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)
58 case 0x0107: /* "Channel busy" for the op 0x003d */
67 EXPORT_SYMBOL_GPL(chsc_error_from_response);
69 struct chsc_ssd_area {
70 struct chsc_header request;
74 u16 f_sch; /* first subchannel */
76 u16 l_sch; /* last subchannel */
78 struct chsc_header response;
82 u8 st : 3; /* subchannel type */
84 u8 unit_addr; /* unit address */
85 u16 devno; /* device number */
88 u16 sch; /* subchannel */
89 u8 chpid[8]; /* chpids 0-7 */
90 u16 fla[8]; /* full link addresses 0-7 */
91 } __attribute__ ((packed));
93 int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
95 struct chsc_ssd_area *ssd_area;
101 spin_lock_irq(&chsc_page_lock);
102 memset(chsc_page, 0, PAGE_SIZE);
103 ssd_area = chsc_page;
104 ssd_area->request.length = 0x0010;
105 ssd_area->request.code = 0x0004;
106 ssd_area->ssid = schid.ssid;
107 ssd_area->f_sch = schid.sch_no;
108 ssd_area->l_sch = schid.sch_no;
110 ccode = chsc(ssd_area);
111 /* Check response. */
113 ret = (ccode == 3) ? -ENODEV : -EBUSY;
116 ret = chsc_error_from_response(ssd_area->response.code);
118 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
119 schid.ssid, schid.sch_no,
120 ssd_area->response.code);
123 if (!ssd_area->sch_valid) {
129 memset(ssd, 0, sizeof(struct chsc_ssd_info));
130 if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
131 (ssd_area->st != SUBCHANNEL_TYPE_MSG))
133 ssd->path_mask = ssd_area->path_mask;
134 ssd->fla_valid_mask = ssd_area->fla_valid_mask;
135 for (i = 0; i < 8; i++) {
137 if (ssd_area->path_mask & mask) {
138 chp_id_init(&ssd->chpid[i]);
139 ssd->chpid[i].id = ssd_area->chpid[i];
141 if (ssd_area->fla_valid_mask & mask)
142 ssd->fla[i] = ssd_area->fla[i];
145 spin_unlock_irq(&chsc_page_lock);
150 * chsc_ssqd() - store subchannel QDIO data (SSQD)
151 * @schid: id of the subchannel on which SSQD is performed
152 * @ssqd: request and response block for SSQD
154 * Returns 0 on success.
156 int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd)
158 memset(ssqd, 0, sizeof(*ssqd));
159 ssqd->request.length = 0x0010;
160 ssqd->request.code = 0x0024;
161 ssqd->first_sch = schid.sch_no;
162 ssqd->last_sch = schid.sch_no;
163 ssqd->ssid = schid.ssid;
168 return chsc_error_from_response(ssqd->response.code);
170 EXPORT_SYMBOL_GPL(chsc_ssqd);
173 * chsc_sadc() - set adapter device controls (SADC)
174 * @schid: id of the subchannel on which SADC is performed
175 * @scssc: request and response block for SADC
176 * @summary_indicator_addr: summary indicator address
177 * @subchannel_indicator_addr: subchannel indicator address
179 * Returns 0 on success.
181 int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
182 u64 summary_indicator_addr, u64 subchannel_indicator_addr)
184 memset(scssc, 0, sizeof(*scssc));
185 scssc->request.length = 0x0fe0;
186 scssc->request.code = 0x0021;
187 scssc->operation_code = 0;
189 scssc->summary_indicator_addr = summary_indicator_addr;
190 scssc->subchannel_indicator_addr = subchannel_indicator_addr;
192 scssc->ks = PAGE_DEFAULT_KEY >> 4;
193 scssc->kc = PAGE_DEFAULT_KEY >> 4;
194 scssc->isc = QDIO_AIRQ_ISC;
195 scssc->schid = schid;
197 /* enable the time delay disablement facility */
198 if (css_general_characteristics.aif_tdd)
199 scssc->word_with_d_bit = 0x10000000;
204 return chsc_error_from_response(scssc->response.code);
206 EXPORT_SYMBOL_GPL(chsc_sadc);
208 static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
210 spin_lock_irq(sch->lock);
211 if (sch->driver && sch->driver->chp_event)
212 if (sch->driver->chp_event(sch, data, CHP_OFFLINE) != 0)
214 spin_unlock_irq(sch->lock);
219 spin_unlock_irq(sch->lock);
220 css_schedule_eval(sch->schid);
224 void chsc_chp_offline(struct chp_id chpid)
227 struct chp_link link;
229 sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
230 CIO_TRACE_EVENT(2, dbf_txt);
232 if (chp_get_status(chpid) <= 0)
234 memset(&link, 0, sizeof(struct chp_link));
236 /* Wait until previous actions have settled. */
237 css_wait_for_slow_path();
238 for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
241 static int __s390_process_res_acc(struct subchannel *sch, void *data)
243 spin_lock_irq(sch->lock);
244 if (sch->driver && sch->driver->chp_event)
245 sch->driver->chp_event(sch, data, CHP_ONLINE);
246 spin_unlock_irq(sch->lock);
251 static void s390_process_res_acc(struct chp_link *link)
255 sprintf(dbf_txt, "accpr%x.%02x", link->chpid.cssid,
257 CIO_TRACE_EVENT( 2, dbf_txt);
258 if (link->fla != 0) {
259 sprintf(dbf_txt, "fla%x", link->fla);
260 CIO_TRACE_EVENT( 2, dbf_txt);
262 /* Wait until previous actions have settled. */
263 css_wait_for_slow_path();
265 * I/O resources may have become accessible.
266 * Scan through all subchannels that may be concerned and
267 * do a validation on those.
268 * The more information we have (info), the less scanning
269 * will we have to do.
271 for_each_subchannel_staged(__s390_process_res_acc, NULL, link);
272 css_schedule_reprobe();
276 __get_chpid_from_lir(void *data)
282 /* incident-node descriptor */
284 /* attached-node descriptor */
286 /* incident-specific information */
288 } __attribute__ ((packed)) *lir;
292 /* NULL link incident record */
294 if (!(lir->indesc[0]&0xc0000000))
295 /* node descriptor not valid */
297 if (!(lir->indesc[0]&0x10000000))
298 /* don't handle device-type nodes - FIXME */
300 /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */
302 return (u16) (lir->indesc[0]&0x000000ff);
305 struct chsc_sei_nt0_area {
307 u8 vf; /* validity flags */
308 u8 rs; /* reporting source */
309 u8 cc; /* content code */
310 u16 fla; /* full link address */
311 u16 rsid; /* reporting source id */
314 /* ccdf has to be big enough for a link-incident record */
315 u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */
318 struct chsc_sei_nt2_area {
319 u8 flags; /* p and v bit */
322 u8 cc; /* content code */
324 u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */
327 #define CHSC_SEI_NT0 (1ULL << 63)
328 #define CHSC_SEI_NT2 (1ULL << 61)
331 struct chsc_header request;
333 u64 ntsm; /* notification type mask */
334 struct chsc_header response;
338 struct chsc_sei_nt0_area nt0_area;
339 struct chsc_sei_nt2_area nt2_area;
340 u8 nt_area[PAGE_SIZE - 24];
344 static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
349 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
350 sei_area->rs, sei_area->rsid);
351 if (sei_area->rs != 4)
353 id = __get_chpid_from_lir(sei_area->ccdf);
355 CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
359 chsc_chp_offline(chpid);
363 static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
365 struct chp_link link;
369 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
370 "rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
371 if (sei_area->rs != 4)
374 chpid.id = sei_area->rsid;
375 /* allocate a new channel path structure, if needed */
376 status = chp_get_status(chpid);
381 memset(&link, 0, sizeof(struct chp_link));
383 if ((sei_area->vf & 0xc0) != 0) {
384 link.fla = sei_area->fla;
385 if ((sei_area->vf & 0xc0) == 0xc0)
386 /* full link address */
387 link.fla_mask = 0xffff;
390 link.fla_mask = 0xff00;
392 s390_process_res_acc(&link);
395 static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area)
397 struct channel_path *chp;
402 CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
403 if (sei_area->rs != 0)
405 data = sei_area->ccdf;
407 for (num = 0; num <= __MAX_CHPID; num++) {
408 if (!chp_test_bit(data, num))
412 CIO_CRW_EVENT(4, "Update information for channel path "
413 "%x.%02x\n", chpid.cssid, chpid.id);
414 chp = chpid_to_chp(chpid);
419 mutex_lock(&chp->lock);
420 chp_update_desc(chp);
421 mutex_unlock(&chp->lock);
425 struct chp_config_data {
431 static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area)
433 struct chp_config_data *data;
436 char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
438 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
439 if (sei_area->rs != 0)
441 data = (struct chp_config_data *) &(sei_area->ccdf);
443 for (num = 0; num <= __MAX_CHPID; num++) {
444 if (!chp_test_bit(data->map, num))
447 pr_notice("Processing %s for channel path %x.%02x\n",
448 events[data->op], chpid.cssid, chpid.id);
451 chp_cfg_schedule(chpid, 1);
454 chp_cfg_schedule(chpid, 0);
457 chp_cfg_cancel_deconfigure(chpid);
463 static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
467 CIO_CRW_EVENT(4, "chsc: scm change notification\n");
468 if (sei_area->rs != 7)
471 ret = scm_update_information();
473 CIO_CRW_EVENT(0, "chsc: updating change notification"
474 " failed (rc=%d).\n", ret);
477 static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
481 CIO_CRW_EVENT(4, "chsc: scm available information\n");
482 if (sei_area->rs != 7)
485 ret = scm_process_availability_information();
487 CIO_CRW_EVENT(0, "chsc: process availability information"
488 " failed (rc=%d).\n", ret);
491 static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
493 switch (sei_area->cc) {
495 zpci_event_error(sei_area->ccdf);
498 zpci_event_availability(sei_area->ccdf);
501 CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n",
507 static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
509 /* which kind of information was stored? */
510 switch (sei_area->cc) {
511 case 1: /* link incident*/
512 chsc_process_sei_link_incident(sei_area);
514 case 2: /* i/o resource accessibility */
515 chsc_process_sei_res_acc(sei_area);
517 case 7: /* channel-path-availability information */
518 chsc_process_sei_chp_avail(sei_area);
520 case 8: /* channel-path-configuration notification */
521 chsc_process_sei_chp_config(sei_area);
523 case 12: /* scm change notification */
524 chsc_process_sei_scm_change(sei_area);
526 case 14: /* scm available notification */
527 chsc_process_sei_scm_avail(sei_area);
529 default: /* other stuff */
530 CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
535 /* Check if we might have lost some information. */
536 if (sei_area->flags & 0x40) {
537 CIO_CRW_EVENT(2, "chsc: event overflow\n");
538 css_schedule_eval_all();
542 static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
544 static int ntsm_unsupported;
547 memset(sei, 0, sizeof(*sei));
548 sei->request.length = 0x0010;
549 sei->request.code = 0x000e;
550 if (!ntsm_unsupported)
556 if (sei->response.code != 0x0001) {
557 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n",
558 sei->response.code, sei->ntsm);
560 if (sei->response.code == 3 && sei->ntsm) {
561 /* Fallback for old firmware. */
562 ntsm_unsupported = 1;
568 CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
571 chsc_process_sei_nt0(&sei->u.nt0_area);
574 chsc_process_sei_nt2(&sei->u.nt2_area);
577 CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
581 if (!(sei->u.nt0_area.flags & 0x80))
587 * Handle channel subsystem related CRWs.
588 * Use store event information to find out what's going on.
590 * Note: Access to sei_page is serialized through machine check handler
591 * thread, so no need for locking.
593 static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
595 struct chsc_sei *sei = sei_page;
598 css_schedule_eval_all();
601 CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
602 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
603 crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
604 crw0->erc, crw0->rsid);
606 CIO_TRACE_EVENT(2, "prcss");
607 chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
610 void chsc_chp_online(struct chp_id chpid)
613 struct chp_link link;
615 sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
616 CIO_TRACE_EVENT(2, dbf_txt);
618 if (chp_get_status(chpid) != 0) {
619 memset(&link, 0, sizeof(struct chp_link));
621 /* Wait until previous actions have settled. */
622 css_wait_for_slow_path();
623 for_each_subchannel_staged(__s390_process_res_acc, NULL,
625 css_schedule_reprobe();
629 static void __s390_subchannel_vary_chpid(struct subchannel *sch,
630 struct chp_id chpid, int on)
633 struct chp_link link;
635 memset(&link, 0, sizeof(struct chp_link));
637 spin_lock_irqsave(sch->lock, flags);
638 if (sch->driver && sch->driver->chp_event)
639 sch->driver->chp_event(sch, &link,
640 on ? CHP_VARY_ON : CHP_VARY_OFF);
641 spin_unlock_irqrestore(sch->lock, flags);
644 static int s390_subchannel_vary_chpid_off(struct subchannel *sch, void *data)
646 struct chp_id *chpid = data;
648 __s390_subchannel_vary_chpid(sch, *chpid, 0);
652 static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
654 struct chp_id *chpid = data;
656 __s390_subchannel_vary_chpid(sch, *chpid, 1);
661 * chsc_chp_vary - propagate channel-path vary operation to subchannels
662 * @chpid: channl-path ID
663 * @on: non-zero for vary online, zero for vary offline
665 int chsc_chp_vary(struct chp_id chpid, int on)
667 struct channel_path *chp = chpid_to_chp(chpid);
669 /* Wait until previous actions have settled. */
670 css_wait_for_slow_path();
672 * Redo PathVerification on the devices the chpid connects to
675 /* Try to update the channel path description. */
676 chp_update_desc(chp);
677 for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
679 css_schedule_reprobe();
681 for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
688 chsc_remove_cmg_attr(struct channel_subsystem *css)
692 for (i = 0; i <= __MAX_CHPID; i++) {
695 chp_remove_cmg_attr(css->chps[i]);
700 chsc_add_cmg_attr(struct channel_subsystem *css)
705 for (i = 0; i <= __MAX_CHPID; i++) {
708 ret = chp_add_cmg_attr(css->chps[i]);
714 for (--i; i >= 0; i--) {
717 chp_remove_cmg_attr(css->chps[i]);
722 int __chsc_do_secm(struct channel_subsystem *css, int enable)
725 struct chsc_header request;
726 u32 operation_code : 2;
735 struct chsc_header response;
740 } __attribute__ ((packed)) *secm_area;
743 spin_lock_irq(&chsc_page_lock);
744 memset(chsc_page, 0, PAGE_SIZE);
745 secm_area = chsc_page;
746 secm_area->request.length = 0x0050;
747 secm_area->request.code = 0x0016;
749 secm_area->key = PAGE_DEFAULT_KEY >> 4;
750 secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
751 secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
753 secm_area->operation_code = enable ? 0 : 1;
755 ccode = chsc(secm_area);
757 ret = (ccode == 3) ? -ENODEV : -EBUSY;
761 switch (secm_area->response.code) {
767 ret = chsc_error_from_response(secm_area->response.code);
770 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
771 secm_area->response.code);
773 spin_unlock_irq(&chsc_page_lock);
778 chsc_secm(struct channel_subsystem *css, int enable)
782 if (enable && !css->cm_enabled) {
783 css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
784 css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
785 if (!css->cub_addr1 || !css->cub_addr2) {
786 free_page((unsigned long)css->cub_addr1);
787 free_page((unsigned long)css->cub_addr2);
791 ret = __chsc_do_secm(css, enable);
793 css->cm_enabled = enable;
794 if (css->cm_enabled) {
795 ret = chsc_add_cmg_attr(css);
797 __chsc_do_secm(css, 0);
801 chsc_remove_cmg_attr(css);
803 if (!css->cm_enabled) {
804 free_page((unsigned long)css->cub_addr1);
805 free_page((unsigned long)css->cub_addr2);
810 int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
811 int c, int m, void *page)
813 struct chsc_scpd *scpd_area;
816 if ((rfmt == 1) && !css_general_characteristics.fcs)
818 if ((rfmt == 2) && !css_general_characteristics.cib)
821 memset(page, 0, PAGE_SIZE);
823 scpd_area->request.length = 0x0010;
824 scpd_area->request.code = 0x0002;
825 scpd_area->cssid = chpid.cssid;
826 scpd_area->first_chpid = chpid.id;
827 scpd_area->last_chpid = chpid.id;
830 scpd_area->fmt = fmt;
831 scpd_area->rfmt = rfmt;
833 ccode = chsc(scpd_area);
835 return (ccode == 3) ? -ENODEV : -EBUSY;
837 ret = chsc_error_from_response(scpd_area->response.code);
839 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
840 scpd_area->response.code);
843 EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
845 int chsc_determine_base_channel_path_desc(struct chp_id chpid,
846 struct channel_path_desc *desc)
848 struct chsc_response_struct *chsc_resp;
849 struct chsc_scpd *scpd_area;
853 spin_lock_irqsave(&chsc_page_lock, flags);
854 scpd_area = chsc_page;
855 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 0, 0, scpd_area);
858 chsc_resp = (void *)&scpd_area->response;
859 memcpy(desc, &chsc_resp->data, sizeof(*desc));
861 spin_unlock_irqrestore(&chsc_page_lock, flags);
865 int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
866 struct channel_path_desc_fmt1 *desc)
868 struct chsc_response_struct *chsc_resp;
869 struct chsc_scpd *scpd_area;
873 spin_lock_irqsave(&chsc_page_lock, flags);
874 scpd_area = chsc_page;
875 ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area);
878 chsc_resp = (void *)&scpd_area->response;
879 memcpy(desc, &chsc_resp->data, sizeof(*desc));
881 spin_unlock_irqrestore(&chsc_page_lock, flags);
886 chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
887 struct cmg_chars *chars)
889 struct cmg_chars *cmg_chars;
892 cmg_chars = chp->cmg_chars;
893 for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
894 mask = 0x80 >> (i + 3);
896 cmg_chars->values[i] = chars->values[i];
898 cmg_chars->values[i] = 0;
902 int chsc_get_channel_measurement_chars(struct channel_path *chp)
904 struct cmg_chars *cmg_chars;
908 struct chsc_header request;
914 struct chsc_header response;
925 u32 data[NR_MEASUREMENT_CHARS];
926 } __attribute__ ((packed)) *scmc_area;
928 chp->cmg_chars = NULL;
929 cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL);
933 spin_lock_irq(&chsc_page_lock);
934 memset(chsc_page, 0, PAGE_SIZE);
935 scmc_area = chsc_page;
936 scmc_area->request.length = 0x0010;
937 scmc_area->request.code = 0x0022;
938 scmc_area->first_chpid = chp->chpid.id;
939 scmc_area->last_chpid = chp->chpid.id;
941 ccode = chsc(scmc_area);
943 ret = (ccode == 3) ? -ENODEV : -EBUSY;
947 ret = chsc_error_from_response(scmc_area->response.code);
949 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
950 scmc_area->response.code);
953 if (scmc_area->not_valid) {
958 chp->cmg = scmc_area->cmg;
959 chp->shared = scmc_area->shared;
960 if (chp->cmg != 2 && chp->cmg != 3) {
961 /* No cmg-dependent data. */
964 chp->cmg_chars = cmg_chars;
965 chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
966 (struct cmg_chars *) &scmc_area->data);
968 spin_unlock_irq(&chsc_page_lock);
975 int __init chsc_init(void)
979 sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
980 chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
981 if (!sei_page || !chsc_page) {
985 ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
990 free_page((unsigned long)chsc_page);
991 free_page((unsigned long)sei_page);
995 void __init chsc_init_cleanup(void)
997 crw_unregister_handler(CRW_RSC_CSS);
998 free_page((unsigned long)chsc_page);
999 free_page((unsigned long)sei_page);
1002 int chsc_enable_facility(int operation_code)
1004 unsigned long flags;
1007 struct chsc_header request;
1014 u32 operation_data_area[252];
1015 struct chsc_header response;
1019 } __attribute__ ((packed)) *sda_area;
1021 spin_lock_irqsave(&chsc_page_lock, flags);
1022 memset(chsc_page, 0, PAGE_SIZE);
1023 sda_area = chsc_page;
1024 sda_area->request.length = 0x0400;
1025 sda_area->request.code = 0x0031;
1026 sda_area->operation_code = operation_code;
1028 ret = chsc(sda_area);
1030 ret = (ret == 3) ? -ENODEV : -EBUSY;
1034 switch (sda_area->response.code) {
1039 ret = chsc_error_from_response(sda_area->response.code);
1042 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
1043 operation_code, sda_area->response.code);
1045 spin_unlock_irqrestore(&chsc_page_lock, flags);
1049 struct css_general_char css_general_characteristics;
1050 struct css_chsc_char css_chsc_characteristics;
1053 chsc_determine_css_characteristics(void)
1057 struct chsc_header request;
1061 struct chsc_header response;
1063 u32 general_char[510];
1065 } __attribute__ ((packed)) *scsc_area;
1067 spin_lock_irq(&chsc_page_lock);
1068 memset(chsc_page, 0, PAGE_SIZE);
1069 scsc_area = chsc_page;
1070 scsc_area->request.length = 0x0010;
1071 scsc_area->request.code = 0x0010;
1073 result = chsc(scsc_area);
1075 result = (result == 3) ? -ENODEV : -EBUSY;
1079 result = chsc_error_from_response(scsc_area->response.code);
1081 memcpy(&css_general_characteristics, scsc_area->general_char,
1082 sizeof(css_general_characteristics));
1083 memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
1084 sizeof(css_chsc_characteristics));
1086 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
1087 scsc_area->response.code);
1089 spin_unlock_irq(&chsc_page_lock);
1093 EXPORT_SYMBOL_GPL(css_general_characteristics);
1094 EXPORT_SYMBOL_GPL(css_chsc_characteristics);
1096 int chsc_sstpc(void *page, unsigned int op, u16 ctrl)
1099 struct chsc_header request;
1101 unsigned int op : 8;
1102 unsigned int rsvd1 : 8;
1103 unsigned int ctrl : 16;
1104 unsigned int rsvd2[5];
1105 struct chsc_header response;
1106 unsigned int rsvd3[7];
1107 } __attribute__ ((packed)) *rr;
1110 memset(page, 0, PAGE_SIZE);
1112 rr->request.length = 0x0020;
1113 rr->request.code = 0x0033;
1119 rc = (rr->response.code == 0x0001) ? 0 : -EIO;
1123 int chsc_sstpi(void *page, void *result, size_t size)
1126 struct chsc_header request;
1127 unsigned int rsvd0[3];
1128 struct chsc_header response;
1130 } __attribute__ ((packed)) *rr;
1133 memset(page, 0, PAGE_SIZE);
1135 rr->request.length = 0x0010;
1136 rr->request.code = 0x0038;
1140 memcpy(result, &rr->data, size);
1141 return (rr->response.code == 0x0001) ? 0 : -EIO;
1144 int chsc_siosl(struct subchannel_id schid)
1147 struct chsc_header request;
1149 struct subchannel_id sid;
1151 struct chsc_header response;
1153 } __attribute__ ((packed)) *siosl_area;
1154 unsigned long flags;
1158 spin_lock_irqsave(&chsc_page_lock, flags);
1159 memset(chsc_page, 0, PAGE_SIZE);
1160 siosl_area = chsc_page;
1161 siosl_area->request.length = 0x0010;
1162 siosl_area->request.code = 0x0046;
1163 siosl_area->word1 = 0x80000000;
1164 siosl_area->sid = schid;
1166 ccode = chsc(siosl_area);
1172 CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
1173 schid.ssid, schid.sch_no, ccode);
1176 rc = chsc_error_from_response(siosl_area->response.code);
1178 CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
1179 schid.ssid, schid.sch_no,
1180 siosl_area->response.code);
1182 CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
1183 schid.ssid, schid.sch_no);
1185 spin_unlock_irqrestore(&chsc_page_lock, flags);
1188 EXPORT_SYMBOL_GPL(chsc_siosl);
1191 * chsc_scm_info() - store SCM information (SSI)
1192 * @scm_area: request and response block for SSI
1193 * @token: continuation token
1195 * Returns 0 on success.
1197 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
1201 memset(scm_area, 0, sizeof(*scm_area));
1202 scm_area->request.length = 0x0020;
1203 scm_area->request.code = 0x004C;
1204 scm_area->reqtok = token;
1206 ccode = chsc(scm_area);
1208 ret = (ccode == 3) ? -ENODEV : -EBUSY;
1211 ret = chsc_error_from_response(scm_area->response.code);
1213 CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",
1214 scm_area->response.code);
1218 EXPORT_SYMBOL_GPL(chsc_scm_info);
1221 * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info.
1222 * @schid: id of the subchannel on which PNSO is performed
1223 * @brinfo_area: request and response block for the operation
1224 * @resume_token: resume token for multiblock response
1225 * @cnc: Boolean change-notification control
1227 * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
1229 * Returns 0 on success.
1231 int chsc_pnso_brinfo(struct subchannel_id schid,
1232 struct chsc_pnso_area *brinfo_area,
1233 struct chsc_brinfo_resume_token resume_token,
1236 memset(brinfo_area, 0, sizeof(*brinfo_area));
1237 brinfo_area->request.length = 0x0030;
1238 brinfo_area->request.code = 0x003d; /* network-subchannel operation */
1239 brinfo_area->m = schid.m;
1240 brinfo_area->ssid = schid.ssid;
1241 brinfo_area->sch = schid.sch_no;
1242 brinfo_area->cssid = schid.cssid;
1243 brinfo_area->oc = 0; /* Store-network-bridging-information list */
1244 brinfo_area->resume_token = resume_token;
1245 brinfo_area->n = (cnc != 0);
1246 if (chsc(brinfo_area))
1248 return chsc_error_from_response(brinfo_area->response.code);
1250 EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);