?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
x86, UV: Fix for nodes with memory and no cpus
[linux/fpc-iii.git] / drivers / s390 / block / dasd_eckd.c
blob21254793c60416e9f2162e7e962f5741b07d39b3
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 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
11 *
12 */
13
14 #define KMSG_COMPONENT "dasd"
15
16 #include <linux/stddef.h>
17 #include <linux/kernel.h>
18 #include <linux/slab.h>
19 #include <linux/hdreg.h> /* HDIO_GETGEO */
20 #include <linux/bio.h>
21 #include <linux/module.h>
22 #include <linux/init.h>
23
24 #include <asm/debug.h>
25 #include <asm/idals.h>
26 #include <asm/ebcdic.h>
27 #include <asm/io.h>
28 #include <asm/todclk.h>
29 #include <asm/uaccess.h>
30 #include <asm/cio.h>
31 #include <asm/ccwdev.h>
32 #include <asm/itcw.h>
33
34 #include "dasd_int.h"
35 #include "dasd_eckd.h"
36 #include "../cio/chsc.h"
37
38
39 #ifdef PRINTK_HEADER
40 #undef PRINTK_HEADER
41 #endif /* PRINTK_HEADER */
42 #define PRINTK_HEADER "dasd(eckd):"
43
44 #define ECKD_C0(i) (i->home_bytes)
45 #define ECKD_F(i) (i->formula)
46 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
47 (i->factors.f_0x02.f1))
48 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
49 (i->factors.f_0x02.f2))
50 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
51 (i->factors.f_0x02.f3))
52 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
53 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
54 #define ECKD_F6(i) (i->factor6)
55 #define ECKD_F7(i) (i->factor7)
56 #define ECKD_F8(i) (i->factor8)
57
58 MODULE_LICENSE("GPL");
59
60 static struct dasd_discipline dasd_eckd_discipline;
61
62 /* The ccw bus type uses this table to find devices that it sends to
63 * dasd_eckd_probe */
64 static struct ccw_device_id dasd_eckd_ids[] = {
65 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
66 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
67 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
68 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
69 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
70 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
71 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
72 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
73 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
74 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
75 { /* end of list */ },
76 };
77
78 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
79
80 static struct ccw_driver dasd_eckd_driver; /* see below */
81
82 /* initial attempt at a probe function. this can be simplified once
83 * the other detection code is gone */
84 static int
85 dasd_eckd_probe (struct ccw_device *cdev)
86 {
87 int ret;
88
89 /* set ECKD specific ccw-device options */
90 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE);
91 if (ret) {
92 DBF_EVENT(DBF_WARNING,
93 "dasd_eckd_probe: could not set ccw-device options "
94 "for %s\n", dev_name(&cdev->dev));
95 return ret;
96 }
97 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
98 return ret;
99 }
100
101 static int
102 dasd_eckd_set_online(struct ccw_device *cdev)
103 {
104 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
105 }
106
107 static struct ccw_driver dasd_eckd_driver = {
108 .name = "dasd-eckd",
109 .owner = THIS_MODULE,
110 .ids = dasd_eckd_ids,
111 .probe = dasd_eckd_probe,
112 .remove = dasd_generic_remove,
113 .set_offline = dasd_generic_set_offline,
114 .set_online = dasd_eckd_set_online,
115 .notify = dasd_generic_notify,
116 };
117
118 static const int sizes_trk0[] = { 28, 148, 84 };
119 #define LABEL_SIZE 140
120
121 static inline unsigned int
122 round_up_multiple(unsigned int no, unsigned int mult)
123 {
124 int rem = no % mult;
125 return (rem ? no - rem + mult : no);
126 }
127
128 static inline unsigned int
129 ceil_quot(unsigned int d1, unsigned int d2)
130 {
131 return (d1 + (d2 - 1)) / d2;
132 }
133
134 static unsigned int
135 recs_per_track(struct dasd_eckd_characteristics * rdc,
136 unsigned int kl, unsigned int dl)
137 {
138 int dn, kn;
139
140 switch (rdc->dev_type) {
141 case 0x3380:
142 if (kl)
143 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
144 ceil_quot(dl + 12, 32));
145 else
146 return 1499 / (15 + ceil_quot(dl + 12, 32));
147 case 0x3390:
148 dn = ceil_quot(dl + 6, 232) + 1;
149 if (kl) {
150 kn = ceil_quot(kl + 6, 232) + 1;
151 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
152 9 + ceil_quot(dl + 6 * dn, 34));
153 } else
154 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
155 case 0x9345:
156 dn = ceil_quot(dl + 6, 232) + 1;
157 if (kl) {
158 kn = ceil_quot(kl + 6, 232) + 1;
159 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
160 ceil_quot(dl + 6 * dn, 34));
161 } else
162 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
163 }
164 return 0;
165 }
166
167 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
168 {
169 geo->cyl = (__u16) cyl;
170 geo->head = cyl >> 16;
171 geo->head <<= 4;
172 geo->head |= head;
173 }
174
175 static int
176 check_XRC (struct ccw1 *de_ccw,
177 struct DE_eckd_data *data,
178 struct dasd_device *device)
179 {
180 struct dasd_eckd_private *private;
181 int rc;
182
183 private = (struct dasd_eckd_private *) device->private;
184 if (!private->rdc_data.facilities.XRC_supported)
185 return 0;
186
187 /* switch on System Time Stamp - needed for XRC Support */
188 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
189 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
190
191 rc = get_sync_clock(&data->ep_sys_time);
192 /* Ignore return code if sync clock is switched off. */
193 if (rc == -ENOSYS || rc == -EACCES)
194 rc = 0;
195
196 de_ccw->count = sizeof(struct DE_eckd_data);
197 de_ccw->flags |= CCW_FLAG_SLI;
198 return rc;
199 }
200
201 static int
202 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
203 unsigned int totrk, int cmd, struct dasd_device *device)
204 {
205 struct dasd_eckd_private *private;
206 u32 begcyl, endcyl;
207 u16 heads, beghead, endhead;
208 int rc = 0;
209
210 private = (struct dasd_eckd_private *) device->private;
211
212 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
213 ccw->flags = 0;
214 ccw->count = 16;
215 ccw->cda = (__u32) __pa(data);
216
217 memset(data, 0, sizeof(struct DE_eckd_data));
218 switch (cmd) {
219 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
220 case DASD_ECKD_CCW_READ_RECORD_ZERO:
221 case DASD_ECKD_CCW_READ:
222 case DASD_ECKD_CCW_READ_MT:
223 case DASD_ECKD_CCW_READ_CKD:
224 case DASD_ECKD_CCW_READ_CKD_MT:
225 case DASD_ECKD_CCW_READ_KD:
226 case DASD_ECKD_CCW_READ_KD_MT:
227 case DASD_ECKD_CCW_READ_COUNT:
228 data->mask.perm = 0x1;
229 data->attributes.operation = private->attrib.operation;
230 break;
231 case DASD_ECKD_CCW_WRITE:
232 case DASD_ECKD_CCW_WRITE_MT:
233 case DASD_ECKD_CCW_WRITE_KD:
234 case DASD_ECKD_CCW_WRITE_KD_MT:
235 data->mask.perm = 0x02;
236 data->attributes.operation = private->attrib.operation;
237 rc = check_XRC (ccw, data, device);
238 break;
239 case DASD_ECKD_CCW_WRITE_CKD:
240 case DASD_ECKD_CCW_WRITE_CKD_MT:
241 data->attributes.operation = DASD_BYPASS_CACHE;
242 rc = check_XRC (ccw, data, device);
243 break;
244 case DASD_ECKD_CCW_ERASE:
245 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
246 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
247 data->mask.perm = 0x3;
248 data->mask.auth = 0x1;
249 data->attributes.operation = DASD_BYPASS_CACHE;
250 rc = check_XRC (ccw, data, device);
251 break;
252 default:
253 dev_err(&device->cdev->dev,
254 "0x%x is not a known command\n", cmd);
255 break;
256 }
257
258 data->attributes.mode = 0x3; /* ECKD */
259
260 if ((private->rdc_data.cu_type == 0x2105 ||
261 private->rdc_data.cu_type == 0x2107 ||
262 private->rdc_data.cu_type == 0x1750)
263 && !(private->uses_cdl && trk < 2))
264 data->ga_extended |= 0x40; /* Regular Data Format Mode */
265
266 heads = private->rdc_data.trk_per_cyl;
267 begcyl = trk / heads;
268 beghead = trk % heads;
269 endcyl = totrk / heads;
270 endhead = totrk % heads;
271
272 /* check for sequential prestage - enhance cylinder range */
273 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
274 data->attributes.operation == DASD_SEQ_ACCESS) {
275
276 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
277 endcyl += private->attrib.nr_cyl;
278 else
279 endcyl = (private->real_cyl - 1);
280 }
281
282 set_ch_t(&data->beg_ext, begcyl, beghead);
283 set_ch_t(&data->end_ext, endcyl, endhead);
284 return rc;
285 }
286
287 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
288 struct dasd_device *device)
289 {
290 struct dasd_eckd_private *private;
291 int rc;
292
293 private = (struct dasd_eckd_private *) device->private;
294 if (!private->rdc_data.facilities.XRC_supported)
295 return 0;
296
297 /* switch on System Time Stamp - needed for XRC Support */
298 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
299 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
300 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
301
302 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
303 /* Ignore return code if sync clock is switched off. */
304 if (rc == -ENOSYS || rc == -EACCES)
305 rc = 0;
306 return rc;
307 }
308
309 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
310 unsigned int rec_on_trk, int count, int cmd,
311 struct dasd_device *device, unsigned int reclen,
312 unsigned int tlf)
313 {
314 struct dasd_eckd_private *private;
315 int sector;
316 int dn, d;
317
318 private = (struct dasd_eckd_private *) device->private;
319
320 memset(data, 0, sizeof(*data));
321 sector = 0;
322 if (rec_on_trk) {
323 switch (private->rdc_data.dev_type) {
324 case 0x3390:
325 dn = ceil_quot(reclen + 6, 232);
326 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
327 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
328 break;
329 case 0x3380:
330 d = 7 + ceil_quot(reclen + 12, 32);
331 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
332 break;
333 }
334 }
335 data->sector = sector;
336 /* note: meaning of count depends on the operation
337 * for record based I/O it's the number of records, but for
338 * track based I/O it's the number of tracks
339 */
340 data->count = count;
341 switch (cmd) {
342 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
343 data->operation.orientation = 0x3;
344 data->operation.operation = 0x03;
345 break;
346 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
347 data->operation.orientation = 0x3;
348 data->operation.operation = 0x16;
349 break;
350 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
351 data->operation.orientation = 0x1;
352 data->operation.operation = 0x03;
353 data->count++;
354 break;
355 case DASD_ECKD_CCW_READ_RECORD_ZERO:
356 data->operation.orientation = 0x3;
357 data->operation.operation = 0x16;
358 data->count++;
359 break;
360 case DASD_ECKD_CCW_WRITE:
361 case DASD_ECKD_CCW_WRITE_MT:
362 case DASD_ECKD_CCW_WRITE_KD:
363 case DASD_ECKD_CCW_WRITE_KD_MT:
364 data->auxiliary.length_valid = 0x1;
365 data->length = reclen;
366 data->operation.operation = 0x01;
367 break;
368 case DASD_ECKD_CCW_WRITE_CKD:
369 case DASD_ECKD_CCW_WRITE_CKD_MT:
370 data->auxiliary.length_valid = 0x1;
371 data->length = reclen;
372 data->operation.operation = 0x03;
373 break;
374 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
375 data->auxiliary.length_valid = 0x1;
376 data->length = reclen; /* not tlf, as one might think */
377 data->operation.operation = 0x3F;
378 data->extended_operation = 0x23;
379 break;
380 case DASD_ECKD_CCW_READ:
381 case DASD_ECKD_CCW_READ_MT:
382 case DASD_ECKD_CCW_READ_KD:
383 case DASD_ECKD_CCW_READ_KD_MT:
384 data->auxiliary.length_valid = 0x1;
385 data->length = reclen;
386 data->operation.operation = 0x06;
387 break;
388 case DASD_ECKD_CCW_READ_CKD:
389 case DASD_ECKD_CCW_READ_CKD_MT:
390 data->auxiliary.length_valid = 0x1;
391 data->length = reclen;
392 data->operation.operation = 0x16;
393 break;
394 case DASD_ECKD_CCW_READ_COUNT:
395 data->operation.operation = 0x06;
396 break;
397 case DASD_ECKD_CCW_READ_TRACK_DATA:
398 data->auxiliary.length_valid = 0x1;
399 data->length = tlf;
400 data->operation.operation = 0x0C;
401 break;
402 case DASD_ECKD_CCW_ERASE:
403 data->length = reclen;
404 data->auxiliary.length_valid = 0x1;
405 data->operation.operation = 0x0b;
406 break;
407 default:
408 DBF_DEV_EVENT(DBF_ERR, device,
409 "fill LRE unknown opcode 0x%x", cmd);
410 BUG();
411 }
412 set_ch_t(&data->seek_addr,
413 trk / private->rdc_data.trk_per_cyl,
414 trk % private->rdc_data.trk_per_cyl);
415 data->search_arg.cyl = data->seek_addr.cyl;
416 data->search_arg.head = data->seek_addr.head;
417 data->search_arg.record = rec_on_trk;
418 }
419
420 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
421 unsigned int trk, unsigned int totrk, int cmd,
422 struct dasd_device *basedev, struct dasd_device *startdev,
423 unsigned char format, unsigned int rec_on_trk, int count,
424 unsigned int blksize, unsigned int tlf)
425 {
426 struct dasd_eckd_private *basepriv, *startpriv;
427 struct DE_eckd_data *dedata;
428 struct LRE_eckd_data *lredata;
429 u32 begcyl, endcyl;
430 u16 heads, beghead, endhead;
431 int rc = 0;
432
433 basepriv = (struct dasd_eckd_private *) basedev->private;
434 startpriv = (struct dasd_eckd_private *) startdev->private;
435 dedata = &pfxdata->define_extent;
436 lredata = &pfxdata->locate_record;
437
438 ccw->cmd_code = DASD_ECKD_CCW_PFX;
439 ccw->flags = 0;
440 ccw->count = sizeof(*pfxdata);
441 ccw->cda = (__u32) __pa(pfxdata);
442
443 memset(pfxdata, 0, sizeof(*pfxdata));
444 /* prefix data */
445 if (format > 1) {
446 DBF_DEV_EVENT(DBF_ERR, basedev,
447 "PFX LRE unknown format 0x%x", format);
448 BUG();
449 return -EINVAL;
450 }
451 pfxdata->format = format;
452 pfxdata->base_address = basepriv->ned->unit_addr;
453 pfxdata->base_lss = basepriv->ned->ID;
454 pfxdata->validity.define_extent = 1;
455
456 /* private uid is kept up to date, conf_data may be outdated */
457 if (startpriv->uid.type != UA_BASE_DEVICE) {
458 pfxdata->validity.verify_base = 1;
459 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
460 pfxdata->validity.hyper_pav = 1;
461 }
462
463 /* define extend data (mostly)*/
464 switch (cmd) {
465 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
466 case DASD_ECKD_CCW_READ_RECORD_ZERO:
467 case DASD_ECKD_CCW_READ:
468 case DASD_ECKD_CCW_READ_MT:
469 case DASD_ECKD_CCW_READ_CKD:
470 case DASD_ECKD_CCW_READ_CKD_MT:
471 case DASD_ECKD_CCW_READ_KD:
472 case DASD_ECKD_CCW_READ_KD_MT:
473 case DASD_ECKD_CCW_READ_COUNT:
474 dedata->mask.perm = 0x1;
475 dedata->attributes.operation = basepriv->attrib.operation;
476 break;
477 case DASD_ECKD_CCW_READ_TRACK_DATA:
478 dedata->mask.perm = 0x1;
479 dedata->attributes.operation = basepriv->attrib.operation;
480 dedata->blk_size = 0;
481 break;
482 case DASD_ECKD_CCW_WRITE:
483 case DASD_ECKD_CCW_WRITE_MT:
484 case DASD_ECKD_CCW_WRITE_KD:
485 case DASD_ECKD_CCW_WRITE_KD_MT:
486 dedata->mask.perm = 0x02;
487 dedata->attributes.operation = basepriv->attrib.operation;
488 rc = check_XRC_on_prefix(pfxdata, basedev);
489 break;
490 case DASD_ECKD_CCW_WRITE_CKD:
491 case DASD_ECKD_CCW_WRITE_CKD_MT:
492 dedata->attributes.operation = DASD_BYPASS_CACHE;
493 rc = check_XRC_on_prefix(pfxdata, basedev);
494 break;
495 case DASD_ECKD_CCW_ERASE:
496 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
497 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
498 dedata->mask.perm = 0x3;
499 dedata->mask.auth = 0x1;
500 dedata->attributes.operation = DASD_BYPASS_CACHE;
501 rc = check_XRC_on_prefix(pfxdata, basedev);
502 break;
503 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
504 dedata->mask.perm = 0x02;
505 dedata->attributes.operation = basepriv->attrib.operation;
506 dedata->blk_size = blksize;
507 rc = check_XRC_on_prefix(pfxdata, basedev);
508 break;
509 default:
510 DBF_DEV_EVENT(DBF_ERR, basedev,
511 "PFX LRE unknown opcode 0x%x", cmd);
512 BUG();
513 return -EINVAL;
514 }
515
516 dedata->attributes.mode = 0x3; /* ECKD */
517
518 if ((basepriv->rdc_data.cu_type == 0x2105 ||
519 basepriv->rdc_data.cu_type == 0x2107 ||
520 basepriv->rdc_data.cu_type == 0x1750)
521 && !(basepriv->uses_cdl && trk < 2))
522 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
523
524 heads = basepriv->rdc_data.trk_per_cyl;
525 begcyl = trk / heads;
526 beghead = trk % heads;
527 endcyl = totrk / heads;
528 endhead = totrk % heads;
529
530 /* check for sequential prestage - enhance cylinder range */
531 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
532 dedata->attributes.operation == DASD_SEQ_ACCESS) {
533
534 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
535 endcyl += basepriv->attrib.nr_cyl;
536 else
537 endcyl = (basepriv->real_cyl - 1);
538 }
539
540 set_ch_t(&dedata->beg_ext, begcyl, beghead);
541 set_ch_t(&dedata->end_ext, endcyl, endhead);
542
543 if (format == 1) {
544 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
545 basedev, blksize, tlf);
546 }
547
548 return rc;
549 }
550
551 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
552 unsigned int trk, unsigned int totrk, int cmd,
553 struct dasd_device *basedev, struct dasd_device *startdev)
554 {
555 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
556 0, 0, 0, 0, 0);
557 }
558
559 static void
560 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
561 unsigned int rec_on_trk, int no_rec, int cmd,
562 struct dasd_device * device, int reclen)
563 {
564 struct dasd_eckd_private *private;
565 int sector;
566 int dn, d;
567
568 private = (struct dasd_eckd_private *) device->private;
569
570 DBF_DEV_EVENT(DBF_INFO, device,
571 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
572 trk, rec_on_trk, no_rec, cmd, reclen);
573
574 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
575 ccw->flags = 0;
576 ccw->count = 16;
577 ccw->cda = (__u32) __pa(data);
578
579 memset(data, 0, sizeof(struct LO_eckd_data));
580 sector = 0;
581 if (rec_on_trk) {
582 switch (private->rdc_data.dev_type) {
583 case 0x3390:
584 dn = ceil_quot(reclen + 6, 232);
585 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
586 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
587 break;
588 case 0x3380:
589 d = 7 + ceil_quot(reclen + 12, 32);
590 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
591 break;
592 }
593 }
594 data->sector = sector;
595 data->count = no_rec;
596 switch (cmd) {
597 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
598 data->operation.orientation = 0x3;
599 data->operation.operation = 0x03;
600 break;
601 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
602 data->operation.orientation = 0x3;
603 data->operation.operation = 0x16;
604 break;
605 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
606 data->operation.orientation = 0x1;
607 data->operation.operation = 0x03;
608 data->count++;
609 break;
610 case DASD_ECKD_CCW_READ_RECORD_ZERO:
611 data->operation.orientation = 0x3;
612 data->operation.operation = 0x16;
613 data->count++;
614 break;
615 case DASD_ECKD_CCW_WRITE:
616 case DASD_ECKD_CCW_WRITE_MT:
617 case DASD_ECKD_CCW_WRITE_KD:
618 case DASD_ECKD_CCW_WRITE_KD_MT:
619 data->auxiliary.last_bytes_used = 0x1;
620 data->length = reclen;
621 data->operation.operation = 0x01;
622 break;
623 case DASD_ECKD_CCW_WRITE_CKD:
624 case DASD_ECKD_CCW_WRITE_CKD_MT:
625 data->auxiliary.last_bytes_used = 0x1;
626 data->length = reclen;
627 data->operation.operation = 0x03;
628 break;
629 case DASD_ECKD_CCW_READ:
630 case DASD_ECKD_CCW_READ_MT:
631 case DASD_ECKD_CCW_READ_KD:
632 case DASD_ECKD_CCW_READ_KD_MT:
633 data->auxiliary.last_bytes_used = 0x1;
634 data->length = reclen;
635 data->operation.operation = 0x06;
636 break;
637 case DASD_ECKD_CCW_READ_CKD:
638 case DASD_ECKD_CCW_READ_CKD_MT:
639 data->auxiliary.last_bytes_used = 0x1;
640 data->length = reclen;
641 data->operation.operation = 0x16;
642 break;
643 case DASD_ECKD_CCW_READ_COUNT:
644 data->operation.operation = 0x06;
645 break;
646 case DASD_ECKD_CCW_ERASE:
647 data->length = reclen;
648 data->auxiliary.last_bytes_used = 0x1;
649 data->operation.operation = 0x0b;
650 break;
651 default:
652 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
653 "opcode 0x%x", cmd);
654 }
655 set_ch_t(&data->seek_addr,
656 trk / private->rdc_data.trk_per_cyl,
657 trk % private->rdc_data.trk_per_cyl);
658 data->search_arg.cyl = data->seek_addr.cyl;
659 data->search_arg.head = data->seek_addr.head;
660 data->search_arg.record = rec_on_trk;
661 }
662
663 /*
664 * Returns 1 if the block is one of the special blocks that needs
665 * to get read/written with the KD variant of the command.
666 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
667 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
668 * Luckily the KD variants differ only by one bit (0x08) from the
669 * normal variant. So don't wonder about code like:
670 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
671 * ccw->cmd_code |= 0x8;
672 */
673 static inline int
674 dasd_eckd_cdl_special(int blk_per_trk, int recid)
675 {
676 if (recid < 3)
677 return 1;
678 if (recid < blk_per_trk)
679 return 0;
680 if (recid < 2 * blk_per_trk)
681 return 1;
682 return 0;
683 }
684
685 /*
686 * Returns the record size for the special blocks of the cdl format.
687 * Only returns something useful if dasd_eckd_cdl_special is true
688 * for the recid.
689 */
690 static inline int
691 dasd_eckd_cdl_reclen(int recid)
692 {
693 if (recid < 3)
694 return sizes_trk0[recid];
695 return LABEL_SIZE;
696 }
697
698 /*
699 * Generate device unique id that specifies the physical device.
700 */
701 static int dasd_eckd_generate_uid(struct dasd_device *device,
702 struct dasd_uid *uid)
703 {
704 struct dasd_eckd_private *private;
705 int count;
706
707 private = (struct dasd_eckd_private *) device->private;
708 if (!private)
709 return -ENODEV;
710 if (!private->ned || !private->gneq)
711 return -ENODEV;
712
713 memset(uid, 0, sizeof(struct dasd_uid));
714 memcpy(uid->vendor, private->ned->HDA_manufacturer,
715 sizeof(uid->vendor) - 1);
716 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
717 memcpy(uid->serial, private->ned->HDA_location,
718 sizeof(uid->serial) - 1);
719 EBCASC(uid->serial, sizeof(uid->serial) - 1);
720 uid->ssid = private->gneq->subsystemID;
721 uid->real_unit_addr = private->ned->unit_addr;;
722 if (private->sneq) {
723 uid->type = private->sneq->sua_flags;
724 if (uid->type == UA_BASE_PAV_ALIAS)
725 uid->base_unit_addr = private->sneq->base_unit_addr;
726 } else {
727 uid->type = UA_BASE_DEVICE;
728 }
729 if (private->vdsneq) {
730 for (count = 0; count < 16; count++) {
731 sprintf(uid->vduit+2*count, "%02x",
732 private->vdsneq->uit[count]);
733 }
734 }
735 return 0;
736 }
737
738 static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
739 void *rcd_buffer,
740 struct ciw *ciw, __u8 lpm)
741 {
742 struct dasd_ccw_req *cqr;
743 struct ccw1 *ccw;
744
745 cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device);
746
747 if (IS_ERR(cqr)) {
748 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
749 "Could not allocate RCD request");
750 return cqr;
751 }
752
753 ccw = cqr->cpaddr;
754 ccw->cmd_code = ciw->cmd;
755 ccw->cda = (__u32)(addr_t)rcd_buffer;
756 ccw->count = ciw->count;
757
758 cqr->startdev = device;
759 cqr->memdev = device;
760 cqr->block = NULL;
761 cqr->expires = 10*HZ;
762 cqr->lpm = lpm;
763 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
764 cqr->retries = 2;
765 cqr->buildclk = get_clock();
766 cqr->status = DASD_CQR_FILLED;
767 return cqr;
768 }
769
770 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
771 void **rcd_buffer,
772 int *rcd_buffer_size, __u8 lpm)
773 {
774 struct ciw *ciw;
775 char *rcd_buf = NULL;
776 int ret;
777 struct dasd_ccw_req *cqr;
778
779 /*
780 * scan for RCD command in extended SenseID data
781 */
782 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
783 if (!ciw || ciw->cmd == 0) {
784 ret = -EOPNOTSUPP;
785 goto out_error;
786 }
787 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
788 if (!rcd_buf) {
789 ret = -ENOMEM;
790 goto out_error;
791 }
792
793 /*
794 * buffer has to start with EBCDIC "V1.0" to show
795 * support for virtual device SNEQ
796 */
797 rcd_buf[0] = 0xE5;
798 rcd_buf[1] = 0xF1;
799 rcd_buf[2] = 0x4B;
800 rcd_buf[3] = 0xF0;
801 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
802 if (IS_ERR(cqr)) {
803 ret = PTR_ERR(cqr);
804 goto out_error;
805 }
806 ret = dasd_sleep_on(cqr);
807 /*
808 * on success we update the user input parms
809 */
810 dasd_sfree_request(cqr, cqr->memdev);
811 if (ret)
812 goto out_error;
813
814 *rcd_buffer_size = ciw->count;
815 *rcd_buffer = rcd_buf;
816 return 0;
817 out_error:
818 kfree(rcd_buf);
819 *rcd_buffer = NULL;
820 *rcd_buffer_size = 0;
821 return ret;
822 }
823
824 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
825 {
826
827 struct dasd_sneq *sneq;
828 int i, count;
829
830 private->ned = NULL;
831 private->sneq = NULL;
832 private->vdsneq = NULL;
833 private->gneq = NULL;
834 count = private->conf_len / sizeof(struct dasd_sneq);
835 sneq = (struct dasd_sneq *)private->conf_data;
836 for (i = 0; i < count; ++i) {
837 if (sneq->flags.identifier == 1 && sneq->format == 1)
838 private->sneq = sneq;
839 else if (sneq->flags.identifier == 1 && sneq->format == 4)
840 private->vdsneq = (struct vd_sneq *)sneq;
841 else if (sneq->flags.identifier == 2)
842 private->gneq = (struct dasd_gneq *)sneq;
843 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
844 private->ned = (struct dasd_ned *)sneq;
845 sneq++;
846 }
847 if (!private->ned || !private->gneq) {
848 private->ned = NULL;
849 private->sneq = NULL;
850 private->vdsneq = NULL;
851 private->gneq = NULL;
852 return -EINVAL;
853 }
854 return 0;
855
856 };
857
858 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
859 {
860 struct dasd_gneq *gneq;
861 int i, count, found;
862
863 count = conf_len / sizeof(*gneq);
864 gneq = (struct dasd_gneq *)conf_data;
865 found = 0;
866 for (i = 0; i < count; ++i) {
867 if (gneq->flags.identifier == 2) {
868 found = 1;
869 break;
870 }
871 gneq++;
872 }
873 if (found)
874 return ((char *)gneq)[18] & 0x07;
875 else
876 return 0;
877 }
878
879 static int dasd_eckd_read_conf(struct dasd_device *device)
880 {
881 void *conf_data;
882 int conf_len, conf_data_saved;
883 int rc;
884 __u8 lpm;
885 struct dasd_eckd_private *private;
886 struct dasd_eckd_path *path_data;
887
888 private = (struct dasd_eckd_private *) device->private;
889 path_data = (struct dasd_eckd_path *) &private->path_data;
890 path_data->opm = ccw_device_get_path_mask(device->cdev);
891 lpm = 0x80;
892 conf_data_saved = 0;
893 /* get configuration data per operational path */
894 for (lpm = 0x80; lpm; lpm>>= 1) {
895 if (lpm & path_data->opm){
896 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
897 &conf_len, lpm);
898 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
899 DBF_EVENT(DBF_WARNING,
900 "Read configuration data returned "
901 "error %d for device: %s", rc,
902 dev_name(&device->cdev->dev));
903 return rc;
904 }
905 if (conf_data == NULL) {
906 DBF_EVENT(DBF_WARNING, "No configuration "
907 "data retrieved for device: %s",
908 dev_name(&device->cdev->dev));
909 continue; /* no error */
910 }
911 /* save first valid configuration data */
912 if (!conf_data_saved) {
913 kfree(private->conf_data);
914 private->conf_data = conf_data;
915 private->conf_len = conf_len;
916 if (dasd_eckd_identify_conf_parts(private)) {
917 private->conf_data = NULL;
918 private->conf_len = 0;
919 kfree(conf_data);
920 continue;
921 }
922 conf_data_saved++;
923 }
924 switch (dasd_eckd_path_access(conf_data, conf_len)) {
925 case 0x02:
926 path_data->npm |= lpm;
927 break;
928 case 0x03:
929 path_data->ppm |= lpm;
930 break;
931 }
932 if (conf_data != private->conf_data)
933 kfree(conf_data);
934 }
935 }
936 return 0;
937 }
938
939 static int dasd_eckd_read_features(struct dasd_device *device)
940 {
941 struct dasd_psf_prssd_data *prssdp;
942 struct dasd_rssd_features *features;
943 struct dasd_ccw_req *cqr;
944 struct ccw1 *ccw;
945 int rc;
946 struct dasd_eckd_private *private;
947
948 private = (struct dasd_eckd_private *) device->private;
949 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
950 1 /* PSF */ + 1 /* RSSD */ ,
951 (sizeof(struct dasd_psf_prssd_data) +
952 sizeof(struct dasd_rssd_features)),
953 device);
954 if (IS_ERR(cqr)) {
955 DBF_EVENT(DBF_WARNING, "Could not allocate initialization "
956 "request for device: %s",
957 dev_name(&device->cdev->dev));
958 return PTR_ERR(cqr);
959 }
960 cqr->startdev = device;
961 cqr->memdev = device;
962 cqr->block = NULL;
963 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
964 cqr->retries = 5;
965 cqr->expires = 10 * HZ;
966
967 /* Prepare for Read Subsystem Data */
968 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
969 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
970 prssdp->order = PSF_ORDER_PRSSD;
971 prssdp->suborder = 0x41; /* Read Feature Codes */
972 /* all other bytes of prssdp must be zero */
973
974 ccw = cqr->cpaddr;
975 ccw->cmd_code = DASD_ECKD_CCW_PSF;
976 ccw->count = sizeof(struct dasd_psf_prssd_data);
977 ccw->flags |= CCW_FLAG_CC;
978 ccw->cda = (__u32)(addr_t) prssdp;
979
980 /* Read Subsystem Data - feature codes */
981 features = (struct dasd_rssd_features *) (prssdp + 1);
982 memset(features, 0, sizeof(struct dasd_rssd_features));
983
984 ccw++;
985 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
986 ccw->count = sizeof(struct dasd_rssd_features);
987 ccw->cda = (__u32)(addr_t) features;
988
989 cqr->buildclk = get_clock();
990 cqr->status = DASD_CQR_FILLED;
991 rc = dasd_sleep_on(cqr);
992 if (rc == 0) {
993 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
994 features = (struct dasd_rssd_features *) (prssdp + 1);
995 memcpy(&private->features, features,
996 sizeof(struct dasd_rssd_features));
997 }
998 dasd_sfree_request(cqr, cqr->memdev);
999 return rc;
1000 }
1001
1002
1003 /*
1004 * Build CP for Perform Subsystem Function - SSC.
1005 */
1006 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1007 int enable_pav)
1008 {
1009 struct dasd_ccw_req *cqr;
1010 struct dasd_psf_ssc_data *psf_ssc_data;
1011 struct ccw1 *ccw;
1012
1013 cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ ,
1014 sizeof(struct dasd_psf_ssc_data),
1015 device);
1016
1017 if (IS_ERR(cqr)) {
1018 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1019 "Could not allocate PSF-SSC request");
1020 return cqr;
1021 }
1022 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1023 psf_ssc_data->order = PSF_ORDER_SSC;
1024 psf_ssc_data->suborder = 0x40;
1025 if (enable_pav) {
1026 psf_ssc_data->suborder |= 0x88;
1027 psf_ssc_data->reserved[0] = 0x88;
1028 }
1029 ccw = cqr->cpaddr;
1030 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1031 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1032 ccw->count = 66;
1033
1034 cqr->startdev = device;
1035 cqr->memdev = device;
1036 cqr->block = NULL;
1037 cqr->expires = 10*HZ;
1038 cqr->buildclk = get_clock();
1039 cqr->status = DASD_CQR_FILLED;
1040 return cqr;
1041 }
1042
1043 /*
1044 * Perform Subsystem Function.
1045 * It is necessary to trigger CIO for channel revalidation since this
1046 * call might change behaviour of DASD devices.
1047 */
1048 static int
1049 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
1050 {
1051 struct dasd_ccw_req *cqr;
1052 int rc;
1053
1054 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1055 if (IS_ERR(cqr))
1056 return PTR_ERR(cqr);
1057
1058 rc = dasd_sleep_on(cqr);
1059 if (!rc)
1060 /* trigger CIO to reprobe devices */
1061 css_schedule_reprobe();
1062 dasd_sfree_request(cqr, cqr->memdev);
1063 return rc;
1064 }
1065
1066 /*
1067 * Valide storage server of current device.
1068 */
1069 static int dasd_eckd_validate_server(struct dasd_device *device)
1070 {
1071 int rc;
1072 struct dasd_eckd_private *private;
1073 int enable_pav;
1074
1075 if (dasd_nopav || MACHINE_IS_VM)
1076 enable_pav = 0;
1077 else
1078 enable_pav = 1;
1079 rc = dasd_eckd_psf_ssc(device, enable_pav);
1080 /* may be requested feature is not available on server,
1081 * therefore just report error and go ahead */
1082 private = (struct dasd_eckd_private *) device->private;
1083 DBF_EVENT(DBF_WARNING, "PSF-SSC on storage subsystem %s.%s.%04x "
1084 "returned rc=%d for device: %s",
1085 private->uid.vendor, private->uid.serial,
1086 private->uid.ssid, rc, dev_name(&device->cdev->dev));
1087 /* RE-Read Configuration Data */
1088 return dasd_eckd_read_conf(device);
1089 }
1090
1091 /*
1092 * Check device characteristics.
1093 * If the device is accessible using ECKD discipline, the device is enabled.
1094 */
1095 static int
1096 dasd_eckd_check_characteristics(struct dasd_device *device)
1097 {
1098 struct dasd_eckd_private *private;
1099 struct dasd_block *block;
1100 void *rdc_data;
1101 int is_known, rc;
1102
1103 private = (struct dasd_eckd_private *) device->private;
1104 if (private == NULL) {
1105 private = kzalloc(sizeof(struct dasd_eckd_private),
1106 GFP_KERNEL | GFP_DMA);
1107 if (private == NULL) {
1108 dev_warn(&device->cdev->dev,
1109 "Allocating memory for private DASD data "
1110 "failed\n");
1111 return -ENOMEM;
1112 }
1113 device->private = (void *) private;
1114 }
1115 /* Invalidate status of initial analysis. */
1116 private->init_cqr_status = -1;
1117 /* Set default cache operations. */
1118 private->attrib.operation = DASD_NORMAL_CACHE;
1119 private->attrib.nr_cyl = 0;
1120
1121 /* Read Configuration Data */
1122 rc = dasd_eckd_read_conf(device);
1123 if (rc)
1124 goto out_err1;
1125
1126 /* Generate device unique id and register in devmap */
1127 rc = dasd_eckd_generate_uid(device, &private->uid);
1128 if (rc)
1129 goto out_err1;
1130 dasd_set_uid(device->cdev, &private->uid);
1131
1132 if (private->uid.type == UA_BASE_DEVICE) {
1133 block = dasd_alloc_block();
1134 if (IS_ERR(block)) {
1135 DBF_EVENT(DBF_WARNING, "could not allocate dasd "
1136 "block structure for device: %s",
1137 dev_name(&device->cdev->dev));
1138 rc = PTR_ERR(block);
1139 goto out_err1;
1140 }
1141 device->block = block;
1142 block->base = device;
1143 }
1144
1145 /* register lcu with alias handling, enable PAV if this is a new lcu */
1146 is_known = dasd_alias_make_device_known_to_lcu(device);
1147 if (is_known < 0) {
1148 rc = is_known;
1149 goto out_err2;
1150 }
1151 if (!is_known) {
1152 /* new lcu found */
1153 rc = dasd_eckd_validate_server(device); /* will switch pav on */
1154 if (rc)
1155 goto out_err3;
1156 }
1157
1158 /* Read Feature Codes */
1159 rc = dasd_eckd_read_features(device);
1160 if (rc)
1161 goto out_err3;
1162
1163 /* Read Device Characteristics */
1164 rdc_data = (void *) &(private->rdc_data);
1165 memset(rdc_data, 0, sizeof(rdc_data));
1166 rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64);
1167 if (rc) {
1168 DBF_EVENT(DBF_WARNING,
1169 "Read device characteristics failed, rc=%d for "
1170 "device: %s", rc, dev_name(&device->cdev->dev));
1171 goto out_err3;
1172 }
1173 /* find the vaild cylinder size */
1174 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1175 private->rdc_data.long_no_cyl)
1176 private->real_cyl = private->rdc_data.long_no_cyl;
1177 else
1178 private->real_cyl = private->rdc_data.no_cyl;
1179
1180 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1181 "with %d cylinders, %d heads, %d sectors\n",
1182 private->rdc_data.dev_type,
1183 private->rdc_data.dev_model,
1184 private->rdc_data.cu_type,
1185 private->rdc_data.cu_model.model,
1186 private->real_cyl,
1187 private->rdc_data.trk_per_cyl,
1188 private->rdc_data.sec_per_trk);
1189 return 0;
1190
1191 out_err3:
1192 dasd_alias_disconnect_device_from_lcu(device);
1193 out_err2:
1194 dasd_free_block(device->block);
1195 device->block = NULL;
1196 out_err1:
1197 kfree(private->conf_data);
1198 kfree(device->private);
1199 device->private = NULL;
1200 return rc;
1201 }
1202
1203 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1204 {
1205 struct dasd_eckd_private *private;
1206
1207 private = (struct dasd_eckd_private *) device->private;
1208 dasd_alias_disconnect_device_from_lcu(device);
1209 private->ned = NULL;
1210 private->sneq = NULL;
1211 private->vdsneq = NULL;
1212 private->gneq = NULL;
1213 private->conf_len = 0;
1214 kfree(private->conf_data);
1215 private->conf_data = NULL;
1216 }
1217
1218 static struct dasd_ccw_req *
1219 dasd_eckd_analysis_ccw(struct dasd_device *device)
1220 {
1221 struct dasd_eckd_private *private;
1222 struct eckd_count *count_data;
1223 struct LO_eckd_data *LO_data;
1224 struct dasd_ccw_req *cqr;
1225 struct ccw1 *ccw;
1226 int cplength, datasize;
1227 int i;
1228
1229 private = (struct dasd_eckd_private *) device->private;
1230
1231 cplength = 8;
1232 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1233 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1234 cplength, datasize, device);
1235 if (IS_ERR(cqr))
1236 return cqr;
1237 ccw = cqr->cpaddr;
1238 /* Define extent for the first 3 tracks. */
1239 define_extent(ccw++, cqr->data, 0, 2,
1240 DASD_ECKD_CCW_READ_COUNT, device);
1241 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1242 /* Locate record for the first 4 records on track 0. */
1243 ccw[-1].flags |= CCW_FLAG_CC;
1244 locate_record(ccw++, LO_data++, 0, 0, 4,
1245 DASD_ECKD_CCW_READ_COUNT, device, 0);
1246
1247 count_data = private->count_area;
1248 for (i = 0; i < 4; i++) {
1249 ccw[-1].flags |= CCW_FLAG_CC;
1250 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1251 ccw->flags = 0;
1252 ccw->count = 8;
1253 ccw->cda = (__u32)(addr_t) count_data;
1254 ccw++;
1255 count_data++;
1256 }
1257
1258 /* Locate record for the first record on track 2. */
1259 ccw[-1].flags |= CCW_FLAG_CC;
1260 locate_record(ccw++, LO_data++, 2, 0, 1,
1261 DASD_ECKD_CCW_READ_COUNT, device, 0);
1262 /* Read count ccw. */
1263 ccw[-1].flags |= CCW_FLAG_CC;
1264 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1265 ccw->flags = 0;
1266 ccw->count = 8;
1267 ccw->cda = (__u32)(addr_t) count_data;
1268
1269 cqr->block = NULL;
1270 cqr->startdev = device;
1271 cqr->memdev = device;
1272 cqr->retries = 0;
1273 cqr->buildclk = get_clock();
1274 cqr->status = DASD_CQR_FILLED;
1275 return cqr;
1276 }
1277
1278 /*
1279 * This is the callback function for the init_analysis cqr. It saves
1280 * the status of the initial analysis ccw before it frees it and kicks
1281 * the device to continue the startup sequence. This will call
1282 * dasd_eckd_do_analysis again (if the devices has not been marked
1283 * for deletion in the meantime).
1284 */
1285 static void
1286 dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data)
1287 {
1288 struct dasd_eckd_private *private;
1289 struct dasd_device *device;
1290
1291 device = init_cqr->startdev;
1292 private = (struct dasd_eckd_private *) device->private;
1293 private->init_cqr_status = init_cqr->status;
1294 dasd_sfree_request(init_cqr, device);
1295 dasd_kick_device(device);
1296 }
1297
1298 static int
1299 dasd_eckd_start_analysis(struct dasd_block *block)
1300 {
1301 struct dasd_eckd_private *private;
1302 struct dasd_ccw_req *init_cqr;
1303
1304 private = (struct dasd_eckd_private *) block->base->private;
1305 init_cqr = dasd_eckd_analysis_ccw(block->base);
1306 if (IS_ERR(init_cqr))
1307 return PTR_ERR(init_cqr);
1308 init_cqr->callback = dasd_eckd_analysis_callback;
1309 init_cqr->callback_data = NULL;
1310 init_cqr->expires = 5*HZ;
1311 dasd_add_request_head(init_cqr);
1312 return -EAGAIN;
1313 }
1314
1315 static int
1316 dasd_eckd_end_analysis(struct dasd_block *block)
1317 {
1318 struct dasd_device *device;
1319 struct dasd_eckd_private *private;
1320 struct eckd_count *count_area;
1321 unsigned int sb, blk_per_trk;
1322 int status, i;
1323
1324 device = block->base;
1325 private = (struct dasd_eckd_private *) device->private;
1326 status = private->init_cqr_status;
1327 private->init_cqr_status = -1;
1328 if (status != DASD_CQR_DONE) {
1329 dev_warn(&device->cdev->dev,
1330 "The DASD is not formatted\n");
1331 return -EMEDIUMTYPE;
1332 }
1333
1334 private->uses_cdl = 1;
1335 /* Check Track 0 for Compatible Disk Layout */
1336 count_area = NULL;
1337 for (i = 0; i < 3; i++) {
1338 if (private->count_area[i].kl != 4 ||
1339 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1340 private->uses_cdl = 0;
1341 break;
1342 }
1343 }
1344 if (i == 3)
1345 count_area = &private->count_area[4];
1346
1347 if (private->uses_cdl == 0) {
1348 for (i = 0; i < 5; i++) {
1349 if ((private->count_area[i].kl != 0) ||
1350 (private->count_area[i].dl !=
1351 private->count_area[0].dl))
1352 break;
1353 }
1354 if (i == 5)
1355 count_area = &private->count_area[0];
1356 } else {
1357 if (private->count_area[3].record == 1)
1358 dev_warn(&device->cdev->dev,
1359 "Track 0 has no records following the VTOC\n");
1360 }
1361 if (count_area != NULL && count_area->kl == 0) {
1362 /* we found notthing violating our disk layout */
1363 if (dasd_check_blocksize(count_area->dl) == 0)
1364 block->bp_block = count_area->dl;
1365 }
1366 if (block->bp_block == 0) {
1367 dev_warn(&device->cdev->dev,
1368 "The disk layout of the DASD is not supported\n");
1369 return -EMEDIUMTYPE;
1370 }
1371 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1372 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1373 block->s2b_shift++;
1374
1375 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
1376 block->blocks = (private->real_cyl *
1377 private->rdc_data.trk_per_cyl *
1378 blk_per_trk);
1379
1380 dev_info(&device->cdev->dev,
1381 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1382 "%s\n", (block->bp_block >> 10),
1383 ((private->real_cyl *
1384 private->rdc_data.trk_per_cyl *
1385 blk_per_trk * (block->bp_block >> 9)) >> 1),
1386 ((blk_per_trk * block->bp_block) >> 10),
1387 private->uses_cdl ?
1388 "compatible disk layout" : "linux disk layout");
1389
1390 return 0;
1391 }
1392
1393 static int dasd_eckd_do_analysis(struct dasd_block *block)
1394 {
1395 struct dasd_eckd_private *private;
1396
1397 private = (struct dasd_eckd_private *) block->base->private;
1398 if (private->init_cqr_status < 0)
1399 return dasd_eckd_start_analysis(block);
1400 else
1401 return dasd_eckd_end_analysis(block);
1402 }
1403
1404 static int dasd_eckd_ready_to_online(struct dasd_device *device)
1405 {
1406 return dasd_alias_add_device(device);
1407 };
1408
1409 static int dasd_eckd_online_to_ready(struct dasd_device *device)
1410 {
1411 return dasd_alias_remove_device(device);
1412 };
1413
1414 static int
1415 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1416 {
1417 struct dasd_eckd_private *private;
1418
1419 private = (struct dasd_eckd_private *) block->base->private;
1420 if (dasd_check_blocksize(block->bp_block) == 0) {
1421 geo->sectors = recs_per_track(&private->rdc_data,
1422 0, block->bp_block);
1423 }
1424 geo->cylinders = private->rdc_data.no_cyl;
1425 geo->heads = private->rdc_data.trk_per_cyl;
1426 return 0;
1427 }
1428
1429 static struct dasd_ccw_req *
1430 dasd_eckd_format_device(struct dasd_device * device,
1431 struct format_data_t * fdata)
1432 {
1433 struct dasd_eckd_private *private;
1434 struct dasd_ccw_req *fcp;
1435 struct eckd_count *ect;
1436 struct ccw1 *ccw;
1437 void *data;
1438 int rpt;
1439 struct ch_t address;
1440 int cplength, datasize;
1441 int i;
1442 int intensity = 0;
1443 int r0_perm;
1444
1445 private = (struct dasd_eckd_private *) device->private;
1446 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
1447 set_ch_t(&address,
1448 fdata->start_unit / private->rdc_data.trk_per_cyl,
1449 fdata->start_unit % private->rdc_data.trk_per_cyl);
1450
1451 /* Sanity checks. */
1452 if (fdata->start_unit >=
1453 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
1454 dev_warn(&device->cdev->dev, "Start track number %d used in "
1455 "formatting is too big\n", fdata->start_unit);
1456 return ERR_PTR(-EINVAL);
1457 }
1458 if (fdata->start_unit > fdata->stop_unit) {
1459 dev_warn(&device->cdev->dev, "Start track %d used in "
1460 "formatting exceeds end track\n", fdata->start_unit);
1461 return ERR_PTR(-EINVAL);
1462 }
1463 if (dasd_check_blocksize(fdata->blksize) != 0) {
1464 dev_warn(&device->cdev->dev,
1465 "The DASD cannot be formatted with block size %d\n",
1466 fdata->blksize);
1467 return ERR_PTR(-EINVAL);
1468 }
1469
1470 /*
1471 * fdata->intensity is a bit string that tells us what to do:
1472 * Bit 0: write record zero
1473 * Bit 1: write home address, currently not supported
1474 * Bit 2: invalidate tracks
1475 * Bit 3: use OS/390 compatible disk layout (cdl)
1476 * Bit 4: do not allow storage subsystem to modify record zero
1477 * Only some bit combinations do make sense.
1478 */
1479 if (fdata->intensity & 0x10) {
1480 r0_perm = 0;
1481 intensity = fdata->intensity & ~0x10;
1482 } else {
1483 r0_perm = 1;
1484 intensity = fdata->intensity;
1485 }
1486 switch (intensity) {
1487 case 0x00: /* Normal format */
1488 case 0x08: /* Normal format, use cdl. */
1489 cplength = 2 + rpt;
1490 datasize = sizeof(struct DE_eckd_data) +
1491 sizeof(struct LO_eckd_data) +
1492 rpt * sizeof(struct eckd_count);
1493 break;
1494 case 0x01: /* Write record zero and format track. */
1495 case 0x09: /* Write record zero and format track, use cdl. */
1496 cplength = 3 + rpt;
1497 datasize = sizeof(struct DE_eckd_data) +
1498 sizeof(struct LO_eckd_data) +
1499 sizeof(struct eckd_count) +
1500 rpt * sizeof(struct eckd_count);
1501 break;
1502 case 0x04: /* Invalidate track. */
1503 case 0x0c: /* Invalidate track, use cdl. */
1504 cplength = 3;
1505 datasize = sizeof(struct DE_eckd_data) +
1506 sizeof(struct LO_eckd_data) +
1507 sizeof(struct eckd_count);
1508 break;
1509 default:
1510 dev_warn(&device->cdev->dev, "An I/O control call used "
1511 "incorrect flags 0x%x\n", fdata->intensity);
1512 return ERR_PTR(-EINVAL);
1513 }
1514 /* Allocate the format ccw request. */
1515 fcp = dasd_smalloc_request(dasd_eckd_discipline.name,
1516 cplength, datasize, device);
1517 if (IS_ERR(fcp))
1518 return fcp;
1519
1520 data = fcp->data;
1521 ccw = fcp->cpaddr;
1522
1523 switch (intensity & ~0x08) {
1524 case 0x00: /* Normal format. */
1525 define_extent(ccw++, (struct DE_eckd_data *) data,
1526 fdata->start_unit, fdata->start_unit,
1527 DASD_ECKD_CCW_WRITE_CKD, device);
1528 /* grant subsystem permission to format R0 */
1529 if (r0_perm)
1530 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1531 data += sizeof(struct DE_eckd_data);
1532 ccw[-1].flags |= CCW_FLAG_CC;
1533 locate_record(ccw++, (struct LO_eckd_data *) data,
1534 fdata->start_unit, 0, rpt,
1535 DASD_ECKD_CCW_WRITE_CKD, device,
1536 fdata->blksize);
1537 data += sizeof(struct LO_eckd_data);
1538 break;
1539 case 0x01: /* Write record zero + format track. */
1540 define_extent(ccw++, (struct DE_eckd_data *) data,
1541 fdata->start_unit, fdata->start_unit,
1542 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1543 device);
1544 data += sizeof(struct DE_eckd_data);
1545 ccw[-1].flags |= CCW_FLAG_CC;
1546 locate_record(ccw++, (struct LO_eckd_data *) data,
1547 fdata->start_unit, 0, rpt + 1,
1548 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
1549 device->block->bp_block);
1550 data += sizeof(struct LO_eckd_data);
1551 break;
1552 case 0x04: /* Invalidate track. */
1553 define_extent(ccw++, (struct DE_eckd_data *) data,
1554 fdata->start_unit, fdata->start_unit,
1555 DASD_ECKD_CCW_WRITE_CKD, device);
1556 data += sizeof(struct DE_eckd_data);
1557 ccw[-1].flags |= CCW_FLAG_CC;
1558 locate_record(ccw++, (struct LO_eckd_data *) data,
1559 fdata->start_unit, 0, 1,
1560 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1561 data += sizeof(struct LO_eckd_data);
1562 break;
1563 }
1564 if (intensity & 0x01) { /* write record zero */
1565 ect = (struct eckd_count *) data;
1566 data += sizeof(struct eckd_count);
1567 ect->cyl = address.cyl;
1568 ect->head = address.head;
1569 ect->record = 0;
1570 ect->kl = 0;
1571 ect->dl = 8;
1572 ccw[-1].flags |= CCW_FLAG_CC;
1573 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1574 ccw->flags = CCW_FLAG_SLI;
1575 ccw->count = 8;
1576 ccw->cda = (__u32)(addr_t) ect;
1577 ccw++;
1578 }
1579 if ((intensity & ~0x08) & 0x04) { /* erase track */
1580 ect = (struct eckd_count *) data;
1581 data += sizeof(struct eckd_count);
1582 ect->cyl = address.cyl;
1583 ect->head = address.head;
1584 ect->record = 1;
1585 ect->kl = 0;
1586 ect->dl = 0;
1587 ccw[-1].flags |= CCW_FLAG_CC;
1588 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1589 ccw->flags = CCW_FLAG_SLI;
1590 ccw->count = 8;
1591 ccw->cda = (__u32)(addr_t) ect;
1592 } else { /* write remaining records */
1593 for (i = 0; i < rpt; i++) {
1594 ect = (struct eckd_count *) data;
1595 data += sizeof(struct eckd_count);
1596 ect->cyl = address.cyl;
1597 ect->head = address.head;
1598 ect->record = i + 1;
1599 ect->kl = 0;
1600 ect->dl = fdata->blksize;
1601 /* Check for special tracks 0-1 when formatting CDL */
1602 if ((intensity & 0x08) &&
1603 fdata->start_unit == 0) {
1604 if (i < 3) {
1605 ect->kl = 4;
1606 ect->dl = sizes_trk0[i] - 4;
1607 }
1608 }
1609 if ((intensity & 0x08) &&
1610 fdata->start_unit == 1) {
1611 ect->kl = 44;
1612 ect->dl = LABEL_SIZE - 44;
1613 }
1614 ccw[-1].flags |= CCW_FLAG_CC;
1615 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1616 ccw->flags = CCW_FLAG_SLI;
1617 ccw->count = 8;
1618 ccw->cda = (__u32)(addr_t) ect;
1619 ccw++;
1620 }
1621 }
1622 fcp->startdev = device;
1623 fcp->memdev = device;
1624 clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags);
1625 fcp->retries = 5; /* set retry counter to enable default ERP */
1626 fcp->buildclk = get_clock();
1627 fcp->status = DASD_CQR_FILLED;
1628 return fcp;
1629 }
1630
1631 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1632 {
1633 cqr->status = DASD_CQR_FILLED;
1634 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1635 dasd_eckd_reset_ccw_to_base_io(cqr);
1636 cqr->startdev = cqr->block->base;
1637 }
1638 };
1639
1640 static dasd_erp_fn_t
1641 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1642 {
1643 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1644 struct ccw_device *cdev = device->cdev;
1645
1646 switch (cdev->id.cu_type) {
1647 case 0x3990:
1648 case 0x2105:
1649 case 0x2107:
1650 case 0x1750:
1651 return dasd_3990_erp_action;
1652 case 0x9343:
1653 case 0x3880:
1654 default:
1655 return dasd_default_erp_action;
1656 }
1657 }
1658
1659 static dasd_erp_fn_t
1660 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1661 {
1662 return dasd_default_erp_postaction;
1663 }
1664
1665
1666 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1667 struct irb *irb)
1668 {
1669 char mask;
1670 char *sense = NULL;
1671
1672 /* first of all check for state change pending interrupt */
1673 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
1674 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
1675 dasd_generic_handle_state_change(device);
1676 return;
1677 }
1678
1679 /* summary unit check */
1680 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
1681 (irb->ecw[7] == 0x0D)) {
1682 dasd_alias_handle_summary_unit_check(device, irb);
1683 return;
1684 }
1685
1686 sense = dasd_get_sense(irb);
1687 /* service information message SIM */
1688 if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1689 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1690 dasd_3990_erp_handle_sim(device, sense);
1691 dasd_schedule_device_bh(device);
1692 return;
1693 }
1694
1695 if ((scsw_cc(&irb->scsw) == 1) &&
1696 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1697 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1698 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
1699 /* fake irb do nothing, they are handled elsewhere */
1700 dasd_schedule_device_bh(device);
1701 return;
1702 }
1703
1704 if (!sense) {
1705 /* just report other unsolicited interrupts */
1706 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1707 "unsolicited interrupt received");
1708 } else {
1709 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1710 "unsolicited interrupt received "
1711 "(sense available)");
1712 device->discipline->dump_sense_dbf(device, NULL, irb,
1713 "unsolicited");
1714 }
1715
1716 dasd_schedule_device_bh(device);
1717 return;
1718 };
1719
1720
1721 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1722 struct dasd_device *startdev,
1723 struct dasd_block *block,
1724 struct request *req,
1725 sector_t first_rec,
1726 sector_t last_rec,
1727 sector_t first_trk,
1728 sector_t last_trk,
1729 unsigned int first_offs,
1730 unsigned int last_offs,
1731 unsigned int blk_per_trk,
1732 unsigned int blksize)
1733 {
1734 struct dasd_eckd_private *private;
1735 unsigned long *idaws;
1736 struct LO_eckd_data *LO_data;
1737 struct dasd_ccw_req *cqr;
1738 struct ccw1 *ccw;
1739 struct req_iterator iter;
1740 struct bio_vec *bv;
1741 char *dst;
1742 unsigned int off;
1743 int count, cidaw, cplength, datasize;
1744 sector_t recid;
1745 unsigned char cmd, rcmd;
1746 int use_prefix;
1747 struct dasd_device *basedev;
1748
1749 basedev = block->base;
1750 private = (struct dasd_eckd_private *) basedev->private;
1751 if (rq_data_dir(req) == READ)
1752 cmd = DASD_ECKD_CCW_READ_MT;
1753 else if (rq_data_dir(req) == WRITE)
1754 cmd = DASD_ECKD_CCW_WRITE_MT;
1755 else
1756 return ERR_PTR(-EINVAL);
1757
1758 /* Check struct bio and count the number of blocks for the request. */
1759 count = 0;
1760 cidaw = 0;
1761 rq_for_each_segment(bv, req, iter) {
1762 if (bv->bv_len & (blksize - 1))
1763 /* Eckd can only do full blocks. */
1764 return ERR_PTR(-EINVAL);
1765 count += bv->bv_len >> (block->s2b_shift + 9);
1766 #if defined(CONFIG_64BIT)
1767 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
1768 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1769 #endif
1770 }
1771 /* Paranoia. */
1772 if (count != last_rec - first_rec + 1)
1773 return ERR_PTR(-EINVAL);
1774
1775 /* use the prefix command if available */
1776 use_prefix = private->features.feature[8] & 0x01;
1777 if (use_prefix) {
1778 /* 1x prefix + number of blocks */
1779 cplength = 2 + count;
1780 /* 1x prefix + cidaws*sizeof(long) */
1781 datasize = sizeof(struct PFX_eckd_data) +
1782 sizeof(struct LO_eckd_data) +
1783 cidaw * sizeof(unsigned long);
1784 } else {
1785 /* 1x define extent + 1x locate record + number of blocks */
1786 cplength = 2 + count;
1787 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1788 datasize = sizeof(struct DE_eckd_data) +
1789 sizeof(struct LO_eckd_data) +
1790 cidaw * sizeof(unsigned long);
1791 }
1792 /* Find out the number of additional locate record ccws for cdl. */
1793 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1794 if (last_rec >= 2*blk_per_trk)
1795 count = 2*blk_per_trk - first_rec;
1796 cplength += count;
1797 datasize += count*sizeof(struct LO_eckd_data);
1798 }
1799 /* Allocate the ccw request. */
1800 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1801 cplength, datasize, startdev);
1802 if (IS_ERR(cqr))
1803 return cqr;
1804 ccw = cqr->cpaddr;
1805 /* First ccw is define extent or prefix. */
1806 if (use_prefix) {
1807 if (prefix(ccw++, cqr->data, first_trk,
1808 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1809 /* Clock not in sync and XRC is enabled.
1810 * Try again later.
1811 */
1812 dasd_sfree_request(cqr, startdev);
1813 return ERR_PTR(-EAGAIN);
1814 }
1815 idaws = (unsigned long *) (cqr->data +
1816 sizeof(struct PFX_eckd_data));
1817 } else {
1818 if (define_extent(ccw++, cqr->data, first_trk,
1819 last_trk, cmd, startdev) == -EAGAIN) {
1820 /* Clock not in sync and XRC is enabled.
1821 * Try again later.
1822 */
1823 dasd_sfree_request(cqr, startdev);
1824 return ERR_PTR(-EAGAIN);
1825 }
1826 idaws = (unsigned long *) (cqr->data +
1827 sizeof(struct DE_eckd_data));
1828 }
1829 /* Build locate_record+read/write/ccws. */
1830 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1831 recid = first_rec;
1832 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1833 /* Only standard blocks so there is just one locate record. */
1834 ccw[-1].flags |= CCW_FLAG_CC;
1835 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1836 last_rec - recid + 1, cmd, basedev, blksize);
1837 }
1838 rq_for_each_segment(bv, req, iter) {
1839 dst = page_address(bv->bv_page) + bv->bv_offset;
1840 if (dasd_page_cache) {
1841 char *copy = kmem_cache_alloc(dasd_page_cache,
1842 GFP_DMA | __GFP_NOWARN);
1843 if (copy && rq_data_dir(req) == WRITE)
1844 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1845 if (copy)
1846 dst = copy + bv->bv_offset;
1847 }
1848 for (off = 0; off < bv->bv_len; off += blksize) {
1849 sector_t trkid = recid;
1850 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1851 rcmd = cmd;
1852 count = blksize;
1853 /* Locate record for cdl special block ? */
1854 if (private->uses_cdl && recid < 2*blk_per_trk) {
1855 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1856 rcmd |= 0x8;
1857 count = dasd_eckd_cdl_reclen(recid);
1858 if (count < blksize &&
1859 rq_data_dir(req) == READ)
1860 memset(dst + count, 0xe5,
1861 blksize - count);
1862 }
1863 ccw[-1].flags |= CCW_FLAG_CC;
1864 locate_record(ccw++, LO_data++,
1865 trkid, recoffs + 1,
1866 1, rcmd, basedev, count);
1867 }
1868 /* Locate record for standard blocks ? */
1869 if (private->uses_cdl && recid == 2*blk_per_trk) {
1870 ccw[-1].flags |= CCW_FLAG_CC;
1871 locate_record(ccw++, LO_data++,
1872 trkid, recoffs + 1,
1873 last_rec - recid + 1,
1874 cmd, basedev, count);
1875 }
1876 /* Read/write ccw. */
1877 ccw[-1].flags |= CCW_FLAG_CC;
1878 ccw->cmd_code = rcmd;
1879 ccw->count = count;
1880 if (idal_is_needed(dst, blksize)) {
1881 ccw->cda = (__u32)(addr_t) idaws;
1882 ccw->flags = CCW_FLAG_IDA;
1883 idaws = idal_create_words(idaws, dst, blksize);
1884 } else {
1885 ccw->cda = (__u32)(addr_t) dst;
1886 ccw->flags = 0;
1887 }
1888 ccw++;
1889 dst += blksize;
1890 recid++;
1891 }
1892 }
1893 if (blk_noretry_request(req) ||
1894 block->base->features & DASD_FEATURE_FAILFAST)
1895 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1896 cqr->startdev = startdev;
1897 cqr->memdev = startdev;
1898 cqr->block = block;
1899 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1900 cqr->lpm = private->path_data.ppm;
1901 cqr->retries = 256;
1902 cqr->buildclk = get_clock();
1903 cqr->status = DASD_CQR_FILLED;
1904 return cqr;
1905 }
1906
1907 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1908 struct dasd_device *startdev,
1909 struct dasd_block *block,
1910 struct request *req,
1911 sector_t first_rec,
1912 sector_t last_rec,
1913 sector_t first_trk,
1914 sector_t last_trk,
1915 unsigned int first_offs,
1916 unsigned int last_offs,
1917 unsigned int blk_per_trk,
1918 unsigned int blksize)
1919 {
1920 struct dasd_eckd_private *private;
1921 unsigned long *idaws;
1922 struct dasd_ccw_req *cqr;
1923 struct ccw1 *ccw;
1924 struct req_iterator iter;
1925 struct bio_vec *bv;
1926 char *dst, *idaw_dst;
1927 unsigned int cidaw, cplength, datasize;
1928 unsigned int tlf;
1929 sector_t recid;
1930 unsigned char cmd;
1931 struct dasd_device *basedev;
1932 unsigned int trkcount, count, count_to_trk_end;
1933 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
1934 unsigned char new_track, end_idaw;
1935 sector_t trkid;
1936 unsigned int recoffs;
1937
1938 basedev = block->base;
1939 private = (struct dasd_eckd_private *) basedev->private;
1940 if (rq_data_dir(req) == READ)
1941 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
1942 else if (rq_data_dir(req) == WRITE)
1943 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
1944 else
1945 return ERR_PTR(-EINVAL);
1946
1947 /* Track based I/O needs IDAWs for each page, and not just for
1948 * 64 bit addresses. We need additional idals for pages
1949 * that get filled from two tracks, so we use the number
1950 * of records as upper limit.
1951 */
1952 cidaw = last_rec - first_rec + 1;
1953 trkcount = last_trk - first_trk + 1;
1954
1955 /* 1x prefix + one read/write ccw per track */
1956 cplength = 1 + trkcount;
1957
1958 /* on 31-bit we need space for two 32 bit addresses per page
1959 * on 64-bit one 64 bit address
1960 */
1961 datasize = sizeof(struct PFX_eckd_data) +
1962 cidaw * sizeof(unsigned long long);
1963
1964 /* Allocate the ccw request. */
1965 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1966 cplength, datasize, startdev);
1967 if (IS_ERR(cqr))
1968 return cqr;
1969 ccw = cqr->cpaddr;
1970 /* transfer length factor: how many bytes to read from the last track */
1971 if (first_trk == last_trk)
1972 tlf = last_offs - first_offs + 1;
1973 else
1974 tlf = last_offs + 1;
1975 tlf *= blksize;
1976
1977 if (prefix_LRE(ccw++, cqr->data, first_trk,
1978 last_trk, cmd, basedev, startdev,
1979 1 /* format */, first_offs + 1,
1980 trkcount, blksize,
1981 tlf) == -EAGAIN) {
1982 /* Clock not in sync and XRC is enabled.
1983 * Try again later.
1984 */
1985 dasd_sfree_request(cqr, startdev);
1986 return ERR_PTR(-EAGAIN);
1987 }
1988
1989 /*
1990 * The translation of request into ccw programs must meet the
1991 * following conditions:
1992 * - all idaws but the first and the last must address full pages
1993 * (or 2K blocks on 31-bit)
1994 * - the scope of a ccw and it's idal ends with the track boundaries
1995 */
1996 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
1997 recid = first_rec;
1998 new_track = 1;
1999 end_idaw = 0;
2000 len_to_track_end = 0;
2001 idaw_dst = 0;
2002 idaw_len = 0;
2003 rq_for_each_segment(bv, req, iter) {
2004 dst = page_address(bv->bv_page) + bv->bv_offset;
2005 seg_len = bv->bv_len;
2006 while (seg_len) {
2007 if (new_track) {
2008 trkid = recid;
2009 recoffs = sector_div(trkid, blk_per_trk);
2010 count_to_trk_end = blk_per_trk - recoffs;
2011 count = min((last_rec - recid + 1),
2012 (sector_t)count_to_trk_end);
2013 len_to_track_end = count * blksize;
2014 ccw[-1].flags |= CCW_FLAG_CC;
2015 ccw->cmd_code = cmd;
2016 ccw->count = len_to_track_end;
2017 ccw->cda = (__u32)(addr_t)idaws;
2018 ccw->flags = CCW_FLAG_IDA;
2019 ccw++;
2020 recid += count;
2021 new_track = 0;
2022 }
2023 /* If we start a new idaw, everything is fine and the
2024 * start of the new idaw is the start of this segment.
2025 * If we continue an idaw, we must make sure that the
2026 * current segment begins where the so far accumulated
2027 * idaw ends
2028 */
2029 if (!idaw_dst)
2030 idaw_dst = dst;
2031 if ((idaw_dst + idaw_len) != dst) {
2032 dasd_sfree_request(cqr, startdev);
2033 return ERR_PTR(-ERANGE);
2034 }
2035 part_len = min(seg_len, len_to_track_end);
2036 seg_len -= part_len;
2037 dst += part_len;
2038 idaw_len += part_len;
2039 len_to_track_end -= part_len;
2040 /* collected memory area ends on an IDA_BLOCK border,
2041 * -> create an idaw
2042 * idal_create_words will handle cases where idaw_len
2043 * is larger then IDA_BLOCK_SIZE
2044 */
2045 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2046 end_idaw = 1;
2047 /* We also need to end the idaw at track end */
2048 if (!len_to_track_end) {
2049 new_track = 1;
2050 end_idaw = 1;
2051 }
2052 if (end_idaw) {
2053 idaws = idal_create_words(idaws, idaw_dst,
2054 idaw_len);
2055 idaw_dst = 0;
2056 idaw_len = 0;
2057 end_idaw = 0;
2058 }
2059 }
2060 }
2061
2062 if (blk_noretry_request(req) ||
2063 block->base->features & DASD_FEATURE_FAILFAST)
2064 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2065 cqr->startdev = startdev;
2066 cqr->memdev = startdev;
2067 cqr->block = block;
2068 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2069 cqr->lpm = private->path_data.ppm;
2070 cqr->retries = 256;
2071 cqr->buildclk = get_clock();
2072 cqr->status = DASD_CQR_FILLED;
2073 return cqr;
2074 }
2075
2076 static int prepare_itcw(struct itcw *itcw,
2077 unsigned int trk, unsigned int totrk, int cmd,
2078 struct dasd_device *basedev,
2079 struct dasd_device *startdev,
2080 unsigned int rec_on_trk, int count,
2081 unsigned int blksize,
2082 unsigned int total_data_size,
2083 unsigned int tlf,
2084 unsigned int blk_per_trk)
2085 {
2086 struct PFX_eckd_data pfxdata;
2087 struct dasd_eckd_private *basepriv, *startpriv;
2088 struct DE_eckd_data *dedata;
2089 struct LRE_eckd_data *lredata;
2090 struct dcw *dcw;
2091
2092 u32 begcyl, endcyl;
2093 u16 heads, beghead, endhead;
2094 u8 pfx_cmd;
2095
2096 int rc = 0;
2097 int sector = 0;
2098 int dn, d;
2099
2100
2101 /* setup prefix data */
2102 basepriv = (struct dasd_eckd_private *) basedev->private;
2103 startpriv = (struct dasd_eckd_private *) startdev->private;
2104 dedata = &pfxdata.define_extent;
2105 lredata = &pfxdata.locate_record;
2106
2107 memset(&pfxdata, 0, sizeof(pfxdata));
2108 pfxdata.format = 1; /* PFX with LRE */
2109 pfxdata.base_address = basepriv->ned->unit_addr;
2110 pfxdata.base_lss = basepriv->ned->ID;
2111 pfxdata.validity.define_extent = 1;
2112
2113 /* private uid is kept up to date, conf_data may be outdated */
2114 if (startpriv->uid.type != UA_BASE_DEVICE) {
2115 pfxdata.validity.verify_base = 1;
2116 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2117 pfxdata.validity.hyper_pav = 1;
2118 }
2119
2120 switch (cmd) {
2121 case DASD_ECKD_CCW_READ_TRACK_DATA:
2122 dedata->mask.perm = 0x1;
2123 dedata->attributes.operation = basepriv->attrib.operation;
2124 dedata->blk_size = blksize;
2125 dedata->ga_extended |= 0x42;
2126 lredata->operation.orientation = 0x0;
2127 lredata->operation.operation = 0x0C;
2128 lredata->auxiliary.check_bytes = 0x01;
2129 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2130 break;
2131 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2132 dedata->mask.perm = 0x02;
2133 dedata->attributes.operation = basepriv->attrib.operation;
2134 dedata->blk_size = blksize;
2135 rc = check_XRC_on_prefix(&pfxdata, basedev);
2136 dedata->ga_extended |= 0x42;
2137 lredata->operation.orientation = 0x0;
2138 lredata->operation.operation = 0x3F;
2139 lredata->extended_operation = 0x23;
2140 lredata->auxiliary.check_bytes = 0x2;
2141 pfx_cmd = DASD_ECKD_CCW_PFX;
2142 break;
2143 default:
2144 DBF_DEV_EVENT(DBF_ERR, basedev,
2145 "prepare itcw, unknown opcode 0x%x", cmd);
2146 BUG();
2147 break;
2148 }
2149 if (rc)
2150 return rc;
2151
2152 dedata->attributes.mode = 0x3; /* ECKD */
2153
2154 heads = basepriv->rdc_data.trk_per_cyl;
2155 begcyl = trk / heads;
2156 beghead = trk % heads;
2157 endcyl = totrk / heads;
2158 endhead = totrk % heads;
2159
2160 /* check for sequential prestage - enhance cylinder range */
2161 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2162 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2163
2164 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2165 endcyl += basepriv->attrib.nr_cyl;
2166 else
2167 endcyl = (basepriv->real_cyl - 1);
2168 }
2169
2170 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2171 set_ch_t(&dedata->end_ext, endcyl, endhead);
2172
2173 dedata->ep_format = 0x20; /* records per track is valid */
2174 dedata->ep_rec_per_track = blk_per_trk;
2175
2176 if (rec_on_trk) {
2177 switch (basepriv->rdc_data.dev_type) {
2178 case 0x3390:
2179 dn = ceil_quot(blksize + 6, 232);
2180 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2181 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2182 break;
2183 case 0x3380:
2184 d = 7 + ceil_quot(blksize + 12, 32);
2185 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2186 break;
2187 }
2188 }
2189
2190 lredata->auxiliary.length_valid = 1;
2191 lredata->auxiliary.length_scope = 1;
2192 lredata->auxiliary.imbedded_ccw_valid = 1;
2193 lredata->length = tlf;
2194 lredata->imbedded_ccw = cmd;
2195 lredata->count = count;
2196 lredata->sector = sector;
2197 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2198 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2199 lredata->search_arg.head = lredata->seek_addr.head;
2200 lredata->search_arg.record = rec_on_trk;
2201
2202 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2203 &pfxdata, sizeof(pfxdata), total_data_size);
2204
2205 return rc;
2206 }
2207
2208 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2209 struct dasd_device *startdev,
2210 struct dasd_block *block,
2211 struct request *req,
2212 sector_t first_rec,
2213 sector_t last_rec,
2214 sector_t first_trk,
2215 sector_t last_trk,
2216 unsigned int first_offs,
2217 unsigned int last_offs,
2218 unsigned int blk_per_trk,
2219 unsigned int blksize)
2220 {
2221 struct dasd_eckd_private *private;
2222 struct dasd_ccw_req *cqr;
2223 struct req_iterator iter;
2224 struct bio_vec *bv;
2225 char *dst;
2226 unsigned int trkcount, ctidaw;
2227 unsigned char cmd;
2228 struct dasd_device *basedev;
2229 unsigned int tlf;
2230 struct itcw *itcw;
2231 struct tidaw *last_tidaw = NULL;
2232 int itcw_op;
2233 size_t itcw_size;
2234
2235 basedev = block->base;
2236 private = (struct dasd_eckd_private *) basedev->private;
2237 if (rq_data_dir(req) == READ) {
2238 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2239 itcw_op = ITCW_OP_READ;
2240 } else if (rq_data_dir(req) == WRITE) {
2241 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2242 itcw_op = ITCW_OP_WRITE;
2243 } else
2244 return ERR_PTR(-EINVAL);
2245
2246 /* trackbased I/O needs address all memory via TIDAWs,
2247 * not just for 64 bit addresses. This allows us to map
2248 * each segment directly to one tidaw.
2249 */
2250 trkcount = last_trk - first_trk + 1;
2251 ctidaw = 0;
2252 rq_for_each_segment(bv, req, iter) {
2253 ++ctidaw;
2254 }
2255
2256 /* Allocate the ccw request. */
2257 itcw_size = itcw_calc_size(0, ctidaw, 0);
2258 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2259 0, itcw_size, startdev);
2260 if (IS_ERR(cqr))
2261 return cqr;
2262
2263 cqr->cpmode = 1;
2264 cqr->startdev = startdev;
2265 cqr->memdev = startdev;
2266 cqr->block = block;
2267 cqr->expires = 100*HZ;
2268 cqr->buildclk = get_clock();
2269 cqr->status = DASD_CQR_FILLED;
2270 cqr->retries = 10;
2271
2272 /* transfer length factor: how many bytes to read from the last track */
2273 if (first_trk == last_trk)
2274 tlf = last_offs - first_offs + 1;
2275 else
2276 tlf = last_offs + 1;
2277 tlf *= blksize;
2278
2279 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2280 cqr->cpaddr = itcw_get_tcw(itcw);
2281
2282 if (prepare_itcw(itcw, first_trk, last_trk,
2283 cmd, basedev, startdev,
2284 first_offs + 1,
2285 trkcount, blksize,
2286 (last_rec - first_rec + 1) * blksize,
2287 tlf, blk_per_trk) == -EAGAIN) {
2288 /* Clock not in sync and XRC is enabled.
2289 * Try again later.
2290 */
2291 dasd_sfree_request(cqr, startdev);
2292 return ERR_PTR(-EAGAIN);
2293 }
2294
2295 /*
2296 * A tidaw can address 4k of memory, but must not cross page boundaries
2297 * We can let the block layer handle this by setting
2298 * blk_queue_segment_boundary to page boundaries and
2299 * blk_max_segment_size to page size when setting up the request queue.
2300 */
2301 rq_for_each_segment(bv, req, iter) {
2302 dst = page_address(bv->bv_page) + bv->bv_offset;
2303 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2304 if (IS_ERR(last_tidaw))
2305 return (struct dasd_ccw_req *)last_tidaw;
2306 }
2307
2308 last_tidaw->flags |= 0x80;
2309 itcw_finalize(itcw);
2310
2311 if (blk_noretry_request(req) ||
2312 block->base->features & DASD_FEATURE_FAILFAST)
2313 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2314 cqr->startdev = startdev;
2315 cqr->memdev = startdev;
2316 cqr->block = block;
2317 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2318 cqr->lpm = private->path_data.ppm;
2319 cqr->retries = 256;
2320 cqr->buildclk = get_clock();
2321 cqr->status = DASD_CQR_FILLED;
2322 return cqr;
2323 }
2324
2325 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2326 struct dasd_block *block,
2327 struct request *req)
2328 {
2329 int tpm, cmdrtd, cmdwtd;
2330 int use_prefix;
2331
2332 struct dasd_eckd_private *private;
2333 int fcx_in_css, fcx_in_gneq, fcx_in_features;
2334 struct dasd_device *basedev;
2335 sector_t first_rec, last_rec;
2336 sector_t first_trk, last_trk;
2337 unsigned int first_offs, last_offs;
2338 unsigned int blk_per_trk, blksize;
2339 int cdlspecial;
2340 struct dasd_ccw_req *cqr;
2341
2342 basedev = block->base;
2343 private = (struct dasd_eckd_private *) basedev->private;
2344
2345 /* Calculate number of blocks/records per track. */
2346 blksize = block->bp_block;
2347 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2348 /* Calculate record id of first and last block. */
2349 first_rec = first_trk = req->sector >> block->s2b_shift;
2350 first_offs = sector_div(first_trk, blk_per_trk);
2351 last_rec = last_trk =
2352 (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
2353 last_offs = sector_div(last_trk, blk_per_trk);
2354 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2355
2356 /* is transport mode supported ? */
2357 fcx_in_css = css_general_characteristics.fcx;
2358 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2359 fcx_in_features = private->features.feature[40] & 0x80;
2360 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
2361
2362 /* is read track data and write track data in command mode supported? */
2363 cmdrtd = private->features.feature[9] & 0x20;
2364 cmdwtd = private->features.feature[12] & 0x40;
2365 use_prefix = private->features.feature[8] & 0x01;
2366
2367 cqr = NULL;
2368 if (cdlspecial || dasd_page_cache) {
2369 /* do nothing, just fall through to the cmd mode single case */
2370 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2371 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2372 first_rec, last_rec,
2373 first_trk, last_trk,
2374 first_offs, last_offs,
2375 blk_per_trk, blksize);
2376 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2377 cqr = NULL;
2378 } else if (use_prefix &&
2379 (((rq_data_dir(req) == READ) && cmdrtd) ||
2380 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2381 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2382 first_rec, last_rec,
2383 first_trk, last_trk,
2384 first_offs, last_offs,
2385 blk_per_trk, blksize);
2386 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2387 cqr = NULL;
2388 }
2389 if (!cqr)
2390 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2391 first_rec, last_rec,
2392 first_trk, last_trk,
2393 first_offs, last_offs,
2394 blk_per_trk, blksize);
2395 return cqr;
2396 }
2397
2398 static int
2399 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2400 {
2401 struct dasd_eckd_private *private;
2402 struct ccw1 *ccw;
2403 struct req_iterator iter;
2404 struct bio_vec *bv;
2405 char *dst, *cda;
2406 unsigned int blksize, blk_per_trk, off;
2407 sector_t recid;
2408 int status;
2409
2410 if (!dasd_page_cache)
2411 goto out;
2412 private = (struct dasd_eckd_private *) cqr->block->base->private;
2413 blksize = cqr->block->bp_block;
2414 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2415 recid = req->sector >> cqr->block->s2b_shift;
2416 ccw = cqr->cpaddr;
2417 /* Skip over define extent & locate record. */
2418 ccw++;
2419 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2420 ccw++;
2421 rq_for_each_segment(bv, req, iter) {
2422 dst = page_address(bv->bv_page) + bv->bv_offset;
2423 for (off = 0; off < bv->bv_len; off += blksize) {
2424 /* Skip locate record. */
2425 if (private->uses_cdl && recid <= 2*blk_per_trk)
2426 ccw++;
2427 if (dst) {
2428 if (ccw->flags & CCW_FLAG_IDA)
2429 cda = *((char **)((addr_t) ccw->cda));
2430 else
2431 cda = (char *)((addr_t) ccw->cda);
2432 if (dst != cda) {
2433 if (rq_data_dir(req) == READ)
2434 memcpy(dst, cda, bv->bv_len);
2435 kmem_cache_free(dasd_page_cache,
2436 (void *)((addr_t)cda & PAGE_MASK));
2437 }
2438 dst = NULL;
2439 }
2440 ccw++;
2441 recid++;
2442 }
2443 }
2444 out:
2445 status = cqr->status == DASD_CQR_DONE;
2446 dasd_sfree_request(cqr, cqr->memdev);
2447 return status;
2448 }
2449
2450 /*
2451 * Modify ccw/tcw in cqr so it can be started on a base device.
2452 *
2453 * Note that this is not enough to restart the cqr!
2454 * Either reset cqr->startdev as well (summary unit check handling)
2455 * or restart via separate cqr (as in ERP handling).
2456 */
2457 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2458 {
2459 struct ccw1 *ccw;
2460 struct PFX_eckd_data *pfxdata;
2461 struct tcw *tcw;
2462 struct tccb *tccb;
2463 struct dcw *dcw;
2464
2465 if (cqr->cpmode == 1) {
2466 tcw = cqr->cpaddr;
2467 tccb = tcw_get_tccb(tcw);
2468 dcw = (struct dcw *)&tccb->tca[0];
2469 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
2470 pfxdata->validity.verify_base = 0;
2471 pfxdata->validity.hyper_pav = 0;
2472 } else {
2473 ccw = cqr->cpaddr;
2474 pfxdata = cqr->data;
2475 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2476 pfxdata->validity.verify_base = 0;
2477 pfxdata->validity.hyper_pav = 0;
2478 }
2479 }
2480 }
2481
2482 #define DASD_ECKD_CHANQ_MAX_SIZE 4
2483
2484 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2485 struct dasd_block *block,
2486 struct request *req)
2487 {
2488 struct dasd_eckd_private *private;
2489 struct dasd_device *startdev;
2490 unsigned long flags;
2491 struct dasd_ccw_req *cqr;
2492
2493 startdev = dasd_alias_get_start_dev(base);
2494 if (!startdev)
2495 startdev = base;
2496 private = (struct dasd_eckd_private *) startdev->private;
2497 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2498 return ERR_PTR(-EBUSY);
2499
2500 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2501 private->count++;
2502 cqr = dasd_eckd_build_cp(startdev, block, req);
2503 if (IS_ERR(cqr))
2504 private->count--;
2505 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2506 return cqr;
2507 }
2508
2509 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2510 struct request *req)
2511 {
2512 struct dasd_eckd_private *private;
2513 unsigned long flags;
2514
2515 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2516 private = (struct dasd_eckd_private *) cqr->memdev->private;
2517 private->count--;
2518 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2519 return dasd_eckd_free_cp(cqr, req);
2520 }
2521
2522 static int
2523 dasd_eckd_fill_info(struct dasd_device * device,
2524 struct dasd_information2_t * info)
2525 {
2526 struct dasd_eckd_private *private;
2527
2528 private = (struct dasd_eckd_private *) device->private;
2529 info->label_block = 2;
2530 info->FBA_layout = private->uses_cdl ? 0 : 1;
2531 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2532 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2533 memcpy(info->characteristics, &private->rdc_data,
2534 sizeof(struct dasd_eckd_characteristics));
2535 info->confdata_size = min((unsigned long)private->conf_len,
2536 sizeof(info->configuration_data));
2537 memcpy(info->configuration_data, private->conf_data,
2538 info->confdata_size);
2539 return 0;
2540 }
2541
2542 /*
2543 * SECTION: ioctl functions for eckd devices.
2544 */
2545
2546 /*
2547 * Release device ioctl.
2548 * Buils a channel programm to releases a prior reserved
2549 * (see dasd_eckd_reserve) device.
2550 */
2551 static int
2552 dasd_eckd_release(struct dasd_device *device)
2553 {
2554 struct dasd_ccw_req *cqr;
2555 int rc;
2556 struct ccw1 *ccw;
2557
2558 if (!capable(CAP_SYS_ADMIN))
2559 return -EACCES;
2560
2561 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2562 1, 32, device);
2563 if (IS_ERR(cqr)) {
2564 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2565 "Could not allocate initialization request");
2566 return PTR_ERR(cqr);
2567 }
2568 ccw = cqr->cpaddr;
2569 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2570 ccw->flags |= CCW_FLAG_SLI;
2571 ccw->count = 32;
2572 ccw->cda = (__u32)(addr_t) cqr->data;
2573 cqr->startdev = device;
2574 cqr->memdev = device;
2575 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2576 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2577 cqr->retries = 2; /* set retry counter to enable basic ERP */
2578 cqr->expires = 2 * HZ;
2579 cqr->buildclk = get_clock();
2580 cqr->status = DASD_CQR_FILLED;
2581
2582 rc = dasd_sleep_on_immediatly(cqr);
2583
2584 dasd_sfree_request(cqr, cqr->memdev);
2585 return rc;
2586 }
2587
2588 /*
2589 * Reserve device ioctl.
2590 * Options are set to 'synchronous wait for interrupt' and
2591 * 'timeout the request'. This leads to a terminate IO if
2592 * the interrupt is outstanding for a certain time.
2593 */
2594 static int
2595 dasd_eckd_reserve(struct dasd_device *device)
2596 {
2597 struct dasd_ccw_req *cqr;
2598 int rc;
2599 struct ccw1 *ccw;
2600
2601 if (!capable(CAP_SYS_ADMIN))
2602 return -EACCES;
2603
2604 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2605 1, 32, device);
2606 if (IS_ERR(cqr)) {
2607 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2608 "Could not allocate initialization request");
2609 return PTR_ERR(cqr);
2610 }
2611 ccw = cqr->cpaddr;
2612 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2613 ccw->flags |= CCW_FLAG_SLI;
2614 ccw->count = 32;
2615 ccw->cda = (__u32)(addr_t) cqr->data;
2616 cqr->startdev = device;
2617 cqr->memdev = device;
2618 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2619 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2620 cqr->retries = 2; /* set retry counter to enable basic ERP */
2621 cqr->expires = 2 * HZ;
2622 cqr->buildclk = get_clock();
2623 cqr->status = DASD_CQR_FILLED;
2624
2625 rc = dasd_sleep_on_immediatly(cqr);
2626
2627 dasd_sfree_request(cqr, cqr->memdev);
2628 return rc;
2629 }
2630
2631 /*
2632 * Steal lock ioctl - unconditional reserve device.
2633 * Buils a channel programm to break a device's reservation.
2634 * (unconditional reserve)
2635 */
2636 static int
2637 dasd_eckd_steal_lock(struct dasd_device *device)
2638 {
2639 struct dasd_ccw_req *cqr;
2640 int rc;
2641 struct ccw1 *ccw;
2642
2643 if (!capable(CAP_SYS_ADMIN))
2644 return -EACCES;
2645
2646 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2647 1, 32, device);
2648 if (IS_ERR(cqr)) {
2649 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2650 "Could not allocate initialization request");
2651 return PTR_ERR(cqr);
2652 }
2653 ccw = cqr->cpaddr;
2654 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2655 ccw->flags |= CCW_FLAG_SLI;
2656 ccw->count = 32;
2657 ccw->cda = (__u32)(addr_t) cqr->data;
2658 cqr->startdev = device;
2659 cqr->memdev = device;
2660 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2661 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2662 cqr->retries = 2; /* set retry counter to enable basic ERP */
2663 cqr->expires = 2 * HZ;
2664 cqr->buildclk = get_clock();
2665 cqr->status = DASD_CQR_FILLED;
2666
2667 rc = dasd_sleep_on_immediatly(cqr);
2668
2669 dasd_sfree_request(cqr, cqr->memdev);
2670 return rc;
2671 }
2672
2673 /*
2674 * Read performance statistics
2675 */
2676 static int
2677 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
2678 {
2679 struct dasd_psf_prssd_data *prssdp;
2680 struct dasd_rssd_perf_stats_t *stats;
2681 struct dasd_ccw_req *cqr;
2682 struct ccw1 *ccw;
2683 int rc;
2684
2685 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2686 1 /* PSF */ + 1 /* RSSD */ ,
2687 (sizeof(struct dasd_psf_prssd_data) +
2688 sizeof(struct dasd_rssd_perf_stats_t)),
2689 device);
2690 if (IS_ERR(cqr)) {
2691 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2692 "Could not allocate initialization request");
2693 return PTR_ERR(cqr);
2694 }
2695 cqr->startdev = device;
2696 cqr->memdev = device;
2697 cqr->retries = 0;
2698 cqr->expires = 10 * HZ;
2699
2700 /* Prepare for Read Subsystem Data */
2701 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2702 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
2703 prssdp->order = PSF_ORDER_PRSSD;
2704 prssdp->suborder = 0x01; /* Performance Statistics */
2705 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2706
2707 ccw = cqr->cpaddr;
2708 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2709 ccw->count = sizeof(struct dasd_psf_prssd_data);
2710 ccw->flags |= CCW_FLAG_CC;
2711 ccw->cda = (__u32)(addr_t) prssdp;
2712
2713 /* Read Subsystem Data - Performance Statistics */
2714 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2715 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
2716
2717 ccw++;
2718 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2719 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
2720 ccw->cda = (__u32)(addr_t) stats;
2721
2722 cqr->buildclk = get_clock();
2723 cqr->status = DASD_CQR_FILLED;
2724 rc = dasd_sleep_on(cqr);
2725 if (rc == 0) {
2726 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2727 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2728 if (copy_to_user(argp, stats,
2729 sizeof(struct dasd_rssd_perf_stats_t)))
2730 rc = -EFAULT;
2731 }
2732 dasd_sfree_request(cqr, cqr->memdev);
2733 return rc;
2734 }
2735
2736 /*
2737 * Get attributes (cache operations)
2738 * Returnes the cache attributes used in Define Extend (DE).
2739 */
2740 static int
2741 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
2742 {
2743 struct dasd_eckd_private *private =
2744 (struct dasd_eckd_private *)device->private;
2745 struct attrib_data_t attrib = private->attrib;
2746 int rc;
2747
2748 if (!capable(CAP_SYS_ADMIN))
2749 return -EACCES;
2750 if (!argp)
2751 return -EINVAL;
2752
2753 rc = 0;
2754 if (copy_to_user(argp, (long *) &attrib,
2755 sizeof(struct attrib_data_t)))
2756 rc = -EFAULT;
2757
2758 return rc;
2759 }
2760
2761 /*
2762 * Set attributes (cache operations)
2763 * Stores the attributes for cache operation to be used in Define Extend (DE).
2764 */
2765 static int
2766 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
2767 {
2768 struct dasd_eckd_private *private =
2769 (struct dasd_eckd_private *)device->private;
2770 struct attrib_data_t attrib;
2771
2772 if (!capable(CAP_SYS_ADMIN))
2773 return -EACCES;
2774 if (!argp)
2775 return -EINVAL;
2776
2777 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
2778 return -EFAULT;
2779 private->attrib = attrib;
2780
2781 dev_info(&device->cdev->dev,
2782 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2783 private->attrib.operation, private->attrib.nr_cyl);
2784 return 0;
2785 }
2786
2787 /*
2788 * Issue syscall I/O to EMC Symmetrix array.
2789 * CCWs are PSF and RSSD
2790 */
2791 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2792 {
2793 struct dasd_symmio_parms usrparm;
2794 char *psf_data, *rssd_result;
2795 struct dasd_ccw_req *cqr;
2796 struct ccw1 *ccw;
2797 int rc;
2798
2799 /* Copy parms from caller */
2800 rc = -EFAULT;
2801 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2802 goto out;
2803 #ifndef CONFIG_64BIT
2804 /* Make sure pointers are sane even on 31 bit. */
2805 if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
2806 rc = -EINVAL;
2807 goto out;
2808 }
2809 #endif
2810 /* alloc I/O data area */
2811 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2812 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2813 if (!psf_data || !rssd_result) {
2814 rc = -ENOMEM;
2815 goto out_free;
2816 }
2817
2818 /* get syscall header from user space */
2819 rc = -EFAULT;
2820 if (copy_from_user(psf_data,
2821 (void __user *)(unsigned long) usrparm.psf_data,
2822 usrparm.psf_data_len))
2823 goto out_free;
2824
2825 /* sanity check on syscall header */
2826 if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
2827 rc = -EINVAL;
2828 goto out_free;
2829 }
2830
2831 /* setup CCWs for PSF + RSSD */
2832 cqr = dasd_smalloc_request("ECKD", 2 , 0, device);
2833 if (IS_ERR(cqr)) {
2834 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2835 "Could not allocate initialization request");
2836 rc = PTR_ERR(cqr);
2837 goto out_free;
2838 }
2839
2840 cqr->startdev = device;
2841 cqr->memdev = device;
2842 cqr->retries = 3;
2843 cqr->expires = 10 * HZ;
2844 cqr->buildclk = get_clock();
2845 cqr->status = DASD_CQR_FILLED;
2846
2847 /* Build the ccws */
2848 ccw = cqr->cpaddr;
2849
2850 /* PSF ccw */
2851 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2852 ccw->count = usrparm.psf_data_len;
2853 ccw->flags |= CCW_FLAG_CC;
2854 ccw->cda = (__u32)(addr_t) psf_data;
2855
2856 ccw++;
2857
2858 /* RSSD ccw */
2859 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2860 ccw->count = usrparm.rssd_result_len;
2861 ccw->flags = CCW_FLAG_SLI ;
2862 ccw->cda = (__u32)(addr_t) rssd_result;
2863
2864 rc = dasd_sleep_on(cqr);
2865 if (rc)
2866 goto out_sfree;
2867
2868 rc = -EFAULT;
2869 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2870 rssd_result, usrparm.rssd_result_len))
2871 goto out_sfree;
2872 rc = 0;
2873
2874 out_sfree:
2875 dasd_sfree_request(cqr, cqr->memdev);
2876 out_free:
2877 kfree(rssd_result);
2878 kfree(psf_data);
2879 out:
2880 DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
2881 return rc;
2882 }
2883
2884 static int
2885 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
2886 {
2887 struct dasd_device *device = block->base;
2888
2889 switch (cmd) {
2890 case BIODASDGATTR:
2891 return dasd_eckd_get_attrib(device, argp);
2892 case BIODASDSATTR:
2893 return dasd_eckd_set_attrib(device, argp);
2894 case BIODASDPSRD:
2895 return dasd_eckd_performance(device, argp);
2896 case BIODASDRLSE:
2897 return dasd_eckd_release(device);
2898 case BIODASDRSRV:
2899 return dasd_eckd_reserve(device);
2900 case BIODASDSLCK:
2901 return dasd_eckd_steal_lock(device);
2902 case BIODASDSYMMIO:
2903 return dasd_symm_io(device, argp);
2904 default:
2905 return -ENOIOCTLCMD;
2906 }
2907 }
2908
2909 /*
2910 * Dump the range of CCWs into 'page' buffer
2911 * and return number of printed chars.
2912 */
2913 static int
2914 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
2915 {
2916 int len, count;
2917 char *datap;
2918
2919 len = 0;
2920 while (from <= to) {
2921 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2922 " CCW %p: %08X %08X DAT:",
2923 from, ((int *) from)[0], ((int *) from)[1]);
2924
2925 /* get pointer to data (consider IDALs) */
2926 if (from->flags & CCW_FLAG_IDA)
2927 datap = (char *) *((addr_t *) (addr_t) from->cda);
2928 else
2929 datap = (char *) ((addr_t) from->cda);
2930
2931 /* dump data (max 32 bytes) */
2932 for (count = 0; count < from->count && count < 32; count++) {
2933 if (count % 8 == 0) len += sprintf(page + len, " ");
2934 if (count % 4 == 0) len += sprintf(page + len, " ");
2935 len += sprintf(page + len, "%02x", datap[count]);
2936 }
2937 len += sprintf(page + len, "\n");
2938 from++;
2939 }
2940 return len;
2941 }
2942
2943 static void
2944 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct dasd_ccw_req *req,
2945 struct irb *irb, char *reason)
2946 {
2947 u64 *sense;
2948 int sl;
2949 struct tsb *tsb;
2950
2951 sense = NULL;
2952 tsb = NULL;
2953 if (req && scsw_is_tm(&req->irb.scsw)) {
2954 if (irb->scsw.tm.tcw)
2955 tsb = tcw_get_tsb(
2956 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
2957 if (tsb && (irb->scsw.tm.fcxs == 0x01)) {
2958 switch (tsb->flags & 0x07) {
2959 case 1: /* tsa_iostat */
2960 sense = (u64 *)tsb->tsa.iostat.sense;
2961 break;
2962 case 2: /* ts_ddpc */
2963 sense = (u64 *)tsb->tsa.ddpc.sense;
2964 break;
2965 case 3: /* tsa_intrg */
2966 break;
2967 }
2968 }
2969 } else {
2970 if (irb->esw.esw0.erw.cons)
2971 sense = (u64 *)irb->ecw;
2972 }
2973 if (sense) {
2974 for (sl = 0; sl < 4; sl++) {
2975 DBF_DEV_EVENT(DBF_EMERG, device,
2976 "%s: %016llx %016llx %016llx %016llx",
2977 reason, sense[0], sense[1], sense[2],
2978 sense[3]);
2979 }
2980 } else {
2981 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
2982 "SORRY - NO VALID SENSE AVAILABLE\n");
2983 }
2984 }
2985
2986 /*
2987 * Print sense data and related channel program.
2988 * Parts are printed because printk buffer is only 1024 bytes.
2989 */
2990 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
2991 struct dasd_ccw_req *req, struct irb *irb)
2992 {
2993 char *page;
2994 struct ccw1 *first, *last, *fail, *from, *to;
2995 int len, sl, sct;
2996
2997 page = (char *) get_zeroed_page(GFP_ATOMIC);
2998 if (page == NULL) {
2999 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3000 "No memory to dump sense data\n");
3001 return;
3002 }
3003 /* dump the sense data */
3004 len = sprintf(page, KERN_ERR PRINTK_HEADER
3005 " I/O status report for device %s:\n",
3006 dev_name(&device->cdev->dev));
3007 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3008 " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
3009 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw));
3010 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3011 " device %s: Failing CCW: %p\n",
3012 dev_name(&device->cdev->dev),
3013 (void *) (addr_t) irb->scsw.cmd.cpa);
3014 if (irb->esw.esw0.erw.cons) {
3015 for (sl = 0; sl < 4; sl++) {
3016 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3017 " Sense(hex) %2d-%2d:",
3018 (8 * sl), ((8 * sl) + 7));
3019
3020 for (sct = 0; sct < 8; sct++) {
3021 len += sprintf(page + len, " %02x",
3022 irb->ecw[8 * sl + sct]);
3023 }
3024 len += sprintf(page + len, "\n");
3025 }
3026
3027 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3028 /* 24 Byte Sense Data */
3029 sprintf(page + len, KERN_ERR PRINTK_HEADER
3030 " 24 Byte: %x MSG %x, "
3031 "%s MSGb to SYSOP\n",
3032 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3033 irb->ecw[1] & 0x10 ? "" : "no");
3034 } else {
3035 /* 32 Byte Sense Data */
3036 sprintf(page + len, KERN_ERR PRINTK_HEADER
3037 " 32 Byte: Format: %x "
3038 "Exception class %x\n",
3039 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
3040 }
3041 } else {
3042 sprintf(page + len, KERN_ERR PRINTK_HEADER
3043 " SORRY - NO VALID SENSE AVAILABLE\n");
3044 }
3045 printk("%s", page);
3046
3047 if (req) {
3048 /* req == NULL for unsolicited interrupts */
3049 /* dump the Channel Program (max 140 Bytes per line) */
3050 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3051 first = req->cpaddr;
3052 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3053 to = min(first + 6, last);
3054 len = sprintf(page, KERN_ERR PRINTK_HEADER
3055 " Related CP in req: %p\n", req);
3056 dasd_eckd_dump_ccw_range(first, to, page + len);
3057 printk("%s", page);
3058
3059 /* print failing CCW area (maximum 4) */
3060 /* scsw->cda is either valid or zero */
3061 len = 0;
3062 from = ++to;
3063 fail = (struct ccw1 *)(addr_t)
3064 irb->scsw.cmd.cpa; /* failing CCW */
3065 if (from < fail - 2) {
3066 from = fail - 2; /* there is a gap - print header */
3067 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3068 }
3069 to = min(fail + 1, last);
3070 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3071
3072 /* print last CCWs (maximum 2) */
3073 from = max(from, ++to);
3074 if (from < last - 1) {
3075 from = last - 1; /* there is a gap - print header */
3076 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3077 }
3078 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3079 if (len > 0)
3080 printk("%s", page);
3081 }
3082 free_page((unsigned long) page);
3083 }
3084
3085
3086 /*
3087 * Print sense data from a tcw.
3088 */
3089 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3090 struct dasd_ccw_req *req, struct irb *irb)
3091 {
3092 char *page;
3093 int len, sl, sct, residual;
3094
3095 struct tsb *tsb;
3096 u8 *sense;
3097
3098
3099 page = (char *) get_zeroed_page(GFP_ATOMIC);
3100 if (page == NULL) {
3101 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
3102 "No memory to dump sense data");
3103 return;
3104 }
3105 /* dump the sense data */
3106 len = sprintf(page, KERN_ERR PRINTK_HEADER
3107 " I/O status report for device %s:\n",
3108 dev_name(&device->cdev->dev));
3109 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3110 " in req: %p CS: 0x%02X DS: 0x%02X "
3111 "fcxs: 0x%02X schxs: 0x%02X\n", req,
3112 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3113 irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3114 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3115 " device %s: Failing TCW: %p\n",
3116 dev_name(&device->cdev->dev),
3117 (void *) (addr_t) irb->scsw.tm.tcw);
3118
3119 tsb = NULL;
3120 sense = NULL;
3121 if (irb->scsw.tm.tcw)
3122 tsb = tcw_get_tsb(
3123 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3124
3125 if (tsb && (irb->scsw.tm.fcxs == 0x01)) {
3126 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3127 " tsb->length %d\n", tsb->length);
3128 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3129 " tsb->flags %x\n", tsb->flags);
3130 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3131 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3132 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3133 " tsb->count %d\n", tsb->count);
3134 residual = tsb->count - 28;
3135 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3136 " residual %d\n", residual);
3137
3138 switch (tsb->flags & 0x07) {
3139 case 1: /* tsa_iostat */
3140 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3141 " tsb->tsa.iostat.dev_time %d\n",
3142 tsb->tsa.iostat.dev_time);
3143 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3144 " tsb->tsa.iostat.def_time %d\n",
3145 tsb->tsa.iostat.def_time);
3146 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3147 " tsb->tsa.iostat.queue_time %d\n",
3148 tsb->tsa.iostat.queue_time);
3149 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3150 " tsb->tsa.iostat.dev_busy_time %d\n",
3151 tsb->tsa.iostat.dev_busy_time);
3152 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3153 " tsb->tsa.iostat.dev_act_time %d\n",
3154 tsb->tsa.iostat.dev_act_time);
3155 sense = tsb->tsa.iostat.sense;
3156 break;
3157 case 2: /* ts_ddpc */
3158 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3159 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3160 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3161 " tsb->tsa.ddpc.rcq: ");
3162 for (sl = 0; sl < 16; sl++) {
3163 for (sct = 0; sct < 8; sct++) {
3164 len += sprintf(page + len, " %02x",
3165 tsb->tsa.ddpc.rcq[sl]);
3166 }
3167 len += sprintf(page + len, "\n");
3168 }
3169 sense = tsb->tsa.ddpc.sense;
3170 break;
3171 case 3: /* tsa_intrg */
3172 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3173 " tsb->tsa.intrg.: not supportet yet \n");
3174 break;
3175 }
3176
3177 if (sense) {
3178 for (sl = 0; sl < 4; sl++) {
3179 len += sprintf(page + len,
3180 KERN_ERR PRINTK_HEADER
3181 " Sense(hex) %2d-%2d:",
3182 (8 * sl), ((8 * sl) + 7));
3183 for (sct = 0; sct < 8; sct++) {
3184 len += sprintf(page + len, " %02x",
3185 sense[8 * sl + sct]);
3186 }
3187 len += sprintf(page + len, "\n");
3188 }
3189
3190 if (sense[27] & DASD_SENSE_BIT_0) {
3191 /* 24 Byte Sense Data */
3192 sprintf(page + len, KERN_ERR PRINTK_HEADER
3193 " 24 Byte: %x MSG %x, "
3194 "%s MSGb to SYSOP\n",
3195 sense[7] >> 4, sense[7] & 0x0f,
3196 sense[1] & 0x10 ? "" : "no");
3197 } else {
3198 /* 32 Byte Sense Data */
3199 sprintf(page + len, KERN_ERR PRINTK_HEADER
3200 " 32 Byte: Format: %x "
3201 "Exception class %x\n",
3202 sense[6] & 0x0f, sense[22] >> 4);
3203 }
3204 } else {
3205 sprintf(page + len, KERN_ERR PRINTK_HEADER
3206 " SORRY - NO VALID SENSE AVAILABLE\n");
3207 }
3208 } else {
3209 sprintf(page + len, KERN_ERR PRINTK_HEADER
3210 " SORRY - NO TSB DATA AVAILABLE\n");
3211 }
3212 printk("%s", page);
3213 free_page((unsigned long) page);
3214 }
3215
3216 static void dasd_eckd_dump_sense(struct dasd_device *device,
3217 struct dasd_ccw_req *req, struct irb *irb)
3218 {
3219 if (req && scsw_is_tm(&req->irb.scsw))
3220 dasd_eckd_dump_sense_tcw(device, req, irb);
3221 else
3222 dasd_eckd_dump_sense_ccw(device, req, irb);
3223 }
3224
3225
3226 /*
3227 * max_blocks is dependent on the amount of storage that is available
3228 * in the static io buffer for each device. Currently each device has
3229 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3230 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3231 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3232 * addition we have one define extent ccw + 16 bytes of data and one
3233 * locate record ccw + 16 bytes of data. That makes:
3234 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3235 * We want to fit two into the available memory so that we can immediately
3236 * start the next request if one finishes off. That makes 249.5 blocks
3237 * for one request. Give a little safety and the result is 240.
3238 */
3239 static struct dasd_discipline dasd_eckd_discipline = {
3240 .owner = THIS_MODULE,
3241 .name = "ECKD",
3242 .ebcname = "ECKD",
3243 .max_blocks = 240,
3244 .check_device = dasd_eckd_check_characteristics,
3245 .uncheck_device = dasd_eckd_uncheck_device,
3246 .do_analysis = dasd_eckd_do_analysis,
3247 .ready_to_online = dasd_eckd_ready_to_online,
3248 .online_to_ready = dasd_eckd_online_to_ready,
3249 .fill_geometry = dasd_eckd_fill_geometry,
3250 .start_IO = dasd_start_IO,
3251 .term_IO = dasd_term_IO,
3252 .handle_terminated_request = dasd_eckd_handle_terminated_request,
3253 .format_device = dasd_eckd_format_device,
3254 .erp_action = dasd_eckd_erp_action,
3255 .erp_postaction = dasd_eckd_erp_postaction,
3256 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3257 .build_cp = dasd_eckd_build_alias_cp,
3258 .free_cp = dasd_eckd_free_alias_cp,
3259 .dump_sense = dasd_eckd_dump_sense,
3260 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
3261 .fill_info = dasd_eckd_fill_info,
3262 .ioctl = dasd_eckd_ioctl,
3263 };
3264
3265 static int __init
3266 dasd_eckd_init(void)
3267 {
3268 ASCEBC(dasd_eckd_discipline.ebcname, 4);
3269 return ccw_driver_register(&dasd_eckd_driver);
3270 }
3271
3272 static void __exit
3273 dasd_eckd_cleanup(void)
3274 {
3275 ccw_driver_unregister(&dasd_eckd_driver);
3276 }
3277
3278 module_init(dasd_eckd_init);
3279 module_exit(dasd_eckd_cleanup);
Linux with added FPC-III support