> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of
> miroslaw.walukiewicz at intel.com
> Sent: Monday, October 13, 2014 10:39 PM
> To: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH 1/3] pmd: add new flag to indicate TX TSO operation
> on the packet
>
> From: Miroslaw Walukiewicz <miroslaw.walukiewicz at intel.com>
>
> Transmission of TCP packets could be accelerated by HW Transmit Segmentation
> Offload. With TSO packets up to 64K could be transmismitted.
>
> When this flag is set the PMD drived will enable TCP segmentation.
>
> The new field tso_segsz is added to indicate how long is TCP TSO segment.
>
> Signed-off-by: Mirek Walukiewicz <miroslaw.walukiewicz at intel.com>
> ---
> lib/librte_mbuf/rte_mbuf.h | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h index
> ddadc21..63cbc36 100644
> --- a/lib/librte_mbuf/rte_mbuf.h
> +++ b/lib/librte_mbuf/rte_mbuf.h
> @@ -117,6 +117,9 @@ extern "C" {
> /* Use final bit of flags to indicate a control mbuf */
> #define CTRL_MBUF_FLAG (1ULL << 63) /**< Mbuf contains control data */
>
> +/* Bit 50 - TSO (TCP Transmit Segmenation Offload) */
> +#define PKT_TX_TCP_TSO (1ULL << 50) /**< Mbuf needs TSO enabling */
In VxLAN patch set [PATCH v5 7/8]i40e:support VxLAN Tx checksum offload, the
bit (1ULL << 50) in offload flag have already been used.
+#define PKT_TX_VXLAN_CKSUM (1ULL << 50) /**< TX checksum of VxLAN computed
by NIC */
> /**
> * Bit Mask to indicate what bits required for building TX context
> */
> @@ -196,6 +199,8 @@ struct rte_mbuf {
> uint16_t l2_len:7; /**< L2 (MAC) Header Length. */
> };
> };
> + /* field to support TSO segment size */
> + uint32_t tso_segsz;
> } __rte_cache_aligned;
>
> /**
