1
2
3
4
5
6
7
8
9
10
11#define KMSG_COMPONENT "cio"
12#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13
14#include <linux/module.h>
15#include <linux/slab.h>
16#include <linux/init.h>
17#include <linux/device.h>
18#include <linux/mutex.h>
19#include <linux/pci.h>
20
21#include <asm/cio.h>
22#include <asm/chpid.h>
23#include <asm/chsc.h>
24#include <asm/crw.h>
25#include <asm/isc.h>
26#include <asm/ebcdic.h>
27#include <asm/ap.h>
28
29#include "css.h"
30#include "cio.h"
31#include "cio_debug.h"
32#include "ioasm.h"
33#include "chp.h"
34#include "chsc.h"
35
36static void *sei_page;
37static void *chsc_page;
38static DEFINE_SPINLOCK(chsc_page_lock);
39
40
41
42
43
44
45
46int chsc_error_from_response(int response)
47{
48 switch (response) {
49 case 0x0001:
50 return 0;
51 case 0x0002:
52 case 0x0003:
53 case 0x0006:
54 case 0x0007:
55 case 0x0008:
56 case 0x000a:
57 case 0x0104:
58 return -EINVAL;
59 case 0x0004:
60 return -EOPNOTSUPP;
61 case 0x000b:
62 case 0x0107:
63 return -EBUSY;
64 case 0x0100:
65 case 0x0102:
66 return -ENOMEM;
67 default:
68 return -EIO;
69 }
70}
71EXPORT_SYMBOL_GPL(chsc_error_from_response);
72
73struct chsc_ssd_area {
74 struct chsc_header request;
75 u16 :10;
76 u16 ssid:2;
77 u16 :4;
78 u16 f_sch;
79 u16 :16;
80 u16 l_sch;
81 u32 :32;
82 struct chsc_header response;
83 u32 :32;
84 u8 sch_valid : 1;
85 u8 dev_valid : 1;
86 u8 st : 3;
87 u8 zeroes : 3;
88 u8 unit_addr;
89 u16 devno;
90 u8 path_mask;
91 u8 fla_valid_mask;
92 u16 sch;
93 u8 chpid[8];
94 u16 fla[8];
95} __packed __aligned(PAGE_SIZE);
96
97int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
98{
99 struct chsc_ssd_area *ssd_area;
100 unsigned long flags;
101 int ccode;
102 int ret;
103 int i;
104 int mask;
105
106 spin_lock_irqsave(&chsc_page_lock, flags);
107 memset(chsc_page, 0, PAGE_SIZE);
108 ssd_area = chsc_page;
109 ssd_area->request.length = 0x0010;
110 ssd_area->request.code = 0x0004;
111 ssd_area->ssid = schid.ssid;
112 ssd_area->f_sch = schid.sch_no;
113 ssd_area->l_sch = schid.sch_no;
114
115 ccode = chsc(ssd_area);
116
117 if (ccode > 0) {
118 ret = (ccode == 3) ? -ENODEV : -EBUSY;
119 goto out;
120 }
121 ret = chsc_error_from_response(ssd_area->response.code);
122 if (ret != 0) {
123 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
124 schid.ssid, schid.sch_no,
125 ssd_area->response.code);
126 goto out;
127 }
128 if (!ssd_area->sch_valid) {
129 ret = -ENODEV;
130 goto out;
131 }
132
133 ret = 0;
134 memset(ssd, 0, sizeof(struct chsc_ssd_info));
135 if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
136 (ssd_area->st != SUBCHANNEL_TYPE_MSG))
137 goto out;
138 ssd->path_mask = ssd_area->path_mask;
139 ssd->fla_valid_mask = ssd_area->fla_valid_mask;
140 for (i = 0; i < 8; i++) {
141 mask = 0x80 >> i;
142 if (ssd_area->path_mask & mask) {
143 chp_id_init(&ssd->chpid[i]);
144 ssd->chpid[i].id = ssd_area->chpid[i];
145 }
146 if (ssd_area->fla_valid_mask & mask)
147 ssd->fla[i] = ssd_area->fla[i];
148 }
149out:
150 spin_unlock_irqrestore(&chsc_page_lock, flags);
151 return ret;
152}
153
154
155
156
157
158
159
160
161int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd)
162{
163 memset(ssqd, 0, sizeof(*ssqd));
164 ssqd->request.length = 0x0010;
165 ssqd->request.code = 0x0024;
166 ssqd->first_sch = schid.sch_no;
167 ssqd->last_sch = schid.sch_no;
168 ssqd->ssid = schid.ssid;
169
170 if (chsc(ssqd))
171 return -EIO;
172
173 return chsc_error_from_response(ssqd->response.code);
174}
175EXPORT_SYMBOL_GPL(chsc_ssqd);
176
177
178
179
180
181
182
183
184
185
186
187int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
188 u64 summary_indicator_addr, u64 subchannel_indicator_addr, u8 isc)
189{
190 memset(scssc, 0, sizeof(*scssc));
191 scssc->request.length = 0x0fe0;
192 scssc->request.code = 0x0021;
193 scssc->operation_code = 0;
194
195 scssc->summary_indicator_addr = summary_indicator_addr;
196 scssc->subchannel_indicator_addr = subchannel_indicator_addr;
197
198 scssc->ks = PAGE_DEFAULT_KEY >> 4;
199 scssc->kc = PAGE_DEFAULT_KEY >> 4;
200 scssc->isc = isc;
201 scssc->schid = schid;
202
203
204 if (css_general_characteristics.aif_tdd)
205 scssc->word_with_d_bit = 0x10000000;
206
207 if (chsc(scssc))
208 return -EIO;
209
210 return chsc_error_from_response(scssc->response.code);
211}
212EXPORT_SYMBOL_GPL(chsc_sadc);
213
214static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
215{
216 spin_lock_irq(sch->lock);
217 if (sch->driver && sch->driver->chp_event)
218 if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0)
219 goto out_unreg;
220 spin_unlock_irq(sch->lock);
221 return 0;
222
223out_unreg:
224 sch->lpm = 0;
225 spin_unlock_irq(sch->lock);
226 css_schedule_eval(sch->schid);
227 return 0;
228}
229
230void chsc_chp_offline(struct chp_id chpid)
231{
232 struct channel_path *chp = chpid_to_chp(chpid);
233 struct chp_link link;
234 char dbf_txt[15];
235
236 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
237 CIO_TRACE_EVENT(2, dbf_txt);
238
239 if (chp_get_status(chpid) <= 0)
240 return;
241 memset(&link, 0, sizeof(struct chp_link));
242 link.chpid = chpid;
243
244 css_wait_for_slow_path();
245
246 mutex_lock(&chp->lock);
247 chp_update_desc(chp);
248 mutex_unlock(&chp->lock);
249
250 for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
251}
252
253static int __s390_process_res_acc(struct subchannel *sch, void *data)
254{
255 spin_lock_irq(sch->lock);
256 if (sch->driver && sch->driver->chp_event)
257 sch->driver->chp_event(sch, data, CHP_ONLINE);
258 spin_unlock_irq(sch->lock);
259
260 return 0;
261}
262
263static void s390_process_res_acc(struct chp_link *link)
264{
265 char dbf_txt[15];
266
267 sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
268 link->chpid.id);
269 CIO_TRACE_EVENT( 2, dbf_txt);
270 if (link->fla != 0) {
271 sprintf(dbf_txt, "fla%x", link->fla);
272 CIO_TRACE_EVENT( 2, dbf_txt);
273 }
274
275 css_wait_for_slow_path();
276
277
278
279
280
281
282
283 for_each_subchannel_staged(__s390_process_res_acc, NULL, link);
284 css_schedule_reprobe();
285}
286
287struct chsc_sei_nt0_area {
288 u8 flags;
289 u8 vf;
290 u8 rs;
291 u8 cc;
292 u16 fla;
293 u16 rsid;
294 u32 reserved1;
295 u32 reserved2;
296
297 u8 ccdf[PAGE_SIZE - 24 - 16];
298} __packed;
299
300struct chsc_sei_nt2_area {
301 u8 flags;
302 u8 reserved1;
303 u8 reserved2;
304 u8 cc;
305 u32 reserved3[13];
306 u8 ccdf[PAGE_SIZE - 24 - 56];
307} __packed;
308
309#define CHSC_SEI_NT0 (1ULL << 63)
310#define CHSC_SEI_NT2 (1ULL << 61)
311
312struct chsc_sei {
313 struct chsc_header request;
314 u32 reserved1;
315 u64 ntsm;
316 struct chsc_header response;
317 u32 :24;
318 u8 nt;
319 union {
320 struct chsc_sei_nt0_area nt0_area;
321 struct chsc_sei_nt2_area nt2_area;
322 u8 nt_area[PAGE_SIZE - 24];
323 } u;
324} __packed __aligned(PAGE_SIZE);
325
326
327
328
329
330#define LIR_IQ_CLASS_INFO 0
331#define LIR_IQ_CLASS_DEGRADED 1
332#define LIR_IQ_CLASS_NOT_OPERATIONAL 2
333
334struct lir {
335 struct {
336 u32 null:1;
337 u32 reserved:3;
338 u32 class:2;
339 u32 reserved2:2;
340 } __packed iq;
341 u32 ic:8;
342 u32 reserved:16;
343 struct node_descriptor incident_node;
344 struct node_descriptor attached_node;
345 u8 reserved2[32];
346} __packed;
347
348#define PARAMS_LEN 10
349#define NODEID_LEN 35
350
351
352static char *store_ebcdic(char *dest, const char *src, unsigned long len,
353 char delim)
354{
355 memcpy(dest, src, len);
356 EBCASC(dest, len);
357
358 if (delim)
359 dest[len++] = delim;
360
361 return dest + len;
362}
363
364
365static void format_node_data(char *params, char *id, struct node_descriptor *nd)
366{
367 memset(params, 0, PARAMS_LEN);
368 memset(id, 0, NODEID_LEN);
369
370 if (nd->validity != ND_VALIDITY_VALID) {
371 strncpy(params, "n/a", PARAMS_LEN - 1);
372 strncpy(id, "n/a", NODEID_LEN - 1);
373 return;
374 }
375
376
377 snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params);
378
379 id = store_ebcdic(id, nd->type, sizeof(nd->type), '/');
380 id = store_ebcdic(id, nd->model, sizeof(nd->model), ',');
381 id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.');
382 id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0);
383 id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ',');
384 sprintf(id, "%04X", nd->tag);
385}
386
387static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
388{
389 struct lir *lir = (struct lir *) &sei_area->ccdf;
390 char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN],
391 aunodeid[NODEID_LEN];
392
393 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n",
394 sei_area->rs, sei_area->rsid, sei_area->ccdf[0]);
395
396
397 if (lir->iq.null)
398 return;
399
400
401
402
403
404 format_node_data(iuparams, iunodeid, &lir->incident_node);
405 format_node_data(auparams, aunodeid, &lir->attached_node);
406
407 switch (lir->iq.class) {
408 case LIR_IQ_CLASS_DEGRADED:
409 pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x "
410 "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
411 sei_area->rs, sei_area->rsid, lir->ic, iuparams,
412 iunodeid, auparams, aunodeid);
413 break;
414 case LIR_IQ_CLASS_NOT_OPERATIONAL:
415 pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x "
416 "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
417 sei_area->rs, sei_area->rsid, lir->ic, iuparams,
418 iunodeid, auparams, aunodeid);
419 break;
420 default:
421 break;
422 }
423}
424
425static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
426{
427 struct channel_path *chp;
428 struct chp_link link;
429 struct chp_id chpid;
430 int status;
431
432 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
433 "rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
434 if (sei_area->rs != 4)
435 return;
436 chp_id_init(&chpid);
437 chpid.id = sei_area->rsid;
438
439 status = chp_get_status(chpid);
440 if (!status)
441 return;
442
443 if (status < 0) {
444 chp_new(chpid);
445 } else {
446 chp = chpid_to_chp(chpid);
447 mutex_lock(&chp->lock);
448 chp_update_desc(chp);
449 mutex_unlock(&chp->lock);
450 }
451 memset(&link, 0, sizeof(struct chp_link));
452 link.chpid = chpid;
453 if ((sei_area->vf & 0xc0) != 0) {
454 link.fla = sei_area->fla;
455 if ((sei_area->vf & 0xc0) == 0xc0)
456
457 link.fla_mask = 0xffff;
458 else
459
460 link.fla_mask = 0xff00;
461 }
462 s390_process_res_acc(&link);
463}
464
465static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area)
466{
467 struct channel_path *chp;
468 struct chp_id chpid;
469 u8 *data;
470 int num;
471
472 CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
473 if (sei_area->rs != 0)
474 return;
475 data = sei_area->ccdf;
476 chp_id_init(&chpid);
477 for (num = 0; num <= __MAX_CHPID; num++) {
478 if (!chp_test_bit(data, num))
479 continue;
480 chpid.id = num;
481
482 CIO_CRW_EVENT(4, "Update information for channel path "
483 "%x.%02x\n", chpid.cssid, chpid.id);
484 chp = chpid_to_chp(chpid);
485 if (!chp) {
486 chp_new(chpid);
487 continue;
488 }
489 mutex_lock(&chp->lock);
490 chp_update_desc(chp);
491 mutex_unlock(&chp->lock);
492 }
493}
494
495struct chp_config_data {
496 u8 map[32];
497 u8 op;
498 u8 pc;
499};
500
501static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area)
502{
503 struct chp_config_data *data;
504 struct chp_id chpid;
505 int num;
506 char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
507
508 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
509 if (sei_area->rs != 0)
510 return;
511 data = (struct chp_config_data *) &(sei_area->ccdf);
512 chp_id_init(&chpid);
513 for (num = 0; num <= __MAX_CHPID; num++) {
514 if (!chp_test_bit(data->map, num))
515 continue;
516 chpid.id = num;
517 pr_notice("Processing %s for channel path %x.%02x\n",
518 events[data->op], chpid.cssid, chpid.id);
519 switch (data->op) {
520 case 0:
521 chp_cfg_schedule(chpid, 1);
522 break;
523 case 1:
524 chp_cfg_schedule(chpid, 0);
525 break;
526 case 2:
527 chp_cfg_cancel_deconfigure(chpid);
528 break;
529 }
530 }
531}
532
533static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
534{
535 int ret;
536
537 CIO_CRW_EVENT(4, "chsc: scm change notification\n");
538 if (sei_area->rs != 7)
539 return;
540
541 ret = scm_update_information();
542 if (ret)
543 CIO_CRW_EVENT(0, "chsc: updating change notification"
544 " failed (rc=%d).\n", ret);
545}
546
547static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
548{
549 int ret;
550
551 CIO_CRW_EVENT(4, "chsc: scm available information\n");
552 if (sei_area->rs != 7)
553 return;
554
555 ret = scm_process_availability_information();
556 if (ret)
557 CIO_CRW_EVENT(0, "chsc: process availability information"
558 " failed (rc=%d).\n", ret);
559}
560
561static void chsc_process_sei_ap_cfg_chg(struct chsc_sei_nt0_area *sei_area)
562{
563 CIO_CRW_EVENT(3, "chsc: ap config changed\n");
564 if (sei_area->rs != 5)
565 return;
566
567 ap_bus_cfg_chg();
568}
569
570static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
571{
572 switch (sei_area->cc) {
573 case 1:
574 zpci_event_error(sei_area->ccdf);
575 break;
576 case 2:
577 zpci_event_availability(sei_area->ccdf);
578 break;
579 default:
580 CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n",
581 sei_area->cc);
582 break;
583 }
584}
585
586static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
587{
588
589 switch (sei_area->cc) {
590 case 1:
591 chsc_process_sei_link_incident(sei_area);
592 break;
593 case 2:
594 chsc_process_sei_res_acc(sei_area);
595 break;
596 case 3:
597 chsc_process_sei_ap_cfg_chg(sei_area);
598 break;
599 case 7:
600 chsc_process_sei_chp_avail(sei_area);
601 break;
602 case 8:
603 chsc_process_sei_chp_config(sei_area);
604 break;
605 case 12:
606 chsc_process_sei_scm_change(sei_area);
607 break;
608 case 14:
609 chsc_process_sei_scm_avail(sei_area);
610 break;
611 default:
612 CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
613 sei_area->cc);
614 break;
615 }
616
617
618 if (sei_area->flags & 0x40) {
619 CIO_CRW_EVENT(2, "chsc: event overflow\n");
620 css_schedule_eval_all();
621 }
622}
623
624static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
625{
626 static int ntsm_unsupported;
627
628 while (true) {
629 memset(sei, 0, sizeof(*sei));
630 sei->request.length = 0x0010;
631 sei->request.code = 0x000e;
632 if (!ntsm_unsupported)
633 sei->ntsm = ntsm;
634
635 if (chsc(sei))
636 break;
637
638 if (sei->response.code != 0x0001) {
639 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n",
640 sei->response.code, sei->ntsm);
641
642 if (sei->response.code == 3 && sei->ntsm) {
643
644 ntsm_unsupported = 1;
645 continue;
646 }
647 break;
648 }
649
650 CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
651 switch (sei->nt) {
652 case 0:
653 chsc_process_sei_nt0(&sei->u.nt0_area);
654 break;
655 case 2:
656 chsc_process_sei_nt2(&sei->u.nt2_area);
657 break;
658 default:
659 CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
660 break;
661 }
662
663 if (!(sei->u.nt0_area.flags & 0x80))
664 break;
665 }
666}
667
668
669
670
671
672
673
674
675static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
676{
677 struct chsc_sei *sei = sei_page;
678
679 if (overflow) {
680 css_schedule_eval_all();
681 return;
682 }
683 CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
684 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
685 crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
686 crw0->erc, crw0->rsid);
687
688 CIO_TRACE_EVENT(2, "prcss");
689 chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
690}
691
692void chsc_chp_online(struct chp_id chpid)
693{
694 struct channel_path *chp = chpid_to_chp(chpid);
695 struct chp_link link;
696 char dbf_txt[15];
697
698 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
699 CIO_TRACE_EVENT(2, dbf_txt);
700
701 if (chp_get_status(chpid) != 0) {
702 memset(&link, 0, sizeof(struct chp_link));
703 link.chpid = chpid;
704
705 css_wait_for_slow_path();
706
707 mutex_lock(&chp->lock);
708 chp_update_desc(chp);
709 mutex_unlock(&chp->lock);
710
711 for_each_subchannel_staged(__s390_process_res_acc, NULL,
712 &link);
713 css_schedule_reprobe();
714 }
715}
716
717static void __s390_subchannel_vary_chpid(struct subchannel *sch,
718 struct chp_id chpid, int on)
719{
720 unsigned long flags;
721 struct chp_link link;
722
723 memset(&link, 0, sizeof(struct chp_link));
724 link.chpid = chpid;
725 spin_lock_irqsave(sch->lock, flags);
726 if (sch->driver && sch->driver->chp_event)
727 sch->driver->chp_event(sch, &link,
728 on ? CHP_VARY_ON : CHP_VARY_OFF);
729 spin_unlock_irqrestore(sch->lock, flags);
730}
731
732static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
733{
734 struct chp_id *chpid = data;
735
736 __s390_subchannel_vary_chpid(sch, *chpid, 0);
737 return 0;
738}
739
740static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
741{
742 struct chp_id *chpid = data;
743
744 __s390_subchannel_vary_chpid(sch, *chpid, 1);
745 return 0;
746}
747
748
749
750
751
752
753int chsc_chp_vary(struct chp_id chpid, int on)
754{
755 struct channel_path *chp = chpid_to_chp(chpid);
756
757
758 css_wait_for_slow_path();
759
760
761
762 if (on) {
763
764 chp_update_desc(chp);
765 for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
766 NULL, &chpid);
767 css_schedule_reprobe();
768 } else
769 for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
770 NULL, &chpid);
771
772 return 0;
773}
774
775static void
776chsc_remove_cmg_attr(struct channel_subsystem *css)
777{
778 int i;
779
780 for (i = 0; i <= __MAX_CHPID; i++) {
781 if (!css->chps[i])
782 continue;
783 chp_remove_cmg_attr(css->chps[i]);
784 }
785}
786
787static int
788chsc_add_cmg_attr(struct channel_subsystem *css)
789{
790 int i, ret;
791
792 ret = 0;
793 for (i = 0; i <= __MAX_CHPID; i++) {
794 if (!css->chps[i])
795 continue;
796 ret = chp_add_cmg_attr(css->chps[i]);
797 if (ret)
798 goto cleanup;
799 }
800 return ret;
801cleanup:
802 for (--i; i >= 0; i--) {
803 if (!css->chps[i])
804 continue;
805 chp_remove_cmg_attr(css->chps[i]);
806 }
807 return ret;
808}
809
810int __chsc_do_secm(struct channel_subsystem *css, int enable)
811{
812 struct {
813 struct chsc_header request;
814 u32 operation_code : 2;
815 u32 : 30;
816 u32 key : 4;
817 u32 : 28;
818 u32 zeroes1;
819 u32 cub_addr1;
820 u32 zeroes2;
821 u32 cub_addr2;
822 u32 reserved[13];
823 struct chsc_header response;
824 u32 status : 8;
825 u32 : 4;
826 u32 fmt : 4;
827 u32 : 16;
828 } *secm_area;
829 unsigned long flags;
830 int ret, ccode;
831
832 spin_lock_irqsave(&chsc_page_lock, flags);
833 memset(chsc_page, 0, PAGE_SIZE);
834 secm_area = chsc_page;
835 secm_area->request.length = 0x0050;
836 secm_area->request.code = 0x0016;
837
838 secm_area->key = PAGE_DEFAULT_KEY >> 4;
839 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
840 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
841
842 secm_area->operation_code = enable ? 0 : 1;
843
844 ccode = chsc(secm_area);
845 if (ccode > 0) {
846 ret = (ccode == 3) ? -ENODEV : -EBUSY;
847 goto out;
848 }
849
850 switch (secm_area->response.code) {
851 case 0x0102:
852 case 0x0103:
853 ret = -EINVAL;
854 break;
855 default:
856 ret = chsc_error_from_response(secm_area->response.code);
857 }
858 if (ret != 0)
859 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
860 secm_area->response.code);
861out:
862 spin_unlock_irqrestore(&chsc_page_lock, flags);
863 return ret;
864}
865
866int
867chsc_secm(struct channel_subsystem *css, int enable)
868{
869 int ret;
870
871 if (enable && !css->cm_enabled) {
872 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
873 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
874 if (!css->cub_addr1 || !css->cub_addr2) {
875 free_page((unsigned long)css->cub_addr1);
876 free_page((unsigned long)css->cub_addr2);
877 return -ENOMEM;
878 }
879 }
880 ret = __chsc_do_secm(css, enable);
881 if (!ret) {
882 css->cm_enabled = enable;
883 if (css->cm_enabled) {
884 ret = chsc_add_cmg_attr(css);
885 if (ret) {
886 __chsc_do_secm(css, 0);
887 css->cm_enabled = 0;
888 }
889 } else
890 chsc_remove_cmg_attr(css);
891 }
892 if (!css->cm_enabled) {
893 free_page((unsigned long)css->cub_addr1);
894 free_page((unsigned long)css->cub_addr2);
895 }
896 return ret;
897}
898
899int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
900 int c, int m, void *page)
901{
902 struct chsc_scpd *scpd_area;
903 int ccode, ret;
904
905 if ((rfmt == 1 || rfmt == 0) && c == 1 &&
906 !css_general_characteristics.fcs)
907 return -EINVAL;
908 if ((rfmt == 2) && !css_general_characteristics.cib)
909 return -EINVAL;
910 if ((rfmt == 3) && !css_general_characteristics.util_str)
911 return -EINVAL;
912
913 memset(page, 0, PAGE_SIZE);
914 scpd_area = page;
915 scpd_area->request.length = 0x0010;
916 scpd_area->request.code = 0x0002;
917 scpd_area->cssid = chpid.cssid;
918 scpd_area->first_chpid = chpid.id;
919 scpd_area->last_chpid = chpid.id;
920 scpd_area->m = m;
921 scpd_area->c = c;
922 scpd_area->fmt = fmt;
923 scpd_area->rfmt = rfmt;
924
925 ccode = chsc(scpd_area);
926 if (ccode > 0)
927 return (ccode == 3) ? -ENODEV : -EBUSY;
928
929 ret = chsc_error_from_response(scpd_area->response.code);
930 if (ret)
931 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
932 scpd_area->response.code);
933 return ret;
934}
935EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
936
937#define chsc_det_chp_desc(FMT, c) \
938int chsc_determine_fmt##FMT##_channel_path_desc( \
939 struct chp_id chpid, struct channel_path_desc_fmt##FMT *desc) \
940{ \
941 struct chsc_scpd *scpd_area; \
942 unsigned long flags; \
943 int ret; \
944 \
945 spin_lock_irqsave(&chsc_page_lock, flags); \
946 scpd_area = chsc_page; \
947 ret = chsc_determine_channel_path_desc(chpid, 0, FMT, c, 0, \
948 scpd_area); \
949 if (ret) \
950 goto out; \
951 \
952 memcpy(desc, scpd_area->data, sizeof(*desc)); \
953out: \
954 spin_unlock_irqrestore(&chsc_page_lock, flags); \
955 return ret; \
956}
957
958chsc_det_chp_desc(0, 0)
959chsc_det_chp_desc(1, 1)
960chsc_det_chp_desc(3, 0)
961
962static void
963chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
964 struct cmg_chars *chars)
965{
966 int i, mask;
967
968 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
969 mask = 0x80 >> (i + 3);
970 if (cmcv & mask)
971 chp->cmg_chars.values[i] = chars->values[i];
972 else
973 chp->cmg_chars.values[i] = 0;
974 }
975}
976
977int chsc_get_channel_measurement_chars(struct channel_path *chp)
978{
979 unsigned long flags;
980 int ccode, ret;
981
982 struct {
983 struct chsc_header request;
984 u32 : 24;
985 u32 first_chpid : 8;
986 u32 : 24;
987 u32 last_chpid : 8;
988 u32 zeroes1;
989 struct chsc_header response;
990 u32 zeroes2;
991 u32 not_valid : 1;
992 u32 shared : 1;
993 u32 : 22;
994 u32 chpid : 8;
995 u32 cmcv : 5;
996 u32 : 11;
997 u32 cmgq : 8;
998 u32 cmg : 8;
999 u32 zeroes3;
1000 u32 data[NR_MEASUREMENT_CHARS];
1001 } *scmc_area;
1002
1003 chp->shared = -1;
1004 chp->cmg = -1;
1005
1006 if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm)
1007 return -EINVAL;
1008
1009 spin_lock_irqsave(&chsc_page_lock, flags);
1010 memset(chsc_page, 0, PAGE_SIZE);
1011 scmc_area = chsc_page;
1012 scmc_area->request.length = 0x0010;
1013 scmc_area->request.code = 0x0022;
1014 scmc_area->first_chpid = chp->chpid.id;
1015 scmc_area->last_chpid = chp->chpid.id;
1016
1017 ccode = chsc(scmc_area);
1018 if (ccode > 0) {
1019 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1020 goto out;
1021 }
1022
1023 ret = chsc_error_from_response(scmc_area->response.code);
1024 if (ret) {
1025 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
1026 scmc_area->response.code);
1027 goto out;
1028 }
1029 if (scmc_area->not_valid)
1030 goto out;
1031
1032 chp->cmg = scmc_area->cmg;
1033 chp->shared = scmc_area->shared;
1034 if (chp->cmg != 2 && chp->cmg != 3) {
1035
1036 goto out;
1037 }
1038 chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
1039 (struct cmg_chars *) &scmc_area->data);
1040out:
1041 spin_unlock_irqrestore(&chsc_page_lock, flags);
1042 return ret;
1043}
1044
1045int __init chsc_init(void)
1046{
1047 int ret;
1048
1049 sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
1050 chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
1051 if (!sei_page || !chsc_page) {
1052 ret = -ENOMEM;
1053 goto out_err;
1054 }
1055 ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
1056 if (ret)
1057 goto out_err;
1058 return ret;
1059out_err:
1060 free_page((unsigned long)chsc_page);
1061 free_page((unsigned long)sei_page);
1062 return ret;
1063}
1064
1065void __init chsc_init_cleanup(void)
1066{
1067 crw_unregister_handler(CRW_RSC_CSS);
1068 free_page((unsigned long)chsc_page);
1069 free_page((unsigned long)sei_page);
1070}
1071
1072int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code)
1073{
1074 int ret;
1075
1076 sda_area->request.length = 0x0400;
1077 sda_area->request.code = 0x0031;
1078 sda_area->operation_code = operation_code;
1079
1080 ret = chsc(sda_area);
1081 if (ret > 0) {
1082 ret = (ret == 3) ? -ENODEV : -EBUSY;
1083 goto out;
1084 }
1085
1086 switch (sda_area->response.code) {
1087 case 0x0101:
1088 ret = -EOPNOTSUPP;
1089 break;
1090 default:
1091 ret = chsc_error_from_response(sda_area->response.code);
1092 }
1093out:
1094 return ret;
1095}
1096
1097int chsc_enable_facility(int operation_code)
1098{
1099 struct chsc_sda_area *sda_area;
1100 unsigned long flags;
1101 int ret;
1102
1103 spin_lock_irqsave(&chsc_page_lock, flags);
1104 memset(chsc_page, 0, PAGE_SIZE);
1105 sda_area = chsc_page;
1106
1107 ret = __chsc_enable_facility(sda_area, operation_code);
1108 if (ret != 0)
1109 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
1110 operation_code, sda_area->response.code);
1111
1112 spin_unlock_irqrestore(&chsc_page_lock, flags);
1113 return ret;
1114}
1115
1116int __init chsc_get_cssid(int idx)
1117{
1118 struct {
1119 struct chsc_header request;
1120 u8 atype;
1121 u32 : 24;
1122 u32 reserved1[6];
1123 struct chsc_header response;
1124 u32 reserved2[3];
1125 struct {
1126 u8 cssid;
1127 u32 : 24;
1128 } list[0];
1129 } *sdcal_area;
1130 int ret;
1131
1132 spin_lock_irq(&chsc_page_lock);
1133 memset(chsc_page, 0, PAGE_SIZE);
1134 sdcal_area = chsc_page;
1135 sdcal_area->request.length = 0x0020;
1136 sdcal_area->request.code = 0x0034;
1137 sdcal_area->atype = 4;
1138
1139 ret = chsc(sdcal_area);
1140 if (ret) {
1141 ret = (ret == 3) ? -ENODEV : -EBUSY;
1142 goto exit;
1143 }
1144
1145 ret = chsc_error_from_response(sdcal_area->response.code);
1146 if (ret) {
1147 CIO_CRW_EVENT(2, "chsc: sdcal failed (rc=%04x)\n",
1148 sdcal_area->response.code);
1149 goto exit;
1150 }
1151
1152 if ((addr_t) &sdcal_area->list[idx] <
1153 (addr_t) &sdcal_area->response + sdcal_area->response.length)
1154 ret = sdcal_area->list[idx].cssid;
1155 else
1156 ret = -ENODEV;
1157exit:
1158 spin_unlock_irq(&chsc_page_lock);
1159 return ret;
1160}
1161
1162struct css_general_char css_general_characteristics;
1163struct css_chsc_char css_chsc_characteristics;
1164
1165int __init
1166chsc_determine_css_characteristics(void)
1167{
1168 unsigned long flags;
1169 int result;
1170 struct {
1171 struct chsc_header request;
1172 u32 reserved1;
1173 u32 reserved2;
1174 u32 reserved3;
1175 struct chsc_header response;
1176 u32 reserved4;
1177 u32 general_char[510];
1178 u32 chsc_char[508];
1179 } *scsc_area;
1180
1181 spin_lock_irqsave(&chsc_page_lock, flags);
1182 memset(chsc_page, 0, PAGE_SIZE);
1183 scsc_area = chsc_page;
1184 scsc_area->request.length = 0x0010;
1185 scsc_area->request.code = 0x0010;
1186
1187 result = chsc(scsc_area);
1188 if (result) {
1189 result = (result == 3) ? -ENODEV : -EBUSY;
1190 goto exit;
1191 }
1192
1193 result = chsc_error_from_response(scsc_area->response.code);
1194 if (result == 0) {
1195 memcpy(&css_general_characteristics, scsc_area->general_char,
1196 sizeof(css_general_characteristics));
1197 memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
1198 sizeof(css_chsc_characteristics));
1199 } else
1200 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
1201 scsc_area->response.code);
1202exit:
1203 spin_unlock_irqrestore(&chsc_page_lock, flags);
1204 return result;
1205}
1206
1207EXPORT_SYMBOL_GPL(css_general_characteristics);
1208EXPORT_SYMBOL_GPL(css_chsc_characteristics);
1209
1210int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta)
1211{
1212 struct {
1213 struct chsc_header request;
1214 unsigned int rsvd0;
1215 unsigned int op : 8;
1216 unsigned int rsvd1 : 8;
1217 unsigned int ctrl : 16;
1218 unsigned int rsvd2[5];
1219 struct chsc_header response;
1220 unsigned int rsvd3[3];
1221 u64 clock_delta;
1222 unsigned int rsvd4[2];
1223 } *rr;
1224 int rc;
1225
1226 memset(page, 0, PAGE_SIZE);
1227 rr = page;
1228 rr->request.length = 0x0020;
1229 rr->request.code = 0x0033;
1230 rr->op = op;
1231 rr->ctrl = ctrl;
1232 rc = chsc(rr);
1233 if (rc)
1234 return -EIO;
1235 rc = (rr->response.code == 0x0001) ? 0 : -EIO;
1236 if (clock_delta)
1237 *clock_delta = rr->clock_delta;
1238 return rc;
1239}
1240
1241int chsc_sstpi(void *page, void *result, size_t size)
1242{
1243 struct {
1244 struct chsc_header request;
1245 unsigned int rsvd0[3];
1246 struct chsc_header response;
1247 char data[];
1248 } *rr;
1249 int rc;
1250
1251 memset(page, 0, PAGE_SIZE);
1252 rr = page;
1253 rr->request.length = 0x0010;
1254 rr->request.code = 0x0038;
1255 rc = chsc(rr);
1256 if (rc)
1257 return -EIO;
1258 memcpy(result, &rr->data, size);
1259 return (rr->response.code == 0x0001) ? 0 : -EIO;
1260}
1261
1262int chsc_siosl(struct subchannel_id schid)
1263{
1264 struct {
1265 struct chsc_header request;
1266 u32 word1;
1267 struct subchannel_id sid;
1268 u32 word3;
1269 struct chsc_header response;
1270 u32 word[11];
1271 } *siosl_area;
1272 unsigned long flags;
1273 int ccode;
1274 int rc;
1275
1276 spin_lock_irqsave(&chsc_page_lock, flags);
1277 memset(chsc_page, 0, PAGE_SIZE);
1278 siosl_area = chsc_page;
1279 siosl_area->request.length = 0x0010;
1280 siosl_area->request.code = 0x0046;
1281 siosl_area->word1 = 0x80000000;
1282 siosl_area->sid = schid;
1283
1284 ccode = chsc(siosl_area);
1285 if (ccode > 0) {
1286 if (ccode == 3)
1287 rc = -ENODEV;
1288 else
1289 rc = -EBUSY;
1290 CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
1291 schid.ssid, schid.sch_no, ccode);
1292 goto out;
1293 }
1294 rc = chsc_error_from_response(siosl_area->response.code);
1295 if (rc)
1296 CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
1297 schid.ssid, schid.sch_no,
1298 siosl_area->response.code);
1299 else
1300 CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
1301 schid.ssid, schid.sch_no);
1302out:
1303 spin_unlock_irqrestore(&chsc_page_lock, flags);
1304 return rc;
1305}
1306EXPORT_SYMBOL_GPL(chsc_siosl);
1307
1308
1309
1310
1311
1312
1313
1314
1315int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
1316{
1317 int ccode, ret;
1318
1319 memset(scm_area, 0, sizeof(*scm_area));
1320 scm_area->request.length = 0x0020;
1321 scm_area->request.code = 0x004C;
1322 scm_area->reqtok = token;
1323
1324 ccode = chsc(scm_area);
1325 if (ccode > 0) {
1326 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1327 goto out;
1328 }
1329 ret = chsc_error_from_response(scm_area->response.code);
1330 if (ret != 0)
1331 CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",
1332 scm_area->response.code);
1333out:
1334 return ret;
1335}
1336EXPORT_SYMBOL_GPL(chsc_scm_info);
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349int chsc_pnso_brinfo(struct subchannel_id schid,
1350 struct chsc_pnso_area *brinfo_area,
1351 struct chsc_brinfo_resume_token resume_token,
1352 int cnc)
1353{
1354 memset(brinfo_area, 0, sizeof(*brinfo_area));
1355 brinfo_area->request.length = 0x0030;
1356 brinfo_area->request.code = 0x003d;
1357 brinfo_area->m = schid.m;
1358 brinfo_area->ssid = schid.ssid;
1359 brinfo_area->sch = schid.sch_no;
1360 brinfo_area->cssid = schid.cssid;
1361 brinfo_area->oc = 0;
1362 brinfo_area->resume_token = resume_token;
1363 brinfo_area->n = (cnc != 0);
1364 if (chsc(brinfo_area))
1365 return -EIO;
1366 return chsc_error_from_response(brinfo_area->response.code);
1367}
1368EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);
1369
1370int chsc_sgib(u32 origin)
1371{
1372 struct {
1373 struct chsc_header request;
1374 u16 op;
1375 u8 reserved01[2];
1376 u8 reserved02:4;
1377 u8 fmt:4;
1378 u8 reserved03[7];
1379
1380 u8 reserved04[4];
1381 u32 gib_origin;
1382 u8 reserved05[10];
1383 u8 aix;
1384 u8 reserved06[4029];
1385 struct chsc_header response;
1386 u8 reserved07[4];
1387 } *sgib_area;
1388 int ret;
1389
1390 spin_lock_irq(&chsc_page_lock);
1391 memset(chsc_page, 0, PAGE_SIZE);
1392 sgib_area = chsc_page;
1393 sgib_area->request.length = 0x0fe0;
1394 sgib_area->request.code = 0x0021;
1395 sgib_area->op = 0x1;
1396 sgib_area->gib_origin = origin;
1397
1398 ret = chsc(sgib_area);
1399 if (ret == 0)
1400 ret = chsc_error_from_response(sgib_area->response.code);
1401 spin_unlock_irq(&chsc_page_lock);
1402
1403 return ret;
1404}
1405EXPORT_SYMBOL_GPL(chsc_sgib);
1406