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Manageability Filters Valid - MFVAL (5824h; R/W) — Intel
®
82575EB Gigabit Ethernet Controller
324632-003 Intel
®
82575EB Gigabit Ethernet Controller
Revision: 2.1 Software Developer’s Manual and EEPROM Guide
January 2011 393
14.7.4 Manageability Filters Valid - MFVAL (5824h; R/
W)
The manageability filters valid registers indicate which filter registers contain a valid entry.
Reset - The MFVAL register is cleared on an Internal_Power_On_Reset and firmware reset.
The initial values for this register can be loaded from the EEPROM after an Internal_Power_On_Reset or
firmware reset. The MFVAL register is written by the BMC and is not accessible to the host for writing.
Reserved 22 0b Reserved.
EN_XSUM_FILTER 23 0b Enable Xsum Filtering to Manageability
When set, only packets that pass L3 and L4 checksums are send to the
manageability block.
Hardware does not calculate the checksum of packets whose L2 + L3 header is
bigger than 256 bytes. The BMC should take care of the checksum check of such
packets.
EN_IPv4_FILTER 24 0b Enable IPv4 address Filters
When set, the last 128 bits of the MIPAF register are used to store four IPv4
addresses for IPv4 filtering. When cleared, these bits store a single IPv6 filter.
FIXED_NET_TYPE 25 0b Fixed Next Type
If set, only packets matching the net type defined by the NET_TYPE field pass to
manageability. Otherwise, both tagged and un-tagged packet can be forwarded
to manageability engine.
NET_TYPE 26 0b Net Type
0b = Pass only un-tagged packets.
1b = Pass only VLAN tagged packets.
Valid only if FIXED_NET_TYPE is set.
Reserved 31:27 00h Reserved.
Field Bits
Initial
Value
Description
MAC 3:0 00h
1
1. Loaded from the EEPROM.
MAC
Indicates that if the MAC unicast filter registers (MMAH, MMAL) contain valid MAC
addresses. Bit 0 corresponds to filter 0, etc.
Reserved 7:4 00h
1
Reserved.
VLAN 15:8 00h
1
VLAN
Indicates that if the VLAN filter registers (MAVTV) contain valid VLAN tags. Bit 8
corresponds to filter 0, etc.
IPv4 19:16 00h
1
IPv4
Indicates that if the IPv4 address filters (MIPAF) contain valid IPv4 addresses. Bit 16
corresponds to IPv4 address 0. These bits apply only when IPv4 address filters are
enabled (MANC.EN_IPv4_FILTER=1b)
Reserved 23:20 00h
1
Reserved.
IPv6 27:24 00h
1
IPv6
Indicates that if the IPv6 address filter registers (MIPAF) contain valid IPv6 addresses. Bit
24 corresponds to address 0, etc. Bit 27 (filter 3) applies only when the IPv4 address
filters are not enabled (MANC.EN_IPv4_FILTER=0b).
Reserved 31:28 00h
1
Reserved.