PCIe Expansion System User's Manual

MAGMA

For example, below is showing the Magma Chassis on Bus 7, Device 0,

Function 0. Some information has been deleted, but notice the Link

Supported Speed is 2.5 Gb/s, Width x8 . This is helpful to know that the

chassis is configured for x8 PCI Express Speeds highlighted in red.

07:00.0 PCI bridge: Integrated Device Technology, Inc.

Unknown device 8037 (prog-if 00 [Normal decode])

Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV-

Status: Cap+ 66MHz- UDF- FastB2B- ParErr-

Latency: 0, Cache Line Size: 64 bytes

Device: MaxPayload 256 bytes, MaxReadReq 128 bytes

Link: Supported Speed 2.5Gb/s, Width x8, ASPM L0s

L1, Port 0

Link: Latency L0s <512ns, L1 <4us

Link: ASPM Disabled CommClk+ ExtSynch-

Link: Speed 2.5Gb/s, Width x8

Capabilities: [c0] Power Management version 3

Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA

PME(D0+,D1-,D2-,D3hot+,D3cold+)

Status: D0 PME-Enable- DSel=0 DScale=0 PME-

Capabilities: [100] Advanced Error Reporting

Capabilities: [200] Virtual Channel

IMPORTANT ORDER OF PCI EXPRESS SLOTS

The PHYSICAL PCI Express Slots 1 – 7 are not

in order when displayed in any Operating

Systems Device information.

Mapping Physical Slot locations to port locations using lspci

How do you locate your PCI Express Devices in our Magma Chassis?

And how does that correspond to physical slot locations?

Below is an example of 7 PCI Express Downstream Ports in our Magma

Chassis. This output comes from lspci –vvv > info.txt. It has been

cleaned up for this example. The Magma Chassis is located below

under Bus 07. There are 7 downstream ports on Bus 8, each port has a

number starting with 2, 4, … up to 14. Each port is associated with a

physical slot number, 1 through 7. Ultimately, there is a SCSI card

below located on port 8, port 8, corresponding to physical slot 2.

Unfortunately, the SCSI card results from lspci do not spell out SLOT 2,

just port 8 and that is why it is important to understand that a

downstream port number is not the same as a physical slot number.

The Ethernet card is on port 14, corresponding to physical slot 7.