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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.