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SubjectRe: [PATCH 0/5] bus: fsl-mc: add userspace support
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On 1/14/2021 7:07 PM, Ioana Ciornei wrote:
> From: Ioana Ciornei <ioana.ciornei@nxp.com>
>
> This patch set adds userspace support in the fsl-mc bus along with a
> rescan attribute to the root DPRC container. An earlier discussion on
> this functionality can be found at the link below. I didn't continue
> with the versioning scheme since quite some time has passed since the
> last discussion.
> https://lkml.org/lkml/2018/11/20/1162
>
> The FSL_MC_SEND_MC_COMMAND ioctl acts as a direct passthrough to the
> Management Complex (or MC) by passing fixed-length command/response
> pairs. Keeping in mind that the MC manages DPAA2 hardware resources and
> provides and object-based abstraction for sofware drivers, the proposed
> ioctl interface enables userspace tools to do the following:
> - Get layout information about the available resources abstracted and
> exported by the Management Complex firmware. This is especially
> useful to generate a complete description of the current hardware
> resource partitioning.
> - Manage DPAA2 objects lifecycle (create, destroy) and establish
> connection between different components as needed.
>
> The ioctl interface is intended for dynamic usecases where DPAA2 objects
> need to be created on demand or destroyed so that the underlying
> hardware resources can be further repurposed. In static usecases,
> depending on the requirements, a firmware configuration file can be used
> to describe the needed DPAA2 objects, their attributes or any link
> between them.
>
> Each command received through the ioctl interface is first checked
> against a list of accepted MC commands. Also, commands which would alter
> the hardware resource management require CAP_NET_ADMIN. The command is
> also check so that it does not contain garbage beyond the maximum size
> expected for that command id.
>
> Ioana Ciornei (5):
> bus: fsl-mc: move fsl_mc_command struct in a uapi header
> bus: fsl-mc: export mc_cmd_hdr_read_cmdid() to the fsl-mc bus
> bus: fsl-mc: add fsl-mc userspace support
> bus: fsl-mc: add bus rescan attribute
> bus: fsl-mc: add autorescan sysfs
>
> Documentation/ABI/stable/sysfs-bus-fsl-mc | 19 +
> .../userspace-api/ioctl/ioctl-number.rst | 1 +
> MAINTAINERS | 2 +
> drivers/bus/fsl-mc/Kconfig | 7 +
> drivers/bus/fsl-mc/Makefile | 3 +
> drivers/bus/fsl-mc/dprc-driver.c | 33 +-
> drivers/bus/fsl-mc/fsl-mc-bus.c | 96 +++
> drivers/bus/fsl-mc/fsl-mc-private.h | 49 ++
> drivers/bus/fsl-mc/fsl-mc-uapi.c | 547 ++++++++++++++++++
> drivers/bus/fsl-mc/mc-sys.c | 2 +-
> include/linux/fsl/mc.h | 8 +-
> include/uapi/linux/fsl_mc.h | 34 ++
> 12 files changed, 789 insertions(+), 12 deletions(-)
> create mode 100644 Documentation/ABI/stable/sysfs-bus-fsl-mc
> create mode 100644 drivers/bus/fsl-mc/fsl-mc-uapi.c
> create mode 100644 include/uapi/linux/fsl_mc.h
>

For the series:

Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>

---
Best Regards, Laurentiu

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