Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753871AbdCMQgx (ORCPT ); Mon, 13 Mar 2017 12:36:53 -0400 Received: from mail-pf0-f194.google.com ([209.85.192.194]:36275 "EHLO mail-pf0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751703AbdCMQfn (ORCPT ); Mon, 13 Mar 2017 12:35:43 -0400 Subject: Re: [PATCH net-next 2/4] net-next: dsa: add Mediatek tag RX/TX handler To: sean.wang@mediatek.com, andrew@lunn.ch, vivien.didelot@savoirfairelinux.com, matthias.bgg@gmail.com, robh+dt@kernel.org, mark.rutland@arm.com References: <1489421488-300-1-git-send-email-sean.wang@mediatek.com> <1489421488-300-3-git-send-email-sean.wang@mediatek.com> Cc: devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, davem@davemloft.net, Landen.Chao@mediatek.com, keyhaede@gmail.com, objelf@gmail.com From: Florian Fainelli Message-ID: Date: Mon, 13 Mar 2017 09:35:31 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0 MIME-Version: 1.0 In-Reply-To: <1489421488-300-3-git-send-email-sean.wang@mediatek.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4270 Lines: 133 On 03/13/2017 09:11 AM, sean.wang@mediatek.com wrote: > From: Sean Wang > > Add the support for the 4-bytes tag for DSA port distinguishing inserted > allowing receiving and transmitting the packet via the particular port. > The tag is being added after the source MAC address in the ethernet > header. > > Signed-off-by: Sean Wang > Signed-off-by: Landen Chao > --- > include/net/dsa.h | 1 + > net/dsa/Kconfig | 2 + > net/dsa/Makefile | 1 + > net/dsa/dsa.c | 3 ++ > net/dsa/dsa_priv.h | 3 ++ > net/dsa/tag_mtk.c | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++++ > 6 files changed, 131 insertions(+) > create mode 100644 net/dsa/tag_mtk.c > > diff --git a/include/net/dsa.h b/include/net/dsa.h > index b122196..954cff2 100644 > --- a/include/net/dsa.h > +++ b/include/net/dsa.h > @@ -27,6 +27,7 @@ enum dsa_tag_protocol { > DSA_TAG_PROTO_EDSA, > DSA_TAG_PROTO_BRCM, > DSA_TAG_PROTO_QCA, > + DSA_TAG_PROTO_MTK, > DSA_TAG_LAST, /* MUST BE LAST */ > }; > > diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig > index 96e47c5..43b67e8 100644 > --- a/net/dsa/Kconfig > +++ b/net/dsa/Kconfig > @@ -41,4 +41,6 @@ config NET_DSA_TAG_TRAILER > config NET_DSA_TAG_QCA > bool > > +config NET_DSA_TAG_MTK > + bool > endif > diff --git a/net/dsa/Makefile b/net/dsa/Makefile > index a3380ed..97c9891 100644 > --- a/net/dsa/Makefile > +++ b/net/dsa/Makefile > @@ -8,3 +8,4 @@ dsa_core-$(CONFIG_NET_DSA_TAG_DSA) += tag_dsa.o > dsa_core-$(CONFIG_NET_DSA_TAG_EDSA) += tag_edsa.o > dsa_core-$(CONFIG_NET_DSA_TAG_TRAILER) += tag_trailer.o > dsa_core-$(CONFIG_NET_DSA_TAG_QCA) += tag_qca.o > +dsa_core-$(CONFIG_NET_DSA_TAG_MTK) += tag_mtk.o > diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c > index 7899919..3586b1e 100644 > --- a/net/dsa/dsa.c > +++ b/net/dsa/dsa.c > @@ -57,6 +57,9 @@ static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb, > #ifdef CONFIG_NET_DSA_TAG_QCA > [DSA_TAG_PROTO_QCA] = &qca_netdev_ops, > #endif > +#ifdef CONFIG_NET_DSA_TAG_MTK > + [DSA_TAG_PROTO_MTK] = &mtk_dsa_netdev_ops, > +#endif > [DSA_TAG_PROTO_NONE] = &none_ops, > }; > > diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h > index 6cfd738..de61e8f 100644 > --- a/net/dsa/dsa_priv.h > +++ b/net/dsa/dsa_priv.h > @@ -84,4 +84,7 @@ int dsa_slave_netdevice_event(struct notifier_block *unused, > /* tag_qca.c */ > extern const struct dsa_device_ops qca_netdev_ops; > > +/* tag_mtk.c */ > +extern const struct dsa_device_ops mtk_dsa_netdev_ops; > + > #endif > diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c > new file mode 100644 > index 0000000..a2dc014 > --- /dev/null > +++ b/net/dsa/tag_mtk.c > @@ -0,0 +1,121 @@ > +/* > + * Mediatek DSA Tag support > + * Copyright (C) 2017 Landen Chao > + * Sean Wang > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 and > + * only version 2 as published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include > +#include "dsa_priv.h" > + > +#define MTK_HDR_LEN 4 > +#define MTK_HDR_RECV_SOURCE_PORT_MASK GENMASK(2, 0) > +#define MTK_HDR_XMIT_DP_BIT_MASK GENMASK(5, 0) > + > +static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb, > + struct net_device *dev) > +{ > + struct dsa_slave_priv *p = netdev_priv(dev); > + u8 *mtk_tag; > + > + if (skb_cow_head(skb, MTK_HDR_LEN) < 0) > + goto out_free; > + > + skb_push(skb, MTK_HDR_LEN); > + > + memmove(skb->data, skb->data + MTK_HDR_LEN, 2 * ETH_ALEN); > + > + /* Build the tag after the MAC Source Address */ > + mtk_tag = skb->data + 2 * ETH_ALEN; > + > + /* Set the ingress opcode, traffic class, tag enforcment is > + * deprecated > + */ Sounds like this comment came from tag_brcm.c does it really apply here as well? Other than that: Reviewed-by: Florian Fainelli -- Florian