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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Claudiu Manoil , Alexandre Belloni , UNGLinuxDriver@microchip.com, Colin Foster , linux-kernel@vger.kernel.org Subject: [PATCH net 3/3] net: mscc: ocelot: add TX_MM_HOLD to ocelot_mm_stats_layout Date: Tue, 21 Mar 2023 03:03:25 +0200 Message-Id: <20230321010325.897817-4-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230321010325.897817-1-vladimir.oltean@nxp.com> References: <20230321010325.897817-1-vladimir.oltean@nxp.com> X-ClientProxiedBy: AS4P195CA0046.EURP195.PROD.OUTLOOK.COM (2603:10a6:20b:65a::27) To AM0PR04MB6452.eurprd04.prod.outlook.com (2603:10a6:208:16d::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM0PR04MB6452:EE_|AS8PR04MB7911:EE_ X-MS-Office365-Filtering-Correlation-Id: 03e8431e-bdaa-435b-a4c0-08db29a81c9b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM0PR04MB6452.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230025)(4636009)(346002)(366004)(136003)(39860400002)(396003)(376002)(451199018)(2616005)(54906003)(86362001)(38100700002)(38350700002)(8936002)(4326008)(8676002)(66476007)(66556008)(36756003)(6916009)(66946007)(2906002)(44832011)(41300700001)(5660300002)(186003)(1076003)(26005)(52116002)(6486002)(6506007)(478600001)(6512007)(316002)(7416002)(6666004);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 03e8431e-bdaa-435b-a4c0-08db29a81c9b X-MS-Exchange-CrossTenant-AuthSource: AM0PR04MB6452.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Mar 2023 01:03:41.5982 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: jVMiIV3jmb5GlBBXmXb8Cf01C/QUx+d8tLYVsS5pJ92RFR/PSc+9eKJiXGVsJ16JV/1TapM/C0z8nXhUVbYqPw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR04MB7911 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1760937906762673681?= X-GMAIL-MSGID: =?utf-8?q?1760937906762673681?= The lack of a definition for this counter is what initially prompted me to investigate a problem which really manifested itself as the previous change, "net: mscc: ocelot: fix transfer from region->buf to ocelot->stats". When TX_MM_HOLD is defined in enum ocelot_stat but not in struct ocelot_stat_layout ocelot_mm_stats_layout, this creates a hole, which due to the aforementioned bug, makes all counters following TX_MM_HOLD be recorded off by one compared to their correct position. So for example, a non-zero TX_PMAC_OCTETS would be reported as TX_MERGE_FRAGMENTS, TX_PMAC_UNICAST would be reported as TX_PMAC_OCTETS, TX_PMAC_64 would be reported as TX_PMAC_PAUSE, etc etc. This is because the size of the hole (1) is much smaller than the size of the region, so the phenomenon where the stats are off-by-one, rather than lost, prevails. However, the phenomenon where stats are lost can be seen too, for example with DROP_LOCAL, which is at the beginning of its own region (offset 0x000400 vs the previous 0x0002b0 constitutes a discontinuity). This is also reported as off by one and saved to TX_PMAC_1527_MAX, but that counter is not reported to the unstructured "ethtool -S", as opposed to DROP_LOCAL which is (as "drop_local"). Fixes: ab3f97a9610a ("net: mscc: ocelot: export ethtool MAC Merge stats for Felix VSC9959") Signed-off-by: Vladimir Oltean --- drivers/net/ethernet/mscc/ocelot_stats.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/mscc/ocelot_stats.c b/drivers/net/ethernet/mscc/ocelot_stats.c index f18371154475..d0e6cd8dbe5c 100644 --- a/drivers/net/ethernet/mscc/ocelot_stats.c +++ b/drivers/net/ethernet/mscc/ocelot_stats.c @@ -274,6 +274,7 @@ static const struct ocelot_stat_layout ocelot_mm_stats_layout[OCELOT_NUM_STATS] OCELOT_STAT(RX_ASSEMBLY_OK), OCELOT_STAT(RX_MERGE_FRAGMENTS), OCELOT_STAT(TX_MERGE_FRAGMENTS), + OCELOT_STAT(TX_MM_HOLD), OCELOT_STAT(RX_PMAC_OCTETS), OCELOT_STAT(RX_PMAC_UNICAST), OCELOT_STAT(RX_PMAC_MULTICAST),