netdev - Re: [PATCH net-next V1 2/2] net/mlx4_en: Add netdev support for TCP/IP offloads of vxlan tunneling

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Date:	Sun, 22 Dec 2013 17:05:58 +0200
From:	Or Gerlitz <ogerlitz@...lanox.com>
To:	Joe Perches <joe@...ches.com>
CC:	<davem@...emloft.net>, <netdev@...r.kernel.org>,
	<amirv@...lanox.com>, <yanb@...lanox.com>, <ast@...mgrid.com>,
	Matan Barak <matanb@...lanox.com>
Subject: Re: [PATCH net-next V1 2/2] net/mlx4_en: Add netdev support for TCP/IP
 offloads of vxlan tunneling

On 22/12/2013 16:52, Joe Perches wrote:
> On Sun, 2013-12-22 at 16:45 +0200, Or Gerlitz wrote:
>> On 22/12/2013 16:19, Joe Perches wrote:
>>> On Sun, 2013-12-22 at 16:00 +0200, Or Gerlitz wrote:
>>> trivia:
> []
>>>> @@ -68,6 +68,12 @@ void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
>>>>    	context->db_rec_addr = cpu_to_be64(priv->res.db.dma << 2);
>>>>    	if (!(dev->features & NETIF_F_HW_VLAN_CTAG_RX))
>>>>    		context->param3 |= cpu_to_be32(1 << 30);
>>>> +
>>>> +	if (!is_tx && !rss &&
>>>> +	    (mdev->dev->caps.tunnel_offload_mode ==  MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)) {
>>>> +		en_dbg(HW, priv, "Setting RX qp %x tunnel mode to RX tunneled & non-tunneled\n", qpn);
>>>> +		context->srqn |= cpu_to_be32(7 << 28); /* this fills bits 30:28 */
>>> Is that bit setting 0 based or 1 based?
>> 1 based, any issue with that?
> No, but if it's 1 based, doesn't this fill bits 31:29 ?

oops, sorry, I was wrongly reading your question... the setting is 0 
index based, and hence we fill bits 30:28
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