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initial commit with v2.6.32.60
[linux-2.6.32.60-moxart.git] / drivers / s390 / block / dasd_eckd.c
blobee23d4e971b1b362c98433c8f84d5d7a756aded6
1 /*
2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Horst Hummel <Horst.Hummel@de.ibm.com>
5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
8 * Copyright IBM Corp. 1999, 2009
9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
11 */
12
13 #define KMSG_COMPONENT "dasd-eckd"
14
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/hdreg.h> /* HDIO_GETGEO */
19 #include <linux/bio.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/compat.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, 0x3380, 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_DEVID(DBF_WARNING, cdev, "%s",
93 "dasd_eckd_probe: could not set "
94 "ccw-device options");
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 const int sizes_trk0[] = { 28, 148, 84 };
108 #define LABEL_SIZE 140
109
110 static inline unsigned int
111 round_up_multiple(unsigned int no, unsigned int mult)
112 {
113 int rem = no % mult;
114 return (rem ? no - rem + mult : no);
115 }
116
117 static inline unsigned int
118 ceil_quot(unsigned int d1, unsigned int d2)
119 {
120 return (d1 + (d2 - 1)) / d2;
121 }
122
123 static unsigned int
124 recs_per_track(struct dasd_eckd_characteristics * rdc,
125 unsigned int kl, unsigned int dl)
126 {
127 int dn, kn;
128
129 switch (rdc->dev_type) {
130 case 0x3380:
131 if (kl)
132 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
133 ceil_quot(dl + 12, 32));
134 else
135 return 1499 / (15 + ceil_quot(dl + 12, 32));
136 case 0x3390:
137 dn = ceil_quot(dl + 6, 232) + 1;
138 if (kl) {
139 kn = ceil_quot(kl + 6, 232) + 1;
140 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
141 9 + ceil_quot(dl + 6 * dn, 34));
142 } else
143 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
144 case 0x9345:
145 dn = ceil_quot(dl + 6, 232) + 1;
146 if (kl) {
147 kn = ceil_quot(kl + 6, 232) + 1;
148 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
149 ceil_quot(dl + 6 * dn, 34));
150 } else
151 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
152 }
153 return 0;
154 }
155
156 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
157 {
158 geo->cyl = (__u16) cyl;
159 geo->head = cyl >> 16;
160 geo->head <<= 4;
161 geo->head |= head;
162 }
163
164 static int
165 check_XRC (struct ccw1 *de_ccw,
166 struct DE_eckd_data *data,
167 struct dasd_device *device)
168 {
169 struct dasd_eckd_private *private;
170 int rc;
171
172 private = (struct dasd_eckd_private *) device->private;
173 if (!private->rdc_data.facilities.XRC_supported)
174 return 0;
175
176 /* switch on System Time Stamp - needed for XRC Support */
177 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
178 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
179
180 rc = get_sync_clock(&data->ep_sys_time);
181 /* Ignore return code if sync clock is switched off. */
182 if (rc == -ENOSYS || rc == -EACCES)
183 rc = 0;
184
185 de_ccw->count = sizeof(struct DE_eckd_data);
186 de_ccw->flags |= CCW_FLAG_SLI;
187 return rc;
188 }
189
190 static int
191 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
192 unsigned int totrk, int cmd, struct dasd_device *device)
193 {
194 struct dasd_eckd_private *private;
195 u32 begcyl, endcyl;
196 u16 heads, beghead, endhead;
197 int rc = 0;
198
199 private = (struct dasd_eckd_private *) device->private;
200
201 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
202 ccw->flags = 0;
203 ccw->count = 16;
204 ccw->cda = (__u32) __pa(data);
205
206 memset(data, 0, sizeof(struct DE_eckd_data));
207 switch (cmd) {
208 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
209 case DASD_ECKD_CCW_READ_RECORD_ZERO:
210 case DASD_ECKD_CCW_READ:
211 case DASD_ECKD_CCW_READ_MT:
212 case DASD_ECKD_CCW_READ_CKD:
213 case DASD_ECKD_CCW_READ_CKD_MT:
214 case DASD_ECKD_CCW_READ_KD:
215 case DASD_ECKD_CCW_READ_KD_MT:
216 case DASD_ECKD_CCW_READ_COUNT:
217 data->mask.perm = 0x1;
218 data->attributes.operation = private->attrib.operation;
219 break;
220 case DASD_ECKD_CCW_WRITE:
221 case DASD_ECKD_CCW_WRITE_MT:
222 case DASD_ECKD_CCW_WRITE_KD:
223 case DASD_ECKD_CCW_WRITE_KD_MT:
224 data->mask.perm = 0x02;
225 data->attributes.operation = private->attrib.operation;
226 rc = check_XRC (ccw, data, device);
227 break;
228 case DASD_ECKD_CCW_WRITE_CKD:
229 case DASD_ECKD_CCW_WRITE_CKD_MT:
230 data->attributes.operation = DASD_BYPASS_CACHE;
231 rc = check_XRC (ccw, data, device);
232 break;
233 case DASD_ECKD_CCW_ERASE:
234 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
235 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
236 data->mask.perm = 0x3;
237 data->mask.auth = 0x1;
238 data->attributes.operation = DASD_BYPASS_CACHE;
239 rc = check_XRC (ccw, data, device);
240 break;
241 default:
242 dev_err(&device->cdev->dev,
243 "0x%x is not a known command\n", cmd);
244 break;
245 }
246
247 data->attributes.mode = 0x3; /* ECKD */
248
249 if ((private->rdc_data.cu_type == 0x2105 ||
250 private->rdc_data.cu_type == 0x2107 ||
251 private->rdc_data.cu_type == 0x1750)
252 && !(private->uses_cdl && trk < 2))
253 data->ga_extended |= 0x40; /* Regular Data Format Mode */
254
255 heads = private->rdc_data.trk_per_cyl;
256 begcyl = trk / heads;
257 beghead = trk % heads;
258 endcyl = totrk / heads;
259 endhead = totrk % heads;
260
261 /* check for sequential prestage - enhance cylinder range */
262 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
263 data->attributes.operation == DASD_SEQ_ACCESS) {
264
265 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
266 endcyl += private->attrib.nr_cyl;
267 else
268 endcyl = (private->real_cyl - 1);
269 }
270
271 set_ch_t(&data->beg_ext, begcyl, beghead);
272 set_ch_t(&data->end_ext, endcyl, endhead);
273 return rc;
274 }
275
276 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
277 struct dasd_device *device)
278 {
279 struct dasd_eckd_private *private;
280 int rc;
281
282 private = (struct dasd_eckd_private *) device->private;
283 if (!private->rdc_data.facilities.XRC_supported)
284 return 0;
285
286 /* switch on System Time Stamp - needed for XRC Support */
287 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
288 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
289 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
290
291 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
292 /* Ignore return code if sync clock is switched off. */
293 if (rc == -ENOSYS || rc == -EACCES)
294 rc = 0;
295 return rc;
296 }
297
298 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
299 unsigned int rec_on_trk, int count, int cmd,
300 struct dasd_device *device, unsigned int reclen,
301 unsigned int tlf)
302 {
303 struct dasd_eckd_private *private;
304 int sector;
305 int dn, d;
306
307 private = (struct dasd_eckd_private *) device->private;
308
309 memset(data, 0, sizeof(*data));
310 sector = 0;
311 if (rec_on_trk) {
312 switch (private->rdc_data.dev_type) {
313 case 0x3390:
314 dn = ceil_quot(reclen + 6, 232);
315 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
316 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
317 break;
318 case 0x3380:
319 d = 7 + ceil_quot(reclen + 12, 32);
320 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
321 break;
322 }
323 }
324 data->sector = sector;
325 /* note: meaning of count depends on the operation
326 * for record based I/O it's the number of records, but for
327 * track based I/O it's the number of tracks
328 */
329 data->count = count;
330 switch (cmd) {
331 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
332 data->operation.orientation = 0x3;
333 data->operation.operation = 0x03;
334 break;
335 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
336 data->operation.orientation = 0x3;
337 data->operation.operation = 0x16;
338 break;
339 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
340 data->operation.orientation = 0x1;
341 data->operation.operation = 0x03;
342 data->count++;
343 break;
344 case DASD_ECKD_CCW_READ_RECORD_ZERO:
345 data->operation.orientation = 0x3;
346 data->operation.operation = 0x16;
347 data->count++;
348 break;
349 case DASD_ECKD_CCW_WRITE:
350 case DASD_ECKD_CCW_WRITE_MT:
351 case DASD_ECKD_CCW_WRITE_KD:
352 case DASD_ECKD_CCW_WRITE_KD_MT:
353 data->auxiliary.length_valid = 0x1;
354 data->length = reclen;
355 data->operation.operation = 0x01;
356 break;
357 case DASD_ECKD_CCW_WRITE_CKD:
358 case DASD_ECKD_CCW_WRITE_CKD_MT:
359 data->auxiliary.length_valid = 0x1;
360 data->length = reclen;
361 data->operation.operation = 0x03;
362 break;
363 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
364 data->auxiliary.length_valid = 0x1;
365 data->length = reclen; /* not tlf, as one might think */
366 data->operation.operation = 0x3F;
367 data->extended_operation = 0x23;
368 break;
369 case DASD_ECKD_CCW_READ:
370 case DASD_ECKD_CCW_READ_MT:
371 case DASD_ECKD_CCW_READ_KD:
372 case DASD_ECKD_CCW_READ_KD_MT:
373 data->auxiliary.length_valid = 0x1;
374 data->length = reclen;
375 data->operation.operation = 0x06;
376 break;
377 case DASD_ECKD_CCW_READ_CKD:
378 case DASD_ECKD_CCW_READ_CKD_MT:
379 data->auxiliary.length_valid = 0x1;
380 data->length = reclen;
381 data->operation.operation = 0x16;
382 break;
383 case DASD_ECKD_CCW_READ_COUNT:
384 data->operation.operation = 0x06;
385 break;
386 case DASD_ECKD_CCW_READ_TRACK_DATA:
387 data->auxiliary.length_valid = 0x1;
388 data->length = tlf;
389 data->operation.operation = 0x0C;
390 break;
391 case DASD_ECKD_CCW_ERASE:
392 data->length = reclen;
393 data->auxiliary.length_valid = 0x1;
394 data->operation.operation = 0x0b;
395 break;
396 default:
397 DBF_DEV_EVENT(DBF_ERR, device,
398 "fill LRE unknown opcode 0x%x", cmd);
399 BUG();
400 }
401 set_ch_t(&data->seek_addr,
402 trk / private->rdc_data.trk_per_cyl,
403 trk % private->rdc_data.trk_per_cyl);
404 data->search_arg.cyl = data->seek_addr.cyl;
405 data->search_arg.head = data->seek_addr.head;
406 data->search_arg.record = rec_on_trk;
407 }
408
409 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
410 unsigned int trk, unsigned int totrk, int cmd,
411 struct dasd_device *basedev, struct dasd_device *startdev,
412 unsigned char format, unsigned int rec_on_trk, int count,
413 unsigned int blksize, unsigned int tlf)
414 {
415 struct dasd_eckd_private *basepriv, *startpriv;
416 struct DE_eckd_data *dedata;
417 struct LRE_eckd_data *lredata;
418 u32 begcyl, endcyl;
419 u16 heads, beghead, endhead;
420 int rc = 0;
421
422 basepriv = (struct dasd_eckd_private *) basedev->private;
423 startpriv = (struct dasd_eckd_private *) startdev->private;
424 dedata = &pfxdata->define_extent;
425 lredata = &pfxdata->locate_record;
426
427 ccw->cmd_code = DASD_ECKD_CCW_PFX;
428 ccw->flags = 0;
429 ccw->count = sizeof(*pfxdata);
430 ccw->cda = (__u32) __pa(pfxdata);
431
432 memset(pfxdata, 0, sizeof(*pfxdata));
433 /* prefix data */
434 if (format > 1) {
435 DBF_DEV_EVENT(DBF_ERR, basedev,
436 "PFX LRE unknown format 0x%x", format);
437 BUG();
438 return -EINVAL;
439 }
440 pfxdata->format = format;
441 pfxdata->base_address = basepriv->ned->unit_addr;
442 pfxdata->base_lss = basepriv->ned->ID;
443 pfxdata->validity.define_extent = 1;
444
445 /* private uid is kept up to date, conf_data may be outdated */
446 if (startpriv->uid.type != UA_BASE_DEVICE) {
447 pfxdata->validity.verify_base = 1;
448 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
449 pfxdata->validity.hyper_pav = 1;
450 }
451
452 /* define extend data (mostly)*/
453 switch (cmd) {
454 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
455 case DASD_ECKD_CCW_READ_RECORD_ZERO:
456 case DASD_ECKD_CCW_READ:
457 case DASD_ECKD_CCW_READ_MT:
458 case DASD_ECKD_CCW_READ_CKD:
459 case DASD_ECKD_CCW_READ_CKD_MT:
460 case DASD_ECKD_CCW_READ_KD:
461 case DASD_ECKD_CCW_READ_KD_MT:
462 case DASD_ECKD_CCW_READ_COUNT:
463 dedata->mask.perm = 0x1;
464 dedata->attributes.operation = basepriv->attrib.operation;
465 break;
466 case DASD_ECKD_CCW_READ_TRACK_DATA:
467 dedata->mask.perm = 0x1;
468 dedata->attributes.operation = basepriv->attrib.operation;
469 dedata->blk_size = 0;
470 break;
471 case DASD_ECKD_CCW_WRITE:
472 case DASD_ECKD_CCW_WRITE_MT:
473 case DASD_ECKD_CCW_WRITE_KD:
474 case DASD_ECKD_CCW_WRITE_KD_MT:
475 dedata->mask.perm = 0x02;
476 dedata->attributes.operation = basepriv->attrib.operation;
477 rc = check_XRC_on_prefix(pfxdata, basedev);
478 break;
479 case DASD_ECKD_CCW_WRITE_CKD:
480 case DASD_ECKD_CCW_WRITE_CKD_MT:
481 dedata->attributes.operation = DASD_BYPASS_CACHE;
482 rc = check_XRC_on_prefix(pfxdata, basedev);
483 break;
484 case DASD_ECKD_CCW_ERASE:
485 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
486 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
487 dedata->mask.perm = 0x3;
488 dedata->mask.auth = 0x1;
489 dedata->attributes.operation = DASD_BYPASS_CACHE;
490 rc = check_XRC_on_prefix(pfxdata, basedev);
491 break;
492 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
493 dedata->mask.perm = 0x02;
494 dedata->attributes.operation = basepriv->attrib.operation;
495 dedata->blk_size = blksize;
496 rc = check_XRC_on_prefix(pfxdata, basedev);
497 break;
498 default:
499 DBF_DEV_EVENT(DBF_ERR, basedev,
500 "PFX LRE unknown opcode 0x%x", cmd);
501 BUG();
502 return -EINVAL;
503 }
504
505 dedata->attributes.mode = 0x3; /* ECKD */
506
507 if ((basepriv->rdc_data.cu_type == 0x2105 ||
508 basepriv->rdc_data.cu_type == 0x2107 ||
509 basepriv->rdc_data.cu_type == 0x1750)
510 && !(basepriv->uses_cdl && trk < 2))
511 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
512
513 heads = basepriv->rdc_data.trk_per_cyl;
514 begcyl = trk / heads;
515 beghead = trk % heads;
516 endcyl = totrk / heads;
517 endhead = totrk % heads;
518
519 /* check for sequential prestage - enhance cylinder range */
520 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
521 dedata->attributes.operation == DASD_SEQ_ACCESS) {
522
523 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
524 endcyl += basepriv->attrib.nr_cyl;
525 else
526 endcyl = (basepriv->real_cyl - 1);
527 }
528
529 set_ch_t(&dedata->beg_ext, begcyl, beghead);
530 set_ch_t(&dedata->end_ext, endcyl, endhead);
531
532 if (format == 1) {
533 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
534 basedev, blksize, tlf);
535 }
536
537 return rc;
538 }
539
540 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
541 unsigned int trk, unsigned int totrk, int cmd,
542 struct dasd_device *basedev, struct dasd_device *startdev)
543 {
544 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
545 0, 0, 0, 0, 0);
546 }
547
548 static void
549 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
550 unsigned int rec_on_trk, int no_rec, int cmd,
551 struct dasd_device * device, int reclen)
552 {
553 struct dasd_eckd_private *private;
554 int sector;
555 int dn, d;
556
557 private = (struct dasd_eckd_private *) device->private;
558
559 DBF_DEV_EVENT(DBF_INFO, device,
560 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
561 trk, rec_on_trk, no_rec, cmd, reclen);
562
563 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
564 ccw->flags = 0;
565 ccw->count = 16;
566 ccw->cda = (__u32) __pa(data);
567
568 memset(data, 0, sizeof(struct LO_eckd_data));
569 sector = 0;
570 if (rec_on_trk) {
571 switch (private->rdc_data.dev_type) {
572 case 0x3390:
573 dn = ceil_quot(reclen + 6, 232);
574 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
575 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
576 break;
577 case 0x3380:
578 d = 7 + ceil_quot(reclen + 12, 32);
579 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
580 break;
581 }
582 }
583 data->sector = sector;
584 data->count = no_rec;
585 switch (cmd) {
586 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
587 data->operation.orientation = 0x3;
588 data->operation.operation = 0x03;
589 break;
590 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
591 data->operation.orientation = 0x3;
592 data->operation.operation = 0x16;
593 break;
594 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
595 data->operation.orientation = 0x1;
596 data->operation.operation = 0x03;
597 data->count++;
598 break;
599 case DASD_ECKD_CCW_READ_RECORD_ZERO:
600 data->operation.orientation = 0x3;
601 data->operation.operation = 0x16;
602 data->count++;
603 break;
604 case DASD_ECKD_CCW_WRITE:
605 case DASD_ECKD_CCW_WRITE_MT:
606 case DASD_ECKD_CCW_WRITE_KD:
607 case DASD_ECKD_CCW_WRITE_KD_MT:
608 data->auxiliary.last_bytes_used = 0x1;
609 data->length = reclen;
610 data->operation.operation = 0x01;
611 break;
612 case DASD_ECKD_CCW_WRITE_CKD:
613 case DASD_ECKD_CCW_WRITE_CKD_MT:
614 data->auxiliary.last_bytes_used = 0x1;
615 data->length = reclen;
616 data->operation.operation = 0x03;
617 break;
618 case DASD_ECKD_CCW_READ:
619 case DASD_ECKD_CCW_READ_MT:
620 case DASD_ECKD_CCW_READ_KD:
621 case DASD_ECKD_CCW_READ_KD_MT:
622 data->auxiliary.last_bytes_used = 0x1;
623 data->length = reclen;
624 data->operation.operation = 0x06;
625 break;
626 case DASD_ECKD_CCW_READ_CKD:
627 case DASD_ECKD_CCW_READ_CKD_MT:
628 data->auxiliary.last_bytes_used = 0x1;
629 data->length = reclen;
630 data->operation.operation = 0x16;
631 break;
632 case DASD_ECKD_CCW_READ_COUNT:
633 data->operation.operation = 0x06;
634 break;
635 case DASD_ECKD_CCW_ERASE:
636 data->length = reclen;
637 data->auxiliary.last_bytes_used = 0x1;
638 data->operation.operation = 0x0b;
639 break;
640 default:
641 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
642 "opcode 0x%x", cmd);
643 }
644 set_ch_t(&data->seek_addr,
645 trk / private->rdc_data.trk_per_cyl,
646 trk % private->rdc_data.trk_per_cyl);
647 data->search_arg.cyl = data->seek_addr.cyl;
648 data->search_arg.head = data->seek_addr.head;
649 data->search_arg.record = rec_on_trk;
650 }
651
652 /*
653 * Returns 1 if the block is one of the special blocks that needs
654 * to get read/written with the KD variant of the command.
655 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
656 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
657 * Luckily the KD variants differ only by one bit (0x08) from the
658 * normal variant. So don't wonder about code like:
659 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
660 * ccw->cmd_code |= 0x8;
661 */
662 static inline int
663 dasd_eckd_cdl_special(int blk_per_trk, int recid)
664 {
665 if (recid < 3)
666 return 1;
667 if (recid < blk_per_trk)
668 return 0;
669 if (recid < 2 * blk_per_trk)
670 return 1;
671 return 0;
672 }
673
674 /*
675 * Returns the record size for the special blocks of the cdl format.
676 * Only returns something useful if dasd_eckd_cdl_special is true
677 * for the recid.
678 */
679 static inline int
680 dasd_eckd_cdl_reclen(int recid)
681 {
682 if (recid < 3)
683 return sizes_trk0[recid];
684 return LABEL_SIZE;
685 }
686
687 /*
688 * Generate device unique id that specifies the physical device.
689 */
690 static int dasd_eckd_generate_uid(struct dasd_device *device,
691 struct dasd_uid *uid)
692 {
693 struct dasd_eckd_private *private;
694 int count;
695
696 private = (struct dasd_eckd_private *) device->private;
697 if (!private)
698 return -ENODEV;
699 if (!private->ned || !private->gneq)
700 return -ENODEV;
701
702 memset(uid, 0, sizeof(struct dasd_uid));
703 memcpy(uid->vendor, private->ned->HDA_manufacturer,
704 sizeof(uid->vendor) - 1);
705 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
706 memcpy(uid->serial, private->ned->HDA_location,
707 sizeof(uid->serial) - 1);
708 EBCASC(uid->serial, sizeof(uid->serial) - 1);
709 uid->ssid = private->gneq->subsystemID;
710 uid->real_unit_addr = private->ned->unit_addr;
711 if (private->sneq) {
712 uid->type = private->sneq->sua_flags;
713 if (uid->type == UA_BASE_PAV_ALIAS)
714 uid->base_unit_addr = private->sneq->base_unit_addr;
715 } else {
716 uid->type = UA_BASE_DEVICE;
717 }
718 if (private->vdsneq) {
719 for (count = 0; count < 16; count++) {
720 sprintf(uid->vduit+2*count, "%02x",
721 private->vdsneq->uit[count]);
722 }
723 }
724 return 0;
725 }
726
727 static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
728 void *rcd_buffer,
729 struct ciw *ciw, __u8 lpm)
730 {
731 struct dasd_ccw_req *cqr;
732 struct ccw1 *ccw;
733
734 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count,
735 device);
736
737 if (IS_ERR(cqr)) {
738 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
739 "Could not allocate RCD request");
740 return cqr;
741 }
742
743 ccw = cqr->cpaddr;
744 ccw->cmd_code = ciw->cmd;
745 ccw->cda = (__u32)(addr_t)rcd_buffer;
746 ccw->count = ciw->count;
747
748 cqr->startdev = device;
749 cqr->memdev = device;
750 cqr->block = NULL;
751 cqr->expires = 10*HZ;
752 cqr->lpm = lpm;
753 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
754 cqr->retries = 2;
755 cqr->buildclk = get_clock();
756 cqr->status = DASD_CQR_FILLED;
757 return cqr;
758 }
759
760 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
761 void **rcd_buffer,
762 int *rcd_buffer_size, __u8 lpm)
763 {
764 struct ciw *ciw;
765 char *rcd_buf = NULL;
766 int ret;
767 struct dasd_ccw_req *cqr;
768
769 /*
770 * scan for RCD command in extended SenseID data
771 */
772 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
773 if (!ciw || ciw->cmd == 0) {
774 ret = -EOPNOTSUPP;
775 goto out_error;
776 }
777 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
778 if (!rcd_buf) {
779 ret = -ENOMEM;
780 goto out_error;
781 }
782
783 /*
784 * buffer has to start with EBCDIC "V1.0" to show
785 * support for virtual device SNEQ
786 */
787 rcd_buf[0] = 0xE5;
788 rcd_buf[1] = 0xF1;
789 rcd_buf[2] = 0x4B;
790 rcd_buf[3] = 0xF0;
791 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
792 if (IS_ERR(cqr)) {
793 ret = PTR_ERR(cqr);
794 goto out_error;
795 }
796 ret = dasd_sleep_on(cqr);
797 /*
798 * on success we update the user input parms
799 */
800 dasd_sfree_request(cqr, cqr->memdev);
801 if (ret)
802 goto out_error;
803
804 *rcd_buffer_size = ciw->count;
805 *rcd_buffer = rcd_buf;
806 return 0;
807 out_error:
808 kfree(rcd_buf);
809 *rcd_buffer = NULL;
810 *rcd_buffer_size = 0;
811 return ret;
812 }
813
814 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
815 {
816
817 struct dasd_sneq *sneq;
818 int i, count;
819
820 private->ned = NULL;
821 private->sneq = NULL;
822 private->vdsneq = NULL;
823 private->gneq = NULL;
824 count = private->conf_len / sizeof(struct dasd_sneq);
825 sneq = (struct dasd_sneq *)private->conf_data;
826 for (i = 0; i < count; ++i) {
827 if (sneq->flags.identifier == 1 && sneq->format == 1)
828 private->sneq = sneq;
829 else if (sneq->flags.identifier == 1 && sneq->format == 4)
830 private->vdsneq = (struct vd_sneq *)sneq;
831 else if (sneq->flags.identifier == 2)
832 private->gneq = (struct dasd_gneq *)sneq;
833 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
834 private->ned = (struct dasd_ned *)sneq;
835 sneq++;
836 }
837 if (!private->ned || !private->gneq) {
838 private->ned = NULL;
839 private->sneq = NULL;
840 private->vdsneq = NULL;
841 private->gneq = NULL;
842 return -EINVAL;
843 }
844 return 0;
845
846 };
847
848 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
849 {
850 struct dasd_gneq *gneq;
851 int i, count, found;
852
853 count = conf_len / sizeof(*gneq);
854 gneq = (struct dasd_gneq *)conf_data;
855 found = 0;
856 for (i = 0; i < count; ++i) {
857 if (gneq->flags.identifier == 2) {
858 found = 1;
859 break;
860 }
861 gneq++;
862 }
863 if (found)
864 return ((char *)gneq)[18] & 0x07;
865 else
866 return 0;
867 }
868
869 static int dasd_eckd_read_conf(struct dasd_device *device)
870 {
871 void *conf_data;
872 int conf_len, conf_data_saved;
873 int rc;
874 __u8 lpm;
875 struct dasd_eckd_private *private;
876 struct dasd_eckd_path *path_data;
877
878 private = (struct dasd_eckd_private *) device->private;
879 path_data = (struct dasd_eckd_path *) &private->path_data;
880 path_data->opm = ccw_device_get_path_mask(device->cdev);
881 lpm = 0x80;
882 conf_data_saved = 0;
883 /* get configuration data per operational path */
884 for (lpm = 0x80; lpm; lpm>>= 1) {
885 if (lpm & path_data->opm){
886 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
887 &conf_len, lpm);
888 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
889 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
890 "Read configuration data returned "
891 "error %d", rc);
892 return rc;
893 }
894 if (conf_data == NULL) {
895 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
896 "No configuration data "
897 "retrieved");
898 continue; /* no error */
899 }
900 /* save first valid configuration data */
901 if (!conf_data_saved) {
902 kfree(private->conf_data);
903 private->conf_data = conf_data;
904 private->conf_len = conf_len;
905 if (dasd_eckd_identify_conf_parts(private)) {
906 private->conf_data = NULL;
907 private->conf_len = 0;
908 kfree(conf_data);
909 continue;
910 }
911 conf_data_saved++;
912 }
913 switch (dasd_eckd_path_access(conf_data, conf_len)) {
914 case 0x02:
915 path_data->npm |= lpm;
916 break;
917 case 0x03:
918 path_data->ppm |= lpm;
919 break;
920 }
921 if (conf_data != private->conf_data)
922 kfree(conf_data);
923 }
924 }
925 return 0;
926 }
927
928 static int dasd_eckd_read_features(struct dasd_device *device)
929 {
930 struct dasd_psf_prssd_data *prssdp;
931 struct dasd_rssd_features *features;
932 struct dasd_ccw_req *cqr;
933 struct ccw1 *ccw;
934 int rc;
935 struct dasd_eckd_private *private;
936
937 private = (struct dasd_eckd_private *) device->private;
938 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
939 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
940 (sizeof(struct dasd_psf_prssd_data) +
941 sizeof(struct dasd_rssd_features)),
942 device);
943 if (IS_ERR(cqr)) {
944 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
945 "allocate initialization request");
946 return PTR_ERR(cqr);
947 }
948 cqr->startdev = device;
949 cqr->memdev = device;
950 cqr->block = NULL;
951 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
952 cqr->retries = 5;
953 cqr->expires = 10 * HZ;
954
955 /* Prepare for Read Subsystem Data */
956 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
957 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
958 prssdp->order = PSF_ORDER_PRSSD;
959 prssdp->suborder = 0x41; /* Read Feature Codes */
960 /* all other bytes of prssdp must be zero */
961
962 ccw = cqr->cpaddr;
963 ccw->cmd_code = DASD_ECKD_CCW_PSF;
964 ccw->count = sizeof(struct dasd_psf_prssd_data);
965 ccw->flags |= CCW_FLAG_CC;
966 ccw->cda = (__u32)(addr_t) prssdp;
967
968 /* Read Subsystem Data - feature codes */
969 features = (struct dasd_rssd_features *) (prssdp + 1);
970 memset(features, 0, sizeof(struct dasd_rssd_features));
971
972 ccw++;
973 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
974 ccw->count = sizeof(struct dasd_rssd_features);
975 ccw->cda = (__u32)(addr_t) features;
976
977 cqr->buildclk = get_clock();
978 cqr->status = DASD_CQR_FILLED;
979 rc = dasd_sleep_on(cqr);
980 if (rc == 0) {
981 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
982 features = (struct dasd_rssd_features *) (prssdp + 1);
983 memcpy(&private->features, features,
984 sizeof(struct dasd_rssd_features));
985 } else
986 dev_warn(&device->cdev->dev, "Reading device feature codes"
987 " failed with rc=%d\n", rc);
988 dasd_sfree_request(cqr, cqr->memdev);
989 return rc;
990 }
991
992
993 /*
994 * Build CP for Perform Subsystem Function - SSC.
995 */
996 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
997 int enable_pav)
998 {
999 struct dasd_ccw_req *cqr;
1000 struct dasd_psf_ssc_data *psf_ssc_data;
1001 struct ccw1 *ccw;
1002
1003 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1004 sizeof(struct dasd_psf_ssc_data),
1005 device);
1006
1007 if (IS_ERR(cqr)) {
1008 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1009 "Could not allocate PSF-SSC request");
1010 return cqr;
1011 }
1012 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1013 psf_ssc_data->order = PSF_ORDER_SSC;
1014 psf_ssc_data->suborder = 0x40;
1015 if (enable_pav) {
1016 psf_ssc_data->suborder |= 0x88;
1017 psf_ssc_data->reserved[0] = 0x88;
1018 }
1019 ccw = cqr->cpaddr;
1020 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1021 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1022 ccw->count = 66;
1023
1024 cqr->startdev = device;
1025 cqr->memdev = device;
1026 cqr->block = NULL;
1027 cqr->expires = 10*HZ;
1028 cqr->buildclk = get_clock();
1029 cqr->status = DASD_CQR_FILLED;
1030 return cqr;
1031 }
1032
1033 /*
1034 * Perform Subsystem Function.
1035 * It is necessary to trigger CIO for channel revalidation since this
1036 * call might change behaviour of DASD devices.
1037 */
1038 static int
1039 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
1040 {
1041 struct dasd_ccw_req *cqr;
1042 int rc;
1043
1044 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1045 if (IS_ERR(cqr))
1046 return PTR_ERR(cqr);
1047
1048 rc = dasd_sleep_on(cqr);
1049 if (!rc)
1050 /* trigger CIO to reprobe devices */
1051 css_schedule_reprobe();
1052 dasd_sfree_request(cqr, cqr->memdev);
1053 return rc;
1054 }
1055
1056 /*
1057 * Valide storage server of current device.
1058 */
1059 static int dasd_eckd_validate_server(struct dasd_device *device)
1060 {
1061 int rc;
1062 struct dasd_eckd_private *private;
1063 int enable_pav;
1064
1065 if (dasd_nopav || MACHINE_IS_VM)
1066 enable_pav = 0;
1067 else
1068 enable_pav = 1;
1069 rc = dasd_eckd_psf_ssc(device, enable_pav);
1070 /* may be requested feature is not available on server,
1071 * therefore just report error and go ahead */
1072 private = (struct dasd_eckd_private *) device->private;
1073 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1074 "returned rc=%d", private->uid.ssid, rc);
1075 /* RE-Read Configuration Data */
1076 return dasd_eckd_read_conf(device);
1077 }
1078
1079 /*
1080 * Check device characteristics.
1081 * If the device is accessible using ECKD discipline, the device is enabled.
1082 */
1083 static int
1084 dasd_eckd_check_characteristics(struct dasd_device *device)
1085 {
1086 struct dasd_eckd_private *private;
1087 struct dasd_block *block;
1088 int is_known, rc;
1089
1090 private = (struct dasd_eckd_private *) device->private;
1091 if (!private) {
1092 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1093 if (!private) {
1094 dev_warn(&device->cdev->dev,
1095 "Allocating memory for private DASD data "
1096 "failed\n");
1097 return -ENOMEM;
1098 }
1099 device->private = (void *) private;
1100 } else {
1101 memset(private, 0, sizeof(*private));
1102 }
1103 /* Invalidate status of initial analysis. */
1104 private->init_cqr_status = -1;
1105 /* Set default cache operations. */
1106 private->attrib.operation = DASD_NORMAL_CACHE;
1107 private->attrib.nr_cyl = 0;
1108
1109 /* Read Configuration Data */
1110 rc = dasd_eckd_read_conf(device);
1111 if (rc)
1112 goto out_err1;
1113
1114 /* Generate device unique id and register in devmap */
1115 rc = dasd_eckd_generate_uid(device, &private->uid);
1116 if (rc)
1117 goto out_err1;
1118 dasd_set_uid(device->cdev, &private->uid);
1119
1120 if (private->uid.type == UA_BASE_DEVICE) {
1121 block = dasd_alloc_block();
1122 if (IS_ERR(block)) {
1123 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1124 "could not allocate dasd "
1125 "block structure");
1126 rc = PTR_ERR(block);
1127 goto out_err1;
1128 }
1129 device->block = block;
1130 block->base = device;
1131 }
1132
1133 /* register lcu with alias handling, enable PAV if this is a new lcu */
1134 is_known = dasd_alias_make_device_known_to_lcu(device);
1135 if (is_known < 0) {
1136 rc = is_known;
1137 goto out_err2;
1138 }
1139 if (!is_known) {
1140 /* new lcu found */
1141 rc = dasd_eckd_validate_server(device); /* will switch pav on */
1142 if (rc)
1143 goto out_err3;
1144 }
1145
1146 /* Read Feature Codes */
1147 dasd_eckd_read_features(device);
1148
1149 /* Read Device Characteristics */
1150 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1151 &private->rdc_data, 64);
1152 if (rc) {
1153 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1154 "Read device characteristic failed, rc=%d", rc);
1155 goto out_err3;
1156 }
1157 /* find the vaild cylinder size */
1158 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1159 private->rdc_data.long_no_cyl)
1160 private->real_cyl = private->rdc_data.long_no_cyl;
1161 else
1162 private->real_cyl = private->rdc_data.no_cyl;
1163
1164 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1165 "with %d cylinders, %d heads, %d sectors\n",
1166 private->rdc_data.dev_type,
1167 private->rdc_data.dev_model,
1168 private->rdc_data.cu_type,
1169 private->rdc_data.cu_model.model,
1170 private->real_cyl,
1171 private->rdc_data.trk_per_cyl,
1172 private->rdc_data.sec_per_trk);
1173 return 0;
1174
1175 out_err3:
1176 dasd_alias_disconnect_device_from_lcu(device);
1177 out_err2:
1178 dasd_free_block(device->block);
1179 device->block = NULL;
1180 out_err1:
1181 kfree(private->conf_data);
1182 kfree(device->private);
1183 device->private = NULL;
1184 return rc;
1185 }
1186
1187 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1188 {
1189 struct dasd_eckd_private *private;
1190
1191 private = (struct dasd_eckd_private *) device->private;
1192 dasd_alias_disconnect_device_from_lcu(device);
1193 private->ned = NULL;
1194 private->sneq = NULL;
1195 private->vdsneq = NULL;
1196 private->gneq = NULL;
1197 private->conf_len = 0;
1198 kfree(private->conf_data);
1199 private->conf_data = NULL;
1200 }
1201
1202 static struct dasd_ccw_req *
1203 dasd_eckd_analysis_ccw(struct dasd_device *device)
1204 {
1205 struct dasd_eckd_private *private;
1206 struct eckd_count *count_data;
1207 struct LO_eckd_data *LO_data;
1208 struct dasd_ccw_req *cqr;
1209 struct ccw1 *ccw;
1210 int cplength, datasize;
1211 int i;
1212
1213 private = (struct dasd_eckd_private *) device->private;
1214
1215 cplength = 8;
1216 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1217 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1218 if (IS_ERR(cqr))
1219 return cqr;
1220 ccw = cqr->cpaddr;
1221 /* Define extent for the first 3 tracks. */
1222 define_extent(ccw++, cqr->data, 0, 2,
1223 DASD_ECKD_CCW_READ_COUNT, device);
1224 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1225 /* Locate record for the first 4 records on track 0. */
1226 ccw[-1].flags |= CCW_FLAG_CC;
1227 locate_record(ccw++, LO_data++, 0, 0, 4,
1228 DASD_ECKD_CCW_READ_COUNT, device, 0);
1229
1230 count_data = private->count_area;
1231 for (i = 0; i < 4; i++) {
1232 ccw[-1].flags |= CCW_FLAG_CC;
1233 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1234 ccw->flags = 0;
1235 ccw->count = 8;
1236 ccw->cda = (__u32)(addr_t) count_data;
1237 ccw++;
1238 count_data++;
1239 }
1240
1241 /* Locate record for the first record on track 2. */
1242 ccw[-1].flags |= CCW_FLAG_CC;
1243 locate_record(ccw++, LO_data++, 2, 0, 1,
1244 DASD_ECKD_CCW_READ_COUNT, device, 0);
1245 /* Read count ccw. */
1246 ccw[-1].flags |= CCW_FLAG_CC;
1247 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1248 ccw->flags = 0;
1249 ccw->count = 8;
1250 ccw->cda = (__u32)(addr_t) count_data;
1251
1252 cqr->block = NULL;
1253 cqr->startdev = device;
1254 cqr->memdev = device;
1255 cqr->retries = 0;
1256 cqr->buildclk = get_clock();
1257 cqr->status = DASD_CQR_FILLED;
1258 return cqr;
1259 }
1260
1261 /*
1262 * This is the callback function for the init_analysis cqr. It saves
1263 * the status of the initial analysis ccw before it frees it and kicks
1264 * the device to continue the startup sequence. This will call
1265 * dasd_eckd_do_analysis again (if the devices has not been marked
1266 * for deletion in the meantime).
1267 */
1268 static void
1269 dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data)
1270 {
1271 struct dasd_eckd_private *private;
1272 struct dasd_device *device;
1273
1274 device = init_cqr->startdev;
1275 private = (struct dasd_eckd_private *) device->private;
1276 private->init_cqr_status = init_cqr->status;
1277 dasd_sfree_request(init_cqr, device);
1278 dasd_kick_device(device);
1279 }
1280
1281 static int
1282 dasd_eckd_start_analysis(struct dasd_block *block)
1283 {
1284 struct dasd_eckd_private *private;
1285 struct dasd_ccw_req *init_cqr;
1286
1287 private = (struct dasd_eckd_private *) block->base->private;
1288 init_cqr = dasd_eckd_analysis_ccw(block->base);
1289 if (IS_ERR(init_cqr))
1290 return PTR_ERR(init_cqr);
1291 init_cqr->callback = dasd_eckd_analysis_callback;
1292 init_cqr->callback_data = NULL;
1293 init_cqr->expires = 5*HZ;
1294 dasd_add_request_head(init_cqr);
1295 return -EAGAIN;
1296 }
1297
1298 static int
1299 dasd_eckd_end_analysis(struct dasd_block *block)
1300 {
1301 struct dasd_device *device;
1302 struct dasd_eckd_private *private;
1303 struct eckd_count *count_area;
1304 unsigned int sb, blk_per_trk;
1305 int status, i;
1306
1307 device = block->base;
1308 private = (struct dasd_eckd_private *) device->private;
1309 status = private->init_cqr_status;
1310 private->init_cqr_status = -1;
1311 if (status != DASD_CQR_DONE) {
1312 dev_warn(&device->cdev->dev,
1313 "The DASD is not formatted\n");
1314 return -EMEDIUMTYPE;
1315 }
1316
1317 private->uses_cdl = 1;
1318 /* Check Track 0 for Compatible Disk Layout */
1319 count_area = NULL;
1320 for (i = 0; i < 3; i++) {
1321 if (private->count_area[i].kl != 4 ||
1322 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1323 private->uses_cdl = 0;
1324 break;
1325 }
1326 }
1327 if (i == 3)
1328 count_area = &private->count_area[4];
1329
1330 if (private->uses_cdl == 0) {
1331 for (i = 0; i < 5; i++) {
1332 if ((private->count_area[i].kl != 0) ||
1333 (private->count_area[i].dl !=
1334 private->count_area[0].dl))
1335 break;
1336 }
1337 if (i == 5)
1338 count_area = &private->count_area[0];
1339 } else {
1340 if (private->count_area[3].record == 1)
1341 dev_warn(&device->cdev->dev,
1342 "Track 0 has no records following the VTOC\n");
1343 }
1344 if (count_area != NULL && count_area->kl == 0) {
1345 /* we found notthing violating our disk layout */
1346 if (dasd_check_blocksize(count_area->dl) == 0)
1347 block->bp_block = count_area->dl;
1348 }
1349 if (block->bp_block == 0) {
1350 dev_warn(&device->cdev->dev,
1351 "The disk layout of the DASD is not supported\n");
1352 return -EMEDIUMTYPE;
1353 }
1354 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1355 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1356 block->s2b_shift++;
1357
1358 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
1359 block->blocks = (private->real_cyl *
1360 private->rdc_data.trk_per_cyl *
1361 blk_per_trk);
1362
1363 dev_info(&device->cdev->dev,
1364 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1365 "%s\n", (block->bp_block >> 10),
1366 ((private->real_cyl *
1367 private->rdc_data.trk_per_cyl *
1368 blk_per_trk * (block->bp_block >> 9)) >> 1),
1369 ((blk_per_trk * block->bp_block) >> 10),
1370 private->uses_cdl ?
1371 "compatible disk layout" : "linux disk layout");
1372
1373 return 0;
1374 }
1375
1376 static int dasd_eckd_do_analysis(struct dasd_block *block)
1377 {
1378 struct dasd_eckd_private *private;
1379
1380 private = (struct dasd_eckd_private *) block->base->private;
1381 if (private->init_cqr_status < 0)
1382 return dasd_eckd_start_analysis(block);
1383 else
1384 return dasd_eckd_end_analysis(block);
1385 }
1386
1387 static int dasd_eckd_ready_to_online(struct dasd_device *device)
1388 {
1389 return dasd_alias_add_device(device);
1390 };
1391
1392 static int dasd_eckd_online_to_ready(struct dasd_device *device)
1393 {
1394 return dasd_alias_remove_device(device);
1395 };
1396
1397 static int
1398 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1399 {
1400 struct dasd_eckd_private *private;
1401
1402 private = (struct dasd_eckd_private *) block->base->private;
1403 if (dasd_check_blocksize(block->bp_block) == 0) {
1404 geo->sectors = recs_per_track(&private->rdc_data,
1405 0, block->bp_block);
1406 }
1407 geo->cylinders = private->rdc_data.no_cyl;
1408 geo->heads = private->rdc_data.trk_per_cyl;
1409 return 0;
1410 }
1411
1412 static struct dasd_ccw_req *
1413 dasd_eckd_format_device(struct dasd_device * device,
1414 struct format_data_t * fdata)
1415 {
1416 struct dasd_eckd_private *private;
1417 struct dasd_ccw_req *fcp;
1418 struct eckd_count *ect;
1419 struct ccw1 *ccw;
1420 void *data;
1421 int rpt;
1422 struct ch_t address;
1423 int cplength, datasize;
1424 int i;
1425 int intensity = 0;
1426 int r0_perm;
1427
1428 private = (struct dasd_eckd_private *) device->private;
1429 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
1430 set_ch_t(&address,
1431 fdata->start_unit / private->rdc_data.trk_per_cyl,
1432 fdata->start_unit % private->rdc_data.trk_per_cyl);
1433
1434 /* Sanity checks. */
1435 if (fdata->start_unit >=
1436 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
1437 dev_warn(&device->cdev->dev, "Start track number %d used in "
1438 "formatting is too big\n", fdata->start_unit);
1439 return ERR_PTR(-EINVAL);
1440 }
1441 if (fdata->start_unit > fdata->stop_unit) {
1442 dev_warn(&device->cdev->dev, "Start track %d used in "
1443 "formatting exceeds end track\n", fdata->start_unit);
1444 return ERR_PTR(-EINVAL);
1445 }
1446 if (dasd_check_blocksize(fdata->blksize) != 0) {
1447 dev_warn(&device->cdev->dev,
1448 "The DASD cannot be formatted with block size %d\n",
1449 fdata->blksize);
1450 return ERR_PTR(-EINVAL);
1451 }
1452
1453 /*
1454 * fdata->intensity is a bit string that tells us what to do:
1455 * Bit 0: write record zero
1456 * Bit 1: write home address, currently not supported
1457 * Bit 2: invalidate tracks
1458 * Bit 3: use OS/390 compatible disk layout (cdl)
1459 * Bit 4: do not allow storage subsystem to modify record zero
1460 * Only some bit combinations do make sense.
1461 */
1462 if (fdata->intensity & 0x10) {
1463 r0_perm = 0;
1464 intensity = fdata->intensity & ~0x10;
1465 } else {
1466 r0_perm = 1;
1467 intensity = fdata->intensity;
1468 }
1469 switch (intensity) {
1470 case 0x00: /* Normal format */
1471 case 0x08: /* Normal format, use cdl. */
1472 cplength = 2 + rpt;
1473 datasize = sizeof(struct DE_eckd_data) +
1474 sizeof(struct LO_eckd_data) +
1475 rpt * sizeof(struct eckd_count);
1476 break;
1477 case 0x01: /* Write record zero and format track. */
1478 case 0x09: /* Write record zero and format track, use cdl. */
1479 cplength = 3 + rpt;
1480 datasize = sizeof(struct DE_eckd_data) +
1481 sizeof(struct LO_eckd_data) +
1482 sizeof(struct eckd_count) +
1483 rpt * sizeof(struct eckd_count);
1484 break;
1485 case 0x04: /* Invalidate track. */
1486 case 0x0c: /* Invalidate track, use cdl. */
1487 cplength = 3;
1488 datasize = sizeof(struct DE_eckd_data) +
1489 sizeof(struct LO_eckd_data) +
1490 sizeof(struct eckd_count);
1491 break;
1492 default:
1493 dev_warn(&device->cdev->dev, "An I/O control call used "
1494 "incorrect flags 0x%x\n", fdata->intensity);
1495 return ERR_PTR(-EINVAL);
1496 }
1497 /* Allocate the format ccw request. */
1498 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1499 if (IS_ERR(fcp))
1500 return fcp;
1501
1502 data = fcp->data;
1503 ccw = fcp->cpaddr;
1504
1505 switch (intensity & ~0x08) {
1506 case 0x00: /* Normal format. */
1507 define_extent(ccw++, (struct DE_eckd_data *) data,
1508 fdata->start_unit, fdata->start_unit,
1509 DASD_ECKD_CCW_WRITE_CKD, device);
1510 /* grant subsystem permission to format R0 */
1511 if (r0_perm)
1512 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1513 data += sizeof(struct DE_eckd_data);
1514 ccw[-1].flags |= CCW_FLAG_CC;
1515 locate_record(ccw++, (struct LO_eckd_data *) data,
1516 fdata->start_unit, 0, rpt,
1517 DASD_ECKD_CCW_WRITE_CKD, device,
1518 fdata->blksize);
1519 data += sizeof(struct LO_eckd_data);
1520 break;
1521 case 0x01: /* Write record zero + format track. */
1522 define_extent(ccw++, (struct DE_eckd_data *) data,
1523 fdata->start_unit, fdata->start_unit,
1524 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1525 device);
1526 data += sizeof(struct DE_eckd_data);
1527 ccw[-1].flags |= CCW_FLAG_CC;
1528 locate_record(ccw++, (struct LO_eckd_data *) data,
1529 fdata->start_unit, 0, rpt + 1,
1530 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
1531 device->block->bp_block);
1532 data += sizeof(struct LO_eckd_data);
1533 break;
1534 case 0x04: /* Invalidate track. */
1535 define_extent(ccw++, (struct DE_eckd_data *) data,
1536 fdata->start_unit, fdata->start_unit,
1537 DASD_ECKD_CCW_WRITE_CKD, device);
1538 data += sizeof(struct DE_eckd_data);
1539 ccw[-1].flags |= CCW_FLAG_CC;
1540 locate_record(ccw++, (struct LO_eckd_data *) data,
1541 fdata->start_unit, 0, 1,
1542 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1543 data += sizeof(struct LO_eckd_data);
1544 break;
1545 }
1546 if (intensity & 0x01) { /* write record zero */
1547 ect = (struct eckd_count *) data;
1548 data += sizeof(struct eckd_count);
1549 ect->cyl = address.cyl;
1550 ect->head = address.head;
1551 ect->record = 0;
1552 ect->kl = 0;
1553 ect->dl = 8;
1554 ccw[-1].flags |= CCW_FLAG_CC;
1555 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1556 ccw->flags = CCW_FLAG_SLI;
1557 ccw->count = 8;
1558 ccw->cda = (__u32)(addr_t) ect;
1559 ccw++;
1560 }
1561 if ((intensity & ~0x08) & 0x04) { /* erase track */
1562 ect = (struct eckd_count *) data;
1563 data += sizeof(struct eckd_count);
1564 ect->cyl = address.cyl;
1565 ect->head = address.head;
1566 ect->record = 1;
1567 ect->kl = 0;
1568 ect->dl = 0;
1569 ccw[-1].flags |= CCW_FLAG_CC;
1570 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1571 ccw->flags = CCW_FLAG_SLI;
1572 ccw->count = 8;
1573 ccw->cda = (__u32)(addr_t) ect;
1574 } else { /* write remaining records */
1575 for (i = 0; i < rpt; i++) {
1576 ect = (struct eckd_count *) data;
1577 data += sizeof(struct eckd_count);
1578 ect->cyl = address.cyl;
1579 ect->head = address.head;
1580 ect->record = i + 1;
1581 ect->kl = 0;
1582 ect->dl = fdata->blksize;
1583 /* Check for special tracks 0-1 when formatting CDL */
1584 if ((intensity & 0x08) &&
1585 fdata->start_unit == 0) {
1586 if (i < 3) {
1587 ect->kl = 4;
1588 ect->dl = sizes_trk0[i] - 4;
1589 }
1590 }
1591 if ((intensity & 0x08) &&
1592 fdata->start_unit == 1) {
1593 ect->kl = 44;
1594 ect->dl = LABEL_SIZE - 44;
1595 }
1596 ccw[-1].flags |= CCW_FLAG_CC;
1597 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1598 ccw->flags = CCW_FLAG_SLI;
1599 ccw->count = 8;
1600 ccw->cda = (__u32)(addr_t) ect;
1601 ccw++;
1602 }
1603 }
1604 fcp->startdev = device;
1605 fcp->memdev = device;
1606 clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags);
1607 fcp->retries = 5; /* set retry counter to enable default ERP */
1608 fcp->buildclk = get_clock();
1609 fcp->status = DASD_CQR_FILLED;
1610 return fcp;
1611 }
1612
1613 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1614 {
1615 cqr->status = DASD_CQR_FILLED;
1616 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1617 dasd_eckd_reset_ccw_to_base_io(cqr);
1618 cqr->startdev = cqr->block->base;
1619 }
1620 };
1621
1622 static dasd_erp_fn_t
1623 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1624 {
1625 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1626 struct ccw_device *cdev = device->cdev;
1627
1628 switch (cdev->id.cu_type) {
1629 case 0x3990:
1630 case 0x2105:
1631 case 0x2107:
1632 case 0x1750:
1633 return dasd_3990_erp_action;
1634 case 0x9343:
1635 case 0x3880:
1636 default:
1637 return dasd_default_erp_action;
1638 }
1639 }
1640
1641 static dasd_erp_fn_t
1642 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1643 {
1644 return dasd_default_erp_postaction;
1645 }
1646
1647
1648 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1649 struct irb *irb)
1650 {
1651 char mask;
1652 char *sense = NULL;
1653
1654 /* first of all check for state change pending interrupt */
1655 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
1656 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
1657 dasd_generic_handle_state_change(device);
1658 return;
1659 }
1660
1661 /* summary unit check */
1662 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
1663 (irb->ecw[7] == 0x0D)) {
1664 dasd_alias_handle_summary_unit_check(device, irb);
1665 return;
1666 }
1667
1668 sense = dasd_get_sense(irb);
1669 /* service information message SIM */
1670 if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1671 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1672 dasd_3990_erp_handle_sim(device, sense);
1673 dasd_schedule_device_bh(device);
1674 return;
1675 }
1676
1677 if ((scsw_cc(&irb->scsw) == 1) &&
1678 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1679 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1680 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
1681 /* fake irb do nothing, they are handled elsewhere */
1682 dasd_schedule_device_bh(device);
1683 return;
1684 }
1685
1686 if (!sense) {
1687 /* just report other unsolicited interrupts */
1688 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1689 "unsolicited interrupt received");
1690 } else {
1691 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1692 "unsolicited interrupt received "
1693 "(sense available)");
1694 device->discipline->dump_sense_dbf(device, irb, "unsolicited");
1695 }
1696
1697 dasd_schedule_device_bh(device);
1698 return;
1699 };
1700
1701
1702 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1703 struct dasd_device *startdev,
1704 struct dasd_block *block,
1705 struct request *req,
1706 sector_t first_rec,
1707 sector_t last_rec,
1708 sector_t first_trk,
1709 sector_t last_trk,
1710 unsigned int first_offs,
1711 unsigned int last_offs,
1712 unsigned int blk_per_trk,
1713 unsigned int blksize)
1714 {
1715 struct dasd_eckd_private *private;
1716 unsigned long *idaws;
1717 struct LO_eckd_data *LO_data;
1718 struct dasd_ccw_req *cqr;
1719 struct ccw1 *ccw;
1720 struct req_iterator iter;
1721 struct bio_vec *bv;
1722 char *dst;
1723 unsigned int off;
1724 int count, cidaw, cplength, datasize;
1725 sector_t recid;
1726 unsigned char cmd, rcmd;
1727 int use_prefix;
1728 struct dasd_device *basedev;
1729
1730 basedev = block->base;
1731 private = (struct dasd_eckd_private *) basedev->private;
1732 if (rq_data_dir(req) == READ)
1733 cmd = DASD_ECKD_CCW_READ_MT;
1734 else if (rq_data_dir(req) == WRITE)
1735 cmd = DASD_ECKD_CCW_WRITE_MT;
1736 else
1737 return ERR_PTR(-EINVAL);
1738
1739 /* Check struct bio and count the number of blocks for the request. */
1740 count = 0;
1741 cidaw = 0;
1742 rq_for_each_segment(bv, req, iter) {
1743 if (bv->bv_len & (blksize - 1))
1744 /* Eckd can only do full blocks. */
1745 return ERR_PTR(-EINVAL);
1746 count += bv->bv_len >> (block->s2b_shift + 9);
1747 #if defined(CONFIG_64BIT)
1748 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
1749 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1750 #endif
1751 }
1752 /* Paranoia. */
1753 if (count != last_rec - first_rec + 1)
1754 return ERR_PTR(-EINVAL);
1755
1756 /* use the prefix command if available */
1757 use_prefix = private->features.feature[8] & 0x01;
1758 if (use_prefix) {
1759 /* 1x prefix + number of blocks */
1760 cplength = 2 + count;
1761 /* 1x prefix + cidaws*sizeof(long) */
1762 datasize = sizeof(struct PFX_eckd_data) +
1763 sizeof(struct LO_eckd_data) +
1764 cidaw * sizeof(unsigned long);
1765 } else {
1766 /* 1x define extent + 1x locate record + number of blocks */
1767 cplength = 2 + count;
1768 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1769 datasize = sizeof(struct DE_eckd_data) +
1770 sizeof(struct LO_eckd_data) +
1771 cidaw * sizeof(unsigned long);
1772 }
1773 /* Find out the number of additional locate record ccws for cdl. */
1774 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1775 if (last_rec >= 2*blk_per_trk)
1776 count = 2*blk_per_trk - first_rec;
1777 cplength += count;
1778 datasize += count*sizeof(struct LO_eckd_data);
1779 }
1780 /* Allocate the ccw request. */
1781 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1782 startdev);
1783 if (IS_ERR(cqr))
1784 return cqr;
1785 ccw = cqr->cpaddr;
1786 /* First ccw is define extent or prefix. */
1787 if (use_prefix) {
1788 if (prefix(ccw++, cqr->data, first_trk,
1789 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1790 /* Clock not in sync and XRC is enabled.
1791 * Try again later.
1792 */
1793 dasd_sfree_request(cqr, startdev);
1794 return ERR_PTR(-EAGAIN);
1795 }
1796 idaws = (unsigned long *) (cqr->data +
1797 sizeof(struct PFX_eckd_data));
1798 } else {
1799 if (define_extent(ccw++, cqr->data, first_trk,
1800 last_trk, cmd, startdev) == -EAGAIN) {
1801 /* Clock not in sync and XRC is enabled.
1802 * Try again later.
1803 */
1804 dasd_sfree_request(cqr, startdev);
1805 return ERR_PTR(-EAGAIN);
1806 }
1807 idaws = (unsigned long *) (cqr->data +
1808 sizeof(struct DE_eckd_data));
1809 }
1810 /* Build locate_record+read/write/ccws. */
1811 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1812 recid = first_rec;
1813 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1814 /* Only standard blocks so there is just one locate record. */
1815 ccw[-1].flags |= CCW_FLAG_CC;
1816 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1817 last_rec - recid + 1, cmd, basedev, blksize);
1818 }
1819 rq_for_each_segment(bv, req, iter) {
1820 dst = page_address(bv->bv_page) + bv->bv_offset;
1821 if (dasd_page_cache) {
1822 char *copy = kmem_cache_alloc(dasd_page_cache,
1823 GFP_DMA | __GFP_NOWARN);
1824 if (copy && rq_data_dir(req) == WRITE)
1825 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1826 if (copy)
1827 dst = copy + bv->bv_offset;
1828 }
1829 for (off = 0; off < bv->bv_len; off += blksize) {
1830 sector_t trkid = recid;
1831 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1832 rcmd = cmd;
1833 count = blksize;
1834 /* Locate record for cdl special block ? */
1835 if (private->uses_cdl && recid < 2*blk_per_trk) {
1836 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1837 rcmd |= 0x8;
1838 count = dasd_eckd_cdl_reclen(recid);
1839 if (count < blksize &&
1840 rq_data_dir(req) == READ)
1841 memset(dst + count, 0xe5,
1842 blksize - count);
1843 }
1844 ccw[-1].flags |= CCW_FLAG_CC;
1845 locate_record(ccw++, LO_data++,
1846 trkid, recoffs + 1,
1847 1, rcmd, basedev, count);
1848 }
1849 /* Locate record for standard blocks ? */
1850 if (private->uses_cdl && recid == 2*blk_per_trk) {
1851 ccw[-1].flags |= CCW_FLAG_CC;
1852 locate_record(ccw++, LO_data++,
1853 trkid, recoffs + 1,
1854 last_rec - recid + 1,
1855 cmd, basedev, count);
1856 }
1857 /* Read/write ccw. */
1858 ccw[-1].flags |= CCW_FLAG_CC;
1859 ccw->cmd_code = rcmd;
1860 ccw->count = count;
1861 if (idal_is_needed(dst, blksize)) {
1862 ccw->cda = (__u32)(addr_t) idaws;
1863 ccw->flags = CCW_FLAG_IDA;
1864 idaws = idal_create_words(idaws, dst, blksize);
1865 } else {
1866 ccw->cda = (__u32)(addr_t) dst;
1867 ccw->flags = 0;
1868 }
1869 ccw++;
1870 dst += blksize;
1871 recid++;
1872 }
1873 }
1874 if (blk_noretry_request(req) ||
1875 block->base->features & DASD_FEATURE_FAILFAST)
1876 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1877 cqr->startdev = startdev;
1878 cqr->memdev = startdev;
1879 cqr->block = block;
1880 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1881 cqr->lpm = private->path_data.ppm;
1882 cqr->retries = 256;
1883 cqr->buildclk = get_clock();
1884 cqr->status = DASD_CQR_FILLED;
1885 return cqr;
1886 }
1887
1888 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1889 struct dasd_device *startdev,
1890 struct dasd_block *block,
1891 struct request *req,
1892 sector_t first_rec,
1893 sector_t last_rec,
1894 sector_t first_trk,
1895 sector_t last_trk,
1896 unsigned int first_offs,
1897 unsigned int last_offs,
1898 unsigned int blk_per_trk,
1899 unsigned int blksize)
1900 {
1901 struct dasd_eckd_private *private;
1902 unsigned long *idaws;
1903 struct dasd_ccw_req *cqr;
1904 struct ccw1 *ccw;
1905 struct req_iterator iter;
1906 struct bio_vec *bv;
1907 char *dst, *idaw_dst;
1908 unsigned int cidaw, cplength, datasize;
1909 unsigned int tlf;
1910 sector_t recid;
1911 unsigned char cmd;
1912 struct dasd_device *basedev;
1913 unsigned int trkcount, count, count_to_trk_end;
1914 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
1915 unsigned char new_track, end_idaw;
1916 sector_t trkid;
1917 unsigned int recoffs;
1918
1919 basedev = block->base;
1920 private = (struct dasd_eckd_private *) basedev->private;
1921 if (rq_data_dir(req) == READ)
1922 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
1923 else if (rq_data_dir(req) == WRITE)
1924 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
1925 else
1926 return ERR_PTR(-EINVAL);
1927
1928 /* Track based I/O needs IDAWs for each page, and not just for
1929 * 64 bit addresses. We need additional idals for pages
1930 * that get filled from two tracks, so we use the number
1931 * of records as upper limit.
1932 */
1933 cidaw = last_rec - first_rec + 1;
1934 trkcount = last_trk - first_trk + 1;
1935
1936 /* 1x prefix + one read/write ccw per track */
1937 cplength = 1 + trkcount;
1938
1939 /* on 31-bit we need space for two 32 bit addresses per page
1940 * on 64-bit one 64 bit address
1941 */
1942 datasize = sizeof(struct PFX_eckd_data) +
1943 cidaw * sizeof(unsigned long long);
1944
1945 /* Allocate the ccw request. */
1946 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1947 startdev);
1948 if (IS_ERR(cqr))
1949 return cqr;
1950 ccw = cqr->cpaddr;
1951 /* transfer length factor: how many bytes to read from the last track */
1952 if (first_trk == last_trk)
1953 tlf = last_offs - first_offs + 1;
1954 else
1955 tlf = last_offs + 1;
1956 tlf *= blksize;
1957
1958 if (prefix_LRE(ccw++, cqr->data, first_trk,
1959 last_trk, cmd, basedev, startdev,
1960 1 /* format */, first_offs + 1,
1961 trkcount, blksize,
1962 tlf) == -EAGAIN) {
1963 /* Clock not in sync and XRC is enabled.
1964 * Try again later.
1965 */
1966 dasd_sfree_request(cqr, startdev);
1967 return ERR_PTR(-EAGAIN);
1968 }
1969
1970 /*
1971 * The translation of request into ccw programs must meet the
1972 * following conditions:
1973 * - all idaws but the first and the last must address full pages
1974 * (or 2K blocks on 31-bit)
1975 * - the scope of a ccw and it's idal ends with the track boundaries
1976 */
1977 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
1978 recid = first_rec;
1979 new_track = 1;
1980 end_idaw = 0;
1981 len_to_track_end = 0;
1982 idaw_dst = 0;
1983 idaw_len = 0;
1984 rq_for_each_segment(bv, req, iter) {
1985 dst = page_address(bv->bv_page) + bv->bv_offset;
1986 seg_len = bv->bv_len;
1987 while (seg_len) {
1988 if (new_track) {
1989 trkid = recid;
1990 recoffs = sector_div(trkid, blk_per_trk);
1991 count_to_trk_end = blk_per_trk - recoffs;
1992 count = min((last_rec - recid + 1),
1993 (sector_t)count_to_trk_end);
1994 len_to_track_end = count * blksize;
1995 ccw[-1].flags |= CCW_FLAG_CC;
1996 ccw->cmd_code = cmd;
1997 ccw->count = len_to_track_end;
1998 ccw->cda = (__u32)(addr_t)idaws;
1999 ccw->flags = CCW_FLAG_IDA;
2000 ccw++;
2001 recid += count;
2002 new_track = 0;
2003 /* first idaw for a ccw may start anywhere */
2004 if (!idaw_dst)
2005 idaw_dst = dst;
2006 }
2007 /* If we start a new idaw, we must make sure that it
2008 * starts on an IDA_BLOCK_SIZE boundary.
2009 * If we continue an idaw, we must make sure that the
2010 * current segment begins where the so far accumulated
2011 * idaw ends
2012 */
2013 if (!idaw_dst) {
2014 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2015 dasd_sfree_request(cqr, startdev);
2016 return ERR_PTR(-ERANGE);
2017 } else
2018 idaw_dst = dst;
2019 }
2020 if ((idaw_dst + idaw_len) != dst) {
2021 dasd_sfree_request(cqr, startdev);
2022 return ERR_PTR(-ERANGE);
2023 }
2024 part_len = min(seg_len, len_to_track_end);
2025 seg_len -= part_len;
2026 dst += part_len;
2027 idaw_len += part_len;
2028 len_to_track_end -= part_len;
2029 /* collected memory area ends on an IDA_BLOCK border,
2030 * -> create an idaw
2031 * idal_create_words will handle cases where idaw_len
2032 * is larger then IDA_BLOCK_SIZE
2033 */
2034 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2035 end_idaw = 1;
2036 /* We also need to end the idaw at track end */
2037 if (!len_to_track_end) {
2038 new_track = 1;
2039 end_idaw = 1;
2040 }
2041 if (end_idaw) {
2042 idaws = idal_create_words(idaws, idaw_dst,
2043 idaw_len);
2044 idaw_dst = 0;
2045 idaw_len = 0;
2046 end_idaw = 0;
2047 }
2048 }
2049 }
2050
2051 if (blk_noretry_request(req) ||
2052 block->base->features & DASD_FEATURE_FAILFAST)
2053 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2054 cqr->startdev = startdev;
2055 cqr->memdev = startdev;
2056 cqr->block = block;
2057 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2058 cqr->lpm = private->path_data.ppm;
2059 cqr->retries = 256;
2060 cqr->buildclk = get_clock();
2061 cqr->status = DASD_CQR_FILLED;
2062 return cqr;
2063 }
2064
2065 static int prepare_itcw(struct itcw *itcw,
2066 unsigned int trk, unsigned int totrk, int cmd,
2067 struct dasd_device *basedev,
2068 struct dasd_device *startdev,
2069 unsigned int rec_on_trk, int count,
2070 unsigned int blksize,
2071 unsigned int total_data_size,
2072 unsigned int tlf,
2073 unsigned int blk_per_trk)
2074 {
2075 struct PFX_eckd_data pfxdata;
2076 struct dasd_eckd_private *basepriv, *startpriv;
2077 struct DE_eckd_data *dedata;
2078 struct LRE_eckd_data *lredata;
2079 struct dcw *dcw;
2080
2081 u32 begcyl, endcyl;
2082 u16 heads, beghead, endhead;
2083 u8 pfx_cmd;
2084
2085 int rc = 0;
2086 int sector = 0;
2087 int dn, d;
2088
2089
2090 /* setup prefix data */
2091 basepriv = (struct dasd_eckd_private *) basedev->private;
2092 startpriv = (struct dasd_eckd_private *) startdev->private;
2093 dedata = &pfxdata.define_extent;
2094 lredata = &pfxdata.locate_record;
2095
2096 memset(&pfxdata, 0, sizeof(pfxdata));
2097 pfxdata.format = 1; /* PFX with LRE */
2098 pfxdata.base_address = basepriv->ned->unit_addr;
2099 pfxdata.base_lss = basepriv->ned->ID;
2100 pfxdata.validity.define_extent = 1;
2101
2102 /* private uid is kept up to date, conf_data may be outdated */
2103 if (startpriv->uid.type != UA_BASE_DEVICE) {
2104 pfxdata.validity.verify_base = 1;
2105 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2106 pfxdata.validity.hyper_pav = 1;
2107 }
2108
2109 switch (cmd) {
2110 case DASD_ECKD_CCW_READ_TRACK_DATA:
2111 dedata->mask.perm = 0x1;
2112 dedata->attributes.operation = basepriv->attrib.operation;
2113 dedata->blk_size = blksize;
2114 dedata->ga_extended |= 0x42;
2115 lredata->operation.orientation = 0x0;
2116 lredata->operation.operation = 0x0C;
2117 lredata->auxiliary.check_bytes = 0x01;
2118 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2119 break;
2120 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2121 dedata->mask.perm = 0x02;
2122 dedata->attributes.operation = basepriv->attrib.operation;
2123 dedata->blk_size = blksize;
2124 rc = check_XRC_on_prefix(&pfxdata, basedev);
2125 dedata->ga_extended |= 0x42;
2126 lredata->operation.orientation = 0x0;
2127 lredata->operation.operation = 0x3F;
2128 lredata->extended_operation = 0x23;
2129 lredata->auxiliary.check_bytes = 0x2;
2130 pfx_cmd = DASD_ECKD_CCW_PFX;
2131 break;
2132 default:
2133 DBF_DEV_EVENT(DBF_ERR, basedev,
2134 "prepare itcw, unknown opcode 0x%x", cmd);
2135 BUG();
2136 break;
2137 }
2138 if (rc)
2139 return rc;
2140
2141 dedata->attributes.mode = 0x3; /* ECKD */
2142
2143 heads = basepriv->rdc_data.trk_per_cyl;
2144 begcyl = trk / heads;
2145 beghead = trk % heads;
2146 endcyl = totrk / heads;
2147 endhead = totrk % heads;
2148
2149 /* check for sequential prestage - enhance cylinder range */
2150 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2151 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2152
2153 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2154 endcyl += basepriv->attrib.nr_cyl;
2155 else
2156 endcyl = (basepriv->real_cyl - 1);
2157 }
2158
2159 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2160 set_ch_t(&dedata->end_ext, endcyl, endhead);
2161
2162 dedata->ep_format = 0x20; /* records per track is valid */
2163 dedata->ep_rec_per_track = blk_per_trk;
2164
2165 if (rec_on_trk) {
2166 switch (basepriv->rdc_data.dev_type) {
2167 case 0x3390:
2168 dn = ceil_quot(blksize + 6, 232);
2169 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2170 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2171 break;
2172 case 0x3380:
2173 d = 7 + ceil_quot(blksize + 12, 32);
2174 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2175 break;
2176 }
2177 }
2178
2179 lredata->auxiliary.length_valid = 1;
2180 lredata->auxiliary.length_scope = 1;
2181 lredata->auxiliary.imbedded_ccw_valid = 1;
2182 lredata->length = tlf;
2183 lredata->imbedded_ccw = cmd;
2184 lredata->count = count;
2185 lredata->sector = sector;
2186 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2187 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2188 lredata->search_arg.head = lredata->seek_addr.head;
2189 lredata->search_arg.record = rec_on_trk;
2190
2191 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2192 &pfxdata, sizeof(pfxdata), total_data_size);
2193
2194 return rc;
2195 }
2196
2197 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2198 struct dasd_device *startdev,
2199 struct dasd_block *block,
2200 struct request *req,
2201 sector_t first_rec,
2202 sector_t last_rec,
2203 sector_t first_trk,
2204 sector_t last_trk,
2205 unsigned int first_offs,
2206 unsigned int last_offs,
2207 unsigned int blk_per_trk,
2208 unsigned int blksize)
2209 {
2210 struct dasd_eckd_private *private;
2211 struct dasd_ccw_req *cqr;
2212 struct req_iterator iter;
2213 struct bio_vec *bv;
2214 char *dst;
2215 unsigned int trkcount, ctidaw;
2216 unsigned char cmd;
2217 struct dasd_device *basedev;
2218 unsigned int tlf;
2219 struct itcw *itcw;
2220 struct tidaw *last_tidaw = NULL;
2221 int itcw_op;
2222 size_t itcw_size;
2223
2224 basedev = block->base;
2225 private = (struct dasd_eckd_private *) basedev->private;
2226 if (rq_data_dir(req) == READ) {
2227 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2228 itcw_op = ITCW_OP_READ;
2229 } else if (rq_data_dir(req) == WRITE) {
2230 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2231 itcw_op = ITCW_OP_WRITE;
2232 } else
2233 return ERR_PTR(-EINVAL);
2234
2235 /* trackbased I/O needs address all memory via TIDAWs,
2236 * not just for 64 bit addresses. This allows us to map
2237 * each segment directly to one tidaw.
2238 */
2239 trkcount = last_trk - first_trk + 1;
2240 ctidaw = 0;
2241 rq_for_each_segment(bv, req, iter) {
2242 ++ctidaw;
2243 }
2244
2245 /* Allocate the ccw request. */
2246 itcw_size = itcw_calc_size(0, ctidaw, 0);
2247 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2248 if (IS_ERR(cqr))
2249 return cqr;
2250
2251 cqr->cpmode = 1;
2252 cqr->startdev = startdev;
2253 cqr->memdev = startdev;
2254 cqr->block = block;
2255 cqr->expires = 100*HZ;
2256 cqr->buildclk = get_clock();
2257 cqr->status = DASD_CQR_FILLED;
2258 cqr->retries = 10;
2259
2260 /* transfer length factor: how many bytes to read from the last track */
2261 if (first_trk == last_trk)
2262 tlf = last_offs - first_offs + 1;
2263 else
2264 tlf = last_offs + 1;
2265 tlf *= blksize;
2266
2267 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2268 cqr->cpaddr = itcw_get_tcw(itcw);
2269
2270 if (prepare_itcw(itcw, first_trk, last_trk,
2271 cmd, basedev, startdev,
2272 first_offs + 1,
2273 trkcount, blksize,
2274 (last_rec - first_rec + 1) * blksize,
2275 tlf, blk_per_trk) == -EAGAIN) {
2276 /* Clock not in sync and XRC is enabled.
2277 * Try again later.
2278 */
2279 dasd_sfree_request(cqr, startdev);
2280 return ERR_PTR(-EAGAIN);
2281 }
2282
2283 /*
2284 * A tidaw can address 4k of memory, but must not cross page boundaries
2285 * We can let the block layer handle this by setting
2286 * blk_queue_segment_boundary to page boundaries and
2287 * blk_max_segment_size to page size when setting up the request queue.
2288 */
2289 rq_for_each_segment(bv, req, iter) {
2290 dst = page_address(bv->bv_page) + bv->bv_offset;
2291 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2292 if (IS_ERR(last_tidaw))
2293 return (struct dasd_ccw_req *)last_tidaw;
2294 }
2295
2296 last_tidaw->flags |= 0x80;
2297 itcw_finalize(itcw);
2298
2299 if (blk_noretry_request(req) ||
2300 block->base->features & DASD_FEATURE_FAILFAST)
2301 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2302 cqr->startdev = startdev;
2303 cqr->memdev = startdev;
2304 cqr->block = block;
2305 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2306 cqr->lpm = private->path_data.ppm;
2307 cqr->retries = 256;
2308 cqr->buildclk = get_clock();
2309 cqr->status = DASD_CQR_FILLED;
2310 return cqr;
2311 }
2312
2313 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2314 struct dasd_block *block,
2315 struct request *req)
2316 {
2317 int tpm, cmdrtd, cmdwtd;
2318 int use_prefix;
2319 #if defined(CONFIG_64BIT)
2320 int fcx_in_css, fcx_in_gneq, fcx_in_features;
2321 #endif
2322 struct dasd_eckd_private *private;
2323 struct dasd_device *basedev;
2324 sector_t first_rec, last_rec;
2325 sector_t first_trk, last_trk;
2326 unsigned int first_offs, last_offs;
2327 unsigned int blk_per_trk, blksize;
2328 int cdlspecial;
2329 struct dasd_ccw_req *cqr;
2330
2331 basedev = block->base;
2332 private = (struct dasd_eckd_private *) basedev->private;
2333
2334 /* Calculate number of blocks/records per track. */
2335 blksize = block->bp_block;
2336 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2337 if (blk_per_trk == 0)
2338 return ERR_PTR(-EINVAL);
2339 /* Calculate record id of first and last block. */
2340 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
2341 first_offs = sector_div(first_trk, blk_per_trk);
2342 last_rec = last_trk =
2343 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
2344 last_offs = sector_div(last_trk, blk_per_trk);
2345 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2346
2347 /* is transport mode supported? */
2348 #if defined(CONFIG_64BIT)
2349 fcx_in_css = css_general_characteristics.fcx;
2350 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2351 fcx_in_features = private->features.feature[40] & 0x80;
2352 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
2353 #else
2354 tpm = 0;
2355 #endif
2356
2357 /* is read track data and write track data in command mode supported? */
2358 cmdrtd = private->features.feature[9] & 0x20;
2359 cmdwtd = private->features.feature[12] & 0x40;
2360 use_prefix = private->features.feature[8] & 0x01;
2361
2362 cqr = NULL;
2363 if (cdlspecial || dasd_page_cache) {
2364 /* do nothing, just fall through to the cmd mode single case */
2365 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2366 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2367 first_rec, last_rec,
2368 first_trk, last_trk,
2369 first_offs, last_offs,
2370 blk_per_trk, blksize);
2371 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2372 cqr = NULL;
2373 } else if (use_prefix &&
2374 (((rq_data_dir(req) == READ) && cmdrtd) ||
2375 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2376 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2377 first_rec, last_rec,
2378 first_trk, last_trk,
2379 first_offs, last_offs,
2380 blk_per_trk, blksize);
2381 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2382 cqr = NULL;
2383 }
2384 if (!cqr)
2385 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2386 first_rec, last_rec,
2387 first_trk, last_trk,
2388 first_offs, last_offs,
2389 blk_per_trk, blksize);
2390 return cqr;
2391 }
2392
2393 static int
2394 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2395 {
2396 struct dasd_eckd_private *private;
2397 struct ccw1 *ccw;
2398 struct req_iterator iter;
2399 struct bio_vec *bv;
2400 char *dst, *cda;
2401 unsigned int blksize, blk_per_trk, off;
2402 sector_t recid;
2403 int status;
2404
2405 if (!dasd_page_cache)
2406 goto out;
2407 private = (struct dasd_eckd_private *) cqr->block->base->private;
2408 blksize = cqr->block->bp_block;
2409 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2410 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
2411 ccw = cqr->cpaddr;
2412 /* Skip over define extent & locate record. */
2413 ccw++;
2414 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2415 ccw++;
2416 rq_for_each_segment(bv, req, iter) {
2417 dst = page_address(bv->bv_page) + bv->bv_offset;
2418 for (off = 0; off < bv->bv_len; off += blksize) {
2419 /* Skip locate record. */
2420 if (private->uses_cdl && recid <= 2*blk_per_trk)
2421 ccw++;
2422 if (dst) {
2423 if (ccw->flags & CCW_FLAG_IDA)
2424 cda = *((char **)((addr_t) ccw->cda));
2425 else
2426 cda = (char *)((addr_t) ccw->cda);
2427 if (dst != cda) {
2428 if (rq_data_dir(req) == READ)
2429 memcpy(dst, cda, bv->bv_len);
2430 kmem_cache_free(dasd_page_cache,
2431 (void *)((addr_t)cda & PAGE_MASK));
2432 }
2433 dst = NULL;
2434 }
2435 ccw++;
2436 recid++;
2437 }
2438 }
2439 out:
2440 status = cqr->status == DASD_CQR_DONE;
2441 dasd_sfree_request(cqr, cqr->memdev);
2442 return status;
2443 }
2444
2445 /*
2446 * Modify ccw/tcw in cqr so it can be started on a base device.
2447 *
2448 * Note that this is not enough to restart the cqr!
2449 * Either reset cqr->startdev as well (summary unit check handling)
2450 * or restart via separate cqr (as in ERP handling).
2451 */
2452 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2453 {
2454 struct ccw1 *ccw;
2455 struct PFX_eckd_data *pfxdata;
2456 struct tcw *tcw;
2457 struct tccb *tccb;
2458 struct dcw *dcw;
2459
2460 if (cqr->cpmode == 1) {
2461 tcw = cqr->cpaddr;
2462 tccb = tcw_get_tccb(tcw);
2463 dcw = (struct dcw *)&tccb->tca[0];
2464 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
2465 pfxdata->validity.verify_base = 0;
2466 pfxdata->validity.hyper_pav = 0;
2467 } else {
2468 ccw = cqr->cpaddr;
2469 pfxdata = cqr->data;
2470 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2471 pfxdata->validity.verify_base = 0;
2472 pfxdata->validity.hyper_pav = 0;
2473 }
2474 }
2475 }
2476
2477 #define DASD_ECKD_CHANQ_MAX_SIZE 4
2478
2479 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2480 struct dasd_block *block,
2481 struct request *req)
2482 {
2483 struct dasd_eckd_private *private;
2484 struct dasd_device *startdev;
2485 unsigned long flags;
2486 struct dasd_ccw_req *cqr;
2487
2488 startdev = dasd_alias_get_start_dev(base);
2489 if (!startdev)
2490 startdev = base;
2491 private = (struct dasd_eckd_private *) startdev->private;
2492 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2493 return ERR_PTR(-EBUSY);
2494
2495 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2496 private->count++;
2497 cqr = dasd_eckd_build_cp(startdev, block, req);
2498 if (IS_ERR(cqr))
2499 private->count--;
2500 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2501 return cqr;
2502 }
2503
2504 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2505 struct request *req)
2506 {
2507 struct dasd_eckd_private *private;
2508 unsigned long flags;
2509
2510 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2511 private = (struct dasd_eckd_private *) cqr->memdev->private;
2512 private->count--;
2513 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2514 return dasd_eckd_free_cp(cqr, req);
2515 }
2516
2517 static int
2518 dasd_eckd_fill_info(struct dasd_device * device,
2519 struct dasd_information2_t * info)
2520 {
2521 struct dasd_eckd_private *private;
2522
2523 private = (struct dasd_eckd_private *) device->private;
2524 info->label_block = 2;
2525 info->FBA_layout = private->uses_cdl ? 0 : 1;
2526 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2527 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2528 memcpy(info->characteristics, &private->rdc_data,
2529 sizeof(struct dasd_eckd_characteristics));
2530 info->confdata_size = min((unsigned long)private->conf_len,
2531 sizeof(info->configuration_data));
2532 memcpy(info->configuration_data, private->conf_data,
2533 info->confdata_size);
2534 return 0;
2535 }
2536
2537 /*
2538 * SECTION: ioctl functions for eckd devices.
2539 */
2540
2541 /*
2542 * Release device ioctl.
2543 * Buils a channel programm to releases a prior reserved
2544 * (see dasd_eckd_reserve) device.
2545 */
2546 static int
2547 dasd_eckd_release(struct dasd_device *device)
2548 {
2549 struct dasd_ccw_req *cqr;
2550 int rc;
2551 struct ccw1 *ccw;
2552
2553 if (!capable(CAP_SYS_ADMIN))
2554 return -EACCES;
2555
2556 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2557 if (IS_ERR(cqr)) {
2558 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2559 "Could not allocate initialization request");
2560 return PTR_ERR(cqr);
2561 }
2562 ccw = cqr->cpaddr;
2563 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2564 ccw->flags |= CCW_FLAG_SLI;
2565 ccw->count = 32;
2566 ccw->cda = (__u32)(addr_t) cqr->data;
2567 cqr->startdev = device;
2568 cqr->memdev = device;
2569 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2570 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2571 cqr->retries = 2; /* set retry counter to enable basic ERP */
2572 cqr->expires = 2 * HZ;
2573 cqr->buildclk = get_clock();
2574 cqr->status = DASD_CQR_FILLED;
2575
2576 rc = dasd_sleep_on_immediatly(cqr);
2577
2578 dasd_sfree_request(cqr, cqr->memdev);
2579 return rc;
2580 }
2581
2582 /*
2583 * Reserve device ioctl.
2584 * Options are set to 'synchronous wait for interrupt' and
2585 * 'timeout the request'. This leads to a terminate IO if
2586 * the interrupt is outstanding for a certain time.
2587 */
2588 static int
2589 dasd_eckd_reserve(struct dasd_device *device)
2590 {
2591 struct dasd_ccw_req *cqr;
2592 int rc;
2593 struct ccw1 *ccw;
2594
2595 if (!capable(CAP_SYS_ADMIN))
2596 return -EACCES;
2597
2598 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2599 if (IS_ERR(cqr)) {
2600 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2601 "Could not allocate initialization request");
2602 return PTR_ERR(cqr);
2603 }
2604 ccw = cqr->cpaddr;
2605 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2606 ccw->flags |= CCW_FLAG_SLI;
2607 ccw->count = 32;
2608 ccw->cda = (__u32)(addr_t) cqr->data;
2609 cqr->startdev = device;
2610 cqr->memdev = device;
2611 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2612 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2613 cqr->retries = 2; /* set retry counter to enable basic ERP */
2614 cqr->expires = 2 * HZ;
2615 cqr->buildclk = get_clock();
2616 cqr->status = DASD_CQR_FILLED;
2617
2618 rc = dasd_sleep_on_immediatly(cqr);
2619
2620 dasd_sfree_request(cqr, cqr->memdev);
2621 return rc;
2622 }
2623
2624 /*
2625 * Steal lock ioctl - unconditional reserve device.
2626 * Buils a channel programm to break a device's reservation.
2627 * (unconditional reserve)
2628 */
2629 static int
2630 dasd_eckd_steal_lock(struct dasd_device *device)
2631 {
2632 struct dasd_ccw_req *cqr;
2633 int rc;
2634 struct ccw1 *ccw;
2635
2636 if (!capable(CAP_SYS_ADMIN))
2637 return -EACCES;
2638
2639 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2640 if (IS_ERR(cqr)) {
2641 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2642 "Could not allocate initialization request");
2643 return PTR_ERR(cqr);
2644 }
2645 ccw = cqr->cpaddr;
2646 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2647 ccw->flags |= CCW_FLAG_SLI;
2648 ccw->count = 32;
2649 ccw->cda = (__u32)(addr_t) cqr->data;
2650 cqr->startdev = device;
2651 cqr->memdev = device;
2652 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2653 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2654 cqr->retries = 2; /* set retry counter to enable basic ERP */
2655 cqr->expires = 2 * HZ;
2656 cqr->buildclk = get_clock();
2657 cqr->status = DASD_CQR_FILLED;
2658
2659 rc = dasd_sleep_on_immediatly(cqr);
2660
2661 dasd_sfree_request(cqr, cqr->memdev);
2662 return rc;
2663 }
2664
2665 /*
2666 * Read performance statistics
2667 */
2668 static int
2669 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
2670 {
2671 struct dasd_psf_prssd_data *prssdp;
2672 struct dasd_rssd_perf_stats_t *stats;
2673 struct dasd_ccw_req *cqr;
2674 struct ccw1 *ccw;
2675 int rc;
2676
2677 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
2678 (sizeof(struct dasd_psf_prssd_data) +
2679 sizeof(struct dasd_rssd_perf_stats_t)),
2680 device);
2681 if (IS_ERR(cqr)) {
2682 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2683 "Could not allocate initialization request");
2684 return PTR_ERR(cqr);
2685 }
2686 cqr->startdev = device;
2687 cqr->memdev = device;
2688 cqr->retries = 0;
2689 cqr->expires = 10 * HZ;
2690
2691 /* Prepare for Read Subsystem Data */
2692 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2693 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
2694 prssdp->order = PSF_ORDER_PRSSD;
2695 prssdp->suborder = 0x01; /* Performance Statistics */
2696 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2697
2698 ccw = cqr->cpaddr;
2699 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2700 ccw->count = sizeof(struct dasd_psf_prssd_data);
2701 ccw->flags |= CCW_FLAG_CC;
2702 ccw->cda = (__u32)(addr_t) prssdp;
2703
2704 /* Read Subsystem Data - Performance Statistics */
2705 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2706 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
2707
2708 ccw++;
2709 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2710 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
2711 ccw->cda = (__u32)(addr_t) stats;
2712
2713 cqr->buildclk = get_clock();
2714 cqr->status = DASD_CQR_FILLED;
2715 rc = dasd_sleep_on(cqr);
2716 if (rc == 0) {
2717 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2718 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2719 if (copy_to_user(argp, stats,
2720 sizeof(struct dasd_rssd_perf_stats_t)))
2721 rc = -EFAULT;
2722 }
2723 dasd_sfree_request(cqr, cqr->memdev);
2724 return rc;
2725 }
2726
2727 /*
2728 * Get attributes (cache operations)
2729 * Returnes the cache attributes used in Define Extend (DE).
2730 */
2731 static int
2732 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
2733 {
2734 struct dasd_eckd_private *private =
2735 (struct dasd_eckd_private *)device->private;
2736 struct attrib_data_t attrib = private->attrib;
2737 int rc;
2738
2739 if (!capable(CAP_SYS_ADMIN))
2740 return -EACCES;
2741 if (!argp)
2742 return -EINVAL;
2743
2744 rc = 0;
2745 if (copy_to_user(argp, (long *) &attrib,
2746 sizeof(struct attrib_data_t)))
2747 rc = -EFAULT;
2748
2749 return rc;
2750 }
2751
2752 /*
2753 * Set attributes (cache operations)
2754 * Stores the attributes for cache operation to be used in Define Extend (DE).
2755 */
2756 static int
2757 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
2758 {
2759 struct dasd_eckd_private *private =
2760 (struct dasd_eckd_private *)device->private;
2761 struct attrib_data_t attrib;
2762
2763 if (!capable(CAP_SYS_ADMIN))
2764 return -EACCES;
2765 if (!argp)
2766 return -EINVAL;
2767
2768 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
2769 return -EFAULT;
2770 private->attrib = attrib;
2771
2772 dev_info(&device->cdev->dev,
2773 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2774 private->attrib.operation, private->attrib.nr_cyl);
2775 return 0;
2776 }
2777
2778 /*
2779 * Issue syscall I/O to EMC Symmetrix array.
2780 * CCWs are PSF and RSSD
2781 */
2782 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2783 {
2784 struct dasd_symmio_parms usrparm;
2785 char *psf_data, *rssd_result;
2786 struct dasd_ccw_req *cqr;
2787 struct ccw1 *ccw;
2788 int rc;
2789
2790 /* Copy parms from caller */
2791 rc = -EFAULT;
2792 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2793 goto out;
2794 #ifndef CONFIG_64BIT
2795 /* Make sure pointers are sane even on 31 bit. */
2796 if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
2797 rc = -EINVAL;
2798 goto out;
2799 }
2800 #endif
2801 /* alloc I/O data area */
2802 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2803 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2804 if (!psf_data || !rssd_result) {
2805 rc = -ENOMEM;
2806 goto out_free;
2807 }
2808
2809 /* get syscall header from user space */
2810 rc = -EFAULT;
2811 if (copy_from_user(psf_data,
2812 (void __user *)(unsigned long) usrparm.psf_data,
2813 usrparm.psf_data_len))
2814 goto out_free;
2815
2816 /* sanity check on syscall header */
2817 if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
2818 rc = -EINVAL;
2819 goto out_free;
2820 }
2821
2822 /* setup CCWs for PSF + RSSD */
2823 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
2824 if (IS_ERR(cqr)) {
2825 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2826 "Could not allocate initialization request");
2827 rc = PTR_ERR(cqr);
2828 goto out_free;
2829 }
2830
2831 cqr->startdev = device;
2832 cqr->memdev = device;
2833 cqr->retries = 3;
2834 cqr->expires = 10 * HZ;
2835 cqr->buildclk = get_clock();
2836 cqr->status = DASD_CQR_FILLED;
2837
2838 /* Build the ccws */
2839 ccw = cqr->cpaddr;
2840
2841 /* PSF ccw */
2842 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2843 ccw->count = usrparm.psf_data_len;
2844 ccw->flags |= CCW_FLAG_CC;
2845 ccw->cda = (__u32)(addr_t) psf_data;
2846
2847 ccw++;
2848
2849 /* RSSD ccw */
2850 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2851 ccw->count = usrparm.rssd_result_len;
2852 ccw->flags = CCW_FLAG_SLI ;
2853 ccw->cda = (__u32)(addr_t) rssd_result;
2854
2855 rc = dasd_sleep_on(cqr);
2856 if (rc)
2857 goto out_sfree;
2858
2859 rc = -EFAULT;
2860 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2861 rssd_result, usrparm.rssd_result_len))
2862 goto out_sfree;
2863 rc = 0;
2864
2865 out_sfree:
2866 dasd_sfree_request(cqr, cqr->memdev);
2867 out_free:
2868 kfree(rssd_result);
2869 kfree(psf_data);
2870 out:
2871 DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
2872 return rc;
2873 }
2874
2875 static int
2876 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
2877 {
2878 struct dasd_device *device = block->base;
2879
2880 switch (cmd) {
2881 case BIODASDGATTR:
2882 return dasd_eckd_get_attrib(device, argp);
2883 case BIODASDSATTR:
2884 return dasd_eckd_set_attrib(device, argp);
2885 case BIODASDPSRD:
2886 return dasd_eckd_performance(device, argp);
2887 case BIODASDRLSE:
2888 return dasd_eckd_release(device);
2889 case BIODASDRSRV:
2890 return dasd_eckd_reserve(device);
2891 case BIODASDSLCK:
2892 return dasd_eckd_steal_lock(device);
2893 case BIODASDSYMMIO:
2894 return dasd_symm_io(device, argp);
2895 default:
2896 return -ENOIOCTLCMD;
2897 }
2898 }
2899
2900 /*
2901 * Dump the range of CCWs into 'page' buffer
2902 * and return number of printed chars.
2903 */
2904 static int
2905 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
2906 {
2907 int len, count;
2908 char *datap;
2909
2910 len = 0;
2911 while (from <= to) {
2912 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2913 " CCW %p: %08X %08X DAT:",
2914 from, ((int *) from)[0], ((int *) from)[1]);
2915
2916 /* get pointer to data (consider IDALs) */
2917 if (from->flags & CCW_FLAG_IDA)
2918 datap = (char *) *((addr_t *) (addr_t) from->cda);
2919 else
2920 datap = (char *) ((addr_t) from->cda);
2921
2922 /* dump data (max 32 bytes) */
2923 for (count = 0; count < from->count && count < 32; count++) {
2924 if (count % 8 == 0) len += sprintf(page + len, " ");
2925 if (count % 4 == 0) len += sprintf(page + len, " ");
2926 len += sprintf(page + len, "%02x", datap[count]);
2927 }
2928 len += sprintf(page + len, "\n");
2929 from++;
2930 }
2931 return len;
2932 }
2933
2934 static void
2935 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
2936 char *reason)
2937 {
2938 u64 *sense;
2939
2940 sense = (u64 *) dasd_get_sense(irb);
2941 if (sense) {
2942 DBF_DEV_EVENT(DBF_EMERG, device,
2943 "%s: %s %02x%02x%02x %016llx %016llx %016llx "
2944 "%016llx", reason,
2945 scsw_is_tm(&irb->scsw) ? "t" : "c",
2946 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
2947 scsw_dstat(&irb->scsw), sense[0], sense[1],
2948 sense[2], sense[3]);
2949 } else {
2950 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
2951 "SORRY - NO VALID SENSE AVAILABLE\n");
2952 }
2953 }
2954
2955 /*
2956 * Print sense data and related channel program.
2957 * Parts are printed because printk buffer is only 1024 bytes.
2958 */
2959 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
2960 struct dasd_ccw_req *req, struct irb *irb)
2961 {
2962 char *page;
2963 struct ccw1 *first, *last, *fail, *from, *to;
2964 int len, sl, sct;
2965
2966 page = (char *) get_zeroed_page(GFP_ATOMIC);
2967 if (page == NULL) {
2968 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2969 "No memory to dump sense data\n");
2970 return;
2971 }
2972 /* dump the sense data */
2973 len = sprintf(page, KERN_ERR PRINTK_HEADER
2974 " I/O status report for device %s:\n",
2975 dev_name(&device->cdev->dev));
2976 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2977 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
2978 req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
2979 scsw_cc(&irb->scsw), req ? req->intrc : 0);
2980 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2981 " device %s: Failing CCW: %p\n",
2982 dev_name(&device->cdev->dev),
2983 (void *) (addr_t) irb->scsw.cmd.cpa);
2984 if (irb->esw.esw0.erw.cons) {
2985 for (sl = 0; sl < 4; sl++) {
2986 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2987 " Sense(hex) %2d-%2d:",
2988 (8 * sl), ((8 * sl) + 7));
2989
2990 for (sct = 0; sct < 8; sct++) {
2991 len += sprintf(page + len, " %02x",
2992 irb->ecw[8 * sl + sct]);
2993 }
2994 len += sprintf(page + len, "\n");
2995 }
2996
2997 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
2998 /* 24 Byte Sense Data */
2999 sprintf(page + len, KERN_ERR PRINTK_HEADER
3000 " 24 Byte: %x MSG %x, "
3001 "%s MSGb to SYSOP\n",
3002 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3003 irb->ecw[1] & 0x10 ? "" : "no");
3004 } else {
3005 /* 32 Byte Sense Data */
3006 sprintf(page + len, KERN_ERR PRINTK_HEADER
3007 " 32 Byte: Format: %x "
3008 "Exception class %x\n",
3009 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
3010 }
3011 } else {
3012 sprintf(page + len, KERN_ERR PRINTK_HEADER
3013 " SORRY - NO VALID SENSE AVAILABLE\n");
3014 }
3015 printk("%s", page);
3016
3017 if (req) {
3018 /* req == NULL for unsolicited interrupts */
3019 /* dump the Channel Program (max 140 Bytes per line) */
3020 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3021 first = req->cpaddr;
3022 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3023 to = min(first + 6, last);
3024 len = sprintf(page, KERN_ERR PRINTK_HEADER
3025 " Related CP in req: %p\n", req);
3026 dasd_eckd_dump_ccw_range(first, to, page + len);
3027 printk("%s", page);
3028
3029 /* print failing CCW area (maximum 4) */
3030 /* scsw->cda is either valid or zero */
3031 len = 0;
3032 from = ++to;
3033 fail = (struct ccw1 *)(addr_t)
3034 irb->scsw.cmd.cpa; /* failing CCW */
3035 if (from < fail - 2) {
3036 from = fail - 2; /* there is a gap - print header */
3037 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3038 }
3039 to = min(fail + 1, last);
3040 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3041
3042 /* print last CCWs (maximum 2) */
3043 from = max(from, ++to);
3044 if (from < last - 1) {
3045 from = last - 1; /* there is a gap - print header */
3046 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3047 }
3048 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3049 if (len > 0)
3050 printk("%s", page);
3051 }
3052 free_page((unsigned long) page);
3053 }
3054
3055
3056 /*
3057 * Print sense data from a tcw.
3058 */
3059 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3060 struct dasd_ccw_req *req, struct irb *irb)
3061 {
3062 char *page;
3063 int len, sl, sct, residual;
3064
3065 struct tsb *tsb;
3066 u8 *sense;
3067
3068
3069 page = (char *) get_zeroed_page(GFP_ATOMIC);
3070 if (page == NULL) {
3071 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
3072 "No memory to dump sense data");
3073 return;
3074 }
3075 /* dump the sense data */
3076 len = sprintf(page, KERN_ERR PRINTK_HEADER
3077 " I/O status report for device %s:\n",
3078 dev_name(&device->cdev->dev));
3079 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3080 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
3081 "fcxs: 0x%02X schxs: 0x%02X\n", req,
3082 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3083 scsw_cc(&irb->scsw), req->intrc,
3084 irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3085 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3086 " device %s: Failing TCW: %p\n",
3087 dev_name(&device->cdev->dev),
3088 (void *) (addr_t) irb->scsw.tm.tcw);
3089
3090 tsb = NULL;
3091 sense = NULL;
3092 if (irb->scsw.tm.tcw)
3093 tsb = tcw_get_tsb(
3094 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3095
3096 if (tsb && (irb->scsw.tm.fcxs == 0x01)) {
3097 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3098 " tsb->length %d\n", tsb->length);
3099 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3100 " tsb->flags %x\n", tsb->flags);
3101 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3102 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3103 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3104 " tsb->count %d\n", tsb->count);
3105 residual = tsb->count - 28;
3106 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3107 " residual %d\n", residual);
3108
3109 switch (tsb->flags & 0x07) {
3110 case 1: /* tsa_iostat */
3111 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3112 " tsb->tsa.iostat.dev_time %d\n",
3113 tsb->tsa.iostat.dev_time);
3114 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3115 " tsb->tsa.iostat.def_time %d\n",
3116 tsb->tsa.iostat.def_time);
3117 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3118 " tsb->tsa.iostat.queue_time %d\n",
3119 tsb->tsa.iostat.queue_time);
3120 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3121 " tsb->tsa.iostat.dev_busy_time %d\n",
3122 tsb->tsa.iostat.dev_busy_time);
3123 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3124 " tsb->tsa.iostat.dev_act_time %d\n",
3125 tsb->tsa.iostat.dev_act_time);
3126 sense = tsb->tsa.iostat.sense;
3127 break;
3128 case 2: /* ts_ddpc */
3129 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3130 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3131 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3132 " tsb->tsa.ddpc.rcq: ");
3133 for (sl = 0; sl < 16; sl++) {
3134 for (sct = 0; sct < 8; sct++) {
3135 len += sprintf(page + len, " %02x",
3136 tsb->tsa.ddpc.rcq[sl]);
3137 }
3138 len += sprintf(page + len, "\n");
3139 }
3140 sense = tsb->tsa.ddpc.sense;
3141 break;
3142 case 3: /* tsa_intrg */
3143 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3144 " tsb->tsa.intrg.: not supportet yet \n");
3145 break;
3146 }
3147
3148 if (sense) {
3149 for (sl = 0; sl < 4; sl++) {
3150 len += sprintf(page + len,
3151 KERN_ERR PRINTK_HEADER
3152 " Sense(hex) %2d-%2d:",
3153 (8 * sl), ((8 * sl) + 7));
3154 for (sct = 0; sct < 8; sct++) {
3155 len += sprintf(page + len, " %02x",
3156 sense[8 * sl + sct]);
3157 }
3158 len += sprintf(page + len, "\n");
3159 }
3160
3161 if (sense[27] & DASD_SENSE_BIT_0) {
3162 /* 24 Byte Sense Data */
3163 sprintf(page + len, KERN_ERR PRINTK_HEADER
3164 " 24 Byte: %x MSG %x, "
3165 "%s MSGb to SYSOP\n",
3166 sense[7] >> 4, sense[7] & 0x0f,
3167 sense[1] & 0x10 ? "" : "no");
3168 } else {
3169 /* 32 Byte Sense Data */
3170 sprintf(page + len, KERN_ERR PRINTK_HEADER
3171 " 32 Byte: Format: %x "
3172 "Exception class %x\n",
3173 sense[6] & 0x0f, sense[22] >> 4);
3174 }
3175 } else {
3176 sprintf(page + len, KERN_ERR PRINTK_HEADER
3177 " SORRY - NO VALID SENSE AVAILABLE\n");
3178 }
3179 } else {
3180 sprintf(page + len, KERN_ERR PRINTK_HEADER
3181 " SORRY - NO TSB DATA AVAILABLE\n");
3182 }
3183 printk("%s", page);
3184 free_page((unsigned long) page);
3185 }
3186
3187 static void dasd_eckd_dump_sense(struct dasd_device *device,
3188 struct dasd_ccw_req *req, struct irb *irb)
3189 {
3190 if (req && scsw_is_tm(&req->irb.scsw))
3191 dasd_eckd_dump_sense_tcw(device, req, irb);
3192 else
3193 dasd_eckd_dump_sense_ccw(device, req, irb);
3194 }
3195
3196 int dasd_eckd_pm_freeze(struct dasd_device *device)
3197 {
3198 /*
3199 * the device should be disconnected from our LCU structure
3200 * on restore we will reconnect it and reread LCU specific
3201 * information like PAV support that might have changed
3202 */
3203 dasd_alias_remove_device(device);
3204 dasd_alias_disconnect_device_from_lcu(device);
3205
3206 return 0;
3207 }
3208
3209 int dasd_eckd_restore_device(struct dasd_device *device)
3210 {
3211 struct dasd_eckd_private *private;
3212 struct dasd_eckd_characteristics temp_rdc_data;
3213 int is_known, rc;
3214 struct dasd_uid temp_uid;
3215 unsigned long flags;
3216
3217 private = (struct dasd_eckd_private *) device->private;
3218
3219 /* Read Configuration Data */
3220 rc = dasd_eckd_read_conf(device);
3221 if (rc)
3222 goto out_err;
3223
3224 /* Generate device unique id and register in devmap */
3225 rc = dasd_eckd_generate_uid(device, &private->uid);
3226 dasd_get_uid(device->cdev, &temp_uid);
3227 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
3228 dev_err(&device->cdev->dev, "The UID of the DASD has "
3229 "changed\n");
3230 if (rc)
3231 goto out_err;
3232 dasd_set_uid(device->cdev, &private->uid);
3233
3234 /* register lcu with alias handling, enable PAV if this is a new lcu */
3235 is_known = dasd_alias_make_device_known_to_lcu(device);
3236 if (is_known < 0)
3237 return is_known;
3238 if (!is_known) {
3239 /* new lcu found */
3240 rc = dasd_eckd_validate_server(device); /* will switch pav on */
3241 if (rc)
3242 goto out_err;
3243 }
3244
3245 /* Read Feature Codes */
3246 dasd_eckd_read_features(device);
3247
3248 /* Read Device Characteristics */
3249 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
3250 &temp_rdc_data, 64);
3251 if (rc) {
3252 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
3253 "Read device characteristic failed, rc=%d", rc);
3254 goto out_err;
3255 }
3256 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
3257 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
3258 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3259
3260 /* add device to alias management */
3261 dasd_alias_add_device(device);
3262
3263 return 0;
3264
3265 out_err:
3266 return -1;
3267 }
3268
3269 static struct ccw_driver dasd_eckd_driver = {
3270 .name = "dasd-eckd",
3271 .owner = THIS_MODULE,
3272 .ids = dasd_eckd_ids,
3273 .probe = dasd_eckd_probe,
3274 .remove = dasd_generic_remove,
3275 .set_offline = dasd_generic_set_offline,
3276 .set_online = dasd_eckd_set_online,
3277 .notify = dasd_generic_notify,
3278 .freeze = dasd_generic_pm_freeze,
3279 .thaw = dasd_generic_restore_device,
3280 .restore = dasd_generic_restore_device,
3281 };
3282
3283 /*
3284 * max_blocks is dependent on the amount of storage that is available
3285 * in the static io buffer for each device. Currently each device has
3286 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3287 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3288 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3289 * addition we have one define extent ccw + 16 bytes of data and one
3290 * locate record ccw + 16 bytes of data. That makes:
3291 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3292 * We want to fit two into the available memory so that we can immediately
3293 * start the next request if one finishes off. That makes 249.5 blocks
3294 * for one request. Give a little safety and the result is 240.
3295 */
3296 static struct dasd_discipline dasd_eckd_discipline = {
3297 .owner = THIS_MODULE,
3298 .name = "ECKD",
3299 .ebcname = "ECKD",
3300 .max_blocks = 240,
3301 .check_device = dasd_eckd_check_characteristics,
3302 .uncheck_device = dasd_eckd_uncheck_device,
3303 .do_analysis = dasd_eckd_do_analysis,
3304 .ready_to_online = dasd_eckd_ready_to_online,
3305 .online_to_ready = dasd_eckd_online_to_ready,
3306 .fill_geometry = dasd_eckd_fill_geometry,
3307 .start_IO = dasd_start_IO,
3308 .term_IO = dasd_term_IO,
3309 .handle_terminated_request = dasd_eckd_handle_terminated_request,
3310 .format_device = dasd_eckd_format_device,
3311 .erp_action = dasd_eckd_erp_action,
3312 .erp_postaction = dasd_eckd_erp_postaction,
3313 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3314 .build_cp = dasd_eckd_build_alias_cp,
3315 .free_cp = dasd_eckd_free_alias_cp,
3316 .dump_sense = dasd_eckd_dump_sense,
3317 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
3318 .fill_info = dasd_eckd_fill_info,
3319 .ioctl = dasd_eckd_ioctl,
3320 .freeze = dasd_eckd_pm_freeze,
3321 .restore = dasd_eckd_restore_device,
3322 };
3323
3324 static int __init
3325 dasd_eckd_init(void)
3326 {
3327 int ret;
3328
3329 ASCEBC(dasd_eckd_discipline.ebcname, 4);
3330 ret = ccw_driver_register(&dasd_eckd_driver);
3331 if (!ret)
3332 wait_for_device_probe();
3333
3334 return ret;
3335 }
3336
3337 static void __exit
3338 dasd_eckd_cleanup(void)
3339 {
3340 ccw_driver_unregister(&dasd_eckd_driver);
3341 }
3342
3343 module_init(dasd_eckd_init);
3344 module_exit(dasd_eckd_cleanup);
Linux ARM platform port for MOXA ART SoC