linux-kernel - Re: [PATCH v4 04/10] net: eth: altera: add optional function to start tx dma

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Date:   Thu, 23 Jul 2020 11:35:04 -0500
From:   Thor Thayer <thor.thayer@...ux.intel.com>
To:     "Ooi, Joyce" <joyce.ooi@...el.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dalon Westergreen <dalon.westergreen@...ux.intel.com>,
        Tan Ley Foon <ley.foon.tan@...el.com>,
        See Chin Liang <chin.liang.see@...el.com>,
        Dinh Nguyen <dinh.nguyen@...el.com>,
        Dalon Westergreen <dalon.westergreen@...el.com>
Subject: Re: [PATCH v4 04/10] net: eth: altera: add optional function to start
 tx dma

On 7/8/20 2:23 AM, Ooi, Joyce wrote:
> From: Dalon Westergreen <dalon.westergreen@...el.com>
> 
> Allow for optional start up of tx dma if the start_txdma
> function is defined in altera_dmaops.
> 
> Signed-off-by: Dalon Westergreen <dalon.westergreen@...el.com>
> Signed-off-by: Joyce Ooi <joyce.ooi@...el.com>
> ---
> v2: no change
> v3: no change
> v4: no change
> ---
>   drivers/net/ethernet/altera/altera_tse.h      | 1 +
>   drivers/net/ethernet/altera/altera_tse_main.c | 5 +++++
>   2 files changed, 6 insertions(+)
> 
> diff --git a/drivers/net/ethernet/altera/altera_tse.h b/drivers/net/ethernet/altera/altera_tse.h
> index 7d0c98fc103e..26c5541fda27 100644
> --- a/drivers/net/ethernet/altera/altera_tse.h
> +++ b/drivers/net/ethernet/altera/altera_tse.h
> @@ -401,6 +401,7 @@ struct altera_dmaops {
>   	int (*init_dma)(struct altera_tse_private *priv);
>   	void (*uninit_dma)(struct altera_tse_private *priv);
>   	void (*start_rxdma)(struct altera_tse_private *priv);
> +	void (*start_txdma)(struct altera_tse_private *priv);
>   };
>   
>   /* This structure is private to each device.
> diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c
> index a3749ffdcac9..0a724e4d2c8c 100644
> --- a/drivers/net/ethernet/altera/altera_tse_main.c
> +++ b/drivers/net/ethernet/altera/altera_tse_main.c
> @@ -1244,6 +1244,9 @@ static int tse_open(struct net_device *dev)
>   
>   	priv->dmaops->start_rxdma(priv);
>   
> +	if (priv->dmaops->start_txdma)
> +		priv->dmaops->start_txdma(priv);
> +
>   	/* Start MAC Rx/Tx */
>   	spin_lock(&priv->mac_cfg_lock);
>   	tse_set_mac(priv, true);
> @@ -1646,6 +1649,7 @@ static const struct altera_dmaops altera_dtype_sgdma = {
>   	.init_dma = sgdma_initialize,
>   	.uninit_dma = sgdma_uninitialize,
>   	.start_rxdma = sgdma_start_rxdma,
> +	.start_txdma = NULL,
>   };
>   
>   static const struct altera_dmaops altera_dtype_msgdma = {
> @@ -1665,6 +1669,7 @@ static const struct altera_dmaops altera_dtype_msgdma = {
>   	.init_dma = msgdma_initialize,
>   	.uninit_dma = msgdma_uninitialize,
>   	.start_rxdma = msgdma_start_rxdma,
> +	.start_txdma = NULL,
>   };
>   
>   static const struct of_device_id altera_tse_ids[] = {
> 
Reviewed-by: Thor Thayer <thor.thayer@...ux.intel.com>