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drivers/s390/char/monreader.c: fix error return code
[deliverable/linux.git] / drivers / s390 / block / dasd_eckd.c
CommitLineData
138c014d 1/*
1da177e4 2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d 3 * Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
d41dd122 7 * Copyright IBM Corp. 1999, 2009
ab1d848f
NH		 8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
1da177e4
LT		 10 */
11
ca99dab0 12#define KMSG_COMPONENT "dasd-eckd"
fc19f381 13
1da177e4
LT		 14#include <linux/stddef.h>
15#include <linux/kernel.h>
16#include <linux/slab.h>
17#include <linux/hdreg.h> /* HDIO_GETGEO */
18#include <linux/bio.h>
19#include <linux/module.h>
048cd4e5 20#include <linux/compat.h>
1da177e4
LT		 21#include <linux/init.h>
22
382b7366 23#include <asm/css_chars.h>
1da177e4
LT		 24#include <asm/debug.h>
25#include <asm/idals.h>
26#include <asm/ebcdic.h>
27#include <asm/io.h>
1da177e4 28#include <asm/uaccess.h>
40545573 29#include <asm/cio.h>
1da177e4 30#include <asm/ccwdev.h>
f3eb5384 31#include <asm/itcw.h>
1da177e4
LT		 32
33#include "dasd_int.h"
34#include "dasd_eckd.h"
35
36#ifdef PRINTK_HEADER
37#undef PRINTK_HEADER
38#endif /* PRINTK_HEADER */
39#define PRINTK_HEADER "dasd(eckd):"
40
41#define ECKD_C0(i) (i->home_bytes)
42#define ECKD_F(i) (i->formula)
43#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
44 (i->factors.f_0x02.f1))
45#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
46 (i->factors.f_0x02.f2))
47#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
48 (i->factors.f_0x02.f3))
49#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
50#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
51#define ECKD_F6(i) (i->factor6)
52#define ECKD_F7(i) (i->factor7)
53#define ECKD_F8(i) (i->factor8)
54
e4dbb0f2
SH		 55/*
56 * raw track access always map to 64k in memory
57 * so it maps to 16 blocks of 4k per track
58 */
59#define DASD_RAW_BLOCK_PER_TRACK 16
60#define DASD_RAW_BLOCKSIZE 4096
61/* 64k are 128 x 512 byte sectors */
62#define DASD_RAW_SECTORS_PER_TRACK 128
63
1da177e4
LT		 64MODULE_LICENSE("GPL");
65
66static struct dasd_discipline dasd_eckd_discipline;
67
1da177e4
LT		 68/* The ccw bus type uses this table to find devices that it sends to
69 * dasd_eckd_probe */
70static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 71 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
72 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
5da24b76 73 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
d2c993d8
HC		 74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
76 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
77 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
78 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
79 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
80 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 81 { /* end of list */ },
82};
83
84MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
85
86static struct ccw_driver dasd_eckd_driver; /* see below */
87
eb6e199b
SW		 88#define INIT_CQR_OK 0
89#define INIT_CQR_UNFORMATTED 1
90#define INIT_CQR_ERROR 2
91
f932bcea
SW		 92/* emergency request for reserve/release */
93static struct {
94 struct dasd_ccw_req cqr;
95 struct ccw1 ccw;
96 char data[32];
97} *dasd_reserve_req;
98static DEFINE_MUTEX(dasd_reserve_mutex);
99
a4d26c6a
SW		 100/* definitions for the path verification worker */
101struct path_verification_work_data {
102 struct work_struct worker;
103 struct dasd_device *device;
104 struct dasd_ccw_req cqr;
105 struct ccw1 ccw;
106 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
107 int isglobal;
108 __u8 tbvpm;
109};
110static struct path_verification_work_data *path_verification_worker;
111static DEFINE_MUTEX(dasd_path_verification_mutex);
eb6e199b 112
1da177e4
LT		 113/* initial attempt at a probe function. this can be simplified once
114 * the other detection code is gone */
115static int
116dasd_eckd_probe (struct ccw_device *cdev)
117{
118 int ret;
119
40545573 120 /* set ECKD specific ccw-device options */
454e1fa1
PO		 121 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
122 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 123 if (ret) {
b8ed5dd5
SH		 124 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
125 "dasd_eckd_probe: could not set "
126 "ccw-device options");
1da177e4 127 return ret;
40545573
HH		 128 }
129 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
130 return ret;
1da177e4
LT		 131}
132
133static int
134dasd_eckd_set_online(struct ccw_device *cdev)
135{
40545573 136 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 137}
138
1da177e4
LT		 139static const int sizes_trk0[] = { 28, 148, 84 };
140#define LABEL_SIZE 140
141
142static inline unsigned int
143round_up_multiple(unsigned int no, unsigned int mult)
144{
145 int rem = no % mult;
146 return (rem ? no - rem + mult : no);
147}
148
149static inline unsigned int
150ceil_quot(unsigned int d1, unsigned int d2)
151{
152 return (d1 + (d2 - 1)) / d2;
153}
154
4d284cac 155static unsigned int
1da177e4
LT		 156recs_per_track(struct dasd_eckd_characteristics * rdc,
157 unsigned int kl, unsigned int dl)
158{
159 int dn, kn;
160
161 switch (rdc->dev_type) {
162 case 0x3380:
163 if (kl)
164 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
165 ceil_quot(dl + 12, 32));
166 else
167 return 1499 / (15 + ceil_quot(dl + 12, 32));
168 case 0x3390:
169 dn = ceil_quot(dl + 6, 232) + 1;
170 if (kl) {
171 kn = ceil_quot(kl + 6, 232) + 1;
172 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
173 9 + ceil_quot(dl + 6 * dn, 34));
174 } else
175 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
176 case 0x9345:
177 dn = ceil_quot(dl + 6, 232) + 1;
178 if (kl) {
179 kn = ceil_quot(kl + 6, 232) + 1;
180 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
181 ceil_quot(dl + 6 * dn, 34));
182 } else
183 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
184 }
185 return 0;
186}
187
b44b0ab3
SW		 188static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
189{
190 geo->cyl = (__u16) cyl;
191 geo->head = cyl >> 16;
192 geo->head <<= 4;
193 geo->head |= head;
194}
195
4d284cac 196static int
1da177e4
LT		 197check_XRC (struct ccw1 *de_ccw,
198 struct DE_eckd_data *data,
199 struct dasd_device *device)
200{
201 struct dasd_eckd_private *private;
d54853ef 202 int rc;
1da177e4
LT		 203
204 private = (struct dasd_eckd_private *) device->private;
d54853ef
MS		 205 if (!private->rdc_data.facilities.XRC_supported)
206 return 0;
1da177e4
LT		 207
208 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 209 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
210 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 211
d54853ef
MS		 212 rc = get_sync_clock(&data->ep_sys_time);
213 /* Ignore return code if sync clock is switched off. */
a8f6db4d 214 if (rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 215 rc = 0;
1da177e4 216
8e09f215 217 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 218 de_ccw->flags |= CCW_FLAG_SLI;
219 return rc;
220}
1da177e4 221
4d284cac 222static int
b44b0ab3
SW		 223define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
224 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4
LT		 225{
226 struct dasd_eckd_private *private;
b44b0ab3
SW		 227 u32 begcyl, endcyl;
228 u16 heads, beghead, endhead;
d54853ef 229 int rc = 0;
1da177e4
LT		 230
231 private = (struct dasd_eckd_private *) device->private;
232
233 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
234 ccw->flags = 0;
235 ccw->count = 16;
236 ccw->cda = (__u32) __pa(data);
237
8e09f215 238 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 239 switch (cmd) {
240 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
241 case DASD_ECKD_CCW_READ_RECORD_ZERO:
242 case DASD_ECKD_CCW_READ:
243 case DASD_ECKD_CCW_READ_MT:
244 case DASD_ECKD_CCW_READ_CKD:
245 case DASD_ECKD_CCW_READ_CKD_MT:
246 case DASD_ECKD_CCW_READ_KD:
247 case DASD_ECKD_CCW_READ_KD_MT:
248 case DASD_ECKD_CCW_READ_COUNT:
249 data->mask.perm = 0x1;
250 data->attributes.operation = private->attrib.operation;
251 break;
252 case DASD_ECKD_CCW_WRITE:
253 case DASD_ECKD_CCW_WRITE_MT:
254 case DASD_ECKD_CCW_WRITE_KD:
255 case DASD_ECKD_CCW_WRITE_KD_MT:
256 data->mask.perm = 0x02;
257 data->attributes.operation = private->attrib.operation;
d54853ef 258 rc = check_XRC (ccw, data, device);
1da177e4
LT		 259 break;
260 case DASD_ECKD_CCW_WRITE_CKD:
261 case DASD_ECKD_CCW_WRITE_CKD_MT:
262 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 263 rc = check_XRC (ccw, data, device);
1da177e4
LT		 264 break;
265 case DASD_ECKD_CCW_ERASE:
266 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
267 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
268 data->mask.perm = 0x3;
269 data->mask.auth = 0x1;
270 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 271 rc = check_XRC (ccw, data, device);
1da177e4
LT		 272 break;
273 default:
fc19f381
SH		 274 dev_err(&device->cdev->dev,
275 "0x%x is not a known command\n", cmd);
1da177e4
LT		 276 break;
277 }
278
279 data->attributes.mode = 0x3; /* ECKD */
280
281 if ((private->rdc_data.cu_type == 0x2105 ||
282 private->rdc_data.cu_type == 0x2107 ||
283 private->rdc_data.cu_type == 0x1750)
284 && !(private->uses_cdl && trk < 2))
285 data->ga_extended |= 0x40; /* Regular Data Format Mode */
286
b44b0ab3
SW		 287 heads = private->rdc_data.trk_per_cyl;
288 begcyl = trk / heads;
289 beghead = trk % heads;
290 endcyl = totrk / heads;
291 endhead = totrk % heads;
1da177e4
LT		 292
293 /* check for sequential prestage - enhance cylinder range */
294 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
295 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 296
b44b0ab3
SW		 297 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
298 endcyl += private->attrib.nr_cyl;
1da177e4 299 else
b44b0ab3 300 endcyl = (private->real_cyl - 1);
1da177e4
LT		 301 }
302
b44b0ab3
SW		 303 set_ch_t(&data->beg_ext, begcyl, beghead);
304 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 305 return rc;
1da177e4
LT		 306}
307
8e09f215
SW		 308static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
309 struct dasd_device *device)
310{
311 struct dasd_eckd_private *private;
312 int rc;
313
314 private = (struct dasd_eckd_private *) device->private;
315 if (!private->rdc_data.facilities.XRC_supported)
316 return 0;
317
318 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 319 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
320 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 321 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
322
f3eb5384 323 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215 324 /* Ignore return code if sync clock is switched off. */
a8f6db4d 325 if (rc == -EOPNOTSUPP || rc == -EACCES)
8e09f215
SW		 326 rc = 0;
327 return rc;
328}
329
f3eb5384
SW		 330static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
331 unsigned int rec_on_trk, int count, int cmd,
332 struct dasd_device *device, unsigned int reclen,
333 unsigned int tlf)
334{
335 struct dasd_eckd_private *private;
336 int sector;
337 int dn, d;
338
339 private = (struct dasd_eckd_private *) device->private;
340
341 memset(data, 0, sizeof(*data));
342 sector = 0;
343 if (rec_on_trk) {
344 switch (private->rdc_data.dev_type) {
345 case 0x3390:
346 dn = ceil_quot(reclen + 6, 232);
347 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
348 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
349 break;
350 case 0x3380:
351 d = 7 + ceil_quot(reclen + 12, 32);
352 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
353 break;
354 }
355 }
356 data->sector = sector;
357 /* note: meaning of count depends on the operation
358 * for record based I/O it's the number of records, but for
359 * track based I/O it's the number of tracks
360 */
361 data->count = count;
362 switch (cmd) {
363 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
364 data->operation.orientation = 0x3;
365 data->operation.operation = 0x03;
366 break;
367 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
368 data->operation.orientation = 0x3;
369 data->operation.operation = 0x16;
370 break;
371 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
372 data->operation.orientation = 0x1;
373 data->operation.operation = 0x03;
374 data->count++;
375 break;
376 case DASD_ECKD_CCW_READ_RECORD_ZERO:
377 data->operation.orientation = 0x3;
378 data->operation.operation = 0x16;
379 data->count++;
380 break;
381 case DASD_ECKD_CCW_WRITE:
382 case DASD_ECKD_CCW_WRITE_MT:
383 case DASD_ECKD_CCW_WRITE_KD:
384 case DASD_ECKD_CCW_WRITE_KD_MT:
385 data->auxiliary.length_valid = 0x1;
386 data->length = reclen;
387 data->operation.operation = 0x01;
388 break;
389 case DASD_ECKD_CCW_WRITE_CKD:
390 case DASD_ECKD_CCW_WRITE_CKD_MT:
391 data->auxiliary.length_valid = 0x1;
392 data->length = reclen;
393 data->operation.operation = 0x03;
394 break;
e4dbb0f2
SH		 395 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
396 data->operation.orientation = 0x0;
397 data->operation.operation = 0x3F;
398 data->extended_operation = 0x11;
399 data->length = 0;
400 data->extended_parameter_length = 0x02;
401 if (data->count > 8) {
402 data->extended_parameter[0] = 0xFF;
403 data->extended_parameter[1] = 0xFF;
404 data->extended_parameter[1] <<= (16 - count);
405 } else {
406 data->extended_parameter[0] = 0xFF;
407 data->extended_parameter[0] <<= (8 - count);
408 data->extended_parameter[1] = 0x00;
409 }
410 data->sector = 0xFF;
411 break;
f3eb5384
SW		 412 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
413 data->auxiliary.length_valid = 0x1;
414 data->length = reclen; /* not tlf, as one might think */
415 data->operation.operation = 0x3F;
416 data->extended_operation = 0x23;
417 break;
418 case DASD_ECKD_CCW_READ:
419 case DASD_ECKD_CCW_READ_MT:
420 case DASD_ECKD_CCW_READ_KD:
421 case DASD_ECKD_CCW_READ_KD_MT:
422 data->auxiliary.length_valid = 0x1;
423 data->length = reclen;
424 data->operation.operation = 0x06;
425 break;
426 case DASD_ECKD_CCW_READ_CKD:
427 case DASD_ECKD_CCW_READ_CKD_MT:
428 data->auxiliary.length_valid = 0x1;
429 data->length = reclen;
430 data->operation.operation = 0x16;
431 break;
432 case DASD_ECKD_CCW_READ_COUNT:
433 data->operation.operation = 0x06;
434 break;
e4dbb0f2
SH		 435 case DASD_ECKD_CCW_READ_TRACK:
436 data->operation.orientation = 0x1;
437 data->operation.operation = 0x0C;
438 data->extended_parameter_length = 0;
439 data->sector = 0xFF;
440 break;
f3eb5384
SW		 441 case DASD_ECKD_CCW_READ_TRACK_DATA:
442 data->auxiliary.length_valid = 0x1;
443 data->length = tlf;
444 data->operation.operation = 0x0C;
445 break;
446 case DASD_ECKD_CCW_ERASE:
447 data->length = reclen;
448 data->auxiliary.length_valid = 0x1;
449 data->operation.operation = 0x0b;
450 break;
451 default:
452 DBF_DEV_EVENT(DBF_ERR, device,
453 "fill LRE unknown opcode 0x%x", cmd);
454 BUG();
455 }
456 set_ch_t(&data->seek_addr,
457 trk / private->rdc_data.trk_per_cyl,
458 trk % private->rdc_data.trk_per_cyl);
459 data->search_arg.cyl = data->seek_addr.cyl;
460 data->search_arg.head = data->seek_addr.head;
461 data->search_arg.record = rec_on_trk;
462}
463
464static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
465 unsigned int trk, unsigned int totrk, int cmd,
466 struct dasd_device *basedev, struct dasd_device *startdev,
467 unsigned char format, unsigned int rec_on_trk, int count,
468 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 469{
470 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 471 struct DE_eckd_data *dedata;
472 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 473 u32 begcyl, endcyl;
474 u16 heads, beghead, endhead;
8e09f215
SW		 475 int rc = 0;
476
477 basepriv = (struct dasd_eckd_private *) basedev->private;
478 startpriv = (struct dasd_eckd_private *) startdev->private;
f3eb5384
SW		 479 dedata = &pfxdata->define_extent;
480 lredata = &pfxdata->locate_record;
8e09f215
SW		 481
482 ccw->cmd_code = DASD_ECKD_CCW_PFX;
483 ccw->flags = 0;
e4dbb0f2
SH		 484 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
485 ccw->count = sizeof(*pfxdata) + 2;
486 ccw->cda = (__u32) __pa(pfxdata);
487 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
488 } else {
489 ccw->count = sizeof(*pfxdata);
490 ccw->cda = (__u32) __pa(pfxdata);
491 memset(pfxdata, 0, sizeof(*pfxdata));
492 }
8e09f215 493
8e09f215 494 /* prefix data */
f3eb5384
SW		 495 if (format > 1) {
496 DBF_DEV_EVENT(DBF_ERR, basedev,
497 "PFX LRE unknown format 0x%x", format);
498 BUG();
499 return -EINVAL;
500 }
501 pfxdata->format = format;
4abb08c2
SW		 502 pfxdata->base_address = basepriv->ned->unit_addr;
503 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 504 pfxdata->validity.define_extent = 1;
8e09f215
SW		 505
506 /* private uid is kept up to date, conf_data may be outdated */
507 if (startpriv->uid.type != UA_BASE_DEVICE) {
508 pfxdata->validity.verify_base = 1;
509 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
510 pfxdata->validity.hyper_pav = 1;
511 }
512
513 /* define extend data (mostly)*/
514 switch (cmd) {
515 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
516 case DASD_ECKD_CCW_READ_RECORD_ZERO:
517 case DASD_ECKD_CCW_READ:
518 case DASD_ECKD_CCW_READ_MT:
519 case DASD_ECKD_CCW_READ_CKD:
520 case DASD_ECKD_CCW_READ_CKD_MT:
521 case DASD_ECKD_CCW_READ_KD:
522 case DASD_ECKD_CCW_READ_KD_MT:
523 case DASD_ECKD_CCW_READ_COUNT:
f3eb5384
SW		 524 dedata->mask.perm = 0x1;
525 dedata->attributes.operation = basepriv->attrib.operation;
526 break;
e4dbb0f2 527 case DASD_ECKD_CCW_READ_TRACK:
f3eb5384
SW		 528 case DASD_ECKD_CCW_READ_TRACK_DATA:
529 dedata->mask.perm = 0x1;
530 dedata->attributes.operation = basepriv->attrib.operation;
531 dedata->blk_size = 0;
8e09f215
SW		 532 break;
533 case DASD_ECKD_CCW_WRITE:
534 case DASD_ECKD_CCW_WRITE_MT:
535 case DASD_ECKD_CCW_WRITE_KD:
536 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 537 dedata->mask.perm = 0x02;
538 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 539 rc = check_XRC_on_prefix(pfxdata, basedev);
540 break;
541 case DASD_ECKD_CCW_WRITE_CKD:
542 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 543 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 544 rc = check_XRC_on_prefix(pfxdata, basedev);
545 break;
546 case DASD_ECKD_CCW_ERASE:
547 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
548 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 549 dedata->mask.perm = 0x3;
550 dedata->mask.auth = 0x1;
551 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 552 rc = check_XRC_on_prefix(pfxdata, basedev);
553 break;
e4dbb0f2
SH		 554 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
555 dedata->mask.perm = 0x03;
556 dedata->attributes.operation = basepriv->attrib.operation;
557 dedata->blk_size = 0;
558 break;
f3eb5384
SW		 559 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
560 dedata->mask.perm = 0x02;
561 dedata->attributes.operation = basepriv->attrib.operation;
562 dedata->blk_size = blksize;
563 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 564 break;
f3eb5384
SW		 565 default:
566 DBF_DEV_EVENT(DBF_ERR, basedev,
567 "PFX LRE unknown opcode 0x%x", cmd);
568 BUG();
569 return -EINVAL;
8e09f215
SW		 570 }
571
f3eb5384 572 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 573
574 if ((basepriv->rdc_data.cu_type == 0x2105 ||
575 basepriv->rdc_data.cu_type == 0x2107 ||
576 basepriv->rdc_data.cu_type == 0x1750)
577 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 578 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 579
b44b0ab3
SW		 580 heads = basepriv->rdc_data.trk_per_cyl;
581 begcyl = trk / heads;
582 beghead = trk % heads;
583 endcyl = totrk / heads;
584 endhead = totrk % heads;
8e09f215
SW		 585
586 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 587 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
588 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 589
b44b0ab3
SW		 590 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
591 endcyl += basepriv->attrib.nr_cyl;
8e09f215 592 else
b44b0ab3 593 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 594 }
595
f3eb5384
SW		 596 set_ch_t(&dedata->beg_ext, begcyl, beghead);
597 set_ch_t(&dedata->end_ext, endcyl, endhead);
598
599 if (format == 1) {
600 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
601 basedev, blksize, tlf);
602 }
603
8e09f215
SW		 604 return rc;
605}
606
f3eb5384
SW		 607static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
608 unsigned int trk, unsigned int totrk, int cmd,
609 struct dasd_device *basedev, struct dasd_device *startdev)
610{
611 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
612 0, 0, 0, 0, 0);
613}
614
4d284cac 615static void
b44b0ab3
SW		 616locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
617 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 618 struct dasd_device * device, int reclen)
619{
620 struct dasd_eckd_private *private;
621 int sector;
622 int dn, d;
138c014d 623
1da177e4
LT		 624 private = (struct dasd_eckd_private *) device->private;
625
626 DBF_DEV_EVENT(DBF_INFO, device,
627 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
628 trk, rec_on_trk, no_rec, cmd, reclen);
629
630 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
631 ccw->flags = 0;
632 ccw->count = 16;
633 ccw->cda = (__u32) __pa(data);
634
8e09f215 635 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 636 sector = 0;
637 if (rec_on_trk) {
638 switch (private->rdc_data.dev_type) {
639 case 0x3390:
640 dn = ceil_quot(reclen + 6, 232);
641 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
642 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
643 break;
644 case 0x3380:
645 d = 7 + ceil_quot(reclen + 12, 32);
646 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
647 break;
648 }
649 }
650 data->sector = sector;
651 data->count = no_rec;
652 switch (cmd) {
653 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
654 data->operation.orientation = 0x3;
655 data->operation.operation = 0x03;
656 break;
657 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
658 data->operation.orientation = 0x3;
659 data->operation.operation = 0x16;
660 break;
661 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
662 data->operation.orientation = 0x1;
663 data->operation.operation = 0x03;
664 data->count++;
665 break;
666 case DASD_ECKD_CCW_READ_RECORD_ZERO:
667 data->operation.orientation = 0x3;
668 data->operation.operation = 0x16;
669 data->count++;
670 break;
671 case DASD_ECKD_CCW_WRITE:
672 case DASD_ECKD_CCW_WRITE_MT:
673 case DASD_ECKD_CCW_WRITE_KD:
674 case DASD_ECKD_CCW_WRITE_KD_MT:
675 data->auxiliary.last_bytes_used = 0x1;
676 data->length = reclen;
677 data->operation.operation = 0x01;
678 break;
679 case DASD_ECKD_CCW_WRITE_CKD:
680 case DASD_ECKD_CCW_WRITE_CKD_MT:
681 data->auxiliary.last_bytes_used = 0x1;
682 data->length = reclen;
683 data->operation.operation = 0x03;
684 break;
685 case DASD_ECKD_CCW_READ:
686 case DASD_ECKD_CCW_READ_MT:
687 case DASD_ECKD_CCW_READ_KD:
688 case DASD_ECKD_CCW_READ_KD_MT:
689 data->auxiliary.last_bytes_used = 0x1;
690 data->length = reclen;
691 data->operation.operation = 0x06;
692 break;
693 case DASD_ECKD_CCW_READ_CKD:
694 case DASD_ECKD_CCW_READ_CKD_MT:
695 data->auxiliary.last_bytes_used = 0x1;
696 data->length = reclen;
697 data->operation.operation = 0x16;
698 break;
699 case DASD_ECKD_CCW_READ_COUNT:
700 data->operation.operation = 0x06;
701 break;
702 case DASD_ECKD_CCW_ERASE:
703 data->length = reclen;
704 data->auxiliary.last_bytes_used = 0x1;
705 data->operation.operation = 0x0b;
706 break;
707 default:
fc19f381
SH		 708 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
709 "opcode 0x%x", cmd);
1da177e4 710 }
b44b0ab3
SW		 711 set_ch_t(&data->seek_addr,
712 trk / private->rdc_data.trk_per_cyl,
713 trk % private->rdc_data.trk_per_cyl);
714 data->search_arg.cyl = data->seek_addr.cyl;
715 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 716 data->search_arg.record = rec_on_trk;
717}
718
719/*
720 * Returns 1 if the block is one of the special blocks that needs
721 * to get read/written with the KD variant of the command.
722 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
723 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
724 * Luckily the KD variants differ only by one bit (0x08) from the
725 * normal variant. So don't wonder about code like:
726 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
727 * ccw->cmd_code |= 0x8;
728 */
729static inline int
730dasd_eckd_cdl_special(int blk_per_trk, int recid)
731{
732 if (recid < 3)
733 return 1;
734 if (recid < blk_per_trk)
735 return 0;
736 if (recid < 2 * blk_per_trk)
737 return 1;
738 return 0;
739}
740
741/*
742 * Returns the record size for the special blocks of the cdl format.
743 * Only returns something useful if dasd_eckd_cdl_special is true
744 * for the recid.
745 */
746static inline int
747dasd_eckd_cdl_reclen(int recid)
748{
749 if (recid < 3)
750 return sizes_trk0[recid];
751 return LABEL_SIZE;
752}
b206181d
SH		 753/* create unique id from private structure. */
754static void create_uid(struct dasd_eckd_private *private)
3d052595 755{
4abb08c2 756 int count;
b206181d 757 struct dasd_uid *uid;
3d052595 758
2dedf0d9 759 uid = &private->uid;
3d052595 760 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 761 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 762 sizeof(uid->vendor) - 1);
3d052595 763 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 764 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 765 sizeof(uid->serial) - 1);
3d052595 766 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 767 uid->ssid = private->gneq->subsystemID;
a419aef8 768 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 769 if (private->sneq) {
770 uid->type = private->sneq->sua_flags;
8e09f215 771 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 772 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 773 } else {
774 uid->type = UA_BASE_DEVICE;
775 }
4abb08c2
SW		 776 if (private->vdsneq) {
777 for (count = 0; count < 16; count++) {
778 sprintf(uid->vduit+2*count, "%02x",
779 private->vdsneq->uit[count]);
780 }
781 }
b206181d
SH		 782}
783
784/*
785 * Generate device unique id that specifies the physical device.
786 */
787static int dasd_eckd_generate_uid(struct dasd_device *device)
788{
789 struct dasd_eckd_private *private;
790 unsigned long flags;
791
792 private = (struct dasd_eckd_private *) device->private;
793 if (!private)
794 return -ENODEV;
795 if (!private->ned || !private->gneq)
796 return -ENODEV;
797 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
798 create_uid(private);
2dedf0d9 799 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 800 return 0;
801}
802
2dedf0d9
SH		 803static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
804{
805 struct dasd_eckd_private *private;
806 unsigned long flags;
807
808 if (device->private) {
809 private = (struct dasd_eckd_private *)device->private;
810 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
811 *uid = private->uid;
812 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
813 return 0;
814 }
815 return -EINVAL;
816}
817
b206181d
SH		 818/*
819 * compare device UID with data of a given dasd_eckd_private structure
820 * return 0 for match
821 */
822static int dasd_eckd_compare_path_uid(struct dasd_device *device,
823 struct dasd_eckd_private *private)
824{
825 struct dasd_uid device_uid;
826
827 create_uid(private);
828 dasd_eckd_get_uid(device, &device_uid);
829
830 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
831}
832
a4d26c6a
SW		 833static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
834 struct dasd_ccw_req *cqr,
835 __u8 *rcd_buffer,
836 __u8 lpm)
17283b56 837{
17283b56 838 struct ccw1 *ccw;
a4d26c6a
SW		 839 /*
840 * buffer has to start with EBCDIC "V1.0" to show
841 * support for virtual device SNEQ
842 */
843 rcd_buffer[0] = 0xE5;
844 rcd_buffer[1] = 0xF1;
845 rcd_buffer[2] = 0x4B;
846 rcd_buffer[3] = 0xF0;
17283b56
CH		 847
848 ccw = cqr->cpaddr;
a4d26c6a
SW		 849 ccw->cmd_code = DASD_ECKD_CCW_RCD;
850 ccw->flags = 0;
17283b56 851 ccw->cda = (__u32)(addr_t)rcd_buffer;
a4d26c6a
SW		 852 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
853 cqr->magic = DASD_ECKD_MAGIC;
17283b56 854
8e09f215
SW		 855 cqr->startdev = device;
856 cqr->memdev = device;
857 cqr->block = NULL;
17283b56
CH		 858 cqr->expires = 10*HZ;
859 cqr->lpm = lpm;
eb6e199b 860 cqr->retries = 256;
17283b56
CH		 861 cqr->buildclk = get_clock();
862 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 863 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
864}
865
5915a873
SH		 866/*
867 * Wakeup helper for read_conf
868 * if the cqr is not done and needs some error recovery
869 * the buffer has to be re-initialized with the EBCDIC "V1.0"
870 * to show support for virtual device SNEQ
871 */
872static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
873{
874 struct ccw1 *ccw;
875 __u8 *rcd_buffer;
876
877 if (cqr->status != DASD_CQR_DONE) {
878 ccw = cqr->cpaddr;
879 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
880 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
881
882 rcd_buffer[0] = 0xE5;
883 rcd_buffer[1] = 0xF1;
884 rcd_buffer[2] = 0x4B;
885 rcd_buffer[3] = 0xF0;
886 }
887 dasd_wakeup_cb(cqr, data);
888}
889
a4d26c6a
SW		 890static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
891 struct dasd_ccw_req *cqr,
892 __u8 *rcd_buffer,
893 __u8 lpm)
894{
895 struct ciw *ciw;
896 int rc;
897 /*
898 * sanity check: scan for RCD command in extended SenseID data
899 * some devices do not support RCD
900 */
901 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
902 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
903 return -EOPNOTSUPP;
904
905 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
906 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 907 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 908 cqr->retries = 5;
5915a873 909 cqr->callback = read_conf_cb;
a4d26c6a
SW		 910 rc = dasd_sleep_on_immediatly(cqr);
911 return rc;
17283b56
CH		 912}
913
914static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
915 void **rcd_buffer,
916 int *rcd_buffer_size, __u8 lpm)
917{
918 struct ciw *ciw;
919 char *rcd_buf = NULL;
920 int ret;
921 struct dasd_ccw_req *cqr;
922
923 /*
a4d26c6a
SW		 924 * sanity check: scan for RCD command in extended SenseID data
925 * some devices do not support RCD
17283b56
CH		 926 */
927 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 928 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 929 ret = -EOPNOTSUPP;
930 goto out_error;
931 }
a4d26c6a 932 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 933 if (!rcd_buf) {
934 ret = -ENOMEM;
935 goto out_error;
936 }
a4d26c6a
SW		 937 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
938 0, /* use rcd_buf as data ara */
939 device);
17283b56 940 if (IS_ERR(cqr)) {
a4d26c6a
SW		 941 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
942 "Could not allocate RCD request");
943 ret = -ENOMEM;
17283b56
CH		 944 goto out_error;
945 }
a4d26c6a 946 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 947 cqr->callback = read_conf_cb;
17283b56
CH		 948 ret = dasd_sleep_on(cqr);
949 /*
950 * on success we update the user input parms
951 */
8e09f215 952 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 953 if (ret)
954 goto out_error;
955
a4d26c6a 956 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 957 *rcd_buffer = rcd_buf;
958 return 0;
959out_error:
960 kfree(rcd_buf);
961 *rcd_buffer = NULL;
962 *rcd_buffer_size = 0;
963 return ret;
964}
965
4abb08c2
SW		 966static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
967{
968
969 struct dasd_sneq *sneq;
970 int i, count;
971
972 private->ned = NULL;
973 private->sneq = NULL;
974 private->vdsneq = NULL;
975 private->gneq = NULL;
976 count = private->conf_len / sizeof(struct dasd_sneq);
977 sneq = (struct dasd_sneq *)private->conf_data;
978 for (i = 0; i < count; ++i) {
979 if (sneq->flags.identifier == 1 && sneq->format == 1)
980 private->sneq = sneq;
981 else if (sneq->flags.identifier == 1 && sneq->format == 4)
982 private->vdsneq = (struct vd_sneq *)sneq;
983 else if (sneq->flags.identifier == 2)
984 private->gneq = (struct dasd_gneq *)sneq;
985 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
986 private->ned = (struct dasd_ned *)sneq;
987 sneq++;
988 }
989 if (!private->ned || !private->gneq) {
990 private->ned = NULL;
991 private->sneq = NULL;
992 private->vdsneq = NULL;
993 private->gneq = NULL;
994 return -EINVAL;
995 }
996 return 0;
997
998};
999
1000static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
1001{
1002 struct dasd_gneq *gneq;
1003 int i, count, found;
1004
1005 count = conf_len / sizeof(*gneq);
1006 gneq = (struct dasd_gneq *)conf_data;
1007 found = 0;
1008 for (i = 0; i < count; ++i) {
1009 if (gneq->flags.identifier == 2) {
1010 found = 1;
1011 break;
1012 }
1013 gneq++;
1014 }
1015 if (found)
1016 return ((char *)gneq)[18] & 0x07;
1017 else
1018 return 0;
1019}
1020
1021static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 1022{
1023 void *conf_data;
1024 int conf_len, conf_data_saved;
1025 int rc;
a4d26c6a 1026 __u8 lpm, opm;
b206181d 1027 struct dasd_eckd_private *private, path_private;
a4d26c6a 1028 struct dasd_path *path_data;
b206181d
SH		 1029 struct dasd_uid *uid;
1030 char print_path_uid[60], print_device_uid[60];
1da177e4
LT		 1031
1032 private = (struct dasd_eckd_private *) device->private;
a4d26c6a
SW		 1033 path_data = &device->path_data;
1034 opm = ccw_device_get_path_mask(device->cdev);
1da177e4 1035 conf_data_saved = 0;
1da177e4
LT		 1036 /* get configuration data per operational path */
1037 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1038 if (!(lpm & opm))
1039 continue;
1040 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1041 &conf_len, lpm);
1042 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1043 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1044 "Read configuration data returned "
1045 "error %d", rc);
1046 return rc;
1047 }
1048 if (conf_data == NULL) {
1049 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1050 "No configuration data "
1051 "retrieved");
1052 /* no further analysis possible */
1053 path_data->opm |= lpm;
1054 continue; /* no error */
1055 }
1056 /* save first valid configuration data */
1057 if (!conf_data_saved) {
1058 kfree(private->conf_data);
1059 private->conf_data = conf_data;
1060 private->conf_len = conf_len;
1061 if (dasd_eckd_identify_conf_parts(private)) {
1062 private->conf_data = NULL;
1063 private->conf_len = 0;
1064 kfree(conf_data);
1065 continue;
1da177e4 1066 }
b206181d
SH		 1067 /*
1068 * build device UID that other path data
1069 * can be compared to it
1070 */
1071 dasd_eckd_generate_uid(device);
1072 conf_data_saved++;
1073 } else {
1074 path_private.conf_data = conf_data;
1075 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1076 if (dasd_eckd_identify_conf_parts(
1077 &path_private)) {
1078 path_private.conf_data = NULL;
1079 path_private.conf_len = 0;
1080 kfree(conf_data);
1081 continue;
1da177e4 1082 }
b206181d
SH		 1083
1084 if (dasd_eckd_compare_path_uid(
1085 device, &path_private)) {
1086 uid = &path_private.uid;
1087 if (strlen(uid->vduit) > 0)
1088 snprintf(print_path_uid,
1089 sizeof(print_path_uid),
1090 "%s.%s.%04x.%02x.%s",
1091 uid->vendor, uid->serial,
1092 uid->ssid, uid->real_unit_addr,
1093 uid->vduit);
1094 else
1095 snprintf(print_path_uid,
1096 sizeof(print_path_uid),
1097 "%s.%s.%04x.%02x",
1098 uid->vendor, uid->serial,
1099 uid->ssid,
1100 uid->real_unit_addr);
1101 uid = &private->uid;
1102 if (strlen(uid->vduit) > 0)
1103 snprintf(print_device_uid,
1104 sizeof(print_device_uid),
1105 "%s.%s.%04x.%02x.%s",
1106 uid->vendor, uid->serial,
1107 uid->ssid, uid->real_unit_addr,
1108 uid->vduit);
1109 else
1110 snprintf(print_device_uid,
1111 sizeof(print_device_uid),
1112 "%s.%s.%04x.%02x",
1113 uid->vendor, uid->serial,
1114 uid->ssid,
1115 uid->real_unit_addr);
1116 dev_err(&device->cdev->dev,
1117 "Not all channel paths lead to "
1118 "the same device, path %02X leads to "
1119 "device %s instead of %s\n", lpm,
1120 print_path_uid, print_device_uid);
1121 return -EINVAL;
1da177e4 1122 }
b206181d
SH		 1123
1124 path_private.conf_data = NULL;
1125 path_private.conf_len = 0;
1126 }
1127 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1128 case 0x02:
1129 path_data->npm |= lpm;
1130 break;
1131 case 0x03:
1132 path_data->ppm |= lpm;
1133 break;
1da177e4 1134 }
b206181d
SH		 1135 path_data->opm |= lpm;
1136
1137 if (conf_data != private->conf_data)
1138 kfree(conf_data);
1da177e4 1139 }
b206181d 1140
1da177e4
LT		 1141 return 0;
1142}
1143
a4d26c6a
SW		 1144static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1145{
1146 struct dasd_eckd_private *private;
1147 int mdc;
1148 u32 fcx_max_data;
1149
1150 private = (struct dasd_eckd_private *) device->private;
1151 if (private->fcx_max_data) {
1152 mdc = ccw_device_get_mdc(device->cdev, lpm);
1153 if ((mdc < 0)) {
1154 dev_warn(&device->cdev->dev,
1155 "Detecting the maximum data size for zHPF "
1156 "requests failed (rc=%d) for a new path %x\n",
1157 mdc, lpm);
1158 return mdc;
1159 }
1160 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
1161 if (fcx_max_data < private->fcx_max_data) {
1162 dev_warn(&device->cdev->dev,
1163 "The maximum data size for zHPF requests %u "
1164 "on a new path %x is below the active maximum "
1165 "%u\n", fcx_max_data, lpm,
1166 private->fcx_max_data);
1167 return -EACCES;
1168 }
1169 }
1170 return 0;
1171}
1172
b206181d
SH		 1173static int rebuild_device_uid(struct dasd_device *device,
1174 struct path_verification_work_data *data)
1175{
1176 struct dasd_eckd_private *private;
1177 struct dasd_path *path_data;
1178 __u8 lpm, opm;
1179 int rc;
1180
1181 rc = -ENODEV;
1182 private = (struct dasd_eckd_private *) device->private;
1183 path_data = &device->path_data;
1184 opm = device->path_data.opm;
1185
1186 for (lpm = 0x80; lpm; lpm >>= 1) {
1187 if (!(lpm & opm))
1188 continue;
1189 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1190 memset(&data->cqr, 0, sizeof(data->cqr));
1191 data->cqr.cpaddr = &data->ccw;
1192 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1193 data->rcd_buffer,
1194 lpm);
1195
1196 if (rc) {
1197 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1198 continue;
1199 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1200 "Read configuration data "
1201 "returned error %d", rc);
1202 break;
1203 }
1204 memcpy(private->conf_data, data->rcd_buffer,
1205 DASD_ECKD_RCD_DATA_SIZE);
1206 if (dasd_eckd_identify_conf_parts(private)) {
1207 rc = -ENODEV;
1208 } else /* first valid path is enough */
1209 break;
1210 }
1211
1212 if (!rc)
1213 rc = dasd_eckd_generate_uid(device);
1214
1215 return rc;
1216}
1217
a4d26c6a
SW		 1218static void do_path_verification_work(struct work_struct *work)
1219{
1220 struct path_verification_work_data *data;
1221 struct dasd_device *device;
b206181d
SH		 1222 struct dasd_eckd_private path_private;
1223 struct dasd_uid *uid;
1224 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
a4d26c6a
SW		 1225 __u8 lpm, opm, npm, ppm, epm;
1226 unsigned long flags;
b206181d 1227 char print_uid[60];
a4d26c6a
SW		 1228 int rc;
1229
1230 data = container_of(work, struct path_verification_work_data, worker);
1231 device = data->device;
1232
c8d1c0ff
SH		 1233 /* delay path verification until device was resumed */
1234 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1235 schedule_work(work);
1236 return;
1237 }
1238
a4d26c6a
SW		 1239 opm = 0;
1240 npm = 0;
1241 ppm = 0;
1242 epm = 0;
1243 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1244 if (!(lpm & data->tbvpm))
1245 continue;
1246 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1247 memset(&data->cqr, 0, sizeof(data->cqr));
1248 data->cqr.cpaddr = &data->ccw;
1249 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1250 data->rcd_buffer,
1251 lpm);
1252 if (!rc) {
1253 switch (dasd_eckd_path_access(data->rcd_buffer,
1254 DASD_ECKD_RCD_DATA_SIZE)
1255 ) {
1256 case 0x02:
1257 npm |= lpm;
1258 break;
1259 case 0x03:
1260 ppm |= lpm;
1261 break;
1262 }
1263 opm |= lpm;
1264 } else if (rc == -EOPNOTSUPP) {
1265 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1266 "path verification: No configuration "
1267 "data retrieved");
1268 opm |= lpm;
1269 } else if (rc == -EAGAIN) {
1270 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1271 "path verification: device is stopped,"
1272 " try again later");
b206181d
SH		 1273 epm |= lpm;
1274 } else {
1275 dev_warn(&device->cdev->dev,
1276 "Reading device feature codes failed "
1277 "(rc=%d) for new path %x\n", rc, lpm);
1278 continue;
1279 }
1280 if (verify_fcx_max_data(device, lpm)) {
1281 opm &= ~lpm;
1282 npm &= ~lpm;
1283 ppm &= ~lpm;
1284 continue;
1285 }
1286
1287 /*
1288 * save conf_data for comparison after
1289 * rebuild_device_uid may have changed
1290 * the original data
1291 */
1292 memcpy(&path_rcd_buf, data->rcd_buffer,
1293 DASD_ECKD_RCD_DATA_SIZE);
1294 path_private.conf_data = (void *) &path_rcd_buf;
1295 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1296 if (dasd_eckd_identify_conf_parts(&path_private)) {
1297 path_private.conf_data = NULL;
1298 path_private.conf_len = 0;
1299 continue;
1300 }
1301
1302 /*
1303 * compare path UID with device UID only if at least
1304 * one valid path is left
1305 * in other case the device UID may have changed and
1306 * the first working path UID will be used as device UID
1307 */
1308 if (device->path_data.opm &&
1309 dasd_eckd_compare_path_uid(device, &path_private)) {
1310 /*
1311 * the comparison was not successful
1312 * rebuild the device UID with at least one
1313 * known path in case a z/VM hyperswap command
1314 * has changed the device
1315 *
1316 * after this compare again
1317 *
1318 * if either the rebuild or the recompare fails
1319 * the path can not be used
1320 */
1321 if (rebuild_device_uid(device, data) ||
1322 dasd_eckd_compare_path_uid(
1323 device, &path_private)) {
1324 uid = &path_private.uid;
1325 if (strlen(uid->vduit) > 0)
1326 snprintf(print_uid, sizeof(print_uid),
1327 "%s.%s.%04x.%02x.%s",
1328 uid->vendor, uid->serial,
1329 uid->ssid, uid->real_unit_addr,
1330 uid->vduit);
1331 else
1332 snprintf(print_uid, sizeof(print_uid),
1333 "%s.%s.%04x.%02x",
1334 uid->vendor, uid->serial,
1335 uid->ssid,
1336 uid->real_unit_addr);
1337 dev_err(&device->cdev->dev,
1338 "The newly added channel path %02X "
1339 "will not be used because it leads "
1340 "to a different device %s\n",
1341 lpm, print_uid);
a4d26c6a
SW		 1342 opm &= ~lpm;
1343 npm &= ~lpm;
1344 ppm &= ~lpm;
b206181d 1345 continue;
a4d26c6a
SW		 1346 }
1347 }
b206181d
SH		 1348
1349 /*
1350 * There is a small chance that a path is lost again between
1351 * above path verification and the following modification of
1352 * the device opm mask. We could avoid that race here by using
1353 * yet another path mask, but we rather deal with this unlikely
1354 * situation in dasd_start_IO.
1355 */
1356 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1357 if (!device->path_data.opm && opm) {
1358 device->path_data.opm = opm;
1359 dasd_generic_path_operational(device);
1360 } else
1361 device->path_data.opm |= opm;
1362 device->path_data.npm |= npm;
1363 device->path_data.ppm |= ppm;
1364 device->path_data.tbvpm |= epm;
1365 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1366 }
a4d26c6a
SW		 1367
1368 dasd_put_device(device);
1369 if (data->isglobal)
1370 mutex_unlock(&dasd_path_verification_mutex);
1371 else
1372 kfree(data);
1373}
1374
1375static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1376{
1377 struct path_verification_work_data *data;
1378
1379 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1380 if (!data) {
1381 if (mutex_trylock(&dasd_path_verification_mutex)) {
1382 data = path_verification_worker;
1383 data->isglobal = 1;
1384 } else
1385 return -ENOMEM;
1386 } else {
1387 memset(data, 0, sizeof(*data));
1388 data->isglobal = 0;
1389 }
1390 INIT_WORK(&data->worker, do_path_verification_work);
1391 dasd_get_device(device);
1392 data->device = device;
1393 data->tbvpm = lpm;
1394 schedule_work(&data->worker);
1395 return 0;
1396}
1397
8e09f215
SW		 1398static int dasd_eckd_read_features(struct dasd_device *device)
1399{
1400 struct dasd_psf_prssd_data *prssdp;
1401 struct dasd_rssd_features *features;
1402 struct dasd_ccw_req *cqr;
1403 struct ccw1 *ccw;
1404 int rc;
1405 struct dasd_eckd_private *private;
1406
1407 private = (struct dasd_eckd_private *) device->private;
68d1e5f0 1408 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1409 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1410 (sizeof(struct dasd_psf_prssd_data) +
1411 sizeof(struct dasd_rssd_features)),
1412 device);
1413 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1414 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1415 "allocate initialization request");
8e09f215
SW		 1416 return PTR_ERR(cqr);
1417 }
1418 cqr->startdev = device;
1419 cqr->memdev = device;
1420 cqr->block = NULL;
eb6e199b 1421 cqr->retries = 256;
8e09f215
SW		 1422 cqr->expires = 10 * HZ;
1423
1424 /* Prepare for Read Subsystem Data */
1425 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1426 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1427 prssdp->order = PSF_ORDER_PRSSD;
1428 prssdp->suborder = 0x41; /* Read Feature Codes */
1429 /* all other bytes of prssdp must be zero */
1430
1431 ccw = cqr->cpaddr;
1432 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1433 ccw->count = sizeof(struct dasd_psf_prssd_data);
1434 ccw->flags |= CCW_FLAG_CC;
1435 ccw->cda = (__u32)(addr_t) prssdp;
1436
1437 /* Read Subsystem Data - feature codes */
1438 features = (struct dasd_rssd_features *) (prssdp + 1);
1439 memset(features, 0, sizeof(struct dasd_rssd_features));
1440
1441 ccw++;
1442 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1443 ccw->count = sizeof(struct dasd_rssd_features);
1444 ccw->cda = (__u32)(addr_t) features;
1445
1446 cqr->buildclk = get_clock();
1447 cqr->status = DASD_CQR_FILLED;
1448 rc = dasd_sleep_on(cqr);
1449 if (rc == 0) {
1450 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1451 features = (struct dasd_rssd_features *) (prssdp + 1);
1452 memcpy(&private->features, features,
1453 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1454 } else
1455 dev_warn(&device->cdev->dev, "Reading device feature codes"
1456 " failed with rc=%d\n", rc);
8e09f215
SW		 1457 dasd_sfree_request(cqr, cqr->memdev);
1458 return rc;
1459}
1460
1461
40545573
HH		 1462/*
1463 * Build CP for Perform Subsystem Function - SSC.
1464 */
f3eb5384
SW		 1465static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1466 int enable_pav)
40545573 1467{
8e09f215
SW		 1468 struct dasd_ccw_req *cqr;
1469 struct dasd_psf_ssc_data *psf_ssc_data;
1470 struct ccw1 *ccw;
40545573 1471
68b781fe 1472 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1473 sizeof(struct dasd_psf_ssc_data),
1474 device);
1475
8e09f215 1476 if (IS_ERR(cqr)) {
fc19f381 1477 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1478 "Could not allocate PSF-SSC request");
8e09f215
SW		 1479 return cqr;
1480 }
1481 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1482 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1483 psf_ssc_data->suborder = 0xc0;
f3eb5384 1484 if (enable_pav) {
626350b6 1485 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1486 psf_ssc_data->reserved[0] = 0x88;
1487 }
8e09f215
SW		 1488 ccw = cqr->cpaddr;
1489 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1490 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1491 ccw->count = 66;
1492
1493 cqr->startdev = device;
1494 cqr->memdev = device;
1495 cqr->block = NULL;
eb6e199b 1496 cqr->retries = 256;
8e09f215
SW		 1497 cqr->expires = 10*HZ;
1498 cqr->buildclk = get_clock();
1499 cqr->status = DASD_CQR_FILLED;
1500 return cqr;
40545573
HH		 1501}
1502
1503/*
1504 * Perform Subsystem Function.
1505 * It is necessary to trigger CIO for channel revalidation since this
1506 * call might change behaviour of DASD devices.
1507 */
1508static int
12d7b107
SH		 1509dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1510 unsigned long flags)
40545573 1511{
8e09f215
SW		 1512 struct dasd_ccw_req *cqr;
1513 int rc;
1514
f3eb5384 1515 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1516 if (IS_ERR(cqr))
1517 return PTR_ERR(cqr);
1518
12d7b107
SH		 1519 /*
1520 * set flags e.g. turn on failfast, to prevent blocking
1521 * the calling function should handle failed requests
1522 */
1523 cqr->flags |= flags;
1524
8e09f215
SW		 1525 rc = dasd_sleep_on(cqr);
1526 if (!rc)
1527 /* trigger CIO to reprobe devices */
1528 css_schedule_reprobe();
12d7b107
SH		 1529 else if (cqr->intrc == -EAGAIN)
1530 rc = -EAGAIN;
1531
8e09f215
SW		 1532 dasd_sfree_request(cqr, cqr->memdev);
1533 return rc;
40545573
HH		 1534}
1535
1536/*
1537 * Valide storage server of current device.
1538 */
12d7b107
SH		 1539static int dasd_eckd_validate_server(struct dasd_device *device,
1540 unsigned long flags)
40545573
HH		 1541{
1542 int rc;
8e09f215 1543 struct dasd_eckd_private *private;
f3eb5384 1544 int enable_pav;
40545573 1545
f9f8d02f
SH		 1546 private = (struct dasd_eckd_private *) device->private;
1547 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1548 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1549 return 0;
40545573 1550 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1551 enable_pav = 0;
1552 else
1553 enable_pav = 1;
12d7b107 1554 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1555
8e79a441
HH		 1556 /* may be requested feature is not available on server,
1557 * therefore just report error and go ahead */
b8ed5dd5
SH		 1558 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1559 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1560 return rc;
40545573
HH		 1561}
1562
f1633031
SH		 1563/*
1564 * worker to do a validate server in case of a lost pathgroup
1565 */
1566static void dasd_eckd_do_validate_server(struct work_struct *work)
1567{
1568 struct dasd_device *device = container_of(work, struct dasd_device,
1569 kick_validate);
12d7b107
SH		 1570 if (dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST)
1571 == -EAGAIN) {
1572 /* schedule worker again if failed */
1573 schedule_work(&device->kick_validate);
1574 return;
1575 }
1576
f1633031
SH		 1577 dasd_put_device(device);
1578}
1579
1580static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1581{
1582 dasd_get_device(device);
25e2cf1c
SH		 1583 /* exit if device not online or in offline processing */
1584 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1585 device->state < DASD_STATE_ONLINE) {
1586 dasd_put_device(device);
1587 return;
1588 }
f1633031
SH		 1589 /* queue call to do_validate_server to the kernel event daemon. */
1590 schedule_work(&device->kick_validate);
1591}
1592
ef19298b
SW		 1593static u32 get_fcx_max_data(struct dasd_device *device)
1594{
1595#if defined(CONFIG_64BIT)
1596 int tpm, mdc;
1597 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1598 struct dasd_eckd_private *private;
1599
1600 if (dasd_nofcx)
1601 return 0;
1602 /* is transport mode supported? */
1603 private = (struct dasd_eckd_private *) device->private;
1604 fcx_in_css = css_general_characteristics.fcx;
1605 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1606 fcx_in_features = private->features.feature[40] & 0x80;
1607 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1608
1609 if (!tpm)
1610 return 0;
1611
1612 mdc = ccw_device_get_mdc(device->cdev, 0);
1613 if (mdc < 0) {
1614 dev_warn(&device->cdev->dev, "Detecting the maximum supported"
1615 " data size for zHPF requests failed\n");
1616 return 0;
1617 } else
1618 return mdc * FCX_MAX_DATA_FACTOR;
1619#else
1620 return 0;
1621#endif
1622}
1623
3d052595
HH		 1624/*
1625 * Check device characteristics.
1626 * If the device is accessible using ECKD discipline, the device is enabled.
1627 */
1da177e4
LT		 1628static int
1629dasd_eckd_check_characteristics(struct dasd_device *device)
1630{
1631 struct dasd_eckd_private *private;
8e09f215 1632 struct dasd_block *block;
2dedf0d9 1633 struct dasd_uid temp_uid;
f9f8d02f 1634 int rc, i;
33b62a30 1635 int readonly;
7c8faa86 1636 unsigned long value;
1da177e4 1637
f1633031
SH		 1638 /* setup work queue for validate server*/
1639 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1640
454e1fa1
PO		 1641 if (!ccw_device_is_pathgroup(device->cdev)) {
1642 dev_warn(&device->cdev->dev,
1643 "A channel path group could not be established\n");
1644 return -EIO;
1645 }
1646 if (!ccw_device_is_multipath(device->cdev)) {
1647 dev_info(&device->cdev->dev,
1648 "The DASD is not operating in multipath mode\n");
1649 }
1da177e4 1650 private = (struct dasd_eckd_private *) device->private;
92636b15
SO		 1651 if (!private) {
1652 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1653 if (!private) {
fc19f381
SH		 1654 dev_warn(&device->cdev->dev,
1655 "Allocating memory for private DASD data "
1656 "failed\n");
1da177e4
LT		 1657 return -ENOMEM;
1658 }
1da177e4 1659 device->private = (void *) private;
92636b15
SO		 1660 } else {
1661 memset(private, 0, sizeof(*private));
1da177e4
LT		 1662 }
1663 /* Invalidate status of initial analysis. */
1664 private->init_cqr_status = -1;
1665 /* Set default cache operations. */
1666 private->attrib.operation = DASD_NORMAL_CACHE;
1667 private->attrib.nr_cyl = 0;
1668
40545573
HH		 1669 /* Read Configuration Data */
1670 rc = dasd_eckd_read_conf(device);
1671 if (rc)
8e09f215 1672 goto out_err1;
40545573 1673
7c8faa86
SH		 1674 /* set default timeout */
1675 device->default_expires = DASD_EXPIRES;
1676 if (private->gneq) {
1677 value = 1;
1678 for (i = 0; i < private->gneq->timeout.value; i++)
1679 value = 10 * value;
1680 value = value * private->gneq->timeout.number;
1681 /* do not accept useless values */
1682 if (value != 0 && value <= DASD_EXPIRES_MAX)
1683 device->default_expires = value;
1684 }
1685
2dedf0d9
SH		 1686 dasd_eckd_get_uid(device, &temp_uid);
1687 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1688 block = dasd_alloc_block();
1689 if (IS_ERR(block)) {
b8ed5dd5
SH		 1690 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1691 "could not allocate dasd "
1692 "block structure");
8e09f215
SW		 1693 rc = PTR_ERR(block);
1694 goto out_err1;
1695 }
1696 device->block = block;
1697 block->base = device;
1698 }
1699
f9f8d02f
SH		 1700 /* register lcu with alias handling, enable PAV */
1701 rc = dasd_alias_make_device_known_to_lcu(device);
1702 if (rc)
8e09f215 1703 goto out_err2;
f9f8d02f 1704
12d7b107 1705 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 1706
1707 /* device may report different configuration data after LCU setup */
1708 rc = dasd_eckd_read_conf(device);
1709 if (rc)
1710 goto out_err3;
8e09f215
SW		 1711
1712 /* Read Feature Codes */
68d1e5f0 1713 dasd_eckd_read_features(device);
40545573 1714
1da177e4 1715 /* Read Device Characteristics */
68b781fe
SH		 1716 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1717 &private->rdc_data, 64);
8e09f215 1718 if (rc) {
b8ed5dd5
SH		 1719 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1720 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1721 goto out_err3;
1722 }
34cd551a
SH		 1723
1724 if ((device->features & DASD_FEATURE_USERAW) &&
1725 !(private->rdc_data.facilities.RT_in_LR)) {
1726 dev_err(&device->cdev->dev, "The storage server does not "
1727 "support raw-track access\n");
1728 rc = -EINVAL;
1729 goto out_err3;
1730 }
1731
817f2c84 1732 /* find the valid cylinder size */
b44b0ab3
SW		 1733 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1734 private->rdc_data.long_no_cyl)
1735 private->real_cyl = private->rdc_data.long_no_cyl;
1736 else
1737 private->real_cyl = private->rdc_data.no_cyl;
1738
ef19298b
SW		 1739 private->fcx_max_data = get_fcx_max_data(device);
1740
33b62a30
SW		 1741 readonly = dasd_device_is_ro(device);
1742 if (readonly)
1743 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1744
fc19f381 1745 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1746 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1747 private->rdc_data.dev_type,
1748 private->rdc_data.dev_model,
1749 private->rdc_data.cu_type,
1750 private->rdc_data.cu_model.model,
92636b15 1751 private->real_cyl,
fc19f381 1752 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1753 private->rdc_data.sec_per_trk,
1754 readonly ? ", read-only device" : "");
8e09f215
SW		 1755 return 0;
1756
1757out_err3:
1758 dasd_alias_disconnect_device_from_lcu(device);
1759out_err2:
1760 dasd_free_block(device->block);
1761 device->block = NULL;
1762out_err1:
4abb08c2 1763 kfree(private->conf_data);
8e09f215
SW		 1764 kfree(device->private);
1765 device->private = NULL;
3d052595 1766 return rc;
1da177e4
LT		 1767}
1768
8e09f215
SW		 1769static void dasd_eckd_uncheck_device(struct dasd_device *device)
1770{
4abb08c2
SW		 1771 struct dasd_eckd_private *private;
1772
1773 private = (struct dasd_eckd_private *) device->private;
8e09f215 1774 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1775 private->ned = NULL;
1776 private->sneq = NULL;
1777 private->vdsneq = NULL;
1778 private->gneq = NULL;
1779 private->conf_len = 0;
1780 kfree(private->conf_data);
1781 private->conf_data = NULL;
8e09f215
SW		 1782}
1783
1da177e4
LT		 1784static struct dasd_ccw_req *
1785dasd_eckd_analysis_ccw(struct dasd_device *device)
1786{
1787 struct dasd_eckd_private *private;
1788 struct eckd_count *count_data;
1789 struct LO_eckd_data *LO_data;
1790 struct dasd_ccw_req *cqr;
1791 struct ccw1 *ccw;
1792 int cplength, datasize;
1793 int i;
1794
1795 private = (struct dasd_eckd_private *) device->private;
1796
1797 cplength = 8;
1798 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1799 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1800 if (IS_ERR(cqr))
1801 return cqr;
1802 ccw = cqr->cpaddr;
1803 /* Define extent for the first 3 tracks. */
1804 define_extent(ccw++, cqr->data, 0, 2,
1805 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1806 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1807 /* Locate record for the first 4 records on track 0. */
1808 ccw[-1].flags |= CCW_FLAG_CC;
1809 locate_record(ccw++, LO_data++, 0, 0, 4,
1810 DASD_ECKD_CCW_READ_COUNT, device, 0);
1811
1812 count_data = private->count_area;
1813 for (i = 0; i < 4; i++) {
1814 ccw[-1].flags |= CCW_FLAG_CC;
1815 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1816 ccw->flags = 0;
1817 ccw->count = 8;
1818 ccw->cda = (__u32)(addr_t) count_data;
1819 ccw++;
1820 count_data++;
1821 }
1822
1823 /* Locate record for the first record on track 2. */
1824 ccw[-1].flags |= CCW_FLAG_CC;
1825 locate_record(ccw++, LO_data++, 2, 0, 1,
1826 DASD_ECKD_CCW_READ_COUNT, device, 0);
1827 /* Read count ccw. */
1828 ccw[-1].flags |= CCW_FLAG_CC;
1829 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1830 ccw->flags = 0;
1831 ccw->count = 8;
1832 ccw->cda = (__u32)(addr_t) count_data;
1833
8e09f215
SW		 1834 cqr->block = NULL;
1835 cqr->startdev = device;
1836 cqr->memdev = device;
eb6e199b 1837 cqr->retries = 255;
1da177e4
LT		 1838 cqr->buildclk = get_clock();
1839 cqr->status = DASD_CQR_FILLED;
1840 return cqr;
1841}
1842
eb6e199b
SW		 1843/* differentiate between 'no record found' and any other error */
1844static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1845{
1846 char *sense;
1847 if (init_cqr->status == DASD_CQR_DONE)
1848 return INIT_CQR_OK;
1849 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1850 init_cqr->status == DASD_CQR_FAILED) {
1851 sense = dasd_get_sense(&init_cqr->irb);
1852 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1853 return INIT_CQR_UNFORMATTED;
1854 else
1855 return INIT_CQR_ERROR;
1856 } else
1857 return INIT_CQR_ERROR;
1858}
1859
1da177e4
LT		 1860/*
1861 * This is the callback function for the init_analysis cqr. It saves
1862 * the status of the initial analysis ccw before it frees it and kicks
1863 * the device to continue the startup sequence. This will call
1864 * dasd_eckd_do_analysis again (if the devices has not been marked
1865 * for deletion in the meantime).
1866 */
eb6e199b
SW		 1867static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1868 void *data)
1da177e4
LT		 1869{
1870 struct dasd_eckd_private *private;
1871 struct dasd_device *device;
1872
8e09f215 1873 device = init_cqr->startdev;
1da177e4 1874 private = (struct dasd_eckd_private *) device->private;
eb6e199b 1875 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1876 dasd_sfree_request(init_cqr, device);
1877 dasd_kick_device(device);
1878}
1879
eb6e199b 1880static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 1881{
1da177e4
LT		 1882 struct dasd_ccw_req *init_cqr;
1883
8e09f215 1884 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1885 if (IS_ERR(init_cqr))
1886 return PTR_ERR(init_cqr);
1887 init_cqr->callback = dasd_eckd_analysis_callback;
1888 init_cqr->callback_data = NULL;
1889 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1890 /* first try without ERP, so we can later handle unformatted
1891 * devices as special case
1892 */
1893 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1894 init_cqr->retries = 0;
1da177e4
LT		 1895 dasd_add_request_head(init_cqr);
1896 return -EAGAIN;
1897}
1898
eb6e199b 1899static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1900{
8e09f215 1901 struct dasd_device *device;
1da177e4
LT		 1902 struct dasd_eckd_private *private;
1903 struct eckd_count *count_area;
1904 unsigned int sb, blk_per_trk;
1905 int status, i;
eb6e199b 1906 struct dasd_ccw_req *init_cqr;
1da177e4 1907
8e09f215 1908 device = block->base;
1da177e4
LT		 1909 private = (struct dasd_eckd_private *) device->private;
1910 status = private->init_cqr_status;
1911 private->init_cqr_status = -1;
eb6e199b
SW		 1912 if (status == INIT_CQR_ERROR) {
1913 /* try again, this time with full ERP */
1914 init_cqr = dasd_eckd_analysis_ccw(device);
1915 dasd_sleep_on(init_cqr);
1916 status = dasd_eckd_analysis_evaluation(init_cqr);
1917 dasd_sfree_request(init_cqr, device);
1918 }
1919
e4dbb0f2
SH		 1920 if (device->features & DASD_FEATURE_USERAW) {
1921 block->bp_block = DASD_RAW_BLOCKSIZE;
1922 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1923 block->s2b_shift = 3;
1924 goto raw;
1925 }
1926
eb6e199b
SW		 1927 if (status == INIT_CQR_UNFORMATTED) {
1928 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1929 return -EMEDIUMTYPE;
eb6e199b
SW		 1930 } else if (status == INIT_CQR_ERROR) {
1931 dev_err(&device->cdev->dev,
1932 "Detecting the DASD disk layout failed because "
1933 "of an I/O error\n");
1934 return -EIO;
1da177e4
LT		 1935 }
1936
1937 private->uses_cdl = 1;
1da177e4
LT		 1938 /* Check Track 0 for Compatible Disk Layout */
1939 count_area = NULL;
1940 for (i = 0; i < 3; i++) {
1941 if (private->count_area[i].kl != 4 ||
1942 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1943 private->uses_cdl = 0;
1944 break;
1945 }
1946 }
1947 if (i == 3)
1948 count_area = &private->count_area[4];
1949
1950 if (private->uses_cdl == 0) {
1951 for (i = 0; i < 5; i++) {
1952 if ((private->count_area[i].kl != 0) ||
1953 (private->count_area[i].dl !=
1954 private->count_area[0].dl))
1955 break;
1956 }
1957 if (i == 5)
1958 count_area = &private->count_area[0];
1959 } else {
1960 if (private->count_area[3].record == 1)
fc19f381
SH		 1961 dev_warn(&device->cdev->dev,
1962 "Track 0 has no records following the VTOC\n");
1da177e4 1963 }
e4dbb0f2 1964
1da177e4
LT		 1965 if (count_area != NULL && count_area->kl == 0) {
1966 /* we found notthing violating our disk layout */
1967 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1968 block->bp_block = count_area->dl;
1da177e4 1969 }
8e09f215 1970 if (block->bp_block == 0) {
fc19f381
SH		 1971 dev_warn(&device->cdev->dev,
1972 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1973 return -EMEDIUMTYPE;
1974 }
8e09f215
SW		 1975 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1976 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1977 block->s2b_shift++;
1da177e4 1978
8e09f215 1979 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 1980
1981raw:
b44b0ab3 1982 block->blocks = (private->real_cyl *
1da177e4
LT		 1983 private->rdc_data.trk_per_cyl *
1984 blk_per_trk);
1985
fc19f381
SH		 1986 dev_info(&device->cdev->dev,
1987 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1988 "%s\n", (block->bp_block >> 10),
1989 ((private->real_cyl *
1990 private->rdc_data.trk_per_cyl *
1991 blk_per_trk * (block->bp_block >> 9)) >> 1),
1992 ((blk_per_trk * block->bp_block) >> 10),
1993 private->uses_cdl ?
1994 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 1995
1996 return 0;
1997}
1998
8e09f215 1999static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 2000{
2001 struct dasd_eckd_private *private;
2002
8e09f215 2003 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 2004 if (private->init_cqr_status < 0)
8e09f215 2005 return dasd_eckd_start_analysis(block);
1da177e4 2006 else
8e09f215 2007 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2008}
2009
8e09f215
SW		 2010static int dasd_eckd_ready_to_online(struct dasd_device *device)
2011{
2012 return dasd_alias_add_device(device);
2013};
2014
2015static int dasd_eckd_online_to_ready(struct dasd_device *device)
2016{
501183f2 2017 cancel_work_sync(&device->reload_device);
25e2cf1c 2018 cancel_work_sync(&device->kick_validate);
8e09f215
SW		 2019 return dasd_alias_remove_device(device);
2020};
2021
1da177e4 2022static int
8e09f215 2023dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 2024{
2025 struct dasd_eckd_private *private;
2026
8e09f215
SW		 2027 private = (struct dasd_eckd_private *) block->base->private;
2028 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2029 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2030 0, block->bp_block);
1da177e4
LT		 2031 }
2032 geo->cylinders = private->rdc_data.no_cyl;
2033 geo->heads = private->rdc_data.trk_per_cyl;
2034 return 0;
2035}
2036
2037static struct dasd_ccw_req *
2038dasd_eckd_format_device(struct dasd_device * device,
2039 struct format_data_t * fdata)
2040{
2041 struct dasd_eckd_private *private;
2042 struct dasd_ccw_req *fcp;
2043 struct eckd_count *ect;
2044 struct ccw1 *ccw;
2045 void *data;
b44b0ab3
SW		 2046 int rpt;
2047 struct ch_t address;
1da177e4
LT		 2048 int cplength, datasize;
2049 int i;
f9a28f7b
JBJ		 2050 int intensity = 0;
2051 int r0_perm;
1da177e4
LT		 2052
2053 private = (struct dasd_eckd_private *) device->private;
2054 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
b44b0ab3
SW		 2055 set_ch_t(&address,
2056 fdata->start_unit / private->rdc_data.trk_per_cyl,
2057 fdata->start_unit % private->rdc_data.trk_per_cyl);
1da177e4
LT		 2058
2059 /* Sanity checks. */
2060 if (fdata->start_unit >=
b44b0ab3 2061 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
fc19f381
SH		 2062 dev_warn(&device->cdev->dev, "Start track number %d used in "
2063 "formatting is too big\n", fdata->start_unit);
1da177e4
LT		 2064 return ERR_PTR(-EINVAL);
2065 }
2066 if (fdata->start_unit > fdata->stop_unit) {
fc19f381
SH		 2067 dev_warn(&device->cdev->dev, "Start track %d used in "
2068 "formatting exceeds end track\n", fdata->start_unit);
1da177e4
LT		 2069 return ERR_PTR(-EINVAL);
2070 }
2071 if (dasd_check_blocksize(fdata->blksize) != 0) {
fc19f381
SH		 2072 dev_warn(&device->cdev->dev,
2073 "The DASD cannot be formatted with block size %d\n",
2074 fdata->blksize);
1da177e4
LT		 2075 return ERR_PTR(-EINVAL);
2076 }
2077
2078 /*
2079 * fdata->intensity is a bit string that tells us what to do:
2080 * Bit 0: write record zero
2081 * Bit 1: write home address, currently not supported
2082 * Bit 2: invalidate tracks
2083 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2084 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2085 * Only some bit combinations do make sense.
2086 */
f9a28f7b
JBJ		 2087 if (fdata->intensity & 0x10) {
2088 r0_perm = 0;
2089 intensity = fdata->intensity & ~0x10;
2090 } else {
2091 r0_perm = 1;
2092 intensity = fdata->intensity;
2093 }
2094 switch (intensity) {
1da177e4
LT		 2095 case 0x00: /* Normal format */
2096 case 0x08: /* Normal format, use cdl. */
2097 cplength = 2 + rpt;
2098 datasize = sizeof(struct DE_eckd_data) +
2099 sizeof(struct LO_eckd_data) +
2100 rpt * sizeof(struct eckd_count);
2101 break;
2102 case 0x01: /* Write record zero and format track. */
2103 case 0x09: /* Write record zero and format track, use cdl. */
2104 cplength = 3 + rpt;
2105 datasize = sizeof(struct DE_eckd_data) +
2106 sizeof(struct LO_eckd_data) +
2107 sizeof(struct eckd_count) +
2108 rpt * sizeof(struct eckd_count);
2109 break;
2110 case 0x04: /* Invalidate track. */
2111 case 0x0c: /* Invalidate track, use cdl. */
2112 cplength = 3;
2113 datasize = sizeof(struct DE_eckd_data) +
2114 sizeof(struct LO_eckd_data) +
2115 sizeof(struct eckd_count);
2116 break;
2117 default:
fc19f381
SH		 2118 dev_warn(&device->cdev->dev, "An I/O control call used "
2119 "incorrect flags 0x%x\n", fdata->intensity);
1da177e4
LT		 2120 return ERR_PTR(-EINVAL);
2121 }
2122 /* Allocate the format ccw request. */
68b781fe 2123 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 2124 if (IS_ERR(fcp))
2125 return fcp;
2126
2127 data = fcp->data;
2128 ccw = fcp->cpaddr;
2129
f9a28f7b 2130 switch (intensity & ~0x08) {
1da177e4
LT		 2131 case 0x00: /* Normal format. */
2132 define_extent(ccw++, (struct DE_eckd_data *) data,
2133 fdata->start_unit, fdata->start_unit,
2134 DASD_ECKD_CCW_WRITE_CKD, device);
f9a28f7b
JBJ		 2135 /* grant subsystem permission to format R0 */
2136 if (r0_perm)
2137 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1da177e4
LT		 2138 data += sizeof(struct DE_eckd_data);
2139 ccw[-1].flags |= CCW_FLAG_CC;
2140 locate_record(ccw++, (struct LO_eckd_data *) data,
2141 fdata->start_unit, 0, rpt,
2142 DASD_ECKD_CCW_WRITE_CKD, device,
2143 fdata->blksize);
2144 data += sizeof(struct LO_eckd_data);
2145 break;
2146 case 0x01: /* Write record zero + format track. */
2147 define_extent(ccw++, (struct DE_eckd_data *) data,
2148 fdata->start_unit, fdata->start_unit,
2149 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2150 device);
2151 data += sizeof(struct DE_eckd_data);
2152 ccw[-1].flags |= CCW_FLAG_CC;
2153 locate_record(ccw++, (struct LO_eckd_data *) data,
2154 fdata->start_unit, 0, rpt + 1,
2155 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
8e09f215 2156 device->block->bp_block);
1da177e4
LT		 2157 data += sizeof(struct LO_eckd_data);
2158 break;
2159 case 0x04: /* Invalidate track. */
2160 define_extent(ccw++, (struct DE_eckd_data *) data,
2161 fdata->start_unit, fdata->start_unit,
2162 DASD_ECKD_CCW_WRITE_CKD, device);
2163 data += sizeof(struct DE_eckd_data);
2164 ccw[-1].flags |= CCW_FLAG_CC;
2165 locate_record(ccw++, (struct LO_eckd_data *) data,
2166 fdata->start_unit, 0, 1,
2167 DASD_ECKD_CCW_WRITE_CKD, device, 8);
2168 data += sizeof(struct LO_eckd_data);
2169 break;
2170 }
f9a28f7b 2171 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2172 ect = (struct eckd_count *) data;
2173 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2174 ect->cyl = address.cyl;
2175 ect->head = address.head;
1da177e4
LT		 2176 ect->record = 0;
2177 ect->kl = 0;
2178 ect->dl = 8;
2179 ccw[-1].flags |= CCW_FLAG_CC;
2180 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2181 ccw->flags = CCW_FLAG_SLI;
2182 ccw->count = 8;
2183 ccw->cda = (__u32)(addr_t) ect;
2184 ccw++;
2185 }
f9a28f7b 2186 if ((intensity & ~0x08) & 0x04) { /* erase track */
1da177e4
LT		 2187 ect = (struct eckd_count *) data;
2188 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2189 ect->cyl = address.cyl;
2190 ect->head = address.head;
1da177e4
LT		 2191 ect->record = 1;
2192 ect->kl = 0;
2193 ect->dl = 0;
2194 ccw[-1].flags |= CCW_FLAG_CC;
2195 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2196 ccw->flags = CCW_FLAG_SLI;
2197 ccw->count = 8;
2198 ccw->cda = (__u32)(addr_t) ect;
2199 } else { /* write remaining records */
2200 for (i = 0; i < rpt; i++) {
2201 ect = (struct eckd_count *) data;
2202 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2203 ect->cyl = address.cyl;
2204 ect->head = address.head;
1da177e4
LT		 2205 ect->record = i + 1;
2206 ect->kl = 0;
2207 ect->dl = fdata->blksize;
2208 /* Check for special tracks 0-1 when formatting CDL */
f9a28f7b 2209 if ((intensity & 0x08) &&
1da177e4
LT		 2210 fdata->start_unit == 0) {
2211 if (i < 3) {
2212 ect->kl = 4;
2213 ect->dl = sizes_trk0[i] - 4;
138c014d 2214 }
1da177e4 2215 }
f9a28f7b 2216 if ((intensity & 0x08) &&
1da177e4
LT		 2217 fdata->start_unit == 1) {
2218 ect->kl = 44;
2219 ect->dl = LABEL_SIZE - 44;
2220 }
2221 ccw[-1].flags |= CCW_FLAG_CC;
2222 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2223 ccw->flags = CCW_FLAG_SLI;
2224 ccw->count = 8;
2225 ccw->cda = (__u32)(addr_t) ect;
2226 ccw++;
2227 }
2228 }
8e09f215
SW		 2229 fcp->startdev = device;
2230 fcp->memdev = device;
eb6e199b 2231 fcp->retries = 256;
1da177e4
LT		 2232 fcp->buildclk = get_clock();
2233 fcp->status = DASD_CQR_FILLED;
2234 return fcp;
2235}
2236
8e09f215 2237static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 2238{
8e09f215
SW		 2239 cqr->status = DASD_CQR_FILLED;
2240 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2241 dasd_eckd_reset_ccw_to_base_io(cqr);
2242 cqr->startdev = cqr->block->base;
a4d26c6a 2243 cqr->lpm = cqr->block->base->path_data.opm;
1da177e4 2244 }
8e09f215 2245};
1da177e4
LT		 2246
2247static dasd_erp_fn_t
2248dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2249{
8e09f215 2250 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 2251 struct ccw_device *cdev = device->cdev;
2252
2253 switch (cdev->id.cu_type) {
2254 case 0x3990:
2255 case 0x2105:
2256 case 0x2107:
2257 case 0x1750:
2258 return dasd_3990_erp_action;
2259 case 0x9343:
2260 case 0x3880:
2261 default:
2262 return dasd_default_erp_action;
2263 }
2264}
2265
2266static dasd_erp_fn_t
2267dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2268{
2269 return dasd_default_erp_postaction;
2270}
2271
5a27e60d
SW		 2272static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2273 struct dasd_ccw_req *cqr,
2274 struct irb *irb)
8e09f215
SW		 2275{
2276 char mask;
f3eb5384 2277 char *sense = NULL;
501183f2 2278 struct dasd_eckd_private *private;
8e09f215 2279
501183f2 2280 private = (struct dasd_eckd_private *) device->private;
8e09f215
SW		 2281 /* first of all check for state change pending interrupt */
2282 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 2283 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 2284 /*
2285 * for alias only, not in offline processing
2286 * and only if not suspended
2287 */
501183f2 2288 if (!device->block && private->lcu &&
25e2cf1c 2289 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 2290 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2291 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 2292 /*
2293 * the state change could be caused by an alias
2294 * reassignment remove device from alias handling
2295 * to prevent new requests from being scheduled on
2296 * the wrong alias device
2297 */
2298 dasd_alias_remove_device(device);
2299
2300 /* schedule worker to reload device */
2301 dasd_reload_device(device);
2302 }
8e09f215
SW		 2303 dasd_generic_handle_state_change(device);
2304 return;
2305 }
2306
a5a0061f 2307 sense = dasd_get_sense(irb);
5a27e60d
SW		 2308 if (!sense)
2309 return;
2310
2311 /* summary unit check */
c7a29e56 2312 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 2313 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
8e09f215
SW		 2314 dasd_alias_handle_summary_unit_check(device, irb);
2315 return;
2316 }
2317
f60c768c 2318 /* service information message SIM */
5a27e60d 2319 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 2320 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2321 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 2322 return;
2323 }
2324
5a27e60d
SW		 2325 /* loss of device reservation is handled via base devices only
2326 * as alias devices may be used with several bases
2327 */
c7a29e56
SW		 2328 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
2329 (sense[7] == 0x3F) &&
5a27e60d
SW		 2330 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
2331 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
2332 if (device->features & DASD_FEATURE_FAILONSLCK)
2333 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
2334 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
2335 dev_err(&device->cdev->dev,
2336 "The device reservation was lost\n");
ada3df91 2337 }
5a27e60d 2338}
f3eb5384
SW		 2339
2340static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
2341 struct dasd_device *startdev,
8e09f215 2342 struct dasd_block *block,
f3eb5384
SW		 2343 struct request *req,
2344 sector_t first_rec,
2345 sector_t last_rec,
2346 sector_t first_trk,
2347 sector_t last_trk,
2348 unsigned int first_offs,
2349 unsigned int last_offs,
2350 unsigned int blk_per_trk,
2351 unsigned int blksize)
1da177e4
LT		 2352{
2353 struct dasd_eckd_private *private;
2354 unsigned long *idaws;
2355 struct LO_eckd_data *LO_data;
2356 struct dasd_ccw_req *cqr;
2357 struct ccw1 *ccw;
5705f702 2358 struct req_iterator iter;
1da177e4
LT		 2359 struct bio_vec *bv;
2360 char *dst;
f3eb5384 2361 unsigned int off;
1da177e4 2362 int count, cidaw, cplength, datasize;
f3eb5384 2363 sector_t recid;
1da177e4 2364 unsigned char cmd, rcmd;
8e09f215
SW		 2365 int use_prefix;
2366 struct dasd_device *basedev;
1da177e4 2367
8e09f215
SW		 2368 basedev = block->base;
2369 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 2370 if (rq_data_dir(req) == READ)
2371 cmd = DASD_ECKD_CCW_READ_MT;
2372 else if (rq_data_dir(req) == WRITE)
2373 cmd = DASD_ECKD_CCW_WRITE_MT;
2374 else
2375 return ERR_PTR(-EINVAL);
f3eb5384 2376
1da177e4
LT		 2377 /* Check struct bio and count the number of blocks for the request. */
2378 count = 0;
2379 cidaw = 0;
5705f702 2380 rq_for_each_segment(bv, req, iter) {
6c92e699
JA		 2381 if (bv->bv_len & (blksize - 1))
2382 /* Eckd can only do full blocks. */
2383 return ERR_PTR(-EINVAL);
8e09f215 2384 count += bv->bv_len >> (block->s2b_shift + 9);
347a8dc3 2385#if defined(CONFIG_64BIT)
6c92e699 2386 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
8e09f215 2387 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1da177e4 2388#endif
1da177e4
LT		 2389 }
2390 /* Paranoia. */
2391 if (count != last_rec - first_rec + 1)
2392 return ERR_PTR(-EINVAL);
8e09f215
SW		 2393
2394 /* use the prefix command if available */
2395 use_prefix = private->features.feature[8] & 0x01;
2396 if (use_prefix) {
2397 /* 1x prefix + number of blocks */
2398 cplength = 2 + count;
2399 /* 1x prefix + cidaws*sizeof(long) */
2400 datasize = sizeof(struct PFX_eckd_data) +
2401 sizeof(struct LO_eckd_data) +
2402 cidaw * sizeof(unsigned long);
2403 } else {
2404 /* 1x define extent + 1x locate record + number of blocks */
2405 cplength = 2 + count;
2406 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2407 datasize = sizeof(struct DE_eckd_data) +
2408 sizeof(struct LO_eckd_data) +
2409 cidaw * sizeof(unsigned long);
2410 }
1da177e4
LT		 2411 /* Find out the number of additional locate record ccws for cdl. */
2412 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
2413 if (last_rec >= 2*blk_per_trk)
2414 count = 2*blk_per_trk - first_rec;
2415 cplength += count;
2416 datasize += count*sizeof(struct LO_eckd_data);
2417 }
2418 /* Allocate the ccw request. */
68b781fe
SH		 2419 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2420 startdev);
1da177e4
LT		 2421 if (IS_ERR(cqr))
2422 return cqr;
2423 ccw = cqr->cpaddr;
8e09f215
SW		 2424 /* First ccw is define extent or prefix. */
2425 if (use_prefix) {
2426 if (prefix(ccw++, cqr->data, first_trk,
2427 last_trk, cmd, basedev, startdev) == -EAGAIN) {
2428 /* Clock not in sync and XRC is enabled.
2429 * Try again later.
2430 */
2431 dasd_sfree_request(cqr, startdev);
2432 return ERR_PTR(-EAGAIN);
2433 }
2434 idaws = (unsigned long *) (cqr->data +
2435 sizeof(struct PFX_eckd_data));
2436 } else {
2437 if (define_extent(ccw++, cqr->data, first_trk,
b38f27e8 2438 last_trk, cmd, basedev) == -EAGAIN) {
8e09f215
SW		 2439 /* Clock not in sync and XRC is enabled.
2440 * Try again later.
2441 */
2442 dasd_sfree_request(cqr, startdev);
2443 return ERR_PTR(-EAGAIN);
2444 }
2445 idaws = (unsigned long *) (cqr->data +
2446 sizeof(struct DE_eckd_data));
d54853ef 2447 }
1da177e4 2448 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 2449 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
2450 recid = first_rec;
2451 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
2452 /* Only standard blocks so there is just one locate record. */
2453 ccw[-1].flags |= CCW_FLAG_CC;
2454 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 2455 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 2456 }
5705f702 2457 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 2458 dst = page_address(bv->bv_page) + bv->bv_offset;
2459 if (dasd_page_cache) {
2460 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 2461 GFP_DMA | __GFP_NOWARN);
1da177e4
LT		 2462 if (copy && rq_data_dir(req) == WRITE)
2463 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
2464 if (copy)
2465 dst = copy + bv->bv_offset;
2466 }
2467 for (off = 0; off < bv->bv_len; off += blksize) {
2468 sector_t trkid = recid;
2469 unsigned int recoffs = sector_div(trkid, blk_per_trk);
2470 rcmd = cmd;
2471 count = blksize;
2472 /* Locate record for cdl special block ? */
2473 if (private->uses_cdl && recid < 2*blk_per_trk) {
2474 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
2475 rcmd |= 0x8;
2476 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 2477 if (count < blksize &&
2478 rq_data_dir(req) == READ)
1da177e4
LT		 2479 memset(dst + count, 0xe5,
2480 blksize - count);
2481 }
2482 ccw[-1].flags |= CCW_FLAG_CC;
2483 locate_record(ccw++, LO_data++,
2484 trkid, recoffs + 1,
8e09f215 2485 1, rcmd, basedev, count);
1da177e4
LT		 2486 }
2487 /* Locate record for standard blocks ? */
2488 if (private->uses_cdl && recid == 2*blk_per_trk) {
2489 ccw[-1].flags |= CCW_FLAG_CC;
2490 locate_record(ccw++, LO_data++,
2491 trkid, recoffs + 1,
2492 last_rec - recid + 1,
8e09f215 2493 cmd, basedev, count);
1da177e4
LT		 2494 }
2495 /* Read/write ccw. */
2496 ccw[-1].flags |= CCW_FLAG_CC;
2497 ccw->cmd_code = rcmd;
2498 ccw->count = count;
2499 if (idal_is_needed(dst, blksize)) {
2500 ccw->cda = (__u32)(addr_t) idaws;
2501 ccw->flags = CCW_FLAG_IDA;
2502 idaws = idal_create_words(idaws, dst, blksize);
2503 } else {
2504 ccw->cda = (__u32)(addr_t) dst;
2505 ccw->flags = 0;
2506 }
2507 ccw++;
2508 dst += blksize;
2509 recid++;
2510 }
2511 }
13de227b
HS		 2512 if (blk_noretry_request(req) ||
2513 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 2514 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 2515 cqr->startdev = startdev;
2516 cqr->memdev = startdev;
2517 cqr->block = block;
7c8faa86 2518 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2519 cqr->lpm = startdev->path_data.ppm;
1da177e4
LT		 2520 cqr->retries = 256;
2521 cqr->buildclk = get_clock();
2522 cqr->status = DASD_CQR_FILLED;
2523 return cqr;
2524}
2525
f3eb5384
SW		 2526static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
2527 struct dasd_device *startdev,
2528 struct dasd_block *block,
2529 struct request *req,
2530 sector_t first_rec,
2531 sector_t last_rec,
2532 sector_t first_trk,
2533 sector_t last_trk,
2534 unsigned int first_offs,
2535 unsigned int last_offs,
2536 unsigned int blk_per_trk,
2537 unsigned int blksize)
2538{
f3eb5384
SW		 2539 unsigned long *idaws;
2540 struct dasd_ccw_req *cqr;
2541 struct ccw1 *ccw;
2542 struct req_iterator iter;
2543 struct bio_vec *bv;
2544 char *dst, *idaw_dst;
2545 unsigned int cidaw, cplength, datasize;
2546 unsigned int tlf;
2547 sector_t recid;
2548 unsigned char cmd;
2549 struct dasd_device *basedev;
2550 unsigned int trkcount, count, count_to_trk_end;
2551 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2552 unsigned char new_track, end_idaw;
2553 sector_t trkid;
2554 unsigned int recoffs;
2555
2556 basedev = block->base;
f3eb5384
SW		 2557 if (rq_data_dir(req) == READ)
2558 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2559 else if (rq_data_dir(req) == WRITE)
2560 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2561 else
2562 return ERR_PTR(-EINVAL);
2563
2564 /* Track based I/O needs IDAWs for each page, and not just for
2565 * 64 bit addresses. We need additional idals for pages
2566 * that get filled from two tracks, so we use the number
2567 * of records as upper limit.
2568 */
2569 cidaw = last_rec - first_rec + 1;
2570 trkcount = last_trk - first_trk + 1;
2571
2572 /* 1x prefix + one read/write ccw per track */
2573 cplength = 1 + trkcount;
2574
2575 /* on 31-bit we need space for two 32 bit addresses per page
2576 * on 64-bit one 64 bit address
2577 */
2578 datasize = sizeof(struct PFX_eckd_data) +
2579 cidaw * sizeof(unsigned long long);
2580
2581 /* Allocate the ccw request. */
68b781fe
SH		 2582 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2583 startdev);
f3eb5384
SW		 2584 if (IS_ERR(cqr))
2585 return cqr;
2586 ccw = cqr->cpaddr;
2587 /* transfer length factor: how many bytes to read from the last track */
2588 if (first_trk == last_trk)
2589 tlf = last_offs - first_offs + 1;
2590 else
2591 tlf = last_offs + 1;
2592 tlf *= blksize;
2593
2594 if (prefix_LRE(ccw++, cqr->data, first_trk,
2595 last_trk, cmd, basedev, startdev,
2596 1 /* format */, first_offs + 1,
2597 trkcount, blksize,
2598 tlf) == -EAGAIN) {
2599 /* Clock not in sync and XRC is enabled.
2600 * Try again later.
2601 */
2602 dasd_sfree_request(cqr, startdev);
2603 return ERR_PTR(-EAGAIN);
2604 }
2605
2606 /*
2607 * The translation of request into ccw programs must meet the
2608 * following conditions:
2609 * - all idaws but the first and the last must address full pages
2610 * (or 2K blocks on 31-bit)
2611 * - the scope of a ccw and it's idal ends with the track boundaries
2612 */
2613 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2614 recid = first_rec;
2615 new_track = 1;
2616 end_idaw = 0;
2617 len_to_track_end = 0;
246ccea1 2618 idaw_dst = NULL;
f3eb5384
SW		 2619 idaw_len = 0;
2620 rq_for_each_segment(bv, req, iter) {
2621 dst = page_address(bv->bv_page) + bv->bv_offset;
2622 seg_len = bv->bv_len;
2623 while (seg_len) {
2624 if (new_track) {
2625 trkid = recid;
2626 recoffs = sector_div(trkid, blk_per_trk);
2627 count_to_trk_end = blk_per_trk - recoffs;
2628 count = min((last_rec - recid + 1),
2629 (sector_t)count_to_trk_end);
2630 len_to_track_end = count * blksize;
2631 ccw[-1].flags |= CCW_FLAG_CC;
2632 ccw->cmd_code = cmd;
2633 ccw->count = len_to_track_end;
2634 ccw->cda = (__u32)(addr_t)idaws;
2635 ccw->flags = CCW_FLAG_IDA;
2636 ccw++;
2637 recid += count;
2638 new_track = 0;
52db45c3
SW		 2639 /* first idaw for a ccw may start anywhere */
2640 if (!idaw_dst)
2641 idaw_dst = dst;
f3eb5384 2642 }
52db45c3
SW		 2643 /* If we start a new idaw, we must make sure that it
2644 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2645 * If we continue an idaw, we must make sure that the
2646 * current segment begins where the so far accumulated
2647 * idaw ends
2648 */
52db45c3
SW		 2649 if (!idaw_dst) {
2650 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2651 dasd_sfree_request(cqr, startdev);
2652 return ERR_PTR(-ERANGE);
2653 } else
2654 idaw_dst = dst;
2655 }
f3eb5384
SW		 2656 if ((idaw_dst + idaw_len) != dst) {
2657 dasd_sfree_request(cqr, startdev);
2658 return ERR_PTR(-ERANGE);
2659 }
2660 part_len = min(seg_len, len_to_track_end);
2661 seg_len -= part_len;
2662 dst += part_len;
2663 idaw_len += part_len;
2664 len_to_track_end -= part_len;
2665 /* collected memory area ends on an IDA_BLOCK border,
2666 * -> create an idaw
2667 * idal_create_words will handle cases where idaw_len
2668 * is larger then IDA_BLOCK_SIZE
2669 */
2670 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2671 end_idaw = 1;
2672 /* We also need to end the idaw at track end */
2673 if (!len_to_track_end) {
2674 new_track = 1;
2675 end_idaw = 1;
2676 }
2677 if (end_idaw) {
2678 idaws = idal_create_words(idaws, idaw_dst,
2679 idaw_len);
246ccea1 2680 idaw_dst = NULL;
f3eb5384
SW		 2681 idaw_len = 0;
2682 end_idaw = 0;
2683 }
2684 }
2685 }
2686
2687 if (blk_noretry_request(req) ||
2688 block->base->features & DASD_FEATURE_FAILFAST)
2689 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2690 cqr->startdev = startdev;
2691 cqr->memdev = startdev;
2692 cqr->block = block;
7c8faa86 2693 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2694 cqr->lpm = startdev->path_data.ppm;
f3eb5384
SW		 2695 cqr->retries = 256;
2696 cqr->buildclk = get_clock();
2697 cqr->status = DASD_CQR_FILLED;
2698 return cqr;
2699}
2700
2701static int prepare_itcw(struct itcw *itcw,
2702 unsigned int trk, unsigned int totrk, int cmd,
2703 struct dasd_device *basedev,
2704 struct dasd_device *startdev,
2705 unsigned int rec_on_trk, int count,
2706 unsigned int blksize,
2707 unsigned int total_data_size,
2708 unsigned int tlf,
2709 unsigned int blk_per_trk)
2710{
2711 struct PFX_eckd_data pfxdata;
2712 struct dasd_eckd_private *basepriv, *startpriv;
2713 struct DE_eckd_data *dedata;
2714 struct LRE_eckd_data *lredata;
2715 struct dcw *dcw;
2716
2717 u32 begcyl, endcyl;
2718 u16 heads, beghead, endhead;
2719 u8 pfx_cmd;
2720
2721 int rc = 0;
2722 int sector = 0;
2723 int dn, d;
2724
2725
2726 /* setup prefix data */
2727 basepriv = (struct dasd_eckd_private *) basedev->private;
2728 startpriv = (struct dasd_eckd_private *) startdev->private;
2729 dedata = &pfxdata.define_extent;
2730 lredata = &pfxdata.locate_record;
2731
2732 memset(&pfxdata, 0, sizeof(pfxdata));
2733 pfxdata.format = 1; /* PFX with LRE */
2734 pfxdata.base_address = basepriv->ned->unit_addr;
2735 pfxdata.base_lss = basepriv->ned->ID;
2736 pfxdata.validity.define_extent = 1;
2737
2738 /* private uid is kept up to date, conf_data may be outdated */
2739 if (startpriv->uid.type != UA_BASE_DEVICE) {
2740 pfxdata.validity.verify_base = 1;
2741 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2742 pfxdata.validity.hyper_pav = 1;
2743 }
2744
2745 switch (cmd) {
2746 case DASD_ECKD_CCW_READ_TRACK_DATA:
2747 dedata->mask.perm = 0x1;
2748 dedata->attributes.operation = basepriv->attrib.operation;
2749 dedata->blk_size = blksize;
2750 dedata->ga_extended |= 0x42;
2751 lredata->operation.orientation = 0x0;
2752 lredata->operation.operation = 0x0C;
2753 lredata->auxiliary.check_bytes = 0x01;
2754 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2755 break;
2756 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2757 dedata->mask.perm = 0x02;
2758 dedata->attributes.operation = basepriv->attrib.operation;
2759 dedata->blk_size = blksize;
2760 rc = check_XRC_on_prefix(&pfxdata, basedev);
2761 dedata->ga_extended |= 0x42;
2762 lredata->operation.orientation = 0x0;
2763 lredata->operation.operation = 0x3F;
2764 lredata->extended_operation = 0x23;
2765 lredata->auxiliary.check_bytes = 0x2;
2766 pfx_cmd = DASD_ECKD_CCW_PFX;
2767 break;
2768 default:
2769 DBF_DEV_EVENT(DBF_ERR, basedev,
2770 "prepare itcw, unknown opcode 0x%x", cmd);
2771 BUG();
2772 break;
2773 }
2774 if (rc)
2775 return rc;
2776
2777 dedata->attributes.mode = 0x3; /* ECKD */
2778
2779 heads = basepriv->rdc_data.trk_per_cyl;
2780 begcyl = trk / heads;
2781 beghead = trk % heads;
2782 endcyl = totrk / heads;
2783 endhead = totrk % heads;
2784
2785 /* check for sequential prestage - enhance cylinder range */
2786 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2787 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2788
2789 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2790 endcyl += basepriv->attrib.nr_cyl;
2791 else
2792 endcyl = (basepriv->real_cyl - 1);
2793 }
2794
2795 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2796 set_ch_t(&dedata->end_ext, endcyl, endhead);
2797
2798 dedata->ep_format = 0x20; /* records per track is valid */
2799 dedata->ep_rec_per_track = blk_per_trk;
2800
2801 if (rec_on_trk) {
2802 switch (basepriv->rdc_data.dev_type) {
2803 case 0x3390:
2804 dn = ceil_quot(blksize + 6, 232);
2805 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2806 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2807 break;
2808 case 0x3380:
2809 d = 7 + ceil_quot(blksize + 12, 32);
2810 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2811 break;
2812 }
2813 }
2814
2815 lredata->auxiliary.length_valid = 1;
2816 lredata->auxiliary.length_scope = 1;
2817 lredata->auxiliary.imbedded_ccw_valid = 1;
2818 lredata->length = tlf;
2819 lredata->imbedded_ccw = cmd;
2820 lredata->count = count;
2821 lredata->sector = sector;
2822 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2823 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2824 lredata->search_arg.head = lredata->seek_addr.head;
2825 lredata->search_arg.record = rec_on_trk;
2826
2827 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2828 &pfxdata, sizeof(pfxdata), total_data_size);
364c18d8 2829 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0;
f3eb5384
SW		 2830}
2831
2832static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2833 struct dasd_device *startdev,
2834 struct dasd_block *block,
2835 struct request *req,
2836 sector_t first_rec,
2837 sector_t last_rec,
2838 sector_t first_trk,
2839 sector_t last_trk,
2840 unsigned int first_offs,
2841 unsigned int last_offs,
2842 unsigned int blk_per_trk,
2843 unsigned int blksize)
2844{
f3eb5384
SW		 2845 struct dasd_ccw_req *cqr;
2846 struct req_iterator iter;
2847 struct bio_vec *bv;
2848 char *dst;
2849 unsigned int trkcount, ctidaw;
2850 unsigned char cmd;
2851 struct dasd_device *basedev;
2852 unsigned int tlf;
2853 struct itcw *itcw;
2854 struct tidaw *last_tidaw = NULL;
2855 int itcw_op;
2856 size_t itcw_size;
ef19298b
SW		 2857 u8 tidaw_flags;
2858 unsigned int seg_len, part_len, len_to_track_end;
2859 unsigned char new_track;
2860 sector_t recid, trkid;
2861 unsigned int offs;
2862 unsigned int count, count_to_trk_end;
cd10502b 2863 int ret;
f3eb5384
SW		 2864
2865 basedev = block->base;
f3eb5384
SW		 2866 if (rq_data_dir(req) == READ) {
2867 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2868 itcw_op = ITCW_OP_READ;
2869 } else if (rq_data_dir(req) == WRITE) {
2870 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2871 itcw_op = ITCW_OP_WRITE;
2872 } else
2873 return ERR_PTR(-EINVAL);
2874
2875 /* trackbased I/O needs address all memory via TIDAWs,
2876 * not just for 64 bit addresses. This allows us to map
2877 * each segment directly to one tidaw.
ef19298b
SW		 2878 * In the case of write requests, additional tidaws may
2879 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 2880 */
2881 trkcount = last_trk - first_trk + 1;
2882 ctidaw = 0;
2883 rq_for_each_segment(bv, req, iter) {
2884 ++ctidaw;
2885 }
ef19298b
SW		 2886 if (rq_data_dir(req) == WRITE)
2887 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 2888
2889 /* Allocate the ccw request. */
2890 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 2891 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 2892 if (IS_ERR(cqr))
2893 return cqr;
2894
f3eb5384
SW		 2895 /* transfer length factor: how many bytes to read from the last track */
2896 if (first_trk == last_trk)
2897 tlf = last_offs - first_offs + 1;
2898 else
2899 tlf = last_offs + 1;
2900 tlf *= blksize;
2901
2902 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 2903 if (IS_ERR(itcw)) {
cd10502b
JL		 2904 ret = -EINVAL;
2905 goto out_error;
ef19298b 2906 }
f3eb5384 2907 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 2908 if (prepare_itcw(itcw, first_trk, last_trk,
2909 cmd, basedev, startdev,
2910 first_offs + 1,
2911 trkcount, blksize,
2912 (last_rec - first_rec + 1) * blksize,
2913 tlf, blk_per_trk) == -EAGAIN) {
2914 /* Clock not in sync and XRC is enabled.
2915 * Try again later.
2916 */
cd10502b
JL		 2917 ret = -EAGAIN;
2918 goto out_error;
f3eb5384 2919 }
d54cddb6 2920 len_to_track_end = 0;
f3eb5384
SW		 2921 /*
2922 * A tidaw can address 4k of memory, but must not cross page boundaries
2923 * We can let the block layer handle this by setting
2924 * blk_queue_segment_boundary to page boundaries and
2925 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 2926 * For write requests, a TIDAW must not cross track boundaries, because
2927 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 2928 */
ef19298b
SW		 2929 if (rq_data_dir(req) == WRITE) {
2930 new_track = 1;
2931 recid = first_rec;
2932 rq_for_each_segment(bv, req, iter) {
2933 dst = page_address(bv->bv_page) + bv->bv_offset;
2934 seg_len = bv->bv_len;
2935 while (seg_len) {
2936 if (new_track) {
2937 trkid = recid;
2938 offs = sector_div(trkid, blk_per_trk);
2939 count_to_trk_end = blk_per_trk - offs;
2940 count = min((last_rec - recid + 1),
2941 (sector_t)count_to_trk_end);
2942 len_to_track_end = count * blksize;
2943 recid += count;
2944 new_track = 0;
2945 }
2946 part_len = min(seg_len, len_to_track_end);
2947 seg_len -= part_len;
2948 len_to_track_end -= part_len;
2949 /* We need to end the tidaw at track end */
2950 if (!len_to_track_end) {
2951 new_track = 1;
2952 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
2953 } else
2954 tidaw_flags = 0;
2955 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
2956 dst, part_len);
cd10502b
JL		 2957 if (IS_ERR(last_tidaw)) {
2958 ret = -EINVAL;
2959 goto out_error;
2960 }
ef19298b
SW		 2961 dst += part_len;
2962 }
2963 }
2964 } else {
2965 rq_for_each_segment(bv, req, iter) {
2966 dst = page_address(bv->bv_page) + bv->bv_offset;
2967 last_tidaw = itcw_add_tidaw(itcw, 0x00,
2968 dst, bv->bv_len);
cd10502b
JL		 2969 if (IS_ERR(last_tidaw)) {
2970 ret = -EINVAL;
2971 goto out_error;
2972 }
ef19298b 2973 }
f3eb5384 2974 }
ef19298b
SW		 2975 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2976 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 2977 itcw_finalize(itcw);
2978
2979 if (blk_noretry_request(req) ||
2980 block->base->features & DASD_FEATURE_FAILFAST)
2981 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 2982 cqr->cpmode = 1;
f3eb5384
SW		 2983 cqr->startdev = startdev;
2984 cqr->memdev = startdev;
2985 cqr->block = block;
7c8faa86 2986 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2987 cqr->lpm = startdev->path_data.ppm;
f3eb5384
SW		 2988 cqr->retries = 256;
2989 cqr->buildclk = get_clock();
2990 cqr->status = DASD_CQR_FILLED;
2991 return cqr;
cd10502b
JL		 2992out_error:
2993 dasd_sfree_request(cqr, startdev);
2994 return ERR_PTR(ret);
f3eb5384
SW		 2995}
2996
2997static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2998 struct dasd_block *block,
2999 struct request *req)
3000{
ef19298b 3001 int cmdrtd, cmdwtd;
f3eb5384 3002 int use_prefix;
ef19298b 3003 int fcx_multitrack;
45b44d76 3004 struct dasd_eckd_private *private;
f3eb5384
SW		 3005 struct dasd_device *basedev;
3006 sector_t first_rec, last_rec;
3007 sector_t first_trk, last_trk;
3008 unsigned int first_offs, last_offs;
3009 unsigned int blk_per_trk, blksize;
3010 int cdlspecial;
ef19298b 3011 unsigned int data_size;
f3eb5384
SW		 3012 struct dasd_ccw_req *cqr;
3013
3014 basedev = block->base;
3015 private = (struct dasd_eckd_private *) basedev->private;
3016
3017 /* Calculate number of blocks/records per track. */
3018 blksize = block->bp_block;
3019 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 3020 if (blk_per_trk == 0)
3021 return ERR_PTR(-EINVAL);
f3eb5384 3022 /* Calculate record id of first and last block. */
83096ebf 3023 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 3024 first_offs = sector_div(first_trk, blk_per_trk);
3025 last_rec = last_trk =
83096ebf 3026 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 3027 last_offs = sector_div(last_trk, blk_per_trk);
3028 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3029
ef19298b
SW		 3030 fcx_multitrack = private->features.feature[40] & 0x20;
3031 data_size = blk_rq_bytes(req);
3032 /* tpm write request add CBC data on each track boundary */
3033 if (rq_data_dir(req) == WRITE)
3034 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 3035
3036 /* is read track data and write track data in command mode supported? */
3037 cmdrtd = private->features.feature[9] & 0x20;
3038 cmdwtd = private->features.feature[12] & 0x40;
3039 use_prefix = private->features.feature[8] & 0x01;
3040
3041 cqr = NULL;
3042 if (cdlspecial || dasd_page_cache) {
3043 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 3044 } else if ((data_size <= private->fcx_max_data)
3045 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 3046 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3047 first_rec, last_rec,
3048 first_trk, last_trk,
3049 first_offs, last_offs,
3050 blk_per_trk, blksize);
ef19298b
SW		 3051 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3052 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3053 cqr = NULL;
3054 } else if (use_prefix &&
3055 (((rq_data_dir(req) == READ) && cmdrtd) ||
3056 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3057 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3058 first_rec, last_rec,
3059 first_trk, last_trk,
3060 first_offs, last_offs,
3061 blk_per_trk, blksize);
ef19298b
SW		 3062 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3063 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3064 cqr = NULL;
3065 }
3066 if (!cqr)
3067 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3068 first_rec, last_rec,
3069 first_trk, last_trk,
3070 first_offs, last_offs,
3071 blk_per_trk, blksize);
3072 return cqr;
3073}
3074
e4dbb0f2
SH		 3075static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
3076 struct dasd_block *block,
3077 struct request *req)
3078{
e4dbb0f2
SH		 3079 unsigned long *idaws;
3080 struct dasd_device *basedev;
3081 struct dasd_ccw_req *cqr;
3082 struct ccw1 *ccw;
3083 struct req_iterator iter;
3084 struct bio_vec *bv;
3085 char *dst;
3086 unsigned char cmd;
3087 unsigned int trkcount;
3088 unsigned int seg_len, len_to_track_end;
3089 unsigned int first_offs;
3090 unsigned int cidaw, cplength, datasize;
3091 sector_t first_trk, last_trk;
3092 unsigned int pfx_datasize;
3093
3094 /*
3095 * raw track access needs to be mutiple of 64k and on 64k boundary
3096 */
3097 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) {
3098 cqr = ERR_PTR(-EINVAL);
3099 goto out;
3100 }
3101 if (((blk_rq_pos(req) + blk_rq_sectors(req)) %
3102 DASD_RAW_SECTORS_PER_TRACK) != 0) {
3103 cqr = ERR_PTR(-EINVAL);
3104 goto out;
3105 }
3106
3107 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3108 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3109 DASD_RAW_SECTORS_PER_TRACK;
3110 trkcount = last_trk - first_trk + 1;
3111 first_offs = 0;
3112 basedev = block->base;
e4dbb0f2
SH		 3113
3114 if (rq_data_dir(req) == READ)
3115 cmd = DASD_ECKD_CCW_READ_TRACK;
3116 else if (rq_data_dir(req) == WRITE)
3117 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3118 else {
3119 cqr = ERR_PTR(-EINVAL);
3120 goto out;
3121 }
3122
3123 /*
3124 * Raw track based I/O needs IDAWs for each page,
3125 * and not just for 64 bit addresses.
3126 */
3127 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3128
3129 /* 1x prefix + one read/write ccw per track */
3130 cplength = 1 + trkcount;
3131
3132 /*
3133 * struct PFX_eckd_data has up to 2 byte as extended parameter
3134 * this is needed for write full track and has to be mentioned
25985edc 3135 * separately
e4dbb0f2
SH		 3136 * add 8 instead of 2 to keep 8 byte boundary
3137 */
3138 pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
3139
3140 datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
3141
3142 /* Allocate the ccw request. */
3143 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3144 datasize, startdev);
3145 if (IS_ERR(cqr))
3146 goto out;
3147 ccw = cqr->cpaddr;
3148
3149 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
3150 basedev, startdev, 1 /* format */, first_offs + 1,
3151 trkcount, 0, 0) == -EAGAIN) {
3152 /* Clock not in sync and XRC is enabled.
3153 * Try again later.
3154 */
3155 dasd_sfree_request(cqr, startdev);
3156 cqr = ERR_PTR(-EAGAIN);
3157 goto out;
3158 }
3159
3160 idaws = (unsigned long *)(cqr->data + pfx_datasize);
3161
3162 len_to_track_end = 0;
3163
3164 rq_for_each_segment(bv, req, iter) {
3165 dst = page_address(bv->bv_page) + bv->bv_offset;
3166 seg_len = bv->bv_len;
3167 if (!len_to_track_end) {
3168 ccw[-1].flags |= CCW_FLAG_CC;
3169 ccw->cmd_code = cmd;
3170 /* maximum 3390 track size */
3171 ccw->count = 57326;
3172 /* 64k map to one track */
3173 len_to_track_end = 65536;
3174 ccw->cda = (__u32)(addr_t)idaws;
3175 ccw->flags |= CCW_FLAG_IDA;
3176 ccw->flags |= CCW_FLAG_SLI;
3177 ccw++;
3178 }
3179 len_to_track_end -= seg_len;
3180 idaws = idal_create_words(idaws, dst, seg_len);
3181 }
3182
3183 if (blk_noretry_request(req) ||
3184 block->base->features & DASD_FEATURE_FAILFAST)
3185 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3186 cqr->startdev = startdev;
3187 cqr->memdev = startdev;
3188 cqr->block = block;
3189 cqr->expires = startdev->default_expires * HZ;
3190 cqr->lpm = startdev->path_data.ppm;
3191 cqr->retries = 256;
3192 cqr->buildclk = get_clock();
3193 cqr->status = DASD_CQR_FILLED;
3194
3195 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
3196 cqr = NULL;
3197out:
3198 return cqr;
3199}
3200
3201
1da177e4
LT		 3202static int
3203dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3204{
3205 struct dasd_eckd_private *private;
3206 struct ccw1 *ccw;
5705f702 3207 struct req_iterator iter;
1da177e4
LT		 3208 struct bio_vec *bv;
3209 char *dst, *cda;
3210 unsigned int blksize, blk_per_trk, off;
3211 sector_t recid;
5705f702 3212 int status;
1da177e4
LT		 3213
3214 if (!dasd_page_cache)
3215 goto out;
8e09f215
SW		 3216 private = (struct dasd_eckd_private *) cqr->block->base->private;
3217 blksize = cqr->block->bp_block;
1da177e4 3218 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 3219 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 3220 ccw = cqr->cpaddr;
3221 /* Skip over define extent & locate record. */
3222 ccw++;
3223 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3224 ccw++;
5705f702 3225 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 3226 dst = page_address(bv->bv_page) + bv->bv_offset;
3227 for (off = 0; off < bv->bv_len; off += blksize) {
3228 /* Skip locate record. */
3229 if (private->uses_cdl && recid <= 2*blk_per_trk)
3230 ccw++;
3231 if (dst) {
3232 if (ccw->flags & CCW_FLAG_IDA)
3233 cda = *((char **)((addr_t) ccw->cda));
3234 else
3235 cda = (char *)((addr_t) ccw->cda);
3236 if (dst != cda) {
3237 if (rq_data_dir(req) == READ)
3238 memcpy(dst, cda, bv->bv_len);
3239 kmem_cache_free(dasd_page_cache,
3240 (void *)((addr_t)cda & PAGE_MASK));
3241 }
3242 dst = NULL;
3243 }
3244 ccw++;
3245 recid++;
3246 }
3247 }
3248out:
3249 status = cqr->status == DASD_CQR_DONE;
8e09f215 3250 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3251 return status;
3252}
3253
8e09f215 3254/*
f3eb5384 3255 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 3256 *
3257 * Note that this is not enough to restart the cqr!
3258 * Either reset cqr->startdev as well (summary unit check handling)
3259 * or restart via separate cqr (as in ERP handling).
3260 */
3261void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3262{
3263 struct ccw1 *ccw;
3264 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 3265 struct tcw *tcw;
3266 struct tccb *tccb;
3267 struct dcw *dcw;
3268
3269 if (cqr->cpmode == 1) {
3270 tcw = cqr->cpaddr;
3271 tccb = tcw_get_tccb(tcw);
3272 dcw = (struct dcw *)&tccb->tca[0];
3273 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 3274 pfxdata->validity.verify_base = 0;
3275 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 3276 } else {
3277 ccw = cqr->cpaddr;
3278 pfxdata = cqr->data;
3279 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
3280 pfxdata->validity.verify_base = 0;
3281 pfxdata->validity.hyper_pav = 0;
3282 }
8e09f215
SW		 3283 }
3284}
3285
3286#define DASD_ECKD_CHANQ_MAX_SIZE 4
3287
3288static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
3289 struct dasd_block *block,
3290 struct request *req)
3291{
3292 struct dasd_eckd_private *private;
3293 struct dasd_device *startdev;
3294 unsigned long flags;
3295 struct dasd_ccw_req *cqr;
3296
3297 startdev = dasd_alias_get_start_dev(base);
3298 if (!startdev)
3299 startdev = base;
3300 private = (struct dasd_eckd_private *) startdev->private;
3301 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
3302 return ERR_PTR(-EBUSY);
3303
3304 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
3305 private->count++;
e4dbb0f2
SH		 3306 if ((base->features & DASD_FEATURE_USERAW))
3307 cqr = dasd_raw_build_cp(startdev, block, req);
3308 else
3309 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 3310 if (IS_ERR(cqr))
3311 private->count--;
3312 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
3313 return cqr;
3314}
3315
3316static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
3317 struct request *req)
3318{
3319 struct dasd_eckd_private *private;
3320 unsigned long flags;
3321
3322 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
3323 private = (struct dasd_eckd_private *) cqr->memdev->private;
3324 private->count--;
3325 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
3326 return dasd_eckd_free_cp(cqr, req);
3327}
3328
1da177e4
LT		 3329static int
3330dasd_eckd_fill_info(struct dasd_device * device,
3331 struct dasd_information2_t * info)
3332{
3333 struct dasd_eckd_private *private;
3334
3335 private = (struct dasd_eckd_private *) device->private;
3336 info->label_block = 2;
3337 info->FBA_layout = private->uses_cdl ? 0 : 1;
3338 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
3339 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
3340 memcpy(info->characteristics, &private->rdc_data,
3341 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 3342 info->confdata_size = min((unsigned long)private->conf_len,
3343 sizeof(info->configuration_data));
3344 memcpy(info->configuration_data, private->conf_data,
3345 info->confdata_size);
1da177e4
LT		 3346 return 0;
3347}
3348
3349/*
3350 * SECTION: ioctl functions for eckd devices.
3351 */
3352
3353/*
3354 * Release device ioctl.
138c014d 3355 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 3356 * (see dasd_eckd_reserve) device.
3357 */
3358static int
1107ccfb 3359dasd_eckd_release(struct dasd_device *device)
1da177e4 3360{
1da177e4
LT		 3361 struct dasd_ccw_req *cqr;
3362 int rc;
f3eb5384 3363 struct ccw1 *ccw;
f932bcea 3364 int useglobal;
1da177e4
LT		 3365
3366 if (!capable(CAP_SYS_ADMIN))
3367 return -EACCES;
3368
f932bcea 3369 useglobal = 0;
68b781fe 3370 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3371 if (IS_ERR(cqr)) {
f932bcea
SW		 3372 mutex_lock(&dasd_reserve_mutex);
3373 useglobal = 1;
3374 cqr = &dasd_reserve_req->cqr;
3375 memset(cqr, 0, sizeof(*cqr));
3376 memset(&dasd_reserve_req->ccw, 0,
3377 sizeof(dasd_reserve_req->ccw));
3378 cqr->cpaddr = &dasd_reserve_req->ccw;
3379 cqr->data = &dasd_reserve_req->data;
3380 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3381 }
f3eb5384
SW		 3382 ccw = cqr->cpaddr;
3383 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
3384 ccw->flags |= CCW_FLAG_SLI;
3385 ccw->count = 32;
3386 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3387 cqr->startdev = device;
3388 cqr->memdev = device;
1da177e4 3389 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3390 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3391 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 3392 cqr->expires = 2 * HZ;
3393 cqr->buildclk = get_clock();
3394 cqr->status = DASD_CQR_FILLED;
3395
3396 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3397 if (!rc)
3398 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3399
f932bcea
SW		 3400 if (useglobal)
3401 mutex_unlock(&dasd_reserve_mutex);
3402 else
3403 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3404 return rc;
3405}
3406
3407/*
3408 * Reserve device ioctl.
3409 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 3410 * 'timeout the request'. This leads to a terminate IO if
3411 * the interrupt is outstanding for a certain time.
1da177e4
LT		 3412 */
3413static int
1107ccfb 3414dasd_eckd_reserve(struct dasd_device *device)
1da177e4 3415{
1da177e4
LT		 3416 struct dasd_ccw_req *cqr;
3417 int rc;
f3eb5384 3418 struct ccw1 *ccw;
f932bcea 3419 int useglobal;
1da177e4
LT		 3420
3421 if (!capable(CAP_SYS_ADMIN))
3422 return -EACCES;
3423
f932bcea 3424 useglobal = 0;
68b781fe 3425 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3426 if (IS_ERR(cqr)) {
f932bcea
SW		 3427 mutex_lock(&dasd_reserve_mutex);
3428 useglobal = 1;
3429 cqr = &dasd_reserve_req->cqr;
3430 memset(cqr, 0, sizeof(*cqr));
3431 memset(&dasd_reserve_req->ccw, 0,
3432 sizeof(dasd_reserve_req->ccw));
3433 cqr->cpaddr = &dasd_reserve_req->ccw;
3434 cqr->data = &dasd_reserve_req->data;
3435 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3436 }
f3eb5384
SW		 3437 ccw = cqr->cpaddr;
3438 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
3439 ccw->flags |= CCW_FLAG_SLI;
3440 ccw->count = 32;
3441 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3442 cqr->startdev = device;
3443 cqr->memdev = device;
1da177e4 3444 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3445 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3446 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 3447 cqr->expires = 2 * HZ;
3448 cqr->buildclk = get_clock();
3449 cqr->status = DASD_CQR_FILLED;
3450
3451 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3452 if (!rc)
3453 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3454
f932bcea
SW		 3455 if (useglobal)
3456 mutex_unlock(&dasd_reserve_mutex);
3457 else
3458 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3459 return rc;
3460}
3461
3462/*
3463 * Steal lock ioctl - unconditional reserve device.
138c014d 3464 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 3465 * (unconditional reserve)
3466 */
3467static int
1107ccfb 3468dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 3469{
1da177e4
LT		 3470 struct dasd_ccw_req *cqr;
3471 int rc;
f3eb5384 3472 struct ccw1 *ccw;
f932bcea 3473 int useglobal;
1da177e4
LT		 3474
3475 if (!capable(CAP_SYS_ADMIN))
3476 return -EACCES;
3477
f932bcea 3478 useglobal = 0;
68b781fe 3479 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3480 if (IS_ERR(cqr)) {
f932bcea
SW		 3481 mutex_lock(&dasd_reserve_mutex);
3482 useglobal = 1;
3483 cqr = &dasd_reserve_req->cqr;
3484 memset(cqr, 0, sizeof(*cqr));
3485 memset(&dasd_reserve_req->ccw, 0,
3486 sizeof(dasd_reserve_req->ccw));
3487 cqr->cpaddr = &dasd_reserve_req->ccw;
3488 cqr->data = &dasd_reserve_req->data;
3489 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3490 }
f3eb5384
SW		 3491 ccw = cqr->cpaddr;
3492 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
3493 ccw->flags |= CCW_FLAG_SLI;
3494 ccw->count = 32;
3495 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3496 cqr->startdev = device;
3497 cqr->memdev = device;
1da177e4 3498 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3499 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3500 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 3501 cqr->expires = 2 * HZ;
3502 cqr->buildclk = get_clock();
3503 cqr->status = DASD_CQR_FILLED;
3504
3505 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3506 if (!rc)
3507 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3508
f932bcea
SW		 3509 if (useglobal)
3510 mutex_unlock(&dasd_reserve_mutex);
3511 else
3512 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3513 return rc;
3514}
3515
196339f1
SW		 3516/*
3517 * SNID - Sense Path Group ID
3518 * This ioctl may be used in situations where I/O is stalled due to
3519 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3520 * preallocated dasd_reserve_req.
3521 */
3522static int dasd_eckd_snid(struct dasd_device *device,
3523 void __user *argp)
3524{
3525 struct dasd_ccw_req *cqr;
3526 int rc;
3527 struct ccw1 *ccw;
3528 int useglobal;
3529 struct dasd_snid_ioctl_data usrparm;
3530
3531 if (!capable(CAP_SYS_ADMIN))
3532 return -EACCES;
3533
3534 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3535 return -EFAULT;
3536
3537 useglobal = 0;
3538 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
3539 sizeof(struct dasd_snid_data), device);
3540 if (IS_ERR(cqr)) {
3541 mutex_lock(&dasd_reserve_mutex);
3542 useglobal = 1;
3543 cqr = &dasd_reserve_req->cqr;
3544 memset(cqr, 0, sizeof(*cqr));
3545 memset(&dasd_reserve_req->ccw, 0,
3546 sizeof(dasd_reserve_req->ccw));
3547 cqr->cpaddr = &dasd_reserve_req->ccw;
3548 cqr->data = &dasd_reserve_req->data;
3549 cqr->magic = DASD_ECKD_MAGIC;
3550 }
3551 ccw = cqr->cpaddr;
3552 ccw->cmd_code = DASD_ECKD_CCW_SNID;
3553 ccw->flags |= CCW_FLAG_SLI;
3554 ccw->count = 12;
3555 ccw->cda = (__u32)(addr_t) cqr->data;
3556 cqr->startdev = device;
3557 cqr->memdev = device;
3558 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3559 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 3560 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 3561 cqr->retries = 5;
3562 cqr->expires = 10 * HZ;
3563 cqr->buildclk = get_clock();
3564 cqr->status = DASD_CQR_FILLED;
3565 cqr->lpm = usrparm.path_mask;
3566
3567 rc = dasd_sleep_on_immediatly(cqr);
3568 /* verify that I/O processing didn't modify the path mask */
3569 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
3570 rc = -EIO;
3571 if (!rc) {
3572 usrparm.data = *((struct dasd_snid_data *)cqr->data);
3573 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
3574 rc = -EFAULT;
3575 }
3576
3577 if (useglobal)
3578 mutex_unlock(&dasd_reserve_mutex);
3579 else
3580 dasd_sfree_request(cqr, cqr->memdev);
3581 return rc;
3582}
3583
1da177e4
LT		 3584/*
3585 * Read performance statistics
3586 */
3587static int
1107ccfb 3588dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 3589{
1da177e4
LT		 3590 struct dasd_psf_prssd_data *prssdp;
3591 struct dasd_rssd_perf_stats_t *stats;
3592 struct dasd_ccw_req *cqr;
3593 struct ccw1 *ccw;
3594 int rc;
3595
68b781fe 3596 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 3597 (sizeof(struct dasd_psf_prssd_data) +
3598 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 3599 device);
3600 if (IS_ERR(cqr)) {
fc19f381 3601 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 3602 "Could not allocate initialization request");
3603 return PTR_ERR(cqr);
3604 }
8e09f215
SW		 3605 cqr->startdev = device;
3606 cqr->memdev = device;
1da177e4 3607 cqr->retries = 0;
eb6e199b 3608 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 3609 cqr->expires = 10 * HZ;
3610
3611 /* Prepare for Read Subsystem Data */
3612 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 3613 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 3614 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 3615 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 3616 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
3617
3618 ccw = cqr->cpaddr;
3619 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 3620 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 3621 ccw->flags |= CCW_FLAG_CC;
3622 ccw->cda = (__u32)(addr_t) prssdp;
3623
3624 /* Read Subsystem Data - Performance Statistics */
3625 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 3626 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 3627
3628 ccw++;
3629 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 3630 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 3631 ccw->cda = (__u32)(addr_t) stats;
3632
3633 cqr->buildclk = get_clock();
3634 cqr->status = DASD_CQR_FILLED;
3635 rc = dasd_sleep_on(cqr);
3636 if (rc == 0) {
1da177e4
LT		 3637 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3638 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 3639 if (copy_to_user(argp, stats,
3640 sizeof(struct dasd_rssd_perf_stats_t)))
3641 rc = -EFAULT;
1da177e4 3642 }
8e09f215 3643 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3644 return rc;
3645}
3646
3647/*
3648 * Get attributes (cache operations)
3649 * Returnes the cache attributes used in Define Extend (DE).
3650 */
3651static int
1107ccfb 3652dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3653{
1107ccfb
CH		 3654 struct dasd_eckd_private *private =
3655 (struct dasd_eckd_private *)device->private;
3656 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 3657 int rc;
3658
3659 if (!capable(CAP_SYS_ADMIN))
3660 return -EACCES;
1107ccfb 3661 if (!argp)
1da177e4
LT		 3662 return -EINVAL;
3663
1107ccfb
CH		 3664 rc = 0;
3665 if (copy_to_user(argp, (long *) &attrib,
8e09f215 3666 sizeof(struct attrib_data_t)))
1107ccfb 3667 rc = -EFAULT;
1da177e4
LT		 3668
3669 return rc;
3670}
3671
3672/*
3673 * Set attributes (cache operations)
3674 * Stores the attributes for cache operation to be used in Define Extend (DE).
3675 */
3676static int
1107ccfb 3677dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3678{
1107ccfb
CH		 3679 struct dasd_eckd_private *private =
3680 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 3681 struct attrib_data_t attrib;
3682
3683 if (!capable(CAP_SYS_ADMIN))
3684 return -EACCES;
1107ccfb 3685 if (!argp)
1da177e4
LT		 3686 return -EINVAL;
3687
1107ccfb 3688 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 3689 return -EFAULT;
1da177e4
LT		 3690 private->attrib = attrib;
3691
fc19f381
SH		 3692 dev_info(&device->cdev->dev,
3693 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3694 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 3695 return 0;
3696}
3697
ab1d848f
NH		 3698/*
3699 * Issue syscall I/O to EMC Symmetrix array.
3700 * CCWs are PSF and RSSD
3701 */
3702static int dasd_symm_io(struct dasd_device *device, void __user *argp)
3703{
3704 struct dasd_symmio_parms usrparm;
3705 char *psf_data, *rssd_result;
3706 struct dasd_ccw_req *cqr;
3707 struct ccw1 *ccw;
52898025 3708 char psf0, psf1;
ab1d848f
NH		 3709 int rc;
3710
52898025
NH		 3711 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
3712 return -EACCES;
3713 psf0 = psf1 = 0;
3714
ab1d848f
NH		 3715 /* Copy parms from caller */
3716 rc = -EFAULT;
3717 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3718 goto out;
f8b06859
HC		 3719 if (is_compat_task() || sizeof(long) == 4) {
3720 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 3721 rc = -EINVAL;
f8b06859
HC		 3722 if ((usrparm.psf_data >> 32) != 0)
3723 goto out;
3724 if ((usrparm.rssd_result >> 32) != 0)
3725 goto out;
3726 usrparm.psf_data &= 0x7fffffffULL;
3727 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 3728 }
ab1d848f
NH		 3729 /* alloc I/O data area */
3730 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
3731 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
3732 if (!psf_data || !rssd_result) {
3733 rc = -ENOMEM;
3734 goto out_free;
3735 }
3736
3737 /* get syscall header from user space */
3738 rc = -EFAULT;
3739 if (copy_from_user(psf_data,
3740 (void __user *)(unsigned long) usrparm.psf_data,
3741 usrparm.psf_data_len))
3742 goto out_free;
52898025
NH		 3743 psf0 = psf_data[0];
3744 psf1 = psf_data[1];
ab1d848f
NH		 3745
3746 /* setup CCWs for PSF + RSSD */
68b781fe 3747 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 3748 if (IS_ERR(cqr)) {
fc19f381 3749 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 3750 "Could not allocate initialization request");
3751 rc = PTR_ERR(cqr);
3752 goto out_free;
3753 }
3754
3755 cqr->startdev = device;
3756 cqr->memdev = device;
3757 cqr->retries = 3;
3758 cqr->expires = 10 * HZ;
3759 cqr->buildclk = get_clock();
3760 cqr->status = DASD_CQR_FILLED;
3761
3762 /* Build the ccws */
3763 ccw = cqr->cpaddr;
3764
3765 /* PSF ccw */
3766 ccw->cmd_code = DASD_ECKD_CCW_PSF;
3767 ccw->count = usrparm.psf_data_len;
3768 ccw->flags |= CCW_FLAG_CC;
3769 ccw->cda = (__u32)(addr_t) psf_data;
3770
3771 ccw++;
3772
3773 /* RSSD ccw */
3774 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
3775 ccw->count = usrparm.rssd_result_len;
3776 ccw->flags = CCW_FLAG_SLI ;
3777 ccw->cda = (__u32)(addr_t) rssd_result;
3778
3779 rc = dasd_sleep_on(cqr);
3780 if (rc)
3781 goto out_sfree;
3782
3783 rc = -EFAULT;
3784 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
3785 rssd_result, usrparm.rssd_result_len))
3786 goto out_sfree;
3787 rc = 0;
3788
3789out_sfree:
3790 dasd_sfree_request(cqr, cqr->memdev);
3791out_free:
3792 kfree(rssd_result);
3793 kfree(psf_data);
3794out:
52898025
NH		 3795 DBF_DEV_EVENT(DBF_WARNING, device,
3796 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
3797 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 3798 return rc;
3799}
3800
1107ccfb 3801static int
8e09f215 3802dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 3803{
8e09f215
SW		 3804 struct dasd_device *device = block->base;
3805
1107ccfb
CH		 3806 switch (cmd) {
3807 case BIODASDGATTR:
3808 return dasd_eckd_get_attrib(device, argp);
3809 case BIODASDSATTR:
3810 return dasd_eckd_set_attrib(device, argp);
3811 case BIODASDPSRD:
3812 return dasd_eckd_performance(device, argp);
3813 case BIODASDRLSE:
3814 return dasd_eckd_release(device);
3815 case BIODASDRSRV:
3816 return dasd_eckd_reserve(device);
3817 case BIODASDSLCK:
3818 return dasd_eckd_steal_lock(device);
196339f1
SW		 3819 case BIODASDSNID:
3820 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 3821 case BIODASDSYMMIO:
3822 return dasd_symm_io(device, argp);
1107ccfb 3823 default:
6b79d14e 3824 return -ENOTTY;
1107ccfb
CH		 3825 }
3826}
3827
445b5b49
HH		 3828/*
3829 * Dump the range of CCWs into 'page' buffer
3830 * and return number of printed chars.
3831 */
4d284cac 3832static int
445b5b49
HH		 3833dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
3834{
3835 int len, count;
3836 char *datap;
3837
3838 len = 0;
3839 while (from <= to) {
3840 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3841 " CCW %p: %08X %08X DAT:",
3842 from, ((int *) from)[0], ((int *) from)[1]);
3843
3844 /* get pointer to data (consider IDALs) */
3845 if (from->flags & CCW_FLAG_IDA)
3846 datap = (char *) *((addr_t *) (addr_t) from->cda);
3847 else
3848 datap = (char *) ((addr_t) from->cda);
3849
3850 /* dump data (max 32 bytes) */
3851 for (count = 0; count < from->count && count < 32; count++) {
3852 if (count % 8 == 0) len += sprintf(page + len, " ");
3853 if (count % 4 == 0) len += sprintf(page + len, " ");
3854 len += sprintf(page + len, "%02x", datap[count]);
3855 }
3856 len += sprintf(page + len, "\n");
3857 from++;
3858 }
3859 return len;
3860}
3861
fc19f381 3862static void
aeec92ca
SH		 3863dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
3864 char *reason)
fc19f381
SH		 3865{
3866 u64 *sense;
a5a0061f 3867 u64 *stat;
aeec92ca
SH		 3868
3869 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 3870 stat = (u64 *) &irb->scsw;
fc19f381 3871 if (sense) {
a5a0061f
SW		 3872 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
3873 "%016llx %016llx %016llx %016llx",
3874 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 3875 sense[0], sense[1], sense[2], sense[3]);
fc19f381 3876 } else {
a5a0061f
SW		 3877 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
3878 reason, *stat, *((u32 *) (stat + 1)),
3879 "NO VALID SENSE");
fc19f381
SH		 3880 }
3881}
3882
1da177e4
LT		 3883/*
3884 * Print sense data and related channel program.
3885 * Parts are printed because printk buffer is only 1024 bytes.
3886 */
f3eb5384 3887static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 3888 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 3889{
3890 char *page;
445b5b49
HH		 3891 struct ccw1 *first, *last, *fail, *from, *to;
3892 int len, sl, sct;
1da177e4
LT		 3893
3894 page = (char *) get_zeroed_page(GFP_ATOMIC);
3895 if (page == NULL) {
fc19f381
SH		 3896 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3897 "No memory to dump sense data\n");
1da177e4
LT		 3898 return;
3899 }
445b5b49
HH		 3900 /* dump the sense data */
3901 len = sprintf(page, KERN_ERR PRINTK_HEADER
1da177e4 3902 " I/O status report for device %s:\n",
2a0217d5 3903 dev_name(&device->cdev->dev));
1da177e4 3904 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
a5a0061f
SW		 3905 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
3906 "CS:%02X RC:%d\n",
3907 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
3908 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
3909 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
3910 req ? req->intrc : 0);
1da177e4
LT		 3911 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3912 " device %s: Failing CCW: %p\n",
2a0217d5 3913 dev_name(&device->cdev->dev),
23d805b6 3914 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 3915 if (irb->esw.esw0.erw.cons) {
3916 for (sl = 0; sl < 4; sl++) {
3917 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3918 " Sense(hex) %2d-%2d:",
3919 (8 * sl), ((8 * sl) + 7));
3920
3921 for (sct = 0; sct < 8; sct++) {
3922 len += sprintf(page + len, " %02x",
3923 irb->ecw[8 * sl + sct]);
3924 }
3925 len += sprintf(page + len, "\n");
3926 }
3927
3928 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3929 /* 24 Byte Sense Data */
445b5b49
HH		 3930 sprintf(page + len, KERN_ERR PRINTK_HEADER
3931 " 24 Byte: %x MSG %x, "
3932 "%s MSGb to SYSOP\n",
3933 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3934 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 3935 } else {
3936 /* 32 Byte Sense Data */
445b5b49
HH		 3937 sprintf(page + len, KERN_ERR PRINTK_HEADER
3938 " 32 Byte: Format: %x "
3939 "Exception class %x\n",
3940 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 3941 }
3942 } else {
445b5b49
HH		 3943 sprintf(page + len, KERN_ERR PRINTK_HEADER
3944 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 3945 }
445b5b49
HH		 3946 printk("%s", page);
3947
8e09f215
SW		 3948 if (req) {
3949 /* req == NULL for unsolicited interrupts */
3950 /* dump the Channel Program (max 140 Bytes per line) */
3951 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3952 first = req->cpaddr;
3953 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3954 to = min(first + 6, last);
3955 len = sprintf(page, KERN_ERR PRINTK_HEADER
3956 " Related CP in req: %p\n", req);
3957 dasd_eckd_dump_ccw_range(first, to, page + len);
3958 printk("%s", page);
1da177e4 3959
8e09f215
SW		 3960 /* print failing CCW area (maximum 4) */
3961 /* scsw->cda is either valid or zero */
3962 len = 0;
3963 from = ++to;
23d805b6
PO		 3964 fail = (struct ccw1 *)(addr_t)
3965 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 3966 if (from < fail - 2) {
3967 from = fail - 2; /* there is a gap - print header */
3968 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3969 }
3970 to = min(fail + 1, last);
3971 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3972
3973 /* print last CCWs (maximum 2) */
3974 from = max(from, ++to);
3975 if (from < last - 1) {
3976 from = last - 1; /* there is a gap - print header */
3977 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3978 }
3979 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3980 if (len > 0)
3981 printk("%s", page);
1da177e4 3982 }
1da177e4
LT		 3983 free_page((unsigned long) page);
3984}
3985
f3eb5384
SW		 3986
3987/*
3988 * Print sense data from a tcw.
3989 */
3990static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3991 struct dasd_ccw_req *req, struct irb *irb)
3992{
3993 char *page;
3994 int len, sl, sct, residual;
f3eb5384 3995 struct tsb *tsb;
ef19298b 3996 u8 *sense, *rcq;
f3eb5384
SW		 3997
3998 page = (char *) get_zeroed_page(GFP_ATOMIC);
3999 if (page == NULL) {
fc19f381 4000 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 4001 "No memory to dump sense data");
4002 return;
4003 }
4004 /* dump the sense data */
4005 len = sprintf(page, KERN_ERR PRINTK_HEADER
4006 " I/O status report for device %s:\n",
4007 dev_name(&device->cdev->dev));
4008 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
a5a0061f
SW		 4009 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4010 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4011 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4012 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4013 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4014 irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
4015 req ? req->intrc : 0);
f3eb5384
SW		 4016 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4017 " device %s: Failing TCW: %p\n",
4018 dev_name(&device->cdev->dev),
4019 (void *) (addr_t) irb->scsw.tm.tcw);
4020
4021 tsb = NULL;
4022 sense = NULL;
a5a0061f 4023 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 4024 tsb = tcw_get_tsb(
4025 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4026
b8fde722 4027 if (tsb) {
f3eb5384
SW		 4028 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4029 " tsb->length %d\n", tsb->length);
4030 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4031 " tsb->flags %x\n", tsb->flags);
4032 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4033 " tsb->dcw_offset %d\n", tsb->dcw_offset);
4034 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4035 " tsb->count %d\n", tsb->count);
4036 residual = tsb->count - 28;
4037 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4038 " residual %d\n", residual);
4039
4040 switch (tsb->flags & 0x07) {
4041 case 1: /* tsa_iostat */
4042 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4043 " tsb->tsa.iostat.dev_time %d\n",
4044 tsb->tsa.iostat.dev_time);
4045 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4046 " tsb->tsa.iostat.def_time %d\n",
4047 tsb->tsa.iostat.def_time);
4048 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4049 " tsb->tsa.iostat.queue_time %d\n",
4050 tsb->tsa.iostat.queue_time);
4051 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4052 " tsb->tsa.iostat.dev_busy_time %d\n",
4053 tsb->tsa.iostat.dev_busy_time);
4054 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4055 " tsb->tsa.iostat.dev_act_time %d\n",
4056 tsb->tsa.iostat.dev_act_time);
4057 sense = tsb->tsa.iostat.sense;
4058 break;
4059 case 2: /* ts_ddpc */
4060 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4061 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b
SW		 4062 for (sl = 0; sl < 2; sl++) {
4063 len += sprintf(page + len,
4064 KERN_ERR PRINTK_HEADER
4065 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4066 (8 * sl), ((8 * sl) + 7));
4067 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 4068 for (sct = 0; sct < 8; sct++) {
4069 len += sprintf(page + len, " %02x",
ef19298b 4070 rcq[8 * sl + sct]);
f3eb5384
SW		 4071 }
4072 len += sprintf(page + len, "\n");
4073 }
4074 sense = tsb->tsa.ddpc.sense;
4075 break;
4076 case 3: /* tsa_intrg */
4077 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4078 " tsb->tsa.intrg.: not supportet yet \n");
4079 break;
4080 }
4081
4082 if (sense) {
4083 for (sl = 0; sl < 4; sl++) {
4084 len += sprintf(page + len,
4085 KERN_ERR PRINTK_HEADER
4086 " Sense(hex) %2d-%2d:",
4087 (8 * sl), ((8 * sl) + 7));
4088 for (sct = 0; sct < 8; sct++) {
4089 len += sprintf(page + len, " %02x",
4090 sense[8 * sl + sct]);
4091 }
4092 len += sprintf(page + len, "\n");
4093 }
4094
4095 if (sense[27] & DASD_SENSE_BIT_0) {
4096 /* 24 Byte Sense Data */
4097 sprintf(page + len, KERN_ERR PRINTK_HEADER
4098 " 24 Byte: %x MSG %x, "
4099 "%s MSGb to SYSOP\n",
4100 sense[7] >> 4, sense[7] & 0x0f,
4101 sense[1] & 0x10 ? "" : "no");
4102 } else {
4103 /* 32 Byte Sense Data */
4104 sprintf(page + len, KERN_ERR PRINTK_HEADER
4105 " 32 Byte: Format: %x "
4106 "Exception class %x\n",
4107 sense[6] & 0x0f, sense[22] >> 4);
4108 }
4109 } else {
4110 sprintf(page + len, KERN_ERR PRINTK_HEADER
4111 " SORRY - NO VALID SENSE AVAILABLE\n");
4112 }
4113 } else {
4114 sprintf(page + len, KERN_ERR PRINTK_HEADER
4115 " SORRY - NO TSB DATA AVAILABLE\n");
4116 }
4117 printk("%s", page);
4118 free_page((unsigned long) page);
4119}
4120
4121static void dasd_eckd_dump_sense(struct dasd_device *device,
4122 struct dasd_ccw_req *req, struct irb *irb)
4123{
a5a0061f 4124 if (scsw_is_tm(&irb->scsw))
f3eb5384
SW		 4125 dasd_eckd_dump_sense_tcw(device, req, irb);
4126 else
4127 dasd_eckd_dump_sense_ccw(device, req, irb);
4128}
4129
501183f2 4130static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 4131{
4132 /*
4133 * the device should be disconnected from our LCU structure
4134 * on restore we will reconnect it and reread LCU specific
4135 * information like PAV support that might have changed
4136 */
4137 dasd_alias_remove_device(device);
4138 dasd_alias_disconnect_device_from_lcu(device);
4139
4140 return 0;
4141}
4142
501183f2 4143static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122
SH		 4144{
4145 struct dasd_eckd_private *private;
6fca97a9 4146 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 4147 int rc;
d41dd122 4148 struct dasd_uid temp_uid;
a7602f6c 4149 unsigned long flags;
d41dd122 4150
d41dd122
SH		 4151 private = (struct dasd_eckd_private *) device->private;
4152
4153 /* Read Configuration Data */
4154 rc = dasd_eckd_read_conf(device);
4155 if (rc)
4156 goto out_err;
4157
2dedf0d9
SH		 4158 dasd_eckd_get_uid(device, &temp_uid);
4159 /* Generate device unique id */
4160 rc = dasd_eckd_generate_uid(device);
4161 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 4162 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 4163 dev_err(&device->cdev->dev, "The UID of the DASD has "
4164 "changed\n");
2dedf0d9 4165 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4166 if (rc)
4167 goto out_err;
d41dd122
SH		 4168
4169 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 4170 rc = dasd_alias_make_device_known_to_lcu(device);
4171 if (rc)
4172 return rc;
12d7b107 4173 dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST);
f4ac1d02
SW		 4174
4175 /* RE-Read Configuration Data */
4176 rc = dasd_eckd_read_conf(device);
4177 if (rc)
4178 goto out_err;
d41dd122
SH		 4179
4180 /* Read Feature Codes */
68d1e5f0 4181 dasd_eckd_read_features(device);
d41dd122
SH		 4182
4183 /* Read Device Characteristics */
68b781fe 4184 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 4185 &temp_rdc_data, 64);
d41dd122 4186 if (rc) {
b8ed5dd5
SH		 4187 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4188 "Read device characteristic failed, rc=%d", rc);
d41dd122
SH		 4189 goto out_err;
4190 }
a7602f6c 4191 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 4192 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 4193 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4194
4195 /* add device to alias management */
4196 dasd_alias_add_device(device);
4197
4198 return 0;
4199
4200out_err:
e6125fba 4201 return -1;
d41dd122
SH		 4202}
4203
501183f2
SH		 4204static int dasd_eckd_reload_device(struct dasd_device *device)
4205{
4206 struct dasd_eckd_private *private;
4207 int rc, old_base;
2dedf0d9
SH		 4208 char print_uid[60];
4209 struct dasd_uid uid;
4210 unsigned long flags;
501183f2
SH		 4211
4212 private = (struct dasd_eckd_private *) device->private;
2dedf0d9
SH		 4213
4214 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 4215 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 4216 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4217
501183f2
SH		 4218 /* Read Configuration Data */
4219 rc = dasd_eckd_read_conf(device);
4220 if (rc)
4221 goto out_err;
4222
2dedf0d9 4223 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 4224 if (rc)
4225 goto out_err;
501183f2
SH		 4226 /*
4227 * update unit address configuration and
4228 * add device to alias management
4229 */
4230 dasd_alias_update_add_device(device);
4231
2dedf0d9
SH		 4232 dasd_eckd_get_uid(device, &uid);
4233
4234 if (old_base != uid.base_unit_addr) {
4235 if (strlen(uid.vduit) > 0)
4236 snprintf(print_uid, sizeof(print_uid),
4237 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
4238 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 4239 else
2dedf0d9
SH		 4240 snprintf(print_uid, sizeof(print_uid),
4241 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
4242 uid.ssid, uid.base_unit_addr);
501183f2
SH		 4243
4244 dev_info(&device->cdev->dev,
4245 "An Alias device was reassigned to a new base device "
2dedf0d9 4246 "with UID: %s\n", print_uid);
501183f2
SH		 4247 }
4248 return 0;
4249
4250out_err:
4251 return -1;
4252}
4253
d41dd122 4254static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 4255 .driver = {
4256 .name = "dasd-eckd",
4257 .owner = THIS_MODULE,
4258 },
d41dd122
SH		 4259 .ids = dasd_eckd_ids,
4260 .probe = dasd_eckd_probe,
4261 .remove = dasd_generic_remove,
4262 .set_offline = dasd_generic_set_offline,
4263 .set_online = dasd_eckd_set_online,
4264 .notify = dasd_generic_notify,
a4d26c6a 4265 .path_event = dasd_generic_path_event,
4679e893 4266 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 4267 .freeze = dasd_generic_pm_freeze,
4268 .thaw = dasd_generic_restore_device,
4269 .restore = dasd_generic_restore_device,
a23ed009 4270 .uc_handler = dasd_generic_uc_handler,
de400d6b 4271 .int_class = IOINT_DAS,
d41dd122 4272};
f3eb5384 4273
1da177e4
LT		 4274/*
4275 * max_blocks is dependent on the amount of storage that is available
4276 * in the static io buffer for each device. Currently each device has
4277 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
4278 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
4279 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
4280 * addition we have one define extent ccw + 16 bytes of data and one
4281 * locate record ccw + 16 bytes of data. That makes:
4282 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
4283 * We want to fit two into the available memory so that we can immediately
4284 * start the next request if one finishes off. That makes 249.5 blocks
4285 * for one request. Give a little safety and the result is 240.
4286 */
4287static struct dasd_discipline dasd_eckd_discipline = {
4288 .owner = THIS_MODULE,
4289 .name = "ECKD",
4290 .ebcname = "ECKD",
ef19298b 4291 .max_blocks = 190,
1da177e4 4292 .check_device = dasd_eckd_check_characteristics,
8e09f215 4293 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 4294 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 4295 .verify_path = dasd_eckd_verify_path,
8e09f215
SW		 4296 .ready_to_online = dasd_eckd_ready_to_online,
4297 .online_to_ready = dasd_eckd_online_to_ready,
1da177e4
LT		 4298 .fill_geometry = dasd_eckd_fill_geometry,
4299 .start_IO = dasd_start_IO,
4300 .term_IO = dasd_term_IO,
8e09f215 4301 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 4302 .format_device = dasd_eckd_format_device,
1da177e4
LT		 4303 .erp_action = dasd_eckd_erp_action,
4304 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 4305 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 4306 .build_cp = dasd_eckd_build_alias_cp,
4307 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 4308 .dump_sense = dasd_eckd_dump_sense,
fc19f381 4309 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 4310 .fill_info = dasd_eckd_fill_info,
1107ccfb 4311 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 4312 .freeze = dasd_eckd_pm_freeze,
4313 .restore = dasd_eckd_restore_device,
501183f2 4314 .reload = dasd_eckd_reload_device,
2dedf0d9 4315 .get_uid = dasd_eckd_get_uid,
f1633031 4316 .kick_validate = dasd_eckd_kick_validate_server,
1da177e4
LT		 4317};
4318
4319static int __init
4320dasd_eckd_init(void)
4321{
736e6ea0
SO		 4322 int ret;
4323
1da177e4 4324 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 4325 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
4326 GFP_KERNEL | GFP_DMA);
4327 if (!dasd_reserve_req)
4328 return -ENOMEM;
a4d26c6a
SW		 4329 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
4330 GFP_KERNEL | GFP_DMA);
4331 if (!path_verification_worker) {
4332 kfree(dasd_reserve_req);
4333 return -ENOMEM;
4334 }
736e6ea0
SO		 4335 ret = ccw_driver_register(&dasd_eckd_driver);
4336 if (!ret)
4337 wait_for_device_probe();
a4d26c6a
SW		 4338 else {
4339 kfree(path_verification_worker);
f932bcea 4340 kfree(dasd_reserve_req);
a4d26c6a 4341 }
736e6ea0 4342 return ret;
1da177e4
LT		 4343}
4344
4345static void __exit
4346dasd_eckd_cleanup(void)
4347{
4348 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 4349 kfree(path_verification_worker);
f932bcea 4350 kfree(dasd_reserve_req);
1da177e4
LT		 4351}
4352
4353module_init(dasd_eckd_init);
4354module_exit(dasd_eckd_cleanup);
Linux kernel - Deliverables
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