Support AMD CDX bus, for FPGA based CDX devices. The CDX devices are memory mapped on system bus for embedded CPUs.
It uses sysfs interface and the vfio-cdx driver to discover and initialize the CDX devices. The patches are intended for DPDK 23.07 release, and have been sent as an RFC as patches are yet to be merged in Linux. Linux CDX bus patches has been submitted at: https://lore.kernel.org/lkml/20230117134139.1298-4-nipun.gu...@amd.com/T/ CDX is a Hardware Architecture designed for AMD FPGA devices. It consists of mechanism for interaction between FPGA, Firmware and the APUs (Application CPUs). Firmware resides on RPU (Realtime CPUs) which interacts with the FPGA program manager and the APUs. The RPU provides memory-mapped interface (RPU if) which is used to communicate with APUs. VFIO CDX driver provides the CDX device resources like MMIO and interrupts to map to user-space. DPDK CDX bus uses sysfs interface and the vfio-cdx driver to discover and initialize the CDX devices for user-space applications. Nipun Gupta (6): bus/cdx: introduce cdx bus bus/cdx: add dma map and unmap support bus/cdx: add support for MSI bus/cdx: support plug unplug and dev iterator bus: enable cdx bus config/arm: add AMD CDX MAINTAINERS | 5 + config/arm/arm64_cdx_linux_gcc | 17 + config/arm/meson.build | 15 + drivers/bus/cdx/cdx.c | 737 +++++++++++++++++++++++++ drivers/bus/cdx/cdx.h | 54 ++ drivers/bus/cdx/cdx_logs.h | 37 ++ drivers/bus/cdx/cdx_vfio.c | 606 ++++++++++++++++++++ drivers/bus/cdx/meson.build | 13 + drivers/bus/cdx/rte_bus_cdx.h | 245 ++++++++ drivers/bus/cdx/version.map | 21 + drivers/bus/meson.build | 1 + lib/eal/common/eal_common_interrupts.c | 21 + lib/eal/common/eal_interrupts.h | 1 + lib/eal/include/rte_interrupts.h | 32 ++ lib/eal/version.map | 2 + 15 files changed, 1807 insertions(+) create mode 100644 config/arm/arm64_cdx_linux_gcc create mode 100644 drivers/bus/cdx/cdx.c create mode 100644 drivers/bus/cdx/cdx.h create mode 100644 drivers/bus/cdx/cdx_logs.h create mode 100644 drivers/bus/cdx/cdx_vfio.c create mode 100644 drivers/bus/cdx/meson.build create mode 100644 drivers/bus/cdx/rte_bus_cdx.h create mode 100644 drivers/bus/cdx/version.map -- 2.25.1
