[v2,0/2] UIO support for dfl devices

Message

Xu Yilun Dec. 14, 2020, 3:36 a.m. UTC

This patchset supports some dfl device drivers written in userspace.

In the patchset v1, the "driver_override" interface should be used to bind
the DFL UIO driver to DFL devices. But there is concern that the
"driver_override" interface is not OK itself. So in v2, we use a new
matching algorithem. The "driver_override" interface is abandoned, the DFL
UIO driver matches any DFL device which could not be handled by other DFL
drivers. So the DFL UIO driver could be used for new DFL devices which are
not supported by kernel, also it will not impact the devices which are
already got supported.

Main changes from v1:
- switch to the new matching algorithem. It matches DFL devices which could
  not be handled by other DFL drivers.
- refacor the code about device resources filling.
- add the documentation.


Xu Yilun (2):
  fpga: dfl: add the userspace I/O device support for DFL devices
  Documentation: fpga: dfl: Add description for DFL UIO support

 Documentation/fpga/dfl.rst  |  23 ++++++++++
 drivers/fpga/Kconfig        |  10 ++++
 drivers/fpga/Makefile       |   1 +
 drivers/fpga/dfl-uio-pdev.c | 108 ++++++++++++++++++++++++++++++++++++++++++++
 drivers/fpga/dfl.c          |  22 +++++++--
 include/linux/dfl.h         |   7 +++
 6 files changed, 166 insertions(+), 5 deletions(-)
 create mode 100644 drivers/fpga/dfl-uio-pdev.c