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    Subject[PATCH 3/8] lightnvm: add support for 2.0 address format
    Date
    Add support for 2.0 address format. Also, align address bits for 1.2 and 2.0 to
    align.

    Signed-off-by: Javier González <javier@cnexlabs.com>
    ---
    include/linux/lightnvm.h | 45 ++++++++++++++++++++++++++++++++-------------
    1 file changed, 32 insertions(+), 13 deletions(-)

    diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
    index 6a567bd19b73..e035ae4c9acc 100644
    --- a/include/linux/lightnvm.h
    +++ b/include/linux/lightnvm.h
    @@ -16,12 +16,21 @@ enum {
    NVM_IOTYPE_GC = 1,
    };

    -#define NVM_BLK_BITS (16)
    -#define NVM_PG_BITS (16)
    -#define NVM_SEC_BITS (8)
    -#define NVM_PL_BITS (8)
    -#define NVM_LUN_BITS (8)
    -#define NVM_CH_BITS (7)
    +/* 1.2 format */
    +#define NVM_12_CH_BITS (8)
    +#define NVM_12_LUN_BITS (8)
    +#define NVM_12_BLK_BITS (16)
    +#define NVM_12_PG_BITS (16)
    +#define NVM_12_PL_BITS (4)
    +#define NVM_12_SEC_BITS (4)
    +#define NVM_12_RESERVED (8)
    +
    +/* 2.0 format */
    +#define NVM_20_CH_BITS (8)
    +#define NVM_20_LUN_BITS (8)
    +#define NVM_20_CHK_BITS (16)
    +#define NVM_20_SEC_BITS (24)
    +#define NVM_20_RESERVED (8)

    enum {
    NVM_OCSSD_SPEC_12 = 12,
    @@ -31,16 +40,26 @@ enum {
    struct ppa_addr {
    /* Generic structure for all addresses */
    union {
    + /* 1.2 device format */
    struct {
    - u64 blk : NVM_BLK_BITS;
    - u64 pg : NVM_PG_BITS;
    - u64 sec : NVM_SEC_BITS;
    - u64 pl : NVM_PL_BITS;
    - u64 lun : NVM_LUN_BITS;
    - u64 ch : NVM_CH_BITS;
    - u64 reserved : 1;
    + u64 ch : NVM_12_CH_BITS;
    + u64 lun : NVM_12_LUN_BITS;
    + u64 blk : NVM_12_BLK_BITS;
    + u64 pg : NVM_12_PG_BITS;
    + u64 pl : NVM_12_PL_BITS;
    + u64 sec : NVM_12_SEC_BITS;
    + u64 reserved : NVM_12_RESERVED;
    } g;

    + /* 2.0 device format */
    + struct {
    + u64 ch : NVM_20_CH_BITS;
    + u64 lun : NVM_20_LUN_BITS;
    + u64 chk : NVM_20_CHK_BITS;
    + u64 sec : NVM_20_SEC_BITS;
    + u64 reserved : NVM_20_RESERVED;
    + } m;
    +
    struct {
    u64 line : 63;
    u64 is_cached : 1;
    --
    2.7.4
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