static int
hn_rndis_halt(struct hn_softc *sc)
{
struct vmbus_xact *xact;
struct rndis_halt_req *halt;
struct hn_nvs_sendctx sndc;
size_t comp_len;
xact = vmbus_xact_get(sc->hn_xact, sizeof(*halt));
if (xact == NULL) {
if_printf(sc->hn_ifp, "no xact for RNDIS halt\n");
return (ENXIO);
}
halt = vmbus_xact_req_data(xact);
halt->rm_type = REMOTE_NDIS_HALT_MSG;
halt->rm_len = sizeof(*halt);
halt->rm_rid = hn_rndis_rid(sc);
/* No RNDIS completion; rely on NVS message send completion */
hn_nvs_sendctx_init(&sndc, hn_nvs_sent_xact, xact);
hn_rndis_xact_exec1(sc, xact, sizeof(*halt), &sndc, &comp_len);
vmbus_xact_put(xact);
if (bootverbose)
if_printf(sc->hn_ifp, "RNDIS halt done\n");
return (0);
}
static const void *
hn_nvs_xact_execute(struct hn_softc *sc, struct vmbus_xact *xact,
void *req, int reqlen, size_t *resplen0, uint32_t type)
{
struct hn_nvs_sendctx sndc;
size_t resplen, min_resplen = *resplen0;
const struct hn_nvs_hdr *hdr;
int error;
KASSERT(min_resplen >= sizeof(*hdr),
("invalid minimum response len %zu", min_resplen));
/*
* Execute the xact setup by the caller.
*/
hn_nvs_sendctx_init(&sndc, hn_nvs_sent_xact, xact);
vmbus_xact_activate(xact);
error = hn_nvs_send(sc->hn_prichan, VMBUS_CHANPKT_FLAG_RC,
req, reqlen, &sndc);
if (error) {
vmbus_xact_deactivate(xact);
return (NULL);
}
if (HN_CAN_SLEEP(sc))
hdr = vmbus_xact_wait(xact, &resplen);
else
hdr = vmbus_xact_busywait(xact, &resplen);
/*
* Check this NVS response message.
*/
if (resplen < min_resplen) {
if_printf(sc->hn_ifp, "invalid NVS resp len %zu\n", resplen);
return (NULL);
}
if (hdr->nvs_type != type) {
if_printf(sc->hn_ifp, "unexpected NVS resp 0x%08x, "
"expect 0x%08x\n", hdr->nvs_type, type);
return (NULL);
}
/* All pass! */
*resplen0 = resplen;
return (hdr);
}
