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/*
* virccw.c: helper APIs for managing host CCW devices
*
* Copyright (C) 2022 IBM Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "virccw.h"
#include "virerror.h"
#include "virstring.h"
#define VIR_FROM_THIS VIR_FROM_NONE
bool
virCCWDeviceAddressIsValid(virCCWDeviceAddress *addr)
{
return addr->cssid <= VIR_CCW_DEVICE_MAX_CSSID &&
addr->ssid <= VIR_CCW_DEVICE_MAX_SSID &&
addr->devno <= VIR_CCW_DEVICE_MAX_DEVNO;
}
bool
virCCWDeviceAddressEqual(virCCWDeviceAddress *addr1,
virCCWDeviceAddress *addr2)
{
if (addr1->cssid == addr2->cssid &&
addr1->ssid == addr2->ssid &&
addr1->devno == addr2->devno) {
return true;
}
return false;
}
char*
virCCWDeviceAddressAsString(virCCWDeviceAddress *addr)
{
return g_strdup_printf(VIR_CCW_DEVICE_ADDRESS_FMT, addr->cssid, addr->ssid, addr->devno);
}
virCCWDeviceAddress *
virCCWDeviceAddressFromString(const char *address)
{
g_autofree virCCWDeviceAddress *ccw = NULL;
ccw = g_new0(virCCWDeviceAddress, 1);
if (virCCWDeviceAddressParseFromString(address,
&ccw->cssid,
&ccw->ssid,
&ccw->devno) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to parse CCW address '%1$s'"),
address);
return NULL;
}
return g_steal_pointer(&ccw);
}
int
virCCWDeviceAddressIncrement(virCCWDeviceAddress *addr)
{
virCCWDeviceAddress ccwaddr = *addr;
/* We are not touching subchannel sets and channel subsystems */
if (++ccwaddr.devno > VIR_CCW_DEVICE_MAX_DEVNO)
return -1;
*addr = ccwaddr;
return 0;
}
int
virCCWDeviceAddressParseFromString(const char *address,
unsigned int *cssid,
unsigned int *ssid,
unsigned int *devno)
{
char *p;
if (address == NULL || virStrToLong_ui(address, &p, 16, cssid) < 0 ||
p == NULL || virStrToLong_ui(p + 1, &p, 16, ssid) < 0 ||
p == NULL || virStrToLong_ui(p + 1, &p, 16, devno) < 0) {
return -1;
}
return 0;
}
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