *page;
3129 int len, sl, sct, residual;
3130
3131 struct tsb *tsb;
3132 u8 *sense;
3133
3134
3135 page = (char *) get_zeroed_page(GFP_ATOMIC);
3136 if (page == NULL) {
3137 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
3138 "No memory to dump sense data");
3139 return;
3140 }
3141 /* dump the sense data */
3142 len = sprintf(page, KERN_ERR PRINTK_HEADER
3143 " I/O status report for device %s:\n",
3144 dev_name(&device->cdev->dev));
3145 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3146 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
3147 "fcxs: 0x%02X schxs: 0x%02X\n", req,
3148 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3149 scsw_cc(&irb->scsw), req->intrc,
3150 irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3151 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3152 " device %s: Failing TCW: %p\n",
3153 dev_name(&device->cdev->dev),
3154 (void *) (addr_t) irb->scsw.tm.tcw);
3155
3156 tsb = NULL;
3157 sense = NULL;
3158 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01))
3159 tsb = tcw_get_tsb(
3160 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3161
3162 if (tsb) {
3163 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3164 " tsb->length %d\n", tsb->length);
3165 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3166 " tsb->flags %x\n", tsb->flags);
3167 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3168 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3169 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3170 " tsb->count %d\n", tsb->count);
3171 residual = tsb->count - 28;
3172 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3173 " residual %d\n", residual);
3174
3175 switch (tsb->flags & 0x07) {
3176 case 1: /* tsa_iostat */
3177 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3178 " tsb->tsa.iostat.dev_time %d\n",
3179 tsb->tsa.iostat.dev_time);
3180 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3181 " tsb->tsa.iostat.def_time %d\n",
3182 tsb->tsa.iostat.def_time);
3183 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3184 " tsb->tsa.iostat.queue_time %d\n",
3185 tsb->tsa.iostat.queue_time);
3186 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3187 " tsb->tsa.iostat.dev_busy_time %d\n",
3188 tsb->tsa.iostat.dev_busy_time);
3189 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3190 " tsb->tsa.iostat.dev_act_time %d\n",
3191 tsb->tsa.iostat.dev_act_time);
3192 sense = tsb->tsa.iostat.sense;
3193 break;
3194 case 2: /* ts_ddpc */
3195 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3196 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3197 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3198 " tsb->tsa.ddpc.rcq: ");
3199 for (sl = 0; sl < 16; sl++) {
3200 for (sct = 0; sct < 8; sct++) {
3201 len += sprintf(page + len, " %02x",
3202 tsb->tsa.ddpc.rcq[sl]);
3203 }
3204 len += sprintf(page + len, "\n");
3205 }
3206 sense = tsb->tsa.ddpc.sense;
3207 break;
3208 case 3: /* tsa_intrg */
3209 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3210 " tsb->tsa.intrg.: not supportet yet \n");
3211 break;
3212 }
3213
3214 if (sense) {
3215 for (sl = 0; sl < 4; sl++) {
3216 len += sprintf(page + len,
3217 KERN_ERR PRINTK_HEADER
3218 " Sense(hex) %2d-%2d:",
3219 (8 * sl), ((8 * sl) + 7));
3220 for (sct = 0; sct < 8; sct++) {
3221 len += sprintf(page + len, " %02x",
3222 sense[8 * sl + sct]);
3223 }
3224 len += sprintf(page + len, "\n");
3225 }
3226
3227 if (sense[27] & DASD_SENSE_BIT_0) {
3228 /* 24 Byte Sense Data */
3229 sprintf(page + len, KERN_ERR PRINTK_HEADER
3230 " 24 Byte: %x MSG %x, "
3231 "%s MSGb to SYSOP\n",
3232 sense[7] >> 4, sense[7] & 0x0f,
3233 sense[1] & 0x10 ? "" : "no");
3234 } else {
3235 /* 32 Byte Sense Data */
3236 sprintf(page + len, KERN_ERR PRINTK_HEADER
3237 " 32 Byte: Format: %x "
3238 "Exception class %x\n",
3239 sense[6] & 0x0f, sense[22] >> 4);
3240 }
3241 } else {
3242 sprintf(page + len, KERN_ERR PRINTK_HEADER
3243 " SORRY - NO VALID SENSE AVAILABLE\n");
3244 }
3245 } else {
3246 sprintf(page + len, KERN_ERR PRINTK_HEADER
3247 " SORRY - NO TSB DATA AVAILABLE\n");
3248 }
3249 printk("%s", page);
3250 free_page((unsigned long) page);
3251 }
3252
3253 static void dasd_eckd_dump_sense(struct dasd_device *device,
3254 struct dasd_ccw_req *req, struct irb *irb)
3255 {
3256 if (req && scsw_is_tm(&req->irb.scsw))
3257 dasd_eckd_dump_sense_tcw(device, req, irb);
3258 else
3259 dasd_eckd_dump_sense_ccw(device, req, irb);
3260 }
3261
3262 int dasd_eckd_pm_freeze(struct dasd_device *device)
3263 {
3264 /*
3265 * the device should be disconnected from our LCU structure
3266 * on restore we will reconnect it and reread LCU specific
3267 * information like PAV support that might have changed
3268 */
3269 dasd_alias_remove_device(device);
3270 dasd_alias_disconnect_device_from_lcu(device);
3271
3272 return 0;
3273 }
3274
3275 int dasd_eckd_restore_device(struct dasd_device *device)
3276 {
3277 struct dasd_eckd_private *private;
3278 struct dasd_eckd_characteristics temp_rdc_data;
3279 int is_known, rc;
3280 struct dasd_uid temp_uid;
3281 unsigned long flags;
3282
3283 private = (struct dasd_eckd_private *) device->private;
3284
3285 /* Read Configuration Data */
3286 rc = dasd_eckd_read_conf(device);
3287 if (rc)
3288 goto out_err;
3289
3290 /* Generate device unique id and register in devmap */
3291 rc = dasd_eckd_generate_uid(device, &private->uid);
3292 dasd_get_uid(device->cdev, &temp_uid);
3293 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
3294 dev_err(&device->cdev->dev, "The UID of the DASD has "
3295 "changed\n");
3296 if (rc)
3297 goto out_err;
3298 dasd_set_uid(device->cdev, &private->uid);
3299
3300 /* register lcu with alias handling, enable PAV if this is a new lcu */
3301 is_known = dasd_alias_make_device_known_to_lcu(device);
3302 if (is_known < 0)
3303 return is_known;
3304 if (!is_known) {
3305 dasd_eckd_validate_server(device);
3306 dasd_alias_lcu_setup_complete(device);
3307 } else
3308 dasd_alias_wait_for_lcu_setup(device);
3309
3310 /* RE-Read Configuration Data */
3311 rc = dasd_eckd_read_conf(device);
3312 if (rc)
3313 goto out_err;
3314
3315 /* Read Feature Codes */
3316 dasd_eckd_read_features(device);
3317
3318 /* Read Device Characteristics */
3319 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
3320 &temp_rdc_data, 64);
3321 if (rc) {
3322 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
3323 "Read device characteristic failed, rc=%d", rc);
3324 goto out_err;
3325 }
3326 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
3327 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
3328 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3329
3330 /* add device to alias management */
3331 dasd_alias_add_device(device);
3332
3333 return 0;
3334
3335 out_err:
3336 return -1;
3337 }
3338
3339 static struct ccw_driver dasd_eckd_driver = {
3340 .name = "dasd-eckd",
3341 .owner = THIS_MODULE,
3342 .ids = dasd_eckd_ids,
3343 .probe = dasd_eckd_probe,
3344 .remove = dasd_generic_remove,
3345 .set_offline = dasd_generic_set_offline,
3346 .set_online = dasd_eckd_set_online,
3347 .notify = dasd_generic_notify,
3348 .freeze = dasd_generic_pm_freeze,
3349 .thaw = dasd_generic_restore_device,
3350 .restore = dasd_generic_restore_device,
3351 };
3352
3353 /*
3354 * max_blocks is dependent on the amount of storage that is available
3355 * in the static io buffer for each device. Currently each device has
3356 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3357 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3358 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3359 * addition we have one define extent ccw + 16 bytes of data and one
3360 * locate record ccw + 16 bytes of data. That makes:
3361 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3362 * We want to fit two into the available memory so that we can immediately
3363 * start the next request if one finishes off. That makes 249.5 blocks
3364 * for one request. Give a little safety and the result is 240.
3365 */
3366 static struct dasd_discipline dasd_eckd_discipline = {
3367 .owner = THIS_MODULE,
3368 .name = "ECKD",
3369 .ebcname = "ECKD",
3370 .max_blocks = 240,
3371 .check_device = dasd_eckd_check_characteristics,
3372 .uncheck_device = dasd_eckd_uncheck_device,
3373 .do_analysis = dasd_eckd_do_analysis,
3374 .ready_to_online = dasd_eckd_ready_to_online,
3375 .online_to_ready = dasd_eckd_online_to_ready,
3376 .fill_geometry = dasd_eckd_fill_geometry,
3377 .start_IO = dasd_start_IO,
3378 .term_IO = dasd_term_IO,
3379 .handle_terminated_request = dasd_eckd_handle_terminated_request,
3380 .format_device = dasd_eckd_format_device,
3381 .erp_action = dasd_eckd_erp_action,
3382 .erp_postaction = dasd_eckd_erp_postaction,
3383 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3384 .build_cp = dasd_eckd_build_alias_cp,
3385 .free_cp = dasd_eckd_free_alias_cp,
3386 .dump_sense = dasd_eckd_dump_sense,
3387 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
3388 .fill_info = dasd_eckd_fill_info,
3389 .ioctl = dasd_eckd_ioctl,
3390 .freeze = dasd_eckd_pm_freeze,
3391 .restore = dasd_eckd_restore_device,
3392 };
3393
3394 static int __init
3395 dasd_eckd_init(void)
3396 {
3397 int ret;
3398
3399 ASCEBC(dasd_eckd_discipline.ebcname, 4);
3400 ret = ccw_driver_register(&dasd_eckd_driver);
3401 if (!ret)
3402 wait_for_device_probe();
3403
3404 return ret;
3405 }
3406
3407 static void __exit
3408 dasd_eckd_cleanup(void)
3409 {
3410 ccw_driver_unregister(&dasd_eckd_driver);
3411 }
3412
3413 module_init(dasd_eckd_init);
3414 module_exit(dasd_eckd_cleanup);