netdev - Re: [PATCH RFC 0/3] net: Add driver helper function to determine if checksum is offloadable

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Message-ID: <CALx6S37f8jccJsY4UHo_ZocSO6XFD+8uPMtqjgMOHPA2nOuaWw@mail.gmail.com>
Date:	Thu, 8 Oct 2015 08:48:42 -0700
From:	Tom Herbert <tom@...bertland.com>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	Kernel Team <kernel-team@...com>,
	Or Gerlitz <ogerlitz@...lanox.com>
Subject: Re: [PATCH RFC 0/3] net: Add driver helper function to determine if
 checksum is offloadable

On Thu, Oct 8, 2015 at 8:09 AM, David Woodhouse <dwmw2@...radead.org> wrote:
> On Mon, 2015-10-05 at 16:39 -0700, Tom Herbert wrote:
>> This patch defines a helper function that drivers can call to check
>> if it is able to offload the checksum for a particular packet.
>
> It occurs to me that by itself, this doesn't actually fix the problem.
> We'd then need to go over all drivers which currently use
> NETIF_F_IP_CSUM or NETIF_F_IPV6_CSUM, and convert them. Would that be
> the intention?
>
In time, yes. But in the near future, I would like to be able to state
that NETIF_F_IP_CSUM and NETIF_F_IPV6_CSUM are being deprecated and
that new drivers can only implement NETIF_F_HW_CSUM interface.
Hopefully, this will encourage HW vendors to implement the generic,
non-protocol specific checksum algorithms in new devices.

Tom

> --
> dwmw2
>
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