From: Ferruh Yigit Date: Tue, 26 Apr 2016 12:37:58 +0000 (+0100) Subject: kni: support chained mbufs X-Git-Tag: spdx-start~6985 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d89a58dfe90be417f153e99b75f4ad5d1f89c2bd;p=dpdk.git kni: support chained mbufs rx_q fifo may have chained mbufs, merge them into single skb before handing to the network stack. Signed-off-by: Ferruh Yigit Acked-by: Helin Zhang --- diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h index 7e5e59845d..2acdfd9bc5 100644 --- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h +++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h @@ -113,7 +113,9 @@ struct rte_kni_mbuf { void *buf_addr __attribute__((__aligned__(RTE_CACHE_LINE_SIZE))); char pad0[10]; uint16_t data_off; /**< Start address of data in segment buffer. */ - char pad1[4]; + char pad1[2]; + uint8_t nb_segs; /**< Number of segments. */ + char pad4[1]; uint64_t ol_flags; /**< Offload features. */ char pad2[4]; uint32_t pkt_len; /**< Total pkt len: sum of all segment data_len. */ diff --git a/lib/librte_eal/linuxapp/kni/kni_net.c b/lib/librte_eal/linuxapp/kni/kni_net.c index 3d2d246e25..4095382755 100644 --- a/lib/librte_eal/linuxapp/kni/kni_net.c +++ b/lib/librte_eal/linuxapp/kni/kni_net.c @@ -147,7 +147,8 @@ kni_net_rx_normal(struct kni_dev *kni) /* Transfer received packets to netif */ for (i = 0; i < num_rx; i++) { kva = (void *)va[i] - kni->mbuf_va + kni->mbuf_kva; - len = kva->data_len; + len = kva->pkt_len; + data_kva = kva->buf_addr + kva->data_off - kni->mbuf_va + kni->mbuf_kva; @@ -156,22 +157,41 @@ kni_net_rx_normal(struct kni_dev *kni) KNI_ERR("Out of mem, dropping pkts\n"); /* Update statistics */ kni->stats.rx_dropped++; + continue; } - else { - /* Align IP on 16B boundary */ - skb_reserve(skb, 2); + + /* Align IP on 16B boundary */ + skb_reserve(skb, 2); + + if (kva->nb_segs == 1) { memcpy(skb_put(skb, len), data_kva, len); - skb->dev = dev; - skb->protocol = eth_type_trans(skb, dev); - skb->ip_summed = CHECKSUM_UNNECESSARY; + } else { + int nb_segs; + int kva_nb_segs = kva->nb_segs; - /* Call netif interface */ - netif_rx_ni(skb); + for (nb_segs = 0; nb_segs < kva_nb_segs; nb_segs++) { + memcpy(skb_put(skb, kva->data_len), + data_kva, kva->data_len); - /* Update statistics */ - kni->stats.rx_bytes += len; - kni->stats.rx_packets++; + if (!kva->next) + break; + + kva = kva->next - kni->mbuf_va + kni->mbuf_kva; + data_kva = kva->buf_addr + kva->data_off + - kni->mbuf_va + kni->mbuf_kva; + } } + + skb->dev = dev; + skb->protocol = eth_type_trans(skb, dev); + skb->ip_summed = CHECKSUM_UNNECESSARY; + + /* Call netif interface */ + netif_rx_ni(skb); + + /* Update statistics */ + kni->stats.rx_bytes += len; + kni->stats.rx_packets++; } /* Burst enqueue mbufs into free_q */ @@ -308,7 +328,7 @@ kni_net_rx_lo_fifo_skb(struct kni_dev *kni) /* Copy mbufs to sk buffer and then call tx interface */ for (i = 0; i < num; i++) { kva = (void *)va[i] - kni->mbuf_va + kni->mbuf_kva; - len = kva->data_len; + len = kva->pkt_len; data_kva = kva->buf_addr + kva->data_off - kni->mbuf_va + kni->mbuf_kva; @@ -329,20 +349,39 @@ kni_net_rx_lo_fifo_skb(struct kni_dev *kni) if (skb == NULL) { KNI_ERR("Out of mem, dropping pkts\n"); kni->stats.rx_dropped++; + continue; } - else { - /* Align IP on 16B boundary */ - skb_reserve(skb, 2); + + /* Align IP on 16B boundary */ + skb_reserve(skb, 2); + + if (kva->nb_segs == 1) { memcpy(skb_put(skb, len), data_kva, len); - skb->dev = dev; - skb->ip_summed = CHECKSUM_UNNECESSARY; + } else { + int nb_segs; + int kva_nb_segs = kva->nb_segs; - kni->stats.rx_bytes += len; - kni->stats.rx_packets++; + for (nb_segs = 0; nb_segs < kva_nb_segs; nb_segs++) { + memcpy(skb_put(skb, kva->data_len), + data_kva, kva->data_len); + + if (!kva->next) + break; - /* call tx interface */ - kni_net_tx(skb, dev); + kva = kva->next - kni->mbuf_va + kni->mbuf_kva; + data_kva = kva->buf_addr + kva->data_off + - kni->mbuf_va + kni->mbuf_kva; + } } + + skb->dev = dev; + skb->ip_summed = CHECKSUM_UNNECESSARY; + + kni->stats.rx_bytes += len; + kni->stats.rx_packets++; + + /* call tx interface */ + kni_net_tx(skb, dev); } /* enqueue all the mbufs from rx_q into free_q */