?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
staging: rtl8188eu: rename HalSetBrateCfg() - style
[linux/fpc-iii.git] / drivers / s390 / cio / chsc.c
bloba0baee25134c0cd0b6a6e35df694ae763a4b0a21
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * S/390 common I/O routines -- channel subsystem call
4 *
5 * Copyright IBM Corp. 1999,2012
6 * Author(s): Ingo Adlung (adlung@de.ibm.com)
7 * Cornelia Huck (cornelia.huck@de.ibm.com)
8 * Arnd Bergmann (arndb@de.ibm.com)
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
28 #include "css.h"
29 #include "cio.h"
30 #include "cio_debug.h"
31 #include "ioasm.h"
32 #include "chp.h"
33 #include "chsc.h"
34
35 static void *sei_page;
36 static void *chsc_page;
37 static DEFINE_SPINLOCK(chsc_page_lock);
38
39 /**
40 * chsc_error_from_response() - convert a chsc response to an error
41 * @response: chsc response code
42 *
43 * Returns an appropriate Linux error code for @response.
44 */
45 int chsc_error_from_response(int response)
46 {
47 switch (response) {
48 case 0x0001:
49 return 0;
50 case 0x0002:
51 case 0x0003:
52 case 0x0006:
53 case 0x0007:
54 case 0x0008:
55 case 0x000a:
56 case 0x0104:
57 return -EINVAL;
58 case 0x0004:
59 return -EOPNOTSUPP;
60 case 0x000b:
61 case 0x0107: /* "Channel busy" for the op 0x003d */
62 return -EBUSY;
63 case 0x0100:
64 case 0x0102:
65 return -ENOMEM;
66 default:
67 return -EIO;
68 }
69 }
70 EXPORT_SYMBOL_GPL(chsc_error_from_response);
71
72 struct chsc_ssd_area {
73 struct chsc_header request;
74 u16 :10;
75 u16 ssid:2;
76 u16 :4;
77 u16 f_sch; /* first subchannel */
78 u16 :16;
79 u16 l_sch; /* last subchannel */
80 u32 :32;
81 struct chsc_header response;
82 u32 :32;
83 u8 sch_valid : 1;
84 u8 dev_valid : 1;
85 u8 st : 3; /* subchannel type */
86 u8 zeroes : 3;
87 u8 unit_addr; /* unit address */
88 u16 devno; /* device number */
89 u8 path_mask;
90 u8 fla_valid_mask;
91 u16 sch; /* subchannel */
92 u8 chpid[8]; /* chpids 0-7 */
93 u16 fla[8]; /* full link addresses 0-7 */
94 } __packed __aligned(PAGE_SIZE);
95
96 int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
97 {
98 struct chsc_ssd_area *ssd_area;
99 unsigned long flags;
100 int ccode;
101 int ret;
102 int i;
103 int mask;
104
105 spin_lock_irqsave(&chsc_page_lock, flags);
106 memset(chsc_page, 0, PAGE_SIZE);
107 ssd_area = chsc_page;
108 ssd_area->request.length = 0x0010;
109 ssd_area->request.code = 0x0004;
110 ssd_area->ssid = schid.ssid;
111 ssd_area->f_sch = schid.sch_no;
112 ssd_area->l_sch = schid.sch_no;
113
114 ccode = chsc(ssd_area);
115 /* Check response. */
116 if (ccode > 0) {
117 ret = (ccode == 3) ? -ENODEV : -EBUSY;
118 goto out;
119 }
120 ret = chsc_error_from_response(ssd_area->response.code);
121 if (ret != 0) {
122 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
123 schid.ssid, schid.sch_no,
124 ssd_area->response.code);
125 goto out;
126 }
127 if (!ssd_area->sch_valid) {
128 ret = -ENODEV;
129 goto out;
130 }
131 /* Copy data */
132 ret = 0;
133 memset(ssd, 0, sizeof(struct chsc_ssd_info));
134 if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
135 (ssd_area->st != SUBCHANNEL_TYPE_MSG))
136 goto out;
137 ssd->path_mask = ssd_area->path_mask;
138 ssd->fla_valid_mask = ssd_area->fla_valid_mask;
139 for (i = 0; i < 8; i++) {
140 mask = 0x80 >> i;
141 if (ssd_area->path_mask & mask) {
142 chp_id_init(&ssd->chpid[i]);
143 ssd->chpid[i].id = ssd_area->chpid[i];
144 }
145 if (ssd_area->fla_valid_mask & mask)
146 ssd->fla[i] = ssd_area->fla[i];
147 }
148 out:
149 spin_unlock_irqrestore(&chsc_page_lock, flags);
150 return ret;
151 }
152
153 /**
154 * chsc_ssqd() - store subchannel QDIO data (SSQD)
155 * @schid: id of the subchannel on which SSQD is performed
156 * @ssqd: request and response block for SSQD
157 *
158 * Returns 0 on success.
159 */
160 int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd)
161 {
162 memset(ssqd, 0, sizeof(*ssqd));
163 ssqd->request.length = 0x0010;
164 ssqd->request.code = 0x0024;
165 ssqd->first_sch = schid.sch_no;
166 ssqd->last_sch = schid.sch_no;
167 ssqd->ssid = schid.ssid;
168
169 if (chsc(ssqd))
170 return -EIO;
171
172 return chsc_error_from_response(ssqd->response.code);
173 }
174 EXPORT_SYMBOL_GPL(chsc_ssqd);
175
176 /**
177 * chsc_sadc() - set adapter device controls (SADC)
178 * @schid: id of the subchannel on which SADC is performed
179 * @scssc: request and response block for SADC
180 * @summary_indicator_addr: summary indicator address
181 * @subchannel_indicator_addr: subchannel indicator address
182 *
183 * Returns 0 on success.
184 */
185 int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
186 u64 summary_indicator_addr, u64 subchannel_indicator_addr)
187 {
188 memset(scssc, 0, sizeof(*scssc));
189 scssc->request.length = 0x0fe0;
190 scssc->request.code = 0x0021;
191 scssc->operation_code = 0;
192
193 scssc->summary_indicator_addr = summary_indicator_addr;
194 scssc->subchannel_indicator_addr = subchannel_indicator_addr;
195
196 scssc->ks = PAGE_DEFAULT_KEY >> 4;
197 scssc->kc = PAGE_DEFAULT_KEY >> 4;
198 scssc->isc = QDIO_AIRQ_ISC;
199 scssc->schid = schid;
200
201 /* enable the time delay disablement facility */
202 if (css_general_characteristics.aif_tdd)
203 scssc->word_with_d_bit = 0x10000000;
204
205 if (chsc(scssc))
206 return -EIO;
207
208 return chsc_error_from_response(scssc->response.code);
209 }
210 EXPORT_SYMBOL_GPL(chsc_sadc);
211
212 static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
213 {
214 spin_lock_irq(sch->lock);
215 if (sch->driver && sch->driver->chp_event)
216 if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0)
217 goto out_unreg;
218 spin_unlock_irq(sch->lock);
219 return 0;
220
221 out_unreg:
222 sch->lpm = 0;
223 spin_unlock_irq(sch->lock);
224 css_schedule_eval(sch->schid);
225 return 0;
226 }
227
228 void chsc_chp_offline(struct chp_id chpid)
229 {
230 struct channel_path *chp = chpid_to_chp(chpid);
231 struct chp_link link;
232 char dbf_txt[15];
233
234 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
235 CIO_TRACE_EVENT(2, dbf_txt);
236
237 if (chp_get_status(chpid) <= 0)
238 return;
239 memset(&link, 0, sizeof(struct chp_link));
240 link.chpid = chpid;
241 /* Wait until previous actions have settled. */
242 css_wait_for_slow_path();
243
244 mutex_lock(&chp->lock);
245 chp_update_desc(chp);
246 mutex_unlock(&chp->lock);
247
248 for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
249 }
250
251 static int __s390_process_res_acc(struct subchannel *sch, void *data)
252 {
253 spin_lock_irq(sch->lock);
254 if (sch->driver && sch->driver->chp_event)
255 sch->driver->chp_event(sch, data, CHP_ONLINE);
256 spin_unlock_irq(sch->lock);
257
258 return 0;
259 }
260
261 static void s390_process_res_acc(struct chp_link *link)
262 {
263 char dbf_txt[15];
264
265 sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
266 link->chpid.id);
267 CIO_TRACE_EVENT( 2, dbf_txt);
268 if (link->fla != 0) {
269 sprintf(dbf_txt, "fla%x", link->fla);
270 CIO_TRACE_EVENT( 2, dbf_txt);
271 }
272 /* Wait until previous actions have settled. */
273 css_wait_for_slow_path();
274 /*
275 * I/O resources may have become accessible.
276 * Scan through all subchannels that may be concerned and
277 * do a validation on those.
278 * The more information we have (info), the less scanning
279 * will we have to do.
280 */
281 for_each_subchannel_staged(__s390_process_res_acc, NULL, link);
282 css_schedule_reprobe();
283 }
284
285 struct chsc_sei_nt0_area {
286 u8 flags;
287 u8 vf; /* validity flags */
288 u8 rs; /* reporting source */
289 u8 cc; /* content code */
290 u16 fla; /* full link address */
291 u16 rsid; /* reporting source id */
292 u32 reserved1;
293 u32 reserved2;
294 /* ccdf has to be big enough for a link-incident record */
295 u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */
296 } __packed;
297
298 struct chsc_sei_nt2_area {
299 u8 flags; /* p and v bit */
300 u8 reserved1;
301 u8 reserved2;
302 u8 cc; /* content code */
303 u32 reserved3[13];
304 u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */
305 } __packed;
306
307 #define CHSC_SEI_NT0 (1ULL << 63)
308 #define CHSC_SEI_NT2 (1ULL << 61)
309
310 struct chsc_sei {
311 struct chsc_header request;
312 u32 reserved1;
313 u64 ntsm; /* notification type mask */
314 struct chsc_header response;
315 u32 :24;
316 u8 nt;
317 union {
318 struct chsc_sei_nt0_area nt0_area;
319 struct chsc_sei_nt2_area nt2_area;
320 u8 nt_area[PAGE_SIZE - 24];
321 } u;
322 } __packed __aligned(PAGE_SIZE);
323
324 /*
325 * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands"
326 */
327
328 #define ND_VALIDITY_VALID 0
329 #define ND_VALIDITY_OUTDATED 1
330 #define ND_VALIDITY_INVALID 2
331
332 struct node_descriptor {
333 /* Flags. */
334 union {
335 struct {
336 u32 validity:3;
337 u32 reserved:5;
338 } __packed;
339 u8 byte0;
340 } __packed;
341
342 /* Node parameters. */
343 u32 params:24;
344
345 /* Node ID. */
346 char type[6];
347 char model[3];
348 char manufacturer[3];
349 char plant[2];
350 char seq[12];
351 u16 tag;
352 } __packed;
353
354 /*
355 * Link Incident Record as defined in SA22-7202, "ESCON I/O Interface"
356 */
357
358 #define LIR_IQ_CLASS_INFO 0
359 #define LIR_IQ_CLASS_DEGRADED 1
360 #define LIR_IQ_CLASS_NOT_OPERATIONAL 2
361
362 struct lir {
363 struct {
364 u32 null:1;
365 u32 reserved:3;
366 u32 class:2;
367 u32 reserved2:2;
368 } __packed iq;
369 u32 ic:8;
370 u32 reserved:16;
371 struct node_descriptor incident_node;
372 struct node_descriptor attached_node;
373 u8 reserved2[32];
374 } __packed;
375
376 #define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */
377 #define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
378
379 /* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */
380 static char *store_ebcdic(char *dest, const char *src, unsigned long len,
381 char delim)
382 {
383 memcpy(dest, src, len);
384 EBCASC(dest, len);
385
386 if (delim)
387 dest[len++] = delim;
388
389 return dest + len;
390 }
391
392 /* Format node ID and parameters for output in LIR log message. */
393 static void format_node_data(char *params, char *id, struct node_descriptor *nd)
394 {
395 memset(params, 0, PARAMS_LEN);
396 memset(id, 0, NODEID_LEN);
397
398 if (nd->validity != ND_VALIDITY_VALID) {
399 strncpy(params, "n/a", PARAMS_LEN - 1);
400 strncpy(id, "n/a", NODEID_LEN - 1);
401 return;
402 }
403
404 /* PARAMS=xx,xxxxxx */
405 snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params);
406 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
407 id = store_ebcdic(id, nd->type, sizeof(nd->type), '/');
408 id = store_ebcdic(id, nd->model, sizeof(nd->model), ',');
409 id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.');
410 id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0);
411 id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ',');
412 sprintf(id, "%04X", nd->tag);
413 }
414
415 static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
416 {
417 struct lir *lir = (struct lir *) &sei_area->ccdf;
418 char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN],
419 aunodeid[NODEID_LEN];
420
421 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n",
422 sei_area->rs, sei_area->rsid, sei_area->ccdf[0]);
423
424 /* Ignore NULL Link Incident Records. */
425 if (lir->iq.null)
426 return;
427
428 /* Inform user that a link requires maintenance actions because it has
429 * become degraded or not operational. Note that this log message is
430 * the primary intention behind a Link Incident Record. */
431
432 format_node_data(iuparams, iunodeid, &lir->incident_node);
433 format_node_data(auparams, aunodeid, &lir->attached_node);
434
435 switch (lir->iq.class) {
436 case LIR_IQ_CLASS_DEGRADED:
437 pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x "
438 "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
439 sei_area->rs, sei_area->rsid, lir->ic, iuparams,
440 iunodeid, auparams, aunodeid);
441 break;
442 case LIR_IQ_CLASS_NOT_OPERATIONAL:
443 pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x "
444 "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
445 sei_area->rs, sei_area->rsid, lir->ic, iuparams,
446 iunodeid, auparams, aunodeid);
447 break;
448 default:
449 break;
450 }
451 }
452
453 static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
454 {
455 struct channel_path *chp;
456 struct chp_link link;
457 struct chp_id chpid;
458 int status;
459
460 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
461 "rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
462 if (sei_area->rs != 4)
463 return;
464 chp_id_init(&chpid);
465 chpid.id = sei_area->rsid;
466 /* allocate a new channel path structure, if needed */
467 status = chp_get_status(chpid);
468 if (!status)
469 return;
470
471 if (status < 0) {
472 chp_new(chpid);
473 } else {
474 chp = chpid_to_chp(chpid);
475 mutex_lock(&chp->lock);
476 chp_update_desc(chp);
477 mutex_unlock(&chp->lock);
478 }
479 memset(&link, 0, sizeof(struct chp_link));
480 link.chpid = chpid;
481 if ((sei_area->vf & 0xc0) != 0) {
482 link.fla = sei_area->fla;
483 if ((sei_area->vf & 0xc0) == 0xc0)
484 /* full link address */
485 link.fla_mask = 0xffff;
486 else
487 /* link address */
488 link.fla_mask = 0xff00;
489 }
490 s390_process_res_acc(&link);
491 }
492
493 static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area)
494 {
495 struct channel_path *chp;
496 struct chp_id chpid;
497 u8 *data;
498 int num;
499
500 CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
501 if (sei_area->rs != 0)
502 return;
503 data = sei_area->ccdf;
504 chp_id_init(&chpid);
505 for (num = 0; num <= __MAX_CHPID; num++) {
506 if (!chp_test_bit(data, num))
507 continue;
508 chpid.id = num;
509
510 CIO_CRW_EVENT(4, "Update information for channel path "
511 "%x.%02x\n", chpid.cssid, chpid.id);
512 chp = chpid_to_chp(chpid);
513 if (!chp) {
514 chp_new(chpid);
515 continue;
516 }
517 mutex_lock(&chp->lock);
518 chp_update_desc(chp);
519 mutex_unlock(&chp->lock);
520 }
521 }
522
523 struct chp_config_data {
524 u8 map[32];
525 u8 op;
526 u8 pc;
527 };
528
529 static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area)
530 {
531 struct chp_config_data *data;
532 struct chp_id chpid;
533 int num;
534 char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
535
536 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
537 if (sei_area->rs != 0)
538 return;
539 data = (struct chp_config_data *) &(sei_area->ccdf);
540 chp_id_init(&chpid);
541 for (num = 0; num <= __MAX_CHPID; num++) {
542 if (!chp_test_bit(data->map, num))
543 continue;
544 chpid.id = num;
545 pr_notice("Processing %s for channel path %x.%02x\n",
546 events[data->op], chpid.cssid, chpid.id);
547 switch (data->op) {
548 case 0:
549 chp_cfg_schedule(chpid, 1);
550 break;
551 case 1:
552 chp_cfg_schedule(chpid, 0);
553 break;
554 case 2:
555 chp_cfg_cancel_deconfigure(chpid);
556 break;
557 }
558 }
559 }
560
561 static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
562 {
563 int ret;
564
565 CIO_CRW_EVENT(4, "chsc: scm change notification\n");
566 if (sei_area->rs != 7)
567 return;
568
569 ret = scm_update_information();
570 if (ret)
571 CIO_CRW_EVENT(0, "chsc: updating change notification"
572 " failed (rc=%d).\n", ret);
573 }
574
575 static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
576 {
577 int ret;
578
579 CIO_CRW_EVENT(4, "chsc: scm available information\n");
580 if (sei_area->rs != 7)
581 return;
582
583 ret = scm_process_availability_information();
584 if (ret)
585 CIO_CRW_EVENT(0, "chsc: process availability information"
586 " failed (rc=%d).\n", ret);
587 }
588
589 static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
590 {
591 switch (sei_area->cc) {
592 case 1:
593 zpci_event_error(sei_area->ccdf);
594 break;
595 case 2:
596 zpci_event_availability(sei_area->ccdf);
597 break;
598 default:
599 CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n",
600 sei_area->cc);
601 break;
602 }
603 }
604
605 static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
606 {
607 /* which kind of information was stored? */
608 switch (sei_area->cc) {
609 case 1: /* link incident*/
610 chsc_process_sei_link_incident(sei_area);
611 break;
612 case 2: /* i/o resource accessibility */
613 chsc_process_sei_res_acc(sei_area);
614 break;
615 case 7: /* channel-path-availability information */
616 chsc_process_sei_chp_avail(sei_area);
617 break;
618 case 8: /* channel-path-configuration notification */
619 chsc_process_sei_chp_config(sei_area);
620 break;
621 case 12: /* scm change notification */
622 chsc_process_sei_scm_change(sei_area);
623 break;
624 case 14: /* scm available notification */
625 chsc_process_sei_scm_avail(sei_area);
626 break;
627 default: /* other stuff */
628 CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
629 sei_area->cc);
630 break;
631 }
632
633 /* Check if we might have lost some information. */
634 if (sei_area->flags & 0x40) {
635 CIO_CRW_EVENT(2, "chsc: event overflow\n");
636 css_schedule_eval_all();
637 }
638 }
639
640 static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
641 {
642 static int ntsm_unsupported;
643
644 while (true) {
645 memset(sei, 0, sizeof(*sei));
646 sei->request.length = 0x0010;
647 sei->request.code = 0x000e;
648 if (!ntsm_unsupported)
649 sei->ntsm = ntsm;
650
651 if (chsc(sei))
652 break;
653
654 if (sei->response.code != 0x0001) {
655 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n",
656 sei->response.code, sei->ntsm);
657
658 if (sei->response.code == 3 && sei->ntsm) {
659 /* Fallback for old firmware. */
660 ntsm_unsupported = 1;
661 continue;
662 }
663 break;
664 }
665
666 CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
667 switch (sei->nt) {
668 case 0:
669 chsc_process_sei_nt0(&sei->u.nt0_area);
670 break;
671 case 2:
672 chsc_process_sei_nt2(&sei->u.nt2_area);
673 break;
674 default:
675 CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
676 break;
677 }
678
679 if (!(sei->u.nt0_area.flags & 0x80))
680 break;
681 }
682 }
683
684 /*
685 * Handle channel subsystem related CRWs.
686 * Use store event information to find out what's going on.
687 *
688 * Note: Access to sei_page is serialized through machine check handler
689 * thread, so no need for locking.
690 */
691 static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
692 {
693 struct chsc_sei *sei = sei_page;
694
695 if (overflow) {
696 css_schedule_eval_all();
697 return;
698 }
699 CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
700 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
701 crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
702 crw0->erc, crw0->rsid);
703
704 CIO_TRACE_EVENT(2, "prcss");
705 chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
706 }
707
708 void chsc_chp_online(struct chp_id chpid)
709 {
710 struct channel_path *chp = chpid_to_chp(chpid);
711 struct chp_link link;
712 char dbf_txt[15];
713
714 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
715 CIO_TRACE_EVENT(2, dbf_txt);
716
717 if (chp_get_status(chpid) != 0) {
718 memset(&link, 0, sizeof(struct chp_link));
719 link.chpid = chpid;
720 /* Wait until previous actions have settled. */
721 css_wait_for_slow_path();
722
723 mutex_lock(&chp->lock);
724 chp_update_desc(chp);
725 mutex_unlock(&chp->lock);
726
727 for_each_subchannel_staged(__s390_process_res_acc, NULL,
728 &link);
729 css_schedule_reprobe();
730 }
731 }
732
733 static void __s390_subchannel_vary_chpid(struct subchannel *sch,
734 struct chp_id chpid, int on)
735 {
736 unsigned long flags;
737 struct chp_link link;
738
739 memset(&link, 0, sizeof(struct chp_link));
740 link.chpid = chpid;
741 spin_lock_irqsave(sch->lock, flags);
742 if (sch->driver && sch->driver->chp_event)
743 sch->driver->chp_event(sch, &link,
744 on ? CHP_VARY_ON : CHP_VARY_OFF);
745 spin_unlock_irqrestore(sch->lock, flags);
746 }
747
748 static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
749 {
750 struct chp_id *chpid = data;
751
752 __s390_subchannel_vary_chpid(sch, *chpid, 0);
753 return 0;
754 }
755
756 static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
757 {
758 struct chp_id *chpid = data;
759
760 __s390_subchannel_vary_chpid(sch, *chpid, 1);
761 return 0;
762 }
763
764 /**
765 * chsc_chp_vary - propagate channel-path vary operation to subchannels
766 * @chpid: channl-path ID
767 * @on: non-zero for vary online, zero for vary offline
768 */
769 int chsc_chp_vary(struct chp_id chpid, int on)
770 {
771 struct channel_path *chp = chpid_to_chp(chpid);
772
773 /* Wait until previous actions have settled. */
774 css_wait_for_slow_path();
775 /*
776 * Redo PathVerification on the devices the chpid connects to
777 */
778 if (on) {
779 /* Try to update the channel path description. */
780 chp_update_desc(chp);
781 for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
782 NULL, &chpid);
783 css_schedule_reprobe();
784 } else
785 for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
786 NULL, &chpid);
787
788 return 0;
789 }
790
791 static void
792 chsc_remove_cmg_attr(struct channel_subsystem *css)
793 {
794 int i;
795
796 for (i = 0; i <= __MAX_CHPID; i++) {
797 if (!css->chps[i])
798 continue;
799 chp_remove_cmg_attr(css->chps[i]);
800 }
801 }
802
803 static int
804 chsc_add_cmg_attr(struct channel_subsystem *css)
805 {
806 int i, ret;
807
808 ret = 0;
809 for (i = 0; i <= __MAX_CHPID; i++) {
810 if (!css->chps[i])
811 continue;
812 ret = chp_add_cmg_attr(css->chps[i]);
813 if (ret)
814 goto cleanup;
815 }
816 return ret;
817 cleanup:
818 for (--i; i >= 0; i--) {
819 if (!css->chps[i])
820 continue;
821 chp_remove_cmg_attr(css->chps[i]);
822 }
823 return ret;
824 }
825
826 int __chsc_do_secm(struct channel_subsystem *css, int enable)
827 {
828 struct {
829 struct chsc_header request;
830 u32 operation_code : 2;
831 u32 : 30;
832 u32 key : 4;
833 u32 : 28;
834 u32 zeroes1;
835 u32 cub_addr1;
836 u32 zeroes2;
837 u32 cub_addr2;
838 u32 reserved[13];
839 struct chsc_header response;
840 u32 status : 8;
841 u32 : 4;
842 u32 fmt : 4;
843 u32 : 16;
844 } *secm_area;
845 unsigned long flags;
846 int ret, ccode;
847
848 spin_lock_irqsave(&chsc_page_lock, flags);
849 memset(chsc_page, 0, PAGE_SIZE);
850 secm_area = chsc_page;
851 secm_area->request.length = 0x0050;
852 secm_area->request.code = 0x0016;
853
854 secm_area->key = PAGE_DEFAULT_KEY >> 4;
855 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
856 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
857
858 secm_area->operation_code = enable ? 0 : 1;
859
860 ccode = chsc(secm_area);
861 if (ccode > 0) {
862 ret = (ccode == 3) ? -ENODEV : -EBUSY;
863 goto out;
864 }
865
866 switch (secm_area->response.code) {
867 case 0x0102:
868 case 0x0103:
869 ret = -EINVAL;
870 break;
871 default:
872 ret = chsc_error_from_response(secm_area->response.code);
873 }
874 if (ret != 0)
875 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
876 secm_area->response.code);
877 out:
878 spin_unlock_irqrestore(&chsc_page_lock, flags);
879 return ret;
880 }
881
882 int
883 chsc_secm(struct channel_subsystem *css, int enable)
884 {
885 int ret;
886
887 if (enable && !css->cm_enabled) {
888 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
889 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
890 if (!css->cub_addr1 || !css->cub_addr2) {
891 free_page((unsigned long)css->cub_addr1);
892 free_page((unsigned long)css->cub_addr2);
893 return -ENOMEM;
894 }
895 }
896 ret = __chsc_do_secm(css, enable);
897 if (!ret) {
898 css->cm_enabled = enable;
899 if (css->cm_enabled) {
900 ret = chsc_add_cmg_attr(css);
901 if (ret) {
902 __chsc_do_secm(css, 0);
903 css->cm_enabled = 0;
904 }
905 } else
906 chsc_remove_cmg_attr(css);
907 }
908 if (!css->cm_enabled) {
909 free_page((unsigned long)css->cub_addr1);
910 free_page((unsigned long)css->cub_addr2);
911 }
912 return ret;
913 }
914
915 int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
916 int c, int m, void *page)
917 {
918 struct chsc_scpd *scpd_area;
919 int ccode, ret;
920
921 if ((rfmt == 1 || rfmt == 0) && c == 1 &&
922 !css_general_characteristics.fcs)
923 return -EINVAL;
924 if ((rfmt == 2) && !css_general_characteristics.cib)
925 return -EINVAL;
926 if ((rfmt == 3) && !css_general_characteristics.util_str)
927 return -EINVAL;
928
929 memset(page, 0, PAGE_SIZE);
930 scpd_area = page;
931 scpd_area->request.length = 0x0010;
932 scpd_area->request.code = 0x0002;
933 scpd_area->cssid = chpid.cssid;
934 scpd_area->first_chpid = chpid.id;
935 scpd_area->last_chpid = chpid.id;
936 scpd_area->m = m;
937 scpd_area->c = c;
938 scpd_area->fmt = fmt;
939 scpd_area->rfmt = rfmt;
940
941 ccode = chsc(scpd_area);
942 if (ccode > 0)
943 return (ccode == 3) ? -ENODEV : -EBUSY;
944
945 ret = chsc_error_from_response(scpd_area->response.code);
946 if (ret)
947 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
948 scpd_area->response.code);
949 return ret;
950 }
951 EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
952
953 #define chsc_det_chp_desc(FMT, c) \
954 int chsc_determine_fmt##FMT##_channel_path_desc( \
955 struct chp_id chpid, struct channel_path_desc_fmt##FMT *desc) \
956 { \
957 struct chsc_scpd *scpd_area; \
958 unsigned long flags; \
959 int ret; \
960 \
961 spin_lock_irqsave(&chsc_page_lock, flags); \
962 scpd_area = chsc_page; \
963 ret = chsc_determine_channel_path_desc(chpid, 0, FMT, c, 0, \
964 scpd_area); \
965 if (ret) \
966 goto out; \
967 \
968 memcpy(desc, scpd_area->data, sizeof(*desc)); \
969 out: \
970 spin_unlock_irqrestore(&chsc_page_lock, flags); \
971 return ret; \
972 }
973
974 chsc_det_chp_desc(0, 0)
975 chsc_det_chp_desc(1, 1)
976 chsc_det_chp_desc(3, 0)
977
978 static void
979 chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
980 struct cmg_chars *chars)
981 {
982 int i, mask;
983
984 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
985 mask = 0x80 >> (i + 3);
986 if (cmcv & mask)
987 chp->cmg_chars.values[i] = chars->values[i];
988 else
989 chp->cmg_chars.values[i] = 0;
990 }
991 }
992
993 int chsc_get_channel_measurement_chars(struct channel_path *chp)
994 {
995 unsigned long flags;
996 int ccode, ret;
997
998 struct {
999 struct chsc_header request;
1000 u32 : 24;
1001 u32 first_chpid : 8;
1002 u32 : 24;
1003 u32 last_chpid : 8;
1004 u32 zeroes1;
1005 struct chsc_header response;
1006 u32 zeroes2;
1007 u32 not_valid : 1;
1008 u32 shared : 1;
1009 u32 : 22;
1010 u32 chpid : 8;
1011 u32 cmcv : 5;
1012 u32 : 11;
1013 u32 cmgq : 8;
1014 u32 cmg : 8;
1015 u32 zeroes3;
1016 u32 data[NR_MEASUREMENT_CHARS];
1017 } *scmc_area;
1018
1019 chp->shared = -1;
1020 chp->cmg = -1;
1021
1022 if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm)
1023 return -EINVAL;
1024
1025 spin_lock_irqsave(&chsc_page_lock, flags);
1026 memset(chsc_page, 0, PAGE_SIZE);
1027 scmc_area = chsc_page;
1028 scmc_area->request.length = 0x0010;
1029 scmc_area->request.code = 0x0022;
1030 scmc_area->first_chpid = chp->chpid.id;
1031 scmc_area->last_chpid = chp->chpid.id;
1032
1033 ccode = chsc(scmc_area);
1034 if (ccode > 0) {
1035 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1036 goto out;
1037 }
1038
1039 ret = chsc_error_from_response(scmc_area->response.code);
1040 if (ret) {
1041 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
1042 scmc_area->response.code);
1043 goto out;
1044 }
1045 if (scmc_area->not_valid)
1046 goto out;
1047
1048 chp->cmg = scmc_area->cmg;
1049 chp->shared = scmc_area->shared;
1050 if (chp->cmg != 2 && chp->cmg != 3) {
1051 /* No cmg-dependent data. */
1052 goto out;
1053 }
1054 chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
1055 (struct cmg_chars *) &scmc_area->data);
1056 out:
1057 spin_unlock_irqrestore(&chsc_page_lock, flags);
1058 return ret;
1059 }
1060
1061 int __init chsc_init(void)
1062 {
1063 int ret;
1064
1065 sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
1066 chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
1067 if (!sei_page || !chsc_page) {
1068 ret = -ENOMEM;
1069 goto out_err;
1070 }
1071 ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
1072 if (ret)
1073 goto out_err;
1074 return ret;
1075 out_err:
1076 free_page((unsigned long)chsc_page);
1077 free_page((unsigned long)sei_page);
1078 return ret;
1079 }
1080
1081 void __init chsc_init_cleanup(void)
1082 {
1083 crw_unregister_handler(CRW_RSC_CSS);
1084 free_page((unsigned long)chsc_page);
1085 free_page((unsigned long)sei_page);
1086 }
1087
1088 int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code)
1089 {
1090 int ret;
1091
1092 sda_area->request.length = 0x0400;
1093 sda_area->request.code = 0x0031;
1094 sda_area->operation_code = operation_code;
1095
1096 ret = chsc(sda_area);
1097 if (ret > 0) {
1098 ret = (ret == 3) ? -ENODEV : -EBUSY;
1099 goto out;
1100 }
1101
1102 switch (sda_area->response.code) {
1103 case 0x0101:
1104 ret = -EOPNOTSUPP;
1105 break;
1106 default:
1107 ret = chsc_error_from_response(sda_area->response.code);
1108 }
1109 out:
1110 return ret;
1111 }
1112
1113 int chsc_enable_facility(int operation_code)
1114 {
1115 struct chsc_sda_area *sda_area;
1116 unsigned long flags;
1117 int ret;
1118
1119 spin_lock_irqsave(&chsc_page_lock, flags);
1120 memset(chsc_page, 0, PAGE_SIZE);
1121 sda_area = chsc_page;
1122
1123 ret = __chsc_enable_facility(sda_area, operation_code);
1124 if (ret != 0)
1125 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
1126 operation_code, sda_area->response.code);
1127
1128 spin_unlock_irqrestore(&chsc_page_lock, flags);
1129 return ret;
1130 }
1131
1132 int __init chsc_get_cssid(int idx)
1133 {
1134 struct {
1135 struct chsc_header request;
1136 u8 atype;
1137 u32 : 24;
1138 u32 reserved1[6];
1139 struct chsc_header response;
1140 u32 reserved2[3];
1141 struct {
1142 u8 cssid;
1143 u32 : 24;
1144 } list[0];
1145 } *sdcal_area;
1146 int ret;
1147
1148 spin_lock_irq(&chsc_page_lock);
1149 memset(chsc_page, 0, PAGE_SIZE);
1150 sdcal_area = chsc_page;
1151 sdcal_area->request.length = 0x0020;
1152 sdcal_area->request.code = 0x0034;
1153 sdcal_area->atype = 4;
1154
1155 ret = chsc(sdcal_area);
1156 if (ret) {
1157 ret = (ret == 3) ? -ENODEV : -EBUSY;
1158 goto exit;
1159 }
1160
1161 ret = chsc_error_from_response(sdcal_area->response.code);
1162 if (ret) {
1163 CIO_CRW_EVENT(2, "chsc: sdcal failed (rc=%04x)\n",
1164 sdcal_area->response.code);
1165 goto exit;
1166 }
1167
1168 if ((addr_t) &sdcal_area->list[idx] <
1169 (addr_t) &sdcal_area->response + sdcal_area->response.length)
1170 ret = sdcal_area->list[idx].cssid;
1171 else
1172 ret = -ENODEV;
1173 exit:
1174 spin_unlock_irq(&chsc_page_lock);
1175 return ret;
1176 }
1177
1178 struct css_general_char css_general_characteristics;
1179 struct css_chsc_char css_chsc_characteristics;
1180
1181 int __init
1182 chsc_determine_css_characteristics(void)
1183 {
1184 unsigned long flags;
1185 int result;
1186 struct {
1187 struct chsc_header request;
1188 u32 reserved1;
1189 u32 reserved2;
1190 u32 reserved3;
1191 struct chsc_header response;
1192 u32 reserved4;
1193 u32 general_char[510];
1194 u32 chsc_char[508];
1195 } *scsc_area;
1196
1197 spin_lock_irqsave(&chsc_page_lock, flags);
1198 memset(chsc_page, 0, PAGE_SIZE);
1199 scsc_area = chsc_page;
1200 scsc_area->request.length = 0x0010;
1201 scsc_area->request.code = 0x0010;
1202
1203 result = chsc(scsc_area);
1204 if (result) {
1205 result = (result == 3) ? -ENODEV : -EBUSY;
1206 goto exit;
1207 }
1208
1209 result = chsc_error_from_response(scsc_area->response.code);
1210 if (result == 0) {
1211 memcpy(&css_general_characteristics, scsc_area->general_char,
1212 sizeof(css_general_characteristics));
1213 memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
1214 sizeof(css_chsc_characteristics));
1215 } else
1216 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
1217 scsc_area->response.code);
1218 exit:
1219 spin_unlock_irqrestore(&chsc_page_lock, flags);
1220 return result;
1221 }
1222
1223 EXPORT_SYMBOL_GPL(css_general_characteristics);
1224 EXPORT_SYMBOL_GPL(css_chsc_characteristics);
1225
1226 int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta)
1227 {
1228 struct {
1229 struct chsc_header request;
1230 unsigned int rsvd0;
1231 unsigned int op : 8;
1232 unsigned int rsvd1 : 8;
1233 unsigned int ctrl : 16;
1234 unsigned int rsvd2[5];
1235 struct chsc_header response;
1236 unsigned int rsvd3[3];
1237 u64 clock_delta;
1238 unsigned int rsvd4[2];
1239 } *rr;
1240 int rc;
1241
1242 memset(page, 0, PAGE_SIZE);
1243 rr = page;
1244 rr->request.length = 0x0020;
1245 rr->request.code = 0x0033;
1246 rr->op = op;
1247 rr->ctrl = ctrl;
1248 rc = chsc(rr);
1249 if (rc)
1250 return -EIO;
1251 rc = (rr->response.code == 0x0001) ? 0 : -EIO;
1252 if (clock_delta)
1253 *clock_delta = rr->clock_delta;
1254 return rc;
1255 }
1256
1257 int chsc_sstpi(void *page, void *result, size_t size)
1258 {
1259 struct {
1260 struct chsc_header request;
1261 unsigned int rsvd0[3];
1262 struct chsc_header response;
1263 char data[];
1264 } *rr;
1265 int rc;
1266
1267 memset(page, 0, PAGE_SIZE);
1268 rr = page;
1269 rr->request.length = 0x0010;
1270 rr->request.code = 0x0038;
1271 rc = chsc(rr);
1272 if (rc)
1273 return -EIO;
1274 memcpy(result, &rr->data, size);
1275 return (rr->response.code == 0x0001) ? 0 : -EIO;
1276 }
1277
1278 int chsc_siosl(struct subchannel_id schid)
1279 {
1280 struct {
1281 struct chsc_header request;
1282 u32 word1;
1283 struct subchannel_id sid;
1284 u32 word3;
1285 struct chsc_header response;
1286 u32 word[11];
1287 } *siosl_area;
1288 unsigned long flags;
1289 int ccode;
1290 int rc;
1291
1292 spin_lock_irqsave(&chsc_page_lock, flags);
1293 memset(chsc_page, 0, PAGE_SIZE);
1294 siosl_area = chsc_page;
1295 siosl_area->request.length = 0x0010;
1296 siosl_area->request.code = 0x0046;
1297 siosl_area->word1 = 0x80000000;
1298 siosl_area->sid = schid;
1299
1300 ccode = chsc(siosl_area);
1301 if (ccode > 0) {
1302 if (ccode == 3)
1303 rc = -ENODEV;
1304 else
1305 rc = -EBUSY;
1306 CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
1307 schid.ssid, schid.sch_no, ccode);
1308 goto out;
1309 }
1310 rc = chsc_error_from_response(siosl_area->response.code);
1311 if (rc)
1312 CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
1313 schid.ssid, schid.sch_no,
1314 siosl_area->response.code);
1315 else
1316 CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
1317 schid.ssid, schid.sch_no);
1318 out:
1319 spin_unlock_irqrestore(&chsc_page_lock, flags);
1320 return rc;
1321 }
1322 EXPORT_SYMBOL_GPL(chsc_siosl);
1323
1324 /**
1325 * chsc_scm_info() - store SCM information (SSI)
1326 * @scm_area: request and response block for SSI
1327 * @token: continuation token
1328 *
1329 * Returns 0 on success.
1330 */
1331 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
1332 {
1333 int ccode, ret;
1334
1335 memset(scm_area, 0, sizeof(*scm_area));
1336 scm_area->request.length = 0x0020;
1337 scm_area->request.code = 0x004C;
1338 scm_area->reqtok = token;
1339
1340 ccode = chsc(scm_area);
1341 if (ccode > 0) {
1342 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1343 goto out;
1344 }
1345 ret = chsc_error_from_response(scm_area->response.code);
1346 if (ret != 0)
1347 CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",
1348 scm_area->response.code);
1349 out:
1350 return ret;
1351 }
1352 EXPORT_SYMBOL_GPL(chsc_scm_info);
1353
1354 /**
1355 * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info.
1356 * @schid: id of the subchannel on which PNSO is performed
1357 * @brinfo_area: request and response block for the operation
1358 * @resume_token: resume token for multiblock response
1359 * @cnc: Boolean change-notification control
1360 *
1361 * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
1362 *
1363 * Returns 0 on success.
1364 */
1365 int chsc_pnso_brinfo(struct subchannel_id schid,
1366 struct chsc_pnso_area *brinfo_area,
1367 struct chsc_brinfo_resume_token resume_token,
1368 int cnc)
1369 {
1370 memset(brinfo_area, 0, sizeof(*brinfo_area));
1371 brinfo_area->request.length = 0x0030;
1372 brinfo_area->request.code = 0x003d; /* network-subchannel operation */
1373 brinfo_area->m = schid.m;
1374 brinfo_area->ssid = schid.ssid;
1375 brinfo_area->sch = schid.sch_no;
1376 brinfo_area->cssid = schid.cssid;
1377 brinfo_area->oc = 0; /* Store-network-bridging-information list */
1378 brinfo_area->resume_token = resume_token;
1379 brinfo_area->n = (cnc != 0);
1380 if (chsc(brinfo_area))
1381 return -EIO;
1382 return chsc_error_from_response(brinfo_area->response.code);
1383 }
1384 EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);
Linux with added FPC-III support