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[193.12.47.89]) by smtp.gmail.com with ESMTPSA id f7sm25897402wrp.48.2021.04.20.11.53.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Apr 2021 11:53:21 -0700 (PDT) From: Tobias Waldekranz To: davem@davemloft.net, kuba@kernel.org Cc: andrew@lunn.ch, vivien.didelot@gmail.com, f.fainelli@gmail.com, olteanv@gmail.com, netdev@vger.kernel.org, robh+dt@kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 net-next 1/5] net: dsa: mv88e6xxx: Mark chips with undocumented EDSA tag support Date: Tue, 20 Apr 2021 20:53:07 +0200 Message-Id: <20210420185311.899183-2-tobias@waldekranz.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210420185311.899183-1-tobias@waldekranz.com> References: <20210420185311.899183-1-tobias@waldekranz.com> MIME-Version: 1.0 Organization: Westermo Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org All devices are capable of using regular DSA tags. Support for Ethertyped DSA tags sort into three categories: 1. No support. Older chips fall into this category. 2. Full support. Datasheet explicitly supports configuring the CPU port to receive FORWARDs with a DSA tag. 3. Undocumented support. Datasheet lists the configuration from category 2 as "reserved for future use", but does empirically behave like a category 2 device. So, instead of listing the one true protocol that should be used by a particular chip, specify the level of support for EDSA (support for regular DSA is implicit on all chips). As before, we use EDSA for all chips that fully supports it. In upcoming changes, we will use this information to support dynamically changing the tag protocol. Signed-off-by: Tobias Waldekranz Reviewed-by: Vladimir Oltean Reviewed-by: Florian Fainelli --- drivers/net/dsa/mv88e6xxx/chip.c | 60 ++++++++++++++------------------ drivers/net/dsa/mv88e6xxx/chip.h | 21 ++++++++++- 2 files changed, 46 insertions(+), 35 deletions(-) diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index 860dca41cf4b..3e8b914aaf37 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -2531,10 +2531,10 @@ static int mv88e6xxx_setup_port_mode(struct mv88e6xxx_chip *chip, int port) return mv88e6xxx_set_port_mode_normal(chip, port); /* Setup CPU port mode depending on its supported tag format */ - if (chip->info->tag_protocol == DSA_TAG_PROTO_DSA) + if (chip->tag_protocol == DSA_TAG_PROTO_DSA) return mv88e6xxx_set_port_mode_dsa(chip, port); - if (chip->info->tag_protocol == DSA_TAG_PROTO_EDSA) + if (chip->tag_protocol == DSA_TAG_PROTO_EDSA) return mv88e6xxx_set_port_mode_edsa(chip, port); return -EINVAL; @@ -4785,7 +4785,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ops = &mv88e6085_ops, }, @@ -4806,7 +4805,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .g1_irqs = 8, .atu_move_port_mask = 0xf, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ops = &mv88e6095_ops, }, @@ -4829,7 +4827,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6097_ops, }, @@ -4852,7 +4850,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6123_ops, }, @@ -4873,7 +4871,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .g1_irqs = 9, .atu_move_port_mask = 0xf, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ops = &mv88e6131_ops, }, @@ -4897,7 +4894,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .g2_irqs = 10, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6141_ops, }, @@ -4920,7 +4917,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ptp_support = true, .ops = &mv88e6161_ops, }, @@ -4944,7 +4941,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ptp_support = true, .ops = &mv88e6165_ops, }, @@ -4968,7 +4964,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6171_ops, }, @@ -4992,7 +4988,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6172_ops, }, @@ -5015,7 +5011,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6175_ops, }, @@ -5039,7 +5035,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6176_ops, }, @@ -5060,7 +5056,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .g1_irqs = 8, .atu_move_port_mask = 0xf, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6185_ops, }, @@ -5078,7 +5074,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .phy_base_addr = 0x0, .global1_addr = 0x1b, .global2_addr = 0x1c, - .tag_protocol = DSA_TAG_PROTO_DSA, .age_time_coeff = 3750, .g1_irqs = 9, .g2_irqs = 14, @@ -5108,7 +5103,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0x1f, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ops = &mv88e6190x_ops, }, @@ -5131,7 +5125,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0x1f, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ptp_support = true, .ops = &mv88e6191_ops, }, @@ -5154,7 +5147,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0x1f, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ptp_support = true, .ops = &mv88e6393x_ops, }, @@ -5177,7 +5169,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0x1f, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ptp_support = true, .ops = &mv88e6393x_ops, }, @@ -5204,7 +5195,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .g2_irqs = 10, .atu_move_port_mask = 0xf, .dual_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ptp_support = true, .ops = &mv88e6250_ops, }, @@ -5229,7 +5219,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ptp_support = true, .ops = &mv88e6240_ops, }, @@ -5251,7 +5241,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .g2_irqs = 10, .atu_move_port_mask = 0xf, .dual_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ptp_support = true, .ops = &mv88e6250_ops, }, @@ -5275,7 +5264,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0x1f, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ptp_support = true, .ops = &mv88e6290_ops, }, @@ -5300,7 +5288,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ptp_support = true, .ops = &mv88e6320_ops, }, @@ -5324,7 +5312,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .g2_irqs = 10, .atu_move_port_mask = 0xf, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ptp_support = true, .ops = &mv88e6321_ops, }, @@ -5349,7 +5337,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .g2_irqs = 10, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ptp_support = true, .ops = &mv88e6341_ops, }, @@ -5373,7 +5361,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6350_ops, }, @@ -5396,7 +5384,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ops = &mv88e6351_ops, }, @@ -5420,7 +5408,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0xf, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_EDSA, + .edsa_support = MV88E6XXX_EDSA_SUPPORTED, .ptp_support = true, .ops = &mv88e6352_ops, }, @@ -5444,7 +5432,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0x1f, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, + .edsa_support = MV88E6XXX_EDSA_UNDOCUMENTED, .ptp_support = true, .ops = &mv88e6390_ops, }, @@ -5468,7 +5456,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0x1f, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, + .edsa_support = MV88E6XXX_EDSA_UNDOCUMENTED, .ptp_support = true, .ops = &mv88e6390x_ops, }, @@ -5491,7 +5479,6 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { .atu_move_port_mask = 0x1f, .pvt = true, .multi_chip = true, - .tag_protocol = DSA_TAG_PROTO_DSA, .ptp_support = true, .ops = &mv88e6393x_ops, }, @@ -5560,7 +5547,7 @@ static enum dsa_tag_protocol mv88e6xxx_get_tag_protocol(struct dsa_switch *ds, { struct mv88e6xxx_chip *chip = ds->priv; - return chip->info->tag_protocol; + return chip->tag_protocol; } static int mv88e6xxx_port_mdb_add(struct dsa_switch *ds, int port, @@ -6205,6 +6192,11 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev) if (err) goto out; + if (chip->info->edsa_support == MV88E6XXX_EDSA_SUPPORTED) + chip->tag_protocol = DSA_TAG_PROTO_EDSA; + else + chip->tag_protocol = DSA_TAG_PROTO_DSA; + mv88e6xxx_phy_init(chip); if (chip->info->ops->get_eeprom) { diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h index bce6e0dc8535..4f116f73a74b 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.h +++ b/drivers/net/dsa/mv88e6xxx/chip.h @@ -96,6 +96,22 @@ enum mv88e6xxx_family { MV88E6XXX_FAMILY_6393, /* 6191X 6193X 6393X */ }; +/** + * enum mv88e6xxx_edsa_support - Ethertype DSA tag support level + * @MV88E6XXX_EDSA_UNSUPPORTED: Device has no support for EDSA tags + * @MV88E6XXX_EDSA_UNDOCUMENTED: Documentation indicates that + * egressing FORWARD frames with an EDSA + * tag is reserved for future use, but + * empirical data shows that this mode + * is supported. + * @MV88E6XXX_EDSA_SUPPORTED: EDSA tags are fully supported. + */ +enum mv88e6xxx_edsa_support { + MV88E6XXX_EDSA_UNSUPPORTED = 0, + MV88E6XXX_EDSA_UNDOCUMENTED, + MV88E6XXX_EDSA_SUPPORTED, +}; + struct mv88e6xxx_ops; struct mv88e6xxx_info { @@ -133,7 +149,7 @@ struct mv88e6xxx_info { */ bool dual_chip; - enum dsa_tag_protocol tag_protocol; + enum mv88e6xxx_edsa_support edsa_support; /* Mask for FromPort and ToPort value of PortVec used in ATU Move * operation. 0 means that the ATU Move operation is not supported. @@ -261,6 +277,9 @@ struct mv88e6xxx_region_priv { struct mv88e6xxx_chip { const struct mv88e6xxx_info *info; + /* Currently configured tagging protocol */ + enum dsa_tag_protocol tag_protocol; + /* The dsa_switch this private structure is related to */ struct dsa_switch *ds; From patchwork Tue Apr 20 18:53:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tobias Waldekranz X-Patchwork-Id: 425023 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT 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 D6C24C43461 for ; Tue, 20 Apr 2021 18:53:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A4193613E0 for ; Tue, 20 Apr 2021 18:53:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233697AbhDTSyB (ORCPT ); Tue, 20 Apr 2021 14:54:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233689AbhDTSx4 (ORCPT ); Tue, 20 Apr 2021 14:53:56 -0400 Received: from mail-wm1-x32e.google.com (mail-wm1-x32e.google.com [IPv6:2a00:1450:4864:20::32e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E43F2C06138B for ; Tue, 20 Apr 2021 11:53:24 -0700 (PDT) Received: by mail-wm1-x32e.google.com with SMTP id k4-20020a7bc4040000b02901331d89fb83so8474463wmi.5 for ; Tue, 20 Apr 2021 11:53:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=waldekranz-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:organization:content-transfer-encoding; bh=shL6zOQzv52YEKOsxH5/pj2HoCJcjW02k0sCp3S/LFo=; b=pKejEQtT3ejZSvbuGJ20rJnvpnjqLCCRIYJaHm6GgaQH8P4uSFQ3u0+LuXXiXa4jNw kQbXKqYiMuo3dhrcmz37NXt+hdixST97A4/SA4PgqE6ZML7WDvSPToCLMEy1VSjffuGf jcSldwcCXEAVpQ4kHKGxfpSLF4R2QPcL4kkFzUlQ0kJ2ACh2dYhGV5qkIW0x5zevOs9r OFoev1ofQ6N5T9wPEkaaM8GWEeL86AautK4aK+RoRK1nJhG3wiYMc7VHmU6b+nsHov6A QrW9slS28N6TQ1f0Q/KMqWdnMoc7TjkRcmWi6CAtRkAuN0sfOh5rGSOnG06dUqso1UdI rl2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:organization:content-transfer-encoding; bh=shL6zOQzv52YEKOsxH5/pj2HoCJcjW02k0sCp3S/LFo=; b=ZTOdl5KmzNAd+1r4bnbH4XrD4teb3Rna/jC+dAim/jNiBnW26tuEhuWqlcqn5zj8ub ychoH6QoGQOcrr9XxsKvLfgyHTkZvyGbTX4+oAGFaOEWxz3w4C/itb00YCgrmSRYQFTy lTTc8n5V3ctEm0T4/ufnfStu0+ShRXFwxHsYWCeAxoTkVrwssqfq56e0M+M+ZP/E0MPT 3iof9PHPXoCUDRJNARj+qfxIP6TlxJ5N1tptxOeersjedGN9RwDrk0hOz6Dux9dZSRAB p5vMq6MIqC7/CbXKavF/cU5kXHKgdQgRhOrBL3I+gEf2zhIlbmkKocZ5yfl8cpcJPSuo 4+/Q== X-Gm-Message-State: AOAM530RtBW6MfhtKxqOkt9TpVWqz7FYPp8v2HYrcL1itsX31hm4TLjb VD9fGnW8H14h7406wObWcPG1sA== X-Google-Smtp-Source: ABdhPJwhX0piPJJ0TmJEpEglEWchVkOSf9tp+S8bnnyq0dmmnU67vMmOsZzOpwsoMq+Pe2ChfO8HTg== X-Received: by 2002:a1c:f60a:: with SMTP id w10mr5859973wmc.5.1618944803704; Tue, 20 Apr 2021 11:53:23 -0700 (PDT) Received: from veiron.westermo.com (static-193-12-47-89.cust.tele2.se. [193.12.47.89]) by smtp.gmail.com with ESMTPSA id f7sm25897402wrp.48.2021.04.20.11.53.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Apr 2021 11:53:23 -0700 (PDT) From: Tobias Waldekranz To: davem@davemloft.net, kuba@kernel.org Cc: andrew@lunn.ch, vivien.didelot@gmail.com, f.fainelli@gmail.com, olteanv@gmail.com, netdev@vger.kernel.org, robh+dt@kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 net-next 3/5] net: dsa: Only notify CPU ports of changes to the tag protocol Date: Tue, 20 Apr 2021 20:53:09 +0200 Message-Id: <20210420185311.899183-4-tobias@waldekranz.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210420185311.899183-1-tobias@waldekranz.com> References: <20210420185311.899183-1-tobias@waldekranz.com> MIME-Version: 1.0 Organization: Westermo Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Previously DSA ports were also included, on the assumption that the protocol used by the CPU port had to the matched throughout the entire tree. As there is not yet any consumer in need of this, drop the call. Signed-off-by: Tobias Waldekranz Reviewed-by: Vladimir Oltean Reviewed-by: Florian Fainelli --- net/dsa/switch.c | 25 +++++++------------------ 1 file changed, 7 insertions(+), 18 deletions(-) diff --git a/net/dsa/switch.c b/net/dsa/switch.c index 32963276452f..9bf8e20ecdf3 100644 --- a/net/dsa/switch.c +++ b/net/dsa/switch.c @@ -323,15 +323,6 @@ static int dsa_switch_vlan_del(struct dsa_switch *ds, return 0; } -static bool dsa_switch_tag_proto_match(struct dsa_switch *ds, int port, - struct dsa_notifier_tag_proto_info *info) -{ - if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) - return true; - - return false; -} - static int dsa_switch_change_tag_proto(struct dsa_switch *ds, struct dsa_notifier_tag_proto_info *info) { @@ -344,16 +335,14 @@ static int dsa_switch_change_tag_proto(struct dsa_switch *ds, ASSERT_RTNL(); for (port = 0; port < ds->num_ports; port++) { - if (dsa_switch_tag_proto_match(ds, port, info)) { - err = ds->ops->change_tag_protocol(ds, port, - tag_ops->proto); - if (err) - return err; + if (!dsa_is_cpu_port(ds, port)) + continue; - if (dsa_is_cpu_port(ds, port)) - dsa_port_set_tag_protocol(dsa_to_port(ds, port), - tag_ops); - } + err = ds->ops->change_tag_protocol(ds, port, tag_ops->proto); + if (err) + return err; + + dsa_port_set_tag_protocol(dsa_to_port(ds, port), tag_ops); } /* Now that changing the tag protocol can no longer fail, let's update From patchwork Tue Apr 20 18:53:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tobias Waldekranz X-Patchwork-Id: 425022 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 90955C433B4 for ; Tue, 20 Apr 2021 18:53:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 57D91613DF for ; Tue, 20 Apr 2021 18:53:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233734AbhDTSyG (ORCPT ); Tue, 20 Apr 2021 14:54:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233693AbhDTSx5 (ORCPT ); Tue, 20 Apr 2021 14:53:57 -0400 Received: from mail-wm1-x32d.google.com (mail-wm1-x32d.google.com [IPv6:2a00:1450:4864:20::32d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 018C7C06174A for ; Tue, 20 Apr 2021 11:53:26 -0700 (PDT) Received: by mail-wm1-x32d.google.com with SMTP id o9-20020a1c41090000b029012c8dac9d47so13788087wma.1 for ; Tue, 20 Apr 2021 11:53:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=waldekranz-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:organization:content-transfer-encoding; bh=dXDESjlngEfW/cK207nlmCV2x7fMh0T+CNSuMzUTgCM=; b=PFTf1Ixc45NDuln8k8nEAUHEesk+H2jtVE1ojEyCI/dbLSZZltoTd/wga9PWWMOhFd fezj0V76DBgD1Y+HGmJ5e+BLw6nHwq8P0fftQEhgKgeA1Hw/jLudwu3/3s0o/W/X3/vq cZoZxWR9YPkEw+s37skYvDXJWitabDJclAP8bOnMgZloZ5mroTbcbXyMD5uhYT9Bb4LB 6RsV6q5GP6jkGZrBfHrCGrlKGrME2Ic3e/rMC8VdmKeGC/+weWZWR5ZuhvdwkKlMRCXm EPl9wHZiqSGKts0lULFfh6lNJTjOh1bxbDksjkSYrWrqv8EIq40CsANGJG1apD5ljgf6 rIRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:organization:content-transfer-encoding; bh=dXDESjlngEfW/cK207nlmCV2x7fMh0T+CNSuMzUTgCM=; b=H2AVR3ISB2RTp9KS0wbLtsxCzs7NbGNiFskHebOMWka23S3mJgh8VngJkCfql3HeQ2 RhQEV2LCkDv7kmNY5BVw6ki6CROUii7P/NiZ7cuZ9SKMrI6hqwWlhiapDGDgFuMW7faX anbq+8XkvVzBIqGck43Xh0VfnvpFg45d+KhFn8J2Iiw8eOv2Ac1SZiHJyR6wH+xLj/DT CyykqRlFDt3/Tvr+fzmpv5FEuVuTXc+OE8vmz6Mf7MuXcZaZMyYLbwimzhfGc+QZl+Wp ZredE6uHdSxiv1UJ2VCZrxUZpF4MK54lkJTM65xNlfvZ6h6XXQFDLq1PL3qlS5LU6qvg vFKA== X-Gm-Message-State: AOAM532D5zwGCXe4RQ5/Qn7qQvGqSQAPQdUfriOkwRdin8j3dsnV+XNT r7gL+cxMP1B9VFnQjqdwUwyBjEtoMEPFjg== X-Google-Smtp-Source: ABdhPJweLlvibxZOtnyrjp1pQ0+w9K+KjayIQ6314W94gDqCnqaKcEuiHYUWKIKbjz2kAvzFBy1lXw== X-Received: by 2002:a1c:4045:: with SMTP id n66mr5735434wma.94.1618944804741; Tue, 20 Apr 2021 11:53:24 -0700 (PDT) Received: from veiron.westermo.com (static-193-12-47-89.cust.tele2.se. [193.12.47.89]) by smtp.gmail.com with ESMTPSA id f7sm25897402wrp.48.2021.04.20.11.53.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Apr 2021 11:53:24 -0700 (PDT) From: Tobias Waldekranz To: davem@davemloft.net, kuba@kernel.org Cc: andrew@lunn.ch, vivien.didelot@gmail.com, f.fainelli@gmail.com, olteanv@gmail.com, netdev@vger.kernel.org, robh+dt@kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 net-next 4/5] net: dsa: Allow default tag protocol to be overridden from DT Date: Tue, 20 Apr 2021 20:53:10 +0200 Message-Id: <20210420185311.899183-5-tobias@waldekranz.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210420185311.899183-1-tobias@waldekranz.com> References: <20210420185311.899183-1-tobias@waldekranz.com> MIME-Version: 1.0 Organization: Westermo Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Some combinations of tag protocols and Ethernet controllers are incompatible, and it is hard for the driver to keep track of these. Therefore, allow the device tree author (typically the board vendor) to inform the driver of this fact by selecting an alternate protocol that is known to work. Signed-off-by: Tobias Waldekranz Reviewed-by: Vladimir Oltean --- include/net/dsa.h | 5 +++ net/dsa/dsa2.c | 103 ++++++++++++++++++++++++++++++++++++++-------- 2 files changed, 91 insertions(+), 17 deletions(-) diff --git a/include/net/dsa.h b/include/net/dsa.h index 1259b0f40684..2b25fe1ad5b7 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -149,6 +149,11 @@ struct dsa_switch_tree { /* Tagging protocol operations */ const struct dsa_device_ops *tag_ops; + /* Default tagging protocol preferred by the switches in this + * tree. + */ + enum dsa_tag_protocol default_proto; + /* * Configuration data for the platform device that owns * this dsa switch tree instance. diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index d7c22e3a1fbf..b71e87909f0e 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -668,6 +668,30 @@ static const struct devlink_ops dsa_devlink_ops = { .sb_occ_tc_port_bind_get = dsa_devlink_sb_occ_tc_port_bind_get, }; +static int dsa_switch_setup_tag_protocol(struct dsa_switch *ds) +{ + const struct dsa_device_ops *tag_ops = ds->dst->tag_ops; + struct dsa_switch_tree *dst = ds->dst; + int port, err; + + if (tag_ops->proto == dst->default_proto) + return 0; + + for (port = 0; port < ds->num_ports; port++) { + if (!dsa_is_cpu_port(ds, port)) + continue; + + err = ds->ops->change_tag_protocol(ds, port, tag_ops->proto); + if (err) { + dev_err(ds->dev, "Unable to use tag protocol \"%s\": %pe\n", + tag_ops->name, ERR_PTR(err)); + return err; + } + } + + return 0; +} + static int dsa_switch_setup(struct dsa_switch *ds) { struct dsa_devlink_priv *dl_priv; @@ -718,6 +742,10 @@ static int dsa_switch_setup(struct dsa_switch *ds) if (err < 0) goto unregister_notifier; + err = dsa_switch_setup_tag_protocol(ds); + if (err) + goto teardown; + devlink_params_publish(ds->devlink); if (!ds->slave_mii_bus && ds->ops->phy_read) { @@ -1068,34 +1096,60 @@ static enum dsa_tag_protocol dsa_get_tag_protocol(struct dsa_port *dp, return ds->ops->get_tag_protocol(ds, dp->index, tag_protocol); } -static int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master) +static int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master, + const char *user_protocol) { struct dsa_switch *ds = dp->ds; struct dsa_switch_tree *dst = ds->dst; const struct dsa_device_ops *tag_ops; - enum dsa_tag_protocol tag_protocol; + enum dsa_tag_protocol default_proto; + + /* Find out which protocol the switch would prefer. */ + default_proto = dsa_get_tag_protocol(dp, master); + if (dst->default_proto) { + if (dst->default_proto != default_proto) { + dev_err(ds->dev, + "A DSA switch tree can have only one tagging protocol\n"); + return -EINVAL; + } + } else { + dst->default_proto = default_proto; + } + + /* See if the user wants to override that preference. */ + if (user_protocol) { + if (!ds->ops->change_tag_protocol) { + dev_err(ds->dev, "Tag protocol cannot be modified\n"); + return -EINVAL; + } + + tag_ops = dsa_find_tagger_by_name(user_protocol); + } else { + tag_ops = dsa_tag_driver_get(default_proto); + } + + if (IS_ERR(tag_ops)) { + if (PTR_ERR(tag_ops) == -ENOPROTOOPT) + return -EPROBE_DEFER; + + dev_warn(ds->dev, "No tagger for this switch\n"); + return PTR_ERR(tag_ops); + } - tag_protocol = dsa_get_tag_protocol(dp, master); if (dst->tag_ops) { - if (dst->tag_ops->proto != tag_protocol) { + if (dst->tag_ops != tag_ops) { dev_err(ds->dev, "A DSA switch tree can have only one tagging protocol\n"); + + dsa_tag_driver_put(tag_ops); return -EINVAL; } + /* In the case of multiple CPU ports per switch, the tagging - * protocol is still reference-counted only per switch tree, so - * nothing to do here. + * protocol is still reference-counted only per switch tree. */ + dsa_tag_driver_put(tag_ops); } else { - tag_ops = dsa_tag_driver_get(tag_protocol); - if (IS_ERR(tag_ops)) { - if (PTR_ERR(tag_ops) == -ENOPROTOOPT) - return -EPROBE_DEFER; - dev_warn(ds->dev, "No tagger for this switch\n"); - dp->master = NULL; - return PTR_ERR(tag_ops); - } - dst->tag_ops = tag_ops; } @@ -1104,6 +1158,19 @@ static int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master) dsa_port_set_tag_protocol(dp, dst->tag_ops); dp->dst = dst; + /* At this point, the tree may be configured to use a different + * tagger than the one chosen by the switch driver during + * .setup, in the case when a user selects a custom protocol + * through the DT. + * + * This is resolved by syncing the driver with the tree in + * dsa_switch_setup_tag_protocol once .setup has run and the + * driver is ready to accept calls to .change_tag_protocol. If + * the driver does not support the custom protocol at that + * point, the tree is wholly rejected, thereby ensuring that the + * tree and driver are always in agreement on the protocol to + * use. + */ return 0; } @@ -1117,12 +1184,14 @@ static int dsa_port_parse_of(struct dsa_port *dp, struct device_node *dn) if (ethernet) { struct net_device *master; + const char *user_protocol; master = of_find_net_device_by_node(ethernet); if (!master) return -EPROBE_DEFER; - return dsa_port_parse_cpu(dp, master); + user_protocol = of_get_property(dn, "dsa-tag-protocol", NULL); + return dsa_port_parse_cpu(dp, master, user_protocol); } if (link) @@ -1234,7 +1303,7 @@ static int dsa_port_parse(struct dsa_port *dp, const char *name, dev_put(master); - return dsa_port_parse_cpu(dp, master); + return dsa_port_parse_cpu(dp, master, NULL); } if (!strcmp(name, "dsa"))