projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
s390/dasd: improve speed of dasdfmt
[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
3bc9fef9
SH		 142/* head and record addresses of count_area read in analysis ccw */
143static const int count_area_head[] = { 0, 0, 0, 0, 2 };
144static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
145
1da177e4
LT		 146static inline unsigned int
147round_up_multiple(unsigned int no, unsigned int mult)
148{
149 int rem = no % mult;
150 return (rem ? no - rem + mult : no);
151}
152
153static inline unsigned int
154ceil_quot(unsigned int d1, unsigned int d2)
155{
156 return (d1 + (d2 - 1)) / d2;
157}
158
4d284cac 159static unsigned int
1da177e4
LT		 160recs_per_track(struct dasd_eckd_characteristics * rdc,
161 unsigned int kl, unsigned int dl)
162{
163 int dn, kn;
164
165 switch (rdc->dev_type) {
166 case 0x3380:
167 if (kl)
168 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
169 ceil_quot(dl + 12, 32));
170 else
171 return 1499 / (15 + ceil_quot(dl + 12, 32));
172 case 0x3390:
173 dn = ceil_quot(dl + 6, 232) + 1;
174 if (kl) {
175 kn = ceil_quot(kl + 6, 232) + 1;
176 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
177 9 + ceil_quot(dl + 6 * dn, 34));
178 } else
179 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
180 case 0x9345:
181 dn = ceil_quot(dl + 6, 232) + 1;
182 if (kl) {
183 kn = ceil_quot(kl + 6, 232) + 1;
184 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
185 ceil_quot(dl + 6 * dn, 34));
186 } else
187 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
188 }
189 return 0;
190}
191
b44b0ab3
SW		 192static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
193{
194 geo->cyl = (__u16) cyl;
195 geo->head = cyl >> 16;
196 geo->head <<= 4;
197 geo->head |= head;
198}
199
4d284cac 200static int
1da177e4
LT		 201check_XRC (struct ccw1 *de_ccw,
202 struct DE_eckd_data *data,
203 struct dasd_device *device)
204{
205 struct dasd_eckd_private *private;
d54853ef 206 int rc;
1da177e4
LT		 207
208 private = (struct dasd_eckd_private *) device->private;
d54853ef
MS		 209 if (!private->rdc_data.facilities.XRC_supported)
210 return 0;
1da177e4
LT		 211
212 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 213 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
214 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 215
d54853ef
MS		 216 rc = get_sync_clock(&data->ep_sys_time);
217 /* Ignore return code if sync clock is switched off. */
a8f6db4d 218 if (rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 219 rc = 0;
1da177e4 220
8e09f215 221 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 222 de_ccw->flags |= CCW_FLAG_SLI;
223 return rc;
224}
1da177e4 225
4d284cac 226static int
b44b0ab3
SW		 227define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
228 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4
LT		 229{
230 struct dasd_eckd_private *private;
b44b0ab3
SW		 231 u32 begcyl, endcyl;
232 u16 heads, beghead, endhead;
d54853ef 233 int rc = 0;
1da177e4
LT		 234
235 private = (struct dasd_eckd_private *) device->private;
236
237 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
238 ccw->flags = 0;
239 ccw->count = 16;
240 ccw->cda = (__u32) __pa(data);
241
8e09f215 242 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 243 switch (cmd) {
244 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
245 case DASD_ECKD_CCW_READ_RECORD_ZERO:
246 case DASD_ECKD_CCW_READ:
247 case DASD_ECKD_CCW_READ_MT:
248 case DASD_ECKD_CCW_READ_CKD:
249 case DASD_ECKD_CCW_READ_CKD_MT:
250 case DASD_ECKD_CCW_READ_KD:
251 case DASD_ECKD_CCW_READ_KD_MT:
252 case DASD_ECKD_CCW_READ_COUNT:
253 data->mask.perm = 0x1;
254 data->attributes.operation = private->attrib.operation;
255 break;
256 case DASD_ECKD_CCW_WRITE:
257 case DASD_ECKD_CCW_WRITE_MT:
258 case DASD_ECKD_CCW_WRITE_KD:
259 case DASD_ECKD_CCW_WRITE_KD_MT:
260 data->mask.perm = 0x02;
261 data->attributes.operation = private->attrib.operation;
d54853ef 262 rc = check_XRC (ccw, data, device);
1da177e4
LT		 263 break;
264 case DASD_ECKD_CCW_WRITE_CKD:
265 case DASD_ECKD_CCW_WRITE_CKD_MT:
266 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 267 rc = check_XRC (ccw, data, device);
1da177e4
LT		 268 break;
269 case DASD_ECKD_CCW_ERASE:
270 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
271 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
272 data->mask.perm = 0x3;
273 data->mask.auth = 0x1;
274 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 275 rc = check_XRC (ccw, data, device);
1da177e4
LT		 276 break;
277 default:
fc19f381
SH		 278 dev_err(&device->cdev->dev,
279 "0x%x is not a known command\n", cmd);
1da177e4
LT		 280 break;
281 }
282
283 data->attributes.mode = 0x3; /* ECKD */
284
285 if ((private->rdc_data.cu_type == 0x2105 ||
286 private->rdc_data.cu_type == 0x2107 ||
287 private->rdc_data.cu_type == 0x1750)
288 && !(private->uses_cdl && trk < 2))
289 data->ga_extended |= 0x40; /* Regular Data Format Mode */
290
b44b0ab3
SW		 291 heads = private->rdc_data.trk_per_cyl;
292 begcyl = trk / heads;
293 beghead = trk % heads;
294 endcyl = totrk / heads;
295 endhead = totrk % heads;
1da177e4
LT		 296
297 /* check for sequential prestage - enhance cylinder range */
298 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
299 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 300
b44b0ab3
SW		 301 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
302 endcyl += private->attrib.nr_cyl;
1da177e4 303 else
b44b0ab3 304 endcyl = (private->real_cyl - 1);
1da177e4
LT		 305 }
306
b44b0ab3
SW		 307 set_ch_t(&data->beg_ext, begcyl, beghead);
308 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 309 return rc;
1da177e4
LT		 310}
311
8e09f215
SW		 312static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
313 struct dasd_device *device)
314{
315 struct dasd_eckd_private *private;
316 int rc;
317
318 private = (struct dasd_eckd_private *) device->private;
319 if (!private->rdc_data.facilities.XRC_supported)
320 return 0;
321
322 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 323 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
324 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 325 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
326
f3eb5384 327 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215 328 /* Ignore return code if sync clock is switched off. */
a8f6db4d 329 if (rc == -EOPNOTSUPP || rc == -EACCES)
8e09f215
SW		 330 rc = 0;
331 return rc;
332}
333
f3eb5384
SW		 334static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
335 unsigned int rec_on_trk, int count, int cmd,
336 struct dasd_device *device, unsigned int reclen,
337 unsigned int tlf)
338{
339 struct dasd_eckd_private *private;
340 int sector;
341 int dn, d;
342
343 private = (struct dasd_eckd_private *) device->private;
344
345 memset(data, 0, sizeof(*data));
346 sector = 0;
347 if (rec_on_trk) {
348 switch (private->rdc_data.dev_type) {
349 case 0x3390:
350 dn = ceil_quot(reclen + 6, 232);
351 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
352 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
353 break;
354 case 0x3380:
355 d = 7 + ceil_quot(reclen + 12, 32);
356 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
357 break;
358 }
359 }
360 data->sector = sector;
361 /* note: meaning of count depends on the operation
362 * for record based I/O it's the number of records, but for
363 * track based I/O it's the number of tracks
364 */
365 data->count = count;
366 switch (cmd) {
367 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
368 data->operation.orientation = 0x3;
369 data->operation.operation = 0x03;
370 break;
371 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
372 data->operation.orientation = 0x3;
373 data->operation.operation = 0x16;
374 break;
375 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
376 data->operation.orientation = 0x1;
377 data->operation.operation = 0x03;
378 data->count++;
379 break;
380 case DASD_ECKD_CCW_READ_RECORD_ZERO:
381 data->operation.orientation = 0x3;
382 data->operation.operation = 0x16;
383 data->count++;
384 break;
385 case DASD_ECKD_CCW_WRITE:
386 case DASD_ECKD_CCW_WRITE_MT:
387 case DASD_ECKD_CCW_WRITE_KD:
388 case DASD_ECKD_CCW_WRITE_KD_MT:
389 data->auxiliary.length_valid = 0x1;
390 data->length = reclen;
391 data->operation.operation = 0x01;
392 break;
393 case DASD_ECKD_CCW_WRITE_CKD:
394 case DASD_ECKD_CCW_WRITE_CKD_MT:
395 data->auxiliary.length_valid = 0x1;
396 data->length = reclen;
397 data->operation.operation = 0x03;
398 break;
e4dbb0f2
SH		 399 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
400 data->operation.orientation = 0x0;
401 data->operation.operation = 0x3F;
402 data->extended_operation = 0x11;
403 data->length = 0;
404 data->extended_parameter_length = 0x02;
405 if (data->count > 8) {
406 data->extended_parameter[0] = 0xFF;
407 data->extended_parameter[1] = 0xFF;
408 data->extended_parameter[1] <<= (16 - count);
409 } else {
410 data->extended_parameter[0] = 0xFF;
411 data->extended_parameter[0] <<= (8 - count);
412 data->extended_parameter[1] = 0x00;
413 }
414 data->sector = 0xFF;
415 break;
f3eb5384
SW		 416 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
417 data->auxiliary.length_valid = 0x1;
418 data->length = reclen; /* not tlf, as one might think */
419 data->operation.operation = 0x3F;
420 data->extended_operation = 0x23;
421 break;
422 case DASD_ECKD_CCW_READ:
423 case DASD_ECKD_CCW_READ_MT:
424 case DASD_ECKD_CCW_READ_KD:
425 case DASD_ECKD_CCW_READ_KD_MT:
426 data->auxiliary.length_valid = 0x1;
427 data->length = reclen;
428 data->operation.operation = 0x06;
429 break;
430 case DASD_ECKD_CCW_READ_CKD:
431 case DASD_ECKD_CCW_READ_CKD_MT:
432 data->auxiliary.length_valid = 0x1;
433 data->length = reclen;
434 data->operation.operation = 0x16;
435 break;
436 case DASD_ECKD_CCW_READ_COUNT:
437 data->operation.operation = 0x06;
438 break;
e4dbb0f2
SH		 439 case DASD_ECKD_CCW_READ_TRACK:
440 data->operation.orientation = 0x1;
441 data->operation.operation = 0x0C;
442 data->extended_parameter_length = 0;
443 data->sector = 0xFF;
444 break;
f3eb5384
SW		 445 case DASD_ECKD_CCW_READ_TRACK_DATA:
446 data->auxiliary.length_valid = 0x1;
447 data->length = tlf;
448 data->operation.operation = 0x0C;
449 break;
450 case DASD_ECKD_CCW_ERASE:
451 data->length = reclen;
452 data->auxiliary.length_valid = 0x1;
453 data->operation.operation = 0x0b;
454 break;
455 default:
456 DBF_DEV_EVENT(DBF_ERR, device,
457 "fill LRE unknown opcode 0x%x", cmd);
458 BUG();
459 }
460 set_ch_t(&data->seek_addr,
461 trk / private->rdc_data.trk_per_cyl,
462 trk % private->rdc_data.trk_per_cyl);
463 data->search_arg.cyl = data->seek_addr.cyl;
464 data->search_arg.head = data->seek_addr.head;
465 data->search_arg.record = rec_on_trk;
466}
467
468static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
469 unsigned int trk, unsigned int totrk, int cmd,
470 struct dasd_device *basedev, struct dasd_device *startdev,
471 unsigned char format, unsigned int rec_on_trk, int count,
472 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 473{
474 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 475 struct DE_eckd_data *dedata;
476 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 477 u32 begcyl, endcyl;
478 u16 heads, beghead, endhead;
8e09f215
SW		 479 int rc = 0;
480
481 basepriv = (struct dasd_eckd_private *) basedev->private;
482 startpriv = (struct dasd_eckd_private *) startdev->private;
f3eb5384
SW		 483 dedata = &pfxdata->define_extent;
484 lredata = &pfxdata->locate_record;
8e09f215
SW		 485
486 ccw->cmd_code = DASD_ECKD_CCW_PFX;
487 ccw->flags = 0;
e4dbb0f2
SH		 488 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
489 ccw->count = sizeof(*pfxdata) + 2;
490 ccw->cda = (__u32) __pa(pfxdata);
491 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
492 } else {
493 ccw->count = sizeof(*pfxdata);
494 ccw->cda = (__u32) __pa(pfxdata);
495 memset(pfxdata, 0, sizeof(*pfxdata));
496 }
8e09f215 497
8e09f215 498 /* prefix data */
f3eb5384
SW		 499 if (format > 1) {
500 DBF_DEV_EVENT(DBF_ERR, basedev,
501 "PFX LRE unknown format 0x%x", format);
502 BUG();
503 return -EINVAL;
504 }
505 pfxdata->format = format;
4abb08c2
SW		 506 pfxdata->base_address = basepriv->ned->unit_addr;
507 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 508 pfxdata->validity.define_extent = 1;
8e09f215
SW		 509
510 /* private uid is kept up to date, conf_data may be outdated */
511 if (startpriv->uid.type != UA_BASE_DEVICE) {
512 pfxdata->validity.verify_base = 1;
513 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
514 pfxdata->validity.hyper_pav = 1;
515 }
516
517 /* define extend data (mostly)*/
518 switch (cmd) {
519 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
520 case DASD_ECKD_CCW_READ_RECORD_ZERO:
521 case DASD_ECKD_CCW_READ:
522 case DASD_ECKD_CCW_READ_MT:
523 case DASD_ECKD_CCW_READ_CKD:
524 case DASD_ECKD_CCW_READ_CKD_MT:
525 case DASD_ECKD_CCW_READ_KD:
526 case DASD_ECKD_CCW_READ_KD_MT:
527 case DASD_ECKD_CCW_READ_COUNT:
f3eb5384
SW		 528 dedata->mask.perm = 0x1;
529 dedata->attributes.operation = basepriv->attrib.operation;
530 break;
e4dbb0f2 531 case DASD_ECKD_CCW_READ_TRACK:
f3eb5384
SW		 532 case DASD_ECKD_CCW_READ_TRACK_DATA:
533 dedata->mask.perm = 0x1;
534 dedata->attributes.operation = basepriv->attrib.operation;
535 dedata->blk_size = 0;
8e09f215
SW		 536 break;
537 case DASD_ECKD_CCW_WRITE:
538 case DASD_ECKD_CCW_WRITE_MT:
539 case DASD_ECKD_CCW_WRITE_KD:
540 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 541 dedata->mask.perm = 0x02;
542 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 543 rc = check_XRC_on_prefix(pfxdata, basedev);
544 break;
545 case DASD_ECKD_CCW_WRITE_CKD:
546 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 547 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 548 rc = check_XRC_on_prefix(pfxdata, basedev);
549 break;
550 case DASD_ECKD_CCW_ERASE:
551 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
552 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 553 dedata->mask.perm = 0x3;
554 dedata->mask.auth = 0x1;
555 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 556 rc = check_XRC_on_prefix(pfxdata, basedev);
557 break;
e4dbb0f2
SH		 558 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
559 dedata->mask.perm = 0x03;
560 dedata->attributes.operation = basepriv->attrib.operation;
561 dedata->blk_size = 0;
562 break;
f3eb5384
SW		 563 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
564 dedata->mask.perm = 0x02;
565 dedata->attributes.operation = basepriv->attrib.operation;
566 dedata->blk_size = blksize;
567 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 568 break;
f3eb5384
SW		 569 default:
570 DBF_DEV_EVENT(DBF_ERR, basedev,
571 "PFX LRE unknown opcode 0x%x", cmd);
572 BUG();
573 return -EINVAL;
8e09f215
SW		 574 }
575
f3eb5384 576 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 577
578 if ((basepriv->rdc_data.cu_type == 0x2105 ||
579 basepriv->rdc_data.cu_type == 0x2107 ||
580 basepriv->rdc_data.cu_type == 0x1750)
581 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 582 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 583
b44b0ab3
SW		 584 heads = basepriv->rdc_data.trk_per_cyl;
585 begcyl = trk / heads;
586 beghead = trk % heads;
587 endcyl = totrk / heads;
588 endhead = totrk % heads;
8e09f215
SW		 589
590 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 591 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
592 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 593
b44b0ab3
SW		 594 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
595 endcyl += basepriv->attrib.nr_cyl;
8e09f215 596 else
b44b0ab3 597 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 598 }
599
f3eb5384
SW		 600 set_ch_t(&dedata->beg_ext, begcyl, beghead);
601 set_ch_t(&dedata->end_ext, endcyl, endhead);
602
603 if (format == 1) {
604 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
605 basedev, blksize, tlf);
606 }
607
8e09f215
SW		 608 return rc;
609}
610
f3eb5384
SW		 611static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
612 unsigned int trk, unsigned int totrk, int cmd,
613 struct dasd_device *basedev, struct dasd_device *startdev)
614{
615 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
616 0, 0, 0, 0, 0);
617}
618
4d284cac 619static void
b44b0ab3
SW		 620locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
621 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 622 struct dasd_device * device, int reclen)
623{
624 struct dasd_eckd_private *private;
625 int sector;
626 int dn, d;
138c014d 627
1da177e4
LT		 628 private = (struct dasd_eckd_private *) device->private;
629
630 DBF_DEV_EVENT(DBF_INFO, device,
631 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
632 trk, rec_on_trk, no_rec, cmd, reclen);
633
634 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
635 ccw->flags = 0;
636 ccw->count = 16;
637 ccw->cda = (__u32) __pa(data);
638
8e09f215 639 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 640 sector = 0;
641 if (rec_on_trk) {
642 switch (private->rdc_data.dev_type) {
643 case 0x3390:
644 dn = ceil_quot(reclen + 6, 232);
645 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
646 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
647 break;
648 case 0x3380:
649 d = 7 + ceil_quot(reclen + 12, 32);
650 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
651 break;
652 }
653 }
654 data->sector = sector;
655 data->count = no_rec;
656 switch (cmd) {
657 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
658 data->operation.orientation = 0x3;
659 data->operation.operation = 0x03;
660 break;
661 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
662 data->operation.orientation = 0x3;
663 data->operation.operation = 0x16;
664 break;
665 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
666 data->operation.orientation = 0x1;
667 data->operation.operation = 0x03;
668 data->count++;
669 break;
670 case DASD_ECKD_CCW_READ_RECORD_ZERO:
671 data->operation.orientation = 0x3;
672 data->operation.operation = 0x16;
673 data->count++;
674 break;
675 case DASD_ECKD_CCW_WRITE:
676 case DASD_ECKD_CCW_WRITE_MT:
677 case DASD_ECKD_CCW_WRITE_KD:
678 case DASD_ECKD_CCW_WRITE_KD_MT:
679 data->auxiliary.last_bytes_used = 0x1;
680 data->length = reclen;
681 data->operation.operation = 0x01;
682 break;
683 case DASD_ECKD_CCW_WRITE_CKD:
684 case DASD_ECKD_CCW_WRITE_CKD_MT:
685 data->auxiliary.last_bytes_used = 0x1;
686 data->length = reclen;
687 data->operation.operation = 0x03;
688 break;
689 case DASD_ECKD_CCW_READ:
690 case DASD_ECKD_CCW_READ_MT:
691 case DASD_ECKD_CCW_READ_KD:
692 case DASD_ECKD_CCW_READ_KD_MT:
693 data->auxiliary.last_bytes_used = 0x1;
694 data->length = reclen;
695 data->operation.operation = 0x06;
696 break;
697 case DASD_ECKD_CCW_READ_CKD:
698 case DASD_ECKD_CCW_READ_CKD_MT:
699 data->auxiliary.last_bytes_used = 0x1;
700 data->length = reclen;
701 data->operation.operation = 0x16;
702 break;
703 case DASD_ECKD_CCW_READ_COUNT:
704 data->operation.operation = 0x06;
705 break;
706 case DASD_ECKD_CCW_ERASE:
707 data->length = reclen;
708 data->auxiliary.last_bytes_used = 0x1;
709 data->operation.operation = 0x0b;
710 break;
711 default:
fc19f381
SH		 712 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
713 "opcode 0x%x", cmd);
1da177e4 714 }
b44b0ab3
SW		 715 set_ch_t(&data->seek_addr,
716 trk / private->rdc_data.trk_per_cyl,
717 trk % private->rdc_data.trk_per_cyl);
718 data->search_arg.cyl = data->seek_addr.cyl;
719 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 720 data->search_arg.record = rec_on_trk;
721}
722
723/*
724 * Returns 1 if the block is one of the special blocks that needs
725 * to get read/written with the KD variant of the command.
726 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
727 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
728 * Luckily the KD variants differ only by one bit (0x08) from the
729 * normal variant. So don't wonder about code like:
730 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
731 * ccw->cmd_code |= 0x8;
732 */
733static inline int
734dasd_eckd_cdl_special(int blk_per_trk, int recid)
735{
736 if (recid < 3)
737 return 1;
738 if (recid < blk_per_trk)
739 return 0;
740 if (recid < 2 * blk_per_trk)
741 return 1;
742 return 0;
743}
744
745/*
746 * Returns the record size for the special blocks of the cdl format.
747 * Only returns something useful if dasd_eckd_cdl_special is true
748 * for the recid.
749 */
750static inline int
751dasd_eckd_cdl_reclen(int recid)
752{
753 if (recid < 3)
754 return sizes_trk0[recid];
755 return LABEL_SIZE;
756}
b206181d
SH		 757/* create unique id from private structure. */
758static void create_uid(struct dasd_eckd_private *private)
3d052595 759{
4abb08c2 760 int count;
b206181d 761 struct dasd_uid *uid;
3d052595 762
2dedf0d9 763 uid = &private->uid;
3d052595 764 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 765 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 766 sizeof(uid->vendor) - 1);
3d052595 767 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 768 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 769 sizeof(uid->serial) - 1);
3d052595 770 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 771 uid->ssid = private->gneq->subsystemID;
a419aef8 772 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 773 if (private->sneq) {
774 uid->type = private->sneq->sua_flags;
8e09f215 775 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 776 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 777 } else {
778 uid->type = UA_BASE_DEVICE;
779 }
4abb08c2
SW		 780 if (private->vdsneq) {
781 for (count = 0; count < 16; count++) {
782 sprintf(uid->vduit+2*count, "%02x",
783 private->vdsneq->uit[count]);
784 }
785 }
b206181d
SH		 786}
787
788/*
789 * Generate device unique id that specifies the physical device.
790 */
791static int dasd_eckd_generate_uid(struct dasd_device *device)
792{
793 struct dasd_eckd_private *private;
794 unsigned long flags;
795
796 private = (struct dasd_eckd_private *) device->private;
797 if (!private)
798 return -ENODEV;
799 if (!private->ned || !private->gneq)
800 return -ENODEV;
801 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
802 create_uid(private);
2dedf0d9 803 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 804 return 0;
805}
806
2dedf0d9
SH		 807static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
808{
809 struct dasd_eckd_private *private;
810 unsigned long flags;
811
812 if (device->private) {
813 private = (struct dasd_eckd_private *)device->private;
814 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
815 *uid = private->uid;
816 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
817 return 0;
818 }
819 return -EINVAL;
820}
821
b206181d
SH		 822/*
823 * compare device UID with data of a given dasd_eckd_private structure
824 * return 0 for match
825 */
826static int dasd_eckd_compare_path_uid(struct dasd_device *device,
827 struct dasd_eckd_private *private)
828{
829 struct dasd_uid device_uid;
830
831 create_uid(private);
832 dasd_eckd_get_uid(device, &device_uid);
833
834 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
835}
836
a4d26c6a
SW		 837static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
838 struct dasd_ccw_req *cqr,
839 __u8 *rcd_buffer,
840 __u8 lpm)
17283b56 841{
17283b56 842 struct ccw1 *ccw;
a4d26c6a
SW		 843 /*
844 * buffer has to start with EBCDIC "V1.0" to show
845 * support for virtual device SNEQ
846 */
847 rcd_buffer[0] = 0xE5;
848 rcd_buffer[1] = 0xF1;
849 rcd_buffer[2] = 0x4B;
850 rcd_buffer[3] = 0xF0;
17283b56
CH		 851
852 ccw = cqr->cpaddr;
a4d26c6a
SW		 853 ccw->cmd_code = DASD_ECKD_CCW_RCD;
854 ccw->flags = 0;
17283b56 855 ccw->cda = (__u32)(addr_t)rcd_buffer;
a4d26c6a
SW		 856 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
857 cqr->magic = DASD_ECKD_MAGIC;
17283b56 858
8e09f215
SW		 859 cqr->startdev = device;
860 cqr->memdev = device;
861 cqr->block = NULL;
17283b56
CH		 862 cqr->expires = 10*HZ;
863 cqr->lpm = lpm;
eb6e199b 864 cqr->retries = 256;
1aae0560 865 cqr->buildclk = get_tod_clock();
17283b56 866 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 867 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
868}
869
5915a873
SH		 870/*
871 * Wakeup helper for read_conf
872 * if the cqr is not done and needs some error recovery
873 * the buffer has to be re-initialized with the EBCDIC "V1.0"
874 * to show support for virtual device SNEQ
875 */
876static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
877{
878 struct ccw1 *ccw;
879 __u8 *rcd_buffer;
880
881 if (cqr->status != DASD_CQR_DONE) {
882 ccw = cqr->cpaddr;
883 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
884 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
885
886 rcd_buffer[0] = 0xE5;
887 rcd_buffer[1] = 0xF1;
888 rcd_buffer[2] = 0x4B;
889 rcd_buffer[3] = 0xF0;
890 }
891 dasd_wakeup_cb(cqr, data);
892}
893
a4d26c6a
SW		 894static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
895 struct dasd_ccw_req *cqr,
896 __u8 *rcd_buffer,
897 __u8 lpm)
898{
899 struct ciw *ciw;
900 int rc;
901 /*
902 * sanity check: scan for RCD command in extended SenseID data
903 * some devices do not support RCD
904 */
905 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
906 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
907 return -EOPNOTSUPP;
908
909 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
910 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 911 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 912 cqr->retries = 5;
5915a873 913 cqr->callback = read_conf_cb;
a4d26c6a
SW		 914 rc = dasd_sleep_on_immediatly(cqr);
915 return rc;
17283b56
CH		 916}
917
918static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
919 void **rcd_buffer,
920 int *rcd_buffer_size, __u8 lpm)
921{
922 struct ciw *ciw;
923 char *rcd_buf = NULL;
924 int ret;
925 struct dasd_ccw_req *cqr;
926
927 /*
a4d26c6a
SW		 928 * sanity check: scan for RCD command in extended SenseID data
929 * some devices do not support RCD
17283b56
CH		 930 */
931 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 932 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 933 ret = -EOPNOTSUPP;
934 goto out_error;
935 }
a4d26c6a 936 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 937 if (!rcd_buf) {
938 ret = -ENOMEM;
939 goto out_error;
940 }
a4d26c6a
SW		 941 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
942 0, /* use rcd_buf as data ara */
943 device);
17283b56 944 if (IS_ERR(cqr)) {
a4d26c6a
SW		 945 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
946 "Could not allocate RCD request");
947 ret = -ENOMEM;
17283b56
CH		 948 goto out_error;
949 }
a4d26c6a 950 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 951 cqr->callback = read_conf_cb;
17283b56
CH		 952 ret = dasd_sleep_on(cqr);
953 /*
954 * on success we update the user input parms
955 */
8e09f215 956 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 957 if (ret)
958 goto out_error;
959
a4d26c6a 960 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 961 *rcd_buffer = rcd_buf;
962 return 0;
963out_error:
964 kfree(rcd_buf);
965 *rcd_buffer = NULL;
966 *rcd_buffer_size = 0;
967 return ret;
968}
969
4abb08c2
SW		 970static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
971{
972
973 struct dasd_sneq *sneq;
974 int i, count;
975
976 private->ned = NULL;
977 private->sneq = NULL;
978 private->vdsneq = NULL;
979 private->gneq = NULL;
980 count = private->conf_len / sizeof(struct dasd_sneq);
981 sneq = (struct dasd_sneq *)private->conf_data;
982 for (i = 0; i < count; ++i) {
983 if (sneq->flags.identifier == 1 && sneq->format == 1)
984 private->sneq = sneq;
985 else if (sneq->flags.identifier == 1 && sneq->format == 4)
986 private->vdsneq = (struct vd_sneq *)sneq;
987 else if (sneq->flags.identifier == 2)
988 private->gneq = (struct dasd_gneq *)sneq;
989 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
990 private->ned = (struct dasd_ned *)sneq;
991 sneq++;
992 }
993 if (!private->ned || !private->gneq) {
994 private->ned = NULL;
995 private->sneq = NULL;
996 private->vdsneq = NULL;
997 private->gneq = NULL;
998 return -EINVAL;
999 }
1000 return 0;
1001
1002};
1003
1004static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
1005{
1006 struct dasd_gneq *gneq;
1007 int i, count, found;
1008
1009 count = conf_len / sizeof(*gneq);
1010 gneq = (struct dasd_gneq *)conf_data;
1011 found = 0;
1012 for (i = 0; i < count; ++i) {
1013 if (gneq->flags.identifier == 2) {
1014 found = 1;
1015 break;
1016 }
1017 gneq++;
1018 }
1019 if (found)
1020 return ((char *)gneq)[18] & 0x07;
1021 else
1022 return 0;
1023}
1024
1025static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 1026{
1027 void *conf_data;
1028 int conf_len, conf_data_saved;
55d3a85c 1029 int rc, path_err;
a4d26c6a 1030 __u8 lpm, opm;
b206181d 1031 struct dasd_eckd_private *private, path_private;
a4d26c6a 1032 struct dasd_path *path_data;
b206181d
SH		 1033 struct dasd_uid *uid;
1034 char print_path_uid[60], print_device_uid[60];
1da177e4
LT		 1035
1036 private = (struct dasd_eckd_private *) device->private;
a4d26c6a
SW		 1037 path_data = &device->path_data;
1038 opm = ccw_device_get_path_mask(device->cdev);
1da177e4 1039 conf_data_saved = 0;
55d3a85c 1040 path_err = 0;
1da177e4
LT		 1041 /* get configuration data per operational path */
1042 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1043 if (!(lpm & opm))
1044 continue;
1045 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1046 &conf_len, lpm);
1047 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1048 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1049 "Read configuration data returned "
1050 "error %d", rc);
1051 return rc;
1052 }
1053 if (conf_data == NULL) {
1054 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1055 "No configuration data "
1056 "retrieved");
1057 /* no further analysis possible */
1058 path_data->opm |= lpm;
1059 continue; /* no error */
1060 }
1061 /* save first valid configuration data */
1062 if (!conf_data_saved) {
1063 kfree(private->conf_data);
1064 private->conf_data = conf_data;
1065 private->conf_len = conf_len;
1066 if (dasd_eckd_identify_conf_parts(private)) {
1067 private->conf_data = NULL;
1068 private->conf_len = 0;
1069 kfree(conf_data);
1070 continue;
1da177e4 1071 }
b206181d
SH		 1072 /*
1073 * build device UID that other path data
1074 * can be compared to it
1075 */
1076 dasd_eckd_generate_uid(device);
1077 conf_data_saved++;
1078 } else {
1079 path_private.conf_data = conf_data;
1080 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1081 if (dasd_eckd_identify_conf_parts(
1082 &path_private)) {
1083 path_private.conf_data = NULL;
1084 path_private.conf_len = 0;
1085 kfree(conf_data);
1086 continue;
1da177e4 1087 }
b206181d
SH		 1088
1089 if (dasd_eckd_compare_path_uid(
1090 device, &path_private)) {
1091 uid = &path_private.uid;
1092 if (strlen(uid->vduit) > 0)
1093 snprintf(print_path_uid,
1094 sizeof(print_path_uid),
1095 "%s.%s.%04x.%02x.%s",
1096 uid->vendor, uid->serial,
1097 uid->ssid, uid->real_unit_addr,
1098 uid->vduit);
1099 else
1100 snprintf(print_path_uid,
1101 sizeof(print_path_uid),
1102 "%s.%s.%04x.%02x",
1103 uid->vendor, uid->serial,
1104 uid->ssid,
1105 uid->real_unit_addr);
1106 uid = &private->uid;
1107 if (strlen(uid->vduit) > 0)
1108 snprintf(print_device_uid,
1109 sizeof(print_device_uid),
1110 "%s.%s.%04x.%02x.%s",
1111 uid->vendor, uid->serial,
1112 uid->ssid, uid->real_unit_addr,
1113 uid->vduit);
1114 else
1115 snprintf(print_device_uid,
1116 sizeof(print_device_uid),
1117 "%s.%s.%04x.%02x",
1118 uid->vendor, uid->serial,
1119 uid->ssid,
1120 uid->real_unit_addr);
1121 dev_err(&device->cdev->dev,
1122 "Not all channel paths lead to "
1123 "the same device, path %02X leads to "
1124 "device %s instead of %s\n", lpm,
1125 print_path_uid, print_device_uid);
55d3a85c
SH		 1126 path_err = -EINVAL;
1127 continue;
1da177e4 1128 }
b206181d
SH		 1129
1130 path_private.conf_data = NULL;
1131 path_private.conf_len = 0;
1132 }
1133 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1134 case 0x02:
1135 path_data->npm |= lpm;
1136 break;
1137 case 0x03:
1138 path_data->ppm |= lpm;
1139 break;
1da177e4 1140 }
b206181d
SH		 1141 path_data->opm |= lpm;
1142
1143 if (conf_data != private->conf_data)
1144 kfree(conf_data);
1da177e4 1145 }
b206181d 1146
55d3a85c 1147 return path_err;
1da177e4
LT		 1148}
1149
a4d26c6a
SW		 1150static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1151{
1152 struct dasd_eckd_private *private;
1153 int mdc;
1154 u32 fcx_max_data;
1155
1156 private = (struct dasd_eckd_private *) device->private;
1157 if (private->fcx_max_data) {
1158 mdc = ccw_device_get_mdc(device->cdev, lpm);
1159 if ((mdc < 0)) {
1160 dev_warn(&device->cdev->dev,
1161 "Detecting the maximum data size for zHPF "
1162 "requests failed (rc=%d) for a new path %x\n",
1163 mdc, lpm);
1164 return mdc;
1165 }
1166 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
1167 if (fcx_max_data < private->fcx_max_data) {
1168 dev_warn(&device->cdev->dev,
1169 "The maximum data size for zHPF requests %u "
1170 "on a new path %x is below the active maximum "
1171 "%u\n", fcx_max_data, lpm,
1172 private->fcx_max_data);
1173 return -EACCES;
1174 }
1175 }
1176 return 0;
1177}
1178
b206181d
SH		 1179static int rebuild_device_uid(struct dasd_device *device,
1180 struct path_verification_work_data *data)
1181{
1182 struct dasd_eckd_private *private;
1183 struct dasd_path *path_data;
1184 __u8 lpm, opm;
1185 int rc;
1186
1187 rc = -ENODEV;
1188 private = (struct dasd_eckd_private *) device->private;
1189 path_data = &device->path_data;
1190 opm = device->path_data.opm;
1191
1192 for (lpm = 0x80; lpm; lpm >>= 1) {
1193 if (!(lpm & opm))
1194 continue;
1195 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1196 memset(&data->cqr, 0, sizeof(data->cqr));
1197 data->cqr.cpaddr = &data->ccw;
1198 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1199 data->rcd_buffer,
1200 lpm);
1201
1202 if (rc) {
1203 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1204 continue;
1205 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1206 "Read configuration data "
1207 "returned error %d", rc);
1208 break;
1209 }
1210 memcpy(private->conf_data, data->rcd_buffer,
1211 DASD_ECKD_RCD_DATA_SIZE);
1212 if (dasd_eckd_identify_conf_parts(private)) {
1213 rc = -ENODEV;
1214 } else /* first valid path is enough */
1215 break;
1216 }
1217
1218 if (!rc)
1219 rc = dasd_eckd_generate_uid(device);
1220
1221 return rc;
1222}
1223
a4d26c6a
SW		 1224static void do_path_verification_work(struct work_struct *work)
1225{
1226 struct path_verification_work_data *data;
1227 struct dasd_device *device;
b206181d
SH		 1228 struct dasd_eckd_private path_private;
1229 struct dasd_uid *uid;
1230 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
a4d26c6a
SW		 1231 __u8 lpm, opm, npm, ppm, epm;
1232 unsigned long flags;
b206181d 1233 char print_uid[60];
a4d26c6a
SW		 1234 int rc;
1235
1236 data = container_of(work, struct path_verification_work_data, worker);
1237 device = data->device;
1238
c8d1c0ff
SH		 1239 /* delay path verification until device was resumed */
1240 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1241 schedule_work(work);
1242 return;
1243 }
1244
a4d26c6a
SW		 1245 opm = 0;
1246 npm = 0;
1247 ppm = 0;
1248 epm = 0;
1249 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1250 if (!(lpm & data->tbvpm))
1251 continue;
1252 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1253 memset(&data->cqr, 0, sizeof(data->cqr));
1254 data->cqr.cpaddr = &data->ccw;
1255 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1256 data->rcd_buffer,
1257 lpm);
1258 if (!rc) {
1259 switch (dasd_eckd_path_access(data->rcd_buffer,
1260 DASD_ECKD_RCD_DATA_SIZE)
1261 ) {
1262 case 0x02:
1263 npm |= lpm;
1264 break;
1265 case 0x03:
1266 ppm |= lpm;
1267 break;
1268 }
1269 opm |= lpm;
1270 } else if (rc == -EOPNOTSUPP) {
1271 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1272 "path verification: No configuration "
1273 "data retrieved");
1274 opm |= lpm;
1275 } else if (rc == -EAGAIN) {
1276 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1277 "path verification: device is stopped,"
1278 " try again later");
b206181d
SH		 1279 epm |= lpm;
1280 } else {
1281 dev_warn(&device->cdev->dev,
1282 "Reading device feature codes failed "
1283 "(rc=%d) for new path %x\n", rc, lpm);
1284 continue;
1285 }
1286 if (verify_fcx_max_data(device, lpm)) {
1287 opm &= ~lpm;
1288 npm &= ~lpm;
1289 ppm &= ~lpm;
1290 continue;
1291 }
1292
1293 /*
1294 * save conf_data for comparison after
1295 * rebuild_device_uid may have changed
1296 * the original data
1297 */
1298 memcpy(&path_rcd_buf, data->rcd_buffer,
1299 DASD_ECKD_RCD_DATA_SIZE);
1300 path_private.conf_data = (void *) &path_rcd_buf;
1301 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1302 if (dasd_eckd_identify_conf_parts(&path_private)) {
1303 path_private.conf_data = NULL;
1304 path_private.conf_len = 0;
1305 continue;
1306 }
1307
1308 /*
1309 * compare path UID with device UID only if at least
1310 * one valid path is left
1311 * in other case the device UID may have changed and
1312 * the first working path UID will be used as device UID
1313 */
1314 if (device->path_data.opm &&
1315 dasd_eckd_compare_path_uid(device, &path_private)) {
1316 /*
1317 * the comparison was not successful
1318 * rebuild the device UID with at least one
1319 * known path in case a z/VM hyperswap command
1320 * has changed the device
1321 *
1322 * after this compare again
1323 *
1324 * if either the rebuild or the recompare fails
1325 * the path can not be used
1326 */
1327 if (rebuild_device_uid(device, data) ||
1328 dasd_eckd_compare_path_uid(
1329 device, &path_private)) {
1330 uid = &path_private.uid;
1331 if (strlen(uid->vduit) > 0)
1332 snprintf(print_uid, sizeof(print_uid),
1333 "%s.%s.%04x.%02x.%s",
1334 uid->vendor, uid->serial,
1335 uid->ssid, uid->real_unit_addr,
1336 uid->vduit);
1337 else
1338 snprintf(print_uid, sizeof(print_uid),
1339 "%s.%s.%04x.%02x",
1340 uid->vendor, uid->serial,
1341 uid->ssid,
1342 uid->real_unit_addr);
1343 dev_err(&device->cdev->dev,
1344 "The newly added channel path %02X "
1345 "will not be used because it leads "
1346 "to a different device %s\n",
1347 lpm, print_uid);
a4d26c6a
SW		 1348 opm &= ~lpm;
1349 npm &= ~lpm;
1350 ppm &= ~lpm;
b206181d 1351 continue;
a4d26c6a
SW		 1352 }
1353 }
b206181d
SH		 1354
1355 /*
1356 * There is a small chance that a path is lost again between
1357 * above path verification and the following modification of
1358 * the device opm mask. We could avoid that race here by using
1359 * yet another path mask, but we rather deal with this unlikely
1360 * situation in dasd_start_IO.
1361 */
1362 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1363 if (!device->path_data.opm && opm) {
1364 device->path_data.opm = opm;
1365 dasd_generic_path_operational(device);
1366 } else
1367 device->path_data.opm |= opm;
1368 device->path_data.npm |= npm;
1369 device->path_data.ppm |= ppm;
1370 device->path_data.tbvpm |= epm;
1371 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1372 }
a4d26c6a
SW		 1373
1374 dasd_put_device(device);
1375 if (data->isglobal)
1376 mutex_unlock(&dasd_path_verification_mutex);
1377 else
1378 kfree(data);
1379}
1380
1381static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1382{
1383 struct path_verification_work_data *data;
1384
1385 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1386 if (!data) {
1387 if (mutex_trylock(&dasd_path_verification_mutex)) {
1388 data = path_verification_worker;
1389 data->isglobal = 1;
1390 } else
1391 return -ENOMEM;
1392 } else {
1393 memset(data, 0, sizeof(*data));
1394 data->isglobal = 0;
1395 }
1396 INIT_WORK(&data->worker, do_path_verification_work);
1397 dasd_get_device(device);
1398 data->device = device;
1399 data->tbvpm = lpm;
1400 schedule_work(&data->worker);
1401 return 0;
1402}
1403
8e09f215
SW		 1404static int dasd_eckd_read_features(struct dasd_device *device)
1405{
1406 struct dasd_psf_prssd_data *prssdp;
1407 struct dasd_rssd_features *features;
1408 struct dasd_ccw_req *cqr;
1409 struct ccw1 *ccw;
1410 int rc;
1411 struct dasd_eckd_private *private;
1412
1413 private = (struct dasd_eckd_private *) device->private;
68d1e5f0 1414 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1415 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1416 (sizeof(struct dasd_psf_prssd_data) +
1417 sizeof(struct dasd_rssd_features)),
1418 device);
1419 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1420 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1421 "allocate initialization request");
8e09f215
SW		 1422 return PTR_ERR(cqr);
1423 }
1424 cqr->startdev = device;
1425 cqr->memdev = device;
1426 cqr->block = NULL;
eb6e199b 1427 cqr->retries = 256;
8e09f215
SW		 1428 cqr->expires = 10 * HZ;
1429
1430 /* Prepare for Read Subsystem Data */
1431 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1432 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1433 prssdp->order = PSF_ORDER_PRSSD;
1434 prssdp->suborder = 0x41; /* Read Feature Codes */
1435 /* all other bytes of prssdp must be zero */
1436
1437 ccw = cqr->cpaddr;
1438 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1439 ccw->count = sizeof(struct dasd_psf_prssd_data);
1440 ccw->flags |= CCW_FLAG_CC;
1441 ccw->cda = (__u32)(addr_t) prssdp;
1442
1443 /* Read Subsystem Data - feature codes */
1444 features = (struct dasd_rssd_features *) (prssdp + 1);
1445 memset(features, 0, sizeof(struct dasd_rssd_features));
1446
1447 ccw++;
1448 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1449 ccw->count = sizeof(struct dasd_rssd_features);
1450 ccw->cda = (__u32)(addr_t) features;
1451
1aae0560 1452 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1453 cqr->status = DASD_CQR_FILLED;
1454 rc = dasd_sleep_on(cqr);
1455 if (rc == 0) {
1456 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1457 features = (struct dasd_rssd_features *) (prssdp + 1);
1458 memcpy(&private->features, features,
1459 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1460 } else
1461 dev_warn(&device->cdev->dev, "Reading device feature codes"
1462 " failed with rc=%d\n", rc);
8e09f215
SW		 1463 dasd_sfree_request(cqr, cqr->memdev);
1464 return rc;
1465}
1466
1467
40545573
HH		 1468/*
1469 * Build CP for Perform Subsystem Function - SSC.
1470 */
f3eb5384
SW		 1471static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1472 int enable_pav)
40545573 1473{
8e09f215
SW		 1474 struct dasd_ccw_req *cqr;
1475 struct dasd_psf_ssc_data *psf_ssc_data;
1476 struct ccw1 *ccw;
40545573 1477
68b781fe 1478 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1479 sizeof(struct dasd_psf_ssc_data),
1480 device);
1481
8e09f215 1482 if (IS_ERR(cqr)) {
fc19f381 1483 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1484 "Could not allocate PSF-SSC request");
8e09f215
SW		 1485 return cqr;
1486 }
1487 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1488 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1489 psf_ssc_data->suborder = 0xc0;
f3eb5384 1490 if (enable_pav) {
626350b6 1491 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1492 psf_ssc_data->reserved[0] = 0x88;
1493 }
8e09f215
SW		 1494 ccw = cqr->cpaddr;
1495 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1496 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1497 ccw->count = 66;
1498
1499 cqr->startdev = device;
1500 cqr->memdev = device;
1501 cqr->block = NULL;
eb6e199b 1502 cqr->retries = 256;
8e09f215 1503 cqr->expires = 10*HZ;
1aae0560 1504 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1505 cqr->status = DASD_CQR_FILLED;
1506 return cqr;
40545573
HH		 1507}
1508
1509/*
1510 * Perform Subsystem Function.
1511 * It is necessary to trigger CIO for channel revalidation since this
1512 * call might change behaviour of DASD devices.
1513 */
1514static int
12d7b107
SH		 1515dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1516 unsigned long flags)
40545573 1517{
8e09f215
SW		 1518 struct dasd_ccw_req *cqr;
1519 int rc;
1520
f3eb5384 1521 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1522 if (IS_ERR(cqr))
1523 return PTR_ERR(cqr);
1524
12d7b107
SH		 1525 /*
1526 * set flags e.g. turn on failfast, to prevent blocking
1527 * the calling function should handle failed requests
1528 */
1529 cqr->flags |= flags;
1530
8e09f215
SW		 1531 rc = dasd_sleep_on(cqr);
1532 if (!rc)
1533 /* trigger CIO to reprobe devices */
1534 css_schedule_reprobe();
12d7b107
SH		 1535 else if (cqr->intrc == -EAGAIN)
1536 rc = -EAGAIN;
1537
8e09f215
SW		 1538 dasd_sfree_request(cqr, cqr->memdev);
1539 return rc;
40545573
HH		 1540}
1541
1542/*
1543 * Valide storage server of current device.
1544 */
12d7b107
SH		 1545static int dasd_eckd_validate_server(struct dasd_device *device,
1546 unsigned long flags)
40545573
HH		 1547{
1548 int rc;
8e09f215 1549 struct dasd_eckd_private *private;
f3eb5384 1550 int enable_pav;
40545573 1551
f9f8d02f
SH		 1552 private = (struct dasd_eckd_private *) device->private;
1553 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1554 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1555 return 0;
40545573 1556 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1557 enable_pav = 0;
1558 else
1559 enable_pav = 1;
12d7b107 1560 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1561
8e79a441
HH		 1562 /* may be requested feature is not available on server,
1563 * therefore just report error and go ahead */
b8ed5dd5
SH		 1564 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1565 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1566 return rc;
40545573
HH		 1567}
1568
f1633031
SH		 1569/*
1570 * worker to do a validate server in case of a lost pathgroup
1571 */
1572static void dasd_eckd_do_validate_server(struct work_struct *work)
1573{
1574 struct dasd_device *device = container_of(work, struct dasd_device,
1575 kick_validate);
ea4da6ea
SH		 1576 unsigned long flags = 0;
1577
1578 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1579 if (dasd_eckd_validate_server(device, flags)
12d7b107
SH		 1580 == -EAGAIN) {
1581 /* schedule worker again if failed */
1582 schedule_work(&device->kick_validate);
1583 return;
1584 }
1585
f1633031
SH		 1586 dasd_put_device(device);
1587}
1588
1589static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1590{
1591 dasd_get_device(device);
25e2cf1c
SH		 1592 /* exit if device not online or in offline processing */
1593 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1594 device->state < DASD_STATE_ONLINE) {
1595 dasd_put_device(device);
1596 return;
1597 }
f1633031
SH		 1598 /* queue call to do_validate_server to the kernel event daemon. */
1599 schedule_work(&device->kick_validate);
1600}
1601
ef19298b
SW		 1602static u32 get_fcx_max_data(struct dasd_device *device)
1603{
1604#if defined(CONFIG_64BIT)
1605 int tpm, mdc;
1606 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1607 struct dasd_eckd_private *private;
1608
1609 if (dasd_nofcx)
1610 return 0;
1611 /* is transport mode supported? */
1612 private = (struct dasd_eckd_private *) device->private;
1613 fcx_in_css = css_general_characteristics.fcx;
1614 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1615 fcx_in_features = private->features.feature[40] & 0x80;
1616 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1617
1618 if (!tpm)
1619 return 0;
1620
1621 mdc = ccw_device_get_mdc(device->cdev, 0);
1622 if (mdc < 0) {
1623 dev_warn(&device->cdev->dev, "Detecting the maximum supported"
1624 " data size for zHPF requests failed\n");
1625 return 0;
1626 } else
1627 return mdc * FCX_MAX_DATA_FACTOR;
1628#else
1629 return 0;
1630#endif
1631}
1632
3d052595
HH		 1633/*
1634 * Check device characteristics.
1635 * If the device is accessible using ECKD discipline, the device is enabled.
1636 */
1da177e4
LT		 1637static int
1638dasd_eckd_check_characteristics(struct dasd_device *device)
1639{
1640 struct dasd_eckd_private *private;
8e09f215 1641 struct dasd_block *block;
2dedf0d9 1642 struct dasd_uid temp_uid;
f9f8d02f 1643 int rc, i;
33b62a30 1644 int readonly;
7c8faa86 1645 unsigned long value;
1da177e4 1646
f1633031
SH		 1647 /* setup work queue for validate server*/
1648 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1649
454e1fa1
PO		 1650 if (!ccw_device_is_pathgroup(device->cdev)) {
1651 dev_warn(&device->cdev->dev,
1652 "A channel path group could not be established\n");
1653 return -EIO;
1654 }
1655 if (!ccw_device_is_multipath(device->cdev)) {
1656 dev_info(&device->cdev->dev,
1657 "The DASD is not operating in multipath mode\n");
1658 }
1da177e4 1659 private = (struct dasd_eckd_private *) device->private;
92636b15
SO		 1660 if (!private) {
1661 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1662 if (!private) {
fc19f381
SH		 1663 dev_warn(&device->cdev->dev,
1664 "Allocating memory for private DASD data "
1665 "failed\n");
1da177e4
LT		 1666 return -ENOMEM;
1667 }
1da177e4 1668 device->private = (void *) private;
92636b15
SO		 1669 } else {
1670 memset(private, 0, sizeof(*private));
1da177e4
LT		 1671 }
1672 /* Invalidate status of initial analysis. */
1673 private->init_cqr_status = -1;
1674 /* Set default cache operations. */
1675 private->attrib.operation = DASD_NORMAL_CACHE;
1676 private->attrib.nr_cyl = 0;
1677
40545573
HH		 1678 /* Read Configuration Data */
1679 rc = dasd_eckd_read_conf(device);
1680 if (rc)
8e09f215 1681 goto out_err1;
40545573 1682
7c8faa86
SH		 1683 /* set default timeout */
1684 device->default_expires = DASD_EXPIRES;
1685 if (private->gneq) {
1686 value = 1;
1687 for (i = 0; i < private->gneq->timeout.value; i++)
1688 value = 10 * value;
1689 value = value * private->gneq->timeout.number;
1690 /* do not accept useless values */
1691 if (value != 0 && value <= DASD_EXPIRES_MAX)
1692 device->default_expires = value;
1693 }
1694
2dedf0d9
SH		 1695 dasd_eckd_get_uid(device, &temp_uid);
1696 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1697 block = dasd_alloc_block();
1698 if (IS_ERR(block)) {
b8ed5dd5
SH		 1699 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1700 "could not allocate dasd "
1701 "block structure");
8e09f215
SW		 1702 rc = PTR_ERR(block);
1703 goto out_err1;
1704 }
1705 device->block = block;
1706 block->base = device;
1707 }
1708
f9f8d02f
SH		 1709 /* register lcu with alias handling, enable PAV */
1710 rc = dasd_alias_make_device_known_to_lcu(device);
1711 if (rc)
8e09f215 1712 goto out_err2;
f9f8d02f 1713
12d7b107 1714 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 1715
1716 /* device may report different configuration data after LCU setup */
1717 rc = dasd_eckd_read_conf(device);
1718 if (rc)
1719 goto out_err3;
8e09f215
SW		 1720
1721 /* Read Feature Codes */
68d1e5f0 1722 dasd_eckd_read_features(device);
40545573 1723
1da177e4 1724 /* Read Device Characteristics */
68b781fe
SH		 1725 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1726 &private->rdc_data, 64);
8e09f215 1727 if (rc) {
b8ed5dd5
SH		 1728 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1729 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1730 goto out_err3;
1731 }
34cd551a
SH		 1732
1733 if ((device->features & DASD_FEATURE_USERAW) &&
1734 !(private->rdc_data.facilities.RT_in_LR)) {
1735 dev_err(&device->cdev->dev, "The storage server does not "
1736 "support raw-track access\n");
1737 rc = -EINVAL;
1738 goto out_err3;
1739 }
1740
817f2c84 1741 /* find the valid cylinder size */
b44b0ab3
SW		 1742 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1743 private->rdc_data.long_no_cyl)
1744 private->real_cyl = private->rdc_data.long_no_cyl;
1745 else
1746 private->real_cyl = private->rdc_data.no_cyl;
1747
ef19298b
SW		 1748 private->fcx_max_data = get_fcx_max_data(device);
1749
33b62a30
SW		 1750 readonly = dasd_device_is_ro(device);
1751 if (readonly)
1752 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1753
fc19f381 1754 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1755 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1756 private->rdc_data.dev_type,
1757 private->rdc_data.dev_model,
1758 private->rdc_data.cu_type,
1759 private->rdc_data.cu_model.model,
92636b15 1760 private->real_cyl,
fc19f381 1761 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1762 private->rdc_data.sec_per_trk,
1763 readonly ? ", read-only device" : "");
8e09f215
SW		 1764 return 0;
1765
1766out_err3:
1767 dasd_alias_disconnect_device_from_lcu(device);
1768out_err2:
1769 dasd_free_block(device->block);
1770 device->block = NULL;
1771out_err1:
4abb08c2 1772 kfree(private->conf_data);
8e09f215
SW		 1773 kfree(device->private);
1774 device->private = NULL;
3d052595 1775 return rc;
1da177e4
LT		 1776}
1777
8e09f215
SW		 1778static void dasd_eckd_uncheck_device(struct dasd_device *device)
1779{
4abb08c2
SW		 1780 struct dasd_eckd_private *private;
1781
1782 private = (struct dasd_eckd_private *) device->private;
8e09f215 1783 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1784 private->ned = NULL;
1785 private->sneq = NULL;
1786 private->vdsneq = NULL;
1787 private->gneq = NULL;
1788 private->conf_len = 0;
1789 kfree(private->conf_data);
1790 private->conf_data = NULL;
8e09f215
SW		 1791}
1792
1da177e4
LT		 1793static struct dasd_ccw_req *
1794dasd_eckd_analysis_ccw(struct dasd_device *device)
1795{
1796 struct dasd_eckd_private *private;
1797 struct eckd_count *count_data;
1798 struct LO_eckd_data *LO_data;
1799 struct dasd_ccw_req *cqr;
1800 struct ccw1 *ccw;
1801 int cplength, datasize;
1802 int i;
1803
1804 private = (struct dasd_eckd_private *) device->private;
1805
1806 cplength = 8;
1807 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1808 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1809 if (IS_ERR(cqr))
1810 return cqr;
1811 ccw = cqr->cpaddr;
1812 /* Define extent for the first 3 tracks. */
1813 define_extent(ccw++, cqr->data, 0, 2,
1814 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1815 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1816 /* Locate record for the first 4 records on track 0. */
1817 ccw[-1].flags |= CCW_FLAG_CC;
1818 locate_record(ccw++, LO_data++, 0, 0, 4,
1819 DASD_ECKD_CCW_READ_COUNT, device, 0);
1820
1821 count_data = private->count_area;
1822 for (i = 0; i < 4; i++) {
1823 ccw[-1].flags |= CCW_FLAG_CC;
1824 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1825 ccw->flags = 0;
1826 ccw->count = 8;
1827 ccw->cda = (__u32)(addr_t) count_data;
1828 ccw++;
1829 count_data++;
1830 }
1831
1832 /* Locate record for the first record on track 2. */
1833 ccw[-1].flags |= CCW_FLAG_CC;
1834 locate_record(ccw++, LO_data++, 2, 0, 1,
1835 DASD_ECKD_CCW_READ_COUNT, device, 0);
1836 /* Read count ccw. */
1837 ccw[-1].flags |= CCW_FLAG_CC;
1838 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1839 ccw->flags = 0;
1840 ccw->count = 8;
1841 ccw->cda = (__u32)(addr_t) count_data;
1842
8e09f215
SW		 1843 cqr->block = NULL;
1844 cqr->startdev = device;
1845 cqr->memdev = device;
eb6e199b 1846 cqr->retries = 255;
1aae0560 1847 cqr->buildclk = get_tod_clock();
1da177e4
LT		 1848 cqr->status = DASD_CQR_FILLED;
1849 return cqr;
1850}
1851
eb6e199b
SW		 1852/* differentiate between 'no record found' and any other error */
1853static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1854{
1855 char *sense;
1856 if (init_cqr->status == DASD_CQR_DONE)
1857 return INIT_CQR_OK;
1858 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1859 init_cqr->status == DASD_CQR_FAILED) {
1860 sense = dasd_get_sense(&init_cqr->irb);
1861 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1862 return INIT_CQR_UNFORMATTED;
1863 else
1864 return INIT_CQR_ERROR;
1865 } else
1866 return INIT_CQR_ERROR;
1867}
1868
1da177e4
LT		 1869/*
1870 * This is the callback function for the init_analysis cqr. It saves
1871 * the status of the initial analysis ccw before it frees it and kicks
1872 * the device to continue the startup sequence. This will call
1873 * dasd_eckd_do_analysis again (if the devices has not been marked
1874 * for deletion in the meantime).
1875 */
eb6e199b
SW		 1876static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1877 void *data)
1da177e4
LT		 1878{
1879 struct dasd_eckd_private *private;
1880 struct dasd_device *device;
1881
8e09f215 1882 device = init_cqr->startdev;
1da177e4 1883 private = (struct dasd_eckd_private *) device->private;
eb6e199b 1884 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1885 dasd_sfree_request(init_cqr, device);
1886 dasd_kick_device(device);
1887}
1888
eb6e199b 1889static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 1890{
1da177e4
LT		 1891 struct dasd_ccw_req *init_cqr;
1892
8e09f215 1893 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1894 if (IS_ERR(init_cqr))
1895 return PTR_ERR(init_cqr);
1896 init_cqr->callback = dasd_eckd_analysis_callback;
1897 init_cqr->callback_data = NULL;
1898 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1899 /* first try without ERP, so we can later handle unformatted
1900 * devices as special case
1901 */
1902 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1903 init_cqr->retries = 0;
1da177e4
LT		 1904 dasd_add_request_head(init_cqr);
1905 return -EAGAIN;
1906}
1907
eb6e199b 1908static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1909{
8e09f215 1910 struct dasd_device *device;
1da177e4
LT		 1911 struct dasd_eckd_private *private;
1912 struct eckd_count *count_area;
1913 unsigned int sb, blk_per_trk;
1914 int status, i;
eb6e199b 1915 struct dasd_ccw_req *init_cqr;
1da177e4 1916
8e09f215 1917 device = block->base;
1da177e4
LT		 1918 private = (struct dasd_eckd_private *) device->private;
1919 status = private->init_cqr_status;
1920 private->init_cqr_status = -1;
eb6e199b
SW		 1921 if (status == INIT_CQR_ERROR) {
1922 /* try again, this time with full ERP */
1923 init_cqr = dasd_eckd_analysis_ccw(device);
1924 dasd_sleep_on(init_cqr);
1925 status = dasd_eckd_analysis_evaluation(init_cqr);
1926 dasd_sfree_request(init_cqr, device);
1927 }
1928
e4dbb0f2
SH		 1929 if (device->features & DASD_FEATURE_USERAW) {
1930 block->bp_block = DASD_RAW_BLOCKSIZE;
1931 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1932 block->s2b_shift = 3;
1933 goto raw;
1934 }
1935
eb6e199b
SW		 1936 if (status == INIT_CQR_UNFORMATTED) {
1937 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1938 return -EMEDIUMTYPE;
eb6e199b
SW		 1939 } else if (status == INIT_CQR_ERROR) {
1940 dev_err(&device->cdev->dev,
1941 "Detecting the DASD disk layout failed because "
1942 "of an I/O error\n");
1943 return -EIO;
1da177e4
LT		 1944 }
1945
1946 private->uses_cdl = 1;
1da177e4
LT		 1947 /* Check Track 0 for Compatible Disk Layout */
1948 count_area = NULL;
1949 for (i = 0; i < 3; i++) {
1950 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 1951 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
1952 private->count_area[i].cyl != 0 ||
1953 private->count_area[i].head != count_area_head[i] ||
1954 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 1955 private->uses_cdl = 0;
1956 break;
1957 }
1958 }
1959 if (i == 3)
1960 count_area = &private->count_area[4];
1961
1962 if (private->uses_cdl == 0) {
1963 for (i = 0; i < 5; i++) {
1964 if ((private->count_area[i].kl != 0) ||
1965 (private->count_area[i].dl !=
3bc9fef9
SH		 1966 private->count_area[0].dl) ||
1967 private->count_area[i].cyl != 0 ||
1968 private->count_area[i].head != count_area_head[i] ||
1969 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 1970 break;
1971 }
1972 if (i == 5)
1973 count_area = &private->count_area[0];
1974 } else {
1975 if (private->count_area[3].record == 1)
fc19f381
SH		 1976 dev_warn(&device->cdev->dev,
1977 "Track 0 has no records following the VTOC\n");
1da177e4 1978 }
e4dbb0f2 1979
1da177e4
LT		 1980 if (count_area != NULL && count_area->kl == 0) {
1981 /* we found notthing violating our disk layout */
1982 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1983 block->bp_block = count_area->dl;
1da177e4 1984 }
8e09f215 1985 if (block->bp_block == 0) {
fc19f381
SH		 1986 dev_warn(&device->cdev->dev,
1987 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1988 return -EMEDIUMTYPE;
1989 }
8e09f215
SW		 1990 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1991 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1992 block->s2b_shift++;
1da177e4 1993
8e09f215 1994 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 1995
1996raw:
b44b0ab3 1997 block->blocks = (private->real_cyl *
1da177e4
LT		 1998 private->rdc_data.trk_per_cyl *
1999 blk_per_trk);
2000
fc19f381
SH		 2001 dev_info(&device->cdev->dev,
2002 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2003 "%s\n", (block->bp_block >> 10),
2004 ((private->real_cyl *
2005 private->rdc_data.trk_per_cyl *
2006 blk_per_trk * (block->bp_block >> 9)) >> 1),
2007 ((blk_per_trk * block->bp_block) >> 10),
2008 private->uses_cdl ?
2009 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 2010
2011 return 0;
2012}
2013
8e09f215 2014static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 2015{
2016 struct dasd_eckd_private *private;
2017
8e09f215 2018 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 2019 if (private->init_cqr_status < 0)
8e09f215 2020 return dasd_eckd_start_analysis(block);
1da177e4 2021 else
8e09f215 2022 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2023}
2024
d42e1712 2025static int dasd_eckd_basic_to_ready(struct dasd_device *device)
8e09f215
SW		 2026{
2027 return dasd_alias_add_device(device);
2028};
2029
2030static int dasd_eckd_online_to_ready(struct dasd_device *device)
2031{
501183f2 2032 cancel_work_sync(&device->reload_device);
25e2cf1c 2033 cancel_work_sync(&device->kick_validate);
d42e1712
SH		 2034 return 0;
2035};
2036
2037static int dasd_eckd_ready_to_basic(struct dasd_device *device)
2038{
8e09f215
SW		 2039 return dasd_alias_remove_device(device);
2040};
2041
1da177e4 2042static int
8e09f215 2043dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 2044{
2045 struct dasd_eckd_private *private;
2046
8e09f215
SW		 2047 private = (struct dasd_eckd_private *) block->base->private;
2048 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2049 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2050 0, block->bp_block);
1da177e4
LT		 2051 }
2052 geo->cylinders = private->rdc_data.no_cyl;
2053 geo->heads = private->rdc_data.trk_per_cyl;
2054 return 0;
2055}
2056
2057static struct dasd_ccw_req *
d42e1712
SH		 2058dasd_eckd_build_format(struct dasd_device *base,
2059 struct format_data_t *fdata)
1da177e4 2060{
d42e1712
SH		 2061 struct dasd_eckd_private *base_priv;
2062 struct dasd_eckd_private *start_priv;
2063 struct dasd_device *startdev;
1da177e4
LT		 2064 struct dasd_ccw_req *fcp;
2065 struct eckd_count *ect;
d42e1712 2066 struct ch_t address;
1da177e4
LT		 2067 struct ccw1 *ccw;
2068 void *data;
b44b0ab3 2069 int rpt;
1da177e4 2070 int cplength, datasize;
d42e1712 2071 int i, j;
f9a28f7b
JBJ		 2072 int intensity = 0;
2073 int r0_perm;
d42e1712 2074 int nr_tracks;
1da177e4 2075
d42e1712
SH		 2076 startdev = dasd_alias_get_start_dev(base);
2077 if (!startdev)
2078 startdev = base;
1da177e4 2079
d42e1712
SH		 2080 start_priv = (struct dasd_eckd_private *) startdev->private;
2081 base_priv = (struct dasd_eckd_private *) base->private;
2082
2083 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2084
2085 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
1da177e4
LT		 2086
2087 /*
2088 * fdata->intensity is a bit string that tells us what to do:
2089 * Bit 0: write record zero
2090 * Bit 1: write home address, currently not supported
2091 * Bit 2: invalidate tracks
2092 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2093 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2094 * Only some bit combinations do make sense.
2095 */
f9a28f7b
JBJ		 2096 if (fdata->intensity & 0x10) {
2097 r0_perm = 0;
2098 intensity = fdata->intensity & ~0x10;
2099 } else {
2100 r0_perm = 1;
2101 intensity = fdata->intensity;
2102 }
d42e1712 2103
f9a28f7b 2104 switch (intensity) {
1da177e4
LT		 2105 case 0x00: /* Normal format */
2106 case 0x08: /* Normal format, use cdl. */
d42e1712
SH		 2107 cplength = 2 + (rpt*nr_tracks);
2108 datasize = sizeof(struct PFX_eckd_data) +
1da177e4 2109 sizeof(struct LO_eckd_data) +
d42e1712 2110 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2111 break;
2112 case 0x01: /* Write record zero and format track. */
2113 case 0x09: /* Write record zero and format track, use cdl. */
d42e1712
SH		 2114 cplength = 2 + rpt * nr_tracks;
2115 datasize = sizeof(struct PFX_eckd_data) +
1da177e4
LT		 2116 sizeof(struct LO_eckd_data) +
2117 sizeof(struct eckd_count) +
d42e1712 2118 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2119 break;
2120 case 0x04: /* Invalidate track. */
2121 case 0x0c: /* Invalidate track, use cdl. */
2122 cplength = 3;
d42e1712 2123 datasize = sizeof(struct PFX_eckd_data) +
1da177e4
LT		 2124 sizeof(struct LO_eckd_data) +
2125 sizeof(struct eckd_count);
2126 break;
2127 default:
d42e1712
SH		 2128 dev_warn(&startdev->cdev->dev,
2129 "An I/O control call used incorrect flags 0x%x\n",
2130 fdata->intensity);
1da177e4
LT		 2131 return ERR_PTR(-EINVAL);
2132 }
2133 /* Allocate the format ccw request. */
d42e1712
SH		 2134 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
2135 datasize, startdev);
1da177e4
LT		 2136 if (IS_ERR(fcp))
2137 return fcp;
2138
d42e1712 2139 start_priv->count++;
1da177e4
LT		 2140 data = fcp->data;
2141 ccw = fcp->cpaddr;
2142
f9a28f7b 2143 switch (intensity & ~0x08) {
1da177e4 2144 case 0x00: /* Normal format. */
d42e1712
SH		 2145 prefix(ccw++, (struct PFX_eckd_data *) data,
2146 fdata->start_unit, fdata->stop_unit,
2147 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
f9a28f7b
JBJ		 2148 /* grant subsystem permission to format R0 */
2149 if (r0_perm)
d42e1712
SH		 2150 ((struct PFX_eckd_data *)data)
2151 ->define_extent.ga_extended |= 0x04;
2152 data += sizeof(struct PFX_eckd_data);
1da177e4
LT		 2153 ccw[-1].flags |= CCW_FLAG_CC;
2154 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2155 fdata->start_unit, 0, rpt*nr_tracks,
2156 DASD_ECKD_CCW_WRITE_CKD, base,
1da177e4
LT		 2157 fdata->blksize);
2158 data += sizeof(struct LO_eckd_data);
2159 break;
2160 case 0x01: /* Write record zero + format track. */
d42e1712
SH		 2161 prefix(ccw++, (struct PFX_eckd_data *) data,
2162 fdata->start_unit, fdata->stop_unit,
2163 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2164 base, startdev);
2165 data += sizeof(struct PFX_eckd_data);
1da177e4
LT		 2166 ccw[-1].flags |= CCW_FLAG_CC;
2167 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2168 fdata->start_unit, 0, rpt * nr_tracks + 1,
2169 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2170 base->block->bp_block);
1da177e4
LT		 2171 data += sizeof(struct LO_eckd_data);
2172 break;
2173 case 0x04: /* Invalidate track. */
d42e1712
SH		 2174 prefix(ccw++, (struct PFX_eckd_data *) data,
2175 fdata->start_unit, fdata->stop_unit,
2176 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2177 data += sizeof(struct PFX_eckd_data);
1da177e4
LT		 2178 ccw[-1].flags |= CCW_FLAG_CC;
2179 locate_record(ccw++, (struct LO_eckd_data *) data,
2180 fdata->start_unit, 0, 1,
d42e1712 2181 DASD_ECKD_CCW_WRITE_CKD, base, 8);
1da177e4
LT		 2182 data += sizeof(struct LO_eckd_data);
2183 break;
2184 }
d42e1712
SH		 2185
2186 for (j = 0; j < nr_tracks; j++) {
2187 /* calculate cylinder and head for the current track */
2188 set_ch_t(&address,
2189 (fdata->start_unit + j) /
2190 base_priv->rdc_data.trk_per_cyl,
2191 (fdata->start_unit + j) %
2192 base_priv->rdc_data.trk_per_cyl);
2193 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2194 ect = (struct eckd_count *) data;
2195 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2196 ect->cyl = address.cyl;
2197 ect->head = address.head;
d42e1712 2198 ect->record = 0;
1da177e4 2199 ect->kl = 0;
d42e1712 2200 ect->dl = 8;
1da177e4 2201 ccw[-1].flags |= CCW_FLAG_CC;
d42e1712 2202 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1da177e4
LT		 2203 ccw->flags = CCW_FLAG_SLI;
2204 ccw->count = 8;
2205 ccw->cda = (__u32)(addr_t) ect;
2206 ccw++;
2207 }
d42e1712
SH		 2208 if ((intensity & ~0x08) & 0x04) { /* erase track */
2209 ect = (struct eckd_count *) data;
2210 data += sizeof(struct eckd_count);
2211 ect->cyl = address.cyl;
2212 ect->head = address.head;
2213 ect->record = 1;
2214 ect->kl = 0;
2215 ect->dl = 0;
2216 ccw[-1].flags |= CCW_FLAG_CC;
2217 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2218 ccw->flags = CCW_FLAG_SLI;
2219 ccw->count = 8;
2220 ccw->cda = (__u32)(addr_t) ect;
2221 } else { /* write remaining records */
2222 for (i = 0; i < rpt; i++) {
2223 ect = (struct eckd_count *) data;
2224 data += sizeof(struct eckd_count);
2225 ect->cyl = address.cyl;
2226 ect->head = address.head;
2227 ect->record = i + 1;
2228 ect->kl = 0;
2229 ect->dl = fdata->blksize;
2230 /*
2231 * Check for special tracks 0-1
2232 * when formatting CDL
2233 */
2234 if ((intensity & 0x08) &&
2235 fdata->start_unit == 0) {
2236 if (i < 3) {
2237 ect->kl = 4;
2238 ect->dl = sizes_trk0[i] - 4;
2239 }
2240 }
2241 if ((intensity & 0x08) &&
2242 fdata->start_unit == 1) {
2243 ect->kl = 44;
2244 ect->dl = LABEL_SIZE - 44;
2245 }
2246 ccw[-1].flags |= CCW_FLAG_CC;
2247 if (i != 0 || j == 0)
2248 ccw->cmd_code =
2249 DASD_ECKD_CCW_WRITE_CKD;
2250 else
2251 ccw->cmd_code =
2252 DASD_ECKD_CCW_WRITE_CKD_MT;
2253 ccw->flags = CCW_FLAG_SLI;
2254 ccw->count = 8;
2255 ccw->cda = (__u32)(addr_t) ect;
2256 ccw++;
2257 }
2258 }
1da177e4 2259 }
d42e1712
SH		 2260
2261 fcp->startdev = startdev;
2262 fcp->memdev = startdev;
eb6e199b 2263 fcp->retries = 256;
d42e1712 2264 fcp->expires = startdev->default_expires * HZ;
1aae0560 2265 fcp->buildclk = get_tod_clock();
1da177e4 2266 fcp->status = DASD_CQR_FILLED;
d42e1712 2267
1da177e4
LT		 2268 return fcp;
2269}
2270
d42e1712
SH		 2271static int
2272dasd_eckd_format_device(struct dasd_device *base,
2273 struct format_data_t *fdata)
2274{
2275 struct dasd_ccw_req *cqr, *n;
2276 struct dasd_block *block;
2277 struct dasd_eckd_private *private;
2278 struct list_head format_queue;
2279 struct dasd_device *device;
2280 int old_stop, format_step;
2281 int step, rc = 0;
2282
2283 block = base->block;
2284 private = (struct dasd_eckd_private *) base->private;
2285
2286 /* Sanity checks. */
2287 if (fdata->start_unit >=
2288 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2289 dev_warn(&base->cdev->dev,
2290 "Start track number %u used in formatting is too big\n",
2291 fdata->start_unit);
2292 return -EINVAL;
2293 }
2294 if (fdata->stop_unit >=
2295 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2296 dev_warn(&base->cdev->dev,
2297 "Stop track number %u used in formatting is too big\n",
2298 fdata->stop_unit);
2299 return -EINVAL;
2300 }
2301 if (fdata->start_unit > fdata->stop_unit) {
2302 dev_warn(&base->cdev->dev,
2303 "Start track %u used in formatting exceeds end track\n",
2304 fdata->start_unit);
2305 return -EINVAL;
2306 }
2307 if (dasd_check_blocksize(fdata->blksize) != 0) {
2308 dev_warn(&base->cdev->dev,
2309 "The DASD cannot be formatted with block size %u\n",
2310 fdata->blksize);
2311 return -EINVAL;
2312 }
2313
2314 INIT_LIST_HEAD(&format_queue);
2315 old_stop = fdata->stop_unit;
2316
2317 while (fdata->start_unit <= 1) {
2318 fdata->stop_unit = fdata->start_unit;
2319 cqr = dasd_eckd_build_format(base, fdata);
2320 list_add(&cqr->blocklist, &format_queue);
2321
2322 fdata->stop_unit = old_stop;
2323 fdata->start_unit++;
2324
2325 if (fdata->start_unit > fdata->stop_unit)
2326 goto sleep;
2327 }
2328
2329retry:
2330 format_step = 255 / recs_per_track(&private->rdc_data, 0,
2331 fdata->blksize);
2332 while (fdata->start_unit <= old_stop) {
2333 step = fdata->stop_unit - fdata->start_unit + 1;
2334 if (step > format_step)
2335 fdata->stop_unit = fdata->start_unit + format_step - 1;
2336
2337 cqr = dasd_eckd_build_format(base, fdata);
2338 if (IS_ERR(cqr)) {
2339 if (PTR_ERR(cqr) == -ENOMEM) {
2340 /*
2341 * not enough memory available
2342 * go to out and start requests
2343 * retry after first requests were finished
2344 */
2345 fdata->stop_unit = old_stop;
2346 goto sleep;
2347 } else
2348 return PTR_ERR(cqr);
2349 }
2350 list_add(&cqr->blocklist, &format_queue);
2351
2352 fdata->start_unit = fdata->stop_unit + 1;
2353 fdata->stop_unit = old_stop;
2354 }
2355
2356sleep:
2357 dasd_sleep_on_queue(&format_queue);
2358
2359 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2360 device = cqr->startdev;
2361 private = (struct dasd_eckd_private *) device->private;
2362 if (cqr->status == DASD_CQR_FAILED)
2363 rc = -EIO;
2364 list_del_init(&cqr->blocklist);
2365 dasd_sfree_request(cqr, device);
2366 private->count--;
2367 }
2368
2369 /*
2370 * in case of ENOMEM we need to retry after
2371 * first requests are finished
2372 */
2373 if (fdata->start_unit <= fdata->stop_unit)
2374 goto retry;
2375
2376 return rc;
2377}
2378
8e09f215 2379static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 2380{
8e09f215
SW		 2381 cqr->status = DASD_CQR_FILLED;
2382 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2383 dasd_eckd_reset_ccw_to_base_io(cqr);
2384 cqr->startdev = cqr->block->base;
a4d26c6a 2385 cqr->lpm = cqr->block->base->path_data.opm;
1da177e4 2386 }
8e09f215 2387};
1da177e4
LT		 2388
2389static dasd_erp_fn_t
2390dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2391{
8e09f215 2392 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 2393 struct ccw_device *cdev = device->cdev;
2394
2395 switch (cdev->id.cu_type) {
2396 case 0x3990:
2397 case 0x2105:
2398 case 0x2107:
2399 case 0x1750:
2400 return dasd_3990_erp_action;
2401 case 0x9343:
2402 case 0x3880:
2403 default:
2404 return dasd_default_erp_action;
2405 }
2406}
2407
2408static dasd_erp_fn_t
2409dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2410{
2411 return dasd_default_erp_postaction;
2412}
2413
5a27e60d
SW		 2414static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2415 struct dasd_ccw_req *cqr,
2416 struct irb *irb)
8e09f215
SW		 2417{
2418 char mask;
f3eb5384 2419 char *sense = NULL;
501183f2 2420 struct dasd_eckd_private *private;
8e09f215 2421
501183f2 2422 private = (struct dasd_eckd_private *) device->private;
8e09f215
SW		 2423 /* first of all check for state change pending interrupt */
2424 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 2425 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 2426 /*
2427 * for alias only, not in offline processing
2428 * and only if not suspended
2429 */
501183f2 2430 if (!device->block && private->lcu &&
25e2cf1c 2431 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 2432 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2433 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 2434 /*
2435 * the state change could be caused by an alias
2436 * reassignment remove device from alias handling
2437 * to prevent new requests from being scheduled on
2438 * the wrong alias device
2439 */
2440 dasd_alias_remove_device(device);
2441
2442 /* schedule worker to reload device */
2443 dasd_reload_device(device);
2444 }
8e09f215
SW		 2445 dasd_generic_handle_state_change(device);
2446 return;
2447 }
2448
a5a0061f 2449 sense = dasd_get_sense(irb);
5a27e60d
SW		 2450 if (!sense)
2451 return;
2452
2453 /* summary unit check */
c7a29e56 2454 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 2455 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
8e09f215
SW		 2456 dasd_alias_handle_summary_unit_check(device, irb);
2457 return;
2458 }
2459
f60c768c 2460 /* service information message SIM */
5a27e60d 2461 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 2462 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2463 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 2464 return;
2465 }
2466
5a27e60d
SW		 2467 /* loss of device reservation is handled via base devices only
2468 * as alias devices may be used with several bases
2469 */
c7a29e56
SW		 2470 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
2471 (sense[7] == 0x3F) &&
5a27e60d
SW		 2472 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
2473 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
2474 if (device->features & DASD_FEATURE_FAILONSLCK)
2475 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
2476 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
2477 dev_err(&device->cdev->dev,
2478 "The device reservation was lost\n");
ada3df91 2479 }
5a27e60d 2480}
f3eb5384
SW		 2481
2482static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
2483 struct dasd_device *startdev,
8e09f215 2484 struct dasd_block *block,
f3eb5384
SW		 2485 struct request *req,
2486 sector_t first_rec,
2487 sector_t last_rec,
2488 sector_t first_trk,
2489 sector_t last_trk,
2490 unsigned int first_offs,
2491 unsigned int last_offs,
2492 unsigned int blk_per_trk,
2493 unsigned int blksize)
1da177e4
LT		 2494{
2495 struct dasd_eckd_private *private;
2496 unsigned long *idaws;
2497 struct LO_eckd_data *LO_data;
2498 struct dasd_ccw_req *cqr;
2499 struct ccw1 *ccw;
5705f702 2500 struct req_iterator iter;
1da177e4
LT		 2501 struct bio_vec *bv;
2502 char *dst;
f3eb5384 2503 unsigned int off;
1da177e4 2504 int count, cidaw, cplength, datasize;
f3eb5384 2505 sector_t recid;
1da177e4 2506 unsigned char cmd, rcmd;
8e09f215
SW		 2507 int use_prefix;
2508 struct dasd_device *basedev;
1da177e4 2509
8e09f215
SW		 2510 basedev = block->base;
2511 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 2512 if (rq_data_dir(req) == READ)
2513 cmd = DASD_ECKD_CCW_READ_MT;
2514 else if (rq_data_dir(req) == WRITE)
2515 cmd = DASD_ECKD_CCW_WRITE_MT;
2516 else
2517 return ERR_PTR(-EINVAL);
f3eb5384 2518
1da177e4
LT		 2519 /* Check struct bio and count the number of blocks for the request. */
2520 count = 0;
2521 cidaw = 0;
5705f702 2522 rq_for_each_segment(bv, req, iter) {
6c92e699
JA		 2523 if (bv->bv_len & (blksize - 1))
2524 /* Eckd can only do full blocks. */
2525 return ERR_PTR(-EINVAL);
8e09f215 2526 count += bv->bv_len >> (block->s2b_shift + 9);
347a8dc3 2527#if defined(CONFIG_64BIT)
6c92e699 2528 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
8e09f215 2529 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1da177e4 2530#endif
1da177e4
LT		 2531 }
2532 /* Paranoia. */
2533 if (count != last_rec - first_rec + 1)
2534 return ERR_PTR(-EINVAL);
8e09f215
SW		 2535
2536 /* use the prefix command if available */
2537 use_prefix = private->features.feature[8] & 0x01;
2538 if (use_prefix) {
2539 /* 1x prefix + number of blocks */
2540 cplength = 2 + count;
2541 /* 1x prefix + cidaws*sizeof(long) */
2542 datasize = sizeof(struct PFX_eckd_data) +
2543 sizeof(struct LO_eckd_data) +
2544 cidaw * sizeof(unsigned long);
2545 } else {
2546 /* 1x define extent + 1x locate record + number of blocks */
2547 cplength = 2 + count;
2548 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2549 datasize = sizeof(struct DE_eckd_data) +
2550 sizeof(struct LO_eckd_data) +
2551 cidaw * sizeof(unsigned long);
2552 }
1da177e4
LT		 2553 /* Find out the number of additional locate record ccws for cdl. */
2554 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
2555 if (last_rec >= 2*blk_per_trk)
2556 count = 2*blk_per_trk - first_rec;
2557 cplength += count;
2558 datasize += count*sizeof(struct LO_eckd_data);
2559 }
2560 /* Allocate the ccw request. */
68b781fe
SH		 2561 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2562 startdev);
1da177e4
LT		 2563 if (IS_ERR(cqr))
2564 return cqr;
2565 ccw = cqr->cpaddr;
8e09f215
SW		 2566 /* First ccw is define extent or prefix. */
2567 if (use_prefix) {
2568 if (prefix(ccw++, cqr->data, first_trk,
2569 last_trk, cmd, basedev, startdev) == -EAGAIN) {
2570 /* Clock not in sync and XRC is enabled.
2571 * Try again later.
2572 */
2573 dasd_sfree_request(cqr, startdev);
2574 return ERR_PTR(-EAGAIN);
2575 }
2576 idaws = (unsigned long *) (cqr->data +
2577 sizeof(struct PFX_eckd_data));
2578 } else {
2579 if (define_extent(ccw++, cqr->data, first_trk,
b38f27e8 2580 last_trk, cmd, basedev) == -EAGAIN) {
8e09f215
SW		 2581 /* Clock not in sync and XRC is enabled.
2582 * Try again later.
2583 */
2584 dasd_sfree_request(cqr, startdev);
2585 return ERR_PTR(-EAGAIN);
2586 }
2587 idaws = (unsigned long *) (cqr->data +
2588 sizeof(struct DE_eckd_data));
d54853ef 2589 }
1da177e4 2590 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 2591 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
2592 recid = first_rec;
2593 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
2594 /* Only standard blocks so there is just one locate record. */
2595 ccw[-1].flags |= CCW_FLAG_CC;
2596 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 2597 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 2598 }
5705f702 2599 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 2600 dst = page_address(bv->bv_page) + bv->bv_offset;
2601 if (dasd_page_cache) {
2602 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 2603 GFP_DMA | __GFP_NOWARN);
1da177e4
LT		 2604 if (copy && rq_data_dir(req) == WRITE)
2605 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
2606 if (copy)
2607 dst = copy + bv->bv_offset;
2608 }
2609 for (off = 0; off < bv->bv_len; off += blksize) {
2610 sector_t trkid = recid;
2611 unsigned int recoffs = sector_div(trkid, blk_per_trk);
2612 rcmd = cmd;
2613 count = blksize;
2614 /* Locate record for cdl special block ? */
2615 if (private->uses_cdl && recid < 2*blk_per_trk) {
2616 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
2617 rcmd |= 0x8;
2618 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 2619 if (count < blksize &&
2620 rq_data_dir(req) == READ)
1da177e4
LT		 2621 memset(dst + count, 0xe5,
2622 blksize - count);
2623 }
2624 ccw[-1].flags |= CCW_FLAG_CC;
2625 locate_record(ccw++, LO_data++,
2626 trkid, recoffs + 1,
8e09f215 2627 1, rcmd, basedev, count);
1da177e4
LT		 2628 }
2629 /* Locate record for standard blocks ? */
2630 if (private->uses_cdl && recid == 2*blk_per_trk) {
2631 ccw[-1].flags |= CCW_FLAG_CC;
2632 locate_record(ccw++, LO_data++,
2633 trkid, recoffs + 1,
2634 last_rec - recid + 1,
8e09f215 2635 cmd, basedev, count);
1da177e4
LT		 2636 }
2637 /* Read/write ccw. */
2638 ccw[-1].flags |= CCW_FLAG_CC;
2639 ccw->cmd_code = rcmd;
2640 ccw->count = count;
2641 if (idal_is_needed(dst, blksize)) {
2642 ccw->cda = (__u32)(addr_t) idaws;
2643 ccw->flags = CCW_FLAG_IDA;
2644 idaws = idal_create_words(idaws, dst, blksize);
2645 } else {
2646 ccw->cda = (__u32)(addr_t) dst;
2647 ccw->flags = 0;
2648 }
2649 ccw++;
2650 dst += blksize;
2651 recid++;
2652 }
2653 }
13de227b
HS		 2654 if (blk_noretry_request(req) ||
2655 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 2656 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 2657 cqr->startdev = startdev;
2658 cqr->memdev = startdev;
2659 cqr->block = block;
7c8faa86 2660 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2661 cqr->lpm = startdev->path_data.ppm;
1da177e4 2662 cqr->retries = 256;
1aae0560 2663 cqr->buildclk = get_tod_clock();
1da177e4
LT		 2664 cqr->status = DASD_CQR_FILLED;
2665 return cqr;
2666}
2667
f3eb5384
SW		 2668static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
2669 struct dasd_device *startdev,
2670 struct dasd_block *block,
2671 struct request *req,
2672 sector_t first_rec,
2673 sector_t last_rec,
2674 sector_t first_trk,
2675 sector_t last_trk,
2676 unsigned int first_offs,
2677 unsigned int last_offs,
2678 unsigned int blk_per_trk,
2679 unsigned int blksize)
2680{
f3eb5384
SW		 2681 unsigned long *idaws;
2682 struct dasd_ccw_req *cqr;
2683 struct ccw1 *ccw;
2684 struct req_iterator iter;
2685 struct bio_vec *bv;
2686 char *dst, *idaw_dst;
2687 unsigned int cidaw, cplength, datasize;
2688 unsigned int tlf;
2689 sector_t recid;
2690 unsigned char cmd;
2691 struct dasd_device *basedev;
2692 unsigned int trkcount, count, count_to_trk_end;
2693 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2694 unsigned char new_track, end_idaw;
2695 sector_t trkid;
2696 unsigned int recoffs;
2697
2698 basedev = block->base;
f3eb5384
SW		 2699 if (rq_data_dir(req) == READ)
2700 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2701 else if (rq_data_dir(req) == WRITE)
2702 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2703 else
2704 return ERR_PTR(-EINVAL);
2705
2706 /* Track based I/O needs IDAWs for each page, and not just for
2707 * 64 bit addresses. We need additional idals for pages
2708 * that get filled from two tracks, so we use the number
2709 * of records as upper limit.
2710 */
2711 cidaw = last_rec - first_rec + 1;
2712 trkcount = last_trk - first_trk + 1;
2713
2714 /* 1x prefix + one read/write ccw per track */
2715 cplength = 1 + trkcount;
2716
2717 /* on 31-bit we need space for two 32 bit addresses per page
2718 * on 64-bit one 64 bit address
2719 */
2720 datasize = sizeof(struct PFX_eckd_data) +
2721 cidaw * sizeof(unsigned long long);
2722
2723 /* Allocate the ccw request. */
68b781fe
SH		 2724 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2725 startdev);
f3eb5384
SW		 2726 if (IS_ERR(cqr))
2727 return cqr;
2728 ccw = cqr->cpaddr;
2729 /* transfer length factor: how many bytes to read from the last track */
2730 if (first_trk == last_trk)
2731 tlf = last_offs - first_offs + 1;
2732 else
2733 tlf = last_offs + 1;
2734 tlf *= blksize;
2735
2736 if (prefix_LRE(ccw++, cqr->data, first_trk,
2737 last_trk, cmd, basedev, startdev,
2738 1 /* format */, first_offs + 1,
2739 trkcount, blksize,
2740 tlf) == -EAGAIN) {
2741 /* Clock not in sync and XRC is enabled.
2742 * Try again later.
2743 */
2744 dasd_sfree_request(cqr, startdev);
2745 return ERR_PTR(-EAGAIN);
2746 }
2747
2748 /*
2749 * The translation of request into ccw programs must meet the
2750 * following conditions:
2751 * - all idaws but the first and the last must address full pages
2752 * (or 2K blocks on 31-bit)
2753 * - the scope of a ccw and it's idal ends with the track boundaries
2754 */
2755 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2756 recid = first_rec;
2757 new_track = 1;
2758 end_idaw = 0;
2759 len_to_track_end = 0;
246ccea1 2760 idaw_dst = NULL;
f3eb5384
SW		 2761 idaw_len = 0;
2762 rq_for_each_segment(bv, req, iter) {
2763 dst = page_address(bv->bv_page) + bv->bv_offset;
2764 seg_len = bv->bv_len;
2765 while (seg_len) {
2766 if (new_track) {
2767 trkid = recid;
2768 recoffs = sector_div(trkid, blk_per_trk);
2769 count_to_trk_end = blk_per_trk - recoffs;
2770 count = min((last_rec - recid + 1),
2771 (sector_t)count_to_trk_end);
2772 len_to_track_end = count * blksize;
2773 ccw[-1].flags |= CCW_FLAG_CC;
2774 ccw->cmd_code = cmd;
2775 ccw->count = len_to_track_end;
2776 ccw->cda = (__u32)(addr_t)idaws;
2777 ccw->flags = CCW_FLAG_IDA;
2778 ccw++;
2779 recid += count;
2780 new_track = 0;
52db45c3
SW		 2781 /* first idaw for a ccw may start anywhere */
2782 if (!idaw_dst)
2783 idaw_dst = dst;
f3eb5384 2784 }
52db45c3
SW		 2785 /* If we start a new idaw, we must make sure that it
2786 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2787 * If we continue an idaw, we must make sure that the
2788 * current segment begins where the so far accumulated
2789 * idaw ends
2790 */
52db45c3
SW		 2791 if (!idaw_dst) {
2792 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2793 dasd_sfree_request(cqr, startdev);
2794 return ERR_PTR(-ERANGE);
2795 } else
2796 idaw_dst = dst;
2797 }
f3eb5384
SW		 2798 if ((idaw_dst + idaw_len) != dst) {
2799 dasd_sfree_request(cqr, startdev);
2800 return ERR_PTR(-ERANGE);
2801 }
2802 part_len = min(seg_len, len_to_track_end);
2803 seg_len -= part_len;
2804 dst += part_len;
2805 idaw_len += part_len;
2806 len_to_track_end -= part_len;
2807 /* collected memory area ends on an IDA_BLOCK border,
2808 * -> create an idaw
2809 * idal_create_words will handle cases where idaw_len
2810 * is larger then IDA_BLOCK_SIZE
2811 */
2812 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2813 end_idaw = 1;
2814 /* We also need to end the idaw at track end */
2815 if (!len_to_track_end) {
2816 new_track = 1;
2817 end_idaw = 1;
2818 }
2819 if (end_idaw) {
2820 idaws = idal_create_words(idaws, idaw_dst,
2821 idaw_len);
246ccea1 2822 idaw_dst = NULL;
f3eb5384
SW		 2823 idaw_len = 0;
2824 end_idaw = 0;
2825 }
2826 }
2827 }
2828
2829 if (blk_noretry_request(req) ||
2830 block->base->features & DASD_FEATURE_FAILFAST)
2831 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2832 cqr->startdev = startdev;
2833 cqr->memdev = startdev;
2834 cqr->block = block;
7c8faa86 2835 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2836 cqr->lpm = startdev->path_data.ppm;
f3eb5384 2837 cqr->retries = 256;
1aae0560 2838 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 2839 cqr->status = DASD_CQR_FILLED;
2840 return cqr;
2841}
2842
2843static int prepare_itcw(struct itcw *itcw,
2844 unsigned int trk, unsigned int totrk, int cmd,
2845 struct dasd_device *basedev,
2846 struct dasd_device *startdev,
2847 unsigned int rec_on_trk, int count,
2848 unsigned int blksize,
2849 unsigned int total_data_size,
2850 unsigned int tlf,
2851 unsigned int blk_per_trk)
2852{
2853 struct PFX_eckd_data pfxdata;
2854 struct dasd_eckd_private *basepriv, *startpriv;
2855 struct DE_eckd_data *dedata;
2856 struct LRE_eckd_data *lredata;
2857 struct dcw *dcw;
2858
2859 u32 begcyl, endcyl;
2860 u16 heads, beghead, endhead;
2861 u8 pfx_cmd;
2862
2863 int rc = 0;
2864 int sector = 0;
2865 int dn, d;
2866
2867
2868 /* setup prefix data */
2869 basepriv = (struct dasd_eckd_private *) basedev->private;
2870 startpriv = (struct dasd_eckd_private *) startdev->private;
2871 dedata = &pfxdata.define_extent;
2872 lredata = &pfxdata.locate_record;
2873
2874 memset(&pfxdata, 0, sizeof(pfxdata));
2875 pfxdata.format = 1; /* PFX with LRE */
2876 pfxdata.base_address = basepriv->ned->unit_addr;
2877 pfxdata.base_lss = basepriv->ned->ID;
2878 pfxdata.validity.define_extent = 1;
2879
2880 /* private uid is kept up to date, conf_data may be outdated */
2881 if (startpriv->uid.type != UA_BASE_DEVICE) {
2882 pfxdata.validity.verify_base = 1;
2883 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2884 pfxdata.validity.hyper_pav = 1;
2885 }
2886
2887 switch (cmd) {
2888 case DASD_ECKD_CCW_READ_TRACK_DATA:
2889 dedata->mask.perm = 0x1;
2890 dedata->attributes.operation = basepriv->attrib.operation;
2891 dedata->blk_size = blksize;
2892 dedata->ga_extended |= 0x42;
2893 lredata->operation.orientation = 0x0;
2894 lredata->operation.operation = 0x0C;
2895 lredata->auxiliary.check_bytes = 0x01;
2896 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2897 break;
2898 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2899 dedata->mask.perm = 0x02;
2900 dedata->attributes.operation = basepriv->attrib.operation;
2901 dedata->blk_size = blksize;
2902 rc = check_XRC_on_prefix(&pfxdata, basedev);
2903 dedata->ga_extended |= 0x42;
2904 lredata->operation.orientation = 0x0;
2905 lredata->operation.operation = 0x3F;
2906 lredata->extended_operation = 0x23;
2907 lredata->auxiliary.check_bytes = 0x2;
2908 pfx_cmd = DASD_ECKD_CCW_PFX;
2909 break;
2910 default:
2911 DBF_DEV_EVENT(DBF_ERR, basedev,
2912 "prepare itcw, unknown opcode 0x%x", cmd);
2913 BUG();
2914 break;
2915 }
2916 if (rc)
2917 return rc;
2918
2919 dedata->attributes.mode = 0x3; /* ECKD */
2920
2921 heads = basepriv->rdc_data.trk_per_cyl;
2922 begcyl = trk / heads;
2923 beghead = trk % heads;
2924 endcyl = totrk / heads;
2925 endhead = totrk % heads;
2926
2927 /* check for sequential prestage - enhance cylinder range */
2928 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2929 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2930
2931 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2932 endcyl += basepriv->attrib.nr_cyl;
2933 else
2934 endcyl = (basepriv->real_cyl - 1);
2935 }
2936
2937 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2938 set_ch_t(&dedata->end_ext, endcyl, endhead);
2939
2940 dedata->ep_format = 0x20; /* records per track is valid */
2941 dedata->ep_rec_per_track = blk_per_trk;
2942
2943 if (rec_on_trk) {
2944 switch (basepriv->rdc_data.dev_type) {
2945 case 0x3390:
2946 dn = ceil_quot(blksize + 6, 232);
2947 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2948 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2949 break;
2950 case 0x3380:
2951 d = 7 + ceil_quot(blksize + 12, 32);
2952 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2953 break;
2954 }
2955 }
2956
2957 lredata->auxiliary.length_valid = 1;
2958 lredata->auxiliary.length_scope = 1;
2959 lredata->auxiliary.imbedded_ccw_valid = 1;
2960 lredata->length = tlf;
2961 lredata->imbedded_ccw = cmd;
2962 lredata->count = count;
2963 lredata->sector = sector;
2964 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2965 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2966 lredata->search_arg.head = lredata->seek_addr.head;
2967 lredata->search_arg.record = rec_on_trk;
2968
2969 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2970 &pfxdata, sizeof(pfxdata), total_data_size);
364c18d8 2971 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0;
f3eb5384
SW		 2972}
2973
2974static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2975 struct dasd_device *startdev,
2976 struct dasd_block *block,
2977 struct request *req,
2978 sector_t first_rec,
2979 sector_t last_rec,
2980 sector_t first_trk,
2981 sector_t last_trk,
2982 unsigned int first_offs,
2983 unsigned int last_offs,
2984 unsigned int blk_per_trk,
2985 unsigned int blksize)
2986{
f3eb5384
SW		 2987 struct dasd_ccw_req *cqr;
2988 struct req_iterator iter;
2989 struct bio_vec *bv;
2990 char *dst;
2991 unsigned int trkcount, ctidaw;
2992 unsigned char cmd;
2993 struct dasd_device *basedev;
2994 unsigned int tlf;
2995 struct itcw *itcw;
2996 struct tidaw *last_tidaw = NULL;
2997 int itcw_op;
2998 size_t itcw_size;
ef19298b
SW		 2999 u8 tidaw_flags;
3000 unsigned int seg_len, part_len, len_to_track_end;
3001 unsigned char new_track;
3002 sector_t recid, trkid;
3003 unsigned int offs;
3004 unsigned int count, count_to_trk_end;
cd10502b 3005 int ret;
f3eb5384
SW		 3006
3007 basedev = block->base;
f3eb5384
SW		 3008 if (rq_data_dir(req) == READ) {
3009 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3010 itcw_op = ITCW_OP_READ;
3011 } else if (rq_data_dir(req) == WRITE) {
3012 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3013 itcw_op = ITCW_OP_WRITE;
3014 } else
3015 return ERR_PTR(-EINVAL);
3016
3017 /* trackbased I/O needs address all memory via TIDAWs,
3018 * not just for 64 bit addresses. This allows us to map
3019 * each segment directly to one tidaw.
ef19298b
SW		 3020 * In the case of write requests, additional tidaws may
3021 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 3022 */
3023 trkcount = last_trk - first_trk + 1;
3024 ctidaw = 0;
3025 rq_for_each_segment(bv, req, iter) {
3026 ++ctidaw;
3027 }
ef19298b
SW		 3028 if (rq_data_dir(req) == WRITE)
3029 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 3030
3031 /* Allocate the ccw request. */
3032 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 3033 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 3034 if (IS_ERR(cqr))
3035 return cqr;
3036
f3eb5384
SW		 3037 /* transfer length factor: how many bytes to read from the last track */
3038 if (first_trk == last_trk)
3039 tlf = last_offs - first_offs + 1;
3040 else
3041 tlf = last_offs + 1;
3042 tlf *= blksize;
3043
3044 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 3045 if (IS_ERR(itcw)) {
cd10502b
JL		 3046 ret = -EINVAL;
3047 goto out_error;
ef19298b 3048 }
f3eb5384 3049 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 3050 if (prepare_itcw(itcw, first_trk, last_trk,
3051 cmd, basedev, startdev,
3052 first_offs + 1,
3053 trkcount, blksize,
3054 (last_rec - first_rec + 1) * blksize,
3055 tlf, blk_per_trk) == -EAGAIN) {
3056 /* Clock not in sync and XRC is enabled.
3057 * Try again later.
3058 */
cd10502b
JL		 3059 ret = -EAGAIN;
3060 goto out_error;
f3eb5384 3061 }
d54cddb6 3062 len_to_track_end = 0;
f3eb5384
SW		 3063 /*
3064 * A tidaw can address 4k of memory, but must not cross page boundaries
3065 * We can let the block layer handle this by setting
3066 * blk_queue_segment_boundary to page boundaries and
3067 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 3068 * For write requests, a TIDAW must not cross track boundaries, because
3069 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 3070 */
ef19298b
SW		 3071 if (rq_data_dir(req) == WRITE) {
3072 new_track = 1;
3073 recid = first_rec;
3074 rq_for_each_segment(bv, req, iter) {
3075 dst = page_address(bv->bv_page) + bv->bv_offset;
3076 seg_len = bv->bv_len;
3077 while (seg_len) {
3078 if (new_track) {
3079 trkid = recid;
3080 offs = sector_div(trkid, blk_per_trk);
3081 count_to_trk_end = blk_per_trk - offs;
3082 count = min((last_rec - recid + 1),
3083 (sector_t)count_to_trk_end);
3084 len_to_track_end = count * blksize;
3085 recid += count;
3086 new_track = 0;
3087 }
3088 part_len = min(seg_len, len_to_track_end);
3089 seg_len -= part_len;
3090 len_to_track_end -= part_len;
3091 /* We need to end the tidaw at track end */
3092 if (!len_to_track_end) {
3093 new_track = 1;
3094 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3095 } else
3096 tidaw_flags = 0;
3097 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3098 dst, part_len);
cd10502b
JL		 3099 if (IS_ERR(last_tidaw)) {
3100 ret = -EINVAL;
3101 goto out_error;
3102 }
ef19298b
SW		 3103 dst += part_len;
3104 }
3105 }
3106 } else {
3107 rq_for_each_segment(bv, req, iter) {
3108 dst = page_address(bv->bv_page) + bv->bv_offset;
3109 last_tidaw = itcw_add_tidaw(itcw, 0x00,
3110 dst, bv->bv_len);
cd10502b
JL		 3111 if (IS_ERR(last_tidaw)) {
3112 ret = -EINVAL;
3113 goto out_error;
3114 }
ef19298b 3115 }
f3eb5384 3116 }
ef19298b
SW		 3117 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3118 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 3119 itcw_finalize(itcw);
3120
3121 if (blk_noretry_request(req) ||
3122 block->base->features & DASD_FEATURE_FAILFAST)
3123 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 3124 cqr->cpmode = 1;
f3eb5384
SW		 3125 cqr->startdev = startdev;
3126 cqr->memdev = startdev;
3127 cqr->block = block;
7c8faa86 3128 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 3129 cqr->lpm = startdev->path_data.ppm;
f3eb5384 3130 cqr->retries = 256;
1aae0560 3131 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 3132 cqr->status = DASD_CQR_FILLED;
3133 return cqr;
cd10502b
JL		 3134out_error:
3135 dasd_sfree_request(cqr, startdev);
3136 return ERR_PTR(ret);
f3eb5384
SW		 3137}
3138
3139static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3140 struct dasd_block *block,
3141 struct request *req)
3142{
ef19298b 3143 int cmdrtd, cmdwtd;
f3eb5384 3144 int use_prefix;
ef19298b 3145 int fcx_multitrack;
45b44d76 3146 struct dasd_eckd_private *private;
f3eb5384
SW		 3147 struct dasd_device *basedev;
3148 sector_t first_rec, last_rec;
3149 sector_t first_trk, last_trk;
3150 unsigned int first_offs, last_offs;
3151 unsigned int blk_per_trk, blksize;
3152 int cdlspecial;
ef19298b 3153 unsigned int data_size;
f3eb5384
SW		 3154 struct dasd_ccw_req *cqr;
3155
3156 basedev = block->base;
3157 private = (struct dasd_eckd_private *) basedev->private;
3158
3159 /* Calculate number of blocks/records per track. */
3160 blksize = block->bp_block;
3161 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 3162 if (blk_per_trk == 0)
3163 return ERR_PTR(-EINVAL);
f3eb5384 3164 /* Calculate record id of first and last block. */
83096ebf 3165 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 3166 first_offs = sector_div(first_trk, blk_per_trk);
3167 last_rec = last_trk =
83096ebf 3168 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 3169 last_offs = sector_div(last_trk, blk_per_trk);
3170 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3171
ef19298b
SW		 3172 fcx_multitrack = private->features.feature[40] & 0x20;
3173 data_size = blk_rq_bytes(req);
3174 /* tpm write request add CBC data on each track boundary */
3175 if (rq_data_dir(req) == WRITE)
3176 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 3177
3178 /* is read track data and write track data in command mode supported? */
3179 cmdrtd = private->features.feature[9] & 0x20;
3180 cmdwtd = private->features.feature[12] & 0x40;
3181 use_prefix = private->features.feature[8] & 0x01;
3182
3183 cqr = NULL;
3184 if (cdlspecial || dasd_page_cache) {
3185 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 3186 } else if ((data_size <= private->fcx_max_data)
3187 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 3188 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3189 first_rec, last_rec,
3190 first_trk, last_trk,
3191 first_offs, last_offs,
3192 blk_per_trk, blksize);
ef19298b
SW		 3193 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3194 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3195 cqr = NULL;
3196 } else if (use_prefix &&
3197 (((rq_data_dir(req) == READ) && cmdrtd) ||
3198 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3199 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3200 first_rec, last_rec,
3201 first_trk, last_trk,
3202 first_offs, last_offs,
3203 blk_per_trk, blksize);
ef19298b
SW		 3204 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3205 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3206 cqr = NULL;
3207 }
3208 if (!cqr)
3209 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3210 first_rec, last_rec,
3211 first_trk, last_trk,
3212 first_offs, last_offs,
3213 blk_per_trk, blksize);
3214 return cqr;
3215}
3216
e4dbb0f2
SH		 3217static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
3218 struct dasd_block *block,
3219 struct request *req)
3220{
e4dbb0f2
SH		 3221 unsigned long *idaws;
3222 struct dasd_device *basedev;
3223 struct dasd_ccw_req *cqr;
3224 struct ccw1 *ccw;
3225 struct req_iterator iter;
3226 struct bio_vec *bv;
3227 char *dst;
3228 unsigned char cmd;
3229 unsigned int trkcount;
3230 unsigned int seg_len, len_to_track_end;
3231 unsigned int first_offs;
3232 unsigned int cidaw, cplength, datasize;
3233 sector_t first_trk, last_trk;
3234 unsigned int pfx_datasize;
3235
3236 /*
3237 * raw track access needs to be mutiple of 64k and on 64k boundary
3238 */
3239 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) {
3240 cqr = ERR_PTR(-EINVAL);
3241 goto out;
3242 }
3243 if (((blk_rq_pos(req) + blk_rq_sectors(req)) %
3244 DASD_RAW_SECTORS_PER_TRACK) != 0) {
3245 cqr = ERR_PTR(-EINVAL);
3246 goto out;
3247 }
3248
3249 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3250 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3251 DASD_RAW_SECTORS_PER_TRACK;
3252 trkcount = last_trk - first_trk + 1;
3253 first_offs = 0;
3254 basedev = block->base;
e4dbb0f2
SH		 3255
3256 if (rq_data_dir(req) == READ)
3257 cmd = DASD_ECKD_CCW_READ_TRACK;
3258 else if (rq_data_dir(req) == WRITE)
3259 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3260 else {
3261 cqr = ERR_PTR(-EINVAL);
3262 goto out;
3263 }
3264
3265 /*
3266 * Raw track based I/O needs IDAWs for each page,
3267 * and not just for 64 bit addresses.
3268 */
3269 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3270
3271 /* 1x prefix + one read/write ccw per track */
3272 cplength = 1 + trkcount;
3273
3274 /*
3275 * struct PFX_eckd_data has up to 2 byte as extended parameter
3276 * this is needed for write full track and has to be mentioned
25985edc 3277 * separately
e4dbb0f2
SH		 3278 * add 8 instead of 2 to keep 8 byte boundary
3279 */
3280 pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
3281
3282 datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
3283
3284 /* Allocate the ccw request. */
3285 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3286 datasize, startdev);
3287 if (IS_ERR(cqr))
3288 goto out;
3289 ccw = cqr->cpaddr;
3290
3291 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
3292 basedev, startdev, 1 /* format */, first_offs + 1,
3293 trkcount, 0, 0) == -EAGAIN) {
3294 /* Clock not in sync and XRC is enabled.
3295 * Try again later.
3296 */
3297 dasd_sfree_request(cqr, startdev);
3298 cqr = ERR_PTR(-EAGAIN);
3299 goto out;
3300 }
3301
3302 idaws = (unsigned long *)(cqr->data + pfx_datasize);
3303
3304 len_to_track_end = 0;
3305
3306 rq_for_each_segment(bv, req, iter) {
3307 dst = page_address(bv->bv_page) + bv->bv_offset;
3308 seg_len = bv->bv_len;
3309 if (!len_to_track_end) {
3310 ccw[-1].flags |= CCW_FLAG_CC;
3311 ccw->cmd_code = cmd;
3312 /* maximum 3390 track size */
3313 ccw->count = 57326;
3314 /* 64k map to one track */
3315 len_to_track_end = 65536;
3316 ccw->cda = (__u32)(addr_t)idaws;
3317 ccw->flags |= CCW_FLAG_IDA;
3318 ccw->flags |= CCW_FLAG_SLI;
3319 ccw++;
3320 }
3321 len_to_track_end -= seg_len;
3322 idaws = idal_create_words(idaws, dst, seg_len);
3323 }
3324
3325 if (blk_noretry_request(req) ||
3326 block->base->features & DASD_FEATURE_FAILFAST)
3327 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3328 cqr->startdev = startdev;
3329 cqr->memdev = startdev;
3330 cqr->block = block;
3331 cqr->expires = startdev->default_expires * HZ;
3332 cqr->lpm = startdev->path_data.ppm;
3333 cqr->retries = 256;
1aae0560 3334 cqr->buildclk = get_tod_clock();
e4dbb0f2
SH		 3335 cqr->status = DASD_CQR_FILLED;
3336
3337 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
3338 cqr = NULL;
3339out:
3340 return cqr;
3341}
3342
3343
1da177e4
LT		 3344static int
3345dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3346{
3347 struct dasd_eckd_private *private;
3348 struct ccw1 *ccw;
5705f702 3349 struct req_iterator iter;
1da177e4
LT		 3350 struct bio_vec *bv;
3351 char *dst, *cda;
3352 unsigned int blksize, blk_per_trk, off;
3353 sector_t recid;
5705f702 3354 int status;
1da177e4
LT		 3355
3356 if (!dasd_page_cache)
3357 goto out;
8e09f215
SW		 3358 private = (struct dasd_eckd_private *) cqr->block->base->private;
3359 blksize = cqr->block->bp_block;
1da177e4 3360 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 3361 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 3362 ccw = cqr->cpaddr;
3363 /* Skip over define extent & locate record. */
3364 ccw++;
3365 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3366 ccw++;
5705f702 3367 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 3368 dst = page_address(bv->bv_page) + bv->bv_offset;
3369 for (off = 0; off < bv->bv_len; off += blksize) {
3370 /* Skip locate record. */
3371 if (private->uses_cdl && recid <= 2*blk_per_trk)
3372 ccw++;
3373 if (dst) {
3374 if (ccw->flags & CCW_FLAG_IDA)
3375 cda = *((char **)((addr_t) ccw->cda));
3376 else
3377 cda = (char *)((addr_t) ccw->cda);
3378 if (dst != cda) {
3379 if (rq_data_dir(req) == READ)
3380 memcpy(dst, cda, bv->bv_len);
3381 kmem_cache_free(dasd_page_cache,
3382 (void *)((addr_t)cda & PAGE_MASK));
3383 }
3384 dst = NULL;
3385 }
3386 ccw++;
3387 recid++;
3388 }
3389 }
3390out:
3391 status = cqr->status == DASD_CQR_DONE;
8e09f215 3392 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3393 return status;
3394}
3395
8e09f215 3396/*
f3eb5384 3397 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 3398 *
3399 * Note that this is not enough to restart the cqr!
3400 * Either reset cqr->startdev as well (summary unit check handling)
3401 * or restart via separate cqr (as in ERP handling).
3402 */
3403void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3404{
3405 struct ccw1 *ccw;
3406 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 3407 struct tcw *tcw;
3408 struct tccb *tccb;
3409 struct dcw *dcw;
3410
3411 if (cqr->cpmode == 1) {
3412 tcw = cqr->cpaddr;
3413 tccb = tcw_get_tccb(tcw);
3414 dcw = (struct dcw *)&tccb->tca[0];
3415 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 3416 pfxdata->validity.verify_base = 0;
3417 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 3418 } else {
3419 ccw = cqr->cpaddr;
3420 pfxdata = cqr->data;
3421 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
3422 pfxdata->validity.verify_base = 0;
3423 pfxdata->validity.hyper_pav = 0;
3424 }
8e09f215
SW		 3425 }
3426}
3427
3428#define DASD_ECKD_CHANQ_MAX_SIZE 4
3429
3430static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
3431 struct dasd_block *block,
3432 struct request *req)
3433{
3434 struct dasd_eckd_private *private;
3435 struct dasd_device *startdev;
3436 unsigned long flags;
3437 struct dasd_ccw_req *cqr;
3438
3439 startdev = dasd_alias_get_start_dev(base);
3440 if (!startdev)
3441 startdev = base;
3442 private = (struct dasd_eckd_private *) startdev->private;
3443 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
3444 return ERR_PTR(-EBUSY);
3445
3446 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
3447 private->count++;
e4dbb0f2
SH		 3448 if ((base->features & DASD_FEATURE_USERAW))
3449 cqr = dasd_raw_build_cp(startdev, block, req);
3450 else
3451 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 3452 if (IS_ERR(cqr))
3453 private->count--;
3454 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
3455 return cqr;
3456}
3457
3458static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
3459 struct request *req)
3460{
3461 struct dasd_eckd_private *private;
3462 unsigned long flags;
3463
3464 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
3465 private = (struct dasd_eckd_private *) cqr->memdev->private;
3466 private->count--;
3467 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
3468 return dasd_eckd_free_cp(cqr, req);
3469}
3470
1da177e4
LT		 3471static int
3472dasd_eckd_fill_info(struct dasd_device * device,
3473 struct dasd_information2_t * info)
3474{
3475 struct dasd_eckd_private *private;
3476
3477 private = (struct dasd_eckd_private *) device->private;
3478 info->label_block = 2;
3479 info->FBA_layout = private->uses_cdl ? 0 : 1;
3480 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
3481 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
3482 memcpy(info->characteristics, &private->rdc_data,
3483 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 3484 info->confdata_size = min((unsigned long)private->conf_len,
3485 sizeof(info->configuration_data));
3486 memcpy(info->configuration_data, private->conf_data,
3487 info->confdata_size);
1da177e4
LT		 3488 return 0;
3489}
3490
3491/*
3492 * SECTION: ioctl functions for eckd devices.
3493 */
3494
3495/*
3496 * Release device ioctl.
138c014d 3497 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 3498 * (see dasd_eckd_reserve) device.
3499 */
3500static int
1107ccfb 3501dasd_eckd_release(struct dasd_device *device)
1da177e4 3502{
1da177e4
LT		 3503 struct dasd_ccw_req *cqr;
3504 int rc;
f3eb5384 3505 struct ccw1 *ccw;
f932bcea 3506 int useglobal;
1da177e4
LT		 3507
3508 if (!capable(CAP_SYS_ADMIN))
3509 return -EACCES;
3510
f932bcea 3511 useglobal = 0;
68b781fe 3512 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3513 if (IS_ERR(cqr)) {
f932bcea
SW		 3514 mutex_lock(&dasd_reserve_mutex);
3515 useglobal = 1;
3516 cqr = &dasd_reserve_req->cqr;
3517 memset(cqr, 0, sizeof(*cqr));
3518 memset(&dasd_reserve_req->ccw, 0,
3519 sizeof(dasd_reserve_req->ccw));
3520 cqr->cpaddr = &dasd_reserve_req->ccw;
3521 cqr->data = &dasd_reserve_req->data;
3522 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3523 }
f3eb5384
SW		 3524 ccw = cqr->cpaddr;
3525 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
3526 ccw->flags |= CCW_FLAG_SLI;
3527 ccw->count = 32;
3528 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3529 cqr->startdev = device;
3530 cqr->memdev = device;
1da177e4 3531 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3532 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3533 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 3534 cqr->expires = 2 * HZ;
1aae0560 3535 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3536 cqr->status = DASD_CQR_FILLED;
3537
3538 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3539 if (!rc)
3540 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3541
f932bcea
SW		 3542 if (useglobal)
3543 mutex_unlock(&dasd_reserve_mutex);
3544 else
3545 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3546 return rc;
3547}
3548
3549/*
3550 * Reserve device ioctl.
3551 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 3552 * 'timeout the request'. This leads to a terminate IO if
3553 * the interrupt is outstanding for a certain time.
1da177e4
LT		 3554 */
3555static int
1107ccfb 3556dasd_eckd_reserve(struct dasd_device *device)
1da177e4 3557{
1da177e4
LT		 3558 struct dasd_ccw_req *cqr;
3559 int rc;
f3eb5384 3560 struct ccw1 *ccw;
f932bcea 3561 int useglobal;
1da177e4
LT		 3562
3563 if (!capable(CAP_SYS_ADMIN))
3564 return -EACCES;
3565
f932bcea 3566 useglobal = 0;
68b781fe 3567 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3568 if (IS_ERR(cqr)) {
f932bcea
SW		 3569 mutex_lock(&dasd_reserve_mutex);
3570 useglobal = 1;
3571 cqr = &dasd_reserve_req->cqr;
3572 memset(cqr, 0, sizeof(*cqr));
3573 memset(&dasd_reserve_req->ccw, 0,
3574 sizeof(dasd_reserve_req->ccw));
3575 cqr->cpaddr = &dasd_reserve_req->ccw;
3576 cqr->data = &dasd_reserve_req->data;
3577 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3578 }
f3eb5384
SW		 3579 ccw = cqr->cpaddr;
3580 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
3581 ccw->flags |= CCW_FLAG_SLI;
3582 ccw->count = 32;
3583 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3584 cqr->startdev = device;
3585 cqr->memdev = device;
1da177e4 3586 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3587 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3588 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 3589 cqr->expires = 2 * HZ;
1aae0560 3590 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3591 cqr->status = DASD_CQR_FILLED;
3592
3593 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3594 if (!rc)
3595 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3596
f932bcea
SW		 3597 if (useglobal)
3598 mutex_unlock(&dasd_reserve_mutex);
3599 else
3600 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3601 return rc;
3602}
3603
3604/*
3605 * Steal lock ioctl - unconditional reserve device.
138c014d 3606 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 3607 * (unconditional reserve)
3608 */
3609static int
1107ccfb 3610dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 3611{
1da177e4
LT		 3612 struct dasd_ccw_req *cqr;
3613 int rc;
f3eb5384 3614 struct ccw1 *ccw;
f932bcea 3615 int useglobal;
1da177e4
LT		 3616
3617 if (!capable(CAP_SYS_ADMIN))
3618 return -EACCES;
3619
f932bcea 3620 useglobal = 0;
68b781fe 3621 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3622 if (IS_ERR(cqr)) {
f932bcea
SW		 3623 mutex_lock(&dasd_reserve_mutex);
3624 useglobal = 1;
3625 cqr = &dasd_reserve_req->cqr;
3626 memset(cqr, 0, sizeof(*cqr));
3627 memset(&dasd_reserve_req->ccw, 0,
3628 sizeof(dasd_reserve_req->ccw));
3629 cqr->cpaddr = &dasd_reserve_req->ccw;
3630 cqr->data = &dasd_reserve_req->data;
3631 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3632 }
f3eb5384
SW		 3633 ccw = cqr->cpaddr;
3634 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
3635 ccw->flags |= CCW_FLAG_SLI;
3636 ccw->count = 32;
3637 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3638 cqr->startdev = device;
3639 cqr->memdev = device;
1da177e4 3640 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3641 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3642 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 3643 cqr->expires = 2 * HZ;
1aae0560 3644 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3645 cqr->status = DASD_CQR_FILLED;
3646
3647 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3648 if (!rc)
3649 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3650
f932bcea
SW		 3651 if (useglobal)
3652 mutex_unlock(&dasd_reserve_mutex);
3653 else
3654 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3655 return rc;
3656}
3657
196339f1
SW		 3658/*
3659 * SNID - Sense Path Group ID
3660 * This ioctl may be used in situations where I/O is stalled due to
3661 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3662 * preallocated dasd_reserve_req.
3663 */
3664static int dasd_eckd_snid(struct dasd_device *device,
3665 void __user *argp)
3666{
3667 struct dasd_ccw_req *cqr;
3668 int rc;
3669 struct ccw1 *ccw;
3670 int useglobal;
3671 struct dasd_snid_ioctl_data usrparm;
3672
3673 if (!capable(CAP_SYS_ADMIN))
3674 return -EACCES;
3675
3676 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3677 return -EFAULT;
3678
3679 useglobal = 0;
3680 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
3681 sizeof(struct dasd_snid_data), device);
3682 if (IS_ERR(cqr)) {
3683 mutex_lock(&dasd_reserve_mutex);
3684 useglobal = 1;
3685 cqr = &dasd_reserve_req->cqr;
3686 memset(cqr, 0, sizeof(*cqr));
3687 memset(&dasd_reserve_req->ccw, 0,
3688 sizeof(dasd_reserve_req->ccw));
3689 cqr->cpaddr = &dasd_reserve_req->ccw;
3690 cqr->data = &dasd_reserve_req->data;
3691 cqr->magic = DASD_ECKD_MAGIC;
3692 }
3693 ccw = cqr->cpaddr;
3694 ccw->cmd_code = DASD_ECKD_CCW_SNID;
3695 ccw->flags |= CCW_FLAG_SLI;
3696 ccw->count = 12;
3697 ccw->cda = (__u32)(addr_t) cqr->data;
3698 cqr->startdev = device;
3699 cqr->memdev = device;
3700 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3701 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 3702 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 3703 cqr->retries = 5;
3704 cqr->expires = 10 * HZ;
1aae0560 3705 cqr->buildclk = get_tod_clock();
196339f1
SW		 3706 cqr->status = DASD_CQR_FILLED;
3707 cqr->lpm = usrparm.path_mask;
3708
3709 rc = dasd_sleep_on_immediatly(cqr);
3710 /* verify that I/O processing didn't modify the path mask */
3711 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
3712 rc = -EIO;
3713 if (!rc) {
3714 usrparm.data = *((struct dasd_snid_data *)cqr->data);
3715 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
3716 rc = -EFAULT;
3717 }
3718
3719 if (useglobal)
3720 mutex_unlock(&dasd_reserve_mutex);
3721 else
3722 dasd_sfree_request(cqr, cqr->memdev);
3723 return rc;
3724}
3725
1da177e4
LT		 3726/*
3727 * Read performance statistics
3728 */
3729static int
1107ccfb 3730dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 3731{
1da177e4
LT		 3732 struct dasd_psf_prssd_data *prssdp;
3733 struct dasd_rssd_perf_stats_t *stats;
3734 struct dasd_ccw_req *cqr;
3735 struct ccw1 *ccw;
3736 int rc;
3737
68b781fe 3738 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 3739 (sizeof(struct dasd_psf_prssd_data) +
3740 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 3741 device);
3742 if (IS_ERR(cqr)) {
fc19f381 3743 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 3744 "Could not allocate initialization request");
3745 return PTR_ERR(cqr);
3746 }
8e09f215
SW		 3747 cqr->startdev = device;
3748 cqr->memdev = device;
1da177e4 3749 cqr->retries = 0;
eb6e199b 3750 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 3751 cqr->expires = 10 * HZ;
3752
3753 /* Prepare for Read Subsystem Data */
3754 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 3755 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 3756 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 3757 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 3758 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
3759
3760 ccw = cqr->cpaddr;
3761 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 3762 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 3763 ccw->flags |= CCW_FLAG_CC;
3764 ccw->cda = (__u32)(addr_t) prssdp;
3765
3766 /* Read Subsystem Data - Performance Statistics */
3767 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 3768 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 3769
3770 ccw++;
3771 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 3772 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 3773 ccw->cda = (__u32)(addr_t) stats;
3774
1aae0560 3775 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3776 cqr->status = DASD_CQR_FILLED;
3777 rc = dasd_sleep_on(cqr);
3778 if (rc == 0) {
1da177e4
LT		 3779 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3780 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 3781 if (copy_to_user(argp, stats,
3782 sizeof(struct dasd_rssd_perf_stats_t)))
3783 rc = -EFAULT;
1da177e4 3784 }
8e09f215 3785 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3786 return rc;
3787}
3788
3789/*
3790 * Get attributes (cache operations)
3791 * Returnes the cache attributes used in Define Extend (DE).
3792 */
3793static int
1107ccfb 3794dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3795{
1107ccfb
CH		 3796 struct dasd_eckd_private *private =
3797 (struct dasd_eckd_private *)device->private;
3798 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 3799 int rc;
3800
3801 if (!capable(CAP_SYS_ADMIN))
3802 return -EACCES;
1107ccfb 3803 if (!argp)
1da177e4
LT		 3804 return -EINVAL;
3805
1107ccfb
CH		 3806 rc = 0;
3807 if (copy_to_user(argp, (long *) &attrib,
8e09f215 3808 sizeof(struct attrib_data_t)))
1107ccfb 3809 rc = -EFAULT;
1da177e4
LT		 3810
3811 return rc;
3812}
3813
3814/*
3815 * Set attributes (cache operations)
3816 * Stores the attributes for cache operation to be used in Define Extend (DE).
3817 */
3818static int
1107ccfb 3819dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3820{
1107ccfb
CH		 3821 struct dasd_eckd_private *private =
3822 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 3823 struct attrib_data_t attrib;
3824
3825 if (!capable(CAP_SYS_ADMIN))
3826 return -EACCES;
1107ccfb 3827 if (!argp)
1da177e4
LT		 3828 return -EINVAL;
3829
1107ccfb 3830 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 3831 return -EFAULT;
1da177e4
LT		 3832 private->attrib = attrib;
3833
fc19f381
SH		 3834 dev_info(&device->cdev->dev,
3835 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3836 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 3837 return 0;
3838}
3839
ab1d848f
NH		 3840/*
3841 * Issue syscall I/O to EMC Symmetrix array.
3842 * CCWs are PSF and RSSD
3843 */
3844static int dasd_symm_io(struct dasd_device *device, void __user *argp)
3845{
3846 struct dasd_symmio_parms usrparm;
3847 char *psf_data, *rssd_result;
3848 struct dasd_ccw_req *cqr;
3849 struct ccw1 *ccw;
52898025 3850 char psf0, psf1;
ab1d848f
NH		 3851 int rc;
3852
52898025
NH		 3853 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
3854 return -EACCES;
3855 psf0 = psf1 = 0;
3856
ab1d848f
NH		 3857 /* Copy parms from caller */
3858 rc = -EFAULT;
3859 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3860 goto out;
f8b06859
HC		 3861 if (is_compat_task() || sizeof(long) == 4) {
3862 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 3863 rc = -EINVAL;
f8b06859
HC		 3864 if ((usrparm.psf_data >> 32) != 0)
3865 goto out;
3866 if ((usrparm.rssd_result >> 32) != 0)
3867 goto out;
3868 usrparm.psf_data &= 0x7fffffffULL;
3869 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 3870 }
ab1d848f
NH		 3871 /* alloc I/O data area */
3872 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
3873 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
3874 if (!psf_data || !rssd_result) {
3875 rc = -ENOMEM;
3876 goto out_free;
3877 }
3878
3879 /* get syscall header from user space */
3880 rc = -EFAULT;
3881 if (copy_from_user(psf_data,
3882 (void __user *)(unsigned long) usrparm.psf_data,
3883 usrparm.psf_data_len))
3884 goto out_free;
52898025
NH		 3885 psf0 = psf_data[0];
3886 psf1 = psf_data[1];
ab1d848f
NH		 3887
3888 /* setup CCWs for PSF + RSSD */
68b781fe 3889 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 3890 if (IS_ERR(cqr)) {
fc19f381 3891 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 3892 "Could not allocate initialization request");
3893 rc = PTR_ERR(cqr);
3894 goto out_free;
3895 }
3896
3897 cqr->startdev = device;
3898 cqr->memdev = device;
3899 cqr->retries = 3;
3900 cqr->expires = 10 * HZ;
1aae0560 3901 cqr->buildclk = get_tod_clock();
ab1d848f
NH		 3902 cqr->status = DASD_CQR_FILLED;
3903
3904 /* Build the ccws */
3905 ccw = cqr->cpaddr;
3906
3907 /* PSF ccw */
3908 ccw->cmd_code = DASD_ECKD_CCW_PSF;
3909 ccw->count = usrparm.psf_data_len;
3910 ccw->flags |= CCW_FLAG_CC;
3911 ccw->cda = (__u32)(addr_t) psf_data;
3912
3913 ccw++;
3914
3915 /* RSSD ccw */
3916 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
3917 ccw->count = usrparm.rssd_result_len;
3918 ccw->flags = CCW_FLAG_SLI ;
3919 ccw->cda = (__u32)(addr_t) rssd_result;
3920
3921 rc = dasd_sleep_on(cqr);
3922 if (rc)
3923 goto out_sfree;
3924
3925 rc = -EFAULT;
3926 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
3927 rssd_result, usrparm.rssd_result_len))
3928 goto out_sfree;
3929 rc = 0;
3930
3931out_sfree:
3932 dasd_sfree_request(cqr, cqr->memdev);
3933out_free:
3934 kfree(rssd_result);
3935 kfree(psf_data);
3936out:
52898025
NH		 3937 DBF_DEV_EVENT(DBF_WARNING, device,
3938 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
3939 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 3940 return rc;
3941}
3942
1107ccfb 3943static int
8e09f215 3944dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 3945{
8e09f215
SW		 3946 struct dasd_device *device = block->base;
3947
1107ccfb
CH		 3948 switch (cmd) {
3949 case BIODASDGATTR:
3950 return dasd_eckd_get_attrib(device, argp);
3951 case BIODASDSATTR:
3952 return dasd_eckd_set_attrib(device, argp);
3953 case BIODASDPSRD:
3954 return dasd_eckd_performance(device, argp);
3955 case BIODASDRLSE:
3956 return dasd_eckd_release(device);
3957 case BIODASDRSRV:
3958 return dasd_eckd_reserve(device);
3959 case BIODASDSLCK:
3960 return dasd_eckd_steal_lock(device);
196339f1
SW		 3961 case BIODASDSNID:
3962 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 3963 case BIODASDSYMMIO:
3964 return dasd_symm_io(device, argp);
1107ccfb 3965 default:
6b79d14e 3966 return -ENOTTY;
1107ccfb
CH		 3967 }
3968}
3969
445b5b49
HH		 3970/*
3971 * Dump the range of CCWs into 'page' buffer
3972 * and return number of printed chars.
3973 */
4d284cac 3974static int
445b5b49
HH		 3975dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
3976{
3977 int len, count;
3978 char *datap;
3979
3980 len = 0;
3981 while (from <= to) {
773bab4a 3982 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 3983 " CCW %p: %08X %08X DAT:",
3984 from, ((int *) from)[0], ((int *) from)[1]);
3985
3986 /* get pointer to data (consider IDALs) */
3987 if (from->flags & CCW_FLAG_IDA)
3988 datap = (char *) *((addr_t *) (addr_t) from->cda);
3989 else
3990 datap = (char *) ((addr_t) from->cda);
3991
3992 /* dump data (max 32 bytes) */
3993 for (count = 0; count < from->count && count < 32; count++) {
3994 if (count % 8 == 0) len += sprintf(page + len, " ");
3995 if (count % 4 == 0) len += sprintf(page + len, " ");
3996 len += sprintf(page + len, "%02x", datap[count]);
3997 }
3998 len += sprintf(page + len, "\n");
3999 from++;
4000 }
4001 return len;
4002}
4003
fc19f381 4004static void
aeec92ca
SH		 4005dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4006 char *reason)
fc19f381
SH		 4007{
4008 u64 *sense;
a5a0061f 4009 u64 *stat;
aeec92ca
SH		 4010
4011 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 4012 stat = (u64 *) &irb->scsw;
fc19f381 4013 if (sense) {
a5a0061f
SW		 4014 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4015 "%016llx %016llx %016llx %016llx",
4016 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 4017 sense[0], sense[1], sense[2], sense[3]);
fc19f381 4018 } else {
a5a0061f
SW		 4019 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4020 reason, *stat, *((u32 *) (stat + 1)),
4021 "NO VALID SENSE");
fc19f381
SH		 4022 }
4023}
4024
1da177e4
LT		 4025/*
4026 * Print sense data and related channel program.
4027 * Parts are printed because printk buffer is only 1024 bytes.
4028 */
f3eb5384 4029static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 4030 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 4031{
4032 char *page;
445b5b49
HH		 4033 struct ccw1 *first, *last, *fail, *from, *to;
4034 int len, sl, sct;
1da177e4
LT		 4035
4036 page = (char *) get_zeroed_page(GFP_ATOMIC);
4037 if (page == NULL) {
fc19f381
SH		 4038 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4039 "No memory to dump sense data\n");
1da177e4
LT		 4040 return;
4041 }
445b5b49 4042 /* dump the sense data */
773bab4a 4043 len = sprintf(page, PRINTK_HEADER
1da177e4 4044 " I/O status report for device %s:\n",
2a0217d5 4045 dev_name(&device->cdev->dev));
773bab4a 4046 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4047 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4048 "CS:%02X RC:%d\n",
4049 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4050 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4051 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4052 req ? req->intrc : 0);
773bab4a 4053 len += sprintf(page + len, PRINTK_HEADER
1da177e4 4054 " device %s: Failing CCW: %p\n",
2a0217d5 4055 dev_name(&device->cdev->dev),
23d805b6 4056 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 4057 if (irb->esw.esw0.erw.cons) {
4058 for (sl = 0; sl < 4; sl++) {
773bab4a 4059 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 4060 " Sense(hex) %2d-%2d:",
4061 (8 * sl), ((8 * sl) + 7));
4062
4063 for (sct = 0; sct < 8; sct++) {
4064 len += sprintf(page + len, " %02x",
4065 irb->ecw[8 * sl + sct]);
4066 }
4067 len += sprintf(page + len, "\n");
4068 }
4069
4070 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4071 /* 24 Byte Sense Data */
773bab4a 4072 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4073 " 24 Byte: %x MSG %x, "
4074 "%s MSGb to SYSOP\n",
4075 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4076 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 4077 } else {
4078 /* 32 Byte Sense Data */
773bab4a 4079 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4080 " 32 Byte: Format: %x "
4081 "Exception class %x\n",
4082 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 4083 }
4084 } else {
773bab4a 4085 sprintf(page + len, PRINTK_HEADER
445b5b49 4086 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 4087 }
773bab4a 4088 printk(KERN_ERR "%s", page);
445b5b49 4089
8e09f215
SW		 4090 if (req) {
4091 /* req == NULL for unsolicited interrupts */
4092 /* dump the Channel Program (max 140 Bytes per line) */
4093 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4094 first = req->cpaddr;
4095 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4096 to = min(first + 6, last);
773bab4a 4097 len = sprintf(page, PRINTK_HEADER
8e09f215
SW		 4098 " Related CP in req: %p\n", req);
4099 dasd_eckd_dump_ccw_range(first, to, page + len);
773bab4a 4100 printk(KERN_ERR "%s", page);
1da177e4 4101
8e09f215
SW		 4102 /* print failing CCW area (maximum 4) */
4103 /* scsw->cda is either valid or zero */
4104 len = 0;
4105 from = ++to;
23d805b6
PO		 4106 fail = (struct ccw1 *)(addr_t)
4107 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 4108 if (from < fail - 2) {
4109 from = fail - 2; /* there is a gap - print header */
773bab4a 4110 len += sprintf(page, PRINTK_HEADER "......\n");
8e09f215
SW		 4111 }
4112 to = min(fail + 1, last);
4113 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4114
4115 /* print last CCWs (maximum 2) */
4116 from = max(from, ++to);
4117 if (from < last - 1) {
4118 from = last - 1; /* there is a gap - print header */
773bab4a 4119 len += sprintf(page + len, PRINTK_HEADER "......\n");
8e09f215
SW		 4120 }
4121 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4122 if (len > 0)
773bab4a 4123 printk(KERN_ERR "%s", page);
1da177e4 4124 }
1da177e4
LT		 4125 free_page((unsigned long) page);
4126}
4127
f3eb5384
SW		 4128
4129/*
4130 * Print sense data from a tcw.
4131 */
4132static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4133 struct dasd_ccw_req *req, struct irb *irb)
4134{
4135 char *page;
4136 int len, sl, sct, residual;
f3eb5384 4137 struct tsb *tsb;
ef19298b 4138 u8 *sense, *rcq;
f3eb5384
SW		 4139
4140 page = (char *) get_zeroed_page(GFP_ATOMIC);
4141 if (page == NULL) {
fc19f381 4142 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 4143 "No memory to dump sense data");
4144 return;
4145 }
4146 /* dump the sense data */
773bab4a 4147 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 4148 " I/O status report for device %s:\n",
4149 dev_name(&device->cdev->dev));
773bab4a 4150 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4151 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4152 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4153 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4154 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4155 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4156 irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
4157 req ? req->intrc : 0);
773bab4a 4158 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4159 " device %s: Failing TCW: %p\n",
4160 dev_name(&device->cdev->dev),
4161 (void *) (addr_t) irb->scsw.tm.tcw);
4162
4163 tsb = NULL;
4164 sense = NULL;
a5a0061f 4165 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 4166 tsb = tcw_get_tsb(
4167 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4168
b8fde722 4169 if (tsb) {
773bab4a 4170 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4171 " tsb->length %d\n", tsb->length);
773bab4a 4172 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4173 " tsb->flags %x\n", tsb->flags);
773bab4a 4174 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4175 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 4176 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4177 " tsb->count %d\n", tsb->count);
4178 residual = tsb->count - 28;
773bab4a 4179 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4180 " residual %d\n", residual);
4181
4182 switch (tsb->flags & 0x07) {
4183 case 1: /* tsa_iostat */
773bab4a 4184 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4185 " tsb->tsa.iostat.dev_time %d\n",
4186 tsb->tsa.iostat.dev_time);
773bab4a 4187 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4188 " tsb->tsa.iostat.def_time %d\n",
4189 tsb->tsa.iostat.def_time);
773bab4a 4190 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4191 " tsb->tsa.iostat.queue_time %d\n",
4192 tsb->tsa.iostat.queue_time);
773bab4a 4193 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4194 " tsb->tsa.iostat.dev_busy_time %d\n",
4195 tsb->tsa.iostat.dev_busy_time);
773bab4a 4196 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4197 " tsb->tsa.iostat.dev_act_time %d\n",
4198 tsb->tsa.iostat.dev_act_time);
4199 sense = tsb->tsa.iostat.sense;
4200 break;
4201 case 2: /* ts_ddpc */
773bab4a 4202 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4203 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 4204 for (sl = 0; sl < 2; sl++) {
773bab4a 4205 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 4206 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4207 (8 * sl), ((8 * sl) + 7));
4208 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 4209 for (sct = 0; sct < 8; sct++) {
4210 len += sprintf(page + len, " %02x",
ef19298b 4211 rcq[8 * sl + sct]);
f3eb5384
SW		 4212 }
4213 len += sprintf(page + len, "\n");
4214 }
4215 sense = tsb->tsa.ddpc.sense;
4216 break;
4217 case 3: /* tsa_intrg */
773bab4a
SO		 4218 len += sprintf(page + len, PRINTK_HEADER
4219 " tsb->tsa.intrg.: not supportet yet\n");
f3eb5384
SW		 4220 break;
4221 }
4222
4223 if (sense) {
4224 for (sl = 0; sl < 4; sl++) {
773bab4a 4225 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4226 " Sense(hex) %2d-%2d:",
4227 (8 * sl), ((8 * sl) + 7));
4228 for (sct = 0; sct < 8; sct++) {
4229 len += sprintf(page + len, " %02x",
4230 sense[8 * sl + sct]);
4231 }
4232 len += sprintf(page + len, "\n");
4233 }
4234
4235 if (sense[27] & DASD_SENSE_BIT_0) {
4236 /* 24 Byte Sense Data */
773bab4a 4237 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4238 " 24 Byte: %x MSG %x, "
4239 "%s MSGb to SYSOP\n",
4240 sense[7] >> 4, sense[7] & 0x0f,
4241 sense[1] & 0x10 ? "" : "no");
4242 } else {
4243 /* 32 Byte Sense Data */
773bab4a 4244 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4245 " 32 Byte: Format: %x "
4246 "Exception class %x\n",
4247 sense[6] & 0x0f, sense[22] >> 4);
4248 }
4249 } else {
773bab4a 4250 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4251 " SORRY - NO VALID SENSE AVAILABLE\n");
4252 }
4253 } else {
773bab4a 4254 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4255 " SORRY - NO TSB DATA AVAILABLE\n");
4256 }
773bab4a 4257 printk(KERN_ERR "%s", page);
f3eb5384
SW		 4258 free_page((unsigned long) page);
4259}
4260
4261static void dasd_eckd_dump_sense(struct dasd_device *device,
4262 struct dasd_ccw_req *req, struct irb *irb)
4263{
a5a0061f 4264 if (scsw_is_tm(&irb->scsw))
f3eb5384
SW		 4265 dasd_eckd_dump_sense_tcw(device, req, irb);
4266 else
4267 dasd_eckd_dump_sense_ccw(device, req, irb);
4268}
4269
501183f2 4270static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 4271{
4272 /*
4273 * the device should be disconnected from our LCU structure
4274 * on restore we will reconnect it and reread LCU specific
4275 * information like PAV support that might have changed
4276 */
4277 dasd_alias_remove_device(device);
4278 dasd_alias_disconnect_device_from_lcu(device);
4279
4280 return 0;
4281}
4282
501183f2 4283static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122
SH		 4284{
4285 struct dasd_eckd_private *private;
6fca97a9 4286 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 4287 int rc;
d41dd122 4288 struct dasd_uid temp_uid;
a7602f6c 4289 unsigned long flags;
ea4da6ea 4290 unsigned long cqr_flags = 0;
d41dd122 4291
d41dd122
SH		 4292 private = (struct dasd_eckd_private *) device->private;
4293
4294 /* Read Configuration Data */
55d3a85c 4295 dasd_eckd_read_conf(device);
d41dd122 4296
2dedf0d9
SH		 4297 dasd_eckd_get_uid(device, &temp_uid);
4298 /* Generate device unique id */
4299 rc = dasd_eckd_generate_uid(device);
4300 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 4301 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 4302 dev_err(&device->cdev->dev, "The UID of the DASD has "
4303 "changed\n");
2dedf0d9 4304 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4305 if (rc)
4306 goto out_err;
d41dd122
SH		 4307
4308 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 4309 rc = dasd_alias_make_device_known_to_lcu(device);
4310 if (rc)
4311 return rc;
ea4da6ea
SH		 4312
4313 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4314 dasd_eckd_validate_server(device, cqr_flags);
f4ac1d02
SW		 4315
4316 /* RE-Read Configuration Data */
55d3a85c 4317 dasd_eckd_read_conf(device);
d41dd122
SH		 4318
4319 /* Read Feature Codes */
68d1e5f0 4320 dasd_eckd_read_features(device);
d41dd122
SH		 4321
4322 /* Read Device Characteristics */
68b781fe 4323 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 4324 &temp_rdc_data, 64);
d41dd122 4325 if (rc) {
b8ed5dd5
SH		 4326 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4327 "Read device characteristic failed, rc=%d", rc);
d41dd122
SH		 4328 goto out_err;
4329 }
a7602f6c 4330 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 4331 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 4332 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4333
4334 /* add device to alias management */
4335 dasd_alias_add_device(device);
4336
4337 return 0;
4338
4339out_err:
e6125fba 4340 return -1;
d41dd122
SH		 4341}
4342
501183f2
SH		 4343static int dasd_eckd_reload_device(struct dasd_device *device)
4344{
4345 struct dasd_eckd_private *private;
4346 int rc, old_base;
2dedf0d9
SH		 4347 char print_uid[60];
4348 struct dasd_uid uid;
4349 unsigned long flags;
501183f2
SH		 4350
4351 private = (struct dasd_eckd_private *) device->private;
2dedf0d9
SH		 4352
4353 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 4354 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 4355 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4356
501183f2
SH		 4357 /* Read Configuration Data */
4358 rc = dasd_eckd_read_conf(device);
4359 if (rc)
4360 goto out_err;
4361
2dedf0d9 4362 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 4363 if (rc)
4364 goto out_err;
501183f2
SH		 4365 /*
4366 * update unit address configuration and
4367 * add device to alias management
4368 */
4369 dasd_alias_update_add_device(device);
4370
2dedf0d9
SH		 4371 dasd_eckd_get_uid(device, &uid);
4372
4373 if (old_base != uid.base_unit_addr) {
4374 if (strlen(uid.vduit) > 0)
4375 snprintf(print_uid, sizeof(print_uid),
4376 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
4377 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 4378 else
2dedf0d9
SH		 4379 snprintf(print_uid, sizeof(print_uid),
4380 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
4381 uid.ssid, uid.base_unit_addr);
501183f2
SH		 4382
4383 dev_info(&device->cdev->dev,
4384 "An Alias device was reassigned to a new base device "
2dedf0d9 4385 "with UID: %s\n", print_uid);
501183f2
SH		 4386 }
4387 return 0;
4388
4389out_err:
4390 return -1;
4391}
4392
d41dd122 4393static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 4394 .driver = {
4395 .name = "dasd-eckd",
4396 .owner = THIS_MODULE,
4397 },
d41dd122
SH		 4398 .ids = dasd_eckd_ids,
4399 .probe = dasd_eckd_probe,
4400 .remove = dasd_generic_remove,
4401 .set_offline = dasd_generic_set_offline,
4402 .set_online = dasd_eckd_set_online,
4403 .notify = dasd_generic_notify,
a4d26c6a 4404 .path_event = dasd_generic_path_event,
4679e893 4405 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 4406 .freeze = dasd_generic_pm_freeze,
4407 .thaw = dasd_generic_restore_device,
4408 .restore = dasd_generic_restore_device,
a23ed009 4409 .uc_handler = dasd_generic_uc_handler,
420f42ec 4410 .int_class = IRQIO_DAS,
d41dd122 4411};
f3eb5384 4412
1da177e4
LT		 4413/*
4414 * max_blocks is dependent on the amount of storage that is available
4415 * in the static io buffer for each device. Currently each device has
4416 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
4417 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
4418 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
4419 * addition we have one define extent ccw + 16 bytes of data and one
4420 * locate record ccw + 16 bytes of data. That makes:
4421 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
4422 * We want to fit two into the available memory so that we can immediately
4423 * start the next request if one finishes off. That makes 249.5 blocks
4424 * for one request. Give a little safety and the result is 240.
4425 */
4426static struct dasd_discipline dasd_eckd_discipline = {
4427 .owner = THIS_MODULE,
4428 .name = "ECKD",
4429 .ebcname = "ECKD",
ef19298b 4430 .max_blocks = 190,
1da177e4 4431 .check_device = dasd_eckd_check_characteristics,
8e09f215 4432 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 4433 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 4434 .verify_path = dasd_eckd_verify_path,
d42e1712 4435 .basic_to_ready = dasd_eckd_basic_to_ready,
8e09f215 4436 .online_to_ready = dasd_eckd_online_to_ready,
d42e1712 4437 .ready_to_basic = dasd_eckd_ready_to_basic,
1da177e4
LT		 4438 .fill_geometry = dasd_eckd_fill_geometry,
4439 .start_IO = dasd_start_IO,
4440 .term_IO = dasd_term_IO,
8e09f215 4441 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 4442 .format_device = dasd_eckd_format_device,
1da177e4
LT		 4443 .erp_action = dasd_eckd_erp_action,
4444 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 4445 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 4446 .build_cp = dasd_eckd_build_alias_cp,
4447 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 4448 .dump_sense = dasd_eckd_dump_sense,
fc19f381 4449 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 4450 .fill_info = dasd_eckd_fill_info,
1107ccfb 4451 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 4452 .freeze = dasd_eckd_pm_freeze,
4453 .restore = dasd_eckd_restore_device,
501183f2 4454 .reload = dasd_eckd_reload_device,
2dedf0d9 4455 .get_uid = dasd_eckd_get_uid,
f1633031 4456 .kick_validate = dasd_eckd_kick_validate_server,
1da177e4
LT		 4457};
4458
4459static int __init
4460dasd_eckd_init(void)
4461{
736e6ea0
SO		 4462 int ret;
4463
1da177e4 4464 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 4465 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
4466 GFP_KERNEL | GFP_DMA);
4467 if (!dasd_reserve_req)
4468 return -ENOMEM;
a4d26c6a
SW		 4469 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
4470 GFP_KERNEL | GFP_DMA);
4471 if (!path_verification_worker) {
4472 kfree(dasd_reserve_req);
4473 return -ENOMEM;
4474 }
736e6ea0
SO		 4475 ret = ccw_driver_register(&dasd_eckd_driver);
4476 if (!ret)
4477 wait_for_device_probe();
a4d26c6a
SW		 4478 else {
4479 kfree(path_verification_worker);
f932bcea 4480 kfree(dasd_reserve_req);
a4d26c6a 4481 }
736e6ea0 4482 return ret;
1da177e4
LT		 4483}
4484
4485static void __exit
4486dasd_eckd_cleanup(void)
4487{
4488 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 4489 kfree(path_verification_worker);
f932bcea 4490 kfree(dasd_reserve_req);
1da177e4
LT		 4491}
4492
4493module_init(dasd_eckd_init);
4494module_exit(dasd_eckd_cleanup);
Linux kernel - Deliverables
This page took 0.947224 seconds and 5 git commands to generate.