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Merge branch 'timer/cleanup' into late/mvebu2
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / block / dasd_eckd.c
CommitLineData
138c014d 1/*
1da177e4 2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d 3 * Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
d41dd122 7 * Copyright IBM Corp. 1999, 2009
ab1d848f
NH		 8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
1da177e4
LT		 10 */
11
ca99dab0 12#define KMSG_COMPONENT "dasd-eckd"
fc19f381 13
1da177e4
LT		 14#include <linux/stddef.h>
15#include <linux/kernel.h>
16#include <linux/slab.h>
17#include <linux/hdreg.h> /* HDIO_GETGEO */
18#include <linux/bio.h>
19#include <linux/module.h>
048cd4e5 20#include <linux/compat.h>
1da177e4
LT		 21#include <linux/init.h>
22
382b7366 23#include <asm/css_chars.h>
1da177e4
LT		 24#include <asm/debug.h>
25#include <asm/idals.h>
26#include <asm/ebcdic.h>
27#include <asm/io.h>
1da177e4 28#include <asm/uaccess.h>
40545573 29#include <asm/cio.h>
1da177e4 30#include <asm/ccwdev.h>
f3eb5384 31#include <asm/itcw.h>
1da177e4
LT		 32
33#include "dasd_int.h"
34#include "dasd_eckd.h"
35
36#ifdef PRINTK_HEADER
37#undef PRINTK_HEADER
38#endif /* PRINTK_HEADER */
39#define PRINTK_HEADER "dasd(eckd):"
40
41#define ECKD_C0(i) (i->home_bytes)
42#define ECKD_F(i) (i->formula)
43#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
44 (i->factors.f_0x02.f1))
45#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
46 (i->factors.f_0x02.f2))
47#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
48 (i->factors.f_0x02.f3))
49#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
50#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
51#define ECKD_F6(i) (i->factor6)
52#define ECKD_F7(i) (i->factor7)
53#define ECKD_F8(i) (i->factor8)
54
e4dbb0f2
SH		 55/*
56 * raw track access always map to 64k in memory
57 * so it maps to 16 blocks of 4k per track
58 */
59#define DASD_RAW_BLOCK_PER_TRACK 16
60#define DASD_RAW_BLOCKSIZE 4096
61/* 64k are 128 x 512 byte sectors */
62#define DASD_RAW_SECTORS_PER_TRACK 128
63
1da177e4
LT		 64MODULE_LICENSE("GPL");
65
66static struct dasd_discipline dasd_eckd_discipline;
67
1da177e4
LT		 68/* The ccw bus type uses this table to find devices that it sends to
69 * dasd_eckd_probe */
70static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 71 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
72 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
5da24b76 73 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
d2c993d8
HC		 74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
76 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
77 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
78 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
79 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
80 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 81 { /* end of list */ },
82};
83
84MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
85
86static struct ccw_driver dasd_eckd_driver; /* see below */
87
eb6e199b
SW		 88#define INIT_CQR_OK 0
89#define INIT_CQR_UNFORMATTED 1
90#define INIT_CQR_ERROR 2
91
f932bcea
SW		 92/* emergency request for reserve/release */
93static struct {
94 struct dasd_ccw_req cqr;
95 struct ccw1 ccw;
96 char data[32];
97} *dasd_reserve_req;
98static DEFINE_MUTEX(dasd_reserve_mutex);
99
a4d26c6a
SW		 100/* definitions for the path verification worker */
101struct path_verification_work_data {
102 struct work_struct worker;
103 struct dasd_device *device;
104 struct dasd_ccw_req cqr;
105 struct ccw1 ccw;
106 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
107 int isglobal;
108 __u8 tbvpm;
109};
110static struct path_verification_work_data *path_verification_worker;
111static DEFINE_MUTEX(dasd_path_verification_mutex);
eb6e199b 112
1da177e4
LT		 113/* initial attempt at a probe function. this can be simplified once
114 * the other detection code is gone */
115static int
116dasd_eckd_probe (struct ccw_device *cdev)
117{
118 int ret;
119
40545573 120 /* set ECKD specific ccw-device options */
454e1fa1
PO		 121 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
122 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 123 if (ret) {
b8ed5dd5
SH		 124 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
125 "dasd_eckd_probe: could not set "
126 "ccw-device options");
1da177e4 127 return ret;
40545573
HH		 128 }
129 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
130 return ret;
1da177e4
LT		 131}
132
133static int
134dasd_eckd_set_online(struct ccw_device *cdev)
135{
40545573 136 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 137}
138
1da177e4
LT		 139static const int sizes_trk0[] = { 28, 148, 84 };
140#define LABEL_SIZE 140
141
3bc9fef9
SH		 142/* head and record addresses of count_area read in analysis ccw */
143static const int count_area_head[] = { 0, 0, 0, 0, 2 };
144static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
145
1da177e4
LT		 146static inline unsigned int
147round_up_multiple(unsigned int no, unsigned int mult)
148{
149 int rem = no % mult;
150 return (rem ? no - rem + mult : no);
151}
152
153static inline unsigned int
154ceil_quot(unsigned int d1, unsigned int d2)
155{
156 return (d1 + (d2 - 1)) / d2;
157}
158
4d284cac 159static unsigned int
1da177e4
LT		 160recs_per_track(struct dasd_eckd_characteristics * rdc,
161 unsigned int kl, unsigned int dl)
162{
163 int dn, kn;
164
165 switch (rdc->dev_type) {
166 case 0x3380:
167 if (kl)
168 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
169 ceil_quot(dl + 12, 32));
170 else
171 return 1499 / (15 + ceil_quot(dl + 12, 32));
172 case 0x3390:
173 dn = ceil_quot(dl + 6, 232) + 1;
174 if (kl) {
175 kn = ceil_quot(kl + 6, 232) + 1;
176 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
177 9 + ceil_quot(dl + 6 * dn, 34));
178 } else
179 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
180 case 0x9345:
181 dn = ceil_quot(dl + 6, 232) + 1;
182 if (kl) {
183 kn = ceil_quot(kl + 6, 232) + 1;
184 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
185 ceil_quot(dl + 6 * dn, 34));
186 } else
187 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
188 }
189 return 0;
190}
191
b44b0ab3
SW		 192static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
193{
194 geo->cyl = (__u16) cyl;
195 geo->head = cyl >> 16;
196 geo->head <<= 4;
197 geo->head |= head;
198}
199
4d284cac 200static int
1da177e4
LT		 201check_XRC (struct ccw1 *de_ccw,
202 struct DE_eckd_data *data,
203 struct dasd_device *device)
204{
205 struct dasd_eckd_private *private;
d54853ef 206 int rc;
1da177e4
LT		 207
208 private = (struct dasd_eckd_private *) device->private;
d54853ef
MS		 209 if (!private->rdc_data.facilities.XRC_supported)
210 return 0;
1da177e4
LT		 211
212 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 213 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
214 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 215
d54853ef
MS		 216 rc = get_sync_clock(&data->ep_sys_time);
217 /* Ignore return code if sync clock is switched off. */
a8f6db4d 218 if (rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 219 rc = 0;
1da177e4 220
8e09f215 221 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 222 de_ccw->flags |= CCW_FLAG_SLI;
223 return rc;
224}
1da177e4 225
4d284cac 226static int
b44b0ab3
SW		 227define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
228 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4
LT		 229{
230 struct dasd_eckd_private *private;
b44b0ab3
SW		 231 u32 begcyl, endcyl;
232 u16 heads, beghead, endhead;
d54853ef 233 int rc = 0;
1da177e4
LT		 234
235 private = (struct dasd_eckd_private *) device->private;
236
237 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
238 ccw->flags = 0;
239 ccw->count = 16;
240 ccw->cda = (__u32) __pa(data);
241
8e09f215 242 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 243 switch (cmd) {
244 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
245 case DASD_ECKD_CCW_READ_RECORD_ZERO:
246 case DASD_ECKD_CCW_READ:
247 case DASD_ECKD_CCW_READ_MT:
248 case DASD_ECKD_CCW_READ_CKD:
249 case DASD_ECKD_CCW_READ_CKD_MT:
250 case DASD_ECKD_CCW_READ_KD:
251 case DASD_ECKD_CCW_READ_KD_MT:
252 case DASD_ECKD_CCW_READ_COUNT:
253 data->mask.perm = 0x1;
254 data->attributes.operation = private->attrib.operation;
255 break;
256 case DASD_ECKD_CCW_WRITE:
257 case DASD_ECKD_CCW_WRITE_MT:
258 case DASD_ECKD_CCW_WRITE_KD:
259 case DASD_ECKD_CCW_WRITE_KD_MT:
260 data->mask.perm = 0x02;
261 data->attributes.operation = private->attrib.operation;
d54853ef 262 rc = check_XRC (ccw, data, device);
1da177e4
LT		 263 break;
264 case DASD_ECKD_CCW_WRITE_CKD:
265 case DASD_ECKD_CCW_WRITE_CKD_MT:
266 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 267 rc = check_XRC (ccw, data, device);
1da177e4
LT		 268 break;
269 case DASD_ECKD_CCW_ERASE:
270 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
271 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
272 data->mask.perm = 0x3;
273 data->mask.auth = 0x1;
274 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 275 rc = check_XRC (ccw, data, device);
1da177e4
LT		 276 break;
277 default:
fc19f381
SH		 278 dev_err(&device->cdev->dev,
279 "0x%x is not a known command\n", cmd);
1da177e4
LT		 280 break;
281 }
282
283 data->attributes.mode = 0x3; /* ECKD */
284
285 if ((private->rdc_data.cu_type == 0x2105 ||
286 private->rdc_data.cu_type == 0x2107 ||
287 private->rdc_data.cu_type == 0x1750)
288 && !(private->uses_cdl && trk < 2))
289 data->ga_extended |= 0x40; /* Regular Data Format Mode */
290
b44b0ab3
SW		 291 heads = private->rdc_data.trk_per_cyl;
292 begcyl = trk / heads;
293 beghead = trk % heads;
294 endcyl = totrk / heads;
295 endhead = totrk % heads;
1da177e4
LT		 296
297 /* check for sequential prestage - enhance cylinder range */
298 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
299 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 300
b44b0ab3
SW		 301 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
302 endcyl += private->attrib.nr_cyl;
1da177e4 303 else
b44b0ab3 304 endcyl = (private->real_cyl - 1);
1da177e4
LT		 305 }
306
b44b0ab3
SW		 307 set_ch_t(&data->beg_ext, begcyl, beghead);
308 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 309 return rc;
1da177e4
LT		 310}
311
8e09f215
SW		 312static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
313 struct dasd_device *device)
314{
315 struct dasd_eckd_private *private;
316 int rc;
317
318 private = (struct dasd_eckd_private *) device->private;
319 if (!private->rdc_data.facilities.XRC_supported)
320 return 0;
321
322 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 323 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
324 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 325 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
326
f3eb5384 327 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215 328 /* Ignore return code if sync clock is switched off. */
a8f6db4d 329 if (rc == -EOPNOTSUPP || rc == -EACCES)
8e09f215
SW		 330 rc = 0;
331 return rc;
332}
333
f3eb5384
SW		 334static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
335 unsigned int rec_on_trk, int count, int cmd,
336 struct dasd_device *device, unsigned int reclen,
337 unsigned int tlf)
338{
339 struct dasd_eckd_private *private;
340 int sector;
341 int dn, d;
342
343 private = (struct dasd_eckd_private *) device->private;
344
345 memset(data, 0, sizeof(*data));
346 sector = 0;
347 if (rec_on_trk) {
348 switch (private->rdc_data.dev_type) {
349 case 0x3390:
350 dn = ceil_quot(reclen + 6, 232);
351 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
352 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
353 break;
354 case 0x3380:
355 d = 7 + ceil_quot(reclen + 12, 32);
356 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
357 break;
358 }
359 }
360 data->sector = sector;
361 /* note: meaning of count depends on the operation
362 * for record based I/O it's the number of records, but for
363 * track based I/O it's the number of tracks
364 */
365 data->count = count;
366 switch (cmd) {
367 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
368 data->operation.orientation = 0x3;
369 data->operation.operation = 0x03;
370 break;
371 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
372 data->operation.orientation = 0x3;
373 data->operation.operation = 0x16;
374 break;
375 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
376 data->operation.orientation = 0x1;
377 data->operation.operation = 0x03;
378 data->count++;
379 break;
380 case DASD_ECKD_CCW_READ_RECORD_ZERO:
381 data->operation.orientation = 0x3;
382 data->operation.operation = 0x16;
383 data->count++;
384 break;
385 case DASD_ECKD_CCW_WRITE:
386 case DASD_ECKD_CCW_WRITE_MT:
387 case DASD_ECKD_CCW_WRITE_KD:
388 case DASD_ECKD_CCW_WRITE_KD_MT:
389 data->auxiliary.length_valid = 0x1;
390 data->length = reclen;
391 data->operation.operation = 0x01;
392 break;
393 case DASD_ECKD_CCW_WRITE_CKD:
394 case DASD_ECKD_CCW_WRITE_CKD_MT:
395 data->auxiliary.length_valid = 0x1;
396 data->length = reclen;
397 data->operation.operation = 0x03;
398 break;
e4dbb0f2
SH		 399 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
400 data->operation.orientation = 0x0;
401 data->operation.operation = 0x3F;
402 data->extended_operation = 0x11;
403 data->length = 0;
404 data->extended_parameter_length = 0x02;
405 if (data->count > 8) {
406 data->extended_parameter[0] = 0xFF;
407 data->extended_parameter[1] = 0xFF;
408 data->extended_parameter[1] <<= (16 - count);
409 } else {
410 data->extended_parameter[0] = 0xFF;
411 data->extended_parameter[0] <<= (8 - count);
412 data->extended_parameter[1] = 0x00;
413 }
414 data->sector = 0xFF;
415 break;
f3eb5384
SW		 416 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
417 data->auxiliary.length_valid = 0x1;
418 data->length = reclen; /* not tlf, as one might think */
419 data->operation.operation = 0x3F;
420 data->extended_operation = 0x23;
421 break;
422 case DASD_ECKD_CCW_READ:
423 case DASD_ECKD_CCW_READ_MT:
424 case DASD_ECKD_CCW_READ_KD:
425 case DASD_ECKD_CCW_READ_KD_MT:
426 data->auxiliary.length_valid = 0x1;
427 data->length = reclen;
428 data->operation.operation = 0x06;
429 break;
430 case DASD_ECKD_CCW_READ_CKD:
431 case DASD_ECKD_CCW_READ_CKD_MT:
432 data->auxiliary.length_valid = 0x1;
433 data->length = reclen;
434 data->operation.operation = 0x16;
435 break;
436 case DASD_ECKD_CCW_READ_COUNT:
437 data->operation.operation = 0x06;
438 break;
e4dbb0f2
SH		 439 case DASD_ECKD_CCW_READ_TRACK:
440 data->operation.orientation = 0x1;
441 data->operation.operation = 0x0C;
442 data->extended_parameter_length = 0;
443 data->sector = 0xFF;
444 break;
f3eb5384
SW		 445 case DASD_ECKD_CCW_READ_TRACK_DATA:
446 data->auxiliary.length_valid = 0x1;
447 data->length = tlf;
448 data->operation.operation = 0x0C;
449 break;
450 case DASD_ECKD_CCW_ERASE:
451 data->length = reclen;
452 data->auxiliary.length_valid = 0x1;
453 data->operation.operation = 0x0b;
454 break;
455 default:
456 DBF_DEV_EVENT(DBF_ERR, device,
457 "fill LRE unknown opcode 0x%x", cmd);
458 BUG();
459 }
460 set_ch_t(&data->seek_addr,
461 trk / private->rdc_data.trk_per_cyl,
462 trk % private->rdc_data.trk_per_cyl);
463 data->search_arg.cyl = data->seek_addr.cyl;
464 data->search_arg.head = data->seek_addr.head;
465 data->search_arg.record = rec_on_trk;
466}
467
468static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
469 unsigned int trk, unsigned int totrk, int cmd,
470 struct dasd_device *basedev, struct dasd_device *startdev,
471 unsigned char format, unsigned int rec_on_trk, int count,
472 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 473{
474 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 475 struct DE_eckd_data *dedata;
476 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 477 u32 begcyl, endcyl;
478 u16 heads, beghead, endhead;
8e09f215
SW		 479 int rc = 0;
480
481 basepriv = (struct dasd_eckd_private *) basedev->private;
482 startpriv = (struct dasd_eckd_private *) startdev->private;
f3eb5384
SW		 483 dedata = &pfxdata->define_extent;
484 lredata = &pfxdata->locate_record;
8e09f215
SW		 485
486 ccw->cmd_code = DASD_ECKD_CCW_PFX;
487 ccw->flags = 0;
e4dbb0f2
SH		 488 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
489 ccw->count = sizeof(*pfxdata) + 2;
490 ccw->cda = (__u32) __pa(pfxdata);
491 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
492 } else {
493 ccw->count = sizeof(*pfxdata);
494 ccw->cda = (__u32) __pa(pfxdata);
495 memset(pfxdata, 0, sizeof(*pfxdata));
496 }
8e09f215 497
8e09f215 498 /* prefix data */
f3eb5384
SW		 499 if (format > 1) {
500 DBF_DEV_EVENT(DBF_ERR, basedev,
501 "PFX LRE unknown format 0x%x", format);
502 BUG();
503 return -EINVAL;
504 }
505 pfxdata->format = format;
4abb08c2
SW		 506 pfxdata->base_address = basepriv->ned->unit_addr;
507 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 508 pfxdata->validity.define_extent = 1;
8e09f215
SW		 509
510 /* private uid is kept up to date, conf_data may be outdated */
511 if (startpriv->uid.type != UA_BASE_DEVICE) {
512 pfxdata->validity.verify_base = 1;
513 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
514 pfxdata->validity.hyper_pav = 1;
515 }
516
517 /* define extend data (mostly)*/
518 switch (cmd) {
519 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
520 case DASD_ECKD_CCW_READ_RECORD_ZERO:
521 case DASD_ECKD_CCW_READ:
522 case DASD_ECKD_CCW_READ_MT:
523 case DASD_ECKD_CCW_READ_CKD:
524 case DASD_ECKD_CCW_READ_CKD_MT:
525 case DASD_ECKD_CCW_READ_KD:
526 case DASD_ECKD_CCW_READ_KD_MT:
527 case DASD_ECKD_CCW_READ_COUNT:
f3eb5384
SW		 528 dedata->mask.perm = 0x1;
529 dedata->attributes.operation = basepriv->attrib.operation;
530 break;
e4dbb0f2 531 case DASD_ECKD_CCW_READ_TRACK:
f3eb5384
SW		 532 case DASD_ECKD_CCW_READ_TRACK_DATA:
533 dedata->mask.perm = 0x1;
534 dedata->attributes.operation = basepriv->attrib.operation;
535 dedata->blk_size = 0;
8e09f215
SW		 536 break;
537 case DASD_ECKD_CCW_WRITE:
538 case DASD_ECKD_CCW_WRITE_MT:
539 case DASD_ECKD_CCW_WRITE_KD:
540 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 541 dedata->mask.perm = 0x02;
542 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 543 rc = check_XRC_on_prefix(pfxdata, basedev);
544 break;
545 case DASD_ECKD_CCW_WRITE_CKD:
546 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 547 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 548 rc = check_XRC_on_prefix(pfxdata, basedev);
549 break;
550 case DASD_ECKD_CCW_ERASE:
551 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
552 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 553 dedata->mask.perm = 0x3;
554 dedata->mask.auth = 0x1;
555 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 556 rc = check_XRC_on_prefix(pfxdata, basedev);
557 break;
e4dbb0f2
SH		 558 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
559 dedata->mask.perm = 0x03;
560 dedata->attributes.operation = basepriv->attrib.operation;
561 dedata->blk_size = 0;
562 break;
f3eb5384
SW		 563 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
564 dedata->mask.perm = 0x02;
565 dedata->attributes.operation = basepriv->attrib.operation;
566 dedata->blk_size = blksize;
567 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 568 break;
f3eb5384
SW		 569 default:
570 DBF_DEV_EVENT(DBF_ERR, basedev,
571 "PFX LRE unknown opcode 0x%x", cmd);
572 BUG();
573 return -EINVAL;
8e09f215
SW		 574 }
575
f3eb5384 576 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 577
578 if ((basepriv->rdc_data.cu_type == 0x2105 ||
579 basepriv->rdc_data.cu_type == 0x2107 ||
580 basepriv->rdc_data.cu_type == 0x1750)
581 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 582 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 583
b44b0ab3
SW		 584 heads = basepriv->rdc_data.trk_per_cyl;
585 begcyl = trk / heads;
586 beghead = trk % heads;
587 endcyl = totrk / heads;
588 endhead = totrk % heads;
8e09f215
SW		 589
590 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 591 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
592 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 593
b44b0ab3
SW		 594 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
595 endcyl += basepriv->attrib.nr_cyl;
8e09f215 596 else
b44b0ab3 597 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 598 }
599
f3eb5384
SW		 600 set_ch_t(&dedata->beg_ext, begcyl, beghead);
601 set_ch_t(&dedata->end_ext, endcyl, endhead);
602
603 if (format == 1) {
604 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
605 basedev, blksize, tlf);
606 }
607
8e09f215
SW		 608 return rc;
609}
610
f3eb5384
SW		 611static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
612 unsigned int trk, unsigned int totrk, int cmd,
613 struct dasd_device *basedev, struct dasd_device *startdev)
614{
615 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
616 0, 0, 0, 0, 0);
617}
618
4d284cac 619static void
b44b0ab3
SW		 620locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
621 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 622 struct dasd_device * device, int reclen)
623{
624 struct dasd_eckd_private *private;
625 int sector;
626 int dn, d;
138c014d 627
1da177e4
LT		 628 private = (struct dasd_eckd_private *) device->private;
629
630 DBF_DEV_EVENT(DBF_INFO, device,
631 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
632 trk, rec_on_trk, no_rec, cmd, reclen);
633
634 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
635 ccw->flags = 0;
636 ccw->count = 16;
637 ccw->cda = (__u32) __pa(data);
638
8e09f215 639 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 640 sector = 0;
641 if (rec_on_trk) {
642 switch (private->rdc_data.dev_type) {
643 case 0x3390:
644 dn = ceil_quot(reclen + 6, 232);
645 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
646 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
647 break;
648 case 0x3380:
649 d = 7 + ceil_quot(reclen + 12, 32);
650 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
651 break;
652 }
653 }
654 data->sector = sector;
655 data->count = no_rec;
656 switch (cmd) {
657 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
658 data->operation.orientation = 0x3;
659 data->operation.operation = 0x03;
660 break;
661 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
662 data->operation.orientation = 0x3;
663 data->operation.operation = 0x16;
664 break;
665 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
666 data->operation.orientation = 0x1;
667 data->operation.operation = 0x03;
668 data->count++;
669 break;
670 case DASD_ECKD_CCW_READ_RECORD_ZERO:
671 data->operation.orientation = 0x3;
672 data->operation.operation = 0x16;
673 data->count++;
674 break;
675 case DASD_ECKD_CCW_WRITE:
676 case DASD_ECKD_CCW_WRITE_MT:
677 case DASD_ECKD_CCW_WRITE_KD:
678 case DASD_ECKD_CCW_WRITE_KD_MT:
679 data->auxiliary.last_bytes_used = 0x1;
680 data->length = reclen;
681 data->operation.operation = 0x01;
682 break;
683 case DASD_ECKD_CCW_WRITE_CKD:
684 case DASD_ECKD_CCW_WRITE_CKD_MT:
685 data->auxiliary.last_bytes_used = 0x1;
686 data->length = reclen;
687 data->operation.operation = 0x03;
688 break;
689 case DASD_ECKD_CCW_READ:
690 case DASD_ECKD_CCW_READ_MT:
691 case DASD_ECKD_CCW_READ_KD:
692 case DASD_ECKD_CCW_READ_KD_MT:
693 data->auxiliary.last_bytes_used = 0x1;
694 data->length = reclen;
695 data->operation.operation = 0x06;
696 break;
697 case DASD_ECKD_CCW_READ_CKD:
698 case DASD_ECKD_CCW_READ_CKD_MT:
699 data->auxiliary.last_bytes_used = 0x1;
700 data->length = reclen;
701 data->operation.operation = 0x16;
702 break;
703 case DASD_ECKD_CCW_READ_COUNT:
704 data->operation.operation = 0x06;
705 break;
706 case DASD_ECKD_CCW_ERASE:
707 data->length = reclen;
708 data->auxiliary.last_bytes_used = 0x1;
709 data->operation.operation = 0x0b;
710 break;
711 default:
fc19f381
SH		 712 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
713 "opcode 0x%x", cmd);
1da177e4 714 }
b44b0ab3
SW		 715 set_ch_t(&data->seek_addr,
716 trk / private->rdc_data.trk_per_cyl,
717 trk % private->rdc_data.trk_per_cyl);
718 data->search_arg.cyl = data->seek_addr.cyl;
719 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 720 data->search_arg.record = rec_on_trk;
721}
722
723/*
724 * Returns 1 if the block is one of the special blocks that needs
725 * to get read/written with the KD variant of the command.
726 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
727 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
728 * Luckily the KD variants differ only by one bit (0x08) from the
729 * normal variant. So don't wonder about code like:
730 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
731 * ccw->cmd_code |= 0x8;
732 */
733static inline int
734dasd_eckd_cdl_special(int blk_per_trk, int recid)
735{
736 if (recid < 3)
737 return 1;
738 if (recid < blk_per_trk)
739 return 0;
740 if (recid < 2 * blk_per_trk)
741 return 1;
742 return 0;
743}
744
745/*
746 * Returns the record size for the special blocks of the cdl format.
747 * Only returns something useful if dasd_eckd_cdl_special is true
748 * for the recid.
749 */
750static inline int
751dasd_eckd_cdl_reclen(int recid)
752{
753 if (recid < 3)
754 return sizes_trk0[recid];
755 return LABEL_SIZE;
756}
b206181d
SH		 757/* create unique id from private structure. */
758static void create_uid(struct dasd_eckd_private *private)
3d052595 759{
4abb08c2 760 int count;
b206181d 761 struct dasd_uid *uid;
3d052595 762
2dedf0d9 763 uid = &private->uid;
3d052595 764 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 765 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 766 sizeof(uid->vendor) - 1);
3d052595 767 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 768 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 769 sizeof(uid->serial) - 1);
3d052595 770 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 771 uid->ssid = private->gneq->subsystemID;
a419aef8 772 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 773 if (private->sneq) {
774 uid->type = private->sneq->sua_flags;
8e09f215 775 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 776 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 777 } else {
778 uid->type = UA_BASE_DEVICE;
779 }
4abb08c2
SW		 780 if (private->vdsneq) {
781 for (count = 0; count < 16; count++) {
782 sprintf(uid->vduit+2*count, "%02x",
783 private->vdsneq->uit[count]);
784 }
785 }
b206181d
SH		 786}
787
788/*
789 * Generate device unique id that specifies the physical device.
790 */
791static int dasd_eckd_generate_uid(struct dasd_device *device)
792{
793 struct dasd_eckd_private *private;
794 unsigned long flags;
795
796 private = (struct dasd_eckd_private *) device->private;
797 if (!private)
798 return -ENODEV;
799 if (!private->ned || !private->gneq)
800 return -ENODEV;
801 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
802 create_uid(private);
2dedf0d9 803 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 804 return 0;
805}
806
2dedf0d9
SH		 807static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
808{
809 struct dasd_eckd_private *private;
810 unsigned long flags;
811
812 if (device->private) {
813 private = (struct dasd_eckd_private *)device->private;
814 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
815 *uid = private->uid;
816 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
817 return 0;
818 }
819 return -EINVAL;
820}
821
b206181d
SH		 822/*
823 * compare device UID with data of a given dasd_eckd_private structure
824 * return 0 for match
825 */
826static int dasd_eckd_compare_path_uid(struct dasd_device *device,
827 struct dasd_eckd_private *private)
828{
829 struct dasd_uid device_uid;
830
831 create_uid(private);
832 dasd_eckd_get_uid(device, &device_uid);
833
834 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
835}
836
a4d26c6a
SW		 837static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
838 struct dasd_ccw_req *cqr,
839 __u8 *rcd_buffer,
840 __u8 lpm)
17283b56 841{
17283b56 842 struct ccw1 *ccw;
a4d26c6a
SW		 843 /*
844 * buffer has to start with EBCDIC "V1.0" to show
845 * support for virtual device SNEQ
846 */
847 rcd_buffer[0] = 0xE5;
848 rcd_buffer[1] = 0xF1;
849 rcd_buffer[2] = 0x4B;
850 rcd_buffer[3] = 0xF0;
17283b56
CH		 851
852 ccw = cqr->cpaddr;
a4d26c6a
SW		 853 ccw->cmd_code = DASD_ECKD_CCW_RCD;
854 ccw->flags = 0;
17283b56 855 ccw->cda = (__u32)(addr_t)rcd_buffer;
a4d26c6a
SW		 856 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
857 cqr->magic = DASD_ECKD_MAGIC;
17283b56 858
8e09f215
SW		 859 cqr->startdev = device;
860 cqr->memdev = device;
861 cqr->block = NULL;
17283b56
CH		 862 cqr->expires = 10*HZ;
863 cqr->lpm = lpm;
eb6e199b 864 cqr->retries = 256;
17283b56
CH		 865 cqr->buildclk = get_clock();
866 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 867 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
868}
869
5915a873
SH		 870/*
871 * Wakeup helper for read_conf
872 * if the cqr is not done and needs some error recovery
873 * the buffer has to be re-initialized with the EBCDIC "V1.0"
874 * to show support for virtual device SNEQ
875 */
876static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
877{
878 struct ccw1 *ccw;
879 __u8 *rcd_buffer;
880
881 if (cqr->status != DASD_CQR_DONE) {
882 ccw = cqr->cpaddr;
883 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
884 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
885
886 rcd_buffer[0] = 0xE5;
887 rcd_buffer[1] = 0xF1;
888 rcd_buffer[2] = 0x4B;
889 rcd_buffer[3] = 0xF0;
890 }
891 dasd_wakeup_cb(cqr, data);
892}
893
a4d26c6a
SW		 894static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
895 struct dasd_ccw_req *cqr,
896 __u8 *rcd_buffer,
897 __u8 lpm)
898{
899 struct ciw *ciw;
900 int rc;
901 /*
902 * sanity check: scan for RCD command in extended SenseID data
903 * some devices do not support RCD
904 */
905 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
906 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
907 return -EOPNOTSUPP;
908
909 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
910 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 911 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 912 cqr->retries = 5;
5915a873 913 cqr->callback = read_conf_cb;
a4d26c6a
SW		 914 rc = dasd_sleep_on_immediatly(cqr);
915 return rc;
17283b56
CH		 916}
917
918static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
919 void **rcd_buffer,
920 int *rcd_buffer_size, __u8 lpm)
921{
922 struct ciw *ciw;
923 char *rcd_buf = NULL;
924 int ret;
925 struct dasd_ccw_req *cqr;
926
927 /*
a4d26c6a
SW		 928 * sanity check: scan for RCD command in extended SenseID data
929 * some devices do not support RCD
17283b56
CH		 930 */
931 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 932 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 933 ret = -EOPNOTSUPP;
934 goto out_error;
935 }
a4d26c6a 936 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 937 if (!rcd_buf) {
938 ret = -ENOMEM;
939 goto out_error;
940 }
a4d26c6a
SW		 941 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
942 0, /* use rcd_buf as data ara */
943 device);
17283b56 944 if (IS_ERR(cqr)) {
a4d26c6a
SW		 945 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
946 "Could not allocate RCD request");
947 ret = -ENOMEM;
17283b56
CH		 948 goto out_error;
949 }
a4d26c6a 950 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 951 cqr->callback = read_conf_cb;
17283b56
CH		 952 ret = dasd_sleep_on(cqr);
953 /*
954 * on success we update the user input parms
955 */
8e09f215 956 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 957 if (ret)
958 goto out_error;
959
a4d26c6a 960 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 961 *rcd_buffer = rcd_buf;
962 return 0;
963out_error:
964 kfree(rcd_buf);
965 *rcd_buffer = NULL;
966 *rcd_buffer_size = 0;
967 return ret;
968}
969
4abb08c2
SW		 970static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
971{
972
973 struct dasd_sneq *sneq;
974 int i, count;
975
976 private->ned = NULL;
977 private->sneq = NULL;
978 private->vdsneq = NULL;
979 private->gneq = NULL;
980 count = private->conf_len / sizeof(struct dasd_sneq);
981 sneq = (struct dasd_sneq *)private->conf_data;
982 for (i = 0; i < count; ++i) {
983 if (sneq->flags.identifier == 1 && sneq->format == 1)
984 private->sneq = sneq;
985 else if (sneq->flags.identifier == 1 && sneq->format == 4)
986 private->vdsneq = (struct vd_sneq *)sneq;
987 else if (sneq->flags.identifier == 2)
988 private->gneq = (struct dasd_gneq *)sneq;
989 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
990 private->ned = (struct dasd_ned *)sneq;
991 sneq++;
992 }
993 if (!private->ned || !private->gneq) {
994 private->ned = NULL;
995 private->sneq = NULL;
996 private->vdsneq = NULL;
997 private->gneq = NULL;
998 return -EINVAL;
999 }
1000 return 0;
1001
1002};
1003
1004static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
1005{
1006 struct dasd_gneq *gneq;
1007 int i, count, found;
1008
1009 count = conf_len / sizeof(*gneq);
1010 gneq = (struct dasd_gneq *)conf_data;
1011 found = 0;
1012 for (i = 0; i < count; ++i) {
1013 if (gneq->flags.identifier == 2) {
1014 found = 1;
1015 break;
1016 }
1017 gneq++;
1018 }
1019 if (found)
1020 return ((char *)gneq)[18] & 0x07;
1021 else
1022 return 0;
1023}
1024
1025static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 1026{
1027 void *conf_data;
1028 int conf_len, conf_data_saved;
55d3a85c 1029 int rc, path_err;
a4d26c6a 1030 __u8 lpm, opm;
b206181d 1031 struct dasd_eckd_private *private, path_private;
a4d26c6a 1032 struct dasd_path *path_data;
b206181d
SH		 1033 struct dasd_uid *uid;
1034 char print_path_uid[60], print_device_uid[60];
1da177e4
LT		 1035
1036 private = (struct dasd_eckd_private *) device->private;
a4d26c6a
SW		 1037 path_data = &device->path_data;
1038 opm = ccw_device_get_path_mask(device->cdev);
1da177e4 1039 conf_data_saved = 0;
55d3a85c 1040 path_err = 0;
1da177e4
LT		 1041 /* get configuration data per operational path */
1042 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1043 if (!(lpm & opm))
1044 continue;
1045 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1046 &conf_len, lpm);
1047 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1048 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1049 "Read configuration data returned "
1050 "error %d", rc);
1051 return rc;
1052 }
1053 if (conf_data == NULL) {
1054 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1055 "No configuration data "
1056 "retrieved");
1057 /* no further analysis possible */
1058 path_data->opm |= lpm;
1059 continue; /* no error */
1060 }
1061 /* save first valid configuration data */
1062 if (!conf_data_saved) {
1063 kfree(private->conf_data);
1064 private->conf_data = conf_data;
1065 private->conf_len = conf_len;
1066 if (dasd_eckd_identify_conf_parts(private)) {
1067 private->conf_data = NULL;
1068 private->conf_len = 0;
1069 kfree(conf_data);
1070 continue;
1da177e4 1071 }
b206181d
SH		 1072 /*
1073 * build device UID that other path data
1074 * can be compared to it
1075 */
1076 dasd_eckd_generate_uid(device);
1077 conf_data_saved++;
1078 } else {
1079 path_private.conf_data = conf_data;
1080 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1081 if (dasd_eckd_identify_conf_parts(
1082 &path_private)) {
1083 path_private.conf_data = NULL;
1084 path_private.conf_len = 0;
1085 kfree(conf_data);
1086 continue;
1da177e4 1087 }
b206181d
SH		 1088
1089 if (dasd_eckd_compare_path_uid(
1090 device, &path_private)) {
1091 uid = &path_private.uid;
1092 if (strlen(uid->vduit) > 0)
1093 snprintf(print_path_uid,
1094 sizeof(print_path_uid),
1095 "%s.%s.%04x.%02x.%s",
1096 uid->vendor, uid->serial,
1097 uid->ssid, uid->real_unit_addr,
1098 uid->vduit);
1099 else
1100 snprintf(print_path_uid,
1101 sizeof(print_path_uid),
1102 "%s.%s.%04x.%02x",
1103 uid->vendor, uid->serial,
1104 uid->ssid,
1105 uid->real_unit_addr);
1106 uid = &private->uid;
1107 if (strlen(uid->vduit) > 0)
1108 snprintf(print_device_uid,
1109 sizeof(print_device_uid),
1110 "%s.%s.%04x.%02x.%s",
1111 uid->vendor, uid->serial,
1112 uid->ssid, uid->real_unit_addr,
1113 uid->vduit);
1114 else
1115 snprintf(print_device_uid,
1116 sizeof(print_device_uid),
1117 "%s.%s.%04x.%02x",
1118 uid->vendor, uid->serial,
1119 uid->ssid,
1120 uid->real_unit_addr);
1121 dev_err(&device->cdev->dev,
1122 "Not all channel paths lead to "
1123 "the same device, path %02X leads to "
1124 "device %s instead of %s\n", lpm,
1125 print_path_uid, print_device_uid);
55d3a85c
SH		 1126 path_err = -EINVAL;
1127 continue;
1da177e4 1128 }
b206181d
SH		 1129
1130 path_private.conf_data = NULL;
1131 path_private.conf_len = 0;
1132 }
1133 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1134 case 0x02:
1135 path_data->npm |= lpm;
1136 break;
1137 case 0x03:
1138 path_data->ppm |= lpm;
1139 break;
1da177e4 1140 }
b206181d
SH		 1141 path_data->opm |= lpm;
1142
1143 if (conf_data != private->conf_data)
1144 kfree(conf_data);
1da177e4 1145 }
b206181d 1146
55d3a85c 1147 return path_err;
1da177e4
LT		 1148}
1149
a4d26c6a
SW		 1150static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1151{
1152 struct dasd_eckd_private *private;
1153 int mdc;
1154 u32 fcx_max_data;
1155
1156 private = (struct dasd_eckd_private *) device->private;
1157 if (private->fcx_max_data) {
1158 mdc = ccw_device_get_mdc(device->cdev, lpm);
1159 if ((mdc < 0)) {
1160 dev_warn(&device->cdev->dev,
1161 "Detecting the maximum data size for zHPF "
1162 "requests failed (rc=%d) for a new path %x\n",
1163 mdc, lpm);
1164 return mdc;
1165 }
1166 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
1167 if (fcx_max_data < private->fcx_max_data) {
1168 dev_warn(&device->cdev->dev,
1169 "The maximum data size for zHPF requests %u "
1170 "on a new path %x is below the active maximum "
1171 "%u\n", fcx_max_data, lpm,
1172 private->fcx_max_data);
1173 return -EACCES;
1174 }
1175 }
1176 return 0;
1177}
1178
b206181d
SH		 1179static int rebuild_device_uid(struct dasd_device *device,
1180 struct path_verification_work_data *data)
1181{
1182 struct dasd_eckd_private *private;
1183 struct dasd_path *path_data;
1184 __u8 lpm, opm;
1185 int rc;
1186
1187 rc = -ENODEV;
1188 private = (struct dasd_eckd_private *) device->private;
1189 path_data = &device->path_data;
1190 opm = device->path_data.opm;
1191
1192 for (lpm = 0x80; lpm; lpm >>= 1) {
1193 if (!(lpm & opm))
1194 continue;
1195 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1196 memset(&data->cqr, 0, sizeof(data->cqr));
1197 data->cqr.cpaddr = &data->ccw;
1198 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1199 data->rcd_buffer,
1200 lpm);
1201
1202 if (rc) {
1203 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1204 continue;
1205 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1206 "Read configuration data "
1207 "returned error %d", rc);
1208 break;
1209 }
1210 memcpy(private->conf_data, data->rcd_buffer,
1211 DASD_ECKD_RCD_DATA_SIZE);
1212 if (dasd_eckd_identify_conf_parts(private)) {
1213 rc = -ENODEV;
1214 } else /* first valid path is enough */
1215 break;
1216 }
1217
1218 if (!rc)
1219 rc = dasd_eckd_generate_uid(device);
1220
1221 return rc;
1222}
1223
a4d26c6a
SW		 1224static void do_path_verification_work(struct work_struct *work)
1225{
1226 struct path_verification_work_data *data;
1227 struct dasd_device *device;
b206181d
SH		 1228 struct dasd_eckd_private path_private;
1229 struct dasd_uid *uid;
1230 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
a4d26c6a
SW		 1231 __u8 lpm, opm, npm, ppm, epm;
1232 unsigned long flags;
b206181d 1233 char print_uid[60];
a4d26c6a
SW		 1234 int rc;
1235
1236 data = container_of(work, struct path_verification_work_data, worker);
1237 device = data->device;
1238
c8d1c0ff
SH		 1239 /* delay path verification until device was resumed */
1240 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1241 schedule_work(work);
1242 return;
1243 }
1244
a4d26c6a
SW		 1245 opm = 0;
1246 npm = 0;
1247 ppm = 0;
1248 epm = 0;
1249 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1250 if (!(lpm & data->tbvpm))
1251 continue;
1252 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1253 memset(&data->cqr, 0, sizeof(data->cqr));
1254 data->cqr.cpaddr = &data->ccw;
1255 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1256 data->rcd_buffer,
1257 lpm);
1258 if (!rc) {
1259 switch (dasd_eckd_path_access(data->rcd_buffer,
1260 DASD_ECKD_RCD_DATA_SIZE)
1261 ) {
1262 case 0x02:
1263 npm |= lpm;
1264 break;
1265 case 0x03:
1266 ppm |= lpm;
1267 break;
1268 }
1269 opm |= lpm;
1270 } else if (rc == -EOPNOTSUPP) {
1271 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1272 "path verification: No configuration "
1273 "data retrieved");
1274 opm |= lpm;
1275 } else if (rc == -EAGAIN) {
1276 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1277 "path verification: device is stopped,"
1278 " try again later");
b206181d
SH		 1279 epm |= lpm;
1280 } else {
1281 dev_warn(&device->cdev->dev,
1282 "Reading device feature codes failed "
1283 "(rc=%d) for new path %x\n", rc, lpm);
1284 continue;
1285 }
1286 if (verify_fcx_max_data(device, lpm)) {
1287 opm &= ~lpm;
1288 npm &= ~lpm;
1289 ppm &= ~lpm;
1290 continue;
1291 }
1292
1293 /*
1294 * save conf_data for comparison after
1295 * rebuild_device_uid may have changed
1296 * the original data
1297 */
1298 memcpy(&path_rcd_buf, data->rcd_buffer,
1299 DASD_ECKD_RCD_DATA_SIZE);
1300 path_private.conf_data = (void *) &path_rcd_buf;
1301 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1302 if (dasd_eckd_identify_conf_parts(&path_private)) {
1303 path_private.conf_data = NULL;
1304 path_private.conf_len = 0;
1305 continue;
1306 }
1307
1308 /*
1309 * compare path UID with device UID only if at least
1310 * one valid path is left
1311 * in other case the device UID may have changed and
1312 * the first working path UID will be used as device UID
1313 */
1314 if (device->path_data.opm &&
1315 dasd_eckd_compare_path_uid(device, &path_private)) {
1316 /*
1317 * the comparison was not successful
1318 * rebuild the device UID with at least one
1319 * known path in case a z/VM hyperswap command
1320 * has changed the device
1321 *
1322 * after this compare again
1323 *
1324 * if either the rebuild or the recompare fails
1325 * the path can not be used
1326 */
1327 if (rebuild_device_uid(device, data) ||
1328 dasd_eckd_compare_path_uid(
1329 device, &path_private)) {
1330 uid = &path_private.uid;
1331 if (strlen(uid->vduit) > 0)
1332 snprintf(print_uid, sizeof(print_uid),
1333 "%s.%s.%04x.%02x.%s",
1334 uid->vendor, uid->serial,
1335 uid->ssid, uid->real_unit_addr,
1336 uid->vduit);
1337 else
1338 snprintf(print_uid, sizeof(print_uid),
1339 "%s.%s.%04x.%02x",
1340 uid->vendor, uid->serial,
1341 uid->ssid,
1342 uid->real_unit_addr);
1343 dev_err(&device->cdev->dev,
1344 "The newly added channel path %02X "
1345 "will not be used because it leads "
1346 "to a different device %s\n",
1347 lpm, print_uid);
a4d26c6a
SW		 1348 opm &= ~lpm;
1349 npm &= ~lpm;
1350 ppm &= ~lpm;
b206181d 1351 continue;
a4d26c6a
SW		 1352 }
1353 }
b206181d
SH		 1354
1355 /*
1356 * There is a small chance that a path is lost again between
1357 * above path verification and the following modification of
1358 * the device opm mask. We could avoid that race here by using
1359 * yet another path mask, but we rather deal with this unlikely
1360 * situation in dasd_start_IO.
1361 */
1362 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1363 if (!device->path_data.opm && opm) {
1364 device->path_data.opm = opm;
1365 dasd_generic_path_operational(device);
1366 } else
1367 device->path_data.opm |= opm;
1368 device->path_data.npm |= npm;
1369 device->path_data.ppm |= ppm;
1370 device->path_data.tbvpm |= epm;
1371 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1372 }
a4d26c6a
SW		 1373
1374 dasd_put_device(device);
1375 if (data->isglobal)
1376 mutex_unlock(&dasd_path_verification_mutex);
1377 else
1378 kfree(data);
1379}
1380
1381static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1382{
1383 struct path_verification_work_data *data;
1384
1385 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1386 if (!data) {
1387 if (mutex_trylock(&dasd_path_verification_mutex)) {
1388 data = path_verification_worker;
1389 data->isglobal = 1;
1390 } else
1391 return -ENOMEM;
1392 } else {
1393 memset(data, 0, sizeof(*data));
1394 data->isglobal = 0;
1395 }
1396 INIT_WORK(&data->worker, do_path_verification_work);
1397 dasd_get_device(device);
1398 data->device = device;
1399 data->tbvpm = lpm;
1400 schedule_work(&data->worker);
1401 return 0;
1402}
1403
8e09f215
SW		 1404static int dasd_eckd_read_features(struct dasd_device *device)
1405{
1406 struct dasd_psf_prssd_data *prssdp;
1407 struct dasd_rssd_features *features;
1408 struct dasd_ccw_req *cqr;
1409 struct ccw1 *ccw;
1410 int rc;
1411 struct dasd_eckd_private *private;
1412
1413 private = (struct dasd_eckd_private *) device->private;
68d1e5f0 1414 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1415 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1416 (sizeof(struct dasd_psf_prssd_data) +
1417 sizeof(struct dasd_rssd_features)),
1418 device);
1419 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1420 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1421 "allocate initialization request");
8e09f215
SW		 1422 return PTR_ERR(cqr);
1423 }
1424 cqr->startdev = device;
1425 cqr->memdev = device;
1426 cqr->block = NULL;
eb6e199b 1427 cqr->retries = 256;
8e09f215
SW		 1428 cqr->expires = 10 * HZ;
1429
1430 /* Prepare for Read Subsystem Data */
1431 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1432 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1433 prssdp->order = PSF_ORDER_PRSSD;
1434 prssdp->suborder = 0x41; /* Read Feature Codes */
1435 /* all other bytes of prssdp must be zero */
1436
1437 ccw = cqr->cpaddr;
1438 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1439 ccw->count = sizeof(struct dasd_psf_prssd_data);
1440 ccw->flags |= CCW_FLAG_CC;
1441 ccw->cda = (__u32)(addr_t) prssdp;
1442
1443 /* Read Subsystem Data - feature codes */
1444 features = (struct dasd_rssd_features *) (prssdp + 1);
1445 memset(features, 0, sizeof(struct dasd_rssd_features));
1446
1447 ccw++;
1448 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1449 ccw->count = sizeof(struct dasd_rssd_features);
1450 ccw->cda = (__u32)(addr_t) features;
1451
1452 cqr->buildclk = get_clock();
1453 cqr->status = DASD_CQR_FILLED;
1454 rc = dasd_sleep_on(cqr);
1455 if (rc == 0) {
1456 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1457 features = (struct dasd_rssd_features *) (prssdp + 1);
1458 memcpy(&private->features, features,
1459 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1460 } else
1461 dev_warn(&device->cdev->dev, "Reading device feature codes"
1462 " failed with rc=%d\n", rc);
8e09f215
SW		 1463 dasd_sfree_request(cqr, cqr->memdev);
1464 return rc;
1465}
1466
1467
40545573
HH		 1468/*
1469 * Build CP for Perform Subsystem Function - SSC.
1470 */
f3eb5384
SW		 1471static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1472 int enable_pav)
40545573 1473{
8e09f215
SW		 1474 struct dasd_ccw_req *cqr;
1475 struct dasd_psf_ssc_data *psf_ssc_data;
1476 struct ccw1 *ccw;
40545573 1477
68b781fe 1478 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1479 sizeof(struct dasd_psf_ssc_data),
1480 device);
1481
8e09f215 1482 if (IS_ERR(cqr)) {
fc19f381 1483 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1484 "Could not allocate PSF-SSC request");
8e09f215
SW		 1485 return cqr;
1486 }
1487 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1488 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1489 psf_ssc_data->suborder = 0xc0;
f3eb5384 1490 if (enable_pav) {
626350b6 1491 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1492 psf_ssc_data->reserved[0] = 0x88;
1493 }
8e09f215
SW		 1494 ccw = cqr->cpaddr;
1495 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1496 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1497 ccw->count = 66;
1498
1499 cqr->startdev = device;
1500 cqr->memdev = device;
1501 cqr->block = NULL;
eb6e199b 1502 cqr->retries = 256;
8e09f215
SW		 1503 cqr->expires = 10*HZ;
1504 cqr->buildclk = get_clock();
1505 cqr->status = DASD_CQR_FILLED;
1506 return cqr;
40545573
HH		 1507}
1508
1509/*
1510 * Perform Subsystem Function.
1511 * It is necessary to trigger CIO for channel revalidation since this
1512 * call might change behaviour of DASD devices.
1513 */
1514static int
12d7b107
SH		 1515dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1516 unsigned long flags)
40545573 1517{
8e09f215
SW		 1518 struct dasd_ccw_req *cqr;
1519 int rc;
1520
f3eb5384 1521 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1522 if (IS_ERR(cqr))
1523 return PTR_ERR(cqr);
1524
12d7b107
SH		 1525 /*
1526 * set flags e.g. turn on failfast, to prevent blocking
1527 * the calling function should handle failed requests
1528 */
1529 cqr->flags |= flags;
1530
8e09f215
SW		 1531 rc = dasd_sleep_on(cqr);
1532 if (!rc)
1533 /* trigger CIO to reprobe devices */
1534 css_schedule_reprobe();
12d7b107
SH		 1535 else if (cqr->intrc == -EAGAIN)
1536 rc = -EAGAIN;
1537
8e09f215
SW		 1538 dasd_sfree_request(cqr, cqr->memdev);
1539 return rc;
40545573
HH		 1540}
1541
1542/*
1543 * Valide storage server of current device.
1544 */
12d7b107
SH		 1545static int dasd_eckd_validate_server(struct dasd_device *device,
1546 unsigned long flags)
40545573
HH		 1547{
1548 int rc;
8e09f215 1549 struct dasd_eckd_private *private;
f3eb5384 1550 int enable_pav;
40545573 1551
f9f8d02f
SH		 1552 private = (struct dasd_eckd_private *) device->private;
1553 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1554 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1555 return 0;
40545573 1556 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1557 enable_pav = 0;
1558 else
1559 enable_pav = 1;
12d7b107 1560 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1561
8e79a441
HH		 1562 /* may be requested feature is not available on server,
1563 * therefore just report error and go ahead */
b8ed5dd5
SH		 1564 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1565 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1566 return rc;
40545573
HH		 1567}
1568
f1633031
SH		 1569/*
1570 * worker to do a validate server in case of a lost pathgroup
1571 */
1572static void dasd_eckd_do_validate_server(struct work_struct *work)
1573{
1574 struct dasd_device *device = container_of(work, struct dasd_device,
1575 kick_validate);
12d7b107
SH		 1576 if (dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST)
1577 == -EAGAIN) {
1578 /* schedule worker again if failed */
1579 schedule_work(&device->kick_validate);
1580 return;
1581 }
1582
f1633031
SH		 1583 dasd_put_device(device);
1584}
1585
1586static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1587{
1588 dasd_get_device(device);
25e2cf1c
SH		 1589 /* exit if device not online or in offline processing */
1590 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1591 device->state < DASD_STATE_ONLINE) {
1592 dasd_put_device(device);
1593 return;
1594 }
f1633031
SH		 1595 /* queue call to do_validate_server to the kernel event daemon. */
1596 schedule_work(&device->kick_validate);
1597}
1598
ef19298b
SW		 1599static u32 get_fcx_max_data(struct dasd_device *device)
1600{
1601#if defined(CONFIG_64BIT)
1602 int tpm, mdc;
1603 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1604 struct dasd_eckd_private *private;
1605
1606 if (dasd_nofcx)
1607 return 0;
1608 /* is transport mode supported? */
1609 private = (struct dasd_eckd_private *) device->private;
1610 fcx_in_css = css_general_characteristics.fcx;
1611 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1612 fcx_in_features = private->features.feature[40] & 0x80;
1613 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1614
1615 if (!tpm)
1616 return 0;
1617
1618 mdc = ccw_device_get_mdc(device->cdev, 0);
1619 if (mdc < 0) {
1620 dev_warn(&device->cdev->dev, "Detecting the maximum supported"
1621 " data size for zHPF requests failed\n");
1622 return 0;
1623 } else
1624 return mdc * FCX_MAX_DATA_FACTOR;
1625#else
1626 return 0;
1627#endif
1628}
1629
3d052595
HH		 1630/*
1631 * Check device characteristics.
1632 * If the device is accessible using ECKD discipline, the device is enabled.
1633 */
1da177e4
LT		 1634static int
1635dasd_eckd_check_characteristics(struct dasd_device *device)
1636{
1637 struct dasd_eckd_private *private;
8e09f215 1638 struct dasd_block *block;
2dedf0d9 1639 struct dasd_uid temp_uid;
f9f8d02f 1640 int rc, i;
33b62a30 1641 int readonly;
7c8faa86 1642 unsigned long value;
1da177e4 1643
f1633031
SH		 1644 /* setup work queue for validate server*/
1645 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1646
454e1fa1
PO		 1647 if (!ccw_device_is_pathgroup(device->cdev)) {
1648 dev_warn(&device->cdev->dev,
1649 "A channel path group could not be established\n");
1650 return -EIO;
1651 }
1652 if (!ccw_device_is_multipath(device->cdev)) {
1653 dev_info(&device->cdev->dev,
1654 "The DASD is not operating in multipath mode\n");
1655 }
1da177e4 1656 private = (struct dasd_eckd_private *) device->private;
92636b15
SO		 1657 if (!private) {
1658 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1659 if (!private) {
fc19f381
SH		 1660 dev_warn(&device->cdev->dev,
1661 "Allocating memory for private DASD data "
1662 "failed\n");
1da177e4
LT		 1663 return -ENOMEM;
1664 }
1da177e4 1665 device->private = (void *) private;
92636b15
SO		 1666 } else {
1667 memset(private, 0, sizeof(*private));
1da177e4
LT		 1668 }
1669 /* Invalidate status of initial analysis. */
1670 private->init_cqr_status = -1;
1671 /* Set default cache operations. */
1672 private->attrib.operation = DASD_NORMAL_CACHE;
1673 private->attrib.nr_cyl = 0;
1674
40545573
HH		 1675 /* Read Configuration Data */
1676 rc = dasd_eckd_read_conf(device);
1677 if (rc)
8e09f215 1678 goto out_err1;
40545573 1679
7c8faa86
SH		 1680 /* set default timeout */
1681 device->default_expires = DASD_EXPIRES;
1682 if (private->gneq) {
1683 value = 1;
1684 for (i = 0; i < private->gneq->timeout.value; i++)
1685 value = 10 * value;
1686 value = value * private->gneq->timeout.number;
1687 /* do not accept useless values */
1688 if (value != 0 && value <= DASD_EXPIRES_MAX)
1689 device->default_expires = value;
1690 }
1691
2dedf0d9
SH		 1692 dasd_eckd_get_uid(device, &temp_uid);
1693 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1694 block = dasd_alloc_block();
1695 if (IS_ERR(block)) {
b8ed5dd5
SH		 1696 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1697 "could not allocate dasd "
1698 "block structure");
8e09f215
SW		 1699 rc = PTR_ERR(block);
1700 goto out_err1;
1701 }
1702 device->block = block;
1703 block->base = device;
1704 }
1705
f9f8d02f
SH		 1706 /* register lcu with alias handling, enable PAV */
1707 rc = dasd_alias_make_device_known_to_lcu(device);
1708 if (rc)
8e09f215 1709 goto out_err2;
f9f8d02f 1710
12d7b107 1711 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 1712
1713 /* device may report different configuration data after LCU setup */
1714 rc = dasd_eckd_read_conf(device);
1715 if (rc)
1716 goto out_err3;
8e09f215
SW		 1717
1718 /* Read Feature Codes */
68d1e5f0 1719 dasd_eckd_read_features(device);
40545573 1720
1da177e4 1721 /* Read Device Characteristics */
68b781fe
SH		 1722 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1723 &private->rdc_data, 64);
8e09f215 1724 if (rc) {
b8ed5dd5
SH		 1725 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1726 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1727 goto out_err3;
1728 }
34cd551a
SH		 1729
1730 if ((device->features & DASD_FEATURE_USERAW) &&
1731 !(private->rdc_data.facilities.RT_in_LR)) {
1732 dev_err(&device->cdev->dev, "The storage server does not "
1733 "support raw-track access\n");
1734 rc = -EINVAL;
1735 goto out_err3;
1736 }
1737
817f2c84 1738 /* find the valid cylinder size */
b44b0ab3
SW		 1739 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1740 private->rdc_data.long_no_cyl)
1741 private->real_cyl = private->rdc_data.long_no_cyl;
1742 else
1743 private->real_cyl = private->rdc_data.no_cyl;
1744
ef19298b
SW		 1745 private->fcx_max_data = get_fcx_max_data(device);
1746
33b62a30
SW		 1747 readonly = dasd_device_is_ro(device);
1748 if (readonly)
1749 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1750
fc19f381 1751 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1752 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1753 private->rdc_data.dev_type,
1754 private->rdc_data.dev_model,
1755 private->rdc_data.cu_type,
1756 private->rdc_data.cu_model.model,
92636b15 1757 private->real_cyl,
fc19f381 1758 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1759 private->rdc_data.sec_per_trk,
1760 readonly ? ", read-only device" : "");
8e09f215
SW		 1761 return 0;
1762
1763out_err3:
1764 dasd_alias_disconnect_device_from_lcu(device);
1765out_err2:
1766 dasd_free_block(device->block);
1767 device->block = NULL;
1768out_err1:
4abb08c2 1769 kfree(private->conf_data);
8e09f215
SW		 1770 kfree(device->private);
1771 device->private = NULL;
3d052595 1772 return rc;
1da177e4
LT		 1773}
1774
8e09f215
SW		 1775static void dasd_eckd_uncheck_device(struct dasd_device *device)
1776{
4abb08c2
SW		 1777 struct dasd_eckd_private *private;
1778
1779 private = (struct dasd_eckd_private *) device->private;
8e09f215 1780 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1781 private->ned = NULL;
1782 private->sneq = NULL;
1783 private->vdsneq = NULL;
1784 private->gneq = NULL;
1785 private->conf_len = 0;
1786 kfree(private->conf_data);
1787 private->conf_data = NULL;
8e09f215
SW		 1788}
1789
1da177e4
LT		 1790static struct dasd_ccw_req *
1791dasd_eckd_analysis_ccw(struct dasd_device *device)
1792{
1793 struct dasd_eckd_private *private;
1794 struct eckd_count *count_data;
1795 struct LO_eckd_data *LO_data;
1796 struct dasd_ccw_req *cqr;
1797 struct ccw1 *ccw;
1798 int cplength, datasize;
1799 int i;
1800
1801 private = (struct dasd_eckd_private *) device->private;
1802
1803 cplength = 8;
1804 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1805 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1806 if (IS_ERR(cqr))
1807 return cqr;
1808 ccw = cqr->cpaddr;
1809 /* Define extent for the first 3 tracks. */
1810 define_extent(ccw++, cqr->data, 0, 2,
1811 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1812 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1813 /* Locate record for the first 4 records on track 0. */
1814 ccw[-1].flags |= CCW_FLAG_CC;
1815 locate_record(ccw++, LO_data++, 0, 0, 4,
1816 DASD_ECKD_CCW_READ_COUNT, device, 0);
1817
1818 count_data = private->count_area;
1819 for (i = 0; i < 4; i++) {
1820 ccw[-1].flags |= CCW_FLAG_CC;
1821 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1822 ccw->flags = 0;
1823 ccw->count = 8;
1824 ccw->cda = (__u32)(addr_t) count_data;
1825 ccw++;
1826 count_data++;
1827 }
1828
1829 /* Locate record for the first record on track 2. */
1830 ccw[-1].flags |= CCW_FLAG_CC;
1831 locate_record(ccw++, LO_data++, 2, 0, 1,
1832 DASD_ECKD_CCW_READ_COUNT, device, 0);
1833 /* Read count ccw. */
1834 ccw[-1].flags |= CCW_FLAG_CC;
1835 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1836 ccw->flags = 0;
1837 ccw->count = 8;
1838 ccw->cda = (__u32)(addr_t) count_data;
1839
8e09f215
SW		 1840 cqr->block = NULL;
1841 cqr->startdev = device;
1842 cqr->memdev = device;
eb6e199b 1843 cqr->retries = 255;
1da177e4
LT		 1844 cqr->buildclk = get_clock();
1845 cqr->status = DASD_CQR_FILLED;
1846 return cqr;
1847}
1848
eb6e199b
SW		 1849/* differentiate between 'no record found' and any other error */
1850static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1851{
1852 char *sense;
1853 if (init_cqr->status == DASD_CQR_DONE)
1854 return INIT_CQR_OK;
1855 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1856 init_cqr->status == DASD_CQR_FAILED) {
1857 sense = dasd_get_sense(&init_cqr->irb);
1858 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1859 return INIT_CQR_UNFORMATTED;
1860 else
1861 return INIT_CQR_ERROR;
1862 } else
1863 return INIT_CQR_ERROR;
1864}
1865
1da177e4
LT		 1866/*
1867 * This is the callback function for the init_analysis cqr. It saves
1868 * the status of the initial analysis ccw before it frees it and kicks
1869 * the device to continue the startup sequence. This will call
1870 * dasd_eckd_do_analysis again (if the devices has not been marked
1871 * for deletion in the meantime).
1872 */
eb6e199b
SW		 1873static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1874 void *data)
1da177e4
LT		 1875{
1876 struct dasd_eckd_private *private;
1877 struct dasd_device *device;
1878
8e09f215 1879 device = init_cqr->startdev;
1da177e4 1880 private = (struct dasd_eckd_private *) device->private;
eb6e199b 1881 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1882 dasd_sfree_request(init_cqr, device);
1883 dasd_kick_device(device);
1884}
1885
eb6e199b 1886static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 1887{
1da177e4
LT		 1888 struct dasd_ccw_req *init_cqr;
1889
8e09f215 1890 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1891 if (IS_ERR(init_cqr))
1892 return PTR_ERR(init_cqr);
1893 init_cqr->callback = dasd_eckd_analysis_callback;
1894 init_cqr->callback_data = NULL;
1895 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1896 /* first try without ERP, so we can later handle unformatted
1897 * devices as special case
1898 */
1899 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1900 init_cqr->retries = 0;
1da177e4
LT		 1901 dasd_add_request_head(init_cqr);
1902 return -EAGAIN;
1903}
1904
eb6e199b 1905static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1906{
8e09f215 1907 struct dasd_device *device;
1da177e4
LT		 1908 struct dasd_eckd_private *private;
1909 struct eckd_count *count_area;
1910 unsigned int sb, blk_per_trk;
1911 int status, i;
eb6e199b 1912 struct dasd_ccw_req *init_cqr;
1da177e4 1913
8e09f215 1914 device = block->base;
1da177e4
LT		 1915 private = (struct dasd_eckd_private *) device->private;
1916 status = private->init_cqr_status;
1917 private->init_cqr_status = -1;
eb6e199b
SW		 1918 if (status == INIT_CQR_ERROR) {
1919 /* try again, this time with full ERP */
1920 init_cqr = dasd_eckd_analysis_ccw(device);
1921 dasd_sleep_on(init_cqr);
1922 status = dasd_eckd_analysis_evaluation(init_cqr);
1923 dasd_sfree_request(init_cqr, device);
1924 }
1925
e4dbb0f2
SH		 1926 if (device->features & DASD_FEATURE_USERAW) {
1927 block->bp_block = DASD_RAW_BLOCKSIZE;
1928 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1929 block->s2b_shift = 3;
1930 goto raw;
1931 }
1932
eb6e199b
SW		 1933 if (status == INIT_CQR_UNFORMATTED) {
1934 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1935 return -EMEDIUMTYPE;
eb6e199b
SW		 1936 } else if (status == INIT_CQR_ERROR) {
1937 dev_err(&device->cdev->dev,
1938 "Detecting the DASD disk layout failed because "
1939 "of an I/O error\n");
1940 return -EIO;
1da177e4
LT		 1941 }
1942
1943 private->uses_cdl = 1;
1da177e4
LT		 1944 /* Check Track 0 for Compatible Disk Layout */
1945 count_area = NULL;
1946 for (i = 0; i < 3; i++) {
1947 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 1948 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
1949 private->count_area[i].cyl != 0 ||
1950 private->count_area[i].head != count_area_head[i] ||
1951 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 1952 private->uses_cdl = 0;
1953 break;
1954 }
1955 }
1956 if (i == 3)
1957 count_area = &private->count_area[4];
1958
1959 if (private->uses_cdl == 0) {
1960 for (i = 0; i < 5; i++) {
1961 if ((private->count_area[i].kl != 0) ||
1962 (private->count_area[i].dl !=
3bc9fef9
SH		 1963 private->count_area[0].dl) ||
1964 private->count_area[i].cyl != 0 ||
1965 private->count_area[i].head != count_area_head[i] ||
1966 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 1967 break;
1968 }
1969 if (i == 5)
1970 count_area = &private->count_area[0];
1971 } else {
1972 if (private->count_area[3].record == 1)
fc19f381
SH		 1973 dev_warn(&device->cdev->dev,
1974 "Track 0 has no records following the VTOC\n");
1da177e4 1975 }
e4dbb0f2 1976
1da177e4
LT		 1977 if (count_area != NULL && count_area->kl == 0) {
1978 /* we found notthing violating our disk layout */
1979 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1980 block->bp_block = count_area->dl;
1da177e4 1981 }
8e09f215 1982 if (block->bp_block == 0) {
fc19f381
SH		 1983 dev_warn(&device->cdev->dev,
1984 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1985 return -EMEDIUMTYPE;
1986 }
8e09f215
SW		 1987 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1988 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1989 block->s2b_shift++;
1da177e4 1990
8e09f215 1991 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 1992
1993raw:
b44b0ab3 1994 block->blocks = (private->real_cyl *
1da177e4
LT		 1995 private->rdc_data.trk_per_cyl *
1996 blk_per_trk);
1997
fc19f381
SH		 1998 dev_info(&device->cdev->dev,
1999 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2000 "%s\n", (block->bp_block >> 10),
2001 ((private->real_cyl *
2002 private->rdc_data.trk_per_cyl *
2003 blk_per_trk * (block->bp_block >> 9)) >> 1),
2004 ((blk_per_trk * block->bp_block) >> 10),
2005 private->uses_cdl ?
2006 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 2007
2008 return 0;
2009}
2010
8e09f215 2011static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 2012{
2013 struct dasd_eckd_private *private;
2014
8e09f215 2015 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 2016 if (private->init_cqr_status < 0)
8e09f215 2017 return dasd_eckd_start_analysis(block);
1da177e4 2018 else
8e09f215 2019 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2020}
2021
8e09f215
SW		 2022static int dasd_eckd_ready_to_online(struct dasd_device *device)
2023{
2024 return dasd_alias_add_device(device);
2025};
2026
2027static int dasd_eckd_online_to_ready(struct dasd_device *device)
2028{
501183f2 2029 cancel_work_sync(&device->reload_device);
25e2cf1c 2030 cancel_work_sync(&device->kick_validate);
8e09f215
SW		 2031 return dasd_alias_remove_device(device);
2032};
2033
1da177e4 2034static int
8e09f215 2035dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 2036{
2037 struct dasd_eckd_private *private;
2038
8e09f215
SW		 2039 private = (struct dasd_eckd_private *) block->base->private;
2040 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2041 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2042 0, block->bp_block);
1da177e4
LT		 2043 }
2044 geo->cylinders = private->rdc_data.no_cyl;
2045 geo->heads = private->rdc_data.trk_per_cyl;
2046 return 0;
2047}
2048
2049static struct dasd_ccw_req *
2050dasd_eckd_format_device(struct dasd_device * device,
2051 struct format_data_t * fdata)
2052{
2053 struct dasd_eckd_private *private;
2054 struct dasd_ccw_req *fcp;
2055 struct eckd_count *ect;
2056 struct ccw1 *ccw;
2057 void *data;
b44b0ab3
SW		 2058 int rpt;
2059 struct ch_t address;
1da177e4
LT		 2060 int cplength, datasize;
2061 int i;
f9a28f7b
JBJ		 2062 int intensity = 0;
2063 int r0_perm;
1da177e4
LT		 2064
2065 private = (struct dasd_eckd_private *) device->private;
2066 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
b44b0ab3
SW		 2067 set_ch_t(&address,
2068 fdata->start_unit / private->rdc_data.trk_per_cyl,
2069 fdata->start_unit % private->rdc_data.trk_per_cyl);
1da177e4
LT		 2070
2071 /* Sanity checks. */
2072 if (fdata->start_unit >=
b44b0ab3 2073 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
fc19f381
SH		 2074 dev_warn(&device->cdev->dev, "Start track number %d used in "
2075 "formatting is too big\n", fdata->start_unit);
1da177e4
LT		 2076 return ERR_PTR(-EINVAL);
2077 }
2078 if (fdata->start_unit > fdata->stop_unit) {
fc19f381
SH		 2079 dev_warn(&device->cdev->dev, "Start track %d used in "
2080 "formatting exceeds end track\n", fdata->start_unit);
1da177e4
LT		 2081 return ERR_PTR(-EINVAL);
2082 }
2083 if (dasd_check_blocksize(fdata->blksize) != 0) {
fc19f381
SH		 2084 dev_warn(&device->cdev->dev,
2085 "The DASD cannot be formatted with block size %d\n",
2086 fdata->blksize);
1da177e4
LT		 2087 return ERR_PTR(-EINVAL);
2088 }
2089
2090 /*
2091 * fdata->intensity is a bit string that tells us what to do:
2092 * Bit 0: write record zero
2093 * Bit 1: write home address, currently not supported
2094 * Bit 2: invalidate tracks
2095 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2096 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2097 * Only some bit combinations do make sense.
2098 */
f9a28f7b
JBJ		 2099 if (fdata->intensity & 0x10) {
2100 r0_perm = 0;
2101 intensity = fdata->intensity & ~0x10;
2102 } else {
2103 r0_perm = 1;
2104 intensity = fdata->intensity;
2105 }
2106 switch (intensity) {
1da177e4
LT		 2107 case 0x00: /* Normal format */
2108 case 0x08: /* Normal format, use cdl. */
2109 cplength = 2 + rpt;
2110 datasize = sizeof(struct DE_eckd_data) +
2111 sizeof(struct LO_eckd_data) +
2112 rpt * sizeof(struct eckd_count);
2113 break;
2114 case 0x01: /* Write record zero and format track. */
2115 case 0x09: /* Write record zero and format track, use cdl. */
2116 cplength = 3 + rpt;
2117 datasize = sizeof(struct DE_eckd_data) +
2118 sizeof(struct LO_eckd_data) +
2119 sizeof(struct eckd_count) +
2120 rpt * sizeof(struct eckd_count);
2121 break;
2122 case 0x04: /* Invalidate track. */
2123 case 0x0c: /* Invalidate track, use cdl. */
2124 cplength = 3;
2125 datasize = sizeof(struct DE_eckd_data) +
2126 sizeof(struct LO_eckd_data) +
2127 sizeof(struct eckd_count);
2128 break;
2129 default:
fc19f381
SH		 2130 dev_warn(&device->cdev->dev, "An I/O control call used "
2131 "incorrect flags 0x%x\n", fdata->intensity);
1da177e4
LT		 2132 return ERR_PTR(-EINVAL);
2133 }
2134 /* Allocate the format ccw request. */
68b781fe 2135 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 2136 if (IS_ERR(fcp))
2137 return fcp;
2138
2139 data = fcp->data;
2140 ccw = fcp->cpaddr;
2141
f9a28f7b 2142 switch (intensity & ~0x08) {
1da177e4
LT		 2143 case 0x00: /* Normal format. */
2144 define_extent(ccw++, (struct DE_eckd_data *) data,
2145 fdata->start_unit, fdata->start_unit,
2146 DASD_ECKD_CCW_WRITE_CKD, device);
f9a28f7b
JBJ		 2147 /* grant subsystem permission to format R0 */
2148 if (r0_perm)
2149 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1da177e4
LT		 2150 data += sizeof(struct DE_eckd_data);
2151 ccw[-1].flags |= CCW_FLAG_CC;
2152 locate_record(ccw++, (struct LO_eckd_data *) data,
2153 fdata->start_unit, 0, rpt,
2154 DASD_ECKD_CCW_WRITE_CKD, device,
2155 fdata->blksize);
2156 data += sizeof(struct LO_eckd_data);
2157 break;
2158 case 0x01: /* Write record zero + format track. */
2159 define_extent(ccw++, (struct DE_eckd_data *) data,
2160 fdata->start_unit, fdata->start_unit,
2161 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2162 device);
2163 data += sizeof(struct DE_eckd_data);
2164 ccw[-1].flags |= CCW_FLAG_CC;
2165 locate_record(ccw++, (struct LO_eckd_data *) data,
2166 fdata->start_unit, 0, rpt + 1,
2167 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
8e09f215 2168 device->block->bp_block);
1da177e4
LT		 2169 data += sizeof(struct LO_eckd_data);
2170 break;
2171 case 0x04: /* Invalidate track. */
2172 define_extent(ccw++, (struct DE_eckd_data *) data,
2173 fdata->start_unit, fdata->start_unit,
2174 DASD_ECKD_CCW_WRITE_CKD, device);
2175 data += sizeof(struct DE_eckd_data);
2176 ccw[-1].flags |= CCW_FLAG_CC;
2177 locate_record(ccw++, (struct LO_eckd_data *) data,
2178 fdata->start_unit, 0, 1,
2179 DASD_ECKD_CCW_WRITE_CKD, device, 8);
2180 data += sizeof(struct LO_eckd_data);
2181 break;
2182 }
f9a28f7b 2183 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2184 ect = (struct eckd_count *) data;
2185 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2186 ect->cyl = address.cyl;
2187 ect->head = address.head;
1da177e4
LT		 2188 ect->record = 0;
2189 ect->kl = 0;
2190 ect->dl = 8;
2191 ccw[-1].flags |= CCW_FLAG_CC;
2192 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2193 ccw->flags = CCW_FLAG_SLI;
2194 ccw->count = 8;
2195 ccw->cda = (__u32)(addr_t) ect;
2196 ccw++;
2197 }
f9a28f7b 2198 if ((intensity & ~0x08) & 0x04) { /* erase track */
1da177e4
LT		 2199 ect = (struct eckd_count *) data;
2200 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2201 ect->cyl = address.cyl;
2202 ect->head = address.head;
1da177e4
LT		 2203 ect->record = 1;
2204 ect->kl = 0;
2205 ect->dl = 0;
2206 ccw[-1].flags |= CCW_FLAG_CC;
2207 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2208 ccw->flags = CCW_FLAG_SLI;
2209 ccw->count = 8;
2210 ccw->cda = (__u32)(addr_t) ect;
2211 } else { /* write remaining records */
2212 for (i = 0; i < rpt; i++) {
2213 ect = (struct eckd_count *) data;
2214 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2215 ect->cyl = address.cyl;
2216 ect->head = address.head;
1da177e4
LT		 2217 ect->record = i + 1;
2218 ect->kl = 0;
2219 ect->dl = fdata->blksize;
2220 /* Check for special tracks 0-1 when formatting CDL */
f9a28f7b 2221 if ((intensity & 0x08) &&
1da177e4
LT		 2222 fdata->start_unit == 0) {
2223 if (i < 3) {
2224 ect->kl = 4;
2225 ect->dl = sizes_trk0[i] - 4;
138c014d 2226 }
1da177e4 2227 }
f9a28f7b 2228 if ((intensity & 0x08) &&
1da177e4
LT		 2229 fdata->start_unit == 1) {
2230 ect->kl = 44;
2231 ect->dl = LABEL_SIZE - 44;
2232 }
2233 ccw[-1].flags |= CCW_FLAG_CC;
2234 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2235 ccw->flags = CCW_FLAG_SLI;
2236 ccw->count = 8;
2237 ccw->cda = (__u32)(addr_t) ect;
2238 ccw++;
2239 }
2240 }
8e09f215
SW		 2241 fcp->startdev = device;
2242 fcp->memdev = device;
eb6e199b 2243 fcp->retries = 256;
1da177e4
LT		 2244 fcp->buildclk = get_clock();
2245 fcp->status = DASD_CQR_FILLED;
2246 return fcp;
2247}
2248
8e09f215 2249static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 2250{
8e09f215
SW		 2251 cqr->status = DASD_CQR_FILLED;
2252 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2253 dasd_eckd_reset_ccw_to_base_io(cqr);
2254 cqr->startdev = cqr->block->base;
a4d26c6a 2255 cqr->lpm = cqr->block->base->path_data.opm;
1da177e4 2256 }
8e09f215 2257};
1da177e4
LT		 2258
2259static dasd_erp_fn_t
2260dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2261{
8e09f215 2262 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 2263 struct ccw_device *cdev = device->cdev;
2264
2265 switch (cdev->id.cu_type) {
2266 case 0x3990:
2267 case 0x2105:
2268 case 0x2107:
2269 case 0x1750:
2270 return dasd_3990_erp_action;
2271 case 0x9343:
2272 case 0x3880:
2273 default:
2274 return dasd_default_erp_action;
2275 }
2276}
2277
2278static dasd_erp_fn_t
2279dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2280{
2281 return dasd_default_erp_postaction;
2282}
2283
5a27e60d
SW		 2284static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2285 struct dasd_ccw_req *cqr,
2286 struct irb *irb)
8e09f215
SW		 2287{
2288 char mask;
f3eb5384 2289 char *sense = NULL;
501183f2 2290 struct dasd_eckd_private *private;
8e09f215 2291
501183f2 2292 private = (struct dasd_eckd_private *) device->private;
8e09f215
SW		 2293 /* first of all check for state change pending interrupt */
2294 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 2295 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 2296 /*
2297 * for alias only, not in offline processing
2298 * and only if not suspended
2299 */
501183f2 2300 if (!device->block && private->lcu &&
25e2cf1c 2301 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 2302 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2303 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 2304 /*
2305 * the state change could be caused by an alias
2306 * reassignment remove device from alias handling
2307 * to prevent new requests from being scheduled on
2308 * the wrong alias device
2309 */
2310 dasd_alias_remove_device(device);
2311
2312 /* schedule worker to reload device */
2313 dasd_reload_device(device);
2314 }
8e09f215
SW		 2315 dasd_generic_handle_state_change(device);
2316 return;
2317 }
2318
a5a0061f 2319 sense = dasd_get_sense(irb);
5a27e60d
SW		 2320 if (!sense)
2321 return;
2322
2323 /* summary unit check */
c7a29e56 2324 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 2325 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
8e09f215
SW		 2326 dasd_alias_handle_summary_unit_check(device, irb);
2327 return;
2328 }
2329
f60c768c 2330 /* service information message SIM */
5a27e60d 2331 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 2332 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2333 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 2334 return;
2335 }
2336
5a27e60d
SW		 2337 /* loss of device reservation is handled via base devices only
2338 * as alias devices may be used with several bases
2339 */
c7a29e56
SW		 2340 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
2341 (sense[7] == 0x3F) &&
5a27e60d
SW		 2342 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
2343 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
2344 if (device->features & DASD_FEATURE_FAILONSLCK)
2345 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
2346 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
2347 dev_err(&device->cdev->dev,
2348 "The device reservation was lost\n");
ada3df91 2349 }
5a27e60d 2350}
f3eb5384
SW		 2351
2352static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
2353 struct dasd_device *startdev,
8e09f215 2354 struct dasd_block *block,
f3eb5384
SW		 2355 struct request *req,
2356 sector_t first_rec,
2357 sector_t last_rec,
2358 sector_t first_trk,
2359 sector_t last_trk,
2360 unsigned int first_offs,
2361 unsigned int last_offs,
2362 unsigned int blk_per_trk,
2363 unsigned int blksize)
1da177e4
LT		 2364{
2365 struct dasd_eckd_private *private;
2366 unsigned long *idaws;
2367 struct LO_eckd_data *LO_data;
2368 struct dasd_ccw_req *cqr;
2369 struct ccw1 *ccw;
5705f702 2370 struct req_iterator iter;
1da177e4
LT		 2371 struct bio_vec *bv;
2372 char *dst;
f3eb5384 2373 unsigned int off;
1da177e4 2374 int count, cidaw, cplength, datasize;
f3eb5384 2375 sector_t recid;
1da177e4 2376 unsigned char cmd, rcmd;
8e09f215
SW		 2377 int use_prefix;
2378 struct dasd_device *basedev;
1da177e4 2379
8e09f215
SW		 2380 basedev = block->base;
2381 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 2382 if (rq_data_dir(req) == READ)
2383 cmd = DASD_ECKD_CCW_READ_MT;
2384 else if (rq_data_dir(req) == WRITE)
2385 cmd = DASD_ECKD_CCW_WRITE_MT;
2386 else
2387 return ERR_PTR(-EINVAL);
f3eb5384 2388
1da177e4
LT		 2389 /* Check struct bio and count the number of blocks for the request. */
2390 count = 0;
2391 cidaw = 0;
5705f702 2392 rq_for_each_segment(bv, req, iter) {
6c92e699
JA		 2393 if (bv->bv_len & (blksize - 1))
2394 /* Eckd can only do full blocks. */
2395 return ERR_PTR(-EINVAL);
8e09f215 2396 count += bv->bv_len >> (block->s2b_shift + 9);
347a8dc3 2397#if defined(CONFIG_64BIT)
6c92e699 2398 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
8e09f215 2399 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1da177e4 2400#endif
1da177e4
LT		 2401 }
2402 /* Paranoia. */
2403 if (count != last_rec - first_rec + 1)
2404 return ERR_PTR(-EINVAL);
8e09f215
SW		 2405
2406 /* use the prefix command if available */
2407 use_prefix = private->features.feature[8] & 0x01;
2408 if (use_prefix) {
2409 /* 1x prefix + number of blocks */
2410 cplength = 2 + count;
2411 /* 1x prefix + cidaws*sizeof(long) */
2412 datasize = sizeof(struct PFX_eckd_data) +
2413 sizeof(struct LO_eckd_data) +
2414 cidaw * sizeof(unsigned long);
2415 } else {
2416 /* 1x define extent + 1x locate record + number of blocks */
2417 cplength = 2 + count;
2418 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2419 datasize = sizeof(struct DE_eckd_data) +
2420 sizeof(struct LO_eckd_data) +
2421 cidaw * sizeof(unsigned long);
2422 }
1da177e4
LT		 2423 /* Find out the number of additional locate record ccws for cdl. */
2424 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
2425 if (last_rec >= 2*blk_per_trk)
2426 count = 2*blk_per_trk - first_rec;
2427 cplength += count;
2428 datasize += count*sizeof(struct LO_eckd_data);
2429 }
2430 /* Allocate the ccw request. */
68b781fe
SH		 2431 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2432 startdev);
1da177e4
LT		 2433 if (IS_ERR(cqr))
2434 return cqr;
2435 ccw = cqr->cpaddr;
8e09f215
SW		 2436 /* First ccw is define extent or prefix. */
2437 if (use_prefix) {
2438 if (prefix(ccw++, cqr->data, first_trk,
2439 last_trk, cmd, basedev, startdev) == -EAGAIN) {
2440 /* Clock not in sync and XRC is enabled.
2441 * Try again later.
2442 */
2443 dasd_sfree_request(cqr, startdev);
2444 return ERR_PTR(-EAGAIN);
2445 }
2446 idaws = (unsigned long *) (cqr->data +
2447 sizeof(struct PFX_eckd_data));
2448 } else {
2449 if (define_extent(ccw++, cqr->data, first_trk,
b38f27e8 2450 last_trk, cmd, basedev) == -EAGAIN) {
8e09f215
SW		 2451 /* Clock not in sync and XRC is enabled.
2452 * Try again later.
2453 */
2454 dasd_sfree_request(cqr, startdev);
2455 return ERR_PTR(-EAGAIN);
2456 }
2457 idaws = (unsigned long *) (cqr->data +
2458 sizeof(struct DE_eckd_data));
d54853ef 2459 }
1da177e4 2460 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 2461 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
2462 recid = first_rec;
2463 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
2464 /* Only standard blocks so there is just one locate record. */
2465 ccw[-1].flags |= CCW_FLAG_CC;
2466 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 2467 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 2468 }
5705f702 2469 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 2470 dst = page_address(bv->bv_page) + bv->bv_offset;
2471 if (dasd_page_cache) {
2472 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 2473 GFP_DMA | __GFP_NOWARN);
1da177e4
LT		 2474 if (copy && rq_data_dir(req) == WRITE)
2475 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
2476 if (copy)
2477 dst = copy + bv->bv_offset;
2478 }
2479 for (off = 0; off < bv->bv_len; off += blksize) {
2480 sector_t trkid = recid;
2481 unsigned int recoffs = sector_div(trkid, blk_per_trk);
2482 rcmd = cmd;
2483 count = blksize;
2484 /* Locate record for cdl special block ? */
2485 if (private->uses_cdl && recid < 2*blk_per_trk) {
2486 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
2487 rcmd |= 0x8;
2488 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 2489 if (count < blksize &&
2490 rq_data_dir(req) == READ)
1da177e4
LT		 2491 memset(dst + count, 0xe5,
2492 blksize - count);
2493 }
2494 ccw[-1].flags |= CCW_FLAG_CC;
2495 locate_record(ccw++, LO_data++,
2496 trkid, recoffs + 1,
8e09f215 2497 1, rcmd, basedev, count);
1da177e4
LT		 2498 }
2499 /* Locate record for standard blocks ? */
2500 if (private->uses_cdl && recid == 2*blk_per_trk) {
2501 ccw[-1].flags |= CCW_FLAG_CC;
2502 locate_record(ccw++, LO_data++,
2503 trkid, recoffs + 1,
2504 last_rec - recid + 1,
8e09f215 2505 cmd, basedev, count);
1da177e4
LT		 2506 }
2507 /* Read/write ccw. */
2508 ccw[-1].flags |= CCW_FLAG_CC;
2509 ccw->cmd_code = rcmd;
2510 ccw->count = count;
2511 if (idal_is_needed(dst, blksize)) {
2512 ccw->cda = (__u32)(addr_t) idaws;
2513 ccw->flags = CCW_FLAG_IDA;
2514 idaws = idal_create_words(idaws, dst, blksize);
2515 } else {
2516 ccw->cda = (__u32)(addr_t) dst;
2517 ccw->flags = 0;
2518 }
2519 ccw++;
2520 dst += blksize;
2521 recid++;
2522 }
2523 }
13de227b
HS		 2524 if (blk_noretry_request(req) ||
2525 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 2526 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 2527 cqr->startdev = startdev;
2528 cqr->memdev = startdev;
2529 cqr->block = block;
7c8faa86 2530 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2531 cqr->lpm = startdev->path_data.ppm;
1da177e4
LT		 2532 cqr->retries = 256;
2533 cqr->buildclk = get_clock();
2534 cqr->status = DASD_CQR_FILLED;
2535 return cqr;
2536}
2537
f3eb5384
SW		 2538static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
2539 struct dasd_device *startdev,
2540 struct dasd_block *block,
2541 struct request *req,
2542 sector_t first_rec,
2543 sector_t last_rec,
2544 sector_t first_trk,
2545 sector_t last_trk,
2546 unsigned int first_offs,
2547 unsigned int last_offs,
2548 unsigned int blk_per_trk,
2549 unsigned int blksize)
2550{
f3eb5384
SW		 2551 unsigned long *idaws;
2552 struct dasd_ccw_req *cqr;
2553 struct ccw1 *ccw;
2554 struct req_iterator iter;
2555 struct bio_vec *bv;
2556 char *dst, *idaw_dst;
2557 unsigned int cidaw, cplength, datasize;
2558 unsigned int tlf;
2559 sector_t recid;
2560 unsigned char cmd;
2561 struct dasd_device *basedev;
2562 unsigned int trkcount, count, count_to_trk_end;
2563 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2564 unsigned char new_track, end_idaw;
2565 sector_t trkid;
2566 unsigned int recoffs;
2567
2568 basedev = block->base;
f3eb5384
SW		 2569 if (rq_data_dir(req) == READ)
2570 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2571 else if (rq_data_dir(req) == WRITE)
2572 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2573 else
2574 return ERR_PTR(-EINVAL);
2575
2576 /* Track based I/O needs IDAWs for each page, and not just for
2577 * 64 bit addresses. We need additional idals for pages
2578 * that get filled from two tracks, so we use the number
2579 * of records as upper limit.
2580 */
2581 cidaw = last_rec - first_rec + 1;
2582 trkcount = last_trk - first_trk + 1;
2583
2584 /* 1x prefix + one read/write ccw per track */
2585 cplength = 1 + trkcount;
2586
2587 /* on 31-bit we need space for two 32 bit addresses per page
2588 * on 64-bit one 64 bit address
2589 */
2590 datasize = sizeof(struct PFX_eckd_data) +
2591 cidaw * sizeof(unsigned long long);
2592
2593 /* Allocate the ccw request. */
68b781fe
SH		 2594 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2595 startdev);
f3eb5384
SW		 2596 if (IS_ERR(cqr))
2597 return cqr;
2598 ccw = cqr->cpaddr;
2599 /* transfer length factor: how many bytes to read from the last track */
2600 if (first_trk == last_trk)
2601 tlf = last_offs - first_offs + 1;
2602 else
2603 tlf = last_offs + 1;
2604 tlf *= blksize;
2605
2606 if (prefix_LRE(ccw++, cqr->data, first_trk,
2607 last_trk, cmd, basedev, startdev,
2608 1 /* format */, first_offs + 1,
2609 trkcount, blksize,
2610 tlf) == -EAGAIN) {
2611 /* Clock not in sync and XRC is enabled.
2612 * Try again later.
2613 */
2614 dasd_sfree_request(cqr, startdev);
2615 return ERR_PTR(-EAGAIN);
2616 }
2617
2618 /*
2619 * The translation of request into ccw programs must meet the
2620 * following conditions:
2621 * - all idaws but the first and the last must address full pages
2622 * (or 2K blocks on 31-bit)
2623 * - the scope of a ccw and it's idal ends with the track boundaries
2624 */
2625 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2626 recid = first_rec;
2627 new_track = 1;
2628 end_idaw = 0;
2629 len_to_track_end = 0;
246ccea1 2630 idaw_dst = NULL;
f3eb5384
SW		 2631 idaw_len = 0;
2632 rq_for_each_segment(bv, req, iter) {
2633 dst = page_address(bv->bv_page) + bv->bv_offset;
2634 seg_len = bv->bv_len;
2635 while (seg_len) {
2636 if (new_track) {
2637 trkid = recid;
2638 recoffs = sector_div(trkid, blk_per_trk);
2639 count_to_trk_end = blk_per_trk - recoffs;
2640 count = min((last_rec - recid + 1),
2641 (sector_t)count_to_trk_end);
2642 len_to_track_end = count * blksize;
2643 ccw[-1].flags |= CCW_FLAG_CC;
2644 ccw->cmd_code = cmd;
2645 ccw->count = len_to_track_end;
2646 ccw->cda = (__u32)(addr_t)idaws;
2647 ccw->flags = CCW_FLAG_IDA;
2648 ccw++;
2649 recid += count;
2650 new_track = 0;
52db45c3
SW		 2651 /* first idaw for a ccw may start anywhere */
2652 if (!idaw_dst)
2653 idaw_dst = dst;
f3eb5384 2654 }
52db45c3
SW		 2655 /* If we start a new idaw, we must make sure that it
2656 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2657 * If we continue an idaw, we must make sure that the
2658 * current segment begins where the so far accumulated
2659 * idaw ends
2660 */
52db45c3
SW		 2661 if (!idaw_dst) {
2662 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2663 dasd_sfree_request(cqr, startdev);
2664 return ERR_PTR(-ERANGE);
2665 } else
2666 idaw_dst = dst;
2667 }
f3eb5384
SW		 2668 if ((idaw_dst + idaw_len) != dst) {
2669 dasd_sfree_request(cqr, startdev);
2670 return ERR_PTR(-ERANGE);
2671 }
2672 part_len = min(seg_len, len_to_track_end);
2673 seg_len -= part_len;
2674 dst += part_len;
2675 idaw_len += part_len;
2676 len_to_track_end -= part_len;
2677 /* collected memory area ends on an IDA_BLOCK border,
2678 * -> create an idaw
2679 * idal_create_words will handle cases where idaw_len
2680 * is larger then IDA_BLOCK_SIZE
2681 */
2682 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2683 end_idaw = 1;
2684 /* We also need to end the idaw at track end */
2685 if (!len_to_track_end) {
2686 new_track = 1;
2687 end_idaw = 1;
2688 }
2689 if (end_idaw) {
2690 idaws = idal_create_words(idaws, idaw_dst,
2691 idaw_len);
246ccea1 2692 idaw_dst = NULL;
f3eb5384
SW		 2693 idaw_len = 0;
2694 end_idaw = 0;
2695 }
2696 }
2697 }
2698
2699 if (blk_noretry_request(req) ||
2700 block->base->features & DASD_FEATURE_FAILFAST)
2701 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2702 cqr->startdev = startdev;
2703 cqr->memdev = startdev;
2704 cqr->block = block;
7c8faa86 2705 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2706 cqr->lpm = startdev->path_data.ppm;
f3eb5384
SW		 2707 cqr->retries = 256;
2708 cqr->buildclk = get_clock();
2709 cqr->status = DASD_CQR_FILLED;
2710 return cqr;
2711}
2712
2713static int prepare_itcw(struct itcw *itcw,
2714 unsigned int trk, unsigned int totrk, int cmd,
2715 struct dasd_device *basedev,
2716 struct dasd_device *startdev,
2717 unsigned int rec_on_trk, int count,
2718 unsigned int blksize,
2719 unsigned int total_data_size,
2720 unsigned int tlf,
2721 unsigned int blk_per_trk)
2722{
2723 struct PFX_eckd_data pfxdata;
2724 struct dasd_eckd_private *basepriv, *startpriv;
2725 struct DE_eckd_data *dedata;
2726 struct LRE_eckd_data *lredata;
2727 struct dcw *dcw;
2728
2729 u32 begcyl, endcyl;
2730 u16 heads, beghead, endhead;
2731 u8 pfx_cmd;
2732
2733 int rc = 0;
2734 int sector = 0;
2735 int dn, d;
2736
2737
2738 /* setup prefix data */
2739 basepriv = (struct dasd_eckd_private *) basedev->private;
2740 startpriv = (struct dasd_eckd_private *) startdev->private;
2741 dedata = &pfxdata.define_extent;
2742 lredata = &pfxdata.locate_record;
2743
2744 memset(&pfxdata, 0, sizeof(pfxdata));
2745 pfxdata.format = 1; /* PFX with LRE */
2746 pfxdata.base_address = basepriv->ned->unit_addr;
2747 pfxdata.base_lss = basepriv->ned->ID;
2748 pfxdata.validity.define_extent = 1;
2749
2750 /* private uid is kept up to date, conf_data may be outdated */
2751 if (startpriv->uid.type != UA_BASE_DEVICE) {
2752 pfxdata.validity.verify_base = 1;
2753 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2754 pfxdata.validity.hyper_pav = 1;
2755 }
2756
2757 switch (cmd) {
2758 case DASD_ECKD_CCW_READ_TRACK_DATA:
2759 dedata->mask.perm = 0x1;
2760 dedata->attributes.operation = basepriv->attrib.operation;
2761 dedata->blk_size = blksize;
2762 dedata->ga_extended |= 0x42;
2763 lredata->operation.orientation = 0x0;
2764 lredata->operation.operation = 0x0C;
2765 lredata->auxiliary.check_bytes = 0x01;
2766 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2767 break;
2768 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2769 dedata->mask.perm = 0x02;
2770 dedata->attributes.operation = basepriv->attrib.operation;
2771 dedata->blk_size = blksize;
2772 rc = check_XRC_on_prefix(&pfxdata, basedev);
2773 dedata->ga_extended |= 0x42;
2774 lredata->operation.orientation = 0x0;
2775 lredata->operation.operation = 0x3F;
2776 lredata->extended_operation = 0x23;
2777 lredata->auxiliary.check_bytes = 0x2;
2778 pfx_cmd = DASD_ECKD_CCW_PFX;
2779 break;
2780 default:
2781 DBF_DEV_EVENT(DBF_ERR, basedev,
2782 "prepare itcw, unknown opcode 0x%x", cmd);
2783 BUG();
2784 break;
2785 }
2786 if (rc)
2787 return rc;
2788
2789 dedata->attributes.mode = 0x3; /* ECKD */
2790
2791 heads = basepriv->rdc_data.trk_per_cyl;
2792 begcyl = trk / heads;
2793 beghead = trk % heads;
2794 endcyl = totrk / heads;
2795 endhead = totrk % heads;
2796
2797 /* check for sequential prestage - enhance cylinder range */
2798 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2799 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2800
2801 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2802 endcyl += basepriv->attrib.nr_cyl;
2803 else
2804 endcyl = (basepriv->real_cyl - 1);
2805 }
2806
2807 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2808 set_ch_t(&dedata->end_ext, endcyl, endhead);
2809
2810 dedata->ep_format = 0x20; /* records per track is valid */
2811 dedata->ep_rec_per_track = blk_per_trk;
2812
2813 if (rec_on_trk) {
2814 switch (basepriv->rdc_data.dev_type) {
2815 case 0x3390:
2816 dn = ceil_quot(blksize + 6, 232);
2817 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2818 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2819 break;
2820 case 0x3380:
2821 d = 7 + ceil_quot(blksize + 12, 32);
2822 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2823 break;
2824 }
2825 }
2826
2827 lredata->auxiliary.length_valid = 1;
2828 lredata->auxiliary.length_scope = 1;
2829 lredata->auxiliary.imbedded_ccw_valid = 1;
2830 lredata->length = tlf;
2831 lredata->imbedded_ccw = cmd;
2832 lredata->count = count;
2833 lredata->sector = sector;
2834 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2835 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2836 lredata->search_arg.head = lredata->seek_addr.head;
2837 lredata->search_arg.record = rec_on_trk;
2838
2839 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2840 &pfxdata, sizeof(pfxdata), total_data_size);
364c18d8 2841 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0;
f3eb5384
SW		 2842}
2843
2844static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2845 struct dasd_device *startdev,
2846 struct dasd_block *block,
2847 struct request *req,
2848 sector_t first_rec,
2849 sector_t last_rec,
2850 sector_t first_trk,
2851 sector_t last_trk,
2852 unsigned int first_offs,
2853 unsigned int last_offs,
2854 unsigned int blk_per_trk,
2855 unsigned int blksize)
2856{
f3eb5384
SW		 2857 struct dasd_ccw_req *cqr;
2858 struct req_iterator iter;
2859 struct bio_vec *bv;
2860 char *dst;
2861 unsigned int trkcount, ctidaw;
2862 unsigned char cmd;
2863 struct dasd_device *basedev;
2864 unsigned int tlf;
2865 struct itcw *itcw;
2866 struct tidaw *last_tidaw = NULL;
2867 int itcw_op;
2868 size_t itcw_size;
ef19298b
SW		 2869 u8 tidaw_flags;
2870 unsigned int seg_len, part_len, len_to_track_end;
2871 unsigned char new_track;
2872 sector_t recid, trkid;
2873 unsigned int offs;
2874 unsigned int count, count_to_trk_end;
cd10502b 2875 int ret;
f3eb5384
SW		 2876
2877 basedev = block->base;
f3eb5384
SW		 2878 if (rq_data_dir(req) == READ) {
2879 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2880 itcw_op = ITCW_OP_READ;
2881 } else if (rq_data_dir(req) == WRITE) {
2882 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2883 itcw_op = ITCW_OP_WRITE;
2884 } else
2885 return ERR_PTR(-EINVAL);
2886
2887 /* trackbased I/O needs address all memory via TIDAWs,
2888 * not just for 64 bit addresses. This allows us to map
2889 * each segment directly to one tidaw.
ef19298b
SW		 2890 * In the case of write requests, additional tidaws may
2891 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 2892 */
2893 trkcount = last_trk - first_trk + 1;
2894 ctidaw = 0;
2895 rq_for_each_segment(bv, req, iter) {
2896 ++ctidaw;
2897 }
ef19298b
SW		 2898 if (rq_data_dir(req) == WRITE)
2899 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 2900
2901 /* Allocate the ccw request. */
2902 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 2903 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 2904 if (IS_ERR(cqr))
2905 return cqr;
2906
f3eb5384
SW		 2907 /* transfer length factor: how many bytes to read from the last track */
2908 if (first_trk == last_trk)
2909 tlf = last_offs - first_offs + 1;
2910 else
2911 tlf = last_offs + 1;
2912 tlf *= blksize;
2913
2914 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 2915 if (IS_ERR(itcw)) {
cd10502b
JL		 2916 ret = -EINVAL;
2917 goto out_error;
ef19298b 2918 }
f3eb5384 2919 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 2920 if (prepare_itcw(itcw, first_trk, last_trk,
2921 cmd, basedev, startdev,
2922 first_offs + 1,
2923 trkcount, blksize,
2924 (last_rec - first_rec + 1) * blksize,
2925 tlf, blk_per_trk) == -EAGAIN) {
2926 /* Clock not in sync and XRC is enabled.
2927 * Try again later.
2928 */
cd10502b
JL		 2929 ret = -EAGAIN;
2930 goto out_error;
f3eb5384 2931 }
d54cddb6 2932 len_to_track_end = 0;
f3eb5384
SW		 2933 /*
2934 * A tidaw can address 4k of memory, but must not cross page boundaries
2935 * We can let the block layer handle this by setting
2936 * blk_queue_segment_boundary to page boundaries and
2937 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 2938 * For write requests, a TIDAW must not cross track boundaries, because
2939 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 2940 */
ef19298b
SW		 2941 if (rq_data_dir(req) == WRITE) {
2942 new_track = 1;
2943 recid = first_rec;
2944 rq_for_each_segment(bv, req, iter) {
2945 dst = page_address(bv->bv_page) + bv->bv_offset;
2946 seg_len = bv->bv_len;
2947 while (seg_len) {
2948 if (new_track) {
2949 trkid = recid;
2950 offs = sector_div(trkid, blk_per_trk);
2951 count_to_trk_end = blk_per_trk - offs;
2952 count = min((last_rec - recid + 1),
2953 (sector_t)count_to_trk_end);
2954 len_to_track_end = count * blksize;
2955 recid += count;
2956 new_track = 0;
2957 }
2958 part_len = min(seg_len, len_to_track_end);
2959 seg_len -= part_len;
2960 len_to_track_end -= part_len;
2961 /* We need to end the tidaw at track end */
2962 if (!len_to_track_end) {
2963 new_track = 1;
2964 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
2965 } else
2966 tidaw_flags = 0;
2967 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
2968 dst, part_len);
cd10502b
JL		 2969 if (IS_ERR(last_tidaw)) {
2970 ret = -EINVAL;
2971 goto out_error;
2972 }
ef19298b
SW		 2973 dst += part_len;
2974 }
2975 }
2976 } else {
2977 rq_for_each_segment(bv, req, iter) {
2978 dst = page_address(bv->bv_page) + bv->bv_offset;
2979 last_tidaw = itcw_add_tidaw(itcw, 0x00,
2980 dst, bv->bv_len);
cd10502b
JL		 2981 if (IS_ERR(last_tidaw)) {
2982 ret = -EINVAL;
2983 goto out_error;
2984 }
ef19298b 2985 }
f3eb5384 2986 }
ef19298b
SW		 2987 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2988 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 2989 itcw_finalize(itcw);
2990
2991 if (blk_noretry_request(req) ||
2992 block->base->features & DASD_FEATURE_FAILFAST)
2993 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 2994 cqr->cpmode = 1;
f3eb5384
SW		 2995 cqr->startdev = startdev;
2996 cqr->memdev = startdev;
2997 cqr->block = block;
7c8faa86 2998 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
a4d26c6a 2999 cqr->lpm = startdev->path_data.ppm;
f3eb5384
SW		 3000 cqr->retries = 256;
3001 cqr->buildclk = get_clock();
3002 cqr->status = DASD_CQR_FILLED;
3003 return cqr;
cd10502b
JL		 3004out_error:
3005 dasd_sfree_request(cqr, startdev);
3006 return ERR_PTR(ret);
f3eb5384
SW		 3007}
3008
3009static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3010 struct dasd_block *block,
3011 struct request *req)
3012{
ef19298b 3013 int cmdrtd, cmdwtd;
f3eb5384 3014 int use_prefix;
ef19298b 3015 int fcx_multitrack;
45b44d76 3016 struct dasd_eckd_private *private;
f3eb5384
SW		 3017 struct dasd_device *basedev;
3018 sector_t first_rec, last_rec;
3019 sector_t first_trk, last_trk;
3020 unsigned int first_offs, last_offs;
3021 unsigned int blk_per_trk, blksize;
3022 int cdlspecial;
ef19298b 3023 unsigned int data_size;
f3eb5384
SW		 3024 struct dasd_ccw_req *cqr;
3025
3026 basedev = block->base;
3027 private = (struct dasd_eckd_private *) basedev->private;
3028
3029 /* Calculate number of blocks/records per track. */
3030 blksize = block->bp_block;
3031 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 3032 if (blk_per_trk == 0)
3033 return ERR_PTR(-EINVAL);
f3eb5384 3034 /* Calculate record id of first and last block. */
83096ebf 3035 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 3036 first_offs = sector_div(first_trk, blk_per_trk);
3037 last_rec = last_trk =
83096ebf 3038 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 3039 last_offs = sector_div(last_trk, blk_per_trk);
3040 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3041
ef19298b
SW		 3042 fcx_multitrack = private->features.feature[40] & 0x20;
3043 data_size = blk_rq_bytes(req);
3044 /* tpm write request add CBC data on each track boundary */
3045 if (rq_data_dir(req) == WRITE)
3046 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 3047
3048 /* is read track data and write track data in command mode supported? */
3049 cmdrtd = private->features.feature[9] & 0x20;
3050 cmdwtd = private->features.feature[12] & 0x40;
3051 use_prefix = private->features.feature[8] & 0x01;
3052
3053 cqr = NULL;
3054 if (cdlspecial || dasd_page_cache) {
3055 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 3056 } else if ((data_size <= private->fcx_max_data)
3057 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 3058 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3059 first_rec, last_rec,
3060 first_trk, last_trk,
3061 first_offs, last_offs,
3062 blk_per_trk, blksize);
ef19298b
SW		 3063 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3064 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3065 cqr = NULL;
3066 } else if (use_prefix &&
3067 (((rq_data_dir(req) == READ) && cmdrtd) ||
3068 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3069 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3070 first_rec, last_rec,
3071 first_trk, last_trk,
3072 first_offs, last_offs,
3073 blk_per_trk, blksize);
ef19298b
SW		 3074 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3075 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3076 cqr = NULL;
3077 }
3078 if (!cqr)
3079 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3080 first_rec, last_rec,
3081 first_trk, last_trk,
3082 first_offs, last_offs,
3083 blk_per_trk, blksize);
3084 return cqr;
3085}
3086
e4dbb0f2
SH		 3087static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
3088 struct dasd_block *block,
3089 struct request *req)
3090{
e4dbb0f2
SH		 3091 unsigned long *idaws;
3092 struct dasd_device *basedev;
3093 struct dasd_ccw_req *cqr;
3094 struct ccw1 *ccw;
3095 struct req_iterator iter;
3096 struct bio_vec *bv;
3097 char *dst;
3098 unsigned char cmd;
3099 unsigned int trkcount;
3100 unsigned int seg_len, len_to_track_end;
3101 unsigned int first_offs;
3102 unsigned int cidaw, cplength, datasize;
3103 sector_t first_trk, last_trk;
3104 unsigned int pfx_datasize;
3105
3106 /*
3107 * raw track access needs to be mutiple of 64k and on 64k boundary
3108 */
3109 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) {
3110 cqr = ERR_PTR(-EINVAL);
3111 goto out;
3112 }
3113 if (((blk_rq_pos(req) + blk_rq_sectors(req)) %
3114 DASD_RAW_SECTORS_PER_TRACK) != 0) {
3115 cqr = ERR_PTR(-EINVAL);
3116 goto out;
3117 }
3118
3119 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3120 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3121 DASD_RAW_SECTORS_PER_TRACK;
3122 trkcount = last_trk - first_trk + 1;
3123 first_offs = 0;
3124 basedev = block->base;
e4dbb0f2
SH		 3125
3126 if (rq_data_dir(req) == READ)
3127 cmd = DASD_ECKD_CCW_READ_TRACK;
3128 else if (rq_data_dir(req) == WRITE)
3129 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3130 else {
3131 cqr = ERR_PTR(-EINVAL);
3132 goto out;
3133 }
3134
3135 /*
3136 * Raw track based I/O needs IDAWs for each page,
3137 * and not just for 64 bit addresses.
3138 */
3139 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3140
3141 /* 1x prefix + one read/write ccw per track */
3142 cplength = 1 + trkcount;
3143
3144 /*
3145 * struct PFX_eckd_data has up to 2 byte as extended parameter
3146 * this is needed for write full track and has to be mentioned
25985edc 3147 * separately
e4dbb0f2
SH		 3148 * add 8 instead of 2 to keep 8 byte boundary
3149 */
3150 pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
3151
3152 datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
3153
3154 /* Allocate the ccw request. */
3155 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3156 datasize, startdev);
3157 if (IS_ERR(cqr))
3158 goto out;
3159 ccw = cqr->cpaddr;
3160
3161 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
3162 basedev, startdev, 1 /* format */, first_offs + 1,
3163 trkcount, 0, 0) == -EAGAIN) {
3164 /* Clock not in sync and XRC is enabled.
3165 * Try again later.
3166 */
3167 dasd_sfree_request(cqr, startdev);
3168 cqr = ERR_PTR(-EAGAIN);
3169 goto out;
3170 }
3171
3172 idaws = (unsigned long *)(cqr->data + pfx_datasize);
3173
3174 len_to_track_end = 0;
3175
3176 rq_for_each_segment(bv, req, iter) {
3177 dst = page_address(bv->bv_page) + bv->bv_offset;
3178 seg_len = bv->bv_len;
3179 if (!len_to_track_end) {
3180 ccw[-1].flags |= CCW_FLAG_CC;
3181 ccw->cmd_code = cmd;
3182 /* maximum 3390 track size */
3183 ccw->count = 57326;
3184 /* 64k map to one track */
3185 len_to_track_end = 65536;
3186 ccw->cda = (__u32)(addr_t)idaws;
3187 ccw->flags |= CCW_FLAG_IDA;
3188 ccw->flags |= CCW_FLAG_SLI;
3189 ccw++;
3190 }
3191 len_to_track_end -= seg_len;
3192 idaws = idal_create_words(idaws, dst, seg_len);
3193 }
3194
3195 if (blk_noretry_request(req) ||
3196 block->base->features & DASD_FEATURE_FAILFAST)
3197 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3198 cqr->startdev = startdev;
3199 cqr->memdev = startdev;
3200 cqr->block = block;
3201 cqr->expires = startdev->default_expires * HZ;
3202 cqr->lpm = startdev->path_data.ppm;
3203 cqr->retries = 256;
3204 cqr->buildclk = get_clock();
3205 cqr->status = DASD_CQR_FILLED;
3206
3207 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
3208 cqr = NULL;
3209out:
3210 return cqr;
3211}
3212
3213
1da177e4
LT		 3214static int
3215dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3216{
3217 struct dasd_eckd_private *private;
3218 struct ccw1 *ccw;
5705f702 3219 struct req_iterator iter;
1da177e4
LT		 3220 struct bio_vec *bv;
3221 char *dst, *cda;
3222 unsigned int blksize, blk_per_trk, off;
3223 sector_t recid;
5705f702 3224 int status;
1da177e4
LT		 3225
3226 if (!dasd_page_cache)
3227 goto out;
8e09f215
SW		 3228 private = (struct dasd_eckd_private *) cqr->block->base->private;
3229 blksize = cqr->block->bp_block;
1da177e4 3230 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 3231 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 3232 ccw = cqr->cpaddr;
3233 /* Skip over define extent & locate record. */
3234 ccw++;
3235 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3236 ccw++;
5705f702 3237 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 3238 dst = page_address(bv->bv_page) + bv->bv_offset;
3239 for (off = 0; off < bv->bv_len; off += blksize) {
3240 /* Skip locate record. */
3241 if (private->uses_cdl && recid <= 2*blk_per_trk)
3242 ccw++;
3243 if (dst) {
3244 if (ccw->flags & CCW_FLAG_IDA)
3245 cda = *((char **)((addr_t) ccw->cda));
3246 else
3247 cda = (char *)((addr_t) ccw->cda);
3248 if (dst != cda) {
3249 if (rq_data_dir(req) == READ)
3250 memcpy(dst, cda, bv->bv_len);
3251 kmem_cache_free(dasd_page_cache,
3252 (void *)((addr_t)cda & PAGE_MASK));
3253 }
3254 dst = NULL;
3255 }
3256 ccw++;
3257 recid++;
3258 }
3259 }
3260out:
3261 status = cqr->status == DASD_CQR_DONE;
8e09f215 3262 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3263 return status;
3264}
3265
8e09f215 3266/*
f3eb5384 3267 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 3268 *
3269 * Note that this is not enough to restart the cqr!
3270 * Either reset cqr->startdev as well (summary unit check handling)
3271 * or restart via separate cqr (as in ERP handling).
3272 */
3273void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3274{
3275 struct ccw1 *ccw;
3276 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 3277 struct tcw *tcw;
3278 struct tccb *tccb;
3279 struct dcw *dcw;
3280
3281 if (cqr->cpmode == 1) {
3282 tcw = cqr->cpaddr;
3283 tccb = tcw_get_tccb(tcw);
3284 dcw = (struct dcw *)&tccb->tca[0];
3285 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 3286 pfxdata->validity.verify_base = 0;
3287 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 3288 } else {
3289 ccw = cqr->cpaddr;
3290 pfxdata = cqr->data;
3291 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
3292 pfxdata->validity.verify_base = 0;
3293 pfxdata->validity.hyper_pav = 0;
3294 }
8e09f215
SW		 3295 }
3296}
3297
3298#define DASD_ECKD_CHANQ_MAX_SIZE 4
3299
3300static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
3301 struct dasd_block *block,
3302 struct request *req)
3303{
3304 struct dasd_eckd_private *private;
3305 struct dasd_device *startdev;
3306 unsigned long flags;
3307 struct dasd_ccw_req *cqr;
3308
3309 startdev = dasd_alias_get_start_dev(base);
3310 if (!startdev)
3311 startdev = base;
3312 private = (struct dasd_eckd_private *) startdev->private;
3313 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
3314 return ERR_PTR(-EBUSY);
3315
3316 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
3317 private->count++;
e4dbb0f2
SH		 3318 if ((base->features & DASD_FEATURE_USERAW))
3319 cqr = dasd_raw_build_cp(startdev, block, req);
3320 else
3321 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 3322 if (IS_ERR(cqr))
3323 private->count--;
3324 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
3325 return cqr;
3326}
3327
3328static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
3329 struct request *req)
3330{
3331 struct dasd_eckd_private *private;
3332 unsigned long flags;
3333
3334 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
3335 private = (struct dasd_eckd_private *) cqr->memdev->private;
3336 private->count--;
3337 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
3338 return dasd_eckd_free_cp(cqr, req);
3339}
3340
1da177e4
LT		 3341static int
3342dasd_eckd_fill_info(struct dasd_device * device,
3343 struct dasd_information2_t * info)
3344{
3345 struct dasd_eckd_private *private;
3346
3347 private = (struct dasd_eckd_private *) device->private;
3348 info->label_block = 2;
3349 info->FBA_layout = private->uses_cdl ? 0 : 1;
3350 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
3351 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
3352 memcpy(info->characteristics, &private->rdc_data,
3353 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 3354 info->confdata_size = min((unsigned long)private->conf_len,
3355 sizeof(info->configuration_data));
3356 memcpy(info->configuration_data, private->conf_data,
3357 info->confdata_size);
1da177e4
LT		 3358 return 0;
3359}
3360
3361/*
3362 * SECTION: ioctl functions for eckd devices.
3363 */
3364
3365/*
3366 * Release device ioctl.
138c014d 3367 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 3368 * (see dasd_eckd_reserve) device.
3369 */
3370static int
1107ccfb 3371dasd_eckd_release(struct dasd_device *device)
1da177e4 3372{
1da177e4
LT		 3373 struct dasd_ccw_req *cqr;
3374 int rc;
f3eb5384 3375 struct ccw1 *ccw;
f932bcea 3376 int useglobal;
1da177e4
LT		 3377
3378 if (!capable(CAP_SYS_ADMIN))
3379 return -EACCES;
3380
f932bcea 3381 useglobal = 0;
68b781fe 3382 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3383 if (IS_ERR(cqr)) {
f932bcea
SW		 3384 mutex_lock(&dasd_reserve_mutex);
3385 useglobal = 1;
3386 cqr = &dasd_reserve_req->cqr;
3387 memset(cqr, 0, sizeof(*cqr));
3388 memset(&dasd_reserve_req->ccw, 0,
3389 sizeof(dasd_reserve_req->ccw));
3390 cqr->cpaddr = &dasd_reserve_req->ccw;
3391 cqr->data = &dasd_reserve_req->data;
3392 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3393 }
f3eb5384
SW		 3394 ccw = cqr->cpaddr;
3395 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
3396 ccw->flags |= CCW_FLAG_SLI;
3397 ccw->count = 32;
3398 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3399 cqr->startdev = device;
3400 cqr->memdev = device;
1da177e4 3401 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3402 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3403 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 3404 cqr->expires = 2 * HZ;
3405 cqr->buildclk = get_clock();
3406 cqr->status = DASD_CQR_FILLED;
3407
3408 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3409 if (!rc)
3410 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3411
f932bcea
SW		 3412 if (useglobal)
3413 mutex_unlock(&dasd_reserve_mutex);
3414 else
3415 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3416 return rc;
3417}
3418
3419/*
3420 * Reserve device ioctl.
3421 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 3422 * 'timeout the request'. This leads to a terminate IO if
3423 * the interrupt is outstanding for a certain time.
1da177e4
LT		 3424 */
3425static int
1107ccfb 3426dasd_eckd_reserve(struct dasd_device *device)
1da177e4 3427{
1da177e4
LT		 3428 struct dasd_ccw_req *cqr;
3429 int rc;
f3eb5384 3430 struct ccw1 *ccw;
f932bcea 3431 int useglobal;
1da177e4
LT		 3432
3433 if (!capable(CAP_SYS_ADMIN))
3434 return -EACCES;
3435
f932bcea 3436 useglobal = 0;
68b781fe 3437 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3438 if (IS_ERR(cqr)) {
f932bcea
SW		 3439 mutex_lock(&dasd_reserve_mutex);
3440 useglobal = 1;
3441 cqr = &dasd_reserve_req->cqr;
3442 memset(cqr, 0, sizeof(*cqr));
3443 memset(&dasd_reserve_req->ccw, 0,
3444 sizeof(dasd_reserve_req->ccw));
3445 cqr->cpaddr = &dasd_reserve_req->ccw;
3446 cqr->data = &dasd_reserve_req->data;
3447 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3448 }
f3eb5384
SW		 3449 ccw = cqr->cpaddr;
3450 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
3451 ccw->flags |= CCW_FLAG_SLI;
3452 ccw->count = 32;
3453 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3454 cqr->startdev = device;
3455 cqr->memdev = device;
1da177e4 3456 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3457 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3458 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 3459 cqr->expires = 2 * HZ;
3460 cqr->buildclk = get_clock();
3461 cqr->status = DASD_CQR_FILLED;
3462
3463 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3464 if (!rc)
3465 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3466
f932bcea
SW		 3467 if (useglobal)
3468 mutex_unlock(&dasd_reserve_mutex);
3469 else
3470 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3471 return rc;
3472}
3473
3474/*
3475 * Steal lock ioctl - unconditional reserve device.
138c014d 3476 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 3477 * (unconditional reserve)
3478 */
3479static int
1107ccfb 3480dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 3481{
1da177e4
LT		 3482 struct dasd_ccw_req *cqr;
3483 int rc;
f3eb5384 3484 struct ccw1 *ccw;
f932bcea 3485 int useglobal;
1da177e4
LT		 3486
3487 if (!capable(CAP_SYS_ADMIN))
3488 return -EACCES;
3489
f932bcea 3490 useglobal = 0;
68b781fe 3491 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 3492 if (IS_ERR(cqr)) {
f932bcea
SW		 3493 mutex_lock(&dasd_reserve_mutex);
3494 useglobal = 1;
3495 cqr = &dasd_reserve_req->cqr;
3496 memset(cqr, 0, sizeof(*cqr));
3497 memset(&dasd_reserve_req->ccw, 0,
3498 sizeof(dasd_reserve_req->ccw));
3499 cqr->cpaddr = &dasd_reserve_req->ccw;
3500 cqr->data = &dasd_reserve_req->data;
3501 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 3502 }
f3eb5384
SW		 3503 ccw = cqr->cpaddr;
3504 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
3505 ccw->flags |= CCW_FLAG_SLI;
3506 ccw->count = 32;
3507 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 3508 cqr->startdev = device;
3509 cqr->memdev = device;
1da177e4 3510 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 3511 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 3512 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 3513 cqr->expires = 2 * HZ;
3514 cqr->buildclk = get_clock();
3515 cqr->status = DASD_CQR_FILLED;
3516
3517 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 3518 if (!rc)
3519 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 3520
f932bcea
SW		 3521 if (useglobal)
3522 mutex_unlock(&dasd_reserve_mutex);
3523 else
3524 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3525 return rc;
3526}
3527
196339f1
SW		 3528/*
3529 * SNID - Sense Path Group ID
3530 * This ioctl may be used in situations where I/O is stalled due to
3531 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3532 * preallocated dasd_reserve_req.
3533 */
3534static int dasd_eckd_snid(struct dasd_device *device,
3535 void __user *argp)
3536{
3537 struct dasd_ccw_req *cqr;
3538 int rc;
3539 struct ccw1 *ccw;
3540 int useglobal;
3541 struct dasd_snid_ioctl_data usrparm;
3542
3543 if (!capable(CAP_SYS_ADMIN))
3544 return -EACCES;
3545
3546 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3547 return -EFAULT;
3548
3549 useglobal = 0;
3550 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
3551 sizeof(struct dasd_snid_data), device);
3552 if (IS_ERR(cqr)) {
3553 mutex_lock(&dasd_reserve_mutex);
3554 useglobal = 1;
3555 cqr = &dasd_reserve_req->cqr;
3556 memset(cqr, 0, sizeof(*cqr));
3557 memset(&dasd_reserve_req->ccw, 0,
3558 sizeof(dasd_reserve_req->ccw));
3559 cqr->cpaddr = &dasd_reserve_req->ccw;
3560 cqr->data = &dasd_reserve_req->data;
3561 cqr->magic = DASD_ECKD_MAGIC;
3562 }
3563 ccw = cqr->cpaddr;
3564 ccw->cmd_code = DASD_ECKD_CCW_SNID;
3565 ccw->flags |= CCW_FLAG_SLI;
3566 ccw->count = 12;
3567 ccw->cda = (__u32)(addr_t) cqr->data;
3568 cqr->startdev = device;
3569 cqr->memdev = device;
3570 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3571 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 3572 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 3573 cqr->retries = 5;
3574 cqr->expires = 10 * HZ;
3575 cqr->buildclk = get_clock();
3576 cqr->status = DASD_CQR_FILLED;
3577 cqr->lpm = usrparm.path_mask;
3578
3579 rc = dasd_sleep_on_immediatly(cqr);
3580 /* verify that I/O processing didn't modify the path mask */
3581 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
3582 rc = -EIO;
3583 if (!rc) {
3584 usrparm.data = *((struct dasd_snid_data *)cqr->data);
3585 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
3586 rc = -EFAULT;
3587 }
3588
3589 if (useglobal)
3590 mutex_unlock(&dasd_reserve_mutex);
3591 else
3592 dasd_sfree_request(cqr, cqr->memdev);
3593 return rc;
3594}
3595
1da177e4
LT		 3596/*
3597 * Read performance statistics
3598 */
3599static int
1107ccfb 3600dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 3601{
1da177e4
LT		 3602 struct dasd_psf_prssd_data *prssdp;
3603 struct dasd_rssd_perf_stats_t *stats;
3604 struct dasd_ccw_req *cqr;
3605 struct ccw1 *ccw;
3606 int rc;
3607
68b781fe 3608 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 3609 (sizeof(struct dasd_psf_prssd_data) +
3610 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 3611 device);
3612 if (IS_ERR(cqr)) {
fc19f381 3613 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 3614 "Could not allocate initialization request");
3615 return PTR_ERR(cqr);
3616 }
8e09f215
SW		 3617 cqr->startdev = device;
3618 cqr->memdev = device;
1da177e4 3619 cqr->retries = 0;
eb6e199b 3620 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 3621 cqr->expires = 10 * HZ;
3622
3623 /* Prepare for Read Subsystem Data */
3624 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 3625 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 3626 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 3627 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 3628 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
3629
3630 ccw = cqr->cpaddr;
3631 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 3632 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 3633 ccw->flags |= CCW_FLAG_CC;
3634 ccw->cda = (__u32)(addr_t) prssdp;
3635
3636 /* Read Subsystem Data - Performance Statistics */
3637 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 3638 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 3639
3640 ccw++;
3641 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 3642 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 3643 ccw->cda = (__u32)(addr_t) stats;
3644
3645 cqr->buildclk = get_clock();
3646 cqr->status = DASD_CQR_FILLED;
3647 rc = dasd_sleep_on(cqr);
3648 if (rc == 0) {
1da177e4
LT		 3649 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3650 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 3651 if (copy_to_user(argp, stats,
3652 sizeof(struct dasd_rssd_perf_stats_t)))
3653 rc = -EFAULT;
1da177e4 3654 }
8e09f215 3655 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3656 return rc;
3657}
3658
3659/*
3660 * Get attributes (cache operations)
3661 * Returnes the cache attributes used in Define Extend (DE).
3662 */
3663static int
1107ccfb 3664dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3665{
1107ccfb
CH		 3666 struct dasd_eckd_private *private =
3667 (struct dasd_eckd_private *)device->private;
3668 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 3669 int rc;
3670
3671 if (!capable(CAP_SYS_ADMIN))
3672 return -EACCES;
1107ccfb 3673 if (!argp)
1da177e4
LT		 3674 return -EINVAL;
3675
1107ccfb
CH		 3676 rc = 0;
3677 if (copy_to_user(argp, (long *) &attrib,
8e09f215 3678 sizeof(struct attrib_data_t)))
1107ccfb 3679 rc = -EFAULT;
1da177e4
LT		 3680
3681 return rc;
3682}
3683
3684/*
3685 * Set attributes (cache operations)
3686 * Stores the attributes for cache operation to be used in Define Extend (DE).
3687 */
3688static int
1107ccfb 3689dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 3690{
1107ccfb
CH		 3691 struct dasd_eckd_private *private =
3692 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 3693 struct attrib_data_t attrib;
3694
3695 if (!capable(CAP_SYS_ADMIN))
3696 return -EACCES;
1107ccfb 3697 if (!argp)
1da177e4
LT		 3698 return -EINVAL;
3699
1107ccfb 3700 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 3701 return -EFAULT;
1da177e4
LT		 3702 private->attrib = attrib;
3703
fc19f381
SH		 3704 dev_info(&device->cdev->dev,
3705 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3706 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 3707 return 0;
3708}
3709
ab1d848f
NH		 3710/*
3711 * Issue syscall I/O to EMC Symmetrix array.
3712 * CCWs are PSF and RSSD
3713 */
3714static int dasd_symm_io(struct dasd_device *device, void __user *argp)
3715{
3716 struct dasd_symmio_parms usrparm;
3717 char *psf_data, *rssd_result;
3718 struct dasd_ccw_req *cqr;
3719 struct ccw1 *ccw;
52898025 3720 char psf0, psf1;
ab1d848f
NH		 3721 int rc;
3722
52898025
NH		 3723 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
3724 return -EACCES;
3725 psf0 = psf1 = 0;
3726
ab1d848f
NH		 3727 /* Copy parms from caller */
3728 rc = -EFAULT;
3729 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3730 goto out;
f8b06859
HC		 3731 if (is_compat_task() || sizeof(long) == 4) {
3732 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 3733 rc = -EINVAL;
f8b06859
HC		 3734 if ((usrparm.psf_data >> 32) != 0)
3735 goto out;
3736 if ((usrparm.rssd_result >> 32) != 0)
3737 goto out;
3738 usrparm.psf_data &= 0x7fffffffULL;
3739 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 3740 }
ab1d848f
NH		 3741 /* alloc I/O data area */
3742 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
3743 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
3744 if (!psf_data || !rssd_result) {
3745 rc = -ENOMEM;
3746 goto out_free;
3747 }
3748
3749 /* get syscall header from user space */
3750 rc = -EFAULT;
3751 if (copy_from_user(psf_data,
3752 (void __user *)(unsigned long) usrparm.psf_data,
3753 usrparm.psf_data_len))
3754 goto out_free;
52898025
NH		 3755 psf0 = psf_data[0];
3756 psf1 = psf_data[1];
ab1d848f
NH		 3757
3758 /* setup CCWs for PSF + RSSD */
68b781fe 3759 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 3760 if (IS_ERR(cqr)) {
fc19f381 3761 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 3762 "Could not allocate initialization request");
3763 rc = PTR_ERR(cqr);
3764 goto out_free;
3765 }
3766
3767 cqr->startdev = device;
3768 cqr->memdev = device;
3769 cqr->retries = 3;
3770 cqr->expires = 10 * HZ;
3771 cqr->buildclk = get_clock();
3772 cqr->status = DASD_CQR_FILLED;
3773
3774 /* Build the ccws */
3775 ccw = cqr->cpaddr;
3776
3777 /* PSF ccw */
3778 ccw->cmd_code = DASD_ECKD_CCW_PSF;
3779 ccw->count = usrparm.psf_data_len;
3780 ccw->flags |= CCW_FLAG_CC;
3781 ccw->cda = (__u32)(addr_t) psf_data;
3782
3783 ccw++;
3784
3785 /* RSSD ccw */
3786 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
3787 ccw->count = usrparm.rssd_result_len;
3788 ccw->flags = CCW_FLAG_SLI ;
3789 ccw->cda = (__u32)(addr_t) rssd_result;
3790
3791 rc = dasd_sleep_on(cqr);
3792 if (rc)
3793 goto out_sfree;
3794
3795 rc = -EFAULT;
3796 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
3797 rssd_result, usrparm.rssd_result_len))
3798 goto out_sfree;
3799 rc = 0;
3800
3801out_sfree:
3802 dasd_sfree_request(cqr, cqr->memdev);
3803out_free:
3804 kfree(rssd_result);
3805 kfree(psf_data);
3806out:
52898025
NH		 3807 DBF_DEV_EVENT(DBF_WARNING, device,
3808 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
3809 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 3810 return rc;
3811}
3812
1107ccfb 3813static int
8e09f215 3814dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 3815{
8e09f215
SW		 3816 struct dasd_device *device = block->base;
3817
1107ccfb
CH		 3818 switch (cmd) {
3819 case BIODASDGATTR:
3820 return dasd_eckd_get_attrib(device, argp);
3821 case BIODASDSATTR:
3822 return dasd_eckd_set_attrib(device, argp);
3823 case BIODASDPSRD:
3824 return dasd_eckd_performance(device, argp);
3825 case BIODASDRLSE:
3826 return dasd_eckd_release(device);
3827 case BIODASDRSRV:
3828 return dasd_eckd_reserve(device);
3829 case BIODASDSLCK:
3830 return dasd_eckd_steal_lock(device);
196339f1
SW		 3831 case BIODASDSNID:
3832 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 3833 case BIODASDSYMMIO:
3834 return dasd_symm_io(device, argp);
1107ccfb 3835 default:
6b79d14e 3836 return -ENOTTY;
1107ccfb
CH		 3837 }
3838}
3839
445b5b49
HH		 3840/*
3841 * Dump the range of CCWs into 'page' buffer
3842 * and return number of printed chars.
3843 */
4d284cac 3844static int
445b5b49
HH		 3845dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
3846{
3847 int len, count;
3848 char *datap;
3849
3850 len = 0;
3851 while (from <= to) {
773bab4a 3852 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 3853 " CCW %p: %08X %08X DAT:",
3854 from, ((int *) from)[0], ((int *) from)[1]);
3855
3856 /* get pointer to data (consider IDALs) */
3857 if (from->flags & CCW_FLAG_IDA)
3858 datap = (char *) *((addr_t *) (addr_t) from->cda);
3859 else
3860 datap = (char *) ((addr_t) from->cda);
3861
3862 /* dump data (max 32 bytes) */
3863 for (count = 0; count < from->count && count < 32; count++) {
3864 if (count % 8 == 0) len += sprintf(page + len, " ");
3865 if (count % 4 == 0) len += sprintf(page + len, " ");
3866 len += sprintf(page + len, "%02x", datap[count]);
3867 }
3868 len += sprintf(page + len, "\n");
3869 from++;
3870 }
3871 return len;
3872}
3873
fc19f381 3874static void
aeec92ca
SH		 3875dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
3876 char *reason)
fc19f381
SH		 3877{
3878 u64 *sense;
a5a0061f 3879 u64 *stat;
aeec92ca
SH		 3880
3881 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 3882 stat = (u64 *) &irb->scsw;
fc19f381 3883 if (sense) {
a5a0061f
SW		 3884 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
3885 "%016llx %016llx %016llx %016llx",
3886 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 3887 sense[0], sense[1], sense[2], sense[3]);
fc19f381 3888 } else {
a5a0061f
SW		 3889 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
3890 reason, *stat, *((u32 *) (stat + 1)),
3891 "NO VALID SENSE");
fc19f381
SH		 3892 }
3893}
3894
1da177e4
LT		 3895/*
3896 * Print sense data and related channel program.
3897 * Parts are printed because printk buffer is only 1024 bytes.
3898 */
f3eb5384 3899static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 3900 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 3901{
3902 char *page;
445b5b49
HH		 3903 struct ccw1 *first, *last, *fail, *from, *to;
3904 int len, sl, sct;
1da177e4
LT		 3905
3906 page = (char *) get_zeroed_page(GFP_ATOMIC);
3907 if (page == NULL) {
fc19f381
SH		 3908 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3909 "No memory to dump sense data\n");
1da177e4
LT		 3910 return;
3911 }
445b5b49 3912 /* dump the sense data */
773bab4a 3913 len = sprintf(page, PRINTK_HEADER
1da177e4 3914 " I/O status report for device %s:\n",
2a0217d5 3915 dev_name(&device->cdev->dev));
773bab4a 3916 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 3917 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
3918 "CS:%02X RC:%d\n",
3919 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
3920 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
3921 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
3922 req ? req->intrc : 0);
773bab4a 3923 len += sprintf(page + len, PRINTK_HEADER
1da177e4 3924 " device %s: Failing CCW: %p\n",
2a0217d5 3925 dev_name(&device->cdev->dev),
23d805b6 3926 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 3927 if (irb->esw.esw0.erw.cons) {
3928 for (sl = 0; sl < 4; sl++) {
773bab4a 3929 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 3930 " Sense(hex) %2d-%2d:",
3931 (8 * sl), ((8 * sl) + 7));
3932
3933 for (sct = 0; sct < 8; sct++) {
3934 len += sprintf(page + len, " %02x",
3935 irb->ecw[8 * sl + sct]);
3936 }
3937 len += sprintf(page + len, "\n");
3938 }
3939
3940 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3941 /* 24 Byte Sense Data */
773bab4a 3942 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 3943 " 24 Byte: %x MSG %x, "
3944 "%s MSGb to SYSOP\n",
3945 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3946 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 3947 } else {
3948 /* 32 Byte Sense Data */
773bab4a 3949 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 3950 " 32 Byte: Format: %x "
3951 "Exception class %x\n",
3952 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 3953 }
3954 } else {
773bab4a 3955 sprintf(page + len, PRINTK_HEADER
445b5b49 3956 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 3957 }
773bab4a 3958 printk(KERN_ERR "%s", page);
445b5b49 3959
8e09f215
SW		 3960 if (req) {
3961 /* req == NULL for unsolicited interrupts */
3962 /* dump the Channel Program (max 140 Bytes per line) */
3963 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3964 first = req->cpaddr;
3965 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3966 to = min(first + 6, last);
773bab4a 3967 len = sprintf(page, PRINTK_HEADER
8e09f215
SW		 3968 " Related CP in req: %p\n", req);
3969 dasd_eckd_dump_ccw_range(first, to, page + len);
773bab4a 3970 printk(KERN_ERR "%s", page);
1da177e4 3971
8e09f215
SW		 3972 /* print failing CCW area (maximum 4) */
3973 /* scsw->cda is either valid or zero */
3974 len = 0;
3975 from = ++to;
23d805b6
PO		 3976 fail = (struct ccw1 *)(addr_t)
3977 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 3978 if (from < fail - 2) {
3979 from = fail - 2; /* there is a gap - print header */
773bab4a 3980 len += sprintf(page, PRINTK_HEADER "......\n");
8e09f215
SW		 3981 }
3982 to = min(fail + 1, last);
3983 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3984
3985 /* print last CCWs (maximum 2) */
3986 from = max(from, ++to);
3987 if (from < last - 1) {
3988 from = last - 1; /* there is a gap - print header */
773bab4a 3989 len += sprintf(page + len, PRINTK_HEADER "......\n");
8e09f215
SW		 3990 }
3991 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3992 if (len > 0)
773bab4a 3993 printk(KERN_ERR "%s", page);
1da177e4 3994 }
1da177e4
LT		 3995 free_page((unsigned long) page);
3996}
3997
f3eb5384
SW		 3998
3999/*
4000 * Print sense data from a tcw.
4001 */
4002static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4003 struct dasd_ccw_req *req, struct irb *irb)
4004{
4005 char *page;
4006 int len, sl, sct, residual;
f3eb5384 4007 struct tsb *tsb;
ef19298b 4008 u8 *sense, *rcq;
f3eb5384
SW		 4009
4010 page = (char *) get_zeroed_page(GFP_ATOMIC);
4011 if (page == NULL) {
fc19f381 4012 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 4013 "No memory to dump sense data");
4014 return;
4015 }
4016 /* dump the sense data */
773bab4a 4017 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 4018 " I/O status report for device %s:\n",
4019 dev_name(&device->cdev->dev));
773bab4a 4020 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4021 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4022 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4023 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4024 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4025 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4026 irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
4027 req ? req->intrc : 0);
773bab4a 4028 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4029 " device %s: Failing TCW: %p\n",
4030 dev_name(&device->cdev->dev),
4031 (void *) (addr_t) irb->scsw.tm.tcw);
4032
4033 tsb = NULL;
4034 sense = NULL;
a5a0061f 4035 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 4036 tsb = tcw_get_tsb(
4037 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4038
b8fde722 4039 if (tsb) {
773bab4a 4040 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4041 " tsb->length %d\n", tsb->length);
773bab4a 4042 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4043 " tsb->flags %x\n", tsb->flags);
773bab4a 4044 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4045 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 4046 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4047 " tsb->count %d\n", tsb->count);
4048 residual = tsb->count - 28;
773bab4a 4049 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4050 " residual %d\n", residual);
4051
4052 switch (tsb->flags & 0x07) {
4053 case 1: /* tsa_iostat */
773bab4a 4054 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4055 " tsb->tsa.iostat.dev_time %d\n",
4056 tsb->tsa.iostat.dev_time);
773bab4a 4057 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4058 " tsb->tsa.iostat.def_time %d\n",
4059 tsb->tsa.iostat.def_time);
773bab4a 4060 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4061 " tsb->tsa.iostat.queue_time %d\n",
4062 tsb->tsa.iostat.queue_time);
773bab4a 4063 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4064 " tsb->tsa.iostat.dev_busy_time %d\n",
4065 tsb->tsa.iostat.dev_busy_time);
773bab4a 4066 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4067 " tsb->tsa.iostat.dev_act_time %d\n",
4068 tsb->tsa.iostat.dev_act_time);
4069 sense = tsb->tsa.iostat.sense;
4070 break;
4071 case 2: /* ts_ddpc */
773bab4a 4072 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4073 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 4074 for (sl = 0; sl < 2; sl++) {
773bab4a 4075 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 4076 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4077 (8 * sl), ((8 * sl) + 7));
4078 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 4079 for (sct = 0; sct < 8; sct++) {
4080 len += sprintf(page + len, " %02x",
ef19298b 4081 rcq[8 * sl + sct]);
f3eb5384
SW		 4082 }
4083 len += sprintf(page + len, "\n");
4084 }
4085 sense = tsb->tsa.ddpc.sense;
4086 break;
4087 case 3: /* tsa_intrg */
773bab4a
SO		 4088 len += sprintf(page + len, PRINTK_HEADER
4089 " tsb->tsa.intrg.: not supportet yet\n");
f3eb5384
SW		 4090 break;
4091 }
4092
4093 if (sense) {
4094 for (sl = 0; sl < 4; sl++) {
773bab4a 4095 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4096 " Sense(hex) %2d-%2d:",
4097 (8 * sl), ((8 * sl) + 7));
4098 for (sct = 0; sct < 8; sct++) {
4099 len += sprintf(page + len, " %02x",
4100 sense[8 * sl + sct]);
4101 }
4102 len += sprintf(page + len, "\n");
4103 }
4104
4105 if (sense[27] & DASD_SENSE_BIT_0) {
4106 /* 24 Byte Sense Data */
773bab4a 4107 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4108 " 24 Byte: %x MSG %x, "
4109 "%s MSGb to SYSOP\n",
4110 sense[7] >> 4, sense[7] & 0x0f,
4111 sense[1] & 0x10 ? "" : "no");
4112 } else {
4113 /* 32 Byte Sense Data */
773bab4a 4114 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4115 " 32 Byte: Format: %x "
4116 "Exception class %x\n",
4117 sense[6] & 0x0f, sense[22] >> 4);
4118 }
4119 } else {
773bab4a 4120 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4121 " SORRY - NO VALID SENSE AVAILABLE\n");
4122 }
4123 } else {
773bab4a 4124 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4125 " SORRY - NO TSB DATA AVAILABLE\n");
4126 }
773bab4a 4127 printk(KERN_ERR "%s", page);
f3eb5384
SW		 4128 free_page((unsigned long) page);
4129}
4130
4131static void dasd_eckd_dump_sense(struct dasd_device *device,
4132 struct dasd_ccw_req *req, struct irb *irb)
4133{
a5a0061f 4134 if (scsw_is_tm(&irb->scsw))
f3eb5384
SW		 4135 dasd_eckd_dump_sense_tcw(device, req, irb);
4136 else
4137 dasd_eckd_dump_sense_ccw(device, req, irb);
4138}
4139
501183f2 4140static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 4141{
4142 /*
4143 * the device should be disconnected from our LCU structure
4144 * on restore we will reconnect it and reread LCU specific
4145 * information like PAV support that might have changed
4146 */
4147 dasd_alias_remove_device(device);
4148 dasd_alias_disconnect_device_from_lcu(device);
4149
4150 return 0;
4151}
4152
501183f2 4153static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122
SH		 4154{
4155 struct dasd_eckd_private *private;
6fca97a9 4156 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 4157 int rc;
d41dd122 4158 struct dasd_uid temp_uid;
a7602f6c 4159 unsigned long flags;
d41dd122 4160
d41dd122
SH		 4161 private = (struct dasd_eckd_private *) device->private;
4162
4163 /* Read Configuration Data */
55d3a85c 4164 dasd_eckd_read_conf(device);
d41dd122 4165
2dedf0d9
SH		 4166 dasd_eckd_get_uid(device, &temp_uid);
4167 /* Generate device unique id */
4168 rc = dasd_eckd_generate_uid(device);
4169 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 4170 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 4171 dev_err(&device->cdev->dev, "The UID of the DASD has "
4172 "changed\n");
2dedf0d9 4173 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4174 if (rc)
4175 goto out_err;
d41dd122
SH		 4176
4177 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 4178 rc = dasd_alias_make_device_known_to_lcu(device);
4179 if (rc)
4180 return rc;
12d7b107 4181 dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST);
f4ac1d02
SW		 4182
4183 /* RE-Read Configuration Data */
55d3a85c 4184 dasd_eckd_read_conf(device);
d41dd122
SH		 4185
4186 /* Read Feature Codes */
68d1e5f0 4187 dasd_eckd_read_features(device);
d41dd122
SH		 4188
4189 /* Read Device Characteristics */
68b781fe 4190 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 4191 &temp_rdc_data, 64);
d41dd122 4192 if (rc) {
b8ed5dd5
SH		 4193 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4194 "Read device characteristic failed, rc=%d", rc);
d41dd122
SH		 4195 goto out_err;
4196 }
a7602f6c 4197 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 4198 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 4199 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4200
4201 /* add device to alias management */
4202 dasd_alias_add_device(device);
4203
4204 return 0;
4205
4206out_err:
e6125fba 4207 return -1;
d41dd122
SH		 4208}
4209
501183f2
SH		 4210static int dasd_eckd_reload_device(struct dasd_device *device)
4211{
4212 struct dasd_eckd_private *private;
4213 int rc, old_base;
2dedf0d9
SH		 4214 char print_uid[60];
4215 struct dasd_uid uid;
4216 unsigned long flags;
501183f2
SH		 4217
4218 private = (struct dasd_eckd_private *) device->private;
2dedf0d9
SH		 4219
4220 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 4221 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 4222 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4223
501183f2
SH		 4224 /* Read Configuration Data */
4225 rc = dasd_eckd_read_conf(device);
4226 if (rc)
4227 goto out_err;
4228
2dedf0d9 4229 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 4230 if (rc)
4231 goto out_err;
501183f2
SH		 4232 /*
4233 * update unit address configuration and
4234 * add device to alias management
4235 */
4236 dasd_alias_update_add_device(device);
4237
2dedf0d9
SH		 4238 dasd_eckd_get_uid(device, &uid);
4239
4240 if (old_base != uid.base_unit_addr) {
4241 if (strlen(uid.vduit) > 0)
4242 snprintf(print_uid, sizeof(print_uid),
4243 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
4244 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 4245 else
2dedf0d9
SH		 4246 snprintf(print_uid, sizeof(print_uid),
4247 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
4248 uid.ssid, uid.base_unit_addr);
501183f2
SH		 4249
4250 dev_info(&device->cdev->dev,
4251 "An Alias device was reassigned to a new base device "
2dedf0d9 4252 "with UID: %s\n", print_uid);
501183f2
SH		 4253 }
4254 return 0;
4255
4256out_err:
4257 return -1;
4258}
4259
d41dd122 4260static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 4261 .driver = {
4262 .name = "dasd-eckd",
4263 .owner = THIS_MODULE,
4264 },
d41dd122
SH		 4265 .ids = dasd_eckd_ids,
4266 .probe = dasd_eckd_probe,
4267 .remove = dasd_generic_remove,
4268 .set_offline = dasd_generic_set_offline,
4269 .set_online = dasd_eckd_set_online,
4270 .notify = dasd_generic_notify,
a4d26c6a 4271 .path_event = dasd_generic_path_event,
4679e893 4272 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 4273 .freeze = dasd_generic_pm_freeze,
4274 .thaw = dasd_generic_restore_device,
4275 .restore = dasd_generic_restore_device,
a23ed009 4276 .uc_handler = dasd_generic_uc_handler,
420f42ec 4277 .int_class = IRQIO_DAS,
d41dd122 4278};
f3eb5384 4279
1da177e4
LT		 4280/*
4281 * max_blocks is dependent on the amount of storage that is available
4282 * in the static io buffer for each device. Currently each device has
4283 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
4284 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
4285 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
4286 * addition we have one define extent ccw + 16 bytes of data and one
4287 * locate record ccw + 16 bytes of data. That makes:
4288 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
4289 * We want to fit two into the available memory so that we can immediately
4290 * start the next request if one finishes off. That makes 249.5 blocks
4291 * for one request. Give a little safety and the result is 240.
4292 */
4293static struct dasd_discipline dasd_eckd_discipline = {
4294 .owner = THIS_MODULE,
4295 .name = "ECKD",
4296 .ebcname = "ECKD",
ef19298b 4297 .max_blocks = 190,
1da177e4 4298 .check_device = dasd_eckd_check_characteristics,
8e09f215 4299 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 4300 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 4301 .verify_path = dasd_eckd_verify_path,
8e09f215
SW		 4302 .ready_to_online = dasd_eckd_ready_to_online,
4303 .online_to_ready = dasd_eckd_online_to_ready,
1da177e4
LT		 4304 .fill_geometry = dasd_eckd_fill_geometry,
4305 .start_IO = dasd_start_IO,
4306 .term_IO = dasd_term_IO,
8e09f215 4307 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 4308 .format_device = dasd_eckd_format_device,
1da177e4
LT		 4309 .erp_action = dasd_eckd_erp_action,
4310 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 4311 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 4312 .build_cp = dasd_eckd_build_alias_cp,
4313 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 4314 .dump_sense = dasd_eckd_dump_sense,
fc19f381 4315 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 4316 .fill_info = dasd_eckd_fill_info,
1107ccfb 4317 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 4318 .freeze = dasd_eckd_pm_freeze,
4319 .restore = dasd_eckd_restore_device,
501183f2 4320 .reload = dasd_eckd_reload_device,
2dedf0d9 4321 .get_uid = dasd_eckd_get_uid,
f1633031 4322 .kick_validate = dasd_eckd_kick_validate_server,
1da177e4
LT		 4323};
4324
4325static int __init
4326dasd_eckd_init(void)
4327{
736e6ea0
SO		 4328 int ret;
4329
1da177e4 4330 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 4331 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
4332 GFP_KERNEL | GFP_DMA);
4333 if (!dasd_reserve_req)
4334 return -ENOMEM;
a4d26c6a
SW		 4335 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
4336 GFP_KERNEL | GFP_DMA);
4337 if (!path_verification_worker) {
4338 kfree(dasd_reserve_req);
4339 return -ENOMEM;
4340 }
736e6ea0
SO		 4341 ret = ccw_driver_register(&dasd_eckd_driver);
4342 if (!ret)
4343 wait_for_device_probe();
a4d26c6a
SW		 4344 else {
4345 kfree(path_verification_worker);
f932bcea 4346 kfree(dasd_reserve_req);
a4d26c6a 4347 }
736e6ea0 4348 return ret;
1da177e4
LT		 4349}
4350
4351static void __exit
4352dasd_eckd_cleanup(void)
4353{
4354 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 4355 kfree(path_verification_worker);
f932bcea 4356 kfree(dasd_reserve_req);
1da177e4
LT		 4357}
4358
4359module_init(dasd_eckd_init);
4360module_exit(dasd_eckd_cleanup);
kernel source for telekom puls (alcatel/mediatek)