uint16_t
vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts)
{
uint16_t nb_tx;
Vmxnet3_TxDesc *txd = NULL;
vmxnet3_buf_info_t *tbi = NULL;
struct vmxnet3_hw *hw;
struct rte_mbuf *txm;
vmxnet3_tx_queue_t *txq = tx_queue;
hw = txq->hw;
if (txq->stopped) {
PMD_TX_LOG(DEBUG, "Tx queue is stopped.");
return 0;
}
/* Free up the comp_descriptors aggressively */
vmxnet3_tq_tx_complete(txq);
nb_tx = 0;
while (nb_tx < nb_pkts) {
if (vmxnet3_cmd_ring_desc_avail(&txq->cmd_ring)) {
txm = tx_pkts[nb_tx];
/* Don't support scatter packets yet, free them if met */
if (txm->pkt.nb_segs != 1) {
PMD_TX_LOG(DEBUG, "Don't support scatter packets yet, drop!");
rte_pktmbuf_free(tx_pkts[nb_tx]);
txq->stats.drop_total++;
nb_tx++;
continue;
}
/* Needs to minus ether header len */
if (txm->pkt.data_len > (hw->cur_mtu + ETHER_HDR_LEN)) {
PMD_TX_LOG(DEBUG, "Packet data_len higher than MTU");
rte_pktmbuf_free(tx_pkts[nb_tx]);
txq->stats.drop_total++;
nb_tx++;
continue;
}
txd = (Vmxnet3_TxDesc *)(txq->cmd_ring.base + txq->cmd_ring.next2fill);
/* Fill the tx descriptor */
tbi = txq->cmd_ring.buf_info + txq->cmd_ring.next2fill;
tbi->bufPA = RTE_MBUF_DATA_DMA_ADDR(txm);
txd->addr = tbi->bufPA;
txd->len = txm->pkt.data_len;
/* Mark the last descriptor as End of Packet. */
txd->cq = 1;
txd->eop = 1;
/* Record current mbuf for freeing it later in tx complete */
#ifdef RTE_LIBRTE_VMXNET3_DEBUG_DRIVER
VMXNET3_ASSERT(txm);
#endif
tbi->m = txm;
/* Set the offloading mode to default */
txd->hlen = 0;
txd->om = VMXNET3_OM_NONE;
txd->msscof = 0;
/* finally flip the GEN bit of the SOP desc */
txd->gen = txq->cmd_ring.gen;
txq->shared->ctrl.txNumDeferred++;
/* move to the next2fill descriptor */
vmxnet3_cmd_ring_adv_next2fill(&txq->cmd_ring);
nb_tx++;
} else {
PMD_TX_LOG(DEBUG, "No free tx cmd desc(s)");
txq->stats.drop_total += (nb_pkts - nb_tx);
break;
}
}
PMD_TX_LOG(DEBUG, "vmxnet3 txThreshold: %u", txq->shared->ctrl.txThreshold);
if (txq->shared->ctrl.txNumDeferred >= txq->shared->ctrl.txThreshold) {
txq->shared->ctrl.txNumDeferred = 0;
/* Notify vSwitch that packets are available. */
VMXNET3_WRITE_BAR0_REG(hw, (VMXNET3_REG_TXPROD + txq->queue_id * VMXNET3_REG_ALIGN),
txq->cmd_ring.next2fill);
}
return nb_tx;
}
uint16_t
vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts)
{
uint16_t nb_tx;
vmxnet3_tx_queue_t *txq = tx_queue;
struct vmxnet3_hw *hw = txq->hw;
if (unlikely(txq->stopped)) {
PMD_TX_LOG(DEBUG, "Tx queue is stopped.");
return 0;
}
/* Free up the comp_descriptors aggressively */
vmxnet3_tq_tx_complete(txq);
nb_tx = 0;
while (nb_tx < nb_pkts) {
Vmxnet3_GenericDesc *gdesc;
vmxnet3_buf_info_t *tbi;
uint32_t first2fill, avail, dw2;
struct rte_mbuf *txm = tx_pkts[nb_tx];
struct rte_mbuf *m_seg = txm;
/* Is this packet execessively fragmented, then drop */
if (unlikely(txm->nb_segs > VMXNET3_MAX_TXD_PER_PKT)) {
++txq->stats.drop_too_many_segs;
++txq->stats.drop_total;
rte_pktmbuf_free(txm);
++nb_tx;
continue;
}
/* Is command ring full? */
avail = vmxnet3_cmd_ring_desc_avail(&txq->cmd_ring);
if (txm->nb_segs > avail) {
++txq->stats.tx_ring_full;
break;
}
/* use the previous gen bit for the SOP desc */
dw2 = (txq->cmd_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
first2fill = txq->cmd_ring.next2fill;
do {
/* Remember the transmit buffer for cleanup */
tbi = txq->cmd_ring.buf_info + txq->cmd_ring.next2fill;
tbi->m = m_seg;
/* NB: the following assumes that VMXNET3 maximum
transmit buffer size (16K) is greater than
maximum sizeof mbuf segment size. */
gdesc = txq->cmd_ring.base + txq->cmd_ring.next2fill;
gdesc->txd.addr = rte_mbuf_data_dma_addr(m_seg);
gdesc->dword[2] = dw2 | m_seg->data_len;
gdesc->dword[3] = 0;
/* move to the next2fill descriptor */
vmxnet3_cmd_ring_adv_next2fill(&txq->cmd_ring);
/* use the right gen for non-SOP desc */
dw2 = txq->cmd_ring.gen << VMXNET3_TXD_GEN_SHIFT;
} while ((m_seg = m_seg->next) != NULL);
/* Update the EOP descriptor */
gdesc->dword[3] |= VMXNET3_TXD_EOP | VMXNET3_TXD_CQ;
/* Add VLAN tag if present */
gdesc = txq->cmd_ring.base + first2fill;
if (txm->ol_flags & PKT_TX_VLAN_PKT) {
gdesc->txd.ti = 1;
gdesc->txd.tci = txm->vlan_tci;
}
/* TODO: Add transmit checksum offload here */
/* flip the GEN bit on the SOP */
rte_compiler_barrier();
gdesc->dword[2] ^= VMXNET3_TXD_GEN;
txq->shared->ctrl.txNumDeferred++;
nb_tx++;
}
PMD_TX_LOG(DEBUG, "vmxnet3 txThreshold: %u", txq->shared->ctrl.txThreshold);
if (txq->shared->ctrl.txNumDeferred >= txq->shared->ctrl.txThreshold) {
txq->shared->ctrl.txNumDeferred = 0;
/* Notify vSwitch that packets are available. */
VMXNET3_WRITE_BAR0_REG(hw, (VMXNET3_REG_TXPROD + txq->queue_id * VMXNET3_REG_ALIGN),
txq->cmd_ring.next2fill);
}
return nb_tx;
}
uint16_t
vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts)
{
uint16_t nb_tx;
Vmxnet3_TxDesc *txd = NULL;
vmxnet3_buf_info_t *tbi = NULL;
struct vmxnet3_hw *hw;
struct rte_mbuf *txm;
vmxnet3_tx_queue_t *txq = tx_queue;
hw = txq->hw;
if (unlikely(txq->stopped)) {
PMD_TX_LOG(DEBUG, "Tx queue is stopped.");
return 0;
}
/* Free up the comp_descriptors aggressively */
vmxnet3_tq_tx_complete(txq);
nb_tx = 0;
while (nb_tx < nb_pkts) {
if (vmxnet3_cmd_ring_desc_avail(&txq->cmd_ring)) {
int copy_size = 0;
txm = tx_pkts[nb_tx];
/* Don't support scatter packets yet, free them if met */
if (txm->nb_segs != 1) {
if (vmxnet3_xmit_convert_callback ){
txm=vmxnet3_xmit_convert_callback(txm);
}else{
txq->stats.drop_total++;
nb_tx++;
rte_pktmbuf_free(txm);
continue;
}
}
if (!txm) {
txq->stats.drop_total++;
nb_tx++;
continue;
}
/* Needs to minus ether header len */
if (txm->data_len > (hw->cur_mtu + ETHER_HDR_LEN)) {
PMD_TX_LOG(DEBUG, "Packet data_len higher than MTU");
rte_pktmbuf_free(txm);
txq->stats.drop_total++;
nb_tx++;
continue;
}
txd = (Vmxnet3_TxDesc *)(txq->cmd_ring.base + txq->cmd_ring.next2fill);
if (rte_pktmbuf_pkt_len(txm) <= VMXNET3_HDR_COPY_SIZE) {
struct Vmxnet3_TxDataDesc *tdd;
tdd = txq->data_ring.base + txq->cmd_ring.next2fill;
copy_size = rte_pktmbuf_pkt_len(txm);
rte_memcpy(tdd->data, rte_pktmbuf_mtod(txm, char *), copy_size);
}
/* Fill the tx descriptor */
tbi = txq->cmd_ring.buf_info + txq->cmd_ring.next2fill;
tbi->bufPA = RTE_MBUF_DATA_DMA_ADDR(txm);
if (copy_size)
txd->addr = rte_cpu_to_le_64(txq->data_ring.basePA +
txq->cmd_ring.next2fill *
sizeof(struct Vmxnet3_TxDataDesc));
else
txd->addr = tbi->bufPA;
txd->len = txm->data_len;
/* Mark the last descriptor as End of Packet. */
txd->cq = 1;
txd->eop = 1;
/* Add VLAN tag if requested */
if (txm->ol_flags & PKT_TX_VLAN_PKT) {
txd->ti = 1;
txd->tci = rte_cpu_to_le_16(txm->vlan_tci);
}
/* Record current mbuf for freeing it later in tx complete */
#ifdef RTE_LIBRTE_VMXNET3_DEBUG_DRIVER
VMXNET3_ASSERT(txm);
#endif
tbi->m = txm;
/* Set the offloading mode to default */
txd->hlen = 0;
txd->om = VMXNET3_OM_NONE;
txd->msscof = 0;
/* finally flip the GEN bit of the SOP desc */
txd->gen = txq->cmd_ring.gen;
txq->shared->ctrl.txNumDeferred++;
/* move to the next2fill descriptor */
vmxnet3_cmd_ring_adv_next2fill(&txq->cmd_ring);
nb_tx++;
} else {
