linux-kernel - Re: [PATCH v3 06/15] dmaengine: idxd: Add private_data to struct idxd

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Date:   Mon, 1 May 2023 07:50:02 -0700
From:   Dave Jiang <dave.jiang@...el.com>
To:     Tom Zanussi <tom.zanussi@...ux.intel.com>,
        herbert@...dor.apana.org.au, davem@...emloft.net,
        fenghua.yu@...el.com, vkoul@...nel.org
Cc:     tony.luck@...el.com, wajdi.k.feghali@...el.com,
        james.guilford@...el.com, kanchana.p.sridhar@...el.com,
        giovanni.cabiddu@...el.com, hdanton@...a.com,
        linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        dmaengine@...r.kernel.org
Subject: Re: [PATCH v3 06/15] dmaengine: idxd: Add private_data to struct
 idxd_wq



On 4/28/23 1:55 PM, Tom Zanussi wrote:
> Add a void * to idxd_wqs for user-defined context data, along with
> accessors set_idxd_wq_private() and idxd_wq_private().
> 
> Signed-off-by: Tom Zanussi <tom.zanussi@...ux.intel.com>
Reviewed-by: Dave Jiang <dave.jiang@...el.com>

> ---
>   drivers/dma/idxd/idxd.h | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
> index 719f9f1662ad..0402f97d6ff8 100644
> --- a/drivers/dma/idxd/idxd.h
> +++ b/drivers/dma/idxd/idxd.h
> @@ -216,6 +216,8 @@ struct idxd_wq {
>   	u32 max_batch_size;
>   
>   	char driver_name[WQ_NAME_SIZE + 1];
> +
> +	void *private_data;
>   };
>   
>   struct idxd_engine {
> @@ -550,6 +552,16 @@ static inline int idxd_wq_refcount(struct idxd_wq *wq)
>   	return wq->client_count;
>   };
>   
> +static inline void set_idxd_wq_private(struct idxd_wq *wq, void *private)
> +{
> +	wq->private_data = private;
> +}
> +
> +static inline void *idxd_wq_private(struct idxd_wq *wq)
> +{
> +	return wq->private_data;
> +}
> +
>   /*
>    * Intel IAA does not support batch processing.
>    * The max batch size of device, max batch size of wq and