]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blame - drivers/s390/block/dasd_eckd.c
projects / mirror_ubuntu-hirsute-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
s390/dasd: fix failing path verification
[mirror_ubuntu-hirsute-kernel.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>
5db8440c
SH		 32#include <asm/schid.h>
33#include <asm/chpid.h>
1da177e4
LT		 34
35#include "dasd_int.h"
36#include "dasd_eckd.h"
37
38#ifdef PRINTK_HEADER
39#undef PRINTK_HEADER
40#endif /* PRINTK_HEADER */
41#define PRINTK_HEADER "dasd(eckd):"
42
43#define ECKD_C0(i) (i->home_bytes)
44#define ECKD_F(i) (i->formula)
45#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
46 (i->factors.f_0x02.f1))
47#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
48 (i->factors.f_0x02.f2))
49#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
50 (i->factors.f_0x02.f3))
51#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
52#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
53#define ECKD_F6(i) (i->factor6)
54#define ECKD_F7(i) (i->factor7)
55#define ECKD_F8(i) (i->factor8)
56
e4dbb0f2
SH		 57/*
58 * raw track access always map to 64k in memory
59 * so it maps to 16 blocks of 4k per track
60 */
61#define DASD_RAW_BLOCK_PER_TRACK 16
62#define DASD_RAW_BLOCKSIZE 4096
63/* 64k are 128 x 512 byte sectors */
64#define DASD_RAW_SECTORS_PER_TRACK 128
65
1da177e4
LT		 66MODULE_LICENSE("GPL");
67
68static struct dasd_discipline dasd_eckd_discipline;
69
1da177e4
LT		 70/* The ccw bus type uses this table to find devices that it sends to
71 * dasd_eckd_probe */
72static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 73 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
74 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
5da24b76 75 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
d2c993d8
HC		 76 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
77 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
78 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
79 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
81 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 83 { /* end of list */ },
84};
85
86MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
87
88static struct ccw_driver dasd_eckd_driver; /* see below */
89
558b9ef0
SW		 90static void *rawpadpage;
91
eb6e199b
SW		 92#define INIT_CQR_OK 0
93#define INIT_CQR_UNFORMATTED 1
94#define INIT_CQR_ERROR 2
95
f932bcea
SW		 96/* emergency request for reserve/release */
97static struct {
98 struct dasd_ccw_req cqr;
99 struct ccw1 ccw;
100 char data[32];
101} *dasd_reserve_req;
102static DEFINE_MUTEX(dasd_reserve_mutex);
103
a4d26c6a
SW		 104/* definitions for the path verification worker */
105struct path_verification_work_data {
106 struct work_struct worker;
107 struct dasd_device *device;
108 struct dasd_ccw_req cqr;
109 struct ccw1 ccw;
110 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
111 int isglobal;
112 __u8 tbvpm;
113};
114static struct path_verification_work_data *path_verification_worker;
115static DEFINE_MUTEX(dasd_path_verification_mutex);
eb6e199b 116
5db8440c
SH		 117struct check_attention_work_data {
118 struct work_struct worker;
119 struct dasd_device *device;
120 __u8 lpum;
121};
122
1da177e4
LT		 123/* initial attempt at a probe function. this can be simplified once
124 * the other detection code is gone */
125static int
126dasd_eckd_probe (struct ccw_device *cdev)
127{
128 int ret;
129
40545573 130 /* set ECKD specific ccw-device options */
454e1fa1
PO		 131 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
132 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 133 if (ret) {
b8ed5dd5
SH		 134 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
135 "dasd_eckd_probe: could not set "
136 "ccw-device options");
1da177e4 137 return ret;
40545573
HH		 138 }
139 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
140 return ret;
1da177e4
LT		 141}
142
143static int
144dasd_eckd_set_online(struct ccw_device *cdev)
145{
40545573 146 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 147}
148
1da177e4
LT		 149static const int sizes_trk0[] = { 28, 148, 84 };
150#define LABEL_SIZE 140
151
3bc9fef9
SH		 152/* head and record addresses of count_area read in analysis ccw */
153static const int count_area_head[] = { 0, 0, 0, 0, 2 };
154static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
155
1da177e4
LT		 156static inline unsigned int
157round_up_multiple(unsigned int no, unsigned int mult)
158{
159 int rem = no % mult;
160 return (rem ? no - rem + mult : no);
161}
162
163static inline unsigned int
164ceil_quot(unsigned int d1, unsigned int d2)
165{
166 return (d1 + (d2 - 1)) / d2;
167}
168
4d284cac 169static unsigned int
1da177e4
LT		 170recs_per_track(struct dasd_eckd_characteristics * rdc,
171 unsigned int kl, unsigned int dl)
172{
173 int dn, kn;
174
175 switch (rdc->dev_type) {
176 case 0x3380:
177 if (kl)
178 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
179 ceil_quot(dl + 12, 32));
180 else
181 return 1499 / (15 + ceil_quot(dl + 12, 32));
182 case 0x3390:
183 dn = ceil_quot(dl + 6, 232) + 1;
184 if (kl) {
185 kn = ceil_quot(kl + 6, 232) + 1;
186 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
187 9 + ceil_quot(dl + 6 * dn, 34));
188 } else
189 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
190 case 0x9345:
191 dn = ceil_quot(dl + 6, 232) + 1;
192 if (kl) {
193 kn = ceil_quot(kl + 6, 232) + 1;
194 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
195 ceil_quot(dl + 6 * dn, 34));
196 } else
197 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
198 }
199 return 0;
200}
201
b44b0ab3
SW		 202static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
203{
204 geo->cyl = (__u16) cyl;
205 geo->head = cyl >> 16;
206 geo->head <<= 4;
207 geo->head |= head;
208}
209
4d284cac 210static int
1da177e4
LT		 211check_XRC (struct ccw1 *de_ccw,
212 struct DE_eckd_data *data,
213 struct dasd_device *device)
214{
215 struct dasd_eckd_private *private;
d54853ef 216 int rc;
1da177e4
LT		 217
218 private = (struct dasd_eckd_private *) device->private;
d54853ef
MS		 219 if (!private->rdc_data.facilities.XRC_supported)
220 return 0;
1da177e4
LT		 221
222 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 223 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
224 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 225
d54853ef
MS		 226 rc = get_sync_clock(&data->ep_sys_time);
227 /* Ignore return code if sync clock is switched off. */
a8f6db4d 228 if (rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 229 rc = 0;
1da177e4 230
8e09f215 231 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 232 de_ccw->flags |= CCW_FLAG_SLI;
233 return rc;
234}
1da177e4 235
4d284cac 236static int
b44b0ab3
SW		 237define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
238 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4
LT		 239{
240 struct dasd_eckd_private *private;
b44b0ab3
SW		 241 u32 begcyl, endcyl;
242 u16 heads, beghead, endhead;
d54853ef 243 int rc = 0;
1da177e4
LT		 244
245 private = (struct dasd_eckd_private *) device->private;
246
247 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
248 ccw->flags = 0;
249 ccw->count = 16;
250 ccw->cda = (__u32) __pa(data);
251
8e09f215 252 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 253 switch (cmd) {
254 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
255 case DASD_ECKD_CCW_READ_RECORD_ZERO:
256 case DASD_ECKD_CCW_READ:
257 case DASD_ECKD_CCW_READ_MT:
258 case DASD_ECKD_CCW_READ_CKD:
259 case DASD_ECKD_CCW_READ_CKD_MT:
260 case DASD_ECKD_CCW_READ_KD:
261 case DASD_ECKD_CCW_READ_KD_MT:
262 case DASD_ECKD_CCW_READ_COUNT:
263 data->mask.perm = 0x1;
264 data->attributes.operation = private->attrib.operation;
265 break;
266 case DASD_ECKD_CCW_WRITE:
267 case DASD_ECKD_CCW_WRITE_MT:
268 case DASD_ECKD_CCW_WRITE_KD:
269 case DASD_ECKD_CCW_WRITE_KD_MT:
270 data->mask.perm = 0x02;
271 data->attributes.operation = private->attrib.operation;
d54853ef 272 rc = check_XRC (ccw, data, device);
1da177e4
LT		 273 break;
274 case DASD_ECKD_CCW_WRITE_CKD:
275 case DASD_ECKD_CCW_WRITE_CKD_MT:
276 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 277 rc = check_XRC (ccw, data, device);
1da177e4
LT		 278 break;
279 case DASD_ECKD_CCW_ERASE:
280 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
281 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
282 data->mask.perm = 0x3;
283 data->mask.auth = 0x1;
284 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 285 rc = check_XRC (ccw, data, device);
1da177e4
LT		 286 break;
287 default:
fc19f381
SH		 288 dev_err(&device->cdev->dev,
289 "0x%x is not a known command\n", cmd);
1da177e4
LT		 290 break;
291 }
292
293 data->attributes.mode = 0x3; /* ECKD */
294
295 if ((private->rdc_data.cu_type == 0x2105 ||
296 private->rdc_data.cu_type == 0x2107 ||
297 private->rdc_data.cu_type == 0x1750)
298 && !(private->uses_cdl && trk < 2))
299 data->ga_extended |= 0x40; /* Regular Data Format Mode */
300
b44b0ab3
SW		 301 heads = private->rdc_data.trk_per_cyl;
302 begcyl = trk / heads;
303 beghead = trk % heads;
304 endcyl = totrk / heads;
305 endhead = totrk % heads;
1da177e4
LT		 306
307 /* check for sequential prestage - enhance cylinder range */
308 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
309 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 310
b44b0ab3
SW		 311 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
312 endcyl += private->attrib.nr_cyl;
1da177e4 313 else
b44b0ab3 314 endcyl = (private->real_cyl - 1);
1da177e4
LT		 315 }
316
b44b0ab3
SW		 317 set_ch_t(&data->beg_ext, begcyl, beghead);
318 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 319 return rc;
1da177e4
LT		 320}
321
8e09f215
SW		 322static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
323 struct dasd_device *device)
324{
325 struct dasd_eckd_private *private;
326 int rc;
327
328 private = (struct dasd_eckd_private *) device->private;
329 if (!private->rdc_data.facilities.XRC_supported)
330 return 0;
331
332 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 333 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
334 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 335 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
336
f3eb5384 337 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215 338 /* Ignore return code if sync clock is switched off. */
a8f6db4d 339 if (rc == -EOPNOTSUPP || rc == -EACCES)
8e09f215
SW		 340 rc = 0;
341 return rc;
342}
343
f3eb5384
SW		 344static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
345 unsigned int rec_on_trk, int count, int cmd,
346 struct dasd_device *device, unsigned int reclen,
347 unsigned int tlf)
348{
349 struct dasd_eckd_private *private;
350 int sector;
351 int dn, d;
352
353 private = (struct dasd_eckd_private *) device->private;
354
355 memset(data, 0, sizeof(*data));
356 sector = 0;
357 if (rec_on_trk) {
358 switch (private->rdc_data.dev_type) {
359 case 0x3390:
360 dn = ceil_quot(reclen + 6, 232);
361 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
362 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
363 break;
364 case 0x3380:
365 d = 7 + ceil_quot(reclen + 12, 32);
366 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
367 break;
368 }
369 }
370 data->sector = sector;
371 /* note: meaning of count depends on the operation
372 * for record based I/O it's the number of records, but for
373 * track based I/O it's the number of tracks
374 */
375 data->count = count;
376 switch (cmd) {
377 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
378 data->operation.orientation = 0x3;
379 data->operation.operation = 0x03;
380 break;
381 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
382 data->operation.orientation = 0x3;
383 data->operation.operation = 0x16;
384 break;
385 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
386 data->operation.orientation = 0x1;
387 data->operation.operation = 0x03;
388 data->count++;
389 break;
390 case DASD_ECKD_CCW_READ_RECORD_ZERO:
391 data->operation.orientation = 0x3;
392 data->operation.operation = 0x16;
393 data->count++;
394 break;
395 case DASD_ECKD_CCW_WRITE:
396 case DASD_ECKD_CCW_WRITE_MT:
397 case DASD_ECKD_CCW_WRITE_KD:
398 case DASD_ECKD_CCW_WRITE_KD_MT:
399 data->auxiliary.length_valid = 0x1;
400 data->length = reclen;
401 data->operation.operation = 0x01;
402 break;
403 case DASD_ECKD_CCW_WRITE_CKD:
404 case DASD_ECKD_CCW_WRITE_CKD_MT:
405 data->auxiliary.length_valid = 0x1;
406 data->length = reclen;
407 data->operation.operation = 0x03;
408 break;
e4dbb0f2
SH		 409 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
410 data->operation.orientation = 0x0;
411 data->operation.operation = 0x3F;
412 data->extended_operation = 0x11;
413 data->length = 0;
414 data->extended_parameter_length = 0x02;
415 if (data->count > 8) {
416 data->extended_parameter[0] = 0xFF;
417 data->extended_parameter[1] = 0xFF;
418 data->extended_parameter[1] <<= (16 - count);
419 } else {
420 data->extended_parameter[0] = 0xFF;
421 data->extended_parameter[0] <<= (8 - count);
422 data->extended_parameter[1] = 0x00;
423 }
424 data->sector = 0xFF;
425 break;
f3eb5384
SW		 426 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
427 data->auxiliary.length_valid = 0x1;
428 data->length = reclen; /* not tlf, as one might think */
429 data->operation.operation = 0x3F;
430 data->extended_operation = 0x23;
431 break;
432 case DASD_ECKD_CCW_READ:
433 case DASD_ECKD_CCW_READ_MT:
434 case DASD_ECKD_CCW_READ_KD:
435 case DASD_ECKD_CCW_READ_KD_MT:
436 data->auxiliary.length_valid = 0x1;
437 data->length = reclen;
438 data->operation.operation = 0x06;
439 break;
440 case DASD_ECKD_CCW_READ_CKD:
441 case DASD_ECKD_CCW_READ_CKD_MT:
442 data->auxiliary.length_valid = 0x1;
443 data->length = reclen;
444 data->operation.operation = 0x16;
445 break;
446 case DASD_ECKD_CCW_READ_COUNT:
447 data->operation.operation = 0x06;
448 break;
e4dbb0f2
SH		 449 case DASD_ECKD_CCW_READ_TRACK:
450 data->operation.orientation = 0x1;
451 data->operation.operation = 0x0C;
452 data->extended_parameter_length = 0;
453 data->sector = 0xFF;
454 break;
f3eb5384
SW		 455 case DASD_ECKD_CCW_READ_TRACK_DATA:
456 data->auxiliary.length_valid = 0x1;
457 data->length = tlf;
458 data->operation.operation = 0x0C;
459 break;
460 case DASD_ECKD_CCW_ERASE:
461 data->length = reclen;
462 data->auxiliary.length_valid = 0x1;
463 data->operation.operation = 0x0b;
464 break;
465 default:
466 DBF_DEV_EVENT(DBF_ERR, device,
467 "fill LRE unknown opcode 0x%x", cmd);
468 BUG();
469 }
470 set_ch_t(&data->seek_addr,
471 trk / private->rdc_data.trk_per_cyl,
472 trk % private->rdc_data.trk_per_cyl);
473 data->search_arg.cyl = data->seek_addr.cyl;
474 data->search_arg.head = data->seek_addr.head;
475 data->search_arg.record = rec_on_trk;
476}
477
478static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
479 unsigned int trk, unsigned int totrk, int cmd,
480 struct dasd_device *basedev, struct dasd_device *startdev,
481 unsigned char format, unsigned int rec_on_trk, int count,
482 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 483{
484 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 485 struct DE_eckd_data *dedata;
486 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 487 u32 begcyl, endcyl;
488 u16 heads, beghead, endhead;
8e09f215
SW		 489 int rc = 0;
490
491 basepriv = (struct dasd_eckd_private *) basedev->private;
492 startpriv = (struct dasd_eckd_private *) startdev->private;
f3eb5384
SW		 493 dedata = &pfxdata->define_extent;
494 lredata = &pfxdata->locate_record;
8e09f215
SW		 495
496 ccw->cmd_code = DASD_ECKD_CCW_PFX;
497 ccw->flags = 0;
e4dbb0f2
SH		 498 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
499 ccw->count = sizeof(*pfxdata) + 2;
500 ccw->cda = (__u32) __pa(pfxdata);
501 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
502 } else {
503 ccw->count = sizeof(*pfxdata);
504 ccw->cda = (__u32) __pa(pfxdata);
505 memset(pfxdata, 0, sizeof(*pfxdata));
506 }
8e09f215 507
8e09f215 508 /* prefix data */
f3eb5384
SW		 509 if (format > 1) {
510 DBF_DEV_EVENT(DBF_ERR, basedev,
511 "PFX LRE unknown format 0x%x", format);
512 BUG();
513 return -EINVAL;
514 }
515 pfxdata->format = format;
4abb08c2
SW		 516 pfxdata->base_address = basepriv->ned->unit_addr;
517 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 518 pfxdata->validity.define_extent = 1;
8e09f215
SW		 519
520 /* private uid is kept up to date, conf_data may be outdated */
521 if (startpriv->uid.type != UA_BASE_DEVICE) {
522 pfxdata->validity.verify_base = 1;
523 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
524 pfxdata->validity.hyper_pav = 1;
525 }
526
527 /* define extend data (mostly)*/
528 switch (cmd) {
529 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
530 case DASD_ECKD_CCW_READ_RECORD_ZERO:
531 case DASD_ECKD_CCW_READ:
532 case DASD_ECKD_CCW_READ_MT:
533 case DASD_ECKD_CCW_READ_CKD:
534 case DASD_ECKD_CCW_READ_CKD_MT:
535 case DASD_ECKD_CCW_READ_KD:
536 case DASD_ECKD_CCW_READ_KD_MT:
537 case DASD_ECKD_CCW_READ_COUNT:
f3eb5384
SW		 538 dedata->mask.perm = 0x1;
539 dedata->attributes.operation = basepriv->attrib.operation;
540 break;
e4dbb0f2 541 case DASD_ECKD_CCW_READ_TRACK:
f3eb5384
SW		 542 case DASD_ECKD_CCW_READ_TRACK_DATA:
543 dedata->mask.perm = 0x1;
544 dedata->attributes.operation = basepriv->attrib.operation;
545 dedata->blk_size = 0;
8e09f215
SW		 546 break;
547 case DASD_ECKD_CCW_WRITE:
548 case DASD_ECKD_CCW_WRITE_MT:
549 case DASD_ECKD_CCW_WRITE_KD:
550 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 551 dedata->mask.perm = 0x02;
552 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 553 rc = check_XRC_on_prefix(pfxdata, basedev);
554 break;
555 case DASD_ECKD_CCW_WRITE_CKD:
556 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 557 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 558 rc = check_XRC_on_prefix(pfxdata, basedev);
559 break;
560 case DASD_ECKD_CCW_ERASE:
561 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
562 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 563 dedata->mask.perm = 0x3;
564 dedata->mask.auth = 0x1;
565 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 566 rc = check_XRC_on_prefix(pfxdata, basedev);
567 break;
e4dbb0f2
SH		 568 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
569 dedata->mask.perm = 0x03;
570 dedata->attributes.operation = basepriv->attrib.operation;
571 dedata->blk_size = 0;
572 break;
f3eb5384
SW		 573 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
574 dedata->mask.perm = 0x02;
575 dedata->attributes.operation = basepriv->attrib.operation;
576 dedata->blk_size = blksize;
577 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 578 break;
f3eb5384
SW		 579 default:
580 DBF_DEV_EVENT(DBF_ERR, basedev,
581 "PFX LRE unknown opcode 0x%x", cmd);
582 BUG();
583 return -EINVAL;
8e09f215
SW		 584 }
585
f3eb5384 586 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 587
588 if ((basepriv->rdc_data.cu_type == 0x2105 ||
589 basepriv->rdc_data.cu_type == 0x2107 ||
590 basepriv->rdc_data.cu_type == 0x1750)
591 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 592 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 593
b44b0ab3
SW		 594 heads = basepriv->rdc_data.trk_per_cyl;
595 begcyl = trk / heads;
596 beghead = trk % heads;
597 endcyl = totrk / heads;
598 endhead = totrk % heads;
8e09f215
SW		 599
600 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 601 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
602 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 603
b44b0ab3
SW		 604 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
605 endcyl += basepriv->attrib.nr_cyl;
8e09f215 606 else
b44b0ab3 607 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 608 }
609
f3eb5384
SW		 610 set_ch_t(&dedata->beg_ext, begcyl, beghead);
611 set_ch_t(&dedata->end_ext, endcyl, endhead);
612
613 if (format == 1) {
614 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
615 basedev, blksize, tlf);
616 }
617
8e09f215
SW		 618 return rc;
619}
620
f3eb5384
SW		 621static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
622 unsigned int trk, unsigned int totrk, int cmd,
623 struct dasd_device *basedev, struct dasd_device *startdev)
624{
625 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
626 0, 0, 0, 0, 0);
627}
628
4d284cac 629static void
b44b0ab3
SW		 630locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
631 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 632 struct dasd_device * device, int reclen)
633{
634 struct dasd_eckd_private *private;
635 int sector;
636 int dn, d;
138c014d 637
1da177e4
LT		 638 private = (struct dasd_eckd_private *) device->private;
639
640 DBF_DEV_EVENT(DBF_INFO, device,
641 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
642 trk, rec_on_trk, no_rec, cmd, reclen);
643
644 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
645 ccw->flags = 0;
646 ccw->count = 16;
647 ccw->cda = (__u32) __pa(data);
648
8e09f215 649 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 650 sector = 0;
651 if (rec_on_trk) {
652 switch (private->rdc_data.dev_type) {
653 case 0x3390:
654 dn = ceil_quot(reclen + 6, 232);
655 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
656 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
657 break;
658 case 0x3380:
659 d = 7 + ceil_quot(reclen + 12, 32);
660 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
661 break;
662 }
663 }
664 data->sector = sector;
665 data->count = no_rec;
666 switch (cmd) {
667 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
668 data->operation.orientation = 0x3;
669 data->operation.operation = 0x03;
670 break;
671 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
672 data->operation.orientation = 0x3;
673 data->operation.operation = 0x16;
674 break;
675 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
676 data->operation.orientation = 0x1;
677 data->operation.operation = 0x03;
678 data->count++;
679 break;
680 case DASD_ECKD_CCW_READ_RECORD_ZERO:
681 data->operation.orientation = 0x3;
682 data->operation.operation = 0x16;
683 data->count++;
684 break;
685 case DASD_ECKD_CCW_WRITE:
686 case DASD_ECKD_CCW_WRITE_MT:
687 case DASD_ECKD_CCW_WRITE_KD:
688 case DASD_ECKD_CCW_WRITE_KD_MT:
689 data->auxiliary.last_bytes_used = 0x1;
690 data->length = reclen;
691 data->operation.operation = 0x01;
692 break;
693 case DASD_ECKD_CCW_WRITE_CKD:
694 case DASD_ECKD_CCW_WRITE_CKD_MT:
695 data->auxiliary.last_bytes_used = 0x1;
696 data->length = reclen;
697 data->operation.operation = 0x03;
698 break;
699 case DASD_ECKD_CCW_READ:
700 case DASD_ECKD_CCW_READ_MT:
701 case DASD_ECKD_CCW_READ_KD:
702 case DASD_ECKD_CCW_READ_KD_MT:
703 data->auxiliary.last_bytes_used = 0x1;
704 data->length = reclen;
705 data->operation.operation = 0x06;
706 break;
707 case DASD_ECKD_CCW_READ_CKD:
708 case DASD_ECKD_CCW_READ_CKD_MT:
709 data->auxiliary.last_bytes_used = 0x1;
710 data->length = reclen;
711 data->operation.operation = 0x16;
712 break;
713 case DASD_ECKD_CCW_READ_COUNT:
714 data->operation.operation = 0x06;
715 break;
716 case DASD_ECKD_CCW_ERASE:
717 data->length = reclen;
718 data->auxiliary.last_bytes_used = 0x1;
719 data->operation.operation = 0x0b;
720 break;
721 default:
fc19f381
SH		 722 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
723 "opcode 0x%x", cmd);
1da177e4 724 }
b44b0ab3
SW		 725 set_ch_t(&data->seek_addr,
726 trk / private->rdc_data.trk_per_cyl,
727 trk % private->rdc_data.trk_per_cyl);
728 data->search_arg.cyl = data->seek_addr.cyl;
729 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 730 data->search_arg.record = rec_on_trk;
731}
732
733/*
734 * Returns 1 if the block is one of the special blocks that needs
735 * to get read/written with the KD variant of the command.
736 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
737 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
738 * Luckily the KD variants differ only by one bit (0x08) from the
739 * normal variant. So don't wonder about code like:
740 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
741 * ccw->cmd_code |= 0x8;
742 */
743static inline int
744dasd_eckd_cdl_special(int blk_per_trk, int recid)
745{
746 if (recid < 3)
747 return 1;
748 if (recid < blk_per_trk)
749 return 0;
750 if (recid < 2 * blk_per_trk)
751 return 1;
752 return 0;
753}
754
755/*
756 * Returns the record size for the special blocks of the cdl format.
757 * Only returns something useful if dasd_eckd_cdl_special is true
758 * for the recid.
759 */
760static inline int
761dasd_eckd_cdl_reclen(int recid)
762{
763 if (recid < 3)
764 return sizes_trk0[recid];
765 return LABEL_SIZE;
766}
b206181d
SH		 767/* create unique id from private structure. */
768static void create_uid(struct dasd_eckd_private *private)
3d052595 769{
4abb08c2 770 int count;
b206181d 771 struct dasd_uid *uid;
3d052595 772
2dedf0d9 773 uid = &private->uid;
3d052595 774 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 775 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 776 sizeof(uid->vendor) - 1);
3d052595 777 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 778 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 779 sizeof(uid->serial) - 1);
3d052595 780 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 781 uid->ssid = private->gneq->subsystemID;
a419aef8 782 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 783 if (private->sneq) {
784 uid->type = private->sneq->sua_flags;
8e09f215 785 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 786 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 787 } else {
788 uid->type = UA_BASE_DEVICE;
789 }
4abb08c2
SW		 790 if (private->vdsneq) {
791 for (count = 0; count < 16; count++) {
792 sprintf(uid->vduit+2*count, "%02x",
793 private->vdsneq->uit[count]);
794 }
795 }
b206181d
SH		 796}
797
798/*
799 * Generate device unique id that specifies the physical device.
800 */
801static int dasd_eckd_generate_uid(struct dasd_device *device)
802{
803 struct dasd_eckd_private *private;
804 unsigned long flags;
805
806 private = (struct dasd_eckd_private *) device->private;
807 if (!private)
808 return -ENODEV;
809 if (!private->ned || !private->gneq)
810 return -ENODEV;
811 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
812 create_uid(private);
2dedf0d9 813 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 814 return 0;
815}
816
2dedf0d9
SH		 817static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
818{
819 struct dasd_eckd_private *private;
820 unsigned long flags;
821
822 if (device->private) {
823 private = (struct dasd_eckd_private *)device->private;
824 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
825 *uid = private->uid;
826 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
827 return 0;
828 }
829 return -EINVAL;
830}
831
b206181d
SH		 832/*
833 * compare device UID with data of a given dasd_eckd_private structure
834 * return 0 for match
835 */
836static int dasd_eckd_compare_path_uid(struct dasd_device *device,
837 struct dasd_eckd_private *private)
838{
839 struct dasd_uid device_uid;
840
841 create_uid(private);
842 dasd_eckd_get_uid(device, &device_uid);
843
844 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
845}
846
a4d26c6a
SW		 847static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
848 struct dasd_ccw_req *cqr,
849 __u8 *rcd_buffer,
850 __u8 lpm)
17283b56 851{
17283b56 852 struct ccw1 *ccw;
a4d26c6a
SW		 853 /*
854 * buffer has to start with EBCDIC "V1.0" to show
855 * support for virtual device SNEQ
856 */
857 rcd_buffer[0] = 0xE5;
858 rcd_buffer[1] = 0xF1;
859 rcd_buffer[2] = 0x4B;
860 rcd_buffer[3] = 0xF0;
17283b56
CH		 861
862 ccw = cqr->cpaddr;
a4d26c6a
SW		 863 ccw->cmd_code = DASD_ECKD_CCW_RCD;
864 ccw->flags = 0;
17283b56 865 ccw->cda = (__u32)(addr_t)rcd_buffer;
a4d26c6a
SW		 866 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
867 cqr->magic = DASD_ECKD_MAGIC;
17283b56 868
8e09f215
SW		 869 cqr->startdev = device;
870 cqr->memdev = device;
871 cqr->block = NULL;
17283b56
CH		 872 cqr->expires = 10*HZ;
873 cqr->lpm = lpm;
eb6e199b 874 cqr->retries = 256;
1aae0560 875 cqr->buildclk = get_tod_clock();
17283b56 876 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 877 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
878}
879
5915a873
SH		 880/*
881 * Wakeup helper for read_conf
882 * if the cqr is not done and needs some error recovery
883 * the buffer has to be re-initialized with the EBCDIC "V1.0"
884 * to show support for virtual device SNEQ
885 */
886static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
887{
888 struct ccw1 *ccw;
889 __u8 *rcd_buffer;
890
891 if (cqr->status != DASD_CQR_DONE) {
892 ccw = cqr->cpaddr;
893 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
894 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
895
896 rcd_buffer[0] = 0xE5;
897 rcd_buffer[1] = 0xF1;
898 rcd_buffer[2] = 0x4B;
899 rcd_buffer[3] = 0xF0;
900 }
901 dasd_wakeup_cb(cqr, data);
902}
903
a4d26c6a
SW		 904static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
905 struct dasd_ccw_req *cqr,
906 __u8 *rcd_buffer,
907 __u8 lpm)
908{
909 struct ciw *ciw;
910 int rc;
911 /*
912 * sanity check: scan for RCD command in extended SenseID data
913 * some devices do not support RCD
914 */
915 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
916 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
917 return -EOPNOTSUPP;
918
919 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
920 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 921 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 922 cqr->retries = 5;
5915a873 923 cqr->callback = read_conf_cb;
a4d26c6a
SW		 924 rc = dasd_sleep_on_immediatly(cqr);
925 return rc;
17283b56
CH		 926}
927
928static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
929 void **rcd_buffer,
930 int *rcd_buffer_size, __u8 lpm)
931{
932 struct ciw *ciw;
933 char *rcd_buf = NULL;
934 int ret;
935 struct dasd_ccw_req *cqr;
936
937 /*
a4d26c6a
SW		 938 * sanity check: scan for RCD command in extended SenseID data
939 * some devices do not support RCD
17283b56
CH		 940 */
941 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 942 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 943 ret = -EOPNOTSUPP;
944 goto out_error;
945 }
a4d26c6a 946 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 947 if (!rcd_buf) {
948 ret = -ENOMEM;
949 goto out_error;
950 }
a4d26c6a
SW		 951 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
952 0, /* use rcd_buf as data ara */
953 device);
17283b56 954 if (IS_ERR(cqr)) {
a4d26c6a
SW		 955 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
956 "Could not allocate RCD request");
957 ret = -ENOMEM;
17283b56
CH		 958 goto out_error;
959 }
a4d26c6a 960 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 961 cqr->callback = read_conf_cb;
17283b56
CH		 962 ret = dasd_sleep_on(cqr);
963 /*
964 * on success we update the user input parms
965 */
8e09f215 966 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 967 if (ret)
968 goto out_error;
969
a4d26c6a 970 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 971 *rcd_buffer = rcd_buf;
972 return 0;
973out_error:
974 kfree(rcd_buf);
975 *rcd_buffer = NULL;
976 *rcd_buffer_size = 0;
977 return ret;
978}
979
4abb08c2
SW		 980static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
981{
982
983 struct dasd_sneq *sneq;
984 int i, count;
985
986 private->ned = NULL;
987 private->sneq = NULL;
988 private->vdsneq = NULL;
989 private->gneq = NULL;
990 count = private->conf_len / sizeof(struct dasd_sneq);
991 sneq = (struct dasd_sneq *)private->conf_data;
992 for (i = 0; i < count; ++i) {
993 if (sneq->flags.identifier == 1 && sneq->format == 1)
994 private->sneq = sneq;
995 else if (sneq->flags.identifier == 1 && sneq->format == 4)
996 private->vdsneq = (struct vd_sneq *)sneq;
997 else if (sneq->flags.identifier == 2)
998 private->gneq = (struct dasd_gneq *)sneq;
999 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
1000 private->ned = (struct dasd_ned *)sneq;
1001 sneq++;
1002 }
1003 if (!private->ned || !private->gneq) {
1004 private->ned = NULL;
1005 private->sneq = NULL;
1006 private->vdsneq = NULL;
1007 private->gneq = NULL;
1008 return -EINVAL;
1009 }
1010 return 0;
1011
1012};
1013
1014static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
1015{
1016 struct dasd_gneq *gneq;
1017 int i, count, found;
1018
1019 count = conf_len / sizeof(*gneq);
1020 gneq = (struct dasd_gneq *)conf_data;
1021 found = 0;
1022 for (i = 0; i < count; ++i) {
1023 if (gneq->flags.identifier == 2) {
1024 found = 1;
1025 break;
1026 }
1027 gneq++;
1028 }
1029 if (found)
1030 return ((char *)gneq)[18] & 0x07;
1031 else
1032 return 0;
1033}
1034
1035static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 1036{
1037 void *conf_data;
1038 int conf_len, conf_data_saved;
55d3a85c 1039 int rc, path_err;
a4d26c6a 1040 __u8 lpm, opm;
b206181d 1041 struct dasd_eckd_private *private, path_private;
a4d26c6a 1042 struct dasd_path *path_data;
b206181d
SH		 1043 struct dasd_uid *uid;
1044 char print_path_uid[60], print_device_uid[60];
1da177e4
LT		 1045
1046 private = (struct dasd_eckd_private *) device->private;
a4d26c6a
SW		 1047 path_data = &device->path_data;
1048 opm = ccw_device_get_path_mask(device->cdev);
1da177e4 1049 conf_data_saved = 0;
55d3a85c 1050 path_err = 0;
1da177e4
LT		 1051 /* get configuration data per operational path */
1052 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1053 if (!(lpm & opm))
1054 continue;
1055 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1056 &conf_len, lpm);
1057 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1058 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1059 "Read configuration data returned "
1060 "error %d", rc);
1061 return rc;
1062 }
1063 if (conf_data == NULL) {
1064 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1065 "No configuration data "
1066 "retrieved");
1067 /* no further analysis possible */
1068 path_data->opm |= lpm;
1069 continue; /* no error */
1070 }
1071 /* save first valid configuration data */
1072 if (!conf_data_saved) {
1073 kfree(private->conf_data);
1074 private->conf_data = conf_data;
1075 private->conf_len = conf_len;
1076 if (dasd_eckd_identify_conf_parts(private)) {
1077 private->conf_data = NULL;
1078 private->conf_len = 0;
1079 kfree(conf_data);
1080 continue;
1da177e4 1081 }
b206181d
SH		 1082 /*
1083 * build device UID that other path data
1084 * can be compared to it
1085 */
1086 dasd_eckd_generate_uid(device);
1087 conf_data_saved++;
1088 } else {
1089 path_private.conf_data = conf_data;
1090 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1091 if (dasd_eckd_identify_conf_parts(
1092 &path_private)) {
1093 path_private.conf_data = NULL;
1094 path_private.conf_len = 0;
1095 kfree(conf_data);
1096 continue;
1da177e4 1097 }
b206181d
SH		 1098
1099 if (dasd_eckd_compare_path_uid(
1100 device, &path_private)) {
1101 uid = &path_private.uid;
1102 if (strlen(uid->vduit) > 0)
1103 snprintf(print_path_uid,
1104 sizeof(print_path_uid),
1105 "%s.%s.%04x.%02x.%s",
1106 uid->vendor, uid->serial,
1107 uid->ssid, uid->real_unit_addr,
1108 uid->vduit);
1109 else
1110 snprintf(print_path_uid,
1111 sizeof(print_path_uid),
1112 "%s.%s.%04x.%02x",
1113 uid->vendor, uid->serial,
1114 uid->ssid,
1115 uid->real_unit_addr);
1116 uid = &private->uid;
1117 if (strlen(uid->vduit) > 0)
1118 snprintf(print_device_uid,
1119 sizeof(print_device_uid),
1120 "%s.%s.%04x.%02x.%s",
1121 uid->vendor, uid->serial,
1122 uid->ssid, uid->real_unit_addr,
1123 uid->vduit);
1124 else
1125 snprintf(print_device_uid,
1126 sizeof(print_device_uid),
1127 "%s.%s.%04x.%02x",
1128 uid->vendor, uid->serial,
1129 uid->ssid,
1130 uid->real_unit_addr);
1131 dev_err(&device->cdev->dev,
1132 "Not all channel paths lead to "
1133 "the same device, path %02X leads to "
1134 "device %s instead of %s\n", lpm,
1135 print_path_uid, print_device_uid);
55d3a85c 1136 path_err = -EINVAL;
5db8440c 1137 path_data->cablepm |= lpm;
55d3a85c 1138 continue;
1da177e4 1139 }
b206181d
SH		 1140
1141 path_private.conf_data = NULL;
1142 path_private.conf_len = 0;
1143 }
1144 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1145 case 0x02:
1146 path_data->npm |= lpm;
1147 break;
1148 case 0x03:
1149 path_data->ppm |= lpm;
1150 break;
1da177e4 1151 }
b206181d 1152 path_data->opm |= lpm;
5db8440c
SH		 1153 /*
1154 * if the path is used
1155 * it should not be in one of the negative lists
1156 */
1157 path_data->cablepm &= ~lpm;
1158 path_data->hpfpm &= ~lpm;
1159 path_data->cuirpm &= ~lpm;
b206181d
SH		 1160
1161 if (conf_data != private->conf_data)
1162 kfree(conf_data);
1da177e4 1163 }
b206181d 1164
55d3a85c 1165 return path_err;
1da177e4
LT		 1166}
1167
a4d26c6a
SW		 1168static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1169{
1170 struct dasd_eckd_private *private;
1171 int mdc;
1172 u32 fcx_max_data;
1173
1174 private = (struct dasd_eckd_private *) device->private;
1175 if (private->fcx_max_data) {
1176 mdc = ccw_device_get_mdc(device->cdev, lpm);
1177 if ((mdc < 0)) {
1178 dev_warn(&device->cdev->dev,
1179 "Detecting the maximum data size for zHPF "
1180 "requests failed (rc=%d) for a new path %x\n",
1181 mdc, lpm);
1182 return mdc;
1183 }
1184 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
1185 if (fcx_max_data < private->fcx_max_data) {
1186 dev_warn(&device->cdev->dev,
1187 "The maximum data size for zHPF requests %u "
1188 "on a new path %x is below the active maximum "
1189 "%u\n", fcx_max_data, lpm,
1190 private->fcx_max_data);
1191 return -EACCES;
1192 }
1193 }
1194 return 0;
1195}
1196
b206181d
SH		 1197static int rebuild_device_uid(struct dasd_device *device,
1198 struct path_verification_work_data *data)
1199{
1200 struct dasd_eckd_private *private;
1201 struct dasd_path *path_data;
1202 __u8 lpm, opm;
1203 int rc;
1204
1205 rc = -ENODEV;
1206 private = (struct dasd_eckd_private *) device->private;
1207 path_data = &device->path_data;
1208 opm = device->path_data.opm;
1209
1210 for (lpm = 0x80; lpm; lpm >>= 1) {
1211 if (!(lpm & opm))
1212 continue;
1213 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1214 memset(&data->cqr, 0, sizeof(data->cqr));
1215 data->cqr.cpaddr = &data->ccw;
1216 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1217 data->rcd_buffer,
1218 lpm);
1219
1220 if (rc) {
1221 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1222 continue;
1223 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1224 "Read configuration data "
1225 "returned error %d", rc);
1226 break;
1227 }
1228 memcpy(private->conf_data, data->rcd_buffer,
1229 DASD_ECKD_RCD_DATA_SIZE);
1230 if (dasd_eckd_identify_conf_parts(private)) {
1231 rc = -ENODEV;
1232 } else /* first valid path is enough */
1233 break;
1234 }
1235
1236 if (!rc)
1237 rc = dasd_eckd_generate_uid(device);
1238
1239 return rc;
1240}
1241
a4d26c6a
SW		 1242static void do_path_verification_work(struct work_struct *work)
1243{
1244 struct path_verification_work_data *data;
1245 struct dasd_device *device;
b206181d
SH		 1246 struct dasd_eckd_private path_private;
1247 struct dasd_uid *uid;
1248 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
5db8440c 1249 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
a4d26c6a 1250 unsigned long flags;
b206181d 1251 char print_uid[60];
a4d26c6a
SW		 1252 int rc;
1253
1254 data = container_of(work, struct path_verification_work_data, worker);
1255 device = data->device;
1256
c8d1c0ff
SH		 1257 /* delay path verification until device was resumed */
1258 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1259 schedule_work(work);
1260 return;
1261 }
1eb38023
SH		 1262 /* check if path verification already running and delay if so */
1263 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1264 schedule_work(work);
1265 return;
1266 }
a4d26c6a
SW		 1267 opm = 0;
1268 npm = 0;
1269 ppm = 0;
1270 epm = 0;
5db8440c
SH		 1271 hpfpm = 0;
1272 cablepm = 0;
1273
a4d26c6a 1274 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1275 if (!(lpm & data->tbvpm))
1276 continue;
1277 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1278 memset(&data->cqr, 0, sizeof(data->cqr));
1279 data->cqr.cpaddr = &data->ccw;
1280 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1281 data->rcd_buffer,
1282 lpm);
1283 if (!rc) {
1284 switch (dasd_eckd_path_access(data->rcd_buffer,
1285 DASD_ECKD_RCD_DATA_SIZE)
1286 ) {
1287 case 0x02:
1288 npm |= lpm;
1289 break;
1290 case 0x03:
1291 ppm |= lpm;
1292 break;
1293 }
1294 opm |= lpm;
1295 } else if (rc == -EOPNOTSUPP) {
1296 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1297 "path verification: No configuration "
1298 "data retrieved");
1299 opm |= lpm;
1300 } else if (rc == -EAGAIN) {
1301 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1302 "path verification: device is stopped,"
1303 " try again later");
b206181d
SH		 1304 epm |= lpm;
1305 } else {
1306 dev_warn(&device->cdev->dev,
1307 "Reading device feature codes failed "
1308 "(rc=%d) for new path %x\n", rc, lpm);
1309 continue;
1310 }
1311 if (verify_fcx_max_data(device, lpm)) {
1312 opm &= ~lpm;
1313 npm &= ~lpm;
1314 ppm &= ~lpm;
5db8440c 1315 hpfpm |= lpm;
b206181d
SH		 1316 continue;
1317 }
1318
1319 /*
1320 * save conf_data for comparison after
1321 * rebuild_device_uid may have changed
1322 * the original data
1323 */
1324 memcpy(&path_rcd_buf, data->rcd_buffer,
1325 DASD_ECKD_RCD_DATA_SIZE);
1326 path_private.conf_data = (void *) &path_rcd_buf;
1327 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1328 if (dasd_eckd_identify_conf_parts(&path_private)) {
1329 path_private.conf_data = NULL;
1330 path_private.conf_len = 0;
1331 continue;
1332 }
1333
1334 /*
1335 * compare path UID with device UID only if at least
1336 * one valid path is left
1337 * in other case the device UID may have changed and
1338 * the first working path UID will be used as device UID
1339 */
1340 if (device->path_data.opm &&
1341 dasd_eckd_compare_path_uid(device, &path_private)) {
1342 /*
1343 * the comparison was not successful
1344 * rebuild the device UID with at least one
1345 * known path in case a z/VM hyperswap command
1346 * has changed the device
1347 *
1348 * after this compare again
1349 *
1350 * if either the rebuild or the recompare fails
1351 * the path can not be used
1352 */
1353 if (rebuild_device_uid(device, data) ||
1354 dasd_eckd_compare_path_uid(
1355 device, &path_private)) {
1356 uid = &path_private.uid;
1357 if (strlen(uid->vduit) > 0)
1358 snprintf(print_uid, sizeof(print_uid),
1359 "%s.%s.%04x.%02x.%s",
1360 uid->vendor, uid->serial,
1361 uid->ssid, uid->real_unit_addr,
1362 uid->vduit);
1363 else
1364 snprintf(print_uid, sizeof(print_uid),
1365 "%s.%s.%04x.%02x",
1366 uid->vendor, uid->serial,
1367 uid->ssid,
1368 uid->real_unit_addr);
1369 dev_err(&device->cdev->dev,
1370 "The newly added channel path %02X "
1371 "will not be used because it leads "
1372 "to a different device %s\n",
1373 lpm, print_uid);
a4d26c6a
SW		 1374 opm &= ~lpm;
1375 npm &= ~lpm;
1376 ppm &= ~lpm;
5db8440c 1377 cablepm |= lpm;
b206181d 1378 continue;
a4d26c6a
SW		 1379 }
1380 }
b206181d
SH		 1381
1382 /*
1383 * There is a small chance that a path is lost again between
1384 * above path verification and the following modification of
1385 * the device opm mask. We could avoid that race here by using
1386 * yet another path mask, but we rather deal with this unlikely
1387 * situation in dasd_start_IO.
1388 */
1389 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1390 if (!device->path_data.opm && opm) {
1391 device->path_data.opm = opm;
5db8440c
SH		 1392 device->path_data.cablepm &= ~opm;
1393 device->path_data.cuirpm &= ~opm;
1394 device->path_data.hpfpm &= ~opm;
b206181d 1395 dasd_generic_path_operational(device);
5db8440c 1396 } else {
b206181d 1397 device->path_data.opm |= opm;
5db8440c
SH		 1398 device->path_data.cablepm &= ~opm;
1399 device->path_data.cuirpm &= ~opm;
1400 device->path_data.hpfpm &= ~opm;
1401 }
b206181d
SH		 1402 device->path_data.npm |= npm;
1403 device->path_data.ppm |= ppm;
1404 device->path_data.tbvpm |= epm;
5db8440c
SH		 1405 device->path_data.cablepm |= cablepm;
1406 device->path_data.hpfpm |= hpfpm;
b206181d 1407 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1408 }
1eb38023 1409 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
a4d26c6a
SW		 1410 dasd_put_device(device);
1411 if (data->isglobal)
1412 mutex_unlock(&dasd_path_verification_mutex);
1413 else
1414 kfree(data);
1415}
1416
1417static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1418{
1419 struct path_verification_work_data *data;
1420
1421 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1422 if (!data) {
1423 if (mutex_trylock(&dasd_path_verification_mutex)) {
1424 data = path_verification_worker;
1425 data->isglobal = 1;
1426 } else
1427 return -ENOMEM;
1428 } else {
1429 memset(data, 0, sizeof(*data));
1430 data->isglobal = 0;
1431 }
1432 INIT_WORK(&data->worker, do_path_verification_work);
1433 dasd_get_device(device);
1434 data->device = device;
1435 data->tbvpm = lpm;
1436 schedule_work(&data->worker);
1437 return 0;
1438}
1439
8e09f215
SW		 1440static int dasd_eckd_read_features(struct dasd_device *device)
1441{
1442 struct dasd_psf_prssd_data *prssdp;
1443 struct dasd_rssd_features *features;
1444 struct dasd_ccw_req *cqr;
1445 struct ccw1 *ccw;
1446 int rc;
1447 struct dasd_eckd_private *private;
1448
1449 private = (struct dasd_eckd_private *) device->private;
68d1e5f0 1450 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1451 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1452 (sizeof(struct dasd_psf_prssd_data) +
1453 sizeof(struct dasd_rssd_features)),
1454 device);
1455 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1456 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1457 "allocate initialization request");
8e09f215
SW		 1458 return PTR_ERR(cqr);
1459 }
1460 cqr->startdev = device;
1461 cqr->memdev = device;
1462 cqr->block = NULL;
eb6e199b 1463 cqr->retries = 256;
8e09f215
SW		 1464 cqr->expires = 10 * HZ;
1465
1466 /* Prepare for Read Subsystem Data */
1467 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1468 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1469 prssdp->order = PSF_ORDER_PRSSD;
1470 prssdp->suborder = 0x41; /* Read Feature Codes */
1471 /* all other bytes of prssdp must be zero */
1472
1473 ccw = cqr->cpaddr;
1474 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1475 ccw->count = sizeof(struct dasd_psf_prssd_data);
1476 ccw->flags |= CCW_FLAG_CC;
1477 ccw->cda = (__u32)(addr_t) prssdp;
1478
1479 /* Read Subsystem Data - feature codes */
1480 features = (struct dasd_rssd_features *) (prssdp + 1);
1481 memset(features, 0, sizeof(struct dasd_rssd_features));
1482
1483 ccw++;
1484 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1485 ccw->count = sizeof(struct dasd_rssd_features);
1486 ccw->cda = (__u32)(addr_t) features;
1487
1aae0560 1488 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1489 cqr->status = DASD_CQR_FILLED;
1490 rc = dasd_sleep_on(cqr);
1491 if (rc == 0) {
1492 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1493 features = (struct dasd_rssd_features *) (prssdp + 1);
1494 memcpy(&private->features, features,
1495 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1496 } else
1497 dev_warn(&device->cdev->dev, "Reading device feature codes"
1498 " failed with rc=%d\n", rc);
8e09f215
SW		 1499 dasd_sfree_request(cqr, cqr->memdev);
1500 return rc;
1501}
1502
1503
40545573
HH		 1504/*
1505 * Build CP for Perform Subsystem Function - SSC.
1506 */
f3eb5384
SW		 1507static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1508 int enable_pav)
40545573 1509{
8e09f215
SW		 1510 struct dasd_ccw_req *cqr;
1511 struct dasd_psf_ssc_data *psf_ssc_data;
1512 struct ccw1 *ccw;
40545573 1513
68b781fe 1514 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1515 sizeof(struct dasd_psf_ssc_data),
1516 device);
1517
8e09f215 1518 if (IS_ERR(cqr)) {
fc19f381 1519 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1520 "Could not allocate PSF-SSC request");
8e09f215
SW		 1521 return cqr;
1522 }
1523 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1524 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1525 psf_ssc_data->suborder = 0xc0;
f3eb5384 1526 if (enable_pav) {
626350b6 1527 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1528 psf_ssc_data->reserved[0] = 0x88;
1529 }
8e09f215
SW		 1530 ccw = cqr->cpaddr;
1531 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1532 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1533 ccw->count = 66;
1534
1535 cqr->startdev = device;
1536 cqr->memdev = device;
1537 cqr->block = NULL;
eb6e199b 1538 cqr->retries = 256;
8e09f215 1539 cqr->expires = 10*HZ;
1aae0560 1540 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1541 cqr->status = DASD_CQR_FILLED;
1542 return cqr;
40545573
HH		 1543}
1544
1545/*
1546 * Perform Subsystem Function.
1547 * It is necessary to trigger CIO for channel revalidation since this
1548 * call might change behaviour of DASD devices.
1549 */
1550static int
12d7b107
SH		 1551dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1552 unsigned long flags)
40545573 1553{
8e09f215
SW		 1554 struct dasd_ccw_req *cqr;
1555 int rc;
1556
f3eb5384 1557 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1558 if (IS_ERR(cqr))
1559 return PTR_ERR(cqr);
1560
12d7b107
SH		 1561 /*
1562 * set flags e.g. turn on failfast, to prevent blocking
1563 * the calling function should handle failed requests
1564 */
1565 cqr->flags |= flags;
1566
8e09f215
SW		 1567 rc = dasd_sleep_on(cqr);
1568 if (!rc)
1569 /* trigger CIO to reprobe devices */
1570 css_schedule_reprobe();
12d7b107
SH		 1571 else if (cqr->intrc == -EAGAIN)
1572 rc = -EAGAIN;
1573
8e09f215
SW		 1574 dasd_sfree_request(cqr, cqr->memdev);
1575 return rc;
40545573
HH		 1576}
1577
1578/*
1579 * Valide storage server of current device.
1580 */
12d7b107
SH		 1581static int dasd_eckd_validate_server(struct dasd_device *device,
1582 unsigned long flags)
40545573
HH		 1583{
1584 int rc;
8e09f215 1585 struct dasd_eckd_private *private;
f3eb5384 1586 int enable_pav;
40545573 1587
f9f8d02f
SH		 1588 private = (struct dasd_eckd_private *) device->private;
1589 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1590 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1591 return 0;
40545573 1592 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1593 enable_pav = 0;
1594 else
1595 enable_pav = 1;
12d7b107 1596 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1597
8e79a441
HH		 1598 /* may be requested feature is not available on server,
1599 * therefore just report error and go ahead */
b8ed5dd5
SH		 1600 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1601 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1602 return rc;
40545573
HH		 1603}
1604
f1633031
SH		 1605/*
1606 * worker to do a validate server in case of a lost pathgroup
1607 */
1608static void dasd_eckd_do_validate_server(struct work_struct *work)
1609{
1610 struct dasd_device *device = container_of(work, struct dasd_device,
1611 kick_validate);
ea4da6ea
SH		 1612 unsigned long flags = 0;
1613
1614 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1615 if (dasd_eckd_validate_server(device, flags)
12d7b107
SH		 1616 == -EAGAIN) {
1617 /* schedule worker again if failed */
1618 schedule_work(&device->kick_validate);
1619 return;
1620 }
1621
f1633031
SH		 1622 dasd_put_device(device);
1623}
1624
1625static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1626{
1627 dasd_get_device(device);
25e2cf1c
SH		 1628 /* exit if device not online or in offline processing */
1629 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1630 device->state < DASD_STATE_ONLINE) {
1631 dasd_put_device(device);
1632 return;
1633 }
f1633031 1634 /* queue call to do_validate_server to the kernel event daemon. */
f2608cd4
SH		 1635 if (!schedule_work(&device->kick_validate))
1636 dasd_put_device(device);
f1633031
SH		 1637}
1638
ef19298b
SW		 1639static u32 get_fcx_max_data(struct dasd_device *device)
1640{
ef19298b
SW		 1641 int tpm, mdc;
1642 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1643 struct dasd_eckd_private *private;
1644
1645 if (dasd_nofcx)
1646 return 0;
1647 /* is transport mode supported? */
1648 private = (struct dasd_eckd_private *) device->private;
1649 fcx_in_css = css_general_characteristics.fcx;
1650 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1651 fcx_in_features = private->features.feature[40] & 0x80;
1652 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1653
1654 if (!tpm)
1655 return 0;
1656
1657 mdc = ccw_device_get_mdc(device->cdev, 0);
1658 if (mdc < 0) {
1659 dev_warn(&device->cdev->dev, "Detecting the maximum supported"
1660 " data size for zHPF requests failed\n");
1661 return 0;
1662 } else
1663 return mdc * FCX_MAX_DATA_FACTOR;
ef19298b
SW		 1664}
1665
3d052595
HH		 1666/*
1667 * Check device characteristics.
1668 * If the device is accessible using ECKD discipline, the device is enabled.
1669 */
1da177e4
LT		 1670static int
1671dasd_eckd_check_characteristics(struct dasd_device *device)
1672{
1673 struct dasd_eckd_private *private;
8e09f215 1674 struct dasd_block *block;
2dedf0d9 1675 struct dasd_uid temp_uid;
f9f8d02f 1676 int rc, i;
33b62a30 1677 int readonly;
7c8faa86 1678 unsigned long value;
1da177e4 1679
f1633031
SH		 1680 /* setup work queue for validate server*/
1681 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1682
454e1fa1
PO		 1683 if (!ccw_device_is_pathgroup(device->cdev)) {
1684 dev_warn(&device->cdev->dev,
1685 "A channel path group could not be established\n");
1686 return -EIO;
1687 }
1688 if (!ccw_device_is_multipath(device->cdev)) {
1689 dev_info(&device->cdev->dev,
1690 "The DASD is not operating in multipath mode\n");
1691 }
1da177e4 1692 private = (struct dasd_eckd_private *) device->private;
92636b15
SO		 1693 if (!private) {
1694 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1695 if (!private) {
fc19f381
SH		 1696 dev_warn(&device->cdev->dev,
1697 "Allocating memory for private DASD data "
1698 "failed\n");
1da177e4
LT		 1699 return -ENOMEM;
1700 }
1da177e4 1701 device->private = (void *) private;
92636b15
SO		 1702 } else {
1703 memset(private, 0, sizeof(*private));
1da177e4
LT		 1704 }
1705 /* Invalidate status of initial analysis. */
1706 private->init_cqr_status = -1;
1707 /* Set default cache operations. */
1708 private->attrib.operation = DASD_NORMAL_CACHE;
1709 private->attrib.nr_cyl = 0;
1710
40545573
HH		 1711 /* Read Configuration Data */
1712 rc = dasd_eckd_read_conf(device);
1713 if (rc)
8e09f215 1714 goto out_err1;
40545573 1715
7c8faa86
SH		 1716 /* set default timeout */
1717 device->default_expires = DASD_EXPIRES;
1f1ee9ad
HR		 1718 /* set default retry count */
1719 device->default_retries = DASD_RETRIES;
1720
7c8faa86
SH		 1721 if (private->gneq) {
1722 value = 1;
1723 for (i = 0; i < private->gneq->timeout.value; i++)
1724 value = 10 * value;
1725 value = value * private->gneq->timeout.number;
1726 /* do not accept useless values */
1727 if (value != 0 && value <= DASD_EXPIRES_MAX)
1728 device->default_expires = value;
1729 }
1730
2dedf0d9
SH		 1731 dasd_eckd_get_uid(device, &temp_uid);
1732 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1733 block = dasd_alloc_block();
1734 if (IS_ERR(block)) {
b8ed5dd5
SH		 1735 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1736 "could not allocate dasd "
1737 "block structure");
8e09f215
SW		 1738 rc = PTR_ERR(block);
1739 goto out_err1;
1740 }
1741 device->block = block;
1742 block->base = device;
1743 }
1744
f9f8d02f
SH		 1745 /* register lcu with alias handling, enable PAV */
1746 rc = dasd_alias_make_device_known_to_lcu(device);
1747 if (rc)
8e09f215 1748 goto out_err2;
f9f8d02f 1749
12d7b107 1750 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 1751
1752 /* device may report different configuration data after LCU setup */
1753 rc = dasd_eckd_read_conf(device);
1754 if (rc)
1755 goto out_err3;
8e09f215
SW		 1756
1757 /* Read Feature Codes */
68d1e5f0 1758 dasd_eckd_read_features(device);
40545573 1759
1da177e4 1760 /* Read Device Characteristics */
68b781fe
SH		 1761 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1762 &private->rdc_data, 64);
8e09f215 1763 if (rc) {
b8ed5dd5
SH		 1764 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1765 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1766 goto out_err3;
1767 }
34cd551a
SH		 1768
1769 if ((device->features & DASD_FEATURE_USERAW) &&
1770 !(private->rdc_data.facilities.RT_in_LR)) {
1771 dev_err(&device->cdev->dev, "The storage server does not "
1772 "support raw-track access\n");
1773 rc = -EINVAL;
1774 goto out_err3;
1775 }
1776
817f2c84 1777 /* find the valid cylinder size */
b44b0ab3
SW		 1778 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1779 private->rdc_data.long_no_cyl)
1780 private->real_cyl = private->rdc_data.long_no_cyl;
1781 else
1782 private->real_cyl = private->rdc_data.no_cyl;
1783
ef19298b
SW		 1784 private->fcx_max_data = get_fcx_max_data(device);
1785
33b62a30
SW		 1786 readonly = dasd_device_is_ro(device);
1787 if (readonly)
1788 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1789
fc19f381 1790 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1791 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1792 private->rdc_data.dev_type,
1793 private->rdc_data.dev_model,
1794 private->rdc_data.cu_type,
1795 private->rdc_data.cu_model.model,
92636b15 1796 private->real_cyl,
fc19f381 1797 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1798 private->rdc_data.sec_per_trk,
1799 readonly ? ", read-only device" : "");
8e09f215
SW		 1800 return 0;
1801
1802out_err3:
1803 dasd_alias_disconnect_device_from_lcu(device);
1804out_err2:
1805 dasd_free_block(device->block);
1806 device->block = NULL;
1807out_err1:
4abb08c2 1808 kfree(private->conf_data);
8e09f215
SW		 1809 kfree(device->private);
1810 device->private = NULL;
3d052595 1811 return rc;
1da177e4
LT		 1812}
1813
8e09f215
SW		 1814static void dasd_eckd_uncheck_device(struct dasd_device *device)
1815{
4abb08c2
SW		 1816 struct dasd_eckd_private *private;
1817
1818 private = (struct dasd_eckd_private *) device->private;
8e09f215 1819 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1820 private->ned = NULL;
1821 private->sneq = NULL;
1822 private->vdsneq = NULL;
1823 private->gneq = NULL;
1824 private->conf_len = 0;
1825 kfree(private->conf_data);
1826 private->conf_data = NULL;
8e09f215
SW		 1827}
1828
1da177e4
LT		 1829static struct dasd_ccw_req *
1830dasd_eckd_analysis_ccw(struct dasd_device *device)
1831{
1832 struct dasd_eckd_private *private;
1833 struct eckd_count *count_data;
1834 struct LO_eckd_data *LO_data;
1835 struct dasd_ccw_req *cqr;
1836 struct ccw1 *ccw;
1837 int cplength, datasize;
1838 int i;
1839
1840 private = (struct dasd_eckd_private *) device->private;
1841
1842 cplength = 8;
1843 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1844 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1845 if (IS_ERR(cqr))
1846 return cqr;
1847 ccw = cqr->cpaddr;
1848 /* Define extent for the first 3 tracks. */
1849 define_extent(ccw++, cqr->data, 0, 2,
1850 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1851 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1852 /* Locate record for the first 4 records on track 0. */
1853 ccw[-1].flags |= CCW_FLAG_CC;
1854 locate_record(ccw++, LO_data++, 0, 0, 4,
1855 DASD_ECKD_CCW_READ_COUNT, device, 0);
1856
1857 count_data = private->count_area;
1858 for (i = 0; i < 4; i++) {
1859 ccw[-1].flags |= CCW_FLAG_CC;
1860 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1861 ccw->flags = 0;
1862 ccw->count = 8;
1863 ccw->cda = (__u32)(addr_t) count_data;
1864 ccw++;
1865 count_data++;
1866 }
1867
1868 /* Locate record for the first record on track 2. */
1869 ccw[-1].flags |= CCW_FLAG_CC;
1870 locate_record(ccw++, LO_data++, 2, 0, 1,
1871 DASD_ECKD_CCW_READ_COUNT, device, 0);
1872 /* Read count ccw. */
1873 ccw[-1].flags |= CCW_FLAG_CC;
1874 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1875 ccw->flags = 0;
1876 ccw->count = 8;
1877 ccw->cda = (__u32)(addr_t) count_data;
1878
8e09f215
SW		 1879 cqr->block = NULL;
1880 cqr->startdev = device;
1881 cqr->memdev = device;
eb6e199b 1882 cqr->retries = 255;
1aae0560 1883 cqr->buildclk = get_tod_clock();
1da177e4
LT		 1884 cqr->status = DASD_CQR_FILLED;
1885 return cqr;
1886}
1887
eb6e199b
SW		 1888/* differentiate between 'no record found' and any other error */
1889static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1890{
1891 char *sense;
1892 if (init_cqr->status == DASD_CQR_DONE)
1893 return INIT_CQR_OK;
1894 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1895 init_cqr->status == DASD_CQR_FAILED) {
1896 sense = dasd_get_sense(&init_cqr->irb);
1897 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1898 return INIT_CQR_UNFORMATTED;
1899 else
1900 return INIT_CQR_ERROR;
1901 } else
1902 return INIT_CQR_ERROR;
1903}
1904
1da177e4
LT		 1905/*
1906 * This is the callback function for the init_analysis cqr. It saves
1907 * the status of the initial analysis ccw before it frees it and kicks
1908 * the device to continue the startup sequence. This will call
1909 * dasd_eckd_do_analysis again (if the devices has not been marked
1910 * for deletion in the meantime).
1911 */
eb6e199b
SW		 1912static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1913 void *data)
1da177e4
LT		 1914{
1915 struct dasd_eckd_private *private;
1916 struct dasd_device *device;
1917
8e09f215 1918 device = init_cqr->startdev;
1da177e4 1919 private = (struct dasd_eckd_private *) device->private;
eb6e199b 1920 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1921 dasd_sfree_request(init_cqr, device);
1922 dasd_kick_device(device);
1923}
1924
eb6e199b 1925static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 1926{
1da177e4
LT		 1927 struct dasd_ccw_req *init_cqr;
1928
8e09f215 1929 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1930 if (IS_ERR(init_cqr))
1931 return PTR_ERR(init_cqr);
1932 init_cqr->callback = dasd_eckd_analysis_callback;
1933 init_cqr->callback_data = NULL;
1934 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1935 /* first try without ERP, so we can later handle unformatted
1936 * devices as special case
1937 */
1938 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1939 init_cqr->retries = 0;
1da177e4
LT		 1940 dasd_add_request_head(init_cqr);
1941 return -EAGAIN;
1942}
1943
eb6e199b 1944static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1945{
8e09f215 1946 struct dasd_device *device;
1da177e4
LT		 1947 struct dasd_eckd_private *private;
1948 struct eckd_count *count_area;
1949 unsigned int sb, blk_per_trk;
1950 int status, i;
eb6e199b 1951 struct dasd_ccw_req *init_cqr;
1da177e4 1952
8e09f215 1953 device = block->base;
1da177e4
LT		 1954 private = (struct dasd_eckd_private *) device->private;
1955 status = private->init_cqr_status;
1956 private->init_cqr_status = -1;
eb6e199b
SW		 1957 if (status == INIT_CQR_ERROR) {
1958 /* try again, this time with full ERP */
1959 init_cqr = dasd_eckd_analysis_ccw(device);
1960 dasd_sleep_on(init_cqr);
1961 status = dasd_eckd_analysis_evaluation(init_cqr);
1962 dasd_sfree_request(init_cqr, device);
1963 }
1964
e4dbb0f2
SH		 1965 if (device->features & DASD_FEATURE_USERAW) {
1966 block->bp_block = DASD_RAW_BLOCKSIZE;
1967 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1968 block->s2b_shift = 3;
1969 goto raw;
1970 }
1971
eb6e199b
SW		 1972 if (status == INIT_CQR_UNFORMATTED) {
1973 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1974 return -EMEDIUMTYPE;
eb6e199b
SW		 1975 } else if (status == INIT_CQR_ERROR) {
1976 dev_err(&device->cdev->dev,
1977 "Detecting the DASD disk layout failed because "
1978 "of an I/O error\n");
1979 return -EIO;
1da177e4
LT		 1980 }
1981
1982 private->uses_cdl = 1;
1da177e4
LT		 1983 /* Check Track 0 for Compatible Disk Layout */
1984 count_area = NULL;
1985 for (i = 0; i < 3; i++) {
1986 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 1987 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
1988 private->count_area[i].cyl != 0 ||
1989 private->count_area[i].head != count_area_head[i] ||
1990 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 1991 private->uses_cdl = 0;
1992 break;
1993 }
1994 }
1995 if (i == 3)
1996 count_area = &private->count_area[4];
1997
1998 if (private->uses_cdl == 0) {
1999 for (i = 0; i < 5; i++) {
2000 if ((private->count_area[i].kl != 0) ||
2001 (private->count_area[i].dl !=
3bc9fef9
SH		 2002 private->count_area[0].dl) ||
2003 private->count_area[i].cyl != 0 ||
2004 private->count_area[i].head != count_area_head[i] ||
2005 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 2006 break;
2007 }
2008 if (i == 5)
2009 count_area = &private->count_area[0];
2010 } else {
2011 if (private->count_area[3].record == 1)
fc19f381
SH		 2012 dev_warn(&device->cdev->dev,
2013 "Track 0 has no records following the VTOC\n");
1da177e4 2014 }
e4dbb0f2 2015
1da177e4
LT		 2016 if (count_area != NULL && count_area->kl == 0) {
2017 /* we found notthing violating our disk layout */
2018 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 2019 block->bp_block = count_area->dl;
1da177e4 2020 }
8e09f215 2021 if (block->bp_block == 0) {
fc19f381
SH		 2022 dev_warn(&device->cdev->dev,
2023 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 2024 return -EMEDIUMTYPE;
2025 }
8e09f215
SW		 2026 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2027 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2028 block->s2b_shift++;
1da177e4 2029
8e09f215 2030 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 2031
2032raw:
b44b0ab3 2033 block->blocks = (private->real_cyl *
1da177e4
LT		 2034 private->rdc_data.trk_per_cyl *
2035 blk_per_trk);
2036
fc19f381
SH		 2037 dev_info(&device->cdev->dev,
2038 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2039 "%s\n", (block->bp_block >> 10),
2040 ((private->real_cyl *
2041 private->rdc_data.trk_per_cyl *
2042 blk_per_trk * (block->bp_block >> 9)) >> 1),
2043 ((blk_per_trk * block->bp_block) >> 10),
2044 private->uses_cdl ?
2045 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 2046
2047 return 0;
2048}
2049
8e09f215 2050static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 2051{
2052 struct dasd_eckd_private *private;
2053
8e09f215 2054 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 2055 if (private->init_cqr_status < 0)
8e09f215 2056 return dasd_eckd_start_analysis(block);
1da177e4 2057 else
8e09f215 2058 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2059}
2060
d42e1712 2061static int dasd_eckd_basic_to_ready(struct dasd_device *device)
8e09f215
SW		 2062{
2063 return dasd_alias_add_device(device);
2064};
2065
2066static int dasd_eckd_online_to_ready(struct dasd_device *device)
2067{
501183f2 2068 cancel_work_sync(&device->reload_device);
25e2cf1c 2069 cancel_work_sync(&device->kick_validate);
d42e1712
SH		 2070 return 0;
2071};
2072
daa991bf 2073static int dasd_eckd_basic_to_known(struct dasd_device *device)
d42e1712 2074{
8e09f215
SW		 2075 return dasd_alias_remove_device(device);
2076};
2077
1da177e4 2078static int
8e09f215 2079dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 2080{
2081 struct dasd_eckd_private *private;
2082
8e09f215
SW		 2083 private = (struct dasd_eckd_private *) block->base->private;
2084 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2085 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2086 0, block->bp_block);
1da177e4
LT		 2087 }
2088 geo->cylinders = private->rdc_data.no_cyl;
2089 geo->heads = private->rdc_data.trk_per_cyl;
2090 return 0;
2091}
2092
2093static struct dasd_ccw_req *
d42e1712 2094dasd_eckd_build_format(struct dasd_device *base,
29b8dd9d 2095 struct format_data_t *fdata,
a94fa154 2096 int enable_pav)
1da177e4 2097{
d42e1712
SH		 2098 struct dasd_eckd_private *base_priv;
2099 struct dasd_eckd_private *start_priv;
29b8dd9d 2100 struct dasd_device *startdev = NULL;
1da177e4
LT		 2101 struct dasd_ccw_req *fcp;
2102 struct eckd_count *ect;
d42e1712 2103 struct ch_t address;
1da177e4
LT		 2104 struct ccw1 *ccw;
2105 void *data;
b44b0ab3 2106 int rpt;
1da177e4 2107 int cplength, datasize;
d42e1712 2108 int i, j;
f9a28f7b
JBJ		 2109 int intensity = 0;
2110 int r0_perm;
d42e1712 2111 int nr_tracks;
18d6624e 2112 int use_prefix;
1da177e4 2113
a94fa154 2114 if (enable_pav)
29b8dd9d
SH		 2115 startdev = dasd_alias_get_start_dev(base);
2116
d42e1712
SH		 2117 if (!startdev)
2118 startdev = base;
1da177e4 2119
d42e1712
SH		 2120 start_priv = (struct dasd_eckd_private *) startdev->private;
2121 base_priv = (struct dasd_eckd_private *) base->private;
2122
2123 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2124
2125 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
1da177e4
LT		 2126
2127 /*
2128 * fdata->intensity is a bit string that tells us what to do:
2129 * Bit 0: write record zero
2130 * Bit 1: write home address, currently not supported
2131 * Bit 2: invalidate tracks
2132 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2133 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2134 * Only some bit combinations do make sense.
2135 */
f9a28f7b
JBJ		 2136 if (fdata->intensity & 0x10) {
2137 r0_perm = 0;
2138 intensity = fdata->intensity & ~0x10;
2139 } else {
2140 r0_perm = 1;
2141 intensity = fdata->intensity;
2142 }
d42e1712 2143
18d6624e
SH		 2144 use_prefix = base_priv->features.feature[8] & 0x01;
2145
f9a28f7b 2146 switch (intensity) {
1da177e4
LT		 2147 case 0x00: /* Normal format */
2148 case 0x08: /* Normal format, use cdl. */
d42e1712 2149 cplength = 2 + (rpt*nr_tracks);
18d6624e
SH		 2150 if (use_prefix)
2151 datasize = sizeof(struct PFX_eckd_data) +
2152 sizeof(struct LO_eckd_data) +
2153 rpt * nr_tracks * sizeof(struct eckd_count);
2154 else
2155 datasize = sizeof(struct DE_eckd_data) +
2156 sizeof(struct LO_eckd_data) +
2157 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2158 break;
2159 case 0x01: /* Write record zero and format track. */
2160 case 0x09: /* Write record zero and format track, use cdl. */
d42e1712 2161 cplength = 2 + rpt * nr_tracks;
18d6624e
SH		 2162 if (use_prefix)
2163 datasize = sizeof(struct PFX_eckd_data) +
2164 sizeof(struct LO_eckd_data) +
2165 sizeof(struct eckd_count) +
2166 rpt * nr_tracks * sizeof(struct eckd_count);
2167 else
2168 datasize = sizeof(struct DE_eckd_data) +
2169 sizeof(struct LO_eckd_data) +
2170 sizeof(struct eckd_count) +
2171 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2172 break;
2173 case 0x04: /* Invalidate track. */
2174 case 0x0c: /* Invalidate track, use cdl. */
2175 cplength = 3;
18d6624e
SH		 2176 if (use_prefix)
2177 datasize = sizeof(struct PFX_eckd_data) +
2178 sizeof(struct LO_eckd_data) +
2179 sizeof(struct eckd_count);
2180 else
2181 datasize = sizeof(struct DE_eckd_data) +
2182 sizeof(struct LO_eckd_data) +
2183 sizeof(struct eckd_count);
1da177e4
LT		 2184 break;
2185 default:
d42e1712
SH		 2186 dev_warn(&startdev->cdev->dev,
2187 "An I/O control call used incorrect flags 0x%x\n",
2188 fdata->intensity);
1da177e4
LT		 2189 return ERR_PTR(-EINVAL);
2190 }
2191 /* Allocate the format ccw request. */
d42e1712
SH		 2192 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
2193 datasize, startdev);
1da177e4
LT		 2194 if (IS_ERR(fcp))
2195 return fcp;
2196
d42e1712 2197 start_priv->count++;
1da177e4
LT		 2198 data = fcp->data;
2199 ccw = fcp->cpaddr;
2200
f9a28f7b 2201 switch (intensity & ~0x08) {
1da177e4 2202 case 0x00: /* Normal format. */
18d6624e
SH		 2203 if (use_prefix) {
2204 prefix(ccw++, (struct PFX_eckd_data *) data,
2205 fdata->start_unit, fdata->stop_unit,
2206 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2207 /* grant subsystem permission to format R0 */
2208 if (r0_perm)
2209 ((struct PFX_eckd_data *)data)
2210 ->define_extent.ga_extended |= 0x04;
2211 data += sizeof(struct PFX_eckd_data);
2212 } else {
2213 define_extent(ccw++, (struct DE_eckd_data *) data,
2214 fdata->start_unit, fdata->stop_unit,
2215 DASD_ECKD_CCW_WRITE_CKD, startdev);
2216 /* grant subsystem permission to format R0 */
2217 if (r0_perm)
2218 ((struct DE_eckd_data *) data)
2219 ->ga_extended |= 0x04;
2220 data += sizeof(struct DE_eckd_data);
2221 }
1da177e4
LT		 2222 ccw[-1].flags |= CCW_FLAG_CC;
2223 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2224 fdata->start_unit, 0, rpt*nr_tracks,
2225 DASD_ECKD_CCW_WRITE_CKD, base,
1da177e4
LT		 2226 fdata->blksize);
2227 data += sizeof(struct LO_eckd_data);
2228 break;
2229 case 0x01: /* Write record zero + format track. */
18d6624e
SH		 2230 if (use_prefix) {
2231 prefix(ccw++, (struct PFX_eckd_data *) data,
2232 fdata->start_unit, fdata->stop_unit,
2233 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2234 base, startdev);
2235 data += sizeof(struct PFX_eckd_data);
2236 } else {
2237 define_extent(ccw++, (struct DE_eckd_data *) data,
2238 fdata->start_unit, fdata->stop_unit,
2239 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev);
2240 data += sizeof(struct DE_eckd_data);
2241 }
1da177e4
LT		 2242 ccw[-1].flags |= CCW_FLAG_CC;
2243 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2244 fdata->start_unit, 0, rpt * nr_tracks + 1,
2245 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2246 base->block->bp_block);
1da177e4
LT		 2247 data += sizeof(struct LO_eckd_data);
2248 break;
2249 case 0x04: /* Invalidate track. */
18d6624e
SH		 2250 if (use_prefix) {
2251 prefix(ccw++, (struct PFX_eckd_data *) data,
2252 fdata->start_unit, fdata->stop_unit,
2253 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2254 data += sizeof(struct PFX_eckd_data);
2255 } else {
2256 define_extent(ccw++, (struct DE_eckd_data *) data,
2257 fdata->start_unit, fdata->stop_unit,
2258 DASD_ECKD_CCW_WRITE_CKD, startdev);
2259 data += sizeof(struct DE_eckd_data);
2260 }
1da177e4
LT		 2261 ccw[-1].flags |= CCW_FLAG_CC;
2262 locate_record(ccw++, (struct LO_eckd_data *) data,
2263 fdata->start_unit, 0, 1,
d42e1712 2264 DASD_ECKD_CCW_WRITE_CKD, base, 8);
1da177e4
LT		 2265 data += sizeof(struct LO_eckd_data);
2266 break;
2267 }
d42e1712
SH		 2268
2269 for (j = 0; j < nr_tracks; j++) {
2270 /* calculate cylinder and head for the current track */
2271 set_ch_t(&address,
2272 (fdata->start_unit + j) /
2273 base_priv->rdc_data.trk_per_cyl,
2274 (fdata->start_unit + j) %
2275 base_priv->rdc_data.trk_per_cyl);
2276 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2277 ect = (struct eckd_count *) data;
2278 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2279 ect->cyl = address.cyl;
2280 ect->head = address.head;
d42e1712 2281 ect->record = 0;
1da177e4 2282 ect->kl = 0;
d42e1712 2283 ect->dl = 8;
1da177e4 2284 ccw[-1].flags |= CCW_FLAG_CC;
d42e1712 2285 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1da177e4
LT		 2286 ccw->flags = CCW_FLAG_SLI;
2287 ccw->count = 8;
2288 ccw->cda = (__u32)(addr_t) ect;
2289 ccw++;
2290 }
d42e1712
SH		 2291 if ((intensity & ~0x08) & 0x04) { /* erase track */
2292 ect = (struct eckd_count *) data;
2293 data += sizeof(struct eckd_count);
2294 ect->cyl = address.cyl;
2295 ect->head = address.head;
2296 ect->record = 1;
2297 ect->kl = 0;
2298 ect->dl = 0;
2299 ccw[-1].flags |= CCW_FLAG_CC;
2300 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2301 ccw->flags = CCW_FLAG_SLI;
2302 ccw->count = 8;
2303 ccw->cda = (__u32)(addr_t) ect;
2304 } else { /* write remaining records */
2305 for (i = 0; i < rpt; i++) {
2306 ect = (struct eckd_count *) data;
2307 data += sizeof(struct eckd_count);
2308 ect->cyl = address.cyl;
2309 ect->head = address.head;
2310 ect->record = i + 1;
2311 ect->kl = 0;
2312 ect->dl = fdata->blksize;
2313 /*
2314 * Check for special tracks 0-1
2315 * when formatting CDL
2316 */
2317 if ((intensity & 0x08) &&
2318 fdata->start_unit == 0) {
2319 if (i < 3) {
2320 ect->kl = 4;
2321 ect->dl = sizes_trk0[i] - 4;
2322 }
2323 }
2324 if ((intensity & 0x08) &&
2325 fdata->start_unit == 1) {
2326 ect->kl = 44;
2327 ect->dl = LABEL_SIZE - 44;
2328 }
2329 ccw[-1].flags |= CCW_FLAG_CC;
2330 if (i != 0 || j == 0)
2331 ccw->cmd_code =
2332 DASD_ECKD_CCW_WRITE_CKD;
2333 else
2334 ccw->cmd_code =
2335 DASD_ECKD_CCW_WRITE_CKD_MT;
2336 ccw->flags = CCW_FLAG_SLI;
2337 ccw->count = 8;
2338 ccw->cda = (__u32)(addr_t) ect;
2339 ccw++;
2340 }
2341 }
1da177e4 2342 }
d42e1712
SH		 2343
2344 fcp->startdev = startdev;
2345 fcp->memdev = startdev;
29b8dd9d 2346 fcp->basedev = base;
eb6e199b 2347 fcp->retries = 256;
d42e1712 2348 fcp->expires = startdev->default_expires * HZ;
1aae0560 2349 fcp->buildclk = get_tod_clock();
1da177e4 2350 fcp->status = DASD_CQR_FILLED;
d42e1712 2351
1da177e4
LT		 2352 return fcp;
2353}
2354
d42e1712
SH		 2355static int
2356dasd_eckd_format_device(struct dasd_device *base,
29b8dd9d 2357 struct format_data_t *fdata,
a94fa154 2358 int enable_pav)
d42e1712
SH		 2359{
2360 struct dasd_ccw_req *cqr, *n;
2361 struct dasd_block *block;
2362 struct dasd_eckd_private *private;
2363 struct list_head format_queue;
2364 struct dasd_device *device;
2365 int old_stop, format_step;
29b8dd9d 2366 int step, rc = 0, sleep_rc;
d42e1712
SH		 2367
2368 block = base->block;
2369 private = (struct dasd_eckd_private *) base->private;
2370
2371 /* Sanity checks. */
2372 if (fdata->start_unit >=
2373 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2374 dev_warn(&base->cdev->dev,
2375 "Start track number %u used in formatting is too big\n",
2376 fdata->start_unit);
2377 return -EINVAL;
2378 }
2379 if (fdata->stop_unit >=
2380 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2381 dev_warn(&base->cdev->dev,
2382 "Stop track number %u used in formatting is too big\n",
2383 fdata->stop_unit);
2384 return -EINVAL;
2385 }
2386 if (fdata->start_unit > fdata->stop_unit) {
2387 dev_warn(&base->cdev->dev,
2388 "Start track %u used in formatting exceeds end track\n",
2389 fdata->start_unit);
2390 return -EINVAL;
2391 }
2392 if (dasd_check_blocksize(fdata->blksize) != 0) {
2393 dev_warn(&base->cdev->dev,
2394 "The DASD cannot be formatted with block size %u\n",
2395 fdata->blksize);
2396 return -EINVAL;
2397 }
2398
2399 INIT_LIST_HEAD(&format_queue);
d42e1712 2400
29b8dd9d 2401 old_stop = fdata->stop_unit;
d42e1712
SH		 2402 while (fdata->start_unit <= 1) {
2403 fdata->stop_unit = fdata->start_unit;
a94fa154 2404 cqr = dasd_eckd_build_format(base, fdata, enable_pav);
d42e1712
SH		 2405 list_add(&cqr->blocklist, &format_queue);
2406
2407 fdata->stop_unit = old_stop;
2408 fdata->start_unit++;
2409
2410 if (fdata->start_unit > fdata->stop_unit)
2411 goto sleep;
2412 }
2413
2414retry:
2415 format_step = 255 / recs_per_track(&private->rdc_data, 0,
2416 fdata->blksize);
2417 while (fdata->start_unit <= old_stop) {
2418 step = fdata->stop_unit - fdata->start_unit + 1;
2419 if (step > format_step)
2420 fdata->stop_unit = fdata->start_unit + format_step - 1;
2421
a94fa154 2422 cqr = dasd_eckd_build_format(base, fdata, enable_pav);
d42e1712
SH		 2423 if (IS_ERR(cqr)) {
2424 if (PTR_ERR(cqr) == -ENOMEM) {
2425 /*
2426 * not enough memory available
2427 * go to out and start requests
2428 * retry after first requests were finished
2429 */
2430 fdata->stop_unit = old_stop;
2431 goto sleep;
2432 } else
2433 return PTR_ERR(cqr);
2434 }
2435 list_add(&cqr->blocklist, &format_queue);
2436
2437 fdata->start_unit = fdata->stop_unit + 1;
2438 fdata->stop_unit = old_stop;
2439 }
2440
2441sleep:
29b8dd9d 2442 sleep_rc = dasd_sleep_on_queue(&format_queue);
d42e1712
SH		 2443
2444 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2445 device = cqr->startdev;
2446 private = (struct dasd_eckd_private *) device->private;
2447 if (cqr->status == DASD_CQR_FAILED)
2448 rc = -EIO;
2449 list_del_init(&cqr->blocklist);
2450 dasd_sfree_request(cqr, device);
2451 private->count--;
2452 }
2453
29b8dd9d
SH		 2454 if (sleep_rc)
2455 return sleep_rc;
2456
d42e1712
SH		 2457 /*
2458 * in case of ENOMEM we need to retry after
2459 * first requests are finished
2460 */
2461 if (fdata->start_unit <= fdata->stop_unit)
2462 goto retry;
2463
2464 return rc;
2465}
2466
8e09f215 2467static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 2468{
a2ace466
HR		 2469 if (cqr->retries < 0) {
2470 cqr->status = DASD_CQR_FAILED;
2471 return;
2472 }
8e09f215
SW		 2473 cqr->status = DASD_CQR_FILLED;
2474 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2475 dasd_eckd_reset_ccw_to_base_io(cqr);
2476 cqr->startdev = cqr->block->base;
a4d26c6a 2477 cqr->lpm = cqr->block->base->path_data.opm;
1da177e4 2478 }
8e09f215 2479};
1da177e4
LT		 2480
2481static dasd_erp_fn_t
2482dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2483{
8e09f215 2484 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 2485 struct ccw_device *cdev = device->cdev;
2486
2487 switch (cdev->id.cu_type) {
2488 case 0x3990:
2489 case 0x2105:
2490 case 0x2107:
2491 case 0x1750:
2492 return dasd_3990_erp_action;
2493 case 0x9343:
2494 case 0x3880:
2495 default:
2496 return dasd_default_erp_action;
2497 }
2498}
2499
2500static dasd_erp_fn_t
2501dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2502{
2503 return dasd_default_erp_postaction;
2504}
2505
5a27e60d
SW		 2506static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2507 struct dasd_ccw_req *cqr,
2508 struct irb *irb)
8e09f215
SW		 2509{
2510 char mask;
f3eb5384 2511 char *sense = NULL;
501183f2 2512 struct dasd_eckd_private *private;
8e09f215 2513
501183f2 2514 private = (struct dasd_eckd_private *) device->private;
8e09f215
SW		 2515 /* first of all check for state change pending interrupt */
2516 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 2517 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 2518 /*
2519 * for alias only, not in offline processing
2520 * and only if not suspended
2521 */
501183f2 2522 if (!device->block && private->lcu &&
25e2cf1c 2523 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 2524 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2525 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 2526 /*
2527 * the state change could be caused by an alias
2528 * reassignment remove device from alias handling
2529 * to prevent new requests from being scheduled on
2530 * the wrong alias device
2531 */
2532 dasd_alias_remove_device(device);
2533
2534 /* schedule worker to reload device */
2535 dasd_reload_device(device);
2536 }
8e09f215
SW		 2537 dasd_generic_handle_state_change(device);
2538 return;
2539 }
2540
a5a0061f 2541 sense = dasd_get_sense(irb);
5a27e60d
SW		 2542 if (!sense)
2543 return;
2544
2545 /* summary unit check */
c7a29e56 2546 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 2547 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
8e09f215
SW		 2548 dasd_alias_handle_summary_unit_check(device, irb);
2549 return;
2550 }
2551
f60c768c 2552 /* service information message SIM */
5a27e60d 2553 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 2554 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2555 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 2556 return;
2557 }
2558
5a27e60d
SW		 2559 /* loss of device reservation is handled via base devices only
2560 * as alias devices may be used with several bases
2561 */
c7a29e56
SW		 2562 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
2563 (sense[7] == 0x3F) &&
5a27e60d
SW		 2564 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
2565 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
2566 if (device->features & DASD_FEATURE_FAILONSLCK)
2567 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
2568 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
2569 dev_err(&device->cdev->dev,
2570 "The device reservation was lost\n");
ada3df91 2571 }
5a27e60d 2572}
f3eb5384
SW		 2573
2574static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
2575 struct dasd_device *startdev,
8e09f215 2576 struct dasd_block *block,
f3eb5384
SW		 2577 struct request *req,
2578 sector_t first_rec,
2579 sector_t last_rec,
2580 sector_t first_trk,
2581 sector_t last_trk,
2582 unsigned int first_offs,
2583 unsigned int last_offs,
2584 unsigned int blk_per_trk,
2585 unsigned int blksize)
1da177e4
LT		 2586{
2587 struct dasd_eckd_private *private;
2588 unsigned long *idaws;
2589 struct LO_eckd_data *LO_data;
2590 struct dasd_ccw_req *cqr;
2591 struct ccw1 *ccw;
5705f702 2592 struct req_iterator iter;
7988613b 2593 struct bio_vec bv;
1da177e4 2594 char *dst;
f3eb5384 2595 unsigned int off;
1da177e4 2596 int count, cidaw, cplength, datasize;
f3eb5384 2597 sector_t recid;
1da177e4 2598 unsigned char cmd, rcmd;
8e09f215
SW		 2599 int use_prefix;
2600 struct dasd_device *basedev;
1da177e4 2601
8e09f215
SW		 2602 basedev = block->base;
2603 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 2604 if (rq_data_dir(req) == READ)
2605 cmd = DASD_ECKD_CCW_READ_MT;
2606 else if (rq_data_dir(req) == WRITE)
2607 cmd = DASD_ECKD_CCW_WRITE_MT;
2608 else
2609 return ERR_PTR(-EINVAL);
f3eb5384 2610
1da177e4
LT		 2611 /* Check struct bio and count the number of blocks for the request. */
2612 count = 0;
2613 cidaw = 0;
5705f702 2614 rq_for_each_segment(bv, req, iter) {
7988613b 2615 if (bv.bv_len & (blksize - 1))
6c92e699
JA		 2616 /* Eckd can only do full blocks. */
2617 return ERR_PTR(-EINVAL);
7988613b 2618 count += bv.bv_len >> (block->s2b_shift + 9);
7988613b
KO		 2619 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
2620 cidaw += bv.bv_len >> (block->s2b_shift + 9);
1da177e4
LT		 2621 }
2622 /* Paranoia. */
2623 if (count != last_rec - first_rec + 1)
2624 return ERR_PTR(-EINVAL);
8e09f215
SW		 2625
2626 /* use the prefix command if available */
2627 use_prefix = private->features.feature[8] & 0x01;
2628 if (use_prefix) {
2629 /* 1x prefix + number of blocks */
2630 cplength = 2 + count;
2631 /* 1x prefix + cidaws*sizeof(long) */
2632 datasize = sizeof(struct PFX_eckd_data) +
2633 sizeof(struct LO_eckd_data) +
2634 cidaw * sizeof(unsigned long);
2635 } else {
2636 /* 1x define extent + 1x locate record + number of blocks */
2637 cplength = 2 + count;
2638 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2639 datasize = sizeof(struct DE_eckd_data) +
2640 sizeof(struct LO_eckd_data) +
2641 cidaw * sizeof(unsigned long);
2642 }
1da177e4
LT		 2643 /* Find out the number of additional locate record ccws for cdl. */
2644 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
2645 if (last_rec >= 2*blk_per_trk)
2646 count = 2*blk_per_trk - first_rec;
2647 cplength += count;
2648 datasize += count*sizeof(struct LO_eckd_data);
2649 }
2650 /* Allocate the ccw request. */
68b781fe
SH		 2651 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2652 startdev);
1da177e4
LT		 2653 if (IS_ERR(cqr))
2654 return cqr;
2655 ccw = cqr->cpaddr;
8e09f215
SW		 2656 /* First ccw is define extent or prefix. */
2657 if (use_prefix) {
2658 if (prefix(ccw++, cqr->data, first_trk,
2659 last_trk, cmd, basedev, startdev) == -EAGAIN) {
2660 /* Clock not in sync and XRC is enabled.
2661 * Try again later.
2662 */
2663 dasd_sfree_request(cqr, startdev);
2664 return ERR_PTR(-EAGAIN);
2665 }
2666 idaws = (unsigned long *) (cqr->data +
2667 sizeof(struct PFX_eckd_data));
2668 } else {
2669 if (define_extent(ccw++, cqr->data, first_trk,
b38f27e8 2670 last_trk, cmd, basedev) == -EAGAIN) {
8e09f215
SW		 2671 /* Clock not in sync and XRC is enabled.
2672 * Try again later.
2673 */
2674 dasd_sfree_request(cqr, startdev);
2675 return ERR_PTR(-EAGAIN);
2676 }
2677 idaws = (unsigned long *) (cqr->data +
2678 sizeof(struct DE_eckd_data));
d54853ef 2679 }
1da177e4 2680 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 2681 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
2682 recid = first_rec;
2683 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
2684 /* Only standard blocks so there is just one locate record. */
2685 ccw[-1].flags |= CCW_FLAG_CC;
2686 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 2687 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 2688 }
5705f702 2689 rq_for_each_segment(bv, req, iter) {
7988613b 2690 dst = page_address(bv.bv_page) + bv.bv_offset;
1da177e4
LT		 2691 if (dasd_page_cache) {
2692 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 2693 GFP_DMA | __GFP_NOWARN);
1da177e4 2694 if (copy && rq_data_dir(req) == WRITE)
7988613b 2695 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
1da177e4 2696 if (copy)
7988613b 2697 dst = copy + bv.bv_offset;
1da177e4 2698 }
7988613b 2699 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 2700 sector_t trkid = recid;
2701 unsigned int recoffs = sector_div(trkid, blk_per_trk);
2702 rcmd = cmd;
2703 count = blksize;
2704 /* Locate record for cdl special block ? */
2705 if (private->uses_cdl && recid < 2*blk_per_trk) {
2706 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
2707 rcmd |= 0x8;
2708 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 2709 if (count < blksize &&
2710 rq_data_dir(req) == READ)
1da177e4
LT		 2711 memset(dst + count, 0xe5,
2712 blksize - count);
2713 }
2714 ccw[-1].flags |= CCW_FLAG_CC;
2715 locate_record(ccw++, LO_data++,
2716 trkid, recoffs + 1,
8e09f215 2717 1, rcmd, basedev, count);
1da177e4
LT		 2718 }
2719 /* Locate record for standard blocks ? */
2720 if (private->uses_cdl && recid == 2*blk_per_trk) {
2721 ccw[-1].flags |= CCW_FLAG_CC;
2722 locate_record(ccw++, LO_data++,
2723 trkid, recoffs + 1,
2724 last_rec - recid + 1,
8e09f215 2725 cmd, basedev, count);
1da177e4
LT		 2726 }
2727 /* Read/write ccw. */
2728 ccw[-1].flags |= CCW_FLAG_CC;
2729 ccw->cmd_code = rcmd;
2730 ccw->count = count;
2731 if (idal_is_needed(dst, blksize)) {
2732 ccw->cda = (__u32)(addr_t) idaws;
2733 ccw->flags = CCW_FLAG_IDA;
2734 idaws = idal_create_words(idaws, dst, blksize);
2735 } else {
2736 ccw->cda = (__u32)(addr_t) dst;
2737 ccw->flags = 0;
2738 }
2739 ccw++;
2740 dst += blksize;
2741 recid++;
2742 }
2743 }
13de227b
HS		 2744 if (blk_noretry_request(req) ||
2745 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 2746 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 2747 cqr->startdev = startdev;
2748 cqr->memdev = startdev;
2749 cqr->block = block;
7c8faa86 2750 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2751 cqr->lpm = startdev->path_data.ppm;
1f1ee9ad 2752 cqr->retries = startdev->default_retries;
1aae0560 2753 cqr->buildclk = get_tod_clock();
1da177e4
LT		 2754 cqr->status = DASD_CQR_FILLED;
2755 return cqr;
2756}
2757
f3eb5384
SW		 2758static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
2759 struct dasd_device *startdev,
2760 struct dasd_block *block,
2761 struct request *req,
2762 sector_t first_rec,
2763 sector_t last_rec,
2764 sector_t first_trk,
2765 sector_t last_trk,
2766 unsigned int first_offs,
2767 unsigned int last_offs,
2768 unsigned int blk_per_trk,
2769 unsigned int blksize)
2770{
f3eb5384
SW		 2771 unsigned long *idaws;
2772 struct dasd_ccw_req *cqr;
2773 struct ccw1 *ccw;
2774 struct req_iterator iter;
7988613b 2775 struct bio_vec bv;
f3eb5384
SW		 2776 char *dst, *idaw_dst;
2777 unsigned int cidaw, cplength, datasize;
2778 unsigned int tlf;
2779 sector_t recid;
2780 unsigned char cmd;
2781 struct dasd_device *basedev;
2782 unsigned int trkcount, count, count_to_trk_end;
2783 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2784 unsigned char new_track, end_idaw;
2785 sector_t trkid;
2786 unsigned int recoffs;
2787
2788 basedev = block->base;
f3eb5384
SW		 2789 if (rq_data_dir(req) == READ)
2790 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2791 else if (rq_data_dir(req) == WRITE)
2792 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2793 else
2794 return ERR_PTR(-EINVAL);
2795
2796 /* Track based I/O needs IDAWs for each page, and not just for
2797 * 64 bit addresses. We need additional idals for pages
2798 * that get filled from two tracks, so we use the number
2799 * of records as upper limit.
2800 */
2801 cidaw = last_rec - first_rec + 1;
2802 trkcount = last_trk - first_trk + 1;
2803
2804 /* 1x prefix + one read/write ccw per track */
2805 cplength = 1 + trkcount;
2806
2807 /* on 31-bit we need space for two 32 bit addresses per page
2808 * on 64-bit one 64 bit address
2809 */
2810 datasize = sizeof(struct PFX_eckd_data) +
2811 cidaw * sizeof(unsigned long long);
2812
2813 /* Allocate the ccw request. */
68b781fe
SH		 2814 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2815 startdev);
f3eb5384
SW		 2816 if (IS_ERR(cqr))
2817 return cqr;
2818 ccw = cqr->cpaddr;
2819 /* transfer length factor: how many bytes to read from the last track */
2820 if (first_trk == last_trk)
2821 tlf = last_offs - first_offs + 1;
2822 else
2823 tlf = last_offs + 1;
2824 tlf *= blksize;
2825
2826 if (prefix_LRE(ccw++, cqr->data, first_trk,
2827 last_trk, cmd, basedev, startdev,
2828 1 /* format */, first_offs + 1,
2829 trkcount, blksize,
2830 tlf) == -EAGAIN) {
2831 /* Clock not in sync and XRC is enabled.
2832 * Try again later.
2833 */
2834 dasd_sfree_request(cqr, startdev);
2835 return ERR_PTR(-EAGAIN);
2836 }
2837
2838 /*
2839 * The translation of request into ccw programs must meet the
2840 * following conditions:
2841 * - all idaws but the first and the last must address full pages
2842 * (or 2K blocks on 31-bit)
2843 * - the scope of a ccw and it's idal ends with the track boundaries
2844 */
2845 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2846 recid = first_rec;
2847 new_track = 1;
2848 end_idaw = 0;
2849 len_to_track_end = 0;
246ccea1 2850 idaw_dst = NULL;
f3eb5384
SW		 2851 idaw_len = 0;
2852 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 2853 dst = page_address(bv.bv_page) + bv.bv_offset;
2854 seg_len = bv.bv_len;
f3eb5384
SW		 2855 while (seg_len) {
2856 if (new_track) {
2857 trkid = recid;
2858 recoffs = sector_div(trkid, blk_per_trk);
2859 count_to_trk_end = blk_per_trk - recoffs;
2860 count = min((last_rec - recid + 1),
2861 (sector_t)count_to_trk_end);
2862 len_to_track_end = count * blksize;
2863 ccw[-1].flags |= CCW_FLAG_CC;
2864 ccw->cmd_code = cmd;
2865 ccw->count = len_to_track_end;
2866 ccw->cda = (__u32)(addr_t)idaws;
2867 ccw->flags = CCW_FLAG_IDA;
2868 ccw++;
2869 recid += count;
2870 new_track = 0;
52db45c3
SW		 2871 /* first idaw for a ccw may start anywhere */
2872 if (!idaw_dst)
2873 idaw_dst = dst;
f3eb5384 2874 }
52db45c3
SW		 2875 /* If we start a new idaw, we must make sure that it
2876 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2877 * If we continue an idaw, we must make sure that the
2878 * current segment begins where the so far accumulated
2879 * idaw ends
2880 */
52db45c3
SW		 2881 if (!idaw_dst) {
2882 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2883 dasd_sfree_request(cqr, startdev);
2884 return ERR_PTR(-ERANGE);
2885 } else
2886 idaw_dst = dst;
2887 }
f3eb5384
SW		 2888 if ((idaw_dst + idaw_len) != dst) {
2889 dasd_sfree_request(cqr, startdev);
2890 return ERR_PTR(-ERANGE);
2891 }
2892 part_len = min(seg_len, len_to_track_end);
2893 seg_len -= part_len;
2894 dst += part_len;
2895 idaw_len += part_len;
2896 len_to_track_end -= part_len;
2897 /* collected memory area ends on an IDA_BLOCK border,
2898 * -> create an idaw
2899 * idal_create_words will handle cases where idaw_len
2900 * is larger then IDA_BLOCK_SIZE
2901 */
2902 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2903 end_idaw = 1;
2904 /* We also need to end the idaw at track end */
2905 if (!len_to_track_end) {
2906 new_track = 1;
2907 end_idaw = 1;
2908 }
2909 if (end_idaw) {
2910 idaws = idal_create_words(idaws, idaw_dst,
2911 idaw_len);
246ccea1 2912 idaw_dst = NULL;
f3eb5384
SW		 2913 idaw_len = 0;
2914 end_idaw = 0;
2915 }
2916 }
2917 }
2918
2919 if (blk_noretry_request(req) ||
2920 block->base->features & DASD_FEATURE_FAILFAST)
2921 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2922 cqr->startdev = startdev;
2923 cqr->memdev = startdev;
2924 cqr->block = block;
7c8faa86 2925 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2926 cqr->lpm = startdev->path_data.ppm;
1f1ee9ad 2927 cqr->retries = startdev->default_retries;
1aae0560 2928 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 2929 cqr->status = DASD_CQR_FILLED;
2930 return cqr;
2931}
2932
2933static int prepare_itcw(struct itcw *itcw,
2934 unsigned int trk, unsigned int totrk, int cmd,
2935 struct dasd_device *basedev,
2936 struct dasd_device *startdev,
2937 unsigned int rec_on_trk, int count,
2938 unsigned int blksize,
2939 unsigned int total_data_size,
2940 unsigned int tlf,
2941 unsigned int blk_per_trk)
2942{
2943 struct PFX_eckd_data pfxdata;
2944 struct dasd_eckd_private *basepriv, *startpriv;
2945 struct DE_eckd_data *dedata;
2946 struct LRE_eckd_data *lredata;
2947 struct dcw *dcw;
2948
2949 u32 begcyl, endcyl;
2950 u16 heads, beghead, endhead;
2951 u8 pfx_cmd;
2952
2953 int rc = 0;
2954 int sector = 0;
2955 int dn, d;
2956
2957
2958 /* setup prefix data */
2959 basepriv = (struct dasd_eckd_private *) basedev->private;
2960 startpriv = (struct dasd_eckd_private *) startdev->private;
2961 dedata = &pfxdata.define_extent;
2962 lredata = &pfxdata.locate_record;
2963
2964 memset(&pfxdata, 0, sizeof(pfxdata));
2965 pfxdata.format = 1; /* PFX with LRE */
2966 pfxdata.base_address = basepriv->ned->unit_addr;
2967 pfxdata.base_lss = basepriv->ned->ID;
2968 pfxdata.validity.define_extent = 1;
2969
2970 /* private uid is kept up to date, conf_data may be outdated */
2971 if (startpriv->uid.type != UA_BASE_DEVICE) {
2972 pfxdata.validity.verify_base = 1;
2973 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2974 pfxdata.validity.hyper_pav = 1;
2975 }
2976
2977 switch (cmd) {
2978 case DASD_ECKD_CCW_READ_TRACK_DATA:
2979 dedata->mask.perm = 0x1;
2980 dedata->attributes.operation = basepriv->attrib.operation;
2981 dedata->blk_size = blksize;
2982 dedata->ga_extended |= 0x42;
2983 lredata->operation.orientation = 0x0;
2984 lredata->operation.operation = 0x0C;
2985 lredata->auxiliary.check_bytes = 0x01;
2986 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2987 break;
2988 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2989 dedata->mask.perm = 0x02;
2990 dedata->attributes.operation = basepriv->attrib.operation;
2991 dedata->blk_size = blksize;
2992 rc = check_XRC_on_prefix(&pfxdata, basedev);
2993 dedata->ga_extended |= 0x42;
2994 lredata->operation.orientation = 0x0;
2995 lredata->operation.operation = 0x3F;
2996 lredata->extended_operation = 0x23;
2997 lredata->auxiliary.check_bytes = 0x2;
2998 pfx_cmd = DASD_ECKD_CCW_PFX;
2999 break;
3000 default:
3001 DBF_DEV_EVENT(DBF_ERR, basedev,
3002 "prepare itcw, unknown opcode 0x%x", cmd);
3003 BUG();
3004 break;
3005 }
3006 if (rc)
3007 return rc;
3008
3009 dedata->attributes.mode = 0x3; /* ECKD */
3010
3011 heads = basepriv->rdc_data.trk_per_cyl;
3012 begcyl = trk / heads;
3013 beghead = trk % heads;
3014 endcyl = totrk / heads;
3015 endhead = totrk % heads;
3016
3017 /* check for sequential prestage - enhance cylinder range */
3018 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
3019 dedata->attributes.operation == DASD_SEQ_ACCESS) {
3020
3021 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
3022 endcyl += basepriv->attrib.nr_cyl;
3023 else
3024 endcyl = (basepriv->real_cyl - 1);
3025 }
3026
3027 set_ch_t(&dedata->beg_ext, begcyl, beghead);
3028 set_ch_t(&dedata->end_ext, endcyl, endhead);
3029
3030 dedata->ep_format = 0x20; /* records per track is valid */
3031 dedata->ep_rec_per_track = blk_per_trk;
3032
3033 if (rec_on_trk) {
3034 switch (basepriv->rdc_data.dev_type) {
3035 case 0x3390:
3036 dn = ceil_quot(blksize + 6, 232);
3037 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
3038 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
3039 break;
3040 case 0x3380:
3041 d = 7 + ceil_quot(blksize + 12, 32);
3042 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
3043 break;
3044 }
3045 }
3046
3047 lredata->auxiliary.length_valid = 1;
3048 lredata->auxiliary.length_scope = 1;
3049 lredata->auxiliary.imbedded_ccw_valid = 1;
3050 lredata->length = tlf;
3051 lredata->imbedded_ccw = cmd;
3052 lredata->count = count;
3053 lredata->sector = sector;
3054 set_ch_t(&lredata->seek_addr, begcyl, beghead);
3055 lredata->search_arg.cyl = lredata->seek_addr.cyl;
3056 lredata->search_arg.head = lredata->seek_addr.head;
3057 lredata->search_arg.record = rec_on_trk;
3058
3059 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
3060 &pfxdata, sizeof(pfxdata), total_data_size);
82a7b955 3061 return PTR_RET(dcw);
f3eb5384
SW		 3062}
3063
3064static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
3065 struct dasd_device *startdev,
3066 struct dasd_block *block,
3067 struct request *req,
3068 sector_t first_rec,
3069 sector_t last_rec,
3070 sector_t first_trk,
3071 sector_t last_trk,
3072 unsigned int first_offs,
3073 unsigned int last_offs,
3074 unsigned int blk_per_trk,
3075 unsigned int blksize)
3076{
f3eb5384
SW		 3077 struct dasd_ccw_req *cqr;
3078 struct req_iterator iter;
7988613b 3079 struct bio_vec bv;
f3eb5384
SW		 3080 char *dst;
3081 unsigned int trkcount, ctidaw;
3082 unsigned char cmd;
3083 struct dasd_device *basedev;
3084 unsigned int tlf;
3085 struct itcw *itcw;
3086 struct tidaw *last_tidaw = NULL;
3087 int itcw_op;
3088 size_t itcw_size;
ef19298b
SW		 3089 u8 tidaw_flags;
3090 unsigned int seg_len, part_len, len_to_track_end;
3091 unsigned char new_track;
3092 sector_t recid, trkid;
3093 unsigned int offs;
3094 unsigned int count, count_to_trk_end;
cd10502b 3095 int ret;
f3eb5384
SW		 3096
3097 basedev = block->base;
f3eb5384
SW		 3098 if (rq_data_dir(req) == READ) {
3099 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3100 itcw_op = ITCW_OP_READ;
3101 } else if (rq_data_dir(req) == WRITE) {
3102 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3103 itcw_op = ITCW_OP_WRITE;
3104 } else
3105 return ERR_PTR(-EINVAL);
3106
3107 /* trackbased I/O needs address all memory via TIDAWs,
3108 * not just for 64 bit addresses. This allows us to map
3109 * each segment directly to one tidaw.
ef19298b
SW		 3110 * In the case of write requests, additional tidaws may
3111 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 3112 */
3113 trkcount = last_trk - first_trk + 1;
3114 ctidaw = 0;
3115 rq_for_each_segment(bv, req, iter) {
3116 ++ctidaw;
3117 }
ef19298b
SW		 3118 if (rq_data_dir(req) == WRITE)
3119 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 3120
3121 /* Allocate the ccw request. */
3122 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 3123 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 3124 if (IS_ERR(cqr))
3125 return cqr;
3126
f3eb5384
SW		 3127 /* transfer length factor: how many bytes to read from the last track */
3128 if (first_trk == last_trk)
3129 tlf = last_offs - first_offs + 1;
3130 else
3131 tlf = last_offs + 1;
3132 tlf *= blksize;
3133
3134 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 3135 if (IS_ERR(itcw)) {
cd10502b
JL		 3136 ret = -EINVAL;
3137 goto out_error;
ef19298b 3138 }
f3eb5384 3139 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 3140 if (prepare_itcw(itcw, first_trk, last_trk,
3141 cmd, basedev, startdev,
3142 first_offs + 1,
3143 trkcount, blksize,
3144 (last_rec - first_rec + 1) * blksize,
3145 tlf, blk_per_trk) == -EAGAIN) {
3146 /* Clock not in sync and XRC is enabled.
3147 * Try again later.
3148 */
cd10502b
JL		 3149 ret = -EAGAIN;
3150 goto out_error;
f3eb5384 3151 }
d54cddb6 3152 len_to_track_end = 0;
f3eb5384
SW		 3153 /*
3154 * A tidaw can address 4k of memory, but must not cross page boundaries
3155 * We can let the block layer handle this by setting
3156 * blk_queue_segment_boundary to page boundaries and
3157 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 3158 * For write requests, a TIDAW must not cross track boundaries, because
3159 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 3160 */
ef19298b
SW		 3161 if (rq_data_dir(req) == WRITE) {
3162 new_track = 1;
3163 recid = first_rec;
3164 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3165 dst = page_address(bv.bv_page) + bv.bv_offset;
3166 seg_len = bv.bv_len;
ef19298b
SW		 3167 while (seg_len) {
3168 if (new_track) {
3169 trkid = recid;
3170 offs = sector_div(trkid, blk_per_trk);
3171 count_to_trk_end = blk_per_trk - offs;
3172 count = min((last_rec - recid + 1),
3173 (sector_t)count_to_trk_end);
3174 len_to_track_end = count * blksize;
3175 recid += count;
3176 new_track = 0;
3177 }
3178 part_len = min(seg_len, len_to_track_end);
3179 seg_len -= part_len;
3180 len_to_track_end -= part_len;
3181 /* We need to end the tidaw at track end */
3182 if (!len_to_track_end) {
3183 new_track = 1;
3184 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3185 } else
3186 tidaw_flags = 0;
3187 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3188 dst, part_len);
cd10502b
JL		 3189 if (IS_ERR(last_tidaw)) {
3190 ret = -EINVAL;
3191 goto out_error;
3192 }
ef19298b
SW		 3193 dst += part_len;
3194 }
3195 }
3196 } else {
3197 rq_for_each_segment(bv, req, iter) {
7988613b 3198 dst = page_address(bv.bv_page) + bv.bv_offset;
ef19298b 3199 last_tidaw = itcw_add_tidaw(itcw, 0x00,
7988613b 3200 dst, bv.bv_len);
cd10502b
JL		 3201 if (IS_ERR(last_tidaw)) {
3202 ret = -EINVAL;
3203 goto out_error;
3204 }
ef19298b 3205 }
f3eb5384 3206 }
ef19298b
SW		 3207 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3208 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 3209 itcw_finalize(itcw);
3210
3211 if (blk_noretry_request(req) ||
3212 block->base->features & DASD_FEATURE_FAILFAST)
3213 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 3214 cqr->cpmode = 1;
f3eb5384
SW		 3215 cqr->startdev = startdev;
3216 cqr->memdev = startdev;
3217 cqr->block = block;
7c8faa86 3218 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 3219 cqr->lpm = startdev->path_data.ppm;
1f1ee9ad 3220 cqr->retries = startdev->default_retries;
1aae0560 3221 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 3222 cqr->status = DASD_CQR_FILLED;
3223 return cqr;
cd10502b
JL		 3224out_error:
3225 dasd_sfree_request(cqr, startdev);
3226 return ERR_PTR(ret);
f3eb5384
SW		 3227}
3228
3229static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3230 struct dasd_block *block,
3231 struct request *req)
3232{
ef19298b 3233 int cmdrtd, cmdwtd;
f3eb5384 3234 int use_prefix;
ef19298b 3235 int fcx_multitrack;
45b44d76 3236 struct dasd_eckd_private *private;
f3eb5384
SW		 3237 struct dasd_device *basedev;
3238 sector_t first_rec, last_rec;
3239 sector_t first_trk, last_trk;
3240 unsigned int first_offs, last_offs;
3241 unsigned int blk_per_trk, blksize;
3242 int cdlspecial;
ef19298b 3243 unsigned int data_size;
f3eb5384
SW		 3244 struct dasd_ccw_req *cqr;
3245
3246 basedev = block->base;
3247 private = (struct dasd_eckd_private *) basedev->private;
3248
3249 /* Calculate number of blocks/records per track. */
3250 blksize = block->bp_block;
3251 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 3252 if (blk_per_trk == 0)
3253 return ERR_PTR(-EINVAL);
f3eb5384 3254 /* Calculate record id of first and last block. */
83096ebf 3255 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 3256 first_offs = sector_div(first_trk, blk_per_trk);
3257 last_rec = last_trk =
83096ebf 3258 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 3259 last_offs = sector_div(last_trk, blk_per_trk);
3260 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3261
ef19298b
SW		 3262 fcx_multitrack = private->features.feature[40] & 0x20;
3263 data_size = blk_rq_bytes(req);
26a35f37
SW		 3264 if (data_size % blksize)
3265 return ERR_PTR(-EINVAL);
ef19298b
SW		 3266 /* tpm write request add CBC data on each track boundary */
3267 if (rq_data_dir(req) == WRITE)
3268 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 3269
3270 /* is read track data and write track data in command mode supported? */
3271 cmdrtd = private->features.feature[9] & 0x20;
3272 cmdwtd = private->features.feature[12] & 0x40;
3273 use_prefix = private->features.feature[8] & 0x01;
3274
3275 cqr = NULL;
3276 if (cdlspecial || dasd_page_cache) {
3277 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 3278 } else if ((data_size <= private->fcx_max_data)
3279 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 3280 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3281 first_rec, last_rec,
3282 first_trk, last_trk,
3283 first_offs, last_offs,
3284 blk_per_trk, blksize);
ef19298b
SW		 3285 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3286 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3287 cqr = NULL;
3288 } else if (use_prefix &&
3289 (((rq_data_dir(req) == READ) && cmdrtd) ||
3290 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3291 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3292 first_rec, last_rec,
3293 first_trk, last_trk,
3294 first_offs, last_offs,
3295 blk_per_trk, blksize);
ef19298b
SW		 3296 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3297 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3298 cqr = NULL;
3299 }
3300 if (!cqr)
3301 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3302 first_rec, last_rec,
3303 first_trk, last_trk,
3304 first_offs, last_offs,
3305 blk_per_trk, blksize);
3306 return cqr;
3307}
3308
e4dbb0f2
SH		 3309static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
3310 struct dasd_block *block,
3311 struct request *req)
3312{
e4dbb0f2
SH		 3313 unsigned long *idaws;
3314 struct dasd_device *basedev;
3315 struct dasd_ccw_req *cqr;
3316 struct ccw1 *ccw;
3317 struct req_iterator iter;
7988613b 3318 struct bio_vec bv;
e4dbb0f2
SH		 3319 char *dst;
3320 unsigned char cmd;
3321 unsigned int trkcount;
3322 unsigned int seg_len, len_to_track_end;
3323 unsigned int first_offs;
3324 unsigned int cidaw, cplength, datasize;
558b9ef0
SW		 3325 sector_t first_trk, last_trk, sectors;
3326 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
e4dbb0f2
SH		 3327 unsigned int pfx_datasize;
3328
3329 /*
3330 * raw track access needs to be mutiple of 64k and on 64k boundary
558b9ef0
SW		 3331 * For read requests we can fix an incorrect alignment by padding
3332 * the request with dummy pages.
e4dbb0f2 3333 */
558b9ef0
SW		 3334 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
3335 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
3336 DASD_RAW_SECTORS_PER_TRACK;
3337 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
3338 DASD_RAW_SECTORS_PER_TRACK;
3339 basedev = block->base;
3340 if ((start_padding_sectors || end_padding_sectors) &&
3341 (rq_data_dir(req) == WRITE)) {
3342 DBF_DEV_EVENT(DBF_ERR, basedev,
3343 "raw write not track aligned (%lu,%lu) req %p",
3344 start_padding_sectors, end_padding_sectors, req);
e4dbb0f2
SH		 3345 cqr = ERR_PTR(-EINVAL);
3346 goto out;
3347 }
3348
3349 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3350 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3351 DASD_RAW_SECTORS_PER_TRACK;
3352 trkcount = last_trk - first_trk + 1;
3353 first_offs = 0;
e4dbb0f2
SH		 3354
3355 if (rq_data_dir(req) == READ)
3356 cmd = DASD_ECKD_CCW_READ_TRACK;
3357 else if (rq_data_dir(req) == WRITE)
3358 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3359 else {
3360 cqr = ERR_PTR(-EINVAL);
3361 goto out;
3362 }
3363
3364 /*
3365 * Raw track based I/O needs IDAWs for each page,
3366 * and not just for 64 bit addresses.
3367 */
3368 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3369
3370 /* 1x prefix + one read/write ccw per track */
3371 cplength = 1 + trkcount;
3372
3373 /*
3374 * struct PFX_eckd_data has up to 2 byte as extended parameter
3375 * this is needed for write full track and has to be mentioned
25985edc 3376 * separately
e4dbb0f2
SH		 3377 * add 8 instead of 2 to keep 8 byte boundary
3378 */
3379 pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
3380
3381 datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
3382
3383 /* Allocate the ccw request. */
3384 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3385 datasize, startdev);
3386 if (IS_ERR(cqr))
3387 goto out;
3388 ccw = cqr->cpaddr;
3389
3390 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
3391 basedev, startdev, 1 /* format */, first_offs + 1,
3392 trkcount, 0, 0) == -EAGAIN) {
3393 /* Clock not in sync and XRC is enabled.
3394 * Try again later.
3395 */
3396 dasd_sfree_request(cqr, startdev);
3397 cqr = ERR_PTR(-EAGAIN);
3398 goto out;
3399 }
3400
3401 idaws = (unsigned long *)(cqr->data + pfx_datasize);
e4dbb0f2 3402 len_to_track_end = 0;
558b9ef0
SW		 3403 if (start_padding_sectors) {
3404 ccw[-1].flags |= CCW_FLAG_CC;
3405 ccw->cmd_code = cmd;
3406 /* maximum 3390 track size */
3407 ccw->count = 57326;
3408 /* 64k map to one track */
3409 len_to_track_end = 65536 - start_padding_sectors * 512;
3410 ccw->cda = (__u32)(addr_t)idaws;
3411 ccw->flags |= CCW_FLAG_IDA;
3412 ccw->flags |= CCW_FLAG_SLI;
3413 ccw++;
3414 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
3415 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3416 }
e4dbb0f2 3417 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3418 dst = page_address(bv.bv_page) + bv.bv_offset;
3419 seg_len = bv.bv_len;
558b9ef0
SW		 3420 if (cmd == DASD_ECKD_CCW_READ_TRACK)
3421 memset(dst, 0, seg_len);
e4dbb0f2
SH		 3422 if (!len_to_track_end) {
3423 ccw[-1].flags |= CCW_FLAG_CC;
3424 ccw->cmd_code = cmd;
3425 /* maximum 3390 track size */
3426 ccw->count = 57326;
3427 /* 64k map to one track */
3428 len_to_track_end = 65536;
3429 ccw->cda = (__u32)(addr_t)idaws;
3430 ccw->flags |= CCW_FLAG_IDA;
3431 ccw->flags |= CCW_FLAG_SLI;
3432 ccw++;
3433 }
3434 len_to_track_end -= seg_len;
3435 idaws = idal_create_words(idaws, dst, seg_len);
3436 }
558b9ef0
SW		 3437 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
3438 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
e4dbb0f2
SH		 3439 if (blk_noretry_request(req) ||
3440 block->base->features & DASD_FEATURE_FAILFAST)
3441 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3442 cqr->startdev = startdev;
3443 cqr->memdev = startdev;
3444 cqr->block = block;
3445 cqr->expires = startdev->default_expires * HZ;
3446 cqr->lpm = startdev->path_data.ppm;
1f1ee9ad 3447 cqr->retries = startdev->default_retries;
1aae0560 3448 cqr->buildclk = get_tod_clock();
e4dbb0f2
SH		 3449 cqr->status = DASD_CQR_FILLED;
3450
3451 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
3452 cqr = NULL;
3453out:
3454 return cqr;
3455}
3456
3457
1da177e4
LT		 3458static int
3459dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3460{
3461 struct dasd_eckd_private *private;
3462 struct ccw1 *ccw;
5705f702 3463 struct req_iterator iter;
7988613b 3464 struct bio_vec bv;
1da177e4
LT		 3465 char *dst, *cda;
3466 unsigned int blksize, blk_per_trk, off;
3467 sector_t recid;
5705f702 3468 int status;
1da177e4
LT		 3469
3470 if (!dasd_page_cache)
3471 goto out;
8e09f215
SW		 3472 private = (struct dasd_eckd_private *) cqr->block->base->private;
3473 blksize = cqr->block->bp_block;
1da177e4 3474 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 3475 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 3476 ccw = cqr->cpaddr;
3477 /* Skip over define extent & locate record. */
3478 ccw++;
3479 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3480 ccw++;
5705f702 3481 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3482 dst = page_address(bv.bv_page) + bv.bv_offset;
3483 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 3484 /* Skip locate record. */
3485 if (private->uses_cdl && recid <= 2*blk_per_trk)
3486 ccw++;
3487 if (dst) {
3488 if (ccw->flags & CCW_FLAG_IDA)
3489 cda = *((char **)((addr_t) ccw->cda));
3490 else
3491 cda = (char *)((addr_t) ccw->cda);
3492 if (dst != cda) {
3493 if (rq_data_dir(req) == READ)
7988613b 3494 memcpy(dst, cda, bv.bv_len);
1da177e4
LT		 3495 kmem_cache_free(dasd_page_cache,
3496 (void *)((addr_t)cda & PAGE_MASK));
3497 }
3498 dst = NULL;
3499 }
3500 ccw++;
3501 recid++;
3502 }
3503 }
3504out:
3505 status = cqr->status == DASD_CQR_DONE;
8e09f215 3506 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3507 return status;
3508}
3509
8e09f215 3510/*
f3eb5384 3511 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 3512 *
3513 * Note that this is not enough to restart the cqr!
3514 * Either reset cqr->startdev as well (summary unit check handling)
3515 * or restart via separate cqr (as in ERP handling).
3516 */
3517void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3518{
3519 struct ccw1 *ccw;
3520 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 3521 struct tcw *tcw;
3522 struct tccb *tccb;
3523 struct dcw *dcw;
3524
3525 if (cqr->cpmode == 1) {
3526 tcw = cqr->cpaddr;
3527 tccb = tcw_get_tccb(tcw);
3528 dcw = (struct dcw *)&tccb->tca[0];
3529 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 3530 pfxdata->validity.verify_base = 0;
3531 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 3532 } else {
3533 ccw = cqr->cpaddr;
3534 pfxdata = cqr->data;
3535 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
3536 pfxdata->validity.verify_base = 0;
3537 pfxdata->validity.hyper_pav = 0;
3538 }
8e09f215
SW		 3539 }
3540}
3541
3542#define DASD_ECKD_CHANQ_MAX_SIZE 4
3543
3544static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
3545 struct dasd_block *block,
3546 struct request *req)
3547{
3548 struct dasd_eckd_private *private;
3549 struct dasd_device *startdev;
3550 unsigned long flags;
3551 struct dasd_ccw_req *cqr;
3552
3553 startdev = dasd_alias_get_start_dev(base);
3554 if (!startdev)
3555 startdev = base;
3556 private = (struct dasd_eckd_private *) startdev->private;
3557 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
3558 return ERR_PTR(-EBUSY);
3559
3560 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
3561 private->count++;
e4dbb0f2
SH		 3562 if ((base->features & DASD_FEATURE_USERAW))
3563 cqr = dasd_raw_build_cp(startdev, block, req);
3564 else
3565 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 3566 if (IS_ERR(cqr))
3567 private->count--;
3568 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
3569 return cqr;
3570}
3571
3572static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
3573 struct request *req)
3574{
3575 struct dasd_eckd_private *private;
3576 unsigned long flags;
3577
3578 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
3579 private = (struct dasd_eckd_private *) cqr->memdev->private;
3580 private->count--;
3581 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
3582 return dasd_eckd_free_cp(cqr, req);
3583}
3584
1da177e4
LT		 3585static int
3586dasd_eckd_fill_info(struct dasd_device * device,
3587 struct dasd_information2_t * info)
3588{
3589 struct dasd_eckd_private *private;
3590
3591 private = (struct dasd_eckd_private *) device->private;
3592 info->label_block = 2;
3593 info->FBA_layout = private->uses_cdl ? 0 : 1;
3594 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
3595 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
3596 memcpy(info->characteristics, &private->rdc_data,
3597 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 3598 info->confdata_size = min((unsigned long)private->conf_len,
3599 sizeof(info->configuration_data));
3600 memcpy(info->configuration_data, private->conf_data,
3601 info->confdata_size);
1da177e4
LT		 3602 return 0;
3603}
3604
3605/*
3606 * SECTION: ioctl functions for eckd devices.
3607 */
3608
3609/*
3610 * Release device ioctl.
138c014d 3611 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 3612 * (see dasd_eckd_reserve) device.
3613 */
3614static int
1107ccfb 3615dasd_eckd_release(struct dasd_device *device)
1da177e4 3616{
1da177e4
LT		 3617 struct dasd_ccw_req *cqr;
3618 int rc;
f3eb5384 3619 struct ccw1 *ccw;
f932bcea 3620 int useglobal;
1da177e4
LT		 3621
3622 if (!capable(CAP_SYS_ADMIN))
3623 return -EACCES;
3624
f932bcea 3625 useglobal = 0;
68b781fe 3626 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3627 if (IS_ERR(cqr)) {
f932bcea
SW		 3628 mutex_lock(&dasd_reserve_mutex);
3629 useglobal = 1;
3630 cqr = &dasd_reserve_req->cqr;
3631 memset(cqr, 0, sizeof(*cqr));
3632 memset(&dasd_reserve_req->ccw, 0,
3633 sizeof(dasd_reserve_req->ccw));
3634 cqr->cpaddr = &dasd_reserve_req->ccw;
3635 cqr->data = &dasd_reserve_req->data;
3636 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3637 }
f3eb5384
SW		 3638 ccw = cqr->cpaddr;
3639 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
3640 ccw->flags |= CCW_FLAG_SLI;
3641 ccw->count = 32;
3642 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3643 cqr->startdev = device;
3644 cqr->memdev = device;
1da177e4 3645 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3646 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3647 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 3648 cqr->expires = 2 * HZ;
1aae0560 3649 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3650 cqr->status = DASD_CQR_FILLED;
3651
3652 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3653 if (!rc)
3654 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3655
f932bcea
SW		 3656 if (useglobal)
3657 mutex_unlock(&dasd_reserve_mutex);
3658 else
3659 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3660 return rc;
3661}
3662
3663/*
3664 * Reserve device ioctl.
3665 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 3666 * 'timeout the request'. This leads to a terminate IO if
3667 * the interrupt is outstanding for a certain time.
1da177e4
LT		 3668 */
3669static int
1107ccfb 3670dasd_eckd_reserve(struct dasd_device *device)
1da177e4 3671{
1da177e4
LT		 3672 struct dasd_ccw_req *cqr;
3673 int rc;
f3eb5384 3674 struct ccw1 *ccw;
f932bcea 3675 int useglobal;
1da177e4
LT		 3676
3677 if (!capable(CAP_SYS_ADMIN))
3678 return -EACCES;
3679
f932bcea 3680 useglobal = 0;
68b781fe 3681 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3682 if (IS_ERR(cqr)) {
f932bcea
SW		 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;
1da177e4 3692 }
f3eb5384
SW		 3693 ccw = cqr->cpaddr;
3694 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
3695 ccw->flags |= CCW_FLAG_SLI;
3696 ccw->count = 32;
3697 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3698 cqr->startdev = device;
3699 cqr->memdev = device;
1da177e4 3700 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3701 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3702 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 3703 cqr->expires = 2 * HZ;
1aae0560 3704 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3705 cqr->status = DASD_CQR_FILLED;
3706
3707 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3708 if (!rc)
3709 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3710
f932bcea
SW		 3711 if (useglobal)
3712 mutex_unlock(&dasd_reserve_mutex);
3713 else
3714 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3715 return rc;
3716}
3717
3718/*
3719 * Steal lock ioctl - unconditional reserve device.
138c014d 3720 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 3721 * (unconditional reserve)
3722 */
3723static int
1107ccfb 3724dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 3725{
1da177e4
LT		 3726 struct dasd_ccw_req *cqr;
3727 int rc;
f3eb5384 3728 struct ccw1 *ccw;
f932bcea 3729 int useglobal;
1da177e4
LT		 3730
3731 if (!capable(CAP_SYS_ADMIN))
3732 return -EACCES;
3733
f932bcea 3734 useglobal = 0;
68b781fe 3735 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3736 if (IS_ERR(cqr)) {
f932bcea
SW		 3737 mutex_lock(&dasd_reserve_mutex);
3738 useglobal = 1;
3739 cqr = &dasd_reserve_req->cqr;
3740 memset(cqr, 0, sizeof(*cqr));
3741 memset(&dasd_reserve_req->ccw, 0,
3742 sizeof(dasd_reserve_req->ccw));
3743 cqr->cpaddr = &dasd_reserve_req->ccw;
3744 cqr->data = &dasd_reserve_req->data;
3745 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3746 }
f3eb5384
SW		 3747 ccw = cqr->cpaddr;
3748 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
3749 ccw->flags |= CCW_FLAG_SLI;
3750 ccw->count = 32;
3751 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3752 cqr->startdev = device;
3753 cqr->memdev = device;
1da177e4 3754 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3755 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3756 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 3757 cqr->expires = 2 * HZ;
1aae0560 3758 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3759 cqr->status = DASD_CQR_FILLED;
3760
3761 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3762 if (!rc)
3763 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3764
f932bcea
SW		 3765 if (useglobal)
3766 mutex_unlock(&dasd_reserve_mutex);
3767 else
3768 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3769 return rc;
3770}
3771
196339f1
SW		 3772/*
3773 * SNID - Sense Path Group ID
3774 * This ioctl may be used in situations where I/O is stalled due to
3775 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3776 * preallocated dasd_reserve_req.
3777 */
3778static int dasd_eckd_snid(struct dasd_device *device,
3779 void __user *argp)
3780{
3781 struct dasd_ccw_req *cqr;
3782 int rc;
3783 struct ccw1 *ccw;
3784 int useglobal;
3785 struct dasd_snid_ioctl_data usrparm;
3786
3787 if (!capable(CAP_SYS_ADMIN))
3788 return -EACCES;
3789
3790 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3791 return -EFAULT;
3792
3793 useglobal = 0;
3794 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
3795 sizeof(struct dasd_snid_data), device);
3796 if (IS_ERR(cqr)) {
3797 mutex_lock(&dasd_reserve_mutex);
3798 useglobal = 1;
3799 cqr = &dasd_reserve_req->cqr;
3800 memset(cqr, 0, sizeof(*cqr));
3801 memset(&dasd_reserve_req->ccw, 0,
3802 sizeof(dasd_reserve_req->ccw));
3803 cqr->cpaddr = &dasd_reserve_req->ccw;
3804 cqr->data = &dasd_reserve_req->data;
3805 cqr->magic = DASD_ECKD_MAGIC;
3806 }
3807 ccw = cqr->cpaddr;
3808 ccw->cmd_code = DASD_ECKD_CCW_SNID;
3809 ccw->flags |= CCW_FLAG_SLI;
3810 ccw->count = 12;
3811 ccw->cda = (__u32)(addr_t) cqr->data;
3812 cqr->startdev = device;
3813 cqr->memdev = device;
3814 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3815 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 3816 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 3817 cqr->retries = 5;
3818 cqr->expires = 10 * HZ;
1aae0560 3819 cqr->buildclk = get_tod_clock();
196339f1
SW		 3820 cqr->status = DASD_CQR_FILLED;
3821 cqr->lpm = usrparm.path_mask;
3822
3823 rc = dasd_sleep_on_immediatly(cqr);
3824 /* verify that I/O processing didn't modify the path mask */
3825 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
3826 rc = -EIO;
3827 if (!rc) {
3828 usrparm.data = *((struct dasd_snid_data *)cqr->data);
3829 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
3830 rc = -EFAULT;
3831 }
3832
3833 if (useglobal)
3834 mutex_unlock(&dasd_reserve_mutex);
3835 else
3836 dasd_sfree_request(cqr, cqr->memdev);
3837 return rc;
3838}
3839
1da177e4
LT		 3840/*
3841 * Read performance statistics
3842 */
3843static int
1107ccfb 3844dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 3845{
1da177e4
LT		 3846 struct dasd_psf_prssd_data *prssdp;
3847 struct dasd_rssd_perf_stats_t *stats;
3848 struct dasd_ccw_req *cqr;
3849 struct ccw1 *ccw;
3850 int rc;
3851
68b781fe 3852 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 3853 (sizeof(struct dasd_psf_prssd_data) +
3854 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 3855 device);
3856 if (IS_ERR(cqr)) {
fc19f381 3857 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 3858 "Could not allocate initialization request");
3859 return PTR_ERR(cqr);
3860 }
8e09f215
SW		 3861 cqr->startdev = device;
3862 cqr->memdev = device;
1da177e4 3863 cqr->retries = 0;
eb6e199b 3864 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 3865 cqr->expires = 10 * HZ;
3866
3867 /* Prepare for Read Subsystem Data */
3868 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 3869 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 3870 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 3871 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 3872 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
3873
3874 ccw = cqr->cpaddr;
3875 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 3876 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 3877 ccw->flags |= CCW_FLAG_CC;
3878 ccw->cda = (__u32)(addr_t) prssdp;
3879
3880 /* Read Subsystem Data - Performance Statistics */
3881 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 3882 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 3883
3884 ccw++;
3885 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 3886 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 3887 ccw->cda = (__u32)(addr_t) stats;
3888
1aae0560 3889 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3890 cqr->status = DASD_CQR_FILLED;
3891 rc = dasd_sleep_on(cqr);
3892 if (rc == 0) {
1da177e4
LT		 3893 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3894 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 3895 if (copy_to_user(argp, stats,
3896 sizeof(struct dasd_rssd_perf_stats_t)))
3897 rc = -EFAULT;
1da177e4 3898 }
8e09f215 3899 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3900 return rc;
3901}
3902
3903/*
3904 * Get attributes (cache operations)
3905 * Returnes the cache attributes used in Define Extend (DE).
3906 */
3907static int
1107ccfb 3908dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3909{
1107ccfb
CH		 3910 struct dasd_eckd_private *private =
3911 (struct dasd_eckd_private *)device->private;
3912 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 3913 int rc;
3914
3915 if (!capable(CAP_SYS_ADMIN))
3916 return -EACCES;
1107ccfb 3917 if (!argp)
1da177e4
LT		 3918 return -EINVAL;
3919
1107ccfb
CH		 3920 rc = 0;
3921 if (copy_to_user(argp, (long *) &attrib,
8e09f215 3922 sizeof(struct attrib_data_t)))
1107ccfb 3923 rc = -EFAULT;
1da177e4
LT		 3924
3925 return rc;
3926}
3927
3928/*
3929 * Set attributes (cache operations)
3930 * Stores the attributes for cache operation to be used in Define Extend (DE).
3931 */
3932static int
1107ccfb 3933dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3934{
1107ccfb
CH		 3935 struct dasd_eckd_private *private =
3936 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 3937 struct attrib_data_t attrib;
3938
3939 if (!capable(CAP_SYS_ADMIN))
3940 return -EACCES;
1107ccfb 3941 if (!argp)
1da177e4
LT		 3942 return -EINVAL;
3943
1107ccfb 3944 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 3945 return -EFAULT;
1da177e4
LT		 3946 private->attrib = attrib;
3947
fc19f381
SH		 3948 dev_info(&device->cdev->dev,
3949 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3950 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 3951 return 0;
3952}
3953
ab1d848f
NH		 3954/*
3955 * Issue syscall I/O to EMC Symmetrix array.
3956 * CCWs are PSF and RSSD
3957 */
3958static int dasd_symm_io(struct dasd_device *device, void __user *argp)
3959{
3960 struct dasd_symmio_parms usrparm;
3961 char *psf_data, *rssd_result;
3962 struct dasd_ccw_req *cqr;
3963 struct ccw1 *ccw;
52898025 3964 char psf0, psf1;
ab1d848f
NH		 3965 int rc;
3966
52898025
NH		 3967 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
3968 return -EACCES;
3969 psf0 = psf1 = 0;
3970
ab1d848f
NH		 3971 /* Copy parms from caller */
3972 rc = -EFAULT;
3973 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3974 goto out;
f8b06859
HC		 3975 if (is_compat_task() || sizeof(long) == 4) {
3976 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 3977 rc = -EINVAL;
f8b06859
HC		 3978 if ((usrparm.psf_data >> 32) != 0)
3979 goto out;
3980 if ((usrparm.rssd_result >> 32) != 0)
3981 goto out;
3982 usrparm.psf_data &= 0x7fffffffULL;
3983 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 3984 }
ab1d848f
NH		 3985 /* alloc I/O data area */
3986 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
3987 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
3988 if (!psf_data || !rssd_result) {
3989 rc = -ENOMEM;
3990 goto out_free;
3991 }
3992
3993 /* get syscall header from user space */
3994 rc = -EFAULT;
3995 if (copy_from_user(psf_data,
3996 (void __user *)(unsigned long) usrparm.psf_data,
3997 usrparm.psf_data_len))
3998 goto out_free;
52898025
NH		 3999 psf0 = psf_data[0];
4000 psf1 = psf_data[1];
ab1d848f
NH		 4001
4002 /* setup CCWs for PSF + RSSD */
68b781fe 4003 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 4004 if (IS_ERR(cqr)) {
fc19f381 4005 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 4006 "Could not allocate initialization request");
4007 rc = PTR_ERR(cqr);
4008 goto out_free;
4009 }
4010
4011 cqr->startdev = device;
4012 cqr->memdev = device;
4013 cqr->retries = 3;
4014 cqr->expires = 10 * HZ;
1aae0560 4015 cqr->buildclk = get_tod_clock();
ab1d848f
NH		 4016 cqr->status = DASD_CQR_FILLED;
4017
4018 /* Build the ccws */
4019 ccw = cqr->cpaddr;
4020
4021 /* PSF ccw */
4022 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4023 ccw->count = usrparm.psf_data_len;
4024 ccw->flags |= CCW_FLAG_CC;
4025 ccw->cda = (__u32)(addr_t) psf_data;
4026
4027 ccw++;
4028
4029 /* RSSD ccw */
4030 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4031 ccw->count = usrparm.rssd_result_len;
4032 ccw->flags = CCW_FLAG_SLI ;
4033 ccw->cda = (__u32)(addr_t) rssd_result;
4034
4035 rc = dasd_sleep_on(cqr);
4036 if (rc)
4037 goto out_sfree;
4038
4039 rc = -EFAULT;
4040 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
4041 rssd_result, usrparm.rssd_result_len))
4042 goto out_sfree;
4043 rc = 0;
4044
4045out_sfree:
4046 dasd_sfree_request(cqr, cqr->memdev);
4047out_free:
4048 kfree(rssd_result);
4049 kfree(psf_data);
4050out:
52898025
NH		 4051 DBF_DEV_EVENT(DBF_WARNING, device,
4052 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4053 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 4054 return rc;
4055}
4056
1107ccfb 4057static int
8e09f215 4058dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 4059{
8e09f215
SW		 4060 struct dasd_device *device = block->base;
4061
1107ccfb
CH		 4062 switch (cmd) {
4063 case BIODASDGATTR:
4064 return dasd_eckd_get_attrib(device, argp);
4065 case BIODASDSATTR:
4066 return dasd_eckd_set_attrib(device, argp);
4067 case BIODASDPSRD:
4068 return dasd_eckd_performance(device, argp);
4069 case BIODASDRLSE:
4070 return dasd_eckd_release(device);
4071 case BIODASDRSRV:
4072 return dasd_eckd_reserve(device);
4073 case BIODASDSLCK:
4074 return dasd_eckd_steal_lock(device);
196339f1
SW		 4075 case BIODASDSNID:
4076 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 4077 case BIODASDSYMMIO:
4078 return dasd_symm_io(device, argp);
1107ccfb 4079 default:
6b79d14e 4080 return -ENOTTY;
1107ccfb
CH		 4081 }
4082}
4083
445b5b49
HH		 4084/*
4085 * Dump the range of CCWs into 'page' buffer
4086 * and return number of printed chars.
4087 */
4d284cac 4088static int
445b5b49
HH		 4089dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
4090{
4091 int len, count;
4092 char *datap;
4093
4094 len = 0;
4095 while (from <= to) {
773bab4a 4096 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4097 " CCW %p: %08X %08X DAT:",
4098 from, ((int *) from)[0], ((int *) from)[1]);
4099
4100 /* get pointer to data (consider IDALs) */
4101 if (from->flags & CCW_FLAG_IDA)
4102 datap = (char *) *((addr_t *) (addr_t) from->cda);
4103 else
4104 datap = (char *) ((addr_t) from->cda);
4105
4106 /* dump data (max 32 bytes) */
4107 for (count = 0; count < from->count && count < 32; count++) {
4108 if (count % 8 == 0) len += sprintf(page + len, " ");
4109 if (count % 4 == 0) len += sprintf(page + len, " ");
4110 len += sprintf(page + len, "%02x", datap[count]);
4111 }
4112 len += sprintf(page + len, "\n");
4113 from++;
4114 }
4115 return len;
4116}
4117
fc19f381 4118static void
aeec92ca
SH		 4119dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4120 char *reason)
fc19f381
SH		 4121{
4122 u64 *sense;
a5a0061f 4123 u64 *stat;
aeec92ca
SH		 4124
4125 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 4126 stat = (u64 *) &irb->scsw;
fc19f381 4127 if (sense) {
a5a0061f
SW		 4128 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4129 "%016llx %016llx %016llx %016llx",
4130 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 4131 sense[0], sense[1], sense[2], sense[3]);
fc19f381 4132 } else {
a5a0061f
SW		 4133 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4134 reason, *stat, *((u32 *) (stat + 1)),
4135 "NO VALID SENSE");
fc19f381
SH		 4136 }
4137}
4138
1da177e4
LT		 4139/*
4140 * Print sense data and related channel program.
4141 * Parts are printed because printk buffer is only 1024 bytes.
4142 */
f3eb5384 4143static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 4144 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 4145{
4146 char *page;
445b5b49
HH		 4147 struct ccw1 *first, *last, *fail, *from, *to;
4148 int len, sl, sct;
1da177e4
LT		 4149
4150 page = (char *) get_zeroed_page(GFP_ATOMIC);
4151 if (page == NULL) {
fc19f381
SH		 4152 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4153 "No memory to dump sense data\n");
1da177e4
LT		 4154 return;
4155 }
445b5b49 4156 /* dump the sense data */
773bab4a 4157 len = sprintf(page, PRINTK_HEADER
1da177e4 4158 " I/O status report for device %s:\n",
2a0217d5 4159 dev_name(&device->cdev->dev));
773bab4a 4160 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4161 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4162 "CS:%02X RC:%d\n",
4163 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4164 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4165 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4166 req ? req->intrc : 0);
773bab4a 4167 len += sprintf(page + len, PRINTK_HEADER
1da177e4 4168 " device %s: Failing CCW: %p\n",
2a0217d5 4169 dev_name(&device->cdev->dev),
23d805b6 4170 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 4171 if (irb->esw.esw0.erw.cons) {
4172 for (sl = 0; sl < 4; sl++) {
773bab4a 4173 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 4174 " Sense(hex) %2d-%2d:",
4175 (8 * sl), ((8 * sl) + 7));
4176
4177 for (sct = 0; sct < 8; sct++) {
4178 len += sprintf(page + len, " %02x",
4179 irb->ecw[8 * sl + sct]);
4180 }
4181 len += sprintf(page + len, "\n");
4182 }
4183
4184 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4185 /* 24 Byte Sense Data */
773bab4a 4186 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4187 " 24 Byte: %x MSG %x, "
4188 "%s MSGb to SYSOP\n",
4189 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4190 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 4191 } else {
4192 /* 32 Byte Sense Data */
773bab4a 4193 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4194 " 32 Byte: Format: %x "
4195 "Exception class %x\n",
4196 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 4197 }
4198 } else {
773bab4a 4199 sprintf(page + len, PRINTK_HEADER
445b5b49 4200 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 4201 }
773bab4a 4202 printk(KERN_ERR "%s", page);
445b5b49 4203
8e09f215
SW		 4204 if (req) {
4205 /* req == NULL for unsolicited interrupts */
4206 /* dump the Channel Program (max 140 Bytes per line) */
4207 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4208 first = req->cpaddr;
4209 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4210 to = min(first + 6, last);
773bab4a 4211 len = sprintf(page, PRINTK_HEADER
8e09f215
SW		 4212 " Related CP in req: %p\n", req);
4213 dasd_eckd_dump_ccw_range(first, to, page + len);
773bab4a 4214 printk(KERN_ERR "%s", page);
1da177e4 4215
8e09f215
SW		 4216 /* print failing CCW area (maximum 4) */
4217 /* scsw->cda is either valid or zero */
4218 len = 0;
4219 from = ++to;
23d805b6
PO		 4220 fail = (struct ccw1 *)(addr_t)
4221 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 4222 if (from < fail - 2) {
4223 from = fail - 2; /* there is a gap - print header */
773bab4a 4224 len += sprintf(page, PRINTK_HEADER "......\n");
8e09f215
SW		 4225 }
4226 to = min(fail + 1, last);
4227 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4228
4229 /* print last CCWs (maximum 2) */
4230 from = max(from, ++to);
4231 if (from < last - 1) {
4232 from = last - 1; /* there is a gap - print header */
773bab4a 4233 len += sprintf(page + len, PRINTK_HEADER "......\n");
8e09f215
SW		 4234 }
4235 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4236 if (len > 0)
773bab4a 4237 printk(KERN_ERR "%s", page);
1da177e4 4238 }
1da177e4
LT		 4239 free_page((unsigned long) page);
4240}
4241
f3eb5384
SW		 4242
4243/*
4244 * Print sense data from a tcw.
4245 */
4246static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4247 struct dasd_ccw_req *req, struct irb *irb)
4248{
4249 char *page;
4250 int len, sl, sct, residual;
f3eb5384 4251 struct tsb *tsb;
ef19298b 4252 u8 *sense, *rcq;
f3eb5384
SW		 4253
4254 page = (char *) get_zeroed_page(GFP_ATOMIC);
4255 if (page == NULL) {
fc19f381 4256 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 4257 "No memory to dump sense data");
4258 return;
4259 }
4260 /* dump the sense data */
773bab4a 4261 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 4262 " I/O status report for device %s:\n",
4263 dev_name(&device->cdev->dev));
773bab4a 4264 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4265 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4266 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4267 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4268 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4269 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4270 irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
4271 req ? req->intrc : 0);
773bab4a 4272 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4273 " device %s: Failing TCW: %p\n",
4274 dev_name(&device->cdev->dev),
4275 (void *) (addr_t) irb->scsw.tm.tcw);
4276
4277 tsb = NULL;
4278 sense = NULL;
a5a0061f 4279 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 4280 tsb = tcw_get_tsb(
4281 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4282
b8fde722 4283 if (tsb) {
773bab4a 4284 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4285 " tsb->length %d\n", tsb->length);
773bab4a 4286 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4287 " tsb->flags %x\n", tsb->flags);
773bab4a 4288 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4289 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 4290 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4291 " tsb->count %d\n", tsb->count);
4292 residual = tsb->count - 28;
773bab4a 4293 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4294 " residual %d\n", residual);
4295
4296 switch (tsb->flags & 0x07) {
4297 case 1: /* tsa_iostat */
773bab4a 4298 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4299 " tsb->tsa.iostat.dev_time %d\n",
4300 tsb->tsa.iostat.dev_time);
773bab4a 4301 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4302 " tsb->tsa.iostat.def_time %d\n",
4303 tsb->tsa.iostat.def_time);
773bab4a 4304 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4305 " tsb->tsa.iostat.queue_time %d\n",
4306 tsb->tsa.iostat.queue_time);
773bab4a 4307 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4308 " tsb->tsa.iostat.dev_busy_time %d\n",
4309 tsb->tsa.iostat.dev_busy_time);
773bab4a 4310 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4311 " tsb->tsa.iostat.dev_act_time %d\n",
4312 tsb->tsa.iostat.dev_act_time);
4313 sense = tsb->tsa.iostat.sense;
4314 break;
4315 case 2: /* ts_ddpc */
773bab4a 4316 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4317 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 4318 for (sl = 0; sl < 2; sl++) {
773bab4a 4319 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 4320 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4321 (8 * sl), ((8 * sl) + 7));
4322 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 4323 for (sct = 0; sct < 8; sct++) {
4324 len += sprintf(page + len, " %02x",
ef19298b 4325 rcq[8 * sl + sct]);
f3eb5384
SW		 4326 }
4327 len += sprintf(page + len, "\n");
4328 }
4329 sense = tsb->tsa.ddpc.sense;
4330 break;
4331 case 3: /* tsa_intrg */
773bab4a
SO		 4332 len += sprintf(page + len, PRINTK_HEADER
4333 " tsb->tsa.intrg.: not supportet yet\n");
f3eb5384
SW		 4334 break;
4335 }
4336
4337 if (sense) {
4338 for (sl = 0; sl < 4; sl++) {
773bab4a 4339 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4340 " Sense(hex) %2d-%2d:",
4341 (8 * sl), ((8 * sl) + 7));
4342 for (sct = 0; sct < 8; sct++) {
4343 len += sprintf(page + len, " %02x",
4344 sense[8 * sl + sct]);
4345 }
4346 len += sprintf(page + len, "\n");
4347 }
4348
4349 if (sense[27] & DASD_SENSE_BIT_0) {
4350 /* 24 Byte Sense Data */
773bab4a 4351 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4352 " 24 Byte: %x MSG %x, "
4353 "%s MSGb to SYSOP\n",
4354 sense[7] >> 4, sense[7] & 0x0f,
4355 sense[1] & 0x10 ? "" : "no");
4356 } else {
4357 /* 32 Byte Sense Data */
773bab4a 4358 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4359 " 32 Byte: Format: %x "
4360 "Exception class %x\n",
4361 sense[6] & 0x0f, sense[22] >> 4);
4362 }
4363 } else {
773bab4a 4364 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4365 " SORRY - NO VALID SENSE AVAILABLE\n");
4366 }
4367 } else {
773bab4a 4368 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4369 " SORRY - NO TSB DATA AVAILABLE\n");
4370 }
773bab4a 4371 printk(KERN_ERR "%s", page);
f3eb5384
SW		 4372 free_page((unsigned long) page);
4373}
4374
4375static void dasd_eckd_dump_sense(struct dasd_device *device,
4376 struct dasd_ccw_req *req, struct irb *irb)
4377{
a5a0061f 4378 if (scsw_is_tm(&irb->scsw))
f3eb5384
SW		 4379 dasd_eckd_dump_sense_tcw(device, req, irb);
4380 else
4381 dasd_eckd_dump_sense_ccw(device, req, irb);
4382}
4383
501183f2 4384static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 4385{
4386 /*
4387 * the device should be disconnected from our LCU structure
4388 * on restore we will reconnect it and reread LCU specific
4389 * information like PAV support that might have changed
4390 */
4391 dasd_alias_remove_device(device);
4392 dasd_alias_disconnect_device_from_lcu(device);
4393
4394 return 0;
4395}
4396
501183f2 4397static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122
SH		 4398{
4399 struct dasd_eckd_private *private;
6fca97a9 4400 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 4401 int rc;
d41dd122 4402 struct dasd_uid temp_uid;
a7602f6c 4403 unsigned long flags;
ea4da6ea 4404 unsigned long cqr_flags = 0;
d41dd122 4405
d41dd122
SH		 4406 private = (struct dasd_eckd_private *) device->private;
4407
4408 /* Read Configuration Data */
55d3a85c 4409 dasd_eckd_read_conf(device);
d41dd122 4410
2dedf0d9
SH		 4411 dasd_eckd_get_uid(device, &temp_uid);
4412 /* Generate device unique id */
4413 rc = dasd_eckd_generate_uid(device);
4414 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 4415 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 4416 dev_err(&device->cdev->dev, "The UID of the DASD has "
4417 "changed\n");
2dedf0d9 4418 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4419 if (rc)
4420 goto out_err;
d41dd122
SH		 4421
4422 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 4423 rc = dasd_alias_make_device_known_to_lcu(device);
4424 if (rc)
4425 return rc;
ea4da6ea
SH		 4426
4427 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4428 dasd_eckd_validate_server(device, cqr_flags);
f4ac1d02
SW		 4429
4430 /* RE-Read Configuration Data */
55d3a85c 4431 dasd_eckd_read_conf(device);
d41dd122
SH		 4432
4433 /* Read Feature Codes */
68d1e5f0 4434 dasd_eckd_read_features(device);
d41dd122
SH		 4435
4436 /* Read Device Characteristics */
68b781fe 4437 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 4438 &temp_rdc_data, 64);
d41dd122 4439 if (rc) {
b8ed5dd5
SH		 4440 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4441 "Read device characteristic failed, rc=%d", rc);
d41dd122
SH		 4442 goto out_err;
4443 }
a7602f6c 4444 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 4445 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 4446 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4447
4448 /* add device to alias management */
4449 dasd_alias_add_device(device);
4450
4451 return 0;
4452
4453out_err:
e6125fba 4454 return -1;
d41dd122
SH		 4455}
4456
501183f2
SH		 4457static int dasd_eckd_reload_device(struct dasd_device *device)
4458{
4459 struct dasd_eckd_private *private;
4460 int rc, old_base;
2dedf0d9
SH		 4461 char print_uid[60];
4462 struct dasd_uid uid;
4463 unsigned long flags;
501183f2
SH		 4464
4465 private = (struct dasd_eckd_private *) device->private;
2dedf0d9
SH		 4466
4467 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 4468 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 4469 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4470
501183f2
SH		 4471 /* Read Configuration Data */
4472 rc = dasd_eckd_read_conf(device);
4473 if (rc)
4474 goto out_err;
4475
2dedf0d9 4476 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 4477 if (rc)
4478 goto out_err;
501183f2
SH		 4479 /*
4480 * update unit address configuration and
4481 * add device to alias management
4482 */
4483 dasd_alias_update_add_device(device);
4484
2dedf0d9
SH		 4485 dasd_eckd_get_uid(device, &uid);
4486
4487 if (old_base != uid.base_unit_addr) {
4488 if (strlen(uid.vduit) > 0)
4489 snprintf(print_uid, sizeof(print_uid),
4490 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
4491 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 4492 else
2dedf0d9
SH		 4493 snprintf(print_uid, sizeof(print_uid),
4494 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
4495 uid.ssid, uid.base_unit_addr);
501183f2
SH		 4496
4497 dev_info(&device->cdev->dev,
4498 "An Alias device was reassigned to a new base device "
2dedf0d9 4499 "with UID: %s\n", print_uid);
501183f2
SH		 4500 }
4501 return 0;
4502
4503out_err:
4504 return -1;
4505}
4506
5db8440c
SH		 4507static int dasd_eckd_read_message_buffer(struct dasd_device *device,
4508 struct dasd_rssd_messages *messages,
4509 __u8 lpum)
4510{
4511 struct dasd_rssd_messages *message_buf;
4512 struct dasd_psf_prssd_data *prssdp;
4513 struct dasd_eckd_private *private;
4514 struct dasd_ccw_req *cqr;
4515 struct ccw1 *ccw;
4516 int rc;
4517
4518 private = (struct dasd_eckd_private *) device->private;
4519 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
4520 (sizeof(struct dasd_psf_prssd_data) +
4521 sizeof(struct dasd_rssd_messages)),
4522 device);
4523 if (IS_ERR(cqr)) {
4524 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
4525 "Could not allocate read message buffer request");
4526 return PTR_ERR(cqr);
4527 }
4528
4529 cqr->startdev = device;
4530 cqr->memdev = device;
4531 cqr->block = NULL;
4532 cqr->retries = 256;
4533 cqr->expires = 10 * HZ;
4534
4535 /* we need to check for messages on exactly this path */
4536 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
4537 cqr->lpm = lpum;
4538
4539 /* Prepare for Read Subsystem Data */
4540 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4541 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
4542 prssdp->order = PSF_ORDER_PRSSD;
4543 prssdp->suborder = 0x03; /* Message Buffer */
4544 /* all other bytes of prssdp must be zero */
4545
4546 ccw = cqr->cpaddr;
4547 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4548 ccw->count = sizeof(struct dasd_psf_prssd_data);
4549 ccw->flags |= CCW_FLAG_CC;
4550 ccw->flags |= CCW_FLAG_SLI;
4551 ccw->cda = (__u32)(addr_t) prssdp;
4552
4553 /* Read Subsystem Data - message buffer */
4554 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
4555 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
4556
4557 ccw++;
4558 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4559 ccw->count = sizeof(struct dasd_rssd_messages);
4560 ccw->flags |= CCW_FLAG_SLI;
4561 ccw->cda = (__u32)(addr_t) message_buf;
4562
4563 cqr->buildclk = get_tod_clock();
4564 cqr->status = DASD_CQR_FILLED;
4565 rc = dasd_sleep_on_immediatly(cqr);
4566 if (rc == 0) {
4567 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4568 message_buf = (struct dasd_rssd_messages *)
4569 (prssdp + 1);
4570 memcpy(messages, message_buf,
4571 sizeof(struct dasd_rssd_messages));
4572 } else
4573 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4574 "Reading messages failed with rc=%d\n"
4575 , rc);
4576 dasd_sfree_request(cqr, cqr->memdev);
4577 return rc;
4578}
4579
4580/*
4581 * Perform Subsystem Function - CUIR response
4582 */
4583static int
4584dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
4585 __u32 message_id,
4586 struct channel_path_desc *desc,
4587 struct subchannel_id sch_id)
4588{
4589 struct dasd_psf_cuir_response *psf_cuir;
4590 struct dasd_ccw_req *cqr;
4591 struct ccw1 *ccw;
4592 int rc;
4593
4594 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
4595 sizeof(struct dasd_psf_cuir_response),
4596 device);
4597
4598 if (IS_ERR(cqr)) {
4599 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4600 "Could not allocate PSF-CUIR request");
4601 return PTR_ERR(cqr);
4602 }
4603
4604 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
4605 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
4606 psf_cuir->cc = response;
4607 if (desc)
4608 psf_cuir->chpid = desc->chpid;
4609 psf_cuir->message_id = message_id;
4610 psf_cuir->cssid = sch_id.cssid;
4611 psf_cuir->ssid = sch_id.ssid;
4612
4613 ccw = cqr->cpaddr;
4614 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4615 ccw->cda = (__u32)(addr_t)psf_cuir;
4616 ccw->count = sizeof(struct dasd_psf_cuir_response);
4617
4618 cqr->startdev = device;
4619 cqr->memdev = device;
4620 cqr->block = NULL;
4621 cqr->retries = 256;
4622 cqr->expires = 10*HZ;
4623 cqr->buildclk = get_tod_clock();
4624 cqr->status = DASD_CQR_FILLED;
4625
4626 rc = dasd_sleep_on(cqr);
4627
4628 dasd_sfree_request(cqr, cqr->memdev);
4629 return rc;
4630}
4631
4632static int dasd_eckd_cuir_change_state(struct dasd_device *device, __u8 lpum)
4633{
4634 unsigned long flags;
4635 __u8 tbcpm;
4636
4637 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4638 tbcpm = device->path_data.opm & ~lpum;
4639 if (tbcpm) {
4640 device->path_data.opm = tbcpm;
4641 device->path_data.cuirpm |= lpum;
4642 }
4643 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4644 return tbcpm ? 0 : PSF_CUIR_LAST_PATH;
4645}
4646
4647/*
4648 * walk through all devices and quiesce them
4649 * if it is the last path return error
4650 *
4651 * if only part of the devices are quiesced and an error
4652 * occurs no onlining necessary, the storage server will
4653 * notify the already set offline devices again
4654 */
4655static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
4656 struct channel_path_desc *desc,
4657 struct subchannel_id sch_id)
4658{
4659 struct alias_pav_group *pavgroup, *tempgroup;
4660 struct dasd_eckd_private *private;
4661 struct dasd_device *dev, *n;
4662 int rc;
4663
4664 private = (struct dasd_eckd_private *) device->private;
4665 rc = 0;
4666
4667 /* active devices */
4668 list_for_each_entry_safe(dev, n,
4669 &private->lcu->active_devices,
4670 alias_list) {
4671 rc = dasd_eckd_cuir_change_state(dev, lpum);
4672 if (rc)
4673 goto out;
4674 }
4675
4676 /* inactive devices */
4677 list_for_each_entry_safe(dev, n,
4678 &private->lcu->inactive_devices,
4679 alias_list) {
4680 rc = dasd_eckd_cuir_change_state(dev, lpum);
4681 if (rc)
4682 goto out;
4683 }
4684
4685 /* devices in PAV groups */
4686 list_for_each_entry_safe(pavgroup, tempgroup,
4687 &private->lcu->grouplist, group) {
4688 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
4689 alias_list) {
4690 rc = dasd_eckd_cuir_change_state(dev, lpum);
4691 if (rc)
4692 goto out;
4693 }
4694 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
4695 alias_list) {
4696 rc = dasd_eckd_cuir_change_state(dev, lpum);
4697 if (rc)
4698 goto out;
4699 }
4700 }
4701
4702 pr_warn("Service on the storage server caused path %x.%02x to go offline",
4703 sch_id.cssid, desc ? desc->chpid : 0);
4704 rc = PSF_CUIR_COMPLETED;
4705out:
4706 return rc;
4707}
4708
4709static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
4710 struct channel_path_desc *desc,
4711 struct subchannel_id sch_id)
4712{
4713 struct alias_pav_group *pavgroup, *tempgroup;
4714 struct dasd_eckd_private *private;
4715 struct dasd_device *dev, *n;
4716
4717 pr_info("Path %x.%02x is back online after service on the storage server",
4718 sch_id.cssid, desc ? desc->chpid : 0);
4719 private = (struct dasd_eckd_private *) device->private;
4720
4721 /*
4722 * the path may have been added through a generic path event before
4723 * only trigger path verification if the path is not already in use
4724 */
4725
4726 list_for_each_entry_safe(dev, n,
4727 &private->lcu->active_devices,
4728 alias_list) {
4729 if (!(dev->path_data.opm & lpum)) {
4730 dev->path_data.tbvpm |= lpum;
4731 dasd_schedule_device_bh(dev);
4732 }
4733 }
4734
4735 list_for_each_entry_safe(dev, n,
4736 &private->lcu->inactive_devices,
4737 alias_list) {
4738 if (!(dev->path_data.opm & lpum)) {
4739 dev->path_data.tbvpm |= lpum;
4740 dasd_schedule_device_bh(dev);
4741 }
4742 }
4743
4744 /* devices in PAV groups */
4745 list_for_each_entry_safe(pavgroup, tempgroup,
4746 &private->lcu->grouplist,
4747 group) {
4748 list_for_each_entry_safe(dev, n,
4749 &pavgroup->baselist,
4750 alias_list) {
4751 if (!(dev->path_data.opm & lpum)) {
4752 dev->path_data.tbvpm |= lpum;
4753 dasd_schedule_device_bh(dev);
4754 }
4755 }
4756 list_for_each_entry_safe(dev, n,
4757 &pavgroup->aliaslist,
4758 alias_list) {
4759 if (!(dev->path_data.opm & lpum)) {
4760 dev->path_data.tbvpm |= lpum;
4761 dasd_schedule_device_bh(dev);
4762 }
4763 }
4764 }
4765 return PSF_CUIR_COMPLETED;
4766}
4767
4768static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
4769 __u8 lpum)
4770{
4771 struct dasd_cuir_message *cuir = messages;
4772 struct channel_path_desc *desc;
4773 struct subchannel_id sch_id;
4774 int pos, response;
4775 ccw_device_get_schid(device->cdev, &sch_id);
4776
4777 /* get position of path in mask */
4778 pos = 8 - ffs(lpum);
4779 /* get channel path descriptor from this position */
4780 desc = ccw_device_get_chp_desc(device->cdev, pos);
4781
4782 if (cuir->code == CUIR_QUIESCE) {
4783 /* quiesce */
4784 response = dasd_eckd_cuir_quiesce(device, lpum, desc, sch_id);
4785 } else if (cuir->code == CUIR_RESUME) {
4786 /* resume */
4787 response = dasd_eckd_cuir_resume(device, lpum, desc, sch_id);
4788 } else
4789 response = PSF_CUIR_NOT_SUPPORTED;
4790
4791 dasd_eckd_psf_cuir_response(device, response, cuir->message_id,
4792 desc, sch_id);
4793
4794 /* free descriptor copy */
4795 kfree(desc);
4796}
4797
4798static void dasd_eckd_check_attention_work(struct work_struct *work)
4799{
4800 struct check_attention_work_data *data;
4801 struct dasd_rssd_messages *messages;
4802 struct dasd_device *device;
4803 int rc;
4804
4805 data = container_of(work, struct check_attention_work_data, worker);
4806 device = data->device;
4807
4808 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
4809 if (!messages) {
4810 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4811 "Could not allocate attention message buffer");
4812 goto out;
4813 }
4814
4815 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
4816 if (rc)
4817 goto out;
4818
4819 if (messages->length == ATTENTION_LENGTH_CUIR &&
4820 messages->format == ATTENTION_FORMAT_CUIR)
4821 dasd_eckd_handle_cuir(device, messages, data->lpum);
4822
4823out:
4824 dasd_put_device(device);
4825 kfree(messages);
4826 kfree(data);
4827}
4828
4829static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
4830{
4831 struct check_attention_work_data *data;
4832
4833 data = kzalloc(sizeof(*data), GFP_ATOMIC);
4834 if (!data)
4835 return -ENOMEM;
4836 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
4837 dasd_get_device(device);
4838 data->device = device;
4839 data->lpum = lpum;
4840 schedule_work(&data->worker);
4841 return 0;
4842}
4843
d41dd122 4844static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 4845 .driver = {
4846 .name = "dasd-eckd",
4847 .owner = THIS_MODULE,
4848 },
d41dd122
SH		 4849 .ids = dasd_eckd_ids,
4850 .probe = dasd_eckd_probe,
4851 .remove = dasd_generic_remove,
4852 .set_offline = dasd_generic_set_offline,
4853 .set_online = dasd_eckd_set_online,
4854 .notify = dasd_generic_notify,
a4d26c6a 4855 .path_event = dasd_generic_path_event,
4679e893 4856 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 4857 .freeze = dasd_generic_pm_freeze,
4858 .thaw = dasd_generic_restore_device,
4859 .restore = dasd_generic_restore_device,
a23ed009 4860 .uc_handler = dasd_generic_uc_handler,
420f42ec 4861 .int_class = IRQIO_DAS,
d41dd122 4862};
f3eb5384 4863
1da177e4
LT		 4864/*
4865 * max_blocks is dependent on the amount of storage that is available
4866 * in the static io buffer for each device. Currently each device has
4867 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
4868 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
4869 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
4870 * addition we have one define extent ccw + 16 bytes of data and one
4871 * locate record ccw + 16 bytes of data. That makes:
4872 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
4873 * We want to fit two into the available memory so that we can immediately
4874 * start the next request if one finishes off. That makes 249.5 blocks
4875 * for one request. Give a little safety and the result is 240.
4876 */
4877static struct dasd_discipline dasd_eckd_discipline = {
4878 .owner = THIS_MODULE,
4879 .name = "ECKD",
4880 .ebcname = "ECKD",
ef19298b 4881 .max_blocks = 190,
1da177e4 4882 .check_device = dasd_eckd_check_characteristics,
8e09f215 4883 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 4884 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 4885 .verify_path = dasd_eckd_verify_path,
d42e1712 4886 .basic_to_ready = dasd_eckd_basic_to_ready,
8e09f215 4887 .online_to_ready = dasd_eckd_online_to_ready,
daa991bf 4888 .basic_to_known = dasd_eckd_basic_to_known,
1da177e4
LT		 4889 .fill_geometry = dasd_eckd_fill_geometry,
4890 .start_IO = dasd_start_IO,
4891 .term_IO = dasd_term_IO,
8e09f215 4892 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 4893 .format_device = dasd_eckd_format_device,
1da177e4
LT		 4894 .erp_action = dasd_eckd_erp_action,
4895 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 4896 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 4897 .build_cp = dasd_eckd_build_alias_cp,
4898 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 4899 .dump_sense = dasd_eckd_dump_sense,
fc19f381 4900 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 4901 .fill_info = dasd_eckd_fill_info,
1107ccfb 4902 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 4903 .freeze = dasd_eckd_pm_freeze,
4904 .restore = dasd_eckd_restore_device,
501183f2 4905 .reload = dasd_eckd_reload_device,
2dedf0d9 4906 .get_uid = dasd_eckd_get_uid,
f1633031 4907 .kick_validate = dasd_eckd_kick_validate_server,
5db8440c 4908 .check_attention = dasd_eckd_check_attention,
1da177e4
LT		 4909};
4910
4911static int __init
4912dasd_eckd_init(void)
4913{
736e6ea0
SO		 4914 int ret;
4915
1da177e4 4916 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 4917 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
4918 GFP_KERNEL | GFP_DMA);
4919 if (!dasd_reserve_req)
4920 return -ENOMEM;
a4d26c6a
SW		 4921 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
4922 GFP_KERNEL | GFP_DMA);
4923 if (!path_verification_worker) {
4924 kfree(dasd_reserve_req);
4925 return -ENOMEM;
4926 }
558b9ef0
SW		 4927 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
4928 if (!rawpadpage) {
4929 kfree(path_verification_worker);
4930 kfree(dasd_reserve_req);
4931 return -ENOMEM;
4932 }
736e6ea0
SO		 4933 ret = ccw_driver_register(&dasd_eckd_driver);
4934 if (!ret)
4935 wait_for_device_probe();
a4d26c6a
SW		 4936 else {
4937 kfree(path_verification_worker);
f932bcea 4938 kfree(dasd_reserve_req);
558b9ef0 4939 free_page((unsigned long)rawpadpage);
a4d26c6a 4940 }
736e6ea0 4941 return ret;
1da177e4
LT		 4942}
4943
4944static void __exit
4945dasd_eckd_cleanup(void)
4946{
4947 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 4948 kfree(path_verification_worker);
f932bcea 4949 kfree(dasd_reserve_req);
558b9ef0 4950 free_page((unsigned long)rawpadpage);
1da177e4
LT		 4951}
4952
4953module_init(dasd_eckd_init);
4954module_exit(dasd_eckd_cleanup);
Ubuntu Hirsute Linux kernel mirror