I/O Root Complex Connections - Oracle SPARC T7-2 Service Manual

I/O Root Complex Connections

SPARC T7 servers use a dedicated chip (IO Hub) to host the PCIe fabric. Each IOH chip has
five root complexes, four are sixteen lanes wide (x16), and one is eight lanes wide (x8). The
root complexes are divided up and assigned to all of the I/O devices in the server. The SPARC
T7-2 server contains two IOH chips. Each IOH chip connects to four of the PCIe slots. The
following table describes the device paths for the server.
The pci@ values reported in the OpenBoot show-devs command output are paths in the I/O root
complex topology.
Device
Name
PCIeSlot1
PCIeSlot2
PCIeSlot3
PCIeSlot4
PCIeSlot5
PCIeSlot6
PCIeSlot7
PCIeSlot8
NET0
NET1
NET2
NET3
SAS0
SAS1
SPM
USB
RCDROM
CDROM
eUSB
USB - Rear Top
USB - Rear Bottom
USB - Front Left
IOH Root Width Root Complex Path
Complex
(IOS)
0 3 x16
/pci@306/pci@1
0 2 x16
/pci@307/pci@1
0 1 x8
/pci@300/pci@2
0 0 x8
/pci@301/pci@2
1 3 x8
/pci@302/pci@2
1 0 x8
/pci@303/pci@2
1 2 x16
/pci@304/pci@1
1 1 x16
/pci@305/pci@1
0 1 x8
/pci@300/pci@1/network@0
0 1 x8
/pci@300/pci@1/network@0,1
1 3 x8
/pci@302/pci@1/network@0
1 3 x8
/pci@302/pci@1/network@0,1
0 0 x8
/pci@301/pci@1
1 0 x8
/pci@303/pci@1
0 4 1x of
/pci@309/pci@1
x4
1 4 x4
/pci@308/pci@1
1 4 x1
/pci@308pci@1/usb@0/hub@1/storage@1/disk@0
1 4 x1
/pci@308/pci@1/usb@0/hub@5/device@4/storage@0
1 4 x1
/pci@308/pci@1/usb@0/hub@1/storage@3
1 4 x1
/pci@308/pci@1/usb@0/storage@7
1 4 x1
/pci@308/pci@1/usb@0/storage@2
1 4 x1
/pci@308/pci@1/usb@0/hub@4/storage@2
I/O Root Complex Connections
Oracle ILOM
Target
/SYS/MB/PCIE1
/SYS/MB/PCIE2
/SYS/MB/PCIE3
/SYS/MB/PCIE4
/SYS/MB/PCIE5
/SYS/MB/PCIE6
/SYS/MB/PCIE7
/SYS/MB/PCIE8
/SYS/MB/NET0
/SYS/MB/NET1
/SYS/MB/NET2
/SYS/MB/NET3
/SYS/MB/SASHBA0
/SYS/MB/SASHBA1
/SYS/MB/SPM
/SYS/MB/USB_CTRL
/SYS/MB/USB_CTRL
/SYS/MB/USB_CTRL
/SYS/MB/USB_CTRL
/SYS/MB/USB_CTRL
/SYS/MB/USB_CTRL
/SYS/MB/USB_CTRL
Servicing PCIe Cards 127