Intel Xeon L3406 CM80616005010AA 用户手册
产品代码
CM80616005010AA
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296
Datasheet, Volume 2
details IIO behavior for configuration requests from Intel QuickPath
Interconnect and peer-to-peer completions from Intel QuickPath Interconnect.
Notes:
1.
Note that when forwarding to DMI, Type 0 transaction with any device number is required to be forwarded
by IIO (unlike the standard PCI Express root ports)
2.
If a downstream port is a standard PCI Express root port, then PCI Express specification requires that all
non-zero-device numbered Type0 transactions are master aborted by the root port. If the downstream port
is non-legacy DMI, then Type 0 transaction with any device number is allowed/forwarded.
3.
Note that when forwarding to DMI, Type 0 transaction with any device number is required to be forwarded
by IIO (unlike the standard PCI Express root ports).
details IIO behavior when no target has been positively decoded for an
outgoing I/O transaction from Intel QuickPath Interconnect Inbound Address Decoding.
Table 5-6.
Decoding of Outbound Configuration Requests (from Processor or Peer-to-
Peer) from Intel
®
QuickPath Interconnect and Decoding of Outbound
Peer-to-Peer Completions from Intel QuickPath Interconnect
Address
Range
Conditions
IIO Behavior
Bus 0
Bus 0 and legacy IIO and device number
matches one of internal device numbers
Forward to that internal device.
Bus 0 and legacy IIO and device number does
NOT match one of IIO’s internal device
numbers
Forward to the downstream subtractive
decode port, that is, the legacy DMI port
If the transaction is a configuration request,
If the transaction is a configuration request,
the request is forwarded as a Type 0
1
configuration transaction to the subtractive
decode port
Bus 0 and NOT legacy IIO
Master Abort
Bus 1–255
Bus 1–255 and it matches the IIOBUSNO and
device number matches one of IIO’s internal
device numbers
Forward to that internal device.
Bus 1–255 and it matches the IIOBUSNO and
device number does NOT match any of IIO’s
internal device numbers
Master Abort
Bus 1–255 and it does not match the
IIOBUSNO but positively decodes to one of
the downstream PCIe ports
Forward to that port.
Configuration requests are forwarded as a
Configuration requests are forwarded as a
Type 0
2
(if bus number matches secondary
bus number of port) or a Type 1.
Bus 1–255 and it does not match the
IIOBUSNO and does not positively decode to
one of the downstream PCIe ports and DMI is
the subtractive decode port
Forward to DMI
3
.
Forward configuration request as Type 0/1,
depending on secondary bus number register
of the port.
Bus 1–255 and it does not match the
IIOBUSNO and does not positively decode to
one of the downstream PCIe ports and DMI is
not the subtractive decode port
Master Abort
Table 5-7.
Subtractive Decoding of Outbound I/O Requests from Intel
®
QuickPath
Interconnect
Address
Range
Conditions
IIO Behavior
Any I/O
address not
positively
decoded
No valid target decoded and one of the
downstream ports is the subtractive decode port
Forward to downstream subtractive
decode port
No valid target decoded and none of the
downstream ports is the subtractive decode port
Master Abort