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.. SPDX-License-Identifier: GPL-2.0+
========================================================
Linux Driver for the AMD/Pensando(R) DSC adapter family
========================================================
Copyright(c) 2023 Advanced Micro Devices, Inc
Identifying the Adapter
=======================
To find if one or more AMD/Pensando PCI Core devices are installed on the
host, check for the PCI devices::
# lspci -d 1dd8:100c
b5:00.0 Processing accelerators: Pensando Systems Device 100c
b6:00.0 Processing accelerators: Pensando Systems Device 100c
If such devices are listed as above, then the pds_core.ko driver should find
and configure them for use. There should be log entries in the kernel
messages such as these::
$ dmesg | grep pds_core
pds_core 0000:b5:00.0: 252.048 Gb/s available PCIe bandwidth (16.0 GT/s PCIe x16 link)
pds_core 0000:b5:00.0: FW: 1.60.0-73
pds_core 0000:b6:00.0: 252.048 Gb/s available PCIe bandwidth (16.0 GT/s PCIe x16 link)
pds_core 0000:b6:00.0: FW: 1.60.0-73
Driver and firmware version information can be gathered with devlink::
$ devlink dev info pci/0000:b5:00.0
pci/0000:b5:00.0:
driver pds_core
serial_number FLM18420073
versions:
fixed:
asic.id 0x0
asic.rev 0x0
running:
fw 1.51.0-73
stored:
fw.goldfw 1.15.9-C-22
fw.mainfwa 1.60.0-73
fw.mainfwb 1.60.0-57
Info versions
=============
The ``pds_core`` driver reports the following versions
.. list-table:: devlink info versions implemented
:widths: 5 5 90
* - Name
- Type
- Description
* - ``fw``
- running
- Version of firmware running on the device
* - ``fw.goldfw``
- stored
- Version of firmware stored in the goldfw slot
* - ``fw.mainfwa``
- stored
- Version of firmware stored in the mainfwa slot
* - ``fw.mainfwb``
- stored
- Version of firmware stored in the mainfwb slot
* - ``asic.id``
- fixed
- The ASIC type for this device
* - ``asic.rev``
- fixed
- The revision of the ASIC for this device
Parameters
==========
The ``pds_core`` driver implements the following generic
parameters for controlling the functionality to be made available
as auxiliary_bus devices.
.. list-table:: Generic parameters implemented
:widths: 5 5 8 82
* - Name
- Mode
- Type
- Description
* - ``enable_vnet``
- runtime
- Boolean
- Enables vDPA functionality through an auxiliary_bus device
Firmware Management
===================
The ``flash`` command can update a the DSC firmware. The downloaded firmware
will be saved into either of firmware bank 1 or bank 2, whichever is not
currently in use, and that bank will used for the next boot::
# devlink dev flash pci/0000:b5:00.0 \
file pensando/dsc_fw_1.63.0-22.tar
Health Reporters
================
The driver supports a devlink health reporter for FW status::
# devlink health show pci/0000:2b:00.0 reporter fw
pci/0000:2b:00.0:
reporter fw
state healthy error 0 recover 0
# devlink health diagnose pci/0000:2b:00.0 reporter fw
Status: healthy State: 1 Generation: 0 Recoveries: 0
Enabling the driver
===================
The driver is enabled via the standard kernel configuration system,
using the make command::
make oldconfig/menuconfig/etc.
The driver is located in the menu structure at:
-> Device Drivers
-> Network device support (NETDEVICES [=y])
-> Ethernet driver support
-> AMD devices
-> AMD/Pensando Ethernet PDS_CORE Support
Support
=======
For general Linux networking support, please use the netdev mailing
list, which is monitored by AMD/Pensando personnel::
netdev@vger.kernel.org
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