From patchwork Mon Jun 21 07:50:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ido Schimmel X-Patchwork-Id: 12334049 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7209DC49EA2 for ; Mon, 21 Jun 2021 07:51:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 54D1561026 for ; Mon, 21 Jun 2021 07:51:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230211AbhFUHx4 (ORCPT ); Mon, 21 Jun 2021 03:53:56 -0400 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:40377 "EHLO out4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230157AbhFUHxz (ORCPT ); Mon, 21 Jun 2021 03:53:55 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id 14BAC5C00EF; Mon, 21 Jun 2021 03:51:41 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Mon, 21 Jun 2021 03:51:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm3; bh=6p/StMXboIAg7jqu380mvcof9Sg6eZG5FarLaVS9wkg=; b=EsjYS9g7 +NWVv0HzSoUMs3t5ZZTn5FIKdUWLtJulql2MXnlRMpz9ur6g2cqQ5jw66gcXniJw 7cn9/+Vs+6+cp91vCdCOGr/DhJyd17GZi1JDuC88uG0M94aeXJ1925tz6NDkbRkx rykRNKizVBu4Btr7Rgk9wNd922zlSvDp5GQA3/zZqMgvE1gOyi7cJqb60PIBnWQ1 UkfglalNjauybdncYDD2z2CUPZ/9xm/mALa4oF7OLO2uddn23e4HUCj9PZWGIN84 yHOTQKHhk+ZoHT4sRyxogHRMr0N3jsuXhDTsV3zIcisjI0PlT34kMGF+GAHFpGLj HOG3MqzJ05+qEQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrfeefkedguddvudcutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtke ertdertddtnecuhfhrohhmpefkughoucfutghhihhmmhgvlhcuoehiughoshgthhesihgu ohhstghhrdhorhhgqeenucggtffrrghtthgvrhhnpeduteeiveffffevleekleejffekhf ekhefgtdfftefhledvjefggfehgfevjeekhfenucevlhhushhtvghrufhiiigvpedtnecu rfgrrhgrmhepmhgrihhlfhhrohhmpehiughoshgthhesihguohhstghhrdhorhhg X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 21 Jun 2021 03:51:38 -0400 (EDT) From: Ido Schimmel To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, jiri@nvidia.com, vadimp@nvidia.com, mlxsw@nvidia.com, Ido Schimmel Subject: [PATCH net-next 3/3] mlxsw: core: Add support for module EEPROM read by page Date: Mon, 21 Jun 2021 10:50:41 +0300 Message-Id: <20210621075041.2502416-4-idosch@idosch.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210621075041.2502416-1-idosch@idosch.org> References: <20210621075041.2502416-1-idosch@idosch.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Ido Schimmel Add support for ethtool_ops::get_module_eeprom_by_page() which allows user space to read transceiver module EEPROM based on passed parameters. The I2C address is not validated in order to avoid module-specific code. In case of wrong address, error will be returned from device's firmware. Tested by comparing output with legacy method (ioctl) output. Signed-off-by: Ido Schimmel Tested-by: Vadim Pasternak Reviewed-by: Jiri Pirko --- .../net/ethernet/mellanox/mlxsw/core_env.c | 74 +++++++++++++++++++ .../net/ethernet/mellanox/mlxsw/core_env.h | 7 ++ drivers/net/ethernet/mellanox/mlxsw/minimal.c | 13 ++++ .../mellanox/mlxsw/spectrum_ethtool.c | 14 ++++ 4 files changed, 108 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.c b/drivers/net/ethernet/mellanox/mlxsw/core_env.c index b3ca5bd33a7f..4a0dbdb6730b 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core_env.c +++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.c @@ -3,6 +3,7 @@ #include #include +#include #include #include "core.h" @@ -315,6 +316,79 @@ int mlxsw_env_get_module_eeprom(struct net_device *netdev, } EXPORT_SYMBOL(mlxsw_env_get_module_eeprom); +static int mlxsw_env_mcia_status_process(const char *mcia_pl, + struct netlink_ext_ack *extack) +{ + u8 status = mlxsw_reg_mcia_status_get(mcia_pl); + + switch (status) { + case MLXSW_REG_MCIA_STATUS_GOOD: + return 0; + case MLXSW_REG_MCIA_STATUS_NO_EEPROM_MODULE: + NL_SET_ERR_MSG_MOD(extack, "No response from module's EEPROM"); + return -EIO; + case MLXSW_REG_MCIA_STATUS_MODULE_NOT_SUPPORTED: + NL_SET_ERR_MSG_MOD(extack, "Module type not supported by the device"); + return -EOPNOTSUPP; + case MLXSW_REG_MCIA_STATUS_MODULE_NOT_CONNECTED: + NL_SET_ERR_MSG_MOD(extack, "No module present indication"); + return -EIO; + case MLXSW_REG_MCIA_STATUS_I2C_ERROR: + NL_SET_ERR_MSG_MOD(extack, "Error occurred while trying to access module's EEPROM using I2C"); + return -EIO; + case MLXSW_REG_MCIA_STATUS_MODULE_DISABLED: + NL_SET_ERR_MSG_MOD(extack, "Module is disabled"); + return -EIO; + default: + NL_SET_ERR_MSG_MOD(extack, "Unknown error"); + return -EIO; + } +} + +int +mlxsw_env_get_module_eeprom_by_page(struct mlxsw_core *mlxsw_core, u8 module, + const struct ethtool_module_eeprom *page, + struct netlink_ext_ack *extack) +{ + u32 bytes_read = 0; + u16 device_addr; + + /* Offset cannot be larger than 2 * ETH_MODULE_EEPROM_PAGE_LEN */ + device_addr = page->offset; + + while (bytes_read < page->length) { + char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE]; + char mcia_pl[MLXSW_REG_MCIA_LEN]; + u8 size; + int err; + + size = min_t(u8, page->length - bytes_read, + MLXSW_REG_MCIA_EEPROM_SIZE); + + mlxsw_reg_mcia_pack(mcia_pl, module, 0, page->page, + device_addr + bytes_read, size, + page->i2c_address); + mlxsw_reg_mcia_bank_number_set(mcia_pl, page->bank); + + err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcia), mcia_pl); + if (err) { + NL_SET_ERR_MSG_MOD(extack, "Failed to access module's EEPROM"); + return err; + } + + err = mlxsw_env_mcia_status_process(mcia_pl, extack); + if (err) + return err; + + mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp); + memcpy(page->data + bytes_read, eeprom_tmp, size); + bytes_read += size; + } + + return bytes_read; +} +EXPORT_SYMBOL(mlxsw_env_get_module_eeprom_by_page); + static int mlxsw_env_module_has_temp_sensor(struct mlxsw_core *mlxsw_core, u8 module, bool *p_has_temp_sensor) diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.h b/drivers/net/ethernet/mellanox/mlxsw/core_env.h index 2b23f8a87862..0bf5bd0f8a7e 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/core_env.h +++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.h @@ -4,6 +4,8 @@ #ifndef _MLXSW_CORE_ENV_H #define _MLXSW_CORE_ENV_H +#include + struct ethtool_modinfo; struct ethtool_eeprom; @@ -17,6 +19,11 @@ int mlxsw_env_get_module_eeprom(struct net_device *netdev, struct mlxsw_core *mlxsw_core, int module, struct ethtool_eeprom *ee, u8 *data); +int +mlxsw_env_get_module_eeprom_by_page(struct mlxsw_core *mlxsw_core, u8 module, + const struct ethtool_module_eeprom *page, + struct netlink_ext_ack *extack); + int mlxsw_env_module_overheat_counter_get(struct mlxsw_core *mlxsw_core, u8 module, u64 *p_counter); diff --git a/drivers/net/ethernet/mellanox/mlxsw/minimal.c b/drivers/net/ethernet/mellanox/mlxsw/minimal.c index 68102726c6a7..d9d56c44e994 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/minimal.c +++ b/drivers/net/ethernet/mellanox/mlxsw/minimal.c @@ -112,10 +112,23 @@ mlxsw_m_get_module_eeprom(struct net_device *netdev, struct ethtool_eeprom *ee, ee, data); } +static int +mlxsw_m_get_module_eeprom_by_page(struct net_device *netdev, + const struct ethtool_module_eeprom *page, + struct netlink_ext_ack *extack) +{ + struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev); + struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core; + + return mlxsw_env_get_module_eeprom_by_page(core, mlxsw_m_port->module, + page, extack); +} + static const struct ethtool_ops mlxsw_m_port_ethtool_ops = { .get_drvinfo = mlxsw_m_module_get_drvinfo, .get_module_info = mlxsw_m_get_module_info, .get_module_eeprom = mlxsw_m_get_module_eeprom, + .get_module_eeprom_by_page = mlxsw_m_get_module_eeprom_by_page, }; static int diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ethtool.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ethtool.c index c8061beed6db..267590a0eee7 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ethtool.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ethtool.c @@ -1050,6 +1050,19 @@ static int mlxsw_sp_get_module_eeprom(struct net_device *netdev, return err; } +static int +mlxsw_sp_get_module_eeprom_by_page(struct net_device *dev, + const struct ethtool_module_eeprom *page, + struct netlink_ext_ack *extack) +{ + struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev); + struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; + u8 module = mlxsw_sp_port->mapping.module; + + return mlxsw_env_get_module_eeprom_by_page(mlxsw_sp->core, module, page, + extack); +} + static int mlxsw_sp_get_ts_info(struct net_device *netdev, struct ethtool_ts_info *info) { @@ -1199,6 +1212,7 @@ const struct ethtool_ops mlxsw_sp_port_ethtool_ops = { .set_link_ksettings = mlxsw_sp_port_set_link_ksettings, .get_module_info = mlxsw_sp_get_module_info, .get_module_eeprom = mlxsw_sp_get_module_eeprom, + .get_module_eeprom_by_page = mlxsw_sp_get_module_eeprom_by_page, .get_ts_info = mlxsw_sp_get_ts_info, .get_eth_phy_stats = mlxsw_sp_get_eth_phy_stats, .get_eth_mac_stats = mlxsw_sp_get_eth_mac_stats,