Following along from Jason's work [1] we have our initial RFC patchset for pds_fwctl - an auxiliary_bus driver for supporting fwctl through the pds_core driver and its PDS core device. The PDS core is PCI device that is separate and distinct from the ionic Eth device and from the other PCI devices that can be supported by the AMD/Pensando DSC. It is used by pds_vdpa and pds_vfio_pci to coordinate/communicate with the FW for setting up their services. Until now the DSC's basic configurations for defining what devices to support and for getting low-level device debug information have been through internal commands not available from the host side, requiring access into the DSC's own OS. Adding the fwctl service allows us to start bringing these capabilities up into the host, but they don't replace the existing function-specific tools. For example, these are things that make the Eth PCI device appear on the PCI bus, while the tuning of the specific Eth features still go through the standard ethtool/devlink/ip/etc tools. The first two patches add a new pds_core.fwctl auxiliary_device to the pds_core driver. This is only supported by the pds_core PF and not on any VFs. The remaining patches add the pds_fwctl driver framework and then fill in the details for the fwctl services. [1] https://lore.kernel.org/netdev/0-v4-0cf4ec3b8143+4995-fwctl_jgg@xxxxxxxxxx/ [PATCH v4 00/10] Introduce fwctl subystem Brett Creeley (1): pds_fwctl: add rpc and query support Shannon Nelson (4): pds_core: specify auxiliary_device to be created pds_core: add new fwctl auxilary_device pds_fwctl: initial driver framework pds_fwctl: add Documentation entries Documentation/userspace-api/fwctl/fwctl.rst | 1 + Documentation/userspace-api/fwctl/index.rst | 1 + .../userspace-api/fwctl/pds_fwctl.rst | 41 ++ MAINTAINERS | 7 + drivers/fwctl/Kconfig | 10 + drivers/fwctl/Makefile | 1 + drivers/fwctl/pds/Makefile | 4 + drivers/fwctl/pds/main.c | 558 ++++++++++++++++++ drivers/net/ethernet/amd/pds_core/auxbus.c | 44 +- drivers/net/ethernet/amd/pds_core/core.c | 7 + drivers/net/ethernet/amd/pds_core/core.h | 8 +- drivers/net/ethernet/amd/pds_core/devlink.c | 6 +- drivers/net/ethernet/amd/pds_core/main.c | 21 +- include/linux/pds/pds_adminq.h | 264 +++++++++ include/linux/pds/pds_common.h | 2 + include/uapi/fwctl/fwctl.h | 1 + include/uapi/fwctl/pds.h | 43 ++ 17 files changed, 988 insertions(+), 31 deletions(-) create mode 100644 Documentation/userspace-api/fwctl/pds_fwctl.rst create mode 100644 drivers/fwctl/pds/Makefile create mode 100644 drivers/fwctl/pds/main.c create mode 100644 include/uapi/fwctl/pds.h -- 2.17.1
