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.
|
|
|
|
|
|
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PCIeSlot1
|
0
|
3
|
x16
|
/pci@306/pci@1
|
/SYS/MB/PCIE1
|
|
PCIeSlot2
|
0
|
2
|
x16
|
/pci@307/pci@1
|
/SYS/MB/PCIE2
|
|
PCIeSlot3
|
0
|
1
|
x8
|
/pci@300/pci@2
|
/SYS/MB/PCIE3
|
|
PCIeSlot4
|
0
|
0
|
x8
|
/pci@301/pci@2
|
/SYS/MB/PCIE4
|
|
PCIeSlot5
|
1
|
3
|
x8
|
/pci@302/pci@2
|
/SYS/MB/PCIE5
|
|
PCIeSlot6
|
1
|
0
|
x8
|
/pci@303/pci@2
|
/SYS/MB/PCIE6
|
|
PCIeSlot7
|
1
|
2
|
x16
|
/pci@304/pci@1
|
/SYS/MB/PCIE7
|
|
PCIeSlot8
|
1
|
1
|
x16
|
/pci@305/pci@1
|
/SYS/MB/PCIE8
|
|
NET0
|
0
|
1
|
x8
|
/pci@300/pci@1/network@0
|
/SYS/MB/NET0
|
|
NET1
|
0
|
1
|
x8
|
/pci@300/pci@1/network@0,1
|
/SYS/MB/NET1
|
|
NET2
|
1
|
3
|
x8
|
/pci@302/pci@1/network@0
|
/SYS/MB/NET2
|
|
NET3
|
1
|
3
|
x8
|
/pci@302/pci@1/network@0,1
|
/SYS/MB/NET3
|
|
SAS0
|
0
|
0
|
x8
|
/pci@301/pci@1
|
/SYS/MB/SASHBA0
|
|
SAS1
|
1
|
0
|
x8
|
/pci@303/pci@1
|
/SYS/MB/SASHBA1
|
|
SPM
|
0
|
4
|
1x of x4
|
/pci@309/pci@1
|
/SYS/MB/SPM
|
|
USB
|
1
|
4
|
x4
|
/pci@308/pci@1
|
/SYS/MB/USB_CTRL
|
|
RCDROM
|
1
|
4
|
x1
|
/pci@308pci@1/usb@0/hub@1/storage@1/disk@0
|
/SYS/MB/USB_CTRL
|
|
CDROM
|
1
|
4
|
x1
|
/pci@308/pci@1/usb@0/hub@5/device@4/storage@0
|
/SYS/MB/USB_CTRL
|
|
eUSB
|
1
|
4
|
x1
|
/pci@308/pci@1/usb@0/hub@1/storage@3
|
/SYS/MB/USB_CTRL
|
|
USB - Rear Top
|
1
|
4
|
x1
|
/pci@308/pci@1/usb@0/storage@7
|
/SYS/MB/USB_CTRL
|
|
USB - Rear Bottom
|
1
|
4
|
x1
|
/pci@308/pci@1/usb@0/storage@2
|
/SYS/MB/USB_CTRL
|
|
USB - Front Left
|
1
|
4
|
x1
|
/pci@308/pci@1/usb@0/hub@4/storage@2
|
/SYS/MB/USB_CTRL
|
|
USB - Front Right
|
1
|
4
|
x1
|
/pci@308/pci@1/usb@0/hub@4/storage@1
|
/SYS/MB/USB_CTRL
|
|
HDD0
|
0
|
0
|
x4
|
/pci@301/pci@1/scsi@0/disk@p0
|
/SYS/DBP/HDD0
|
|
HDD1
|
0
|
0
|
x4
|
/pci@301/pci@1/scsi@0/disk@p1
|
/SYS/DBP/HDD1
|
|
HDD2
|
0
|
0
|
x4
|
/pci@301/pci@1/scsi@0/disk@p2
|
/SYS/DBP/HDD2
|
|
HDD3
|
0
|
0
|
x4
|
/pci@301/pci@1/scsi@0/disk@p3
|
/SYS/DBP/HDD3
|
|
HDD4
|
1
|
0
|
x4
|
/pci@303/pci@1/scsi@0/disk@p0
|
/SYS/DBP/HDD4
|
|
HDD5
|
1
|
0
|
x4
|
/pci@303/pci@1/scsi@0/disk@p1
|
/SYS/DBP/HDD5
|
|
NVMe0
Single NMVe card (Slot 1)
Single NVMe Card (Slot 2)
Dual NVMe Switch Cards
|
0
|
0
|
x4
|
/pci@306/pci@1/pci@0/pci@4/nvme@0/disk@1
/pci@307/pci@1/pci@0/pci@4/nvme@0/disk@1
/pci@306/pci@1/pci@0/pci@6/nvme@0/disk@1
|
|
|
NVMe1
Single NMVe card (Slot 1)
Single NVMe Card (Slot 2)
Dual NVMe Switch Cards
|
0
|
0
|
x4
|
/pci@306/pci@1/pci@0/pci@5/nvme@0/disk@1
/pci@307/pci@1/pci@0/pci@5/nvme@0/disk@1
/pci@306/pci@1/pci@0/pci@7/nvme@0/disk@1
|
|
|
NVMe2
Single NMVe card (Slot 1)
Single NVMe Card (Slot 2)
Dual NVMe Switch Cards
|
1
|
0
|
x4
|
/pci@306/pci@1/pci@0/pci@6/nvme@0/disk@1
/pci@307/pci@1/pci@0/pci@6/nvme@0/disk@1
/pci@307/pci@1/pci@0/pci@6/nvme@0/disk@1
|
|
|
NVME3
Single NMVe card (Slot 1)
Single NVMe Card (Slot 2)
Dual NVMe Switch Cards
|
1
|
0
|
x4
|
/pci@306/pci@1/pci@0/pci@7/nvme@0/disk@1
/pci@307/pci@1/pci@0/pci@7/nvme@0/disk@1
/pci@307/pci@1/pci@0/pci@7/nvme@0/disk@1
|
|
|