linux-kernel - Re: [PATCH net-next v2 4/7] net: ti: icssg-prueth: Add support for HSR frame forward offload

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Message-ID: <c1125924-bf7b-46c5-89d0-e15a330af58c@ti.com>
Date: Wed, 14 Aug 2024 20:24:45 +0530
From: "Anwar, Md Danish" <a0501179@...com>
To: Andrew Lunn <andrew@...n.ch>, MD Danish Anwar <danishanwar@...com>
CC: Dan Carpenter <dan.carpenter@...aro.org>,
        Jan Kiszka
	<jan.kiszka@...mens.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Javier
 Carrasco <javier.carrasco.cruz@...il.com>,
        Jacob Keller
	<jacob.e.keller@...el.com>,
        Diogo Ivo <diogo.ivo@...mens.com>, Simon Horman
	<horms@...nel.org>,
        Richard Cochran <richardcochran@...il.com>,
        Paolo Abeni
	<pabeni@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet
	<edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>,
        Roger Quadros
	<rogerq@...nel.org>
Subject: Re: [PATCH net-next v2 4/7] net: ti: icssg-prueth: Add support for
 HSR frame forward offload



On 8/14/2024 7:32 PM, Andrew Lunn wrote:
>> Yes, the icssg_init_ and many other APIs are common for switch and hsr.
>> They can be renamed to indicate that as well.
>>
>> How does icssg_init_switch_or_hsr_mode() sound?
> 
> I would say it is too long. And when you add the next thing, say
> bonding, will it become icssg_init_switch_or_hsr_or_bond_mode()?
> 
> Maybe name the function after what it actually does, not why you call
> it.
> 

Sure Andrew, I will try to come up with a proper name for these APIs.

>>>>  static struct icssg_firmwares icssg_switch_firmwares[] = {
>>>>  	{
>>>>  		.pru = "ti-pruss/am65x-sr2-pru0-prusw-fw.elf",
>>>> @@ -152,6 +168,8 @@ static int prueth_emac_start(struct prueth *prueth, struct prueth_emac *emac)
>>>>  
>>>>  	if (prueth->is_switch_mode)
>>>>  		firmwares = icssg_switch_firmwares;
>>>> +	else if (prueth->is_hsr_offload_mode)
>>>> +		firmwares = icssg_hsr_firmwares;
>>>
>>> Documentation/networking/netdev-features.rst
>>>
>>> * hsr-fwd-offload
>>>
>>> This should be set for devices which forward HSR (High-availability Seamless
>>> Redundancy) frames from one port to another in hardware.
>>>
>>> To me, this suggests if the flag is not set, you should keep in dual
>>> EMACS or switchdev mode and perform HSR in software.
>>
>>
>> Correct. This is the expected behavior. If the flag is not set we remain
>> in dual EMAC firmware and do HSR in software. Please see
>> prueth_hsr_port_link() for detail on this.
> 
> O.K.
> 
> 	Andrew

-- 
Thanks and Regards,
Md Danish Anwar