[dpdk-dev] [memnic PATCH 5/5] pmd: handle multiple segments on xmit
Hiroshi Shimamoto
h-shimamoto at ct.jp.nec.com
Tue Mar 11 06:40:26 CET 2014
From: Hiroshi Shimamoto <h-shimamoto at ct.jp.nec.com>
The current MEMNIC PMD cannot handle multiple segments.
Add the functionality to transmit a mbuf which has multiple segments.
Walk every segment in transmitting mbuf and copy the data to MEMNIC
packet buffer.
Signed-off-by: Hiroshi Shimamoto <h-shimamoto at ct.jp.nec.com>
Reviewed-by: Hayato Momma <h-momma at ce.jp.nec.com>
---
pmd/pmd_memnic.c | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/pmd/pmd_memnic.c b/pmd/pmd_memnic.c
index abfd437..4ee655d 100644
--- a/pmd/pmd_memnic.c
+++ b/pmd/pmd_memnic.c
@@ -324,9 +324,11 @@ static uint16_t memnic_xmit_pkts(void *tx_queue,
pkts = bytes = errs = 0;
for (nr = 0; nr < nb_pkts; nr++) {
- int len = rte_pktmbuf_data_len(tx_pkts[nr]);
+ int pkt_len = rte_pktmbuf_pkt_len(tx_pkts[nr]);
+ struct rte_mbuf *sg;
+ void *ptr;
- if (len > MEMNIC_MAX_FRAME_LEN) {
+ if (pkt_len > MEMNIC_MAX_FRAME_LEN) {
errs++;
break;
}
@@ -356,12 +358,19 @@ retry:
idx = 0;
adapter->down_idx = idx;
- p->len = len;
+ p->len = pkt_len;
- rte_memcpy(p->data, rte_pktmbuf_mtod(tx_pkts[nr], void *), len);
+ ptr = p->data;
+ for (sg = tx_pkts[nr]; sg; sg = sg->pkt.next) {
+ void *src = rte_pktmbuf_mtod(sg, void *);
+ int data_len = sg->pkt.data_len;
+
+ rte_memcpy(ptr, src, data_len);
+ ptr += data_len;
+ }
pkts++;
- bytes += len;
+ bytes += pkt_len;
rte_mb();
p->status = MEMNIC_PKT_ST_FILLED;
--
1.8.4
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