82583V Datasheet, PDF (231/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

Driver Programing Interface—82583V GbE Controller
Field
LBM
RDMTS
DTYP
MO
Reserved
BAM
BSIZE
VFE
CFIEN
CFI
Bit(s)
7:6
9:8
11:10
13:12
14
15
Initial
Value
00b
00b
00b
00b
0b
0b
Description
Loopback mode
Should always be set to 00b.
00b = Normal operation (or PHY loopback in GMII/MII mode).
01b = MAC Loopback (test mode).
10b = Undefined.
11b = Undefined.
Receive Descriptor Minimum Threshold Size
The corresponding interrupt is set whenever the fractional number of
free descriptors becomes equal to RDMTS. Table 50 lists which
fractional values correspond to RDMTS values. See Section 9.2.5.7 for
details regarding RDLEN.
Descriptor Type
00b = Legacy descriptor type.
01b = Packet split descriptor type.
10b = Reserved.
11b = Reserved.
Multicast Offset
This determines which bits of the incoming multicast address are used
in looking up the bit vector.
00b = [47:36].
01b = [46:35].
10b = [45:34].
11b = [43:32].
Reserved
Broadcast Accept Mode
0b = Ignore broadcast packets (unless they pass through exact or
imperfect filters).
1b = Accept broadcast packets.
Receive Buffer Size
If RCTL.BSEX = 0b:
00b = 2048 bytes.
01b = 1024 bytes.
10b = 512 bytes.
11b = 256 bytes.
17:16
0b
18
0b
19
0b
20
0b
If RCTL.BSEX = 1b:
00b = reserved; software should not set to this value.
01b = 16384 bytes.
10b = 8192 bytes.
11b = 4096 bytes.
BSIZE is only used when DTYP = 00b. When DTYP = 01b, the buffer
sizes for the descriptor are controlled by fields in the PSRCTL register.
BSIZE is not relevant when FLXBUF is different from 0x0, in that case,
FLXBUF determines the buffer size.
VLAN Filter Enable.
0b = Disabled (filter table does not decide packet acceptance).
1b = Enabled (filter table decides packet acceptance for 802.1Q
packets).
Canonical Form Indicator Enable
0b = Disabled (CFI bit not compared to decide packet acceptance).
1b = Enabled (CFI from packet must match next field to accept
802.1Q packets).
Canonical Form Indicator Bit Value
If CFI is set, then 802.1Q packets with CFI equal to this field are
accepted; otherwise, the 802.1Q packet is discarded.
231