1 // SPDX-License-Identifier: GPL-2.0
3 * S/390 common I/O routines -- channel subsystem call
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)
11 #define KMSG_COMPONENT "cio"
12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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>
22 #include <asm/chpid.h>
26 #include <asm/ebcdic.h>
30 #include "cio_debug.h"
35 static void *sei_page;
36 static void *chsc_page;
37 static DEFINE_SPINLOCK(chsc_page_lock);
40 * chsc_error_from_response() - convert a chsc response to an error
41 * @response: chsc response code
43 * Returns an appropriate Linux error code for @response.
45 int chsc_error_from_response(int response)
61 case 0x0107: /* "Channel busy" for the op 0x003d */
70 EXPORT_SYMBOL_GPL(chsc_error_from_response);
72 struct chsc_ssd_area {
73 struct chsc_header request;
77 u16 f_sch; /* first subchannel */
79 u16 l_sch; /* last subchannel */
81 struct chsc_header response;
85 u8 st : 3; /* subchannel type */
87 u8 unit_addr; /* unit address */
88 u16 devno; /* device number */
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);
96 int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
98 struct chsc_ssd_area *ssd_area;
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;
114 ccode = chsc(ssd_area);
115 /* Check response. */
117 ret = (ccode == 3) ? -ENODEV : -EBUSY;
120 ret = chsc_error_from_response(ssd_area->response.code);
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);
127 if (!ssd_area->sch_valid) {
133 memset(ssd, 0, sizeof(struct chsc_ssd_info));
134 if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
135 (ssd_area->st != SUBCHANNEL_TYPE_MSG))
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++) {
141 if (ssd_area->path_mask & mask) {
142 chp_id_init(&ssd->chpid[i]);
143 ssd->chpid[i].id = ssd_area->chpid[i];
145 if (ssd_area->fla_valid_mask & mask)
146 ssd->fla[i] = ssd_area->fla[i];
149 spin_unlock_irqrestore(&chsc_page_lock, flags);
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
158 * Returns 0 on success.
160 int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd)
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;
172 return chsc_error_from_response(ssqd->response.code);
174 EXPORT_SYMBOL_GPL(chsc_ssqd);
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
183 * Returns 0 on success.
185 int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
186 u64 summary_indicator_addr, u64 subchannel_indicator_addr)
188 memset(scssc, 0, sizeof(*scssc));
189 scssc->request.length = 0x0fe0;
190 scssc->request.code = 0x0021;
191 scssc->operation_code = 0;
193 scssc->summary_indicator_addr = summary_indicator_addr;
194 scssc->subchannel_indicator_addr = subchannel_indicator_addr;
196 scssc->ks = PAGE_DEFAULT_KEY >> 4;
197 scssc->kc = PAGE_DEFAULT_KEY >> 4;
198 scssc->isc = QDIO_AIRQ_ISC;
199 scssc->schid = schid;
201 /* enable the time delay disablement facility */
202 if (css_general_characteristics.aif_tdd)
203 scssc->word_with_d_bit = 0x10000000;
208 return chsc_error_from_response(scssc->response.code);
210 EXPORT_SYMBOL_GPL(chsc_sadc);
212 static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
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)
218 spin_unlock_irq(sch->lock);
223 spin_unlock_irq(sch->lock);
224 css_schedule_eval(sch->schid);
228 void chsc_chp_offline(struct chp_id chpid)
230 struct channel_path *chp = chpid_to_chp(chpid);
231 struct chp_link link;
234 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
235 CIO_TRACE_EVENT(2, dbf_txt);
237 if (chp_get_status(chpid) <= 0)
239 memset(&link, 0, sizeof(struct chp_link));
241 /* Wait until previous actions have settled. */
242 css_wait_for_slow_path();
244 mutex_lock(&chp->lock);
245 chp_update_desc(chp);
246 mutex_unlock(&chp->lock);
248 for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
251 static int __s390_process_res_acc(struct subchannel *sch, void *data)
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);
261 static void s390_process_res_acc(struct chp_link *link)
265 sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
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);
272 /* Wait until previous actions have settled. */
273 css_wait_for_slow_path();
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.
281 for_each_subchannel_staged(__s390_process_res_acc, NULL, link);
282 css_schedule_reprobe();
285 struct chsc_sei_nt0_area {
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 */
294 /* ccdf has to be big enough for a link-incident record */
295 u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */
298 struct chsc_sei_nt2_area {
299 u8 flags; /* p and v bit */
302 u8 cc; /* content code */
304 u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */
307 #define CHSC_SEI_NT0 (1ULL << 63)
308 #define CHSC_SEI_NT2 (1ULL << 61)
311 struct chsc_header request;
313 u64 ntsm; /* notification type mask */
314 struct chsc_header response;
318 struct chsc_sei_nt0_area nt0_area;
319 struct chsc_sei_nt2_area nt2_area;
320 u8 nt_area[PAGE_SIZE - 24];
322 } __packed __aligned(PAGE_SIZE);
325 * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands"
328 #define ND_VALIDITY_VALID 0
329 #define ND_VALIDITY_OUTDATED 1
330 #define ND_VALIDITY_INVALID 2
332 struct node_descriptor {
342 /* Node parameters. */
348 char manufacturer[3];
355 * Link Incident Record as defined in SA22-7202, "ESCON I/O Interface"
358 #define LIR_IQ_CLASS_INFO 0
359 #define LIR_IQ_CLASS_DEGRADED 1
360 #define LIR_IQ_CLASS_NOT_OPERATIONAL 2
371 struct node_descriptor incident_node;
372 struct node_descriptor attached_node;
376 #define PARAMS_LEN 10 /* PARAMS=xx,xxxxxx */
377 #define NODEID_LEN 35 /* NODEID=tttttt/mdl,mmm.ppssssssssssss,xxxx */
379 /* Copy EBCIDC text, convert to ASCII and optionally add delimiter. */
380 static char *store_ebcdic(char *dest, const char *src, unsigned long len,
383 memcpy(dest, src, len);
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)
395 memset(params, 0, PARAMS_LEN);
396 memset(id, 0, NODEID_LEN);
398 if (nd->validity != ND_VALIDITY_VALID) {
399 strncpy(params, "n/a", PARAMS_LEN - 1);
400 strncpy(id, "n/a", NODEID_LEN - 1);
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);
415 static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
417 struct lir *lir = (struct lir *) &sei_area->ccdf;
418 char iuparams[PARAMS_LEN], iunodeid[NODEID_LEN], auparams[PARAMS_LEN],
419 aunodeid[NODEID_LEN];
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]);
424 /* Ignore NULL Link Incident Records. */
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. */
432 format_node_data(iuparams, iunodeid, &lir->incident_node);
433 format_node_data(auparams, aunodeid, &lir->attached_node);
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);
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);
453 static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
455 struct channel_path *chp;
456 struct chp_link link;
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)
465 chpid.id = sei_area->rsid;
466 /* allocate a new channel path structure, if needed */
467 status = chp_get_status(chpid);
474 chp = chpid_to_chp(chpid);
475 mutex_lock(&chp->lock);
476 chp_update_desc(chp);
477 mutex_unlock(&chp->lock);
479 memset(&link, 0, sizeof(struct chp_link));
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;
488 link.fla_mask = 0xff00;
490 s390_process_res_acc(&link);
493 static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area)
495 struct channel_path *chp;
500 CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
501 if (sei_area->rs != 0)
503 data = sei_area->ccdf;
505 for (num = 0; num <= __MAX_CHPID; num++) {
506 if (!chp_test_bit(data, num))
510 CIO_CRW_EVENT(4, "Update information for channel path "
511 "%x.%02x\n", chpid.cssid, chpid.id);
512 chp = chpid_to_chp(chpid);
517 mutex_lock(&chp->lock);
518 chp_update_desc(chp);
519 mutex_unlock(&chp->lock);
523 struct chp_config_data {
529 static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area)
531 struct chp_config_data *data;
534 char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
536 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
537 if (sei_area->rs != 0)
539 data = (struct chp_config_data *) &(sei_area->ccdf);
541 for (num = 0; num <= __MAX_CHPID; num++) {
542 if (!chp_test_bit(data->map, num))
545 pr_notice("Processing %s for channel path %x.%02x\n",
546 events[data->op], chpid.cssid, chpid.id);
549 chp_cfg_schedule(chpid, 1);
552 chp_cfg_schedule(chpid, 0);
555 chp_cfg_cancel_deconfigure(chpid);
561 static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
565 CIO_CRW_EVENT(4, "chsc: scm change notification\n");
566 if (sei_area->rs != 7)
569 ret = scm_update_information();
571 CIO_CRW_EVENT(0, "chsc: updating change notification"
572 " failed (rc=%d).\n", ret);
575 static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
579 CIO_CRW_EVENT(4, "chsc: scm available information\n");
580 if (sei_area->rs != 7)
583 ret = scm_process_availability_information();
585 CIO_CRW_EVENT(0, "chsc: process availability information"
586 " failed (rc=%d).\n", ret);
589 static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
591 switch (sei_area->cc) {
593 zpci_event_error(sei_area->ccdf);
596 zpci_event_availability(sei_area->ccdf);
599 CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n",
605 static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
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);
612 case 2: /* i/o resource accessibility */
613 chsc_process_sei_res_acc(sei_area);
615 case 7: /* channel-path-availability information */
616 chsc_process_sei_chp_avail(sei_area);
618 case 8: /* channel-path-configuration notification */
619 chsc_process_sei_chp_config(sei_area);
621 case 12: /* scm change notification */
622 chsc_process_sei_scm_change(sei_area);
624 case 14: /* scm available notification */
625 chsc_process_sei_scm_avail(sei_area);
627 default: /* other stuff */
628 CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
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();
640 static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
642 static int ntsm_unsupported;
645 memset(sei, 0, sizeof(*sei));
646 sei->request.length = 0x0010;
647 sei->request.code = 0x000e;
648 if (!ntsm_unsupported)
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);
658 if (sei->response.code == 3 && sei->ntsm) {
659 /* Fallback for old firmware. */
660 ntsm_unsupported = 1;
666 CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
669 chsc_process_sei_nt0(&sei->u.nt0_area);
672 chsc_process_sei_nt2(&sei->u.nt2_area);
675 CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
679 if (!(sei->u.nt0_area.flags & 0x80))
685 * Handle channel subsystem related CRWs.
686 * Use store event information to find out what's going on.
688 * Note: Access to sei_page is serialized through machine check handler
689 * thread, so no need for locking.
691 static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
693 struct chsc_sei *sei = sei_page;
696 css_schedule_eval_all();
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);
704 CIO_TRACE_EVENT(2, "prcss");
705 chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
708 void chsc_chp_online(struct chp_id chpid)
710 struct channel_path *chp = chpid_to_chp(chpid);
711 struct chp_link link;
714 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
715 CIO_TRACE_EVENT(2, dbf_txt);
717 if (chp_get_status(chpid) != 0) {
718 memset(&link, 0, sizeof(struct chp_link));
720 /* Wait until previous actions have settled. */
721 css_wait_for_slow_path();
723 mutex_lock(&chp->lock);
724 chp_update_desc(chp);
725 mutex_unlock(&chp->lock);
727 for_each_subchannel_staged(__s390_process_res_acc, NULL,
729 css_schedule_reprobe();
733 static void __s390_subchannel_vary_chpid(struct subchannel *sch,
734 struct chp_id chpid, int on)
737 struct chp_link link;
739 memset(&link, 0, sizeof(struct chp_link));
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);
748 static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
750 struct chp_id *chpid = data;
752 __s390_subchannel_vary_chpid(sch, *chpid, 0);
756 static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
758 struct chp_id *chpid = data;
760 __s390_subchannel_vary_chpid(sch, *chpid, 1);
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
769 int chsc_chp_vary(struct chp_id chpid, int on)
771 struct channel_path *chp = chpid_to_chp(chpid);
774 * Redo PathVerification on the devices the chpid connects to
777 /* Try to update the channel path description. */
778 chp_update_desc(chp);
779 for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
781 css_schedule_reprobe();
783 for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
790 chsc_remove_cmg_attr(struct channel_subsystem *css)
794 for (i = 0; i <= __MAX_CHPID; i++) {
797 chp_remove_cmg_attr(css->chps[i]);
802 chsc_add_cmg_attr(struct channel_subsystem *css)
807 for (i = 0; i <= __MAX_CHPID; i++) {
810 ret = chp_add_cmg_attr(css->chps[i]);
816 for (--i; i >= 0; i--) {
819 chp_remove_cmg_attr(css->chps[i]);
824 int __chsc_do_secm(struct channel_subsystem *css, int enable)
827 struct chsc_header request;
828 u32 operation_code : 2;
837 struct chsc_header response;
846 spin_lock_irqsave(&chsc_page_lock, flags);
847 memset(chsc_page, 0, PAGE_SIZE);
848 secm_area = chsc_page;
849 secm_area->request.length = 0x0050;
850 secm_area->request.code = 0x0016;
852 secm_area->key = PAGE_DEFAULT_KEY >> 4;
853 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
854 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
856 secm_area->operation_code = enable ? 0 : 1;
858 ccode = chsc(secm_area);
860 ret = (ccode == 3) ? -ENODEV : -EBUSY;
864 switch (secm_area->response.code) {
870 ret = chsc_error_from_response(secm_area->response.code);
873 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
874 secm_area->response.code);
876 spin_unlock_irqrestore(&chsc_page_lock, flags);
881 chsc_secm(struct channel_subsystem *css, int enable)
885 if (enable && !css->cm_enabled) {
886 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
887 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
888 if (!css->cub_addr1 || !css->cub_addr2) {
889 free_page((unsigned long)css->cub_addr1);
890 free_page((unsigned long)css->cub_addr2);
894 ret = __chsc_do_secm(css, enable);
896 css->cm_enabled = enable;
897 if (css->cm_enabled) {
898 ret = chsc_add_cmg_attr(css);
900 __chsc_do_secm(css, 0);
904 chsc_remove_cmg_attr(css);
906 if (!css->cm_enabled) {
907 free_page((unsigned long)css->cub_addr1);
908 free_page((unsigned long)css->cub_addr2);
913 int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
914 int c, int m, void *page)
916 struct chsc_scpd *scpd_area;
919 if ((rfmt == 1 || rfmt == 0) && c == 1 &&
920 !css_general_characteristics.fcs)
922 if ((rfmt == 2) && !css_general_characteristics.cib)
924 if ((rfmt == 3) && !css_general_characteristics.util_str)
927 memset(page, 0, PAGE_SIZE);
929 scpd_area->request.length = 0x0010;
930 scpd_area->request.code = 0x0002;
931 scpd_area->cssid = chpid.cssid;
932 scpd_area->first_chpid = chpid.id;
933 scpd_area->last_chpid = chpid.id;
936 scpd_area->fmt = fmt;
937 scpd_area->rfmt = rfmt;
939 ccode = chsc(scpd_area);
941 return (ccode == 3) ? -ENODEV : -EBUSY;
943 ret = chsc_error_from_response(scpd_area->response.code);
945 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
946 scpd_area->response.code);
949 EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
951 #define chsc_det_chp_desc(FMT, c) \
952 int chsc_determine_fmt##FMT##_channel_path_desc( \
953 struct chp_id chpid, struct channel_path_desc_fmt##FMT *desc) \
955 struct chsc_scpd *scpd_area; \
956 unsigned long flags; \
959 spin_lock_irqsave(&chsc_page_lock, flags); \
960 scpd_area = chsc_page; \
961 ret = chsc_determine_channel_path_desc(chpid, 0, FMT, c, 0, \
966 memcpy(desc, scpd_area->data, sizeof(*desc)); \
968 spin_unlock_irqrestore(&chsc_page_lock, flags); \
972 chsc_det_chp_desc(0, 0)
973 chsc_det_chp_desc(1, 1)
974 chsc_det_chp_desc(3, 0)
977 chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
978 struct cmg_chars *chars)
982 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
983 mask = 0x80 >> (i + 3);
985 chp->cmg_chars.values[i] = chars->values[i];
987 chp->cmg_chars.values[i] = 0;
991 int chsc_get_channel_measurement_chars(struct channel_path *chp)
997 struct chsc_header request;
1003 struct chsc_header response;
1014 u32 data[NR_MEASUREMENT_CHARS];
1020 if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm)
1023 spin_lock_irqsave(&chsc_page_lock, flags);
1024 memset(chsc_page, 0, PAGE_SIZE);
1025 scmc_area = chsc_page;
1026 scmc_area->request.length = 0x0010;
1027 scmc_area->request.code = 0x0022;
1028 scmc_area->first_chpid = chp->chpid.id;
1029 scmc_area->last_chpid = chp->chpid.id;
1031 ccode = chsc(scmc_area);
1033 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1037 ret = chsc_error_from_response(scmc_area->response.code);
1039 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
1040 scmc_area->response.code);
1043 if (scmc_area->not_valid)
1046 chp->cmg = scmc_area->cmg;
1047 chp->shared = scmc_area->shared;
1048 if (chp->cmg != 2 && chp->cmg != 3) {
1049 /* No cmg-dependent data. */
1052 chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
1053 (struct cmg_chars *) &scmc_area->data);
1055 spin_unlock_irqrestore(&chsc_page_lock, flags);
1059 int __init chsc_init(void)
1063 sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
1064 chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
1065 if (!sei_page || !chsc_page) {
1069 ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
1074 free_page((unsigned long)chsc_page);
1075 free_page((unsigned long)sei_page);
1079 void __init chsc_init_cleanup(void)
1081 crw_unregister_handler(CRW_RSC_CSS);
1082 free_page((unsigned long)chsc_page);
1083 free_page((unsigned long)sei_page);
1086 int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code)
1090 sda_area->request.length = 0x0400;
1091 sda_area->request.code = 0x0031;
1092 sda_area->operation_code = operation_code;
1094 ret = chsc(sda_area);
1096 ret = (ret == 3) ? -ENODEV : -EBUSY;
1100 switch (sda_area->response.code) {
1105 ret = chsc_error_from_response(sda_area->response.code);
1111 int chsc_enable_facility(int operation_code)
1113 struct chsc_sda_area *sda_area;
1114 unsigned long flags;
1117 spin_lock_irqsave(&chsc_page_lock, flags);
1118 memset(chsc_page, 0, PAGE_SIZE);
1119 sda_area = chsc_page;
1121 ret = __chsc_enable_facility(sda_area, operation_code);
1123 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
1124 operation_code, sda_area->response.code);
1126 spin_unlock_irqrestore(&chsc_page_lock, flags);
1130 int __init chsc_get_cssid(int idx)
1133 struct chsc_header request;
1137 struct chsc_header response;
1146 spin_lock_irq(&chsc_page_lock);
1147 memset(chsc_page, 0, PAGE_SIZE);
1148 sdcal_area = chsc_page;
1149 sdcal_area->request.length = 0x0020;
1150 sdcal_area->request.code = 0x0034;
1151 sdcal_area->atype = 4;
1153 ret = chsc(sdcal_area);
1155 ret = (ret == 3) ? -ENODEV : -EBUSY;
1159 ret = chsc_error_from_response(sdcal_area->response.code);
1161 CIO_CRW_EVENT(2, "chsc: sdcal failed (rc=%04x)\n",
1162 sdcal_area->response.code);
1166 if ((addr_t) &sdcal_area->list[idx] <
1167 (addr_t) &sdcal_area->response + sdcal_area->response.length)
1168 ret = sdcal_area->list[idx].cssid;
1172 spin_unlock_irq(&chsc_page_lock);
1176 struct css_general_char css_general_characteristics;
1177 struct css_chsc_char css_chsc_characteristics;
1180 chsc_determine_css_characteristics(void)
1182 unsigned long flags;
1185 struct chsc_header request;
1189 struct chsc_header response;
1191 u32 general_char[510];
1195 spin_lock_irqsave(&chsc_page_lock, flags);
1196 memset(chsc_page, 0, PAGE_SIZE);
1197 scsc_area = chsc_page;
1198 scsc_area->request.length = 0x0010;
1199 scsc_area->request.code = 0x0010;
1201 result = chsc(scsc_area);
1203 result = (result == 3) ? -ENODEV : -EBUSY;
1207 result = chsc_error_from_response(scsc_area->response.code);
1209 memcpy(&css_general_characteristics, scsc_area->general_char,
1210 sizeof(css_general_characteristics));
1211 memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
1212 sizeof(css_chsc_characteristics));
1214 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
1215 scsc_area->response.code);
1217 spin_unlock_irqrestore(&chsc_page_lock, flags);
1221 EXPORT_SYMBOL_GPL(css_general_characteristics);
1222 EXPORT_SYMBOL_GPL(css_chsc_characteristics);
1224 int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta)
1227 struct chsc_header request;
1229 unsigned int op : 8;
1230 unsigned int rsvd1 : 8;
1231 unsigned int ctrl : 16;
1232 unsigned int rsvd2[5];
1233 struct chsc_header response;
1234 unsigned int rsvd3[3];
1236 unsigned int rsvd4[2];
1240 memset(page, 0, PAGE_SIZE);
1242 rr->request.length = 0x0020;
1243 rr->request.code = 0x0033;
1249 rc = (rr->response.code == 0x0001) ? 0 : -EIO;
1251 *clock_delta = rr->clock_delta;
1255 int chsc_sstpi(void *page, void *result, size_t size)
1258 struct chsc_header request;
1259 unsigned int rsvd0[3];
1260 struct chsc_header response;
1265 memset(page, 0, PAGE_SIZE);
1267 rr->request.length = 0x0010;
1268 rr->request.code = 0x0038;
1272 memcpy(result, &rr->data, size);
1273 return (rr->response.code == 0x0001) ? 0 : -EIO;
1276 int chsc_siosl(struct subchannel_id schid)
1279 struct chsc_header request;
1281 struct subchannel_id sid;
1283 struct chsc_header response;
1286 unsigned long flags;
1290 spin_lock_irqsave(&chsc_page_lock, flags);
1291 memset(chsc_page, 0, PAGE_SIZE);
1292 siosl_area = chsc_page;
1293 siosl_area->request.length = 0x0010;
1294 siosl_area->request.code = 0x0046;
1295 siosl_area->word1 = 0x80000000;
1296 siosl_area->sid = schid;
1298 ccode = chsc(siosl_area);
1304 CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
1305 schid.ssid, schid.sch_no, ccode);
1308 rc = chsc_error_from_response(siosl_area->response.code);
1310 CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
1311 schid.ssid, schid.sch_no,
1312 siosl_area->response.code);
1314 CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
1315 schid.ssid, schid.sch_no);
1317 spin_unlock_irqrestore(&chsc_page_lock, flags);
1320 EXPORT_SYMBOL_GPL(chsc_siosl);
1323 * chsc_scm_info() - store SCM information (SSI)
1324 * @scm_area: request and response block for SSI
1325 * @token: continuation token
1327 * Returns 0 on success.
1329 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
1333 memset(scm_area, 0, sizeof(*scm_area));
1334 scm_area->request.length = 0x0020;
1335 scm_area->request.code = 0x004C;
1336 scm_area->reqtok = token;
1338 ccode = chsc(scm_area);
1340 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1343 ret = chsc_error_from_response(scm_area->response.code);
1345 CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",
1346 scm_area->response.code);
1350 EXPORT_SYMBOL_GPL(chsc_scm_info);
1353 * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info.
1354 * @schid: id of the subchannel on which PNSO is performed
1355 * @brinfo_area: request and response block for the operation
1356 * @resume_token: resume token for multiblock response
1357 * @cnc: Boolean change-notification control
1359 * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
1361 * Returns 0 on success.
1363 int chsc_pnso_brinfo(struct subchannel_id schid,
1364 struct chsc_pnso_area *brinfo_area,
1365 struct chsc_brinfo_resume_token resume_token,
1368 memset(brinfo_area, 0, sizeof(*brinfo_area));
1369 brinfo_area->request.length = 0x0030;
1370 brinfo_area->request.code = 0x003d; /* network-subchannel operation */
1371 brinfo_area->m = schid.m;
1372 brinfo_area->ssid = schid.ssid;
1373 brinfo_area->sch = schid.sch_no;
1374 brinfo_area->cssid = schid.cssid;
1375 brinfo_area->oc = 0; /* Store-network-bridging-information list */
1376 brinfo_area->resume_token = resume_token;
1377 brinfo_area->n = (cnc != 0);
1378 if (chsc(brinfo_area))
1380 return chsc_error_from_response(brinfo_area->response.code);
1382 EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);