From patchwork Tue Aug 22 18:50:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 13361336 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9D74BEE49AB for ; Tue, 22 Aug 2023 18:50:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Date:Message-Id:MIME-Version:Subject:Cc :To:From:References:In-Reply-To:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=0lzgJCmoR7ON1vf1VaXgKO2OM9mBxKCKeXx3uHIsdGo=; b=ufnxzG9cWRhs3O /B+wtxBBWiUEzIpZHuiyA5n6VdKG3PqnQstRdxJlDpwe+DK5VIZ41BwsyobgjsxZvTya+fm+4SOqW g+WouTyhtuESuVLmwmtyaP7iVAjhfN4xjSYCLTTwNIHinchAeU9T7WNbdEHa7qe9qlpMMN/mEnuRs IjRGfL8iOECPYpKcqEXwS+6INUoawJb89ustpxhEyPckkTgokoD5Og0Y47D75mzTPXgyiZaAY5Mq0 MrUF8fM1cEZukQPmc3VAb5hrD81cZaUidd/Mk6iIcTU62gwQ2w3D70mA/iPsCEh0HIemOs6KV+l0I 2TMNHDfuJrHX/GZLMmlg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qYWSD-00GesG-2z; Tue, 22 Aug 2023 18:50:13 +0000 Received: from [2001:4d48:ad52:32c8:5054:ff:fe00:142] (helo=pandora.armlinux.org.uk) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qYWSA-00Ger5-1v for linux-arm-kernel@lists.infradead.org; Tue, 22 Aug 2023 18:50:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=wXywfinDrh/D4JMPhXkaG0+dtk6nuKfW62AiGbtgz04=; b=cijwVm5Im2kF01pDOJoh7chIpj DIKhoahSWj5nX6Vkf2ekJmjvxJJWMmn1m0WvruccuYULElHi87AHifUDH+arLjFIr02Hs4lpSHQ9g T4WEpEipBFbqxiIGH/GJBtN9QkDrYj/hWUfO5KR6T/LgWzqYcShP+eQZQocw1xBt0DdUAF3ekoTfM TmDD7/4VXbeIEyl3a1n90G19dklgdWgTBXELUGxs072pk+JyZpDUuvrx8tNB2tZ3yHEXPgBLuciwp CiSjwEyHFgliq9/e0qp2RuyqaMVtENkDlAqQkxpj4EmsGlWcE68XS7t13+w42Evea890ezWo6FEug 5Y3fi8Aw==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:33416 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1qYWS3-0001r8-1I; Tue, 22 Aug 2023 19:50:03 +0100 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1qYWS3-005fXU-Ij; Tue, 22 Aug 2023 19:50:03 +0100 In-Reply-To: References: From: "Russell King (Oracle)" To: Alexandre Torgue , Jose Abreu Cc: Andrew Lunn , "David S. Miller" , Eric Dumazet , Feiyang Chen , Heiner Kallweit , Jakub Kicinski , linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, Maxime Coquelin , netdev@vger.kernel.org, Paolo Abeni Subject: [PATCH net-next 1/9] net: phylink: add phylink_limit_mac_speed() MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Tue, 22 Aug 2023 19:50:03 +0100 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230822_115010_638701_472795A1 X-CRM114-Status: GOOD ( 11.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a function which can be used to limit the phylink MAC capabilities to an upper speed limit. Signed-off-by: Russell King (Oracle) --- drivers/net/phy/phylink.c | 18 ++++++++++++++++++ include/linux/phylink.h | 2 ++ 2 files changed, 20 insertions(+) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 160bce608c34..b51cf92392d2 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -426,6 +426,24 @@ static struct { { MAC_10HD, SPEED_10, DUPLEX_HALF }, }; +/** + * phylink_limit_mac_speed - limit the phylink_config to a maximum speed + * @config: pointer to a &struct phylink_config + * @max_speed: maximum speed + * + * Mask off MAC capabilities for speeds higher than the @max_speed parameter. + * Any further motifications of config.mac_capabilities will override this. + */ +void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(phylink_caps_params) && + phylink_caps_params[i].speed > max_speed; i++) + config->mac_speed &= ~phylink_caps_params.mask; +} +EXPORT_SYMBOL_GPL(phylink_limit_mac_speed); + /** * phylink_cap_from_speed_duplex - Get mac capability from speed/duplex * @speed: the speed to search for diff --git a/include/linux/phylink.h b/include/linux/phylink.h index 789c516c6b4a..7d07f8736431 100644 --- a/include/linux/phylink.h +++ b/include/linux/phylink.h @@ -223,6 +223,8 @@ struct phylink_config { unsigned long mac_capabilities; }; +void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed); + /** * struct phylink_mac_ops - MAC operations structure. * @validate: Validate and update the link configuration.