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[S390] dasd: improve error recovery for internal I/O
[linux-block.git] / drivers / s390 / block / dasd_eckd.c
CommitLineData
138c014d 1/*
1da177e4
LT		 2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d 4 * Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
d41dd122 8 * Copyright IBM Corp. 1999, 2009
ab1d848f
NH		 9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
1da177e4
LT		 11 */
12
ca99dab0 13#define KMSG_COMPONENT "dasd-eckd"
fc19f381 14
1da177e4
LT		 15#include <linux/stddef.h>
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/hdreg.h> /* HDIO_GETGEO */
19#include <linux/bio.h>
20#include <linux/module.h>
21#include <linux/init.h>
22
23#include <asm/debug.h>
24#include <asm/idals.h>
25#include <asm/ebcdic.h>
26#include <asm/io.h>
1da177e4 27#include <asm/uaccess.h>
40545573 28#include <asm/cio.h>
1da177e4 29#include <asm/ccwdev.h>
f3eb5384 30#include <asm/itcw.h>
1da177e4
LT		 31
32#include "dasd_int.h"
33#include "dasd_eckd.h"
f3eb5384
SW		 34#include "../cio/chsc.h"
35
1da177e4
LT		 36
37#ifdef PRINTK_HEADER
38#undef PRINTK_HEADER
39#endif /* PRINTK_HEADER */
40#define PRINTK_HEADER "dasd(eckd):"
41
42#define ECKD_C0(i) (i->home_bytes)
43#define ECKD_F(i) (i->formula)
44#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
45 (i->factors.f_0x02.f1))
46#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
47 (i->factors.f_0x02.f2))
48#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
49 (i->factors.f_0x02.f3))
50#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
51#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
52#define ECKD_F6(i) (i->factor6)
53#define ECKD_F7(i) (i->factor7)
54#define ECKD_F8(i) (i->factor8)
55
56MODULE_LICENSE("GPL");
57
58static struct dasd_discipline dasd_eckd_discipline;
59
1da177e4
LT		 60/* The ccw bus type uses this table to find devices that it sends to
61 * dasd_eckd_probe */
62static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 63 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
64 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
65 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
66 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
67 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
68 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
69 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
70 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
71 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
72 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 73 { /* end of list */ },
74};
75
76MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
77
78static struct ccw_driver dasd_eckd_driver; /* see below */
79
eb6e199b
SW		 80#define INIT_CQR_OK 0
81#define INIT_CQR_UNFORMATTED 1
82#define INIT_CQR_ERROR 2
83
84
1da177e4
LT		 85/* initial attempt at a probe function. this can be simplified once
86 * the other detection code is gone */
87static int
88dasd_eckd_probe (struct ccw_device *cdev)
89{
90 int ret;
91
40545573 92 /* set ECKD specific ccw-device options */
454e1fa1
PO		 93 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
94 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 95 if (ret) {
fc19f381 96 DBF_EVENT(DBF_WARNING,
40545573 97 "dasd_eckd_probe: could not set ccw-device options "
2a0217d5 98 "for %s\n", dev_name(&cdev->dev));
1da177e4 99 return ret;
40545573
HH		 100 }
101 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
102 return ret;
1da177e4
LT		 103}
104
105static int
106dasd_eckd_set_online(struct ccw_device *cdev)
107{
40545573 108 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 109}
110
1da177e4
LT		 111static const int sizes_trk0[] = { 28, 148, 84 };
112#define LABEL_SIZE 140
113
114static inline unsigned int
115round_up_multiple(unsigned int no, unsigned int mult)
116{
117 int rem = no % mult;
118 return (rem ? no - rem + mult : no);
119}
120
121static inline unsigned int
122ceil_quot(unsigned int d1, unsigned int d2)
123{
124 return (d1 + (d2 - 1)) / d2;
125}
126
4d284cac 127static unsigned int
1da177e4
LT		 128recs_per_track(struct dasd_eckd_characteristics * rdc,
129 unsigned int kl, unsigned int dl)
130{
131 int dn, kn;
132
133 switch (rdc->dev_type) {
134 case 0x3380:
135 if (kl)
136 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
137 ceil_quot(dl + 12, 32));
138 else
139 return 1499 / (15 + ceil_quot(dl + 12, 32));
140 case 0x3390:
141 dn = ceil_quot(dl + 6, 232) + 1;
142 if (kl) {
143 kn = ceil_quot(kl + 6, 232) + 1;
144 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
145 9 + ceil_quot(dl + 6 * dn, 34));
146 } else
147 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
148 case 0x9345:
149 dn = ceil_quot(dl + 6, 232) + 1;
150 if (kl) {
151 kn = ceil_quot(kl + 6, 232) + 1;
152 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
153 ceil_quot(dl + 6 * dn, 34));
154 } else
155 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
156 }
157 return 0;
158}
159
b44b0ab3
SW		 160static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
161{
162 geo->cyl = (__u16) cyl;
163 geo->head = cyl >> 16;
164 geo->head <<= 4;
165 geo->head |= head;
166}
167
4d284cac 168static int
1da177e4
LT		 169check_XRC (struct ccw1 *de_ccw,
170 struct DE_eckd_data *data,
171 struct dasd_device *device)
172{
173 struct dasd_eckd_private *private;
d54853ef 174 int rc;
1da177e4
LT		 175
176 private = (struct dasd_eckd_private *) device->private;
d54853ef
MS		 177 if (!private->rdc_data.facilities.XRC_supported)
178 return 0;
1da177e4
LT		 179
180 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 181 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
182 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 183
d54853ef
MS		 184 rc = get_sync_clock(&data->ep_sys_time);
185 /* Ignore return code if sync clock is switched off. */
186 if (rc == -ENOSYS || rc == -EACCES)
187 rc = 0;
1da177e4 188
8e09f215 189 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 190 de_ccw->flags |= CCW_FLAG_SLI;
191 return rc;
192}
1da177e4 193
4d284cac 194static int
b44b0ab3
SW		 195define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
196 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4
LT		 197{
198 struct dasd_eckd_private *private;
b44b0ab3
SW		 199 u32 begcyl, endcyl;
200 u16 heads, beghead, endhead;
d54853ef 201 int rc = 0;
1da177e4
LT		 202
203 private = (struct dasd_eckd_private *) device->private;
204
205 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
206 ccw->flags = 0;
207 ccw->count = 16;
208 ccw->cda = (__u32) __pa(data);
209
8e09f215 210 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 211 switch (cmd) {
212 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
213 case DASD_ECKD_CCW_READ_RECORD_ZERO:
214 case DASD_ECKD_CCW_READ:
215 case DASD_ECKD_CCW_READ_MT:
216 case DASD_ECKD_CCW_READ_CKD:
217 case DASD_ECKD_CCW_READ_CKD_MT:
218 case DASD_ECKD_CCW_READ_KD:
219 case DASD_ECKD_CCW_READ_KD_MT:
220 case DASD_ECKD_CCW_READ_COUNT:
221 data->mask.perm = 0x1;
222 data->attributes.operation = private->attrib.operation;
223 break;
224 case DASD_ECKD_CCW_WRITE:
225 case DASD_ECKD_CCW_WRITE_MT:
226 case DASD_ECKD_CCW_WRITE_KD:
227 case DASD_ECKD_CCW_WRITE_KD_MT:
228 data->mask.perm = 0x02;
229 data->attributes.operation = private->attrib.operation;
d54853ef 230 rc = check_XRC (ccw, data, device);
1da177e4
LT		 231 break;
232 case DASD_ECKD_CCW_WRITE_CKD:
233 case DASD_ECKD_CCW_WRITE_CKD_MT:
234 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 235 rc = check_XRC (ccw, data, device);
1da177e4
LT		 236 break;
237 case DASD_ECKD_CCW_ERASE:
238 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
239 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
240 data->mask.perm = 0x3;
241 data->mask.auth = 0x1;
242 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 243 rc = check_XRC (ccw, data, device);
1da177e4
LT		 244 break;
245 default:
fc19f381
SH		 246 dev_err(&device->cdev->dev,
247 "0x%x is not a known command\n", cmd);
1da177e4
LT		 248 break;
249 }
250
251 data->attributes.mode = 0x3; /* ECKD */
252
253 if ((private->rdc_data.cu_type == 0x2105 ||
254 private->rdc_data.cu_type == 0x2107 ||
255 private->rdc_data.cu_type == 0x1750)
256 && !(private->uses_cdl && trk < 2))
257 data->ga_extended |= 0x40; /* Regular Data Format Mode */
258
b44b0ab3
SW		 259 heads = private->rdc_data.trk_per_cyl;
260 begcyl = trk / heads;
261 beghead = trk % heads;
262 endcyl = totrk / heads;
263 endhead = totrk % heads;
1da177e4
LT		 264
265 /* check for sequential prestage - enhance cylinder range */
266 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
267 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 268
b44b0ab3
SW		 269 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
270 endcyl += private->attrib.nr_cyl;
1da177e4 271 else
b44b0ab3 272 endcyl = (private->real_cyl - 1);
1da177e4
LT		 273 }
274
b44b0ab3
SW		 275 set_ch_t(&data->beg_ext, begcyl, beghead);
276 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 277 return rc;
1da177e4
LT		 278}
279
8e09f215
SW		 280static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
281 struct dasd_device *device)
282{
283 struct dasd_eckd_private *private;
284 int rc;
285
286 private = (struct dasd_eckd_private *) device->private;
287 if (!private->rdc_data.facilities.XRC_supported)
288 return 0;
289
290 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 291 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
292 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 293 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
294
f3eb5384 295 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215
SW		 296 /* Ignore return code if sync clock is switched off. */
297 if (rc == -ENOSYS || rc == -EACCES)
298 rc = 0;
299 return rc;
300}
301
f3eb5384
SW		 302static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
303 unsigned int rec_on_trk, int count, int cmd,
304 struct dasd_device *device, unsigned int reclen,
305 unsigned int tlf)
306{
307 struct dasd_eckd_private *private;
308 int sector;
309 int dn, d;
310
311 private = (struct dasd_eckd_private *) device->private;
312
313 memset(data, 0, sizeof(*data));
314 sector = 0;
315 if (rec_on_trk) {
316 switch (private->rdc_data.dev_type) {
317 case 0x3390:
318 dn = ceil_quot(reclen + 6, 232);
319 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
320 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
321 break;
322 case 0x3380:
323 d = 7 + ceil_quot(reclen + 12, 32);
324 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
325 break;
326 }
327 }
328 data->sector = sector;
329 /* note: meaning of count depends on the operation
330 * for record based I/O it's the number of records, but for
331 * track based I/O it's the number of tracks
332 */
333 data->count = count;
334 switch (cmd) {
335 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
336 data->operation.orientation = 0x3;
337 data->operation.operation = 0x03;
338 break;
339 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
340 data->operation.orientation = 0x3;
341 data->operation.operation = 0x16;
342 break;
343 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
344 data->operation.orientation = 0x1;
345 data->operation.operation = 0x03;
346 data->count++;
347 break;
348 case DASD_ECKD_CCW_READ_RECORD_ZERO:
349 data->operation.orientation = 0x3;
350 data->operation.operation = 0x16;
351 data->count++;
352 break;
353 case DASD_ECKD_CCW_WRITE:
354 case DASD_ECKD_CCW_WRITE_MT:
355 case DASD_ECKD_CCW_WRITE_KD:
356 case DASD_ECKD_CCW_WRITE_KD_MT:
357 data->auxiliary.length_valid = 0x1;
358 data->length = reclen;
359 data->operation.operation = 0x01;
360 break;
361 case DASD_ECKD_CCW_WRITE_CKD:
362 case DASD_ECKD_CCW_WRITE_CKD_MT:
363 data->auxiliary.length_valid = 0x1;
364 data->length = reclen;
365 data->operation.operation = 0x03;
366 break;
367 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
368 data->auxiliary.length_valid = 0x1;
369 data->length = reclen; /* not tlf, as one might think */
370 data->operation.operation = 0x3F;
371 data->extended_operation = 0x23;
372 break;
373 case DASD_ECKD_CCW_READ:
374 case DASD_ECKD_CCW_READ_MT:
375 case DASD_ECKD_CCW_READ_KD:
376 case DASD_ECKD_CCW_READ_KD_MT:
377 data->auxiliary.length_valid = 0x1;
378 data->length = reclen;
379 data->operation.operation = 0x06;
380 break;
381 case DASD_ECKD_CCW_READ_CKD:
382 case DASD_ECKD_CCW_READ_CKD_MT:
383 data->auxiliary.length_valid = 0x1;
384 data->length = reclen;
385 data->operation.operation = 0x16;
386 break;
387 case DASD_ECKD_CCW_READ_COUNT:
388 data->operation.operation = 0x06;
389 break;
390 case DASD_ECKD_CCW_READ_TRACK_DATA:
391 data->auxiliary.length_valid = 0x1;
392 data->length = tlf;
393 data->operation.operation = 0x0C;
394 break;
395 case DASD_ECKD_CCW_ERASE:
396 data->length = reclen;
397 data->auxiliary.length_valid = 0x1;
398 data->operation.operation = 0x0b;
399 break;
400 default:
401 DBF_DEV_EVENT(DBF_ERR, device,
402 "fill LRE unknown opcode 0x%x", cmd);
403 BUG();
404 }
405 set_ch_t(&data->seek_addr,
406 trk / private->rdc_data.trk_per_cyl,
407 trk % private->rdc_data.trk_per_cyl);
408 data->search_arg.cyl = data->seek_addr.cyl;
409 data->search_arg.head = data->seek_addr.head;
410 data->search_arg.record = rec_on_trk;
411}
412
413static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
414 unsigned int trk, unsigned int totrk, int cmd,
415 struct dasd_device *basedev, struct dasd_device *startdev,
416 unsigned char format, unsigned int rec_on_trk, int count,
417 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 418{
419 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 420 struct DE_eckd_data *dedata;
421 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 422 u32 begcyl, endcyl;
423 u16 heads, beghead, endhead;
8e09f215
SW		 424 int rc = 0;
425
426 basepriv = (struct dasd_eckd_private *) basedev->private;
427 startpriv = (struct dasd_eckd_private *) startdev->private;
f3eb5384
SW		 428 dedata = &pfxdata->define_extent;
429 lredata = &pfxdata->locate_record;
8e09f215
SW		 430
431 ccw->cmd_code = DASD_ECKD_CCW_PFX;
432 ccw->flags = 0;
433 ccw->count = sizeof(*pfxdata);
434 ccw->cda = (__u32) __pa(pfxdata);
435
436 memset(pfxdata, 0, sizeof(*pfxdata));
437 /* prefix data */
f3eb5384
SW		 438 if (format > 1) {
439 DBF_DEV_EVENT(DBF_ERR, basedev,
440 "PFX LRE unknown format 0x%x", format);
441 BUG();
442 return -EINVAL;
443 }
444 pfxdata->format = format;
4abb08c2
SW		 445 pfxdata->base_address = basepriv->ned->unit_addr;
446 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 447 pfxdata->validity.define_extent = 1;
8e09f215
SW		 448
449 /* private uid is kept up to date, conf_data may be outdated */
450 if (startpriv->uid.type != UA_BASE_DEVICE) {
451 pfxdata->validity.verify_base = 1;
452 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
453 pfxdata->validity.hyper_pav = 1;
454 }
455
456 /* define extend data (mostly)*/
457 switch (cmd) {
458 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
459 case DASD_ECKD_CCW_READ_RECORD_ZERO:
460 case DASD_ECKD_CCW_READ:
461 case DASD_ECKD_CCW_READ_MT:
462 case DASD_ECKD_CCW_READ_CKD:
463 case DASD_ECKD_CCW_READ_CKD_MT:
464 case DASD_ECKD_CCW_READ_KD:
465 case DASD_ECKD_CCW_READ_KD_MT:
466 case DASD_ECKD_CCW_READ_COUNT:
f3eb5384
SW		 467 dedata->mask.perm = 0x1;
468 dedata->attributes.operation = basepriv->attrib.operation;
469 break;
470 case DASD_ECKD_CCW_READ_TRACK_DATA:
471 dedata->mask.perm = 0x1;
472 dedata->attributes.operation = basepriv->attrib.operation;
473 dedata->blk_size = 0;
8e09f215
SW		 474 break;
475 case DASD_ECKD_CCW_WRITE:
476 case DASD_ECKD_CCW_WRITE_MT:
477 case DASD_ECKD_CCW_WRITE_KD:
478 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 479 dedata->mask.perm = 0x02;
480 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 481 rc = check_XRC_on_prefix(pfxdata, basedev);
482 break;
483 case DASD_ECKD_CCW_WRITE_CKD:
484 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 485 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 486 rc = check_XRC_on_prefix(pfxdata, basedev);
487 break;
488 case DASD_ECKD_CCW_ERASE:
489 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
490 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 491 dedata->mask.perm = 0x3;
492 dedata->mask.auth = 0x1;
493 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 494 rc = check_XRC_on_prefix(pfxdata, basedev);
495 break;
f3eb5384
SW		 496 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
497 dedata->mask.perm = 0x02;
498 dedata->attributes.operation = basepriv->attrib.operation;
499 dedata->blk_size = blksize;
500 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 501 break;
f3eb5384
SW		 502 default:
503 DBF_DEV_EVENT(DBF_ERR, basedev,
504 "PFX LRE unknown opcode 0x%x", cmd);
505 BUG();
506 return -EINVAL;
8e09f215
SW		 507 }
508
f3eb5384 509 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 510
511 if ((basepriv->rdc_data.cu_type == 0x2105 ||
512 basepriv->rdc_data.cu_type == 0x2107 ||
513 basepriv->rdc_data.cu_type == 0x1750)
514 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 515 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 516
b44b0ab3
SW		 517 heads = basepriv->rdc_data.trk_per_cyl;
518 begcyl = trk / heads;
519 beghead = trk % heads;
520 endcyl = totrk / heads;
521 endhead = totrk % heads;
8e09f215
SW		 522
523 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 524 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
525 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 526
b44b0ab3
SW		 527 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
528 endcyl += basepriv->attrib.nr_cyl;
8e09f215 529 else
b44b0ab3 530 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 531 }
532
f3eb5384
SW		 533 set_ch_t(&dedata->beg_ext, begcyl, beghead);
534 set_ch_t(&dedata->end_ext, endcyl, endhead);
535
536 if (format == 1) {
537 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
538 basedev, blksize, tlf);
539 }
540
8e09f215
SW		 541 return rc;
542}
543
f3eb5384
SW		 544static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
545 unsigned int trk, unsigned int totrk, int cmd,
546 struct dasd_device *basedev, struct dasd_device *startdev)
547{
548 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
549 0, 0, 0, 0, 0);
550}
551
4d284cac 552static void
b44b0ab3
SW		 553locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
554 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 555 struct dasd_device * device, int reclen)
556{
557 struct dasd_eckd_private *private;
558 int sector;
559 int dn, d;
138c014d 560
1da177e4
LT		 561 private = (struct dasd_eckd_private *) device->private;
562
563 DBF_DEV_EVENT(DBF_INFO, device,
564 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
565 trk, rec_on_trk, no_rec, cmd, reclen);
566
567 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
568 ccw->flags = 0;
569 ccw->count = 16;
570 ccw->cda = (__u32) __pa(data);
571
8e09f215 572 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 573 sector = 0;
574 if (rec_on_trk) {
575 switch (private->rdc_data.dev_type) {
576 case 0x3390:
577 dn = ceil_quot(reclen + 6, 232);
578 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
579 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
580 break;
581 case 0x3380:
582 d = 7 + ceil_quot(reclen + 12, 32);
583 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
584 break;
585 }
586 }
587 data->sector = sector;
588 data->count = no_rec;
589 switch (cmd) {
590 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
591 data->operation.orientation = 0x3;
592 data->operation.operation = 0x03;
593 break;
594 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
595 data->operation.orientation = 0x3;
596 data->operation.operation = 0x16;
597 break;
598 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
599 data->operation.orientation = 0x1;
600 data->operation.operation = 0x03;
601 data->count++;
602 break;
603 case DASD_ECKD_CCW_READ_RECORD_ZERO:
604 data->operation.orientation = 0x3;
605 data->operation.operation = 0x16;
606 data->count++;
607 break;
608 case DASD_ECKD_CCW_WRITE:
609 case DASD_ECKD_CCW_WRITE_MT:
610 case DASD_ECKD_CCW_WRITE_KD:
611 case DASD_ECKD_CCW_WRITE_KD_MT:
612 data->auxiliary.last_bytes_used = 0x1;
613 data->length = reclen;
614 data->operation.operation = 0x01;
615 break;
616 case DASD_ECKD_CCW_WRITE_CKD:
617 case DASD_ECKD_CCW_WRITE_CKD_MT:
618 data->auxiliary.last_bytes_used = 0x1;
619 data->length = reclen;
620 data->operation.operation = 0x03;
621 break;
622 case DASD_ECKD_CCW_READ:
623 case DASD_ECKD_CCW_READ_MT:
624 case DASD_ECKD_CCW_READ_KD:
625 case DASD_ECKD_CCW_READ_KD_MT:
626 data->auxiliary.last_bytes_used = 0x1;
627 data->length = reclen;
628 data->operation.operation = 0x06;
629 break;
630 case DASD_ECKD_CCW_READ_CKD:
631 case DASD_ECKD_CCW_READ_CKD_MT:
632 data->auxiliary.last_bytes_used = 0x1;
633 data->length = reclen;
634 data->operation.operation = 0x16;
635 break;
636 case DASD_ECKD_CCW_READ_COUNT:
637 data->operation.operation = 0x06;
638 break;
639 case DASD_ECKD_CCW_ERASE:
640 data->length = reclen;
641 data->auxiliary.last_bytes_used = 0x1;
642 data->operation.operation = 0x0b;
643 break;
644 default:
fc19f381
SH		 645 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
646 "opcode 0x%x", cmd);
1da177e4 647 }
b44b0ab3
SW		 648 set_ch_t(&data->seek_addr,
649 trk / private->rdc_data.trk_per_cyl,
650 trk % private->rdc_data.trk_per_cyl);
651 data->search_arg.cyl = data->seek_addr.cyl;
652 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 653 data->search_arg.record = rec_on_trk;
654}
655
656/*
657 * Returns 1 if the block is one of the special blocks that needs
658 * to get read/written with the KD variant of the command.
659 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
660 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
661 * Luckily the KD variants differ only by one bit (0x08) from the
662 * normal variant. So don't wonder about code like:
663 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
664 * ccw->cmd_code |= 0x8;
665 */
666static inline int
667dasd_eckd_cdl_special(int blk_per_trk, int recid)
668{
669 if (recid < 3)
670 return 1;
671 if (recid < blk_per_trk)
672 return 0;
673 if (recid < 2 * blk_per_trk)
674 return 1;
675 return 0;
676}
677
678/*
679 * Returns the record size for the special blocks of the cdl format.
680 * Only returns something useful if dasd_eckd_cdl_special is true
681 * for the recid.
682 */
683static inline int
684dasd_eckd_cdl_reclen(int recid)
685{
686 if (recid < 3)
687 return sizes_trk0[recid];
688 return LABEL_SIZE;
689}
690
3d052595
HH		 691/*
692 * Generate device unique id that specifies the physical device.
693 */
4abb08c2
SW		 694static int dasd_eckd_generate_uid(struct dasd_device *device,
695 struct dasd_uid *uid)
3d052595
HH		 696{
697 struct dasd_eckd_private *private;
4abb08c2 698 int count;
3d052595
HH		 699
700 private = (struct dasd_eckd_private *) device->private;
701 if (!private)
702 return -ENODEV;
4abb08c2 703 if (!private->ned || !private->gneq)
3d052595
HH		 704 return -ENODEV;
705
706 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 707 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 708 sizeof(uid->vendor) - 1);
3d052595 709 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 710 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 711 sizeof(uid->serial) - 1);
3d052595 712 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 713 uid->ssid = private->gneq->subsystemID;
a419aef8 714 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 715 if (private->sneq) {
716 uid->type = private->sneq->sua_flags;
8e09f215 717 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 718 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 719 } else {
720 uid->type = UA_BASE_DEVICE;
721 }
4abb08c2
SW		 722 if (private->vdsneq) {
723 for (count = 0; count < 16; count++) {
724 sprintf(uid->vduit+2*count, "%02x",
725 private->vdsneq->uit[count]);
726 }
727 }
3d052595
HH		 728 return 0;
729}
730
763968e2
HC		 731static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
732 void *rcd_buffer,
733 struct ciw *ciw, __u8 lpm)
17283b56
CH		 734{
735 struct dasd_ccw_req *cqr;
736 struct ccw1 *ccw;
737
68b781fe
SH		 738 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count,
739 device);
17283b56
CH		 740
741 if (IS_ERR(cqr)) {
fc19f381
SH		 742 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
743 "Could not allocate RCD request");
17283b56
CH		 744 return cqr;
745 }
746
747 ccw = cqr->cpaddr;
748 ccw->cmd_code = ciw->cmd;
749 ccw->cda = (__u32)(addr_t)rcd_buffer;
750 ccw->count = ciw->count;
751
8e09f215
SW		 752 cqr->startdev = device;
753 cqr->memdev = device;
754 cqr->block = NULL;
17283b56
CH		 755 cqr->expires = 10*HZ;
756 cqr->lpm = lpm;
eb6e199b 757 cqr->retries = 256;
17283b56
CH		 758 cqr->buildclk = get_clock();
759 cqr->status = DASD_CQR_FILLED;
760 return cqr;
761}
762
763static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
764 void **rcd_buffer,
765 int *rcd_buffer_size, __u8 lpm)
766{
767 struct ciw *ciw;
768 char *rcd_buf = NULL;
769 int ret;
770 struct dasd_ccw_req *cqr;
771
772 /*
773 * scan for RCD command in extended SenseID data
774 */
775 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
776 if (!ciw || ciw->cmd == 0) {
777 ret = -EOPNOTSUPP;
778 goto out_error;
779 }
780 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
781 if (!rcd_buf) {
782 ret = -ENOMEM;
783 goto out_error;
784 }
4abb08c2
SW		 785
786 /*
787 * buffer has to start with EBCDIC "V1.0" to show
788 * support for virtual device SNEQ
789 */
790 rcd_buf[0] = 0xE5;
791 rcd_buf[1] = 0xF1;
792 rcd_buf[2] = 0x4B;
793 rcd_buf[3] = 0xF0;
17283b56
CH		 794 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
795 if (IS_ERR(cqr)) {
796 ret = PTR_ERR(cqr);
797 goto out_error;
798 }
799 ret = dasd_sleep_on(cqr);
800 /*
801 * on success we update the user input parms
802 */
8e09f215 803 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 804 if (ret)
805 goto out_error;
806
807 *rcd_buffer_size = ciw->count;
808 *rcd_buffer = rcd_buf;
809 return 0;
810out_error:
811 kfree(rcd_buf);
812 *rcd_buffer = NULL;
813 *rcd_buffer_size = 0;
814 return ret;
815}
816
4abb08c2
SW		 817static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
818{
819
820 struct dasd_sneq *sneq;
821 int i, count;
822
823 private->ned = NULL;
824 private->sneq = NULL;
825 private->vdsneq = NULL;
826 private->gneq = NULL;
827 count = private->conf_len / sizeof(struct dasd_sneq);
828 sneq = (struct dasd_sneq *)private->conf_data;
829 for (i = 0; i < count; ++i) {
830 if (sneq->flags.identifier == 1 && sneq->format == 1)
831 private->sneq = sneq;
832 else if (sneq->flags.identifier == 1 && sneq->format == 4)
833 private->vdsneq = (struct vd_sneq *)sneq;
834 else if (sneq->flags.identifier == 2)
835 private->gneq = (struct dasd_gneq *)sneq;
836 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
837 private->ned = (struct dasd_ned *)sneq;
838 sneq++;
839 }
840 if (!private->ned || !private->gneq) {
841 private->ned = NULL;
842 private->sneq = NULL;
843 private->vdsneq = NULL;
844 private->gneq = NULL;
845 return -EINVAL;
846 }
847 return 0;
848
849};
850
851static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
852{
853 struct dasd_gneq *gneq;
854 int i, count, found;
855
856 count = conf_len / sizeof(*gneq);
857 gneq = (struct dasd_gneq *)conf_data;
858 found = 0;
859 for (i = 0; i < count; ++i) {
860 if (gneq->flags.identifier == 2) {
861 found = 1;
862 break;
863 }
864 gneq++;
865 }
866 if (found)
867 return ((char *)gneq)[18] & 0x07;
868 else
869 return 0;
870}
871
872static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 873{
874 void *conf_data;
875 int conf_len, conf_data_saved;
876 int rc;
877 __u8 lpm;
878 struct dasd_eckd_private *private;
879 struct dasd_eckd_path *path_data;
880
881 private = (struct dasd_eckd_private *) device->private;
882 path_data = (struct dasd_eckd_path *) &private->path_data;
883 path_data->opm = ccw_device_get_path_mask(device->cdev);
884 lpm = 0x80;
885 conf_data_saved = 0;
1da177e4
LT		 886 /* get configuration data per operational path */
887 for (lpm = 0x80; lpm; lpm>>= 1) {
888 if (lpm & path_data->opm){
17283b56
CH		 889 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
890 &conf_len, lpm);
1da177e4 891 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
fc19f381
SH		 892 DBF_EVENT(DBF_WARNING,
893 "Read configuration data returned "
894 "error %d for device: %s", rc,
895 dev_name(&device->cdev->dev));
1da177e4
LT		 896 return rc;
897 }
898 if (conf_data == NULL) {
fc19f381
SH		 899 DBF_EVENT(DBF_WARNING, "No configuration "
900 "data retrieved for device: %s",
901 dev_name(&device->cdev->dev));
d133a960 902 continue; /* no error */
1da177e4 903 }
1da177e4 904 /* save first valid configuration data */
4abb08c2
SW		 905 if (!conf_data_saved) {
906 kfree(private->conf_data);
907 private->conf_data = conf_data;
908 private->conf_len = conf_len;
909 if (dasd_eckd_identify_conf_parts(private)) {
910 private->conf_data = NULL;
911 private->conf_len = 0;
912 kfree(conf_data);
913 continue;
914 }
1da177e4
LT		 915 conf_data_saved++;
916 }
4abb08c2 917 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1da177e4
LT		 918 case 0x02:
919 path_data->npm |= lpm;
920 break;
921 case 0x03:
922 path_data->ppm |= lpm;
923 break;
924 }
4abb08c2
SW		 925 if (conf_data != private->conf_data)
926 kfree(conf_data);
1da177e4
LT		 927 }
928 }
929 return 0;
930}
931
8e09f215
SW		 932static int dasd_eckd_read_features(struct dasd_device *device)
933{
934 struct dasd_psf_prssd_data *prssdp;
935 struct dasd_rssd_features *features;
936 struct dasd_ccw_req *cqr;
937 struct ccw1 *ccw;
938 int rc;
939 struct dasd_eckd_private *private;
940
941 private = (struct dasd_eckd_private *) device->private;
68d1e5f0 942 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 943 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 944 (sizeof(struct dasd_psf_prssd_data) +
945 sizeof(struct dasd_rssd_features)),
946 device);
947 if (IS_ERR(cqr)) {
fc19f381
SH		 948 DBF_EVENT(DBF_WARNING, "Could not allocate initialization "
949 "request for device: %s",
950 dev_name(&device->cdev->dev));
8e09f215
SW		 951 return PTR_ERR(cqr);
952 }
953 cqr->startdev = device;
954 cqr->memdev = device;
955 cqr->block = NULL;
eb6e199b 956 cqr->retries = 256;
8e09f215
SW		 957 cqr->expires = 10 * HZ;
958
959 /* Prepare for Read Subsystem Data */
960 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
961 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
962 prssdp->order = PSF_ORDER_PRSSD;
963 prssdp->suborder = 0x41; /* Read Feature Codes */
964 /* all other bytes of prssdp must be zero */
965
966 ccw = cqr->cpaddr;
967 ccw->cmd_code = DASD_ECKD_CCW_PSF;
968 ccw->count = sizeof(struct dasd_psf_prssd_data);
969 ccw->flags |= CCW_FLAG_CC;
970 ccw->cda = (__u32)(addr_t) prssdp;
971
972 /* Read Subsystem Data - feature codes */
973 features = (struct dasd_rssd_features *) (prssdp + 1);
974 memset(features, 0, sizeof(struct dasd_rssd_features));
975
976 ccw++;
977 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
978 ccw->count = sizeof(struct dasd_rssd_features);
979 ccw->cda = (__u32)(addr_t) features;
980
981 cqr->buildclk = get_clock();
982 cqr->status = DASD_CQR_FILLED;
983 rc = dasd_sleep_on(cqr);
984 if (rc == 0) {
985 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
986 features = (struct dasd_rssd_features *) (prssdp + 1);
987 memcpy(&private->features, features,
988 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 989 } else
990 dev_warn(&device->cdev->dev, "Reading device feature codes"
991 " failed with rc=%d\n", rc);
8e09f215
SW		 992 dasd_sfree_request(cqr, cqr->memdev);
993 return rc;
994}
995
996
40545573
HH		 997/*
998 * Build CP for Perform Subsystem Function - SSC.
999 */
f3eb5384
SW		 1000static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1001 int enable_pav)
40545573 1002{
8e09f215
SW		 1003 struct dasd_ccw_req *cqr;
1004 struct dasd_psf_ssc_data *psf_ssc_data;
1005 struct ccw1 *ccw;
40545573 1006
68b781fe 1007 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1008 sizeof(struct dasd_psf_ssc_data),
1009 device);
1010
8e09f215 1011 if (IS_ERR(cqr)) {
fc19f381 1012 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1013 "Could not allocate PSF-SSC request");
8e09f215
SW		 1014 return cqr;
1015 }
1016 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1017 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1018 psf_ssc_data->suborder = 0xc0;
f3eb5384 1019 if (enable_pav) {
626350b6 1020 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1021 psf_ssc_data->reserved[0] = 0x88;
1022 }
8e09f215
SW		 1023 ccw = cqr->cpaddr;
1024 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1025 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1026 ccw->count = 66;
1027
1028 cqr->startdev = device;
1029 cqr->memdev = device;
1030 cqr->block = NULL;
eb6e199b 1031 cqr->retries = 256;
8e09f215
SW		 1032 cqr->expires = 10*HZ;
1033 cqr->buildclk = get_clock();
1034 cqr->status = DASD_CQR_FILLED;
1035 return cqr;
40545573
HH		 1036}
1037
1038/*
1039 * Perform Subsystem Function.
1040 * It is necessary to trigger CIO for channel revalidation since this
1041 * call might change behaviour of DASD devices.
1042 */
1043static int
f3eb5384 1044dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
40545573 1045{
8e09f215
SW		 1046 struct dasd_ccw_req *cqr;
1047 int rc;
1048
f3eb5384 1049 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1050 if (IS_ERR(cqr))
1051 return PTR_ERR(cqr);
1052
1053 rc = dasd_sleep_on(cqr);
1054 if (!rc)
1055 /* trigger CIO to reprobe devices */
1056 css_schedule_reprobe();
1057 dasd_sfree_request(cqr, cqr->memdev);
1058 return rc;
40545573
HH		 1059}
1060
1061/*
1062 * Valide storage server of current device.
1063 */
8e09f215 1064static int dasd_eckd_validate_server(struct dasd_device *device)
40545573
HH		 1065{
1066 int rc;
8e09f215 1067 struct dasd_eckd_private *private;
f3eb5384 1068 int enable_pav;
40545573 1069
40545573 1070 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1071 enable_pav = 0;
1072 else
1073 enable_pav = 1;
1074 rc = dasd_eckd_psf_ssc(device, enable_pav);
eb6e199b 1075
8e79a441
HH		 1076 /* may be requested feature is not available on server,
1077 * therefore just report error and go ahead */
8e09f215 1078 private = (struct dasd_eckd_private *) device->private;
fc19f381
SH		 1079 DBF_EVENT(DBF_WARNING, "PSF-SSC on storage subsystem %s.%s.%04x "
1080 "returned rc=%d for device: %s",
1081 private->uid.vendor, private->uid.serial,
1082 private->uid.ssid, rc, dev_name(&device->cdev->dev));
40545573
HH		 1083 /* RE-Read Configuration Data */
1084 return dasd_eckd_read_conf(device);
1085}
1086
3d052595
HH		 1087/*
1088 * Check device characteristics.
1089 * If the device is accessible using ECKD discipline, the device is enabled.
1090 */
1da177e4
LT		 1091static int
1092dasd_eckd_check_characteristics(struct dasd_device *device)
1093{
1094 struct dasd_eckd_private *private;
8e09f215 1095 struct dasd_block *block;
8e09f215 1096 int is_known, rc;
1da177e4 1097
454e1fa1
PO		 1098 if (!ccw_device_is_pathgroup(device->cdev)) {
1099 dev_warn(&device->cdev->dev,
1100 "A channel path group could not be established\n");
1101 return -EIO;
1102 }
1103 if (!ccw_device_is_multipath(device->cdev)) {
1104 dev_info(&device->cdev->dev,
1105 "The DASD is not operating in multipath mode\n");
1106 }
1da177e4 1107 private = (struct dasd_eckd_private *) device->private;
92636b15
SO		 1108 if (!private) {
1109 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1110 if (!private) {
fc19f381
SH		 1111 dev_warn(&device->cdev->dev,
1112 "Allocating memory for private DASD data "
1113 "failed\n");
1da177e4
LT		 1114 return -ENOMEM;
1115 }
1da177e4 1116 device->private = (void *) private;
92636b15
SO		 1117 } else {
1118 memset(private, 0, sizeof(*private));
1da177e4
LT		 1119 }
1120 /* Invalidate status of initial analysis. */
1121 private->init_cqr_status = -1;
1122 /* Set default cache operations. */
1123 private->attrib.operation = DASD_NORMAL_CACHE;
1124 private->attrib.nr_cyl = 0;
1125
40545573
HH		 1126 /* Read Configuration Data */
1127 rc = dasd_eckd_read_conf(device);
1128 if (rc)
8e09f215 1129 goto out_err1;
40545573
HH		 1130
1131 /* Generate device unique id and register in devmap */
8e09f215 1132 rc = dasd_eckd_generate_uid(device, &private->uid);
40545573 1133 if (rc)
8e09f215
SW		 1134 goto out_err1;
1135 dasd_set_uid(device->cdev, &private->uid);
1136
1137 if (private->uid.type == UA_BASE_DEVICE) {
1138 block = dasd_alloc_block();
1139 if (IS_ERR(block)) {
fc19f381
SH		 1140 DBF_EVENT(DBF_WARNING, "could not allocate dasd "
1141 "block structure for device: %s",
1142 dev_name(&device->cdev->dev));
8e09f215
SW		 1143 rc = PTR_ERR(block);
1144 goto out_err1;
1145 }
1146 device->block = block;
1147 block->base = device;
1148 }
1149
1150 /* register lcu with alias handling, enable PAV if this is a new lcu */
1151 is_known = dasd_alias_make_device_known_to_lcu(device);
1152 if (is_known < 0) {
1153 rc = is_known;
1154 goto out_err2;
1155 }
1156 if (!is_known) {
1157 /* new lcu found */
1158 rc = dasd_eckd_validate_server(device); /* will switch pav on */
1159 if (rc)
1160 goto out_err3;
1161 }
1162
1163 /* Read Feature Codes */
68d1e5f0 1164 dasd_eckd_read_features(device);
40545573 1165
1da177e4 1166 /* Read Device Characteristics */
68b781fe
SH		 1167 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1168 &private->rdc_data, 64);
8e09f215 1169 if (rc) {
fc19f381
SH		 1170 DBF_EVENT(DBF_WARNING,
1171 "Read device characteristics failed, rc=%d for "
1172 "device: %s", rc, dev_name(&device->cdev->dev));
8e09f215
SW		 1173 goto out_err3;
1174 }
b44b0ab3
SW		 1175 /* find the vaild cylinder size */
1176 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1177 private->rdc_data.long_no_cyl)
1178 private->real_cyl = private->rdc_data.long_no_cyl;
1179 else
1180 private->real_cyl = private->rdc_data.no_cyl;
1181
fc19f381
SH		 1182 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1183 "with %d cylinders, %d heads, %d sectors\n",
1184 private->rdc_data.dev_type,
1185 private->rdc_data.dev_model,
1186 private->rdc_data.cu_type,
1187 private->rdc_data.cu_model.model,
92636b15 1188 private->real_cyl,
fc19f381
SH		 1189 private->rdc_data.trk_per_cyl,
1190 private->rdc_data.sec_per_trk);
8e09f215
SW		 1191 return 0;
1192
1193out_err3:
1194 dasd_alias_disconnect_device_from_lcu(device);
1195out_err2:
1196 dasd_free_block(device->block);
1197 device->block = NULL;
1198out_err1:
4abb08c2 1199 kfree(private->conf_data);
8e09f215
SW		 1200 kfree(device->private);
1201 device->private = NULL;
3d052595 1202 return rc;
1da177e4
LT		 1203}
1204
8e09f215
SW		 1205static void dasd_eckd_uncheck_device(struct dasd_device *device)
1206{
4abb08c2
SW		 1207 struct dasd_eckd_private *private;
1208
1209 private = (struct dasd_eckd_private *) device->private;
8e09f215 1210 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1211 private->ned = NULL;
1212 private->sneq = NULL;
1213 private->vdsneq = NULL;
1214 private->gneq = NULL;
1215 private->conf_len = 0;
1216 kfree(private->conf_data);
1217 private->conf_data = NULL;
8e09f215
SW		 1218}
1219
1da177e4
LT		 1220static struct dasd_ccw_req *
1221dasd_eckd_analysis_ccw(struct dasd_device *device)
1222{
1223 struct dasd_eckd_private *private;
1224 struct eckd_count *count_data;
1225 struct LO_eckd_data *LO_data;
1226 struct dasd_ccw_req *cqr;
1227 struct ccw1 *ccw;
1228 int cplength, datasize;
1229 int i;
1230
1231 private = (struct dasd_eckd_private *) device->private;
1232
1233 cplength = 8;
1234 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1235 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1236 if (IS_ERR(cqr))
1237 return cqr;
1238 ccw = cqr->cpaddr;
1239 /* Define extent for the first 3 tracks. */
1240 define_extent(ccw++, cqr->data, 0, 2,
1241 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1242 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1243 /* Locate record for the first 4 records on track 0. */
1244 ccw[-1].flags |= CCW_FLAG_CC;
1245 locate_record(ccw++, LO_data++, 0, 0, 4,
1246 DASD_ECKD_CCW_READ_COUNT, device, 0);
1247
1248 count_data = private->count_area;
1249 for (i = 0; i < 4; i++) {
1250 ccw[-1].flags |= CCW_FLAG_CC;
1251 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1252 ccw->flags = 0;
1253 ccw->count = 8;
1254 ccw->cda = (__u32)(addr_t) count_data;
1255 ccw++;
1256 count_data++;
1257 }
1258
1259 /* Locate record for the first record on track 2. */
1260 ccw[-1].flags |= CCW_FLAG_CC;
1261 locate_record(ccw++, LO_data++, 2, 0, 1,
1262 DASD_ECKD_CCW_READ_COUNT, device, 0);
1263 /* Read count ccw. */
1264 ccw[-1].flags |= CCW_FLAG_CC;
1265 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1266 ccw->flags = 0;
1267 ccw->count = 8;
1268 ccw->cda = (__u32)(addr_t) count_data;
1269
8e09f215
SW		 1270 cqr->block = NULL;
1271 cqr->startdev = device;
1272 cqr->memdev = device;
eb6e199b 1273 cqr->retries = 255;
1da177e4
LT		 1274 cqr->buildclk = get_clock();
1275 cqr->status = DASD_CQR_FILLED;
1276 return cqr;
1277}
1278
eb6e199b
SW		 1279/* differentiate between 'no record found' and any other error */
1280static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1281{
1282 char *sense;
1283 if (init_cqr->status == DASD_CQR_DONE)
1284 return INIT_CQR_OK;
1285 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1286 init_cqr->status == DASD_CQR_FAILED) {
1287 sense = dasd_get_sense(&init_cqr->irb);
1288 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1289 return INIT_CQR_UNFORMATTED;
1290 else
1291 return INIT_CQR_ERROR;
1292 } else
1293 return INIT_CQR_ERROR;
1294}
1295
1da177e4
LT		 1296/*
1297 * This is the callback function for the init_analysis cqr. It saves
1298 * the status of the initial analysis ccw before it frees it and kicks
1299 * the device to continue the startup sequence. This will call
1300 * dasd_eckd_do_analysis again (if the devices has not been marked
1301 * for deletion in the meantime).
1302 */
eb6e199b
SW		 1303static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1304 void *data)
1da177e4
LT		 1305{
1306 struct dasd_eckd_private *private;
1307 struct dasd_device *device;
1308
8e09f215 1309 device = init_cqr->startdev;
1da177e4 1310 private = (struct dasd_eckd_private *) device->private;
eb6e199b 1311 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1312 dasd_sfree_request(init_cqr, device);
1313 dasd_kick_device(device);
1314}
1315
eb6e199b 1316static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4
LT		 1317{
1318 struct dasd_eckd_private *private;
1319 struct dasd_ccw_req *init_cqr;
1320
8e09f215
SW		 1321 private = (struct dasd_eckd_private *) block->base->private;
1322 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1323 if (IS_ERR(init_cqr))
1324 return PTR_ERR(init_cqr);
1325 init_cqr->callback = dasd_eckd_analysis_callback;
1326 init_cqr->callback_data = NULL;
1327 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1328 /* first try without ERP, so we can later handle unformatted
1329 * devices as special case
1330 */
1331 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1332 init_cqr->retries = 0;
1da177e4
LT		 1333 dasd_add_request_head(init_cqr);
1334 return -EAGAIN;
1335}
1336
eb6e199b 1337static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1338{
8e09f215 1339 struct dasd_device *device;
1da177e4
LT		 1340 struct dasd_eckd_private *private;
1341 struct eckd_count *count_area;
1342 unsigned int sb, blk_per_trk;
1343 int status, i;
eb6e199b 1344 struct dasd_ccw_req *init_cqr;
1da177e4 1345
8e09f215 1346 device = block->base;
1da177e4
LT		 1347 private = (struct dasd_eckd_private *) device->private;
1348 status = private->init_cqr_status;
1349 private->init_cqr_status = -1;
eb6e199b
SW		 1350 if (status == INIT_CQR_ERROR) {
1351 /* try again, this time with full ERP */
1352 init_cqr = dasd_eckd_analysis_ccw(device);
1353 dasd_sleep_on(init_cqr);
1354 status = dasd_eckd_analysis_evaluation(init_cqr);
1355 dasd_sfree_request(init_cqr, device);
1356 }
1357
1358 if (status == INIT_CQR_UNFORMATTED) {
1359 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1360 return -EMEDIUMTYPE;
eb6e199b
SW		 1361 } else if (status == INIT_CQR_ERROR) {
1362 dev_err(&device->cdev->dev,
1363 "Detecting the DASD disk layout failed because "
1364 "of an I/O error\n");
1365 return -EIO;
1da177e4
LT		 1366 }
1367
1368 private->uses_cdl = 1;
1da177e4
LT		 1369 /* Check Track 0 for Compatible Disk Layout */
1370 count_area = NULL;
1371 for (i = 0; i < 3; i++) {
1372 if (private->count_area[i].kl != 4 ||
1373 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1374 private->uses_cdl = 0;
1375 break;
1376 }
1377 }
1378 if (i == 3)
1379 count_area = &private->count_area[4];
1380
1381 if (private->uses_cdl == 0) {
1382 for (i = 0; i < 5; i++) {
1383 if ((private->count_area[i].kl != 0) ||
1384 (private->count_area[i].dl !=
1385 private->count_area[0].dl))
1386 break;
1387 }
1388 if (i == 5)
1389 count_area = &private->count_area[0];
1390 } else {
1391 if (private->count_area[3].record == 1)
fc19f381
SH		 1392 dev_warn(&device->cdev->dev,
1393 "Track 0 has no records following the VTOC\n");
1da177e4
LT		 1394 }
1395 if (count_area != NULL && count_area->kl == 0) {
1396 /* we found notthing violating our disk layout */
1397 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1398 block->bp_block = count_area->dl;
1da177e4 1399 }
8e09f215 1400 if (block->bp_block == 0) {
fc19f381
SH		 1401 dev_warn(&device->cdev->dev,
1402 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1403 return -EMEDIUMTYPE;
1404 }
8e09f215
SW		 1405 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1406 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1407 block->s2b_shift++;
1da177e4 1408
8e09f215 1409 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
b44b0ab3 1410 block->blocks = (private->real_cyl *
1da177e4
LT		 1411 private->rdc_data.trk_per_cyl *
1412 blk_per_trk);
1413
fc19f381
SH		 1414 dev_info(&device->cdev->dev,
1415 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1416 "%s\n", (block->bp_block >> 10),
1417 ((private->real_cyl *
1418 private->rdc_data.trk_per_cyl *
1419 blk_per_trk * (block->bp_block >> 9)) >> 1),
1420 ((blk_per_trk * block->bp_block) >> 10),
1421 private->uses_cdl ?
1422 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 1423
1424 return 0;
1425}
1426
8e09f215 1427static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 1428{
1429 struct dasd_eckd_private *private;
1430
8e09f215 1431 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 1432 if (private->init_cqr_status < 0)
8e09f215 1433 return dasd_eckd_start_analysis(block);
1da177e4 1434 else
8e09f215 1435 return dasd_eckd_end_analysis(block);
1da177e4
LT		 1436}
1437
8e09f215
SW		 1438static int dasd_eckd_ready_to_online(struct dasd_device *device)
1439{
1440 return dasd_alias_add_device(device);
1441};
1442
1443static int dasd_eckd_online_to_ready(struct dasd_device *device)
1444{
1445 return dasd_alias_remove_device(device);
1446};
1447
1da177e4 1448static int
8e09f215 1449dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 1450{
1451 struct dasd_eckd_private *private;
1452
8e09f215
SW		 1453 private = (struct dasd_eckd_private *) block->base->private;
1454 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 1455 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 1456 0, block->bp_block);
1da177e4
LT		 1457 }
1458 geo->cylinders = private->rdc_data.no_cyl;
1459 geo->heads = private->rdc_data.trk_per_cyl;
1460 return 0;
1461}
1462
1463static struct dasd_ccw_req *
1464dasd_eckd_format_device(struct dasd_device * device,
1465 struct format_data_t * fdata)
1466{
1467 struct dasd_eckd_private *private;
1468 struct dasd_ccw_req *fcp;
1469 struct eckd_count *ect;
1470 struct ccw1 *ccw;
1471 void *data;
b44b0ab3
SW		 1472 int rpt;
1473 struct ch_t address;
1da177e4
LT		 1474 int cplength, datasize;
1475 int i;
f9a28f7b
JBJ		 1476 int intensity = 0;
1477 int r0_perm;
1da177e4
LT		 1478
1479 private = (struct dasd_eckd_private *) device->private;
1480 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
b44b0ab3
SW		 1481 set_ch_t(&address,
1482 fdata->start_unit / private->rdc_data.trk_per_cyl,
1483 fdata->start_unit % private->rdc_data.trk_per_cyl);
1da177e4
LT		 1484
1485 /* Sanity checks. */
1486 if (fdata->start_unit >=
b44b0ab3 1487 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
fc19f381
SH		 1488 dev_warn(&device->cdev->dev, "Start track number %d used in "
1489 "formatting is too big\n", fdata->start_unit);
1da177e4
LT		 1490 return ERR_PTR(-EINVAL);
1491 }
1492 if (fdata->start_unit > fdata->stop_unit) {
fc19f381
SH		 1493 dev_warn(&device->cdev->dev, "Start track %d used in "
1494 "formatting exceeds end track\n", fdata->start_unit);
1da177e4
LT		 1495 return ERR_PTR(-EINVAL);
1496 }
1497 if (dasd_check_blocksize(fdata->blksize) != 0) {
fc19f381
SH		 1498 dev_warn(&device->cdev->dev,
1499 "The DASD cannot be formatted with block size %d\n",
1500 fdata->blksize);
1da177e4
LT		 1501 return ERR_PTR(-EINVAL);
1502 }
1503
1504 /*
1505 * fdata->intensity is a bit string that tells us what to do:
1506 * Bit 0: write record zero
1507 * Bit 1: write home address, currently not supported
1508 * Bit 2: invalidate tracks
1509 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 1510 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 1511 * Only some bit combinations do make sense.
1512 */
f9a28f7b
JBJ		 1513 if (fdata->intensity & 0x10) {
1514 r0_perm = 0;
1515 intensity = fdata->intensity & ~0x10;
1516 } else {
1517 r0_perm = 1;
1518 intensity = fdata->intensity;
1519 }
1520 switch (intensity) {
1da177e4
LT		 1521 case 0x00: /* Normal format */
1522 case 0x08: /* Normal format, use cdl. */
1523 cplength = 2 + rpt;
1524 datasize = sizeof(struct DE_eckd_data) +
1525 sizeof(struct LO_eckd_data) +
1526 rpt * sizeof(struct eckd_count);
1527 break;
1528 case 0x01: /* Write record zero and format track. */
1529 case 0x09: /* Write record zero and format track, use cdl. */
1530 cplength = 3 + rpt;
1531 datasize = sizeof(struct DE_eckd_data) +
1532 sizeof(struct LO_eckd_data) +
1533 sizeof(struct eckd_count) +
1534 rpt * sizeof(struct eckd_count);
1535 break;
1536 case 0x04: /* Invalidate track. */
1537 case 0x0c: /* Invalidate track, use cdl. */
1538 cplength = 3;
1539 datasize = sizeof(struct DE_eckd_data) +
1540 sizeof(struct LO_eckd_data) +
1541 sizeof(struct eckd_count);
1542 break;
1543 default:
fc19f381
SH		 1544 dev_warn(&device->cdev->dev, "An I/O control call used "
1545 "incorrect flags 0x%x\n", fdata->intensity);
1da177e4
LT		 1546 return ERR_PTR(-EINVAL);
1547 }
1548 /* Allocate the format ccw request. */
68b781fe 1549 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1550 if (IS_ERR(fcp))
1551 return fcp;
1552
1553 data = fcp->data;
1554 ccw = fcp->cpaddr;
1555
f9a28f7b 1556 switch (intensity & ~0x08) {
1da177e4
LT		 1557 case 0x00: /* Normal format. */
1558 define_extent(ccw++, (struct DE_eckd_data *) data,
1559 fdata->start_unit, fdata->start_unit,
1560 DASD_ECKD_CCW_WRITE_CKD, device);
f9a28f7b
JBJ		 1561 /* grant subsystem permission to format R0 */
1562 if (r0_perm)
1563 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1da177e4
LT		 1564 data += sizeof(struct DE_eckd_data);
1565 ccw[-1].flags |= CCW_FLAG_CC;
1566 locate_record(ccw++, (struct LO_eckd_data *) data,
1567 fdata->start_unit, 0, rpt,
1568 DASD_ECKD_CCW_WRITE_CKD, device,
1569 fdata->blksize);
1570 data += sizeof(struct LO_eckd_data);
1571 break;
1572 case 0x01: /* Write record zero + format track. */
1573 define_extent(ccw++, (struct DE_eckd_data *) data,
1574 fdata->start_unit, fdata->start_unit,
1575 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1576 device);
1577 data += sizeof(struct DE_eckd_data);
1578 ccw[-1].flags |= CCW_FLAG_CC;
1579 locate_record(ccw++, (struct LO_eckd_data *) data,
1580 fdata->start_unit, 0, rpt + 1,
1581 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
8e09f215 1582 device->block->bp_block);
1da177e4
LT		 1583 data += sizeof(struct LO_eckd_data);
1584 break;
1585 case 0x04: /* Invalidate track. */
1586 define_extent(ccw++, (struct DE_eckd_data *) data,
1587 fdata->start_unit, fdata->start_unit,
1588 DASD_ECKD_CCW_WRITE_CKD, device);
1589 data += sizeof(struct DE_eckd_data);
1590 ccw[-1].flags |= CCW_FLAG_CC;
1591 locate_record(ccw++, (struct LO_eckd_data *) data,
1592 fdata->start_unit, 0, 1,
1593 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1594 data += sizeof(struct LO_eckd_data);
1595 break;
1596 }
f9a28f7b 1597 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 1598 ect = (struct eckd_count *) data;
1599 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1600 ect->cyl = address.cyl;
1601 ect->head = address.head;
1da177e4
LT		 1602 ect->record = 0;
1603 ect->kl = 0;
1604 ect->dl = 8;
1605 ccw[-1].flags |= CCW_FLAG_CC;
1606 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1607 ccw->flags = CCW_FLAG_SLI;
1608 ccw->count = 8;
1609 ccw->cda = (__u32)(addr_t) ect;
1610 ccw++;
1611 }
f9a28f7b 1612 if ((intensity & ~0x08) & 0x04) { /* erase track */
1da177e4
LT		 1613 ect = (struct eckd_count *) data;
1614 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1615 ect->cyl = address.cyl;
1616 ect->head = address.head;
1da177e4
LT		 1617 ect->record = 1;
1618 ect->kl = 0;
1619 ect->dl = 0;
1620 ccw[-1].flags |= CCW_FLAG_CC;
1621 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1622 ccw->flags = CCW_FLAG_SLI;
1623 ccw->count = 8;
1624 ccw->cda = (__u32)(addr_t) ect;
1625 } else { /* write remaining records */
1626 for (i = 0; i < rpt; i++) {
1627 ect = (struct eckd_count *) data;
1628 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1629 ect->cyl = address.cyl;
1630 ect->head = address.head;
1da177e4
LT		 1631 ect->record = i + 1;
1632 ect->kl = 0;
1633 ect->dl = fdata->blksize;
1634 /* Check for special tracks 0-1 when formatting CDL */
f9a28f7b 1635 if ((intensity & 0x08) &&
1da177e4
LT		 1636 fdata->start_unit == 0) {
1637 if (i < 3) {
1638 ect->kl = 4;
1639 ect->dl = sizes_trk0[i] - 4;
138c014d 1640 }
1da177e4 1641 }
f9a28f7b 1642 if ((intensity & 0x08) &&
1da177e4
LT		 1643 fdata->start_unit == 1) {
1644 ect->kl = 44;
1645 ect->dl = LABEL_SIZE - 44;
1646 }
1647 ccw[-1].flags |= CCW_FLAG_CC;
1648 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1649 ccw->flags = CCW_FLAG_SLI;
1650 ccw->count = 8;
1651 ccw->cda = (__u32)(addr_t) ect;
1652 ccw++;
1653 }
1654 }
8e09f215
SW		 1655 fcp->startdev = device;
1656 fcp->memdev = device;
eb6e199b 1657 fcp->retries = 256;
1da177e4
LT		 1658 fcp->buildclk = get_clock();
1659 fcp->status = DASD_CQR_FILLED;
1660 return fcp;
1661}
1662
8e09f215 1663static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 1664{
8e09f215
SW		 1665 cqr->status = DASD_CQR_FILLED;
1666 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1667 dasd_eckd_reset_ccw_to_base_io(cqr);
1668 cqr->startdev = cqr->block->base;
1da177e4 1669 }
8e09f215 1670};
1da177e4
LT		 1671
1672static dasd_erp_fn_t
1673dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1674{
8e09f215 1675 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 1676 struct ccw_device *cdev = device->cdev;
1677
1678 switch (cdev->id.cu_type) {
1679 case 0x3990:
1680 case 0x2105:
1681 case 0x2107:
1682 case 0x1750:
1683 return dasd_3990_erp_action;
1684 case 0x9343:
1685 case 0x3880:
1686 default:
1687 return dasd_default_erp_action;
1688 }
1689}
1690
1691static dasd_erp_fn_t
1692dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1693{
1694 return dasd_default_erp_postaction;
1695}
1696
8e09f215
SW		 1697
1698static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1699 struct irb *irb)
1700{
1701 char mask;
f3eb5384 1702 char *sense = NULL;
8e09f215
SW		 1703
1704 /* first of all check for state change pending interrupt */
1705 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 1706 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
8e09f215
SW		 1707 dasd_generic_handle_state_change(device);
1708 return;
1709 }
1710
1711 /* summary unit check */
f3eb5384 1712 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
23d805b6 1713 (irb->ecw[7] == 0x0D)) {
8e09f215
SW		 1714 dasd_alias_handle_summary_unit_check(device, irb);
1715 return;
1716 }
1717
f3eb5384 1718 sense = dasd_get_sense(irb);
f60c768c 1719 /* service information message SIM */
f3eb5384
SW		 1720 if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1721 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1722 dasd_3990_erp_handle_sim(device, sense);
9d853caf 1723 dasd_schedule_device_bh(device);
f60c768c
SH		 1724 return;
1725 }
1726
f3eb5384
SW		 1727 if ((scsw_cc(&irb->scsw) == 1) &&
1728 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1729 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1730 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
ada3df91
SH		 1731 /* fake irb do nothing, they are handled elsewhere */
1732 dasd_schedule_device_bh(device);
1733 return;
1734 }
8e09f215 1735
f3eb5384 1736 if (!sense) {
ada3df91 1737 /* just report other unsolicited interrupts */
fc19f381 1738 DBF_DEV_EVENT(DBF_ERR, device, "%s",
ada3df91
SH		 1739 "unsolicited interrupt received");
1740 } else {
fc19f381 1741 DBF_DEV_EVENT(DBF_ERR, device, "%s",
ada3df91
SH		 1742 "unsolicited interrupt received "
1743 "(sense available)");
aeec92ca 1744 device->discipline->dump_sense_dbf(device, irb, "unsolicited");
ada3df91
SH		 1745 }
1746
1747 dasd_schedule_device_bh(device);
8e09f215
SW		 1748 return;
1749};
1750
f3eb5384
SW		 1751
1752static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1753 struct dasd_device *startdev,
8e09f215 1754 struct dasd_block *block,
f3eb5384
SW		 1755 struct request *req,
1756 sector_t first_rec,
1757 sector_t last_rec,
1758 sector_t first_trk,
1759 sector_t last_trk,
1760 unsigned int first_offs,
1761 unsigned int last_offs,
1762 unsigned int blk_per_trk,
1763 unsigned int blksize)
1da177e4
LT		 1764{
1765 struct dasd_eckd_private *private;
1766 unsigned long *idaws;
1767 struct LO_eckd_data *LO_data;
1768 struct dasd_ccw_req *cqr;
1769 struct ccw1 *ccw;
5705f702 1770 struct req_iterator iter;
1da177e4
LT		 1771 struct bio_vec *bv;
1772 char *dst;
f3eb5384 1773 unsigned int off;
1da177e4 1774 int count, cidaw, cplength, datasize;
f3eb5384 1775 sector_t recid;
1da177e4 1776 unsigned char cmd, rcmd;
8e09f215
SW		 1777 int use_prefix;
1778 struct dasd_device *basedev;
1da177e4 1779
8e09f215
SW		 1780 basedev = block->base;
1781 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 1782 if (rq_data_dir(req) == READ)
1783 cmd = DASD_ECKD_CCW_READ_MT;
1784 else if (rq_data_dir(req) == WRITE)
1785 cmd = DASD_ECKD_CCW_WRITE_MT;
1786 else
1787 return ERR_PTR(-EINVAL);
f3eb5384 1788
1da177e4
LT		 1789 /* Check struct bio and count the number of blocks for the request. */
1790 count = 0;
1791 cidaw = 0;
5705f702 1792 rq_for_each_segment(bv, req, iter) {
6c92e699
JA		 1793 if (bv->bv_len & (blksize - 1))
1794 /* Eckd can only do full blocks. */
1795 return ERR_PTR(-EINVAL);
8e09f215 1796 count += bv->bv_len >> (block->s2b_shift + 9);
347a8dc3 1797#if defined(CONFIG_64BIT)
6c92e699 1798 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
8e09f215 1799 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1da177e4 1800#endif
1da177e4
LT		 1801 }
1802 /* Paranoia. */
1803 if (count != last_rec - first_rec + 1)
1804 return ERR_PTR(-EINVAL);
8e09f215
SW		 1805
1806 /* use the prefix command if available */
1807 use_prefix = private->features.feature[8] & 0x01;
1808 if (use_prefix) {
1809 /* 1x prefix + number of blocks */
1810 cplength = 2 + count;
1811 /* 1x prefix + cidaws*sizeof(long) */
1812 datasize = sizeof(struct PFX_eckd_data) +
1813 sizeof(struct LO_eckd_data) +
1814 cidaw * sizeof(unsigned long);
1815 } else {
1816 /* 1x define extent + 1x locate record + number of blocks */
1817 cplength = 2 + count;
1818 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1819 datasize = sizeof(struct DE_eckd_data) +
1820 sizeof(struct LO_eckd_data) +
1821 cidaw * sizeof(unsigned long);
1822 }
1da177e4
LT		 1823 /* Find out the number of additional locate record ccws for cdl. */
1824 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1825 if (last_rec >= 2*blk_per_trk)
1826 count = 2*blk_per_trk - first_rec;
1827 cplength += count;
1828 datasize += count*sizeof(struct LO_eckd_data);
1829 }
1830 /* Allocate the ccw request. */
68b781fe
SH		 1831 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1832 startdev);
1da177e4
LT		 1833 if (IS_ERR(cqr))
1834 return cqr;
1835 ccw = cqr->cpaddr;
8e09f215
SW		 1836 /* First ccw is define extent or prefix. */
1837 if (use_prefix) {
1838 if (prefix(ccw++, cqr->data, first_trk,
1839 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1840 /* Clock not in sync and XRC is enabled.
1841 * Try again later.
1842 */
1843 dasd_sfree_request(cqr, startdev);
1844 return ERR_PTR(-EAGAIN);
1845 }
1846 idaws = (unsigned long *) (cqr->data +
1847 sizeof(struct PFX_eckd_data));
1848 } else {
1849 if (define_extent(ccw++, cqr->data, first_trk,
1850 last_trk, cmd, startdev) == -EAGAIN) {
1851 /* Clock not in sync and XRC is enabled.
1852 * Try again later.
1853 */
1854 dasd_sfree_request(cqr, startdev);
1855 return ERR_PTR(-EAGAIN);
1856 }
1857 idaws = (unsigned long *) (cqr->data +
1858 sizeof(struct DE_eckd_data));
d54853ef 1859 }
1da177e4 1860 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 1861 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1862 recid = first_rec;
1863 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1864 /* Only standard blocks so there is just one locate record. */
1865 ccw[-1].flags |= CCW_FLAG_CC;
1866 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 1867 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 1868 }
5705f702 1869 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 1870 dst = page_address(bv->bv_page) + bv->bv_offset;
1871 if (dasd_page_cache) {
1872 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 1873 GFP_DMA | __GFP_NOWARN);
1da177e4
LT		 1874 if (copy && rq_data_dir(req) == WRITE)
1875 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1876 if (copy)
1877 dst = copy + bv->bv_offset;
1878 }
1879 for (off = 0; off < bv->bv_len; off += blksize) {
1880 sector_t trkid = recid;
1881 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1882 rcmd = cmd;
1883 count = blksize;
1884 /* Locate record for cdl special block ? */
1885 if (private->uses_cdl && recid < 2*blk_per_trk) {
1886 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1887 rcmd |= 0x8;
1888 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 1889 if (count < blksize &&
1890 rq_data_dir(req) == READ)
1da177e4
LT		 1891 memset(dst + count, 0xe5,
1892 blksize - count);
1893 }
1894 ccw[-1].flags |= CCW_FLAG_CC;
1895 locate_record(ccw++, LO_data++,
1896 trkid, recoffs + 1,
8e09f215 1897 1, rcmd, basedev, count);
1da177e4
LT		 1898 }
1899 /* Locate record for standard blocks ? */
1900 if (private->uses_cdl && recid == 2*blk_per_trk) {
1901 ccw[-1].flags |= CCW_FLAG_CC;
1902 locate_record(ccw++, LO_data++,
1903 trkid, recoffs + 1,
1904 last_rec - recid + 1,
8e09f215 1905 cmd, basedev, count);
1da177e4
LT		 1906 }
1907 /* Read/write ccw. */
1908 ccw[-1].flags |= CCW_FLAG_CC;
1909 ccw->cmd_code = rcmd;
1910 ccw->count = count;
1911 if (idal_is_needed(dst, blksize)) {
1912 ccw->cda = (__u32)(addr_t) idaws;
1913 ccw->flags = CCW_FLAG_IDA;
1914 idaws = idal_create_words(idaws, dst, blksize);
1915 } else {
1916 ccw->cda = (__u32)(addr_t) dst;
1917 ccw->flags = 0;
1918 }
1919 ccw++;
1920 dst += blksize;
1921 recid++;
1922 }
1923 }
13de227b
HS		 1924 if (blk_noretry_request(req) ||
1925 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 1926 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 1927 cqr->startdev = startdev;
1928 cqr->memdev = startdev;
1929 cqr->block = block;
1da177e4
LT		 1930 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1931 cqr->lpm = private->path_data.ppm;
1932 cqr->retries = 256;
1933 cqr->buildclk = get_clock();
1934 cqr->status = DASD_CQR_FILLED;
1935 return cqr;
1936}
1937
f3eb5384
SW		 1938static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1939 struct dasd_device *startdev,
1940 struct dasd_block *block,
1941 struct request *req,
1942 sector_t first_rec,
1943 sector_t last_rec,
1944 sector_t first_trk,
1945 sector_t last_trk,
1946 unsigned int first_offs,
1947 unsigned int last_offs,
1948 unsigned int blk_per_trk,
1949 unsigned int blksize)
1950{
1951 struct dasd_eckd_private *private;
1952 unsigned long *idaws;
1953 struct dasd_ccw_req *cqr;
1954 struct ccw1 *ccw;
1955 struct req_iterator iter;
1956 struct bio_vec *bv;
1957 char *dst, *idaw_dst;
1958 unsigned int cidaw, cplength, datasize;
1959 unsigned int tlf;
1960 sector_t recid;
1961 unsigned char cmd;
1962 struct dasd_device *basedev;
1963 unsigned int trkcount, count, count_to_trk_end;
1964 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
1965 unsigned char new_track, end_idaw;
1966 sector_t trkid;
1967 unsigned int recoffs;
1968
1969 basedev = block->base;
1970 private = (struct dasd_eckd_private *) basedev->private;
1971 if (rq_data_dir(req) == READ)
1972 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
1973 else if (rq_data_dir(req) == WRITE)
1974 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
1975 else
1976 return ERR_PTR(-EINVAL);
1977
1978 /* Track based I/O needs IDAWs for each page, and not just for
1979 * 64 bit addresses. We need additional idals for pages
1980 * that get filled from two tracks, so we use the number
1981 * of records as upper limit.
1982 */
1983 cidaw = last_rec - first_rec + 1;
1984 trkcount = last_trk - first_trk + 1;
1985
1986 /* 1x prefix + one read/write ccw per track */
1987 cplength = 1 + trkcount;
1988
1989 /* on 31-bit we need space for two 32 bit addresses per page
1990 * on 64-bit one 64 bit address
1991 */
1992 datasize = sizeof(struct PFX_eckd_data) +
1993 cidaw * sizeof(unsigned long long);
1994
1995 /* Allocate the ccw request. */
68b781fe
SH		 1996 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1997 startdev);
f3eb5384
SW		 1998 if (IS_ERR(cqr))
1999 return cqr;
2000 ccw = cqr->cpaddr;
2001 /* transfer length factor: how many bytes to read from the last track */
2002 if (first_trk == last_trk)
2003 tlf = last_offs - first_offs + 1;
2004 else
2005 tlf = last_offs + 1;
2006 tlf *= blksize;
2007
2008 if (prefix_LRE(ccw++, cqr->data, first_trk,
2009 last_trk, cmd, basedev, startdev,
2010 1 /* format */, first_offs + 1,
2011 trkcount, blksize,
2012 tlf) == -EAGAIN) {
2013 /* Clock not in sync and XRC is enabled.
2014 * Try again later.
2015 */
2016 dasd_sfree_request(cqr, startdev);
2017 return ERR_PTR(-EAGAIN);
2018 }
2019
2020 /*
2021 * The translation of request into ccw programs must meet the
2022 * following conditions:
2023 * - all idaws but the first and the last must address full pages
2024 * (or 2K blocks on 31-bit)
2025 * - the scope of a ccw and it's idal ends with the track boundaries
2026 */
2027 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2028 recid = first_rec;
2029 new_track = 1;
2030 end_idaw = 0;
2031 len_to_track_end = 0;
2032 idaw_dst = 0;
2033 idaw_len = 0;
2034 rq_for_each_segment(bv, req, iter) {
2035 dst = page_address(bv->bv_page) + bv->bv_offset;
2036 seg_len = bv->bv_len;
2037 while (seg_len) {
2038 if (new_track) {
2039 trkid = recid;
2040 recoffs = sector_div(trkid, blk_per_trk);
2041 count_to_trk_end = blk_per_trk - recoffs;
2042 count = min((last_rec - recid + 1),
2043 (sector_t)count_to_trk_end);
2044 len_to_track_end = count * blksize;
2045 ccw[-1].flags |= CCW_FLAG_CC;
2046 ccw->cmd_code = cmd;
2047 ccw->count = len_to_track_end;
2048 ccw->cda = (__u32)(addr_t)idaws;
2049 ccw->flags = CCW_FLAG_IDA;
2050 ccw++;
2051 recid += count;
2052 new_track = 0;
52db45c3
SW		 2053 /* first idaw for a ccw may start anywhere */
2054 if (!idaw_dst)
2055 idaw_dst = dst;
f3eb5384 2056 }
52db45c3
SW		 2057 /* If we start a new idaw, we must make sure that it
2058 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2059 * If we continue an idaw, we must make sure that the
2060 * current segment begins where the so far accumulated
2061 * idaw ends
2062 */
52db45c3
SW		 2063 if (!idaw_dst) {
2064 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2065 dasd_sfree_request(cqr, startdev);
2066 return ERR_PTR(-ERANGE);
2067 } else
2068 idaw_dst = dst;
2069 }
f3eb5384
SW		 2070 if ((idaw_dst + idaw_len) != dst) {
2071 dasd_sfree_request(cqr, startdev);
2072 return ERR_PTR(-ERANGE);
2073 }
2074 part_len = min(seg_len, len_to_track_end);
2075 seg_len -= part_len;
2076 dst += part_len;
2077 idaw_len += part_len;
2078 len_to_track_end -= part_len;
2079 /* collected memory area ends on an IDA_BLOCK border,
2080 * -> create an idaw
2081 * idal_create_words will handle cases where idaw_len
2082 * is larger then IDA_BLOCK_SIZE
2083 */
2084 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2085 end_idaw = 1;
2086 /* We also need to end the idaw at track end */
2087 if (!len_to_track_end) {
2088 new_track = 1;
2089 end_idaw = 1;
2090 }
2091 if (end_idaw) {
2092 idaws = idal_create_words(idaws, idaw_dst,
2093 idaw_len);
2094 idaw_dst = 0;
2095 idaw_len = 0;
2096 end_idaw = 0;
2097 }
2098 }
2099 }
2100
2101 if (blk_noretry_request(req) ||
2102 block->base->features & DASD_FEATURE_FAILFAST)
2103 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2104 cqr->startdev = startdev;
2105 cqr->memdev = startdev;
2106 cqr->block = block;
2107 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2108 cqr->lpm = private->path_data.ppm;
2109 cqr->retries = 256;
2110 cqr->buildclk = get_clock();
2111 cqr->status = DASD_CQR_FILLED;
2112 return cqr;
2113}
2114
2115static int prepare_itcw(struct itcw *itcw,
2116 unsigned int trk, unsigned int totrk, int cmd,
2117 struct dasd_device *basedev,
2118 struct dasd_device *startdev,
2119 unsigned int rec_on_trk, int count,
2120 unsigned int blksize,
2121 unsigned int total_data_size,
2122 unsigned int tlf,
2123 unsigned int blk_per_trk)
2124{
2125 struct PFX_eckd_data pfxdata;
2126 struct dasd_eckd_private *basepriv, *startpriv;
2127 struct DE_eckd_data *dedata;
2128 struct LRE_eckd_data *lredata;
2129 struct dcw *dcw;
2130
2131 u32 begcyl, endcyl;
2132 u16 heads, beghead, endhead;
2133 u8 pfx_cmd;
2134
2135 int rc = 0;
2136 int sector = 0;
2137 int dn, d;
2138
2139
2140 /* setup prefix data */
2141 basepriv = (struct dasd_eckd_private *) basedev->private;
2142 startpriv = (struct dasd_eckd_private *) startdev->private;
2143 dedata = &pfxdata.define_extent;
2144 lredata = &pfxdata.locate_record;
2145
2146 memset(&pfxdata, 0, sizeof(pfxdata));
2147 pfxdata.format = 1; /* PFX with LRE */
2148 pfxdata.base_address = basepriv->ned->unit_addr;
2149 pfxdata.base_lss = basepriv->ned->ID;
2150 pfxdata.validity.define_extent = 1;
2151
2152 /* private uid is kept up to date, conf_data may be outdated */
2153 if (startpriv->uid.type != UA_BASE_DEVICE) {
2154 pfxdata.validity.verify_base = 1;
2155 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2156 pfxdata.validity.hyper_pav = 1;
2157 }
2158
2159 switch (cmd) {
2160 case DASD_ECKD_CCW_READ_TRACK_DATA:
2161 dedata->mask.perm = 0x1;
2162 dedata->attributes.operation = basepriv->attrib.operation;
2163 dedata->blk_size = blksize;
2164 dedata->ga_extended |= 0x42;
2165 lredata->operation.orientation = 0x0;
2166 lredata->operation.operation = 0x0C;
2167 lredata->auxiliary.check_bytes = 0x01;
2168 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2169 break;
2170 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2171 dedata->mask.perm = 0x02;
2172 dedata->attributes.operation = basepriv->attrib.operation;
2173 dedata->blk_size = blksize;
2174 rc = check_XRC_on_prefix(&pfxdata, basedev);
2175 dedata->ga_extended |= 0x42;
2176 lredata->operation.orientation = 0x0;
2177 lredata->operation.operation = 0x3F;
2178 lredata->extended_operation = 0x23;
2179 lredata->auxiliary.check_bytes = 0x2;
2180 pfx_cmd = DASD_ECKD_CCW_PFX;
2181 break;
2182 default:
2183 DBF_DEV_EVENT(DBF_ERR, basedev,
2184 "prepare itcw, unknown opcode 0x%x", cmd);
2185 BUG();
2186 break;
2187 }
2188 if (rc)
2189 return rc;
2190
2191 dedata->attributes.mode = 0x3; /* ECKD */
2192
2193 heads = basepriv->rdc_data.trk_per_cyl;
2194 begcyl = trk / heads;
2195 beghead = trk % heads;
2196 endcyl = totrk / heads;
2197 endhead = totrk % heads;
2198
2199 /* check for sequential prestage - enhance cylinder range */
2200 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2201 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2202
2203 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2204 endcyl += basepriv->attrib.nr_cyl;
2205 else
2206 endcyl = (basepriv->real_cyl - 1);
2207 }
2208
2209 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2210 set_ch_t(&dedata->end_ext, endcyl, endhead);
2211
2212 dedata->ep_format = 0x20; /* records per track is valid */
2213 dedata->ep_rec_per_track = blk_per_trk;
2214
2215 if (rec_on_trk) {
2216 switch (basepriv->rdc_data.dev_type) {
2217 case 0x3390:
2218 dn = ceil_quot(blksize + 6, 232);
2219 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2220 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2221 break;
2222 case 0x3380:
2223 d = 7 + ceil_quot(blksize + 12, 32);
2224 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2225 break;
2226 }
2227 }
2228
2229 lredata->auxiliary.length_valid = 1;
2230 lredata->auxiliary.length_scope = 1;
2231 lredata->auxiliary.imbedded_ccw_valid = 1;
2232 lredata->length = tlf;
2233 lredata->imbedded_ccw = cmd;
2234 lredata->count = count;
2235 lredata->sector = sector;
2236 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2237 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2238 lredata->search_arg.head = lredata->seek_addr.head;
2239 lredata->search_arg.record = rec_on_trk;
2240
2241 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2242 &pfxdata, sizeof(pfxdata), total_data_size);
2243
2244 return rc;
2245}
2246
2247static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2248 struct dasd_device *startdev,
2249 struct dasd_block *block,
2250 struct request *req,
2251 sector_t first_rec,
2252 sector_t last_rec,
2253 sector_t first_trk,
2254 sector_t last_trk,
2255 unsigned int first_offs,
2256 unsigned int last_offs,
2257 unsigned int blk_per_trk,
2258 unsigned int blksize)
2259{
2260 struct dasd_eckd_private *private;
2261 struct dasd_ccw_req *cqr;
2262 struct req_iterator iter;
2263 struct bio_vec *bv;
2264 char *dst;
2265 unsigned int trkcount, ctidaw;
2266 unsigned char cmd;
2267 struct dasd_device *basedev;
2268 unsigned int tlf;
2269 struct itcw *itcw;
2270 struct tidaw *last_tidaw = NULL;
2271 int itcw_op;
2272 size_t itcw_size;
2273
2274 basedev = block->base;
2275 private = (struct dasd_eckd_private *) basedev->private;
2276 if (rq_data_dir(req) == READ) {
2277 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2278 itcw_op = ITCW_OP_READ;
2279 } else if (rq_data_dir(req) == WRITE) {
2280 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2281 itcw_op = ITCW_OP_WRITE;
2282 } else
2283 return ERR_PTR(-EINVAL);
2284
2285 /* trackbased I/O needs address all memory via TIDAWs,
2286 * not just for 64 bit addresses. This allows us to map
2287 * each segment directly to one tidaw.
2288 */
2289 trkcount = last_trk - first_trk + 1;
2290 ctidaw = 0;
2291 rq_for_each_segment(bv, req, iter) {
2292 ++ctidaw;
2293 }
2294
2295 /* Allocate the ccw request. */
2296 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 2297 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 2298 if (IS_ERR(cqr))
2299 return cqr;
2300
2301 cqr->cpmode = 1;
2302 cqr->startdev = startdev;
2303 cqr->memdev = startdev;
2304 cqr->block = block;
2305 cqr->expires = 100*HZ;
2306 cqr->buildclk = get_clock();
2307 cqr->status = DASD_CQR_FILLED;
2308 cqr->retries = 10;
2309
2310 /* transfer length factor: how many bytes to read from the last track */
2311 if (first_trk == last_trk)
2312 tlf = last_offs - first_offs + 1;
2313 else
2314 tlf = last_offs + 1;
2315 tlf *= blksize;
2316
2317 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2318 cqr->cpaddr = itcw_get_tcw(itcw);
2319
2320 if (prepare_itcw(itcw, first_trk, last_trk,
2321 cmd, basedev, startdev,
2322 first_offs + 1,
2323 trkcount, blksize,
2324 (last_rec - first_rec + 1) * blksize,
2325 tlf, blk_per_trk) == -EAGAIN) {
2326 /* Clock not in sync and XRC is enabled.
2327 * Try again later.
2328 */
2329 dasd_sfree_request(cqr, startdev);
2330 return ERR_PTR(-EAGAIN);
2331 }
2332
2333 /*
2334 * A tidaw can address 4k of memory, but must not cross page boundaries
2335 * We can let the block layer handle this by setting
2336 * blk_queue_segment_boundary to page boundaries and
2337 * blk_max_segment_size to page size when setting up the request queue.
2338 */
2339 rq_for_each_segment(bv, req, iter) {
2340 dst = page_address(bv->bv_page) + bv->bv_offset;
2341 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2342 if (IS_ERR(last_tidaw))
2343 return (struct dasd_ccw_req *)last_tidaw;
2344 }
2345
2346 last_tidaw->flags |= 0x80;
2347 itcw_finalize(itcw);
2348
2349 if (blk_noretry_request(req) ||
2350 block->base->features & DASD_FEATURE_FAILFAST)
2351 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2352 cqr->startdev = startdev;
2353 cqr->memdev = startdev;
2354 cqr->block = block;
2355 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2356 cqr->lpm = private->path_data.ppm;
2357 cqr->retries = 256;
2358 cqr->buildclk = get_clock();
2359 cqr->status = DASD_CQR_FILLED;
2360 return cqr;
2361}
2362
2363static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2364 struct dasd_block *block,
2365 struct request *req)
2366{
2367 int tpm, cmdrtd, cmdwtd;
2368 int use_prefix;
45b44d76 2369#if defined(CONFIG_64BIT)
f3eb5384 2370 int fcx_in_css, fcx_in_gneq, fcx_in_features;
45b44d76
SW		 2371#endif
2372 struct dasd_eckd_private *private;
f3eb5384
SW		 2373 struct dasd_device *basedev;
2374 sector_t first_rec, last_rec;
2375 sector_t first_trk, last_trk;
2376 unsigned int first_offs, last_offs;
2377 unsigned int blk_per_trk, blksize;
2378 int cdlspecial;
2379 struct dasd_ccw_req *cqr;
2380
2381 basedev = block->base;
2382 private = (struct dasd_eckd_private *) basedev->private;
2383
2384 /* Calculate number of blocks/records per track. */
2385 blksize = block->bp_block;
2386 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 2387 if (blk_per_trk == 0)
2388 return ERR_PTR(-EINVAL);
f3eb5384 2389 /* Calculate record id of first and last block. */
83096ebf 2390 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 2391 first_offs = sector_div(first_trk, blk_per_trk);
2392 last_rec = last_trk =
83096ebf 2393 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 2394 last_offs = sector_div(last_trk, blk_per_trk);
2395 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2396
45b44d76
SW		 2397 /* is transport mode supported? */
2398#if defined(CONFIG_64BIT)
f3eb5384
SW		 2399 fcx_in_css = css_general_characteristics.fcx;
2400 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2401 fcx_in_features = private->features.feature[40] & 0x80;
2402 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
45b44d76
SW		 2403#else
2404 tpm = 0;
2405#endif
f3eb5384
SW		 2406
2407 /* is read track data and write track data in command mode supported? */
2408 cmdrtd = private->features.feature[9] & 0x20;
2409 cmdwtd = private->features.feature[12] & 0x40;
2410 use_prefix = private->features.feature[8] & 0x01;
2411
2412 cqr = NULL;
2413 if (cdlspecial || dasd_page_cache) {
2414 /* do nothing, just fall through to the cmd mode single case */
2415 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2416 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2417 first_rec, last_rec,
2418 first_trk, last_trk,
2419 first_offs, last_offs,
2420 blk_per_trk, blksize);
2421 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2422 cqr = NULL;
2423 } else if (use_prefix &&
2424 (((rq_data_dir(req) == READ) && cmdrtd) ||
2425 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2426 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2427 first_rec, last_rec,
2428 first_trk, last_trk,
2429 first_offs, last_offs,
2430 blk_per_trk, blksize);
2431 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2432 cqr = NULL;
2433 }
2434 if (!cqr)
2435 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2436 first_rec, last_rec,
2437 first_trk, last_trk,
2438 first_offs, last_offs,
2439 blk_per_trk, blksize);
2440 return cqr;
2441}
2442
1da177e4
LT		 2443static int
2444dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2445{
2446 struct dasd_eckd_private *private;
2447 struct ccw1 *ccw;
5705f702 2448 struct req_iterator iter;
1da177e4
LT		 2449 struct bio_vec *bv;
2450 char *dst, *cda;
2451 unsigned int blksize, blk_per_trk, off;
2452 sector_t recid;
5705f702 2453 int status;
1da177e4
LT		 2454
2455 if (!dasd_page_cache)
2456 goto out;
8e09f215
SW		 2457 private = (struct dasd_eckd_private *) cqr->block->base->private;
2458 blksize = cqr->block->bp_block;
1da177e4 2459 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 2460 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 2461 ccw = cqr->cpaddr;
2462 /* Skip over define extent & locate record. */
2463 ccw++;
2464 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2465 ccw++;
5705f702 2466 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 2467 dst = page_address(bv->bv_page) + bv->bv_offset;
2468 for (off = 0; off < bv->bv_len; off += blksize) {
2469 /* Skip locate record. */
2470 if (private->uses_cdl && recid <= 2*blk_per_trk)
2471 ccw++;
2472 if (dst) {
2473 if (ccw->flags & CCW_FLAG_IDA)
2474 cda = *((char **)((addr_t) ccw->cda));
2475 else
2476 cda = (char *)((addr_t) ccw->cda);
2477 if (dst != cda) {
2478 if (rq_data_dir(req) == READ)
2479 memcpy(dst, cda, bv->bv_len);
2480 kmem_cache_free(dasd_page_cache,
2481 (void *)((addr_t)cda & PAGE_MASK));
2482 }
2483 dst = NULL;
2484 }
2485 ccw++;
2486 recid++;
2487 }
2488 }
2489out:
2490 status = cqr->status == DASD_CQR_DONE;
8e09f215 2491 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2492 return status;
2493}
2494
8e09f215 2495/*
f3eb5384 2496 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 2497 *
2498 * Note that this is not enough to restart the cqr!
2499 * Either reset cqr->startdev as well (summary unit check handling)
2500 * or restart via separate cqr (as in ERP handling).
2501 */
2502void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2503{
2504 struct ccw1 *ccw;
2505 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 2506 struct tcw *tcw;
2507 struct tccb *tccb;
2508 struct dcw *dcw;
2509
2510 if (cqr->cpmode == 1) {
2511 tcw = cqr->cpaddr;
2512 tccb = tcw_get_tccb(tcw);
2513 dcw = (struct dcw *)&tccb->tca[0];
2514 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 2515 pfxdata->validity.verify_base = 0;
2516 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 2517 } else {
2518 ccw = cqr->cpaddr;
2519 pfxdata = cqr->data;
2520 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2521 pfxdata->validity.verify_base = 0;
2522 pfxdata->validity.hyper_pav = 0;
2523 }
8e09f215
SW		 2524 }
2525}
2526
2527#define DASD_ECKD_CHANQ_MAX_SIZE 4
2528
2529static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2530 struct dasd_block *block,
2531 struct request *req)
2532{
2533 struct dasd_eckd_private *private;
2534 struct dasd_device *startdev;
2535 unsigned long flags;
2536 struct dasd_ccw_req *cqr;
2537
2538 startdev = dasd_alias_get_start_dev(base);
2539 if (!startdev)
2540 startdev = base;
2541 private = (struct dasd_eckd_private *) startdev->private;
2542 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2543 return ERR_PTR(-EBUSY);
2544
2545 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2546 private->count++;
2547 cqr = dasd_eckd_build_cp(startdev, block, req);
2548 if (IS_ERR(cqr))
2549 private->count--;
2550 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2551 return cqr;
2552}
2553
2554static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2555 struct request *req)
2556{
2557 struct dasd_eckd_private *private;
2558 unsigned long flags;
2559
2560 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2561 private = (struct dasd_eckd_private *) cqr->memdev->private;
2562 private->count--;
2563 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2564 return dasd_eckd_free_cp(cqr, req);
2565}
2566
1da177e4
LT		 2567static int
2568dasd_eckd_fill_info(struct dasd_device * device,
2569 struct dasd_information2_t * info)
2570{
2571 struct dasd_eckd_private *private;
2572
2573 private = (struct dasd_eckd_private *) device->private;
2574 info->label_block = 2;
2575 info->FBA_layout = private->uses_cdl ? 0 : 1;
2576 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2577 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2578 memcpy(info->characteristics, &private->rdc_data,
2579 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 2580 info->confdata_size = min((unsigned long)private->conf_len,
2581 sizeof(info->configuration_data));
2582 memcpy(info->configuration_data, private->conf_data,
2583 info->confdata_size);
1da177e4
LT		 2584 return 0;
2585}
2586
2587/*
2588 * SECTION: ioctl functions for eckd devices.
2589 */
2590
2591/*
2592 * Release device ioctl.
138c014d 2593 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 2594 * (see dasd_eckd_reserve) device.
2595 */
2596static int
1107ccfb 2597dasd_eckd_release(struct dasd_device *device)
1da177e4 2598{
1da177e4
LT		 2599 struct dasd_ccw_req *cqr;
2600 int rc;
f3eb5384 2601 struct ccw1 *ccw;
1da177e4
LT		 2602
2603 if (!capable(CAP_SYS_ADMIN))
2604 return -EACCES;
2605
68b781fe 2606 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 2607 if (IS_ERR(cqr)) {
fc19f381 2608 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2609 "Could not allocate initialization request");
2610 return PTR_ERR(cqr);
2611 }
f3eb5384
SW		 2612 ccw = cqr->cpaddr;
2613 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2614 ccw->flags |= CCW_FLAG_SLI;
2615 ccw->count = 32;
2616 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2617 cqr->startdev = device;
2618 cqr->memdev = device;
1da177e4 2619 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2620 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2621 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2622 cqr->expires = 2 * HZ;
2623 cqr->buildclk = get_clock();
2624 cqr->status = DASD_CQR_FILLED;
2625
2626 rc = dasd_sleep_on_immediatly(cqr);
2627
8e09f215 2628 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2629 return rc;
2630}
2631
2632/*
2633 * Reserve device ioctl.
2634 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 2635 * 'timeout the request'. This leads to a terminate IO if
2636 * the interrupt is outstanding for a certain time.
1da177e4
LT		 2637 */
2638static int
1107ccfb 2639dasd_eckd_reserve(struct dasd_device *device)
1da177e4 2640{
1da177e4
LT		 2641 struct dasd_ccw_req *cqr;
2642 int rc;
f3eb5384 2643 struct ccw1 *ccw;
1da177e4
LT		 2644
2645 if (!capable(CAP_SYS_ADMIN))
2646 return -EACCES;
2647
68b781fe 2648 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 2649 if (IS_ERR(cqr)) {
fc19f381 2650 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2651 "Could not allocate initialization request");
2652 return PTR_ERR(cqr);
2653 }
f3eb5384
SW		 2654 ccw = cqr->cpaddr;
2655 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2656 ccw->flags |= CCW_FLAG_SLI;
2657 ccw->count = 32;
2658 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2659 cqr->startdev = device;
2660 cqr->memdev = device;
1da177e4 2661 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2662 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2663 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2664 cqr->expires = 2 * HZ;
2665 cqr->buildclk = get_clock();
2666 cqr->status = DASD_CQR_FILLED;
2667
2668 rc = dasd_sleep_on_immediatly(cqr);
2669
8e09f215 2670 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2671 return rc;
2672}
2673
2674/*
2675 * Steal lock ioctl - unconditional reserve device.
138c014d 2676 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 2677 * (unconditional reserve)
2678 */
2679static int
1107ccfb 2680dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 2681{
1da177e4
LT		 2682 struct dasd_ccw_req *cqr;
2683 int rc;
f3eb5384 2684 struct ccw1 *ccw;
1da177e4
LT		 2685
2686 if (!capable(CAP_SYS_ADMIN))
2687 return -EACCES;
2688
68b781fe 2689 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 2690 if (IS_ERR(cqr)) {
fc19f381 2691 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2692 "Could not allocate initialization request");
2693 return PTR_ERR(cqr);
2694 }
f3eb5384
SW		 2695 ccw = cqr->cpaddr;
2696 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2697 ccw->flags |= CCW_FLAG_SLI;
2698 ccw->count = 32;
2699 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2700 cqr->startdev = device;
2701 cqr->memdev = device;
1da177e4 2702 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2703 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2704 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2705 cqr->expires = 2 * HZ;
2706 cqr->buildclk = get_clock();
2707 cqr->status = DASD_CQR_FILLED;
2708
2709 rc = dasd_sleep_on_immediatly(cqr);
2710
8e09f215 2711 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2712 return rc;
2713}
2714
2715/*
2716 * Read performance statistics
2717 */
2718static int
1107ccfb 2719dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 2720{
1da177e4
LT		 2721 struct dasd_psf_prssd_data *prssdp;
2722 struct dasd_rssd_perf_stats_t *stats;
2723 struct dasd_ccw_req *cqr;
2724 struct ccw1 *ccw;
2725 int rc;
2726
68b781fe 2727 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 2728 (sizeof(struct dasd_psf_prssd_data) +
2729 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 2730 device);
2731 if (IS_ERR(cqr)) {
fc19f381 2732 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2733 "Could not allocate initialization request");
2734 return PTR_ERR(cqr);
2735 }
8e09f215
SW		 2736 cqr->startdev = device;
2737 cqr->memdev = device;
1da177e4 2738 cqr->retries = 0;
eb6e199b 2739 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 2740 cqr->expires = 10 * HZ;
2741
2742 /* Prepare for Read Subsystem Data */
2743 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 2744 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 2745 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 2746 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 2747 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2748
2749 ccw = cqr->cpaddr;
2750 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 2751 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 2752 ccw->flags |= CCW_FLAG_CC;
2753 ccw->cda = (__u32)(addr_t) prssdp;
2754
2755 /* Read Subsystem Data - Performance Statistics */
2756 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 2757 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 2758
2759 ccw++;
2760 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 2761 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 2762 ccw->cda = (__u32)(addr_t) stats;
2763
2764 cqr->buildclk = get_clock();
2765 cqr->status = DASD_CQR_FILLED;
2766 rc = dasd_sleep_on(cqr);
2767 if (rc == 0) {
1da177e4
LT		 2768 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2769 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 2770 if (copy_to_user(argp, stats,
2771 sizeof(struct dasd_rssd_perf_stats_t)))
2772 rc = -EFAULT;
1da177e4 2773 }
8e09f215 2774 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2775 return rc;
2776}
2777
2778/*
2779 * Get attributes (cache operations)
2780 * Returnes the cache attributes used in Define Extend (DE).
2781 */
2782static int
1107ccfb 2783dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 2784{
1107ccfb
CH		 2785 struct dasd_eckd_private *private =
2786 (struct dasd_eckd_private *)device->private;
2787 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 2788 int rc;
2789
2790 if (!capable(CAP_SYS_ADMIN))
2791 return -EACCES;
1107ccfb 2792 if (!argp)
1da177e4
LT		 2793 return -EINVAL;
2794
1107ccfb
CH		 2795 rc = 0;
2796 if (copy_to_user(argp, (long *) &attrib,
8e09f215 2797 sizeof(struct attrib_data_t)))
1107ccfb 2798 rc = -EFAULT;
1da177e4
LT		 2799
2800 return rc;
2801}
2802
2803/*
2804 * Set attributes (cache operations)
2805 * Stores the attributes for cache operation to be used in Define Extend (DE).
2806 */
2807static int
1107ccfb 2808dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 2809{
1107ccfb
CH		 2810 struct dasd_eckd_private *private =
2811 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 2812 struct attrib_data_t attrib;
2813
2814 if (!capable(CAP_SYS_ADMIN))
2815 return -EACCES;
1107ccfb 2816 if (!argp)
1da177e4
LT		 2817 return -EINVAL;
2818
1107ccfb 2819 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 2820 return -EFAULT;
1da177e4
LT		 2821 private->attrib = attrib;
2822
fc19f381
SH		 2823 dev_info(&device->cdev->dev,
2824 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2825 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 2826 return 0;
2827}
2828
ab1d848f
NH		 2829/*
2830 * Issue syscall I/O to EMC Symmetrix array.
2831 * CCWs are PSF and RSSD
2832 */
2833static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2834{
2835 struct dasd_symmio_parms usrparm;
2836 char *psf_data, *rssd_result;
2837 struct dasd_ccw_req *cqr;
2838 struct ccw1 *ccw;
2839 int rc;
2840
2841 /* Copy parms from caller */
2842 rc = -EFAULT;
2843 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2844 goto out;
2845#ifndef CONFIG_64BIT
2846 /* Make sure pointers are sane even on 31 bit. */
2847 if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
2848 rc = -EINVAL;
2849 goto out;
2850 }
2851#endif
2852 /* alloc I/O data area */
2853 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2854 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2855 if (!psf_data || !rssd_result) {
2856 rc = -ENOMEM;
2857 goto out_free;
2858 }
2859
2860 /* get syscall header from user space */
2861 rc = -EFAULT;
2862 if (copy_from_user(psf_data,
2863 (void __user *)(unsigned long) usrparm.psf_data,
2864 usrparm.psf_data_len))
2865 goto out_free;
2866
2867 /* sanity check on syscall header */
2868 if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
2869 rc = -EINVAL;
2870 goto out_free;
2871 }
2872
2873 /* setup CCWs for PSF + RSSD */
68b781fe 2874 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 2875 if (IS_ERR(cqr)) {
fc19f381 2876 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 2877 "Could not allocate initialization request");
2878 rc = PTR_ERR(cqr);
2879 goto out_free;
2880 }
2881
2882 cqr->startdev = device;
2883 cqr->memdev = device;
2884 cqr->retries = 3;
2885 cqr->expires = 10 * HZ;
2886 cqr->buildclk = get_clock();
2887 cqr->status = DASD_CQR_FILLED;
2888
2889 /* Build the ccws */
2890 ccw = cqr->cpaddr;
2891
2892 /* PSF ccw */
2893 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2894 ccw->count = usrparm.psf_data_len;
2895 ccw->flags |= CCW_FLAG_CC;
2896 ccw->cda = (__u32)(addr_t) psf_data;
2897
2898 ccw++;
2899
2900 /* RSSD ccw */
2901 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2902 ccw->count = usrparm.rssd_result_len;
2903 ccw->flags = CCW_FLAG_SLI ;
2904 ccw->cda = (__u32)(addr_t) rssd_result;
2905
2906 rc = dasd_sleep_on(cqr);
2907 if (rc)
2908 goto out_sfree;
2909
2910 rc = -EFAULT;
2911 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2912 rssd_result, usrparm.rssd_result_len))
2913 goto out_sfree;
2914 rc = 0;
2915
2916out_sfree:
2917 dasd_sfree_request(cqr, cqr->memdev);
2918out_free:
2919 kfree(rssd_result);
2920 kfree(psf_data);
2921out:
2922 DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
2923 return rc;
2924}
2925
1107ccfb 2926static int
8e09f215 2927dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 2928{
8e09f215
SW		 2929 struct dasd_device *device = block->base;
2930
1107ccfb
CH		 2931 switch (cmd) {
2932 case BIODASDGATTR:
2933 return dasd_eckd_get_attrib(device, argp);
2934 case BIODASDSATTR:
2935 return dasd_eckd_set_attrib(device, argp);
2936 case BIODASDPSRD:
2937 return dasd_eckd_performance(device, argp);
2938 case BIODASDRLSE:
2939 return dasd_eckd_release(device);
2940 case BIODASDRSRV:
2941 return dasd_eckd_reserve(device);
2942 case BIODASDSLCK:
2943 return dasd_eckd_steal_lock(device);
ab1d848f
NH		 2944 case BIODASDSYMMIO:
2945 return dasd_symm_io(device, argp);
1107ccfb
CH		 2946 default:
2947 return -ENOIOCTLCMD;
2948 }
2949}
2950
445b5b49
HH		 2951/*
2952 * Dump the range of CCWs into 'page' buffer
2953 * and return number of printed chars.
2954 */
4d284cac 2955static int
445b5b49
HH		 2956dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
2957{
2958 int len, count;
2959 char *datap;
2960
2961 len = 0;
2962 while (from <= to) {
2963 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2964 " CCW %p: %08X %08X DAT:",
2965 from, ((int *) from)[0], ((int *) from)[1]);
2966
2967 /* get pointer to data (consider IDALs) */
2968 if (from->flags & CCW_FLAG_IDA)
2969 datap = (char *) *((addr_t *) (addr_t) from->cda);
2970 else
2971 datap = (char *) ((addr_t) from->cda);
2972
2973 /* dump data (max 32 bytes) */
2974 for (count = 0; count < from->count && count < 32; count++) {
2975 if (count % 8 == 0) len += sprintf(page + len, " ");
2976 if (count % 4 == 0) len += sprintf(page + len, " ");
2977 len += sprintf(page + len, "%02x", datap[count]);
2978 }
2979 len += sprintf(page + len, "\n");
2980 from++;
2981 }
2982 return len;
2983}
2984
fc19f381 2985static void
aeec92ca
SH		 2986dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
2987 char *reason)
fc19f381
SH		 2988{
2989 u64 *sense;
aeec92ca
SH		 2990
2991 sense = (u64 *) dasd_get_sense(irb);
fc19f381 2992 if (sense) {
aeec92ca
SH		 2993 DBF_DEV_EVENT(DBF_EMERG, device,
2994 "%s: %s %02x%02x%02x %016llx %016llx %016llx "
2995 "%016llx", reason,
2996 scsw_is_tm(&irb->scsw) ? "t" : "c",
2997 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
2998 scsw_dstat(&irb->scsw), sense[0], sense[1],
2999 sense[2], sense[3]);
fc19f381
SH		 3000 } else {
3001 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
3002 "SORRY - NO VALID SENSE AVAILABLE\n");
3003 }
3004}
3005
1da177e4
LT		 3006/*
3007 * Print sense data and related channel program.
3008 * Parts are printed because printk buffer is only 1024 bytes.
3009 */
f3eb5384 3010static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 3011 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 3012{
3013 char *page;
445b5b49
HH		 3014 struct ccw1 *first, *last, *fail, *from, *to;
3015 int len, sl, sct;
1da177e4
LT		 3016
3017 page = (char *) get_zeroed_page(GFP_ATOMIC);
3018 if (page == NULL) {
fc19f381
SH		 3019 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3020 "No memory to dump sense data\n");
1da177e4
LT		 3021 return;
3022 }
445b5b49
HH		 3023 /* dump the sense data */
3024 len = sprintf(page, KERN_ERR PRINTK_HEADER
1da177e4 3025 " I/O status report for device %s:\n",
2a0217d5 3026 dev_name(&device->cdev->dev));
1da177e4 3027 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
6cc7f168
SW		 3028 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
3029 req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3030 scsw_cc(&irb->scsw), req->intrc);
1da177e4
LT		 3031 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3032 " device %s: Failing CCW: %p\n",
2a0217d5 3033 dev_name(&device->cdev->dev),
23d805b6 3034 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 3035 if (irb->esw.esw0.erw.cons) {
3036 for (sl = 0; sl < 4; sl++) {
3037 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3038 " Sense(hex) %2d-%2d:",
3039 (8 * sl), ((8 * sl) + 7));
3040
3041 for (sct = 0; sct < 8; sct++) {
3042 len += sprintf(page + len, " %02x",
3043 irb->ecw[8 * sl + sct]);
3044 }
3045 len += sprintf(page + len, "\n");
3046 }
3047
3048 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3049 /* 24 Byte Sense Data */
445b5b49
HH		 3050 sprintf(page + len, KERN_ERR PRINTK_HEADER
3051 " 24 Byte: %x MSG %x, "
3052 "%s MSGb to SYSOP\n",
3053 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3054 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 3055 } else {
3056 /* 32 Byte Sense Data */
445b5b49
HH		 3057 sprintf(page + len, KERN_ERR PRINTK_HEADER
3058 " 32 Byte: Format: %x "
3059 "Exception class %x\n",
3060 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 3061 }
3062 } else {
445b5b49
HH		 3063 sprintf(page + len, KERN_ERR PRINTK_HEADER
3064 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 3065 }
445b5b49
HH		 3066 printk("%s", page);
3067
8e09f215
SW		 3068 if (req) {
3069 /* req == NULL for unsolicited interrupts */
3070 /* dump the Channel Program (max 140 Bytes per line) */
3071 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3072 first = req->cpaddr;
3073 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3074 to = min(first + 6, last);
3075 len = sprintf(page, KERN_ERR PRINTK_HEADER
3076 " Related CP in req: %p\n", req);
3077 dasd_eckd_dump_ccw_range(first, to, page + len);
3078 printk("%s", page);
1da177e4 3079
8e09f215
SW		 3080 /* print failing CCW area (maximum 4) */
3081 /* scsw->cda is either valid or zero */
3082 len = 0;
3083 from = ++to;
23d805b6
PO		 3084 fail = (struct ccw1 *)(addr_t)
3085 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 3086 if (from < fail - 2) {
3087 from = fail - 2; /* there is a gap - print header */
3088 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3089 }
3090 to = min(fail + 1, last);
3091 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3092
3093 /* print last CCWs (maximum 2) */
3094 from = max(from, ++to);
3095 if (from < last - 1) {
3096 from = last - 1; /* there is a gap - print header */
3097 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3098 }
3099 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3100 if (len > 0)
3101 printk("%s", page);
1da177e4 3102 }
1da177e4
LT		 3103 free_page((unsigned long) page);
3104}
3105
f3eb5384
SW		 3106
3107/*
3108 * Print sense data from a tcw.
3109 */
3110static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3111 struct dasd_ccw_req *req, struct irb *irb)
3112{
3113 char *page;
3114 int len, sl, sct, residual;
3115
3116 struct tsb *tsb;
3117 u8 *sense;
3118
3119
3120 page = (char *) get_zeroed_page(GFP_ATOMIC);
3121 if (page == NULL) {
fc19f381 3122 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 3123 "No memory to dump sense data");
3124 return;
3125 }
3126 /* dump the sense data */
3127 len = sprintf(page, KERN_ERR PRINTK_HEADER
3128 " I/O status report for device %s:\n",
3129 dev_name(&device->cdev->dev));
3130 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
6cc7f168 3131 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
f3eb5384
SW		 3132 "fcxs: 0x%02X schxs: 0x%02X\n", req,
3133 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
6cc7f168 3134 scsw_cc(&irb->scsw), req->intrc,
f3eb5384
SW		 3135 irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3136 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3137 " device %s: Failing TCW: %p\n",
3138 dev_name(&device->cdev->dev),
3139 (void *) (addr_t) irb->scsw.tm.tcw);
3140
3141 tsb = NULL;
3142 sense = NULL;
3143 if (irb->scsw.tm.tcw)
3144 tsb = tcw_get_tsb(
3145 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3146
3147 if (tsb && (irb->scsw.tm.fcxs == 0x01)) {
3148 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3149 " tsb->length %d\n", tsb->length);
3150 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3151 " tsb->flags %x\n", tsb->flags);
3152 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3153 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3154 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3155 " tsb->count %d\n", tsb->count);
3156 residual = tsb->count - 28;
3157 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3158 " residual %d\n", residual);
3159
3160 switch (tsb->flags & 0x07) {
3161 case 1: /* tsa_iostat */
3162 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3163 " tsb->tsa.iostat.dev_time %d\n",
3164 tsb->tsa.iostat.dev_time);
3165 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3166 " tsb->tsa.iostat.def_time %d\n",
3167 tsb->tsa.iostat.def_time);
3168 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3169 " tsb->tsa.iostat.queue_time %d\n",
3170 tsb->tsa.iostat.queue_time);
3171 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3172 " tsb->tsa.iostat.dev_busy_time %d\n",
3173 tsb->tsa.iostat.dev_busy_time);
3174 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3175 " tsb->tsa.iostat.dev_act_time %d\n",
3176 tsb->tsa.iostat.dev_act_time);
3177 sense = tsb->tsa.iostat.sense;
3178 break;
3179 case 2: /* ts_ddpc */
3180 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3181 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3182 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3183 " tsb->tsa.ddpc.rcq: ");
3184 for (sl = 0; sl < 16; sl++) {
3185 for (sct = 0; sct < 8; sct++) {
3186 len += sprintf(page + len, " %02x",
3187 tsb->tsa.ddpc.rcq[sl]);
3188 }
3189 len += sprintf(page + len, "\n");
3190 }
3191 sense = tsb->tsa.ddpc.sense;
3192 break;
3193 case 3: /* tsa_intrg */
3194 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3195 " tsb->tsa.intrg.: not supportet yet \n");
3196 break;
3197 }
3198
3199 if (sense) {
3200 for (sl = 0; sl < 4; sl++) {
3201 len += sprintf(page + len,
3202 KERN_ERR PRINTK_HEADER
3203 " Sense(hex) %2d-%2d:",
3204 (8 * sl), ((8 * sl) + 7));
3205 for (sct = 0; sct < 8; sct++) {
3206 len += sprintf(page + len, " %02x",
3207 sense[8 * sl + sct]);
3208 }
3209 len += sprintf(page + len, "\n");
3210 }
3211
3212 if (sense[27] & DASD_SENSE_BIT_0) {
3213 /* 24 Byte Sense Data */
3214 sprintf(page + len, KERN_ERR PRINTK_HEADER
3215 " 24 Byte: %x MSG %x, "
3216 "%s MSGb to SYSOP\n",
3217 sense[7] >> 4, sense[7] & 0x0f,
3218 sense[1] & 0x10 ? "" : "no");
3219 } else {
3220 /* 32 Byte Sense Data */
3221 sprintf(page + len, KERN_ERR PRINTK_HEADER
3222 " 32 Byte: Format: %x "
3223 "Exception class %x\n",
3224 sense[6] & 0x0f, sense[22] >> 4);
3225 }
3226 } else {
3227 sprintf(page + len, KERN_ERR PRINTK_HEADER
3228 " SORRY - NO VALID SENSE AVAILABLE\n");
3229 }
3230 } else {
3231 sprintf(page + len, KERN_ERR PRINTK_HEADER
3232 " SORRY - NO TSB DATA AVAILABLE\n");
3233 }
3234 printk("%s", page);
3235 free_page((unsigned long) page);
3236}
3237
3238static void dasd_eckd_dump_sense(struct dasd_device *device,
3239 struct dasd_ccw_req *req, struct irb *irb)
3240{
3241 if (req && scsw_is_tm(&req->irb.scsw))
3242 dasd_eckd_dump_sense_tcw(device, req, irb);
3243 else
3244 dasd_eckd_dump_sense_ccw(device, req, irb);
3245}
3246
d41dd122
SH		 3247int dasd_eckd_pm_freeze(struct dasd_device *device)
3248{
3249 /*
3250 * the device should be disconnected from our LCU structure
3251 * on restore we will reconnect it and reread LCU specific
3252 * information like PAV support that might have changed
3253 */
3254 dasd_alias_remove_device(device);
3255 dasd_alias_disconnect_device_from_lcu(device);
3256
3257 return 0;
3258}
3259
3260int dasd_eckd_restore_device(struct dasd_device *device)
3261{
3262 struct dasd_eckd_private *private;
6fca97a9 3263 struct dasd_eckd_characteristics temp_rdc_data;
d41dd122
SH		 3264 int is_known, rc;
3265 struct dasd_uid temp_uid;
a7602f6c 3266 unsigned long flags;
d41dd122 3267
d41dd122
SH		 3268 private = (struct dasd_eckd_private *) device->private;
3269
3270 /* Read Configuration Data */
3271 rc = dasd_eckd_read_conf(device);
3272 if (rc)
3273 goto out_err;
3274
3275 /* Generate device unique id and register in devmap */
3276 rc = dasd_eckd_generate_uid(device, &private->uid);
3277 dasd_get_uid(device->cdev, &temp_uid);
3278 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 3279 dev_err(&device->cdev->dev, "The UID of the DASD has "
3280 "changed\n");
d41dd122
SH		 3281 if (rc)
3282 goto out_err;
3283 dasd_set_uid(device->cdev, &private->uid);
3284
3285 /* register lcu with alias handling, enable PAV if this is a new lcu */
3286 is_known = dasd_alias_make_device_known_to_lcu(device);
3287 if (is_known < 0)
3288 return is_known;
3289 if (!is_known) {
3290 /* new lcu found */
3291 rc = dasd_eckd_validate_server(device); /* will switch pav on */
3292 if (rc)
3293 goto out_err;
3294 }
3295
3296 /* Read Feature Codes */
68d1e5f0 3297 dasd_eckd_read_features(device);
d41dd122
SH		 3298
3299 /* Read Device Characteristics */
68b781fe 3300 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 3301 &temp_rdc_data, 64);
d41dd122
SH		 3302 if (rc) {
3303 DBF_EVENT(DBF_WARNING,
3304 "Read device characteristics failed, rc=%d for "
3305 "device: %s", rc, dev_name(&device->cdev->dev));
3306 goto out_err;
3307 }
a7602f6c 3308 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 3309 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 3310 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 3311
3312 /* add device to alias management */
3313 dasd_alias_add_device(device);
3314
3315 return 0;
3316
3317out_err:
e6125fba 3318 return -1;
d41dd122
SH		 3319}
3320
3321static struct ccw_driver dasd_eckd_driver = {
3322 .name = "dasd-eckd",
3323 .owner = THIS_MODULE,
3324 .ids = dasd_eckd_ids,
3325 .probe = dasd_eckd_probe,
3326 .remove = dasd_generic_remove,
3327 .set_offline = dasd_generic_set_offline,
3328 .set_online = dasd_eckd_set_online,
3329 .notify = dasd_generic_notify,
3330 .freeze = dasd_generic_pm_freeze,
3331 .thaw = dasd_generic_restore_device,
3332 .restore = dasd_generic_restore_device,
3333};
f3eb5384 3334
1da177e4
LT		 3335/*
3336 * max_blocks is dependent on the amount of storage that is available
3337 * in the static io buffer for each device. Currently each device has
3338 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3339 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3340 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3341 * addition we have one define extent ccw + 16 bytes of data and one
3342 * locate record ccw + 16 bytes of data. That makes:
3343 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3344 * We want to fit two into the available memory so that we can immediately
3345 * start the next request if one finishes off. That makes 249.5 blocks
3346 * for one request. Give a little safety and the result is 240.
3347 */
3348static struct dasd_discipline dasd_eckd_discipline = {
3349 .owner = THIS_MODULE,
3350 .name = "ECKD",
3351 .ebcname = "ECKD",
3352 .max_blocks = 240,
3353 .check_device = dasd_eckd_check_characteristics,
8e09f215 3354 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 3355 .do_analysis = dasd_eckd_do_analysis,
8e09f215
SW		 3356 .ready_to_online = dasd_eckd_ready_to_online,
3357 .online_to_ready = dasd_eckd_online_to_ready,
1da177e4
LT		 3358 .fill_geometry = dasd_eckd_fill_geometry,
3359 .start_IO = dasd_start_IO,
3360 .term_IO = dasd_term_IO,
8e09f215 3361 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 3362 .format_device = dasd_eckd_format_device,
1da177e4
LT		 3363 .erp_action = dasd_eckd_erp_action,
3364 .erp_postaction = dasd_eckd_erp_postaction,
8e09f215
SW		 3365 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3366 .build_cp = dasd_eckd_build_alias_cp,
3367 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 3368 .dump_sense = dasd_eckd_dump_sense,
fc19f381 3369 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 3370 .fill_info = dasd_eckd_fill_info,
1107ccfb 3371 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 3372 .freeze = dasd_eckd_pm_freeze,
3373 .restore = dasd_eckd_restore_device,
1da177e4
LT		 3374};
3375
3376static int __init
3377dasd_eckd_init(void)
3378{
736e6ea0
SO		 3379 int ret;
3380
1da177e4 3381 ASCEBC(dasd_eckd_discipline.ebcname, 4);
736e6ea0
SO		 3382 ret = ccw_driver_register(&dasd_eckd_driver);
3383 if (!ret)
3384 wait_for_device_probe();
3385
3386 return ret;
1da177e4
LT		 3387}
3388
3389static void __exit
3390dasd_eckd_cleanup(void)
3391{
3392 ccw_driver_unregister(&dasd_eckd_driver);
1da177e4
LT		 3393}
3394
3395module_init(dasd_eckd_init);
3396module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)