2 * S/390 common I/O routines -- channel subsystem call
4 * Copyright IBM Corp. 1999, 2010
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>
19 #include <asm/chpid.h>
25 #include "cio_debug.h"
30 static void *sei_page;
31 static void *chsc_page;
32 static DEFINE_SPINLOCK(chsc_page_lock);
35 * chsc_error_from_response() - convert a chsc response to an error
36 * @response: chsc response code
38 * Returns an appropriate Linux error code for @response.
40 int chsc_error_from_response(int response)
59 EXPORT_SYMBOL_GPL(chsc_error_from_response);
61 struct chsc_ssd_area {
62 struct chsc_header request;
66 u16 f_sch; /* first subchannel */
68 u16 l_sch; /* last subchannel */
70 struct chsc_header response;
74 u8 st : 3; /* subchannel type */
76 u8 unit_addr; /* unit address */
77 u16 devno; /* device number */
80 u16 sch; /* subchannel */
81 u8 chpid[8]; /* chpids 0-7 */
82 u16 fla[8]; /* full link addresses 0-7 */
83 } __attribute__ ((packed));
85 int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
87 struct chsc_ssd_area *ssd_area;
93 spin_lock_irq(&chsc_page_lock);
94 memset(chsc_page, 0, PAGE_SIZE);
96 ssd_area->request.length = 0x0010;
97 ssd_area->request.code = 0x0004;
98 ssd_area->ssid = schid.ssid;
99 ssd_area->f_sch = schid.sch_no;
100 ssd_area->l_sch = schid.sch_no;
102 ccode = chsc(ssd_area);
103 /* Check response. */
105 ret = (ccode == 3) ? -ENODEV : -EBUSY;
108 ret = chsc_error_from_response(ssd_area->response.code);
110 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
111 schid.ssid, schid.sch_no,
112 ssd_area->response.code);
115 if (!ssd_area->sch_valid) {
121 memset(ssd, 0, sizeof(struct chsc_ssd_info));
122 if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
123 (ssd_area->st != SUBCHANNEL_TYPE_MSG))
125 ssd->path_mask = ssd_area->path_mask;
126 ssd->fla_valid_mask = ssd_area->fla_valid_mask;
127 for (i = 0; i < 8; i++) {
129 if (ssd_area->path_mask & mask) {
130 chp_id_init(&ssd->chpid[i]);
131 ssd->chpid[i].id = ssd_area->chpid[i];
133 if (ssd_area->fla_valid_mask & mask)
134 ssd->fla[i] = ssd_area->fla[i];
137 spin_unlock_irq(&chsc_page_lock);
141 static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
143 spin_lock_irq(sch->lock);
144 if (sch->driver && sch->driver->chp_event)
145 if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0)
147 spin_unlock_irq(sch->lock);
152 spin_unlock_irq(sch->lock);
153 css_schedule_eval(sch->schid);
157 void chsc_chp_offline(struct chp_id chpid)
160 struct chp_link link;
162 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
163 CIO_TRACE_EVENT(2, dbf_txt);
165 if (chp_get_status(chpid) <= 0)
167 memset(&link, 0, sizeof(struct chp_link));
169 /* Wait until previous actions have settled. */
170 css_wait_for_slow_path();
171 for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
174 static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data)
178 * We don't know the device yet, but since a path
179 * may be available now to the device we'll have
180 * to do recognition again.
181 * Since we don't have any idea about which chpid
182 * that beast may be on we'll have to do a stsch
183 * on all devices, grr...
185 if (stsch_err(schid, &schib))
189 /* Put it on the slow path. */
190 css_schedule_eval(schid);
194 static int __s390_process_res_acc(struct subchannel *sch, void *data)
196 spin_lock_irq(sch->lock);
197 if (sch->driver && sch->driver->chp_event)
198 sch->driver->chp_event(sch, data, CHP_ONLINE);
199 spin_unlock_irq(sch->lock);
204 static void s390_process_res_acc(struct chp_link *link)
208 sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
210 CIO_TRACE_EVENT( 2, dbf_txt);
211 if (link->fla != 0) {
212 sprintf(dbf_txt, "fla%x", link->fla);
213 CIO_TRACE_EVENT( 2, dbf_txt);
215 /* Wait until previous actions have settled. */
216 css_wait_for_slow_path();
218 * I/O resources may have become accessible.
219 * Scan through all subchannels that may be concerned and
220 * do a validation on those.
221 * The more information we have (info), the less scanning
222 * will we have to do.
224 for_each_subchannel_staged(__s390_process_res_acc,
225 s390_process_res_acc_new_sch, link);
229 __get_chpid_from_lir(void *data)
235 /* incident-node descriptor */
237 /* attached-node descriptor */
239 /* incident-specific information */
241 } __attribute__ ((packed)) *lir;
245 /* NULL link incident record */
247 if (!(lir->indesc[0]&0xc0000000))
248 /* node descriptor not valid */
250 if (!(lir->indesc[0]&0x10000000))
251 /* don't handle device-type nodes - FIXME */
253 /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */
255 return (u16) (lir->indesc[0]&0x000000ff);
258 struct chsc_sei_area {
259 struct chsc_header request;
263 struct chsc_header response;
266 u8 vf; /* validity flags */
267 u8 rs; /* reporting source */
268 u8 cc; /* content code */
269 u16 fla; /* full link address */
270 u16 rsid; /* reporting source id */
273 u8 ccdf[4096 - 16 - 24]; /* content-code dependent field */
274 /* ccdf has to be big enough for a link-incident record */
275 } __attribute__ ((packed));
277 static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
282 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
283 sei_area->rs, sei_area->rsid);
284 if (sei_area->rs != 4)
286 id = __get_chpid_from_lir(sei_area->ccdf);
288 CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
292 chsc_chp_offline(chpid);
296 static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
298 struct chp_link link;
302 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
303 "rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
304 if (sei_area->rs != 4)
307 chpid.id = sei_area->rsid;
308 /* allocate a new channel path structure, if needed */
309 status = chp_get_status(chpid);
314 memset(&link, 0, sizeof(struct chp_link));
316 if ((sei_area->vf & 0xc0) != 0) {
317 link.fla = sei_area->fla;
318 if ((sei_area->vf & 0xc0) == 0xc0)
319 /* full link address */
320 link.fla_mask = 0xffff;
323 link.fla_mask = 0xff00;
325 s390_process_res_acc(&link);
328 static void chsc_process_sei_chp_avail(struct chsc_sei_area *sei_area)
330 struct channel_path *chp;
335 CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
336 if (sei_area->rs != 0)
338 data = sei_area->ccdf;
340 for (num = 0; num <= __MAX_CHPID; num++) {
341 if (!chp_test_bit(data, num))
345 CIO_CRW_EVENT(4, "Update information for channel path "
346 "%x.%02x\n", chpid.cssid, chpid.id);
347 chp = chpid_to_chp(chpid);
352 mutex_lock(&chp->lock);
353 chsc_determine_base_channel_path_desc(chpid, &chp->desc);
354 mutex_unlock(&chp->lock);
358 struct chp_config_data {
364 static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
366 struct chp_config_data *data;
369 char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
371 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
372 if (sei_area->rs != 0)
374 data = (struct chp_config_data *) &(sei_area->ccdf);
376 for (num = 0; num <= __MAX_CHPID; num++) {
377 if (!chp_test_bit(data->map, num))
380 pr_notice("Processing %s for channel path %x.%02x\n",
381 events[data->op], chpid.cssid, chpid.id);
384 chp_cfg_schedule(chpid, 1);
387 chp_cfg_schedule(chpid, 0);
390 chp_cfg_cancel_deconfigure(chpid);
396 static void chsc_process_sei(struct chsc_sei_area *sei_area)
398 /* Check if we might have lost some information. */
399 if (sei_area->flags & 0x40) {
400 CIO_CRW_EVENT(2, "chsc: event overflow\n");
401 css_schedule_eval_all();
403 /* which kind of information was stored? */
404 switch (sei_area->cc) {
405 case 1: /* link incident*/
406 chsc_process_sei_link_incident(sei_area);
408 case 2: /* i/o resource accessibility */
409 chsc_process_sei_res_acc(sei_area);
411 case 7: /* channel-path-availability information */
412 chsc_process_sei_chp_avail(sei_area);
414 case 8: /* channel-path-configuration notification */
415 chsc_process_sei_chp_config(sei_area);
417 default: /* other stuff */
418 CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
424 static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
426 struct chsc_sei_area *sei_area;
429 css_schedule_eval_all();
432 CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
433 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
434 crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
435 crw0->erc, crw0->rsid);
438 /* Access to sei_page is serialized through machine check handler
439 * thread, so no need for locking. */
442 CIO_TRACE_EVENT(2, "prcss");
444 memset(sei_area, 0, sizeof(*sei_area));
445 sei_area->request.length = 0x0010;
446 sei_area->request.code = 0x000e;
450 if (sei_area->response.code == 0x0001) {
451 CIO_CRW_EVENT(4, "chsc: sei successful\n");
452 chsc_process_sei(sei_area);
454 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
455 sei_area->response.code);
458 } while (sei_area->flags & 0x80);
461 void chsc_chp_online(struct chp_id chpid)
464 struct chp_link link;
466 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
467 CIO_TRACE_EVENT(2, dbf_txt);
469 if (chp_get_status(chpid) != 0) {
470 memset(&link, 0, sizeof(struct chp_link));
472 /* Wait until previous actions have settled. */
473 css_wait_for_slow_path();
474 for_each_subchannel_staged(__s390_process_res_acc, NULL,
479 static void __s390_subchannel_vary_chpid(struct subchannel *sch,
480 struct chp_id chpid, int on)
483 struct chp_link link;
485 memset(&link, 0, sizeof(struct chp_link));
487 spin_lock_irqsave(sch->lock, flags);
488 if (sch->driver && sch->driver->chp_event)
489 sch->driver->chp_event(sch, &link,
490 on ? CHP_VARY_ON : CHP_VARY_OFF);
491 spin_unlock_irqrestore(sch->lock, flags);
494 static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
496 struct chp_id *chpid = data;
498 __s390_subchannel_vary_chpid(sch, *chpid, 0);
502 static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
504 struct chp_id *chpid = data;
506 __s390_subchannel_vary_chpid(sch, *chpid, 1);
511 __s390_vary_chpid_on(struct subchannel_id schid, void *data)
515 if (stsch_err(schid, &schib))
518 /* Put it on the slow path. */
519 css_schedule_eval(schid);
524 * chsc_chp_vary - propagate channel-path vary operation to subchannels
525 * @chpid: channl-path ID
526 * @on: non-zero for vary online, zero for vary offline
528 int chsc_chp_vary(struct chp_id chpid, int on)
530 struct channel_path *chp = chpid_to_chp(chpid);
532 /* Wait until previous actions have settled. */
533 css_wait_for_slow_path();
535 * Redo PathVerification on the devices the chpid connects to
538 /* Try to update the channel path descritor. */
539 chsc_determine_base_channel_path_desc(chpid, &chp->desc);
540 for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
541 __s390_vary_chpid_on, &chpid);
543 for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
550 chsc_remove_cmg_attr(struct channel_subsystem *css)
554 for (i = 0; i <= __MAX_CHPID; i++) {
557 chp_remove_cmg_attr(css->chps[i]);
562 chsc_add_cmg_attr(struct channel_subsystem *css)
567 for (i = 0; i <= __MAX_CHPID; i++) {
570 ret = chp_add_cmg_attr(css->chps[i]);
576 for (--i; i >= 0; i--) {
579 chp_remove_cmg_attr(css->chps[i]);
584 int __chsc_do_secm(struct channel_subsystem *css, int enable)
587 struct chsc_header request;
588 u32 operation_code : 2;
597 struct chsc_header response;
602 } __attribute__ ((packed)) *secm_area;
605 spin_lock_irq(&chsc_page_lock);
606 memset(chsc_page, 0, PAGE_SIZE);
607 secm_area = chsc_page;
608 secm_area->request.length = 0x0050;
609 secm_area->request.code = 0x0016;
611 secm_area->key = PAGE_DEFAULT_KEY >> 4;
612 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
613 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
615 secm_area->operation_code = enable ? 0 : 1;
617 ccode = chsc(secm_area);
619 ret = (ccode == 3) ? -ENODEV : -EBUSY;
623 switch (secm_area->response.code) {
629 ret = chsc_error_from_response(secm_area->response.code);
632 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
633 secm_area->response.code);
635 spin_unlock_irq(&chsc_page_lock);
640 chsc_secm(struct channel_subsystem *css, int enable)
644 if (enable && !css->cm_enabled) {
645 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
646 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
647 if (!css->cub_addr1 || !css->cub_addr2) {
648 free_page((unsigned long)css->cub_addr1);
649 free_page((unsigned long)css->cub_addr2);
653 ret = __chsc_do_secm(css, enable);
655 css->cm_enabled = enable;
656 if (css->cm_enabled) {
657 ret = chsc_add_cmg_attr(css);
659 __chsc_do_secm(css, 0);
663 chsc_remove_cmg_attr(css);
665 if (!css->cm_enabled) {
666 free_page((unsigned long)css->cub_addr1);
667 free_page((unsigned long)css->cub_addr2);
672 int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
673 int c, int m, void *page)
675 struct chsc_scpd *scpd_area;
678 if ((rfmt == 1) && !css_general_characteristics.fcs)
680 if ((rfmt == 2) && !css_general_characteristics.cib)
683 memset(page, 0, PAGE_SIZE);
685 scpd_area->request.length = 0x0010;
686 scpd_area->request.code = 0x0002;
687 scpd_area->cssid = chpid.cssid;
688 scpd_area->first_chpid = chpid.id;
689 scpd_area->last_chpid = chpid.id;
692 scpd_area->fmt = fmt;
693 scpd_area->rfmt = rfmt;
695 ccode = chsc(scpd_area);
697 return (ccode == 3) ? -ENODEV : -EBUSY;
699 ret = chsc_error_from_response(scpd_area->response.code);
701 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
702 scpd_area->response.code);
705 EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
707 int chsc_determine_base_channel_path_desc(struct chp_id chpid,
708 struct channel_path_desc *desc)
710 struct chsc_response_struct *chsc_resp;
711 struct chsc_scpd *scpd_area;
715 spin_lock_irqsave(&chsc_page_lock, flags);
716 scpd_area = chsc_page;
717 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area);
720 chsc_resp = (void *)&scpd_area->response;
721 memcpy(desc, &chsc_resp->data, sizeof(*desc));
723 spin_unlock_irqrestore(&chsc_page_lock, flags);
727 int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
728 struct channel_path_desc_fmt1 *desc)
730 struct chsc_response_struct *chsc_resp;
731 struct chsc_scpd *scpd_area;
734 spin_lock_irq(&chsc_page_lock);
735 scpd_area = chsc_page;
736 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area);
739 chsc_resp = (void *)&scpd_area->response;
740 memcpy(desc, &chsc_resp->data, sizeof(*desc));
742 spin_unlock_irq(&chsc_page_lock);
747 chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
748 struct cmg_chars *chars)
750 struct cmg_chars *cmg_chars;
753 cmg_chars = chp->cmg_chars;
754 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
755 mask = 0x80 >> (i + 3);
757 cmg_chars->values[i] = chars->values[i];
759 cmg_chars->values[i] = 0;
763 int chsc_get_channel_measurement_chars(struct channel_path *chp)
765 struct cmg_chars *cmg_chars;
769 struct chsc_header request;
775 struct chsc_header response;
786 u32 data[NR_MEASUREMENT_CHARS];
787 } __attribute__ ((packed)) *scmc_area;
789 chp->cmg_chars = NULL;
790 cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL);
794 spin_lock_irq(&chsc_page_lock);
795 memset(chsc_page, 0, PAGE_SIZE);
796 scmc_area = chsc_page;
797 scmc_area->request.length = 0x0010;
798 scmc_area->request.code = 0x0022;
799 scmc_area->first_chpid = chp->chpid.id;
800 scmc_area->last_chpid = chp->chpid.id;
802 ccode = chsc(scmc_area);
804 ret = (ccode == 3) ? -ENODEV : -EBUSY;
808 ret = chsc_error_from_response(scmc_area->response.code);
810 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
811 scmc_area->response.code);
814 if (scmc_area->not_valid) {
819 chp->cmg = scmc_area->cmg;
820 chp->shared = scmc_area->shared;
821 if (chp->cmg != 2 && chp->cmg != 3) {
822 /* No cmg-dependent data. */
825 chp->cmg_chars = cmg_chars;
826 chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
827 (struct cmg_chars *) &scmc_area->data);
829 spin_unlock_irq(&chsc_page_lock);
836 int __init chsc_init(void)
840 sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
841 chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
842 if (!sei_page || !chsc_page) {
846 ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
851 free_page((unsigned long)chsc_page);
852 free_page((unsigned long)sei_page);
856 void __init chsc_init_cleanup(void)
858 crw_unregister_handler(CRW_RSC_CSS);
859 free_page((unsigned long)chsc_page);
860 free_page((unsigned long)sei_page);
863 int chsc_enable_facility(int operation_code)
868 struct chsc_header request;
875 u32 operation_data_area[252];
876 struct chsc_header response;
880 } __attribute__ ((packed)) *sda_area;
882 spin_lock_irqsave(&chsc_page_lock, flags);
883 memset(chsc_page, 0, PAGE_SIZE);
884 sda_area = chsc_page;
885 sda_area->request.length = 0x0400;
886 sda_area->request.code = 0x0031;
887 sda_area->operation_code = operation_code;
889 ret = chsc(sda_area);
891 ret = (ret == 3) ? -ENODEV : -EBUSY;
895 switch (sda_area->response.code) {
900 ret = chsc_error_from_response(sda_area->response.code);
903 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
904 operation_code, sda_area->response.code);
906 spin_unlock_irqrestore(&chsc_page_lock, flags);
910 struct css_general_char css_general_characteristics;
911 struct css_chsc_char css_chsc_characteristics;
914 chsc_determine_css_characteristics(void)
918 struct chsc_header request;
922 struct chsc_header response;
924 u32 general_char[510];
926 } __attribute__ ((packed)) *scsc_area;
928 spin_lock_irq(&chsc_page_lock);
929 memset(chsc_page, 0, PAGE_SIZE);
930 scsc_area = chsc_page;
931 scsc_area->request.length = 0x0010;
932 scsc_area->request.code = 0x0010;
934 result = chsc(scsc_area);
936 result = (result == 3) ? -ENODEV : -EBUSY;
940 result = chsc_error_from_response(scsc_area->response.code);
942 memcpy(&css_general_characteristics, scsc_area->general_char,
943 sizeof(css_general_characteristics));
944 memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
945 sizeof(css_chsc_characteristics));
947 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
948 scsc_area->response.code);
950 spin_unlock_irq(&chsc_page_lock);
954 EXPORT_SYMBOL_GPL(css_general_characteristics);
955 EXPORT_SYMBOL_GPL(css_chsc_characteristics);
957 int chsc_sstpc(void *page, unsigned int op, u16 ctrl)
960 struct chsc_header request;
963 unsigned int rsvd1 : 8;
964 unsigned int ctrl : 16;
965 unsigned int rsvd2[5];
966 struct chsc_header response;
967 unsigned int rsvd3[7];
968 } __attribute__ ((packed)) *rr;
971 memset(page, 0, PAGE_SIZE);
973 rr->request.length = 0x0020;
974 rr->request.code = 0x0033;
980 rc = (rr->response.code == 0x0001) ? 0 : -EIO;
984 int chsc_sstpi(void *page, void *result, size_t size)
987 struct chsc_header request;
988 unsigned int rsvd0[3];
989 struct chsc_header response;
991 } __attribute__ ((packed)) *rr;
994 memset(page, 0, PAGE_SIZE);
996 rr->request.length = 0x0010;
997 rr->request.code = 0x0038;
1001 memcpy(result, &rr->data, size);
1002 return (rr->response.code == 0x0001) ? 0 : -EIO;
1005 int chsc_siosl(struct subchannel_id schid)
1008 struct chsc_header request;
1010 struct subchannel_id sid;
1012 struct chsc_header response;
1014 } __attribute__ ((packed)) *siosl_area;
1015 unsigned long flags;
1019 spin_lock_irqsave(&chsc_page_lock, flags);
1020 memset(chsc_page, 0, PAGE_SIZE);
1021 siosl_area = chsc_page;
1022 siosl_area->request.length = 0x0010;
1023 siosl_area->request.code = 0x0046;
1024 siosl_area->word1 = 0x80000000;
1025 siosl_area->sid = schid;
1027 ccode = chsc(siosl_area);
1033 CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
1034 schid.ssid, schid.sch_no, ccode);
1037 rc = chsc_error_from_response(siosl_area->response.code);
1039 CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
1040 schid.ssid, schid.sch_no,
1041 siosl_area->response.code);
1043 CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
1044 schid.ssid, schid.sch_no);
1046 spin_unlock_irqrestore(&chsc_page_lock, flags);
1049 EXPORT_SYMBOL_GPL(chsc_siosl);