2 * S/390 common I/O routines -- channel subsystem call
4 * Copyright IBM Corp. 1999,2012
5 * Author(s): Ingo Adlung (adlung@de.ibm.com)
6 * Cornelia Huck (cornelia.huck@de.ibm.com)
7 * Arnd Bergmann (arndb@de.ibm.com)
10 #define KMSG_COMPONENT "cio"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/init.h>
16 #include <linux/device.h>
17 #include <linux/mutex.h>
18 #include <linux/pci.h>
21 #include <asm/chpid.h>
25 #include <asm/ebcdic.h>
29 #include "cio_debug.h"
34 static void *sei_page;
35 static void *chsc_page;
36 static DEFINE_SPINLOCK(chsc_page_lock);
39 * chsc_error_from_response() - convert a chsc response to an error
40 * @response: chsc response code
42 * Returns an appropriate Linux error code for @response.
44 int chsc_error_from_response(int response)
60 case 0x0107: /* "Channel busy" for the op 0x003d */
69 EXPORT_SYMBOL_GPL(chsc_error_from_response);
71 struct chsc_ssd_area {
72 struct chsc_header request;
76 u16 f_sch; /* first subchannel */
78 u16 l_sch; /* last subchannel */
80 struct chsc_header response;
84 u8 st : 3; /* subchannel type */
86 u8 unit_addr; /* unit address */
87 u16 devno; /* device number */
90 u16 sch; /* subchannel */
91 u8 chpid[8]; /* chpids 0-7 */
92 u16 fla[8]; /* full link addresses 0-7 */
93 } __attribute__ ((packed));
95 int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
97 struct chsc_ssd_area *ssd_area;
103 spin_lock_irq(&chsc_page_lock);
104 memset(chsc_page, 0, PAGE_SIZE);
105 ssd_area = chsc_page;
106 ssd_area->request.length = 0x0010;
107 ssd_area->request.code = 0x0004;
108 ssd_area->ssid = schid.ssid;
109 ssd_area->f_sch = schid.sch_no;
110 ssd_area->l_sch = schid.sch_no;
112 ccode = chsc(ssd_area);
113 /* Check response. */
115 ret = (ccode == 3) ? -ENODEV : -EBUSY;
118 ret = chsc_error_from_response(ssd_area->response.code);
120 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
121 schid.ssid, schid.sch_no,
122 ssd_area->response.code);
125 if (!ssd_area->sch_valid) {
131 memset(ssd, 0, sizeof(struct chsc_ssd_info));
132 if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
133 (ssd_area->st != SUBCHANNEL_TYPE_MSG))
135 ssd->path_mask = ssd_area->path_mask;
136 ssd->fla_valid_mask = ssd_area->fla_valid_mask;
137 for (i = 0; i < 8; i++) {
139 if (ssd_area->path_mask & mask) {
140 chp_id_init(&ssd->chpid[i]);
141 ssd->chpid[i].id = ssd_area->chpid[i];
143 if (ssd_area->fla_valid_mask & mask)
144 ssd->fla[i] = ssd_area->fla[i];
147 spin_unlock_irq(&chsc_page_lock);
152 * chsc_ssqd() - store subchannel QDIO data (SSQD)
153 * @schid: id of the subchannel on which SSQD is performed
154 * @ssqd: request and response block for SSQD
156 * Returns 0 on success.
158 int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd)
160 memset(ssqd, 0, sizeof(*ssqd));
161 ssqd->request.length = 0x0010;
162 ssqd->request.code = 0x0024;
163 ssqd->first_sch = schid.sch_no;
164 ssqd->last_sch = schid.sch_no;
165 ssqd->ssid = schid.ssid;
170 return chsc_error_from_response(ssqd->response.code);
172 EXPORT_SYMBOL_GPL(chsc_ssqd);
175 * chsc_sadc() - set adapter device controls (SADC)
176 * @schid: id of the subchannel on which SADC is performed
177 * @scssc: request and response block for SADC
178 * @summary_indicator_addr: summary indicator address
179 * @subchannel_indicator_addr: subchannel indicator address
181 * Returns 0 on success.
183 int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
184 u64 summary_indicator_addr, u64 subchannel_indicator_addr)
186 memset(scssc, 0, sizeof(*scssc));
187 scssc->request.length = 0x0fe0;
188 scssc->request.code = 0x0021;
189 scssc->operation_code = 0;
191 scssc->summary_indicator_addr = summary_indicator_addr;
192 scssc->subchannel_indicator_addr = subchannel_indicator_addr;
194 scssc->ks = PAGE_DEFAULT_KEY >> 4;
195 scssc->kc = PAGE_DEFAULT_KEY >> 4;
196 scssc->isc = QDIO_AIRQ_ISC;
197 scssc->schid = schid;
199 /* enable the time delay disablement facility */
200 if (css_general_characteristics.aif_tdd)
201 scssc->word_with_d_bit = 0x10000000;
206 return chsc_error_from_response(scssc->response.code);
208 EXPORT_SYMBOL_GPL(chsc_sadc);
210 static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
212 spin_lock_irq(sch->lock);
213 if (sch->driver && sch->driver->chp_event)
214 if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0)
216 spin_unlock_irq(sch->lock);
221 spin_unlock_irq(sch->lock);
222 css_schedule_eval(sch->schid);
226 void chsc_chp_offline(struct chp_id chpid)
228 struct channel_path *chp = chpid_to_chp(chpid);
229 struct chp_link link;
232 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
233 CIO_TRACE_EVENT(2, dbf_txt);
235 if (chp_get_status(chpid) <= 0)
237 memset(&link, 0, sizeof(struct chp_link));
239 /* Wait until previous actions have settled. */
240 css_wait_for_slow_path();
242 mutex_lock(&chp->lock);
243 chp_update_desc(chp);
244 mutex_unlock(&chp->lock);
246 for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
249 static int __s390_process_res_acc(struct subchannel *sch, void *data)
251 spin_lock_irq(sch->lock);
252 if (sch->driver && sch->driver->chp_event)
253 sch->driver->chp_event(sch, data, CHP_ONLINE);
254 spin_unlock_irq(sch->lock);
259 static void s390_process_res_acc(struct chp_link *link)
263 sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
265 CIO_TRACE_EVENT( 2, dbf_txt);
266 if (link->fla != 0) {
267 sprintf(dbf_txt, "fla%x", link->fla);
268 CIO_TRACE_EVENT( 2, dbf_txt);
270 /* Wait until previous actions have settled. */
271 css_wait_for_slow_path();
273 * I/O resources may have become accessible.
274 * Scan through all subchannels that may be concerned and
275 * do a validation on those.
276 * The more information we have (info), the less scanning
277 * will we have to do.
279 for_each_subchannel_staged(__s390_process_res_acc, NULL, link);
280 css_schedule_reprobe();
283 struct chsc_sei_nt0_area {
285 u8 vf; /* validity flags */
286 u8 rs; /* reporting source */
287 u8 cc; /* content code */
288 u16 fla; /* full link address */
289 u16 rsid; /* reporting source id */
292 /* ccdf has to be big enough for a link-incident record */
293 u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */
296 struct chsc_sei_nt2_area {
297 u8 flags; /* p and v bit */
300 u8 cc; /* content code */
302 u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */
305 #define CHSC_SEI_NT0 (1ULL << 63)
306 #define CHSC_SEI_NT2 (1ULL << 61)
309 struct chsc_header request;
311 u64 ntsm; /* notification type mask */
312 struct chsc_header response;
316 struct chsc_sei_nt0_area nt0_area;
317 struct chsc_sei_nt2_area nt2_area;
318 u8 nt_area[PAGE_SIZE - 24];
323 * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands"
326 #define ND_VALIDITY_VALID 0
327 #define ND_VALIDITY_OUTDATED 1
328 #define ND_VALIDITY_INVALID 2
330 struct node_descriptor {
340 /* Node parameters. */
346 char manufacturer[3];
353 * Link Incident Record as defined in SA22-7202, "ESCON I/O Interface"
356 #define LIR_IQ_CLASS_INFO 0
357 #define LIR_IQ_CLASS_DEGRADED 1
358 #define LIR_IQ_CLASS_NOT_OPERATIONAL 2
369 struct node_descriptor incident_node;
370 struct node_descriptor attached_node;
374 #define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */
375 #define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
377 /* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */
378 static char *store_ebcdic(char *dest, const char *src, unsigned long len,
381 memcpy(dest, src, len);
390 /* Format node ID and parameters for output in LIR log message. */
391 static void format_node_data(char *params, char *id, struct node_descriptor *nd)
393 memset(params, 0, PARAMS_LEN);
394 memset(id, 0, NODEID_LEN);
396 if (nd->validity != ND_VALIDITY_VALID) {
397 strncpy(params, "n/a", PARAMS_LEN - 1);
398 strncpy(id, "n/a", NODEID_LEN - 1);
402 /* PARAMS=xx,xxxxxx */
403 snprintf(params, PARAMS_LEN, "%02x,%06x", nd->byte0, nd->params);
404 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
405 id = store_ebcdic(id, nd->type, sizeof(nd->type), '/');
406 id = store_ebcdic(id, nd->model, sizeof(nd->model), ',');
407 id = store_ebcdic(id, nd->manufacturer, sizeof(nd->manufacturer), '.');
408 id = store_ebcdic(id, nd->plant, sizeof(nd->plant), 0);
409 id = store_ebcdic(id, nd->seq, sizeof(nd->seq), ',');
410 sprintf(id, "%04X", nd->tag);
413 static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
415 struct lir *lir = (struct lir *) &sei_area->ccdf;
416 char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN],
417 aunodeid[NODEID_LEN];
419 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x, iq=%02x)\n",
420 sei_area->rs, sei_area->rsid, sei_area->ccdf[0]);
422 /* Ignore NULL Link Incident Records. */
426 /* Inform user that a link requires maintenance actions because it has
427 * become degraded or not operational. Note that this log message is
428 * the primary intention behind a Link Incident Record. */
430 format_node_data(iuparams, iunodeid, &lir->incident_node);
431 format_node_data(auparams, aunodeid, &lir->attached_node);
433 switch (lir->iq.class) {
434 case LIR_IQ_CLASS_DEGRADED:
435 pr_warn("Link degraded: RS=%02x RSID=%04x IC=%02x "
436 "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
437 sei_area->rs, sei_area->rsid, lir->ic, iuparams,
438 iunodeid, auparams, aunodeid);
440 case LIR_IQ_CLASS_NOT_OPERATIONAL:
441 pr_err("Link stopped: RS=%02x RSID=%04x IC=%02x "
442 "IUPARAMS=%s IUNODEID=%s AUPARAMS=%s AUNODEID=%s\n",
443 sei_area->rs, sei_area->rsid, lir->ic, iuparams,
444 iunodeid, auparams, aunodeid);
451 static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
453 struct chp_link link;
457 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
458 "rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
459 if (sei_area->rs != 4)
462 chpid.id = sei_area->rsid;
463 /* allocate a new channel path structure, if needed */
464 status = chp_get_status(chpid);
469 memset(&link, 0, sizeof(struct chp_link));
471 if ((sei_area->vf & 0xc0) != 0) {
472 link.fla = sei_area->fla;
473 if ((sei_area->vf & 0xc0) == 0xc0)
474 /* full link address */
475 link.fla_mask = 0xffff;
478 link.fla_mask = 0xff00;
480 s390_process_res_acc(&link);
483 static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area)
485 struct channel_path *chp;
490 CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
491 if (sei_area->rs != 0)
493 data = sei_area->ccdf;
495 for (num = 0; num <= __MAX_CHPID; num++) {
496 if (!chp_test_bit(data, num))
500 CIO_CRW_EVENT(4, "Update information for channel path "
501 "%x.%02x\n", chpid.cssid, chpid.id);
502 chp = chpid_to_chp(chpid);
507 mutex_lock(&chp->lock);
508 chp_update_desc(chp);
509 mutex_unlock(&chp->lock);
513 struct chp_config_data {
519 static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area)
521 struct chp_config_data *data;
524 char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
526 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
527 if (sei_area->rs != 0)
529 data = (struct chp_config_data *) &(sei_area->ccdf);
531 for (num = 0; num <= __MAX_CHPID; num++) {
532 if (!chp_test_bit(data->map, num))
535 pr_notice("Processing %s for channel path %x.%02x\n",
536 events[data->op], chpid.cssid, chpid.id);
539 chp_cfg_schedule(chpid, 1);
542 chp_cfg_schedule(chpid, 0);
545 chp_cfg_cancel_deconfigure(chpid);
551 static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
555 CIO_CRW_EVENT(4, "chsc: scm change notification\n");
556 if (sei_area->rs != 7)
559 ret = scm_update_information();
561 CIO_CRW_EVENT(0, "chsc: updating change notification"
562 " failed (rc=%d).\n", ret);
565 static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
569 CIO_CRW_EVENT(4, "chsc: scm available information\n");
570 if (sei_area->rs != 7)
573 ret = scm_process_availability_information();
575 CIO_CRW_EVENT(0, "chsc: process availability information"
576 " failed (rc=%d).\n", ret);
579 static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
581 switch (sei_area->cc) {
583 zpci_event_error(sei_area->ccdf);
586 zpci_event_availability(sei_area->ccdf);
589 CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n",
595 static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
597 /* which kind of information was stored? */
598 switch (sei_area->cc) {
599 case 1: /* link incident*/
600 chsc_process_sei_link_incident(sei_area);
602 case 2: /* i/o resource accessibility */
603 chsc_process_sei_res_acc(sei_area);
605 case 7: /* channel-path-availability information */
606 chsc_process_sei_chp_avail(sei_area);
608 case 8: /* channel-path-configuration notification */
609 chsc_process_sei_chp_config(sei_area);
611 case 12: /* scm change notification */
612 chsc_process_sei_scm_change(sei_area);
614 case 14: /* scm available notification */
615 chsc_process_sei_scm_avail(sei_area);
617 default: /* other stuff */
618 CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
623 /* Check if we might have lost some information. */
624 if (sei_area->flags & 0x40) {
625 CIO_CRW_EVENT(2, "chsc: event overflow\n");
626 css_schedule_eval_all();
630 static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
632 static int ntsm_unsupported;
635 memset(sei, 0, sizeof(*sei));
636 sei->request.length = 0x0010;
637 sei->request.code = 0x000e;
638 if (!ntsm_unsupported)
644 if (sei->response.code != 0x0001) {
645 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n",
646 sei->response.code, sei->ntsm);
648 if (sei->response.code == 3 && sei->ntsm) {
649 /* Fallback for old firmware. */
650 ntsm_unsupported = 1;
656 CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
659 chsc_process_sei_nt0(&sei->u.nt0_area);
662 chsc_process_sei_nt2(&sei->u.nt2_area);
665 CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
669 if (!(sei->u.nt0_area.flags & 0x80))
675 * Handle channel subsystem related CRWs.
676 * Use store event information to find out what's going on.
678 * Note: Access to sei_page is serialized through machine check handler
679 * thread, so no need for locking.
681 static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
683 struct chsc_sei *sei = sei_page;
686 css_schedule_eval_all();
689 CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
690 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
691 crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
692 crw0->erc, crw0->rsid);
694 CIO_TRACE_EVENT(2, "prcss");
695 chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
698 void chsc_chp_online(struct chp_id chpid)
700 struct channel_path *chp = chpid_to_chp(chpid);
701 struct chp_link link;
704 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
705 CIO_TRACE_EVENT(2, dbf_txt);
707 if (chp_get_status(chpid) != 0) {
708 memset(&link, 0, sizeof(struct chp_link));
710 /* Wait until previous actions have settled. */
711 css_wait_for_slow_path();
713 mutex_lock(&chp->lock);
714 chp_update_desc(chp);
715 mutex_unlock(&chp->lock);
717 for_each_subchannel_staged(__s390_process_res_acc, NULL,
719 css_schedule_reprobe();
723 static void __s390_subchannel_vary_chpid(struct subchannel *sch,
724 struct chp_id chpid, int on)
727 struct chp_link link;
729 memset(&link, 0, sizeof(struct chp_link));
731 spin_lock_irqsave(sch->lock, flags);
732 if (sch->driver && sch->driver->chp_event)
733 sch->driver->chp_event(sch, &link,
734 on ? CHP_VARY_ON : CHP_VARY_OFF);
735 spin_unlock_irqrestore(sch->lock, flags);
738 static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
740 struct chp_id *chpid = data;
742 __s390_subchannel_vary_chpid(sch, *chpid, 0);
746 static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
748 struct chp_id *chpid = data;
750 __s390_subchannel_vary_chpid(sch, *chpid, 1);
755 * chsc_chp_vary - propagate channel-path vary operation to subchannels
756 * @chpid: channl-path ID
757 * @on: non-zero for vary online, zero for vary offline
759 int chsc_chp_vary(struct chp_id chpid, int on)
761 struct channel_path *chp = chpid_to_chp(chpid);
763 /* Wait until previous actions have settled. */
764 css_wait_for_slow_path();
766 * Redo PathVerification on the devices the chpid connects to
769 /* Try to update the channel path description. */
770 chp_update_desc(chp);
771 for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
773 css_schedule_reprobe();
775 for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
782 chsc_remove_cmg_attr(struct channel_subsystem *css)
786 for (i = 0; i <= __MAX_CHPID; i++) {
789 chp_remove_cmg_attr(css->chps[i]);
794 chsc_add_cmg_attr(struct channel_subsystem *css)
799 for (i = 0; i <= __MAX_CHPID; i++) {
802 ret = chp_add_cmg_attr(css->chps[i]);
808 for (--i; i >= 0; i--) {
811 chp_remove_cmg_attr(css->chps[i]);
816 int __chsc_do_secm(struct channel_subsystem *css, int enable)
819 struct chsc_header request;
820 u32 operation_code : 2;
829 struct chsc_header response;
834 } __attribute__ ((packed)) *secm_area;
837 spin_lock_irq(&chsc_page_lock);
838 memset(chsc_page, 0, PAGE_SIZE);
839 secm_area = chsc_page;
840 secm_area->request.length = 0x0050;
841 secm_area->request.code = 0x0016;
843 secm_area->key = PAGE_DEFAULT_KEY >> 4;
844 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
845 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
847 secm_area->operation_code = enable ? 0 : 1;
849 ccode = chsc(secm_area);
851 ret = (ccode == 3) ? -ENODEV : -EBUSY;
855 switch (secm_area->response.code) {
861 ret = chsc_error_from_response(secm_area->response.code);
864 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
865 secm_area->response.code);
867 spin_unlock_irq(&chsc_page_lock);
872 chsc_secm(struct channel_subsystem *css, int enable)
876 if (enable && !css->cm_enabled) {
877 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
878 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
879 if (!css->cub_addr1 || !css->cub_addr2) {
880 free_page((unsigned long)css->cub_addr1);
881 free_page((unsigned long)css->cub_addr2);
885 ret = __chsc_do_secm(css, enable);
887 css->cm_enabled = enable;
888 if (css->cm_enabled) {
889 ret = chsc_add_cmg_attr(css);
891 __chsc_do_secm(css, 0);
895 chsc_remove_cmg_attr(css);
897 if (!css->cm_enabled) {
898 free_page((unsigned long)css->cub_addr1);
899 free_page((unsigned long)css->cub_addr2);
904 int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
905 int c, int m, void *page)
907 struct chsc_scpd *scpd_area;
910 if ((rfmt == 1) && !css_general_characteristics.fcs)
912 if ((rfmt == 2) && !css_general_characteristics.cib)
915 memset(page, 0, PAGE_SIZE);
917 scpd_area->request.length = 0x0010;
918 scpd_area->request.code = 0x0002;
919 scpd_area->cssid = chpid.cssid;
920 scpd_area->first_chpid = chpid.id;
921 scpd_area->last_chpid = chpid.id;
924 scpd_area->fmt = fmt;
925 scpd_area->rfmt = rfmt;
927 ccode = chsc(scpd_area);
929 return (ccode == 3) ? -ENODEV : -EBUSY;
931 ret = chsc_error_from_response(scpd_area->response.code);
933 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
934 scpd_area->response.code);
937 EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
939 int chsc_determine_base_channel_path_desc(struct chp_id chpid,
940 struct channel_path_desc *desc)
942 struct chsc_response_struct *chsc_resp;
943 struct chsc_scpd *scpd_area;
947 spin_lock_irqsave(&chsc_page_lock, flags);
948 scpd_area = chsc_page;
949 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area);
952 chsc_resp = (void *)&scpd_area->response;
953 memcpy(desc, &chsc_resp->data, sizeof(*desc));
955 spin_unlock_irqrestore(&chsc_page_lock, flags);
959 int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
960 struct channel_path_desc_fmt1 *desc)
962 struct chsc_response_struct *chsc_resp;
963 struct chsc_scpd *scpd_area;
967 spin_lock_irqsave(&chsc_page_lock, flags);
968 scpd_area = chsc_page;
969 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area);
972 chsc_resp = (void *)&scpd_area->response;
973 memcpy(desc, &chsc_resp->data, sizeof(*desc));
975 spin_unlock_irqrestore(&chsc_page_lock, flags);
980 chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
981 struct cmg_chars *chars)
985 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
986 mask = 0x80 >> (i + 3);
988 chp->cmg_chars.values[i] = chars->values[i];
990 chp->cmg_chars.values[i] = 0;
994 int chsc_get_channel_measurement_chars(struct channel_path *chp)
999 struct chsc_header request;
1001 u32 first_chpid : 8;
1005 struct chsc_header response;
1016 u32 data[NR_MEASUREMENT_CHARS];
1017 } __attribute__ ((packed)) *scmc_area;
1022 if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm)
1025 spin_lock_irq(&chsc_page_lock);
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;
1033 ccode = chsc(scmc_area);
1035 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1039 ret = chsc_error_from_response(scmc_area->response.code);
1041 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
1042 scmc_area->response.code);
1045 if (scmc_area->not_valid)
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. */
1054 chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
1055 (struct cmg_chars *) &scmc_area->data);
1057 spin_unlock_irq(&chsc_page_lock);
1061 int __init chsc_init(void)
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) {
1071 ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
1076 free_page((unsigned long)chsc_page);
1077 free_page((unsigned long)sei_page);
1081 void __init chsc_init_cleanup(void)
1083 crw_unregister_handler(CRW_RSC_CSS);
1084 free_page((unsigned long)chsc_page);
1085 free_page((unsigned long)sei_page);
1088 int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code)
1092 sda_area->request.length = 0x0400;
1093 sda_area->request.code = 0x0031;
1094 sda_area->operation_code = operation_code;
1096 ret = chsc(sda_area);
1098 ret = (ret == 3) ? -ENODEV : -EBUSY;
1102 switch (sda_area->response.code) {
1107 ret = chsc_error_from_response(sda_area->response.code);
1113 int chsc_enable_facility(int operation_code)
1115 struct chsc_sda_area *sda_area;
1116 unsigned long flags;
1119 spin_lock_irqsave(&chsc_page_lock, flags);
1120 memset(chsc_page, 0, PAGE_SIZE);
1121 sda_area = chsc_page;
1123 ret = __chsc_enable_facility(sda_area, operation_code);
1125 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
1126 operation_code, sda_area->response.code);
1128 spin_unlock_irqrestore(&chsc_page_lock, flags);
1132 struct css_general_char css_general_characteristics;
1133 struct css_chsc_char css_chsc_characteristics;
1136 chsc_determine_css_characteristics(void)
1140 struct chsc_header request;
1144 struct chsc_header response;
1146 u32 general_char[510];
1148 } __attribute__ ((packed)) *scsc_area;
1150 spin_lock_irq(&chsc_page_lock);
1151 memset(chsc_page, 0, PAGE_SIZE);
1152 scsc_area = chsc_page;
1153 scsc_area->request.length = 0x0010;
1154 scsc_area->request.code = 0x0010;
1156 result = chsc(scsc_area);
1158 result = (result == 3) ? -ENODEV : -EBUSY;
1162 result = chsc_error_from_response(scsc_area->response.code);
1164 memcpy(&css_general_characteristics, scsc_area->general_char,
1165 sizeof(css_general_characteristics));
1166 memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
1167 sizeof(css_chsc_characteristics));
1169 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
1170 scsc_area->response.code);
1172 spin_unlock_irq(&chsc_page_lock);
1176 EXPORT_SYMBOL_GPL(css_general_characteristics);
1177 EXPORT_SYMBOL_GPL(css_chsc_characteristics);
1179 int chsc_sstpc(void *page, unsigned int op, u16 ctrl)
1182 struct chsc_header request;
1184 unsigned int op : 8;
1185 unsigned int rsvd1 : 8;
1186 unsigned int ctrl : 16;
1187 unsigned int rsvd2[5];
1188 struct chsc_header response;
1189 unsigned int rsvd3[7];
1190 } __attribute__ ((packed)) *rr;
1193 memset(page, 0, PAGE_SIZE);
1195 rr->request.length = 0x0020;
1196 rr->request.code = 0x0033;
1202 rc = (rr->response.code == 0x0001) ? 0 : -EIO;
1206 int chsc_sstpi(void *page, void *result, size_t size)
1209 struct chsc_header request;
1210 unsigned int rsvd0[3];
1211 struct chsc_header response;
1213 } __attribute__ ((packed)) *rr;
1216 memset(page, 0, PAGE_SIZE);
1218 rr->request.length = 0x0010;
1219 rr->request.code = 0x0038;
1223 memcpy(result, &rr->data, size);
1224 return (rr->response.code == 0x0001) ? 0 : -EIO;
1227 int chsc_siosl(struct subchannel_id schid)
1230 struct chsc_header request;
1232 struct subchannel_id sid;
1234 struct chsc_header response;
1236 } __attribute__ ((packed)) *siosl_area;
1237 unsigned long flags;
1241 spin_lock_irqsave(&chsc_page_lock, flags);
1242 memset(chsc_page, 0, PAGE_SIZE);
1243 siosl_area = chsc_page;
1244 siosl_area->request.length = 0x0010;
1245 siosl_area->request.code = 0x0046;
1246 siosl_area->word1 = 0x80000000;
1247 siosl_area->sid = schid;
1249 ccode = chsc(siosl_area);
1255 CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
1256 schid.ssid, schid.sch_no, ccode);
1259 rc = chsc_error_from_response(siosl_area->response.code);
1261 CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
1262 schid.ssid, schid.sch_no,
1263 siosl_area->response.code);
1265 CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
1266 schid.ssid, schid.sch_no);
1268 spin_unlock_irqrestore(&chsc_page_lock, flags);
1271 EXPORT_SYMBOL_GPL(chsc_siosl);
1274 * chsc_scm_info() - store SCM information (SSI)
1275 * @scm_area: request and response block for SSI
1276 * @token: continuation token
1278 * Returns 0 on success.
1280 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
1284 memset(scm_area, 0, sizeof(*scm_area));
1285 scm_area->request.length = 0x0020;
1286 scm_area->request.code = 0x004C;
1287 scm_area->reqtok = token;
1289 ccode = chsc(scm_area);
1291 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1294 ret = chsc_error_from_response(scm_area->response.code);
1296 CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",
1297 scm_area->response.code);
1301 EXPORT_SYMBOL_GPL(chsc_scm_info);
1304 * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info.
1305 * @schid: id of the subchannel on which PNSO is performed
1306 * @brinfo_area: request and response block for the operation
1307 * @resume_token: resume token for multiblock response
1308 * @cnc: Boolean change-notification control
1310 * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
1312 * Returns 0 on success.
1314 int chsc_pnso_brinfo(struct subchannel_id schid,
1315 struct chsc_pnso_area *brinfo_area,
1316 struct chsc_brinfo_resume_token resume_token,
1319 memset(brinfo_area, 0, sizeof(*brinfo_area));
1320 brinfo_area->request.length = 0x0030;
1321 brinfo_area->request.code = 0x003d; /* network-subchannel operation */
1322 brinfo_area->m = schid.m;
1323 brinfo_area->ssid = schid.ssid;
1324 brinfo_area->sch = schid.sch_no;
1325 brinfo_area->cssid = schid.cssid;
1326 brinfo_area->oc = 0; /* Store-network-bridging-information list */
1327 brinfo_area->resume_token = resume_token;
1328 brinfo_area->n = (cnc != 0);
1329 if (chsc(brinfo_area))
1331 return chsc_error_from_response(brinfo_area->response.code);
1333 EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);