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Mon, 24 May 2021 14:19:56 +0000 Received: from HQMAIL107.nvidia.com (172.20.187.13) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 24 May 2021 14:19:55 +0000 Received: from vdi.nvidia.com (172.20.145.6) by mail.nvidia.com (172.20.187.13) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 24 May 2021 14:19:53 +0000 From: Moshe Shemesh To: Michal Kubecek , Andrew Lunn , "Jakub Kicinski" , Don Bollinger , CC: Vladyslav Tarasiuk , Moshe Shemesh Subject: [PATCH ethtool v2 0/4] Extend module EEPROM API Date: Mon, 24 May 2021 17:18:56 +0300 Message-ID: <1621865940-287332-1-git-send-email-moshe@nvidia.com> X-Mailer: git-send-email 1.8.4.3 MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: ef0e943d-4789-44b0-8888-08d91ebf01c9 X-MS-TrafficTypeDiagnostic: CH2PR12MB3957: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6790; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; 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DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 May 2021 14:19:56.5268 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ef0e943d-4789-44b0-8888-08d91ebf01c9 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.112.34]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT059.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB3957 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Ethtool supports module EEPROM dumps via the `ethtool -m ` command. But in current state its functionality is limited - offset and length parameters, which are used to specify a linear desired region of EEPROM data to dump, is not enough, considering emergence of complex module EEPROM layouts such as CMIS 4.0. Moreover, CMIS 4.0 extends the amount of pages that may be accessible by introducing another parameter for page addressing - banks. Besides, currently module EEPROM is represented as a chunk of concatenated pages, where lower 128 bytes of all pages, except page 00h, are omitted. Offset and length are used to address parts of this fake linear memory. But in practice drivers, which implement get_module_info() and get_module_eeprom() ethtool ops still calculate page number and set I2C address on their own. This series adds support in `ethtool -m` of dumping an arbitrary page specified by page number, bank number and I2C address. Implement netlink handler for `ethtool -m` in order to make such requests to the kernel and extend CLI by adding corresponding parameters. New command line format: ethtool -m [hex on|off] [raw on|off] [offset N] [length N] [page N] [bank N] [i2c N] Netlink infrastructure works on per-page basis and allows dumps of a single page at once. But in case user requests human-readable output, which currently may require more than one page, userspace can make such additional calls to kernel on demand and place pages in a linked list. It allows to get pages from cache on demand and pass them to refactored SFF decoders. Change Log: v1 -> v2: - Changed offset defines to specification values. - Added default offset value (128) if page number is specified. - Fixed return values. - Removed page_available() Vladyslav Tarasiuk (4): ethtool: Add netlink handler for getmodule (-m) ethtool: Refactor human-readable module EEPROM output for new API ethtool: Rename QSFP-DD identifiers to use CMIS 4.0 ethtool: Update manpages to reflect changes to getmodule (-m) command Makefile.am | 3 +- qsfp-dd.c => cmis4.c | 220 +++++++++++---------- cmis4.h | 128 +++++++++++++ ethtool.8.in | 14 ++ ethtool.c | 4 + internal.h | 12 ++ list.h | 34 ++++ netlink/desc-ethtool.c | 13 ++ netlink/extapi.h | 2 + netlink/module-eeprom.c | 416 ++++++++++++++++++++++++++++++++++++++++ qsfp-dd.h | 29 +-- qsfp.c | 130 +++++++------ qsfp.h | 51 ++--- sff-common.c | 3 + sff-common.h | 3 +- 15 files changed, 870 insertions(+), 192 deletions(-) rename qsfp-dd.c => cmis4.c (55%) create mode 100644 cmis4.h create mode 100644 list.h create mode 100644 netlink/module-eeprom.c