82598EB Datasheet, PDF (95/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - PCIe
27:26
RO
31:28
RO
00b
0000b
Slot Power Limit Scale. Used in upstream ports only. Hardwired in the 82598 to 0b for all
functions.
Reserved.
Device Control – 2 Byte, Offset 0xA8, (RW) – This register controls the PCIe specific parameters. Note
that there is a dedicated register per each function.
Bits
0
1
2
3
4
7:5
9:8
10
11
14:12
15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
Default
0b
0b
0b
0b
1b
000b
(128
bytes)
00b
0b
1b
010b
0b
Description
Correctable Error Reporting Enable. Enable error report.
Non-Fatal Error Reporting Enable. Enable error report.
Fatal Error Reporting Enable. Enable error report.
Unsupported Request Reporting Enable. Enable error report.
Enable Relaxed Ordering. If this bit is set, the 82598 is permitted to set the Relaxed
Ordering bit in the attribute field of write transactions that do not need strong ordering.
Refer to the CTRL_EXT register bit RO_DIS for more details.
Max Payload Size. This field sets the maximum TLP payload size for the 82598 functions.
As a receiver, the 82598 must handle TLPs as large as the set value. As a transmitter, the
82598 must not generate TLPs exceeding the set value.
The Max Payload Size field supported in the Device Capabilities register indicates
permissible values that can be programmed.
Reserved, should be set to 00b.
Auxiliary Power PM Enable. When set, enables the 82598 to draw AUX power
independent of PME AUX power. the 82598 is a multi-function device, therefore allowed
to draw AUX power if at least one of the functions has this bit set.
Enable No Snoop. Snoop is gated by Non-Snoop bits in the GCR register in the CSR
space.
Max Read Request Size. This field sets maximum read request size for the 82598 as a
requester.
000b = 128 bytes.
001b = 256 bytes.
010b = 512 bytes.
011b = 1 kB.
100b = 2 kB.
101b = Reserved.
110b = Reserved.
111b = Reserved.
Reserved.
Note: The 82598 does not issue read requests greater than 256 bytes.
Device Status – 2 Byte, Offset 0xAA, (RO) – This register provides information about PCIe device
specific parameters. Note that there is a dedicated register per each function.
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