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Thu, 4 Jun 2026 19:05:11 +0000 Message-ID: <65617cc3-5e3d-468e-a444-db7e839320c8@intel.com> Date: Thu, 4 Jun 2026 12:05:08 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats To: , CC: , , , , , , , , , , , References: <20260604083037.24407-1-muhammad.nazim.amirul.nazle.asmade@altera.com> Content-Language: en-US From: Jacob Keller In-Reply-To: <20260604083037.24407-1-muhammad.nazim.amirul.nazle.asmade@altera.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0218.namprd03.prod.outlook.com (2603:10b6:303:b9::13) To DS0PR11MB7381.namprd11.prod.outlook.com (2603:10b6:8:134::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR11MB7381:EE_|SJ0PR11MB8293:EE_ X-MS-Office365-Filtering-Correlation-Id: b456b798-f95a-4fc6-1eda-08dec26c33b0 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|366016|376014|56012099006|22082099003|18002099003|11063799006; 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This allows > users to observe L3/L4 filter hit rates via ethtool -S. > > Signed-off-by: Rohan G Thomas > Signed-off-by: Nazim Amirul > --- > drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h | 2 ++ > drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c | 6 ++++++ > 2 files changed, 8 insertions(+) > > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h > index 51943705a2b0..95fdf3133208 100644 > --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h > +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h > @@ -429,6 +429,8 @@ > #define XGMAC_TDES3_VLTV BIT(16) > #define XGMAC_TDES3_VT GENMASK(15, 0) > #define XGMAC_TDES3_FL GENMASK(14, 0) > +#define XGMAC_RDES2_L4FM BIT(28) > +#define XGMAC_RDES2_L3FM BIT(27) > #define XGMAC_RDES2_HL GENMASK(9, 0) > #define XGMAC_RDES3_OWN BIT(31) > #define XGMAC_RDES3_CTXT BIT(30) > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c > index b5f200a87484..6719ac6e395b 100644 > --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c > +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c > @@ -27,6 +27,7 @@ static int dwxgmac2_get_rx_status(struct stmmac_extra_stats *x, > struct dma_desc *p) > { > u32 rdes3 = le32_to_cpu(p->des3); > + u32 rdes2 = le32_to_cpu(p->des2); > > if (unlikely(rdes3 & XGMAC_RDES3_OWN)) > return dma_own; > @@ -37,6 +38,11 @@ static int dwxgmac2_get_rx_status(struct stmmac_extra_stats *x, > if (unlikely((rdes3 & XGMAC_RDES3_ES) && (rdes3 & XGMAC_RDES3_LD))) > return discard_frame; > > + if (rdes2 & XGMAC_RDES2_L3FM) > + x->l3_filter_match++; > + if (rdes2 & XGMAC_RDES2_L4FM) > + x->l4_filter_match++; > + > return good_frame; > } > Right. The l3_filter_match and l4_filter_match already get reported in stmmac_ethtool.c Reviewed-by: Jacob Keller