I/O Root Complex Connections - Oracle SPARC T5-2 Service Manual

I/O Root Complex Connections

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Related Information
"I/O Root Complex Connections" on page 122
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"Rear Panel Components (Service)" on page 15
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"Remove a PCIe Card or Filler Panel" on page 123
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"Install a PCIe Card or Filler Panel" on page 126
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I/O Root Complex Connections
On the 2-processor server, each CPU connects to four of the PCIe slots. Each PCIe slot also
uses a specific I/O subsystem (IOS0 or IOS1) and PCIe Switch (0 or 1)
CPU0, IOS1, and PCIe Switch 0 connect to slot 1.
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CPU0, IOS0, and PCIe Switch 1 connect to slots 5, 6, and 7.
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CPU1, IOS1, and PCIe Switch 0 connect to slots 2, 3, and 4.
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CPU1, IOS0, and PCIe Switch 1 connect to slot 8.
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On the 1-processor server, the single CPU connects to all eight of the PCIe slots. Each PCIe slot
uses a specific I/O subsystem (IOS0 or IOS1) and PCIe Switch (0 or 1)
CPU0, IOS1, and PCIe Switch 0 connect to slot 1, 2, 3, and 4.
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CPU0, IOS0, and PCIe Switch 1 connect to slots 5, 6, 7, and 8.
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Note -
processor and 1-processor servers, see
The pci@ values reported in the OpenBoot show-devs command output are paths in the I/O root
complex topology. The values are different for the 2-processor and 1-processor servers.
2-processor server root complex paths:
PCIe
Slot
1
2
122 SPARC T5-2 Server Service Manual • February 2017
Fill the PCIe slots in this sequence: 1, 8, 2, 7, 3, 6, 4, 5.
Place the cards in this order: Expansion cards, storage cards, network cards, other cards.
For diagrams showing connections between PCIe slots and root complexes for the 2-
CPU IOS PCIe
Switch
0 1 0
1 1 0
"System Schematic" on page
Root Complex Path
/pci@300/pci@1/pci@0/pci@4
/pci@380/pci@1/pci@0/pci@5
25.
Oracle ILOM Target
/SYS/MB/PCIE1
/SYS/MB/PCIE2