int
vmbus_chan_send(struct vmbus_channel *chan, uint16_t type, uint16_t flags,
void *data, int dlen, uint64_t xactid)
{
struct vmbus_chanpkt pkt;
int pktlen, pad_pktlen, hlen, error;
uint64_t pad = 0;
struct iovec iov[3];
boolean_t send_evt;
hlen = sizeof(pkt);
pktlen = hlen + dlen;
pad_pktlen = VMBUS_CHANPKT_TOTLEN(pktlen);
KASSERT(pad_pktlen <= vmbus_txbr_maxpktsz(&chan->ch_txbr),
("invalid packet size %d", pad_pktlen));
pkt.cp_hdr.cph_type = type;
pkt.cp_hdr.cph_flags = flags;
VMBUS_CHANPKT_SETLEN(pkt.cp_hdr.cph_hlen, hlen);
VMBUS_CHANPKT_SETLEN(pkt.cp_hdr.cph_tlen, pad_pktlen);
pkt.cp_hdr.cph_xactid = xactid;
iov[0].iov_base = &pkt;
iov[0].iov_len = hlen;
iov[1].iov_base = data;
iov[1].iov_len = dlen;
iov[2].iov_base = &pad;
iov[2].iov_len = pad_pktlen - pktlen;
error = vmbus_txbr_write(&chan->ch_txbr, iov, 3, &send_evt);
if (!error && send_evt)
vmbus_chan_signal_tx(chan);
return error;
}
/* Do a scatter/gather send where the descriptor points to data. */
int rte_vmbus_chan_send_sglist(struct vmbus_channel *chan,
struct vmbus_gpa sg[], uint32_t sglen,
void *data, uint32_t dlen,
uint64_t xactid, bool *need_sig)
{
struct vmbus_chanpkt_sglist pkt;
unsigned int pktlen, pad_pktlen, hlen;
bool send_evt = false;
struct iovec iov[4];
uint64_t pad = 0;
int error;
hlen = offsetof(struct vmbus_chanpkt_sglist, gpa[sglen]);
pktlen = hlen + dlen;
pad_pktlen = RTE_ALIGN(pktlen, sizeof(uint64_t));
pkt.hdr.type = VMBUS_CHANPKT_TYPE_GPA;
pkt.hdr.flags = VMBUS_CHANPKT_FLAG_RC;
pkt.hdr.hlen = hlen >> VMBUS_CHANPKT_SIZE_SHIFT;
pkt.hdr.tlen = pad_pktlen >> VMBUS_CHANPKT_SIZE_SHIFT;
pkt.hdr.xactid = xactid;
pkt.rsvd = 0;
pkt.gpa_cnt = sglen;
iov[0].iov_base = &pkt;
iov[0].iov_len = sizeof(pkt);
iov[1].iov_base = sg;
iov[1].iov_len = sizeof(struct vmbus_gpa) * sglen;
iov[2].iov_base = data;
iov[2].iov_len = dlen;
iov[3].iov_base = &pad;
iov[3].iov_len = pad_pktlen - pktlen;
error = vmbus_txbr_write(&chan->txbr, iov, 4, &send_evt);
/* if caller is batching, just propagate the status */
if (need_sig)
*need_sig |= send_evt;
else if (error == 0 && send_evt)
rte_vmbus_chan_signal_tx(chan);
return error;
}
/* Do a simple send directly using transmit ring. */
int rte_vmbus_chan_send(struct vmbus_channel *chan, uint16_t type,
void *data, uint32_t dlen,
uint64_t xactid, uint32_t flags, bool *need_sig)
{
struct vmbus_chanpkt pkt;
unsigned int pktlen, pad_pktlen;
const uint32_t hlen = sizeof(pkt);
bool send_evt = false;
uint64_t pad = 0;
struct iovec iov[3];
int error;
pktlen = hlen + dlen;
pad_pktlen = RTE_ALIGN(pktlen, sizeof(uint64_t));
pkt.hdr.type = type;
pkt.hdr.flags = flags;
pkt.hdr.hlen = hlen >> VMBUS_CHANPKT_SIZE_SHIFT;
pkt.hdr.tlen = pad_pktlen >> VMBUS_CHANPKT_SIZE_SHIFT;
pkt.hdr.xactid = xactid;
iov[0].iov_base = &pkt;
iov[0].iov_len = hlen;
iov[1].iov_base = data;
iov[1].iov_len = dlen;
iov[2].iov_base = &pad;
iov[2].iov_len = pad_pktlen - pktlen;
error = vmbus_txbr_write(&chan->txbr, iov, 3, &send_evt);
/*
* caller sets need_sig to non-NULL if it will handle
* signaling if required later.
* if need_sig is NULL, signal now if needed.
*/
if (need_sig)
*need_sig |= send_evt;
else if (error == 0 && send_evt)
rte_vmbus_chan_signal_tx(chan);
return error;
}
int
vmbus_chan_send_prplist(struct vmbus_channel *chan,
struct vmbus_gpa_range *prp, int prp_cnt, void *data, int dlen,
uint64_t xactid)
{
struct vmbus_chanpkt_prplist pkt;
int pktlen, pad_pktlen, hlen, error;
struct iovec iov[4];
boolean_t send_evt;
uint64_t pad = 0;
hlen = __offsetof(struct vmbus_chanpkt_prplist,
cp_range[0].gpa_page[prp_cnt]);
pktlen = hlen + dlen;
pad_pktlen = VMBUS_CHANPKT_TOTLEN(pktlen);
KASSERT(pad_pktlen <= vmbus_txbr_maxpktsz(&chan->ch_txbr),
("invalid packet size %d", pad_pktlen));
pkt.cp_hdr.cph_type = VMBUS_CHANPKT_TYPE_GPA;
pkt.cp_hdr.cph_flags = VMBUS_CHANPKT_FLAG_RC;
VMBUS_CHANPKT_SETLEN(pkt.cp_hdr.cph_hlen, hlen);
VMBUS_CHANPKT_SETLEN(pkt.cp_hdr.cph_tlen, pad_pktlen);
pkt.cp_hdr.cph_xactid = xactid;
pkt.cp_rsvd = 0;
pkt.cp_range_cnt = 1;
iov[0].iov_base = &pkt;
iov[0].iov_len = sizeof(pkt);
iov[1].iov_base = prp;
iov[1].iov_len = __offsetof(struct vmbus_gpa_range, gpa_page[prp_cnt]);
iov[2].iov_base = data;
iov[2].iov_len = dlen;
iov[3].iov_base = &pad;
iov[3].iov_len = pad_pktlen - pktlen;
error = vmbus_txbr_write(&chan->ch_txbr, iov, 4, &send_evt);
if (!error && send_evt)
vmbus_chan_signal_tx(chan);
return error;
}