2 * drivers/s390/cio/chsc.c
3 * S/390 common I/O routines -- channel subsystem call
5 * Copyright IBM Corp. 1999,2010
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>
20 #include <asm/chpid.h>
26 #include "cio_debug.h"
31 static void *sei_page
;
32 static void *chsc_page
;
33 static DEFINE_SPINLOCK(chsc_page_lock
);
36 * chsc_error_from_response() - convert a chsc response to an error
37 * @response: chsc response code
39 * Returns an appropriate Linux error code for @response.
41 int chsc_error_from_response(int response
)
60 EXPORT_SYMBOL_GPL(chsc_error_from_response
);
62 struct chsc_ssd_area
{
63 struct chsc_header request
;
67 u16 f_sch
; /* first subchannel */
69 u16 l_sch
; /* last subchannel */
71 struct chsc_header response
;
75 u8 st
: 3; /* subchannel type */
77 u8 unit_addr
; /* unit address */
78 u16 devno
; /* device number */
81 u16 sch
; /* subchannel */
82 u8 chpid
[8]; /* chpids 0-7 */
83 u16 fla
[8]; /* full link addresses 0-7 */
84 } __attribute__ ((packed
));
86 int chsc_get_ssd_info(struct subchannel_id schid
, struct chsc_ssd_info
*ssd
)
88 struct chsc_ssd_area
*ssd_area
;
94 spin_lock_irq(&chsc_page_lock
);
95 memset(chsc_page
, 0, PAGE_SIZE
);
97 ssd_area
->request
.length
= 0x0010;
98 ssd_area
->request
.code
= 0x0004;
99 ssd_area
->ssid
= schid
.ssid
;
100 ssd_area
->f_sch
= schid
.sch_no
;
101 ssd_area
->l_sch
= schid
.sch_no
;
103 ccode
= chsc(ssd_area
);
104 /* Check response. */
106 ret
= (ccode
== 3) ? -ENODEV
: -EBUSY
;
109 ret
= chsc_error_from_response(ssd_area
->response
.code
);
111 CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
112 schid
.ssid
, schid
.sch_no
,
113 ssd_area
->response
.code
);
116 if (!ssd_area
->sch_valid
) {
122 memset(ssd
, 0, sizeof(struct chsc_ssd_info
));
123 if ((ssd_area
->st
!= SUBCHANNEL_TYPE_IO
) &&
124 (ssd_area
->st
!= SUBCHANNEL_TYPE_MSG
))
126 ssd
->path_mask
= ssd_area
->path_mask
;
127 ssd
->fla_valid_mask
= ssd_area
->fla_valid_mask
;
128 for (i
= 0; i
< 8; i
++) {
130 if (ssd_area
->path_mask
& mask
) {
131 chp_id_init(&ssd
->chpid
[i
]);
132 ssd
->chpid
[i
].id
= ssd_area
->chpid
[i
];
134 if (ssd_area
->fla_valid_mask
& mask
)
135 ssd
->fla
[i
] = ssd_area
->fla
[i
];
138 spin_unlock_irq(&chsc_page_lock
);
142 static int s390_subchannel_remove_chpid(struct subchannel
*sch
, void *data
)
144 spin_lock_irq(sch
->lock
);
145 if (sch
->driver
&& sch
->driver
->chp_event
)
146 if (sch
->driver
->chp_event(sch
, data
, CHP_OFFLINE
) != 0)
148 spin_unlock_irq(sch
->lock
);
153 spin_unlock_irq(sch
->lock
);
154 css_schedule_eval(sch
->schid
);
158 void chsc_chp_offline(struct chp_id chpid
)
161 struct chp_link link
;
163 sprintf(dbf_txt
, "chpr%x.%02x", chpid
.cssid
, chpid
.id
);
164 CIO_TRACE_EVENT(2, dbf_txt
);
166 if (chp_get_status(chpid
) <= 0)
168 memset(&link
, 0, sizeof(struct chp_link
));
170 /* Wait until previous actions have settled. */
171 css_wait_for_slow_path();
172 for_each_subchannel_staged(s390_subchannel_remove_chpid
, NULL
, &link
);
175 static int s390_process_res_acc_new_sch(struct subchannel_id schid
, void *data
)
179 * We don't know the device yet, but since a path
180 * may be available now to the device we'll have
181 * to do recognition again.
182 * Since we don't have any idea about which chpid
183 * that beast may be on we'll have to do a stsch
184 * on all devices, grr...
186 if (stsch_err(schid
, &schib
))
190 /* Put it on the slow path. */
191 css_schedule_eval(schid
);
195 static int __s390_process_res_acc(struct subchannel
*sch
, void *data
)
197 spin_lock_irq(sch
->lock
);
198 if (sch
->driver
&& sch
->driver
->chp_event
)
199 sch
->driver
->chp_event(sch
, data
, CHP_ONLINE
);
200 spin_unlock_irq(sch
->lock
);
205 static void s390_process_res_acc(struct chp_link
*link
)
209 sprintf(dbf_txt
, "accpr%x.%02x", link
->chpid
.cssid
,
211 CIO_TRACE_EVENT( 2, dbf_txt
);
212 if (link
->fla
!= 0) {
213 sprintf(dbf_txt
, "fla%x", link
->fla
);
214 CIO_TRACE_EVENT( 2, dbf_txt
);
216 /* Wait until previous actions have settled. */
217 css_wait_for_slow_path();
219 * I/O resources may have become accessible.
220 * Scan through all subchannels that may be concerned and
221 * do a validation on those.
222 * The more information we have (info), the less scanning
223 * will we have to do.
225 for_each_subchannel_staged(__s390_process_res_acc
,
226 s390_process_res_acc_new_sch
, link
);
230 __get_chpid_from_lir(void *data
)
236 /* incident-node descriptor */
238 /* attached-node descriptor */
240 /* incident-specific information */
242 } __attribute__ ((packed
)) *lir
;
246 /* NULL link incident record */
248 if (!(lir
->indesc
[0]&0xc0000000))
249 /* node descriptor not valid */
251 if (!(lir
->indesc
[0]&0x10000000))
252 /* don't handle device-type nodes - FIXME */
254 /* Byte 3 contains the chpid. Could also be CTCA, but we don't care */
256 return (u16
) (lir
->indesc
[0]&0x000000ff);
259 struct chsc_sei_area
{
260 struct chsc_header request
;
264 struct chsc_header response
;
267 u8 vf
; /* validity flags */
268 u8 rs
; /* reporting source */
269 u8 cc
; /* content code */
270 u16 fla
; /* full link address */
271 u16 rsid
; /* reporting source id */
274 u8 ccdf
[4096 - 16 - 24]; /* content-code dependent field */
275 /* ccdf has to be big enough for a link-incident record */
276 } __attribute__ ((packed
));
278 static void chsc_process_sei_link_incident(struct chsc_sei_area
*sei_area
)
283 CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
284 sei_area
->rs
, sei_area
->rsid
);
285 if (sei_area
->rs
!= 4)
287 id
= __get_chpid_from_lir(sei_area
->ccdf
);
289 CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
293 chsc_chp_offline(chpid
);
297 static void chsc_process_sei_res_acc(struct chsc_sei_area
*sei_area
)
299 struct chp_link link
;
303 CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
304 "rs_id=%04x)\n", sei_area
->rs
, sei_area
->rsid
);
305 if (sei_area
->rs
!= 4)
308 chpid
.id
= sei_area
->rsid
;
309 /* allocate a new channel path structure, if needed */
310 status
= chp_get_status(chpid
);
315 memset(&link
, 0, sizeof(struct chp_link
));
317 if ((sei_area
->vf
& 0xc0) != 0) {
318 link
.fla
= sei_area
->fla
;
319 if ((sei_area
->vf
& 0xc0) == 0xc0)
320 /* full link address */
321 link
.fla_mask
= 0xffff;
324 link
.fla_mask
= 0xff00;
326 s390_process_res_acc(&link
);
329 struct chp_config_data
{
335 static void chsc_process_sei_chp_config(struct chsc_sei_area
*sei_area
)
337 struct chp_config_data
*data
;
340 char *events
[3] = {"configure", "deconfigure", "cancel deconfigure"};
342 CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
343 if (sei_area
->rs
!= 0)
345 data
= (struct chp_config_data
*) &(sei_area
->ccdf
);
347 for (num
= 0; num
<= __MAX_CHPID
; num
++) {
348 if (!chp_test_bit(data
->map
, num
))
351 pr_notice("Processing %s for channel path %x.%02x\n",
352 events
[data
->op
], chpid
.cssid
, chpid
.id
);
355 chp_cfg_schedule(chpid
, 1);
358 chp_cfg_schedule(chpid
, 0);
361 chp_cfg_cancel_deconfigure(chpid
);
367 static void chsc_process_sei(struct chsc_sei_area
*sei_area
)
369 /* Check if we might have lost some information. */
370 if (sei_area
->flags
& 0x40) {
371 CIO_CRW_EVENT(2, "chsc: event overflow\n");
372 css_schedule_eval_all();
374 /* which kind of information was stored? */
375 switch (sei_area
->cc
) {
376 case 1: /* link incident*/
377 chsc_process_sei_link_incident(sei_area
);
379 case 2: /* i/o resource accessibiliy */
380 chsc_process_sei_res_acc(sei_area
);
382 case 8: /* channel-path-configuration notification */
383 chsc_process_sei_chp_config(sei_area
);
385 default: /* other stuff */
386 CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
392 static void chsc_process_crw(struct crw
*crw0
, struct crw
*crw1
, int overflow
)
394 struct chsc_sei_area
*sei_area
;
397 css_schedule_eval_all();
400 CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
401 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
402 crw0
->slct
, crw0
->oflw
, crw0
->chn
, crw0
->rsc
, crw0
->anc
,
403 crw0
->erc
, crw0
->rsid
);
406 /* Access to sei_page is serialized through machine check handler
407 * thread, so no need for locking. */
410 CIO_TRACE_EVENT(2, "prcss");
412 memset(sei_area
, 0, sizeof(*sei_area
));
413 sei_area
->request
.length
= 0x0010;
414 sei_area
->request
.code
= 0x000e;
418 if (sei_area
->response
.code
== 0x0001) {
419 CIO_CRW_EVENT(4, "chsc: sei successful\n");
420 chsc_process_sei(sei_area
);
422 CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
423 sei_area
->response
.code
);
426 } while (sei_area
->flags
& 0x80);
429 void chsc_chp_online(struct chp_id chpid
)
432 struct chp_link link
;
434 sprintf(dbf_txt
, "cadd%x.%02x", chpid
.cssid
, chpid
.id
);
435 CIO_TRACE_EVENT(2, dbf_txt
);
437 if (chp_get_status(chpid
) != 0) {
438 memset(&link
, 0, sizeof(struct chp_link
));
440 /* Wait until previous actions have settled. */
441 css_wait_for_slow_path();
442 for_each_subchannel_staged(__s390_process_res_acc
, NULL
,
447 static void __s390_subchannel_vary_chpid(struct subchannel
*sch
,
448 struct chp_id chpid
, int on
)
451 struct chp_link link
;
453 memset(&link
, 0, sizeof(struct chp_link
));
455 spin_lock_irqsave(sch
->lock
, flags
);
456 if (sch
->driver
&& sch
->driver
->chp_event
)
457 sch
->driver
->chp_event(sch
, &link
,
458 on
? CHP_VARY_ON
: CHP_VARY_OFF
);
459 spin_unlock_irqrestore(sch
->lock
, flags
);
462 static int s390_subchannel_vary_chpid_off(struct subchannel
*sch
, void *data
)
464 struct chp_id
*chpid
= data
;
466 __s390_subchannel_vary_chpid(sch
, *chpid
, 0);
470 static int s390_subchannel_vary_chpid_on(struct subchannel
*sch
, void *data
)
472 struct chp_id
*chpid
= data
;
474 __s390_subchannel_vary_chpid(sch
, *chpid
, 1);
479 __s390_vary_chpid_on(struct subchannel_id schid
, void *data
)
483 if (stsch_err(schid
, &schib
))
486 /* Put it on the slow path. */
487 css_schedule_eval(schid
);
492 * chsc_chp_vary - propagate channel-path vary operation to subchannels
493 * @chpid: channl-path ID
494 * @on: non-zero for vary online, zero for vary offline
496 int chsc_chp_vary(struct chp_id chpid
, int on
)
498 struct chp_link link
;
500 memset(&link
, 0, sizeof(struct chp_link
));
502 /* Wait until previous actions have settled. */
503 css_wait_for_slow_path();
505 * Redo PathVerification on the devices the chpid connects to
509 for_each_subchannel_staged(s390_subchannel_vary_chpid_on
,
510 __s390_vary_chpid_on
, &link
);
512 for_each_subchannel_staged(s390_subchannel_vary_chpid_off
,
519 chsc_remove_cmg_attr(struct channel_subsystem
*css
)
523 for (i
= 0; i
<= __MAX_CHPID
; i
++) {
526 chp_remove_cmg_attr(css
->chps
[i
]);
531 chsc_add_cmg_attr(struct channel_subsystem
*css
)
536 for (i
= 0; i
<= __MAX_CHPID
; i
++) {
539 ret
= chp_add_cmg_attr(css
->chps
[i
]);
545 for (--i
; i
>= 0; i
--) {
548 chp_remove_cmg_attr(css
->chps
[i
]);
553 int __chsc_do_secm(struct channel_subsystem
*css
, int enable
)
556 struct chsc_header request
;
557 u32 operation_code
: 2;
566 struct chsc_header response
;
571 } __attribute__ ((packed
)) *secm_area
;
574 spin_lock_irq(&chsc_page_lock
);
575 memset(chsc_page
, 0, PAGE_SIZE
);
576 secm_area
= chsc_page
;
577 secm_area
->request
.length
= 0x0050;
578 secm_area
->request
.code
= 0x0016;
580 secm_area
->key
= PAGE_DEFAULT_KEY
>> 4;
581 secm_area
->cub_addr1
= (u64
)(unsigned long)css
->cub_addr1
;
582 secm_area
->cub_addr2
= (u64
)(unsigned long)css
->cub_addr2
;
584 secm_area
->operation_code
= enable
? 0 : 1;
586 ccode
= chsc(secm_area
);
588 ret
= (ccode
== 3) ? -ENODEV
: -EBUSY
;
592 switch (secm_area
->response
.code
) {
598 ret
= chsc_error_from_response(secm_area
->response
.code
);
601 CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
602 secm_area
->response
.code
);
604 spin_unlock_irq(&chsc_page_lock
);
609 chsc_secm(struct channel_subsystem
*css
, int enable
)
613 if (enable
&& !css
->cm_enabled
) {
614 css
->cub_addr1
= (void *)get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
615 css
->cub_addr2
= (void *)get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
616 if (!css
->cub_addr1
|| !css
->cub_addr2
) {
617 free_page((unsigned long)css
->cub_addr1
);
618 free_page((unsigned long)css
->cub_addr2
);
622 ret
= __chsc_do_secm(css
, enable
);
624 css
->cm_enabled
= enable
;
625 if (css
->cm_enabled
) {
626 ret
= chsc_add_cmg_attr(css
);
628 __chsc_do_secm(css
, 0);
632 chsc_remove_cmg_attr(css
);
634 if (!css
->cm_enabled
) {
635 free_page((unsigned long)css
->cub_addr1
);
636 free_page((unsigned long)css
->cub_addr2
);
641 int chsc_determine_channel_path_desc(struct chp_id chpid
, int fmt
, int rfmt
,
643 struct chsc_response_struct
*resp
)
648 struct chsc_header request
;
660 struct chsc_header response
;
661 u8 data
[PAGE_SIZE
- 20];
662 } __attribute__ ((packed
)) *scpd_area
;
664 if ((rfmt
== 1) && !css_general_characteristics
.fcs
)
666 if ((rfmt
== 2) && !css_general_characteristics
.cib
)
669 spin_lock_irq(&chsc_page_lock
);
670 memset(chsc_page
, 0, PAGE_SIZE
);
671 scpd_area
= chsc_page
;
672 scpd_area
->request
.length
= 0x0010;
673 scpd_area
->request
.code
= 0x0002;
674 scpd_area
->cssid
= chpid
.cssid
;
675 scpd_area
->first_chpid
= chpid
.id
;
676 scpd_area
->last_chpid
= chpid
.id
;
679 scpd_area
->fmt
= fmt
;
680 scpd_area
->rfmt
= rfmt
;
682 ccode
= chsc(scpd_area
);
684 ret
= (ccode
== 3) ? -ENODEV
: -EBUSY
;
688 ret
= chsc_error_from_response(scpd_area
->response
.code
);
691 memcpy(resp
, &scpd_area
->response
, scpd_area
->response
.length
);
693 CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
694 scpd_area
->response
.code
);
696 spin_unlock_irq(&chsc_page_lock
);
699 EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc
);
701 int chsc_determine_base_channel_path_desc(struct chp_id chpid
,
702 struct channel_path_desc
*desc
)
704 struct chsc_response_struct
*chsc_resp
;
707 chsc_resp
= kzalloc(sizeof(*chsc_resp
), GFP_KERNEL
);
710 ret
= chsc_determine_channel_path_desc(chpid
, 0, 0, 0, 0, chsc_resp
);
713 memcpy(desc
, &chsc_resp
->data
, sizeof(*desc
));
720 chsc_initialize_cmg_chars(struct channel_path
*chp
, u8 cmcv
,
721 struct cmg_chars
*chars
)
723 struct cmg_chars
*cmg_chars
;
726 cmg_chars
= chp
->cmg_chars
;
727 for (i
= 0; i
< NR_MEASUREMENT_CHARS
; i
++) {
728 mask
= 0x80 >> (i
+ 3);
730 cmg_chars
->values
[i
] = chars
->values
[i
];
732 cmg_chars
->values
[i
] = 0;
736 int chsc_get_channel_measurement_chars(struct channel_path
*chp
)
738 struct cmg_chars
*cmg_chars
;
742 struct chsc_header request
;
748 struct chsc_header response
;
759 u32 data
[NR_MEASUREMENT_CHARS
];
760 } __attribute__ ((packed
)) *scmc_area
;
762 chp
->cmg_chars
= NULL
;
763 cmg_chars
= kmalloc(sizeof(*cmg_chars
), GFP_KERNEL
);
767 spin_lock_irq(&chsc_page_lock
);
768 memset(chsc_page
, 0, PAGE_SIZE
);
769 scmc_area
= chsc_page
;
770 scmc_area
->request
.length
= 0x0010;
771 scmc_area
->request
.code
= 0x0022;
772 scmc_area
->first_chpid
= chp
->chpid
.id
;
773 scmc_area
->last_chpid
= chp
->chpid
.id
;
775 ccode
= chsc(scmc_area
);
777 ret
= (ccode
== 3) ? -ENODEV
: -EBUSY
;
781 ret
= chsc_error_from_response(scmc_area
->response
.code
);
783 CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
784 scmc_area
->response
.code
);
787 if (scmc_area
->not_valid
) {
792 chp
->cmg
= scmc_area
->cmg
;
793 chp
->shared
= scmc_area
->shared
;
794 if (chp
->cmg
!= 2 && chp
->cmg
!= 3) {
795 /* No cmg-dependent data. */
798 chp
->cmg_chars
= cmg_chars
;
799 chsc_initialize_cmg_chars(chp
, scmc_area
->cmcv
,
800 (struct cmg_chars
*) &scmc_area
->data
);
802 spin_unlock_irq(&chsc_page_lock
);
809 int __init
chsc_init(void)
813 sei_page
= (void *)get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
814 chsc_page
= (void *)get_zeroed_page(GFP_KERNEL
| GFP_DMA
);
815 if (!sei_page
|| !chsc_page
) {
819 ret
= crw_register_handler(CRW_RSC_CSS
, chsc_process_crw
);
824 free_page((unsigned long)chsc_page
);
825 free_page((unsigned long)sei_page
);
829 void __init
chsc_init_cleanup(void)
831 crw_unregister_handler(CRW_RSC_CSS
);
832 free_page((unsigned long)chsc_page
);
833 free_page((unsigned long)sei_page
);
836 int chsc_enable_facility(int operation_code
)
841 struct chsc_header request
;
848 u32 operation_data_area
[252];
849 struct chsc_header response
;
853 } __attribute__ ((packed
)) *sda_area
;
855 spin_lock_irqsave(&chsc_page_lock
, flags
);
856 memset(chsc_page
, 0, PAGE_SIZE
);
857 sda_area
= chsc_page
;
858 sda_area
->request
.length
= 0x0400;
859 sda_area
->request
.code
= 0x0031;
860 sda_area
->operation_code
= operation_code
;
862 ret
= chsc(sda_area
);
864 ret
= (ret
== 3) ? -ENODEV
: -EBUSY
;
868 switch (sda_area
->response
.code
) {
873 ret
= chsc_error_from_response(sda_area
->response
.code
);
876 CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
877 operation_code
, sda_area
->response
.code
);
879 spin_unlock_irqrestore(&chsc_page_lock
, flags
);
883 struct css_general_char css_general_characteristics
;
884 struct css_chsc_char css_chsc_characteristics
;
887 chsc_determine_css_characteristics(void)
891 struct chsc_header request
;
895 struct chsc_header response
;
897 u32 general_char
[510];
899 } __attribute__ ((packed
)) *scsc_area
;
901 spin_lock_irq(&chsc_page_lock
);
902 memset(chsc_page
, 0, PAGE_SIZE
);
903 scsc_area
= chsc_page
;
904 scsc_area
->request
.length
= 0x0010;
905 scsc_area
->request
.code
= 0x0010;
907 result
= chsc(scsc_area
);
909 result
= (result
== 3) ? -ENODEV
: -EBUSY
;
913 result
= chsc_error_from_response(scsc_area
->response
.code
);
915 memcpy(&css_general_characteristics
, scsc_area
->general_char
,
916 sizeof(css_general_characteristics
));
917 memcpy(&css_chsc_characteristics
, scsc_area
->chsc_char
,
918 sizeof(css_chsc_characteristics
));
920 CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
921 scsc_area
->response
.code
);
923 spin_unlock_irq(&chsc_page_lock
);
927 EXPORT_SYMBOL_GPL(css_general_characteristics
);
928 EXPORT_SYMBOL_GPL(css_chsc_characteristics
);
930 int chsc_sstpc(void *page
, unsigned int op
, u16 ctrl
)
933 struct chsc_header request
;
936 unsigned int rsvd1
: 8;
937 unsigned int ctrl
: 16;
938 unsigned int rsvd2
[5];
939 struct chsc_header response
;
940 unsigned int rsvd3
[7];
941 } __attribute__ ((packed
)) *rr
;
944 memset(page
, 0, PAGE_SIZE
);
946 rr
->request
.length
= 0x0020;
947 rr
->request
.code
= 0x0033;
953 rc
= (rr
->response
.code
== 0x0001) ? 0 : -EIO
;
957 int chsc_sstpi(void *page
, void *result
, size_t size
)
960 struct chsc_header request
;
961 unsigned int rsvd0
[3];
962 struct chsc_header response
;
964 } __attribute__ ((packed
)) *rr
;
967 memset(page
, 0, PAGE_SIZE
);
969 rr
->request
.length
= 0x0010;
970 rr
->request
.code
= 0x0038;
974 memcpy(result
, &rr
->data
, size
);
975 return (rr
->response
.code
== 0x0001) ? 0 : -EIO
;
978 int chsc_siosl(struct subchannel_id schid
)
981 struct chsc_header request
;
983 struct subchannel_id sid
;
985 struct chsc_header response
;
987 } __attribute__ ((packed
)) *siosl_area
;
992 spin_lock_irqsave(&chsc_page_lock
, flags
);
993 memset(chsc_page
, 0, PAGE_SIZE
);
994 siosl_area
= chsc_page
;
995 siosl_area
->request
.length
= 0x0010;
996 siosl_area
->request
.code
= 0x0046;
997 siosl_area
->word1
= 0x80000000;
998 siosl_area
->sid
= schid
;
1000 ccode
= chsc(siosl_area
);
1006 CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
1007 schid
.ssid
, schid
.sch_no
, ccode
);
1010 rc
= chsc_error_from_response(siosl_area
->response
.code
);
1012 CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
1013 schid
.ssid
, schid
.sch_no
,
1014 siosl_area
->response
.code
);
1016 CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
1017 schid
.ssid
, schid
.sch_no
);
1019 spin_unlock_irqrestore(&chsc_page_lock
, flags
);
1022 EXPORT_SYMBOL_GPL(chsc_siosl
);