static const void *
hn_rndis_xact_exec1(struct hn_softc *sc, struct vmbus_xact *xact, size_t reqlen,
struct hn_nvs_sendctx *sndc, size_t *comp_len)
{
struct vmbus_gpa gpa[HN_XACT_REQ_PGCNT];
int gpa_cnt, error;
bus_addr_t paddr;
KASSERT(reqlen <= HN_XACT_REQ_SIZE && reqlen > 0,
("invalid request length %zu", reqlen));
/*
* Setup the SG list.
*/
paddr = vmbus_xact_req_paddr(xact);
KASSERT((paddr & PAGE_MASK) == 0,
("vmbus xact request is not page aligned 0x%jx", (uintmax_t)paddr));
for (gpa_cnt = 0; gpa_cnt < HN_XACT_REQ_PGCNT; ++gpa_cnt) {
int len = PAGE_SIZE;
if (reqlen == 0)
break;
if (reqlen < len)
len = reqlen;
gpa[gpa_cnt].gpa_page = atop(paddr) + gpa_cnt;
gpa[gpa_cnt].gpa_len = len;
gpa[gpa_cnt].gpa_ofs = 0;
reqlen -= len;
}
KASSERT(reqlen == 0, ("still have %zu request data left", reqlen));
/*
* Send this RNDIS control message and wait for its completion
* message.
*/
vmbus_xact_activate(xact);
error = hn_nvs_send_rndis_ctrl(sc->hn_prichan, sndc, gpa, gpa_cnt);
if (error) {
vmbus_xact_deactivate(xact);
if_printf(sc->hn_ifp, "RNDIS ctrl send failed: %d\n", error);
return (NULL);
}
return (vmbus_chan_xact_wait(sc->hn_prichan, xact, comp_len,
HN_CAN_SLEEP(sc)));
}
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);
}
