linux-kernel - Re: [PATCH v8 net-next 3/4] net: enetc: add LSO support for i.MX95 ENETC PF

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <48f2de4d-1695-4d8d-834d-b306b17e09a1@intel.com>
Date: Wed, 18 Dec 2024 15:30:03 +0100
From: Alexander Lobakin <aleksander.lobakin@...el.com>
To: Wei Fang <wei.fang@....com>
CC: Claudiu Manoil <claudiu.manoil@....com>, Vladimir Oltean
	<vladimir.oltean@....com>, Clark Wang <xiaoning.wang@....com>,
	"andrew+netdev@...n.ch" <andrew+netdev@...n.ch>, "davem@...emloft.net"
	<davem@...emloft.net>, "edumazet@...gle.com" <edumazet@...gle.com>,
	"kuba@...nel.org" <kuba@...nel.org>, "pabeni@...hat.com" <pabeni@...hat.com>,
	Frank Li <frank.li@....com>, "horms@...nel.org" <horms@...nel.org>,
	"idosch@...sch.org" <idosch@...sch.org>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "imx@...ts.linux.dev" <imx@...ts.linux.dev>
Subject: Re: [PATCH v8 net-next 3/4] net: enetc: add LSO support for i.MX95
 ENETC PF

From: Wei Fang <wei.fang@....com>
Date: Wed, 18 Dec 2024 03:06:06 +0000

>>> +static inline int enetc_lso_count_descs(const struct sk_buff *skb) {
>>> +	/* 4 BDs: 1 BD for LSO header + 1 BD for extended BD + 1 BD
>>> +	 * for linear area data but not include LSO header, namely
>>> +	 * skb_headlen(skb) - lso_hdr_len. And 1 BD for gap.

[...]

>>> +					 ((first) & SILSOSFMR0_TCP_1ST_SEG))
>>> +
>>> +#define ENETC4_SILSOSFMR1		0x1304
>>> +#define  SILSOSFMR1_TCP_LAST_SEG	GENMASK(11, 0)
>>> +#define   TCP_FLAGS_FIN			BIT(0)
>>> +#define   TCP_FLAGS_SYN			BIT(1)
>>> +#define   TCP_FLAGS_RST			BIT(2)
>>> +#define   TCP_FLAGS_PSH			BIT(3)
>>> +#define   TCP_FLAGS_ACK			BIT(4)
>>> +#define   TCP_FLAGS_URG			BIT(5)
>>> +#define   TCP_FLAGS_ECE			BIT(6)
>>> +#define   TCP_FLAGS_CWR			BIT(7)
>>> +#define   TCP_FLAGS_NS			BIT(8)
>>
>> Why are you open-coding these if they're present in uapi/linux/tcp.h?
> 
> Okay, I will add 'ENETC' prefix.

You don't need to add a prefix, you need to just use the generic
definitions from the abovementioned file.

>>
>>> +/* According to tso_build_hdr(), clear all special flags for not last
>>> +packet. */
>>
>> But this mask is used only to do a writel(), I don't see it anywhere clearing
>> anything...

Thanks,
Olek