Intel IXP400 manual Ixmbuf Structure, Internal Ixmbuf Field Format Sheet 1, Ixreserved

Intel® IXP400 Software

Buffer Management

Figure 13. Internal Mapping of IX_MBUF to the Shared NPE Structure

ix_next

ix_nextpkt

ix_data

ix_len

ix_type ix_flags ix_reserved

ix_rsvd

ix_len

M apping from IX_M BUF to NPE Shared

Structure

ixp_next

ixp_len ixp_pkt_len

ixp_data

NPE Service Specific Field

NPE Service Specific Field

NPE Service Specific Field

NPE Service Specific Field

NPE Service Specific Field

1st Cache

line of

IXP _BUF

2nd Cache

line of

IXP _BUF

3.5IX_MBUF Structure

Table 1 and Table 2 present IX_MBUF structure format and details.

Table 1. Internal IX_MBUF Field Format (Sheet 1 of 2)

	0	1	2		3
0	ix_next (IX_OSAL_MBUF_NEXT_BUFFER_IN_PKT_PTR)
4	ix_nextPacket (IX_OSAL_MBUF_NEXT_PKT_IN_CHAIN_PTR)
8		ix_data (IX_OSAL_MBUF_MDATA)
12		ix_len (IX_OSAL_MBUF_MLEN)
16	ix_type	ix_flags		ix_reserved

April 2005	IXP400 Software Version 2.0	Programmer’s Guide
44	Document Number: 252539, Revision: 007