mirror of https://github.com/proxmox/mirror_qemu
1908 lines
54 KiB
C
1908 lines
54 KiB
C
/*
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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 "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qapi/visitor.h"
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#include "hw/qdev.h"
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#include "qemu/bitops.h"
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#include "exec/address-spaces.h"
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#include "cpu.h"
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#include "hw/s390x/ioinst.h"
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#include "hw/s390x/css.h"
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#include "trace.h"
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#include "hw/s390x/s390_flic.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 IoAdapter {
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uint32_t id;
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uint8_t type;
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uint8_t isc;
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QTAILQ_ENTRY(IoAdapter) sibling;
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} IoAdapter;
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typedef struct ChannelSubSys {
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QTAILQ_HEAD(, CrwContainer) pending_crws;
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bool sei_pending;
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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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QTAILQ_HEAD(, IoAdapter) io_adapters;
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QTAILQ_HEAD(, IndAddr) indicator_addresses;
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} ChannelSubSys;
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static ChannelSubSys channel_subsys = {
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.pending_crws = QTAILQ_HEAD_INITIALIZER(channel_subsys.pending_crws),
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.do_crw_mchk = true,
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.sei_pending = false,
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.do_crw_mchk = true,
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.crws_lost = false,
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.chnmon_active = false,
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.io_adapters = QTAILQ_HEAD_INITIALIZER(channel_subsys.io_adapters),
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.indicator_addresses =
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QTAILQ_HEAD_INITIALIZER(channel_subsys.indicator_addresses),
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};
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IndAddr *get_indicator(hwaddr ind_addr, int len)
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{
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IndAddr *indicator;
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QTAILQ_FOREACH(indicator, &channel_subsys.indicator_addresses, sibling) {
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if (indicator->addr == ind_addr) {
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indicator->refcnt++;
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return indicator;
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}
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}
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indicator = g_new0(IndAddr, 1);
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indicator->addr = ind_addr;
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indicator->len = len;
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indicator->refcnt = 1;
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QTAILQ_INSERT_TAIL(&channel_subsys.indicator_addresses,
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indicator, sibling);
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return indicator;
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}
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static int s390_io_adapter_map(AdapterInfo *adapter, uint64_t map_addr,
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bool do_map)
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{
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S390FLICState *fs = s390_get_flic();
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S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
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return fsc->io_adapter_map(fs, adapter->adapter_id, map_addr, do_map);
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}
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void release_indicator(AdapterInfo *adapter, IndAddr *indicator)
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{
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assert(indicator->refcnt > 0);
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indicator->refcnt--;
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if (indicator->refcnt > 0) {
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return;
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}
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QTAILQ_REMOVE(&channel_subsys.indicator_addresses, indicator, sibling);
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if (indicator->map) {
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s390_io_adapter_map(adapter, indicator->map, false);
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}
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g_free(indicator);
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}
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int map_indicator(AdapterInfo *adapter, IndAddr *indicator)
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{
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int ret;
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if (indicator->map) {
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return 0; /* already mapped is not an error */
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}
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indicator->map = indicator->addr;
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ret = s390_io_adapter_map(adapter, indicator->map, true);
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if ((ret != 0) && (ret != -ENOSYS)) {
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goto out_err;
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}
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return 0;
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out_err:
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indicator->map = 0;
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return ret;
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}
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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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int css_register_io_adapter(uint8_t type, uint8_t isc, bool swap,
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bool maskable, uint32_t *id)
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{
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IoAdapter *adapter;
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bool found = false;
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int ret;
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S390FLICState *fs = s390_get_flic();
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S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
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*id = 0;
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QTAILQ_FOREACH(adapter, &channel_subsys.io_adapters, sibling) {
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if ((adapter->type == type) && (adapter->isc == isc)) {
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*id = adapter->id;
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found = true;
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ret = 0;
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break;
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}
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if (adapter->id >= *id) {
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*id = adapter->id + 1;
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}
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}
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if (found) {
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goto out;
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}
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adapter = g_new0(IoAdapter, 1);
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ret = fsc->register_io_adapter(fs, *id, isc, swap, maskable);
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if (ret == 0) {
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adapter->id = *id;
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adapter->isc = isc;
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adapter->type = type;
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QTAILQ_INSERT_TAIL(&channel_subsys.io_adapters, adapter, sibling);
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} else {
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g_free(adapter);
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fprintf(stderr, "Unexpected error %d when registering adapter %d\n",
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ret, *id);
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}
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out:
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return ret;
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}
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static void css_clear_io_interrupt(uint16_t subchannel_id,
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uint16_t subchannel_nr)
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{
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Error *err = NULL;
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static bool no_clear_irq;
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S390FLICState *fs = s390_get_flic();
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S390FLICStateClass *fsc = S390_FLIC_COMMON_GET_CLASS(fs);
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int r;
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if (unlikely(no_clear_irq)) {
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return;
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}
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r = fsc->clear_io_irq(fs, subchannel_id, subchannel_nr);
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switch (r) {
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case 0:
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break;
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case -ENOSYS:
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no_clear_irq = true;
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/*
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* Ignore unavailability, as the user can't do anything
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* about it anyway.
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*/
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break;
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default:
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error_setg_errno(&err, -r, "unexpected error condition");
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error_propagate(&error_abort, err);
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}
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}
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static inline uint16_t css_do_build_subchannel_id(uint8_t cssid, uint8_t ssid)
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{
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if (channel_subsys.max_cssid > 0) {
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return (cssid << 8) | (1 << 3) | (ssid << 1) | 1;
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}
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return (ssid << 1) | 1;
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}
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uint16_t css_build_subchannel_id(SubchDev *sch)
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{
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return css_do_build_subchannel_id(sch->cssid, sch->ssid);
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}
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static void css_inject_io_interrupt(SubchDev *sch)
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{
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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(css_build_subchannel_id(sch),
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sch->schid,
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sch->curr_status.pmcw.intparm,
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isc << 27);
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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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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(css_build_subchannel_id(sch),
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sch->schid,
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sch->curr_status.pmcw.intparm,
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isc << 27);
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}
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}
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void css_adapter_interrupt(uint8_t isc)
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{
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uint32_t io_int_word = (isc << 27) | IO_INT_WORD_AI;
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trace_css_adapter_interrupt(isc);
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s390_io_interrupt(0, 0, 0, io_int_word);
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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 'issuing 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->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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hwaddr curr_ccw = sch->channel_prog;
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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->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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if ((s->ctrl & (SCSW_ACTL_SUBCH_ACTIVE | SCSW_ACTL_DEVICE_ACTIVE)) ||
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(s->ctrl & SCSW_ACTL_SUSP)) {
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s->cpa = curr_ccw + 8;
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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, bool fmt1)
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{
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CCW0 tmp0;
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CCW1 tmp1;
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CCW1 ret;
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if (fmt1) {
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cpu_physical_memory_read(addr, &tmp1, sizeof(tmp1));
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ret.cmd_code = tmp1.cmd_code;
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ret.flags = tmp1.flags;
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ret.count = be16_to_cpu(tmp1.count);
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ret.cda = be32_to_cpu(tmp1.cda);
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} else {
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cpu_physical_memory_read(addr, &tmp0, sizeof(tmp0));
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ret.cmd_code = tmp0.cmd_code;
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ret.flags = tmp0.flags;
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ret.count = be16_to_cpu(tmp0.count);
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ret.cda = be16_to_cpu(tmp0.cda1) | (tmp0.cda0 << 16);
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if ((ret.cmd_code & 0x0f) == CCW_CMD_TIC) {
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ret.cmd_code &= 0x0f;
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}
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}
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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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bool suspend_allowed)
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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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/* Translate everything to format-1 ccws - the information is the same. */
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ccw = copy_ccw_from_guest(ccw_addr, sch->ccw_fmt_1);
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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 (!sch->ccw_fmt_1 && (ccw.count == 0) &&
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(ccw.cmd_code != CCW_CMD_TIC)) {
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return -EINVAL;
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}
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if (ccw.flags & CCW_FLAG_SUSPEND) {
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return suspend_allowed ? -EINPROGRESS : -EINVAL;
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}
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check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
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if (!ccw.cda) {
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if (sch->ccw_no_data_cnt == 255) {
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return -EINVAL;
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}
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sch->ccw_no_data_cnt++;
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}
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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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ret = -ENOSYS;
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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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|
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return ret;
|
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}
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|
|
static void sch_handle_start_func(SubchDev *sch, ORB *orb)
|
|
{
|
|
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
int path;
|
|
int ret;
|
|
bool suspend_allowed;
|
|
|
|
/* Path management: In our simple css, we always choose the only path. */
|
|
path = 0x80;
|
|
|
|
if (!(s->ctrl & SCSW_ACTL_SUSP)) {
|
|
s->cstat = 0;
|
|
s->dstat = 0;
|
|
/* Look at the orb and try to execute the channel program. */
|
|
assert(orb != NULL); /* resume does not pass an orb */
|
|
p->intparm = orb->intparm;
|
|
if (!(orb->lpm & path)) {
|
|
/* Generate a deferred cc 3 condition. */
|
|
s->flags |= SCSW_FLAGS_MASK_CC;
|
|
s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
|
|
s->ctrl |= (SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND);
|
|
return;
|
|
}
|
|
sch->ccw_fmt_1 = !!(orb->ctrl0 & ORB_CTRL0_MASK_FMT);
|
|
sch->ccw_no_data_cnt = 0;
|
|
suspend_allowed = !!(orb->ctrl0 & ORB_CTRL0_MASK_SPND);
|
|
} else {
|
|
s->ctrl &= ~(SCSW_ACTL_SUSP | SCSW_ACTL_RESUME_PEND);
|
|
/* The channel program had been suspended before. */
|
|
suspend_allowed = true;
|
|
}
|
|
sch->last_cmd_valid = false;
|
|
do {
|
|
ret = css_interpret_ccw(sch, sch->channel_prog, suspend_allowed);
|
|
switch (ret) {
|
|
case -EAGAIN:
|
|
/* ccw chain, continue processing */
|
|
break;
|
|
case 0:
|
|
/* success */
|
|
s->ctrl &= ~SCSW_ACTL_START_PEND;
|
|
s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
|
|
s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
|
|
SCSW_STCTL_STATUS_PEND;
|
|
s->dstat = SCSW_DSTAT_CHANNEL_END | SCSW_DSTAT_DEVICE_END;
|
|
s->cpa = sch->channel_prog + 8;
|
|
break;
|
|
case -ENOSYS:
|
|
/* unsupported command, generate unit check (command reject) */
|
|
s->ctrl &= ~SCSW_ACTL_START_PEND;
|
|
s->dstat = SCSW_DSTAT_UNIT_CHECK;
|
|
/* Set sense bit 0 in ecw0. */
|
|
sch->sense_data[0] = 0x80;
|
|
s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
|
|
s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
|
|
SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
|
|
s->cpa = sch->channel_prog + 8;
|
|
break;
|
|
case -EFAULT:
|
|
/* 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;
|
|
s->cpa = sch->channel_prog + 8;
|
|
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;
|
|
case -EINPROGRESS:
|
|
/* 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;
|
|
s->cpa = sch->channel_prog + 8;
|
|
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, ORB *orb)
|
|
{
|
|
|
|
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, orb);
|
|
} 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, const SCHIB *orig_schib)
|
|
{
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
uint16_t oldflags;
|
|
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;
|
|
oldflags = p->flags;
|
|
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;
|
|
|
|
/* Has the channel been disabled? */
|
|
if (sch->disable_cb && (oldflags & PMCW_FLAGS_MASK_ENA) != 0
|
|
&& (p->flags & PMCW_FLAGS_MASK_ENA) == 0) {
|
|
sch->disable_cb(sch);
|
|
}
|
|
|
|
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;
|
|
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_ACTL_CLEAR_PEND;
|
|
|
|
do_subchannel_work(sch, NULL);
|
|
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, NULL);
|
|
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 = address_space_ldl(&address_space_memory,
|
|
sch->curr_status.mba,
|
|
MEMTXATTRS_UNSPECIFIED,
|
|
NULL);
|
|
count++;
|
|
address_space_stl(&address_space_memory, sch->curr_status.mba, count,
|
|
MEMTXATTRS_UNSPECIFIED, NULL);
|
|
} else {
|
|
/* Format 0, global area. */
|
|
uint32_t offset;
|
|
uint16_t count;
|
|
|
|
offset = sch->curr_status.pmcw.mbi << 5;
|
|
count = address_space_lduw(&address_space_memory,
|
|
channel_subsys.chnmon_area + offset,
|
|
MEMTXATTRS_UNSPECIFIED,
|
|
NULL);
|
|
count++;
|
|
address_space_stw(&address_space_memory,
|
|
channel_subsys.chnmon_area + offset, count,
|
|
MEMTXATTRS_UNSPECIFIED, NULL);
|
|
}
|
|
}
|
|
|
|
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->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, orb);
|
|
ret = 0;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void copy_irb_to_guest(IRB *dest, const IRB *src, PMCW *pmcw,
|
|
int *irb_len)
|
|
{
|
|
int i;
|
|
uint16_t stctl = src->scsw.ctrl & SCSW_CTRL_MASK_STCTL;
|
|
uint16_t actl = src->scsw.ctrl & SCSW_CTRL_MASK_ACTL;
|
|
|
|
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]);
|
|
}
|
|
*irb_len = sizeof(*dest) - sizeof(dest->emw);
|
|
|
|
/* extended measurements enabled? */
|
|
if ((src->scsw.flags & SCSW_FLAGS_MASK_ESWF) ||
|
|
!(pmcw->flags & PMCW_FLAGS_MASK_TF) ||
|
|
!(pmcw->chars & PMCW_CHARS_MASK_XMWME)) {
|
|
return;
|
|
}
|
|
/* extended measurements pending? */
|
|
if (!(stctl & SCSW_STCTL_STATUS_PEND)) {
|
|
return;
|
|
}
|
|
if ((stctl & SCSW_STCTL_PRIMARY) ||
|
|
(stctl == SCSW_STCTL_SECONDARY) ||
|
|
((stctl & SCSW_STCTL_INTERMEDIATE) && (actl & SCSW_ACTL_SUSP))) {
|
|
for (i = 0; i < ARRAY_SIZE(dest->emw); i++) {
|
|
dest->emw[i] = cpu_to_be32(src->emw[i]);
|
|
}
|
|
}
|
|
*irb_len = sizeof(*dest);
|
|
}
|
|
|
|
int css_do_tsch_get_irb(SubchDev *sch, IRB *target_irb, int *irb_len)
|
|
{
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
uint16_t stctl;
|
|
IRB irb;
|
|
|
|
if (!(p->flags & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA))) {
|
|
return 3;
|
|
}
|
|
|
|
stctl = s->ctrl & SCSW_CTRL_MASK_STCTL;
|
|
|
|
/* 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)) {
|
|
int i;
|
|
|
|
irb.scsw.flags |= SCSW_FLAGS_MASK_ESWF | SCSW_FLAGS_MASK_ECTL;
|
|
/* Attention: sense_data is already BE! */
|
|
memcpy(irb.ecw, sch->sense_data, sizeof(sch->sense_data));
|
|
for (i = 0; i < ARRAY_SIZE(irb.ecw); i++) {
|
|
irb.ecw[i] = be32_to_cpu(irb.ecw[i]);
|
|
}
|
|
irb.esw[1] = 0x01000000 | (sizeof(sch->sense_data) << 8);
|
|
}
|
|
}
|
|
/* Store the irb to the guest. */
|
|
copy_irb_to_guest(target_irb, &irb, p, irb_len);
|
|
|
|
return ((stctl & SCSW_STCTL_STATUS_PEND) == 0);
|
|
}
|
|
|
|
void css_do_tsch_update_subch(SubchDev *sch)
|
|
{
|
|
SCSW *s = &sch->curr_status.scsw;
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
uint16_t stctl;
|
|
uint16_t fctl;
|
|
uint16_t actl;
|
|
|
|
stctl = s->ctrl & SCSW_CTRL_MASK_STCTL;
|
|
fctl = s->ctrl & SCSW_CTRL_MASK_FCTL;
|
|
actl = s->ctrl & SCSW_CTRL_MASK_ACTL;
|
|
|
|
/* 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));
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static void copy_crw_from_guest(CRW *dest, const CRW *src)
|
|
{
|
|
dest->flags = be16_to_cpu(src->flags);
|
|
dest->rsid = be16_to_cpu(src->rsid);
|
|
}
|
|
|
|
void css_undo_stcrw(CRW *crw)
|
|
{
|
|
CrwContainer *crw_cont;
|
|
|
|
crw_cont = g_try_malloc0(sizeof(CrwContainer));
|
|
if (!crw_cont) {
|
|
channel_subsys.crws_lost = true;
|
|
return;
|
|
}
|
|
copy_crw_from_guest(&crw_cont->crw, crw);
|
|
|
|
QTAILQ_INSERT_HEAD(&channel_subsys.pending_crws, crw_cont, sibling);
|
|
}
|
|
|
|
int css_do_tpi(IOIntCode *int_code, int lowcore)
|
|
{
|
|
/* 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, NULL);
|
|
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(int m, uint8_t cssid, uint8_t ssid, uint16_t schid)
|
|
{
|
|
SubchSet *set;
|
|
uint8_t real_cssid;
|
|
|
|
real_cssid = (!m && (cssid == 0)) ? channel_subsys.default_cssid : cssid;
|
|
if (real_cssid > MAX_CSSID || ssid > MAX_SSID ||
|
|
!channel_subsys.css[real_cssid] ||
|
|
!channel_subsys.css[real_cssid]->sch_set[ssid]) {
|
|
return true;
|
|
}
|
|
set = channel_subsys.css[real_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];
|
|
}
|
|
|
|
/**
|
|
* Return free device number in subchannel set.
|
|
*
|
|
* Return index of the first free device number in the subchannel set
|
|
* identified by @p cssid and @p ssid, beginning the search at @p
|
|
* start and wrapping around at MAX_DEVNO. Return a value exceeding
|
|
* MAX_SCHID if there are no free device numbers in the subchannel
|
|
* set.
|
|
*/
|
|
static uint32_t css_find_free_devno(uint8_t cssid, uint8_t ssid,
|
|
uint16_t start)
|
|
{
|
|
uint32_t round;
|
|
|
|
for (round = 0; round <= MAX_DEVNO; round++) {
|
|
uint16_t devno = (start + round) % MAX_DEVNO;
|
|
|
|
if (!css_devno_used(cssid, ssid, devno)) {
|
|
return devno;
|
|
}
|
|
}
|
|
return MAX_DEVNO + 1;
|
|
}
|
|
|
|
/**
|
|
* Return first free subchannel (id) in subchannel set.
|
|
*
|
|
* Return index of the first free subchannel in the subchannel set
|
|
* identified by @p cssid and @p ssid, if there is any. Return a value
|
|
* exceeding MAX_SCHID if there are no free subchannels in the
|
|
* subchannel set.
|
|
*/
|
|
static uint32_t css_find_free_subch(uint8_t cssid, uint8_t ssid)
|
|
{
|
|
uint32_t schid;
|
|
|
|
for (schid = 0; schid <= MAX_SCHID; schid++) {
|
|
if (!css_find_subch(1, cssid, ssid, schid)) {
|
|
return schid;
|
|
}
|
|
}
|
|
return MAX_SCHID + 1;
|
|
}
|
|
|
|
/**
|
|
* Return first free subchannel (id) in subchannel set for a device number
|
|
*
|
|
* Verify the device number @p devno is not used yet in the subchannel
|
|
* set identified by @p cssid and @p ssid. Set @p schid to the index
|
|
* of the first free subchannel in the subchannel set, if there is
|
|
* any. Return true if everything succeeded and false otherwise.
|
|
*/
|
|
static bool css_find_free_subch_for_devno(uint8_t cssid, uint8_t ssid,
|
|
uint16_t devno, uint16_t *schid,
|
|
Error **errp)
|
|
{
|
|
uint32_t free_schid;
|
|
|
|
assert(schid);
|
|
if (css_devno_used(cssid, ssid, devno)) {
|
|
error_setg(errp, "Device %x.%x.%04x already exists",
|
|
cssid, ssid, devno);
|
|
return false;
|
|
}
|
|
free_schid = css_find_free_subch(cssid, ssid);
|
|
if (free_schid > MAX_SCHID) {
|
|
error_setg(errp, "No free subchannel found for %x.%x.%04x",
|
|
cssid, ssid, devno);
|
|
return false;
|
|
}
|
|
*schid = free_schid;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Return first free subchannel (id) and device number
|
|
*
|
|
* Locate the first free subchannel and first free device number in
|
|
* any of the subchannel sets of the channel subsystem identified by
|
|
* @p cssid. Return false if no free subchannel / device number could
|
|
* be found. Otherwise set @p ssid, @p devno and @p schid to identify
|
|
* the available subchannel and device number and return true.
|
|
*
|
|
* May modify @p ssid, @p devno and / or @p schid even if no free
|
|
* subchannel / device number could be found.
|
|
*/
|
|
static bool css_find_free_subch_and_devno(uint8_t cssid, uint8_t *ssid,
|
|
uint16_t *devno, uint16_t *schid,
|
|
Error **errp)
|
|
{
|
|
uint32_t free_schid, free_devno;
|
|
|
|
assert(ssid && devno && schid);
|
|
for (*ssid = 0; *ssid <= MAX_SSID; (*ssid)++) {
|
|
free_schid = css_find_free_subch(cssid, *ssid);
|
|
if (free_schid > MAX_SCHID) {
|
|
continue;
|
|
}
|
|
free_devno = css_find_free_devno(cssid, *ssid, free_schid);
|
|
if (free_devno > MAX_DEVNO) {
|
|
continue;
|
|
}
|
|
*schid = free_schid;
|
|
*devno = free_devno;
|
|
return true;
|
|
}
|
|
error_setg(errp, "Virtual channel subsystem is full!");
|
|
return false;
|
|
}
|
|
|
|
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) {
|
|
channel_subsys.do_crw_mchk = false;
|
|
/* Inject crw pending machine check. */
|
|
s390_crw_mchk();
|
|
}
|
|
}
|
|
|
|
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));
|
|
}
|
|
/* RW_ERC_IPI --> clear pending interrupts */
|
|
css_clear_io_interrupt(css_do_build_subchannel_id(cssid, ssid), schid);
|
|
}
|
|
|
|
void css_generate_chp_crws(uint8_t cssid, uint8_t chpid)
|
|
{
|
|
/* TODO */
|
|
}
|
|
|
|
void css_generate_css_crws(uint8_t cssid)
|
|
{
|
|
if (!channel_subsys.sei_pending) {
|
|
css_queue_crw(CRW_RSC_CSS, 0, 0, cssid);
|
|
}
|
|
channel_subsys.sei_pending = true;
|
|
}
|
|
|
|
void css_clear_sei_pending(void)
|
|
{
|
|
channel_subsys.sei_pending = false;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
void subch_device_save(SubchDev *s, QEMUFile *f)
|
|
{
|
|
int i;
|
|
|
|
qemu_put_byte(f, s->cssid);
|
|
qemu_put_byte(f, s->ssid);
|
|
qemu_put_be16(f, s->schid);
|
|
qemu_put_be16(f, s->devno);
|
|
qemu_put_byte(f, s->thinint_active);
|
|
/* SCHIB */
|
|
/* PMCW */
|
|
qemu_put_be32(f, s->curr_status.pmcw.intparm);
|
|
qemu_put_be16(f, s->curr_status.pmcw.flags);
|
|
qemu_put_be16(f, s->curr_status.pmcw.devno);
|
|
qemu_put_byte(f, s->curr_status.pmcw.lpm);
|
|
qemu_put_byte(f, s->curr_status.pmcw.pnom);
|
|
qemu_put_byte(f, s->curr_status.pmcw.lpum);
|
|
qemu_put_byte(f, s->curr_status.pmcw.pim);
|
|
qemu_put_be16(f, s->curr_status.pmcw.mbi);
|
|
qemu_put_byte(f, s->curr_status.pmcw.pom);
|
|
qemu_put_byte(f, s->curr_status.pmcw.pam);
|
|
qemu_put_buffer(f, s->curr_status.pmcw.chpid, 8);
|
|
qemu_put_be32(f, s->curr_status.pmcw.chars);
|
|
/* SCSW */
|
|
qemu_put_be16(f, s->curr_status.scsw.flags);
|
|
qemu_put_be16(f, s->curr_status.scsw.ctrl);
|
|
qemu_put_be32(f, s->curr_status.scsw.cpa);
|
|
qemu_put_byte(f, s->curr_status.scsw.dstat);
|
|
qemu_put_byte(f, s->curr_status.scsw.cstat);
|
|
qemu_put_be16(f, s->curr_status.scsw.count);
|
|
qemu_put_be64(f, s->curr_status.mba);
|
|
qemu_put_buffer(f, s->curr_status.mda, 4);
|
|
/* end SCHIB */
|
|
qemu_put_buffer(f, s->sense_data, 32);
|
|
qemu_put_be64(f, s->channel_prog);
|
|
/* last cmd */
|
|
qemu_put_byte(f, s->last_cmd.cmd_code);
|
|
qemu_put_byte(f, s->last_cmd.flags);
|
|
qemu_put_be16(f, s->last_cmd.count);
|
|
qemu_put_be32(f, s->last_cmd.cda);
|
|
qemu_put_byte(f, s->last_cmd_valid);
|
|
qemu_put_byte(f, s->id.reserved);
|
|
qemu_put_be16(f, s->id.cu_type);
|
|
qemu_put_byte(f, s->id.cu_model);
|
|
qemu_put_be16(f, s->id.dev_type);
|
|
qemu_put_byte(f, s->id.dev_model);
|
|
qemu_put_byte(f, s->id.unused);
|
|
for (i = 0; i < ARRAY_SIZE(s->id.ciw); i++) {
|
|
qemu_put_byte(f, s->id.ciw[i].type);
|
|
qemu_put_byte(f, s->id.ciw[i].command);
|
|
qemu_put_be16(f, s->id.ciw[i].count);
|
|
}
|
|
qemu_put_byte(f, s->ccw_fmt_1);
|
|
qemu_put_byte(f, s->ccw_no_data_cnt);
|
|
}
|
|
|
|
int subch_device_load(SubchDev *s, QEMUFile *f)
|
|
{
|
|
int i;
|
|
|
|
s->cssid = qemu_get_byte(f);
|
|
s->ssid = qemu_get_byte(f);
|
|
s->schid = qemu_get_be16(f);
|
|
s->devno = qemu_get_be16(f);
|
|
s->thinint_active = qemu_get_byte(f);
|
|
/* SCHIB */
|
|
/* PMCW */
|
|
s->curr_status.pmcw.intparm = qemu_get_be32(f);
|
|
s->curr_status.pmcw.flags = qemu_get_be16(f);
|
|
s->curr_status.pmcw.devno = qemu_get_be16(f);
|
|
s->curr_status.pmcw.lpm = qemu_get_byte(f);
|
|
s->curr_status.pmcw.pnom = qemu_get_byte(f);
|
|
s->curr_status.pmcw.lpum = qemu_get_byte(f);
|
|
s->curr_status.pmcw.pim = qemu_get_byte(f);
|
|
s->curr_status.pmcw.mbi = qemu_get_be16(f);
|
|
s->curr_status.pmcw.pom = qemu_get_byte(f);
|
|
s->curr_status.pmcw.pam = qemu_get_byte(f);
|
|
qemu_get_buffer(f, s->curr_status.pmcw.chpid, 8);
|
|
s->curr_status.pmcw.chars = qemu_get_be32(f);
|
|
/* SCSW */
|
|
s->curr_status.scsw.flags = qemu_get_be16(f);
|
|
s->curr_status.scsw.ctrl = qemu_get_be16(f);
|
|
s->curr_status.scsw.cpa = qemu_get_be32(f);
|
|
s->curr_status.scsw.dstat = qemu_get_byte(f);
|
|
s->curr_status.scsw.cstat = qemu_get_byte(f);
|
|
s->curr_status.scsw.count = qemu_get_be16(f);
|
|
s->curr_status.mba = qemu_get_be64(f);
|
|
qemu_get_buffer(f, s->curr_status.mda, 4);
|
|
/* end SCHIB */
|
|
qemu_get_buffer(f, s->sense_data, 32);
|
|
s->channel_prog = qemu_get_be64(f);
|
|
/* last cmd */
|
|
s->last_cmd.cmd_code = qemu_get_byte(f);
|
|
s->last_cmd.flags = qemu_get_byte(f);
|
|
s->last_cmd.count = qemu_get_be16(f);
|
|
s->last_cmd.cda = qemu_get_be32(f);
|
|
s->last_cmd_valid = qemu_get_byte(f);
|
|
s->id.reserved = qemu_get_byte(f);
|
|
s->id.cu_type = qemu_get_be16(f);
|
|
s->id.cu_model = qemu_get_byte(f);
|
|
s->id.dev_type = qemu_get_be16(f);
|
|
s->id.dev_model = qemu_get_byte(f);
|
|
s->id.unused = qemu_get_byte(f);
|
|
for (i = 0; i < ARRAY_SIZE(s->id.ciw); i++) {
|
|
s->id.ciw[i].type = qemu_get_byte(f);
|
|
s->id.ciw[i].command = qemu_get_byte(f);
|
|
s->id.ciw[i].count = qemu_get_be16(f);
|
|
}
|
|
s->ccw_fmt_1 = qemu_get_byte(f);
|
|
s->ccw_no_data_cnt = qemu_get_byte(f);
|
|
/*
|
|
* Hack alert. We don't migrate the channel subsystem status (no
|
|
* device!), but we need to find out if the guest enabled mss/mcss-e.
|
|
* If the subchannel is enabled, it certainly was able to access it,
|
|
* so adjust the max_ssid/max_cssid values for relevant ssid/cssid
|
|
* values. This is not watertight, but better than nothing.
|
|
*/
|
|
if (s->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA) {
|
|
if (s->ssid) {
|
|
channel_subsys.max_ssid = MAX_SSID;
|
|
}
|
|
if (s->cssid != channel_subsys.default_cssid) {
|
|
channel_subsys.max_cssid = MAX_CSSID;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void css_reset_sch(SubchDev *sch)
|
|
{
|
|
PMCW *p = &sch->curr_status.pmcw;
|
|
|
|
if ((p->flags & PMCW_FLAGS_MASK_ENA) != 0 && sch->disable_cb) {
|
|
sch->disable_cb(sch);
|
|
}
|
|
|
|
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->thinint_active = false;
|
|
}
|
|
|
|
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.sei_pending = false;
|
|
channel_subsys.do_crw_mchk = true;
|
|
channel_subsys.crws_lost = false;
|
|
|
|
/* Reset maximum ids. */
|
|
channel_subsys.max_cssid = 0;
|
|
channel_subsys.max_ssid = 0;
|
|
}
|
|
|
|
static void get_css_devid(Object *obj, Visitor *v, const char *name,
|
|
void *opaque, Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
CssDevId *dev_id = qdev_get_prop_ptr(dev, prop);
|
|
char buffer[] = "xx.x.xxxx";
|
|
char *p = buffer;
|
|
int r;
|
|
|
|
if (dev_id->valid) {
|
|
|
|
r = snprintf(buffer, sizeof(buffer), "%02x.%1x.%04x", dev_id->cssid,
|
|
dev_id->ssid, dev_id->devid);
|
|
assert(r == sizeof(buffer) - 1);
|
|
|
|
/* drop leading zero */
|
|
if (dev_id->cssid <= 0xf) {
|
|
p++;
|
|
}
|
|
} else {
|
|
snprintf(buffer, sizeof(buffer), "<unset>");
|
|
}
|
|
|
|
visit_type_str(v, name, &p, errp);
|
|
}
|
|
|
|
/*
|
|
* parse <cssid>.<ssid>.<devid> and assert valid range for cssid/ssid
|
|
*/
|
|
static void set_css_devid(Object *obj, Visitor *v, const char *name,
|
|
void *opaque, Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
CssDevId *dev_id = qdev_get_prop_ptr(dev, prop);
|
|
Error *local_err = NULL;
|
|
char *str;
|
|
int num, n1, n2;
|
|
unsigned int cssid, ssid, devid;
|
|
|
|
if (dev->realized) {
|
|
qdev_prop_set_after_realize(dev, name, errp);
|
|
return;
|
|
}
|
|
|
|
visit_type_str(v, name, &str, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
num = sscanf(str, "%2x.%1x%n.%4x%n", &cssid, &ssid, &n1, &devid, &n2);
|
|
if (num != 3 || (n2 - n1) != 5 || strlen(str) != n2) {
|
|
error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
|
|
goto out;
|
|
}
|
|
if ((cssid > MAX_CSSID) || (ssid > MAX_SSID)) {
|
|
error_setg(errp, "Invalid cssid or ssid: cssid %x, ssid %x",
|
|
cssid, ssid);
|
|
goto out;
|
|
}
|
|
|
|
dev_id->cssid = cssid;
|
|
dev_id->ssid = ssid;
|
|
dev_id->devid = devid;
|
|
dev_id->valid = true;
|
|
|
|
out:
|
|
g_free(str);
|
|
}
|
|
|
|
PropertyInfo css_devid_propinfo = {
|
|
.name = "str",
|
|
.description = "Identifier of an I/O device in the channel "
|
|
"subsystem, example: fe.1.23ab",
|
|
.get = get_css_devid,
|
|
.set = set_css_devid,
|
|
};
|
|
|
|
SubchDev *css_create_virtual_sch(CssDevId bus_id, Error **errp)
|
|
{
|
|
uint16_t schid = 0;
|
|
SubchDev *sch;
|
|
|
|
if (bus_id.valid) {
|
|
/* Enforce use of virtual cssid. */
|
|
if (bus_id.cssid != VIRTUAL_CSSID) {
|
|
error_setg(errp, "cssid %hhx not valid for virtual devices",
|
|
bus_id.cssid);
|
|
return NULL;
|
|
}
|
|
if (!css_find_free_subch_for_devno(bus_id.cssid, bus_id.ssid,
|
|
bus_id.devid, &schid, errp)) {
|
|
return NULL;
|
|
}
|
|
} else {
|
|
bus_id.cssid = VIRTUAL_CSSID;
|
|
if (!css_find_free_subch_and_devno(bus_id.cssid, &bus_id.ssid,
|
|
&bus_id.devid, &schid, errp)) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
sch = g_malloc0(sizeof(*sch));
|
|
sch->cssid = bus_id.cssid;
|
|
sch->ssid = bus_id.ssid;
|
|
sch->devno = bus_id.devid;
|
|
sch->schid = schid;
|
|
css_subch_assign(sch->cssid, sch->ssid, schid, sch->devno, sch);
|
|
return sch;
|
|
}
|