[dpdk-dev] [EXT] Re: [PATCH 00/15] Octeon Tx/Tx2 Endpoint pmd

Pradeep Kumar Nalla pnalla at marvell.com
Wed Jan 6 12:35:53 CET 2021



-----Original Message-----
From: Ferruh Yigit <ferruh.yigit at intel.com> 
Sent: Tuesday, January 5, 2021 8:59 PM
To: Pradeep Kumar Nalla <pnalla at marvell.com>
Cc: Jerin Jacob Kollanukkaran <jerinj at marvell.com>; Satananda Burla <sburla at marvell.com>; dev at dpdk.org
Subject: Re: [EXT] Re: [dpdk-dev] [PATCH 00/15] Octeon Tx/Tx2 Endpoint pmd

On 1/5/2021 2:43 PM, Pradeep Kumar Nalla wrote:

Please do not top post, reply moved below.

> Thanks
> Pradeep.
> -----Original Message-----
> From: Ferruh Yigit <ferruh.yigit at intel.com>
> Sent: Monday, January 4, 2021 5:22 PM
> To: Pradeep Kumar Nalla <pnalla at marvell.com>
> Cc: Jerin Jacob Kollanukkaran <jerinj at marvell.com>; Satananda Burla 
> <sburla at marvell.com>; dev at dpdk.org
> Subject: [EXT] Re: [dpdk-dev] [PATCH 00/15] Octeon Tx/Tx2 Endpoint pmd
> 
> External Email
> 
> ----------------------------------------------------------------------
> On 12/31/2020 7:22 AM, Nalla, Pradeep wrote:
>> From: "Nalla Pradeep" <pnalla at marvell.com>
>>
>> This patch set contains PMD with minimal set of operations that can 
>> drive both Octeon Tx and Tx2 in endpoint.
>>
> 
> Hi Pradeep,
> 
> There is already octeontx and octeontx2 net drivers, what is the difference of the 'endpoint' driver, why it is needed, can you please give more information?
> 
> Hi Ferruh 
> 
> This PMD, while running on a host, drives octeontx/octeontx2 over pci bus, where as "OcteonTx and OcteonTx2 net drivers" run on respective Tx/Tx2 SOCs to make use of h/w blocks present on the SOC.
> 
> But aren't they same HW block, either in the SoC or external ethernet controller via PCI bus?
No, this pmd doesn't access any h/w block on the soc. When in ep mode octeontx and octeontx2 present themselves as network devices and this pmd will program that interface and does packet rx/tx.
> As far as I can see octeontx2 access the device via PCI bus, why updating the existing driver and adding new device IDs is not working?
OxteonTx2 access H/W blocks on soc which also appear as PCI devices.


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