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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: Vaibhav Jain <vaibhav@linux.ibm.com>, linuxppc-dev@lists.ozlabs.org,
        linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v8 4/5] ndctl/papr_scm,uapi: Add support for PAPR nvdimm
 specific methods
In-Reply-To: <20200527041244.37821-5-vaibhav@linux.ibm.com>
References: <20200527041244.37821-1-vaibhav@linux.ibm.com>
 <20200527041244.37821-5-vaibhav@linux.ibm.com>
Date: Wed, 27 May 2020 15:25:21 +0530
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CC: Vaibhav Jain <vaibhav@linux.ibm.com>, Michael Ellerman <mpe@ellerman.id.au>, Steven Rostedt <rostedt@goodmis.org>
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Vaibhav Jain <vaibhav@linux.ibm.com> writes:

> Introduce support for PAPR NVDIMM Specific Methods (PDSM) in papr_scm
> module and add the command family to the white list of NVDIMM command
> sets. Also advertise support for ND_CMD_CALL for the nvdimm
> command mask and implement necessary scaffolding in the module to
> handle ND_CMD_CALL ioctl and PDSM requests that we receive.
>
> The layout of the PDSM request as we expect from libnvdimm/libndctl is
> described in newly introduced uapi header 'papr_scm_pdsm.h' which
> defines a new 'struct nd_pdsm_cmd_pkg' header. This header is used
> to communicate the PDSM request via member
> 'nd_pkg_papr_scm->nd_command' and size of payload that need to be
> sent/received for servicing the PDSM.
>
> A new function is_cmd_valid() is implemented that reads the args to
> papr_scm_ndctl() and performs sanity tests on them. A new function
> papr_scm_service_pdsm() is introduced and is called from
> papr_scm_ndctl() in case of a PDSM request is received via ND_CMD_CALL
> command from libnvdimm.
>

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>

> Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
> Cc: Dan Williams <dan.j.williams@intel.com>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Ira Weiny <ira.weiny@intel.com>
> Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
> ---

-aneesh
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