From patchwork Thu Mar 4 18:57:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Moshe Shemesh X-Patchwork-Id: 12116669 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 27639C4332B for ; Thu, 4 Mar 2021 18:59:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DAA5E64F64 for ; Thu, 4 Mar 2021 18:58:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235867AbhCDS6b (ORCPT ); Thu, 4 Mar 2021 13:58:31 -0500 Received: from hqnvemgate25.nvidia.com ([216.228.121.64]:8025 "EHLO hqnvemgate25.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235734AbhCDS6U (ORCPT ); Thu, 4 Mar 2021 13:58:20 -0500 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Thu, 04 Mar 2021 10:57:40 -0800 Received: from HQMAIL111.nvidia.com (172.20.187.18) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 4 Mar 2021 18:57:39 +0000 Received: from vdi.nvidia.com (172.20.145.6) by mail.nvidia.com (172.20.187.18) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 4 Mar 2021 18:57:37 +0000 From: Moshe Shemesh To: "David S. Miller" , Jakub Kicinski , Andrew Lunn , Adrian Pop , "Michal Kubecek" , Don Bollinger , CC: Vladyslav Tarasiuk , Moshe Shemesh Subject: [RFC PATCH V2 net-next 5/5] ethtool: Add fallback to get_module_eeprom from netlink command Date: Thu, 4 Mar 2021 20:57:08 +0200 Message-ID: <1614884228-8542-6-git-send-email-moshe@nvidia.com> X-Mailer: git-send-email 1.8.4.3 In-Reply-To: <1614884228-8542-1-git-send-email-moshe@nvidia.com> References: <1614884228-8542-1-git-send-email-moshe@nvidia.com> MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1614884260; bh=DeOB9+NkbYAtogFD9xnt6dCwP9zWklALwJih4wOs3sA=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:MIME-Version:Content-Type; b=BKKPRim7isNSlXknLzDS2DNv7zQolpQH0aLi0LuXniFK+NsD4Qcrms4YjcxoP3fG/ IGx1JtgiirpYXlwo4mqTXiMUtfxBHbpjS8DdFx82Ibe5xoHj5BnOi70cYV+8qmRgDo VHhKaYwQWHW9tZ/kVNW2+3Y1Bm0hSJ2YjLiHCOAOxUbag9/RvDzFHwXP3aP3foqVem TL3BBqFHtAEnUniTfUdqGq4C7Q1DYIPWKoszCWZ+EZwNv/3omL/iC31qZdAXqFPlWI J5SeH6f+p9YA797RV3VcY/FTxqoRojYSDpicCuWAiiUWPd2J74OCtApF6XfIylSmUB xWdcSWiWXP0wQ== Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC From: Vladyslav Tarasiuk In case netlink get_module_eeprom_data_by_page() callback is not implemented by the driver, try to call old get_module_info() and get_module_eeprom() pair. Recalculate parameters to get_module_eeprom() offset and len using page number and their sizes. Return error if this can't be done. Signed-off-by: Vladyslav Tarasiuk --- net/ethtool/eeprom.c | 84 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 83 insertions(+), 1 deletion(-) diff --git a/net/ethtool/eeprom.c b/net/ethtool/eeprom.c index 2618a55b9a40..72c7714a9d37 100644 --- a/net/ethtool/eeprom.c +++ b/net/ethtool/eeprom.c @@ -26,6 +26,88 @@ struct eeprom_data_reply_data { #define EEPROM_DATA_REPDATA(__reply_base) \ container_of(__reply_base, struct eeprom_data_reply_data, base) +static int fallback_set_params(struct eeprom_data_req_info *request, + struct ethtool_modinfo *modinfo, + struct ethtool_eeprom *eeprom) +{ + u32 offset = request->offset; + u32 length = request->length; + + if (request->page) + offset = 128 + request->page * 128 + offset; + + if (!length) + length = modinfo->eeprom_len; + + if (offset >= modinfo->eeprom_len) + return -EINVAL; + + if (modinfo->eeprom_len < offset + length) + length = modinfo->eeprom_len - offset; + + eeprom->cmd = ETHTOOL_GMODULEEEPROM; + eeprom->len = length; + eeprom->offset = offset; + + switch (modinfo->type) { + case ETH_MODULE_SFF_8079: + if (request->page > 1) + return -EINVAL; + break; + case ETH_MODULE_SFF_8472: + if (request->page > 3) + return -EINVAL; + break; + case ETH_MODULE_SFF_8436: + case ETH_MODULE_SFF_8636: + if (request->page > 3) + return -EINVAL; + break; + } + return 0; +} + +static int eeprom_data_fallback(struct eeprom_data_req_info *request, + struct eeprom_data_reply_data *reply, + struct genl_info *info) +{ + struct net_device *dev = reply->base.dev; + struct ethtool_modinfo modinfo = {0}; + struct ethtool_eeprom eeprom = {0}; + u8 *data; + int err; + + if ((!dev->ethtool_ops->get_module_info && + !dev->ethtool_ops->get_module_eeprom) || + request->bank || request->i2c_address) { + return -EOPNOTSUPP; + } + modinfo.cmd = ETHTOOL_GMODULEINFO; + err = dev->ethtool_ops->get_module_info(dev, &modinfo); + if (err < 0) + return err; + + err = fallback_set_params(request, &modinfo, &eeprom); + if (err < 0) + return err; + + data = kmalloc(eeprom.len, GFP_KERNEL); + if (!data) + return -ENOMEM; + err = dev->ethtool_ops->get_module_eeprom(dev, &eeprom, data); + if (err < 0) + goto err_out; + + reply->data = data; + reply->length = eeprom.len; + + return 0; + +err_out: + kfree(data); + return err; +} + static int eeprom_data_prepare_data(const struct ethnl_req_info *req_base, struct ethnl_reply_data *reply_base, struct genl_info *info) @@ -37,7 +119,7 @@ static int eeprom_data_prepare_data(const struct ethnl_req_info *req_base, int err; if (!dev->ethtool_ops->get_module_eeprom_data_by_page) - return -EOPNOTSUPP; + return eeprom_data_fallback(request, reply, info); page_data.offset = request->offset; page_data.length = request->length;