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11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/init.h>
14#include <linux/device.h>
15
16#include <asm/cio.h>
17#include <asm/chpid.h>
18#include <asm/chsc.h>
19
20#include "../s390mach.h"
21#include "css.h"
22#include "cio.h"
23#include "cio_debug.h"
24#include "ioasm.h"
25#include "chp.h"
26#include "chsc.h"
27
28static void *sei_page;
29
30
31
32
33
34
35
36int chsc_error_from_response(int response)
37{
38 switch (response) {
39 case 0x0001:
40 return 0;
41 case 0x0002:
42 case 0x0003:
43 case 0x0006:
44 case 0x0007:
45 case 0x0008:
46 case 0x000a:
47 return -EINVAL;
48 case 0x0004:
49 return -EOPNOTSUPP;
50 default:
51 return -EIO;
52 }
53}
54EXPORT_SYMBOL_GPL(chsc_error_from_response);
55
56struct chsc_ssd_area {
57 struct chsc_header request;
58 u16 :10;
59 u16 ssid:2;
60 u16 :4;
61 u16 f_sch;
62 u16 :16;
63 u16 l_sch;
64 u32 :32;
65 struct chsc_header response;
66 u32 :32;
67 u8 sch_valid : 1;
68 u8 dev_valid : 1;
69 u8 st : 3;
70 u8 zeroes : 3;
71 u8 unit_addr;
72 u16 devno;
73 u8 path_mask;
74 u8 fla_valid_mask;
75 u16 sch;
76 u8 chpid[8];
77 u16 fla[8];
78} __attribute__ ((packed));
79
80int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
81{
82 unsigned long page;
83 struct chsc_ssd_area *ssd_area;
84 int ccode;
85 int ret;
86 int i;
87 int mask;
88
89 page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
90 if (!page)
91 return -ENOMEM;
92 ssd_area = (struct chsc_ssd_area *) page;
93 ssd_area->request.length = 0x0010;
94 ssd_area->request.code = 0x0004;
95 ssd_area->ssid = schid.ssid;
96 ssd_area->f_sch = schid.sch_no;
97 ssd_area->l_sch = schid.sch_no;
98
99 ccode = chsc(ssd_area);
100
101 if (ccode > 0) {
102 ret = (ccode == 3) ? -ENODEV : -EBUSY;
103 goto out_free;
104 }
105 ret = chsc_error_from_response(ssd_area->response.code);
106 if (ret != 0) {
107 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
108 schid.ssid, schid.sch_no,
109 ssd_area->response.code);
110 goto out_free;
111 }
112 if (!ssd_area->sch_valid) {
113 ret = -ENODEV;
114 goto out_free;
115 }
116
117 ret = 0;
118 memset(ssd, 0, sizeof(struct chsc_ssd_info));
119 if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
120 (ssd_area->st != SUBCHANNEL_TYPE_MSG))
121 goto out_free;
122 ssd->path_mask = ssd_area->path_mask;
123 ssd->fla_valid_mask = ssd_area->fla_valid_mask;
124 for (i = 0; i < 8; i++) {
125 mask = 0x80 >> i;
126 if (ssd_area->path_mask & mask) {
127 chp_id_init(&ssd->chpid[i]);
128 ssd->chpid[i].id = ssd_area->chpid[i];
129 }
130 if (ssd_area->fla_valid_mask & mask)
131 ssd->fla[i] = ssd_area->fla[i];
132 }
133out_free:
134 free_page(page);
135 return ret;
136}
137
138static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
139{
140 spin_lock_irq(sch->lock);
141 if (sch->driver && sch->driver->chp_event)
142 if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0)
143 goto out_unreg;
144 spin_unlock_irq(sch->lock);
145 return 0;
146
147out_unreg:
148 sch->lpm = 0;
149 spin_unlock_irq(sch->lock);
150 css_schedule_eval(sch->schid);
151 return 0;
152}
153
154void chsc_chp_offline(struct chp_id chpid)
155{
156 char dbf_txt[15];
157 struct chp_link link;
158
159 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
160 CIO_TRACE_EVENT(2, dbf_txt);
161
162 if (chp_get_status(chpid) <= 0)
163 return;
164 memset(&link, 0, sizeof(struct chp_link));
165 link.chpid = chpid;
166
167 css_wait_for_slow_path();
168 for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
169}
170
171static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data)
172{
173 struct schib schib;
174
175
176
177
178
179
180
181
182 if (stsch_err(schid, &schib))
183
184 return -ENXIO;
185
186
187 css_schedule_eval(schid);
188 return 0;
189}
190
191static int __s390_process_res_acc(struct subchannel *sch, void *data)
192{
193 spin_lock_irq(sch->lock);
194 if (sch->driver && sch->driver->chp_event)
195 sch->driver->chp_event(sch, data, CHP_ONLINE);
196 spin_unlock_irq(sch->lock);
197
198 return 0;
199}
200
201static void s390_process_res_acc(struct chp_link *link)
202{
203 char dbf_txt[15];
204
205 sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
206 link->chpid.id);
207 CIO_TRACE_EVENT( 2, dbf_txt);
208 if (link->fla != 0) {
209 sprintf(dbf_txt, "fla%x", link->fla);
210 CIO_TRACE_EVENT( 2, dbf_txt);
211 }
212
213 css_wait_for_slow_path();
214
215
216
217
218
219
220
221 for_each_subchannel_staged(__s390_process_res_acc,
222 s390_process_res_acc_new_sch, link);
223}
224
225static int
226__get_chpid_from_lir(void *data)
227{
228 struct lir {
229 u8 iq;
230 u8 ic;
231 u16 sci;
232
233 u32 indesc[28];
234
235 u32 andesc[28];
236
237 u32 isinfo[28];
238 } __attribute__ ((packed)) *lir;
239
240 lir = data;
241 if (!(lir->iq&0x80))
242
243 return -EINVAL;
244 if (!(lir->indesc[0]&0xc0000000))
245
246 return -EINVAL;
247 if (!(lir->indesc[0]&0x10000000))
248
249 return -EINVAL;
250
251
252 return (u16) (lir->indesc[0]&0x000000ff);
253}
254
255struct chsc_sei_area {
256 struct chsc_header request;
257 u32 reserved1;
258 u32 reserved2;
259 u32 reserved3;
260 struct chsc_header response;
261 u32 reserved4;
262 u8 flags;
263 u8 vf;
264 u8 rs;
265 u8 cc;
266 u16 fla;
267 u16 rsid;
268 u32 reserved5;
269 u32 reserved6;
270 u8 ccdf[4096 - 16 - 24];
271
272} __attribute__ ((packed));
273
274static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
275{
276 struct chp_id chpid;
277 int id;
278
279 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
280 sei_area->rs, sei_area->rsid);
281 if (sei_area->rs != 4)
282 return;
283 id = __get_chpid_from_lir(sei_area->ccdf);
284 if (id < 0)
285 CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
286 else {
287 chp_id_init(&chpid);
288 chpid.id = id;
289 chsc_chp_offline(chpid);
290 }
291}
292
293static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
294{
295 struct chp_link link;
296 struct chp_id chpid;
297 int status;
298
299 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
300 "rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
301 if (sei_area->rs != 4)
302 return;
303 chp_id_init(&chpid);
304 chpid.id = sei_area->rsid;
305
306 status = chp_get_status(chpid);
307 if (status < 0)
308 chp_new(chpid);
309 else if (!status)
310 return;
311 memset(&link, 0, sizeof(struct chp_link));
312 link.chpid = chpid;
313 if ((sei_area->vf & 0xc0) != 0) {
314 link.fla = sei_area->fla;
315 if ((sei_area->vf & 0xc0) == 0xc0)
316
317 link.fla_mask = 0xffff;
318 else
319
320 link.fla_mask = 0xff00;
321 }
322 s390_process_res_acc(&link);
323}
324
325struct chp_config_data {
326 u8 map[32];
327 u8 op;
328 u8 pc;
329};
330
331static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
332{
333 struct chp_config_data *data;
334 struct chp_id chpid;
335 int num;
336
337 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
338 if (sei_area->rs != 0)
339 return;
340 data = (struct chp_config_data *) &(sei_area->ccdf);
341 chp_id_init(&chpid);
342 for (num = 0; num <= __MAX_CHPID; num++) {
343 if (!chp_test_bit(data->map, num))
344 continue;
345 chpid.id = num;
346 printk(KERN_WARNING "cio: processing configure event %d for "
347 "chpid %x.%02x\n", data->op, chpid.cssid, chpid.id);
348 switch (data->op) {
349 case 0:
350 chp_cfg_schedule(chpid, 1);
351 break;
352 case 1:
353 chp_cfg_schedule(chpid, 0);
354 break;
355 case 2:
356 chp_cfg_cancel_deconfigure(chpid);
357 break;
358 }
359 }
360}
361
362static void chsc_process_sei(struct chsc_sei_area *sei_area)
363{
364
365 if (sei_area->flags & 0x40) {
366 CIO_CRW_EVENT(2, "chsc: event overflow\n");
367 css_schedule_eval_all();
368 }
369
370 switch (sei_area->cc) {
371 case 1:
372 chsc_process_sei_link_incident(sei_area);
373 break;
374 case 2:
375 chsc_process_sei_res_acc(sei_area);
376 break;
377 case 8:
378 chsc_process_sei_chp_config(sei_area);
379 break;
380 default:
381 CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
382 sei_area->cc);
383 break;
384 }
385}
386
387static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
388{
389 struct chsc_sei_area *sei_area;
390
391 if (overflow) {
392 css_schedule_eval_all();
393 return;
394 }
395 CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
396 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
397 crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
398 crw0->erc, crw0->rsid);
399 if (!sei_page)
400 return;
401
402
403 sei_area = sei_page;
404
405 CIO_TRACE_EVENT(2, "prcss");
406 do {
407 memset(sei_area, 0, sizeof(*sei_area));
408 sei_area->request.length = 0x0010;
409 sei_area->request.code = 0x000e;
410 if (chsc(sei_area))
411 break;
412
413 if (sei_area->response.code == 0x0001) {
414 CIO_CRW_EVENT(4, "chsc: sei successful\n");
415 chsc_process_sei(sei_area);
416 } else {
417 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
418 sei_area->response.code);
419 break;
420 }
421 } while (sei_area->flags & 0x80);
422}
423
424void chsc_chp_online(struct chp_id chpid)
425{
426 char dbf_txt[15];
427 struct chp_link link;
428
429 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
430 CIO_TRACE_EVENT(2, dbf_txt);
431
432 if (chp_get_status(chpid) != 0) {
433 memset(&link, 0, sizeof(struct chp_link));
434 link.chpid = chpid;
435
436 css_wait_for_slow_path();
437 for_each_subchannel_staged(__s390_process_res_acc, NULL,
438 &link);
439 }
440}
441
442static void __s390_subchannel_vary_chpid(struct subchannel *sch,
443 struct chp_id chpid, int on)
444{
445 unsigned long flags;
446 struct chp_link link;
447
448 memset(&link, 0, sizeof(struct chp_link));
449 link.chpid = chpid;
450 spin_lock_irqsave(sch->lock, flags);
451 if (sch->driver && sch->driver->chp_event)
452 sch->driver->chp_event(sch, &link,
453 on ? CHP_VARY_ON : CHP_VARY_OFF);
454 spin_unlock_irqrestore(sch->lock, flags);
455}
456
457static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
458{
459 struct chp_id *chpid = data;
460
461 __s390_subchannel_vary_chpid(sch, *chpid, 0);
462 return 0;
463}
464
465static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
466{
467 struct chp_id *chpid = data;
468
469 __s390_subchannel_vary_chpid(sch, *chpid, 1);
470 return 0;
471}
472
473static int
474__s390_vary_chpid_on(struct subchannel_id schid, void *data)
475{
476 struct schib schib;
477
478 if (stsch_err(schid, &schib))
479
480 return -ENXIO;
481
482 css_schedule_eval(schid);
483 return 0;
484}
485
486
487
488
489
490
491int chsc_chp_vary(struct chp_id chpid, int on)
492{
493 struct chp_link link;
494
495 memset(&link, 0, sizeof(struct chp_link));
496 link.chpid = chpid;
497
498 css_wait_for_slow_path();
499
500
501
502
503 if (on)
504 for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
505 __s390_vary_chpid_on, &link);
506 else
507 for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
508 NULL, &link);
509
510 return 0;
511}
512
513static void
514chsc_remove_cmg_attr(struct channel_subsystem *css)
515{
516 int i;
517
518 for (i = 0; i <= __MAX_CHPID; i++) {
519 if (!css->chps[i])
520 continue;
521 chp_remove_cmg_attr(css->chps[i]);
522 }
523}
524
525static int
526chsc_add_cmg_attr(struct channel_subsystem *css)
527{
528 int i, ret;
529
530 ret = 0;
531 for (i = 0; i <= __MAX_CHPID; i++) {
532 if (!css->chps[i])
533 continue;
534 ret = chp_add_cmg_attr(css->chps[i]);
535 if (ret)
536 goto cleanup;
537 }
538 return ret;
539cleanup:
540 for (--i; i >= 0; i--) {
541 if (!css->chps[i])
542 continue;
543 chp_remove_cmg_attr(css->chps[i]);
544 }
545 return ret;
546}
547
548static int
549__chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
550{
551 struct {
552 struct chsc_header request;
553 u32 operation_code : 2;
554 u32 : 30;
555 u32 key : 4;
556 u32 : 28;
557 u32 zeroes1;
558 u32 cub_addr1;
559 u32 zeroes2;
560 u32 cub_addr2;
561 u32 reserved[13];
562 struct chsc_header response;
563 u32 status : 8;
564 u32 : 4;
565 u32 fmt : 4;
566 u32 : 16;
567 } __attribute__ ((packed)) *secm_area;
568 int ret, ccode;
569
570 secm_area = page;
571 secm_area->request.length = 0x0050;
572 secm_area->request.code = 0x0016;
573
574 secm_area->key = PAGE_DEFAULT_KEY;
575 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
576 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
577
578 secm_area->operation_code = enable ? 0 : 1;
579
580 ccode = chsc(secm_area);
581 if (ccode > 0)
582 return (ccode == 3) ? -ENODEV : -EBUSY;
583
584 switch (secm_area->response.code) {
585 case 0x0102:
586 case 0x0103:
587 ret = -EINVAL;
588 default:
589 ret = chsc_error_from_response(secm_area->response.code);
590 }
591 if (ret != 0)
592 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
593 secm_area->response.code);
594 return ret;
595}
596
597int
598chsc_secm(struct channel_subsystem *css, int enable)
599{
600 void *secm_area;
601 int ret;
602
603 secm_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
604 if (!secm_area)
605 return -ENOMEM;
606
607 if (enable && !css->cm_enabled) {
608 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
609 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
610 if (!css->cub_addr1 || !css->cub_addr2) {
611 free_page((unsigned long)css->cub_addr1);
612 free_page((unsigned long)css->cub_addr2);
613 free_page((unsigned long)secm_area);
614 return -ENOMEM;
615 }
616 }
617 ret = __chsc_do_secm(css, enable, secm_area);
618 if (!ret) {
619 css->cm_enabled = enable;
620 if (css->cm_enabled) {
621 ret = chsc_add_cmg_attr(css);
622 if (ret) {
623 memset(secm_area, 0, PAGE_SIZE);
624 __chsc_do_secm(css, 0, secm_area);
625 css->cm_enabled = 0;
626 }
627 } else
628 chsc_remove_cmg_attr(css);
629 }
630 if (!css->cm_enabled) {
631 free_page((unsigned long)css->cub_addr1);
632 free_page((unsigned long)css->cub_addr2);
633 }
634 free_page((unsigned long)secm_area);
635 return ret;
636}
637
638int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
639 int c, int m,
640 struct chsc_response_struct *resp)
641{
642 int ccode, ret;
643
644 struct {
645 struct chsc_header request;
646 u32 : 2;
647 u32 m : 1;
648 u32 c : 1;
649 u32 fmt : 4;
650 u32 cssid : 8;
651 u32 : 4;
652 u32 rfmt : 4;
653 u32 first_chpid : 8;
654 u32 : 24;
655 u32 last_chpid : 8;
656 u32 zeroes1;
657 struct chsc_header response;
658 u8 data[PAGE_SIZE - 20];
659 } __attribute__ ((packed)) *scpd_area;
660
661 if ((rfmt == 1) && !css_general_characteristics.fcs)
662 return -EINVAL;
663 if ((rfmt == 2) && !css_general_characteristics.cib)
664 return -EINVAL;
665 scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
666 if (!scpd_area)
667 return -ENOMEM;
668
669 scpd_area->request.length = 0x0010;
670 scpd_area->request.code = 0x0002;
671
672 scpd_area->cssid = chpid.cssid;
673 scpd_area->first_chpid = chpid.id;
674 scpd_area->last_chpid = chpid.id;
675 scpd_area->m = m;
676 scpd_area->c = c;
677 scpd_area->fmt = fmt;
678 scpd_area->rfmt = rfmt;
679
680 ccode = chsc(scpd_area);
681 if (ccode > 0) {
682 ret = (ccode == 3) ? -ENODEV : -EBUSY;
683 goto out;
684 }
685
686 ret = chsc_error_from_response(scpd_area->response.code);
687 if (ret == 0)
688
689 memcpy(resp, &scpd_area->response, scpd_area->response.length);
690 else
691 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
692 scpd_area->response.code);
693out:
694 free_page((unsigned long)scpd_area);
695 return ret;
696}
697EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
698
699int chsc_determine_base_channel_path_desc(struct chp_id chpid,
700 struct channel_path_desc *desc)
701{
702 struct chsc_response_struct *chsc_resp;
703 int ret;
704
705 chsc_resp = kzalloc(sizeof(*chsc_resp), GFP_KERNEL);
706 if (!chsc_resp)
707 return -ENOMEM;
708 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, chsc_resp);
709 if (ret)
710 goto out_free;
711 memcpy(desc, &chsc_resp->data, chsc_resp->length);
712out_free:
713 kfree(chsc_resp);
714 return ret;
715}
716
717static void
718chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
719 struct cmg_chars *chars)
720{
721 switch (chp->cmg) {
722 case 2:
723 case 3:
724 chp->cmg_chars = kmalloc(sizeof(struct cmg_chars),
725 GFP_KERNEL);
726 if (chp->cmg_chars) {
727 int i, mask;
728 struct cmg_chars *cmg_chars;
729
730 cmg_chars = chp->cmg_chars;
731 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
732 mask = 0x80 >> (i + 3);
733 if (cmcv & mask)
734 cmg_chars->values[i] = chars->values[i];
735 else
736 cmg_chars->values[i] = 0;
737 }
738 }
739 break;
740 default:
741
742 break;
743 }
744}
745
746int chsc_get_channel_measurement_chars(struct channel_path *chp)
747{
748 int ccode, ret;
749
750 struct {
751 struct chsc_header request;
752 u32 : 24;
753 u32 first_chpid : 8;
754 u32 : 24;
755 u32 last_chpid : 8;
756 u32 zeroes1;
757 struct chsc_header response;
758 u32 zeroes2;
759 u32 not_valid : 1;
760 u32 shared : 1;
761 u32 : 22;
762 u32 chpid : 8;
763 u32 cmcv : 5;
764 u32 : 11;
765 u32 cmgq : 8;
766 u32 cmg : 8;
767 u32 zeroes3;
768 u32 data[NR_MEASUREMENT_CHARS];
769 } __attribute__ ((packed)) *scmc_area;
770
771 scmc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
772 if (!scmc_area)
773 return -ENOMEM;
774
775 scmc_area->request.length = 0x0010;
776 scmc_area->request.code = 0x0022;
777
778 scmc_area->first_chpid = chp->chpid.id;
779 scmc_area->last_chpid = chp->chpid.id;
780
781 ccode = chsc(scmc_area);
782 if (ccode > 0) {
783 ret = (ccode == 3) ? -ENODEV : -EBUSY;
784 goto out;
785 }
786
787 ret = chsc_error_from_response(scmc_area->response.code);
788 if (ret == 0) {
789
790 if (!scmc_area->not_valid) {
791 chp->cmg = scmc_area->cmg;
792 chp->shared = scmc_area->shared;
793 chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
794 (struct cmg_chars *)
795 &scmc_area->data);
796 } else {
797 chp->cmg = -1;
798 chp->shared = -1;
799 }
800 } else {
801 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
802 scmc_area->response.code);
803 }
804out:
805 free_page((unsigned long)scmc_area);
806 return ret;
807}
808
809int __init chsc_alloc_sei_area(void)
810{
811 int ret;
812
813 sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
814 if (!sei_page) {
815 CIO_MSG_EVENT(0, "Can't allocate page for processing of "
816 "chsc machine checks!\n");
817 return -ENOMEM;
818 }
819 ret = s390_register_crw_handler(CRW_RSC_CSS, chsc_process_crw);
820 if (ret)
821 kfree(sei_page);
822 return ret;
823}
824
825void __init chsc_free_sei_area(void)
826{
827 s390_unregister_crw_handler(CRW_RSC_CSS);
828 kfree(sei_page);
829}
830
831int __init
832chsc_enable_facility(int operation_code)
833{
834 int ret;
835 struct {
836 struct chsc_header request;
837 u8 reserved1:4;
838 u8 format:4;
839 u8 reserved2;
840 u16 operation_code;
841 u32 reserved3;
842 u32 reserved4;
843 u32 operation_data_area[252];
844 struct chsc_header response;
845 u32 reserved5:4;
846 u32 format2:4;
847 u32 reserved6:24;
848 } __attribute__ ((packed)) *sda_area;
849
850 sda_area = (void *)get_zeroed_page(GFP_KERNEL|GFP_DMA);
851 if (!sda_area)
852 return -ENOMEM;
853 sda_area->request.length = 0x0400;
854 sda_area->request.code = 0x0031;
855 sda_area->operation_code = operation_code;
856
857 ret = chsc(sda_area);
858 if (ret > 0) {
859 ret = (ret == 3) ? -ENODEV : -EBUSY;
860 goto out;
861 }
862
863 switch (sda_area->response.code) {
864 case 0x0101:
865 ret = -EOPNOTSUPP;
866 break;
867 default:
868 ret = chsc_error_from_response(sda_area->response.code);
869 }
870 if (ret != 0)
871 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
872 operation_code, sda_area->response.code);
873 out:
874 free_page((unsigned long)sda_area);
875 return ret;
876}
877
878struct css_general_char css_general_characteristics;
879struct css_chsc_char css_chsc_characteristics;
880
881int __init
882chsc_determine_css_characteristics(void)
883{
884 int result;
885 struct {
886 struct chsc_header request;
887 u32 reserved1;
888 u32 reserved2;
889 u32 reserved3;
890 struct chsc_header response;
891 u32 reserved4;
892 u32 general_char[510];
893 u32 chsc_char[518];
894 } __attribute__ ((packed)) *scsc_area;
895
896 scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
897 if (!scsc_area)
898 return -ENOMEM;
899
900 scsc_area->request.length = 0x0010;
901 scsc_area->request.code = 0x0010;
902
903 result = chsc(scsc_area);
904 if (result) {
905 result = (result == 3) ? -ENODEV : -EBUSY;
906 goto exit;
907 }
908
909 result = chsc_error_from_response(scsc_area->response.code);
910 if (result == 0) {
911 memcpy(&css_general_characteristics, scsc_area->general_char,
912 sizeof(css_general_characteristics));
913 memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
914 sizeof(css_chsc_characteristics));
915 } else
916 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
917 scsc_area->response.code);
918exit:
919 free_page ((unsigned long) scsc_area);
920 return result;
921}
922
923EXPORT_SYMBOL_GPL(css_general_characteristics);
924EXPORT_SYMBOL_GPL(css_chsc_characteristics);
925
926int chsc_sstpc(void *page, unsigned int op, u16 ctrl)
927{
928 struct {
929 struct chsc_header request;
930 unsigned int rsvd0;
931 unsigned int op : 8;
932 unsigned int rsvd1 : 8;
933 unsigned int ctrl : 16;
934 unsigned int rsvd2[5];
935 struct chsc_header response;
936 unsigned int rsvd3[7];
937 } __attribute__ ((packed)) *rr;
938 int rc;
939
940 memset(page, 0, PAGE_SIZE);
941 rr = page;
942 rr->request.length = 0x0020;
943 rr->request.code = 0x0033;
944 rr->op = op;
945 rr->ctrl = ctrl;
946 rc = chsc(rr);
947 if (rc)
948 return -EIO;
949 rc = (rr->response.code == 0x0001) ? 0 : -EIO;
950 return rc;
951}
952
953int chsc_sstpi(void *page, void *result, size_t size)
954{
955 struct {
956 struct chsc_header request;
957 unsigned int rsvd0[3];
958 struct chsc_header response;
959 char data[size];
960 } __attribute__ ((packed)) *rr;
961 int rc;
962
963 memset(page, 0, PAGE_SIZE);
964 rr = page;
965 rr->request.length = 0x0010;
966 rr->request.code = 0x0038;
967 rc = chsc(rr);
968 if (rc)
969 return -EIO;
970 memcpy(result, &rr->data, size);
971 return (rr->response.code == 0x0001) ? 0 : -EIO;
972}
973
974
