From: Neil Horman <nhorman@tuxdriver.com>
To: Helin Zhang <helin.zhang@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [RFC 01/17] mbuf: add definitions of unified packet types
Date: Mon, 19 Jan 2015 11:33:06 -0500 [thread overview]
Message-ID: <20150119163306.GD21790@hmsreliant.think-freely.org> (raw)
In-Reply-To: <1421637803-17034-2-git-send-email-helin.zhang@intel.com>
On Mon, Jan 19, 2015 at 11:23:07AM +0800, Helin Zhang wrote:
> As there are only 6 bit flags in ol_flags for indicating packet types,
> which is not enough to describe all the possible packet types hardware
> can recognize. For example, i40e hardware can recognize more than 150
> packet types. Unified packet type is composed of tunnel type, L3 type,
> L4 type and inner L3 type fields, and can be stored in 16 bits mbuf
> field of 'packet_type'.
>
> Signed-off-by: Helin Zhang <helin.zhang@intel.com>
> Signed-off-by: Cunming Liang <cunming.liang@intel.com>
> Signed-off-by: Jijiang Liu <jijiang.liu@intel.com>
> ---
> lib/librte_mbuf/rte_mbuf.h | 68 ++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 68 insertions(+)
>
> diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
> index 16059c6..94eb38f 100644
> --- a/lib/librte_mbuf/rte_mbuf.h
> +++ b/lib/librte_mbuf/rte_mbuf.h
> @@ -165,6 +165,74 @@ extern "C" {
> /* Use final bit of flags to indicate a control mbuf */
> #define CTRL_MBUF_FLAG (1ULL << 63) /**< Mbuf contains control data */
>
> +/*
> + * Sixteen bits are divided into several fields to mark packet types. Note that
> + * each field is indexical.
> + * - Bit 3:0 is for tunnel types.
> + * - Bit 7:4 is for L3 or outer L3 (for tunneling case) types.
> + * - Bit 10:8 is for L4 types. It can also be used for inner L4 types for
> + * tunneling packets.
This seems a bit sparse, in that the protocol field is 8 bits wide in a packet.
There are several common protocls that you don't have listed, and you've already
exhausted your namespace with the list you have.
Neil
next prev parent reply other threads:[~2015-01-19 16:33 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-19 3:23 [dpdk-dev] [RFC 00/17] unified packet type Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 01/17] mbuf: add definitions of unified packet types Helin Zhang
2015-01-19 16:19 ` Ananyev, Konstantin
2015-01-20 3:47 ` Zhang, Helin
2015-01-19 16:33 ` Neil Horman [this message]
2015-01-19 17:27 ` Olivier MATZ
2015-01-19 18:15 ` Neil Horman
2015-01-20 2:28 ` Zhang, Helin
2015-01-20 9:53 ` Olivier MATZ
2015-01-19 3:23 ` [dpdk-dev] [RFC 02/17] e1000: support of unified packet type Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 03/17] ixgbe: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 04/17] " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 05/17] i40e: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 06/17] bond: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 07/17] enic: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 08/17] vmxnet3: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 09/17] app/test-pipeline: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 10/17] app/test-pmd: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 11/17] app/test: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 12/17] examples/ip_fragmentation: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 13/17] examples/ip_reassembly: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 14/17] examples/l3fwd-acl: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 15/17] examples/l3fwd-power: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 16/17] examples/l3fwd: " Helin Zhang
2015-01-19 3:23 ` [dpdk-dev] [RFC 17/17] mbuf: remove old packet type bit masks for ol_flags Helin Zhang
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