NAME

rshim - user-space rshim driver for BlueField SoC

SYNOPSIS

rshim [options]

DESCRIPTION

rshim is the user-space rshim driver for BlueField SoC. It provides ways to access the rshim resources on the BlueField target via USB or PCIe from external host machine. The current version implements virtual console, virtual network interface, boot stream push, register access and some utility commands.

This driver will probe the rshim backend and create directory /dev/rshim<N> for each of them with the following device files.

/dev/rshim<N>/boot

Boot device file used to push boot stream to the target, for example,

cat install.bfb > /dev/rshim<N>/boot

/dev/rshim<N>/console

Console device file, which can be used by console tools to connect to the target, such as

screen /dev/rshim<N>/console

/dev/rshim<N>/rshim

Device file used to access rshim register space. When reading/writing to this file, the offset is encoded as "((rshim_channel << 16) | register_offset)". This file can be used by tools like openocd to do CoreSight debugging.

/dev/rshim<N>/misc

Key/Value pairs used to read/write misc information. For example

Display the output

cat /dev/rshim0/misc


    DISPLAY_LEVEL   0 (0:basic, 1:advanced, 2:log)


    BOOT_MODE       1 (0:rshim, 1:emmc, 2:emmc-boot-swap)


    BOOT_TIMEOUT    100 (seconds)


    SW_RESET        0 (1: reset)


    DEV_NAME        pcie-04:00.2


    DEV_INFO        BlueField-1(Rev 0)

Initiate SW reset

echo "SW_RESET 1" > /dev/rshim<N>/misc

Enable the advanced options

echo "DISPLAY_LEVEL 1" > /dev/rshim<N>/misc
cat /dev/rshim0/misc


    DISPLAY_LEVEL   1 (0:basic, 1:advanced, 2:log)


    BOOT_MODE       1 (0:rshim, 1:emmc, 2:emmc-boot-swap)


    BOOT_TIMEOUT    100 (seconds)


    SW_RESET        0 (1: reset)


    DEV_NAME        pcie-04:00.2


    DEV_INFO        BlueField-1(Rev 0)


    PEER_MAC        00:1a:ca:ff:ff:01 (rw)


    PXE_ID          0x00000000 (rw)


    VLAN_ID         0 0 (rw)

OPTIONS

-b, --backend
Specify the backend to attach, which can be one of usb, pcie or pcie_lf. If not specified, the driver will scan all rshim backends unless the '-d' option is given with a device name specified.

-d, --device
Specify the device name to attach with the format below. The backend driver can be deduced from the device name, thus the '-b' option is not needed.

PCIe backend:
pcie-<bus>:<device>.<function>. Example: pcie-04:00.2
Devices can be found with command 'lspci -n'.

PCIe backend in livefish mode:
pcie-lf-<bus>:<device>.<function>. Example: pcie-04:00.2
Devices can be found with command 'lspci -n'.

USB backend:
usb-<bus>-xx.xx. Example: usb-2-1.7
Devices can be found under /sys/bus/usb/devices/.

-f, --foreground
Run in forground.

-i, --index
Specify the index to create device path /dev/rshim<index>. It's also used to create network interface name tmfifo_net<index>. This option is needed when multiple rshim instances are running.

-l, --log-level
Log level (0:none, 1:error, 2:warning, 3:notice, 4:debug) Log messages will be printed to standard output when running in foreground, or in syslog when running as a daemon.

-v, --version
Display version

CONFIGURATION FILE

Rshim configuration file (/etc/rshim.conf) can be used to specify the static mapping between rshim devices and rshim names. It can also be used to ignore some rshim devices.

Example:
# Map usb-2-1.7 to rshim0
rshim0 usb-2-1.7

# Map pcie-0000:04:00.2 to rshim1
rshim1 pcie-0000:04:00.2

# Ignore usb-1-1.4
none usb-1-1.4