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Intel
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IXP400 Software
Buffer Management
April 2005 IXP400 Software Version 2.0 Programmer’s Guide
44 Document Number: 252539, Revision: 007
Figure 13. Internal Mapping of IX_MBUF to the Shared NPE Structure
3.5 IX_MBUF Structure
Table 1 and Table 2 present IX_MBUF structure format and details.
ix_next
ix_nextpkt
ix_data
ix_len
ix_rsvd
ix_len
ix_reserved
ix_type ix_flags
ixp_next
ixp_data
NPE Service Specific Field
ixp_len ixp_pkt_len
1st Cache
line of
IXP_BUF
NPE Service Specific Field
NPE Service Specific Field
NPE Service Specific Field
NPE Service Specific Field
Mapping from IX_MBUF to NPE Shared
Structure
2nd Cache
line of
IXP_BUF
Table 1. Internal IX_MBUF Field Format (Sheet 1 of 2)
0123
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