> -----Original Message----- > From: Ananyev, Konstantin > Sent: Tuesday, January 20, 2015 12:20 AM > To: Zhang, Helin; dev at dpdk.org > Cc: Liang, Cunming; Liu, Jijiang > Subject: RE: [RFC 01/17] mbuf: add definitions of unified packet types > > > > > -----Original Message----- > > From: Zhang, Helin > > Sent: Monday, January 19, 2015 3:23 AM > > To: dev at dpdk.org > > Cc: Liang, Cunming; Liu, Jijiang; Ananyev, Konstantin; Zhang, Helin > > Subject: [RFC 01/17] mbuf: add definitions of unified packet types > > > > 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 at intel.com> > > Signed-off-by: Cunming Liang <cunming.liang at intel.com> > > Signed-off-by: Jijiang Liu <jijiang.liu at 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. > > + * - Bit 13:11 is for inner L3 types. > > + * - Bit 15:14 is reserved. > > + * > > + * To be compitable with Vector PMD, RTE_PTYPE_L3_IPV4, > > +RTE_PTYPE_L3_IPV4_EXT, > > + * RTE_PTYPE_L3_IPV6, RTE_PTYPE_L3_IPV6_EXT, RTE_PTYPE_L4_TCP, > > +RTE_PTYPE_L4_UDP > > + * and RTE_PTYPE_L4_SCTP should be kept as below in a contiguous 7 bits. > > + */ > > +#define RTE_PTYPE_UNKNOWN 0x0000 /* > 0b0000000000000000 */ > > +/* bit 3:0 for tunnel types */ > > +#define RTE_PTYPE_TUNNEL_IP 0x0001 /* > 0b0000000000000001 */ > > +#define RTE_PTYPE_TUNNEL_TCP 0x0002 /* > 0b0000000000000010 */ > > +#define RTE_PTYPE_TUNNEL_UDP 0x0003 /* > 0b0000000000000011 */ > > +#define RTE_PTYPE_TUNNEL_GRE 0x0004 /* > 0b0000000000000100 */ > > +#define RTE_PTYPE_TUNNEL_VXLAN 0x0005 /* > 0b0000000000000101 */ > > +#define RTE_PTYPE_TUNNEL_NVGRE 0x0006 /* > 0b0000000000000110 */ > > +#define RTE_PTYPE_TUNNEL_GENEVE 0x0007 /* > 0b0000000000000111 */ > > +#define RTE_PTYPE_TUNNEL_GRENAT 0x0008 /* > 0b0000000000001000 */ > > +#define RTE_PTYPE_TUNNEL_GRENAT_MAC 0x0009 /* > 0b0000000000001001 */ > > +#define RTE_PTYPE_TUNNEL_GRENAT_MACVLAN 0x000a /* > 0b0000000000001010 */ > > +#define RTE_PTYPE_TUNNEL_MASK 0x000f /* > 0b0000000000001111 */ > > +/* bit 7:4 for L3 types */ > > +#define RTE_PTYPE_L3_IPV4 0x0010 /* > 0b0000000000010000 */ > > +#define RTE_PTYPE_L3_IPV4_EXT 0x0030 /* > 0b0000000000110000 */ > > +#define RTE_PTYPE_L3_IPV6 0x0040 /* > 0b0000000001000000 */ > > +#define RTE_PTYPE_L3_IPV6_EXT 0x00c0 /* > 0b0000000011000000 */ > > +#define RTE_PTYPE_L3_IPV4_EXT_UNKNOWN 0x00d0 /* > 0b0000000011010000 */ > > +#define RTE_PTYPE_L3_IPV6_EXT_UNKNOWN 0x00e0 /* > 0b0000000011100000 */ > > +#define RTE_PTYPE_L3_MASK 0x00f0 /* > 0b0000000011110000 */ > > I still think it would be better to use enum not bit-set for IPv4/IPv6 > distinction, > but if you set it that way, can you at least take advantage of it and make > RTE_ETH_IS_IPV4_HDR() not require 3 comparisons? > I think it is doable if you set bit 4 for IPv4 types only (you already do > that) and bit > 6 for IPv6 types only. > For that, I think, you can make RTE_PTYPE_L3_IPV4_EXT_UNKNOWN == 0xb0 > /* 0b0000000010110000 */ Then you can: > > #define RTE_ETH_IS_IPV4_HDR(ptype) (((ptype) & > RTE_PTYPE_L3_IPV4) != 0) > #define RTE_ETH_IS_IPV6_HDR(ptype) (((ptype) & > RTE_PTYPE_L3_IPV6) != 0) > > I suppose that would be faster then what you propose below, and would > probably require less changes in our sample apps. As waste of one bit can support Vector PMD well, I prefer to have it here. Thank you very much for the good idea of bit selection, to get possible higher performance. I will add the idea in the next version. Thanks a lot!
Regards, Helin > > Konstantin > > > +/* bit 10:8 for L4 types */ > > +#define RTE_PTYPE_L4_TCP 0x0100 /* > 0b0000000100000000 */ > > +#define RTE_PTYPE_L4_UDP 0x0200 /* > 0b0000001000000000 */ > > +#define RTE_PTYPE_L4_FRAG 0x0300 /* > 0b0000001100000000 */ > > +#define RTE_PTYPE_L4_SCTP 0x0400 /* > 0b0000010000000000 */ > > +#define RTE_PTYPE_L4_ICMP 0x0500 /* > 0b0000010100000000 */ > > +#define RTE_PTYPE_L4_NONFRAG 0x0600 /* > 0b0000011000000000 */ > > +#define RTE_PTYPE_L4_MASK 0x0700 /* > 0b0000011100000000 */ > > +/* bit 13:11 for inner L3 types */ > > +#define RTE_PTYPE_INNER_L3_IPV4 0x0800 /* > 0b0000100000000000 */ > > +#define RTE_PTYPE_INNER_L3_IPV4_EXT 0x1000 /* > 0b0001000000000000 */ > > +#define RTE_PTYPE_INNER_L3_IPV6 0x1800 /* > 0b0001100000000000 */ > > +#define RTE_PTYPE_INNER_L3_IPV6_EXT 0x2000 /* > 0b0010000000000000 */ > > +#define RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN 0x2800 /* > > +0b0010100000000000 */ #define > RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN 0x3000 /* 0b0011000000000000 > */ > > +#define RTE_PTYPE_INNER_L3_MASK 0x3800 /* > 0b0011100000000000 */ > > +/* bit 15:14 reserved */ > > + > > +/* Check if the (outer) L3 header is IPv4 */ #define > > +RTE_ETH_IS_IPV4_HDR(ptype) \ > > + (((ptype) & RTE_PTYPE_L3_MASK) == RTE_PTYPE_L3_IPV4 || \ > > + ((ptype) & RTE_PTYPE_L3_MASK) == RTE_PTYPE_L3_IPV4_EXT || \ > > + ((ptype) & RTE_PTYPE_L3_MASK) == > RTE_PTYPE_L3_IPV4_EXT_UNKNOWN) > > + > > +/* Check if the (outer) L3 header is IPv6 */ #define > > +RTE_ETH_IS_IPV6_HDR(ptype) \ > > + (((ptype) & RTE_PTYPE_L3_MASK) == RTE_PTYPE_L3_IPV6 || \ > > + ((ptype) & RTE_PTYPE_L3_MASK) == RTE_PTYPE_L3_IPV6_EXT || \ > > + ((ptype) & RTE_PTYPE_L3_MASK) == > RTE_PTYPE_L3_IPV6_EXT_UNKNOWN) > > + > > +/* Check if it is a tunneling packet */ #define > > +RTE_ETH_IS_TUNNEL_PKT(ptype) ((ptype) & RTE_PTYPE_TUNNEL_MASK) > > + > > /** > > * Get the name of a RX offload flag > > * > > -- > > 1.8.1.4