82583V Datasheet, PDF (233/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

Driver Programing Interface—82583V GbE Controller
9.2.5.2
DPF controls the DMA function of flow control packets addressed to the station address
(RAH/L[0]). If a packet is a valid flow control packet and is addressed to the station
address it is not DMA'd to host memory if DPF=1b.
PMCF controls the DMA function of MAC control frames (other than flow control). A MAC
control frame in this context must be addressed to either the MAC control frame
multicast address or the station address, match the type field and NOT match the
pause op-code of 0x0001. If PMCF=1b then frames meeting this criteria are DMA'd to
host memory.
The SECRC bit controls whether the hardware strips the Ethernet CRC from the
received packet. This stripping occurs prior to any checksum calculations. The stripped
CRC is not DMA'd to host memory and is not included in the length reported in the
descriptor.
Packet Split Receive Control Register - PSRCTL (0x02170; RW)
Note:
Field
BSIZE0
Rsv
BSIZE1
Rsv
BSIZE2
Rsv
BSIZE3
Rsv
Bit(s)
6:0
7
13:8
15:14
21:16
23:22
29:24
31:30
Initial
Value
0x2
0b
0x4
00b
0x4
00b
0x0
00b
Description
Receive Buffer Size for Buffer 0.
The value is in 128-byte resolution. Value can be from 128 bytes to
16256 bytes (15.875 KB). Default buffer size is 256 bytes. Software
should not program this field to a zero value.
Reserved
Should be written with 0b to ensure future compatibility.
Receive Buffer Size for Buffer 1.
The value is in 1 KB resolution. Value can be from 1 KB to 63 KB.
Default buffer size is 4 KB. Software should not program this field to a
zero value.
Reserved
Should be written with 00b to ensure future compatibility.
Receive Buffer Size for Buffer 2.
The value is in 1 KB resolution. Value can be from 1 KB to 63 KB.
Default buffer size is 4 KB. Software can program this field to any
value.
Reserved
Should be written with 00b to ensure future compatibility.
Receive Buffer Size for Buffer 3
The value is in 1 KB resolution. Value can be from 1 KB to 63 KB.
Default buffer size is 0 KB. Software can program this field to any
value.
Reserved
Should be written with 0b to ensure future compatibility.
If software sets a buffer size to zero, all buffers following that one must be set to zero
as well. Pointers in the receive descriptors to buffers with a zero size should be set to
null pointers.
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