2 * Channel subsystem base support.
4 * Copyright 2012 IBM Corp.
7 * This work is licensed under the terms of the GNU GPL, version 2 or (at
8 * your option) any later version. See the COPYING file in the top-level
13 #include "qemu/bitops.h"
14 #include "exec/address-spaces.h"
19 #include "hw/s390x/s390_flic.h"
21 typedef struct CrwContainer {
23 QTAILQ_ENTRY(CrwContainer) sibling;
26 typedef struct ChpInfo {
32 typedef struct SubchSet {
33 SubchDev *sch[MAX_SCHID + 1];
34 unsigned long schids_used[BITS_TO_LONGS(MAX_SCHID + 1)];
35 unsigned long devnos_used[BITS_TO_LONGS(MAX_SCHID + 1)];
38 typedef struct CssImage {
39 SubchSet *sch_set[MAX_SSID + 1];
40 ChpInfo chpids[MAX_CHPID + 1];
43 typedef struct IoAdapter {
47 QTAILQ_ENTRY(IoAdapter) sibling;
50 typedef struct ChannelSubSys {
51 QTAILQ_HEAD(, CrwContainer) pending_crws;
58 CssImage *css[MAX_CSSID + 1];
59 uint8_t default_cssid;
60 QTAILQ_HEAD(, IoAdapter) io_adapters;
63 static ChannelSubSys *channel_subsys;
65 int css_create_css_image(uint8_t cssid, bool default_image)
67 trace_css_new_image(cssid, default_image ? "(default)" : "");
68 if (cssid > MAX_CSSID) {
71 if (channel_subsys->css[cssid]) {
74 channel_subsys->css[cssid] = g_malloc0(sizeof(CssImage));
76 channel_subsys->default_cssid = cssid;
81 int css_register_io_adapter(uint8_t type, uint8_t isc, bool swap,
82 bool maskable, uint32_t *id)
87 S390FLICState *fs = s390_get_flic();
88 S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
91 QTAILQ_FOREACH(adapter, &channel_subsys->io_adapters, sibling) {
92 if ((adapter->type == type) && (adapter->isc == isc)) {
98 if (adapter->id >= *id) {
99 *id = adapter->id + 1;
105 adapter = g_new0(IoAdapter, 1);
106 ret = fsc->register_io_adapter(fs, *id, isc, swap, maskable);
110 adapter->type = type;
111 QTAILQ_INSERT_TAIL(&channel_subsys->io_adapters, adapter, sibling);
114 fprintf(stderr, "Unexpected error %d when registering adapter %d\n",
121 uint16_t css_build_subchannel_id(SubchDev *sch)
123 if (channel_subsys->max_cssid > 0) {
124 return (sch->cssid << 8) | (1 << 3) | (sch->ssid << 1) | 1;
126 return (sch->ssid << 1) | 1;
129 static void css_inject_io_interrupt(SubchDev *sch)
131 uint8_t isc = (sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ISC) >> 11;
133 trace_css_io_interrupt(sch->cssid, sch->ssid, sch->schid,
134 sch->curr_status.pmcw.intparm, isc, "");
135 s390_io_interrupt(css_build_subchannel_id(sch),
137 sch->curr_status.pmcw.intparm,
141 void css_conditional_io_interrupt(SubchDev *sch)
144 * If the subchannel is not currently status pending, make it pending
147 if (!(sch->curr_status.scsw.ctrl & SCSW_STCTL_STATUS_PEND)) {
148 uint8_t isc = (sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ISC) >> 11;
150 trace_css_io_interrupt(sch->cssid, sch->ssid, sch->schid,
151 sch->curr_status.pmcw.intparm, isc,
153 sch->curr_status.scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
154 sch->curr_status.scsw.ctrl |=
155 SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
156 /* Inject an I/O interrupt. */
157 s390_io_interrupt(css_build_subchannel_id(sch),
159 sch->curr_status.pmcw.intparm,
164 void css_adapter_interrupt(uint8_t isc)
166 uint32_t io_int_word = (isc << 27) | IO_INT_WORD_AI;
168 trace_css_adapter_interrupt(isc);
169 s390_io_interrupt(0, 0, 0, io_int_word);
172 static void sch_handle_clear_func(SubchDev *sch)
174 PMCW *p = &sch->curr_status.pmcw;
175 SCSW *s = &sch->curr_status.scsw;
178 /* Path management: In our simple css, we always choose the only path. */
181 /* Reset values prior to 'issuing the clear signal'. */
184 s->flags &= ~SCSW_FLAGS_MASK_PNO;
186 /* We always 'attempt to issue the clear signal', and we always succeed. */
187 sch->channel_prog = 0x0;
188 sch->last_cmd_valid = false;
189 s->ctrl &= ~SCSW_ACTL_CLEAR_PEND;
190 s->ctrl |= SCSW_STCTL_STATUS_PEND;
198 static void sch_handle_halt_func(SubchDev *sch)
201 PMCW *p = &sch->curr_status.pmcw;
202 SCSW *s = &sch->curr_status.scsw;
203 hwaddr curr_ccw = sch->channel_prog;
206 /* Path management: In our simple css, we always choose the only path. */
209 /* We always 'attempt to issue the halt signal', and we always succeed. */
210 sch->channel_prog = 0x0;
211 sch->last_cmd_valid = false;
212 s->ctrl &= ~SCSW_ACTL_HALT_PEND;
213 s->ctrl |= SCSW_STCTL_STATUS_PEND;
215 if ((s->ctrl & (SCSW_ACTL_SUBCH_ACTIVE | SCSW_ACTL_DEVICE_ACTIVE)) ||
216 !((s->ctrl & SCSW_ACTL_START_PEND) ||
217 (s->ctrl & SCSW_ACTL_SUSP))) {
218 s->dstat = SCSW_DSTAT_DEVICE_END;
220 if ((s->ctrl & (SCSW_ACTL_SUBCH_ACTIVE | SCSW_ACTL_DEVICE_ACTIVE)) ||
221 (s->ctrl & SCSW_ACTL_SUSP)) {
222 s->cpa = curr_ccw + 8;
229 static void copy_sense_id_to_guest(SenseId *dest, SenseId *src)
233 dest->reserved = src->reserved;
234 dest->cu_type = cpu_to_be16(src->cu_type);
235 dest->cu_model = src->cu_model;
236 dest->dev_type = cpu_to_be16(src->dev_type);
237 dest->dev_model = src->dev_model;
238 dest->unused = src->unused;
239 for (i = 0; i < ARRAY_SIZE(dest->ciw); i++) {
240 dest->ciw[i].type = src->ciw[i].type;
241 dest->ciw[i].command = src->ciw[i].command;
242 dest->ciw[i].count = cpu_to_be16(src->ciw[i].count);
246 static CCW1 copy_ccw_from_guest(hwaddr addr, bool fmt1)
253 cpu_physical_memory_read(addr, &tmp1, sizeof(tmp1));
254 ret.cmd_code = tmp1.cmd_code;
255 ret.flags = tmp1.flags;
256 ret.count = be16_to_cpu(tmp1.count);
257 ret.cda = be32_to_cpu(tmp1.cda);
259 cpu_physical_memory_read(addr, &tmp0, sizeof(tmp0));
260 ret.cmd_code = tmp0.cmd_code;
261 ret.flags = tmp0.flags;
262 ret.count = be16_to_cpu(tmp0.count);
263 ret.cda = be16_to_cpu(tmp0.cda1) | (tmp0.cda0 << 16);
264 if ((ret.cmd_code & 0x0f) == CCW_CMD_TIC) {
265 ret.cmd_code &= 0x0f;
271 static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_addr)
282 /* Translate everything to format-1 ccws - the information is the same. */
283 ccw = copy_ccw_from_guest(ccw_addr, sch->ccw_fmt_1);
285 /* Check for invalid command codes. */
286 if ((ccw.cmd_code & 0x0f) == 0) {
289 if (((ccw.cmd_code & 0x0f) == CCW_CMD_TIC) &&
290 ((ccw.cmd_code & 0xf0) != 0)) {
293 if (!sch->ccw_fmt_1 && (ccw.count == 0) &&
294 (ccw.cmd_code != CCW_CMD_TIC)) {
298 if (ccw.flags & CCW_FLAG_SUSPEND) {
302 check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
305 if (sch->ccw_no_data_cnt == 255) {
308 sch->ccw_no_data_cnt++;
311 /* Look at the command. */
312 switch (ccw.cmd_code) {
317 case CCW_CMD_BASIC_SENSE:
319 if (ccw.count != sizeof(sch->sense_data)) {
324 len = MIN(ccw.count, sizeof(sch->sense_data));
325 cpu_physical_memory_write(ccw.cda, sch->sense_data, len);
326 sch->curr_status.scsw.count = ccw.count - len;
327 memset(sch->sense_data, 0, sizeof(sch->sense_data));
330 case CCW_CMD_SENSE_ID:
334 copy_sense_id_to_guest(&sense_id, &sch->id);
335 /* Sense ID information is device specific. */
337 if (ccw.count != sizeof(sense_id)) {
342 len = MIN(ccw.count, sizeof(sense_id));
344 * Only indicate 0xff in the first sense byte if we actually
345 * have enough place to store at least bytes 0-3.
348 sense_id.reserved = 0xff;
350 sense_id.reserved = 0;
352 cpu_physical_memory_write(ccw.cda, &sense_id, len);
353 sch->curr_status.scsw.count = ccw.count - len;
358 if (sch->last_cmd_valid && (sch->last_cmd.cmd_code == CCW_CMD_TIC)) {
362 if (ccw.flags & (CCW_FLAG_CC | CCW_FLAG_DC)) {
366 sch->channel_prog = ccw.cda;
371 /* Handle device specific commands. */
372 ret = sch->ccw_cb(sch, ccw);
379 sch->last_cmd_valid = true;
381 if (ccw.flags & CCW_FLAG_CC) {
382 sch->channel_prog += 8;
390 static void sch_handle_start_func(SubchDev *sch, ORB *orb)
393 PMCW *p = &sch->curr_status.pmcw;
394 SCSW *s = &sch->curr_status.scsw;
398 /* Path management: In our simple css, we always choose the only path. */
401 if (!(s->ctrl & SCSW_ACTL_SUSP)) {
404 /* Look at the orb and try to execute the channel program. */
405 assert(orb != NULL); /* resume does not pass an orb */
406 p->intparm = orb->intparm;
407 if (!(orb->lpm & path)) {
408 /* Generate a deferred cc 3 condition. */
409 s->flags |= SCSW_FLAGS_MASK_CC;
410 s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
411 s->ctrl |= (SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND);
414 sch->ccw_fmt_1 = !!(orb->ctrl0 & ORB_CTRL0_MASK_FMT);
415 sch->ccw_no_data_cnt = 0;
417 s->ctrl &= ~(SCSW_ACTL_SUSP | SCSW_ACTL_RESUME_PEND);
419 sch->last_cmd_valid = false;
421 ret = css_interpret_ccw(sch, sch->channel_prog);
424 /* ccw chain, continue processing */
428 s->ctrl &= ~SCSW_ACTL_START_PEND;
429 s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
430 s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
431 SCSW_STCTL_STATUS_PEND;
432 s->dstat = SCSW_DSTAT_CHANNEL_END | SCSW_DSTAT_DEVICE_END;
433 s->cpa = sch->channel_prog + 8;
436 /* unsupported command, generate unit check (command reject) */
437 s->ctrl &= ~SCSW_ACTL_START_PEND;
438 s->dstat = SCSW_DSTAT_UNIT_CHECK;
439 /* Set sense bit 0 in ecw0. */
440 sch->sense_data[0] = 0x80;
441 s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
442 s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
443 SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
444 s->cpa = sch->channel_prog + 8;
447 /* memory problem, generate channel data check */
448 s->ctrl &= ~SCSW_ACTL_START_PEND;
449 s->cstat = SCSW_CSTAT_DATA_CHECK;
450 s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
451 s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
452 SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
453 s->cpa = sch->channel_prog + 8;
456 /* subchannel busy, generate deferred cc 1 */
457 s->flags &= ~SCSW_FLAGS_MASK_CC;
458 s->flags |= (1 << 8);
459 s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
460 s->ctrl |= SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
463 /* channel program has been suspended */
464 s->ctrl &= ~SCSW_ACTL_START_PEND;
465 s->ctrl |= SCSW_ACTL_SUSP;
468 /* error, generate channel program check */
469 s->ctrl &= ~SCSW_ACTL_START_PEND;
470 s->cstat = SCSW_CSTAT_PROG_CHECK;
471 s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
472 s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
473 SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
474 s->cpa = sch->channel_prog + 8;
477 } while (ret == -EAGAIN);
482 * On real machines, this would run asynchronously to the main vcpus.
483 * We might want to make some parts of the ssch handling (interpreting
484 * read/writes) asynchronous later on if we start supporting more than
485 * our current very simple devices.
487 static void do_subchannel_work(SubchDev *sch, ORB *orb)
490 SCSW *s = &sch->curr_status.scsw;
492 if (s->ctrl & SCSW_FCTL_CLEAR_FUNC) {
493 sch_handle_clear_func(sch);
494 } else if (s->ctrl & SCSW_FCTL_HALT_FUNC) {
495 sch_handle_halt_func(sch);
496 } else if (s->ctrl & SCSW_FCTL_START_FUNC) {
497 sch_handle_start_func(sch, orb);
502 css_inject_io_interrupt(sch);
505 static void copy_pmcw_to_guest(PMCW *dest, const PMCW *src)
509 dest->intparm = cpu_to_be32(src->intparm);
510 dest->flags = cpu_to_be16(src->flags);
511 dest->devno = cpu_to_be16(src->devno);
512 dest->lpm = src->lpm;
513 dest->pnom = src->pnom;
514 dest->lpum = src->lpum;
515 dest->pim = src->pim;
516 dest->mbi = cpu_to_be16(src->mbi);
517 dest->pom = src->pom;
518 dest->pam = src->pam;
519 for (i = 0; i < ARRAY_SIZE(dest->chpid); i++) {
520 dest->chpid[i] = src->chpid[i];
522 dest->chars = cpu_to_be32(src->chars);
525 static void copy_scsw_to_guest(SCSW *dest, const SCSW *src)
527 dest->flags = cpu_to_be16(src->flags);
528 dest->ctrl = cpu_to_be16(src->ctrl);
529 dest->cpa = cpu_to_be32(src->cpa);
530 dest->dstat = src->dstat;
531 dest->cstat = src->cstat;
532 dest->count = cpu_to_be16(src->count);
535 static void copy_schib_to_guest(SCHIB *dest, const SCHIB *src)
539 copy_pmcw_to_guest(&dest->pmcw, &src->pmcw);
540 copy_scsw_to_guest(&dest->scsw, &src->scsw);
541 dest->mba = cpu_to_be64(src->mba);
542 for (i = 0; i < ARRAY_SIZE(dest->mda); i++) {
543 dest->mda[i] = src->mda[i];
547 int css_do_stsch(SubchDev *sch, SCHIB *schib)
549 /* Use current status. */
550 copy_schib_to_guest(schib, &sch->curr_status);
554 static void copy_pmcw_from_guest(PMCW *dest, const PMCW *src)
558 dest->intparm = be32_to_cpu(src->intparm);
559 dest->flags = be16_to_cpu(src->flags);
560 dest->devno = be16_to_cpu(src->devno);
561 dest->lpm = src->lpm;
562 dest->pnom = src->pnom;
563 dest->lpum = src->lpum;
564 dest->pim = src->pim;
565 dest->mbi = be16_to_cpu(src->mbi);
566 dest->pom = src->pom;
567 dest->pam = src->pam;
568 for (i = 0; i < ARRAY_SIZE(dest->chpid); i++) {
569 dest->chpid[i] = src->chpid[i];
571 dest->chars = be32_to_cpu(src->chars);
574 static void copy_scsw_from_guest(SCSW *dest, const SCSW *src)
576 dest->flags = be16_to_cpu(src->flags);
577 dest->ctrl = be16_to_cpu(src->ctrl);
578 dest->cpa = be32_to_cpu(src->cpa);
579 dest->dstat = src->dstat;
580 dest->cstat = src->cstat;
581 dest->count = be16_to_cpu(src->count);
584 static void copy_schib_from_guest(SCHIB *dest, const SCHIB *src)
588 copy_pmcw_from_guest(&dest->pmcw, &src->pmcw);
589 copy_scsw_from_guest(&dest->scsw, &src->scsw);
590 dest->mba = be64_to_cpu(src->mba);
591 for (i = 0; i < ARRAY_SIZE(dest->mda); i++) {
592 dest->mda[i] = src->mda[i];
596 int css_do_msch(SubchDev *sch, const SCHIB *orig_schib)
598 SCSW *s = &sch->curr_status.scsw;
599 PMCW *p = &sch->curr_status.pmcw;
604 if (!(sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_DNV)) {
609 if (s->ctrl & SCSW_STCTL_STATUS_PEND) {
615 (SCSW_FCTL_START_FUNC|SCSW_FCTL_HALT_FUNC|SCSW_FCTL_CLEAR_FUNC)) {
620 copy_schib_from_guest(&schib, orig_schib);
621 /* Only update the program-modifiable fields. */
622 p->intparm = schib.pmcw.intparm;
624 p->flags &= ~(PMCW_FLAGS_MASK_ISC | PMCW_FLAGS_MASK_ENA |
625 PMCW_FLAGS_MASK_LM | PMCW_FLAGS_MASK_MME |
627 p->flags |= schib.pmcw.flags &
628 (PMCW_FLAGS_MASK_ISC | PMCW_FLAGS_MASK_ENA |
629 PMCW_FLAGS_MASK_LM | PMCW_FLAGS_MASK_MME |
631 p->lpm = schib.pmcw.lpm;
632 p->mbi = schib.pmcw.mbi;
633 p->pom = schib.pmcw.pom;
634 p->chars &= ~(PMCW_CHARS_MASK_MBFC | PMCW_CHARS_MASK_CSENSE);
635 p->chars |= schib.pmcw.chars &
636 (PMCW_CHARS_MASK_MBFC | PMCW_CHARS_MASK_CSENSE);
637 sch->curr_status.mba = schib.mba;
639 /* Has the channel been disabled? */
640 if (sch->disable_cb && (oldflags & PMCW_FLAGS_MASK_ENA) != 0
641 && (p->flags & PMCW_FLAGS_MASK_ENA) == 0) {
642 sch->disable_cb(sch);
651 int css_do_xsch(SubchDev *sch)
653 SCSW *s = &sch->curr_status.scsw;
654 PMCW *p = &sch->curr_status.pmcw;
657 if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
662 if (!(s->ctrl & SCSW_CTRL_MASK_FCTL) ||
663 ((s->ctrl & SCSW_CTRL_MASK_FCTL) != SCSW_FCTL_START_FUNC) ||
665 (SCSW_ACTL_RESUME_PEND | SCSW_ACTL_START_PEND | SCSW_ACTL_SUSP))) ||
666 (s->ctrl & SCSW_ACTL_SUBCH_ACTIVE)) {
671 if (s->ctrl & SCSW_CTRL_MASK_STCTL) {
676 /* Cancel the current operation. */
677 s->ctrl &= ~(SCSW_FCTL_START_FUNC |
678 SCSW_ACTL_RESUME_PEND |
679 SCSW_ACTL_START_PEND |
681 sch->channel_prog = 0x0;
682 sch->last_cmd_valid = false;
691 int css_do_csch(SubchDev *sch)
693 SCSW *s = &sch->curr_status.scsw;
694 PMCW *p = &sch->curr_status.pmcw;
697 if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
702 /* Trigger the clear function. */
703 s->ctrl &= ~(SCSW_CTRL_MASK_FCTL | SCSW_CTRL_MASK_ACTL);
704 s->ctrl |= SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_CLEAR_FUNC;
706 do_subchannel_work(sch, NULL);
713 int css_do_hsch(SubchDev *sch)
715 SCSW *s = &sch->curr_status.scsw;
716 PMCW *p = &sch->curr_status.pmcw;
719 if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
724 if (((s->ctrl & SCSW_CTRL_MASK_STCTL) == SCSW_STCTL_STATUS_PEND) ||
725 (s->ctrl & (SCSW_STCTL_PRIMARY |
726 SCSW_STCTL_SECONDARY |
727 SCSW_STCTL_ALERT))) {
732 if (s->ctrl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC)) {
737 /* Trigger the halt function. */
738 s->ctrl |= SCSW_FCTL_HALT_FUNC;
739 s->ctrl &= ~SCSW_FCTL_START_FUNC;
740 if (((s->ctrl & SCSW_CTRL_MASK_ACTL) ==
741 (SCSW_ACTL_SUBCH_ACTIVE | SCSW_ACTL_DEVICE_ACTIVE)) &&
742 ((s->ctrl & SCSW_CTRL_MASK_STCTL) == SCSW_STCTL_INTERMEDIATE)) {
743 s->ctrl &= ~SCSW_STCTL_STATUS_PEND;
745 s->ctrl |= SCSW_ACTL_HALT_PEND;
747 do_subchannel_work(sch, NULL);
754 static void css_update_chnmon(SubchDev *sch)
756 if (!(sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_MME)) {
760 /* The counter is conveniently located at the beginning of the struct. */
761 if (sch->curr_status.pmcw.chars & PMCW_CHARS_MASK_MBFC) {
762 /* Format 1, per-subchannel area. */
765 count = address_space_ldl(&address_space_memory,
766 sch->curr_status.mba,
767 MEMTXATTRS_UNSPECIFIED,
770 address_space_stl(&address_space_memory, sch->curr_status.mba, count,
771 MEMTXATTRS_UNSPECIFIED, NULL);
773 /* Format 0, global area. */
777 offset = sch->curr_status.pmcw.mbi << 5;
778 count = address_space_lduw(&address_space_memory,
779 channel_subsys->chnmon_area + offset,
780 MEMTXATTRS_UNSPECIFIED,
783 address_space_stw(&address_space_memory,
784 channel_subsys->chnmon_area + offset, count,
785 MEMTXATTRS_UNSPECIFIED, NULL);
789 int css_do_ssch(SubchDev *sch, ORB *orb)
791 SCSW *s = &sch->curr_status.scsw;
792 PMCW *p = &sch->curr_status.pmcw;
795 if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
800 if (s->ctrl & SCSW_STCTL_STATUS_PEND) {
805 if (s->ctrl & (SCSW_FCTL_START_FUNC |
806 SCSW_FCTL_HALT_FUNC |
807 SCSW_FCTL_CLEAR_FUNC)) {
812 /* If monitoring is active, update counter. */
813 if (channel_subsys->chnmon_active) {
814 css_update_chnmon(sch);
816 sch->channel_prog = orb->cpa;
817 /* Trigger the start function. */
818 s->ctrl |= (SCSW_FCTL_START_FUNC | SCSW_ACTL_START_PEND);
819 s->flags &= ~SCSW_FLAGS_MASK_PNO;
821 do_subchannel_work(sch, orb);
828 static void copy_irb_to_guest(IRB *dest, const IRB *src, PMCW *pmcw,
832 uint16_t stctl = src->scsw.ctrl & SCSW_CTRL_MASK_STCTL;
833 uint16_t actl = src->scsw.ctrl & SCSW_CTRL_MASK_ACTL;
835 copy_scsw_to_guest(&dest->scsw, &src->scsw);
837 for (i = 0; i < ARRAY_SIZE(dest->esw); i++) {
838 dest->esw[i] = cpu_to_be32(src->esw[i]);
840 for (i = 0; i < ARRAY_SIZE(dest->ecw); i++) {
841 dest->ecw[i] = cpu_to_be32(src->ecw[i]);
843 *irb_len = sizeof(*dest) - sizeof(dest->emw);
845 /* extended measurements enabled? */
846 if ((src->scsw.flags & SCSW_FLAGS_MASK_ESWF) ||
847 !(pmcw->flags & PMCW_FLAGS_MASK_TF) ||
848 !(pmcw->chars & PMCW_CHARS_MASK_XMWME)) {
851 /* extended measurements pending? */
852 if (!(stctl & SCSW_STCTL_STATUS_PEND)) {
855 if ((stctl & SCSW_STCTL_PRIMARY) ||
856 (stctl == SCSW_STCTL_SECONDARY) ||
857 ((stctl & SCSW_STCTL_INTERMEDIATE) && (actl & SCSW_ACTL_SUSP))) {
858 for (i = 0; i < ARRAY_SIZE(dest->emw); i++) {
859 dest->emw[i] = cpu_to_be32(src->emw[i]);
862 *irb_len = sizeof(*dest);
865 int css_do_tsch_get_irb(SubchDev *sch, IRB *target_irb, int *irb_len)
867 SCSW *s = &sch->curr_status.scsw;
868 PMCW *p = &sch->curr_status.pmcw;
872 if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
876 stctl = s->ctrl & SCSW_CTRL_MASK_STCTL;
878 /* Prepare the irb for the guest. */
879 memset(&irb, 0, sizeof(IRB));
881 /* Copy scsw from current status. */
882 memcpy(&irb.scsw, s, sizeof(SCSW));
883 if (stctl & SCSW_STCTL_STATUS_PEND) {
884 if (s->cstat & (SCSW_CSTAT_DATA_CHECK |
885 SCSW_CSTAT_CHN_CTRL_CHK |
886 SCSW_CSTAT_INTF_CTRL_CHK)) {
887 irb.scsw.flags |= SCSW_FLAGS_MASK_ESWF;
888 irb.esw[0] = 0x04804000;
890 irb.esw[0] = 0x00800000;
892 /* If a unit check is pending, copy sense data. */
893 if ((s->dstat & SCSW_DSTAT_UNIT_CHECK) &&
894 (p->chars & PMCW_CHARS_MASK_CSENSE)) {
895 irb.scsw.flags |= SCSW_FLAGS_MASK_ESWF | SCSW_FLAGS_MASK_ECTL;
896 memcpy(irb.ecw, sch->sense_data, sizeof(sch->sense_data));
897 irb.esw[1] = 0x01000000 | (sizeof(sch->sense_data) << 8);
900 /* Store the irb to the guest. */
901 copy_irb_to_guest(target_irb, &irb, p, irb_len);
903 return ((stctl & SCSW_STCTL_STATUS_PEND) == 0);
906 void css_do_tsch_update_subch(SubchDev *sch)
908 SCSW *s = &sch->curr_status.scsw;
909 PMCW *p = &sch->curr_status.pmcw;
914 stctl = s->ctrl & SCSW_CTRL_MASK_STCTL;
915 fctl = s->ctrl & SCSW_CTRL_MASK_FCTL;
916 actl = s->ctrl & SCSW_CTRL_MASK_ACTL;
918 /* Clear conditions on subchannel, if applicable. */
919 if (stctl & SCSW_STCTL_STATUS_PEND) {
920 s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
921 if ((stctl != (SCSW_STCTL_INTERMEDIATE | SCSW_STCTL_STATUS_PEND)) ||
922 ((fctl & SCSW_FCTL_HALT_FUNC) &&
923 (actl & SCSW_ACTL_SUSP))) {
924 s->ctrl &= ~SCSW_CTRL_MASK_FCTL;
926 if (stctl != (SCSW_STCTL_INTERMEDIATE | SCSW_STCTL_STATUS_PEND)) {
927 s->flags &= ~SCSW_FLAGS_MASK_PNO;
928 s->ctrl &= ~(SCSW_ACTL_RESUME_PEND |
929 SCSW_ACTL_START_PEND |
930 SCSW_ACTL_HALT_PEND |
931 SCSW_ACTL_CLEAR_PEND |
934 if ((actl & SCSW_ACTL_SUSP) &&
935 (fctl & SCSW_FCTL_START_FUNC)) {
936 s->flags &= ~SCSW_FLAGS_MASK_PNO;
937 if (fctl & SCSW_FCTL_HALT_FUNC) {
938 s->ctrl &= ~(SCSW_ACTL_RESUME_PEND |
939 SCSW_ACTL_START_PEND |
940 SCSW_ACTL_HALT_PEND |
941 SCSW_ACTL_CLEAR_PEND |
944 s->ctrl &= ~SCSW_ACTL_RESUME_PEND;
948 /* Clear pending sense data. */
949 if (p->chars & PMCW_CHARS_MASK_CSENSE) {
950 memset(sch->sense_data, 0 , sizeof(sch->sense_data));
955 static void copy_crw_to_guest(CRW *dest, const CRW *src)
957 dest->flags = cpu_to_be16(src->flags);
958 dest->rsid = cpu_to_be16(src->rsid);
961 int css_do_stcrw(CRW *crw)
963 CrwContainer *crw_cont;
966 crw_cont = QTAILQ_FIRST(&channel_subsys->pending_crws);
968 QTAILQ_REMOVE(&channel_subsys->pending_crws, crw_cont, sibling);
969 copy_crw_to_guest(crw, &crw_cont->crw);
973 /* List was empty, turn crw machine checks on again. */
974 memset(crw, 0, sizeof(*crw));
975 channel_subsys->do_crw_mchk = true;
982 static void copy_crw_from_guest(CRW *dest, const CRW *src)
984 dest->flags = be16_to_cpu(src->flags);
985 dest->rsid = be16_to_cpu(src->rsid);
988 void css_undo_stcrw(CRW *crw)
990 CrwContainer *crw_cont;
992 crw_cont = g_try_malloc0(sizeof(CrwContainer));
994 channel_subsys->crws_lost = true;
997 copy_crw_from_guest(&crw_cont->crw, crw);
999 QTAILQ_INSERT_HEAD(&channel_subsys->pending_crws, crw_cont, sibling);
1002 int css_do_tpi(IOIntCode *int_code, int lowcore)
1004 /* No pending interrupts for !KVM. */
1008 int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid,
1009 int rfmt, void *buf)
1013 uint32_t chpid_type_word;
1017 css = channel_subsys->css[channel_subsys->default_cssid];
1019 css = channel_subsys->css[cssid];
1025 for (i = f_chpid; i <= l_chpid; i++) {
1026 if (css->chpids[i].in_use) {
1027 chpid_type_word = 0x80000000 | (css->chpids[i].type << 8) | i;
1029 words[0] = cpu_to_be32(chpid_type_word);
1031 memcpy(buf + desc_size, words, 8);
1033 } else if (rfmt == 1) {
1034 words[0] = cpu_to_be32(chpid_type_word);
1042 memcpy(buf + desc_size, words, 32);
1050 void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo)
1052 /* dct is currently ignored (not really meaningful for our devices) */
1053 /* TODO: Don't ignore mbk. */
1054 if (update && !channel_subsys->chnmon_active) {
1055 /* Enable measuring. */
1056 channel_subsys->chnmon_area = mbo;
1057 channel_subsys->chnmon_active = true;
1059 if (!update && channel_subsys->chnmon_active) {
1060 /* Disable measuring. */
1061 channel_subsys->chnmon_area = 0;
1062 channel_subsys->chnmon_active = false;
1066 int css_do_rsch(SubchDev *sch)
1068 SCSW *s = &sch->curr_status.scsw;
1069 PMCW *p = &sch->curr_status.pmcw;
1072 if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
1077 if (s->ctrl & SCSW_STCTL_STATUS_PEND) {
1082 if (((s->ctrl & SCSW_CTRL_MASK_FCTL) != SCSW_FCTL_START_FUNC) ||
1083 (s->ctrl & SCSW_ACTL_RESUME_PEND) ||
1084 (!(s->ctrl & SCSW_ACTL_SUSP))) {
1089 /* If monitoring is active, update counter. */
1090 if (channel_subsys->chnmon_active) {
1091 css_update_chnmon(sch);
1094 s->ctrl |= SCSW_ACTL_RESUME_PEND;
1095 do_subchannel_work(sch, NULL);
1102 int css_do_rchp(uint8_t cssid, uint8_t chpid)
1106 if (cssid > channel_subsys->max_cssid) {
1109 if (channel_subsys->max_cssid == 0) {
1110 real_cssid = channel_subsys->default_cssid;
1114 if (!channel_subsys->css[real_cssid]) {
1118 if (!channel_subsys->css[real_cssid]->chpids[chpid].in_use) {
1122 if (!channel_subsys->css[real_cssid]->chpids[chpid].is_virtual) {
1124 "rchp unsupported for non-virtual chpid %x.%02x!\n",
1129 /* We don't really use a channel path, so we're done here. */
1130 css_queue_crw(CRW_RSC_CHP, CRW_ERC_INIT,
1131 channel_subsys->max_cssid > 0 ? 1 : 0, chpid);
1132 if (channel_subsys->max_cssid > 0) {
1133 css_queue_crw(CRW_RSC_CHP, CRW_ERC_INIT, 0, real_cssid << 8);
1138 bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid)
1143 real_cssid = (!m && (cssid == 0)) ? channel_subsys->default_cssid : cssid;
1144 if (real_cssid > MAX_CSSID || ssid > MAX_SSID ||
1145 !channel_subsys->css[real_cssid] ||
1146 !channel_subsys->css[real_cssid]->sch_set[ssid]) {
1149 set = channel_subsys->css[real_cssid]->sch_set[ssid];
1150 return schid > find_last_bit(set->schids_used,
1151 (MAX_SCHID + 1) / sizeof(unsigned long));
1154 static int css_add_virtual_chpid(uint8_t cssid, uint8_t chpid, uint8_t type)
1158 trace_css_chpid_add(cssid, chpid, type);
1159 if (cssid > MAX_CSSID) {
1162 css = channel_subsys->css[cssid];
1166 if (css->chpids[chpid].in_use) {
1169 css->chpids[chpid].in_use = 1;
1170 css->chpids[chpid].type = type;
1171 css->chpids[chpid].is_virtual = 1;
1173 css_generate_chp_crws(cssid, chpid);
1178 void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type)
1180 PMCW *p = &sch->curr_status.pmcw;
1181 SCSW *s = &sch->curr_status.scsw;
1183 CssImage *css = channel_subsys->css[sch->cssid];
1185 assert(css != NULL);
1186 memset(p, 0, sizeof(PMCW));
1187 p->flags |= PMCW_FLAGS_MASK_DNV;
1188 p->devno = sch->devno;
1193 p->chpid[0] = chpid;
1194 if (!css->chpids[chpid].in_use) {
1195 css_add_virtual_chpid(sch->cssid, chpid, type);
1198 memset(s, 0, sizeof(SCSW));
1199 sch->curr_status.mba = 0;
1200 for (i = 0; i < ARRAY_SIZE(sch->curr_status.mda); i++) {
1201 sch->curr_status.mda[i] = 0;
1205 SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid, uint16_t schid)
1209 real_cssid = (!m && (cssid == 0)) ? channel_subsys->default_cssid : cssid;
1211 if (!channel_subsys->css[real_cssid]) {
1215 if (!channel_subsys->css[real_cssid]->sch_set[ssid]) {
1219 return channel_subsys->css[real_cssid]->sch_set[ssid]->sch[schid];
1222 bool css_subch_visible(SubchDev *sch)
1224 if (sch->ssid > channel_subsys->max_ssid) {
1228 if (sch->cssid != channel_subsys->default_cssid) {
1229 return (channel_subsys->max_cssid > 0);
1235 bool css_present(uint8_t cssid)
1237 return (channel_subsys->css[cssid] != NULL);
1240 bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno)
1242 if (!channel_subsys->css[cssid]) {
1245 if (!channel_subsys->css[cssid]->sch_set[ssid]) {
1249 return !!test_bit(devno,
1250 channel_subsys->css[cssid]->sch_set[ssid]->devnos_used);
1253 void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
1254 uint16_t devno, SubchDev *sch)
1259 trace_css_assign_subch(sch ? "assign" : "deassign", cssid, ssid, schid,
1261 if (!channel_subsys->css[cssid]) {
1263 "Suspicious call to %s (%x.%x.%04x) for non-existing css!\n",
1264 __func__, cssid, ssid, schid);
1267 css = channel_subsys->css[cssid];
1269 if (!css->sch_set[ssid]) {
1270 css->sch_set[ssid] = g_malloc0(sizeof(SubchSet));
1272 s_set = css->sch_set[ssid];
1274 s_set->sch[schid] = sch;
1276 set_bit(schid, s_set->schids_used);
1277 set_bit(devno, s_set->devnos_used);
1279 clear_bit(schid, s_set->schids_used);
1280 clear_bit(devno, s_set->devnos_used);
1284 void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid)
1286 CrwContainer *crw_cont;
1288 trace_css_crw(rsc, erc, rsid, chain ? "(chained)" : "");
1289 /* TODO: Maybe use a static crw pool? */
1290 crw_cont = g_try_malloc0(sizeof(CrwContainer));
1292 channel_subsys->crws_lost = true;
1295 crw_cont->crw.flags = (rsc << 8) | erc;
1297 crw_cont->crw.flags |= CRW_FLAGS_MASK_C;
1299 crw_cont->crw.rsid = rsid;
1300 if (channel_subsys->crws_lost) {
1301 crw_cont->crw.flags |= CRW_FLAGS_MASK_R;
1302 channel_subsys->crws_lost = false;
1305 QTAILQ_INSERT_TAIL(&channel_subsys->pending_crws, crw_cont, sibling);
1307 if (channel_subsys->do_crw_mchk) {
1308 channel_subsys->do_crw_mchk = false;
1309 /* Inject crw pending machine check. */
1314 void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,
1315 int hotplugged, int add)
1317 uint8_t guest_cssid;
1320 if (add && !hotplugged) {
1323 if (channel_subsys->max_cssid == 0) {
1324 /* Default cssid shows up as 0. */
1325 guest_cssid = (cssid == channel_subsys->default_cssid) ? 0 : cssid;
1327 /* Show real cssid to the guest. */
1328 guest_cssid = cssid;
1331 * Only notify for higher subchannel sets/channel subsystems if the
1332 * guest has enabled it.
1334 if ((ssid > channel_subsys->max_ssid) ||
1335 (guest_cssid > channel_subsys->max_cssid) ||
1336 ((channel_subsys->max_cssid == 0) &&
1337 (cssid != channel_subsys->default_cssid))) {
1340 chain_crw = (channel_subsys->max_ssid > 0) ||
1341 (channel_subsys->max_cssid > 0);
1342 css_queue_crw(CRW_RSC_SUBCH, CRW_ERC_IPI, chain_crw ? 1 : 0, schid);
1344 css_queue_crw(CRW_RSC_SUBCH, CRW_ERC_IPI, 0,
1345 (guest_cssid << 8) | (ssid << 4));
1349 void css_generate_chp_crws(uint8_t cssid, uint8_t chpid)
1354 void css_generate_css_crws(uint8_t cssid)
1356 css_queue_crw(CRW_RSC_CSS, 0, 0, cssid);
1359 int css_enable_mcsse(void)
1361 trace_css_enable_facility("mcsse");
1362 channel_subsys->max_cssid = MAX_CSSID;
1366 int css_enable_mss(void)
1368 trace_css_enable_facility("mss");
1369 channel_subsys->max_ssid = MAX_SSID;
1373 void subch_device_save(SubchDev *s, QEMUFile *f)
1377 qemu_put_byte(f, s->cssid);
1378 qemu_put_byte(f, s->ssid);
1379 qemu_put_be16(f, s->schid);
1380 qemu_put_be16(f, s->devno);
1381 qemu_put_byte(f, s->thinint_active);
1384 qemu_put_be32(f, s->curr_status.pmcw.intparm);
1385 qemu_put_be16(f, s->curr_status.pmcw.flags);
1386 qemu_put_be16(f, s->curr_status.pmcw.devno);
1387 qemu_put_byte(f, s->curr_status.pmcw.lpm);
1388 qemu_put_byte(f, s->curr_status.pmcw.pnom);
1389 qemu_put_byte(f, s->curr_status.pmcw.lpum);
1390 qemu_put_byte(f, s->curr_status.pmcw.pim);
1391 qemu_put_be16(f, s->curr_status.pmcw.mbi);
1392 qemu_put_byte(f, s->curr_status.pmcw.pom);
1393 qemu_put_byte(f, s->curr_status.pmcw.pam);
1394 qemu_put_buffer(f, s->curr_status.pmcw.chpid, 8);
1395 qemu_put_be32(f, s->curr_status.pmcw.chars);
1397 qemu_put_be16(f, s->curr_status.scsw.flags);
1398 qemu_put_be16(f, s->curr_status.scsw.ctrl);
1399 qemu_put_be32(f, s->curr_status.scsw.cpa);
1400 qemu_put_byte(f, s->curr_status.scsw.dstat);
1401 qemu_put_byte(f, s->curr_status.scsw.cstat);
1402 qemu_put_be16(f, s->curr_status.scsw.count);
1403 qemu_put_be64(f, s->curr_status.mba);
1404 qemu_put_buffer(f, s->curr_status.mda, 4);
1406 qemu_put_buffer(f, s->sense_data, 32);
1407 qemu_put_be64(f, s->channel_prog);
1409 qemu_put_byte(f, s->last_cmd.cmd_code);
1410 qemu_put_byte(f, s->last_cmd.flags);
1411 qemu_put_be16(f, s->last_cmd.count);
1412 qemu_put_be32(f, s->last_cmd.cda);
1413 qemu_put_byte(f, s->last_cmd_valid);
1414 qemu_put_byte(f, s->id.reserved);
1415 qemu_put_be16(f, s->id.cu_type);
1416 qemu_put_byte(f, s->id.cu_model);
1417 qemu_put_be16(f, s->id.dev_type);
1418 qemu_put_byte(f, s->id.dev_model);
1419 qemu_put_byte(f, s->id.unused);
1420 for (i = 0; i < ARRAY_SIZE(s->id.ciw); i++) {
1421 qemu_put_byte(f, s->id.ciw[i].type);
1422 qemu_put_byte(f, s->id.ciw[i].command);
1423 qemu_put_be16(f, s->id.ciw[i].count);
1425 qemu_put_byte(f, s->ccw_fmt_1);
1426 qemu_put_byte(f, s->ccw_no_data_cnt);
1430 int subch_device_load(SubchDev *s, QEMUFile *f)
1434 s->cssid = qemu_get_byte(f);
1435 s->ssid = qemu_get_byte(f);
1436 s->schid = qemu_get_be16(f);
1437 s->devno = qemu_get_be16(f);
1438 s->thinint_active = qemu_get_byte(f);
1441 s->curr_status.pmcw.intparm = qemu_get_be32(f);
1442 s->curr_status.pmcw.flags = qemu_get_be16(f);
1443 s->curr_status.pmcw.devno = qemu_get_be16(f);
1444 s->curr_status.pmcw.lpm = qemu_get_byte(f);
1445 s->curr_status.pmcw.pnom = qemu_get_byte(f);
1446 s->curr_status.pmcw.lpum = qemu_get_byte(f);
1447 s->curr_status.pmcw.pim = qemu_get_byte(f);
1448 s->curr_status.pmcw.mbi = qemu_get_be16(f);
1449 s->curr_status.pmcw.pom = qemu_get_byte(f);
1450 s->curr_status.pmcw.pam = qemu_get_byte(f);
1451 qemu_get_buffer(f, s->curr_status.pmcw.chpid, 8);
1452 s->curr_status.pmcw.chars = qemu_get_be32(f);
1454 s->curr_status.scsw.flags = qemu_get_be16(f);
1455 s->curr_status.scsw.ctrl = qemu_get_be16(f);
1456 s->curr_status.scsw.cpa = qemu_get_be32(f);
1457 s->curr_status.scsw.dstat = qemu_get_byte(f);
1458 s->curr_status.scsw.cstat = qemu_get_byte(f);
1459 s->curr_status.scsw.count = qemu_get_be16(f);
1460 s->curr_status.mba = qemu_get_be64(f);
1461 qemu_get_buffer(f, s->curr_status.mda, 4);
1463 qemu_get_buffer(f, s->sense_data, 32);
1464 s->channel_prog = qemu_get_be64(f);
1466 s->last_cmd.cmd_code = qemu_get_byte(f);
1467 s->last_cmd.flags = qemu_get_byte(f);
1468 s->last_cmd.count = qemu_get_be16(f);
1469 s->last_cmd.cda = qemu_get_be32(f);
1470 s->last_cmd_valid = qemu_get_byte(f);
1471 s->id.reserved = qemu_get_byte(f);
1472 s->id.cu_type = qemu_get_be16(f);
1473 s->id.cu_model = qemu_get_byte(f);
1474 s->id.dev_type = qemu_get_be16(f);
1475 s->id.dev_model = qemu_get_byte(f);
1476 s->id.unused = qemu_get_byte(f);
1477 for (i = 0; i < ARRAY_SIZE(s->id.ciw); i++) {
1478 s->id.ciw[i].type = qemu_get_byte(f);
1479 s->id.ciw[i].command = qemu_get_byte(f);
1480 s->id.ciw[i].count = qemu_get_be16(f);
1482 s->ccw_fmt_1 = qemu_get_byte(f);
1483 s->ccw_no_data_cnt = qemu_get_byte(f);
1485 * Hack alert. We don't migrate the channel subsystem status (no
1486 * device!), but we need to find out if the guest enabled mss/mcss-e.
1487 * If the subchannel is enabled, it certainly was able to access it,
1488 * so adjust the max_ssid/max_cssid values for relevant ssid/cssid
1489 * values. This is not watertight, but better than nothing.
1491 if (s->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA) {
1493 channel_subsys->max_ssid = MAX_SSID;
1495 if (s->cssid != channel_subsys->default_cssid) {
1496 channel_subsys->max_cssid = MAX_CSSID;
1503 static void css_init(void)
1505 channel_subsys = g_malloc0(sizeof(*channel_subsys));
1506 QTAILQ_INIT(&channel_subsys->pending_crws);
1507 channel_subsys->do_crw_mchk = true;
1508 channel_subsys->crws_lost = false;
1509 channel_subsys->chnmon_active = false;
1510 QTAILQ_INIT(&channel_subsys->io_adapters);
1512 machine_init(css_init);
1514 void css_reset_sch(SubchDev *sch)
1516 PMCW *p = &sch->curr_status.pmcw;
1518 if ((p->flags & PMCW_FLAGS_MASK_ENA) != 0 && sch->disable_cb) {
1519 sch->disable_cb(sch);
1523 p->flags &= ~(PMCW_FLAGS_MASK_ISC | PMCW_FLAGS_MASK_ENA |
1524 PMCW_FLAGS_MASK_LM | PMCW_FLAGS_MASK_MME |
1525 PMCW_FLAGS_MASK_MP | PMCW_FLAGS_MASK_TF);
1526 p->flags |= PMCW_FLAGS_MASK_DNV;
1527 p->devno = sch->devno;
1535 p->chars &= ~(PMCW_CHARS_MASK_MBFC | PMCW_CHARS_MASK_XMWME |
1536 PMCW_CHARS_MASK_CSENSE);
1538 memset(&sch->curr_status.scsw, 0, sizeof(sch->curr_status.scsw));
1539 sch->curr_status.mba = 0;
1541 sch->channel_prog = 0x0;
1542 sch->last_cmd_valid = false;
1543 sch->thinint_active = false;
1546 void css_reset(void)
1548 CrwContainer *crw_cont;
1550 /* Clean up monitoring. */
1551 channel_subsys->chnmon_active = false;
1552 channel_subsys->chnmon_area = 0;
1554 /* Clear pending CRWs. */
1555 while ((crw_cont = QTAILQ_FIRST(&channel_subsys->pending_crws))) {
1556 QTAILQ_REMOVE(&channel_subsys->pending_crws, crw_cont, sibling);
1559 channel_subsys->do_crw_mchk = true;
1560 channel_subsys->crws_lost = false;
1562 /* Reset maximum ids. */
1563 channel_subsys->max_cssid = 0;
1564 channel_subsys->max_ssid = 0;