linux-kernel - Re: [PATCH] nvme: lightnvm: use nvme admin queue

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Date:	Fri, 20 Nov 2015 13:45:08 +0100
From:	Matias Bjørling <mb@...htnvm.io>
To:	Wenwei Tao <ww.tao0320@...il.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvme: lightnvm: use nvme admin queue

On 11/20/2015 07:28 AM, Wenwei Tao wrote:
> According to Open-ChannelSSDInterfaceSpecification 0.1,
> NVMe-NVM admin commands use vendor specific admin opcodes
> of NVMe, so use the NVMe admin queue to dispatch these
> commands
>
> Signed-off-by: Wenwei Tao <ww.tao0320@...il.com>
> ---
>   drivers/nvme/host/lightnvm.c | 13 +++++++------
>   1 file changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
> index e0b7b95..7d1981d 100644
> --- a/drivers/nvme/host/lightnvm.c
> +++ b/drivers/nvme/host/lightnvm.c
> @@ -244,6 +244,7 @@ static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
>   static int nvme_nvm_identity(struct request_queue *q, struct nvm_id *nvm_id)
>   {
>   	struct nvme_ns *ns = q->queuedata;
> +	struct nvme_dev *dev = ns->dev;
>   	struct nvme_nvm_id *nvme_nvm_id;
>   	struct nvme_nvm_command c = {};
>   	int ret;
> @@ -256,8 +257,8 @@ static int nvme_nvm_identity(struct request_queue *q, struct nvm_id *nvm_id)
>   	if (!nvme_nvm_id)
>   		return -ENOMEM;
>
> -	ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, nvme_nvm_id,
> -						sizeof(struct nvme_nvm_id));
> +	ret = nvme_submit_sync_cmd(dev->admin_q, (struct nvme_command *)&c,
> +				nvme_nvm_id, sizeof(struct nvme_nvm_id));
>   	if (ret) {
>   		ret = -EIO;
>   		goto out;
> @@ -299,8 +300,8 @@ static int nvme_nvm_get_l2p_tbl(struct request_queue *q, u64 slba, u32 nlb,
>   		c.l2p.slba = cpu_to_le64(cmd_slba);
>   		c.l2p.nlb = cpu_to_le32(cmd_nlb);
>
> -		ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c,
> -								entries, len);
> +		ret = nvme_submit_sync_cmd(dev->admin_q,
> +				(struct nvme_command *)&c, entries, len);
>   		if (ret) {
>   			dev_err(dev->dev, "L2P table transfer failed (%d)\n",
>   									ret);
> @@ -343,8 +344,8 @@ static int nvme_nvm_get_bb_tbl(struct request_queue *q, int lunid,
>
>   	bitmap_zero(bb_bitmap, nr_blocks);
>
> -	ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, bb_bitmap,
> -								bb_bitmap_size);
> +	ret = nvme_submit_sync_cmd(dev->admin_q, (struct nvme_command *)&c,
> +						bb_bitmap, bb_bitmap_size);
>   	if (ret) {
>   		dev_err(dev->dev, "get bad block table failed (%d)\n", ret);
>   		ret = -EIO;
>

Thanks Tao. I've added the bb set as well and a small fix to the l2p.
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