From patchwork Thu Aug 24 13:37:53 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: 13364166 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5DE48100A7 for ; Thu, 24 Aug 2023 13:38:07 +0000 (UTC) Received: from pandora.armlinux.org.uk (unknown [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9190A10EF for ; Thu, 24 Aug 2023 06:38:02 -0700 (PDT) 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=+pDUnGS3fPXl62HbQXfqAtSfEmek0JbeaXPVZog/Gb8=; b=sMj3xB601rd6BEWs+KrB6LyeWd M++A88qprjsX9zbICIJ1BvFigr4KzcruflgZd2eN8DZcHueTrbTHAHE4icnpcZ00S6OhAR5B7KfRs LXJg7qcs/8By4D1sw4S6Yq7jl0yWVeoPXzcFSDegtr4UJ9baywEXhHxrhvEq2xiBRpaai1c7HpP4r sjdwycNBpUcfgkXgJHZ5hXnLMceh6pMUQX3Ej8zn4X16NkzlKiq3NDhHEMXQ2Vc5hE+S4NFNAQpRB MruKtwEUuLcQHhabrQDZRFMEKCJHm9uvJcvlAaf0xE76FveQxaH8FElvRAxfCfA7+wob9/Ene1wdZ G+SNxs9A==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:54008 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 1qZAX3-0004Bz-0q; Thu, 24 Aug 2023 14:37:53 +0100 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1qZAX3-005pTi-K1; Thu, 24 Aug 2023 14:37:53 +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 01/10] net: phylink: add phylink_limit_mac_speed() Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Message-Id: Sender: Russell King Date: Thu, 24 Aug 2023 14:37:53 +0100 X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RDNS_NONE,SPF_HELO_NONE, SPF_NONE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.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..0d7354955d62 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_capabilities &= ~phylink_caps_params[i].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.