82576EB Datasheet, PDF (18/34 Pages) Intel Corporation – LAN Access Division

Specification Changes - Intel^® 82576EB GbE Controller
2. PCIe: Device Control 2 Register Should Not Be Written While DMA Is Enabled
Change:
The Device Control 2 Register should only be written during initialization. When a port is
enabled to transmit or receive data, this register should not be written even if the value is
not changed.
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3. Updates to PXE/iSCSI EEPROM Words
Change:
For Gigabit Main Setup Options Word 0x30, 0x34; bits 2:0 and bit 5 are now defined as
indicated in the table below.
Bit(s)
15:7
5
4:3
2:0
Value
Port Status
CLP(Combo)
Executes
iSCSI Boot Option ROM
CTRL-D Menu
FCoE Boot Option ROM
CTRL-D Menu
Same as before. No change.
Bit 5, formerly used to indicate iSCSI enable / disable, is no longer valid and is not checked by software.
Same as before. No change.
5-7
Reserved.
Same as Disabled.
4
FCoE
FCOE
• Displays port as FCoE.
• Allows changing to port to
Boot Disabled, iSCSI
Primary or Secondary
• Displays port as FCoE.
• Allows changing to Boot
Disabled
3
iSCSI
Secondary
iSCSI
• Displays port as iSCSI
Secondary.
• Allows changing to Boot
Disabled, iSCSI Primary
• Displays port as iSCSI.
• Allows changing to Boot
Disabled, FCoE enabled
2
iSCSI
Primary
iSCSI
• Displays port as iSCSI
Primary.
• Allows changing to Boot
Disabled, iSCSI Secondary
• Displays port as iSCSI.
• Allows changing to Boot
Disabled, FCoE enabled
1
Boot Disabled NONE
• Displays port as Disabled.
• Allows changing to iSCSI
Primary/Secondary
• Displays port as Disabled.
• Allows changing to FCoE
enabled
0
PXE
PXE
• Displays port as PXE.
• Allows changing to Boot
Disabled, iSCSI Primary or
Secondary
• Displays port as PXE.
• Allows changing to Boot
Disabled, FCoE enabled
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Intel^® 82576EB GbE Controller
Specification Update
18
Revision: 2.85
September 2012