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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Michal Kubecek , Claudiu Manoil , Vinicius Costa Gomes , Xiaoliang Yang , Kurt Kanzenbach , Rui Sousa , Ferenc Fejes , Pranavi Somisetty , Harini Katakam , Colin Foster , UNGLinuxDriver@microchip.com, Alexandre Belloni , Andrew Lunn , Florian Fainelli Subject: [PATCH v2 net-next 03/12] docs: ethtool-netlink: document interface for MAC Merge layer Date: Wed, 11 Jan 2023 18:16:57 +0200 Message-Id: <20230111161706.1465242-4-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230111161706.1465242-1-vladimir.oltean@nxp.com> References: <20230111161706.1465242-1-vladimir.oltean@nxp.com> X-ClientProxiedBy: BE1P281CA0163.DEUP281.PROD.OUTLOOK.COM (2603:10a6:b10:67::8) To VI1PR04MB5136.eurprd04.prod.outlook.com (2603:10a6:803:55::19) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: VI1PR04MB5136:EE_|DB9PR04MB8462:EE_ X-MS-Office365-Filtering-Correlation-Id: dee1bc98-0e1a-42d5-913a-08daf3ef50fa X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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The rendered htmldocs will be much more verbose due to the kerneldoc references. Signed-off-by: Vladimir Oltean --- v1->v2: patch is new Documentation/networking/ethtool-netlink.rst | 103 +++++++++++++++++++ Documentation/networking/statistics.rst | 1 + 2 files changed, 104 insertions(+) diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index f10f8eb44255..490c2280ce4f 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -223,6 +223,8 @@ Userspace to kernel: ``ETHTOOL_MSG_PSE_SET`` set PSE parameters ``ETHTOOL_MSG_PSE_GET`` get PSE parameters ``ETHTOOL_MSG_RSS_GET`` get RSS settings + ``ETHTOOL_MSG_MM_GET`` get MAC merge layer state + ``ETHTOOL_MSG_MM_SET`` set MAC merge layer parameters ===================================== ================================= Kernel to userspace: @@ -265,6 +267,7 @@ Kernel to userspace: ``ETHTOOL_MSG_MODULE_GET_REPLY`` transceiver module parameters ``ETHTOOL_MSG_PSE_GET_REPLY`` PSE parameters ``ETHTOOL_MSG_RSS_GET_REPLY`` RSS settings + ``ETHTOOL_MSG_MM_GET_REPLY`` MAC merge layer status ======================================== ================================= ``GET`` requests are sent by userspace applications to retrieve device @@ -1716,6 +1719,104 @@ being used. Current supported options are toeplitz, xor or crc32. ETHTOOL_A_RSS_INDIR attribute returns RSS indrection table where each byte indicates queue number. +MM_GET +====== + +Retrieve 802.3 MAC Merge parameters. + +Request contents: + + ==================================== ====== ========================== + ``ETHTOOL_A_MM_HEADER`` nested request header + ==================================== ====== ========================== + +Kernel response contents: + + ================================ ====== =================================== + ``ETHTOOL_A_MM_HEADER`` Nested request header + + ``ETHTOOL_A_MM_SUPPORTED`` Bool set if device supports the MM layer + + ``ETHTOOL_A_MM_PMAC_ENABLED`` Bool set if RX of preemptible and SMD-V + frames is enabled + + ``ETHTOOL_A_MM_TX_ENABLED`` Bool set if TX of preemptible frames is + administratively enabled (might be + inactive if verification failed) + + ``ETHTOOL_A_MM_TX_ACTIVE`` Bool set if TX of preemptible frames is + operationally enabled + + ``ETHTOOL_A_MM_ADD_FRAG_SIZE`` U32 minimum size of transmitted + non-final fragments, in octets + + ``ETHTOOL_A_MM_VERIFY_ENABLED`` Bool set if TX of SMD-V frames is + administratively enabled (TX will + not take place when port is not up) + + ``ETHTOOL_A_MM_VERIFY_STATUS`` U8 state of the Verify function + + ``ETHTOOL_A_MM_VERIFY_TIME`` U32 delay between verification attempts + + ``ETHTOOL_A_MM_MAX_VERIFY_TIME`` U32 maximum interval supported by + device + + ``ETHTOOL_A_MM_STATS`` Nested IEEE 802.3-2018 subclause 30.14.1 + oMACMergeEntity statistics counters + + ================================ ====== =================================== + +If ``ETHTOOL_A_MM_SUPPORTED`` is reported as false, the other netlink +attributes will be absent. + +The attributes are populated by the device driver through the following +structure: + +.. kernel-doc:: include/linux/ethtool.h + :identifiers: ethtool_mm_state + +The ``ETHTOOL_A_MM_VERIFY_STATUS`` will report one of the values from + +.. kernel-doc:: include/uapi/linux/ethtool.h + :identifiers: ethtool_mm_verify_status + +If ``ETHTOOL_A_MM_VERIFY_ENABLED`` was passed as false in the ``MM_SET`` +command, ``ETHTOOL_A_MM_VERIFY_STATUS`` will report either +``ETHTOOL_MM_VERIFY_STATUS_INITIAL`` or ``ETHTOOL_MM_VERIFY_STATUS_DISABLED``, +otherwise it should report one of the other states. + +It is recommended that drivers start with the pMAC disabled, and enable it upon +user space request. It is also recommended that user space does not depend upon +the default values from ``ETHTOOL_MSG_MM_GET`` requests. + +``ETHTOOL_A_MM_STATS`` are reported if ``ETHTOOL_FLAG_STATS`` was set in +``ETHTOOL_A_HEADER_FLAGS``. The attribute will be empty if driver did not +report any statistics. Drivers fill in the statistics in the following +structure: + +.. kernel-doc:: include/linux/ethtool.h + :identifiers: ethtool_mm_stats + +MM_SET +====== + +Modifies the configuration of the 802.3 MAC Merge layer. + +Request contents: + + ====================================== ====== ========================== + ``ETHTOOL_A_MM_VERIFY_TIME`` u32 see MM_GET description + ``ETHTOOL_A_MM_VERIFY_ENABLED`` bool see MM_GET description + ``ETHTOOL_A_MM_TX_ENABLED`` bool see MM_GET description + ``ETHTOOL_A_MM_PMAC_ENABLED`` bool see MM_GET description + ``ETHTOOL_A_MM_ADD_FRAG_SIZE`` u32 see MM_GET description + ====================================== ====== ========================== + +The attributes are propagated to the driver through the following structure: + +.. kernel-doc:: include/linux/ethtool.h + :identifiers: ethtool_mm_cfg + Request translation =================== @@ -1817,4 +1918,6 @@ are netlink only. n/a ``ETHTOOL_MSG_PHC_VCLOCKS_GET`` n/a ``ETHTOOL_MSG_MODULE_GET`` n/a ``ETHTOOL_MSG_MODULE_SET`` + n/a ``ETHTOOL_MSG_MM_GET`` + n/a ``ETHTOOL_MSG_MM_SET`` =================================== ===================================== diff --git a/Documentation/networking/statistics.rst b/Documentation/networking/statistics.rst index c9aeb70dafa2..551b3cc29a41 100644 --- a/Documentation/networking/statistics.rst +++ b/Documentation/networking/statistics.rst @@ -171,6 +171,7 @@ statistics are supported in the following commands: - `ETHTOOL_MSG_PAUSE_GET` - `ETHTOOL_MSG_FEC_GET` + - `ETHTOOL_MSG_MM_GET` debugfs -------