linux-kernel - Re: [PATCH 2/3] lightnvm: enable metadata to be sent to device

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Message-ID: <5722147E.8090006@lightnvm.io>
Date:	Thu, 28 Apr 2016 15:47:42 +0200
From:	Matias Bjørling <mb@...htnvm.io>
To:	Javier González <jg@...htnvm.io>
Cc:	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
	Javier González <javier@...xlabs.com>
Subject: Re: [PATCH 2/3] lightnvm: enable metadata to be sent to device

On 04/27/2016 07:28 PM, Javier González wrote:
> Enable metadata to be sent to the device through the metadata field on
> the physical rw nvme command. When a single ppa is sent to the device, a
> 64-bit integer can be sent as metadata; when a ppa list is sent, a
> 64-bit integer list mapping to the ppa list can be used to send
> metadata.
>
> Signed-off-by: Javier González <javier@...xlabs.com>
> ---
>   drivers/nvme/host/lightnvm.c | 1 +
>   include/linux/lightnvm.h     | 4 ++--
>   2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
> index b1a0d8b..92da28d 100644
> --- a/drivers/nvme/host/lightnvm.c
> +++ b/drivers/nvme/host/lightnvm.c
> @@ -467,6 +467,7 @@ static inline void nvme_nvm_rqtocmd(struct request *rq, struct nvm_rq *rqd,
>   	c->ph_rw.opcode = rqd->opcode;
>   	c->ph_rw.nsid = cpu_to_le32(ns->ns_id);
>   	c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
> +	c->ph_rw.metadata = cpu_to_le64(rqd->meta_list);
>   	c->ph_rw.control = cpu_to_le16(rqd->flags);
>   	c->ph_rw.length = cpu_to_le16(rqd->nr_pages - 1);
>
> diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
> index 1e3b53e..9768bae 100644
> --- a/include/linux/lightnvm.h
> +++ b/include/linux/lightnvm.h
> @@ -239,8 +239,8 @@ struct nvm_rq {
>
>   	struct ppa_addr *ppa_list;
>
> -	void *metadata;
> -	dma_addr_t dma_metadata;
> +	void *meta_list;
> +	dma_addr_t dma_meta_list;
>
>   	struct completion *wait;
>   	nvm_end_io_fn *end_io;
>

Thanks Javier. Applied for 4.7.