PCI(e) Bus Drivers

PCI(e) bus driver can be found in drivers/pci.

Supported PCI devices

PCI QEMU Test Device

Test device provided by QEMU and enabled with -device pci-testdev.

PCI QEMU EDU Device

Test device provided by QEMU and enabled with -device edu.

Inter-VM share memory Device (ivshmem)

Inter-VM shared memory support support can be found in drivers/pci/pci_ivshmem.c.

This implementation is for ivshmem-v1 which is compatible with QEMU and ACRN hypervisor but won’t work with Jailhouse hypervisor which uses ivshmem-v2.

16550 Compatible Serial Card

UART 16550 compatible PCI serial card support can be found in drivers/serial/uart_pci_16550.c.

Supported devices:

  • AX99100

  • QEMU pci-serial device

  • QEMU pci-serial-2x device

  • QEMU pci-serial-4x device

Intel e1000

Intel e1000 compatible NIC support can be found in drivers/net/e1000.c.

Supported devices:

  • Intel I219

  • Intel 82540EM

  • Intel 82574L

  • Intel 82574L

Intel igb

Intel igb compatible NIC support can be found in drivers/net/igb.c.

Supported devices:

  • Intel 82576

  • Intel I211

Intel igc

Intel igc compatible NIC support can be found in drivers/net/igc.c.

Supported devices:

  • Intel I225LM

  • Intel I226V

Kvaser PCI CAN card

At the moment the card only works with QEMU.

The driver supports both SocketCAN interface and character driver.

The driver requires, vcan to run on the host:

sudo ip link add dev can0 type vcan
sudo ip link set can0 up

An example command to run the driver on x86_64 looks like this:

qemu-system-x86_64 -m 2G -cpu host -enable-kvm -kernel nuttx \
-nographic -serial mon:stdio -object can-bus,id=canbus0 \
-object can-host-socketcan,id=canhost0,if=can0,canbus=canbus0 \
-device kvaser_pci,canbus=canbus0

CTUCANFD PCI CAN card

At the moment the card only works with QEMU.

The driver supports both SocketCAN interface and character driver.

The driver requires, vcan to run on the host:

sudo ip link add dev can0 type vcan
sudo ip link set can0 up

An example command to run the driver on x86_64 looks like this:

qemu-system-x86_64 -m 2G -cpu host -enable-kvm -kernel nuttx \
-nographic -serial mon:stdio -object can-bus,id=canbus0-bus \
-object can-host-socketcan,if=can0,canbus=canbus0-bus,id=canbus0-socketcan \
-device ctucan_pci,canbus0=canbus0-bus,canbus1=canbus0-bus

xHCI over PCI

xHCI support was tested on x86_64 target, both on QEMU and real hardware.

Known issues with this driver:

  • Currently only USB2.0 is supported, there is no USB3.0 support in NuttX yet.

  • USB HUB devices not supported yet

To enable xHCI support on QEMU, we have to add -device qemu-xhci argument. All supported USB devices in QEMU can be found in QEMU documentation, but not all classes are supported in NuttX.