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/*
* Copyright (C) 2022 Linaro Ltd.
*
* This program 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; version 2.1 only. with the special
* exception on linking described in file LICENSE.
*
* This program 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.
*/
#include "libxl_internal.h"
static int libxl__device_virtio_setdefault(libxl__gc *gc, uint32_t domid,
libxl_device_virtio *virtio,
bool hotplug)
{
return libxl__resolve_domid(gc, virtio->backend_domname,
&virtio->backend_domid);
}
static int libxl__device_from_virtio(libxl__gc *gc, uint32_t domid,
libxl_device_virtio *virtio,
libxl__device *device)
{
device->backend_devid = virtio->devid;
device->backend_domid = virtio->backend_domid;
device->devid = virtio->devid;
device->domid = domid;
device->backend_kind = LIBXL__DEVICE_KIND_VIRTIO;
device->kind = LIBXL__DEVICE_KIND_VIRTIO;
return 0;
}
static int libxl__set_xenstore_virtio(libxl__gc *gc, uint32_t domid,
libxl_device_virtio *virtio,
flexarray_t *back, flexarray_t *front,
flexarray_t *ro_front)
{
const char *transport = libxl_virtio_transport_to_string(virtio->transport);
flexarray_append_pair(back, "irq", GCSPRINTF("%u", virtio->irq));
flexarray_append_pair(back, "base", GCSPRINTF("%#"PRIx64, virtio->base));
flexarray_append_pair(back, "type", GCSPRINTF("%s", virtio->type));
flexarray_append_pair(back, "transport", GCSPRINTF("%s", transport));
flexarray_append_pair(front, "irq", GCSPRINTF("%u", virtio->irq));
flexarray_append_pair(front, "base", GCSPRINTF("%#"PRIx64, virtio->base));
flexarray_append_pair(front, "type", GCSPRINTF("%s", virtio->type));
flexarray_append_pair(front, "transport", GCSPRINTF("%s", transport));
return 0;
}
static int libxl__virtio_from_xenstore(libxl__gc *gc, const char *libxl_path,
libxl_devid devid,
libxl_device_virtio *virtio)
{
const char *be_path, *tmp = NULL;
int rc;
virtio->devid = devid;
rc = libxl__xs_read_mandatory(gc, XBT_NULL,
GCSPRINTF("%s/backend", libxl_path),
&be_path);
if (rc) goto out;
rc = libxl__backendpath_parse_domid(gc, be_path, &virtio->backend_domid);
if (rc) goto out;
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/irq", be_path), &tmp);
if (rc) goto out;
if (tmp) {
virtio->irq = strtoul(tmp, NULL, 0);
}
tmp = NULL;
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/base", be_path), &tmp);
if (rc) goto out;
if (tmp) {
virtio->base = strtoul(tmp, NULL, 0);
}
tmp = NULL;
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/transport", be_path), &tmp);
if (rc) goto out;
if (tmp) {
if (!strcmp(tmp, "mmio")) {
virtio->transport = LIBXL_VIRTIO_TRANSPORT_MMIO;
} else {
return ERROR_INVAL;
}
}
tmp = NULL;
rc = libxl__xs_read_checked(gc, XBT_NULL,
GCSPRINTF("%s/type", be_path), &tmp);
if (rc) goto out;
if (tmp) {
int len = sizeof(VIRTIO_DEVICE_TYPE_GENERIC) - 1;
if (!strncmp(tmp, VIRTIO_DEVICE_TYPE_GENERIC, len)) {
virtio->type = libxl__strdup(NOGC, tmp);
} else {
return ERROR_INVAL;
}
}
out:
return rc;
}
static LIBXL_DEFINE_UPDATE_DEVID(virtio)
#define libxl__add_virtios NULL
#define libxl_device_virtio_compare NULL
DEFINE_DEVICE_TYPE_STRUCT(virtio, VIRTIO, virtios,
.set_xenstore_config = (device_set_xenstore_config_fn_t)
libxl__set_xenstore_virtio,
.from_xenstore = (device_from_xenstore_fn_t)libxl__virtio_from_xenstore,
.skip_attach = 1
);
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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