Re: [PATCH v5 09/13] hw/block/nvme: parameterize nvme_ns_nlbas

[Minwoo Im <minwoo.im.dev@gmail.com>]

On 21-03-10 10:53:43, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> Provide a more flexible nlbas helper.
> 
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
>  hw/block/nvme-ns.h | 14 ++++++++++----
>  1 file changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/block/nvme-ns.h b/hw/block/nvme-ns.h
> index 07e16880801d..34f9474a1cd1 100644
> --- a/hw/block/nvme-ns.h
> +++ b/hw/block/nvme-ns.h
> @@ -136,12 +136,18 @@ static inline bool nvme_ns_ext(NvmeNamespace *ns)
>  }
>  
>  /* calculate the number of LBAs that the namespace can accomodate */
> +static inline uint64_t __nvme_nlbas(size_t size, uint8_t lbads, uint16_t ms)
> +{
> +    if (ms) {
> +        return size / ((1 << lbads) + ms);
> +    }
> +
> +    return size >> lbads;
> +}
> +
>  static inline uint64_t nvme_ns_nlbas(NvmeNamespace *ns)
>  {
> -    if (nvme_msize(ns)) {
> -        return ns->size / (nvme_lsize(ns) + nvme_msize(ns));
> -    }
> -    return ns->size >> nvme_ns_lbads(ns);
> +    return __nvme_nlbas(ns->size, nvme_ns_lbads(ns), nvme_msize(ns));
>  }

Hmm.. I think it looks like __nvme_nlbas does the same with the
nvme_ns_nlbas, but flexible argument attributes.  But I think those
three attributes are all for ns-specific fields which is not that
generic so that I don't think we are going to take the helper from much
more general perspective with __nvme_nlbas.