Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Integrated I/O (IIO) Configuration Registers
190
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
14.1.4
PCI Vs. PCIe* Device / Function
PCI devices/functions do NOT have a PCIe* capability register set and do not decode 
offsets 100h and beyond. Accesses to 100h and beyond are master aborted by these 
devices. I/OxAPIC functions are PCI functions. All other functions in the IIO module are 
PCIe* functions and these have a PCIe* capability register set and also decode address 
offsets 100h and beyond.
14.2
Device 0 Function 0 DMI, Device 0 
Function 0 PCIe*, Device 2 Function 0-3 PCIe*, 
Device 3 Function 0-3 PCIe*
Intel Xeon processor E7-2800/4800/8800 v2 product family does not have Port 1 
(Device 1) and does not support Non Transparent Bridge (NTB) Mode. 
Device 0 Function 0 PCIe* Mode - Port 0 (X4)
Device 2 - Port 2 (X16)
Device 3 - Port 3 (X16)
Table 14-2. Function number of active root ports in port 2(Dev#2) based on port 
bifurcation
Port bifurcation
Function# of Active Root Port
15:12
11:8
7:4
3:0
x16
0
x8x8
2
0
x8x4x4
2
1
0
x4x4x8
3
2
0
x4x4x4x4
3
2
1
0
Table 14-3. Function number of active root ports in port 3(Dev#3) based on port 
bifurcation
Port bifurcation
Function# of active root port
15:12
11:8
7:4
3:0
x16
0
x8x8
2
0
x8x4x4
2
1
0
x4x4x8
3
2
0
x4x4x4x4
3
2
1
0
Register name
Offset
Size
Device 0 
function
Device 2 
function
Device 3 
function
VID
0x0
16
0
0 - 3
0 - 3
DID
0x2
16
0
0 - 3
0 - 3
PCICMD
0x4
16
0
0 - 3
0 - 3
PCISTS
0x6
16
0
0 - 3
0 - 3
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