linux-kernel - RE: [Intel-wired-lan] [PATCH iwl-net v1] igc: Use 5KB TX packet buffer per queue for TSN mode

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: <IA3PR11MB898696FA859625A437E07A04E5D8A@IA3PR11MB8986.namprd11.prod.outlook.com>
Date: Tue, 2 Dec 2025 08:35:46 +0000
From: "Loktionov, Aleksandr" <aleksandr.loktionov@...el.com>
To: "Choong, Chwee Lin" <chwee.lin.choong@...el.com>, "Nguyen, Anthony L"
	<anthony.l.nguyen@...el.com>, "Kitszel, Przemyslaw"
	<przemyslaw.kitszel@...el.com>, Andrew Lunn <andrew+netdev@...n.ch>, "David S
 . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, "Jakub
 Kicinski" <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
CC: "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Bouska,
 JacquelynnX" <jacquelynnx.bouska@...el.com>, "Bouska, Zdenek"
	<zdenek.bouska@...mens.com>, Faizal Rahim
	<faizal.abdul.rahim@...ux.intel.com>
Subject: RE: [Intel-wired-lan] [PATCH iwl-net v1] igc: Use 5KB TX packet
 buffer per queue for TSN mode



> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf
> Of Chwee-Lin Choong
> Sent: Tuesday, December 2, 2025 1:24 PM
> To: Nguyen, Anthony L <anthony.l.nguyen@...el.com>; Kitszel,
> Przemyslaw <przemyslaw.kitszel@...el.com>; Andrew Lunn
> <andrew+netdev@...n.ch>; David S . Miller <davem@...emloft.net>; Eric
> Dumazet <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo
> Abeni <pabeni@...hat.com>
> Cc: intel-wired-lan@...ts.osuosl.org; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org; Bouska; Bouska, Zdenek
> <zdenek.bouska@...mens.com>; Faizal Rahim
> <faizal.abdul.rahim@...ux.intel.com>
> Subject: [Intel-wired-lan] [PATCH iwl-net v1] igc: Use 5KB TX packet
> buffer per queue for TSN mode
> 
> Update IGC_TXPBSIZE_TSN to allocate 5KB per TX queue (TXQ0-TXQ3) as
> recommended in I225/I226 SW User Manual Section 7.5.4 for TSN
> operation.
> 
> Fixes: 0d58cdc902da ("igc: optimize TX packet buffer utilization for
> TSN mode")
> Reported-by: Bouska, Zdenek <zdenek.bouska@...mens.com>
> Closes:
> https://lore.kernel.org/netdev/AS1PR10MB5675DBFE7CE5F2A9336ABFA4EBEAA@
> AS1PR10MB5675.EURPRD10.PROD.OUTLOOK.COM/
> Signed-off-by: Chwee-Lin Choong <chwee.lin.choong@...el.com>
> ---
>  drivers/net/ethernet/intel/igc/igc_defines.h | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h
> b/drivers/net/ethernet/intel/igc/igc_defines.h
> index 498ba1522ca4..9482ab11f050 100644
> --- a/drivers/net/ethernet/intel/igc/igc_defines.h
> +++ b/drivers/net/ethernet/intel/igc/igc_defines.h
> @@ -443,9 +443,10 @@
>  #define IGC_TXPBSIZE_DEFAULT ( \
>  	IGC_TXPB0SIZE(20) | IGC_TXPB1SIZE(0) | IGC_TXPB2SIZE(0) | \
>  	IGC_TXPB3SIZE(0) | IGC_OS2BMCPBSIZE(4))
> +/* TSN value following I225/I226 SW User Manual Section 7.5.4 */
>  #define IGC_TXPBSIZE_TSN ( \
> -	IGC_TXPB0SIZE(7) | IGC_TXPB1SIZE(7) | IGC_TXPB2SIZE(7) | \
> -	IGC_TXPB3SIZE(7) | IGC_OS2BMCPBSIZE(4))
> +	IGC_TXPB0SIZE(5) | IGC_TXPB1SIZE(5) | IGC_TXPB2SIZE(5) | \
> +	IGC_TXPB3SIZE(5) | IGC_OS2BMCPBSIZE(4))
> 
>  #define IGC_DTXMXPKTSZ_TSN	0x19 /* 1600 bytes of max TX DMA packet
> size */
>  #define IGC_DTXMXPKTSZ_DEFAULT	0x98 /* 9728-byte Jumbo frames */
> --
> 2.43.0

Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>