From patchwork Mon Sep 4 12:02:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Majewski X-Patchwork-Id: 13373778 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 15915AD48 for ; Mon, 4 Sep 2023 12:02:35 +0000 (UTC) Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EBCBB1B7; Mon, 4 Sep 2023 05:02:33 -0700 (PDT) Received: from localhost.localdomain (85-222-111-42.dynamic.chello.pl [85.222.111.42]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: lukma@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 2046F8684C; Mon, 4 Sep 2023 14:02:32 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1693828952; bh=B9gqDbm3tIBLoslh6Yhvjy+urXpXmexvewmKiIKOz8c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pyD8bNu6K4zsj1fcSq4W0IjMiV3eOiG+RdVRI6IVRR32S6WjHjeUOyiaUPbjsG4Nq sqehWszQHmJJ8UGfY+c4InI7iITu/GwhfQh+iyarQ2JS9pPELZp1K/e/rHMo6AAyqW ejbPw6RfqBEili+GgnFseAz++4/vqzZ95+yHalxm2wPhNZuTkpqns2cNXm/sJsE98y bz4+o92rCRs4uMO86tYJY0gxvyrJEz2gpBn+++8Lp+QzrBlZjZxdYbonIjDUsB8DoZ Gh9Mo2GZGGB/ndwyg3m/7+e23LesjntEndUCvV65B2y8CcsWI55mdIrQ9lS1dhqdMO TF//IAwP9r+qg== From: Lukasz Majewski To: Eric Dumazet , Andrew Lunn , davem@davemloft.net, Paolo Abeni , Woojung Huh , Vladimir Oltean Cc: Tristram.Ha@microchip.com, Florian Fainelli , Jakub Kicinski , UNGLinuxDriver@microchip.com, George McCollister , Oleksij Rempel , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Lukasz Majewski Subject: [PATCH v3 RFC 2/4] net: dsa: Extend ksz9477 TAG setup to support HSR frames duplication Date: Mon, 4 Sep 2023 14:02:07 +0200 Message-Id: <20230904120209.741207-3-lukma@denx.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230904120209.741207-1-lukma@denx.de> References: <20230904120209.741207-1-lukma@denx.de> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 X-Patchwork-State: RFC The KSZ9477 has support for HSR (High-Availability Seamless Redundancy). One of its offloading (i.e. performed in the switch IC hardware) features is to duplicate received frame to both HSR aware switch ports. To achieve this goal - the tail TAG needs to be modified. To be more specific, both ports must be marked as destination (egress) ones. Moreover, according to AN3474 application note, the lookup bit (10) should not be set in the tail tag. Last but not least - the NETIF_F_HW_HSR_DUP flag indicates that the device supports HSR and assures (in HSR core code) that frame is sent only once from HOST to switch with tail tag indicating both ports. Information about bits to be set in tag is provided via KSZ generic ksz_hsr_get_ports() function. Signed-off-by: Lukasz Majewski --- Changes for v2: - Use ksz_hsr_get_ports() to obtain the bits values corresponding to HSR aware ports Changes for v3: - None --- drivers/net/dsa/microchip/ksz_common.c | 12 ++++++++++++ include/linux/dsa/ksz_common.h | 1 + net/dsa/tag_ksz.c | 5 +++++ 3 files changed, 18 insertions(+) diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index d9d843efd111..579fde54d1e1 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -3421,6 +3421,18 @@ static int ksz_setup_tc(struct dsa_switch *ds, int port, } } +u16 ksz_hsr_get_ports(struct dsa_switch *ds) +{ + struct ksz_device *dev = ds->priv; + + switch (dev->chip_id) { + case KSZ9477_CHIP_ID: + return dev->hsr_ports; + } + + return 0; +} + static const struct dsa_switch_ops ksz_switch_ops = { .get_tag_protocol = ksz_get_tag_protocol, .connect_tag_protocol = ksz_connect_tag_protocol, diff --git a/include/linux/dsa/ksz_common.h b/include/linux/dsa/ksz_common.h index 576a99ca698d..fa3d9b0f3a72 100644 --- a/include/linux/dsa/ksz_common.h +++ b/include/linux/dsa/ksz_common.h @@ -50,4 +50,5 @@ ksz_tagger_data(struct dsa_switch *ds) return ds->tagger_data; } +u16 ksz_hsr_get_ports(struct dsa_switch *ds); #endif /* _NET_DSA_KSZ_COMMON_H_ */ diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c index ea100bd25939..903db95c37ee 100644 --- a/net/dsa/tag_ksz.c +++ b/net/dsa/tag_ksz.c @@ -293,6 +293,11 @@ static struct sk_buff *ksz9477_xmit(struct sk_buff *skb, if (is_link_local_ether_addr(hdr->h_dest)) val |= KSZ9477_TAIL_TAG_OVERRIDE; + if (dev->features & NETIF_F_HW_HSR_DUP) { + val &= ~KSZ9477_TAIL_TAG_LOOKUP; + val |= ksz_hsr_get_ports(dp->ds); + } + *tag = cpu_to_be16(val); return ksz_defer_xmit(dp, skb);