diff options
Diffstat (limited to 'dpdk/dpdk-16.04_patches/0011-enic-fix-misalignment-of-Rx-mbuf-data.patch')
| -rw-r--r-- | dpdk/dpdk-16.04_patches/0011-enic-fix-misalignment-of-Rx-mbuf-data.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/dpdk/dpdk-16.04_patches/0011-enic-fix-misalignment-of-Rx-mbuf-data.patch b/dpdk/dpdk-16.04_patches/0011-enic-fix-misalignment-of-Rx-mbuf-data.patch new file mode 100644 index 00000000000..69ca3f31087 --- /dev/null +++ b/dpdk/dpdk-16.04_patches/0011-enic-fix-misalignment-of-Rx-mbuf-data.patch @@ -0,0 +1,55 @@ +From 454eb71eca1912e32a509c738a99a340cc2488cf Mon Sep 17 00:00:00 2001 +From: John Daley <johndale@cisco.com> +Date: Mon, 25 Apr 2016 16:24:53 -0700 +Subject: [PATCH 2/3] enic: fix misalignment of Rx mbuf data + +Data DMA used m->data_off of uninitialized mbufs instead of +RTE_PKTMBUF_HEADROOM, potentially causing Rx data to be +placed at the wrong alignment in the mbuf. + +Fixes: 947d860c821f ("enic: improve Rx performance") +Signed-off-by: John Daley <johndale@cisco.com> +--- + drivers/net/enic/enic_main.c | 5 +++-- + drivers/net/enic/enic_rx.c | 6 ++++-- + 2 files changed, 7 insertions(+), 4 deletions(-) + +diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c +index be4e9e5..646d87f 100644 +--- a/drivers/net/enic/enic_main.c ++++ b/drivers/net/enic/enic_main.c +@@ -354,10 +354,11 @@ enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq) + return -ENOMEM; + } + +- dma_addr = (dma_addr_t)(mb->buf_physaddr + mb->data_off); ++ dma_addr = (dma_addr_t)(mb->buf_physaddr ++ + RTE_PKTMBUF_HEADROOM); + + rq_enet_desc_enc(rqd, dma_addr, RQ_ENET_TYPE_ONLY_SOP, +- mb->buf_len); ++ mb->buf_len - RTE_PKTMBUF_HEADROOM); + rq->mbuf_ring[i] = mb; + } + +diff --git a/drivers/net/enic/enic_rx.c b/drivers/net/enic/enic_rx.c +index 232987a..39bb55c 100644 +--- a/drivers/net/enic/enic_rx.c ++++ b/drivers/net/enic/enic_rx.c +@@ -314,9 +314,11 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, + + rx_id); + + /* Push descriptor for newly allocated mbuf */ +- dma_addr = (dma_addr_t)(nmb->buf_physaddr + nmb->data_off); ++ dma_addr = (dma_addr_t)(nmb->buf_physaddr ++ + RTE_PKTMBUF_HEADROOM); + rqd_ptr->address = rte_cpu_to_le_64(dma_addr); +- rqd_ptr->length_type = cpu_to_le16(nmb->buf_len); ++ rqd_ptr->length_type = cpu_to_le16(nmb->buf_len ++ - RTE_PKTMBUF_HEADROOM); + + /* Fill in the rest of the mbuf */ + rxmb->data_off = RTE_PKTMBUF_HEADROOM; +-- +2.7.0 + |