From mboxrd@z Thu Jan 1 00:00:00 1970 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=-15.8 required=3.0 tests=BAYES_00,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 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 C929AC07E99 for ; Mon, 12 Jul 2021 10:02:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C54A610CD for ; Mon, 12 Jul 2021 10:02:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237637AbhGLKFH (ORCPT ); Mon, 12 Jul 2021 06:05:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237442AbhGLKE4 (ORCPT ); Mon, 12 Jul 2021 06:04:56 -0400 Received: from mail-qk1-x731.google.com (mail-qk1-x731.google.com [IPv6:2607:f8b0:4864:20::731]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4E2BC0613EE; Mon, 12 Jul 2021 03:02:00 -0700 (PDT) Received: by mail-qk1-x731.google.com with SMTP id 201so3276041qkj.13; Mon, 12 Jul 2021 03:02:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jms.id.au; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=CcO+S5Zayg1q6m7Eey60LqzwAIbIXqOmOIasgtmtdWM=; b=MCP6NgccAbXkgNOyU8PjjtW+CaZ7oJES3A1BuZHkfY9A8y1fMr4He+CdYMYcuRix/r 9IvHgi6aIBLvq2cAVRkA22LomSKzrxCrnUir37IDi+NpvNliIBXf5OvLu5fJgrrYuGVS 4ASPEkH6ZauE2823e0+AF8kOmijxbZXmOU97o= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=CcO+S5Zayg1q6m7Eey60LqzwAIbIXqOmOIasgtmtdWM=; b=AqscvtWKKln9HMA11NjSPckYfOLtZ80wnccWV2FLeskxv6i/HtP3G7GvBa/vSOVdKv tyUx9dSyz6Vi/sIVGnmCf67AHqBeaiMPVygSRtRAmG+3+mgEAUlx6y7NGXfO1dAqLCv0 ClwHBTSPjX9Fur5QzJYtZqLWjQ6mgNix+kvsYlBqSaTZ0/wflK5HqzV3dg3AGU4kCR7R j2bXBLxDeHCKQID2K4aWRKZLb2JH//MP0tCpITc4gFBruKjff1A0ZBp7sL1Hg15eQCs8 TD5xNly1ymOUsTtNo50cwQeyKKKdNlRsmOIKeofe9RcZTrA6ProKU4Ou5IX/9jmzs+th NiqQ== X-Gm-Message-State: AOAM5312yRtFRhppb2c0XUU1Hr+LPEoMInsYxxRoOTei9wBvLzDpaTw5 77IMGH4Ib0XUqZiF5YpJJPvtKNS0lOXSjrC0XHg= X-Google-Smtp-Source: ABdhPJyVI/uQ7Ws4s58SXJjB9pKH3dBVfAjweUVQV4zxTjzi0eljD2r56wjEaDSjQvDReuSntb16NqQ+iI4cgMDMquA= X-Received: by 2002:a37:9d41:: with SMTP id g62mr21436759qke.55.1626084119810; Mon, 12 Jul 2021 03:01:59 -0700 (PDT) MIME-Version: 1.0 References: <20210708122754.555846-1-i.mikhaylov@yadro.com> <20210708122754.555846-3-i.mikhaylov@yadro.com> In-Reply-To: <20210708122754.555846-3-i.mikhaylov@yadro.com> From: Joel Stanley Date: Mon, 12 Jul 2021 10:01:45 +0000 Message-ID: Subject: Re: [PATCH v2 2/3] net/ncsi: add NCSI Intel OEM command to keep PHY up To: Ivan Mikhaylov , Eddie James Cc: "David S . Miller" , Jakub Kicinski , Samuel Mendoza-Jonas , Benjamin Herrenschmidt , Networking , Linux Kernel Mailing List , OpenBMC Maillist Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Thu, 8 Jul 2021 at 12:27, Ivan Mikhaylov wrote: > > This allows to keep PHY link up and prevents any channel resets during > the host load. > > It is KEEP_PHY_LINK_UP option(Veto bit) in i210 datasheet which > block PHY reset and power state changes. How about using runtime configuration over using kconfig for this, so the same kernel config can be used on different machines. Something device tree based? Another option is to use the netlink handler to send the OEM command from userspace. Eddie has worked on this for an IBM machine, and I've asked him to post those changes. I would prefer the kernel option though. > > Signed-off-by: Ivan Mikhaylov > --- > net/ncsi/Kconfig | 6 ++++++ > net/ncsi/internal.h | 5 +++++ > net/ncsi/ncsi-manage.c | 45 ++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 56 insertions(+) > > diff --git a/net/ncsi/Kconfig b/net/ncsi/Kconfig > index 93309081f5a4..ea1dd32b6b1f 100644 > --- a/net/ncsi/Kconfig > +++ b/net/ncsi/Kconfig > @@ -17,3 +17,9 @@ config NCSI_OEM_CMD_GET_MAC > help > This allows to get MAC address from NCSI firmware and set them back to > controller. > +config NCSI_OEM_CMD_KEEP_PHY > + bool "Keep PHY Link up" > + depends on NET_NCSI > + help > + This allows to keep PHY link up and prevents any channel resets during > + the host load. > diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h > index cbbb0de4750a..0b6cfd3b31e0 100644 > --- a/net/ncsi/internal.h > +++ b/net/ncsi/internal.h > @@ -78,6 +78,9 @@ enum { > /* OEM Vendor Manufacture ID */ > #define NCSI_OEM_MFR_MLX_ID 0x8119 > #define NCSI_OEM_MFR_BCM_ID 0x113d > +#define NCSI_OEM_MFR_INTEL_ID 0x157 > +/* Intel specific OEM command */ > +#define NCSI_OEM_INTEL_CMD_KEEP_PHY 0x20 /* CMD ID for Keep PHY up */ > /* Broadcom specific OEM Command */ > #define NCSI_OEM_BCM_CMD_GMA 0x01 /* CMD ID for Get MAC */ > /* Mellanox specific OEM Command */ > @@ -86,6 +89,7 @@ enum { > #define NCSI_OEM_MLX_CMD_SMAF 0x01 /* CMD ID for Set MC Affinity */ > #define NCSI_OEM_MLX_CMD_SMAF_PARAM 0x07 /* Parameter for SMAF */ > /* OEM Command payload lengths*/ > +#define NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN 7 > #define NCSI_OEM_BCM_CMD_GMA_LEN 12 > #define NCSI_OEM_MLX_CMD_GMA_LEN 8 > #define NCSI_OEM_MLX_CMD_SMAF_LEN 60 > @@ -271,6 +275,7 @@ enum { > ncsi_dev_state_probe_mlx_gma, > ncsi_dev_state_probe_mlx_smaf, > ncsi_dev_state_probe_cis, > + ncsi_dev_state_probe_keep_phy, > ncsi_dev_state_probe_gvi, > ncsi_dev_state_probe_gc, > ncsi_dev_state_probe_gls, > diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c > index 42b54a3da2e6..89c7742cd72e 100644 > --- a/net/ncsi/ncsi-manage.c > +++ b/net/ncsi/ncsi-manage.c > @@ -689,6 +689,35 @@ static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc, > return 0; > } > > +#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY) > + > +static int ncsi_oem_keep_phy_intel(struct ncsi_cmd_arg *nca) > +{ > + unsigned char data[NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN]; > + int ret = 0; > + > + nca->payload = NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN; > + > + memset(data, 0, NCSI_OEM_INTEL_CMD_KEEP_PHY_LEN); > + *(unsigned int *)data = ntohl((__force __be32)NCSI_OEM_MFR_INTEL_ID); > + > + data[4] = NCSI_OEM_INTEL_CMD_KEEP_PHY; > + > + /* PHY Link up attribute */ > + data[6] = 0x1; > + > + nca->data = data; > + > + ret = ncsi_xmit_cmd(nca); > + if (ret) > + netdev_err(nca->ndp->ndev.dev, > + "NCSI: Failed to transmit cmd 0x%x during configure\n", > + nca->type); > + return ret; > +} > + > +#endif > + > #if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC) > > /* NCSI OEM Command APIs */ > @@ -1391,8 +1420,24 @@ static void ncsi_probe_channel(struct ncsi_dev_priv *ndp) > goto error; > } > > + nd->state = ncsi_dev_state_probe_gvi; > + if (IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY)) > + nd->state = ncsi_dev_state_probe_keep_phy; > + break; > +#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_KEEP_PHY) > + case ncsi_dev_state_probe_keep_phy: > + ndp->pending_req_num = 1; > + > + nca.type = NCSI_PKT_CMD_OEM; > + nca.package = ndp->active_package->id; > + nca.channel = 0; > + ret = ncsi_oem_keep_phy_intel(&nca); > + if (ret) > + goto error; > + > nd->state = ncsi_dev_state_probe_gvi; > break; > +#endif /* CONFIG_NCSI_OEM_CMD_KEEP_PHY */ > case ncsi_dev_state_probe_gvi: > case ncsi_dev_state_probe_gc: > case ncsi_dev_state_probe_gls: > -- > 2.31.1 >