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[S390] dasd: add dynamic pav toleration
[linux-2.6-block.git] / drivers / s390 / block / dasd_eckd.c
CommitLineData
138c014d 1/*
1da177e4
LT		 2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d 4 * Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
d41dd122 8 * Copyright IBM Corp. 1999, 2009
ab1d848f
NH		 9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
1da177e4
LT		 11 */
12
ca99dab0 13#define KMSG_COMPONENT "dasd-eckd"
fc19f381 14
1da177e4
LT		 15#include <linux/stddef.h>
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/hdreg.h> /* HDIO_GETGEO */
19#include <linux/bio.h>
20#include <linux/module.h>
21#include <linux/init.h>
22
23#include <asm/debug.h>
24#include <asm/idals.h>
25#include <asm/ebcdic.h>
f8b06859 26#include <asm/compat.h>
1da177e4 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"
f3eb5384
SW		 35#include "../cio/chsc.h"
36
1da177e4
LT		 37
38#ifdef PRINTK_HEADER
39#undef PRINTK_HEADER
40#endif /* PRINTK_HEADER */
41#define PRINTK_HEADER "dasd(eckd):"
42
43#define ECKD_C0(i) (i->home_bytes)
44#define ECKD_F(i) (i->formula)
45#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
46 (i->factors.f_0x02.f1))
47#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
48 (i->factors.f_0x02.f2))
49#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
50 (i->factors.f_0x02.f3))
51#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
52#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
53#define ECKD_F6(i) (i->factor6)
54#define ECKD_F7(i) (i->factor7)
55#define ECKD_F8(i) (i->factor8)
56
57MODULE_LICENSE("GPL");
58
59static struct dasd_discipline dasd_eckd_discipline;
60
1da177e4
LT		 61/* The ccw bus type uses this table to find devices that it sends to
62 * dasd_eckd_probe */
63static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 64 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
65 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
66 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
67 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
68 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
69 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
70 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
71 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
72 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
73 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 74 { /* end of list */ },
75};
76
77MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
78
79static struct ccw_driver dasd_eckd_driver; /* see below */
80
eb6e199b
SW		 81#define INIT_CQR_OK 0
82#define INIT_CQR_UNFORMATTED 1
83#define INIT_CQR_ERROR 2
84
85
1da177e4
LT		 86/* initial attempt at a probe function. this can be simplified once
87 * the other detection code is gone */
88static int
89dasd_eckd_probe (struct ccw_device *cdev)
90{
91 int ret;
92
40545573 93 /* set ECKD specific ccw-device options */
454e1fa1
PO		 94 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
95 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 96 if (ret) {
b8ed5dd5
SH		 97 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
98 "dasd_eckd_probe: could not set "
99 "ccw-device options");
1da177e4 100 return ret;
40545573
HH		 101 }
102 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
103 return ret;
1da177e4
LT		 104}
105
106static int
107dasd_eckd_set_online(struct ccw_device *cdev)
108{
40545573 109 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 110}
111
1da177e4
LT		 112static const int sizes_trk0[] = { 28, 148, 84 };
113#define LABEL_SIZE 140
114
115static inline unsigned int
116round_up_multiple(unsigned int no, unsigned int mult)
117{
118 int rem = no % mult;
119 return (rem ? no - rem + mult : no);
120}
121
122static inline unsigned int
123ceil_quot(unsigned int d1, unsigned int d2)
124{
125 return (d1 + (d2 - 1)) / d2;
126}
127
4d284cac 128static unsigned int
1da177e4
LT		 129recs_per_track(struct dasd_eckd_characteristics * rdc,
130 unsigned int kl, unsigned int dl)
131{
132 int dn, kn;
133
134 switch (rdc->dev_type) {
135 case 0x3380:
136 if (kl)
137 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
138 ceil_quot(dl + 12, 32));
139 else
140 return 1499 / (15 + ceil_quot(dl + 12, 32));
141 case 0x3390:
142 dn = ceil_quot(dl + 6, 232) + 1;
143 if (kl) {
144 kn = ceil_quot(kl + 6, 232) + 1;
145 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
146 9 + ceil_quot(dl + 6 * dn, 34));
147 } else
148 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
149 case 0x9345:
150 dn = ceil_quot(dl + 6, 232) + 1;
151 if (kl) {
152 kn = ceil_quot(kl + 6, 232) + 1;
153 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
154 ceil_quot(dl + 6 * dn, 34));
155 } else
156 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
157 }
158 return 0;
159}
160
b44b0ab3
SW		 161static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
162{
163 geo->cyl = (__u16) cyl;
164 geo->head = cyl >> 16;
165 geo->head <<= 4;
166 geo->head |= head;
167}
168
4d284cac 169static int
1da177e4
LT		 170check_XRC (struct ccw1 *de_ccw,
171 struct DE_eckd_data *data,
172 struct dasd_device *device)
173{
174 struct dasd_eckd_private *private;
d54853ef 175 int rc;
1da177e4
LT		 176
177 private = (struct dasd_eckd_private *) device->private;
d54853ef
MS		 178 if (!private->rdc_data.facilities.XRC_supported)
179 return 0;
1da177e4
LT		 180
181 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 182 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
183 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 184
d54853ef
MS		 185 rc = get_sync_clock(&data->ep_sys_time);
186 /* Ignore return code if sync clock is switched off. */
187 if (rc == -ENOSYS || rc == -EACCES)
188 rc = 0;
1da177e4 189
8e09f215 190 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 191 de_ccw->flags |= CCW_FLAG_SLI;
192 return rc;
193}
1da177e4 194
4d284cac 195static int
b44b0ab3
SW		 196define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
197 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4
LT		 198{
199 struct dasd_eckd_private *private;
b44b0ab3
SW		 200 u32 begcyl, endcyl;
201 u16 heads, beghead, endhead;
d54853ef 202 int rc = 0;
1da177e4
LT		 203
204 private = (struct dasd_eckd_private *) device->private;
205
206 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
207 ccw->flags = 0;
208 ccw->count = 16;
209 ccw->cda = (__u32) __pa(data);
210
8e09f215 211 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 212 switch (cmd) {
213 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
214 case DASD_ECKD_CCW_READ_RECORD_ZERO:
215 case DASD_ECKD_CCW_READ:
216 case DASD_ECKD_CCW_READ_MT:
217 case DASD_ECKD_CCW_READ_CKD:
218 case DASD_ECKD_CCW_READ_CKD_MT:
219 case DASD_ECKD_CCW_READ_KD:
220 case DASD_ECKD_CCW_READ_KD_MT:
221 case DASD_ECKD_CCW_READ_COUNT:
222 data->mask.perm = 0x1;
223 data->attributes.operation = private->attrib.operation;
224 break;
225 case DASD_ECKD_CCW_WRITE:
226 case DASD_ECKD_CCW_WRITE_MT:
227 case DASD_ECKD_CCW_WRITE_KD:
228 case DASD_ECKD_CCW_WRITE_KD_MT:
229 data->mask.perm = 0x02;
230 data->attributes.operation = private->attrib.operation;
d54853ef 231 rc = check_XRC (ccw, data, device);
1da177e4
LT		 232 break;
233 case DASD_ECKD_CCW_WRITE_CKD:
234 case DASD_ECKD_CCW_WRITE_CKD_MT:
235 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 236 rc = check_XRC (ccw, data, device);
1da177e4
LT		 237 break;
238 case DASD_ECKD_CCW_ERASE:
239 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
240 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
241 data->mask.perm = 0x3;
242 data->mask.auth = 0x1;
243 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 244 rc = check_XRC (ccw, data, device);
1da177e4
LT		 245 break;
246 default:
fc19f381
SH		 247 dev_err(&device->cdev->dev,
248 "0x%x is not a known command\n", cmd);
1da177e4
LT		 249 break;
250 }
251
252 data->attributes.mode = 0x3; /* ECKD */
253
254 if ((private->rdc_data.cu_type == 0x2105 ||
255 private->rdc_data.cu_type == 0x2107 ||
256 private->rdc_data.cu_type == 0x1750)
257 && !(private->uses_cdl && trk < 2))
258 data->ga_extended |= 0x40; /* Regular Data Format Mode */
259
b44b0ab3
SW		 260 heads = private->rdc_data.trk_per_cyl;
261 begcyl = trk / heads;
262 beghead = trk % heads;
263 endcyl = totrk / heads;
264 endhead = totrk % heads;
1da177e4
LT		 265
266 /* check for sequential prestage - enhance cylinder range */
267 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
268 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 269
b44b0ab3
SW		 270 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
271 endcyl += private->attrib.nr_cyl;
1da177e4 272 else
b44b0ab3 273 endcyl = (private->real_cyl - 1);
1da177e4
LT		 274 }
275
b44b0ab3
SW		 276 set_ch_t(&data->beg_ext, begcyl, beghead);
277 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 278 return rc;
1da177e4
LT		 279}
280
8e09f215
SW		 281static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
282 struct dasd_device *device)
283{
284 struct dasd_eckd_private *private;
285 int rc;
286
287 private = (struct dasd_eckd_private *) device->private;
288 if (!private->rdc_data.facilities.XRC_supported)
289 return 0;
290
291 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 292 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
293 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 294 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
295
f3eb5384 296 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215
SW		 297 /* Ignore return code if sync clock is switched off. */
298 if (rc == -ENOSYS || rc == -EACCES)
299 rc = 0;
300 return rc;
301}
302
f3eb5384
SW		 303static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
304 unsigned int rec_on_trk, int count, int cmd,
305 struct dasd_device *device, unsigned int reclen,
306 unsigned int tlf)
307{
308 struct dasd_eckd_private *private;
309 int sector;
310 int dn, d;
311
312 private = (struct dasd_eckd_private *) device->private;
313
314 memset(data, 0, sizeof(*data));
315 sector = 0;
316 if (rec_on_trk) {
317 switch (private->rdc_data.dev_type) {
318 case 0x3390:
319 dn = ceil_quot(reclen + 6, 232);
320 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
321 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
322 break;
323 case 0x3380:
324 d = 7 + ceil_quot(reclen + 12, 32);
325 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
326 break;
327 }
328 }
329 data->sector = sector;
330 /* note: meaning of count depends on the operation
331 * for record based I/O it's the number of records, but for
332 * track based I/O it's the number of tracks
333 */
334 data->count = count;
335 switch (cmd) {
336 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
337 data->operation.orientation = 0x3;
338 data->operation.operation = 0x03;
339 break;
340 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
341 data->operation.orientation = 0x3;
342 data->operation.operation = 0x16;
343 break;
344 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
345 data->operation.orientation = 0x1;
346 data->operation.operation = 0x03;
347 data->count++;
348 break;
349 case DASD_ECKD_CCW_READ_RECORD_ZERO:
350 data->operation.orientation = 0x3;
351 data->operation.operation = 0x16;
352 data->count++;
353 break;
354 case DASD_ECKD_CCW_WRITE:
355 case DASD_ECKD_CCW_WRITE_MT:
356 case DASD_ECKD_CCW_WRITE_KD:
357 case DASD_ECKD_CCW_WRITE_KD_MT:
358 data->auxiliary.length_valid = 0x1;
359 data->length = reclen;
360 data->operation.operation = 0x01;
361 break;
362 case DASD_ECKD_CCW_WRITE_CKD:
363 case DASD_ECKD_CCW_WRITE_CKD_MT:
364 data->auxiliary.length_valid = 0x1;
365 data->length = reclen;
366 data->operation.operation = 0x03;
367 break;
368 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
369 data->auxiliary.length_valid = 0x1;
370 data->length = reclen; /* not tlf, as one might think */
371 data->operation.operation = 0x3F;
372 data->extended_operation = 0x23;
373 break;
374 case DASD_ECKD_CCW_READ:
375 case DASD_ECKD_CCW_READ_MT:
376 case DASD_ECKD_CCW_READ_KD:
377 case DASD_ECKD_CCW_READ_KD_MT:
378 data->auxiliary.length_valid = 0x1;
379 data->length = reclen;
380 data->operation.operation = 0x06;
381 break;
382 case DASD_ECKD_CCW_READ_CKD:
383 case DASD_ECKD_CCW_READ_CKD_MT:
384 data->auxiliary.length_valid = 0x1;
385 data->length = reclen;
386 data->operation.operation = 0x16;
387 break;
388 case DASD_ECKD_CCW_READ_COUNT:
389 data->operation.operation = 0x06;
390 break;
391 case DASD_ECKD_CCW_READ_TRACK_DATA:
392 data->auxiliary.length_valid = 0x1;
393 data->length = tlf;
394 data->operation.operation = 0x0C;
395 break;
396 case DASD_ECKD_CCW_ERASE:
397 data->length = reclen;
398 data->auxiliary.length_valid = 0x1;
399 data->operation.operation = 0x0b;
400 break;
401 default:
402 DBF_DEV_EVENT(DBF_ERR, device,
403 "fill LRE unknown opcode 0x%x", cmd);
404 BUG();
405 }
406 set_ch_t(&data->seek_addr,
407 trk / private->rdc_data.trk_per_cyl,
408 trk % private->rdc_data.trk_per_cyl);
409 data->search_arg.cyl = data->seek_addr.cyl;
410 data->search_arg.head = data->seek_addr.head;
411 data->search_arg.record = rec_on_trk;
412}
413
414static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
415 unsigned int trk, unsigned int totrk, int cmd,
416 struct dasd_device *basedev, struct dasd_device *startdev,
417 unsigned char format, unsigned int rec_on_trk, int count,
418 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 419{
420 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 421 struct DE_eckd_data *dedata;
422 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 423 u32 begcyl, endcyl;
424 u16 heads, beghead, endhead;
8e09f215
SW		 425 int rc = 0;
426
427 basepriv = (struct dasd_eckd_private *) basedev->private;
428 startpriv = (struct dasd_eckd_private *) startdev->private;
f3eb5384
SW		 429 dedata = &pfxdata->define_extent;
430 lredata = &pfxdata->locate_record;
8e09f215
SW		 431
432 ccw->cmd_code = DASD_ECKD_CCW_PFX;
433 ccw->flags = 0;
434 ccw->count = sizeof(*pfxdata);
435 ccw->cda = (__u32) __pa(pfxdata);
436
437 memset(pfxdata, 0, sizeof(*pfxdata));
438 /* prefix data */
f3eb5384
SW		 439 if (format > 1) {
440 DBF_DEV_EVENT(DBF_ERR, basedev,
441 "PFX LRE unknown format 0x%x", format);
442 BUG();
443 return -EINVAL;
444 }
445 pfxdata->format = format;
4abb08c2
SW		 446 pfxdata->base_address = basepriv->ned->unit_addr;
447 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 448 pfxdata->validity.define_extent = 1;
8e09f215
SW		 449
450 /* private uid is kept up to date, conf_data may be outdated */
451 if (startpriv->uid.type != UA_BASE_DEVICE) {
452 pfxdata->validity.verify_base = 1;
453 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
454 pfxdata->validity.hyper_pav = 1;
455 }
456
457 /* define extend data (mostly)*/
458 switch (cmd) {
459 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
460 case DASD_ECKD_CCW_READ_RECORD_ZERO:
461 case DASD_ECKD_CCW_READ:
462 case DASD_ECKD_CCW_READ_MT:
463 case DASD_ECKD_CCW_READ_CKD:
464 case DASD_ECKD_CCW_READ_CKD_MT:
465 case DASD_ECKD_CCW_READ_KD:
466 case DASD_ECKD_CCW_READ_KD_MT:
467 case DASD_ECKD_CCW_READ_COUNT:
f3eb5384
SW		 468 dedata->mask.perm = 0x1;
469 dedata->attributes.operation = basepriv->attrib.operation;
470 break;
471 case DASD_ECKD_CCW_READ_TRACK_DATA:
472 dedata->mask.perm = 0x1;
473 dedata->attributes.operation = basepriv->attrib.operation;
474 dedata->blk_size = 0;
8e09f215
SW		 475 break;
476 case DASD_ECKD_CCW_WRITE:
477 case DASD_ECKD_CCW_WRITE_MT:
478 case DASD_ECKD_CCW_WRITE_KD:
479 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 480 dedata->mask.perm = 0x02;
481 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 482 rc = check_XRC_on_prefix(pfxdata, basedev);
483 break;
484 case DASD_ECKD_CCW_WRITE_CKD:
485 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 486 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 487 rc = check_XRC_on_prefix(pfxdata, basedev);
488 break;
489 case DASD_ECKD_CCW_ERASE:
490 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
491 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 492 dedata->mask.perm = 0x3;
493 dedata->mask.auth = 0x1;
494 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 495 rc = check_XRC_on_prefix(pfxdata, basedev);
496 break;
f3eb5384
SW		 497 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
498 dedata->mask.perm = 0x02;
499 dedata->attributes.operation = basepriv->attrib.operation;
500 dedata->blk_size = blksize;
501 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 502 break;
f3eb5384
SW		 503 default:
504 DBF_DEV_EVENT(DBF_ERR, basedev,
505 "PFX LRE unknown opcode 0x%x", cmd);
506 BUG();
507 return -EINVAL;
8e09f215
SW		 508 }
509
f3eb5384 510 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 511
512 if ((basepriv->rdc_data.cu_type == 0x2105 ||
513 basepriv->rdc_data.cu_type == 0x2107 ||
514 basepriv->rdc_data.cu_type == 0x1750)
515 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 516 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 517
b44b0ab3
SW		 518 heads = basepriv->rdc_data.trk_per_cyl;
519 begcyl = trk / heads;
520 beghead = trk % heads;
521 endcyl = totrk / heads;
522 endhead = totrk % heads;
8e09f215
SW		 523
524 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 525 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
526 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 527
b44b0ab3
SW		 528 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
529 endcyl += basepriv->attrib.nr_cyl;
8e09f215 530 else
b44b0ab3 531 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 532 }
533
f3eb5384
SW		 534 set_ch_t(&dedata->beg_ext, begcyl, beghead);
535 set_ch_t(&dedata->end_ext, endcyl, endhead);
536
537 if (format == 1) {
538 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
539 basedev, blksize, tlf);
540 }
541
8e09f215
SW		 542 return rc;
543}
544
f3eb5384
SW		 545static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
546 unsigned int trk, unsigned int totrk, int cmd,
547 struct dasd_device *basedev, struct dasd_device *startdev)
548{
549 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
550 0, 0, 0, 0, 0);
551}
552
4d284cac 553static void
b44b0ab3
SW		 554locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
555 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 556 struct dasd_device * device, int reclen)
557{
558 struct dasd_eckd_private *private;
559 int sector;
560 int dn, d;
138c014d 561
1da177e4
LT		 562 private = (struct dasd_eckd_private *) device->private;
563
564 DBF_DEV_EVENT(DBF_INFO, device,
565 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
566 trk, rec_on_trk, no_rec, cmd, reclen);
567
568 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
569 ccw->flags = 0;
570 ccw->count = 16;
571 ccw->cda = (__u32) __pa(data);
572
8e09f215 573 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 574 sector = 0;
575 if (rec_on_trk) {
576 switch (private->rdc_data.dev_type) {
577 case 0x3390:
578 dn = ceil_quot(reclen + 6, 232);
579 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
580 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
581 break;
582 case 0x3380:
583 d = 7 + ceil_quot(reclen + 12, 32);
584 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
585 break;
586 }
587 }
588 data->sector = sector;
589 data->count = no_rec;
590 switch (cmd) {
591 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
592 data->operation.orientation = 0x3;
593 data->operation.operation = 0x03;
594 break;
595 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
596 data->operation.orientation = 0x3;
597 data->operation.operation = 0x16;
598 break;
599 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
600 data->operation.orientation = 0x1;
601 data->operation.operation = 0x03;
602 data->count++;
603 break;
604 case DASD_ECKD_CCW_READ_RECORD_ZERO:
605 data->operation.orientation = 0x3;
606 data->operation.operation = 0x16;
607 data->count++;
608 break;
609 case DASD_ECKD_CCW_WRITE:
610 case DASD_ECKD_CCW_WRITE_MT:
611 case DASD_ECKD_CCW_WRITE_KD:
612 case DASD_ECKD_CCW_WRITE_KD_MT:
613 data->auxiliary.last_bytes_used = 0x1;
614 data->length = reclen;
615 data->operation.operation = 0x01;
616 break;
617 case DASD_ECKD_CCW_WRITE_CKD:
618 case DASD_ECKD_CCW_WRITE_CKD_MT:
619 data->auxiliary.last_bytes_used = 0x1;
620 data->length = reclen;
621 data->operation.operation = 0x03;
622 break;
623 case DASD_ECKD_CCW_READ:
624 case DASD_ECKD_CCW_READ_MT:
625 case DASD_ECKD_CCW_READ_KD:
626 case DASD_ECKD_CCW_READ_KD_MT:
627 data->auxiliary.last_bytes_used = 0x1;
628 data->length = reclen;
629 data->operation.operation = 0x06;
630 break;
631 case DASD_ECKD_CCW_READ_CKD:
632 case DASD_ECKD_CCW_READ_CKD_MT:
633 data->auxiliary.last_bytes_used = 0x1;
634 data->length = reclen;
635 data->operation.operation = 0x16;
636 break;
637 case DASD_ECKD_CCW_READ_COUNT:
638 data->operation.operation = 0x06;
639 break;
640 case DASD_ECKD_CCW_ERASE:
641 data->length = reclen;
642 data->auxiliary.last_bytes_used = 0x1;
643 data->operation.operation = 0x0b;
644 break;
645 default:
fc19f381
SH		 646 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
647 "opcode 0x%x", cmd);
1da177e4 648 }
b44b0ab3
SW		 649 set_ch_t(&data->seek_addr,
650 trk / private->rdc_data.trk_per_cyl,
651 trk % private->rdc_data.trk_per_cyl);
652 data->search_arg.cyl = data->seek_addr.cyl;
653 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 654 data->search_arg.record = rec_on_trk;
655}
656
657/*
658 * Returns 1 if the block is one of the special blocks that needs
659 * to get read/written with the KD variant of the command.
660 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
661 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
662 * Luckily the KD variants differ only by one bit (0x08) from the
663 * normal variant. So don't wonder about code like:
664 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
665 * ccw->cmd_code |= 0x8;
666 */
667static inline int
668dasd_eckd_cdl_special(int blk_per_trk, int recid)
669{
670 if (recid < 3)
671 return 1;
672 if (recid < blk_per_trk)
673 return 0;
674 if (recid < 2 * blk_per_trk)
675 return 1;
676 return 0;
677}
678
679/*
680 * Returns the record size for the special blocks of the cdl format.
681 * Only returns something useful if dasd_eckd_cdl_special is true
682 * for the recid.
683 */
684static inline int
685dasd_eckd_cdl_reclen(int recid)
686{
687 if (recid < 3)
688 return sizes_trk0[recid];
689 return LABEL_SIZE;
690}
691
3d052595
HH		 692/*
693 * Generate device unique id that specifies the physical device.
694 */
4abb08c2
SW		 695static int dasd_eckd_generate_uid(struct dasd_device *device,
696 struct dasd_uid *uid)
3d052595
HH		 697{
698 struct dasd_eckd_private *private;
4abb08c2 699 int count;
3d052595
HH		 700
701 private = (struct dasd_eckd_private *) device->private;
702 if (!private)
703 return -ENODEV;
4abb08c2 704 if (!private->ned || !private->gneq)
3d052595
HH		 705 return -ENODEV;
706
707 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 708 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 709 sizeof(uid->vendor) - 1);
3d052595 710 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 711 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 712 sizeof(uid->serial) - 1);
3d052595 713 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 714 uid->ssid = private->gneq->subsystemID;
a419aef8 715 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 716 if (private->sneq) {
717 uid->type = private->sneq->sua_flags;
8e09f215 718 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 719 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 720 } else {
721 uid->type = UA_BASE_DEVICE;
722 }
4abb08c2
SW		 723 if (private->vdsneq) {
724 for (count = 0; count < 16; count++) {
725 sprintf(uid->vduit+2*count, "%02x",
726 private->vdsneq->uit[count]);
727 }
728 }
3d052595
HH		 729 return 0;
730}
731
763968e2
HC		 732static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
733 void *rcd_buffer,
734 struct ciw *ciw, __u8 lpm)
17283b56
CH		 735{
736 struct dasd_ccw_req *cqr;
737 struct ccw1 *ccw;
738
68b781fe
SH		 739 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count,
740 device);
17283b56
CH		 741
742 if (IS_ERR(cqr)) {
fc19f381
SH		 743 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
744 "Could not allocate RCD request");
17283b56
CH		 745 return cqr;
746 }
747
748 ccw = cqr->cpaddr;
749 ccw->cmd_code = ciw->cmd;
750 ccw->cda = (__u32)(addr_t)rcd_buffer;
751 ccw->count = ciw->count;
752
8e09f215
SW		 753 cqr->startdev = device;
754 cqr->memdev = device;
755 cqr->block = NULL;
17283b56
CH		 756 cqr->expires = 10*HZ;
757 cqr->lpm = lpm;
eb6e199b 758 cqr->retries = 256;
17283b56
CH		 759 cqr->buildclk = get_clock();
760 cqr->status = DASD_CQR_FILLED;
761 return cqr;
762}
763
764static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
765 void **rcd_buffer,
766 int *rcd_buffer_size, __u8 lpm)
767{
768 struct ciw *ciw;
769 char *rcd_buf = NULL;
770 int ret;
771 struct dasd_ccw_req *cqr;
772
773 /*
774 * scan for RCD command in extended SenseID data
775 */
776 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
777 if (!ciw || ciw->cmd == 0) {
778 ret = -EOPNOTSUPP;
779 goto out_error;
780 }
781 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
782 if (!rcd_buf) {
783 ret = -ENOMEM;
784 goto out_error;
785 }
4abb08c2
SW		 786
787 /*
788 * buffer has to start with EBCDIC "V1.0" to show
789 * support for virtual device SNEQ
790 */
791 rcd_buf[0] = 0xE5;
792 rcd_buf[1] = 0xF1;
793 rcd_buf[2] = 0x4B;
794 rcd_buf[3] = 0xF0;
17283b56
CH		 795 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
796 if (IS_ERR(cqr)) {
797 ret = PTR_ERR(cqr);
798 goto out_error;
799 }
800 ret = dasd_sleep_on(cqr);
801 /*
802 * on success we update the user input parms
803 */
8e09f215 804 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 805 if (ret)
806 goto out_error;
807
808 *rcd_buffer_size = ciw->count;
809 *rcd_buffer = rcd_buf;
810 return 0;
811out_error:
812 kfree(rcd_buf);
813 *rcd_buffer = NULL;
814 *rcd_buffer_size = 0;
815 return ret;
816}
817
4abb08c2
SW		 818static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
819{
820
821 struct dasd_sneq *sneq;
822 int i, count;
823
824 private->ned = NULL;
825 private->sneq = NULL;
826 private->vdsneq = NULL;
827 private->gneq = NULL;
828 count = private->conf_len / sizeof(struct dasd_sneq);
829 sneq = (struct dasd_sneq *)private->conf_data;
830 for (i = 0; i < count; ++i) {
831 if (sneq->flags.identifier == 1 && sneq->format == 1)
832 private->sneq = sneq;
833 else if (sneq->flags.identifier == 1 && sneq->format == 4)
834 private->vdsneq = (struct vd_sneq *)sneq;
835 else if (sneq->flags.identifier == 2)
836 private->gneq = (struct dasd_gneq *)sneq;
837 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
838 private->ned = (struct dasd_ned *)sneq;
839 sneq++;
840 }
841 if (!private->ned || !private->gneq) {
842 private->ned = NULL;
843 private->sneq = NULL;
844 private->vdsneq = NULL;
845 private->gneq = NULL;
846 return -EINVAL;
847 }
848 return 0;
849
850};
851
852static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
853{
854 struct dasd_gneq *gneq;
855 int i, count, found;
856
857 count = conf_len / sizeof(*gneq);
858 gneq = (struct dasd_gneq *)conf_data;
859 found = 0;
860 for (i = 0; i < count; ++i) {
861 if (gneq->flags.identifier == 2) {
862 found = 1;
863 break;
864 }
865 gneq++;
866 }
867 if (found)
868 return ((char *)gneq)[18] & 0x07;
869 else
870 return 0;
871}
872
873static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 874{
875 void *conf_data;
876 int conf_len, conf_data_saved;
877 int rc;
878 __u8 lpm;
879 struct dasd_eckd_private *private;
880 struct dasd_eckd_path *path_data;
881
882 private = (struct dasd_eckd_private *) device->private;
883 path_data = (struct dasd_eckd_path *) &private->path_data;
884 path_data->opm = ccw_device_get_path_mask(device->cdev);
885 lpm = 0x80;
886 conf_data_saved = 0;
1da177e4
LT		 887 /* get configuration data per operational path */
888 for (lpm = 0x80; lpm; lpm>>= 1) {
889 if (lpm & path_data->opm){
17283b56
CH		 890 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
891 &conf_len, lpm);
1da177e4 892 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
b8ed5dd5 893 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
fc19f381 894 "Read configuration data returned "
b8ed5dd5 895 "error %d", rc);
1da177e4
LT		 896 return rc;
897 }
898 if (conf_data == NULL) {
b8ed5dd5
SH		 899 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
900 "No configuration data "
901 "retrieved");
d133a960 902 continue; /* no error */
1da177e4 903 }
1da177e4 904 /* save first valid configuration data */
4abb08c2
SW		 905 if (!conf_data_saved) {
906 kfree(private->conf_data);
907 private->conf_data = conf_data;
908 private->conf_len = conf_len;
909 if (dasd_eckd_identify_conf_parts(private)) {
910 private->conf_data = NULL;
911 private->conf_len = 0;
912 kfree(conf_data);
913 continue;
914 }
1da177e4
LT		 915 conf_data_saved++;
916 }
4abb08c2 917 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1da177e4
LT		 918 case 0x02:
919 path_data->npm |= lpm;
920 break;
921 case 0x03:
922 path_data->ppm |= lpm;
923 break;
924 }
4abb08c2
SW		 925 if (conf_data != private->conf_data)
926 kfree(conf_data);
1da177e4
LT		 927 }
928 }
929 return 0;
930}
931
8e09f215
SW		 932static int dasd_eckd_read_features(struct dasd_device *device)
933{
934 struct dasd_psf_prssd_data *prssdp;
935 struct dasd_rssd_features *features;
936 struct dasd_ccw_req *cqr;
937 struct ccw1 *ccw;
938 int rc;
939 struct dasd_eckd_private *private;
940
941 private = (struct dasd_eckd_private *) device->private;
68d1e5f0 942 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 943 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 944 (sizeof(struct dasd_psf_prssd_data) +
945 sizeof(struct dasd_rssd_features)),
946 device);
947 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 948 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
949 "allocate initialization request");
8e09f215
SW		 950 return PTR_ERR(cqr);
951 }
952 cqr->startdev = device;
953 cqr->memdev = device;
954 cqr->block = NULL;
eb6e199b 955 cqr->retries = 256;
8e09f215
SW		 956 cqr->expires = 10 * HZ;
957
958 /* Prepare for Read Subsystem Data */
959 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
960 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
961 prssdp->order = PSF_ORDER_PRSSD;
962 prssdp->suborder = 0x41; /* Read Feature Codes */
963 /* all other bytes of prssdp must be zero */
964
965 ccw = cqr->cpaddr;
966 ccw->cmd_code = DASD_ECKD_CCW_PSF;
967 ccw->count = sizeof(struct dasd_psf_prssd_data);
968 ccw->flags |= CCW_FLAG_CC;
969 ccw->cda = (__u32)(addr_t) prssdp;
970
971 /* Read Subsystem Data - feature codes */
972 features = (struct dasd_rssd_features *) (prssdp + 1);
973 memset(features, 0, sizeof(struct dasd_rssd_features));
974
975 ccw++;
976 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
977 ccw->count = sizeof(struct dasd_rssd_features);
978 ccw->cda = (__u32)(addr_t) features;
979
980 cqr->buildclk = get_clock();
981 cqr->status = DASD_CQR_FILLED;
982 rc = dasd_sleep_on(cqr);
983 if (rc == 0) {
984 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
985 features = (struct dasd_rssd_features *) (prssdp + 1);
986 memcpy(&private->features, features,
987 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 988 } else
989 dev_warn(&device->cdev->dev, "Reading device feature codes"
990 " failed with rc=%d\n", rc);
8e09f215
SW		 991 dasd_sfree_request(cqr, cqr->memdev);
992 return rc;
993}
994
995
40545573
HH		 996/*
997 * Build CP for Perform Subsystem Function - SSC.
998 */
f3eb5384
SW		 999static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1000 int enable_pav)
40545573 1001{
8e09f215
SW		 1002 struct dasd_ccw_req *cqr;
1003 struct dasd_psf_ssc_data *psf_ssc_data;
1004 struct ccw1 *ccw;
40545573 1005
68b781fe 1006 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1007 sizeof(struct dasd_psf_ssc_data),
1008 device);
1009
8e09f215 1010 if (IS_ERR(cqr)) {
fc19f381 1011 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1012 "Could not allocate PSF-SSC request");
8e09f215
SW		 1013 return cqr;
1014 }
1015 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1016 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1017 psf_ssc_data->suborder = 0xc0;
f3eb5384 1018 if (enable_pav) {
626350b6 1019 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1020 psf_ssc_data->reserved[0] = 0x88;
1021 }
8e09f215
SW		 1022 ccw = cqr->cpaddr;
1023 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1024 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1025 ccw->count = 66;
1026
1027 cqr->startdev = device;
1028 cqr->memdev = device;
1029 cqr->block = NULL;
eb6e199b 1030 cqr->retries = 256;
8e09f215
SW		 1031 cqr->expires = 10*HZ;
1032 cqr->buildclk = get_clock();
1033 cqr->status = DASD_CQR_FILLED;
1034 return cqr;
40545573
HH		 1035}
1036
1037/*
1038 * Perform Subsystem Function.
1039 * It is necessary to trigger CIO for channel revalidation since this
1040 * call might change behaviour of DASD devices.
1041 */
1042static int
f3eb5384 1043dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
40545573 1044{
8e09f215
SW		 1045 struct dasd_ccw_req *cqr;
1046 int rc;
1047
f3eb5384 1048 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1049 if (IS_ERR(cqr))
1050 return PTR_ERR(cqr);
1051
1052 rc = dasd_sleep_on(cqr);
1053 if (!rc)
1054 /* trigger CIO to reprobe devices */
1055 css_schedule_reprobe();
1056 dasd_sfree_request(cqr, cqr->memdev);
1057 return rc;
40545573
HH		 1058}
1059
1060/*
1061 * Valide storage server of current device.
1062 */
f4ac1d02 1063static void dasd_eckd_validate_server(struct dasd_device *device)
40545573
HH		 1064{
1065 int rc;
8e09f215 1066 struct dasd_eckd_private *private;
f3eb5384 1067 int enable_pav;
40545573 1068
40545573 1069 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1070 enable_pav = 0;
1071 else
1072 enable_pav = 1;
1073 rc = dasd_eckd_psf_ssc(device, enable_pav);
eb6e199b 1074
8e79a441
HH		 1075 /* may be requested feature is not available on server,
1076 * therefore just report error and go ahead */
8e09f215 1077 private = (struct dasd_eckd_private *) device->private;
b8ed5dd5
SH		 1078 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1079 "returned rc=%d", private->uid.ssid, rc);
40545573
HH		 1080}
1081
3d052595
HH		 1082/*
1083 * Check device characteristics.
1084 * If the device is accessible using ECKD discipline, the device is enabled.
1085 */
1da177e4
LT		 1086static int
1087dasd_eckd_check_characteristics(struct dasd_device *device)
1088{
1089 struct dasd_eckd_private *private;
8e09f215 1090 struct dasd_block *block;
8e09f215 1091 int is_known, rc;
33b62a30 1092 int readonly;
1da177e4 1093
454e1fa1
PO		 1094 if (!ccw_device_is_pathgroup(device->cdev)) {
1095 dev_warn(&device->cdev->dev,
1096 "A channel path group could not be established\n");
1097 return -EIO;
1098 }
1099 if (!ccw_device_is_multipath(device->cdev)) {
1100 dev_info(&device->cdev->dev,
1101 "The DASD is not operating in multipath mode\n");
1102 }
1da177e4 1103 private = (struct dasd_eckd_private *) device->private;
92636b15
SO		 1104 if (!private) {
1105 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1106 if (!private) {
fc19f381
SH		 1107 dev_warn(&device->cdev->dev,
1108 "Allocating memory for private DASD data "
1109 "failed\n");
1da177e4
LT		 1110 return -ENOMEM;
1111 }
1da177e4 1112 device->private = (void *) private;
92636b15
SO		 1113 } else {
1114 memset(private, 0, sizeof(*private));
1da177e4
LT		 1115 }
1116 /* Invalidate status of initial analysis. */
1117 private->init_cqr_status = -1;
1118 /* Set default cache operations. */
1119 private->attrib.operation = DASD_NORMAL_CACHE;
1120 private->attrib.nr_cyl = 0;
1121
40545573
HH		 1122 /* Read Configuration Data */
1123 rc = dasd_eckd_read_conf(device);
1124 if (rc)
8e09f215 1125 goto out_err1;
40545573
HH		 1126
1127 /* Generate device unique id and register in devmap */
8e09f215 1128 rc = dasd_eckd_generate_uid(device, &private->uid);
40545573 1129 if (rc)
8e09f215
SW		 1130 goto out_err1;
1131 dasd_set_uid(device->cdev, &private->uid);
1132
1133 if (private->uid.type == UA_BASE_DEVICE) {
1134 block = dasd_alloc_block();
1135 if (IS_ERR(block)) {
b8ed5dd5
SH		 1136 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1137 "could not allocate dasd "
1138 "block structure");
8e09f215
SW		 1139 rc = PTR_ERR(block);
1140 goto out_err1;
1141 }
1142 device->block = block;
1143 block->base = device;
1144 }
1145
1146 /* register lcu with alias handling, enable PAV if this is a new lcu */
1147 is_known = dasd_alias_make_device_known_to_lcu(device);
1148 if (is_known < 0) {
1149 rc = is_known;
1150 goto out_err2;
1151 }
f4ac1d02
SW		 1152 /*
1153 * dasd_eckd_vaildate_server is done on the first device that
1154 * is found for an LCU. All later other devices have to wait
1155 * for it, so they will read the correct feature codes.
1156 */
8e09f215 1157 if (!is_known) {
f4ac1d02
SW		 1158 dasd_eckd_validate_server(device);
1159 dasd_alias_lcu_setup_complete(device);
1160 } else
1161 dasd_alias_wait_for_lcu_setup(device);
1162
1163 /* device may report different configuration data after LCU setup */
1164 rc = dasd_eckd_read_conf(device);
1165 if (rc)
1166 goto out_err3;
8e09f215
SW		 1167
1168 /* Read Feature Codes */
68d1e5f0 1169 dasd_eckd_read_features(device);
40545573 1170
1da177e4 1171 /* Read Device Characteristics */
68b781fe
SH		 1172 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1173 &private->rdc_data, 64);
8e09f215 1174 if (rc) {
b8ed5dd5
SH		 1175 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1176 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1177 goto out_err3;
1178 }
b44b0ab3
SW		 1179 /* find the vaild cylinder size */
1180 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1181 private->rdc_data.long_no_cyl)
1182 private->real_cyl = private->rdc_data.long_no_cyl;
1183 else
1184 private->real_cyl = private->rdc_data.no_cyl;
1185
33b62a30
SW		 1186 readonly = dasd_device_is_ro(device);
1187 if (readonly)
1188 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1189
fc19f381 1190 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1191 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1192 private->rdc_data.dev_type,
1193 private->rdc_data.dev_model,
1194 private->rdc_data.cu_type,
1195 private->rdc_data.cu_model.model,
92636b15 1196 private->real_cyl,
fc19f381 1197 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1198 private->rdc_data.sec_per_trk,
1199 readonly ? ", read-only device" : "");
8e09f215
SW		 1200 return 0;
1201
1202out_err3:
1203 dasd_alias_disconnect_device_from_lcu(device);
1204out_err2:
1205 dasd_free_block(device->block);
1206 device->block = NULL;
1207out_err1:
4abb08c2 1208 kfree(private->conf_data);
8e09f215
SW		 1209 kfree(device->private);
1210 device->private = NULL;
3d052595 1211 return rc;
1da177e4
LT		 1212}
1213
8e09f215
SW		 1214static void dasd_eckd_uncheck_device(struct dasd_device *device)
1215{
4abb08c2
SW		 1216 struct dasd_eckd_private *private;
1217
1218 private = (struct dasd_eckd_private *) device->private;
8e09f215 1219 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1220 private->ned = NULL;
1221 private->sneq = NULL;
1222 private->vdsneq = NULL;
1223 private->gneq = NULL;
1224 private->conf_len = 0;
1225 kfree(private->conf_data);
1226 private->conf_data = NULL;
8e09f215
SW		 1227}
1228
1da177e4
LT		 1229static struct dasd_ccw_req *
1230dasd_eckd_analysis_ccw(struct dasd_device *device)
1231{
1232 struct dasd_eckd_private *private;
1233 struct eckd_count *count_data;
1234 struct LO_eckd_data *LO_data;
1235 struct dasd_ccw_req *cqr;
1236 struct ccw1 *ccw;
1237 int cplength, datasize;
1238 int i;
1239
1240 private = (struct dasd_eckd_private *) device->private;
1241
1242 cplength = 8;
1243 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1244 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1245 if (IS_ERR(cqr))
1246 return cqr;
1247 ccw = cqr->cpaddr;
1248 /* Define extent for the first 3 tracks. */
1249 define_extent(ccw++, cqr->data, 0, 2,
1250 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1251 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1252 /* Locate record for the first 4 records on track 0. */
1253 ccw[-1].flags |= CCW_FLAG_CC;
1254 locate_record(ccw++, LO_data++, 0, 0, 4,
1255 DASD_ECKD_CCW_READ_COUNT, device, 0);
1256
1257 count_data = private->count_area;
1258 for (i = 0; i < 4; i++) {
1259 ccw[-1].flags |= CCW_FLAG_CC;
1260 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1261 ccw->flags = 0;
1262 ccw->count = 8;
1263 ccw->cda = (__u32)(addr_t) count_data;
1264 ccw++;
1265 count_data++;
1266 }
1267
1268 /* Locate record for the first record on track 2. */
1269 ccw[-1].flags |= CCW_FLAG_CC;
1270 locate_record(ccw++, LO_data++, 2, 0, 1,
1271 DASD_ECKD_CCW_READ_COUNT, device, 0);
1272 /* Read count ccw. */
1273 ccw[-1].flags |= CCW_FLAG_CC;
1274 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1275 ccw->flags = 0;
1276 ccw->count = 8;
1277 ccw->cda = (__u32)(addr_t) count_data;
1278
8e09f215
SW		 1279 cqr->block = NULL;
1280 cqr->startdev = device;
1281 cqr->memdev = device;
eb6e199b 1282 cqr->retries = 255;
1da177e4
LT		 1283 cqr->buildclk = get_clock();
1284 cqr->status = DASD_CQR_FILLED;
1285 return cqr;
1286}
1287
eb6e199b
SW		 1288/* differentiate between 'no record found' and any other error */
1289static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1290{
1291 char *sense;
1292 if (init_cqr->status == DASD_CQR_DONE)
1293 return INIT_CQR_OK;
1294 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1295 init_cqr->status == DASD_CQR_FAILED) {
1296 sense = dasd_get_sense(&init_cqr->irb);
1297 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1298 return INIT_CQR_UNFORMATTED;
1299 else
1300 return INIT_CQR_ERROR;
1301 } else
1302 return INIT_CQR_ERROR;
1303}
1304
1da177e4
LT		 1305/*
1306 * This is the callback function for the init_analysis cqr. It saves
1307 * the status of the initial analysis ccw before it frees it and kicks
1308 * the device to continue the startup sequence. This will call
1309 * dasd_eckd_do_analysis again (if the devices has not been marked
1310 * for deletion in the meantime).
1311 */
eb6e199b
SW		 1312static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1313 void *data)
1da177e4
LT		 1314{
1315 struct dasd_eckd_private *private;
1316 struct dasd_device *device;
1317
8e09f215 1318 device = init_cqr->startdev;
1da177e4 1319 private = (struct dasd_eckd_private *) device->private;
eb6e199b 1320 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1321 dasd_sfree_request(init_cqr, device);
1322 dasd_kick_device(device);
1323}
1324
eb6e199b 1325static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4
LT		 1326{
1327 struct dasd_eckd_private *private;
1328 struct dasd_ccw_req *init_cqr;
1329
8e09f215
SW		 1330 private = (struct dasd_eckd_private *) block->base->private;
1331 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1332 if (IS_ERR(init_cqr))
1333 return PTR_ERR(init_cqr);
1334 init_cqr->callback = dasd_eckd_analysis_callback;
1335 init_cqr->callback_data = NULL;
1336 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1337 /* first try without ERP, so we can later handle unformatted
1338 * devices as special case
1339 */
1340 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1341 init_cqr->retries = 0;
1da177e4
LT		 1342 dasd_add_request_head(init_cqr);
1343 return -EAGAIN;
1344}
1345
eb6e199b 1346static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1347{
8e09f215 1348 struct dasd_device *device;
1da177e4
LT		 1349 struct dasd_eckd_private *private;
1350 struct eckd_count *count_area;
1351 unsigned int sb, blk_per_trk;
1352 int status, i;
eb6e199b 1353 struct dasd_ccw_req *init_cqr;
1da177e4 1354
8e09f215 1355 device = block->base;
1da177e4
LT		 1356 private = (struct dasd_eckd_private *) device->private;
1357 status = private->init_cqr_status;
1358 private->init_cqr_status = -1;
eb6e199b
SW		 1359 if (status == INIT_CQR_ERROR) {
1360 /* try again, this time with full ERP */
1361 init_cqr = dasd_eckd_analysis_ccw(device);
1362 dasd_sleep_on(init_cqr);
1363 status = dasd_eckd_analysis_evaluation(init_cqr);
1364 dasd_sfree_request(init_cqr, device);
1365 }
1366
1367 if (status == INIT_CQR_UNFORMATTED) {
1368 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1369 return -EMEDIUMTYPE;
eb6e199b
SW		 1370 } else if (status == INIT_CQR_ERROR) {
1371 dev_err(&device->cdev->dev,
1372 "Detecting the DASD disk layout failed because "
1373 "of an I/O error\n");
1374 return -EIO;
1da177e4
LT		 1375 }
1376
1377 private->uses_cdl = 1;
1da177e4
LT		 1378 /* Check Track 0 for Compatible Disk Layout */
1379 count_area = NULL;
1380 for (i = 0; i < 3; i++) {
1381 if (private->count_area[i].kl != 4 ||
1382 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1383 private->uses_cdl = 0;
1384 break;
1385 }
1386 }
1387 if (i == 3)
1388 count_area = &private->count_area[4];
1389
1390 if (private->uses_cdl == 0) {
1391 for (i = 0; i < 5; i++) {
1392 if ((private->count_area[i].kl != 0) ||
1393 (private->count_area[i].dl !=
1394 private->count_area[0].dl))
1395 break;
1396 }
1397 if (i == 5)
1398 count_area = &private->count_area[0];
1399 } else {
1400 if (private->count_area[3].record == 1)
fc19f381
SH		 1401 dev_warn(&device->cdev->dev,
1402 "Track 0 has no records following the VTOC\n");
1da177e4
LT		 1403 }
1404 if (count_area != NULL && count_area->kl == 0) {
1405 /* we found notthing violating our disk layout */
1406 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1407 block->bp_block = count_area->dl;
1da177e4 1408 }
8e09f215 1409 if (block->bp_block == 0) {
fc19f381
SH		 1410 dev_warn(&device->cdev->dev,
1411 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1412 return -EMEDIUMTYPE;
1413 }
8e09f215
SW		 1414 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1415 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1416 block->s2b_shift++;
1da177e4 1417
8e09f215 1418 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
b44b0ab3 1419 block->blocks = (private->real_cyl *
1da177e4
LT		 1420 private->rdc_data.trk_per_cyl *
1421 blk_per_trk);
1422
fc19f381
SH		 1423 dev_info(&device->cdev->dev,
1424 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1425 "%s\n", (block->bp_block >> 10),
1426 ((private->real_cyl *
1427 private->rdc_data.trk_per_cyl *
1428 blk_per_trk * (block->bp_block >> 9)) >> 1),
1429 ((blk_per_trk * block->bp_block) >> 10),
1430 private->uses_cdl ?
1431 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 1432
1433 return 0;
1434}
1435
8e09f215 1436static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4
LT		 1437{
1438 struct dasd_eckd_private *private;
1439
8e09f215 1440 private = (struct dasd_eckd_private *) block->base->private;
1da177e4 1441 if (private->init_cqr_status < 0)
8e09f215 1442 return dasd_eckd_start_analysis(block);
1da177e4 1443 else
8e09f215 1444 return dasd_eckd_end_analysis(block);
1da177e4
LT		 1445}
1446
8e09f215
SW		 1447static int dasd_eckd_ready_to_online(struct dasd_device *device)
1448{
1449 return dasd_alias_add_device(device);
1450};
1451
1452static int dasd_eckd_online_to_ready(struct dasd_device *device)
1453{
501183f2 1454 cancel_work_sync(&device->reload_device);
8e09f215
SW		 1455 return dasd_alias_remove_device(device);
1456};
1457
1da177e4 1458static int
8e09f215 1459dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4
LT		 1460{
1461 struct dasd_eckd_private *private;
1462
8e09f215
SW		 1463 private = (struct dasd_eckd_private *) block->base->private;
1464 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 1465 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 1466 0, block->bp_block);
1da177e4
LT		 1467 }
1468 geo->cylinders = private->rdc_data.no_cyl;
1469 geo->heads = private->rdc_data.trk_per_cyl;
1470 return 0;
1471}
1472
1473static struct dasd_ccw_req *
1474dasd_eckd_format_device(struct dasd_device * device,
1475 struct format_data_t * fdata)
1476{
1477 struct dasd_eckd_private *private;
1478 struct dasd_ccw_req *fcp;
1479 struct eckd_count *ect;
1480 struct ccw1 *ccw;
1481 void *data;
b44b0ab3
SW		 1482 int rpt;
1483 struct ch_t address;
1da177e4
LT		 1484 int cplength, datasize;
1485 int i;
f9a28f7b
JBJ		 1486 int intensity = 0;
1487 int r0_perm;
1da177e4
LT		 1488
1489 private = (struct dasd_eckd_private *) device->private;
1490 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
b44b0ab3
SW		 1491 set_ch_t(&address,
1492 fdata->start_unit / private->rdc_data.trk_per_cyl,
1493 fdata->start_unit % private->rdc_data.trk_per_cyl);
1da177e4
LT		 1494
1495 /* Sanity checks. */
1496 if (fdata->start_unit >=
b44b0ab3 1497 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
fc19f381
SH		 1498 dev_warn(&device->cdev->dev, "Start track number %d used in "
1499 "formatting is too big\n", fdata->start_unit);
1da177e4
LT		 1500 return ERR_PTR(-EINVAL);
1501 }
1502 if (fdata->start_unit > fdata->stop_unit) {
fc19f381
SH		 1503 dev_warn(&device->cdev->dev, "Start track %d used in "
1504 "formatting exceeds end track\n", fdata->start_unit);
1da177e4
LT		 1505 return ERR_PTR(-EINVAL);
1506 }
1507 if (dasd_check_blocksize(fdata->blksize) != 0) {
fc19f381
SH		 1508 dev_warn(&device->cdev->dev,
1509 "The DASD cannot be formatted with block size %d\n",
1510 fdata->blksize);
1da177e4
LT		 1511 return ERR_PTR(-EINVAL);
1512 }
1513
1514 /*
1515 * fdata->intensity is a bit string that tells us what to do:
1516 * Bit 0: write record zero
1517 * Bit 1: write home address, currently not supported
1518 * Bit 2: invalidate tracks
1519 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 1520 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 1521 * Only some bit combinations do make sense.
1522 */
f9a28f7b
JBJ		 1523 if (fdata->intensity & 0x10) {
1524 r0_perm = 0;
1525 intensity = fdata->intensity & ~0x10;
1526 } else {
1527 r0_perm = 1;
1528 intensity = fdata->intensity;
1529 }
1530 switch (intensity) {
1da177e4
LT		 1531 case 0x00: /* Normal format */
1532 case 0x08: /* Normal format, use cdl. */
1533 cplength = 2 + rpt;
1534 datasize = sizeof(struct DE_eckd_data) +
1535 sizeof(struct LO_eckd_data) +
1536 rpt * sizeof(struct eckd_count);
1537 break;
1538 case 0x01: /* Write record zero and format track. */
1539 case 0x09: /* Write record zero and format track, use cdl. */
1540 cplength = 3 + rpt;
1541 datasize = sizeof(struct DE_eckd_data) +
1542 sizeof(struct LO_eckd_data) +
1543 sizeof(struct eckd_count) +
1544 rpt * sizeof(struct eckd_count);
1545 break;
1546 case 0x04: /* Invalidate track. */
1547 case 0x0c: /* Invalidate track, use cdl. */
1548 cplength = 3;
1549 datasize = sizeof(struct DE_eckd_data) +
1550 sizeof(struct LO_eckd_data) +
1551 sizeof(struct eckd_count);
1552 break;
1553 default:
fc19f381
SH		 1554 dev_warn(&device->cdev->dev, "An I/O control call used "
1555 "incorrect flags 0x%x\n", fdata->intensity);
1da177e4
LT		 1556 return ERR_PTR(-EINVAL);
1557 }
1558 /* Allocate the format ccw request. */
68b781fe 1559 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1560 if (IS_ERR(fcp))
1561 return fcp;
1562
1563 data = fcp->data;
1564 ccw = fcp->cpaddr;
1565
f9a28f7b 1566 switch (intensity & ~0x08) {
1da177e4
LT		 1567 case 0x00: /* Normal format. */
1568 define_extent(ccw++, (struct DE_eckd_data *) data,
1569 fdata->start_unit, fdata->start_unit,
1570 DASD_ECKD_CCW_WRITE_CKD, device);
f9a28f7b
JBJ		 1571 /* grant subsystem permission to format R0 */
1572 if (r0_perm)
1573 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1da177e4
LT		 1574 data += sizeof(struct DE_eckd_data);
1575 ccw[-1].flags |= CCW_FLAG_CC;
1576 locate_record(ccw++, (struct LO_eckd_data *) data,
1577 fdata->start_unit, 0, rpt,
1578 DASD_ECKD_CCW_WRITE_CKD, device,
1579 fdata->blksize);
1580 data += sizeof(struct LO_eckd_data);
1581 break;
1582 case 0x01: /* Write record zero + format track. */
1583 define_extent(ccw++, (struct DE_eckd_data *) data,
1584 fdata->start_unit, fdata->start_unit,
1585 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1586 device);
1587 data += sizeof(struct DE_eckd_data);
1588 ccw[-1].flags |= CCW_FLAG_CC;
1589 locate_record(ccw++, (struct LO_eckd_data *) data,
1590 fdata->start_unit, 0, rpt + 1,
1591 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
8e09f215 1592 device->block->bp_block);
1da177e4
LT		 1593 data += sizeof(struct LO_eckd_data);
1594 break;
1595 case 0x04: /* Invalidate track. */
1596 define_extent(ccw++, (struct DE_eckd_data *) data,
1597 fdata->start_unit, fdata->start_unit,
1598 DASD_ECKD_CCW_WRITE_CKD, device);
1599 data += sizeof(struct DE_eckd_data);
1600 ccw[-1].flags |= CCW_FLAG_CC;
1601 locate_record(ccw++, (struct LO_eckd_data *) data,
1602 fdata->start_unit, 0, 1,
1603 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1604 data += sizeof(struct LO_eckd_data);
1605 break;
1606 }
f9a28f7b 1607 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 1608 ect = (struct eckd_count *) data;
1609 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1610 ect->cyl = address.cyl;
1611 ect->head = address.head;
1da177e4
LT		 1612 ect->record = 0;
1613 ect->kl = 0;
1614 ect->dl = 8;
1615 ccw[-1].flags |= CCW_FLAG_CC;
1616 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1617 ccw->flags = CCW_FLAG_SLI;
1618 ccw->count = 8;
1619 ccw->cda = (__u32)(addr_t) ect;
1620 ccw++;
1621 }
f9a28f7b 1622 if ((intensity & ~0x08) & 0x04) { /* erase track */
1da177e4
LT		 1623 ect = (struct eckd_count *) data;
1624 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1625 ect->cyl = address.cyl;
1626 ect->head = address.head;
1da177e4
LT		 1627 ect->record = 1;
1628 ect->kl = 0;
1629 ect->dl = 0;
1630 ccw[-1].flags |= CCW_FLAG_CC;
1631 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1632 ccw->flags = CCW_FLAG_SLI;
1633 ccw->count = 8;
1634 ccw->cda = (__u32)(addr_t) ect;
1635 } else { /* write remaining records */
1636 for (i = 0; i < rpt; i++) {
1637 ect = (struct eckd_count *) data;
1638 data += sizeof(struct eckd_count);
b44b0ab3
SW		 1639 ect->cyl = address.cyl;
1640 ect->head = address.head;
1da177e4
LT		 1641 ect->record = i + 1;
1642 ect->kl = 0;
1643 ect->dl = fdata->blksize;
1644 /* Check for special tracks 0-1 when formatting CDL */
f9a28f7b 1645 if ((intensity & 0x08) &&
1da177e4
LT		 1646 fdata->start_unit == 0) {
1647 if (i < 3) {
1648 ect->kl = 4;
1649 ect->dl = sizes_trk0[i] - 4;
138c014d 1650 }
1da177e4 1651 }
f9a28f7b 1652 if ((intensity & 0x08) &&
1da177e4
LT		 1653 fdata->start_unit == 1) {
1654 ect->kl = 44;
1655 ect->dl = LABEL_SIZE - 44;
1656 }
1657 ccw[-1].flags |= CCW_FLAG_CC;
1658 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1659 ccw->flags = CCW_FLAG_SLI;
1660 ccw->count = 8;
1661 ccw->cda = (__u32)(addr_t) ect;
1662 ccw++;
1663 }
1664 }
8e09f215
SW		 1665 fcp->startdev = device;
1666 fcp->memdev = device;
eb6e199b 1667 fcp->retries = 256;
1da177e4
LT		 1668 fcp->buildclk = get_clock();
1669 fcp->status = DASD_CQR_FILLED;
1670 return fcp;
1671}
1672
8e09f215 1673static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 1674{
8e09f215
SW		 1675 cqr->status = DASD_CQR_FILLED;
1676 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1677 dasd_eckd_reset_ccw_to_base_io(cqr);
1678 cqr->startdev = cqr->block->base;
1da177e4 1679 }
8e09f215 1680};
1da177e4
LT		 1681
1682static dasd_erp_fn_t
1683dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1684{
8e09f215 1685 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 1686 struct ccw_device *cdev = device->cdev;
1687
1688 switch (cdev->id.cu_type) {
1689 case 0x3990:
1690 case 0x2105:
1691 case 0x2107:
1692 case 0x1750:
1693 return dasd_3990_erp_action;
1694 case 0x9343:
1695 case 0x3880:
1696 default:
1697 return dasd_default_erp_action;
1698 }
1699}
1700
1701static dasd_erp_fn_t
1702dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1703{
1704 return dasd_default_erp_postaction;
1705}
1706
8e09f215
SW		 1707
1708static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1709 struct irb *irb)
1710{
1711 char mask;
f3eb5384 1712 char *sense = NULL;
501183f2 1713 struct dasd_eckd_private *private;
8e09f215 1714
501183f2 1715 private = (struct dasd_eckd_private *) device->private;
8e09f215
SW		 1716 /* first of all check for state change pending interrupt */
1717 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 1718 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
501183f2
SH		 1719 /* for alias only and not in offline processing*/
1720 if (!device->block && private->lcu &&
1721 !test_bit(DASD_FLAG_OFFLINE, &device->flags)) {
1722 /*
1723 * the state change could be caused by an alias
1724 * reassignment remove device from alias handling
1725 * to prevent new requests from being scheduled on
1726 * the wrong alias device
1727 */
1728 dasd_alias_remove_device(device);
1729
1730 /* schedule worker to reload device */
1731 dasd_reload_device(device);
1732 }
1733
8e09f215
SW		 1734 dasd_generic_handle_state_change(device);
1735 return;
1736 }
1737
1738 /* summary unit check */
f3eb5384 1739 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
23d805b6 1740 (irb->ecw[7] == 0x0D)) {
8e09f215
SW		 1741 dasd_alias_handle_summary_unit_check(device, irb);
1742 return;
1743 }
1744
f3eb5384 1745 sense = dasd_get_sense(irb);
f60c768c 1746 /* service information message SIM */
f3eb5384
SW		 1747 if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1748 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1749 dasd_3990_erp_handle_sim(device, sense);
9d853caf 1750 dasd_schedule_device_bh(device);
f60c768c
SH		 1751 return;
1752 }
1753
f3eb5384
SW		 1754 if ((scsw_cc(&irb->scsw) == 1) &&
1755 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1756 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1757 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
ada3df91
SH		 1758 /* fake irb do nothing, they are handled elsewhere */
1759 dasd_schedule_device_bh(device);
1760 return;
1761 }
8e09f215 1762
f3eb5384 1763 if (!sense) {
ada3df91 1764 /* just report other unsolicited interrupts */
fc19f381 1765 DBF_DEV_EVENT(DBF_ERR, device, "%s",
ada3df91
SH		 1766 "unsolicited interrupt received");
1767 } else {
fc19f381 1768 DBF_DEV_EVENT(DBF_ERR, device, "%s",
ada3df91
SH		 1769 "unsolicited interrupt received "
1770 "(sense available)");
aeec92ca 1771 device->discipline->dump_sense_dbf(device, irb, "unsolicited");
ada3df91
SH		 1772 }
1773
1774 dasd_schedule_device_bh(device);
8e09f215
SW		 1775 return;
1776};
1777
f3eb5384
SW		 1778
1779static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1780 struct dasd_device *startdev,
8e09f215 1781 struct dasd_block *block,
f3eb5384
SW		 1782 struct request *req,
1783 sector_t first_rec,
1784 sector_t last_rec,
1785 sector_t first_trk,
1786 sector_t last_trk,
1787 unsigned int first_offs,
1788 unsigned int last_offs,
1789 unsigned int blk_per_trk,
1790 unsigned int blksize)
1da177e4
LT		 1791{
1792 struct dasd_eckd_private *private;
1793 unsigned long *idaws;
1794 struct LO_eckd_data *LO_data;
1795 struct dasd_ccw_req *cqr;
1796 struct ccw1 *ccw;
5705f702 1797 struct req_iterator iter;
1da177e4
LT		 1798 struct bio_vec *bv;
1799 char *dst;
f3eb5384 1800 unsigned int off;
1da177e4 1801 int count, cidaw, cplength, datasize;
f3eb5384 1802 sector_t recid;
1da177e4 1803 unsigned char cmd, rcmd;
8e09f215
SW		 1804 int use_prefix;
1805 struct dasd_device *basedev;
1da177e4 1806
8e09f215
SW		 1807 basedev = block->base;
1808 private = (struct dasd_eckd_private *) basedev->private;
1da177e4
LT		 1809 if (rq_data_dir(req) == READ)
1810 cmd = DASD_ECKD_CCW_READ_MT;
1811 else if (rq_data_dir(req) == WRITE)
1812 cmd = DASD_ECKD_CCW_WRITE_MT;
1813 else
1814 return ERR_PTR(-EINVAL);
f3eb5384 1815
1da177e4
LT		 1816 /* Check struct bio and count the number of blocks for the request. */
1817 count = 0;
1818 cidaw = 0;
5705f702 1819 rq_for_each_segment(bv, req, iter) {
6c92e699
JA		 1820 if (bv->bv_len & (blksize - 1))
1821 /* Eckd can only do full blocks. */
1822 return ERR_PTR(-EINVAL);
8e09f215 1823 count += bv->bv_len >> (block->s2b_shift + 9);
347a8dc3 1824#if defined(CONFIG_64BIT)
6c92e699 1825 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
8e09f215 1826 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1da177e4 1827#endif
1da177e4
LT		 1828 }
1829 /* Paranoia. */
1830 if (count != last_rec - first_rec + 1)
1831 return ERR_PTR(-EINVAL);
8e09f215
SW		 1832
1833 /* use the prefix command if available */
1834 use_prefix = private->features.feature[8] & 0x01;
1835 if (use_prefix) {
1836 /* 1x prefix + number of blocks */
1837 cplength = 2 + count;
1838 /* 1x prefix + cidaws*sizeof(long) */
1839 datasize = sizeof(struct PFX_eckd_data) +
1840 sizeof(struct LO_eckd_data) +
1841 cidaw * sizeof(unsigned long);
1842 } else {
1843 /* 1x define extent + 1x locate record + number of blocks */
1844 cplength = 2 + count;
1845 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1846 datasize = sizeof(struct DE_eckd_data) +
1847 sizeof(struct LO_eckd_data) +
1848 cidaw * sizeof(unsigned long);
1849 }
1da177e4
LT		 1850 /* Find out the number of additional locate record ccws for cdl. */
1851 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1852 if (last_rec >= 2*blk_per_trk)
1853 count = 2*blk_per_trk - first_rec;
1854 cplength += count;
1855 datasize += count*sizeof(struct LO_eckd_data);
1856 }
1857 /* Allocate the ccw request. */
68b781fe
SH		 1858 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1859 startdev);
1da177e4
LT		 1860 if (IS_ERR(cqr))
1861 return cqr;
1862 ccw = cqr->cpaddr;
8e09f215
SW		 1863 /* First ccw is define extent or prefix. */
1864 if (use_prefix) {
1865 if (prefix(ccw++, cqr->data, first_trk,
1866 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1867 /* Clock not in sync and XRC is enabled.
1868 * Try again later.
1869 */
1870 dasd_sfree_request(cqr, startdev);
1871 return ERR_PTR(-EAGAIN);
1872 }
1873 idaws = (unsigned long *) (cqr->data +
1874 sizeof(struct PFX_eckd_data));
1875 } else {
1876 if (define_extent(ccw++, cqr->data, first_trk,
1877 last_trk, cmd, startdev) == -EAGAIN) {
1878 /* Clock not in sync and XRC is enabled.
1879 * Try again later.
1880 */
1881 dasd_sfree_request(cqr, startdev);
1882 return ERR_PTR(-EAGAIN);
1883 }
1884 idaws = (unsigned long *) (cqr->data +
1885 sizeof(struct DE_eckd_data));
d54853ef 1886 }
1da177e4 1887 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 1888 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1889 recid = first_rec;
1890 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1891 /* Only standard blocks so there is just one locate record. */
1892 ccw[-1].flags |= CCW_FLAG_CC;
1893 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 1894 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 1895 }
5705f702 1896 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 1897 dst = page_address(bv->bv_page) + bv->bv_offset;
1898 if (dasd_page_cache) {
1899 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 1900 GFP_DMA | __GFP_NOWARN);
1da177e4
LT		 1901 if (copy && rq_data_dir(req) == WRITE)
1902 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1903 if (copy)
1904 dst = copy + bv->bv_offset;
1905 }
1906 for (off = 0; off < bv->bv_len; off += blksize) {
1907 sector_t trkid = recid;
1908 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1909 rcmd = cmd;
1910 count = blksize;
1911 /* Locate record for cdl special block ? */
1912 if (private->uses_cdl && recid < 2*blk_per_trk) {
1913 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1914 rcmd |= 0x8;
1915 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 1916 if (count < blksize &&
1917 rq_data_dir(req) == READ)
1da177e4
LT		 1918 memset(dst + count, 0xe5,
1919 blksize - count);
1920 }
1921 ccw[-1].flags |= CCW_FLAG_CC;
1922 locate_record(ccw++, LO_data++,
1923 trkid, recoffs + 1,
8e09f215 1924 1, rcmd, basedev, count);
1da177e4
LT		 1925 }
1926 /* Locate record for standard blocks ? */
1927 if (private->uses_cdl && recid == 2*blk_per_trk) {
1928 ccw[-1].flags |= CCW_FLAG_CC;
1929 locate_record(ccw++, LO_data++,
1930 trkid, recoffs + 1,
1931 last_rec - recid + 1,
8e09f215 1932 cmd, basedev, count);
1da177e4
LT		 1933 }
1934 /* Read/write ccw. */
1935 ccw[-1].flags |= CCW_FLAG_CC;
1936 ccw->cmd_code = rcmd;
1937 ccw->count = count;
1938 if (idal_is_needed(dst, blksize)) {
1939 ccw->cda = (__u32)(addr_t) idaws;
1940 ccw->flags = CCW_FLAG_IDA;
1941 idaws = idal_create_words(idaws, dst, blksize);
1942 } else {
1943 ccw->cda = (__u32)(addr_t) dst;
1944 ccw->flags = 0;
1945 }
1946 ccw++;
1947 dst += blksize;
1948 recid++;
1949 }
1950 }
13de227b
HS		 1951 if (blk_noretry_request(req) ||
1952 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 1953 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 1954 cqr->startdev = startdev;
1955 cqr->memdev = startdev;
1956 cqr->block = block;
1da177e4
LT		 1957 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1958 cqr->lpm = private->path_data.ppm;
1959 cqr->retries = 256;
1960 cqr->buildclk = get_clock();
1961 cqr->status = DASD_CQR_FILLED;
1962 return cqr;
1963}
1964
f3eb5384
SW		 1965static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1966 struct dasd_device *startdev,
1967 struct dasd_block *block,
1968 struct request *req,
1969 sector_t first_rec,
1970 sector_t last_rec,
1971 sector_t first_trk,
1972 sector_t last_trk,
1973 unsigned int first_offs,
1974 unsigned int last_offs,
1975 unsigned int blk_per_trk,
1976 unsigned int blksize)
1977{
1978 struct dasd_eckd_private *private;
1979 unsigned long *idaws;
1980 struct dasd_ccw_req *cqr;
1981 struct ccw1 *ccw;
1982 struct req_iterator iter;
1983 struct bio_vec *bv;
1984 char *dst, *idaw_dst;
1985 unsigned int cidaw, cplength, datasize;
1986 unsigned int tlf;
1987 sector_t recid;
1988 unsigned char cmd;
1989 struct dasd_device *basedev;
1990 unsigned int trkcount, count, count_to_trk_end;
1991 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
1992 unsigned char new_track, end_idaw;
1993 sector_t trkid;
1994 unsigned int recoffs;
1995
1996 basedev = block->base;
1997 private = (struct dasd_eckd_private *) basedev->private;
1998 if (rq_data_dir(req) == READ)
1999 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2000 else if (rq_data_dir(req) == WRITE)
2001 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2002 else
2003 return ERR_PTR(-EINVAL);
2004
2005 /* Track based I/O needs IDAWs for each page, and not just for
2006 * 64 bit addresses. We need additional idals for pages
2007 * that get filled from two tracks, so we use the number
2008 * of records as upper limit.
2009 */
2010 cidaw = last_rec - first_rec + 1;
2011 trkcount = last_trk - first_trk + 1;
2012
2013 /* 1x prefix + one read/write ccw per track */
2014 cplength = 1 + trkcount;
2015
2016 /* on 31-bit we need space for two 32 bit addresses per page
2017 * on 64-bit one 64 bit address
2018 */
2019 datasize = sizeof(struct PFX_eckd_data) +
2020 cidaw * sizeof(unsigned long long);
2021
2022 /* Allocate the ccw request. */
68b781fe
SH		 2023 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2024 startdev);
f3eb5384
SW		 2025 if (IS_ERR(cqr))
2026 return cqr;
2027 ccw = cqr->cpaddr;
2028 /* transfer length factor: how many bytes to read from the last track */
2029 if (first_trk == last_trk)
2030 tlf = last_offs - first_offs + 1;
2031 else
2032 tlf = last_offs + 1;
2033 tlf *= blksize;
2034
2035 if (prefix_LRE(ccw++, cqr->data, first_trk,
2036 last_trk, cmd, basedev, startdev,
2037 1 /* format */, first_offs + 1,
2038 trkcount, blksize,
2039 tlf) == -EAGAIN) {
2040 /* Clock not in sync and XRC is enabled.
2041 * Try again later.
2042 */
2043 dasd_sfree_request(cqr, startdev);
2044 return ERR_PTR(-EAGAIN);
2045 }
2046
2047 /*
2048 * The translation of request into ccw programs must meet the
2049 * following conditions:
2050 * - all idaws but the first and the last must address full pages
2051 * (or 2K blocks on 31-bit)
2052 * - the scope of a ccw and it's idal ends with the track boundaries
2053 */
2054 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2055 recid = first_rec;
2056 new_track = 1;
2057 end_idaw = 0;
2058 len_to_track_end = 0;
2059 idaw_dst = 0;
2060 idaw_len = 0;
2061 rq_for_each_segment(bv, req, iter) {
2062 dst = page_address(bv->bv_page) + bv->bv_offset;
2063 seg_len = bv->bv_len;
2064 while (seg_len) {
2065 if (new_track) {
2066 trkid = recid;
2067 recoffs = sector_div(trkid, blk_per_trk);
2068 count_to_trk_end = blk_per_trk - recoffs;
2069 count = min((last_rec - recid + 1),
2070 (sector_t)count_to_trk_end);
2071 len_to_track_end = count * blksize;
2072 ccw[-1].flags |= CCW_FLAG_CC;
2073 ccw->cmd_code = cmd;
2074 ccw->count = len_to_track_end;
2075 ccw->cda = (__u32)(addr_t)idaws;
2076 ccw->flags = CCW_FLAG_IDA;
2077 ccw++;
2078 recid += count;
2079 new_track = 0;
52db45c3
SW		 2080 /* first idaw for a ccw may start anywhere */
2081 if (!idaw_dst)
2082 idaw_dst = dst;
f3eb5384 2083 }
52db45c3
SW		 2084 /* If we start a new idaw, we must make sure that it
2085 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 2086 * If we continue an idaw, we must make sure that the
2087 * current segment begins where the so far accumulated
2088 * idaw ends
2089 */
52db45c3
SW		 2090 if (!idaw_dst) {
2091 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2092 dasd_sfree_request(cqr, startdev);
2093 return ERR_PTR(-ERANGE);
2094 } else
2095 idaw_dst = dst;
2096 }
f3eb5384
SW		 2097 if ((idaw_dst + idaw_len) != dst) {
2098 dasd_sfree_request(cqr, startdev);
2099 return ERR_PTR(-ERANGE);
2100 }
2101 part_len = min(seg_len, len_to_track_end);
2102 seg_len -= part_len;
2103 dst += part_len;
2104 idaw_len += part_len;
2105 len_to_track_end -= part_len;
2106 /* collected memory area ends on an IDA_BLOCK border,
2107 * -> create an idaw
2108 * idal_create_words will handle cases where idaw_len
2109 * is larger then IDA_BLOCK_SIZE
2110 */
2111 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2112 end_idaw = 1;
2113 /* We also need to end the idaw at track end */
2114 if (!len_to_track_end) {
2115 new_track = 1;
2116 end_idaw = 1;
2117 }
2118 if (end_idaw) {
2119 idaws = idal_create_words(idaws, idaw_dst,
2120 idaw_len);
2121 idaw_dst = 0;
2122 idaw_len = 0;
2123 end_idaw = 0;
2124 }
2125 }
2126 }
2127
2128 if (blk_noretry_request(req) ||
2129 block->base->features & DASD_FEATURE_FAILFAST)
2130 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2131 cqr->startdev = startdev;
2132 cqr->memdev = startdev;
2133 cqr->block = block;
2134 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2135 cqr->lpm = private->path_data.ppm;
2136 cqr->retries = 256;
2137 cqr->buildclk = get_clock();
2138 cqr->status = DASD_CQR_FILLED;
2139 return cqr;
2140}
2141
2142static int prepare_itcw(struct itcw *itcw,
2143 unsigned int trk, unsigned int totrk, int cmd,
2144 struct dasd_device *basedev,
2145 struct dasd_device *startdev,
2146 unsigned int rec_on_trk, int count,
2147 unsigned int blksize,
2148 unsigned int total_data_size,
2149 unsigned int tlf,
2150 unsigned int blk_per_trk)
2151{
2152 struct PFX_eckd_data pfxdata;
2153 struct dasd_eckd_private *basepriv, *startpriv;
2154 struct DE_eckd_data *dedata;
2155 struct LRE_eckd_data *lredata;
2156 struct dcw *dcw;
2157
2158 u32 begcyl, endcyl;
2159 u16 heads, beghead, endhead;
2160 u8 pfx_cmd;
2161
2162 int rc = 0;
2163 int sector = 0;
2164 int dn, d;
2165
2166
2167 /* setup prefix data */
2168 basepriv = (struct dasd_eckd_private *) basedev->private;
2169 startpriv = (struct dasd_eckd_private *) startdev->private;
2170 dedata = &pfxdata.define_extent;
2171 lredata = &pfxdata.locate_record;
2172
2173 memset(&pfxdata, 0, sizeof(pfxdata));
2174 pfxdata.format = 1; /* PFX with LRE */
2175 pfxdata.base_address = basepriv->ned->unit_addr;
2176 pfxdata.base_lss = basepriv->ned->ID;
2177 pfxdata.validity.define_extent = 1;
2178
2179 /* private uid is kept up to date, conf_data may be outdated */
2180 if (startpriv->uid.type != UA_BASE_DEVICE) {
2181 pfxdata.validity.verify_base = 1;
2182 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2183 pfxdata.validity.hyper_pav = 1;
2184 }
2185
2186 switch (cmd) {
2187 case DASD_ECKD_CCW_READ_TRACK_DATA:
2188 dedata->mask.perm = 0x1;
2189 dedata->attributes.operation = basepriv->attrib.operation;
2190 dedata->blk_size = blksize;
2191 dedata->ga_extended |= 0x42;
2192 lredata->operation.orientation = 0x0;
2193 lredata->operation.operation = 0x0C;
2194 lredata->auxiliary.check_bytes = 0x01;
2195 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2196 break;
2197 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2198 dedata->mask.perm = 0x02;
2199 dedata->attributes.operation = basepriv->attrib.operation;
2200 dedata->blk_size = blksize;
2201 rc = check_XRC_on_prefix(&pfxdata, basedev);
2202 dedata->ga_extended |= 0x42;
2203 lredata->operation.orientation = 0x0;
2204 lredata->operation.operation = 0x3F;
2205 lredata->extended_operation = 0x23;
2206 lredata->auxiliary.check_bytes = 0x2;
2207 pfx_cmd = DASD_ECKD_CCW_PFX;
2208 break;
2209 default:
2210 DBF_DEV_EVENT(DBF_ERR, basedev,
2211 "prepare itcw, unknown opcode 0x%x", cmd);
2212 BUG();
2213 break;
2214 }
2215 if (rc)
2216 return rc;
2217
2218 dedata->attributes.mode = 0x3; /* ECKD */
2219
2220 heads = basepriv->rdc_data.trk_per_cyl;
2221 begcyl = trk / heads;
2222 beghead = trk % heads;
2223 endcyl = totrk / heads;
2224 endhead = totrk % heads;
2225
2226 /* check for sequential prestage - enhance cylinder range */
2227 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2228 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2229
2230 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2231 endcyl += basepriv->attrib.nr_cyl;
2232 else
2233 endcyl = (basepriv->real_cyl - 1);
2234 }
2235
2236 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2237 set_ch_t(&dedata->end_ext, endcyl, endhead);
2238
2239 dedata->ep_format = 0x20; /* records per track is valid */
2240 dedata->ep_rec_per_track = blk_per_trk;
2241
2242 if (rec_on_trk) {
2243 switch (basepriv->rdc_data.dev_type) {
2244 case 0x3390:
2245 dn = ceil_quot(blksize + 6, 232);
2246 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2247 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2248 break;
2249 case 0x3380:
2250 d = 7 + ceil_quot(blksize + 12, 32);
2251 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2252 break;
2253 }
2254 }
2255
2256 lredata->auxiliary.length_valid = 1;
2257 lredata->auxiliary.length_scope = 1;
2258 lredata->auxiliary.imbedded_ccw_valid = 1;
2259 lredata->length = tlf;
2260 lredata->imbedded_ccw = cmd;
2261 lredata->count = count;
2262 lredata->sector = sector;
2263 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2264 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2265 lredata->search_arg.head = lredata->seek_addr.head;
2266 lredata->search_arg.record = rec_on_trk;
2267
2268 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2269 &pfxdata, sizeof(pfxdata), total_data_size);
2270
2271 return rc;
2272}
2273
2274static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2275 struct dasd_device *startdev,
2276 struct dasd_block *block,
2277 struct request *req,
2278 sector_t first_rec,
2279 sector_t last_rec,
2280 sector_t first_trk,
2281 sector_t last_trk,
2282 unsigned int first_offs,
2283 unsigned int last_offs,
2284 unsigned int blk_per_trk,
2285 unsigned int blksize)
2286{
2287 struct dasd_eckd_private *private;
2288 struct dasd_ccw_req *cqr;
2289 struct req_iterator iter;
2290 struct bio_vec *bv;
2291 char *dst;
2292 unsigned int trkcount, ctidaw;
2293 unsigned char cmd;
2294 struct dasd_device *basedev;
2295 unsigned int tlf;
2296 struct itcw *itcw;
2297 struct tidaw *last_tidaw = NULL;
2298 int itcw_op;
2299 size_t itcw_size;
2300
2301 basedev = block->base;
2302 private = (struct dasd_eckd_private *) basedev->private;
2303 if (rq_data_dir(req) == READ) {
2304 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2305 itcw_op = ITCW_OP_READ;
2306 } else if (rq_data_dir(req) == WRITE) {
2307 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2308 itcw_op = ITCW_OP_WRITE;
2309 } else
2310 return ERR_PTR(-EINVAL);
2311
2312 /* trackbased I/O needs address all memory via TIDAWs,
2313 * not just for 64 bit addresses. This allows us to map
2314 * each segment directly to one tidaw.
2315 */
2316 trkcount = last_trk - first_trk + 1;
2317 ctidaw = 0;
2318 rq_for_each_segment(bv, req, iter) {
2319 ++ctidaw;
2320 }
2321
2322 /* Allocate the ccw request. */
2323 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 2324 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 2325 if (IS_ERR(cqr))
2326 return cqr;
2327
2328 cqr->cpmode = 1;
2329 cqr->startdev = startdev;
2330 cqr->memdev = startdev;
2331 cqr->block = block;
2332 cqr->expires = 100*HZ;
2333 cqr->buildclk = get_clock();
2334 cqr->status = DASD_CQR_FILLED;
2335 cqr->retries = 10;
2336
2337 /* transfer length factor: how many bytes to read from the last track */
2338 if (first_trk == last_trk)
2339 tlf = last_offs - first_offs + 1;
2340 else
2341 tlf = last_offs + 1;
2342 tlf *= blksize;
2343
2344 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2345 cqr->cpaddr = itcw_get_tcw(itcw);
2346
2347 if (prepare_itcw(itcw, first_trk, last_trk,
2348 cmd, basedev, startdev,
2349 first_offs + 1,
2350 trkcount, blksize,
2351 (last_rec - first_rec + 1) * blksize,
2352 tlf, blk_per_trk) == -EAGAIN) {
2353 /* Clock not in sync and XRC is enabled.
2354 * Try again later.
2355 */
2356 dasd_sfree_request(cqr, startdev);
2357 return ERR_PTR(-EAGAIN);
2358 }
2359
2360 /*
2361 * A tidaw can address 4k of memory, but must not cross page boundaries
2362 * We can let the block layer handle this by setting
2363 * blk_queue_segment_boundary to page boundaries and
2364 * blk_max_segment_size to page size when setting up the request queue.
2365 */
2366 rq_for_each_segment(bv, req, iter) {
2367 dst = page_address(bv->bv_page) + bv->bv_offset;
2368 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2369 if (IS_ERR(last_tidaw))
2370 return (struct dasd_ccw_req *)last_tidaw;
2371 }
2372
2373 last_tidaw->flags |= 0x80;
2374 itcw_finalize(itcw);
2375
2376 if (blk_noretry_request(req) ||
2377 block->base->features & DASD_FEATURE_FAILFAST)
2378 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2379 cqr->startdev = startdev;
2380 cqr->memdev = startdev;
2381 cqr->block = block;
2382 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2383 cqr->lpm = private->path_data.ppm;
2384 cqr->retries = 256;
2385 cqr->buildclk = get_clock();
2386 cqr->status = DASD_CQR_FILLED;
2387 return cqr;
2388}
2389
2390static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2391 struct dasd_block *block,
2392 struct request *req)
2393{
2394 int tpm, cmdrtd, cmdwtd;
2395 int use_prefix;
45b44d76 2396#if defined(CONFIG_64BIT)
f3eb5384 2397 int fcx_in_css, fcx_in_gneq, fcx_in_features;
45b44d76
SW		 2398#endif
2399 struct dasd_eckd_private *private;
f3eb5384
SW		 2400 struct dasd_device *basedev;
2401 sector_t first_rec, last_rec;
2402 sector_t first_trk, last_trk;
2403 unsigned int first_offs, last_offs;
2404 unsigned int blk_per_trk, blksize;
2405 int cdlspecial;
2406 struct dasd_ccw_req *cqr;
2407
2408 basedev = block->base;
2409 private = (struct dasd_eckd_private *) basedev->private;
2410
2411 /* Calculate number of blocks/records per track. */
2412 blksize = block->bp_block;
2413 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 2414 if (blk_per_trk == 0)
2415 return ERR_PTR(-EINVAL);
f3eb5384 2416 /* Calculate record id of first and last block. */
83096ebf 2417 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 2418 first_offs = sector_div(first_trk, blk_per_trk);
2419 last_rec = last_trk =
83096ebf 2420 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 2421 last_offs = sector_div(last_trk, blk_per_trk);
2422 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2423
45b44d76
SW		 2424 /* is transport mode supported? */
2425#if defined(CONFIG_64BIT)
f3eb5384
SW		 2426 fcx_in_css = css_general_characteristics.fcx;
2427 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2428 fcx_in_features = private->features.feature[40] & 0x80;
2429 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
45b44d76
SW		 2430#else
2431 tpm = 0;
2432#endif
f3eb5384
SW		 2433
2434 /* is read track data and write track data in command mode supported? */
2435 cmdrtd = private->features.feature[9] & 0x20;
2436 cmdwtd = private->features.feature[12] & 0x40;
2437 use_prefix = private->features.feature[8] & 0x01;
2438
2439 cqr = NULL;
2440 if (cdlspecial || dasd_page_cache) {
2441 /* do nothing, just fall through to the cmd mode single case */
2442 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2443 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2444 first_rec, last_rec,
2445 first_trk, last_trk,
2446 first_offs, last_offs,
2447 blk_per_trk, blksize);
2448 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2449 cqr = NULL;
2450 } else if (use_prefix &&
2451 (((rq_data_dir(req) == READ) && cmdrtd) ||
2452 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2453 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2454 first_rec, last_rec,
2455 first_trk, last_trk,
2456 first_offs, last_offs,
2457 blk_per_trk, blksize);
2458 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2459 cqr = NULL;
2460 }
2461 if (!cqr)
2462 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2463 first_rec, last_rec,
2464 first_trk, last_trk,
2465 first_offs, last_offs,
2466 blk_per_trk, blksize);
2467 return cqr;
2468}
2469
1da177e4
LT		 2470static int
2471dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2472{
2473 struct dasd_eckd_private *private;
2474 struct ccw1 *ccw;
5705f702 2475 struct req_iterator iter;
1da177e4
LT		 2476 struct bio_vec *bv;
2477 char *dst, *cda;
2478 unsigned int blksize, blk_per_trk, off;
2479 sector_t recid;
5705f702 2480 int status;
1da177e4
LT		 2481
2482 if (!dasd_page_cache)
2483 goto out;
8e09f215
SW		 2484 private = (struct dasd_eckd_private *) cqr->block->base->private;
2485 blksize = cqr->block->bp_block;
1da177e4 2486 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 2487 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 2488 ccw = cqr->cpaddr;
2489 /* Skip over define extent & locate record. */
2490 ccw++;
2491 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2492 ccw++;
5705f702 2493 rq_for_each_segment(bv, req, iter) {
1da177e4
LT		 2494 dst = page_address(bv->bv_page) + bv->bv_offset;
2495 for (off = 0; off < bv->bv_len; off += blksize) {
2496 /* Skip locate record. */
2497 if (private->uses_cdl && recid <= 2*blk_per_trk)
2498 ccw++;
2499 if (dst) {
2500 if (ccw->flags & CCW_FLAG_IDA)
2501 cda = *((char **)((addr_t) ccw->cda));
2502 else
2503 cda = (char *)((addr_t) ccw->cda);
2504 if (dst != cda) {
2505 if (rq_data_dir(req) == READ)
2506 memcpy(dst, cda, bv->bv_len);
2507 kmem_cache_free(dasd_page_cache,
2508 (void *)((addr_t)cda & PAGE_MASK));
2509 }
2510 dst = NULL;
2511 }
2512 ccw++;
2513 recid++;
2514 }
2515 }
2516out:
2517 status = cqr->status == DASD_CQR_DONE;
8e09f215 2518 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2519 return status;
2520}
2521
8e09f215 2522/*
f3eb5384 2523 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 2524 *
2525 * Note that this is not enough to restart the cqr!
2526 * Either reset cqr->startdev as well (summary unit check handling)
2527 * or restart via separate cqr (as in ERP handling).
2528 */
2529void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2530{
2531 struct ccw1 *ccw;
2532 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 2533 struct tcw *tcw;
2534 struct tccb *tccb;
2535 struct dcw *dcw;
2536
2537 if (cqr->cpmode == 1) {
2538 tcw = cqr->cpaddr;
2539 tccb = tcw_get_tccb(tcw);
2540 dcw = (struct dcw *)&tccb->tca[0];
2541 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 2542 pfxdata->validity.verify_base = 0;
2543 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 2544 } else {
2545 ccw = cqr->cpaddr;
2546 pfxdata = cqr->data;
2547 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2548 pfxdata->validity.verify_base = 0;
2549 pfxdata->validity.hyper_pav = 0;
2550 }
8e09f215
SW		 2551 }
2552}
2553
2554#define DASD_ECKD_CHANQ_MAX_SIZE 4
2555
2556static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2557 struct dasd_block *block,
2558 struct request *req)
2559{
2560 struct dasd_eckd_private *private;
2561 struct dasd_device *startdev;
2562 unsigned long flags;
2563 struct dasd_ccw_req *cqr;
2564
2565 startdev = dasd_alias_get_start_dev(base);
2566 if (!startdev)
2567 startdev = base;
2568 private = (struct dasd_eckd_private *) startdev->private;
2569 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2570 return ERR_PTR(-EBUSY);
2571
2572 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2573 private->count++;
2574 cqr = dasd_eckd_build_cp(startdev, block, req);
2575 if (IS_ERR(cqr))
2576 private->count--;
2577 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2578 return cqr;
2579}
2580
2581static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2582 struct request *req)
2583{
2584 struct dasd_eckd_private *private;
2585 unsigned long flags;
2586
2587 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2588 private = (struct dasd_eckd_private *) cqr->memdev->private;
2589 private->count--;
2590 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2591 return dasd_eckd_free_cp(cqr, req);
2592}
2593
1da177e4
LT		 2594static int
2595dasd_eckd_fill_info(struct dasd_device * device,
2596 struct dasd_information2_t * info)
2597{
2598 struct dasd_eckd_private *private;
2599
2600 private = (struct dasd_eckd_private *) device->private;
2601 info->label_block = 2;
2602 info->FBA_layout = private->uses_cdl ? 0 : 1;
2603 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2604 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2605 memcpy(info->characteristics, &private->rdc_data,
2606 sizeof(struct dasd_eckd_characteristics));
4abb08c2
SW		 2607 info->confdata_size = min((unsigned long)private->conf_len,
2608 sizeof(info->configuration_data));
2609 memcpy(info->configuration_data, private->conf_data,
2610 info->confdata_size);
1da177e4
LT		 2611 return 0;
2612}
2613
2614/*
2615 * SECTION: ioctl functions for eckd devices.
2616 */
2617
2618/*
2619 * Release device ioctl.
138c014d 2620 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 2621 * (see dasd_eckd_reserve) device.
2622 */
2623static int
1107ccfb 2624dasd_eckd_release(struct dasd_device *device)
1da177e4 2625{
1da177e4
LT		 2626 struct dasd_ccw_req *cqr;
2627 int rc;
f3eb5384 2628 struct ccw1 *ccw;
1da177e4
LT		 2629
2630 if (!capable(CAP_SYS_ADMIN))
2631 return -EACCES;
2632
68b781fe 2633 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 2634 if (IS_ERR(cqr)) {
fc19f381 2635 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2636 "Could not allocate initialization request");
2637 return PTR_ERR(cqr);
2638 }
f3eb5384
SW		 2639 ccw = cqr->cpaddr;
2640 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2641 ccw->flags |= CCW_FLAG_SLI;
2642 ccw->count = 32;
2643 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2644 cqr->startdev = device;
2645 cqr->memdev = device;
1da177e4 2646 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2647 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2648 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2649 cqr->expires = 2 * HZ;
2650 cqr->buildclk = get_clock();
2651 cqr->status = DASD_CQR_FILLED;
2652
2653 rc = dasd_sleep_on_immediatly(cqr);
2654
8e09f215 2655 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2656 return rc;
2657}
2658
2659/*
2660 * Reserve device ioctl.
2661 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 2662 * 'timeout the request'. This leads to a terminate IO if
2663 * the interrupt is outstanding for a certain time.
1da177e4
LT		 2664 */
2665static int
1107ccfb 2666dasd_eckd_reserve(struct dasd_device *device)
1da177e4 2667{
1da177e4
LT		 2668 struct dasd_ccw_req *cqr;
2669 int rc;
f3eb5384 2670 struct ccw1 *ccw;
1da177e4
LT		 2671
2672 if (!capable(CAP_SYS_ADMIN))
2673 return -EACCES;
2674
68b781fe 2675 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 2676 if (IS_ERR(cqr)) {
fc19f381 2677 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2678 "Could not allocate initialization request");
2679 return PTR_ERR(cqr);
2680 }
f3eb5384
SW		 2681 ccw = cqr->cpaddr;
2682 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2683 ccw->flags |= CCW_FLAG_SLI;
2684 ccw->count = 32;
2685 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2686 cqr->startdev = device;
2687 cqr->memdev = device;
1da177e4 2688 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2689 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2690 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2691 cqr->expires = 2 * HZ;
2692 cqr->buildclk = get_clock();
2693 cqr->status = DASD_CQR_FILLED;
2694
2695 rc = dasd_sleep_on_immediatly(cqr);
2696
8e09f215 2697 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2698 return rc;
2699}
2700
2701/*
2702 * Steal lock ioctl - unconditional reserve device.
138c014d 2703 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 2704 * (unconditional reserve)
2705 */
2706static int
1107ccfb 2707dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 2708{
1da177e4
LT		 2709 struct dasd_ccw_req *cqr;
2710 int rc;
f3eb5384 2711 struct ccw1 *ccw;
1da177e4
LT		 2712
2713 if (!capable(CAP_SYS_ADMIN))
2714 return -EACCES;
2715
68b781fe 2716 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 2717 if (IS_ERR(cqr)) {
fc19f381 2718 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2719 "Could not allocate initialization request");
2720 return PTR_ERR(cqr);
2721 }
f3eb5384
SW		 2722 ccw = cqr->cpaddr;
2723 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2724 ccw->flags |= CCW_FLAG_SLI;
2725 ccw->count = 32;
2726 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 2727 cqr->startdev = device;
2728 cqr->memdev = device;
1da177e4 2729 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 2730 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 2731 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4
LT		 2732 cqr->expires = 2 * HZ;
2733 cqr->buildclk = get_clock();
2734 cqr->status = DASD_CQR_FILLED;
2735
2736 rc = dasd_sleep_on_immediatly(cqr);
2737
8e09f215 2738 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2739 return rc;
2740}
2741
2742/*
2743 * Read performance statistics
2744 */
2745static int
1107ccfb 2746dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 2747{
1da177e4
LT		 2748 struct dasd_psf_prssd_data *prssdp;
2749 struct dasd_rssd_perf_stats_t *stats;
2750 struct dasd_ccw_req *cqr;
2751 struct ccw1 *ccw;
2752 int rc;
2753
68b781fe 2754 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 2755 (sizeof(struct dasd_psf_prssd_data) +
2756 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 2757 device);
2758 if (IS_ERR(cqr)) {
fc19f381 2759 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 2760 "Could not allocate initialization request");
2761 return PTR_ERR(cqr);
2762 }
8e09f215
SW		 2763 cqr->startdev = device;
2764 cqr->memdev = device;
1da177e4 2765 cqr->retries = 0;
eb6e199b 2766 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 2767 cqr->expires = 10 * HZ;
2768
2769 /* Prepare for Read Subsystem Data */
2770 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 2771 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 2772 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 2773 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 2774 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2775
2776 ccw = cqr->cpaddr;
2777 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 2778 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 2779 ccw->flags |= CCW_FLAG_CC;
2780 ccw->cda = (__u32)(addr_t) prssdp;
2781
2782 /* Read Subsystem Data - Performance Statistics */
2783 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 2784 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 2785
2786 ccw++;
2787 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 2788 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 2789 ccw->cda = (__u32)(addr_t) stats;
2790
2791 cqr->buildclk = get_clock();
2792 cqr->status = DASD_CQR_FILLED;
2793 rc = dasd_sleep_on(cqr);
2794 if (rc == 0) {
1da177e4
LT		 2795 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2796 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 2797 if (copy_to_user(argp, stats,
2798 sizeof(struct dasd_rssd_perf_stats_t)))
2799 rc = -EFAULT;
1da177e4 2800 }
8e09f215 2801 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 2802 return rc;
2803}
2804
2805/*
2806 * Get attributes (cache operations)
2807 * Returnes the cache attributes used in Define Extend (DE).
2808 */
2809static int
1107ccfb 2810dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 2811{
1107ccfb
CH		 2812 struct dasd_eckd_private *private =
2813 (struct dasd_eckd_private *)device->private;
2814 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 2815 int rc;
2816
2817 if (!capable(CAP_SYS_ADMIN))
2818 return -EACCES;
1107ccfb 2819 if (!argp)
1da177e4
LT		 2820 return -EINVAL;
2821
1107ccfb
CH		 2822 rc = 0;
2823 if (copy_to_user(argp, (long *) &attrib,
8e09f215 2824 sizeof(struct attrib_data_t)))
1107ccfb 2825 rc = -EFAULT;
1da177e4
LT		 2826
2827 return rc;
2828}
2829
2830/*
2831 * Set attributes (cache operations)
2832 * Stores the attributes for cache operation to be used in Define Extend (DE).
2833 */
2834static int
1107ccfb 2835dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 2836{
1107ccfb
CH		 2837 struct dasd_eckd_private *private =
2838 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 2839 struct attrib_data_t attrib;
2840
2841 if (!capable(CAP_SYS_ADMIN))
2842 return -EACCES;
1107ccfb 2843 if (!argp)
1da177e4
LT		 2844 return -EINVAL;
2845
1107ccfb 2846 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 2847 return -EFAULT;
1da177e4
LT		 2848 private->attrib = attrib;
2849
fc19f381
SH		 2850 dev_info(&device->cdev->dev,
2851 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2852 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 2853 return 0;
2854}
2855
ab1d848f
NH		 2856/*
2857 * Issue syscall I/O to EMC Symmetrix array.
2858 * CCWs are PSF and RSSD
2859 */
2860static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2861{
2862 struct dasd_symmio_parms usrparm;
2863 char *psf_data, *rssd_result;
2864 struct dasd_ccw_req *cqr;
2865 struct ccw1 *ccw;
52898025 2866 char psf0, psf1;
ab1d848f
NH		 2867 int rc;
2868
52898025
NH		 2869 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
2870 return -EACCES;
2871 psf0 = psf1 = 0;
2872
ab1d848f
NH		 2873 /* Copy parms from caller */
2874 rc = -EFAULT;
2875 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2876 goto out;
f8b06859
HC		 2877 if (is_compat_task() || sizeof(long) == 4) {
2878 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 2879 rc = -EINVAL;
f8b06859
HC		 2880 if ((usrparm.psf_data >> 32) != 0)
2881 goto out;
2882 if ((usrparm.rssd_result >> 32) != 0)
2883 goto out;
2884 usrparm.psf_data &= 0x7fffffffULL;
2885 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 2886 }
ab1d848f
NH		 2887 /* alloc I/O data area */
2888 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2889 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2890 if (!psf_data || !rssd_result) {
2891 rc = -ENOMEM;
2892 goto out_free;
2893 }
2894
2895 /* get syscall header from user space */
2896 rc = -EFAULT;
2897 if (copy_from_user(psf_data,
2898 (void __user *)(unsigned long) usrparm.psf_data,
2899 usrparm.psf_data_len))
2900 goto out_free;
52898025
NH		 2901 psf0 = psf_data[0];
2902 psf1 = psf_data[1];
ab1d848f
NH		 2903
2904 /* setup CCWs for PSF + RSSD */
68b781fe 2905 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 2906 if (IS_ERR(cqr)) {
fc19f381 2907 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 2908 "Could not allocate initialization request");
2909 rc = PTR_ERR(cqr);
2910 goto out_free;
2911 }
2912
2913 cqr->startdev = device;
2914 cqr->memdev = device;
2915 cqr->retries = 3;
2916 cqr->expires = 10 * HZ;
2917 cqr->buildclk = get_clock();
2918 cqr->status = DASD_CQR_FILLED;
2919
2920 /* Build the ccws */
2921 ccw = cqr->cpaddr;
2922
2923 /* PSF ccw */
2924 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2925 ccw->count = usrparm.psf_data_len;
2926 ccw->flags |= CCW_FLAG_CC;
2927 ccw->cda = (__u32)(addr_t) psf_data;
2928
2929 ccw++;
2930
2931 /* RSSD ccw */
2932 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2933 ccw->count = usrparm.rssd_result_len;
2934 ccw->flags = CCW_FLAG_SLI ;
2935 ccw->cda = (__u32)(addr_t) rssd_result;
2936
2937 rc = dasd_sleep_on(cqr);
2938 if (rc)
2939 goto out_sfree;
2940
2941 rc = -EFAULT;
2942 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2943 rssd_result, usrparm.rssd_result_len))
2944 goto out_sfree;
2945 rc = 0;
2946
2947out_sfree:
2948 dasd_sfree_request(cqr, cqr->memdev);
2949out_free:
2950 kfree(rssd_result);
2951 kfree(psf_data);
2952out:
52898025
NH		 2953 DBF_DEV_EVENT(DBF_WARNING, device,
2954 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
2955 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 2956 return rc;
2957}
2958
1107ccfb 2959static int
8e09f215 2960dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 2961{
8e09f215
SW		 2962 struct dasd_device *device = block->base;
2963
1107ccfb
CH		 2964 switch (cmd) {
2965 case BIODASDGATTR:
2966 return dasd_eckd_get_attrib(device, argp);
2967 case BIODASDSATTR:
2968 return dasd_eckd_set_attrib(device, argp);
2969 case BIODASDPSRD:
2970 return dasd_eckd_performance(device, argp);
2971 case BIODASDRLSE:
2972 return dasd_eckd_release(device);
2973 case BIODASDRSRV:
2974 return dasd_eckd_reserve(device);
2975 case BIODASDSLCK:
2976 return dasd_eckd_steal_lock(device);
ab1d848f
NH		 2977 case BIODASDSYMMIO:
2978 return dasd_symm_io(device, argp);
1107ccfb
CH		 2979 default:
2980 return -ENOIOCTLCMD;
2981 }
2982}
2983
445b5b49
HH		 2984/*
2985 * Dump the range of CCWs into 'page' buffer
2986 * and return number of printed chars.
2987 */
4d284cac 2988static int
445b5b49
HH		 2989dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
2990{
2991 int len, count;
2992 char *datap;
2993
2994 len = 0;
2995 while (from <= to) {
2996 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2997 " CCW %p: %08X %08X DAT:",
2998 from, ((int *) from)[0], ((int *) from)[1]);
2999
3000 /* get pointer to data (consider IDALs) */
3001 if (from->flags & CCW_FLAG_IDA)
3002 datap = (char *) *((addr_t *) (addr_t) from->cda);
3003 else
3004 datap = (char *) ((addr_t) from->cda);
3005
3006 /* dump data (max 32 bytes) */
3007 for (count = 0; count < from->count && count < 32; count++) {
3008 if (count % 8 == 0) len += sprintf(page + len, " ");
3009 if (count % 4 == 0) len += sprintf(page + len, " ");
3010 len += sprintf(page + len, "%02x", datap[count]);
3011 }
3012 len += sprintf(page + len, "\n");
3013 from++;
3014 }
3015 return len;
3016}
3017
fc19f381 3018static void
aeec92ca
SH		 3019dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
3020 char *reason)
fc19f381
SH		 3021{
3022 u64 *sense;
aeec92ca
SH		 3023
3024 sense = (u64 *) dasd_get_sense(irb);
fc19f381 3025 if (sense) {
aeec92ca
SH		 3026 DBF_DEV_EVENT(DBF_EMERG, device,
3027 "%s: %s %02x%02x%02x %016llx %016llx %016llx "
3028 "%016llx", reason,
3029 scsw_is_tm(&irb->scsw) ? "t" : "c",
3030 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
3031 scsw_dstat(&irb->scsw), sense[0], sense[1],
3032 sense[2], sense[3]);
fc19f381
SH		 3033 } else {
3034 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
3035 "SORRY - NO VALID SENSE AVAILABLE\n");
3036 }
3037}
3038
1da177e4
LT		 3039/*
3040 * Print sense data and related channel program.
3041 * Parts are printed because printk buffer is only 1024 bytes.
3042 */
f3eb5384 3043static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 3044 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 3045{
3046 char *page;
445b5b49
HH		 3047 struct ccw1 *first, *last, *fail, *from, *to;
3048 int len, sl, sct;
1da177e4
LT		 3049
3050 page = (char *) get_zeroed_page(GFP_ATOMIC);
3051 if (page == NULL) {
fc19f381
SH		 3052 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3053 "No memory to dump sense data\n");
1da177e4
LT		 3054 return;
3055 }
445b5b49
HH		 3056 /* dump the sense data */
3057 len = sprintf(page, KERN_ERR PRINTK_HEADER
1da177e4 3058 " I/O status report for device %s:\n",
2a0217d5 3059 dev_name(&device->cdev->dev));
1da177e4 3060 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
6cc7f168
SW		 3061 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
3062 req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
294001a8 3063 scsw_cc(&irb->scsw), req ? req->intrc : 0);
1da177e4
LT		 3064 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3065 " device %s: Failing CCW: %p\n",
2a0217d5 3066 dev_name(&device->cdev->dev),
23d805b6 3067 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 3068 if (irb->esw.esw0.erw.cons) {
3069 for (sl = 0; sl < 4; sl++) {
3070 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3071 " Sense(hex) %2d-%2d:",
3072 (8 * sl), ((8 * sl) + 7));
3073
3074 for (sct = 0; sct < 8; sct++) {
3075 len += sprintf(page + len, " %02x",
3076 irb->ecw[8 * sl + sct]);
3077 }
3078 len += sprintf(page + len, "\n");
3079 }
3080
3081 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3082 /* 24 Byte Sense Data */
445b5b49
HH		 3083 sprintf(page + len, KERN_ERR PRINTK_HEADER
3084 " 24 Byte: %x MSG %x, "
3085 "%s MSGb to SYSOP\n",
3086 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3087 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 3088 } else {
3089 /* 32 Byte Sense Data */
445b5b49
HH		 3090 sprintf(page + len, KERN_ERR PRINTK_HEADER
3091 " 32 Byte: Format: %x "
3092 "Exception class %x\n",
3093 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 3094 }
3095 } else {
445b5b49
HH		 3096 sprintf(page + len, KERN_ERR PRINTK_HEADER
3097 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 3098 }
445b5b49
HH		 3099 printk("%s", page);
3100
8e09f215
SW		 3101 if (req) {
3102 /* req == NULL for unsolicited interrupts */
3103 /* dump the Channel Program (max 140 Bytes per line) */
3104 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3105 first = req->cpaddr;
3106 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3107 to = min(first + 6, last);
3108 len = sprintf(page, KERN_ERR PRINTK_HEADER
3109 " Related CP in req: %p\n", req);
3110 dasd_eckd_dump_ccw_range(first, to, page + len);
3111 printk("%s", page);
1da177e4 3112
8e09f215
SW		 3113 /* print failing CCW area (maximum 4) */
3114 /* scsw->cda is either valid or zero */
3115 len = 0;
3116 from = ++to;
23d805b6
PO		 3117 fail = (struct ccw1 *)(addr_t)
3118 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 3119 if (from < fail - 2) {
3120 from = fail - 2; /* there is a gap - print header */
3121 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3122 }
3123 to = min(fail + 1, last);
3124 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3125
3126 /* print last CCWs (maximum 2) */
3127 from = max(from, ++to);
3128 if (from < last - 1) {
3129 from = last - 1; /* there is a gap - print header */
3130 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3131 }
3132 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3133 if (len > 0)
3134 printk("%s", page);
1da177e4 3135 }
1da177e4
LT		 3136 free_page((unsigned long) page);
3137}
3138
f3eb5384
SW		 3139
3140/*
3141 * Print sense data from a tcw.
3142 */
3143static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3144 struct dasd_ccw_req *req, struct irb *irb)
3145{
3146 char *page;
3147 int len, sl, sct, residual;
3148
3149 struct tsb *tsb;
3150 u8 *sense;
3151
3152
3153 page = (char *) get_zeroed_page(GFP_ATOMIC);
3154 if (page == NULL) {
fc19f381 3155 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 3156 "No memory to dump sense data");
3157 return;
3158 }
3159 /* dump the sense data */
3160 len = sprintf(page, KERN_ERR PRINTK_HEADER
3161 " I/O status report for device %s:\n",
3162 dev_name(&device->cdev->dev));
3163 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
6cc7f168 3164 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
f3eb5384
SW		 3165 "fcxs: 0x%02X schxs: 0x%02X\n", req,
3166 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
6cc7f168 3167 scsw_cc(&irb->scsw), req->intrc,
f3eb5384
SW		 3168 irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3169 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3170 " device %s: Failing TCW: %p\n",
3171 dev_name(&device->cdev->dev),
3172 (void *) (addr_t) irb->scsw.tm.tcw);
3173
3174 tsb = NULL;
3175 sense = NULL;
b8fde722 3176 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01))
f3eb5384
SW		 3177 tsb = tcw_get_tsb(
3178 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3179
b8fde722 3180 if (tsb) {
f3eb5384
SW		 3181 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3182 " tsb->length %d\n", tsb->length);
3183 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3184 " tsb->flags %x\n", tsb->flags);
3185 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3186 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3187 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3188 " tsb->count %d\n", tsb->count);
3189 residual = tsb->count - 28;
3190 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3191 " residual %d\n", residual);
3192
3193 switch (tsb->flags & 0x07) {
3194 case 1: /* tsa_iostat */
3195 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3196 " tsb->tsa.iostat.dev_time %d\n",
3197 tsb->tsa.iostat.dev_time);
3198 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3199 " tsb->tsa.iostat.def_time %d\n",
3200 tsb->tsa.iostat.def_time);
3201 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3202 " tsb->tsa.iostat.queue_time %d\n",
3203 tsb->tsa.iostat.queue_time);
3204 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3205 " tsb->tsa.iostat.dev_busy_time %d\n",
3206 tsb->tsa.iostat.dev_busy_time);
3207 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3208 " tsb->tsa.iostat.dev_act_time %d\n",
3209 tsb->tsa.iostat.dev_act_time);
3210 sense = tsb->tsa.iostat.sense;
3211 break;
3212 case 2: /* ts_ddpc */
3213 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3214 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3215 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3216 " tsb->tsa.ddpc.rcq: ");
3217 for (sl = 0; sl < 16; sl++) {
3218 for (sct = 0; sct < 8; sct++) {
3219 len += sprintf(page + len, " %02x",
3220 tsb->tsa.ddpc.rcq[sl]);
3221 }
3222 len += sprintf(page + len, "\n");
3223 }
3224 sense = tsb->tsa.ddpc.sense;
3225 break;
3226 case 3: /* tsa_intrg */
3227 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3228 " tsb->tsa.intrg.: not supportet yet \n");
3229 break;
3230 }
3231
3232 if (sense) {
3233 for (sl = 0; sl < 4; sl++) {
3234 len += sprintf(page + len,
3235 KERN_ERR PRINTK_HEADER
3236 " Sense(hex) %2d-%2d:",
3237 (8 * sl), ((8 * sl) + 7));
3238 for (sct = 0; sct < 8; sct++) {
3239 len += sprintf(page + len, " %02x",
3240 sense[8 * sl + sct]);
3241 }
3242 len += sprintf(page + len, "\n");
3243 }
3244
3245 if (sense[27] & DASD_SENSE_BIT_0) {
3246 /* 24 Byte Sense Data */
3247 sprintf(page + len, KERN_ERR PRINTK_HEADER
3248 " 24 Byte: %x MSG %x, "
3249 "%s MSGb to SYSOP\n",
3250 sense[7] >> 4, sense[7] & 0x0f,
3251 sense[1] & 0x10 ? "" : "no");
3252 } else {
3253 /* 32 Byte Sense Data */
3254 sprintf(page + len, KERN_ERR PRINTK_HEADER
3255 " 32 Byte: Format: %x "
3256 "Exception class %x\n",
3257 sense[6] & 0x0f, sense[22] >> 4);
3258 }
3259 } else {
3260 sprintf(page + len, KERN_ERR PRINTK_HEADER
3261 " SORRY - NO VALID SENSE AVAILABLE\n");
3262 }
3263 } else {
3264 sprintf(page + len, KERN_ERR PRINTK_HEADER
3265 " SORRY - NO TSB DATA AVAILABLE\n");
3266 }
3267 printk("%s", page);
3268 free_page((unsigned long) page);
3269}
3270
3271static void dasd_eckd_dump_sense(struct dasd_device *device,
3272 struct dasd_ccw_req *req, struct irb *irb)
3273{
3274 if (req && scsw_is_tm(&req->irb.scsw))
3275 dasd_eckd_dump_sense_tcw(device, req, irb);
3276 else
3277 dasd_eckd_dump_sense_ccw(device, req, irb);
3278}
3279
501183f2 3280static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 3281{
3282 /*
3283 * the device should be disconnected from our LCU structure
3284 * on restore we will reconnect it and reread LCU specific
3285 * information like PAV support that might have changed
3286 */
3287 dasd_alias_remove_device(device);
3288 dasd_alias_disconnect_device_from_lcu(device);
3289
3290 return 0;
3291}
3292
501183f2 3293static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122
SH		 3294{
3295 struct dasd_eckd_private *private;
6fca97a9 3296 struct dasd_eckd_characteristics temp_rdc_data;
d41dd122
SH		 3297 int is_known, rc;
3298 struct dasd_uid temp_uid;
a7602f6c 3299 unsigned long flags;
d41dd122 3300
d41dd122
SH		 3301 private = (struct dasd_eckd_private *) device->private;
3302
3303 /* Read Configuration Data */
3304 rc = dasd_eckd_read_conf(device);
3305 if (rc)
3306 goto out_err;
3307
3308 /* Generate device unique id and register in devmap */
3309 rc = dasd_eckd_generate_uid(device, &private->uid);
3310 dasd_get_uid(device->cdev, &temp_uid);
3311 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 3312 dev_err(&device->cdev->dev, "The UID of the DASD has "
3313 "changed\n");
d41dd122
SH		 3314 if (rc)
3315 goto out_err;
3316 dasd_set_uid(device->cdev, &private->uid);
3317
3318 /* register lcu with alias handling, enable PAV if this is a new lcu */
3319 is_known = dasd_alias_make_device_known_to_lcu(device);
3320 if (is_known < 0)
3321 return is_known;
3322 if (!is_known) {
f4ac1d02
SW		 3323 dasd_eckd_validate_server(device);
3324 dasd_alias_lcu_setup_complete(device);
3325 } else
3326 dasd_alias_wait_for_lcu_setup(device);
3327
3328 /* RE-Read Configuration Data */
3329 rc = dasd_eckd_read_conf(device);
3330 if (rc)
3331 goto out_err;
d41dd122
SH		 3332
3333 /* Read Feature Codes */
68d1e5f0 3334 dasd_eckd_read_features(device);
d41dd122
SH		 3335
3336 /* Read Device Characteristics */
68b781fe 3337 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 3338 &temp_rdc_data, 64);
d41dd122 3339 if (rc) {
b8ed5dd5
SH		 3340 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
3341 "Read device characteristic failed, rc=%d", rc);
d41dd122
SH		 3342 goto out_err;
3343 }
a7602f6c 3344 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 3345 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 3346 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 3347
3348 /* add device to alias management */
3349 dasd_alias_add_device(device);
3350
3351 return 0;
3352
3353out_err:
e6125fba 3354 return -1;
d41dd122
SH		 3355}
3356
501183f2
SH		 3357static int dasd_eckd_reload_device(struct dasd_device *device)
3358{
3359 struct dasd_eckd_private *private;
3360 int rc, old_base;
3361 char uid[60];
3362
3363 private = (struct dasd_eckd_private *) device->private;
3364 old_base = private->uid.base_unit_addr;
3365 /* Read Configuration Data */
3366 rc = dasd_eckd_read_conf(device);
3367 if (rc)
3368 goto out_err;
3369
3370 rc = dasd_eckd_generate_uid(device, &private->uid);
3371 if (rc)
3372 goto out_err;
3373
3374 dasd_set_uid(device->cdev, &private->uid);
3375
3376 /*
3377 * update unit address configuration and
3378 * add device to alias management
3379 */
3380 dasd_alias_update_add_device(device);
3381
3382 if (old_base != private->uid.base_unit_addr) {
3383 if (strlen(private->uid.vduit) > 0)
3384 snprintf(uid, 60, "%s.%s.%04x.%02x.%s",
3385 private->uid.vendor, private->uid.serial,
3386 private->uid.ssid, private->uid.base_unit_addr,
3387 private->uid.vduit);
3388 else
3389 snprintf(uid, 60, "%s.%s.%04x.%02x",
3390 private->uid.vendor, private->uid.serial,
3391 private->uid.ssid,
3392 private->uid.base_unit_addr);
3393
3394 dev_info(&device->cdev->dev,
3395 "An Alias device was reassigned to a new base device "
3396 "with UID: %s\n", uid);
3397 }
3398 return 0;
3399
3400out_err:
3401 return -1;
3402}
3403
d41dd122
SH		 3404static struct ccw_driver dasd_eckd_driver = {
3405 .name = "dasd-eckd",
3406 .owner = THIS_MODULE,
3407 .ids = dasd_eckd_ids,
3408 .probe = dasd_eckd_probe,
3409 .remove = dasd_generic_remove,
3410 .set_offline = dasd_generic_set_offline,
3411 .set_online = dasd_eckd_set_online,
3412 .notify = dasd_generic_notify,
3413 .freeze = dasd_generic_pm_freeze,
3414 .thaw = dasd_generic_restore_device,
3415 .restore = dasd_generic_restore_device,
3416};
f3eb5384 3417
1da177e4
LT		 3418/*
3419 * max_blocks is dependent on the amount of storage that is available
3420 * in the static io buffer for each device. Currently each device has
3421 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3422 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3423 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3424 * addition we have one define extent ccw + 16 bytes of data and one
3425 * locate record ccw + 16 bytes of data. That makes:
3426 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3427 * We want to fit two into the available memory so that we can immediately
3428 * start the next request if one finishes off. That makes 249.5 blocks
3429 * for one request. Give a little safety and the result is 240.
3430 */
3431static struct dasd_discipline dasd_eckd_discipline = {
3432 .owner = THIS_MODULE,
3433 .name = "ECKD",
3434 .ebcname = "ECKD",
3435 .max_blocks = 240,
3436 .check_device = dasd_eckd_check_characteristics,
8e09f215 3437 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 3438 .do_analysis = dasd_eckd_do_analysis,
8e09f215
SW		 3439 .ready_to_online = dasd_eckd_ready_to_online,
3440 .online_to_ready = dasd_eckd_online_to_ready,
1da177e4
LT		 3441 .fill_geometry = dasd_eckd_fill_geometry,
3442 .start_IO = dasd_start_IO,
3443 .term_IO = dasd_term_IO,
8e09f215 3444 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 3445 .format_device = dasd_eckd_format_device,
1da177e4
LT		 3446 .erp_action = dasd_eckd_erp_action,
3447 .erp_postaction = dasd_eckd_erp_postaction,
8e09f215
SW		 3448 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3449 .build_cp = dasd_eckd_build_alias_cp,
3450 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 3451 .dump_sense = dasd_eckd_dump_sense,
fc19f381 3452 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 3453 .fill_info = dasd_eckd_fill_info,
1107ccfb 3454 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 3455 .freeze = dasd_eckd_pm_freeze,
3456 .restore = dasd_eckd_restore_device,
501183f2 3457 .reload = dasd_eckd_reload_device,
1da177e4
LT		 3458};
3459
3460static int __init
3461dasd_eckd_init(void)
3462{
736e6ea0
SO		 3463 int ret;
3464
1da177e4 3465 ASCEBC(dasd_eckd_discipline.ebcname, 4);
736e6ea0
SO		 3466 ret = ccw_driver_register(&dasd_eckd_driver);
3467 if (!ret)
3468 wait_for_device_probe();
3469
3470 return ret;
1da177e4
LT		 3471}
3472
3473static void __exit
3474dasd_eckd_cleanup(void)
3475{
3476 ccw_driver_unregister(&dasd_eckd_driver);
1da177e4
LT		 3477}
3478
3479module_init(dasd_eckd_init);
3480module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)