linux-kernel - Re: [PATCH net-next v8 0/4] net: Add Keystone NetCP ethernet driver support

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Message-ID: <54C91FDD.1000009@ti.com>
Date:	Wed, 28 Jan 2015 12:43:57 -0500
From:	Murali Karicheri <m-karicheri2@...com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	David Miller <davem@...emloft.net>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v8 0/4] net: Add Keystone NetCP ethernet driver
 support

On 01/28/2015 11:49 AM, Murali Karicheri wrote:
> On 01/27/2015 05:28 PM, Arnd Bergmann wrote:
>> On Tuesday 20 January 2015 10:53:36 Murali Karicheri wrote:
>>> On 01/19/2015 03:11 PM, David Miller wrote:
>>>> From: Murali Karicheri<m-karicheri2@...com>
>>>> Date: Thu, 15 Jan 2015 19:10:03 -0500
>>>>
>>>>> The Network Coprocessor (NetCP) is a hardware accelerator that
>>>>> processes
>>>>> Ethernet packets. NetCP has a gigabit Ethernet (GbE) subsystem with
>>>>> a ethernet
>>>>> switch sub-module to send and receive packets. NetCP also includes
>>>>> a packet
>>>>> accelerator (PA) module to perform packet classification operations
>>>>> such as
>>>>> header matching, and packet modification operations such as checksum
>>>>> generation. NetCP can also optionally include a Security
>>>>> Accelerator(SA)
>>>>> capable of performing IPSec operations on ingress/egress packets.
>>>>>
>>>>> Keystone SoC's also have a 10 Gigabit Ethernet Subsystem (XGbE) which
>>>>> includes a 3-port Ethernet switch sub-module capable of 10Gb/s and
>>>>> 1Gb/s rates per Ethernet port.
>>>>>
>>>>> Both GBE and XGBE network processors supported using common driver. It
>>>>> is also designed to handle future variants of NetCP.
>>>>
>>>> Series applied to net-next, thanks.
>>> David,
>>>
>>> Thanks a lot for applying this series. This helps us move forward to
>>> work on the next set of patches.
>>
>> Hi Murali,
>>
>> Building an ARM 'allmodconfig' kernel now runs into two separate problems
>> from your driver:
>>
>> - you have two module_init() instances in one module, which conflict.
>>
>> - you have two files that are linked into more than one module, so
>> building
>> both TI_CPSW and TI_KEYSTONE_NETCP in the same kernel fails.
>>
>> The answer to both of these is probably to have separate loadable
>> modules,
>> but you might be able to come up with a different solution.
> Arnd,
>
> Thanks for letting us know. We will look into this.
>
> How do I reproduce this? Is there a defconfig used for allmodconfig? I
> am unable to find one. Any details to reproduce this will be useful.
>
Ok I think I found it.

I did this with next-next branch and it seems to work. I will make 
kernel build to reproduce this.

make ARCH=arm allmodconfig
make uImage;

I am building it now.

Murali
> Thanks.
>
> Murali
>>
>> Arnd
>
>


-- 
Murali Karicheri
Linux Kernel, Texas Instruments
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