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Intel
®
82575EB Gigabit Ethernet Controller — PCIe* Control - GCR (05B00h; R)
Intel
®
82575EB Gigabit Ethernet Controller 324632-003
Software Developer’s Manual and EEPROM Guide Revision: 2.1
402 January 2011
Completion_
Timeout_Value
(RO or RW1)
15:12 0h Indicates the selected value for completion timeout (after an
Internal_Power_On_Reset).
Decoding of this field depends on the PCIe* capability version:
Capability version = 1 (bits 13:12):
00b = 50 s to 10 ms (default)
01b = 10 ms to 200 ms
10b = 200 ms to 4 s
11b = 4 s to 64 s
Bits 15:14 are reserved
Capability version = 2:
0000b = 50 s to 50 ms
0001b = 50 s to 100 s
0010b = 1 ms to 10 ms
0011b = Reserved
0100b = Reserved
0101b = 16 ms to 55 ms
0110b = 65 ms to 210 ms
0111b = Reserved
1000b = Reserved
1001b = 260 ms to 900 ms
1010b = 1 s to 3.5 s
1011b = Reserved
1100b = Reserved
1101b = 4 s to 13 s
1110b = 17 s to 64 s
1111b = Reserved
Reserved 11:10 00b Reserved
Rx_L0s_Adjustme
nt
9 1b If set, the replay timer always adds the required L0s adjustment (after an
Internal_Power_On_Reset).
When set to 0b, adds it only when Tx L0s are active (after an
Internal_Power_On_Reset).
FW
Self_Test_Enable
8 0b When set, firmware should perform a self test (after an Internal_Power_On_Reset).
Reserved 7:3 0h Reserved
CBDE (RO) 2 0b Data Movement Engine Transfer Enabled
Reflects the transfer enable bit received from the CB_RESPONSE message.
Field Bit(s) Initial
Value
Description
CBA (RO) 1 0b Data Movement Engine Active
This bit is set to 1b following reception of the response VDM sent by the data
movement engine.
If the I/OAT fuse is fused out, then this bit remains reset to 0b.
CBDB (WO) 0 0b Data Movement Engine Doorbell
This bit is used by the software device driver to trigger sending the data movement
engine.