2013-01-24 03:28:06 +01:00
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/*
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* Channel subsystem base support.
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*
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* Copyright 2012 IBM Corp.
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* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include <hw/qdev.h>
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#include "qemu/bitops.h"
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#include "cpu.h"
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#include "ioinst.h"
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#include "css.h"
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#include "trace.h"
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typedef struct CrwContainer {
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CRW crw;
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QTAILQ_ENTRY(CrwContainer) sibling;
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} CrwContainer;
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typedef struct ChpInfo {
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uint8_t in_use;
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uint8_t type;
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uint8_t is_virtual;
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} ChpInfo;
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typedef struct SubchSet {
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SubchDev *sch[MAX_SCHID + 1];
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unsigned long schids_used[BITS_TO_LONGS(MAX_SCHID + 1)];
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unsigned long devnos_used[BITS_TO_LONGS(MAX_SCHID + 1)];
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} SubchSet;
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typedef struct CssImage {
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SubchSet *sch_set[MAX_SSID + 1];
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ChpInfo chpids[MAX_CHPID + 1];
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} CssImage;
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typedef struct ChannelSubSys {
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QTAILQ_HEAD(, CrwContainer) pending_crws;
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bool do_crw_mchk;
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bool crws_lost;
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uint8_t max_cssid;
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uint8_t max_ssid;
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bool chnmon_active;
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uint64_t chnmon_area;
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CssImage *css[MAX_CSSID + 1];
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uint8_t default_cssid;
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} ChannelSubSys;
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static ChannelSubSys *channel_subsys;
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int css_create_css_image(uint8_t cssid, bool default_image)
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{
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trace_css_new_image(cssid, default_image ? "(default)" : "");
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if (cssid > MAX_CSSID) {
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return -EINVAL;
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}
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if (channel_subsys->css[cssid]) {
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return -EBUSY;
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}
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channel_subsys->css[cssid] = g_malloc0(sizeof(CssImage));
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if (default_image) {
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channel_subsys->default_cssid = cssid;
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}
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return 0;
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}
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static uint16_t css_build_subchannel_id(SubchDev *sch)
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{
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if (channel_subsys->max_cssid > 0) {
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return (sch->cssid << 8) | (1 << 3) | (sch->ssid << 1) | 1;
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}
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return (sch->ssid << 1) | 1;
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}
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static void css_inject_io_interrupt(SubchDev *sch)
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{
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S390CPU *cpu = s390_cpu_addr2state(0);
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uint8_t isc = (sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ISC) >> 11;
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trace_css_io_interrupt(sch->cssid, sch->ssid, sch->schid,
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sch->curr_status.pmcw.intparm, isc, "");
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s390_io_interrupt(cpu,
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css_build_subchannel_id(sch),
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sch->schid,
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sch->curr_status.pmcw.intparm,
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(0x80 >> isc) << 24);
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}
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void css_conditional_io_interrupt(SubchDev *sch)
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{
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/*
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* If the subchannel is not currently status pending, make it pending
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* with alert status.
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*/
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if (!(sch->curr_status.scsw.ctrl & SCSW_STCTL_STATUS_PEND)) {
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S390CPU *cpu = s390_cpu_addr2state(0);
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uint8_t isc = (sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ISC) >> 11;
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trace_css_io_interrupt(sch->cssid, sch->ssid, sch->schid,
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sch->curr_status.pmcw.intparm, isc,
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"(unsolicited)");
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sch->curr_status.scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
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sch->curr_status.scsw.ctrl |=
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SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
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/* Inject an I/O interrupt. */
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s390_io_interrupt(cpu,
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css_build_subchannel_id(sch),
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sch->schid,
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sch->curr_status.pmcw.intparm,
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(0x80 >> isc) << 24);
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}
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}
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static void sch_handle_clear_func(SubchDev *sch)
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{
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PMCW *p = &sch->curr_status.pmcw;
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SCSW *s = &sch->curr_status.scsw;
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int path;
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/* Path management: In our simple css, we always choose the only path. */
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path = 0x80;
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/* Reset values prior to 'issueing the clear signal'. */
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p->lpum = 0;
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p->pom = 0xff;
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s->flags &= ~SCSW_FLAGS_MASK_PNO;
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/* We always 'attempt to issue the clear signal', and we always succeed. */
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sch->orb = NULL;
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sch->channel_prog = 0x0;
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sch->last_cmd_valid = false;
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s->ctrl &= ~SCSW_ACTL_CLEAR_PEND;
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s->ctrl |= SCSW_STCTL_STATUS_PEND;
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s->dstat = 0;
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s->cstat = 0;
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p->lpum = path;
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}
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static void sch_handle_halt_func(SubchDev *sch)
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{
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PMCW *p = &sch->curr_status.pmcw;
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SCSW *s = &sch->curr_status.scsw;
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int path;
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/* Path management: In our simple css, we always choose the only path. */
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path = 0x80;
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/* We always 'attempt to issue the halt signal', and we always succeed. */
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sch->orb = NULL;
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sch->channel_prog = 0x0;
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sch->last_cmd_valid = false;
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s->ctrl &= ~SCSW_ACTL_HALT_PEND;
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s->ctrl |= SCSW_STCTL_STATUS_PEND;
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if ((s->ctrl & (SCSW_ACTL_SUBCH_ACTIVE | SCSW_ACTL_DEVICE_ACTIVE)) ||
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!((s->ctrl & SCSW_ACTL_START_PEND) ||
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(s->ctrl & SCSW_ACTL_SUSP))) {
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s->dstat = SCSW_DSTAT_DEVICE_END;
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}
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s->cstat = 0;
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p->lpum = path;
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}
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static void copy_sense_id_to_guest(SenseId *dest, SenseId *src)
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{
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int i;
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dest->reserved = src->reserved;
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dest->cu_type = cpu_to_be16(src->cu_type);
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dest->cu_model = src->cu_model;
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dest->dev_type = cpu_to_be16(src->dev_type);
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dest->dev_model = src->dev_model;
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dest->unused = src->unused;
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for (i = 0; i < ARRAY_SIZE(dest->ciw); i++) {
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dest->ciw[i].type = src->ciw[i].type;
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dest->ciw[i].command = src->ciw[i].command;
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dest->ciw[i].count = cpu_to_be16(src->ciw[i].count);
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}
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}
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static CCW1 copy_ccw_from_guest(hwaddr addr)
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{
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CCW1 tmp;
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CCW1 ret;
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cpu_physical_memory_read(addr, &tmp, sizeof(tmp));
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ret.cmd_code = tmp.cmd_code;
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ret.flags = tmp.flags;
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ret.count = be16_to_cpu(tmp.count);
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ret.cda = be32_to_cpu(tmp.cda);
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return ret;
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}
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static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_addr)
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{
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int ret;
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bool check_len;
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int len;
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CCW1 ccw;
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if (!ccw_addr) {
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return -EIO;
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}
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ccw = copy_ccw_from_guest(ccw_addr);
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/* Check for invalid command codes. */
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if ((ccw.cmd_code & 0x0f) == 0) {
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return -EINVAL;
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}
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if (((ccw.cmd_code & 0x0f) == CCW_CMD_TIC) &&
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((ccw.cmd_code & 0xf0) != 0)) {
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return -EINVAL;
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}
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if (ccw.flags & CCW_FLAG_SUSPEND) {
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2013-01-28 17:01:30 +01:00
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return -EINPROGRESS;
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2013-01-24 03:28:06 +01:00
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}
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check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
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/* Look at the command. */
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switch (ccw.cmd_code) {
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case CCW_CMD_NOOP:
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/* Nothing to do. */
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ret = 0;
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break;
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case CCW_CMD_BASIC_SENSE:
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if (check_len) {
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if (ccw.count != sizeof(sch->sense_data)) {
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ret = -EINVAL;
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break;
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}
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}
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len = MIN(ccw.count, sizeof(sch->sense_data));
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cpu_physical_memory_write(ccw.cda, sch->sense_data, len);
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sch->curr_status.scsw.count = ccw.count - len;
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memset(sch->sense_data, 0, sizeof(sch->sense_data));
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ret = 0;
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break;
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case CCW_CMD_SENSE_ID:
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{
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SenseId sense_id;
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copy_sense_id_to_guest(&sense_id, &sch->id);
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/* Sense ID information is device specific. */
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if (check_len) {
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if (ccw.count != sizeof(sense_id)) {
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ret = -EINVAL;
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break;
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}
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}
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len = MIN(ccw.count, sizeof(sense_id));
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/*
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* Only indicate 0xff in the first sense byte if we actually
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* have enough place to store at least bytes 0-3.
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*/
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if (len >= 4) {
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sense_id.reserved = 0xff;
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} else {
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sense_id.reserved = 0;
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}
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cpu_physical_memory_write(ccw.cda, &sense_id, len);
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sch->curr_status.scsw.count = ccw.count - len;
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ret = 0;
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break;
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}
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case CCW_CMD_TIC:
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if (sch->last_cmd_valid && (sch->last_cmd.cmd_code == CCW_CMD_TIC)) {
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ret = -EINVAL;
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break;
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}
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if (ccw.flags & (CCW_FLAG_CC | CCW_FLAG_DC)) {
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ret = -EINVAL;
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break;
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}
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sch->channel_prog = ccw.cda;
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ret = -EAGAIN;
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break;
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default:
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if (sch->ccw_cb) {
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/* Handle device specific commands. */
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ret = sch->ccw_cb(sch, ccw);
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} else {
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2013-01-28 17:01:30 +01:00
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ret = -ENOSYS;
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2013-01-24 03:28:06 +01:00
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}
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break;
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}
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sch->last_cmd = ccw;
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sch->last_cmd_valid = true;
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if (ret == 0) {
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if (ccw.flags & CCW_FLAG_CC) {
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sch->channel_prog += 8;
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ret = -EAGAIN;
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}
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}
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return ret;
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}
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static void sch_handle_start_func(SubchDev *sch)
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{
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PMCW *p = &sch->curr_status.pmcw;
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SCSW *s = &sch->curr_status.scsw;
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ORB *orb = sch->orb;
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int path;
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int ret;
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/* Path management: In our simple css, we always choose the only path. */
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path = 0x80;
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if (!(s->ctrl & SCSW_ACTL_SUSP)) {
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/* Look at the orb and try to execute the channel program. */
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p->intparm = orb->intparm;
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if (!(orb->lpm & path)) {
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/* Generate a deferred cc 3 condition. */
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s->flags |= SCSW_FLAGS_MASK_CC;
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s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
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s->ctrl |= (SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND);
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return;
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}
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} else {
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s->ctrl &= ~(SCSW_ACTL_SUSP | SCSW_ACTL_RESUME_PEND);
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}
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sch->last_cmd_valid = false;
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do {
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ret = css_interpret_ccw(sch, sch->channel_prog);
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switch (ret) {
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case -EAGAIN:
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/* ccw chain, continue processing */
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break;
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case 0:
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/* success */
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s->ctrl &= ~SCSW_ACTL_START_PEND;
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s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
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s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
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SCSW_STCTL_STATUS_PEND;
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s->dstat = SCSW_DSTAT_CHANNEL_END | SCSW_DSTAT_DEVICE_END;
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break;
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2013-01-28 17:01:30 +01:00
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case -ENOSYS:
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2013-01-24 03:28:06 +01:00
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/* unsupported command, generate unit check (command reject) */
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s->ctrl &= ~SCSW_ACTL_START_PEND;
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s->dstat = SCSW_DSTAT_UNIT_CHECK;
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/* Set sense bit 0 in ecw0. */
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sch->sense_data[0] = 0x80;
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s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
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s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
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SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
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break;
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case -EFAULT:
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|
|
/* memory problem, generate channel data check */
|
|
|
|
s->ctrl &= ~SCSW_ACTL_START_PEND;
|
|
|
|
s->cstat = SCSW_CSTAT_DATA_CHECK;
|
|
|
|
s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
|
|
|
|
s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
|
|
|
|
SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
|
|
|
|
break;
|
|
|
|
case -EBUSY:
|
|
|
|
/* subchannel busy, generate deferred cc 1 */
|
|
|
|
s->flags &= ~SCSW_FLAGS_MASK_CC;
|
|
|
|
s->flags |= (1 << 8);
|
|
|
|
s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
|
|
|
|
s->ctrl |= SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
|
|
|
|
break;
|
2013-01-28 17:01:30 +01:00
|
|
|
case -EINPROGRESS:
|
2013-01-24 03:28:06 +01:00
|
|
|
/* channel program has been suspended */
|
|
|
|
s->ctrl &= ~SCSW_ACTL_START_PEND;
|
|
|
|
s->ctrl |= SCSW_ACTL_SUSP;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
/* error, generate channel program check */
|
|
|
|
s->ctrl &= ~SCSW_ACTL_START_PEND;
|
|
|
|
s->cstat = SCSW_CSTAT_PROG_CHECK;
|
|
|
|
s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
|
|
|
|
s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
|
|
|
|
SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} while (ret == -EAGAIN);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* On real machines, this would run asynchronously to the main vcpus.
|
|
|
|
* We might want to make some parts of the ssch handling (interpreting
|
|
|
|
* read/writes) asynchronous later on if we start supporting more than
|
|
|
|
* our current very simple devices.
|
|
|
|
*/
|
|
|
|
static void do_subchannel_work(SubchDev *sch)
|
|
|
|
{
|
|
|
|
|
|
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
|
|
|
|
|
|
if (s->ctrl & SCSW_FCTL_CLEAR_FUNC) {
|
|
|
|
sch_handle_clear_func(sch);
|
|
|
|
} else if (s->ctrl & SCSW_FCTL_HALT_FUNC) {
|
|
|
|
sch_handle_halt_func(sch);
|
|
|
|
} else if (s->ctrl & SCSW_FCTL_START_FUNC) {
|
|
|
|
sch_handle_start_func(sch);
|
|
|
|
} else {
|
|
|
|
/* Cannot happen. */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
css_inject_io_interrupt(sch);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void copy_pmcw_to_guest(PMCW *dest, const PMCW *src)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
dest->intparm = cpu_to_be32(src->intparm);
|
|
|
|
dest->flags = cpu_to_be16(src->flags);
|
|
|
|
dest->devno = cpu_to_be16(src->devno);
|
|
|
|
dest->lpm = src->lpm;
|
|
|
|
dest->pnom = src->pnom;
|
|
|
|
dest->lpum = src->lpum;
|
|
|
|
dest->pim = src->pim;
|
|
|
|
dest->mbi = cpu_to_be16(src->mbi);
|
|
|
|
dest->pom = src->pom;
|
|
|
|
dest->pam = src->pam;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dest->chpid); i++) {
|
|
|
|
dest->chpid[i] = src->chpid[i];
|
|
|
|
}
|
|
|
|
dest->chars = cpu_to_be32(src->chars);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void copy_scsw_to_guest(SCSW *dest, const SCSW *src)
|
|
|
|
{
|
|
|
|
dest->flags = cpu_to_be16(src->flags);
|
|
|
|
dest->ctrl = cpu_to_be16(src->ctrl);
|
|
|
|
dest->cpa = cpu_to_be32(src->cpa);
|
|
|
|
dest->dstat = src->dstat;
|
|
|
|
dest->cstat = src->cstat;
|
|
|
|
dest->count = cpu_to_be16(src->count);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void copy_schib_to_guest(SCHIB *dest, const SCHIB *src)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
copy_pmcw_to_guest(&dest->pmcw, &src->pmcw);
|
|
|
|
copy_scsw_to_guest(&dest->scsw, &src->scsw);
|
|
|
|
dest->mba = cpu_to_be64(src->mba);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dest->mda); i++) {
|
|
|
|
dest->mda[i] = src->mda[i];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_stsch(SubchDev *sch, SCHIB *schib)
|
|
|
|
{
|
|
|
|
/* Use current status. */
|
|
|
|
copy_schib_to_guest(schib, &sch->curr_status);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void copy_pmcw_from_guest(PMCW *dest, const PMCW *src)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
dest->intparm = be32_to_cpu(src->intparm);
|
|
|
|
dest->flags = be16_to_cpu(src->flags);
|
|
|
|
dest->devno = be16_to_cpu(src->devno);
|
|
|
|
dest->lpm = src->lpm;
|
|
|
|
dest->pnom = src->pnom;
|
|
|
|
dest->lpum = src->lpum;
|
|
|
|
dest->pim = src->pim;
|
|
|
|
dest->mbi = be16_to_cpu(src->mbi);
|
|
|
|
dest->pom = src->pom;
|
|
|
|
dest->pam = src->pam;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dest->chpid); i++) {
|
|
|
|
dest->chpid[i] = src->chpid[i];
|
|
|
|
}
|
|
|
|
dest->chars = be32_to_cpu(src->chars);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void copy_scsw_from_guest(SCSW *dest, const SCSW *src)
|
|
|
|
{
|
|
|
|
dest->flags = be16_to_cpu(src->flags);
|
|
|
|
dest->ctrl = be16_to_cpu(src->ctrl);
|
|
|
|
dest->cpa = be32_to_cpu(src->cpa);
|
|
|
|
dest->dstat = src->dstat;
|
|
|
|
dest->cstat = src->cstat;
|
|
|
|
dest->count = be16_to_cpu(src->count);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void copy_schib_from_guest(SCHIB *dest, const SCHIB *src)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
copy_pmcw_from_guest(&dest->pmcw, &src->pmcw);
|
|
|
|
copy_scsw_from_guest(&dest->scsw, &src->scsw);
|
|
|
|
dest->mba = be64_to_cpu(src->mba);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dest->mda); i++) {
|
|
|
|
dest->mda[i] = src->mda[i];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_msch(SubchDev *sch, SCHIB *orig_schib)
|
|
|
|
{
|
|
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
int ret;
|
|
|
|
SCHIB schib;
|
|
|
|
|
|
|
|
if (!(sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_DNV)) {
|
|
|
|
ret = 0;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->ctrl & SCSW_STCTL_STATUS_PEND) {
|
|
|
|
ret = -EINPROGRESS;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->ctrl &
|
|
|
|
(SCSW_FCTL_START_FUNC|SCSW_FCTL_HALT_FUNC|SCSW_FCTL_CLEAR_FUNC)) {
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
copy_schib_from_guest(&schib, orig_schib);
|
|
|
|
/* Only update the program-modifiable fields. */
|
|
|
|
p->intparm = schib.pmcw.intparm;
|
|
|
|
p->flags &= ~(PMCW_FLAGS_MASK_ISC | PMCW_FLAGS_MASK_ENA |
|
|
|
|
PMCW_FLAGS_MASK_LM | PMCW_FLAGS_MASK_MME |
|
|
|
|
PMCW_FLAGS_MASK_MP);
|
|
|
|
p->flags |= schib.pmcw.flags &
|
|
|
|
(PMCW_FLAGS_MASK_ISC | PMCW_FLAGS_MASK_ENA |
|
|
|
|
PMCW_FLAGS_MASK_LM | PMCW_FLAGS_MASK_MME |
|
|
|
|
PMCW_FLAGS_MASK_MP);
|
|
|
|
p->lpm = schib.pmcw.lpm;
|
|
|
|
p->mbi = schib.pmcw.mbi;
|
|
|
|
p->pom = schib.pmcw.pom;
|
|
|
|
p->chars &= ~(PMCW_CHARS_MASK_MBFC | PMCW_CHARS_MASK_CSENSE);
|
|
|
|
p->chars |= schib.pmcw.chars &
|
|
|
|
(PMCW_CHARS_MASK_MBFC | PMCW_CHARS_MASK_CSENSE);
|
|
|
|
sch->curr_status.mba = schib.mba;
|
|
|
|
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_xsch(SubchDev *sch)
|
|
|
|
{
|
|
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
|
|
|
|
ret = -ENODEV;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(s->ctrl & SCSW_CTRL_MASK_FCTL) ||
|
|
|
|
((s->ctrl & SCSW_CTRL_MASK_FCTL) != SCSW_FCTL_START_FUNC) ||
|
|
|
|
(!(s->ctrl &
|
|
|
|
(SCSW_ACTL_RESUME_PEND | SCSW_ACTL_START_PEND | SCSW_ACTL_SUSP))) ||
|
|
|
|
(s->ctrl & SCSW_ACTL_SUBCH_ACTIVE)) {
|
|
|
|
ret = -EINPROGRESS;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->ctrl & SCSW_CTRL_MASK_STCTL) {
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Cancel the current operation. */
|
|
|
|
s->ctrl &= ~(SCSW_FCTL_START_FUNC |
|
|
|
|
SCSW_ACTL_RESUME_PEND |
|
|
|
|
SCSW_ACTL_START_PEND |
|
|
|
|
SCSW_ACTL_SUSP);
|
|
|
|
sch->channel_prog = 0x0;
|
|
|
|
sch->last_cmd_valid = false;
|
|
|
|
sch->orb = NULL;
|
|
|
|
s->dstat = 0;
|
|
|
|
s->cstat = 0;
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_csch(SubchDev *sch)
|
|
|
|
{
|
|
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
|
|
|
|
ret = -ENODEV;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Trigger the clear function. */
|
|
|
|
s->ctrl &= ~(SCSW_CTRL_MASK_FCTL | SCSW_CTRL_MASK_ACTL);
|
|
|
|
s->ctrl |= SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_CLEAR_FUNC;
|
|
|
|
|
|
|
|
do_subchannel_work(sch);
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_hsch(SubchDev *sch)
|
|
|
|
{
|
|
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
|
|
|
|
ret = -ENODEV;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (((s->ctrl & SCSW_CTRL_MASK_STCTL) == SCSW_STCTL_STATUS_PEND) ||
|
|
|
|
(s->ctrl & (SCSW_STCTL_PRIMARY |
|
|
|
|
SCSW_STCTL_SECONDARY |
|
|
|
|
SCSW_STCTL_ALERT))) {
|
|
|
|
ret = -EINPROGRESS;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->ctrl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC)) {
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Trigger the halt function. */
|
|
|
|
s->ctrl |= SCSW_FCTL_HALT_FUNC;
|
|
|
|
s->ctrl &= ~SCSW_FCTL_START_FUNC;
|
|
|
|
if (((s->ctrl & SCSW_CTRL_MASK_ACTL) ==
|
|
|
|
(SCSW_ACTL_SUBCH_ACTIVE | SCSW_ACTL_DEVICE_ACTIVE)) &&
|
|
|
|
((s->ctrl & SCSW_CTRL_MASK_STCTL) == SCSW_STCTL_INTERMEDIATE)) {
|
|
|
|
s->ctrl &= ~SCSW_STCTL_STATUS_PEND;
|
|
|
|
}
|
|
|
|
s->ctrl |= SCSW_ACTL_HALT_PEND;
|
|
|
|
|
|
|
|
do_subchannel_work(sch);
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void css_update_chnmon(SubchDev *sch)
|
|
|
|
{
|
|
|
|
if (!(sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_MME)) {
|
|
|
|
/* Not active. */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/* The counter is conveniently located at the beginning of the struct. */
|
|
|
|
if (sch->curr_status.pmcw.chars & PMCW_CHARS_MASK_MBFC) {
|
|
|
|
/* Format 1, per-subchannel area. */
|
|
|
|
uint32_t count;
|
|
|
|
|
|
|
|
count = ldl_phys(sch->curr_status.mba);
|
|
|
|
count++;
|
|
|
|
stl_phys(sch->curr_status.mba, count);
|
|
|
|
} else {
|
|
|
|
/* Format 0, global area. */
|
|
|
|
uint32_t offset;
|
|
|
|
uint16_t count;
|
|
|
|
|
|
|
|
offset = sch->curr_status.pmcw.mbi << 5;
|
|
|
|
count = lduw_phys(channel_subsys->chnmon_area + offset);
|
|
|
|
count++;
|
|
|
|
stw_phys(channel_subsys->chnmon_area + offset, count);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_ssch(SubchDev *sch, ORB *orb)
|
|
|
|
{
|
|
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
|
|
|
|
ret = -ENODEV;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->ctrl & SCSW_STCTL_STATUS_PEND) {
|
|
|
|
ret = -EINPROGRESS;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->ctrl & (SCSW_FCTL_START_FUNC |
|
|
|
|
SCSW_FCTL_HALT_FUNC |
|
|
|
|
SCSW_FCTL_CLEAR_FUNC)) {
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If monitoring is active, update counter. */
|
|
|
|
if (channel_subsys->chnmon_active) {
|
|
|
|
css_update_chnmon(sch);
|
|
|
|
}
|
|
|
|
sch->orb = orb;
|
|
|
|
sch->channel_prog = orb->cpa;
|
|
|
|
/* Trigger the start function. */
|
|
|
|
s->ctrl |= (SCSW_FCTL_START_FUNC | SCSW_ACTL_START_PEND);
|
|
|
|
s->flags &= ~SCSW_FLAGS_MASK_PNO;
|
|
|
|
|
|
|
|
do_subchannel_work(sch);
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void copy_irb_to_guest(IRB *dest, const IRB *src)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
copy_scsw_to_guest(&dest->scsw, &src->scsw);
|
|
|
|
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dest->esw); i++) {
|
|
|
|
dest->esw[i] = cpu_to_be32(src->esw[i]);
|
|
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dest->ecw); i++) {
|
|
|
|
dest->ecw[i] = cpu_to_be32(src->ecw[i]);
|
|
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dest->emw); i++) {
|
|
|
|
dest->emw[i] = cpu_to_be32(src->emw[i]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_tsch(SubchDev *sch, IRB *target_irb)
|
|
|
|
{
|
|
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
uint16_t stctl;
|
|
|
|
uint16_t fctl;
|
|
|
|
uint16_t actl;
|
|
|
|
IRB irb;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
|
|
|
|
ret = 3;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
stctl = s->ctrl & SCSW_CTRL_MASK_STCTL;
|
|
|
|
fctl = s->ctrl & SCSW_CTRL_MASK_FCTL;
|
|
|
|
actl = s->ctrl & SCSW_CTRL_MASK_ACTL;
|
|
|
|
|
|
|
|
/* Prepare the irb for the guest. */
|
|
|
|
memset(&irb, 0, sizeof(IRB));
|
|
|
|
|
|
|
|
/* Copy scsw from current status. */
|
|
|
|
memcpy(&irb.scsw, s, sizeof(SCSW));
|
|
|
|
if (stctl & SCSW_STCTL_STATUS_PEND) {
|
|
|
|
if (s->cstat & (SCSW_CSTAT_DATA_CHECK |
|
|
|
|
SCSW_CSTAT_CHN_CTRL_CHK |
|
|
|
|
SCSW_CSTAT_INTF_CTRL_CHK)) {
|
|
|
|
irb.scsw.flags |= SCSW_FLAGS_MASK_ESWF;
|
|
|
|
irb.esw[0] = 0x04804000;
|
|
|
|
} else {
|
|
|
|
irb.esw[0] = 0x00800000;
|
|
|
|
}
|
|
|
|
/* If a unit check is pending, copy sense data. */
|
|
|
|
if ((s->dstat & SCSW_DSTAT_UNIT_CHECK) &&
|
|
|
|
(p->chars & PMCW_CHARS_MASK_CSENSE)) {
|
|
|
|
irb.scsw.flags |= SCSW_FLAGS_MASK_ESWF | SCSW_FLAGS_MASK_ECTL;
|
|
|
|
memcpy(irb.ecw, sch->sense_data, sizeof(sch->sense_data));
|
|
|
|
irb.esw[1] = 0x02000000 | (sizeof(sch->sense_data) << 8);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* Store the irb to the guest. */
|
|
|
|
copy_irb_to_guest(target_irb, &irb);
|
|
|
|
|
|
|
|
/* Clear conditions on subchannel, if applicable. */
|
|
|
|
if (stctl & SCSW_STCTL_STATUS_PEND) {
|
|
|
|
s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
|
|
|
|
if ((stctl != (SCSW_STCTL_INTERMEDIATE | SCSW_STCTL_STATUS_PEND)) ||
|
|
|
|
((fctl & SCSW_FCTL_HALT_FUNC) &&
|
|
|
|
(actl & SCSW_ACTL_SUSP))) {
|
|
|
|
s->ctrl &= ~SCSW_CTRL_MASK_FCTL;
|
|
|
|
}
|
|
|
|
if (stctl != (SCSW_STCTL_INTERMEDIATE | SCSW_STCTL_STATUS_PEND)) {
|
|
|
|
s->flags &= ~SCSW_FLAGS_MASK_PNO;
|
|
|
|
s->ctrl &= ~(SCSW_ACTL_RESUME_PEND |
|
|
|
|
SCSW_ACTL_START_PEND |
|
|
|
|
SCSW_ACTL_HALT_PEND |
|
|
|
|
SCSW_ACTL_CLEAR_PEND |
|
|
|
|
SCSW_ACTL_SUSP);
|
|
|
|
} else {
|
|
|
|
if ((actl & SCSW_ACTL_SUSP) &&
|
|
|
|
(fctl & SCSW_FCTL_START_FUNC)) {
|
|
|
|
s->flags &= ~SCSW_FLAGS_MASK_PNO;
|
|
|
|
if (fctl & SCSW_FCTL_HALT_FUNC) {
|
|
|
|
s->ctrl &= ~(SCSW_ACTL_RESUME_PEND |
|
|
|
|
SCSW_ACTL_START_PEND |
|
|
|
|
SCSW_ACTL_HALT_PEND |
|
|
|
|
SCSW_ACTL_CLEAR_PEND |
|
|
|
|
SCSW_ACTL_SUSP);
|
|
|
|
} else {
|
|
|
|
s->ctrl &= ~SCSW_ACTL_RESUME_PEND;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* Clear pending sense data. */
|
|
|
|
if (p->chars & PMCW_CHARS_MASK_CSENSE) {
|
|
|
|
memset(sch->sense_data, 0 , sizeof(sch->sense_data));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = ((stctl & SCSW_STCTL_STATUS_PEND) == 0);
|
|
|
|
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void copy_crw_to_guest(CRW *dest, const CRW *src)
|
|
|
|
{
|
|
|
|
dest->flags = cpu_to_be16(src->flags);
|
|
|
|
dest->rsid = cpu_to_be16(src->rsid);
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_stcrw(CRW *crw)
|
|
|
|
{
|
|
|
|
CrwContainer *crw_cont;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
crw_cont = QTAILQ_FIRST(&channel_subsys->pending_crws);
|
|
|
|
if (crw_cont) {
|
|
|
|
QTAILQ_REMOVE(&channel_subsys->pending_crws, crw_cont, sibling);
|
|
|
|
copy_crw_to_guest(crw, &crw_cont->crw);
|
|
|
|
g_free(crw_cont);
|
|
|
|
ret = 0;
|
|
|
|
} else {
|
|
|
|
/* List was empty, turn crw machine checks on again. */
|
|
|
|
memset(crw, 0, sizeof(*crw));
|
|
|
|
channel_subsys->do_crw_mchk = true;
|
|
|
|
ret = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2013-01-28 00:59:26 +01:00
|
|
|
int css_do_tpi(IOIntCode *int_code, int lowcore)
|
2013-01-24 03:28:06 +01:00
|
|
|
{
|
|
|
|
/* No pending interrupts for !KVM. */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid,
|
|
|
|
int rfmt, void *buf)
|
|
|
|
{
|
|
|
|
int i, desc_size;
|
|
|
|
uint32_t words[8];
|
|
|
|
uint32_t chpid_type_word;
|
|
|
|
CssImage *css;
|
|
|
|
|
|
|
|
if (!m && !cssid) {
|
|
|
|
css = channel_subsys->css[channel_subsys->default_cssid];
|
|
|
|
} else {
|
|
|
|
css = channel_subsys->css[cssid];
|
|
|
|
}
|
|
|
|
if (!css) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
desc_size = 0;
|
|
|
|
for (i = f_chpid; i <= l_chpid; i++) {
|
|
|
|
if (css->chpids[i].in_use) {
|
|
|
|
chpid_type_word = 0x80000000 | (css->chpids[i].type << 8) | i;
|
|
|
|
if (rfmt == 0) {
|
|
|
|
words[0] = cpu_to_be32(chpid_type_word);
|
|
|
|
words[1] = 0;
|
|
|
|
memcpy(buf + desc_size, words, 8);
|
|
|
|
desc_size += 8;
|
|
|
|
} else if (rfmt == 1) {
|
|
|
|
words[0] = cpu_to_be32(chpid_type_word);
|
|
|
|
words[1] = 0;
|
|
|
|
words[2] = 0;
|
|
|
|
words[3] = 0;
|
|
|
|
words[4] = 0;
|
|
|
|
words[5] = 0;
|
|
|
|
words[6] = 0;
|
|
|
|
words[7] = 0;
|
|
|
|
memcpy(buf + desc_size, words, 32);
|
|
|
|
desc_size += 32;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return desc_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo)
|
|
|
|
{
|
|
|
|
/* dct is currently ignored (not really meaningful for our devices) */
|
|
|
|
/* TODO: Don't ignore mbk. */
|
|
|
|
if (update && !channel_subsys->chnmon_active) {
|
|
|
|
/* Enable measuring. */
|
|
|
|
channel_subsys->chnmon_area = mbo;
|
|
|
|
channel_subsys->chnmon_active = true;
|
|
|
|
}
|
|
|
|
if (!update && channel_subsys->chnmon_active) {
|
|
|
|
/* Disable measuring. */
|
|
|
|
channel_subsys->chnmon_area = 0;
|
|
|
|
channel_subsys->chnmon_active = false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_rsch(SubchDev *sch)
|
|
|
|
{
|
|
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
|
|
|
|
ret = -ENODEV;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->ctrl & SCSW_STCTL_STATUS_PEND) {
|
|
|
|
ret = -EINPROGRESS;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (((s->ctrl & SCSW_CTRL_MASK_FCTL) != SCSW_FCTL_START_FUNC) ||
|
|
|
|
(s->ctrl & SCSW_ACTL_RESUME_PEND) ||
|
|
|
|
(!(s->ctrl & SCSW_ACTL_SUSP))) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If monitoring is active, update counter. */
|
|
|
|
if (channel_subsys->chnmon_active) {
|
|
|
|
css_update_chnmon(sch);
|
|
|
|
}
|
|
|
|
|
|
|
|
s->ctrl |= SCSW_ACTL_RESUME_PEND;
|
|
|
|
do_subchannel_work(sch);
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_do_rchp(uint8_t cssid, uint8_t chpid)
|
|
|
|
{
|
|
|
|
uint8_t real_cssid;
|
|
|
|
|
|
|
|
if (cssid > channel_subsys->max_cssid) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (channel_subsys->max_cssid == 0) {
|
|
|
|
real_cssid = channel_subsys->default_cssid;
|
|
|
|
} else {
|
|
|
|
real_cssid = cssid;
|
|
|
|
}
|
|
|
|
if (!channel_subsys->css[real_cssid]) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!channel_subsys->css[real_cssid]->chpids[chpid].in_use) {
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!channel_subsys->css[real_cssid]->chpids[chpid].is_virtual) {
|
|
|
|
fprintf(stderr,
|
|
|
|
"rchp unsupported for non-virtual chpid %x.%02x!\n",
|
|
|
|
real_cssid, chpid);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We don't really use a channel path, so we're done here. */
|
|
|
|
css_queue_crw(CRW_RSC_CHP, CRW_ERC_INIT,
|
|
|
|
channel_subsys->max_cssid > 0 ? 1 : 0, chpid);
|
|
|
|
if (channel_subsys->max_cssid > 0) {
|
|
|
|
css_queue_crw(CRW_RSC_CHP, CRW_ERC_INIT, 0, real_cssid << 8);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool css_schid_final(uint8_t cssid, uint8_t ssid, uint16_t schid)
|
|
|
|
{
|
|
|
|
SubchSet *set;
|
|
|
|
|
|
|
|
if (cssid > MAX_CSSID || ssid > MAX_SSID || !channel_subsys->css[cssid] ||
|
|
|
|
!channel_subsys->css[cssid]->sch_set[ssid]) {
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
set = channel_subsys->css[cssid]->sch_set[ssid];
|
|
|
|
return schid > find_last_bit(set->schids_used,
|
|
|
|
(MAX_SCHID + 1) / sizeof(unsigned long));
|
|
|
|
}
|
|
|
|
|
|
|
|
static int css_add_virtual_chpid(uint8_t cssid, uint8_t chpid, uint8_t type)
|
|
|
|
{
|
|
|
|
CssImage *css;
|
|
|
|
|
|
|
|
trace_css_chpid_add(cssid, chpid, type);
|
|
|
|
if (cssid > MAX_CSSID) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
css = channel_subsys->css[cssid];
|
|
|
|
if (!css) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (css->chpids[chpid].in_use) {
|
|
|
|
return -EEXIST;
|
|
|
|
}
|
|
|
|
css->chpids[chpid].in_use = 1;
|
|
|
|
css->chpids[chpid].type = type;
|
|
|
|
css->chpids[chpid].is_virtual = 1;
|
|
|
|
|
|
|
|
css_generate_chp_crws(cssid, chpid);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void css_sch_build_virtual_schib(SubchDev *sch, uint8_t chpid, uint8_t type)
|
|
|
|
{
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
|
|
int i;
|
|
|
|
CssImage *css = channel_subsys->css[sch->cssid];
|
|
|
|
|
|
|
|
assert(css != NULL);
|
|
|
|
memset(p, 0, sizeof(PMCW));
|
|
|
|
p->flags |= PMCW_FLAGS_MASK_DNV;
|
|
|
|
p->devno = sch->devno;
|
|
|
|
/* single path */
|
|
|
|
p->pim = 0x80;
|
|
|
|
p->pom = 0xff;
|
|
|
|
p->pam = 0x80;
|
|
|
|
p->chpid[0] = chpid;
|
|
|
|
if (!css->chpids[chpid].in_use) {
|
|
|
|
css_add_virtual_chpid(sch->cssid, chpid, type);
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(s, 0, sizeof(SCSW));
|
|
|
|
sch->curr_status.mba = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sch->curr_status.mda); i++) {
|
|
|
|
sch->curr_status.mda[i] = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid, uint16_t schid)
|
|
|
|
{
|
|
|
|
uint8_t real_cssid;
|
|
|
|
|
|
|
|
real_cssid = (!m && (cssid == 0)) ? channel_subsys->default_cssid : cssid;
|
|
|
|
|
|
|
|
if (!channel_subsys->css[real_cssid]) {
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!channel_subsys->css[real_cssid]->sch_set[ssid]) {
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return channel_subsys->css[real_cssid]->sch_set[ssid]->sch[schid];
|
|
|
|
}
|
|
|
|
|
|
|
|
bool css_subch_visible(SubchDev *sch)
|
|
|
|
{
|
|
|
|
if (sch->ssid > channel_subsys->max_ssid) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (sch->cssid != channel_subsys->default_cssid) {
|
|
|
|
return (channel_subsys->max_cssid > 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool css_present(uint8_t cssid)
|
|
|
|
{
|
|
|
|
return (channel_subsys->css[cssid] != NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
bool css_devno_used(uint8_t cssid, uint8_t ssid, uint16_t devno)
|
|
|
|
{
|
|
|
|
if (!channel_subsys->css[cssid]) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
if (!channel_subsys->css[cssid]->sch_set[ssid]) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
return !!test_bit(devno,
|
|
|
|
channel_subsys->css[cssid]->sch_set[ssid]->devnos_used);
|
|
|
|
}
|
|
|
|
|
|
|
|
void css_subch_assign(uint8_t cssid, uint8_t ssid, uint16_t schid,
|
|
|
|
uint16_t devno, SubchDev *sch)
|
|
|
|
{
|
|
|
|
CssImage *css;
|
|
|
|
SubchSet *s_set;
|
|
|
|
|
|
|
|
trace_css_assign_subch(sch ? "assign" : "deassign", cssid, ssid, schid,
|
|
|
|
devno);
|
|
|
|
if (!channel_subsys->css[cssid]) {
|
|
|
|
fprintf(stderr,
|
|
|
|
"Suspicious call to %s (%x.%x.%04x) for non-existing css!\n",
|
|
|
|
__func__, cssid, ssid, schid);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
css = channel_subsys->css[cssid];
|
|
|
|
|
|
|
|
if (!css->sch_set[ssid]) {
|
|
|
|
css->sch_set[ssid] = g_malloc0(sizeof(SubchSet));
|
|
|
|
}
|
|
|
|
s_set = css->sch_set[ssid];
|
|
|
|
|
|
|
|
s_set->sch[schid] = sch;
|
|
|
|
if (sch) {
|
|
|
|
set_bit(schid, s_set->schids_used);
|
|
|
|
set_bit(devno, s_set->devnos_used);
|
|
|
|
} else {
|
|
|
|
clear_bit(schid, s_set->schids_used);
|
|
|
|
clear_bit(devno, s_set->devnos_used);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void css_queue_crw(uint8_t rsc, uint8_t erc, int chain, uint16_t rsid)
|
|
|
|
{
|
|
|
|
CrwContainer *crw_cont;
|
|
|
|
|
|
|
|
trace_css_crw(rsc, erc, rsid, chain ? "(chained)" : "");
|
|
|
|
/* TODO: Maybe use a static crw pool? */
|
|
|
|
crw_cont = g_try_malloc0(sizeof(CrwContainer));
|
|
|
|
if (!crw_cont) {
|
|
|
|
channel_subsys->crws_lost = true;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
crw_cont->crw.flags = (rsc << 8) | erc;
|
|
|
|
if (chain) {
|
|
|
|
crw_cont->crw.flags |= CRW_FLAGS_MASK_C;
|
|
|
|
}
|
|
|
|
crw_cont->crw.rsid = rsid;
|
|
|
|
if (channel_subsys->crws_lost) {
|
|
|
|
crw_cont->crw.flags |= CRW_FLAGS_MASK_R;
|
|
|
|
channel_subsys->crws_lost = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
QTAILQ_INSERT_TAIL(&channel_subsys->pending_crws, crw_cont, sibling);
|
|
|
|
|
|
|
|
if (channel_subsys->do_crw_mchk) {
|
|
|
|
S390CPU *cpu = s390_cpu_addr2state(0);
|
|
|
|
|
|
|
|
channel_subsys->do_crw_mchk = false;
|
|
|
|
/* Inject crw pending machine check. */
|
|
|
|
s390_crw_mchk(cpu);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,
|
|
|
|
int hotplugged, int add)
|
|
|
|
{
|
|
|
|
uint8_t guest_cssid;
|
|
|
|
bool chain_crw;
|
|
|
|
|
|
|
|
if (add && !hotplugged) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (channel_subsys->max_cssid == 0) {
|
|
|
|
/* Default cssid shows up as 0. */
|
|
|
|
guest_cssid = (cssid == channel_subsys->default_cssid) ? 0 : cssid;
|
|
|
|
} else {
|
|
|
|
/* Show real cssid to the guest. */
|
|
|
|
guest_cssid = cssid;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Only notify for higher subchannel sets/channel subsystems if the
|
|
|
|
* guest has enabled it.
|
|
|
|
*/
|
|
|
|
if ((ssid > channel_subsys->max_ssid) ||
|
|
|
|
(guest_cssid > channel_subsys->max_cssid) ||
|
|
|
|
((channel_subsys->max_cssid == 0) &&
|
|
|
|
(cssid != channel_subsys->default_cssid))) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
chain_crw = (channel_subsys->max_ssid > 0) ||
|
|
|
|
(channel_subsys->max_cssid > 0);
|
|
|
|
css_queue_crw(CRW_RSC_SUBCH, CRW_ERC_IPI, chain_crw ? 1 : 0, schid);
|
|
|
|
if (chain_crw) {
|
|
|
|
css_queue_crw(CRW_RSC_SUBCH, CRW_ERC_IPI, 0,
|
|
|
|
(guest_cssid << 8) | (ssid << 4));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void css_generate_chp_crws(uint8_t cssid, uint8_t chpid)
|
|
|
|
{
|
|
|
|
/* TODO */
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_enable_mcsse(void)
|
|
|
|
{
|
|
|
|
trace_css_enable_facility("mcsse");
|
|
|
|
channel_subsys->max_cssid = MAX_CSSID;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int css_enable_mss(void)
|
|
|
|
{
|
|
|
|
trace_css_enable_facility("mss");
|
|
|
|
channel_subsys->max_ssid = MAX_SSID;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void css_init(void)
|
|
|
|
{
|
|
|
|
channel_subsys = g_malloc0(sizeof(*channel_subsys));
|
|
|
|
QTAILQ_INIT(&channel_subsys->pending_crws);
|
|
|
|
channel_subsys->do_crw_mchk = true;
|
|
|
|
channel_subsys->crws_lost = false;
|
|
|
|
channel_subsys->chnmon_active = false;
|
|
|
|
}
|
|
|
|
machine_init(css_init);
|
|
|
|
|
|
|
|
void css_reset_sch(SubchDev *sch)
|
|
|
|
{
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
|
|
|
|
p->intparm = 0;
|
|
|
|
p->flags &= ~(PMCW_FLAGS_MASK_ISC | PMCW_FLAGS_MASK_ENA |
|
|
|
|
PMCW_FLAGS_MASK_LM | PMCW_FLAGS_MASK_MME |
|
|
|
|
PMCW_FLAGS_MASK_MP | PMCW_FLAGS_MASK_TF);
|
|
|
|
p->flags |= PMCW_FLAGS_MASK_DNV;
|
|
|
|
p->devno = sch->devno;
|
|
|
|
p->pim = 0x80;
|
|
|
|
p->lpm = p->pim;
|
|
|
|
p->pnom = 0;
|
|
|
|
p->lpum = 0;
|
|
|
|
p->mbi = 0;
|
|
|
|
p->pom = 0xff;
|
|
|
|
p->pam = 0x80;
|
|
|
|
p->chars &= ~(PMCW_CHARS_MASK_MBFC | PMCW_CHARS_MASK_XMWME |
|
|
|
|
PMCW_CHARS_MASK_CSENSE);
|
|
|
|
|
|
|
|
memset(&sch->curr_status.scsw, 0, sizeof(sch->curr_status.scsw));
|
|
|
|
sch->curr_status.mba = 0;
|
|
|
|
|
|
|
|
sch->channel_prog = 0x0;
|
|
|
|
sch->last_cmd_valid = false;
|
|
|
|
sch->orb = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
void css_reset(void)
|
|
|
|
{
|
|
|
|
CrwContainer *crw_cont;
|
|
|
|
|
|
|
|
/* Clean up monitoring. */
|
|
|
|
channel_subsys->chnmon_active = false;
|
|
|
|
channel_subsys->chnmon_area = 0;
|
|
|
|
|
|
|
|
/* Clear pending CRWs. */
|
|
|
|
while ((crw_cont = QTAILQ_FIRST(&channel_subsys->pending_crws))) {
|
|
|
|
QTAILQ_REMOVE(&channel_subsys->pending_crws, crw_cont, sibling);
|
|
|
|
g_free(crw_cont);
|
|
|
|
}
|
|
|
|
channel_subsys->do_crw_mchk = true;
|
|
|
|
channel_subsys->crws_lost = false;
|
|
|
|
|
|
|
|
/* Reset maximum ids. */
|
|
|
|
channel_subsys->max_cssid = 0;
|
|
|
|
channel_subsys->max_ssid = 0;
|
|
|
|
}
|