[PATCH v4 0/4] Support AMD CDX bus, for FPGA based CDX devices. The CDX

[Nipun Gupta <nipun.gupta@amd.com>]

It uses sysfs interface and the vfio-cdx driver to discover
and initialize the CDX devices.

The CDX bus and VFIO support is available at Xilinx open source tree:
https://github.com/Xilinx/linux-xlnx (drivers/cdx/ and drivers/vfio/cdx)

Linux CDX bus patches has been added into linux next:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/drivers/cdx

VFIO patches are also submitted in upstream:
https://www.spinics.net/lists/kvm/msg310623.html

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.

Changes v3->v4:
- removed platform specific patch (adding config for ARM CDX)
  from this series

Changes v2->v3:
- merged cdx bus compilation enablement in the first patch
- fixed issue reported by check-git-log.sh
- updated release notes
- updated offset to uint64_t instead of off_t in cdx_map_resource

Changes v1->v2:
- Moved file rte_cdx_bus.h to internal bus_cdx_driver.h
  and added this file to deivce_cdx_headers
- Moved cdx.h to private.h
- Removed rte_ prefix from the static symbols in .c files.

Changes RFC->v1:
- Marked few API's as internal which were not required
  to be provided to user.

Nipun Gupta (4):
  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

 MAINTAINERS                            |   5 +
 doc/guides/rel_notes/release_23_07.rst |   6 +
 drivers/bus/cdx/bus_cdx_driver.h       | 227 ++++++++
 drivers/bus/cdx/cdx.c                  | 693 +++++++++++++++++++++++++
 drivers/bus/cdx/cdx_logs.h             |  37 ++
 drivers/bus/cdx/cdx_vfio.c             | 615 ++++++++++++++++++++++
 drivers/bus/cdx/meson.build            |  13 +
 drivers/bus/cdx/private.h              |  49 ++
 drivers/bus/cdx/version.map            |  13 +
 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 +
 14 files changed, 1715 insertions(+)
 create mode 100644 drivers/bus/cdx/bus_cdx_driver.h
 create mode 100644 drivers/bus/cdx/cdx.c
 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/private.h
 create mode 100644 drivers/bus/cdx/version.map

-- 
2.17.1