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Tue, 1 Oct 2024 18:03:12 +0000 Message-ID: <4e89dd84-eadc-4cae-8892-c33688cc051f@intel.com> Date: Tue, 1 Oct 2024 11:03:10 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next 00/15] net: sparx5: prepare for lan969x switch driver To: Daniel Machon , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Lars Povlsen , Steen Hegelund , , , , Richard Cochran , , , , CC: , , References: <20241001-b4-sparx5-lan969x-switch-driver-v1-0-8c6896fdce66@microchip.com> Content-Language: en-US From: Jacob Keller In-Reply-To: <20241001-b4-sparx5-lan969x-switch-driver-v1-0-8c6896fdce66@microchip.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: BY3PR10CA0030.namprd10.prod.outlook.com (2603:10b6:a03:255::35) To CO1PR11MB5089.namprd11.prod.outlook.com (2603:10b6:303:9b::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PR11MB5089:EE_|SA2PR11MB4841:EE_ X-MS-Office365-Filtering-Correlation-Id: 8f44059b-94a6-43bc-0255-08dce2435090 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|1800799024|366016|921020; X-Microsoft-Antispam-Message-Info: =?utf-8?B?Y1pVWTdtT2tPV1Z2bktudllxekswZ3ZHbGVlR2JNQ1YwQXo5blZmNFpYQkpv?= =?utf-8?B?S0dCdy9aeVhhTXVCVkU3cTFJYmlsd0l5SlJFb2lmeVMwUlhRK1JBSjFodkxt?= =?utf-8?B?VzRyR1dOeDkzcENDUVlwdGFoeVhNOElFYWlVUEhNQzQ0Q3FhVnBnM3g2WGNw?= =?utf-8?B?WHJvVXROS1RsQy9nOEZ4TURYUGs0K3lWTFMzSzRlWDdlVkdqZkJZczJCdGpk?= =?utf-8?B?RVhEdGFzam9neGVtZ1M1ZnAzV1BYNExrVWNCY2NPeWtzbmdubXZiQlFjKytU?= =?utf-8?B?VUQ4TFkxZXYwbWNFQ1pwT2JhRVQrT2VvT2lVR2twbEVJVUZ0UU5XWkhIUHpZ?= =?utf-8?B?NUZNRnVmSnJMTnRKbk80WGN3eEtIL20xZHlEd3NVbUdwZnNaQ1Y0b1VFYTdh?= =?utf-8?B?cjZ6RUpZTGNnTmU3SFpTRTJIdkR3ZEpQL1NPUWJWNDFFNUNENkJWQllLS3B2?= =?utf-8?B?Um1hYUdvRWsvcDdYWEFQb2FNbGYxUHFMV1F3eXlXWnl6KzlBYlVPWlJBRUpI?= =?utf-8?B?d3YvZXJsc21OWStBR1BkMDBkY3E1VkZPZndVTFEwYVdISDY0Z0xNbm5Oc2o3?= =?utf-8?B?eURyZ0pLN0JlU2xURU1pQ0RBc1lqUUV0VGVsM2RicURiUUlBaUR3QU1ON1Qz?= =?utf-8?B?MFQybnlGa2tFTU1mZHZIUFQ2blFHZnFuVDJBUzhrVWFpNnZPTVMvT21FUWFL?= =?utf-8?B?NWxSZ1IrOXZNYTBObzZNQ2tEeVQxS09sM3hiTSs0QzJ3em5tZUNVZm10cXh3?= =?utf-8?B?UnZzYmFrcXNQYUdDTlpQakF5T2NoSC9ZYUJNM2huZjJHUUh3RTQ4MmdkV0F2?= =?utf-8?B?aWdEcEd4YlA1RUdXZWRMRFdvTHNNdVFreEVnT1R0MXRpL1BLaHpPUmxDYSsr?= =?utf-8?B?RFV0N2ZZVDlUYmJqY3dRaHVFK212UnVEOFBkbWxBdVVsK2sxQlJFalRQUHh2?= =?utf-8?B?WXRIdHoyZy9LclAxMEp5YzRlOGY0Nk1PUEs0TWQ1RWRVUTh2cGtPeG1mamlK?= =?utf-8?B?OG9ySzM3Yzg0RGpNVnlaWHlHT29tSEFVZEJ6ZmRGRFpyZGpUclNyRWMybmNC?= =?utf-8?B?UzN5QzhaODdqUFhWcDlUdko1SzA3OHNuSGpMemVxV3Bmbi9uVitqY0lyd3gv?= =?utf-8?B?SEEzMWNBOVdXMFdOcXVudlNlemZnbXJ0Qjd4d05oMUlnTWhkMDFoVi9pUm1K?= =?utf-8?B?T3AybHNSWk01enlVVTV4MXU5OGFMODhCVzByRWJFU01ySURCU1ZNZldmWkFw?= =?utf-8?B?NFZobXBnRVgwV1l0U3pZTnp4NjB5akg3cGZORWdyUk90L0JiYlk3SkI3S0dQ?= =?utf-8?B?d0xZUlgzQ0RrTUdsZHE5ekNyak1mbVV4Q1JyR3F6MnNlM0RkTVA4Ni9LOHQ2?= =?utf-8?B?U0NwRnJEUUFRZjZ0QmFwaUNhWjQ5MlJvbmJoU2xVZUljZFd4VnVjQVlRNjBt?= =?utf-8?B?MG5CQjh2SWsycHVlNFJ5T1VHV081dmFYMnR2S2labWRQejQyWHVaVXpDdk9W?= =?utf-8?B?eVphay9CVlBQQlRmaGFmNTJKMGVRZmV0K1BySXE5ZVhFZ2FPNHBMRXNMdTVB?= =?utf-8?B?OGVZaWxhZzMxUVpQZElTMFpNVFlpaGpYZENpVS90SDhwVkZidWsvU2o5VkVp?= =?utf-8?B?SzBjTjU5dmtjdUltYVJoNEZwUExXL21wN0tLcnFCNFZGQ0NXSjNNcjEwRFBt?= =?utf-8?B?L1VKVjBRM0NYT1JZR1JEcjcxaW9SS2RiSG5oM3dNL3NESVlvR2dWY0hUM3pD?= =?utf-8?Q?BfDzHV4OQQr6MfuF5Wyi5O5Qwi5ed0z+ejBX2TD?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CO1PR11MB5089.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(7416014)(1800799024)(366016)(921020);DIR:OUT;SFP:1101; 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FDMA and VCAP) > 3) Add support for lan969x FDMA > 4) Add support for lan969x VCAP > > == Lan969x in short: > > The lan969x Ethernet switch family [1] provides a rich set of > switching features and port configurations (up to 30 ports) from 10Mbps > to 10Gbps, with support for RGMII, SGMII, QSGMII, USGMII, and USXGMII, > ideal for industrial & process automation infrastructure applications, > transport, grid automation, power substation automation, and ring & > intra-ring topologies. The LAN969x family is hardware and software > compatible and scalable supporting 46Gbps to 102Gbps switch bandwidths. > > == Preparing Sparx5 for lan969x: > > The lan969x switch chip reuses many of the IP's of the Sparx5 switch > chip, therefore it has been decided to add support through the existing > Sparx5 driver, in order to avoid a bunch of duplicate code. However, in > order to reuse the Sparx5 switch driver, we have to introduce some > mechanisms to handle the chip differences that are there. These > mechanisms are: > > - Platform match data to contain all the differences that needs to > be handled (constants, ops etc.) > > - Register macro indirection layer so that we can reuse the existing > register macros. > > - Function for branching out on platform type where required. > > In some places we ops out functions and in other places we branch on the > chip type. Exactly when we choose one over the other, is an estimate in > each case. > > After this series is applied, the Sparx5 driver will be prepared for > lan969x and still function exactly as before. > > == Patch breakdown: > > Patch #1 adds private match data > > Patch #2 adds register macro indirection layer > > Patch #3-#5 does some preparation work > > Patch #6-#8 adds chip constants and updates the code to use them > > Patch #9-#14 adds and uses ops for handling functions differently on the > two platforms. > > Patch #15 adds and uses a macro for branching out on the chip type > > [1] https://www.microchip.com/en-us/product/lan9698 > The series seems ok to me. I'm not personally a fan of the implicit local variables used by macros. I do not know how common that is, or what others on the list feel about this. For everything else: Reviewed-by: Jacob Keller