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    Subject[PATCH v2 2/3] nvdimm: Add wrapper for IOCTL pass thru
    Date
    Add struct nd_passthru_pkg which serves as a warapper for
    the data being passed via a pass thru to a NVDIMM DSM.
    This wrapper specifies the extra information in a uniform
    manner allowing the kenrel to call a DSM without knowing
    specifics of the DSM.

    Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
    ---
    include/uapi/linux/ndctl.h | 16 ++++++++++++++++
    1 file changed, 16 insertions(+)

    diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h
    index 5b4a4be..934a49f 100644
    --- a/include/uapi/linux/ndctl.h
    +++ b/include/uapi/linux/ndctl.h
    @@ -109,6 +109,7 @@ enum {
    ND_CMD_VENDOR_EFFECT_LOG_SIZE = 7,
    ND_CMD_VENDOR_EFFECT_LOG = 8,
    ND_CMD_VENDOR = 9,
    + ND_CMD_PASSTHRU = 100,
    };

    enum {
    @@ -204,4 +205,19 @@ enum ars_masks {
    ARS_STATUS_MASK = 0x0000FFFF,
    ARS_EXT_STATUS_SHIFT = 16,
    };
    +
    +
    +struct nd_passthru_pkg {
    + struct {
    + __u8 dsm_uuid[16];
    + __u64 dsm_rev; /* revision of dsm call */
    + __u64 dsm_fun_idx; /* DSM function id */
    + __u32 dsm_in; /* size of _DSM input */
    + __u32 dsm_out; /* size of user buffer */
    + __u64 reserved[12]; /* reserved must be zero */
    + __u32 dsm_size; /* size _DSM would write */
    + } h;
    + unsigned char buf[];
    +};
    +
    #endif /* __NDCTL_H__ */
    --
    1.7.11.3


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