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Diffstat (limited to 'Documentation/networking/device_drivers/ethernet/amd')
3 files changed, 303 insertions, 0 deletions
diff --git a/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst new file mode 100644 index 000000000..9e8a16c44 --- /dev/null +++ b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst @@ -0,0 +1,139 @@ +.. 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 diff --git a/Documentation/networking/device_drivers/ethernet/amd/pds_vdpa.rst b/Documentation/networking/device_drivers/ethernet/amd/pds_vdpa.rst new file mode 100644 index 000000000..587927d3d --- /dev/null +++ b/Documentation/networking/device_drivers/ethernet/amd/pds_vdpa.rst @@ -0,0 +1,85 @@ +.. SPDX-License-Identifier: GPL-2.0+ +.. note: can be edited and viewed with /usr/bin/formiko-vim + +========================================================== +PCI vDPA driver for the AMD/Pensando(R) DSC adapter family +========================================================== + +AMD/Pensando vDPA VF Device Driver + +Copyright(c) 2023 Advanced Micro Devices, Inc + +Overview +======== + +The ``pds_vdpa`` driver is an auxiliary bus driver that supplies +a vDPA device for use by the virtio network stack. It is used with +the Pensando Virtual Function devices that offer vDPA and virtio queue +services. It depends on the ``pds_core`` driver and hardware for the PF +and VF PCI handling as well as for device configuration services. + +Using the device +================ + +The ``pds_vdpa`` device is enabled via multiple configuration steps and +depends on the ``pds_core`` driver to create and enable SR-IOV Virtual +Function devices. After the VFs are enabled, we enable the vDPA service +in the ``pds_core`` device to create the auxiliary devices used by pds_vdpa. + +Example steps: + +.. code-block:: bash + + #!/bin/bash + + modprobe pds_core + modprobe vdpa + modprobe pds_vdpa + + PF_BDF=`ls /sys/module/pds_core/drivers/pci\:pds_core/*/sriov_numvfs | awk -F / '{print $7}'` + + # Enable vDPA VF auxiliary device(s) in the PF + devlink dev param set pci/$PF_BDF name enable_vnet cmode runtime value true + + # Create a VF for vDPA use + echo 1 > /sys/bus/pci/drivers/pds_core/$PF_BDF/sriov_numvfs + + # Find the vDPA services/devices available + PDS_VDPA_MGMT=`vdpa mgmtdev show | grep vDPA | head -1 | cut -d: -f1` + + # Create a vDPA device for use in virtio network configurations + vdpa dev add name vdpa1 mgmtdev $PDS_VDPA_MGMT mac 00:11:22:33:44:55 + + # Set up an ethernet interface on the vdpa device + modprobe virtio_vdpa + + + +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 + -> Pensando devices + -> Pensando Ethernet PDS_VDPA Support + +Support +======= + +For general Linux networking support, please use the netdev mailing +list, which is monitored by Pensando personnel:: + + netdev@vger.kernel.org + +For more specific support needs, please use the Pensando driver support +email:: + + drivers@pensando.io diff --git a/Documentation/networking/device_drivers/ethernet/amd/pds_vfio_pci.rst b/Documentation/networking/device_drivers/ethernet/amd/pds_vfio_pci.rst new file mode 100644 index 000000000..7a6bc848a --- /dev/null +++ b/Documentation/networking/device_drivers/ethernet/amd/pds_vfio_pci.rst @@ -0,0 +1,79 @@ +.. SPDX-License-Identifier: GPL-2.0+ +.. note: can be edited and viewed with /usr/bin/formiko-vim + +========================================================== +PCI VFIO driver for the AMD/Pensando(R) DSC adapter family +========================================================== + +AMD/Pensando Linux VFIO PCI Device Driver +Copyright(c) 2023 Advanced Micro Devices, Inc. + +Overview +======== + +The ``pds-vfio-pci`` module is a PCI driver that supports Live Migration +capable Virtual Function (VF) devices in the DSC hardware. + +Using the device +================ + +The pds-vfio-pci device is enabled via multiple configuration steps and +depends on the ``pds_core`` driver to create and enable SR-IOV Virtual +Function devices. + +Shown below are the steps to bind the driver to a VF and also to the +associated auxiliary device created by the ``pds_core`` driver. This +example assumes the pds_core and pds-vfio-pci modules are already +loaded. + +.. code-block:: bash + :name: example-setup-script + + #!/bin/bash + + PF_BUS="0000:60" + PF_BDF="0000:60:00.0" + VF_BDF="0000:60:00.1" + + # Prevent non-vfio VF driver from probing the VF device + echo 0 > /sys/class/pci_bus/$PF_BUS/device/$PF_BDF/sriov_drivers_autoprobe + + # Create single VF for Live Migration via pds_core + echo 1 > /sys/bus/pci/drivers/pds_core/$PF_BDF/sriov_numvfs + + # Allow the VF to be bound to the pds-vfio-pci driver + echo "pds-vfio-pci" > /sys/class/pci_bus/$PF_BUS/device/$VF_BDF/driver_override + + # Bind the VF to the pds-vfio-pci driver + echo "$VF_BDF" > /sys/bus/pci/drivers/pds-vfio-pci/bind + +After performing the steps above, a file in /dev/vfio/<iommu_group> +should have been created. + + +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 + -> VFIO Non-Privileged userspace driver framework + -> VFIO support for PDS PCI devices + +Support +======= + +For general Linux networking support, please use the netdev mailing +list, which is monitored by Pensando personnel:: + + netdev@vger.kernel.org + +For more specific support needs, please use the Pensando driver support +email:: + + drivers@pensando.io |