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Message-ID: <20221207004443.33779-17-shannon.nelson@amd.com> Date: Tue, 6 Dec 2022 16:44:43 -0800 From: Shannon Nelson <shannon.nelson@....com> To: <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org> CC: <drivers@...sando.io>, Shannon Nelson <shannon.nelson@....com> Subject: [PATCH v2 net-next 16/16] pds_core: Kconfig and pds_core.rst Documentation and Kconfig hook for building the driver. Signed-off-by: Shannon Nelson <shannon.nelson@....com> --- .../ethernet/pensando/pds_core.rst | 159 ++++++++++++++++++ MAINTAINERS | 3 +- drivers/net/ethernet/pensando/Kconfig | 12 ++ 3 files changed, 173 insertions(+), 1 deletion(-) create mode 100644 Documentation/networking/device_drivers/ethernet/pensando/pds_core.rst diff --git a/Documentation/networking/device_drivers/ethernet/pensando/pds_core.rst b/Documentation/networking/device_drivers/ethernet/pensando/pds_core.rst new file mode 100644 index 000000000000..95424e8ba1fb --- /dev/null +++ b/Documentation/networking/device_drivers/ethernet/pensando/pds_core.rst @@ -0,0 +1,159 @@ +.. SPDX-License-Identifier: GPL-2.0+ + +======================================================== +Linux Driver for the Pensando(R) DSC adapter family +======================================================== + +Pensando Linux Core driver +Copyright(c) 2022 Pensando Systems, Inc + +Identifying the Adapter +======================= + +To find if one or more Pensando PCI Core devices are installed on the +host, check for the PCI devices:: + + # lspci -d 1dd8:100c + 39:00.0 Processing accelerators: Pensando Systems Device 100c + 3a: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: 126.016 Gb/s available PCIe bandwidth (8.0 GT/s PCIe x16 link) + pds_core 0000:b5:00.0: FW: 1.51.0-73 + pds_core 0000:b6:00.0: 126.016 Gb/s available PCIe bandwidth (8.0 GT/s PCIe x16 link) + pds_core 0000:b5:00.0: FW: 1.51.0-73 + +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 1.51.0-73 + fw.mainfwb 1.51.0-57 + + +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 + + +The ``pds_core`` driver also implements the following driver-specific +parameters for similar uses, as well as for selecting the next boot firmware: + +.. list-table:: Driver-specific parameters implemented + :widths: 5 5 8 82 + + * - Name + - Mode + - Type + - Description + * - ``enable_migration`` + - runtime + - Boolean + - Enables Live Migration functionality through an auxiliary_bus device + * - ``fw_bank`` + - runtime + - String + - Selects the Firmware slot to use for the next DSC boot + + +Firmware Management +=================== + +The ``fw_bank`` parameter can inspect and select the firmware image to be +used in the next DSC boot up. Banks 1 and 2 are used for normal operations, +while bank 3 should only be selected for recovery purposes if both the other +banks have bad or corrupted firmware. + +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 +currrently in use, and that bank will be then selected for the next boot. +The ``fw_bank`` parameter will be updated to reflect this. + +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_CORE Support + +Support +======= + +For general Linux networking support, please use the netdev mailing +list, which is monitored by Pensando personnel:: + + netdev@...r.kernel.org + +For more specific support needs, please use the Pensando driver support +email:: + + drivers@...sando.io diff --git a/MAINTAINERS b/MAINTAINERS index 955c1be1efb2..f77fd6fbdedd 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -16156,8 +16156,9 @@ M: Brett Creeley <brett.creeley@....com> M: drivers@...sando.io L: netdev@...r.kernel.org S: Supported -F: Documentation/networking/device_drivers/ethernet/pensando/ionic.rst +F: Documentation/networking/device_drivers/ethernet/pensando/ F: drivers/net/ethernet/pensando/ +F: include/linux/pds/ PER-CPU MEMORY ALLOCATOR M: Dennis Zhou <dennis@...nel.org> diff --git a/drivers/net/ethernet/pensando/Kconfig b/drivers/net/ethernet/pensando/Kconfig index 3f7519e435b8..d9e8973d54f6 100644 --- a/drivers/net/ethernet/pensando/Kconfig +++ b/drivers/net/ethernet/pensando/Kconfig @@ -17,6 +17,18 @@ config NET_VENDOR_PENSANDO if NET_VENDOR_PENSANDO +config PDS_CORE + tristate "Pensando Data Systems Core Device Support" + depends on 64BIT && PCI + help + This enables the support for the Pensando Core device family of + adapters. More specific information on this driver can be + found in + <file:Documentation/networking/device_drivers/ethernet/pensando/pds_core.rst>. + + To compile this driver as a module, choose M here. The module + will be called pds_core. + config IONIC tristate "Pensando Ethernet IONIC Support" depends on 64BIT && PCI -- 2.17.1
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