Re: [Linux-nvdimm] [PATCH 08/21] nd: ndctl.h, the nd ioctl abi

From: Toshi Kani
Date: Fri Apr 24 2015 - 12:28:39 EST

On Fri, 2015-04-24 at 09:56 -0600, Toshi Kani wrote:
> On Fri, 2015-04-17 at 21:35 -0400, Dan Williams wrote:
> > Most configuration of the nd-subsystem is done via nd-sysfs. However,
> > the NFIT specification defines a small set of messages that can be
> > passed to the subsystem via platform-firmware-defined methods. The
> > command set (as of the current version of the NFIT-DSM spec) is:
> >
> > NFIT_CMD_SMART: media health and diagnostics
> > NFIT_CMD_GET_CONFIG_SIZE: size of the label space
> > NFIT_CMD_GET_CONFIG_DATA: read label
> > NFIT_CMD_SET_CONFIG_DATA: write label
> > NFIT_CMD_VENDOR: vendor-specific command passthrough
> > NFIT_CMD_ARS_CAP: report address-range-scrubbing capabilities
> > NFIT_CMD_START_ARS: initiate scrubbing
> > NFIT_CMD_QUERY_ARS: report on scrubbing state
> > NFIT_CMD_SMART_THRESHOLD: configure alarm thresholds for smart events
> "nd/bus.c" provides two features, 1) the top level ND bus driver which
> is the central part of the ND, and 2) the ioctl interface specific to
> the example-DSM-interface. I think the example-DSM-specific part should
> be put into an example-DSM-support module, so that the ND can support
> other _DSMs as necessary. Also, _DSM needs to be handled as optional.

And the same for "nd/acpi.c", which is 1) the ACPI0012 handler, and 2)
the example-DSM-support module. I think they need to be separated.


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