2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Horst Hummel <Horst.Hummel@de.ibm.com>
5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
8 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/hdreg.h> /* HDIO_GETGEO */
18 #include <linux/bio.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
22 #include <asm/debug.h>
23 #include <asm/idals.h>
24 #include <asm/ebcdic.h>
26 #include <asm/todclk.h>
27 #include <asm/uaccess.h>
29 #include <asm/ccwdev.h>
32 #include "dasd_eckd.h"
36 #endif /* PRINTK_HEADER */
37 #define PRINTK_HEADER "dasd(eckd):"
39 #define ECKD_C0(i) (i->home_bytes)
40 #define ECKD_F(i) (i->formula)
41 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
42 (i->factors.f_0x02.f1))
43 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
44 (i->factors.f_0x02.f2))
45 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
46 (i->factors.f_0x02.f3))
47 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
48 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
49 #define ECKD_F6(i) (i->factor6)
50 #define ECKD_F7(i) (i->factor7)
51 #define ECKD_F8(i) (i->factor8)
53 MODULE_LICENSE("GPL");
55 static struct dasd_discipline dasd_eckd_discipline;
57 /* The ccw bus type uses this table to find devices that it sends to
59 static struct ccw_device_id dasd_eckd_ids[] = {
60 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
61 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
62 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
63 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
64 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
65 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
66 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
67 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
68 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
69 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
70 { /* end of list */ },
73 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
75 static struct ccw_driver dasd_eckd_driver; /* see below */
77 /* initial attempt at a probe function. this can be simplified once
78 * the other detection code is gone */
80 dasd_eckd_probe (struct ccw_device *cdev)
84 /* set ECKD specific ccw-device options */
85 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE);
88 "dasd_eckd_probe: could not set ccw-device options "
89 "for %s\n", dev_name(&cdev->dev));
92 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
97 dasd_eckd_set_online(struct ccw_device *cdev)
99 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
102 static struct ccw_driver dasd_eckd_driver = {
104 .owner = THIS_MODULE,
105 .ids = dasd_eckd_ids,
106 .probe = dasd_eckd_probe,
107 .remove = dasd_generic_remove,
108 .set_offline = dasd_generic_set_offline,
109 .set_online = dasd_eckd_set_online,
110 .notify = dasd_generic_notify,
113 static const int sizes_trk0[] = { 28, 148, 84 };
114 #define LABEL_SIZE 140
116 static inline unsigned int
117 round_up_multiple(unsigned int no, unsigned int mult)
120 return (rem ? no - rem + mult : no);
123 static inline unsigned int
124 ceil_quot(unsigned int d1, unsigned int d2)
126 return (d1 + (d2 - 1)) / d2;
130 recs_per_track(struct dasd_eckd_characteristics * rdc,
131 unsigned int kl, unsigned int dl)
135 switch (rdc->dev_type) {
138 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
139 ceil_quot(dl + 12, 32));
141 return 1499 / (15 + ceil_quot(dl + 12, 32));
143 dn = ceil_quot(dl + 6, 232) + 1;
145 kn = ceil_quot(kl + 6, 232) + 1;
146 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
147 9 + ceil_quot(dl + 6 * dn, 34));
149 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
151 dn = ceil_quot(dl + 6, 232) + 1;
153 kn = ceil_quot(kl + 6, 232) + 1;
154 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
155 ceil_quot(dl + 6 * dn, 34));
157 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
162 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
164 geo->cyl = (__u16) cyl;
165 geo->head = cyl >> 16;
171 check_XRC (struct ccw1 *de_ccw,
172 struct DE_eckd_data *data,
173 struct dasd_device *device)
175 struct dasd_eckd_private *private;
178 private = (struct dasd_eckd_private *) device->private;
179 if (!private->rdc_data.facilities.XRC_supported)
182 /* switch on System Time Stamp - needed for XRC Support */
183 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
184 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
186 rc = get_sync_clock(&data->ep_sys_time);
187 /* Ignore return code if sync clock is switched off. */
188 if (rc == -ENOSYS || rc == -EACCES)
191 de_ccw->count = sizeof(struct DE_eckd_data);
192 de_ccw->flags |= CCW_FLAG_SLI;
197 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
198 unsigned int totrk, int cmd, struct dasd_device *device)
200 struct dasd_eckd_private *private;
202 u16 heads, beghead, endhead;
205 private = (struct dasd_eckd_private *) device->private;
207 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
210 ccw->cda = (__u32) __pa(data);
212 memset(data, 0, sizeof(struct DE_eckd_data));
214 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
215 case DASD_ECKD_CCW_READ_RECORD_ZERO:
216 case DASD_ECKD_CCW_READ:
217 case DASD_ECKD_CCW_READ_MT:
218 case DASD_ECKD_CCW_READ_CKD:
219 case DASD_ECKD_CCW_READ_CKD_MT:
220 case DASD_ECKD_CCW_READ_KD:
221 case DASD_ECKD_CCW_READ_KD_MT:
222 case DASD_ECKD_CCW_READ_COUNT:
223 data->mask.perm = 0x1;
224 data->attributes.operation = private->attrib.operation;
226 case DASD_ECKD_CCW_WRITE:
227 case DASD_ECKD_CCW_WRITE_MT:
228 case DASD_ECKD_CCW_WRITE_KD:
229 case DASD_ECKD_CCW_WRITE_KD_MT:
230 data->mask.perm = 0x02;
231 data->attributes.operation = private->attrib.operation;
232 rc = check_XRC (ccw, data, device);
234 case DASD_ECKD_CCW_WRITE_CKD:
235 case DASD_ECKD_CCW_WRITE_CKD_MT:
236 data->attributes.operation = DASD_BYPASS_CACHE;
237 rc = check_XRC (ccw, data, device);
239 case DASD_ECKD_CCW_ERASE:
240 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
241 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
242 data->mask.perm = 0x3;
243 data->mask.auth = 0x1;
244 data->attributes.operation = DASD_BYPASS_CACHE;
245 rc = check_XRC (ccw, data, device);
248 DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
252 data->attributes.mode = 0x3; /* ECKD */
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 */
260 heads = private->rdc_data.trk_per_cyl;
261 begcyl = trk / heads;
262 beghead = trk % heads;
263 endcyl = totrk / heads;
264 endhead = totrk % heads;
266 /* check for sequential prestage - enhance cylinder range */
267 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
268 data->attributes.operation == DASD_SEQ_ACCESS) {
270 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
271 endcyl += private->attrib.nr_cyl;
273 endcyl = (private->real_cyl - 1);
276 set_ch_t(&data->beg_ext, begcyl, beghead);
277 set_ch_t(&data->end_ext, endcyl, endhead);
281 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
282 struct dasd_device *device)
284 struct dasd_eckd_private *private;
287 private = (struct dasd_eckd_private *) device->private;
288 if (!private->rdc_data.facilities.XRC_supported)
291 /* switch on System Time Stamp - needed for XRC Support */
292 pfxdata->define_extend.ga_extended |= 0x08; /* 'Time Stamp Valid' */
293 pfxdata->define_extend.ga_extended |= 0x02; /* 'Extended Parameter' */
294 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
296 rc = get_sync_clock(&pfxdata->define_extend.ep_sys_time);
297 /* Ignore return code if sync clock is switched off. */
298 if (rc == -ENOSYS || rc == -EACCES)
303 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
304 unsigned int trk, unsigned int totrk, int cmd,
305 struct dasd_device *basedev, struct dasd_device *startdev)
307 struct dasd_eckd_private *basepriv, *startpriv;
308 struct DE_eckd_data *data;
310 u16 heads, beghead, endhead;
313 basepriv = (struct dasd_eckd_private *) basedev->private;
314 startpriv = (struct dasd_eckd_private *) startdev->private;
315 data = &pfxdata->define_extend;
317 ccw->cmd_code = DASD_ECKD_CCW_PFX;
319 ccw->count = sizeof(*pfxdata);
320 ccw->cda = (__u32) __pa(pfxdata);
322 memset(pfxdata, 0, sizeof(*pfxdata));
325 pfxdata->base_address = basepriv->ned->unit_addr;
326 pfxdata->base_lss = basepriv->ned->ID;
327 pfxdata->validity.define_extend = 1;
329 /* private uid is kept up to date, conf_data may be outdated */
330 if (startpriv->uid.type != UA_BASE_DEVICE) {
331 pfxdata->validity.verify_base = 1;
332 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
333 pfxdata->validity.hyper_pav = 1;
336 /* define extend data (mostly)*/
338 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
339 case DASD_ECKD_CCW_READ_RECORD_ZERO:
340 case DASD_ECKD_CCW_READ:
341 case DASD_ECKD_CCW_READ_MT:
342 case DASD_ECKD_CCW_READ_CKD:
343 case DASD_ECKD_CCW_READ_CKD_MT:
344 case DASD_ECKD_CCW_READ_KD:
345 case DASD_ECKD_CCW_READ_KD_MT:
346 case DASD_ECKD_CCW_READ_COUNT:
347 data->mask.perm = 0x1;
348 data->attributes.operation = basepriv->attrib.operation;
350 case DASD_ECKD_CCW_WRITE:
351 case DASD_ECKD_CCW_WRITE_MT:
352 case DASD_ECKD_CCW_WRITE_KD:
353 case DASD_ECKD_CCW_WRITE_KD_MT:
354 data->mask.perm = 0x02;
355 data->attributes.operation = basepriv->attrib.operation;
356 rc = check_XRC_on_prefix(pfxdata, basedev);
358 case DASD_ECKD_CCW_WRITE_CKD:
359 case DASD_ECKD_CCW_WRITE_CKD_MT:
360 data->attributes.operation = DASD_BYPASS_CACHE;
361 rc = check_XRC_on_prefix(pfxdata, basedev);
363 case DASD_ECKD_CCW_ERASE:
364 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
365 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
366 data->mask.perm = 0x3;
367 data->mask.auth = 0x1;
368 data->attributes.operation = DASD_BYPASS_CACHE;
369 rc = check_XRC_on_prefix(pfxdata, basedev);
372 DEV_MESSAGE(KERN_ERR, basedev, "unknown opcode 0x%x", cmd);
376 data->attributes.mode = 0x3; /* ECKD */
378 if ((basepriv->rdc_data.cu_type == 0x2105 ||
379 basepriv->rdc_data.cu_type == 0x2107 ||
380 basepriv->rdc_data.cu_type == 0x1750)
381 && !(basepriv->uses_cdl && trk < 2))
382 data->ga_extended |= 0x40; /* Regular Data Format Mode */
384 heads = basepriv->rdc_data.trk_per_cyl;
385 begcyl = trk / heads;
386 beghead = trk % heads;
387 endcyl = totrk / heads;
388 endhead = totrk % heads;
390 /* check for sequential prestage - enhance cylinder range */
391 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
392 data->attributes.operation == DASD_SEQ_ACCESS) {
394 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
395 endcyl += basepriv->attrib.nr_cyl;
397 endcyl = (basepriv->real_cyl - 1);
400 set_ch_t(&data->beg_ext, begcyl, beghead);
401 set_ch_t(&data->end_ext, endcyl, endhead);
406 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
407 unsigned int rec_on_trk, int no_rec, int cmd,
408 struct dasd_device * device, int reclen)
410 struct dasd_eckd_private *private;
414 private = (struct dasd_eckd_private *) device->private;
416 DBF_DEV_EVENT(DBF_INFO, device,
417 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
418 trk, rec_on_trk, no_rec, cmd, reclen);
420 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
423 ccw->cda = (__u32) __pa(data);
425 memset(data, 0, sizeof(struct LO_eckd_data));
428 switch (private->rdc_data.dev_type) {
430 dn = ceil_quot(reclen + 6, 232);
431 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
432 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
435 d = 7 + ceil_quot(reclen + 12, 32);
436 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
440 data->sector = sector;
441 data->count = no_rec;
443 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
444 data->operation.orientation = 0x3;
445 data->operation.operation = 0x03;
447 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
448 data->operation.orientation = 0x3;
449 data->operation.operation = 0x16;
451 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
452 data->operation.orientation = 0x1;
453 data->operation.operation = 0x03;
456 case DASD_ECKD_CCW_READ_RECORD_ZERO:
457 data->operation.orientation = 0x3;
458 data->operation.operation = 0x16;
461 case DASD_ECKD_CCW_WRITE:
462 case DASD_ECKD_CCW_WRITE_MT:
463 case DASD_ECKD_CCW_WRITE_KD:
464 case DASD_ECKD_CCW_WRITE_KD_MT:
465 data->auxiliary.last_bytes_used = 0x1;
466 data->length = reclen;
467 data->operation.operation = 0x01;
469 case DASD_ECKD_CCW_WRITE_CKD:
470 case DASD_ECKD_CCW_WRITE_CKD_MT:
471 data->auxiliary.last_bytes_used = 0x1;
472 data->length = reclen;
473 data->operation.operation = 0x03;
475 case DASD_ECKD_CCW_READ:
476 case DASD_ECKD_CCW_READ_MT:
477 case DASD_ECKD_CCW_READ_KD:
478 case DASD_ECKD_CCW_READ_KD_MT:
479 data->auxiliary.last_bytes_used = 0x1;
480 data->length = reclen;
481 data->operation.operation = 0x06;
483 case DASD_ECKD_CCW_READ_CKD:
484 case DASD_ECKD_CCW_READ_CKD_MT:
485 data->auxiliary.last_bytes_used = 0x1;
486 data->length = reclen;
487 data->operation.operation = 0x16;
489 case DASD_ECKD_CCW_READ_COUNT:
490 data->operation.operation = 0x06;
492 case DASD_ECKD_CCW_ERASE:
493 data->length = reclen;
494 data->auxiliary.last_bytes_used = 0x1;
495 data->operation.operation = 0x0b;
498 DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
500 set_ch_t(&data->seek_addr,
501 trk / private->rdc_data.trk_per_cyl,
502 trk % private->rdc_data.trk_per_cyl);
503 data->search_arg.cyl = data->seek_addr.cyl;
504 data->search_arg.head = data->seek_addr.head;
505 data->search_arg.record = rec_on_trk;
509 * Returns 1 if the block is one of the special blocks that needs
510 * to get read/written with the KD variant of the command.
511 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
512 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
513 * Luckily the KD variants differ only by one bit (0x08) from the
514 * normal variant. So don't wonder about code like:
515 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
516 * ccw->cmd_code |= 0x8;
519 dasd_eckd_cdl_special(int blk_per_trk, int recid)
523 if (recid < blk_per_trk)
525 if (recid < 2 * blk_per_trk)
531 * Returns the record size for the special blocks of the cdl format.
532 * Only returns something useful if dasd_eckd_cdl_special is true
536 dasd_eckd_cdl_reclen(int recid)
539 return sizes_trk0[recid];
544 * Generate device unique id that specifies the physical device.
546 static int dasd_eckd_generate_uid(struct dasd_device *device,
547 struct dasd_uid *uid)
549 struct dasd_eckd_private *private;
552 private = (struct dasd_eckd_private *) device->private;
555 if (!private->ned || !private->gneq)
558 memset(uid, 0, sizeof(struct dasd_uid));
559 memcpy(uid->vendor, private->ned->HDA_manufacturer,
560 sizeof(uid->vendor) - 1);
561 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
562 memcpy(uid->serial, private->ned->HDA_location,
563 sizeof(uid->serial) - 1);
564 EBCASC(uid->serial, sizeof(uid->serial) - 1);
565 uid->ssid = private->gneq->subsystemID;
566 uid->real_unit_addr = private->ned->unit_addr;;
568 uid->type = private->sneq->sua_flags;
569 if (uid->type == UA_BASE_PAV_ALIAS)
570 uid->base_unit_addr = private->sneq->base_unit_addr;
572 uid->type = UA_BASE_DEVICE;
574 if (private->vdsneq) {
575 for (count = 0; count < 16; count++) {
576 sprintf(uid->vduit+2*count, "%02x",
577 private->vdsneq->uit[count]);
583 static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
585 struct ciw *ciw, __u8 lpm)
587 struct dasd_ccw_req *cqr;
590 cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device);
593 DEV_MESSAGE(KERN_WARNING, device, "%s",
594 "Could not allocate RCD request");
599 ccw->cmd_code = ciw->cmd;
600 ccw->cda = (__u32)(addr_t)rcd_buffer;
601 ccw->count = ciw->count;
603 cqr->startdev = device;
604 cqr->memdev = device;
606 cqr->expires = 10*HZ;
608 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
610 cqr->buildclk = get_clock();
611 cqr->status = DASD_CQR_FILLED;
615 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
617 int *rcd_buffer_size, __u8 lpm)
620 char *rcd_buf = NULL;
622 struct dasd_ccw_req *cqr;
625 * scan for RCD command in extended SenseID data
627 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
628 if (!ciw || ciw->cmd == 0) {
632 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
639 * buffer has to start with EBCDIC "V1.0" to show
640 * support for virtual device SNEQ
646 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
651 ret = dasd_sleep_on(cqr);
653 * on success we update the user input parms
655 dasd_sfree_request(cqr, cqr->memdev);
659 *rcd_buffer_size = ciw->count;
660 *rcd_buffer = rcd_buf;
665 *rcd_buffer_size = 0;
669 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
672 struct dasd_sneq *sneq;
676 private->sneq = NULL;
677 private->vdsneq = NULL;
678 private->gneq = NULL;
679 count = private->conf_len / sizeof(struct dasd_sneq);
680 sneq = (struct dasd_sneq *)private->conf_data;
681 for (i = 0; i < count; ++i) {
682 if (sneq->flags.identifier == 1 && sneq->format == 1)
683 private->sneq = sneq;
684 else if (sneq->flags.identifier == 1 && sneq->format == 4)
685 private->vdsneq = (struct vd_sneq *)sneq;
686 else if (sneq->flags.identifier == 2)
687 private->gneq = (struct dasd_gneq *)sneq;
688 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
689 private->ned = (struct dasd_ned *)sneq;
692 if (!private->ned || !private->gneq) {
694 private->sneq = NULL;
695 private->vdsneq = NULL;
696 private->gneq = NULL;
703 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
705 struct dasd_gneq *gneq;
708 count = conf_len / sizeof(*gneq);
709 gneq = (struct dasd_gneq *)conf_data;
711 for (i = 0; i < count; ++i) {
712 if (gneq->flags.identifier == 2) {
719 return ((char *)gneq)[18] & 0x07;
724 static int dasd_eckd_read_conf(struct dasd_device *device)
727 int conf_len, conf_data_saved;
730 struct dasd_eckd_private *private;
731 struct dasd_eckd_path *path_data;
733 private = (struct dasd_eckd_private *) device->private;
734 path_data = (struct dasd_eckd_path *) &private->path_data;
735 path_data->opm = ccw_device_get_path_mask(device->cdev);
738 /* get configuration data per operational path */
739 for (lpm = 0x80; lpm; lpm>>= 1) {
740 if (lpm & path_data->opm){
741 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
743 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
744 MESSAGE(KERN_WARNING,
745 "Read configuration data returned "
749 if (conf_data == NULL) {
750 MESSAGE(KERN_WARNING, "%s", "No configuration "
752 continue; /* no error */
754 /* save first valid configuration data */
755 if (!conf_data_saved) {
756 kfree(private->conf_data);
757 private->conf_data = conf_data;
758 private->conf_len = conf_len;
759 if (dasd_eckd_identify_conf_parts(private)) {
760 private->conf_data = NULL;
761 private->conf_len = 0;
767 switch (dasd_eckd_path_access(conf_data, conf_len)) {
769 path_data->npm |= lpm;
772 path_data->ppm |= lpm;
775 if (conf_data != private->conf_data)
782 static int dasd_eckd_read_features(struct dasd_device *device)
784 struct dasd_psf_prssd_data *prssdp;
785 struct dasd_rssd_features *features;
786 struct dasd_ccw_req *cqr;
789 struct dasd_eckd_private *private;
791 private = (struct dasd_eckd_private *) device->private;
792 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
793 1 /* PSF */ + 1 /* RSSD */ ,
794 (sizeof(struct dasd_psf_prssd_data) +
795 sizeof(struct dasd_rssd_features)),
798 DEV_MESSAGE(KERN_WARNING, device, "%s",
799 "Could not allocate initialization request");
802 cqr->startdev = device;
803 cqr->memdev = device;
805 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
807 cqr->expires = 10 * HZ;
809 /* Prepare for Read Subsystem Data */
810 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
811 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
812 prssdp->order = PSF_ORDER_PRSSD;
813 prssdp->suborder = 0x41; /* Read Feature Codes */
814 /* all other bytes of prssdp must be zero */
817 ccw->cmd_code = DASD_ECKD_CCW_PSF;
818 ccw->count = sizeof(struct dasd_psf_prssd_data);
819 ccw->flags |= CCW_FLAG_CC;
820 ccw->cda = (__u32)(addr_t) prssdp;
822 /* Read Subsystem Data - feature codes */
823 features = (struct dasd_rssd_features *) (prssdp + 1);
824 memset(features, 0, sizeof(struct dasd_rssd_features));
827 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
828 ccw->count = sizeof(struct dasd_rssd_features);
829 ccw->cda = (__u32)(addr_t) features;
831 cqr->buildclk = get_clock();
832 cqr->status = DASD_CQR_FILLED;
833 rc = dasd_sleep_on(cqr);
835 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
836 features = (struct dasd_rssd_features *) (prssdp + 1);
837 memcpy(&private->features, features,
838 sizeof(struct dasd_rssd_features));
840 dasd_sfree_request(cqr, cqr->memdev);
846 * Build CP for Perform Subsystem Function - SSC.
848 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device)
850 struct dasd_ccw_req *cqr;
851 struct dasd_psf_ssc_data *psf_ssc_data;
854 cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ ,
855 sizeof(struct dasd_psf_ssc_data),
859 DEV_MESSAGE(KERN_WARNING, device, "%s",
860 "Could not allocate PSF-SSC request");
863 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
864 psf_ssc_data->order = PSF_ORDER_SSC;
865 psf_ssc_data->suborder = 0x88;
866 psf_ssc_data->reserved[0] = 0x88;
869 ccw->cmd_code = DASD_ECKD_CCW_PSF;
870 ccw->cda = (__u32)(addr_t)psf_ssc_data;
873 cqr->startdev = device;
874 cqr->memdev = device;
876 cqr->expires = 10*HZ;
877 cqr->buildclk = get_clock();
878 cqr->status = DASD_CQR_FILLED;
883 * Perform Subsystem Function.
884 * It is necessary to trigger CIO for channel revalidation since this
885 * call might change behaviour of DASD devices.
888 dasd_eckd_psf_ssc(struct dasd_device *device)
890 struct dasd_ccw_req *cqr;
893 cqr = dasd_eckd_build_psf_ssc(device);
897 rc = dasd_sleep_on(cqr);
899 /* trigger CIO to reprobe devices */
900 css_schedule_reprobe();
901 dasd_sfree_request(cqr, cqr->memdev);
906 * Valide storage server of current device.
908 static int dasd_eckd_validate_server(struct dasd_device *device)
911 struct dasd_eckd_private *private;
913 /* Currently PAV is the only reason to 'validate' server on LPAR */
914 if (dasd_nopav || MACHINE_IS_VM)
917 rc = dasd_eckd_psf_ssc(device);
918 /* may be requested feature is not available on server,
919 * therefore just report error and go ahead */
920 private = (struct dasd_eckd_private *) device->private;
921 DEV_MESSAGE(KERN_INFO, device,
922 "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d",
923 private->uid.vendor, private->uid.serial,
924 private->uid.ssid, rc);
925 /* RE-Read Configuration Data */
926 return dasd_eckd_read_conf(device);
930 * Check device characteristics.
931 * If the device is accessible using ECKD discipline, the device is enabled.
934 dasd_eckd_check_characteristics(struct dasd_device *device)
936 struct dasd_eckd_private *private;
937 struct dasd_block *block;
941 private = (struct dasd_eckd_private *) device->private;
942 if (private == NULL) {
943 private = kzalloc(sizeof(struct dasd_eckd_private),
944 GFP_KERNEL | GFP_DMA);
945 if (private == NULL) {
946 DEV_MESSAGE(KERN_WARNING, device, "%s",
947 "memory allocation failed for private "
951 device->private = (void *) private;
953 /* Invalidate status of initial analysis. */
954 private->init_cqr_status = -1;
955 /* Set default cache operations. */
956 private->attrib.operation = DASD_NORMAL_CACHE;
957 private->attrib.nr_cyl = 0;
959 /* Read Configuration Data */
960 rc = dasd_eckd_read_conf(device);
964 /* Generate device unique id and register in devmap */
965 rc = dasd_eckd_generate_uid(device, &private->uid);
968 dasd_set_uid(device->cdev, &private->uid);
970 if (private->uid.type == UA_BASE_DEVICE) {
971 block = dasd_alloc_block();
973 DEV_MESSAGE(KERN_WARNING, device, "%s",
974 "could not allocate dasd block structure");
978 device->block = block;
979 block->base = device;
982 /* register lcu with alias handling, enable PAV if this is a new lcu */
983 is_known = dasd_alias_make_device_known_to_lcu(device);
990 rc = dasd_eckd_validate_server(device); /* will switch pav on */
995 /* Read Feature Codes */
996 rc = dasd_eckd_read_features(device);
1000 /* Read Device Characteristics */
1001 rdc_data = (void *) &(private->rdc_data);
1002 memset(rdc_data, 0, sizeof(rdc_data));
1003 rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64);
1005 DEV_MESSAGE(KERN_WARNING, device,
1006 "Read device characteristics returned "
1010 /* find the vaild cylinder size */
1011 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1012 private->rdc_data.long_no_cyl)
1013 private->real_cyl = private->rdc_data.long_no_cyl;
1015 private->real_cyl = private->rdc_data.no_cyl;
1017 DEV_MESSAGE(KERN_INFO, device,
1018 "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d",
1019 private->rdc_data.dev_type,
1020 private->rdc_data.dev_model,
1021 private->rdc_data.cu_type,
1022 private->rdc_data.cu_model.model,
1024 private->rdc_data.trk_per_cyl,
1025 private->rdc_data.sec_per_trk);
1029 dasd_alias_disconnect_device_from_lcu(device);
1031 dasd_free_block(device->block);
1032 device->block = NULL;
1034 kfree(private->conf_data);
1035 kfree(device->private);
1036 device->private = NULL;
1040 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1042 struct dasd_eckd_private *private;
1044 private = (struct dasd_eckd_private *) device->private;
1045 dasd_alias_disconnect_device_from_lcu(device);
1046 private->ned = NULL;
1047 private->sneq = NULL;
1048 private->vdsneq = NULL;
1049 private->gneq = NULL;
1050 private->conf_len = 0;
1051 kfree(private->conf_data);
1052 private->conf_data = NULL;
1055 static struct dasd_ccw_req *
1056 dasd_eckd_analysis_ccw(struct dasd_device *device)
1058 struct dasd_eckd_private *private;
1059 struct eckd_count *count_data;
1060 struct LO_eckd_data *LO_data;
1061 struct dasd_ccw_req *cqr;
1063 int cplength, datasize;
1066 private = (struct dasd_eckd_private *) device->private;
1069 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1070 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1071 cplength, datasize, device);
1075 /* Define extent for the first 3 tracks. */
1076 define_extent(ccw++, cqr->data, 0, 2,
1077 DASD_ECKD_CCW_READ_COUNT, device);
1078 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1079 /* Locate record for the first 4 records on track 0. */
1080 ccw[-1].flags |= CCW_FLAG_CC;
1081 locate_record(ccw++, LO_data++, 0, 0, 4,
1082 DASD_ECKD_CCW_READ_COUNT, device, 0);
1084 count_data = private->count_area;
1085 for (i = 0; i < 4; i++) {
1086 ccw[-1].flags |= CCW_FLAG_CC;
1087 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1090 ccw->cda = (__u32)(addr_t) count_data;
1095 /* Locate record for the first record on track 2. */
1096 ccw[-1].flags |= CCW_FLAG_CC;
1097 locate_record(ccw++, LO_data++, 2, 0, 1,
1098 DASD_ECKD_CCW_READ_COUNT, device, 0);
1099 /* Read count ccw. */
1100 ccw[-1].flags |= CCW_FLAG_CC;
1101 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1104 ccw->cda = (__u32)(addr_t) count_data;
1107 cqr->startdev = device;
1108 cqr->memdev = device;
1110 cqr->buildclk = get_clock();
1111 cqr->status = DASD_CQR_FILLED;
1116 * This is the callback function for the init_analysis cqr. It saves
1117 * the status of the initial analysis ccw before it frees it and kicks
1118 * the device to continue the startup sequence. This will call
1119 * dasd_eckd_do_analysis again (if the devices has not been marked
1120 * for deletion in the meantime).
1123 dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data)
1125 struct dasd_eckd_private *private;
1126 struct dasd_device *device;
1128 device = init_cqr->startdev;
1129 private = (struct dasd_eckd_private *) device->private;
1130 private->init_cqr_status = init_cqr->status;
1131 dasd_sfree_request(init_cqr, device);
1132 dasd_kick_device(device);
1136 dasd_eckd_start_analysis(struct dasd_block *block)
1138 struct dasd_eckd_private *private;
1139 struct dasd_ccw_req *init_cqr;
1141 private = (struct dasd_eckd_private *) block->base->private;
1142 init_cqr = dasd_eckd_analysis_ccw(block->base);
1143 if (IS_ERR(init_cqr))
1144 return PTR_ERR(init_cqr);
1145 init_cqr->callback = dasd_eckd_analysis_callback;
1146 init_cqr->callback_data = NULL;
1147 init_cqr->expires = 5*HZ;
1148 dasd_add_request_head(init_cqr);
1153 dasd_eckd_end_analysis(struct dasd_block *block)
1155 struct dasd_device *device;
1156 struct dasd_eckd_private *private;
1157 struct eckd_count *count_area;
1158 unsigned int sb, blk_per_trk;
1161 device = block->base;
1162 private = (struct dasd_eckd_private *) device->private;
1163 status = private->init_cqr_status;
1164 private->init_cqr_status = -1;
1165 if (status != DASD_CQR_DONE) {
1166 DEV_MESSAGE(KERN_WARNING, device, "%s",
1167 "volume analysis returned unformatted disk");
1168 return -EMEDIUMTYPE;
1171 private->uses_cdl = 1;
1172 /* Check Track 0 for Compatible Disk Layout */
1174 for (i = 0; i < 3; i++) {
1175 if (private->count_area[i].kl != 4 ||
1176 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1177 private->uses_cdl = 0;
1182 count_area = &private->count_area[4];
1184 if (private->uses_cdl == 0) {
1185 for (i = 0; i < 5; i++) {
1186 if ((private->count_area[i].kl != 0) ||
1187 (private->count_area[i].dl !=
1188 private->count_area[0].dl))
1192 count_area = &private->count_area[0];
1194 if (private->count_area[3].record == 1)
1195 DEV_MESSAGE(KERN_WARNING, device, "%s",
1196 "Trk 0: no records after VTOC!");
1198 if (count_area != NULL && count_area->kl == 0) {
1199 /* we found notthing violating our disk layout */
1200 if (dasd_check_blocksize(count_area->dl) == 0)
1201 block->bp_block = count_area->dl;
1203 if (block->bp_block == 0) {
1204 DEV_MESSAGE(KERN_WARNING, device, "%s",
1205 "Volume has incompatible disk layout");
1206 return -EMEDIUMTYPE;
1208 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1209 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1212 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
1213 block->blocks = (private->real_cyl *
1214 private->rdc_data.trk_per_cyl *
1217 DEV_MESSAGE(KERN_INFO, device,
1218 "(%dkB blks): %dkB at %dkB/trk %s",
1219 (block->bp_block >> 10),
1220 ((private->real_cyl *
1221 private->rdc_data.trk_per_cyl *
1222 blk_per_trk * (block->bp_block >> 9)) >> 1),
1223 ((blk_per_trk * block->bp_block) >> 10),
1225 "compatible disk layout" : "linux disk layout");
1230 static int dasd_eckd_do_analysis(struct dasd_block *block)
1232 struct dasd_eckd_private *private;
1234 private = (struct dasd_eckd_private *) block->base->private;
1235 if (private->init_cqr_status < 0)
1236 return dasd_eckd_start_analysis(block);
1238 return dasd_eckd_end_analysis(block);
1241 static int dasd_eckd_ready_to_online(struct dasd_device *device)
1243 return dasd_alias_add_device(device);
1246 static int dasd_eckd_online_to_ready(struct dasd_device *device)
1248 return dasd_alias_remove_device(device);
1252 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1254 struct dasd_eckd_private *private;
1256 private = (struct dasd_eckd_private *) block->base->private;
1257 if (dasd_check_blocksize(block->bp_block) == 0) {
1258 geo->sectors = recs_per_track(&private->rdc_data,
1259 0, block->bp_block);
1261 geo->cylinders = private->rdc_data.no_cyl;
1262 geo->heads = private->rdc_data.trk_per_cyl;
1266 static struct dasd_ccw_req *
1267 dasd_eckd_format_device(struct dasd_device * device,
1268 struct format_data_t * fdata)
1270 struct dasd_eckd_private *private;
1271 struct dasd_ccw_req *fcp;
1272 struct eckd_count *ect;
1276 struct ch_t address;
1277 int cplength, datasize;
1282 private = (struct dasd_eckd_private *) device->private;
1283 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
1285 fdata->start_unit / private->rdc_data.trk_per_cyl,
1286 fdata->start_unit % private->rdc_data.trk_per_cyl);
1288 /* Sanity checks. */
1289 if (fdata->start_unit >=
1290 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
1291 DEV_MESSAGE(KERN_INFO, device, "Track no %u too big!",
1293 return ERR_PTR(-EINVAL);
1295 if (fdata->start_unit > fdata->stop_unit) {
1296 DEV_MESSAGE(KERN_INFO, device, "Track %u reached! ending.",
1298 return ERR_PTR(-EINVAL);
1300 if (dasd_check_blocksize(fdata->blksize) != 0) {
1301 DEV_MESSAGE(KERN_WARNING, device,
1302 "Invalid blocksize %u...terminating!",
1304 return ERR_PTR(-EINVAL);
1308 * fdata->intensity is a bit string that tells us what to do:
1309 * Bit 0: write record zero
1310 * Bit 1: write home address, currently not supported
1311 * Bit 2: invalidate tracks
1312 * Bit 3: use OS/390 compatible disk layout (cdl)
1313 * Bit 4: do not allow storage subsystem to modify record zero
1314 * Only some bit combinations do make sense.
1316 if (fdata->intensity & 0x10) {
1318 intensity = fdata->intensity & ~0x10;
1321 intensity = fdata->intensity;
1323 switch (intensity) {
1324 case 0x00: /* Normal format */
1325 case 0x08: /* Normal format, use cdl. */
1327 datasize = sizeof(struct DE_eckd_data) +
1328 sizeof(struct LO_eckd_data) +
1329 rpt * sizeof(struct eckd_count);
1331 case 0x01: /* Write record zero and format track. */
1332 case 0x09: /* Write record zero and format track, use cdl. */
1334 datasize = sizeof(struct DE_eckd_data) +
1335 sizeof(struct LO_eckd_data) +
1336 sizeof(struct eckd_count) +
1337 rpt * sizeof(struct eckd_count);
1339 case 0x04: /* Invalidate track. */
1340 case 0x0c: /* Invalidate track, use cdl. */
1342 datasize = sizeof(struct DE_eckd_data) +
1343 sizeof(struct LO_eckd_data) +
1344 sizeof(struct eckd_count);
1347 DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.",
1349 return ERR_PTR(-EINVAL);
1351 /* Allocate the format ccw request. */
1352 fcp = dasd_smalloc_request(dasd_eckd_discipline.name,
1353 cplength, datasize, device);
1360 switch (intensity & ~0x08) {
1361 case 0x00: /* Normal format. */
1362 define_extent(ccw++, (struct DE_eckd_data *) data,
1363 fdata->start_unit, fdata->start_unit,
1364 DASD_ECKD_CCW_WRITE_CKD, device);
1365 /* grant subsystem permission to format R0 */
1367 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1368 data += sizeof(struct DE_eckd_data);
1369 ccw[-1].flags |= CCW_FLAG_CC;
1370 locate_record(ccw++, (struct LO_eckd_data *) data,
1371 fdata->start_unit, 0, rpt,
1372 DASD_ECKD_CCW_WRITE_CKD, device,
1374 data += sizeof(struct LO_eckd_data);
1376 case 0x01: /* Write record zero + format track. */
1377 define_extent(ccw++, (struct DE_eckd_data *) data,
1378 fdata->start_unit, fdata->start_unit,
1379 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1381 data += sizeof(struct DE_eckd_data);
1382 ccw[-1].flags |= CCW_FLAG_CC;
1383 locate_record(ccw++, (struct LO_eckd_data *) data,
1384 fdata->start_unit, 0, rpt + 1,
1385 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
1386 device->block->bp_block);
1387 data += sizeof(struct LO_eckd_data);
1389 case 0x04: /* Invalidate track. */
1390 define_extent(ccw++, (struct DE_eckd_data *) data,
1391 fdata->start_unit, fdata->start_unit,
1392 DASD_ECKD_CCW_WRITE_CKD, device);
1393 data += sizeof(struct DE_eckd_data);
1394 ccw[-1].flags |= CCW_FLAG_CC;
1395 locate_record(ccw++, (struct LO_eckd_data *) data,
1396 fdata->start_unit, 0, 1,
1397 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1398 data += sizeof(struct LO_eckd_data);
1401 if (intensity & 0x01) { /* write record zero */
1402 ect = (struct eckd_count *) data;
1403 data += sizeof(struct eckd_count);
1404 ect->cyl = address.cyl;
1405 ect->head = address.head;
1409 ccw[-1].flags |= CCW_FLAG_CC;
1410 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1411 ccw->flags = CCW_FLAG_SLI;
1413 ccw->cda = (__u32)(addr_t) ect;
1416 if ((intensity & ~0x08) & 0x04) { /* erase track */
1417 ect = (struct eckd_count *) data;
1418 data += sizeof(struct eckd_count);
1419 ect->cyl = address.cyl;
1420 ect->head = address.head;
1424 ccw[-1].flags |= CCW_FLAG_CC;
1425 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1426 ccw->flags = CCW_FLAG_SLI;
1428 ccw->cda = (__u32)(addr_t) ect;
1429 } else { /* write remaining records */
1430 for (i = 0; i < rpt; i++) {
1431 ect = (struct eckd_count *) data;
1432 data += sizeof(struct eckd_count);
1433 ect->cyl = address.cyl;
1434 ect->head = address.head;
1435 ect->record = i + 1;
1437 ect->dl = fdata->blksize;
1438 /* Check for special tracks 0-1 when formatting CDL */
1439 if ((intensity & 0x08) &&
1440 fdata->start_unit == 0) {
1443 ect->dl = sizes_trk0[i] - 4;
1446 if ((intensity & 0x08) &&
1447 fdata->start_unit == 1) {
1449 ect->dl = LABEL_SIZE - 44;
1451 ccw[-1].flags |= CCW_FLAG_CC;
1452 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1453 ccw->flags = CCW_FLAG_SLI;
1455 ccw->cda = (__u32)(addr_t) ect;
1459 fcp->startdev = device;
1460 fcp->memdev = device;
1461 clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags);
1462 fcp->retries = 5; /* set retry counter to enable default ERP */
1463 fcp->buildclk = get_clock();
1464 fcp->status = DASD_CQR_FILLED;
1468 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1470 cqr->status = DASD_CQR_FILLED;
1471 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1472 dasd_eckd_reset_ccw_to_base_io(cqr);
1473 cqr->startdev = cqr->block->base;
1477 static dasd_erp_fn_t
1478 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1480 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1481 struct ccw_device *cdev = device->cdev;
1483 switch (cdev->id.cu_type) {
1488 return dasd_3990_erp_action;
1492 return dasd_default_erp_action;
1496 static dasd_erp_fn_t
1497 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1499 return dasd_default_erp_postaction;
1503 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1508 /* first of all check for state change pending interrupt */
1509 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
1510 if ((irb->scsw.cmd.dstat & mask) == mask) {
1511 dasd_generic_handle_state_change(device);
1515 /* summary unit check */
1516 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
1517 (irb->ecw[7] == 0x0D)) {
1518 dasd_alias_handle_summary_unit_check(device, irb);
1523 /* service information message SIM */
1524 if (irb->esw.esw0.erw.cons && !(irb->ecw[27] & DASD_SENSE_BIT_0) &&
1525 ((irb->ecw[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1526 dasd_3990_erp_handle_sim(device, irb->ecw);
1527 dasd_schedule_device_bh(device);
1531 if ((irb->scsw.cmd.cc == 1) &&
1532 (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
1533 (irb->scsw.cmd.actl & SCSW_ACTL_START_PEND) &&
1534 (irb->scsw.cmd.stctl & SCSW_STCTL_STATUS_PEND)) {
1535 /* fake irb do nothing, they are handled elsewhere */
1536 dasd_schedule_device_bh(device);
1540 if (!(irb->esw.esw0.erw.cons)) {
1541 /* just report other unsolicited interrupts */
1542 DEV_MESSAGE(KERN_ERR, device, "%s",
1543 "unsolicited interrupt received");
1545 DEV_MESSAGE(KERN_ERR, device, "%s",
1546 "unsolicited interrupt received "
1547 "(sense available)");
1548 device->discipline->dump_sense(device, NULL, irb);
1551 dasd_schedule_device_bh(device);
1555 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
1556 struct dasd_block *block,
1557 struct request *req)
1559 struct dasd_eckd_private *private;
1560 unsigned long *idaws;
1561 struct LO_eckd_data *LO_data;
1562 struct dasd_ccw_req *cqr;
1564 struct req_iterator iter;
1567 unsigned int blksize, blk_per_trk, off;
1568 int count, cidaw, cplength, datasize;
1569 sector_t recid, first_rec, last_rec;
1570 sector_t first_trk, last_trk;
1571 unsigned int first_offs, last_offs;
1572 unsigned char cmd, rcmd;
1574 struct dasd_device *basedev;
1576 basedev = block->base;
1577 private = (struct dasd_eckd_private *) basedev->private;
1578 if (rq_data_dir(req) == READ)
1579 cmd = DASD_ECKD_CCW_READ_MT;
1580 else if (rq_data_dir(req) == WRITE)
1581 cmd = DASD_ECKD_CCW_WRITE_MT;
1583 return ERR_PTR(-EINVAL);
1584 /* Calculate number of blocks/records per track. */
1585 blksize = block->bp_block;
1586 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
1587 /* Calculate record id of first and last block. */
1588 first_rec = first_trk = req->sector >> block->s2b_shift;
1589 first_offs = sector_div(first_trk, blk_per_trk);
1590 last_rec = last_trk =
1591 (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
1592 last_offs = sector_div(last_trk, blk_per_trk);
1593 /* Check struct bio and count the number of blocks for the request. */
1596 rq_for_each_segment(bv, req, iter) {
1597 if (bv->bv_len & (blksize - 1))
1598 /* Eckd can only do full blocks. */
1599 return ERR_PTR(-EINVAL);
1600 count += bv->bv_len >> (block->s2b_shift + 9);
1601 #if defined(CONFIG_64BIT)
1602 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
1603 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1607 if (count != last_rec - first_rec + 1)
1608 return ERR_PTR(-EINVAL);
1610 /* use the prefix command if available */
1611 use_prefix = private->features.feature[8] & 0x01;
1613 /* 1x prefix + number of blocks */
1614 cplength = 2 + count;
1615 /* 1x prefix + cidaws*sizeof(long) */
1616 datasize = sizeof(struct PFX_eckd_data) +
1617 sizeof(struct LO_eckd_data) +
1618 cidaw * sizeof(unsigned long);
1620 /* 1x define extent + 1x locate record + number of blocks */
1621 cplength = 2 + count;
1622 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1623 datasize = sizeof(struct DE_eckd_data) +
1624 sizeof(struct LO_eckd_data) +
1625 cidaw * sizeof(unsigned long);
1627 /* Find out the number of additional locate record ccws for cdl. */
1628 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1629 if (last_rec >= 2*blk_per_trk)
1630 count = 2*blk_per_trk - first_rec;
1632 datasize += count*sizeof(struct LO_eckd_data);
1634 /* Allocate the ccw request. */
1635 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1636 cplength, datasize, startdev);
1640 /* First ccw is define extent or prefix. */
1642 if (prefix(ccw++, cqr->data, first_trk,
1643 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1644 /* Clock not in sync and XRC is enabled.
1647 dasd_sfree_request(cqr, startdev);
1648 return ERR_PTR(-EAGAIN);
1650 idaws = (unsigned long *) (cqr->data +
1651 sizeof(struct PFX_eckd_data));
1653 if (define_extent(ccw++, cqr->data, first_trk,
1654 last_trk, cmd, startdev) == -EAGAIN) {
1655 /* Clock not in sync and XRC is enabled.
1658 dasd_sfree_request(cqr, startdev);
1659 return ERR_PTR(-EAGAIN);
1661 idaws = (unsigned long *) (cqr->data +
1662 sizeof(struct DE_eckd_data));
1664 /* Build locate_record+read/write/ccws. */
1665 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1667 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1668 /* Only standard blocks so there is just one locate record. */
1669 ccw[-1].flags |= CCW_FLAG_CC;
1670 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1671 last_rec - recid + 1, cmd, basedev, blksize);
1673 rq_for_each_segment(bv, req, iter) {
1674 dst = page_address(bv->bv_page) + bv->bv_offset;
1675 if (dasd_page_cache) {
1676 char *copy = kmem_cache_alloc(dasd_page_cache,
1677 GFP_DMA | __GFP_NOWARN);
1678 if (copy && rq_data_dir(req) == WRITE)
1679 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1681 dst = copy + bv->bv_offset;
1683 for (off = 0; off < bv->bv_len; off += blksize) {
1684 sector_t trkid = recid;
1685 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1688 /* Locate record for cdl special block ? */
1689 if (private->uses_cdl && recid < 2*blk_per_trk) {
1690 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1692 count = dasd_eckd_cdl_reclen(recid);
1693 if (count < blksize &&
1694 rq_data_dir(req) == READ)
1695 memset(dst + count, 0xe5,
1698 ccw[-1].flags |= CCW_FLAG_CC;
1699 locate_record(ccw++, LO_data++,
1701 1, rcmd, basedev, count);
1703 /* Locate record for standard blocks ? */
1704 if (private->uses_cdl && recid == 2*blk_per_trk) {
1705 ccw[-1].flags |= CCW_FLAG_CC;
1706 locate_record(ccw++, LO_data++,
1708 last_rec - recid + 1,
1709 cmd, basedev, count);
1711 /* Read/write ccw. */
1712 ccw[-1].flags |= CCW_FLAG_CC;
1713 ccw->cmd_code = rcmd;
1715 if (idal_is_needed(dst, blksize)) {
1716 ccw->cda = (__u32)(addr_t) idaws;
1717 ccw->flags = CCW_FLAG_IDA;
1718 idaws = idal_create_words(idaws, dst, blksize);
1720 ccw->cda = (__u32)(addr_t) dst;
1728 if (blk_noretry_request(req) ||
1729 block->base->features & DASD_FEATURE_FAILFAST)
1730 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1731 cqr->startdev = startdev;
1732 cqr->memdev = startdev;
1734 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1735 cqr->lpm = private->path_data.ppm;
1737 cqr->buildclk = get_clock();
1738 cqr->status = DASD_CQR_FILLED;
1743 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
1745 struct dasd_eckd_private *private;
1747 struct req_iterator iter;
1750 unsigned int blksize, blk_per_trk, off;
1754 if (!dasd_page_cache)
1756 private = (struct dasd_eckd_private *) cqr->block->base->private;
1757 blksize = cqr->block->bp_block;
1758 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
1759 recid = req->sector >> cqr->block->s2b_shift;
1761 /* Skip over define extent & locate record. */
1763 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
1765 rq_for_each_segment(bv, req, iter) {
1766 dst = page_address(bv->bv_page) + bv->bv_offset;
1767 for (off = 0; off < bv->bv_len; off += blksize) {
1768 /* Skip locate record. */
1769 if (private->uses_cdl && recid <= 2*blk_per_trk)
1772 if (ccw->flags & CCW_FLAG_IDA)
1773 cda = *((char **)((addr_t) ccw->cda));
1775 cda = (char *)((addr_t) ccw->cda);
1777 if (rq_data_dir(req) == READ)
1778 memcpy(dst, cda, bv->bv_len);
1779 kmem_cache_free(dasd_page_cache,
1780 (void *)((addr_t)cda & PAGE_MASK));
1789 status = cqr->status == DASD_CQR_DONE;
1790 dasd_sfree_request(cqr, cqr->memdev);
1795 * Modify ccw chain in cqr so it can be started on a base device.
1797 * Note that this is not enough to restart the cqr!
1798 * Either reset cqr->startdev as well (summary unit check handling)
1799 * or restart via separate cqr (as in ERP handling).
1801 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
1804 struct PFX_eckd_data *pfxdata;
1807 pfxdata = cqr->data;
1809 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
1810 pfxdata->validity.verify_base = 0;
1811 pfxdata->validity.hyper_pav = 0;
1815 #define DASD_ECKD_CHANQ_MAX_SIZE 4
1817 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
1818 struct dasd_block *block,
1819 struct request *req)
1821 struct dasd_eckd_private *private;
1822 struct dasd_device *startdev;
1823 unsigned long flags;
1824 struct dasd_ccw_req *cqr;
1826 startdev = dasd_alias_get_start_dev(base);
1829 private = (struct dasd_eckd_private *) startdev->private;
1830 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
1831 return ERR_PTR(-EBUSY);
1833 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
1835 cqr = dasd_eckd_build_cp(startdev, block, req);
1838 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
1842 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
1843 struct request *req)
1845 struct dasd_eckd_private *private;
1846 unsigned long flags;
1848 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
1849 private = (struct dasd_eckd_private *) cqr->memdev->private;
1851 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
1852 return dasd_eckd_free_cp(cqr, req);
1856 dasd_eckd_fill_info(struct dasd_device * device,
1857 struct dasd_information2_t * info)
1859 struct dasd_eckd_private *private;
1861 private = (struct dasd_eckd_private *) device->private;
1862 info->label_block = 2;
1863 info->FBA_layout = private->uses_cdl ? 0 : 1;
1864 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
1865 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
1866 memcpy(info->characteristics, &private->rdc_data,
1867 sizeof(struct dasd_eckd_characteristics));
1868 info->confdata_size = min((unsigned long)private->conf_len,
1869 sizeof(info->configuration_data));
1870 memcpy(info->configuration_data, private->conf_data,
1871 info->confdata_size);
1876 * SECTION: ioctl functions for eckd devices.
1880 * Release device ioctl.
1881 * Buils a channel programm to releases a prior reserved
1882 * (see dasd_eckd_reserve) device.
1885 dasd_eckd_release(struct dasd_device *device)
1887 struct dasd_ccw_req *cqr;
1890 if (!capable(CAP_SYS_ADMIN))
1893 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1896 DEV_MESSAGE(KERN_WARNING, device, "%s",
1897 "Could not allocate initialization request");
1898 return PTR_ERR(cqr);
1900 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE;
1901 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1902 cqr->cpaddr->count = 32;
1903 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1904 cqr->startdev = device;
1905 cqr->memdev = device;
1906 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1907 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1908 cqr->retries = 2; /* set retry counter to enable basic ERP */
1909 cqr->expires = 2 * HZ;
1910 cqr->buildclk = get_clock();
1911 cqr->status = DASD_CQR_FILLED;
1913 rc = dasd_sleep_on_immediatly(cqr);
1915 dasd_sfree_request(cqr, cqr->memdev);
1920 * Reserve device ioctl.
1921 * Options are set to 'synchronous wait for interrupt' and
1922 * 'timeout the request'. This leads to a terminate IO if
1923 * the interrupt is outstanding for a certain time.
1926 dasd_eckd_reserve(struct dasd_device *device)
1928 struct dasd_ccw_req *cqr;
1931 if (!capable(CAP_SYS_ADMIN))
1934 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1937 DEV_MESSAGE(KERN_WARNING, device, "%s",
1938 "Could not allocate initialization request");
1939 return PTR_ERR(cqr);
1941 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE;
1942 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1943 cqr->cpaddr->count = 32;
1944 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1945 cqr->startdev = device;
1946 cqr->memdev = device;
1947 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1948 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1949 cqr->retries = 2; /* set retry counter to enable basic ERP */
1950 cqr->expires = 2 * HZ;
1951 cqr->buildclk = get_clock();
1952 cqr->status = DASD_CQR_FILLED;
1954 rc = dasd_sleep_on_immediatly(cqr);
1956 dasd_sfree_request(cqr, cqr->memdev);
1961 * Steal lock ioctl - unconditional reserve device.
1962 * Buils a channel programm to break a device's reservation.
1963 * (unconditional reserve)
1966 dasd_eckd_steal_lock(struct dasd_device *device)
1968 struct dasd_ccw_req *cqr;
1971 if (!capable(CAP_SYS_ADMIN))
1974 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1977 DEV_MESSAGE(KERN_WARNING, device, "%s",
1978 "Could not allocate initialization request");
1979 return PTR_ERR(cqr);
1981 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK;
1982 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1983 cqr->cpaddr->count = 32;
1984 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1985 cqr->startdev = device;
1986 cqr->memdev = device;
1987 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1988 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1989 cqr->retries = 2; /* set retry counter to enable basic ERP */
1990 cqr->expires = 2 * HZ;
1991 cqr->buildclk = get_clock();
1992 cqr->status = DASD_CQR_FILLED;
1994 rc = dasd_sleep_on_immediatly(cqr);
1996 dasd_sfree_request(cqr, cqr->memdev);
2001 * Read performance statistics
2004 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
2006 struct dasd_psf_prssd_data *prssdp;
2007 struct dasd_rssd_perf_stats_t *stats;
2008 struct dasd_ccw_req *cqr;
2012 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
2013 1 /* PSF */ + 1 /* RSSD */ ,
2014 (sizeof(struct dasd_psf_prssd_data) +
2015 sizeof(struct dasd_rssd_perf_stats_t)),
2018 DEV_MESSAGE(KERN_WARNING, device, "%s",
2019 "Could not allocate initialization request");
2020 return PTR_ERR(cqr);
2022 cqr->startdev = device;
2023 cqr->memdev = device;
2025 cqr->expires = 10 * HZ;
2027 /* Prepare for Read Subsystem Data */
2028 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2029 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
2030 prssdp->order = PSF_ORDER_PRSSD;
2031 prssdp->suborder = 0x01; /* Performance Statistics */
2032 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2035 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2036 ccw->count = sizeof(struct dasd_psf_prssd_data);
2037 ccw->flags |= CCW_FLAG_CC;
2038 ccw->cda = (__u32)(addr_t) prssdp;
2040 /* Read Subsystem Data - Performance Statistics */
2041 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2042 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
2045 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2046 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
2047 ccw->cda = (__u32)(addr_t) stats;
2049 cqr->buildclk = get_clock();
2050 cqr->status = DASD_CQR_FILLED;
2051 rc = dasd_sleep_on(cqr);
2053 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2054 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2055 if (copy_to_user(argp, stats,
2056 sizeof(struct dasd_rssd_perf_stats_t)))
2059 dasd_sfree_request(cqr, cqr->memdev);
2064 * Get attributes (cache operations)
2065 * Returnes the cache attributes used in Define Extend (DE).
2068 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
2070 struct dasd_eckd_private *private =
2071 (struct dasd_eckd_private *)device->private;
2072 struct attrib_data_t attrib = private->attrib;
2075 if (!capable(CAP_SYS_ADMIN))
2081 if (copy_to_user(argp, (long *) &attrib,
2082 sizeof(struct attrib_data_t)))
2089 * Set attributes (cache operations)
2090 * Stores the attributes for cache operation to be used in Define Extend (DE).
2093 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
2095 struct dasd_eckd_private *private =
2096 (struct dasd_eckd_private *)device->private;
2097 struct attrib_data_t attrib;
2099 if (!capable(CAP_SYS_ADMIN))
2104 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
2106 private->attrib = attrib;
2108 DEV_MESSAGE(KERN_INFO, device,
2109 "cache operation mode set to %x (%i cylinder prestage)",
2110 private->attrib.operation, private->attrib.nr_cyl);
2115 * Issue syscall I/O to EMC Symmetrix array.
2116 * CCWs are PSF and RSSD
2118 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2120 struct dasd_symmio_parms usrparm;
2121 char *psf_data, *rssd_result;
2122 struct dasd_ccw_req *cqr;
2126 /* Copy parms from caller */
2128 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2130 #ifndef CONFIG_64BIT
2131 /* Make sure pointers are sane even on 31 bit. */
2132 if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
2137 /* alloc I/O data area */
2138 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2139 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2140 if (!psf_data || !rssd_result) {
2145 /* get syscall header from user space */
2147 if (copy_from_user(psf_data,
2148 (void __user *)(unsigned long) usrparm.psf_data,
2149 usrparm.psf_data_len))
2152 /* sanity check on syscall header */
2153 if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
2158 /* setup CCWs for PSF + RSSD */
2159 cqr = dasd_smalloc_request("ECKD", 2 , 0, device);
2161 DEV_MESSAGE(KERN_WARNING, device, "%s",
2162 "Could not allocate initialization request");
2167 cqr->startdev = device;
2168 cqr->memdev = device;
2170 cqr->expires = 10 * HZ;
2171 cqr->buildclk = get_clock();
2172 cqr->status = DASD_CQR_FILLED;
2174 /* Build the ccws */
2178 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2179 ccw->count = usrparm.psf_data_len;
2180 ccw->flags |= CCW_FLAG_CC;
2181 ccw->cda = (__u32)(addr_t) psf_data;
2186 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2187 ccw->count = usrparm.rssd_result_len;
2188 ccw->flags = CCW_FLAG_SLI ;
2189 ccw->cda = (__u32)(addr_t) rssd_result;
2191 rc = dasd_sleep_on(cqr);
2196 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2197 rssd_result, usrparm.rssd_result_len))
2202 dasd_sfree_request(cqr, cqr->memdev);
2207 DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
2212 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
2214 struct dasd_device *device = block->base;
2218 return dasd_eckd_get_attrib(device, argp);
2220 return dasd_eckd_set_attrib(device, argp);
2222 return dasd_eckd_performance(device, argp);
2224 return dasd_eckd_release(device);
2226 return dasd_eckd_reserve(device);
2228 return dasd_eckd_steal_lock(device);
2230 return dasd_symm_io(device, argp);
2232 return -ENOIOCTLCMD;
2237 * Dump the range of CCWs into 'page' buffer
2238 * and return number of printed chars.
2241 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
2247 while (from <= to) {
2248 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2249 " CCW %p: %08X %08X DAT:",
2250 from, ((int *) from)[0], ((int *) from)[1]);
2252 /* get pointer to data (consider IDALs) */
2253 if (from->flags & CCW_FLAG_IDA)
2254 datap = (char *) *((addr_t *) (addr_t) from->cda);
2256 datap = (char *) ((addr_t) from->cda);
2258 /* dump data (max 32 bytes) */
2259 for (count = 0; count < from->count && count < 32; count++) {
2260 if (count % 8 == 0) len += sprintf(page + len, " ");
2261 if (count % 4 == 0) len += sprintf(page + len, " ");
2262 len += sprintf(page + len, "%02x", datap[count]);
2264 len += sprintf(page + len, "\n");
2271 * Print sense data and related channel program.
2272 * Parts are printed because printk buffer is only 1024 bytes.
2274 static void dasd_eckd_dump_sense(struct dasd_device *device,
2275 struct dasd_ccw_req *req, struct irb *irb)
2278 struct ccw1 *first, *last, *fail, *from, *to;
2281 page = (char *) get_zeroed_page(GFP_ATOMIC);
2283 DEV_MESSAGE(KERN_ERR, device, " %s",
2284 "No memory to dump sense data");
2287 /* dump the sense data */
2288 len = sprintf(page, KERN_ERR PRINTK_HEADER
2289 " I/O status report for device %s:\n",
2290 dev_name(&device->cdev->dev));
2291 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2292 " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
2293 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
2294 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2295 " device %s: Failing CCW: %p\n",
2296 dev_name(&device->cdev->dev),
2297 (void *) (addr_t) irb->scsw.cmd.cpa);
2298 if (irb->esw.esw0.erw.cons) {
2299 for (sl = 0; sl < 4; sl++) {
2300 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2301 " Sense(hex) %2d-%2d:",
2302 (8 * sl), ((8 * sl) + 7));
2304 for (sct = 0; sct < 8; sct++) {
2305 len += sprintf(page + len, " %02x",
2306 irb->ecw[8 * sl + sct]);
2308 len += sprintf(page + len, "\n");
2311 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
2312 /* 24 Byte Sense Data */
2313 sprintf(page + len, KERN_ERR PRINTK_HEADER
2314 " 24 Byte: %x MSG %x, "
2315 "%s MSGb to SYSOP\n",
2316 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
2317 irb->ecw[1] & 0x10 ? "" : "no");
2319 /* 32 Byte Sense Data */
2320 sprintf(page + len, KERN_ERR PRINTK_HEADER
2321 " 32 Byte: Format: %x "
2322 "Exception class %x\n",
2323 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
2326 sprintf(page + len, KERN_ERR PRINTK_HEADER
2327 " SORRY - NO VALID SENSE AVAILABLE\n");
2332 /* req == NULL for unsolicited interrupts */
2333 /* dump the Channel Program (max 140 Bytes per line) */
2334 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
2335 first = req->cpaddr;
2336 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
2337 to = min(first + 6, last);
2338 len = sprintf(page, KERN_ERR PRINTK_HEADER
2339 " Related CP in req: %p\n", req);
2340 dasd_eckd_dump_ccw_range(first, to, page + len);
2343 /* print failing CCW area (maximum 4) */
2344 /* scsw->cda is either valid or zero */
2347 fail = (struct ccw1 *)(addr_t)
2348 irb->scsw.cmd.cpa; /* failing CCW */
2349 if (from < fail - 2) {
2350 from = fail - 2; /* there is a gap - print header */
2351 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
2353 to = min(fail + 1, last);
2354 len += dasd_eckd_dump_ccw_range(from, to, page + len);
2356 /* print last CCWs (maximum 2) */
2357 from = max(from, ++to);
2358 if (from < last - 1) {
2359 from = last - 1; /* there is a gap - print header */
2360 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
2362 len += dasd_eckd_dump_ccw_range(from, last, page + len);
2366 free_page((unsigned long) page);
2370 * max_blocks is dependent on the amount of storage that is available
2371 * in the static io buffer for each device. Currently each device has
2372 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
2373 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
2374 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
2375 * addition we have one define extent ccw + 16 bytes of data and one
2376 * locate record ccw + 16 bytes of data. That makes:
2377 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
2378 * We want to fit two into the available memory so that we can immediately
2379 * start the next request if one finishes off. That makes 249.5 blocks
2380 * for one request. Give a little safety and the result is 240.
2382 static struct dasd_discipline dasd_eckd_discipline = {
2383 .owner = THIS_MODULE,
2387 .check_device = dasd_eckd_check_characteristics,
2388 .uncheck_device = dasd_eckd_uncheck_device,
2389 .do_analysis = dasd_eckd_do_analysis,
2390 .ready_to_online = dasd_eckd_ready_to_online,
2391 .online_to_ready = dasd_eckd_online_to_ready,
2392 .fill_geometry = dasd_eckd_fill_geometry,
2393 .start_IO = dasd_start_IO,
2394 .term_IO = dasd_term_IO,
2395 .handle_terminated_request = dasd_eckd_handle_terminated_request,
2396 .format_device = dasd_eckd_format_device,
2397 .erp_action = dasd_eckd_erp_action,
2398 .erp_postaction = dasd_eckd_erp_postaction,
2399 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
2400 .build_cp = dasd_eckd_build_alias_cp,
2401 .free_cp = dasd_eckd_free_alias_cp,
2402 .dump_sense = dasd_eckd_dump_sense,
2403 .fill_info = dasd_eckd_fill_info,
2404 .ioctl = dasd_eckd_ioctl,
2408 dasd_eckd_init(void)
2410 ASCEBC(dasd_eckd_discipline.ebcname, 4);
2411 return ccw_driver_register(&dasd_eckd_driver);
2415 dasd_eckd_cleanup(void)
2417 ccw_driver_unregister(&dasd_eckd_driver);
2420 module_init(dasd_eckd_init);
2421 module_exit(dasd_eckd_cleanup);