return true;
}
-static void
-sfc_ef10_tx_reap(struct sfc_ef10_txq *txq)
+static unsigned int
+sfc_ef10_tx_process_events(struct sfc_ef10_txq *txq)
{
- const unsigned int old_read_ptr = txq->evq_read_ptr;
- const unsigned int ptr_mask = txq->ptr_mask;
- unsigned int completed = txq->completed;
- unsigned int pending = completed;
- const unsigned int curr_done = pending - 1;
+ const unsigned int curr_done = txq->completed - 1;
unsigned int anew_done = curr_done;
efx_qword_t tx_ev;
/* Update the latest done descriptor */
anew_done = EFX_QWORD_FIELD(tx_ev, ESF_DZ_TX_DESCR_INDX);
}
- pending += (anew_done - curr_done) & ptr_mask;
+ return (anew_done - curr_done) & txq->ptr_mask;
+}
+
+static void
+sfc_ef10_tx_reap(struct sfc_ef10_txq *txq)
+{
+ const unsigned int old_read_ptr = txq->evq_read_ptr;
+ const unsigned int ptr_mask = txq->ptr_mask;
+ unsigned int completed = txq->completed;
+ unsigned int pending = completed;
+
+ pending += sfc_ef10_tx_process_events(txq);
if (pending != completed) {
+ struct rte_mbuf *bulk[SFC_TX_REAP_BULK_SIZE];
+ unsigned int nb = 0;
+
do {
struct sfc_ef10_tx_sw_desc *txd;
+ struct rte_mbuf *m;
txd = &txq->sw_ring[completed & ptr_mask];
-
- if (txd->mbuf != NULL) {
- rte_pktmbuf_free(txd->mbuf);
- txd->mbuf = NULL;
+ if (txd->mbuf == NULL)
+ continue;
+
+ m = rte_pktmbuf_prefree_seg(txd->mbuf);
+ txd->mbuf = NULL;
+ if (m == NULL)
+ continue;
+
+ if ((nb == RTE_DIM(bulk)) ||
+ ((nb != 0) && (m->pool != bulk[0]->pool))) {
+ rte_mempool_put_bulk(bulk[0]->pool,
+ (void *)bulk, nb);
+ nb = 0;
}
+
+ bulk[nb++] = m;
} while (++completed != pending);
+ if (nb != 0)
+ rte_mempool_put_bulk(bulk[0]->pool, (void *)bulk, nb);
+
txq->completed = completed;
}
pkt_len = m_seg->pkt_len;
do {
- phys_addr_t seg_addr = rte_mbuf_data_dma_addr(m_seg);
+ phys_addr_t seg_addr = rte_mbuf_data_iova(m_seg);
unsigned int seg_len = rte_pktmbuf_data_len(m_seg);
+ unsigned int id = added & ptr_mask;
SFC_ASSERT(seg_len <= SFC_EF10_TX_DMA_DESC_LEN_MAX);
sfc_ef10_tx_qdesc_dma_create(seg_addr,
seg_len, (pkt_len == 0),
- &txq->txq_hw_ring[added & ptr_mask]);
+ &txq->txq_hw_ring[id]);
+
+ /*
+ * rte_pktmbuf_free() is commonly used in DPDK for
+ * recycling packets - the function checks every
+ * segment's reference counter and returns the
+ * buffer to its pool whenever possible;
+ * nevertheless, freeing mbuf segments one by one
+ * may entail some performance decline;
+ * from this point, sfc_efx_tx_reap() does the same job
+ * on its own and frees buffers in bulks (all mbufs
+ * within a bulk belong to the same pool);
+ * from this perspective, individual segment pointers
+ * must be associated with the corresponding SW
+ * descriptors independently so that only one loop
+ * is sufficient on reap to inspect all the buffers
+ */
+ txq->sw_ring[id].mbuf = m_seg;
+
++added;
} while ((m_seg = m_seg->next) != 0);
dma_desc_space -= (added - pkt_start);
-
- /* Assign mbuf to the last used desc */
- txq->sw_ring[(added - 1) & ptr_mask].mbuf = *pktp;
}
if (likely(added != txq->added)) {
return pktp - &tx_pkts[0];
}
+static void
+sfc_ef10_simple_tx_reap(struct sfc_ef10_txq *txq)
+{
+ const unsigned int old_read_ptr = txq->evq_read_ptr;
+ const unsigned int ptr_mask = txq->ptr_mask;
+ unsigned int completed = txq->completed;
+ unsigned int pending = completed;
+
+ pending += sfc_ef10_tx_process_events(txq);
+
+ if (pending != completed) {
+ struct rte_mbuf *bulk[SFC_TX_REAP_BULK_SIZE];
+ unsigned int nb = 0;
+
+ do {
+ struct sfc_ef10_tx_sw_desc *txd;
+
+ txd = &txq->sw_ring[completed & ptr_mask];
+
+ if (nb == RTE_DIM(bulk)) {
+ rte_mempool_put_bulk(bulk[0]->pool,
+ (void *)bulk, nb);
+ nb = 0;
+ }
+
+ bulk[nb++] = txd->mbuf;
+ } while (++completed != pending);
+
+ rte_mempool_put_bulk(bulk[0]->pool, (void *)bulk, nb);
+
+ txq->completed = completed;
+ }
+
+ sfc_ef10_ev_qclear(txq->evq_hw_ring, ptr_mask, old_read_ptr,
+ txq->evq_read_ptr);
+}
+
+
static uint16_t
sfc_ef10_simple_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts)
reap_done = (dma_desc_space < RTE_MAX(txq->free_thresh, nb_pkts));
if (reap_done) {
- sfc_ef10_tx_reap(txq);
+ sfc_ef10_simple_tx_reap(txq);
dma_desc_space = SFC_EF10_TXQ_LIMIT(ptr_mask + 1) -
(added - txq->completed);
}
SFC_ASSERT(rte_pktmbuf_data_len(pkt) <=
SFC_EF10_TX_DMA_DESC_LEN_MAX);
- sfc_ef10_tx_qdesc_dma_create(rte_mbuf_data_dma_addr(pkt),
+ sfc_ef10_tx_qdesc_dma_create(rte_mbuf_data_iova(pkt),
rte_pktmbuf_data_len(pkt),
true, &txq->txq_hw_ring[id]);
#if SFC_TX_XMIT_PKTS_REAP_AT_LEAST_ONCE
if (!reap_done)
- sfc_ef10_tx_reap(txq);
+ sfc_ef10_simple_tx_reap(txq);
#endif
return pktp - &tx_pkts[0];
sfc_ef10_tx_qreap(struct sfc_dp_txq *dp_txq)
{
struct sfc_ef10_txq *txq = sfc_ef10_txq_by_dp_txq(dp_txq);
- unsigned int txds;
+ unsigned int completed;
- for (txds = 0; txds <= txq->ptr_mask; ++txds) {
- if (txq->sw_ring[txds].mbuf != NULL) {
- rte_pktmbuf_free(txq->sw_ring[txds].mbuf);
- txq->sw_ring[txds].mbuf = NULL;
+ for (completed = txq->completed; completed != txq->added; ++completed) {
+ struct sfc_ef10_tx_sw_desc *txd;
+
+ txd = &txq->sw_ring[completed & txq->ptr_mask];
+ if (txd->mbuf != NULL) {
+ rte_pktmbuf_free_seg(txd->mbuf);
+ txd->mbuf = NULL;
}
}
txq->flags &= ~SFC_EF10_TXQ_STARTED;
}
+static sfc_dp_tx_qdesc_status_t sfc_ef10_tx_qdesc_status;
+static int
+sfc_ef10_tx_qdesc_status(__rte_unused struct sfc_dp_txq *dp_txq,
+ __rte_unused uint16_t offset)
+{
+ return -ENOTSUP;
+}
+
struct sfc_dp_tx sfc_ef10_tx = {
.dp = {
.name = SFC_KVARG_DATAPATH_EF10,
.hw_fw_caps = SFC_DP_HW_FW_CAP_EF10,
},
.features = SFC_DP_TX_FEAT_MULTI_SEG |
+ SFC_DP_TX_FEAT_MULTI_POOL |
+ SFC_DP_TX_FEAT_REFCNT |
SFC_DP_TX_FEAT_MULTI_PROCESS,
.qcreate = sfc_ef10_tx_qcreate,
.qdestroy = sfc_ef10_tx_qdestroy,
.qtx_ev = sfc_ef10_tx_qtx_ev,
.qstop = sfc_ef10_tx_qstop,
.qreap = sfc_ef10_tx_qreap,
+ .qdesc_status = sfc_ef10_tx_qdesc_status,
.pkt_burst = sfc_ef10_xmit_pkts,
};
.qtx_ev = sfc_ef10_tx_qtx_ev,
.qstop = sfc_ef10_tx_qstop,
.qreap = sfc_ef10_tx_qreap,
+ .qdesc_status = sfc_ef10_tx_qdesc_status,
.pkt_burst = sfc_ef10_simple_xmit_pkts,
};
git.droids-corp.org / dpdk.git / blobdiff