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/pci.h>
20 #include <asm/chpid.h>
27 #include "cio_debug.h"
32 static void *sei_page;
33 static void *chsc_page;
34 static DEFINE_SPINLOCK(chsc_page_lock);
37 * chsc_error_from_response() - convert a chsc response to an error
38 * @response: chsc response code
40 * Returns an appropriate Linux error code for @response.
42 int chsc_error_from_response(int response)
66 EXPORT_SYMBOL_GPL(chsc_error_from_response);
68 struct chsc_ssd_area {
69 struct chsc_header request;
73 u16 f_sch; /* first subchannel */
75 u16 l_sch; /* last subchannel */
77 struct chsc_header response;
81 u8 st : 3; /* subchannel type */
83 u8 unit_addr; /* unit address */
84 u16 devno; /* device number */
87 u16 sch; /* subchannel */
88 u8 chpid[8]; /* chpids 0-7 */
89 u16 fla[8]; /* full link addresses 0-7 */
90 } __attribute__ ((packed));
92 int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
94 struct chsc_ssd_area *ssd_area;
100 spin_lock_irq(&chsc_page_lock);
101 memset(chsc_page, 0, PAGE_SIZE);
102 ssd_area = chsc_page;
103 ssd_area->request.length = 0x0010;
104 ssd_area->request.code = 0x0004;
105 ssd_area->ssid = schid.ssid;
106 ssd_area->f_sch = schid.sch_no;
107 ssd_area->l_sch = schid.sch_no;
109 ccode = chsc(ssd_area);
110 /* Check response. */
112 ret = (ccode == 3) ? -ENODEV : -EBUSY;
115 ret = chsc_error_from_response(ssd_area->response.code);
117 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
118 schid.ssid, schid.sch_no,
119 ssd_area->response.code);
122 if (!ssd_area->sch_valid) {
128 memset(ssd, 0, sizeof(struct chsc_ssd_info));
129 if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
130 (ssd_area->st != SUBCHANNEL_TYPE_MSG))
132 ssd->path_mask = ssd_area->path_mask;
133 ssd->fla_valid_mask = ssd_area->fla_valid_mask;
134 for (i = 0; i < 8; i++) {
136 if (ssd_area->path_mask & mask) {
137 chp_id_init(&ssd->chpid[i]);
138 ssd->chpid[i].id = ssd_area->chpid[i];
140 if (ssd_area->fla_valid_mask & mask)
141 ssd->fla[i] = ssd_area->fla[i];
144 spin_unlock_irq(&chsc_page_lock);
149 * chsc_ssqd() - store subchannel QDIO data (SSQD)
150 * @schid: id of the subchannel on which SSQD is performed
151 * @ssqd: request and response block for SSQD
153 * Returns 0 on success.
155 int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd)
157 memset(ssqd, 0, sizeof(*ssqd));
158 ssqd->request.length = 0x0010;
159 ssqd->request.code = 0x0024;
160 ssqd->first_sch = schid.sch_no;
161 ssqd->last_sch = schid.sch_no;
162 ssqd->ssid = schid.ssid;
167 return chsc_error_from_response(ssqd->response.code);
169 EXPORT_SYMBOL_GPL(chsc_ssqd);
172 * chsc_sadc() - set adapter device controls (SADC)
173 * @schid: id of the subchannel on which SADC is performed
174 * @scssc: request and response block for SADC
175 * @summary_indicator_addr: summary indicator address
176 * @subchannel_indicator_addr: subchannel indicator address
178 * Returns 0 on success.
180 int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
181 u64 summary_indicator_addr, u64 subchannel_indicator_addr)
183 memset(scssc, 0, sizeof(*scssc));
184 scssc->request.length = 0x0fe0;
185 scssc->request.code = 0x0021;
186 scssc->operation_code = 0;
188 scssc->summary_indicator_addr = summary_indicator_addr;
189 scssc->subchannel_indicator_addr = subchannel_indicator_addr;
191 scssc->ks = PAGE_DEFAULT_KEY >> 4;
192 scssc->kc = PAGE_DEFAULT_KEY >> 4;
193 scssc->isc = QDIO_AIRQ_ISC;
194 scssc->schid = schid;
196 /* enable the time delay disablement facility */
197 if (css_general_characteristics.aif_tdd)
198 scssc->word_with_d_bit = 0x10000000;
203 return chsc_error_from_response(scssc->response.code);
205 EXPORT_SYMBOL_GPL(chsc_sadc);
207 static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
209 spin_lock_irq(sch->lock);
210 if (sch->driver && sch->driver->chp_event)
211 if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0)
213 spin_unlock_irq(sch->lock);
218 spin_unlock_irq(sch->lock);
219 css_schedule_eval(sch->schid);
223 void chsc_chp_offline(struct chp_id chpid)
226 struct chp_link link;
228 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
229 CIO_TRACE_EVENT(2, dbf_txt);
231 if (chp_get_status(chpid) <= 0)
233 memset(&link, 0, sizeof(struct chp_link));
235 /* Wait until previous actions have settled. */
236 css_wait_for_slow_path();
237 for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
240 static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data)
244 * We don't know the device yet, but since a path
245 * may be available now to the device we'll have
246 * to do recognition again.
247 * Since we don't have any idea about which chpid
248 * that beast may be on we'll have to do a stsch
249 * on all devices, grr...
251 if (stsch_err(schid, &schib))
255 /* Put it on the slow path. */
256 css_schedule_eval(schid);
260 static int __s390_process_res_acc(struct subchannel *sch, void *data)
262 spin_lock_irq(sch->lock);
263 if (sch->driver && sch->driver->chp_event)
264 sch->driver->chp_event(sch, data, CHP_ONLINE);
265 spin_unlock_irq(sch->lock);
270 static void s390_process_res_acc(struct chp_link *link)
274 sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
276 CIO_TRACE_EVENT( 2, dbf_txt);
277 if (link->fla != 0) {
278 sprintf(dbf_txt, "fla%x", link->fla);
279 CIO_TRACE_EVENT( 2, dbf_txt);
281 /* Wait until previous actions have settled. */
282 css_wait_for_slow_path();
284 * I/O resources may have become accessible.
285 * Scan through all subchannels that may be concerned and
286 * do a validation on those.
287 * The more information we have (info), the less scanning
288 * will we have to do.
290 for_each_subchannel_staged(__s390_process_res_acc,
291 s390_process_res_acc_new_sch, link);
295 __get_chpid_from_lir(void *data)
301 /* incident-node descriptor */
303 /* attached-node descriptor */
305 /* incident-specific information */
307 } __attribute__ ((packed)) *lir;
311 /* NULL link incident record */
313 if (!(lir->indesc[0]&0xc0000000))
314 /* node descriptor not valid */
316 if (!(lir->indesc[0]&0x10000000))
317 /* don't handle device-type nodes - FIXME */
319 /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */
321 return (u16) (lir->indesc[0]&0x000000ff);
324 struct chsc_sei_nt0_area {
326 u8 vf; /* validity flags */
327 u8 rs; /* reporting source */
328 u8 cc; /* content code */
329 u16 fla; /* full link address */
330 u16 rsid; /* reporting source id */
333 /* ccdf has to be big enough for a link-incident record */
334 u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */
337 struct chsc_sei_nt2_area {
338 u8 flags; /* p and v bit */
341 u8 cc; /* content code */
343 u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */
346 #define CHSC_SEI_NT0 (1ULL << 63)
347 #define CHSC_SEI_NT2 (1ULL << 61)
350 struct chsc_header request;
352 u64 ntsm; /* notification type mask */
353 struct chsc_header response;
357 struct chsc_sei_nt0_area nt0_area;
358 struct chsc_sei_nt2_area nt2_area;
359 u8 nt_area[PAGE_SIZE - 24];
363 static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
368 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
369 sei_area->rs, sei_area->rsid);
370 if (sei_area->rs != 4)
372 id = __get_chpid_from_lir(sei_area->ccdf);
374 CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
378 chsc_chp_offline(chpid);
382 static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
384 struct chp_link link;
388 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
389 "rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
390 if (sei_area->rs != 4)
393 chpid.id = sei_area->rsid;
394 /* allocate a new channel path structure, if needed */
395 status = chp_get_status(chpid);
400 memset(&link, 0, sizeof(struct chp_link));
402 if ((sei_area->vf & 0xc0) != 0) {
403 link.fla = sei_area->fla;
404 if ((sei_area->vf & 0xc0) == 0xc0)
405 /* full link address */
406 link.fla_mask = 0xffff;
409 link.fla_mask = 0xff00;
411 s390_process_res_acc(&link);
414 static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area)
416 struct channel_path *chp;
421 CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
422 if (sei_area->rs != 0)
424 data = sei_area->ccdf;
426 for (num = 0; num <= __MAX_CHPID; num++) {
427 if (!chp_test_bit(data, num))
431 CIO_CRW_EVENT(4, "Update information for channel path "
432 "%x.%02x\n", chpid.cssid, chpid.id);
433 chp = chpid_to_chp(chpid);
438 mutex_lock(&chp->lock);
439 chp_update_desc(chp);
440 mutex_unlock(&chp->lock);
444 struct chp_config_data {
450 static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area)
452 struct chp_config_data *data;
455 char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
457 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
458 if (sei_area->rs != 0)
460 data = (struct chp_config_data *) &(sei_area->ccdf);
462 for (num = 0; num <= __MAX_CHPID; num++) {
463 if (!chp_test_bit(data->map, num))
466 pr_notice("Processing %s for channel path %x.%02x\n",
467 events[data->op], chpid.cssid, chpid.id);
470 chp_cfg_schedule(chpid, 1);
473 chp_cfg_schedule(chpid, 0);
476 chp_cfg_cancel_deconfigure(chpid);
482 static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
486 CIO_CRW_EVENT(4, "chsc: scm change notification\n");
487 if (sei_area->rs != 7)
490 ret = scm_update_information();
492 CIO_CRW_EVENT(0, "chsc: updating change notification"
493 " failed (rc=%d).\n", ret);
496 static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
500 CIO_CRW_EVENT(4, "chsc: scm available information\n");
501 if (sei_area->rs != 7)
504 ret = scm_process_availability_information();
506 CIO_CRW_EVENT(0, "chsc: process availability information"
507 " failed (rc=%d).\n", ret);
510 static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
512 switch (sei_area->cc) {
514 zpci_event_error(sei_area->ccdf);
517 zpci_event_availability(sei_area->ccdf);
520 CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n",
526 static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
528 /* which kind of information was stored? */
529 switch (sei_area->cc) {
530 case 1: /* link incident*/
531 chsc_process_sei_link_incident(sei_area);
533 case 2: /* i/o resource accessibility */
534 chsc_process_sei_res_acc(sei_area);
536 case 7: /* channel-path-availability information */
537 chsc_process_sei_chp_avail(sei_area);
539 case 8: /* channel-path-configuration notification */
540 chsc_process_sei_chp_config(sei_area);
542 case 12: /* scm change notification */
543 chsc_process_sei_scm_change(sei_area);
545 case 14: /* scm available notification */
546 chsc_process_sei_scm_avail(sei_area);
548 default: /* other stuff */
549 CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
554 /* Check if we might have lost some information. */
555 if (sei_area->flags & 0x40) {
556 CIO_CRW_EVENT(2, "chsc: event overflow\n");
557 css_schedule_eval_all();
561 static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
564 memset(sei, 0, sizeof(*sei));
565 sei->request.length = 0x0010;
566 sei->request.code = 0x000e;
572 if (sei->response.code != 0x0001) {
573 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
578 CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
581 chsc_process_sei_nt0(&sei->u.nt0_area);
584 chsc_process_sei_nt2(&sei->u.nt2_area);
587 CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
590 } while (sei->u.nt0_area.flags & 0x80);
594 * Handle channel subsystem related CRWs.
595 * Use store event information to find out what's going on.
597 * Note: Access to sei_page is serialized through machine check handler
598 * thread, so no need for locking.
600 static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
602 struct chsc_sei *sei = sei_page;
605 css_schedule_eval_all();
608 CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
609 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
610 crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
611 crw0->erc, crw0->rsid);
613 CIO_TRACE_EVENT(2, "prcss");
614 chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
617 void chsc_chp_online(struct chp_id chpid)
620 struct chp_link link;
622 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
623 CIO_TRACE_EVENT(2, dbf_txt);
625 if (chp_get_status(chpid) != 0) {
626 memset(&link, 0, sizeof(struct chp_link));
628 /* Wait until previous actions have settled. */
629 css_wait_for_slow_path();
630 for_each_subchannel_staged(__s390_process_res_acc, NULL,
635 static void __s390_subchannel_vary_chpid(struct subchannel *sch,
636 struct chp_id chpid, int on)
639 struct chp_link link;
641 memset(&link, 0, sizeof(struct chp_link));
643 spin_lock_irqsave(sch->lock, flags);
644 if (sch->driver && sch->driver->chp_event)
645 sch->driver->chp_event(sch, &link,
646 on ? CHP_VARY_ON : CHP_VARY_OFF);
647 spin_unlock_irqrestore(sch->lock, flags);
650 static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
652 struct chp_id *chpid = data;
654 __s390_subchannel_vary_chpid(sch, *chpid, 0);
658 static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
660 struct chp_id *chpid = data;
662 __s390_subchannel_vary_chpid(sch, *chpid, 1);
667 __s390_vary_chpid_on(struct subchannel_id schid, void *data)
671 if (stsch_err(schid, &schib))
674 /* Put it on the slow path. */
675 css_schedule_eval(schid);
680 * chsc_chp_vary - propagate channel-path vary operation to subchannels
681 * @chpid: channl-path ID
682 * @on: non-zero for vary online, zero for vary offline
684 int chsc_chp_vary(struct chp_id chpid, int on)
686 struct channel_path *chp = chpid_to_chp(chpid);
688 /* Wait until previous actions have settled. */
689 css_wait_for_slow_path();
691 * Redo PathVerification on the devices the chpid connects to
694 /* Try to update the channel path description. */
695 chp_update_desc(chp);
696 for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
697 __s390_vary_chpid_on, &chpid);
699 for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
706 chsc_remove_cmg_attr(struct channel_subsystem *css)
710 for (i = 0; i <= __MAX_CHPID; i++) {
713 chp_remove_cmg_attr(css->chps[i]);
718 chsc_add_cmg_attr(struct channel_subsystem *css)
723 for (i = 0; i <= __MAX_CHPID; i++) {
726 ret = chp_add_cmg_attr(css->chps[i]);
732 for (--i; i >= 0; i--) {
735 chp_remove_cmg_attr(css->chps[i]);
740 int __chsc_do_secm(struct channel_subsystem *css, int enable)
743 struct chsc_header request;
744 u32 operation_code : 2;
753 struct chsc_header response;
758 } __attribute__ ((packed)) *secm_area;
761 spin_lock_irq(&chsc_page_lock);
762 memset(chsc_page, 0, PAGE_SIZE);
763 secm_area = chsc_page;
764 secm_area->request.length = 0x0050;
765 secm_area->request.code = 0x0016;
767 secm_area->key = PAGE_DEFAULT_KEY >> 4;
768 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
769 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
771 secm_area->operation_code = enable ? 0 : 1;
773 ccode = chsc(secm_area);
775 ret = (ccode == 3) ? -ENODEV : -EBUSY;
779 switch (secm_area->response.code) {
785 ret = chsc_error_from_response(secm_area->response.code);
788 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
789 secm_area->response.code);
791 spin_unlock_irq(&chsc_page_lock);
796 chsc_secm(struct channel_subsystem *css, int enable)
800 if (enable && !css->cm_enabled) {
801 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
802 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
803 if (!css->cub_addr1 || !css->cub_addr2) {
804 free_page((unsigned long)css->cub_addr1);
805 free_page((unsigned long)css->cub_addr2);
809 ret = __chsc_do_secm(css, enable);
811 css->cm_enabled = enable;
812 if (css->cm_enabled) {
813 ret = chsc_add_cmg_attr(css);
815 __chsc_do_secm(css, 0);
819 chsc_remove_cmg_attr(css);
821 if (!css->cm_enabled) {
822 free_page((unsigned long)css->cub_addr1);
823 free_page((unsigned long)css->cub_addr2);
828 int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
829 int c, int m, void *page)
831 struct chsc_scpd *scpd_area;
834 if ((rfmt == 1) && !css_general_characteristics.fcs)
836 if ((rfmt == 2) && !css_general_characteristics.cib)
839 memset(page, 0, PAGE_SIZE);
841 scpd_area->request.length = 0x0010;
842 scpd_area->request.code = 0x0002;
843 scpd_area->cssid = chpid.cssid;
844 scpd_area->first_chpid = chpid.id;
845 scpd_area->last_chpid = chpid.id;
848 scpd_area->fmt = fmt;
849 scpd_area->rfmt = rfmt;
851 ccode = chsc(scpd_area);
853 return (ccode == 3) ? -ENODEV : -EBUSY;
855 ret = chsc_error_from_response(scpd_area->response.code);
857 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
858 scpd_area->response.code);
861 EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
863 int chsc_determine_base_channel_path_desc(struct chp_id chpid,
864 struct channel_path_desc *desc)
866 struct chsc_response_struct *chsc_resp;
867 struct chsc_scpd *scpd_area;
871 spin_lock_irqsave(&chsc_page_lock, flags);
872 scpd_area = chsc_page;
873 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area);
876 chsc_resp = (void *)&scpd_area->response;
877 memcpy(desc, &chsc_resp->data, sizeof(*desc));
879 spin_unlock_irqrestore(&chsc_page_lock, flags);
883 int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
884 struct channel_path_desc_fmt1 *desc)
886 struct chsc_response_struct *chsc_resp;
887 struct chsc_scpd *scpd_area;
891 spin_lock_irqsave(&chsc_page_lock, flags);
892 scpd_area = chsc_page;
893 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area);
896 chsc_resp = (void *)&scpd_area->response;
897 memcpy(desc, &chsc_resp->data, sizeof(*desc));
899 spin_unlock_irqrestore(&chsc_page_lock, flags);
904 chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
905 struct cmg_chars *chars)
907 struct cmg_chars *cmg_chars;
910 cmg_chars = chp->cmg_chars;
911 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
912 mask = 0x80 >> (i + 3);
914 cmg_chars->values[i] = chars->values[i];
916 cmg_chars->values[i] = 0;
920 int chsc_get_channel_measurement_chars(struct channel_path *chp)
922 struct cmg_chars *cmg_chars;
926 struct chsc_header request;
932 struct chsc_header response;
943 u32 data[NR_MEASUREMENT_CHARS];
944 } __attribute__ ((packed)) *scmc_area;
946 chp->cmg_chars = NULL;
947 cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL);
951 spin_lock_irq(&chsc_page_lock);
952 memset(chsc_page, 0, PAGE_SIZE);
953 scmc_area = chsc_page;
954 scmc_area->request.length = 0x0010;
955 scmc_area->request.code = 0x0022;
956 scmc_area->first_chpid = chp->chpid.id;
957 scmc_area->last_chpid = chp->chpid.id;
959 ccode = chsc(scmc_area);
961 ret = (ccode == 3) ? -ENODEV : -EBUSY;
965 ret = chsc_error_from_response(scmc_area->response.code);
967 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
968 scmc_area->response.code);
971 if (scmc_area->not_valid) {
976 chp->cmg = scmc_area->cmg;
977 chp->shared = scmc_area->shared;
978 if (chp->cmg != 2 && chp->cmg != 3) {
979 /* No cmg-dependent data. */
982 chp->cmg_chars = cmg_chars;
983 chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
984 (struct cmg_chars *) &scmc_area->data);
986 spin_unlock_irq(&chsc_page_lock);
993 int __init chsc_init(void)
997 sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
998 chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
999 if (!sei_page || !chsc_page) {
1003 ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
1008 free_page((unsigned long)chsc_page);
1009 free_page((unsigned long)sei_page);
1013 void __init chsc_init_cleanup(void)
1015 crw_unregister_handler(CRW_RSC_CSS);
1016 free_page((unsigned long)chsc_page);
1017 free_page((unsigned long)sei_page);
1020 int chsc_enable_facility(int operation_code)
1022 unsigned long flags;
1025 struct chsc_header request;
1032 u32 operation_data_area[252];
1033 struct chsc_header response;
1037 } __attribute__ ((packed)) *sda_area;
1039 spin_lock_irqsave(&chsc_page_lock, flags);
1040 memset(chsc_page, 0, PAGE_SIZE);
1041 sda_area = chsc_page;
1042 sda_area->request.length = 0x0400;
1043 sda_area->request.code = 0x0031;
1044 sda_area->operation_code = operation_code;
1046 ret = chsc(sda_area);
1048 ret = (ret == 3) ? -ENODEV : -EBUSY;
1052 switch (sda_area->response.code) {
1057 ret = chsc_error_from_response(sda_area->response.code);
1060 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
1061 operation_code, sda_area->response.code);
1063 spin_unlock_irqrestore(&chsc_page_lock, flags);
1067 struct css_general_char css_general_characteristics;
1068 struct css_chsc_char css_chsc_characteristics;
1071 chsc_determine_css_characteristics(void)
1075 struct chsc_header request;
1079 struct chsc_header response;
1081 u32 general_char[510];
1083 } __attribute__ ((packed)) *scsc_area;
1085 spin_lock_irq(&chsc_page_lock);
1086 memset(chsc_page, 0, PAGE_SIZE);
1087 scsc_area = chsc_page;
1088 scsc_area->request.length = 0x0010;
1089 scsc_area->request.code = 0x0010;
1091 result = chsc(scsc_area);
1093 result = (result == 3) ? -ENODEV : -EBUSY;
1097 result = chsc_error_from_response(scsc_area->response.code);
1099 memcpy(&css_general_characteristics, scsc_area->general_char,
1100 sizeof(css_general_characteristics));
1101 memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
1102 sizeof(css_chsc_characteristics));
1104 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
1105 scsc_area->response.code);
1107 spin_unlock_irq(&chsc_page_lock);
1111 EXPORT_SYMBOL_GPL(css_general_characteristics);
1112 EXPORT_SYMBOL_GPL(css_chsc_characteristics);
1114 int chsc_sstpc(void *page, unsigned int op, u16 ctrl)
1117 struct chsc_header request;
1119 unsigned int op : 8;
1120 unsigned int rsvd1 : 8;
1121 unsigned int ctrl : 16;
1122 unsigned int rsvd2[5];
1123 struct chsc_header response;
1124 unsigned int rsvd3[7];
1125 } __attribute__ ((packed)) *rr;
1128 memset(page, 0, PAGE_SIZE);
1130 rr->request.length = 0x0020;
1131 rr->request.code = 0x0033;
1137 rc = (rr->response.code == 0x0001) ? 0 : -EIO;
1141 int chsc_sstpi(void *page, void *result, size_t size)
1144 struct chsc_header request;
1145 unsigned int rsvd0[3];
1146 struct chsc_header response;
1148 } __attribute__ ((packed)) *rr;
1151 memset(page, 0, PAGE_SIZE);
1153 rr->request.length = 0x0010;
1154 rr->request.code = 0x0038;
1158 memcpy(result, &rr->data, size);
1159 return (rr->response.code == 0x0001) ? 0 : -EIO;
1162 int chsc_siosl(struct subchannel_id schid)
1165 struct chsc_header request;
1167 struct subchannel_id sid;
1169 struct chsc_header response;
1171 } __attribute__ ((packed)) *siosl_area;
1172 unsigned long flags;
1176 spin_lock_irqsave(&chsc_page_lock, flags);
1177 memset(chsc_page, 0, PAGE_SIZE);
1178 siosl_area = chsc_page;
1179 siosl_area->request.length = 0x0010;
1180 siosl_area->request.code = 0x0046;
1181 siosl_area->word1 = 0x80000000;
1182 siosl_area->sid = schid;
1184 ccode = chsc(siosl_area);
1190 CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
1191 schid.ssid, schid.sch_no, ccode);
1194 rc = chsc_error_from_response(siosl_area->response.code);
1196 CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
1197 schid.ssid, schid.sch_no,
1198 siosl_area->response.code);
1200 CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
1201 schid.ssid, schid.sch_no);
1203 spin_unlock_irqrestore(&chsc_page_lock, flags);
1206 EXPORT_SYMBOL_GPL(chsc_siosl);
1209 * chsc_scm_info() - store SCM information (SSI)
1210 * @scm_area: request and response block for SSI
1211 * @token: continuation token
1213 * Returns 0 on success.
1215 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
1219 memset(scm_area, 0, sizeof(*scm_area));
1220 scm_area->request.length = 0x0020;
1221 scm_area->request.code = 0x004C;
1222 scm_area->reqtok = token;
1224 ccode = chsc(scm_area);
1226 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1229 ret = chsc_error_from_response(scm_area->response.code);
1231 CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",
1232 scm_area->response.code);
1236 EXPORT_SYMBOL_GPL(chsc_scm_info);