Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
239
Datasheet Volume Two: Functional Description, February 2014
Integrated I/O (IIO) Configuration Registers
14.2.56 LNKCAP2
PCI Express Link Capabilities 2.
4:4
RW_V (Device 2 and 3 
Function 0)
RW (Device 0 
Function0, Device 2 
and 3 Function 1-3)
0x0
0x1 (Device 0 
Function 0)
compltodis:
Completion Timeout Disable  
When set to 1b, this bit disables the Completion Timeout 
mechanism for all NP tx that IIO issues on the PCIe/DMI 
link. 
When 0b, completion timeout is enabled. Software can 
change this field while there is active traffic in the 
root/DMI port.
3:0
RW_V (Device 2 and 3 
Function 0)
RW (Device 0 
Function0, Device 2 
and 3 Function 1-3)
0x0
compltoval:
Completion Timeout Value on NP Tx that IIO issues on 
PCIe/DMI  
In Devices that support Completion Timeout 
programmability, this field allows system software to 
modify the Completion Timeout range. The following 
encodings and corresponding timeout ranges are defined:
0000b = 10 ms to 50 ms
0001b = Reserved (IIO aliases to 0000b)
0010b = Reserved (IIO aliases to 0000b)
0101b = 16 ms to 55 ms
0110b = 65 ms to 210 ms
1001b = 260 ms to 900 ms
1010b = 1 s to 3.5 s
1101b = 4 s to 13 s
1110b = 17 s to 64 s
When software selects 17 s to 64 s range, CTOCTRL 
further controls the timeout value within that range. For 
all other ranges selected by OS, the timeout value within 
that range is fixed in IIO hardware.
Software can change this field while there is active traffic 
in the root port.
This value will also be used to control PME_TO_ACK 
Timeout. That is this field sets the timeout value for 
receiving a PME_TO_ACK message after a PME_TURN_OFF 
message has been transmitted. The PME_TO_ACK Timeout 
has meaning only if bit 6 of MISCCTRLSTS register is set 
to a 1b.
Type:
CFG
PortID:
N/A
Bus:
0
Device:
0Function:0 (DMI2 Mode)
Offset: 0xf8
Bus:
0
Device:
0Function:0 (PCIe* Mode)
Bus:
0
Device:
2Function:0-3
Bus:
0
Device:
3Function:0-3
Offset:
0xb8
Bit
Attr
Default
Description
Type:
CFG
PortID:
N/A
Bus:
0
Device:
0Function:0
Bus:
0
Device:
2Function:0-3
Bus:
0
Device:
3Function:0-3
Offset:
0xbc
Bit
Attr
Default
Description
31:8
RV
-
Reserved.
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