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SubjectRe: [PATCH 3/8] lightnvm: add support for 2.0 address format
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On 02/13/2018 03:06 PM, Javier González wrote:
> 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;
>

You can fold this into the next patch.

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