Re: [PATCH v6 42/42] nvme: make lba data size configurable

[Maxim Levitsky <mlevitsk@redhat.com>]

On Mon, 2020-03-16 at 07:29 -0700, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> Acked-by: Keith Busch <kbusch@kernel.org>
> ---
>  hw/block/nvme-ns.c | 7 ++++++-
>  hw/block/nvme-ns.h | 4 +++-
>  hw/block/nvme.c    | 1 +
>  3 files changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/block/nvme-ns.c b/hw/block/nvme-ns.c
> index 6d975104171d..d7e5c81c5f16 100644
> --- a/hw/block/nvme-ns.c
> +++ b/hw/block/nvme-ns.c
> @@ -18,7 +18,7 @@ static int nvme_ns_init(NvmeNamespace *ns)
>  {
>      NvmeIdNs *id_ns = &ns->id_ns;
>  
> -    id_ns->lbaf[0].ds = BDRV_SECTOR_BITS;
> +    id_ns->lbaf[0].ds = ns->params.lbads;
>      id_ns->nsze = cpu_to_le64(nvme_ns_nlbas(ns));
>  
>      /* no thin provisioning */
> @@ -78,6 +78,11 @@ static int nvme_ns_check_constraints(NvmeNamespace *ns, Error **errp)
>          return 1;
>      }
>  
> +    if (ns->params.lbads < 9 || ns->params.lbads > 12) {
> +        error_setg(errp, "unsupported lbads (supported: 9-12)");
> +        return 1;
> +    }
> +
>      return 0;
>  }
>  
> diff --git a/hw/block/nvme-ns.h b/hw/block/nvme-ns.h
> index 3c3651d485d0..43b78f8b8d9c 100644
> --- a/hw/block/nvme-ns.h
> +++ b/hw/block/nvme-ns.h
> @@ -7,10 +7,12 @@
>  
>  #define DEFINE_NVME_NS_PROPERTIES(_state, _props) \
>      DEFINE_PROP_DRIVE("drive", _state, blk), \
> -    DEFINE_PROP_UINT32("nsid", _state, _props.nsid, 0)
> +    DEFINE_PROP_UINT32("nsid", _state, _props.nsid, 0), \
> +    DEFINE_PROP_UINT8("lbads", _state, _props.lbads, BDRV_SECTOR_BITS)
>  
>  typedef struct NvmeNamespaceParams {
>      uint32_t nsid;
> +    uint8_t  lbads;
>  } NvmeNamespaceParams;
>  
>  typedef struct NvmeNamespace {
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index 4f1504fc00fe..61a9da970d41 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -2624,6 +2624,7 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp)
>      if (n->namespace.blk) {
>          ns = &n->namespace;
>          ns->params.nsid = 1;
> +        ns->params.lbads = BDRV_SECTOR_BITS;
>  
>          if (nvme_ns_setup(n, ns, errp)) {
>              return;

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>

Best regards,
	Maxim Levitsky