Messages in this thread | | | Subject | Re: [PATCH 0/5] bus: fsl-mc: add userspace support | From | Laurentiu Tudor <> | Date | Wed, 27 Jan 2021 16:05:13 +0200 |
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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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